1 | /* |
2 | * Core routines and tables shareable across OS platforms. |
3 | * |
4 | * Copyright (c) 1994-2002 Justin T. Gibbs. |
5 | * Copyright (c) 2000-2003 Adaptec Inc. |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions, and the following disclaimer, |
13 | * without modification. |
14 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
15 | * substantially similar to the "NO WARRANTY" disclaimer below |
16 | * ("Disclaimer") and any redistribution must be conditioned upon |
17 | * including a substantially similar Disclaimer requirement for further |
18 | * binary redistribution. |
19 | * 3. Neither the names of the above-listed copyright holders nor the names |
20 | * of any contributors may be used to endorse or promote products derived |
21 | * from this software without specific prior written permission. |
22 | * |
23 | * Alternatively, this software may be distributed under the terms of the |
24 | * GNU General Public License ("GPL") version 2 as published by the Free |
25 | * Software Foundation. |
26 | * |
27 | * NO WARRANTY |
28 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
29 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
30 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
31 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
32 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
37 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
38 | * POSSIBILITY OF SUCH DAMAGES. |
39 | * |
40 | * $Id: //depot/aic7xxx/aic7xxx/aic79xx.c#250 $ |
41 | */ |
42 | |
43 | #include "aic79xx_osm.h" |
44 | #include "aic79xx_inline.h" |
45 | #include "aicasm/aicasm_insformat.h" |
46 | |
47 | /***************************** Lookup Tables **********************************/ |
48 | static const char *const ahd_chip_names[] = |
49 | { |
50 | "NONE" , |
51 | "aic7901" , |
52 | "aic7902" , |
53 | "aic7901A" |
54 | }; |
55 | |
56 | /* |
57 | * Hardware error codes. |
58 | */ |
59 | struct ahd_hard_error_entry { |
60 | uint8_t errno; |
61 | const char *errmesg; |
62 | }; |
63 | |
64 | static const struct ahd_hard_error_entry ahd_hard_errors[] = { |
65 | { DSCTMOUT, "Discard Timer has timed out" }, |
66 | { ILLOPCODE, "Illegal Opcode in sequencer program" }, |
67 | { SQPARERR, "Sequencer Parity Error" }, |
68 | { DPARERR, "Data-path Parity Error" }, |
69 | { MPARERR, "Scratch or SCB Memory Parity Error" }, |
70 | { CIOPARERR, "CIOBUS Parity Error" }, |
71 | }; |
72 | static const u_int num_errors = ARRAY_SIZE(ahd_hard_errors); |
73 | |
74 | static const struct ahd_phase_table_entry ahd_phase_table[] = |
75 | { |
76 | { P_DATAOUT, NOP, "in Data-out phase" }, |
77 | { P_DATAIN, INITIATOR_ERROR, "in Data-in phase" }, |
78 | { P_DATAOUT_DT, NOP, "in DT Data-out phase" }, |
79 | { P_DATAIN_DT, INITIATOR_ERROR, "in DT Data-in phase" }, |
80 | { P_COMMAND, NOP, "in Command phase" }, |
81 | { P_MESGOUT, NOP, "in Message-out phase" }, |
82 | { P_STATUS, INITIATOR_ERROR, "in Status phase" }, |
83 | { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, |
84 | { P_BUSFREE, NOP, "while idle" }, |
85 | { 0, NOP, "in unknown phase" } |
86 | }; |
87 | |
88 | /* |
89 | * In most cases we only wish to itterate over real phases, so |
90 | * exclude the last element from the count. |
91 | */ |
92 | static const u_int num_phases = ARRAY_SIZE(ahd_phase_table) - 1; |
93 | |
94 | /* Our Sequencer Program */ |
95 | #include "aic79xx_seq.h" |
96 | |
97 | /**************************** Function Declarations ***************************/ |
98 | static void ahd_handle_transmission_error(struct ahd_softc *ahd); |
99 | static void ahd_handle_lqiphase_error(struct ahd_softc *ahd, |
100 | u_int lqistat1); |
101 | static int ahd_handle_pkt_busfree(struct ahd_softc *ahd, |
102 | u_int busfreetime); |
103 | static int ahd_handle_nonpkt_busfree(struct ahd_softc *ahd); |
104 | static void ahd_handle_proto_violation(struct ahd_softc *ahd); |
105 | static void ahd_force_renegotiation(struct ahd_softc *ahd, |
106 | struct ahd_devinfo *devinfo); |
107 | |
108 | static struct ahd_tmode_tstate* |
109 | ahd_alloc_tstate(struct ahd_softc *ahd, |
110 | u_int scsi_id, char channel); |
111 | #ifdef AHD_TARGET_MODE |
112 | static void ahd_free_tstate(struct ahd_softc *ahd, |
113 | u_int scsi_id, char channel, int force); |
114 | #endif |
115 | static void ahd_devlimited_syncrate(struct ahd_softc *ahd, |
116 | struct ahd_initiator_tinfo *, |
117 | u_int *period, |
118 | u_int *ppr_options, |
119 | role_t role); |
120 | static void ahd_update_neg_table(struct ahd_softc *ahd, |
121 | struct ahd_devinfo *devinfo, |
122 | struct ahd_transinfo *tinfo); |
123 | static void ahd_update_pending_scbs(struct ahd_softc *ahd); |
124 | static void ahd_fetch_devinfo(struct ahd_softc *ahd, |
125 | struct ahd_devinfo *devinfo); |
126 | static void ahd_scb_devinfo(struct ahd_softc *ahd, |
127 | struct ahd_devinfo *devinfo, |
128 | struct scb *scb); |
129 | static void ahd_setup_initiator_msgout(struct ahd_softc *ahd, |
130 | struct ahd_devinfo *devinfo, |
131 | struct scb *scb); |
132 | static void ahd_build_transfer_msg(struct ahd_softc *ahd, |
133 | struct ahd_devinfo *devinfo); |
134 | static void ahd_construct_sdtr(struct ahd_softc *ahd, |
135 | struct ahd_devinfo *devinfo, |
136 | u_int period, u_int offset); |
137 | static void ahd_construct_wdtr(struct ahd_softc *ahd, |
138 | struct ahd_devinfo *devinfo, |
139 | u_int bus_width); |
140 | static void ahd_construct_ppr(struct ahd_softc *ahd, |
141 | struct ahd_devinfo *devinfo, |
142 | u_int period, u_int offset, |
143 | u_int bus_width, u_int ppr_options); |
144 | static void ahd_clear_msg_state(struct ahd_softc *ahd); |
145 | static void ahd_handle_message_phase(struct ahd_softc *ahd); |
146 | typedef enum { |
147 | AHDMSG_1B, |
148 | AHDMSG_2B, |
149 | AHDMSG_EXT |
150 | } ahd_msgtype; |
151 | static int ahd_sent_msg(struct ahd_softc *ahd, ahd_msgtype type, |
152 | u_int msgval, int full); |
153 | static int ahd_parse_msg(struct ahd_softc *ahd, |
154 | struct ahd_devinfo *devinfo); |
155 | static int ahd_handle_msg_reject(struct ahd_softc *ahd, |
156 | struct ahd_devinfo *devinfo); |
157 | static void ahd_handle_ign_wide_residue(struct ahd_softc *ahd, |
158 | struct ahd_devinfo *devinfo); |
159 | static void ahd_reinitialize_dataptrs(struct ahd_softc *ahd); |
160 | static void ahd_handle_devreset(struct ahd_softc *ahd, |
161 | struct ahd_devinfo *devinfo, |
162 | u_int lun, cam_status status, |
163 | char *message, int verbose_level); |
164 | #ifdef AHD_TARGET_MODE |
165 | static void ahd_setup_target_msgin(struct ahd_softc *ahd, |
166 | struct ahd_devinfo *devinfo, |
167 | struct scb *scb); |
168 | #endif |
169 | |
170 | static u_int ahd_sglist_size(struct ahd_softc *ahd); |
171 | static u_int ahd_sglist_allocsize(struct ahd_softc *ahd); |
172 | static bus_dmamap_callback_t |
173 | ahd_dmamap_cb; |
174 | static void ahd_initialize_hscbs(struct ahd_softc *ahd); |
175 | static int ahd_init_scbdata(struct ahd_softc *ahd); |
176 | static void ahd_fini_scbdata(struct ahd_softc *ahd); |
177 | static void ahd_setup_iocell_workaround(struct ahd_softc *ahd); |
178 | static void ahd_iocell_first_selection(struct ahd_softc *ahd); |
179 | static void ahd_add_col_list(struct ahd_softc *ahd, |
180 | struct scb *scb, u_int col_idx); |
181 | static void ahd_rem_col_list(struct ahd_softc *ahd, |
182 | struct scb *scb); |
183 | static void ahd_chip_init(struct ahd_softc *ahd); |
184 | static void ahd_qinfifo_requeue(struct ahd_softc *ahd, |
185 | struct scb *prev_scb, |
186 | struct scb *scb); |
187 | static int ahd_qinfifo_count(struct ahd_softc *ahd); |
188 | static int ahd_search_scb_list(struct ahd_softc *ahd, int target, |
189 | char channel, int lun, u_int tag, |
190 | role_t role, uint32_t status, |
191 | ahd_search_action action, |
192 | u_int *list_head, u_int *list_tail, |
193 | u_int tid); |
194 | static void ahd_stitch_tid_list(struct ahd_softc *ahd, |
195 | u_int tid_prev, u_int tid_cur, |
196 | u_int tid_next); |
197 | static void ahd_add_scb_to_free_list(struct ahd_softc *ahd, |
198 | u_int scbid); |
199 | static u_int ahd_rem_wscb(struct ahd_softc *ahd, u_int scbid, |
200 | u_int prev, u_int next, u_int tid); |
201 | static void ahd_reset_current_bus(struct ahd_softc *ahd); |
202 | static void ahd_stat_timer(struct timer_list *t); |
203 | #ifdef AHD_DUMP_SEQ |
204 | static void ahd_dumpseq(struct ahd_softc *ahd); |
205 | #endif |
206 | static void ahd_loadseq(struct ahd_softc *ahd); |
207 | static int ahd_check_patch(struct ahd_softc *ahd, |
208 | const struct patch **start_patch, |
209 | u_int start_instr, u_int *skip_addr); |
210 | static u_int ahd_resolve_seqaddr(struct ahd_softc *ahd, |
211 | u_int address); |
212 | static void ahd_download_instr(struct ahd_softc *ahd, |
213 | u_int instrptr, uint8_t *dconsts); |
214 | static int ahd_probe_stack_size(struct ahd_softc *ahd); |
215 | static int ahd_scb_active_in_fifo(struct ahd_softc *ahd, |
216 | struct scb *scb); |
217 | static void ahd_run_data_fifo(struct ahd_softc *ahd, |
218 | struct scb *scb); |
219 | |
220 | #ifdef AHD_TARGET_MODE |
221 | static void ahd_queue_lstate_event(struct ahd_softc *ahd, |
222 | struct ahd_tmode_lstate *lstate, |
223 | u_int initiator_id, |
224 | u_int event_type, |
225 | u_int event_arg); |
226 | static void ahd_update_scsiid(struct ahd_softc *ahd, |
227 | u_int targid_mask); |
228 | static int ahd_handle_target_cmd(struct ahd_softc *ahd, |
229 | struct target_cmd *cmd); |
230 | #endif |
231 | |
232 | static int ahd_abort_scbs(struct ahd_softc *ahd, int target, |
233 | char channel, int lun, u_int tag, |
234 | role_t role, uint32_t status); |
235 | static void ahd_alloc_scbs(struct ahd_softc *ahd); |
236 | static void ahd_busy_tcl(struct ahd_softc *ahd, u_int tcl, |
237 | u_int scbid); |
238 | static void ahd_calc_residual(struct ahd_softc *ahd, |
239 | struct scb *scb); |
240 | static void ahd_clear_critical_section(struct ahd_softc *ahd); |
241 | static void ahd_clear_intstat(struct ahd_softc *ahd); |
242 | static void ahd_enable_coalescing(struct ahd_softc *ahd, |
243 | int enable); |
244 | static u_int ahd_find_busy_tcl(struct ahd_softc *ahd, u_int tcl); |
245 | static void ahd_freeze_devq(struct ahd_softc *ahd, |
246 | struct scb *scb); |
247 | static void ahd_handle_scb_status(struct ahd_softc *ahd, |
248 | struct scb *scb); |
249 | static const struct ahd_phase_table_entry* ahd_lookup_phase_entry(int phase); |
250 | static void ahd_shutdown(void *arg); |
251 | static void ahd_update_coalescing_values(struct ahd_softc *ahd, |
252 | u_int timer, |
253 | u_int maxcmds, |
254 | u_int mincmds); |
255 | static int ahd_verify_vpd_cksum(struct vpd_config *vpd); |
256 | static int ahd_wait_seeprom(struct ahd_softc *ahd); |
257 | static int ahd_match_scb(struct ahd_softc *ahd, struct scb *scb, |
258 | int target, char channel, int lun, |
259 | u_int tag, role_t role); |
260 | |
261 | static void ahd_reset_cmds_pending(struct ahd_softc *ahd); |
262 | |
263 | /*************************** Interrupt Services *******************************/ |
264 | static void ahd_run_qoutfifo(struct ahd_softc *ahd); |
265 | #ifdef AHD_TARGET_MODE |
266 | static void ahd_run_tqinfifo(struct ahd_softc *ahd, int paused); |
267 | #endif |
268 | static void ahd_handle_hwerrint(struct ahd_softc *ahd); |
269 | static void ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat); |
270 | static void ahd_handle_scsiint(struct ahd_softc *ahd, |
271 | u_int intstat); |
272 | |
273 | /************************ Sequencer Execution Control *************************/ |
274 | void |
275 | ahd_set_modes(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst) |
276 | { |
277 | if (ahd->src_mode == src && ahd->dst_mode == dst) |
278 | return; |
279 | #ifdef AHD_DEBUG |
280 | if (ahd->src_mode == AHD_MODE_UNKNOWN |
281 | || ahd->dst_mode == AHD_MODE_UNKNOWN) |
282 | panic(fmt: "Setting mode prior to saving it.\n" ); |
283 | if ((ahd_debug & AHD_SHOW_MODEPTR) != 0) |
284 | printk("%s: Setting mode 0x%x\n" , ahd_name(ahd), |
285 | ahd_build_mode_state(ahd, src, dst)); |
286 | #endif |
287 | ahd_outb(ahd, port: MODE_PTR, val: ahd_build_mode_state(ahd, src, dst)); |
288 | ahd->src_mode = src; |
289 | ahd->dst_mode = dst; |
290 | } |
291 | |
292 | static void |
293 | ahd_update_modes(struct ahd_softc *ahd) |
294 | { |
295 | ahd_mode_state mode_ptr; |
296 | ahd_mode src; |
297 | ahd_mode dst; |
298 | |
299 | mode_ptr = ahd_inb(ahd, port: MODE_PTR); |
300 | #ifdef AHD_DEBUG |
301 | if ((ahd_debug & AHD_SHOW_MODEPTR) != 0) |
302 | printk("Reading mode 0x%x\n" , mode_ptr); |
303 | #endif |
304 | ahd_extract_mode_state(ahd, state: mode_ptr, src: &src, dst: &dst); |
305 | ahd_known_modes(ahd, src, dst); |
306 | } |
307 | |
308 | static void |
309 | ahd_assert_modes(struct ahd_softc *ahd, ahd_mode srcmode, |
310 | ahd_mode dstmode, const char *file, int line) |
311 | { |
312 | #ifdef AHD_DEBUG |
313 | if ((srcmode & AHD_MK_MSK(ahd->src_mode)) == 0 |
314 | || (dstmode & AHD_MK_MSK(ahd->dst_mode)) == 0) { |
315 | panic(fmt: "%s:%s:%d: Mode assertion failed.\n" , |
316 | ahd_name(ahd), file, line); |
317 | } |
318 | #endif |
319 | } |
320 | |
321 | #define AHD_ASSERT_MODES(ahd, source, dest) \ |
322 | ahd_assert_modes(ahd, source, dest, __FILE__, __LINE__); |
323 | |
324 | ahd_mode_state |
325 | ahd_save_modes(struct ahd_softc *ahd) |
326 | { |
327 | if (ahd->src_mode == AHD_MODE_UNKNOWN |
328 | || ahd->dst_mode == AHD_MODE_UNKNOWN) |
329 | ahd_update_modes(ahd); |
330 | |
331 | return (ahd_build_mode_state(ahd, src: ahd->src_mode, dst: ahd->dst_mode)); |
332 | } |
333 | |
334 | void |
335 | ahd_restore_modes(struct ahd_softc *ahd, ahd_mode_state state) |
336 | { |
337 | ahd_mode src; |
338 | ahd_mode dst; |
339 | |
340 | ahd_extract_mode_state(ahd, state, src: &src, dst: &dst); |
341 | ahd_set_modes(ahd, src, dst); |
342 | } |
343 | |
344 | /* |
345 | * Determine whether the sequencer has halted code execution. |
346 | * Returns non-zero status if the sequencer is stopped. |
347 | */ |
348 | int |
349 | ahd_is_paused(struct ahd_softc *ahd) |
350 | { |
351 | return ((ahd_inb(ahd, HCNTRL) & PAUSE) != 0); |
352 | } |
353 | |
354 | /* |
355 | * Request that the sequencer stop and wait, indefinitely, for it |
356 | * to stop. The sequencer will only acknowledge that it is paused |
357 | * once it has reached an instruction boundary and PAUSEDIS is |
358 | * cleared in the SEQCTL register. The sequencer may use PAUSEDIS |
359 | * for critical sections. |
360 | */ |
361 | void |
362 | ahd_pause(struct ahd_softc *ahd) |
363 | { |
364 | ahd_outb(ahd, port: HCNTRL, val: ahd->pause); |
365 | |
366 | /* |
367 | * Since the sequencer can disable pausing in a critical section, we |
368 | * must loop until it actually stops. |
369 | */ |
370 | while (ahd_is_paused(ahd) == 0) |
371 | ; |
372 | } |
373 | |
374 | /* |
375 | * Allow the sequencer to continue program execution. |
376 | * We check here to ensure that no additional interrupt |
377 | * sources that would cause the sequencer to halt have been |
378 | * asserted. If, for example, a SCSI bus reset is detected |
379 | * while we are fielding a different, pausing, interrupt type, |
380 | * we don't want to release the sequencer before going back |
381 | * into our interrupt handler and dealing with this new |
382 | * condition. |
383 | */ |
384 | void |
385 | ahd_unpause(struct ahd_softc *ahd) |
386 | { |
387 | /* |
388 | * Automatically restore our modes to those saved |
389 | * prior to the first change of the mode. |
390 | */ |
391 | if (ahd->saved_src_mode != AHD_MODE_UNKNOWN |
392 | && ahd->saved_dst_mode != AHD_MODE_UNKNOWN) { |
393 | if ((ahd->flags & AHD_UPDATE_PEND_CMDS) != 0) |
394 | ahd_reset_cmds_pending(ahd); |
395 | ahd_set_modes(ahd, src: ahd->saved_src_mode, dst: ahd->saved_dst_mode); |
396 | } |
397 | |
398 | if ((ahd_inb(ahd, INTSTAT) & ~CMDCMPLT) == 0) |
399 | ahd_outb(ahd, port: HCNTRL, val: ahd->unpause); |
400 | |
401 | ahd_known_modes(ahd, src: AHD_MODE_UNKNOWN, dst: AHD_MODE_UNKNOWN); |
402 | } |
403 | |
404 | /*********************** Scatter Gather List Handling *************************/ |
405 | void * |
406 | ahd_sg_setup(struct ahd_softc *ahd, struct scb *scb, |
407 | void *sgptr, dma_addr_t addr, bus_size_t len, int last) |
408 | { |
409 | scb->sg_count++; |
410 | if (sizeof(dma_addr_t) > 4 |
411 | && (ahd->flags & AHD_64BIT_ADDRESSING) != 0) { |
412 | struct ahd_dma64_seg *sg; |
413 | |
414 | sg = (struct ahd_dma64_seg *)sgptr; |
415 | sg->addr = ahd_htole64(addr); |
416 | sg->len = ahd_htole32(len | (last ? AHD_DMA_LAST_SEG : 0)); |
417 | return (sg + 1); |
418 | } else { |
419 | struct ahd_dma_seg *sg; |
420 | |
421 | sg = (struct ahd_dma_seg *)sgptr; |
422 | sg->addr = ahd_htole32(addr & 0xFFFFFFFF); |
423 | sg->len = ahd_htole32(len | ((addr >> 8) & 0x7F000000) |
424 | | (last ? AHD_DMA_LAST_SEG : 0)); |
425 | return (sg + 1); |
426 | } |
427 | } |
428 | |
429 | static void |
430 | ahd_setup_scb_common(struct ahd_softc *ahd, struct scb *scb) |
431 | { |
432 | /* XXX Handle target mode SCBs. */ |
433 | scb->crc_retry_count = 0; |
434 | if ((scb->flags & SCB_PACKETIZED) != 0) { |
435 | /* XXX what about ACA?? It is type 4, but TAG_TYPE == 0x3. */ |
436 | scb->hscb->task_attribute = scb->hscb->control & SCB_TAG_TYPE; |
437 | } else { |
438 | if (ahd_get_transfer_length(scb) & 0x01) |
439 | scb->hscb->task_attribute = SCB_XFERLEN_ODD; |
440 | else |
441 | scb->hscb->task_attribute = 0; |
442 | } |
443 | |
444 | if (scb->hscb->cdb_len <= MAX_CDB_LEN_WITH_SENSE_ADDR |
445 | || (scb->hscb->cdb_len & SCB_CDB_LEN_PTR) != 0) |
446 | scb->hscb->shared_data.idata.cdb_plus_saddr.sense_addr = |
447 | ahd_htole32(scb->sense_busaddr); |
448 | } |
449 | |
450 | static void |
451 | ahd_setup_data_scb(struct ahd_softc *ahd, struct scb *scb) |
452 | { |
453 | /* |
454 | * Copy the first SG into the "current" data ponter area. |
455 | */ |
456 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) { |
457 | struct ahd_dma64_seg *sg; |
458 | |
459 | sg = (struct ahd_dma64_seg *)scb->sg_list; |
460 | scb->hscb->dataptr = sg->addr; |
461 | scb->hscb->datacnt = sg->len; |
462 | } else { |
463 | struct ahd_dma_seg *sg; |
464 | uint32_t *dataptr_words; |
465 | |
466 | sg = (struct ahd_dma_seg *)scb->sg_list; |
467 | dataptr_words = (uint32_t*)&scb->hscb->dataptr; |
468 | dataptr_words[0] = sg->addr; |
469 | dataptr_words[1] = 0; |
470 | if ((ahd->flags & AHD_39BIT_ADDRESSING) != 0) { |
471 | uint64_t high_addr; |
472 | |
473 | high_addr = ahd_le32toh(sg->len) & 0x7F000000; |
474 | scb->hscb->dataptr |= ahd_htole64(high_addr << 8); |
475 | } |
476 | scb->hscb->datacnt = sg->len; |
477 | } |
478 | /* |
479 | * Note where to find the SG entries in bus space. |
480 | * We also set the full residual flag which the |
481 | * sequencer will clear as soon as a data transfer |
482 | * occurs. |
483 | */ |
484 | scb->hscb->sgptr = ahd_htole32(scb->sg_list_busaddr|SG_FULL_RESID); |
485 | } |
486 | |
487 | static void |
488 | ahd_setup_noxfer_scb(struct ahd_softc *ahd, struct scb *scb) |
489 | { |
490 | scb->hscb->sgptr = ahd_htole32(SG_LIST_NULL); |
491 | scb->hscb->dataptr = 0; |
492 | scb->hscb->datacnt = 0; |
493 | } |
494 | |
495 | /************************** Memory mapping routines ***************************/ |
496 | static void * |
497 | ahd_sg_bus_to_virt(struct ahd_softc *ahd, struct scb *scb, uint32_t sg_busaddr) |
498 | { |
499 | dma_addr_t sg_offset; |
500 | |
501 | /* sg_list_phys points to entry 1, not 0 */ |
502 | sg_offset = sg_busaddr - (scb->sg_list_busaddr - ahd_sg_size(ahd)); |
503 | return ((uint8_t *)scb->sg_list + sg_offset); |
504 | } |
505 | |
506 | static uint32_t |
507 | ahd_sg_virt_to_bus(struct ahd_softc *ahd, struct scb *scb, void *sg) |
508 | { |
509 | dma_addr_t sg_offset; |
510 | |
511 | /* sg_list_phys points to entry 1, not 0 */ |
512 | sg_offset = ((uint8_t *)sg - (uint8_t *)scb->sg_list) |
513 | - ahd_sg_size(ahd); |
514 | |
515 | return (scb->sg_list_busaddr + sg_offset); |
516 | } |
517 | |
518 | static void |
519 | ahd_sync_scb(struct ahd_softc *ahd, struct scb *scb, int op) |
520 | { |
521 | ahd_dmamap_sync(ahd, ahd->scb_data.hscb_dmat, |
522 | scb->hscb_map->dmamap, |
523 | /*offset*/(uint8_t*)scb->hscb - scb->hscb_map->vaddr, |
524 | /*len*/sizeof(*scb->hscb), op); |
525 | } |
526 | |
527 | void |
528 | ahd_sync_sglist(struct ahd_softc *ahd, struct scb *scb, int op) |
529 | { |
530 | if (scb->sg_count == 0) |
531 | return; |
532 | |
533 | ahd_dmamap_sync(ahd, ahd->scb_data.sg_dmat, |
534 | scb->sg_map->dmamap, |
535 | /*offset*/scb->sg_list_busaddr - ahd_sg_size(ahd), |
536 | /*len*/ahd_sg_size(ahd) * scb->sg_count, op); |
537 | } |
538 | |
539 | static void |
540 | ahd_sync_sense(struct ahd_softc *ahd, struct scb *scb, int op) |
541 | { |
542 | ahd_dmamap_sync(ahd, ahd->scb_data.sense_dmat, |
543 | scb->sense_map->dmamap, |
544 | /*offset*/scb->sense_busaddr, |
545 | /*len*/AHD_SENSE_BUFSIZE, op); |
546 | } |
547 | |
548 | #ifdef AHD_TARGET_MODE |
549 | static uint32_t |
550 | ahd_targetcmd_offset(struct ahd_softc *ahd, u_int index) |
551 | { |
552 | return (((uint8_t *)&ahd->targetcmds[index]) |
553 | - (uint8_t *)ahd->qoutfifo); |
554 | } |
555 | #endif |
556 | |
557 | /*********************** Miscellaneous Support Functions ***********************/ |
558 | /* |
559 | * Return pointers to the transfer negotiation information |
560 | * for the specified our_id/remote_id pair. |
561 | */ |
562 | struct ahd_initiator_tinfo * |
563 | ahd_fetch_transinfo(struct ahd_softc *ahd, char channel, u_int our_id, |
564 | u_int remote_id, struct ahd_tmode_tstate **tstate) |
565 | { |
566 | /* |
567 | * Transfer data structures are stored from the perspective |
568 | * of the target role. Since the parameters for a connection |
569 | * in the initiator role to a given target are the same as |
570 | * when the roles are reversed, we pretend we are the target. |
571 | */ |
572 | if (channel == 'B') |
573 | our_id += 8; |
574 | *tstate = ahd->enabled_targets[our_id]; |
575 | return (&(*tstate)->transinfo[remote_id]); |
576 | } |
577 | |
578 | uint16_t |
579 | ahd_inw(struct ahd_softc *ahd, u_int port) |
580 | { |
581 | /* |
582 | * Read high byte first as some registers increment |
583 | * or have other side effects when the low byte is |
584 | * read. |
585 | */ |
586 | uint16_t r = ahd_inb(ahd, port: port+1) << 8; |
587 | return r | ahd_inb(ahd, port); |
588 | } |
589 | |
590 | void |
591 | ahd_outw(struct ahd_softc *ahd, u_int port, u_int value) |
592 | { |
593 | /* |
594 | * Write low byte first to accommodate registers |
595 | * such as PRGMCNT where the order maters. |
596 | */ |
597 | ahd_outb(ahd, port, val: value & 0xFF); |
598 | ahd_outb(ahd, port: port+1, val: (value >> 8) & 0xFF); |
599 | } |
600 | |
601 | uint32_t |
602 | ahd_inl(struct ahd_softc *ahd, u_int port) |
603 | { |
604 | return ((ahd_inb(ahd, port)) |
605 | | (ahd_inb(ahd, port: port+1) << 8) |
606 | | (ahd_inb(ahd, port: port+2) << 16) |
607 | | (ahd_inb(ahd, port: port+3) << 24)); |
608 | } |
609 | |
610 | void |
611 | ahd_outl(struct ahd_softc *ahd, u_int port, uint32_t value) |
612 | { |
613 | ahd_outb(ahd, port, val: (value) & 0xFF); |
614 | ahd_outb(ahd, port: port+1, val: ((value) >> 8) & 0xFF); |
615 | ahd_outb(ahd, port: port+2, val: ((value) >> 16) & 0xFF); |
616 | ahd_outb(ahd, port: port+3, val: ((value) >> 24) & 0xFF); |
617 | } |
618 | |
619 | uint64_t |
620 | ahd_inq(struct ahd_softc *ahd, u_int port) |
621 | { |
622 | return ((ahd_inb(ahd, port)) |
623 | | (ahd_inb(ahd, port: port+1) << 8) |
624 | | (ahd_inb(ahd, port: port+2) << 16) |
625 | | (ahd_inb(ahd, port: port+3) << 24) |
626 | | (((uint64_t)ahd_inb(ahd, port: port+4)) << 32) |
627 | | (((uint64_t)ahd_inb(ahd, port: port+5)) << 40) |
628 | | (((uint64_t)ahd_inb(ahd, port: port+6)) << 48) |
629 | | (((uint64_t)ahd_inb(ahd, port: port+7)) << 56)); |
630 | } |
631 | |
632 | void |
633 | ahd_outq(struct ahd_softc *ahd, u_int port, uint64_t value) |
634 | { |
635 | ahd_outb(ahd, port, val: value & 0xFF); |
636 | ahd_outb(ahd, port: port+1, val: (value >> 8) & 0xFF); |
637 | ahd_outb(ahd, port: port+2, val: (value >> 16) & 0xFF); |
638 | ahd_outb(ahd, port: port+3, val: (value >> 24) & 0xFF); |
639 | ahd_outb(ahd, port: port+4, val: (value >> 32) & 0xFF); |
640 | ahd_outb(ahd, port: port+5, val: (value >> 40) & 0xFF); |
641 | ahd_outb(ahd, port: port+6, val: (value >> 48) & 0xFF); |
642 | ahd_outb(ahd, port: port+7, val: (value >> 56) & 0xFF); |
643 | } |
644 | |
645 | u_int |
646 | ahd_get_scbptr(struct ahd_softc *ahd) |
647 | { |
648 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
649 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
650 | return (ahd_inb(ahd, SCBPTR) | (ahd_inb(ahd, SCBPTR + 1) << 8)); |
651 | } |
652 | |
653 | void |
654 | ahd_set_scbptr(struct ahd_softc *ahd, u_int scbptr) |
655 | { |
656 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
657 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
658 | ahd_outb(ahd, port: SCBPTR, val: scbptr & 0xFF); |
659 | ahd_outb(ahd, port: SCBPTR+1, val: (scbptr >> 8) & 0xFF); |
660 | } |
661 | |
662 | #if 0 /* unused */ |
663 | static u_int |
664 | ahd_get_hnscb_qoff(struct ahd_softc *ahd) |
665 | { |
666 | return (ahd_inw_atomic(ahd, HNSCB_QOFF)); |
667 | } |
668 | #endif |
669 | |
670 | static void |
671 | ahd_set_hnscb_qoff(struct ahd_softc *ahd, u_int value) |
672 | { |
673 | ahd_outw_atomic(ahd, port: HNSCB_QOFF, val: value); |
674 | } |
675 | |
676 | #if 0 /* unused */ |
677 | static u_int |
678 | ahd_get_hescb_qoff(struct ahd_softc *ahd) |
679 | { |
680 | return (ahd_inb(ahd, HESCB_QOFF)); |
681 | } |
682 | #endif |
683 | |
684 | static void |
685 | ahd_set_hescb_qoff(struct ahd_softc *ahd, u_int value) |
686 | { |
687 | ahd_outb(ahd, port: HESCB_QOFF, val: value); |
688 | } |
689 | |
690 | static u_int |
691 | ahd_get_snscb_qoff(struct ahd_softc *ahd) |
692 | { |
693 | u_int oldvalue; |
694 | |
695 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
696 | oldvalue = ahd_inw(ahd, port: SNSCB_QOFF); |
697 | ahd_outw(ahd, SNSCB_QOFF, oldvalue); |
698 | return (oldvalue); |
699 | } |
700 | |
701 | static void |
702 | ahd_set_snscb_qoff(struct ahd_softc *ahd, u_int value) |
703 | { |
704 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
705 | ahd_outw(ahd, SNSCB_QOFF, value); |
706 | } |
707 | |
708 | #if 0 /* unused */ |
709 | static u_int |
710 | ahd_get_sescb_qoff(struct ahd_softc *ahd) |
711 | { |
712 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
713 | return (ahd_inb(ahd, SESCB_QOFF)); |
714 | } |
715 | #endif |
716 | |
717 | static void |
718 | ahd_set_sescb_qoff(struct ahd_softc *ahd, u_int value) |
719 | { |
720 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
721 | ahd_outb(ahd, SESCB_QOFF, value); |
722 | } |
723 | |
724 | #if 0 /* unused */ |
725 | static u_int |
726 | ahd_get_sdscb_qoff(struct ahd_softc *ahd) |
727 | { |
728 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
729 | return (ahd_inb(ahd, SDSCB_QOFF) | (ahd_inb(ahd, SDSCB_QOFF + 1) << 8)); |
730 | } |
731 | #endif |
732 | |
733 | static void |
734 | ahd_set_sdscb_qoff(struct ahd_softc *ahd, u_int value) |
735 | { |
736 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
737 | ahd_outb(ahd, SDSCB_QOFF, value & 0xFF); |
738 | ahd_outb(ahd, SDSCB_QOFF+1, (value >> 8) & 0xFF); |
739 | } |
740 | |
741 | u_int |
742 | ahd_inb_scbram(struct ahd_softc *ahd, u_int offset) |
743 | { |
744 | u_int value; |
745 | |
746 | /* |
747 | * Workaround PCI-X Rev A. hardware bug. |
748 | * After a host read of SCB memory, the chip |
749 | * may become confused into thinking prefetch |
750 | * was required. This starts the discard timer |
751 | * running and can cause an unexpected discard |
752 | * timer interrupt. The work around is to read |
753 | * a normal register prior to the exhaustion of |
754 | * the discard timer. The mode pointer register |
755 | * has no side effects and so serves well for |
756 | * this purpose. |
757 | * |
758 | * Razor #528 |
759 | */ |
760 | value = ahd_inb(ahd, port: offset); |
761 | if ((ahd->bugs & AHD_PCIX_SCBRAM_RD_BUG) != 0) |
762 | ahd_inb(ahd, MODE_PTR); |
763 | return (value); |
764 | } |
765 | |
766 | u_int |
767 | ahd_inw_scbram(struct ahd_softc *ahd, u_int offset) |
768 | { |
769 | return (ahd_inb_scbram(ahd, offset) |
770 | | (ahd_inb_scbram(ahd, offset: offset+1) << 8)); |
771 | } |
772 | |
773 | static uint32_t |
774 | ahd_inl_scbram(struct ahd_softc *ahd, u_int offset) |
775 | { |
776 | return (ahd_inw_scbram(ahd, offset) |
777 | | (ahd_inw_scbram(ahd, offset: offset+2) << 16)); |
778 | } |
779 | |
780 | static uint64_t |
781 | ahd_inq_scbram(struct ahd_softc *ahd, u_int offset) |
782 | { |
783 | return (ahd_inl_scbram(ahd, offset) |
784 | | ((uint64_t)ahd_inl_scbram(ahd, offset: offset+4)) << 32); |
785 | } |
786 | |
787 | struct scb * |
788 | ahd_lookup_scb(struct ahd_softc *ahd, u_int tag) |
789 | { |
790 | struct scb* scb; |
791 | |
792 | if (tag >= AHD_SCB_MAX) |
793 | return (NULL); |
794 | scb = ahd->scb_data.scbindex[tag]; |
795 | if (scb != NULL) |
796 | ahd_sync_scb(ahd, scb, |
797 | BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); |
798 | return (scb); |
799 | } |
800 | |
801 | static void |
802 | ahd_swap_with_next_hscb(struct ahd_softc *ahd, struct scb *scb) |
803 | { |
804 | struct hardware_scb *q_hscb; |
805 | struct map_node *q_hscb_map; |
806 | uint32_t saved_hscb_busaddr; |
807 | |
808 | /* |
809 | * Our queuing method is a bit tricky. The card |
810 | * knows in advance which HSCB (by address) to download, |
811 | * and we can't disappoint it. To achieve this, the next |
812 | * HSCB to download is saved off in ahd->next_queued_hscb. |
813 | * When we are called to queue "an arbitrary scb", |
814 | * we copy the contents of the incoming HSCB to the one |
815 | * the sequencer knows about, swap HSCB pointers and |
816 | * finally assign the SCB to the tag indexed location |
817 | * in the scb_array. This makes sure that we can still |
818 | * locate the correct SCB by SCB_TAG. |
819 | */ |
820 | q_hscb = ahd->next_queued_hscb; |
821 | q_hscb_map = ahd->next_queued_hscb_map; |
822 | saved_hscb_busaddr = q_hscb->hscb_busaddr; |
823 | memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb)); |
824 | q_hscb->hscb_busaddr = saved_hscb_busaddr; |
825 | q_hscb->next_hscb_busaddr = scb->hscb->hscb_busaddr; |
826 | |
827 | /* Now swap HSCB pointers. */ |
828 | ahd->next_queued_hscb = scb->hscb; |
829 | ahd->next_queued_hscb_map = scb->hscb_map; |
830 | scb->hscb = q_hscb; |
831 | scb->hscb_map = q_hscb_map; |
832 | |
833 | /* Now define the mapping from tag to SCB in the scbindex */ |
834 | ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = scb; |
835 | } |
836 | |
837 | /* |
838 | * Tell the sequencer about a new transaction to execute. |
839 | */ |
840 | void |
841 | ahd_queue_scb(struct ahd_softc *ahd, struct scb *scb) |
842 | { |
843 | ahd_swap_with_next_hscb(ahd, scb); |
844 | |
845 | if (SCBID_IS_NULL(SCB_GET_TAG(scb))) |
846 | panic(fmt: "Attempt to queue invalid SCB tag %x\n" , |
847 | SCB_GET_TAG(scb)); |
848 | |
849 | /* |
850 | * Keep a history of SCBs we've downloaded in the qinfifo. |
851 | */ |
852 | ahd->qinfifo[AHD_QIN_WRAP(ahd->qinfifonext)] = SCB_GET_TAG(scb); |
853 | ahd->qinfifonext++; |
854 | |
855 | if (scb->sg_count != 0) |
856 | ahd_setup_data_scb(ahd, scb); |
857 | else |
858 | ahd_setup_noxfer_scb(ahd, scb); |
859 | ahd_setup_scb_common(ahd, scb); |
860 | |
861 | /* |
862 | * Make sure our data is consistent from the |
863 | * perspective of the adapter. |
864 | */ |
865 | ahd_sync_scb(ahd, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
866 | |
867 | #ifdef AHD_DEBUG |
868 | if ((ahd_debug & AHD_SHOW_QUEUE) != 0) { |
869 | uint64_t host_dataptr; |
870 | |
871 | host_dataptr = ahd_le64toh(scb->hscb->dataptr); |
872 | printk("%s: Queueing SCB %d:0x%x bus addr 0x%x - 0x%x%x/0x%x\n" , |
873 | ahd_name(ahd), |
874 | SCB_GET_TAG(scb), scb->hscb->scsiid, |
875 | ahd_le32toh(scb->hscb->hscb_busaddr), |
876 | (u_int)((host_dataptr >> 32) & 0xFFFFFFFF), |
877 | (u_int)(host_dataptr & 0xFFFFFFFF), |
878 | ahd_le32toh(scb->hscb->datacnt)); |
879 | } |
880 | #endif |
881 | /* Tell the adapter about the newly queued SCB */ |
882 | ahd_set_hnscb_qoff(ahd, value: ahd->qinfifonext); |
883 | } |
884 | |
885 | /************************** Interrupt Processing ******************************/ |
886 | static void |
887 | ahd_sync_qoutfifo(struct ahd_softc *ahd, int op) |
888 | { |
889 | ahd_dmamap_sync(ahd, ahd->shared_data_dmat, ahd->shared_data_map.dmamap, |
890 | /*offset*/0, |
891 | /*len*/AHD_SCB_MAX * sizeof(struct ahd_completion), op); |
892 | } |
893 | |
894 | static void |
895 | ahd_sync_tqinfifo(struct ahd_softc *ahd, int op) |
896 | { |
897 | #ifdef AHD_TARGET_MODE |
898 | if ((ahd->flags & AHD_TARGETROLE) != 0) { |
899 | ahd_dmamap_sync(ahd, ahd->shared_data_dmat, |
900 | ahd->shared_data_map.dmamap, |
901 | ahd_targetcmd_offset(ahd, 0), |
902 | sizeof(struct target_cmd) * AHD_TMODE_CMDS, |
903 | op); |
904 | } |
905 | #endif |
906 | } |
907 | |
908 | /* |
909 | * See if the firmware has posted any completed commands |
910 | * into our in-core command complete fifos. |
911 | */ |
912 | #define AHD_RUN_QOUTFIFO 0x1 |
913 | #define AHD_RUN_TQINFIFO 0x2 |
914 | static u_int |
915 | ahd_check_cmdcmpltqueues(struct ahd_softc *ahd) |
916 | { |
917 | u_int retval; |
918 | |
919 | retval = 0; |
920 | ahd_dmamap_sync(ahd, ahd->shared_data_dmat, ahd->shared_data_map.dmamap, |
921 | /*offset*/ahd->qoutfifonext * sizeof(*ahd->qoutfifo), |
922 | /*len*/sizeof(*ahd->qoutfifo), BUS_DMASYNC_POSTREAD); |
923 | if (ahd->qoutfifo[ahd->qoutfifonext].valid_tag |
924 | == ahd->qoutfifonext_valid_tag) |
925 | retval |= AHD_RUN_QOUTFIFO; |
926 | #ifdef AHD_TARGET_MODE |
927 | if ((ahd->flags & AHD_TARGETROLE) != 0 |
928 | && (ahd->flags & AHD_TQINFIFO_BLOCKED) == 0) { |
929 | ahd_dmamap_sync(ahd, ahd->shared_data_dmat, |
930 | ahd->shared_data_map.dmamap, |
931 | ahd_targetcmd_offset(ahd, ahd->tqinfifofnext), |
932 | /*len*/sizeof(struct target_cmd), |
933 | BUS_DMASYNC_POSTREAD); |
934 | if (ahd->targetcmds[ahd->tqinfifonext].cmd_valid != 0) |
935 | retval |= AHD_RUN_TQINFIFO; |
936 | } |
937 | #endif |
938 | return (retval); |
939 | } |
940 | |
941 | /* |
942 | * Catch an interrupt from the adapter |
943 | */ |
944 | int |
945 | ahd_intr(struct ahd_softc *ahd) |
946 | { |
947 | u_int intstat; |
948 | |
949 | if ((ahd->pause & INTEN) == 0) { |
950 | /* |
951 | * Our interrupt is not enabled on the chip |
952 | * and may be disabled for re-entrancy reasons, |
953 | * so just return. This is likely just a shared |
954 | * interrupt. |
955 | */ |
956 | return (0); |
957 | } |
958 | |
959 | /* |
960 | * Instead of directly reading the interrupt status register, |
961 | * infer the cause of the interrupt by checking our in-core |
962 | * completion queues. This avoids a costly PCI bus read in |
963 | * most cases. |
964 | */ |
965 | if ((ahd->flags & AHD_ALL_INTERRUPTS) == 0 |
966 | && (ahd_check_cmdcmpltqueues(ahd) != 0)) |
967 | intstat = CMDCMPLT; |
968 | else |
969 | intstat = ahd_inb(ahd, INTSTAT); |
970 | |
971 | if ((intstat & INT_PEND) == 0) |
972 | return (0); |
973 | |
974 | if (intstat & CMDCMPLT) { |
975 | ahd_outb(ahd, CLRINT, CLRCMDINT); |
976 | |
977 | /* |
978 | * Ensure that the chip sees that we've cleared |
979 | * this interrupt before we walk the output fifo. |
980 | * Otherwise, we may, due to posted bus writes, |
981 | * clear the interrupt after we finish the scan, |
982 | * and after the sequencer has added new entries |
983 | * and asserted the interrupt again. |
984 | */ |
985 | if ((ahd->bugs & AHD_INTCOLLISION_BUG) != 0) { |
986 | if (ahd_is_paused(ahd)) { |
987 | /* |
988 | * Potentially lost SEQINT. |
989 | * If SEQINTCODE is non-zero, |
990 | * simulate the SEQINT. |
991 | */ |
992 | if (ahd_inb(ahd, SEQINTCODE) != NO_SEQINT) |
993 | intstat |= SEQINT; |
994 | } |
995 | } else { |
996 | ahd_flush_device_writes(ahd); |
997 | } |
998 | ahd_run_qoutfifo(ahd); |
999 | ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket]++; |
1000 | ahd->cmdcmplt_total++; |
1001 | #ifdef AHD_TARGET_MODE |
1002 | if ((ahd->flags & AHD_TARGETROLE) != 0) |
1003 | ahd_run_tqinfifo(ahd, /*paused*/FALSE); |
1004 | #endif |
1005 | } |
1006 | |
1007 | /* |
1008 | * Handle statuses that may invalidate our cached |
1009 | * copy of INTSTAT separately. |
1010 | */ |
1011 | if (intstat == 0xFF && (ahd->features & AHD_REMOVABLE) != 0) { |
1012 | /* Hot eject. Do nothing */ |
1013 | } else if (intstat & HWERRINT) { |
1014 | ahd_handle_hwerrint(ahd); |
1015 | } else if ((intstat & (PCIINT|SPLTINT)) != 0) { |
1016 | ahd->bus_intr(ahd); |
1017 | } else { |
1018 | |
1019 | if ((intstat & SEQINT) != 0) |
1020 | ahd_handle_seqint(ahd, intstat); |
1021 | |
1022 | if ((intstat & SCSIINT) != 0) |
1023 | ahd_handle_scsiint(ahd, intstat); |
1024 | } |
1025 | return (1); |
1026 | } |
1027 | |
1028 | /******************************** Private Inlines *****************************/ |
1029 | static inline void |
1030 | ahd_assert_atn(struct ahd_softc *ahd) |
1031 | { |
1032 | ahd_outb(ahd, SCSISIGO, ATNO); |
1033 | } |
1034 | |
1035 | /* |
1036 | * Determine if the current connection has a packetized |
1037 | * agreement. This does not necessarily mean that we |
1038 | * are currently in a packetized transfer. We could |
1039 | * just as easily be sending or receiving a message. |
1040 | */ |
1041 | static int |
1042 | ahd_currently_packetized(struct ahd_softc *ahd) |
1043 | { |
1044 | ahd_mode_state saved_modes; |
1045 | int packetized; |
1046 | |
1047 | saved_modes = ahd_save_modes(ahd); |
1048 | if ((ahd->bugs & AHD_PKTIZED_STATUS_BUG) != 0) { |
1049 | /* |
1050 | * The packetized bit refers to the last |
1051 | * connection, not the current one. Check |
1052 | * for non-zero LQISTATE instead. |
1053 | */ |
1054 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
1055 | packetized = ahd_inb(ahd, LQISTATE) != 0; |
1056 | } else { |
1057 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
1058 | packetized = ahd_inb(ahd, LQISTAT2) & PACKETIZED; |
1059 | } |
1060 | ahd_restore_modes(ahd, state: saved_modes); |
1061 | return (packetized); |
1062 | } |
1063 | |
1064 | static inline int |
1065 | ahd_set_active_fifo(struct ahd_softc *ahd) |
1066 | { |
1067 | u_int active_fifo; |
1068 | |
1069 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
1070 | active_fifo = ahd_inb(ahd, DFFSTAT) & CURRFIFO; |
1071 | switch (active_fifo) { |
1072 | case 0: |
1073 | case 1: |
1074 | ahd_set_modes(ahd, src: active_fifo, dst: active_fifo); |
1075 | return (1); |
1076 | default: |
1077 | return (0); |
1078 | } |
1079 | } |
1080 | |
1081 | static inline void |
1082 | ahd_unbusy_tcl(struct ahd_softc *ahd, u_int tcl) |
1083 | { |
1084 | ahd_busy_tcl(ahd, tcl, SCB_LIST_NULL); |
1085 | } |
1086 | |
1087 | /* |
1088 | * Determine whether the sequencer reported a residual |
1089 | * for this SCB/transaction. |
1090 | */ |
1091 | static inline void |
1092 | ahd_update_residual(struct ahd_softc *ahd, struct scb *scb) |
1093 | { |
1094 | uint32_t sgptr; |
1095 | |
1096 | sgptr = ahd_le32toh(scb->hscb->sgptr); |
1097 | if ((sgptr & SG_STATUS_VALID) != 0) |
1098 | ahd_calc_residual(ahd, scb); |
1099 | } |
1100 | |
1101 | static inline void |
1102 | ahd_complete_scb(struct ahd_softc *ahd, struct scb *scb) |
1103 | { |
1104 | uint32_t sgptr; |
1105 | |
1106 | sgptr = ahd_le32toh(scb->hscb->sgptr); |
1107 | if ((sgptr & SG_STATUS_VALID) != 0) |
1108 | ahd_handle_scb_status(ahd, scb); |
1109 | else |
1110 | ahd_done(ahd, scb); |
1111 | } |
1112 | |
1113 | |
1114 | /************************* Sequencer Execution Control ************************/ |
1115 | /* |
1116 | * Restart the sequencer program from address zero |
1117 | */ |
1118 | static void |
1119 | ahd_restart(struct ahd_softc *ahd) |
1120 | { |
1121 | |
1122 | ahd_pause(ahd); |
1123 | |
1124 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
1125 | |
1126 | /* No more pending messages */ |
1127 | ahd_clear_msg_state(ahd); |
1128 | ahd_outb(ahd, SCSISIGO, 0); /* De-assert BSY */ |
1129 | ahd_outb(ahd, MSG_OUT, NOP); /* No message to send */ |
1130 | ahd_outb(ahd, SXFRCTL1, ahd_inb(ahd, SXFRCTL1) & ~BITBUCKET); |
1131 | ahd_outb(ahd, SEQINTCTL, 0); |
1132 | ahd_outb(ahd, LASTPHASE, P_BUSFREE); |
1133 | ahd_outb(ahd, SEQ_FLAGS, 0); |
1134 | ahd_outb(ahd, SAVED_SCSIID, 0xFF); |
1135 | ahd_outb(ahd, SAVED_LUN, 0xFF); |
1136 | |
1137 | /* |
1138 | * Ensure that the sequencer's idea of TQINPOS |
1139 | * matches our own. The sequencer increments TQINPOS |
1140 | * only after it sees a DMA complete and a reset could |
1141 | * occur before the increment leaving the kernel to believe |
1142 | * the command arrived but the sequencer to not. |
1143 | */ |
1144 | ahd_outb(ahd, TQINPOS, ahd->tqinfifonext); |
1145 | |
1146 | /* Always allow reselection */ |
1147 | ahd_outb(ahd, SCSISEQ1, |
1148 | ahd_inb(ahd, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP)); |
1149 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
1150 | |
1151 | /* |
1152 | * Clear any pending sequencer interrupt. It is no |
1153 | * longer relevant since we're resetting the Program |
1154 | * Counter. |
1155 | */ |
1156 | ahd_outb(ahd, CLRINT, CLRSEQINT); |
1157 | |
1158 | ahd_outb(ahd, SEQCTL0, FASTMODE|SEQRESET); |
1159 | ahd_unpause(ahd); |
1160 | } |
1161 | |
1162 | static void |
1163 | ahd_clear_fifo(struct ahd_softc *ahd, u_int fifo) |
1164 | { |
1165 | ahd_mode_state saved_modes; |
1166 | |
1167 | #ifdef AHD_DEBUG |
1168 | if ((ahd_debug & AHD_SHOW_FIFOS) != 0) |
1169 | printk("%s: Clearing FIFO %d\n" , ahd_name(ahd), fifo); |
1170 | #endif |
1171 | saved_modes = ahd_save_modes(ahd); |
1172 | ahd_set_modes(ahd, src: fifo, dst: fifo); |
1173 | ahd_outb(ahd, DFFSXFRCTL, RSTCHN|CLRSHCNT); |
1174 | if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0) |
1175 | ahd_outb(ahd, CCSGCTL, CCSGRESET); |
1176 | ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR); |
1177 | ahd_outb(ahd, SG_STATE, 0); |
1178 | ahd_restore_modes(ahd, state: saved_modes); |
1179 | } |
1180 | |
1181 | /************************* Input/Output Queues ********************************/ |
1182 | /* |
1183 | * Flush and completed commands that are sitting in the command |
1184 | * complete queues down on the chip but have yet to be dma'ed back up. |
1185 | */ |
1186 | static void |
1187 | ahd_flush_qoutfifo(struct ahd_softc *ahd) |
1188 | { |
1189 | struct scb *scb; |
1190 | ahd_mode_state saved_modes; |
1191 | u_int saved_scbptr; |
1192 | u_int ccscbctl; |
1193 | u_int scbid; |
1194 | u_int next_scbid; |
1195 | |
1196 | saved_modes = ahd_save_modes(ahd); |
1197 | |
1198 | /* |
1199 | * Flush the good status FIFO for completed packetized commands. |
1200 | */ |
1201 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
1202 | saved_scbptr = ahd_get_scbptr(ahd); |
1203 | while ((ahd_inb(ahd, LQISTAT2) & LQIGSAVAIL) != 0) { |
1204 | u_int fifo_mode; |
1205 | u_int i; |
1206 | |
1207 | scbid = ahd_inw(ahd, GSFIFO); |
1208 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1209 | if (scb == NULL) { |
1210 | printk("%s: Warning - GSFIFO SCB %d invalid\n" , |
1211 | ahd_name(ahd), scbid); |
1212 | continue; |
1213 | } |
1214 | /* |
1215 | * Determine if this transaction is still active in |
1216 | * any FIFO. If it is, we must flush that FIFO to |
1217 | * the host before completing the command. |
1218 | */ |
1219 | fifo_mode = 0; |
1220 | rescan_fifos: |
1221 | for (i = 0; i < 2; i++) { |
1222 | /* Toggle to the other mode. */ |
1223 | fifo_mode ^= 1; |
1224 | ahd_set_modes(ahd, src: fifo_mode, dst: fifo_mode); |
1225 | |
1226 | if (ahd_scb_active_in_fifo(ahd, scb) == 0) |
1227 | continue; |
1228 | |
1229 | ahd_run_data_fifo(ahd, scb); |
1230 | |
1231 | /* |
1232 | * Running this FIFO may cause a CFG4DATA for |
1233 | * this same transaction to assert in the other |
1234 | * FIFO or a new snapshot SAVEPTRS interrupt |
1235 | * in this FIFO. Even running a FIFO may not |
1236 | * clear the transaction if we are still waiting |
1237 | * for data to drain to the host. We must loop |
1238 | * until the transaction is not active in either |
1239 | * FIFO just to be sure. Reset our loop counter |
1240 | * so we will visit both FIFOs again before |
1241 | * declaring this transaction finished. We |
1242 | * also delay a bit so that status has a chance |
1243 | * to change before we look at this FIFO again. |
1244 | */ |
1245 | ahd_delay(200); |
1246 | goto rescan_fifos; |
1247 | } |
1248 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
1249 | ahd_set_scbptr(ahd, scbptr: scbid); |
1250 | if ((ahd_inb_scbram(ahd, SCB_SGPTR) & SG_LIST_NULL) == 0 |
1251 | && ((ahd_inb_scbram(ahd, SCB_SGPTR) & SG_FULL_RESID) != 0 |
1252 | || (ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR) |
1253 | & SG_LIST_NULL) != 0)) { |
1254 | u_int comp_head; |
1255 | |
1256 | /* |
1257 | * The transfer completed with a residual. |
1258 | * Place this SCB on the complete DMA list |
1259 | * so that we update our in-core copy of the |
1260 | * SCB before completing the command. |
1261 | */ |
1262 | ahd_outb(ahd, SCB_SCSI_STATUS, 0); |
1263 | ahd_outb(ahd, SCB_SGPTR, |
1264 | ahd_inb_scbram(ahd, SCB_SGPTR) |
1265 | | SG_STATUS_VALID); |
1266 | ahd_outw(ahd, SCB_TAG, scbid); |
1267 | ahd_outw(ahd, SCB_NEXT_COMPLETE, SCB_LIST_NULL); |
1268 | comp_head = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD); |
1269 | if (SCBID_IS_NULL(comp_head)) { |
1270 | ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD, scbid); |
1271 | ahd_outw(ahd, COMPLETE_DMA_SCB_TAIL, scbid); |
1272 | } else { |
1273 | u_int tail; |
1274 | |
1275 | tail = ahd_inw(ahd, COMPLETE_DMA_SCB_TAIL); |
1276 | ahd_set_scbptr(ahd, scbptr: tail); |
1277 | ahd_outw(ahd, SCB_NEXT_COMPLETE, scbid); |
1278 | ahd_outw(ahd, COMPLETE_DMA_SCB_TAIL, scbid); |
1279 | ahd_set_scbptr(ahd, scbptr: scbid); |
1280 | } |
1281 | } else |
1282 | ahd_complete_scb(ahd, scb); |
1283 | } |
1284 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
1285 | |
1286 | /* |
1287 | * Setup for command channel portion of flush. |
1288 | */ |
1289 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
1290 | |
1291 | /* |
1292 | * Wait for any inprogress DMA to complete and clear DMA state |
1293 | * if this is for an SCB in the qinfifo. |
1294 | */ |
1295 | while (((ccscbctl = ahd_inb(ahd, CCSCBCTL)) & (CCARREN|CCSCBEN)) != 0) { |
1296 | |
1297 | if ((ccscbctl & (CCSCBDIR|CCARREN)) == (CCSCBDIR|CCARREN)) { |
1298 | if ((ccscbctl & ARRDONE) != 0) |
1299 | break; |
1300 | } else if ((ccscbctl & CCSCBDONE) != 0) |
1301 | break; |
1302 | ahd_delay(200); |
1303 | } |
1304 | /* |
1305 | * We leave the sequencer to cleanup in the case of DMA's to |
1306 | * update the qoutfifo. In all other cases (DMA's to the |
1307 | * chip or a push of an SCB from the COMPLETE_DMA_SCB list), |
1308 | * we disable the DMA engine so that the sequencer will not |
1309 | * attempt to handle the DMA completion. |
1310 | */ |
1311 | if ((ccscbctl & CCSCBDIR) != 0 || (ccscbctl & ARRDONE) != 0) |
1312 | ahd_outb(ahd, CCSCBCTL, ccscbctl & ~(CCARREN|CCSCBEN)); |
1313 | |
1314 | /* |
1315 | * Complete any SCBs that just finished |
1316 | * being DMA'ed into the qoutfifo. |
1317 | */ |
1318 | ahd_run_qoutfifo(ahd); |
1319 | |
1320 | saved_scbptr = ahd_get_scbptr(ahd); |
1321 | /* |
1322 | * Manually update/complete any completed SCBs that are waiting to be |
1323 | * DMA'ed back up to the host. |
1324 | */ |
1325 | scbid = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD); |
1326 | while (!SCBID_IS_NULL(scbid)) { |
1327 | uint8_t *hscb_ptr; |
1328 | u_int i; |
1329 | |
1330 | ahd_set_scbptr(ahd, scbptr: scbid); |
1331 | next_scbid = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
1332 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1333 | if (scb == NULL) { |
1334 | printk("%s: Warning - DMA-up and complete " |
1335 | "SCB %d invalid\n" , ahd_name(ahd), scbid); |
1336 | continue; |
1337 | } |
1338 | hscb_ptr = (uint8_t *)scb->hscb; |
1339 | for (i = 0; i < sizeof(struct hardware_scb); i++) |
1340 | *hscb_ptr++ = ahd_inb_scbram(ahd, SCB_BASE + i); |
1341 | |
1342 | ahd_complete_scb(ahd, scb); |
1343 | scbid = next_scbid; |
1344 | } |
1345 | ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD, SCB_LIST_NULL); |
1346 | ahd_outw(ahd, COMPLETE_DMA_SCB_TAIL, SCB_LIST_NULL); |
1347 | |
1348 | scbid = ahd_inw(ahd, COMPLETE_ON_QFREEZE_HEAD); |
1349 | while (!SCBID_IS_NULL(scbid)) { |
1350 | |
1351 | ahd_set_scbptr(ahd, scbptr: scbid); |
1352 | next_scbid = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
1353 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1354 | if (scb == NULL) { |
1355 | printk("%s: Warning - Complete Qfrz SCB %d invalid\n" , |
1356 | ahd_name(ahd), scbid); |
1357 | continue; |
1358 | } |
1359 | |
1360 | ahd_complete_scb(ahd, scb); |
1361 | scbid = next_scbid; |
1362 | } |
1363 | ahd_outw(ahd, COMPLETE_ON_QFREEZE_HEAD, SCB_LIST_NULL); |
1364 | |
1365 | scbid = ahd_inw(ahd, COMPLETE_SCB_HEAD); |
1366 | while (!SCBID_IS_NULL(scbid)) { |
1367 | |
1368 | ahd_set_scbptr(ahd, scbptr: scbid); |
1369 | next_scbid = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
1370 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1371 | if (scb == NULL) { |
1372 | printk("%s: Warning - Complete SCB %d invalid\n" , |
1373 | ahd_name(ahd), scbid); |
1374 | continue; |
1375 | } |
1376 | |
1377 | ahd_complete_scb(ahd, scb); |
1378 | scbid = next_scbid; |
1379 | } |
1380 | ahd_outw(ahd, COMPLETE_SCB_HEAD, SCB_LIST_NULL); |
1381 | |
1382 | /* |
1383 | * Restore state. |
1384 | */ |
1385 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
1386 | ahd_restore_modes(ahd, state: saved_modes); |
1387 | ahd->flags |= AHD_UPDATE_PEND_CMDS; |
1388 | } |
1389 | |
1390 | /* |
1391 | * Determine if an SCB for a packetized transaction |
1392 | * is active in a FIFO. |
1393 | */ |
1394 | static int |
1395 | ahd_scb_active_in_fifo(struct ahd_softc *ahd, struct scb *scb) |
1396 | { |
1397 | |
1398 | /* |
1399 | * The FIFO is only active for our transaction if |
1400 | * the SCBPTR matches the SCB's ID and the firmware |
1401 | * has installed a handler for the FIFO or we have |
1402 | * a pending SAVEPTRS or CFG4DATA interrupt. |
1403 | */ |
1404 | if (ahd_get_scbptr(ahd) != SCB_GET_TAG(scb) |
1405 | || ((ahd_inb(ahd, LONGJMP_ADDR+1) & INVALID_ADDR) != 0 |
1406 | && (ahd_inb(ahd, SEQINTSRC) & (CFG4DATA|SAVEPTRS)) == 0)) |
1407 | return (0); |
1408 | |
1409 | return (1); |
1410 | } |
1411 | |
1412 | /* |
1413 | * Run a data fifo to completion for a transaction we know |
1414 | * has completed across the SCSI bus (good status has been |
1415 | * received). We are already set to the correct FIFO mode |
1416 | * on entry to this routine. |
1417 | * |
1418 | * This function attempts to operate exactly as the firmware |
1419 | * would when running this FIFO. Care must be taken to update |
1420 | * this routine any time the firmware's FIFO algorithm is |
1421 | * changed. |
1422 | */ |
1423 | static void |
1424 | ahd_run_data_fifo(struct ahd_softc *ahd, struct scb *scb) |
1425 | { |
1426 | u_int seqintsrc; |
1427 | |
1428 | seqintsrc = ahd_inb(ahd, SEQINTSRC); |
1429 | if ((seqintsrc & CFG4DATA) != 0) { |
1430 | uint32_t datacnt; |
1431 | uint32_t sgptr; |
1432 | |
1433 | /* |
1434 | * Clear full residual flag. |
1435 | */ |
1436 | sgptr = ahd_inl_scbram(ahd, SCB_SGPTR) & ~SG_FULL_RESID; |
1437 | ahd_outb(ahd, SCB_SGPTR, sgptr); |
1438 | |
1439 | /* |
1440 | * Load datacnt and address. |
1441 | */ |
1442 | datacnt = ahd_inl_scbram(ahd, SCB_DATACNT); |
1443 | if ((datacnt & AHD_DMA_LAST_SEG) != 0) { |
1444 | sgptr |= LAST_SEG; |
1445 | ahd_outb(ahd, SG_STATE, 0); |
1446 | } else |
1447 | ahd_outb(ahd, SG_STATE, LOADING_NEEDED); |
1448 | ahd_outq(ahd, HADDR, ahd_inq_scbram(ahd, SCB_DATAPTR)); |
1449 | ahd_outl(ahd, HCNT, datacnt & AHD_SG_LEN_MASK); |
1450 | ahd_outb(ahd, SG_CACHE_PRE, sgptr); |
1451 | ahd_outb(ahd, DFCNTRL, PRELOADEN|SCSIEN|HDMAEN); |
1452 | |
1453 | /* |
1454 | * Initialize Residual Fields. |
1455 | */ |
1456 | ahd_outb(ahd, SCB_RESIDUAL_DATACNT+3, datacnt >> 24); |
1457 | ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr & SG_PTR_MASK); |
1458 | |
1459 | /* |
1460 | * Mark the SCB as having a FIFO in use. |
1461 | */ |
1462 | ahd_outb(ahd, SCB_FIFO_USE_COUNT, |
1463 | ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT) + 1); |
1464 | |
1465 | /* |
1466 | * Install a "fake" handler for this FIFO. |
1467 | */ |
1468 | ahd_outw(ahd, LONGJMP_ADDR, 0); |
1469 | |
1470 | /* |
1471 | * Notify the hardware that we have satisfied |
1472 | * this sequencer interrupt. |
1473 | */ |
1474 | ahd_outb(ahd, CLRSEQINTSRC, CLRCFG4DATA); |
1475 | } else if ((seqintsrc & SAVEPTRS) != 0) { |
1476 | uint32_t sgptr; |
1477 | uint32_t resid; |
1478 | |
1479 | if ((ahd_inb(ahd, LONGJMP_ADDR+1)&INVALID_ADDR) != 0) { |
1480 | /* |
1481 | * Snapshot Save Pointers. All that |
1482 | * is necessary to clear the snapshot |
1483 | * is a CLRCHN. |
1484 | */ |
1485 | goto clrchn; |
1486 | } |
1487 | |
1488 | /* |
1489 | * Disable S/G fetch so the DMA engine |
1490 | * is available to future users. |
1491 | */ |
1492 | if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0) |
1493 | ahd_outb(ahd, CCSGCTL, 0); |
1494 | ahd_outb(ahd, SG_STATE, 0); |
1495 | |
1496 | /* |
1497 | * Flush the data FIFO. Strickly only |
1498 | * necessary for Rev A parts. |
1499 | */ |
1500 | ahd_outb(ahd, DFCNTRL, ahd_inb(ahd, DFCNTRL) | FIFOFLUSH); |
1501 | |
1502 | /* |
1503 | * Calculate residual. |
1504 | */ |
1505 | sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR); |
1506 | resid = ahd_inl(ahd, SHCNT); |
1507 | resid |= ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT+3) << 24; |
1508 | ahd_outl(ahd, SCB_RESIDUAL_DATACNT, resid); |
1509 | if ((ahd_inb(ahd, SG_CACHE_SHADOW) & LAST_SEG) == 0) { |
1510 | /* |
1511 | * Must back up to the correct S/G element. |
1512 | * Typically this just means resetting our |
1513 | * low byte to the offset in the SG_CACHE, |
1514 | * but if we wrapped, we have to correct |
1515 | * the other bytes of the sgptr too. |
1516 | */ |
1517 | if ((ahd_inb(ahd, SG_CACHE_SHADOW) & 0x80) != 0 |
1518 | && (sgptr & 0x80) == 0) |
1519 | sgptr -= 0x100; |
1520 | sgptr &= ~0xFF; |
1521 | sgptr |= ahd_inb(ahd, SG_CACHE_SHADOW) |
1522 | & SG_ADDR_MASK; |
1523 | ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr); |
1524 | ahd_outb(ahd, SCB_RESIDUAL_DATACNT + 3, 0); |
1525 | } else if ((resid & AHD_SG_LEN_MASK) == 0) { |
1526 | ahd_outb(ahd, SCB_RESIDUAL_SGPTR, |
1527 | sgptr | SG_LIST_NULL); |
1528 | } |
1529 | /* |
1530 | * Save Pointers. |
1531 | */ |
1532 | ahd_outq(ahd, SCB_DATAPTR, ahd_inq(ahd, SHADDR)); |
1533 | ahd_outl(ahd, SCB_DATACNT, resid); |
1534 | ahd_outl(ahd, SCB_SGPTR, sgptr); |
1535 | ahd_outb(ahd, CLRSEQINTSRC, CLRSAVEPTRS); |
1536 | ahd_outb(ahd, SEQIMODE, |
1537 | ahd_inb(ahd, SEQIMODE) | ENSAVEPTRS); |
1538 | /* |
1539 | * If the data is to the SCSI bus, we are |
1540 | * done, otherwise wait for FIFOEMP. |
1541 | */ |
1542 | if ((ahd_inb(ahd, DFCNTRL) & DIRECTION) != 0) |
1543 | goto clrchn; |
1544 | } else if ((ahd_inb(ahd, SG_STATE) & LOADING_NEEDED) != 0) { |
1545 | uint32_t sgptr; |
1546 | uint64_t data_addr; |
1547 | uint32_t data_len; |
1548 | u_int dfcntrl; |
1549 | |
1550 | /* |
1551 | * Disable S/G fetch so the DMA engine |
1552 | * is available to future users. We won't |
1553 | * be using the DMA engine to load segments. |
1554 | */ |
1555 | if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0) { |
1556 | ahd_outb(ahd, CCSGCTL, 0); |
1557 | ahd_outb(ahd, SG_STATE, LOADING_NEEDED); |
1558 | } |
1559 | |
1560 | /* |
1561 | * Wait for the DMA engine to notice that the |
1562 | * host transfer is enabled and that there is |
1563 | * space in the S/G FIFO for new segments before |
1564 | * loading more segments. |
1565 | */ |
1566 | if ((ahd_inb(ahd, DFSTATUS) & PRELOAD_AVAIL) != 0 |
1567 | && (ahd_inb(ahd, DFCNTRL) & HDMAENACK) != 0) { |
1568 | |
1569 | /* |
1570 | * Determine the offset of the next S/G |
1571 | * element to load. |
1572 | */ |
1573 | sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR); |
1574 | sgptr &= SG_PTR_MASK; |
1575 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) { |
1576 | struct ahd_dma64_seg *sg; |
1577 | |
1578 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
1579 | data_addr = sg->addr; |
1580 | data_len = sg->len; |
1581 | sgptr += sizeof(*sg); |
1582 | } else { |
1583 | struct ahd_dma_seg *sg; |
1584 | |
1585 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
1586 | data_addr = sg->len & AHD_SG_HIGH_ADDR_MASK; |
1587 | data_addr <<= 8; |
1588 | data_addr |= sg->addr; |
1589 | data_len = sg->len; |
1590 | sgptr += sizeof(*sg); |
1591 | } |
1592 | |
1593 | /* |
1594 | * Update residual information. |
1595 | */ |
1596 | ahd_outb(ahd, SCB_RESIDUAL_DATACNT+3, data_len >> 24); |
1597 | ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr); |
1598 | |
1599 | /* |
1600 | * Load the S/G. |
1601 | */ |
1602 | if (data_len & AHD_DMA_LAST_SEG) { |
1603 | sgptr |= LAST_SEG; |
1604 | ahd_outb(ahd, SG_STATE, 0); |
1605 | } |
1606 | ahd_outq(ahd, HADDR, data_addr); |
1607 | ahd_outl(ahd, HCNT, data_len & AHD_SG_LEN_MASK); |
1608 | ahd_outb(ahd, SG_CACHE_PRE, sgptr & 0xFF); |
1609 | |
1610 | /* |
1611 | * Advertise the segment to the hardware. |
1612 | */ |
1613 | dfcntrl = ahd_inb(ahd, DFCNTRL)|PRELOADEN|HDMAEN; |
1614 | if ((ahd->features & AHD_NEW_DFCNTRL_OPTS) != 0) { |
1615 | /* |
1616 | * Use SCSIENWRDIS so that SCSIEN |
1617 | * is never modified by this |
1618 | * operation. |
1619 | */ |
1620 | dfcntrl |= SCSIENWRDIS; |
1621 | } |
1622 | ahd_outb(ahd, DFCNTRL, dfcntrl); |
1623 | } |
1624 | } else if ((ahd_inb(ahd, SG_CACHE_SHADOW) & LAST_SEG_DONE) != 0) { |
1625 | |
1626 | /* |
1627 | * Transfer completed to the end of SG list |
1628 | * and has flushed to the host. |
1629 | */ |
1630 | ahd_outb(ahd, SCB_SGPTR, |
1631 | ahd_inb_scbram(ahd, SCB_SGPTR) | SG_LIST_NULL); |
1632 | goto clrchn; |
1633 | } else if ((ahd_inb(ahd, DFSTATUS) & FIFOEMP) != 0) { |
1634 | clrchn: |
1635 | /* |
1636 | * Clear any handler for this FIFO, decrement |
1637 | * the FIFO use count for the SCB, and release |
1638 | * the FIFO. |
1639 | */ |
1640 | ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR); |
1641 | ahd_outb(ahd, SCB_FIFO_USE_COUNT, |
1642 | ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT) - 1); |
1643 | ahd_outb(ahd, DFFSXFRCTL, CLRCHN); |
1644 | } |
1645 | } |
1646 | |
1647 | /* |
1648 | * Look for entries in the QoutFIFO that have completed. |
1649 | * The valid_tag completion field indicates the validity |
1650 | * of the entry - the valid value toggles each time through |
1651 | * the queue. We use the sg_status field in the completion |
1652 | * entry to avoid referencing the hscb if the completion |
1653 | * occurred with no errors and no residual. sg_status is |
1654 | * a copy of the first byte (little endian) of the sgptr |
1655 | * hscb field. |
1656 | */ |
1657 | static void |
1658 | ahd_run_qoutfifo(struct ahd_softc *ahd) |
1659 | { |
1660 | struct ahd_completion *completion; |
1661 | struct scb *scb; |
1662 | u_int scb_index; |
1663 | |
1664 | if ((ahd->flags & AHD_RUNNING_QOUTFIFO) != 0) |
1665 | panic(fmt: "ahd_run_qoutfifo recursion" ); |
1666 | ahd->flags |= AHD_RUNNING_QOUTFIFO; |
1667 | ahd_sync_qoutfifo(ahd, BUS_DMASYNC_POSTREAD); |
1668 | for (;;) { |
1669 | completion = &ahd->qoutfifo[ahd->qoutfifonext]; |
1670 | |
1671 | if (completion->valid_tag != ahd->qoutfifonext_valid_tag) |
1672 | break; |
1673 | |
1674 | scb_index = ahd_le16toh(completion->tag); |
1675 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
1676 | if (scb == NULL) { |
1677 | printk("%s: WARNING no command for scb %d " |
1678 | "(cmdcmplt)\nQOUTPOS = %d\n" , |
1679 | ahd_name(ahd), scb_index, |
1680 | ahd->qoutfifonext); |
1681 | ahd_dump_card_state(ahd); |
1682 | } else if ((completion->sg_status & SG_STATUS_VALID) != 0) { |
1683 | ahd_handle_scb_status(ahd, scb); |
1684 | } else { |
1685 | ahd_done(ahd, scb); |
1686 | } |
1687 | |
1688 | ahd->qoutfifonext = (ahd->qoutfifonext+1) & (AHD_QOUT_SIZE-1); |
1689 | if (ahd->qoutfifonext == 0) |
1690 | ahd->qoutfifonext_valid_tag ^= QOUTFIFO_ENTRY_VALID; |
1691 | } |
1692 | ahd->flags &= ~AHD_RUNNING_QOUTFIFO; |
1693 | } |
1694 | |
1695 | /************************* Interrupt Handling *********************************/ |
1696 | static void |
1697 | ahd_handle_hwerrint(struct ahd_softc *ahd) |
1698 | { |
1699 | /* |
1700 | * Some catastrophic hardware error has occurred. |
1701 | * Print it for the user and disable the controller. |
1702 | */ |
1703 | int i; |
1704 | int error; |
1705 | |
1706 | error = ahd_inb(ahd, ERROR); |
1707 | for (i = 0; i < num_errors; i++) { |
1708 | if ((error & ahd_hard_errors[i].errno) != 0) |
1709 | printk("%s: hwerrint, %s\n" , |
1710 | ahd_name(ahd), ahd_hard_errors[i].errmesg); |
1711 | } |
1712 | |
1713 | ahd_dump_card_state(ahd); |
1714 | panic(fmt: "BRKADRINT" ); |
1715 | |
1716 | /* Tell everyone that this HBA is no longer available */ |
1717 | ahd_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, |
1718 | CAM_LUN_WILDCARD, SCB_LIST_NULL, role: ROLE_UNKNOWN, |
1719 | status: CAM_NO_HBA); |
1720 | |
1721 | /* Tell the system that this controller has gone away. */ |
1722 | ahd_free(ahd); |
1723 | } |
1724 | |
1725 | #ifdef AHD_DEBUG |
1726 | static void |
1727 | ahd_dump_sglist(struct scb *scb) |
1728 | { |
1729 | int i; |
1730 | |
1731 | if (scb->sg_count > 0) { |
1732 | if ((scb->ahd_softc->flags & AHD_64BIT_ADDRESSING) != 0) { |
1733 | struct ahd_dma64_seg *sg_list; |
1734 | |
1735 | sg_list = (struct ahd_dma64_seg*)scb->sg_list; |
1736 | for (i = 0; i < scb->sg_count; i++) { |
1737 | uint64_t addr; |
1738 | |
1739 | addr = ahd_le64toh(sg_list[i].addr); |
1740 | printk("sg[%d] - Addr 0x%x%x : Length %d%s\n" , |
1741 | i, |
1742 | (uint32_t)((addr >> 32) & 0xFFFFFFFF), |
1743 | (uint32_t)(addr & 0xFFFFFFFF), |
1744 | sg_list[i].len & AHD_SG_LEN_MASK, |
1745 | (sg_list[i].len & AHD_DMA_LAST_SEG) |
1746 | ? " Last" : "" ); |
1747 | } |
1748 | } else { |
1749 | struct ahd_dma_seg *sg_list; |
1750 | |
1751 | sg_list = (struct ahd_dma_seg*)scb->sg_list; |
1752 | for (i = 0; i < scb->sg_count; i++) { |
1753 | uint32_t len; |
1754 | |
1755 | len = ahd_le32toh(sg_list[i].len); |
1756 | printk("sg[%d] - Addr 0x%x%x : Length %d%s\n" , |
1757 | i, |
1758 | (len & AHD_SG_HIGH_ADDR_MASK) >> 24, |
1759 | ahd_le32toh(sg_list[i].addr), |
1760 | len & AHD_SG_LEN_MASK, |
1761 | len & AHD_DMA_LAST_SEG ? " Last" : "" ); |
1762 | } |
1763 | } |
1764 | } |
1765 | } |
1766 | #endif /* AHD_DEBUG */ |
1767 | |
1768 | static void |
1769 | ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat) |
1770 | { |
1771 | u_int seqintcode; |
1772 | |
1773 | /* |
1774 | * Save the sequencer interrupt code and clear the SEQINT |
1775 | * bit. We will unpause the sequencer, if appropriate, |
1776 | * after servicing the request. |
1777 | */ |
1778 | seqintcode = ahd_inb(ahd, SEQINTCODE); |
1779 | ahd_outb(ahd, CLRINT, CLRSEQINT); |
1780 | if ((ahd->bugs & AHD_INTCOLLISION_BUG) != 0) { |
1781 | /* |
1782 | * Unpause the sequencer and let it clear |
1783 | * SEQINT by writing NO_SEQINT to it. This |
1784 | * will cause the sequencer to be paused again, |
1785 | * which is the expected state of this routine. |
1786 | */ |
1787 | ahd_unpause(ahd); |
1788 | while (!ahd_is_paused(ahd)) |
1789 | ; |
1790 | ahd_outb(ahd, CLRINT, CLRSEQINT); |
1791 | } |
1792 | ahd_update_modes(ahd); |
1793 | #ifdef AHD_DEBUG |
1794 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
1795 | printk("%s: Handle Seqint Called for code %d\n" , |
1796 | ahd_name(ahd), seqintcode); |
1797 | #endif |
1798 | switch (seqintcode) { |
1799 | case ENTERING_NONPACK: |
1800 | { |
1801 | struct scb *scb; |
1802 | u_int scbid; |
1803 | |
1804 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
1805 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
1806 | scbid = ahd_get_scbptr(ahd); |
1807 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1808 | if (scb == NULL) { |
1809 | /* |
1810 | * Somehow need to know if this |
1811 | * is from a selection or reselection. |
1812 | * From that, we can determine target |
1813 | * ID so we at least have an I_T nexus. |
1814 | */ |
1815 | } else { |
1816 | ahd_outb(ahd, SAVED_SCSIID, scb->hscb->scsiid); |
1817 | ahd_outb(ahd, SAVED_LUN, scb->hscb->lun); |
1818 | ahd_outb(ahd, SEQ_FLAGS, 0x0); |
1819 | } |
1820 | if ((ahd_inb(ahd, LQISTAT2) & LQIPHASE_OUTPKT) != 0 |
1821 | && (ahd_inb(ahd, SCSISIGO) & ATNO) != 0) { |
1822 | /* |
1823 | * Phase change after read stream with |
1824 | * CRC error with P0 asserted on last |
1825 | * packet. |
1826 | */ |
1827 | #ifdef AHD_DEBUG |
1828 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) |
1829 | printk("%s: Assuming LQIPHASE_NLQ with " |
1830 | "P0 assertion\n" , ahd_name(ahd)); |
1831 | #endif |
1832 | } |
1833 | #ifdef AHD_DEBUG |
1834 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) |
1835 | printk("%s: Entering NONPACK\n" , ahd_name(ahd)); |
1836 | #endif |
1837 | break; |
1838 | } |
1839 | case INVALID_SEQINT: |
1840 | printk("%s: Invalid Sequencer interrupt occurred, " |
1841 | "resetting channel.\n" , |
1842 | ahd_name(ahd)); |
1843 | #ifdef AHD_DEBUG |
1844 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) |
1845 | ahd_dump_card_state(ahd); |
1846 | #endif |
1847 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
1848 | break; |
1849 | case STATUS_OVERRUN: |
1850 | { |
1851 | struct scb *scb; |
1852 | u_int scbid; |
1853 | |
1854 | scbid = ahd_get_scbptr(ahd); |
1855 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1856 | if (scb != NULL) |
1857 | ahd_print_path(ahd, scb); |
1858 | else |
1859 | printk("%s: " , ahd_name(ahd)); |
1860 | printk("SCB %d Packetized Status Overrun" , scbid); |
1861 | ahd_dump_card_state(ahd); |
1862 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
1863 | break; |
1864 | } |
1865 | case CFG4ISTAT_INTR: |
1866 | { |
1867 | struct scb *scb; |
1868 | u_int scbid; |
1869 | |
1870 | scbid = ahd_get_scbptr(ahd); |
1871 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1872 | if (scb == NULL) { |
1873 | ahd_dump_card_state(ahd); |
1874 | printk("CFG4ISTAT: Free SCB %d referenced" , scbid); |
1875 | panic(fmt: "For safety" ); |
1876 | } |
1877 | ahd_outq(ahd, HADDR, scb->sense_busaddr); |
1878 | ahd_outw(ahd, HCNT, AHD_SENSE_BUFSIZE); |
1879 | ahd_outb(ahd, HCNT + 2, 0); |
1880 | ahd_outb(ahd, SG_CACHE_PRE, SG_LAST_SEG); |
1881 | ahd_outb(ahd, DFCNTRL, PRELOADEN|SCSIEN|HDMAEN); |
1882 | break; |
1883 | } |
1884 | case ILLEGAL_PHASE: |
1885 | { |
1886 | u_int bus_phase; |
1887 | |
1888 | bus_phase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK; |
1889 | printk("%s: ILLEGAL_PHASE 0x%x\n" , |
1890 | ahd_name(ahd), bus_phase); |
1891 | |
1892 | switch (bus_phase) { |
1893 | case P_DATAOUT: |
1894 | case P_DATAIN: |
1895 | case P_DATAOUT_DT: |
1896 | case P_DATAIN_DT: |
1897 | case P_MESGOUT: |
1898 | case P_STATUS: |
1899 | case P_MESGIN: |
1900 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
1901 | printk("%s: Issued Bus Reset.\n" , ahd_name(ahd)); |
1902 | break; |
1903 | case P_COMMAND: |
1904 | { |
1905 | struct ahd_devinfo devinfo; |
1906 | struct scb *scb; |
1907 | u_int scbid; |
1908 | |
1909 | /* |
1910 | * If a target takes us into the command phase |
1911 | * assume that it has been externally reset and |
1912 | * has thus lost our previous packetized negotiation |
1913 | * agreement. Since we have not sent an identify |
1914 | * message and may not have fully qualified the |
1915 | * connection, we change our command to TUR, assert |
1916 | * ATN and ABORT the task when we go to message in |
1917 | * phase. The OSM will see the REQUEUE_REQUEST |
1918 | * status and retry the command. |
1919 | */ |
1920 | scbid = ahd_get_scbptr(ahd); |
1921 | scb = ahd_lookup_scb(ahd, tag: scbid); |
1922 | if (scb == NULL) { |
1923 | printk("Invalid phase with no valid SCB. " |
1924 | "Resetting bus.\n" ); |
1925 | ahd_reset_channel(ahd, channel: 'A', |
1926 | /*Initiate Reset*/TRUE); |
1927 | break; |
1928 | } |
1929 | ahd_compile_devinfo(&devinfo, SCB_GET_OUR_ID(scb), |
1930 | SCB_GET_TARGET(ahd, scb), |
1931 | SCB_GET_LUN(scb), |
1932 | SCB_GET_CHANNEL(ahd, scb), |
1933 | ROLE_INITIATOR); |
1934 | ahd_set_width(ahd, devinfo: &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
1935 | AHD_TRANS_ACTIVE, /*paused*/TRUE); |
1936 | ahd_set_syncrate(ahd, devinfo: &devinfo, /*period*/0, |
1937 | /*offset*/0, /*ppr_options*/0, |
1938 | AHD_TRANS_ACTIVE, /*paused*/TRUE); |
1939 | /* Hand-craft TUR command */ |
1940 | ahd_outb(ahd, SCB_CDB_STORE, 0); |
1941 | ahd_outb(ahd, SCB_CDB_STORE+1, 0); |
1942 | ahd_outb(ahd, SCB_CDB_STORE+2, 0); |
1943 | ahd_outb(ahd, SCB_CDB_STORE+3, 0); |
1944 | ahd_outb(ahd, SCB_CDB_STORE+4, 0); |
1945 | ahd_outb(ahd, SCB_CDB_STORE+5, 0); |
1946 | ahd_outb(ahd, SCB_CDB_LEN, 6); |
1947 | scb->hscb->control &= ~(TAG_ENB|SCB_TAG_TYPE); |
1948 | scb->hscb->control |= MK_MESSAGE; |
1949 | ahd_outb(ahd, SCB_CONTROL, scb->hscb->control); |
1950 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
1951 | ahd_outb(ahd, SAVED_SCSIID, scb->hscb->scsiid); |
1952 | /* |
1953 | * The lun is 0, regardless of the SCB's lun |
1954 | * as we have not sent an identify message. |
1955 | */ |
1956 | ahd_outb(ahd, SAVED_LUN, 0); |
1957 | ahd_outb(ahd, SEQ_FLAGS, 0); |
1958 | ahd_assert_atn(ahd); |
1959 | scb->flags &= ~SCB_PACKETIZED; |
1960 | scb->flags |= SCB_ABORT|SCB_EXTERNAL_RESET; |
1961 | ahd_freeze_devq(ahd, scb); |
1962 | ahd_set_transaction_status(scb, status: CAM_REQUEUE_REQ); |
1963 | ahd_freeze_scb(scb); |
1964 | |
1965 | /* Notify XPT */ |
1966 | ahd_send_async(ahd, channel: devinfo.channel, target: devinfo.target, |
1967 | CAM_LUN_WILDCARD, AC_SENT_BDR); |
1968 | |
1969 | /* |
1970 | * Allow the sequencer to continue with |
1971 | * non-pack processing. |
1972 | */ |
1973 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
1974 | ahd_outb(ahd, CLRLQOINT1, CLRLQOPHACHGINPKT); |
1975 | if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) { |
1976 | ahd_outb(ahd, CLRLQOINT1, 0); |
1977 | } |
1978 | #ifdef AHD_DEBUG |
1979 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) { |
1980 | ahd_print_path(ahd, scb); |
1981 | printk("Unexpected command phase from " |
1982 | "packetized target\n" ); |
1983 | } |
1984 | #endif |
1985 | break; |
1986 | } |
1987 | } |
1988 | break; |
1989 | } |
1990 | case CFG4OVERRUN: |
1991 | { |
1992 | struct scb *scb; |
1993 | u_int scb_index; |
1994 | |
1995 | #ifdef AHD_DEBUG |
1996 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) { |
1997 | printk("%s: CFG4OVERRUN mode = %x\n" , ahd_name(ahd), |
1998 | ahd_inb(ahd, MODE_PTR)); |
1999 | } |
2000 | #endif |
2001 | scb_index = ahd_get_scbptr(ahd); |
2002 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
2003 | if (scb == NULL) { |
2004 | /* |
2005 | * Attempt to transfer to an SCB that is |
2006 | * not outstanding. |
2007 | */ |
2008 | ahd_assert_atn(ahd); |
2009 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
2010 | ahd->msgout_buf[0] = ABORT_TASK; |
2011 | ahd->msgout_len = 1; |
2012 | ahd->msgout_index = 0; |
2013 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
2014 | /* |
2015 | * Clear status received flag to prevent any |
2016 | * attempt to complete this bogus SCB. |
2017 | */ |
2018 | ahd_outb(ahd, SCB_CONTROL, |
2019 | ahd_inb_scbram(ahd, SCB_CONTROL) |
2020 | & ~STATUS_RCVD); |
2021 | } |
2022 | break; |
2023 | } |
2024 | case DUMP_CARD_STATE: |
2025 | { |
2026 | ahd_dump_card_state(ahd); |
2027 | break; |
2028 | } |
2029 | case PDATA_REINIT: |
2030 | { |
2031 | #ifdef AHD_DEBUG |
2032 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) { |
2033 | printk("%s: PDATA_REINIT - DFCNTRL = 0x%x " |
2034 | "SG_CACHE_SHADOW = 0x%x\n" , |
2035 | ahd_name(ahd), ahd_inb(ahd, DFCNTRL), |
2036 | ahd_inb(ahd, SG_CACHE_SHADOW)); |
2037 | } |
2038 | #endif |
2039 | ahd_reinitialize_dataptrs(ahd); |
2040 | break; |
2041 | } |
2042 | case HOST_MSG_LOOP: |
2043 | { |
2044 | struct ahd_devinfo devinfo; |
2045 | |
2046 | /* |
2047 | * The sequencer has encountered a message phase |
2048 | * that requires host assistance for completion. |
2049 | * While handling the message phase(s), we will be |
2050 | * notified by the sequencer after each byte is |
2051 | * transferred so we can track bus phase changes. |
2052 | * |
2053 | * If this is the first time we've seen a HOST_MSG_LOOP |
2054 | * interrupt, initialize the state of the host message |
2055 | * loop. |
2056 | */ |
2057 | ahd_fetch_devinfo(ahd, devinfo: &devinfo); |
2058 | if (ahd->msg_type == MSG_TYPE_NONE) { |
2059 | struct scb *scb; |
2060 | u_int scb_index; |
2061 | u_int bus_phase; |
2062 | |
2063 | bus_phase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK; |
2064 | if (bus_phase != P_MESGIN |
2065 | && bus_phase != P_MESGOUT) { |
2066 | printk("ahd_intr: HOST_MSG_LOOP bad " |
2067 | "phase 0x%x\n" , bus_phase); |
2068 | /* |
2069 | * Probably transitioned to bus free before |
2070 | * we got here. Just punt the message. |
2071 | */ |
2072 | ahd_dump_card_state(ahd); |
2073 | ahd_clear_intstat(ahd); |
2074 | ahd_restart(ahd); |
2075 | return; |
2076 | } |
2077 | |
2078 | scb_index = ahd_get_scbptr(ahd); |
2079 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
2080 | if (devinfo.role == ROLE_INITIATOR) { |
2081 | if (bus_phase == P_MESGOUT) |
2082 | ahd_setup_initiator_msgout(ahd, |
2083 | devinfo: &devinfo, |
2084 | scb); |
2085 | else { |
2086 | ahd->msg_type = |
2087 | MSG_TYPE_INITIATOR_MSGIN; |
2088 | ahd->msgin_index = 0; |
2089 | } |
2090 | } |
2091 | #ifdef AHD_TARGET_MODE |
2092 | else { |
2093 | if (bus_phase == P_MESGOUT) { |
2094 | ahd->msg_type = |
2095 | MSG_TYPE_TARGET_MSGOUT; |
2096 | ahd->msgin_index = 0; |
2097 | } else |
2098 | ahd_setup_target_msgin(ahd, |
2099 | &devinfo, |
2100 | scb); |
2101 | } |
2102 | #endif |
2103 | } |
2104 | |
2105 | ahd_handle_message_phase(ahd); |
2106 | break; |
2107 | } |
2108 | case NO_MATCH: |
2109 | { |
2110 | /* Ensure we don't leave the selection hardware on */ |
2111 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
2112 | ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO); |
2113 | |
2114 | printk("%s:%c:%d: no active SCB for reconnecting " |
2115 | "target - issuing BUS DEVICE RESET\n" , |
2116 | ahd_name(ahd), 'A', ahd_inb(ahd, SELID) >> 4); |
2117 | printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " |
2118 | "REG0 == 0x%x ACCUM = 0x%x\n" , |
2119 | ahd_inb(ahd, SAVED_SCSIID), ahd_inb(ahd, SAVED_LUN), |
2120 | ahd_inw(ahd, REG0), ahd_inb(ahd, ACCUM)); |
2121 | printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " |
2122 | "SINDEX == 0x%x\n" , |
2123 | ahd_inb(ahd, SEQ_FLAGS), ahd_get_scbptr(ahd), |
2124 | ahd_find_busy_tcl(ahd, |
2125 | BUILD_TCL(ahd_inb(ahd, SAVED_SCSIID), |
2126 | ahd_inb(ahd, SAVED_LUN))), |
2127 | ahd_inw(ahd, SINDEX)); |
2128 | printk("SELID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " |
2129 | "SCB_CONTROL == 0x%x\n" , |
2130 | ahd_inb(ahd, SELID), ahd_inb_scbram(ahd, SCB_SCSIID), |
2131 | ahd_inb_scbram(ahd, SCB_LUN), |
2132 | ahd_inb_scbram(ahd, SCB_CONTROL)); |
2133 | printk("SCSIBUS[0] == 0x%x, SCSISIGI == 0x%x\n" , |
2134 | ahd_inb(ahd, SCSIBUS), ahd_inb(ahd, SCSISIGI)); |
2135 | printk("SXFRCTL0 == 0x%x\n" , ahd_inb(ahd, SXFRCTL0)); |
2136 | printk("SEQCTL0 == 0x%x\n" , ahd_inb(ahd, SEQCTL0)); |
2137 | ahd_dump_card_state(ahd); |
2138 | ahd->msgout_buf[0] = TARGET_RESET; |
2139 | ahd->msgout_len = 1; |
2140 | ahd->msgout_index = 0; |
2141 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
2142 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
2143 | ahd_assert_atn(ahd); |
2144 | break; |
2145 | } |
2146 | case PROTO_VIOLATION: |
2147 | { |
2148 | ahd_handle_proto_violation(ahd); |
2149 | break; |
2150 | } |
2151 | case IGN_WIDE_RES: |
2152 | { |
2153 | struct ahd_devinfo devinfo; |
2154 | |
2155 | ahd_fetch_devinfo(ahd, devinfo: &devinfo); |
2156 | ahd_handle_ign_wide_residue(ahd, devinfo: &devinfo); |
2157 | break; |
2158 | } |
2159 | case BAD_PHASE: |
2160 | { |
2161 | u_int lastphase; |
2162 | |
2163 | lastphase = ahd_inb(ahd, LASTPHASE); |
2164 | printk("%s:%c:%d: unknown scsi bus phase %x, " |
2165 | "lastphase = 0x%x. Attempting to continue\n" , |
2166 | ahd_name(ahd), 'A', |
2167 | SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)), |
2168 | lastphase, ahd_inb(ahd, SCSISIGI)); |
2169 | break; |
2170 | } |
2171 | case MISSED_BUSFREE: |
2172 | { |
2173 | u_int lastphase; |
2174 | |
2175 | lastphase = ahd_inb(ahd, LASTPHASE); |
2176 | printk("%s:%c:%d: Missed busfree. " |
2177 | "Lastphase = 0x%x, Curphase = 0x%x\n" , |
2178 | ahd_name(ahd), 'A', |
2179 | SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)), |
2180 | lastphase, ahd_inb(ahd, SCSISIGI)); |
2181 | ahd_restart(ahd); |
2182 | return; |
2183 | } |
2184 | case DATA_OVERRUN: |
2185 | { |
2186 | /* |
2187 | * When the sequencer detects an overrun, it |
2188 | * places the controller in "BITBUCKET" mode |
2189 | * and allows the target to complete its transfer. |
2190 | * Unfortunately, none of the counters get updated |
2191 | * when the controller is in this mode, so we have |
2192 | * no way of knowing how large the overrun was. |
2193 | */ |
2194 | struct scb *scb; |
2195 | u_int scbindex; |
2196 | #ifdef AHD_DEBUG |
2197 | u_int lastphase; |
2198 | #endif |
2199 | |
2200 | scbindex = ahd_get_scbptr(ahd); |
2201 | scb = ahd_lookup_scb(ahd, tag: scbindex); |
2202 | #ifdef AHD_DEBUG |
2203 | lastphase = ahd_inb(ahd, LASTPHASE); |
2204 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) { |
2205 | ahd_print_path(ahd, scb); |
2206 | printk("data overrun detected %s. Tag == 0x%x.\n" , |
2207 | ahd_lookup_phase_entry(lastphase)->phasemsg, |
2208 | SCB_GET_TAG(scb)); |
2209 | ahd_print_path(ahd, scb); |
2210 | printk("%s seen Data Phase. Length = %ld. " |
2211 | "NumSGs = %d.\n" , |
2212 | ahd_inb(ahd, SEQ_FLAGS) & DPHASE |
2213 | ? "Have" : "Haven't" , |
2214 | ahd_get_transfer_length(scb), scb->sg_count); |
2215 | ahd_dump_sglist(scb); |
2216 | } |
2217 | #endif |
2218 | |
2219 | /* |
2220 | * Set this and it will take effect when the |
2221 | * target does a command complete. |
2222 | */ |
2223 | ahd_freeze_devq(ahd, scb); |
2224 | ahd_set_transaction_status(scb, status: CAM_DATA_RUN_ERR); |
2225 | ahd_freeze_scb(scb); |
2226 | break; |
2227 | } |
2228 | case MKMSG_FAILED: |
2229 | { |
2230 | struct ahd_devinfo devinfo; |
2231 | struct scb *scb; |
2232 | u_int scbid; |
2233 | |
2234 | ahd_fetch_devinfo(ahd, devinfo: &devinfo); |
2235 | printk("%s:%c:%d:%d: Attempt to issue message failed\n" , |
2236 | ahd_name(ahd), devinfo.channel, devinfo.target, |
2237 | devinfo.lun); |
2238 | scbid = ahd_get_scbptr(ahd); |
2239 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2240 | if (scb != NULL |
2241 | && (scb->flags & SCB_RECOVERY_SCB) != 0) |
2242 | /* |
2243 | * Ensure that we didn't put a second instance of this |
2244 | * SCB into the QINFIFO. |
2245 | */ |
2246 | ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb), |
2247 | SCB_GET_CHANNEL(ahd, scb), |
2248 | SCB_GET_LUN(scb), SCB_GET_TAG(scb), |
2249 | ROLE_INITIATOR, /*status*/0, |
2250 | SEARCH_REMOVE); |
2251 | ahd_outb(ahd, SCB_CONTROL, |
2252 | ahd_inb_scbram(ahd, SCB_CONTROL) & ~MK_MESSAGE); |
2253 | break; |
2254 | } |
2255 | case TASKMGMT_FUNC_COMPLETE: |
2256 | { |
2257 | u_int scbid; |
2258 | struct scb *scb; |
2259 | |
2260 | scbid = ahd_get_scbptr(ahd); |
2261 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2262 | if (scb != NULL) { |
2263 | u_int lun; |
2264 | u_int tag; |
2265 | cam_status error; |
2266 | |
2267 | ahd_print_path(ahd, scb); |
2268 | printk("Task Management Func 0x%x Complete\n" , |
2269 | scb->hscb->task_management); |
2270 | lun = CAM_LUN_WILDCARD; |
2271 | tag = SCB_LIST_NULL; |
2272 | |
2273 | switch (scb->hscb->task_management) { |
2274 | case SIU_TASKMGMT_ABORT_TASK: |
2275 | tag = SCB_GET_TAG(scb); |
2276 | fallthrough; |
2277 | case SIU_TASKMGMT_ABORT_TASK_SET: |
2278 | case SIU_TASKMGMT_CLEAR_TASK_SET: |
2279 | lun = scb->hscb->lun; |
2280 | error = CAM_REQ_ABORTED; |
2281 | ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), |
2282 | 'A', lun, tag, ROLE_INITIATOR, |
2283 | error); |
2284 | break; |
2285 | case SIU_TASKMGMT_LUN_RESET: |
2286 | lun = scb->hscb->lun; |
2287 | fallthrough; |
2288 | case SIU_TASKMGMT_TARGET_RESET: |
2289 | { |
2290 | struct ahd_devinfo devinfo; |
2291 | |
2292 | ahd_scb_devinfo(ahd, devinfo: &devinfo, scb); |
2293 | error = CAM_BDR_SENT; |
2294 | ahd_handle_devreset(ahd, devinfo: &devinfo, lun, |
2295 | status: CAM_BDR_SENT, |
2296 | message: lun != CAM_LUN_WILDCARD |
2297 | ? "Lun Reset" |
2298 | : "Target Reset" , |
2299 | /*verbose_level*/0); |
2300 | break; |
2301 | } |
2302 | default: |
2303 | panic(fmt: "Unexpected TaskMgmt Func\n" ); |
2304 | break; |
2305 | } |
2306 | } |
2307 | break; |
2308 | } |
2309 | case TASKMGMT_CMD_CMPLT_OKAY: |
2310 | { |
2311 | u_int scbid; |
2312 | struct scb *scb; |
2313 | |
2314 | /* |
2315 | * An ABORT TASK TMF failed to be delivered before |
2316 | * the targeted command completed normally. |
2317 | */ |
2318 | scbid = ahd_get_scbptr(ahd); |
2319 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2320 | if (scb != NULL) { |
2321 | /* |
2322 | * Remove the second instance of this SCB from |
2323 | * the QINFIFO if it is still there. |
2324 | */ |
2325 | ahd_print_path(ahd, scb); |
2326 | printk("SCB completes before TMF\n" ); |
2327 | /* |
2328 | * Handle losing the race. Wait until any |
2329 | * current selection completes. We will then |
2330 | * set the TMF back to zero in this SCB so that |
2331 | * the sequencer doesn't bother to issue another |
2332 | * sequencer interrupt for its completion. |
2333 | */ |
2334 | while ((ahd_inb(ahd, SCSISEQ0) & ENSELO) != 0 |
2335 | && (ahd_inb(ahd, SSTAT0) & SELDO) == 0 |
2336 | && (ahd_inb(ahd, SSTAT1) & SELTO) == 0) |
2337 | ; |
2338 | ahd_outb(ahd, SCB_TASK_MANAGEMENT, 0); |
2339 | ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb), |
2340 | SCB_GET_CHANNEL(ahd, scb), |
2341 | SCB_GET_LUN(scb), SCB_GET_TAG(scb), |
2342 | ROLE_INITIATOR, /*status*/0, |
2343 | SEARCH_REMOVE); |
2344 | } |
2345 | break; |
2346 | } |
2347 | case TRACEPOINT0: |
2348 | case TRACEPOINT1: |
2349 | case TRACEPOINT2: |
2350 | case TRACEPOINT3: |
2351 | printk("%s: Tracepoint %d\n" , ahd_name(ahd), |
2352 | seqintcode - TRACEPOINT0); |
2353 | break; |
2354 | case NO_SEQINT: |
2355 | break; |
2356 | case SAW_HWERR: |
2357 | ahd_handle_hwerrint(ahd); |
2358 | break; |
2359 | default: |
2360 | printk("%s: Unexpected SEQINTCODE %d\n" , ahd_name(ahd), |
2361 | seqintcode); |
2362 | break; |
2363 | } |
2364 | /* |
2365 | * The sequencer is paused immediately on |
2366 | * a SEQINT, so we should restart it when |
2367 | * we're done. |
2368 | */ |
2369 | ahd_unpause(ahd); |
2370 | } |
2371 | |
2372 | static void |
2373 | ahd_handle_scsiint(struct ahd_softc *ahd, u_int intstat) |
2374 | { |
2375 | struct scb *scb; |
2376 | u_int status0; |
2377 | u_int status3; |
2378 | u_int status; |
2379 | u_int lqistat1; |
2380 | u_int lqostat0; |
2381 | u_int scbid; |
2382 | u_int busfreetime; |
2383 | |
2384 | ahd_update_modes(ahd); |
2385 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2386 | |
2387 | status3 = ahd_inb(ahd, SSTAT3) & (NTRAMPERR|OSRAMPERR); |
2388 | status0 = ahd_inb(ahd, SSTAT0) & (IOERR|OVERRUN|SELDI|SELDO); |
2389 | status = ahd_inb(ahd, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); |
2390 | lqistat1 = ahd_inb(ahd, LQISTAT1); |
2391 | lqostat0 = ahd_inb(ahd, LQOSTAT0); |
2392 | busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME; |
2393 | |
2394 | /* |
2395 | * Ignore external resets after a bus reset. |
2396 | */ |
2397 | if (((status & SCSIRSTI) != 0) && (ahd->flags & AHD_BUS_RESET_ACTIVE)) { |
2398 | ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI); |
2399 | return; |
2400 | } |
2401 | |
2402 | /* |
2403 | * Clear bus reset flag |
2404 | */ |
2405 | ahd->flags &= ~AHD_BUS_RESET_ACTIVE; |
2406 | |
2407 | if ((status0 & (SELDI|SELDO)) != 0) { |
2408 | u_int simode0; |
2409 | |
2410 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
2411 | simode0 = ahd_inb(ahd, SIMODE0); |
2412 | status0 &= simode0 & (IOERR|OVERRUN|SELDI|SELDO); |
2413 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2414 | } |
2415 | scbid = ahd_get_scbptr(ahd); |
2416 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2417 | if (scb != NULL |
2418 | && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) |
2419 | scb = NULL; |
2420 | |
2421 | if ((status0 & IOERR) != 0) { |
2422 | u_int now_lvd; |
2423 | |
2424 | now_lvd = ahd_inb(ahd, SBLKCTL) & ENAB40; |
2425 | printk("%s: Transceiver State Has Changed to %s mode\n" , |
2426 | ahd_name(ahd), now_lvd ? "LVD" : "SE" ); |
2427 | ahd_outb(ahd, CLRSINT0, CLRIOERR); |
2428 | /* |
2429 | * A change in I/O mode is equivalent to a bus reset. |
2430 | */ |
2431 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2432 | ahd_pause(ahd); |
2433 | ahd_setup_iocell_workaround(ahd); |
2434 | ahd_unpause(ahd); |
2435 | } else if ((status0 & OVERRUN) != 0) { |
2436 | |
2437 | printk("%s: SCSI offset overrun detected. Resetting bus.\n" , |
2438 | ahd_name(ahd)); |
2439 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2440 | } else if ((status & SCSIRSTI) != 0) { |
2441 | |
2442 | printk("%s: Someone reset channel A\n" , ahd_name(ahd)); |
2443 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/FALSE); |
2444 | } else if ((status & SCSIPERR) != 0) { |
2445 | |
2446 | /* Make sure the sequencer is in a safe location. */ |
2447 | ahd_clear_critical_section(ahd); |
2448 | |
2449 | ahd_handle_transmission_error(ahd); |
2450 | } else if (lqostat0 != 0) { |
2451 | |
2452 | printk("%s: lqostat0 == 0x%x!\n" , ahd_name(ahd), lqostat0); |
2453 | ahd_outb(ahd, CLRLQOINT0, lqostat0); |
2454 | if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) |
2455 | ahd_outb(ahd, CLRLQOINT1, 0); |
2456 | } else if ((status & SELTO) != 0) { |
2457 | /* Stop the selection */ |
2458 | ahd_outb(ahd, SCSISEQ0, 0); |
2459 | |
2460 | /* Make sure the sequencer is in a safe location. */ |
2461 | ahd_clear_critical_section(ahd); |
2462 | |
2463 | /* No more pending messages */ |
2464 | ahd_clear_msg_state(ahd); |
2465 | |
2466 | /* Clear interrupt state */ |
2467 | ahd_outb(ahd, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); |
2468 | |
2469 | /* |
2470 | * Although the driver does not care about the |
2471 | * 'Selection in Progress' status bit, the busy |
2472 | * LED does. SELINGO is only cleared by a successful |
2473 | * selection, so we must manually clear it to insure |
2474 | * the LED turns off just incase no future successful |
2475 | * selections occur (e.g. no devices on the bus). |
2476 | */ |
2477 | ahd_outb(ahd, CLRSINT0, CLRSELINGO); |
2478 | |
2479 | scbid = ahd_inw(ahd, WAITING_TID_HEAD); |
2480 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2481 | if (scb == NULL) { |
2482 | printk("%s: ahd_intr - referenced scb not " |
2483 | "valid during SELTO scb(0x%x)\n" , |
2484 | ahd_name(ahd), scbid); |
2485 | ahd_dump_card_state(ahd); |
2486 | } else { |
2487 | struct ahd_devinfo devinfo; |
2488 | #ifdef AHD_DEBUG |
2489 | if ((ahd_debug & AHD_SHOW_SELTO) != 0) { |
2490 | ahd_print_path(ahd, scb); |
2491 | printk("Saw Selection Timeout for SCB 0x%x\n" , |
2492 | scbid); |
2493 | } |
2494 | #endif |
2495 | ahd_scb_devinfo(ahd, devinfo: &devinfo, scb); |
2496 | ahd_set_transaction_status(scb, status: CAM_SEL_TIMEOUT); |
2497 | ahd_freeze_devq(ahd, scb); |
2498 | |
2499 | /* |
2500 | * Cancel any pending transactions on the device |
2501 | * now that it seems to be missing. This will |
2502 | * also revert us to async/narrow transfers until |
2503 | * we can renegotiate with the device. |
2504 | */ |
2505 | ahd_handle_devreset(ahd, devinfo: &devinfo, |
2506 | CAM_LUN_WILDCARD, |
2507 | status: CAM_SEL_TIMEOUT, |
2508 | message: "Selection Timeout" , |
2509 | /*verbose_level*/1); |
2510 | } |
2511 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
2512 | ahd_iocell_first_selection(ahd); |
2513 | ahd_unpause(ahd); |
2514 | } else if ((status0 & (SELDI|SELDO)) != 0) { |
2515 | |
2516 | ahd_iocell_first_selection(ahd); |
2517 | ahd_unpause(ahd); |
2518 | } else if (status3 != 0) { |
2519 | printk("%s: SCSI Cell parity error SSTAT3 == 0x%x\n" , |
2520 | ahd_name(ahd), status3); |
2521 | ahd_outb(ahd, CLRSINT3, status3); |
2522 | } else if ((lqistat1 & (LQIPHASE_LQ|LQIPHASE_NLQ)) != 0) { |
2523 | |
2524 | /* Make sure the sequencer is in a safe location. */ |
2525 | ahd_clear_critical_section(ahd); |
2526 | |
2527 | ahd_handle_lqiphase_error(ahd, lqistat1); |
2528 | } else if ((lqistat1 & LQICRCI_NLQ) != 0) { |
2529 | /* |
2530 | * This status can be delayed during some |
2531 | * streaming operations. The SCSIPHASE |
2532 | * handler has already dealt with this case |
2533 | * so just clear the error. |
2534 | */ |
2535 | ahd_outb(ahd, CLRLQIINT1, CLRLQICRCI_NLQ); |
2536 | } else if ((status & BUSFREE) != 0 |
2537 | || (lqistat1 & LQOBUSFREE) != 0) { |
2538 | u_int lqostat1; |
2539 | int restart; |
2540 | int clear_fifo; |
2541 | int packetized; |
2542 | u_int mode; |
2543 | |
2544 | /* |
2545 | * Clear our selection hardware as soon as possible. |
2546 | * We may have an entry in the waiting Q for this target, |
2547 | * that is affected by this busfree and we don't want to |
2548 | * go about selecting the target while we handle the event. |
2549 | */ |
2550 | ahd_outb(ahd, SCSISEQ0, 0); |
2551 | |
2552 | /* Make sure the sequencer is in a safe location. */ |
2553 | ahd_clear_critical_section(ahd); |
2554 | |
2555 | /* |
2556 | * Determine what we were up to at the time of |
2557 | * the busfree. |
2558 | */ |
2559 | mode = AHD_MODE_SCSI; |
2560 | busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME; |
2561 | lqostat1 = ahd_inb(ahd, LQOSTAT1); |
2562 | switch (busfreetime) { |
2563 | case BUSFREE_DFF0: |
2564 | case BUSFREE_DFF1: |
2565 | { |
2566 | mode = busfreetime == BUSFREE_DFF0 |
2567 | ? AHD_MODE_DFF0 : AHD_MODE_DFF1; |
2568 | ahd_set_modes(ahd, src: mode, dst: mode); |
2569 | scbid = ahd_get_scbptr(ahd); |
2570 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2571 | if (scb == NULL) { |
2572 | printk("%s: Invalid SCB %d in DFF%d " |
2573 | "during unexpected busfree\n" , |
2574 | ahd_name(ahd), scbid, mode); |
2575 | packetized = 0; |
2576 | } else |
2577 | packetized = (scb->flags & SCB_PACKETIZED) != 0; |
2578 | clear_fifo = 1; |
2579 | break; |
2580 | } |
2581 | case BUSFREE_LQO: |
2582 | clear_fifo = 0; |
2583 | packetized = 1; |
2584 | break; |
2585 | default: |
2586 | clear_fifo = 0; |
2587 | packetized = (lqostat1 & LQOBUSFREE) != 0; |
2588 | if (!packetized |
2589 | && ahd_inb(ahd, LASTPHASE) == P_BUSFREE |
2590 | && (ahd_inb(ahd, SSTAT0) & SELDI) == 0 |
2591 | && ((ahd_inb(ahd, SSTAT0) & SELDO) == 0 |
2592 | || (ahd_inb(ahd, SCSISEQ0) & ENSELO) == 0)) |
2593 | /* |
2594 | * Assume packetized if we are not |
2595 | * on the bus in a non-packetized |
2596 | * capacity and any pending selection |
2597 | * was a packetized selection. |
2598 | */ |
2599 | packetized = 1; |
2600 | break; |
2601 | } |
2602 | |
2603 | #ifdef AHD_DEBUG |
2604 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
2605 | printk("Saw Busfree. Busfreetime = 0x%x.\n" , |
2606 | busfreetime); |
2607 | #endif |
2608 | /* |
2609 | * Busfrees that occur in non-packetized phases are |
2610 | * handled by the nonpkt_busfree handler. |
2611 | */ |
2612 | if (packetized && ahd_inb(ahd, LASTPHASE) == P_BUSFREE) { |
2613 | restart = ahd_handle_pkt_busfree(ahd, busfreetime); |
2614 | } else { |
2615 | packetized = 0; |
2616 | restart = ahd_handle_nonpkt_busfree(ahd); |
2617 | } |
2618 | /* |
2619 | * Clear the busfree interrupt status. The setting of |
2620 | * the interrupt is a pulse, so in a perfect world, we |
2621 | * would not need to muck with the ENBUSFREE logic. This |
2622 | * would ensure that if the bus moves on to another |
2623 | * connection, busfree protection is still in force. If |
2624 | * BUSFREEREV is broken, however, we must manually clear |
2625 | * the ENBUSFREE if the busfree occurred during a non-pack |
2626 | * connection so that we don't get false positives during |
2627 | * future, packetized, connections. |
2628 | */ |
2629 | ahd_outb(ahd, CLRSINT1, CLRBUSFREE); |
2630 | if (packetized == 0 |
2631 | && (ahd->bugs & AHD_BUSFREEREV_BUG) != 0) |
2632 | ahd_outb(ahd, SIMODE1, |
2633 | ahd_inb(ahd, SIMODE1) & ~ENBUSFREE); |
2634 | |
2635 | if (clear_fifo) |
2636 | ahd_clear_fifo(ahd, fifo: mode); |
2637 | |
2638 | ahd_clear_msg_state(ahd); |
2639 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
2640 | if (restart) { |
2641 | ahd_restart(ahd); |
2642 | } else { |
2643 | ahd_unpause(ahd); |
2644 | } |
2645 | } else { |
2646 | printk("%s: Missing case in ahd_handle_scsiint. status = %x\n" , |
2647 | ahd_name(ahd), status); |
2648 | ahd_dump_card_state(ahd); |
2649 | ahd_clear_intstat(ahd); |
2650 | ahd_unpause(ahd); |
2651 | } |
2652 | } |
2653 | |
2654 | static void |
2655 | ahd_handle_transmission_error(struct ahd_softc *ahd) |
2656 | { |
2657 | struct scb *scb; |
2658 | u_int scbid; |
2659 | u_int lqistat1; |
2660 | u_int msg_out; |
2661 | u_int curphase; |
2662 | u_int lastphase; |
2663 | u_int perrdiag; |
2664 | u_int cur_col; |
2665 | int silent; |
2666 | |
2667 | scb = NULL; |
2668 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2669 | lqistat1 = ahd_inb(ahd, LQISTAT1) & ~(LQIPHASE_LQ|LQIPHASE_NLQ); |
2670 | ahd_inb(ahd, LQISTAT2); |
2671 | if ((lqistat1 & (LQICRCI_NLQ|LQICRCI_LQ)) == 0 |
2672 | && (ahd->bugs & AHD_NLQICRC_DELAYED_BUG) != 0) { |
2673 | u_int lqistate; |
2674 | |
2675 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
2676 | lqistate = ahd_inb(ahd, LQISTATE); |
2677 | if ((lqistate >= 0x1E && lqistate <= 0x24) |
2678 | || (lqistate == 0x29)) { |
2679 | #ifdef AHD_DEBUG |
2680 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) { |
2681 | printk("%s: NLQCRC found via LQISTATE\n" , |
2682 | ahd_name(ahd)); |
2683 | } |
2684 | #endif |
2685 | lqistat1 |= LQICRCI_NLQ; |
2686 | } |
2687 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2688 | } |
2689 | |
2690 | ahd_outb(ahd, CLRLQIINT1, lqistat1); |
2691 | lastphase = ahd_inb(ahd, LASTPHASE); |
2692 | curphase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK; |
2693 | perrdiag = ahd_inb(ahd, PERRDIAG); |
2694 | msg_out = INITIATOR_ERROR; |
2695 | ahd_outb(ahd, CLRSINT1, CLRSCSIPERR); |
2696 | |
2697 | /* |
2698 | * Try to find the SCB associated with this error. |
2699 | */ |
2700 | silent = FALSE; |
2701 | if (lqistat1 == 0 |
2702 | || (lqistat1 & LQICRCI_NLQ) != 0) { |
2703 | if ((lqistat1 & (LQICRCI_NLQ|LQIOVERI_NLQ)) != 0) |
2704 | ahd_set_active_fifo(ahd); |
2705 | scbid = ahd_get_scbptr(ahd); |
2706 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2707 | if (scb != NULL && SCB_IS_SILENT(scb)) |
2708 | silent = TRUE; |
2709 | } |
2710 | |
2711 | cur_col = 0; |
2712 | if (silent == FALSE) { |
2713 | printk("%s: Transmission error detected\n" , ahd_name(ahd)); |
2714 | ahd_lqistat1_print(lqistat1, &cur_col, 50); |
2715 | ahd_lastphase_print(lastphase, &cur_col, 50); |
2716 | ahd_scsisigi_print(curphase, &cur_col, 50); |
2717 | ahd_perrdiag_print(perrdiag, &cur_col, 50); |
2718 | printk("\n" ); |
2719 | ahd_dump_card_state(ahd); |
2720 | } |
2721 | |
2722 | if ((lqistat1 & (LQIOVERI_LQ|LQIOVERI_NLQ)) != 0) { |
2723 | if (silent == FALSE) { |
2724 | printk("%s: Gross protocol error during incoming " |
2725 | "packet. lqistat1 == 0x%x. Resetting bus.\n" , |
2726 | ahd_name(ahd), lqistat1); |
2727 | } |
2728 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2729 | return; |
2730 | } else if ((lqistat1 & LQICRCI_LQ) != 0) { |
2731 | /* |
2732 | * A CRC error has been detected on an incoming LQ. |
2733 | * The bus is currently hung on the last ACK. |
2734 | * Hit LQIRETRY to release the last ack, and |
2735 | * wait for the sequencer to determine that ATNO |
2736 | * is asserted while in message out to take us |
2737 | * to our host message loop. No NONPACKREQ or |
2738 | * LQIPHASE type errors will occur in this |
2739 | * scenario. After this first LQIRETRY, the LQI |
2740 | * manager will be in ISELO where it will |
2741 | * happily sit until another packet phase begins. |
2742 | * Unexpected bus free detection is enabled |
2743 | * through any phases that occur after we release |
2744 | * this last ack until the LQI manager sees a |
2745 | * packet phase. This implies we may have to |
2746 | * ignore a perfectly valid "unexected busfree" |
2747 | * after our "initiator detected error" message is |
2748 | * sent. A busfree is the expected response after |
2749 | * we tell the target that it's L_Q was corrupted. |
2750 | * (SPI4R09 10.7.3.3.3) |
2751 | */ |
2752 | ahd_outb(ahd, LQCTL2, LQIRETRY); |
2753 | printk("LQIRetry for LQICRCI_LQ to release ACK\n" ); |
2754 | } else if ((lqistat1 & LQICRCI_NLQ) != 0) { |
2755 | /* |
2756 | * We detected a CRC error in a NON-LQ packet. |
2757 | * The hardware has varying behavior in this situation |
2758 | * depending on whether this packet was part of a |
2759 | * stream or not. |
2760 | * |
2761 | * PKT by PKT mode: |
2762 | * The hardware has already acked the complete packet. |
2763 | * If the target honors our outstanding ATN condition, |
2764 | * we should be (or soon will be) in MSGOUT phase. |
2765 | * This will trigger the LQIPHASE_LQ status bit as the |
2766 | * hardware was expecting another LQ. Unexpected |
2767 | * busfree detection is enabled. Once LQIPHASE_LQ is |
2768 | * true (first entry into host message loop is much |
2769 | * the same), we must clear LQIPHASE_LQ and hit |
2770 | * LQIRETRY so the hardware is ready to handle |
2771 | * a future LQ. NONPACKREQ will not be asserted again |
2772 | * once we hit LQIRETRY until another packet is |
2773 | * processed. The target may either go busfree |
2774 | * or start another packet in response to our message. |
2775 | * |
2776 | * Read Streaming P0 asserted: |
2777 | * If we raise ATN and the target completes the entire |
2778 | * stream (P0 asserted during the last packet), the |
2779 | * hardware will ack all data and return to the ISTART |
2780 | * state. When the target reponds to our ATN condition, |
2781 | * LQIPHASE_LQ will be asserted. We should respond to |
2782 | * this with an LQIRETRY to prepare for any future |
2783 | * packets. NONPACKREQ will not be asserted again |
2784 | * once we hit LQIRETRY until another packet is |
2785 | * processed. The target may either go busfree or |
2786 | * start another packet in response to our message. |
2787 | * Busfree detection is enabled. |
2788 | * |
2789 | * Read Streaming P0 not asserted: |
2790 | * If we raise ATN and the target transitions to |
2791 | * MSGOUT in or after a packet where P0 is not |
2792 | * asserted, the hardware will assert LQIPHASE_NLQ. |
2793 | * We should respond to the LQIPHASE_NLQ with an |
2794 | * LQIRETRY. Should the target stay in a non-pkt |
2795 | * phase after we send our message, the hardware |
2796 | * will assert LQIPHASE_LQ. Recovery is then just as |
2797 | * listed above for the read streaming with P0 asserted. |
2798 | * Busfree detection is enabled. |
2799 | */ |
2800 | if (silent == FALSE) |
2801 | printk("LQICRC_NLQ\n" ); |
2802 | if (scb == NULL) { |
2803 | printk("%s: No SCB valid for LQICRC_NLQ. " |
2804 | "Resetting bus\n" , ahd_name(ahd)); |
2805 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2806 | return; |
2807 | } |
2808 | } else if ((lqistat1 & LQIBADLQI) != 0) { |
2809 | printk("Need to handle BADLQI!\n" ); |
2810 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2811 | return; |
2812 | } else if ((perrdiag & (PARITYERR|PREVPHASE)) == PARITYERR) { |
2813 | if ((curphase & ~P_DATAIN_DT) != 0) { |
2814 | /* Ack the byte. So we can continue. */ |
2815 | if (silent == FALSE) |
2816 | printk("Acking %s to clear perror\n" , |
2817 | ahd_lookup_phase_entry(curphase)->phasemsg); |
2818 | ahd_inb(ahd, SCSIDAT); |
2819 | } |
2820 | |
2821 | if (curphase == P_MESGIN) |
2822 | msg_out = MSG_PARITY_ERROR; |
2823 | } |
2824 | |
2825 | /* |
2826 | * We've set the hardware to assert ATN if we |
2827 | * get a parity error on "in" phases, so all we |
2828 | * need to do is stuff the message buffer with |
2829 | * the appropriate message. "In" phases have set |
2830 | * mesg_out to something other than NOP. |
2831 | */ |
2832 | ahd->send_msg_perror = msg_out; |
2833 | if (scb != NULL && msg_out == INITIATOR_ERROR) |
2834 | scb->flags |= SCB_TRANSMISSION_ERROR; |
2835 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
2836 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
2837 | ahd_unpause(ahd); |
2838 | } |
2839 | |
2840 | static void |
2841 | ahd_handle_lqiphase_error(struct ahd_softc *ahd, u_int lqistat1) |
2842 | { |
2843 | /* |
2844 | * Clear the sources of the interrupts. |
2845 | */ |
2846 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2847 | ahd_outb(ahd, CLRLQIINT1, lqistat1); |
2848 | |
2849 | /* |
2850 | * If the "illegal" phase changes were in response |
2851 | * to our ATN to flag a CRC error, AND we ended up |
2852 | * on packet boundaries, clear the error, restart the |
2853 | * LQI manager as appropriate, and go on our merry |
2854 | * way toward sending the message. Otherwise, reset |
2855 | * the bus to clear the error. |
2856 | */ |
2857 | ahd_set_active_fifo(ahd); |
2858 | if ((ahd_inb(ahd, SCSISIGO) & ATNO) != 0 |
2859 | && (ahd_inb(ahd, MDFFSTAT) & DLZERO) != 0) { |
2860 | if ((lqistat1 & LQIPHASE_LQ) != 0) { |
2861 | printk("LQIRETRY for LQIPHASE_LQ\n" ); |
2862 | ahd_outb(ahd, LQCTL2, LQIRETRY); |
2863 | } else if ((lqistat1 & LQIPHASE_NLQ) != 0) { |
2864 | printk("LQIRETRY for LQIPHASE_NLQ\n" ); |
2865 | ahd_outb(ahd, LQCTL2, LQIRETRY); |
2866 | } else |
2867 | panic(fmt: "ahd_handle_lqiphase_error: No phase errors\n" ); |
2868 | ahd_dump_card_state(ahd); |
2869 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
2870 | ahd_unpause(ahd); |
2871 | } else { |
2872 | printk("Resetting Channel for LQI Phase error\n" ); |
2873 | ahd_dump_card_state(ahd); |
2874 | ahd_reset_channel(ahd, channel: 'A', /*Initiate Reset*/TRUE); |
2875 | } |
2876 | } |
2877 | |
2878 | /* |
2879 | * Packetized unexpected or expected busfree. |
2880 | * Entered in mode based on busfreetime. |
2881 | */ |
2882 | static int |
2883 | ahd_handle_pkt_busfree(struct ahd_softc *ahd, u_int busfreetime) |
2884 | { |
2885 | u_int lqostat1; |
2886 | |
2887 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
2888 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
2889 | lqostat1 = ahd_inb(ahd, LQOSTAT1); |
2890 | if ((lqostat1 & LQOBUSFREE) != 0) { |
2891 | struct scb *scb; |
2892 | u_int scbid; |
2893 | u_int saved_scbptr; |
2894 | u_int waiting_h; |
2895 | u_int waiting_t; |
2896 | u_int next; |
2897 | |
2898 | /* |
2899 | * The LQO manager detected an unexpected busfree |
2900 | * either: |
2901 | * |
2902 | * 1) During an outgoing LQ. |
2903 | * 2) After an outgoing LQ but before the first |
2904 | * REQ of the command packet. |
2905 | * 3) During an outgoing command packet. |
2906 | * |
2907 | * In all cases, CURRSCB is pointing to the |
2908 | * SCB that encountered the failure. Clean |
2909 | * up the queue, clear SELDO and LQOBUSFREE, |
2910 | * and allow the sequencer to restart the select |
2911 | * out at its lesure. |
2912 | */ |
2913 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
2914 | scbid = ahd_inw(ahd, CURRSCB); |
2915 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2916 | if (scb == NULL) |
2917 | panic(fmt: "SCB not valid during LQOBUSFREE" ); |
2918 | /* |
2919 | * Clear the status. |
2920 | */ |
2921 | ahd_outb(ahd, CLRLQOINT1, CLRLQOBUSFREE); |
2922 | if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) |
2923 | ahd_outb(ahd, CLRLQOINT1, 0); |
2924 | ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO); |
2925 | ahd_flush_device_writes(ahd); |
2926 | ahd_outb(ahd, CLRSINT0, CLRSELDO); |
2927 | |
2928 | /* |
2929 | * Return the LQO manager to its idle loop. It will |
2930 | * not do this automatically if the busfree occurs |
2931 | * after the first REQ of either the LQ or command |
2932 | * packet or between the LQ and command packet. |
2933 | */ |
2934 | ahd_outb(ahd, LQCTL2, ahd_inb(ahd, LQCTL2) | LQOTOIDLE); |
2935 | |
2936 | /* |
2937 | * Update the waiting for selection queue so |
2938 | * we restart on the correct SCB. |
2939 | */ |
2940 | waiting_h = ahd_inw(ahd, WAITING_TID_HEAD); |
2941 | saved_scbptr = ahd_get_scbptr(ahd); |
2942 | if (waiting_h != scbid) { |
2943 | |
2944 | ahd_outw(ahd, WAITING_TID_HEAD, scbid); |
2945 | waiting_t = ahd_inw(ahd, WAITING_TID_TAIL); |
2946 | if (waiting_t == waiting_h) { |
2947 | ahd_outw(ahd, WAITING_TID_TAIL, scbid); |
2948 | next = SCB_LIST_NULL; |
2949 | } else { |
2950 | ahd_set_scbptr(ahd, scbptr: waiting_h); |
2951 | next = ahd_inw_scbram(ahd, SCB_NEXT2); |
2952 | } |
2953 | ahd_set_scbptr(ahd, scbptr: scbid); |
2954 | ahd_outw(ahd, SCB_NEXT2, next); |
2955 | } |
2956 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
2957 | if (scb->crc_retry_count < AHD_MAX_LQ_CRC_ERRORS) { |
2958 | if (SCB_IS_SILENT(scb) == FALSE) { |
2959 | ahd_print_path(ahd, scb); |
2960 | printk("Probable outgoing LQ CRC error. " |
2961 | "Retrying command\n" ); |
2962 | } |
2963 | scb->crc_retry_count++; |
2964 | } else { |
2965 | ahd_set_transaction_status(scb, status: CAM_UNCOR_PARITY); |
2966 | ahd_freeze_scb(scb); |
2967 | ahd_freeze_devq(ahd, scb); |
2968 | } |
2969 | /* Return unpausing the sequencer. */ |
2970 | return (0); |
2971 | } else if ((ahd_inb(ahd, PERRDIAG) & PARITYERR) != 0) { |
2972 | /* |
2973 | * Ignore what are really parity errors that |
2974 | * occur on the last REQ of a free running |
2975 | * clock prior to going busfree. Some drives |
2976 | * do not properly active negate just before |
2977 | * going busfree resulting in a parity glitch. |
2978 | */ |
2979 | ahd_outb(ahd, CLRSINT1, CLRSCSIPERR|CLRBUSFREE); |
2980 | #ifdef AHD_DEBUG |
2981 | if ((ahd_debug & AHD_SHOW_MASKED_ERRORS) != 0) |
2982 | printk("%s: Parity on last REQ detected " |
2983 | "during busfree phase.\n" , |
2984 | ahd_name(ahd)); |
2985 | #endif |
2986 | /* Return unpausing the sequencer. */ |
2987 | return (0); |
2988 | } |
2989 | if (ahd->src_mode != AHD_MODE_SCSI) { |
2990 | u_int scbid; |
2991 | struct scb *scb; |
2992 | |
2993 | scbid = ahd_get_scbptr(ahd); |
2994 | scb = ahd_lookup_scb(ahd, tag: scbid); |
2995 | ahd_print_path(ahd, scb); |
2996 | printk("Unexpected PKT busfree condition\n" ); |
2997 | ahd_dump_card_state(ahd); |
2998 | ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 'A', |
2999 | SCB_GET_LUN(scb), SCB_GET_TAG(scb), |
3000 | ROLE_INITIATOR, CAM_UNEXP_BUSFREE); |
3001 | |
3002 | /* Return restarting the sequencer. */ |
3003 | return (1); |
3004 | } |
3005 | printk("%s: Unexpected PKT busfree condition\n" , ahd_name(ahd)); |
3006 | ahd_dump_card_state(ahd); |
3007 | /* Restart the sequencer. */ |
3008 | return (1); |
3009 | } |
3010 | |
3011 | /* |
3012 | * Non-packetized unexpected or expected busfree. |
3013 | */ |
3014 | static int |
3015 | ahd_handle_nonpkt_busfree(struct ahd_softc *ahd) |
3016 | { |
3017 | struct ahd_devinfo devinfo; |
3018 | struct scb *scb; |
3019 | u_int lastphase; |
3020 | u_int saved_scsiid; |
3021 | u_int saved_lun; |
3022 | u_int target; |
3023 | u_int initiator_role_id; |
3024 | u_int scbid; |
3025 | u_int ppr_busfree; |
3026 | int printerror; |
3027 | |
3028 | /* |
3029 | * Look at what phase we were last in. If its message out, |
3030 | * chances are pretty good that the busfree was in response |
3031 | * to one of our abort requests. |
3032 | */ |
3033 | lastphase = ahd_inb(ahd, LASTPHASE); |
3034 | saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); |
3035 | saved_lun = ahd_inb(ahd, SAVED_LUN); |
3036 | target = SCSIID_TARGET(ahd, saved_scsiid); |
3037 | initiator_role_id = SCSIID_OUR_ID(saved_scsiid); |
3038 | ahd_compile_devinfo(devinfo: &devinfo, our_id: initiator_role_id, |
3039 | target, lun: saved_lun, channel: 'A', role: ROLE_INITIATOR); |
3040 | printerror = 1; |
3041 | |
3042 | scbid = ahd_get_scbptr(ahd); |
3043 | scb = ahd_lookup_scb(ahd, tag: scbid); |
3044 | if (scb != NULL |
3045 | && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) |
3046 | scb = NULL; |
3047 | |
3048 | ppr_busfree = (ahd->msg_flags & MSG_FLAG_EXPECT_PPR_BUSFREE) != 0; |
3049 | if (lastphase == P_MESGOUT) { |
3050 | u_int tag; |
3051 | |
3052 | tag = SCB_LIST_NULL; |
3053 | if (ahd_sent_msg(ahd, type: AHDMSG_1B, msgval: ABORT_TASK, TRUE) |
3054 | || ahd_sent_msg(ahd, type: AHDMSG_1B, msgval: ABORT_TASK_SET, TRUE)) { |
3055 | int found; |
3056 | int sent_msg; |
3057 | |
3058 | if (scb == NULL) { |
3059 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
3060 | printk("Abort for unidentified " |
3061 | "connection completed.\n" ); |
3062 | /* restart the sequencer. */ |
3063 | return (1); |
3064 | } |
3065 | sent_msg = ahd->msgout_buf[ahd->msgout_index - 1]; |
3066 | ahd_print_path(ahd, scb); |
3067 | printk("SCB %d - Abort%s Completed.\n" , |
3068 | SCB_GET_TAG(scb), |
3069 | sent_msg == ABORT_TASK ? "" : " Tag" ); |
3070 | |
3071 | if (sent_msg == ABORT_TASK) |
3072 | tag = SCB_GET_TAG(scb); |
3073 | |
3074 | if ((scb->flags & SCB_EXTERNAL_RESET) != 0) { |
3075 | /* |
3076 | * This abort is in response to an |
3077 | * unexpected switch to command phase |
3078 | * for a packetized connection. Since |
3079 | * the identify message was never sent, |
3080 | * "saved lun" is 0. We really want to |
3081 | * abort only the SCB that encountered |
3082 | * this error, which could have a different |
3083 | * lun. The SCB will be retried so the OS |
3084 | * will see the UA after renegotiating to |
3085 | * packetized. |
3086 | */ |
3087 | tag = SCB_GET_TAG(scb); |
3088 | saved_lun = scb->hscb->lun; |
3089 | } |
3090 | found = ahd_abort_scbs(ahd, target, channel: 'A', lun: saved_lun, |
3091 | tag, role: ROLE_INITIATOR, |
3092 | status: CAM_REQ_ABORTED); |
3093 | printk("found == 0x%x\n" , found); |
3094 | printerror = 0; |
3095 | } else if (ahd_sent_msg(ahd, type: AHDMSG_1B, |
3096 | msgval: TARGET_RESET, TRUE)) { |
3097 | ahd_handle_devreset(ahd, devinfo: &devinfo, CAM_LUN_WILDCARD, |
3098 | status: CAM_BDR_SENT, message: "Bus Device Reset" , |
3099 | /*verbose_level*/0); |
3100 | printerror = 0; |
3101 | } else if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_PPR, FALSE) |
3102 | && ppr_busfree == 0) { |
3103 | struct ahd_initiator_tinfo *tinfo; |
3104 | struct ahd_tmode_tstate *tstate; |
3105 | |
3106 | /* |
3107 | * PPR Rejected. |
3108 | * |
3109 | * If the previous negotiation was packetized, |
3110 | * this could be because the device has been |
3111 | * reset without our knowledge. Force our |
3112 | * current negotiation to async and retry the |
3113 | * negotiation. Otherwise retry the command |
3114 | * with non-ppr negotiation. |
3115 | */ |
3116 | #ifdef AHD_DEBUG |
3117 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3118 | printk("PPR negotiation rejected busfree.\n" ); |
3119 | #endif |
3120 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo.channel, |
3121 | our_id: devinfo.our_scsiid, |
3122 | remote_id: devinfo.target, tstate: &tstate); |
3123 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)!=0) { |
3124 | ahd_set_width(ahd, devinfo: &devinfo, |
3125 | MSG_EXT_WDTR_BUS_8_BIT, |
3126 | AHD_TRANS_CUR, |
3127 | /*paused*/TRUE); |
3128 | ahd_set_syncrate(ahd, devinfo: &devinfo, |
3129 | /*period*/0, /*offset*/0, |
3130 | /*ppr_options*/0, |
3131 | AHD_TRANS_CUR, |
3132 | /*paused*/TRUE); |
3133 | /* |
3134 | * The expect PPR busfree handler below |
3135 | * will effect the retry and necessary |
3136 | * abort. |
3137 | */ |
3138 | } else { |
3139 | tinfo->curr.transport_version = 2; |
3140 | tinfo->goal.transport_version = 2; |
3141 | tinfo->goal.ppr_options = 0; |
3142 | if (scb != NULL) { |
3143 | /* |
3144 | * Remove any SCBs in the waiting |
3145 | * for selection queue that may |
3146 | * also be for this target so that |
3147 | * command ordering is preserved. |
3148 | */ |
3149 | ahd_freeze_devq(ahd, scb); |
3150 | ahd_qinfifo_requeue_tail(ahd, scb); |
3151 | } |
3152 | printerror = 0; |
3153 | } |
3154 | } else if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_WDTR, FALSE) |
3155 | && ppr_busfree == 0) { |
3156 | /* |
3157 | * Negotiation Rejected. Go-narrow and |
3158 | * retry command. |
3159 | */ |
3160 | #ifdef AHD_DEBUG |
3161 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3162 | printk("WDTR negotiation rejected busfree.\n" ); |
3163 | #endif |
3164 | ahd_set_width(ahd, devinfo: &devinfo, |
3165 | MSG_EXT_WDTR_BUS_8_BIT, |
3166 | AHD_TRANS_CUR|AHD_TRANS_GOAL, |
3167 | /*paused*/TRUE); |
3168 | if (scb != NULL) { |
3169 | /* |
3170 | * Remove any SCBs in the waiting for |
3171 | * selection queue that may also be for |
3172 | * this target so that command ordering |
3173 | * is preserved. |
3174 | */ |
3175 | ahd_freeze_devq(ahd, scb); |
3176 | ahd_qinfifo_requeue_tail(ahd, scb); |
3177 | } |
3178 | printerror = 0; |
3179 | } else if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_SDTR, FALSE) |
3180 | && ppr_busfree == 0) { |
3181 | /* |
3182 | * Negotiation Rejected. Go-async and |
3183 | * retry command. |
3184 | */ |
3185 | #ifdef AHD_DEBUG |
3186 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3187 | printk("SDTR negotiation rejected busfree.\n" ); |
3188 | #endif |
3189 | ahd_set_syncrate(ahd, devinfo: &devinfo, |
3190 | /*period*/0, /*offset*/0, |
3191 | /*ppr_options*/0, |
3192 | AHD_TRANS_CUR|AHD_TRANS_GOAL, |
3193 | /*paused*/TRUE); |
3194 | if (scb != NULL) { |
3195 | /* |
3196 | * Remove any SCBs in the waiting for |
3197 | * selection queue that may also be for |
3198 | * this target so that command ordering |
3199 | * is preserved. |
3200 | */ |
3201 | ahd_freeze_devq(ahd, scb); |
3202 | ahd_qinfifo_requeue_tail(ahd, scb); |
3203 | } |
3204 | printerror = 0; |
3205 | } else if ((ahd->msg_flags & MSG_FLAG_EXPECT_IDE_BUSFREE) != 0 |
3206 | && ahd_sent_msg(ahd, type: AHDMSG_1B, |
3207 | msgval: INITIATOR_ERROR, TRUE)) { |
3208 | |
3209 | #ifdef AHD_DEBUG |
3210 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3211 | printk("Expected IDE Busfree\n" ); |
3212 | #endif |
3213 | printerror = 0; |
3214 | } else if ((ahd->msg_flags & MSG_FLAG_EXPECT_QASREJ_BUSFREE) |
3215 | && ahd_sent_msg(ahd, type: AHDMSG_1B, |
3216 | msgval: MESSAGE_REJECT, TRUE)) { |
3217 | |
3218 | #ifdef AHD_DEBUG |
3219 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3220 | printk("Expected QAS Reject Busfree\n" ); |
3221 | #endif |
3222 | printerror = 0; |
3223 | } |
3224 | } |
3225 | |
3226 | /* |
3227 | * The busfree required flag is honored at the end of |
3228 | * the message phases. We check it last in case we |
3229 | * had to send some other message that caused a busfree. |
3230 | */ |
3231 | if (scb != NULL && printerror != 0 |
3232 | && (lastphase == P_MESGIN || lastphase == P_MESGOUT) |
3233 | && ((ahd->msg_flags & MSG_FLAG_EXPECT_PPR_BUSFREE) != 0)) { |
3234 | |
3235 | ahd_freeze_devq(ahd, scb); |
3236 | ahd_set_transaction_status(scb, status: CAM_REQUEUE_REQ); |
3237 | ahd_freeze_scb(scb); |
3238 | if ((ahd->msg_flags & MSG_FLAG_IU_REQ_CHANGED) != 0) { |
3239 | ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), |
3240 | SCB_GET_CHANNEL(ahd, scb), |
3241 | SCB_GET_LUN(scb), SCB_LIST_NULL, |
3242 | ROLE_INITIATOR, CAM_REQ_ABORTED); |
3243 | } else { |
3244 | #ifdef AHD_DEBUG |
3245 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3246 | printk("PPR Negotiation Busfree.\n" ); |
3247 | #endif |
3248 | ahd_done(ahd, scb); |
3249 | } |
3250 | printerror = 0; |
3251 | } |
3252 | if (printerror != 0) { |
3253 | int aborted; |
3254 | |
3255 | aborted = 0; |
3256 | if (scb != NULL) { |
3257 | u_int tag; |
3258 | |
3259 | if ((scb->hscb->control & TAG_ENB) != 0) |
3260 | tag = SCB_GET_TAG(scb); |
3261 | else |
3262 | tag = SCB_LIST_NULL; |
3263 | ahd_print_path(ahd, scb); |
3264 | aborted = ahd_abort_scbs(ahd, target, channel: 'A', |
3265 | SCB_GET_LUN(scb), tag, |
3266 | role: ROLE_INITIATOR, |
3267 | status: CAM_UNEXP_BUSFREE); |
3268 | } else { |
3269 | /* |
3270 | * We had not fully identified this connection, |
3271 | * so we cannot abort anything. |
3272 | */ |
3273 | printk("%s: " , ahd_name(ahd)); |
3274 | } |
3275 | printk("Unexpected busfree %s, %d SCBs aborted, " |
3276 | "PRGMCNT == 0x%x\n" , |
3277 | ahd_lookup_phase_entry(lastphase)->phasemsg, |
3278 | aborted, |
3279 | ahd_inw(ahd, PRGMCNT)); |
3280 | ahd_dump_card_state(ahd); |
3281 | if (lastphase != P_BUSFREE) |
3282 | ahd_force_renegotiation(ahd, devinfo: &devinfo); |
3283 | } |
3284 | /* Always restart the sequencer. */ |
3285 | return (1); |
3286 | } |
3287 | |
3288 | static void |
3289 | ahd_handle_proto_violation(struct ahd_softc *ahd) |
3290 | { |
3291 | struct ahd_devinfo devinfo; |
3292 | struct scb *scb; |
3293 | u_int scbid; |
3294 | u_int seq_flags; |
3295 | u_int curphase; |
3296 | u_int lastphase; |
3297 | int found; |
3298 | |
3299 | ahd_fetch_devinfo(ahd, devinfo: &devinfo); |
3300 | scbid = ahd_get_scbptr(ahd); |
3301 | scb = ahd_lookup_scb(ahd, tag: scbid); |
3302 | seq_flags = ahd_inb(ahd, SEQ_FLAGS); |
3303 | curphase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK; |
3304 | lastphase = ahd_inb(ahd, LASTPHASE); |
3305 | if ((seq_flags & NOT_IDENTIFIED) != 0) { |
3306 | |
3307 | /* |
3308 | * The reconnecting target either did not send an |
3309 | * identify message, or did, but we didn't find an SCB |
3310 | * to match. |
3311 | */ |
3312 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
3313 | printk("Target did not send an IDENTIFY message. " |
3314 | "LASTPHASE = 0x%x.\n" , lastphase); |
3315 | scb = NULL; |
3316 | } else if (scb == NULL) { |
3317 | /* |
3318 | * We don't seem to have an SCB active for this |
3319 | * transaction. Print an error and reset the bus. |
3320 | */ |
3321 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
3322 | printk("No SCB found during protocol violation\n" ); |
3323 | goto proto_violation_reset; |
3324 | } else { |
3325 | ahd_set_transaction_status(scb, status: CAM_SEQUENCE_FAIL); |
3326 | if ((seq_flags & NO_CDB_SENT) != 0) { |
3327 | ahd_print_path(ahd, scb); |
3328 | printk("No or incomplete CDB sent to device.\n" ); |
3329 | } else if ((ahd_inb_scbram(ahd, SCB_CONTROL) |
3330 | & STATUS_RCVD) == 0) { |
3331 | /* |
3332 | * The target never bothered to provide status to |
3333 | * us prior to completing the command. Since we don't |
3334 | * know the disposition of this command, we must attempt |
3335 | * to abort it. Assert ATN and prepare to send an abort |
3336 | * message. |
3337 | */ |
3338 | ahd_print_path(ahd, scb); |
3339 | printk("Completed command without status.\n" ); |
3340 | } else { |
3341 | ahd_print_path(ahd, scb); |
3342 | printk("Unknown protocol violation.\n" ); |
3343 | ahd_dump_card_state(ahd); |
3344 | } |
3345 | } |
3346 | if ((lastphase & ~P_DATAIN_DT) == 0 |
3347 | || lastphase == P_COMMAND) { |
3348 | proto_violation_reset: |
3349 | /* |
3350 | * Target either went directly to data |
3351 | * phase or didn't respond to our ATN. |
3352 | * The only safe thing to do is to blow |
3353 | * it away with a bus reset. |
3354 | */ |
3355 | found = ahd_reset_channel(ahd, channel: 'A', TRUE); |
3356 | printk("%s: Issued Channel %c Bus Reset. " |
3357 | "%d SCBs aborted\n" , ahd_name(ahd), 'A', found); |
3358 | } else { |
3359 | /* |
3360 | * Leave the selection hardware off in case |
3361 | * this abort attempt will affect yet to |
3362 | * be sent commands. |
3363 | */ |
3364 | ahd_outb(ahd, SCSISEQ0, |
3365 | ahd_inb(ahd, SCSISEQ0) & ~ENSELO); |
3366 | ahd_assert_atn(ahd); |
3367 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
3368 | if (scb == NULL) { |
3369 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
3370 | ahd->msgout_buf[0] = ABORT_TASK; |
3371 | ahd->msgout_len = 1; |
3372 | ahd->msgout_index = 0; |
3373 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
3374 | } else { |
3375 | ahd_print_path(ahd, scb); |
3376 | scb->flags |= SCB_ABORT; |
3377 | } |
3378 | printk("Protocol violation %s. Attempting to abort.\n" , |
3379 | ahd_lookup_phase_entry(curphase)->phasemsg); |
3380 | } |
3381 | } |
3382 | |
3383 | /* |
3384 | * Force renegotiation to occur the next time we initiate |
3385 | * a command to the current device. |
3386 | */ |
3387 | static void |
3388 | ahd_force_renegotiation(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
3389 | { |
3390 | struct ahd_initiator_tinfo *targ_info; |
3391 | struct ahd_tmode_tstate *tstate; |
3392 | |
3393 | #ifdef AHD_DEBUG |
3394 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
3395 | ahd_print_devinfo(ahd, devinfo); |
3396 | printk("Forcing renegotiation\n" ); |
3397 | } |
3398 | #endif |
3399 | targ_info = ahd_fetch_transinfo(ahd, |
3400 | channel: devinfo->channel, |
3401 | our_id: devinfo->our_scsiid, |
3402 | remote_id: devinfo->target, |
3403 | tstate: &tstate); |
3404 | ahd_update_neg_request(ahd, devinfo, tstate, |
3405 | targ_info, AHD_NEG_IF_NON_ASYNC); |
3406 | } |
3407 | |
3408 | #define AHD_MAX_STEPS 2000 |
3409 | static void |
3410 | ahd_clear_critical_section(struct ahd_softc *ahd) |
3411 | { |
3412 | ahd_mode_state saved_modes; |
3413 | int stepping; |
3414 | int steps; |
3415 | int first_instr; |
3416 | u_int simode0; |
3417 | u_int simode1; |
3418 | u_int simode3; |
3419 | u_int lqimode0; |
3420 | u_int lqimode1; |
3421 | u_int lqomode0; |
3422 | u_int lqomode1; |
3423 | |
3424 | if (ahd->num_critical_sections == 0) |
3425 | return; |
3426 | |
3427 | stepping = FALSE; |
3428 | steps = 0; |
3429 | first_instr = 0; |
3430 | simode0 = 0; |
3431 | simode1 = 0; |
3432 | simode3 = 0; |
3433 | lqimode0 = 0; |
3434 | lqimode1 = 0; |
3435 | lqomode0 = 0; |
3436 | lqomode1 = 0; |
3437 | saved_modes = ahd_save_modes(ahd); |
3438 | for (;;) { |
3439 | struct cs *cs; |
3440 | u_int seqaddr; |
3441 | u_int i; |
3442 | |
3443 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
3444 | seqaddr = ahd_inw(ahd, CURADDR); |
3445 | |
3446 | cs = ahd->critical_sections; |
3447 | for (i = 0; i < ahd->num_critical_sections; i++, cs++) { |
3448 | if (cs->begin < seqaddr && cs->end >= seqaddr) |
3449 | break; |
3450 | } |
3451 | |
3452 | if (i == ahd->num_critical_sections) |
3453 | break; |
3454 | |
3455 | if (steps > AHD_MAX_STEPS) { |
3456 | printk("%s: Infinite loop in critical section\n" |
3457 | "%s: First Instruction 0x%x now 0x%x\n" , |
3458 | ahd_name(ahd), ahd_name(ahd), first_instr, |
3459 | seqaddr); |
3460 | ahd_dump_card_state(ahd); |
3461 | panic(fmt: "critical section loop" ); |
3462 | } |
3463 | |
3464 | steps++; |
3465 | #ifdef AHD_DEBUG |
3466 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
3467 | printk("%s: Single stepping at 0x%x\n" , ahd_name(ahd), |
3468 | seqaddr); |
3469 | #endif |
3470 | if (stepping == FALSE) { |
3471 | |
3472 | first_instr = seqaddr; |
3473 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
3474 | simode0 = ahd_inb(ahd, SIMODE0); |
3475 | simode3 = ahd_inb(ahd, SIMODE3); |
3476 | lqimode0 = ahd_inb(ahd, LQIMODE0); |
3477 | lqimode1 = ahd_inb(ahd, LQIMODE1); |
3478 | lqomode0 = ahd_inb(ahd, LQOMODE0); |
3479 | lqomode1 = ahd_inb(ahd, LQOMODE1); |
3480 | ahd_outb(ahd, SIMODE0, 0); |
3481 | ahd_outb(ahd, SIMODE3, 0); |
3482 | ahd_outb(ahd, LQIMODE0, 0); |
3483 | ahd_outb(ahd, LQIMODE1, 0); |
3484 | ahd_outb(ahd, LQOMODE0, 0); |
3485 | ahd_outb(ahd, LQOMODE1, 0); |
3486 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
3487 | simode1 = ahd_inb(ahd, SIMODE1); |
3488 | /* |
3489 | * We don't clear ENBUSFREE. Unfortunately |
3490 | * we cannot re-enable busfree detection within |
3491 | * the current connection, so we must leave it |
3492 | * on while single stepping. |
3493 | */ |
3494 | ahd_outb(ahd, SIMODE1, simode1 & ENBUSFREE); |
3495 | ahd_outb(ahd, SEQCTL0, ahd_inb(ahd, SEQCTL0) | STEP); |
3496 | stepping = TRUE; |
3497 | } |
3498 | ahd_outb(ahd, CLRSINT1, CLRBUSFREE); |
3499 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
3500 | ahd_set_modes(ahd, src: ahd->saved_src_mode, dst: ahd->saved_dst_mode); |
3501 | ahd_outb(ahd, HCNTRL, ahd->unpause); |
3502 | while (!ahd_is_paused(ahd)) |
3503 | ahd_delay(200); |
3504 | ahd_update_modes(ahd); |
3505 | } |
3506 | if (stepping) { |
3507 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
3508 | ahd_outb(ahd, SIMODE0, simode0); |
3509 | ahd_outb(ahd, SIMODE3, simode3); |
3510 | ahd_outb(ahd, LQIMODE0, lqimode0); |
3511 | ahd_outb(ahd, LQIMODE1, lqimode1); |
3512 | ahd_outb(ahd, LQOMODE0, lqomode0); |
3513 | ahd_outb(ahd, LQOMODE1, lqomode1); |
3514 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
3515 | ahd_outb(ahd, SEQCTL0, ahd_inb(ahd, SEQCTL0) & ~STEP); |
3516 | ahd_outb(ahd, SIMODE1, simode1); |
3517 | /* |
3518 | * SCSIINT seems to glitch occasionally when |
3519 | * the interrupt masks are restored. Clear SCSIINT |
3520 | * one more time so that only persistent errors |
3521 | * are seen as a real interrupt. |
3522 | */ |
3523 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
3524 | } |
3525 | ahd_restore_modes(ahd, state: saved_modes); |
3526 | } |
3527 | |
3528 | /* |
3529 | * Clear any pending interrupt status. |
3530 | */ |
3531 | static void |
3532 | ahd_clear_intstat(struct ahd_softc *ahd) |
3533 | { |
3534 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
3535 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
3536 | /* Clear any interrupt conditions this may have caused */ |
3537 | ahd_outb(ahd, CLRLQIINT0, CLRLQIATNQAS|CLRLQICRCT1|CLRLQICRCT2 |
3538 | |CLRLQIBADLQT|CLRLQIATNLQ|CLRLQIATNCMD); |
3539 | ahd_outb(ahd, CLRLQIINT1, CLRLQIPHASE_LQ|CLRLQIPHASE_NLQ|CLRLIQABORT |
3540 | |CLRLQICRCI_LQ|CLRLQICRCI_NLQ|CLRLQIBADLQI |
3541 | |CLRLQIOVERI_LQ|CLRLQIOVERI_NLQ|CLRNONPACKREQ); |
3542 | ahd_outb(ahd, CLRLQOINT0, CLRLQOTARGSCBPERR|CLRLQOSTOPT2|CLRLQOATNLQ |
3543 | |CLRLQOATNPKT|CLRLQOTCRC); |
3544 | ahd_outb(ahd, CLRLQOINT1, CLRLQOINITSCBPERR|CLRLQOSTOPI2|CLRLQOBADQAS |
3545 | |CLRLQOBUSFREE|CLRLQOPHACHGINPKT); |
3546 | if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) { |
3547 | ahd_outb(ahd, CLRLQOINT0, 0); |
3548 | ahd_outb(ahd, CLRLQOINT1, 0); |
3549 | } |
3550 | ahd_outb(ahd, CLRSINT3, CLRNTRAMPERR|CLROSRAMPERR); |
3551 | ahd_outb(ahd, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI |
3552 | |CLRBUSFREE|CLRSCSIPERR|CLRREQINIT); |
3553 | ahd_outb(ahd, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO |
3554 | |CLRIOERR|CLROVERRUN); |
3555 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
3556 | } |
3557 | |
3558 | /**************************** Debugging Routines ******************************/ |
3559 | #ifdef AHD_DEBUG |
3560 | uint32_t ahd_debug = AHD_DEBUG_OPTS; |
3561 | #endif |
3562 | |
3563 | #if 0 |
3564 | void |
3565 | ahd_print_scb(struct scb *scb) |
3566 | { |
3567 | struct hardware_scb *hscb; |
3568 | int i; |
3569 | |
3570 | hscb = scb->hscb; |
3571 | printk("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n" , |
3572 | (void *)scb, |
3573 | hscb->control, |
3574 | hscb->scsiid, |
3575 | hscb->lun, |
3576 | hscb->cdb_len); |
3577 | printk("Shared Data: " ); |
3578 | for (i = 0; i < sizeof(hscb->shared_data.idata.cdb); i++) |
3579 | printk("%#02x" , hscb->shared_data.idata.cdb[i]); |
3580 | printk(" dataptr:%#x%x datacnt:%#x sgptr:%#x tag:%#x\n" , |
3581 | (uint32_t)((ahd_le64toh(hscb->dataptr) >> 32) & 0xFFFFFFFF), |
3582 | (uint32_t)(ahd_le64toh(hscb->dataptr) & 0xFFFFFFFF), |
3583 | ahd_le32toh(hscb->datacnt), |
3584 | ahd_le32toh(hscb->sgptr), |
3585 | SCB_GET_TAG(scb)); |
3586 | ahd_dump_sglist(scb); |
3587 | } |
3588 | #endif /* 0 */ |
3589 | |
3590 | /************************* Transfer Negotiation *******************************/ |
3591 | /* |
3592 | * Allocate per target mode instance (ID we respond to as a target) |
3593 | * transfer negotiation data structures. |
3594 | */ |
3595 | static struct ahd_tmode_tstate * |
3596 | ahd_alloc_tstate(struct ahd_softc *ahd, u_int scsi_id, char channel) |
3597 | { |
3598 | struct ahd_tmode_tstate *master_tstate; |
3599 | struct ahd_tmode_tstate *tstate; |
3600 | int i; |
3601 | |
3602 | master_tstate = ahd->enabled_targets[ahd->our_id]; |
3603 | if (ahd->enabled_targets[scsi_id] != NULL |
3604 | && ahd->enabled_targets[scsi_id] != master_tstate) |
3605 | panic(fmt: "%s: ahd_alloc_tstate - Target already allocated" , |
3606 | ahd_name(ahd)); |
3607 | tstate = kmalloc(size: sizeof(*tstate), GFP_ATOMIC); |
3608 | if (tstate == NULL) |
3609 | return (NULL); |
3610 | |
3611 | /* |
3612 | * If we have allocated a master tstate, copy user settings from |
3613 | * the master tstate (taken from SRAM or the EEPROM) for this |
3614 | * channel, but reset our current and goal settings to async/narrow |
3615 | * until an initiator talks to us. |
3616 | */ |
3617 | if (master_tstate != NULL) { |
3618 | memcpy(tstate, master_tstate, sizeof(*tstate)); |
3619 | memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns)); |
3620 | for (i = 0; i < 16; i++) { |
3621 | memset(&tstate->transinfo[i].curr, 0, |
3622 | sizeof(tstate->transinfo[i].curr)); |
3623 | memset(&tstate->transinfo[i].goal, 0, |
3624 | sizeof(tstate->transinfo[i].goal)); |
3625 | } |
3626 | } else |
3627 | memset(tstate, 0, sizeof(*tstate)); |
3628 | ahd->enabled_targets[scsi_id] = tstate; |
3629 | return (tstate); |
3630 | } |
3631 | |
3632 | #ifdef AHD_TARGET_MODE |
3633 | /* |
3634 | * Free per target mode instance (ID we respond to as a target) |
3635 | * transfer negotiation data structures. |
3636 | */ |
3637 | static void |
3638 | ahd_free_tstate(struct ahd_softc *ahd, u_int scsi_id, char channel, int force) |
3639 | { |
3640 | struct ahd_tmode_tstate *tstate; |
3641 | |
3642 | /* |
3643 | * Don't clean up our "master" tstate. |
3644 | * It has our default user settings. |
3645 | */ |
3646 | if (scsi_id == ahd->our_id |
3647 | && force == FALSE) |
3648 | return; |
3649 | |
3650 | tstate = ahd->enabled_targets[scsi_id]; |
3651 | kfree(tstate); |
3652 | ahd->enabled_targets[scsi_id] = NULL; |
3653 | } |
3654 | #endif |
3655 | |
3656 | /* |
3657 | * Called when we have an active connection to a target on the bus, |
3658 | * this function finds the nearest period to the input period limited |
3659 | * by the capabilities of the bus connectivity of and sync settings for |
3660 | * the target. |
3661 | */ |
3662 | static void |
3663 | ahd_devlimited_syncrate(struct ahd_softc *ahd, |
3664 | struct ahd_initiator_tinfo *tinfo, |
3665 | u_int *period, u_int *ppr_options, role_t role) |
3666 | { |
3667 | struct ahd_transinfo *transinfo; |
3668 | u_int maxsync; |
3669 | |
3670 | if ((ahd_inb(ahd, SBLKCTL) & ENAB40) != 0 |
3671 | && (ahd_inb(ahd, SSTAT2) & EXP_ACTIVE) == 0) { |
3672 | maxsync = AHD_SYNCRATE_PACED; |
3673 | } else { |
3674 | maxsync = AHD_SYNCRATE_ULTRA; |
3675 | /* Can't do DT related options on an SE bus */ |
3676 | *ppr_options &= MSG_EXT_PPR_QAS_REQ; |
3677 | } |
3678 | /* |
3679 | * Never allow a value higher than our current goal |
3680 | * period otherwise we may allow a target initiated |
3681 | * negotiation to go above the limit as set by the |
3682 | * user. In the case of an initiator initiated |
3683 | * sync negotiation, we limit based on the user |
3684 | * setting. This allows the system to still accept |
3685 | * incoming negotiations even if target initiated |
3686 | * negotiation is not performed. |
3687 | */ |
3688 | if (role == ROLE_TARGET) |
3689 | transinfo = &tinfo->user; |
3690 | else |
3691 | transinfo = &tinfo->goal; |
3692 | *ppr_options &= (transinfo->ppr_options|MSG_EXT_PPR_PCOMP_EN); |
3693 | if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) { |
3694 | maxsync = max(maxsync, (u_int)AHD_SYNCRATE_ULTRA2); |
3695 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
3696 | } |
3697 | if (transinfo->period == 0) { |
3698 | *period = 0; |
3699 | *ppr_options = 0; |
3700 | } else { |
3701 | *period = max(*period, (u_int)transinfo->period); |
3702 | ahd_find_syncrate(ahd, period, ppr_options, maxsync); |
3703 | } |
3704 | } |
3705 | |
3706 | /* |
3707 | * Look up the valid period to SCSIRATE conversion in our table. |
3708 | * Return the period and offset that should be sent to the target |
3709 | * if this was the beginning of an SDTR. |
3710 | */ |
3711 | void |
3712 | ahd_find_syncrate(struct ahd_softc *ahd, u_int *period, |
3713 | u_int *ppr_options, u_int maxsync) |
3714 | { |
3715 | if (*period < maxsync) |
3716 | *period = maxsync; |
3717 | |
3718 | if ((*ppr_options & MSG_EXT_PPR_DT_REQ) != 0 |
3719 | && *period > AHD_SYNCRATE_MIN_DT) |
3720 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
3721 | |
3722 | if (*period > AHD_SYNCRATE_MIN) |
3723 | *period = 0; |
3724 | |
3725 | /* Honor PPR option conformance rules. */ |
3726 | if (*period > AHD_SYNCRATE_PACED) |
3727 | *ppr_options &= ~MSG_EXT_PPR_RTI; |
3728 | |
3729 | if ((*ppr_options & MSG_EXT_PPR_IU_REQ) == 0) |
3730 | *ppr_options &= (MSG_EXT_PPR_DT_REQ|MSG_EXT_PPR_QAS_REQ); |
3731 | |
3732 | if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0) |
3733 | *ppr_options &= MSG_EXT_PPR_QAS_REQ; |
3734 | |
3735 | /* Skip all PACED only entries if IU is not available */ |
3736 | if ((*ppr_options & MSG_EXT_PPR_IU_REQ) == 0 |
3737 | && *period < AHD_SYNCRATE_DT) |
3738 | *period = AHD_SYNCRATE_DT; |
3739 | |
3740 | /* Skip all DT only entries if DT is not available */ |
3741 | if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0 |
3742 | && *period < AHD_SYNCRATE_ULTRA2) |
3743 | *period = AHD_SYNCRATE_ULTRA2; |
3744 | } |
3745 | |
3746 | /* |
3747 | * Truncate the given synchronous offset to a value the |
3748 | * current adapter type and syncrate are capable of. |
3749 | */ |
3750 | static void |
3751 | ahd_validate_offset(struct ahd_softc *ahd, |
3752 | struct ahd_initiator_tinfo *tinfo, |
3753 | u_int period, u_int *offset, int wide, |
3754 | role_t role) |
3755 | { |
3756 | u_int maxoffset; |
3757 | |
3758 | /* Limit offset to what we can do */ |
3759 | if (period == 0) |
3760 | maxoffset = 0; |
3761 | else if (period <= AHD_SYNCRATE_PACED) { |
3762 | if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) |
3763 | maxoffset = MAX_OFFSET_PACED_BUG; |
3764 | else |
3765 | maxoffset = MAX_OFFSET_PACED; |
3766 | } else |
3767 | maxoffset = MAX_OFFSET_NON_PACED; |
3768 | *offset = min(*offset, maxoffset); |
3769 | if (tinfo != NULL) { |
3770 | if (role == ROLE_TARGET) |
3771 | *offset = min(*offset, (u_int)tinfo->user.offset); |
3772 | else |
3773 | *offset = min(*offset, (u_int)tinfo->goal.offset); |
3774 | } |
3775 | } |
3776 | |
3777 | /* |
3778 | * Truncate the given transfer width parameter to a value the |
3779 | * current adapter type is capable of. |
3780 | */ |
3781 | static void |
3782 | ahd_validate_width(struct ahd_softc *ahd, struct ahd_initiator_tinfo *tinfo, |
3783 | u_int *bus_width, role_t role) |
3784 | { |
3785 | switch (*bus_width) { |
3786 | default: |
3787 | if (ahd->features & AHD_WIDE) { |
3788 | /* Respond Wide */ |
3789 | *bus_width = MSG_EXT_WDTR_BUS_16_BIT; |
3790 | break; |
3791 | } |
3792 | fallthrough; |
3793 | case MSG_EXT_WDTR_BUS_8_BIT: |
3794 | *bus_width = MSG_EXT_WDTR_BUS_8_BIT; |
3795 | break; |
3796 | } |
3797 | if (tinfo != NULL) { |
3798 | if (role == ROLE_TARGET) |
3799 | *bus_width = min((u_int)tinfo->user.width, *bus_width); |
3800 | else |
3801 | *bus_width = min((u_int)tinfo->goal.width, *bus_width); |
3802 | } |
3803 | } |
3804 | |
3805 | /* |
3806 | * Update the bitmask of targets for which the controller should |
3807 | * negotiate with at the next convenient opportunity. This currently |
3808 | * means the next time we send the initial identify messages for |
3809 | * a new transaction. |
3810 | */ |
3811 | int |
3812 | ahd_update_neg_request(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
3813 | struct ahd_tmode_tstate *tstate, |
3814 | struct ahd_initiator_tinfo *tinfo, ahd_neg_type neg_type) |
3815 | { |
3816 | u_int auto_negotiate_orig; |
3817 | |
3818 | auto_negotiate_orig = tstate->auto_negotiate; |
3819 | if (neg_type == AHD_NEG_ALWAYS) { |
3820 | /* |
3821 | * Force our "current" settings to be |
3822 | * unknown so that unless a bus reset |
3823 | * occurs the need to renegotiate is |
3824 | * recorded persistently. |
3825 | */ |
3826 | if ((ahd->features & AHD_WIDE) != 0) |
3827 | tinfo->curr.width = AHD_WIDTH_UNKNOWN; |
3828 | tinfo->curr.period = AHD_PERIOD_UNKNOWN; |
3829 | tinfo->curr.offset = AHD_OFFSET_UNKNOWN; |
3830 | } |
3831 | if (tinfo->curr.period != tinfo->goal.period |
3832 | || tinfo->curr.width != tinfo->goal.width |
3833 | || tinfo->curr.offset != tinfo->goal.offset |
3834 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options |
3835 | || (neg_type == AHD_NEG_IF_NON_ASYNC |
3836 | && (tinfo->goal.offset != 0 |
3837 | || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT |
3838 | || tinfo->goal.ppr_options != 0))) |
3839 | tstate->auto_negotiate |= devinfo->target_mask; |
3840 | else |
3841 | tstate->auto_negotiate &= ~devinfo->target_mask; |
3842 | |
3843 | return (auto_negotiate_orig != tstate->auto_negotiate); |
3844 | } |
3845 | |
3846 | /* |
3847 | * Update the user/goal/curr tables of synchronous negotiation |
3848 | * parameters as well as, in the case of a current or active update, |
3849 | * any data structures on the host controller. In the case of an |
3850 | * active update, the specified target is currently talking to us on |
3851 | * the bus, so the transfer parameter update must take effect |
3852 | * immediately. |
3853 | */ |
3854 | void |
3855 | ahd_set_syncrate(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
3856 | u_int period, u_int offset, u_int ppr_options, |
3857 | u_int type, int paused) |
3858 | { |
3859 | struct ahd_initiator_tinfo *tinfo; |
3860 | struct ahd_tmode_tstate *tstate; |
3861 | u_int old_period; |
3862 | u_int old_offset; |
3863 | u_int old_ppr; |
3864 | int active; |
3865 | int update_needed; |
3866 | |
3867 | active = (type & AHD_TRANS_ACTIVE) == AHD_TRANS_ACTIVE; |
3868 | update_needed = 0; |
3869 | |
3870 | if (period == 0 || offset == 0) { |
3871 | period = 0; |
3872 | offset = 0; |
3873 | } |
3874 | |
3875 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo->channel, our_id: devinfo->our_scsiid, |
3876 | remote_id: devinfo->target, tstate: &tstate); |
3877 | |
3878 | if ((type & AHD_TRANS_USER) != 0) { |
3879 | tinfo->user.period = period; |
3880 | tinfo->user.offset = offset; |
3881 | tinfo->user.ppr_options = ppr_options; |
3882 | } |
3883 | |
3884 | if ((type & AHD_TRANS_GOAL) != 0) { |
3885 | tinfo->goal.period = period; |
3886 | tinfo->goal.offset = offset; |
3887 | tinfo->goal.ppr_options = ppr_options; |
3888 | } |
3889 | |
3890 | old_period = tinfo->curr.period; |
3891 | old_offset = tinfo->curr.offset; |
3892 | old_ppr = tinfo->curr.ppr_options; |
3893 | |
3894 | if ((type & AHD_TRANS_CUR) != 0 |
3895 | && (old_period != period |
3896 | || old_offset != offset |
3897 | || old_ppr != ppr_options)) { |
3898 | |
3899 | update_needed++; |
3900 | |
3901 | tinfo->curr.period = period; |
3902 | tinfo->curr.offset = offset; |
3903 | tinfo->curr.ppr_options = ppr_options; |
3904 | |
3905 | ahd_send_async(ahd, channel: devinfo->channel, target: devinfo->target, |
3906 | CAM_LUN_WILDCARD, AC_TRANSFER_NEG); |
3907 | if (bootverbose) { |
3908 | if (offset != 0) { |
3909 | int options; |
3910 | |
3911 | printk("%s: target %d synchronous with " |
3912 | "period = 0x%x, offset = 0x%x" , |
3913 | ahd_name(ahd), devinfo->target, |
3914 | period, offset); |
3915 | options = 0; |
3916 | if ((ppr_options & MSG_EXT_PPR_RD_STRM) != 0) { |
3917 | printk("(RDSTRM" ); |
3918 | options++; |
3919 | } |
3920 | if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) { |
3921 | printk("%s" , options ? "|DT" : "(DT" ); |
3922 | options++; |
3923 | } |
3924 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { |
3925 | printk("%s" , options ? "|IU" : "(IU" ); |
3926 | options++; |
3927 | } |
3928 | if ((ppr_options & MSG_EXT_PPR_RTI) != 0) { |
3929 | printk("%s" , options ? "|RTI" : "(RTI" ); |
3930 | options++; |
3931 | } |
3932 | if ((ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) { |
3933 | printk("%s" , options ? "|QAS" : "(QAS" ); |
3934 | options++; |
3935 | } |
3936 | if (options != 0) |
3937 | printk(")\n" ); |
3938 | else |
3939 | printk("\n" ); |
3940 | } else { |
3941 | printk("%s: target %d using " |
3942 | "asynchronous transfers%s\n" , |
3943 | ahd_name(ahd), devinfo->target, |
3944 | (ppr_options & MSG_EXT_PPR_QAS_REQ) != 0 |
3945 | ? "(QAS)" : "" ); |
3946 | } |
3947 | } |
3948 | } |
3949 | /* |
3950 | * Always refresh the neg-table to handle the case of the |
3951 | * sequencer setting the ENATNO bit for a MK_MESSAGE request. |
3952 | * We will always renegotiate in that case if this is a |
3953 | * packetized request. Also manage the busfree expected flag |
3954 | * from this common routine so that we catch changes due to |
3955 | * WDTR or SDTR messages. |
3956 | */ |
3957 | if ((type & AHD_TRANS_CUR) != 0) { |
3958 | if (!paused) |
3959 | ahd_pause(ahd); |
3960 | ahd_update_neg_table(ahd, devinfo, tinfo: &tinfo->curr); |
3961 | if (!paused) |
3962 | ahd_unpause(ahd); |
3963 | if (ahd->msg_type != MSG_TYPE_NONE) { |
3964 | if ((old_ppr & MSG_EXT_PPR_IU_REQ) |
3965 | != (ppr_options & MSG_EXT_PPR_IU_REQ)) { |
3966 | #ifdef AHD_DEBUG |
3967 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
3968 | ahd_print_devinfo(ahd, devinfo); |
3969 | printk("Expecting IU Change busfree\n" ); |
3970 | } |
3971 | #endif |
3972 | ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE |
3973 | | MSG_FLAG_IU_REQ_CHANGED; |
3974 | } |
3975 | if ((old_ppr & MSG_EXT_PPR_IU_REQ) != 0) { |
3976 | #ifdef AHD_DEBUG |
3977 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
3978 | printk("PPR with IU_REQ outstanding\n" ); |
3979 | #endif |
3980 | ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE; |
3981 | } |
3982 | } |
3983 | } |
3984 | |
3985 | update_needed += ahd_update_neg_request(ahd, devinfo, tstate, |
3986 | tinfo, neg_type: AHD_NEG_TO_GOAL); |
3987 | |
3988 | if (update_needed && active) |
3989 | ahd_update_pending_scbs(ahd); |
3990 | } |
3991 | |
3992 | /* |
3993 | * Update the user/goal/curr tables of wide negotiation |
3994 | * parameters as well as, in the case of a current or active update, |
3995 | * any data structures on the host controller. In the case of an |
3996 | * active update, the specified target is currently talking to us on |
3997 | * the bus, so the transfer parameter update must take effect |
3998 | * immediately. |
3999 | */ |
4000 | void |
4001 | ahd_set_width(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4002 | u_int width, u_int type, int paused) |
4003 | { |
4004 | struct ahd_initiator_tinfo *tinfo; |
4005 | struct ahd_tmode_tstate *tstate; |
4006 | u_int oldwidth; |
4007 | int active; |
4008 | int update_needed; |
4009 | |
4010 | active = (type & AHD_TRANS_ACTIVE) == AHD_TRANS_ACTIVE; |
4011 | update_needed = 0; |
4012 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo->channel, our_id: devinfo->our_scsiid, |
4013 | remote_id: devinfo->target, tstate: &tstate); |
4014 | |
4015 | if ((type & AHD_TRANS_USER) != 0) |
4016 | tinfo->user.width = width; |
4017 | |
4018 | if ((type & AHD_TRANS_GOAL) != 0) |
4019 | tinfo->goal.width = width; |
4020 | |
4021 | oldwidth = tinfo->curr.width; |
4022 | if ((type & AHD_TRANS_CUR) != 0 && oldwidth != width) { |
4023 | |
4024 | update_needed++; |
4025 | |
4026 | tinfo->curr.width = width; |
4027 | ahd_send_async(ahd, channel: devinfo->channel, target: devinfo->target, |
4028 | CAM_LUN_WILDCARD, AC_TRANSFER_NEG); |
4029 | if (bootverbose) { |
4030 | printk("%s: target %d using %dbit transfers\n" , |
4031 | ahd_name(ahd), devinfo->target, |
4032 | 8 * (0x01 << width)); |
4033 | } |
4034 | } |
4035 | |
4036 | if ((type & AHD_TRANS_CUR) != 0) { |
4037 | if (!paused) |
4038 | ahd_pause(ahd); |
4039 | ahd_update_neg_table(ahd, devinfo, tinfo: &tinfo->curr); |
4040 | if (!paused) |
4041 | ahd_unpause(ahd); |
4042 | } |
4043 | |
4044 | update_needed += ahd_update_neg_request(ahd, devinfo, tstate, |
4045 | tinfo, neg_type: AHD_NEG_TO_GOAL); |
4046 | if (update_needed && active) |
4047 | ahd_update_pending_scbs(ahd); |
4048 | |
4049 | } |
4050 | |
4051 | /* |
4052 | * Update the current state of tagged queuing for a given target. |
4053 | */ |
4054 | static void |
4055 | ahd_set_tags(struct ahd_softc *ahd, struct scsi_cmnd *cmd, |
4056 | struct ahd_devinfo *devinfo, ahd_queue_alg alg) |
4057 | { |
4058 | struct scsi_device *sdev = cmd->device; |
4059 | |
4060 | ahd_platform_set_tags(ahd, sdev, devinfo, alg); |
4061 | ahd_send_async(ahd, channel: devinfo->channel, target: devinfo->target, |
4062 | lun: devinfo->lun, AC_TRANSFER_NEG); |
4063 | } |
4064 | |
4065 | static void |
4066 | ahd_update_neg_table(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4067 | struct ahd_transinfo *tinfo) |
4068 | { |
4069 | ahd_mode_state saved_modes; |
4070 | u_int period; |
4071 | u_int ppr_opts; |
4072 | u_int con_opts; |
4073 | u_int offset; |
4074 | u_int saved_negoaddr; |
4075 | uint8_t iocell_opts[sizeof(ahd->iocell_opts)]; |
4076 | |
4077 | saved_modes = ahd_save_modes(ahd); |
4078 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
4079 | |
4080 | saved_negoaddr = ahd_inb(ahd, NEGOADDR); |
4081 | ahd_outb(ahd, NEGOADDR, devinfo->target); |
4082 | period = tinfo->period; |
4083 | offset = tinfo->offset; |
4084 | memcpy(iocell_opts, ahd->iocell_opts, sizeof(ahd->iocell_opts)); |
4085 | ppr_opts = tinfo->ppr_options & (MSG_EXT_PPR_QAS_REQ|MSG_EXT_PPR_DT_REQ |
4086 | |MSG_EXT_PPR_IU_REQ|MSG_EXT_PPR_RTI); |
4087 | con_opts = 0; |
4088 | if (period == 0) |
4089 | period = AHD_SYNCRATE_ASYNC; |
4090 | if (period == AHD_SYNCRATE_160) { |
4091 | |
4092 | if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) { |
4093 | /* |
4094 | * When the SPI4 spec was finalized, PACE transfers |
4095 | * was not made a configurable option in the PPR |
4096 | * message. Instead it is assumed to be enabled for |
4097 | * any syncrate faster than 80MHz. Nevertheless, |
4098 | * Harpoon2A4 allows this to be configurable. |
4099 | * |
4100 | * Harpoon2A4 also assumes at most 2 data bytes per |
4101 | * negotiated REQ/ACK offset. Paced transfers take |
4102 | * 4, so we must adjust our offset. |
4103 | */ |
4104 | ppr_opts |= PPROPT_PACE; |
4105 | offset *= 2; |
4106 | |
4107 | /* |
4108 | * Harpoon2A assumed that there would be a |
4109 | * fallback rate between 160MHz and 80MHz, |
4110 | * so 7 is used as the period factor rather |
4111 | * than 8 for 160MHz. |
4112 | */ |
4113 | period = AHD_SYNCRATE_REVA_160; |
4114 | } |
4115 | if ((tinfo->ppr_options & MSG_EXT_PPR_PCOMP_EN) == 0) |
4116 | iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= |
4117 | ~AHD_PRECOMP_MASK; |
4118 | } else { |
4119 | /* |
4120 | * Precomp should be disabled for non-paced transfers. |
4121 | */ |
4122 | iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_PRECOMP_MASK; |
4123 | |
4124 | if ((ahd->features & AHD_NEW_IOCELL_OPTS) != 0 |
4125 | && (ppr_opts & MSG_EXT_PPR_DT_REQ) != 0 |
4126 | && (ppr_opts & MSG_EXT_PPR_IU_REQ) == 0) { |
4127 | /* |
4128 | * Slow down our CRC interval to be |
4129 | * compatible with non-packetized |
4130 | * U160 devices that can't handle a |
4131 | * CRC at full speed. |
4132 | */ |
4133 | con_opts |= ENSLOWCRC; |
4134 | } |
4135 | |
4136 | if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) { |
4137 | /* |
4138 | * On H2A4, revert to a slower slewrate |
4139 | * on non-paced transfers. |
4140 | */ |
4141 | iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= |
4142 | ~AHD_SLEWRATE_MASK; |
4143 | } |
4144 | } |
4145 | |
4146 | ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_PRECOMP_SLEW); |
4147 | ahd_outb(ahd, ANNEXDAT, iocell_opts[AHD_PRECOMP_SLEW_INDEX]); |
4148 | ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_AMPLITUDE); |
4149 | ahd_outb(ahd, ANNEXDAT, iocell_opts[AHD_AMPLITUDE_INDEX]); |
4150 | |
4151 | ahd_outb(ahd, NEGPERIOD, period); |
4152 | ahd_outb(ahd, NEGPPROPTS, ppr_opts); |
4153 | ahd_outb(ahd, NEGOFFSET, offset); |
4154 | |
4155 | if (tinfo->width == MSG_EXT_WDTR_BUS_16_BIT) |
4156 | con_opts |= WIDEXFER; |
4157 | |
4158 | /* |
4159 | * Slow down our CRC interval to be |
4160 | * compatible with packetized U320 devices |
4161 | * that can't handle a CRC at full speed |
4162 | */ |
4163 | if (ahd->features & AHD_AIC79XXB_SLOWCRC) { |
4164 | con_opts |= ENSLOWCRC; |
4165 | } |
4166 | |
4167 | /* |
4168 | * During packetized transfers, the target will |
4169 | * give us the opportunity to send command packets |
4170 | * without us asserting attention. |
4171 | */ |
4172 | if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) == 0) |
4173 | con_opts |= ENAUTOATNO; |
4174 | ahd_outb(ahd, NEGCONOPTS, con_opts); |
4175 | ahd_outb(ahd, NEGOADDR, saved_negoaddr); |
4176 | ahd_restore_modes(ahd, state: saved_modes); |
4177 | } |
4178 | |
4179 | /* |
4180 | * When the transfer settings for a connection change, setup for |
4181 | * negotiation in pending SCBs to effect the change as quickly as |
4182 | * possible. We also cancel any negotiations that are scheduled |
4183 | * for inflight SCBs that have not been started yet. |
4184 | */ |
4185 | static void |
4186 | ahd_update_pending_scbs(struct ahd_softc *ahd) |
4187 | { |
4188 | struct scb *pending_scb; |
4189 | int pending_scb_count; |
4190 | int paused; |
4191 | u_int saved_scbptr; |
4192 | ahd_mode_state saved_modes; |
4193 | |
4194 | /* |
4195 | * Traverse the pending SCB list and ensure that all of the |
4196 | * SCBs there have the proper settings. We can only safely |
4197 | * clear the negotiation required flag (setting requires the |
4198 | * execution queue to be modified) and this is only possible |
4199 | * if we are not already attempting to select out for this |
4200 | * SCB. For this reason, all callers only call this routine |
4201 | * if we are changing the negotiation settings for the currently |
4202 | * active transaction on the bus. |
4203 | */ |
4204 | pending_scb_count = 0; |
4205 | LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { |
4206 | struct ahd_devinfo devinfo; |
4207 | struct ahd_tmode_tstate *tstate; |
4208 | |
4209 | ahd_scb_devinfo(ahd, devinfo: &devinfo, scb: pending_scb); |
4210 | ahd_fetch_transinfo(ahd, channel: devinfo.channel, our_id: devinfo.our_scsiid, |
4211 | remote_id: devinfo.target, tstate: &tstate); |
4212 | if ((tstate->auto_negotiate & devinfo.target_mask) == 0 |
4213 | && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) { |
4214 | pending_scb->flags &= ~SCB_AUTO_NEGOTIATE; |
4215 | pending_scb->hscb->control &= ~MK_MESSAGE; |
4216 | } |
4217 | ahd_sync_scb(ahd, scb: pending_scb, |
4218 | BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
4219 | pending_scb_count++; |
4220 | } |
4221 | |
4222 | if (pending_scb_count == 0) |
4223 | return; |
4224 | |
4225 | if (ahd_is_paused(ahd)) { |
4226 | paused = 1; |
4227 | } else { |
4228 | paused = 0; |
4229 | ahd_pause(ahd); |
4230 | } |
4231 | |
4232 | /* |
4233 | * Force the sequencer to reinitialize the selection for |
4234 | * the command at the head of the execution queue if it |
4235 | * has already been setup. The negotiation changes may |
4236 | * effect whether we select-out with ATN. It is only |
4237 | * safe to clear ENSELO when the bus is not free and no |
4238 | * selection is in progres or completed. |
4239 | */ |
4240 | saved_modes = ahd_save_modes(ahd); |
4241 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
4242 | if ((ahd_inb(ahd, SCSISIGI) & BSYI) != 0 |
4243 | && (ahd_inb(ahd, SSTAT0) & (SELDO|SELINGO)) == 0) |
4244 | ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO); |
4245 | saved_scbptr = ahd_get_scbptr(ahd); |
4246 | /* Ensure that the hscbs down on the card match the new information */ |
4247 | LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { |
4248 | u_int scb_tag; |
4249 | u_int control; |
4250 | |
4251 | scb_tag = SCB_GET_TAG(pending_scb); |
4252 | ahd_set_scbptr(ahd, scbptr: scb_tag); |
4253 | control = ahd_inb_scbram(ahd, SCB_CONTROL); |
4254 | control &= ~MK_MESSAGE; |
4255 | control |= pending_scb->hscb->control & MK_MESSAGE; |
4256 | ahd_outb(ahd, SCB_CONTROL, control); |
4257 | } |
4258 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
4259 | ahd_restore_modes(ahd, state: saved_modes); |
4260 | |
4261 | if (paused == 0) |
4262 | ahd_unpause(ahd); |
4263 | } |
4264 | |
4265 | /**************************** Pathing Information *****************************/ |
4266 | static void |
4267 | ahd_fetch_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
4268 | { |
4269 | ahd_mode_state saved_modes; |
4270 | u_int saved_scsiid; |
4271 | role_t role; |
4272 | int our_id; |
4273 | |
4274 | saved_modes = ahd_save_modes(ahd); |
4275 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
4276 | |
4277 | if (ahd_inb(ahd, SSTAT0) & TARGET) |
4278 | role = ROLE_TARGET; |
4279 | else |
4280 | role = ROLE_INITIATOR; |
4281 | |
4282 | if (role == ROLE_TARGET |
4283 | && (ahd_inb(ahd, SEQ_FLAGS) & CMDPHASE_PENDING) != 0) { |
4284 | /* We were selected, so pull our id from TARGIDIN */ |
4285 | our_id = ahd_inb(ahd, TARGIDIN) & OID; |
4286 | } else if (role == ROLE_TARGET) |
4287 | our_id = ahd_inb(ahd, TOWNID); |
4288 | else |
4289 | our_id = ahd_inb(ahd, IOWNID); |
4290 | |
4291 | saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); |
4292 | ahd_compile_devinfo(devinfo, |
4293 | our_id, |
4294 | SCSIID_TARGET(ahd, saved_scsiid), |
4295 | ahd_inb(ahd, SAVED_LUN), |
4296 | SCSIID_CHANNEL(ahd, saved_scsiid), |
4297 | role); |
4298 | ahd_restore_modes(ahd, state: saved_modes); |
4299 | } |
4300 | |
4301 | void |
4302 | ahd_print_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
4303 | { |
4304 | printk("%s:%c:%d:%d: " , ahd_name(ahd), 'A', |
4305 | devinfo->target, devinfo->lun); |
4306 | } |
4307 | |
4308 | static const struct ahd_phase_table_entry* |
4309 | ahd_lookup_phase_entry(int phase) |
4310 | { |
4311 | const struct ahd_phase_table_entry *entry; |
4312 | const struct ahd_phase_table_entry *last_entry; |
4313 | |
4314 | /* |
4315 | * num_phases doesn't include the default entry which |
4316 | * will be returned if the phase doesn't match. |
4317 | */ |
4318 | last_entry = &ahd_phase_table[num_phases]; |
4319 | for (entry = ahd_phase_table; entry < last_entry; entry++) { |
4320 | if (phase == entry->phase) |
4321 | break; |
4322 | } |
4323 | return (entry); |
4324 | } |
4325 | |
4326 | void |
4327 | ahd_compile_devinfo(struct ahd_devinfo *devinfo, u_int our_id, u_int target, |
4328 | u_int lun, char channel, role_t role) |
4329 | { |
4330 | devinfo->our_scsiid = our_id; |
4331 | devinfo->target = target; |
4332 | devinfo->lun = lun; |
4333 | devinfo->target_offset = target; |
4334 | devinfo->channel = channel; |
4335 | devinfo->role = role; |
4336 | if (channel == 'B') |
4337 | devinfo->target_offset += 8; |
4338 | devinfo->target_mask = (0x01 << devinfo->target_offset); |
4339 | } |
4340 | |
4341 | static void |
4342 | ahd_scb_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4343 | struct scb *scb) |
4344 | { |
4345 | role_t role; |
4346 | int our_id; |
4347 | |
4348 | our_id = SCSIID_OUR_ID(scb->hscb->scsiid); |
4349 | role = ROLE_INITIATOR; |
4350 | if ((scb->hscb->control & TARGET_SCB) != 0) |
4351 | role = ROLE_TARGET; |
4352 | ahd_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahd, scb), |
4353 | SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahd, scb), role); |
4354 | } |
4355 | |
4356 | |
4357 | /************************ Message Phase Processing ****************************/ |
4358 | /* |
4359 | * When an initiator transaction with the MK_MESSAGE flag either reconnects |
4360 | * or enters the initial message out phase, we are interrupted. Fill our |
4361 | * outgoing message buffer with the appropriate message and beging handing |
4362 | * the message phase(s) manually. |
4363 | */ |
4364 | static void |
4365 | ahd_setup_initiator_msgout(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4366 | struct scb *scb) |
4367 | { |
4368 | /* |
4369 | * To facilitate adding multiple messages together, |
4370 | * each routine should increment the index and len |
4371 | * variables instead of setting them explicitly. |
4372 | */ |
4373 | ahd->msgout_index = 0; |
4374 | ahd->msgout_len = 0; |
4375 | |
4376 | if (ahd_currently_packetized(ahd)) |
4377 | ahd->msg_flags |= MSG_FLAG_PACKETIZED; |
4378 | |
4379 | if (ahd->send_msg_perror |
4380 | && ahd_inb(ahd, MSG_OUT) == HOST_MSG) { |
4381 | ahd->msgout_buf[ahd->msgout_index++] = ahd->send_msg_perror; |
4382 | ahd->msgout_len++; |
4383 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
4384 | #ifdef AHD_DEBUG |
4385 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
4386 | printk("Setting up for Parity Error delivery\n" ); |
4387 | #endif |
4388 | return; |
4389 | } else if (scb == NULL) { |
4390 | printk("%s: WARNING. No pending message for " |
4391 | "I_T msgin. Issuing NO-OP\n" , ahd_name(ahd)); |
4392 | ahd->msgout_buf[ahd->msgout_index++] = NOP; |
4393 | ahd->msgout_len++; |
4394 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
4395 | return; |
4396 | } |
4397 | |
4398 | if ((scb->flags & SCB_DEVICE_RESET) == 0 |
4399 | && (scb->flags & SCB_PACKETIZED) == 0 |
4400 | && ahd_inb(ahd, MSG_OUT) == MSG_IDENTIFYFLAG) { |
4401 | u_int identify_msg; |
4402 | |
4403 | identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb); |
4404 | if ((scb->hscb->control & DISCENB) != 0) |
4405 | identify_msg |= MSG_IDENTIFY_DISCFLAG; |
4406 | ahd->msgout_buf[ahd->msgout_index++] = identify_msg; |
4407 | ahd->msgout_len++; |
4408 | |
4409 | if ((scb->hscb->control & TAG_ENB) != 0) { |
4410 | ahd->msgout_buf[ahd->msgout_index++] = |
4411 | scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE); |
4412 | ahd->msgout_buf[ahd->msgout_index++] = SCB_GET_TAG(scb); |
4413 | ahd->msgout_len += 2; |
4414 | } |
4415 | } |
4416 | |
4417 | if (scb->flags & SCB_DEVICE_RESET) { |
4418 | ahd->msgout_buf[ahd->msgout_index++] = TARGET_RESET; |
4419 | ahd->msgout_len++; |
4420 | ahd_print_path(ahd, scb); |
4421 | printk("Bus Device Reset Message Sent\n" ); |
4422 | /* |
4423 | * Clear our selection hardware in advance of |
4424 | * the busfree. We may have an entry in the waiting |
4425 | * Q for this target, and we don't want to go about |
4426 | * selecting while we handle the busfree and blow it |
4427 | * away. |
4428 | */ |
4429 | ahd_outb(ahd, SCSISEQ0, 0); |
4430 | } else if ((scb->flags & SCB_ABORT) != 0) { |
4431 | |
4432 | if ((scb->hscb->control & TAG_ENB) != 0) { |
4433 | ahd->msgout_buf[ahd->msgout_index++] = ABORT_TASK; |
4434 | } else { |
4435 | ahd->msgout_buf[ahd->msgout_index++] = ABORT_TASK_SET; |
4436 | } |
4437 | ahd->msgout_len++; |
4438 | ahd_print_path(ahd, scb); |
4439 | printk("Abort%s Message Sent\n" , |
4440 | (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "" ); |
4441 | /* |
4442 | * Clear our selection hardware in advance of |
4443 | * the busfree. We may have an entry in the waiting |
4444 | * Q for this target, and we don't want to go about |
4445 | * selecting while we handle the busfree and blow it |
4446 | * away. |
4447 | */ |
4448 | ahd_outb(ahd, SCSISEQ0, 0); |
4449 | } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) { |
4450 | ahd_build_transfer_msg(ahd, devinfo); |
4451 | /* |
4452 | * Clear our selection hardware in advance of potential |
4453 | * PPR IU status change busfree. We may have an entry in |
4454 | * the waiting Q for this target, and we don't want to go |
4455 | * about selecting while we handle the busfree and blow |
4456 | * it away. |
4457 | */ |
4458 | ahd_outb(ahd, SCSISEQ0, 0); |
4459 | } else { |
4460 | printk("ahd_intr: AWAITING_MSG for an SCB that " |
4461 | "does not have a waiting message\n" ); |
4462 | printk("SCSIID = %x, target_mask = %x\n" , scb->hscb->scsiid, |
4463 | devinfo->target_mask); |
4464 | panic("SCB = %d, SCB Control = %x:%x, MSG_OUT = %x " |
4465 | "SCB flags = %x" , SCB_GET_TAG(scb), scb->hscb->control, |
4466 | ahd_inb_scbram(ahd, SCB_CONTROL), ahd_inb(ahd, MSG_OUT), |
4467 | scb->flags); |
4468 | } |
4469 | |
4470 | /* |
4471 | * Clear the MK_MESSAGE flag from the SCB so we aren't |
4472 | * asked to send this message again. |
4473 | */ |
4474 | ahd_outb(ahd, SCB_CONTROL, |
4475 | ahd_inb_scbram(ahd, SCB_CONTROL) & ~MK_MESSAGE); |
4476 | scb->hscb->control &= ~MK_MESSAGE; |
4477 | ahd->msgout_index = 0; |
4478 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
4479 | } |
4480 | |
4481 | /* |
4482 | * Build an appropriate transfer negotiation message for the |
4483 | * currently active target. |
4484 | */ |
4485 | static void |
4486 | ahd_build_transfer_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
4487 | { |
4488 | /* |
4489 | * We need to initiate transfer negotiations. |
4490 | * If our current and goal settings are identical, |
4491 | * we want to renegotiate due to a check condition. |
4492 | */ |
4493 | struct ahd_initiator_tinfo *tinfo; |
4494 | struct ahd_tmode_tstate *tstate; |
4495 | int dowide; |
4496 | int dosync; |
4497 | int doppr; |
4498 | u_int period; |
4499 | u_int ppr_options; |
4500 | u_int offset; |
4501 | |
4502 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo->channel, our_id: devinfo->our_scsiid, |
4503 | remote_id: devinfo->target, tstate: &tstate); |
4504 | /* |
4505 | * Filter our period based on the current connection. |
4506 | * If we can't perform DT transfers on this segment (not in LVD |
4507 | * mode for instance), then our decision to issue a PPR message |
4508 | * may change. |
4509 | */ |
4510 | period = tinfo->goal.period; |
4511 | offset = tinfo->goal.offset; |
4512 | ppr_options = tinfo->goal.ppr_options; |
4513 | /* Target initiated PPR is not allowed in the SCSI spec */ |
4514 | if (devinfo->role == ROLE_TARGET) |
4515 | ppr_options = 0; |
4516 | ahd_devlimited_syncrate(ahd, tinfo, period: &period, |
4517 | ppr_options: &ppr_options, role: devinfo->role); |
4518 | dowide = tinfo->curr.width != tinfo->goal.width; |
4519 | dosync = tinfo->curr.offset != offset || tinfo->curr.period != period; |
4520 | /* |
4521 | * Only use PPR if we have options that need it, even if the device |
4522 | * claims to support it. There might be an expander in the way |
4523 | * that doesn't. |
4524 | */ |
4525 | doppr = ppr_options != 0; |
4526 | |
4527 | if (!dowide && !dosync && !doppr) { |
4528 | dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; |
4529 | dosync = tinfo->goal.offset != 0; |
4530 | } |
4531 | |
4532 | if (!dowide && !dosync && !doppr) { |
4533 | /* |
4534 | * Force async with a WDTR message if we have a wide bus, |
4535 | * or just issue an SDTR with a 0 offset. |
4536 | */ |
4537 | if ((ahd->features & AHD_WIDE) != 0) |
4538 | dowide = 1; |
4539 | else |
4540 | dosync = 1; |
4541 | |
4542 | if (bootverbose) { |
4543 | ahd_print_devinfo(ahd, devinfo); |
4544 | printk("Ensuring async\n" ); |
4545 | } |
4546 | } |
4547 | /* Target initiated PPR is not allowed in the SCSI spec */ |
4548 | if (devinfo->role == ROLE_TARGET) |
4549 | doppr = 0; |
4550 | |
4551 | /* |
4552 | * Both the PPR message and SDTR message require the |
4553 | * goal syncrate to be limited to what the target device |
4554 | * is capable of handling (based on whether an LVD->SE |
4555 | * expander is on the bus), so combine these two cases. |
4556 | * Regardless, guarantee that if we are using WDTR and SDTR |
4557 | * messages that WDTR comes first. |
4558 | */ |
4559 | if (doppr || (dosync && !dowide)) { |
4560 | |
4561 | offset = tinfo->goal.offset; |
4562 | ahd_validate_offset(ahd, tinfo, period, offset: &offset, |
4563 | wide: doppr ? tinfo->goal.width |
4564 | : tinfo->curr.width, |
4565 | role: devinfo->role); |
4566 | if (doppr) { |
4567 | ahd_construct_ppr(ahd, devinfo, period, offset, |
4568 | bus_width: tinfo->goal.width, ppr_options); |
4569 | } else { |
4570 | ahd_construct_sdtr(ahd, devinfo, period, offset); |
4571 | } |
4572 | } else { |
4573 | ahd_construct_wdtr(ahd, devinfo, bus_width: tinfo->goal.width); |
4574 | } |
4575 | } |
4576 | |
4577 | /* |
4578 | * Build a synchronous negotiation message in our message |
4579 | * buffer based on the input parameters. |
4580 | */ |
4581 | static void |
4582 | ahd_construct_sdtr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4583 | u_int period, u_int offset) |
4584 | { |
4585 | if (offset == 0) |
4586 | period = AHD_ASYNC_XFER_PERIOD; |
4587 | ahd->msgout_index += spi_populate_sync_msg( |
4588 | msg: ahd->msgout_buf + ahd->msgout_index, period, offset); |
4589 | ahd->msgout_len += 5; |
4590 | if (bootverbose) { |
4591 | printk("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n" , |
4592 | ahd_name(ahd), devinfo->channel, devinfo->target, |
4593 | devinfo->lun, period, offset); |
4594 | } |
4595 | } |
4596 | |
4597 | /* |
4598 | * Build a wide negotiateion message in our message |
4599 | * buffer based on the input parameters. |
4600 | */ |
4601 | static void |
4602 | ahd_construct_wdtr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4603 | u_int bus_width) |
4604 | { |
4605 | ahd->msgout_index += spi_populate_width_msg( |
4606 | msg: ahd->msgout_buf + ahd->msgout_index, width: bus_width); |
4607 | ahd->msgout_len += 4; |
4608 | if (bootverbose) { |
4609 | printk("(%s:%c:%d:%d): Sending WDTR %x\n" , |
4610 | ahd_name(ahd), devinfo->channel, devinfo->target, |
4611 | devinfo->lun, bus_width); |
4612 | } |
4613 | } |
4614 | |
4615 | /* |
4616 | * Build a parallel protocol request message in our message |
4617 | * buffer based on the input parameters. |
4618 | */ |
4619 | static void |
4620 | ahd_construct_ppr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
4621 | u_int period, u_int offset, u_int bus_width, |
4622 | u_int ppr_options) |
4623 | { |
4624 | /* |
4625 | * Always request precompensation from |
4626 | * the other target if we are running |
4627 | * at paced syncrates. |
4628 | */ |
4629 | if (period <= AHD_SYNCRATE_PACED) |
4630 | ppr_options |= MSG_EXT_PPR_PCOMP_EN; |
4631 | if (offset == 0) |
4632 | period = AHD_ASYNC_XFER_PERIOD; |
4633 | ahd->msgout_index += spi_populate_ppr_msg( |
4634 | msg: ahd->msgout_buf + ahd->msgout_index, period, offset, |
4635 | width: bus_width, options: ppr_options); |
4636 | ahd->msgout_len += 8; |
4637 | if (bootverbose) { |
4638 | printk("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, " |
4639 | "offset %x, ppr_options %x\n" , ahd_name(ahd), |
4640 | devinfo->channel, devinfo->target, devinfo->lun, |
4641 | bus_width, period, offset, ppr_options); |
4642 | } |
4643 | } |
4644 | |
4645 | /* |
4646 | * Clear any active message state. |
4647 | */ |
4648 | static void |
4649 | ahd_clear_msg_state(struct ahd_softc *ahd) |
4650 | { |
4651 | ahd_mode_state saved_modes; |
4652 | |
4653 | saved_modes = ahd_save_modes(ahd); |
4654 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
4655 | ahd->send_msg_perror = 0; |
4656 | ahd->msg_flags = MSG_FLAG_NONE; |
4657 | ahd->msgout_len = 0; |
4658 | ahd->msgin_index = 0; |
4659 | ahd->msg_type = MSG_TYPE_NONE; |
4660 | if ((ahd_inb(ahd, SCSISIGO) & ATNO) != 0) { |
4661 | /* |
4662 | * The target didn't care to respond to our |
4663 | * message request, so clear ATN. |
4664 | */ |
4665 | ahd_outb(ahd, CLRSINT1, CLRATNO); |
4666 | } |
4667 | ahd_outb(ahd, MSG_OUT, NOP); |
4668 | ahd_outb(ahd, SEQ_FLAGS2, |
4669 | ahd_inb(ahd, SEQ_FLAGS2) & ~TARGET_MSG_PENDING); |
4670 | ahd_restore_modes(ahd, state: saved_modes); |
4671 | } |
4672 | |
4673 | /* |
4674 | * Manual message loop handler. |
4675 | */ |
4676 | static void |
4677 | ahd_handle_message_phase(struct ahd_softc *ahd) |
4678 | { |
4679 | struct ahd_devinfo devinfo; |
4680 | u_int bus_phase; |
4681 | int end_session; |
4682 | |
4683 | ahd_fetch_devinfo(ahd, devinfo: &devinfo); |
4684 | end_session = FALSE; |
4685 | bus_phase = ahd_inb(ahd, LASTPHASE); |
4686 | |
4687 | if ((ahd_inb(ahd, LQISTAT2) & LQIPHASE_OUTPKT) != 0) { |
4688 | printk("LQIRETRY for LQIPHASE_OUTPKT\n" ); |
4689 | ahd_outb(ahd, LQCTL2, LQIRETRY); |
4690 | } |
4691 | reswitch: |
4692 | switch (ahd->msg_type) { |
4693 | case MSG_TYPE_INITIATOR_MSGOUT: |
4694 | { |
4695 | int lastbyte; |
4696 | int phasemis; |
4697 | int msgdone; |
4698 | |
4699 | if (ahd->msgout_len == 0 && ahd->send_msg_perror == 0) |
4700 | panic(fmt: "HOST_MSG_LOOP interrupt with no active message" ); |
4701 | |
4702 | #ifdef AHD_DEBUG |
4703 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
4704 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
4705 | printk("INITIATOR_MSG_OUT" ); |
4706 | } |
4707 | #endif |
4708 | phasemis = bus_phase != P_MESGOUT; |
4709 | if (phasemis) { |
4710 | #ifdef AHD_DEBUG |
4711 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
4712 | printk(" PHASEMIS %s\n" , |
4713 | ahd_lookup_phase_entry(bus_phase) |
4714 | ->phasemsg); |
4715 | } |
4716 | #endif |
4717 | if (bus_phase == P_MESGIN) { |
4718 | /* |
4719 | * Change gears and see if |
4720 | * this messages is of interest to |
4721 | * us or should be passed back to |
4722 | * the sequencer. |
4723 | */ |
4724 | ahd_outb(ahd, CLRSINT1, CLRATNO); |
4725 | ahd->send_msg_perror = 0; |
4726 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGIN; |
4727 | ahd->msgin_index = 0; |
4728 | goto reswitch; |
4729 | } |
4730 | end_session = TRUE; |
4731 | break; |
4732 | } |
4733 | |
4734 | if (ahd->send_msg_perror) { |
4735 | ahd_outb(ahd, CLRSINT1, CLRATNO); |
4736 | ahd_outb(ahd, CLRSINT1, CLRREQINIT); |
4737 | #ifdef AHD_DEBUG |
4738 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
4739 | printk(" byte 0x%x\n" , ahd->send_msg_perror); |
4740 | #endif |
4741 | /* |
4742 | * If we are notifying the target of a CRC error |
4743 | * during packetized operations, the target is |
4744 | * within its rights to acknowledge our message |
4745 | * with a busfree. |
4746 | */ |
4747 | if ((ahd->msg_flags & MSG_FLAG_PACKETIZED) != 0 |
4748 | && ahd->send_msg_perror == INITIATOR_ERROR) |
4749 | ahd->msg_flags |= MSG_FLAG_EXPECT_IDE_BUSFREE; |
4750 | |
4751 | ahd_outb(ahd, RETURN_2, ahd->send_msg_perror); |
4752 | ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE); |
4753 | break; |
4754 | } |
4755 | |
4756 | msgdone = ahd->msgout_index == ahd->msgout_len; |
4757 | if (msgdone) { |
4758 | /* |
4759 | * The target has requested a retry. |
4760 | * Re-assert ATN, reset our message index to |
4761 | * 0, and try again. |
4762 | */ |
4763 | ahd->msgout_index = 0; |
4764 | ahd_assert_atn(ahd); |
4765 | } |
4766 | |
4767 | lastbyte = ahd->msgout_index == (ahd->msgout_len - 1); |
4768 | if (lastbyte) { |
4769 | /* Last byte is signified by dropping ATN */ |
4770 | ahd_outb(ahd, CLRSINT1, CLRATNO); |
4771 | } |
4772 | |
4773 | /* |
4774 | * Clear our interrupt status and present |
4775 | * the next byte on the bus. |
4776 | */ |
4777 | ahd_outb(ahd, CLRSINT1, CLRREQINIT); |
4778 | #ifdef AHD_DEBUG |
4779 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
4780 | printk(" byte 0x%x\n" , |
4781 | ahd->msgout_buf[ahd->msgout_index]); |
4782 | #endif |
4783 | ahd_outb(ahd, RETURN_2, ahd->msgout_buf[ahd->msgout_index++]); |
4784 | ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE); |
4785 | break; |
4786 | } |
4787 | case MSG_TYPE_INITIATOR_MSGIN: |
4788 | { |
4789 | int phasemis; |
4790 | int message_done; |
4791 | |
4792 | #ifdef AHD_DEBUG |
4793 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
4794 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
4795 | printk("INITIATOR_MSG_IN" ); |
4796 | } |
4797 | #endif |
4798 | phasemis = bus_phase != P_MESGIN; |
4799 | if (phasemis) { |
4800 | #ifdef AHD_DEBUG |
4801 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
4802 | printk(" PHASEMIS %s\n" , |
4803 | ahd_lookup_phase_entry(bus_phase) |
4804 | ->phasemsg); |
4805 | } |
4806 | #endif |
4807 | ahd->msgin_index = 0; |
4808 | if (bus_phase == P_MESGOUT |
4809 | && (ahd->send_msg_perror != 0 |
4810 | || (ahd->msgout_len != 0 |
4811 | && ahd->msgout_index == 0))) { |
4812 | ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
4813 | goto reswitch; |
4814 | } |
4815 | end_session = TRUE; |
4816 | break; |
4817 | } |
4818 | |
4819 | /* Pull the byte in without acking it */ |
4820 | ahd->msgin_buf[ahd->msgin_index] = ahd_inb(ahd, SCSIBUS); |
4821 | #ifdef AHD_DEBUG |
4822 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
4823 | printk(" byte 0x%x\n" , |
4824 | ahd->msgin_buf[ahd->msgin_index]); |
4825 | #endif |
4826 | |
4827 | message_done = ahd_parse_msg(ahd, devinfo: &devinfo); |
4828 | |
4829 | if (message_done) { |
4830 | /* |
4831 | * Clear our incoming message buffer in case there |
4832 | * is another message following this one. |
4833 | */ |
4834 | ahd->msgin_index = 0; |
4835 | |
4836 | /* |
4837 | * If this message illicited a response, |
4838 | * assert ATN so the target takes us to the |
4839 | * message out phase. |
4840 | */ |
4841 | if (ahd->msgout_len != 0) { |
4842 | #ifdef AHD_DEBUG |
4843 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) { |
4844 | ahd_print_devinfo(ahd, devinfo: &devinfo); |
4845 | printk("Asserting ATN for response\n" ); |
4846 | } |
4847 | #endif |
4848 | ahd_assert_atn(ahd); |
4849 | } |
4850 | } else |
4851 | ahd->msgin_index++; |
4852 | |
4853 | if (message_done == MSGLOOP_TERMINATED) { |
4854 | end_session = TRUE; |
4855 | } else { |
4856 | /* Ack the byte */ |
4857 | ahd_outb(ahd, CLRSINT1, CLRREQINIT); |
4858 | ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_READ); |
4859 | } |
4860 | break; |
4861 | } |
4862 | case MSG_TYPE_TARGET_MSGIN: |
4863 | { |
4864 | int msgdone; |
4865 | int msgout_request; |
4866 | |
4867 | /* |
4868 | * By default, the message loop will continue. |
4869 | */ |
4870 | ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG); |
4871 | |
4872 | if (ahd->msgout_len == 0) |
4873 | panic(fmt: "Target MSGIN with no active message" ); |
4874 | |
4875 | /* |
4876 | * If we interrupted a mesgout session, the initiator |
4877 | * will not know this until our first REQ. So, we |
4878 | * only honor mesgout requests after we've sent our |
4879 | * first byte. |
4880 | */ |
4881 | if ((ahd_inb(ahd, SCSISIGI) & ATNI) != 0 |
4882 | && ahd->msgout_index > 0) |
4883 | msgout_request = TRUE; |
4884 | else |
4885 | msgout_request = FALSE; |
4886 | |
4887 | if (msgout_request) { |
4888 | |
4889 | /* |
4890 | * Change gears and see if |
4891 | * this messages is of interest to |
4892 | * us or should be passed back to |
4893 | * the sequencer. |
4894 | */ |
4895 | ahd->msg_type = MSG_TYPE_TARGET_MSGOUT; |
4896 | ahd_outb(ahd, SCSISIGO, P_MESGOUT | BSYO); |
4897 | ahd->msgin_index = 0; |
4898 | /* Dummy read to REQ for first byte */ |
4899 | ahd_inb(ahd, SCSIDAT); |
4900 | ahd_outb(ahd, SXFRCTL0, |
4901 | ahd_inb(ahd, SXFRCTL0) | SPIOEN); |
4902 | break; |
4903 | } |
4904 | |
4905 | msgdone = ahd->msgout_index == ahd->msgout_len; |
4906 | if (msgdone) { |
4907 | ahd_outb(ahd, SXFRCTL0, |
4908 | ahd_inb(ahd, SXFRCTL0) & ~SPIOEN); |
4909 | end_session = TRUE; |
4910 | break; |
4911 | } |
4912 | |
4913 | /* |
4914 | * Present the next byte on the bus. |
4915 | */ |
4916 | ahd_outb(ahd, SXFRCTL0, ahd_inb(ahd, SXFRCTL0) | SPIOEN); |
4917 | ahd_outb(ahd, SCSIDAT, ahd->msgout_buf[ahd->msgout_index++]); |
4918 | break; |
4919 | } |
4920 | case MSG_TYPE_TARGET_MSGOUT: |
4921 | { |
4922 | int lastbyte; |
4923 | int msgdone; |
4924 | |
4925 | /* |
4926 | * By default, the message loop will continue. |
4927 | */ |
4928 | ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG); |
4929 | |
4930 | /* |
4931 | * The initiator signals that this is |
4932 | * the last byte by dropping ATN. |
4933 | */ |
4934 | lastbyte = (ahd_inb(ahd, SCSISIGI) & ATNI) == 0; |
4935 | |
4936 | /* |
4937 | * Read the latched byte, but turn off SPIOEN first |
4938 | * so that we don't inadvertently cause a REQ for the |
4939 | * next byte. |
4940 | */ |
4941 | ahd_outb(ahd, SXFRCTL0, ahd_inb(ahd, SXFRCTL0) & ~SPIOEN); |
4942 | ahd->msgin_buf[ahd->msgin_index] = ahd_inb(ahd, SCSIDAT); |
4943 | msgdone = ahd_parse_msg(ahd, devinfo: &devinfo); |
4944 | if (msgdone == MSGLOOP_TERMINATED) { |
4945 | /* |
4946 | * The message is *really* done in that it caused |
4947 | * us to go to bus free. The sequencer has already |
4948 | * been reset at this point, so pull the ejection |
4949 | * handle. |
4950 | */ |
4951 | return; |
4952 | } |
4953 | |
4954 | ahd->msgin_index++; |
4955 | |
4956 | /* |
4957 | * XXX Read spec about initiator dropping ATN too soon |
4958 | * and use msgdone to detect it. |
4959 | */ |
4960 | if (msgdone == MSGLOOP_MSGCOMPLETE) { |
4961 | ahd->msgin_index = 0; |
4962 | |
4963 | /* |
4964 | * If this message illicited a response, transition |
4965 | * to the Message in phase and send it. |
4966 | */ |
4967 | if (ahd->msgout_len != 0) { |
4968 | ahd_outb(ahd, SCSISIGO, P_MESGIN | BSYO); |
4969 | ahd_outb(ahd, SXFRCTL0, |
4970 | ahd_inb(ahd, SXFRCTL0) | SPIOEN); |
4971 | ahd->msg_type = MSG_TYPE_TARGET_MSGIN; |
4972 | ahd->msgin_index = 0; |
4973 | break; |
4974 | } |
4975 | } |
4976 | |
4977 | if (lastbyte) |
4978 | end_session = TRUE; |
4979 | else { |
4980 | /* Ask for the next byte. */ |
4981 | ahd_outb(ahd, SXFRCTL0, |
4982 | ahd_inb(ahd, SXFRCTL0) | SPIOEN); |
4983 | } |
4984 | |
4985 | break; |
4986 | } |
4987 | default: |
4988 | panic(fmt: "Unknown REQINIT message type" ); |
4989 | } |
4990 | |
4991 | if (end_session) { |
4992 | if ((ahd->msg_flags & MSG_FLAG_PACKETIZED) != 0) { |
4993 | printk("%s: Returning to Idle Loop\n" , |
4994 | ahd_name(ahd)); |
4995 | ahd_clear_msg_state(ahd); |
4996 | |
4997 | /* |
4998 | * Perform the equivalent of a clear_target_state. |
4999 | */ |
5000 | ahd_outb(ahd, LASTPHASE, P_BUSFREE); |
5001 | ahd_outb(ahd, SEQ_FLAGS, NOT_IDENTIFIED|NO_CDB_SENT); |
5002 | ahd_outb(ahd, SEQCTL0, FASTMODE|SEQRESET); |
5003 | } else { |
5004 | ahd_clear_msg_state(ahd); |
5005 | ahd_outb(ahd, RETURN_1, EXIT_MSG_LOOP); |
5006 | } |
5007 | } |
5008 | } |
5009 | |
5010 | /* |
5011 | * See if we sent a particular extended message to the target. |
5012 | * If "full" is true, return true only if the target saw the full |
5013 | * message. If "full" is false, return true if the target saw at |
5014 | * least the first byte of the message. |
5015 | */ |
5016 | static int |
5017 | ahd_sent_msg(struct ahd_softc *ahd, ahd_msgtype type, u_int msgval, int full) |
5018 | { |
5019 | int found; |
5020 | u_int index; |
5021 | |
5022 | found = FALSE; |
5023 | index = 0; |
5024 | |
5025 | while (index < ahd->msgout_len) { |
5026 | if (ahd->msgout_buf[index] == EXTENDED_MESSAGE) { |
5027 | u_int end_index; |
5028 | |
5029 | end_index = index + 1 + ahd->msgout_buf[index + 1]; |
5030 | if (ahd->msgout_buf[index+2] == msgval |
5031 | && type == AHDMSG_EXT) { |
5032 | |
5033 | if (full) { |
5034 | if (ahd->msgout_index > end_index) |
5035 | found = TRUE; |
5036 | } else if (ahd->msgout_index > index) |
5037 | found = TRUE; |
5038 | } |
5039 | index = end_index; |
5040 | } else if (ahd->msgout_buf[index] >= SIMPLE_QUEUE_TAG |
5041 | && ahd->msgout_buf[index] <= IGNORE_WIDE_RESIDUE) { |
5042 | |
5043 | /* Skip tag type and tag id or residue param*/ |
5044 | index += 2; |
5045 | } else { |
5046 | /* Single byte message */ |
5047 | if (type == AHDMSG_1B |
5048 | && ahd->msgout_index > index |
5049 | && (ahd->msgout_buf[index] == msgval |
5050 | || ((ahd->msgout_buf[index] & MSG_IDENTIFYFLAG) != 0 |
5051 | && msgval == MSG_IDENTIFYFLAG))) |
5052 | found = TRUE; |
5053 | index++; |
5054 | } |
5055 | |
5056 | if (found) |
5057 | break; |
5058 | } |
5059 | return (found); |
5060 | } |
5061 | |
5062 | /* |
5063 | * Wait for a complete incoming message, parse it, and respond accordingly. |
5064 | */ |
5065 | static int |
5066 | ahd_parse_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
5067 | { |
5068 | struct ahd_initiator_tinfo *tinfo; |
5069 | struct ahd_tmode_tstate *tstate; |
5070 | int reject; |
5071 | int done; |
5072 | int response; |
5073 | |
5074 | done = MSGLOOP_IN_PROG; |
5075 | response = FALSE; |
5076 | reject = FALSE; |
5077 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo->channel, our_id: devinfo->our_scsiid, |
5078 | remote_id: devinfo->target, tstate: &tstate); |
5079 | |
5080 | /* |
5081 | * Parse as much of the message as is available, |
5082 | * rejecting it if we don't support it. When |
5083 | * the entire message is available and has been |
5084 | * handled, return MSGLOOP_MSGCOMPLETE, indicating |
5085 | * that we have parsed an entire message. |
5086 | * |
5087 | * In the case of extended messages, we accept the length |
5088 | * byte outright and perform more checking once we know the |
5089 | * extended message type. |
5090 | */ |
5091 | switch (ahd->msgin_buf[0]) { |
5092 | case DISCONNECT: |
5093 | case SAVE_POINTERS: |
5094 | case COMMAND_COMPLETE: |
5095 | case RESTORE_POINTERS: |
5096 | case IGNORE_WIDE_RESIDUE: |
5097 | /* |
5098 | * End our message loop as these are messages |
5099 | * the sequencer handles on its own. |
5100 | */ |
5101 | done = MSGLOOP_TERMINATED; |
5102 | break; |
5103 | case MESSAGE_REJECT: |
5104 | response = ahd_handle_msg_reject(ahd, devinfo); |
5105 | fallthrough; |
5106 | case NOP: |
5107 | done = MSGLOOP_MSGCOMPLETE; |
5108 | break; |
5109 | case EXTENDED_MESSAGE: |
5110 | { |
5111 | /* Wait for enough of the message to begin validation */ |
5112 | if (ahd->msgin_index < 2) |
5113 | break; |
5114 | switch (ahd->msgin_buf[2]) { |
5115 | case EXTENDED_SDTR: |
5116 | { |
5117 | u_int period; |
5118 | u_int ppr_options; |
5119 | u_int offset; |
5120 | u_int saved_offset; |
5121 | |
5122 | if (ahd->msgin_buf[1] != MSG_EXT_SDTR_LEN) { |
5123 | reject = TRUE; |
5124 | break; |
5125 | } |
5126 | |
5127 | /* |
5128 | * Wait until we have both args before validating |
5129 | * and acting on this message. |
5130 | * |
5131 | * Add one to MSG_EXT_SDTR_LEN to account for |
5132 | * the extended message preamble. |
5133 | */ |
5134 | if (ahd->msgin_index < (MSG_EXT_SDTR_LEN + 1)) |
5135 | break; |
5136 | |
5137 | period = ahd->msgin_buf[3]; |
5138 | ppr_options = 0; |
5139 | saved_offset = offset = ahd->msgin_buf[4]; |
5140 | ahd_devlimited_syncrate(ahd, tinfo, period: &period, |
5141 | ppr_options: &ppr_options, role: devinfo->role); |
5142 | ahd_validate_offset(ahd, tinfo, period, offset: &offset, |
5143 | wide: tinfo->curr.width, role: devinfo->role); |
5144 | if (bootverbose) { |
5145 | printk("(%s:%c:%d:%d): Received " |
5146 | "SDTR period %x, offset %x\n\t" |
5147 | "Filtered to period %x, offset %x\n" , |
5148 | ahd_name(ahd), devinfo->channel, |
5149 | devinfo->target, devinfo->lun, |
5150 | ahd->msgin_buf[3], saved_offset, |
5151 | period, offset); |
5152 | } |
5153 | ahd_set_syncrate(ahd, devinfo, period, |
5154 | offset, ppr_options, |
5155 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5156 | /*paused*/TRUE); |
5157 | |
5158 | /* |
5159 | * See if we initiated Sync Negotiation |
5160 | * and didn't have to fall down to async |
5161 | * transfers. |
5162 | */ |
5163 | if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_SDTR, TRUE)) { |
5164 | /* We started it */ |
5165 | if (saved_offset != offset) { |
5166 | /* Went too low - force async */ |
5167 | reject = TRUE; |
5168 | } |
5169 | } else { |
5170 | /* |
5171 | * Send our own SDTR in reply |
5172 | */ |
5173 | if (bootverbose |
5174 | && devinfo->role == ROLE_INITIATOR) { |
5175 | printk("(%s:%c:%d:%d): Target " |
5176 | "Initiated SDTR\n" , |
5177 | ahd_name(ahd), devinfo->channel, |
5178 | devinfo->target, devinfo->lun); |
5179 | } |
5180 | ahd->msgout_index = 0; |
5181 | ahd->msgout_len = 0; |
5182 | ahd_construct_sdtr(ahd, devinfo, |
5183 | period, offset); |
5184 | ahd->msgout_index = 0; |
5185 | response = TRUE; |
5186 | } |
5187 | done = MSGLOOP_MSGCOMPLETE; |
5188 | break; |
5189 | } |
5190 | case EXTENDED_WDTR: |
5191 | { |
5192 | u_int bus_width; |
5193 | u_int saved_width; |
5194 | u_int sending_reply; |
5195 | |
5196 | sending_reply = FALSE; |
5197 | if (ahd->msgin_buf[1] != MSG_EXT_WDTR_LEN) { |
5198 | reject = TRUE; |
5199 | break; |
5200 | } |
5201 | |
5202 | /* |
5203 | * Wait until we have our arg before validating |
5204 | * and acting on this message. |
5205 | * |
5206 | * Add one to MSG_EXT_WDTR_LEN to account for |
5207 | * the extended message preamble. |
5208 | */ |
5209 | if (ahd->msgin_index < (MSG_EXT_WDTR_LEN + 1)) |
5210 | break; |
5211 | |
5212 | bus_width = ahd->msgin_buf[3]; |
5213 | saved_width = bus_width; |
5214 | ahd_validate_width(ahd, tinfo, bus_width: &bus_width, |
5215 | role: devinfo->role); |
5216 | if (bootverbose) { |
5217 | printk("(%s:%c:%d:%d): Received WDTR " |
5218 | "%x filtered to %x\n" , |
5219 | ahd_name(ahd), devinfo->channel, |
5220 | devinfo->target, devinfo->lun, |
5221 | saved_width, bus_width); |
5222 | } |
5223 | |
5224 | if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_WDTR, TRUE)) { |
5225 | /* |
5226 | * Don't send a WDTR back to the |
5227 | * target, since we asked first. |
5228 | * If the width went higher than our |
5229 | * request, reject it. |
5230 | */ |
5231 | if (saved_width > bus_width) { |
5232 | reject = TRUE; |
5233 | printk("(%s:%c:%d:%d): requested %dBit " |
5234 | "transfers. Rejecting...\n" , |
5235 | ahd_name(ahd), devinfo->channel, |
5236 | devinfo->target, devinfo->lun, |
5237 | 8 * (0x01 << bus_width)); |
5238 | bus_width = 0; |
5239 | } |
5240 | } else { |
5241 | /* |
5242 | * Send our own WDTR in reply |
5243 | */ |
5244 | if (bootverbose |
5245 | && devinfo->role == ROLE_INITIATOR) { |
5246 | printk("(%s:%c:%d:%d): Target " |
5247 | "Initiated WDTR\n" , |
5248 | ahd_name(ahd), devinfo->channel, |
5249 | devinfo->target, devinfo->lun); |
5250 | } |
5251 | ahd->msgout_index = 0; |
5252 | ahd->msgout_len = 0; |
5253 | ahd_construct_wdtr(ahd, devinfo, bus_width); |
5254 | ahd->msgout_index = 0; |
5255 | response = TRUE; |
5256 | sending_reply = TRUE; |
5257 | } |
5258 | /* |
5259 | * After a wide message, we are async, but |
5260 | * some devices don't seem to honor this portion |
5261 | * of the spec. Force a renegotiation of the |
5262 | * sync component of our transfer agreement even |
5263 | * if our goal is async. By updating our width |
5264 | * after forcing the negotiation, we avoid |
5265 | * renegotiating for width. |
5266 | */ |
5267 | ahd_update_neg_request(ahd, devinfo, tstate, |
5268 | tinfo, neg_type: AHD_NEG_ALWAYS); |
5269 | ahd_set_width(ahd, devinfo, width: bus_width, |
5270 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5271 | /*paused*/TRUE); |
5272 | if (sending_reply == FALSE && reject == FALSE) { |
5273 | |
5274 | /* |
5275 | * We will always have an SDTR to send. |
5276 | */ |
5277 | ahd->msgout_index = 0; |
5278 | ahd->msgout_len = 0; |
5279 | ahd_build_transfer_msg(ahd, devinfo); |
5280 | ahd->msgout_index = 0; |
5281 | response = TRUE; |
5282 | } |
5283 | done = MSGLOOP_MSGCOMPLETE; |
5284 | break; |
5285 | } |
5286 | case EXTENDED_PPR: |
5287 | { |
5288 | u_int period; |
5289 | u_int offset; |
5290 | u_int bus_width; |
5291 | u_int ppr_options; |
5292 | u_int saved_width; |
5293 | u_int saved_offset; |
5294 | u_int saved_ppr_options; |
5295 | |
5296 | if (ahd->msgin_buf[1] != MSG_EXT_PPR_LEN) { |
5297 | reject = TRUE; |
5298 | break; |
5299 | } |
5300 | |
5301 | /* |
5302 | * Wait until we have all args before validating |
5303 | * and acting on this message. |
5304 | * |
5305 | * Add one to MSG_EXT_PPR_LEN to account for |
5306 | * the extended message preamble. |
5307 | */ |
5308 | if (ahd->msgin_index < (MSG_EXT_PPR_LEN + 1)) |
5309 | break; |
5310 | |
5311 | period = ahd->msgin_buf[3]; |
5312 | offset = ahd->msgin_buf[5]; |
5313 | bus_width = ahd->msgin_buf[6]; |
5314 | saved_width = bus_width; |
5315 | ppr_options = ahd->msgin_buf[7]; |
5316 | /* |
5317 | * According to the spec, a DT only |
5318 | * period factor with no DT option |
5319 | * set implies async. |
5320 | */ |
5321 | if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0 |
5322 | && period <= 9) |
5323 | offset = 0; |
5324 | saved_ppr_options = ppr_options; |
5325 | saved_offset = offset; |
5326 | |
5327 | /* |
5328 | * Transfer options are only available if we |
5329 | * are negotiating wide. |
5330 | */ |
5331 | if (bus_width == 0) |
5332 | ppr_options &= MSG_EXT_PPR_QAS_REQ; |
5333 | |
5334 | ahd_validate_width(ahd, tinfo, bus_width: &bus_width, |
5335 | role: devinfo->role); |
5336 | ahd_devlimited_syncrate(ahd, tinfo, period: &period, |
5337 | ppr_options: &ppr_options, role: devinfo->role); |
5338 | ahd_validate_offset(ahd, tinfo, period, offset: &offset, |
5339 | wide: bus_width, role: devinfo->role); |
5340 | |
5341 | if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_PPR, TRUE)) { |
5342 | /* |
5343 | * If we are unable to do any of the |
5344 | * requested options (we went too low), |
5345 | * then we'll have to reject the message. |
5346 | */ |
5347 | if (saved_width > bus_width |
5348 | || saved_offset != offset |
5349 | || saved_ppr_options != ppr_options) { |
5350 | reject = TRUE; |
5351 | period = 0; |
5352 | offset = 0; |
5353 | bus_width = 0; |
5354 | ppr_options = 0; |
5355 | } |
5356 | } else { |
5357 | if (devinfo->role != ROLE_TARGET) |
5358 | printk("(%s:%c:%d:%d): Target " |
5359 | "Initiated PPR\n" , |
5360 | ahd_name(ahd), devinfo->channel, |
5361 | devinfo->target, devinfo->lun); |
5362 | else |
5363 | printk("(%s:%c:%d:%d): Initiator " |
5364 | "Initiated PPR\n" , |
5365 | ahd_name(ahd), devinfo->channel, |
5366 | devinfo->target, devinfo->lun); |
5367 | ahd->msgout_index = 0; |
5368 | ahd->msgout_len = 0; |
5369 | ahd_construct_ppr(ahd, devinfo, period, offset, |
5370 | bus_width, ppr_options); |
5371 | ahd->msgout_index = 0; |
5372 | response = TRUE; |
5373 | } |
5374 | if (bootverbose) { |
5375 | printk("(%s:%c:%d:%d): Received PPR width %x, " |
5376 | "period %x, offset %x,options %x\n" |
5377 | "\tFiltered to width %x, period %x, " |
5378 | "offset %x, options %x\n" , |
5379 | ahd_name(ahd), devinfo->channel, |
5380 | devinfo->target, devinfo->lun, |
5381 | saved_width, ahd->msgin_buf[3], |
5382 | saved_offset, saved_ppr_options, |
5383 | bus_width, period, offset, ppr_options); |
5384 | } |
5385 | ahd_set_width(ahd, devinfo, width: bus_width, |
5386 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5387 | /*paused*/TRUE); |
5388 | ahd_set_syncrate(ahd, devinfo, period, |
5389 | offset, ppr_options, |
5390 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5391 | /*paused*/TRUE); |
5392 | |
5393 | done = MSGLOOP_MSGCOMPLETE; |
5394 | break; |
5395 | } |
5396 | default: |
5397 | /* Unknown extended message. Reject it. */ |
5398 | reject = TRUE; |
5399 | break; |
5400 | } |
5401 | break; |
5402 | } |
5403 | #ifdef AHD_TARGET_MODE |
5404 | case TARGET_RESET: |
5405 | ahd_handle_devreset(ahd, devinfo, CAM_LUN_WILDCARD, |
5406 | CAM_BDR_SENT, |
5407 | "Bus Device Reset Received" , |
5408 | /*verbose_level*/0); |
5409 | ahd_restart(ahd); |
5410 | done = MSGLOOP_TERMINATED; |
5411 | break; |
5412 | case ABORT_TASK: |
5413 | case ABORT_TASK_SET: |
5414 | case CLEAR_TASK_SET: |
5415 | { |
5416 | int tag; |
5417 | |
5418 | /* Target mode messages */ |
5419 | if (devinfo->role != ROLE_TARGET) { |
5420 | reject = TRUE; |
5421 | break; |
5422 | } |
5423 | tag = SCB_LIST_NULL; |
5424 | if (ahd->msgin_buf[0] == ABORT_TASK) |
5425 | tag = ahd_inb(ahd, INITIATOR_TAG); |
5426 | ahd_abort_scbs(ahd, devinfo->target, devinfo->channel, |
5427 | devinfo->lun, tag, ROLE_TARGET, |
5428 | CAM_REQ_ABORTED); |
5429 | |
5430 | tstate = ahd->enabled_targets[devinfo->our_scsiid]; |
5431 | if (tstate != NULL) { |
5432 | struct ahd_tmode_lstate* lstate; |
5433 | |
5434 | lstate = tstate->enabled_luns[devinfo->lun]; |
5435 | if (lstate != NULL) { |
5436 | ahd_queue_lstate_event(ahd, lstate, |
5437 | devinfo->our_scsiid, |
5438 | ahd->msgin_buf[0], |
5439 | /*arg*/tag); |
5440 | ahd_send_lstate_events(ahd, lstate); |
5441 | } |
5442 | } |
5443 | ahd_restart(ahd); |
5444 | done = MSGLOOP_TERMINATED; |
5445 | break; |
5446 | } |
5447 | #endif |
5448 | case QAS_REQUEST: |
5449 | #ifdef AHD_DEBUG |
5450 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) |
5451 | printk("%s: QAS request. SCSISIGI == 0x%x\n" , |
5452 | ahd_name(ahd), ahd_inb(ahd, SCSISIGI)); |
5453 | #endif |
5454 | ahd->msg_flags |= MSG_FLAG_EXPECT_QASREJ_BUSFREE; |
5455 | fallthrough; |
5456 | case TERMINATE_IO_PROC: |
5457 | default: |
5458 | reject = TRUE; |
5459 | break; |
5460 | } |
5461 | |
5462 | if (reject) { |
5463 | /* |
5464 | * Setup to reject the message. |
5465 | */ |
5466 | ahd->msgout_index = 0; |
5467 | ahd->msgout_len = 1; |
5468 | ahd->msgout_buf[0] = MESSAGE_REJECT; |
5469 | done = MSGLOOP_MSGCOMPLETE; |
5470 | response = TRUE; |
5471 | } |
5472 | |
5473 | if (done != MSGLOOP_IN_PROG && !response) |
5474 | /* Clear the outgoing message buffer */ |
5475 | ahd->msgout_len = 0; |
5476 | |
5477 | return (done); |
5478 | } |
5479 | |
5480 | /* |
5481 | * Process a message reject message. |
5482 | */ |
5483 | static int |
5484 | ahd_handle_msg_reject(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
5485 | { |
5486 | /* |
5487 | * What we care about here is if we had an |
5488 | * outstanding SDTR or WDTR message for this |
5489 | * target. If we did, this is a signal that |
5490 | * the target is refusing negotiation. |
5491 | */ |
5492 | struct scb *scb; |
5493 | struct ahd_initiator_tinfo *tinfo; |
5494 | struct ahd_tmode_tstate *tstate; |
5495 | u_int scb_index; |
5496 | u_int last_msg; |
5497 | int response = 0; |
5498 | |
5499 | scb_index = ahd_get_scbptr(ahd); |
5500 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
5501 | tinfo = ahd_fetch_transinfo(ahd, channel: devinfo->channel, |
5502 | our_id: devinfo->our_scsiid, |
5503 | remote_id: devinfo->target, tstate: &tstate); |
5504 | /* Might be necessary */ |
5505 | last_msg = ahd_inb(ahd, LAST_MSG); |
5506 | |
5507 | if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_PPR, /*full*/FALSE)) { |
5508 | if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_PPR, /*full*/TRUE) |
5509 | && tinfo->goal.period <= AHD_SYNCRATE_PACED) { |
5510 | /* |
5511 | * Target may not like our SPI-4 PPR Options. |
5512 | * Attempt to negotiate 80MHz which will turn |
5513 | * off these options. |
5514 | */ |
5515 | if (bootverbose) { |
5516 | printk("(%s:%c:%d:%d): PPR Rejected. " |
5517 | "Trying simple U160 PPR\n" , |
5518 | ahd_name(ahd), devinfo->channel, |
5519 | devinfo->target, devinfo->lun); |
5520 | } |
5521 | tinfo->goal.period = AHD_SYNCRATE_DT; |
5522 | tinfo->goal.ppr_options &= MSG_EXT_PPR_IU_REQ |
5523 | | MSG_EXT_PPR_QAS_REQ |
5524 | | MSG_EXT_PPR_DT_REQ; |
5525 | } else { |
5526 | /* |
5527 | * Target does not support the PPR message. |
5528 | * Attempt to negotiate SPI-2 style. |
5529 | */ |
5530 | if (bootverbose) { |
5531 | printk("(%s:%c:%d:%d): PPR Rejected. " |
5532 | "Trying WDTR/SDTR\n" , |
5533 | ahd_name(ahd), devinfo->channel, |
5534 | devinfo->target, devinfo->lun); |
5535 | } |
5536 | tinfo->goal.ppr_options = 0; |
5537 | tinfo->curr.transport_version = 2; |
5538 | tinfo->goal.transport_version = 2; |
5539 | } |
5540 | ahd->msgout_index = 0; |
5541 | ahd->msgout_len = 0; |
5542 | ahd_build_transfer_msg(ahd, devinfo); |
5543 | ahd->msgout_index = 0; |
5544 | response = 1; |
5545 | } else if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_WDTR, /*full*/FALSE)) { |
5546 | |
5547 | /* note 8bit xfers */ |
5548 | printk("(%s:%c:%d:%d): refuses WIDE negotiation. Using " |
5549 | "8bit transfers\n" , ahd_name(ahd), |
5550 | devinfo->channel, devinfo->target, devinfo->lun); |
5551 | ahd_set_width(ahd, devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
5552 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5553 | /*paused*/TRUE); |
5554 | /* |
5555 | * No need to clear the sync rate. If the target |
5556 | * did not accept the command, our syncrate is |
5557 | * unaffected. If the target started the negotiation, |
5558 | * but rejected our response, we already cleared the |
5559 | * sync rate before sending our WDTR. |
5560 | */ |
5561 | if (tinfo->goal.offset != tinfo->curr.offset) { |
5562 | |
5563 | /* Start the sync negotiation */ |
5564 | ahd->msgout_index = 0; |
5565 | ahd->msgout_len = 0; |
5566 | ahd_build_transfer_msg(ahd, devinfo); |
5567 | ahd->msgout_index = 0; |
5568 | response = 1; |
5569 | } |
5570 | } else if (ahd_sent_msg(ahd, type: AHDMSG_EXT, EXTENDED_SDTR, /*full*/FALSE)) { |
5571 | /* note asynch xfers and clear flag */ |
5572 | ahd_set_syncrate(ahd, devinfo, /*period*/0, |
5573 | /*offset*/0, /*ppr_options*/0, |
5574 | AHD_TRANS_ACTIVE|AHD_TRANS_GOAL, |
5575 | /*paused*/TRUE); |
5576 | printk("(%s:%c:%d:%d): refuses synchronous negotiation. " |
5577 | "Using asynchronous transfers\n" , |
5578 | ahd_name(ahd), devinfo->channel, |
5579 | devinfo->target, devinfo->lun); |
5580 | } else if ((scb->hscb->control & SIMPLE_QUEUE_TAG) != 0) { |
5581 | int tag_type; |
5582 | int mask; |
5583 | |
5584 | tag_type = (scb->hscb->control & SIMPLE_QUEUE_TAG); |
5585 | |
5586 | if (tag_type == SIMPLE_QUEUE_TAG) { |
5587 | printk("(%s:%c:%d:%d): refuses tagged commands. " |
5588 | "Performing non-tagged I/O\n" , ahd_name(ahd), |
5589 | devinfo->channel, devinfo->target, devinfo->lun); |
5590 | ahd_set_tags(ahd, cmd: scb->io_ctx, devinfo, alg: AHD_QUEUE_NONE); |
5591 | mask = ~0x23; |
5592 | } else { |
5593 | printk("(%s:%c:%d:%d): refuses %s tagged commands. " |
5594 | "Performing simple queue tagged I/O only\n" , |
5595 | ahd_name(ahd), devinfo->channel, devinfo->target, |
5596 | devinfo->lun, tag_type == ORDERED_QUEUE_TAG |
5597 | ? "ordered" : "head of queue" ); |
5598 | ahd_set_tags(ahd, cmd: scb->io_ctx, devinfo, alg: AHD_QUEUE_BASIC); |
5599 | mask = ~0x03; |
5600 | } |
5601 | |
5602 | /* |
5603 | * Resend the identify for this CCB as the target |
5604 | * may believe that the selection is invalid otherwise. |
5605 | */ |
5606 | ahd_outb(ahd, SCB_CONTROL, |
5607 | ahd_inb_scbram(ahd, SCB_CONTROL) & mask); |
5608 | scb->hscb->control &= mask; |
5609 | ahd_set_transaction_tag(scb, /*enabled*/FALSE, |
5610 | /*type*/SIMPLE_QUEUE_TAG); |
5611 | ahd_outb(ahd, MSG_OUT, MSG_IDENTIFYFLAG); |
5612 | ahd_assert_atn(ahd); |
5613 | ahd_busy_tcl(ahd, BUILD_TCL(scb->hscb->scsiid, devinfo->lun), |
5614 | SCB_GET_TAG(scb)); |
5615 | |
5616 | /* |
5617 | * Requeue all tagged commands for this target |
5618 | * currently in our possession so they can be |
5619 | * converted to untagged commands. |
5620 | */ |
5621 | ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb), |
5622 | SCB_GET_CHANNEL(ahd, scb), |
5623 | SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL, |
5624 | ROLE_INITIATOR, CAM_REQUEUE_REQ, |
5625 | SEARCH_COMPLETE); |
5626 | } else if (ahd_sent_msg(ahd, type: AHDMSG_1B, MSG_IDENTIFYFLAG, TRUE)) { |
5627 | /* |
5628 | * Most likely the device believes that we had |
5629 | * previously negotiated packetized. |
5630 | */ |
5631 | ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE |
5632 | | MSG_FLAG_IU_REQ_CHANGED; |
5633 | |
5634 | ahd_force_renegotiation(ahd, devinfo); |
5635 | ahd->msgout_index = 0; |
5636 | ahd->msgout_len = 0; |
5637 | ahd_build_transfer_msg(ahd, devinfo); |
5638 | ahd->msgout_index = 0; |
5639 | response = 1; |
5640 | } else { |
5641 | /* |
5642 | * Otherwise, we ignore it. |
5643 | */ |
5644 | printk("%s:%c:%d: Message reject for %x -- ignored\n" , |
5645 | ahd_name(ahd), devinfo->channel, devinfo->target, |
5646 | last_msg); |
5647 | } |
5648 | return (response); |
5649 | } |
5650 | |
5651 | /* |
5652 | * Process an ingnore wide residue message. |
5653 | */ |
5654 | static void |
5655 | ahd_handle_ign_wide_residue(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
5656 | { |
5657 | u_int scb_index; |
5658 | struct scb *scb; |
5659 | |
5660 | scb_index = ahd_get_scbptr(ahd); |
5661 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
5662 | /* |
5663 | * XXX Actually check data direction in the sequencer? |
5664 | * Perhaps add datadir to some spare bits in the hscb? |
5665 | */ |
5666 | if ((ahd_inb(ahd, SEQ_FLAGS) & DPHASE) == 0 |
5667 | || ahd_get_transfer_dir(scb) != CAM_DIR_IN) { |
5668 | /* |
5669 | * Ignore the message if we haven't |
5670 | * seen an appropriate data phase yet. |
5671 | */ |
5672 | } else { |
5673 | /* |
5674 | * If the residual occurred on the last |
5675 | * transfer and the transfer request was |
5676 | * expected to end on an odd count, do |
5677 | * nothing. Otherwise, subtract a byte |
5678 | * and update the residual count accordingly. |
5679 | */ |
5680 | uint32_t sgptr; |
5681 | |
5682 | sgptr = ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR); |
5683 | if ((sgptr & SG_LIST_NULL) != 0 |
5684 | && (ahd_inb_scbram(ahd, SCB_TASK_ATTRIBUTE) |
5685 | & SCB_XFERLEN_ODD) != 0) { |
5686 | /* |
5687 | * If the residual occurred on the last |
5688 | * transfer and the transfer request was |
5689 | * expected to end on an odd count, do |
5690 | * nothing. |
5691 | */ |
5692 | } else { |
5693 | uint32_t data_cnt; |
5694 | uint64_t data_addr; |
5695 | uint32_t sglen; |
5696 | |
5697 | /* Pull in the rest of the sgptr */ |
5698 | sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR); |
5699 | data_cnt = ahd_inl_scbram(ahd, SCB_RESIDUAL_DATACNT); |
5700 | if ((sgptr & SG_LIST_NULL) != 0) { |
5701 | /* |
5702 | * The residual data count is not updated |
5703 | * for the command run to completion case. |
5704 | * Explicitly zero the count. |
5705 | */ |
5706 | data_cnt &= ~AHD_SG_LEN_MASK; |
5707 | } |
5708 | data_addr = ahd_inq(ahd, SHADDR); |
5709 | data_cnt += 1; |
5710 | data_addr -= 1; |
5711 | sgptr &= SG_PTR_MASK; |
5712 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) { |
5713 | struct ahd_dma64_seg *sg; |
5714 | |
5715 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
5716 | |
5717 | /* |
5718 | * The residual sg ptr points to the next S/G |
5719 | * to load so we must go back one. |
5720 | */ |
5721 | sg--; |
5722 | sglen = ahd_le32toh(sg->len) & AHD_SG_LEN_MASK; |
5723 | if (sg != scb->sg_list |
5724 | && sglen < (data_cnt & AHD_SG_LEN_MASK)) { |
5725 | |
5726 | sg--; |
5727 | sglen = ahd_le32toh(sg->len); |
5728 | /* |
5729 | * Preserve High Address and SG_LIST |
5730 | * bits while setting the count to 1. |
5731 | */ |
5732 | data_cnt = 1|(sglen&(~AHD_SG_LEN_MASK)); |
5733 | data_addr = ahd_le64toh(sg->addr) |
5734 | + (sglen & AHD_SG_LEN_MASK) |
5735 | - 1; |
5736 | |
5737 | /* |
5738 | * Increment sg so it points to the |
5739 | * "next" sg. |
5740 | */ |
5741 | sg++; |
5742 | sgptr = ahd_sg_virt_to_bus(ahd, scb, |
5743 | sg); |
5744 | } |
5745 | } else { |
5746 | struct ahd_dma_seg *sg; |
5747 | |
5748 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
5749 | |
5750 | /* |
5751 | * The residual sg ptr points to the next S/G |
5752 | * to load so we must go back one. |
5753 | */ |
5754 | sg--; |
5755 | sglen = ahd_le32toh(sg->len) & AHD_SG_LEN_MASK; |
5756 | if (sg != scb->sg_list |
5757 | && sglen < (data_cnt & AHD_SG_LEN_MASK)) { |
5758 | |
5759 | sg--; |
5760 | sglen = ahd_le32toh(sg->len); |
5761 | /* |
5762 | * Preserve High Address and SG_LIST |
5763 | * bits while setting the count to 1. |
5764 | */ |
5765 | data_cnt = 1|(sglen&(~AHD_SG_LEN_MASK)); |
5766 | data_addr = ahd_le32toh(sg->addr) |
5767 | + (sglen & AHD_SG_LEN_MASK) |
5768 | - 1; |
5769 | |
5770 | /* |
5771 | * Increment sg so it points to the |
5772 | * "next" sg. |
5773 | */ |
5774 | sg++; |
5775 | sgptr = ahd_sg_virt_to_bus(ahd, scb, |
5776 | sg); |
5777 | } |
5778 | } |
5779 | /* |
5780 | * Toggle the "oddness" of the transfer length |
5781 | * to handle this mid-transfer ignore wide |
5782 | * residue. This ensures that the oddness is |
5783 | * correct for subsequent data transfers. |
5784 | */ |
5785 | ahd_outb(ahd, SCB_TASK_ATTRIBUTE, |
5786 | ahd_inb_scbram(ahd, SCB_TASK_ATTRIBUTE) |
5787 | ^ SCB_XFERLEN_ODD); |
5788 | |
5789 | ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr); |
5790 | ahd_outl(ahd, SCB_RESIDUAL_DATACNT, data_cnt); |
5791 | /* |
5792 | * The FIFO's pointers will be updated if/when the |
5793 | * sequencer re-enters a data phase. |
5794 | */ |
5795 | } |
5796 | } |
5797 | } |
5798 | |
5799 | |
5800 | /* |
5801 | * Reinitialize the data pointers for the active transfer |
5802 | * based on its current residual. |
5803 | */ |
5804 | static void |
5805 | ahd_reinitialize_dataptrs(struct ahd_softc *ahd) |
5806 | { |
5807 | struct scb *scb; |
5808 | ahd_mode_state saved_modes; |
5809 | u_int scb_index; |
5810 | u_int wait; |
5811 | uint32_t sgptr; |
5812 | uint32_t resid; |
5813 | uint64_t dataptr; |
5814 | |
5815 | AHD_ASSERT_MODES(ahd, AHD_MODE_DFF0_MSK|AHD_MODE_DFF1_MSK, |
5816 | AHD_MODE_DFF0_MSK|AHD_MODE_DFF1_MSK); |
5817 | |
5818 | scb_index = ahd_get_scbptr(ahd); |
5819 | scb = ahd_lookup_scb(ahd, tag: scb_index); |
5820 | |
5821 | /* |
5822 | * Release and reacquire the FIFO so we |
5823 | * have a clean slate. |
5824 | */ |
5825 | ahd_outb(ahd, DFFSXFRCTL, CLRCHN); |
5826 | wait = 1000; |
5827 | while (--wait && !(ahd_inb(ahd, MDFFSTAT) & FIFOFREE)) |
5828 | ahd_delay(100); |
5829 | if (wait == 0) { |
5830 | ahd_print_path(ahd, scb); |
5831 | printk("ahd_reinitialize_dataptrs: Forcing FIFO free.\n" ); |
5832 | ahd_outb(ahd, DFFSXFRCTL, RSTCHN|CLRSHCNT); |
5833 | } |
5834 | saved_modes = ahd_save_modes(ahd); |
5835 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
5836 | ahd_outb(ahd, DFFSTAT, |
5837 | ahd_inb(ahd, DFFSTAT) |
5838 | | (saved_modes == 0x11 ? CURRFIFO_1 : CURRFIFO_0)); |
5839 | |
5840 | /* |
5841 | * Determine initial values for data_addr and data_cnt |
5842 | * for resuming the data phase. |
5843 | */ |
5844 | sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR); |
5845 | sgptr &= SG_PTR_MASK; |
5846 | |
5847 | resid = (ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT + 2) << 16) |
5848 | | (ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT + 1) << 8) |
5849 | | ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT); |
5850 | |
5851 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) { |
5852 | struct ahd_dma64_seg *sg; |
5853 | |
5854 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
5855 | |
5856 | /* The residual sg_ptr always points to the next sg */ |
5857 | sg--; |
5858 | |
5859 | dataptr = ahd_le64toh(sg->addr) |
5860 | + (ahd_le32toh(sg->len) & AHD_SG_LEN_MASK) |
5861 | - resid; |
5862 | ahd_outl(ahd, HADDR + 4, dataptr >> 32); |
5863 | } else { |
5864 | struct ahd_dma_seg *sg; |
5865 | |
5866 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: sgptr); |
5867 | |
5868 | /* The residual sg_ptr always points to the next sg */ |
5869 | sg--; |
5870 | |
5871 | dataptr = ahd_le32toh(sg->addr) |
5872 | + (ahd_le32toh(sg->len) & AHD_SG_LEN_MASK) |
5873 | - resid; |
5874 | ahd_outb(ahd, HADDR + 4, |
5875 | (ahd_le32toh(sg->len) & ~AHD_SG_LEN_MASK) >> 24); |
5876 | } |
5877 | ahd_outl(ahd, HADDR, dataptr); |
5878 | ahd_outb(ahd, HCNT + 2, resid >> 16); |
5879 | ahd_outb(ahd, HCNT + 1, resid >> 8); |
5880 | ahd_outb(ahd, HCNT, resid); |
5881 | } |
5882 | |
5883 | /* |
5884 | * Handle the effects of issuing a bus device reset message. |
5885 | */ |
5886 | static void |
5887 | ahd_handle_devreset(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
5888 | u_int lun, cam_status status, char *message, |
5889 | int verbose_level) |
5890 | { |
5891 | #ifdef AHD_TARGET_MODE |
5892 | struct ahd_tmode_tstate* tstate; |
5893 | #endif |
5894 | int found; |
5895 | |
5896 | found = ahd_abort_scbs(ahd, target: devinfo->target, channel: devinfo->channel, |
5897 | lun, SCB_LIST_NULL, role: devinfo->role, |
5898 | status); |
5899 | |
5900 | #ifdef AHD_TARGET_MODE |
5901 | /* |
5902 | * Send an immediate notify ccb to all target mord peripheral |
5903 | * drivers affected by this action. |
5904 | */ |
5905 | tstate = ahd->enabled_targets[devinfo->our_scsiid]; |
5906 | if (tstate != NULL) { |
5907 | u_int cur_lun; |
5908 | u_int max_lun; |
5909 | |
5910 | if (lun != CAM_LUN_WILDCARD) { |
5911 | cur_lun = 0; |
5912 | max_lun = AHD_NUM_LUNS - 1; |
5913 | } else { |
5914 | cur_lun = lun; |
5915 | max_lun = lun; |
5916 | } |
5917 | for (;cur_lun <= max_lun; cur_lun++) { |
5918 | struct ahd_tmode_lstate* lstate; |
5919 | |
5920 | lstate = tstate->enabled_luns[cur_lun]; |
5921 | if (lstate == NULL) |
5922 | continue; |
5923 | |
5924 | ahd_queue_lstate_event(ahd, lstate, devinfo->our_scsiid, |
5925 | TARGET_RESET, /*arg*/0); |
5926 | ahd_send_lstate_events(ahd, lstate); |
5927 | } |
5928 | } |
5929 | #endif |
5930 | |
5931 | /* |
5932 | * Go back to async/narrow transfers and renegotiate. |
5933 | */ |
5934 | ahd_set_width(ahd, devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
5935 | AHD_TRANS_CUR, /*paused*/TRUE); |
5936 | ahd_set_syncrate(ahd, devinfo, /*period*/0, /*offset*/0, |
5937 | /*ppr_options*/0, AHD_TRANS_CUR, |
5938 | /*paused*/TRUE); |
5939 | |
5940 | if (status != CAM_SEL_TIMEOUT) |
5941 | ahd_send_async(ahd, channel: devinfo->channel, target: devinfo->target, |
5942 | CAM_LUN_WILDCARD, AC_SENT_BDR); |
5943 | |
5944 | if (message != NULL && bootverbose) |
5945 | printk("%s: %s on %c:%d. %d SCBs aborted\n" , ahd_name(ahd), |
5946 | message, devinfo->channel, devinfo->target, found); |
5947 | } |
5948 | |
5949 | #ifdef AHD_TARGET_MODE |
5950 | static void |
5951 | ahd_setup_target_msgin(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, |
5952 | struct scb *scb) |
5953 | { |
5954 | |
5955 | /* |
5956 | * To facilitate adding multiple messages together, |
5957 | * each routine should increment the index and len |
5958 | * variables instead of setting them explicitly. |
5959 | */ |
5960 | ahd->msgout_index = 0; |
5961 | ahd->msgout_len = 0; |
5962 | |
5963 | if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0) |
5964 | ahd_build_transfer_msg(ahd, devinfo); |
5965 | else |
5966 | panic("ahd_intr: AWAITING target message with no message" ); |
5967 | |
5968 | ahd->msgout_index = 0; |
5969 | ahd->msg_type = MSG_TYPE_TARGET_MSGIN; |
5970 | } |
5971 | #endif |
5972 | /**************************** Initialization **********************************/ |
5973 | static u_int |
5974 | ahd_sglist_size(struct ahd_softc *ahd) |
5975 | { |
5976 | bus_size_t list_size; |
5977 | |
5978 | list_size = sizeof(struct ahd_dma_seg) * AHD_NSEG; |
5979 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) |
5980 | list_size = sizeof(struct ahd_dma64_seg) * AHD_NSEG; |
5981 | return (list_size); |
5982 | } |
5983 | |
5984 | /* |
5985 | * Calculate the optimum S/G List allocation size. S/G elements used |
5986 | * for a given transaction must be physically contiguous. Assume the |
5987 | * OS will allocate full pages to us, so it doesn't make sense to request |
5988 | * less than a page. |
5989 | */ |
5990 | static u_int |
5991 | ahd_sglist_allocsize(struct ahd_softc *ahd) |
5992 | { |
5993 | bus_size_t sg_list_increment; |
5994 | bus_size_t sg_list_size; |
5995 | bus_size_t max_list_size; |
5996 | bus_size_t best_list_size; |
5997 | |
5998 | /* Start out with the minimum required for AHD_NSEG. */ |
5999 | sg_list_increment = ahd_sglist_size(ahd); |
6000 | sg_list_size = sg_list_increment; |
6001 | |
6002 | /* Get us as close as possible to a page in size. */ |
6003 | while ((sg_list_size + sg_list_increment) <= PAGE_SIZE) |
6004 | sg_list_size += sg_list_increment; |
6005 | |
6006 | /* |
6007 | * Try to reduce the amount of wastage by allocating |
6008 | * multiple pages. |
6009 | */ |
6010 | best_list_size = sg_list_size; |
6011 | max_list_size = roundup(sg_list_increment, PAGE_SIZE); |
6012 | if (max_list_size < 4 * PAGE_SIZE) |
6013 | max_list_size = 4 * PAGE_SIZE; |
6014 | if (max_list_size > (AHD_SCB_MAX_ALLOC * sg_list_increment)) |
6015 | max_list_size = (AHD_SCB_MAX_ALLOC * sg_list_increment); |
6016 | while ((sg_list_size + sg_list_increment) <= max_list_size |
6017 | && (sg_list_size % PAGE_SIZE) != 0) { |
6018 | bus_size_t new_mod; |
6019 | bus_size_t best_mod; |
6020 | |
6021 | sg_list_size += sg_list_increment; |
6022 | new_mod = sg_list_size % PAGE_SIZE; |
6023 | best_mod = best_list_size % PAGE_SIZE; |
6024 | if (new_mod > best_mod || new_mod == 0) { |
6025 | best_list_size = sg_list_size; |
6026 | } |
6027 | } |
6028 | return (best_list_size); |
6029 | } |
6030 | |
6031 | /* |
6032 | * Allocate a controller structure for a new device |
6033 | * and perform initial initializion. |
6034 | */ |
6035 | struct ahd_softc * |
6036 | ahd_alloc(void *platform_arg, char *name) |
6037 | { |
6038 | struct ahd_softc *ahd; |
6039 | |
6040 | ahd = kzalloc(size: sizeof(*ahd), GFP_ATOMIC); |
6041 | if (!ahd) { |
6042 | printk("aic7xxx: cannot malloc softc!\n" ); |
6043 | kfree(objp: name); |
6044 | return NULL; |
6045 | } |
6046 | |
6047 | ahd->seep_config = kmalloc(size: sizeof(*ahd->seep_config), GFP_ATOMIC); |
6048 | if (ahd->seep_config == NULL) { |
6049 | kfree(objp: ahd); |
6050 | kfree(objp: name); |
6051 | return (NULL); |
6052 | } |
6053 | LIST_INIT(&ahd->pending_scbs); |
6054 | /* We don't know our unit number until the OSM sets it */ |
6055 | ahd->name = name; |
6056 | ahd->unit = -1; |
6057 | ahd->description = NULL; |
6058 | ahd->bus_description = NULL; |
6059 | ahd->channel = 'A'; |
6060 | ahd->chip = AHD_NONE; |
6061 | ahd->features = AHD_FENONE; |
6062 | ahd->bugs = AHD_BUGNONE; |
6063 | ahd->flags = AHD_SPCHK_ENB_A|AHD_RESET_BUS_A|AHD_TERM_ENB_A |
6064 | | AHD_EXTENDED_TRANS_A|AHD_STPWLEVEL_A; |
6065 | timer_setup(&ahd->stat_timer, ahd_stat_timer, 0); |
6066 | ahd->int_coalescing_timer = AHD_INT_COALESCING_TIMER_DEFAULT; |
6067 | ahd->int_coalescing_maxcmds = AHD_INT_COALESCING_MAXCMDS_DEFAULT; |
6068 | ahd->int_coalescing_mincmds = AHD_INT_COALESCING_MINCMDS_DEFAULT; |
6069 | ahd->int_coalescing_threshold = AHD_INT_COALESCING_THRESHOLD_DEFAULT; |
6070 | ahd->int_coalescing_stop_threshold = |
6071 | AHD_INT_COALESCING_STOP_THRESHOLD_DEFAULT; |
6072 | |
6073 | #ifdef AHD_DEBUG |
6074 | if ((ahd_debug & AHD_SHOW_MEMORY) != 0) { |
6075 | printk("%s: scb size = 0x%x, hscb size = 0x%x\n" , |
6076 | ahd_name(ahd), (u_int)sizeof(struct scb), |
6077 | (u_int)sizeof(struct hardware_scb)); |
6078 | } |
6079 | #endif |
6080 | if (ahd_platform_alloc(ahd, platform_arg) != 0) { |
6081 | ahd_free(ahd); |
6082 | ahd = NULL; |
6083 | } |
6084 | return (ahd); |
6085 | } |
6086 | |
6087 | int |
6088 | ahd_softc_init(struct ahd_softc *ahd) |
6089 | { |
6090 | |
6091 | ahd->unpause = 0; |
6092 | ahd->pause = PAUSE; |
6093 | return (0); |
6094 | } |
6095 | |
6096 | void |
6097 | ahd_set_unit(struct ahd_softc *ahd, int unit) |
6098 | { |
6099 | ahd->unit = unit; |
6100 | } |
6101 | |
6102 | void |
6103 | ahd_set_name(struct ahd_softc *ahd, char *name) |
6104 | { |
6105 | kfree(objp: ahd->name); |
6106 | ahd->name = name; |
6107 | } |
6108 | |
6109 | void |
6110 | ahd_free(struct ahd_softc *ahd) |
6111 | { |
6112 | int i; |
6113 | |
6114 | switch (ahd->init_level) { |
6115 | default: |
6116 | case 5: |
6117 | ahd_shutdown(arg: ahd); |
6118 | fallthrough; |
6119 | case 4: |
6120 | ahd_dmamap_unload(ahd, ahd->shared_data_dmat, |
6121 | ahd->shared_data_map.dmamap); |
6122 | fallthrough; |
6123 | case 3: |
6124 | ahd_dmamem_free(ahd, ahd->shared_data_dmat, ahd->qoutfifo, |
6125 | ahd->shared_data_map.dmamap); |
6126 | ahd_dmamap_destroy(ahd, ahd->shared_data_dmat, |
6127 | ahd->shared_data_map.dmamap); |
6128 | fallthrough; |
6129 | case 2: |
6130 | ahd_dma_tag_destroy(ahd, ahd->shared_data_dmat); |
6131 | break; |
6132 | case 1: |
6133 | break; |
6134 | case 0: |
6135 | break; |
6136 | } |
6137 | |
6138 | ahd_platform_free(ahd); |
6139 | ahd_fini_scbdata(ahd); |
6140 | for (i = 0; i < AHD_NUM_TARGETS; i++) { |
6141 | struct ahd_tmode_tstate *tstate; |
6142 | |
6143 | tstate = ahd->enabled_targets[i]; |
6144 | if (tstate != NULL) { |
6145 | #ifdef AHD_TARGET_MODE |
6146 | int j; |
6147 | |
6148 | for (j = 0; j < AHD_NUM_LUNS; j++) { |
6149 | struct ahd_tmode_lstate *lstate; |
6150 | |
6151 | lstate = tstate->enabled_luns[j]; |
6152 | if (lstate != NULL) { |
6153 | xpt_free_path(lstate->path); |
6154 | kfree(lstate); |
6155 | } |
6156 | } |
6157 | #endif |
6158 | kfree(objp: tstate); |
6159 | } |
6160 | } |
6161 | #ifdef AHD_TARGET_MODE |
6162 | if (ahd->black_hole != NULL) { |
6163 | xpt_free_path(ahd->black_hole->path); |
6164 | kfree(ahd->black_hole); |
6165 | } |
6166 | #endif |
6167 | kfree(objp: ahd->name); |
6168 | kfree(objp: ahd->seep_config); |
6169 | kfree(objp: ahd->saved_stack); |
6170 | kfree(objp: ahd); |
6171 | return; |
6172 | } |
6173 | |
6174 | static void |
6175 | ahd_shutdown(void *arg) |
6176 | { |
6177 | struct ahd_softc *ahd; |
6178 | |
6179 | ahd = (struct ahd_softc *)arg; |
6180 | |
6181 | /* |
6182 | * Stop periodic timer callbacks. |
6183 | */ |
6184 | del_timer_sync(timer: &ahd->stat_timer); |
6185 | |
6186 | /* This will reset most registers to 0, but not all */ |
6187 | ahd_reset(ahd, /*reinit*/FALSE); |
6188 | } |
6189 | |
6190 | /* |
6191 | * Reset the controller and record some information about it |
6192 | * that is only available just after a reset. If "reinit" is |
6193 | * non-zero, this reset occurred after initial configuration |
6194 | * and the caller requests that the chip be fully reinitialized |
6195 | * to a runable state. Chip interrupts are *not* enabled after |
6196 | * a reinitialization. The caller must enable interrupts via |
6197 | * ahd_intr_enable(). |
6198 | */ |
6199 | int |
6200 | ahd_reset(struct ahd_softc *ahd, int reinit) |
6201 | { |
6202 | u_int sxfrctl1; |
6203 | int wait; |
6204 | uint32_t cmd; |
6205 | |
6206 | /* |
6207 | * Preserve the value of the SXFRCTL1 register for all channels. |
6208 | * It contains settings that affect termination and we don't want |
6209 | * to disturb the integrity of the bus. |
6210 | */ |
6211 | ahd_pause(ahd); |
6212 | ahd_update_modes(ahd); |
6213 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
6214 | sxfrctl1 = ahd_inb(ahd, SXFRCTL1); |
6215 | |
6216 | cmd = ahd_pci_read_config(pci: ahd->dev_softc, PCIR_COMMAND, /*bytes*/width: 2); |
6217 | if ((ahd->bugs & AHD_PCIX_CHIPRST_BUG) != 0) { |
6218 | uint32_t mod_cmd; |
6219 | |
6220 | /* |
6221 | * A4 Razor #632 |
6222 | * During the assertion of CHIPRST, the chip |
6223 | * does not disable its parity logic prior to |
6224 | * the start of the reset. This may cause a |
6225 | * parity error to be detected and thus a |
6226 | * spurious SERR or PERR assertion. Disable |
6227 | * PERR and SERR responses during the CHIPRST. |
6228 | */ |
6229 | mod_cmd = cmd & ~(PCIM_CMD_PERRESPEN|PCIM_CMD_SERRESPEN); |
6230 | ahd_pci_write_config(pci: ahd->dev_softc, PCIR_COMMAND, |
6231 | value: mod_cmd, /*bytes*/width: 2); |
6232 | } |
6233 | ahd_outb(ahd, HCNTRL, CHIPRST | ahd->pause); |
6234 | |
6235 | /* |
6236 | * Ensure that the reset has finished. We delay 1000us |
6237 | * prior to reading the register to make sure the chip |
6238 | * has sufficiently completed its reset to handle register |
6239 | * accesses. |
6240 | */ |
6241 | wait = 1000; |
6242 | do { |
6243 | ahd_delay(1000); |
6244 | } while (--wait && !(ahd_inb(ahd, HCNTRL) & CHIPRSTACK)); |
6245 | |
6246 | if (wait == 0) { |
6247 | printk("%s: WARNING - Failed chip reset! " |
6248 | "Trying to initialize anyway.\n" , ahd_name(ahd)); |
6249 | } |
6250 | ahd_outb(ahd, HCNTRL, ahd->pause); |
6251 | |
6252 | if ((ahd->bugs & AHD_PCIX_CHIPRST_BUG) != 0) { |
6253 | /* |
6254 | * Clear any latched PCI error status and restore |
6255 | * previous SERR and PERR response enables. |
6256 | */ |
6257 | ahd_pci_write_config(pci: ahd->dev_softc, PCIR_STATUS + 1, |
6258 | value: 0xFF, /*bytes*/width: 1); |
6259 | ahd_pci_write_config(pci: ahd->dev_softc, PCIR_COMMAND, |
6260 | value: cmd, /*bytes*/width: 2); |
6261 | } |
6262 | |
6263 | /* |
6264 | * Mode should be SCSI after a chip reset, but lets |
6265 | * set it just to be safe. We touch the MODE_PTR |
6266 | * register directly so as to bypass the lazy update |
6267 | * code in ahd_set_modes(). |
6268 | */ |
6269 | ahd_known_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
6270 | ahd_outb(ahd, MODE_PTR, |
6271 | ahd_build_mode_state(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI)); |
6272 | |
6273 | /* |
6274 | * Restore SXFRCTL1. |
6275 | * |
6276 | * We must always initialize STPWEN to 1 before we |
6277 | * restore the saved values. STPWEN is initialized |
6278 | * to a tri-state condition which can only be cleared |
6279 | * by turning it on. |
6280 | */ |
6281 | ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN); |
6282 | ahd_outb(ahd, SXFRCTL1, sxfrctl1); |
6283 | |
6284 | /* Determine chip configuration */ |
6285 | ahd->features &= ~AHD_WIDE; |
6286 | if ((ahd_inb(ahd, SBLKCTL) & SELWIDE) != 0) |
6287 | ahd->features |= AHD_WIDE; |
6288 | |
6289 | /* |
6290 | * If a recovery action has forced a chip reset, |
6291 | * re-initialize the chip to our liking. |
6292 | */ |
6293 | if (reinit != 0) |
6294 | ahd_chip_init(ahd); |
6295 | |
6296 | return (0); |
6297 | } |
6298 | |
6299 | /* |
6300 | * Determine the number of SCBs available on the controller |
6301 | */ |
6302 | static int |
6303 | ahd_probe_scbs(struct ahd_softc *ahd) { |
6304 | int i; |
6305 | |
6306 | AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK), |
6307 | ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK)); |
6308 | for (i = 0; i < AHD_SCB_MAX; i++) { |
6309 | int j; |
6310 | |
6311 | ahd_set_scbptr(ahd, scbptr: i); |
6312 | ahd_outw(ahd, SCB_BASE, i); |
6313 | for (j = 2; j < 64; j++) |
6314 | ahd_outb(ahd, SCB_BASE+j, 0); |
6315 | /* Start out life as unallocated (needing an abort) */ |
6316 | ahd_outb(ahd, SCB_CONTROL, MK_MESSAGE); |
6317 | if (ahd_inw_scbram(ahd, SCB_BASE) != i) |
6318 | break; |
6319 | ahd_set_scbptr(ahd, scbptr: 0); |
6320 | if (ahd_inw_scbram(ahd, SCB_BASE) != 0) |
6321 | break; |
6322 | } |
6323 | return (i); |
6324 | } |
6325 | |
6326 | static void |
6327 | ahd_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) |
6328 | { |
6329 | dma_addr_t *baddr; |
6330 | |
6331 | baddr = (dma_addr_t *)arg; |
6332 | *baddr = segs->ds_addr; |
6333 | } |
6334 | |
6335 | static void |
6336 | ahd_initialize_hscbs(struct ahd_softc *ahd) |
6337 | { |
6338 | int i; |
6339 | |
6340 | for (i = 0; i < ahd->scb_data.maxhscbs; i++) { |
6341 | ahd_set_scbptr(ahd, scbptr: i); |
6342 | |
6343 | /* Clear the control byte. */ |
6344 | ahd_outb(ahd, SCB_CONTROL, 0); |
6345 | |
6346 | /* Set the next pointer */ |
6347 | ahd_outw(ahd, SCB_NEXT, SCB_LIST_NULL); |
6348 | } |
6349 | } |
6350 | |
6351 | static int |
6352 | ahd_init_scbdata(struct ahd_softc *ahd) |
6353 | { |
6354 | struct scb_data *scb_data; |
6355 | int i; |
6356 | |
6357 | scb_data = &ahd->scb_data; |
6358 | TAILQ_INIT(&scb_data->free_scbs); |
6359 | for (i = 0; i < AHD_NUM_TARGETS * AHD_NUM_LUNS_NONPKT; i++) |
6360 | LIST_INIT(&scb_data->free_scb_lists[i]); |
6361 | LIST_INIT(&scb_data->any_dev_free_scb_list); |
6362 | SLIST_INIT(&scb_data->hscb_maps); |
6363 | SLIST_INIT(&scb_data->sg_maps); |
6364 | SLIST_INIT(&scb_data->sense_maps); |
6365 | |
6366 | /* Determine the number of hardware SCBs and initialize them */ |
6367 | scb_data->maxhscbs = ahd_probe_scbs(ahd); |
6368 | if (scb_data->maxhscbs == 0) { |
6369 | printk("%s: No SCB space found\n" , ahd_name(ahd)); |
6370 | return (ENXIO); |
6371 | } |
6372 | |
6373 | ahd_initialize_hscbs(ahd); |
6374 | |
6375 | /* |
6376 | * Create our DMA tags. These tags define the kinds of device |
6377 | * accessible memory allocations and memory mappings we will |
6378 | * need to perform during normal operation. |
6379 | * |
6380 | * Unless we need to further restrict the allocation, we rely |
6381 | * on the restrictions of the parent dmat, hence the common |
6382 | * use of MAXADDR and MAXSIZE. |
6383 | */ |
6384 | |
6385 | /* DMA tag for our hardware scb structures */ |
6386 | if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1, |
6387 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
6388 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
6389 | /*highaddr*/BUS_SPACE_MAXADDR, |
6390 | /*filter*/NULL, /*filterarg*/NULL, |
6391 | PAGE_SIZE, /*nsegments*/1, |
6392 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
6393 | /*flags*/0, &scb_data->hscb_dmat) != 0) { |
6394 | goto error_exit; |
6395 | } |
6396 | |
6397 | scb_data->init_level++; |
6398 | |
6399 | /* DMA tag for our S/G structures. */ |
6400 | if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/8, |
6401 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
6402 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
6403 | /*highaddr*/BUS_SPACE_MAXADDR, |
6404 | /*filter*/NULL, /*filterarg*/NULL, |
6405 | ahd_sglist_allocsize(ahd), /*nsegments*/1, |
6406 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
6407 | /*flags*/0, &scb_data->sg_dmat) != 0) { |
6408 | goto error_exit; |
6409 | } |
6410 | #ifdef AHD_DEBUG |
6411 | if ((ahd_debug & AHD_SHOW_MEMORY) != 0) |
6412 | printk("%s: ahd_sglist_allocsize = 0x%x\n" , ahd_name(ahd), |
6413 | ahd_sglist_allocsize(ahd)); |
6414 | #endif |
6415 | |
6416 | scb_data->init_level++; |
6417 | |
6418 | /* DMA tag for our sense buffers. We allocate in page sized chunks */ |
6419 | if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1, |
6420 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
6421 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
6422 | /*highaddr*/BUS_SPACE_MAXADDR, |
6423 | /*filter*/NULL, /*filterarg*/NULL, |
6424 | PAGE_SIZE, /*nsegments*/1, |
6425 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
6426 | /*flags*/0, &scb_data->sense_dmat) != 0) { |
6427 | goto error_exit; |
6428 | } |
6429 | |
6430 | scb_data->init_level++; |
6431 | |
6432 | /* Perform initial CCB allocation */ |
6433 | ahd_alloc_scbs(ahd); |
6434 | |
6435 | if (scb_data->numscbs == 0) { |
6436 | printk("%s: ahd_init_scbdata - " |
6437 | "Unable to allocate initial scbs\n" , |
6438 | ahd_name(ahd)); |
6439 | goto error_exit; |
6440 | } |
6441 | |
6442 | /* |
6443 | * Note that we were successful |
6444 | */ |
6445 | return (0); |
6446 | |
6447 | error_exit: |
6448 | |
6449 | return (ENOMEM); |
6450 | } |
6451 | |
6452 | static struct scb * |
6453 | ahd_find_scb_by_tag(struct ahd_softc *ahd, u_int tag) |
6454 | { |
6455 | struct scb *scb; |
6456 | |
6457 | /* |
6458 | * Look on the pending list. |
6459 | */ |
6460 | LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) { |
6461 | if (SCB_GET_TAG(scb) == tag) |
6462 | return (scb); |
6463 | } |
6464 | |
6465 | /* |
6466 | * Then on all of the collision free lists. |
6467 | */ |
6468 | TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) { |
6469 | struct scb *list_scb; |
6470 | |
6471 | list_scb = scb; |
6472 | do { |
6473 | if (SCB_GET_TAG(list_scb) == tag) |
6474 | return (list_scb); |
6475 | list_scb = LIST_NEXT(list_scb, collision_links); |
6476 | } while (list_scb); |
6477 | } |
6478 | |
6479 | /* |
6480 | * And finally on the generic free list. |
6481 | */ |
6482 | LIST_FOREACH(scb, &ahd->scb_data.any_dev_free_scb_list, links.le) { |
6483 | if (SCB_GET_TAG(scb) == tag) |
6484 | return (scb); |
6485 | } |
6486 | |
6487 | return (NULL); |
6488 | } |
6489 | |
6490 | static void |
6491 | ahd_fini_scbdata(struct ahd_softc *ahd) |
6492 | { |
6493 | struct scb_data *scb_data; |
6494 | |
6495 | scb_data = &ahd->scb_data; |
6496 | if (scb_data == NULL) |
6497 | return; |
6498 | |
6499 | switch (scb_data->init_level) { |
6500 | default: |
6501 | case 7: |
6502 | { |
6503 | struct map_node *sns_map; |
6504 | |
6505 | while ((sns_map = SLIST_FIRST(&scb_data->sense_maps)) != NULL) { |
6506 | SLIST_REMOVE_HEAD(&scb_data->sense_maps, links); |
6507 | ahd_dmamap_unload(ahd, scb_data->sense_dmat, |
6508 | sns_map->dmamap); |
6509 | ahd_dmamem_free(ahd, scb_data->sense_dmat, |
6510 | sns_map->vaddr, sns_map->dmamap); |
6511 | kfree(objp: sns_map); |
6512 | } |
6513 | ahd_dma_tag_destroy(ahd, scb_data->sense_dmat); |
6514 | } |
6515 | fallthrough; |
6516 | case 6: |
6517 | { |
6518 | struct map_node *sg_map; |
6519 | |
6520 | while ((sg_map = SLIST_FIRST(&scb_data->sg_maps)) != NULL) { |
6521 | SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); |
6522 | ahd_dmamap_unload(ahd, scb_data->sg_dmat, |
6523 | sg_map->dmamap); |
6524 | ahd_dmamem_free(ahd, scb_data->sg_dmat, |
6525 | sg_map->vaddr, sg_map->dmamap); |
6526 | kfree(objp: sg_map); |
6527 | } |
6528 | ahd_dma_tag_destroy(ahd, scb_data->sg_dmat); |
6529 | } |
6530 | fallthrough; |
6531 | case 5: |
6532 | { |
6533 | struct map_node *hscb_map; |
6534 | |
6535 | while ((hscb_map = SLIST_FIRST(&scb_data->hscb_maps)) != NULL) { |
6536 | SLIST_REMOVE_HEAD(&scb_data->hscb_maps, links); |
6537 | ahd_dmamap_unload(ahd, scb_data->hscb_dmat, |
6538 | hscb_map->dmamap); |
6539 | ahd_dmamem_free(ahd, scb_data->hscb_dmat, |
6540 | hscb_map->vaddr, hscb_map->dmamap); |
6541 | kfree(objp: hscb_map); |
6542 | } |
6543 | ahd_dma_tag_destroy(ahd, scb_data->hscb_dmat); |
6544 | } |
6545 | fallthrough; |
6546 | case 4: |
6547 | case 3: |
6548 | case 2: |
6549 | case 1: |
6550 | case 0: |
6551 | break; |
6552 | } |
6553 | } |
6554 | |
6555 | /* |
6556 | * DSP filter Bypass must be enabled until the first selection |
6557 | * after a change in bus mode (Razor #491 and #493). |
6558 | */ |
6559 | static void |
6560 | ahd_setup_iocell_workaround(struct ahd_softc *ahd) |
6561 | { |
6562 | ahd_mode_state saved_modes; |
6563 | |
6564 | saved_modes = ahd_save_modes(ahd); |
6565 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
6566 | ahd_outb(ahd, DSPDATACTL, ahd_inb(ahd, DSPDATACTL) |
6567 | | BYPASSENAB | RCVROFFSTDIS | XMITOFFSTDIS); |
6568 | ahd_outb(ahd, SIMODE0, ahd_inb(ahd, SIMODE0) | (ENSELDO|ENSELDI)); |
6569 | #ifdef AHD_DEBUG |
6570 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
6571 | printk("%s: Setting up iocell workaround\n" , ahd_name(ahd)); |
6572 | #endif |
6573 | ahd_restore_modes(ahd, state: saved_modes); |
6574 | ahd->flags &= ~AHD_HAD_FIRST_SEL; |
6575 | } |
6576 | |
6577 | static void |
6578 | ahd_iocell_first_selection(struct ahd_softc *ahd) |
6579 | { |
6580 | ahd_mode_state saved_modes; |
6581 | u_int sblkctl; |
6582 | |
6583 | if ((ahd->flags & AHD_HAD_FIRST_SEL) != 0) |
6584 | return; |
6585 | saved_modes = ahd_save_modes(ahd); |
6586 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
6587 | sblkctl = ahd_inb(ahd, SBLKCTL); |
6588 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
6589 | #ifdef AHD_DEBUG |
6590 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
6591 | printk("%s: iocell first selection\n" , ahd_name(ahd)); |
6592 | #endif |
6593 | if ((sblkctl & ENAB40) != 0) { |
6594 | ahd_outb(ahd, DSPDATACTL, |
6595 | ahd_inb(ahd, DSPDATACTL) & ~BYPASSENAB); |
6596 | #ifdef AHD_DEBUG |
6597 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
6598 | printk("%s: BYPASS now disabled\n" , ahd_name(ahd)); |
6599 | #endif |
6600 | } |
6601 | ahd_outb(ahd, SIMODE0, ahd_inb(ahd, SIMODE0) & ~(ENSELDO|ENSELDI)); |
6602 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
6603 | ahd_restore_modes(ahd, state: saved_modes); |
6604 | ahd->flags |= AHD_HAD_FIRST_SEL; |
6605 | } |
6606 | |
6607 | /*************************** SCB Management ***********************************/ |
6608 | static void |
6609 | ahd_add_col_list(struct ahd_softc *ahd, struct scb *scb, u_int col_idx) |
6610 | { |
6611 | struct scb_list *free_list; |
6612 | struct scb_tailq *free_tailq; |
6613 | struct scb *first_scb; |
6614 | |
6615 | scb->flags |= SCB_ON_COL_LIST; |
6616 | AHD_SET_SCB_COL_IDX(scb, col_idx); |
6617 | free_list = &ahd->scb_data.free_scb_lists[col_idx]; |
6618 | free_tailq = &ahd->scb_data.free_scbs; |
6619 | first_scb = LIST_FIRST(free_list); |
6620 | if (first_scb != NULL) { |
6621 | LIST_INSERT_AFTER(first_scb, scb, collision_links); |
6622 | } else { |
6623 | LIST_INSERT_HEAD(free_list, scb, collision_links); |
6624 | TAILQ_INSERT_TAIL(free_tailq, scb, links.tqe); |
6625 | } |
6626 | } |
6627 | |
6628 | static void |
6629 | ahd_rem_col_list(struct ahd_softc *ahd, struct scb *scb) |
6630 | { |
6631 | struct scb_list *free_list; |
6632 | struct scb_tailq *free_tailq; |
6633 | struct scb *first_scb; |
6634 | u_int col_idx; |
6635 | |
6636 | scb->flags &= ~SCB_ON_COL_LIST; |
6637 | col_idx = AHD_GET_SCB_COL_IDX(ahd, scb); |
6638 | free_list = &ahd->scb_data.free_scb_lists[col_idx]; |
6639 | free_tailq = &ahd->scb_data.free_scbs; |
6640 | first_scb = LIST_FIRST(free_list); |
6641 | if (first_scb == scb) { |
6642 | struct scb *next_scb; |
6643 | |
6644 | /* |
6645 | * Maintain order in the collision free |
6646 | * lists for fairness if this device has |
6647 | * other colliding tags active. |
6648 | */ |
6649 | next_scb = LIST_NEXT(scb, collision_links); |
6650 | if (next_scb != NULL) { |
6651 | TAILQ_INSERT_AFTER(free_tailq, scb, |
6652 | next_scb, links.tqe); |
6653 | } |
6654 | TAILQ_REMOVE(free_tailq, scb, links.tqe); |
6655 | } |
6656 | LIST_REMOVE(scb, collision_links); |
6657 | } |
6658 | |
6659 | /* |
6660 | * Get a free scb. If there are none, see if we can allocate a new SCB. |
6661 | */ |
6662 | struct scb * |
6663 | ahd_get_scb(struct ahd_softc *ahd, u_int col_idx) |
6664 | { |
6665 | struct scb *scb; |
6666 | int tries; |
6667 | |
6668 | tries = 0; |
6669 | look_again: |
6670 | TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) { |
6671 | if (AHD_GET_SCB_COL_IDX(ahd, scb) != col_idx) { |
6672 | ahd_rem_col_list(ahd, scb); |
6673 | goto found; |
6674 | } |
6675 | } |
6676 | if ((scb = LIST_FIRST(&ahd->scb_data.any_dev_free_scb_list)) == NULL) { |
6677 | |
6678 | if (tries++ != 0) |
6679 | return (NULL); |
6680 | ahd_alloc_scbs(ahd); |
6681 | goto look_again; |
6682 | } |
6683 | LIST_REMOVE(scb, links.le); |
6684 | if (col_idx != AHD_NEVER_COL_IDX |
6685 | && (scb->col_scb != NULL) |
6686 | && (scb->col_scb->flags & SCB_ACTIVE) == 0) { |
6687 | LIST_REMOVE(scb->col_scb, links.le); |
6688 | ahd_add_col_list(ahd, scb: scb->col_scb, col_idx); |
6689 | } |
6690 | found: |
6691 | scb->flags |= SCB_ACTIVE; |
6692 | return (scb); |
6693 | } |
6694 | |
6695 | /* |
6696 | * Return an SCB resource to the free list. |
6697 | */ |
6698 | void |
6699 | ahd_free_scb(struct ahd_softc *ahd, struct scb *scb) |
6700 | { |
6701 | /* Clean up for the next user */ |
6702 | scb->flags = SCB_FLAG_NONE; |
6703 | scb->hscb->control = 0; |
6704 | ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = NULL; |
6705 | |
6706 | if (scb->col_scb == NULL) { |
6707 | |
6708 | /* |
6709 | * No collision possible. Just free normally. |
6710 | */ |
6711 | LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list, |
6712 | scb, links.le); |
6713 | } else if ((scb->col_scb->flags & SCB_ON_COL_LIST) != 0) { |
6714 | |
6715 | /* |
6716 | * The SCB we might have collided with is on |
6717 | * a free collision list. Put both SCBs on |
6718 | * the generic list. |
6719 | */ |
6720 | ahd_rem_col_list(ahd, scb: scb->col_scb); |
6721 | LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list, |
6722 | scb, links.le); |
6723 | LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list, |
6724 | scb->col_scb, links.le); |
6725 | } else if ((scb->col_scb->flags |
6726 | & (SCB_PACKETIZED|SCB_ACTIVE)) == SCB_ACTIVE |
6727 | && (scb->col_scb->hscb->control & TAG_ENB) != 0) { |
6728 | |
6729 | /* |
6730 | * The SCB we might collide with on the next allocation |
6731 | * is still active in a non-packetized, tagged, context. |
6732 | * Put us on the SCB collision list. |
6733 | */ |
6734 | ahd_add_col_list(ahd, scb, |
6735 | AHD_GET_SCB_COL_IDX(ahd, scb->col_scb)); |
6736 | } else { |
6737 | /* |
6738 | * The SCB we might collide with on the next allocation |
6739 | * is either active in a packetized context, or free. |
6740 | * Since we can't collide, put this SCB on the generic |
6741 | * free list. |
6742 | */ |
6743 | LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list, |
6744 | scb, links.le); |
6745 | } |
6746 | |
6747 | ahd_platform_scb_free(ahd, scb); |
6748 | } |
6749 | |
6750 | static void |
6751 | ahd_alloc_scbs(struct ahd_softc *ahd) |
6752 | { |
6753 | struct scb_data *scb_data; |
6754 | struct scb *next_scb; |
6755 | struct hardware_scb *hscb; |
6756 | struct map_node *hscb_map; |
6757 | struct map_node *sg_map; |
6758 | struct map_node *sense_map; |
6759 | uint8_t *segs; |
6760 | uint8_t *sense_data; |
6761 | dma_addr_t hscb_busaddr; |
6762 | dma_addr_t sg_busaddr; |
6763 | dma_addr_t sense_busaddr; |
6764 | int newcount; |
6765 | int i; |
6766 | |
6767 | scb_data = &ahd->scb_data; |
6768 | if (scb_data->numscbs >= AHD_SCB_MAX_ALLOC) |
6769 | /* Can't allocate any more */ |
6770 | return; |
6771 | |
6772 | if (scb_data->scbs_left != 0) { |
6773 | int offset; |
6774 | |
6775 | offset = (PAGE_SIZE / sizeof(*hscb)) - scb_data->scbs_left; |
6776 | hscb_map = SLIST_FIRST(&scb_data->hscb_maps); |
6777 | hscb = &((struct hardware_scb *)hscb_map->vaddr)[offset]; |
6778 | hscb_busaddr = hscb_map->physaddr + (offset * sizeof(*hscb)); |
6779 | } else { |
6780 | hscb_map = kmalloc(size: sizeof(*hscb_map), GFP_ATOMIC); |
6781 | |
6782 | if (hscb_map == NULL) |
6783 | return; |
6784 | |
6785 | /* Allocate the next batch of hardware SCBs */ |
6786 | if (ahd_dmamem_alloc(ahd, scb_data->hscb_dmat, |
6787 | (void **)&hscb_map->vaddr, |
6788 | BUS_DMA_NOWAIT, &hscb_map->dmamap) != 0) { |
6789 | kfree(objp: hscb_map); |
6790 | return; |
6791 | } |
6792 | |
6793 | SLIST_INSERT_HEAD(&scb_data->hscb_maps, hscb_map, links); |
6794 | |
6795 | ahd_dmamap_load(ahd, scb_data->hscb_dmat, hscb_map->dmamap, |
6796 | hscb_map->vaddr, PAGE_SIZE, ahd_dmamap_cb, |
6797 | &hscb_map->physaddr, /*flags*/0); |
6798 | |
6799 | hscb = (struct hardware_scb *)hscb_map->vaddr; |
6800 | hscb_busaddr = hscb_map->physaddr; |
6801 | scb_data->scbs_left = PAGE_SIZE / sizeof(*hscb); |
6802 | } |
6803 | |
6804 | if (scb_data->sgs_left != 0) { |
6805 | int offset; |
6806 | |
6807 | offset = ((ahd_sglist_allocsize(ahd) / ahd_sglist_size(ahd)) |
6808 | - scb_data->sgs_left) * ahd_sglist_size(ahd); |
6809 | sg_map = SLIST_FIRST(&scb_data->sg_maps); |
6810 | segs = sg_map->vaddr + offset; |
6811 | sg_busaddr = sg_map->physaddr + offset; |
6812 | } else { |
6813 | sg_map = kmalloc(size: sizeof(*sg_map), GFP_ATOMIC); |
6814 | |
6815 | if (sg_map == NULL) |
6816 | return; |
6817 | |
6818 | /* Allocate the next batch of S/G lists */ |
6819 | if (ahd_dmamem_alloc(ahd, scb_data->sg_dmat, |
6820 | (void **)&sg_map->vaddr, |
6821 | BUS_DMA_NOWAIT, &sg_map->dmamap) != 0) { |
6822 | kfree(objp: sg_map); |
6823 | return; |
6824 | } |
6825 | |
6826 | SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); |
6827 | |
6828 | ahd_dmamap_load(ahd, scb_data->sg_dmat, sg_map->dmamap, |
6829 | sg_map->vaddr, ahd_sglist_allocsize(ahd), |
6830 | ahd_dmamap_cb, &sg_map->physaddr, /*flags*/0); |
6831 | |
6832 | segs = sg_map->vaddr; |
6833 | sg_busaddr = sg_map->physaddr; |
6834 | scb_data->sgs_left = |
6835 | ahd_sglist_allocsize(ahd) / ahd_sglist_size(ahd); |
6836 | #ifdef AHD_DEBUG |
6837 | if (ahd_debug & AHD_SHOW_MEMORY) |
6838 | printk("Mapped SG data\n" ); |
6839 | #endif |
6840 | } |
6841 | |
6842 | if (scb_data->sense_left != 0) { |
6843 | int offset; |
6844 | |
6845 | offset = PAGE_SIZE - (AHD_SENSE_BUFSIZE * scb_data->sense_left); |
6846 | sense_map = SLIST_FIRST(&scb_data->sense_maps); |
6847 | sense_data = sense_map->vaddr + offset; |
6848 | sense_busaddr = sense_map->physaddr + offset; |
6849 | } else { |
6850 | sense_map = kmalloc(size: sizeof(*sense_map), GFP_ATOMIC); |
6851 | |
6852 | if (sense_map == NULL) |
6853 | return; |
6854 | |
6855 | /* Allocate the next batch of sense buffers */ |
6856 | if (ahd_dmamem_alloc(ahd, scb_data->sense_dmat, |
6857 | (void **)&sense_map->vaddr, |
6858 | BUS_DMA_NOWAIT, &sense_map->dmamap) != 0) { |
6859 | kfree(objp: sense_map); |
6860 | return; |
6861 | } |
6862 | |
6863 | SLIST_INSERT_HEAD(&scb_data->sense_maps, sense_map, links); |
6864 | |
6865 | ahd_dmamap_load(ahd, scb_data->sense_dmat, sense_map->dmamap, |
6866 | sense_map->vaddr, PAGE_SIZE, ahd_dmamap_cb, |
6867 | &sense_map->physaddr, /*flags*/0); |
6868 | |
6869 | sense_data = sense_map->vaddr; |
6870 | sense_busaddr = sense_map->physaddr; |
6871 | scb_data->sense_left = PAGE_SIZE / AHD_SENSE_BUFSIZE; |
6872 | #ifdef AHD_DEBUG |
6873 | if (ahd_debug & AHD_SHOW_MEMORY) |
6874 | printk("Mapped sense data\n" ); |
6875 | #endif |
6876 | } |
6877 | |
6878 | newcount = min(scb_data->sense_left, scb_data->scbs_left); |
6879 | newcount = min(newcount, scb_data->sgs_left); |
6880 | newcount = min(newcount, (AHD_SCB_MAX_ALLOC - scb_data->numscbs)); |
6881 | for (i = 0; i < newcount; i++) { |
6882 | struct scb_platform_data *pdata; |
6883 | u_int col_tag; |
6884 | |
6885 | next_scb = kmalloc(size: sizeof(*next_scb), GFP_ATOMIC); |
6886 | if (next_scb == NULL) |
6887 | break; |
6888 | |
6889 | pdata = kmalloc(size: sizeof(*pdata), GFP_ATOMIC); |
6890 | if (pdata == NULL) { |
6891 | kfree(objp: next_scb); |
6892 | break; |
6893 | } |
6894 | next_scb->platform_data = pdata; |
6895 | next_scb->hscb_map = hscb_map; |
6896 | next_scb->sg_map = sg_map; |
6897 | next_scb->sense_map = sense_map; |
6898 | next_scb->sg_list = segs; |
6899 | next_scb->sense_data = sense_data; |
6900 | next_scb->sense_busaddr = sense_busaddr; |
6901 | memset(hscb, 0, sizeof(*hscb)); |
6902 | next_scb->hscb = hscb; |
6903 | hscb->hscb_busaddr = ahd_htole32(hscb_busaddr); |
6904 | |
6905 | /* |
6906 | * The sequencer always starts with the second entry. |
6907 | * The first entry is embedded in the scb. |
6908 | */ |
6909 | next_scb->sg_list_busaddr = sg_busaddr; |
6910 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) |
6911 | next_scb->sg_list_busaddr |
6912 | += sizeof(struct ahd_dma64_seg); |
6913 | else |
6914 | next_scb->sg_list_busaddr += sizeof(struct ahd_dma_seg); |
6915 | next_scb->ahd_softc = ahd; |
6916 | next_scb->flags = SCB_FLAG_NONE; |
6917 | next_scb->hscb->tag = ahd_htole16(scb_data->numscbs); |
6918 | col_tag = scb_data->numscbs ^ 0x100; |
6919 | next_scb->col_scb = ahd_find_scb_by_tag(ahd, tag: col_tag); |
6920 | if (next_scb->col_scb != NULL) |
6921 | next_scb->col_scb->col_scb = next_scb; |
6922 | ahd_free_scb(ahd, scb: next_scb); |
6923 | hscb++; |
6924 | hscb_busaddr += sizeof(*hscb); |
6925 | segs += ahd_sglist_size(ahd); |
6926 | sg_busaddr += ahd_sglist_size(ahd); |
6927 | sense_data += AHD_SENSE_BUFSIZE; |
6928 | sense_busaddr += AHD_SENSE_BUFSIZE; |
6929 | scb_data->numscbs++; |
6930 | scb_data->sense_left--; |
6931 | scb_data->scbs_left--; |
6932 | scb_data->sgs_left--; |
6933 | } |
6934 | } |
6935 | |
6936 | void |
6937 | ahd_controller_info(struct ahd_softc *ahd, char *buf) |
6938 | { |
6939 | const char *speed; |
6940 | const char *type; |
6941 | int len; |
6942 | |
6943 | len = sprintf(buf, fmt: "%s: " , ahd_chip_names[ahd->chip & AHD_CHIPID_MASK]); |
6944 | buf += len; |
6945 | |
6946 | speed = "Ultra320 " ; |
6947 | if ((ahd->features & AHD_WIDE) != 0) { |
6948 | type = "Wide " ; |
6949 | } else { |
6950 | type = "Single " ; |
6951 | } |
6952 | len = sprintf(buf, fmt: "%s%sChannel %c, SCSI Id=%d, " , |
6953 | speed, type, ahd->channel, ahd->our_id); |
6954 | buf += len; |
6955 | |
6956 | sprintf(buf, fmt: "%s, %d SCBs" , ahd->bus_description, |
6957 | ahd->scb_data.maxhscbs); |
6958 | } |
6959 | |
6960 | static const char *channel_strings[] = { |
6961 | "Primary Low" , |
6962 | "Primary High" , |
6963 | "Secondary Low" , |
6964 | "Secondary High" |
6965 | }; |
6966 | |
6967 | static const char *termstat_strings[] = { |
6968 | "Terminated Correctly" , |
6969 | "Over Terminated" , |
6970 | "Under Terminated" , |
6971 | "Not Configured" |
6972 | }; |
6973 | |
6974 | /***************************** Timer Facilities *******************************/ |
6975 | static void |
6976 | ahd_timer_reset(struct timer_list *timer, int usec) |
6977 | { |
6978 | del_timer(timer); |
6979 | timer->expires = jiffies + (usec * HZ)/1000000; |
6980 | add_timer(timer); |
6981 | } |
6982 | |
6983 | /* |
6984 | * Start the board, ready for normal operation |
6985 | */ |
6986 | int |
6987 | ahd_init(struct ahd_softc *ahd) |
6988 | { |
6989 | uint8_t *next_vaddr; |
6990 | dma_addr_t next_baddr; |
6991 | size_t driver_data_size; |
6992 | int i; |
6993 | int error; |
6994 | u_int warn_user; |
6995 | uint8_t current_sensing; |
6996 | uint8_t fstat; |
6997 | |
6998 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
6999 | |
7000 | ahd->stack_size = ahd_probe_stack_size(ahd); |
7001 | ahd->saved_stack = kmalloc_array(n: ahd->stack_size, size: sizeof(uint16_t), |
7002 | GFP_ATOMIC); |
7003 | if (ahd->saved_stack == NULL) |
7004 | return (ENOMEM); |
7005 | |
7006 | /* |
7007 | * Verify that the compiler hasn't over-aggressively |
7008 | * padded important structures. |
7009 | */ |
7010 | if (sizeof(struct hardware_scb) != 64) |
7011 | panic(fmt: "Hardware SCB size is incorrect" ); |
7012 | |
7013 | #ifdef AHD_DEBUG |
7014 | if ((ahd_debug & AHD_DEBUG_SEQUENCER) != 0) |
7015 | ahd->flags |= AHD_SEQUENCER_DEBUG; |
7016 | #endif |
7017 | |
7018 | /* |
7019 | * Default to allowing initiator operations. |
7020 | */ |
7021 | ahd->flags |= AHD_INITIATORROLE; |
7022 | |
7023 | /* |
7024 | * Only allow target mode features if this unit has them enabled. |
7025 | */ |
7026 | if ((AHD_TMODE_ENABLE & (0x1 << ahd->unit)) == 0) |
7027 | ahd->features &= ~AHD_TARGETMODE; |
7028 | |
7029 | ahd->init_level++; |
7030 | |
7031 | /* |
7032 | * DMA tag for our command fifos and other data in system memory |
7033 | * the card's sequencer must be able to access. For initiator |
7034 | * roles, we need to allocate space for the qoutfifo. When providing |
7035 | * for the target mode role, we must additionally provide space for |
7036 | * the incoming target command fifo. |
7037 | */ |
7038 | driver_data_size = AHD_SCB_MAX * sizeof(*ahd->qoutfifo) |
7039 | + sizeof(struct hardware_scb); |
7040 | if ((ahd->features & AHD_TARGETMODE) != 0) |
7041 | driver_data_size += AHD_TMODE_CMDS * sizeof(struct target_cmd); |
7042 | if ((ahd->bugs & AHD_PKT_BITBUCKET_BUG) != 0) |
7043 | driver_data_size += PKT_OVERRUN_BUFSIZE; |
7044 | if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1, |
7045 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
7046 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
7047 | /*highaddr*/BUS_SPACE_MAXADDR, |
7048 | /*filter*/NULL, /*filterarg*/NULL, |
7049 | driver_data_size, |
7050 | /*nsegments*/1, |
7051 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
7052 | /*flags*/0, &ahd->shared_data_dmat) != 0) { |
7053 | return (ENOMEM); |
7054 | } |
7055 | |
7056 | ahd->init_level++; |
7057 | |
7058 | /* Allocation of driver data */ |
7059 | if (ahd_dmamem_alloc(ahd, ahd->shared_data_dmat, |
7060 | (void **)&ahd->shared_data_map.vaddr, |
7061 | BUS_DMA_NOWAIT, |
7062 | &ahd->shared_data_map.dmamap) != 0) { |
7063 | return (ENOMEM); |
7064 | } |
7065 | |
7066 | ahd->init_level++; |
7067 | |
7068 | /* And permanently map it in */ |
7069 | ahd_dmamap_load(ahd, ahd->shared_data_dmat, ahd->shared_data_map.dmamap, |
7070 | ahd->shared_data_map.vaddr, driver_data_size, |
7071 | ahd_dmamap_cb, &ahd->shared_data_map.physaddr, |
7072 | /*flags*/0); |
7073 | ahd->qoutfifo = (struct ahd_completion *)ahd->shared_data_map.vaddr; |
7074 | next_vaddr = (uint8_t *)&ahd->qoutfifo[AHD_QOUT_SIZE]; |
7075 | next_baddr = ahd->shared_data_map.physaddr |
7076 | + AHD_QOUT_SIZE*sizeof(struct ahd_completion); |
7077 | if ((ahd->features & AHD_TARGETMODE) != 0) { |
7078 | ahd->targetcmds = (struct target_cmd *)next_vaddr; |
7079 | next_vaddr += AHD_TMODE_CMDS * sizeof(struct target_cmd); |
7080 | next_baddr += AHD_TMODE_CMDS * sizeof(struct target_cmd); |
7081 | } |
7082 | |
7083 | if ((ahd->bugs & AHD_PKT_BITBUCKET_BUG) != 0) { |
7084 | ahd->overrun_buf = next_vaddr; |
7085 | next_vaddr += PKT_OVERRUN_BUFSIZE; |
7086 | next_baddr += PKT_OVERRUN_BUFSIZE; |
7087 | } |
7088 | |
7089 | /* |
7090 | * We need one SCB to serve as the "next SCB". Since the |
7091 | * tag identifier in this SCB will never be used, there is |
7092 | * no point in using a valid HSCB tag from an SCB pulled from |
7093 | * the standard free pool. So, we allocate this "sentinel" |
7094 | * specially from the DMA safe memory chunk used for the QOUTFIFO. |
7095 | */ |
7096 | ahd->next_queued_hscb = (struct hardware_scb *)next_vaddr; |
7097 | ahd->next_queued_hscb_map = &ahd->shared_data_map; |
7098 | ahd->next_queued_hscb->hscb_busaddr = ahd_htole32(next_baddr); |
7099 | |
7100 | ahd->init_level++; |
7101 | |
7102 | /* Allocate SCB data now that buffer_dmat is initialized */ |
7103 | if (ahd_init_scbdata(ahd) != 0) |
7104 | return (ENOMEM); |
7105 | |
7106 | if ((ahd->flags & AHD_INITIATORROLE) == 0) |
7107 | ahd->flags &= ~AHD_RESET_BUS_A; |
7108 | |
7109 | /* |
7110 | * Before committing these settings to the chip, give |
7111 | * the OSM one last chance to modify our configuration. |
7112 | */ |
7113 | ahd_platform_init(ahd); |
7114 | |
7115 | /* Bring up the chip. */ |
7116 | ahd_chip_init(ahd); |
7117 | |
7118 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
7119 | |
7120 | if ((ahd->flags & AHD_CURRENT_SENSING) == 0) |
7121 | goto init_done; |
7122 | |
7123 | /* |
7124 | * Verify termination based on current draw and |
7125 | * warn user if the bus is over/under terminated. |
7126 | */ |
7127 | error = ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, |
7128 | CURSENSE_ENB); |
7129 | if (error != 0) { |
7130 | printk("%s: current sensing timeout 1\n" , ahd_name(ahd)); |
7131 | goto init_done; |
7132 | } |
7133 | for (i = 20, fstat = FLX_FSTAT_BUSY; |
7134 | (fstat & FLX_FSTAT_BUSY) != 0 && i; i--) { |
7135 | error = ahd_read_flexport(ahd, FLXADDR_FLEXSTAT, value: &fstat); |
7136 | if (error != 0) { |
7137 | printk("%s: current sensing timeout 2\n" , |
7138 | ahd_name(ahd)); |
7139 | goto init_done; |
7140 | } |
7141 | } |
7142 | if (i == 0) { |
7143 | printk("%s: Timedout during current-sensing test\n" , |
7144 | ahd_name(ahd)); |
7145 | goto init_done; |
7146 | } |
7147 | |
7148 | /* Latch Current Sensing status. */ |
7149 | error = ahd_read_flexport(ahd, FLXADDR_CURRENT_STAT, value: ¤t_sensing); |
7150 | if (error != 0) { |
7151 | printk("%s: current sensing timeout 3\n" , ahd_name(ahd)); |
7152 | goto init_done; |
7153 | } |
7154 | |
7155 | /* Diable current sensing. */ |
7156 | ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, value: 0); |
7157 | |
7158 | #ifdef AHD_DEBUG |
7159 | if ((ahd_debug & AHD_SHOW_TERMCTL) != 0) { |
7160 | printk("%s: current_sensing == 0x%x\n" , |
7161 | ahd_name(ahd), current_sensing); |
7162 | } |
7163 | #endif |
7164 | warn_user = 0; |
7165 | for (i = 0; i < 4; i++, current_sensing >>= FLX_CSTAT_SHIFT) { |
7166 | u_int term_stat; |
7167 | |
7168 | term_stat = (current_sensing & FLX_CSTAT_MASK); |
7169 | switch (term_stat) { |
7170 | case FLX_CSTAT_OVER: |
7171 | case FLX_CSTAT_UNDER: |
7172 | warn_user++; |
7173 | fallthrough; |
7174 | case FLX_CSTAT_INVALID: |
7175 | case FLX_CSTAT_OKAY: |
7176 | if (warn_user == 0 && bootverbose == 0) |
7177 | break; |
7178 | printk("%s: %s Channel %s\n" , ahd_name(ahd), |
7179 | channel_strings[i], termstat_strings[term_stat]); |
7180 | break; |
7181 | } |
7182 | } |
7183 | if (warn_user) { |
7184 | printk("%s: WARNING. Termination is not configured correctly.\n" |
7185 | "%s: WARNING. SCSI bus operations may FAIL.\n" , |
7186 | ahd_name(ahd), ahd_name(ahd)); |
7187 | } |
7188 | init_done: |
7189 | ahd_restart(ahd); |
7190 | ahd_timer_reset(timer: &ahd->stat_timer, AHD_STAT_UPDATE_US); |
7191 | return (0); |
7192 | } |
7193 | |
7194 | /* |
7195 | * (Re)initialize chip state after a chip reset. |
7196 | */ |
7197 | static void |
7198 | ahd_chip_init(struct ahd_softc *ahd) |
7199 | { |
7200 | uint32_t busaddr; |
7201 | u_int sxfrctl1; |
7202 | u_int scsiseq_template; |
7203 | u_int wait; |
7204 | u_int i; |
7205 | u_int target; |
7206 | |
7207 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
7208 | /* |
7209 | * Take the LED out of diagnostic mode |
7210 | */ |
7211 | ahd_outb(ahd, SBLKCTL, ahd_inb(ahd, SBLKCTL) & ~(DIAGLEDEN|DIAGLEDON)); |
7212 | |
7213 | /* |
7214 | * Return HS_MAILBOX to its default value. |
7215 | */ |
7216 | ahd->hs_mailbox = 0; |
7217 | ahd_outb(ahd, HS_MAILBOX, 0); |
7218 | |
7219 | /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1. */ |
7220 | ahd_outb(ahd, IOWNID, ahd->our_id); |
7221 | ahd_outb(ahd, TOWNID, ahd->our_id); |
7222 | sxfrctl1 = (ahd->flags & AHD_TERM_ENB_A) != 0 ? STPWEN : 0; |
7223 | sxfrctl1 |= (ahd->flags & AHD_SPCHK_ENB_A) != 0 ? ENSPCHK : 0; |
7224 | if ((ahd->bugs & AHD_LONG_SETIMO_BUG) |
7225 | && (ahd->seltime != STIMESEL_MIN)) { |
7226 | /* |
7227 | * The selection timer duration is twice as long |
7228 | * as it should be. Halve it by adding "1" to |
7229 | * the user specified setting. |
7230 | */ |
7231 | sxfrctl1 |= ahd->seltime + STIMESEL_BUG_ADJ; |
7232 | } else { |
7233 | sxfrctl1 |= ahd->seltime; |
7234 | } |
7235 | |
7236 | ahd_outb(ahd, SXFRCTL0, DFON); |
7237 | ahd_outb(ahd, SXFRCTL1, sxfrctl1|ahd->seltime|ENSTIMER|ACTNEGEN); |
7238 | ahd_outb(ahd, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); |
7239 | |
7240 | /* |
7241 | * Now that termination is set, wait for up |
7242 | * to 500ms for our transceivers to settle. If |
7243 | * the adapter does not have a cable attached, |
7244 | * the transceivers may never settle, so don't |
7245 | * complain if we fail here. |
7246 | */ |
7247 | for (wait = 10000; |
7248 | (ahd_inb(ahd, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait; |
7249 | wait--) |
7250 | ahd_delay(100); |
7251 | |
7252 | /* Clear any false bus resets due to the transceivers settling */ |
7253 | ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI); |
7254 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
7255 | |
7256 | /* Initialize mode specific S/G state. */ |
7257 | for (i = 0; i < 2; i++) { |
7258 | ahd_set_modes(ahd, src: AHD_MODE_DFF0 + i, dst: AHD_MODE_DFF0 + i); |
7259 | ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR); |
7260 | ahd_outb(ahd, SG_STATE, 0); |
7261 | ahd_outb(ahd, CLRSEQINTSRC, 0xFF); |
7262 | ahd_outb(ahd, SEQIMODE, |
7263 | ENSAVEPTRS|ENCFG4DATA|ENCFG4ISTAT |
7264 | |ENCFG4TSTAT|ENCFG4ICMD|ENCFG4TCMD); |
7265 | } |
7266 | |
7267 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
7268 | ahd_outb(ahd, DSCOMMAND0, ahd_inb(ahd, DSCOMMAND0)|MPARCKEN|CACHETHEN); |
7269 | ahd_outb(ahd, DFF_THRSH, RD_DFTHRSH_75|WR_DFTHRSH_75); |
7270 | ahd_outb(ahd, SIMODE0, ENIOERR|ENOVERRUN); |
7271 | ahd_outb(ahd, SIMODE3, ENNTRAMPERR|ENOSRAMPERR); |
7272 | if ((ahd->bugs & AHD_BUSFREEREV_BUG) != 0) { |
7273 | ahd_outb(ahd, OPTIONMODE, AUTOACKEN|AUTO_MSGOUT_DE); |
7274 | } else { |
7275 | ahd_outb(ahd, OPTIONMODE, AUTOACKEN|BUSFREEREV|AUTO_MSGOUT_DE); |
7276 | } |
7277 | ahd_outb(ahd, SCSCHKN, CURRFIFODEF|WIDERESEN|SHVALIDSTDIS); |
7278 | if ((ahd->chip & AHD_BUS_MASK) == AHD_PCIX) |
7279 | /* |
7280 | * Do not issue a target abort when a split completion |
7281 | * error occurs. Let our PCIX interrupt handler deal |
7282 | * with it instead. H2A4 Razor #625 |
7283 | */ |
7284 | ahd_outb(ahd, PCIXCTL, ahd_inb(ahd, PCIXCTL) | SPLTSTADIS); |
7285 | |
7286 | if ((ahd->bugs & AHD_LQOOVERRUN_BUG) != 0) |
7287 | ahd_outb(ahd, LQOSCSCTL, LQONOCHKOVER); |
7288 | |
7289 | /* |
7290 | * Tweak IOCELL settings. |
7291 | */ |
7292 | if ((ahd->flags & AHD_HP_BOARD) != 0) { |
7293 | for (i = 0; i < NUMDSPS; i++) { |
7294 | ahd_outb(ahd, DSPSELECT, i); |
7295 | ahd_outb(ahd, WRTBIASCTL, WRTBIASCTL_HP_DEFAULT); |
7296 | } |
7297 | #ifdef AHD_DEBUG |
7298 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
7299 | printk("%s: WRTBIASCTL now 0x%x\n" , ahd_name(ahd), |
7300 | WRTBIASCTL_HP_DEFAULT); |
7301 | #endif |
7302 | } |
7303 | ahd_setup_iocell_workaround(ahd); |
7304 | |
7305 | /* |
7306 | * Enable LQI Manager interrupts. |
7307 | */ |
7308 | ahd_outb(ahd, LQIMODE1, ENLQIPHASE_LQ|ENLQIPHASE_NLQ|ENLIQABORT |
7309 | | ENLQICRCI_LQ|ENLQICRCI_NLQ|ENLQIBADLQI |
7310 | | ENLQIOVERI_LQ|ENLQIOVERI_NLQ); |
7311 | ahd_outb(ahd, LQOMODE0, ENLQOATNLQ|ENLQOATNPKT|ENLQOTCRC); |
7312 | /* |
7313 | * We choose to have the sequencer catch LQOPHCHGINPKT errors |
7314 | * manually for the command phase at the start of a packetized |
7315 | * selection case. ENLQOBUSFREE should be made redundant by |
7316 | * the BUSFREE interrupt, but it seems that some LQOBUSFREE |
7317 | * events fail to assert the BUSFREE interrupt so we must |
7318 | * also enable LQOBUSFREE interrupts. |
7319 | */ |
7320 | ahd_outb(ahd, LQOMODE1, ENLQOBUSFREE); |
7321 | |
7322 | /* |
7323 | * Setup sequencer interrupt handlers. |
7324 | */ |
7325 | ahd_outw(ahd, INTVEC1_ADDR, ahd_resolve_seqaddr(ahd, LABEL_seq_isr)); |
7326 | ahd_outw(ahd, INTVEC2_ADDR, ahd_resolve_seqaddr(ahd, LABEL_timer_isr)); |
7327 | |
7328 | /* |
7329 | * Setup SCB Offset registers. |
7330 | */ |
7331 | if ((ahd->bugs & AHD_PKT_LUN_BUG) != 0) { |
7332 | ahd_outb(ahd, LUNPTR, offsetof(struct hardware_scb, |
7333 | pkt_long_lun)); |
7334 | } else { |
7335 | ahd_outb(ahd, LUNPTR, offsetof(struct hardware_scb, lun)); |
7336 | } |
7337 | ahd_outb(ahd, CMDLENPTR, offsetof(struct hardware_scb, cdb_len)); |
7338 | ahd_outb(ahd, ATTRPTR, offsetof(struct hardware_scb, task_attribute)); |
7339 | ahd_outb(ahd, FLAGPTR, offsetof(struct hardware_scb, task_management)); |
7340 | ahd_outb(ahd, CMDPTR, offsetof(struct hardware_scb, |
7341 | shared_data.idata.cdb)); |
7342 | ahd_outb(ahd, QNEXTPTR, |
7343 | offsetof(struct hardware_scb, next_hscb_busaddr)); |
7344 | ahd_outb(ahd, ABRTBITPTR, MK_MESSAGE_BIT_OFFSET); |
7345 | ahd_outb(ahd, ABRTBYTEPTR, offsetof(struct hardware_scb, control)); |
7346 | if ((ahd->bugs & AHD_PKT_LUN_BUG) != 0) { |
7347 | ahd_outb(ahd, LUNLEN, |
7348 | sizeof(ahd->next_queued_hscb->pkt_long_lun) - 1); |
7349 | } else { |
7350 | ahd_outb(ahd, LUNLEN, LUNLEN_SINGLE_LEVEL_LUN); |
7351 | } |
7352 | ahd_outb(ahd, CDBLIMIT, SCB_CDB_LEN_PTR - 1); |
7353 | ahd_outb(ahd, MAXCMD, 0xFF); |
7354 | ahd_outb(ahd, SCBAUTOPTR, |
7355 | AUSCBPTR_EN | offsetof(struct hardware_scb, tag)); |
7356 | |
7357 | /* We haven't been enabled for target mode yet. */ |
7358 | ahd_outb(ahd, MULTARGID, 0); |
7359 | ahd_outb(ahd, MULTARGID + 1, 0); |
7360 | |
7361 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
7362 | /* Initialize the negotiation table. */ |
7363 | if ((ahd->features & AHD_NEW_IOCELL_OPTS) == 0) { |
7364 | /* |
7365 | * Clear the spare bytes in the neg table to avoid |
7366 | * spurious parity errors. |
7367 | */ |
7368 | for (target = 0; target < AHD_NUM_TARGETS; target++) { |
7369 | ahd_outb(ahd, NEGOADDR, target); |
7370 | ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_PER_DEV0); |
7371 | for (i = 0; i < AHD_NUM_PER_DEV_ANNEXCOLS; i++) |
7372 | ahd_outb(ahd, ANNEXDAT, 0); |
7373 | } |
7374 | } |
7375 | for (target = 0; target < AHD_NUM_TARGETS; target++) { |
7376 | struct ahd_devinfo devinfo; |
7377 | struct ahd_initiator_tinfo *tinfo; |
7378 | struct ahd_tmode_tstate *tstate; |
7379 | |
7380 | tinfo = ahd_fetch_transinfo(ahd, channel: 'A', our_id: ahd->our_id, |
7381 | remote_id: target, tstate: &tstate); |
7382 | ahd_compile_devinfo(devinfo: &devinfo, our_id: ahd->our_id, |
7383 | target, CAM_LUN_WILDCARD, |
7384 | channel: 'A', role: ROLE_INITIATOR); |
7385 | ahd_update_neg_table(ahd, devinfo: &devinfo, tinfo: &tinfo->curr); |
7386 | } |
7387 | |
7388 | ahd_outb(ahd, CLRSINT3, NTRAMPERR|OSRAMPERR); |
7389 | ahd_outb(ahd, CLRINT, CLRSCSIINT); |
7390 | |
7391 | #ifdef NEEDS_MORE_TESTING |
7392 | /* |
7393 | * Always enable abort on incoming L_Qs if this feature is |
7394 | * supported. We use this to catch invalid SCB references. |
7395 | */ |
7396 | if ((ahd->bugs & AHD_ABORT_LQI_BUG) == 0) |
7397 | ahd_outb(ahd, LQCTL1, ABORTPENDING); |
7398 | else |
7399 | #endif |
7400 | ahd_outb(ahd, LQCTL1, 0); |
7401 | |
7402 | /* All of our queues are empty */ |
7403 | ahd->qoutfifonext = 0; |
7404 | ahd->qoutfifonext_valid_tag = QOUTFIFO_ENTRY_VALID; |
7405 | ahd_outb(ahd, QOUTFIFO_ENTRY_VALID_TAG, QOUTFIFO_ENTRY_VALID); |
7406 | for (i = 0; i < AHD_QOUT_SIZE; i++) |
7407 | ahd->qoutfifo[i].valid_tag = 0; |
7408 | ahd_sync_qoutfifo(ahd, BUS_DMASYNC_PREREAD); |
7409 | |
7410 | ahd->qinfifonext = 0; |
7411 | for (i = 0; i < AHD_QIN_SIZE; i++) |
7412 | ahd->qinfifo[i] = SCB_LIST_NULL; |
7413 | |
7414 | if ((ahd->features & AHD_TARGETMODE) != 0) { |
7415 | /* All target command blocks start out invalid. */ |
7416 | for (i = 0; i < AHD_TMODE_CMDS; i++) |
7417 | ahd->targetcmds[i].cmd_valid = 0; |
7418 | ahd_sync_tqinfifo(ahd, BUS_DMASYNC_PREREAD); |
7419 | ahd->tqinfifonext = 1; |
7420 | ahd_outb(ahd, KERNEL_TQINPOS, ahd->tqinfifonext - 1); |
7421 | ahd_outb(ahd, TQINPOS, ahd->tqinfifonext); |
7422 | } |
7423 | |
7424 | /* Initialize Scratch Ram. */ |
7425 | ahd_outb(ahd, SEQ_FLAGS, 0); |
7426 | ahd_outb(ahd, SEQ_FLAGS2, 0); |
7427 | |
7428 | /* We don't have any waiting selections */ |
7429 | ahd_outw(ahd, WAITING_TID_HEAD, SCB_LIST_NULL); |
7430 | ahd_outw(ahd, WAITING_TID_TAIL, SCB_LIST_NULL); |
7431 | ahd_outw(ahd, MK_MESSAGE_SCB, SCB_LIST_NULL); |
7432 | ahd_outw(ahd, MK_MESSAGE_SCSIID, 0xFF); |
7433 | for (i = 0; i < AHD_NUM_TARGETS; i++) |
7434 | ahd_outw(ahd, WAITING_SCB_TAILS + (2 * i), SCB_LIST_NULL); |
7435 | |
7436 | /* |
7437 | * Nobody is waiting to be DMAed into the QOUTFIFO. |
7438 | */ |
7439 | ahd_outw(ahd, COMPLETE_SCB_HEAD, SCB_LIST_NULL); |
7440 | ahd_outw(ahd, COMPLETE_SCB_DMAINPROG_HEAD, SCB_LIST_NULL); |
7441 | ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD, SCB_LIST_NULL); |
7442 | ahd_outw(ahd, COMPLETE_DMA_SCB_TAIL, SCB_LIST_NULL); |
7443 | ahd_outw(ahd, COMPLETE_ON_QFREEZE_HEAD, SCB_LIST_NULL); |
7444 | |
7445 | /* |
7446 | * The Freeze Count is 0. |
7447 | */ |
7448 | ahd->qfreeze_cnt = 0; |
7449 | ahd_outw(ahd, QFREEZE_COUNT, 0); |
7450 | ahd_outw(ahd, KERNEL_QFREEZE_COUNT, 0); |
7451 | |
7452 | /* |
7453 | * Tell the sequencer where it can find our arrays in memory. |
7454 | */ |
7455 | busaddr = ahd->shared_data_map.physaddr; |
7456 | ahd_outl(ahd, SHARED_DATA_ADDR, busaddr); |
7457 | ahd_outl(ahd, QOUTFIFO_NEXT_ADDR, busaddr); |
7458 | |
7459 | /* |
7460 | * Setup the allowed SCSI Sequences based on operational mode. |
7461 | * If we are a target, we'll enable select in operations once |
7462 | * we've had a lun enabled. |
7463 | */ |
7464 | scsiseq_template = ENAUTOATNP; |
7465 | if ((ahd->flags & AHD_INITIATORROLE) != 0) |
7466 | scsiseq_template |= ENRSELI; |
7467 | ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq_template); |
7468 | |
7469 | /* There are no busy SCBs yet. */ |
7470 | for (target = 0; target < AHD_NUM_TARGETS; target++) { |
7471 | int lun; |
7472 | |
7473 | for (lun = 0; lun < AHD_NUM_LUNS_NONPKT; lun++) |
7474 | ahd_unbusy_tcl(ahd, BUILD_TCL_RAW(target, 'A', lun)); |
7475 | } |
7476 | |
7477 | /* |
7478 | * Initialize the group code to command length table. |
7479 | * Vendor Unique codes are set to 0 so we only capture |
7480 | * the first byte of the cdb. These can be overridden |
7481 | * when target mode is enabled. |
7482 | */ |
7483 | ahd_outb(ahd, CMDSIZE_TABLE, 5); |
7484 | ahd_outb(ahd, CMDSIZE_TABLE + 1, 9); |
7485 | ahd_outb(ahd, CMDSIZE_TABLE + 2, 9); |
7486 | ahd_outb(ahd, CMDSIZE_TABLE + 3, 0); |
7487 | ahd_outb(ahd, CMDSIZE_TABLE + 4, 15); |
7488 | ahd_outb(ahd, CMDSIZE_TABLE + 5, 11); |
7489 | ahd_outb(ahd, CMDSIZE_TABLE + 6, 0); |
7490 | ahd_outb(ahd, CMDSIZE_TABLE + 7, 0); |
7491 | |
7492 | /* Tell the sequencer of our initial queue positions */ |
7493 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
7494 | ahd_outb(ahd, QOFF_CTLSTA, SCB_QSIZE_512); |
7495 | ahd->qinfifonext = 0; |
7496 | ahd_set_hnscb_qoff(ahd, value: ahd->qinfifonext); |
7497 | ahd_set_hescb_qoff(ahd, value: 0); |
7498 | ahd_set_snscb_qoff(ahd, value: 0); |
7499 | ahd_set_sescb_qoff(ahd, value: 0); |
7500 | ahd_set_sdscb_qoff(ahd, value: 0); |
7501 | |
7502 | /* |
7503 | * Tell the sequencer which SCB will be the next one it receives. |
7504 | */ |
7505 | busaddr = ahd_le32toh(ahd->next_queued_hscb->hscb_busaddr); |
7506 | ahd_outl(ahd, NEXT_QUEUED_SCB_ADDR, busaddr); |
7507 | |
7508 | /* |
7509 | * Default to coalescing disabled. |
7510 | */ |
7511 | ahd_outw(ahd, INT_COALESCING_CMDCOUNT, 0); |
7512 | ahd_outw(ahd, CMDS_PENDING, 0); |
7513 | ahd_update_coalescing_values(ahd, timer: ahd->int_coalescing_timer, |
7514 | maxcmds: ahd->int_coalescing_maxcmds, |
7515 | mincmds: ahd->int_coalescing_mincmds); |
7516 | ahd_enable_coalescing(ahd, FALSE); |
7517 | |
7518 | ahd_loadseq(ahd); |
7519 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
7520 | |
7521 | if (ahd->features & AHD_AIC79XXB_SLOWCRC) { |
7522 | u_int negodat3 = ahd_inb(ahd, NEGCONOPTS); |
7523 | |
7524 | negodat3 |= ENSLOWCRC; |
7525 | ahd_outb(ahd, NEGCONOPTS, negodat3); |
7526 | negodat3 = ahd_inb(ahd, NEGCONOPTS); |
7527 | if (!(negodat3 & ENSLOWCRC)) |
7528 | printk("aic79xx: failed to set the SLOWCRC bit\n" ); |
7529 | else |
7530 | printk("aic79xx: SLOWCRC bit set\n" ); |
7531 | } |
7532 | } |
7533 | |
7534 | /* |
7535 | * Setup default device and controller settings. |
7536 | * This should only be called if our probe has |
7537 | * determined that no configuration data is available. |
7538 | */ |
7539 | int |
7540 | ahd_default_config(struct ahd_softc *ahd) |
7541 | { |
7542 | int targ; |
7543 | |
7544 | ahd->our_id = 7; |
7545 | |
7546 | /* |
7547 | * Allocate a tstate to house information for our |
7548 | * initiator presence on the bus as well as the user |
7549 | * data for any target mode initiator. |
7550 | */ |
7551 | if (ahd_alloc_tstate(ahd, scsi_id: ahd->our_id, channel: 'A') == NULL) { |
7552 | printk("%s: unable to allocate ahd_tmode_tstate. " |
7553 | "Failing attach\n" , ahd_name(ahd)); |
7554 | return (ENOMEM); |
7555 | } |
7556 | |
7557 | for (targ = 0; targ < AHD_NUM_TARGETS; targ++) { |
7558 | struct ahd_devinfo devinfo; |
7559 | struct ahd_initiator_tinfo *tinfo; |
7560 | struct ahd_tmode_tstate *tstate; |
7561 | uint16_t target_mask; |
7562 | |
7563 | tinfo = ahd_fetch_transinfo(ahd, channel: 'A', our_id: ahd->our_id, |
7564 | remote_id: targ, tstate: &tstate); |
7565 | /* |
7566 | * We support SPC2 and SPI4. |
7567 | */ |
7568 | tinfo->user.protocol_version = 4; |
7569 | tinfo->user.transport_version = 4; |
7570 | |
7571 | target_mask = 0x01 << targ; |
7572 | ahd->user_discenable |= target_mask; |
7573 | tstate->discenable |= target_mask; |
7574 | ahd->user_tagenable |= target_mask; |
7575 | #ifdef AHD_FORCE_160 |
7576 | tinfo->user.period = AHD_SYNCRATE_DT; |
7577 | #else |
7578 | tinfo->user.period = AHD_SYNCRATE_160; |
7579 | #endif |
7580 | tinfo->user.offset = MAX_OFFSET; |
7581 | tinfo->user.ppr_options = MSG_EXT_PPR_RD_STRM |
7582 | | MSG_EXT_PPR_WR_FLOW |
7583 | | MSG_EXT_PPR_HOLD_MCS |
7584 | | MSG_EXT_PPR_IU_REQ |
7585 | | MSG_EXT_PPR_QAS_REQ |
7586 | | MSG_EXT_PPR_DT_REQ; |
7587 | if ((ahd->features & AHD_RTI) != 0) |
7588 | tinfo->user.ppr_options |= MSG_EXT_PPR_RTI; |
7589 | |
7590 | tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; |
7591 | |
7592 | /* |
7593 | * Start out Async/Narrow/Untagged and with |
7594 | * conservative protocol support. |
7595 | */ |
7596 | tinfo->goal.protocol_version = 2; |
7597 | tinfo->goal.transport_version = 2; |
7598 | tinfo->curr.protocol_version = 2; |
7599 | tinfo->curr.transport_version = 2; |
7600 | ahd_compile_devinfo(devinfo: &devinfo, our_id: ahd->our_id, |
7601 | target: targ, CAM_LUN_WILDCARD, |
7602 | channel: 'A', role: ROLE_INITIATOR); |
7603 | tstate->tagenable &= ~target_mask; |
7604 | ahd_set_width(ahd, devinfo: &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
7605 | AHD_TRANS_CUR|AHD_TRANS_GOAL, /*paused*/TRUE); |
7606 | ahd_set_syncrate(ahd, devinfo: &devinfo, /*period*/0, /*offset*/0, |
7607 | /*ppr_options*/0, AHD_TRANS_CUR|AHD_TRANS_GOAL, |
7608 | /*paused*/TRUE); |
7609 | } |
7610 | return (0); |
7611 | } |
7612 | |
7613 | /* |
7614 | * Parse device configuration information. |
7615 | */ |
7616 | int |
7617 | ahd_parse_cfgdata(struct ahd_softc *ahd, struct seeprom_config *sc) |
7618 | { |
7619 | int targ; |
7620 | int max_targ; |
7621 | |
7622 | max_targ = sc->max_targets & CFMAXTARG; |
7623 | ahd->our_id = sc->brtime_id & CFSCSIID; |
7624 | |
7625 | /* |
7626 | * Allocate a tstate to house information for our |
7627 | * initiator presence on the bus as well as the user |
7628 | * data for any target mode initiator. |
7629 | */ |
7630 | if (ahd_alloc_tstate(ahd, scsi_id: ahd->our_id, channel: 'A') == NULL) { |
7631 | printk("%s: unable to allocate ahd_tmode_tstate. " |
7632 | "Failing attach\n" , ahd_name(ahd)); |
7633 | return (ENOMEM); |
7634 | } |
7635 | |
7636 | for (targ = 0; targ < max_targ; targ++) { |
7637 | struct ahd_devinfo devinfo; |
7638 | struct ahd_initiator_tinfo *tinfo; |
7639 | struct ahd_transinfo *user_tinfo; |
7640 | struct ahd_tmode_tstate *tstate; |
7641 | uint16_t target_mask; |
7642 | |
7643 | tinfo = ahd_fetch_transinfo(ahd, channel: 'A', our_id: ahd->our_id, |
7644 | remote_id: targ, tstate: &tstate); |
7645 | user_tinfo = &tinfo->user; |
7646 | |
7647 | /* |
7648 | * We support SPC2 and SPI4. |
7649 | */ |
7650 | tinfo->user.protocol_version = 4; |
7651 | tinfo->user.transport_version = 4; |
7652 | |
7653 | target_mask = 0x01 << targ; |
7654 | ahd->user_discenable &= ~target_mask; |
7655 | tstate->discenable &= ~target_mask; |
7656 | ahd->user_tagenable &= ~target_mask; |
7657 | if (sc->device_flags[targ] & CFDISC) { |
7658 | tstate->discenable |= target_mask; |
7659 | ahd->user_discenable |= target_mask; |
7660 | ahd->user_tagenable |= target_mask; |
7661 | } else { |
7662 | /* |
7663 | * Cannot be packetized without disconnection. |
7664 | */ |
7665 | sc->device_flags[targ] &= ~CFPACKETIZED; |
7666 | } |
7667 | |
7668 | user_tinfo->ppr_options = 0; |
7669 | user_tinfo->period = (sc->device_flags[targ] & CFXFER); |
7670 | if (user_tinfo->period < CFXFER_ASYNC) { |
7671 | if (user_tinfo->period <= AHD_PERIOD_10MHz) |
7672 | user_tinfo->ppr_options |= MSG_EXT_PPR_DT_REQ; |
7673 | user_tinfo->offset = MAX_OFFSET; |
7674 | } else { |
7675 | user_tinfo->offset = 0; |
7676 | user_tinfo->period = AHD_ASYNC_XFER_PERIOD; |
7677 | } |
7678 | #ifdef AHD_FORCE_160 |
7679 | if (user_tinfo->period <= AHD_SYNCRATE_160) |
7680 | user_tinfo->period = AHD_SYNCRATE_DT; |
7681 | #endif |
7682 | |
7683 | if ((sc->device_flags[targ] & CFPACKETIZED) != 0) { |
7684 | user_tinfo->ppr_options |= MSG_EXT_PPR_RD_STRM |
7685 | | MSG_EXT_PPR_WR_FLOW |
7686 | | MSG_EXT_PPR_HOLD_MCS |
7687 | | MSG_EXT_PPR_IU_REQ; |
7688 | if ((ahd->features & AHD_RTI) != 0) |
7689 | user_tinfo->ppr_options |= MSG_EXT_PPR_RTI; |
7690 | } |
7691 | |
7692 | if ((sc->device_flags[targ] & CFQAS) != 0) |
7693 | user_tinfo->ppr_options |= MSG_EXT_PPR_QAS_REQ; |
7694 | |
7695 | if ((sc->device_flags[targ] & CFWIDEB) != 0) |
7696 | user_tinfo->width = MSG_EXT_WDTR_BUS_16_BIT; |
7697 | else |
7698 | user_tinfo->width = MSG_EXT_WDTR_BUS_8_BIT; |
7699 | #ifdef AHD_DEBUG |
7700 | if ((ahd_debug & AHD_SHOW_MISC) != 0) |
7701 | printk("(%d): %x:%x:%x:%x\n" , targ, user_tinfo->width, |
7702 | user_tinfo->period, user_tinfo->offset, |
7703 | user_tinfo->ppr_options); |
7704 | #endif |
7705 | /* |
7706 | * Start out Async/Narrow/Untagged and with |
7707 | * conservative protocol support. |
7708 | */ |
7709 | tstate->tagenable &= ~target_mask; |
7710 | tinfo->goal.protocol_version = 2; |
7711 | tinfo->goal.transport_version = 2; |
7712 | tinfo->curr.protocol_version = 2; |
7713 | tinfo->curr.transport_version = 2; |
7714 | ahd_compile_devinfo(devinfo: &devinfo, our_id: ahd->our_id, |
7715 | target: targ, CAM_LUN_WILDCARD, |
7716 | channel: 'A', role: ROLE_INITIATOR); |
7717 | ahd_set_width(ahd, devinfo: &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
7718 | AHD_TRANS_CUR|AHD_TRANS_GOAL, /*paused*/TRUE); |
7719 | ahd_set_syncrate(ahd, devinfo: &devinfo, /*period*/0, /*offset*/0, |
7720 | /*ppr_options*/0, AHD_TRANS_CUR|AHD_TRANS_GOAL, |
7721 | /*paused*/TRUE); |
7722 | } |
7723 | |
7724 | ahd->flags &= ~AHD_SPCHK_ENB_A; |
7725 | if (sc->bios_control & CFSPARITY) |
7726 | ahd->flags |= AHD_SPCHK_ENB_A; |
7727 | |
7728 | ahd->flags &= ~AHD_RESET_BUS_A; |
7729 | if (sc->bios_control & CFRESETB) |
7730 | ahd->flags |= AHD_RESET_BUS_A; |
7731 | |
7732 | ahd->flags &= ~AHD_EXTENDED_TRANS_A; |
7733 | if (sc->bios_control & CFEXTEND) |
7734 | ahd->flags |= AHD_EXTENDED_TRANS_A; |
7735 | |
7736 | ahd->flags &= ~AHD_BIOS_ENABLED; |
7737 | if ((sc->bios_control & CFBIOSSTATE) == CFBS_ENABLED) |
7738 | ahd->flags |= AHD_BIOS_ENABLED; |
7739 | |
7740 | ahd->flags &= ~AHD_STPWLEVEL_A; |
7741 | if ((sc->adapter_control & CFSTPWLEVEL) != 0) |
7742 | ahd->flags |= AHD_STPWLEVEL_A; |
7743 | |
7744 | return (0); |
7745 | } |
7746 | |
7747 | /* |
7748 | * Parse device configuration information. |
7749 | */ |
7750 | int |
7751 | ahd_parse_vpddata(struct ahd_softc *ahd, struct vpd_config *vpd) |
7752 | { |
7753 | int error; |
7754 | |
7755 | error = ahd_verify_vpd_cksum(vpd); |
7756 | if (error == 0) |
7757 | return (EINVAL); |
7758 | if ((vpd->bios_flags & VPDBOOTHOST) != 0) |
7759 | ahd->flags |= AHD_BOOT_CHANNEL; |
7760 | return (0); |
7761 | } |
7762 | |
7763 | void |
7764 | ahd_intr_enable(struct ahd_softc *ahd, int enable) |
7765 | { |
7766 | u_int hcntrl; |
7767 | |
7768 | hcntrl = ahd_inb(ahd, HCNTRL); |
7769 | hcntrl &= ~INTEN; |
7770 | ahd->pause &= ~INTEN; |
7771 | ahd->unpause &= ~INTEN; |
7772 | if (enable) { |
7773 | hcntrl |= INTEN; |
7774 | ahd->pause |= INTEN; |
7775 | ahd->unpause |= INTEN; |
7776 | } |
7777 | ahd_outb(ahd, HCNTRL, hcntrl); |
7778 | } |
7779 | |
7780 | static void |
7781 | ahd_update_coalescing_values(struct ahd_softc *ahd, u_int timer, u_int maxcmds, |
7782 | u_int mincmds) |
7783 | { |
7784 | if (timer > AHD_TIMER_MAX_US) |
7785 | timer = AHD_TIMER_MAX_US; |
7786 | ahd->int_coalescing_timer = timer; |
7787 | |
7788 | if (maxcmds > AHD_INT_COALESCING_MAXCMDS_MAX) |
7789 | maxcmds = AHD_INT_COALESCING_MAXCMDS_MAX; |
7790 | if (mincmds > AHD_INT_COALESCING_MINCMDS_MAX) |
7791 | mincmds = AHD_INT_COALESCING_MINCMDS_MAX; |
7792 | ahd->int_coalescing_maxcmds = maxcmds; |
7793 | ahd_outw(ahd, INT_COALESCING_TIMER, timer / AHD_TIMER_US_PER_TICK); |
7794 | ahd_outb(ahd, INT_COALESCING_MAXCMDS, -maxcmds); |
7795 | ahd_outb(ahd, INT_COALESCING_MINCMDS, -mincmds); |
7796 | } |
7797 | |
7798 | static void |
7799 | ahd_enable_coalescing(struct ahd_softc *ahd, int enable) |
7800 | { |
7801 | |
7802 | ahd->hs_mailbox &= ~ENINT_COALESCE; |
7803 | if (enable) |
7804 | ahd->hs_mailbox |= ENINT_COALESCE; |
7805 | ahd_outb(ahd, HS_MAILBOX, ahd->hs_mailbox); |
7806 | ahd_flush_device_writes(ahd); |
7807 | ahd_run_qoutfifo(ahd); |
7808 | } |
7809 | |
7810 | /* |
7811 | * Ensure that the card is paused in a location |
7812 | * outside of all critical sections and that all |
7813 | * pending work is completed prior to returning. |
7814 | * This routine should only be called from outside |
7815 | * an interrupt context. |
7816 | */ |
7817 | void |
7818 | ahd_pause_and_flushwork(struct ahd_softc *ahd) |
7819 | { |
7820 | u_int intstat; |
7821 | u_int maxloops; |
7822 | |
7823 | maxloops = 1000; |
7824 | ahd->flags |= AHD_ALL_INTERRUPTS; |
7825 | ahd_pause(ahd); |
7826 | /* |
7827 | * Freeze the outgoing selections. We do this only |
7828 | * until we are safely paused without further selections |
7829 | * pending. |
7830 | */ |
7831 | ahd->qfreeze_cnt--; |
7832 | ahd_outw(ahd, KERNEL_QFREEZE_COUNT, ahd->qfreeze_cnt); |
7833 | ahd_outb(ahd, SEQ_FLAGS2, ahd_inb(ahd, SEQ_FLAGS2) | SELECTOUT_QFROZEN); |
7834 | do { |
7835 | |
7836 | ahd_unpause(ahd); |
7837 | /* |
7838 | * Give the sequencer some time to service |
7839 | * any active selections. |
7840 | */ |
7841 | ahd_delay(500); |
7842 | |
7843 | ahd_intr(ahd); |
7844 | ahd_pause(ahd); |
7845 | intstat = ahd_inb(ahd, INTSTAT); |
7846 | if ((intstat & INT_PEND) == 0) { |
7847 | ahd_clear_critical_section(ahd); |
7848 | intstat = ahd_inb(ahd, INTSTAT); |
7849 | } |
7850 | } while (--maxloops |
7851 | && (intstat != 0xFF || (ahd->features & AHD_REMOVABLE) == 0) |
7852 | && ((intstat & INT_PEND) != 0 |
7853 | || (ahd_inb(ahd, SCSISEQ0) & ENSELO) != 0 |
7854 | || (ahd_inb(ahd, SSTAT0) & (SELDO|SELINGO)) != 0)); |
7855 | |
7856 | if (maxloops == 0) { |
7857 | printk("Infinite interrupt loop, INTSTAT = %x" , |
7858 | ahd_inb(ahd, INTSTAT)); |
7859 | } |
7860 | ahd->qfreeze_cnt++; |
7861 | ahd_outw(ahd, KERNEL_QFREEZE_COUNT, ahd->qfreeze_cnt); |
7862 | |
7863 | ahd_flush_qoutfifo(ahd); |
7864 | |
7865 | ahd->flags &= ~AHD_ALL_INTERRUPTS; |
7866 | } |
7867 | |
7868 | int __maybe_unused |
7869 | ahd_suspend(struct ahd_softc *ahd) |
7870 | { |
7871 | ahd_pause_and_flushwork(ahd); |
7872 | |
7873 | if (LIST_FIRST(&ahd->pending_scbs) != NULL) { |
7874 | ahd_unpause(ahd); |
7875 | return (EBUSY); |
7876 | } |
7877 | ahd_shutdown(arg: ahd); |
7878 | return (0); |
7879 | } |
7880 | |
7881 | void __maybe_unused |
7882 | ahd_resume(struct ahd_softc *ahd) |
7883 | { |
7884 | ahd_reset(ahd, /*reinit*/TRUE); |
7885 | ahd_intr_enable(ahd, TRUE); |
7886 | ahd_restart(ahd); |
7887 | } |
7888 | |
7889 | /************************** Busy Target Table *********************************/ |
7890 | /* |
7891 | * Set SCBPTR to the SCB that contains the busy |
7892 | * table entry for TCL. Return the offset into |
7893 | * the SCB that contains the entry for TCL. |
7894 | * saved_scbid is dereferenced and set to the |
7895 | * scbid that should be restored once manipualtion |
7896 | * of the TCL entry is complete. |
7897 | */ |
7898 | static inline u_int |
7899 | ahd_index_busy_tcl(struct ahd_softc *ahd, u_int *saved_scbid, u_int tcl) |
7900 | { |
7901 | /* |
7902 | * Index to the SCB that contains the busy entry. |
7903 | */ |
7904 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
7905 | *saved_scbid = ahd_get_scbptr(ahd); |
7906 | ahd_set_scbptr(ahd, TCL_LUN(tcl) |
7907 | | ((TCL_TARGET_OFFSET(tcl) & 0xC) << 4)); |
7908 | |
7909 | /* |
7910 | * And now calculate the SCB offset to the entry. |
7911 | * Each entry is 2 bytes wide, hence the |
7912 | * multiplication by 2. |
7913 | */ |
7914 | return (((TCL_TARGET_OFFSET(tcl) & 0x3) << 1) + SCB_DISCONNECTED_LISTS); |
7915 | } |
7916 | |
7917 | /* |
7918 | * Return the untagged transaction id for a given target/channel lun. |
7919 | */ |
7920 | static u_int |
7921 | ahd_find_busy_tcl(struct ahd_softc *ahd, u_int tcl) |
7922 | { |
7923 | u_int scbid; |
7924 | u_int scb_offset; |
7925 | u_int saved_scbptr; |
7926 | |
7927 | scb_offset = ahd_index_busy_tcl(ahd, saved_scbid: &saved_scbptr, tcl); |
7928 | scbid = ahd_inw_scbram(ahd, offset: scb_offset); |
7929 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
7930 | return (scbid); |
7931 | } |
7932 | |
7933 | static void |
7934 | ahd_busy_tcl(struct ahd_softc *ahd, u_int tcl, u_int scbid) |
7935 | { |
7936 | u_int scb_offset; |
7937 | u_int saved_scbptr; |
7938 | |
7939 | scb_offset = ahd_index_busy_tcl(ahd, saved_scbid: &saved_scbptr, tcl); |
7940 | ahd_outw(ahd, port: scb_offset, value: scbid); |
7941 | ahd_set_scbptr(ahd, scbptr: saved_scbptr); |
7942 | } |
7943 | |
7944 | /************************** SCB and SCB queue management **********************/ |
7945 | static int |
7946 | ahd_match_scb(struct ahd_softc *ahd, struct scb *scb, int target, |
7947 | char channel, int lun, u_int tag, role_t role) |
7948 | { |
7949 | int targ = SCB_GET_TARGET(ahd, scb); |
7950 | char chan = SCB_GET_CHANNEL(ahd, scb); |
7951 | int slun = SCB_GET_LUN(scb); |
7952 | int match; |
7953 | |
7954 | match = ((chan == channel) || (channel == ALL_CHANNELS)); |
7955 | if (match != 0) |
7956 | match = ((targ == target) || (target == CAM_TARGET_WILDCARD)); |
7957 | if (match != 0) |
7958 | match = ((lun == slun) || (lun == CAM_LUN_WILDCARD)); |
7959 | if (match != 0) { |
7960 | #ifdef AHD_TARGET_MODE |
7961 | int group; |
7962 | |
7963 | group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code); |
7964 | if (role == ROLE_INITIATOR) { |
7965 | match = (group != XPT_FC_GROUP_TMODE) |
7966 | && ((tag == SCB_GET_TAG(scb)) |
7967 | || (tag == SCB_LIST_NULL)); |
7968 | } else if (role == ROLE_TARGET) { |
7969 | match = (group == XPT_FC_GROUP_TMODE) |
7970 | && ((tag == scb->io_ctx->csio.tag_id) |
7971 | || (tag == SCB_LIST_NULL)); |
7972 | } |
7973 | #else /* !AHD_TARGET_MODE */ |
7974 | match = ((tag == SCB_GET_TAG(scb)) || (tag == SCB_LIST_NULL)); |
7975 | #endif /* AHD_TARGET_MODE */ |
7976 | } |
7977 | |
7978 | return match; |
7979 | } |
7980 | |
7981 | static void |
7982 | ahd_freeze_devq(struct ahd_softc *ahd, struct scb *scb) |
7983 | { |
7984 | int target; |
7985 | char channel; |
7986 | int lun; |
7987 | |
7988 | target = SCB_GET_TARGET(ahd, scb); |
7989 | lun = SCB_GET_LUN(scb); |
7990 | channel = SCB_GET_CHANNEL(ahd, scb); |
7991 | |
7992 | ahd_search_qinfifo(ahd, target, channel, lun, |
7993 | /*tag*/SCB_LIST_NULL, role: ROLE_UNKNOWN, |
7994 | status: CAM_REQUEUE_REQ, action: SEARCH_COMPLETE); |
7995 | |
7996 | ahd_platform_freeze_devq(ahd, scb); |
7997 | } |
7998 | |
7999 | void |
8000 | ahd_qinfifo_requeue_tail(struct ahd_softc *ahd, struct scb *scb) |
8001 | { |
8002 | struct scb *prev_scb; |
8003 | ahd_mode_state saved_modes; |
8004 | |
8005 | saved_modes = ahd_save_modes(ahd); |
8006 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
8007 | prev_scb = NULL; |
8008 | if (ahd_qinfifo_count(ahd) != 0) { |
8009 | u_int prev_tag; |
8010 | u_int prev_pos; |
8011 | |
8012 | prev_pos = AHD_QIN_WRAP(ahd->qinfifonext - 1); |
8013 | prev_tag = ahd->qinfifo[prev_pos]; |
8014 | prev_scb = ahd_lookup_scb(ahd, tag: prev_tag); |
8015 | } |
8016 | ahd_qinfifo_requeue(ahd, prev_scb, scb); |
8017 | ahd_set_hnscb_qoff(ahd, value: ahd->qinfifonext); |
8018 | ahd_restore_modes(ahd, state: saved_modes); |
8019 | } |
8020 | |
8021 | static void |
8022 | ahd_qinfifo_requeue(struct ahd_softc *ahd, struct scb *prev_scb, |
8023 | struct scb *scb) |
8024 | { |
8025 | if (prev_scb == NULL) { |
8026 | uint32_t busaddr; |
8027 | |
8028 | busaddr = ahd_le32toh(scb->hscb->hscb_busaddr); |
8029 | ahd_outl(ahd, NEXT_QUEUED_SCB_ADDR, busaddr); |
8030 | } else { |
8031 | prev_scb->hscb->next_hscb_busaddr = scb->hscb->hscb_busaddr; |
8032 | ahd_sync_scb(ahd, scb: prev_scb, |
8033 | BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
8034 | } |
8035 | ahd->qinfifo[AHD_QIN_WRAP(ahd->qinfifonext)] = SCB_GET_TAG(scb); |
8036 | ahd->qinfifonext++; |
8037 | scb->hscb->next_hscb_busaddr = ahd->next_queued_hscb->hscb_busaddr; |
8038 | ahd_sync_scb(ahd, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
8039 | } |
8040 | |
8041 | static int |
8042 | ahd_qinfifo_count(struct ahd_softc *ahd) |
8043 | { |
8044 | u_int qinpos; |
8045 | u_int wrap_qinpos; |
8046 | u_int wrap_qinfifonext; |
8047 | |
8048 | AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK); |
8049 | qinpos = ahd_get_snscb_qoff(ahd); |
8050 | wrap_qinpos = AHD_QIN_WRAP(qinpos); |
8051 | wrap_qinfifonext = AHD_QIN_WRAP(ahd->qinfifonext); |
8052 | if (wrap_qinfifonext >= wrap_qinpos) |
8053 | return (wrap_qinfifonext - wrap_qinpos); |
8054 | else |
8055 | return (wrap_qinfifonext |
8056 | + ARRAY_SIZE(ahd->qinfifo) - wrap_qinpos); |
8057 | } |
8058 | |
8059 | static void |
8060 | ahd_reset_cmds_pending(struct ahd_softc *ahd) |
8061 | { |
8062 | struct scb *scb; |
8063 | ahd_mode_state saved_modes; |
8064 | u_int pending_cmds; |
8065 | |
8066 | saved_modes = ahd_save_modes(ahd); |
8067 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
8068 | |
8069 | /* |
8070 | * Don't count any commands as outstanding that the |
8071 | * sequencer has already marked for completion. |
8072 | */ |
8073 | ahd_flush_qoutfifo(ahd); |
8074 | |
8075 | pending_cmds = 0; |
8076 | LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) { |
8077 | pending_cmds++; |
8078 | } |
8079 | ahd_outw(ahd, CMDS_PENDING, pending_cmds - ahd_qinfifo_count(ahd)); |
8080 | ahd_restore_modes(ahd, state: saved_modes); |
8081 | ahd->flags &= ~AHD_UPDATE_PEND_CMDS; |
8082 | } |
8083 | |
8084 | static void |
8085 | ahd_done_with_status(struct ahd_softc *ahd, struct scb *scb, uint32_t status) |
8086 | { |
8087 | cam_status ostat; |
8088 | cam_status cstat; |
8089 | |
8090 | ostat = ahd_get_transaction_status(scb); |
8091 | if (ostat == CAM_REQ_INPROG) |
8092 | ahd_set_transaction_status(scb, status); |
8093 | cstat = ahd_get_transaction_status(scb); |
8094 | if (cstat != CAM_REQ_CMP) |
8095 | ahd_freeze_scb(scb); |
8096 | ahd_done(ahd, scb); |
8097 | } |
8098 | |
8099 | int |
8100 | ahd_search_qinfifo(struct ahd_softc *ahd, int target, char channel, |
8101 | int lun, u_int tag, role_t role, uint32_t status, |
8102 | ahd_search_action action) |
8103 | { |
8104 | struct scb *scb; |
8105 | struct scb *mk_msg_scb; |
8106 | struct scb *prev_scb; |
8107 | ahd_mode_state saved_modes; |
8108 | u_int qinstart; |
8109 | u_int qinpos; |
8110 | u_int qintail; |
8111 | u_int tid_next; |
8112 | u_int tid_prev; |
8113 | u_int scbid; |
8114 | u_int seq_flags2; |
8115 | u_int savedscbptr; |
8116 | uint32_t busaddr; |
8117 | int found; |
8118 | int targets; |
8119 | |
8120 | /* Must be in CCHAN mode */ |
8121 | saved_modes = ahd_save_modes(ahd); |
8122 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
8123 | |
8124 | /* |
8125 | * Halt any pending SCB DMA. The sequencer will reinitiate |
8126 | * this dma if the qinfifo is not empty once we unpause. |
8127 | */ |
8128 | if ((ahd_inb(ahd, CCSCBCTL) & (CCARREN|CCSCBEN|CCSCBDIR)) |
8129 | == (CCARREN|CCSCBEN|CCSCBDIR)) { |
8130 | ahd_outb(ahd, CCSCBCTL, |
8131 | ahd_inb(ahd, CCSCBCTL) & ~(CCARREN|CCSCBEN)); |
8132 | while ((ahd_inb(ahd, CCSCBCTL) & (CCARREN|CCSCBEN)) != 0) |
8133 | ; |
8134 | } |
8135 | /* Determine sequencer's position in the qinfifo. */ |
8136 | qintail = AHD_QIN_WRAP(ahd->qinfifonext); |
8137 | qinstart = ahd_get_snscb_qoff(ahd); |
8138 | qinpos = AHD_QIN_WRAP(qinstart); |
8139 | found = 0; |
8140 | prev_scb = NULL; |
8141 | |
8142 | if (action == SEARCH_PRINT) { |
8143 | printk("qinstart = %d qinfifonext = %d\nQINFIFO:" , |
8144 | qinstart, ahd->qinfifonext); |
8145 | } |
8146 | |
8147 | /* |
8148 | * Start with an empty queue. Entries that are not chosen |
8149 | * for removal will be re-added to the queue as we go. |
8150 | */ |
8151 | ahd->qinfifonext = qinstart; |
8152 | busaddr = ahd_le32toh(ahd->next_queued_hscb->hscb_busaddr); |
8153 | ahd_outl(ahd, NEXT_QUEUED_SCB_ADDR, busaddr); |
8154 | |
8155 | while (qinpos != qintail) { |
8156 | scb = ahd_lookup_scb(ahd, tag: ahd->qinfifo[qinpos]); |
8157 | if (scb == NULL) { |
8158 | printk("qinpos = %d, SCB index = %d\n" , |
8159 | qinpos, ahd->qinfifo[qinpos]); |
8160 | panic(fmt: "Loop 1\n" ); |
8161 | } |
8162 | |
8163 | if (ahd_match_scb(ahd, scb, target, channel, lun, tag, role)) { |
8164 | /* |
8165 | * We found an scb that needs to be acted on. |
8166 | */ |
8167 | found++; |
8168 | switch (action) { |
8169 | case SEARCH_COMPLETE: |
8170 | if ((scb->flags & SCB_ACTIVE) == 0) |
8171 | printk("Inactive SCB in qinfifo\n" ); |
8172 | ahd_done_with_status(ahd, scb, status); |
8173 | fallthrough; |
8174 | case SEARCH_REMOVE: |
8175 | break; |
8176 | case SEARCH_PRINT: |
8177 | printk(" 0x%x" , ahd->qinfifo[qinpos]); |
8178 | fallthrough; |
8179 | case SEARCH_COUNT: |
8180 | ahd_qinfifo_requeue(ahd, prev_scb, scb); |
8181 | prev_scb = scb; |
8182 | break; |
8183 | } |
8184 | } else { |
8185 | ahd_qinfifo_requeue(ahd, prev_scb, scb); |
8186 | prev_scb = scb; |
8187 | } |
8188 | qinpos = AHD_QIN_WRAP(qinpos+1); |
8189 | } |
8190 | |
8191 | ahd_set_hnscb_qoff(ahd, value: ahd->qinfifonext); |
8192 | |
8193 | if (action == SEARCH_PRINT) |
8194 | printk("\nWAITING_TID_QUEUES:\n" ); |
8195 | |
8196 | /* |
8197 | * Search waiting for selection lists. We traverse the |
8198 | * list of "their ids" waiting for selection and, if |
8199 | * appropriate, traverse the SCBs of each "their id" |
8200 | * looking for matches. |
8201 | */ |
8202 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
8203 | seq_flags2 = ahd_inb(ahd, SEQ_FLAGS2); |
8204 | if ((seq_flags2 & PENDING_MK_MESSAGE) != 0) { |
8205 | scbid = ahd_inw(ahd, MK_MESSAGE_SCB); |
8206 | mk_msg_scb = ahd_lookup_scb(ahd, tag: scbid); |
8207 | } else |
8208 | mk_msg_scb = NULL; |
8209 | savedscbptr = ahd_get_scbptr(ahd); |
8210 | tid_next = ahd_inw(ahd, WAITING_TID_HEAD); |
8211 | tid_prev = SCB_LIST_NULL; |
8212 | targets = 0; |
8213 | for (scbid = tid_next; !SCBID_IS_NULL(scbid); scbid = tid_next) { |
8214 | u_int tid_head; |
8215 | u_int tid_tail; |
8216 | |
8217 | targets++; |
8218 | if (targets > AHD_NUM_TARGETS) |
8219 | panic(fmt: "TID LIST LOOP" ); |
8220 | |
8221 | if (scbid >= ahd->scb_data.numscbs) { |
8222 | printk("%s: Waiting TID List inconsistency. " |
8223 | "SCB index == 0x%x, yet numscbs == 0x%x." , |
8224 | ahd_name(ahd), scbid, ahd->scb_data.numscbs); |
8225 | ahd_dump_card_state(ahd); |
8226 | panic(fmt: "for safety" ); |
8227 | } |
8228 | scb = ahd_lookup_scb(ahd, tag: scbid); |
8229 | if (scb == NULL) { |
8230 | printk("%s: SCB = 0x%x Not Active!\n" , |
8231 | ahd_name(ahd), scbid); |
8232 | panic(fmt: "Waiting TID List traversal\n" ); |
8233 | } |
8234 | ahd_set_scbptr(ahd, scbptr: scbid); |
8235 | tid_next = ahd_inw_scbram(ahd, SCB_NEXT2); |
8236 | if (ahd_match_scb(ahd, scb, target, channel, CAM_LUN_WILDCARD, |
8237 | SCB_LIST_NULL, role: ROLE_UNKNOWN) == 0) { |
8238 | tid_prev = scbid; |
8239 | continue; |
8240 | } |
8241 | |
8242 | /* |
8243 | * We found a list of scbs that needs to be searched. |
8244 | */ |
8245 | if (action == SEARCH_PRINT) |
8246 | printk(" %d ( " , SCB_GET_TARGET(ahd, scb)); |
8247 | tid_head = scbid; |
8248 | found += ahd_search_scb_list(ahd, target, channel, |
8249 | lun, tag, role, status, |
8250 | action, &tid_head, &tid_tail, |
8251 | SCB_GET_TARGET(ahd, scb)); |
8252 | /* |
8253 | * Check any MK_MESSAGE SCB that is still waiting to |
8254 | * enter this target's waiting for selection queue. |
8255 | */ |
8256 | if (mk_msg_scb != NULL |
8257 | && ahd_match_scb(ahd, scb: mk_msg_scb, target, channel, |
8258 | lun, tag, role)) { |
8259 | |
8260 | /* |
8261 | * We found an scb that needs to be acted on. |
8262 | */ |
8263 | found++; |
8264 | switch (action) { |
8265 | case SEARCH_COMPLETE: |
8266 | if ((mk_msg_scb->flags & SCB_ACTIVE) == 0) |
8267 | printk("Inactive SCB pending MK_MSG\n" ); |
8268 | ahd_done_with_status(ahd, scb: mk_msg_scb, status); |
8269 | fallthrough; |
8270 | case SEARCH_REMOVE: |
8271 | { |
8272 | u_int tail_offset; |
8273 | |
8274 | printk("Removing MK_MSG scb\n" ); |
8275 | |
8276 | /* |
8277 | * Reset our tail to the tail of the |
8278 | * main per-target list. |
8279 | */ |
8280 | tail_offset = WAITING_SCB_TAILS |
8281 | + (2 * SCB_GET_TARGET(ahd, mk_msg_scb)); |
8282 | ahd_outw(ahd, port: tail_offset, value: tid_tail); |
8283 | |
8284 | seq_flags2 &= ~PENDING_MK_MESSAGE; |
8285 | ahd_outb(ahd, SEQ_FLAGS2, seq_flags2); |
8286 | ahd_outw(ahd, CMDS_PENDING, |
8287 | ahd_inw(ahd, CMDS_PENDING)-1); |
8288 | mk_msg_scb = NULL; |
8289 | break; |
8290 | } |
8291 | case SEARCH_PRINT: |
8292 | printk(" 0x%x" , SCB_GET_TAG(scb)); |
8293 | fallthrough; |
8294 | case SEARCH_COUNT: |
8295 | break; |
8296 | } |
8297 | } |
8298 | |
8299 | if (mk_msg_scb != NULL |
8300 | && SCBID_IS_NULL(tid_head) |
8301 | && ahd_match_scb(ahd, scb, target, channel, CAM_LUN_WILDCARD, |
8302 | SCB_LIST_NULL, role: ROLE_UNKNOWN)) { |
8303 | |
8304 | /* |
8305 | * When removing the last SCB for a target |
8306 | * queue with a pending MK_MESSAGE scb, we |
8307 | * must queue the MK_MESSAGE scb. |
8308 | */ |
8309 | printk("Queueing mk_msg_scb\n" ); |
8310 | tid_head = ahd_inw(ahd, MK_MESSAGE_SCB); |
8311 | seq_flags2 &= ~PENDING_MK_MESSAGE; |
8312 | ahd_outb(ahd, SEQ_FLAGS2, seq_flags2); |
8313 | mk_msg_scb = NULL; |
8314 | } |
8315 | if (tid_head != scbid) |
8316 | ahd_stitch_tid_list(ahd, tid_prev, tid_cur: tid_head, tid_next); |
8317 | if (!SCBID_IS_NULL(tid_head)) |
8318 | tid_prev = tid_head; |
8319 | if (action == SEARCH_PRINT) |
8320 | printk(")\n" ); |
8321 | } |
8322 | |
8323 | /* Restore saved state. */ |
8324 | ahd_set_scbptr(ahd, scbptr: savedscbptr); |
8325 | ahd_restore_modes(ahd, state: saved_modes); |
8326 | return (found); |
8327 | } |
8328 | |
8329 | static int |
8330 | ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel, |
8331 | int lun, u_int tag, role_t role, uint32_t status, |
8332 | ahd_search_action action, u_int *list_head, |
8333 | u_int *list_tail, u_int tid) |
8334 | { |
8335 | struct scb *scb; |
8336 | u_int scbid; |
8337 | u_int next; |
8338 | u_int prev; |
8339 | int found; |
8340 | |
8341 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
8342 | found = 0; |
8343 | prev = SCB_LIST_NULL; |
8344 | next = *list_head; |
8345 | *list_tail = SCB_LIST_NULL; |
8346 | for (scbid = next; !SCBID_IS_NULL(scbid); scbid = next) { |
8347 | if (scbid >= ahd->scb_data.numscbs) { |
8348 | printk("%s:SCB List inconsistency. " |
8349 | "SCB == 0x%x, yet numscbs == 0x%x." , |
8350 | ahd_name(ahd), scbid, ahd->scb_data.numscbs); |
8351 | ahd_dump_card_state(ahd); |
8352 | panic(fmt: "for safety" ); |
8353 | } |
8354 | scb = ahd_lookup_scb(ahd, tag: scbid); |
8355 | if (scb == NULL) { |
8356 | printk("%s: SCB = %d Not Active!\n" , |
8357 | ahd_name(ahd), scbid); |
8358 | panic(fmt: "Waiting List traversal\n" ); |
8359 | } |
8360 | ahd_set_scbptr(ahd, scbptr: scbid); |
8361 | *list_tail = scbid; |
8362 | next = ahd_inw_scbram(ahd, SCB_NEXT); |
8363 | if (ahd_match_scb(ahd, scb, target, channel, |
8364 | lun, SCB_LIST_NULL, role) == 0) { |
8365 | prev = scbid; |
8366 | continue; |
8367 | } |
8368 | found++; |
8369 | switch (action) { |
8370 | case SEARCH_COMPLETE: |
8371 | if ((scb->flags & SCB_ACTIVE) == 0) |
8372 | printk("Inactive SCB in Waiting List\n" ); |
8373 | ahd_done_with_status(ahd, scb, status); |
8374 | fallthrough; |
8375 | case SEARCH_REMOVE: |
8376 | ahd_rem_wscb(ahd, scbid, prev, next, tid); |
8377 | *list_tail = prev; |
8378 | if (SCBID_IS_NULL(prev)) |
8379 | *list_head = next; |
8380 | break; |
8381 | case SEARCH_PRINT: |
8382 | printk("0x%x " , scbid); |
8383 | fallthrough; |
8384 | case SEARCH_COUNT: |
8385 | prev = scbid; |
8386 | break; |
8387 | } |
8388 | if (found > AHD_SCB_MAX) |
8389 | panic(fmt: "SCB LIST LOOP" ); |
8390 | } |
8391 | if (action == SEARCH_COMPLETE |
8392 | || action == SEARCH_REMOVE) |
8393 | ahd_outw(ahd, CMDS_PENDING, ahd_inw(ahd, CMDS_PENDING) - found); |
8394 | return (found); |
8395 | } |
8396 | |
8397 | static void |
8398 | ahd_stitch_tid_list(struct ahd_softc *ahd, u_int tid_prev, |
8399 | u_int tid_cur, u_int tid_next) |
8400 | { |
8401 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
8402 | |
8403 | if (SCBID_IS_NULL(tid_cur)) { |
8404 | |
8405 | /* Bypass current TID list */ |
8406 | if (SCBID_IS_NULL(tid_prev)) { |
8407 | ahd_outw(ahd, WAITING_TID_HEAD, tid_next); |
8408 | } else { |
8409 | ahd_set_scbptr(ahd, scbptr: tid_prev); |
8410 | ahd_outw(ahd, SCB_NEXT2, tid_next); |
8411 | } |
8412 | if (SCBID_IS_NULL(tid_next)) |
8413 | ahd_outw(ahd, WAITING_TID_TAIL, tid_prev); |
8414 | } else { |
8415 | |
8416 | /* Stitch through tid_cur */ |
8417 | if (SCBID_IS_NULL(tid_prev)) { |
8418 | ahd_outw(ahd, WAITING_TID_HEAD, tid_cur); |
8419 | } else { |
8420 | ahd_set_scbptr(ahd, scbptr: tid_prev); |
8421 | ahd_outw(ahd, SCB_NEXT2, tid_cur); |
8422 | } |
8423 | ahd_set_scbptr(ahd, scbptr: tid_cur); |
8424 | ahd_outw(ahd, SCB_NEXT2, tid_next); |
8425 | |
8426 | if (SCBID_IS_NULL(tid_next)) |
8427 | ahd_outw(ahd, WAITING_TID_TAIL, tid_cur); |
8428 | } |
8429 | } |
8430 | |
8431 | /* |
8432 | * Manipulate the waiting for selection list and return the |
8433 | * scb that follows the one that we remove. |
8434 | */ |
8435 | static u_int |
8436 | ahd_rem_wscb(struct ahd_softc *ahd, u_int scbid, |
8437 | u_int prev, u_int next, u_int tid) |
8438 | { |
8439 | u_int tail_offset; |
8440 | |
8441 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
8442 | if (!SCBID_IS_NULL(prev)) { |
8443 | ahd_set_scbptr(ahd, scbptr: prev); |
8444 | ahd_outw(ahd, SCB_NEXT, next); |
8445 | } |
8446 | |
8447 | /* |
8448 | * SCBs that have MK_MESSAGE set in them may |
8449 | * cause the tail pointer to be updated without |
8450 | * setting the next pointer of the previous tail. |
8451 | * Only clear the tail if the removed SCB was |
8452 | * the tail. |
8453 | */ |
8454 | tail_offset = WAITING_SCB_TAILS + (2 * tid); |
8455 | if (SCBID_IS_NULL(next) |
8456 | && ahd_inw(ahd, port: tail_offset) == scbid) |
8457 | ahd_outw(ahd, port: tail_offset, value: prev); |
8458 | |
8459 | ahd_add_scb_to_free_list(ahd, scbid); |
8460 | return (next); |
8461 | } |
8462 | |
8463 | /* |
8464 | * Add the SCB as selected by SCBPTR onto the on chip list of |
8465 | * free hardware SCBs. This list is empty/unused if we are not |
8466 | * performing SCB paging. |
8467 | */ |
8468 | static void |
8469 | ahd_add_scb_to_free_list(struct ahd_softc *ahd, u_int scbid) |
8470 | { |
8471 | /* XXX Need some other mechanism to designate "free". */ |
8472 | /* |
8473 | * Invalidate the tag so that our abort |
8474 | * routines don't think it's active. |
8475 | ahd_outb(ahd, SCB_TAG, SCB_LIST_NULL); |
8476 | */ |
8477 | } |
8478 | |
8479 | /******************************** Error Handling ******************************/ |
8480 | /* |
8481 | * Abort all SCBs that match the given description (target/channel/lun/tag), |
8482 | * setting their status to the passed in status if the status has not already |
8483 | * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer |
8484 | * is paused before it is called. |
8485 | */ |
8486 | static int |
8487 | ahd_abort_scbs(struct ahd_softc *ahd, int target, char channel, |
8488 | int lun, u_int tag, role_t role, uint32_t status) |
8489 | { |
8490 | struct scb *scbp; |
8491 | struct scb *scbp_next; |
8492 | u_int i, j; |
8493 | u_int maxtarget; |
8494 | u_int minlun; |
8495 | u_int maxlun; |
8496 | int found; |
8497 | ahd_mode_state saved_modes; |
8498 | |
8499 | /* restore this when we're done */ |
8500 | saved_modes = ahd_save_modes(ahd); |
8501 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
8502 | |
8503 | found = ahd_search_qinfifo(ahd, target, channel, lun, SCB_LIST_NULL, |
8504 | role, status: CAM_REQUEUE_REQ, action: SEARCH_COMPLETE); |
8505 | |
8506 | /* |
8507 | * Clean out the busy target table for any untagged commands. |
8508 | */ |
8509 | i = 0; |
8510 | maxtarget = 16; |
8511 | if (target != CAM_TARGET_WILDCARD) { |
8512 | i = target; |
8513 | if (channel == 'B') |
8514 | i += 8; |
8515 | maxtarget = i + 1; |
8516 | } |
8517 | |
8518 | if (lun == CAM_LUN_WILDCARD) { |
8519 | minlun = 0; |
8520 | maxlun = AHD_NUM_LUNS_NONPKT; |
8521 | } else if (lun >= AHD_NUM_LUNS_NONPKT) { |
8522 | minlun = maxlun = 0; |
8523 | } else { |
8524 | minlun = lun; |
8525 | maxlun = lun + 1; |
8526 | } |
8527 | |
8528 | if (role != ROLE_TARGET) { |
8529 | for (;i < maxtarget; i++) { |
8530 | for (j = minlun;j < maxlun; j++) { |
8531 | u_int scbid; |
8532 | u_int tcl; |
8533 | |
8534 | tcl = BUILD_TCL_RAW(i, 'A', j); |
8535 | scbid = ahd_find_busy_tcl(ahd, tcl); |
8536 | scbp = ahd_lookup_scb(ahd, tag: scbid); |
8537 | if (scbp == NULL |
8538 | || ahd_match_scb(ahd, scb: scbp, target, channel, |
8539 | lun, tag, role) == 0) |
8540 | continue; |
8541 | ahd_unbusy_tcl(ahd, BUILD_TCL_RAW(i, 'A', j)); |
8542 | } |
8543 | } |
8544 | } |
8545 | |
8546 | /* |
8547 | * Don't abort commands that have already completed, |
8548 | * but haven't quite made it up to the host yet. |
8549 | */ |
8550 | ahd_flush_qoutfifo(ahd); |
8551 | |
8552 | /* |
8553 | * Go through the pending CCB list and look for |
8554 | * commands for this target that are still active. |
8555 | * These are other tagged commands that were |
8556 | * disconnected when the reset occurred. |
8557 | */ |
8558 | scbp_next = LIST_FIRST(&ahd->pending_scbs); |
8559 | while (scbp_next != NULL) { |
8560 | scbp = scbp_next; |
8561 | scbp_next = LIST_NEXT(scbp, pending_links); |
8562 | if (ahd_match_scb(ahd, scb: scbp, target, channel, lun, tag, role)) { |
8563 | cam_status ostat; |
8564 | |
8565 | ostat = ahd_get_transaction_status(scb: scbp); |
8566 | if (ostat == CAM_REQ_INPROG) |
8567 | ahd_set_transaction_status(scb: scbp, status); |
8568 | if (ahd_get_transaction_status(scb: scbp) != CAM_REQ_CMP) |
8569 | ahd_freeze_scb(scb: scbp); |
8570 | if ((scbp->flags & SCB_ACTIVE) == 0) |
8571 | printk("Inactive SCB on pending list\n" ); |
8572 | ahd_done(ahd, scbp); |
8573 | found++; |
8574 | } |
8575 | } |
8576 | ahd_restore_modes(ahd, state: saved_modes); |
8577 | ahd_platform_abort_scbs(ahd, target, channel, lun, tag, role, status); |
8578 | ahd->flags |= AHD_UPDATE_PEND_CMDS; |
8579 | return found; |
8580 | } |
8581 | |
8582 | static void |
8583 | ahd_reset_current_bus(struct ahd_softc *ahd) |
8584 | { |
8585 | uint8_t scsiseq; |
8586 | |
8587 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
8588 | ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) & ~ENSCSIRST); |
8589 | scsiseq = ahd_inb(ahd, SCSISEQ0) & ~(ENSELO|ENARBO|SCSIRSTO); |
8590 | ahd_outb(ahd, SCSISEQ0, scsiseq | SCSIRSTO); |
8591 | ahd_flush_device_writes(ahd); |
8592 | ahd_delay(AHD_BUSRESET_DELAY); |
8593 | /* Turn off the bus reset */ |
8594 | ahd_outb(ahd, SCSISEQ0, scsiseq); |
8595 | ahd_flush_device_writes(ahd); |
8596 | ahd_delay(AHD_BUSRESET_DELAY); |
8597 | if ((ahd->bugs & AHD_SCSIRST_BUG) != 0) { |
8598 | /* |
8599 | * 2A Razor #474 |
8600 | * Certain chip state is not cleared for |
8601 | * SCSI bus resets that we initiate, so |
8602 | * we must reset the chip. |
8603 | */ |
8604 | ahd_reset(ahd, /*reinit*/TRUE); |
8605 | ahd_intr_enable(ahd, /*enable*/TRUE); |
8606 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
8607 | } |
8608 | |
8609 | ahd_clear_intstat(ahd); |
8610 | } |
8611 | |
8612 | int |
8613 | ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset) |
8614 | { |
8615 | struct ahd_devinfo caminfo; |
8616 | u_int initiator; |
8617 | u_int target; |
8618 | u_int max_scsiid; |
8619 | int found; |
8620 | u_int fifo; |
8621 | u_int next_fifo; |
8622 | uint8_t scsiseq; |
8623 | |
8624 | /* |
8625 | * Check if the last bus reset is cleared |
8626 | */ |
8627 | if (ahd->flags & AHD_BUS_RESET_ACTIVE) { |
8628 | printk("%s: bus reset still active\n" , |
8629 | ahd_name(ahd)); |
8630 | return 0; |
8631 | } |
8632 | ahd->flags |= AHD_BUS_RESET_ACTIVE; |
8633 | |
8634 | ahd->pending_device = NULL; |
8635 | |
8636 | ahd_compile_devinfo(devinfo: &caminfo, |
8637 | CAM_TARGET_WILDCARD, |
8638 | CAM_TARGET_WILDCARD, |
8639 | CAM_LUN_WILDCARD, |
8640 | channel, role: ROLE_UNKNOWN); |
8641 | ahd_pause(ahd); |
8642 | |
8643 | /* Make sure the sequencer is in a safe location. */ |
8644 | ahd_clear_critical_section(ahd); |
8645 | |
8646 | /* |
8647 | * Run our command complete fifos to ensure that we perform |
8648 | * completion processing on any commands that 'completed' |
8649 | * before the reset occurred. |
8650 | */ |
8651 | ahd_run_qoutfifo(ahd); |
8652 | #ifdef AHD_TARGET_MODE |
8653 | if ((ahd->flags & AHD_TARGETROLE) != 0) { |
8654 | ahd_run_tqinfifo(ahd, /*paused*/TRUE); |
8655 | } |
8656 | #endif |
8657 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
8658 | |
8659 | /* |
8660 | * Disable selections so no automatic hardware |
8661 | * functions will modify chip state. |
8662 | */ |
8663 | ahd_outb(ahd, SCSISEQ0, 0); |
8664 | ahd_outb(ahd, SCSISEQ1, 0); |
8665 | |
8666 | /* |
8667 | * Safely shut down our DMA engines. Always start with |
8668 | * the FIFO that is not currently active (if any are |
8669 | * actively connected). |
8670 | */ |
8671 | next_fifo = fifo = ahd_inb(ahd, DFFSTAT) & CURRFIFO; |
8672 | if (next_fifo > CURRFIFO_1) |
8673 | /* If disconneced, arbitrarily start with FIFO1. */ |
8674 | next_fifo = fifo = 0; |
8675 | do { |
8676 | next_fifo ^= CURRFIFO_1; |
8677 | ahd_set_modes(ahd, src: next_fifo, dst: next_fifo); |
8678 | ahd_outb(ahd, DFCNTRL, |
8679 | ahd_inb(ahd, DFCNTRL) & ~(SCSIEN|HDMAEN)); |
8680 | while ((ahd_inb(ahd, DFCNTRL) & HDMAENACK) != 0) |
8681 | ahd_delay(10); |
8682 | /* |
8683 | * Set CURRFIFO to the now inactive channel. |
8684 | */ |
8685 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
8686 | ahd_outb(ahd, DFFSTAT, next_fifo); |
8687 | } while (next_fifo != fifo); |
8688 | |
8689 | /* |
8690 | * Reset the bus if we are initiating this reset |
8691 | */ |
8692 | ahd_clear_msg_state(ahd); |
8693 | ahd_outb(ahd, SIMODE1, |
8694 | ahd_inb(ahd, SIMODE1) & ~(ENBUSFREE|ENSCSIRST)); |
8695 | |
8696 | if (initiate_reset) |
8697 | ahd_reset_current_bus(ahd); |
8698 | |
8699 | ahd_clear_intstat(ahd); |
8700 | |
8701 | /* |
8702 | * Clean up all the state information for the |
8703 | * pending transactions on this bus. |
8704 | */ |
8705 | found = ahd_abort_scbs(ahd, CAM_TARGET_WILDCARD, channel, |
8706 | CAM_LUN_WILDCARD, SCB_LIST_NULL, |
8707 | role: ROLE_UNKNOWN, status: CAM_SCSI_BUS_RESET); |
8708 | |
8709 | /* |
8710 | * Cleanup anything left in the FIFOs. |
8711 | */ |
8712 | ahd_clear_fifo(ahd, fifo: 0); |
8713 | ahd_clear_fifo(ahd, fifo: 1); |
8714 | |
8715 | /* |
8716 | * Clear SCSI interrupt status |
8717 | */ |
8718 | ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI); |
8719 | |
8720 | /* |
8721 | * Reenable selections |
8722 | */ |
8723 | ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) | ENSCSIRST); |
8724 | scsiseq = ahd_inb(ahd, SCSISEQ_TEMPLATE); |
8725 | ahd_outb(ahd, SCSISEQ1, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); |
8726 | |
8727 | max_scsiid = (ahd->features & AHD_WIDE) ? 15 : 7; |
8728 | #ifdef AHD_TARGET_MODE |
8729 | /* |
8730 | * Send an immediate notify ccb to all target more peripheral |
8731 | * drivers affected by this action. |
8732 | */ |
8733 | for (target = 0; target <= max_scsiid; target++) { |
8734 | struct ahd_tmode_tstate* tstate; |
8735 | u_int lun; |
8736 | |
8737 | tstate = ahd->enabled_targets[target]; |
8738 | if (tstate == NULL) |
8739 | continue; |
8740 | for (lun = 0; lun < AHD_NUM_LUNS; lun++) { |
8741 | struct ahd_tmode_lstate* lstate; |
8742 | |
8743 | lstate = tstate->enabled_luns[lun]; |
8744 | if (lstate == NULL) |
8745 | continue; |
8746 | |
8747 | ahd_queue_lstate_event(ahd, lstate, CAM_TARGET_WILDCARD, |
8748 | EVENT_TYPE_BUS_RESET, /*arg*/0); |
8749 | ahd_send_lstate_events(ahd, lstate); |
8750 | } |
8751 | } |
8752 | #endif |
8753 | /* |
8754 | * Revert to async/narrow transfers until we renegotiate. |
8755 | */ |
8756 | for (target = 0; target <= max_scsiid; target++) { |
8757 | |
8758 | if (ahd->enabled_targets[target] == NULL) |
8759 | continue; |
8760 | for (initiator = 0; initiator <= max_scsiid; initiator++) { |
8761 | struct ahd_devinfo devinfo; |
8762 | |
8763 | ahd_compile_devinfo(devinfo: &devinfo, our_id: target, target: initiator, |
8764 | CAM_LUN_WILDCARD, |
8765 | channel: 'A', role: ROLE_UNKNOWN); |
8766 | ahd_set_width(ahd, devinfo: &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
8767 | AHD_TRANS_CUR, /*paused*/TRUE); |
8768 | ahd_set_syncrate(ahd, devinfo: &devinfo, /*period*/0, |
8769 | /*offset*/0, /*ppr_options*/0, |
8770 | AHD_TRANS_CUR, /*paused*/TRUE); |
8771 | } |
8772 | } |
8773 | |
8774 | /* Notify the XPT that a bus reset occurred */ |
8775 | ahd_send_async(ahd, channel: caminfo.channel, CAM_TARGET_WILDCARD, |
8776 | CAM_LUN_WILDCARD, AC_BUS_RESET); |
8777 | |
8778 | ahd_restart(ahd); |
8779 | |
8780 | return (found); |
8781 | } |
8782 | |
8783 | /**************************** Statistics Processing ***************************/ |
8784 | static void |
8785 | ahd_stat_timer(struct timer_list *t) |
8786 | { |
8787 | struct ahd_softc *ahd = from_timer(ahd, t, stat_timer); |
8788 | u_long s; |
8789 | int enint_coal; |
8790 | |
8791 | ahd_lock(ahd, flags: &s); |
8792 | |
8793 | enint_coal = ahd->hs_mailbox & ENINT_COALESCE; |
8794 | if (ahd->cmdcmplt_total > ahd->int_coalescing_threshold) |
8795 | enint_coal |= ENINT_COALESCE; |
8796 | else if (ahd->cmdcmplt_total < ahd->int_coalescing_stop_threshold) |
8797 | enint_coal &= ~ENINT_COALESCE; |
8798 | |
8799 | if (enint_coal != (ahd->hs_mailbox & ENINT_COALESCE)) { |
8800 | ahd_enable_coalescing(ahd, enable: enint_coal); |
8801 | #ifdef AHD_DEBUG |
8802 | if ((ahd_debug & AHD_SHOW_INT_COALESCING) != 0) |
8803 | printk("%s: Interrupt coalescing " |
8804 | "now %sabled. Cmds %d\n" , |
8805 | ahd_name(ahd), |
8806 | (enint_coal & ENINT_COALESCE) ? "en" : "dis" , |
8807 | ahd->cmdcmplt_total); |
8808 | #endif |
8809 | } |
8810 | |
8811 | ahd->cmdcmplt_bucket = (ahd->cmdcmplt_bucket+1) & (AHD_STAT_BUCKETS-1); |
8812 | ahd->cmdcmplt_total -= ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket]; |
8813 | ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket] = 0; |
8814 | ahd_timer_reset(timer: &ahd->stat_timer, AHD_STAT_UPDATE_US); |
8815 | ahd_unlock(ahd, flags: &s); |
8816 | } |
8817 | |
8818 | /****************************** Status Processing *****************************/ |
8819 | |
8820 | static void |
8821 | ahd_handle_scsi_status(struct ahd_softc *ahd, struct scb *scb) |
8822 | { |
8823 | struct hardware_scb *hscb; |
8824 | int paused; |
8825 | |
8826 | /* |
8827 | * The sequencer freezes its select-out queue |
8828 | * anytime a SCSI status error occurs. We must |
8829 | * handle the error and increment our qfreeze count |
8830 | * to allow the sequencer to continue. We don't |
8831 | * bother clearing critical sections here since all |
8832 | * operations are on data structures that the sequencer |
8833 | * is not touching once the queue is frozen. |
8834 | */ |
8835 | hscb = scb->hscb; |
8836 | |
8837 | if (ahd_is_paused(ahd)) { |
8838 | paused = 1; |
8839 | } else { |
8840 | paused = 0; |
8841 | ahd_pause(ahd); |
8842 | } |
8843 | |
8844 | /* Freeze the queue until the client sees the error. */ |
8845 | ahd_freeze_devq(ahd, scb); |
8846 | ahd_freeze_scb(scb); |
8847 | ahd->qfreeze_cnt++; |
8848 | ahd_outw(ahd, KERNEL_QFREEZE_COUNT, ahd->qfreeze_cnt); |
8849 | |
8850 | if (paused == 0) |
8851 | ahd_unpause(ahd); |
8852 | |
8853 | /* Don't want to clobber the original sense code */ |
8854 | if ((scb->flags & SCB_SENSE) != 0) { |
8855 | /* |
8856 | * Clear the SCB_SENSE Flag and perform |
8857 | * a normal command completion. |
8858 | */ |
8859 | scb->flags &= ~SCB_SENSE; |
8860 | ahd_set_transaction_status(scb, status: CAM_AUTOSENSE_FAIL); |
8861 | ahd_done(ahd, scb); |
8862 | return; |
8863 | } |
8864 | ahd_set_transaction_status(scb, status: CAM_SCSI_STATUS_ERROR); |
8865 | ahd_set_scsi_status(scb, status: hscb->shared_data.istatus.scsi_status); |
8866 | switch (hscb->shared_data.istatus.scsi_status) { |
8867 | case STATUS_PKT_SENSE: |
8868 | { |
8869 | struct scsi_status_iu_header *siu; |
8870 | |
8871 | ahd_sync_sense(ahd, scb, BUS_DMASYNC_POSTREAD); |
8872 | siu = (struct scsi_status_iu_header *)scb->sense_data; |
8873 | ahd_set_scsi_status(scb, status: siu->status); |
8874 | #ifdef AHD_DEBUG |
8875 | if ((ahd_debug & AHD_SHOW_SENSE) != 0) { |
8876 | ahd_print_path(ahd, scb); |
8877 | printk("SCB 0x%x Received PKT Status of 0x%x\n" , |
8878 | SCB_GET_TAG(scb), siu->status); |
8879 | printk("\tflags = 0x%x, sense len = 0x%x, " |
8880 | "pktfail = 0x%x\n" , |
8881 | siu->flags, scsi_4btoul(siu->sense_length), |
8882 | scsi_4btoul(siu->pkt_failures_length)); |
8883 | } |
8884 | #endif |
8885 | if ((siu->flags & SIU_RSPVALID) != 0) { |
8886 | ahd_print_path(ahd, scb); |
8887 | if (scsi_4btoul(bytes: siu->pkt_failures_length) < 4) { |
8888 | printk("Unable to parse pkt_failures\n" ); |
8889 | } else { |
8890 | |
8891 | switch (SIU_PKTFAIL_CODE(siu)) { |
8892 | case SIU_PFC_NONE: |
8893 | printk("No packet failure found\n" ); |
8894 | break; |
8895 | case SIU_PFC_CIU_FIELDS_INVALID: |
8896 | printk("Invalid Command IU Field\n" ); |
8897 | break; |
8898 | case SIU_PFC_TMF_NOT_SUPPORTED: |
8899 | printk("TMF not supported\n" ); |
8900 | break; |
8901 | case SIU_PFC_TMF_FAILED: |
8902 | printk("TMF failed\n" ); |
8903 | break; |
8904 | case SIU_PFC_INVALID_TYPE_CODE: |
8905 | printk("Invalid L_Q Type code\n" ); |
8906 | break; |
8907 | case SIU_PFC_ILLEGAL_REQUEST: |
8908 | printk("Illegal request\n" ); |
8909 | break; |
8910 | default: |
8911 | break; |
8912 | } |
8913 | } |
8914 | if (siu->status == SAM_STAT_GOOD) |
8915 | ahd_set_transaction_status(scb, |
8916 | status: CAM_REQ_CMP_ERR); |
8917 | } |
8918 | if ((siu->flags & SIU_SNSVALID) != 0) { |
8919 | scb->flags |= SCB_PKT_SENSE; |
8920 | #ifdef AHD_DEBUG |
8921 | if ((ahd_debug & AHD_SHOW_SENSE) != 0) |
8922 | printk("Sense data available\n" ); |
8923 | #endif |
8924 | } |
8925 | ahd_done(ahd, scb); |
8926 | break; |
8927 | } |
8928 | case SAM_STAT_COMMAND_TERMINATED: |
8929 | case SAM_STAT_CHECK_CONDITION: |
8930 | { |
8931 | struct ahd_devinfo devinfo; |
8932 | struct ahd_dma_seg *sg; |
8933 | struct scsi_sense *sc; |
8934 | struct ahd_initiator_tinfo *targ_info; |
8935 | struct ahd_tmode_tstate *tstate; |
8936 | struct ahd_transinfo *tinfo; |
8937 | #ifdef AHD_DEBUG |
8938 | if (ahd_debug & AHD_SHOW_SENSE) { |
8939 | ahd_print_path(ahd, scb); |
8940 | printk("SCB %d: requests Check Status\n" , |
8941 | SCB_GET_TAG(scb)); |
8942 | } |
8943 | #endif |
8944 | |
8945 | if (ahd_perform_autosense(scb) == 0) |
8946 | break; |
8947 | |
8948 | ahd_compile_devinfo(&devinfo, SCB_GET_OUR_ID(scb), |
8949 | SCB_GET_TARGET(ahd, scb), |
8950 | SCB_GET_LUN(scb), |
8951 | SCB_GET_CHANNEL(ahd, scb), |
8952 | ROLE_INITIATOR); |
8953 | targ_info = ahd_fetch_transinfo(ahd, |
8954 | channel: devinfo.channel, |
8955 | our_id: devinfo.our_scsiid, |
8956 | remote_id: devinfo.target, |
8957 | tstate: &tstate); |
8958 | tinfo = &targ_info->curr; |
8959 | sg = scb->sg_list; |
8960 | sc = (struct scsi_sense *)hscb->shared_data.idata.cdb; |
8961 | /* |
8962 | * Save off the residual if there is one. |
8963 | */ |
8964 | ahd_update_residual(ahd, scb); |
8965 | #ifdef AHD_DEBUG |
8966 | if (ahd_debug & AHD_SHOW_SENSE) { |
8967 | ahd_print_path(ahd, scb); |
8968 | printk("Sending Sense\n" ); |
8969 | } |
8970 | #endif |
8971 | scb->sg_count = 0; |
8972 | sg = ahd_sg_setup(ahd, scb, sgptr: sg, addr: ahd_get_sense_bufaddr(ahd, scb), |
8973 | len: ahd_get_sense_bufsize(ahd, scb), |
8974 | /*last*/TRUE); |
8975 | sc->opcode = REQUEST_SENSE; |
8976 | sc->byte2 = 0; |
8977 | if (tinfo->protocol_version <= SCSI_REV_2 |
8978 | && SCB_GET_LUN(scb) < 8) |
8979 | sc->byte2 = SCB_GET_LUN(scb) << 5; |
8980 | sc->unused[0] = 0; |
8981 | sc->unused[1] = 0; |
8982 | sc->length = ahd_get_sense_bufsize(ahd, scb); |
8983 | sc->control = 0; |
8984 | |
8985 | /* |
8986 | * We can't allow the target to disconnect. |
8987 | * This will be an untagged transaction and |
8988 | * having the target disconnect will make this |
8989 | * transaction indestinguishable from outstanding |
8990 | * tagged transactions. |
8991 | */ |
8992 | hscb->control = 0; |
8993 | |
8994 | /* |
8995 | * This request sense could be because the |
8996 | * the device lost power or in some other |
8997 | * way has lost our transfer negotiations. |
8998 | * Renegotiate if appropriate. Unit attention |
8999 | * errors will be reported before any data |
9000 | * phases occur. |
9001 | */ |
9002 | if (ahd_get_residual(scb) == ahd_get_transfer_length(scb)) { |
9003 | ahd_update_neg_request(ahd, devinfo: &devinfo, |
9004 | tstate, tinfo: targ_info, |
9005 | neg_type: AHD_NEG_IF_NON_ASYNC); |
9006 | } |
9007 | if (tstate->auto_negotiate & devinfo.target_mask) { |
9008 | hscb->control |= MK_MESSAGE; |
9009 | scb->flags &= |
9010 | ~(SCB_NEGOTIATE|SCB_ABORT|SCB_DEVICE_RESET); |
9011 | scb->flags |= SCB_AUTO_NEGOTIATE; |
9012 | } |
9013 | hscb->cdb_len = sizeof(*sc); |
9014 | ahd_setup_data_scb(ahd, scb); |
9015 | scb->flags |= SCB_SENSE; |
9016 | ahd_queue_scb(ahd, scb); |
9017 | break; |
9018 | } |
9019 | case SAM_STAT_GOOD: |
9020 | printk("%s: Interrupted for status of 0???\n" , |
9021 | ahd_name(ahd)); |
9022 | fallthrough; |
9023 | default: |
9024 | ahd_done(ahd, scb); |
9025 | break; |
9026 | } |
9027 | } |
9028 | |
9029 | static void |
9030 | ahd_handle_scb_status(struct ahd_softc *ahd, struct scb *scb) |
9031 | { |
9032 | if (scb->hscb->shared_data.istatus.scsi_status != 0) { |
9033 | ahd_handle_scsi_status(ahd, scb); |
9034 | } else { |
9035 | ahd_calc_residual(ahd, scb); |
9036 | ahd_done(ahd, scb); |
9037 | } |
9038 | } |
9039 | |
9040 | /* |
9041 | * Calculate the residual for a just completed SCB. |
9042 | */ |
9043 | static void |
9044 | ahd_calc_residual(struct ahd_softc *ahd, struct scb *scb) |
9045 | { |
9046 | struct hardware_scb *hscb; |
9047 | struct initiator_status *spkt; |
9048 | uint32_t sgptr; |
9049 | uint32_t resid_sgptr; |
9050 | uint32_t resid; |
9051 | |
9052 | /* |
9053 | * 5 cases. |
9054 | * 1) No residual. |
9055 | * SG_STATUS_VALID clear in sgptr. |
9056 | * 2) Transferless command |
9057 | * 3) Never performed any transfers. |
9058 | * sgptr has SG_FULL_RESID set. |
9059 | * 4) No residual but target did not |
9060 | * save data pointers after the |
9061 | * last transfer, so sgptr was |
9062 | * never updated. |
9063 | * 5) We have a partial residual. |
9064 | * Use residual_sgptr to determine |
9065 | * where we are. |
9066 | */ |
9067 | |
9068 | hscb = scb->hscb; |
9069 | sgptr = ahd_le32toh(hscb->sgptr); |
9070 | if ((sgptr & SG_STATUS_VALID) == 0) |
9071 | /* Case 1 */ |
9072 | return; |
9073 | sgptr &= ~SG_STATUS_VALID; |
9074 | |
9075 | if ((sgptr & SG_LIST_NULL) != 0) |
9076 | /* Case 2 */ |
9077 | return; |
9078 | |
9079 | /* |
9080 | * Residual fields are the same in both |
9081 | * target and initiator status packets, |
9082 | * so we can always use the initiator fields |
9083 | * regardless of the role for this SCB. |
9084 | */ |
9085 | spkt = &hscb->shared_data.istatus; |
9086 | resid_sgptr = ahd_le32toh(spkt->residual_sgptr); |
9087 | if ((sgptr & SG_FULL_RESID) != 0) { |
9088 | /* Case 3 */ |
9089 | resid = ahd_get_transfer_length(scb); |
9090 | } else if ((resid_sgptr & SG_LIST_NULL) != 0) { |
9091 | /* Case 4 */ |
9092 | return; |
9093 | } else if ((resid_sgptr & SG_OVERRUN_RESID) != 0) { |
9094 | ahd_print_path(ahd, scb); |
9095 | printk("data overrun detected Tag == 0x%x.\n" , |
9096 | SCB_GET_TAG(scb)); |
9097 | ahd_freeze_devq(ahd, scb); |
9098 | ahd_set_transaction_status(scb, status: CAM_DATA_RUN_ERR); |
9099 | ahd_freeze_scb(scb); |
9100 | return; |
9101 | } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) { |
9102 | panic(fmt: "Bogus resid sgptr value 0x%x\n" , resid_sgptr); |
9103 | /* NOTREACHED */ |
9104 | } else { |
9105 | struct ahd_dma_seg *sg; |
9106 | |
9107 | /* |
9108 | * Remainder of the SG where the transfer |
9109 | * stopped. |
9110 | */ |
9111 | resid = ahd_le32toh(spkt->residual_datacnt) & AHD_SG_LEN_MASK; |
9112 | sg = ahd_sg_bus_to_virt(ahd, scb, sg_busaddr: resid_sgptr & SG_PTR_MASK); |
9113 | |
9114 | /* The residual sg_ptr always points to the next sg */ |
9115 | sg--; |
9116 | |
9117 | /* |
9118 | * Add up the contents of all residual |
9119 | * SG segments that are after the SG where |
9120 | * the transfer stopped. |
9121 | */ |
9122 | while ((ahd_le32toh(sg->len) & AHD_DMA_LAST_SEG) == 0) { |
9123 | sg++; |
9124 | resid += ahd_le32toh(sg->len) & AHD_SG_LEN_MASK; |
9125 | } |
9126 | } |
9127 | if ((scb->flags & SCB_SENSE) == 0) |
9128 | ahd_set_residual(scb, resid); |
9129 | else |
9130 | ahd_set_sense_residual(scb, resid); |
9131 | |
9132 | #ifdef AHD_DEBUG |
9133 | if ((ahd_debug & AHD_SHOW_MISC) != 0) { |
9134 | ahd_print_path(ahd, scb); |
9135 | printk("Handled %sResidual of %d bytes\n" , |
9136 | (scb->flags & SCB_SENSE) ? "Sense " : "" , resid); |
9137 | } |
9138 | #endif |
9139 | } |
9140 | |
9141 | /******************************* Target Mode **********************************/ |
9142 | #ifdef AHD_TARGET_MODE |
9143 | /* |
9144 | * Add a target mode event to this lun's queue |
9145 | */ |
9146 | static void |
9147 | ahd_queue_lstate_event(struct ahd_softc *ahd, struct ahd_tmode_lstate *lstate, |
9148 | u_int initiator_id, u_int event_type, u_int event_arg) |
9149 | { |
9150 | struct ahd_tmode_event *event; |
9151 | int pending; |
9152 | |
9153 | xpt_freeze_devq(lstate->path, /*count*/1); |
9154 | if (lstate->event_w_idx >= lstate->event_r_idx) |
9155 | pending = lstate->event_w_idx - lstate->event_r_idx; |
9156 | else |
9157 | pending = AHD_TMODE_EVENT_BUFFER_SIZE + 1 |
9158 | - (lstate->event_r_idx - lstate->event_w_idx); |
9159 | |
9160 | if (event_type == EVENT_TYPE_BUS_RESET |
9161 | || event_type == TARGET_RESET) { |
9162 | /* |
9163 | * Any earlier events are irrelevant, so reset our buffer. |
9164 | * This has the effect of allowing us to deal with reset |
9165 | * floods (an external device holding down the reset line) |
9166 | * without losing the event that is really interesting. |
9167 | */ |
9168 | lstate->event_r_idx = 0; |
9169 | lstate->event_w_idx = 0; |
9170 | xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE); |
9171 | } |
9172 | |
9173 | if (pending == AHD_TMODE_EVENT_BUFFER_SIZE) { |
9174 | xpt_print_path(lstate->path); |
9175 | printk("immediate event %x:%x lost\n" , |
9176 | lstate->event_buffer[lstate->event_r_idx].event_type, |
9177 | lstate->event_buffer[lstate->event_r_idx].event_arg); |
9178 | lstate->event_r_idx++; |
9179 | if (lstate->event_r_idx == AHD_TMODE_EVENT_BUFFER_SIZE) |
9180 | lstate->event_r_idx = 0; |
9181 | xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE); |
9182 | } |
9183 | |
9184 | event = &lstate->event_buffer[lstate->event_w_idx]; |
9185 | event->initiator_id = initiator_id; |
9186 | event->event_type = event_type; |
9187 | event->event_arg = event_arg; |
9188 | lstate->event_w_idx++; |
9189 | if (lstate->event_w_idx == AHD_TMODE_EVENT_BUFFER_SIZE) |
9190 | lstate->event_w_idx = 0; |
9191 | } |
9192 | |
9193 | /* |
9194 | * Send any target mode events queued up waiting |
9195 | * for immediate notify resources. |
9196 | */ |
9197 | void |
9198 | ahd_send_lstate_events(struct ahd_softc *ahd, struct ahd_tmode_lstate *lstate) |
9199 | { |
9200 | struct ccb_hdr *ccbh; |
9201 | struct ccb_immed_notify *inot; |
9202 | |
9203 | while (lstate->event_r_idx != lstate->event_w_idx |
9204 | && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) { |
9205 | struct ahd_tmode_event *event; |
9206 | |
9207 | event = &lstate->event_buffer[lstate->event_r_idx]; |
9208 | SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); |
9209 | inot = (struct ccb_immed_notify *)ccbh; |
9210 | switch (event->event_type) { |
9211 | case EVENT_TYPE_BUS_RESET: |
9212 | ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN; |
9213 | break; |
9214 | default: |
9215 | ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN; |
9216 | inot->message_args[0] = event->event_type; |
9217 | inot->message_args[1] = event->event_arg; |
9218 | break; |
9219 | } |
9220 | inot->initiator_id = event->initiator_id; |
9221 | inot->sense_len = 0; |
9222 | xpt_done((union ccb *)inot); |
9223 | lstate->event_r_idx++; |
9224 | if (lstate->event_r_idx == AHD_TMODE_EVENT_BUFFER_SIZE) |
9225 | lstate->event_r_idx = 0; |
9226 | } |
9227 | } |
9228 | #endif |
9229 | |
9230 | /******************** Sequencer Program Patching/Download *********************/ |
9231 | |
9232 | #ifdef AHD_DUMP_SEQ |
9233 | void |
9234 | ahd_dumpseq(struct ahd_softc* ahd) |
9235 | { |
9236 | int i; |
9237 | int max_prog; |
9238 | |
9239 | max_prog = 2048; |
9240 | |
9241 | ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); |
9242 | ahd_outw(ahd, PRGMCNT, 0); |
9243 | for (i = 0; i < max_prog; i++) { |
9244 | uint8_t ins_bytes[4]; |
9245 | |
9246 | ahd_insb(ahd, SEQRAM, ins_bytes, 4); |
9247 | printk("0x%08x\n" , ins_bytes[0] << 24 |
9248 | | ins_bytes[1] << 16 |
9249 | | ins_bytes[2] << 8 |
9250 | | ins_bytes[3]); |
9251 | } |
9252 | } |
9253 | #endif |
9254 | |
9255 | static void |
9256 | ahd_loadseq(struct ahd_softc *ahd) |
9257 | { |
9258 | struct cs cs_table[NUM_CRITICAL_SECTIONS]; |
9259 | u_int begin_set[NUM_CRITICAL_SECTIONS]; |
9260 | u_int end_set[NUM_CRITICAL_SECTIONS]; |
9261 | const struct patch *cur_patch; |
9262 | u_int cs_count; |
9263 | u_int cur_cs; |
9264 | u_int i; |
9265 | int downloaded; |
9266 | u_int skip_addr; |
9267 | u_int sg_prefetch_cnt; |
9268 | u_int sg_prefetch_cnt_limit; |
9269 | u_int sg_prefetch_align; |
9270 | u_int sg_size; |
9271 | u_int cacheline_mask; |
9272 | uint8_t download_consts[DOWNLOAD_CONST_COUNT]; |
9273 | |
9274 | if (bootverbose) |
9275 | printk("%s: Downloading Sequencer Program..." , |
9276 | ahd_name(ahd)); |
9277 | |
9278 | #if DOWNLOAD_CONST_COUNT != 8 |
9279 | #error "Download Const Mismatch" |
9280 | #endif |
9281 | /* |
9282 | * Start out with 0 critical sections |
9283 | * that apply to this firmware load. |
9284 | */ |
9285 | cs_count = 0; |
9286 | cur_cs = 0; |
9287 | memset(begin_set, 0, sizeof(begin_set)); |
9288 | memset(end_set, 0, sizeof(end_set)); |
9289 | |
9290 | /* |
9291 | * Setup downloadable constant table. |
9292 | * |
9293 | * The computation for the S/G prefetch variables is |
9294 | * a bit complicated. We would like to always fetch |
9295 | * in terms of cachelined sized increments. However, |
9296 | * if the cacheline is not an even multiple of the |
9297 | * SG element size or is larger than our SG RAM, using |
9298 | * just the cache size might leave us with only a portion |
9299 | * of an SG element at the tail of a prefetch. If the |
9300 | * cacheline is larger than our S/G prefetch buffer less |
9301 | * the size of an SG element, we may round down to a cacheline |
9302 | * that doesn't contain any or all of the S/G of interest |
9303 | * within the bounds of our S/G ram. Provide variables to |
9304 | * the sequencer that will allow it to handle these edge |
9305 | * cases. |
9306 | */ |
9307 | /* Start by aligning to the nearest cacheline. */ |
9308 | sg_prefetch_align = ahd->pci_cachesize; |
9309 | if (sg_prefetch_align == 0) |
9310 | sg_prefetch_align = 8; |
9311 | /* Round down to the nearest power of 2. */ |
9312 | while (powerof2(sg_prefetch_align) == 0) |
9313 | sg_prefetch_align--; |
9314 | |
9315 | cacheline_mask = sg_prefetch_align - 1; |
9316 | |
9317 | /* |
9318 | * If the cacheline boundary is greater than half our prefetch RAM |
9319 | * we risk not being able to fetch even a single complete S/G |
9320 | * segment if we align to that boundary. |
9321 | */ |
9322 | if (sg_prefetch_align > CCSGADDR_MAX/2) |
9323 | sg_prefetch_align = CCSGADDR_MAX/2; |
9324 | /* Start by fetching a single cacheline. */ |
9325 | sg_prefetch_cnt = sg_prefetch_align; |
9326 | /* |
9327 | * Increment the prefetch count by cachelines until |
9328 | * at least one S/G element will fit. |
9329 | */ |
9330 | sg_size = sizeof(struct ahd_dma_seg); |
9331 | if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) |
9332 | sg_size = sizeof(struct ahd_dma64_seg); |
9333 | while (sg_prefetch_cnt < sg_size) |
9334 | sg_prefetch_cnt += sg_prefetch_align; |
9335 | /* |
9336 | * If the cacheline is not an even multiple of |
9337 | * the S/G size, we may only get a partial S/G when |
9338 | * we align. Add a cacheline if this is the case. |
9339 | */ |
9340 | if ((sg_prefetch_align % sg_size) != 0 |
9341 | && (sg_prefetch_cnt < CCSGADDR_MAX)) |
9342 | sg_prefetch_cnt += sg_prefetch_align; |
9343 | /* |
9344 | * Lastly, compute a value that the sequencer can use |
9345 | * to determine if the remainder of the CCSGRAM buffer |
9346 | * has a full S/G element in it. |
9347 | */ |
9348 | sg_prefetch_cnt_limit = -(sg_prefetch_cnt - sg_size + 1); |
9349 | download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt; |
9350 | download_consts[SG_PREFETCH_CNT_LIMIT] = sg_prefetch_cnt_limit; |
9351 | download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_align - 1); |
9352 | download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_align - 1); |
9353 | download_consts[SG_SIZEOF] = sg_size; |
9354 | download_consts[PKT_OVERRUN_BUFOFFSET] = |
9355 | (ahd->overrun_buf - (uint8_t *)ahd->qoutfifo) / 256; |
9356 | download_consts[SCB_TRANSFER_SIZE] = SCB_TRANSFER_SIZE_1BYTE_LUN; |
9357 | download_consts[CACHELINE_MASK] = cacheline_mask; |
9358 | cur_patch = patches; |
9359 | downloaded = 0; |
9360 | skip_addr = 0; |
9361 | ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); |
9362 | ahd_outw(ahd, PRGMCNT, 0); |
9363 | |
9364 | for (i = 0; i < sizeof(seqprog)/4; i++) { |
9365 | if (ahd_check_patch(ahd, &cur_patch, i, &skip_addr) == 0) { |
9366 | /* |
9367 | * Don't download this instruction as it |
9368 | * is in a patch that was removed. |
9369 | */ |
9370 | continue; |
9371 | } |
9372 | /* |
9373 | * Move through the CS table until we find a CS |
9374 | * that might apply to this instruction. |
9375 | */ |
9376 | for (; cur_cs < NUM_CRITICAL_SECTIONS; cur_cs++) { |
9377 | if (critical_sections[cur_cs].end <= i) { |
9378 | if (begin_set[cs_count] == TRUE |
9379 | && end_set[cs_count] == FALSE) { |
9380 | cs_table[cs_count].end = downloaded; |
9381 | end_set[cs_count] = TRUE; |
9382 | cs_count++; |
9383 | } |
9384 | continue; |
9385 | } |
9386 | if (critical_sections[cur_cs].begin <= i |
9387 | && begin_set[cs_count] == FALSE) { |
9388 | cs_table[cs_count].begin = downloaded; |
9389 | begin_set[cs_count] = TRUE; |
9390 | } |
9391 | break; |
9392 | } |
9393 | ahd_download_instr(ahd, i, download_consts); |
9394 | downloaded++; |
9395 | } |
9396 | |
9397 | ahd->num_critical_sections = cs_count; |
9398 | if (cs_count != 0) { |
9399 | |
9400 | cs_count *= sizeof(struct cs); |
9401 | ahd->critical_sections = kmemdup(cs_table, cs_count, GFP_ATOMIC); |
9402 | if (ahd->critical_sections == NULL) |
9403 | panic(fmt: "ahd_loadseq: Could not malloc" ); |
9404 | } |
9405 | ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE); |
9406 | |
9407 | if (bootverbose) { |
9408 | printk(" %d instructions downloaded\n" , downloaded); |
9409 | printk("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n" , |
9410 | ahd_name(ahd), ahd->features, ahd->bugs, ahd->flags); |
9411 | } |
9412 | } |
9413 | |
9414 | static int |
9415 | ahd_check_patch(struct ahd_softc *ahd, const struct patch **start_patch, |
9416 | u_int start_instr, u_int *skip_addr) |
9417 | { |
9418 | const struct patch *cur_patch; |
9419 | const struct patch *last_patch; |
9420 | u_int num_patches; |
9421 | |
9422 | num_patches = ARRAY_SIZE(patches); |
9423 | last_patch = &patches[num_patches]; |
9424 | cur_patch = *start_patch; |
9425 | |
9426 | while (cur_patch < last_patch && start_instr == cur_patch->begin) { |
9427 | |
9428 | if (cur_patch->patch_func(ahd) == 0) { |
9429 | |
9430 | /* Start rejecting code */ |
9431 | *skip_addr = start_instr + cur_patch->skip_instr; |
9432 | cur_patch += cur_patch->skip_patch; |
9433 | } else { |
9434 | /* Accepted this patch. Advance to the next |
9435 | * one and wait for our intruction pointer to |
9436 | * hit this point. |
9437 | */ |
9438 | cur_patch++; |
9439 | } |
9440 | } |
9441 | |
9442 | *start_patch = cur_patch; |
9443 | if (start_instr < *skip_addr) |
9444 | /* Still skipping */ |
9445 | return (0); |
9446 | |
9447 | return (1); |
9448 | } |
9449 | |
9450 | static u_int |
9451 | ahd_resolve_seqaddr(struct ahd_softc *ahd, u_int address) |
9452 | { |
9453 | const struct patch *cur_patch; |
9454 | int address_offset; |
9455 | u_int skip_addr; |
9456 | u_int i; |
9457 | |
9458 | address_offset = 0; |
9459 | cur_patch = patches; |
9460 | skip_addr = 0; |
9461 | |
9462 | for (i = 0; i < address;) { |
9463 | |
9464 | ahd_check_patch(ahd, start_patch: &cur_patch, start_instr: i, skip_addr: &skip_addr); |
9465 | |
9466 | if (skip_addr > i) { |
9467 | int end_addr; |
9468 | |
9469 | end_addr = min(address, skip_addr); |
9470 | address_offset += end_addr - i; |
9471 | i = skip_addr; |
9472 | } else { |
9473 | i++; |
9474 | } |
9475 | } |
9476 | return (address - address_offset); |
9477 | } |
9478 | |
9479 | static void |
9480 | ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts) |
9481 | { |
9482 | union ins_formats instr; |
9483 | struct ins_format1 *fmt1_ins; |
9484 | struct ins_format3 *fmt3_ins; |
9485 | u_int opcode; |
9486 | |
9487 | /* |
9488 | * The firmware is always compiled into a little endian format. |
9489 | */ |
9490 | instr.integer = ahd_le32toh(*(uint32_t*)&seqprog[instrptr * 4]); |
9491 | |
9492 | fmt1_ins = &instr.format1; |
9493 | fmt3_ins = NULL; |
9494 | |
9495 | /* Pull the opcode */ |
9496 | opcode = instr.format1.opcode; |
9497 | switch (opcode) { |
9498 | case AIC_OP_JMP: |
9499 | case AIC_OP_JC: |
9500 | case AIC_OP_JNC: |
9501 | case AIC_OP_CALL: |
9502 | case AIC_OP_JNE: |
9503 | case AIC_OP_JNZ: |
9504 | case AIC_OP_JE: |
9505 | case AIC_OP_JZ: |
9506 | { |
9507 | fmt3_ins = &instr.format3; |
9508 | fmt3_ins->address = ahd_resolve_seqaddr(ahd, address: fmt3_ins->address); |
9509 | } |
9510 | fallthrough; |
9511 | case AIC_OP_OR: |
9512 | case AIC_OP_AND: |
9513 | case AIC_OP_XOR: |
9514 | case AIC_OP_ADD: |
9515 | case AIC_OP_ADC: |
9516 | case AIC_OP_BMOV: |
9517 | if (fmt1_ins->parity != 0) { |
9518 | fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; |
9519 | } |
9520 | fmt1_ins->parity = 0; |
9521 | fallthrough; |
9522 | case AIC_OP_ROL: |
9523 | { |
9524 | int i, count; |
9525 | |
9526 | /* Calculate odd parity for the instruction */ |
9527 | for (i = 0, count = 0; i < 31; i++) { |
9528 | uint32_t mask; |
9529 | |
9530 | mask = 0x01 << i; |
9531 | if ((instr.integer & mask) != 0) |
9532 | count++; |
9533 | } |
9534 | if ((count & 0x01) == 0) |
9535 | instr.format1.parity = 1; |
9536 | |
9537 | /* The sequencer is a little endian cpu */ |
9538 | instr.integer = ahd_htole32(instr.integer); |
9539 | ahd_outsb(ahd, SEQRAM, instr.bytes, 4); |
9540 | break; |
9541 | } |
9542 | default: |
9543 | panic(fmt: "Unknown opcode encountered in seq program" ); |
9544 | break; |
9545 | } |
9546 | } |
9547 | |
9548 | static int |
9549 | ahd_probe_stack_size(struct ahd_softc *ahd) |
9550 | { |
9551 | int last_probe; |
9552 | |
9553 | last_probe = 0; |
9554 | while (1) { |
9555 | int i; |
9556 | |
9557 | /* |
9558 | * We avoid using 0 as a pattern to avoid |
9559 | * confusion if the stack implementation |
9560 | * "back-fills" with zeros when "poping' |
9561 | * entries. |
9562 | */ |
9563 | for (i = 1; i <= last_probe+1; i++) { |
9564 | ahd_outb(ahd, STACK, i & 0xFF); |
9565 | ahd_outb(ahd, STACK, (i >> 8) & 0xFF); |
9566 | } |
9567 | |
9568 | /* Verify */ |
9569 | for (i = last_probe+1; i > 0; i--) { |
9570 | u_int stack_entry; |
9571 | |
9572 | stack_entry = ahd_inb(ahd, STACK) |
9573 | |(ahd_inb(ahd, STACK) << 8); |
9574 | if (stack_entry != i) |
9575 | goto sized; |
9576 | } |
9577 | last_probe++; |
9578 | } |
9579 | sized: |
9580 | return (last_probe); |
9581 | } |
9582 | |
9583 | int |
9584 | ahd_print_register(const ahd_reg_parse_entry_t *table, u_int num_entries, |
9585 | const char *name, u_int address, u_int value, |
9586 | u_int *cur_column, u_int wrap_point) |
9587 | { |
9588 | int printed; |
9589 | u_int printed_mask; |
9590 | |
9591 | if (cur_column != NULL && *cur_column >= wrap_point) { |
9592 | printk("\n" ); |
9593 | *cur_column = 0; |
9594 | } |
9595 | printed = printk("%s[0x%x]" , name, value); |
9596 | if (table == NULL) { |
9597 | printed += printk(" " ); |
9598 | *cur_column += printed; |
9599 | return (printed); |
9600 | } |
9601 | printed_mask = 0; |
9602 | while (printed_mask != 0xFF) { |
9603 | int entry; |
9604 | |
9605 | for (entry = 0; entry < num_entries; entry++) { |
9606 | if (((value & table[entry].mask) |
9607 | != table[entry].value) |
9608 | || ((printed_mask & table[entry].mask) |
9609 | == table[entry].mask)) |
9610 | continue; |
9611 | |
9612 | printed += printk("%s%s" , |
9613 | printed_mask == 0 ? ":(" : "|" , |
9614 | table[entry].name); |
9615 | printed_mask |= table[entry].mask; |
9616 | |
9617 | break; |
9618 | } |
9619 | if (entry >= num_entries) |
9620 | break; |
9621 | } |
9622 | if (printed_mask != 0) |
9623 | printed += printk(") " ); |
9624 | else |
9625 | printed += printk(" " ); |
9626 | if (cur_column != NULL) |
9627 | *cur_column += printed; |
9628 | return (printed); |
9629 | } |
9630 | |
9631 | void |
9632 | ahd_dump_card_state(struct ahd_softc *ahd) |
9633 | { |
9634 | struct scb *scb; |
9635 | ahd_mode_state saved_modes; |
9636 | u_int dffstat; |
9637 | int paused; |
9638 | u_int scb_index; |
9639 | u_int saved_scb_index; |
9640 | u_int cur_col; |
9641 | int i; |
9642 | |
9643 | if (ahd_is_paused(ahd)) { |
9644 | paused = 1; |
9645 | } else { |
9646 | paused = 0; |
9647 | ahd_pause(ahd); |
9648 | } |
9649 | saved_modes = ahd_save_modes(ahd); |
9650 | ahd_set_modes(ahd, src: AHD_MODE_SCSI, dst: AHD_MODE_SCSI); |
9651 | printk(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n" |
9652 | "%s: Dumping Card State at program address 0x%x Mode 0x%x\n" , |
9653 | ahd_name(ahd), |
9654 | ahd_inw(ahd, CURADDR), |
9655 | ahd_build_mode_state(ahd, ahd->saved_src_mode, |
9656 | ahd->saved_dst_mode)); |
9657 | if (paused) |
9658 | printk("Card was paused\n" ); |
9659 | |
9660 | if (ahd_check_cmdcmpltqueues(ahd)) |
9661 | printk("Completions are pending\n" ); |
9662 | |
9663 | /* |
9664 | * Mode independent registers. |
9665 | */ |
9666 | cur_col = 0; |
9667 | ahd_intstat_print(ahd_inb(ahd, INTSTAT), &cur_col, 50); |
9668 | ahd_seloid_print(ahd_inb(ahd, SELOID), &cur_col, 50); |
9669 | ahd_selid_print(ahd_inb(ahd, SELID), &cur_col, 50); |
9670 | ahd_hs_mailbox_print(ahd_inb(ahd, LOCAL_HS_MAILBOX), &cur_col, 50); |
9671 | ahd_intctl_print(ahd_inb(ahd, INTCTL), &cur_col, 50); |
9672 | ahd_seqintstat_print(ahd_inb(ahd, SEQINTSTAT), &cur_col, 50); |
9673 | ahd_saved_mode_print(ahd_inb(ahd, SAVED_MODE), &cur_col, 50); |
9674 | ahd_dffstat_print(ahd_inb(ahd, DFFSTAT), &cur_col, 50); |
9675 | ahd_scsisigi_print(ahd_inb(ahd, SCSISIGI), &cur_col, 50); |
9676 | ahd_scsiphase_print(ahd_inb(ahd, SCSIPHASE), &cur_col, 50); |
9677 | ahd_scsibus_print(ahd_inb(ahd, SCSIBUS), &cur_col, 50); |
9678 | ahd_lastphase_print(ahd_inb(ahd, LASTPHASE), &cur_col, 50); |
9679 | ahd_scsiseq0_print(ahd_inb(ahd, SCSISEQ0), &cur_col, 50); |
9680 | ahd_scsiseq1_print(ahd_inb(ahd, SCSISEQ1), &cur_col, 50); |
9681 | ahd_seqctl0_print(ahd_inb(ahd, SEQCTL0), &cur_col, 50); |
9682 | ahd_seqintctl_print(ahd_inb(ahd, SEQINTCTL), &cur_col, 50); |
9683 | ahd_seq_flags_print(ahd_inb(ahd, SEQ_FLAGS), &cur_col, 50); |
9684 | ahd_seq_flags2_print(ahd_inb(ahd, SEQ_FLAGS2), &cur_col, 50); |
9685 | ahd_qfreeze_count_print(ahd_inw(ahd, QFREEZE_COUNT), &cur_col, 50); |
9686 | ahd_kernel_qfreeze_count_print(ahd_inw(ahd, KERNEL_QFREEZE_COUNT), |
9687 | &cur_col, 50); |
9688 | ahd_mk_message_scb_print(ahd_inw(ahd, MK_MESSAGE_SCB), &cur_col, 50); |
9689 | ahd_mk_message_scsiid_print(ahd_inb(ahd, MK_MESSAGE_SCSIID), |
9690 | &cur_col, 50); |
9691 | ahd_sstat0_print(ahd_inb(ahd, SSTAT0), &cur_col, 50); |
9692 | ahd_sstat1_print(ahd_inb(ahd, SSTAT1), &cur_col, 50); |
9693 | ahd_sstat2_print(ahd_inb(ahd, SSTAT2), &cur_col, 50); |
9694 | ahd_sstat3_print(ahd_inb(ahd, SSTAT3), &cur_col, 50); |
9695 | ahd_perrdiag_print(ahd_inb(ahd, PERRDIAG), &cur_col, 50); |
9696 | ahd_simode1_print(ahd_inb(ahd, SIMODE1), &cur_col, 50); |
9697 | ahd_lqistat0_print(ahd_inb(ahd, LQISTAT0), &cur_col, 50); |
9698 | ahd_lqistat1_print(ahd_inb(ahd, LQISTAT1), &cur_col, 50); |
9699 | ahd_lqistat2_print(ahd_inb(ahd, LQISTAT2), &cur_col, 50); |
9700 | ahd_lqostat0_print(ahd_inb(ahd, LQOSTAT0), &cur_col, 50); |
9701 | ahd_lqostat1_print(ahd_inb(ahd, LQOSTAT1), &cur_col, 50); |
9702 | ahd_lqostat2_print(ahd_inb(ahd, LQOSTAT2), &cur_col, 50); |
9703 | printk("\n" ); |
9704 | printk("\nSCB Count = %d CMDS_PENDING = %d LASTSCB 0x%x " |
9705 | "CURRSCB 0x%x NEXTSCB 0x%x\n" , |
9706 | ahd->scb_data.numscbs, ahd_inw(ahd, CMDS_PENDING), |
9707 | ahd_inw(ahd, LASTSCB), ahd_inw(ahd, CURRSCB), |
9708 | ahd_inw(ahd, NEXTSCB)); |
9709 | cur_col = 0; |
9710 | /* QINFIFO */ |
9711 | ahd_search_qinfifo(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, |
9712 | CAM_LUN_WILDCARD, SCB_LIST_NULL, |
9713 | role: ROLE_UNKNOWN, /*status*/0, action: SEARCH_PRINT); |
9714 | saved_scb_index = ahd_get_scbptr(ahd); |
9715 | printk("Pending list:" ); |
9716 | i = 0; |
9717 | LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) { |
9718 | if (i++ > AHD_SCB_MAX) |
9719 | break; |
9720 | cur_col = printk("\n%3d FIFO_USE[0x%x] " , SCB_GET_TAG(scb), |
9721 | ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT)); |
9722 | ahd_set_scbptr(ahd, SCB_GET_TAG(scb)); |
9723 | ahd_scb_control_print(ahd_inb_scbram(ahd, SCB_CONTROL), |
9724 | &cur_col, 60); |
9725 | ahd_scb_scsiid_print(ahd_inb_scbram(ahd, SCB_SCSIID), |
9726 | &cur_col, 60); |
9727 | } |
9728 | printk("\nTotal %d\n" , i); |
9729 | |
9730 | printk("Kernel Free SCB list: " ); |
9731 | i = 0; |
9732 | TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) { |
9733 | struct scb *list_scb; |
9734 | |
9735 | list_scb = scb; |
9736 | do { |
9737 | printk("%d " , SCB_GET_TAG(list_scb)); |
9738 | list_scb = LIST_NEXT(list_scb, collision_links); |
9739 | } while (list_scb && i++ < AHD_SCB_MAX); |
9740 | } |
9741 | |
9742 | LIST_FOREACH(scb, &ahd->scb_data.any_dev_free_scb_list, links.le) { |
9743 | if (i++ > AHD_SCB_MAX) |
9744 | break; |
9745 | printk("%d " , SCB_GET_TAG(scb)); |
9746 | } |
9747 | printk("\n" ); |
9748 | |
9749 | printk("Sequencer Complete DMA-inprog list: " ); |
9750 | scb_index = ahd_inw(ahd, COMPLETE_SCB_DMAINPROG_HEAD); |
9751 | i = 0; |
9752 | while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) { |
9753 | ahd_set_scbptr(ahd, scbptr: scb_index); |
9754 | printk("%d " , scb_index); |
9755 | scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
9756 | } |
9757 | printk("\n" ); |
9758 | |
9759 | printk("Sequencer Complete list: " ); |
9760 | scb_index = ahd_inw(ahd, COMPLETE_SCB_HEAD); |
9761 | i = 0; |
9762 | while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) { |
9763 | ahd_set_scbptr(ahd, scbptr: scb_index); |
9764 | printk("%d " , scb_index); |
9765 | scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
9766 | } |
9767 | printk("\n" ); |
9768 | |
9769 | printk("Sequencer DMA-Up and Complete list: " ); |
9770 | scb_index = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD); |
9771 | i = 0; |
9772 | while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) { |
9773 | ahd_set_scbptr(ahd, scbptr: scb_index); |
9774 | printk("%d " , scb_index); |
9775 | scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
9776 | } |
9777 | printk("\n" ); |
9778 | printk("Sequencer On QFreeze and Complete list: " ); |
9779 | scb_index = ahd_inw(ahd, COMPLETE_ON_QFREEZE_HEAD); |
9780 | i = 0; |
9781 | while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) { |
9782 | ahd_set_scbptr(ahd, scbptr: scb_index); |
9783 | printk("%d " , scb_index); |
9784 | scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE); |
9785 | } |
9786 | printk("\n" ); |
9787 | ahd_set_scbptr(ahd, scbptr: saved_scb_index); |
9788 | dffstat = ahd_inb(ahd, DFFSTAT); |
9789 | for (i = 0; i < 2; i++) { |
9790 | #ifdef AHD_DEBUG |
9791 | struct scb *fifo_scb; |
9792 | #endif |
9793 | u_int fifo_scbptr; |
9794 | |
9795 | ahd_set_modes(ahd, src: AHD_MODE_DFF0 + i, dst: AHD_MODE_DFF0 + i); |
9796 | fifo_scbptr = ahd_get_scbptr(ahd); |
9797 | printk("\n\n%s: FIFO%d %s, LONGJMP == 0x%x, SCB 0x%x\n" , |
9798 | ahd_name(ahd), i, |
9799 | (dffstat & (FIFO0FREE << i)) ? "Free" : "Active" , |
9800 | ahd_inw(ahd, LONGJMP_ADDR), fifo_scbptr); |
9801 | cur_col = 0; |
9802 | ahd_seqimode_print(ahd_inb(ahd, SEQIMODE), &cur_col, 50); |
9803 | ahd_seqintsrc_print(ahd_inb(ahd, SEQINTSRC), &cur_col, 50); |
9804 | ahd_dfcntrl_print(ahd_inb(ahd, DFCNTRL), &cur_col, 50); |
9805 | ahd_dfstatus_print(ahd_inb(ahd, DFSTATUS), &cur_col, 50); |
9806 | ahd_sg_cache_shadow_print(ahd_inb(ahd, SG_CACHE_SHADOW), |
9807 | &cur_col, 50); |
9808 | ahd_sg_state_print(ahd_inb(ahd, SG_STATE), &cur_col, 50); |
9809 | ahd_dffsxfrctl_print(ahd_inb(ahd, DFFSXFRCTL), &cur_col, 50); |
9810 | ahd_soffcnt_print(ahd_inb(ahd, SOFFCNT), &cur_col, 50); |
9811 | ahd_mdffstat_print(ahd_inb(ahd, MDFFSTAT), &cur_col, 50); |
9812 | if (cur_col > 50) { |
9813 | printk("\n" ); |
9814 | cur_col = 0; |
9815 | } |
9816 | cur_col += printk("SHADDR = 0x%x%x, SHCNT = 0x%x " , |
9817 | ahd_inl(ahd, SHADDR+4), |
9818 | ahd_inl(ahd, SHADDR), |
9819 | (ahd_inb(ahd, SHCNT) |
9820 | | (ahd_inb(ahd, SHCNT + 1) << 8) |
9821 | | (ahd_inb(ahd, SHCNT + 2) << 16))); |
9822 | if (cur_col > 50) { |
9823 | printk("\n" ); |
9824 | cur_col = 0; |
9825 | } |
9826 | cur_col += printk("HADDR = 0x%x%x, HCNT = 0x%x " , |
9827 | ahd_inl(ahd, HADDR+4), |
9828 | ahd_inl(ahd, HADDR), |
9829 | (ahd_inb(ahd, HCNT) |
9830 | | (ahd_inb(ahd, HCNT + 1) << 8) |
9831 | | (ahd_inb(ahd, HCNT + 2) << 16))); |
9832 | ahd_ccsgctl_print(ahd_inb(ahd, CCSGCTL), &cur_col, 50); |
9833 | #ifdef AHD_DEBUG |
9834 | if ((ahd_debug & AHD_SHOW_SG) != 0) { |
9835 | fifo_scb = ahd_lookup_scb(ahd, tag: fifo_scbptr); |
9836 | if (fifo_scb != NULL) |
9837 | ahd_dump_sglist(scb: fifo_scb); |
9838 | } |
9839 | #endif |
9840 | } |
9841 | printk("\nLQIN: " ); |
9842 | for (i = 0; i < 20; i++) |
9843 | printk("0x%x " , ahd_inb(ahd, LQIN + i)); |
9844 | printk("\n" ); |
9845 | ahd_set_modes(ahd, src: AHD_MODE_CFG, dst: AHD_MODE_CFG); |
9846 | printk("%s: LQISTATE = 0x%x, LQOSTATE = 0x%x, OPTIONMODE = 0x%x\n" , |
9847 | ahd_name(ahd), ahd_inb(ahd, LQISTATE), ahd_inb(ahd, LQOSTATE), |
9848 | ahd_inb(ahd, OPTIONMODE)); |
9849 | printk("%s: OS_SPACE_CNT = 0x%x MAXCMDCNT = 0x%x\n" , |
9850 | ahd_name(ahd), ahd_inb(ahd, OS_SPACE_CNT), |
9851 | ahd_inb(ahd, MAXCMDCNT)); |
9852 | printk("%s: SAVED_SCSIID = 0x%x SAVED_LUN = 0x%x\n" , |
9853 | ahd_name(ahd), ahd_inb(ahd, SAVED_SCSIID), |
9854 | ahd_inb(ahd, SAVED_LUN)); |
9855 | ahd_simode0_print(ahd_inb(ahd, SIMODE0), &cur_col, 50); |
9856 | printk("\n" ); |
9857 | ahd_set_modes(ahd, src: AHD_MODE_CCHAN, dst: AHD_MODE_CCHAN); |
9858 | cur_col = 0; |
9859 | ahd_ccscbctl_print(ahd_inb(ahd, CCSCBCTL), &cur_col, 50); |
9860 | printk("\n" ); |
9861 | ahd_set_modes(ahd, src: ahd->saved_src_mode, dst: ahd->saved_dst_mode); |
9862 | printk("%s: REG0 == 0x%x, SINDEX = 0x%x, DINDEX = 0x%x\n" , |
9863 | ahd_name(ahd), ahd_inw(ahd, REG0), ahd_inw(ahd, SINDEX), |
9864 | ahd_inw(ahd, DINDEX)); |
9865 | printk("%s: SCBPTR == 0x%x, SCB_NEXT == 0x%x, SCB_NEXT2 == 0x%x\n" , |
9866 | ahd_name(ahd), ahd_get_scbptr(ahd), |
9867 | ahd_inw_scbram(ahd, SCB_NEXT), |
9868 | ahd_inw_scbram(ahd, SCB_NEXT2)); |
9869 | printk("CDB %x %x %x %x %x %x\n" , |
9870 | ahd_inb_scbram(ahd, SCB_CDB_STORE), |
9871 | ahd_inb_scbram(ahd, SCB_CDB_STORE+1), |
9872 | ahd_inb_scbram(ahd, SCB_CDB_STORE+2), |
9873 | ahd_inb_scbram(ahd, SCB_CDB_STORE+3), |
9874 | ahd_inb_scbram(ahd, SCB_CDB_STORE+4), |
9875 | ahd_inb_scbram(ahd, SCB_CDB_STORE+5)); |
9876 | printk("STACK:" ); |
9877 | for (i = 0; i < ahd->stack_size; i++) { |
9878 | ahd->saved_stack[i] = |
9879 | ahd_inb(ahd, STACK)|(ahd_inb(ahd, STACK) << 8); |
9880 | printk(" 0x%x" , ahd->saved_stack[i]); |
9881 | } |
9882 | for (i = ahd->stack_size-1; i >= 0; i--) { |
9883 | ahd_outb(ahd, STACK, ahd->saved_stack[i] & 0xFF); |
9884 | ahd_outb(ahd, STACK, (ahd->saved_stack[i] >> 8) & 0xFF); |
9885 | } |
9886 | printk("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n" ); |
9887 | ahd_restore_modes(ahd, state: saved_modes); |
9888 | if (paused == 0) |
9889 | ahd_unpause(ahd); |
9890 | } |
9891 | |
9892 | #if 0 |
9893 | void |
9894 | ahd_dump_scbs(struct ahd_softc *ahd) |
9895 | { |
9896 | ahd_mode_state saved_modes; |
9897 | u_int saved_scb_index; |
9898 | int i; |
9899 | |
9900 | saved_modes = ahd_save_modes(ahd); |
9901 | ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); |
9902 | saved_scb_index = ahd_get_scbptr(ahd); |
9903 | for (i = 0; i < AHD_SCB_MAX; i++) { |
9904 | ahd_set_scbptr(ahd, i); |
9905 | printk("%3d" , i); |
9906 | printk("(CTRL 0x%x ID 0x%x N 0x%x N2 0x%x SG 0x%x, RSG 0x%x)\n" , |
9907 | ahd_inb_scbram(ahd, SCB_CONTROL), |
9908 | ahd_inb_scbram(ahd, SCB_SCSIID), |
9909 | ahd_inw_scbram(ahd, SCB_NEXT), |
9910 | ahd_inw_scbram(ahd, SCB_NEXT2), |
9911 | ahd_inl_scbram(ahd, SCB_SGPTR), |
9912 | ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR)); |
9913 | } |
9914 | printk("\n" ); |
9915 | ahd_set_scbptr(ahd, saved_scb_index); |
9916 | ahd_restore_modes(ahd, saved_modes); |
9917 | } |
9918 | #endif /* 0 */ |
9919 | |
9920 | /**************************** Flexport Logic **********************************/ |
9921 | /* |
9922 | * Read count 16bit words from 16bit word address start_addr from the |
9923 | * SEEPROM attached to the controller, into buf, using the controller's |
9924 | * SEEPROM reading state machine. Optionally treat the data as a byte |
9925 | * stream in terms of byte order. |
9926 | */ |
9927 | int |
9928 | ahd_read_seeprom(struct ahd_softc *ahd, uint16_t *buf, |
9929 | u_int start_addr, u_int count, int bytestream) |
9930 | { |
9931 | u_int cur_addr; |
9932 | u_int end_addr; |
9933 | int error; |
9934 | |
9935 | /* |
9936 | * If we never make it through the loop even once, |
9937 | * we were passed invalid arguments. |
9938 | */ |
9939 | error = EINVAL; |
9940 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
9941 | end_addr = start_addr + count; |
9942 | for (cur_addr = start_addr; cur_addr < end_addr; cur_addr++) { |
9943 | |
9944 | ahd_outb(ahd, SEEADR, cur_addr); |
9945 | ahd_outb(ahd, SEECTL, SEEOP_READ | SEESTART); |
9946 | |
9947 | error = ahd_wait_seeprom(ahd); |
9948 | if (error) |
9949 | break; |
9950 | if (bytestream != 0) { |
9951 | uint8_t *bytestream_ptr; |
9952 | |
9953 | bytestream_ptr = (uint8_t *)buf; |
9954 | *bytestream_ptr++ = ahd_inb(ahd, SEEDAT); |
9955 | *bytestream_ptr = ahd_inb(ahd, SEEDAT+1); |
9956 | } else { |
9957 | /* |
9958 | * ahd_inw() already handles machine byte order. |
9959 | */ |
9960 | *buf = ahd_inw(ahd, SEEDAT); |
9961 | } |
9962 | buf++; |
9963 | } |
9964 | return (error); |
9965 | } |
9966 | |
9967 | /* |
9968 | * Write count 16bit words from buf, into SEEPROM attache to the |
9969 | * controller starting at 16bit word address start_addr, using the |
9970 | * controller's SEEPROM writing state machine. |
9971 | */ |
9972 | int |
9973 | ahd_write_seeprom(struct ahd_softc *ahd, uint16_t *buf, |
9974 | u_int start_addr, u_int count) |
9975 | { |
9976 | u_int cur_addr; |
9977 | u_int end_addr; |
9978 | int error; |
9979 | int retval; |
9980 | |
9981 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
9982 | error = ENOENT; |
9983 | |
9984 | /* Place the chip into write-enable mode */ |
9985 | ahd_outb(ahd, SEEADR, SEEOP_EWEN_ADDR); |
9986 | ahd_outb(ahd, SEECTL, SEEOP_EWEN | SEESTART); |
9987 | error = ahd_wait_seeprom(ahd); |
9988 | if (error) |
9989 | return (error); |
9990 | |
9991 | /* |
9992 | * Write the data. If we don't get through the loop at |
9993 | * least once, the arguments were invalid. |
9994 | */ |
9995 | retval = EINVAL; |
9996 | end_addr = start_addr + count; |
9997 | for (cur_addr = start_addr; cur_addr < end_addr; cur_addr++) { |
9998 | ahd_outw(ahd, SEEDAT, *buf++); |
9999 | ahd_outb(ahd, SEEADR, cur_addr); |
10000 | ahd_outb(ahd, SEECTL, SEEOP_WRITE | SEESTART); |
10001 | |
10002 | retval = ahd_wait_seeprom(ahd); |
10003 | if (retval) |
10004 | break; |
10005 | } |
10006 | |
10007 | /* |
10008 | * Disable writes. |
10009 | */ |
10010 | ahd_outb(ahd, SEEADR, SEEOP_EWDS_ADDR); |
10011 | ahd_outb(ahd, SEECTL, SEEOP_EWDS | SEESTART); |
10012 | error = ahd_wait_seeprom(ahd); |
10013 | if (error) |
10014 | return (error); |
10015 | return (retval); |
10016 | } |
10017 | |
10018 | /* |
10019 | * Wait ~100us for the serial eeprom to satisfy our request. |
10020 | */ |
10021 | static int |
10022 | ahd_wait_seeprom(struct ahd_softc *ahd) |
10023 | { |
10024 | int cnt; |
10025 | |
10026 | cnt = 5000; |
10027 | while ((ahd_inb(ahd, SEESTAT) & (SEEARBACK|SEEBUSY)) != 0 && --cnt) |
10028 | ahd_delay(5); |
10029 | |
10030 | if (cnt == 0) |
10031 | return (ETIMEDOUT); |
10032 | return (0); |
10033 | } |
10034 | |
10035 | /* |
10036 | * Validate the two checksums in the per_channel |
10037 | * vital product data struct. |
10038 | */ |
10039 | static int |
10040 | ahd_verify_vpd_cksum(struct vpd_config *vpd) |
10041 | { |
10042 | int i; |
10043 | int maxaddr; |
10044 | uint32_t checksum; |
10045 | uint8_t *vpdarray; |
10046 | |
10047 | vpdarray = (uint8_t *)vpd; |
10048 | maxaddr = offsetof(struct vpd_config, vpd_checksum); |
10049 | checksum = 0; |
10050 | for (i = offsetof(struct vpd_config, resource_type); i < maxaddr; i++) |
10051 | checksum = checksum + vpdarray[i]; |
10052 | if (checksum == 0 |
10053 | || (-checksum & 0xFF) != vpd->vpd_checksum) |
10054 | return (0); |
10055 | |
10056 | checksum = 0; |
10057 | maxaddr = offsetof(struct vpd_config, checksum); |
10058 | for (i = offsetof(struct vpd_config, default_target_flags); |
10059 | i < maxaddr; i++) |
10060 | checksum = checksum + vpdarray[i]; |
10061 | if (checksum == 0 |
10062 | || (-checksum & 0xFF) != vpd->checksum) |
10063 | return (0); |
10064 | return (1); |
10065 | } |
10066 | |
10067 | int |
10068 | ahd_verify_cksum(struct seeprom_config *sc) |
10069 | { |
10070 | int i; |
10071 | int maxaddr; |
10072 | uint32_t checksum; |
10073 | uint16_t *scarray; |
10074 | |
10075 | maxaddr = (sizeof(*sc)/2) - 1; |
10076 | checksum = 0; |
10077 | scarray = (uint16_t *)sc; |
10078 | |
10079 | for (i = 0; i < maxaddr; i++) |
10080 | checksum = checksum + scarray[i]; |
10081 | if (checksum == 0 |
10082 | || (checksum & 0xFFFF) != sc->checksum) { |
10083 | return (0); |
10084 | } else { |
10085 | return (1); |
10086 | } |
10087 | } |
10088 | |
10089 | int |
10090 | ahd_acquire_seeprom(struct ahd_softc *ahd) |
10091 | { |
10092 | /* |
10093 | * We should be able to determine the SEEPROM type |
10094 | * from the flexport logic, but unfortunately not |
10095 | * all implementations have this logic and there is |
10096 | * no programatic method for determining if the logic |
10097 | * is present. |
10098 | */ |
10099 | return (1); |
10100 | #if 0 |
10101 | uint8_t seetype; |
10102 | int error; |
10103 | |
10104 | error = ahd_read_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, &seetype); |
10105 | if (error != 0 |
10106 | || ((seetype & FLX_ROMSTAT_SEECFG) == FLX_ROMSTAT_SEE_NONE)) |
10107 | return (0); |
10108 | return (1); |
10109 | #endif |
10110 | } |
10111 | |
10112 | void |
10113 | ahd_release_seeprom(struct ahd_softc *ahd) |
10114 | { |
10115 | /* Currently a no-op */ |
10116 | } |
10117 | |
10118 | /* |
10119 | * Wait at most 2 seconds for flexport arbitration to succeed. |
10120 | */ |
10121 | static int |
10122 | ahd_wait_flexport(struct ahd_softc *ahd) |
10123 | { |
10124 | int cnt; |
10125 | |
10126 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
10127 | cnt = 1000000 * 2 / 5; |
10128 | while ((ahd_inb(ahd, BRDCTL) & FLXARBACK) == 0 && --cnt) |
10129 | ahd_delay(5); |
10130 | |
10131 | if (cnt == 0) |
10132 | return (ETIMEDOUT); |
10133 | return (0); |
10134 | } |
10135 | |
10136 | int |
10137 | ahd_write_flexport(struct ahd_softc *ahd, u_int addr, u_int value) |
10138 | { |
10139 | int error; |
10140 | |
10141 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
10142 | if (addr > 7) |
10143 | panic(fmt: "ahd_write_flexport: address out of range" ); |
10144 | ahd_outb(ahd, BRDCTL, BRDEN|(addr << 3)); |
10145 | error = ahd_wait_flexport(ahd); |
10146 | if (error != 0) |
10147 | return (error); |
10148 | ahd_outb(ahd, BRDDAT, value); |
10149 | ahd_flush_device_writes(ahd); |
10150 | ahd_outb(ahd, BRDCTL, BRDSTB|BRDEN|(addr << 3)); |
10151 | ahd_flush_device_writes(ahd); |
10152 | ahd_outb(ahd, BRDCTL, BRDEN|(addr << 3)); |
10153 | ahd_flush_device_writes(ahd); |
10154 | ahd_outb(ahd, BRDCTL, 0); |
10155 | ahd_flush_device_writes(ahd); |
10156 | return (0); |
10157 | } |
10158 | |
10159 | int |
10160 | ahd_read_flexport(struct ahd_softc *ahd, u_int addr, uint8_t *value) |
10161 | { |
10162 | int error; |
10163 | |
10164 | AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK); |
10165 | if (addr > 7) |
10166 | panic(fmt: "ahd_read_flexport: address out of range" ); |
10167 | ahd_outb(ahd, BRDCTL, BRDRW|BRDEN|(addr << 3)); |
10168 | error = ahd_wait_flexport(ahd); |
10169 | if (error != 0) |
10170 | return (error); |
10171 | *value = ahd_inb(ahd, BRDDAT); |
10172 | ahd_outb(ahd, BRDCTL, 0); |
10173 | ahd_flush_device_writes(ahd); |
10174 | return (0); |
10175 | } |
10176 | |
10177 | /************************* Target Mode ****************************************/ |
10178 | #ifdef AHD_TARGET_MODE |
10179 | cam_status |
10180 | ahd_find_tmode_devs(struct ahd_softc *ahd, struct cam_sim *sim, union ccb *ccb, |
10181 | struct ahd_tmode_tstate **tstate, |
10182 | struct ahd_tmode_lstate **lstate, |
10183 | int notfound_failure) |
10184 | { |
10185 | |
10186 | if ((ahd->features & AHD_TARGETMODE) == 0) |
10187 | return (CAM_REQ_INVALID); |
10188 | |
10189 | /* |
10190 | * Handle the 'black hole' device that sucks up |
10191 | * requests to unattached luns on enabled targets. |
10192 | */ |
10193 | if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD |
10194 | && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) { |
10195 | *tstate = NULL; |
10196 | *lstate = ahd->black_hole; |
10197 | } else { |
10198 | u_int max_id; |
10199 | |
10200 | max_id = (ahd->features & AHD_WIDE) ? 16 : 8; |
10201 | if (ccb->ccb_h.target_id >= max_id) |
10202 | return (CAM_TID_INVALID); |
10203 | |
10204 | if (ccb->ccb_h.target_lun >= AHD_NUM_LUNS) |
10205 | return (CAM_LUN_INVALID); |
10206 | |
10207 | *tstate = ahd->enabled_targets[ccb->ccb_h.target_id]; |
10208 | *lstate = NULL; |
10209 | if (*tstate != NULL) |
10210 | *lstate = |
10211 | (*tstate)->enabled_luns[ccb->ccb_h.target_lun]; |
10212 | } |
10213 | |
10214 | if (notfound_failure != 0 && *lstate == NULL) |
10215 | return (CAM_PATH_INVALID); |
10216 | |
10217 | return (CAM_REQ_CMP); |
10218 | } |
10219 | |
10220 | void |
10221 | ahd_handle_en_lun(struct ahd_softc *ahd, struct cam_sim *sim, union ccb *ccb) |
10222 | { |
10223 | #if NOT_YET |
10224 | struct ahd_tmode_tstate *tstate; |
10225 | struct ahd_tmode_lstate *lstate; |
10226 | struct ccb_en_lun *cel; |
10227 | cam_status status; |
10228 | u_int target; |
10229 | u_int lun; |
10230 | u_int target_mask; |
10231 | u_long s; |
10232 | char channel; |
10233 | |
10234 | status = ahd_find_tmode_devs(ahd, sim, ccb, &tstate, &lstate, |
10235 | /*notfound_failure*/FALSE); |
10236 | |
10237 | if (status != CAM_REQ_CMP) { |
10238 | ccb->ccb_h.status = status; |
10239 | return; |
10240 | } |
10241 | |
10242 | if ((ahd->features & AHD_MULTIROLE) != 0) { |
10243 | u_int our_id; |
10244 | |
10245 | our_id = ahd->our_id; |
10246 | if (ccb->ccb_h.target_id != our_id) { |
10247 | if ((ahd->features & AHD_MULTI_TID) != 0 |
10248 | && (ahd->flags & AHD_INITIATORROLE) != 0) { |
10249 | /* |
10250 | * Only allow additional targets if |
10251 | * the initiator role is disabled. |
10252 | * The hardware cannot handle a re-select-in |
10253 | * on the initiator id during a re-select-out |
10254 | * on a different target id. |
10255 | */ |
10256 | status = CAM_TID_INVALID; |
10257 | } else if ((ahd->flags & AHD_INITIATORROLE) != 0 |
10258 | || ahd->enabled_luns > 0) { |
10259 | /* |
10260 | * Only allow our target id to change |
10261 | * if the initiator role is not configured |
10262 | * and there are no enabled luns which |
10263 | * are attached to the currently registered |
10264 | * scsi id. |
10265 | */ |
10266 | status = CAM_TID_INVALID; |
10267 | } |
10268 | } |
10269 | } |
10270 | |
10271 | if (status != CAM_REQ_CMP) { |
10272 | ccb->ccb_h.status = status; |
10273 | return; |
10274 | } |
10275 | |
10276 | /* |
10277 | * We now have an id that is valid. |
10278 | * If we aren't in target mode, switch modes. |
10279 | */ |
10280 | if ((ahd->flags & AHD_TARGETROLE) == 0 |
10281 | && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { |
10282 | u_long s; |
10283 | |
10284 | printk("Configuring Target Mode\n" ); |
10285 | ahd_lock(ahd, &s); |
10286 | if (LIST_FIRST(&ahd->pending_scbs) != NULL) { |
10287 | ccb->ccb_h.status = CAM_BUSY; |
10288 | ahd_unlock(ahd, &s); |
10289 | return; |
10290 | } |
10291 | ahd->flags |= AHD_TARGETROLE; |
10292 | if ((ahd->features & AHD_MULTIROLE) == 0) |
10293 | ahd->flags &= ~AHD_INITIATORROLE; |
10294 | ahd_pause(ahd); |
10295 | ahd_loadseq(ahd); |
10296 | ahd_restart(ahd); |
10297 | ahd_unlock(ahd, &s); |
10298 | } |
10299 | cel = &ccb->cel; |
10300 | target = ccb->ccb_h.target_id; |
10301 | lun = ccb->ccb_h.target_lun; |
10302 | channel = SIM_CHANNEL(ahd, sim); |
10303 | target_mask = 0x01 << target; |
10304 | if (channel == 'B') |
10305 | target_mask <<= 8; |
10306 | |
10307 | if (cel->enable != 0) { |
10308 | u_int scsiseq1; |
10309 | |
10310 | /* Are we already enabled?? */ |
10311 | if (lstate != NULL) { |
10312 | xpt_print_path(ccb->ccb_h.path); |
10313 | printk("Lun already enabled\n" ); |
10314 | ccb->ccb_h.status = CAM_LUN_ALRDY_ENA; |
10315 | return; |
10316 | } |
10317 | |
10318 | if (cel->grp6_len != 0 |
10319 | || cel->grp7_len != 0) { |
10320 | /* |
10321 | * Don't (yet?) support vendor |
10322 | * specific commands. |
10323 | */ |
10324 | ccb->ccb_h.status = CAM_REQ_INVALID; |
10325 | printk("Non-zero Group Codes\n" ); |
10326 | return; |
10327 | } |
10328 | |
10329 | /* |
10330 | * Seems to be okay. |
10331 | * Setup our data structures. |
10332 | */ |
10333 | if (target != CAM_TARGET_WILDCARD && tstate == NULL) { |
10334 | tstate = ahd_alloc_tstate(ahd, target, channel); |
10335 | if (tstate == NULL) { |
10336 | xpt_print_path(ccb->ccb_h.path); |
10337 | printk("Couldn't allocate tstate\n" ); |
10338 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
10339 | return; |
10340 | } |
10341 | } |
10342 | lstate = kzalloc(sizeof(*lstate), GFP_ATOMIC); |
10343 | if (lstate == NULL) { |
10344 | xpt_print_path(ccb->ccb_h.path); |
10345 | printk("Couldn't allocate lstate\n" ); |
10346 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
10347 | return; |
10348 | } |
10349 | status = xpt_create_path(&lstate->path, /*periph*/NULL, |
10350 | xpt_path_path_id(ccb->ccb_h.path), |
10351 | xpt_path_target_id(ccb->ccb_h.path), |
10352 | xpt_path_lun_id(ccb->ccb_h.path)); |
10353 | if (status != CAM_REQ_CMP) { |
10354 | kfree(lstate); |
10355 | xpt_print_path(ccb->ccb_h.path); |
10356 | printk("Couldn't allocate path\n" ); |
10357 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
10358 | return; |
10359 | } |
10360 | SLIST_INIT(&lstate->accept_tios); |
10361 | SLIST_INIT(&lstate->immed_notifies); |
10362 | ahd_lock(ahd, &s); |
10363 | ahd_pause(ahd); |
10364 | if (target != CAM_TARGET_WILDCARD) { |
10365 | tstate->enabled_luns[lun] = lstate; |
10366 | ahd->enabled_luns++; |
10367 | |
10368 | if ((ahd->features & AHD_MULTI_TID) != 0) { |
10369 | u_int targid_mask; |
10370 | |
10371 | targid_mask = ahd_inw(ahd, TARGID); |
10372 | targid_mask |= target_mask; |
10373 | ahd_outw(ahd, TARGID, targid_mask); |
10374 | ahd_update_scsiid(ahd, targid_mask); |
10375 | } else { |
10376 | u_int our_id; |
10377 | char channel; |
10378 | |
10379 | channel = SIM_CHANNEL(ahd, sim); |
10380 | our_id = SIM_SCSI_ID(ahd, sim); |
10381 | |
10382 | /* |
10383 | * This can only happen if selections |
10384 | * are not enabled |
10385 | */ |
10386 | if (target != our_id) { |
10387 | u_int sblkctl; |
10388 | char cur_channel; |
10389 | int swap; |
10390 | |
10391 | sblkctl = ahd_inb(ahd, SBLKCTL); |
10392 | cur_channel = (sblkctl & SELBUSB) |
10393 | ? 'B' : 'A'; |
10394 | if ((ahd->features & AHD_TWIN) == 0) |
10395 | cur_channel = 'A'; |
10396 | swap = cur_channel != channel; |
10397 | ahd->our_id = target; |
10398 | |
10399 | if (swap) |
10400 | ahd_outb(ahd, SBLKCTL, |
10401 | sblkctl ^ SELBUSB); |
10402 | |
10403 | ahd_outb(ahd, SCSIID, target); |
10404 | |
10405 | if (swap) |
10406 | ahd_outb(ahd, SBLKCTL, sblkctl); |
10407 | } |
10408 | } |
10409 | } else |
10410 | ahd->black_hole = lstate; |
10411 | /* Allow select-in operations */ |
10412 | if (ahd->black_hole != NULL && ahd->enabled_luns > 0) { |
10413 | scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE); |
10414 | scsiseq1 |= ENSELI; |
10415 | ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq1); |
10416 | scsiseq1 = ahd_inb(ahd, SCSISEQ1); |
10417 | scsiseq1 |= ENSELI; |
10418 | ahd_outb(ahd, SCSISEQ1, scsiseq1); |
10419 | } |
10420 | ahd_unpause(ahd); |
10421 | ahd_unlock(ahd, &s); |
10422 | ccb->ccb_h.status = CAM_REQ_CMP; |
10423 | xpt_print_path(ccb->ccb_h.path); |
10424 | printk("Lun now enabled for target mode\n" ); |
10425 | } else { |
10426 | struct scb *scb; |
10427 | int i, empty; |
10428 | |
10429 | if (lstate == NULL) { |
10430 | ccb->ccb_h.status = CAM_LUN_INVALID; |
10431 | return; |
10432 | } |
10433 | |
10434 | ahd_lock(ahd, &s); |
10435 | |
10436 | ccb->ccb_h.status = CAM_REQ_CMP; |
10437 | LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) { |
10438 | struct ccb_hdr *ccbh; |
10439 | |
10440 | ccbh = &scb->io_ctx->ccb_h; |
10441 | if (ccbh->func_code == XPT_CONT_TARGET_IO |
10442 | && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){ |
10443 | printk("CTIO pending\n" ); |
10444 | ccb->ccb_h.status = CAM_REQ_INVALID; |
10445 | ahd_unlock(ahd, &s); |
10446 | return; |
10447 | } |
10448 | } |
10449 | |
10450 | if (SLIST_FIRST(&lstate->accept_tios) != NULL) { |
10451 | printk("ATIOs pending\n" ); |
10452 | ccb->ccb_h.status = CAM_REQ_INVALID; |
10453 | } |
10454 | |
10455 | if (SLIST_FIRST(&lstate->immed_notifies) != NULL) { |
10456 | printk("INOTs pending\n" ); |
10457 | ccb->ccb_h.status = CAM_REQ_INVALID; |
10458 | } |
10459 | |
10460 | if (ccb->ccb_h.status != CAM_REQ_CMP) { |
10461 | ahd_unlock(ahd, &s); |
10462 | return; |
10463 | } |
10464 | |
10465 | xpt_print_path(ccb->ccb_h.path); |
10466 | printk("Target mode disabled\n" ); |
10467 | xpt_free_path(lstate->path); |
10468 | kfree(lstate); |
10469 | |
10470 | ahd_pause(ahd); |
10471 | /* Can we clean up the target too? */ |
10472 | if (target != CAM_TARGET_WILDCARD) { |
10473 | tstate->enabled_luns[lun] = NULL; |
10474 | ahd->enabled_luns--; |
10475 | for (empty = 1, i = 0; i < 8; i++) |
10476 | if (tstate->enabled_luns[i] != NULL) { |
10477 | empty = 0; |
10478 | break; |
10479 | } |
10480 | |
10481 | if (empty) { |
10482 | ahd_free_tstate(ahd, target, channel, |
10483 | /*force*/FALSE); |
10484 | if (ahd->features & AHD_MULTI_TID) { |
10485 | u_int targid_mask; |
10486 | |
10487 | targid_mask = ahd_inw(ahd, TARGID); |
10488 | targid_mask &= ~target_mask; |
10489 | ahd_outw(ahd, TARGID, targid_mask); |
10490 | ahd_update_scsiid(ahd, targid_mask); |
10491 | } |
10492 | } |
10493 | } else { |
10494 | |
10495 | ahd->black_hole = NULL; |
10496 | |
10497 | /* |
10498 | * We can't allow selections without |
10499 | * our black hole device. |
10500 | */ |
10501 | empty = TRUE; |
10502 | } |
10503 | if (ahd->enabled_luns == 0) { |
10504 | /* Disallow select-in */ |
10505 | u_int scsiseq1; |
10506 | |
10507 | scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE); |
10508 | scsiseq1 &= ~ENSELI; |
10509 | ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq1); |
10510 | scsiseq1 = ahd_inb(ahd, SCSISEQ1); |
10511 | scsiseq1 &= ~ENSELI; |
10512 | ahd_outb(ahd, SCSISEQ1, scsiseq1); |
10513 | |
10514 | if ((ahd->features & AHD_MULTIROLE) == 0) { |
10515 | printk("Configuring Initiator Mode\n" ); |
10516 | ahd->flags &= ~AHD_TARGETROLE; |
10517 | ahd->flags |= AHD_INITIATORROLE; |
10518 | ahd_pause(ahd); |
10519 | ahd_loadseq(ahd); |
10520 | ahd_restart(ahd); |
10521 | /* |
10522 | * Unpaused. The extra unpause |
10523 | * that follows is harmless. |
10524 | */ |
10525 | } |
10526 | } |
10527 | ahd_unpause(ahd); |
10528 | ahd_unlock(ahd, &s); |
10529 | } |
10530 | #endif |
10531 | } |
10532 | |
10533 | static void |
10534 | ahd_update_scsiid(struct ahd_softc *ahd, u_int targid_mask) |
10535 | { |
10536 | #if NOT_YET |
10537 | u_int scsiid_mask; |
10538 | u_int scsiid; |
10539 | |
10540 | if ((ahd->features & AHD_MULTI_TID) == 0) |
10541 | panic("ahd_update_scsiid called on non-multitid unit\n" ); |
10542 | |
10543 | /* |
10544 | * Since we will rely on the TARGID mask |
10545 | * for selection enables, ensure that OID |
10546 | * in SCSIID is not set to some other ID |
10547 | * that we don't want to allow selections on. |
10548 | */ |
10549 | if ((ahd->features & AHD_ULTRA2) != 0) |
10550 | scsiid = ahd_inb(ahd, SCSIID_ULTRA2); |
10551 | else |
10552 | scsiid = ahd_inb(ahd, SCSIID); |
10553 | scsiid_mask = 0x1 << (scsiid & OID); |
10554 | if ((targid_mask & scsiid_mask) == 0) { |
10555 | u_int our_id; |
10556 | |
10557 | /* ffs counts from 1 */ |
10558 | our_id = ffs(targid_mask); |
10559 | if (our_id == 0) |
10560 | our_id = ahd->our_id; |
10561 | else |
10562 | our_id--; |
10563 | scsiid &= TID; |
10564 | scsiid |= our_id; |
10565 | } |
10566 | if ((ahd->features & AHD_ULTRA2) != 0) |
10567 | ahd_outb(ahd, SCSIID_ULTRA2, scsiid); |
10568 | else |
10569 | ahd_outb(ahd, SCSIID, scsiid); |
10570 | #endif |
10571 | } |
10572 | |
10573 | static void |
10574 | ahd_run_tqinfifo(struct ahd_softc *ahd, int paused) |
10575 | { |
10576 | struct target_cmd *cmd; |
10577 | |
10578 | ahd_sync_tqinfifo(ahd, BUS_DMASYNC_POSTREAD); |
10579 | while ((cmd = &ahd->targetcmds[ahd->tqinfifonext])->cmd_valid != 0) { |
10580 | |
10581 | /* |
10582 | * Only advance through the queue if we |
10583 | * have the resources to process the command. |
10584 | */ |
10585 | if (ahd_handle_target_cmd(ahd, cmd) != 0) |
10586 | break; |
10587 | |
10588 | cmd->cmd_valid = 0; |
10589 | ahd_dmamap_sync(ahd, ahd->shared_data_dmat, |
10590 | ahd->shared_data_map.dmamap, |
10591 | ahd_targetcmd_offset(ahd, ahd->tqinfifonext), |
10592 | sizeof(struct target_cmd), |
10593 | BUS_DMASYNC_PREREAD); |
10594 | ahd->tqinfifonext++; |
10595 | |
10596 | /* |
10597 | * Lazily update our position in the target mode incoming |
10598 | * command queue as seen by the sequencer. |
10599 | */ |
10600 | if ((ahd->tqinfifonext & (HOST_TQINPOS - 1)) == 1) { |
10601 | u_int hs_mailbox; |
10602 | |
10603 | hs_mailbox = ahd_inb(ahd, HS_MAILBOX); |
10604 | hs_mailbox &= ~HOST_TQINPOS; |
10605 | hs_mailbox |= ahd->tqinfifonext & HOST_TQINPOS; |
10606 | ahd_outb(ahd, HS_MAILBOX, hs_mailbox); |
10607 | } |
10608 | } |
10609 | } |
10610 | |
10611 | static int |
10612 | ahd_handle_target_cmd(struct ahd_softc *ahd, struct target_cmd *cmd) |
10613 | { |
10614 | struct ahd_tmode_tstate *tstate; |
10615 | struct ahd_tmode_lstate *lstate; |
10616 | struct ccb_accept_tio *atio; |
10617 | uint8_t *byte; |
10618 | int initiator; |
10619 | int target; |
10620 | int lun; |
10621 | |
10622 | initiator = SCSIID_TARGET(ahd, cmd->scsiid); |
10623 | target = SCSIID_OUR_ID(cmd->scsiid); |
10624 | lun = (cmd->identify & MSG_IDENTIFY_LUNMASK); |
10625 | |
10626 | byte = cmd->bytes; |
10627 | tstate = ahd->enabled_targets[target]; |
10628 | lstate = NULL; |
10629 | if (tstate != NULL) |
10630 | lstate = tstate->enabled_luns[lun]; |
10631 | |
10632 | /* |
10633 | * Commands for disabled luns go to the black hole driver. |
10634 | */ |
10635 | if (lstate == NULL) |
10636 | lstate = ahd->black_hole; |
10637 | |
10638 | atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios); |
10639 | if (atio == NULL) { |
10640 | ahd->flags |= AHD_TQINFIFO_BLOCKED; |
10641 | /* |
10642 | * Wait for more ATIOs from the peripheral driver for this lun. |
10643 | */ |
10644 | return (1); |
10645 | } else |
10646 | ahd->flags &= ~AHD_TQINFIFO_BLOCKED; |
10647 | #ifdef AHD_DEBUG |
10648 | if ((ahd_debug & AHD_SHOW_TQIN) != 0) |
10649 | printk("Incoming command from %d for %d:%d%s\n" , |
10650 | initiator, target, lun, |
10651 | lstate == ahd->black_hole ? "(Black Holed)" : "" ); |
10652 | #endif |
10653 | SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); |
10654 | |
10655 | if (lstate == ahd->black_hole) { |
10656 | /* Fill in the wildcards */ |
10657 | atio->ccb_h.target_id = target; |
10658 | atio->ccb_h.target_lun = lun; |
10659 | } |
10660 | |
10661 | /* |
10662 | * Package it up and send it off to |
10663 | * whomever has this lun enabled. |
10664 | */ |
10665 | atio->sense_len = 0; |
10666 | atio->init_id = initiator; |
10667 | if (byte[0] != 0xFF) { |
10668 | /* Tag was included */ |
10669 | atio->tag_action = *byte++; |
10670 | atio->tag_id = *byte++; |
10671 | atio->ccb_h.flags = CAM_TAG_ACTION_VALID; |
10672 | } else { |
10673 | atio->ccb_h.flags = 0; |
10674 | } |
10675 | byte++; |
10676 | |
10677 | /* Okay. Now determine the cdb size based on the command code */ |
10678 | switch (*byte >> CMD_GROUP_CODE_SHIFT) { |
10679 | case 0: |
10680 | atio->cdb_len = 6; |
10681 | break; |
10682 | case 1: |
10683 | case 2: |
10684 | atio->cdb_len = 10; |
10685 | break; |
10686 | case 4: |
10687 | atio->cdb_len = 16; |
10688 | break; |
10689 | case 5: |
10690 | atio->cdb_len = 12; |
10691 | break; |
10692 | case 3: |
10693 | default: |
10694 | /* Only copy the opcode. */ |
10695 | atio->cdb_len = 1; |
10696 | printk("Reserved or VU command code type encountered\n" ); |
10697 | break; |
10698 | } |
10699 | |
10700 | memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len); |
10701 | |
10702 | atio->ccb_h.status |= CAM_CDB_RECVD; |
10703 | |
10704 | if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) { |
10705 | /* |
10706 | * We weren't allowed to disconnect. |
10707 | * We're hanging on the bus until a |
10708 | * continue target I/O comes in response |
10709 | * to this accept tio. |
10710 | */ |
10711 | #ifdef AHD_DEBUG |
10712 | if ((ahd_debug & AHD_SHOW_TQIN) != 0) |
10713 | printk("Received Immediate Command %d:%d:%d - %p\n" , |
10714 | initiator, target, lun, ahd->pending_device); |
10715 | #endif |
10716 | ahd->pending_device = lstate; |
10717 | ahd_freeze_ccb((union ccb *)atio); |
10718 | atio->ccb_h.flags |= CAM_DIS_DISCONNECT; |
10719 | } |
10720 | xpt_done((union ccb*)atio); |
10721 | return (0); |
10722 | } |
10723 | |
10724 | #endif |
10725 | |