1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright IBM Corp. 2001, 2007 |
4 | * Authors: Fritz Elfert (felfert@millenux.com) |
5 | * Peter Tiedemann (ptiedem@de.ibm.com) |
6 | * MPC additions : |
7 | * Belinda Thompson (belindat@us.ibm.com) |
8 | * Andy Richter (richtera@us.ibm.com) |
9 | */ |
10 | |
11 | #undef DEBUG |
12 | #undef DEBUGDATA |
13 | #undef DEBUGCCW |
14 | |
15 | #define KMSG_COMPONENT "ctcm" |
16 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
17 | |
18 | #include <linux/module.h> |
19 | #include <linux/init.h> |
20 | #include <linux/kernel.h> |
21 | #include <linux/slab.h> |
22 | #include <linux/errno.h> |
23 | #include <linux/types.h> |
24 | #include <linux/interrupt.h> |
25 | #include <linux/timer.h> |
26 | #include <linux/bitops.h> |
27 | |
28 | #include <linux/signal.h> |
29 | #include <linux/string.h> |
30 | |
31 | #include <linux/ip.h> |
32 | #include <linux/if_arp.h> |
33 | #include <linux/tcp.h> |
34 | #include <linux/skbuff.h> |
35 | #include <linux/ctype.h> |
36 | #include <net/dst.h> |
37 | |
38 | #include <linux/io.h> |
39 | #include <asm/ccwdev.h> |
40 | #include <asm/ccwgroup.h> |
41 | #include <linux/uaccess.h> |
42 | |
43 | #include <asm/idals.h> |
44 | |
45 | #include "fsm.h" |
46 | |
47 | #include "ctcm_dbug.h" |
48 | #include "ctcm_main.h" |
49 | #include "ctcm_fsms.h" |
50 | |
51 | const char *dev_state_names[] = { |
52 | [DEV_STATE_STOPPED] = "Stopped" , |
53 | [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX" , |
54 | [DEV_STATE_STARTWAIT_RX] = "StartWait RX" , |
55 | [DEV_STATE_STARTWAIT_TX] = "StartWait TX" , |
56 | [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX" , |
57 | [DEV_STATE_STOPWAIT_RX] = "StopWait RX" , |
58 | [DEV_STATE_STOPWAIT_TX] = "StopWait TX" , |
59 | [DEV_STATE_RUNNING] = "Running" , |
60 | }; |
61 | |
62 | const char *dev_event_names[] = { |
63 | [DEV_EVENT_START] = "Start" , |
64 | [DEV_EVENT_STOP] = "Stop" , |
65 | [DEV_EVENT_RXUP] = "RX up" , |
66 | [DEV_EVENT_TXUP] = "TX up" , |
67 | [DEV_EVENT_RXDOWN] = "RX down" , |
68 | [DEV_EVENT_TXDOWN] = "TX down" , |
69 | [DEV_EVENT_RESTART] = "Restart" , |
70 | }; |
71 | |
72 | const char *ctc_ch_event_names[] = { |
73 | [CTC_EVENT_IO_SUCCESS] = "ccw_device success" , |
74 | [CTC_EVENT_IO_EBUSY] = "ccw_device busy" , |
75 | [CTC_EVENT_IO_ENODEV] = "ccw_device enodev" , |
76 | [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown" , |
77 | [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY" , |
78 | [CTC_EVENT_ATTN] = "Status ATTN" , |
79 | [CTC_EVENT_BUSY] = "Status BUSY" , |
80 | [CTC_EVENT_UC_RCRESET] = "Unit check remote reset" , |
81 | [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset" , |
82 | [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout" , |
83 | [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity" , |
84 | [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure" , |
85 | [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity" , |
86 | [CTC_EVENT_UC_ZERO] = "Unit check ZERO" , |
87 | [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown" , |
88 | [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown" , |
89 | [CTC_EVENT_MC_FAIL] = "Machine check failure" , |
90 | [CTC_EVENT_MC_GOOD] = "Machine check operational" , |
91 | [CTC_EVENT_IRQ] = "IRQ normal" , |
92 | [CTC_EVENT_FINSTAT] = "IRQ final" , |
93 | [CTC_EVENT_TIMER] = "Timer" , |
94 | [CTC_EVENT_START] = "Start" , |
95 | [CTC_EVENT_STOP] = "Stop" , |
96 | /* |
97 | * additional MPC events |
98 | */ |
99 | [CTC_EVENT_SEND_XID] = "XID Exchange" , |
100 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer" , |
101 | }; |
102 | |
103 | const char *ctc_ch_state_names[] = { |
104 | [CTC_STATE_IDLE] = "Idle" , |
105 | [CTC_STATE_STOPPED] = "Stopped" , |
106 | [CTC_STATE_STARTWAIT] = "StartWait" , |
107 | [CTC_STATE_STARTRETRY] = "StartRetry" , |
108 | [CTC_STATE_SETUPWAIT] = "SetupWait" , |
109 | [CTC_STATE_RXINIT] = "RX init" , |
110 | [CTC_STATE_TXINIT] = "TX init" , |
111 | [CTC_STATE_RX] = "RX" , |
112 | [CTC_STATE_TX] = "TX" , |
113 | [CTC_STATE_RXIDLE] = "RX idle" , |
114 | [CTC_STATE_TXIDLE] = "TX idle" , |
115 | [CTC_STATE_RXERR] = "RX error" , |
116 | [CTC_STATE_TXERR] = "TX error" , |
117 | [CTC_STATE_TERM] = "Terminating" , |
118 | [CTC_STATE_DTERM] = "Restarting" , |
119 | [CTC_STATE_NOTOP] = "Not operational" , |
120 | /* |
121 | * additional MPC states |
122 | */ |
123 | [CH_XID0_PENDING] = "Pending XID0 Start" , |
124 | [CH_XID0_INPROGRESS] = "In XID0 Negotiations " , |
125 | [CH_XID7_PENDING] = "Pending XID7 P1 Start" , |
126 | [CH_XID7_PENDING1] = "Active XID7 P1 Exchange " , |
127 | [CH_XID7_PENDING2] = "Pending XID7 P2 Start " , |
128 | [CH_XID7_PENDING3] = "Active XID7 P2 Exchange " , |
129 | [CH_XID7_PENDING4] = "XID7 Complete - Pending READY " , |
130 | }; |
131 | |
132 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); |
133 | |
134 | /* |
135 | * ----- static ctcm actions for channel statemachine ----- |
136 | * |
137 | */ |
138 | static void chx_txdone(fsm_instance *fi, int event, void *arg); |
139 | static void chx_rx(fsm_instance *fi, int event, void *arg); |
140 | static void chx_rxidle(fsm_instance *fi, int event, void *arg); |
141 | static void chx_firstio(fsm_instance *fi, int event, void *arg); |
142 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); |
143 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); |
144 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); |
145 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); |
146 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); |
147 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); |
148 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); |
149 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); |
150 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); |
151 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); |
152 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); |
153 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); |
154 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); |
155 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); |
156 | |
157 | /* |
158 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- |
159 | * |
160 | */ |
161 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg); |
162 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg); |
163 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg); |
164 | /* shared : |
165 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); |
166 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); |
167 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); |
168 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); |
169 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); |
170 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); |
171 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); |
172 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); |
173 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); |
174 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); |
175 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); |
176 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); |
177 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); |
178 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); |
179 | */ |
180 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg); |
181 | static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *); |
182 | static void ctcmpc_chx_resend(fsm_instance *, int, void *); |
183 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg); |
184 | |
185 | /* |
186 | * Check return code of a preceding ccw_device call, halt_IO etc... |
187 | * |
188 | * ch : The channel, the error belongs to. |
189 | * Returns the error code (!= 0) to inspect. |
190 | */ |
191 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) |
192 | { |
193 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
194 | "%s(%s): %s: %04x\n" , |
195 | CTCM_FUNTAIL, ch->id, msg, rc); |
196 | switch (rc) { |
197 | case -EBUSY: |
198 | pr_info("%s: The communication peer is busy\n" , |
199 | ch->id); |
200 | fsm_event(fi: ch->fsm, event: CTC_EVENT_IO_EBUSY, arg: ch); |
201 | break; |
202 | case -ENODEV: |
203 | pr_err("%s: The specified target device is not valid\n" , |
204 | ch->id); |
205 | fsm_event(fi: ch->fsm, event: CTC_EVENT_IO_ENODEV, arg: ch); |
206 | break; |
207 | default: |
208 | pr_err("An I/O operation resulted in error %04x\n" , |
209 | rc); |
210 | fsm_event(fi: ch->fsm, event: CTC_EVENT_IO_UNKNOWN, arg: ch); |
211 | } |
212 | } |
213 | |
214 | void ctcm_purge_skb_queue(struct sk_buff_head *q) |
215 | { |
216 | struct sk_buff *skb; |
217 | |
218 | CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__); |
219 | |
220 | while ((skb = skb_dequeue(list: q))) { |
221 | refcount_dec(r: &skb->users); |
222 | dev_kfree_skb_any(skb); |
223 | } |
224 | } |
225 | |
226 | /* |
227 | * NOP action for statemachines |
228 | */ |
229 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) |
230 | { |
231 | } |
232 | |
233 | /* |
234 | * Actions for channel - statemachines. |
235 | */ |
236 | |
237 | /* |
238 | * Normal data has been send. Free the corresponding |
239 | * skb (it's in io_queue), reset dev->tbusy and |
240 | * revert to idle state. |
241 | * |
242 | * fi An instance of a channel statemachine. |
243 | * event The event, just happened. |
244 | * arg Generic pointer, casted from channel * upon call. |
245 | */ |
246 | static void chx_txdone(fsm_instance *fi, int event, void *arg) |
247 | { |
248 | struct channel *ch = arg; |
249 | struct net_device *dev = ch->netdev; |
250 | struct ctcm_priv *priv = dev->ml_priv; |
251 | struct sk_buff *skb; |
252 | int first = 1; |
253 | int i; |
254 | unsigned long duration; |
255 | unsigned long done_stamp = jiffies; |
256 | |
257 | CTCM_PR_DEBUG("%s(%s): %s\n" , __func__, ch->id, dev->name); |
258 | |
259 | duration = done_stamp - ch->prof.send_stamp; |
260 | if (duration > ch->prof.tx_time) |
261 | ch->prof.tx_time = duration; |
262 | |
263 | if (ch->irb->scsw.cmd.count != 0) |
264 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
265 | "%s(%s): TX not complete, remaining %d bytes" , |
266 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); |
267 | fsm_deltimer(timer: &ch->timer); |
268 | while ((skb = skb_dequeue(list: &ch->io_queue))) { |
269 | priv->stats.tx_packets++; |
270 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; |
271 | if (first) { |
272 | priv->stats.tx_bytes += 2; |
273 | first = 0; |
274 | } |
275 | refcount_dec(r: &skb->users); |
276 | dev_kfree_skb_irq(skb); |
277 | } |
278 | spin_lock(lock: &ch->collect_lock); |
279 | clear_normalized_cda(&ch->ccw[4]); |
280 | if (ch->collect_len > 0) { |
281 | int rc; |
282 | |
283 | if (ctcm_checkalloc_buffer(ch)) { |
284 | spin_unlock(lock: &ch->collect_lock); |
285 | return; |
286 | } |
287 | ch->trans_skb->data = ch->trans_skb_data; |
288 | skb_reset_tail_pointer(skb: ch->trans_skb); |
289 | ch->trans_skb->len = 0; |
290 | if (ch->prof.maxmulti < (ch->collect_len + 2)) |
291 | ch->prof.maxmulti = ch->collect_len + 2; |
292 | if (ch->prof.maxcqueue < skb_queue_len(list_: &ch->collect_queue)) |
293 | ch->prof.maxcqueue = skb_queue_len(list_: &ch->collect_queue); |
294 | *((__u16 *)skb_put(skb: ch->trans_skb, len: 2)) = ch->collect_len + 2; |
295 | i = 0; |
296 | while ((skb = skb_dequeue(list: &ch->collect_queue))) { |
297 | skb_copy_from_linear_data(skb, |
298 | to: skb_put(skb: ch->trans_skb, len: skb->len), len: skb->len); |
299 | priv->stats.tx_packets++; |
300 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; |
301 | refcount_dec(r: &skb->users); |
302 | dev_kfree_skb_irq(skb); |
303 | i++; |
304 | } |
305 | ch->collect_len = 0; |
306 | spin_unlock(lock: &ch->collect_lock); |
307 | ch->ccw[1].count = ch->trans_skb->len; |
308 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
309 | ch->prof.send_stamp = jiffies; |
310 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
311 | ch->prof.doios_multi++; |
312 | if (rc != 0) { |
313 | priv->stats.tx_dropped += i; |
314 | priv->stats.tx_errors += i; |
315 | fsm_deltimer(timer: &ch->timer); |
316 | ctcm_ccw_check_rc(ch, rc, msg: "chained TX" ); |
317 | } |
318 | } else { |
319 | spin_unlock(lock: &ch->collect_lock); |
320 | fsm_newstate(fi, newstate: CTC_STATE_TXIDLE); |
321 | } |
322 | ctcm_clear_busy_do(dev); |
323 | } |
324 | |
325 | /* |
326 | * Initial data is sent. |
327 | * Notify device statemachine that we are up and |
328 | * running. |
329 | * |
330 | * fi An instance of a channel statemachine. |
331 | * event The event, just happened. |
332 | * arg Generic pointer, casted from channel * upon call. |
333 | */ |
334 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) |
335 | { |
336 | struct channel *ch = arg; |
337 | struct net_device *dev = ch->netdev; |
338 | struct ctcm_priv *priv = dev->ml_priv; |
339 | |
340 | CTCM_PR_DEBUG("%s(%s): %s\n" , __func__, ch->id, dev->name); |
341 | |
342 | fsm_deltimer(timer: &ch->timer); |
343 | fsm_newstate(fi, newstate: CTC_STATE_TXIDLE); |
344 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXUP, arg: ch->netdev); |
345 | } |
346 | |
347 | /* |
348 | * Got normal data, check for sanity, queue it up, allocate new buffer |
349 | * trigger bottom half, and initiate next read. |
350 | * |
351 | * fi An instance of a channel statemachine. |
352 | * event The event, just happened. |
353 | * arg Generic pointer, casted from channel * upon call. |
354 | */ |
355 | static void chx_rx(fsm_instance *fi, int event, void *arg) |
356 | { |
357 | struct channel *ch = arg; |
358 | struct net_device *dev = ch->netdev; |
359 | struct ctcm_priv *priv = dev->ml_priv; |
360 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
361 | struct sk_buff *skb = ch->trans_skb; |
362 | __u16 block_len = *((__u16 *)skb->data); |
363 | int check_len; |
364 | int rc; |
365 | |
366 | fsm_deltimer(timer: &ch->timer); |
367 | if (len < 8) { |
368 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
369 | "%s(%s): got packet with length %d < 8\n" , |
370 | CTCM_FUNTAIL, dev->name, len); |
371 | priv->stats.rx_dropped++; |
372 | priv->stats.rx_length_errors++; |
373 | goto again; |
374 | } |
375 | if (len > ch->max_bufsize) { |
376 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
377 | "%s(%s): got packet with length %d > %d\n" , |
378 | CTCM_FUNTAIL, dev->name, len, ch->max_bufsize); |
379 | priv->stats.rx_dropped++; |
380 | priv->stats.rx_length_errors++; |
381 | goto again; |
382 | } |
383 | |
384 | /* |
385 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. |
386 | */ |
387 | switch (ch->protocol) { |
388 | case CTCM_PROTO_S390: |
389 | case CTCM_PROTO_OS390: |
390 | check_len = block_len + 2; |
391 | break; |
392 | default: |
393 | check_len = block_len; |
394 | break; |
395 | } |
396 | if ((len < block_len) || (len > check_len)) { |
397 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
398 | "%s(%s): got block length %d != rx length %d\n" , |
399 | CTCM_FUNTAIL, dev->name, block_len, len); |
400 | if (do_debug) |
401 | ctcmpc_dump_skb(skb, offset: 0); |
402 | |
403 | *((__u16 *)skb->data) = len; |
404 | priv->stats.rx_dropped++; |
405 | priv->stats.rx_length_errors++; |
406 | goto again; |
407 | } |
408 | if (block_len > 2) { |
409 | *((__u16 *)skb->data) = block_len - 2; |
410 | ctcm_unpack_skb(ch, pskb: skb); |
411 | } |
412 | again: |
413 | skb->data = ch->trans_skb_data; |
414 | skb_reset_tail_pointer(skb); |
415 | skb->len = 0; |
416 | if (ctcm_checkalloc_buffer(ch)) |
417 | return; |
418 | ch->ccw[1].count = ch->max_bufsize; |
419 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
420 | if (rc != 0) |
421 | ctcm_ccw_check_rc(ch, rc, msg: "normal RX" ); |
422 | } |
423 | |
424 | /* |
425 | * Initialize connection by sending a __u16 of value 0. |
426 | * |
427 | * fi An instance of a channel statemachine. |
428 | * event The event, just happened. |
429 | * arg Generic pointer, casted from channel * upon call. |
430 | */ |
431 | static void chx_firstio(fsm_instance *fi, int event, void *arg) |
432 | { |
433 | int rc; |
434 | struct channel *ch = arg; |
435 | int fsmstate = fsm_getstate(fi); |
436 | |
437 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
438 | "%s(%s) : %02x" , |
439 | CTCM_FUNTAIL, ch->id, fsmstate); |
440 | |
441 | ch->sense_rc = 0; /* reset unit check report control */ |
442 | if (fsmstate == CTC_STATE_TXIDLE) |
443 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
444 | "%s(%s): remote side issued READ?, init.\n" , |
445 | CTCM_FUNTAIL, ch->id); |
446 | fsm_deltimer(timer: &ch->timer); |
447 | if (ctcm_checkalloc_buffer(ch)) |
448 | return; |
449 | if ((fsmstate == CTC_STATE_SETUPWAIT) && |
450 | (ch->protocol == CTCM_PROTO_OS390)) { |
451 | /* OS/390 resp. z/OS */ |
452 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
453 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
454 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, |
455 | event: CTC_EVENT_TIMER, arg: ch); |
456 | chx_rxidle(fi, event, arg); |
457 | } else { |
458 | struct net_device *dev = ch->netdev; |
459 | struct ctcm_priv *priv = dev->ml_priv; |
460 | fsm_newstate(fi, newstate: CTC_STATE_TXIDLE); |
461 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXUP, arg: dev); |
462 | } |
463 | return; |
464 | } |
465 | /* |
466 | * Don't setup a timer for receiving the initial RX frame |
467 | * if in compatibility mode, since VM TCP delays the initial |
468 | * frame until it has some data to send. |
469 | */ |
470 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) || |
471 | (ch->protocol != CTCM_PROTO_S390)) |
472 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
473 | |
474 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
475 | ch->ccw[1].count = 2; /* Transfer only length */ |
476 | |
477 | fsm_newstate(fi, newstate: (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
478 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
479 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
480 | if (rc != 0) { |
481 | fsm_deltimer(timer: &ch->timer); |
482 | fsm_newstate(fi, newstate: CTC_STATE_SETUPWAIT); |
483 | ctcm_ccw_check_rc(ch, rc, msg: "init IO" ); |
484 | } |
485 | /* |
486 | * If in compatibility mode since we don't setup a timer, we |
487 | * also signal RX channel up immediately. This enables us |
488 | * to send packets early which in turn usually triggers some |
489 | * reply from VM TCP which brings up the RX channel to it's |
490 | * final state. |
491 | */ |
492 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) && |
493 | (ch->protocol == CTCM_PROTO_S390)) { |
494 | struct net_device *dev = ch->netdev; |
495 | struct ctcm_priv *priv = dev->ml_priv; |
496 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXUP, arg: dev); |
497 | } |
498 | } |
499 | |
500 | /* |
501 | * Got initial data, check it. If OK, |
502 | * notify device statemachine that we are up and |
503 | * running. |
504 | * |
505 | * fi An instance of a channel statemachine. |
506 | * event The event, just happened. |
507 | * arg Generic pointer, casted from channel * upon call. |
508 | */ |
509 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) |
510 | { |
511 | struct channel *ch = arg; |
512 | struct net_device *dev = ch->netdev; |
513 | struct ctcm_priv *priv = dev->ml_priv; |
514 | __u16 buflen; |
515 | int rc; |
516 | |
517 | fsm_deltimer(timer: &ch->timer); |
518 | buflen = *((__u16 *)ch->trans_skb->data); |
519 | CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n" , |
520 | __func__, dev->name, buflen); |
521 | |
522 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { |
523 | if (ctcm_checkalloc_buffer(ch)) |
524 | return; |
525 | ch->ccw[1].count = ch->max_bufsize; |
526 | fsm_newstate(fi, newstate: CTC_STATE_RXIDLE); |
527 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
528 | if (rc != 0) { |
529 | fsm_newstate(fi, newstate: CTC_STATE_RXINIT); |
530 | ctcm_ccw_check_rc(ch, rc, msg: "initial RX" ); |
531 | } else |
532 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXUP, arg: dev); |
533 | } else { |
534 | CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n" , |
535 | __func__, dev->name, |
536 | buflen, CTCM_INITIAL_BLOCKLEN); |
537 | chx_firstio(fi, event, arg); |
538 | } |
539 | } |
540 | |
541 | /* |
542 | * Set channel into extended mode. |
543 | * |
544 | * fi An instance of a channel statemachine. |
545 | * event The event, just happened. |
546 | * arg Generic pointer, casted from channel * upon call. |
547 | */ |
548 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) |
549 | { |
550 | struct channel *ch = arg; |
551 | int rc; |
552 | unsigned long saveflags = 0; |
553 | int timeout = CTCM_TIME_5_SEC; |
554 | |
555 | fsm_deltimer(timer: &ch->timer); |
556 | if (IS_MPC(ch)) { |
557 | timeout = 1500; |
558 | CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n" , |
559 | __func__, smp_processor_id(), ch, ch->id); |
560 | } |
561 | fsm_addtimer(timer: &ch->timer, millisec: timeout, event: CTC_EVENT_TIMER, arg: ch); |
562 | fsm_newstate(fi, newstate: CTC_STATE_SETUPWAIT); |
563 | CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); |
564 | |
565 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ |
566 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
567 | /* Such conditional locking is undeterministic in |
568 | * static view. => ignore sparse warnings here. */ |
569 | |
570 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], 0, 0xff, 0); |
571 | if (event == CTC_EVENT_TIMER) /* see above comments */ |
572 | spin_unlock_irqrestore(lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
573 | if (rc != 0) { |
574 | fsm_deltimer(timer: &ch->timer); |
575 | fsm_newstate(fi, newstate: CTC_STATE_STARTWAIT); |
576 | ctcm_ccw_check_rc(ch, rc, msg: "set Mode" ); |
577 | } else |
578 | ch->retry = 0; |
579 | } |
580 | |
581 | /* |
582 | * Setup channel. |
583 | * |
584 | * fi An instance of a channel statemachine. |
585 | * event The event, just happened. |
586 | * arg Generic pointer, casted from channel * upon call. |
587 | */ |
588 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) |
589 | { |
590 | struct channel *ch = arg; |
591 | unsigned long saveflags; |
592 | int rc; |
593 | |
594 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s" , |
595 | CTCM_FUNTAIL, ch->id, |
596 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX" ); |
597 | |
598 | if (ch->trans_skb != NULL) { |
599 | clear_normalized_cda(&ch->ccw[1]); |
600 | dev_kfree_skb(ch->trans_skb); |
601 | ch->trans_skb = NULL; |
602 | } |
603 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
604 | ch->ccw[1].cmd_code = CCW_CMD_READ; |
605 | ch->ccw[1].flags = CCW_FLAG_SLI; |
606 | ch->ccw[1].count = 0; |
607 | } else { |
608 | ch->ccw[1].cmd_code = CCW_CMD_WRITE; |
609 | ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
610 | ch->ccw[1].count = 0; |
611 | } |
612 | if (ctcm_checkalloc_buffer(ch)) { |
613 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
614 | "%s(%s): %s trans_skb alloc delayed " |
615 | "until first transfer" , |
616 | CTCM_FUNTAIL, ch->id, |
617 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? |
618 | "RX" : "TX" ); |
619 | } |
620 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; |
621 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
622 | ch->ccw[0].count = 0; |
623 | ch->ccw[0].cda = 0; |
624 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ |
625 | ch->ccw[2].flags = CCW_FLAG_SLI; |
626 | ch->ccw[2].count = 0; |
627 | ch->ccw[2].cda = 0; |
628 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); |
629 | ch->ccw[4].cda = 0; |
630 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; |
631 | |
632 | fsm_newstate(fi, newstate: CTC_STATE_STARTWAIT); |
633 | fsm_addtimer(timer: &ch->timer, millisec: 1000, event: CTC_EVENT_TIMER, arg: ch); |
634 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
635 | rc = ccw_device_halt(ch->cdev, 0); |
636 | spin_unlock_irqrestore(lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
637 | if (rc != 0) { |
638 | if (rc != -EBUSY) |
639 | fsm_deltimer(timer: &ch->timer); |
640 | ctcm_ccw_check_rc(ch, rc, msg: "initial HaltIO" ); |
641 | } |
642 | } |
643 | |
644 | /* |
645 | * Shutdown a channel. |
646 | * |
647 | * fi An instance of a channel statemachine. |
648 | * event The event, just happened. |
649 | * arg Generic pointer, casted from channel * upon call. |
650 | */ |
651 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) |
652 | { |
653 | struct channel *ch = arg; |
654 | unsigned long saveflags = 0; |
655 | int rc; |
656 | int oldstate; |
657 | |
658 | fsm_deltimer(timer: &ch->timer); |
659 | if (IS_MPC(ch)) |
660 | fsm_deltimer(timer: &ch->sweep_timer); |
661 | |
662 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
663 | |
664 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ |
665 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
666 | /* Such conditional locking is undeterministic in |
667 | * static view. => ignore sparse warnings here. */ |
668 | oldstate = fsm_getstate(fi); |
669 | fsm_newstate(fi, newstate: CTC_STATE_TERM); |
670 | rc = ccw_device_halt(ch->cdev, 0); |
671 | |
672 | if (event == CTC_EVENT_STOP) |
673 | spin_unlock_irqrestore(lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
674 | /* see remark above about conditional locking */ |
675 | |
676 | if (rc != 0 && rc != -EBUSY) { |
677 | fsm_deltimer(timer: &ch->timer); |
678 | if (event != CTC_EVENT_STOP) { |
679 | fsm_newstate(fi, newstate: oldstate); |
680 | ctcm_ccw_check_rc(ch, rc, msg: (char *)__func__); |
681 | } |
682 | } |
683 | } |
684 | |
685 | /* |
686 | * Cleanup helper for chx_fail and chx_stopped |
687 | * cleanup channels queue and notify interface statemachine. |
688 | * |
689 | * fi An instance of a channel statemachine. |
690 | * state The next state (depending on caller). |
691 | * ch The channel to operate on. |
692 | */ |
693 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, |
694 | struct channel *ch) |
695 | { |
696 | struct net_device *dev = ch->netdev; |
697 | struct ctcm_priv *priv = dev->ml_priv; |
698 | |
699 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
700 | "%s(%s): %s[%d]\n" , |
701 | CTCM_FUNTAIL, dev->name, ch->id, state); |
702 | |
703 | fsm_deltimer(timer: &ch->timer); |
704 | if (IS_MPC(ch)) |
705 | fsm_deltimer(timer: &ch->sweep_timer); |
706 | |
707 | fsm_newstate(fi, newstate: state); |
708 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { |
709 | clear_normalized_cda(&ch->ccw[1]); |
710 | dev_kfree_skb_any(skb: ch->trans_skb); |
711 | ch->trans_skb = NULL; |
712 | } |
713 | |
714 | ch->th_seg = 0x00; |
715 | ch->th_seq_num = 0x00; |
716 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
717 | skb_queue_purge(list: &ch->io_queue); |
718 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
719 | } else { |
720 | ctcm_purge_skb_queue(q: &ch->io_queue); |
721 | if (IS_MPC(ch)) |
722 | ctcm_purge_skb_queue(q: &ch->sweep_queue); |
723 | spin_lock(lock: &ch->collect_lock); |
724 | ctcm_purge_skb_queue(q: &ch->collect_queue); |
725 | ch->collect_len = 0; |
726 | spin_unlock(lock: &ch->collect_lock); |
727 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
728 | } |
729 | } |
730 | |
731 | /* |
732 | * A channel has successfully been halted. |
733 | * Cleanup it's queue and notify interface statemachine. |
734 | * |
735 | * fi An instance of a channel statemachine. |
736 | * event The event, just happened. |
737 | * arg Generic pointer, casted from channel * upon call. |
738 | */ |
739 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) |
740 | { |
741 | ctcm_chx_cleanup(fi, state: CTC_STATE_STOPPED, ch: arg); |
742 | } |
743 | |
744 | /* |
745 | * A stop command from device statemachine arrived and we are in |
746 | * not operational mode. Set state to stopped. |
747 | * |
748 | * fi An instance of a channel statemachine. |
749 | * event The event, just happened. |
750 | * arg Generic pointer, casted from channel * upon call. |
751 | */ |
752 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) |
753 | { |
754 | fsm_newstate(fi, newstate: CTC_STATE_STOPPED); |
755 | } |
756 | |
757 | /* |
758 | * A machine check for no path, not operational status or gone device has |
759 | * happened. |
760 | * Cleanup queue and notify interface statemachine. |
761 | * |
762 | * fi An instance of a channel statemachine. |
763 | * event The event, just happened. |
764 | * arg Generic pointer, casted from channel * upon call. |
765 | */ |
766 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) |
767 | { |
768 | ctcm_chx_cleanup(fi, state: CTC_STATE_NOTOP, ch: arg); |
769 | } |
770 | |
771 | /* |
772 | * Handle error during setup of channel. |
773 | * |
774 | * fi An instance of a channel statemachine. |
775 | * event The event, just happened. |
776 | * arg Generic pointer, casted from channel * upon call. |
777 | */ |
778 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) |
779 | { |
780 | struct channel *ch = arg; |
781 | struct net_device *dev = ch->netdev; |
782 | struct ctcm_priv *priv = dev->ml_priv; |
783 | |
784 | /* |
785 | * Special case: Got UC_RCRESET on setmode. |
786 | * This means that remote side isn't setup. In this case |
787 | * simply retry after some 10 secs... |
788 | */ |
789 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && |
790 | ((event == CTC_EVENT_UC_RCRESET) || |
791 | (event == CTC_EVENT_UC_RSRESET))) { |
792 | fsm_newstate(fi, newstate: CTC_STATE_STARTRETRY); |
793 | fsm_deltimer(timer: &ch->timer); |
794 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
795 | if (!IS_MPC(ch) && |
796 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) { |
797 | int rc = ccw_device_halt(ch->cdev, 0); |
798 | if (rc != 0) |
799 | ctcm_ccw_check_rc(ch, rc, |
800 | msg: "HaltIO in chx_setuperr" ); |
801 | } |
802 | return; |
803 | } |
804 | |
805 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, |
806 | "%s(%s) : %s error during %s channel setup state=%s\n" , |
807 | CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event], |
808 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX" , |
809 | fsm_getstate_str(fi)); |
810 | |
811 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
812 | fsm_newstate(fi, newstate: CTC_STATE_RXERR); |
813 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
814 | } else { |
815 | fsm_newstate(fi, newstate: CTC_STATE_TXERR); |
816 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
817 | } |
818 | } |
819 | |
820 | /* |
821 | * Restart a channel after an error. |
822 | * |
823 | * fi An instance of a channel statemachine. |
824 | * event The event, just happened. |
825 | * arg Generic pointer, casted from channel * upon call. |
826 | */ |
827 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) |
828 | { |
829 | struct channel *ch = arg; |
830 | struct net_device *dev = ch->netdev; |
831 | unsigned long saveflags = 0; |
832 | int oldstate; |
833 | int rc; |
834 | |
835 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
836 | "%s: %s[%d] of %s\n" , |
837 | CTCM_FUNTAIL, ch->id, event, dev->name); |
838 | |
839 | fsm_deltimer(timer: &ch->timer); |
840 | |
841 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
842 | oldstate = fsm_getstate(fi); |
843 | fsm_newstate(fi, newstate: CTC_STATE_STARTWAIT); |
844 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ |
845 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
846 | /* Such conditional locking is a known problem for |
847 | * sparse because its undeterministic in static view. |
848 | * Warnings should be ignored here. */ |
849 | rc = ccw_device_halt(ch->cdev, 0); |
850 | if (event == CTC_EVENT_TIMER) |
851 | spin_unlock_irqrestore(lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
852 | if (rc != 0) { |
853 | if (rc != -EBUSY) { |
854 | fsm_deltimer(timer: &ch->timer); |
855 | fsm_newstate(fi, newstate: oldstate); |
856 | } |
857 | ctcm_ccw_check_rc(ch, rc, msg: "HaltIO in ctcm_chx_restart" ); |
858 | } |
859 | } |
860 | |
861 | /* |
862 | * Handle error during RX initial handshake (exchange of |
863 | * 0-length block header) |
864 | * |
865 | * fi An instance of a channel statemachine. |
866 | * event The event, just happened. |
867 | * arg Generic pointer, casted from channel * upon call. |
868 | */ |
869 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) |
870 | { |
871 | struct channel *ch = arg; |
872 | struct net_device *dev = ch->netdev; |
873 | struct ctcm_priv *priv = dev->ml_priv; |
874 | |
875 | if (event == CTC_EVENT_TIMER) { |
876 | if (!IS_MPCDEV(dev)) |
877 | /* TODO : check if MPC deletes timer somewhere */ |
878 | fsm_deltimer(timer: &ch->timer); |
879 | if (ch->retry++ < 3) |
880 | ctcm_chx_restart(fi, event, arg); |
881 | else { |
882 | fsm_newstate(fi, newstate: CTC_STATE_RXERR); |
883 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
884 | } |
885 | } else { |
886 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
887 | "%s(%s): %s in %s" , CTCM_FUNTAIL, ch->id, |
888 | ctc_ch_event_names[event], fsm_getstate_str(fi)); |
889 | |
890 | dev_warn(&dev->dev, |
891 | "Initialization failed with RX/TX init handshake " |
892 | "error %s\n" , ctc_ch_event_names[event]); |
893 | } |
894 | } |
895 | |
896 | /* |
897 | * Notify device statemachine if we gave up initialization |
898 | * of RX channel. |
899 | * |
900 | * fi An instance of a channel statemachine. |
901 | * event The event, just happened. |
902 | * arg Generic pointer, casted from channel * upon call. |
903 | */ |
904 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) |
905 | { |
906 | struct channel *ch = arg; |
907 | struct net_device *dev = ch->netdev; |
908 | struct ctcm_priv *priv = dev->ml_priv; |
909 | |
910 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
911 | "%s(%s): RX %s busy, init. fail" , |
912 | CTCM_FUNTAIL, dev->name, ch->id); |
913 | fsm_newstate(fi, newstate: CTC_STATE_RXERR); |
914 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
915 | } |
916 | |
917 | /* |
918 | * Handle RX Unit check remote reset (remote disconnected) |
919 | * |
920 | * fi An instance of a channel statemachine. |
921 | * event The event, just happened. |
922 | * arg Generic pointer, casted from channel * upon call. |
923 | */ |
924 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) |
925 | { |
926 | struct channel *ch = arg; |
927 | struct channel *ch2; |
928 | struct net_device *dev = ch->netdev; |
929 | struct ctcm_priv *priv = dev->ml_priv; |
930 | |
931 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
932 | "%s: %s: remote disconnect - re-init ..." , |
933 | CTCM_FUNTAIL, dev->name); |
934 | fsm_deltimer(timer: &ch->timer); |
935 | /* |
936 | * Notify device statemachine |
937 | */ |
938 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
939 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
940 | |
941 | fsm_newstate(fi, newstate: CTC_STATE_DTERM); |
942 | ch2 = priv->channel[CTCM_WRITE]; |
943 | fsm_newstate(fi: ch2->fsm, newstate: CTC_STATE_DTERM); |
944 | |
945 | ccw_device_halt(ch->cdev, 0); |
946 | ccw_device_halt(ch2->cdev, 0); |
947 | } |
948 | |
949 | /* |
950 | * Handle error during TX channel initialization. |
951 | * |
952 | * fi An instance of a channel statemachine. |
953 | * event The event, just happened. |
954 | * arg Generic pointer, casted from channel * upon call. |
955 | */ |
956 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) |
957 | { |
958 | struct channel *ch = arg; |
959 | struct net_device *dev = ch->netdev; |
960 | struct ctcm_priv *priv = dev->ml_priv; |
961 | |
962 | if (event == CTC_EVENT_TIMER) { |
963 | fsm_deltimer(timer: &ch->timer); |
964 | if (ch->retry++ < 3) |
965 | ctcm_chx_restart(fi, event, arg); |
966 | else { |
967 | fsm_newstate(fi, newstate: CTC_STATE_TXERR); |
968 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
969 | } |
970 | } else { |
971 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
972 | "%s(%s): %s in %s" , CTCM_FUNTAIL, ch->id, |
973 | ctc_ch_event_names[event], fsm_getstate_str(fi)); |
974 | |
975 | dev_warn(&dev->dev, |
976 | "Initialization failed with RX/TX init handshake " |
977 | "error %s\n" , ctc_ch_event_names[event]); |
978 | } |
979 | } |
980 | |
981 | /* |
982 | * Handle TX timeout by retrying operation. |
983 | * |
984 | * fi An instance of a channel statemachine. |
985 | * event The event, just happened. |
986 | * arg Generic pointer, casted from channel * upon call. |
987 | */ |
988 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) |
989 | { |
990 | struct channel *ch = arg; |
991 | struct net_device *dev = ch->netdev; |
992 | struct ctcm_priv *priv = dev->ml_priv; |
993 | struct sk_buff *skb; |
994 | |
995 | CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n" , |
996 | __func__, smp_processor_id(), ch, ch->id); |
997 | |
998 | fsm_deltimer(timer: &ch->timer); |
999 | if (ch->retry++ > 3) { |
1000 | struct mpc_group *gptr = priv->mpcg; |
1001 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1002 | "%s: %s: retries exceeded" , |
1003 | CTCM_FUNTAIL, ch->id); |
1004 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
1005 | /* call restart if not MPC or if MPC and mpcg fsm is ready. |
1006 | use gptr as mpc indicator */ |
1007 | if (!(gptr && (fsm_getstate(fi: gptr->fsm) != MPCG_STATE_READY))) |
1008 | ctcm_chx_restart(fi, event, arg); |
1009 | goto done; |
1010 | } |
1011 | |
1012 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
1013 | "%s : %s: retry %d" , |
1014 | CTCM_FUNTAIL, ch->id, ch->retry); |
1015 | skb = skb_peek(list_: &ch->io_queue); |
1016 | if (skb) { |
1017 | int rc = 0; |
1018 | unsigned long saveflags = 0; |
1019 | clear_normalized_cda(&ch->ccw[4]); |
1020 | ch->ccw[4].count = skb->len; |
1021 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { |
1022 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1023 | "%s: %s: IDAL alloc failed" , |
1024 | CTCM_FUNTAIL, ch->id); |
1025 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
1026 | ctcm_chx_restart(fi, event, arg); |
1027 | goto done; |
1028 | } |
1029 | fsm_addtimer(timer: &ch->timer, millisec: 1000, event: CTC_EVENT_TIMER, arg: ch); |
1030 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ |
1031 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
1032 | /* Such conditional locking is a known problem for |
1033 | * sparse because its undeterministic in static view. |
1034 | * Warnings should be ignored here. */ |
1035 | if (do_debug_ccw) |
1036 | ctcmpc_dumpit((char *)&ch->ccw[3], |
1037 | sizeof(struct ccw1) * 3); |
1038 | |
1039 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], 0, 0xff, 0); |
1040 | if (event == CTC_EVENT_TIMER) |
1041 | spin_unlock_irqrestore(lock: get_ccwdev_lock(ch->cdev), |
1042 | flags: saveflags); |
1043 | if (rc != 0) { |
1044 | fsm_deltimer(timer: &ch->timer); |
1045 | ctcm_ccw_check_rc(ch, rc, msg: "TX in chx_txretry" ); |
1046 | ctcm_purge_skb_queue(q: &ch->io_queue); |
1047 | } |
1048 | } |
1049 | done: |
1050 | return; |
1051 | } |
1052 | |
1053 | /* |
1054 | * Handle fatal errors during an I/O command. |
1055 | * |
1056 | * fi An instance of a channel statemachine. |
1057 | * event The event, just happened. |
1058 | * arg Generic pointer, casted from channel * upon call. |
1059 | */ |
1060 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) |
1061 | { |
1062 | struct channel *ch = arg; |
1063 | struct net_device *dev = ch->netdev; |
1064 | struct ctcm_priv *priv = dev->ml_priv; |
1065 | int rd = CHANNEL_DIRECTION(ch->flags); |
1066 | |
1067 | fsm_deltimer(timer: &ch->timer); |
1068 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
1069 | "%s: %s: %s unrecoverable channel error" , |
1070 | CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX" ); |
1071 | |
1072 | if (IS_MPC(ch)) { |
1073 | priv->stats.tx_dropped++; |
1074 | priv->stats.tx_errors++; |
1075 | } |
1076 | if (rd == CTCM_READ) { |
1077 | fsm_newstate(fi, newstate: CTC_STATE_RXERR); |
1078 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXDOWN, arg: dev); |
1079 | } else { |
1080 | fsm_newstate(fi, newstate: CTC_STATE_TXERR); |
1081 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXDOWN, arg: dev); |
1082 | } |
1083 | } |
1084 | |
1085 | /* |
1086 | * The ctcm statemachine for a channel. |
1087 | */ |
1088 | const fsm_node ch_fsm[] = { |
1089 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, |
1090 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, |
1091 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1092 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
1093 | |
1094 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, |
1095 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, |
1096 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1097 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
1098 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, |
1099 | |
1100 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1101 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, |
1102 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
1103 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, |
1104 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1105 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1106 | |
1107 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1108 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
1109 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1110 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1111 | |
1112 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1113 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, |
1114 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio }, |
1115 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1116 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1117 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
1118 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1119 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1120 | |
1121 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1122 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, |
1123 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle }, |
1124 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, |
1125 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, |
1126 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, |
1127 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, |
1128 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1129 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio }, |
1130 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1131 | |
1132 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1133 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
1134 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx }, |
1135 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, |
1136 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1137 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1138 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx }, |
1139 | |
1140 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1141 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, |
1142 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, |
1143 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, |
1144 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, |
1145 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, |
1146 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1147 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1148 | |
1149 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1150 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
1151 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio }, |
1152 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
1153 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
1154 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1155 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1156 | |
1157 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, |
1158 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, |
1159 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, |
1160 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
1161 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
1162 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1163 | |
1164 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1165 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, |
1166 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
1167 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
1168 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
1169 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1170 | |
1171 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1172 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, |
1173 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone }, |
1174 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry }, |
1175 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry }, |
1176 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, |
1177 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1178 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1179 | |
1180 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1181 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1182 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1183 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1184 | }; |
1185 | |
1186 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); |
1187 | |
1188 | /* |
1189 | * MPC actions for mpc channel statemachine |
1190 | * handling of MPC protocol requires extra |
1191 | * statemachine and actions which are prefixed ctcmpc_ . |
1192 | * The ctc_ch_states and ctc_ch_state_names, |
1193 | * ctc_ch_events and ctc_ch_event_names share the ctcm definitions |
1194 | * which are expanded by some elements. |
1195 | */ |
1196 | |
1197 | /* |
1198 | * Actions for mpc channel statemachine. |
1199 | */ |
1200 | |
1201 | /* |
1202 | * Normal data has been send. Free the corresponding |
1203 | * skb (it's in io_queue), reset dev->tbusy and |
1204 | * revert to idle state. |
1205 | * |
1206 | * fi An instance of a channel statemachine. |
1207 | * event The event, just happened. |
1208 | * arg Generic pointer, casted from channel * upon call. |
1209 | */ |
1210 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) |
1211 | { |
1212 | struct channel *ch = arg; |
1213 | struct net_device *dev = ch->netdev; |
1214 | struct ctcm_priv *priv = dev->ml_priv; |
1215 | struct mpc_group *grp = priv->mpcg; |
1216 | struct sk_buff *skb; |
1217 | int first = 1; |
1218 | int i; |
1219 | __u32 data_space; |
1220 | unsigned long duration; |
1221 | struct sk_buff *peekskb; |
1222 | int rc; |
1223 | struct th_header *; |
1224 | struct pdu *; |
1225 | unsigned long done_stamp = jiffies; |
1226 | |
1227 | CTCM_PR_DEBUG("Enter %s: %s cp:%i\n" , |
1228 | __func__, dev->name, smp_processor_id()); |
1229 | |
1230 | duration = done_stamp - ch->prof.send_stamp; |
1231 | if (duration > ch->prof.tx_time) |
1232 | ch->prof.tx_time = duration; |
1233 | |
1234 | if (ch->irb->scsw.cmd.count != 0) |
1235 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1236 | "%s(%s): TX not complete, remaining %d bytes" , |
1237 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); |
1238 | fsm_deltimer(timer: &ch->timer); |
1239 | while ((skb = skb_dequeue(list: &ch->io_queue))) { |
1240 | priv->stats.tx_packets++; |
1241 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; |
1242 | if (first) { |
1243 | priv->stats.tx_bytes += 2; |
1244 | first = 0; |
1245 | } |
1246 | refcount_dec(r: &skb->users); |
1247 | dev_kfree_skb_irq(skb); |
1248 | } |
1249 | spin_lock(lock: &ch->collect_lock); |
1250 | clear_normalized_cda(&ch->ccw[4]); |
1251 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { |
1252 | spin_unlock(lock: &ch->collect_lock); |
1253 | fsm_newstate(fi, newstate: CTC_STATE_TXIDLE); |
1254 | goto done; |
1255 | } |
1256 | |
1257 | if (ctcm_checkalloc_buffer(ch)) { |
1258 | spin_unlock(lock: &ch->collect_lock); |
1259 | goto done; |
1260 | } |
1261 | ch->trans_skb->data = ch->trans_skb_data; |
1262 | skb_reset_tail_pointer(skb: ch->trans_skb); |
1263 | ch->trans_skb->len = 0; |
1264 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) |
1265 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; |
1266 | if (ch->prof.maxcqueue < skb_queue_len(list_: &ch->collect_queue)) |
1267 | ch->prof.maxcqueue = skb_queue_len(list_: &ch->collect_queue); |
1268 | i = 0; |
1269 | p_header = NULL; |
1270 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; |
1271 | |
1272 | CTCM_PR_DBGDATA("%s: building trans_skb from collect_q" |
1273 | " data_space:%04x\n" , |
1274 | __func__, data_space); |
1275 | |
1276 | while ((skb = skb_dequeue(list: &ch->collect_queue))) { |
1277 | skb_put_data(skb: ch->trans_skb, data: skb->data, len: skb->len); |
1278 | p_header = (struct pdu *) |
1279 | (skb_tail_pointer(skb: ch->trans_skb) - skb->len); |
1280 | p_header->pdu_flag = 0x00; |
1281 | if (be16_to_cpu(skb->protocol) == ETH_P_SNAP) |
1282 | p_header->pdu_flag |= 0x60; |
1283 | else |
1284 | p_header->pdu_flag |= 0x20; |
1285 | |
1286 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n" , |
1287 | __func__, ch->trans_skb->len); |
1288 | CTCM_PR_DBGDATA("%s: pdu header and data for up" |
1289 | " to 32 bytes sent to vtam\n" , __func__); |
1290 | CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32)); |
1291 | |
1292 | ch->collect_len -= skb->len; |
1293 | data_space -= skb->len; |
1294 | priv->stats.tx_packets++; |
1295 | priv->stats.tx_bytes += skb->len; |
1296 | refcount_dec(r: &skb->users); |
1297 | dev_kfree_skb_any(skb); |
1298 | peekskb = skb_peek(list_: &ch->collect_queue); |
1299 | if (peekskb->len > data_space) |
1300 | break; |
1301 | i++; |
1302 | } |
1303 | /* p_header points to the last one we handled */ |
1304 | if (p_header) |
1305 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ |
1306 | |
1307 | header = skb_push(skb: ch->trans_skb, TH_HEADER_LENGTH); |
1308 | memset(header, 0, TH_HEADER_LENGTH); |
1309 | |
1310 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ |
1311 | ch->th_seq_num++; |
1312 | header->th_seq_num = ch->th_seq_num; |
1313 | |
1314 | CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" , |
1315 | __func__, ch->th_seq_num); |
1316 | |
1317 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n" , |
1318 | __func__, ch->trans_skb->len); |
1319 | CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb " |
1320 | "data to vtam from collect_q\n" , __func__); |
1321 | CTCM_D3_DUMP((char *)ch->trans_skb->data, |
1322 | min_t(int, ch->trans_skb->len, 50)); |
1323 | |
1324 | spin_unlock(lock: &ch->collect_lock); |
1325 | clear_normalized_cda(&ch->ccw[1]); |
1326 | |
1327 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n" , |
1328 | (void *)(unsigned long)ch->ccw[1].cda, |
1329 | ch->trans_skb->data); |
1330 | ch->ccw[1].count = ch->max_bufsize; |
1331 | |
1332 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { |
1333 | dev_kfree_skb_any(skb: ch->trans_skb); |
1334 | ch->trans_skb = NULL; |
1335 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR, |
1336 | "%s: %s: IDAL alloc failed" , |
1337 | CTCM_FUNTAIL, ch->id); |
1338 | fsm_event(fi: priv->mpcg->fsm, event: MPCG_EVENT_INOP, arg: dev); |
1339 | return; |
1340 | } |
1341 | |
1342 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n" , |
1343 | (void *)(unsigned long)ch->ccw[1].cda, |
1344 | ch->trans_skb->data); |
1345 | |
1346 | ch->ccw[1].count = ch->trans_skb->len; |
1347 | fsm_addtimer(timer: &ch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: ch); |
1348 | ch->prof.send_stamp = jiffies; |
1349 | if (do_debug_ccw) |
1350 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
1351 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
1352 | ch->prof.doios_multi++; |
1353 | if (rc != 0) { |
1354 | priv->stats.tx_dropped += i; |
1355 | priv->stats.tx_errors += i; |
1356 | fsm_deltimer(timer: &ch->timer); |
1357 | ctcm_ccw_check_rc(ch, rc, msg: "chained TX" ); |
1358 | } |
1359 | done: |
1360 | ctcm_clear_busy(dev); |
1361 | return; |
1362 | } |
1363 | |
1364 | /* |
1365 | * Got normal data, check for sanity, queue it up, allocate new buffer |
1366 | * trigger bottom half, and initiate next read. |
1367 | * |
1368 | * fi An instance of a channel statemachine. |
1369 | * event The event, just happened. |
1370 | * arg Generic pointer, casted from channel * upon call. |
1371 | */ |
1372 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) |
1373 | { |
1374 | struct channel *ch = arg; |
1375 | struct net_device *dev = ch->netdev; |
1376 | struct ctcm_priv *priv = dev->ml_priv; |
1377 | struct mpc_group *grp = priv->mpcg; |
1378 | struct sk_buff *skb = ch->trans_skb; |
1379 | struct sk_buff *new_skb; |
1380 | unsigned long saveflags = 0; /* avoids compiler warning */ |
1381 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
1382 | |
1383 | CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n" , |
1384 | CTCM_FUNTAIL, dev->name, smp_processor_id(), |
1385 | ch->id, ch->max_bufsize, len); |
1386 | fsm_deltimer(timer: &ch->timer); |
1387 | |
1388 | if (skb == NULL) { |
1389 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1390 | "%s(%s): TRANS_SKB = NULL" , |
1391 | CTCM_FUNTAIL, dev->name); |
1392 | goto again; |
1393 | } |
1394 | |
1395 | if (len < TH_HEADER_LENGTH) { |
1396 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1397 | "%s(%s): packet length %d too short" , |
1398 | CTCM_FUNTAIL, dev->name, len); |
1399 | priv->stats.rx_dropped++; |
1400 | priv->stats.rx_length_errors++; |
1401 | } else { |
1402 | /* must have valid th header or game over */ |
1403 | __u32 block_len = len; |
1404 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; |
1405 | new_skb = __dev_alloc_skb(length: ch->max_bufsize, GFP_ATOMIC); |
1406 | |
1407 | if (new_skb == NULL) { |
1408 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1409 | "%s(%s): skb allocation failed" , |
1410 | CTCM_FUNTAIL, dev->name); |
1411 | fsm_event(fi: priv->mpcg->fsm, event: MPCG_EVENT_INOP, arg: dev); |
1412 | goto again; |
1413 | } |
1414 | switch (fsm_getstate(fi: grp->fsm)) { |
1415 | case MPCG_STATE_RESET: |
1416 | case MPCG_STATE_INOP: |
1417 | dev_kfree_skb_any(skb: new_skb); |
1418 | break; |
1419 | case MPCG_STATE_FLOWC: |
1420 | case MPCG_STATE_READY: |
1421 | skb_put_data(skb: new_skb, data: skb->data, len: block_len); |
1422 | skb_queue_tail(list: &ch->io_queue, newsk: new_skb); |
1423 | tasklet_schedule(t: &ch->ch_tasklet); |
1424 | break; |
1425 | default: |
1426 | skb_put_data(skb: new_skb, data: skb->data, len); |
1427 | skb_queue_tail(list: &ch->io_queue, newsk: new_skb); |
1428 | tasklet_hi_schedule(t: &ch->ch_tasklet); |
1429 | break; |
1430 | } |
1431 | } |
1432 | |
1433 | again: |
1434 | switch (fsm_getstate(fi: grp->fsm)) { |
1435 | int rc, dolock; |
1436 | case MPCG_STATE_FLOWC: |
1437 | case MPCG_STATE_READY: |
1438 | if (ctcm_checkalloc_buffer(ch)) |
1439 | break; |
1440 | ch->trans_skb->data = ch->trans_skb_data; |
1441 | skb_reset_tail_pointer(skb: ch->trans_skb); |
1442 | ch->trans_skb->len = 0; |
1443 | ch->ccw[1].count = ch->max_bufsize; |
1444 | if (do_debug_ccw) |
1445 | ctcmpc_dumpit((char *)&ch->ccw[0], |
1446 | sizeof(struct ccw1) * 3); |
1447 | dolock = !in_hardirq(); |
1448 | if (dolock) |
1449 | spin_lock_irqsave( |
1450 | get_ccwdev_lock(ch->cdev), saveflags); |
1451 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
1452 | if (dolock) /* see remark about conditional locking */ |
1453 | spin_unlock_irqrestore( |
1454 | lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
1455 | if (rc != 0) |
1456 | ctcm_ccw_check_rc(ch, rc, msg: "normal RX" ); |
1457 | break; |
1458 | default: |
1459 | break; |
1460 | } |
1461 | |
1462 | CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n" , |
1463 | __func__, dev->name, ch, ch->id); |
1464 | |
1465 | } |
1466 | |
1467 | /* |
1468 | * Initialize connection by sending a __u16 of value 0. |
1469 | * |
1470 | * fi An instance of a channel statemachine. |
1471 | * event The event, just happened. |
1472 | * arg Generic pointer, casted from channel * upon call. |
1473 | */ |
1474 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) |
1475 | { |
1476 | struct channel *ch = arg; |
1477 | struct net_device *dev = ch->netdev; |
1478 | struct ctcm_priv *priv = dev->ml_priv; |
1479 | struct mpc_group *gptr = priv->mpcg; |
1480 | |
1481 | CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n" , |
1482 | __func__, ch->id, ch); |
1483 | |
1484 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, |
1485 | "%s: %s: chstate:%i, grpstate:%i, prot:%i\n" , |
1486 | CTCM_FUNTAIL, ch->id, fsm_getstate(fi), |
1487 | fsm_getstate(gptr->fsm), ch->protocol); |
1488 | |
1489 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) |
1490 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? " ); |
1491 | |
1492 | fsm_deltimer(timer: &ch->timer); |
1493 | if (ctcm_checkalloc_buffer(ch)) |
1494 | goto done; |
1495 | |
1496 | switch (fsm_getstate(fi)) { |
1497 | case CTC_STATE_STARTRETRY: |
1498 | case CTC_STATE_SETUPWAIT: |
1499 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
1500 | ctcmpc_chx_rxidle(fi, event, arg); |
1501 | } else { |
1502 | fsm_newstate(fi, newstate: CTC_STATE_TXIDLE); |
1503 | fsm_event(fi: priv->fsm, event: DEV_EVENT_TXUP, arg: dev); |
1504 | } |
1505 | goto done; |
1506 | default: |
1507 | break; |
1508 | } |
1509 | |
1510 | fsm_newstate(fi, newstate: (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
1511 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
1512 | |
1513 | done: |
1514 | CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n" , |
1515 | __func__, ch->id, ch); |
1516 | return; |
1517 | } |
1518 | |
1519 | /* |
1520 | * Got initial data, check it. If OK, |
1521 | * notify device statemachine that we are up and |
1522 | * running. |
1523 | * |
1524 | * fi An instance of a channel statemachine. |
1525 | * event The event, just happened. |
1526 | * arg Generic pointer, casted from channel * upon call. |
1527 | */ |
1528 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) |
1529 | { |
1530 | struct channel *ch = arg; |
1531 | struct net_device *dev = ch->netdev; |
1532 | struct ctcm_priv *priv = dev->ml_priv; |
1533 | struct mpc_group *grp = priv->mpcg; |
1534 | int rc; |
1535 | unsigned long saveflags = 0; /* avoids compiler warning */ |
1536 | |
1537 | fsm_deltimer(timer: &ch->timer); |
1538 | CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n" , |
1539 | __func__, ch->id, dev->name, smp_processor_id(), |
1540 | fsm_getstate(fi), fsm_getstate(grp->fsm)); |
1541 | |
1542 | fsm_newstate(fi, newstate: CTC_STATE_RXIDLE); |
1543 | /* XID processing complete */ |
1544 | |
1545 | switch (fsm_getstate(fi: grp->fsm)) { |
1546 | case MPCG_STATE_FLOWC: |
1547 | case MPCG_STATE_READY: |
1548 | if (ctcm_checkalloc_buffer(ch)) |
1549 | goto done; |
1550 | ch->trans_skb->data = ch->trans_skb_data; |
1551 | skb_reset_tail_pointer(skb: ch->trans_skb); |
1552 | ch->trans_skb->len = 0; |
1553 | ch->ccw[1].count = ch->max_bufsize; |
1554 | CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
1555 | if (event == CTC_EVENT_START) |
1556 | /* see remark about conditional locking */ |
1557 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
1558 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0); |
1559 | if (event == CTC_EVENT_START) |
1560 | spin_unlock_irqrestore( |
1561 | lock: get_ccwdev_lock(ch->cdev), flags: saveflags); |
1562 | if (rc != 0) { |
1563 | fsm_newstate(fi, newstate: CTC_STATE_RXINIT); |
1564 | ctcm_ccw_check_rc(ch, rc, msg: "initial RX" ); |
1565 | goto done; |
1566 | } |
1567 | break; |
1568 | default: |
1569 | break; |
1570 | } |
1571 | |
1572 | fsm_event(fi: priv->fsm, event: DEV_EVENT_RXUP, arg: dev); |
1573 | done: |
1574 | return; |
1575 | } |
1576 | |
1577 | /* |
1578 | * ctcmpc channel FSM action |
1579 | * called from several points in ctcmpc_ch_fsm |
1580 | * ctcmpc only |
1581 | */ |
1582 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) |
1583 | { |
1584 | struct channel *ch = arg; |
1585 | struct net_device *dev = ch->netdev; |
1586 | struct ctcm_priv *priv = dev->ml_priv; |
1587 | struct mpc_group *grp = priv->mpcg; |
1588 | |
1589 | CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n" , |
1590 | __func__, dev->name, ch->id, ch, smp_processor_id(), |
1591 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); |
1592 | |
1593 | switch (fsm_getstate(fi: grp->fsm)) { |
1594 | case MPCG_STATE_XID2INITW: |
1595 | /* ok..start yside xid exchanges */ |
1596 | if (!ch->in_mpcgroup) |
1597 | break; |
1598 | if (fsm_getstate(fi: ch->fsm) == CH_XID0_PENDING) { |
1599 | fsm_deltimer(timer: &grp->timer); |
1600 | fsm_addtimer(timer: &grp->timer, |
1601 | MPC_XID_TIMEOUT_VALUE, |
1602 | event: MPCG_EVENT_TIMER, arg: dev); |
1603 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_XID0DO, arg: ch); |
1604 | |
1605 | } else if (fsm_getstate(fi: ch->fsm) < CH_XID7_PENDING1) |
1606 | /* attn rcvd before xid0 processed via bh */ |
1607 | fsm_newstate(fi: ch->fsm, newstate: CH_XID7_PENDING1); |
1608 | break; |
1609 | case MPCG_STATE_XID2INITX: |
1610 | case MPCG_STATE_XID0IOWAIT: |
1611 | case MPCG_STATE_XID0IOWAIX: |
1612 | /* attn rcvd before xid0 processed on ch |
1613 | but mid-xid0 processing for group */ |
1614 | if (fsm_getstate(fi: ch->fsm) < CH_XID7_PENDING1) |
1615 | fsm_newstate(fi: ch->fsm, newstate: CH_XID7_PENDING1); |
1616 | break; |
1617 | case MPCG_STATE_XID7INITW: |
1618 | case MPCG_STATE_XID7INITX: |
1619 | case MPCG_STATE_XID7INITI: |
1620 | case MPCG_STATE_XID7INITZ: |
1621 | switch (fsm_getstate(fi: ch->fsm)) { |
1622 | case CH_XID7_PENDING: |
1623 | fsm_newstate(fi: ch->fsm, newstate: CH_XID7_PENDING1); |
1624 | break; |
1625 | case CH_XID7_PENDING2: |
1626 | fsm_newstate(fi: ch->fsm, newstate: CH_XID7_PENDING3); |
1627 | break; |
1628 | } |
1629 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_XID7DONE, arg: dev); |
1630 | break; |
1631 | } |
1632 | |
1633 | return; |
1634 | } |
1635 | |
1636 | /* |
1637 | * ctcmpc channel FSM action |
1638 | * called from one point in ctcmpc_ch_fsm |
1639 | * ctcmpc only |
1640 | */ |
1641 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) |
1642 | { |
1643 | struct channel *ch = arg; |
1644 | struct net_device *dev = ch->netdev; |
1645 | struct ctcm_priv *priv = dev->ml_priv; |
1646 | struct mpc_group *grp = priv->mpcg; |
1647 | |
1648 | CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n" , |
1649 | __func__, dev->name, ch->id, |
1650 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); |
1651 | |
1652 | fsm_deltimer(timer: &ch->timer); |
1653 | |
1654 | switch (fsm_getstate(fi: grp->fsm)) { |
1655 | case MPCG_STATE_XID0IOWAIT: |
1656 | /* vtam wants to be primary.start yside xid exchanges*/ |
1657 | /* only receive one attn-busy at a time so must not */ |
1658 | /* change state each time */ |
1659 | grp->changed_side = 1; |
1660 | fsm_newstate(fi: grp->fsm, newstate: MPCG_STATE_XID2INITW); |
1661 | break; |
1662 | case MPCG_STATE_XID2INITW: |
1663 | if (grp->changed_side == 1) { |
1664 | grp->changed_side = 2; |
1665 | break; |
1666 | } |
1667 | /* process began via call to establish_conn */ |
1668 | /* so must report failure instead of reverting */ |
1669 | /* back to ready-for-xid passive state */ |
1670 | if (grp->estconnfunc) |
1671 | goto done; |
1672 | /* this attnbusy is NOT the result of xside xid */ |
1673 | /* collisions so yside must have been triggered */ |
1674 | /* by an ATTN that was not intended to start XID */ |
1675 | /* processing. Revert back to ready-for-xid and */ |
1676 | /* wait for ATTN interrupt to signal xid start */ |
1677 | if (fsm_getstate(fi: ch->fsm) == CH_XID0_INPROGRESS) { |
1678 | fsm_newstate(fi: ch->fsm, newstate: CH_XID0_PENDING) ; |
1679 | fsm_deltimer(timer: &grp->timer); |
1680 | goto done; |
1681 | } |
1682 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_INOP, arg: dev); |
1683 | goto done; |
1684 | case MPCG_STATE_XID2INITX: |
1685 | /* XID2 was received before ATTN Busy for second |
1686 | channel.Send yside xid for second channel. |
1687 | */ |
1688 | if (grp->changed_side == 1) { |
1689 | grp->changed_side = 2; |
1690 | break; |
1691 | } |
1692 | fallthrough; |
1693 | case MPCG_STATE_XID0IOWAIX: |
1694 | case MPCG_STATE_XID7INITW: |
1695 | case MPCG_STATE_XID7INITX: |
1696 | case MPCG_STATE_XID7INITI: |
1697 | case MPCG_STATE_XID7INITZ: |
1698 | default: |
1699 | /* multiple attn-busy indicates too out-of-sync */ |
1700 | /* and they are certainly not being received as part */ |
1701 | /* of valid mpc group negotiations.. */ |
1702 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_INOP, arg: dev); |
1703 | goto done; |
1704 | } |
1705 | |
1706 | if (grp->changed_side == 1) { |
1707 | fsm_deltimer(timer: &grp->timer); |
1708 | fsm_addtimer(timer: &grp->timer, MPC_XID_TIMEOUT_VALUE, |
1709 | event: MPCG_EVENT_TIMER, arg: dev); |
1710 | } |
1711 | if (ch->in_mpcgroup) |
1712 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_XID0DO, arg: ch); |
1713 | else |
1714 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1715 | "%s(%s): channel %s not added to group" , |
1716 | CTCM_FUNTAIL, dev->name, ch->id); |
1717 | |
1718 | done: |
1719 | return; |
1720 | } |
1721 | |
1722 | /* |
1723 | * ctcmpc channel FSM action |
1724 | * called from several points in ctcmpc_ch_fsm |
1725 | * ctcmpc only |
1726 | */ |
1727 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) |
1728 | { |
1729 | struct channel *ch = arg; |
1730 | struct net_device *dev = ch->netdev; |
1731 | struct ctcm_priv *priv = dev->ml_priv; |
1732 | struct mpc_group *grp = priv->mpcg; |
1733 | |
1734 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_XID0DO, arg: ch); |
1735 | return; |
1736 | } |
1737 | |
1738 | /* |
1739 | * ctcmpc channel FSM action |
1740 | * called from several points in ctcmpc_ch_fsm |
1741 | * ctcmpc only |
1742 | */ |
1743 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) |
1744 | { |
1745 | struct channel *ach = arg; |
1746 | struct net_device *dev = ach->netdev; |
1747 | struct ctcm_priv *priv = dev->ml_priv; |
1748 | struct mpc_group *grp = priv->mpcg; |
1749 | struct channel *wch = priv->channel[CTCM_WRITE]; |
1750 | struct channel *rch = priv->channel[CTCM_READ]; |
1751 | struct sk_buff *skb; |
1752 | struct th_sweep *; |
1753 | int rc = 0; |
1754 | unsigned long saveflags = 0; |
1755 | |
1756 | CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n" , |
1757 | __func__, smp_processor_id(), ach, ach->id); |
1758 | |
1759 | if (grp->in_sweep == 0) |
1760 | goto done; |
1761 | |
1762 | CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" , |
1763 | __func__, wch->th_seq_num); |
1764 | CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" , |
1765 | __func__, rch->th_seq_num); |
1766 | |
1767 | if (fsm_getstate(fi: wch->fsm) != CTC_STATE_TXIDLE) { |
1768 | /* give the previous IO time to complete */ |
1769 | fsm_addtimer(timer: &wch->sweep_timer, |
1770 | millisec: 200, event: CTC_EVENT_RSWEEP_TIMER, arg: wch); |
1771 | goto done; |
1772 | } |
1773 | |
1774 | skb = skb_dequeue(list: &wch->sweep_queue); |
1775 | if (!skb) |
1776 | goto done; |
1777 | |
1778 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { |
1779 | grp->in_sweep = 0; |
1780 | ctcm_clear_busy_do(dev); |
1781 | dev_kfree_skb_any(skb); |
1782 | fsm_event(fi: grp->fsm, event: MPCG_EVENT_INOP, arg: dev); |
1783 | goto done; |
1784 | } else { |
1785 | refcount_inc(r: &skb->users); |
1786 | skb_queue_tail(list: &wch->io_queue, newsk: skb); |
1787 | } |
1788 | |
1789 | /* send out the sweep */ |
1790 | wch->ccw[4].count = skb->len; |
1791 | |
1792 | header = (struct th_sweep *)skb->data; |
1793 | switch (header->th.th_ch_flag) { |
1794 | case TH_SWEEP_REQ: |
1795 | grp->sweep_req_pend_num--; |
1796 | break; |
1797 | case TH_SWEEP_RESP: |
1798 | grp->sweep_rsp_pend_num--; |
1799 | break; |
1800 | } |
1801 | |
1802 | header->sw.th_last_seq = wch->th_seq_num; |
1803 | |
1804 | CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); |
1805 | CTCM_PR_DBGDATA("%s: sweep packet\n" , __func__); |
1806 | CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH); |
1807 | |
1808 | fsm_addtimer(timer: &wch->timer, CTCM_TIME_5_SEC, event: CTC_EVENT_TIMER, arg: wch); |
1809 | fsm_newstate(fi: wch->fsm, newstate: CTC_STATE_TX); |
1810 | |
1811 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); |
1812 | wch->prof.send_stamp = jiffies; |
1813 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], 0, 0xff, 0); |
1814 | spin_unlock_irqrestore(lock: get_ccwdev_lock(wch->cdev), flags: saveflags); |
1815 | |
1816 | if ((grp->sweep_req_pend_num == 0) && |
1817 | (grp->sweep_rsp_pend_num == 0)) { |
1818 | grp->in_sweep = 0; |
1819 | rch->th_seq_num = 0x00; |
1820 | wch->th_seq_num = 0x00; |
1821 | ctcm_clear_busy_do(dev); |
1822 | } |
1823 | |
1824 | CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" , |
1825 | __func__, wch->th_seq_num, rch->th_seq_num); |
1826 | |
1827 | if (rc != 0) |
1828 | ctcm_ccw_check_rc(ch: wch, rc, msg: "send sweep" ); |
1829 | |
1830 | done: |
1831 | return; |
1832 | } |
1833 | |
1834 | |
1835 | /* |
1836 | * The ctcmpc statemachine for a channel. |
1837 | */ |
1838 | |
1839 | const fsm_node ctcmpc_ch_fsm[] = { |
1840 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, |
1841 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, |
1842 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1843 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1844 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
1845 | |
1846 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, |
1847 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, |
1848 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1849 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
1850 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, |
1851 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, |
1852 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, |
1853 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1854 | |
1855 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1856 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, |
1857 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
1858 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, |
1859 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1860 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1861 | |
1862 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1863 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
1864 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
1865 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1866 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1867 | |
1868 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1869 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, |
1870 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, |
1871 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1872 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1873 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
1874 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1875 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1876 | |
1877 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1878 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, |
1879 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, |
1880 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, |
1881 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, |
1882 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, |
1883 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, |
1884 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1885 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, |
1886 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1887 | |
1888 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
1889 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1890 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1891 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, |
1892 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1893 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1894 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1895 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1896 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1897 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1898 | |
1899 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1900 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1901 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1902 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, |
1903 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1904 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1905 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1906 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1907 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, |
1908 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1909 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1910 | |
1911 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1912 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1913 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1914 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, |
1915 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1916 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1917 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1918 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1919 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1920 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1921 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1922 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1923 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1924 | |
1925 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1926 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1927 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1928 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, |
1929 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1930 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1931 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1932 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1933 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1934 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1935 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1936 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1937 | |
1938 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1939 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1940 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1941 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, |
1942 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1943 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1944 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1945 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1946 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1947 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1948 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1949 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1950 | |
1951 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1952 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1953 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1954 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, |
1955 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1956 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1957 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1958 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1959 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1960 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1961 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1962 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1963 | |
1964 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1965 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
1966 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1967 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, |
1968 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1969 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1970 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1971 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
1972 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
1973 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
1974 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
1975 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
1976 | |
1977 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1978 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
1979 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
1980 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, |
1981 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
1982 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1983 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1984 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
1985 | |
1986 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1987 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, |
1988 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, |
1989 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, |
1990 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, |
1991 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, |
1992 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
1993 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
1994 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
1995 | |
1996 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
1997 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
1998 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, |
1999 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, |
2000 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
2001 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
2002 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2003 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
2004 | |
2005 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, |
2006 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, |
2007 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, |
2008 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
2009 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
2010 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2011 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
2012 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
2013 | |
2014 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, |
2015 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, |
2016 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
2017 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
2018 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
2019 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2020 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
2021 | |
2022 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, |
2023 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, |
2024 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, |
2025 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, |
2026 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
2027 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, |
2028 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
2029 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2030 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
2031 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
2032 | |
2033 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
2034 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
2035 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
2036 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2037 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
2038 | }; |
2039 | |
2040 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); |
2041 | |
2042 | /* |
2043 | * Actions for interface - statemachine. |
2044 | */ |
2045 | |
2046 | /* |
2047 | * Startup channels by sending CTC_EVENT_START to each channel. |
2048 | * |
2049 | * fi An instance of an interface statemachine. |
2050 | * event The event, just happened. |
2051 | * arg Generic pointer, casted from struct net_device * upon call. |
2052 | */ |
2053 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
2054 | { |
2055 | struct net_device *dev = arg; |
2056 | struct ctcm_priv *priv = dev->ml_priv; |
2057 | int direction; |
2058 | |
2059 | CTCMY_DBF_DEV_NAME(SETUP, dev, "" ); |
2060 | |
2061 | fsm_deltimer(timer: &priv->restart_timer); |
2062 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_RXTX); |
2063 | if (IS_MPC(priv)) |
2064 | priv->mpcg->channels_terminating = 0; |
2065 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
2066 | struct channel *ch = priv->channel[direction]; |
2067 | fsm_event(fi: ch->fsm, event: CTC_EVENT_START, arg: ch); |
2068 | } |
2069 | } |
2070 | |
2071 | /* |
2072 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. |
2073 | * |
2074 | * fi An instance of an interface statemachine. |
2075 | * event The event, just happened. |
2076 | * arg Generic pointer, casted from struct net_device * upon call. |
2077 | */ |
2078 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) |
2079 | { |
2080 | int direction; |
2081 | struct net_device *dev = arg; |
2082 | struct ctcm_priv *priv = dev->ml_priv; |
2083 | |
2084 | CTCMY_DBF_DEV_NAME(SETUP, dev, "" ); |
2085 | |
2086 | fsm_newstate(fi, newstate: DEV_STATE_STOPWAIT_RXTX); |
2087 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
2088 | struct channel *ch = priv->channel[direction]; |
2089 | fsm_event(fi: ch->fsm, event: CTC_EVENT_STOP, arg: ch); |
2090 | ch->th_seq_num = 0x00; |
2091 | CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n" , |
2092 | __func__, ch->th_seq_num); |
2093 | } |
2094 | if (IS_MPC(priv)) |
2095 | fsm_newstate(fi: priv->mpcg->fsm, newstate: MPCG_STATE_RESET); |
2096 | } |
2097 | |
2098 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) |
2099 | { |
2100 | int restart_timer; |
2101 | struct net_device *dev = arg; |
2102 | struct ctcm_priv *priv = dev->ml_priv; |
2103 | |
2104 | CTCMY_DBF_DEV_NAME(TRACE, dev, "" ); |
2105 | |
2106 | if (IS_MPC(priv)) { |
2107 | restart_timer = CTCM_TIME_1_SEC; |
2108 | } else { |
2109 | restart_timer = CTCM_TIME_5_SEC; |
2110 | } |
2111 | dev_info(&dev->dev, "Restarting device\n" ); |
2112 | |
2113 | dev_action_stop(fi, event, arg); |
2114 | fsm_event(fi: priv->fsm, event: DEV_EVENT_STOP, arg: dev); |
2115 | if (IS_MPC(priv)) |
2116 | fsm_newstate(fi: priv->mpcg->fsm, newstate: MPCG_STATE_RESET); |
2117 | |
2118 | /* going back into start sequence too quickly can */ |
2119 | /* result in the other side becoming unreachable due */ |
2120 | /* to sense reported when IO is aborted */ |
2121 | fsm_addtimer(timer: &priv->restart_timer, millisec: restart_timer, |
2122 | event: DEV_EVENT_START, arg: dev); |
2123 | } |
2124 | |
2125 | /* |
2126 | * Called from channel statemachine |
2127 | * when a channel is up and running. |
2128 | * |
2129 | * fi An instance of an interface statemachine. |
2130 | * event The event, just happened. |
2131 | * arg Generic pointer, casted from struct net_device * upon call. |
2132 | */ |
2133 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) |
2134 | { |
2135 | struct net_device *dev = arg; |
2136 | struct ctcm_priv *priv = dev->ml_priv; |
2137 | int dev_stat = fsm_getstate(fi); |
2138 | |
2139 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
2140 | "%s(%s): priv = %p [%d,%d]\n " , CTCM_FUNTAIL, |
2141 | dev->name, dev->ml_priv, dev_stat, event); |
2142 | |
2143 | switch (fsm_getstate(fi)) { |
2144 | case DEV_STATE_STARTWAIT_RXTX: |
2145 | if (event == DEV_EVENT_RXUP) |
2146 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_TX); |
2147 | else |
2148 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_RX); |
2149 | break; |
2150 | case DEV_STATE_STARTWAIT_RX: |
2151 | if (event == DEV_EVENT_RXUP) { |
2152 | fsm_newstate(fi, newstate: DEV_STATE_RUNNING); |
2153 | dev_info(&dev->dev, |
2154 | "Connected with remote side\n" ); |
2155 | ctcm_clear_busy(dev); |
2156 | } |
2157 | break; |
2158 | case DEV_STATE_STARTWAIT_TX: |
2159 | if (event == DEV_EVENT_TXUP) { |
2160 | fsm_newstate(fi, newstate: DEV_STATE_RUNNING); |
2161 | dev_info(&dev->dev, |
2162 | "Connected with remote side\n" ); |
2163 | ctcm_clear_busy(dev); |
2164 | } |
2165 | break; |
2166 | case DEV_STATE_STOPWAIT_TX: |
2167 | if (event == DEV_EVENT_RXUP) |
2168 | fsm_newstate(fi, newstate: DEV_STATE_STOPWAIT_RXTX); |
2169 | break; |
2170 | case DEV_STATE_STOPWAIT_RX: |
2171 | if (event == DEV_EVENT_TXUP) |
2172 | fsm_newstate(fi, newstate: DEV_STATE_STOPWAIT_RXTX); |
2173 | break; |
2174 | } |
2175 | |
2176 | if (IS_MPC(priv)) { |
2177 | if (event == DEV_EVENT_RXUP) |
2178 | mpc_channel_action(ch: priv->channel[CTCM_READ], |
2179 | CTCM_READ, MPC_CHANNEL_ADD); |
2180 | else |
2181 | mpc_channel_action(ch: priv->channel[CTCM_WRITE], |
2182 | CTCM_WRITE, MPC_CHANNEL_ADD); |
2183 | } |
2184 | } |
2185 | |
2186 | /* |
2187 | * Called from device statemachine |
2188 | * when a channel has been shutdown. |
2189 | * |
2190 | * fi An instance of an interface statemachine. |
2191 | * event The event, just happened. |
2192 | * arg Generic pointer, casted from struct net_device * upon call. |
2193 | */ |
2194 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) |
2195 | { |
2196 | |
2197 | struct net_device *dev = arg; |
2198 | struct ctcm_priv *priv = dev->ml_priv; |
2199 | |
2200 | CTCMY_DBF_DEV_NAME(SETUP, dev, "" ); |
2201 | |
2202 | switch (fsm_getstate(fi)) { |
2203 | case DEV_STATE_RUNNING: |
2204 | if (event == DEV_EVENT_TXDOWN) |
2205 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_TX); |
2206 | else |
2207 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_RX); |
2208 | break; |
2209 | case DEV_STATE_STARTWAIT_RX: |
2210 | if (event == DEV_EVENT_TXDOWN) |
2211 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_RXTX); |
2212 | break; |
2213 | case DEV_STATE_STARTWAIT_TX: |
2214 | if (event == DEV_EVENT_RXDOWN) |
2215 | fsm_newstate(fi, newstate: DEV_STATE_STARTWAIT_RXTX); |
2216 | break; |
2217 | case DEV_STATE_STOPWAIT_RXTX: |
2218 | if (event == DEV_EVENT_TXDOWN) |
2219 | fsm_newstate(fi, newstate: DEV_STATE_STOPWAIT_RX); |
2220 | else |
2221 | fsm_newstate(fi, newstate: DEV_STATE_STOPWAIT_TX); |
2222 | break; |
2223 | case DEV_STATE_STOPWAIT_RX: |
2224 | if (event == DEV_EVENT_RXDOWN) |
2225 | fsm_newstate(fi, newstate: DEV_STATE_STOPPED); |
2226 | break; |
2227 | case DEV_STATE_STOPWAIT_TX: |
2228 | if (event == DEV_EVENT_TXDOWN) |
2229 | fsm_newstate(fi, newstate: DEV_STATE_STOPPED); |
2230 | break; |
2231 | } |
2232 | if (IS_MPC(priv)) { |
2233 | if (event == DEV_EVENT_RXDOWN) |
2234 | mpc_channel_action(ch: priv->channel[CTCM_READ], |
2235 | CTCM_READ, MPC_CHANNEL_REMOVE); |
2236 | else |
2237 | mpc_channel_action(ch: priv->channel[CTCM_WRITE], |
2238 | CTCM_WRITE, MPC_CHANNEL_REMOVE); |
2239 | } |
2240 | } |
2241 | |
2242 | const fsm_node dev_fsm[] = { |
2243 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, |
2244 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, |
2245 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
2246 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
2247 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, |
2248 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, |
2249 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, |
2250 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, |
2251 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
2252 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, |
2253 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, |
2254 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, |
2255 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, |
2256 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
2257 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, |
2258 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, |
2259 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, |
2260 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, |
2261 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
2262 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
2263 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, |
2264 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, |
2265 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, |
2266 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, |
2267 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
2268 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, |
2269 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, |
2270 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, |
2271 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, |
2272 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
2273 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, |
2274 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, |
2275 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, |
2276 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, |
2277 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, |
2278 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, |
2279 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, |
2280 | }; |
2281 | |
2282 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); |
2283 | |
2284 | /* --- This is the END my friend --- */ |
2285 | |
2286 | |