1 | /* |
2 | * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver. |
3 | * |
4 | * Copyright (c) 2006 - 2013 Broadcom Corporation |
5 | * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. |
6 | * Copyright (c) 2007, 2008 Mike Christie |
7 | * Copyright (c) 2014, QLogic Corporation |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation. |
12 | * |
13 | * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) |
14 | * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) |
15 | * Maintained by: QLogic-Storage-Upstream@qlogic.com |
16 | */ |
17 | |
18 | #include <linux/slab.h> |
19 | #include <scsi/scsi_tcq.h> |
20 | #include <scsi/libiscsi.h> |
21 | #include "bnx2i.h" |
22 | |
23 | struct scsi_transport_template *bnx2i_scsi_xport_template; |
24 | struct iscsi_transport bnx2i_iscsi_transport; |
25 | static const struct scsi_host_template bnx2i_host_template; |
26 | |
27 | /* |
28 | * Global endpoint resource info |
29 | */ |
30 | static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ |
31 | |
32 | DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); |
33 | |
34 | static int bnx2i_adapter_ready(struct bnx2i_hba *hba) |
35 | { |
36 | int retval = 0; |
37 | |
38 | if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || |
39 | test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || |
40 | test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) |
41 | retval = -EPERM; |
42 | return retval; |
43 | } |
44 | |
45 | /** |
46 | * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks |
47 | * @cmd: iscsi cmd struct pointer |
48 | * @buf_off: absolute buffer offset |
49 | * @start_bd_off: u32 pointer to return the offset within the BD |
50 | * indicated by 'start_bd_idx' on which 'buf_off' falls |
51 | * @start_bd_idx: index of the BD on which 'buf_off' falls |
52 | * |
53 | * identifies & marks various bd info for scsi command's imm data, |
54 | * unsolicited data and the first solicited data seq. |
55 | */ |
56 | static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, |
57 | u32 *start_bd_off, u32 *start_bd_idx) |
58 | { |
59 | struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; |
60 | u32 cur_offset = 0; |
61 | u32 cur_bd_idx = 0; |
62 | |
63 | if (buf_off) { |
64 | while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { |
65 | cur_offset += bd_tbl->buffer_length; |
66 | cur_bd_idx++; |
67 | bd_tbl++; |
68 | } |
69 | } |
70 | |
71 | *start_bd_off = buf_off - cur_offset; |
72 | *start_bd_idx = cur_bd_idx; |
73 | } |
74 | |
75 | /** |
76 | * bnx2i_setup_write_cmd_bd_info - sets up BD various information |
77 | * @task: transport layer's cmd struct pointer |
78 | * |
79 | * identifies & marks various bd info for scsi command's immediate data, |
80 | * unsolicited data and first solicited data seq which includes BD start |
81 | * index & BD buf off. his function takes into account iscsi parameter such |
82 | * as immediate data and unsolicited data is support on this connection. |
83 | */ |
84 | static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) |
85 | { |
86 | struct bnx2i_cmd *cmd = task->dd_data; |
87 | u32 start_bd_offset; |
88 | u32 start_bd_idx; |
89 | u32 buffer_offset = 0; |
90 | u32 cmd_len = cmd->req.total_data_transfer_length; |
91 | |
92 | /* if ImmediateData is turned off & IntialR2T is turned on, |
93 | * there will be no immediate or unsolicited data, just return. |
94 | */ |
95 | if (!iscsi_task_has_unsol_data(task) && !task->imm_count) |
96 | return; |
97 | |
98 | /* Immediate data */ |
99 | buffer_offset += task->imm_count; |
100 | if (task->imm_count == cmd_len) |
101 | return; |
102 | |
103 | if (iscsi_task_has_unsol_data(task)) { |
104 | bnx2i_get_write_cmd_bd_idx(cmd, buf_off: buffer_offset, |
105 | start_bd_off: &start_bd_offset, start_bd_idx: &start_bd_idx); |
106 | cmd->req.ud_buffer_offset = start_bd_offset; |
107 | cmd->req.ud_start_bd_index = start_bd_idx; |
108 | buffer_offset += task->unsol_r2t.data_length; |
109 | } |
110 | |
111 | if (buffer_offset != cmd_len) { |
112 | bnx2i_get_write_cmd_bd_idx(cmd, buf_off: buffer_offset, |
113 | start_bd_off: &start_bd_offset, start_bd_idx: &start_bd_idx); |
114 | if ((start_bd_offset > task->conn->session->first_burst) || |
115 | (start_bd_idx > scsi_sg_count(cmd: cmd->scsi_cmd))) { |
116 | int i = 0; |
117 | |
118 | iscsi_conn_printk(KERN_ALERT, task->conn, |
119 | "bnx2i- error, buf offset 0x%x " |
120 | "bd_valid %d use_sg %d\n" , |
121 | buffer_offset, cmd->io_tbl.bd_valid, |
122 | scsi_sg_count(cmd->scsi_cmd)); |
123 | for (i = 0; i < cmd->io_tbl.bd_valid; i++) |
124 | iscsi_conn_printk(KERN_ALERT, task->conn, |
125 | "bnx2i err, bd[%d]: len %x\n" , |
126 | i, cmd->io_tbl.bd_tbl[i].\ |
127 | buffer_length); |
128 | } |
129 | cmd->req.sd_buffer_offset = start_bd_offset; |
130 | cmd->req.sd_start_bd_index = start_bd_idx; |
131 | } |
132 | } |
133 | |
134 | |
135 | |
136 | /** |
137 | * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table |
138 | * @hba: adapter instance |
139 | * @cmd: iscsi cmd struct pointer |
140 | * |
141 | * map SG list |
142 | */ |
143 | static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) |
144 | { |
145 | struct scsi_cmnd *sc = cmd->scsi_cmd; |
146 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
147 | struct scatterlist *sg; |
148 | int byte_count = 0; |
149 | int bd_count = 0; |
150 | int sg_count; |
151 | int sg_len; |
152 | u64 addr; |
153 | int i; |
154 | |
155 | BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); |
156 | |
157 | sg_count = scsi_dma_map(cmd: sc); |
158 | |
159 | scsi_for_each_sg(sc, sg, sg_count, i) { |
160 | sg_len = sg_dma_len(sg); |
161 | addr = (u64) sg_dma_address(sg); |
162 | bd[bd_count].buffer_addr_lo = addr & 0xffffffff; |
163 | bd[bd_count].buffer_addr_hi = addr >> 32; |
164 | bd[bd_count].buffer_length = sg_len; |
165 | bd[bd_count].flags = 0; |
166 | if (bd_count == 0) |
167 | bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; |
168 | |
169 | byte_count += sg_len; |
170 | bd_count++; |
171 | } |
172 | |
173 | if (bd_count) |
174 | bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; |
175 | |
176 | BUG_ON(byte_count != scsi_bufflen(sc)); |
177 | return bd_count; |
178 | } |
179 | |
180 | /** |
181 | * bnx2i_iscsi_map_sg_list - maps SG list |
182 | * @cmd: iscsi cmd struct pointer |
183 | * |
184 | * creates BD list table for the command |
185 | */ |
186 | static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) |
187 | { |
188 | int bd_count; |
189 | |
190 | bd_count = bnx2i_map_scsi_sg(hba: cmd->conn->hba, cmd); |
191 | if (!bd_count) { |
192 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
193 | |
194 | bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; |
195 | bd[0].buffer_length = bd[0].flags = 0; |
196 | } |
197 | cmd->io_tbl.bd_valid = bd_count; |
198 | } |
199 | |
200 | |
201 | /** |
202 | * bnx2i_iscsi_unmap_sg_list - unmaps SG list |
203 | * @cmd: iscsi cmd struct pointer |
204 | * |
205 | * unmap IO buffers and invalidate the BD table |
206 | */ |
207 | void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) |
208 | { |
209 | struct scsi_cmnd *sc = cmd->scsi_cmd; |
210 | |
211 | if (cmd->io_tbl.bd_valid && sc) { |
212 | scsi_dma_unmap(cmd: sc); |
213 | cmd->io_tbl.bd_valid = 0; |
214 | } |
215 | } |
216 | |
217 | static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) |
218 | { |
219 | memset(&cmd->req, 0x00, sizeof(cmd->req)); |
220 | cmd->req.op_code = 0xFF; |
221 | cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; |
222 | cmd->req.bd_list_addr_hi = |
223 | (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); |
224 | |
225 | } |
226 | |
227 | |
228 | /** |
229 | * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' |
230 | * @hba: pointer to adapter instance |
231 | * @bnx2i_conn: pointer to iscsi connection |
232 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
233 | * |
234 | * update iscsi cid table entry with connection pointer. This enables |
235 | * driver to quickly get hold of connection structure pointer in |
236 | * completion/interrupt thread using iscsi context ID |
237 | */ |
238 | static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, |
239 | struct bnx2i_conn *bnx2i_conn, |
240 | u32 iscsi_cid) |
241 | { |
242 | if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { |
243 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, |
244 | "conn bind - entry #%d not free\n" , iscsi_cid); |
245 | return -EBUSY; |
246 | } |
247 | |
248 | hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; |
249 | return 0; |
250 | } |
251 | |
252 | |
253 | /** |
254 | * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr |
255 | * @hba: pointer to adapter instance |
256 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
257 | */ |
258 | struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, |
259 | u16 iscsi_cid) |
260 | { |
261 | if (!hba->cid_que.conn_cid_tbl) { |
262 | printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n" ); |
263 | return NULL; |
264 | |
265 | } else if (iscsi_cid >= hba->max_active_conns) { |
266 | printk(KERN_ERR "bnx2i: wrong cid #%d\n" , iscsi_cid); |
267 | return NULL; |
268 | } |
269 | return hba->cid_que.conn_cid_tbl[iscsi_cid]; |
270 | } |
271 | |
272 | |
273 | /** |
274 | * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool |
275 | * @hba: pointer to adapter instance |
276 | */ |
277 | static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) |
278 | { |
279 | int idx; |
280 | |
281 | if (!hba->cid_que.cid_free_cnt) |
282 | return -1; |
283 | |
284 | idx = hba->cid_que.cid_q_cons_idx; |
285 | hba->cid_que.cid_q_cons_idx++; |
286 | if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) |
287 | hba->cid_que.cid_q_cons_idx = 0; |
288 | |
289 | hba->cid_que.cid_free_cnt--; |
290 | return hba->cid_que.cid_que[idx]; |
291 | } |
292 | |
293 | |
294 | /** |
295 | * bnx2i_free_iscsi_cid - returns tcp port to free list |
296 | * @hba: pointer to adapter instance |
297 | * @iscsi_cid: iscsi context ID to free |
298 | */ |
299 | static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) |
300 | { |
301 | int idx; |
302 | |
303 | if (iscsi_cid == (u16) -1) |
304 | return; |
305 | |
306 | hba->cid_que.cid_free_cnt++; |
307 | |
308 | idx = hba->cid_que.cid_q_prod_idx; |
309 | hba->cid_que.cid_que[idx] = iscsi_cid; |
310 | hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; |
311 | hba->cid_que.cid_q_prod_idx++; |
312 | if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) |
313 | hba->cid_que.cid_q_prod_idx = 0; |
314 | } |
315 | |
316 | |
317 | /** |
318 | * bnx2i_setup_free_cid_que - sets up free iscsi cid queue |
319 | * @hba: pointer to adapter instance |
320 | * |
321 | * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, |
322 | * and initialize table attributes |
323 | */ |
324 | static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) |
325 | { |
326 | int mem_size; |
327 | int i; |
328 | |
329 | mem_size = hba->max_active_conns * sizeof(u32); |
330 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
331 | |
332 | hba->cid_que.cid_que_base = kmalloc(size: mem_size, GFP_KERNEL); |
333 | if (!hba->cid_que.cid_que_base) |
334 | return -ENOMEM; |
335 | |
336 | mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); |
337 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
338 | hba->cid_que.conn_cid_tbl = kmalloc(size: mem_size, GFP_KERNEL); |
339 | if (!hba->cid_que.conn_cid_tbl) { |
340 | kfree(objp: hba->cid_que.cid_que_base); |
341 | hba->cid_que.cid_que_base = NULL; |
342 | return -ENOMEM; |
343 | } |
344 | |
345 | hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; |
346 | hba->cid_que.cid_q_prod_idx = 0; |
347 | hba->cid_que.cid_q_cons_idx = 0; |
348 | hba->cid_que.cid_q_max_idx = hba->max_active_conns; |
349 | hba->cid_que.cid_free_cnt = hba->max_active_conns; |
350 | |
351 | for (i = 0; i < hba->max_active_conns; i++) { |
352 | hba->cid_que.cid_que[i] = i; |
353 | hba->cid_que.conn_cid_tbl[i] = NULL; |
354 | } |
355 | return 0; |
356 | } |
357 | |
358 | |
359 | /** |
360 | * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources |
361 | * @hba: pointer to adapter instance |
362 | */ |
363 | static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) |
364 | { |
365 | kfree(objp: hba->cid_que.cid_que_base); |
366 | hba->cid_que.cid_que_base = NULL; |
367 | |
368 | kfree(objp: hba->cid_que.conn_cid_tbl); |
369 | hba->cid_que.conn_cid_tbl = NULL; |
370 | } |
371 | |
372 | |
373 | /** |
374 | * bnx2i_alloc_ep - allocates ep structure from global pool |
375 | * @hba: pointer to adapter instance |
376 | * |
377 | * routine allocates a free endpoint structure from global pool and |
378 | * a tcp port to be used for this connection. Global resource lock, |
379 | * 'bnx2i_resc_lock' is held while accessing shared global data structures |
380 | */ |
381 | static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) |
382 | { |
383 | struct iscsi_endpoint *ep; |
384 | struct bnx2i_endpoint *bnx2i_ep; |
385 | u32 ec_div; |
386 | |
387 | ep = iscsi_create_endpoint(dd_size: sizeof(*bnx2i_ep)); |
388 | if (!ep) { |
389 | printk(KERN_ERR "bnx2i: Could not allocate ep\n" ); |
390 | return NULL; |
391 | } |
392 | |
393 | bnx2i_ep = ep->dd_data; |
394 | bnx2i_ep->cls_ep = ep; |
395 | INIT_LIST_HEAD(list: &bnx2i_ep->link); |
396 | bnx2i_ep->state = EP_STATE_IDLE; |
397 | bnx2i_ep->ep_iscsi_cid = (u16) -1; |
398 | bnx2i_ep->hba = hba; |
399 | bnx2i_ep->hba_age = hba->age; |
400 | |
401 | ec_div = event_coal_div; |
402 | while (ec_div >>= 1) |
403 | bnx2i_ep->ec_shift += 1; |
404 | |
405 | hba->ofld_conns_active++; |
406 | init_waitqueue_head(&bnx2i_ep->ofld_wait); |
407 | return ep; |
408 | } |
409 | |
410 | |
411 | /** |
412 | * bnx2i_free_ep - free endpoint |
413 | * @ep: pointer to iscsi endpoint structure |
414 | */ |
415 | static void bnx2i_free_ep(struct iscsi_endpoint *ep) |
416 | { |
417 | struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; |
418 | unsigned long flags; |
419 | |
420 | spin_lock_irqsave(&bnx2i_resc_lock, flags); |
421 | bnx2i_ep->state = EP_STATE_IDLE; |
422 | bnx2i_ep->hba->ofld_conns_active--; |
423 | |
424 | if (bnx2i_ep->ep_iscsi_cid != (u16) -1) |
425 | bnx2i_free_iscsi_cid(hba: bnx2i_ep->hba, iscsi_cid: bnx2i_ep->ep_iscsi_cid); |
426 | |
427 | if (bnx2i_ep->conn) { |
428 | bnx2i_ep->conn->ep = NULL; |
429 | bnx2i_ep->conn = NULL; |
430 | } |
431 | |
432 | bnx2i_ep->hba = NULL; |
433 | spin_unlock_irqrestore(lock: &bnx2i_resc_lock, flags); |
434 | iscsi_destroy_endpoint(ep); |
435 | } |
436 | |
437 | |
438 | /** |
439 | * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command |
440 | * @hba: adapter instance pointer |
441 | * @session: iscsi session pointer |
442 | * @cmd: iscsi command structure |
443 | */ |
444 | static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, |
445 | struct bnx2i_cmd *cmd) |
446 | { |
447 | struct io_bdt *io = &cmd->io_tbl; |
448 | struct iscsi_bd *bd; |
449 | |
450 | io->bd_tbl = dma_alloc_coherent(dev: &hba->pcidev->dev, |
451 | ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), |
452 | dma_handle: &io->bd_tbl_dma, GFP_KERNEL); |
453 | if (!io->bd_tbl) { |
454 | iscsi_session_printk(KERN_ERR, session, "Could not " |
455 | "allocate bdt.\n" ); |
456 | return -ENOMEM; |
457 | } |
458 | io->bd_valid = 0; |
459 | return 0; |
460 | } |
461 | |
462 | /** |
463 | * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table |
464 | * @hba: adapter instance pointer |
465 | * @session: iscsi session pointer |
466 | */ |
467 | static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, |
468 | struct iscsi_session *session) |
469 | { |
470 | int i; |
471 | |
472 | for (i = 0; i < session->cmds_max; i++) { |
473 | struct iscsi_task *task = session->cmds[i]; |
474 | struct bnx2i_cmd *cmd = task->dd_data; |
475 | |
476 | if (cmd->io_tbl.bd_tbl) |
477 | dma_free_coherent(dev: &hba->pcidev->dev, |
478 | ISCSI_MAX_BDS_PER_CMD * |
479 | sizeof(struct iscsi_bd), |
480 | cpu_addr: cmd->io_tbl.bd_tbl, |
481 | dma_handle: cmd->io_tbl.bd_tbl_dma); |
482 | } |
483 | |
484 | } |
485 | |
486 | |
487 | /** |
488 | * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session |
489 | * @hba: adapter instance pointer |
490 | * @session: iscsi session pointer |
491 | */ |
492 | static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, |
493 | struct iscsi_session *session) |
494 | { |
495 | int i; |
496 | |
497 | for (i = 0; i < session->cmds_max; i++) { |
498 | struct iscsi_task *task = session->cmds[i]; |
499 | struct bnx2i_cmd *cmd = task->dd_data; |
500 | |
501 | task->hdr = &cmd->hdr; |
502 | task->hdr_max = sizeof(struct iscsi_hdr); |
503 | |
504 | if (bnx2i_alloc_bdt(hba, session, cmd)) |
505 | goto free_bdts; |
506 | } |
507 | |
508 | return 0; |
509 | |
510 | free_bdts: |
511 | bnx2i_destroy_cmd_pool(hba, session); |
512 | return -ENOMEM; |
513 | } |
514 | |
515 | |
516 | /** |
517 | * bnx2i_setup_mp_bdt - allocate BD table resources |
518 | * @hba: pointer to adapter structure |
519 | * |
520 | * Allocate memory for dummy buffer and associated BD |
521 | * table to be used by middle path (MP) requests |
522 | */ |
523 | static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) |
524 | { |
525 | int rc = 0; |
526 | struct iscsi_bd *mp_bdt; |
527 | u64 addr; |
528 | |
529 | hba->mp_bd_tbl = dma_alloc_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
530 | dma_handle: &hba->mp_bd_dma, GFP_KERNEL); |
531 | if (!hba->mp_bd_tbl) { |
532 | printk(KERN_ERR "unable to allocate Middle Path BDT\n" ); |
533 | rc = -1; |
534 | goto out; |
535 | } |
536 | |
537 | hba->dummy_buffer = dma_alloc_coherent(dev: &hba->pcidev->dev, |
538 | CNIC_PAGE_SIZE, |
539 | dma_handle: &hba->dummy_buf_dma, GFP_KERNEL); |
540 | if (!hba->dummy_buffer) { |
541 | printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n" ); |
542 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
543 | cpu_addr: hba->mp_bd_tbl, dma_handle: hba->mp_bd_dma); |
544 | hba->mp_bd_tbl = NULL; |
545 | rc = -1; |
546 | goto out; |
547 | } |
548 | |
549 | mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; |
550 | addr = (unsigned long) hba->dummy_buf_dma; |
551 | mp_bdt->buffer_addr_lo = addr & 0xffffffff; |
552 | mp_bdt->buffer_addr_hi = addr >> 32; |
553 | mp_bdt->buffer_length = CNIC_PAGE_SIZE; |
554 | mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
555 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
556 | out: |
557 | return rc; |
558 | } |
559 | |
560 | |
561 | /** |
562 | * bnx2i_free_mp_bdt - releases ITT back to free pool |
563 | * @hba: pointer to adapter instance |
564 | * |
565 | * free MP dummy buffer and associated BD table |
566 | */ |
567 | static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) |
568 | { |
569 | if (hba->mp_bd_tbl) { |
570 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
571 | cpu_addr: hba->mp_bd_tbl, dma_handle: hba->mp_bd_dma); |
572 | hba->mp_bd_tbl = NULL; |
573 | } |
574 | if (hba->dummy_buffer) { |
575 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
576 | cpu_addr: hba->dummy_buffer, dma_handle: hba->dummy_buf_dma); |
577 | hba->dummy_buffer = NULL; |
578 | } |
579 | return; |
580 | } |
581 | |
582 | /** |
583 | * bnx2i_drop_session - notifies iscsid of connection error. |
584 | * @cls_session: iscsi cls session pointer |
585 | * |
586 | * This notifies iscsid that there is a error, so it can initiate |
587 | * recovery. |
588 | * |
589 | * This relies on caller using the iscsi class iterator so the object |
590 | * is refcounted and does not disapper from under us. |
591 | */ |
592 | void bnx2i_drop_session(struct iscsi_cls_session *cls_session) |
593 | { |
594 | iscsi_session_failure(session: cls_session->dd_data, err: ISCSI_ERR_CONN_FAILED); |
595 | } |
596 | |
597 | /** |
598 | * bnx2i_ep_destroy_list_add - add an entry to EP destroy list |
599 | * @hba: pointer to adapter instance |
600 | * @ep: pointer to endpoint (transport identifier) structure |
601 | * |
602 | * EP destroy queue manager |
603 | */ |
604 | static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, |
605 | struct bnx2i_endpoint *ep) |
606 | { |
607 | write_lock_bh(&hba->ep_rdwr_lock); |
608 | list_add_tail(new: &ep->link, head: &hba->ep_destroy_list); |
609 | write_unlock_bh(&hba->ep_rdwr_lock); |
610 | return 0; |
611 | } |
612 | |
613 | /** |
614 | * bnx2i_ep_destroy_list_del - add an entry to EP destroy list |
615 | * |
616 | * @hba: pointer to adapter instance |
617 | * @ep: pointer to endpoint (transport identifier) structure |
618 | * |
619 | * EP destroy queue manager |
620 | */ |
621 | static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, |
622 | struct bnx2i_endpoint *ep) |
623 | { |
624 | write_lock_bh(&hba->ep_rdwr_lock); |
625 | list_del_init(entry: &ep->link); |
626 | write_unlock_bh(&hba->ep_rdwr_lock); |
627 | |
628 | return 0; |
629 | } |
630 | |
631 | /** |
632 | * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list |
633 | * @hba: pointer to adapter instance |
634 | * @ep: pointer to endpoint (transport identifier) structure |
635 | * |
636 | * pending conn offload completion queue manager |
637 | */ |
638 | static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, |
639 | struct bnx2i_endpoint *ep) |
640 | { |
641 | write_lock_bh(&hba->ep_rdwr_lock); |
642 | list_add_tail(new: &ep->link, head: &hba->ep_ofld_list); |
643 | write_unlock_bh(&hba->ep_rdwr_lock); |
644 | return 0; |
645 | } |
646 | |
647 | /** |
648 | * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list |
649 | * @hba: pointer to adapter instance |
650 | * @ep: pointer to endpoint (transport identifier) structure |
651 | * |
652 | * pending conn offload completion queue manager |
653 | */ |
654 | static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, |
655 | struct bnx2i_endpoint *ep) |
656 | { |
657 | write_lock_bh(&hba->ep_rdwr_lock); |
658 | list_del_init(entry: &ep->link); |
659 | write_unlock_bh(&hba->ep_rdwr_lock); |
660 | return 0; |
661 | } |
662 | |
663 | |
664 | /** |
665 | * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints |
666 | * |
667 | * @hba: pointer to adapter instance |
668 | * @iscsi_cid: iscsi context ID to find |
669 | * |
670 | */ |
671 | struct bnx2i_endpoint * |
672 | bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) |
673 | { |
674 | struct list_head *list; |
675 | struct list_head *tmp; |
676 | struct bnx2i_endpoint *ep = NULL; |
677 | |
678 | read_lock_bh(&hba->ep_rdwr_lock); |
679 | list_for_each_safe(list, tmp, &hba->ep_ofld_list) { |
680 | ep = (struct bnx2i_endpoint *)list; |
681 | |
682 | if (ep->ep_iscsi_cid == iscsi_cid) |
683 | break; |
684 | ep = NULL; |
685 | } |
686 | read_unlock_bh(&hba->ep_rdwr_lock); |
687 | |
688 | if (!ep) |
689 | printk(KERN_ERR "l5 cid %d not found\n" , iscsi_cid); |
690 | return ep; |
691 | } |
692 | |
693 | /** |
694 | * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list |
695 | * @hba: pointer to adapter instance |
696 | * @iscsi_cid: iscsi context ID to find |
697 | * |
698 | */ |
699 | struct bnx2i_endpoint * |
700 | bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) |
701 | { |
702 | struct list_head *list; |
703 | struct list_head *tmp; |
704 | struct bnx2i_endpoint *ep = NULL; |
705 | |
706 | read_lock_bh(&hba->ep_rdwr_lock); |
707 | list_for_each_safe(list, tmp, &hba->ep_destroy_list) { |
708 | ep = (struct bnx2i_endpoint *)list; |
709 | |
710 | if (ep->ep_iscsi_cid == iscsi_cid) |
711 | break; |
712 | ep = NULL; |
713 | } |
714 | read_unlock_bh(&hba->ep_rdwr_lock); |
715 | |
716 | if (!ep) |
717 | printk(KERN_ERR "l5 cid %d not found\n" , iscsi_cid); |
718 | |
719 | return ep; |
720 | } |
721 | |
722 | /** |
723 | * bnx2i_ep_active_list_add - add an entry to ep active list |
724 | * @hba: pointer to adapter instance |
725 | * @ep: pointer to endpoint (transport identifier) structure |
726 | * |
727 | * current active conn queue manager |
728 | */ |
729 | static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba, |
730 | struct bnx2i_endpoint *ep) |
731 | { |
732 | write_lock_bh(&hba->ep_rdwr_lock); |
733 | list_add_tail(new: &ep->link, head: &hba->ep_active_list); |
734 | write_unlock_bh(&hba->ep_rdwr_lock); |
735 | } |
736 | |
737 | |
738 | /** |
739 | * bnx2i_ep_active_list_del - deletes an entry to ep active list |
740 | * @hba: pointer to adapter instance |
741 | * @ep: pointer to endpoint (transport identifier) structure |
742 | * |
743 | * current active conn queue manager |
744 | */ |
745 | static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba, |
746 | struct bnx2i_endpoint *ep) |
747 | { |
748 | write_lock_bh(&hba->ep_rdwr_lock); |
749 | list_del_init(entry: &ep->link); |
750 | write_unlock_bh(&hba->ep_rdwr_lock); |
751 | } |
752 | |
753 | |
754 | /** |
755 | * bnx2i_setup_host_queue_size - assigns shost->can_queue param |
756 | * @hba: pointer to adapter instance |
757 | * @shost: scsi host pointer |
758 | * |
759 | * Initializes 'can_queue' parameter based on how many outstanding commands |
760 | * the device can handle. Each device 5708/5709/57710 has different |
761 | * capabilities |
762 | */ |
763 | static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, |
764 | struct Scsi_Host *shost) |
765 | { |
766 | if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) |
767 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; |
768 | else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) |
769 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; |
770 | else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) |
771 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; |
772 | else |
773 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; |
774 | } |
775 | |
776 | |
777 | /** |
778 | * bnx2i_alloc_hba - allocate and init adapter instance |
779 | * @cnic: cnic device pointer |
780 | * |
781 | * allocate & initialize adapter structure and call other |
782 | * support routines to do per adapter initialization |
783 | */ |
784 | struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) |
785 | { |
786 | struct Scsi_Host *shost; |
787 | struct bnx2i_hba *hba; |
788 | |
789 | shost = iscsi_host_alloc(sht: &bnx2i_host_template, dd_data_size: sizeof(*hba), xmit_can_sleep: 0); |
790 | if (!shost) |
791 | return NULL; |
792 | shost->dma_boundary = cnic->pcidev->dma_mask; |
793 | shost->transportt = bnx2i_scsi_xport_template; |
794 | shost->max_id = ISCSI_MAX_CONNS_PER_HBA - 1; |
795 | shost->max_channel = 0; |
796 | shost->max_lun = 512; |
797 | shost->max_cmd_len = 16; |
798 | |
799 | hba = iscsi_host_priv(shost); |
800 | hba->shost = shost; |
801 | hba->netdev = cnic->netdev; |
802 | /* Get PCI related information and update hba struct members */ |
803 | hba->pcidev = cnic->pcidev; |
804 | pci_dev_get(dev: hba->pcidev); |
805 | hba->pci_did = hba->pcidev->device; |
806 | hba->pci_vid = hba->pcidev->vendor; |
807 | hba->pci_sdid = hba->pcidev->subsystem_device; |
808 | hba->pci_svid = hba->pcidev->subsystem_vendor; |
809 | hba->pci_func = PCI_FUNC(hba->pcidev->devfn); |
810 | hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); |
811 | |
812 | bnx2i_identify_device(hba, dev: cnic); |
813 | bnx2i_setup_host_queue_size(hba, shost); |
814 | |
815 | hba->reg_base = pci_resource_start(hba->pcidev, 0); |
816 | if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { |
817 | hba->regview = pci_iomap(dev: hba->pcidev, bar: 0, BNX2_MQ_CONFIG2); |
818 | if (!hba->regview) |
819 | goto ioreg_map_err; |
820 | } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
821 | hba->regview = pci_iomap(dev: hba->pcidev, bar: 0, max: 4096); |
822 | if (!hba->regview) |
823 | goto ioreg_map_err; |
824 | } |
825 | |
826 | if (bnx2i_setup_mp_bdt(hba)) |
827 | goto mp_bdt_mem_err; |
828 | |
829 | INIT_LIST_HEAD(list: &hba->ep_ofld_list); |
830 | INIT_LIST_HEAD(list: &hba->ep_active_list); |
831 | INIT_LIST_HEAD(list: &hba->ep_destroy_list); |
832 | rwlock_init(&hba->ep_rdwr_lock); |
833 | |
834 | hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; |
835 | |
836 | /* different values for 5708/5709/57710 */ |
837 | hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; |
838 | |
839 | if (bnx2i_setup_free_cid_que(hba)) |
840 | goto cid_que_err; |
841 | |
842 | /* SQ/RQ/CQ size can be changed via sysfx interface */ |
843 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
844 | if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) |
845 | hba->max_sqes = sq_size; |
846 | else |
847 | hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; |
848 | } else { /* 5706/5708/5709 */ |
849 | if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) |
850 | hba->max_sqes = sq_size; |
851 | else |
852 | hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; |
853 | } |
854 | |
855 | hba->max_rqes = rq_size; |
856 | hba->max_cqes = hba->max_sqes + rq_size; |
857 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
858 | if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) |
859 | hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; |
860 | } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) |
861 | hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; |
862 | |
863 | hba->num_ccell = hba->max_sqes / 2; |
864 | |
865 | spin_lock_init(&hba->lock); |
866 | mutex_init(&hba->net_dev_lock); |
867 | init_waitqueue_head(&hba->eh_wait); |
868 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
869 | hba->hba_shutdown_tmo = 30 * HZ; |
870 | hba->conn_teardown_tmo = 20 * HZ; |
871 | hba->conn_ctx_destroy_tmo = 6 * HZ; |
872 | } else { /* 5706/5708/5709 */ |
873 | hba->hba_shutdown_tmo = 20 * HZ; |
874 | hba->conn_teardown_tmo = 10 * HZ; |
875 | hba->conn_ctx_destroy_tmo = 2 * HZ; |
876 | } |
877 | |
878 | #ifdef CONFIG_32BIT |
879 | spin_lock_init(&hba->stat_lock); |
880 | #endif |
881 | memset(&hba->stats, 0, sizeof(struct iscsi_stats_info)); |
882 | |
883 | if (iscsi_host_add(shost, pdev: &hba->pcidev->dev)) |
884 | goto free_dump_mem; |
885 | return hba; |
886 | |
887 | free_dump_mem: |
888 | bnx2i_release_free_cid_que(hba); |
889 | cid_que_err: |
890 | bnx2i_free_mp_bdt(hba); |
891 | mp_bdt_mem_err: |
892 | if (hba->regview) { |
893 | pci_iounmap(dev: hba->pcidev, hba->regview); |
894 | hba->regview = NULL; |
895 | } |
896 | ioreg_map_err: |
897 | pci_dev_put(dev: hba->pcidev); |
898 | scsi_host_put(t: shost); |
899 | return NULL; |
900 | } |
901 | |
902 | /** |
903 | * bnx2i_free_hba- releases hba structure and resources held by the adapter |
904 | * @hba: pointer to adapter instance |
905 | * |
906 | * free adapter structure and call various cleanup routines. |
907 | */ |
908 | void bnx2i_free_hba(struct bnx2i_hba *hba) |
909 | { |
910 | struct Scsi_Host *shost = hba->shost; |
911 | |
912 | iscsi_host_remove(shost, is_shutdown: false); |
913 | INIT_LIST_HEAD(list: &hba->ep_ofld_list); |
914 | INIT_LIST_HEAD(list: &hba->ep_active_list); |
915 | INIT_LIST_HEAD(list: &hba->ep_destroy_list); |
916 | |
917 | if (hba->regview) { |
918 | pci_iounmap(dev: hba->pcidev, hba->regview); |
919 | hba->regview = NULL; |
920 | } |
921 | pci_dev_put(dev: hba->pcidev); |
922 | bnx2i_free_mp_bdt(hba); |
923 | bnx2i_release_free_cid_que(hba); |
924 | iscsi_host_free(shost); |
925 | } |
926 | |
927 | /** |
928 | * bnx2i_conn_free_login_resources - free DMA resources used for login process |
929 | * @hba: pointer to adapter instance |
930 | * @bnx2i_conn: iscsi connection pointer |
931 | * |
932 | * Login related resources, mostly BDT & payload DMA memory is freed |
933 | */ |
934 | static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, |
935 | struct bnx2i_conn *bnx2i_conn) |
936 | { |
937 | if (bnx2i_conn->gen_pdu.resp_bd_tbl) { |
938 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
939 | cpu_addr: bnx2i_conn->gen_pdu.resp_bd_tbl, |
940 | dma_handle: bnx2i_conn->gen_pdu.resp_bd_dma); |
941 | bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; |
942 | } |
943 | |
944 | if (bnx2i_conn->gen_pdu.req_bd_tbl) { |
945 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
946 | cpu_addr: bnx2i_conn->gen_pdu.req_bd_tbl, |
947 | dma_handle: bnx2i_conn->gen_pdu.req_bd_dma); |
948 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; |
949 | } |
950 | |
951 | if (bnx2i_conn->gen_pdu.resp_buf) { |
952 | dma_free_coherent(dev: &hba->pcidev->dev, |
953 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
954 | cpu_addr: bnx2i_conn->gen_pdu.resp_buf, |
955 | dma_handle: bnx2i_conn->gen_pdu.resp_dma_addr); |
956 | bnx2i_conn->gen_pdu.resp_buf = NULL; |
957 | } |
958 | |
959 | if (bnx2i_conn->gen_pdu.req_buf) { |
960 | dma_free_coherent(dev: &hba->pcidev->dev, |
961 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
962 | cpu_addr: bnx2i_conn->gen_pdu.req_buf, |
963 | dma_handle: bnx2i_conn->gen_pdu.req_dma_addr); |
964 | bnx2i_conn->gen_pdu.req_buf = NULL; |
965 | } |
966 | } |
967 | |
968 | /** |
969 | * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. |
970 | * @hba: pointer to adapter instance |
971 | * @bnx2i_conn: iscsi connection pointer |
972 | * |
973 | * Mgmt task DNA resources are allocated in this routine. |
974 | */ |
975 | static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, |
976 | struct bnx2i_conn *bnx2i_conn) |
977 | { |
978 | /* Allocate memory for login request/response buffers */ |
979 | bnx2i_conn->gen_pdu.req_buf = |
980 | dma_alloc_coherent(dev: &hba->pcidev->dev, |
981 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
982 | dma_handle: &bnx2i_conn->gen_pdu.req_dma_addr, |
983 | GFP_KERNEL); |
984 | if (bnx2i_conn->gen_pdu.req_buf == NULL) |
985 | goto login_req_buf_failure; |
986 | |
987 | bnx2i_conn->gen_pdu.req_buf_size = 0; |
988 | bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; |
989 | |
990 | bnx2i_conn->gen_pdu.resp_buf = |
991 | dma_alloc_coherent(dev: &hba->pcidev->dev, |
992 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
993 | dma_handle: &bnx2i_conn->gen_pdu.resp_dma_addr, |
994 | GFP_KERNEL); |
995 | if (bnx2i_conn->gen_pdu.resp_buf == NULL) |
996 | goto login_resp_buf_failure; |
997 | |
998 | bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; |
999 | bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; |
1000 | |
1001 | bnx2i_conn->gen_pdu.req_bd_tbl = |
1002 | dma_alloc_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
1003 | dma_handle: &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); |
1004 | if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) |
1005 | goto login_req_bd_tbl_failure; |
1006 | |
1007 | bnx2i_conn->gen_pdu.resp_bd_tbl = |
1008 | dma_alloc_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
1009 | dma_handle: &bnx2i_conn->gen_pdu.resp_bd_dma, |
1010 | GFP_KERNEL); |
1011 | if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) |
1012 | goto login_resp_bd_tbl_failure; |
1013 | |
1014 | return 0; |
1015 | |
1016 | login_resp_bd_tbl_failure: |
1017 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
1018 | cpu_addr: bnx2i_conn->gen_pdu.req_bd_tbl, |
1019 | dma_handle: bnx2i_conn->gen_pdu.req_bd_dma); |
1020 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; |
1021 | |
1022 | login_req_bd_tbl_failure: |
1023 | dma_free_coherent(dev: &hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
1024 | cpu_addr: bnx2i_conn->gen_pdu.resp_buf, |
1025 | dma_handle: bnx2i_conn->gen_pdu.resp_dma_addr); |
1026 | bnx2i_conn->gen_pdu.resp_buf = NULL; |
1027 | login_resp_buf_failure: |
1028 | dma_free_coherent(dev: &hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
1029 | cpu_addr: bnx2i_conn->gen_pdu.req_buf, |
1030 | dma_handle: bnx2i_conn->gen_pdu.req_dma_addr); |
1031 | bnx2i_conn->gen_pdu.req_buf = NULL; |
1032 | login_req_buf_failure: |
1033 | iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, |
1034 | "login resource alloc failed!!\n" ); |
1035 | return -ENOMEM; |
1036 | |
1037 | } |
1038 | |
1039 | |
1040 | /** |
1041 | * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. |
1042 | * @bnx2i_conn: iscsi connection pointer |
1043 | * |
1044 | * Allocates buffers and BD tables before shipping requests to cnic |
1045 | * for PDUs prepared by 'iscsid' daemon |
1046 | */ |
1047 | static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) |
1048 | { |
1049 | struct iscsi_bd *bd_tbl; |
1050 | |
1051 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; |
1052 | |
1053 | bd_tbl->buffer_addr_hi = |
1054 | (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); |
1055 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; |
1056 | bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - |
1057 | bnx2i_conn->gen_pdu.req_buf; |
1058 | bd_tbl->reserved0 = 0; |
1059 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
1060 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
1061 | |
1062 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; |
1063 | bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; |
1064 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; |
1065 | bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; |
1066 | bd_tbl->reserved0 = 0; |
1067 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
1068 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
1069 | } |
1070 | |
1071 | |
1072 | /** |
1073 | * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. |
1074 | * @task: transport layer task pointer |
1075 | * |
1076 | * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, |
1077 | * Nop-out and Logout requests flow through this path. |
1078 | */ |
1079 | static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) |
1080 | { |
1081 | struct bnx2i_cmd *cmd = task->dd_data; |
1082 | struct bnx2i_conn *bnx2i_conn = cmd->conn; |
1083 | int rc = 0; |
1084 | char *buf; |
1085 | int data_len; |
1086 | |
1087 | bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); |
1088 | switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { |
1089 | case ISCSI_OP_LOGIN: |
1090 | bnx2i_send_iscsi_login(conn: bnx2i_conn, mtask: task); |
1091 | break; |
1092 | case ISCSI_OP_NOOP_OUT: |
1093 | data_len = bnx2i_conn->gen_pdu.req_buf_size; |
1094 | buf = bnx2i_conn->gen_pdu.req_buf; |
1095 | if (data_len) |
1096 | rc = bnx2i_send_iscsi_nopout(conn: bnx2i_conn, mtask: task, |
1097 | datap: buf, data_len, unsol: 1); |
1098 | else |
1099 | rc = bnx2i_send_iscsi_nopout(conn: bnx2i_conn, mtask: task, |
1100 | NULL, data_len: 0, unsol: 1); |
1101 | break; |
1102 | case ISCSI_OP_LOGOUT: |
1103 | rc = bnx2i_send_iscsi_logout(conn: bnx2i_conn, mtask: task); |
1104 | break; |
1105 | case ISCSI_OP_SCSI_TMFUNC: |
1106 | rc = bnx2i_send_iscsi_tmf(conn: bnx2i_conn, mtask: task); |
1107 | break; |
1108 | case ISCSI_OP_TEXT: |
1109 | rc = bnx2i_send_iscsi_text(conn: bnx2i_conn, mtask: task); |
1110 | break; |
1111 | default: |
1112 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, |
1113 | "send_gen: unsupported op 0x%x\n" , |
1114 | task->hdr->opcode); |
1115 | } |
1116 | return rc; |
1117 | } |
1118 | |
1119 | |
1120 | /********************************************************************** |
1121 | * SCSI-ML Interface |
1122 | **********************************************************************/ |
1123 | |
1124 | /** |
1125 | * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe |
1126 | * @sc: SCSI-ML command pointer |
1127 | * @cmd: iscsi cmd pointer |
1128 | */ |
1129 | static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) |
1130 | { |
1131 | u32 dword; |
1132 | int lpcnt; |
1133 | u8 *srcp; |
1134 | u32 *dstp; |
1135 | u32 scsi_lun[2]; |
1136 | |
1137 | int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); |
1138 | cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); |
1139 | cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); |
1140 | |
1141 | lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); |
1142 | srcp = (u8 *) sc->cmnd; |
1143 | dstp = (u32 *) cmd->req.cdb; |
1144 | while (lpcnt--) { |
1145 | memcpy(&dword, (const void *) srcp, 4); |
1146 | *dstp = cpu_to_be32(dword); |
1147 | srcp += 4; |
1148 | dstp++; |
1149 | } |
1150 | if (sc->cmd_len & 0x3) { |
1151 | dword = (u32) srcp[0] | ((u32) srcp[1] << 8); |
1152 | *dstp = cpu_to_be32(dword); |
1153 | } |
1154 | } |
1155 | |
1156 | static void bnx2i_cleanup_task(struct iscsi_task *task) |
1157 | { |
1158 | struct iscsi_conn *conn = task->conn; |
1159 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1160 | struct bnx2i_hba *hba = bnx2i_conn->hba; |
1161 | |
1162 | /* |
1163 | * mgmt task or cmd was never sent to us to transmit. |
1164 | */ |
1165 | if (!task->sc || task->state == ISCSI_TASK_PENDING) |
1166 | return; |
1167 | /* |
1168 | * need to clean-up task context to claim dma buffers |
1169 | */ |
1170 | if (task->state == ISCSI_TASK_ABRT_TMF) { |
1171 | bnx2i_send_cmd_cleanup_req(hba, cmd: task->dd_data); |
1172 | |
1173 | spin_unlock_bh(lock: &conn->session->back_lock); |
1174 | wait_for_completion_timeout(x: &bnx2i_conn->cmd_cleanup_cmpl, |
1175 | timeout: msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); |
1176 | spin_lock_bh(lock: &conn->session->back_lock); |
1177 | } |
1178 | bnx2i_iscsi_unmap_sg_list(cmd: task->dd_data); |
1179 | } |
1180 | |
1181 | /** |
1182 | * bnx2i_mtask_xmit - transmit mtask to chip for further processing |
1183 | * @conn: transport layer conn structure pointer |
1184 | * @task: transport layer command structure pointer |
1185 | */ |
1186 | static int |
1187 | bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) |
1188 | { |
1189 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1190 | struct bnx2i_hba *hba = bnx2i_conn->hba; |
1191 | struct bnx2i_cmd *cmd = task->dd_data; |
1192 | |
1193 | memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); |
1194 | |
1195 | bnx2i_setup_cmd_wqe_template(cmd); |
1196 | bnx2i_conn->gen_pdu.req_buf_size = task->data_count; |
1197 | |
1198 | /* Tx PDU/data length count */ |
1199 | ADD_STATS_64(hba, tx_pdus, 1); |
1200 | ADD_STATS_64(hba, tx_bytes, task->data_count); |
1201 | |
1202 | if (task->data_count) { |
1203 | memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, |
1204 | task->data_count); |
1205 | bnx2i_conn->gen_pdu.req_wr_ptr = |
1206 | bnx2i_conn->gen_pdu.req_buf + task->data_count; |
1207 | } |
1208 | cmd->conn = conn->dd_data; |
1209 | cmd->scsi_cmd = NULL; |
1210 | return bnx2i_iscsi_send_generic_request(task); |
1211 | } |
1212 | |
1213 | /** |
1214 | * bnx2i_task_xmit - transmit iscsi command to chip for further processing |
1215 | * @task: transport layer command structure pointer |
1216 | * |
1217 | * maps SG buffers and send request to chip/firmware in the form of SQ WQE |
1218 | */ |
1219 | static int bnx2i_task_xmit(struct iscsi_task *task) |
1220 | { |
1221 | struct iscsi_conn *conn = task->conn; |
1222 | struct iscsi_session *session = conn->session; |
1223 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); |
1224 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
1225 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1226 | struct scsi_cmnd *sc = task->sc; |
1227 | struct bnx2i_cmd *cmd = task->dd_data; |
1228 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr; |
1229 | |
1230 | if (atomic_read(v: &bnx2i_conn->ep->num_active_cmds) + 1 > |
1231 | hba->max_sqes) |
1232 | return -ENOMEM; |
1233 | |
1234 | /* |
1235 | * If there is no scsi_cmnd this must be a mgmt task |
1236 | */ |
1237 | if (!sc) |
1238 | return bnx2i_mtask_xmit(conn, task); |
1239 | |
1240 | bnx2i_setup_cmd_wqe_template(cmd); |
1241 | cmd->req.op_code = ISCSI_OP_SCSI_CMD; |
1242 | cmd->conn = bnx2i_conn; |
1243 | cmd->scsi_cmd = sc; |
1244 | cmd->req.total_data_transfer_length = scsi_bufflen(cmd: sc); |
1245 | cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); |
1246 | |
1247 | bnx2i_iscsi_map_sg_list(cmd); |
1248 | bnx2i_cpy_scsi_cdb(sc, cmd); |
1249 | |
1250 | cmd->req.op_attr = ISCSI_ATTR_SIMPLE; |
1251 | if (sc->sc_data_direction == DMA_TO_DEVICE) { |
1252 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; |
1253 | cmd->req.itt = task->itt | |
1254 | (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); |
1255 | bnx2i_setup_write_cmd_bd_info(task); |
1256 | } else { |
1257 | if (scsi_bufflen(cmd: sc)) |
1258 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; |
1259 | cmd->req.itt = task->itt | |
1260 | (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); |
1261 | } |
1262 | |
1263 | cmd->req.num_bds = cmd->io_tbl.bd_valid; |
1264 | if (!cmd->io_tbl.bd_valid) { |
1265 | cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; |
1266 | cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); |
1267 | cmd->req.num_bds = 1; |
1268 | } |
1269 | |
1270 | bnx2i_send_iscsi_scsicmd(conn: bnx2i_conn, cmnd: cmd); |
1271 | return 0; |
1272 | } |
1273 | |
1274 | /** |
1275 | * bnx2i_session_create - create a new iscsi session |
1276 | * @ep: pointer to iscsi endpoint |
1277 | * @cmds_max: user specified maximum commands |
1278 | * @qdepth: scsi queue depth to support |
1279 | * @initial_cmdsn: initial iscsi CMDSN to be used for this session |
1280 | * |
1281 | * Creates a new iSCSI session instance on given device. |
1282 | */ |
1283 | static struct iscsi_cls_session * |
1284 | bnx2i_session_create(struct iscsi_endpoint *ep, |
1285 | uint16_t cmds_max, uint16_t qdepth, |
1286 | uint32_t initial_cmdsn) |
1287 | { |
1288 | struct Scsi_Host *shost; |
1289 | struct iscsi_cls_session *cls_session; |
1290 | struct bnx2i_hba *hba; |
1291 | struct bnx2i_endpoint *bnx2i_ep; |
1292 | |
1293 | if (!ep) { |
1294 | printk(KERN_ERR "bnx2i: missing ep.\n" ); |
1295 | return NULL; |
1296 | } |
1297 | |
1298 | bnx2i_ep = ep->dd_data; |
1299 | shost = bnx2i_ep->hba->shost; |
1300 | hba = iscsi_host_priv(shost); |
1301 | if (bnx2i_adapter_ready(hba)) |
1302 | return NULL; |
1303 | |
1304 | /* |
1305 | * user can override hw limit as long as it is within |
1306 | * the min/max. |
1307 | */ |
1308 | if (cmds_max > hba->max_sqes) |
1309 | cmds_max = hba->max_sqes; |
1310 | else if (cmds_max < BNX2I_SQ_WQES_MIN) |
1311 | cmds_max = BNX2I_SQ_WQES_MIN; |
1312 | |
1313 | cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, |
1314 | cmds_max, 0, sizeof(struct bnx2i_cmd), |
1315 | initial_cmdsn, ISCSI_MAX_TARGET); |
1316 | if (!cls_session) |
1317 | return NULL; |
1318 | |
1319 | if (bnx2i_setup_cmd_pool(hba, session: cls_session->dd_data)) |
1320 | goto session_teardown; |
1321 | return cls_session; |
1322 | |
1323 | session_teardown: |
1324 | iscsi_session_teardown(cls_session); |
1325 | return NULL; |
1326 | } |
1327 | |
1328 | |
1329 | /** |
1330 | * bnx2i_session_destroy - destroys iscsi session |
1331 | * @cls_session: pointer to iscsi cls session |
1332 | * |
1333 | * Destroys previously created iSCSI session instance and releases |
1334 | * all resources held by it |
1335 | */ |
1336 | static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) |
1337 | { |
1338 | struct iscsi_session *session = cls_session->dd_data; |
1339 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
1340 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
1341 | |
1342 | bnx2i_destroy_cmd_pool(hba, session); |
1343 | iscsi_session_teardown(cls_session); |
1344 | } |
1345 | |
1346 | |
1347 | /** |
1348 | * bnx2i_conn_create - create iscsi connection instance |
1349 | * @cls_session: pointer to iscsi cls session |
1350 | * @cid: iscsi cid as per rfc (not NX2's CID terminology) |
1351 | * |
1352 | * Creates a new iSCSI connection instance for a given session |
1353 | */ |
1354 | static struct iscsi_cls_conn * |
1355 | bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) |
1356 | { |
1357 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
1358 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
1359 | struct bnx2i_conn *bnx2i_conn; |
1360 | struct iscsi_cls_conn *cls_conn; |
1361 | struct iscsi_conn *conn; |
1362 | |
1363 | cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), |
1364 | cid); |
1365 | if (!cls_conn) |
1366 | return NULL; |
1367 | conn = cls_conn->dd_data; |
1368 | |
1369 | bnx2i_conn = conn->dd_data; |
1370 | bnx2i_conn->cls_conn = cls_conn; |
1371 | bnx2i_conn->hba = hba; |
1372 | |
1373 | atomic_set(v: &bnx2i_conn->work_cnt, i: 0); |
1374 | |
1375 | /* 'ep' ptr will be assigned in bind() call */ |
1376 | bnx2i_conn->ep = NULL; |
1377 | init_completion(x: &bnx2i_conn->cmd_cleanup_cmpl); |
1378 | |
1379 | if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { |
1380 | iscsi_conn_printk(KERN_ALERT, conn, |
1381 | "conn_new: login resc alloc failed!!\n" ); |
1382 | goto free_conn; |
1383 | } |
1384 | |
1385 | return cls_conn; |
1386 | |
1387 | free_conn: |
1388 | iscsi_conn_teardown(cls_conn); |
1389 | return NULL; |
1390 | } |
1391 | |
1392 | /** |
1393 | * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together |
1394 | * @cls_session: pointer to iscsi cls session |
1395 | * @cls_conn: pointer to iscsi cls conn |
1396 | * @transport_fd: 64-bit EP handle |
1397 | * @is_leading: leading connection on this session? |
1398 | * |
1399 | * Binds together iSCSI session instance, iSCSI connection instance |
1400 | * and the TCP connection. This routine returns error code if |
1401 | * TCP connection does not belong on the device iSCSI sess/conn |
1402 | * is bound |
1403 | */ |
1404 | static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, |
1405 | struct iscsi_cls_conn *cls_conn, |
1406 | uint64_t transport_fd, int is_leading) |
1407 | { |
1408 | struct iscsi_conn *conn = cls_conn->dd_data; |
1409 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1410 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
1411 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
1412 | struct bnx2i_endpoint *bnx2i_ep; |
1413 | struct iscsi_endpoint *ep; |
1414 | int ret_code; |
1415 | |
1416 | ep = iscsi_lookup_endpoint(handle: transport_fd); |
1417 | if (!ep) |
1418 | return -EINVAL; |
1419 | /* |
1420 | * Forcefully terminate all in progress connection recovery at the |
1421 | * earliest, either in bind(), send_pdu(LOGIN), or conn_start() |
1422 | */ |
1423 | if (bnx2i_adapter_ready(hba)) { |
1424 | ret_code = -EIO; |
1425 | goto put_ep; |
1426 | } |
1427 | |
1428 | bnx2i_ep = ep->dd_data; |
1429 | if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || |
1430 | (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) { |
1431 | /* Peer disconnect via' FIN or RST */ |
1432 | ret_code = -EINVAL; |
1433 | goto put_ep; |
1434 | } |
1435 | |
1436 | if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) { |
1437 | ret_code = -EINVAL; |
1438 | goto put_ep; |
1439 | } |
1440 | |
1441 | if (bnx2i_ep->hba != hba) { |
1442 | /* Error - TCP connection does not belong to this device |
1443 | */ |
1444 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, |
1445 | "conn bind, ep=0x%p (%s) does not" , |
1446 | bnx2i_ep, bnx2i_ep->hba->netdev->name); |
1447 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, |
1448 | "belong to hba (%s)\n" , |
1449 | hba->netdev->name); |
1450 | ret_code = -EEXIST; |
1451 | goto put_ep; |
1452 | } |
1453 | bnx2i_ep->conn = bnx2i_conn; |
1454 | bnx2i_conn->ep = bnx2i_ep; |
1455 | bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; |
1456 | bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; |
1457 | |
1458 | ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, |
1459 | iscsi_cid: bnx2i_ep->ep_iscsi_cid); |
1460 | |
1461 | /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 |
1462 | * driver needs to explicitly replenish RQ index during setup. |
1463 | */ |
1464 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) |
1465 | bnx2i_put_rq_buf(conn: bnx2i_conn, count: 0); |
1466 | |
1467 | bnx2i_arm_cq_event_coalescing(ep: bnx2i_conn->ep, CNIC_ARM_CQE); |
1468 | put_ep: |
1469 | iscsi_put_endpoint(ep); |
1470 | return ret_code; |
1471 | } |
1472 | |
1473 | |
1474 | /** |
1475 | * bnx2i_conn_destroy - destroy iscsi connection instance & release resources |
1476 | * @cls_conn: pointer to iscsi cls conn |
1477 | * |
1478 | * Destroy an iSCSI connection instance and release memory resources held by |
1479 | * this connection |
1480 | */ |
1481 | static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) |
1482 | { |
1483 | struct iscsi_conn *conn = cls_conn->dd_data; |
1484 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1485 | struct Scsi_Host *shost; |
1486 | struct bnx2i_hba *hba; |
1487 | struct bnx2i_work *work, *tmp; |
1488 | unsigned cpu = 0; |
1489 | struct bnx2i_percpu_s *p; |
1490 | |
1491 | shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); |
1492 | hba = iscsi_host_priv(shost); |
1493 | |
1494 | bnx2i_conn_free_login_resources(hba, bnx2i_conn); |
1495 | |
1496 | if (atomic_read(v: &bnx2i_conn->work_cnt)) { |
1497 | for_each_online_cpu(cpu) { |
1498 | p = &per_cpu(bnx2i_percpu, cpu); |
1499 | spin_lock_bh(lock: &p->p_work_lock); |
1500 | list_for_each_entry_safe(work, tmp, |
1501 | &p->work_list, list) { |
1502 | if (work->session == conn->session && |
1503 | work->bnx2i_conn == bnx2i_conn) { |
1504 | list_del_init(entry: &work->list); |
1505 | kfree(objp: work); |
1506 | if (!atomic_dec_and_test( |
1507 | v: &bnx2i_conn->work_cnt)) |
1508 | break; |
1509 | } |
1510 | } |
1511 | spin_unlock_bh(lock: &p->p_work_lock); |
1512 | } |
1513 | } |
1514 | |
1515 | iscsi_conn_teardown(cls_conn); |
1516 | } |
1517 | |
1518 | |
1519 | /** |
1520 | * bnx2i_ep_get_param - return iscsi ep parameter to caller |
1521 | * @ep: pointer to iscsi endpoint |
1522 | * @param: parameter type identifier |
1523 | * @buf: buffer pointer |
1524 | * |
1525 | * returns iSCSI ep parameters |
1526 | */ |
1527 | static int bnx2i_ep_get_param(struct iscsi_endpoint *ep, |
1528 | enum iscsi_param param, char *buf) |
1529 | { |
1530 | struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; |
1531 | struct bnx2i_hba *hba = bnx2i_ep->hba; |
1532 | int len = -ENOTCONN; |
1533 | |
1534 | if (!hba) |
1535 | return -ENOTCONN; |
1536 | |
1537 | switch (param) { |
1538 | case ISCSI_PARAM_CONN_PORT: |
1539 | mutex_lock(&hba->net_dev_lock); |
1540 | if (bnx2i_ep->cm_sk) |
1541 | len = sprintf(buf, fmt: "%hu\n" , bnx2i_ep->cm_sk->dst_port); |
1542 | mutex_unlock(lock: &hba->net_dev_lock); |
1543 | break; |
1544 | case ISCSI_PARAM_CONN_ADDRESS: |
1545 | mutex_lock(&hba->net_dev_lock); |
1546 | if (bnx2i_ep->cm_sk) |
1547 | len = sprintf(buf, fmt: "%pI4\n" , &bnx2i_ep->cm_sk->dst_ip); |
1548 | mutex_unlock(lock: &hba->net_dev_lock); |
1549 | break; |
1550 | default: |
1551 | return -ENOSYS; |
1552 | } |
1553 | |
1554 | return len; |
1555 | } |
1556 | |
1557 | /** |
1558 | * bnx2i_host_get_param - returns host (adapter) related parameters |
1559 | * @shost: scsi host pointer |
1560 | * @param: parameter type identifier |
1561 | * @buf: buffer pointer |
1562 | */ |
1563 | static int bnx2i_host_get_param(struct Scsi_Host *shost, |
1564 | enum iscsi_host_param param, char *buf) |
1565 | { |
1566 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
1567 | int len = 0; |
1568 | |
1569 | switch (param) { |
1570 | case ISCSI_HOST_PARAM_HWADDRESS: |
1571 | len = sysfs_format_mac(buf, addr: hba->cnic->mac_addr, len: 6); |
1572 | break; |
1573 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
1574 | len = sprintf(buf, fmt: "%s\n" , hba->netdev->name); |
1575 | break; |
1576 | case ISCSI_HOST_PARAM_IPADDRESS: { |
1577 | struct list_head *active_list = &hba->ep_active_list; |
1578 | |
1579 | read_lock_bh(&hba->ep_rdwr_lock); |
1580 | if (!list_empty(head: &hba->ep_active_list)) { |
1581 | struct bnx2i_endpoint *bnx2i_ep; |
1582 | struct cnic_sock *csk; |
1583 | |
1584 | bnx2i_ep = list_first_entry(active_list, |
1585 | struct bnx2i_endpoint, |
1586 | link); |
1587 | csk = bnx2i_ep->cm_sk; |
1588 | if (test_bit(SK_F_IPV6, &csk->flags)) |
1589 | len = sprintf(buf, fmt: "%pI6\n" , csk->src_ip); |
1590 | else |
1591 | len = sprintf(buf, fmt: "%pI4\n" , csk->src_ip); |
1592 | } |
1593 | read_unlock_bh(&hba->ep_rdwr_lock); |
1594 | break; |
1595 | } |
1596 | default: |
1597 | return iscsi_host_get_param(shost, param, buf); |
1598 | } |
1599 | return len; |
1600 | } |
1601 | |
1602 | /** |
1603 | * bnx2i_conn_start - completes iscsi connection migration to FFP |
1604 | * @cls_conn: pointer to iscsi cls conn |
1605 | * |
1606 | * last call in FFP migration to handover iscsi conn to the driver |
1607 | */ |
1608 | static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) |
1609 | { |
1610 | struct iscsi_conn *conn = cls_conn->dd_data; |
1611 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
1612 | |
1613 | bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; |
1614 | bnx2i_update_iscsi_conn(conn); |
1615 | |
1616 | /* |
1617 | * this should normally not sleep for a long time so it should |
1618 | * not disrupt the caller. |
1619 | */ |
1620 | timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0); |
1621 | bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; |
1622 | add_timer(timer: &bnx2i_conn->ep->ofld_timer); |
1623 | /* update iSCSI context for this conn, wait for CNIC to complete */ |
1624 | wait_event_interruptible(bnx2i_conn->ep->ofld_wait, |
1625 | bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); |
1626 | |
1627 | if (signal_pending(current)) |
1628 | flush_signals(current); |
1629 | del_timer_sync(timer: &bnx2i_conn->ep->ofld_timer); |
1630 | |
1631 | iscsi_conn_start(cls_conn); |
1632 | return 0; |
1633 | } |
1634 | |
1635 | |
1636 | /** |
1637 | * bnx2i_conn_get_stats - returns iSCSI stats |
1638 | * @cls_conn: pointer to iscsi cls conn |
1639 | * @stats: pointer to iscsi statistic struct |
1640 | */ |
1641 | static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
1642 | struct iscsi_stats *stats) |
1643 | { |
1644 | struct iscsi_conn *conn = cls_conn->dd_data; |
1645 | |
1646 | stats->txdata_octets = conn->txdata_octets; |
1647 | stats->rxdata_octets = conn->rxdata_octets; |
1648 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; |
1649 | stats->dataout_pdus = conn->dataout_pdus_cnt; |
1650 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; |
1651 | stats->datain_pdus = conn->datain_pdus_cnt; |
1652 | stats->r2t_pdus = conn->r2t_pdus_cnt; |
1653 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; |
1654 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; |
1655 | stats->digest_err = 0; |
1656 | stats->timeout_err = 0; |
1657 | strcpy(p: stats->custom[0].desc, q: "eh_abort_cnt" ); |
1658 | stats->custom[0].value = conn->eh_abort_cnt; |
1659 | stats->custom_length = 1; |
1660 | } |
1661 | |
1662 | |
1663 | /** |
1664 | * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices |
1665 | * @dst_addr: target IP address |
1666 | * |
1667 | * check if route resolves to BNX2 device |
1668 | */ |
1669 | static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) |
1670 | { |
1671 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; |
1672 | struct bnx2i_hba *hba; |
1673 | struct cnic_dev *cnic = NULL; |
1674 | |
1675 | hba = get_adapter_list_head(); |
1676 | if (hba && hba->cnic) |
1677 | cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); |
1678 | if (!cnic) { |
1679 | printk(KERN_ALERT "bnx2i: no route," |
1680 | "can't connect using cnic\n" ); |
1681 | goto no_nx2_route; |
1682 | } |
1683 | hba = bnx2i_find_hba_for_cnic(cnic); |
1684 | if (!hba) |
1685 | goto no_nx2_route; |
1686 | |
1687 | if (bnx2i_adapter_ready(hba)) { |
1688 | printk(KERN_ALERT "bnx2i: check route, hba not found\n" ); |
1689 | goto no_nx2_route; |
1690 | } |
1691 | if (hba->netdev->mtu > hba->mtu_supported) { |
1692 | printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n" , |
1693 | hba->netdev->name, hba->netdev->mtu); |
1694 | printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n" , |
1695 | hba->mtu_supported); |
1696 | goto no_nx2_route; |
1697 | } |
1698 | return hba; |
1699 | no_nx2_route: |
1700 | return NULL; |
1701 | } |
1702 | |
1703 | |
1704 | /** |
1705 | * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources |
1706 | * @hba: pointer to adapter instance |
1707 | * @ep: endpoint (transport identifier) structure |
1708 | * |
1709 | * destroys cm_sock structure and on chip iscsi context |
1710 | */ |
1711 | static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, |
1712 | struct bnx2i_endpoint *ep) |
1713 | { |
1714 | if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk) |
1715 | hba->cnic->cm_destroy(ep->cm_sk); |
1716 | |
1717 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && |
1718 | ep->state == EP_STATE_DISCONN_TIMEDOUT) { |
1719 | if (ep->conn && ep->conn->cls_conn && |
1720 | ep->conn->cls_conn->dd_data) { |
1721 | struct iscsi_conn *conn = ep->conn->cls_conn->dd_data; |
1722 | |
1723 | /* Must suspend all rx queue activity for this ep */ |
1724 | set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, addr: &conn->flags); |
1725 | } |
1726 | /* CONN_DISCONNECT timeout may or may not be an issue depending |
1727 | * on what transcribed in TCP layer, different targets behave |
1728 | * differently |
1729 | */ |
1730 | printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, " |
1731 | "please submit GRC Dump, NW/PCIe trace, " |
1732 | "driver msgs to developers for analysis\n" , |
1733 | hba->netdev->name); |
1734 | } |
1735 | |
1736 | ep->state = EP_STATE_CLEANUP_START; |
1737 | timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0); |
1738 | ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; |
1739 | add_timer(timer: &ep->ofld_timer); |
1740 | |
1741 | bnx2i_ep_destroy_list_add(hba, ep); |
1742 | |
1743 | /* destroy iSCSI context, wait for it to complete */ |
1744 | if (bnx2i_send_conn_destroy(hba, ep)) |
1745 | ep->state = EP_STATE_CLEANUP_CMPL; |
1746 | |
1747 | wait_event_interruptible(ep->ofld_wait, |
1748 | (ep->state != EP_STATE_CLEANUP_START)); |
1749 | |
1750 | if (signal_pending(current)) |
1751 | flush_signals(current); |
1752 | del_timer_sync(timer: &ep->ofld_timer); |
1753 | |
1754 | bnx2i_ep_destroy_list_del(hba, ep); |
1755 | |
1756 | if (ep->state != EP_STATE_CLEANUP_CMPL) |
1757 | /* should never happen */ |
1758 | printk(KERN_ALERT "bnx2i - conn destroy failed\n" ); |
1759 | |
1760 | return 0; |
1761 | } |
1762 | |
1763 | |
1764 | /** |
1765 | * bnx2i_ep_connect - establish TCP connection to target portal |
1766 | * @shost: scsi host |
1767 | * @dst_addr: target IP address |
1768 | * @non_blocking: blocking or non-blocking call |
1769 | * |
1770 | * this routine initiates the TCP/IP connection by invoking Option-2 i/f |
1771 | * with l5_core and the CNIC. This is a multi-step process of resolving |
1772 | * route to target, create a iscsi connection context, handshaking with |
1773 | * CNIC module to create/initialize the socket struct and finally |
1774 | * sending down option-2 request to complete TCP 3-way handshake |
1775 | */ |
1776 | static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, |
1777 | struct sockaddr *dst_addr, |
1778 | int non_blocking) |
1779 | { |
1780 | u32 iscsi_cid = BNX2I_CID_RESERVED; |
1781 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; |
1782 | struct sockaddr_in6 *desti6; |
1783 | struct bnx2i_endpoint *bnx2i_ep; |
1784 | struct bnx2i_hba *hba; |
1785 | struct cnic_dev *cnic; |
1786 | struct cnic_sockaddr saddr; |
1787 | struct iscsi_endpoint *ep; |
1788 | int rc = 0; |
1789 | |
1790 | if (shost) { |
1791 | /* driver is given scsi host to work with */ |
1792 | hba = iscsi_host_priv(shost); |
1793 | } else |
1794 | /* |
1795 | * check if the given destination can be reached through |
1796 | * a iscsi capable NetXtreme2 device |
1797 | */ |
1798 | hba = bnx2i_check_route(dst_addr); |
1799 | |
1800 | if (!hba) { |
1801 | rc = -EINVAL; |
1802 | goto nohba; |
1803 | } |
1804 | mutex_lock(&hba->net_dev_lock); |
1805 | |
1806 | if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) { |
1807 | rc = -EPERM; |
1808 | goto check_busy; |
1809 | } |
1810 | cnic = hba->cnic; |
1811 | ep = bnx2i_alloc_ep(hba); |
1812 | if (!ep) { |
1813 | rc = -ENOMEM; |
1814 | goto check_busy; |
1815 | } |
1816 | bnx2i_ep = ep->dd_data; |
1817 | |
1818 | atomic_set(v: &bnx2i_ep->num_active_cmds, i: 0); |
1819 | iscsi_cid = bnx2i_alloc_iscsi_cid(hba); |
1820 | if (iscsi_cid == -1) { |
1821 | printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate " |
1822 | "iscsi cid\n" , hba->netdev->name); |
1823 | rc = -ENOMEM; |
1824 | bnx2i_free_ep(ep); |
1825 | goto check_busy; |
1826 | } |
1827 | bnx2i_ep->hba_age = hba->age; |
1828 | |
1829 | rc = bnx2i_alloc_qp_resc(hba, ep: bnx2i_ep); |
1830 | if (rc != 0) { |
1831 | printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error" |
1832 | "\n" , hba->netdev->name); |
1833 | rc = -ENOMEM; |
1834 | goto qp_resc_err; |
1835 | } |
1836 | |
1837 | bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; |
1838 | bnx2i_ep->state = EP_STATE_OFLD_START; |
1839 | bnx2i_ep_ofld_list_add(hba, ep: bnx2i_ep); |
1840 | |
1841 | timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0); |
1842 | bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; |
1843 | add_timer(timer: &bnx2i_ep->ofld_timer); |
1844 | |
1845 | if (bnx2i_send_conn_ofld_req(hba, ep: bnx2i_ep)) { |
1846 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { |
1847 | printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n" , |
1848 | hba->netdev->name, bnx2i_ep->ep_iscsi_cid); |
1849 | rc = -EBUSY; |
1850 | } else |
1851 | rc = -ENOSPC; |
1852 | printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe" |
1853 | "\n" , hba->netdev->name); |
1854 | bnx2i_ep_ofld_list_del(hba, ep: bnx2i_ep); |
1855 | goto conn_failed; |
1856 | } |
1857 | |
1858 | /* Wait for CNIC hardware to setup conn context and return 'cid' */ |
1859 | wait_event_interruptible(bnx2i_ep->ofld_wait, |
1860 | bnx2i_ep->state != EP_STATE_OFLD_START); |
1861 | |
1862 | if (signal_pending(current)) |
1863 | flush_signals(current); |
1864 | del_timer_sync(timer: &bnx2i_ep->ofld_timer); |
1865 | |
1866 | bnx2i_ep_ofld_list_del(hba, ep: bnx2i_ep); |
1867 | |
1868 | if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { |
1869 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { |
1870 | printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n" , |
1871 | hba->netdev->name, bnx2i_ep->ep_iscsi_cid); |
1872 | rc = -EBUSY; |
1873 | } else |
1874 | rc = -ENOSPC; |
1875 | goto conn_failed; |
1876 | } |
1877 | |
1878 | rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, |
1879 | iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); |
1880 | if (rc) { |
1881 | rc = -EINVAL; |
1882 | /* Need to terminate and cleanup the connection */ |
1883 | goto release_ep; |
1884 | } |
1885 | |
1886 | bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; |
1887 | bnx2i_ep->cm_sk->snd_buf = 256 * 1024; |
1888 | clear_bit(SK_TCP_TIMESTAMP, addr: &bnx2i_ep->cm_sk->tcp_flags); |
1889 | |
1890 | memset(&saddr, 0, sizeof(saddr)); |
1891 | if (dst_addr->sa_family == AF_INET) { |
1892 | desti = (struct sockaddr_in *) dst_addr; |
1893 | saddr.remote.v4 = *desti; |
1894 | saddr.local.v4.sin_family = desti->sin_family; |
1895 | } else if (dst_addr->sa_family == AF_INET6) { |
1896 | desti6 = (struct sockaddr_in6 *) dst_addr; |
1897 | saddr.remote.v6 = *desti6; |
1898 | saddr.local.v6.sin6_family = desti6->sin6_family; |
1899 | } |
1900 | |
1901 | bnx2i_ep->timestamp = jiffies; |
1902 | bnx2i_ep->state = EP_STATE_CONNECT_START; |
1903 | if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
1904 | rc = -EINVAL; |
1905 | goto conn_failed; |
1906 | } else |
1907 | rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); |
1908 | if (rc) |
1909 | goto release_ep; |
1910 | |
1911 | bnx2i_ep_active_list_add(hba, ep: bnx2i_ep); |
1912 | |
1913 | rc = bnx2i_map_ep_dbell_regs(ep: bnx2i_ep); |
1914 | if (rc) |
1915 | goto del_active_ep; |
1916 | |
1917 | mutex_unlock(lock: &hba->net_dev_lock); |
1918 | return ep; |
1919 | |
1920 | del_active_ep: |
1921 | bnx2i_ep_active_list_del(hba, ep: bnx2i_ep); |
1922 | release_ep: |
1923 | if (bnx2i_tear_down_conn(hba, ep: bnx2i_ep)) { |
1924 | mutex_unlock(lock: &hba->net_dev_lock); |
1925 | return ERR_PTR(error: rc); |
1926 | } |
1927 | conn_failed: |
1928 | bnx2i_free_qp_resc(hba, ep: bnx2i_ep); |
1929 | qp_resc_err: |
1930 | bnx2i_free_ep(ep); |
1931 | check_busy: |
1932 | mutex_unlock(lock: &hba->net_dev_lock); |
1933 | nohba: |
1934 | return ERR_PTR(error: rc); |
1935 | } |
1936 | |
1937 | |
1938 | /** |
1939 | * bnx2i_ep_poll - polls for TCP connection establishement |
1940 | * @ep: TCP connection (endpoint) handle |
1941 | * @timeout_ms: timeout value in milli secs |
1942 | * |
1943 | * polls for TCP connect request to complete |
1944 | */ |
1945 | static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
1946 | { |
1947 | struct bnx2i_endpoint *bnx2i_ep; |
1948 | int rc = 0; |
1949 | |
1950 | bnx2i_ep = ep->dd_data; |
1951 | if ((bnx2i_ep->state == EP_STATE_IDLE) || |
1952 | (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || |
1953 | (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) |
1954 | return -1; |
1955 | if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) |
1956 | return 1; |
1957 | |
1958 | rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, |
1959 | ((bnx2i_ep->state == |
1960 | EP_STATE_OFLD_FAILED) || |
1961 | (bnx2i_ep->state == |
1962 | EP_STATE_CONNECT_FAILED) || |
1963 | (bnx2i_ep->state == |
1964 | EP_STATE_CONNECT_COMPL)), |
1965 | msecs_to_jiffies(timeout_ms)); |
1966 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED) |
1967 | rc = -1; |
1968 | |
1969 | if (rc > 0) |
1970 | return 1; |
1971 | else if (!rc) |
1972 | return 0; /* timeout */ |
1973 | else |
1974 | return rc; |
1975 | } |
1976 | |
1977 | |
1978 | /** |
1979 | * bnx2i_ep_tcp_conn_active - check EP state transition |
1980 | * @bnx2i_ep: endpoint pointer |
1981 | * |
1982 | * check if underlying TCP connection is active |
1983 | */ |
1984 | static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) |
1985 | { |
1986 | int ret; |
1987 | int cnic_dev_10g = 0; |
1988 | |
1989 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) |
1990 | cnic_dev_10g = 1; |
1991 | |
1992 | switch (bnx2i_ep->state) { |
1993 | case EP_STATE_CLEANUP_FAILED: |
1994 | case EP_STATE_OFLD_FAILED: |
1995 | case EP_STATE_DISCONN_TIMEDOUT: |
1996 | ret = 0; |
1997 | break; |
1998 | case EP_STATE_CONNECT_START: |
1999 | case EP_STATE_CONNECT_FAILED: |
2000 | case EP_STATE_CONNECT_COMPL: |
2001 | case EP_STATE_ULP_UPDATE_START: |
2002 | case EP_STATE_ULP_UPDATE_COMPL: |
2003 | case EP_STATE_TCP_FIN_RCVD: |
2004 | case EP_STATE_LOGOUT_SENT: |
2005 | case EP_STATE_LOGOUT_RESP_RCVD: |
2006 | case EP_STATE_ULP_UPDATE_FAILED: |
2007 | ret = 1; |
2008 | break; |
2009 | case EP_STATE_TCP_RST_RCVD: |
2010 | if (cnic_dev_10g) |
2011 | ret = 0; |
2012 | else |
2013 | ret = 1; |
2014 | break; |
2015 | default: |
2016 | ret = 0; |
2017 | } |
2018 | |
2019 | return ret; |
2020 | } |
2021 | |
2022 | |
2023 | /** |
2024 | * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw |
2025 | * @bnx2i_ep: TCP connection (bnx2i endpoint) handle |
2026 | * |
2027 | * executes TCP connection teardown process |
2028 | */ |
2029 | int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) |
2030 | { |
2031 | struct bnx2i_hba *hba = bnx2i_ep->hba; |
2032 | struct cnic_dev *cnic; |
2033 | struct iscsi_session *session = NULL; |
2034 | struct iscsi_conn *conn = NULL; |
2035 | int ret = 0; |
2036 | int close = 0; |
2037 | int close_ret = 0; |
2038 | |
2039 | if (!hba) |
2040 | return 0; |
2041 | |
2042 | cnic = hba->cnic; |
2043 | if (!cnic) |
2044 | return 0; |
2045 | |
2046 | if (bnx2i_ep->state == EP_STATE_IDLE || |
2047 | bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) |
2048 | return 0; |
2049 | |
2050 | if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) |
2051 | goto destroy_conn; |
2052 | |
2053 | if (bnx2i_ep->conn) { |
2054 | conn = bnx2i_ep->conn->cls_conn->dd_data; |
2055 | session = conn->session; |
2056 | } |
2057 | |
2058 | timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0); |
2059 | bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; |
2060 | add_timer(timer: &bnx2i_ep->ofld_timer); |
2061 | |
2062 | if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) |
2063 | goto out; |
2064 | |
2065 | if (session) { |
2066 | spin_lock_bh(lock: &session->frwd_lock); |
2067 | if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) { |
2068 | if (session->state == ISCSI_STATE_LOGGING_OUT) { |
2069 | if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) { |
2070 | /* Logout sent, but no resp */ |
2071 | printk(KERN_ALERT "bnx2i (%s): WARNING" |
2072 | " logout response was not " |
2073 | "received!\n" , |
2074 | bnx2i_ep->hba->netdev->name); |
2075 | } else if (bnx2i_ep->state == |
2076 | EP_STATE_LOGOUT_RESP_RCVD) |
2077 | close = 1; |
2078 | } |
2079 | } else |
2080 | close = 1; |
2081 | |
2082 | spin_unlock_bh(lock: &session->frwd_lock); |
2083 | } |
2084 | |
2085 | bnx2i_ep->state = EP_STATE_DISCONN_START; |
2086 | |
2087 | if (close) |
2088 | close_ret = cnic->cm_close(bnx2i_ep->cm_sk); |
2089 | else |
2090 | close_ret = cnic->cm_abort(bnx2i_ep->cm_sk); |
2091 | |
2092 | if (close_ret) |
2093 | printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n" , |
2094 | bnx2i_ep->hba->netdev->name, close, close_ret); |
2095 | else |
2096 | /* wait for option-2 conn teardown */ |
2097 | wait_event_interruptible(bnx2i_ep->ofld_wait, |
2098 | ((bnx2i_ep->state != EP_STATE_DISCONN_START) |
2099 | && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD))); |
2100 | |
2101 | if (signal_pending(current)) |
2102 | flush_signals(current); |
2103 | del_timer_sync(timer: &bnx2i_ep->ofld_timer); |
2104 | |
2105 | destroy_conn: |
2106 | bnx2i_ep_active_list_del(hba, ep: bnx2i_ep); |
2107 | if (bnx2i_tear_down_conn(hba, ep: bnx2i_ep)) |
2108 | return -EINVAL; |
2109 | out: |
2110 | bnx2i_ep->state = EP_STATE_IDLE; |
2111 | return ret; |
2112 | } |
2113 | |
2114 | |
2115 | /** |
2116 | * bnx2i_ep_disconnect - executes TCP connection teardown process |
2117 | * @ep: TCP connection (iscsi endpoint) handle |
2118 | * |
2119 | * executes TCP connection teardown process |
2120 | */ |
2121 | static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) |
2122 | { |
2123 | struct bnx2i_endpoint *bnx2i_ep; |
2124 | struct bnx2i_conn *bnx2i_conn = NULL; |
2125 | struct bnx2i_hba *hba; |
2126 | |
2127 | bnx2i_ep = ep->dd_data; |
2128 | |
2129 | /* driver should not attempt connection cleanup until TCP_CONNECT |
2130 | * completes either successfully or fails. Timeout is 9-secs, so |
2131 | * wait for it to complete |
2132 | */ |
2133 | while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && |
2134 | !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) |
2135 | msleep(msecs: 250); |
2136 | |
2137 | if (bnx2i_ep->conn) |
2138 | bnx2i_conn = bnx2i_ep->conn; |
2139 | hba = bnx2i_ep->hba; |
2140 | |
2141 | mutex_lock(&hba->net_dev_lock); |
2142 | |
2143 | if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) |
2144 | goto out; |
2145 | |
2146 | if (bnx2i_ep->state == EP_STATE_IDLE) |
2147 | goto free_resc; |
2148 | |
2149 | if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || |
2150 | (bnx2i_ep->hba_age != hba->age)) { |
2151 | bnx2i_ep_active_list_del(hba, ep: bnx2i_ep); |
2152 | goto free_resc; |
2153 | } |
2154 | |
2155 | /* Do all chip cleanup here */ |
2156 | if (bnx2i_hw_ep_disconnect(bnx2i_ep)) { |
2157 | mutex_unlock(lock: &hba->net_dev_lock); |
2158 | return; |
2159 | } |
2160 | free_resc: |
2161 | bnx2i_free_qp_resc(hba, ep: bnx2i_ep); |
2162 | |
2163 | if (bnx2i_conn) |
2164 | bnx2i_conn->ep = NULL; |
2165 | |
2166 | bnx2i_free_ep(ep); |
2167 | out: |
2168 | mutex_unlock(lock: &hba->net_dev_lock); |
2169 | |
2170 | wake_up_interruptible(&hba->eh_wait); |
2171 | } |
2172 | |
2173 | |
2174 | /** |
2175 | * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler |
2176 | * @shost: scsi host pointer |
2177 | * @params: pointer to buffer containing iscsi path message |
2178 | */ |
2179 | static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) |
2180 | { |
2181 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
2182 | char *buf = (char *) params; |
2183 | u16 len = sizeof(*params); |
2184 | |
2185 | /* handled by cnic driver */ |
2186 | hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, |
2187 | len); |
2188 | |
2189 | return 0; |
2190 | } |
2191 | |
2192 | static umode_t bnx2i_attr_is_visible(int param_type, int param) |
2193 | { |
2194 | switch (param_type) { |
2195 | case ISCSI_HOST_PARAM: |
2196 | switch (param) { |
2197 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
2198 | case ISCSI_HOST_PARAM_HWADDRESS: |
2199 | case ISCSI_HOST_PARAM_IPADDRESS: |
2200 | return S_IRUGO; |
2201 | default: |
2202 | return 0; |
2203 | } |
2204 | case ISCSI_PARAM: |
2205 | switch (param) { |
2206 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
2207 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
2208 | case ISCSI_PARAM_HDRDGST_EN: |
2209 | case ISCSI_PARAM_DATADGST_EN: |
2210 | case ISCSI_PARAM_CONN_ADDRESS: |
2211 | case ISCSI_PARAM_CONN_PORT: |
2212 | case ISCSI_PARAM_EXP_STATSN: |
2213 | case ISCSI_PARAM_PERSISTENT_ADDRESS: |
2214 | case ISCSI_PARAM_PERSISTENT_PORT: |
2215 | case ISCSI_PARAM_PING_TMO: |
2216 | case ISCSI_PARAM_RECV_TMO: |
2217 | case ISCSI_PARAM_INITIAL_R2T_EN: |
2218 | case ISCSI_PARAM_MAX_R2T: |
2219 | case ISCSI_PARAM_IMM_DATA_EN: |
2220 | case ISCSI_PARAM_FIRST_BURST: |
2221 | case ISCSI_PARAM_MAX_BURST: |
2222 | case ISCSI_PARAM_PDU_INORDER_EN: |
2223 | case ISCSI_PARAM_DATASEQ_INORDER_EN: |
2224 | case ISCSI_PARAM_ERL: |
2225 | case ISCSI_PARAM_TARGET_NAME: |
2226 | case ISCSI_PARAM_TPGT: |
2227 | case ISCSI_PARAM_USERNAME: |
2228 | case ISCSI_PARAM_PASSWORD: |
2229 | case ISCSI_PARAM_USERNAME_IN: |
2230 | case ISCSI_PARAM_PASSWORD_IN: |
2231 | case ISCSI_PARAM_FAST_ABORT: |
2232 | case ISCSI_PARAM_ABORT_TMO: |
2233 | case ISCSI_PARAM_LU_RESET_TMO: |
2234 | case ISCSI_PARAM_TGT_RESET_TMO: |
2235 | case ISCSI_PARAM_IFACE_NAME: |
2236 | case ISCSI_PARAM_INITIATOR_NAME: |
2237 | case ISCSI_PARAM_BOOT_ROOT: |
2238 | case ISCSI_PARAM_BOOT_NIC: |
2239 | case ISCSI_PARAM_BOOT_TARGET: |
2240 | return S_IRUGO; |
2241 | default: |
2242 | return 0; |
2243 | } |
2244 | } |
2245 | |
2246 | return 0; |
2247 | } |
2248 | |
2249 | /* |
2250 | * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template |
2251 | * used while registering with the scsi host and iSCSI transport module. |
2252 | */ |
2253 | static const struct scsi_host_template bnx2i_host_template = { |
2254 | .module = THIS_MODULE, |
2255 | .name = "QLogic Offload iSCSI Initiator" , |
2256 | .proc_name = "bnx2i" , |
2257 | .queuecommand = iscsi_queuecommand, |
2258 | .eh_timed_out = iscsi_eh_cmd_timed_out, |
2259 | .eh_abort_handler = iscsi_eh_abort, |
2260 | .eh_device_reset_handler = iscsi_eh_device_reset, |
2261 | .eh_target_reset_handler = iscsi_eh_recover_target, |
2262 | .change_queue_depth = scsi_change_queue_depth, |
2263 | .target_alloc = iscsi_target_alloc, |
2264 | .can_queue = 2048, |
2265 | .max_sectors = 127, |
2266 | .cmd_per_lun = 128, |
2267 | .this_id = -1, |
2268 | .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, |
2269 | .shost_groups = bnx2i_dev_groups, |
2270 | .track_queue_depth = 1, |
2271 | .cmd_size = sizeof(struct iscsi_cmd), |
2272 | }; |
2273 | |
2274 | struct iscsi_transport bnx2i_iscsi_transport = { |
2275 | .owner = THIS_MODULE, |
2276 | .name = "bnx2i" , |
2277 | .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | |
2278 | CAP_MULTI_R2T | CAP_DATADGST | |
2279 | CAP_DATA_PATH_OFFLOAD | |
2280 | CAP_TEXT_NEGO, |
2281 | .create_session = bnx2i_session_create, |
2282 | .destroy_session = bnx2i_session_destroy, |
2283 | .create_conn = bnx2i_conn_create, |
2284 | .bind_conn = bnx2i_conn_bind, |
2285 | .unbind_conn = iscsi_conn_unbind, |
2286 | .destroy_conn = bnx2i_conn_destroy, |
2287 | .attr_is_visible = bnx2i_attr_is_visible, |
2288 | .set_param = iscsi_set_param, |
2289 | .get_conn_param = iscsi_conn_get_param, |
2290 | .get_session_param = iscsi_session_get_param, |
2291 | .get_host_param = bnx2i_host_get_param, |
2292 | .start_conn = bnx2i_conn_start, |
2293 | .stop_conn = iscsi_conn_stop, |
2294 | .send_pdu = iscsi_conn_send_pdu, |
2295 | .xmit_task = bnx2i_task_xmit, |
2296 | .get_stats = bnx2i_conn_get_stats, |
2297 | /* TCP connect - disconnect - option-2 interface calls */ |
2298 | .get_ep_param = bnx2i_ep_get_param, |
2299 | .ep_connect = bnx2i_ep_connect, |
2300 | .ep_poll = bnx2i_ep_poll, |
2301 | .ep_disconnect = bnx2i_ep_disconnect, |
2302 | .set_path = bnx2i_nl_set_path, |
2303 | /* Error recovery timeout call */ |
2304 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
2305 | .cleanup_task = bnx2i_cleanup_task, |
2306 | }; |
2307 | |