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853e2bd2 BG |
1 | /* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver. |
2 | * IO manager and SCSI IO processing. | |
3 | * | |
4 | * Copyright (c) 2008 - 2010 Broadcom Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation. | |
9 | * | |
10 | * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) | |
11 | */ | |
12 | ||
13 | #include "bnx2fc.h" | |
0ea5c275 BG |
14 | |
15 | #define RESERVE_FREE_LIST_INDEX num_possible_cpus() | |
16 | ||
853e2bd2 BG |
17 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, |
18 | int bd_index); | |
19 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); | |
20 | static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); | |
21 | static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, | |
22 | struct bnx2fc_cmd *io_req); | |
23 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); | |
24 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); | |
25 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, | |
26 | struct fcoe_fcp_rsp_payload *fcp_rsp, | |
27 | u8 num_rq); | |
28 | ||
29 | void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, | |
30 | unsigned int timer_msec) | |
31 | { | |
32 | struct bnx2fc_hba *hba = io_req->port->priv; | |
33 | ||
34 | if (queue_delayed_work(hba->timer_work_queue, &io_req->timeout_work, | |
35 | msecs_to_jiffies(timer_msec))) | |
36 | kref_get(&io_req->refcount); | |
37 | } | |
38 | ||
39 | static void bnx2fc_cmd_timeout(struct work_struct *work) | |
40 | { | |
41 | struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, | |
42 | timeout_work.work); | |
43 | struct fc_lport *lport; | |
44 | struct fc_rport_priv *rdata; | |
45 | u8 cmd_type = io_req->cmd_type; | |
46 | struct bnx2fc_rport *tgt = io_req->tgt; | |
47 | int logo_issued; | |
48 | int rc; | |
49 | ||
50 | BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," | |
51 | "req_flags = %lx\n", cmd_type, io_req->req_flags); | |
52 | ||
53 | spin_lock_bh(&tgt->tgt_lock); | |
54 | if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { | |
55 | clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
56 | /* | |
57 | * ideally we should hold the io_req until RRQ complets, | |
58 | * and release io_req from timeout hold. | |
59 | */ | |
60 | spin_unlock_bh(&tgt->tgt_lock); | |
61 | bnx2fc_send_rrq(io_req); | |
62 | return; | |
63 | } | |
64 | if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { | |
65 | BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); | |
66 | goto done; | |
67 | } | |
68 | ||
69 | switch (cmd_type) { | |
70 | case BNX2FC_SCSI_CMD: | |
71 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
72 | &io_req->req_flags)) { | |
73 | /* Handle eh_abort timeout */ | |
74 | BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); | |
75 | complete(&io_req->tm_done); | |
76 | } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
77 | &io_req->req_flags)) { | |
78 | /* Handle internally generated ABTS timeout */ | |
79 | BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", | |
80 | io_req->refcount.refcount.counter); | |
81 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
82 | &io_req->req_flags))) { | |
83 | ||
84 | lport = io_req->port->lport; | |
85 | rdata = io_req->tgt->rdata; | |
86 | logo_issued = test_and_set_bit( | |
87 | BNX2FC_FLAG_EXPL_LOGO, | |
88 | &tgt->flags); | |
89 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
90 | spin_unlock_bh(&tgt->tgt_lock); | |
91 | ||
92 | /* Explicitly logo the target */ | |
93 | if (!logo_issued) { | |
94 | BNX2FC_IO_DBG(io_req, "Explicit " | |
95 | "logo - tgt flags = 0x%lx\n", | |
96 | tgt->flags); | |
97 | ||
98 | mutex_lock(&lport->disc.disc_mutex); | |
99 | lport->tt.rport_logoff(rdata); | |
100 | mutex_unlock(&lport->disc.disc_mutex); | |
101 | } | |
102 | return; | |
103 | } | |
104 | } else { | |
105 | /* Hanlde IO timeout */ | |
106 | BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); | |
107 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, | |
108 | &io_req->req_flags)) { | |
109 | BNX2FC_IO_DBG(io_req, "IO completed before " | |
110 | " timer expiry\n"); | |
111 | goto done; | |
112 | } | |
113 | ||
114 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
115 | &io_req->req_flags)) { | |
116 | rc = bnx2fc_initiate_abts(io_req); | |
117 | if (rc == SUCCESS) | |
118 | goto done; | |
119 | /* | |
120 | * Explicitly logo the target if | |
121 | * abts initiation fails | |
122 | */ | |
123 | lport = io_req->port->lport; | |
124 | rdata = io_req->tgt->rdata; | |
125 | logo_issued = test_and_set_bit( | |
126 | BNX2FC_FLAG_EXPL_LOGO, | |
127 | &tgt->flags); | |
128 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
129 | spin_unlock_bh(&tgt->tgt_lock); | |
130 | ||
131 | if (!logo_issued) { | |
132 | BNX2FC_IO_DBG(io_req, "Explicit " | |
133 | "logo - tgt flags = 0x%lx\n", | |
134 | tgt->flags); | |
135 | ||
136 | ||
137 | mutex_lock(&lport->disc.disc_mutex); | |
138 | lport->tt.rport_logoff(rdata); | |
139 | mutex_unlock(&lport->disc.disc_mutex); | |
140 | } | |
141 | return; | |
142 | } else { | |
143 | BNX2FC_IO_DBG(io_req, "IO already in " | |
144 | "ABTS processing\n"); | |
145 | } | |
146 | } | |
147 | break; | |
148 | case BNX2FC_ELS: | |
149 | ||
150 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { | |
151 | BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); | |
152 | ||
153 | if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
154 | &io_req->req_flags)) { | |
155 | lport = io_req->port->lport; | |
156 | rdata = io_req->tgt->rdata; | |
157 | logo_issued = test_and_set_bit( | |
158 | BNX2FC_FLAG_EXPL_LOGO, | |
159 | &tgt->flags); | |
160 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
161 | spin_unlock_bh(&tgt->tgt_lock); | |
162 | ||
163 | /* Explicitly logo the target */ | |
164 | if (!logo_issued) { | |
165 | BNX2FC_IO_DBG(io_req, "Explicitly logo" | |
166 | "(els)\n"); | |
167 | mutex_lock(&lport->disc.disc_mutex); | |
168 | lport->tt.rport_logoff(rdata); | |
169 | mutex_unlock(&lport->disc.disc_mutex); | |
170 | } | |
171 | return; | |
172 | } | |
173 | } else { | |
174 | /* | |
175 | * Handle ELS timeout. | |
176 | * tgt_lock is used to sync compl path and timeout | |
177 | * path. If els compl path is processing this IO, we | |
178 | * have nothing to do here, just release the timer hold | |
179 | */ | |
180 | BNX2FC_IO_DBG(io_req, "ELS timed out\n"); | |
181 | if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, | |
182 | &io_req->req_flags)) | |
183 | goto done; | |
184 | ||
185 | /* Indicate the cb_func that this ELS is timed out */ | |
186 | set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); | |
187 | ||
188 | if ((io_req->cb_func) && (io_req->cb_arg)) { | |
189 | io_req->cb_func(io_req->cb_arg); | |
190 | io_req->cb_arg = NULL; | |
191 | } | |
192 | } | |
193 | break; | |
194 | default: | |
195 | printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", | |
196 | cmd_type); | |
197 | break; | |
198 | } | |
199 | ||
200 | done: | |
201 | /* release the cmd that was held when timer was set */ | |
202 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
203 | spin_unlock_bh(&tgt->tgt_lock); | |
204 | } | |
205 | ||
206 | static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) | |
207 | { | |
208 | /* Called with host lock held */ | |
209 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
210 | ||
211 | /* | |
212 | * active_cmd_queue may have other command types as well, | |
213 | * and during flush operation, we want to error back only | |
214 | * scsi commands. | |
215 | */ | |
216 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) | |
217 | return; | |
218 | ||
219 | BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); | |
220 | bnx2fc_unmap_sg_list(io_req); | |
221 | io_req->sc_cmd = NULL; | |
222 | if (!sc_cmd) { | |
223 | printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " | |
224 | "IO(0x%x) already cleaned up\n", | |
225 | io_req->xid); | |
226 | return; | |
227 | } | |
228 | sc_cmd->result = err_code << 16; | |
229 | ||
230 | BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", | |
231 | sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, | |
232 | sc_cmd->allowed); | |
233 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); | |
234 | sc_cmd->SCp.ptr = NULL; | |
235 | sc_cmd->scsi_done(sc_cmd); | |
236 | } | |
237 | ||
238 | struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba, | |
239 | u16 min_xid, u16 max_xid) | |
240 | { | |
241 | struct bnx2fc_cmd_mgr *cmgr; | |
242 | struct io_bdt *bdt_info; | |
243 | struct bnx2fc_cmd *io_req; | |
244 | size_t len; | |
245 | u32 mem_size; | |
246 | u16 xid; | |
247 | int i; | |
0ea5c275 | 248 | int num_ios, num_pri_ios; |
853e2bd2 | 249 | size_t bd_tbl_sz; |
0ea5c275 | 250 | int arr_sz = num_possible_cpus() + 1; |
853e2bd2 BG |
251 | |
252 | if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { | |
253 | printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ | |
254 | and max_xid 0x%x\n", min_xid, max_xid); | |
255 | return NULL; | |
256 | } | |
257 | BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); | |
258 | ||
259 | num_ios = max_xid - min_xid + 1; | |
260 | len = (num_ios * (sizeof(struct bnx2fc_cmd *))); | |
261 | len += sizeof(struct bnx2fc_cmd_mgr); | |
262 | ||
263 | cmgr = kzalloc(len, GFP_KERNEL); | |
264 | if (!cmgr) { | |
265 | printk(KERN_ERR PFX "failed to alloc cmgr\n"); | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * | |
0ea5c275 | 270 | arr_sz, GFP_KERNEL); |
853e2bd2 BG |
271 | if (!cmgr->free_list) { |
272 | printk(KERN_ERR PFX "failed to alloc free_list\n"); | |
273 | goto mem_err; | |
274 | } | |
275 | ||
276 | cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * | |
0ea5c275 | 277 | arr_sz, GFP_KERNEL); |
853e2bd2 BG |
278 | if (!cmgr->free_list_lock) { |
279 | printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); | |
280 | goto mem_err; | |
281 | } | |
282 | ||
283 | cmgr->hba = hba; | |
284 | cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); | |
285 | ||
0ea5c275 | 286 | for (i = 0; i < arr_sz; i++) { |
853e2bd2 BG |
287 | INIT_LIST_HEAD(&cmgr->free_list[i]); |
288 | spin_lock_init(&cmgr->free_list_lock[i]); | |
289 | } | |
290 | ||
0ea5c275 BG |
291 | /* |
292 | * Pre-allocated pool of bnx2fc_cmds. | |
293 | * Last entry in the free list array is the free list | |
294 | * of slow path requests. | |
295 | */ | |
853e2bd2 | 296 | xid = BNX2FC_MIN_XID; |
0ea5c275 | 297 | num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS; |
853e2bd2 BG |
298 | for (i = 0; i < num_ios; i++) { |
299 | io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); | |
300 | ||
301 | if (!io_req) { | |
302 | printk(KERN_ERR PFX "failed to alloc io_req\n"); | |
303 | goto mem_err; | |
304 | } | |
305 | ||
306 | INIT_LIST_HEAD(&io_req->link); | |
307 | INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); | |
308 | ||
309 | io_req->xid = xid++; | |
0ea5c275 BG |
310 | if (i < num_pri_ios) |
311 | list_add_tail(&io_req->link, | |
312 | &cmgr->free_list[io_req->xid % | |
313 | num_possible_cpus()]); | |
314 | else | |
315 | list_add_tail(&io_req->link, | |
316 | &cmgr->free_list[num_possible_cpus()]); | |
853e2bd2 BG |
317 | io_req++; |
318 | } | |
319 | ||
320 | /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ | |
321 | mem_size = num_ios * sizeof(struct io_bdt *); | |
322 | cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); | |
323 | if (!cmgr->io_bdt_pool) { | |
324 | printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); | |
325 | goto mem_err; | |
326 | } | |
327 | ||
328 | mem_size = sizeof(struct io_bdt); | |
329 | for (i = 0; i < num_ios; i++) { | |
330 | cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); | |
331 | if (!cmgr->io_bdt_pool[i]) { | |
332 | printk(KERN_ERR PFX "failed to alloc " | |
333 | "io_bdt_pool[%d]\n", i); | |
334 | goto mem_err; | |
335 | } | |
336 | } | |
337 | ||
338 | /* Allocate an map fcoe_bdt_ctx structures */ | |
339 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
340 | for (i = 0; i < num_ios; i++) { | |
341 | bdt_info = cmgr->io_bdt_pool[i]; | |
342 | bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, | |
343 | bd_tbl_sz, | |
344 | &bdt_info->bd_tbl_dma, | |
345 | GFP_KERNEL); | |
346 | if (!bdt_info->bd_tbl) { | |
347 | printk(KERN_ERR PFX "failed to alloc " | |
348 | "bdt_tbl[%d]\n", i); | |
349 | goto mem_err; | |
350 | } | |
351 | } | |
352 | ||
353 | return cmgr; | |
354 | ||
355 | mem_err: | |
356 | bnx2fc_cmd_mgr_free(cmgr); | |
357 | return NULL; | |
358 | } | |
359 | ||
360 | void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) | |
361 | { | |
362 | struct io_bdt *bdt_info; | |
363 | struct bnx2fc_hba *hba = cmgr->hba; | |
364 | size_t bd_tbl_sz; | |
365 | u16 min_xid = BNX2FC_MIN_XID; | |
366 | u16 max_xid = BNX2FC_MAX_XID; | |
367 | int num_ios; | |
368 | int i; | |
369 | ||
370 | num_ios = max_xid - min_xid + 1; | |
371 | ||
372 | /* Free fcoe_bdt_ctx structures */ | |
373 | if (!cmgr->io_bdt_pool) | |
374 | goto free_cmd_pool; | |
375 | ||
376 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
377 | for (i = 0; i < num_ios; i++) { | |
378 | bdt_info = cmgr->io_bdt_pool[i]; | |
379 | if (bdt_info->bd_tbl) { | |
380 | dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, | |
381 | bdt_info->bd_tbl, | |
382 | bdt_info->bd_tbl_dma); | |
383 | bdt_info->bd_tbl = NULL; | |
384 | } | |
385 | } | |
386 | ||
387 | /* Destroy io_bdt pool */ | |
388 | for (i = 0; i < num_ios; i++) { | |
389 | kfree(cmgr->io_bdt_pool[i]); | |
390 | cmgr->io_bdt_pool[i] = NULL; | |
391 | } | |
392 | ||
393 | kfree(cmgr->io_bdt_pool); | |
394 | cmgr->io_bdt_pool = NULL; | |
395 | ||
396 | free_cmd_pool: | |
397 | kfree(cmgr->free_list_lock); | |
398 | ||
399 | /* Destroy cmd pool */ | |
400 | if (!cmgr->free_list) | |
401 | goto free_cmgr; | |
402 | ||
0ea5c275 | 403 | for (i = 0; i < num_possible_cpus() + 1; i++) { |
853e2bd2 BG |
404 | struct list_head *list; |
405 | struct list_head *tmp; | |
406 | ||
407 | list_for_each_safe(list, tmp, &cmgr->free_list[i]) { | |
408 | struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list; | |
409 | list_del(&io_req->link); | |
410 | kfree(io_req); | |
411 | } | |
412 | } | |
413 | kfree(cmgr->free_list); | |
414 | free_cmgr: | |
415 | /* Free command manager itself */ | |
416 | kfree(cmgr); | |
417 | } | |
418 | ||
419 | struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) | |
420 | { | |
421 | struct fcoe_port *port = tgt->port; | |
422 | struct bnx2fc_hba *hba = port->priv; | |
423 | struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr; | |
424 | struct bnx2fc_cmd *io_req; | |
425 | struct list_head *listp; | |
426 | struct io_bdt *bd_tbl; | |
0ea5c275 | 427 | int index = RESERVE_FREE_LIST_INDEX; |
853e2bd2 BG |
428 | u32 max_sqes; |
429 | u16 xid; | |
430 | ||
431 | max_sqes = tgt->max_sqes; | |
432 | switch (type) { | |
433 | case BNX2FC_TASK_MGMT_CMD: | |
434 | max_sqes = BNX2FC_TM_MAX_SQES; | |
435 | break; | |
436 | case BNX2FC_ELS: | |
437 | max_sqes = BNX2FC_ELS_MAX_SQES; | |
438 | break; | |
439 | default: | |
440 | break; | |
441 | } | |
442 | ||
443 | /* | |
444 | * NOTE: Free list insertions and deletions are protected with | |
445 | * cmgr lock | |
446 | */ | |
0ea5c275 BG |
447 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
448 | if ((list_empty(&(cmd_mgr->free_list[index]))) || | |
853e2bd2 BG |
449 | (tgt->num_active_ios.counter >= max_sqes)) { |
450 | BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " | |
451 | "ios(%d):sqes(%d)\n", | |
452 | tgt->num_active_ios.counter, tgt->max_sqes); | |
0ea5c275 | 453 | if (list_empty(&(cmd_mgr->free_list[index]))) |
853e2bd2 | 454 | printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); |
0ea5c275 | 455 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
456 | return NULL; |
457 | } | |
458 | ||
459 | listp = (struct list_head *) | |
0ea5c275 | 460 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
461 | list_del_init(listp); |
462 | io_req = (struct bnx2fc_cmd *) listp; | |
463 | xid = io_req->xid; | |
464 | cmd_mgr->cmds[xid] = io_req; | |
465 | atomic_inc(&tgt->num_active_ios); | |
0ea5c275 | 466 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
467 | |
468 | INIT_LIST_HEAD(&io_req->link); | |
469 | ||
470 | io_req->port = port; | |
471 | io_req->cmd_mgr = cmd_mgr; | |
472 | io_req->req_flags = 0; | |
473 | io_req->cmd_type = type; | |
474 | ||
475 | /* Bind io_bdt for this io_req */ | |
476 | /* Have a static link between io_req and io_bdt_pool */ | |
477 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
478 | bd_tbl->io_req = io_req; | |
479 | ||
480 | /* Hold the io_req against deletion */ | |
481 | kref_init(&io_req->refcount); | |
482 | return io_req; | |
483 | } | |
484 | static struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) | |
485 | { | |
486 | struct fcoe_port *port = tgt->port; | |
487 | struct bnx2fc_hba *hba = port->priv; | |
488 | struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr; | |
489 | struct bnx2fc_cmd *io_req; | |
490 | struct list_head *listp; | |
491 | struct io_bdt *bd_tbl; | |
492 | u32 max_sqes; | |
493 | u16 xid; | |
0ea5c275 | 494 | int index = get_cpu(); |
853e2bd2 BG |
495 | |
496 | max_sqes = BNX2FC_SCSI_MAX_SQES; | |
497 | /* | |
498 | * NOTE: Free list insertions and deletions are protected with | |
499 | * cmgr lock | |
500 | */ | |
0ea5c275 BG |
501 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
502 | if ((list_empty(&cmd_mgr->free_list[index])) || | |
853e2bd2 | 503 | (tgt->num_active_ios.counter >= max_sqes)) { |
0ea5c275 BG |
504 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
505 | put_cpu(); | |
853e2bd2 BG |
506 | return NULL; |
507 | } | |
508 | ||
509 | listp = (struct list_head *) | |
0ea5c275 | 510 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
511 | list_del_init(listp); |
512 | io_req = (struct bnx2fc_cmd *) listp; | |
513 | xid = io_req->xid; | |
514 | cmd_mgr->cmds[xid] = io_req; | |
515 | atomic_inc(&tgt->num_active_ios); | |
0ea5c275 BG |
516 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
517 | put_cpu(); | |
853e2bd2 BG |
518 | |
519 | INIT_LIST_HEAD(&io_req->link); | |
520 | ||
521 | io_req->port = port; | |
522 | io_req->cmd_mgr = cmd_mgr; | |
523 | io_req->req_flags = 0; | |
524 | ||
525 | /* Bind io_bdt for this io_req */ | |
526 | /* Have a static link between io_req and io_bdt_pool */ | |
527 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
528 | bd_tbl->io_req = io_req; | |
529 | ||
530 | /* Hold the io_req against deletion */ | |
531 | kref_init(&io_req->refcount); | |
532 | return io_req; | |
533 | } | |
534 | ||
535 | void bnx2fc_cmd_release(struct kref *ref) | |
536 | { | |
537 | struct bnx2fc_cmd *io_req = container_of(ref, | |
538 | struct bnx2fc_cmd, refcount); | |
539 | struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; | |
0ea5c275 BG |
540 | int index; |
541 | ||
542 | if (io_req->cmd_type == BNX2FC_SCSI_CMD) | |
543 | index = io_req->xid % num_possible_cpus(); | |
544 | else | |
545 | index = RESERVE_FREE_LIST_INDEX; | |
853e2bd2 | 546 | |
0ea5c275 BG |
547 | |
548 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); | |
853e2bd2 BG |
549 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
550 | bnx2fc_free_mp_resc(io_req); | |
551 | cmd_mgr->cmds[io_req->xid] = NULL; | |
552 | /* Delete IO from retire queue */ | |
553 | list_del_init(&io_req->link); | |
554 | /* Add it to the free list */ | |
555 | list_add(&io_req->link, | |
0ea5c275 | 556 | &cmd_mgr->free_list[index]); |
853e2bd2 | 557 | atomic_dec(&io_req->tgt->num_active_ios); |
0ea5c275 BG |
558 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
559 | ||
853e2bd2 BG |
560 | } |
561 | ||
562 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) | |
563 | { | |
564 | struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); | |
565 | struct bnx2fc_hba *hba = io_req->port->priv; | |
566 | size_t sz = sizeof(struct fcoe_bd_ctx); | |
567 | ||
568 | /* clear tm flags */ | |
569 | mp_req->tm_flags = 0; | |
570 | if (mp_req->mp_req_bd) { | |
571 | dma_free_coherent(&hba->pcidev->dev, sz, | |
572 | mp_req->mp_req_bd, | |
573 | mp_req->mp_req_bd_dma); | |
574 | mp_req->mp_req_bd = NULL; | |
575 | } | |
576 | if (mp_req->mp_resp_bd) { | |
577 | dma_free_coherent(&hba->pcidev->dev, sz, | |
578 | mp_req->mp_resp_bd, | |
579 | mp_req->mp_resp_bd_dma); | |
580 | mp_req->mp_resp_bd = NULL; | |
581 | } | |
582 | if (mp_req->req_buf) { | |
583 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
584 | mp_req->req_buf, | |
585 | mp_req->req_buf_dma); | |
586 | mp_req->req_buf = NULL; | |
587 | } | |
588 | if (mp_req->resp_buf) { | |
589 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
590 | mp_req->resp_buf, | |
591 | mp_req->resp_buf_dma); | |
592 | mp_req->resp_buf = NULL; | |
593 | } | |
594 | } | |
595 | ||
596 | int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) | |
597 | { | |
598 | struct bnx2fc_mp_req *mp_req; | |
599 | struct fcoe_bd_ctx *mp_req_bd; | |
600 | struct fcoe_bd_ctx *mp_resp_bd; | |
601 | struct bnx2fc_hba *hba = io_req->port->priv; | |
602 | dma_addr_t addr; | |
603 | size_t sz; | |
604 | ||
605 | mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
606 | memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); | |
607 | ||
608 | mp_req->req_len = sizeof(struct fcp_cmnd); | |
609 | io_req->data_xfer_len = mp_req->req_len; | |
610 | mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
611 | &mp_req->req_buf_dma, | |
612 | GFP_ATOMIC); | |
613 | if (!mp_req->req_buf) { | |
614 | printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); | |
615 | bnx2fc_free_mp_resc(io_req); | |
616 | return FAILED; | |
617 | } | |
618 | ||
619 | mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
620 | &mp_req->resp_buf_dma, | |
621 | GFP_ATOMIC); | |
622 | if (!mp_req->resp_buf) { | |
623 | printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); | |
624 | bnx2fc_free_mp_resc(io_req); | |
625 | return FAILED; | |
626 | } | |
627 | memset(mp_req->req_buf, 0, PAGE_SIZE); | |
628 | memset(mp_req->resp_buf, 0, PAGE_SIZE); | |
629 | ||
630 | /* Allocate and map mp_req_bd and mp_resp_bd */ | |
631 | sz = sizeof(struct fcoe_bd_ctx); | |
632 | mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
633 | &mp_req->mp_req_bd_dma, | |
634 | GFP_ATOMIC); | |
635 | if (!mp_req->mp_req_bd) { | |
636 | printk(KERN_ERR PFX "unable to alloc MP req bd\n"); | |
637 | bnx2fc_free_mp_resc(io_req); | |
638 | return FAILED; | |
639 | } | |
640 | mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
641 | &mp_req->mp_resp_bd_dma, | |
642 | GFP_ATOMIC); | |
643 | if (!mp_req->mp_req_bd) { | |
644 | printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); | |
645 | bnx2fc_free_mp_resc(io_req); | |
646 | return FAILED; | |
647 | } | |
648 | /* Fill bd table */ | |
649 | addr = mp_req->req_buf_dma; | |
650 | mp_req_bd = mp_req->mp_req_bd; | |
651 | mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
652 | mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
653 | mp_req_bd->buf_len = PAGE_SIZE; | |
654 | mp_req_bd->flags = 0; | |
655 | ||
656 | /* | |
657 | * MP buffer is either a task mgmt command or an ELS. | |
658 | * So the assumption is that it consumes a single bd | |
659 | * entry in the bd table | |
660 | */ | |
661 | mp_resp_bd = mp_req->mp_resp_bd; | |
662 | addr = mp_req->resp_buf_dma; | |
663 | mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
664 | mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
665 | mp_resp_bd->buf_len = PAGE_SIZE; | |
666 | mp_resp_bd->flags = 0; | |
667 | ||
668 | return SUCCESS; | |
669 | } | |
670 | ||
671 | static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) | |
672 | { | |
673 | struct fc_lport *lport; | |
674 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
675 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
676 | struct fcoe_port *port; | |
677 | struct bnx2fc_hba *hba; | |
678 | struct bnx2fc_rport *tgt; | |
679 | struct bnx2fc_cmd *io_req; | |
680 | struct bnx2fc_mp_req *tm_req; | |
681 | struct fcoe_task_ctx_entry *task; | |
682 | struct fcoe_task_ctx_entry *task_page; | |
683 | struct Scsi_Host *host = sc_cmd->device->host; | |
684 | struct fc_frame_header *fc_hdr; | |
685 | struct fcp_cmnd *fcp_cmnd; | |
686 | int task_idx, index; | |
687 | int rc = SUCCESS; | |
688 | u16 xid; | |
689 | u32 sid, did; | |
690 | unsigned long start = jiffies; | |
691 | ||
692 | lport = shost_priv(host); | |
693 | port = lport_priv(lport); | |
694 | hba = port->priv; | |
695 | ||
696 | if (rport == NULL) { | |
697 | printk(KERN_ALERT PFX "device_reset: rport is NULL\n"); | |
698 | rc = FAILED; | |
699 | goto tmf_err; | |
700 | } | |
701 | ||
702 | rc = fc_block_scsi_eh(sc_cmd); | |
703 | if (rc) | |
704 | return rc; | |
705 | ||
706 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
707 | printk(KERN_ERR PFX "device_reset: link is not ready\n"); | |
708 | rc = FAILED; | |
709 | goto tmf_err; | |
710 | } | |
711 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
712 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
713 | ||
714 | if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { | |
715 | printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); | |
716 | rc = FAILED; | |
717 | goto tmf_err; | |
718 | } | |
719 | retry_tmf: | |
720 | io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); | |
721 | if (!io_req) { | |
722 | if (time_after(jiffies, start + HZ)) { | |
723 | printk(KERN_ERR PFX "tmf: Failed TMF"); | |
724 | rc = FAILED; | |
725 | goto tmf_err; | |
726 | } | |
727 | msleep(20); | |
728 | goto retry_tmf; | |
729 | } | |
730 | /* Initialize rest of io_req fields */ | |
731 | io_req->sc_cmd = sc_cmd; | |
732 | io_req->port = port; | |
733 | io_req->tgt = tgt; | |
734 | ||
735 | tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
736 | ||
737 | rc = bnx2fc_init_mp_req(io_req); | |
738 | if (rc == FAILED) { | |
739 | printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); | |
740 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
741 | goto tmf_err; | |
742 | } | |
743 | ||
744 | /* Set TM flags */ | |
745 | io_req->io_req_flags = 0; | |
746 | tm_req->tm_flags = tm_flags; | |
747 | ||
748 | /* Fill FCP_CMND */ | |
749 | bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); | |
750 | fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; | |
751 | memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); | |
752 | fcp_cmnd->fc_dl = 0; | |
753 | ||
754 | /* Fill FC header */ | |
755 | fc_hdr = &(tm_req->req_fc_hdr); | |
756 | sid = tgt->sid; | |
757 | did = rport->port_id; | |
758 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, | |
759 | FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
760 | FC_FC_SEQ_INIT, 0); | |
761 | /* Obtain exchange id */ | |
762 | xid = io_req->xid; | |
763 | ||
764 | BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); | |
765 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
766 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
767 | ||
768 | /* Initialize task context for this IO request */ | |
769 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
770 | task = &(task_page[index]); | |
771 | bnx2fc_init_mp_task(io_req, task); | |
772 | ||
773 | sc_cmd->SCp.ptr = (char *)io_req; | |
774 | ||
775 | /* Obtain free SQ entry */ | |
776 | spin_lock_bh(&tgt->tgt_lock); | |
777 | bnx2fc_add_2_sq(tgt, xid); | |
778 | ||
779 | /* Enqueue the io_req to active_tm_queue */ | |
780 | io_req->on_tmf_queue = 1; | |
781 | list_add_tail(&io_req->link, &tgt->active_tm_queue); | |
782 | ||
783 | init_completion(&io_req->tm_done); | |
784 | io_req->wait_for_comp = 1; | |
785 | ||
786 | /* Ring doorbell */ | |
787 | bnx2fc_ring_doorbell(tgt); | |
788 | spin_unlock_bh(&tgt->tgt_lock); | |
789 | ||
790 | rc = wait_for_completion_timeout(&io_req->tm_done, | |
791 | BNX2FC_TM_TIMEOUT * HZ); | |
792 | spin_lock_bh(&tgt->tgt_lock); | |
793 | ||
794 | io_req->wait_for_comp = 0; | |
795 | if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) | |
796 | set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); | |
797 | ||
798 | spin_unlock_bh(&tgt->tgt_lock); | |
799 | ||
800 | if (!rc) { | |
801 | printk(KERN_ERR PFX "task mgmt command failed...\n"); | |
802 | rc = FAILED; | |
803 | } else { | |
804 | printk(KERN_ERR PFX "task mgmt command success...\n"); | |
805 | rc = SUCCESS; | |
806 | } | |
807 | tmf_err: | |
808 | return rc; | |
809 | } | |
810 | ||
811 | int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) | |
812 | { | |
813 | struct fc_lport *lport; | |
814 | struct bnx2fc_rport *tgt = io_req->tgt; | |
815 | struct fc_rport *rport = tgt->rport; | |
816 | struct fc_rport_priv *rdata = tgt->rdata; | |
817 | struct bnx2fc_hba *hba; | |
818 | struct fcoe_port *port; | |
819 | struct bnx2fc_cmd *abts_io_req; | |
820 | struct fcoe_task_ctx_entry *task; | |
821 | struct fcoe_task_ctx_entry *task_page; | |
822 | struct fc_frame_header *fc_hdr; | |
823 | struct bnx2fc_mp_req *abts_req; | |
824 | int task_idx, index; | |
825 | u32 sid, did; | |
826 | u16 xid; | |
827 | int rc = SUCCESS; | |
828 | u32 r_a_tov = rdata->r_a_tov; | |
829 | ||
830 | /* called with tgt_lock held */ | |
831 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); | |
832 | ||
833 | port = io_req->port; | |
834 | hba = port->priv; | |
835 | lport = port->lport; | |
836 | ||
837 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
838 | printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); | |
839 | rc = FAILED; | |
840 | goto abts_err; | |
841 | } | |
842 | ||
843 | if (rport == NULL) { | |
844 | printk(KERN_ALERT PFX "initiate_abts: rport is NULL\n"); | |
845 | rc = FAILED; | |
846 | goto abts_err; | |
847 | } | |
848 | ||
849 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
850 | printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); | |
851 | rc = FAILED; | |
852 | goto abts_err; | |
853 | } | |
854 | ||
855 | abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); | |
856 | if (!abts_io_req) { | |
857 | printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); | |
858 | rc = FAILED; | |
859 | goto abts_err; | |
860 | } | |
861 | ||
862 | /* Initialize rest of io_req fields */ | |
863 | abts_io_req->sc_cmd = NULL; | |
864 | abts_io_req->port = port; | |
865 | abts_io_req->tgt = tgt; | |
866 | abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ | |
867 | ||
868 | abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); | |
869 | memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); | |
870 | ||
871 | /* Fill FC header */ | |
872 | fc_hdr = &(abts_req->req_fc_hdr); | |
873 | ||
874 | /* Obtain oxid and rxid for the original exchange to be aborted */ | |
875 | fc_hdr->fh_ox_id = htons(io_req->xid); | |
876 | fc_hdr->fh_rx_id = htons(io_req->task->rx_wr_tx_rd.rx_id); | |
877 | ||
878 | sid = tgt->sid; | |
879 | did = rport->port_id; | |
880 | ||
881 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, | |
882 | FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
883 | FC_FC_SEQ_INIT, 0); | |
884 | ||
885 | xid = abts_io_req->xid; | |
886 | BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); | |
887 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
888 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
889 | ||
890 | /* Initialize task context for this IO request */ | |
891 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
892 | task = &(task_page[index]); | |
893 | bnx2fc_init_mp_task(abts_io_req, task); | |
894 | ||
895 | /* | |
896 | * ABTS task is a temporary task that will be cleaned up | |
897 | * irrespective of ABTS response. We need to start the timer | |
898 | * for the original exchange, as the CQE is posted for the original | |
899 | * IO request. | |
900 | * | |
901 | * Timer for ABTS is started only when it is originated by a | |
902 | * TM request. For the ABTS issued as part of ULP timeout, | |
903 | * scsi-ml maintains the timers. | |
904 | */ | |
905 | ||
906 | /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ | |
907 | bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); | |
908 | ||
909 | /* Obtain free SQ entry */ | |
910 | bnx2fc_add_2_sq(tgt, xid); | |
911 | ||
912 | /* Ring doorbell */ | |
913 | bnx2fc_ring_doorbell(tgt); | |
914 | ||
915 | abts_err: | |
916 | return rc; | |
917 | } | |
918 | ||
919 | int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) | |
920 | { | |
921 | struct fc_lport *lport; | |
922 | struct bnx2fc_rport *tgt = io_req->tgt; | |
923 | struct bnx2fc_hba *hba; | |
924 | struct fcoe_port *port; | |
925 | struct bnx2fc_cmd *cleanup_io_req; | |
926 | struct fcoe_task_ctx_entry *task; | |
927 | struct fcoe_task_ctx_entry *task_page; | |
928 | int task_idx, index; | |
929 | u16 xid, orig_xid; | |
930 | int rc = 0; | |
931 | ||
932 | /* ASSUMPTION: called with tgt_lock held */ | |
933 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); | |
934 | ||
935 | port = io_req->port; | |
936 | hba = port->priv; | |
937 | lport = port->lport; | |
938 | ||
939 | cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); | |
940 | if (!cleanup_io_req) { | |
941 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); | |
942 | rc = -1; | |
943 | goto cleanup_err; | |
944 | } | |
945 | ||
946 | /* Initialize rest of io_req fields */ | |
947 | cleanup_io_req->sc_cmd = NULL; | |
948 | cleanup_io_req->port = port; | |
949 | cleanup_io_req->tgt = tgt; | |
950 | cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ | |
951 | ||
952 | xid = cleanup_io_req->xid; | |
953 | ||
954 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
955 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
956 | ||
957 | /* Initialize task context for this IO request */ | |
958 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
959 | task = &(task_page[index]); | |
960 | orig_xid = io_req->xid; | |
961 | ||
962 | BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); | |
963 | ||
964 | bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); | |
965 | ||
966 | /* Obtain free SQ entry */ | |
967 | bnx2fc_add_2_sq(tgt, xid); | |
968 | ||
969 | /* Ring doorbell */ | |
970 | bnx2fc_ring_doorbell(tgt); | |
971 | ||
972 | cleanup_err: | |
973 | return rc; | |
974 | } | |
975 | ||
976 | /** | |
977 | * bnx2fc_eh_target_reset: Reset a target | |
978 | * | |
979 | * @sc_cmd: SCSI command | |
980 | * | |
981 | * Set from SCSI host template to send task mgmt command to the target | |
982 | * and wait for the response | |
983 | */ | |
984 | int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) | |
985 | { | |
986 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); | |
987 | } | |
988 | ||
989 | /** | |
990 | * bnx2fc_eh_device_reset - Reset a single LUN | |
991 | * | |
992 | * @sc_cmd: SCSI command | |
993 | * | |
994 | * Set from SCSI host template to send task mgmt command to the target | |
995 | * and wait for the response | |
996 | */ | |
997 | int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) | |
998 | { | |
999 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); | |
1000 | } | |
1001 | ||
1002 | /** | |
1003 | * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding | |
1004 | * SCSI command | |
1005 | * | |
1006 | * @sc_cmd: SCSI_ML command pointer | |
1007 | * | |
1008 | * SCSI abort request handler | |
1009 | */ | |
1010 | int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) | |
1011 | { | |
1012 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1013 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1014 | struct bnx2fc_cmd *io_req; | |
1015 | struct fc_lport *lport; | |
1016 | struct bnx2fc_rport *tgt; | |
1017 | int rc = FAILED; | |
1018 | ||
1019 | ||
1020 | rc = fc_block_scsi_eh(sc_cmd); | |
1021 | if (rc) | |
1022 | return rc; | |
1023 | ||
1024 | lport = shost_priv(sc_cmd->device->host); | |
1025 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
1026 | printk(KERN_ALERT PFX "eh_abort: link not ready\n"); | |
1027 | return rc; | |
1028 | } | |
1029 | ||
1030 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1031 | ||
1032 | BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); | |
1033 | ||
1034 | spin_lock_bh(&tgt->tgt_lock); | |
1035 | io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; | |
1036 | if (!io_req) { | |
1037 | /* Command might have just completed */ | |
1038 | printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); | |
1039 | spin_unlock_bh(&tgt->tgt_lock); | |
1040 | return SUCCESS; | |
1041 | } | |
1042 | BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", | |
1043 | io_req->refcount.refcount.counter); | |
1044 | ||
1045 | /* Hold IO request across abort processing */ | |
1046 | kref_get(&io_req->refcount); | |
1047 | ||
1048 | BUG_ON(tgt != io_req->tgt); | |
1049 | ||
1050 | /* Remove the io_req from the active_q. */ | |
1051 | /* | |
1052 | * Task Mgmt functions (LUN RESET & TGT RESET) will not | |
1053 | * issue an ABTS on this particular IO req, as the | |
1054 | * io_req is no longer in the active_q. | |
1055 | */ | |
1056 | if (tgt->flush_in_prog) { | |
1057 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " | |
1058 | "flush in progress\n", io_req->xid); | |
1059 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1060 | spin_unlock_bh(&tgt->tgt_lock); | |
1061 | return SUCCESS; | |
1062 | } | |
1063 | ||
1064 | if (io_req->on_active_queue == 0) { | |
1065 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " | |
1066 | "not on active_q\n", io_req->xid); | |
1067 | /* | |
1068 | * This condition can happen only due to the FW bug, | |
1069 | * where we do not receive cleanup response from | |
1070 | * the FW. Handle this case gracefully by erroring | |
1071 | * back the IO request to SCSI-ml | |
1072 | */ | |
1073 | bnx2fc_scsi_done(io_req, DID_ABORT); | |
1074 | ||
1075 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1076 | spin_unlock_bh(&tgt->tgt_lock); | |
1077 | return SUCCESS; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Only eh_abort processing will remove the IO from | |
1082 | * active_cmd_q before processing the request. this is | |
1083 | * done to avoid race conditions between IOs aborted | |
1084 | * as part of task management completion and eh_abort | |
1085 | * processing | |
1086 | */ | |
1087 | list_del_init(&io_req->link); | |
1088 | io_req->on_active_queue = 0; | |
1089 | /* Move IO req to retire queue */ | |
1090 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1091 | ||
1092 | init_completion(&io_req->tm_done); | |
1093 | io_req->wait_for_comp = 1; | |
1094 | ||
1095 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { | |
1096 | /* Cancel the current timer running on this io_req */ | |
1097 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1098 | kref_put(&io_req->refcount, | |
1099 | bnx2fc_cmd_release); /* drop timer hold */ | |
1100 | set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); | |
1101 | rc = bnx2fc_initiate_abts(io_req); | |
1102 | } else { | |
1103 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " | |
1104 | "already in abts processing\n", io_req->xid); | |
1105 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1106 | spin_unlock_bh(&tgt->tgt_lock); | |
1107 | return SUCCESS; | |
1108 | } | |
1109 | if (rc == FAILED) { | |
1110 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1111 | spin_unlock_bh(&tgt->tgt_lock); | |
1112 | return rc; | |
1113 | } | |
1114 | spin_unlock_bh(&tgt->tgt_lock); | |
1115 | ||
1116 | wait_for_completion(&io_req->tm_done); | |
1117 | ||
1118 | spin_lock_bh(&tgt->tgt_lock); | |
1119 | io_req->wait_for_comp = 0; | |
1120 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1121 | &io_req->req_flags))) { | |
1122 | /* Let the scsi-ml try to recover this command */ | |
1123 | printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", | |
1124 | io_req->xid); | |
1125 | rc = FAILED; | |
1126 | } else { | |
1127 | /* | |
1128 | * We come here even when there was a race condition | |
1129 | * between timeout and abts completion, and abts | |
1130 | * completion happens just in time. | |
1131 | */ | |
1132 | BNX2FC_IO_DBG(io_req, "abort succeeded\n"); | |
1133 | rc = SUCCESS; | |
1134 | bnx2fc_scsi_done(io_req, DID_ABORT); | |
1135 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1136 | } | |
1137 | ||
1138 | /* release the reference taken in eh_abort */ | |
1139 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1140 | spin_unlock_bh(&tgt->tgt_lock); | |
1141 | return rc; | |
1142 | } | |
1143 | ||
1144 | void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, | |
1145 | struct fcoe_task_ctx_entry *task, | |
1146 | u8 num_rq) | |
1147 | { | |
1148 | BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " | |
1149 | "refcnt = %d, cmd_type = %d\n", | |
1150 | io_req->refcount.refcount.counter, io_req->cmd_type); | |
1151 | bnx2fc_scsi_done(io_req, DID_ERROR); | |
1152 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1153 | } | |
1154 | ||
1155 | void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, | |
1156 | struct fcoe_task_ctx_entry *task, | |
1157 | u8 num_rq) | |
1158 | { | |
1159 | u32 r_ctl; | |
1160 | u32 r_a_tov = FC_DEF_R_A_TOV; | |
1161 | u8 issue_rrq = 0; | |
1162 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1163 | ||
1164 | BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" | |
1165 | "refcnt = %d, cmd_type = %d\n", | |
1166 | io_req->xid, | |
1167 | io_req->refcount.refcount.counter, io_req->cmd_type); | |
1168 | ||
1169 | if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1170 | &io_req->req_flags)) { | |
1171 | BNX2FC_IO_DBG(io_req, "Timer context finished processing" | |
1172 | " this io\n"); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | /* Do not issue RRQ as this IO is already cleanedup */ | |
1177 | if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, | |
1178 | &io_req->req_flags)) | |
1179 | goto io_compl; | |
1180 | ||
1181 | /* | |
1182 | * For ABTS issued due to SCSI eh_abort_handler, timeout | |
1183 | * values are maintained by scsi-ml itself. Cancel timeout | |
1184 | * in case ABTS issued as part of task management function | |
1185 | * or due to FW error. | |
1186 | */ | |
1187 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) | |
1188 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1189 | kref_put(&io_req->refcount, | |
1190 | bnx2fc_cmd_release); /* drop timer hold */ | |
1191 | ||
1192 | r_ctl = task->cmn.general.rsp_info.abts_rsp.r_ctl; | |
1193 | ||
1194 | switch (r_ctl) { | |
1195 | case FC_RCTL_BA_ACC: | |
1196 | /* | |
1197 | * Dont release this cmd yet. It will be relesed | |
1198 | * after we get RRQ response | |
1199 | */ | |
1200 | BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); | |
1201 | issue_rrq = 1; | |
1202 | break; | |
1203 | ||
1204 | case FC_RCTL_BA_RJT: | |
1205 | BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); | |
1206 | break; | |
1207 | default: | |
1208 | printk(KERN_ERR PFX "Unknown ABTS response\n"); | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | if (issue_rrq) { | |
1213 | BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); | |
1214 | set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); | |
1215 | } | |
1216 | set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
1217 | bnx2fc_cmd_timer_set(io_req, r_a_tov); | |
1218 | ||
1219 | io_compl: | |
1220 | if (io_req->wait_for_comp) { | |
1221 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1222 | &io_req->req_flags)) | |
1223 | complete(&io_req->tm_done); | |
1224 | } else { | |
1225 | /* | |
1226 | * We end up here when ABTS is issued as | |
1227 | * in asynchronous context, i.e., as part | |
1228 | * of task management completion, or | |
1229 | * when FW error is received or when the | |
1230 | * ABTS is issued when the IO is timed | |
1231 | * out. | |
1232 | */ | |
1233 | ||
1234 | if (io_req->on_active_queue) { | |
1235 | list_del_init(&io_req->link); | |
1236 | io_req->on_active_queue = 0; | |
1237 | /* Move IO req to retire queue */ | |
1238 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1239 | } | |
1240 | bnx2fc_scsi_done(io_req, DID_ERROR); | |
1241 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1246 | { | |
1247 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1248 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1249 | struct list_head *list; | |
1250 | struct list_head *tmp; | |
1251 | struct bnx2fc_cmd *cmd; | |
1252 | int tm_lun = sc_cmd->device->lun; | |
1253 | int rc = 0; | |
1254 | int lun; | |
1255 | ||
1256 | /* called with tgt_lock held */ | |
1257 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); | |
1258 | /* | |
1259 | * Walk thru the active_ios queue and ABORT the IO | |
1260 | * that matches with the LUN that was reset | |
1261 | */ | |
1262 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { | |
1263 | BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); | |
1264 | cmd = (struct bnx2fc_cmd *)list; | |
1265 | lun = cmd->sc_cmd->device->lun; | |
1266 | if (lun == tm_lun) { | |
1267 | /* Initiate ABTS on this cmd */ | |
1268 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1269 | &cmd->req_flags)) { | |
1270 | /* cancel the IO timeout */ | |
1271 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1272 | kref_put(&io_req->refcount, | |
1273 | bnx2fc_cmd_release); | |
1274 | /* timer hold */ | |
1275 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1276 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1277 | WARN_ON(rc != SUCCESS); |
1278 | } else | |
1279 | printk(KERN_ERR PFX "lun_rst: abts already in" | |
1280 | " progress for this IO 0x%x\n", | |
1281 | cmd->xid); | |
1282 | } | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1287 | { | |
1288 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1289 | struct list_head *list; | |
1290 | struct list_head *tmp; | |
1291 | struct bnx2fc_cmd *cmd; | |
1292 | int rc = 0; | |
1293 | ||
1294 | /* called with tgt_lock held */ | |
1295 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); | |
1296 | /* | |
1297 | * Walk thru the active_ios queue and ABORT the IO | |
1298 | * that matches with the LUN that was reset | |
1299 | */ | |
1300 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { | |
1301 | BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); | |
1302 | cmd = (struct bnx2fc_cmd *)list; | |
1303 | /* Initiate ABTS */ | |
1304 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1305 | &cmd->req_flags)) { | |
1306 | /* cancel the IO timeout */ | |
1307 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1308 | kref_put(&io_req->refcount, | |
1309 | bnx2fc_cmd_release); /* timer hold */ | |
1310 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1311 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1312 | WARN_ON(rc != SUCCESS); |
1313 | ||
1314 | } else | |
1315 | printk(KERN_ERR PFX "tgt_rst: abts already in progress" | |
1316 | " for this IO 0x%x\n", cmd->xid); | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, | |
1321 | struct fcoe_task_ctx_entry *task, u8 num_rq) | |
1322 | { | |
1323 | struct bnx2fc_mp_req *tm_req; | |
1324 | struct fc_frame_header *fc_hdr; | |
1325 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1326 | u64 *hdr; | |
1327 | u64 *temp_hdr; | |
1328 | void *rsp_buf; | |
1329 | ||
1330 | /* Called with tgt_lock held */ | |
1331 | BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); | |
1332 | ||
1333 | if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) | |
1334 | set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); | |
1335 | else { | |
1336 | /* TM has already timed out and we got | |
1337 | * delayed completion. Ignore completion | |
1338 | * processing. | |
1339 | */ | |
1340 | return; | |
1341 | } | |
1342 | ||
1343 | tm_req = &(io_req->mp_req); | |
1344 | fc_hdr = &(tm_req->resp_fc_hdr); | |
1345 | hdr = (u64 *)fc_hdr; | |
1346 | temp_hdr = (u64 *) | |
1347 | &task->cmn.general.cmd_info.mp_fc_frame.fc_hdr; | |
1348 | hdr[0] = cpu_to_be64(temp_hdr[0]); | |
1349 | hdr[1] = cpu_to_be64(temp_hdr[1]); | |
1350 | hdr[2] = cpu_to_be64(temp_hdr[2]); | |
1351 | ||
1352 | tm_req->resp_len = task->rx_wr_only.sgl_ctx.mul_sges.cur_sge_off; | |
1353 | ||
1354 | rsp_buf = tm_req->resp_buf; | |
1355 | ||
1356 | if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { | |
1357 | bnx2fc_parse_fcp_rsp(io_req, | |
1358 | (struct fcoe_fcp_rsp_payload *) | |
1359 | rsp_buf, num_rq); | |
1360 | if (io_req->fcp_rsp_code == 0) { | |
1361 | /* TM successful */ | |
1362 | if (tm_req->tm_flags & FCP_TMF_LUN_RESET) | |
1363 | bnx2fc_lun_reset_cmpl(io_req); | |
1364 | else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) | |
1365 | bnx2fc_tgt_reset_cmpl(io_req); | |
1366 | } | |
1367 | } else { | |
1368 | printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", | |
1369 | fc_hdr->fh_r_ctl); | |
1370 | } | |
1371 | if (!sc_cmd->SCp.ptr) { | |
1372 | printk(KERN_ALERT PFX "tm_compl: SCp.ptr is NULL\n"); | |
1373 | return; | |
1374 | } | |
1375 | switch (io_req->fcp_status) { | |
1376 | case FC_GOOD: | |
1377 | if (io_req->cdb_status == 0) { | |
1378 | /* Good IO completion */ | |
1379 | sc_cmd->result = DID_OK << 16; | |
1380 | } else { | |
1381 | /* Transport status is good, SCSI status not good */ | |
1382 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1383 | } | |
1384 | if (io_req->fcp_resid) | |
1385 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1386 | break; | |
1387 | ||
1388 | default: | |
1389 | BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", | |
1390 | io_req->fcp_status); | |
1391 | break; | |
1392 | } | |
1393 | ||
1394 | sc_cmd = io_req->sc_cmd; | |
1395 | io_req->sc_cmd = NULL; | |
1396 | ||
1397 | /* check if the io_req exists in tgt's tmf_q */ | |
1398 | if (io_req->on_tmf_queue) { | |
1399 | ||
1400 | list_del_init(&io_req->link); | |
1401 | io_req->on_tmf_queue = 0; | |
1402 | } else { | |
1403 | ||
1404 | printk(KERN_ALERT PFX "Command not on active_cmd_queue!\n"); | |
1405 | return; | |
1406 | } | |
1407 | ||
1408 | sc_cmd->SCp.ptr = NULL; | |
1409 | sc_cmd->scsi_done(sc_cmd); | |
1410 | ||
1411 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1412 | if (io_req->wait_for_comp) { | |
1413 | BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); | |
1414 | complete(&io_req->tm_done); | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, | |
1419 | int bd_index) | |
1420 | { | |
1421 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1422 | int frag_size, sg_frags; | |
1423 | ||
1424 | sg_frags = 0; | |
1425 | while (sg_len) { | |
1426 | if (sg_len >= BNX2FC_BD_SPLIT_SZ) | |
1427 | frag_size = BNX2FC_BD_SPLIT_SZ; | |
1428 | else | |
1429 | frag_size = sg_len; | |
1430 | bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; | |
1431 | bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; | |
1432 | bd[bd_index + sg_frags].buf_len = (u16)frag_size; | |
1433 | bd[bd_index + sg_frags].flags = 0; | |
1434 | ||
1435 | addr += (u64) frag_size; | |
1436 | sg_frags++; | |
1437 | sg_len -= frag_size; | |
1438 | } | |
1439 | return sg_frags; | |
1440 | ||
1441 | } | |
1442 | ||
1443 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) | |
1444 | { | |
1445 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1446 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1447 | struct scatterlist *sg; | |
1448 | int byte_count = 0; | |
1449 | int sg_count = 0; | |
1450 | int bd_count = 0; | |
1451 | int sg_frags; | |
1452 | unsigned int sg_len; | |
1453 | u64 addr; | |
1454 | int i; | |
1455 | ||
1456 | sg_count = scsi_dma_map(sc); | |
1457 | scsi_for_each_sg(sc, sg, sg_count, i) { | |
1458 | sg_len = sg_dma_len(sg); | |
1459 | addr = sg_dma_address(sg); | |
1460 | if (sg_len > BNX2FC_MAX_BD_LEN) { | |
1461 | sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, | |
1462 | bd_count); | |
1463 | } else { | |
1464 | ||
1465 | sg_frags = 1; | |
1466 | bd[bd_count].buf_addr_lo = addr & 0xffffffff; | |
1467 | bd[bd_count].buf_addr_hi = addr >> 32; | |
1468 | bd[bd_count].buf_len = (u16)sg_len; | |
1469 | bd[bd_count].flags = 0; | |
1470 | } | |
1471 | bd_count += sg_frags; | |
1472 | byte_count += sg_len; | |
1473 | } | |
1474 | if (byte_count != scsi_bufflen(sc)) | |
1475 | printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " | |
1476 | "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), | |
1477 | io_req->xid); | |
1478 | return bd_count; | |
1479 | } | |
1480 | ||
1481 | static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) | |
1482 | { | |
1483 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1484 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1485 | int bd_count; | |
1486 | ||
1487 | if (scsi_sg_count(sc)) | |
1488 | bd_count = bnx2fc_map_sg(io_req); | |
1489 | else { | |
1490 | bd_count = 0; | |
1491 | bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; | |
1492 | bd[0].buf_len = bd[0].flags = 0; | |
1493 | } | |
1494 | io_req->bd_tbl->bd_valid = bd_count; | |
1495 | } | |
1496 | ||
1497 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) | |
1498 | { | |
1499 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1500 | ||
1501 | if (io_req->bd_tbl->bd_valid && sc) { | |
1502 | scsi_dma_unmap(sc); | |
1503 | io_req->bd_tbl->bd_valid = 0; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, | |
1508 | struct fcp_cmnd *fcp_cmnd) | |
1509 | { | |
1510 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1511 | char tag[2]; | |
1512 | ||
1513 | memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); | |
1514 | ||
1515 | int_to_scsilun(sc_cmd->device->lun, | |
1516 | (struct scsi_lun *) fcp_cmnd->fc_lun); | |
1517 | ||
1518 | ||
1519 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); | |
1520 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); | |
1521 | ||
1522 | fcp_cmnd->fc_cmdref = 0; | |
1523 | fcp_cmnd->fc_pri_ta = 0; | |
1524 | fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; | |
1525 | fcp_cmnd->fc_flags = io_req->io_req_flags; | |
1526 | ||
1527 | if (scsi_populate_tag_msg(sc_cmd, tag)) { | |
1528 | switch (tag[0]) { | |
1529 | case HEAD_OF_QUEUE_TAG: | |
1530 | fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ; | |
1531 | break; | |
1532 | case ORDERED_QUEUE_TAG: | |
1533 | fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED; | |
1534 | break; | |
1535 | default: | |
1536 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; | |
1537 | break; | |
1538 | } | |
1539 | } else { | |
1540 | fcp_cmnd->fc_pri_ta = 0; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, | |
1545 | struct fcoe_fcp_rsp_payload *fcp_rsp, | |
1546 | u8 num_rq) | |
1547 | { | |
1548 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1549 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1550 | u8 rsp_flags = fcp_rsp->fcp_flags.flags; | |
1551 | u32 rq_buff_len = 0; | |
1552 | int i; | |
1553 | unsigned char *rq_data; | |
1554 | unsigned char *dummy; | |
1555 | int fcp_sns_len = 0; | |
1556 | int fcp_rsp_len = 0; | |
1557 | ||
1558 | io_req->fcp_status = FC_GOOD; | |
1559 | io_req->fcp_resid = fcp_rsp->fcp_resid; | |
1560 | ||
1561 | io_req->scsi_comp_flags = rsp_flags; | |
1562 | CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = | |
1563 | fcp_rsp->scsi_status_code; | |
1564 | ||
1565 | /* Fetch fcp_rsp_info and fcp_sns_info if available */ | |
1566 | if (num_rq) { | |
1567 | ||
1568 | /* | |
1569 | * We do not anticipate num_rq >1, as the linux defined | |
1570 | * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO | |
1571 | * 256 bytes of single rq buffer is good enough to hold this. | |
1572 | */ | |
1573 | ||
1574 | if (rsp_flags & | |
1575 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { | |
1576 | fcp_rsp_len = rq_buff_len | |
1577 | = fcp_rsp->fcp_rsp_len; | |
1578 | } | |
1579 | ||
1580 | if (rsp_flags & | |
1581 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { | |
1582 | fcp_sns_len = fcp_rsp->fcp_sns_len; | |
1583 | rq_buff_len += fcp_rsp->fcp_sns_len; | |
1584 | } | |
1585 | ||
1586 | io_req->fcp_rsp_len = fcp_rsp_len; | |
1587 | io_req->fcp_sns_len = fcp_sns_len; | |
1588 | ||
1589 | if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { | |
1590 | /* Invalid sense sense length. */ | |
1591 | printk(KERN_ALERT PFX "invalid sns length %d\n", | |
1592 | rq_buff_len); | |
1593 | /* reset rq_buff_len */ | |
1594 | rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; | |
1595 | } | |
1596 | ||
1597 | rq_data = bnx2fc_get_next_rqe(tgt, 1); | |
1598 | ||
1599 | if (num_rq > 1) { | |
1600 | /* We do not need extra sense data */ | |
1601 | for (i = 1; i < num_rq; i++) | |
1602 | dummy = bnx2fc_get_next_rqe(tgt, 1); | |
1603 | } | |
1604 | ||
1605 | /* fetch fcp_rsp_code */ | |
1606 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { | |
1607 | /* Only for task management function */ | |
1608 | io_req->fcp_rsp_code = rq_data[3]; | |
1609 | printk(KERN_ERR PFX "fcp_rsp_code = %d\n", | |
1610 | io_req->fcp_rsp_code); | |
1611 | } | |
1612 | ||
1613 | /* fetch sense data */ | |
1614 | rq_data += fcp_rsp_len; | |
1615 | ||
1616 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { | |
1617 | printk(KERN_ERR PFX "Truncating sense buffer\n"); | |
1618 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; | |
1619 | } | |
1620 | ||
1621 | memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer)); | |
1622 | if (fcp_sns_len) | |
1623 | memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); | |
1624 | ||
1625 | /* return RQ entries */ | |
1626 | for (i = 0; i < num_rq; i++) | |
1627 | bnx2fc_return_rqe(tgt, 1); | |
1628 | } | |
1629 | } | |
1630 | ||
1631 | /** | |
1632 | * bnx2fc_queuecommand - Queuecommand function of the scsi template | |
1633 | * | |
1634 | * @host: The Scsi_Host the command was issued to | |
1635 | * @sc_cmd: struct scsi_cmnd to be executed | |
1636 | * | |
1637 | * This is the IO strategy routine, called by SCSI-ML | |
1638 | **/ | |
1639 | int bnx2fc_queuecommand(struct Scsi_Host *host, | |
1640 | struct scsi_cmnd *sc_cmd) | |
1641 | { | |
1642 | struct fc_lport *lport = shost_priv(host); | |
1643 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1644 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1645 | struct bnx2fc_rport *tgt; | |
1646 | struct bnx2fc_cmd *io_req; | |
1647 | int rc = 0; | |
1648 | int rval; | |
1649 | ||
1650 | rval = fc_remote_port_chkready(rport); | |
1651 | if (rval) { | |
1652 | sc_cmd->result = rval; | |
1653 | sc_cmd->scsi_done(sc_cmd); | |
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
1658 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1659 | goto exit_qcmd; | |
1660 | } | |
1661 | ||
1662 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
1663 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1664 | ||
1665 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
1666 | /* | |
1667 | * Session is not offloaded yet. Let SCSI-ml retry | |
1668 | * the command. | |
1669 | */ | |
1670 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
1671 | goto exit_qcmd; | |
1672 | } | |
1673 | ||
1674 | io_req = bnx2fc_cmd_alloc(tgt); | |
1675 | if (!io_req) { | |
1676 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1677 | goto exit_qcmd; | |
1678 | } | |
1679 | io_req->sc_cmd = sc_cmd; | |
1680 | ||
1681 | if (bnx2fc_post_io_req(tgt, io_req)) { | |
1682 | printk(KERN_ERR PFX "Unable to post io_req\n"); | |
1683 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1684 | goto exit_qcmd; | |
1685 | } | |
1686 | exit_qcmd: | |
1687 | return rc; | |
1688 | } | |
1689 | ||
1690 | void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, | |
1691 | struct fcoe_task_ctx_entry *task, | |
1692 | u8 num_rq) | |
1693 | { | |
1694 | struct fcoe_fcp_rsp_payload *fcp_rsp; | |
1695 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1696 | struct scsi_cmnd *sc_cmd; | |
1697 | struct Scsi_Host *host; | |
1698 | ||
1699 | ||
1700 | /* scsi_cmd_cmpl is called with tgt lock held */ | |
1701 | ||
1702 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { | |
1703 | /* we will not receive ABTS response for this IO */ | |
1704 | BNX2FC_IO_DBG(io_req, "Timer context finished processing " | |
1705 | "this scsi cmd\n"); | |
1706 | } | |
1707 | ||
1708 | /* Cancel the timeout_work, as we received IO completion */ | |
1709 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1710 | kref_put(&io_req->refcount, | |
1711 | bnx2fc_cmd_release); /* drop timer hold */ | |
1712 | ||
1713 | sc_cmd = io_req->sc_cmd; | |
1714 | if (sc_cmd == NULL) { | |
1715 | printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); | |
1716 | return; | |
1717 | } | |
1718 | ||
1719 | /* Fetch fcp_rsp from task context and perform cmd completion */ | |
1720 | fcp_rsp = (struct fcoe_fcp_rsp_payload *) | |
1721 | &(task->cmn.general.rsp_info.fcp_rsp.payload); | |
1722 | ||
1723 | /* parse fcp_rsp and obtain sense data from RQ if available */ | |
1724 | bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); | |
1725 | ||
1726 | host = sc_cmd->device->host; | |
1727 | if (!sc_cmd->SCp.ptr) { | |
1728 | printk(KERN_ERR PFX "SCp.ptr is NULL\n"); | |
1729 | return; | |
1730 | } | |
1731 | io_req->sc_cmd = NULL; | |
1732 | ||
1733 | if (io_req->on_active_queue) { | |
1734 | list_del_init(&io_req->link); | |
1735 | io_req->on_active_queue = 0; | |
1736 | /* Move IO req to retire queue */ | |
1737 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1738 | } else { | |
1739 | /* This should not happen, but could have been pulled | |
1740 | * by bnx2fc_flush_active_ios(), or during a race | |
1741 | * between command abort and (late) completion. | |
1742 | */ | |
1743 | BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); | |
1744 | if (io_req->wait_for_comp) | |
1745 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1746 | &io_req->req_flags)) | |
1747 | complete(&io_req->tm_done); | |
1748 | } | |
1749 | ||
1750 | bnx2fc_unmap_sg_list(io_req); | |
1751 | ||
1752 | switch (io_req->fcp_status) { | |
1753 | case FC_GOOD: | |
1754 | if (io_req->cdb_status == 0) { | |
1755 | /* Good IO completion */ | |
1756 | sc_cmd->result = DID_OK << 16; | |
1757 | } else { | |
1758 | /* Transport status is good, SCSI status not good */ | |
1759 | BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" | |
1760 | " fcp_resid = 0x%x\n", | |
1761 | io_req->cdb_status, io_req->fcp_resid); | |
1762 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1763 | } | |
1764 | if (io_req->fcp_resid) | |
1765 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1766 | break; | |
1767 | default: | |
1768 | printk(KERN_ALERT PFX "scsi_cmd_compl: fcp_status = %d\n", | |
1769 | io_req->fcp_status); | |
1770 | break; | |
1771 | } | |
1772 | sc_cmd->SCp.ptr = NULL; | |
1773 | sc_cmd->scsi_done(sc_cmd); | |
1774 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1775 | } | |
1776 | ||
1777 | static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, | |
1778 | struct bnx2fc_cmd *io_req) | |
1779 | { | |
1780 | struct fcoe_task_ctx_entry *task; | |
1781 | struct fcoe_task_ctx_entry *task_page; | |
1782 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1783 | struct fcoe_port *port = tgt->port; | |
1784 | struct bnx2fc_hba *hba = port->priv; | |
1785 | struct fc_lport *lport = port->lport; | |
1786 | struct fcoe_dev_stats *stats; | |
1787 | int task_idx, index; | |
1788 | u16 xid; | |
1789 | ||
1790 | /* Initialize rest of io_req fields */ | |
1791 | io_req->cmd_type = BNX2FC_SCSI_CMD; | |
1792 | io_req->port = port; | |
1793 | io_req->tgt = tgt; | |
1794 | io_req->data_xfer_len = scsi_bufflen(sc_cmd); | |
1795 | sc_cmd->SCp.ptr = (char *)io_req; | |
1796 | ||
1797 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); | |
1798 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
1799 | io_req->io_req_flags = BNX2FC_READ; | |
1800 | stats->InputRequests++; | |
1801 | stats->InputBytes += io_req->data_xfer_len; | |
1802 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1803 | io_req->io_req_flags = BNX2FC_WRITE; | |
1804 | stats->OutputRequests++; | |
1805 | stats->OutputBytes += io_req->data_xfer_len; | |
1806 | } else { | |
1807 | io_req->io_req_flags = 0; | |
1808 | stats->ControlRequests++; | |
1809 | } | |
1810 | put_cpu(); | |
1811 | ||
1812 | xid = io_req->xid; | |
1813 | ||
1814 | /* Build buffer descriptor list for firmware from sg list */ | |
1815 | bnx2fc_build_bd_list_from_sg(io_req); | |
1816 | ||
1817 | task_idx = xid / BNX2FC_TASKS_PER_PAGE; | |
1818 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
1819 | ||
1820 | /* Initialize task context for this IO request */ | |
1821 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
1822 | task = &(task_page[index]); | |
1823 | bnx2fc_init_task(io_req, task); | |
1824 | ||
1825 | spin_lock_bh(&tgt->tgt_lock); | |
1826 | ||
1827 | if (tgt->flush_in_prog) { | |
1828 | printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); | |
1829 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1830 | spin_unlock_bh(&tgt->tgt_lock); | |
1831 | return -EAGAIN; | |
1832 | } | |
1833 | ||
1834 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
1835 | printk(KERN_ERR PFX "Session not ready...post_io\n"); | |
1836 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1837 | spin_unlock_bh(&tgt->tgt_lock); | |
1838 | return -EAGAIN; | |
1839 | } | |
1840 | ||
1841 | /* Time IO req */ | |
1842 | bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); | |
1843 | /* Obtain free SQ entry */ | |
1844 | bnx2fc_add_2_sq(tgt, xid); | |
1845 | ||
1846 | /* Enqueue the io_req to active_cmd_queue */ | |
1847 | ||
1848 | io_req->on_active_queue = 1; | |
1849 | /* move io_req from pending_queue to active_queue */ | |
1850 | list_add_tail(&io_req->link, &tgt->active_cmd_queue); | |
1851 | ||
1852 | /* Ring doorbell */ | |
1853 | bnx2fc_ring_doorbell(tgt); | |
1854 | spin_unlock_bh(&tgt->tgt_lock); | |
1855 | return 0; | |
1856 | } |