Commit | Line | Data |
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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); | |
853e2bd2 BG |
21 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); |
22 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); | |
23 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, | |
24 | struct fcoe_fcp_rsp_payload *fcp_rsp, | |
25 | u8 num_rq); | |
26 | ||
27 | void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, | |
28 | unsigned int timer_msec) | |
29 | { | |
aea71a02 | 30 | struct bnx2fc_interface *interface = io_req->port->priv; |
853e2bd2 | 31 | |
aea71a02 BPG |
32 | if (queue_delayed_work(interface->timer_work_queue, |
33 | &io_req->timeout_work, | |
34 | msecs_to_jiffies(timer_msec))) | |
853e2bd2 BG |
35 | kref_get(&io_req->refcount); |
36 | } | |
37 | ||
38 | static void bnx2fc_cmd_timeout(struct work_struct *work) | |
39 | { | |
40 | struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, | |
41 | timeout_work.work); | |
42 | struct fc_lport *lport; | |
43 | struct fc_rport_priv *rdata; | |
44 | u8 cmd_type = io_req->cmd_type; | |
45 | struct bnx2fc_rport *tgt = io_req->tgt; | |
46 | int logo_issued; | |
47 | int rc; | |
48 | ||
49 | BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," | |
50 | "req_flags = %lx\n", cmd_type, io_req->req_flags); | |
51 | ||
52 | spin_lock_bh(&tgt->tgt_lock); | |
53 | if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { | |
54 | clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
55 | /* | |
56 | * ideally we should hold the io_req until RRQ complets, | |
57 | * and release io_req from timeout hold. | |
58 | */ | |
59 | spin_unlock_bh(&tgt->tgt_lock); | |
60 | bnx2fc_send_rrq(io_req); | |
61 | return; | |
62 | } | |
63 | if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { | |
64 | BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); | |
65 | goto done; | |
66 | } | |
67 | ||
68 | switch (cmd_type) { | |
69 | case BNX2FC_SCSI_CMD: | |
70 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
71 | &io_req->req_flags)) { | |
72 | /* Handle eh_abort timeout */ | |
73 | BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); | |
74 | complete(&io_req->tm_done); | |
75 | } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
76 | &io_req->req_flags)) { | |
77 | /* Handle internally generated ABTS timeout */ | |
78 | BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", | |
79 | io_req->refcount.refcount.counter); | |
80 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
81 | &io_req->req_flags))) { | |
82 | ||
83 | lport = io_req->port->lport; | |
84 | rdata = io_req->tgt->rdata; | |
85 | logo_issued = test_and_set_bit( | |
86 | BNX2FC_FLAG_EXPL_LOGO, | |
87 | &tgt->flags); | |
88 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
89 | spin_unlock_bh(&tgt->tgt_lock); | |
90 | ||
91 | /* Explicitly logo the target */ | |
92 | if (!logo_issued) { | |
93 | BNX2FC_IO_DBG(io_req, "Explicit " | |
94 | "logo - tgt flags = 0x%lx\n", | |
95 | tgt->flags); | |
96 | ||
97 | mutex_lock(&lport->disc.disc_mutex); | |
98 | lport->tt.rport_logoff(rdata); | |
99 | mutex_unlock(&lport->disc.disc_mutex); | |
100 | } | |
101 | return; | |
102 | } | |
103 | } else { | |
104 | /* Hanlde IO timeout */ | |
105 | BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); | |
106 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, | |
107 | &io_req->req_flags)) { | |
108 | BNX2FC_IO_DBG(io_req, "IO completed before " | |
109 | " timer expiry\n"); | |
110 | goto done; | |
111 | } | |
112 | ||
113 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
114 | &io_req->req_flags)) { | |
115 | rc = bnx2fc_initiate_abts(io_req); | |
116 | if (rc == SUCCESS) | |
117 | goto done; | |
118 | /* | |
119 | * Explicitly logo the target if | |
120 | * abts initiation fails | |
121 | */ | |
122 | lport = io_req->port->lport; | |
123 | rdata = io_req->tgt->rdata; | |
124 | logo_issued = test_and_set_bit( | |
125 | BNX2FC_FLAG_EXPL_LOGO, | |
126 | &tgt->flags); | |
127 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
128 | spin_unlock_bh(&tgt->tgt_lock); | |
129 | ||
130 | if (!logo_issued) { | |
131 | BNX2FC_IO_DBG(io_req, "Explicit " | |
132 | "logo - tgt flags = 0x%lx\n", | |
133 | tgt->flags); | |
134 | ||
135 | ||
136 | mutex_lock(&lport->disc.disc_mutex); | |
137 | lport->tt.rport_logoff(rdata); | |
138 | mutex_unlock(&lport->disc.disc_mutex); | |
139 | } | |
140 | return; | |
141 | } else { | |
142 | BNX2FC_IO_DBG(io_req, "IO already in " | |
143 | "ABTS processing\n"); | |
144 | } | |
145 | } | |
146 | break; | |
147 | case BNX2FC_ELS: | |
148 | ||
149 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { | |
150 | BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); | |
151 | ||
152 | if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
153 | &io_req->req_flags)) { | |
154 | lport = io_req->port->lport; | |
155 | rdata = io_req->tgt->rdata; | |
156 | logo_issued = test_and_set_bit( | |
157 | BNX2FC_FLAG_EXPL_LOGO, | |
158 | &tgt->flags); | |
159 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
160 | spin_unlock_bh(&tgt->tgt_lock); | |
161 | ||
162 | /* Explicitly logo the target */ | |
163 | if (!logo_issued) { | |
164 | BNX2FC_IO_DBG(io_req, "Explicitly logo" | |
165 | "(els)\n"); | |
166 | mutex_lock(&lport->disc.disc_mutex); | |
167 | lport->tt.rport_logoff(rdata); | |
168 | mutex_unlock(&lport->disc.disc_mutex); | |
169 | } | |
170 | return; | |
171 | } | |
172 | } else { | |
173 | /* | |
174 | * Handle ELS timeout. | |
175 | * tgt_lock is used to sync compl path and timeout | |
176 | * path. If els compl path is processing this IO, we | |
177 | * have nothing to do here, just release the timer hold | |
178 | */ | |
179 | BNX2FC_IO_DBG(io_req, "ELS timed out\n"); | |
180 | if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, | |
181 | &io_req->req_flags)) | |
182 | goto done; | |
183 | ||
184 | /* Indicate the cb_func that this ELS is timed out */ | |
185 | set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); | |
186 | ||
187 | if ((io_req->cb_func) && (io_req->cb_arg)) { | |
188 | io_req->cb_func(io_req->cb_arg); | |
189 | io_req->cb_arg = NULL; | |
190 | } | |
191 | } | |
192 | break; | |
193 | default: | |
194 | printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", | |
195 | cmd_type); | |
196 | break; | |
197 | } | |
198 | ||
199 | done: | |
200 | /* release the cmd that was held when timer was set */ | |
201 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
202 | spin_unlock_bh(&tgt->tgt_lock); | |
203 | } | |
204 | ||
205 | static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) | |
206 | { | |
207 | /* Called with host lock held */ | |
208 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
209 | ||
210 | /* | |
211 | * active_cmd_queue may have other command types as well, | |
212 | * and during flush operation, we want to error back only | |
213 | * scsi commands. | |
214 | */ | |
215 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) | |
216 | return; | |
217 | ||
218 | BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); | |
74446954 BPG |
219 | if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { |
220 | /* Do not call scsi done for this IO */ | |
221 | return; | |
222 | } | |
223 | ||
853e2bd2 BG |
224 | bnx2fc_unmap_sg_list(io_req); |
225 | io_req->sc_cmd = NULL; | |
226 | if (!sc_cmd) { | |
227 | printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " | |
228 | "IO(0x%x) already cleaned up\n", | |
229 | io_req->xid); | |
230 | return; | |
231 | } | |
232 | sc_cmd->result = err_code << 16; | |
233 | ||
234 | BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", | |
235 | sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, | |
236 | sc_cmd->allowed); | |
237 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); | |
238 | sc_cmd->SCp.ptr = NULL; | |
239 | sc_cmd->scsi_done(sc_cmd); | |
240 | } | |
241 | ||
242 | struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba, | |
243 | u16 min_xid, u16 max_xid) | |
244 | { | |
245 | struct bnx2fc_cmd_mgr *cmgr; | |
246 | struct io_bdt *bdt_info; | |
247 | struct bnx2fc_cmd *io_req; | |
248 | size_t len; | |
249 | u32 mem_size; | |
250 | u16 xid; | |
251 | int i; | |
0ea5c275 | 252 | int num_ios, num_pri_ios; |
853e2bd2 | 253 | size_t bd_tbl_sz; |
0ea5c275 | 254 | int arr_sz = num_possible_cpus() + 1; |
853e2bd2 BG |
255 | |
256 | if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { | |
257 | printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ | |
258 | and max_xid 0x%x\n", min_xid, max_xid); | |
259 | return NULL; | |
260 | } | |
261 | BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); | |
262 | ||
263 | num_ios = max_xid - min_xid + 1; | |
264 | len = (num_ios * (sizeof(struct bnx2fc_cmd *))); | |
265 | len += sizeof(struct bnx2fc_cmd_mgr); | |
266 | ||
267 | cmgr = kzalloc(len, GFP_KERNEL); | |
268 | if (!cmgr) { | |
269 | printk(KERN_ERR PFX "failed to alloc cmgr\n"); | |
270 | return NULL; | |
271 | } | |
272 | ||
273 | cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * | |
0ea5c275 | 274 | arr_sz, GFP_KERNEL); |
853e2bd2 BG |
275 | if (!cmgr->free_list) { |
276 | printk(KERN_ERR PFX "failed to alloc free_list\n"); | |
277 | goto mem_err; | |
278 | } | |
279 | ||
280 | cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * | |
0ea5c275 | 281 | arr_sz, GFP_KERNEL); |
853e2bd2 BG |
282 | if (!cmgr->free_list_lock) { |
283 | printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); | |
284 | goto mem_err; | |
285 | } | |
286 | ||
287 | cmgr->hba = hba; | |
288 | cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); | |
289 | ||
0ea5c275 | 290 | for (i = 0; i < arr_sz; i++) { |
853e2bd2 BG |
291 | INIT_LIST_HEAD(&cmgr->free_list[i]); |
292 | spin_lock_init(&cmgr->free_list_lock[i]); | |
293 | } | |
294 | ||
0ea5c275 BG |
295 | /* |
296 | * Pre-allocated pool of bnx2fc_cmds. | |
297 | * Last entry in the free list array is the free list | |
298 | * of slow path requests. | |
299 | */ | |
853e2bd2 | 300 | xid = BNX2FC_MIN_XID; |
0ea5c275 | 301 | num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS; |
853e2bd2 BG |
302 | for (i = 0; i < num_ios; i++) { |
303 | io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); | |
304 | ||
305 | if (!io_req) { | |
306 | printk(KERN_ERR PFX "failed to alloc io_req\n"); | |
307 | goto mem_err; | |
308 | } | |
309 | ||
310 | INIT_LIST_HEAD(&io_req->link); | |
311 | INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); | |
312 | ||
313 | io_req->xid = xid++; | |
0ea5c275 BG |
314 | if (i < num_pri_ios) |
315 | list_add_tail(&io_req->link, | |
316 | &cmgr->free_list[io_req->xid % | |
317 | num_possible_cpus()]); | |
318 | else | |
319 | list_add_tail(&io_req->link, | |
320 | &cmgr->free_list[num_possible_cpus()]); | |
853e2bd2 BG |
321 | io_req++; |
322 | } | |
323 | ||
324 | /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ | |
325 | mem_size = num_ios * sizeof(struct io_bdt *); | |
326 | cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); | |
327 | if (!cmgr->io_bdt_pool) { | |
328 | printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); | |
329 | goto mem_err; | |
330 | } | |
331 | ||
332 | mem_size = sizeof(struct io_bdt); | |
333 | for (i = 0; i < num_ios; i++) { | |
334 | cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); | |
335 | if (!cmgr->io_bdt_pool[i]) { | |
336 | printk(KERN_ERR PFX "failed to alloc " | |
337 | "io_bdt_pool[%d]\n", i); | |
338 | goto mem_err; | |
339 | } | |
340 | } | |
341 | ||
342 | /* Allocate an map fcoe_bdt_ctx structures */ | |
343 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
344 | for (i = 0; i < num_ios; i++) { | |
345 | bdt_info = cmgr->io_bdt_pool[i]; | |
346 | bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, | |
347 | bd_tbl_sz, | |
348 | &bdt_info->bd_tbl_dma, | |
349 | GFP_KERNEL); | |
350 | if (!bdt_info->bd_tbl) { | |
351 | printk(KERN_ERR PFX "failed to alloc " | |
352 | "bdt_tbl[%d]\n", i); | |
353 | goto mem_err; | |
354 | } | |
355 | } | |
356 | ||
357 | return cmgr; | |
358 | ||
359 | mem_err: | |
360 | bnx2fc_cmd_mgr_free(cmgr); | |
361 | return NULL; | |
362 | } | |
363 | ||
364 | void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) | |
365 | { | |
366 | struct io_bdt *bdt_info; | |
367 | struct bnx2fc_hba *hba = cmgr->hba; | |
368 | size_t bd_tbl_sz; | |
369 | u16 min_xid = BNX2FC_MIN_XID; | |
370 | u16 max_xid = BNX2FC_MAX_XID; | |
371 | int num_ios; | |
372 | int i; | |
373 | ||
374 | num_ios = max_xid - min_xid + 1; | |
375 | ||
376 | /* Free fcoe_bdt_ctx structures */ | |
377 | if (!cmgr->io_bdt_pool) | |
378 | goto free_cmd_pool; | |
379 | ||
380 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
381 | for (i = 0; i < num_ios; i++) { | |
382 | bdt_info = cmgr->io_bdt_pool[i]; | |
383 | if (bdt_info->bd_tbl) { | |
384 | dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, | |
385 | bdt_info->bd_tbl, | |
386 | bdt_info->bd_tbl_dma); | |
387 | bdt_info->bd_tbl = NULL; | |
388 | } | |
389 | } | |
390 | ||
391 | /* Destroy io_bdt pool */ | |
392 | for (i = 0; i < num_ios; i++) { | |
393 | kfree(cmgr->io_bdt_pool[i]); | |
394 | cmgr->io_bdt_pool[i] = NULL; | |
395 | } | |
396 | ||
397 | kfree(cmgr->io_bdt_pool); | |
398 | cmgr->io_bdt_pool = NULL; | |
399 | ||
400 | free_cmd_pool: | |
401 | kfree(cmgr->free_list_lock); | |
402 | ||
403 | /* Destroy cmd pool */ | |
404 | if (!cmgr->free_list) | |
405 | goto free_cmgr; | |
406 | ||
0ea5c275 | 407 | for (i = 0; i < num_possible_cpus() + 1; i++) { |
853e2bd2 BG |
408 | struct list_head *list; |
409 | struct list_head *tmp; | |
410 | ||
411 | list_for_each_safe(list, tmp, &cmgr->free_list[i]) { | |
412 | struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list; | |
413 | list_del(&io_req->link); | |
414 | kfree(io_req); | |
415 | } | |
416 | } | |
417 | kfree(cmgr->free_list); | |
418 | free_cmgr: | |
419 | /* Free command manager itself */ | |
420 | kfree(cmgr); | |
421 | } | |
422 | ||
423 | struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) | |
424 | { | |
425 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
426 | struct bnx2fc_interface *interface = port->priv; |
427 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; | |
853e2bd2 BG |
428 | struct bnx2fc_cmd *io_req; |
429 | struct list_head *listp; | |
430 | struct io_bdt *bd_tbl; | |
0ea5c275 | 431 | int index = RESERVE_FREE_LIST_INDEX; |
619c5cb6 | 432 | u32 free_sqes; |
853e2bd2 BG |
433 | u32 max_sqes; |
434 | u16 xid; | |
435 | ||
436 | max_sqes = tgt->max_sqes; | |
437 | switch (type) { | |
438 | case BNX2FC_TASK_MGMT_CMD: | |
439 | max_sqes = BNX2FC_TM_MAX_SQES; | |
440 | break; | |
441 | case BNX2FC_ELS: | |
442 | max_sqes = BNX2FC_ELS_MAX_SQES; | |
443 | break; | |
444 | default: | |
445 | break; | |
446 | } | |
447 | ||
448 | /* | |
449 | * NOTE: Free list insertions and deletions are protected with | |
450 | * cmgr lock | |
451 | */ | |
0ea5c275 | 452 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
619c5cb6 | 453 | free_sqes = atomic_read(&tgt->free_sqes); |
0ea5c275 | 454 | if ((list_empty(&(cmd_mgr->free_list[index]))) || |
619c5cb6 VZ |
455 | (tgt->num_active_ios.counter >= max_sqes) || |
456 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { | |
853e2bd2 BG |
457 | BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " |
458 | "ios(%d):sqes(%d)\n", | |
459 | tgt->num_active_ios.counter, tgt->max_sqes); | |
0ea5c275 | 460 | if (list_empty(&(cmd_mgr->free_list[index]))) |
853e2bd2 | 461 | printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); |
0ea5c275 | 462 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
463 | return NULL; |
464 | } | |
465 | ||
466 | listp = (struct list_head *) | |
0ea5c275 | 467 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
468 | list_del_init(listp); |
469 | io_req = (struct bnx2fc_cmd *) listp; | |
470 | xid = io_req->xid; | |
471 | cmd_mgr->cmds[xid] = io_req; | |
472 | atomic_inc(&tgt->num_active_ios); | |
619c5cb6 | 473 | atomic_dec(&tgt->free_sqes); |
0ea5c275 | 474 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
475 | |
476 | INIT_LIST_HEAD(&io_req->link); | |
477 | ||
478 | io_req->port = port; | |
479 | io_req->cmd_mgr = cmd_mgr; | |
480 | io_req->req_flags = 0; | |
481 | io_req->cmd_type = type; | |
482 | ||
483 | /* Bind io_bdt for this io_req */ | |
484 | /* Have a static link between io_req and io_bdt_pool */ | |
485 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
486 | bd_tbl->io_req = io_req; | |
487 | ||
488 | /* Hold the io_req against deletion */ | |
489 | kref_init(&io_req->refcount); | |
490 | return io_req; | |
491 | } | |
aea71a02 BPG |
492 | |
493 | struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) | |
853e2bd2 BG |
494 | { |
495 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
496 | struct bnx2fc_interface *interface = port->priv; |
497 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; | |
853e2bd2 BG |
498 | struct bnx2fc_cmd *io_req; |
499 | struct list_head *listp; | |
500 | struct io_bdt *bd_tbl; | |
619c5cb6 | 501 | u32 free_sqes; |
853e2bd2 BG |
502 | u32 max_sqes; |
503 | u16 xid; | |
0ea5c275 | 504 | int index = get_cpu(); |
853e2bd2 BG |
505 | |
506 | max_sqes = BNX2FC_SCSI_MAX_SQES; | |
507 | /* | |
508 | * NOTE: Free list insertions and deletions are protected with | |
509 | * cmgr lock | |
510 | */ | |
0ea5c275 | 511 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
619c5cb6 | 512 | free_sqes = atomic_read(&tgt->free_sqes); |
0ea5c275 | 513 | if ((list_empty(&cmd_mgr->free_list[index])) || |
619c5cb6 VZ |
514 | (tgt->num_active_ios.counter >= max_sqes) || |
515 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { | |
0ea5c275 BG |
516 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
517 | put_cpu(); | |
853e2bd2 BG |
518 | return NULL; |
519 | } | |
520 | ||
521 | listp = (struct list_head *) | |
0ea5c275 | 522 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
523 | list_del_init(listp); |
524 | io_req = (struct bnx2fc_cmd *) listp; | |
525 | xid = io_req->xid; | |
526 | cmd_mgr->cmds[xid] = io_req; | |
527 | atomic_inc(&tgt->num_active_ios); | |
619c5cb6 | 528 | atomic_dec(&tgt->free_sqes); |
0ea5c275 BG |
529 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
530 | put_cpu(); | |
853e2bd2 BG |
531 | |
532 | INIT_LIST_HEAD(&io_req->link); | |
533 | ||
534 | io_req->port = port; | |
535 | io_req->cmd_mgr = cmd_mgr; | |
536 | io_req->req_flags = 0; | |
537 | ||
538 | /* Bind io_bdt for this io_req */ | |
539 | /* Have a static link between io_req and io_bdt_pool */ | |
540 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
541 | bd_tbl->io_req = io_req; | |
542 | ||
543 | /* Hold the io_req against deletion */ | |
544 | kref_init(&io_req->refcount); | |
545 | return io_req; | |
546 | } | |
547 | ||
548 | void bnx2fc_cmd_release(struct kref *ref) | |
549 | { | |
550 | struct bnx2fc_cmd *io_req = container_of(ref, | |
551 | struct bnx2fc_cmd, refcount); | |
552 | struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; | |
0ea5c275 BG |
553 | int index; |
554 | ||
555 | if (io_req->cmd_type == BNX2FC_SCSI_CMD) | |
556 | index = io_req->xid % num_possible_cpus(); | |
557 | else | |
558 | index = RESERVE_FREE_LIST_INDEX; | |
853e2bd2 | 559 | |
0ea5c275 BG |
560 | |
561 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); | |
853e2bd2 BG |
562 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
563 | bnx2fc_free_mp_resc(io_req); | |
564 | cmd_mgr->cmds[io_req->xid] = NULL; | |
565 | /* Delete IO from retire queue */ | |
566 | list_del_init(&io_req->link); | |
567 | /* Add it to the free list */ | |
568 | list_add(&io_req->link, | |
0ea5c275 | 569 | &cmd_mgr->free_list[index]); |
853e2bd2 | 570 | atomic_dec(&io_req->tgt->num_active_ios); |
0ea5c275 BG |
571 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
572 | ||
853e2bd2 BG |
573 | } |
574 | ||
575 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) | |
576 | { | |
577 | struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); | |
aea71a02 BPG |
578 | struct bnx2fc_interface *interface = io_req->port->priv; |
579 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
580 | size_t sz = sizeof(struct fcoe_bd_ctx); |
581 | ||
582 | /* clear tm flags */ | |
583 | mp_req->tm_flags = 0; | |
584 | if (mp_req->mp_req_bd) { | |
585 | dma_free_coherent(&hba->pcidev->dev, sz, | |
586 | mp_req->mp_req_bd, | |
587 | mp_req->mp_req_bd_dma); | |
588 | mp_req->mp_req_bd = NULL; | |
589 | } | |
590 | if (mp_req->mp_resp_bd) { | |
591 | dma_free_coherent(&hba->pcidev->dev, sz, | |
592 | mp_req->mp_resp_bd, | |
593 | mp_req->mp_resp_bd_dma); | |
594 | mp_req->mp_resp_bd = NULL; | |
595 | } | |
596 | if (mp_req->req_buf) { | |
597 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
598 | mp_req->req_buf, | |
599 | mp_req->req_buf_dma); | |
600 | mp_req->req_buf = NULL; | |
601 | } | |
602 | if (mp_req->resp_buf) { | |
603 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
604 | mp_req->resp_buf, | |
605 | mp_req->resp_buf_dma); | |
606 | mp_req->resp_buf = NULL; | |
607 | } | |
608 | } | |
609 | ||
610 | int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) | |
611 | { | |
612 | struct bnx2fc_mp_req *mp_req; | |
613 | struct fcoe_bd_ctx *mp_req_bd; | |
614 | struct fcoe_bd_ctx *mp_resp_bd; | |
aea71a02 BPG |
615 | struct bnx2fc_interface *interface = io_req->port->priv; |
616 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
617 | dma_addr_t addr; |
618 | size_t sz; | |
619 | ||
620 | mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
621 | memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); | |
622 | ||
623 | mp_req->req_len = sizeof(struct fcp_cmnd); | |
624 | io_req->data_xfer_len = mp_req->req_len; | |
625 | mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
626 | &mp_req->req_buf_dma, | |
627 | GFP_ATOMIC); | |
628 | if (!mp_req->req_buf) { | |
629 | printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); | |
630 | bnx2fc_free_mp_resc(io_req); | |
631 | return FAILED; | |
632 | } | |
633 | ||
634 | mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
635 | &mp_req->resp_buf_dma, | |
636 | GFP_ATOMIC); | |
637 | if (!mp_req->resp_buf) { | |
638 | printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); | |
639 | bnx2fc_free_mp_resc(io_req); | |
640 | return FAILED; | |
641 | } | |
642 | memset(mp_req->req_buf, 0, PAGE_SIZE); | |
643 | memset(mp_req->resp_buf, 0, PAGE_SIZE); | |
644 | ||
645 | /* Allocate and map mp_req_bd and mp_resp_bd */ | |
646 | sz = sizeof(struct fcoe_bd_ctx); | |
647 | mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
648 | &mp_req->mp_req_bd_dma, | |
649 | GFP_ATOMIC); | |
650 | if (!mp_req->mp_req_bd) { | |
651 | printk(KERN_ERR PFX "unable to alloc MP req bd\n"); | |
652 | bnx2fc_free_mp_resc(io_req); | |
653 | return FAILED; | |
654 | } | |
655 | mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
656 | &mp_req->mp_resp_bd_dma, | |
657 | GFP_ATOMIC); | |
658 | if (!mp_req->mp_req_bd) { | |
659 | printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); | |
660 | bnx2fc_free_mp_resc(io_req); | |
661 | return FAILED; | |
662 | } | |
663 | /* Fill bd table */ | |
664 | addr = mp_req->req_buf_dma; | |
665 | mp_req_bd = mp_req->mp_req_bd; | |
666 | mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
667 | mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
668 | mp_req_bd->buf_len = PAGE_SIZE; | |
669 | mp_req_bd->flags = 0; | |
670 | ||
671 | /* | |
672 | * MP buffer is either a task mgmt command or an ELS. | |
673 | * So the assumption is that it consumes a single bd | |
674 | * entry in the bd table | |
675 | */ | |
676 | mp_resp_bd = mp_req->mp_resp_bd; | |
677 | addr = mp_req->resp_buf_dma; | |
678 | mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
679 | mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
680 | mp_resp_bd->buf_len = PAGE_SIZE; | |
681 | mp_resp_bd->flags = 0; | |
682 | ||
683 | return SUCCESS; | |
684 | } | |
685 | ||
686 | static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) | |
687 | { | |
688 | struct fc_lport *lport; | |
689 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
690 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
691 | struct fcoe_port *port; | |
aea71a02 | 692 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
693 | struct bnx2fc_rport *tgt; |
694 | struct bnx2fc_cmd *io_req; | |
695 | struct bnx2fc_mp_req *tm_req; | |
696 | struct fcoe_task_ctx_entry *task; | |
697 | struct fcoe_task_ctx_entry *task_page; | |
698 | struct Scsi_Host *host = sc_cmd->device->host; | |
699 | struct fc_frame_header *fc_hdr; | |
700 | struct fcp_cmnd *fcp_cmnd; | |
701 | int task_idx, index; | |
702 | int rc = SUCCESS; | |
703 | u16 xid; | |
704 | u32 sid, did; | |
705 | unsigned long start = jiffies; | |
706 | ||
707 | lport = shost_priv(host); | |
708 | port = lport_priv(lport); | |
aea71a02 | 709 | interface = port->priv; |
853e2bd2 BG |
710 | |
711 | if (rport == NULL) { | |
b2a554ff | 712 | printk(KERN_ERR PFX "device_reset: rport is NULL\n"); |
853e2bd2 BG |
713 | rc = FAILED; |
714 | goto tmf_err; | |
715 | } | |
716 | ||
717 | rc = fc_block_scsi_eh(sc_cmd); | |
718 | if (rc) | |
719 | return rc; | |
720 | ||
721 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
722 | printk(KERN_ERR PFX "device_reset: link is not ready\n"); | |
723 | rc = FAILED; | |
724 | goto tmf_err; | |
725 | } | |
726 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
727 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
728 | ||
729 | if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { | |
730 | printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); | |
731 | rc = FAILED; | |
732 | goto tmf_err; | |
733 | } | |
734 | retry_tmf: | |
735 | io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); | |
736 | if (!io_req) { | |
737 | if (time_after(jiffies, start + HZ)) { | |
738 | printk(KERN_ERR PFX "tmf: Failed TMF"); | |
739 | rc = FAILED; | |
740 | goto tmf_err; | |
741 | } | |
742 | msleep(20); | |
743 | goto retry_tmf; | |
744 | } | |
745 | /* Initialize rest of io_req fields */ | |
746 | io_req->sc_cmd = sc_cmd; | |
747 | io_req->port = port; | |
748 | io_req->tgt = tgt; | |
749 | ||
750 | tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
751 | ||
752 | rc = bnx2fc_init_mp_req(io_req); | |
753 | if (rc == FAILED) { | |
754 | printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); | |
bd4d5de8 | 755 | spin_lock_bh(&tgt->tgt_lock); |
853e2bd2 | 756 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
bd4d5de8 | 757 | spin_unlock_bh(&tgt->tgt_lock); |
853e2bd2 BG |
758 | goto tmf_err; |
759 | } | |
760 | ||
761 | /* Set TM flags */ | |
762 | io_req->io_req_flags = 0; | |
763 | tm_req->tm_flags = tm_flags; | |
764 | ||
765 | /* Fill FCP_CMND */ | |
766 | bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); | |
767 | fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; | |
768 | memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); | |
769 | fcp_cmnd->fc_dl = 0; | |
770 | ||
771 | /* Fill FC header */ | |
772 | fc_hdr = &(tm_req->req_fc_hdr); | |
773 | sid = tgt->sid; | |
774 | did = rport->port_id; | |
775 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, | |
776 | FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
777 | FC_FC_SEQ_INIT, 0); | |
778 | /* Obtain exchange id */ | |
779 | xid = io_req->xid; | |
780 | ||
781 | BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); | |
782 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
783 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
784 | ||
785 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
786 | task_page = (struct fcoe_task_ctx_entry *) |
787 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
788 | task = &(task_page[index]); |
789 | bnx2fc_init_mp_task(io_req, task); | |
790 | ||
791 | sc_cmd->SCp.ptr = (char *)io_req; | |
792 | ||
793 | /* Obtain free SQ entry */ | |
794 | spin_lock_bh(&tgt->tgt_lock); | |
795 | bnx2fc_add_2_sq(tgt, xid); | |
796 | ||
797 | /* Enqueue the io_req to active_tm_queue */ | |
798 | io_req->on_tmf_queue = 1; | |
799 | list_add_tail(&io_req->link, &tgt->active_tm_queue); | |
800 | ||
801 | init_completion(&io_req->tm_done); | |
802 | io_req->wait_for_comp = 1; | |
803 | ||
804 | /* Ring doorbell */ | |
805 | bnx2fc_ring_doorbell(tgt); | |
806 | spin_unlock_bh(&tgt->tgt_lock); | |
807 | ||
808 | rc = wait_for_completion_timeout(&io_req->tm_done, | |
809 | BNX2FC_TM_TIMEOUT * HZ); | |
810 | spin_lock_bh(&tgt->tgt_lock); | |
811 | ||
812 | io_req->wait_for_comp = 0; | |
813 | if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) | |
814 | set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); | |
815 | ||
816 | spin_unlock_bh(&tgt->tgt_lock); | |
817 | ||
818 | if (!rc) { | |
b2a554ff | 819 | BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); |
853e2bd2 BG |
820 | rc = FAILED; |
821 | } else { | |
b2a554ff | 822 | BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); |
853e2bd2 BG |
823 | rc = SUCCESS; |
824 | } | |
825 | tmf_err: | |
826 | return rc; | |
827 | } | |
828 | ||
829 | int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) | |
830 | { | |
831 | struct fc_lport *lport; | |
832 | struct bnx2fc_rport *tgt = io_req->tgt; | |
833 | struct fc_rport *rport = tgt->rport; | |
834 | struct fc_rport_priv *rdata = tgt->rdata; | |
aea71a02 | 835 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
836 | struct fcoe_port *port; |
837 | struct bnx2fc_cmd *abts_io_req; | |
838 | struct fcoe_task_ctx_entry *task; | |
839 | struct fcoe_task_ctx_entry *task_page; | |
840 | struct fc_frame_header *fc_hdr; | |
841 | struct bnx2fc_mp_req *abts_req; | |
842 | int task_idx, index; | |
843 | u32 sid, did; | |
844 | u16 xid; | |
845 | int rc = SUCCESS; | |
846 | u32 r_a_tov = rdata->r_a_tov; | |
847 | ||
848 | /* called with tgt_lock held */ | |
849 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); | |
850 | ||
851 | port = io_req->port; | |
aea71a02 | 852 | interface = port->priv; |
853e2bd2 BG |
853 | lport = port->lport; |
854 | ||
855 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
856 | printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); | |
857 | rc = FAILED; | |
858 | goto abts_err; | |
859 | } | |
860 | ||
861 | if (rport == NULL) { | |
b2a554ff | 862 | printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); |
853e2bd2 BG |
863 | rc = FAILED; |
864 | goto abts_err; | |
865 | } | |
866 | ||
867 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
868 | printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); | |
869 | rc = FAILED; | |
870 | goto abts_err; | |
871 | } | |
872 | ||
873 | abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); | |
874 | if (!abts_io_req) { | |
875 | printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); | |
876 | rc = FAILED; | |
877 | goto abts_err; | |
878 | } | |
879 | ||
880 | /* Initialize rest of io_req fields */ | |
881 | abts_io_req->sc_cmd = NULL; | |
882 | abts_io_req->port = port; | |
883 | abts_io_req->tgt = tgt; | |
884 | abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ | |
885 | ||
886 | abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); | |
887 | memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); | |
888 | ||
889 | /* Fill FC header */ | |
890 | fc_hdr = &(abts_req->req_fc_hdr); | |
891 | ||
892 | /* Obtain oxid and rxid for the original exchange to be aborted */ | |
893 | fc_hdr->fh_ox_id = htons(io_req->xid); | |
619c5cb6 | 894 | fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); |
853e2bd2 BG |
895 | |
896 | sid = tgt->sid; | |
897 | did = rport->port_id; | |
898 | ||
899 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, | |
900 | FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
901 | FC_FC_SEQ_INIT, 0); | |
902 | ||
903 | xid = abts_io_req->xid; | |
904 | BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); | |
905 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
906 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
907 | ||
908 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
909 | task_page = (struct fcoe_task_ctx_entry *) |
910 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
911 | task = &(task_page[index]); |
912 | bnx2fc_init_mp_task(abts_io_req, task); | |
913 | ||
914 | /* | |
915 | * ABTS task is a temporary task that will be cleaned up | |
916 | * irrespective of ABTS response. We need to start the timer | |
917 | * for the original exchange, as the CQE is posted for the original | |
918 | * IO request. | |
919 | * | |
920 | * Timer for ABTS is started only when it is originated by a | |
921 | * TM request. For the ABTS issued as part of ULP timeout, | |
922 | * scsi-ml maintains the timers. | |
923 | */ | |
924 | ||
925 | /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ | |
926 | bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); | |
927 | ||
928 | /* Obtain free SQ entry */ | |
929 | bnx2fc_add_2_sq(tgt, xid); | |
930 | ||
931 | /* Ring doorbell */ | |
932 | bnx2fc_ring_doorbell(tgt); | |
933 | ||
934 | abts_err: | |
935 | return rc; | |
936 | } | |
937 | ||
6c5a7ce4 BPG |
938 | int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, |
939 | enum fc_rctl r_ctl) | |
940 | { | |
941 | struct fc_lport *lport; | |
942 | struct bnx2fc_rport *tgt = orig_io_req->tgt; | |
943 | struct bnx2fc_interface *interface; | |
944 | struct fcoe_port *port; | |
945 | struct bnx2fc_cmd *seq_clnp_req; | |
946 | struct fcoe_task_ctx_entry *task; | |
947 | struct fcoe_task_ctx_entry *task_page; | |
948 | struct bnx2fc_els_cb_arg *cb_arg = NULL; | |
949 | int task_idx, index; | |
950 | u16 xid; | |
951 | int rc = 0; | |
952 | ||
953 | BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", | |
954 | orig_io_req->xid); | |
955 | kref_get(&orig_io_req->refcount); | |
956 | ||
957 | port = orig_io_req->port; | |
958 | interface = port->priv; | |
959 | lport = port->lport; | |
960 | ||
961 | cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); | |
962 | if (!cb_arg) { | |
963 | printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); | |
964 | rc = -ENOMEM; | |
965 | goto cleanup_err; | |
966 | } | |
967 | ||
968 | seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); | |
969 | if (!seq_clnp_req) { | |
970 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); | |
971 | rc = -ENOMEM; | |
972 | kfree(cb_arg); | |
973 | goto cleanup_err; | |
974 | } | |
975 | /* Initialize rest of io_req fields */ | |
976 | seq_clnp_req->sc_cmd = NULL; | |
977 | seq_clnp_req->port = port; | |
978 | seq_clnp_req->tgt = tgt; | |
979 | seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ | |
980 | ||
981 | xid = seq_clnp_req->xid; | |
982 | ||
983 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
984 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
985 | ||
986 | /* Initialize task context for this IO request */ | |
987 | task_page = (struct fcoe_task_ctx_entry *) | |
988 | interface->hba->task_ctx[task_idx]; | |
989 | task = &(task_page[index]); | |
990 | cb_arg->aborted_io_req = orig_io_req; | |
991 | cb_arg->io_req = seq_clnp_req; | |
992 | cb_arg->r_ctl = r_ctl; | |
993 | cb_arg->offset = offset; | |
994 | seq_clnp_req->cb_arg = cb_arg; | |
995 | ||
996 | printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); | |
997 | bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); | |
998 | ||
999 | /* Obtain free SQ entry */ | |
1000 | bnx2fc_add_2_sq(tgt, xid); | |
1001 | ||
1002 | /* Ring doorbell */ | |
1003 | bnx2fc_ring_doorbell(tgt); | |
1004 | cleanup_err: | |
1005 | return rc; | |
1006 | } | |
1007 | ||
853e2bd2 BG |
1008 | int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) |
1009 | { | |
1010 | struct fc_lport *lport; | |
1011 | struct bnx2fc_rport *tgt = io_req->tgt; | |
aea71a02 | 1012 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
1013 | struct fcoe_port *port; |
1014 | struct bnx2fc_cmd *cleanup_io_req; | |
1015 | struct fcoe_task_ctx_entry *task; | |
1016 | struct fcoe_task_ctx_entry *task_page; | |
1017 | int task_idx, index; | |
1018 | u16 xid, orig_xid; | |
1019 | int rc = 0; | |
1020 | ||
1021 | /* ASSUMPTION: called with tgt_lock held */ | |
1022 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); | |
1023 | ||
1024 | port = io_req->port; | |
aea71a02 | 1025 | interface = port->priv; |
853e2bd2 BG |
1026 | lport = port->lport; |
1027 | ||
1028 | cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); | |
1029 | if (!cleanup_io_req) { | |
1030 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); | |
1031 | rc = -1; | |
1032 | goto cleanup_err; | |
1033 | } | |
1034 | ||
1035 | /* Initialize rest of io_req fields */ | |
1036 | cleanup_io_req->sc_cmd = NULL; | |
1037 | cleanup_io_req->port = port; | |
1038 | cleanup_io_req->tgt = tgt; | |
1039 | cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ | |
1040 | ||
1041 | xid = cleanup_io_req->xid; | |
1042 | ||
1043 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
1044 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
1045 | ||
1046 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
1047 | task_page = (struct fcoe_task_ctx_entry *) |
1048 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
1049 | task = &(task_page[index]); |
1050 | orig_xid = io_req->xid; | |
1051 | ||
1052 | BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); | |
1053 | ||
1054 | bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); | |
1055 | ||
1056 | /* Obtain free SQ entry */ | |
1057 | bnx2fc_add_2_sq(tgt, xid); | |
1058 | ||
1059 | /* Ring doorbell */ | |
1060 | bnx2fc_ring_doorbell(tgt); | |
1061 | ||
1062 | cleanup_err: | |
1063 | return rc; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * bnx2fc_eh_target_reset: Reset a target | |
1068 | * | |
1069 | * @sc_cmd: SCSI command | |
1070 | * | |
1071 | * Set from SCSI host template to send task mgmt command to the target | |
1072 | * and wait for the response | |
1073 | */ | |
1074 | int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) | |
1075 | { | |
1076 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * bnx2fc_eh_device_reset - Reset a single LUN | |
1081 | * | |
1082 | * @sc_cmd: SCSI command | |
1083 | * | |
1084 | * Set from SCSI host template to send task mgmt command to the target | |
1085 | * and wait for the response | |
1086 | */ | |
1087 | int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) | |
1088 | { | |
1089 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); | |
1090 | } | |
1091 | ||
1092 | /** | |
1093 | * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding | |
1094 | * SCSI command | |
1095 | * | |
1096 | * @sc_cmd: SCSI_ML command pointer | |
1097 | * | |
1098 | * SCSI abort request handler | |
1099 | */ | |
1100 | int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) | |
1101 | { | |
1102 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1103 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1104 | struct bnx2fc_cmd *io_req; | |
1105 | struct fc_lport *lport; | |
1106 | struct bnx2fc_rport *tgt; | |
1107 | int rc = FAILED; | |
1108 | ||
1109 | ||
1110 | rc = fc_block_scsi_eh(sc_cmd); | |
1111 | if (rc) | |
1112 | return rc; | |
1113 | ||
1114 | lport = shost_priv(sc_cmd->device->host); | |
1115 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
b2a554ff | 1116 | printk(KERN_ERR PFX "eh_abort: link not ready\n"); |
853e2bd2 BG |
1117 | return rc; |
1118 | } | |
1119 | ||
1120 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1121 | ||
1122 | BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); | |
1123 | ||
1124 | spin_lock_bh(&tgt->tgt_lock); | |
1125 | io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; | |
1126 | if (!io_req) { | |
1127 | /* Command might have just completed */ | |
1128 | printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); | |
1129 | spin_unlock_bh(&tgt->tgt_lock); | |
1130 | return SUCCESS; | |
1131 | } | |
1132 | BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", | |
1133 | io_req->refcount.refcount.counter); | |
1134 | ||
1135 | /* Hold IO request across abort processing */ | |
1136 | kref_get(&io_req->refcount); | |
1137 | ||
1138 | BUG_ON(tgt != io_req->tgt); | |
1139 | ||
1140 | /* Remove the io_req from the active_q. */ | |
1141 | /* | |
1142 | * Task Mgmt functions (LUN RESET & TGT RESET) will not | |
1143 | * issue an ABTS on this particular IO req, as the | |
1144 | * io_req is no longer in the active_q. | |
1145 | */ | |
1146 | if (tgt->flush_in_prog) { | |
b2a554ff | 1147 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 BG |
1148 | "flush in progress\n", io_req->xid); |
1149 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1150 | spin_unlock_bh(&tgt->tgt_lock); | |
1151 | return SUCCESS; | |
1152 | } | |
1153 | ||
1154 | if (io_req->on_active_queue == 0) { | |
b2a554ff | 1155 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 BG |
1156 | "not on active_q\n", io_req->xid); |
1157 | /* | |
1158 | * This condition can happen only due to the FW bug, | |
1159 | * where we do not receive cleanup response from | |
1160 | * the FW. Handle this case gracefully by erroring | |
1161 | * back the IO request to SCSI-ml | |
1162 | */ | |
1163 | bnx2fc_scsi_done(io_req, DID_ABORT); | |
1164 | ||
1165 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1166 | spin_unlock_bh(&tgt->tgt_lock); | |
1167 | return SUCCESS; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Only eh_abort processing will remove the IO from | |
1172 | * active_cmd_q before processing the request. this is | |
1173 | * done to avoid race conditions between IOs aborted | |
1174 | * as part of task management completion and eh_abort | |
1175 | * processing | |
1176 | */ | |
1177 | list_del_init(&io_req->link); | |
1178 | io_req->on_active_queue = 0; | |
1179 | /* Move IO req to retire queue */ | |
1180 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1181 | ||
1182 | init_completion(&io_req->tm_done); | |
1183 | io_req->wait_for_comp = 1; | |
1184 | ||
1185 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { | |
1186 | /* Cancel the current timer running on this io_req */ | |
1187 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1188 | kref_put(&io_req->refcount, | |
1189 | bnx2fc_cmd_release); /* drop timer hold */ | |
1190 | set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); | |
1191 | rc = bnx2fc_initiate_abts(io_req); | |
1192 | } else { | |
b2a554ff | 1193 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 BG |
1194 | "already in abts processing\n", io_req->xid); |
1195 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1196 | spin_unlock_bh(&tgt->tgt_lock); | |
1197 | return SUCCESS; | |
1198 | } | |
1199 | if (rc == FAILED) { | |
1200 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1201 | spin_unlock_bh(&tgt->tgt_lock); | |
1202 | return rc; | |
1203 | } | |
1204 | spin_unlock_bh(&tgt->tgt_lock); | |
1205 | ||
1206 | wait_for_completion(&io_req->tm_done); | |
1207 | ||
1208 | spin_lock_bh(&tgt->tgt_lock); | |
1209 | io_req->wait_for_comp = 0; | |
1210 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1211 | &io_req->req_flags))) { | |
1212 | /* Let the scsi-ml try to recover this command */ | |
1213 | printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", | |
1214 | io_req->xid); | |
1215 | rc = FAILED; | |
1216 | } else { | |
1217 | /* | |
1218 | * We come here even when there was a race condition | |
1219 | * between timeout and abts completion, and abts | |
1220 | * completion happens just in time. | |
1221 | */ | |
1222 | BNX2FC_IO_DBG(io_req, "abort succeeded\n"); | |
1223 | rc = SUCCESS; | |
1224 | bnx2fc_scsi_done(io_req, DID_ABORT); | |
1225 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1226 | } | |
1227 | ||
1228 | /* release the reference taken in eh_abort */ | |
1229 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1230 | spin_unlock_bh(&tgt->tgt_lock); | |
1231 | return rc; | |
1232 | } | |
1233 | ||
6c5a7ce4 BPG |
1234 | void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, |
1235 | struct fcoe_task_ctx_entry *task, | |
1236 | u8 rx_state) | |
1237 | { | |
1238 | struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; | |
1239 | struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; | |
1240 | u32 offset = cb_arg->offset; | |
1241 | enum fc_rctl r_ctl = cb_arg->r_ctl; | |
1242 | int rc = 0; | |
1243 | struct bnx2fc_rport *tgt = orig_io_req->tgt; | |
1244 | ||
1245 | BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" | |
1246 | "cmd_type = %d\n", | |
1247 | seq_clnp_req->xid, seq_clnp_req->cmd_type); | |
1248 | ||
1249 | if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { | |
1250 | printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", | |
1251 | seq_clnp_req->xid); | |
1252 | goto free_cb_arg; | |
1253 | } | |
1254 | kref_get(&orig_io_req->refcount); | |
1255 | ||
1256 | spin_unlock_bh(&tgt->tgt_lock); | |
1257 | rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); | |
1258 | spin_lock_bh(&tgt->tgt_lock); | |
1259 | ||
1260 | if (rc) | |
1261 | printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" | |
1262 | " IO will abort\n"); | |
1263 | seq_clnp_req->cb_arg = NULL; | |
1264 | kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); | |
1265 | free_cb_arg: | |
1266 | kfree(cb_arg); | |
1267 | return; | |
1268 | } | |
1269 | ||
853e2bd2 BG |
1270 | void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, |
1271 | struct fcoe_task_ctx_entry *task, | |
1272 | u8 num_rq) | |
1273 | { | |
1274 | BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " | |
1275 | "refcnt = %d, cmd_type = %d\n", | |
1276 | io_req->refcount.refcount.counter, io_req->cmd_type); | |
1277 | bnx2fc_scsi_done(io_req, DID_ERROR); | |
1278 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1279 | } | |
1280 | ||
1281 | void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, | |
1282 | struct fcoe_task_ctx_entry *task, | |
1283 | u8 num_rq) | |
1284 | { | |
1285 | u32 r_ctl; | |
1286 | u32 r_a_tov = FC_DEF_R_A_TOV; | |
1287 | u8 issue_rrq = 0; | |
1288 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1289 | ||
1290 | BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" | |
1291 | "refcnt = %d, cmd_type = %d\n", | |
1292 | io_req->xid, | |
1293 | io_req->refcount.refcount.counter, io_req->cmd_type); | |
1294 | ||
1295 | if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1296 | &io_req->req_flags)) { | |
1297 | BNX2FC_IO_DBG(io_req, "Timer context finished processing" | |
1298 | " this io\n"); | |
1299 | return; | |
1300 | } | |
1301 | ||
1302 | /* Do not issue RRQ as this IO is already cleanedup */ | |
1303 | if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, | |
1304 | &io_req->req_flags)) | |
1305 | goto io_compl; | |
1306 | ||
1307 | /* | |
1308 | * For ABTS issued due to SCSI eh_abort_handler, timeout | |
1309 | * values are maintained by scsi-ml itself. Cancel timeout | |
1310 | * in case ABTS issued as part of task management function | |
1311 | * or due to FW error. | |
1312 | */ | |
1313 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) | |
1314 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1315 | kref_put(&io_req->refcount, | |
1316 | bnx2fc_cmd_release); /* drop timer hold */ | |
1317 | ||
619c5cb6 | 1318 | r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; |
853e2bd2 BG |
1319 | |
1320 | switch (r_ctl) { | |
1321 | case FC_RCTL_BA_ACC: | |
1322 | /* | |
1323 | * Dont release this cmd yet. It will be relesed | |
1324 | * after we get RRQ response | |
1325 | */ | |
1326 | BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); | |
1327 | issue_rrq = 1; | |
1328 | break; | |
1329 | ||
1330 | case FC_RCTL_BA_RJT: | |
1331 | BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); | |
1332 | break; | |
1333 | default: | |
1334 | printk(KERN_ERR PFX "Unknown ABTS response\n"); | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | if (issue_rrq) { | |
1339 | BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); | |
1340 | set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); | |
1341 | } | |
1342 | set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
1343 | bnx2fc_cmd_timer_set(io_req, r_a_tov); | |
1344 | ||
1345 | io_compl: | |
1346 | if (io_req->wait_for_comp) { | |
1347 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1348 | &io_req->req_flags)) | |
1349 | complete(&io_req->tm_done); | |
1350 | } else { | |
1351 | /* | |
1352 | * We end up here when ABTS is issued as | |
1353 | * in asynchronous context, i.e., as part | |
1354 | * of task management completion, or | |
1355 | * when FW error is received or when the | |
1356 | * ABTS is issued when the IO is timed | |
1357 | * out. | |
1358 | */ | |
1359 | ||
1360 | if (io_req->on_active_queue) { | |
1361 | list_del_init(&io_req->link); | |
1362 | io_req->on_active_queue = 0; | |
1363 | /* Move IO req to retire queue */ | |
1364 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1365 | } | |
1366 | bnx2fc_scsi_done(io_req, DID_ERROR); | |
1367 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1372 | { | |
1373 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1374 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1375 | struct list_head *list; | |
1376 | struct list_head *tmp; | |
1377 | struct bnx2fc_cmd *cmd; | |
1378 | int tm_lun = sc_cmd->device->lun; | |
1379 | int rc = 0; | |
1380 | int lun; | |
1381 | ||
1382 | /* called with tgt_lock held */ | |
1383 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); | |
1384 | /* | |
1385 | * Walk thru the active_ios queue and ABORT the IO | |
1386 | * that matches with the LUN that was reset | |
1387 | */ | |
1388 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { | |
1389 | BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); | |
1390 | cmd = (struct bnx2fc_cmd *)list; | |
1391 | lun = cmd->sc_cmd->device->lun; | |
1392 | if (lun == tm_lun) { | |
1393 | /* Initiate ABTS on this cmd */ | |
1394 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1395 | &cmd->req_flags)) { | |
1396 | /* cancel the IO timeout */ | |
1397 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1398 | kref_put(&io_req->refcount, | |
1399 | bnx2fc_cmd_release); | |
1400 | /* timer hold */ | |
1401 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1402 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1403 | WARN_ON(rc != SUCCESS); |
1404 | } else | |
1405 | printk(KERN_ERR PFX "lun_rst: abts already in" | |
1406 | " progress for this IO 0x%x\n", | |
1407 | cmd->xid); | |
1408 | } | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1413 | { | |
1414 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1415 | struct list_head *list; | |
1416 | struct list_head *tmp; | |
1417 | struct bnx2fc_cmd *cmd; | |
1418 | int rc = 0; | |
1419 | ||
1420 | /* called with tgt_lock held */ | |
1421 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); | |
1422 | /* | |
1423 | * Walk thru the active_ios queue and ABORT the IO | |
1424 | * that matches with the LUN that was reset | |
1425 | */ | |
1426 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { | |
1427 | BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); | |
1428 | cmd = (struct bnx2fc_cmd *)list; | |
1429 | /* Initiate ABTS */ | |
1430 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1431 | &cmd->req_flags)) { | |
1432 | /* cancel the IO timeout */ | |
1433 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1434 | kref_put(&io_req->refcount, | |
1435 | bnx2fc_cmd_release); /* timer hold */ | |
1436 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1437 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1438 | WARN_ON(rc != SUCCESS); |
1439 | ||
1440 | } else | |
1441 | printk(KERN_ERR PFX "tgt_rst: abts already in progress" | |
1442 | " for this IO 0x%x\n", cmd->xid); | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, | |
1447 | struct fcoe_task_ctx_entry *task, u8 num_rq) | |
1448 | { | |
1449 | struct bnx2fc_mp_req *tm_req; | |
1450 | struct fc_frame_header *fc_hdr; | |
1451 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1452 | u64 *hdr; | |
1453 | u64 *temp_hdr; | |
1454 | void *rsp_buf; | |
1455 | ||
1456 | /* Called with tgt_lock held */ | |
1457 | BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); | |
1458 | ||
1459 | if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) | |
1460 | set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); | |
1461 | else { | |
1462 | /* TM has already timed out and we got | |
1463 | * delayed completion. Ignore completion | |
1464 | * processing. | |
1465 | */ | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | tm_req = &(io_req->mp_req); | |
1470 | fc_hdr = &(tm_req->resp_fc_hdr); | |
1471 | hdr = (u64 *)fc_hdr; | |
1472 | temp_hdr = (u64 *) | |
619c5cb6 | 1473 | &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; |
853e2bd2 BG |
1474 | hdr[0] = cpu_to_be64(temp_hdr[0]); |
1475 | hdr[1] = cpu_to_be64(temp_hdr[1]); | |
1476 | hdr[2] = cpu_to_be64(temp_hdr[2]); | |
1477 | ||
619c5cb6 VZ |
1478 | tm_req->resp_len = |
1479 | task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; | |
853e2bd2 BG |
1480 | |
1481 | rsp_buf = tm_req->resp_buf; | |
1482 | ||
1483 | if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { | |
1484 | bnx2fc_parse_fcp_rsp(io_req, | |
1485 | (struct fcoe_fcp_rsp_payload *) | |
1486 | rsp_buf, num_rq); | |
1487 | if (io_req->fcp_rsp_code == 0) { | |
1488 | /* TM successful */ | |
1489 | if (tm_req->tm_flags & FCP_TMF_LUN_RESET) | |
1490 | bnx2fc_lun_reset_cmpl(io_req); | |
1491 | else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) | |
1492 | bnx2fc_tgt_reset_cmpl(io_req); | |
1493 | } | |
1494 | } else { | |
1495 | printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", | |
1496 | fc_hdr->fh_r_ctl); | |
1497 | } | |
1498 | if (!sc_cmd->SCp.ptr) { | |
b2a554ff | 1499 | printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); |
853e2bd2 BG |
1500 | return; |
1501 | } | |
1502 | switch (io_req->fcp_status) { | |
1503 | case FC_GOOD: | |
1504 | if (io_req->cdb_status == 0) { | |
1505 | /* Good IO completion */ | |
1506 | sc_cmd->result = DID_OK << 16; | |
1507 | } else { | |
1508 | /* Transport status is good, SCSI status not good */ | |
1509 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1510 | } | |
1511 | if (io_req->fcp_resid) | |
1512 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1513 | break; | |
1514 | ||
1515 | default: | |
1516 | BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", | |
1517 | io_req->fcp_status); | |
1518 | break; | |
1519 | } | |
1520 | ||
1521 | sc_cmd = io_req->sc_cmd; | |
1522 | io_req->sc_cmd = NULL; | |
1523 | ||
1524 | /* check if the io_req exists in tgt's tmf_q */ | |
1525 | if (io_req->on_tmf_queue) { | |
1526 | ||
1527 | list_del_init(&io_req->link); | |
1528 | io_req->on_tmf_queue = 0; | |
1529 | } else { | |
1530 | ||
b2a554ff | 1531 | printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); |
853e2bd2 BG |
1532 | return; |
1533 | } | |
1534 | ||
1535 | sc_cmd->SCp.ptr = NULL; | |
1536 | sc_cmd->scsi_done(sc_cmd); | |
1537 | ||
1538 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1539 | if (io_req->wait_for_comp) { | |
1540 | BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); | |
1541 | complete(&io_req->tm_done); | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, | |
1546 | int bd_index) | |
1547 | { | |
1548 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1549 | int frag_size, sg_frags; | |
1550 | ||
1551 | sg_frags = 0; | |
1552 | while (sg_len) { | |
1553 | if (sg_len >= BNX2FC_BD_SPLIT_SZ) | |
1554 | frag_size = BNX2FC_BD_SPLIT_SZ; | |
1555 | else | |
1556 | frag_size = sg_len; | |
1557 | bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; | |
1558 | bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; | |
1559 | bd[bd_index + sg_frags].buf_len = (u16)frag_size; | |
1560 | bd[bd_index + sg_frags].flags = 0; | |
1561 | ||
1562 | addr += (u64) frag_size; | |
1563 | sg_frags++; | |
1564 | sg_len -= frag_size; | |
1565 | } | |
1566 | return sg_frags; | |
1567 | ||
1568 | } | |
1569 | ||
1570 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) | |
1571 | { | |
1572 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1573 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1574 | struct scatterlist *sg; | |
1575 | int byte_count = 0; | |
1576 | int sg_count = 0; | |
1577 | int bd_count = 0; | |
1578 | int sg_frags; | |
1579 | unsigned int sg_len; | |
1580 | u64 addr; | |
1581 | int i; | |
1582 | ||
1583 | sg_count = scsi_dma_map(sc); | |
1584 | scsi_for_each_sg(sc, sg, sg_count, i) { | |
1585 | sg_len = sg_dma_len(sg); | |
1586 | addr = sg_dma_address(sg); | |
1587 | if (sg_len > BNX2FC_MAX_BD_LEN) { | |
1588 | sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, | |
1589 | bd_count); | |
1590 | } else { | |
1591 | ||
1592 | sg_frags = 1; | |
1593 | bd[bd_count].buf_addr_lo = addr & 0xffffffff; | |
1594 | bd[bd_count].buf_addr_hi = addr >> 32; | |
1595 | bd[bd_count].buf_len = (u16)sg_len; | |
1596 | bd[bd_count].flags = 0; | |
1597 | } | |
1598 | bd_count += sg_frags; | |
1599 | byte_count += sg_len; | |
1600 | } | |
1601 | if (byte_count != scsi_bufflen(sc)) | |
1602 | printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " | |
1603 | "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), | |
1604 | io_req->xid); | |
1605 | return bd_count; | |
1606 | } | |
1607 | ||
1608 | static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) | |
1609 | { | |
1610 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1611 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1612 | int bd_count; | |
1613 | ||
1614 | if (scsi_sg_count(sc)) | |
1615 | bd_count = bnx2fc_map_sg(io_req); | |
1616 | else { | |
1617 | bd_count = 0; | |
1618 | bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; | |
1619 | bd[0].buf_len = bd[0].flags = 0; | |
1620 | } | |
1621 | io_req->bd_tbl->bd_valid = bd_count; | |
1622 | } | |
1623 | ||
1624 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) | |
1625 | { | |
1626 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1627 | ||
1628 | if (io_req->bd_tbl->bd_valid && sc) { | |
1629 | scsi_dma_unmap(sc); | |
1630 | io_req->bd_tbl->bd_valid = 0; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, | |
1635 | struct fcp_cmnd *fcp_cmnd) | |
1636 | { | |
1637 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1638 | char tag[2]; | |
1639 | ||
1640 | memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); | |
1641 | ||
1642 | int_to_scsilun(sc_cmd->device->lun, | |
1643 | (struct scsi_lun *) fcp_cmnd->fc_lun); | |
1644 | ||
1645 | ||
1646 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); | |
1647 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); | |
1648 | ||
1649 | fcp_cmnd->fc_cmdref = 0; | |
1650 | fcp_cmnd->fc_pri_ta = 0; | |
1651 | fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; | |
1652 | fcp_cmnd->fc_flags = io_req->io_req_flags; | |
1653 | ||
1654 | if (scsi_populate_tag_msg(sc_cmd, tag)) { | |
1655 | switch (tag[0]) { | |
1656 | case HEAD_OF_QUEUE_TAG: | |
1657 | fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ; | |
1658 | break; | |
1659 | case ORDERED_QUEUE_TAG: | |
1660 | fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED; | |
1661 | break; | |
1662 | default: | |
1663 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; | |
1664 | break; | |
1665 | } | |
1666 | } else { | |
1667 | fcp_cmnd->fc_pri_ta = 0; | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, | |
1672 | struct fcoe_fcp_rsp_payload *fcp_rsp, | |
1673 | u8 num_rq) | |
1674 | { | |
1675 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1676 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1677 | u8 rsp_flags = fcp_rsp->fcp_flags.flags; | |
1678 | u32 rq_buff_len = 0; | |
1679 | int i; | |
1680 | unsigned char *rq_data; | |
1681 | unsigned char *dummy; | |
1682 | int fcp_sns_len = 0; | |
1683 | int fcp_rsp_len = 0; | |
1684 | ||
1685 | io_req->fcp_status = FC_GOOD; | |
1686 | io_req->fcp_resid = fcp_rsp->fcp_resid; | |
1687 | ||
1688 | io_req->scsi_comp_flags = rsp_flags; | |
1689 | CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = | |
1690 | fcp_rsp->scsi_status_code; | |
1691 | ||
1692 | /* Fetch fcp_rsp_info and fcp_sns_info if available */ | |
1693 | if (num_rq) { | |
1694 | ||
1695 | /* | |
1696 | * We do not anticipate num_rq >1, as the linux defined | |
1697 | * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO | |
1698 | * 256 bytes of single rq buffer is good enough to hold this. | |
1699 | */ | |
1700 | ||
1701 | if (rsp_flags & | |
1702 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { | |
1703 | fcp_rsp_len = rq_buff_len | |
1704 | = fcp_rsp->fcp_rsp_len; | |
1705 | } | |
1706 | ||
1707 | if (rsp_flags & | |
1708 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { | |
1709 | fcp_sns_len = fcp_rsp->fcp_sns_len; | |
1710 | rq_buff_len += fcp_rsp->fcp_sns_len; | |
1711 | } | |
1712 | ||
1713 | io_req->fcp_rsp_len = fcp_rsp_len; | |
1714 | io_req->fcp_sns_len = fcp_sns_len; | |
1715 | ||
1716 | if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { | |
1717 | /* Invalid sense sense length. */ | |
b2a554ff | 1718 | printk(KERN_ERR PFX "invalid sns length %d\n", |
853e2bd2 BG |
1719 | rq_buff_len); |
1720 | /* reset rq_buff_len */ | |
1721 | rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; | |
1722 | } | |
1723 | ||
1724 | rq_data = bnx2fc_get_next_rqe(tgt, 1); | |
1725 | ||
1726 | if (num_rq > 1) { | |
1727 | /* We do not need extra sense data */ | |
1728 | for (i = 1; i < num_rq; i++) | |
1729 | dummy = bnx2fc_get_next_rqe(tgt, 1); | |
1730 | } | |
1731 | ||
1732 | /* fetch fcp_rsp_code */ | |
1733 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { | |
1734 | /* Only for task management function */ | |
1735 | io_req->fcp_rsp_code = rq_data[3]; | |
1736 | printk(KERN_ERR PFX "fcp_rsp_code = %d\n", | |
1737 | io_req->fcp_rsp_code); | |
1738 | } | |
1739 | ||
1740 | /* fetch sense data */ | |
1741 | rq_data += fcp_rsp_len; | |
1742 | ||
1743 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { | |
1744 | printk(KERN_ERR PFX "Truncating sense buffer\n"); | |
1745 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; | |
1746 | } | |
1747 | ||
1748 | memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer)); | |
1749 | if (fcp_sns_len) | |
1750 | memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); | |
1751 | ||
1752 | /* return RQ entries */ | |
1753 | for (i = 0; i < num_rq; i++) | |
1754 | bnx2fc_return_rqe(tgt, 1); | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | /** | |
1759 | * bnx2fc_queuecommand - Queuecommand function of the scsi template | |
1760 | * | |
1761 | * @host: The Scsi_Host the command was issued to | |
1762 | * @sc_cmd: struct scsi_cmnd to be executed | |
1763 | * | |
1764 | * This is the IO strategy routine, called by SCSI-ML | |
1765 | **/ | |
1766 | int bnx2fc_queuecommand(struct Scsi_Host *host, | |
1767 | struct scsi_cmnd *sc_cmd) | |
1768 | { | |
1769 | struct fc_lport *lport = shost_priv(host); | |
1770 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1771 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1772 | struct bnx2fc_rport *tgt; | |
1773 | struct bnx2fc_cmd *io_req; | |
1774 | int rc = 0; | |
1775 | int rval; | |
1776 | ||
1777 | rval = fc_remote_port_chkready(rport); | |
1778 | if (rval) { | |
1779 | sc_cmd->result = rval; | |
1780 | sc_cmd->scsi_done(sc_cmd); | |
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
1785 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1786 | goto exit_qcmd; | |
1787 | } | |
1788 | ||
1789 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
1790 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1791 | ||
1792 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
35dd71ae NNS |
1793 | if (test_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags)) { |
1794 | sc_cmd->result = DID_NO_CONNECT << 16; | |
1795 | sc_cmd->scsi_done(sc_cmd); | |
1796 | return 0; | |
1797 | ||
1798 | } | |
853e2bd2 BG |
1799 | /* |
1800 | * Session is not offloaded yet. Let SCSI-ml retry | |
1801 | * the command. | |
1802 | */ | |
1803 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
1804 | goto exit_qcmd; | |
1805 | } | |
1806 | ||
1807 | io_req = bnx2fc_cmd_alloc(tgt); | |
1808 | if (!io_req) { | |
1809 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1810 | goto exit_qcmd; | |
1811 | } | |
1812 | io_req->sc_cmd = sc_cmd; | |
1813 | ||
1814 | if (bnx2fc_post_io_req(tgt, io_req)) { | |
1815 | printk(KERN_ERR PFX "Unable to post io_req\n"); | |
1816 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1817 | goto exit_qcmd; | |
1818 | } | |
1819 | exit_qcmd: | |
1820 | return rc; | |
1821 | } | |
1822 | ||
1823 | void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, | |
1824 | struct fcoe_task_ctx_entry *task, | |
1825 | u8 num_rq) | |
1826 | { | |
1827 | struct fcoe_fcp_rsp_payload *fcp_rsp; | |
1828 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1829 | struct scsi_cmnd *sc_cmd; | |
1830 | struct Scsi_Host *host; | |
1831 | ||
1832 | ||
1833 | /* scsi_cmd_cmpl is called with tgt lock held */ | |
1834 | ||
1835 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { | |
1836 | /* we will not receive ABTS response for this IO */ | |
1837 | BNX2FC_IO_DBG(io_req, "Timer context finished processing " | |
1838 | "this scsi cmd\n"); | |
1839 | } | |
1840 | ||
1841 | /* Cancel the timeout_work, as we received IO completion */ | |
1842 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1843 | kref_put(&io_req->refcount, | |
1844 | bnx2fc_cmd_release); /* drop timer hold */ | |
1845 | ||
1846 | sc_cmd = io_req->sc_cmd; | |
1847 | if (sc_cmd == NULL) { | |
1848 | printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); | |
1849 | return; | |
1850 | } | |
1851 | ||
1852 | /* Fetch fcp_rsp from task context and perform cmd completion */ | |
1853 | fcp_rsp = (struct fcoe_fcp_rsp_payload *) | |
619c5cb6 | 1854 | &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); |
853e2bd2 BG |
1855 | |
1856 | /* parse fcp_rsp and obtain sense data from RQ if available */ | |
1857 | bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); | |
1858 | ||
1859 | host = sc_cmd->device->host; | |
1860 | if (!sc_cmd->SCp.ptr) { | |
1861 | printk(KERN_ERR PFX "SCp.ptr is NULL\n"); | |
1862 | return; | |
1863 | } | |
853e2bd2 BG |
1864 | |
1865 | if (io_req->on_active_queue) { | |
1866 | list_del_init(&io_req->link); | |
1867 | io_req->on_active_queue = 0; | |
1868 | /* Move IO req to retire queue */ | |
1869 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1870 | } else { | |
1871 | /* This should not happen, but could have been pulled | |
1872 | * by bnx2fc_flush_active_ios(), or during a race | |
1873 | * between command abort and (late) completion. | |
1874 | */ | |
1875 | BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); | |
1876 | if (io_req->wait_for_comp) | |
1877 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1878 | &io_req->req_flags)) | |
1879 | complete(&io_req->tm_done); | |
1880 | } | |
1881 | ||
1882 | bnx2fc_unmap_sg_list(io_req); | |
b5a95fe7 | 1883 | io_req->sc_cmd = NULL; |
853e2bd2 BG |
1884 | |
1885 | switch (io_req->fcp_status) { | |
1886 | case FC_GOOD: | |
1887 | if (io_req->cdb_status == 0) { | |
1888 | /* Good IO completion */ | |
1889 | sc_cmd->result = DID_OK << 16; | |
1890 | } else { | |
1891 | /* Transport status is good, SCSI status not good */ | |
1892 | BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" | |
1893 | " fcp_resid = 0x%x\n", | |
1894 | io_req->cdb_status, io_req->fcp_resid); | |
1895 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1896 | } | |
1897 | if (io_req->fcp_resid) | |
1898 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1899 | break; | |
1900 | default: | |
b2a554ff | 1901 | printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", |
853e2bd2 BG |
1902 | io_req->fcp_status); |
1903 | break; | |
1904 | } | |
1905 | sc_cmd->SCp.ptr = NULL; | |
1906 | sc_cmd->scsi_done(sc_cmd); | |
1907 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1908 | } | |
1909 | ||
74446954 | 1910 | int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, |
853e2bd2 BG |
1911 | struct bnx2fc_cmd *io_req) |
1912 | { | |
1913 | struct fcoe_task_ctx_entry *task; | |
1914 | struct fcoe_task_ctx_entry *task_page; | |
1915 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1916 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
1917 | struct bnx2fc_interface *interface = port->priv; |
1918 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
1919 | struct fc_lport *lport = port->lport; |
1920 | struct fcoe_dev_stats *stats; | |
1921 | int task_idx, index; | |
1922 | u16 xid; | |
1923 | ||
1924 | /* Initialize rest of io_req fields */ | |
1925 | io_req->cmd_type = BNX2FC_SCSI_CMD; | |
1926 | io_req->port = port; | |
1927 | io_req->tgt = tgt; | |
1928 | io_req->data_xfer_len = scsi_bufflen(sc_cmd); | |
1929 | sc_cmd->SCp.ptr = (char *)io_req; | |
1930 | ||
1931 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); | |
1932 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
1933 | io_req->io_req_flags = BNX2FC_READ; | |
1934 | stats->InputRequests++; | |
1935 | stats->InputBytes += io_req->data_xfer_len; | |
1936 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1937 | io_req->io_req_flags = BNX2FC_WRITE; | |
1938 | stats->OutputRequests++; | |
1939 | stats->OutputBytes += io_req->data_xfer_len; | |
1940 | } else { | |
1941 | io_req->io_req_flags = 0; | |
1942 | stats->ControlRequests++; | |
1943 | } | |
1944 | put_cpu(); | |
1945 | ||
1946 | xid = io_req->xid; | |
1947 | ||
1948 | /* Build buffer descriptor list for firmware from sg list */ | |
1949 | bnx2fc_build_bd_list_from_sg(io_req); | |
1950 | ||
1951 | task_idx = xid / BNX2FC_TASKS_PER_PAGE; | |
1952 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
1953 | ||
1954 | /* Initialize task context for this IO request */ | |
1955 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
1956 | task = &(task_page[index]); | |
1957 | bnx2fc_init_task(io_req, task); | |
1958 | ||
1959 | spin_lock_bh(&tgt->tgt_lock); | |
1960 | ||
1961 | if (tgt->flush_in_prog) { | |
1962 | printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); | |
1963 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1964 | spin_unlock_bh(&tgt->tgt_lock); | |
1965 | return -EAGAIN; | |
1966 | } | |
1967 | ||
1968 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
1969 | printk(KERN_ERR PFX "Session not ready...post_io\n"); | |
1970 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1971 | spin_unlock_bh(&tgt->tgt_lock); | |
1972 | return -EAGAIN; | |
1973 | } | |
1974 | ||
1975 | /* Time IO req */ | |
b252f4c7 BPG |
1976 | if (tgt->io_timeout) |
1977 | bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); | |
853e2bd2 BG |
1978 | /* Obtain free SQ entry */ |
1979 | bnx2fc_add_2_sq(tgt, xid); | |
1980 | ||
1981 | /* Enqueue the io_req to active_cmd_queue */ | |
1982 | ||
1983 | io_req->on_active_queue = 1; | |
1984 | /* move io_req from pending_queue to active_queue */ | |
1985 | list_add_tail(&io_req->link, &tgt->active_cmd_queue); | |
1986 | ||
1987 | /* Ring doorbell */ | |
1988 | bnx2fc_ring_doorbell(tgt); | |
1989 | spin_unlock_bh(&tgt->tgt_lock); | |
1990 | return 0; | |
1991 | } |