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Commit | Line | Data |
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de909d87 | 1 | /* bnx2fc_io.c: QLogic Linux FCoE offload driver. |
853e2bd2 BG |
2 | * IO manager and SCSI IO processing. |
3 | * | |
97586090 | 4 | * Copyright (c) 2008-2013 Broadcom Corporation |
21144b80 CD |
5 | * Copyright (c) 2014-2016 QLogic Corporation |
6 | * Copyright (c) 2016-2017 Cavium Inc. | |
853e2bd2 BG |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation. | |
11 | * | |
12 | * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) | |
13 | */ | |
14 | ||
15 | #include "bnx2fc.h" | |
0ea5c275 BG |
16 | |
17 | #define RESERVE_FREE_LIST_INDEX num_possible_cpus() | |
18 | ||
853e2bd2 BG |
19 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, |
20 | int bd_index); | |
21 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); | |
822f2903 | 22 | static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); |
853e2bd2 BG |
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 | { | |
aea71a02 | 32 | struct bnx2fc_interface *interface = io_req->port->priv; |
853e2bd2 | 33 | |
aea71a02 BPG |
34 | if (queue_delayed_work(interface->timer_work_queue, |
35 | &io_req->timeout_work, | |
36 | msecs_to_jiffies(timer_msec))) | |
853e2bd2 BG |
37 | kref_get(&io_req->refcount); |
38 | } | |
39 | ||
40 | static void bnx2fc_cmd_timeout(struct work_struct *work) | |
41 | { | |
42 | struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, | |
43 | timeout_work.work); | |
853e2bd2 BG |
44 | u8 cmd_type = io_req->cmd_type; |
45 | struct bnx2fc_rport *tgt = io_req->tgt; | |
853e2bd2 BG |
46 | int rc; |
47 | ||
48 | BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," | |
49 | "req_flags = %lx\n", cmd_type, io_req->req_flags); | |
50 | ||
51 | spin_lock_bh(&tgt->tgt_lock); | |
52 | if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { | |
53 | clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
54 | /* | |
55 | * ideally we should hold the io_req until RRQ complets, | |
56 | * and release io_req from timeout hold. | |
57 | */ | |
58 | spin_unlock_bh(&tgt->tgt_lock); | |
59 | bnx2fc_send_rrq(io_req); | |
60 | return; | |
61 | } | |
62 | if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { | |
63 | BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); | |
64 | goto done; | |
65 | } | |
66 | ||
67 | switch (cmd_type) { | |
68 | case BNX2FC_SCSI_CMD: | |
69 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
70 | &io_req->req_flags)) { | |
71 | /* Handle eh_abort timeout */ | |
72 | BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); | |
73 | complete(&io_req->tm_done); | |
74 | } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
75 | &io_req->req_flags)) { | |
76 | /* Handle internally generated ABTS timeout */ | |
77 | BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", | |
2c935bc5 | 78 | kref_read(&io_req->refcount)); |
853e2bd2 BG |
79 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
80 | &io_req->req_flags))) { | |
50a87414 CD |
81 | /* |
82 | * Cleanup and return original command to | |
83 | * mid-layer. | |
84 | */ | |
85 | bnx2fc_initiate_cleanup(io_req); | |
853e2bd2 BG |
86 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
87 | spin_unlock_bh(&tgt->tgt_lock); | |
88 | ||
853e2bd2 BG |
89 | return; |
90 | } | |
91 | } else { | |
92 | /* Hanlde IO timeout */ | |
93 | BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); | |
94 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, | |
95 | &io_req->req_flags)) { | |
96 | BNX2FC_IO_DBG(io_req, "IO completed before " | |
97 | " timer expiry\n"); | |
98 | goto done; | |
99 | } | |
100 | ||
101 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
102 | &io_req->req_flags)) { | |
103 | rc = bnx2fc_initiate_abts(io_req); | |
104 | if (rc == SUCCESS) | |
105 | goto done; | |
50a87414 | 106 | |
853e2bd2 BG |
107 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
108 | spin_unlock_bh(&tgt->tgt_lock); | |
109 | ||
853e2bd2 BG |
110 | return; |
111 | } else { | |
112 | BNX2FC_IO_DBG(io_req, "IO already in " | |
113 | "ABTS processing\n"); | |
114 | } | |
115 | } | |
116 | break; | |
117 | case BNX2FC_ELS: | |
118 | ||
119 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { | |
120 | BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); | |
121 | ||
122 | if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
123 | &io_req->req_flags)) { | |
853e2bd2 BG |
124 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
125 | spin_unlock_bh(&tgt->tgt_lock); | |
126 | ||
853e2bd2 BG |
127 | return; |
128 | } | |
129 | } else { | |
130 | /* | |
131 | * Handle ELS timeout. | |
132 | * tgt_lock is used to sync compl path and timeout | |
133 | * path. If els compl path is processing this IO, we | |
134 | * have nothing to do here, just release the timer hold | |
135 | */ | |
136 | BNX2FC_IO_DBG(io_req, "ELS timed out\n"); | |
137 | if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, | |
138 | &io_req->req_flags)) | |
139 | goto done; | |
140 | ||
141 | /* Indicate the cb_func that this ELS is timed out */ | |
142 | set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); | |
143 | ||
144 | if ((io_req->cb_func) && (io_req->cb_arg)) { | |
145 | io_req->cb_func(io_req->cb_arg); | |
146 | io_req->cb_arg = NULL; | |
147 | } | |
148 | } | |
149 | break; | |
150 | default: | |
151 | printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", | |
152 | cmd_type); | |
153 | break; | |
154 | } | |
155 | ||
156 | done: | |
157 | /* release the cmd that was held when timer was set */ | |
158 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
159 | spin_unlock_bh(&tgt->tgt_lock); | |
160 | } | |
161 | ||
162 | static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) | |
163 | { | |
164 | /* Called with host lock held */ | |
165 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
166 | ||
167 | /* | |
168 | * active_cmd_queue may have other command types as well, | |
169 | * and during flush operation, we want to error back only | |
170 | * scsi commands. | |
171 | */ | |
172 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) | |
173 | return; | |
174 | ||
175 | BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); | |
74446954 BPG |
176 | if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { |
177 | /* Do not call scsi done for this IO */ | |
178 | return; | |
179 | } | |
180 | ||
853e2bd2 BG |
181 | bnx2fc_unmap_sg_list(io_req); |
182 | io_req->sc_cmd = NULL; | |
d02327a8 CD |
183 | |
184 | /* Sanity checks before returning command to mid-layer */ | |
853e2bd2 BG |
185 | if (!sc_cmd) { |
186 | printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " | |
187 | "IO(0x%x) already cleaned up\n", | |
188 | io_req->xid); | |
189 | return; | |
190 | } | |
d02327a8 CD |
191 | if (!sc_cmd->device) { |
192 | pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid); | |
193 | return; | |
194 | } | |
195 | if (!sc_cmd->device->host) { | |
196 | pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n", | |
197 | io_req->xid); | |
198 | return; | |
199 | } | |
200 | ||
853e2bd2 BG |
201 | sc_cmd->result = err_code << 16; |
202 | ||
203 | BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", | |
204 | sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, | |
205 | sc_cmd->allowed); | |
206 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); | |
207 | sc_cmd->SCp.ptr = NULL; | |
208 | sc_cmd->scsi_done(sc_cmd); | |
209 | } | |
210 | ||
0eb43b4b | 211 | struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba) |
853e2bd2 BG |
212 | { |
213 | struct bnx2fc_cmd_mgr *cmgr; | |
214 | struct io_bdt *bdt_info; | |
215 | struct bnx2fc_cmd *io_req; | |
216 | size_t len; | |
217 | u32 mem_size; | |
218 | u16 xid; | |
219 | int i; | |
0ea5c275 | 220 | int num_ios, num_pri_ios; |
853e2bd2 | 221 | size_t bd_tbl_sz; |
0ea5c275 | 222 | int arr_sz = num_possible_cpus() + 1; |
0eb43b4b BPG |
223 | u16 min_xid = BNX2FC_MIN_XID; |
224 | u16 max_xid = hba->max_xid; | |
853e2bd2 BG |
225 | |
226 | if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { | |
227 | printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ | |
228 | and max_xid 0x%x\n", min_xid, max_xid); | |
229 | return NULL; | |
230 | } | |
231 | BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); | |
232 | ||
233 | num_ios = max_xid - min_xid + 1; | |
234 | len = (num_ios * (sizeof(struct bnx2fc_cmd *))); | |
235 | len += sizeof(struct bnx2fc_cmd_mgr); | |
236 | ||
237 | cmgr = kzalloc(len, GFP_KERNEL); | |
238 | if (!cmgr) { | |
239 | printk(KERN_ERR PFX "failed to alloc cmgr\n"); | |
240 | return NULL; | |
241 | } | |
242 | ||
b2d3492f | 243 | cmgr->hba = hba; |
6396bb22 KC |
244 | cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list), |
245 | GFP_KERNEL); | |
853e2bd2 BG |
246 | if (!cmgr->free_list) { |
247 | printk(KERN_ERR PFX "failed to alloc free_list\n"); | |
248 | goto mem_err; | |
249 | } | |
250 | ||
6396bb22 KC |
251 | cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock), |
252 | GFP_KERNEL); | |
853e2bd2 BG |
253 | if (!cmgr->free_list_lock) { |
254 | printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); | |
9172b763 ML |
255 | kfree(cmgr->free_list); |
256 | cmgr->free_list = NULL; | |
853e2bd2 BG |
257 | goto mem_err; |
258 | } | |
259 | ||
853e2bd2 BG |
260 | cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); |
261 | ||
0ea5c275 | 262 | for (i = 0; i < arr_sz; i++) { |
853e2bd2 BG |
263 | INIT_LIST_HEAD(&cmgr->free_list[i]); |
264 | spin_lock_init(&cmgr->free_list_lock[i]); | |
265 | } | |
266 | ||
0ea5c275 BG |
267 | /* |
268 | * Pre-allocated pool of bnx2fc_cmds. | |
269 | * Last entry in the free list array is the free list | |
270 | * of slow path requests. | |
271 | */ | |
853e2bd2 | 272 | xid = BNX2FC_MIN_XID; |
0eb43b4b | 273 | num_pri_ios = num_ios - hba->elstm_xids; |
853e2bd2 BG |
274 | for (i = 0; i < num_ios; i++) { |
275 | io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); | |
276 | ||
277 | if (!io_req) { | |
278 | printk(KERN_ERR PFX "failed to alloc io_req\n"); | |
279 | goto mem_err; | |
280 | } | |
281 | ||
282 | INIT_LIST_HEAD(&io_req->link); | |
283 | INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); | |
284 | ||
285 | io_req->xid = xid++; | |
0ea5c275 BG |
286 | if (i < num_pri_ios) |
287 | list_add_tail(&io_req->link, | |
288 | &cmgr->free_list[io_req->xid % | |
289 | num_possible_cpus()]); | |
290 | else | |
291 | list_add_tail(&io_req->link, | |
292 | &cmgr->free_list[num_possible_cpus()]); | |
853e2bd2 BG |
293 | io_req++; |
294 | } | |
295 | ||
296 | /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ | |
297 | mem_size = num_ios * sizeof(struct io_bdt *); | |
b2d3492f | 298 | cmgr->io_bdt_pool = kzalloc(mem_size, GFP_KERNEL); |
853e2bd2 BG |
299 | if (!cmgr->io_bdt_pool) { |
300 | printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); | |
301 | goto mem_err; | |
302 | } | |
303 | ||
304 | mem_size = sizeof(struct io_bdt); | |
305 | for (i = 0; i < num_ios; i++) { | |
306 | cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); | |
307 | if (!cmgr->io_bdt_pool[i]) { | |
308 | printk(KERN_ERR PFX "failed to alloc " | |
309 | "io_bdt_pool[%d]\n", i); | |
310 | goto mem_err; | |
311 | } | |
312 | } | |
313 | ||
314 | /* Allocate an map fcoe_bdt_ctx structures */ | |
315 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
316 | for (i = 0; i < num_ios; i++) { | |
317 | bdt_info = cmgr->io_bdt_pool[i]; | |
318 | bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, | |
319 | bd_tbl_sz, | |
320 | &bdt_info->bd_tbl_dma, | |
321 | GFP_KERNEL); | |
322 | if (!bdt_info->bd_tbl) { | |
323 | printk(KERN_ERR PFX "failed to alloc " | |
324 | "bdt_tbl[%d]\n", i); | |
325 | goto mem_err; | |
326 | } | |
327 | } | |
328 | ||
329 | return cmgr; | |
330 | ||
331 | mem_err: | |
332 | bnx2fc_cmd_mgr_free(cmgr); | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) | |
337 | { | |
338 | struct io_bdt *bdt_info; | |
339 | struct bnx2fc_hba *hba = cmgr->hba; | |
340 | size_t bd_tbl_sz; | |
341 | u16 min_xid = BNX2FC_MIN_XID; | |
0eb43b4b | 342 | u16 max_xid = hba->max_xid; |
853e2bd2 BG |
343 | int num_ios; |
344 | int i; | |
345 | ||
346 | num_ios = max_xid - min_xid + 1; | |
347 | ||
348 | /* Free fcoe_bdt_ctx structures */ | |
349 | if (!cmgr->io_bdt_pool) | |
350 | goto free_cmd_pool; | |
351 | ||
352 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); | |
353 | for (i = 0; i < num_ios; i++) { | |
354 | bdt_info = cmgr->io_bdt_pool[i]; | |
355 | if (bdt_info->bd_tbl) { | |
356 | dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, | |
357 | bdt_info->bd_tbl, | |
358 | bdt_info->bd_tbl_dma); | |
359 | bdt_info->bd_tbl = NULL; | |
360 | } | |
361 | } | |
362 | ||
363 | /* Destroy io_bdt pool */ | |
364 | for (i = 0; i < num_ios; i++) { | |
365 | kfree(cmgr->io_bdt_pool[i]); | |
366 | cmgr->io_bdt_pool[i] = NULL; | |
367 | } | |
368 | ||
369 | kfree(cmgr->io_bdt_pool); | |
370 | cmgr->io_bdt_pool = NULL; | |
371 | ||
372 | free_cmd_pool: | |
373 | kfree(cmgr->free_list_lock); | |
374 | ||
375 | /* Destroy cmd pool */ | |
376 | if (!cmgr->free_list) | |
377 | goto free_cmgr; | |
378 | ||
0ea5c275 | 379 | for (i = 0; i < num_possible_cpus() + 1; i++) { |
d71fb3bd | 380 | struct bnx2fc_cmd *tmp, *io_req; |
853e2bd2 | 381 | |
d71fb3bd BPG |
382 | list_for_each_entry_safe(io_req, tmp, |
383 | &cmgr->free_list[i], link) { | |
853e2bd2 BG |
384 | list_del(&io_req->link); |
385 | kfree(io_req); | |
386 | } | |
387 | } | |
388 | kfree(cmgr->free_list); | |
389 | free_cmgr: | |
390 | /* Free command manager itself */ | |
391 | kfree(cmgr); | |
392 | } | |
393 | ||
394 | struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) | |
395 | { | |
396 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
397 | struct bnx2fc_interface *interface = port->priv; |
398 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; | |
853e2bd2 BG |
399 | struct bnx2fc_cmd *io_req; |
400 | struct list_head *listp; | |
401 | struct io_bdt *bd_tbl; | |
0ea5c275 | 402 | int index = RESERVE_FREE_LIST_INDEX; |
619c5cb6 | 403 | u32 free_sqes; |
853e2bd2 BG |
404 | u32 max_sqes; |
405 | u16 xid; | |
406 | ||
407 | max_sqes = tgt->max_sqes; | |
408 | switch (type) { | |
409 | case BNX2FC_TASK_MGMT_CMD: | |
410 | max_sqes = BNX2FC_TM_MAX_SQES; | |
411 | break; | |
412 | case BNX2FC_ELS: | |
413 | max_sqes = BNX2FC_ELS_MAX_SQES; | |
414 | break; | |
415 | default: | |
416 | break; | |
417 | } | |
418 | ||
419 | /* | |
420 | * NOTE: Free list insertions and deletions are protected with | |
421 | * cmgr lock | |
422 | */ | |
0ea5c275 | 423 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
619c5cb6 | 424 | free_sqes = atomic_read(&tgt->free_sqes); |
0ea5c275 | 425 | if ((list_empty(&(cmd_mgr->free_list[index]))) || |
619c5cb6 VZ |
426 | (tgt->num_active_ios.counter >= max_sqes) || |
427 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { | |
853e2bd2 BG |
428 | BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " |
429 | "ios(%d):sqes(%d)\n", | |
430 | tgt->num_active_ios.counter, tgt->max_sqes); | |
0ea5c275 | 431 | if (list_empty(&(cmd_mgr->free_list[index]))) |
853e2bd2 | 432 | printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); |
0ea5c275 | 433 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
434 | return NULL; |
435 | } | |
436 | ||
437 | listp = (struct list_head *) | |
0ea5c275 | 438 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
439 | list_del_init(listp); |
440 | io_req = (struct bnx2fc_cmd *) listp; | |
441 | xid = io_req->xid; | |
442 | cmd_mgr->cmds[xid] = io_req; | |
443 | atomic_inc(&tgt->num_active_ios); | |
619c5cb6 | 444 | atomic_dec(&tgt->free_sqes); |
0ea5c275 | 445 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
853e2bd2 BG |
446 | |
447 | INIT_LIST_HEAD(&io_req->link); | |
448 | ||
449 | io_req->port = port; | |
450 | io_req->cmd_mgr = cmd_mgr; | |
451 | io_req->req_flags = 0; | |
452 | io_req->cmd_type = type; | |
453 | ||
454 | /* Bind io_bdt for this io_req */ | |
455 | /* Have a static link between io_req and io_bdt_pool */ | |
456 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
457 | bd_tbl->io_req = io_req; | |
458 | ||
459 | /* Hold the io_req against deletion */ | |
460 | kref_init(&io_req->refcount); | |
461 | return io_req; | |
462 | } | |
aea71a02 BPG |
463 | |
464 | struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) | |
853e2bd2 BG |
465 | { |
466 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
467 | struct bnx2fc_interface *interface = port->priv; |
468 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; | |
853e2bd2 BG |
469 | struct bnx2fc_cmd *io_req; |
470 | struct list_head *listp; | |
471 | struct io_bdt *bd_tbl; | |
619c5cb6 | 472 | u32 free_sqes; |
853e2bd2 BG |
473 | u32 max_sqes; |
474 | u16 xid; | |
0ea5c275 | 475 | int index = get_cpu(); |
853e2bd2 BG |
476 | |
477 | max_sqes = BNX2FC_SCSI_MAX_SQES; | |
478 | /* | |
479 | * NOTE: Free list insertions and deletions are protected with | |
480 | * cmgr lock | |
481 | */ | |
0ea5c275 | 482 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
619c5cb6 | 483 | free_sqes = atomic_read(&tgt->free_sqes); |
0ea5c275 | 484 | if ((list_empty(&cmd_mgr->free_list[index])) || |
619c5cb6 VZ |
485 | (tgt->num_active_ios.counter >= max_sqes) || |
486 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { | |
0ea5c275 BG |
487 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
488 | put_cpu(); | |
853e2bd2 BG |
489 | return NULL; |
490 | } | |
491 | ||
492 | listp = (struct list_head *) | |
0ea5c275 | 493 | cmd_mgr->free_list[index].next; |
853e2bd2 BG |
494 | list_del_init(listp); |
495 | io_req = (struct bnx2fc_cmd *) listp; | |
496 | xid = io_req->xid; | |
497 | cmd_mgr->cmds[xid] = io_req; | |
498 | atomic_inc(&tgt->num_active_ios); | |
619c5cb6 | 499 | atomic_dec(&tgt->free_sqes); |
0ea5c275 BG |
500 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
501 | put_cpu(); | |
853e2bd2 BG |
502 | |
503 | INIT_LIST_HEAD(&io_req->link); | |
504 | ||
505 | io_req->port = port; | |
506 | io_req->cmd_mgr = cmd_mgr; | |
507 | io_req->req_flags = 0; | |
508 | ||
509 | /* Bind io_bdt for this io_req */ | |
510 | /* Have a static link between io_req and io_bdt_pool */ | |
511 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
512 | bd_tbl->io_req = io_req; | |
513 | ||
514 | /* Hold the io_req against deletion */ | |
515 | kref_init(&io_req->refcount); | |
516 | return io_req; | |
517 | } | |
518 | ||
519 | void bnx2fc_cmd_release(struct kref *ref) | |
520 | { | |
521 | struct bnx2fc_cmd *io_req = container_of(ref, | |
522 | struct bnx2fc_cmd, refcount); | |
523 | struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; | |
0ea5c275 BG |
524 | int index; |
525 | ||
526 | if (io_req->cmd_type == BNX2FC_SCSI_CMD) | |
527 | index = io_req->xid % num_possible_cpus(); | |
528 | else | |
529 | index = RESERVE_FREE_LIST_INDEX; | |
853e2bd2 | 530 | |
0ea5c275 BG |
531 | |
532 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); | |
853e2bd2 BG |
533 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
534 | bnx2fc_free_mp_resc(io_req); | |
535 | cmd_mgr->cmds[io_req->xid] = NULL; | |
536 | /* Delete IO from retire queue */ | |
537 | list_del_init(&io_req->link); | |
538 | /* Add it to the free list */ | |
539 | list_add(&io_req->link, | |
0ea5c275 | 540 | &cmd_mgr->free_list[index]); |
853e2bd2 | 541 | atomic_dec(&io_req->tgt->num_active_ios); |
0ea5c275 BG |
542 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
543 | ||
853e2bd2 BG |
544 | } |
545 | ||
546 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) | |
547 | { | |
548 | struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); | |
aea71a02 BPG |
549 | struct bnx2fc_interface *interface = io_req->port->priv; |
550 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
551 | size_t sz = sizeof(struct fcoe_bd_ctx); |
552 | ||
553 | /* clear tm flags */ | |
554 | mp_req->tm_flags = 0; | |
555 | if (mp_req->mp_req_bd) { | |
556 | dma_free_coherent(&hba->pcidev->dev, sz, | |
557 | mp_req->mp_req_bd, | |
558 | mp_req->mp_req_bd_dma); | |
559 | mp_req->mp_req_bd = NULL; | |
560 | } | |
561 | if (mp_req->mp_resp_bd) { | |
562 | dma_free_coherent(&hba->pcidev->dev, sz, | |
563 | mp_req->mp_resp_bd, | |
564 | mp_req->mp_resp_bd_dma); | |
565 | mp_req->mp_resp_bd = NULL; | |
566 | } | |
567 | if (mp_req->req_buf) { | |
be1fefc2 | 568 | dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, |
853e2bd2 BG |
569 | mp_req->req_buf, |
570 | mp_req->req_buf_dma); | |
571 | mp_req->req_buf = NULL; | |
572 | } | |
573 | if (mp_req->resp_buf) { | |
be1fefc2 | 574 | dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, |
853e2bd2 BG |
575 | mp_req->resp_buf, |
576 | mp_req->resp_buf_dma); | |
577 | mp_req->resp_buf = NULL; | |
578 | } | |
579 | } | |
580 | ||
581 | int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) | |
582 | { | |
583 | struct bnx2fc_mp_req *mp_req; | |
584 | struct fcoe_bd_ctx *mp_req_bd; | |
585 | struct fcoe_bd_ctx *mp_resp_bd; | |
aea71a02 BPG |
586 | struct bnx2fc_interface *interface = io_req->port->priv; |
587 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
588 | dma_addr_t addr; |
589 | size_t sz; | |
590 | ||
591 | mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
592 | memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); | |
593 | ||
1fffa199 CD |
594 | if (io_req->cmd_type != BNX2FC_ELS) { |
595 | mp_req->req_len = sizeof(struct fcp_cmnd); | |
596 | io_req->data_xfer_len = mp_req->req_len; | |
597 | } else | |
598 | mp_req->req_len = io_req->data_xfer_len; | |
599 | ||
be1fefc2 | 600 | mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, |
853e2bd2 BG |
601 | &mp_req->req_buf_dma, |
602 | GFP_ATOMIC); | |
603 | if (!mp_req->req_buf) { | |
604 | printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); | |
605 | bnx2fc_free_mp_resc(io_req); | |
606 | return FAILED; | |
607 | } | |
608 | ||
be1fefc2 | 609 | mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, |
853e2bd2 BG |
610 | &mp_req->resp_buf_dma, |
611 | GFP_ATOMIC); | |
612 | if (!mp_req->resp_buf) { | |
613 | printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); | |
614 | bnx2fc_free_mp_resc(io_req); | |
615 | return FAILED; | |
616 | } | |
be1fefc2 MC |
617 | memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE); |
618 | memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE); | |
853e2bd2 BG |
619 | |
620 | /* Allocate and map mp_req_bd and mp_resp_bd */ | |
621 | sz = sizeof(struct fcoe_bd_ctx); | |
622 | mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
623 | &mp_req->mp_req_bd_dma, | |
624 | GFP_ATOMIC); | |
625 | if (!mp_req->mp_req_bd) { | |
626 | printk(KERN_ERR PFX "unable to alloc MP req bd\n"); | |
627 | bnx2fc_free_mp_resc(io_req); | |
628 | return FAILED; | |
629 | } | |
630 | mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, | |
631 | &mp_req->mp_resp_bd_dma, | |
632 | GFP_ATOMIC); | |
b0d5e15c | 633 | if (!mp_req->mp_resp_bd) { |
853e2bd2 BG |
634 | printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); |
635 | bnx2fc_free_mp_resc(io_req); | |
636 | return FAILED; | |
637 | } | |
638 | /* Fill bd table */ | |
639 | addr = mp_req->req_buf_dma; | |
640 | mp_req_bd = mp_req->mp_req_bd; | |
641 | mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
642 | mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
be1fefc2 | 643 | mp_req_bd->buf_len = CNIC_PAGE_SIZE; |
853e2bd2 BG |
644 | mp_req_bd->flags = 0; |
645 | ||
646 | /* | |
647 | * MP buffer is either a task mgmt command or an ELS. | |
648 | * So the assumption is that it consumes a single bd | |
649 | * entry in the bd table | |
650 | */ | |
651 | mp_resp_bd = mp_req->mp_resp_bd; | |
652 | addr = mp_req->resp_buf_dma; | |
653 | mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; | |
654 | mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); | |
be1fefc2 | 655 | mp_resp_bd->buf_len = CNIC_PAGE_SIZE; |
853e2bd2 BG |
656 | mp_resp_bd->flags = 0; |
657 | ||
658 | return SUCCESS; | |
659 | } | |
660 | ||
661 | static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) | |
662 | { | |
663 | struct fc_lport *lport; | |
33c7da05 JL |
664 | struct fc_rport *rport; |
665 | struct fc_rport_libfc_priv *rp; | |
853e2bd2 | 666 | struct fcoe_port *port; |
aea71a02 | 667 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
668 | struct bnx2fc_rport *tgt; |
669 | struct bnx2fc_cmd *io_req; | |
670 | struct bnx2fc_mp_req *tm_req; | |
671 | struct fcoe_task_ctx_entry *task; | |
672 | struct fcoe_task_ctx_entry *task_page; | |
673 | struct Scsi_Host *host = sc_cmd->device->host; | |
674 | struct fc_frame_header *fc_hdr; | |
675 | struct fcp_cmnd *fcp_cmnd; | |
676 | int task_idx, index; | |
677 | int rc = SUCCESS; | |
678 | u16 xid; | |
679 | u32 sid, did; | |
680 | unsigned long start = jiffies; | |
681 | ||
682 | lport = shost_priv(host); | |
33c7da05 | 683 | rport = starget_to_rport(scsi_target(sc_cmd->device)); |
853e2bd2 | 684 | port = lport_priv(lport); |
aea71a02 | 685 | interface = port->priv; |
853e2bd2 BG |
686 | |
687 | if (rport == NULL) { | |
b2a554ff | 688 | printk(KERN_ERR PFX "device_reset: rport is NULL\n"); |
853e2bd2 BG |
689 | rc = FAILED; |
690 | goto tmf_err; | |
691 | } | |
33c7da05 | 692 | rp = rport->dd_data; |
853e2bd2 BG |
693 | |
694 | rc = fc_block_scsi_eh(sc_cmd); | |
695 | if (rc) | |
696 | return rc; | |
697 | ||
698 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
699 | printk(KERN_ERR PFX "device_reset: link is not ready\n"); | |
700 | rc = FAILED; | |
701 | goto tmf_err; | |
702 | } | |
703 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
704 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
705 | ||
706 | if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { | |
707 | printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); | |
708 | rc = FAILED; | |
709 | goto tmf_err; | |
710 | } | |
711 | retry_tmf: | |
712 | io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); | |
713 | if (!io_req) { | |
714 | if (time_after(jiffies, start + HZ)) { | |
715 | printk(KERN_ERR PFX "tmf: Failed TMF"); | |
716 | rc = FAILED; | |
717 | goto tmf_err; | |
718 | } | |
719 | msleep(20); | |
720 | goto retry_tmf; | |
721 | } | |
722 | /* Initialize rest of io_req fields */ | |
723 | io_req->sc_cmd = sc_cmd; | |
724 | io_req->port = port; | |
725 | io_req->tgt = tgt; | |
726 | ||
727 | tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); | |
728 | ||
729 | rc = bnx2fc_init_mp_req(io_req); | |
730 | if (rc == FAILED) { | |
731 | printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); | |
bd4d5de8 | 732 | spin_lock_bh(&tgt->tgt_lock); |
853e2bd2 | 733 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
bd4d5de8 | 734 | spin_unlock_bh(&tgt->tgt_lock); |
853e2bd2 BG |
735 | goto tmf_err; |
736 | } | |
737 | ||
738 | /* Set TM flags */ | |
739 | io_req->io_req_flags = 0; | |
740 | tm_req->tm_flags = tm_flags; | |
741 | ||
742 | /* Fill FCP_CMND */ | |
743 | bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); | |
744 | fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; | |
745 | memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); | |
746 | fcp_cmnd->fc_dl = 0; | |
747 | ||
748 | /* Fill FC header */ | |
749 | fc_hdr = &(tm_req->req_fc_hdr); | |
750 | sid = tgt->sid; | |
751 | did = rport->port_id; | |
752 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, | |
753 | FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
754 | FC_FC_SEQ_INIT, 0); | |
755 | /* Obtain exchange id */ | |
756 | xid = io_req->xid; | |
757 | ||
758 | BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); | |
759 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
760 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
761 | ||
762 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
763 | task_page = (struct fcoe_task_ctx_entry *) |
764 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
765 | task = &(task_page[index]); |
766 | bnx2fc_init_mp_task(io_req, task); | |
767 | ||
768 | sc_cmd->SCp.ptr = (char *)io_req; | |
769 | ||
770 | /* Obtain free SQ entry */ | |
771 | spin_lock_bh(&tgt->tgt_lock); | |
772 | bnx2fc_add_2_sq(tgt, xid); | |
773 | ||
774 | /* Enqueue the io_req to active_tm_queue */ | |
775 | io_req->on_tmf_queue = 1; | |
776 | list_add_tail(&io_req->link, &tgt->active_tm_queue); | |
777 | ||
778 | init_completion(&io_req->tm_done); | |
779 | io_req->wait_for_comp = 1; | |
780 | ||
781 | /* Ring doorbell */ | |
782 | bnx2fc_ring_doorbell(tgt); | |
783 | spin_unlock_bh(&tgt->tgt_lock); | |
784 | ||
785 | rc = wait_for_completion_timeout(&io_req->tm_done, | |
10755d3f | 786 | interface->tm_timeout * HZ); |
853e2bd2 BG |
787 | spin_lock_bh(&tgt->tgt_lock); |
788 | ||
789 | io_req->wait_for_comp = 0; | |
92886c9c | 790 | if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { |
853e2bd2 | 791 | set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); |
92886c9c BPG |
792 | if (io_req->on_tmf_queue) { |
793 | list_del_init(&io_req->link); | |
794 | io_req->on_tmf_queue = 0; | |
795 | } | |
796 | io_req->wait_for_comp = 1; | |
797 | bnx2fc_initiate_cleanup(io_req); | |
798 | spin_unlock_bh(&tgt->tgt_lock); | |
799 | rc = wait_for_completion_timeout(&io_req->tm_done, | |
800 | BNX2FC_FW_TIMEOUT); | |
801 | spin_lock_bh(&tgt->tgt_lock); | |
802 | io_req->wait_for_comp = 0; | |
803 | if (!rc) | |
804 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
805 | } | |
853e2bd2 BG |
806 | |
807 | spin_unlock_bh(&tgt->tgt_lock); | |
808 | ||
809 | if (!rc) { | |
b2a554ff | 810 | BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); |
853e2bd2 BG |
811 | rc = FAILED; |
812 | } else { | |
b2a554ff | 813 | BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); |
853e2bd2 BG |
814 | rc = SUCCESS; |
815 | } | |
816 | tmf_err: | |
817 | return rc; | |
818 | } | |
819 | ||
820 | int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) | |
821 | { | |
822 | struct fc_lport *lport; | |
823 | struct bnx2fc_rport *tgt = io_req->tgt; | |
824 | struct fc_rport *rport = tgt->rport; | |
825 | struct fc_rport_priv *rdata = tgt->rdata; | |
aea71a02 | 826 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
827 | struct fcoe_port *port; |
828 | struct bnx2fc_cmd *abts_io_req; | |
829 | struct fcoe_task_ctx_entry *task; | |
830 | struct fcoe_task_ctx_entry *task_page; | |
831 | struct fc_frame_header *fc_hdr; | |
832 | struct bnx2fc_mp_req *abts_req; | |
833 | int task_idx, index; | |
834 | u32 sid, did; | |
835 | u16 xid; | |
836 | int rc = SUCCESS; | |
837 | u32 r_a_tov = rdata->r_a_tov; | |
838 | ||
839 | /* called with tgt_lock held */ | |
840 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); | |
841 | ||
842 | port = io_req->port; | |
aea71a02 | 843 | interface = port->priv; |
853e2bd2 BG |
844 | lport = port->lport; |
845 | ||
846 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
847 | printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); | |
848 | rc = FAILED; | |
849 | goto abts_err; | |
850 | } | |
851 | ||
852 | if (rport == NULL) { | |
b2a554ff | 853 | printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); |
853e2bd2 BG |
854 | rc = FAILED; |
855 | goto abts_err; | |
856 | } | |
857 | ||
858 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
859 | printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); | |
860 | rc = FAILED; | |
861 | goto abts_err; | |
862 | } | |
863 | ||
864 | abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); | |
865 | if (!abts_io_req) { | |
866 | printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); | |
867 | rc = FAILED; | |
868 | goto abts_err; | |
869 | } | |
870 | ||
871 | /* Initialize rest of io_req fields */ | |
872 | abts_io_req->sc_cmd = NULL; | |
873 | abts_io_req->port = port; | |
874 | abts_io_req->tgt = tgt; | |
875 | abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ | |
876 | ||
877 | abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); | |
878 | memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); | |
879 | ||
880 | /* Fill FC header */ | |
881 | fc_hdr = &(abts_req->req_fc_hdr); | |
882 | ||
883 | /* Obtain oxid and rxid for the original exchange to be aborted */ | |
884 | fc_hdr->fh_ox_id = htons(io_req->xid); | |
619c5cb6 | 885 | fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); |
853e2bd2 BG |
886 | |
887 | sid = tgt->sid; | |
888 | did = rport->port_id; | |
889 | ||
890 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, | |
891 | FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | | |
892 | FC_FC_SEQ_INIT, 0); | |
893 | ||
894 | xid = abts_io_req->xid; | |
895 | BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); | |
896 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
897 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
898 | ||
899 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
900 | task_page = (struct fcoe_task_ctx_entry *) |
901 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
902 | task = &(task_page[index]); |
903 | bnx2fc_init_mp_task(abts_io_req, task); | |
904 | ||
905 | /* | |
906 | * ABTS task is a temporary task that will be cleaned up | |
907 | * irrespective of ABTS response. We need to start the timer | |
908 | * for the original exchange, as the CQE is posted for the original | |
909 | * IO request. | |
910 | * | |
911 | * Timer for ABTS is started only when it is originated by a | |
912 | * TM request. For the ABTS issued as part of ULP timeout, | |
913 | * scsi-ml maintains the timers. | |
914 | */ | |
915 | ||
916 | /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ | |
917 | bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); | |
918 | ||
919 | /* Obtain free SQ entry */ | |
920 | bnx2fc_add_2_sq(tgt, xid); | |
921 | ||
922 | /* Ring doorbell */ | |
923 | bnx2fc_ring_doorbell(tgt); | |
924 | ||
925 | abts_err: | |
926 | return rc; | |
927 | } | |
928 | ||
6c5a7ce4 BPG |
929 | int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, |
930 | enum fc_rctl r_ctl) | |
931 | { | |
932 | struct fc_lport *lport; | |
933 | struct bnx2fc_rport *tgt = orig_io_req->tgt; | |
934 | struct bnx2fc_interface *interface; | |
935 | struct fcoe_port *port; | |
936 | struct bnx2fc_cmd *seq_clnp_req; | |
937 | struct fcoe_task_ctx_entry *task; | |
938 | struct fcoe_task_ctx_entry *task_page; | |
939 | struct bnx2fc_els_cb_arg *cb_arg = NULL; | |
940 | int task_idx, index; | |
941 | u16 xid; | |
942 | int rc = 0; | |
943 | ||
944 | BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", | |
945 | orig_io_req->xid); | |
946 | kref_get(&orig_io_req->refcount); | |
947 | ||
948 | port = orig_io_req->port; | |
949 | interface = port->priv; | |
950 | lport = port->lport; | |
951 | ||
952 | cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); | |
953 | if (!cb_arg) { | |
954 | printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); | |
955 | rc = -ENOMEM; | |
956 | goto cleanup_err; | |
957 | } | |
958 | ||
959 | seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); | |
960 | if (!seq_clnp_req) { | |
961 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); | |
962 | rc = -ENOMEM; | |
963 | kfree(cb_arg); | |
964 | goto cleanup_err; | |
965 | } | |
966 | /* Initialize rest of io_req fields */ | |
967 | seq_clnp_req->sc_cmd = NULL; | |
968 | seq_clnp_req->port = port; | |
969 | seq_clnp_req->tgt = tgt; | |
970 | seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ | |
971 | ||
972 | xid = seq_clnp_req->xid; | |
973 | ||
974 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
975 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
976 | ||
977 | /* Initialize task context for this IO request */ | |
978 | task_page = (struct fcoe_task_ctx_entry *) | |
979 | interface->hba->task_ctx[task_idx]; | |
980 | task = &(task_page[index]); | |
981 | cb_arg->aborted_io_req = orig_io_req; | |
982 | cb_arg->io_req = seq_clnp_req; | |
983 | cb_arg->r_ctl = r_ctl; | |
984 | cb_arg->offset = offset; | |
985 | seq_clnp_req->cb_arg = cb_arg; | |
986 | ||
987 | printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); | |
988 | bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); | |
989 | ||
990 | /* Obtain free SQ entry */ | |
991 | bnx2fc_add_2_sq(tgt, xid); | |
992 | ||
993 | /* Ring doorbell */ | |
994 | bnx2fc_ring_doorbell(tgt); | |
995 | cleanup_err: | |
996 | return rc; | |
997 | } | |
998 | ||
853e2bd2 BG |
999 | int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) |
1000 | { | |
1001 | struct fc_lport *lport; | |
1002 | struct bnx2fc_rport *tgt = io_req->tgt; | |
aea71a02 | 1003 | struct bnx2fc_interface *interface; |
853e2bd2 BG |
1004 | struct fcoe_port *port; |
1005 | struct bnx2fc_cmd *cleanup_io_req; | |
1006 | struct fcoe_task_ctx_entry *task; | |
1007 | struct fcoe_task_ctx_entry *task_page; | |
1008 | int task_idx, index; | |
1009 | u16 xid, orig_xid; | |
1010 | int rc = 0; | |
1011 | ||
1012 | /* ASSUMPTION: called with tgt_lock held */ | |
1013 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); | |
1014 | ||
1015 | port = io_req->port; | |
aea71a02 | 1016 | interface = port->priv; |
853e2bd2 BG |
1017 | lport = port->lport; |
1018 | ||
1019 | cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); | |
1020 | if (!cleanup_io_req) { | |
1021 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); | |
1022 | rc = -1; | |
1023 | goto cleanup_err; | |
1024 | } | |
1025 | ||
1026 | /* Initialize rest of io_req fields */ | |
1027 | cleanup_io_req->sc_cmd = NULL; | |
1028 | cleanup_io_req->port = port; | |
1029 | cleanup_io_req->tgt = tgt; | |
1030 | cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ | |
1031 | ||
1032 | xid = cleanup_io_req->xid; | |
1033 | ||
1034 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; | |
1035 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
1036 | ||
1037 | /* Initialize task context for this IO request */ | |
aea71a02 BPG |
1038 | task_page = (struct fcoe_task_ctx_entry *) |
1039 | interface->hba->task_ctx[task_idx]; | |
853e2bd2 BG |
1040 | task = &(task_page[index]); |
1041 | orig_xid = io_req->xid; | |
1042 | ||
1043 | BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); | |
1044 | ||
1045 | bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); | |
1046 | ||
1047 | /* Obtain free SQ entry */ | |
1048 | bnx2fc_add_2_sq(tgt, xid); | |
1049 | ||
1050 | /* Ring doorbell */ | |
1051 | bnx2fc_ring_doorbell(tgt); | |
1052 | ||
1053 | cleanup_err: | |
1054 | return rc; | |
1055 | } | |
1056 | ||
1057 | /** | |
1058 | * bnx2fc_eh_target_reset: Reset a target | |
1059 | * | |
1060 | * @sc_cmd: SCSI command | |
1061 | * | |
1062 | * Set from SCSI host template to send task mgmt command to the target | |
1063 | * and wait for the response | |
1064 | */ | |
1065 | int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) | |
1066 | { | |
1067 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); | |
1068 | } | |
1069 | ||
1070 | /** | |
1071 | * bnx2fc_eh_device_reset - Reset a single LUN | |
1072 | * | |
1073 | * @sc_cmd: SCSI command | |
1074 | * | |
1075 | * Set from SCSI host template to send task mgmt command to the target | |
1076 | * and wait for the response | |
1077 | */ | |
1078 | int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) | |
1079 | { | |
1080 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); | |
1081 | } | |
1082 | ||
3f7d67da | 1083 | static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req) |
c1bb4f33 BPG |
1084 | { |
1085 | struct bnx2fc_rport *tgt = io_req->tgt; | |
c1bb4f33 | 1086 | int rc = SUCCESS; |
faae19be | 1087 | unsigned int time_left; |
c1bb4f33 | 1088 | |
c1bb4f33 BPG |
1089 | io_req->wait_for_comp = 1; |
1090 | bnx2fc_initiate_cleanup(io_req); | |
1091 | ||
1092 | spin_unlock_bh(&tgt->tgt_lock); | |
1093 | ||
faae19be CD |
1094 | /* |
1095 | * Can't wait forever on cleanup response lest we let the SCSI error | |
1096 | * handler wait forever | |
1097 | */ | |
1098 | time_left = wait_for_completion_timeout(&io_req->tm_done, | |
1099 | BNX2FC_FW_TIMEOUT); | |
c1bb4f33 | 1100 | io_req->wait_for_comp = 0; |
faae19be CD |
1101 | if (!time_left) |
1102 | BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n", | |
1103 | __func__); | |
1104 | ||
c1bb4f33 | 1105 | /* |
faae19be CD |
1106 | * Release reference held by SCSI command the cleanup completion |
1107 | * hits the BNX2FC_CLEANUP case in bnx2fc_process_cq_compl() and | |
1108 | * thus the SCSI command is not returnedi by bnx2fc_scsi_done(). | |
c1bb4f33 | 1109 | */ |
50a87414 CD |
1110 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
1111 | ||
c1bb4f33 BPG |
1112 | spin_lock_bh(&tgt->tgt_lock); |
1113 | return rc; | |
1114 | } | |
faae19be | 1115 | |
853e2bd2 BG |
1116 | /** |
1117 | * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding | |
1118 | * SCSI command | |
1119 | * | |
1120 | * @sc_cmd: SCSI_ML command pointer | |
1121 | * | |
1122 | * SCSI abort request handler | |
1123 | */ | |
1124 | int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) | |
1125 | { | |
1126 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1127 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1128 | struct bnx2fc_cmd *io_req; | |
1129 | struct fc_lport *lport; | |
1130 | struct bnx2fc_rport *tgt; | |
617757de | 1131 | int rc; |
faae19be | 1132 | unsigned int time_left; |
853e2bd2 BG |
1133 | |
1134 | rc = fc_block_scsi_eh(sc_cmd); | |
1135 | if (rc) | |
1136 | return rc; | |
1137 | ||
1138 | lport = shost_priv(sc_cmd->device->host); | |
1139 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
b2a554ff | 1140 | printk(KERN_ERR PFX "eh_abort: link not ready\n"); |
617757de | 1141 | return FAILED; |
853e2bd2 BG |
1142 | } |
1143 | ||
1144 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1145 | ||
1146 | BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); | |
1147 | ||
1148 | spin_lock_bh(&tgt->tgt_lock); | |
1149 | io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; | |
1150 | if (!io_req) { | |
1151 | /* Command might have just completed */ | |
1152 | printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); | |
1153 | spin_unlock_bh(&tgt->tgt_lock); | |
1154 | return SUCCESS; | |
1155 | } | |
1156 | BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", | |
2c935bc5 | 1157 | kref_read(&io_req->refcount)); |
853e2bd2 BG |
1158 | |
1159 | /* Hold IO request across abort processing */ | |
1160 | kref_get(&io_req->refcount); | |
1161 | ||
1162 | BUG_ON(tgt != io_req->tgt); | |
1163 | ||
1164 | /* Remove the io_req from the active_q. */ | |
1165 | /* | |
1166 | * Task Mgmt functions (LUN RESET & TGT RESET) will not | |
1167 | * issue an ABTS on this particular IO req, as the | |
1168 | * io_req is no longer in the active_q. | |
1169 | */ | |
1170 | if (tgt->flush_in_prog) { | |
b2a554ff | 1171 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 BG |
1172 | "flush in progress\n", io_req->xid); |
1173 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1174 | spin_unlock_bh(&tgt->tgt_lock); | |
1175 | return SUCCESS; | |
1176 | } | |
1177 | ||
1178 | if (io_req->on_active_queue == 0) { | |
b2a554ff | 1179 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 BG |
1180 | "not on active_q\n", io_req->xid); |
1181 | /* | |
5c63daf6 CD |
1182 | * The IO is still with the FW. |
1183 | * Return failure and let SCSI-ml retry eh_abort. | |
853e2bd2 | 1184 | */ |
853e2bd2 | 1185 | spin_unlock_bh(&tgt->tgt_lock); |
5c63daf6 | 1186 | return FAILED; |
853e2bd2 BG |
1187 | } |
1188 | ||
1189 | /* | |
1190 | * Only eh_abort processing will remove the IO from | |
1191 | * active_cmd_q before processing the request. this is | |
1192 | * done to avoid race conditions between IOs aborted | |
1193 | * as part of task management completion and eh_abort | |
1194 | * processing | |
1195 | */ | |
1196 | list_del_init(&io_req->link); | |
1197 | io_req->on_active_queue = 0; | |
1198 | /* Move IO req to retire queue */ | |
1199 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1200 | ||
1201 | init_completion(&io_req->tm_done); | |
853e2bd2 | 1202 | |
c1bb4f33 | 1203 | if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { |
b2a554ff | 1204 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
853e2bd2 | 1205 | "already in abts processing\n", io_req->xid); |
99cc600c BPG |
1206 | if (cancel_delayed_work(&io_req->timeout_work)) |
1207 | kref_put(&io_req->refcount, | |
1208 | bnx2fc_cmd_release); /* drop timer hold */ | |
faae19be CD |
1209 | /* |
1210 | * We don't want to hold off the upper layer timer so simply | |
1211 | * cleanup the command and return that I/O was successfully | |
1212 | * aborted. | |
1213 | */ | |
50a87414 | 1214 | rc = bnx2fc_abts_cleanup(io_req); |
21837896 EW |
1215 | /* This only occurs when an task abort was requested while ABTS |
1216 | is in progress. Setting the IO_CLEANUP flag will skip the | |
1217 | RRQ process in the case when the fw generated SCSI_CMD cmpl | |
1218 | was a result from the ABTS request rather than the CLEANUP | |
1219 | request */ | |
1220 | set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); | |
faae19be | 1221 | goto done; |
c1bb4f33 | 1222 | } |
99cc600c | 1223 | |
c1bb4f33 BPG |
1224 | /* Cancel the current timer running on this io_req */ |
1225 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1226 | kref_put(&io_req->refcount, | |
1227 | bnx2fc_cmd_release); /* drop timer hold */ | |
1228 | set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); | |
1229 | io_req->wait_for_comp = 1; | |
1230 | rc = bnx2fc_initiate_abts(io_req); | |
1231 | if (rc == FAILED) { | |
1232 | bnx2fc_initiate_cleanup(io_req); | |
99cc600c | 1233 | spin_unlock_bh(&tgt->tgt_lock); |
99cc600c | 1234 | wait_for_completion(&io_req->tm_done); |
99cc600c BPG |
1235 | spin_lock_bh(&tgt->tgt_lock); |
1236 | io_req->wait_for_comp = 0; | |
c1bb4f33 | 1237 | goto done; |
853e2bd2 BG |
1238 | } |
1239 | spin_unlock_bh(&tgt->tgt_lock); | |
1240 | ||
faae19be CD |
1241 | /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */ |
1242 | time_left = wait_for_completion_timeout(&io_req->tm_done, | |
1243 | (2 * rp->r_a_tov + 1) * HZ); | |
1244 | if (time_left) | |
1245 | BNX2FC_IO_DBG(io_req, "Timed out in eh_abort waiting for tm_done"); | |
853e2bd2 BG |
1246 | |
1247 | spin_lock_bh(&tgt->tgt_lock); | |
1248 | io_req->wait_for_comp = 0; | |
5d78f175 BPG |
1249 | if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { |
1250 | BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); | |
1251 | rc = SUCCESS; | |
1252 | } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1253 | &io_req->req_flags))) { | |
853e2bd2 BG |
1254 | /* Let the scsi-ml try to recover this command */ |
1255 | printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", | |
1256 | io_req->xid); | |
faae19be CD |
1257 | /* |
1258 | * Cleanup firmware residuals before returning control back | |
1259 | * to SCSI ML. | |
1260 | */ | |
50a87414 | 1261 | rc = bnx2fc_abts_cleanup(io_req); |
faae19be | 1262 | goto done; |
853e2bd2 BG |
1263 | } else { |
1264 | /* | |
1265 | * We come here even when there was a race condition | |
1266 | * between timeout and abts completion, and abts | |
1267 | * completion happens just in time. | |
1268 | */ | |
1269 | BNX2FC_IO_DBG(io_req, "abort succeeded\n"); | |
1270 | rc = SUCCESS; | |
1271 | bnx2fc_scsi_done(io_req, DID_ABORT); | |
1272 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1273 | } | |
c1bb4f33 | 1274 | done: |
853e2bd2 BG |
1275 | /* release the reference taken in eh_abort */ |
1276 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1277 | spin_unlock_bh(&tgt->tgt_lock); | |
1278 | return rc; | |
1279 | } | |
1280 | ||
6c5a7ce4 BPG |
1281 | void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, |
1282 | struct fcoe_task_ctx_entry *task, | |
1283 | u8 rx_state) | |
1284 | { | |
1285 | struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; | |
1286 | struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; | |
1287 | u32 offset = cb_arg->offset; | |
1288 | enum fc_rctl r_ctl = cb_arg->r_ctl; | |
1289 | int rc = 0; | |
1290 | struct bnx2fc_rport *tgt = orig_io_req->tgt; | |
1291 | ||
1292 | BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" | |
1293 | "cmd_type = %d\n", | |
1294 | seq_clnp_req->xid, seq_clnp_req->cmd_type); | |
1295 | ||
1296 | if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { | |
1297 | printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", | |
1298 | seq_clnp_req->xid); | |
1299 | goto free_cb_arg; | |
1300 | } | |
6c5a7ce4 BPG |
1301 | |
1302 | spin_unlock_bh(&tgt->tgt_lock); | |
1303 | rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); | |
1304 | spin_lock_bh(&tgt->tgt_lock); | |
1305 | ||
1306 | if (rc) | |
1307 | printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" | |
1308 | " IO will abort\n"); | |
1309 | seq_clnp_req->cb_arg = NULL; | |
1310 | kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); | |
1311 | free_cb_arg: | |
1312 | kfree(cb_arg); | |
1313 | return; | |
1314 | } | |
1315 | ||
853e2bd2 BG |
1316 | void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, |
1317 | struct fcoe_task_ctx_entry *task, | |
1318 | u8 num_rq) | |
1319 | { | |
1320 | BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " | |
1321 | "refcnt = %d, cmd_type = %d\n", | |
2c935bc5 | 1322 | kref_read(&io_req->refcount), io_req->cmd_type); |
853e2bd2 BG |
1323 | bnx2fc_scsi_done(io_req, DID_ERROR); |
1324 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
99cc600c BPG |
1325 | if (io_req->wait_for_comp) |
1326 | complete(&io_req->tm_done); | |
853e2bd2 BG |
1327 | } |
1328 | ||
1329 | void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, | |
1330 | struct fcoe_task_ctx_entry *task, | |
1331 | u8 num_rq) | |
1332 | { | |
1333 | u32 r_ctl; | |
1334 | u32 r_a_tov = FC_DEF_R_A_TOV; | |
1335 | u8 issue_rrq = 0; | |
1336 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1337 | ||
1338 | BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" | |
1339 | "refcnt = %d, cmd_type = %d\n", | |
1340 | io_req->xid, | |
2c935bc5 | 1341 | kref_read(&io_req->refcount), io_req->cmd_type); |
853e2bd2 BG |
1342 | |
1343 | if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, | |
1344 | &io_req->req_flags)) { | |
1345 | BNX2FC_IO_DBG(io_req, "Timer context finished processing" | |
1346 | " this io\n"); | |
1347 | return; | |
1348 | } | |
1349 | ||
1350 | /* Do not issue RRQ as this IO is already cleanedup */ | |
1351 | if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, | |
1352 | &io_req->req_flags)) | |
1353 | goto io_compl; | |
1354 | ||
1355 | /* | |
1356 | * For ABTS issued due to SCSI eh_abort_handler, timeout | |
1357 | * values are maintained by scsi-ml itself. Cancel timeout | |
1358 | * in case ABTS issued as part of task management function | |
1359 | * or due to FW error. | |
1360 | */ | |
1361 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) | |
1362 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1363 | kref_put(&io_req->refcount, | |
1364 | bnx2fc_cmd_release); /* drop timer hold */ | |
1365 | ||
619c5cb6 | 1366 | r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; |
853e2bd2 BG |
1367 | |
1368 | switch (r_ctl) { | |
1369 | case FC_RCTL_BA_ACC: | |
1370 | /* | |
1371 | * Dont release this cmd yet. It will be relesed | |
1372 | * after we get RRQ response | |
1373 | */ | |
1374 | BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); | |
1375 | issue_rrq = 1; | |
1376 | break; | |
1377 | ||
1378 | case FC_RCTL_BA_RJT: | |
1379 | BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); | |
1380 | break; | |
1381 | default: | |
1382 | printk(KERN_ERR PFX "Unknown ABTS response\n"); | |
1383 | break; | |
1384 | } | |
1385 | ||
1386 | if (issue_rrq) { | |
1387 | BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); | |
1388 | set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); | |
1389 | } | |
1390 | set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); | |
1391 | bnx2fc_cmd_timer_set(io_req, r_a_tov); | |
1392 | ||
1393 | io_compl: | |
1394 | if (io_req->wait_for_comp) { | |
1395 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1396 | &io_req->req_flags)) | |
1397 | complete(&io_req->tm_done); | |
1398 | } else { | |
1399 | /* | |
1400 | * We end up here when ABTS is issued as | |
1401 | * in asynchronous context, i.e., as part | |
1402 | * of task management completion, or | |
1403 | * when FW error is received or when the | |
1404 | * ABTS is issued when the IO is timed | |
1405 | * out. | |
1406 | */ | |
1407 | ||
1408 | if (io_req->on_active_queue) { | |
1409 | list_del_init(&io_req->link); | |
1410 | io_req->on_active_queue = 0; | |
1411 | /* Move IO req to retire queue */ | |
1412 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1413 | } | |
1414 | bnx2fc_scsi_done(io_req, DID_ERROR); | |
1415 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1420 | { | |
1421 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1422 | struct bnx2fc_rport *tgt = io_req->tgt; | |
d71fb3bd | 1423 | struct bnx2fc_cmd *cmd, *tmp; |
9cb78c16 HR |
1424 | u64 tm_lun = sc_cmd->device->lun; |
1425 | u64 lun; | |
853e2bd2 | 1426 | int rc = 0; |
853e2bd2 BG |
1427 | |
1428 | /* called with tgt_lock held */ | |
1429 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); | |
1430 | /* | |
1431 | * Walk thru the active_ios queue and ABORT the IO | |
1432 | * that matches with the LUN that was reset | |
1433 | */ | |
d71fb3bd | 1434 | list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { |
853e2bd2 | 1435 | BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); |
853e2bd2 BG |
1436 | lun = cmd->sc_cmd->device->lun; |
1437 | if (lun == tm_lun) { | |
1438 | /* Initiate ABTS on this cmd */ | |
1439 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1440 | &cmd->req_flags)) { | |
1441 | /* cancel the IO timeout */ | |
1442 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1443 | kref_put(&io_req->refcount, | |
1444 | bnx2fc_cmd_release); | |
1445 | /* timer hold */ | |
1446 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1447 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1448 | WARN_ON(rc != SUCCESS); |
1449 | } else | |
1450 | printk(KERN_ERR PFX "lun_rst: abts already in" | |
1451 | " progress for this IO 0x%x\n", | |
1452 | cmd->xid); | |
1453 | } | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) | |
1458 | { | |
1459 | struct bnx2fc_rport *tgt = io_req->tgt; | |
d71fb3bd | 1460 | struct bnx2fc_cmd *cmd, *tmp; |
853e2bd2 BG |
1461 | int rc = 0; |
1462 | ||
1463 | /* called with tgt_lock held */ | |
1464 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); | |
1465 | /* | |
1466 | * Walk thru the active_ios queue and ABORT the IO | |
1467 | * that matches with the LUN that was reset | |
1468 | */ | |
d71fb3bd | 1469 | list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { |
853e2bd2 | 1470 | BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); |
853e2bd2 BG |
1471 | /* Initiate ABTS */ |
1472 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, | |
1473 | &cmd->req_flags)) { | |
1474 | /* cancel the IO timeout */ | |
1475 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1476 | kref_put(&io_req->refcount, | |
1477 | bnx2fc_cmd_release); /* timer hold */ | |
1478 | rc = bnx2fc_initiate_abts(cmd); | |
25985edc | 1479 | /* abts shouldn't fail in this context */ |
853e2bd2 BG |
1480 | WARN_ON(rc != SUCCESS); |
1481 | ||
1482 | } else | |
1483 | printk(KERN_ERR PFX "tgt_rst: abts already in progress" | |
1484 | " for this IO 0x%x\n", cmd->xid); | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, | |
1489 | struct fcoe_task_ctx_entry *task, u8 num_rq) | |
1490 | { | |
1491 | struct bnx2fc_mp_req *tm_req; | |
1492 | struct fc_frame_header *fc_hdr; | |
1493 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1494 | u64 *hdr; | |
1495 | u64 *temp_hdr; | |
1496 | void *rsp_buf; | |
1497 | ||
1498 | /* Called with tgt_lock held */ | |
1499 | BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); | |
1500 | ||
1501 | if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) | |
1502 | set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); | |
1503 | else { | |
1504 | /* TM has already timed out and we got | |
1505 | * delayed completion. Ignore completion | |
1506 | * processing. | |
1507 | */ | |
1508 | return; | |
1509 | } | |
1510 | ||
1511 | tm_req = &(io_req->mp_req); | |
1512 | fc_hdr = &(tm_req->resp_fc_hdr); | |
1513 | hdr = (u64 *)fc_hdr; | |
1514 | temp_hdr = (u64 *) | |
619c5cb6 | 1515 | &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; |
853e2bd2 BG |
1516 | hdr[0] = cpu_to_be64(temp_hdr[0]); |
1517 | hdr[1] = cpu_to_be64(temp_hdr[1]); | |
1518 | hdr[2] = cpu_to_be64(temp_hdr[2]); | |
1519 | ||
619c5cb6 VZ |
1520 | tm_req->resp_len = |
1521 | task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; | |
853e2bd2 BG |
1522 | |
1523 | rsp_buf = tm_req->resp_buf; | |
1524 | ||
1525 | if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { | |
1526 | bnx2fc_parse_fcp_rsp(io_req, | |
1527 | (struct fcoe_fcp_rsp_payload *) | |
1528 | rsp_buf, num_rq); | |
1529 | if (io_req->fcp_rsp_code == 0) { | |
1530 | /* TM successful */ | |
1531 | if (tm_req->tm_flags & FCP_TMF_LUN_RESET) | |
1532 | bnx2fc_lun_reset_cmpl(io_req); | |
1533 | else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) | |
1534 | bnx2fc_tgt_reset_cmpl(io_req); | |
1535 | } | |
1536 | } else { | |
1537 | printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", | |
1538 | fc_hdr->fh_r_ctl); | |
1539 | } | |
1540 | if (!sc_cmd->SCp.ptr) { | |
b2a554ff | 1541 | printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); |
853e2bd2 BG |
1542 | return; |
1543 | } | |
1544 | switch (io_req->fcp_status) { | |
1545 | case FC_GOOD: | |
1546 | if (io_req->cdb_status == 0) { | |
1547 | /* Good IO completion */ | |
1548 | sc_cmd->result = DID_OK << 16; | |
1549 | } else { | |
1550 | /* Transport status is good, SCSI status not good */ | |
1551 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1552 | } | |
1553 | if (io_req->fcp_resid) | |
1554 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1555 | break; | |
1556 | ||
1557 | default: | |
1558 | BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", | |
1559 | io_req->fcp_status); | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | sc_cmd = io_req->sc_cmd; | |
1564 | io_req->sc_cmd = NULL; | |
1565 | ||
1566 | /* check if the io_req exists in tgt's tmf_q */ | |
1567 | if (io_req->on_tmf_queue) { | |
1568 | ||
1569 | list_del_init(&io_req->link); | |
1570 | io_req->on_tmf_queue = 0; | |
1571 | } else { | |
1572 | ||
b2a554ff | 1573 | printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); |
853e2bd2 BG |
1574 | return; |
1575 | } | |
1576 | ||
1577 | sc_cmd->SCp.ptr = NULL; | |
1578 | sc_cmd->scsi_done(sc_cmd); | |
1579 | ||
1580 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1581 | if (io_req->wait_for_comp) { | |
1582 | BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); | |
1583 | complete(&io_req->tm_done); | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, | |
1588 | int bd_index) | |
1589 | { | |
1590 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1591 | int frag_size, sg_frags; | |
1592 | ||
1593 | sg_frags = 0; | |
1594 | while (sg_len) { | |
1595 | if (sg_len >= BNX2FC_BD_SPLIT_SZ) | |
1596 | frag_size = BNX2FC_BD_SPLIT_SZ; | |
1597 | else | |
1598 | frag_size = sg_len; | |
1599 | bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; | |
1600 | bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; | |
1601 | bd[bd_index + sg_frags].buf_len = (u16)frag_size; | |
1602 | bd[bd_index + sg_frags].flags = 0; | |
1603 | ||
1604 | addr += (u64) frag_size; | |
1605 | sg_frags++; | |
1606 | sg_len -= frag_size; | |
1607 | } | |
1608 | return sg_frags; | |
1609 | ||
1610 | } | |
1611 | ||
1612 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) | |
1613 | { | |
3ce41ea1 BPG |
1614 | struct bnx2fc_interface *interface = io_req->port->priv; |
1615 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 BG |
1616 | struct scsi_cmnd *sc = io_req->sc_cmd; |
1617 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1618 | struct scatterlist *sg; | |
1619 | int byte_count = 0; | |
1620 | int sg_count = 0; | |
1621 | int bd_count = 0; | |
1622 | int sg_frags; | |
1623 | unsigned int sg_len; | |
1624 | u64 addr; | |
1625 | int i; | |
1626 | ||
5565461e CD |
1627 | /* |
1628 | * Use dma_map_sg directly to ensure we're using the correct | |
1629 | * dev struct off of pcidev. | |
1630 | */ | |
3ce41ea1 BPG |
1631 | sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), |
1632 | scsi_sg_count(sc), sc->sc_data_direction); | |
853e2bd2 BG |
1633 | scsi_for_each_sg(sc, sg, sg_count, i) { |
1634 | sg_len = sg_dma_len(sg); | |
1635 | addr = sg_dma_address(sg); | |
1636 | if (sg_len > BNX2FC_MAX_BD_LEN) { | |
1637 | sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, | |
1638 | bd_count); | |
1639 | } else { | |
1640 | ||
1641 | sg_frags = 1; | |
1642 | bd[bd_count].buf_addr_lo = addr & 0xffffffff; | |
1643 | bd[bd_count].buf_addr_hi = addr >> 32; | |
1644 | bd[bd_count].buf_len = (u16)sg_len; | |
1645 | bd[bd_count].flags = 0; | |
1646 | } | |
1647 | bd_count += sg_frags; | |
1648 | byte_count += sg_len; | |
1649 | } | |
1650 | if (byte_count != scsi_bufflen(sc)) | |
1651 | printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " | |
1652 | "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), | |
1653 | io_req->xid); | |
1654 | return bd_count; | |
1655 | } | |
1656 | ||
822f2903 | 1657 | static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) |
853e2bd2 BG |
1658 | { |
1659 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1660 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; | |
1661 | int bd_count; | |
1662 | ||
822f2903 | 1663 | if (scsi_sg_count(sc)) { |
853e2bd2 | 1664 | bd_count = bnx2fc_map_sg(io_req); |
822f2903 BPG |
1665 | if (bd_count == 0) |
1666 | return -ENOMEM; | |
1667 | } else { | |
853e2bd2 BG |
1668 | bd_count = 0; |
1669 | bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; | |
1670 | bd[0].buf_len = bd[0].flags = 0; | |
1671 | } | |
1672 | io_req->bd_tbl->bd_valid = bd_count; | |
822f2903 BPG |
1673 | |
1674 | return 0; | |
853e2bd2 BG |
1675 | } |
1676 | ||
1677 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) | |
1678 | { | |
1679 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
5565461e CD |
1680 | struct bnx2fc_interface *interface = io_req->port->priv; |
1681 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 | 1682 | |
5565461e CD |
1683 | /* |
1684 | * Use dma_unmap_sg directly to ensure we're using the correct | |
1685 | * dev struct off of pcidev. | |
1686 | */ | |
1687 | if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { | |
1688 | dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), | |
1689 | scsi_sg_count(sc), sc->sc_data_direction); | |
853e2bd2 BG |
1690 | io_req->bd_tbl->bd_valid = 0; |
1691 | } | |
1692 | } | |
1693 | ||
1694 | void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, | |
1695 | struct fcp_cmnd *fcp_cmnd) | |
1696 | { | |
1697 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
853e2bd2 BG |
1698 | |
1699 | memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); | |
1700 | ||
e35fa8c2 | 1701 | int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); |
853e2bd2 BG |
1702 | |
1703 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); | |
1704 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); | |
1705 | ||
1706 | fcp_cmnd->fc_cmdref = 0; | |
1707 | fcp_cmnd->fc_pri_ta = 0; | |
1708 | fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; | |
1709 | fcp_cmnd->fc_flags = io_req->io_req_flags; | |
ea6bb33e | 1710 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; |
853e2bd2 BG |
1711 | } |
1712 | ||
1713 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, | |
1714 | struct fcoe_fcp_rsp_payload *fcp_rsp, | |
1715 | u8 num_rq) | |
1716 | { | |
1717 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1718 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1719 | u8 rsp_flags = fcp_rsp->fcp_flags.flags; | |
1720 | u32 rq_buff_len = 0; | |
1721 | int i; | |
1722 | unsigned char *rq_data; | |
1723 | unsigned char *dummy; | |
1724 | int fcp_sns_len = 0; | |
1725 | int fcp_rsp_len = 0; | |
1726 | ||
1727 | io_req->fcp_status = FC_GOOD; | |
adcf7dfb CD |
1728 | io_req->fcp_resid = 0; |
1729 | if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | | |
1730 | FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) | |
1731 | io_req->fcp_resid = fcp_rsp->fcp_resid; | |
853e2bd2 BG |
1732 | |
1733 | io_req->scsi_comp_flags = rsp_flags; | |
1734 | CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = | |
1735 | fcp_rsp->scsi_status_code; | |
1736 | ||
1737 | /* Fetch fcp_rsp_info and fcp_sns_info if available */ | |
1738 | if (num_rq) { | |
1739 | ||
1740 | /* | |
1741 | * We do not anticipate num_rq >1, as the linux defined | |
1742 | * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO | |
1743 | * 256 bytes of single rq buffer is good enough to hold this. | |
1744 | */ | |
1745 | ||
1746 | if (rsp_flags & | |
1747 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { | |
1748 | fcp_rsp_len = rq_buff_len | |
1749 | = fcp_rsp->fcp_rsp_len; | |
1750 | } | |
1751 | ||
1752 | if (rsp_flags & | |
1753 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { | |
1754 | fcp_sns_len = fcp_rsp->fcp_sns_len; | |
1755 | rq_buff_len += fcp_rsp->fcp_sns_len; | |
1756 | } | |
1757 | ||
1758 | io_req->fcp_rsp_len = fcp_rsp_len; | |
1759 | io_req->fcp_sns_len = fcp_sns_len; | |
1760 | ||
1761 | if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { | |
1762 | /* Invalid sense sense length. */ | |
b2a554ff | 1763 | printk(KERN_ERR PFX "invalid sns length %d\n", |
853e2bd2 BG |
1764 | rq_buff_len); |
1765 | /* reset rq_buff_len */ | |
1766 | rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; | |
1767 | } | |
1768 | ||
1769 | rq_data = bnx2fc_get_next_rqe(tgt, 1); | |
1770 | ||
1771 | if (num_rq > 1) { | |
1772 | /* We do not need extra sense data */ | |
1773 | for (i = 1; i < num_rq; i++) | |
1774 | dummy = bnx2fc_get_next_rqe(tgt, 1); | |
1775 | } | |
1776 | ||
1777 | /* fetch fcp_rsp_code */ | |
1778 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { | |
1779 | /* Only for task management function */ | |
1780 | io_req->fcp_rsp_code = rq_data[3]; | |
8a30a3c7 | 1781 | BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n", |
853e2bd2 BG |
1782 | io_req->fcp_rsp_code); |
1783 | } | |
1784 | ||
1785 | /* fetch sense data */ | |
1786 | rq_data += fcp_rsp_len; | |
1787 | ||
1788 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { | |
1789 | printk(KERN_ERR PFX "Truncating sense buffer\n"); | |
1790 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; | |
1791 | } | |
1792 | ||
16da05b1 | 1793 | memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
853e2bd2 BG |
1794 | if (fcp_sns_len) |
1795 | memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); | |
1796 | ||
1797 | /* return RQ entries */ | |
1798 | for (i = 0; i < num_rq; i++) | |
1799 | bnx2fc_return_rqe(tgt, 1); | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | /** | |
1804 | * bnx2fc_queuecommand - Queuecommand function of the scsi template | |
1805 | * | |
1806 | * @host: The Scsi_Host the command was issued to | |
1807 | * @sc_cmd: struct scsi_cmnd to be executed | |
1808 | * | |
1809 | * This is the IO strategy routine, called by SCSI-ML | |
1810 | **/ | |
1811 | int bnx2fc_queuecommand(struct Scsi_Host *host, | |
1812 | struct scsi_cmnd *sc_cmd) | |
1813 | { | |
1814 | struct fc_lport *lport = shost_priv(host); | |
1815 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
1816 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
1817 | struct bnx2fc_rport *tgt; | |
1818 | struct bnx2fc_cmd *io_req; | |
1819 | int rc = 0; | |
1820 | int rval; | |
1821 | ||
1822 | rval = fc_remote_port_chkready(rport); | |
1823 | if (rval) { | |
1824 | sc_cmd->result = rval; | |
1825 | sc_cmd->scsi_done(sc_cmd); | |
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { | |
1830 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1831 | goto exit_qcmd; | |
1832 | } | |
1833 | ||
1834 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
1835 | tgt = (struct bnx2fc_rport *)&rp[1]; | |
1836 | ||
1837 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
1838 | /* | |
1839 | * Session is not offloaded yet. Let SCSI-ml retry | |
1840 | * the command. | |
1841 | */ | |
1842 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
1843 | goto exit_qcmd; | |
1844 | } | |
245a5754 EW |
1845 | if (tgt->retry_delay_timestamp) { |
1846 | if (time_after(jiffies, tgt->retry_delay_timestamp)) { | |
1847 | tgt->retry_delay_timestamp = 0; | |
1848 | } else { | |
1849 | /* If retry_delay timer is active, flow off the ML */ | |
1850 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
1851 | goto exit_qcmd; | |
1852 | } | |
1853 | } | |
dc6311dd ML |
1854 | |
1855 | spin_lock_bh(&tgt->tgt_lock); | |
1856 | ||
853e2bd2 BG |
1857 | io_req = bnx2fc_cmd_alloc(tgt); |
1858 | if (!io_req) { | |
1859 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
dc6311dd | 1860 | goto exit_qcmd_tgtlock; |
853e2bd2 BG |
1861 | } |
1862 | io_req->sc_cmd = sc_cmd; | |
1863 | ||
1864 | if (bnx2fc_post_io_req(tgt, io_req)) { | |
1865 | printk(KERN_ERR PFX "Unable to post io_req\n"); | |
1866 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
dc6311dd | 1867 | goto exit_qcmd_tgtlock; |
853e2bd2 | 1868 | } |
dc6311dd ML |
1869 | |
1870 | exit_qcmd_tgtlock: | |
1871 | spin_unlock_bh(&tgt->tgt_lock); | |
853e2bd2 BG |
1872 | exit_qcmd: |
1873 | return rc; | |
1874 | } | |
1875 | ||
1876 | void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, | |
1877 | struct fcoe_task_ctx_entry *task, | |
1878 | u8 num_rq) | |
1879 | { | |
1880 | struct fcoe_fcp_rsp_payload *fcp_rsp; | |
1881 | struct bnx2fc_rport *tgt = io_req->tgt; | |
1882 | struct scsi_cmnd *sc_cmd; | |
1883 | struct Scsi_Host *host; | |
1884 | ||
1885 | ||
1886 | /* scsi_cmd_cmpl is called with tgt lock held */ | |
1887 | ||
1888 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { | |
1889 | /* we will not receive ABTS response for this IO */ | |
1890 | BNX2FC_IO_DBG(io_req, "Timer context finished processing " | |
1891 | "this scsi cmd\n"); | |
ecf7ff49 | 1892 | return; |
853e2bd2 BG |
1893 | } |
1894 | ||
1895 | /* Cancel the timeout_work, as we received IO completion */ | |
1896 | if (cancel_delayed_work(&io_req->timeout_work)) | |
1897 | kref_put(&io_req->refcount, | |
1898 | bnx2fc_cmd_release); /* drop timer hold */ | |
1899 | ||
1900 | sc_cmd = io_req->sc_cmd; | |
1901 | if (sc_cmd == NULL) { | |
1902 | printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); | |
1903 | return; | |
1904 | } | |
1905 | ||
1906 | /* Fetch fcp_rsp from task context and perform cmd completion */ | |
1907 | fcp_rsp = (struct fcoe_fcp_rsp_payload *) | |
619c5cb6 | 1908 | &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); |
853e2bd2 BG |
1909 | |
1910 | /* parse fcp_rsp and obtain sense data from RQ if available */ | |
1911 | bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); | |
1912 | ||
1913 | host = sc_cmd->device->host; | |
1914 | if (!sc_cmd->SCp.ptr) { | |
1915 | printk(KERN_ERR PFX "SCp.ptr is NULL\n"); | |
1916 | return; | |
1917 | } | |
853e2bd2 BG |
1918 | |
1919 | if (io_req->on_active_queue) { | |
1920 | list_del_init(&io_req->link); | |
1921 | io_req->on_active_queue = 0; | |
1922 | /* Move IO req to retire queue */ | |
1923 | list_add_tail(&io_req->link, &tgt->io_retire_queue); | |
1924 | } else { | |
1925 | /* This should not happen, but could have been pulled | |
1926 | * by bnx2fc_flush_active_ios(), or during a race | |
1927 | * between command abort and (late) completion. | |
1928 | */ | |
1929 | BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); | |
1930 | if (io_req->wait_for_comp) | |
1931 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, | |
1932 | &io_req->req_flags)) | |
1933 | complete(&io_req->tm_done); | |
1934 | } | |
1935 | ||
1936 | bnx2fc_unmap_sg_list(io_req); | |
b5a95fe7 | 1937 | io_req->sc_cmd = NULL; |
853e2bd2 BG |
1938 | |
1939 | switch (io_req->fcp_status) { | |
1940 | case FC_GOOD: | |
1941 | if (io_req->cdb_status == 0) { | |
1942 | /* Good IO completion */ | |
1943 | sc_cmd->result = DID_OK << 16; | |
1944 | } else { | |
1945 | /* Transport status is good, SCSI status not good */ | |
1946 | BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" | |
1947 | " fcp_resid = 0x%x\n", | |
1948 | io_req->cdb_status, io_req->fcp_resid); | |
1949 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
245a5754 EW |
1950 | |
1951 | if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || | |
1952 | io_req->cdb_status == SAM_STAT_BUSY) { | |
1953 | /* Set the jiffies + retry_delay_timer * 100ms | |
1954 | for the rport/tgt */ | |
1955 | tgt->retry_delay_timestamp = jiffies + | |
1956 | fcp_rsp->retry_delay_timer * HZ / 10; | |
1957 | } | |
1958 | ||
853e2bd2 BG |
1959 | } |
1960 | if (io_req->fcp_resid) | |
1961 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
1962 | break; | |
1963 | default: | |
b2a554ff | 1964 | printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", |
853e2bd2 BG |
1965 | io_req->fcp_status); |
1966 | break; | |
1967 | } | |
1968 | sc_cmd->SCp.ptr = NULL; | |
1969 | sc_cmd->scsi_done(sc_cmd); | |
1970 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
1971 | } | |
1972 | ||
74446954 | 1973 | int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, |
853e2bd2 BG |
1974 | struct bnx2fc_cmd *io_req) |
1975 | { | |
1976 | struct fcoe_task_ctx_entry *task; | |
1977 | struct fcoe_task_ctx_entry *task_page; | |
1978 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1979 | struct fcoe_port *port = tgt->port; | |
aea71a02 BPG |
1980 | struct bnx2fc_interface *interface = port->priv; |
1981 | struct bnx2fc_hba *hba = interface->hba; | |
853e2bd2 | 1982 | struct fc_lport *lport = port->lport; |
1bd49b48 | 1983 | struct fc_stats *stats; |
853e2bd2 BG |
1984 | int task_idx, index; |
1985 | u16 xid; | |
1986 | ||
dc6311dd ML |
1987 | /* bnx2fc_post_io_req() is called with the tgt_lock held */ |
1988 | ||
853e2bd2 BG |
1989 | /* Initialize rest of io_req fields */ |
1990 | io_req->cmd_type = BNX2FC_SCSI_CMD; | |
1991 | io_req->port = port; | |
1992 | io_req->tgt = tgt; | |
1993 | io_req->data_xfer_len = scsi_bufflen(sc_cmd); | |
1994 | sc_cmd->SCp.ptr = (char *)io_req; | |
1995 | ||
1bd49b48 | 1996 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
853e2bd2 BG |
1997 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { |
1998 | io_req->io_req_flags = BNX2FC_READ; | |
1999 | stats->InputRequests++; | |
2000 | stats->InputBytes += io_req->data_xfer_len; | |
2001 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { | |
2002 | io_req->io_req_flags = BNX2FC_WRITE; | |
2003 | stats->OutputRequests++; | |
2004 | stats->OutputBytes += io_req->data_xfer_len; | |
2005 | } else { | |
2006 | io_req->io_req_flags = 0; | |
2007 | stats->ControlRequests++; | |
2008 | } | |
2009 | put_cpu(); | |
2010 | ||
2011 | xid = io_req->xid; | |
2012 | ||
2013 | /* Build buffer descriptor list for firmware from sg list */ | |
822f2903 BPG |
2014 | if (bnx2fc_build_bd_list_from_sg(io_req)) { |
2015 | printk(KERN_ERR PFX "BD list creation failed\n"); | |
822f2903 | 2016 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
822f2903 BPG |
2017 | return -EAGAIN; |
2018 | } | |
853e2bd2 BG |
2019 | |
2020 | task_idx = xid / BNX2FC_TASKS_PER_PAGE; | |
2021 | index = xid % BNX2FC_TASKS_PER_PAGE; | |
2022 | ||
2023 | /* Initialize task context for this IO request */ | |
2024 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; | |
2025 | task = &(task_page[index]); | |
2026 | bnx2fc_init_task(io_req, task); | |
2027 | ||
853e2bd2 BG |
2028 | if (tgt->flush_in_prog) { |
2029 | printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); | |
2030 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
853e2bd2 BG |
2031 | return -EAGAIN; |
2032 | } | |
2033 | ||
2034 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { | |
2035 | printk(KERN_ERR PFX "Session not ready...post_io\n"); | |
2036 | kref_put(&io_req->refcount, bnx2fc_cmd_release); | |
853e2bd2 BG |
2037 | return -EAGAIN; |
2038 | } | |
2039 | ||
2040 | /* Time IO req */ | |
b252f4c7 BPG |
2041 | if (tgt->io_timeout) |
2042 | bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); | |
853e2bd2 BG |
2043 | /* Obtain free SQ entry */ |
2044 | bnx2fc_add_2_sq(tgt, xid); | |
2045 | ||
2046 | /* Enqueue the io_req to active_cmd_queue */ | |
2047 | ||
2048 | io_req->on_active_queue = 1; | |
2049 | /* move io_req from pending_queue to active_queue */ | |
2050 | list_add_tail(&io_req->link, &tgt->active_cmd_queue); | |
2051 | ||
2052 | /* Ring doorbell */ | |
2053 | bnx2fc_ring_doorbell(tgt); | |
853e2bd2 BG |
2054 | return 0; |
2055 | } |