1 | /* bnx2fc_io.c: QLogic Linux FCoE offload driver. |
2 | * IO manager and SCSI IO processing. |
3 | * |
4 | * Copyright (c) 2008-2013 Broadcom Corporation |
5 | * Copyright (c) 2014-2016 QLogic Corporation |
6 | * Copyright (c) 2016-2017 Cavium Inc. |
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" |
16 | |
17 | #define RESERVE_FREE_LIST_INDEX num_possible_cpus() |
18 | |
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); |
22 | static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); |
23 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); |
24 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); |
25 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, |
26 | struct fcoe_fcp_rsp_payload *fcp_rsp, |
27 | u8 num_rq, unsigned char *rq_data); |
28 | |
29 | void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, |
30 | unsigned int timer_msec) |
31 | { |
32 | struct bnx2fc_interface *interface = io_req->port->priv; |
33 | |
34 | if (queue_delayed_work(wq: interface->timer_work_queue, |
35 | dwork: &io_req->timeout_work, |
36 | delay: msecs_to_jiffies(m: timer_msec))) |
37 | kref_get(kref: &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); |
44 | u8 cmd_type = io_req->cmd_type; |
45 | struct bnx2fc_rport *tgt = io_req->tgt; |
46 | int rc; |
47 | |
48 | BNX2FC_IO_DBG(io_req, fmt: "cmd_timeout, cmd_type = %d," |
49 | "req_flags = %lx\n" , cmd_type, io_req->req_flags); |
50 | |
51 | spin_lock_bh(lock: &tgt->tgt_lock); |
52 | if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, addr: &io_req->req_flags)) { |
53 | clear_bit(BNX2FC_FLAG_RETIRE_OXID, addr: &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(lock: &tgt->tgt_lock); |
59 | bnx2fc_send_rrq(aborted_io_req: io_req); |
60 | return; |
61 | } |
62 | if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, addr: &io_req->req_flags)) { |
63 | BNX2FC_IO_DBG(io_req, fmt: "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 | addr: &io_req->req_flags)) { |
71 | /* Handle eh_abort timeout */ |
72 | BNX2FC_IO_DBG(io_req, fmt: "eh_abort timed out\n" ); |
73 | complete(&io_req->abts_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, fmt: "ABTS timed out refcnt = %d\n" , |
78 | kref_read(kref: &io_req->refcount)); |
79 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
80 | addr: &io_req->req_flags))) { |
81 | /* |
82 | * Cleanup and return original command to |
83 | * mid-layer. |
84 | */ |
85 | bnx2fc_initiate_cleanup(io_req); |
86 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
87 | spin_unlock_bh(lock: &tgt->tgt_lock); |
88 | |
89 | return; |
90 | } |
91 | } else { |
92 | /* Hanlde IO timeout */ |
93 | BNX2FC_IO_DBG(io_req, fmt: "IO timed out. issue ABTS\n" ); |
94 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, |
95 | addr: &io_req->req_flags)) { |
96 | BNX2FC_IO_DBG(io_req, fmt: "IO completed before " |
97 | " timer expiry\n" ); |
98 | goto done; |
99 | } |
100 | |
101 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
102 | addr: &io_req->req_flags)) { |
103 | rc = bnx2fc_initiate_abts(io_req); |
104 | if (rc == SUCCESS) |
105 | goto done; |
106 | |
107 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
108 | spin_unlock_bh(lock: &tgt->tgt_lock); |
109 | |
110 | return; |
111 | } else { |
112 | BNX2FC_IO_DBG(io_req, fmt: "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, fmt: "ABTS for ELS timed out\n" ); |
121 | |
122 | if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
123 | addr: &io_req->req_flags)) { |
124 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
125 | spin_unlock_bh(lock: &tgt->tgt_lock); |
126 | |
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, fmt: "ELS timed out\n" ); |
137 | if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, |
138 | addr: &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, addr: &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(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
159 | spin_unlock_bh(lock: &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, fmt: "scsi_done. err_code = 0x%x\n" , err_code); |
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 | |
181 | bnx2fc_unmap_sg_list(io_req); |
182 | io_req->sc_cmd = NULL; |
183 | |
184 | /* Sanity checks before returning command to mid-layer */ |
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 | } |
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 | |
201 | sc_cmd->result = err_code << 16; |
202 | |
203 | BNX2FC_IO_DBG(io_req, fmt: "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(cmd: sc_cmd, resid: scsi_bufflen(cmd: sc_cmd)); |
207 | bnx2fc_priv(cmd: sc_cmd)->io_req = NULL; |
208 | scsi_done(cmd: sc_cmd); |
209 | } |
210 | |
211 | struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba) |
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; |
220 | int num_ios, num_pri_ios; |
221 | size_t bd_tbl_sz; |
222 | int arr_sz = num_possible_cpus() + 1; |
223 | u16 min_xid = BNX2FC_MIN_XID; |
224 | u16 max_xid = hba->max_xid; |
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(size: len, GFP_KERNEL); |
238 | if (!cmgr) { |
239 | printk(KERN_ERR PFX "failed to alloc cmgr\n" ); |
240 | return NULL; |
241 | } |
242 | |
243 | cmgr->hba = hba; |
244 | cmgr->free_list = kcalloc(n: arr_sz, size: sizeof(*cmgr->free_list), |
245 | GFP_KERNEL); |
246 | if (!cmgr->free_list) { |
247 | printk(KERN_ERR PFX "failed to alloc free_list\n" ); |
248 | goto mem_err; |
249 | } |
250 | |
251 | cmgr->free_list_lock = kcalloc(n: arr_sz, size: sizeof(*cmgr->free_list_lock), |
252 | GFP_KERNEL); |
253 | if (!cmgr->free_list_lock) { |
254 | printk(KERN_ERR PFX "failed to alloc free_list_lock\n" ); |
255 | kfree(objp: cmgr->free_list); |
256 | cmgr->free_list = NULL; |
257 | goto mem_err; |
258 | } |
259 | |
260 | cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); |
261 | |
262 | for (i = 0; i < arr_sz; i++) { |
263 | INIT_LIST_HEAD(list: &cmgr->free_list[i]); |
264 | spin_lock_init(&cmgr->free_list_lock[i]); |
265 | } |
266 | |
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 | */ |
272 | xid = BNX2FC_MIN_XID; |
273 | num_pri_ios = num_ios - hba->elstm_xids; |
274 | for (i = 0; i < num_ios; i++) { |
275 | io_req = kzalloc(size: 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(list: &io_req->link); |
283 | INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); |
284 | |
285 | io_req->xid = xid++; |
286 | if (i < num_pri_ios) |
287 | list_add_tail(new: &io_req->link, |
288 | head: &cmgr->free_list[io_req->xid % |
289 | num_possible_cpus()]); |
290 | else |
291 | list_add_tail(new: &io_req->link, |
292 | head: &cmgr->free_list[num_possible_cpus()]); |
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 *); |
298 | cmgr->io_bdt_pool = kzalloc(size: mem_size, GFP_KERNEL); |
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(size: 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(dev: &hba->pcidev->dev, |
319 | size: bd_tbl_sz, |
320 | dma_handle: &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; |
342 | u16 max_xid = hba->max_xid; |
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(dev: &hba->pcidev->dev, size: bd_tbl_sz, |
357 | cpu_addr: bdt_info->bd_tbl, |
358 | dma_handle: 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(objp: cmgr->io_bdt_pool[i]); |
366 | cmgr->io_bdt_pool[i] = NULL; |
367 | } |
368 | |
369 | kfree(objp: cmgr->io_bdt_pool); |
370 | cmgr->io_bdt_pool = NULL; |
371 | |
372 | free_cmd_pool: |
373 | kfree(objp: cmgr->free_list_lock); |
374 | |
375 | /* Destroy cmd pool */ |
376 | if (!cmgr->free_list) |
377 | goto free_cmgr; |
378 | |
379 | for (i = 0; i < num_possible_cpus() + 1; i++) { |
380 | struct bnx2fc_cmd *tmp, *io_req; |
381 | |
382 | list_for_each_entry_safe(io_req, tmp, |
383 | &cmgr->free_list[i], link) { |
384 | list_del(entry: &io_req->link); |
385 | kfree(objp: io_req); |
386 | } |
387 | } |
388 | kfree(objp: cmgr->free_list); |
389 | free_cmgr: |
390 | /* Free command manager itself */ |
391 | kfree(objp: cmgr); |
392 | } |
393 | |
394 | struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) |
395 | { |
396 | struct fcoe_port *port = tgt->port; |
397 | struct bnx2fc_interface *interface = port->priv; |
398 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; |
399 | struct bnx2fc_cmd *io_req; |
400 | struct list_head *listp; |
401 | struct io_bdt *bd_tbl; |
402 | int index = RESERVE_FREE_LIST_INDEX; |
403 | u32 free_sqes; |
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 | */ |
423 | spin_lock_bh(lock: &cmd_mgr->free_list_lock[index]); |
424 | free_sqes = atomic_read(v: &tgt->free_sqes); |
425 | if ((list_empty(head: &(cmd_mgr->free_list[index]))) || |
426 | (tgt->num_active_ios.counter >= max_sqes) || |
427 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { |
428 | BNX2FC_TGT_DBG(tgt, fmt: "No free els_tm cmds available " |
429 | "ios(%d):sqes(%d)\n" , |
430 | tgt->num_active_ios.counter, tgt->max_sqes); |
431 | if (list_empty(head: &(cmd_mgr->free_list[index]))) |
432 | printk(KERN_ERR PFX "elstm_alloc: list_empty\n" ); |
433 | spin_unlock_bh(lock: &cmd_mgr->free_list_lock[index]); |
434 | return NULL; |
435 | } |
436 | |
437 | listp = (struct list_head *) |
438 | cmd_mgr->free_list[index].next; |
439 | list_del_init(entry: listp); |
440 | io_req = (struct bnx2fc_cmd *) listp; |
441 | xid = io_req->xid; |
442 | cmd_mgr->cmds[xid] = io_req; |
443 | atomic_inc(v: &tgt->num_active_ios); |
444 | atomic_dec(v: &tgt->free_sqes); |
445 | spin_unlock_bh(lock: &cmd_mgr->free_list_lock[index]); |
446 | |
447 | INIT_LIST_HEAD(list: &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(kref: &io_req->refcount); |
461 | return io_req; |
462 | } |
463 | |
464 | struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) |
465 | { |
466 | struct fcoe_port *port = tgt->port; |
467 | struct bnx2fc_interface *interface = port->priv; |
468 | struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; |
469 | struct bnx2fc_cmd *io_req; |
470 | struct list_head *listp; |
471 | struct io_bdt *bd_tbl; |
472 | u32 free_sqes; |
473 | u32 max_sqes; |
474 | u16 xid; |
475 | int index = raw_smp_processor_id(); |
476 | |
477 | max_sqes = BNX2FC_SCSI_MAX_SQES; |
478 | /* |
479 | * NOTE: Free list insertions and deletions are protected with |
480 | * cmgr lock |
481 | */ |
482 | spin_lock_bh(lock: &cmd_mgr->free_list_lock[index]); |
483 | free_sqes = atomic_read(v: &tgt->free_sqes); |
484 | if ((list_empty(head: &cmd_mgr->free_list[index])) || |
485 | (tgt->num_active_ios.counter >= max_sqes) || |
486 | (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { |
487 | spin_unlock_bh(lock: &cmd_mgr->free_list_lock[index]); |
488 | return NULL; |
489 | } |
490 | |
491 | listp = (struct list_head *) |
492 | cmd_mgr->free_list[index].next; |
493 | list_del_init(entry: listp); |
494 | io_req = (struct bnx2fc_cmd *) listp; |
495 | xid = io_req->xid; |
496 | cmd_mgr->cmds[xid] = io_req; |
497 | atomic_inc(v: &tgt->num_active_ios); |
498 | atomic_dec(v: &tgt->free_sqes); |
499 | spin_unlock_bh(lock: &cmd_mgr->free_list_lock[index]); |
500 | |
501 | INIT_LIST_HEAD(list: &io_req->link); |
502 | |
503 | io_req->port = port; |
504 | io_req->cmd_mgr = cmd_mgr; |
505 | io_req->req_flags = 0; |
506 | |
507 | /* Bind io_bdt for this io_req */ |
508 | /* Have a static link between io_req and io_bdt_pool */ |
509 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; |
510 | bd_tbl->io_req = io_req; |
511 | |
512 | /* Hold the io_req against deletion */ |
513 | kref_init(kref: &io_req->refcount); |
514 | return io_req; |
515 | } |
516 | |
517 | void bnx2fc_cmd_release(struct kref *ref) |
518 | { |
519 | struct bnx2fc_cmd *io_req = container_of(ref, |
520 | struct bnx2fc_cmd, refcount); |
521 | struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; |
522 | int index; |
523 | |
524 | if (io_req->cmd_type == BNX2FC_SCSI_CMD) |
525 | index = io_req->xid % num_possible_cpus(); |
526 | else |
527 | index = RESERVE_FREE_LIST_INDEX; |
528 | |
529 | |
530 | spin_lock_bh(lock: &cmd_mgr->free_list_lock[index]); |
531 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
532 | bnx2fc_free_mp_resc(io_req); |
533 | cmd_mgr->cmds[io_req->xid] = NULL; |
534 | /* Delete IO from retire queue */ |
535 | list_del_init(entry: &io_req->link); |
536 | /* Add it to the free list */ |
537 | list_add(new: &io_req->link, |
538 | head: &cmd_mgr->free_list[index]); |
539 | atomic_dec(v: &io_req->tgt->num_active_ios); |
540 | spin_unlock_bh(lock: &cmd_mgr->free_list_lock[index]); |
541 | |
542 | } |
543 | |
544 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) |
545 | { |
546 | struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); |
547 | struct bnx2fc_interface *interface = io_req->port->priv; |
548 | struct bnx2fc_hba *hba = interface->hba; |
549 | size_t sz = sizeof(struct fcoe_bd_ctx); |
550 | |
551 | /* clear tm flags */ |
552 | mp_req->tm_flags = 0; |
553 | if (mp_req->mp_req_bd) { |
554 | dma_free_coherent(dev: &hba->pcidev->dev, size: sz, |
555 | cpu_addr: mp_req->mp_req_bd, |
556 | dma_handle: mp_req->mp_req_bd_dma); |
557 | mp_req->mp_req_bd = NULL; |
558 | } |
559 | if (mp_req->mp_resp_bd) { |
560 | dma_free_coherent(dev: &hba->pcidev->dev, size: sz, |
561 | cpu_addr: mp_req->mp_resp_bd, |
562 | dma_handle: mp_req->mp_resp_bd_dma); |
563 | mp_req->mp_resp_bd = NULL; |
564 | } |
565 | if (mp_req->req_buf) { |
566 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
567 | cpu_addr: mp_req->req_buf, |
568 | dma_handle: mp_req->req_buf_dma); |
569 | mp_req->req_buf = NULL; |
570 | } |
571 | if (mp_req->resp_buf) { |
572 | dma_free_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
573 | cpu_addr: mp_req->resp_buf, |
574 | dma_handle: mp_req->resp_buf_dma); |
575 | mp_req->resp_buf = NULL; |
576 | } |
577 | } |
578 | |
579 | int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) |
580 | { |
581 | struct bnx2fc_mp_req *mp_req; |
582 | struct fcoe_bd_ctx *mp_req_bd; |
583 | struct fcoe_bd_ctx *mp_resp_bd; |
584 | struct bnx2fc_interface *interface = io_req->port->priv; |
585 | struct bnx2fc_hba *hba = interface->hba; |
586 | dma_addr_t addr; |
587 | size_t sz; |
588 | |
589 | mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); |
590 | memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); |
591 | |
592 | if (io_req->cmd_type != BNX2FC_ELS) { |
593 | mp_req->req_len = sizeof(struct fcp_cmnd); |
594 | io_req->data_xfer_len = mp_req->req_len; |
595 | } else |
596 | mp_req->req_len = io_req->data_xfer_len; |
597 | |
598 | mp_req->req_buf = dma_alloc_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
599 | dma_handle: &mp_req->req_buf_dma, |
600 | GFP_ATOMIC); |
601 | if (!mp_req->req_buf) { |
602 | printk(KERN_ERR PFX "unable to alloc MP req buffer\n" ); |
603 | bnx2fc_free_mp_resc(io_req); |
604 | return FAILED; |
605 | } |
606 | |
607 | mp_req->resp_buf = dma_alloc_coherent(dev: &hba->pcidev->dev, CNIC_PAGE_SIZE, |
608 | dma_handle: &mp_req->resp_buf_dma, |
609 | GFP_ATOMIC); |
610 | if (!mp_req->resp_buf) { |
611 | printk(KERN_ERR PFX "unable to alloc TM resp buffer\n" ); |
612 | bnx2fc_free_mp_resc(io_req); |
613 | return FAILED; |
614 | } |
615 | memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE); |
616 | memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE); |
617 | |
618 | /* Allocate and map mp_req_bd and mp_resp_bd */ |
619 | sz = sizeof(struct fcoe_bd_ctx); |
620 | mp_req->mp_req_bd = dma_alloc_coherent(dev: &hba->pcidev->dev, size: sz, |
621 | dma_handle: &mp_req->mp_req_bd_dma, |
622 | GFP_ATOMIC); |
623 | if (!mp_req->mp_req_bd) { |
624 | printk(KERN_ERR PFX "unable to alloc MP req bd\n" ); |
625 | bnx2fc_free_mp_resc(io_req); |
626 | return FAILED; |
627 | } |
628 | mp_req->mp_resp_bd = dma_alloc_coherent(dev: &hba->pcidev->dev, size: sz, |
629 | dma_handle: &mp_req->mp_resp_bd_dma, |
630 | GFP_ATOMIC); |
631 | if (!mp_req->mp_resp_bd) { |
632 | printk(KERN_ERR PFX "unable to alloc MP resp bd\n" ); |
633 | bnx2fc_free_mp_resc(io_req); |
634 | return FAILED; |
635 | } |
636 | /* Fill bd table */ |
637 | addr = mp_req->req_buf_dma; |
638 | mp_req_bd = mp_req->mp_req_bd; |
639 | mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; |
640 | mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); |
641 | mp_req_bd->buf_len = CNIC_PAGE_SIZE; |
642 | mp_req_bd->flags = 0; |
643 | |
644 | /* |
645 | * MP buffer is either a task mgmt command or an ELS. |
646 | * So the assumption is that it consumes a single bd |
647 | * entry in the bd table |
648 | */ |
649 | mp_resp_bd = mp_req->mp_resp_bd; |
650 | addr = mp_req->resp_buf_dma; |
651 | mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; |
652 | mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); |
653 | mp_resp_bd->buf_len = CNIC_PAGE_SIZE; |
654 | mp_resp_bd->flags = 0; |
655 | |
656 | return SUCCESS; |
657 | } |
658 | |
659 | static int bnx2fc_initiate_tmf(struct fc_lport *lport, struct fc_rport *rport, |
660 | u64 tm_lun, u8 tm_flags) |
661 | { |
662 | struct fc_rport_libfc_priv *rp; |
663 | struct fcoe_port *port; |
664 | struct bnx2fc_interface *interface; |
665 | struct bnx2fc_rport *tgt; |
666 | struct bnx2fc_cmd *io_req; |
667 | struct bnx2fc_mp_req *tm_req; |
668 | struct fcoe_task_ctx_entry *task; |
669 | struct fcoe_task_ctx_entry *task_page; |
670 | struct fc_frame_header *fc_hdr; |
671 | struct fcp_cmnd *fcp_cmnd; |
672 | int task_idx, index; |
673 | int rc = SUCCESS; |
674 | u16 xid; |
675 | u32 sid, did; |
676 | unsigned long start = jiffies; |
677 | |
678 | port = lport_priv(lport); |
679 | interface = port->priv; |
680 | |
681 | if (rport == NULL) { |
682 | printk(KERN_ERR PFX "device_reset: rport is NULL\n" ); |
683 | rc = FAILED; |
684 | goto tmf_err; |
685 | } |
686 | rp = rport->dd_data; |
687 | |
688 | rc = fc_block_rport(rport); |
689 | if (rc) |
690 | return rc; |
691 | |
692 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
693 | printk(KERN_ERR PFX "device_reset: link is not ready\n" ); |
694 | rc = FAILED; |
695 | goto tmf_err; |
696 | } |
697 | /* rport and tgt are allocated together, so tgt should be non-NULL */ |
698 | tgt = (struct bnx2fc_rport *)&rp[1]; |
699 | |
700 | if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { |
701 | printk(KERN_ERR PFX "device_reset: tgt not offloaded\n" ); |
702 | rc = FAILED; |
703 | goto tmf_err; |
704 | } |
705 | retry_tmf: |
706 | io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); |
707 | if (!io_req) { |
708 | if (time_after(jiffies, start + HZ)) { |
709 | printk(KERN_ERR PFX "tmf: Failed TMF" ); |
710 | rc = FAILED; |
711 | goto tmf_err; |
712 | } |
713 | msleep(msecs: 20); |
714 | goto retry_tmf; |
715 | } |
716 | /* Initialize rest of io_req fields */ |
717 | io_req->sc_cmd = NULL; |
718 | io_req->port = port; |
719 | io_req->tgt = tgt; |
720 | |
721 | tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); |
722 | |
723 | rc = bnx2fc_init_mp_req(io_req); |
724 | if (rc == FAILED) { |
725 | printk(KERN_ERR PFX "Task mgmt MP request init failed\n" ); |
726 | spin_lock_bh(lock: &tgt->tgt_lock); |
727 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
728 | spin_unlock_bh(lock: &tgt->tgt_lock); |
729 | goto tmf_err; |
730 | } |
731 | |
732 | /* Set TM flags */ |
733 | io_req->io_req_flags = 0; |
734 | tm_req->tm_flags = tm_flags; |
735 | tm_req->tm_lun = tm_lun; |
736 | |
737 | /* Fill FCP_CMND */ |
738 | bnx2fc_build_fcp_cmnd(io_req, fcp_cmnd: (struct fcp_cmnd *)tm_req->req_buf); |
739 | fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; |
740 | int_to_scsilun(tm_lun, &fcp_cmnd->fc_lun); |
741 | memset(fcp_cmnd->fc_cdb, 0, BNX2FC_MAX_CMD_LEN); |
742 | fcp_cmnd->fc_dl = 0; |
743 | |
744 | /* Fill FC header */ |
745 | fc_hdr = &(tm_req->req_fc_hdr); |
746 | sid = tgt->sid; |
747 | did = rport->port_id; |
748 | __fc_fill_fc_hdr(fh: fc_hdr, r_ctl: FC_RCTL_DD_UNSOL_CMD, did, sid, |
749 | type: FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | |
750 | FC_FC_SEQ_INIT, parm_offset: 0); |
751 | /* Obtain exchange id */ |
752 | xid = io_req->xid; |
753 | |
754 | BNX2FC_TGT_DBG(tgt, fmt: "Initiate TMF - xid = 0x%x\n" , xid); |
755 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
756 | index = xid % BNX2FC_TASKS_PER_PAGE; |
757 | |
758 | /* Initialize task context for this IO request */ |
759 | task_page = (struct fcoe_task_ctx_entry *) |
760 | interface->hba->task_ctx[task_idx]; |
761 | task = &(task_page[index]); |
762 | bnx2fc_init_mp_task(io_req, task); |
763 | |
764 | /* Obtain free SQ entry */ |
765 | spin_lock_bh(lock: &tgt->tgt_lock); |
766 | bnx2fc_add_2_sq(tgt, xid); |
767 | |
768 | /* Enqueue the io_req to active_tm_queue */ |
769 | io_req->on_tmf_queue = 1; |
770 | list_add_tail(new: &io_req->link, head: &tgt->active_tm_queue); |
771 | |
772 | init_completion(x: &io_req->abts_done); |
773 | io_req->wait_for_abts_comp = 1; |
774 | |
775 | /* Ring doorbell */ |
776 | bnx2fc_ring_doorbell(tgt); |
777 | spin_unlock_bh(lock: &tgt->tgt_lock); |
778 | |
779 | rc = wait_for_completion_timeout(x: &io_req->abts_done, |
780 | timeout: interface->tm_timeout * HZ); |
781 | spin_lock_bh(lock: &tgt->tgt_lock); |
782 | |
783 | io_req->wait_for_abts_comp = 0; |
784 | if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { |
785 | set_bit(BNX2FC_FLAG_TM_TIMEOUT, addr: &io_req->req_flags); |
786 | if (io_req->on_tmf_queue) { |
787 | list_del_init(entry: &io_req->link); |
788 | io_req->on_tmf_queue = 0; |
789 | } |
790 | io_req->wait_for_cleanup_comp = 1; |
791 | init_completion(x: &io_req->cleanup_done); |
792 | bnx2fc_initiate_cleanup(io_req); |
793 | spin_unlock_bh(lock: &tgt->tgt_lock); |
794 | rc = wait_for_completion_timeout(x: &io_req->cleanup_done, |
795 | BNX2FC_FW_TIMEOUT); |
796 | spin_lock_bh(lock: &tgt->tgt_lock); |
797 | io_req->wait_for_cleanup_comp = 0; |
798 | if (!rc) |
799 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
800 | } |
801 | |
802 | spin_unlock_bh(lock: &tgt->tgt_lock); |
803 | |
804 | if (!rc) { |
805 | BNX2FC_TGT_DBG(tgt, fmt: "task mgmt command failed...\n" ); |
806 | rc = FAILED; |
807 | } else { |
808 | BNX2FC_TGT_DBG(tgt, fmt: "task mgmt command success...\n" ); |
809 | rc = SUCCESS; |
810 | } |
811 | tmf_err: |
812 | return rc; |
813 | } |
814 | |
815 | int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) |
816 | { |
817 | struct fc_lport *lport; |
818 | struct bnx2fc_rport *tgt = io_req->tgt; |
819 | struct fc_rport *rport = tgt->rport; |
820 | struct fc_rport_priv *rdata = tgt->rdata; |
821 | struct bnx2fc_interface *interface; |
822 | struct fcoe_port *port; |
823 | struct bnx2fc_cmd *abts_io_req; |
824 | struct fcoe_task_ctx_entry *task; |
825 | struct fcoe_task_ctx_entry *task_page; |
826 | struct fc_frame_header *fc_hdr; |
827 | struct bnx2fc_mp_req *abts_req; |
828 | int task_idx, index; |
829 | u32 sid, did; |
830 | u16 xid; |
831 | int rc = SUCCESS; |
832 | u32 r_a_tov = rdata->r_a_tov; |
833 | |
834 | /* called with tgt_lock held */ |
835 | BNX2FC_IO_DBG(io_req, fmt: "Entered bnx2fc_initiate_abts\n" ); |
836 | |
837 | port = io_req->port; |
838 | interface = port->priv; |
839 | lport = port->lport; |
840 | |
841 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
842 | printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n" ); |
843 | rc = FAILED; |
844 | goto abts_err; |
845 | } |
846 | |
847 | if (rport == NULL) { |
848 | printk(KERN_ERR PFX "initiate_abts: rport is NULL\n" ); |
849 | rc = FAILED; |
850 | goto abts_err; |
851 | } |
852 | |
853 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
854 | printk(KERN_ERR PFX "initiate_abts: link is not ready\n" ); |
855 | rc = FAILED; |
856 | goto abts_err; |
857 | } |
858 | |
859 | abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); |
860 | if (!abts_io_req) { |
861 | printk(KERN_ERR PFX "abts: couldn't allocate cmd\n" ); |
862 | rc = FAILED; |
863 | goto abts_err; |
864 | } |
865 | |
866 | /* Initialize rest of io_req fields */ |
867 | abts_io_req->sc_cmd = NULL; |
868 | abts_io_req->port = port; |
869 | abts_io_req->tgt = tgt; |
870 | abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ |
871 | |
872 | abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); |
873 | memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); |
874 | |
875 | /* Fill FC header */ |
876 | fc_hdr = &(abts_req->req_fc_hdr); |
877 | |
878 | /* Obtain oxid and rxid for the original exchange to be aborted */ |
879 | fc_hdr->fh_ox_id = htons(io_req->xid); |
880 | fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); |
881 | |
882 | sid = tgt->sid; |
883 | did = rport->port_id; |
884 | |
885 | __fc_fill_fc_hdr(fh: fc_hdr, r_ctl: FC_RCTL_BA_ABTS, did, sid, |
886 | type: FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | |
887 | FC_FC_SEQ_INIT, parm_offset: 0); |
888 | |
889 | xid = abts_io_req->xid; |
890 | BNX2FC_IO_DBG(io_req: abts_io_req, fmt: "ABTS io_req\n" ); |
891 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
892 | index = xid % BNX2FC_TASKS_PER_PAGE; |
893 | |
894 | /* Initialize task context for this IO request */ |
895 | task_page = (struct fcoe_task_ctx_entry *) |
896 | interface->hba->task_ctx[task_idx]; |
897 | task = &(task_page[index]); |
898 | bnx2fc_init_mp_task(io_req: abts_io_req, task); |
899 | |
900 | /* |
901 | * ABTS task is a temporary task that will be cleaned up |
902 | * irrespective of ABTS response. We need to start the timer |
903 | * for the original exchange, as the CQE is posted for the original |
904 | * IO request. |
905 | * |
906 | * Timer for ABTS is started only when it is originated by a |
907 | * TM request. For the ABTS issued as part of ULP timeout, |
908 | * scsi-ml maintains the timers. |
909 | */ |
910 | |
911 | /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ |
912 | bnx2fc_cmd_timer_set(io_req, timer_msec: 2 * r_a_tov); |
913 | |
914 | /* Obtain free SQ entry */ |
915 | bnx2fc_add_2_sq(tgt, xid); |
916 | |
917 | /* Ring doorbell */ |
918 | bnx2fc_ring_doorbell(tgt); |
919 | |
920 | abts_err: |
921 | return rc; |
922 | } |
923 | |
924 | int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, |
925 | enum fc_rctl r_ctl) |
926 | { |
927 | struct bnx2fc_rport *tgt = orig_io_req->tgt; |
928 | struct bnx2fc_interface *interface; |
929 | struct fcoe_port *port; |
930 | struct bnx2fc_cmd *seq_clnp_req; |
931 | struct fcoe_task_ctx_entry *task; |
932 | struct fcoe_task_ctx_entry *task_page; |
933 | struct bnx2fc_els_cb_arg *cb_arg = NULL; |
934 | int task_idx, index; |
935 | u16 xid; |
936 | int rc = 0; |
937 | |
938 | BNX2FC_IO_DBG(io_req: orig_io_req, fmt: "bnx2fc_initiate_seq_cleanup xid = 0x%x\n" , |
939 | orig_io_req->xid); |
940 | kref_get(kref: &orig_io_req->refcount); |
941 | |
942 | port = orig_io_req->port; |
943 | interface = port->priv; |
944 | |
945 | cb_arg = kzalloc(size: sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
946 | if (!cb_arg) { |
947 | printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n" ); |
948 | rc = -ENOMEM; |
949 | goto cleanup_err; |
950 | } |
951 | |
952 | seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); |
953 | if (!seq_clnp_req) { |
954 | printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n" ); |
955 | rc = -ENOMEM; |
956 | kfree(objp: cb_arg); |
957 | goto cleanup_err; |
958 | } |
959 | /* Initialize rest of io_req fields */ |
960 | seq_clnp_req->sc_cmd = NULL; |
961 | seq_clnp_req->port = port; |
962 | seq_clnp_req->tgt = tgt; |
963 | seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ |
964 | |
965 | xid = seq_clnp_req->xid; |
966 | |
967 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
968 | index = xid % BNX2FC_TASKS_PER_PAGE; |
969 | |
970 | /* Initialize task context for this IO request */ |
971 | task_page = (struct fcoe_task_ctx_entry *) |
972 | interface->hba->task_ctx[task_idx]; |
973 | task = &(task_page[index]); |
974 | cb_arg->aborted_io_req = orig_io_req; |
975 | cb_arg->io_req = seq_clnp_req; |
976 | cb_arg->r_ctl = r_ctl; |
977 | cb_arg->offset = offset; |
978 | seq_clnp_req->cb_arg = cb_arg; |
979 | |
980 | printk(KERN_ERR PFX "call init_seq_cleanup_task\n" ); |
981 | bnx2fc_init_seq_cleanup_task(seq_clnup_req: seq_clnp_req, task, orig_io_req, offset); |
982 | |
983 | /* Obtain free SQ entry */ |
984 | bnx2fc_add_2_sq(tgt, xid); |
985 | |
986 | /* Ring doorbell */ |
987 | bnx2fc_ring_doorbell(tgt); |
988 | cleanup_err: |
989 | return rc; |
990 | } |
991 | |
992 | int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) |
993 | { |
994 | struct bnx2fc_rport *tgt = io_req->tgt; |
995 | struct bnx2fc_interface *interface; |
996 | struct fcoe_port *port; |
997 | struct bnx2fc_cmd *cleanup_io_req; |
998 | struct fcoe_task_ctx_entry *task; |
999 | struct fcoe_task_ctx_entry *task_page; |
1000 | int task_idx, index; |
1001 | u16 xid, orig_xid; |
1002 | int rc = 0; |
1003 | |
1004 | /* ASSUMPTION: called with tgt_lock held */ |
1005 | BNX2FC_IO_DBG(io_req, fmt: "Entered bnx2fc_initiate_cleanup\n" ); |
1006 | |
1007 | port = io_req->port; |
1008 | interface = port->priv; |
1009 | |
1010 | cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); |
1011 | if (!cleanup_io_req) { |
1012 | printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n" ); |
1013 | rc = -1; |
1014 | goto cleanup_err; |
1015 | } |
1016 | |
1017 | /* Initialize rest of io_req fields */ |
1018 | cleanup_io_req->sc_cmd = NULL; |
1019 | cleanup_io_req->port = port; |
1020 | cleanup_io_req->tgt = tgt; |
1021 | cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ |
1022 | |
1023 | xid = cleanup_io_req->xid; |
1024 | |
1025 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
1026 | index = xid % BNX2FC_TASKS_PER_PAGE; |
1027 | |
1028 | /* Initialize task context for this IO request */ |
1029 | task_page = (struct fcoe_task_ctx_entry *) |
1030 | interface->hba->task_ctx[task_idx]; |
1031 | task = &(task_page[index]); |
1032 | orig_xid = io_req->xid; |
1033 | |
1034 | BNX2FC_IO_DBG(io_req, fmt: "CLEANUP io_req xid = 0x%x\n" , xid); |
1035 | |
1036 | bnx2fc_init_cleanup_task(io_req: cleanup_io_req, task, orig_xid); |
1037 | |
1038 | /* Obtain free SQ entry */ |
1039 | bnx2fc_add_2_sq(tgt, xid); |
1040 | |
1041 | /* Set flag that cleanup request is pending with the firmware */ |
1042 | set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, addr: &io_req->req_flags); |
1043 | |
1044 | /* Ring doorbell */ |
1045 | bnx2fc_ring_doorbell(tgt); |
1046 | |
1047 | cleanup_err: |
1048 | return rc; |
1049 | } |
1050 | |
1051 | /** |
1052 | * bnx2fc_eh_target_reset: Reset a target |
1053 | * |
1054 | * @sc_cmd: SCSI command |
1055 | * |
1056 | * Set from SCSI host template to send task mgmt command to the target |
1057 | * and wait for the response |
1058 | */ |
1059 | int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) |
1060 | { |
1061 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
1062 | struct fc_lport *lport = shost_priv(rport_to_shost(rport)); |
1063 | |
1064 | return bnx2fc_initiate_tmf(lport, rport, tm_lun: 0, FCP_TMF_TGT_RESET); |
1065 | } |
1066 | |
1067 | /** |
1068 | * bnx2fc_eh_device_reset - Reset a single LUN |
1069 | * |
1070 | * @sc_cmd: SCSI command |
1071 | * |
1072 | * Set from SCSI host template to send task mgmt command to the target |
1073 | * and wait for the response |
1074 | */ |
1075 | int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) |
1076 | { |
1077 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
1078 | struct fc_lport *lport = shost_priv(rport_to_shost(rport)); |
1079 | |
1080 | return bnx2fc_initiate_tmf(lport, rport, tm_lun: sc_cmd->device->lun, |
1081 | FCP_TMF_LUN_RESET); |
1082 | } |
1083 | |
1084 | static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req) |
1085 | __must_hold(&tgt->tgt_lock) |
1086 | { |
1087 | struct bnx2fc_rport *tgt = io_req->tgt; |
1088 | unsigned int time_left; |
1089 | |
1090 | init_completion(x: &io_req->cleanup_done); |
1091 | io_req->wait_for_cleanup_comp = 1; |
1092 | bnx2fc_initiate_cleanup(io_req); |
1093 | |
1094 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1095 | |
1096 | /* |
1097 | * Can't wait forever on cleanup response lest we let the SCSI error |
1098 | * handler wait forever |
1099 | */ |
1100 | time_left = wait_for_completion_timeout(x: &io_req->cleanup_done, |
1101 | BNX2FC_FW_TIMEOUT); |
1102 | if (!time_left) { |
1103 | BNX2FC_IO_DBG(io_req, fmt: "%s(): Wait for cleanup timed out.\n" , |
1104 | __func__); |
1105 | |
1106 | /* |
1107 | * Put the extra reference to the SCSI command since it would |
1108 | * not have been returned in this case. |
1109 | */ |
1110 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1111 | } |
1112 | |
1113 | spin_lock_bh(lock: &tgt->tgt_lock); |
1114 | io_req->wait_for_cleanup_comp = 0; |
1115 | return SUCCESS; |
1116 | } |
1117 | |
1118 | /** |
1119 | * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding |
1120 | * SCSI command |
1121 | * |
1122 | * @sc_cmd: SCSI_ML command pointer |
1123 | * |
1124 | * SCSI abort request handler |
1125 | */ |
1126 | int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) |
1127 | { |
1128 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
1129 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
1130 | struct bnx2fc_cmd *io_req; |
1131 | struct fc_lport *lport; |
1132 | struct bnx2fc_rport *tgt; |
1133 | int rc; |
1134 | unsigned int time_left; |
1135 | |
1136 | rc = fc_block_scsi_eh(cmnd: sc_cmd); |
1137 | if (rc) |
1138 | return rc; |
1139 | |
1140 | lport = shost_priv(shost: sc_cmd->device->host); |
1141 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { |
1142 | printk(KERN_ERR PFX "eh_abort: link not ready\n" ); |
1143 | return FAILED; |
1144 | } |
1145 | |
1146 | tgt = (struct bnx2fc_rport *)&rp[1]; |
1147 | |
1148 | BNX2FC_TGT_DBG(tgt, fmt: "Entered bnx2fc_eh_abort\n" ); |
1149 | |
1150 | spin_lock_bh(lock: &tgt->tgt_lock); |
1151 | io_req = bnx2fc_priv(cmd: sc_cmd)->io_req; |
1152 | if (!io_req) { |
1153 | /* Command might have just completed */ |
1154 | printk(KERN_ERR PFX "eh_abort: io_req is NULL\n" ); |
1155 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1156 | return SUCCESS; |
1157 | } |
1158 | BNX2FC_IO_DBG(io_req, fmt: "eh_abort - refcnt = %d\n" , |
1159 | kref_read(kref: &io_req->refcount)); |
1160 | |
1161 | /* Hold IO request across abort processing */ |
1162 | kref_get(kref: &io_req->refcount); |
1163 | |
1164 | BUG_ON(tgt != io_req->tgt); |
1165 | |
1166 | /* Remove the io_req from the active_q. */ |
1167 | /* |
1168 | * Task Mgmt functions (LUN RESET & TGT RESET) will not |
1169 | * issue an ABTS on this particular IO req, as the |
1170 | * io_req is no longer in the active_q. |
1171 | */ |
1172 | if (tgt->flush_in_prog) { |
1173 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
1174 | "flush in progress\n" , io_req->xid); |
1175 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1176 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1177 | return SUCCESS; |
1178 | } |
1179 | |
1180 | if (io_req->on_active_queue == 0) { |
1181 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
1182 | "not on active_q\n" , io_req->xid); |
1183 | /* |
1184 | * The IO is still with the FW. |
1185 | * Return failure and let SCSI-ml retry eh_abort. |
1186 | */ |
1187 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1188 | return FAILED; |
1189 | } |
1190 | |
1191 | /* |
1192 | * Only eh_abort processing will remove the IO from |
1193 | * active_cmd_q before processing the request. this is |
1194 | * done to avoid race conditions between IOs aborted |
1195 | * as part of task management completion and eh_abort |
1196 | * processing |
1197 | */ |
1198 | list_del_init(entry: &io_req->link); |
1199 | io_req->on_active_queue = 0; |
1200 | /* Move IO req to retire queue */ |
1201 | list_add_tail(new: &io_req->link, head: &tgt->io_retire_queue); |
1202 | |
1203 | init_completion(x: &io_req->abts_done); |
1204 | init_completion(x: &io_req->cleanup_done); |
1205 | |
1206 | if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, addr: &io_req->req_flags)) { |
1207 | printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " |
1208 | "already in abts processing\n" , io_req->xid); |
1209 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1210 | kref_put(kref: &io_req->refcount, |
1211 | release: bnx2fc_cmd_release); /* drop timer hold */ |
1212 | /* |
1213 | * We don't want to hold off the upper layer timer so simply |
1214 | * cleanup the command and return that I/O was successfully |
1215 | * aborted. |
1216 | */ |
1217 | bnx2fc_abts_cleanup(io_req); |
1218 | /* This only occurs when an task abort was requested while ABTS |
1219 | is in progress. Setting the IO_CLEANUP flag will skip the |
1220 | RRQ process in the case when the fw generated SCSI_CMD cmpl |
1221 | was a result from the ABTS request rather than the CLEANUP |
1222 | request */ |
1223 | set_bit(BNX2FC_FLAG_IO_CLEANUP, addr: &io_req->req_flags); |
1224 | rc = FAILED; |
1225 | goto done; |
1226 | } |
1227 | |
1228 | /* Cancel the current timer running on this io_req */ |
1229 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1230 | kref_put(kref: &io_req->refcount, |
1231 | release: bnx2fc_cmd_release); /* drop timer hold */ |
1232 | set_bit(BNX2FC_FLAG_EH_ABORT, addr: &io_req->req_flags); |
1233 | io_req->wait_for_abts_comp = 1; |
1234 | rc = bnx2fc_initiate_abts(io_req); |
1235 | if (rc == FAILED) { |
1236 | io_req->wait_for_cleanup_comp = 1; |
1237 | bnx2fc_initiate_cleanup(io_req); |
1238 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1239 | wait_for_completion(&io_req->cleanup_done); |
1240 | spin_lock_bh(lock: &tgt->tgt_lock); |
1241 | io_req->wait_for_cleanup_comp = 0; |
1242 | goto done; |
1243 | } |
1244 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1245 | |
1246 | /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */ |
1247 | time_left = wait_for_completion_timeout(x: &io_req->abts_done, |
1248 | timeout: msecs_to_jiffies(m: 2 * rp->r_a_tov + 1)); |
1249 | if (time_left) |
1250 | BNX2FC_IO_DBG(io_req, |
1251 | fmt: "Timed out in eh_abort waiting for abts_done" ); |
1252 | |
1253 | spin_lock_bh(lock: &tgt->tgt_lock); |
1254 | io_req->wait_for_abts_comp = 0; |
1255 | if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { |
1256 | BNX2FC_IO_DBG(io_req, fmt: "IO completed in a different context\n" ); |
1257 | rc = SUCCESS; |
1258 | } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
1259 | addr: &io_req->req_flags))) { |
1260 | /* Let the scsi-ml try to recover this command */ |
1261 | printk(KERN_ERR PFX "abort failed, xid = 0x%x\n" , |
1262 | io_req->xid); |
1263 | /* |
1264 | * Cleanup firmware residuals before returning control back |
1265 | * to SCSI ML. |
1266 | */ |
1267 | rc = bnx2fc_abts_cleanup(io_req); |
1268 | goto done; |
1269 | } else { |
1270 | /* |
1271 | * We come here even when there was a race condition |
1272 | * between timeout and abts completion, and abts |
1273 | * completion happens just in time. |
1274 | */ |
1275 | BNX2FC_IO_DBG(io_req, fmt: "abort succeeded\n" ); |
1276 | rc = SUCCESS; |
1277 | bnx2fc_scsi_done(io_req, err_code: DID_ABORT); |
1278 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1279 | } |
1280 | done: |
1281 | /* release the reference taken in eh_abort */ |
1282 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1283 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1284 | return rc; |
1285 | } |
1286 | |
1287 | void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, |
1288 | struct fcoe_task_ctx_entry *task, |
1289 | u8 rx_state) |
1290 | { |
1291 | struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; |
1292 | struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; |
1293 | u32 offset = cb_arg->offset; |
1294 | enum fc_rctl r_ctl = cb_arg->r_ctl; |
1295 | int rc = 0; |
1296 | struct bnx2fc_rport *tgt = orig_io_req->tgt; |
1297 | |
1298 | BNX2FC_IO_DBG(io_req: orig_io_req, fmt: "Entered process_cleanup_compl xid = 0x%x" |
1299 | "cmd_type = %d\n" , |
1300 | seq_clnp_req->xid, seq_clnp_req->cmd_type); |
1301 | |
1302 | if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { |
1303 | printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n" , |
1304 | seq_clnp_req->xid); |
1305 | goto free_cb_arg; |
1306 | } |
1307 | |
1308 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1309 | rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); |
1310 | spin_lock_bh(lock: &tgt->tgt_lock); |
1311 | |
1312 | if (rc) |
1313 | printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" |
1314 | " IO will abort\n" ); |
1315 | seq_clnp_req->cb_arg = NULL; |
1316 | kref_put(kref: &orig_io_req->refcount, release: bnx2fc_cmd_release); |
1317 | free_cb_arg: |
1318 | kfree(objp: cb_arg); |
1319 | return; |
1320 | } |
1321 | |
1322 | void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, |
1323 | struct fcoe_task_ctx_entry *task, |
1324 | u8 num_rq) |
1325 | { |
1326 | BNX2FC_IO_DBG(io_req, fmt: "Entered process_cleanup_compl " |
1327 | "refcnt = %d, cmd_type = %d\n" , |
1328 | kref_read(kref: &io_req->refcount), io_req->cmd_type); |
1329 | /* |
1330 | * Test whether there is a cleanup request pending. If not just |
1331 | * exit. |
1332 | */ |
1333 | if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, |
1334 | addr: &io_req->req_flags)) |
1335 | return; |
1336 | /* |
1337 | * If we receive a cleanup completion for this request then the |
1338 | * firmware will not give us an abort completion for this request |
1339 | * so clear any ABTS pending flags. |
1340 | */ |
1341 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) && |
1342 | !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) { |
1343 | set_bit(BNX2FC_FLAG_ABTS_DONE, addr: &io_req->req_flags); |
1344 | if (io_req->wait_for_abts_comp) |
1345 | complete(&io_req->abts_done); |
1346 | } |
1347 | |
1348 | bnx2fc_scsi_done(io_req, err_code: DID_ERROR); |
1349 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1350 | if (io_req->wait_for_cleanup_comp) |
1351 | complete(&io_req->cleanup_done); |
1352 | } |
1353 | |
1354 | void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, |
1355 | struct fcoe_task_ctx_entry *task, |
1356 | u8 num_rq) |
1357 | { |
1358 | u32 r_ctl; |
1359 | u32 r_a_tov = FC_DEF_R_A_TOV; |
1360 | u8 issue_rrq = 0; |
1361 | struct bnx2fc_rport *tgt = io_req->tgt; |
1362 | |
1363 | BNX2FC_IO_DBG(io_req, fmt: "Entered process_abts_compl xid = 0x%x" |
1364 | "refcnt = %d, cmd_type = %d\n" , |
1365 | io_req->xid, |
1366 | kref_read(kref: &io_req->refcount), io_req->cmd_type); |
1367 | |
1368 | if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
1369 | addr: &io_req->req_flags)) { |
1370 | BNX2FC_IO_DBG(io_req, fmt: "Timer context finished processing" |
1371 | " this io\n" ); |
1372 | return; |
1373 | } |
1374 | |
1375 | /* |
1376 | * If we receive an ABTS completion here then we will not receive |
1377 | * a cleanup completion so clear any cleanup pending flags. |
1378 | */ |
1379 | if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) { |
1380 | clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, addr: &io_req->req_flags); |
1381 | if (io_req->wait_for_cleanup_comp) |
1382 | complete(&io_req->cleanup_done); |
1383 | } |
1384 | |
1385 | /* Do not issue RRQ as this IO is already cleanedup */ |
1386 | if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, |
1387 | addr: &io_req->req_flags)) |
1388 | goto io_compl; |
1389 | |
1390 | /* |
1391 | * For ABTS issued due to SCSI eh_abort_handler, timeout |
1392 | * values are maintained by scsi-ml itself. Cancel timeout |
1393 | * in case ABTS issued as part of task management function |
1394 | * or due to FW error. |
1395 | */ |
1396 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) |
1397 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1398 | kref_put(kref: &io_req->refcount, |
1399 | release: bnx2fc_cmd_release); /* drop timer hold */ |
1400 | |
1401 | r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; |
1402 | |
1403 | switch (r_ctl) { |
1404 | case FC_RCTL_BA_ACC: |
1405 | /* |
1406 | * Dont release this cmd yet. It will be relesed |
1407 | * after we get RRQ response |
1408 | */ |
1409 | BNX2FC_IO_DBG(io_req, fmt: "ABTS response - ACC Send RRQ\n" ); |
1410 | issue_rrq = 1; |
1411 | break; |
1412 | |
1413 | case FC_RCTL_BA_RJT: |
1414 | BNX2FC_IO_DBG(io_req, fmt: "ABTS response - RJT\n" ); |
1415 | break; |
1416 | default: |
1417 | printk(KERN_ERR PFX "Unknown ABTS response\n" ); |
1418 | break; |
1419 | } |
1420 | |
1421 | if (issue_rrq) { |
1422 | BNX2FC_IO_DBG(io_req, fmt: "Issue RRQ after R_A_TOV\n" ); |
1423 | set_bit(BNX2FC_FLAG_ISSUE_RRQ, addr: &io_req->req_flags); |
1424 | } |
1425 | set_bit(BNX2FC_FLAG_RETIRE_OXID, addr: &io_req->req_flags); |
1426 | bnx2fc_cmd_timer_set(io_req, timer_msec: r_a_tov); |
1427 | |
1428 | io_compl: |
1429 | if (io_req->wait_for_abts_comp) { |
1430 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, |
1431 | addr: &io_req->req_flags)) |
1432 | complete(&io_req->abts_done); |
1433 | } else { |
1434 | /* |
1435 | * We end up here when ABTS is issued as |
1436 | * in asynchronous context, i.e., as part |
1437 | * of task management completion, or |
1438 | * when FW error is received or when the |
1439 | * ABTS is issued when the IO is timed |
1440 | * out. |
1441 | */ |
1442 | |
1443 | if (io_req->on_active_queue) { |
1444 | list_del_init(entry: &io_req->link); |
1445 | io_req->on_active_queue = 0; |
1446 | /* Move IO req to retire queue */ |
1447 | list_add_tail(new: &io_req->link, head: &tgt->io_retire_queue); |
1448 | } |
1449 | bnx2fc_scsi_done(io_req, err_code: DID_ERROR); |
1450 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1451 | } |
1452 | } |
1453 | |
1454 | static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) |
1455 | { |
1456 | struct bnx2fc_rport *tgt = io_req->tgt; |
1457 | struct bnx2fc_cmd *cmd, *tmp; |
1458 | struct bnx2fc_mp_req *tm_req = &io_req->mp_req; |
1459 | u64 lun; |
1460 | int rc = 0; |
1461 | |
1462 | /* called with tgt_lock held */ |
1463 | BNX2FC_IO_DBG(io_req, fmt: "Entered bnx2fc_lun_reset_cmpl\n" ); |
1464 | /* |
1465 | * Walk thru the active_ios queue and ABORT the IO |
1466 | * that matches with the LUN that was reset |
1467 | */ |
1468 | list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { |
1469 | BNX2FC_TGT_DBG(tgt, fmt: "LUN RST cmpl: scan for pending IOs\n" ); |
1470 | if (!cmd->sc_cmd) |
1471 | continue; |
1472 | lun = cmd->sc_cmd->device->lun; |
1473 | if (lun == tm_req->tm_lun) { |
1474 | /* Initiate ABTS on this cmd */ |
1475 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
1476 | addr: &cmd->req_flags)) { |
1477 | /* cancel the IO timeout */ |
1478 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1479 | kref_put(kref: &io_req->refcount, |
1480 | release: bnx2fc_cmd_release); |
1481 | /* timer hold */ |
1482 | rc = bnx2fc_initiate_abts(io_req: cmd); |
1483 | /* abts shouldn't fail in this context */ |
1484 | WARN_ON(rc != SUCCESS); |
1485 | } else |
1486 | printk(KERN_ERR PFX "lun_rst: abts already in" |
1487 | " progress for this IO 0x%x\n" , |
1488 | cmd->xid); |
1489 | } |
1490 | } |
1491 | } |
1492 | |
1493 | static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) |
1494 | { |
1495 | struct bnx2fc_rport *tgt = io_req->tgt; |
1496 | struct bnx2fc_cmd *cmd, *tmp; |
1497 | int rc = 0; |
1498 | |
1499 | /* called with tgt_lock held */ |
1500 | BNX2FC_IO_DBG(io_req, fmt: "Entered bnx2fc_tgt_reset_cmpl\n" ); |
1501 | /* |
1502 | * Walk thru the active_ios queue and ABORT the IO |
1503 | * that matches with the LUN that was reset |
1504 | */ |
1505 | list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { |
1506 | BNX2FC_TGT_DBG(tgt, fmt: "TGT RST cmpl: scan for pending IOs\n" ); |
1507 | /* Initiate ABTS */ |
1508 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
1509 | addr: &cmd->req_flags)) { |
1510 | /* cancel the IO timeout */ |
1511 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1512 | kref_put(kref: &io_req->refcount, |
1513 | release: bnx2fc_cmd_release); /* timer hold */ |
1514 | rc = bnx2fc_initiate_abts(io_req: cmd); |
1515 | /* abts shouldn't fail in this context */ |
1516 | WARN_ON(rc != SUCCESS); |
1517 | |
1518 | } else |
1519 | printk(KERN_ERR PFX "tgt_rst: abts already in progress" |
1520 | " for this IO 0x%x\n" , cmd->xid); |
1521 | } |
1522 | } |
1523 | |
1524 | void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, |
1525 | struct fcoe_task_ctx_entry *task, u8 num_rq, |
1526 | unsigned char *rq_data) |
1527 | { |
1528 | struct bnx2fc_mp_req *tm_req; |
1529 | struct fc_frame_header *fc_hdr; |
1530 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
1531 | u64 *hdr; |
1532 | u64 *temp_hdr; |
1533 | void *rsp_buf; |
1534 | |
1535 | /* Called with tgt_lock held */ |
1536 | BNX2FC_IO_DBG(io_req, fmt: "Entered process_tm_compl\n" ); |
1537 | |
1538 | if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) |
1539 | set_bit(BNX2FC_FLAG_TM_COMPL, addr: &io_req->req_flags); |
1540 | else { |
1541 | /* TM has already timed out and we got |
1542 | * delayed completion. Ignore completion |
1543 | * processing. |
1544 | */ |
1545 | return; |
1546 | } |
1547 | |
1548 | tm_req = &(io_req->mp_req); |
1549 | fc_hdr = &(tm_req->resp_fc_hdr); |
1550 | hdr = (u64 *)fc_hdr; |
1551 | temp_hdr = (u64 *) |
1552 | &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; |
1553 | hdr[0] = cpu_to_be64(temp_hdr[0]); |
1554 | hdr[1] = cpu_to_be64(temp_hdr[1]); |
1555 | hdr[2] = cpu_to_be64(temp_hdr[2]); |
1556 | |
1557 | tm_req->resp_len = |
1558 | task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; |
1559 | |
1560 | rsp_buf = tm_req->resp_buf; |
1561 | |
1562 | if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { |
1563 | bnx2fc_parse_fcp_rsp(io_req, |
1564 | fcp_rsp: (struct fcoe_fcp_rsp_payload *) |
1565 | rsp_buf, num_rq, rq_data); |
1566 | if (io_req->fcp_rsp_code == 0) { |
1567 | /* TM successful */ |
1568 | if (tm_req->tm_flags & FCP_TMF_LUN_RESET) |
1569 | bnx2fc_lun_reset_cmpl(io_req); |
1570 | else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) |
1571 | bnx2fc_tgt_reset_cmpl(io_req); |
1572 | } |
1573 | } else { |
1574 | printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n" , |
1575 | fc_hdr->fh_r_ctl); |
1576 | } |
1577 | if (sc_cmd) { |
1578 | if (!bnx2fc_priv(cmd: sc_cmd)->io_req) { |
1579 | printk(KERN_ERR PFX "tm_compl: io_req is NULL\n" ); |
1580 | return; |
1581 | } |
1582 | switch (io_req->fcp_status) { |
1583 | case FC_GOOD: |
1584 | if (io_req->cdb_status == 0) { |
1585 | /* Good IO completion */ |
1586 | sc_cmd->result = DID_OK << 16; |
1587 | } else { |
1588 | /* Transport status is good, SCSI status not good */ |
1589 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; |
1590 | } |
1591 | if (io_req->fcp_resid) |
1592 | scsi_set_resid(cmd: sc_cmd, resid: io_req->fcp_resid); |
1593 | break; |
1594 | |
1595 | default: |
1596 | BNX2FC_IO_DBG(io_req, fmt: "process_tm_compl: fcp_status = %d\n" , |
1597 | io_req->fcp_status); |
1598 | break; |
1599 | } |
1600 | |
1601 | sc_cmd = io_req->sc_cmd; |
1602 | io_req->sc_cmd = NULL; |
1603 | |
1604 | bnx2fc_priv(cmd: sc_cmd)->io_req = NULL; |
1605 | scsi_done(cmd: sc_cmd); |
1606 | } |
1607 | |
1608 | /* check if the io_req exists in tgt's tmf_q */ |
1609 | if (io_req->on_tmf_queue) { |
1610 | |
1611 | list_del_init(entry: &io_req->link); |
1612 | io_req->on_tmf_queue = 0; |
1613 | } else { |
1614 | |
1615 | printk(KERN_ERR PFX "Command not on active_cmd_queue!\n" ); |
1616 | return; |
1617 | } |
1618 | |
1619 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
1620 | if (io_req->wait_for_abts_comp) { |
1621 | BNX2FC_IO_DBG(io_req, fmt: "tm_compl - wake up the waiter\n" ); |
1622 | complete(&io_req->abts_done); |
1623 | } |
1624 | } |
1625 | |
1626 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, |
1627 | int bd_index) |
1628 | { |
1629 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
1630 | int frag_size, sg_frags; |
1631 | |
1632 | sg_frags = 0; |
1633 | while (sg_len) { |
1634 | if (sg_len >= BNX2FC_BD_SPLIT_SZ) |
1635 | frag_size = BNX2FC_BD_SPLIT_SZ; |
1636 | else |
1637 | frag_size = sg_len; |
1638 | bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; |
1639 | bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; |
1640 | bd[bd_index + sg_frags].buf_len = (u16)frag_size; |
1641 | bd[bd_index + sg_frags].flags = 0; |
1642 | |
1643 | addr += (u64) frag_size; |
1644 | sg_frags++; |
1645 | sg_len -= frag_size; |
1646 | } |
1647 | return sg_frags; |
1648 | |
1649 | } |
1650 | |
1651 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) |
1652 | { |
1653 | struct bnx2fc_interface *interface = io_req->port->priv; |
1654 | struct bnx2fc_hba *hba = interface->hba; |
1655 | struct scsi_cmnd *sc = io_req->sc_cmd; |
1656 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
1657 | struct scatterlist *sg; |
1658 | int byte_count = 0; |
1659 | int sg_count = 0; |
1660 | int bd_count = 0; |
1661 | int sg_frags; |
1662 | unsigned int sg_len; |
1663 | u64 addr; |
1664 | int i; |
1665 | |
1666 | WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD); |
1667 | /* |
1668 | * Use dma_map_sg directly to ensure we're using the correct |
1669 | * dev struct off of pcidev. |
1670 | */ |
1671 | sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), |
1672 | scsi_sg_count(sc), sc->sc_data_direction); |
1673 | scsi_for_each_sg(sc, sg, sg_count, i) { |
1674 | sg_len = sg_dma_len(sg); |
1675 | addr = sg_dma_address(sg); |
1676 | if (sg_len > BNX2FC_MAX_BD_LEN) { |
1677 | sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, |
1678 | bd_index: bd_count); |
1679 | } else { |
1680 | |
1681 | sg_frags = 1; |
1682 | bd[bd_count].buf_addr_lo = addr & 0xffffffff; |
1683 | bd[bd_count].buf_addr_hi = addr >> 32; |
1684 | bd[bd_count].buf_len = (u16)sg_len; |
1685 | bd[bd_count].flags = 0; |
1686 | } |
1687 | bd_count += sg_frags; |
1688 | byte_count += sg_len; |
1689 | } |
1690 | if (byte_count != scsi_bufflen(cmd: sc)) |
1691 | printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " |
1692 | "task_id = 0x%x\n" , byte_count, scsi_bufflen(sc), |
1693 | io_req->xid); |
1694 | return bd_count; |
1695 | } |
1696 | |
1697 | static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) |
1698 | { |
1699 | struct scsi_cmnd *sc = io_req->sc_cmd; |
1700 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
1701 | int bd_count; |
1702 | |
1703 | if (scsi_sg_count(cmd: sc)) { |
1704 | bd_count = bnx2fc_map_sg(io_req); |
1705 | if (bd_count == 0) |
1706 | return -ENOMEM; |
1707 | } else { |
1708 | bd_count = 0; |
1709 | bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; |
1710 | bd[0].buf_len = bd[0].flags = 0; |
1711 | } |
1712 | io_req->bd_tbl->bd_valid = bd_count; |
1713 | |
1714 | /* |
1715 | * Return the command to ML if BD count exceeds the max number |
1716 | * that can be handled by FW. |
1717 | */ |
1718 | if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) { |
1719 | pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n" , |
1720 | bd_count, io_req->xid); |
1721 | return -ENOMEM; |
1722 | } |
1723 | |
1724 | return 0; |
1725 | } |
1726 | |
1727 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) |
1728 | { |
1729 | struct scsi_cmnd *sc = io_req->sc_cmd; |
1730 | struct bnx2fc_interface *interface = io_req->port->priv; |
1731 | struct bnx2fc_hba *hba = interface->hba; |
1732 | |
1733 | /* |
1734 | * Use dma_unmap_sg directly to ensure we're using the correct |
1735 | * dev struct off of pcidev. |
1736 | */ |
1737 | if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(cmd: sc)) { |
1738 | dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), |
1739 | scsi_sg_count(sc), sc->sc_data_direction); |
1740 | io_req->bd_tbl->bd_valid = 0; |
1741 | } |
1742 | } |
1743 | |
1744 | void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, |
1745 | struct fcp_cmnd *fcp_cmnd) |
1746 | { |
1747 | memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); |
1748 | |
1749 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); |
1750 | fcp_cmnd->fc_cmdref = 0; |
1751 | fcp_cmnd->fc_pri_ta = 0; |
1752 | fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; |
1753 | fcp_cmnd->fc_flags = io_req->io_req_flags; |
1754 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; |
1755 | } |
1756 | |
1757 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, |
1758 | struct fcoe_fcp_rsp_payload *fcp_rsp, |
1759 | u8 num_rq, unsigned char *rq_data) |
1760 | { |
1761 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
1762 | u8 rsp_flags = fcp_rsp->fcp_flags.flags; |
1763 | u32 rq_buff_len = 0; |
1764 | int fcp_sns_len = 0; |
1765 | int fcp_rsp_len = 0; |
1766 | |
1767 | io_req->fcp_status = FC_GOOD; |
1768 | io_req->fcp_resid = 0; |
1769 | if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | |
1770 | FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) |
1771 | io_req->fcp_resid = fcp_rsp->fcp_resid; |
1772 | |
1773 | io_req->scsi_comp_flags = rsp_flags; |
1774 | io_req->cdb_status = fcp_rsp->scsi_status_code; |
1775 | |
1776 | /* Fetch fcp_rsp_info and fcp_sns_info if available */ |
1777 | if (num_rq) { |
1778 | |
1779 | /* |
1780 | * We do not anticipate num_rq >1, as the linux defined |
1781 | * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO |
1782 | * 256 bytes of single rq buffer is good enough to hold this. |
1783 | */ |
1784 | |
1785 | if (rsp_flags & |
1786 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { |
1787 | fcp_rsp_len = rq_buff_len |
1788 | = fcp_rsp->fcp_rsp_len; |
1789 | } |
1790 | |
1791 | if (rsp_flags & |
1792 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { |
1793 | fcp_sns_len = fcp_rsp->fcp_sns_len; |
1794 | rq_buff_len += fcp_rsp->fcp_sns_len; |
1795 | } |
1796 | |
1797 | io_req->fcp_rsp_len = fcp_rsp_len; |
1798 | io_req->fcp_sns_len = fcp_sns_len; |
1799 | |
1800 | if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { |
1801 | /* Invalid sense sense length. */ |
1802 | printk(KERN_ERR PFX "invalid sns length %d\n" , |
1803 | rq_buff_len); |
1804 | /* reset rq_buff_len */ |
1805 | rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; |
1806 | } |
1807 | |
1808 | /* fetch fcp_rsp_code */ |
1809 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { |
1810 | /* Only for task management function */ |
1811 | io_req->fcp_rsp_code = rq_data[3]; |
1812 | BNX2FC_IO_DBG(io_req, fmt: "fcp_rsp_code = %d\n" , |
1813 | io_req->fcp_rsp_code); |
1814 | } |
1815 | |
1816 | /* fetch sense data */ |
1817 | rq_data += fcp_rsp_len; |
1818 | |
1819 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { |
1820 | printk(KERN_ERR PFX "Truncating sense buffer\n" ); |
1821 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; |
1822 | } |
1823 | |
1824 | memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
1825 | if (fcp_sns_len) |
1826 | memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); |
1827 | |
1828 | } |
1829 | } |
1830 | |
1831 | /** |
1832 | * bnx2fc_queuecommand - Queuecommand function of the scsi template |
1833 | * |
1834 | * @host: The Scsi_Host the command was issued to |
1835 | * @sc_cmd: struct scsi_cmnd to be executed |
1836 | * |
1837 | * This is the IO strategy routine, called by SCSI-ML |
1838 | **/ |
1839 | int bnx2fc_queuecommand(struct Scsi_Host *host, |
1840 | struct scsi_cmnd *sc_cmd) |
1841 | { |
1842 | struct fc_lport *lport = shost_priv(shost: host); |
1843 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
1844 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
1845 | struct bnx2fc_rport *tgt; |
1846 | struct bnx2fc_cmd *io_req; |
1847 | int rc = 0; |
1848 | int rval; |
1849 | |
1850 | rval = fc_remote_port_chkready(rport); |
1851 | if (rval) { |
1852 | sc_cmd->result = rval; |
1853 | scsi_done(cmd: sc_cmd); |
1854 | return 0; |
1855 | } |
1856 | |
1857 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { |
1858 | rc = SCSI_MLQUEUE_HOST_BUSY; |
1859 | goto exit_qcmd; |
1860 | } |
1861 | |
1862 | /* rport and tgt are allocated together, so tgt should be non-NULL */ |
1863 | tgt = (struct bnx2fc_rport *)&rp[1]; |
1864 | |
1865 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
1866 | /* |
1867 | * Session is not offloaded yet. Let SCSI-ml retry |
1868 | * the command. |
1869 | */ |
1870 | rc = SCSI_MLQUEUE_TARGET_BUSY; |
1871 | goto exit_qcmd; |
1872 | } |
1873 | if (tgt->retry_delay_timestamp) { |
1874 | if (time_after(jiffies, tgt->retry_delay_timestamp)) { |
1875 | tgt->retry_delay_timestamp = 0; |
1876 | } else { |
1877 | /* If retry_delay timer is active, flow off the ML */ |
1878 | rc = SCSI_MLQUEUE_TARGET_BUSY; |
1879 | goto exit_qcmd; |
1880 | } |
1881 | } |
1882 | |
1883 | spin_lock_bh(lock: &tgt->tgt_lock); |
1884 | |
1885 | io_req = bnx2fc_cmd_alloc(tgt); |
1886 | if (!io_req) { |
1887 | rc = SCSI_MLQUEUE_HOST_BUSY; |
1888 | goto exit_qcmd_tgtlock; |
1889 | } |
1890 | io_req->sc_cmd = sc_cmd; |
1891 | |
1892 | if (bnx2fc_post_io_req(tgt, io_req)) { |
1893 | printk(KERN_ERR PFX "Unable to post io_req\n" ); |
1894 | rc = SCSI_MLQUEUE_HOST_BUSY; |
1895 | goto exit_qcmd_tgtlock; |
1896 | } |
1897 | |
1898 | exit_qcmd_tgtlock: |
1899 | spin_unlock_bh(lock: &tgt->tgt_lock); |
1900 | exit_qcmd: |
1901 | return rc; |
1902 | } |
1903 | |
1904 | void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, |
1905 | struct fcoe_task_ctx_entry *task, |
1906 | u8 num_rq, unsigned char *rq_data) |
1907 | { |
1908 | struct fcoe_fcp_rsp_payload *fcp_rsp; |
1909 | struct bnx2fc_rport *tgt = io_req->tgt; |
1910 | struct scsi_cmnd *sc_cmd; |
1911 | u16 scope = 0, qualifier = 0; |
1912 | |
1913 | /* scsi_cmd_cmpl is called with tgt lock held */ |
1914 | |
1915 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, addr: &io_req->req_flags)) { |
1916 | /* we will not receive ABTS response for this IO */ |
1917 | BNX2FC_IO_DBG(io_req, fmt: "Timer context finished processing " |
1918 | "this scsi cmd\n" ); |
1919 | if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP, |
1920 | addr: &io_req->req_flags)) { |
1921 | BNX2FC_IO_DBG(io_req, |
1922 | fmt: "Actual completion after cleanup request cleaning up\n" ); |
1923 | bnx2fc_process_cleanup_compl(io_req, task, num_rq); |
1924 | } |
1925 | return; |
1926 | } |
1927 | |
1928 | /* Cancel the timeout_work, as we received IO completion */ |
1929 | if (cancel_delayed_work(dwork: &io_req->timeout_work)) |
1930 | kref_put(kref: &io_req->refcount, |
1931 | release: bnx2fc_cmd_release); /* drop timer hold */ |
1932 | |
1933 | sc_cmd = io_req->sc_cmd; |
1934 | if (sc_cmd == NULL) { |
1935 | printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n" ); |
1936 | return; |
1937 | } |
1938 | |
1939 | /* Fetch fcp_rsp from task context and perform cmd completion */ |
1940 | fcp_rsp = (struct fcoe_fcp_rsp_payload *) |
1941 | &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); |
1942 | |
1943 | /* parse fcp_rsp and obtain sense data from RQ if available */ |
1944 | bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data); |
1945 | |
1946 | if (!bnx2fc_priv(cmd: sc_cmd)->io_req) { |
1947 | printk(KERN_ERR PFX "io_req is NULL\n" ); |
1948 | return; |
1949 | } |
1950 | |
1951 | if (io_req->on_active_queue) { |
1952 | list_del_init(entry: &io_req->link); |
1953 | io_req->on_active_queue = 0; |
1954 | /* Move IO req to retire queue */ |
1955 | list_add_tail(new: &io_req->link, head: &tgt->io_retire_queue); |
1956 | } else { |
1957 | /* This should not happen, but could have been pulled |
1958 | * by bnx2fc_flush_active_ios(), or during a race |
1959 | * between command abort and (late) completion. |
1960 | */ |
1961 | BNX2FC_IO_DBG(io_req, fmt: "xid not on active_cmd_queue\n" ); |
1962 | if (io_req->wait_for_abts_comp) |
1963 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, |
1964 | addr: &io_req->req_flags)) |
1965 | complete(&io_req->abts_done); |
1966 | } |
1967 | |
1968 | bnx2fc_unmap_sg_list(io_req); |
1969 | io_req->sc_cmd = NULL; |
1970 | |
1971 | switch (io_req->fcp_status) { |
1972 | case FC_GOOD: |
1973 | if (io_req->cdb_status == 0) { |
1974 | /* Good IO completion */ |
1975 | sc_cmd->result = DID_OK << 16; |
1976 | } else { |
1977 | /* Transport status is good, SCSI status not good */ |
1978 | BNX2FC_IO_DBG(io_req, fmt: "scsi_cmpl: cdb_status = %d" |
1979 | " fcp_resid = 0x%x\n" , |
1980 | io_req->cdb_status, io_req->fcp_resid); |
1981 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; |
1982 | |
1983 | if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || |
1984 | io_req->cdb_status == SAM_STAT_BUSY) { |
1985 | /* Newer array firmware with BUSY or |
1986 | * TASK_SET_FULL may return a status that needs |
1987 | * the scope bits masked. |
1988 | * Or a huge delay timestamp up to 27 minutes |
1989 | * can result. |
1990 | */ |
1991 | if (fcp_rsp->retry_delay_timer) { |
1992 | /* Upper 2 bits */ |
1993 | scope = fcp_rsp->retry_delay_timer |
1994 | & 0xC000; |
1995 | /* Lower 14 bits */ |
1996 | qualifier = fcp_rsp->retry_delay_timer |
1997 | & 0x3FFF; |
1998 | } |
1999 | if (scope > 0 && qualifier > 0 && |
2000 | qualifier <= 0x3FEF) { |
2001 | /* Set the jiffies + |
2002 | * retry_delay_timer * 100ms |
2003 | * for the rport/tgt |
2004 | */ |
2005 | tgt->retry_delay_timestamp = jiffies + |
2006 | (qualifier * HZ / 10); |
2007 | } |
2008 | } |
2009 | } |
2010 | if (io_req->fcp_resid) |
2011 | scsi_set_resid(cmd: sc_cmd, resid: io_req->fcp_resid); |
2012 | break; |
2013 | default: |
2014 | printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n" , |
2015 | io_req->fcp_status); |
2016 | break; |
2017 | } |
2018 | bnx2fc_priv(cmd: sc_cmd)->io_req = NULL; |
2019 | scsi_done(cmd: sc_cmd); |
2020 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
2021 | } |
2022 | |
2023 | int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, |
2024 | struct bnx2fc_cmd *io_req) |
2025 | { |
2026 | struct fcoe_task_ctx_entry *task; |
2027 | struct fcoe_task_ctx_entry *task_page; |
2028 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
2029 | struct fcoe_port *port = tgt->port; |
2030 | struct bnx2fc_interface *interface = port->priv; |
2031 | struct bnx2fc_hba *hba = interface->hba; |
2032 | struct fc_lport *lport = port->lport; |
2033 | int task_idx, index; |
2034 | u16 xid; |
2035 | |
2036 | /* bnx2fc_post_io_req() is called with the tgt_lock held */ |
2037 | |
2038 | /* Initialize rest of io_req fields */ |
2039 | io_req->cmd_type = BNX2FC_SCSI_CMD; |
2040 | io_req->port = port; |
2041 | io_req->tgt = tgt; |
2042 | io_req->data_xfer_len = scsi_bufflen(cmd: sc_cmd); |
2043 | bnx2fc_priv(cmd: sc_cmd)->io_req = io_req; |
2044 | |
2045 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { |
2046 | io_req->io_req_flags = BNX2FC_READ; |
2047 | this_cpu_inc(lport->stats->InputRequests); |
2048 | this_cpu_add(lport->stats->InputBytes, io_req->data_xfer_len); |
2049 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
2050 | io_req->io_req_flags = BNX2FC_WRITE; |
2051 | this_cpu_inc(lport->stats->OutputRequests); |
2052 | this_cpu_add(lport->stats->OutputBytes, io_req->data_xfer_len); |
2053 | } else { |
2054 | io_req->io_req_flags = 0; |
2055 | this_cpu_inc(lport->stats->ControlRequests); |
2056 | } |
2057 | |
2058 | xid = io_req->xid; |
2059 | |
2060 | /* Build buffer descriptor list for firmware from sg list */ |
2061 | if (bnx2fc_build_bd_list_from_sg(io_req)) { |
2062 | printk(KERN_ERR PFX "BD list creation failed\n" ); |
2063 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
2064 | return -EAGAIN; |
2065 | } |
2066 | |
2067 | task_idx = xid / BNX2FC_TASKS_PER_PAGE; |
2068 | index = xid % BNX2FC_TASKS_PER_PAGE; |
2069 | |
2070 | /* Initialize task context for this IO request */ |
2071 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; |
2072 | task = &(task_page[index]); |
2073 | bnx2fc_init_task(io_req, task); |
2074 | |
2075 | if (tgt->flush_in_prog) { |
2076 | printk(KERN_ERR PFX "Flush in progress..Host Busy\n" ); |
2077 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
2078 | return -EAGAIN; |
2079 | } |
2080 | |
2081 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
2082 | printk(KERN_ERR PFX "Session not ready...post_io\n" ); |
2083 | kref_put(kref: &io_req->refcount, release: bnx2fc_cmd_release); |
2084 | return -EAGAIN; |
2085 | } |
2086 | |
2087 | /* Time IO req */ |
2088 | if (tgt->io_timeout) |
2089 | bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); |
2090 | /* Obtain free SQ entry */ |
2091 | bnx2fc_add_2_sq(tgt, xid); |
2092 | |
2093 | /* Enqueue the io_req to active_cmd_queue */ |
2094 | |
2095 | io_req->on_active_queue = 1; |
2096 | /* move io_req from pending_queue to active_queue */ |
2097 | list_add_tail(new: &io_req->link, head: &tgt->active_cmd_queue); |
2098 | |
2099 | /* Ring doorbell */ |
2100 | bnx2fc_ring_doorbell(tgt); |
2101 | return 0; |
2102 | } |
2103 | |