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e399441d JS |
1 | /* |
2 | * Copyright (c) 2016 Avago Technologies. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful. | |
9 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
10 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
11 | * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO | |
12 | * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. | |
13 | * See the GNU General Public License for more details, a copy of which | |
14 | * can be found in the file COPYING included with this package | |
15 | * | |
16 | */ | |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
18 | #include <linux/module.h> | |
19 | #include <linux/parser.h> | |
20 | #include <uapi/scsi/fc/fc_fs.h> | |
21 | #include <uapi/scsi/fc/fc_els.h> | |
61bff8ef | 22 | #include <linux/delay.h> |
e399441d JS |
23 | |
24 | #include "nvme.h" | |
25 | #include "fabrics.h" | |
26 | #include <linux/nvme-fc-driver.h> | |
27 | #include <linux/nvme-fc.h> | |
28 | ||
29 | ||
30 | /* *************************** Data Structures/Defines ****************** */ | |
31 | ||
32 | ||
33 | /* | |
34 | * We handle AEN commands ourselves and don't even let the | |
35 | * block layer know about them. | |
36 | */ | |
37 | #define NVME_FC_NR_AEN_COMMANDS 1 | |
38 | #define NVME_FC_AQ_BLKMQ_DEPTH \ | |
7aa1f427 | 39 | (NVME_AQ_DEPTH - NVME_FC_NR_AEN_COMMANDS) |
e399441d JS |
40 | #define AEN_CMDID_BASE (NVME_FC_AQ_BLKMQ_DEPTH + 1) |
41 | ||
42 | enum nvme_fc_queue_flags { | |
43 | NVME_FC_Q_CONNECTED = (1 << 0), | |
44 | }; | |
45 | ||
46 | #define NVMEFC_QUEUE_DELAY 3 /* ms units */ | |
47 | ||
48 | struct nvme_fc_queue { | |
49 | struct nvme_fc_ctrl *ctrl; | |
50 | struct device *dev; | |
51 | struct blk_mq_hw_ctx *hctx; | |
52 | void *lldd_handle; | |
53 | int queue_size; | |
54 | size_t cmnd_capsule_len; | |
55 | u32 qnum; | |
56 | u32 rqcnt; | |
57 | u32 seqno; | |
58 | ||
59 | u64 connection_id; | |
60 | atomic_t csn; | |
61 | ||
62 | unsigned long flags; | |
63 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
64 | ||
8d64daf7 JS |
65 | enum nvme_fcop_flags { |
66 | FCOP_FLAGS_TERMIO = (1 << 0), | |
67 | FCOP_FLAGS_RELEASED = (1 << 1), | |
68 | FCOP_FLAGS_COMPLETE = (1 << 2), | |
78a7ac26 | 69 | FCOP_FLAGS_AEN = (1 << 3), |
8d64daf7 JS |
70 | }; |
71 | ||
e399441d JS |
72 | struct nvmefc_ls_req_op { |
73 | struct nvmefc_ls_req ls_req; | |
74 | ||
c913a8b0 | 75 | struct nvme_fc_rport *rport; |
e399441d JS |
76 | struct nvme_fc_queue *queue; |
77 | struct request *rq; | |
8d64daf7 | 78 | u32 flags; |
e399441d JS |
79 | |
80 | int ls_error; | |
81 | struct completion ls_done; | |
c913a8b0 | 82 | struct list_head lsreq_list; /* rport->ls_req_list */ |
e399441d JS |
83 | bool req_queued; |
84 | }; | |
85 | ||
86 | enum nvme_fcpop_state { | |
87 | FCPOP_STATE_UNINIT = 0, | |
88 | FCPOP_STATE_IDLE = 1, | |
89 | FCPOP_STATE_ACTIVE = 2, | |
90 | FCPOP_STATE_ABORTED = 3, | |
78a7ac26 | 91 | FCPOP_STATE_COMPLETE = 4, |
e399441d JS |
92 | }; |
93 | ||
94 | struct nvme_fc_fcp_op { | |
95 | struct nvme_request nreq; /* | |
96 | * nvme/host/core.c | |
97 | * requires this to be | |
98 | * the 1st element in the | |
99 | * private structure | |
100 | * associated with the | |
101 | * request. | |
102 | */ | |
103 | struct nvmefc_fcp_req fcp_req; | |
104 | ||
105 | struct nvme_fc_ctrl *ctrl; | |
106 | struct nvme_fc_queue *queue; | |
107 | struct request *rq; | |
108 | ||
109 | atomic_t state; | |
78a7ac26 | 110 | u32 flags; |
e399441d JS |
111 | u32 rqno; |
112 | u32 nents; | |
113 | ||
114 | struct nvme_fc_cmd_iu cmd_iu; | |
115 | struct nvme_fc_ersp_iu rsp_iu; | |
116 | }; | |
117 | ||
118 | struct nvme_fc_lport { | |
119 | struct nvme_fc_local_port localport; | |
120 | ||
121 | struct ida endp_cnt; | |
122 | struct list_head port_list; /* nvme_fc_port_list */ | |
123 | struct list_head endp_list; | |
124 | struct device *dev; /* physical device for dma */ | |
125 | struct nvme_fc_port_template *ops; | |
126 | struct kref ref; | |
127 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
128 | ||
129 | struct nvme_fc_rport { | |
130 | struct nvme_fc_remote_port remoteport; | |
131 | ||
132 | struct list_head endp_list; /* for lport->endp_list */ | |
133 | struct list_head ctrl_list; | |
c913a8b0 JS |
134 | struct list_head ls_req_list; |
135 | struct device *dev; /* physical device for dma */ | |
136 | struct nvme_fc_lport *lport; | |
e399441d JS |
137 | spinlock_t lock; |
138 | struct kref ref; | |
139 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
140 | ||
61bff8ef JS |
141 | enum nvme_fcctrl_flags { |
142 | FCCTRL_TERMIO = (1 << 0), | |
e399441d JS |
143 | }; |
144 | ||
145 | struct nvme_fc_ctrl { | |
146 | spinlock_t lock; | |
147 | struct nvme_fc_queue *queues; | |
e399441d JS |
148 | struct device *dev; |
149 | struct nvme_fc_lport *lport; | |
150 | struct nvme_fc_rport *rport; | |
61bff8ef | 151 | u32 queue_count; |
e399441d JS |
152 | u32 cnum; |
153 | ||
154 | u64 association_id; | |
155 | ||
156 | u64 cap; | |
157 | ||
158 | struct list_head ctrl_list; /* rport->ctrl_list */ | |
e399441d JS |
159 | |
160 | struct blk_mq_tag_set admin_tag_set; | |
161 | struct blk_mq_tag_set tag_set; | |
162 | ||
163 | struct work_struct delete_work; | |
61bff8ef | 164 | struct delayed_work connect_work; |
61bff8ef | 165 | |
e399441d | 166 | struct kref ref; |
61bff8ef JS |
167 | u32 flags; |
168 | u32 iocnt; | |
e399441d JS |
169 | |
170 | struct nvme_fc_fcp_op aen_ops[NVME_FC_NR_AEN_COMMANDS]; | |
171 | ||
172 | struct nvme_ctrl ctrl; | |
173 | }; | |
174 | ||
175 | static inline struct nvme_fc_ctrl * | |
176 | to_fc_ctrl(struct nvme_ctrl *ctrl) | |
177 | { | |
178 | return container_of(ctrl, struct nvme_fc_ctrl, ctrl); | |
179 | } | |
180 | ||
181 | static inline struct nvme_fc_lport * | |
182 | localport_to_lport(struct nvme_fc_local_port *portptr) | |
183 | { | |
184 | return container_of(portptr, struct nvme_fc_lport, localport); | |
185 | } | |
186 | ||
187 | static inline struct nvme_fc_rport * | |
188 | remoteport_to_rport(struct nvme_fc_remote_port *portptr) | |
189 | { | |
190 | return container_of(portptr, struct nvme_fc_rport, remoteport); | |
191 | } | |
192 | ||
193 | static inline struct nvmefc_ls_req_op * | |
194 | ls_req_to_lsop(struct nvmefc_ls_req *lsreq) | |
195 | { | |
196 | return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); | |
197 | } | |
198 | ||
199 | static inline struct nvme_fc_fcp_op * | |
200 | fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) | |
201 | { | |
202 | return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); | |
203 | } | |
204 | ||
205 | ||
206 | ||
207 | /* *************************** Globals **************************** */ | |
208 | ||
209 | ||
210 | static DEFINE_SPINLOCK(nvme_fc_lock); | |
211 | ||
212 | static LIST_HEAD(nvme_fc_lport_list); | |
213 | static DEFINE_IDA(nvme_fc_local_port_cnt); | |
214 | static DEFINE_IDA(nvme_fc_ctrl_cnt); | |
215 | ||
e399441d JS |
216 | |
217 | ||
218 | ||
219 | /* *********************** FC-NVME Port Management ************************ */ | |
220 | ||
221 | static int __nvme_fc_del_ctrl(struct nvme_fc_ctrl *); | |
222 | static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, | |
223 | struct nvme_fc_queue *, unsigned int); | |
224 | ||
225 | ||
226 | /** | |
227 | * nvme_fc_register_localport - transport entry point called by an | |
228 | * LLDD to register the existence of a NVME | |
229 | * host FC port. | |
230 | * @pinfo: pointer to information about the port to be registered | |
231 | * @template: LLDD entrypoints and operational parameters for the port | |
232 | * @dev: physical hardware device node port corresponds to. Will be | |
233 | * used for DMA mappings | |
234 | * @lport_p: pointer to a local port pointer. Upon success, the routine | |
235 | * will allocate a nvme_fc_local_port structure and place its | |
236 | * address in the local port pointer. Upon failure, local port | |
237 | * pointer will be set to 0. | |
238 | * | |
239 | * Returns: | |
240 | * a completion status. Must be 0 upon success; a negative errno | |
241 | * (ex: -ENXIO) upon failure. | |
242 | */ | |
243 | int | |
244 | nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, | |
245 | struct nvme_fc_port_template *template, | |
246 | struct device *dev, | |
247 | struct nvme_fc_local_port **portptr) | |
248 | { | |
249 | struct nvme_fc_lport *newrec; | |
250 | unsigned long flags; | |
251 | int ret, idx; | |
252 | ||
253 | if (!template->localport_delete || !template->remoteport_delete || | |
254 | !template->ls_req || !template->fcp_io || | |
255 | !template->ls_abort || !template->fcp_abort || | |
256 | !template->max_hw_queues || !template->max_sgl_segments || | |
257 | !template->max_dif_sgl_segments || !template->dma_boundary) { | |
258 | ret = -EINVAL; | |
259 | goto out_reghost_failed; | |
260 | } | |
261 | ||
262 | newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), | |
263 | GFP_KERNEL); | |
264 | if (!newrec) { | |
265 | ret = -ENOMEM; | |
266 | goto out_reghost_failed; | |
267 | } | |
268 | ||
269 | idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); | |
270 | if (idx < 0) { | |
271 | ret = -ENOSPC; | |
272 | goto out_fail_kfree; | |
273 | } | |
274 | ||
275 | if (!get_device(dev) && dev) { | |
276 | ret = -ENODEV; | |
277 | goto out_ida_put; | |
278 | } | |
279 | ||
280 | INIT_LIST_HEAD(&newrec->port_list); | |
281 | INIT_LIST_HEAD(&newrec->endp_list); | |
282 | kref_init(&newrec->ref); | |
283 | newrec->ops = template; | |
284 | newrec->dev = dev; | |
285 | ida_init(&newrec->endp_cnt); | |
286 | newrec->localport.private = &newrec[1]; | |
287 | newrec->localport.node_name = pinfo->node_name; | |
288 | newrec->localport.port_name = pinfo->port_name; | |
289 | newrec->localport.port_role = pinfo->port_role; | |
290 | newrec->localport.port_id = pinfo->port_id; | |
291 | newrec->localport.port_state = FC_OBJSTATE_ONLINE; | |
292 | newrec->localport.port_num = idx; | |
293 | ||
294 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
295 | list_add_tail(&newrec->port_list, &nvme_fc_lport_list); | |
296 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
297 | ||
298 | if (dev) | |
299 | dma_set_seg_boundary(dev, template->dma_boundary); | |
300 | ||
301 | *portptr = &newrec->localport; | |
302 | return 0; | |
303 | ||
304 | out_ida_put: | |
305 | ida_simple_remove(&nvme_fc_local_port_cnt, idx); | |
306 | out_fail_kfree: | |
307 | kfree(newrec); | |
308 | out_reghost_failed: | |
309 | *portptr = NULL; | |
310 | ||
311 | return ret; | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(nvme_fc_register_localport); | |
314 | ||
315 | static void | |
316 | nvme_fc_free_lport(struct kref *ref) | |
317 | { | |
318 | struct nvme_fc_lport *lport = | |
319 | container_of(ref, struct nvme_fc_lport, ref); | |
320 | unsigned long flags; | |
321 | ||
322 | WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); | |
323 | WARN_ON(!list_empty(&lport->endp_list)); | |
324 | ||
325 | /* remove from transport list */ | |
326 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
327 | list_del(&lport->port_list); | |
328 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
329 | ||
330 | /* let the LLDD know we've finished tearing it down */ | |
331 | lport->ops->localport_delete(&lport->localport); | |
332 | ||
333 | ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); | |
334 | ida_destroy(&lport->endp_cnt); | |
335 | ||
336 | put_device(lport->dev); | |
337 | ||
338 | kfree(lport); | |
339 | } | |
340 | ||
341 | static void | |
342 | nvme_fc_lport_put(struct nvme_fc_lport *lport) | |
343 | { | |
344 | kref_put(&lport->ref, nvme_fc_free_lport); | |
345 | } | |
346 | ||
347 | static int | |
348 | nvme_fc_lport_get(struct nvme_fc_lport *lport) | |
349 | { | |
350 | return kref_get_unless_zero(&lport->ref); | |
351 | } | |
352 | ||
353 | /** | |
354 | * nvme_fc_unregister_localport - transport entry point called by an | |
355 | * LLDD to deregister/remove a previously | |
356 | * registered a NVME host FC port. | |
357 | * @localport: pointer to the (registered) local port that is to be | |
358 | * deregistered. | |
359 | * | |
360 | * Returns: | |
361 | * a completion status. Must be 0 upon success; a negative errno | |
362 | * (ex: -ENXIO) upon failure. | |
363 | */ | |
364 | int | |
365 | nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) | |
366 | { | |
367 | struct nvme_fc_lport *lport = localport_to_lport(portptr); | |
368 | unsigned long flags; | |
369 | ||
370 | if (!portptr) | |
371 | return -EINVAL; | |
372 | ||
373 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
374 | ||
375 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
376 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
377 | return -EINVAL; | |
378 | } | |
379 | portptr->port_state = FC_OBJSTATE_DELETED; | |
380 | ||
381 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
382 | ||
383 | nvme_fc_lport_put(lport); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); | |
388 | ||
389 | /** | |
390 | * nvme_fc_register_remoteport - transport entry point called by an | |
391 | * LLDD to register the existence of a NVME | |
392 | * subsystem FC port on its fabric. | |
393 | * @localport: pointer to the (registered) local port that the remote | |
394 | * subsystem port is connected to. | |
395 | * @pinfo: pointer to information about the port to be registered | |
396 | * @rport_p: pointer to a remote port pointer. Upon success, the routine | |
397 | * will allocate a nvme_fc_remote_port structure and place its | |
398 | * address in the remote port pointer. Upon failure, remote port | |
399 | * pointer will be set to 0. | |
400 | * | |
401 | * Returns: | |
402 | * a completion status. Must be 0 upon success; a negative errno | |
403 | * (ex: -ENXIO) upon failure. | |
404 | */ | |
405 | int | |
406 | nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, | |
407 | struct nvme_fc_port_info *pinfo, | |
408 | struct nvme_fc_remote_port **portptr) | |
409 | { | |
410 | struct nvme_fc_lport *lport = localport_to_lport(localport); | |
411 | struct nvme_fc_rport *newrec; | |
412 | unsigned long flags; | |
413 | int ret, idx; | |
414 | ||
415 | newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), | |
416 | GFP_KERNEL); | |
417 | if (!newrec) { | |
418 | ret = -ENOMEM; | |
419 | goto out_reghost_failed; | |
420 | } | |
421 | ||
422 | if (!nvme_fc_lport_get(lport)) { | |
423 | ret = -ESHUTDOWN; | |
424 | goto out_kfree_rport; | |
425 | } | |
426 | ||
427 | idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); | |
428 | if (idx < 0) { | |
429 | ret = -ENOSPC; | |
430 | goto out_lport_put; | |
431 | } | |
432 | ||
433 | INIT_LIST_HEAD(&newrec->endp_list); | |
434 | INIT_LIST_HEAD(&newrec->ctrl_list); | |
c913a8b0 | 435 | INIT_LIST_HEAD(&newrec->ls_req_list); |
e399441d JS |
436 | kref_init(&newrec->ref); |
437 | spin_lock_init(&newrec->lock); | |
438 | newrec->remoteport.localport = &lport->localport; | |
c913a8b0 JS |
439 | newrec->dev = lport->dev; |
440 | newrec->lport = lport; | |
e399441d JS |
441 | newrec->remoteport.private = &newrec[1]; |
442 | newrec->remoteport.port_role = pinfo->port_role; | |
443 | newrec->remoteport.node_name = pinfo->node_name; | |
444 | newrec->remoteport.port_name = pinfo->port_name; | |
445 | newrec->remoteport.port_id = pinfo->port_id; | |
446 | newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; | |
447 | newrec->remoteport.port_num = idx; | |
448 | ||
449 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
450 | list_add_tail(&newrec->endp_list, &lport->endp_list); | |
451 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
452 | ||
453 | *portptr = &newrec->remoteport; | |
454 | return 0; | |
455 | ||
456 | out_lport_put: | |
457 | nvme_fc_lport_put(lport); | |
458 | out_kfree_rport: | |
459 | kfree(newrec); | |
460 | out_reghost_failed: | |
461 | *portptr = NULL; | |
462 | return ret; | |
e399441d JS |
463 | } |
464 | EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); | |
465 | ||
466 | static void | |
467 | nvme_fc_free_rport(struct kref *ref) | |
468 | { | |
469 | struct nvme_fc_rport *rport = | |
470 | container_of(ref, struct nvme_fc_rport, ref); | |
471 | struct nvme_fc_lport *lport = | |
472 | localport_to_lport(rport->remoteport.localport); | |
473 | unsigned long flags; | |
474 | ||
475 | WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); | |
476 | WARN_ON(!list_empty(&rport->ctrl_list)); | |
477 | ||
478 | /* remove from lport list */ | |
479 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
480 | list_del(&rport->endp_list); | |
481 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
482 | ||
483 | /* let the LLDD know we've finished tearing it down */ | |
484 | lport->ops->remoteport_delete(&rport->remoteport); | |
485 | ||
486 | ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); | |
487 | ||
488 | kfree(rport); | |
489 | ||
490 | nvme_fc_lport_put(lport); | |
491 | } | |
492 | ||
493 | static void | |
494 | nvme_fc_rport_put(struct nvme_fc_rport *rport) | |
495 | { | |
496 | kref_put(&rport->ref, nvme_fc_free_rport); | |
497 | } | |
498 | ||
499 | static int | |
500 | nvme_fc_rport_get(struct nvme_fc_rport *rport) | |
501 | { | |
502 | return kref_get_unless_zero(&rport->ref); | |
503 | } | |
504 | ||
8d64daf7 JS |
505 | static int |
506 | nvme_fc_abort_lsops(struct nvme_fc_rport *rport) | |
507 | { | |
508 | struct nvmefc_ls_req_op *lsop; | |
509 | unsigned long flags; | |
510 | ||
511 | restart: | |
512 | spin_lock_irqsave(&rport->lock, flags); | |
513 | ||
514 | list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { | |
515 | if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { | |
516 | lsop->flags |= FCOP_FLAGS_TERMIO; | |
517 | spin_unlock_irqrestore(&rport->lock, flags); | |
518 | rport->lport->ops->ls_abort(&rport->lport->localport, | |
519 | &rport->remoteport, | |
520 | &lsop->ls_req); | |
521 | goto restart; | |
522 | } | |
523 | } | |
524 | spin_unlock_irqrestore(&rport->lock, flags); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
e399441d JS |
529 | /** |
530 | * nvme_fc_unregister_remoteport - transport entry point called by an | |
531 | * LLDD to deregister/remove a previously | |
532 | * registered a NVME subsystem FC port. | |
533 | * @remoteport: pointer to the (registered) remote port that is to be | |
534 | * deregistered. | |
535 | * | |
536 | * Returns: | |
537 | * a completion status. Must be 0 upon success; a negative errno | |
538 | * (ex: -ENXIO) upon failure. | |
539 | */ | |
540 | int | |
541 | nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) | |
542 | { | |
543 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
544 | struct nvme_fc_ctrl *ctrl; | |
545 | unsigned long flags; | |
546 | ||
547 | if (!portptr) | |
548 | return -EINVAL; | |
549 | ||
550 | spin_lock_irqsave(&rport->lock, flags); | |
551 | ||
552 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
553 | spin_unlock_irqrestore(&rport->lock, flags); | |
554 | return -EINVAL; | |
555 | } | |
556 | portptr->port_state = FC_OBJSTATE_DELETED; | |
557 | ||
558 | /* tear down all associations to the remote port */ | |
559 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) | |
560 | __nvme_fc_del_ctrl(ctrl); | |
561 | ||
562 | spin_unlock_irqrestore(&rport->lock, flags); | |
563 | ||
8d64daf7 JS |
564 | nvme_fc_abort_lsops(rport); |
565 | ||
e399441d JS |
566 | nvme_fc_rport_put(rport); |
567 | return 0; | |
568 | } | |
569 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); | |
570 | ||
571 | ||
572 | /* *********************** FC-NVME DMA Handling **************************** */ | |
573 | ||
574 | /* | |
575 | * The fcloop device passes in a NULL device pointer. Real LLD's will | |
576 | * pass in a valid device pointer. If NULL is passed to the dma mapping | |
577 | * routines, depending on the platform, it may or may not succeed, and | |
578 | * may crash. | |
579 | * | |
580 | * As such: | |
581 | * Wrapper all the dma routines and check the dev pointer. | |
582 | * | |
583 | * If simple mappings (return just a dma address, we'll noop them, | |
584 | * returning a dma address of 0. | |
585 | * | |
586 | * On more complex mappings (dma_map_sg), a pseudo routine fills | |
587 | * in the scatter list, setting all dma addresses to 0. | |
588 | */ | |
589 | ||
590 | static inline dma_addr_t | |
591 | fc_dma_map_single(struct device *dev, void *ptr, size_t size, | |
592 | enum dma_data_direction dir) | |
593 | { | |
594 | return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; | |
595 | } | |
596 | ||
597 | static inline int | |
598 | fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
599 | { | |
600 | return dev ? dma_mapping_error(dev, dma_addr) : 0; | |
601 | } | |
602 | ||
603 | static inline void | |
604 | fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
605 | enum dma_data_direction dir) | |
606 | { | |
607 | if (dev) | |
608 | dma_unmap_single(dev, addr, size, dir); | |
609 | } | |
610 | ||
611 | static inline void | |
612 | fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, | |
613 | enum dma_data_direction dir) | |
614 | { | |
615 | if (dev) | |
616 | dma_sync_single_for_cpu(dev, addr, size, dir); | |
617 | } | |
618 | ||
619 | static inline void | |
620 | fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, | |
621 | enum dma_data_direction dir) | |
622 | { | |
623 | if (dev) | |
624 | dma_sync_single_for_device(dev, addr, size, dir); | |
625 | } | |
626 | ||
627 | /* pseudo dma_map_sg call */ | |
628 | static int | |
629 | fc_map_sg(struct scatterlist *sg, int nents) | |
630 | { | |
631 | struct scatterlist *s; | |
632 | int i; | |
633 | ||
634 | WARN_ON(nents == 0 || sg[0].length == 0); | |
635 | ||
636 | for_each_sg(sg, s, nents, i) { | |
637 | s->dma_address = 0L; | |
638 | #ifdef CONFIG_NEED_SG_DMA_LENGTH | |
639 | s->dma_length = s->length; | |
640 | #endif | |
641 | } | |
642 | return nents; | |
643 | } | |
644 | ||
645 | static inline int | |
646 | fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
647 | enum dma_data_direction dir) | |
648 | { | |
649 | return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); | |
650 | } | |
651 | ||
652 | static inline void | |
653 | fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, | |
654 | enum dma_data_direction dir) | |
655 | { | |
656 | if (dev) | |
657 | dma_unmap_sg(dev, sg, nents, dir); | |
658 | } | |
659 | ||
660 | ||
661 | /* *********************** FC-NVME LS Handling **************************** */ | |
662 | ||
663 | static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); | |
664 | static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); | |
665 | ||
666 | ||
667 | static void | |
c913a8b0 | 668 | __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) |
e399441d | 669 | { |
c913a8b0 | 670 | struct nvme_fc_rport *rport = lsop->rport; |
e399441d JS |
671 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; |
672 | unsigned long flags; | |
673 | ||
c913a8b0 | 674 | spin_lock_irqsave(&rport->lock, flags); |
e399441d JS |
675 | |
676 | if (!lsop->req_queued) { | |
c913a8b0 | 677 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d JS |
678 | return; |
679 | } | |
680 | ||
681 | list_del(&lsop->lsreq_list); | |
682 | ||
683 | lsop->req_queued = false; | |
684 | ||
c913a8b0 | 685 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 686 | |
c913a8b0 | 687 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, |
e399441d JS |
688 | (lsreq->rqstlen + lsreq->rsplen), |
689 | DMA_BIDIRECTIONAL); | |
690 | ||
c913a8b0 | 691 | nvme_fc_rport_put(rport); |
e399441d JS |
692 | } |
693 | ||
694 | static int | |
c913a8b0 | 695 | __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, |
e399441d JS |
696 | struct nvmefc_ls_req_op *lsop, |
697 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
698 | { | |
699 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
700 | unsigned long flags; | |
c913a8b0 | 701 | int ret = 0; |
e399441d | 702 | |
c913a8b0 JS |
703 | if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
704 | return -ECONNREFUSED; | |
705 | ||
706 | if (!nvme_fc_rport_get(rport)) | |
e399441d JS |
707 | return -ESHUTDOWN; |
708 | ||
709 | lsreq->done = done; | |
c913a8b0 | 710 | lsop->rport = rport; |
e399441d JS |
711 | lsop->req_queued = false; |
712 | INIT_LIST_HEAD(&lsop->lsreq_list); | |
713 | init_completion(&lsop->ls_done); | |
714 | ||
c913a8b0 | 715 | lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, |
e399441d JS |
716 | lsreq->rqstlen + lsreq->rsplen, |
717 | DMA_BIDIRECTIONAL); | |
c913a8b0 JS |
718 | if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { |
719 | ret = -EFAULT; | |
720 | goto out_putrport; | |
e399441d JS |
721 | } |
722 | lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; | |
723 | ||
c913a8b0 | 724 | spin_lock_irqsave(&rport->lock, flags); |
e399441d | 725 | |
c913a8b0 | 726 | list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); |
e399441d JS |
727 | |
728 | lsop->req_queued = true; | |
729 | ||
c913a8b0 | 730 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 731 | |
c913a8b0 JS |
732 | ret = rport->lport->ops->ls_req(&rport->lport->localport, |
733 | &rport->remoteport, lsreq); | |
e399441d | 734 | if (ret) |
c913a8b0 JS |
735 | goto out_unlink; |
736 | ||
737 | return 0; | |
738 | ||
739 | out_unlink: | |
740 | lsop->ls_error = ret; | |
741 | spin_lock_irqsave(&rport->lock, flags); | |
742 | lsop->req_queued = false; | |
743 | list_del(&lsop->lsreq_list); | |
744 | spin_unlock_irqrestore(&rport->lock, flags); | |
745 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, | |
746 | (lsreq->rqstlen + lsreq->rsplen), | |
747 | DMA_BIDIRECTIONAL); | |
748 | out_putrport: | |
749 | nvme_fc_rport_put(rport); | |
e399441d JS |
750 | |
751 | return ret; | |
752 | } | |
753 | ||
754 | static void | |
755 | nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) | |
756 | { | |
757 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
758 | ||
759 | lsop->ls_error = status; | |
760 | complete(&lsop->ls_done); | |
761 | } | |
762 | ||
763 | static int | |
c913a8b0 | 764 | nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) |
e399441d JS |
765 | { |
766 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
767 | struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; | |
768 | int ret; | |
769 | ||
c913a8b0 | 770 | ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); |
e399441d | 771 | |
c913a8b0 | 772 | if (!ret) { |
e399441d JS |
773 | /* |
774 | * No timeout/not interruptible as we need the struct | |
775 | * to exist until the lldd calls us back. Thus mandate | |
776 | * wait until driver calls back. lldd responsible for | |
777 | * the timeout action | |
778 | */ | |
779 | wait_for_completion(&lsop->ls_done); | |
780 | ||
c913a8b0 | 781 | __nvme_fc_finish_ls_req(lsop); |
e399441d | 782 | |
c913a8b0 | 783 | ret = lsop->ls_error; |
e399441d JS |
784 | } |
785 | ||
c913a8b0 JS |
786 | if (ret) |
787 | return ret; | |
788 | ||
e399441d JS |
789 | /* ACC or RJT payload ? */ |
790 | if (rjt->w0.ls_cmd == FCNVME_LS_RJT) | |
791 | return -ENXIO; | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
c913a8b0 JS |
796 | static int |
797 | nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, | |
e399441d JS |
798 | struct nvmefc_ls_req_op *lsop, |
799 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
800 | { | |
e399441d JS |
801 | /* don't wait for completion */ |
802 | ||
c913a8b0 | 803 | return __nvme_fc_send_ls_req(rport, lsop, done); |
e399441d JS |
804 | } |
805 | ||
806 | /* Validation Error indexes into the string table below */ | |
807 | enum { | |
808 | VERR_NO_ERROR = 0, | |
809 | VERR_LSACC = 1, | |
810 | VERR_LSDESC_RQST = 2, | |
811 | VERR_LSDESC_RQST_LEN = 3, | |
812 | VERR_ASSOC_ID = 4, | |
813 | VERR_ASSOC_ID_LEN = 5, | |
814 | VERR_CONN_ID = 6, | |
815 | VERR_CONN_ID_LEN = 7, | |
816 | VERR_CR_ASSOC = 8, | |
817 | VERR_CR_ASSOC_ACC_LEN = 9, | |
818 | VERR_CR_CONN = 10, | |
819 | VERR_CR_CONN_ACC_LEN = 11, | |
820 | VERR_DISCONN = 12, | |
821 | VERR_DISCONN_ACC_LEN = 13, | |
822 | }; | |
823 | ||
824 | static char *validation_errors[] = { | |
825 | "OK", | |
826 | "Not LS_ACC", | |
827 | "Not LSDESC_RQST", | |
828 | "Bad LSDESC_RQST Length", | |
829 | "Not Association ID", | |
830 | "Bad Association ID Length", | |
831 | "Not Connection ID", | |
832 | "Bad Connection ID Length", | |
833 | "Not CR_ASSOC Rqst", | |
834 | "Bad CR_ASSOC ACC Length", | |
835 | "Not CR_CONN Rqst", | |
836 | "Bad CR_CONN ACC Length", | |
837 | "Not Disconnect Rqst", | |
838 | "Bad Disconnect ACC Length", | |
839 | }; | |
840 | ||
841 | static int | |
842 | nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, | |
843 | struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) | |
844 | { | |
845 | struct nvmefc_ls_req_op *lsop; | |
846 | struct nvmefc_ls_req *lsreq; | |
847 | struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; | |
848 | struct fcnvme_ls_cr_assoc_acc *assoc_acc; | |
849 | int ret, fcret = 0; | |
850 | ||
851 | lsop = kzalloc((sizeof(*lsop) + | |
852 | ctrl->lport->ops->lsrqst_priv_sz + | |
853 | sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); | |
854 | if (!lsop) { | |
855 | ret = -ENOMEM; | |
856 | goto out_no_memory; | |
857 | } | |
858 | lsreq = &lsop->ls_req; | |
859 | ||
860 | lsreq->private = (void *)&lsop[1]; | |
861 | assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) | |
862 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
863 | assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; | |
864 | ||
865 | assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; | |
866 | assoc_rqst->desc_list_len = | |
867 | cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
868 | ||
869 | assoc_rqst->assoc_cmd.desc_tag = | |
870 | cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); | |
871 | assoc_rqst->assoc_cmd.desc_len = | |
872 | fcnvme_lsdesc_len( | |
873 | sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
874 | ||
875 | assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
876 | assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); | |
877 | /* Linux supports only Dynamic controllers */ | |
878 | assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); | |
8e412263 | 879 | uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); |
e399441d JS |
880 | strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, |
881 | min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); | |
882 | strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, | |
883 | min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); | |
884 | ||
885 | lsop->queue = queue; | |
886 | lsreq->rqstaddr = assoc_rqst; | |
887 | lsreq->rqstlen = sizeof(*assoc_rqst); | |
888 | lsreq->rspaddr = assoc_acc; | |
889 | lsreq->rsplen = sizeof(*assoc_acc); | |
890 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
891 | ||
c913a8b0 | 892 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
893 | if (ret) |
894 | goto out_free_buffer; | |
895 | ||
896 | /* process connect LS completion */ | |
897 | ||
898 | /* validate the ACC response */ | |
899 | if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
900 | fcret = VERR_LSACC; | |
f77fc87c | 901 | else if (assoc_acc->hdr.desc_list_len != |
e399441d JS |
902 | fcnvme_lsdesc_len( |
903 | sizeof(struct fcnvme_ls_cr_assoc_acc))) | |
904 | fcret = VERR_CR_ASSOC_ACC_LEN; | |
f77fc87c JS |
905 | else if (assoc_acc->hdr.rqst.desc_tag != |
906 | cpu_to_be32(FCNVME_LSDESC_RQST)) | |
e399441d JS |
907 | fcret = VERR_LSDESC_RQST; |
908 | else if (assoc_acc->hdr.rqst.desc_len != | |
909 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
910 | fcret = VERR_LSDESC_RQST_LEN; | |
911 | else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) | |
912 | fcret = VERR_CR_ASSOC; | |
913 | else if (assoc_acc->associd.desc_tag != | |
914 | cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) | |
915 | fcret = VERR_ASSOC_ID; | |
916 | else if (assoc_acc->associd.desc_len != | |
917 | fcnvme_lsdesc_len( | |
918 | sizeof(struct fcnvme_lsdesc_assoc_id))) | |
919 | fcret = VERR_ASSOC_ID_LEN; | |
920 | else if (assoc_acc->connectid.desc_tag != | |
921 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
922 | fcret = VERR_CONN_ID; | |
923 | else if (assoc_acc->connectid.desc_len != | |
924 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
925 | fcret = VERR_CONN_ID_LEN; | |
926 | ||
927 | if (fcret) { | |
928 | ret = -EBADF; | |
929 | dev_err(ctrl->dev, | |
930 | "q %d connect failed: %s\n", | |
931 | queue->qnum, validation_errors[fcret]); | |
932 | } else { | |
933 | ctrl->association_id = | |
934 | be64_to_cpu(assoc_acc->associd.association_id); | |
935 | queue->connection_id = | |
936 | be64_to_cpu(assoc_acc->connectid.connection_id); | |
937 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
938 | } | |
939 | ||
940 | out_free_buffer: | |
941 | kfree(lsop); | |
942 | out_no_memory: | |
943 | if (ret) | |
944 | dev_err(ctrl->dev, | |
945 | "queue %d connect admin queue failed (%d).\n", | |
946 | queue->qnum, ret); | |
947 | return ret; | |
948 | } | |
949 | ||
950 | static int | |
951 | nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, | |
952 | u16 qsize, u16 ersp_ratio) | |
953 | { | |
954 | struct nvmefc_ls_req_op *lsop; | |
955 | struct nvmefc_ls_req *lsreq; | |
956 | struct fcnvme_ls_cr_conn_rqst *conn_rqst; | |
957 | struct fcnvme_ls_cr_conn_acc *conn_acc; | |
958 | int ret, fcret = 0; | |
959 | ||
960 | lsop = kzalloc((sizeof(*lsop) + | |
961 | ctrl->lport->ops->lsrqst_priv_sz + | |
962 | sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); | |
963 | if (!lsop) { | |
964 | ret = -ENOMEM; | |
965 | goto out_no_memory; | |
966 | } | |
967 | lsreq = &lsop->ls_req; | |
968 | ||
969 | lsreq->private = (void *)&lsop[1]; | |
970 | conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) | |
971 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
972 | conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; | |
973 | ||
974 | conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; | |
975 | conn_rqst->desc_list_len = cpu_to_be32( | |
976 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
977 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
978 | ||
979 | conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
980 | conn_rqst->associd.desc_len = | |
981 | fcnvme_lsdesc_len( | |
982 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
983 | conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
984 | conn_rqst->connect_cmd.desc_tag = | |
985 | cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); | |
986 | conn_rqst->connect_cmd.desc_len = | |
987 | fcnvme_lsdesc_len( | |
988 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
989 | conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
990 | conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); | |
991 | conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); | |
992 | ||
993 | lsop->queue = queue; | |
994 | lsreq->rqstaddr = conn_rqst; | |
995 | lsreq->rqstlen = sizeof(*conn_rqst); | |
996 | lsreq->rspaddr = conn_acc; | |
997 | lsreq->rsplen = sizeof(*conn_acc); | |
998 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
999 | ||
c913a8b0 | 1000 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1001 | if (ret) |
1002 | goto out_free_buffer; | |
1003 | ||
1004 | /* process connect LS completion */ | |
1005 | ||
1006 | /* validate the ACC response */ | |
1007 | if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1008 | fcret = VERR_LSACC; | |
f77fc87c | 1009 | else if (conn_acc->hdr.desc_list_len != |
e399441d JS |
1010 | fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) |
1011 | fcret = VERR_CR_CONN_ACC_LEN; | |
f77fc87c | 1012 | else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) |
e399441d JS |
1013 | fcret = VERR_LSDESC_RQST; |
1014 | else if (conn_acc->hdr.rqst.desc_len != | |
1015 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1016 | fcret = VERR_LSDESC_RQST_LEN; | |
1017 | else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) | |
1018 | fcret = VERR_CR_CONN; | |
1019 | else if (conn_acc->connectid.desc_tag != | |
1020 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1021 | fcret = VERR_CONN_ID; | |
1022 | else if (conn_acc->connectid.desc_len != | |
1023 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1024 | fcret = VERR_CONN_ID_LEN; | |
1025 | ||
1026 | if (fcret) { | |
1027 | ret = -EBADF; | |
1028 | dev_err(ctrl->dev, | |
1029 | "q %d connect failed: %s\n", | |
1030 | queue->qnum, validation_errors[fcret]); | |
1031 | } else { | |
1032 | queue->connection_id = | |
1033 | be64_to_cpu(conn_acc->connectid.connection_id); | |
1034 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1035 | } | |
1036 | ||
1037 | out_free_buffer: | |
1038 | kfree(lsop); | |
1039 | out_no_memory: | |
1040 | if (ret) | |
1041 | dev_err(ctrl->dev, | |
1042 | "queue %d connect command failed (%d).\n", | |
1043 | queue->qnum, ret); | |
1044 | return ret; | |
1045 | } | |
1046 | ||
1047 | static void | |
1048 | nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) | |
1049 | { | |
1050 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
e399441d | 1051 | |
c913a8b0 | 1052 | __nvme_fc_finish_ls_req(lsop); |
e399441d JS |
1053 | |
1054 | /* fc-nvme iniator doesn't care about success or failure of cmd */ | |
1055 | ||
1056 | kfree(lsop); | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * This routine sends a FC-NVME LS to disconnect (aka terminate) | |
1061 | * the FC-NVME Association. Terminating the association also | |
1062 | * terminates the FC-NVME connections (per queue, both admin and io | |
1063 | * queues) that are part of the association. E.g. things are torn | |
1064 | * down, and the related FC-NVME Association ID and Connection IDs | |
1065 | * become invalid. | |
1066 | * | |
1067 | * The behavior of the fc-nvme initiator is such that it's | |
1068 | * understanding of the association and connections will implicitly | |
1069 | * be torn down. The action is implicit as it may be due to a loss of | |
1070 | * connectivity with the fc-nvme target, so you may never get a | |
1071 | * response even if you tried. As such, the action of this routine | |
1072 | * is to asynchronously send the LS, ignore any results of the LS, and | |
1073 | * continue on with terminating the association. If the fc-nvme target | |
1074 | * is present and receives the LS, it too can tear down. | |
1075 | */ | |
1076 | static void | |
1077 | nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) | |
1078 | { | |
1079 | struct fcnvme_ls_disconnect_rqst *discon_rqst; | |
1080 | struct fcnvme_ls_disconnect_acc *discon_acc; | |
1081 | struct nvmefc_ls_req_op *lsop; | |
1082 | struct nvmefc_ls_req *lsreq; | |
c913a8b0 | 1083 | int ret; |
e399441d JS |
1084 | |
1085 | lsop = kzalloc((sizeof(*lsop) + | |
1086 | ctrl->lport->ops->lsrqst_priv_sz + | |
1087 | sizeof(*discon_rqst) + sizeof(*discon_acc)), | |
1088 | GFP_KERNEL); | |
1089 | if (!lsop) | |
1090 | /* couldn't sent it... too bad */ | |
1091 | return; | |
1092 | ||
1093 | lsreq = &lsop->ls_req; | |
1094 | ||
1095 | lsreq->private = (void *)&lsop[1]; | |
1096 | discon_rqst = (struct fcnvme_ls_disconnect_rqst *) | |
1097 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1098 | discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; | |
1099 | ||
1100 | discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; | |
1101 | discon_rqst->desc_list_len = cpu_to_be32( | |
1102 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1103 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1104 | ||
1105 | discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1106 | discon_rqst->associd.desc_len = | |
1107 | fcnvme_lsdesc_len( | |
1108 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1109 | ||
1110 | discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1111 | ||
1112 | discon_rqst->discon_cmd.desc_tag = cpu_to_be32( | |
1113 | FCNVME_LSDESC_DISCONN_CMD); | |
1114 | discon_rqst->discon_cmd.desc_len = | |
1115 | fcnvme_lsdesc_len( | |
1116 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1117 | discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; | |
1118 | discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); | |
1119 | ||
1120 | lsreq->rqstaddr = discon_rqst; | |
1121 | lsreq->rqstlen = sizeof(*discon_rqst); | |
1122 | lsreq->rspaddr = discon_acc; | |
1123 | lsreq->rsplen = sizeof(*discon_acc); | |
1124 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1125 | ||
c913a8b0 JS |
1126 | ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, |
1127 | nvme_fc_disconnect_assoc_done); | |
1128 | if (ret) | |
1129 | kfree(lsop); | |
e399441d JS |
1130 | |
1131 | /* only meaningful part to terminating the association */ | |
1132 | ctrl->association_id = 0; | |
1133 | } | |
1134 | ||
1135 | ||
1136 | /* *********************** NVME Ctrl Routines **************************** */ | |
1137 | ||
78a7ac26 | 1138 | static void __nvme_fc_final_op_cleanup(struct request *rq); |
f874d5d0 | 1139 | static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); |
e399441d JS |
1140 | |
1141 | static int | |
1142 | nvme_fc_reinit_request(void *data, struct request *rq) | |
1143 | { | |
1144 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1145 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1146 | ||
1147 | memset(cmdiu, 0, sizeof(*cmdiu)); | |
1148 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1149 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1150 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1151 | memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static void | |
1157 | __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, | |
1158 | struct nvme_fc_fcp_op *op) | |
1159 | { | |
1160 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, | |
1161 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1162 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, | |
1163 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1164 | ||
1165 | atomic_set(&op->state, FCPOP_STATE_UNINIT); | |
1166 | } | |
1167 | ||
1168 | static void | |
d6296d39 CH |
1169 | nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
1170 | unsigned int hctx_idx) | |
e399441d JS |
1171 | { |
1172 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1173 | ||
d6296d39 | 1174 | return __nvme_fc_exit_request(set->driver_data, op); |
e399441d JS |
1175 | } |
1176 | ||
78a7ac26 JS |
1177 | static int |
1178 | __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) | |
1179 | { | |
1180 | int state; | |
1181 | ||
1182 | state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); | |
1183 | if (state != FCPOP_STATE_ACTIVE) { | |
1184 | atomic_set(&op->state, state); | |
1185 | return -ECANCELED; | |
1186 | } | |
1187 | ||
1188 | ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, | |
1189 | &ctrl->rport->remoteport, | |
1190 | op->queue->lldd_handle, | |
1191 | &op->fcp_req); | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
e399441d | 1196 | static void |
78a7ac26 | 1197 | nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
1198 | { |
1199 | struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; | |
78a7ac26 JS |
1200 | unsigned long flags; |
1201 | int i, ret; | |
e399441d JS |
1202 | |
1203 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
78a7ac26 | 1204 | if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) |
e399441d | 1205 | continue; |
78a7ac26 JS |
1206 | |
1207 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1208 | if (ctrl->flags & FCCTRL_TERMIO) { |
1209 | ctrl->iocnt++; | |
1210 | aen_op->flags |= FCOP_FLAGS_TERMIO; | |
1211 | } | |
78a7ac26 JS |
1212 | spin_unlock_irqrestore(&ctrl->lock, flags); |
1213 | ||
1214 | ret = __nvme_fc_abort_op(ctrl, aen_op); | |
1215 | if (ret) { | |
1216 | /* | |
1217 | * if __nvme_fc_abort_op failed the io wasn't | |
1218 | * active. Thus this call path is running in | |
1219 | * parallel to the io complete. Treat as non-error. | |
1220 | */ | |
1221 | ||
1222 | /* back out the flags/counters */ | |
1223 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1224 | if (ctrl->flags & FCCTRL_TERMIO) |
1225 | ctrl->iocnt--; | |
78a7ac26 JS |
1226 | aen_op->flags &= ~FCOP_FLAGS_TERMIO; |
1227 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1228 | return; | |
1229 | } | |
e399441d JS |
1230 | } |
1231 | } | |
1232 | ||
78a7ac26 JS |
1233 | static inline int |
1234 | __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, | |
1235 | struct nvme_fc_fcp_op *op) | |
1236 | { | |
1237 | unsigned long flags; | |
1238 | bool complete_rq = false; | |
1239 | ||
1240 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1241 | if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { |
1242 | if (ctrl->flags & FCCTRL_TERMIO) | |
1243 | ctrl->iocnt--; | |
1244 | } | |
78a7ac26 JS |
1245 | if (op->flags & FCOP_FLAGS_RELEASED) |
1246 | complete_rq = true; | |
1247 | else | |
1248 | op->flags |= FCOP_FLAGS_COMPLETE; | |
1249 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1250 | ||
1251 | return complete_rq; | |
1252 | } | |
1253 | ||
baee29ac | 1254 | static void |
e399441d JS |
1255 | nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) |
1256 | { | |
1257 | struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); | |
1258 | struct request *rq = op->rq; | |
1259 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1260 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1261 | struct nvme_fc_queue *queue = op->queue; | |
1262 | struct nvme_completion *cqe = &op->rsp_iu.cqe; | |
458f280d | 1263 | struct nvme_command *sqe = &op->cmd_iu.sqe; |
d663b69f | 1264 | __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); |
27fa9bc5 | 1265 | union nvme_result result; |
f874d5d0 | 1266 | bool complete_rq, terminate_assoc = true; |
e399441d JS |
1267 | |
1268 | /* | |
1269 | * WARNING: | |
1270 | * The current linux implementation of a nvme controller | |
1271 | * allocates a single tag set for all io queues and sizes | |
1272 | * the io queues to fully hold all possible tags. Thus, the | |
1273 | * implementation does not reference or care about the sqhd | |
1274 | * value as it never needs to use the sqhd/sqtail pointers | |
1275 | * for submission pacing. | |
1276 | * | |
1277 | * This affects the FC-NVME implementation in two ways: | |
1278 | * 1) As the value doesn't matter, we don't need to waste | |
1279 | * cycles extracting it from ERSPs and stamping it in the | |
1280 | * cases where the transport fabricates CQEs on successful | |
1281 | * completions. | |
1282 | * 2) The FC-NVME implementation requires that delivery of | |
1283 | * ERSP completions are to go back to the nvme layer in order | |
1284 | * relative to the rsn, such that the sqhd value will always | |
1285 | * be "in order" for the nvme layer. As the nvme layer in | |
1286 | * linux doesn't care about sqhd, there's no need to return | |
1287 | * them in order. | |
1288 | * | |
1289 | * Additionally: | |
1290 | * As the core nvme layer in linux currently does not look at | |
1291 | * every field in the cqe - in cases where the FC transport must | |
1292 | * fabricate a CQE, the following fields will not be set as they | |
1293 | * are not referenced: | |
1294 | * cqe.sqid, cqe.sqhd, cqe.command_id | |
f874d5d0 JS |
1295 | * |
1296 | * Failure or error of an individual i/o, in a transport | |
1297 | * detected fashion unrelated to the nvme completion status, | |
1298 | * potentially cause the initiator and target sides to get out | |
1299 | * of sync on SQ head/tail (aka outstanding io count allowed). | |
1300 | * Per FC-NVME spec, failure of an individual command requires | |
1301 | * the connection to be terminated, which in turn requires the | |
1302 | * association to be terminated. | |
e399441d JS |
1303 | */ |
1304 | ||
1305 | fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, | |
1306 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1307 | ||
1308 | if (atomic_read(&op->state) == FCPOP_STATE_ABORTED) | |
d663b69f | 1309 | status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); |
62eeacb0 | 1310 | else if (freq->status) |
d663b69f | 1311 | status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1); |
e399441d JS |
1312 | |
1313 | /* | |
1314 | * For the linux implementation, if we have an unsuccesful | |
1315 | * status, they blk-mq layer can typically be called with the | |
1316 | * non-zero status and the content of the cqe isn't important. | |
1317 | */ | |
1318 | if (status) | |
1319 | goto done; | |
1320 | ||
1321 | /* | |
1322 | * command completed successfully relative to the wire | |
1323 | * protocol. However, validate anything received and | |
1324 | * extract the status and result from the cqe (create it | |
1325 | * where necessary). | |
1326 | */ | |
1327 | ||
1328 | switch (freq->rcv_rsplen) { | |
1329 | ||
1330 | case 0: | |
1331 | case NVME_FC_SIZEOF_ZEROS_RSP: | |
1332 | /* | |
1333 | * No response payload or 12 bytes of payload (which | |
1334 | * should all be zeros) are considered successful and | |
1335 | * no payload in the CQE by the transport. | |
1336 | */ | |
1337 | if (freq->transferred_length != | |
1338 | be32_to_cpu(op->cmd_iu.data_len)) { | |
d663b69f | 1339 | status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1); |
e399441d JS |
1340 | goto done; |
1341 | } | |
27fa9bc5 | 1342 | result.u64 = 0; |
e399441d JS |
1343 | break; |
1344 | ||
1345 | case sizeof(struct nvme_fc_ersp_iu): | |
1346 | /* | |
1347 | * The ERSP IU contains a full completion with CQE. | |
1348 | * Validate ERSP IU and look at cqe. | |
1349 | */ | |
1350 | if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != | |
1351 | (freq->rcv_rsplen / 4) || | |
1352 | be32_to_cpu(op->rsp_iu.xfrd_len) != | |
1353 | freq->transferred_length || | |
726a1080 | 1354 | op->rsp_iu.status_code || |
458f280d | 1355 | sqe->common.command_id != cqe->command_id)) { |
d663b69f | 1356 | status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1); |
e399441d JS |
1357 | goto done; |
1358 | } | |
27fa9bc5 | 1359 | result = cqe->result; |
d663b69f | 1360 | status = cqe->status; |
e399441d JS |
1361 | break; |
1362 | ||
1363 | default: | |
d663b69f | 1364 | status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1); |
e399441d JS |
1365 | goto done; |
1366 | } | |
1367 | ||
f874d5d0 JS |
1368 | terminate_assoc = false; |
1369 | ||
e399441d | 1370 | done: |
78a7ac26 | 1371 | if (op->flags & FCOP_FLAGS_AEN) { |
27fa9bc5 | 1372 | nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); |
78a7ac26 JS |
1373 | complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); |
1374 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1375 | op->flags = FCOP_FLAGS_AEN; /* clear other flags */ | |
e399441d | 1376 | nvme_fc_ctrl_put(ctrl); |
f874d5d0 | 1377 | goto check_error; |
e399441d JS |
1378 | } |
1379 | ||
78a7ac26 JS |
1380 | complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); |
1381 | if (!complete_rq) { | |
1382 | if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { | |
e392e1f1 | 1383 | status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); |
78a7ac26 | 1384 | if (blk_queue_dying(rq->q)) |
e392e1f1 | 1385 | status |= cpu_to_le16(NVME_SC_DNR << 1); |
78a7ac26 JS |
1386 | } |
1387 | nvme_end_request(rq, status, result); | |
1388 | } else | |
1389 | __nvme_fc_final_op_cleanup(rq); | |
f874d5d0 JS |
1390 | |
1391 | check_error: | |
1392 | if (terminate_assoc) | |
1393 | nvme_fc_error_recovery(ctrl, "transport detected io error"); | |
e399441d JS |
1394 | } |
1395 | ||
1396 | static int | |
1397 | __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, | |
1398 | struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, | |
1399 | struct request *rq, u32 rqno) | |
1400 | { | |
1401 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1402 | int ret = 0; | |
1403 | ||
1404 | memset(op, 0, sizeof(*op)); | |
1405 | op->fcp_req.cmdaddr = &op->cmd_iu; | |
1406 | op->fcp_req.cmdlen = sizeof(op->cmd_iu); | |
1407 | op->fcp_req.rspaddr = &op->rsp_iu; | |
1408 | op->fcp_req.rsplen = sizeof(op->rsp_iu); | |
1409 | op->fcp_req.done = nvme_fc_fcpio_done; | |
1410 | op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; | |
1411 | op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; | |
1412 | op->ctrl = ctrl; | |
1413 | op->queue = queue; | |
1414 | op->rq = rq; | |
1415 | op->rqno = rqno; | |
1416 | ||
1417 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1418 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1419 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1420 | ||
1421 | op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, | |
1422 | &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1423 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { | |
1424 | dev_err(ctrl->dev, | |
1425 | "FCP Op failed - cmdiu dma mapping failed.\n"); | |
1426 | ret = EFAULT; | |
1427 | goto out_on_error; | |
1428 | } | |
1429 | ||
1430 | op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, | |
1431 | &op->rsp_iu, sizeof(op->rsp_iu), | |
1432 | DMA_FROM_DEVICE); | |
1433 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { | |
1434 | dev_err(ctrl->dev, | |
1435 | "FCP Op failed - rspiu dma mapping failed.\n"); | |
1436 | ret = EFAULT; | |
1437 | } | |
1438 | ||
1439 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1440 | out_on_error: | |
1441 | return ret; | |
1442 | } | |
1443 | ||
1444 | static int | |
d6296d39 CH |
1445 | nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, |
1446 | unsigned int hctx_idx, unsigned int numa_node) | |
e399441d | 1447 | { |
d6296d39 | 1448 | struct nvme_fc_ctrl *ctrl = set->driver_data; |
e399441d | 1449 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); |
76f983cb CH |
1450 | int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; |
1451 | struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; | |
e399441d JS |
1452 | |
1453 | return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); | |
1454 | } | |
1455 | ||
1456 | static int | |
1457 | nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1458 | { | |
1459 | struct nvme_fc_fcp_op *aen_op; | |
1460 | struct nvme_fc_cmd_iu *cmdiu; | |
1461 | struct nvme_command *sqe; | |
61bff8ef | 1462 | void *private; |
e399441d JS |
1463 | int i, ret; |
1464 | ||
1465 | aen_op = ctrl->aen_ops; | |
1466 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
61bff8ef JS |
1467 | private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, |
1468 | GFP_KERNEL); | |
1469 | if (!private) | |
1470 | return -ENOMEM; | |
1471 | ||
e399441d JS |
1472 | cmdiu = &aen_op->cmd_iu; |
1473 | sqe = &cmdiu->sqe; | |
1474 | ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], | |
1475 | aen_op, (struct request *)NULL, | |
1476 | (AEN_CMDID_BASE + i)); | |
61bff8ef JS |
1477 | if (ret) { |
1478 | kfree(private); | |
e399441d | 1479 | return ret; |
61bff8ef | 1480 | } |
e399441d | 1481 | |
78a7ac26 | 1482 | aen_op->flags = FCOP_FLAGS_AEN; |
61bff8ef JS |
1483 | aen_op->fcp_req.first_sgl = NULL; /* no sg list */ |
1484 | aen_op->fcp_req.private = private; | |
78a7ac26 | 1485 | |
e399441d JS |
1486 | memset(sqe, 0, sizeof(*sqe)); |
1487 | sqe->common.opcode = nvme_admin_async_event; | |
78a7ac26 | 1488 | /* Note: core layer may overwrite the sqe.command_id value */ |
e399441d JS |
1489 | sqe->common.command_id = AEN_CMDID_BASE + i; |
1490 | } | |
1491 | return 0; | |
1492 | } | |
1493 | ||
61bff8ef JS |
1494 | static void |
1495 | nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1496 | { | |
1497 | struct nvme_fc_fcp_op *aen_op; | |
1498 | int i; | |
1499 | ||
1500 | aen_op = ctrl->aen_ops; | |
1501 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
1502 | if (!aen_op->fcp_req.private) | |
1503 | continue; | |
1504 | ||
1505 | __nvme_fc_exit_request(ctrl, aen_op); | |
1506 | ||
1507 | kfree(aen_op->fcp_req.private); | |
1508 | aen_op->fcp_req.private = NULL; | |
1509 | } | |
1510 | } | |
e399441d JS |
1511 | |
1512 | static inline void | |
1513 | __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, | |
1514 | unsigned int qidx) | |
1515 | { | |
1516 | struct nvme_fc_queue *queue = &ctrl->queues[qidx]; | |
1517 | ||
1518 | hctx->driver_data = queue; | |
1519 | queue->hctx = hctx; | |
1520 | } | |
1521 | ||
1522 | static int | |
1523 | nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1524 | unsigned int hctx_idx) | |
1525 | { | |
1526 | struct nvme_fc_ctrl *ctrl = data; | |
1527 | ||
1528 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | static int | |
1534 | nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1535 | unsigned int hctx_idx) | |
1536 | { | |
1537 | struct nvme_fc_ctrl *ctrl = data; | |
1538 | ||
1539 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | static void | |
1545 | nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx, size_t queue_size) | |
1546 | { | |
1547 | struct nvme_fc_queue *queue; | |
1548 | ||
1549 | queue = &ctrl->queues[idx]; | |
1550 | memset(queue, 0, sizeof(*queue)); | |
1551 | queue->ctrl = ctrl; | |
1552 | queue->qnum = idx; | |
1553 | atomic_set(&queue->csn, 1); | |
1554 | queue->dev = ctrl->dev; | |
1555 | ||
1556 | if (idx > 0) | |
1557 | queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; | |
1558 | else | |
1559 | queue->cmnd_capsule_len = sizeof(struct nvme_command); | |
1560 | ||
1561 | queue->queue_size = queue_size; | |
1562 | ||
1563 | /* | |
1564 | * Considered whether we should allocate buffers for all SQEs | |
1565 | * and CQEs and dma map them - mapping their respective entries | |
1566 | * into the request structures (kernel vm addr and dma address) | |
1567 | * thus the driver could use the buffers/mappings directly. | |
1568 | * It only makes sense if the LLDD would use them for its | |
1569 | * messaging api. It's very unlikely most adapter api's would use | |
1570 | * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload | |
1571 | * structures were used instead. | |
1572 | */ | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * This routine terminates a queue at the transport level. | |
1577 | * The transport has already ensured that all outstanding ios on | |
1578 | * the queue have been terminated. | |
1579 | * The transport will send a Disconnect LS request to terminate | |
1580 | * the queue's connection. Termination of the admin queue will also | |
1581 | * terminate the association at the target. | |
1582 | */ | |
1583 | static void | |
1584 | nvme_fc_free_queue(struct nvme_fc_queue *queue) | |
1585 | { | |
1586 | if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) | |
1587 | return; | |
1588 | ||
1589 | /* | |
1590 | * Current implementation never disconnects a single queue. | |
1591 | * It always terminates a whole association. So there is never | |
1592 | * a disconnect(queue) LS sent to the target. | |
1593 | */ | |
1594 | ||
1595 | queue->connection_id = 0; | |
1596 | clear_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1597 | } | |
1598 | ||
1599 | static void | |
1600 | __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1601 | struct nvme_fc_queue *queue, unsigned int qidx) | |
1602 | { | |
1603 | if (ctrl->lport->ops->delete_queue) | |
1604 | ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, | |
1605 | queue->lldd_handle); | |
1606 | queue->lldd_handle = NULL; | |
1607 | } | |
1608 | ||
e399441d JS |
1609 | static void |
1610 | nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) | |
1611 | { | |
1612 | int i; | |
1613 | ||
1614 | for (i = 1; i < ctrl->queue_count; i++) | |
1615 | nvme_fc_free_queue(&ctrl->queues[i]); | |
1616 | } | |
1617 | ||
1618 | static int | |
1619 | __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1620 | struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) | |
1621 | { | |
1622 | int ret = 0; | |
1623 | ||
1624 | queue->lldd_handle = NULL; | |
1625 | if (ctrl->lport->ops->create_queue) | |
1626 | ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, | |
1627 | qidx, qsize, &queue->lldd_handle); | |
1628 | ||
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | static void | |
1633 | nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) | |
1634 | { | |
1635 | struct nvme_fc_queue *queue = &ctrl->queues[ctrl->queue_count - 1]; | |
1636 | int i; | |
1637 | ||
1638 | for (i = ctrl->queue_count - 1; i >= 1; i--, queue--) | |
1639 | __nvme_fc_delete_hw_queue(ctrl, queue, i); | |
1640 | } | |
1641 | ||
1642 | static int | |
1643 | nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1644 | { | |
1645 | struct nvme_fc_queue *queue = &ctrl->queues[1]; | |
17a1ec08 | 1646 | int i, ret; |
e399441d JS |
1647 | |
1648 | for (i = 1; i < ctrl->queue_count; i++, queue++) { | |
1649 | ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); | |
17a1ec08 JT |
1650 | if (ret) |
1651 | goto delete_queues; | |
e399441d JS |
1652 | } |
1653 | ||
1654 | return 0; | |
17a1ec08 JT |
1655 | |
1656 | delete_queues: | |
1657 | for (; i >= 0; i--) | |
1658 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); | |
1659 | return ret; | |
e399441d JS |
1660 | } |
1661 | ||
1662 | static int | |
1663 | nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1664 | { | |
1665 | int i, ret = 0; | |
1666 | ||
1667 | for (i = 1; i < ctrl->queue_count; i++) { | |
1668 | ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, | |
1669 | (qsize / 5)); | |
1670 | if (ret) | |
1671 | break; | |
1672 | ret = nvmf_connect_io_queue(&ctrl->ctrl, i); | |
1673 | if (ret) | |
1674 | break; | |
1675 | } | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | ||
1680 | static void | |
1681 | nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) | |
1682 | { | |
1683 | int i; | |
1684 | ||
1685 | for (i = 1; i < ctrl->queue_count; i++) | |
1686 | nvme_fc_init_queue(ctrl, i, ctrl->ctrl.sqsize); | |
1687 | } | |
1688 | ||
1689 | static void | |
1690 | nvme_fc_ctrl_free(struct kref *ref) | |
1691 | { | |
1692 | struct nvme_fc_ctrl *ctrl = | |
1693 | container_of(ref, struct nvme_fc_ctrl, ref); | |
1694 | unsigned long flags; | |
1695 | ||
61bff8ef JS |
1696 | if (ctrl->ctrl.tagset) { |
1697 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
1698 | blk_mq_free_tag_set(&ctrl->tag_set); | |
e399441d JS |
1699 | } |
1700 | ||
61bff8ef JS |
1701 | /* remove from rport list */ |
1702 | spin_lock_irqsave(&ctrl->rport->lock, flags); | |
1703 | list_del(&ctrl->ctrl_list); | |
1704 | spin_unlock_irqrestore(&ctrl->rport->lock, flags); | |
1705 | ||
1706 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
1707 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
1708 | ||
1709 | kfree(ctrl->queues); | |
1710 | ||
e399441d JS |
1711 | put_device(ctrl->dev); |
1712 | nvme_fc_rport_put(ctrl->rport); | |
1713 | ||
e399441d | 1714 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
de41447a EM |
1715 | if (ctrl->ctrl.opts) |
1716 | nvmf_free_options(ctrl->ctrl.opts); | |
e399441d JS |
1717 | kfree(ctrl); |
1718 | } | |
1719 | ||
1720 | static void | |
1721 | nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) | |
1722 | { | |
1723 | kref_put(&ctrl->ref, nvme_fc_ctrl_free); | |
1724 | } | |
1725 | ||
1726 | static int | |
1727 | nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) | |
1728 | { | |
1729 | return kref_get_unless_zero(&ctrl->ref); | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * All accesses from nvme core layer done - can now free the | |
1734 | * controller. Called after last nvme_put_ctrl() call | |
1735 | */ | |
1736 | static void | |
61bff8ef | 1737 | nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) |
e399441d JS |
1738 | { |
1739 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
1740 | ||
1741 | WARN_ON(nctrl != &ctrl->ctrl); | |
1742 | ||
61bff8ef JS |
1743 | nvme_fc_ctrl_put(ctrl); |
1744 | } | |
e399441d | 1745 | |
61bff8ef JS |
1746 | static void |
1747 | nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) | |
1748 | { | |
1749 | dev_warn(ctrl->ctrl.device, | |
1750 | "NVME-FC{%d}: transport association error detected: %s\n", | |
1751 | ctrl->cnum, errmsg); | |
589ff775 | 1752 | dev_warn(ctrl->ctrl.device, |
61bff8ef | 1753 | "NVME-FC{%d}: resetting controller\n", ctrl->cnum); |
e399441d | 1754 | |
2952a879 JS |
1755 | /* stop the queues on error, cleanup is in reset thread */ |
1756 | if (ctrl->queue_count > 1) | |
1757 | nvme_stop_queues(&ctrl->ctrl); | |
1758 | ||
61bff8ef JS |
1759 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { |
1760 | dev_err(ctrl->ctrl.device, | |
1761 | "NVME-FC{%d}: error_recovery: Couldn't change state " | |
1762 | "to RECONNECTING\n", ctrl->cnum); | |
1763 | return; | |
e399441d JS |
1764 | } |
1765 | ||
d86c4d8e | 1766 | nvme_reset_ctrl(&ctrl->ctrl); |
e399441d JS |
1767 | } |
1768 | ||
baee29ac | 1769 | static enum blk_eh_timer_return |
e399441d JS |
1770 | nvme_fc_timeout(struct request *rq, bool reserved) |
1771 | { | |
1772 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1773 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1774 | int ret; | |
1775 | ||
1776 | if (reserved) | |
1777 | return BLK_EH_RESET_TIMER; | |
1778 | ||
1779 | ret = __nvme_fc_abort_op(ctrl, op); | |
1780 | if (ret) | |
1781 | /* io wasn't active to abort consider it done */ | |
1782 | return BLK_EH_HANDLED; | |
1783 | ||
1784 | /* | |
61bff8ef JS |
1785 | * we can't individually ABTS an io without affecting the queue, |
1786 | * thus killing the queue, adn thus the association. | |
1787 | * So resolve by performing a controller reset, which will stop | |
1788 | * the host/io stack, terminate the association on the link, | |
1789 | * and recreate an association on the link. | |
e399441d | 1790 | */ |
61bff8ef | 1791 | nvme_fc_error_recovery(ctrl, "io timeout error"); |
e399441d JS |
1792 | |
1793 | return BLK_EH_HANDLED; | |
1794 | } | |
1795 | ||
1796 | static int | |
1797 | nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
1798 | struct nvme_fc_fcp_op *op) | |
1799 | { | |
1800 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
e399441d JS |
1801 | enum dma_data_direction dir; |
1802 | int ret; | |
1803 | ||
1804 | freq->sg_cnt = 0; | |
1805 | ||
b131c61d | 1806 | if (!blk_rq_payload_bytes(rq)) |
e399441d JS |
1807 | return 0; |
1808 | ||
1809 | freq->sg_table.sgl = freq->first_sgl; | |
19e420bb CH |
1810 | ret = sg_alloc_table_chained(&freq->sg_table, |
1811 | blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); | |
e399441d JS |
1812 | if (ret) |
1813 | return -ENOMEM; | |
1814 | ||
1815 | op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); | |
19e420bb | 1816 | WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); |
e399441d JS |
1817 | dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
1818 | freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, | |
1819 | op->nents, dir); | |
1820 | if (unlikely(freq->sg_cnt <= 0)) { | |
1821 | sg_free_table_chained(&freq->sg_table, true); | |
1822 | freq->sg_cnt = 0; | |
1823 | return -EFAULT; | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * TODO: blk_integrity_rq(rq) for DIF | |
1828 | */ | |
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | static void | |
1833 | nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
1834 | struct nvme_fc_fcp_op *op) | |
1835 | { | |
1836 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1837 | ||
1838 | if (!freq->sg_cnt) | |
1839 | return; | |
1840 | ||
1841 | fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, | |
1842 | ((rq_data_dir(rq) == WRITE) ? | |
1843 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
1844 | ||
1845 | nvme_cleanup_cmd(rq); | |
1846 | ||
1847 | sg_free_table_chained(&freq->sg_table, true); | |
1848 | ||
1849 | freq->sg_cnt = 0; | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * In FC, the queue is a logical thing. At transport connect, the target | |
1854 | * creates its "queue" and returns a handle that is to be given to the | |
1855 | * target whenever it posts something to the corresponding SQ. When an | |
1856 | * SQE is sent on a SQ, FC effectively considers the SQE, or rather the | |
1857 | * command contained within the SQE, an io, and assigns a FC exchange | |
1858 | * to it. The SQE and the associated SQ handle are sent in the initial | |
1859 | * CMD IU sents on the exchange. All transfers relative to the io occur | |
1860 | * as part of the exchange. The CQE is the last thing for the io, | |
1861 | * which is transferred (explicitly or implicitly) with the RSP IU | |
1862 | * sent on the exchange. After the CQE is received, the FC exchange is | |
1863 | * terminaed and the Exchange may be used on a different io. | |
1864 | * | |
1865 | * The transport to LLDD api has the transport making a request for a | |
1866 | * new fcp io request to the LLDD. The LLDD then allocates a FC exchange | |
1867 | * resource and transfers the command. The LLDD will then process all | |
1868 | * steps to complete the io. Upon completion, the transport done routine | |
1869 | * is called. | |
1870 | * | |
1871 | * So - while the operation is outstanding to the LLDD, there is a link | |
1872 | * level FC exchange resource that is also outstanding. This must be | |
1873 | * considered in all cleanup operations. | |
1874 | */ | |
fc17b653 | 1875 | static blk_status_t |
e399441d JS |
1876 | nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, |
1877 | struct nvme_fc_fcp_op *op, u32 data_len, | |
1878 | enum nvmefc_fcp_datadir io_dir) | |
1879 | { | |
1880 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1881 | struct nvme_command *sqe = &cmdiu->sqe; | |
1882 | u32 csn; | |
1883 | int ret; | |
1884 | ||
61bff8ef JS |
1885 | /* |
1886 | * before attempting to send the io, check to see if we believe | |
1887 | * the target device is present | |
1888 | */ | |
1889 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) | |
fc17b653 | 1890 | return BLK_STS_IOERR; |
61bff8ef | 1891 | |
e399441d | 1892 | if (!nvme_fc_ctrl_get(ctrl)) |
fc17b653 | 1893 | return BLK_STS_IOERR; |
e399441d JS |
1894 | |
1895 | /* format the FC-NVME CMD IU and fcp_req */ | |
1896 | cmdiu->connection_id = cpu_to_be64(queue->connection_id); | |
1897 | csn = atomic_inc_return(&queue->csn); | |
1898 | cmdiu->csn = cpu_to_be32(csn); | |
1899 | cmdiu->data_len = cpu_to_be32(data_len); | |
1900 | switch (io_dir) { | |
1901 | case NVMEFC_FCP_WRITE: | |
1902 | cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; | |
1903 | break; | |
1904 | case NVMEFC_FCP_READ: | |
1905 | cmdiu->flags = FCNVME_CMD_FLAGS_READ; | |
1906 | break; | |
1907 | case NVMEFC_FCP_NODATA: | |
1908 | cmdiu->flags = 0; | |
1909 | break; | |
1910 | } | |
1911 | op->fcp_req.payload_length = data_len; | |
1912 | op->fcp_req.io_dir = io_dir; | |
1913 | op->fcp_req.transferred_length = 0; | |
1914 | op->fcp_req.rcv_rsplen = 0; | |
62eeacb0 | 1915 | op->fcp_req.status = NVME_SC_SUCCESS; |
e399441d JS |
1916 | op->fcp_req.sqid = cpu_to_le16(queue->qnum); |
1917 | ||
1918 | /* | |
1919 | * validate per fabric rules, set fields mandated by fabric spec | |
1920 | * as well as those by FC-NVME spec. | |
1921 | */ | |
1922 | WARN_ON_ONCE(sqe->common.metadata); | |
1923 | WARN_ON_ONCE(sqe->common.dptr.prp1); | |
1924 | WARN_ON_ONCE(sqe->common.dptr.prp2); | |
1925 | sqe->common.flags |= NVME_CMD_SGL_METABUF; | |
1926 | ||
1927 | /* | |
1928 | * format SQE DPTR field per FC-NVME rules | |
1929 | * type=data block descr; subtype=offset; | |
1930 | * offset is currently 0. | |
1931 | */ | |
1932 | sqe->rw.dptr.sgl.type = NVME_SGL_FMT_OFFSET; | |
1933 | sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); | |
1934 | sqe->rw.dptr.sgl.addr = 0; | |
1935 | ||
78a7ac26 | 1936 | if (!(op->flags & FCOP_FLAGS_AEN)) { |
e399441d JS |
1937 | ret = nvme_fc_map_data(ctrl, op->rq, op); |
1938 | if (ret < 0) { | |
e399441d JS |
1939 | nvme_cleanup_cmd(op->rq); |
1940 | nvme_fc_ctrl_put(ctrl); | |
fc17b653 CH |
1941 | if (ret == -ENOMEM || ret == -EAGAIN) |
1942 | return BLK_STS_RESOURCE; | |
1943 | return BLK_STS_IOERR; | |
e399441d JS |
1944 | } |
1945 | } | |
1946 | ||
1947 | fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, | |
1948 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1949 | ||
1950 | atomic_set(&op->state, FCPOP_STATE_ACTIVE); | |
1951 | ||
78a7ac26 | 1952 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d JS |
1953 | blk_mq_start_request(op->rq); |
1954 | ||
1955 | ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, | |
1956 | &ctrl->rport->remoteport, | |
1957 | queue->lldd_handle, &op->fcp_req); | |
1958 | ||
1959 | if (ret) { | |
b4dfd6ee | 1960 | if (op->rq) /* normal request */ |
e399441d | 1961 | nvme_fc_unmap_data(ctrl, op->rq, op); |
e399441d JS |
1962 | /* else - aen. no cleanup needed */ |
1963 | ||
1964 | nvme_fc_ctrl_put(ctrl); | |
1965 | ||
1966 | if (ret != -EBUSY) | |
fc17b653 | 1967 | return BLK_STS_IOERR; |
e399441d JS |
1968 | |
1969 | if (op->rq) { | |
1970 | blk_mq_stop_hw_queues(op->rq->q); | |
1971 | blk_mq_delay_queue(queue->hctx, NVMEFC_QUEUE_DELAY); | |
1972 | } | |
fc17b653 | 1973 | return BLK_STS_RESOURCE; |
e399441d JS |
1974 | } |
1975 | ||
fc17b653 | 1976 | return BLK_STS_OK; |
e399441d JS |
1977 | } |
1978 | ||
fc17b653 | 1979 | static blk_status_t |
e399441d JS |
1980 | nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, |
1981 | const struct blk_mq_queue_data *bd) | |
1982 | { | |
1983 | struct nvme_ns *ns = hctx->queue->queuedata; | |
1984 | struct nvme_fc_queue *queue = hctx->driver_data; | |
1985 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
1986 | struct request *rq = bd->rq; | |
1987 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1988 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1989 | struct nvme_command *sqe = &cmdiu->sqe; | |
1990 | enum nvmefc_fcp_datadir io_dir; | |
1991 | u32 data_len; | |
fc17b653 | 1992 | blk_status_t ret; |
e399441d JS |
1993 | |
1994 | ret = nvme_setup_cmd(ns, rq, sqe); | |
1995 | if (ret) | |
1996 | return ret; | |
1997 | ||
b131c61d | 1998 | data_len = blk_rq_payload_bytes(rq); |
e399441d JS |
1999 | if (data_len) |
2000 | io_dir = ((rq_data_dir(rq) == WRITE) ? | |
2001 | NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); | |
2002 | else | |
2003 | io_dir = NVMEFC_FCP_NODATA; | |
2004 | ||
2005 | return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); | |
2006 | } | |
2007 | ||
2008 | static struct blk_mq_tags * | |
2009 | nvme_fc_tagset(struct nvme_fc_queue *queue) | |
2010 | { | |
2011 | if (queue->qnum == 0) | |
2012 | return queue->ctrl->admin_tag_set.tags[queue->qnum]; | |
2013 | ||
2014 | return queue->ctrl->tag_set.tags[queue->qnum - 1]; | |
2015 | } | |
2016 | ||
2017 | static int | |
2018 | nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) | |
2019 | ||
2020 | { | |
2021 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2022 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2023 | struct request *req; | |
2024 | struct nvme_fc_fcp_op *op; | |
2025 | ||
2026 | req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); | |
61bff8ef | 2027 | if (!req) |
e399441d | 2028 | return 0; |
e399441d JS |
2029 | |
2030 | op = blk_mq_rq_to_pdu(req); | |
2031 | ||
2032 | if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && | |
2033 | (ctrl->lport->ops->poll_queue)) | |
2034 | ctrl->lport->ops->poll_queue(&ctrl->lport->localport, | |
2035 | queue->lldd_handle); | |
2036 | ||
2037 | return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); | |
2038 | } | |
2039 | ||
2040 | static void | |
2041 | nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx) | |
2042 | { | |
2043 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); | |
2044 | struct nvme_fc_fcp_op *aen_op; | |
61bff8ef JS |
2045 | unsigned long flags; |
2046 | bool terminating = false; | |
fc17b653 | 2047 | blk_status_t ret; |
e399441d JS |
2048 | |
2049 | if (aer_idx > NVME_FC_NR_AEN_COMMANDS) | |
2050 | return; | |
2051 | ||
61bff8ef JS |
2052 | spin_lock_irqsave(&ctrl->lock, flags); |
2053 | if (ctrl->flags & FCCTRL_TERMIO) | |
2054 | terminating = true; | |
2055 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2056 | ||
2057 | if (terminating) | |
2058 | return; | |
2059 | ||
e399441d JS |
2060 | aen_op = &ctrl->aen_ops[aer_idx]; |
2061 | ||
2062 | ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, | |
2063 | NVMEFC_FCP_NODATA); | |
2064 | if (ret) | |
2065 | dev_err(ctrl->ctrl.device, | |
2066 | "failed async event work [%d]\n", aer_idx); | |
2067 | } | |
2068 | ||
2069 | static void | |
78a7ac26 | 2070 | __nvme_fc_final_op_cleanup(struct request *rq) |
e399441d JS |
2071 | { |
2072 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2073 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
e399441d | 2074 | |
78a7ac26 JS |
2075 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
2076 | op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | | |
2077 | FCOP_FLAGS_COMPLETE); | |
e399441d | 2078 | |
e399441d | 2079 | nvme_fc_unmap_data(ctrl, rq, op); |
77f02a7a | 2080 | nvme_complete_rq(rq); |
e399441d JS |
2081 | nvme_fc_ctrl_put(ctrl); |
2082 | ||
e399441d JS |
2083 | } |
2084 | ||
78a7ac26 JS |
2085 | static void |
2086 | nvme_fc_complete_rq(struct request *rq) | |
2087 | { | |
2088 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2089 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
2090 | unsigned long flags; | |
2091 | bool completed = false; | |
2092 | ||
2093 | /* | |
2094 | * the core layer, on controller resets after calling | |
2095 | * nvme_shutdown_ctrl(), calls complete_rq without our | |
2096 | * calling blk_mq_complete_request(), thus there may still | |
2097 | * be live i/o outstanding with the LLDD. Means transport has | |
2098 | * to track complete calls vs fcpio_done calls to know what | |
2099 | * path to take on completes and dones. | |
2100 | */ | |
2101 | spin_lock_irqsave(&ctrl->lock, flags); | |
2102 | if (op->flags & FCOP_FLAGS_COMPLETE) | |
2103 | completed = true; | |
2104 | else | |
2105 | op->flags |= FCOP_FLAGS_RELEASED; | |
2106 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2107 | ||
2108 | if (completed) | |
2109 | __nvme_fc_final_op_cleanup(rq); | |
2110 | } | |
2111 | ||
e399441d JS |
2112 | /* |
2113 | * This routine is used by the transport when it needs to find active | |
2114 | * io on a queue that is to be terminated. The transport uses | |
2115 | * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke | |
2116 | * this routine to kill them on a 1 by 1 basis. | |
2117 | * | |
2118 | * As FC allocates FC exchange for each io, the transport must contact | |
2119 | * the LLDD to terminate the exchange, thus releasing the FC exchange. | |
2120 | * After terminating the exchange the LLDD will call the transport's | |
2121 | * normal io done path for the request, but it will have an aborted | |
2122 | * status. The done path will return the io request back to the block | |
2123 | * layer with an error status. | |
2124 | */ | |
2125 | static void | |
2126 | nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) | |
2127 | { | |
2128 | struct nvme_ctrl *nctrl = data; | |
2129 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2130 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); | |
78a7ac26 JS |
2131 | unsigned long flags; |
2132 | int status; | |
e399441d JS |
2133 | |
2134 | if (!blk_mq_request_started(req)) | |
2135 | return; | |
2136 | ||
78a7ac26 | 2137 | spin_lock_irqsave(&ctrl->lock, flags); |
61bff8ef JS |
2138 | if (ctrl->flags & FCCTRL_TERMIO) { |
2139 | ctrl->iocnt++; | |
2140 | op->flags |= FCOP_FLAGS_TERMIO; | |
2141 | } | |
78a7ac26 JS |
2142 | spin_unlock_irqrestore(&ctrl->lock, flags); |
2143 | ||
e399441d | 2144 | status = __nvme_fc_abort_op(ctrl, op); |
78a7ac26 JS |
2145 | if (status) { |
2146 | /* | |
2147 | * if __nvme_fc_abort_op failed the io wasn't | |
2148 | * active. Thus this call path is running in | |
2149 | * parallel to the io complete. Treat as non-error. | |
2150 | */ | |
2151 | ||
2152 | /* back out the flags/counters */ | |
2153 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
2154 | if (ctrl->flags & FCCTRL_TERMIO) |
2155 | ctrl->iocnt--; | |
78a7ac26 JS |
2156 | op->flags &= ~FCOP_FLAGS_TERMIO; |
2157 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
e399441d | 2158 | return; |
78a7ac26 | 2159 | } |
e399441d JS |
2160 | } |
2161 | ||
78a7ac26 | 2162 | |
61bff8ef JS |
2163 | static const struct blk_mq_ops nvme_fc_mq_ops = { |
2164 | .queue_rq = nvme_fc_queue_rq, | |
2165 | .complete = nvme_fc_complete_rq, | |
2166 | .init_request = nvme_fc_init_request, | |
2167 | .exit_request = nvme_fc_exit_request, | |
2168 | .reinit_request = nvme_fc_reinit_request, | |
2169 | .init_hctx = nvme_fc_init_hctx, | |
2170 | .poll = nvme_fc_poll, | |
2171 | .timeout = nvme_fc_timeout, | |
2172 | }; | |
e399441d | 2173 | |
61bff8ef JS |
2174 | static int |
2175 | nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) | |
e399441d | 2176 | { |
61bff8ef JS |
2177 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; |
2178 | int ret; | |
e399441d | 2179 | |
61bff8ef JS |
2180 | ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues); |
2181 | if (ret) { | |
2182 | dev_info(ctrl->ctrl.device, | |
2183 | "set_queue_count failed: %d\n", ret); | |
2184 | return ret; | |
2185 | } | |
e399441d | 2186 | |
61bff8ef JS |
2187 | ctrl->queue_count = opts->nr_io_queues + 1; |
2188 | if (!opts->nr_io_queues) | |
2189 | return 0; | |
e399441d | 2190 | |
61bff8ef | 2191 | nvme_fc_init_io_queues(ctrl); |
e399441d | 2192 | |
61bff8ef JS |
2193 | memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); |
2194 | ctrl->tag_set.ops = &nvme_fc_mq_ops; | |
2195 | ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; | |
2196 | ctrl->tag_set.reserved_tags = 1; /* fabric connect */ | |
2197 | ctrl->tag_set.numa_node = NUMA_NO_NODE; | |
2198 | ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; | |
2199 | ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
2200 | (SG_CHUNK_SIZE * | |
2201 | sizeof(struct scatterlist)) + | |
2202 | ctrl->lport->ops->fcprqst_priv_sz; | |
2203 | ctrl->tag_set.driver_data = ctrl; | |
2204 | ctrl->tag_set.nr_hw_queues = ctrl->queue_count - 1; | |
2205 | ctrl->tag_set.timeout = NVME_IO_TIMEOUT; | |
e399441d | 2206 | |
61bff8ef JS |
2207 | ret = blk_mq_alloc_tag_set(&ctrl->tag_set); |
2208 | if (ret) | |
2209 | return ret; | |
e399441d | 2210 | |
61bff8ef | 2211 | ctrl->ctrl.tagset = &ctrl->tag_set; |
e399441d | 2212 | |
61bff8ef JS |
2213 | ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); |
2214 | if (IS_ERR(ctrl->ctrl.connect_q)) { | |
2215 | ret = PTR_ERR(ctrl->ctrl.connect_q); | |
2216 | goto out_free_tag_set; | |
2217 | } | |
e399441d | 2218 | |
61bff8ef | 2219 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
e399441d | 2220 | if (ret) |
61bff8ef | 2221 | goto out_cleanup_blk_queue; |
e399441d | 2222 | |
61bff8ef JS |
2223 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
2224 | if (ret) | |
2225 | goto out_delete_hw_queues; | |
e399441d JS |
2226 | |
2227 | return 0; | |
e399441d | 2228 | |
61bff8ef JS |
2229 | out_delete_hw_queues: |
2230 | nvme_fc_delete_hw_io_queues(ctrl); | |
2231 | out_cleanup_blk_queue: | |
2232 | nvme_stop_keep_alive(&ctrl->ctrl); | |
2233 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
2234 | out_free_tag_set: | |
2235 | blk_mq_free_tag_set(&ctrl->tag_set); | |
2236 | nvme_fc_free_io_queues(ctrl); | |
e399441d | 2237 | |
61bff8ef JS |
2238 | /* force put free routine to ignore io queues */ |
2239 | ctrl->ctrl.tagset = NULL; | |
2240 | ||
2241 | return ret; | |
2242 | } | |
e399441d JS |
2243 | |
2244 | static int | |
61bff8ef | 2245 | nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
2246 | { |
2247 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
2248 | int ret; | |
2249 | ||
2250 | ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues); | |
2251 | if (ret) { | |
2252 | dev_info(ctrl->ctrl.device, | |
2253 | "set_queue_count failed: %d\n", ret); | |
2254 | return ret; | |
2255 | } | |
2256 | ||
61bff8ef JS |
2257 | /* check for io queues existing */ |
2258 | if (ctrl->queue_count == 1) | |
e399441d JS |
2259 | return 0; |
2260 | ||
e399441d JS |
2261 | nvme_fc_init_io_queues(ctrl); |
2262 | ||
61bff8ef | 2263 | ret = blk_mq_reinit_tagset(&ctrl->tag_set); |
e399441d | 2264 | if (ret) |
61bff8ef | 2265 | goto out_free_io_queues; |
e399441d JS |
2266 | |
2267 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2268 | if (ret) | |
61bff8ef | 2269 | goto out_free_io_queues; |
e399441d JS |
2270 | |
2271 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2272 | if (ret) | |
2273 | goto out_delete_hw_queues; | |
2274 | ||
2275 | return 0; | |
2276 | ||
2277 | out_delete_hw_queues: | |
2278 | nvme_fc_delete_hw_io_queues(ctrl); | |
61bff8ef | 2279 | out_free_io_queues: |
e399441d | 2280 | nvme_fc_free_io_queues(ctrl); |
61bff8ef JS |
2281 | return ret; |
2282 | } | |
e399441d | 2283 | |
61bff8ef JS |
2284 | /* |
2285 | * This routine restarts the controller on the host side, and | |
2286 | * on the link side, recreates the controller association. | |
2287 | */ | |
2288 | static int | |
2289 | nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) | |
2290 | { | |
2291 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
2292 | u32 segs; | |
2293 | int ret; | |
2294 | bool changed; | |
2295 | ||
fdf9dfa8 | 2296 | ++ctrl->ctrl.nr_reconnects; |
61bff8ef JS |
2297 | |
2298 | /* | |
2299 | * Create the admin queue | |
2300 | */ | |
2301 | ||
2302 | nvme_fc_init_queue(ctrl, 0, NVME_FC_AQ_BLKMQ_DEPTH); | |
2303 | ||
2304 | ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, | |
2305 | NVME_FC_AQ_BLKMQ_DEPTH); | |
2306 | if (ret) | |
2307 | goto out_free_queue; | |
2308 | ||
2309 | ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], | |
2310 | NVME_FC_AQ_BLKMQ_DEPTH, | |
2311 | (NVME_FC_AQ_BLKMQ_DEPTH / 4)); | |
2312 | if (ret) | |
2313 | goto out_delete_hw_queue; | |
2314 | ||
2315 | if (ctrl->ctrl.state != NVME_CTRL_NEW) | |
2316 | blk_mq_start_stopped_hw_queues(ctrl->ctrl.admin_q, true); | |
2317 | ||
2318 | ret = nvmf_connect_admin_queue(&ctrl->ctrl); | |
2319 | if (ret) | |
2320 | goto out_disconnect_admin_queue; | |
2321 | ||
2322 | /* | |
2323 | * Check controller capabilities | |
2324 | * | |
2325 | * todo:- add code to check if ctrl attributes changed from | |
2326 | * prior connection values | |
2327 | */ | |
2328 | ||
2329 | ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->cap); | |
2330 | if (ret) { | |
2331 | dev_err(ctrl->ctrl.device, | |
2332 | "prop_get NVME_REG_CAP failed\n"); | |
2333 | goto out_disconnect_admin_queue; | |
2334 | } | |
2335 | ||
2336 | ctrl->ctrl.sqsize = | |
2337 | min_t(int, NVME_CAP_MQES(ctrl->cap) + 1, ctrl->ctrl.sqsize); | |
2338 | ||
2339 | ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->cap); | |
2340 | if (ret) | |
2341 | goto out_disconnect_admin_queue; | |
2342 | ||
2343 | segs = min_t(u32, NVME_FC_MAX_SEGMENTS, | |
2344 | ctrl->lport->ops->max_sgl_segments); | |
2345 | ctrl->ctrl.max_hw_sectors = (segs - 1) << (PAGE_SHIFT - 9); | |
2346 | ||
2347 | ret = nvme_init_identify(&ctrl->ctrl); | |
2348 | if (ret) | |
2349 | goto out_disconnect_admin_queue; | |
2350 | ||
2351 | /* sanity checks */ | |
2352 | ||
2353 | /* FC-NVME does not have other data in the capsule */ | |
2354 | if (ctrl->ctrl.icdoff) { | |
2355 | dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", | |
2356 | ctrl->ctrl.icdoff); | |
2357 | goto out_disconnect_admin_queue; | |
2358 | } | |
2359 | ||
2360 | nvme_start_keep_alive(&ctrl->ctrl); | |
2361 | ||
2362 | /* FC-NVME supports normal SGL Data Block Descriptors */ | |
2363 | ||
2364 | if (opts->queue_size > ctrl->ctrl.maxcmd) { | |
2365 | /* warn if maxcmd is lower than queue_size */ | |
2366 | dev_warn(ctrl->ctrl.device, | |
2367 | "queue_size %zu > ctrl maxcmd %u, reducing " | |
2368 | "to queue_size\n", | |
2369 | opts->queue_size, ctrl->ctrl.maxcmd); | |
2370 | opts->queue_size = ctrl->ctrl.maxcmd; | |
2371 | } | |
2372 | ||
2373 | ret = nvme_fc_init_aen_ops(ctrl); | |
2374 | if (ret) | |
2375 | goto out_term_aen_ops; | |
2376 | ||
2377 | /* | |
2378 | * Create the io queues | |
2379 | */ | |
2380 | ||
2381 | if (ctrl->queue_count > 1) { | |
2382 | if (ctrl->ctrl.state == NVME_CTRL_NEW) | |
2383 | ret = nvme_fc_create_io_queues(ctrl); | |
2384 | else | |
2385 | ret = nvme_fc_reinit_io_queues(ctrl); | |
2386 | if (ret) | |
2387 | goto out_term_aen_ops; | |
2388 | } | |
2389 | ||
2390 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
2391 | WARN_ON_ONCE(!changed); | |
2392 | ||
fdf9dfa8 | 2393 | ctrl->ctrl.nr_reconnects = 0; |
61bff8ef | 2394 | |
61bff8ef JS |
2395 | if (ctrl->queue_count > 1) { |
2396 | nvme_start_queues(&ctrl->ctrl); | |
2397 | nvme_queue_scan(&ctrl->ctrl); | |
2398 | nvme_queue_async_events(&ctrl->ctrl); | |
2399 | } | |
2400 | ||
2401 | return 0; /* Success */ | |
2402 | ||
2403 | out_term_aen_ops: | |
2404 | nvme_fc_term_aen_ops(ctrl); | |
2405 | nvme_stop_keep_alive(&ctrl->ctrl); | |
2406 | out_disconnect_admin_queue: | |
2407 | /* send a Disconnect(association) LS to fc-nvme target */ | |
2408 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2409 | out_delete_hw_queue: | |
2410 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2411 | out_free_queue: | |
2412 | nvme_fc_free_queue(&ctrl->queues[0]); | |
e399441d JS |
2413 | |
2414 | return ret; | |
2415 | } | |
2416 | ||
61bff8ef JS |
2417 | /* |
2418 | * This routine stops operation of the controller on the host side. | |
2419 | * On the host os stack side: Admin and IO queues are stopped, | |
2420 | * outstanding ios on them terminated via FC ABTS. | |
2421 | * On the link side: the association is terminated. | |
2422 | */ | |
2423 | static void | |
2424 | nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) | |
2425 | { | |
2426 | unsigned long flags; | |
2427 | ||
2428 | nvme_stop_keep_alive(&ctrl->ctrl); | |
2429 | ||
2430 | spin_lock_irqsave(&ctrl->lock, flags); | |
2431 | ctrl->flags |= FCCTRL_TERMIO; | |
2432 | ctrl->iocnt = 0; | |
2433 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2434 | ||
2435 | /* | |
2436 | * If io queues are present, stop them and terminate all outstanding | |
2437 | * ios on them. As FC allocates FC exchange for each io, the | |
2438 | * transport must contact the LLDD to terminate the exchange, | |
2439 | * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() | |
2440 | * to tell us what io's are busy and invoke a transport routine | |
2441 | * to kill them with the LLDD. After terminating the exchange | |
2442 | * the LLDD will call the transport's normal io done path, but it | |
2443 | * will have an aborted status. The done path will return the | |
2444 | * io requests back to the block layer as part of normal completions | |
2445 | * (but with error status). | |
2446 | */ | |
2447 | if (ctrl->queue_count > 1) { | |
2448 | nvme_stop_queues(&ctrl->ctrl); | |
2449 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
2450 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2451 | } | |
2452 | ||
2453 | /* | |
2454 | * Other transports, which don't have link-level contexts bound | |
2455 | * to sqe's, would try to gracefully shutdown the controller by | |
2456 | * writing the registers for shutdown and polling (call | |
2457 | * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially | |
2458 | * just aborted and we will wait on those contexts, and given | |
2459 | * there was no indication of how live the controlelr is on the | |
2460 | * link, don't send more io to create more contexts for the | |
2461 | * shutdown. Let the controller fail via keepalive failure if | |
2462 | * its still present. | |
2463 | */ | |
2464 | ||
2465 | /* | |
2466 | * clean up the admin queue. Same thing as above. | |
2467 | * use blk_mq_tagset_busy_itr() and the transport routine to | |
2468 | * terminate the exchanges. | |
2469 | */ | |
2470 | blk_mq_stop_hw_queues(ctrl->ctrl.admin_q); | |
2471 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, | |
2472 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2473 | ||
2474 | /* kill the aens as they are a separate path */ | |
2475 | nvme_fc_abort_aen_ops(ctrl); | |
2476 | ||
2477 | /* wait for all io that had to be aborted */ | |
2478 | spin_lock_irqsave(&ctrl->lock, flags); | |
2479 | while (ctrl->iocnt) { | |
2480 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2481 | msleep(1000); | |
2482 | spin_lock_irqsave(&ctrl->lock, flags); | |
2483 | } | |
2484 | ctrl->flags &= ~FCCTRL_TERMIO; | |
2485 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2486 | ||
2487 | nvme_fc_term_aen_ops(ctrl); | |
2488 | ||
2489 | /* | |
2490 | * send a Disconnect(association) LS to fc-nvme target | |
2491 | * Note: could have been sent at top of process, but | |
2492 | * cleaner on link traffic if after the aborts complete. | |
2493 | * Note: if association doesn't exist, association_id will be 0 | |
2494 | */ | |
2495 | if (ctrl->association_id) | |
2496 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2497 | ||
2498 | if (ctrl->ctrl.tagset) { | |
2499 | nvme_fc_delete_hw_io_queues(ctrl); | |
2500 | nvme_fc_free_io_queues(ctrl); | |
2501 | } | |
2502 | ||
2503 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2504 | nvme_fc_free_queue(&ctrl->queues[0]); | |
2505 | } | |
2506 | ||
2507 | static void | |
2508 | nvme_fc_delete_ctrl_work(struct work_struct *work) | |
2509 | { | |
2510 | struct nvme_fc_ctrl *ctrl = | |
2511 | container_of(work, struct nvme_fc_ctrl, delete_work); | |
2512 | ||
d86c4d8e | 2513 | cancel_work_sync(&ctrl->ctrl.reset_work); |
61bff8ef JS |
2514 | cancel_delayed_work_sync(&ctrl->connect_work); |
2515 | ||
2516 | /* | |
2517 | * kill the association on the link side. this will block | |
2518 | * waiting for io to terminate | |
2519 | */ | |
2520 | nvme_fc_delete_association(ctrl); | |
2521 | ||
2522 | /* | |
2523 | * tear down the controller | |
a5321aa5 JS |
2524 | * After the last reference on the nvme ctrl is removed, |
2525 | * the transport nvme_fc_nvme_ctrl_freed() callback will be | |
2526 | * invoked. From there, the transport will tear down it's | |
2527 | * logical queues and association. | |
61bff8ef JS |
2528 | */ |
2529 | nvme_uninit_ctrl(&ctrl->ctrl); | |
2530 | ||
2531 | nvme_put_ctrl(&ctrl->ctrl); | |
2532 | } | |
2533 | ||
5bbecdbc JS |
2534 | static bool |
2535 | __nvme_fc_schedule_delete_work(struct nvme_fc_ctrl *ctrl) | |
61bff8ef JS |
2536 | { |
2537 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) | |
5bbecdbc | 2538 | return true; |
61bff8ef | 2539 | |
9a6327d2 | 2540 | if (!queue_work(nvme_wq, &ctrl->delete_work)) |
5bbecdbc | 2541 | return true; |
61bff8ef | 2542 | |
5bbecdbc JS |
2543 | return false; |
2544 | } | |
2545 | ||
2546 | static int | |
2547 | __nvme_fc_del_ctrl(struct nvme_fc_ctrl *ctrl) | |
2548 | { | |
2549 | return __nvme_fc_schedule_delete_work(ctrl) ? -EBUSY : 0; | |
61bff8ef JS |
2550 | } |
2551 | ||
2552 | /* | |
2553 | * Request from nvme core layer to delete the controller | |
2554 | */ | |
2555 | static int | |
2556 | nvme_fc_del_nvme_ctrl(struct nvme_ctrl *nctrl) | |
2557 | { | |
2558 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2559 | int ret; | |
2560 | ||
2561 | if (!kref_get_unless_zero(&ctrl->ctrl.kref)) | |
2562 | return -EBUSY; | |
2563 | ||
2564 | ret = __nvme_fc_del_ctrl(ctrl); | |
2565 | ||
2566 | if (!ret) | |
9a6327d2 | 2567 | flush_workqueue(nvme_wq); |
61bff8ef JS |
2568 | |
2569 | nvme_put_ctrl(&ctrl->ctrl); | |
2570 | ||
2571 | return ret; | |
2572 | } | |
2573 | ||
5bbecdbc JS |
2574 | static void |
2575 | nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) | |
2576 | { | |
2577 | /* If we are resetting/deleting then do nothing */ | |
2578 | if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) { | |
2579 | WARN_ON_ONCE(ctrl->ctrl.state == NVME_CTRL_NEW || | |
2580 | ctrl->ctrl.state == NVME_CTRL_LIVE); | |
2581 | return; | |
2582 | } | |
2583 | ||
589ff775 | 2584 | dev_info(ctrl->ctrl.device, |
5bbecdbc JS |
2585 | "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", |
2586 | ctrl->cnum, status); | |
2587 | ||
2588 | if (nvmf_should_reconnect(&ctrl->ctrl)) { | |
2589 | dev_info(ctrl->ctrl.device, | |
2590 | "NVME-FC{%d}: Reconnect attempt in %d seconds.\n", | |
2591 | ctrl->cnum, ctrl->ctrl.opts->reconnect_delay); | |
9a6327d2 | 2592 | queue_delayed_work(nvme_wq, &ctrl->connect_work, |
5bbecdbc JS |
2593 | ctrl->ctrl.opts->reconnect_delay * HZ); |
2594 | } else { | |
589ff775 | 2595 | dev_warn(ctrl->ctrl.device, |
5bbecdbc JS |
2596 | "NVME-FC{%d}: Max reconnect attempts (%d) " |
2597 | "reached. Removing controller\n", | |
fdf9dfa8 | 2598 | ctrl->cnum, ctrl->ctrl.nr_reconnects); |
5bbecdbc JS |
2599 | WARN_ON(__nvme_fc_schedule_delete_work(ctrl)); |
2600 | } | |
2601 | } | |
2602 | ||
61bff8ef JS |
2603 | static void |
2604 | nvme_fc_reset_ctrl_work(struct work_struct *work) | |
2605 | { | |
2606 | struct nvme_fc_ctrl *ctrl = | |
d86c4d8e | 2607 | container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); |
61bff8ef JS |
2608 | int ret; |
2609 | ||
2610 | /* will block will waiting for io to terminate */ | |
2611 | nvme_fc_delete_association(ctrl); | |
2612 | ||
2613 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
2614 | if (ret) |
2615 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2616 | else | |
61bff8ef JS |
2617 | dev_info(ctrl->ctrl.device, |
2618 | "NVME-FC{%d}: controller reset complete\n", ctrl->cnum); | |
2619 | } | |
2620 | ||
61bff8ef JS |
2621 | static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { |
2622 | .name = "fc", | |
2623 | .module = THIS_MODULE, | |
d3d5b87d | 2624 | .flags = NVME_F_FABRICS, |
61bff8ef JS |
2625 | .reg_read32 = nvmf_reg_read32, |
2626 | .reg_read64 = nvmf_reg_read64, | |
2627 | .reg_write32 = nvmf_reg_write32, | |
61bff8ef JS |
2628 | .free_ctrl = nvme_fc_nvme_ctrl_freed, |
2629 | .submit_async_event = nvme_fc_submit_async_event, | |
2630 | .delete_ctrl = nvme_fc_del_nvme_ctrl, | |
61bff8ef JS |
2631 | .get_address = nvmf_get_address, |
2632 | }; | |
2633 | ||
2634 | static void | |
2635 | nvme_fc_connect_ctrl_work(struct work_struct *work) | |
2636 | { | |
2637 | int ret; | |
2638 | ||
2639 | struct nvme_fc_ctrl *ctrl = | |
2640 | container_of(to_delayed_work(work), | |
2641 | struct nvme_fc_ctrl, connect_work); | |
2642 | ||
2643 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
2644 | if (ret) |
2645 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2646 | else | |
61bff8ef JS |
2647 | dev_info(ctrl->ctrl.device, |
2648 | "NVME-FC{%d}: controller reconnect complete\n", | |
2649 | ctrl->cnum); | |
2650 | } | |
2651 | ||
2652 | ||
2653 | static const struct blk_mq_ops nvme_fc_admin_mq_ops = { | |
2654 | .queue_rq = nvme_fc_queue_rq, | |
2655 | .complete = nvme_fc_complete_rq, | |
76f983cb | 2656 | .init_request = nvme_fc_init_request, |
61bff8ef JS |
2657 | .exit_request = nvme_fc_exit_request, |
2658 | .reinit_request = nvme_fc_reinit_request, | |
2659 | .init_hctx = nvme_fc_init_admin_hctx, | |
2660 | .timeout = nvme_fc_timeout, | |
2661 | }; | |
2662 | ||
e399441d JS |
2663 | |
2664 | static struct nvme_ctrl * | |
61bff8ef | 2665 | nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, |
e399441d JS |
2666 | struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) |
2667 | { | |
2668 | struct nvme_fc_ctrl *ctrl; | |
2669 | unsigned long flags; | |
2670 | int ret, idx; | |
e399441d | 2671 | |
85e6a6ad JS |
2672 | if (!(rport->remoteport.port_role & |
2673 | (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { | |
2674 | ret = -EBADR; | |
2675 | goto out_fail; | |
2676 | } | |
2677 | ||
e399441d JS |
2678 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
2679 | if (!ctrl) { | |
2680 | ret = -ENOMEM; | |
2681 | goto out_fail; | |
2682 | } | |
2683 | ||
2684 | idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); | |
2685 | if (idx < 0) { | |
2686 | ret = -ENOSPC; | |
2687 | goto out_free_ctrl; | |
2688 | } | |
2689 | ||
2690 | ctrl->ctrl.opts = opts; | |
2691 | INIT_LIST_HEAD(&ctrl->ctrl_list); | |
e399441d JS |
2692 | ctrl->lport = lport; |
2693 | ctrl->rport = rport; | |
2694 | ctrl->dev = lport->dev; | |
e399441d JS |
2695 | ctrl->cnum = idx; |
2696 | ||
e399441d JS |
2697 | get_device(ctrl->dev); |
2698 | kref_init(&ctrl->ref); | |
2699 | ||
61bff8ef | 2700 | INIT_WORK(&ctrl->delete_work, nvme_fc_delete_ctrl_work); |
d86c4d8e | 2701 | INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); |
61bff8ef | 2702 | INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); |
e399441d JS |
2703 | spin_lock_init(&ctrl->lock); |
2704 | ||
2705 | /* io queue count */ | |
2706 | ctrl->queue_count = min_t(unsigned int, | |
2707 | opts->nr_io_queues, | |
2708 | lport->ops->max_hw_queues); | |
2709 | opts->nr_io_queues = ctrl->queue_count; /* so opts has valid value */ | |
2710 | ctrl->queue_count++; /* +1 for admin queue */ | |
2711 | ||
2712 | ctrl->ctrl.sqsize = opts->queue_size - 1; | |
2713 | ctrl->ctrl.kato = opts->kato; | |
2714 | ||
2715 | ret = -ENOMEM; | |
2716 | ctrl->queues = kcalloc(ctrl->queue_count, sizeof(struct nvme_fc_queue), | |
2717 | GFP_KERNEL); | |
2718 | if (!ctrl->queues) | |
61bff8ef | 2719 | goto out_free_ida; |
e399441d | 2720 | |
61bff8ef JS |
2721 | memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); |
2722 | ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; | |
2723 | ctrl->admin_tag_set.queue_depth = NVME_FC_AQ_BLKMQ_DEPTH; | |
2724 | ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ | |
2725 | ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; | |
2726 | ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
2727 | (SG_CHUNK_SIZE * | |
2728 | sizeof(struct scatterlist)) + | |
2729 | ctrl->lport->ops->fcprqst_priv_sz; | |
2730 | ctrl->admin_tag_set.driver_data = ctrl; | |
2731 | ctrl->admin_tag_set.nr_hw_queues = 1; | |
2732 | ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; | |
e399441d | 2733 | |
61bff8ef | 2734 | ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); |
e399441d | 2735 | if (ret) |
61bff8ef | 2736 | goto out_free_queues; |
e399441d | 2737 | |
61bff8ef JS |
2738 | ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); |
2739 | if (IS_ERR(ctrl->ctrl.admin_q)) { | |
2740 | ret = PTR_ERR(ctrl->ctrl.admin_q); | |
2741 | goto out_free_admin_tag_set; | |
e399441d JS |
2742 | } |
2743 | ||
61bff8ef JS |
2744 | /* |
2745 | * Would have been nice to init io queues tag set as well. | |
2746 | * However, we require interaction from the controller | |
2747 | * for max io queue count before we can do so. | |
2748 | * Defer this to the connect path. | |
2749 | */ | |
e399441d | 2750 | |
61bff8ef JS |
2751 | ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); |
2752 | if (ret) | |
2753 | goto out_cleanup_admin_q; | |
e399441d | 2754 | |
61bff8ef | 2755 | /* at this point, teardown path changes to ref counting on nvme ctrl */ |
e399441d JS |
2756 | |
2757 | spin_lock_irqsave(&rport->lock, flags); | |
2758 | list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); | |
2759 | spin_unlock_irqrestore(&rport->lock, flags); | |
2760 | ||
61bff8ef JS |
2761 | ret = nvme_fc_create_association(ctrl); |
2762 | if (ret) { | |
de41447a | 2763 | ctrl->ctrl.opts = NULL; |
61bff8ef JS |
2764 | /* initiate nvme ctrl ref counting teardown */ |
2765 | nvme_uninit_ctrl(&ctrl->ctrl); | |
24b7f059 | 2766 | nvme_put_ctrl(&ctrl->ctrl); |
61bff8ef JS |
2767 | |
2768 | /* as we're past the point where we transition to the ref | |
2769 | * counting teardown path, if we return a bad pointer here, | |
2770 | * the calling routine, thinking it's prior to the | |
2771 | * transition, will do an rport put. Since the teardown | |
2772 | * path also does a rport put, we do an extra get here to | |
2773 | * so proper order/teardown happens. | |
2774 | */ | |
2775 | nvme_fc_rport_get(rport); | |
2776 | ||
2777 | if (ret > 0) | |
2778 | ret = -EIO; | |
2779 | return ERR_PTR(ret); | |
e399441d JS |
2780 | } |
2781 | ||
2cb657bc JS |
2782 | kref_get(&ctrl->ctrl.kref); |
2783 | ||
61bff8ef JS |
2784 | dev_info(ctrl->ctrl.device, |
2785 | "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", | |
2786 | ctrl->cnum, ctrl->ctrl.opts->subsysnqn); | |
e399441d | 2787 | |
61bff8ef | 2788 | return &ctrl->ctrl; |
e399441d | 2789 | |
61bff8ef JS |
2790 | out_cleanup_admin_q: |
2791 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
2792 | out_free_admin_tag_set: | |
2793 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
2794 | out_free_queues: | |
2795 | kfree(ctrl->queues); | |
e399441d | 2796 | out_free_ida: |
61bff8ef | 2797 | put_device(ctrl->dev); |
e399441d JS |
2798 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
2799 | out_free_ctrl: | |
2800 | kfree(ctrl); | |
2801 | out_fail: | |
e399441d JS |
2802 | /* exit via here doesn't follow ctlr ref points */ |
2803 | return ERR_PTR(ret); | |
2804 | } | |
2805 | ||
2806 | enum { | |
2807 | FCT_TRADDR_ERR = 0, | |
2808 | FCT_TRADDR_WWNN = 1 << 0, | |
2809 | FCT_TRADDR_WWPN = 1 << 1, | |
2810 | }; | |
2811 | ||
2812 | struct nvmet_fc_traddr { | |
2813 | u64 nn; | |
2814 | u64 pn; | |
2815 | }; | |
2816 | ||
2817 | static const match_table_t traddr_opt_tokens = { | |
2818 | { FCT_TRADDR_WWNN, "nn-%s" }, | |
2819 | { FCT_TRADDR_WWPN, "pn-%s" }, | |
2820 | { FCT_TRADDR_ERR, NULL } | |
2821 | }; | |
2822 | ||
2823 | static int | |
2824 | nvme_fc_parse_address(struct nvmet_fc_traddr *traddr, char *buf) | |
2825 | { | |
2826 | substring_t args[MAX_OPT_ARGS]; | |
2827 | char *options, *o, *p; | |
2828 | int token, ret = 0; | |
2829 | u64 token64; | |
2830 | ||
2831 | options = o = kstrdup(buf, GFP_KERNEL); | |
2832 | if (!options) | |
2833 | return -ENOMEM; | |
2834 | ||
2835 | while ((p = strsep(&o, ":\n")) != NULL) { | |
2836 | if (!*p) | |
2837 | continue; | |
2838 | ||
2839 | token = match_token(p, traddr_opt_tokens, args); | |
2840 | switch (token) { | |
2841 | case FCT_TRADDR_WWNN: | |
2842 | if (match_u64(args, &token64)) { | |
2843 | ret = -EINVAL; | |
2844 | goto out; | |
2845 | } | |
2846 | traddr->nn = token64; | |
2847 | break; | |
2848 | case FCT_TRADDR_WWPN: | |
2849 | if (match_u64(args, &token64)) { | |
2850 | ret = -EINVAL; | |
2851 | goto out; | |
2852 | } | |
2853 | traddr->pn = token64; | |
2854 | break; | |
2855 | default: | |
2856 | pr_warn("unknown traddr token or missing value '%s'\n", | |
2857 | p); | |
2858 | ret = -EINVAL; | |
2859 | goto out; | |
2860 | } | |
2861 | } | |
2862 | ||
2863 | out: | |
2864 | kfree(options); | |
2865 | return ret; | |
2866 | } | |
2867 | ||
2868 | static struct nvme_ctrl * | |
2869 | nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) | |
2870 | { | |
2871 | struct nvme_fc_lport *lport; | |
2872 | struct nvme_fc_rport *rport; | |
61bff8ef | 2873 | struct nvme_ctrl *ctrl; |
e399441d JS |
2874 | struct nvmet_fc_traddr laddr = { 0L, 0L }; |
2875 | struct nvmet_fc_traddr raddr = { 0L, 0L }; | |
2876 | unsigned long flags; | |
2877 | int ret; | |
2878 | ||
2879 | ret = nvme_fc_parse_address(&raddr, opts->traddr); | |
2880 | if (ret || !raddr.nn || !raddr.pn) | |
2881 | return ERR_PTR(-EINVAL); | |
2882 | ||
2883 | ret = nvme_fc_parse_address(&laddr, opts->host_traddr); | |
2884 | if (ret || !laddr.nn || !laddr.pn) | |
2885 | return ERR_PTR(-EINVAL); | |
2886 | ||
2887 | /* find the host and remote ports to connect together */ | |
2888 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
2889 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
2890 | if (lport->localport.node_name != laddr.nn || | |
2891 | lport->localport.port_name != laddr.pn) | |
2892 | continue; | |
2893 | ||
2894 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
2895 | if (rport->remoteport.node_name != raddr.nn || | |
2896 | rport->remoteport.port_name != raddr.pn) | |
2897 | continue; | |
2898 | ||
2899 | /* if fail to get reference fall through. Will error */ | |
2900 | if (!nvme_fc_rport_get(rport)) | |
2901 | break; | |
2902 | ||
2903 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
2904 | ||
61bff8ef JS |
2905 | ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); |
2906 | if (IS_ERR(ctrl)) | |
2907 | nvme_fc_rport_put(rport); | |
2908 | return ctrl; | |
e399441d JS |
2909 | } |
2910 | } | |
2911 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
2912 | ||
2913 | return ERR_PTR(-ENOENT); | |
2914 | } | |
2915 | ||
2916 | ||
2917 | static struct nvmf_transport_ops nvme_fc_transport = { | |
2918 | .name = "fc", | |
2919 | .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, | |
5bbecdbc | 2920 | .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, |
e399441d JS |
2921 | .create_ctrl = nvme_fc_create_ctrl, |
2922 | }; | |
2923 | ||
2924 | static int __init nvme_fc_init_module(void) | |
2925 | { | |
9a6327d2 | 2926 | return nvmf_register_transport(&nvme_fc_transport); |
e399441d JS |
2927 | } |
2928 | ||
2929 | static void __exit nvme_fc_exit_module(void) | |
2930 | { | |
2931 | /* sanity check - all lports should be removed */ | |
2932 | if (!list_empty(&nvme_fc_lport_list)) | |
2933 | pr_warn("%s: localport list not empty\n", __func__); | |
2934 | ||
2935 | nvmf_unregister_transport(&nvme_fc_transport); | |
2936 | ||
e399441d JS |
2937 | ida_destroy(&nvme_fc_local_port_cnt); |
2938 | ida_destroy(&nvme_fc_ctrl_cnt); | |
2939 | } | |
2940 | ||
2941 | module_init(nvme_fc_init_module); | |
2942 | module_exit(nvme_fc_exit_module); | |
2943 | ||
2944 | MODULE_LICENSE("GPL v2"); |