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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 | ||
e399441d | 33 | enum nvme_fc_queue_flags { |
26c0a26d JA |
34 | NVME_FC_Q_CONNECTED = 0, |
35 | NVME_FC_Q_LIVE, | |
e399441d JS |
36 | }; |
37 | ||
38 | #define NVMEFC_QUEUE_DELAY 3 /* ms units */ | |
39 | ||
ac7fe82b JS |
40 | #define NVME_FC_DEFAULT_DEV_LOSS_TMO 60 /* seconds */ |
41 | ||
e399441d JS |
42 | struct nvme_fc_queue { |
43 | struct nvme_fc_ctrl *ctrl; | |
44 | struct device *dev; | |
45 | struct blk_mq_hw_ctx *hctx; | |
46 | void *lldd_handle; | |
e399441d JS |
47 | size_t cmnd_capsule_len; |
48 | u32 qnum; | |
49 | u32 rqcnt; | |
50 | u32 seqno; | |
51 | ||
52 | u64 connection_id; | |
53 | atomic_t csn; | |
54 | ||
55 | unsigned long flags; | |
56 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
57 | ||
8d64daf7 JS |
58 | enum nvme_fcop_flags { |
59 | FCOP_FLAGS_TERMIO = (1 << 0), | |
60 | FCOP_FLAGS_RELEASED = (1 << 1), | |
61 | FCOP_FLAGS_COMPLETE = (1 << 2), | |
78a7ac26 | 62 | FCOP_FLAGS_AEN = (1 << 3), |
8d64daf7 JS |
63 | }; |
64 | ||
e399441d JS |
65 | struct nvmefc_ls_req_op { |
66 | struct nvmefc_ls_req ls_req; | |
67 | ||
c913a8b0 | 68 | struct nvme_fc_rport *rport; |
e399441d JS |
69 | struct nvme_fc_queue *queue; |
70 | struct request *rq; | |
8d64daf7 | 71 | u32 flags; |
e399441d JS |
72 | |
73 | int ls_error; | |
74 | struct completion ls_done; | |
c913a8b0 | 75 | struct list_head lsreq_list; /* rport->ls_req_list */ |
e399441d JS |
76 | bool req_queued; |
77 | }; | |
78 | ||
79 | enum nvme_fcpop_state { | |
80 | FCPOP_STATE_UNINIT = 0, | |
81 | FCPOP_STATE_IDLE = 1, | |
82 | FCPOP_STATE_ACTIVE = 2, | |
83 | FCPOP_STATE_ABORTED = 3, | |
78a7ac26 | 84 | FCPOP_STATE_COMPLETE = 4, |
e399441d JS |
85 | }; |
86 | ||
87 | struct nvme_fc_fcp_op { | |
88 | struct nvme_request nreq; /* | |
89 | * nvme/host/core.c | |
90 | * requires this to be | |
91 | * the 1st element in the | |
92 | * private structure | |
93 | * associated with the | |
94 | * request. | |
95 | */ | |
96 | struct nvmefc_fcp_req fcp_req; | |
97 | ||
98 | struct nvme_fc_ctrl *ctrl; | |
99 | struct nvme_fc_queue *queue; | |
100 | struct request *rq; | |
101 | ||
102 | atomic_t state; | |
78a7ac26 | 103 | u32 flags; |
e399441d JS |
104 | u32 rqno; |
105 | u32 nents; | |
106 | ||
107 | struct nvme_fc_cmd_iu cmd_iu; | |
108 | struct nvme_fc_ersp_iu rsp_iu; | |
109 | }; | |
110 | ||
111 | struct nvme_fc_lport { | |
112 | struct nvme_fc_local_port localport; | |
113 | ||
114 | struct ida endp_cnt; | |
115 | struct list_head port_list; /* nvme_fc_port_list */ | |
116 | struct list_head endp_list; | |
117 | struct device *dev; /* physical device for dma */ | |
118 | struct nvme_fc_port_template *ops; | |
119 | struct kref ref; | |
158bfb88 | 120 | atomic_t act_rport_cnt; |
e399441d JS |
121 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ |
122 | ||
123 | struct nvme_fc_rport { | |
124 | struct nvme_fc_remote_port remoteport; | |
125 | ||
126 | struct list_head endp_list; /* for lport->endp_list */ | |
127 | struct list_head ctrl_list; | |
c913a8b0 JS |
128 | struct list_head ls_req_list; |
129 | struct device *dev; /* physical device for dma */ | |
130 | struct nvme_fc_lport *lport; | |
e399441d JS |
131 | spinlock_t lock; |
132 | struct kref ref; | |
158bfb88 | 133 | atomic_t act_ctrl_cnt; |
2b632970 | 134 | unsigned long dev_loss_end; |
e399441d JS |
135 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ |
136 | ||
61bff8ef JS |
137 | enum nvme_fcctrl_flags { |
138 | FCCTRL_TERMIO = (1 << 0), | |
e399441d JS |
139 | }; |
140 | ||
141 | struct nvme_fc_ctrl { | |
142 | spinlock_t lock; | |
143 | struct nvme_fc_queue *queues; | |
e399441d JS |
144 | struct device *dev; |
145 | struct nvme_fc_lport *lport; | |
146 | struct nvme_fc_rport *rport; | |
147 | u32 cnum; | |
148 | ||
158bfb88 | 149 | bool assoc_active; |
e399441d JS |
150 | u64 association_id; |
151 | ||
e399441d | 152 | struct list_head ctrl_list; /* rport->ctrl_list */ |
e399441d JS |
153 | |
154 | struct blk_mq_tag_set admin_tag_set; | |
155 | struct blk_mq_tag_set tag_set; | |
156 | ||
61bff8ef | 157 | struct delayed_work connect_work; |
61bff8ef | 158 | |
e399441d | 159 | struct kref ref; |
61bff8ef JS |
160 | u32 flags; |
161 | u32 iocnt; | |
36715cf4 | 162 | wait_queue_head_t ioabort_wait; |
e399441d | 163 | |
38dabe21 | 164 | struct nvme_fc_fcp_op aen_ops[NVME_NR_AEN_COMMANDS]; |
e399441d JS |
165 | |
166 | struct nvme_ctrl ctrl; | |
167 | }; | |
168 | ||
169 | static inline struct nvme_fc_ctrl * | |
170 | to_fc_ctrl(struct nvme_ctrl *ctrl) | |
171 | { | |
172 | return container_of(ctrl, struct nvme_fc_ctrl, ctrl); | |
173 | } | |
174 | ||
175 | static inline struct nvme_fc_lport * | |
176 | localport_to_lport(struct nvme_fc_local_port *portptr) | |
177 | { | |
178 | return container_of(portptr, struct nvme_fc_lport, localport); | |
179 | } | |
180 | ||
181 | static inline struct nvme_fc_rport * | |
182 | remoteport_to_rport(struct nvme_fc_remote_port *portptr) | |
183 | { | |
184 | return container_of(portptr, struct nvme_fc_rport, remoteport); | |
185 | } | |
186 | ||
187 | static inline struct nvmefc_ls_req_op * | |
188 | ls_req_to_lsop(struct nvmefc_ls_req *lsreq) | |
189 | { | |
190 | return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); | |
191 | } | |
192 | ||
193 | static inline struct nvme_fc_fcp_op * | |
194 | fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) | |
195 | { | |
196 | return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); | |
197 | } | |
198 | ||
199 | ||
200 | ||
201 | /* *************************** Globals **************************** */ | |
202 | ||
203 | ||
204 | static DEFINE_SPINLOCK(nvme_fc_lock); | |
205 | ||
206 | static LIST_HEAD(nvme_fc_lport_list); | |
207 | static DEFINE_IDA(nvme_fc_local_port_cnt); | |
208 | static DEFINE_IDA(nvme_fc_ctrl_cnt); | |
209 | ||
e399441d JS |
210 | |
211 | ||
5f568556 JS |
212 | /* |
213 | * These items are short-term. They will eventually be moved into | |
214 | * a generic FC class. See comments in module init. | |
215 | */ | |
216 | static struct class *fc_class; | |
217 | static struct device *fc_udev_device; | |
218 | ||
e399441d JS |
219 | |
220 | /* *********************** FC-NVME Port Management ************************ */ | |
221 | ||
e399441d JS |
222 | static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, |
223 | struct nvme_fc_queue *, unsigned int); | |
224 | ||
5533d424 JS |
225 | static void |
226 | nvme_fc_free_lport(struct kref *ref) | |
227 | { | |
228 | struct nvme_fc_lport *lport = | |
229 | container_of(ref, struct nvme_fc_lport, ref); | |
230 | unsigned long flags; | |
231 | ||
232 | WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); | |
233 | WARN_ON(!list_empty(&lport->endp_list)); | |
234 | ||
235 | /* remove from transport list */ | |
236 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
237 | list_del(&lport->port_list); | |
238 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
239 | ||
5533d424 JS |
240 | ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); |
241 | ida_destroy(&lport->endp_cnt); | |
242 | ||
243 | put_device(lport->dev); | |
244 | ||
245 | kfree(lport); | |
246 | } | |
247 | ||
248 | static void | |
249 | nvme_fc_lport_put(struct nvme_fc_lport *lport) | |
250 | { | |
251 | kref_put(&lport->ref, nvme_fc_free_lport); | |
252 | } | |
253 | ||
254 | static int | |
255 | nvme_fc_lport_get(struct nvme_fc_lport *lport) | |
256 | { | |
257 | return kref_get_unless_zero(&lport->ref); | |
258 | } | |
259 | ||
260 | ||
261 | static struct nvme_fc_lport * | |
c5760f30 JS |
262 | nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo, |
263 | struct nvme_fc_port_template *ops, | |
264 | struct device *dev) | |
5533d424 JS |
265 | { |
266 | struct nvme_fc_lport *lport; | |
267 | unsigned long flags; | |
268 | ||
269 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
270 | ||
271 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
272 | if (lport->localport.node_name != pinfo->node_name || | |
273 | lport->localport.port_name != pinfo->port_name) | |
274 | continue; | |
275 | ||
c5760f30 JS |
276 | if (lport->dev != dev) { |
277 | lport = ERR_PTR(-EXDEV); | |
278 | goto out_done; | |
279 | } | |
280 | ||
5533d424 JS |
281 | if (lport->localport.port_state != FC_OBJSTATE_DELETED) { |
282 | lport = ERR_PTR(-EEXIST); | |
283 | goto out_done; | |
284 | } | |
285 | ||
286 | if (!nvme_fc_lport_get(lport)) { | |
287 | /* | |
288 | * fails if ref cnt already 0. If so, | |
289 | * act as if lport already deleted | |
290 | */ | |
291 | lport = NULL; | |
292 | goto out_done; | |
293 | } | |
294 | ||
295 | /* resume the lport */ | |
296 | ||
c5760f30 | 297 | lport->ops = ops; |
5533d424 JS |
298 | lport->localport.port_role = pinfo->port_role; |
299 | lport->localport.port_id = pinfo->port_id; | |
300 | lport->localport.port_state = FC_OBJSTATE_ONLINE; | |
301 | ||
302 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
303 | ||
304 | return lport; | |
305 | } | |
306 | ||
307 | lport = NULL; | |
308 | ||
309 | out_done: | |
310 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
311 | ||
312 | return lport; | |
313 | } | |
e399441d JS |
314 | |
315 | /** | |
316 | * nvme_fc_register_localport - transport entry point called by an | |
317 | * LLDD to register the existence of a NVME | |
318 | * host FC port. | |
319 | * @pinfo: pointer to information about the port to be registered | |
320 | * @template: LLDD entrypoints and operational parameters for the port | |
321 | * @dev: physical hardware device node port corresponds to. Will be | |
322 | * used for DMA mappings | |
323 | * @lport_p: pointer to a local port pointer. Upon success, the routine | |
324 | * will allocate a nvme_fc_local_port structure and place its | |
325 | * address in the local port pointer. Upon failure, local port | |
326 | * pointer will be set to 0. | |
327 | * | |
328 | * Returns: | |
329 | * a completion status. Must be 0 upon success; a negative errno | |
330 | * (ex: -ENXIO) upon failure. | |
331 | */ | |
332 | int | |
333 | nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, | |
334 | struct nvme_fc_port_template *template, | |
335 | struct device *dev, | |
336 | struct nvme_fc_local_port **portptr) | |
337 | { | |
338 | struct nvme_fc_lport *newrec; | |
339 | unsigned long flags; | |
340 | int ret, idx; | |
341 | ||
342 | if (!template->localport_delete || !template->remoteport_delete || | |
343 | !template->ls_req || !template->fcp_io || | |
344 | !template->ls_abort || !template->fcp_abort || | |
345 | !template->max_hw_queues || !template->max_sgl_segments || | |
346 | !template->max_dif_sgl_segments || !template->dma_boundary) { | |
347 | ret = -EINVAL; | |
348 | goto out_reghost_failed; | |
349 | } | |
350 | ||
5533d424 JS |
351 | /* |
352 | * look to see if there is already a localport that had been | |
353 | * deregistered and in the process of waiting for all the | |
354 | * references to fully be removed. If the references haven't | |
355 | * expired, we can simply re-enable the localport. Remoteports | |
356 | * and controller reconnections should resume naturally. | |
357 | */ | |
c5760f30 | 358 | newrec = nvme_fc_attach_to_unreg_lport(pinfo, template, dev); |
5533d424 JS |
359 | |
360 | /* found an lport, but something about its state is bad */ | |
361 | if (IS_ERR(newrec)) { | |
362 | ret = PTR_ERR(newrec); | |
363 | goto out_reghost_failed; | |
364 | ||
365 | /* found existing lport, which was resumed */ | |
366 | } else if (newrec) { | |
367 | *portptr = &newrec->localport; | |
368 | return 0; | |
369 | } | |
370 | ||
371 | /* nothing found - allocate a new localport struct */ | |
372 | ||
e399441d JS |
373 | newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), |
374 | GFP_KERNEL); | |
375 | if (!newrec) { | |
376 | ret = -ENOMEM; | |
377 | goto out_reghost_failed; | |
378 | } | |
379 | ||
380 | idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); | |
381 | if (idx < 0) { | |
382 | ret = -ENOSPC; | |
383 | goto out_fail_kfree; | |
384 | } | |
385 | ||
386 | if (!get_device(dev) && dev) { | |
387 | ret = -ENODEV; | |
388 | goto out_ida_put; | |
389 | } | |
390 | ||
391 | INIT_LIST_HEAD(&newrec->port_list); | |
392 | INIT_LIST_HEAD(&newrec->endp_list); | |
393 | kref_init(&newrec->ref); | |
158bfb88 | 394 | atomic_set(&newrec->act_rport_cnt, 0); |
e399441d JS |
395 | newrec->ops = template; |
396 | newrec->dev = dev; | |
397 | ida_init(&newrec->endp_cnt); | |
398 | newrec->localport.private = &newrec[1]; | |
399 | newrec->localport.node_name = pinfo->node_name; | |
400 | newrec->localport.port_name = pinfo->port_name; | |
401 | newrec->localport.port_role = pinfo->port_role; | |
402 | newrec->localport.port_id = pinfo->port_id; | |
403 | newrec->localport.port_state = FC_OBJSTATE_ONLINE; | |
404 | newrec->localport.port_num = idx; | |
405 | ||
406 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
407 | list_add_tail(&newrec->port_list, &nvme_fc_lport_list); | |
408 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
409 | ||
410 | if (dev) | |
411 | dma_set_seg_boundary(dev, template->dma_boundary); | |
412 | ||
413 | *portptr = &newrec->localport; | |
414 | return 0; | |
415 | ||
416 | out_ida_put: | |
417 | ida_simple_remove(&nvme_fc_local_port_cnt, idx); | |
418 | out_fail_kfree: | |
419 | kfree(newrec); | |
420 | out_reghost_failed: | |
421 | *portptr = NULL; | |
422 | ||
423 | return ret; | |
424 | } | |
425 | EXPORT_SYMBOL_GPL(nvme_fc_register_localport); | |
426 | ||
e399441d JS |
427 | /** |
428 | * nvme_fc_unregister_localport - transport entry point called by an | |
429 | * LLDD to deregister/remove a previously | |
430 | * registered a NVME host FC port. | |
431 | * @localport: pointer to the (registered) local port that is to be | |
432 | * deregistered. | |
433 | * | |
434 | * Returns: | |
435 | * a completion status. Must be 0 upon success; a negative errno | |
436 | * (ex: -ENXIO) upon failure. | |
437 | */ | |
438 | int | |
439 | nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) | |
440 | { | |
441 | struct nvme_fc_lport *lport = localport_to_lport(portptr); | |
442 | unsigned long flags; | |
443 | ||
444 | if (!portptr) | |
445 | return -EINVAL; | |
446 | ||
447 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
448 | ||
449 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
450 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
451 | return -EINVAL; | |
452 | } | |
453 | portptr->port_state = FC_OBJSTATE_DELETED; | |
454 | ||
455 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
456 | ||
158bfb88 JS |
457 | if (atomic_read(&lport->act_rport_cnt) == 0) |
458 | lport->ops->localport_delete(&lport->localport); | |
459 | ||
e399441d JS |
460 | nvme_fc_lport_put(lport); |
461 | ||
462 | return 0; | |
463 | } | |
464 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); | |
465 | ||
eaefd5ab JS |
466 | /* |
467 | * TRADDR strings, per FC-NVME are fixed format: | |
468 | * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters | |
469 | * udev event will only differ by prefix of what field is | |
470 | * being specified: | |
471 | * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters | |
472 | * 19 + 43 + null_fudge = 64 characters | |
473 | */ | |
474 | #define FCNVME_TRADDR_LENGTH 64 | |
475 | ||
476 | static void | |
477 | nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, | |
478 | struct nvme_fc_rport *rport) | |
479 | { | |
480 | char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ | |
481 | char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ | |
482 | char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; | |
483 | ||
484 | if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) | |
485 | return; | |
486 | ||
487 | snprintf(hostaddr, sizeof(hostaddr), | |
488 | "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
489 | lport->localport.node_name, lport->localport.port_name); | |
490 | snprintf(tgtaddr, sizeof(tgtaddr), | |
491 | "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
492 | rport->remoteport.node_name, rport->remoteport.port_name); | |
493 | kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); | |
494 | } | |
495 | ||
469d0ef0 JS |
496 | static void |
497 | nvme_fc_free_rport(struct kref *ref) | |
498 | { | |
499 | struct nvme_fc_rport *rport = | |
500 | container_of(ref, struct nvme_fc_rport, ref); | |
501 | struct nvme_fc_lport *lport = | |
502 | localport_to_lport(rport->remoteport.localport); | |
503 | unsigned long flags; | |
504 | ||
505 | WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); | |
506 | WARN_ON(!list_empty(&rport->ctrl_list)); | |
507 | ||
508 | /* remove from lport list */ | |
509 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
510 | list_del(&rport->endp_list); | |
511 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
512 | ||
469d0ef0 JS |
513 | ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); |
514 | ||
515 | kfree(rport); | |
516 | ||
517 | nvme_fc_lport_put(lport); | |
518 | } | |
519 | ||
520 | static void | |
521 | nvme_fc_rport_put(struct nvme_fc_rport *rport) | |
522 | { | |
523 | kref_put(&rport->ref, nvme_fc_free_rport); | |
524 | } | |
525 | ||
526 | static int | |
527 | nvme_fc_rport_get(struct nvme_fc_rport *rport) | |
528 | { | |
529 | return kref_get_unless_zero(&rport->ref); | |
530 | } | |
531 | ||
2b632970 JS |
532 | static void |
533 | nvme_fc_resume_controller(struct nvme_fc_ctrl *ctrl) | |
534 | { | |
535 | switch (ctrl->ctrl.state) { | |
536 | case NVME_CTRL_NEW: | |
537 | case NVME_CTRL_RECONNECTING: | |
538 | /* | |
539 | * As all reconnects were suppressed, schedule a | |
540 | * connect. | |
541 | */ | |
542 | dev_info(ctrl->ctrl.device, | |
543 | "NVME-FC{%d}: connectivity re-established. " | |
544 | "Attempting reconnect\n", ctrl->cnum); | |
545 | ||
546 | queue_delayed_work(nvme_wq, &ctrl->connect_work, 0); | |
547 | break; | |
548 | ||
549 | case NVME_CTRL_RESETTING: | |
550 | /* | |
551 | * Controller is already in the process of terminating the | |
552 | * association. No need to do anything further. The reconnect | |
553 | * step will naturally occur after the reset completes. | |
554 | */ | |
555 | break; | |
556 | ||
557 | default: | |
558 | /* no action to take - let it delete */ | |
559 | break; | |
560 | } | |
561 | } | |
562 | ||
563 | static struct nvme_fc_rport * | |
564 | nvme_fc_attach_to_suspended_rport(struct nvme_fc_lport *lport, | |
565 | struct nvme_fc_port_info *pinfo) | |
566 | { | |
567 | struct nvme_fc_rport *rport; | |
568 | struct nvme_fc_ctrl *ctrl; | |
569 | unsigned long flags; | |
570 | ||
571 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
572 | ||
573 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
574 | if (rport->remoteport.node_name != pinfo->node_name || | |
575 | rport->remoteport.port_name != pinfo->port_name) | |
576 | continue; | |
577 | ||
578 | if (!nvme_fc_rport_get(rport)) { | |
579 | rport = ERR_PTR(-ENOLCK); | |
580 | goto out_done; | |
581 | } | |
582 | ||
583 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
584 | ||
585 | spin_lock_irqsave(&rport->lock, flags); | |
586 | ||
587 | /* has it been unregistered */ | |
588 | if (rport->remoteport.port_state != FC_OBJSTATE_DELETED) { | |
589 | /* means lldd called us twice */ | |
590 | spin_unlock_irqrestore(&rport->lock, flags); | |
591 | nvme_fc_rport_put(rport); | |
592 | return ERR_PTR(-ESTALE); | |
593 | } | |
594 | ||
595 | rport->remoteport.port_state = FC_OBJSTATE_ONLINE; | |
596 | rport->dev_loss_end = 0; | |
597 | ||
598 | /* | |
599 | * kick off a reconnect attempt on all associations to the | |
600 | * remote port. A successful reconnects will resume i/o. | |
601 | */ | |
602 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) | |
603 | nvme_fc_resume_controller(ctrl); | |
604 | ||
605 | spin_unlock_irqrestore(&rport->lock, flags); | |
606 | ||
607 | return rport; | |
608 | } | |
609 | ||
610 | rport = NULL; | |
611 | ||
612 | out_done: | |
613 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
614 | ||
615 | return rport; | |
616 | } | |
617 | ||
618 | static inline void | |
619 | __nvme_fc_set_dev_loss_tmo(struct nvme_fc_rport *rport, | |
620 | struct nvme_fc_port_info *pinfo) | |
621 | { | |
622 | if (pinfo->dev_loss_tmo) | |
623 | rport->remoteport.dev_loss_tmo = pinfo->dev_loss_tmo; | |
624 | else | |
625 | rport->remoteport.dev_loss_tmo = NVME_FC_DEFAULT_DEV_LOSS_TMO; | |
626 | } | |
627 | ||
e399441d JS |
628 | /** |
629 | * nvme_fc_register_remoteport - transport entry point called by an | |
630 | * LLDD to register the existence of a NVME | |
631 | * subsystem FC port on its fabric. | |
632 | * @localport: pointer to the (registered) local port that the remote | |
633 | * subsystem port is connected to. | |
634 | * @pinfo: pointer to information about the port to be registered | |
635 | * @rport_p: pointer to a remote port pointer. Upon success, the routine | |
636 | * will allocate a nvme_fc_remote_port structure and place its | |
637 | * address in the remote port pointer. Upon failure, remote port | |
638 | * pointer will be set to 0. | |
639 | * | |
640 | * Returns: | |
641 | * a completion status. Must be 0 upon success; a negative errno | |
642 | * (ex: -ENXIO) upon failure. | |
643 | */ | |
644 | int | |
645 | nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, | |
646 | struct nvme_fc_port_info *pinfo, | |
647 | struct nvme_fc_remote_port **portptr) | |
648 | { | |
649 | struct nvme_fc_lport *lport = localport_to_lport(localport); | |
650 | struct nvme_fc_rport *newrec; | |
651 | unsigned long flags; | |
652 | int ret, idx; | |
653 | ||
2b632970 JS |
654 | if (!nvme_fc_lport_get(lport)) { |
655 | ret = -ESHUTDOWN; | |
656 | goto out_reghost_failed; | |
657 | } | |
658 | ||
659 | /* | |
660 | * look to see if there is already a remoteport that is waiting | |
661 | * for a reconnect (within dev_loss_tmo) with the same WWN's. | |
662 | * If so, transition to it and reconnect. | |
663 | */ | |
664 | newrec = nvme_fc_attach_to_suspended_rport(lport, pinfo); | |
665 | ||
666 | /* found an rport, but something about its state is bad */ | |
667 | if (IS_ERR(newrec)) { | |
668 | ret = PTR_ERR(newrec); | |
669 | goto out_lport_put; | |
670 | ||
671 | /* found existing rport, which was resumed */ | |
672 | } else if (newrec) { | |
673 | nvme_fc_lport_put(lport); | |
674 | __nvme_fc_set_dev_loss_tmo(newrec, pinfo); | |
675 | nvme_fc_signal_discovery_scan(lport, newrec); | |
676 | *portptr = &newrec->remoteport; | |
677 | return 0; | |
678 | } | |
679 | ||
680 | /* nothing found - allocate a new remoteport struct */ | |
681 | ||
e399441d JS |
682 | newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), |
683 | GFP_KERNEL); | |
684 | if (!newrec) { | |
685 | ret = -ENOMEM; | |
2b632970 | 686 | goto out_lport_put; |
e399441d JS |
687 | } |
688 | ||
689 | idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); | |
690 | if (idx < 0) { | |
691 | ret = -ENOSPC; | |
2b632970 | 692 | goto out_kfree_rport; |
e399441d JS |
693 | } |
694 | ||
695 | INIT_LIST_HEAD(&newrec->endp_list); | |
696 | INIT_LIST_HEAD(&newrec->ctrl_list); | |
c913a8b0 | 697 | INIT_LIST_HEAD(&newrec->ls_req_list); |
e399441d | 698 | kref_init(&newrec->ref); |
158bfb88 | 699 | atomic_set(&newrec->act_ctrl_cnt, 0); |
e399441d JS |
700 | spin_lock_init(&newrec->lock); |
701 | newrec->remoteport.localport = &lport->localport; | |
c913a8b0 JS |
702 | newrec->dev = lport->dev; |
703 | newrec->lport = lport; | |
e399441d JS |
704 | newrec->remoteport.private = &newrec[1]; |
705 | newrec->remoteport.port_role = pinfo->port_role; | |
706 | newrec->remoteport.node_name = pinfo->node_name; | |
707 | newrec->remoteport.port_name = pinfo->port_name; | |
708 | newrec->remoteport.port_id = pinfo->port_id; | |
709 | newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; | |
710 | newrec->remoteport.port_num = idx; | |
2b632970 | 711 | __nvme_fc_set_dev_loss_tmo(newrec, pinfo); |
e399441d JS |
712 | |
713 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
714 | list_add_tail(&newrec->endp_list, &lport->endp_list); | |
715 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
716 | ||
eaefd5ab JS |
717 | nvme_fc_signal_discovery_scan(lport, newrec); |
718 | ||
e399441d JS |
719 | *portptr = &newrec->remoteport; |
720 | return 0; | |
721 | ||
e399441d JS |
722 | out_kfree_rport: |
723 | kfree(newrec); | |
2b632970 JS |
724 | out_lport_put: |
725 | nvme_fc_lport_put(lport); | |
e399441d JS |
726 | out_reghost_failed: |
727 | *portptr = NULL; | |
728 | return ret; | |
e399441d JS |
729 | } |
730 | EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); | |
731 | ||
8d64daf7 JS |
732 | static int |
733 | nvme_fc_abort_lsops(struct nvme_fc_rport *rport) | |
734 | { | |
735 | struct nvmefc_ls_req_op *lsop; | |
736 | unsigned long flags; | |
737 | ||
738 | restart: | |
739 | spin_lock_irqsave(&rport->lock, flags); | |
740 | ||
741 | list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { | |
742 | if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { | |
743 | lsop->flags |= FCOP_FLAGS_TERMIO; | |
744 | spin_unlock_irqrestore(&rport->lock, flags); | |
745 | rport->lport->ops->ls_abort(&rport->lport->localport, | |
746 | &rport->remoteport, | |
747 | &lsop->ls_req); | |
748 | goto restart; | |
749 | } | |
750 | } | |
751 | spin_unlock_irqrestore(&rport->lock, flags); | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
2b632970 JS |
756 | static void |
757 | nvme_fc_ctrl_connectivity_loss(struct nvme_fc_ctrl *ctrl) | |
758 | { | |
759 | dev_info(ctrl->ctrl.device, | |
760 | "NVME-FC{%d}: controller connectivity lost. Awaiting " | |
761 | "Reconnect", ctrl->cnum); | |
762 | ||
763 | switch (ctrl->ctrl.state) { | |
764 | case NVME_CTRL_NEW: | |
765 | case NVME_CTRL_LIVE: | |
766 | /* | |
767 | * Schedule a controller reset. The reset will terminate the | |
768 | * association and schedule the reconnect timer. Reconnects | |
769 | * will be attempted until either the ctlr_loss_tmo | |
770 | * (max_retries * connect_delay) expires or the remoteport's | |
771 | * dev_loss_tmo expires. | |
772 | */ | |
773 | if (nvme_reset_ctrl(&ctrl->ctrl)) { | |
774 | dev_warn(ctrl->ctrl.device, | |
775 | "NVME-FC{%d}: Couldn't schedule reset. " | |
776 | "Deleting controller.\n", | |
777 | ctrl->cnum); | |
778 | nvme_delete_ctrl(&ctrl->ctrl); | |
779 | } | |
780 | break; | |
781 | ||
782 | case NVME_CTRL_RECONNECTING: | |
783 | /* | |
784 | * The association has already been terminated and the | |
785 | * controller is attempting reconnects. No need to do anything | |
786 | * futher. Reconnects will be attempted until either the | |
787 | * ctlr_loss_tmo (max_retries * connect_delay) expires or the | |
788 | * remoteport's dev_loss_tmo expires. | |
789 | */ | |
790 | break; | |
791 | ||
792 | case NVME_CTRL_RESETTING: | |
793 | /* | |
794 | * Controller is already in the process of terminating the | |
795 | * association. No need to do anything further. The reconnect | |
796 | * step will kick in naturally after the association is | |
797 | * terminated. | |
798 | */ | |
799 | break; | |
800 | ||
801 | case NVME_CTRL_DELETING: | |
802 | default: | |
803 | /* no action to take - let it delete */ | |
804 | break; | |
805 | } | |
806 | } | |
807 | ||
e399441d JS |
808 | /** |
809 | * nvme_fc_unregister_remoteport - transport entry point called by an | |
810 | * LLDD to deregister/remove a previously | |
811 | * registered a NVME subsystem FC port. | |
812 | * @remoteport: pointer to the (registered) remote port that is to be | |
813 | * deregistered. | |
814 | * | |
815 | * Returns: | |
816 | * a completion status. Must be 0 upon success; a negative errno | |
817 | * (ex: -ENXIO) upon failure. | |
818 | */ | |
819 | int | |
820 | nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) | |
821 | { | |
822 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
823 | struct nvme_fc_ctrl *ctrl; | |
824 | unsigned long flags; | |
825 | ||
826 | if (!portptr) | |
827 | return -EINVAL; | |
828 | ||
829 | spin_lock_irqsave(&rport->lock, flags); | |
830 | ||
831 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
832 | spin_unlock_irqrestore(&rport->lock, flags); | |
833 | return -EINVAL; | |
834 | } | |
835 | portptr->port_state = FC_OBJSTATE_DELETED; | |
836 | ||
2b632970 JS |
837 | rport->dev_loss_end = jiffies + (portptr->dev_loss_tmo * HZ); |
838 | ||
839 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { | |
840 | /* if dev_loss_tmo==0, dev loss is immediate */ | |
841 | if (!portptr->dev_loss_tmo) { | |
842 | dev_warn(ctrl->ctrl.device, | |
843 | "NVME-FC{%d}: controller connectivity lost. " | |
844 | "Deleting controller.\n", | |
845 | ctrl->cnum); | |
846 | nvme_delete_ctrl(&ctrl->ctrl); | |
847 | } else | |
848 | nvme_fc_ctrl_connectivity_loss(ctrl); | |
849 | } | |
e399441d JS |
850 | |
851 | spin_unlock_irqrestore(&rport->lock, flags); | |
852 | ||
8d64daf7 JS |
853 | nvme_fc_abort_lsops(rport); |
854 | ||
158bfb88 JS |
855 | if (atomic_read(&rport->act_ctrl_cnt) == 0) |
856 | rport->lport->ops->remoteport_delete(portptr); | |
857 | ||
2b632970 JS |
858 | /* |
859 | * release the reference, which will allow, if all controllers | |
860 | * go away, which should only occur after dev_loss_tmo occurs, | |
861 | * for the rport to be torn down. | |
862 | */ | |
e399441d | 863 | nvme_fc_rport_put(rport); |
2b632970 | 864 | |
e399441d JS |
865 | return 0; |
866 | } | |
867 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); | |
868 | ||
eaefd5ab JS |
869 | /** |
870 | * nvme_fc_rescan_remoteport - transport entry point called by an | |
871 | * LLDD to request a nvme device rescan. | |
872 | * @remoteport: pointer to the (registered) remote port that is to be | |
873 | * rescanned. | |
874 | * | |
875 | * Returns: N/A | |
876 | */ | |
877 | void | |
878 | nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) | |
879 | { | |
880 | struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); | |
881 | ||
882 | nvme_fc_signal_discovery_scan(rport->lport, rport); | |
883 | } | |
884 | EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); | |
885 | ||
ac7fe82b JS |
886 | int |
887 | nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *portptr, | |
888 | u32 dev_loss_tmo) | |
889 | { | |
890 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
ac7fe82b JS |
891 | unsigned long flags; |
892 | ||
893 | spin_lock_irqsave(&rport->lock, flags); | |
894 | ||
895 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
896 | spin_unlock_irqrestore(&rport->lock, flags); | |
897 | return -EINVAL; | |
898 | } | |
899 | ||
900 | /* a dev_loss_tmo of 0 (immediate) is allowed to be set */ | |
901 | rport->remoteport.dev_loss_tmo = dev_loss_tmo; | |
902 | ||
903 | spin_unlock_irqrestore(&rport->lock, flags); | |
904 | ||
905 | return 0; | |
906 | } | |
907 | EXPORT_SYMBOL_GPL(nvme_fc_set_remoteport_devloss); | |
908 | ||
e399441d JS |
909 | |
910 | /* *********************** FC-NVME DMA Handling **************************** */ | |
911 | ||
912 | /* | |
913 | * The fcloop device passes in a NULL device pointer. Real LLD's will | |
914 | * pass in a valid device pointer. If NULL is passed to the dma mapping | |
915 | * routines, depending on the platform, it may or may not succeed, and | |
916 | * may crash. | |
917 | * | |
918 | * As such: | |
919 | * Wrapper all the dma routines and check the dev pointer. | |
920 | * | |
921 | * If simple mappings (return just a dma address, we'll noop them, | |
922 | * returning a dma address of 0. | |
923 | * | |
924 | * On more complex mappings (dma_map_sg), a pseudo routine fills | |
925 | * in the scatter list, setting all dma addresses to 0. | |
926 | */ | |
927 | ||
928 | static inline dma_addr_t | |
929 | fc_dma_map_single(struct device *dev, void *ptr, size_t size, | |
930 | enum dma_data_direction dir) | |
931 | { | |
932 | return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; | |
933 | } | |
934 | ||
935 | static inline int | |
936 | fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
937 | { | |
938 | return dev ? dma_mapping_error(dev, dma_addr) : 0; | |
939 | } | |
940 | ||
941 | static inline void | |
942 | fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
943 | enum dma_data_direction dir) | |
944 | { | |
945 | if (dev) | |
946 | dma_unmap_single(dev, addr, size, dir); | |
947 | } | |
948 | ||
949 | static inline void | |
950 | fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, | |
951 | enum dma_data_direction dir) | |
952 | { | |
953 | if (dev) | |
954 | dma_sync_single_for_cpu(dev, addr, size, dir); | |
955 | } | |
956 | ||
957 | static inline void | |
958 | fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, | |
959 | enum dma_data_direction dir) | |
960 | { | |
961 | if (dev) | |
962 | dma_sync_single_for_device(dev, addr, size, dir); | |
963 | } | |
964 | ||
965 | /* pseudo dma_map_sg call */ | |
966 | static int | |
967 | fc_map_sg(struct scatterlist *sg, int nents) | |
968 | { | |
969 | struct scatterlist *s; | |
970 | int i; | |
971 | ||
972 | WARN_ON(nents == 0 || sg[0].length == 0); | |
973 | ||
974 | for_each_sg(sg, s, nents, i) { | |
975 | s->dma_address = 0L; | |
976 | #ifdef CONFIG_NEED_SG_DMA_LENGTH | |
977 | s->dma_length = s->length; | |
978 | #endif | |
979 | } | |
980 | return nents; | |
981 | } | |
982 | ||
983 | static inline int | |
984 | fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
985 | enum dma_data_direction dir) | |
986 | { | |
987 | return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); | |
988 | } | |
989 | ||
990 | static inline void | |
991 | fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, | |
992 | enum dma_data_direction dir) | |
993 | { | |
994 | if (dev) | |
995 | dma_unmap_sg(dev, sg, nents, dir); | |
996 | } | |
997 | ||
e399441d JS |
998 | /* *********************** FC-NVME LS Handling **************************** */ |
999 | ||
1000 | static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); | |
1001 | static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); | |
1002 | ||
1003 | ||
1004 | static void | |
c913a8b0 | 1005 | __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) |
e399441d | 1006 | { |
c913a8b0 | 1007 | struct nvme_fc_rport *rport = lsop->rport; |
e399441d JS |
1008 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; |
1009 | unsigned long flags; | |
1010 | ||
c913a8b0 | 1011 | spin_lock_irqsave(&rport->lock, flags); |
e399441d JS |
1012 | |
1013 | if (!lsop->req_queued) { | |
c913a8b0 | 1014 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d JS |
1015 | return; |
1016 | } | |
1017 | ||
1018 | list_del(&lsop->lsreq_list); | |
1019 | ||
1020 | lsop->req_queued = false; | |
1021 | ||
c913a8b0 | 1022 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 1023 | |
c913a8b0 | 1024 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, |
e399441d JS |
1025 | (lsreq->rqstlen + lsreq->rsplen), |
1026 | DMA_BIDIRECTIONAL); | |
1027 | ||
c913a8b0 | 1028 | nvme_fc_rport_put(rport); |
e399441d JS |
1029 | } |
1030 | ||
1031 | static int | |
c913a8b0 | 1032 | __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, |
e399441d JS |
1033 | struct nvmefc_ls_req_op *lsop, |
1034 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
1035 | { | |
1036 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
1037 | unsigned long flags; | |
c913a8b0 | 1038 | int ret = 0; |
e399441d | 1039 | |
c913a8b0 JS |
1040 | if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
1041 | return -ECONNREFUSED; | |
1042 | ||
1043 | if (!nvme_fc_rport_get(rport)) | |
e399441d JS |
1044 | return -ESHUTDOWN; |
1045 | ||
1046 | lsreq->done = done; | |
c913a8b0 | 1047 | lsop->rport = rport; |
e399441d JS |
1048 | lsop->req_queued = false; |
1049 | INIT_LIST_HEAD(&lsop->lsreq_list); | |
1050 | init_completion(&lsop->ls_done); | |
1051 | ||
c913a8b0 | 1052 | lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, |
e399441d JS |
1053 | lsreq->rqstlen + lsreq->rsplen, |
1054 | DMA_BIDIRECTIONAL); | |
c913a8b0 JS |
1055 | if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { |
1056 | ret = -EFAULT; | |
1057 | goto out_putrport; | |
e399441d JS |
1058 | } |
1059 | lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; | |
1060 | ||
c913a8b0 | 1061 | spin_lock_irqsave(&rport->lock, flags); |
e399441d | 1062 | |
c913a8b0 | 1063 | list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); |
e399441d JS |
1064 | |
1065 | lsop->req_queued = true; | |
1066 | ||
c913a8b0 | 1067 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 1068 | |
c913a8b0 JS |
1069 | ret = rport->lport->ops->ls_req(&rport->lport->localport, |
1070 | &rport->remoteport, lsreq); | |
e399441d | 1071 | if (ret) |
c913a8b0 JS |
1072 | goto out_unlink; |
1073 | ||
1074 | return 0; | |
1075 | ||
1076 | out_unlink: | |
1077 | lsop->ls_error = ret; | |
1078 | spin_lock_irqsave(&rport->lock, flags); | |
1079 | lsop->req_queued = false; | |
1080 | list_del(&lsop->lsreq_list); | |
1081 | spin_unlock_irqrestore(&rport->lock, flags); | |
1082 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, | |
1083 | (lsreq->rqstlen + lsreq->rsplen), | |
1084 | DMA_BIDIRECTIONAL); | |
1085 | out_putrport: | |
1086 | nvme_fc_rport_put(rport); | |
e399441d JS |
1087 | |
1088 | return ret; | |
1089 | } | |
1090 | ||
1091 | static void | |
1092 | nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) | |
1093 | { | |
1094 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
1095 | ||
1096 | lsop->ls_error = status; | |
1097 | complete(&lsop->ls_done); | |
1098 | } | |
1099 | ||
1100 | static int | |
c913a8b0 | 1101 | nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) |
e399441d JS |
1102 | { |
1103 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
1104 | struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; | |
1105 | int ret; | |
1106 | ||
c913a8b0 | 1107 | ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); |
e399441d | 1108 | |
c913a8b0 | 1109 | if (!ret) { |
e399441d JS |
1110 | /* |
1111 | * No timeout/not interruptible as we need the struct | |
1112 | * to exist until the lldd calls us back. Thus mandate | |
1113 | * wait until driver calls back. lldd responsible for | |
1114 | * the timeout action | |
1115 | */ | |
1116 | wait_for_completion(&lsop->ls_done); | |
1117 | ||
c913a8b0 | 1118 | __nvme_fc_finish_ls_req(lsop); |
e399441d | 1119 | |
c913a8b0 | 1120 | ret = lsop->ls_error; |
e399441d JS |
1121 | } |
1122 | ||
c913a8b0 JS |
1123 | if (ret) |
1124 | return ret; | |
1125 | ||
e399441d JS |
1126 | /* ACC or RJT payload ? */ |
1127 | if (rjt->w0.ls_cmd == FCNVME_LS_RJT) | |
1128 | return -ENXIO; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
c913a8b0 JS |
1133 | static int |
1134 | nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, | |
e399441d JS |
1135 | struct nvmefc_ls_req_op *lsop, |
1136 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
1137 | { | |
e399441d JS |
1138 | /* don't wait for completion */ |
1139 | ||
c913a8b0 | 1140 | return __nvme_fc_send_ls_req(rport, lsop, done); |
e399441d JS |
1141 | } |
1142 | ||
1143 | /* Validation Error indexes into the string table below */ | |
1144 | enum { | |
1145 | VERR_NO_ERROR = 0, | |
1146 | VERR_LSACC = 1, | |
1147 | VERR_LSDESC_RQST = 2, | |
1148 | VERR_LSDESC_RQST_LEN = 3, | |
1149 | VERR_ASSOC_ID = 4, | |
1150 | VERR_ASSOC_ID_LEN = 5, | |
1151 | VERR_CONN_ID = 6, | |
1152 | VERR_CONN_ID_LEN = 7, | |
1153 | VERR_CR_ASSOC = 8, | |
1154 | VERR_CR_ASSOC_ACC_LEN = 9, | |
1155 | VERR_CR_CONN = 10, | |
1156 | VERR_CR_CONN_ACC_LEN = 11, | |
1157 | VERR_DISCONN = 12, | |
1158 | VERR_DISCONN_ACC_LEN = 13, | |
1159 | }; | |
1160 | ||
1161 | static char *validation_errors[] = { | |
1162 | "OK", | |
1163 | "Not LS_ACC", | |
1164 | "Not LSDESC_RQST", | |
1165 | "Bad LSDESC_RQST Length", | |
1166 | "Not Association ID", | |
1167 | "Bad Association ID Length", | |
1168 | "Not Connection ID", | |
1169 | "Bad Connection ID Length", | |
1170 | "Not CR_ASSOC Rqst", | |
1171 | "Bad CR_ASSOC ACC Length", | |
1172 | "Not CR_CONN Rqst", | |
1173 | "Bad CR_CONN ACC Length", | |
1174 | "Not Disconnect Rqst", | |
1175 | "Bad Disconnect ACC Length", | |
1176 | }; | |
1177 | ||
1178 | static int | |
1179 | nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, | |
1180 | struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) | |
1181 | { | |
1182 | struct nvmefc_ls_req_op *lsop; | |
1183 | struct nvmefc_ls_req *lsreq; | |
1184 | struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; | |
1185 | struct fcnvme_ls_cr_assoc_acc *assoc_acc; | |
1186 | int ret, fcret = 0; | |
1187 | ||
1188 | lsop = kzalloc((sizeof(*lsop) + | |
1189 | ctrl->lport->ops->lsrqst_priv_sz + | |
1190 | sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); | |
1191 | if (!lsop) { | |
1192 | ret = -ENOMEM; | |
1193 | goto out_no_memory; | |
1194 | } | |
1195 | lsreq = &lsop->ls_req; | |
1196 | ||
1197 | lsreq->private = (void *)&lsop[1]; | |
1198 | assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) | |
1199 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1200 | assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; | |
1201 | ||
1202 | assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; | |
1203 | assoc_rqst->desc_list_len = | |
1204 | cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
1205 | ||
1206 | assoc_rqst->assoc_cmd.desc_tag = | |
1207 | cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); | |
1208 | assoc_rqst->assoc_cmd.desc_len = | |
1209 | fcnvme_lsdesc_len( | |
1210 | sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
1211 | ||
1212 | assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
1213 | assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); | |
1214 | /* Linux supports only Dynamic controllers */ | |
1215 | assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); | |
8e412263 | 1216 | uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); |
e399441d JS |
1217 | strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, |
1218 | min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); | |
1219 | strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, | |
1220 | min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); | |
1221 | ||
1222 | lsop->queue = queue; | |
1223 | lsreq->rqstaddr = assoc_rqst; | |
1224 | lsreq->rqstlen = sizeof(*assoc_rqst); | |
1225 | lsreq->rspaddr = assoc_acc; | |
1226 | lsreq->rsplen = sizeof(*assoc_acc); | |
1227 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1228 | ||
c913a8b0 | 1229 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1230 | if (ret) |
1231 | goto out_free_buffer; | |
1232 | ||
1233 | /* process connect LS completion */ | |
1234 | ||
1235 | /* validate the ACC response */ | |
1236 | if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1237 | fcret = VERR_LSACC; | |
f77fc87c | 1238 | else if (assoc_acc->hdr.desc_list_len != |
e399441d JS |
1239 | fcnvme_lsdesc_len( |
1240 | sizeof(struct fcnvme_ls_cr_assoc_acc))) | |
1241 | fcret = VERR_CR_ASSOC_ACC_LEN; | |
f77fc87c JS |
1242 | else if (assoc_acc->hdr.rqst.desc_tag != |
1243 | cpu_to_be32(FCNVME_LSDESC_RQST)) | |
e399441d JS |
1244 | fcret = VERR_LSDESC_RQST; |
1245 | else if (assoc_acc->hdr.rqst.desc_len != | |
1246 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1247 | fcret = VERR_LSDESC_RQST_LEN; | |
1248 | else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) | |
1249 | fcret = VERR_CR_ASSOC; | |
1250 | else if (assoc_acc->associd.desc_tag != | |
1251 | cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) | |
1252 | fcret = VERR_ASSOC_ID; | |
1253 | else if (assoc_acc->associd.desc_len != | |
1254 | fcnvme_lsdesc_len( | |
1255 | sizeof(struct fcnvme_lsdesc_assoc_id))) | |
1256 | fcret = VERR_ASSOC_ID_LEN; | |
1257 | else if (assoc_acc->connectid.desc_tag != | |
1258 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1259 | fcret = VERR_CONN_ID; | |
1260 | else if (assoc_acc->connectid.desc_len != | |
1261 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1262 | fcret = VERR_CONN_ID_LEN; | |
1263 | ||
1264 | if (fcret) { | |
1265 | ret = -EBADF; | |
1266 | dev_err(ctrl->dev, | |
1267 | "q %d connect failed: %s\n", | |
1268 | queue->qnum, validation_errors[fcret]); | |
1269 | } else { | |
1270 | ctrl->association_id = | |
1271 | be64_to_cpu(assoc_acc->associd.association_id); | |
1272 | queue->connection_id = | |
1273 | be64_to_cpu(assoc_acc->connectid.connection_id); | |
1274 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1275 | } | |
1276 | ||
1277 | out_free_buffer: | |
1278 | kfree(lsop); | |
1279 | out_no_memory: | |
1280 | if (ret) | |
1281 | dev_err(ctrl->dev, | |
1282 | "queue %d connect admin queue failed (%d).\n", | |
1283 | queue->qnum, ret); | |
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | static int | |
1288 | nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, | |
1289 | u16 qsize, u16 ersp_ratio) | |
1290 | { | |
1291 | struct nvmefc_ls_req_op *lsop; | |
1292 | struct nvmefc_ls_req *lsreq; | |
1293 | struct fcnvme_ls_cr_conn_rqst *conn_rqst; | |
1294 | struct fcnvme_ls_cr_conn_acc *conn_acc; | |
1295 | int ret, fcret = 0; | |
1296 | ||
1297 | lsop = kzalloc((sizeof(*lsop) + | |
1298 | ctrl->lport->ops->lsrqst_priv_sz + | |
1299 | sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); | |
1300 | if (!lsop) { | |
1301 | ret = -ENOMEM; | |
1302 | goto out_no_memory; | |
1303 | } | |
1304 | lsreq = &lsop->ls_req; | |
1305 | ||
1306 | lsreq->private = (void *)&lsop[1]; | |
1307 | conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) | |
1308 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1309 | conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; | |
1310 | ||
1311 | conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; | |
1312 | conn_rqst->desc_list_len = cpu_to_be32( | |
1313 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1314 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1315 | ||
1316 | conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1317 | conn_rqst->associd.desc_len = | |
1318 | fcnvme_lsdesc_len( | |
1319 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1320 | conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1321 | conn_rqst->connect_cmd.desc_tag = | |
1322 | cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); | |
1323 | conn_rqst->connect_cmd.desc_len = | |
1324 | fcnvme_lsdesc_len( | |
1325 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1326 | conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
1327 | conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); | |
1328 | conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); | |
1329 | ||
1330 | lsop->queue = queue; | |
1331 | lsreq->rqstaddr = conn_rqst; | |
1332 | lsreq->rqstlen = sizeof(*conn_rqst); | |
1333 | lsreq->rspaddr = conn_acc; | |
1334 | lsreq->rsplen = sizeof(*conn_acc); | |
1335 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1336 | ||
c913a8b0 | 1337 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1338 | if (ret) |
1339 | goto out_free_buffer; | |
1340 | ||
1341 | /* process connect LS completion */ | |
1342 | ||
1343 | /* validate the ACC response */ | |
1344 | if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1345 | fcret = VERR_LSACC; | |
f77fc87c | 1346 | else if (conn_acc->hdr.desc_list_len != |
e399441d JS |
1347 | fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) |
1348 | fcret = VERR_CR_CONN_ACC_LEN; | |
f77fc87c | 1349 | else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) |
e399441d JS |
1350 | fcret = VERR_LSDESC_RQST; |
1351 | else if (conn_acc->hdr.rqst.desc_len != | |
1352 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1353 | fcret = VERR_LSDESC_RQST_LEN; | |
1354 | else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) | |
1355 | fcret = VERR_CR_CONN; | |
1356 | else if (conn_acc->connectid.desc_tag != | |
1357 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1358 | fcret = VERR_CONN_ID; | |
1359 | else if (conn_acc->connectid.desc_len != | |
1360 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1361 | fcret = VERR_CONN_ID_LEN; | |
1362 | ||
1363 | if (fcret) { | |
1364 | ret = -EBADF; | |
1365 | dev_err(ctrl->dev, | |
1366 | "q %d connect failed: %s\n", | |
1367 | queue->qnum, validation_errors[fcret]); | |
1368 | } else { | |
1369 | queue->connection_id = | |
1370 | be64_to_cpu(conn_acc->connectid.connection_id); | |
1371 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1372 | } | |
1373 | ||
1374 | out_free_buffer: | |
1375 | kfree(lsop); | |
1376 | out_no_memory: | |
1377 | if (ret) | |
1378 | dev_err(ctrl->dev, | |
1379 | "queue %d connect command failed (%d).\n", | |
1380 | queue->qnum, ret); | |
1381 | return ret; | |
1382 | } | |
1383 | ||
1384 | static void | |
1385 | nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) | |
1386 | { | |
1387 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
e399441d | 1388 | |
c913a8b0 | 1389 | __nvme_fc_finish_ls_req(lsop); |
e399441d JS |
1390 | |
1391 | /* fc-nvme iniator doesn't care about success or failure of cmd */ | |
1392 | ||
1393 | kfree(lsop); | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * This routine sends a FC-NVME LS to disconnect (aka terminate) | |
1398 | * the FC-NVME Association. Terminating the association also | |
1399 | * terminates the FC-NVME connections (per queue, both admin and io | |
1400 | * queues) that are part of the association. E.g. things are torn | |
1401 | * down, and the related FC-NVME Association ID and Connection IDs | |
1402 | * become invalid. | |
1403 | * | |
1404 | * The behavior of the fc-nvme initiator is such that it's | |
1405 | * understanding of the association and connections will implicitly | |
1406 | * be torn down. The action is implicit as it may be due to a loss of | |
1407 | * connectivity with the fc-nvme target, so you may never get a | |
1408 | * response even if you tried. As such, the action of this routine | |
1409 | * is to asynchronously send the LS, ignore any results of the LS, and | |
1410 | * continue on with terminating the association. If the fc-nvme target | |
1411 | * is present and receives the LS, it too can tear down. | |
1412 | */ | |
1413 | static void | |
1414 | nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) | |
1415 | { | |
1416 | struct fcnvme_ls_disconnect_rqst *discon_rqst; | |
1417 | struct fcnvme_ls_disconnect_acc *discon_acc; | |
1418 | struct nvmefc_ls_req_op *lsop; | |
1419 | struct nvmefc_ls_req *lsreq; | |
c913a8b0 | 1420 | int ret; |
e399441d JS |
1421 | |
1422 | lsop = kzalloc((sizeof(*lsop) + | |
1423 | ctrl->lport->ops->lsrqst_priv_sz + | |
1424 | sizeof(*discon_rqst) + sizeof(*discon_acc)), | |
1425 | GFP_KERNEL); | |
1426 | if (!lsop) | |
1427 | /* couldn't sent it... too bad */ | |
1428 | return; | |
1429 | ||
1430 | lsreq = &lsop->ls_req; | |
1431 | ||
1432 | lsreq->private = (void *)&lsop[1]; | |
1433 | discon_rqst = (struct fcnvme_ls_disconnect_rqst *) | |
1434 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1435 | discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; | |
1436 | ||
1437 | discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; | |
1438 | discon_rqst->desc_list_len = cpu_to_be32( | |
1439 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1440 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1441 | ||
1442 | discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1443 | discon_rqst->associd.desc_len = | |
1444 | fcnvme_lsdesc_len( | |
1445 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1446 | ||
1447 | discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1448 | ||
1449 | discon_rqst->discon_cmd.desc_tag = cpu_to_be32( | |
1450 | FCNVME_LSDESC_DISCONN_CMD); | |
1451 | discon_rqst->discon_cmd.desc_len = | |
1452 | fcnvme_lsdesc_len( | |
1453 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1454 | discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; | |
1455 | discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); | |
1456 | ||
1457 | lsreq->rqstaddr = discon_rqst; | |
1458 | lsreq->rqstlen = sizeof(*discon_rqst); | |
1459 | lsreq->rspaddr = discon_acc; | |
1460 | lsreq->rsplen = sizeof(*discon_acc); | |
1461 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1462 | ||
c913a8b0 JS |
1463 | ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, |
1464 | nvme_fc_disconnect_assoc_done); | |
1465 | if (ret) | |
1466 | kfree(lsop); | |
e399441d JS |
1467 | |
1468 | /* only meaningful part to terminating the association */ | |
1469 | ctrl->association_id = 0; | |
1470 | } | |
1471 | ||
1472 | ||
1473 | /* *********************** NVME Ctrl Routines **************************** */ | |
1474 | ||
78a7ac26 | 1475 | static void __nvme_fc_final_op_cleanup(struct request *rq); |
f874d5d0 | 1476 | static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); |
e399441d JS |
1477 | |
1478 | static int | |
1479 | nvme_fc_reinit_request(void *data, struct request *rq) | |
1480 | { | |
1481 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1482 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1483 | ||
1484 | memset(cmdiu, 0, sizeof(*cmdiu)); | |
1485 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1486 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1487 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1488 | memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); | |
1489 | ||
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static void | |
1494 | __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, | |
1495 | struct nvme_fc_fcp_op *op) | |
1496 | { | |
1497 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, | |
1498 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1499 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, | |
1500 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1501 | ||
1502 | atomic_set(&op->state, FCPOP_STATE_UNINIT); | |
1503 | } | |
1504 | ||
1505 | static void | |
d6296d39 CH |
1506 | nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
1507 | unsigned int hctx_idx) | |
e399441d JS |
1508 | { |
1509 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1510 | ||
d6296d39 | 1511 | return __nvme_fc_exit_request(set->driver_data, op); |
e399441d JS |
1512 | } |
1513 | ||
78a7ac26 JS |
1514 | static int |
1515 | __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) | |
1516 | { | |
1517 | int state; | |
1518 | ||
1519 | state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); | |
1520 | if (state != FCPOP_STATE_ACTIVE) { | |
1521 | atomic_set(&op->state, state); | |
1522 | return -ECANCELED; | |
1523 | } | |
1524 | ||
1525 | ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, | |
1526 | &ctrl->rport->remoteport, | |
1527 | op->queue->lldd_handle, | |
1528 | &op->fcp_req); | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
e399441d | 1533 | static void |
78a7ac26 | 1534 | nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
1535 | { |
1536 | struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; | |
78a7ac26 JS |
1537 | unsigned long flags; |
1538 | int i, ret; | |
e399441d | 1539 | |
38dabe21 | 1540 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { |
78a7ac26 | 1541 | if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) |
e399441d | 1542 | continue; |
78a7ac26 JS |
1543 | |
1544 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1545 | if (ctrl->flags & FCCTRL_TERMIO) { |
1546 | ctrl->iocnt++; | |
1547 | aen_op->flags |= FCOP_FLAGS_TERMIO; | |
1548 | } | |
78a7ac26 JS |
1549 | spin_unlock_irqrestore(&ctrl->lock, flags); |
1550 | ||
1551 | ret = __nvme_fc_abort_op(ctrl, aen_op); | |
1552 | if (ret) { | |
1553 | /* | |
1554 | * if __nvme_fc_abort_op failed the io wasn't | |
1555 | * active. Thus this call path is running in | |
1556 | * parallel to the io complete. Treat as non-error. | |
1557 | */ | |
1558 | ||
1559 | /* back out the flags/counters */ | |
1560 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1561 | if (ctrl->flags & FCCTRL_TERMIO) |
1562 | ctrl->iocnt--; | |
78a7ac26 JS |
1563 | aen_op->flags &= ~FCOP_FLAGS_TERMIO; |
1564 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1565 | return; | |
1566 | } | |
e399441d JS |
1567 | } |
1568 | } | |
1569 | ||
78a7ac26 JS |
1570 | static inline int |
1571 | __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, | |
1572 | struct nvme_fc_fcp_op *op) | |
1573 | { | |
1574 | unsigned long flags; | |
1575 | bool complete_rq = false; | |
1576 | ||
1577 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef | 1578 | if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { |
36715cf4 JS |
1579 | if (ctrl->flags & FCCTRL_TERMIO) { |
1580 | if (!--ctrl->iocnt) | |
1581 | wake_up(&ctrl->ioabort_wait); | |
1582 | } | |
61bff8ef | 1583 | } |
78a7ac26 JS |
1584 | if (op->flags & FCOP_FLAGS_RELEASED) |
1585 | complete_rq = true; | |
1586 | else | |
1587 | op->flags |= FCOP_FLAGS_COMPLETE; | |
1588 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1589 | ||
1590 | return complete_rq; | |
1591 | } | |
1592 | ||
baee29ac | 1593 | static void |
e399441d JS |
1594 | nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) |
1595 | { | |
1596 | struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); | |
1597 | struct request *rq = op->rq; | |
1598 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1599 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1600 | struct nvme_fc_queue *queue = op->queue; | |
1601 | struct nvme_completion *cqe = &op->rsp_iu.cqe; | |
458f280d | 1602 | struct nvme_command *sqe = &op->cmd_iu.sqe; |
d663b69f | 1603 | __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); |
27fa9bc5 | 1604 | union nvme_result result; |
0a02e39f | 1605 | bool terminate_assoc = true; |
e399441d JS |
1606 | |
1607 | /* | |
1608 | * WARNING: | |
1609 | * The current linux implementation of a nvme controller | |
1610 | * allocates a single tag set for all io queues and sizes | |
1611 | * the io queues to fully hold all possible tags. Thus, the | |
1612 | * implementation does not reference or care about the sqhd | |
1613 | * value as it never needs to use the sqhd/sqtail pointers | |
1614 | * for submission pacing. | |
1615 | * | |
1616 | * This affects the FC-NVME implementation in two ways: | |
1617 | * 1) As the value doesn't matter, we don't need to waste | |
1618 | * cycles extracting it from ERSPs and stamping it in the | |
1619 | * cases where the transport fabricates CQEs on successful | |
1620 | * completions. | |
1621 | * 2) The FC-NVME implementation requires that delivery of | |
1622 | * ERSP completions are to go back to the nvme layer in order | |
1623 | * relative to the rsn, such that the sqhd value will always | |
1624 | * be "in order" for the nvme layer. As the nvme layer in | |
1625 | * linux doesn't care about sqhd, there's no need to return | |
1626 | * them in order. | |
1627 | * | |
1628 | * Additionally: | |
1629 | * As the core nvme layer in linux currently does not look at | |
1630 | * every field in the cqe - in cases where the FC transport must | |
1631 | * fabricate a CQE, the following fields will not be set as they | |
1632 | * are not referenced: | |
1633 | * cqe.sqid, cqe.sqhd, cqe.command_id | |
f874d5d0 JS |
1634 | * |
1635 | * Failure or error of an individual i/o, in a transport | |
1636 | * detected fashion unrelated to the nvme completion status, | |
1637 | * potentially cause the initiator and target sides to get out | |
1638 | * of sync on SQ head/tail (aka outstanding io count allowed). | |
1639 | * Per FC-NVME spec, failure of an individual command requires | |
1640 | * the connection to be terminated, which in turn requires the | |
1641 | * association to be terminated. | |
e399441d JS |
1642 | */ |
1643 | ||
1644 | fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, | |
1645 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1646 | ||
0a02e39f JS |
1647 | if (atomic_read(&op->state) == FCPOP_STATE_ABORTED || |
1648 | op->flags & FCOP_FLAGS_TERMIO) | |
1649 | status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); | |
62eeacb0 | 1650 | else if (freq->status) |
56b7103a | 1651 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1652 | |
1653 | /* | |
1654 | * For the linux implementation, if we have an unsuccesful | |
1655 | * status, they blk-mq layer can typically be called with the | |
1656 | * non-zero status and the content of the cqe isn't important. | |
1657 | */ | |
1658 | if (status) | |
1659 | goto done; | |
1660 | ||
1661 | /* | |
1662 | * command completed successfully relative to the wire | |
1663 | * protocol. However, validate anything received and | |
1664 | * extract the status and result from the cqe (create it | |
1665 | * where necessary). | |
1666 | */ | |
1667 | ||
1668 | switch (freq->rcv_rsplen) { | |
1669 | ||
1670 | case 0: | |
1671 | case NVME_FC_SIZEOF_ZEROS_RSP: | |
1672 | /* | |
1673 | * No response payload or 12 bytes of payload (which | |
1674 | * should all be zeros) are considered successful and | |
1675 | * no payload in the CQE by the transport. | |
1676 | */ | |
1677 | if (freq->transferred_length != | |
1678 | be32_to_cpu(op->cmd_iu.data_len)) { | |
56b7103a | 1679 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1680 | goto done; |
1681 | } | |
27fa9bc5 | 1682 | result.u64 = 0; |
e399441d JS |
1683 | break; |
1684 | ||
1685 | case sizeof(struct nvme_fc_ersp_iu): | |
1686 | /* | |
1687 | * The ERSP IU contains a full completion with CQE. | |
1688 | * Validate ERSP IU and look at cqe. | |
1689 | */ | |
1690 | if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != | |
1691 | (freq->rcv_rsplen / 4) || | |
1692 | be32_to_cpu(op->rsp_iu.xfrd_len) != | |
1693 | freq->transferred_length || | |
726a1080 | 1694 | op->rsp_iu.status_code || |
458f280d | 1695 | sqe->common.command_id != cqe->command_id)) { |
56b7103a | 1696 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1697 | goto done; |
1698 | } | |
27fa9bc5 | 1699 | result = cqe->result; |
d663b69f | 1700 | status = cqe->status; |
e399441d JS |
1701 | break; |
1702 | ||
1703 | default: | |
56b7103a | 1704 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1705 | goto done; |
1706 | } | |
1707 | ||
f874d5d0 JS |
1708 | terminate_assoc = false; |
1709 | ||
e399441d | 1710 | done: |
78a7ac26 | 1711 | if (op->flags & FCOP_FLAGS_AEN) { |
27fa9bc5 | 1712 | nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); |
0a02e39f | 1713 | __nvme_fc_fcpop_chk_teardowns(ctrl, op); |
78a7ac26 JS |
1714 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
1715 | op->flags = FCOP_FLAGS_AEN; /* clear other flags */ | |
e399441d | 1716 | nvme_fc_ctrl_put(ctrl); |
f874d5d0 | 1717 | goto check_error; |
e399441d JS |
1718 | } |
1719 | ||
0a02e39f JS |
1720 | /* |
1721 | * Force failures of commands if we're killing the controller | |
1722 | * or have an error on a command used to create an new association | |
1723 | */ | |
1724 | if (status && | |
1725 | (blk_queue_dying(rq->q) || | |
1726 | ctrl->ctrl.state == NVME_CTRL_NEW || | |
1727 | ctrl->ctrl.state == NVME_CTRL_RECONNECTING)) | |
1728 | status |= cpu_to_le16(NVME_SC_DNR << 1); | |
1729 | ||
1730 | if (__nvme_fc_fcpop_chk_teardowns(ctrl, op)) | |
78a7ac26 | 1731 | __nvme_fc_final_op_cleanup(rq); |
0a02e39f JS |
1732 | else |
1733 | nvme_end_request(rq, status, result); | |
f874d5d0 JS |
1734 | |
1735 | check_error: | |
1736 | if (terminate_assoc) | |
1737 | nvme_fc_error_recovery(ctrl, "transport detected io error"); | |
e399441d JS |
1738 | } |
1739 | ||
1740 | static int | |
1741 | __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, | |
1742 | struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, | |
1743 | struct request *rq, u32 rqno) | |
1744 | { | |
1745 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1746 | int ret = 0; | |
1747 | ||
1748 | memset(op, 0, sizeof(*op)); | |
1749 | op->fcp_req.cmdaddr = &op->cmd_iu; | |
1750 | op->fcp_req.cmdlen = sizeof(op->cmd_iu); | |
1751 | op->fcp_req.rspaddr = &op->rsp_iu; | |
1752 | op->fcp_req.rsplen = sizeof(op->rsp_iu); | |
1753 | op->fcp_req.done = nvme_fc_fcpio_done; | |
1754 | op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; | |
1755 | op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; | |
1756 | op->ctrl = ctrl; | |
1757 | op->queue = queue; | |
1758 | op->rq = rq; | |
1759 | op->rqno = rqno; | |
1760 | ||
1761 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1762 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1763 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1764 | ||
1765 | op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, | |
1766 | &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1767 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { | |
1768 | dev_err(ctrl->dev, | |
1769 | "FCP Op failed - cmdiu dma mapping failed.\n"); | |
1770 | ret = EFAULT; | |
1771 | goto out_on_error; | |
1772 | } | |
1773 | ||
1774 | op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, | |
1775 | &op->rsp_iu, sizeof(op->rsp_iu), | |
1776 | DMA_FROM_DEVICE); | |
1777 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { | |
1778 | dev_err(ctrl->dev, | |
1779 | "FCP Op failed - rspiu dma mapping failed.\n"); | |
1780 | ret = EFAULT; | |
1781 | } | |
1782 | ||
1783 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1784 | out_on_error: | |
1785 | return ret; | |
1786 | } | |
1787 | ||
1788 | static int | |
d6296d39 CH |
1789 | nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, |
1790 | unsigned int hctx_idx, unsigned int numa_node) | |
e399441d | 1791 | { |
d6296d39 | 1792 | struct nvme_fc_ctrl *ctrl = set->driver_data; |
e399441d | 1793 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); |
76f983cb CH |
1794 | int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; |
1795 | struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; | |
e399441d JS |
1796 | |
1797 | return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); | |
1798 | } | |
1799 | ||
1800 | static int | |
1801 | nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1802 | { | |
1803 | struct nvme_fc_fcp_op *aen_op; | |
1804 | struct nvme_fc_cmd_iu *cmdiu; | |
1805 | struct nvme_command *sqe; | |
61bff8ef | 1806 | void *private; |
e399441d JS |
1807 | int i, ret; |
1808 | ||
1809 | aen_op = ctrl->aen_ops; | |
38dabe21 | 1810 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { |
61bff8ef JS |
1811 | private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, |
1812 | GFP_KERNEL); | |
1813 | if (!private) | |
1814 | return -ENOMEM; | |
1815 | ||
e399441d JS |
1816 | cmdiu = &aen_op->cmd_iu; |
1817 | sqe = &cmdiu->sqe; | |
1818 | ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], | |
1819 | aen_op, (struct request *)NULL, | |
38dabe21 | 1820 | (NVME_AQ_BLK_MQ_DEPTH + i)); |
61bff8ef JS |
1821 | if (ret) { |
1822 | kfree(private); | |
e399441d | 1823 | return ret; |
61bff8ef | 1824 | } |
e399441d | 1825 | |
78a7ac26 | 1826 | aen_op->flags = FCOP_FLAGS_AEN; |
61bff8ef JS |
1827 | aen_op->fcp_req.first_sgl = NULL; /* no sg list */ |
1828 | aen_op->fcp_req.private = private; | |
78a7ac26 | 1829 | |
e399441d JS |
1830 | memset(sqe, 0, sizeof(*sqe)); |
1831 | sqe->common.opcode = nvme_admin_async_event; | |
78a7ac26 | 1832 | /* Note: core layer may overwrite the sqe.command_id value */ |
38dabe21 | 1833 | sqe->common.command_id = NVME_AQ_BLK_MQ_DEPTH + i; |
e399441d JS |
1834 | } |
1835 | return 0; | |
1836 | } | |
1837 | ||
61bff8ef JS |
1838 | static void |
1839 | nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1840 | { | |
1841 | struct nvme_fc_fcp_op *aen_op; | |
1842 | int i; | |
1843 | ||
1844 | aen_op = ctrl->aen_ops; | |
38dabe21 | 1845 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { |
61bff8ef JS |
1846 | if (!aen_op->fcp_req.private) |
1847 | continue; | |
1848 | ||
1849 | __nvme_fc_exit_request(ctrl, aen_op); | |
1850 | ||
1851 | kfree(aen_op->fcp_req.private); | |
1852 | aen_op->fcp_req.private = NULL; | |
1853 | } | |
1854 | } | |
e399441d JS |
1855 | |
1856 | static inline void | |
1857 | __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, | |
1858 | unsigned int qidx) | |
1859 | { | |
1860 | struct nvme_fc_queue *queue = &ctrl->queues[qidx]; | |
1861 | ||
1862 | hctx->driver_data = queue; | |
1863 | queue->hctx = hctx; | |
1864 | } | |
1865 | ||
1866 | static int | |
1867 | nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1868 | unsigned int hctx_idx) | |
1869 | { | |
1870 | struct nvme_fc_ctrl *ctrl = data; | |
1871 | ||
1872 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); | |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | static int | |
1878 | nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1879 | unsigned int hctx_idx) | |
1880 | { | |
1881 | struct nvme_fc_ctrl *ctrl = data; | |
1882 | ||
1883 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); | |
1884 | ||
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | static void | |
08e15075 | 1889 | nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx) |
e399441d JS |
1890 | { |
1891 | struct nvme_fc_queue *queue; | |
1892 | ||
1893 | queue = &ctrl->queues[idx]; | |
1894 | memset(queue, 0, sizeof(*queue)); | |
1895 | queue->ctrl = ctrl; | |
1896 | queue->qnum = idx; | |
1897 | atomic_set(&queue->csn, 1); | |
1898 | queue->dev = ctrl->dev; | |
1899 | ||
1900 | if (idx > 0) | |
1901 | queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; | |
1902 | else | |
1903 | queue->cmnd_capsule_len = sizeof(struct nvme_command); | |
1904 | ||
e399441d JS |
1905 | /* |
1906 | * Considered whether we should allocate buffers for all SQEs | |
1907 | * and CQEs and dma map them - mapping their respective entries | |
1908 | * into the request structures (kernel vm addr and dma address) | |
1909 | * thus the driver could use the buffers/mappings directly. | |
1910 | * It only makes sense if the LLDD would use them for its | |
1911 | * messaging api. It's very unlikely most adapter api's would use | |
1912 | * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload | |
1913 | * structures were used instead. | |
1914 | */ | |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * This routine terminates a queue at the transport level. | |
1919 | * The transport has already ensured that all outstanding ios on | |
1920 | * the queue have been terminated. | |
1921 | * The transport will send a Disconnect LS request to terminate | |
1922 | * the queue's connection. Termination of the admin queue will also | |
1923 | * terminate the association at the target. | |
1924 | */ | |
1925 | static void | |
1926 | nvme_fc_free_queue(struct nvme_fc_queue *queue) | |
1927 | { | |
1928 | if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) | |
1929 | return; | |
1930 | ||
9e0ed16a | 1931 | clear_bit(NVME_FC_Q_LIVE, &queue->flags); |
e399441d JS |
1932 | /* |
1933 | * Current implementation never disconnects a single queue. | |
1934 | * It always terminates a whole association. So there is never | |
1935 | * a disconnect(queue) LS sent to the target. | |
1936 | */ | |
1937 | ||
1938 | queue->connection_id = 0; | |
e399441d JS |
1939 | } |
1940 | ||
1941 | static void | |
1942 | __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1943 | struct nvme_fc_queue *queue, unsigned int qidx) | |
1944 | { | |
1945 | if (ctrl->lport->ops->delete_queue) | |
1946 | ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, | |
1947 | queue->lldd_handle); | |
1948 | queue->lldd_handle = NULL; | |
1949 | } | |
1950 | ||
e399441d JS |
1951 | static void |
1952 | nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) | |
1953 | { | |
1954 | int i; | |
1955 | ||
d858e5f0 | 1956 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
e399441d JS |
1957 | nvme_fc_free_queue(&ctrl->queues[i]); |
1958 | } | |
1959 | ||
1960 | static int | |
1961 | __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1962 | struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) | |
1963 | { | |
1964 | int ret = 0; | |
1965 | ||
1966 | queue->lldd_handle = NULL; | |
1967 | if (ctrl->lport->ops->create_queue) | |
1968 | ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, | |
1969 | qidx, qsize, &queue->lldd_handle); | |
1970 | ||
1971 | return ret; | |
1972 | } | |
1973 | ||
1974 | static void | |
1975 | nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) | |
1976 | { | |
d858e5f0 | 1977 | struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; |
e399441d JS |
1978 | int i; |
1979 | ||
d858e5f0 | 1980 | for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) |
e399441d JS |
1981 | __nvme_fc_delete_hw_queue(ctrl, queue, i); |
1982 | } | |
1983 | ||
1984 | static int | |
1985 | nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1986 | { | |
1987 | struct nvme_fc_queue *queue = &ctrl->queues[1]; | |
17a1ec08 | 1988 | int i, ret; |
e399441d | 1989 | |
d858e5f0 | 1990 | for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { |
e399441d | 1991 | ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); |
17a1ec08 JT |
1992 | if (ret) |
1993 | goto delete_queues; | |
e399441d JS |
1994 | } |
1995 | ||
1996 | return 0; | |
17a1ec08 JT |
1997 | |
1998 | delete_queues: | |
1999 | for (; i >= 0; i--) | |
2000 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); | |
2001 | return ret; | |
e399441d JS |
2002 | } |
2003 | ||
2004 | static int | |
2005 | nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
2006 | { | |
2007 | int i, ret = 0; | |
2008 | ||
d858e5f0 | 2009 | for (i = 1; i < ctrl->ctrl.queue_count; i++) { |
e399441d JS |
2010 | ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, |
2011 | (qsize / 5)); | |
2012 | if (ret) | |
2013 | break; | |
2014 | ret = nvmf_connect_io_queue(&ctrl->ctrl, i); | |
2015 | if (ret) | |
2016 | break; | |
9e0ed16a SG |
2017 | |
2018 | set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags); | |
e399441d JS |
2019 | } |
2020 | ||
2021 | return ret; | |
2022 | } | |
2023 | ||
2024 | static void | |
2025 | nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) | |
2026 | { | |
2027 | int i; | |
2028 | ||
d858e5f0 | 2029 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
08e15075 | 2030 | nvme_fc_init_queue(ctrl, i); |
e399441d JS |
2031 | } |
2032 | ||
2033 | static void | |
2034 | nvme_fc_ctrl_free(struct kref *ref) | |
2035 | { | |
2036 | struct nvme_fc_ctrl *ctrl = | |
2037 | container_of(ref, struct nvme_fc_ctrl, ref); | |
2038 | unsigned long flags; | |
2039 | ||
61bff8ef JS |
2040 | if (ctrl->ctrl.tagset) { |
2041 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
2042 | blk_mq_free_tag_set(&ctrl->tag_set); | |
e399441d JS |
2043 | } |
2044 | ||
61bff8ef JS |
2045 | /* remove from rport list */ |
2046 | spin_lock_irqsave(&ctrl->rport->lock, flags); | |
2047 | list_del(&ctrl->ctrl_list); | |
2048 | spin_unlock_irqrestore(&ctrl->rport->lock, flags); | |
2049 | ||
f9c5af5f | 2050 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2051 | blk_cleanup_queue(ctrl->ctrl.admin_q); |
2052 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
2053 | ||
2054 | kfree(ctrl->queues); | |
2055 | ||
e399441d JS |
2056 | put_device(ctrl->dev); |
2057 | nvme_fc_rport_put(ctrl->rport); | |
2058 | ||
e399441d | 2059 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
de41447a EM |
2060 | if (ctrl->ctrl.opts) |
2061 | nvmf_free_options(ctrl->ctrl.opts); | |
e399441d JS |
2062 | kfree(ctrl); |
2063 | } | |
2064 | ||
2065 | static void | |
2066 | nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) | |
2067 | { | |
2068 | kref_put(&ctrl->ref, nvme_fc_ctrl_free); | |
2069 | } | |
2070 | ||
2071 | static int | |
2072 | nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) | |
2073 | { | |
2074 | return kref_get_unless_zero(&ctrl->ref); | |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * All accesses from nvme core layer done - can now free the | |
2079 | * controller. Called after last nvme_put_ctrl() call | |
2080 | */ | |
2081 | static void | |
61bff8ef | 2082 | nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) |
e399441d JS |
2083 | { |
2084 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2085 | ||
2086 | WARN_ON(nctrl != &ctrl->ctrl); | |
2087 | ||
61bff8ef JS |
2088 | nvme_fc_ctrl_put(ctrl); |
2089 | } | |
e399441d | 2090 | |
61bff8ef JS |
2091 | static void |
2092 | nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) | |
2093 | { | |
69fa9646 JS |
2094 | /* only proceed if in LIVE state - e.g. on first error */ |
2095 | if (ctrl->ctrl.state != NVME_CTRL_LIVE) | |
2096 | return; | |
2097 | ||
61bff8ef JS |
2098 | dev_warn(ctrl->ctrl.device, |
2099 | "NVME-FC{%d}: transport association error detected: %s\n", | |
2100 | ctrl->cnum, errmsg); | |
589ff775 | 2101 | dev_warn(ctrl->ctrl.device, |
61bff8ef | 2102 | "NVME-FC{%d}: resetting controller\n", ctrl->cnum); |
e399441d | 2103 | |
d86c4d8e | 2104 | nvme_reset_ctrl(&ctrl->ctrl); |
e399441d JS |
2105 | } |
2106 | ||
baee29ac | 2107 | static enum blk_eh_timer_return |
e399441d JS |
2108 | nvme_fc_timeout(struct request *rq, bool reserved) |
2109 | { | |
2110 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2111 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
2112 | int ret; | |
2113 | ||
134aedc9 JS |
2114 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE || |
2115 | atomic_read(&op->state) == FCPOP_STATE_ABORTED) | |
e399441d JS |
2116 | return BLK_EH_RESET_TIMER; |
2117 | ||
2118 | ret = __nvme_fc_abort_op(ctrl, op); | |
2119 | if (ret) | |
134aedc9 JS |
2120 | /* io wasn't active to abort */ |
2121 | return BLK_EH_NOT_HANDLED; | |
e399441d JS |
2122 | |
2123 | /* | |
61bff8ef JS |
2124 | * we can't individually ABTS an io without affecting the queue, |
2125 | * thus killing the queue, adn thus the association. | |
2126 | * So resolve by performing a controller reset, which will stop | |
2127 | * the host/io stack, terminate the association on the link, | |
2128 | * and recreate an association on the link. | |
e399441d | 2129 | */ |
61bff8ef | 2130 | nvme_fc_error_recovery(ctrl, "io timeout error"); |
e399441d | 2131 | |
134aedc9 JS |
2132 | /* |
2133 | * the io abort has been initiated. Have the reset timer | |
2134 | * restarted and the abort completion will complete the io | |
2135 | * shortly. Avoids a synchronous wait while the abort finishes. | |
2136 | */ | |
2137 | return BLK_EH_RESET_TIMER; | |
e399441d JS |
2138 | } |
2139 | ||
2140 | static int | |
2141 | nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
2142 | struct nvme_fc_fcp_op *op) | |
2143 | { | |
2144 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
e399441d JS |
2145 | enum dma_data_direction dir; |
2146 | int ret; | |
2147 | ||
2148 | freq->sg_cnt = 0; | |
2149 | ||
b131c61d | 2150 | if (!blk_rq_payload_bytes(rq)) |
e399441d JS |
2151 | return 0; |
2152 | ||
2153 | freq->sg_table.sgl = freq->first_sgl; | |
19e420bb CH |
2154 | ret = sg_alloc_table_chained(&freq->sg_table, |
2155 | blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); | |
e399441d JS |
2156 | if (ret) |
2157 | return -ENOMEM; | |
2158 | ||
2159 | op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); | |
19e420bb | 2160 | WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); |
e399441d JS |
2161 | dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
2162 | freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, | |
2163 | op->nents, dir); | |
2164 | if (unlikely(freq->sg_cnt <= 0)) { | |
2165 | sg_free_table_chained(&freq->sg_table, true); | |
2166 | freq->sg_cnt = 0; | |
2167 | return -EFAULT; | |
2168 | } | |
2169 | ||
2170 | /* | |
2171 | * TODO: blk_integrity_rq(rq) for DIF | |
2172 | */ | |
2173 | return 0; | |
2174 | } | |
2175 | ||
2176 | static void | |
2177 | nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
2178 | struct nvme_fc_fcp_op *op) | |
2179 | { | |
2180 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
2181 | ||
2182 | if (!freq->sg_cnt) | |
2183 | return; | |
2184 | ||
2185 | fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, | |
2186 | ((rq_data_dir(rq) == WRITE) ? | |
2187 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
2188 | ||
2189 | nvme_cleanup_cmd(rq); | |
2190 | ||
2191 | sg_free_table_chained(&freq->sg_table, true); | |
2192 | ||
2193 | freq->sg_cnt = 0; | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * In FC, the queue is a logical thing. At transport connect, the target | |
2198 | * creates its "queue" and returns a handle that is to be given to the | |
2199 | * target whenever it posts something to the corresponding SQ. When an | |
2200 | * SQE is sent on a SQ, FC effectively considers the SQE, or rather the | |
2201 | * command contained within the SQE, an io, and assigns a FC exchange | |
2202 | * to it. The SQE and the associated SQ handle are sent in the initial | |
2203 | * CMD IU sents on the exchange. All transfers relative to the io occur | |
2204 | * as part of the exchange. The CQE is the last thing for the io, | |
2205 | * which is transferred (explicitly or implicitly) with the RSP IU | |
2206 | * sent on the exchange. After the CQE is received, the FC exchange is | |
2207 | * terminaed and the Exchange may be used on a different io. | |
2208 | * | |
2209 | * The transport to LLDD api has the transport making a request for a | |
2210 | * new fcp io request to the LLDD. The LLDD then allocates a FC exchange | |
2211 | * resource and transfers the command. The LLDD will then process all | |
2212 | * steps to complete the io. Upon completion, the transport done routine | |
2213 | * is called. | |
2214 | * | |
2215 | * So - while the operation is outstanding to the LLDD, there is a link | |
2216 | * level FC exchange resource that is also outstanding. This must be | |
2217 | * considered in all cleanup operations. | |
2218 | */ | |
fc17b653 | 2219 | static blk_status_t |
e399441d JS |
2220 | nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, |
2221 | struct nvme_fc_fcp_op *op, u32 data_len, | |
2222 | enum nvmefc_fcp_datadir io_dir) | |
2223 | { | |
2224 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2225 | struct nvme_command *sqe = &cmdiu->sqe; | |
2226 | u32 csn; | |
2227 | int ret; | |
2228 | ||
61bff8ef JS |
2229 | /* |
2230 | * before attempting to send the io, check to see if we believe | |
2231 | * the target device is present | |
2232 | */ | |
2233 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) | |
8b25f351 | 2234 | goto busy; |
61bff8ef | 2235 | |
e399441d | 2236 | if (!nvme_fc_ctrl_get(ctrl)) |
fc17b653 | 2237 | return BLK_STS_IOERR; |
e399441d JS |
2238 | |
2239 | /* format the FC-NVME CMD IU and fcp_req */ | |
2240 | cmdiu->connection_id = cpu_to_be64(queue->connection_id); | |
2241 | csn = atomic_inc_return(&queue->csn); | |
2242 | cmdiu->csn = cpu_to_be32(csn); | |
2243 | cmdiu->data_len = cpu_to_be32(data_len); | |
2244 | switch (io_dir) { | |
2245 | case NVMEFC_FCP_WRITE: | |
2246 | cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; | |
2247 | break; | |
2248 | case NVMEFC_FCP_READ: | |
2249 | cmdiu->flags = FCNVME_CMD_FLAGS_READ; | |
2250 | break; | |
2251 | case NVMEFC_FCP_NODATA: | |
2252 | cmdiu->flags = 0; | |
2253 | break; | |
2254 | } | |
2255 | op->fcp_req.payload_length = data_len; | |
2256 | op->fcp_req.io_dir = io_dir; | |
2257 | op->fcp_req.transferred_length = 0; | |
2258 | op->fcp_req.rcv_rsplen = 0; | |
62eeacb0 | 2259 | op->fcp_req.status = NVME_SC_SUCCESS; |
e399441d JS |
2260 | op->fcp_req.sqid = cpu_to_le16(queue->qnum); |
2261 | ||
2262 | /* | |
2263 | * validate per fabric rules, set fields mandated by fabric spec | |
2264 | * as well as those by FC-NVME spec. | |
2265 | */ | |
2266 | WARN_ON_ONCE(sqe->common.metadata); | |
e399441d JS |
2267 | sqe->common.flags |= NVME_CMD_SGL_METABUF; |
2268 | ||
2269 | /* | |
d9d34c0b JS |
2270 | * format SQE DPTR field per FC-NVME rules: |
2271 | * type=0x5 Transport SGL Data Block Descriptor | |
2272 | * subtype=0xA Transport-specific value | |
2273 | * address=0 | |
2274 | * length=length of the data series | |
e399441d | 2275 | */ |
d9d34c0b JS |
2276 | sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | |
2277 | NVME_SGL_FMT_TRANSPORT_A; | |
e399441d JS |
2278 | sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); |
2279 | sqe->rw.dptr.sgl.addr = 0; | |
2280 | ||
78a7ac26 | 2281 | if (!(op->flags & FCOP_FLAGS_AEN)) { |
e399441d JS |
2282 | ret = nvme_fc_map_data(ctrl, op->rq, op); |
2283 | if (ret < 0) { | |
e399441d JS |
2284 | nvme_cleanup_cmd(op->rq); |
2285 | nvme_fc_ctrl_put(ctrl); | |
fc17b653 CH |
2286 | if (ret == -ENOMEM || ret == -EAGAIN) |
2287 | return BLK_STS_RESOURCE; | |
2288 | return BLK_STS_IOERR; | |
e399441d JS |
2289 | } |
2290 | } | |
2291 | ||
2292 | fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, | |
2293 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
2294 | ||
2295 | atomic_set(&op->state, FCPOP_STATE_ACTIVE); | |
2296 | ||
78a7ac26 | 2297 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d JS |
2298 | blk_mq_start_request(op->rq); |
2299 | ||
2300 | ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, | |
2301 | &ctrl->rport->remoteport, | |
2302 | queue->lldd_handle, &op->fcp_req); | |
2303 | ||
2304 | if (ret) { | |
8b25f351 | 2305 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d | 2306 | nvme_fc_unmap_data(ctrl, op->rq, op); |
e399441d JS |
2307 | |
2308 | nvme_fc_ctrl_put(ctrl); | |
2309 | ||
8b25f351 JS |
2310 | if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && |
2311 | ret != -EBUSY) | |
fc17b653 | 2312 | return BLK_STS_IOERR; |
e399441d | 2313 | |
8b25f351 | 2314 | goto busy; |
e399441d JS |
2315 | } |
2316 | ||
fc17b653 | 2317 | return BLK_STS_OK; |
8b25f351 JS |
2318 | |
2319 | busy: | |
2320 | if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx) | |
2321 | blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY); | |
2322 | ||
2323 | return BLK_STS_RESOURCE; | |
e399441d JS |
2324 | } |
2325 | ||
9e0ed16a SG |
2326 | static inline blk_status_t nvme_fc_is_ready(struct nvme_fc_queue *queue, |
2327 | struct request *rq) | |
2328 | { | |
2329 | if (unlikely(!test_bit(NVME_FC_Q_LIVE, &queue->flags))) | |
2330 | return nvmf_check_init_req(&queue->ctrl->ctrl, rq); | |
2331 | return BLK_STS_OK; | |
2332 | } | |
2333 | ||
fc17b653 | 2334 | static blk_status_t |
e399441d JS |
2335 | nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, |
2336 | const struct blk_mq_queue_data *bd) | |
2337 | { | |
2338 | struct nvme_ns *ns = hctx->queue->queuedata; | |
2339 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2340 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2341 | struct request *rq = bd->rq; | |
2342 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2343 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2344 | struct nvme_command *sqe = &cmdiu->sqe; | |
2345 | enum nvmefc_fcp_datadir io_dir; | |
2346 | u32 data_len; | |
fc17b653 | 2347 | blk_status_t ret; |
e399441d | 2348 | |
9e0ed16a SG |
2349 | ret = nvme_fc_is_ready(queue, rq); |
2350 | if (unlikely(ret)) | |
2351 | return ret; | |
2352 | ||
e399441d JS |
2353 | ret = nvme_setup_cmd(ns, rq, sqe); |
2354 | if (ret) | |
2355 | return ret; | |
2356 | ||
b131c61d | 2357 | data_len = blk_rq_payload_bytes(rq); |
e399441d JS |
2358 | if (data_len) |
2359 | io_dir = ((rq_data_dir(rq) == WRITE) ? | |
2360 | NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); | |
2361 | else | |
2362 | io_dir = NVMEFC_FCP_NODATA; | |
2363 | ||
2364 | return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); | |
2365 | } | |
2366 | ||
2367 | static struct blk_mq_tags * | |
2368 | nvme_fc_tagset(struct nvme_fc_queue *queue) | |
2369 | { | |
2370 | if (queue->qnum == 0) | |
2371 | return queue->ctrl->admin_tag_set.tags[queue->qnum]; | |
2372 | ||
2373 | return queue->ctrl->tag_set.tags[queue->qnum - 1]; | |
2374 | } | |
2375 | ||
2376 | static int | |
2377 | nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) | |
2378 | ||
2379 | { | |
2380 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2381 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2382 | struct request *req; | |
2383 | struct nvme_fc_fcp_op *op; | |
2384 | ||
2385 | req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); | |
61bff8ef | 2386 | if (!req) |
e399441d | 2387 | return 0; |
e399441d JS |
2388 | |
2389 | op = blk_mq_rq_to_pdu(req); | |
2390 | ||
2391 | if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && | |
2392 | (ctrl->lport->ops->poll_queue)) | |
2393 | ctrl->lport->ops->poll_queue(&ctrl->lport->localport, | |
2394 | queue->lldd_handle); | |
2395 | ||
2396 | return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); | |
2397 | } | |
2398 | ||
2399 | static void | |
ad22c355 | 2400 | nvme_fc_submit_async_event(struct nvme_ctrl *arg) |
e399441d JS |
2401 | { |
2402 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); | |
2403 | struct nvme_fc_fcp_op *aen_op; | |
61bff8ef JS |
2404 | unsigned long flags; |
2405 | bool terminating = false; | |
fc17b653 | 2406 | blk_status_t ret; |
e399441d | 2407 | |
61bff8ef JS |
2408 | spin_lock_irqsave(&ctrl->lock, flags); |
2409 | if (ctrl->flags & FCCTRL_TERMIO) | |
2410 | terminating = true; | |
2411 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2412 | ||
2413 | if (terminating) | |
2414 | return; | |
2415 | ||
ad22c355 | 2416 | aen_op = &ctrl->aen_ops[0]; |
e399441d JS |
2417 | |
2418 | ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, | |
2419 | NVMEFC_FCP_NODATA); | |
2420 | if (ret) | |
2421 | dev_err(ctrl->ctrl.device, | |
ad22c355 | 2422 | "failed async event work\n"); |
e399441d JS |
2423 | } |
2424 | ||
2425 | static void | |
78a7ac26 | 2426 | __nvme_fc_final_op_cleanup(struct request *rq) |
e399441d JS |
2427 | { |
2428 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2429 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
e399441d | 2430 | |
78a7ac26 JS |
2431 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
2432 | op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | | |
2433 | FCOP_FLAGS_COMPLETE); | |
e399441d | 2434 | |
e399441d | 2435 | nvme_fc_unmap_data(ctrl, rq, op); |
77f02a7a | 2436 | nvme_complete_rq(rq); |
e399441d JS |
2437 | nvme_fc_ctrl_put(ctrl); |
2438 | ||
e399441d JS |
2439 | } |
2440 | ||
78a7ac26 JS |
2441 | static void |
2442 | nvme_fc_complete_rq(struct request *rq) | |
2443 | { | |
2444 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2445 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
2446 | unsigned long flags; | |
2447 | bool completed = false; | |
2448 | ||
2449 | /* | |
2450 | * the core layer, on controller resets after calling | |
2451 | * nvme_shutdown_ctrl(), calls complete_rq without our | |
2452 | * calling blk_mq_complete_request(), thus there may still | |
2453 | * be live i/o outstanding with the LLDD. Means transport has | |
2454 | * to track complete calls vs fcpio_done calls to know what | |
2455 | * path to take on completes and dones. | |
2456 | */ | |
2457 | spin_lock_irqsave(&ctrl->lock, flags); | |
2458 | if (op->flags & FCOP_FLAGS_COMPLETE) | |
2459 | completed = true; | |
2460 | else | |
2461 | op->flags |= FCOP_FLAGS_RELEASED; | |
2462 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2463 | ||
2464 | if (completed) | |
2465 | __nvme_fc_final_op_cleanup(rq); | |
2466 | } | |
2467 | ||
e399441d JS |
2468 | /* |
2469 | * This routine is used by the transport when it needs to find active | |
2470 | * io on a queue that is to be terminated. The transport uses | |
2471 | * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke | |
2472 | * this routine to kill them on a 1 by 1 basis. | |
2473 | * | |
2474 | * As FC allocates FC exchange for each io, the transport must contact | |
2475 | * the LLDD to terminate the exchange, thus releasing the FC exchange. | |
2476 | * After terminating the exchange the LLDD will call the transport's | |
2477 | * normal io done path for the request, but it will have an aborted | |
2478 | * status. The done path will return the io request back to the block | |
2479 | * layer with an error status. | |
2480 | */ | |
2481 | static void | |
2482 | nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) | |
2483 | { | |
2484 | struct nvme_ctrl *nctrl = data; | |
2485 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2486 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); | |
78a7ac26 JS |
2487 | unsigned long flags; |
2488 | int status; | |
e399441d JS |
2489 | |
2490 | if (!blk_mq_request_started(req)) | |
2491 | return; | |
2492 | ||
78a7ac26 | 2493 | spin_lock_irqsave(&ctrl->lock, flags); |
61bff8ef JS |
2494 | if (ctrl->flags & FCCTRL_TERMIO) { |
2495 | ctrl->iocnt++; | |
2496 | op->flags |= FCOP_FLAGS_TERMIO; | |
2497 | } | |
78a7ac26 JS |
2498 | spin_unlock_irqrestore(&ctrl->lock, flags); |
2499 | ||
e399441d | 2500 | status = __nvme_fc_abort_op(ctrl, op); |
78a7ac26 JS |
2501 | if (status) { |
2502 | /* | |
2503 | * if __nvme_fc_abort_op failed the io wasn't | |
2504 | * active. Thus this call path is running in | |
2505 | * parallel to the io complete. Treat as non-error. | |
2506 | */ | |
2507 | ||
2508 | /* back out the flags/counters */ | |
2509 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
2510 | if (ctrl->flags & FCCTRL_TERMIO) |
2511 | ctrl->iocnt--; | |
78a7ac26 JS |
2512 | op->flags &= ~FCOP_FLAGS_TERMIO; |
2513 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
e399441d | 2514 | return; |
78a7ac26 | 2515 | } |
e399441d JS |
2516 | } |
2517 | ||
78a7ac26 | 2518 | |
61bff8ef JS |
2519 | static const struct blk_mq_ops nvme_fc_mq_ops = { |
2520 | .queue_rq = nvme_fc_queue_rq, | |
2521 | .complete = nvme_fc_complete_rq, | |
2522 | .init_request = nvme_fc_init_request, | |
2523 | .exit_request = nvme_fc_exit_request, | |
61bff8ef JS |
2524 | .init_hctx = nvme_fc_init_hctx, |
2525 | .poll = nvme_fc_poll, | |
2526 | .timeout = nvme_fc_timeout, | |
2527 | }; | |
e399441d | 2528 | |
61bff8ef JS |
2529 | static int |
2530 | nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) | |
e399441d | 2531 | { |
61bff8ef | 2532 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; |
7314183d | 2533 | unsigned int nr_io_queues; |
61bff8ef | 2534 | int ret; |
e399441d | 2535 | |
7314183d SG |
2536 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2537 | ctrl->lport->ops->max_hw_queues); | |
2538 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
61bff8ef JS |
2539 | if (ret) { |
2540 | dev_info(ctrl->ctrl.device, | |
2541 | "set_queue_count failed: %d\n", ret); | |
2542 | return ret; | |
2543 | } | |
e399441d | 2544 | |
7314183d SG |
2545 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
2546 | if (!nr_io_queues) | |
61bff8ef | 2547 | return 0; |
e399441d | 2548 | |
61bff8ef | 2549 | nvme_fc_init_io_queues(ctrl); |
e399441d | 2550 | |
61bff8ef JS |
2551 | memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); |
2552 | ctrl->tag_set.ops = &nvme_fc_mq_ops; | |
2553 | ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; | |
2554 | ctrl->tag_set.reserved_tags = 1; /* fabric connect */ | |
2555 | ctrl->tag_set.numa_node = NUMA_NO_NODE; | |
2556 | ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; | |
2557 | ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
2558 | (SG_CHUNK_SIZE * | |
2559 | sizeof(struct scatterlist)) + | |
2560 | ctrl->lport->ops->fcprqst_priv_sz; | |
2561 | ctrl->tag_set.driver_data = ctrl; | |
d858e5f0 | 2562 | ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; |
61bff8ef | 2563 | ctrl->tag_set.timeout = NVME_IO_TIMEOUT; |
e399441d | 2564 | |
61bff8ef JS |
2565 | ret = blk_mq_alloc_tag_set(&ctrl->tag_set); |
2566 | if (ret) | |
2567 | return ret; | |
e399441d | 2568 | |
61bff8ef | 2569 | ctrl->ctrl.tagset = &ctrl->tag_set; |
e399441d | 2570 | |
61bff8ef JS |
2571 | ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); |
2572 | if (IS_ERR(ctrl->ctrl.connect_q)) { | |
2573 | ret = PTR_ERR(ctrl->ctrl.connect_q); | |
2574 | goto out_free_tag_set; | |
2575 | } | |
e399441d | 2576 | |
61bff8ef | 2577 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
e399441d | 2578 | if (ret) |
61bff8ef | 2579 | goto out_cleanup_blk_queue; |
e399441d | 2580 | |
61bff8ef JS |
2581 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
2582 | if (ret) | |
2583 | goto out_delete_hw_queues; | |
e399441d JS |
2584 | |
2585 | return 0; | |
e399441d | 2586 | |
61bff8ef JS |
2587 | out_delete_hw_queues: |
2588 | nvme_fc_delete_hw_io_queues(ctrl); | |
2589 | out_cleanup_blk_queue: | |
61bff8ef JS |
2590 | blk_cleanup_queue(ctrl->ctrl.connect_q); |
2591 | out_free_tag_set: | |
2592 | blk_mq_free_tag_set(&ctrl->tag_set); | |
2593 | nvme_fc_free_io_queues(ctrl); | |
e399441d | 2594 | |
61bff8ef JS |
2595 | /* force put free routine to ignore io queues */ |
2596 | ctrl->ctrl.tagset = NULL; | |
2597 | ||
2598 | return ret; | |
2599 | } | |
e399441d JS |
2600 | |
2601 | static int | |
61bff8ef | 2602 | nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
2603 | { |
2604 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
7314183d | 2605 | unsigned int nr_io_queues; |
e399441d JS |
2606 | int ret; |
2607 | ||
7314183d SG |
2608 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2609 | ctrl->lport->ops->max_hw_queues); | |
2610 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
e399441d JS |
2611 | if (ret) { |
2612 | dev_info(ctrl->ctrl.device, | |
2613 | "set_queue_count failed: %d\n", ret); | |
2614 | return ret; | |
2615 | } | |
2616 | ||
7314183d | 2617 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
61bff8ef | 2618 | /* check for io queues existing */ |
d858e5f0 | 2619 | if (ctrl->ctrl.queue_count == 1) |
e399441d JS |
2620 | return 0; |
2621 | ||
e399441d JS |
2622 | nvme_fc_init_io_queues(ctrl); |
2623 | ||
31b84460 | 2624 | ret = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.tagset); |
e399441d | 2625 | if (ret) |
61bff8ef | 2626 | goto out_free_io_queues; |
e399441d JS |
2627 | |
2628 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2629 | if (ret) | |
61bff8ef | 2630 | goto out_free_io_queues; |
e399441d JS |
2631 | |
2632 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2633 | if (ret) | |
2634 | goto out_delete_hw_queues; | |
2635 | ||
cda5fd1a SG |
2636 | blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); |
2637 | ||
e399441d JS |
2638 | return 0; |
2639 | ||
2640 | out_delete_hw_queues: | |
2641 | nvme_fc_delete_hw_io_queues(ctrl); | |
61bff8ef | 2642 | out_free_io_queues: |
e399441d | 2643 | nvme_fc_free_io_queues(ctrl); |
61bff8ef JS |
2644 | return ret; |
2645 | } | |
e399441d | 2646 | |
158bfb88 JS |
2647 | static void |
2648 | nvme_fc_rport_active_on_lport(struct nvme_fc_rport *rport) | |
2649 | { | |
2650 | struct nvme_fc_lport *lport = rport->lport; | |
2651 | ||
2652 | atomic_inc(&lport->act_rport_cnt); | |
2653 | } | |
2654 | ||
2655 | static void | |
2656 | nvme_fc_rport_inactive_on_lport(struct nvme_fc_rport *rport) | |
2657 | { | |
2658 | struct nvme_fc_lport *lport = rport->lport; | |
2659 | u32 cnt; | |
2660 | ||
2661 | cnt = atomic_dec_return(&lport->act_rport_cnt); | |
2662 | if (cnt == 0 && lport->localport.port_state == FC_OBJSTATE_DELETED) | |
2663 | lport->ops->localport_delete(&lport->localport); | |
2664 | } | |
2665 | ||
2666 | static int | |
2667 | nvme_fc_ctlr_active_on_rport(struct nvme_fc_ctrl *ctrl) | |
2668 | { | |
2669 | struct nvme_fc_rport *rport = ctrl->rport; | |
2670 | u32 cnt; | |
2671 | ||
2672 | if (ctrl->assoc_active) | |
2673 | return 1; | |
2674 | ||
2675 | ctrl->assoc_active = true; | |
2676 | cnt = atomic_inc_return(&rport->act_ctrl_cnt); | |
2677 | if (cnt == 1) | |
2678 | nvme_fc_rport_active_on_lport(rport); | |
2679 | ||
2680 | return 0; | |
2681 | } | |
2682 | ||
2683 | static int | |
2684 | nvme_fc_ctlr_inactive_on_rport(struct nvme_fc_ctrl *ctrl) | |
2685 | { | |
2686 | struct nvme_fc_rport *rport = ctrl->rport; | |
2687 | struct nvme_fc_lport *lport = rport->lport; | |
2688 | u32 cnt; | |
2689 | ||
2690 | /* ctrl->assoc_active=false will be set independently */ | |
2691 | ||
2692 | cnt = atomic_dec_return(&rport->act_ctrl_cnt); | |
2693 | if (cnt == 0) { | |
2694 | if (rport->remoteport.port_state == FC_OBJSTATE_DELETED) | |
2695 | lport->ops->remoteport_delete(&rport->remoteport); | |
2696 | nvme_fc_rport_inactive_on_lport(rport); | |
2697 | } | |
2698 | ||
2699 | return 0; | |
2700 | } | |
2701 | ||
61bff8ef JS |
2702 | /* |
2703 | * This routine restarts the controller on the host side, and | |
2704 | * on the link side, recreates the controller association. | |
2705 | */ | |
2706 | static int | |
2707 | nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) | |
2708 | { | |
2709 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
61bff8ef JS |
2710 | int ret; |
2711 | bool changed; | |
2712 | ||
fdf9dfa8 | 2713 | ++ctrl->ctrl.nr_reconnects; |
61bff8ef | 2714 | |
96e24801 JS |
2715 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
2716 | return -ENODEV; | |
2717 | ||
158bfb88 JS |
2718 | if (nvme_fc_ctlr_active_on_rport(ctrl)) |
2719 | return -ENOTUNIQ; | |
2720 | ||
61bff8ef JS |
2721 | /* |
2722 | * Create the admin queue | |
2723 | */ | |
2724 | ||
08e15075 | 2725 | nvme_fc_init_queue(ctrl, 0); |
61bff8ef JS |
2726 | |
2727 | ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, | |
38dabe21 | 2728 | NVME_AQ_BLK_MQ_DEPTH); |
61bff8ef JS |
2729 | if (ret) |
2730 | goto out_free_queue; | |
2731 | ||
2732 | ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], | |
38dabe21 KB |
2733 | NVME_AQ_BLK_MQ_DEPTH, |
2734 | (NVME_AQ_BLK_MQ_DEPTH / 4)); | |
61bff8ef JS |
2735 | if (ret) |
2736 | goto out_delete_hw_queue; | |
2737 | ||
2738 | if (ctrl->ctrl.state != NVME_CTRL_NEW) | |
f9c5af5f | 2739 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2740 | |
2741 | ret = nvmf_connect_admin_queue(&ctrl->ctrl); | |
2742 | if (ret) | |
2743 | goto out_disconnect_admin_queue; | |
2744 | ||
9e0ed16a SG |
2745 | set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); |
2746 | ||
61bff8ef JS |
2747 | /* |
2748 | * Check controller capabilities | |
2749 | * | |
2750 | * todo:- add code to check if ctrl attributes changed from | |
2751 | * prior connection values | |
2752 | */ | |
2753 | ||
20d0dfe6 | 2754 | ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); |
61bff8ef JS |
2755 | if (ret) { |
2756 | dev_err(ctrl->ctrl.device, | |
2757 | "prop_get NVME_REG_CAP failed\n"); | |
2758 | goto out_disconnect_admin_queue; | |
2759 | } | |
2760 | ||
2761 | ctrl->ctrl.sqsize = | |
20d0dfe6 | 2762 | min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap) + 1, ctrl->ctrl.sqsize); |
61bff8ef | 2763 | |
20d0dfe6 | 2764 | ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); |
61bff8ef JS |
2765 | if (ret) |
2766 | goto out_disconnect_admin_queue; | |
2767 | ||
ecad0d2c JS |
2768 | ctrl->ctrl.max_hw_sectors = |
2769 | (ctrl->lport->ops->max_sgl_segments - 1) << (PAGE_SHIFT - 9); | |
61bff8ef JS |
2770 | |
2771 | ret = nvme_init_identify(&ctrl->ctrl); | |
2772 | if (ret) | |
2773 | goto out_disconnect_admin_queue; | |
2774 | ||
2775 | /* sanity checks */ | |
2776 | ||
2777 | /* FC-NVME does not have other data in the capsule */ | |
2778 | if (ctrl->ctrl.icdoff) { | |
2779 | dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", | |
2780 | ctrl->ctrl.icdoff); | |
2781 | goto out_disconnect_admin_queue; | |
2782 | } | |
2783 | ||
61bff8ef JS |
2784 | /* FC-NVME supports normal SGL Data Block Descriptors */ |
2785 | ||
2786 | if (opts->queue_size > ctrl->ctrl.maxcmd) { | |
2787 | /* warn if maxcmd is lower than queue_size */ | |
2788 | dev_warn(ctrl->ctrl.device, | |
2789 | "queue_size %zu > ctrl maxcmd %u, reducing " | |
2790 | "to queue_size\n", | |
2791 | opts->queue_size, ctrl->ctrl.maxcmd); | |
2792 | opts->queue_size = ctrl->ctrl.maxcmd; | |
2793 | } | |
2794 | ||
2795 | ret = nvme_fc_init_aen_ops(ctrl); | |
2796 | if (ret) | |
2797 | goto out_term_aen_ops; | |
2798 | ||
2799 | /* | |
2800 | * Create the io queues | |
2801 | */ | |
2802 | ||
d858e5f0 | 2803 | if (ctrl->ctrl.queue_count > 1) { |
61bff8ef JS |
2804 | if (ctrl->ctrl.state == NVME_CTRL_NEW) |
2805 | ret = nvme_fc_create_io_queues(ctrl); | |
2806 | else | |
2807 | ret = nvme_fc_reinit_io_queues(ctrl); | |
2808 | if (ret) | |
2809 | goto out_term_aen_ops; | |
2810 | } | |
2811 | ||
2812 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
61bff8ef | 2813 | |
fdf9dfa8 | 2814 | ctrl->ctrl.nr_reconnects = 0; |
61bff8ef | 2815 | |
44c6ec77 JS |
2816 | if (changed) |
2817 | nvme_start_ctrl(&ctrl->ctrl); | |
61bff8ef JS |
2818 | |
2819 | return 0; /* Success */ | |
2820 | ||
2821 | out_term_aen_ops: | |
2822 | nvme_fc_term_aen_ops(ctrl); | |
61bff8ef JS |
2823 | out_disconnect_admin_queue: |
2824 | /* send a Disconnect(association) LS to fc-nvme target */ | |
2825 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2826 | out_delete_hw_queue: | |
2827 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2828 | out_free_queue: | |
2829 | nvme_fc_free_queue(&ctrl->queues[0]); | |
158bfb88 JS |
2830 | ctrl->assoc_active = false; |
2831 | nvme_fc_ctlr_inactive_on_rport(ctrl); | |
e399441d JS |
2832 | |
2833 | return ret; | |
2834 | } | |
2835 | ||
61bff8ef JS |
2836 | /* |
2837 | * This routine stops operation of the controller on the host side. | |
2838 | * On the host os stack side: Admin and IO queues are stopped, | |
2839 | * outstanding ios on them terminated via FC ABTS. | |
2840 | * On the link side: the association is terminated. | |
2841 | */ | |
2842 | static void | |
2843 | nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) | |
2844 | { | |
2845 | unsigned long flags; | |
2846 | ||
158bfb88 JS |
2847 | if (!ctrl->assoc_active) |
2848 | return; | |
2849 | ctrl->assoc_active = false; | |
2850 | ||
61bff8ef JS |
2851 | spin_lock_irqsave(&ctrl->lock, flags); |
2852 | ctrl->flags |= FCCTRL_TERMIO; | |
2853 | ctrl->iocnt = 0; | |
2854 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2855 | ||
2856 | /* | |
2857 | * If io queues are present, stop them and terminate all outstanding | |
2858 | * ios on them. As FC allocates FC exchange for each io, the | |
2859 | * transport must contact the LLDD to terminate the exchange, | |
2860 | * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() | |
2861 | * to tell us what io's are busy and invoke a transport routine | |
2862 | * to kill them with the LLDD. After terminating the exchange | |
2863 | * the LLDD will call the transport's normal io done path, but it | |
2864 | * will have an aborted status. The done path will return the | |
2865 | * io requests back to the block layer as part of normal completions | |
2866 | * (but with error status). | |
2867 | */ | |
d858e5f0 | 2868 | if (ctrl->ctrl.queue_count > 1) { |
61bff8ef JS |
2869 | nvme_stop_queues(&ctrl->ctrl); |
2870 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
2871 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2872 | } | |
2873 | ||
2874 | /* | |
2875 | * Other transports, which don't have link-level contexts bound | |
2876 | * to sqe's, would try to gracefully shutdown the controller by | |
2877 | * writing the registers for shutdown and polling (call | |
2878 | * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially | |
2879 | * just aborted and we will wait on those contexts, and given | |
2880 | * there was no indication of how live the controlelr is on the | |
2881 | * link, don't send more io to create more contexts for the | |
2882 | * shutdown. Let the controller fail via keepalive failure if | |
2883 | * its still present. | |
2884 | */ | |
2885 | ||
2886 | /* | |
2887 | * clean up the admin queue. Same thing as above. | |
2888 | * use blk_mq_tagset_busy_itr() and the transport routine to | |
2889 | * terminate the exchanges. | |
2890 | */ | |
44c6ec77 JS |
2891 | if (ctrl->ctrl.state != NVME_CTRL_NEW) |
2892 | blk_mq_quiesce_queue(ctrl->ctrl.admin_q); | |
61bff8ef JS |
2893 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, |
2894 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2895 | ||
2896 | /* kill the aens as they are a separate path */ | |
2897 | nvme_fc_abort_aen_ops(ctrl); | |
2898 | ||
2899 | /* wait for all io that had to be aborted */ | |
8a82dbf1 | 2900 | spin_lock_irq(&ctrl->lock); |
36715cf4 | 2901 | wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); |
61bff8ef | 2902 | ctrl->flags &= ~FCCTRL_TERMIO; |
8a82dbf1 | 2903 | spin_unlock_irq(&ctrl->lock); |
61bff8ef JS |
2904 | |
2905 | nvme_fc_term_aen_ops(ctrl); | |
2906 | ||
2907 | /* | |
2908 | * send a Disconnect(association) LS to fc-nvme target | |
2909 | * Note: could have been sent at top of process, but | |
2910 | * cleaner on link traffic if after the aborts complete. | |
2911 | * Note: if association doesn't exist, association_id will be 0 | |
2912 | */ | |
2913 | if (ctrl->association_id) | |
2914 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2915 | ||
2916 | if (ctrl->ctrl.tagset) { | |
2917 | nvme_fc_delete_hw_io_queues(ctrl); | |
2918 | nvme_fc_free_io_queues(ctrl); | |
2919 | } | |
2920 | ||
2921 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2922 | nvme_fc_free_queue(&ctrl->queues[0]); | |
158bfb88 | 2923 | |
d625d05e JS |
2924 | /* re-enable the admin_q so anything new can fast fail */ |
2925 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); | |
2926 | ||
158bfb88 | 2927 | nvme_fc_ctlr_inactive_on_rport(ctrl); |
61bff8ef JS |
2928 | } |
2929 | ||
2930 | static void | |
c5017e85 | 2931 | nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl) |
61bff8ef | 2932 | { |
c5017e85 | 2933 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); |
61bff8ef | 2934 | |
61bff8ef | 2935 | cancel_delayed_work_sync(&ctrl->connect_work); |
61bff8ef JS |
2936 | /* |
2937 | * kill the association on the link side. this will block | |
2938 | * waiting for io to terminate | |
2939 | */ | |
2940 | nvme_fc_delete_association(ctrl); | |
0fd997d3 JS |
2941 | |
2942 | /* resume the io queues so that things will fast fail */ | |
2943 | nvme_start_queues(nctrl); | |
61bff8ef JS |
2944 | } |
2945 | ||
5bbecdbc JS |
2946 | static void |
2947 | nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) | |
2948 | { | |
2b632970 JS |
2949 | struct nvme_fc_rport *rport = ctrl->rport; |
2950 | struct nvme_fc_remote_port *portptr = &rport->remoteport; | |
2951 | unsigned long recon_delay = ctrl->ctrl.opts->reconnect_delay * HZ; | |
2952 | bool recon = true; | |
5bbecdbc | 2953 | |
44c6ec77 | 2954 | if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) |
5bbecdbc | 2955 | return; |
5bbecdbc | 2956 | |
2b632970 | 2957 | if (portptr->port_state == FC_OBJSTATE_ONLINE) |
5bbecdbc | 2958 | dev_info(ctrl->ctrl.device, |
2b632970 JS |
2959 | "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", |
2960 | ctrl->cnum, status); | |
2961 | else if (time_after_eq(jiffies, rport->dev_loss_end)) | |
2962 | recon = false; | |
5bbecdbc | 2963 | |
2b632970 JS |
2964 | if (recon && nvmf_should_reconnect(&ctrl->ctrl)) { |
2965 | if (portptr->port_state == FC_OBJSTATE_ONLINE) | |
2966 | dev_info(ctrl->ctrl.device, | |
2967 | "NVME-FC{%d}: Reconnect attempt in %ld " | |
2968 | "seconds\n", | |
2969 | ctrl->cnum, recon_delay / HZ); | |
2970 | else if (time_after(jiffies + recon_delay, rport->dev_loss_end)) | |
2971 | recon_delay = rport->dev_loss_end - jiffies; | |
96e24801 | 2972 | |
2b632970 | 2973 | queue_delayed_work(nvme_wq, &ctrl->connect_work, recon_delay); |
5bbecdbc | 2974 | } else { |
2b632970 JS |
2975 | if (portptr->port_state == FC_OBJSTATE_ONLINE) |
2976 | dev_warn(ctrl->ctrl.device, | |
5bbecdbc JS |
2977 | "NVME-FC{%d}: Max reconnect attempts (%d) " |
2978 | "reached. Removing controller\n", | |
fdf9dfa8 | 2979 | ctrl->cnum, ctrl->ctrl.nr_reconnects); |
2b632970 JS |
2980 | else |
2981 | dev_warn(ctrl->ctrl.device, | |
2982 | "NVME-FC{%d}: dev_loss_tmo (%d) expired " | |
2983 | "while waiting for remoteport connectivity. " | |
2984 | "Removing controller\n", ctrl->cnum, | |
2985 | portptr->dev_loss_tmo); | |
c5017e85 | 2986 | WARN_ON(nvme_delete_ctrl(&ctrl->ctrl)); |
5bbecdbc JS |
2987 | } |
2988 | } | |
2989 | ||
61bff8ef JS |
2990 | static void |
2991 | nvme_fc_reset_ctrl_work(struct work_struct *work) | |
2992 | { | |
2993 | struct nvme_fc_ctrl *ctrl = | |
d86c4d8e | 2994 | container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); |
61bff8ef JS |
2995 | int ret; |
2996 | ||
d09f2b45 | 2997 | nvme_stop_ctrl(&ctrl->ctrl); |
44c6ec77 | 2998 | |
61bff8ef JS |
2999 | /* will block will waiting for io to terminate */ |
3000 | nvme_fc_delete_association(ctrl); | |
3001 | ||
44c6ec77 JS |
3002 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { |
3003 | dev_err(ctrl->ctrl.device, | |
3004 | "NVME-FC{%d}: error_recovery: Couldn't change state " | |
3005 | "to RECONNECTING\n", ctrl->cnum); | |
3006 | return; | |
3007 | } | |
3008 | ||
2b632970 | 3009 | if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) |
96e24801 | 3010 | ret = nvme_fc_create_association(ctrl); |
2b632970 JS |
3011 | else |
3012 | ret = -ENOTCONN; | |
3013 | ||
5bbecdbc JS |
3014 | if (ret) |
3015 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
3016 | else | |
61bff8ef | 3017 | dev_info(ctrl->ctrl.device, |
2b632970 JS |
3018 | "NVME-FC{%d}: controller reset complete\n", |
3019 | ctrl->cnum); | |
61bff8ef JS |
3020 | } |
3021 | ||
61bff8ef JS |
3022 | static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { |
3023 | .name = "fc", | |
3024 | .module = THIS_MODULE, | |
d3d5b87d | 3025 | .flags = NVME_F_FABRICS, |
61bff8ef JS |
3026 | .reg_read32 = nvmf_reg_read32, |
3027 | .reg_read64 = nvmf_reg_read64, | |
3028 | .reg_write32 = nvmf_reg_write32, | |
61bff8ef JS |
3029 | .free_ctrl = nvme_fc_nvme_ctrl_freed, |
3030 | .submit_async_event = nvme_fc_submit_async_event, | |
c5017e85 | 3031 | .delete_ctrl = nvme_fc_delete_ctrl, |
61bff8ef | 3032 | .get_address = nvmf_get_address, |
31b84460 | 3033 | .reinit_request = nvme_fc_reinit_request, |
61bff8ef JS |
3034 | }; |
3035 | ||
3036 | static void | |
3037 | nvme_fc_connect_ctrl_work(struct work_struct *work) | |
3038 | { | |
3039 | int ret; | |
3040 | ||
3041 | struct nvme_fc_ctrl *ctrl = | |
3042 | container_of(to_delayed_work(work), | |
3043 | struct nvme_fc_ctrl, connect_work); | |
3044 | ||
3045 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
3046 | if (ret) |
3047 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
3048 | else | |
61bff8ef JS |
3049 | dev_info(ctrl->ctrl.device, |
3050 | "NVME-FC{%d}: controller reconnect complete\n", | |
3051 | ctrl->cnum); | |
3052 | } | |
3053 | ||
3054 | ||
3055 | static const struct blk_mq_ops nvme_fc_admin_mq_ops = { | |
3056 | .queue_rq = nvme_fc_queue_rq, | |
3057 | .complete = nvme_fc_complete_rq, | |
76f983cb | 3058 | .init_request = nvme_fc_init_request, |
61bff8ef | 3059 | .exit_request = nvme_fc_exit_request, |
61bff8ef JS |
3060 | .init_hctx = nvme_fc_init_admin_hctx, |
3061 | .timeout = nvme_fc_timeout, | |
3062 | }; | |
3063 | ||
e399441d | 3064 | |
56d5f4f1 JS |
3065 | /* |
3066 | * Fails a controller request if it matches an existing controller | |
3067 | * (association) with the same tuple: | |
3068 | * <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN> | |
3069 | * | |
3070 | * The ports don't need to be compared as they are intrinsically | |
3071 | * already matched by the port pointers supplied. | |
3072 | */ | |
3073 | static bool | |
3074 | nvme_fc_existing_controller(struct nvme_fc_rport *rport, | |
3075 | struct nvmf_ctrl_options *opts) | |
3076 | { | |
3077 | struct nvme_fc_ctrl *ctrl; | |
3078 | unsigned long flags; | |
3079 | bool found = false; | |
3080 | ||
3081 | spin_lock_irqsave(&rport->lock, flags); | |
3082 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { | |
3083 | found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts); | |
3084 | if (found) | |
3085 | break; | |
3086 | } | |
3087 | spin_unlock_irqrestore(&rport->lock, flags); | |
3088 | ||
3089 | return found; | |
3090 | } | |
3091 | ||
e399441d | 3092 | static struct nvme_ctrl * |
61bff8ef | 3093 | nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, |
e399441d JS |
3094 | struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) |
3095 | { | |
3096 | struct nvme_fc_ctrl *ctrl; | |
3097 | unsigned long flags; | |
17c4dc6e | 3098 | int ret, idx, retry; |
e399441d | 3099 | |
85e6a6ad JS |
3100 | if (!(rport->remoteport.port_role & |
3101 | (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { | |
3102 | ret = -EBADR; | |
3103 | goto out_fail; | |
3104 | } | |
3105 | ||
56d5f4f1 JS |
3106 | if (!opts->duplicate_connect && |
3107 | nvme_fc_existing_controller(rport, opts)) { | |
3108 | ret = -EALREADY; | |
3109 | goto out_fail; | |
3110 | } | |
3111 | ||
e399441d JS |
3112 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
3113 | if (!ctrl) { | |
3114 | ret = -ENOMEM; | |
3115 | goto out_fail; | |
3116 | } | |
3117 | ||
3118 | idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); | |
3119 | if (idx < 0) { | |
3120 | ret = -ENOSPC; | |
3121 | goto out_free_ctrl; | |
3122 | } | |
3123 | ||
3124 | ctrl->ctrl.opts = opts; | |
3125 | INIT_LIST_HEAD(&ctrl->ctrl_list); | |
e399441d JS |
3126 | ctrl->lport = lport; |
3127 | ctrl->rport = rport; | |
3128 | ctrl->dev = lport->dev; | |
e399441d | 3129 | ctrl->cnum = idx; |
158bfb88 | 3130 | ctrl->assoc_active = false; |
8a82dbf1 | 3131 | init_waitqueue_head(&ctrl->ioabort_wait); |
e399441d | 3132 | |
e399441d JS |
3133 | get_device(ctrl->dev); |
3134 | kref_init(&ctrl->ref); | |
3135 | ||
d86c4d8e | 3136 | INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); |
61bff8ef | 3137 | INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); |
e399441d JS |
3138 | spin_lock_init(&ctrl->lock); |
3139 | ||
3140 | /* io queue count */ | |
d858e5f0 | 3141 | ctrl->ctrl.queue_count = min_t(unsigned int, |
e399441d JS |
3142 | opts->nr_io_queues, |
3143 | lport->ops->max_hw_queues); | |
d858e5f0 | 3144 | ctrl->ctrl.queue_count++; /* +1 for admin queue */ |
e399441d JS |
3145 | |
3146 | ctrl->ctrl.sqsize = opts->queue_size - 1; | |
3147 | ctrl->ctrl.kato = opts->kato; | |
3148 | ||
3149 | ret = -ENOMEM; | |
d858e5f0 SG |
3150 | ctrl->queues = kcalloc(ctrl->ctrl.queue_count, |
3151 | sizeof(struct nvme_fc_queue), GFP_KERNEL); | |
e399441d | 3152 | if (!ctrl->queues) |
61bff8ef | 3153 | goto out_free_ida; |
e399441d | 3154 | |
61bff8ef JS |
3155 | memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); |
3156 | ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; | |
38dabe21 | 3157 | ctrl->admin_tag_set.queue_depth = NVME_AQ_MQ_TAG_DEPTH; |
61bff8ef JS |
3158 | ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ |
3159 | ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; | |
3160 | ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
3161 | (SG_CHUNK_SIZE * | |
3162 | sizeof(struct scatterlist)) + | |
3163 | ctrl->lport->ops->fcprqst_priv_sz; | |
3164 | ctrl->admin_tag_set.driver_data = ctrl; | |
3165 | ctrl->admin_tag_set.nr_hw_queues = 1; | |
3166 | ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; | |
5a22e2bf | 3167 | ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED; |
e399441d | 3168 | |
61bff8ef | 3169 | ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); |
e399441d | 3170 | if (ret) |
61bff8ef | 3171 | goto out_free_queues; |
34b6c231 | 3172 | ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; |
e399441d | 3173 | |
61bff8ef JS |
3174 | ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); |
3175 | if (IS_ERR(ctrl->ctrl.admin_q)) { | |
3176 | ret = PTR_ERR(ctrl->ctrl.admin_q); | |
3177 | goto out_free_admin_tag_set; | |
e399441d JS |
3178 | } |
3179 | ||
61bff8ef JS |
3180 | /* |
3181 | * Would have been nice to init io queues tag set as well. | |
3182 | * However, we require interaction from the controller | |
3183 | * for max io queue count before we can do so. | |
3184 | * Defer this to the connect path. | |
3185 | */ | |
e399441d | 3186 | |
61bff8ef JS |
3187 | ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); |
3188 | if (ret) | |
3189 | goto out_cleanup_admin_q; | |
e399441d | 3190 | |
61bff8ef | 3191 | /* at this point, teardown path changes to ref counting on nvme ctrl */ |
e399441d JS |
3192 | |
3193 | spin_lock_irqsave(&rport->lock, flags); | |
3194 | list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); | |
3195 | spin_unlock_irqrestore(&rport->lock, flags); | |
3196 | ||
17c4dc6e JS |
3197 | /* |
3198 | * It's possible that transactions used to create the association | |
3199 | * may fail. Examples: CreateAssociation LS or CreateIOConnection | |
3200 | * LS gets dropped/corrupted/fails; or a frame gets dropped or a | |
3201 | * command times out for one of the actions to init the controller | |
3202 | * (Connect, Get/Set_Property, Set_Features, etc). Many of these | |
3203 | * transport errors (frame drop, LS failure) inherently must kill | |
3204 | * the association. The transport is coded so that any command used | |
3205 | * to create the association (prior to a LIVE state transition | |
3206 | * while NEW or RECONNECTING) will fail if it completes in error or | |
3207 | * times out. | |
3208 | * | |
3209 | * As such: as the connect request was mostly likely due to a | |
3210 | * udev event that discovered the remote port, meaning there is | |
3211 | * not an admin or script there to restart if the connect | |
3212 | * request fails, retry the initial connection creation up to | |
3213 | * three times before giving up and declaring failure. | |
3214 | */ | |
3215 | for (retry = 0; retry < 3; retry++) { | |
3216 | ret = nvme_fc_create_association(ctrl); | |
3217 | if (!ret) | |
3218 | break; | |
3219 | } | |
3220 | ||
61bff8ef | 3221 | if (ret) { |
17c4dc6e JS |
3222 | /* couldn't schedule retry - fail out */ |
3223 | dev_err(ctrl->ctrl.device, | |
3224 | "NVME-FC{%d}: Connect retry failed\n", ctrl->cnum); | |
3225 | ||
de41447a | 3226 | ctrl->ctrl.opts = NULL; |
17c4dc6e | 3227 | |
61bff8ef JS |
3228 | /* initiate nvme ctrl ref counting teardown */ |
3229 | nvme_uninit_ctrl(&ctrl->ctrl); | |
61bff8ef | 3230 | |
0b5a7669 JS |
3231 | /* Remove core ctrl ref. */ |
3232 | nvme_put_ctrl(&ctrl->ctrl); | |
3233 | ||
61bff8ef JS |
3234 | /* as we're past the point where we transition to the ref |
3235 | * counting teardown path, if we return a bad pointer here, | |
3236 | * the calling routine, thinking it's prior to the | |
3237 | * transition, will do an rport put. Since the teardown | |
3238 | * path also does a rport put, we do an extra get here to | |
3239 | * so proper order/teardown happens. | |
3240 | */ | |
3241 | nvme_fc_rport_get(rport); | |
3242 | ||
3243 | if (ret > 0) | |
3244 | ret = -EIO; | |
3245 | return ERR_PTR(ret); | |
e399441d JS |
3246 | } |
3247 | ||
d22524a4 | 3248 | nvme_get_ctrl(&ctrl->ctrl); |
2cb657bc | 3249 | |
61bff8ef JS |
3250 | dev_info(ctrl->ctrl.device, |
3251 | "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", | |
3252 | ctrl->cnum, ctrl->ctrl.opts->subsysnqn); | |
e399441d | 3253 | |
61bff8ef | 3254 | return &ctrl->ctrl; |
e399441d | 3255 | |
61bff8ef JS |
3256 | out_cleanup_admin_q: |
3257 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
3258 | out_free_admin_tag_set: | |
3259 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
3260 | out_free_queues: | |
3261 | kfree(ctrl->queues); | |
e399441d | 3262 | out_free_ida: |
61bff8ef | 3263 | put_device(ctrl->dev); |
e399441d JS |
3264 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
3265 | out_free_ctrl: | |
3266 | kfree(ctrl); | |
3267 | out_fail: | |
e399441d JS |
3268 | /* exit via here doesn't follow ctlr ref points */ |
3269 | return ERR_PTR(ret); | |
3270 | } | |
3271 | ||
e399441d JS |
3272 | |
3273 | struct nvmet_fc_traddr { | |
3274 | u64 nn; | |
3275 | u64 pn; | |
3276 | }; | |
3277 | ||
e399441d | 3278 | static int |
9c5358e1 | 3279 | __nvme_fc_parse_u64(substring_t *sstr, u64 *val) |
e399441d | 3280 | { |
e399441d JS |
3281 | u64 token64; |
3282 | ||
9c5358e1 JS |
3283 | if (match_u64(sstr, &token64)) |
3284 | return -EINVAL; | |
3285 | *val = token64; | |
e399441d | 3286 | |
9c5358e1 JS |
3287 | return 0; |
3288 | } | |
e399441d | 3289 | |
9c5358e1 JS |
3290 | /* |
3291 | * This routine validates and extracts the WWN's from the TRADDR string. | |
3292 | * As kernel parsers need the 0x to determine number base, universally | |
3293 | * build string to parse with 0x prefix before parsing name strings. | |
3294 | */ | |
3295 | static int | |
3296 | nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) | |
3297 | { | |
3298 | char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; | |
3299 | substring_t wwn = { name, &name[sizeof(name)-1] }; | |
3300 | int nnoffset, pnoffset; | |
3301 | ||
3302 | /* validate it string one of the 2 allowed formats */ | |
3303 | if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && | |
3304 | !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && | |
3305 | !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], | |
3306 | "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { | |
3307 | nnoffset = NVME_FC_TRADDR_OXNNLEN; | |
3308 | pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + | |
3309 | NVME_FC_TRADDR_OXNNLEN; | |
3310 | } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && | |
3311 | !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && | |
3312 | !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], | |
3313 | "pn-", NVME_FC_TRADDR_NNLEN))) { | |
3314 | nnoffset = NVME_FC_TRADDR_NNLEN; | |
3315 | pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; | |
3316 | } else | |
3317 | goto out_einval; | |
e399441d | 3318 | |
9c5358e1 JS |
3319 | name[0] = '0'; |
3320 | name[1] = 'x'; | |
3321 | name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; | |
3322 | ||
3323 | memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
3324 | if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) | |
3325 | goto out_einval; | |
3326 | ||
3327 | memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
3328 | if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) | |
3329 | goto out_einval; | |
3330 | ||
3331 | return 0; | |
3332 | ||
3333 | out_einval: | |
3334 | pr_warn("%s: bad traddr string\n", __func__); | |
3335 | return -EINVAL; | |
e399441d JS |
3336 | } |
3337 | ||
3338 | static struct nvme_ctrl * | |
3339 | nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) | |
3340 | { | |
3341 | struct nvme_fc_lport *lport; | |
3342 | struct nvme_fc_rport *rport; | |
61bff8ef | 3343 | struct nvme_ctrl *ctrl; |
e399441d JS |
3344 | struct nvmet_fc_traddr laddr = { 0L, 0L }; |
3345 | struct nvmet_fc_traddr raddr = { 0L, 0L }; | |
3346 | unsigned long flags; | |
3347 | int ret; | |
3348 | ||
9c5358e1 | 3349 | ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3350 | if (ret || !raddr.nn || !raddr.pn) |
3351 | return ERR_PTR(-EINVAL); | |
3352 | ||
9c5358e1 | 3353 | ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3354 | if (ret || !laddr.nn || !laddr.pn) |
3355 | return ERR_PTR(-EINVAL); | |
3356 | ||
3357 | /* find the host and remote ports to connect together */ | |
3358 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
3359 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
3360 | if (lport->localport.node_name != laddr.nn || | |
3361 | lport->localport.port_name != laddr.pn) | |
3362 | continue; | |
3363 | ||
3364 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
3365 | if (rport->remoteport.node_name != raddr.nn || | |
3366 | rport->remoteport.port_name != raddr.pn) | |
3367 | continue; | |
3368 | ||
3369 | /* if fail to get reference fall through. Will error */ | |
3370 | if (!nvme_fc_rport_get(rport)) | |
3371 | break; | |
3372 | ||
3373 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3374 | ||
61bff8ef JS |
3375 | ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); |
3376 | if (IS_ERR(ctrl)) | |
3377 | nvme_fc_rport_put(rport); | |
3378 | return ctrl; | |
e399441d JS |
3379 | } |
3380 | } | |
3381 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3382 | ||
3383 | return ERR_PTR(-ENOENT); | |
3384 | } | |
3385 | ||
3386 | ||
3387 | static struct nvmf_transport_ops nvme_fc_transport = { | |
3388 | .name = "fc", | |
0de5cd36 | 3389 | .module = THIS_MODULE, |
e399441d | 3390 | .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, |
5bbecdbc | 3391 | .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, |
e399441d JS |
3392 | .create_ctrl = nvme_fc_create_ctrl, |
3393 | }; | |
3394 | ||
3395 | static int __init nvme_fc_init_module(void) | |
3396 | { | |
5f568556 JS |
3397 | int ret; |
3398 | ||
3399 | /* | |
3400 | * NOTE: | |
3401 | * It is expected that in the future the kernel will combine | |
3402 | * the FC-isms that are currently under scsi and now being | |
3403 | * added to by NVME into a new standalone FC class. The SCSI | |
3404 | * and NVME protocols and their devices would be under this | |
3405 | * new FC class. | |
3406 | * | |
3407 | * As we need something to post FC-specific udev events to, | |
3408 | * specifically for nvme probe events, start by creating the | |
3409 | * new device class. When the new standalone FC class is | |
3410 | * put in place, this code will move to a more generic | |
3411 | * location for the class. | |
3412 | */ | |
3413 | fc_class = class_create(THIS_MODULE, "fc"); | |
3414 | if (IS_ERR(fc_class)) { | |
3415 | pr_err("couldn't register class fc\n"); | |
3416 | return PTR_ERR(fc_class); | |
3417 | } | |
3418 | ||
3419 | /* | |
3420 | * Create a device for the FC-centric udev events | |
3421 | */ | |
3422 | fc_udev_device = device_create(fc_class, NULL, MKDEV(0, 0), NULL, | |
3423 | "fc_udev_device"); | |
3424 | if (IS_ERR(fc_udev_device)) { | |
3425 | pr_err("couldn't create fc_udev device!\n"); | |
3426 | ret = PTR_ERR(fc_udev_device); | |
3427 | goto out_destroy_class; | |
3428 | } | |
3429 | ||
3430 | ret = nvmf_register_transport(&nvme_fc_transport); | |
3431 | if (ret) | |
3432 | goto out_destroy_device; | |
3433 | ||
3434 | return 0; | |
3435 | ||
3436 | out_destroy_device: | |
3437 | device_destroy(fc_class, MKDEV(0, 0)); | |
3438 | out_destroy_class: | |
3439 | class_destroy(fc_class); | |
3440 | return ret; | |
e399441d JS |
3441 | } |
3442 | ||
3443 | static void __exit nvme_fc_exit_module(void) | |
3444 | { | |
3445 | /* sanity check - all lports should be removed */ | |
3446 | if (!list_empty(&nvme_fc_lport_list)) | |
3447 | pr_warn("%s: localport list not empty\n", __func__); | |
3448 | ||
3449 | nvmf_unregister_transport(&nvme_fc_transport); | |
3450 | ||
e399441d JS |
3451 | ida_destroy(&nvme_fc_local_port_cnt); |
3452 | ida_destroy(&nvme_fc_ctrl_cnt); | |
5f568556 JS |
3453 | |
3454 | device_destroy(fc_class, MKDEV(0, 0)); | |
3455 | class_destroy(fc_class); | |
e399441d JS |
3456 | } |
3457 | ||
3458 | module_init(nvme_fc_init_module); | |
3459 | module_exit(nvme_fc_exit_module); | |
3460 | ||
3461 | MODULE_LICENSE("GPL v2"); |