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e399441d JS |
1 | /* |
2 | * Copyright (c) 2016 Avago Technologies. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful. | |
9 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
10 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
11 | * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO | |
12 | * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. | |
13 | * See the GNU General Public License for more details, a copy of which | |
14 | * can be found in the file COPYING included with this package | |
15 | * | |
16 | */ | |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
18 | #include <linux/module.h> | |
19 | #include <linux/parser.h> | |
20 | #include <uapi/scsi/fc/fc_fs.h> | |
21 | #include <uapi/scsi/fc/fc_els.h> | |
61bff8ef | 22 | #include <linux/delay.h> |
e399441d JS |
23 | |
24 | #include "nvme.h" | |
25 | #include "fabrics.h" | |
26 | #include <linux/nvme-fc-driver.h> | |
27 | #include <linux/nvme-fc.h> | |
28 | ||
29 | ||
30 | /* *************************** Data Structures/Defines ****************** */ | |
31 | ||
32 | ||
33 | /* | |
34 | * We handle AEN commands ourselves and don't even let the | |
35 | * block layer know about them. | |
36 | */ | |
37 | #define NVME_FC_NR_AEN_COMMANDS 1 | |
38 | #define NVME_FC_AQ_BLKMQ_DEPTH \ | |
7aa1f427 | 39 | (NVME_AQ_DEPTH - NVME_FC_NR_AEN_COMMANDS) |
e399441d JS |
40 | #define AEN_CMDID_BASE (NVME_FC_AQ_BLKMQ_DEPTH + 1) |
41 | ||
42 | enum nvme_fc_queue_flags { | |
43 | NVME_FC_Q_CONNECTED = (1 << 0), | |
44 | }; | |
45 | ||
46 | #define NVMEFC_QUEUE_DELAY 3 /* ms units */ | |
47 | ||
48 | struct nvme_fc_queue { | |
49 | struct nvme_fc_ctrl *ctrl; | |
50 | struct device *dev; | |
51 | struct blk_mq_hw_ctx *hctx; | |
52 | void *lldd_handle; | |
53 | int queue_size; | |
54 | size_t cmnd_capsule_len; | |
55 | u32 qnum; | |
56 | u32 rqcnt; | |
57 | u32 seqno; | |
58 | ||
59 | u64 connection_id; | |
60 | atomic_t csn; | |
61 | ||
62 | unsigned long flags; | |
63 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
64 | ||
8d64daf7 JS |
65 | enum nvme_fcop_flags { |
66 | FCOP_FLAGS_TERMIO = (1 << 0), | |
67 | FCOP_FLAGS_RELEASED = (1 << 1), | |
68 | FCOP_FLAGS_COMPLETE = (1 << 2), | |
78a7ac26 | 69 | FCOP_FLAGS_AEN = (1 << 3), |
8d64daf7 JS |
70 | }; |
71 | ||
e399441d JS |
72 | struct nvmefc_ls_req_op { |
73 | struct nvmefc_ls_req ls_req; | |
74 | ||
c913a8b0 | 75 | struct nvme_fc_rport *rport; |
e399441d JS |
76 | struct nvme_fc_queue *queue; |
77 | struct request *rq; | |
8d64daf7 | 78 | u32 flags; |
e399441d JS |
79 | |
80 | int ls_error; | |
81 | struct completion ls_done; | |
c913a8b0 | 82 | struct list_head lsreq_list; /* rport->ls_req_list */ |
e399441d JS |
83 | bool req_queued; |
84 | }; | |
85 | ||
86 | enum nvme_fcpop_state { | |
87 | FCPOP_STATE_UNINIT = 0, | |
88 | FCPOP_STATE_IDLE = 1, | |
89 | FCPOP_STATE_ACTIVE = 2, | |
90 | FCPOP_STATE_ABORTED = 3, | |
78a7ac26 | 91 | FCPOP_STATE_COMPLETE = 4, |
e399441d JS |
92 | }; |
93 | ||
94 | struct nvme_fc_fcp_op { | |
95 | struct nvme_request nreq; /* | |
96 | * nvme/host/core.c | |
97 | * requires this to be | |
98 | * the 1st element in the | |
99 | * private structure | |
100 | * associated with the | |
101 | * request. | |
102 | */ | |
103 | struct nvmefc_fcp_req fcp_req; | |
104 | ||
105 | struct nvme_fc_ctrl *ctrl; | |
106 | struct nvme_fc_queue *queue; | |
107 | struct request *rq; | |
108 | ||
109 | atomic_t state; | |
78a7ac26 | 110 | u32 flags; |
e399441d JS |
111 | u32 rqno; |
112 | u32 nents; | |
113 | ||
114 | struct nvme_fc_cmd_iu cmd_iu; | |
115 | struct nvme_fc_ersp_iu rsp_iu; | |
116 | }; | |
117 | ||
118 | struct nvme_fc_lport { | |
119 | struct nvme_fc_local_port localport; | |
120 | ||
121 | struct ida endp_cnt; | |
122 | struct list_head port_list; /* nvme_fc_port_list */ | |
123 | struct list_head endp_list; | |
124 | struct device *dev; /* physical device for dma */ | |
125 | struct nvme_fc_port_template *ops; | |
126 | struct kref ref; | |
127 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
128 | ||
129 | struct nvme_fc_rport { | |
130 | struct nvme_fc_remote_port remoteport; | |
131 | ||
132 | struct list_head endp_list; /* for lport->endp_list */ | |
133 | struct list_head ctrl_list; | |
c913a8b0 JS |
134 | struct list_head ls_req_list; |
135 | struct device *dev; /* physical device for dma */ | |
136 | struct nvme_fc_lport *lport; | |
e399441d JS |
137 | spinlock_t lock; |
138 | struct kref ref; | |
139 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
140 | ||
61bff8ef JS |
141 | enum nvme_fcctrl_flags { |
142 | FCCTRL_TERMIO = (1 << 0), | |
e399441d JS |
143 | }; |
144 | ||
145 | struct nvme_fc_ctrl { | |
146 | spinlock_t lock; | |
147 | struct nvme_fc_queue *queues; | |
e399441d JS |
148 | struct device *dev; |
149 | struct nvme_fc_lport *lport; | |
150 | struct nvme_fc_rport *rport; | |
151 | u32 cnum; | |
152 | ||
153 | u64 association_id; | |
154 | ||
e399441d | 155 | struct list_head ctrl_list; /* rport->ctrl_list */ |
e399441d JS |
156 | |
157 | struct blk_mq_tag_set admin_tag_set; | |
158 | struct blk_mq_tag_set tag_set; | |
159 | ||
160 | struct work_struct delete_work; | |
61bff8ef | 161 | struct delayed_work connect_work; |
61bff8ef | 162 | |
e399441d | 163 | struct kref ref; |
61bff8ef JS |
164 | u32 flags; |
165 | u32 iocnt; | |
36715cf4 | 166 | wait_queue_head_t ioabort_wait; |
e399441d JS |
167 | |
168 | struct nvme_fc_fcp_op aen_ops[NVME_FC_NR_AEN_COMMANDS]; | |
169 | ||
170 | struct nvme_ctrl ctrl; | |
171 | }; | |
172 | ||
173 | static inline struct nvme_fc_ctrl * | |
174 | to_fc_ctrl(struct nvme_ctrl *ctrl) | |
175 | { | |
176 | return container_of(ctrl, struct nvme_fc_ctrl, ctrl); | |
177 | } | |
178 | ||
179 | static inline struct nvme_fc_lport * | |
180 | localport_to_lport(struct nvme_fc_local_port *portptr) | |
181 | { | |
182 | return container_of(portptr, struct nvme_fc_lport, localport); | |
183 | } | |
184 | ||
185 | static inline struct nvme_fc_rport * | |
186 | remoteport_to_rport(struct nvme_fc_remote_port *portptr) | |
187 | { | |
188 | return container_of(portptr, struct nvme_fc_rport, remoteport); | |
189 | } | |
190 | ||
191 | static inline struct nvmefc_ls_req_op * | |
192 | ls_req_to_lsop(struct nvmefc_ls_req *lsreq) | |
193 | { | |
194 | return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); | |
195 | } | |
196 | ||
197 | static inline struct nvme_fc_fcp_op * | |
198 | fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) | |
199 | { | |
200 | return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); | |
201 | } | |
202 | ||
203 | ||
204 | ||
205 | /* *************************** Globals **************************** */ | |
206 | ||
207 | ||
208 | static DEFINE_SPINLOCK(nvme_fc_lock); | |
209 | ||
210 | static LIST_HEAD(nvme_fc_lport_list); | |
211 | static DEFINE_IDA(nvme_fc_local_port_cnt); | |
212 | static DEFINE_IDA(nvme_fc_ctrl_cnt); | |
213 | ||
e399441d JS |
214 | |
215 | ||
5f568556 JS |
216 | /* |
217 | * These items are short-term. They will eventually be moved into | |
218 | * a generic FC class. See comments in module init. | |
219 | */ | |
220 | static struct class *fc_class; | |
221 | static struct device *fc_udev_device; | |
222 | ||
e399441d JS |
223 | |
224 | /* *********************** FC-NVME Port Management ************************ */ | |
225 | ||
226 | static int __nvme_fc_del_ctrl(struct nvme_fc_ctrl *); | |
227 | static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, | |
228 | struct nvme_fc_queue *, unsigned int); | |
229 | ||
5533d424 JS |
230 | static void |
231 | nvme_fc_free_lport(struct kref *ref) | |
232 | { | |
233 | struct nvme_fc_lport *lport = | |
234 | container_of(ref, struct nvme_fc_lport, ref); | |
235 | unsigned long flags; | |
236 | ||
237 | WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); | |
238 | WARN_ON(!list_empty(&lport->endp_list)); | |
239 | ||
240 | /* remove from transport list */ | |
241 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
242 | list_del(&lport->port_list); | |
243 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
244 | ||
245 | /* let the LLDD know we've finished tearing it down */ | |
246 | lport->ops->localport_delete(&lport->localport); | |
247 | ||
248 | ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); | |
249 | ida_destroy(&lport->endp_cnt); | |
250 | ||
251 | put_device(lport->dev); | |
252 | ||
253 | kfree(lport); | |
254 | } | |
255 | ||
256 | static void | |
257 | nvme_fc_lport_put(struct nvme_fc_lport *lport) | |
258 | { | |
259 | kref_put(&lport->ref, nvme_fc_free_lport); | |
260 | } | |
261 | ||
262 | static int | |
263 | nvme_fc_lport_get(struct nvme_fc_lport *lport) | |
264 | { | |
265 | return kref_get_unless_zero(&lport->ref); | |
266 | } | |
267 | ||
268 | ||
269 | static struct nvme_fc_lport * | |
270 | nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo) | |
271 | { | |
272 | struct nvme_fc_lport *lport; | |
273 | unsigned long flags; | |
274 | ||
275 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
276 | ||
277 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
278 | if (lport->localport.node_name != pinfo->node_name || | |
279 | lport->localport.port_name != pinfo->port_name) | |
280 | continue; | |
281 | ||
282 | if (lport->localport.port_state != FC_OBJSTATE_DELETED) { | |
283 | lport = ERR_PTR(-EEXIST); | |
284 | goto out_done; | |
285 | } | |
286 | ||
287 | if (!nvme_fc_lport_get(lport)) { | |
288 | /* | |
289 | * fails if ref cnt already 0. If so, | |
290 | * act as if lport already deleted | |
291 | */ | |
292 | lport = NULL; | |
293 | goto out_done; | |
294 | } | |
295 | ||
296 | /* resume the lport */ | |
297 | ||
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 | */ | |
358 | newrec = nvme_fc_attach_to_unreg_lport(pinfo); | |
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); | |
394 | newrec->ops = template; | |
395 | newrec->dev = dev; | |
396 | ida_init(&newrec->endp_cnt); | |
397 | newrec->localport.private = &newrec[1]; | |
398 | newrec->localport.node_name = pinfo->node_name; | |
399 | newrec->localport.port_name = pinfo->port_name; | |
400 | newrec->localport.port_role = pinfo->port_role; | |
401 | newrec->localport.port_id = pinfo->port_id; | |
402 | newrec->localport.port_state = FC_OBJSTATE_ONLINE; | |
403 | newrec->localport.port_num = idx; | |
404 | ||
405 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
406 | list_add_tail(&newrec->port_list, &nvme_fc_lport_list); | |
407 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
408 | ||
409 | if (dev) | |
410 | dma_set_seg_boundary(dev, template->dma_boundary); | |
411 | ||
412 | *portptr = &newrec->localport; | |
413 | return 0; | |
414 | ||
415 | out_ida_put: | |
416 | ida_simple_remove(&nvme_fc_local_port_cnt, idx); | |
417 | out_fail_kfree: | |
418 | kfree(newrec); | |
419 | out_reghost_failed: | |
420 | *portptr = NULL; | |
421 | ||
422 | return ret; | |
423 | } | |
424 | EXPORT_SYMBOL_GPL(nvme_fc_register_localport); | |
425 | ||
e399441d JS |
426 | /** |
427 | * nvme_fc_unregister_localport - transport entry point called by an | |
428 | * LLDD to deregister/remove a previously | |
429 | * registered a NVME host FC port. | |
430 | * @localport: pointer to the (registered) local port that is to be | |
431 | * deregistered. | |
432 | * | |
433 | * Returns: | |
434 | * a completion status. Must be 0 upon success; a negative errno | |
435 | * (ex: -ENXIO) upon failure. | |
436 | */ | |
437 | int | |
438 | nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) | |
439 | { | |
440 | struct nvme_fc_lport *lport = localport_to_lport(portptr); | |
441 | unsigned long flags; | |
442 | ||
443 | if (!portptr) | |
444 | return -EINVAL; | |
445 | ||
446 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
447 | ||
448 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
449 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
450 | return -EINVAL; | |
451 | } | |
452 | portptr->port_state = FC_OBJSTATE_DELETED; | |
453 | ||
454 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
455 | ||
456 | nvme_fc_lport_put(lport); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); | |
461 | ||
eaefd5ab JS |
462 | /* |
463 | * TRADDR strings, per FC-NVME are fixed format: | |
464 | * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters | |
465 | * udev event will only differ by prefix of what field is | |
466 | * being specified: | |
467 | * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters | |
468 | * 19 + 43 + null_fudge = 64 characters | |
469 | */ | |
470 | #define FCNVME_TRADDR_LENGTH 64 | |
471 | ||
472 | static void | |
473 | nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, | |
474 | struct nvme_fc_rport *rport) | |
475 | { | |
476 | char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ | |
477 | char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ | |
478 | char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; | |
479 | ||
480 | if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) | |
481 | return; | |
482 | ||
483 | snprintf(hostaddr, sizeof(hostaddr), | |
484 | "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
485 | lport->localport.node_name, lport->localport.port_name); | |
486 | snprintf(tgtaddr, sizeof(tgtaddr), | |
487 | "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
488 | rport->remoteport.node_name, rport->remoteport.port_name); | |
489 | kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); | |
490 | } | |
491 | ||
469d0ef0 JS |
492 | static void |
493 | nvme_fc_free_rport(struct kref *ref) | |
494 | { | |
495 | struct nvme_fc_rport *rport = | |
496 | container_of(ref, struct nvme_fc_rport, ref); | |
497 | struct nvme_fc_lport *lport = | |
498 | localport_to_lport(rport->remoteport.localport); | |
499 | unsigned long flags; | |
500 | ||
501 | WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); | |
502 | WARN_ON(!list_empty(&rport->ctrl_list)); | |
503 | ||
504 | /* remove from lport list */ | |
505 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
506 | list_del(&rport->endp_list); | |
507 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
508 | ||
509 | /* let the LLDD know we've finished tearing it down */ | |
510 | lport->ops->remoteport_delete(&rport->remoteport); | |
511 | ||
512 | ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); | |
513 | ||
514 | kfree(rport); | |
515 | ||
516 | nvme_fc_lport_put(lport); | |
517 | } | |
518 | ||
519 | static void | |
520 | nvme_fc_rport_put(struct nvme_fc_rport *rport) | |
521 | { | |
522 | kref_put(&rport->ref, nvme_fc_free_rport); | |
523 | } | |
524 | ||
525 | static int | |
526 | nvme_fc_rport_get(struct nvme_fc_rport *rport) | |
527 | { | |
528 | return kref_get_unless_zero(&rport->ref); | |
529 | } | |
530 | ||
e399441d JS |
531 | /** |
532 | * nvme_fc_register_remoteport - transport entry point called by an | |
533 | * LLDD to register the existence of a NVME | |
534 | * subsystem FC port on its fabric. | |
535 | * @localport: pointer to the (registered) local port that the remote | |
536 | * subsystem port is connected to. | |
537 | * @pinfo: pointer to information about the port to be registered | |
538 | * @rport_p: pointer to a remote port pointer. Upon success, the routine | |
539 | * will allocate a nvme_fc_remote_port structure and place its | |
540 | * address in the remote port pointer. Upon failure, remote port | |
541 | * pointer will be set to 0. | |
542 | * | |
543 | * Returns: | |
544 | * a completion status. Must be 0 upon success; a negative errno | |
545 | * (ex: -ENXIO) upon failure. | |
546 | */ | |
547 | int | |
548 | nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, | |
549 | struct nvme_fc_port_info *pinfo, | |
550 | struct nvme_fc_remote_port **portptr) | |
551 | { | |
552 | struct nvme_fc_lport *lport = localport_to_lport(localport); | |
553 | struct nvme_fc_rport *newrec; | |
554 | unsigned long flags; | |
555 | int ret, idx; | |
556 | ||
557 | newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), | |
558 | GFP_KERNEL); | |
559 | if (!newrec) { | |
560 | ret = -ENOMEM; | |
561 | goto out_reghost_failed; | |
562 | } | |
563 | ||
564 | if (!nvme_fc_lport_get(lport)) { | |
565 | ret = -ESHUTDOWN; | |
566 | goto out_kfree_rport; | |
567 | } | |
568 | ||
569 | idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); | |
570 | if (idx < 0) { | |
571 | ret = -ENOSPC; | |
572 | goto out_lport_put; | |
573 | } | |
574 | ||
575 | INIT_LIST_HEAD(&newrec->endp_list); | |
576 | INIT_LIST_HEAD(&newrec->ctrl_list); | |
c913a8b0 | 577 | INIT_LIST_HEAD(&newrec->ls_req_list); |
e399441d JS |
578 | kref_init(&newrec->ref); |
579 | spin_lock_init(&newrec->lock); | |
580 | newrec->remoteport.localport = &lport->localport; | |
c913a8b0 JS |
581 | newrec->dev = lport->dev; |
582 | newrec->lport = lport; | |
e399441d JS |
583 | newrec->remoteport.private = &newrec[1]; |
584 | newrec->remoteport.port_role = pinfo->port_role; | |
585 | newrec->remoteport.node_name = pinfo->node_name; | |
586 | newrec->remoteport.port_name = pinfo->port_name; | |
587 | newrec->remoteport.port_id = pinfo->port_id; | |
588 | newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; | |
589 | newrec->remoteport.port_num = idx; | |
590 | ||
591 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
592 | list_add_tail(&newrec->endp_list, &lport->endp_list); | |
593 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
594 | ||
eaefd5ab JS |
595 | nvme_fc_signal_discovery_scan(lport, newrec); |
596 | ||
e399441d JS |
597 | *portptr = &newrec->remoteport; |
598 | return 0; | |
599 | ||
600 | out_lport_put: | |
601 | nvme_fc_lport_put(lport); | |
602 | out_kfree_rport: | |
603 | kfree(newrec); | |
604 | out_reghost_failed: | |
605 | *portptr = NULL; | |
606 | return ret; | |
e399441d JS |
607 | } |
608 | EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); | |
609 | ||
8d64daf7 JS |
610 | static int |
611 | nvme_fc_abort_lsops(struct nvme_fc_rport *rport) | |
612 | { | |
613 | struct nvmefc_ls_req_op *lsop; | |
614 | unsigned long flags; | |
615 | ||
616 | restart: | |
617 | spin_lock_irqsave(&rport->lock, flags); | |
618 | ||
619 | list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { | |
620 | if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { | |
621 | lsop->flags |= FCOP_FLAGS_TERMIO; | |
622 | spin_unlock_irqrestore(&rport->lock, flags); | |
623 | rport->lport->ops->ls_abort(&rport->lport->localport, | |
624 | &rport->remoteport, | |
625 | &lsop->ls_req); | |
626 | goto restart; | |
627 | } | |
628 | } | |
629 | spin_unlock_irqrestore(&rport->lock, flags); | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
e399441d JS |
634 | /** |
635 | * nvme_fc_unregister_remoteport - transport entry point called by an | |
636 | * LLDD to deregister/remove a previously | |
637 | * registered a NVME subsystem FC port. | |
638 | * @remoteport: pointer to the (registered) remote port that is to be | |
639 | * deregistered. | |
640 | * | |
641 | * Returns: | |
642 | * a completion status. Must be 0 upon success; a negative errno | |
643 | * (ex: -ENXIO) upon failure. | |
644 | */ | |
645 | int | |
646 | nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) | |
647 | { | |
648 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
649 | struct nvme_fc_ctrl *ctrl; | |
650 | unsigned long flags; | |
651 | ||
652 | if (!portptr) | |
653 | return -EINVAL; | |
654 | ||
655 | spin_lock_irqsave(&rport->lock, flags); | |
656 | ||
657 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
658 | spin_unlock_irqrestore(&rport->lock, flags); | |
659 | return -EINVAL; | |
660 | } | |
661 | portptr->port_state = FC_OBJSTATE_DELETED; | |
662 | ||
663 | /* tear down all associations to the remote port */ | |
664 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) | |
665 | __nvme_fc_del_ctrl(ctrl); | |
666 | ||
667 | spin_unlock_irqrestore(&rport->lock, flags); | |
668 | ||
8d64daf7 JS |
669 | nvme_fc_abort_lsops(rport); |
670 | ||
e399441d JS |
671 | nvme_fc_rport_put(rport); |
672 | return 0; | |
673 | } | |
674 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); | |
675 | ||
eaefd5ab JS |
676 | /** |
677 | * nvme_fc_rescan_remoteport - transport entry point called by an | |
678 | * LLDD to request a nvme device rescan. | |
679 | * @remoteport: pointer to the (registered) remote port that is to be | |
680 | * rescanned. | |
681 | * | |
682 | * Returns: N/A | |
683 | */ | |
684 | void | |
685 | nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) | |
686 | { | |
687 | struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); | |
688 | ||
689 | nvme_fc_signal_discovery_scan(rport->lport, rport); | |
690 | } | |
691 | EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); | |
692 | ||
e399441d JS |
693 | |
694 | /* *********************** FC-NVME DMA Handling **************************** */ | |
695 | ||
696 | /* | |
697 | * The fcloop device passes in a NULL device pointer. Real LLD's will | |
698 | * pass in a valid device pointer. If NULL is passed to the dma mapping | |
699 | * routines, depending on the platform, it may or may not succeed, and | |
700 | * may crash. | |
701 | * | |
702 | * As such: | |
703 | * Wrapper all the dma routines and check the dev pointer. | |
704 | * | |
705 | * If simple mappings (return just a dma address, we'll noop them, | |
706 | * returning a dma address of 0. | |
707 | * | |
708 | * On more complex mappings (dma_map_sg), a pseudo routine fills | |
709 | * in the scatter list, setting all dma addresses to 0. | |
710 | */ | |
711 | ||
712 | static inline dma_addr_t | |
713 | fc_dma_map_single(struct device *dev, void *ptr, size_t size, | |
714 | enum dma_data_direction dir) | |
715 | { | |
716 | return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; | |
717 | } | |
718 | ||
719 | static inline int | |
720 | fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
721 | { | |
722 | return dev ? dma_mapping_error(dev, dma_addr) : 0; | |
723 | } | |
724 | ||
725 | static inline void | |
726 | fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
727 | enum dma_data_direction dir) | |
728 | { | |
729 | if (dev) | |
730 | dma_unmap_single(dev, addr, size, dir); | |
731 | } | |
732 | ||
733 | static inline void | |
734 | fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, | |
735 | enum dma_data_direction dir) | |
736 | { | |
737 | if (dev) | |
738 | dma_sync_single_for_cpu(dev, addr, size, dir); | |
739 | } | |
740 | ||
741 | static inline void | |
742 | fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, | |
743 | enum dma_data_direction dir) | |
744 | { | |
745 | if (dev) | |
746 | dma_sync_single_for_device(dev, addr, size, dir); | |
747 | } | |
748 | ||
749 | /* pseudo dma_map_sg call */ | |
750 | static int | |
751 | fc_map_sg(struct scatterlist *sg, int nents) | |
752 | { | |
753 | struct scatterlist *s; | |
754 | int i; | |
755 | ||
756 | WARN_ON(nents == 0 || sg[0].length == 0); | |
757 | ||
758 | for_each_sg(sg, s, nents, i) { | |
759 | s->dma_address = 0L; | |
760 | #ifdef CONFIG_NEED_SG_DMA_LENGTH | |
761 | s->dma_length = s->length; | |
762 | #endif | |
763 | } | |
764 | return nents; | |
765 | } | |
766 | ||
767 | static inline int | |
768 | fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
769 | enum dma_data_direction dir) | |
770 | { | |
771 | return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); | |
772 | } | |
773 | ||
774 | static inline void | |
775 | fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, | |
776 | enum dma_data_direction dir) | |
777 | { | |
778 | if (dev) | |
779 | dma_unmap_sg(dev, sg, nents, dir); | |
780 | } | |
781 | ||
782 | ||
783 | /* *********************** FC-NVME LS Handling **************************** */ | |
784 | ||
785 | static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); | |
786 | static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); | |
787 | ||
788 | ||
789 | static void | |
c913a8b0 | 790 | __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) |
e399441d | 791 | { |
c913a8b0 | 792 | struct nvme_fc_rport *rport = lsop->rport; |
e399441d JS |
793 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; |
794 | unsigned long flags; | |
795 | ||
c913a8b0 | 796 | spin_lock_irqsave(&rport->lock, flags); |
e399441d JS |
797 | |
798 | if (!lsop->req_queued) { | |
c913a8b0 | 799 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d JS |
800 | return; |
801 | } | |
802 | ||
803 | list_del(&lsop->lsreq_list); | |
804 | ||
805 | lsop->req_queued = false; | |
806 | ||
c913a8b0 | 807 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 808 | |
c913a8b0 | 809 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, |
e399441d JS |
810 | (lsreq->rqstlen + lsreq->rsplen), |
811 | DMA_BIDIRECTIONAL); | |
812 | ||
c913a8b0 | 813 | nvme_fc_rport_put(rport); |
e399441d JS |
814 | } |
815 | ||
816 | static int | |
c913a8b0 | 817 | __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, |
e399441d JS |
818 | struct nvmefc_ls_req_op *lsop, |
819 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
820 | { | |
821 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
822 | unsigned long flags; | |
c913a8b0 | 823 | int ret = 0; |
e399441d | 824 | |
c913a8b0 JS |
825 | if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
826 | return -ECONNREFUSED; | |
827 | ||
828 | if (!nvme_fc_rport_get(rport)) | |
e399441d JS |
829 | return -ESHUTDOWN; |
830 | ||
831 | lsreq->done = done; | |
c913a8b0 | 832 | lsop->rport = rport; |
e399441d JS |
833 | lsop->req_queued = false; |
834 | INIT_LIST_HEAD(&lsop->lsreq_list); | |
835 | init_completion(&lsop->ls_done); | |
836 | ||
c913a8b0 | 837 | lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, |
e399441d JS |
838 | lsreq->rqstlen + lsreq->rsplen, |
839 | DMA_BIDIRECTIONAL); | |
c913a8b0 JS |
840 | if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { |
841 | ret = -EFAULT; | |
842 | goto out_putrport; | |
e399441d JS |
843 | } |
844 | lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; | |
845 | ||
c913a8b0 | 846 | spin_lock_irqsave(&rport->lock, flags); |
e399441d | 847 | |
c913a8b0 | 848 | list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); |
e399441d JS |
849 | |
850 | lsop->req_queued = true; | |
851 | ||
c913a8b0 | 852 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 853 | |
c913a8b0 JS |
854 | ret = rport->lport->ops->ls_req(&rport->lport->localport, |
855 | &rport->remoteport, lsreq); | |
e399441d | 856 | if (ret) |
c913a8b0 JS |
857 | goto out_unlink; |
858 | ||
859 | return 0; | |
860 | ||
861 | out_unlink: | |
862 | lsop->ls_error = ret; | |
863 | spin_lock_irqsave(&rport->lock, flags); | |
864 | lsop->req_queued = false; | |
865 | list_del(&lsop->lsreq_list); | |
866 | spin_unlock_irqrestore(&rport->lock, flags); | |
867 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, | |
868 | (lsreq->rqstlen + lsreq->rsplen), | |
869 | DMA_BIDIRECTIONAL); | |
870 | out_putrport: | |
871 | nvme_fc_rport_put(rport); | |
e399441d JS |
872 | |
873 | return ret; | |
874 | } | |
875 | ||
876 | static void | |
877 | nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) | |
878 | { | |
879 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
880 | ||
881 | lsop->ls_error = status; | |
882 | complete(&lsop->ls_done); | |
883 | } | |
884 | ||
885 | static int | |
c913a8b0 | 886 | nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) |
e399441d JS |
887 | { |
888 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
889 | struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; | |
890 | int ret; | |
891 | ||
c913a8b0 | 892 | ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); |
e399441d | 893 | |
c913a8b0 | 894 | if (!ret) { |
e399441d JS |
895 | /* |
896 | * No timeout/not interruptible as we need the struct | |
897 | * to exist until the lldd calls us back. Thus mandate | |
898 | * wait until driver calls back. lldd responsible for | |
899 | * the timeout action | |
900 | */ | |
901 | wait_for_completion(&lsop->ls_done); | |
902 | ||
c913a8b0 | 903 | __nvme_fc_finish_ls_req(lsop); |
e399441d | 904 | |
c913a8b0 | 905 | ret = lsop->ls_error; |
e399441d JS |
906 | } |
907 | ||
c913a8b0 JS |
908 | if (ret) |
909 | return ret; | |
910 | ||
e399441d JS |
911 | /* ACC or RJT payload ? */ |
912 | if (rjt->w0.ls_cmd == FCNVME_LS_RJT) | |
913 | return -ENXIO; | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
c913a8b0 JS |
918 | static int |
919 | nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, | |
e399441d JS |
920 | struct nvmefc_ls_req_op *lsop, |
921 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
922 | { | |
e399441d JS |
923 | /* don't wait for completion */ |
924 | ||
c913a8b0 | 925 | return __nvme_fc_send_ls_req(rport, lsop, done); |
e399441d JS |
926 | } |
927 | ||
928 | /* Validation Error indexes into the string table below */ | |
929 | enum { | |
930 | VERR_NO_ERROR = 0, | |
931 | VERR_LSACC = 1, | |
932 | VERR_LSDESC_RQST = 2, | |
933 | VERR_LSDESC_RQST_LEN = 3, | |
934 | VERR_ASSOC_ID = 4, | |
935 | VERR_ASSOC_ID_LEN = 5, | |
936 | VERR_CONN_ID = 6, | |
937 | VERR_CONN_ID_LEN = 7, | |
938 | VERR_CR_ASSOC = 8, | |
939 | VERR_CR_ASSOC_ACC_LEN = 9, | |
940 | VERR_CR_CONN = 10, | |
941 | VERR_CR_CONN_ACC_LEN = 11, | |
942 | VERR_DISCONN = 12, | |
943 | VERR_DISCONN_ACC_LEN = 13, | |
944 | }; | |
945 | ||
946 | static char *validation_errors[] = { | |
947 | "OK", | |
948 | "Not LS_ACC", | |
949 | "Not LSDESC_RQST", | |
950 | "Bad LSDESC_RQST Length", | |
951 | "Not Association ID", | |
952 | "Bad Association ID Length", | |
953 | "Not Connection ID", | |
954 | "Bad Connection ID Length", | |
955 | "Not CR_ASSOC Rqst", | |
956 | "Bad CR_ASSOC ACC Length", | |
957 | "Not CR_CONN Rqst", | |
958 | "Bad CR_CONN ACC Length", | |
959 | "Not Disconnect Rqst", | |
960 | "Bad Disconnect ACC Length", | |
961 | }; | |
962 | ||
963 | static int | |
964 | nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, | |
965 | struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) | |
966 | { | |
967 | struct nvmefc_ls_req_op *lsop; | |
968 | struct nvmefc_ls_req *lsreq; | |
969 | struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; | |
970 | struct fcnvme_ls_cr_assoc_acc *assoc_acc; | |
971 | int ret, fcret = 0; | |
972 | ||
973 | lsop = kzalloc((sizeof(*lsop) + | |
974 | ctrl->lport->ops->lsrqst_priv_sz + | |
975 | sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); | |
976 | if (!lsop) { | |
977 | ret = -ENOMEM; | |
978 | goto out_no_memory; | |
979 | } | |
980 | lsreq = &lsop->ls_req; | |
981 | ||
982 | lsreq->private = (void *)&lsop[1]; | |
983 | assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) | |
984 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
985 | assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; | |
986 | ||
987 | assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; | |
988 | assoc_rqst->desc_list_len = | |
989 | cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
990 | ||
991 | assoc_rqst->assoc_cmd.desc_tag = | |
992 | cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); | |
993 | assoc_rqst->assoc_cmd.desc_len = | |
994 | fcnvme_lsdesc_len( | |
995 | sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
996 | ||
997 | assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
998 | assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); | |
999 | /* Linux supports only Dynamic controllers */ | |
1000 | assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); | |
8e412263 | 1001 | uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); |
e399441d JS |
1002 | strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, |
1003 | min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); | |
1004 | strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, | |
1005 | min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); | |
1006 | ||
1007 | lsop->queue = queue; | |
1008 | lsreq->rqstaddr = assoc_rqst; | |
1009 | lsreq->rqstlen = sizeof(*assoc_rqst); | |
1010 | lsreq->rspaddr = assoc_acc; | |
1011 | lsreq->rsplen = sizeof(*assoc_acc); | |
1012 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1013 | ||
c913a8b0 | 1014 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1015 | if (ret) |
1016 | goto out_free_buffer; | |
1017 | ||
1018 | /* process connect LS completion */ | |
1019 | ||
1020 | /* validate the ACC response */ | |
1021 | if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1022 | fcret = VERR_LSACC; | |
f77fc87c | 1023 | else if (assoc_acc->hdr.desc_list_len != |
e399441d JS |
1024 | fcnvme_lsdesc_len( |
1025 | sizeof(struct fcnvme_ls_cr_assoc_acc))) | |
1026 | fcret = VERR_CR_ASSOC_ACC_LEN; | |
f77fc87c JS |
1027 | else if (assoc_acc->hdr.rqst.desc_tag != |
1028 | cpu_to_be32(FCNVME_LSDESC_RQST)) | |
e399441d JS |
1029 | fcret = VERR_LSDESC_RQST; |
1030 | else if (assoc_acc->hdr.rqst.desc_len != | |
1031 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1032 | fcret = VERR_LSDESC_RQST_LEN; | |
1033 | else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) | |
1034 | fcret = VERR_CR_ASSOC; | |
1035 | else if (assoc_acc->associd.desc_tag != | |
1036 | cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) | |
1037 | fcret = VERR_ASSOC_ID; | |
1038 | else if (assoc_acc->associd.desc_len != | |
1039 | fcnvme_lsdesc_len( | |
1040 | sizeof(struct fcnvme_lsdesc_assoc_id))) | |
1041 | fcret = VERR_ASSOC_ID_LEN; | |
1042 | else if (assoc_acc->connectid.desc_tag != | |
1043 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1044 | fcret = VERR_CONN_ID; | |
1045 | else if (assoc_acc->connectid.desc_len != | |
1046 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1047 | fcret = VERR_CONN_ID_LEN; | |
1048 | ||
1049 | if (fcret) { | |
1050 | ret = -EBADF; | |
1051 | dev_err(ctrl->dev, | |
1052 | "q %d connect failed: %s\n", | |
1053 | queue->qnum, validation_errors[fcret]); | |
1054 | } else { | |
1055 | ctrl->association_id = | |
1056 | be64_to_cpu(assoc_acc->associd.association_id); | |
1057 | queue->connection_id = | |
1058 | be64_to_cpu(assoc_acc->connectid.connection_id); | |
1059 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1060 | } | |
1061 | ||
1062 | out_free_buffer: | |
1063 | kfree(lsop); | |
1064 | out_no_memory: | |
1065 | if (ret) | |
1066 | dev_err(ctrl->dev, | |
1067 | "queue %d connect admin queue failed (%d).\n", | |
1068 | queue->qnum, ret); | |
1069 | return ret; | |
1070 | } | |
1071 | ||
1072 | static int | |
1073 | nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, | |
1074 | u16 qsize, u16 ersp_ratio) | |
1075 | { | |
1076 | struct nvmefc_ls_req_op *lsop; | |
1077 | struct nvmefc_ls_req *lsreq; | |
1078 | struct fcnvme_ls_cr_conn_rqst *conn_rqst; | |
1079 | struct fcnvme_ls_cr_conn_acc *conn_acc; | |
1080 | int ret, fcret = 0; | |
1081 | ||
1082 | lsop = kzalloc((sizeof(*lsop) + | |
1083 | ctrl->lport->ops->lsrqst_priv_sz + | |
1084 | sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); | |
1085 | if (!lsop) { | |
1086 | ret = -ENOMEM; | |
1087 | goto out_no_memory; | |
1088 | } | |
1089 | lsreq = &lsop->ls_req; | |
1090 | ||
1091 | lsreq->private = (void *)&lsop[1]; | |
1092 | conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) | |
1093 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1094 | conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; | |
1095 | ||
1096 | conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; | |
1097 | conn_rqst->desc_list_len = cpu_to_be32( | |
1098 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1099 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1100 | ||
1101 | conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1102 | conn_rqst->associd.desc_len = | |
1103 | fcnvme_lsdesc_len( | |
1104 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1105 | conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1106 | conn_rqst->connect_cmd.desc_tag = | |
1107 | cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); | |
1108 | conn_rqst->connect_cmd.desc_len = | |
1109 | fcnvme_lsdesc_len( | |
1110 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1111 | conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
1112 | conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); | |
1113 | conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); | |
1114 | ||
1115 | lsop->queue = queue; | |
1116 | lsreq->rqstaddr = conn_rqst; | |
1117 | lsreq->rqstlen = sizeof(*conn_rqst); | |
1118 | lsreq->rspaddr = conn_acc; | |
1119 | lsreq->rsplen = sizeof(*conn_acc); | |
1120 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1121 | ||
c913a8b0 | 1122 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1123 | if (ret) |
1124 | goto out_free_buffer; | |
1125 | ||
1126 | /* process connect LS completion */ | |
1127 | ||
1128 | /* validate the ACC response */ | |
1129 | if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1130 | fcret = VERR_LSACC; | |
f77fc87c | 1131 | else if (conn_acc->hdr.desc_list_len != |
e399441d JS |
1132 | fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) |
1133 | fcret = VERR_CR_CONN_ACC_LEN; | |
f77fc87c | 1134 | else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) |
e399441d JS |
1135 | fcret = VERR_LSDESC_RQST; |
1136 | else if (conn_acc->hdr.rqst.desc_len != | |
1137 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1138 | fcret = VERR_LSDESC_RQST_LEN; | |
1139 | else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) | |
1140 | fcret = VERR_CR_CONN; | |
1141 | else if (conn_acc->connectid.desc_tag != | |
1142 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1143 | fcret = VERR_CONN_ID; | |
1144 | else if (conn_acc->connectid.desc_len != | |
1145 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1146 | fcret = VERR_CONN_ID_LEN; | |
1147 | ||
1148 | if (fcret) { | |
1149 | ret = -EBADF; | |
1150 | dev_err(ctrl->dev, | |
1151 | "q %d connect failed: %s\n", | |
1152 | queue->qnum, validation_errors[fcret]); | |
1153 | } else { | |
1154 | queue->connection_id = | |
1155 | be64_to_cpu(conn_acc->connectid.connection_id); | |
1156 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1157 | } | |
1158 | ||
1159 | out_free_buffer: | |
1160 | kfree(lsop); | |
1161 | out_no_memory: | |
1162 | if (ret) | |
1163 | dev_err(ctrl->dev, | |
1164 | "queue %d connect command failed (%d).\n", | |
1165 | queue->qnum, ret); | |
1166 | return ret; | |
1167 | } | |
1168 | ||
1169 | static void | |
1170 | nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) | |
1171 | { | |
1172 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
e399441d | 1173 | |
c913a8b0 | 1174 | __nvme_fc_finish_ls_req(lsop); |
e399441d JS |
1175 | |
1176 | /* fc-nvme iniator doesn't care about success or failure of cmd */ | |
1177 | ||
1178 | kfree(lsop); | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * This routine sends a FC-NVME LS to disconnect (aka terminate) | |
1183 | * the FC-NVME Association. Terminating the association also | |
1184 | * terminates the FC-NVME connections (per queue, both admin and io | |
1185 | * queues) that are part of the association. E.g. things are torn | |
1186 | * down, and the related FC-NVME Association ID and Connection IDs | |
1187 | * become invalid. | |
1188 | * | |
1189 | * The behavior of the fc-nvme initiator is such that it's | |
1190 | * understanding of the association and connections will implicitly | |
1191 | * be torn down. The action is implicit as it may be due to a loss of | |
1192 | * connectivity with the fc-nvme target, so you may never get a | |
1193 | * response even if you tried. As such, the action of this routine | |
1194 | * is to asynchronously send the LS, ignore any results of the LS, and | |
1195 | * continue on with terminating the association. If the fc-nvme target | |
1196 | * is present and receives the LS, it too can tear down. | |
1197 | */ | |
1198 | static void | |
1199 | nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) | |
1200 | { | |
1201 | struct fcnvme_ls_disconnect_rqst *discon_rqst; | |
1202 | struct fcnvme_ls_disconnect_acc *discon_acc; | |
1203 | struct nvmefc_ls_req_op *lsop; | |
1204 | struct nvmefc_ls_req *lsreq; | |
c913a8b0 | 1205 | int ret; |
e399441d JS |
1206 | |
1207 | lsop = kzalloc((sizeof(*lsop) + | |
1208 | ctrl->lport->ops->lsrqst_priv_sz + | |
1209 | sizeof(*discon_rqst) + sizeof(*discon_acc)), | |
1210 | GFP_KERNEL); | |
1211 | if (!lsop) | |
1212 | /* couldn't sent it... too bad */ | |
1213 | return; | |
1214 | ||
1215 | lsreq = &lsop->ls_req; | |
1216 | ||
1217 | lsreq->private = (void *)&lsop[1]; | |
1218 | discon_rqst = (struct fcnvme_ls_disconnect_rqst *) | |
1219 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1220 | discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; | |
1221 | ||
1222 | discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; | |
1223 | discon_rqst->desc_list_len = cpu_to_be32( | |
1224 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1225 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1226 | ||
1227 | discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1228 | discon_rqst->associd.desc_len = | |
1229 | fcnvme_lsdesc_len( | |
1230 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1231 | ||
1232 | discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1233 | ||
1234 | discon_rqst->discon_cmd.desc_tag = cpu_to_be32( | |
1235 | FCNVME_LSDESC_DISCONN_CMD); | |
1236 | discon_rqst->discon_cmd.desc_len = | |
1237 | fcnvme_lsdesc_len( | |
1238 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1239 | discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; | |
1240 | discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); | |
1241 | ||
1242 | lsreq->rqstaddr = discon_rqst; | |
1243 | lsreq->rqstlen = sizeof(*discon_rqst); | |
1244 | lsreq->rspaddr = discon_acc; | |
1245 | lsreq->rsplen = sizeof(*discon_acc); | |
1246 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1247 | ||
c913a8b0 JS |
1248 | ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, |
1249 | nvme_fc_disconnect_assoc_done); | |
1250 | if (ret) | |
1251 | kfree(lsop); | |
e399441d JS |
1252 | |
1253 | /* only meaningful part to terminating the association */ | |
1254 | ctrl->association_id = 0; | |
1255 | } | |
1256 | ||
1257 | ||
1258 | /* *********************** NVME Ctrl Routines **************************** */ | |
1259 | ||
78a7ac26 | 1260 | static void __nvme_fc_final_op_cleanup(struct request *rq); |
f874d5d0 | 1261 | static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); |
e399441d JS |
1262 | |
1263 | static int | |
1264 | nvme_fc_reinit_request(void *data, struct request *rq) | |
1265 | { | |
1266 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1267 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1268 | ||
1269 | memset(cmdiu, 0, sizeof(*cmdiu)); | |
1270 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1271 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1272 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1273 | memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); | |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | static void | |
1279 | __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, | |
1280 | struct nvme_fc_fcp_op *op) | |
1281 | { | |
1282 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, | |
1283 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1284 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, | |
1285 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1286 | ||
1287 | atomic_set(&op->state, FCPOP_STATE_UNINIT); | |
1288 | } | |
1289 | ||
1290 | static void | |
d6296d39 CH |
1291 | nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
1292 | unsigned int hctx_idx) | |
e399441d JS |
1293 | { |
1294 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1295 | ||
d6296d39 | 1296 | return __nvme_fc_exit_request(set->driver_data, op); |
e399441d JS |
1297 | } |
1298 | ||
78a7ac26 JS |
1299 | static int |
1300 | __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) | |
1301 | { | |
1302 | int state; | |
1303 | ||
1304 | state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); | |
1305 | if (state != FCPOP_STATE_ACTIVE) { | |
1306 | atomic_set(&op->state, state); | |
1307 | return -ECANCELED; | |
1308 | } | |
1309 | ||
1310 | ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, | |
1311 | &ctrl->rport->remoteport, | |
1312 | op->queue->lldd_handle, | |
1313 | &op->fcp_req); | |
1314 | ||
1315 | return 0; | |
1316 | } | |
1317 | ||
e399441d | 1318 | static void |
78a7ac26 | 1319 | nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
1320 | { |
1321 | struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; | |
78a7ac26 JS |
1322 | unsigned long flags; |
1323 | int i, ret; | |
e399441d JS |
1324 | |
1325 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
78a7ac26 | 1326 | if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) |
e399441d | 1327 | continue; |
78a7ac26 JS |
1328 | |
1329 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1330 | if (ctrl->flags & FCCTRL_TERMIO) { |
1331 | ctrl->iocnt++; | |
1332 | aen_op->flags |= FCOP_FLAGS_TERMIO; | |
1333 | } | |
78a7ac26 JS |
1334 | spin_unlock_irqrestore(&ctrl->lock, flags); |
1335 | ||
1336 | ret = __nvme_fc_abort_op(ctrl, aen_op); | |
1337 | if (ret) { | |
1338 | /* | |
1339 | * if __nvme_fc_abort_op failed the io wasn't | |
1340 | * active. Thus this call path is running in | |
1341 | * parallel to the io complete. Treat as non-error. | |
1342 | */ | |
1343 | ||
1344 | /* back out the flags/counters */ | |
1345 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
1346 | if (ctrl->flags & FCCTRL_TERMIO) |
1347 | ctrl->iocnt--; | |
78a7ac26 JS |
1348 | aen_op->flags &= ~FCOP_FLAGS_TERMIO; |
1349 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1350 | return; | |
1351 | } | |
e399441d JS |
1352 | } |
1353 | } | |
1354 | ||
78a7ac26 JS |
1355 | static inline int |
1356 | __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, | |
1357 | struct nvme_fc_fcp_op *op) | |
1358 | { | |
1359 | unsigned long flags; | |
1360 | bool complete_rq = false; | |
1361 | ||
1362 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef | 1363 | if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { |
36715cf4 JS |
1364 | if (ctrl->flags & FCCTRL_TERMIO) { |
1365 | if (!--ctrl->iocnt) | |
1366 | wake_up(&ctrl->ioabort_wait); | |
1367 | } | |
61bff8ef | 1368 | } |
78a7ac26 JS |
1369 | if (op->flags & FCOP_FLAGS_RELEASED) |
1370 | complete_rq = true; | |
1371 | else | |
1372 | op->flags |= FCOP_FLAGS_COMPLETE; | |
1373 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
1374 | ||
1375 | return complete_rq; | |
1376 | } | |
1377 | ||
baee29ac | 1378 | static void |
e399441d JS |
1379 | nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) |
1380 | { | |
1381 | struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); | |
1382 | struct request *rq = op->rq; | |
1383 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1384 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1385 | struct nvme_fc_queue *queue = op->queue; | |
1386 | struct nvme_completion *cqe = &op->rsp_iu.cqe; | |
458f280d | 1387 | struct nvme_command *sqe = &op->cmd_iu.sqe; |
d663b69f | 1388 | __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); |
27fa9bc5 | 1389 | union nvme_result result; |
f874d5d0 | 1390 | bool complete_rq, terminate_assoc = true; |
e399441d JS |
1391 | |
1392 | /* | |
1393 | * WARNING: | |
1394 | * The current linux implementation of a nvme controller | |
1395 | * allocates a single tag set for all io queues and sizes | |
1396 | * the io queues to fully hold all possible tags. Thus, the | |
1397 | * implementation does not reference or care about the sqhd | |
1398 | * value as it never needs to use the sqhd/sqtail pointers | |
1399 | * for submission pacing. | |
1400 | * | |
1401 | * This affects the FC-NVME implementation in two ways: | |
1402 | * 1) As the value doesn't matter, we don't need to waste | |
1403 | * cycles extracting it from ERSPs and stamping it in the | |
1404 | * cases where the transport fabricates CQEs on successful | |
1405 | * completions. | |
1406 | * 2) The FC-NVME implementation requires that delivery of | |
1407 | * ERSP completions are to go back to the nvme layer in order | |
1408 | * relative to the rsn, such that the sqhd value will always | |
1409 | * be "in order" for the nvme layer. As the nvme layer in | |
1410 | * linux doesn't care about sqhd, there's no need to return | |
1411 | * them in order. | |
1412 | * | |
1413 | * Additionally: | |
1414 | * As the core nvme layer in linux currently does not look at | |
1415 | * every field in the cqe - in cases where the FC transport must | |
1416 | * fabricate a CQE, the following fields will not be set as they | |
1417 | * are not referenced: | |
1418 | * cqe.sqid, cqe.sqhd, cqe.command_id | |
f874d5d0 JS |
1419 | * |
1420 | * Failure or error of an individual i/o, in a transport | |
1421 | * detected fashion unrelated to the nvme completion status, | |
1422 | * potentially cause the initiator and target sides to get out | |
1423 | * of sync on SQ head/tail (aka outstanding io count allowed). | |
1424 | * Per FC-NVME spec, failure of an individual command requires | |
1425 | * the connection to be terminated, which in turn requires the | |
1426 | * association to be terminated. | |
e399441d JS |
1427 | */ |
1428 | ||
1429 | fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, | |
1430 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1431 | ||
1432 | if (atomic_read(&op->state) == FCPOP_STATE_ABORTED) | |
d663b69f | 1433 | status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); |
62eeacb0 | 1434 | else if (freq->status) |
56b7103a | 1435 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1436 | |
1437 | /* | |
1438 | * For the linux implementation, if we have an unsuccesful | |
1439 | * status, they blk-mq layer can typically be called with the | |
1440 | * non-zero status and the content of the cqe isn't important. | |
1441 | */ | |
1442 | if (status) | |
1443 | goto done; | |
1444 | ||
1445 | /* | |
1446 | * command completed successfully relative to the wire | |
1447 | * protocol. However, validate anything received and | |
1448 | * extract the status and result from the cqe (create it | |
1449 | * where necessary). | |
1450 | */ | |
1451 | ||
1452 | switch (freq->rcv_rsplen) { | |
1453 | ||
1454 | case 0: | |
1455 | case NVME_FC_SIZEOF_ZEROS_RSP: | |
1456 | /* | |
1457 | * No response payload or 12 bytes of payload (which | |
1458 | * should all be zeros) are considered successful and | |
1459 | * no payload in the CQE by the transport. | |
1460 | */ | |
1461 | if (freq->transferred_length != | |
1462 | be32_to_cpu(op->cmd_iu.data_len)) { | |
56b7103a | 1463 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1464 | goto done; |
1465 | } | |
27fa9bc5 | 1466 | result.u64 = 0; |
e399441d JS |
1467 | break; |
1468 | ||
1469 | case sizeof(struct nvme_fc_ersp_iu): | |
1470 | /* | |
1471 | * The ERSP IU contains a full completion with CQE. | |
1472 | * Validate ERSP IU and look at cqe. | |
1473 | */ | |
1474 | if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != | |
1475 | (freq->rcv_rsplen / 4) || | |
1476 | be32_to_cpu(op->rsp_iu.xfrd_len) != | |
1477 | freq->transferred_length || | |
726a1080 | 1478 | op->rsp_iu.status_code || |
458f280d | 1479 | sqe->common.command_id != cqe->command_id)) { |
56b7103a | 1480 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1481 | goto done; |
1482 | } | |
27fa9bc5 | 1483 | result = cqe->result; |
d663b69f | 1484 | status = cqe->status; |
e399441d JS |
1485 | break; |
1486 | ||
1487 | default: | |
56b7103a | 1488 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1489 | goto done; |
1490 | } | |
1491 | ||
f874d5d0 JS |
1492 | terminate_assoc = false; |
1493 | ||
e399441d | 1494 | done: |
78a7ac26 | 1495 | if (op->flags & FCOP_FLAGS_AEN) { |
27fa9bc5 | 1496 | nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); |
78a7ac26 JS |
1497 | complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); |
1498 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1499 | op->flags = FCOP_FLAGS_AEN; /* clear other flags */ | |
e399441d | 1500 | nvme_fc_ctrl_put(ctrl); |
f874d5d0 | 1501 | goto check_error; |
e399441d JS |
1502 | } |
1503 | ||
78a7ac26 JS |
1504 | complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); |
1505 | if (!complete_rq) { | |
1506 | if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { | |
e392e1f1 | 1507 | status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); |
78a7ac26 | 1508 | if (blk_queue_dying(rq->q)) |
e392e1f1 | 1509 | status |= cpu_to_le16(NVME_SC_DNR << 1); |
78a7ac26 JS |
1510 | } |
1511 | nvme_end_request(rq, status, result); | |
1512 | } else | |
1513 | __nvme_fc_final_op_cleanup(rq); | |
f874d5d0 JS |
1514 | |
1515 | check_error: | |
1516 | if (terminate_assoc) | |
1517 | nvme_fc_error_recovery(ctrl, "transport detected io error"); | |
e399441d JS |
1518 | } |
1519 | ||
1520 | static int | |
1521 | __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, | |
1522 | struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, | |
1523 | struct request *rq, u32 rqno) | |
1524 | { | |
1525 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
1526 | int ret = 0; | |
1527 | ||
1528 | memset(op, 0, sizeof(*op)); | |
1529 | op->fcp_req.cmdaddr = &op->cmd_iu; | |
1530 | op->fcp_req.cmdlen = sizeof(op->cmd_iu); | |
1531 | op->fcp_req.rspaddr = &op->rsp_iu; | |
1532 | op->fcp_req.rsplen = sizeof(op->rsp_iu); | |
1533 | op->fcp_req.done = nvme_fc_fcpio_done; | |
1534 | op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; | |
1535 | op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; | |
1536 | op->ctrl = ctrl; | |
1537 | op->queue = queue; | |
1538 | op->rq = rq; | |
1539 | op->rqno = rqno; | |
1540 | ||
1541 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1542 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1543 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1544 | ||
1545 | op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, | |
1546 | &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1547 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { | |
1548 | dev_err(ctrl->dev, | |
1549 | "FCP Op failed - cmdiu dma mapping failed.\n"); | |
1550 | ret = EFAULT; | |
1551 | goto out_on_error; | |
1552 | } | |
1553 | ||
1554 | op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, | |
1555 | &op->rsp_iu, sizeof(op->rsp_iu), | |
1556 | DMA_FROM_DEVICE); | |
1557 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { | |
1558 | dev_err(ctrl->dev, | |
1559 | "FCP Op failed - rspiu dma mapping failed.\n"); | |
1560 | ret = EFAULT; | |
1561 | } | |
1562 | ||
1563 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1564 | out_on_error: | |
1565 | return ret; | |
1566 | } | |
1567 | ||
1568 | static int | |
d6296d39 CH |
1569 | nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, |
1570 | unsigned int hctx_idx, unsigned int numa_node) | |
e399441d | 1571 | { |
d6296d39 | 1572 | struct nvme_fc_ctrl *ctrl = set->driver_data; |
e399441d | 1573 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); |
76f983cb CH |
1574 | int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; |
1575 | struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; | |
e399441d JS |
1576 | |
1577 | return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); | |
1578 | } | |
1579 | ||
1580 | static int | |
1581 | nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1582 | { | |
1583 | struct nvme_fc_fcp_op *aen_op; | |
1584 | struct nvme_fc_cmd_iu *cmdiu; | |
1585 | struct nvme_command *sqe; | |
61bff8ef | 1586 | void *private; |
e399441d JS |
1587 | int i, ret; |
1588 | ||
1589 | aen_op = ctrl->aen_ops; | |
1590 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
61bff8ef JS |
1591 | private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, |
1592 | GFP_KERNEL); | |
1593 | if (!private) | |
1594 | return -ENOMEM; | |
1595 | ||
e399441d JS |
1596 | cmdiu = &aen_op->cmd_iu; |
1597 | sqe = &cmdiu->sqe; | |
1598 | ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], | |
1599 | aen_op, (struct request *)NULL, | |
1600 | (AEN_CMDID_BASE + i)); | |
61bff8ef JS |
1601 | if (ret) { |
1602 | kfree(private); | |
e399441d | 1603 | return ret; |
61bff8ef | 1604 | } |
e399441d | 1605 | |
78a7ac26 | 1606 | aen_op->flags = FCOP_FLAGS_AEN; |
61bff8ef JS |
1607 | aen_op->fcp_req.first_sgl = NULL; /* no sg list */ |
1608 | aen_op->fcp_req.private = private; | |
78a7ac26 | 1609 | |
e399441d JS |
1610 | memset(sqe, 0, sizeof(*sqe)); |
1611 | sqe->common.opcode = nvme_admin_async_event; | |
78a7ac26 | 1612 | /* Note: core layer may overwrite the sqe.command_id value */ |
e399441d JS |
1613 | sqe->common.command_id = AEN_CMDID_BASE + i; |
1614 | } | |
1615 | return 0; | |
1616 | } | |
1617 | ||
61bff8ef JS |
1618 | static void |
1619 | nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1620 | { | |
1621 | struct nvme_fc_fcp_op *aen_op; | |
1622 | int i; | |
1623 | ||
1624 | aen_op = ctrl->aen_ops; | |
1625 | for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { | |
1626 | if (!aen_op->fcp_req.private) | |
1627 | continue; | |
1628 | ||
1629 | __nvme_fc_exit_request(ctrl, aen_op); | |
1630 | ||
1631 | kfree(aen_op->fcp_req.private); | |
1632 | aen_op->fcp_req.private = NULL; | |
1633 | } | |
1634 | } | |
e399441d JS |
1635 | |
1636 | static inline void | |
1637 | __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, | |
1638 | unsigned int qidx) | |
1639 | { | |
1640 | struct nvme_fc_queue *queue = &ctrl->queues[qidx]; | |
1641 | ||
1642 | hctx->driver_data = queue; | |
1643 | queue->hctx = hctx; | |
1644 | } | |
1645 | ||
1646 | static int | |
1647 | nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1648 | unsigned int hctx_idx) | |
1649 | { | |
1650 | struct nvme_fc_ctrl *ctrl = data; | |
1651 | ||
1652 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | static int | |
1658 | nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1659 | unsigned int hctx_idx) | |
1660 | { | |
1661 | struct nvme_fc_ctrl *ctrl = data; | |
1662 | ||
1663 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | static void | |
1669 | nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx, size_t queue_size) | |
1670 | { | |
1671 | struct nvme_fc_queue *queue; | |
1672 | ||
1673 | queue = &ctrl->queues[idx]; | |
1674 | memset(queue, 0, sizeof(*queue)); | |
1675 | queue->ctrl = ctrl; | |
1676 | queue->qnum = idx; | |
1677 | atomic_set(&queue->csn, 1); | |
1678 | queue->dev = ctrl->dev; | |
1679 | ||
1680 | if (idx > 0) | |
1681 | queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; | |
1682 | else | |
1683 | queue->cmnd_capsule_len = sizeof(struct nvme_command); | |
1684 | ||
1685 | queue->queue_size = queue_size; | |
1686 | ||
1687 | /* | |
1688 | * Considered whether we should allocate buffers for all SQEs | |
1689 | * and CQEs and dma map them - mapping their respective entries | |
1690 | * into the request structures (kernel vm addr and dma address) | |
1691 | * thus the driver could use the buffers/mappings directly. | |
1692 | * It only makes sense if the LLDD would use them for its | |
1693 | * messaging api. It's very unlikely most adapter api's would use | |
1694 | * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload | |
1695 | * structures were used instead. | |
1696 | */ | |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * This routine terminates a queue at the transport level. | |
1701 | * The transport has already ensured that all outstanding ios on | |
1702 | * the queue have been terminated. | |
1703 | * The transport will send a Disconnect LS request to terminate | |
1704 | * the queue's connection. Termination of the admin queue will also | |
1705 | * terminate the association at the target. | |
1706 | */ | |
1707 | static void | |
1708 | nvme_fc_free_queue(struct nvme_fc_queue *queue) | |
1709 | { | |
1710 | if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) | |
1711 | return; | |
1712 | ||
1713 | /* | |
1714 | * Current implementation never disconnects a single queue. | |
1715 | * It always terminates a whole association. So there is never | |
1716 | * a disconnect(queue) LS sent to the target. | |
1717 | */ | |
1718 | ||
1719 | queue->connection_id = 0; | |
1720 | clear_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1721 | } | |
1722 | ||
1723 | static void | |
1724 | __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1725 | struct nvme_fc_queue *queue, unsigned int qidx) | |
1726 | { | |
1727 | if (ctrl->lport->ops->delete_queue) | |
1728 | ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, | |
1729 | queue->lldd_handle); | |
1730 | queue->lldd_handle = NULL; | |
1731 | } | |
1732 | ||
e399441d JS |
1733 | static void |
1734 | nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) | |
1735 | { | |
1736 | int i; | |
1737 | ||
d858e5f0 | 1738 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
e399441d JS |
1739 | nvme_fc_free_queue(&ctrl->queues[i]); |
1740 | } | |
1741 | ||
1742 | static int | |
1743 | __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1744 | struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) | |
1745 | { | |
1746 | int ret = 0; | |
1747 | ||
1748 | queue->lldd_handle = NULL; | |
1749 | if (ctrl->lport->ops->create_queue) | |
1750 | ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, | |
1751 | qidx, qsize, &queue->lldd_handle); | |
1752 | ||
1753 | return ret; | |
1754 | } | |
1755 | ||
1756 | static void | |
1757 | nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) | |
1758 | { | |
d858e5f0 | 1759 | struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; |
e399441d JS |
1760 | int i; |
1761 | ||
d858e5f0 | 1762 | for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) |
e399441d JS |
1763 | __nvme_fc_delete_hw_queue(ctrl, queue, i); |
1764 | } | |
1765 | ||
1766 | static int | |
1767 | nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1768 | { | |
1769 | struct nvme_fc_queue *queue = &ctrl->queues[1]; | |
17a1ec08 | 1770 | int i, ret; |
e399441d | 1771 | |
d858e5f0 | 1772 | for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { |
e399441d | 1773 | ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); |
17a1ec08 JT |
1774 | if (ret) |
1775 | goto delete_queues; | |
e399441d JS |
1776 | } |
1777 | ||
1778 | return 0; | |
17a1ec08 JT |
1779 | |
1780 | delete_queues: | |
1781 | for (; i >= 0; i--) | |
1782 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); | |
1783 | return ret; | |
e399441d JS |
1784 | } |
1785 | ||
1786 | static int | |
1787 | nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1788 | { | |
1789 | int i, ret = 0; | |
1790 | ||
d858e5f0 | 1791 | for (i = 1; i < ctrl->ctrl.queue_count; i++) { |
e399441d JS |
1792 | ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, |
1793 | (qsize / 5)); | |
1794 | if (ret) | |
1795 | break; | |
1796 | ret = nvmf_connect_io_queue(&ctrl->ctrl, i); | |
1797 | if (ret) | |
1798 | break; | |
1799 | } | |
1800 | ||
1801 | return ret; | |
1802 | } | |
1803 | ||
1804 | static void | |
1805 | nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) | |
1806 | { | |
1807 | int i; | |
1808 | ||
d858e5f0 | 1809 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
e399441d JS |
1810 | nvme_fc_init_queue(ctrl, i, ctrl->ctrl.sqsize); |
1811 | } | |
1812 | ||
1813 | static void | |
1814 | nvme_fc_ctrl_free(struct kref *ref) | |
1815 | { | |
1816 | struct nvme_fc_ctrl *ctrl = | |
1817 | container_of(ref, struct nvme_fc_ctrl, ref); | |
1818 | unsigned long flags; | |
1819 | ||
61bff8ef JS |
1820 | if (ctrl->ctrl.tagset) { |
1821 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
1822 | blk_mq_free_tag_set(&ctrl->tag_set); | |
e399441d JS |
1823 | } |
1824 | ||
61bff8ef JS |
1825 | /* remove from rport list */ |
1826 | spin_lock_irqsave(&ctrl->rport->lock, flags); | |
1827 | list_del(&ctrl->ctrl_list); | |
1828 | spin_unlock_irqrestore(&ctrl->rport->lock, flags); | |
1829 | ||
f9c5af5f | 1830 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
1831 | blk_cleanup_queue(ctrl->ctrl.admin_q); |
1832 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
1833 | ||
1834 | kfree(ctrl->queues); | |
1835 | ||
e399441d JS |
1836 | put_device(ctrl->dev); |
1837 | nvme_fc_rport_put(ctrl->rport); | |
1838 | ||
e399441d | 1839 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
de41447a EM |
1840 | if (ctrl->ctrl.opts) |
1841 | nvmf_free_options(ctrl->ctrl.opts); | |
e399441d JS |
1842 | kfree(ctrl); |
1843 | } | |
1844 | ||
1845 | static void | |
1846 | nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) | |
1847 | { | |
1848 | kref_put(&ctrl->ref, nvme_fc_ctrl_free); | |
1849 | } | |
1850 | ||
1851 | static int | |
1852 | nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) | |
1853 | { | |
1854 | return kref_get_unless_zero(&ctrl->ref); | |
1855 | } | |
1856 | ||
1857 | /* | |
1858 | * All accesses from nvme core layer done - can now free the | |
1859 | * controller. Called after last nvme_put_ctrl() call | |
1860 | */ | |
1861 | static void | |
61bff8ef | 1862 | nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) |
e399441d JS |
1863 | { |
1864 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
1865 | ||
1866 | WARN_ON(nctrl != &ctrl->ctrl); | |
1867 | ||
61bff8ef JS |
1868 | nvme_fc_ctrl_put(ctrl); |
1869 | } | |
e399441d | 1870 | |
61bff8ef JS |
1871 | static void |
1872 | nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) | |
1873 | { | |
69fa9646 JS |
1874 | /* only proceed if in LIVE state - e.g. on first error */ |
1875 | if (ctrl->ctrl.state != NVME_CTRL_LIVE) | |
1876 | return; | |
1877 | ||
61bff8ef JS |
1878 | dev_warn(ctrl->ctrl.device, |
1879 | "NVME-FC{%d}: transport association error detected: %s\n", | |
1880 | ctrl->cnum, errmsg); | |
589ff775 | 1881 | dev_warn(ctrl->ctrl.device, |
61bff8ef | 1882 | "NVME-FC{%d}: resetting controller\n", ctrl->cnum); |
e399441d | 1883 | |
61bff8ef JS |
1884 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { |
1885 | dev_err(ctrl->ctrl.device, | |
1886 | "NVME-FC{%d}: error_recovery: Couldn't change state " | |
1887 | "to RECONNECTING\n", ctrl->cnum); | |
1888 | return; | |
e399441d JS |
1889 | } |
1890 | ||
d86c4d8e | 1891 | nvme_reset_ctrl(&ctrl->ctrl); |
e399441d JS |
1892 | } |
1893 | ||
baee29ac | 1894 | static enum blk_eh_timer_return |
e399441d JS |
1895 | nvme_fc_timeout(struct request *rq, bool reserved) |
1896 | { | |
1897 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1898 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1899 | int ret; | |
1900 | ||
1901 | if (reserved) | |
1902 | return BLK_EH_RESET_TIMER; | |
1903 | ||
1904 | ret = __nvme_fc_abort_op(ctrl, op); | |
1905 | if (ret) | |
1906 | /* io wasn't active to abort consider it done */ | |
1907 | return BLK_EH_HANDLED; | |
1908 | ||
1909 | /* | |
61bff8ef JS |
1910 | * we can't individually ABTS an io without affecting the queue, |
1911 | * thus killing the queue, adn thus the association. | |
1912 | * So resolve by performing a controller reset, which will stop | |
1913 | * the host/io stack, terminate the association on the link, | |
1914 | * and recreate an association on the link. | |
e399441d | 1915 | */ |
61bff8ef | 1916 | nvme_fc_error_recovery(ctrl, "io timeout error"); |
e399441d JS |
1917 | |
1918 | return BLK_EH_HANDLED; | |
1919 | } | |
1920 | ||
1921 | static int | |
1922 | nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
1923 | struct nvme_fc_fcp_op *op) | |
1924 | { | |
1925 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
e399441d JS |
1926 | enum dma_data_direction dir; |
1927 | int ret; | |
1928 | ||
1929 | freq->sg_cnt = 0; | |
1930 | ||
b131c61d | 1931 | if (!blk_rq_payload_bytes(rq)) |
e399441d JS |
1932 | return 0; |
1933 | ||
1934 | freq->sg_table.sgl = freq->first_sgl; | |
19e420bb CH |
1935 | ret = sg_alloc_table_chained(&freq->sg_table, |
1936 | blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); | |
e399441d JS |
1937 | if (ret) |
1938 | return -ENOMEM; | |
1939 | ||
1940 | op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); | |
19e420bb | 1941 | WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); |
e399441d JS |
1942 | dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
1943 | freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, | |
1944 | op->nents, dir); | |
1945 | if (unlikely(freq->sg_cnt <= 0)) { | |
1946 | sg_free_table_chained(&freq->sg_table, true); | |
1947 | freq->sg_cnt = 0; | |
1948 | return -EFAULT; | |
1949 | } | |
1950 | ||
1951 | /* | |
1952 | * TODO: blk_integrity_rq(rq) for DIF | |
1953 | */ | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | static void | |
1958 | nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
1959 | struct nvme_fc_fcp_op *op) | |
1960 | { | |
1961 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1962 | ||
1963 | if (!freq->sg_cnt) | |
1964 | return; | |
1965 | ||
1966 | fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, | |
1967 | ((rq_data_dir(rq) == WRITE) ? | |
1968 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
1969 | ||
1970 | nvme_cleanup_cmd(rq); | |
1971 | ||
1972 | sg_free_table_chained(&freq->sg_table, true); | |
1973 | ||
1974 | freq->sg_cnt = 0; | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | * In FC, the queue is a logical thing. At transport connect, the target | |
1979 | * creates its "queue" and returns a handle that is to be given to the | |
1980 | * target whenever it posts something to the corresponding SQ. When an | |
1981 | * SQE is sent on a SQ, FC effectively considers the SQE, or rather the | |
1982 | * command contained within the SQE, an io, and assigns a FC exchange | |
1983 | * to it. The SQE and the associated SQ handle are sent in the initial | |
1984 | * CMD IU sents on the exchange. All transfers relative to the io occur | |
1985 | * as part of the exchange. The CQE is the last thing for the io, | |
1986 | * which is transferred (explicitly or implicitly) with the RSP IU | |
1987 | * sent on the exchange. After the CQE is received, the FC exchange is | |
1988 | * terminaed and the Exchange may be used on a different io. | |
1989 | * | |
1990 | * The transport to LLDD api has the transport making a request for a | |
1991 | * new fcp io request to the LLDD. The LLDD then allocates a FC exchange | |
1992 | * resource and transfers the command. The LLDD will then process all | |
1993 | * steps to complete the io. Upon completion, the transport done routine | |
1994 | * is called. | |
1995 | * | |
1996 | * So - while the operation is outstanding to the LLDD, there is a link | |
1997 | * level FC exchange resource that is also outstanding. This must be | |
1998 | * considered in all cleanup operations. | |
1999 | */ | |
fc17b653 | 2000 | static blk_status_t |
e399441d JS |
2001 | nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, |
2002 | struct nvme_fc_fcp_op *op, u32 data_len, | |
2003 | enum nvmefc_fcp_datadir io_dir) | |
2004 | { | |
2005 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2006 | struct nvme_command *sqe = &cmdiu->sqe; | |
2007 | u32 csn; | |
2008 | int ret; | |
2009 | ||
61bff8ef JS |
2010 | /* |
2011 | * before attempting to send the io, check to see if we believe | |
2012 | * the target device is present | |
2013 | */ | |
2014 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) | |
8b25f351 | 2015 | goto busy; |
61bff8ef | 2016 | |
e399441d | 2017 | if (!nvme_fc_ctrl_get(ctrl)) |
fc17b653 | 2018 | return BLK_STS_IOERR; |
e399441d JS |
2019 | |
2020 | /* format the FC-NVME CMD IU and fcp_req */ | |
2021 | cmdiu->connection_id = cpu_to_be64(queue->connection_id); | |
2022 | csn = atomic_inc_return(&queue->csn); | |
2023 | cmdiu->csn = cpu_to_be32(csn); | |
2024 | cmdiu->data_len = cpu_to_be32(data_len); | |
2025 | switch (io_dir) { | |
2026 | case NVMEFC_FCP_WRITE: | |
2027 | cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; | |
2028 | break; | |
2029 | case NVMEFC_FCP_READ: | |
2030 | cmdiu->flags = FCNVME_CMD_FLAGS_READ; | |
2031 | break; | |
2032 | case NVMEFC_FCP_NODATA: | |
2033 | cmdiu->flags = 0; | |
2034 | break; | |
2035 | } | |
2036 | op->fcp_req.payload_length = data_len; | |
2037 | op->fcp_req.io_dir = io_dir; | |
2038 | op->fcp_req.transferred_length = 0; | |
2039 | op->fcp_req.rcv_rsplen = 0; | |
62eeacb0 | 2040 | op->fcp_req.status = NVME_SC_SUCCESS; |
e399441d JS |
2041 | op->fcp_req.sqid = cpu_to_le16(queue->qnum); |
2042 | ||
2043 | /* | |
2044 | * validate per fabric rules, set fields mandated by fabric spec | |
2045 | * as well as those by FC-NVME spec. | |
2046 | */ | |
2047 | WARN_ON_ONCE(sqe->common.metadata); | |
e399441d JS |
2048 | sqe->common.flags |= NVME_CMD_SGL_METABUF; |
2049 | ||
2050 | /* | |
d9d34c0b JS |
2051 | * format SQE DPTR field per FC-NVME rules: |
2052 | * type=0x5 Transport SGL Data Block Descriptor | |
2053 | * subtype=0xA Transport-specific value | |
2054 | * address=0 | |
2055 | * length=length of the data series | |
e399441d | 2056 | */ |
d9d34c0b JS |
2057 | sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | |
2058 | NVME_SGL_FMT_TRANSPORT_A; | |
e399441d JS |
2059 | sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); |
2060 | sqe->rw.dptr.sgl.addr = 0; | |
2061 | ||
78a7ac26 | 2062 | if (!(op->flags & FCOP_FLAGS_AEN)) { |
e399441d JS |
2063 | ret = nvme_fc_map_data(ctrl, op->rq, op); |
2064 | if (ret < 0) { | |
e399441d JS |
2065 | nvme_cleanup_cmd(op->rq); |
2066 | nvme_fc_ctrl_put(ctrl); | |
fc17b653 CH |
2067 | if (ret == -ENOMEM || ret == -EAGAIN) |
2068 | return BLK_STS_RESOURCE; | |
2069 | return BLK_STS_IOERR; | |
e399441d JS |
2070 | } |
2071 | } | |
2072 | ||
2073 | fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, | |
2074 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
2075 | ||
2076 | atomic_set(&op->state, FCPOP_STATE_ACTIVE); | |
2077 | ||
78a7ac26 | 2078 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d JS |
2079 | blk_mq_start_request(op->rq); |
2080 | ||
2081 | ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, | |
2082 | &ctrl->rport->remoteport, | |
2083 | queue->lldd_handle, &op->fcp_req); | |
2084 | ||
2085 | if (ret) { | |
8b25f351 | 2086 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d | 2087 | nvme_fc_unmap_data(ctrl, op->rq, op); |
e399441d JS |
2088 | |
2089 | nvme_fc_ctrl_put(ctrl); | |
2090 | ||
8b25f351 JS |
2091 | if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && |
2092 | ret != -EBUSY) | |
fc17b653 | 2093 | return BLK_STS_IOERR; |
e399441d | 2094 | |
8b25f351 | 2095 | goto busy; |
e399441d JS |
2096 | } |
2097 | ||
fc17b653 | 2098 | return BLK_STS_OK; |
8b25f351 JS |
2099 | |
2100 | busy: | |
2101 | if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx) | |
2102 | blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY); | |
2103 | ||
2104 | return BLK_STS_RESOURCE; | |
e399441d JS |
2105 | } |
2106 | ||
fc17b653 | 2107 | static blk_status_t |
e399441d JS |
2108 | nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, |
2109 | const struct blk_mq_queue_data *bd) | |
2110 | { | |
2111 | struct nvme_ns *ns = hctx->queue->queuedata; | |
2112 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2113 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2114 | struct request *rq = bd->rq; | |
2115 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2116 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2117 | struct nvme_command *sqe = &cmdiu->sqe; | |
2118 | enum nvmefc_fcp_datadir io_dir; | |
2119 | u32 data_len; | |
fc17b653 | 2120 | blk_status_t ret; |
e399441d JS |
2121 | |
2122 | ret = nvme_setup_cmd(ns, rq, sqe); | |
2123 | if (ret) | |
2124 | return ret; | |
2125 | ||
b131c61d | 2126 | data_len = blk_rq_payload_bytes(rq); |
e399441d JS |
2127 | if (data_len) |
2128 | io_dir = ((rq_data_dir(rq) == WRITE) ? | |
2129 | NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); | |
2130 | else | |
2131 | io_dir = NVMEFC_FCP_NODATA; | |
2132 | ||
2133 | return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); | |
2134 | } | |
2135 | ||
2136 | static struct blk_mq_tags * | |
2137 | nvme_fc_tagset(struct nvme_fc_queue *queue) | |
2138 | { | |
2139 | if (queue->qnum == 0) | |
2140 | return queue->ctrl->admin_tag_set.tags[queue->qnum]; | |
2141 | ||
2142 | return queue->ctrl->tag_set.tags[queue->qnum - 1]; | |
2143 | } | |
2144 | ||
2145 | static int | |
2146 | nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) | |
2147 | ||
2148 | { | |
2149 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2150 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2151 | struct request *req; | |
2152 | struct nvme_fc_fcp_op *op; | |
2153 | ||
2154 | req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); | |
61bff8ef | 2155 | if (!req) |
e399441d | 2156 | return 0; |
e399441d JS |
2157 | |
2158 | op = blk_mq_rq_to_pdu(req); | |
2159 | ||
2160 | if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && | |
2161 | (ctrl->lport->ops->poll_queue)) | |
2162 | ctrl->lport->ops->poll_queue(&ctrl->lport->localport, | |
2163 | queue->lldd_handle); | |
2164 | ||
2165 | return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); | |
2166 | } | |
2167 | ||
2168 | static void | |
2169 | nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx) | |
2170 | { | |
2171 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); | |
2172 | struct nvme_fc_fcp_op *aen_op; | |
61bff8ef JS |
2173 | unsigned long flags; |
2174 | bool terminating = false; | |
fc17b653 | 2175 | blk_status_t ret; |
e399441d JS |
2176 | |
2177 | if (aer_idx > NVME_FC_NR_AEN_COMMANDS) | |
2178 | return; | |
2179 | ||
61bff8ef JS |
2180 | spin_lock_irqsave(&ctrl->lock, flags); |
2181 | if (ctrl->flags & FCCTRL_TERMIO) | |
2182 | terminating = true; | |
2183 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2184 | ||
2185 | if (terminating) | |
2186 | return; | |
2187 | ||
e399441d JS |
2188 | aen_op = &ctrl->aen_ops[aer_idx]; |
2189 | ||
2190 | ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, | |
2191 | NVMEFC_FCP_NODATA); | |
2192 | if (ret) | |
2193 | dev_err(ctrl->ctrl.device, | |
2194 | "failed async event work [%d]\n", aer_idx); | |
2195 | } | |
2196 | ||
2197 | static void | |
78a7ac26 | 2198 | __nvme_fc_final_op_cleanup(struct request *rq) |
e399441d JS |
2199 | { |
2200 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2201 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
e399441d | 2202 | |
78a7ac26 JS |
2203 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
2204 | op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | | |
2205 | FCOP_FLAGS_COMPLETE); | |
e399441d | 2206 | |
e399441d | 2207 | nvme_fc_unmap_data(ctrl, rq, op); |
77f02a7a | 2208 | nvme_complete_rq(rq); |
e399441d JS |
2209 | nvme_fc_ctrl_put(ctrl); |
2210 | ||
e399441d JS |
2211 | } |
2212 | ||
78a7ac26 JS |
2213 | static void |
2214 | nvme_fc_complete_rq(struct request *rq) | |
2215 | { | |
2216 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2217 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
2218 | unsigned long flags; | |
2219 | bool completed = false; | |
2220 | ||
2221 | /* | |
2222 | * the core layer, on controller resets after calling | |
2223 | * nvme_shutdown_ctrl(), calls complete_rq without our | |
2224 | * calling blk_mq_complete_request(), thus there may still | |
2225 | * be live i/o outstanding with the LLDD. Means transport has | |
2226 | * to track complete calls vs fcpio_done calls to know what | |
2227 | * path to take on completes and dones. | |
2228 | */ | |
2229 | spin_lock_irqsave(&ctrl->lock, flags); | |
2230 | if (op->flags & FCOP_FLAGS_COMPLETE) | |
2231 | completed = true; | |
2232 | else | |
2233 | op->flags |= FCOP_FLAGS_RELEASED; | |
2234 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2235 | ||
2236 | if (completed) | |
2237 | __nvme_fc_final_op_cleanup(rq); | |
2238 | } | |
2239 | ||
e399441d JS |
2240 | /* |
2241 | * This routine is used by the transport when it needs to find active | |
2242 | * io on a queue that is to be terminated. The transport uses | |
2243 | * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke | |
2244 | * this routine to kill them on a 1 by 1 basis. | |
2245 | * | |
2246 | * As FC allocates FC exchange for each io, the transport must contact | |
2247 | * the LLDD to terminate the exchange, thus releasing the FC exchange. | |
2248 | * After terminating the exchange the LLDD will call the transport's | |
2249 | * normal io done path for the request, but it will have an aborted | |
2250 | * status. The done path will return the io request back to the block | |
2251 | * layer with an error status. | |
2252 | */ | |
2253 | static void | |
2254 | nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) | |
2255 | { | |
2256 | struct nvme_ctrl *nctrl = data; | |
2257 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2258 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); | |
78a7ac26 JS |
2259 | unsigned long flags; |
2260 | int status; | |
e399441d JS |
2261 | |
2262 | if (!blk_mq_request_started(req)) | |
2263 | return; | |
2264 | ||
78a7ac26 | 2265 | spin_lock_irqsave(&ctrl->lock, flags); |
61bff8ef JS |
2266 | if (ctrl->flags & FCCTRL_TERMIO) { |
2267 | ctrl->iocnt++; | |
2268 | op->flags |= FCOP_FLAGS_TERMIO; | |
2269 | } | |
78a7ac26 JS |
2270 | spin_unlock_irqrestore(&ctrl->lock, flags); |
2271 | ||
e399441d | 2272 | status = __nvme_fc_abort_op(ctrl, op); |
78a7ac26 JS |
2273 | if (status) { |
2274 | /* | |
2275 | * if __nvme_fc_abort_op failed the io wasn't | |
2276 | * active. Thus this call path is running in | |
2277 | * parallel to the io complete. Treat as non-error. | |
2278 | */ | |
2279 | ||
2280 | /* back out the flags/counters */ | |
2281 | spin_lock_irqsave(&ctrl->lock, flags); | |
61bff8ef JS |
2282 | if (ctrl->flags & FCCTRL_TERMIO) |
2283 | ctrl->iocnt--; | |
78a7ac26 JS |
2284 | op->flags &= ~FCOP_FLAGS_TERMIO; |
2285 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
e399441d | 2286 | return; |
78a7ac26 | 2287 | } |
e399441d JS |
2288 | } |
2289 | ||
78a7ac26 | 2290 | |
61bff8ef JS |
2291 | static const struct blk_mq_ops nvme_fc_mq_ops = { |
2292 | .queue_rq = nvme_fc_queue_rq, | |
2293 | .complete = nvme_fc_complete_rq, | |
2294 | .init_request = nvme_fc_init_request, | |
2295 | .exit_request = nvme_fc_exit_request, | |
61bff8ef JS |
2296 | .init_hctx = nvme_fc_init_hctx, |
2297 | .poll = nvme_fc_poll, | |
2298 | .timeout = nvme_fc_timeout, | |
2299 | }; | |
e399441d | 2300 | |
61bff8ef JS |
2301 | static int |
2302 | nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) | |
e399441d | 2303 | { |
61bff8ef | 2304 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; |
7314183d | 2305 | unsigned int nr_io_queues; |
61bff8ef | 2306 | int ret; |
e399441d | 2307 | |
7314183d SG |
2308 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2309 | ctrl->lport->ops->max_hw_queues); | |
2310 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
61bff8ef JS |
2311 | if (ret) { |
2312 | dev_info(ctrl->ctrl.device, | |
2313 | "set_queue_count failed: %d\n", ret); | |
2314 | return ret; | |
2315 | } | |
e399441d | 2316 | |
7314183d SG |
2317 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
2318 | if (!nr_io_queues) | |
61bff8ef | 2319 | return 0; |
e399441d | 2320 | |
61bff8ef | 2321 | nvme_fc_init_io_queues(ctrl); |
e399441d | 2322 | |
61bff8ef JS |
2323 | memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); |
2324 | ctrl->tag_set.ops = &nvme_fc_mq_ops; | |
2325 | ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; | |
2326 | ctrl->tag_set.reserved_tags = 1; /* fabric connect */ | |
2327 | ctrl->tag_set.numa_node = NUMA_NO_NODE; | |
2328 | ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; | |
2329 | ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
2330 | (SG_CHUNK_SIZE * | |
2331 | sizeof(struct scatterlist)) + | |
2332 | ctrl->lport->ops->fcprqst_priv_sz; | |
2333 | ctrl->tag_set.driver_data = ctrl; | |
d858e5f0 | 2334 | ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; |
61bff8ef | 2335 | ctrl->tag_set.timeout = NVME_IO_TIMEOUT; |
e399441d | 2336 | |
61bff8ef JS |
2337 | ret = blk_mq_alloc_tag_set(&ctrl->tag_set); |
2338 | if (ret) | |
2339 | return ret; | |
e399441d | 2340 | |
61bff8ef | 2341 | ctrl->ctrl.tagset = &ctrl->tag_set; |
e399441d | 2342 | |
61bff8ef JS |
2343 | ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); |
2344 | if (IS_ERR(ctrl->ctrl.connect_q)) { | |
2345 | ret = PTR_ERR(ctrl->ctrl.connect_q); | |
2346 | goto out_free_tag_set; | |
2347 | } | |
e399441d | 2348 | |
61bff8ef | 2349 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
e399441d | 2350 | if (ret) |
61bff8ef | 2351 | goto out_cleanup_blk_queue; |
e399441d | 2352 | |
61bff8ef JS |
2353 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); |
2354 | if (ret) | |
2355 | goto out_delete_hw_queues; | |
e399441d JS |
2356 | |
2357 | return 0; | |
e399441d | 2358 | |
61bff8ef JS |
2359 | out_delete_hw_queues: |
2360 | nvme_fc_delete_hw_io_queues(ctrl); | |
2361 | out_cleanup_blk_queue: | |
61bff8ef JS |
2362 | blk_cleanup_queue(ctrl->ctrl.connect_q); |
2363 | out_free_tag_set: | |
2364 | blk_mq_free_tag_set(&ctrl->tag_set); | |
2365 | nvme_fc_free_io_queues(ctrl); | |
e399441d | 2366 | |
61bff8ef JS |
2367 | /* force put free routine to ignore io queues */ |
2368 | ctrl->ctrl.tagset = NULL; | |
2369 | ||
2370 | return ret; | |
2371 | } | |
e399441d JS |
2372 | |
2373 | static int | |
61bff8ef | 2374 | nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
2375 | { |
2376 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
7314183d | 2377 | unsigned int nr_io_queues; |
e399441d JS |
2378 | int ret; |
2379 | ||
7314183d SG |
2380 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2381 | ctrl->lport->ops->max_hw_queues); | |
2382 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
e399441d JS |
2383 | if (ret) { |
2384 | dev_info(ctrl->ctrl.device, | |
2385 | "set_queue_count failed: %d\n", ret); | |
2386 | return ret; | |
2387 | } | |
2388 | ||
7314183d | 2389 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
61bff8ef | 2390 | /* check for io queues existing */ |
d858e5f0 | 2391 | if (ctrl->ctrl.queue_count == 1) |
e399441d JS |
2392 | return 0; |
2393 | ||
e399441d JS |
2394 | nvme_fc_init_io_queues(ctrl); |
2395 | ||
d352ae20 | 2396 | ret = blk_mq_reinit_tagset(&ctrl->tag_set, nvme_fc_reinit_request); |
e399441d | 2397 | if (ret) |
61bff8ef | 2398 | goto out_free_io_queues; |
e399441d JS |
2399 | |
2400 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2401 | if (ret) | |
61bff8ef | 2402 | goto out_free_io_queues; |
e399441d JS |
2403 | |
2404 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); | |
2405 | if (ret) | |
2406 | goto out_delete_hw_queues; | |
2407 | ||
cda5fd1a SG |
2408 | blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); |
2409 | ||
e399441d JS |
2410 | return 0; |
2411 | ||
2412 | out_delete_hw_queues: | |
2413 | nvme_fc_delete_hw_io_queues(ctrl); | |
61bff8ef | 2414 | out_free_io_queues: |
e399441d | 2415 | nvme_fc_free_io_queues(ctrl); |
61bff8ef JS |
2416 | return ret; |
2417 | } | |
e399441d | 2418 | |
61bff8ef JS |
2419 | /* |
2420 | * This routine restarts the controller on the host side, and | |
2421 | * on the link side, recreates the controller association. | |
2422 | */ | |
2423 | static int | |
2424 | nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) | |
2425 | { | |
2426 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
2427 | u32 segs; | |
2428 | int ret; | |
2429 | bool changed; | |
2430 | ||
fdf9dfa8 | 2431 | ++ctrl->ctrl.nr_reconnects; |
61bff8ef JS |
2432 | |
2433 | /* | |
2434 | * Create the admin queue | |
2435 | */ | |
2436 | ||
2437 | nvme_fc_init_queue(ctrl, 0, NVME_FC_AQ_BLKMQ_DEPTH); | |
2438 | ||
2439 | ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, | |
2440 | NVME_FC_AQ_BLKMQ_DEPTH); | |
2441 | if (ret) | |
2442 | goto out_free_queue; | |
2443 | ||
2444 | ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], | |
2445 | NVME_FC_AQ_BLKMQ_DEPTH, | |
2446 | (NVME_FC_AQ_BLKMQ_DEPTH / 4)); | |
2447 | if (ret) | |
2448 | goto out_delete_hw_queue; | |
2449 | ||
2450 | if (ctrl->ctrl.state != NVME_CTRL_NEW) | |
f9c5af5f | 2451 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2452 | |
2453 | ret = nvmf_connect_admin_queue(&ctrl->ctrl); | |
2454 | if (ret) | |
2455 | goto out_disconnect_admin_queue; | |
2456 | ||
2457 | /* | |
2458 | * Check controller capabilities | |
2459 | * | |
2460 | * todo:- add code to check if ctrl attributes changed from | |
2461 | * prior connection values | |
2462 | */ | |
2463 | ||
20d0dfe6 | 2464 | ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); |
61bff8ef JS |
2465 | if (ret) { |
2466 | dev_err(ctrl->ctrl.device, | |
2467 | "prop_get NVME_REG_CAP failed\n"); | |
2468 | goto out_disconnect_admin_queue; | |
2469 | } | |
2470 | ||
2471 | ctrl->ctrl.sqsize = | |
20d0dfe6 | 2472 | min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap) + 1, ctrl->ctrl.sqsize); |
61bff8ef | 2473 | |
20d0dfe6 | 2474 | ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); |
61bff8ef JS |
2475 | if (ret) |
2476 | goto out_disconnect_admin_queue; | |
2477 | ||
2478 | segs = min_t(u32, NVME_FC_MAX_SEGMENTS, | |
2479 | ctrl->lport->ops->max_sgl_segments); | |
2480 | ctrl->ctrl.max_hw_sectors = (segs - 1) << (PAGE_SHIFT - 9); | |
2481 | ||
2482 | ret = nvme_init_identify(&ctrl->ctrl); | |
2483 | if (ret) | |
2484 | goto out_disconnect_admin_queue; | |
2485 | ||
2486 | /* sanity checks */ | |
2487 | ||
2488 | /* FC-NVME does not have other data in the capsule */ | |
2489 | if (ctrl->ctrl.icdoff) { | |
2490 | dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", | |
2491 | ctrl->ctrl.icdoff); | |
2492 | goto out_disconnect_admin_queue; | |
2493 | } | |
2494 | ||
61bff8ef JS |
2495 | /* FC-NVME supports normal SGL Data Block Descriptors */ |
2496 | ||
2497 | if (opts->queue_size > ctrl->ctrl.maxcmd) { | |
2498 | /* warn if maxcmd is lower than queue_size */ | |
2499 | dev_warn(ctrl->ctrl.device, | |
2500 | "queue_size %zu > ctrl maxcmd %u, reducing " | |
2501 | "to queue_size\n", | |
2502 | opts->queue_size, ctrl->ctrl.maxcmd); | |
2503 | opts->queue_size = ctrl->ctrl.maxcmd; | |
2504 | } | |
2505 | ||
2506 | ret = nvme_fc_init_aen_ops(ctrl); | |
2507 | if (ret) | |
2508 | goto out_term_aen_ops; | |
2509 | ||
2510 | /* | |
2511 | * Create the io queues | |
2512 | */ | |
2513 | ||
d858e5f0 | 2514 | if (ctrl->ctrl.queue_count > 1) { |
61bff8ef JS |
2515 | if (ctrl->ctrl.state == NVME_CTRL_NEW) |
2516 | ret = nvme_fc_create_io_queues(ctrl); | |
2517 | else | |
2518 | ret = nvme_fc_reinit_io_queues(ctrl); | |
2519 | if (ret) | |
2520 | goto out_term_aen_ops; | |
2521 | } | |
2522 | ||
2523 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
2524 | WARN_ON_ONCE(!changed); | |
2525 | ||
fdf9dfa8 | 2526 | ctrl->ctrl.nr_reconnects = 0; |
61bff8ef | 2527 | |
d09f2b45 | 2528 | nvme_start_ctrl(&ctrl->ctrl); |
61bff8ef JS |
2529 | |
2530 | return 0; /* Success */ | |
2531 | ||
2532 | out_term_aen_ops: | |
2533 | nvme_fc_term_aen_ops(ctrl); | |
61bff8ef JS |
2534 | out_disconnect_admin_queue: |
2535 | /* send a Disconnect(association) LS to fc-nvme target */ | |
2536 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2537 | out_delete_hw_queue: | |
2538 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2539 | out_free_queue: | |
2540 | nvme_fc_free_queue(&ctrl->queues[0]); | |
e399441d JS |
2541 | |
2542 | return ret; | |
2543 | } | |
2544 | ||
61bff8ef JS |
2545 | /* |
2546 | * This routine stops operation of the controller on the host side. | |
2547 | * On the host os stack side: Admin and IO queues are stopped, | |
2548 | * outstanding ios on them terminated via FC ABTS. | |
2549 | * On the link side: the association is terminated. | |
2550 | */ | |
2551 | static void | |
2552 | nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) | |
2553 | { | |
2554 | unsigned long flags; | |
2555 | ||
61bff8ef JS |
2556 | spin_lock_irqsave(&ctrl->lock, flags); |
2557 | ctrl->flags |= FCCTRL_TERMIO; | |
2558 | ctrl->iocnt = 0; | |
2559 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2560 | ||
2561 | /* | |
2562 | * If io queues are present, stop them and terminate all outstanding | |
2563 | * ios on them. As FC allocates FC exchange for each io, the | |
2564 | * transport must contact the LLDD to terminate the exchange, | |
2565 | * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() | |
2566 | * to tell us what io's are busy and invoke a transport routine | |
2567 | * to kill them with the LLDD. After terminating the exchange | |
2568 | * the LLDD will call the transport's normal io done path, but it | |
2569 | * will have an aborted status. The done path will return the | |
2570 | * io requests back to the block layer as part of normal completions | |
2571 | * (but with error status). | |
2572 | */ | |
d858e5f0 | 2573 | if (ctrl->ctrl.queue_count > 1) { |
61bff8ef JS |
2574 | nvme_stop_queues(&ctrl->ctrl); |
2575 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
2576 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2577 | } | |
2578 | ||
2579 | /* | |
2580 | * Other transports, which don't have link-level contexts bound | |
2581 | * to sqe's, would try to gracefully shutdown the controller by | |
2582 | * writing the registers for shutdown and polling (call | |
2583 | * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially | |
2584 | * just aborted and we will wait on those contexts, and given | |
2585 | * there was no indication of how live the controlelr is on the | |
2586 | * link, don't send more io to create more contexts for the | |
2587 | * shutdown. Let the controller fail via keepalive failure if | |
2588 | * its still present. | |
2589 | */ | |
2590 | ||
2591 | /* | |
2592 | * clean up the admin queue. Same thing as above. | |
2593 | * use blk_mq_tagset_busy_itr() and the transport routine to | |
2594 | * terminate the exchanges. | |
2595 | */ | |
f9c5af5f | 2596 | blk_mq_quiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2597 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, |
2598 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2599 | ||
2600 | /* kill the aens as they are a separate path */ | |
2601 | nvme_fc_abort_aen_ops(ctrl); | |
2602 | ||
2603 | /* wait for all io that had to be aborted */ | |
2604 | spin_lock_irqsave(&ctrl->lock, flags); | |
36715cf4 | 2605 | wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); |
61bff8ef JS |
2606 | ctrl->flags &= ~FCCTRL_TERMIO; |
2607 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2608 | ||
2609 | nvme_fc_term_aen_ops(ctrl); | |
2610 | ||
2611 | /* | |
2612 | * send a Disconnect(association) LS to fc-nvme target | |
2613 | * Note: could have been sent at top of process, but | |
2614 | * cleaner on link traffic if after the aborts complete. | |
2615 | * Note: if association doesn't exist, association_id will be 0 | |
2616 | */ | |
2617 | if (ctrl->association_id) | |
2618 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2619 | ||
2620 | if (ctrl->ctrl.tagset) { | |
2621 | nvme_fc_delete_hw_io_queues(ctrl); | |
2622 | nvme_fc_free_io_queues(ctrl); | |
2623 | } | |
2624 | ||
2625 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2626 | nvme_fc_free_queue(&ctrl->queues[0]); | |
2627 | } | |
2628 | ||
2629 | static void | |
2630 | nvme_fc_delete_ctrl_work(struct work_struct *work) | |
2631 | { | |
2632 | struct nvme_fc_ctrl *ctrl = | |
2633 | container_of(work, struct nvme_fc_ctrl, delete_work); | |
2634 | ||
d86c4d8e | 2635 | cancel_work_sync(&ctrl->ctrl.reset_work); |
61bff8ef | 2636 | cancel_delayed_work_sync(&ctrl->connect_work); |
d09f2b45 SG |
2637 | nvme_stop_ctrl(&ctrl->ctrl); |
2638 | nvme_remove_namespaces(&ctrl->ctrl); | |
61bff8ef JS |
2639 | /* |
2640 | * kill the association on the link side. this will block | |
2641 | * waiting for io to terminate | |
2642 | */ | |
2643 | nvme_fc_delete_association(ctrl); | |
2644 | ||
2645 | /* | |
2646 | * tear down the controller | |
a5321aa5 JS |
2647 | * After the last reference on the nvme ctrl is removed, |
2648 | * the transport nvme_fc_nvme_ctrl_freed() callback will be | |
2649 | * invoked. From there, the transport will tear down it's | |
2650 | * logical queues and association. | |
61bff8ef JS |
2651 | */ |
2652 | nvme_uninit_ctrl(&ctrl->ctrl); | |
2653 | ||
2654 | nvme_put_ctrl(&ctrl->ctrl); | |
2655 | } | |
2656 | ||
5bbecdbc JS |
2657 | static bool |
2658 | __nvme_fc_schedule_delete_work(struct nvme_fc_ctrl *ctrl) | |
61bff8ef JS |
2659 | { |
2660 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) | |
5bbecdbc | 2661 | return true; |
61bff8ef | 2662 | |
9a6327d2 | 2663 | if (!queue_work(nvme_wq, &ctrl->delete_work)) |
5bbecdbc | 2664 | return true; |
61bff8ef | 2665 | |
5bbecdbc JS |
2666 | return false; |
2667 | } | |
2668 | ||
2669 | static int | |
2670 | __nvme_fc_del_ctrl(struct nvme_fc_ctrl *ctrl) | |
2671 | { | |
2672 | return __nvme_fc_schedule_delete_work(ctrl) ? -EBUSY : 0; | |
61bff8ef JS |
2673 | } |
2674 | ||
2675 | /* | |
2676 | * Request from nvme core layer to delete the controller | |
2677 | */ | |
2678 | static int | |
2679 | nvme_fc_del_nvme_ctrl(struct nvme_ctrl *nctrl) | |
2680 | { | |
2681 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2682 | int ret; | |
2683 | ||
2684 | if (!kref_get_unless_zero(&ctrl->ctrl.kref)) | |
2685 | return -EBUSY; | |
2686 | ||
2687 | ret = __nvme_fc_del_ctrl(ctrl); | |
2688 | ||
2689 | if (!ret) | |
9a6327d2 | 2690 | flush_workqueue(nvme_wq); |
61bff8ef JS |
2691 | |
2692 | nvme_put_ctrl(&ctrl->ctrl); | |
2693 | ||
2694 | return ret; | |
2695 | } | |
2696 | ||
5bbecdbc JS |
2697 | static void |
2698 | nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) | |
2699 | { | |
2700 | /* If we are resetting/deleting then do nothing */ | |
2701 | if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) { | |
2702 | WARN_ON_ONCE(ctrl->ctrl.state == NVME_CTRL_NEW || | |
2703 | ctrl->ctrl.state == NVME_CTRL_LIVE); | |
2704 | return; | |
2705 | } | |
2706 | ||
589ff775 | 2707 | dev_info(ctrl->ctrl.device, |
5bbecdbc JS |
2708 | "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", |
2709 | ctrl->cnum, status); | |
2710 | ||
2711 | if (nvmf_should_reconnect(&ctrl->ctrl)) { | |
2712 | dev_info(ctrl->ctrl.device, | |
2713 | "NVME-FC{%d}: Reconnect attempt in %d seconds.\n", | |
2714 | ctrl->cnum, ctrl->ctrl.opts->reconnect_delay); | |
9a6327d2 | 2715 | queue_delayed_work(nvme_wq, &ctrl->connect_work, |
5bbecdbc JS |
2716 | ctrl->ctrl.opts->reconnect_delay * HZ); |
2717 | } else { | |
589ff775 | 2718 | dev_warn(ctrl->ctrl.device, |
5bbecdbc JS |
2719 | "NVME-FC{%d}: Max reconnect attempts (%d) " |
2720 | "reached. Removing controller\n", | |
fdf9dfa8 | 2721 | ctrl->cnum, ctrl->ctrl.nr_reconnects); |
5bbecdbc JS |
2722 | WARN_ON(__nvme_fc_schedule_delete_work(ctrl)); |
2723 | } | |
2724 | } | |
2725 | ||
61bff8ef JS |
2726 | static void |
2727 | nvme_fc_reset_ctrl_work(struct work_struct *work) | |
2728 | { | |
2729 | struct nvme_fc_ctrl *ctrl = | |
d86c4d8e | 2730 | container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); |
61bff8ef JS |
2731 | int ret; |
2732 | ||
d09f2b45 | 2733 | nvme_stop_ctrl(&ctrl->ctrl); |
61bff8ef JS |
2734 | /* will block will waiting for io to terminate */ |
2735 | nvme_fc_delete_association(ctrl); | |
2736 | ||
2737 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
2738 | if (ret) |
2739 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2740 | else | |
61bff8ef JS |
2741 | dev_info(ctrl->ctrl.device, |
2742 | "NVME-FC{%d}: controller reset complete\n", ctrl->cnum); | |
2743 | } | |
2744 | ||
61bff8ef JS |
2745 | static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { |
2746 | .name = "fc", | |
2747 | .module = THIS_MODULE, | |
d3d5b87d | 2748 | .flags = NVME_F_FABRICS, |
61bff8ef JS |
2749 | .reg_read32 = nvmf_reg_read32, |
2750 | .reg_read64 = nvmf_reg_read64, | |
2751 | .reg_write32 = nvmf_reg_write32, | |
61bff8ef JS |
2752 | .free_ctrl = nvme_fc_nvme_ctrl_freed, |
2753 | .submit_async_event = nvme_fc_submit_async_event, | |
2754 | .delete_ctrl = nvme_fc_del_nvme_ctrl, | |
61bff8ef JS |
2755 | .get_address = nvmf_get_address, |
2756 | }; | |
2757 | ||
2758 | static void | |
2759 | nvme_fc_connect_ctrl_work(struct work_struct *work) | |
2760 | { | |
2761 | int ret; | |
2762 | ||
2763 | struct nvme_fc_ctrl *ctrl = | |
2764 | container_of(to_delayed_work(work), | |
2765 | struct nvme_fc_ctrl, connect_work); | |
2766 | ||
2767 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
2768 | if (ret) |
2769 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2770 | else | |
61bff8ef JS |
2771 | dev_info(ctrl->ctrl.device, |
2772 | "NVME-FC{%d}: controller reconnect complete\n", | |
2773 | ctrl->cnum); | |
2774 | } | |
2775 | ||
2776 | ||
2777 | static const struct blk_mq_ops nvme_fc_admin_mq_ops = { | |
2778 | .queue_rq = nvme_fc_queue_rq, | |
2779 | .complete = nvme_fc_complete_rq, | |
76f983cb | 2780 | .init_request = nvme_fc_init_request, |
61bff8ef | 2781 | .exit_request = nvme_fc_exit_request, |
61bff8ef JS |
2782 | .init_hctx = nvme_fc_init_admin_hctx, |
2783 | .timeout = nvme_fc_timeout, | |
2784 | }; | |
2785 | ||
e399441d JS |
2786 | |
2787 | static struct nvme_ctrl * | |
61bff8ef | 2788 | nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, |
e399441d JS |
2789 | struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) |
2790 | { | |
2791 | struct nvme_fc_ctrl *ctrl; | |
2792 | unsigned long flags; | |
2793 | int ret, idx; | |
e399441d | 2794 | |
85e6a6ad JS |
2795 | if (!(rport->remoteport.port_role & |
2796 | (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { | |
2797 | ret = -EBADR; | |
2798 | goto out_fail; | |
2799 | } | |
2800 | ||
e399441d JS |
2801 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
2802 | if (!ctrl) { | |
2803 | ret = -ENOMEM; | |
2804 | goto out_fail; | |
2805 | } | |
2806 | ||
2807 | idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); | |
2808 | if (idx < 0) { | |
2809 | ret = -ENOSPC; | |
2810 | goto out_free_ctrl; | |
2811 | } | |
2812 | ||
2813 | ctrl->ctrl.opts = opts; | |
2814 | INIT_LIST_HEAD(&ctrl->ctrl_list); | |
e399441d JS |
2815 | ctrl->lport = lport; |
2816 | ctrl->rport = rport; | |
2817 | ctrl->dev = lport->dev; | |
e399441d JS |
2818 | ctrl->cnum = idx; |
2819 | ||
e399441d JS |
2820 | get_device(ctrl->dev); |
2821 | kref_init(&ctrl->ref); | |
2822 | ||
61bff8ef | 2823 | INIT_WORK(&ctrl->delete_work, nvme_fc_delete_ctrl_work); |
d86c4d8e | 2824 | INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); |
61bff8ef | 2825 | INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); |
e399441d JS |
2826 | spin_lock_init(&ctrl->lock); |
2827 | ||
2828 | /* io queue count */ | |
d858e5f0 | 2829 | ctrl->ctrl.queue_count = min_t(unsigned int, |
e399441d JS |
2830 | opts->nr_io_queues, |
2831 | lport->ops->max_hw_queues); | |
d858e5f0 | 2832 | ctrl->ctrl.queue_count++; /* +1 for admin queue */ |
e399441d JS |
2833 | |
2834 | ctrl->ctrl.sqsize = opts->queue_size - 1; | |
2835 | ctrl->ctrl.kato = opts->kato; | |
2836 | ||
2837 | ret = -ENOMEM; | |
d858e5f0 SG |
2838 | ctrl->queues = kcalloc(ctrl->ctrl.queue_count, |
2839 | sizeof(struct nvme_fc_queue), GFP_KERNEL); | |
e399441d | 2840 | if (!ctrl->queues) |
61bff8ef | 2841 | goto out_free_ida; |
e399441d | 2842 | |
61bff8ef JS |
2843 | memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); |
2844 | ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; | |
2845 | ctrl->admin_tag_set.queue_depth = NVME_FC_AQ_BLKMQ_DEPTH; | |
2846 | ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ | |
2847 | ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; | |
2848 | ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + | |
2849 | (SG_CHUNK_SIZE * | |
2850 | sizeof(struct scatterlist)) + | |
2851 | ctrl->lport->ops->fcprqst_priv_sz; | |
2852 | ctrl->admin_tag_set.driver_data = ctrl; | |
2853 | ctrl->admin_tag_set.nr_hw_queues = 1; | |
2854 | ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; | |
e399441d | 2855 | |
61bff8ef | 2856 | ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); |
e399441d | 2857 | if (ret) |
61bff8ef | 2858 | goto out_free_queues; |
34b6c231 | 2859 | ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; |
e399441d | 2860 | |
61bff8ef JS |
2861 | ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); |
2862 | if (IS_ERR(ctrl->ctrl.admin_q)) { | |
2863 | ret = PTR_ERR(ctrl->ctrl.admin_q); | |
2864 | goto out_free_admin_tag_set; | |
e399441d JS |
2865 | } |
2866 | ||
61bff8ef JS |
2867 | /* |
2868 | * Would have been nice to init io queues tag set as well. | |
2869 | * However, we require interaction from the controller | |
2870 | * for max io queue count before we can do so. | |
2871 | * Defer this to the connect path. | |
2872 | */ | |
e399441d | 2873 | |
61bff8ef JS |
2874 | ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); |
2875 | if (ret) | |
2876 | goto out_cleanup_admin_q; | |
e399441d | 2877 | |
61bff8ef | 2878 | /* at this point, teardown path changes to ref counting on nvme ctrl */ |
e399441d JS |
2879 | |
2880 | spin_lock_irqsave(&rport->lock, flags); | |
2881 | list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); | |
2882 | spin_unlock_irqrestore(&rport->lock, flags); | |
2883 | ||
61bff8ef JS |
2884 | ret = nvme_fc_create_association(ctrl); |
2885 | if (ret) { | |
de41447a | 2886 | ctrl->ctrl.opts = NULL; |
61bff8ef JS |
2887 | /* initiate nvme ctrl ref counting teardown */ |
2888 | nvme_uninit_ctrl(&ctrl->ctrl); | |
24b7f059 | 2889 | nvme_put_ctrl(&ctrl->ctrl); |
61bff8ef | 2890 | |
0b5a7669 JS |
2891 | /* Remove core ctrl ref. */ |
2892 | nvme_put_ctrl(&ctrl->ctrl); | |
2893 | ||
61bff8ef JS |
2894 | /* as we're past the point where we transition to the ref |
2895 | * counting teardown path, if we return a bad pointer here, | |
2896 | * the calling routine, thinking it's prior to the | |
2897 | * transition, will do an rport put. Since the teardown | |
2898 | * path also does a rport put, we do an extra get here to | |
2899 | * so proper order/teardown happens. | |
2900 | */ | |
2901 | nvme_fc_rport_get(rport); | |
2902 | ||
2903 | if (ret > 0) | |
2904 | ret = -EIO; | |
2905 | return ERR_PTR(ret); | |
e399441d JS |
2906 | } |
2907 | ||
2cb657bc JS |
2908 | kref_get(&ctrl->ctrl.kref); |
2909 | ||
61bff8ef JS |
2910 | dev_info(ctrl->ctrl.device, |
2911 | "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", | |
2912 | ctrl->cnum, ctrl->ctrl.opts->subsysnqn); | |
e399441d | 2913 | |
61bff8ef | 2914 | return &ctrl->ctrl; |
e399441d | 2915 | |
61bff8ef JS |
2916 | out_cleanup_admin_q: |
2917 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
2918 | out_free_admin_tag_set: | |
2919 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
2920 | out_free_queues: | |
2921 | kfree(ctrl->queues); | |
e399441d | 2922 | out_free_ida: |
61bff8ef | 2923 | put_device(ctrl->dev); |
e399441d JS |
2924 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
2925 | out_free_ctrl: | |
2926 | kfree(ctrl); | |
2927 | out_fail: | |
e399441d JS |
2928 | /* exit via here doesn't follow ctlr ref points */ |
2929 | return ERR_PTR(ret); | |
2930 | } | |
2931 | ||
e399441d JS |
2932 | |
2933 | struct nvmet_fc_traddr { | |
2934 | u64 nn; | |
2935 | u64 pn; | |
2936 | }; | |
2937 | ||
e399441d | 2938 | static int |
9c5358e1 | 2939 | __nvme_fc_parse_u64(substring_t *sstr, u64 *val) |
e399441d | 2940 | { |
e399441d JS |
2941 | u64 token64; |
2942 | ||
9c5358e1 JS |
2943 | if (match_u64(sstr, &token64)) |
2944 | return -EINVAL; | |
2945 | *val = token64; | |
e399441d | 2946 | |
9c5358e1 JS |
2947 | return 0; |
2948 | } | |
e399441d | 2949 | |
9c5358e1 JS |
2950 | /* |
2951 | * This routine validates and extracts the WWN's from the TRADDR string. | |
2952 | * As kernel parsers need the 0x to determine number base, universally | |
2953 | * build string to parse with 0x prefix before parsing name strings. | |
2954 | */ | |
2955 | static int | |
2956 | nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) | |
2957 | { | |
2958 | char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; | |
2959 | substring_t wwn = { name, &name[sizeof(name)-1] }; | |
2960 | int nnoffset, pnoffset; | |
2961 | ||
2962 | /* validate it string one of the 2 allowed formats */ | |
2963 | if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && | |
2964 | !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && | |
2965 | !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], | |
2966 | "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { | |
2967 | nnoffset = NVME_FC_TRADDR_OXNNLEN; | |
2968 | pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + | |
2969 | NVME_FC_TRADDR_OXNNLEN; | |
2970 | } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && | |
2971 | !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && | |
2972 | !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], | |
2973 | "pn-", NVME_FC_TRADDR_NNLEN))) { | |
2974 | nnoffset = NVME_FC_TRADDR_NNLEN; | |
2975 | pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; | |
2976 | } else | |
2977 | goto out_einval; | |
e399441d | 2978 | |
9c5358e1 JS |
2979 | name[0] = '0'; |
2980 | name[1] = 'x'; | |
2981 | name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; | |
2982 | ||
2983 | memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
2984 | if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) | |
2985 | goto out_einval; | |
2986 | ||
2987 | memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
2988 | if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) | |
2989 | goto out_einval; | |
2990 | ||
2991 | return 0; | |
2992 | ||
2993 | out_einval: | |
2994 | pr_warn("%s: bad traddr string\n", __func__); | |
2995 | return -EINVAL; | |
e399441d JS |
2996 | } |
2997 | ||
2998 | static struct nvme_ctrl * | |
2999 | nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) | |
3000 | { | |
3001 | struct nvme_fc_lport *lport; | |
3002 | struct nvme_fc_rport *rport; | |
61bff8ef | 3003 | struct nvme_ctrl *ctrl; |
e399441d JS |
3004 | struct nvmet_fc_traddr laddr = { 0L, 0L }; |
3005 | struct nvmet_fc_traddr raddr = { 0L, 0L }; | |
3006 | unsigned long flags; | |
3007 | int ret; | |
3008 | ||
9c5358e1 | 3009 | ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3010 | if (ret || !raddr.nn || !raddr.pn) |
3011 | return ERR_PTR(-EINVAL); | |
3012 | ||
9c5358e1 | 3013 | ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3014 | if (ret || !laddr.nn || !laddr.pn) |
3015 | return ERR_PTR(-EINVAL); | |
3016 | ||
3017 | /* find the host and remote ports to connect together */ | |
3018 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
3019 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
3020 | if (lport->localport.node_name != laddr.nn || | |
3021 | lport->localport.port_name != laddr.pn) | |
3022 | continue; | |
3023 | ||
3024 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
3025 | if (rport->remoteport.node_name != raddr.nn || | |
3026 | rport->remoteport.port_name != raddr.pn) | |
3027 | continue; | |
3028 | ||
3029 | /* if fail to get reference fall through. Will error */ | |
3030 | if (!nvme_fc_rport_get(rport)) | |
3031 | break; | |
3032 | ||
3033 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3034 | ||
61bff8ef JS |
3035 | ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); |
3036 | if (IS_ERR(ctrl)) | |
3037 | nvme_fc_rport_put(rport); | |
3038 | return ctrl; | |
e399441d JS |
3039 | } |
3040 | } | |
3041 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3042 | ||
3043 | return ERR_PTR(-ENOENT); | |
3044 | } | |
3045 | ||
3046 | ||
3047 | static struct nvmf_transport_ops nvme_fc_transport = { | |
3048 | .name = "fc", | |
3049 | .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, | |
5bbecdbc | 3050 | .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, |
e399441d JS |
3051 | .create_ctrl = nvme_fc_create_ctrl, |
3052 | }; | |
3053 | ||
3054 | static int __init nvme_fc_init_module(void) | |
3055 | { | |
5f568556 JS |
3056 | int ret; |
3057 | ||
3058 | /* | |
3059 | * NOTE: | |
3060 | * It is expected that in the future the kernel will combine | |
3061 | * the FC-isms that are currently under scsi and now being | |
3062 | * added to by NVME into a new standalone FC class. The SCSI | |
3063 | * and NVME protocols and their devices would be under this | |
3064 | * new FC class. | |
3065 | * | |
3066 | * As we need something to post FC-specific udev events to, | |
3067 | * specifically for nvme probe events, start by creating the | |
3068 | * new device class. When the new standalone FC class is | |
3069 | * put in place, this code will move to a more generic | |
3070 | * location for the class. | |
3071 | */ | |
3072 | fc_class = class_create(THIS_MODULE, "fc"); | |
3073 | if (IS_ERR(fc_class)) { | |
3074 | pr_err("couldn't register class fc\n"); | |
3075 | return PTR_ERR(fc_class); | |
3076 | } | |
3077 | ||
3078 | /* | |
3079 | * Create a device for the FC-centric udev events | |
3080 | */ | |
3081 | fc_udev_device = device_create(fc_class, NULL, MKDEV(0, 0), NULL, | |
3082 | "fc_udev_device"); | |
3083 | if (IS_ERR(fc_udev_device)) { | |
3084 | pr_err("couldn't create fc_udev device!\n"); | |
3085 | ret = PTR_ERR(fc_udev_device); | |
3086 | goto out_destroy_class; | |
3087 | } | |
3088 | ||
3089 | ret = nvmf_register_transport(&nvme_fc_transport); | |
3090 | if (ret) | |
3091 | goto out_destroy_device; | |
3092 | ||
3093 | return 0; | |
3094 | ||
3095 | out_destroy_device: | |
3096 | device_destroy(fc_class, MKDEV(0, 0)); | |
3097 | out_destroy_class: | |
3098 | class_destroy(fc_class); | |
3099 | return ret; | |
e399441d JS |
3100 | } |
3101 | ||
3102 | static void __exit nvme_fc_exit_module(void) | |
3103 | { | |
3104 | /* sanity check - all lports should be removed */ | |
3105 | if (!list_empty(&nvme_fc_lport_list)) | |
3106 | pr_warn("%s: localport list not empty\n", __func__); | |
3107 | ||
3108 | nvmf_unregister_transport(&nvme_fc_transport); | |
3109 | ||
e399441d JS |
3110 | ida_destroy(&nvme_fc_local_port_cnt); |
3111 | ida_destroy(&nvme_fc_ctrl_cnt); | |
5f568556 JS |
3112 | |
3113 | device_destroy(fc_class, MKDEV(0, 0)); | |
3114 | class_destroy(fc_class); | |
e399441d JS |
3115 | } |
3116 | ||
3117 | module_init(nvme_fc_init_module); | |
3118 | module_exit(nvme_fc_exit_module); | |
3119 | ||
3120 | MODULE_LICENSE("GPL v2"); |