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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> |
d3d0bc78 | 23 | #include <linux/overflow.h> |
e399441d JS |
24 | |
25 | #include "nvme.h" | |
26 | #include "fabrics.h" | |
27 | #include <linux/nvme-fc-driver.h> | |
28 | #include <linux/nvme-fc.h> | |
29 | ||
30 | ||
31 | /* *************************** Data Structures/Defines ****************** */ | |
32 | ||
33 | ||
e399441d | 34 | enum nvme_fc_queue_flags { |
26c0a26d JA |
35 | NVME_FC_Q_CONNECTED = 0, |
36 | NVME_FC_Q_LIVE, | |
e399441d JS |
37 | }; |
38 | ||
ac7fe82b JS |
39 | #define NVME_FC_DEFAULT_DEV_LOSS_TMO 60 /* seconds */ |
40 | ||
e399441d JS |
41 | struct nvme_fc_queue { |
42 | struct nvme_fc_ctrl *ctrl; | |
43 | struct device *dev; | |
44 | struct blk_mq_hw_ctx *hctx; | |
45 | void *lldd_handle; | |
e399441d JS |
46 | size_t cmnd_capsule_len; |
47 | u32 qnum; | |
48 | u32 rqcnt; | |
49 | u32 seqno; | |
50 | ||
51 | u64 connection_id; | |
52 | atomic_t csn; | |
53 | ||
54 | unsigned long flags; | |
55 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ | |
56 | ||
8d64daf7 JS |
57 | enum nvme_fcop_flags { |
58 | FCOP_FLAGS_TERMIO = (1 << 0), | |
c3aedd22 | 59 | FCOP_FLAGS_AEN = (1 << 1), |
8d64daf7 JS |
60 | }; |
61 | ||
e399441d JS |
62 | struct nvmefc_ls_req_op { |
63 | struct nvmefc_ls_req ls_req; | |
64 | ||
c913a8b0 | 65 | struct nvme_fc_rport *rport; |
e399441d JS |
66 | struct nvme_fc_queue *queue; |
67 | struct request *rq; | |
8d64daf7 | 68 | u32 flags; |
e399441d JS |
69 | |
70 | int ls_error; | |
71 | struct completion ls_done; | |
c913a8b0 | 72 | struct list_head lsreq_list; /* rport->ls_req_list */ |
e399441d JS |
73 | bool req_queued; |
74 | }; | |
75 | ||
76 | enum nvme_fcpop_state { | |
77 | FCPOP_STATE_UNINIT = 0, | |
78 | FCPOP_STATE_IDLE = 1, | |
79 | FCPOP_STATE_ACTIVE = 2, | |
80 | FCPOP_STATE_ABORTED = 3, | |
78a7ac26 | 81 | FCPOP_STATE_COMPLETE = 4, |
e399441d JS |
82 | }; |
83 | ||
84 | struct nvme_fc_fcp_op { | |
85 | struct nvme_request nreq; /* | |
86 | * nvme/host/core.c | |
87 | * requires this to be | |
88 | * the 1st element in the | |
89 | * private structure | |
90 | * associated with the | |
91 | * request. | |
92 | */ | |
93 | struct nvmefc_fcp_req fcp_req; | |
94 | ||
95 | struct nvme_fc_ctrl *ctrl; | |
96 | struct nvme_fc_queue *queue; | |
97 | struct request *rq; | |
98 | ||
99 | atomic_t state; | |
78a7ac26 | 100 | u32 flags; |
e399441d JS |
101 | u32 rqno; |
102 | u32 nents; | |
103 | ||
104 | struct nvme_fc_cmd_iu cmd_iu; | |
105 | struct nvme_fc_ersp_iu rsp_iu; | |
106 | }; | |
107 | ||
d3d0bc78 BVA |
108 | struct nvme_fcp_op_w_sgl { |
109 | struct nvme_fc_fcp_op op; | |
110 | struct scatterlist sgl[SG_CHUNK_SIZE]; | |
111 | uint8_t priv[0]; | |
112 | }; | |
113 | ||
e399441d JS |
114 | struct nvme_fc_lport { |
115 | struct nvme_fc_local_port localport; | |
116 | ||
117 | struct ida endp_cnt; | |
118 | struct list_head port_list; /* nvme_fc_port_list */ | |
119 | struct list_head endp_list; | |
120 | struct device *dev; /* physical device for dma */ | |
121 | struct nvme_fc_port_template *ops; | |
122 | struct kref ref; | |
158bfb88 | 123 | atomic_t act_rport_cnt; |
e399441d JS |
124 | } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ |
125 | ||
126 | struct nvme_fc_rport { | |
127 | struct nvme_fc_remote_port remoteport; | |
128 | ||
129 | struct list_head endp_list; /* for lport->endp_list */ | |
130 | struct list_head ctrl_list; | |
c913a8b0 | 131 | struct list_head ls_req_list; |
97faec53 | 132 | struct list_head disc_list; |
c913a8b0 JS |
133 | struct device *dev; /* physical device for dma */ |
134 | struct nvme_fc_lport *lport; | |
e399441d JS |
135 | spinlock_t lock; |
136 | struct kref ref; | |
158bfb88 | 137 | atomic_t act_ctrl_cnt; |
2b632970 | 138 | unsigned long dev_loss_end; |
e399441d JS |
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 | ||
4c984154 | 153 | bool ioq_live; |
158bfb88 | 154 | bool assoc_active; |
4cff280a | 155 | atomic_t err_work_active; |
e399441d JS |
156 | u64 association_id; |
157 | ||
e399441d | 158 | struct list_head ctrl_list; /* rport->ctrl_list */ |
e399441d JS |
159 | |
160 | struct blk_mq_tag_set admin_tag_set; | |
161 | struct blk_mq_tag_set tag_set; | |
162 | ||
61bff8ef | 163 | struct delayed_work connect_work; |
4cff280a | 164 | struct work_struct err_work; |
61bff8ef | 165 | |
e399441d | 166 | struct kref ref; |
61bff8ef JS |
167 | u32 flags; |
168 | u32 iocnt; | |
36715cf4 | 169 | wait_queue_head_t ioabort_wait; |
e399441d | 170 | |
38dabe21 | 171 | struct nvme_fc_fcp_op aen_ops[NVME_NR_AEN_COMMANDS]; |
e399441d JS |
172 | |
173 | struct nvme_ctrl ctrl; | |
174 | }; | |
175 | ||
176 | static inline struct nvme_fc_ctrl * | |
177 | to_fc_ctrl(struct nvme_ctrl *ctrl) | |
178 | { | |
179 | return container_of(ctrl, struct nvme_fc_ctrl, ctrl); | |
180 | } | |
181 | ||
182 | static inline struct nvme_fc_lport * | |
183 | localport_to_lport(struct nvme_fc_local_port *portptr) | |
184 | { | |
185 | return container_of(portptr, struct nvme_fc_lport, localport); | |
186 | } | |
187 | ||
188 | static inline struct nvme_fc_rport * | |
189 | remoteport_to_rport(struct nvme_fc_remote_port *portptr) | |
190 | { | |
191 | return container_of(portptr, struct nvme_fc_rport, remoteport); | |
192 | } | |
193 | ||
194 | static inline struct nvmefc_ls_req_op * | |
195 | ls_req_to_lsop(struct nvmefc_ls_req *lsreq) | |
196 | { | |
197 | return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); | |
198 | } | |
199 | ||
200 | static inline struct nvme_fc_fcp_op * | |
201 | fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) | |
202 | { | |
203 | return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); | |
204 | } | |
205 | ||
206 | ||
207 | ||
208 | /* *************************** Globals **************************** */ | |
209 | ||
210 | ||
211 | static DEFINE_SPINLOCK(nvme_fc_lock); | |
212 | ||
213 | static LIST_HEAD(nvme_fc_lport_list); | |
214 | static DEFINE_IDA(nvme_fc_local_port_cnt); | |
215 | static DEFINE_IDA(nvme_fc_ctrl_cnt); | |
216 | ||
e399441d JS |
217 | |
218 | ||
5f568556 JS |
219 | /* |
220 | * These items are short-term. They will eventually be moved into | |
221 | * a generic FC class. See comments in module init. | |
222 | */ | |
5f568556 JS |
223 | static struct device *fc_udev_device; |
224 | ||
e399441d JS |
225 | |
226 | /* *********************** FC-NVME Port Management ************************ */ | |
227 | ||
e399441d JS |
228 | static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, |
229 | struct nvme_fc_queue *, unsigned int); | |
230 | ||
5533d424 JS |
231 | static void |
232 | nvme_fc_free_lport(struct kref *ref) | |
233 | { | |
234 | struct nvme_fc_lport *lport = | |
235 | container_of(ref, struct nvme_fc_lport, ref); | |
236 | unsigned long flags; | |
237 | ||
238 | WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); | |
239 | WARN_ON(!list_empty(&lport->endp_list)); | |
240 | ||
241 | /* remove from transport list */ | |
242 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
243 | list_del(&lport->port_list); | |
244 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
245 | ||
5533d424 JS |
246 | ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); |
247 | ida_destroy(&lport->endp_cnt); | |
248 | ||
249 | put_device(lport->dev); | |
250 | ||
251 | kfree(lport); | |
252 | } | |
253 | ||
254 | static void | |
255 | nvme_fc_lport_put(struct nvme_fc_lport *lport) | |
256 | { | |
257 | kref_put(&lport->ref, nvme_fc_free_lport); | |
258 | } | |
259 | ||
260 | static int | |
261 | nvme_fc_lport_get(struct nvme_fc_lport *lport) | |
262 | { | |
263 | return kref_get_unless_zero(&lport->ref); | |
264 | } | |
265 | ||
266 | ||
267 | static struct nvme_fc_lport * | |
c5760f30 JS |
268 | nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo, |
269 | struct nvme_fc_port_template *ops, | |
270 | struct device *dev) | |
5533d424 JS |
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 | ||
c5760f30 JS |
282 | if (lport->dev != dev) { |
283 | lport = ERR_PTR(-EXDEV); | |
284 | goto out_done; | |
285 | } | |
286 | ||
5533d424 JS |
287 | if (lport->localport.port_state != FC_OBJSTATE_DELETED) { |
288 | lport = ERR_PTR(-EEXIST); | |
289 | goto out_done; | |
290 | } | |
291 | ||
292 | if (!nvme_fc_lport_get(lport)) { | |
293 | /* | |
294 | * fails if ref cnt already 0. If so, | |
295 | * act as if lport already deleted | |
296 | */ | |
297 | lport = NULL; | |
298 | goto out_done; | |
299 | } | |
300 | ||
301 | /* resume the lport */ | |
302 | ||
c5760f30 | 303 | lport->ops = ops; |
5533d424 JS |
304 | lport->localport.port_role = pinfo->port_role; |
305 | lport->localport.port_id = pinfo->port_id; | |
306 | lport->localport.port_state = FC_OBJSTATE_ONLINE; | |
307 | ||
308 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
309 | ||
310 | return lport; | |
311 | } | |
312 | ||
313 | lport = NULL; | |
314 | ||
315 | out_done: | |
316 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
317 | ||
318 | return lport; | |
319 | } | |
e399441d JS |
320 | |
321 | /** | |
322 | * nvme_fc_register_localport - transport entry point called by an | |
323 | * LLDD to register the existence of a NVME | |
324 | * host FC port. | |
325 | * @pinfo: pointer to information about the port to be registered | |
326 | * @template: LLDD entrypoints and operational parameters for the port | |
327 | * @dev: physical hardware device node port corresponds to. Will be | |
328 | * used for DMA mappings | |
76c910c7 | 329 | * @portptr: pointer to a local port pointer. Upon success, the routine |
e399441d JS |
330 | * will allocate a nvme_fc_local_port structure and place its |
331 | * address in the local port pointer. Upon failure, local port | |
332 | * pointer will be set to 0. | |
333 | * | |
334 | * Returns: | |
335 | * a completion status. Must be 0 upon success; a negative errno | |
336 | * (ex: -ENXIO) upon failure. | |
337 | */ | |
338 | int | |
339 | nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, | |
340 | struct nvme_fc_port_template *template, | |
341 | struct device *dev, | |
342 | struct nvme_fc_local_port **portptr) | |
343 | { | |
344 | struct nvme_fc_lport *newrec; | |
345 | unsigned long flags; | |
346 | int ret, idx; | |
347 | ||
348 | if (!template->localport_delete || !template->remoteport_delete || | |
349 | !template->ls_req || !template->fcp_io || | |
350 | !template->ls_abort || !template->fcp_abort || | |
351 | !template->max_hw_queues || !template->max_sgl_segments || | |
352 | !template->max_dif_sgl_segments || !template->dma_boundary) { | |
353 | ret = -EINVAL; | |
354 | goto out_reghost_failed; | |
355 | } | |
356 | ||
5533d424 JS |
357 | /* |
358 | * look to see if there is already a localport that had been | |
359 | * deregistered and in the process of waiting for all the | |
360 | * references to fully be removed. If the references haven't | |
361 | * expired, we can simply re-enable the localport. Remoteports | |
362 | * and controller reconnections should resume naturally. | |
363 | */ | |
c5760f30 | 364 | newrec = nvme_fc_attach_to_unreg_lport(pinfo, template, dev); |
5533d424 JS |
365 | |
366 | /* found an lport, but something about its state is bad */ | |
367 | if (IS_ERR(newrec)) { | |
368 | ret = PTR_ERR(newrec); | |
369 | goto out_reghost_failed; | |
370 | ||
371 | /* found existing lport, which was resumed */ | |
372 | } else if (newrec) { | |
373 | *portptr = &newrec->localport; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* nothing found - allocate a new localport struct */ | |
378 | ||
e399441d JS |
379 | newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), |
380 | GFP_KERNEL); | |
381 | if (!newrec) { | |
382 | ret = -ENOMEM; | |
383 | goto out_reghost_failed; | |
384 | } | |
385 | ||
386 | idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); | |
387 | if (idx < 0) { | |
388 | ret = -ENOSPC; | |
389 | goto out_fail_kfree; | |
390 | } | |
391 | ||
392 | if (!get_device(dev) && dev) { | |
393 | ret = -ENODEV; | |
394 | goto out_ida_put; | |
395 | } | |
396 | ||
397 | INIT_LIST_HEAD(&newrec->port_list); | |
398 | INIT_LIST_HEAD(&newrec->endp_list); | |
399 | kref_init(&newrec->ref); | |
158bfb88 | 400 | atomic_set(&newrec->act_rport_cnt, 0); |
e399441d JS |
401 | newrec->ops = template; |
402 | newrec->dev = dev; | |
403 | ida_init(&newrec->endp_cnt); | |
404 | newrec->localport.private = &newrec[1]; | |
405 | newrec->localport.node_name = pinfo->node_name; | |
406 | newrec->localport.port_name = pinfo->port_name; | |
407 | newrec->localport.port_role = pinfo->port_role; | |
408 | newrec->localport.port_id = pinfo->port_id; | |
409 | newrec->localport.port_state = FC_OBJSTATE_ONLINE; | |
410 | newrec->localport.port_num = idx; | |
411 | ||
412 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
413 | list_add_tail(&newrec->port_list, &nvme_fc_lport_list); | |
414 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
415 | ||
416 | if (dev) | |
417 | dma_set_seg_boundary(dev, template->dma_boundary); | |
418 | ||
419 | *portptr = &newrec->localport; | |
420 | return 0; | |
421 | ||
422 | out_ida_put: | |
423 | ida_simple_remove(&nvme_fc_local_port_cnt, idx); | |
424 | out_fail_kfree: | |
425 | kfree(newrec); | |
426 | out_reghost_failed: | |
427 | *portptr = NULL; | |
428 | ||
429 | return ret; | |
430 | } | |
431 | EXPORT_SYMBOL_GPL(nvme_fc_register_localport); | |
432 | ||
e399441d JS |
433 | /** |
434 | * nvme_fc_unregister_localport - transport entry point called by an | |
435 | * LLDD to deregister/remove a previously | |
436 | * registered a NVME host FC port. | |
76c910c7 | 437 | * @portptr: pointer to the (registered) local port that is to be deregistered. |
e399441d JS |
438 | * |
439 | * Returns: | |
440 | * a completion status. Must be 0 upon success; a negative errno | |
441 | * (ex: -ENXIO) upon failure. | |
442 | */ | |
443 | int | |
444 | nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) | |
445 | { | |
446 | struct nvme_fc_lport *lport = localport_to_lport(portptr); | |
447 | unsigned long flags; | |
448 | ||
449 | if (!portptr) | |
450 | return -EINVAL; | |
451 | ||
452 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
453 | ||
454 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
455 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
456 | return -EINVAL; | |
457 | } | |
458 | portptr->port_state = FC_OBJSTATE_DELETED; | |
459 | ||
460 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
461 | ||
158bfb88 JS |
462 | if (atomic_read(&lport->act_rport_cnt) == 0) |
463 | lport->ops->localport_delete(&lport->localport); | |
464 | ||
e399441d JS |
465 | nvme_fc_lport_put(lport); |
466 | ||
467 | return 0; | |
468 | } | |
469 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); | |
470 | ||
eaefd5ab JS |
471 | /* |
472 | * TRADDR strings, per FC-NVME are fixed format: | |
473 | * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters | |
474 | * udev event will only differ by prefix of what field is | |
475 | * being specified: | |
476 | * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters | |
477 | * 19 + 43 + null_fudge = 64 characters | |
478 | */ | |
479 | #define FCNVME_TRADDR_LENGTH 64 | |
480 | ||
481 | static void | |
482 | nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, | |
483 | struct nvme_fc_rport *rport) | |
484 | { | |
485 | char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ | |
486 | char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ | |
487 | char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; | |
488 | ||
489 | if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) | |
490 | return; | |
491 | ||
492 | snprintf(hostaddr, sizeof(hostaddr), | |
493 | "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
494 | lport->localport.node_name, lport->localport.port_name); | |
495 | snprintf(tgtaddr, sizeof(tgtaddr), | |
496 | "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", | |
497 | rport->remoteport.node_name, rport->remoteport.port_name); | |
498 | kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); | |
499 | } | |
500 | ||
469d0ef0 JS |
501 | static void |
502 | nvme_fc_free_rport(struct kref *ref) | |
503 | { | |
504 | struct nvme_fc_rport *rport = | |
505 | container_of(ref, struct nvme_fc_rport, ref); | |
506 | struct nvme_fc_lport *lport = | |
507 | localport_to_lport(rport->remoteport.localport); | |
508 | unsigned long flags; | |
509 | ||
510 | WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); | |
511 | WARN_ON(!list_empty(&rport->ctrl_list)); | |
512 | ||
513 | /* remove from lport list */ | |
514 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
515 | list_del(&rport->endp_list); | |
516 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
517 | ||
97faec53 | 518 | WARN_ON(!list_empty(&rport->disc_list)); |
469d0ef0 JS |
519 | ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); |
520 | ||
521 | kfree(rport); | |
522 | ||
523 | nvme_fc_lport_put(lport); | |
524 | } | |
525 | ||
526 | static void | |
527 | nvme_fc_rport_put(struct nvme_fc_rport *rport) | |
528 | { | |
529 | kref_put(&rport->ref, nvme_fc_free_rport); | |
530 | } | |
531 | ||
532 | static int | |
533 | nvme_fc_rport_get(struct nvme_fc_rport *rport) | |
534 | { | |
535 | return kref_get_unless_zero(&rport->ref); | |
536 | } | |
537 | ||
2b632970 JS |
538 | static void |
539 | nvme_fc_resume_controller(struct nvme_fc_ctrl *ctrl) | |
540 | { | |
541 | switch (ctrl->ctrl.state) { | |
542 | case NVME_CTRL_NEW: | |
ad6a0a52 | 543 | case NVME_CTRL_CONNECTING: |
2b632970 JS |
544 | /* |
545 | * As all reconnects were suppressed, schedule a | |
546 | * connect. | |
547 | */ | |
548 | dev_info(ctrl->ctrl.device, | |
549 | "NVME-FC{%d}: connectivity re-established. " | |
550 | "Attempting reconnect\n", ctrl->cnum); | |
551 | ||
552 | queue_delayed_work(nvme_wq, &ctrl->connect_work, 0); | |
553 | break; | |
554 | ||
555 | case NVME_CTRL_RESETTING: | |
556 | /* | |
557 | * Controller is already in the process of terminating the | |
558 | * association. No need to do anything further. The reconnect | |
559 | * step will naturally occur after the reset completes. | |
560 | */ | |
561 | break; | |
562 | ||
563 | default: | |
564 | /* no action to take - let it delete */ | |
565 | break; | |
566 | } | |
567 | } | |
568 | ||
569 | static struct nvme_fc_rport * | |
570 | nvme_fc_attach_to_suspended_rport(struct nvme_fc_lport *lport, | |
571 | struct nvme_fc_port_info *pinfo) | |
572 | { | |
573 | struct nvme_fc_rport *rport; | |
574 | struct nvme_fc_ctrl *ctrl; | |
575 | unsigned long flags; | |
576 | ||
577 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
578 | ||
579 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
580 | if (rport->remoteport.node_name != pinfo->node_name || | |
581 | rport->remoteport.port_name != pinfo->port_name) | |
582 | continue; | |
583 | ||
584 | if (!nvme_fc_rport_get(rport)) { | |
585 | rport = ERR_PTR(-ENOLCK); | |
586 | goto out_done; | |
587 | } | |
588 | ||
589 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
590 | ||
591 | spin_lock_irqsave(&rport->lock, flags); | |
592 | ||
593 | /* has it been unregistered */ | |
594 | if (rport->remoteport.port_state != FC_OBJSTATE_DELETED) { | |
595 | /* means lldd called us twice */ | |
596 | spin_unlock_irqrestore(&rport->lock, flags); | |
597 | nvme_fc_rport_put(rport); | |
598 | return ERR_PTR(-ESTALE); | |
599 | } | |
600 | ||
0cdd5fca JS |
601 | rport->remoteport.port_role = pinfo->port_role; |
602 | rport->remoteport.port_id = pinfo->port_id; | |
2b632970 JS |
603 | rport->remoteport.port_state = FC_OBJSTATE_ONLINE; |
604 | rport->dev_loss_end = 0; | |
605 | ||
606 | /* | |
607 | * kick off a reconnect attempt on all associations to the | |
608 | * remote port. A successful reconnects will resume i/o. | |
609 | */ | |
610 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) | |
611 | nvme_fc_resume_controller(ctrl); | |
612 | ||
613 | spin_unlock_irqrestore(&rport->lock, flags); | |
614 | ||
615 | return rport; | |
616 | } | |
617 | ||
618 | rport = NULL; | |
619 | ||
620 | out_done: | |
621 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
622 | ||
623 | return rport; | |
624 | } | |
625 | ||
626 | static inline void | |
627 | __nvme_fc_set_dev_loss_tmo(struct nvme_fc_rport *rport, | |
628 | struct nvme_fc_port_info *pinfo) | |
629 | { | |
630 | if (pinfo->dev_loss_tmo) | |
631 | rport->remoteport.dev_loss_tmo = pinfo->dev_loss_tmo; | |
632 | else | |
633 | rport->remoteport.dev_loss_tmo = NVME_FC_DEFAULT_DEV_LOSS_TMO; | |
634 | } | |
635 | ||
e399441d JS |
636 | /** |
637 | * nvme_fc_register_remoteport - transport entry point called by an | |
638 | * LLDD to register the existence of a NVME | |
639 | * subsystem FC port on its fabric. | |
640 | * @localport: pointer to the (registered) local port that the remote | |
641 | * subsystem port is connected to. | |
642 | * @pinfo: pointer to information about the port to be registered | |
76c910c7 | 643 | * @portptr: pointer to a remote port pointer. Upon success, the routine |
e399441d JS |
644 | * will allocate a nvme_fc_remote_port structure and place its |
645 | * address in the remote port pointer. Upon failure, remote port | |
646 | * pointer will be set to 0. | |
647 | * | |
648 | * Returns: | |
649 | * a completion status. Must be 0 upon success; a negative errno | |
650 | * (ex: -ENXIO) upon failure. | |
651 | */ | |
652 | int | |
653 | nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, | |
654 | struct nvme_fc_port_info *pinfo, | |
655 | struct nvme_fc_remote_port **portptr) | |
656 | { | |
657 | struct nvme_fc_lport *lport = localport_to_lport(localport); | |
658 | struct nvme_fc_rport *newrec; | |
659 | unsigned long flags; | |
660 | int ret, idx; | |
661 | ||
2b632970 JS |
662 | if (!nvme_fc_lport_get(lport)) { |
663 | ret = -ESHUTDOWN; | |
664 | goto out_reghost_failed; | |
665 | } | |
666 | ||
667 | /* | |
668 | * look to see if there is already a remoteport that is waiting | |
669 | * for a reconnect (within dev_loss_tmo) with the same WWN's. | |
670 | * If so, transition to it and reconnect. | |
671 | */ | |
672 | newrec = nvme_fc_attach_to_suspended_rport(lport, pinfo); | |
673 | ||
674 | /* found an rport, but something about its state is bad */ | |
675 | if (IS_ERR(newrec)) { | |
676 | ret = PTR_ERR(newrec); | |
677 | goto out_lport_put; | |
678 | ||
679 | /* found existing rport, which was resumed */ | |
680 | } else if (newrec) { | |
681 | nvme_fc_lport_put(lport); | |
682 | __nvme_fc_set_dev_loss_tmo(newrec, pinfo); | |
683 | nvme_fc_signal_discovery_scan(lport, newrec); | |
684 | *portptr = &newrec->remoteport; | |
685 | return 0; | |
686 | } | |
687 | ||
688 | /* nothing found - allocate a new remoteport struct */ | |
689 | ||
e399441d JS |
690 | newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), |
691 | GFP_KERNEL); | |
692 | if (!newrec) { | |
693 | ret = -ENOMEM; | |
2b632970 | 694 | goto out_lport_put; |
e399441d JS |
695 | } |
696 | ||
697 | idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); | |
698 | if (idx < 0) { | |
699 | ret = -ENOSPC; | |
2b632970 | 700 | goto out_kfree_rport; |
e399441d JS |
701 | } |
702 | ||
703 | INIT_LIST_HEAD(&newrec->endp_list); | |
704 | INIT_LIST_HEAD(&newrec->ctrl_list); | |
c913a8b0 | 705 | INIT_LIST_HEAD(&newrec->ls_req_list); |
97faec53 | 706 | INIT_LIST_HEAD(&newrec->disc_list); |
e399441d | 707 | kref_init(&newrec->ref); |
158bfb88 | 708 | atomic_set(&newrec->act_ctrl_cnt, 0); |
e399441d JS |
709 | spin_lock_init(&newrec->lock); |
710 | newrec->remoteport.localport = &lport->localport; | |
c913a8b0 JS |
711 | newrec->dev = lport->dev; |
712 | newrec->lport = lport; | |
e399441d JS |
713 | newrec->remoteport.private = &newrec[1]; |
714 | newrec->remoteport.port_role = pinfo->port_role; | |
715 | newrec->remoteport.node_name = pinfo->node_name; | |
716 | newrec->remoteport.port_name = pinfo->port_name; | |
717 | newrec->remoteport.port_id = pinfo->port_id; | |
718 | newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; | |
719 | newrec->remoteport.port_num = idx; | |
2b632970 | 720 | __nvme_fc_set_dev_loss_tmo(newrec, pinfo); |
e399441d JS |
721 | |
722 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
723 | list_add_tail(&newrec->endp_list, &lport->endp_list); | |
724 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
725 | ||
eaefd5ab JS |
726 | nvme_fc_signal_discovery_scan(lport, newrec); |
727 | ||
e399441d JS |
728 | *portptr = &newrec->remoteport; |
729 | return 0; | |
730 | ||
e399441d JS |
731 | out_kfree_rport: |
732 | kfree(newrec); | |
2b632970 JS |
733 | out_lport_put: |
734 | nvme_fc_lport_put(lport); | |
e399441d JS |
735 | out_reghost_failed: |
736 | *portptr = NULL; | |
737 | return ret; | |
e399441d JS |
738 | } |
739 | EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); | |
740 | ||
8d64daf7 JS |
741 | static int |
742 | nvme_fc_abort_lsops(struct nvme_fc_rport *rport) | |
743 | { | |
744 | struct nvmefc_ls_req_op *lsop; | |
745 | unsigned long flags; | |
746 | ||
747 | restart: | |
748 | spin_lock_irqsave(&rport->lock, flags); | |
749 | ||
750 | list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { | |
751 | if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { | |
752 | lsop->flags |= FCOP_FLAGS_TERMIO; | |
753 | spin_unlock_irqrestore(&rport->lock, flags); | |
754 | rport->lport->ops->ls_abort(&rport->lport->localport, | |
755 | &rport->remoteport, | |
756 | &lsop->ls_req); | |
757 | goto restart; | |
758 | } | |
759 | } | |
760 | spin_unlock_irqrestore(&rport->lock, flags); | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
2b632970 JS |
765 | static void |
766 | nvme_fc_ctrl_connectivity_loss(struct nvme_fc_ctrl *ctrl) | |
767 | { | |
768 | dev_info(ctrl->ctrl.device, | |
769 | "NVME-FC{%d}: controller connectivity lost. Awaiting " | |
770 | "Reconnect", ctrl->cnum); | |
771 | ||
772 | switch (ctrl->ctrl.state) { | |
773 | case NVME_CTRL_NEW: | |
774 | case NVME_CTRL_LIVE: | |
775 | /* | |
776 | * Schedule a controller reset. The reset will terminate the | |
777 | * association and schedule the reconnect timer. Reconnects | |
778 | * will be attempted until either the ctlr_loss_tmo | |
779 | * (max_retries * connect_delay) expires or the remoteport's | |
780 | * dev_loss_tmo expires. | |
781 | */ | |
782 | if (nvme_reset_ctrl(&ctrl->ctrl)) { | |
783 | dev_warn(ctrl->ctrl.device, | |
77d0612d | 784 | "NVME-FC{%d}: Couldn't schedule reset.\n", |
2b632970 JS |
785 | ctrl->cnum); |
786 | nvme_delete_ctrl(&ctrl->ctrl); | |
787 | } | |
788 | break; | |
789 | ||
ad6a0a52 | 790 | case NVME_CTRL_CONNECTING: |
2b632970 JS |
791 | /* |
792 | * The association has already been terminated and the | |
793 | * controller is attempting reconnects. No need to do anything | |
794 | * futher. Reconnects will be attempted until either the | |
795 | * ctlr_loss_tmo (max_retries * connect_delay) expires or the | |
796 | * remoteport's dev_loss_tmo expires. | |
797 | */ | |
798 | break; | |
799 | ||
800 | case NVME_CTRL_RESETTING: | |
801 | /* | |
802 | * Controller is already in the process of terminating the | |
803 | * association. No need to do anything further. The reconnect | |
804 | * step will kick in naturally after the association is | |
805 | * terminated. | |
806 | */ | |
807 | break; | |
808 | ||
809 | case NVME_CTRL_DELETING: | |
810 | default: | |
811 | /* no action to take - let it delete */ | |
812 | break; | |
813 | } | |
814 | } | |
815 | ||
e399441d JS |
816 | /** |
817 | * nvme_fc_unregister_remoteport - transport entry point called by an | |
818 | * LLDD to deregister/remove a previously | |
819 | * registered a NVME subsystem FC port. | |
76c910c7 BVA |
820 | * @portptr: pointer to the (registered) remote port that is to be |
821 | * deregistered. | |
e399441d JS |
822 | * |
823 | * Returns: | |
824 | * a completion status. Must be 0 upon success; a negative errno | |
825 | * (ex: -ENXIO) upon failure. | |
826 | */ | |
827 | int | |
828 | nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) | |
829 | { | |
830 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
831 | struct nvme_fc_ctrl *ctrl; | |
832 | unsigned long flags; | |
833 | ||
834 | if (!portptr) | |
835 | return -EINVAL; | |
836 | ||
837 | spin_lock_irqsave(&rport->lock, flags); | |
838 | ||
839 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
840 | spin_unlock_irqrestore(&rport->lock, flags); | |
841 | return -EINVAL; | |
842 | } | |
843 | portptr->port_state = FC_OBJSTATE_DELETED; | |
844 | ||
2b632970 JS |
845 | rport->dev_loss_end = jiffies + (portptr->dev_loss_tmo * HZ); |
846 | ||
847 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { | |
848 | /* if dev_loss_tmo==0, dev loss is immediate */ | |
849 | if (!portptr->dev_loss_tmo) { | |
850 | dev_warn(ctrl->ctrl.device, | |
77d0612d | 851 | "NVME-FC{%d}: controller connectivity lost.\n", |
2b632970 JS |
852 | ctrl->cnum); |
853 | nvme_delete_ctrl(&ctrl->ctrl); | |
854 | } else | |
855 | nvme_fc_ctrl_connectivity_loss(ctrl); | |
856 | } | |
e399441d JS |
857 | |
858 | spin_unlock_irqrestore(&rport->lock, flags); | |
859 | ||
8d64daf7 JS |
860 | nvme_fc_abort_lsops(rport); |
861 | ||
158bfb88 JS |
862 | if (atomic_read(&rport->act_ctrl_cnt) == 0) |
863 | rport->lport->ops->remoteport_delete(portptr); | |
864 | ||
2b632970 JS |
865 | /* |
866 | * release the reference, which will allow, if all controllers | |
867 | * go away, which should only occur after dev_loss_tmo occurs, | |
868 | * for the rport to be torn down. | |
869 | */ | |
e399441d | 870 | nvme_fc_rport_put(rport); |
2b632970 | 871 | |
e399441d JS |
872 | return 0; |
873 | } | |
874 | EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); | |
875 | ||
eaefd5ab JS |
876 | /** |
877 | * nvme_fc_rescan_remoteport - transport entry point called by an | |
878 | * LLDD to request a nvme device rescan. | |
879 | * @remoteport: pointer to the (registered) remote port that is to be | |
880 | * rescanned. | |
881 | * | |
882 | * Returns: N/A | |
883 | */ | |
884 | void | |
885 | nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) | |
886 | { | |
887 | struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); | |
888 | ||
889 | nvme_fc_signal_discovery_scan(rport->lport, rport); | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); | |
892 | ||
ac7fe82b JS |
893 | int |
894 | nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *portptr, | |
895 | u32 dev_loss_tmo) | |
896 | { | |
897 | struct nvme_fc_rport *rport = remoteport_to_rport(portptr); | |
ac7fe82b JS |
898 | unsigned long flags; |
899 | ||
900 | spin_lock_irqsave(&rport->lock, flags); | |
901 | ||
902 | if (portptr->port_state != FC_OBJSTATE_ONLINE) { | |
903 | spin_unlock_irqrestore(&rport->lock, flags); | |
904 | return -EINVAL; | |
905 | } | |
906 | ||
907 | /* a dev_loss_tmo of 0 (immediate) is allowed to be set */ | |
908 | rport->remoteport.dev_loss_tmo = dev_loss_tmo; | |
909 | ||
910 | spin_unlock_irqrestore(&rport->lock, flags); | |
911 | ||
912 | return 0; | |
913 | } | |
914 | EXPORT_SYMBOL_GPL(nvme_fc_set_remoteport_devloss); | |
915 | ||
e399441d JS |
916 | |
917 | /* *********************** FC-NVME DMA Handling **************************** */ | |
918 | ||
919 | /* | |
920 | * The fcloop device passes in a NULL device pointer. Real LLD's will | |
921 | * pass in a valid device pointer. If NULL is passed to the dma mapping | |
922 | * routines, depending on the platform, it may or may not succeed, and | |
923 | * may crash. | |
924 | * | |
925 | * As such: | |
926 | * Wrapper all the dma routines and check the dev pointer. | |
927 | * | |
928 | * If simple mappings (return just a dma address, we'll noop them, | |
929 | * returning a dma address of 0. | |
930 | * | |
931 | * On more complex mappings (dma_map_sg), a pseudo routine fills | |
932 | * in the scatter list, setting all dma addresses to 0. | |
933 | */ | |
934 | ||
935 | static inline dma_addr_t | |
936 | fc_dma_map_single(struct device *dev, void *ptr, size_t size, | |
937 | enum dma_data_direction dir) | |
938 | { | |
939 | return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; | |
940 | } | |
941 | ||
942 | static inline int | |
943 | fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
944 | { | |
945 | return dev ? dma_mapping_error(dev, dma_addr) : 0; | |
946 | } | |
947 | ||
948 | static inline void | |
949 | fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
950 | enum dma_data_direction dir) | |
951 | { | |
952 | if (dev) | |
953 | dma_unmap_single(dev, addr, size, dir); | |
954 | } | |
955 | ||
956 | static inline void | |
957 | fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, | |
958 | enum dma_data_direction dir) | |
959 | { | |
960 | if (dev) | |
961 | dma_sync_single_for_cpu(dev, addr, size, dir); | |
962 | } | |
963 | ||
964 | static inline void | |
965 | fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, | |
966 | enum dma_data_direction dir) | |
967 | { | |
968 | if (dev) | |
969 | dma_sync_single_for_device(dev, addr, size, dir); | |
970 | } | |
971 | ||
972 | /* pseudo dma_map_sg call */ | |
973 | static int | |
974 | fc_map_sg(struct scatterlist *sg, int nents) | |
975 | { | |
976 | struct scatterlist *s; | |
977 | int i; | |
978 | ||
979 | WARN_ON(nents == 0 || sg[0].length == 0); | |
980 | ||
981 | for_each_sg(sg, s, nents, i) { | |
982 | s->dma_address = 0L; | |
983 | #ifdef CONFIG_NEED_SG_DMA_LENGTH | |
984 | s->dma_length = s->length; | |
985 | #endif | |
986 | } | |
987 | return nents; | |
988 | } | |
989 | ||
990 | static inline int | |
991 | fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
992 | enum dma_data_direction dir) | |
993 | { | |
994 | return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); | |
995 | } | |
996 | ||
997 | static inline void | |
998 | fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, | |
999 | enum dma_data_direction dir) | |
1000 | { | |
1001 | if (dev) | |
1002 | dma_unmap_sg(dev, sg, nents, dir); | |
1003 | } | |
1004 | ||
e399441d JS |
1005 | /* *********************** FC-NVME LS Handling **************************** */ |
1006 | ||
1007 | static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); | |
1008 | static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); | |
1009 | ||
1010 | ||
1011 | static void | |
c913a8b0 | 1012 | __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) |
e399441d | 1013 | { |
c913a8b0 | 1014 | struct nvme_fc_rport *rport = lsop->rport; |
e399441d JS |
1015 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; |
1016 | unsigned long flags; | |
1017 | ||
c913a8b0 | 1018 | spin_lock_irqsave(&rport->lock, flags); |
e399441d JS |
1019 | |
1020 | if (!lsop->req_queued) { | |
c913a8b0 | 1021 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d JS |
1022 | return; |
1023 | } | |
1024 | ||
1025 | list_del(&lsop->lsreq_list); | |
1026 | ||
1027 | lsop->req_queued = false; | |
1028 | ||
c913a8b0 | 1029 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 1030 | |
c913a8b0 | 1031 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, |
e399441d JS |
1032 | (lsreq->rqstlen + lsreq->rsplen), |
1033 | DMA_BIDIRECTIONAL); | |
1034 | ||
c913a8b0 | 1035 | nvme_fc_rport_put(rport); |
e399441d JS |
1036 | } |
1037 | ||
1038 | static int | |
c913a8b0 | 1039 | __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, |
e399441d JS |
1040 | struct nvmefc_ls_req_op *lsop, |
1041 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
1042 | { | |
1043 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
1044 | unsigned long flags; | |
c913a8b0 | 1045 | int ret = 0; |
e399441d | 1046 | |
c913a8b0 JS |
1047 | if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
1048 | return -ECONNREFUSED; | |
1049 | ||
1050 | if (!nvme_fc_rport_get(rport)) | |
e399441d JS |
1051 | return -ESHUTDOWN; |
1052 | ||
1053 | lsreq->done = done; | |
c913a8b0 | 1054 | lsop->rport = rport; |
e399441d JS |
1055 | lsop->req_queued = false; |
1056 | INIT_LIST_HEAD(&lsop->lsreq_list); | |
1057 | init_completion(&lsop->ls_done); | |
1058 | ||
c913a8b0 | 1059 | lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, |
e399441d JS |
1060 | lsreq->rqstlen + lsreq->rsplen, |
1061 | DMA_BIDIRECTIONAL); | |
c913a8b0 JS |
1062 | if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { |
1063 | ret = -EFAULT; | |
1064 | goto out_putrport; | |
e399441d JS |
1065 | } |
1066 | lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; | |
1067 | ||
c913a8b0 | 1068 | spin_lock_irqsave(&rport->lock, flags); |
e399441d | 1069 | |
c913a8b0 | 1070 | list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); |
e399441d JS |
1071 | |
1072 | lsop->req_queued = true; | |
1073 | ||
c913a8b0 | 1074 | spin_unlock_irqrestore(&rport->lock, flags); |
e399441d | 1075 | |
c913a8b0 JS |
1076 | ret = rport->lport->ops->ls_req(&rport->lport->localport, |
1077 | &rport->remoteport, lsreq); | |
e399441d | 1078 | if (ret) |
c913a8b0 JS |
1079 | goto out_unlink; |
1080 | ||
1081 | return 0; | |
1082 | ||
1083 | out_unlink: | |
1084 | lsop->ls_error = ret; | |
1085 | spin_lock_irqsave(&rport->lock, flags); | |
1086 | lsop->req_queued = false; | |
1087 | list_del(&lsop->lsreq_list); | |
1088 | spin_unlock_irqrestore(&rport->lock, flags); | |
1089 | fc_dma_unmap_single(rport->dev, lsreq->rqstdma, | |
1090 | (lsreq->rqstlen + lsreq->rsplen), | |
1091 | DMA_BIDIRECTIONAL); | |
1092 | out_putrport: | |
1093 | nvme_fc_rport_put(rport); | |
e399441d JS |
1094 | |
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | static void | |
1099 | nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) | |
1100 | { | |
1101 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
1102 | ||
1103 | lsop->ls_error = status; | |
1104 | complete(&lsop->ls_done); | |
1105 | } | |
1106 | ||
1107 | static int | |
c913a8b0 | 1108 | nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) |
e399441d JS |
1109 | { |
1110 | struct nvmefc_ls_req *lsreq = &lsop->ls_req; | |
1111 | struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; | |
1112 | int ret; | |
1113 | ||
c913a8b0 | 1114 | ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); |
e399441d | 1115 | |
c913a8b0 | 1116 | if (!ret) { |
e399441d JS |
1117 | /* |
1118 | * No timeout/not interruptible as we need the struct | |
1119 | * to exist until the lldd calls us back. Thus mandate | |
1120 | * wait until driver calls back. lldd responsible for | |
1121 | * the timeout action | |
1122 | */ | |
1123 | wait_for_completion(&lsop->ls_done); | |
1124 | ||
c913a8b0 | 1125 | __nvme_fc_finish_ls_req(lsop); |
e399441d | 1126 | |
c913a8b0 | 1127 | ret = lsop->ls_error; |
e399441d JS |
1128 | } |
1129 | ||
c913a8b0 JS |
1130 | if (ret) |
1131 | return ret; | |
1132 | ||
e399441d JS |
1133 | /* ACC or RJT payload ? */ |
1134 | if (rjt->w0.ls_cmd == FCNVME_LS_RJT) | |
1135 | return -ENXIO; | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
c913a8b0 JS |
1140 | static int |
1141 | nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, | |
e399441d JS |
1142 | struct nvmefc_ls_req_op *lsop, |
1143 | void (*done)(struct nvmefc_ls_req *req, int status)) | |
1144 | { | |
e399441d JS |
1145 | /* don't wait for completion */ |
1146 | ||
c913a8b0 | 1147 | return __nvme_fc_send_ls_req(rport, lsop, done); |
e399441d JS |
1148 | } |
1149 | ||
1150 | /* Validation Error indexes into the string table below */ | |
1151 | enum { | |
1152 | VERR_NO_ERROR = 0, | |
1153 | VERR_LSACC = 1, | |
1154 | VERR_LSDESC_RQST = 2, | |
1155 | VERR_LSDESC_RQST_LEN = 3, | |
1156 | VERR_ASSOC_ID = 4, | |
1157 | VERR_ASSOC_ID_LEN = 5, | |
1158 | VERR_CONN_ID = 6, | |
1159 | VERR_CONN_ID_LEN = 7, | |
1160 | VERR_CR_ASSOC = 8, | |
1161 | VERR_CR_ASSOC_ACC_LEN = 9, | |
1162 | VERR_CR_CONN = 10, | |
1163 | VERR_CR_CONN_ACC_LEN = 11, | |
1164 | VERR_DISCONN = 12, | |
1165 | VERR_DISCONN_ACC_LEN = 13, | |
1166 | }; | |
1167 | ||
1168 | static char *validation_errors[] = { | |
1169 | "OK", | |
1170 | "Not LS_ACC", | |
1171 | "Not LSDESC_RQST", | |
1172 | "Bad LSDESC_RQST Length", | |
1173 | "Not Association ID", | |
1174 | "Bad Association ID Length", | |
1175 | "Not Connection ID", | |
1176 | "Bad Connection ID Length", | |
1177 | "Not CR_ASSOC Rqst", | |
1178 | "Bad CR_ASSOC ACC Length", | |
1179 | "Not CR_CONN Rqst", | |
1180 | "Bad CR_CONN ACC Length", | |
1181 | "Not Disconnect Rqst", | |
1182 | "Bad Disconnect ACC Length", | |
1183 | }; | |
1184 | ||
1185 | static int | |
1186 | nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, | |
1187 | struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) | |
1188 | { | |
1189 | struct nvmefc_ls_req_op *lsop; | |
1190 | struct nvmefc_ls_req *lsreq; | |
1191 | struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; | |
1192 | struct fcnvme_ls_cr_assoc_acc *assoc_acc; | |
1193 | int ret, fcret = 0; | |
1194 | ||
1195 | lsop = kzalloc((sizeof(*lsop) + | |
1196 | ctrl->lport->ops->lsrqst_priv_sz + | |
1197 | sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); | |
1198 | if (!lsop) { | |
1199 | ret = -ENOMEM; | |
1200 | goto out_no_memory; | |
1201 | } | |
1202 | lsreq = &lsop->ls_req; | |
1203 | ||
1204 | lsreq->private = (void *)&lsop[1]; | |
1205 | assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) | |
1206 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1207 | assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; | |
1208 | ||
1209 | assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; | |
1210 | assoc_rqst->desc_list_len = | |
1211 | cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
1212 | ||
1213 | assoc_rqst->assoc_cmd.desc_tag = | |
1214 | cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); | |
1215 | assoc_rqst->assoc_cmd.desc_len = | |
1216 | fcnvme_lsdesc_len( | |
1217 | sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); | |
1218 | ||
1219 | assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
d157e534 | 1220 | assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize - 1); |
e399441d JS |
1221 | /* Linux supports only Dynamic controllers */ |
1222 | assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); | |
8e412263 | 1223 | uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); |
e399441d JS |
1224 | strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, |
1225 | min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); | |
1226 | strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, | |
1227 | min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); | |
1228 | ||
1229 | lsop->queue = queue; | |
1230 | lsreq->rqstaddr = assoc_rqst; | |
1231 | lsreq->rqstlen = sizeof(*assoc_rqst); | |
1232 | lsreq->rspaddr = assoc_acc; | |
1233 | lsreq->rsplen = sizeof(*assoc_acc); | |
1234 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1235 | ||
c913a8b0 | 1236 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1237 | if (ret) |
1238 | goto out_free_buffer; | |
1239 | ||
1240 | /* process connect LS completion */ | |
1241 | ||
1242 | /* validate the ACC response */ | |
1243 | if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1244 | fcret = VERR_LSACC; | |
f77fc87c | 1245 | else if (assoc_acc->hdr.desc_list_len != |
e399441d JS |
1246 | fcnvme_lsdesc_len( |
1247 | sizeof(struct fcnvme_ls_cr_assoc_acc))) | |
1248 | fcret = VERR_CR_ASSOC_ACC_LEN; | |
f77fc87c JS |
1249 | else if (assoc_acc->hdr.rqst.desc_tag != |
1250 | cpu_to_be32(FCNVME_LSDESC_RQST)) | |
e399441d JS |
1251 | fcret = VERR_LSDESC_RQST; |
1252 | else if (assoc_acc->hdr.rqst.desc_len != | |
1253 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1254 | fcret = VERR_LSDESC_RQST_LEN; | |
1255 | else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) | |
1256 | fcret = VERR_CR_ASSOC; | |
1257 | else if (assoc_acc->associd.desc_tag != | |
1258 | cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) | |
1259 | fcret = VERR_ASSOC_ID; | |
1260 | else if (assoc_acc->associd.desc_len != | |
1261 | fcnvme_lsdesc_len( | |
1262 | sizeof(struct fcnvme_lsdesc_assoc_id))) | |
1263 | fcret = VERR_ASSOC_ID_LEN; | |
1264 | else if (assoc_acc->connectid.desc_tag != | |
1265 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1266 | fcret = VERR_CONN_ID; | |
1267 | else if (assoc_acc->connectid.desc_len != | |
1268 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1269 | fcret = VERR_CONN_ID_LEN; | |
1270 | ||
1271 | if (fcret) { | |
1272 | ret = -EBADF; | |
1273 | dev_err(ctrl->dev, | |
1274 | "q %d connect failed: %s\n", | |
1275 | queue->qnum, validation_errors[fcret]); | |
1276 | } else { | |
1277 | ctrl->association_id = | |
1278 | be64_to_cpu(assoc_acc->associd.association_id); | |
1279 | queue->connection_id = | |
1280 | be64_to_cpu(assoc_acc->connectid.connection_id); | |
1281 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1282 | } | |
1283 | ||
1284 | out_free_buffer: | |
1285 | kfree(lsop); | |
1286 | out_no_memory: | |
1287 | if (ret) | |
1288 | dev_err(ctrl->dev, | |
1289 | "queue %d connect admin queue failed (%d).\n", | |
1290 | queue->qnum, ret); | |
1291 | return ret; | |
1292 | } | |
1293 | ||
1294 | static int | |
1295 | nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, | |
1296 | u16 qsize, u16 ersp_ratio) | |
1297 | { | |
1298 | struct nvmefc_ls_req_op *lsop; | |
1299 | struct nvmefc_ls_req *lsreq; | |
1300 | struct fcnvme_ls_cr_conn_rqst *conn_rqst; | |
1301 | struct fcnvme_ls_cr_conn_acc *conn_acc; | |
1302 | int ret, fcret = 0; | |
1303 | ||
1304 | lsop = kzalloc((sizeof(*lsop) + | |
1305 | ctrl->lport->ops->lsrqst_priv_sz + | |
1306 | sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); | |
1307 | if (!lsop) { | |
1308 | ret = -ENOMEM; | |
1309 | goto out_no_memory; | |
1310 | } | |
1311 | lsreq = &lsop->ls_req; | |
1312 | ||
1313 | lsreq->private = (void *)&lsop[1]; | |
1314 | conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) | |
1315 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1316 | conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; | |
1317 | ||
1318 | conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; | |
1319 | conn_rqst->desc_list_len = cpu_to_be32( | |
1320 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1321 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1322 | ||
1323 | conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1324 | conn_rqst->associd.desc_len = | |
1325 | fcnvme_lsdesc_len( | |
1326 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1327 | conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1328 | conn_rqst->connect_cmd.desc_tag = | |
1329 | cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); | |
1330 | conn_rqst->connect_cmd.desc_len = | |
1331 | fcnvme_lsdesc_len( | |
1332 | sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); | |
1333 | conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); | |
1334 | conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); | |
d157e534 | 1335 | conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize - 1); |
e399441d JS |
1336 | |
1337 | lsop->queue = queue; | |
1338 | lsreq->rqstaddr = conn_rqst; | |
1339 | lsreq->rqstlen = sizeof(*conn_rqst); | |
1340 | lsreq->rspaddr = conn_acc; | |
1341 | lsreq->rsplen = sizeof(*conn_acc); | |
1342 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1343 | ||
c913a8b0 | 1344 | ret = nvme_fc_send_ls_req(ctrl->rport, lsop); |
e399441d JS |
1345 | if (ret) |
1346 | goto out_free_buffer; | |
1347 | ||
1348 | /* process connect LS completion */ | |
1349 | ||
1350 | /* validate the ACC response */ | |
1351 | if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) | |
1352 | fcret = VERR_LSACC; | |
f77fc87c | 1353 | else if (conn_acc->hdr.desc_list_len != |
e399441d JS |
1354 | fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) |
1355 | fcret = VERR_CR_CONN_ACC_LEN; | |
f77fc87c | 1356 | else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) |
e399441d JS |
1357 | fcret = VERR_LSDESC_RQST; |
1358 | else if (conn_acc->hdr.rqst.desc_len != | |
1359 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) | |
1360 | fcret = VERR_LSDESC_RQST_LEN; | |
1361 | else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) | |
1362 | fcret = VERR_CR_CONN; | |
1363 | else if (conn_acc->connectid.desc_tag != | |
1364 | cpu_to_be32(FCNVME_LSDESC_CONN_ID)) | |
1365 | fcret = VERR_CONN_ID; | |
1366 | else if (conn_acc->connectid.desc_len != | |
1367 | fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) | |
1368 | fcret = VERR_CONN_ID_LEN; | |
1369 | ||
1370 | if (fcret) { | |
1371 | ret = -EBADF; | |
1372 | dev_err(ctrl->dev, | |
1373 | "q %d connect failed: %s\n", | |
1374 | queue->qnum, validation_errors[fcret]); | |
1375 | } else { | |
1376 | queue->connection_id = | |
1377 | be64_to_cpu(conn_acc->connectid.connection_id); | |
1378 | set_bit(NVME_FC_Q_CONNECTED, &queue->flags); | |
1379 | } | |
1380 | ||
1381 | out_free_buffer: | |
1382 | kfree(lsop); | |
1383 | out_no_memory: | |
1384 | if (ret) | |
1385 | dev_err(ctrl->dev, | |
1386 | "queue %d connect command failed (%d).\n", | |
1387 | queue->qnum, ret); | |
1388 | return ret; | |
1389 | } | |
1390 | ||
1391 | static void | |
1392 | nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) | |
1393 | { | |
1394 | struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); | |
e399441d | 1395 | |
c913a8b0 | 1396 | __nvme_fc_finish_ls_req(lsop); |
e399441d | 1397 | |
d4e4230c | 1398 | /* fc-nvme initiator doesn't care about success or failure of cmd */ |
e399441d JS |
1399 | |
1400 | kfree(lsop); | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * This routine sends a FC-NVME LS to disconnect (aka terminate) | |
1405 | * the FC-NVME Association. Terminating the association also | |
1406 | * terminates the FC-NVME connections (per queue, both admin and io | |
1407 | * queues) that are part of the association. E.g. things are torn | |
1408 | * down, and the related FC-NVME Association ID and Connection IDs | |
1409 | * become invalid. | |
1410 | * | |
1411 | * The behavior of the fc-nvme initiator is such that it's | |
1412 | * understanding of the association and connections will implicitly | |
1413 | * be torn down. The action is implicit as it may be due to a loss of | |
1414 | * connectivity with the fc-nvme target, so you may never get a | |
1415 | * response even if you tried. As such, the action of this routine | |
1416 | * is to asynchronously send the LS, ignore any results of the LS, and | |
1417 | * continue on with terminating the association. If the fc-nvme target | |
1418 | * is present and receives the LS, it too can tear down. | |
1419 | */ | |
1420 | static void | |
1421 | nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) | |
1422 | { | |
1423 | struct fcnvme_ls_disconnect_rqst *discon_rqst; | |
1424 | struct fcnvme_ls_disconnect_acc *discon_acc; | |
1425 | struct nvmefc_ls_req_op *lsop; | |
1426 | struct nvmefc_ls_req *lsreq; | |
c913a8b0 | 1427 | int ret; |
e399441d JS |
1428 | |
1429 | lsop = kzalloc((sizeof(*lsop) + | |
1430 | ctrl->lport->ops->lsrqst_priv_sz + | |
1431 | sizeof(*discon_rqst) + sizeof(*discon_acc)), | |
1432 | GFP_KERNEL); | |
1433 | if (!lsop) | |
1434 | /* couldn't sent it... too bad */ | |
1435 | return; | |
1436 | ||
1437 | lsreq = &lsop->ls_req; | |
1438 | ||
1439 | lsreq->private = (void *)&lsop[1]; | |
1440 | discon_rqst = (struct fcnvme_ls_disconnect_rqst *) | |
1441 | (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); | |
1442 | discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; | |
1443 | ||
1444 | discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; | |
1445 | discon_rqst->desc_list_len = cpu_to_be32( | |
1446 | sizeof(struct fcnvme_lsdesc_assoc_id) + | |
1447 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1448 | ||
1449 | discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); | |
1450 | discon_rqst->associd.desc_len = | |
1451 | fcnvme_lsdesc_len( | |
1452 | sizeof(struct fcnvme_lsdesc_assoc_id)); | |
1453 | ||
1454 | discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); | |
1455 | ||
1456 | discon_rqst->discon_cmd.desc_tag = cpu_to_be32( | |
1457 | FCNVME_LSDESC_DISCONN_CMD); | |
1458 | discon_rqst->discon_cmd.desc_len = | |
1459 | fcnvme_lsdesc_len( | |
1460 | sizeof(struct fcnvme_lsdesc_disconn_cmd)); | |
1461 | discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; | |
1462 | discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); | |
1463 | ||
1464 | lsreq->rqstaddr = discon_rqst; | |
1465 | lsreq->rqstlen = sizeof(*discon_rqst); | |
1466 | lsreq->rspaddr = discon_acc; | |
1467 | lsreq->rsplen = sizeof(*discon_acc); | |
1468 | lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; | |
1469 | ||
c913a8b0 JS |
1470 | ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, |
1471 | nvme_fc_disconnect_assoc_done); | |
1472 | if (ret) | |
1473 | kfree(lsop); | |
e399441d JS |
1474 | |
1475 | /* only meaningful part to terminating the association */ | |
1476 | ctrl->association_id = 0; | |
1477 | } | |
1478 | ||
1479 | ||
1480 | /* *********************** NVME Ctrl Routines **************************** */ | |
1481 | ||
f874d5d0 | 1482 | static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); |
e399441d | 1483 | |
e399441d JS |
1484 | static void |
1485 | __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, | |
1486 | struct nvme_fc_fcp_op *op) | |
1487 | { | |
1488 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, | |
1489 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1490 | fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, | |
1491 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1492 | ||
1493 | atomic_set(&op->state, FCPOP_STATE_UNINIT); | |
1494 | } | |
1495 | ||
1496 | static void | |
d6296d39 CH |
1497 | nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
1498 | unsigned int hctx_idx) | |
e399441d JS |
1499 | { |
1500 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
1501 | ||
d6296d39 | 1502 | return __nvme_fc_exit_request(set->driver_data, op); |
e399441d JS |
1503 | } |
1504 | ||
78a7ac26 JS |
1505 | static int |
1506 | __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) | |
1507 | { | |
3efd6e8e JS |
1508 | unsigned long flags; |
1509 | int opstate; | |
1510 | ||
1511 | spin_lock_irqsave(&ctrl->lock, flags); | |
1512 | opstate = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); | |
1513 | if (opstate != FCPOP_STATE_ACTIVE) | |
1514 | atomic_set(&op->state, opstate); | |
1515 | else if (ctrl->flags & FCCTRL_TERMIO) | |
1516 | ctrl->iocnt++; | |
1517 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
78a7ac26 | 1518 | |
3efd6e8e | 1519 | if (opstate != FCPOP_STATE_ACTIVE) |
78a7ac26 | 1520 | return -ECANCELED; |
78a7ac26 JS |
1521 | |
1522 | ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, | |
1523 | &ctrl->rport->remoteport, | |
1524 | op->queue->lldd_handle, | |
1525 | &op->fcp_req); | |
1526 | ||
1527 | return 0; | |
1528 | } | |
1529 | ||
e399441d | 1530 | static void |
78a7ac26 | 1531 | nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
1532 | { |
1533 | struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; | |
3efd6e8e | 1534 | int i; |
78a7ac26 | 1535 | |
4cff280a JS |
1536 | /* ensure we've initialized the ops once */ |
1537 | if (!(aen_op->flags & FCOP_FLAGS_AEN)) | |
1538 | return; | |
1539 | ||
3efd6e8e JS |
1540 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) |
1541 | __nvme_fc_abort_op(ctrl, aen_op); | |
e399441d JS |
1542 | } |
1543 | ||
c3aedd22 | 1544 | static inline void |
78a7ac26 | 1545 | __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, |
3efd6e8e | 1546 | struct nvme_fc_fcp_op *op, int opstate) |
78a7ac26 JS |
1547 | { |
1548 | unsigned long flags; | |
78a7ac26 | 1549 | |
c3aedd22 JS |
1550 | if (opstate == FCPOP_STATE_ABORTED) { |
1551 | spin_lock_irqsave(&ctrl->lock, flags); | |
1552 | if (ctrl->flags & FCCTRL_TERMIO) { | |
1553 | if (!--ctrl->iocnt) | |
1554 | wake_up(&ctrl->ioabort_wait); | |
1555 | } | |
1556 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
61bff8ef | 1557 | } |
78a7ac26 JS |
1558 | } |
1559 | ||
baee29ac | 1560 | static void |
e399441d JS |
1561 | nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) |
1562 | { | |
1563 | struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); | |
1564 | struct request *rq = op->rq; | |
1565 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
1566 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
1567 | struct nvme_fc_queue *queue = op->queue; | |
1568 | struct nvme_completion *cqe = &op->rsp_iu.cqe; | |
458f280d | 1569 | struct nvme_command *sqe = &op->cmd_iu.sqe; |
d663b69f | 1570 | __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); |
27fa9bc5 | 1571 | union nvme_result result; |
0a02e39f | 1572 | bool terminate_assoc = true; |
3efd6e8e | 1573 | int opstate; |
e399441d JS |
1574 | |
1575 | /* | |
1576 | * WARNING: | |
1577 | * The current linux implementation of a nvme controller | |
1578 | * allocates a single tag set for all io queues and sizes | |
1579 | * the io queues to fully hold all possible tags. Thus, the | |
1580 | * implementation does not reference or care about the sqhd | |
1581 | * value as it never needs to use the sqhd/sqtail pointers | |
1582 | * for submission pacing. | |
1583 | * | |
1584 | * This affects the FC-NVME implementation in two ways: | |
1585 | * 1) As the value doesn't matter, we don't need to waste | |
1586 | * cycles extracting it from ERSPs and stamping it in the | |
1587 | * cases where the transport fabricates CQEs on successful | |
1588 | * completions. | |
1589 | * 2) The FC-NVME implementation requires that delivery of | |
1590 | * ERSP completions are to go back to the nvme layer in order | |
1591 | * relative to the rsn, such that the sqhd value will always | |
1592 | * be "in order" for the nvme layer. As the nvme layer in | |
1593 | * linux doesn't care about sqhd, there's no need to return | |
1594 | * them in order. | |
1595 | * | |
1596 | * Additionally: | |
1597 | * As the core nvme layer in linux currently does not look at | |
1598 | * every field in the cqe - in cases where the FC transport must | |
1599 | * fabricate a CQE, the following fields will not be set as they | |
1600 | * are not referenced: | |
1601 | * cqe.sqid, cqe.sqhd, cqe.command_id | |
f874d5d0 JS |
1602 | * |
1603 | * Failure or error of an individual i/o, in a transport | |
1604 | * detected fashion unrelated to the nvme completion status, | |
1605 | * potentially cause the initiator and target sides to get out | |
1606 | * of sync on SQ head/tail (aka outstanding io count allowed). | |
1607 | * Per FC-NVME spec, failure of an individual command requires | |
1608 | * the connection to be terminated, which in turn requires the | |
1609 | * association to be terminated. | |
e399441d JS |
1610 | */ |
1611 | ||
3efd6e8e JS |
1612 | opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE); |
1613 | ||
e399441d JS |
1614 | fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, |
1615 | sizeof(op->rsp_iu), DMA_FROM_DEVICE); | |
1616 | ||
3efd6e8e | 1617 | if (opstate == FCPOP_STATE_ABORTED) |
0a02e39f | 1618 | status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); |
62eeacb0 | 1619 | else if (freq->status) |
56b7103a | 1620 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1621 | |
1622 | /* | |
1623 | * For the linux implementation, if we have an unsuccesful | |
1624 | * status, they blk-mq layer can typically be called with the | |
1625 | * non-zero status and the content of the cqe isn't important. | |
1626 | */ | |
1627 | if (status) | |
1628 | goto done; | |
1629 | ||
1630 | /* | |
1631 | * command completed successfully relative to the wire | |
1632 | * protocol. However, validate anything received and | |
1633 | * extract the status and result from the cqe (create it | |
1634 | * where necessary). | |
1635 | */ | |
1636 | ||
1637 | switch (freq->rcv_rsplen) { | |
1638 | ||
1639 | case 0: | |
1640 | case NVME_FC_SIZEOF_ZEROS_RSP: | |
1641 | /* | |
1642 | * No response payload or 12 bytes of payload (which | |
1643 | * should all be zeros) are considered successful and | |
1644 | * no payload in the CQE by the transport. | |
1645 | */ | |
1646 | if (freq->transferred_length != | |
1647 | be32_to_cpu(op->cmd_iu.data_len)) { | |
56b7103a | 1648 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1649 | goto done; |
1650 | } | |
27fa9bc5 | 1651 | result.u64 = 0; |
e399441d JS |
1652 | break; |
1653 | ||
1654 | case sizeof(struct nvme_fc_ersp_iu): | |
1655 | /* | |
1656 | * The ERSP IU contains a full completion with CQE. | |
1657 | * Validate ERSP IU and look at cqe. | |
1658 | */ | |
1659 | if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != | |
1660 | (freq->rcv_rsplen / 4) || | |
1661 | be32_to_cpu(op->rsp_iu.xfrd_len) != | |
1662 | freq->transferred_length || | |
726a1080 | 1663 | op->rsp_iu.status_code || |
458f280d | 1664 | sqe->common.command_id != cqe->command_id)) { |
56b7103a | 1665 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1666 | goto done; |
1667 | } | |
27fa9bc5 | 1668 | result = cqe->result; |
d663b69f | 1669 | status = cqe->status; |
e399441d JS |
1670 | break; |
1671 | ||
1672 | default: | |
56b7103a | 1673 | status = cpu_to_le16(NVME_SC_INTERNAL << 1); |
e399441d JS |
1674 | goto done; |
1675 | } | |
1676 | ||
f874d5d0 JS |
1677 | terminate_assoc = false; |
1678 | ||
e399441d | 1679 | done: |
78a7ac26 | 1680 | if (op->flags & FCOP_FLAGS_AEN) { |
27fa9bc5 | 1681 | nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); |
3efd6e8e | 1682 | __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); |
78a7ac26 JS |
1683 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
1684 | op->flags = FCOP_FLAGS_AEN; /* clear other flags */ | |
e399441d | 1685 | nvme_fc_ctrl_put(ctrl); |
f874d5d0 | 1686 | goto check_error; |
e399441d JS |
1687 | } |
1688 | ||
c3aedd22 JS |
1689 | __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); |
1690 | nvme_end_request(rq, status, result); | |
f874d5d0 JS |
1691 | |
1692 | check_error: | |
1693 | if (terminate_assoc) | |
1694 | nvme_fc_error_recovery(ctrl, "transport detected io error"); | |
e399441d JS |
1695 | } |
1696 | ||
1697 | static int | |
1698 | __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, | |
1699 | struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, | |
1700 | struct request *rq, u32 rqno) | |
1701 | { | |
d3d0bc78 BVA |
1702 | struct nvme_fcp_op_w_sgl *op_w_sgl = |
1703 | container_of(op, typeof(*op_w_sgl), op); | |
e399441d JS |
1704 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; |
1705 | int ret = 0; | |
1706 | ||
1707 | memset(op, 0, sizeof(*op)); | |
1708 | op->fcp_req.cmdaddr = &op->cmd_iu; | |
1709 | op->fcp_req.cmdlen = sizeof(op->cmd_iu); | |
1710 | op->fcp_req.rspaddr = &op->rsp_iu; | |
1711 | op->fcp_req.rsplen = sizeof(op->rsp_iu); | |
1712 | op->fcp_req.done = nvme_fc_fcpio_done; | |
e399441d JS |
1713 | op->ctrl = ctrl; |
1714 | op->queue = queue; | |
1715 | op->rq = rq; | |
1716 | op->rqno = rqno; | |
1717 | ||
1718 | cmdiu->scsi_id = NVME_CMD_SCSI_ID; | |
1719 | cmdiu->fc_id = NVME_CMD_FC_ID; | |
1720 | cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); | |
1721 | ||
1722 | op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, | |
1723 | &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
1724 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { | |
1725 | dev_err(ctrl->dev, | |
1726 | "FCP Op failed - cmdiu dma mapping failed.\n"); | |
1727 | ret = EFAULT; | |
1728 | goto out_on_error; | |
1729 | } | |
1730 | ||
1731 | op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, | |
1732 | &op->rsp_iu, sizeof(op->rsp_iu), | |
1733 | DMA_FROM_DEVICE); | |
1734 | if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { | |
1735 | dev_err(ctrl->dev, | |
1736 | "FCP Op failed - rspiu dma mapping failed.\n"); | |
1737 | ret = EFAULT; | |
1738 | } | |
1739 | ||
1740 | atomic_set(&op->state, FCPOP_STATE_IDLE); | |
1741 | out_on_error: | |
1742 | return ret; | |
1743 | } | |
1744 | ||
1745 | static int | |
d6296d39 CH |
1746 | nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, |
1747 | unsigned int hctx_idx, unsigned int numa_node) | |
e399441d | 1748 | { |
d6296d39 | 1749 | struct nvme_fc_ctrl *ctrl = set->driver_data; |
d3d0bc78 | 1750 | struct nvme_fcp_op_w_sgl *op = blk_mq_rq_to_pdu(rq); |
76f983cb CH |
1751 | int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; |
1752 | struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; | |
0d2bdf9f | 1753 | int res; |
e399441d | 1754 | |
59e29ce6 | 1755 | nvme_req(rq)->ctrl = &ctrl->ctrl; |
0d2bdf9f BVA |
1756 | res = __nvme_fc_init_request(ctrl, queue, &op->op, rq, queue->rqcnt++); |
1757 | if (res) | |
1758 | return res; | |
1759 | op->op.fcp_req.first_sgl = &op->sgl[0]; | |
d19b8bc8 | 1760 | op->op.fcp_req.private = &op->priv[0]; |
0d2bdf9f | 1761 | return res; |
e399441d JS |
1762 | } |
1763 | ||
1764 | static int | |
1765 | nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1766 | { | |
1767 | struct nvme_fc_fcp_op *aen_op; | |
1768 | struct nvme_fc_cmd_iu *cmdiu; | |
1769 | struct nvme_command *sqe; | |
61bff8ef | 1770 | void *private; |
e399441d JS |
1771 | int i, ret; |
1772 | ||
1773 | aen_op = ctrl->aen_ops; | |
38dabe21 | 1774 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { |
61bff8ef JS |
1775 | private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, |
1776 | GFP_KERNEL); | |
1777 | if (!private) | |
1778 | return -ENOMEM; | |
1779 | ||
e399441d JS |
1780 | cmdiu = &aen_op->cmd_iu; |
1781 | sqe = &cmdiu->sqe; | |
1782 | ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], | |
1783 | aen_op, (struct request *)NULL, | |
38dabe21 | 1784 | (NVME_AQ_BLK_MQ_DEPTH + i)); |
61bff8ef JS |
1785 | if (ret) { |
1786 | kfree(private); | |
e399441d | 1787 | return ret; |
61bff8ef | 1788 | } |
e399441d | 1789 | |
78a7ac26 | 1790 | aen_op->flags = FCOP_FLAGS_AEN; |
61bff8ef | 1791 | aen_op->fcp_req.private = private; |
78a7ac26 | 1792 | |
e399441d JS |
1793 | memset(sqe, 0, sizeof(*sqe)); |
1794 | sqe->common.opcode = nvme_admin_async_event; | |
78a7ac26 | 1795 | /* Note: core layer may overwrite the sqe.command_id value */ |
38dabe21 | 1796 | sqe->common.command_id = NVME_AQ_BLK_MQ_DEPTH + i; |
e399441d JS |
1797 | } |
1798 | return 0; | |
1799 | } | |
1800 | ||
61bff8ef JS |
1801 | static void |
1802 | nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) | |
1803 | { | |
1804 | struct nvme_fc_fcp_op *aen_op; | |
1805 | int i; | |
1806 | ||
1807 | aen_op = ctrl->aen_ops; | |
38dabe21 | 1808 | for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { |
61bff8ef JS |
1809 | if (!aen_op->fcp_req.private) |
1810 | continue; | |
1811 | ||
1812 | __nvme_fc_exit_request(ctrl, aen_op); | |
1813 | ||
1814 | kfree(aen_op->fcp_req.private); | |
1815 | aen_op->fcp_req.private = NULL; | |
1816 | } | |
1817 | } | |
e399441d JS |
1818 | |
1819 | static inline void | |
1820 | __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, | |
1821 | unsigned int qidx) | |
1822 | { | |
1823 | struct nvme_fc_queue *queue = &ctrl->queues[qidx]; | |
1824 | ||
1825 | hctx->driver_data = queue; | |
1826 | queue->hctx = hctx; | |
1827 | } | |
1828 | ||
1829 | static int | |
1830 | nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1831 | unsigned int hctx_idx) | |
1832 | { | |
1833 | struct nvme_fc_ctrl *ctrl = data; | |
1834 | ||
1835 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); | |
1836 | ||
1837 | return 0; | |
1838 | } | |
1839 | ||
1840 | static int | |
1841 | nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
1842 | unsigned int hctx_idx) | |
1843 | { | |
1844 | struct nvme_fc_ctrl *ctrl = data; | |
1845 | ||
1846 | __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); | |
1847 | ||
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | static void | |
08e15075 | 1852 | nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx) |
e399441d JS |
1853 | { |
1854 | struct nvme_fc_queue *queue; | |
1855 | ||
1856 | queue = &ctrl->queues[idx]; | |
1857 | memset(queue, 0, sizeof(*queue)); | |
1858 | queue->ctrl = ctrl; | |
1859 | queue->qnum = idx; | |
1860 | atomic_set(&queue->csn, 1); | |
1861 | queue->dev = ctrl->dev; | |
1862 | ||
1863 | if (idx > 0) | |
1864 | queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; | |
1865 | else | |
1866 | queue->cmnd_capsule_len = sizeof(struct nvme_command); | |
1867 | ||
e399441d JS |
1868 | /* |
1869 | * Considered whether we should allocate buffers for all SQEs | |
1870 | * and CQEs and dma map them - mapping their respective entries | |
1871 | * into the request structures (kernel vm addr and dma address) | |
1872 | * thus the driver could use the buffers/mappings directly. | |
1873 | * It only makes sense if the LLDD would use them for its | |
1874 | * messaging api. It's very unlikely most adapter api's would use | |
1875 | * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload | |
1876 | * structures were used instead. | |
1877 | */ | |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * This routine terminates a queue at the transport level. | |
1882 | * The transport has already ensured that all outstanding ios on | |
1883 | * the queue have been terminated. | |
1884 | * The transport will send a Disconnect LS request to terminate | |
1885 | * the queue's connection. Termination of the admin queue will also | |
1886 | * terminate the association at the target. | |
1887 | */ | |
1888 | static void | |
1889 | nvme_fc_free_queue(struct nvme_fc_queue *queue) | |
1890 | { | |
1891 | if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) | |
1892 | return; | |
1893 | ||
9e0ed16a | 1894 | clear_bit(NVME_FC_Q_LIVE, &queue->flags); |
e399441d JS |
1895 | /* |
1896 | * Current implementation never disconnects a single queue. | |
1897 | * It always terminates a whole association. So there is never | |
1898 | * a disconnect(queue) LS sent to the target. | |
1899 | */ | |
1900 | ||
1901 | queue->connection_id = 0; | |
3e493c00 | 1902 | atomic_set(&queue->csn, 1); |
e399441d JS |
1903 | } |
1904 | ||
1905 | static void | |
1906 | __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1907 | struct nvme_fc_queue *queue, unsigned int qidx) | |
1908 | { | |
1909 | if (ctrl->lport->ops->delete_queue) | |
1910 | ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, | |
1911 | queue->lldd_handle); | |
1912 | queue->lldd_handle = NULL; | |
1913 | } | |
1914 | ||
e399441d JS |
1915 | static void |
1916 | nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) | |
1917 | { | |
1918 | int i; | |
1919 | ||
d858e5f0 | 1920 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
e399441d JS |
1921 | nvme_fc_free_queue(&ctrl->queues[i]); |
1922 | } | |
1923 | ||
1924 | static int | |
1925 | __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, | |
1926 | struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) | |
1927 | { | |
1928 | int ret = 0; | |
1929 | ||
1930 | queue->lldd_handle = NULL; | |
1931 | if (ctrl->lport->ops->create_queue) | |
1932 | ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, | |
1933 | qidx, qsize, &queue->lldd_handle); | |
1934 | ||
1935 | return ret; | |
1936 | } | |
1937 | ||
1938 | static void | |
1939 | nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) | |
1940 | { | |
d858e5f0 | 1941 | struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; |
e399441d JS |
1942 | int i; |
1943 | ||
d858e5f0 | 1944 | for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) |
e399441d JS |
1945 | __nvme_fc_delete_hw_queue(ctrl, queue, i); |
1946 | } | |
1947 | ||
1948 | static int | |
1949 | nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1950 | { | |
1951 | struct nvme_fc_queue *queue = &ctrl->queues[1]; | |
17a1ec08 | 1952 | int i, ret; |
e399441d | 1953 | |
d858e5f0 | 1954 | for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { |
e399441d | 1955 | ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); |
17a1ec08 JT |
1956 | if (ret) |
1957 | goto delete_queues; | |
e399441d JS |
1958 | } |
1959 | ||
1960 | return 0; | |
17a1ec08 JT |
1961 | |
1962 | delete_queues: | |
1963 | for (; i >= 0; i--) | |
1964 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); | |
1965 | return ret; | |
e399441d JS |
1966 | } |
1967 | ||
1968 | static int | |
1969 | nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) | |
1970 | { | |
1971 | int i, ret = 0; | |
1972 | ||
d858e5f0 | 1973 | for (i = 1; i < ctrl->ctrl.queue_count; i++) { |
e399441d JS |
1974 | ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, |
1975 | (qsize / 5)); | |
1976 | if (ret) | |
1977 | break; | |
1978 | ret = nvmf_connect_io_queue(&ctrl->ctrl, i); | |
1979 | if (ret) | |
1980 | break; | |
9e0ed16a SG |
1981 | |
1982 | set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags); | |
e399441d JS |
1983 | } |
1984 | ||
1985 | return ret; | |
1986 | } | |
1987 | ||
1988 | static void | |
1989 | nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) | |
1990 | { | |
1991 | int i; | |
1992 | ||
d858e5f0 | 1993 | for (i = 1; i < ctrl->ctrl.queue_count; i++) |
08e15075 | 1994 | nvme_fc_init_queue(ctrl, i); |
e399441d JS |
1995 | } |
1996 | ||
1997 | static void | |
1998 | nvme_fc_ctrl_free(struct kref *ref) | |
1999 | { | |
2000 | struct nvme_fc_ctrl *ctrl = | |
2001 | container_of(ref, struct nvme_fc_ctrl, ref); | |
2002 | unsigned long flags; | |
2003 | ||
61bff8ef JS |
2004 | if (ctrl->ctrl.tagset) { |
2005 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
2006 | blk_mq_free_tag_set(&ctrl->tag_set); | |
e399441d JS |
2007 | } |
2008 | ||
61bff8ef JS |
2009 | /* remove from rport list */ |
2010 | spin_lock_irqsave(&ctrl->rport->lock, flags); | |
2011 | list_del(&ctrl->ctrl_list); | |
2012 | spin_unlock_irqrestore(&ctrl->rport->lock, flags); | |
2013 | ||
f9c5af5f | 2014 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2015 | blk_cleanup_queue(ctrl->ctrl.admin_q); |
2016 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
2017 | ||
2018 | kfree(ctrl->queues); | |
2019 | ||
e399441d JS |
2020 | put_device(ctrl->dev); |
2021 | nvme_fc_rport_put(ctrl->rport); | |
2022 | ||
e399441d | 2023 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
de41447a EM |
2024 | if (ctrl->ctrl.opts) |
2025 | nvmf_free_options(ctrl->ctrl.opts); | |
e399441d JS |
2026 | kfree(ctrl); |
2027 | } | |
2028 | ||
2029 | static void | |
2030 | nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) | |
2031 | { | |
2032 | kref_put(&ctrl->ref, nvme_fc_ctrl_free); | |
2033 | } | |
2034 | ||
2035 | static int | |
2036 | nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) | |
2037 | { | |
2038 | return kref_get_unless_zero(&ctrl->ref); | |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | * All accesses from nvme core layer done - can now free the | |
2043 | * controller. Called after last nvme_put_ctrl() call | |
2044 | */ | |
2045 | static void | |
61bff8ef | 2046 | nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) |
e399441d JS |
2047 | { |
2048 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2049 | ||
2050 | WARN_ON(nctrl != &ctrl->ctrl); | |
2051 | ||
61bff8ef JS |
2052 | nvme_fc_ctrl_put(ctrl); |
2053 | } | |
e399441d | 2054 | |
61bff8ef JS |
2055 | static void |
2056 | nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) | |
2057 | { | |
4cff280a JS |
2058 | int active; |
2059 | ||
2060 | /* | |
2061 | * if an error (io timeout, etc) while (re)connecting, | |
2062 | * it's an error on creating the new association. | |
2063 | * Start the error recovery thread if it hasn't already | |
2064 | * been started. It is expected there could be multiple | |
2065 | * ios hitting this path before things are cleaned up. | |
2066 | */ | |
2067 | if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) { | |
2068 | active = atomic_xchg(&ctrl->err_work_active, 1); | |
2069 | if (!active && !schedule_work(&ctrl->err_work)) { | |
2070 | atomic_set(&ctrl->err_work_active, 0); | |
2071 | WARN_ON(1); | |
2072 | } | |
2073 | return; | |
2074 | } | |
2075 | ||
2076 | /* Otherwise, only proceed if in LIVE state - e.g. on first error */ | |
69fa9646 JS |
2077 | if (ctrl->ctrl.state != NVME_CTRL_LIVE) |
2078 | return; | |
2079 | ||
61bff8ef JS |
2080 | dev_warn(ctrl->ctrl.device, |
2081 | "NVME-FC{%d}: transport association error detected: %s\n", | |
2082 | ctrl->cnum, errmsg); | |
589ff775 | 2083 | dev_warn(ctrl->ctrl.device, |
61bff8ef | 2084 | "NVME-FC{%d}: resetting controller\n", ctrl->cnum); |
e399441d | 2085 | |
d86c4d8e | 2086 | nvme_reset_ctrl(&ctrl->ctrl); |
e399441d JS |
2087 | } |
2088 | ||
baee29ac | 2089 | static enum blk_eh_timer_return |
e399441d JS |
2090 | nvme_fc_timeout(struct request *rq, bool reserved) |
2091 | { | |
2092 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2093 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
e399441d JS |
2094 | |
2095 | /* | |
61bff8ef | 2096 | * we can't individually ABTS an io without affecting the queue, |
041018c6 | 2097 | * thus killing the queue, and thus the association. |
61bff8ef JS |
2098 | * So resolve by performing a controller reset, which will stop |
2099 | * the host/io stack, terminate the association on the link, | |
2100 | * and recreate an association on the link. | |
e399441d | 2101 | */ |
61bff8ef | 2102 | nvme_fc_error_recovery(ctrl, "io timeout error"); |
e399441d | 2103 | |
134aedc9 JS |
2104 | /* |
2105 | * the io abort has been initiated. Have the reset timer | |
2106 | * restarted and the abort completion will complete the io | |
2107 | * shortly. Avoids a synchronous wait while the abort finishes. | |
2108 | */ | |
2109 | return BLK_EH_RESET_TIMER; | |
e399441d JS |
2110 | } |
2111 | ||
2112 | static int | |
2113 | nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
2114 | struct nvme_fc_fcp_op *op) | |
2115 | { | |
2116 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
e399441d JS |
2117 | enum dma_data_direction dir; |
2118 | int ret; | |
2119 | ||
2120 | freq->sg_cnt = 0; | |
2121 | ||
b131c61d | 2122 | if (!blk_rq_payload_bytes(rq)) |
e399441d JS |
2123 | return 0; |
2124 | ||
2125 | freq->sg_table.sgl = freq->first_sgl; | |
19e420bb CH |
2126 | ret = sg_alloc_table_chained(&freq->sg_table, |
2127 | blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); | |
e399441d JS |
2128 | if (ret) |
2129 | return -ENOMEM; | |
2130 | ||
2131 | op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); | |
19e420bb | 2132 | WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); |
e399441d JS |
2133 | dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
2134 | freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, | |
2135 | op->nents, dir); | |
2136 | if (unlikely(freq->sg_cnt <= 0)) { | |
2137 | sg_free_table_chained(&freq->sg_table, true); | |
2138 | freq->sg_cnt = 0; | |
2139 | return -EFAULT; | |
2140 | } | |
2141 | ||
2142 | /* | |
2143 | * TODO: blk_integrity_rq(rq) for DIF | |
2144 | */ | |
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | static void | |
2149 | nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, | |
2150 | struct nvme_fc_fcp_op *op) | |
2151 | { | |
2152 | struct nvmefc_fcp_req *freq = &op->fcp_req; | |
2153 | ||
2154 | if (!freq->sg_cnt) | |
2155 | return; | |
2156 | ||
2157 | fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, | |
2158 | ((rq_data_dir(rq) == WRITE) ? | |
2159 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
2160 | ||
2161 | nvme_cleanup_cmd(rq); | |
2162 | ||
2163 | sg_free_table_chained(&freq->sg_table, true); | |
2164 | ||
2165 | freq->sg_cnt = 0; | |
2166 | } | |
2167 | ||
2168 | /* | |
2169 | * In FC, the queue is a logical thing. At transport connect, the target | |
2170 | * creates its "queue" and returns a handle that is to be given to the | |
2171 | * target whenever it posts something to the corresponding SQ. When an | |
2172 | * SQE is sent on a SQ, FC effectively considers the SQE, or rather the | |
2173 | * command contained within the SQE, an io, and assigns a FC exchange | |
2174 | * to it. The SQE and the associated SQ handle are sent in the initial | |
2175 | * CMD IU sents on the exchange. All transfers relative to the io occur | |
2176 | * as part of the exchange. The CQE is the last thing for the io, | |
2177 | * which is transferred (explicitly or implicitly) with the RSP IU | |
2178 | * sent on the exchange. After the CQE is received, the FC exchange is | |
2179 | * terminaed and the Exchange may be used on a different io. | |
2180 | * | |
2181 | * The transport to LLDD api has the transport making a request for a | |
2182 | * new fcp io request to the LLDD. The LLDD then allocates a FC exchange | |
2183 | * resource and transfers the command. The LLDD will then process all | |
2184 | * steps to complete the io. Upon completion, the transport done routine | |
2185 | * is called. | |
2186 | * | |
2187 | * So - while the operation is outstanding to the LLDD, there is a link | |
2188 | * level FC exchange resource that is also outstanding. This must be | |
2189 | * considered in all cleanup operations. | |
2190 | */ | |
fc17b653 | 2191 | static blk_status_t |
e399441d JS |
2192 | nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, |
2193 | struct nvme_fc_fcp_op *op, u32 data_len, | |
2194 | enum nvmefc_fcp_datadir io_dir) | |
2195 | { | |
2196 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2197 | struct nvme_command *sqe = &cmdiu->sqe; | |
2198 | u32 csn; | |
b12740d3 | 2199 | int ret, opstate; |
e399441d | 2200 | |
61bff8ef JS |
2201 | /* |
2202 | * before attempting to send the io, check to see if we believe | |
2203 | * the target device is present | |
2204 | */ | |
2205 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) | |
86ff7c2a | 2206 | return BLK_STS_RESOURCE; |
61bff8ef | 2207 | |
e399441d | 2208 | if (!nvme_fc_ctrl_get(ctrl)) |
fc17b653 | 2209 | return BLK_STS_IOERR; |
e399441d JS |
2210 | |
2211 | /* format the FC-NVME CMD IU and fcp_req */ | |
2212 | cmdiu->connection_id = cpu_to_be64(queue->connection_id); | |
2213 | csn = atomic_inc_return(&queue->csn); | |
2214 | cmdiu->csn = cpu_to_be32(csn); | |
2215 | cmdiu->data_len = cpu_to_be32(data_len); | |
2216 | switch (io_dir) { | |
2217 | case NVMEFC_FCP_WRITE: | |
2218 | cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; | |
2219 | break; | |
2220 | case NVMEFC_FCP_READ: | |
2221 | cmdiu->flags = FCNVME_CMD_FLAGS_READ; | |
2222 | break; | |
2223 | case NVMEFC_FCP_NODATA: | |
2224 | cmdiu->flags = 0; | |
2225 | break; | |
2226 | } | |
2227 | op->fcp_req.payload_length = data_len; | |
2228 | op->fcp_req.io_dir = io_dir; | |
2229 | op->fcp_req.transferred_length = 0; | |
2230 | op->fcp_req.rcv_rsplen = 0; | |
62eeacb0 | 2231 | op->fcp_req.status = NVME_SC_SUCCESS; |
e399441d JS |
2232 | op->fcp_req.sqid = cpu_to_le16(queue->qnum); |
2233 | ||
2234 | /* | |
2235 | * validate per fabric rules, set fields mandated by fabric spec | |
2236 | * as well as those by FC-NVME spec. | |
2237 | */ | |
2238 | WARN_ON_ONCE(sqe->common.metadata); | |
e399441d JS |
2239 | sqe->common.flags |= NVME_CMD_SGL_METABUF; |
2240 | ||
2241 | /* | |
d9d34c0b JS |
2242 | * format SQE DPTR field per FC-NVME rules: |
2243 | * type=0x5 Transport SGL Data Block Descriptor | |
2244 | * subtype=0xA Transport-specific value | |
2245 | * address=0 | |
2246 | * length=length of the data series | |
e399441d | 2247 | */ |
d9d34c0b JS |
2248 | sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | |
2249 | NVME_SGL_FMT_TRANSPORT_A; | |
e399441d JS |
2250 | sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); |
2251 | sqe->rw.dptr.sgl.addr = 0; | |
2252 | ||
78a7ac26 | 2253 | if (!(op->flags & FCOP_FLAGS_AEN)) { |
e399441d JS |
2254 | ret = nvme_fc_map_data(ctrl, op->rq, op); |
2255 | if (ret < 0) { | |
e399441d JS |
2256 | nvme_cleanup_cmd(op->rq); |
2257 | nvme_fc_ctrl_put(ctrl); | |
fc17b653 CH |
2258 | if (ret == -ENOMEM || ret == -EAGAIN) |
2259 | return BLK_STS_RESOURCE; | |
2260 | return BLK_STS_IOERR; | |
e399441d JS |
2261 | } |
2262 | } | |
2263 | ||
2264 | fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, | |
2265 | sizeof(op->cmd_iu), DMA_TO_DEVICE); | |
2266 | ||
2267 | atomic_set(&op->state, FCPOP_STATE_ACTIVE); | |
2268 | ||
78a7ac26 | 2269 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d JS |
2270 | blk_mq_start_request(op->rq); |
2271 | ||
2272 | ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, | |
2273 | &ctrl->rport->remoteport, | |
2274 | queue->lldd_handle, &op->fcp_req); | |
2275 | ||
2276 | if (ret) { | |
b12740d3 JS |
2277 | opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE); |
2278 | __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); | |
2279 | ||
8b25f351 | 2280 | if (!(op->flags & FCOP_FLAGS_AEN)) |
e399441d | 2281 | nvme_fc_unmap_data(ctrl, op->rq, op); |
e399441d JS |
2282 | |
2283 | nvme_fc_ctrl_put(ctrl); | |
2284 | ||
8b25f351 JS |
2285 | if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && |
2286 | ret != -EBUSY) | |
fc17b653 | 2287 | return BLK_STS_IOERR; |
e399441d | 2288 | |
86ff7c2a | 2289 | return BLK_STS_RESOURCE; |
e399441d JS |
2290 | } |
2291 | ||
fc17b653 | 2292 | return BLK_STS_OK; |
e399441d JS |
2293 | } |
2294 | ||
fc17b653 | 2295 | static blk_status_t |
e399441d JS |
2296 | nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, |
2297 | const struct blk_mq_queue_data *bd) | |
2298 | { | |
2299 | struct nvme_ns *ns = hctx->queue->queuedata; | |
2300 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2301 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2302 | struct request *rq = bd->rq; | |
2303 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2304 | struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; | |
2305 | struct nvme_command *sqe = &cmdiu->sqe; | |
2306 | enum nvmefc_fcp_datadir io_dir; | |
3bc32bb1 | 2307 | bool queue_ready = test_bit(NVME_FC_Q_LIVE, &queue->flags); |
e399441d | 2308 | u32 data_len; |
fc17b653 | 2309 | blk_status_t ret; |
e399441d | 2310 | |
3bc32bb1 CH |
2311 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE || |
2312 | !nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) | |
6cdefc6e | 2313 | return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq); |
9e0ed16a | 2314 | |
e399441d JS |
2315 | ret = nvme_setup_cmd(ns, rq, sqe); |
2316 | if (ret) | |
2317 | return ret; | |
2318 | ||
b131c61d | 2319 | data_len = blk_rq_payload_bytes(rq); |
e399441d JS |
2320 | if (data_len) |
2321 | io_dir = ((rq_data_dir(rq) == WRITE) ? | |
2322 | NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); | |
2323 | else | |
2324 | io_dir = NVMEFC_FCP_NODATA; | |
2325 | ||
2326 | return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); | |
2327 | } | |
2328 | ||
2329 | static struct blk_mq_tags * | |
2330 | nvme_fc_tagset(struct nvme_fc_queue *queue) | |
2331 | { | |
2332 | if (queue->qnum == 0) | |
2333 | return queue->ctrl->admin_tag_set.tags[queue->qnum]; | |
2334 | ||
2335 | return queue->ctrl->tag_set.tags[queue->qnum - 1]; | |
2336 | } | |
2337 | ||
2338 | static int | |
2339 | nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) | |
2340 | ||
2341 | { | |
2342 | struct nvme_fc_queue *queue = hctx->driver_data; | |
2343 | struct nvme_fc_ctrl *ctrl = queue->ctrl; | |
2344 | struct request *req; | |
2345 | struct nvme_fc_fcp_op *op; | |
2346 | ||
2347 | req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); | |
61bff8ef | 2348 | if (!req) |
e399441d | 2349 | return 0; |
e399441d JS |
2350 | |
2351 | op = blk_mq_rq_to_pdu(req); | |
2352 | ||
2353 | if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && | |
2354 | (ctrl->lport->ops->poll_queue)) | |
2355 | ctrl->lport->ops->poll_queue(&ctrl->lport->localport, | |
2356 | queue->lldd_handle); | |
2357 | ||
2358 | return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); | |
2359 | } | |
2360 | ||
2361 | static void | |
ad22c355 | 2362 | nvme_fc_submit_async_event(struct nvme_ctrl *arg) |
e399441d JS |
2363 | { |
2364 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); | |
2365 | struct nvme_fc_fcp_op *aen_op; | |
61bff8ef JS |
2366 | unsigned long flags; |
2367 | bool terminating = false; | |
fc17b653 | 2368 | blk_status_t ret; |
e399441d | 2369 | |
61bff8ef JS |
2370 | spin_lock_irqsave(&ctrl->lock, flags); |
2371 | if (ctrl->flags & FCCTRL_TERMIO) | |
2372 | terminating = true; | |
2373 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2374 | ||
2375 | if (terminating) | |
2376 | return; | |
2377 | ||
ad22c355 | 2378 | aen_op = &ctrl->aen_ops[0]; |
e399441d JS |
2379 | |
2380 | ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, | |
2381 | NVMEFC_FCP_NODATA); | |
2382 | if (ret) | |
2383 | dev_err(ctrl->ctrl.device, | |
ad22c355 | 2384 | "failed async event work\n"); |
e399441d JS |
2385 | } |
2386 | ||
2387 | static void | |
c3aedd22 | 2388 | nvme_fc_complete_rq(struct request *rq) |
e399441d JS |
2389 | { |
2390 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); | |
2391 | struct nvme_fc_ctrl *ctrl = op->ctrl; | |
e399441d | 2392 | |
78a7ac26 | 2393 | atomic_set(&op->state, FCPOP_STATE_IDLE); |
e399441d | 2394 | |
e399441d | 2395 | nvme_fc_unmap_data(ctrl, rq, op); |
77f02a7a | 2396 | nvme_complete_rq(rq); |
e399441d | 2397 | nvme_fc_ctrl_put(ctrl); |
78a7ac26 JS |
2398 | } |
2399 | ||
e399441d JS |
2400 | /* |
2401 | * This routine is used by the transport when it needs to find active | |
2402 | * io on a queue that is to be terminated. The transport uses | |
2403 | * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke | |
2404 | * this routine to kill them on a 1 by 1 basis. | |
2405 | * | |
2406 | * As FC allocates FC exchange for each io, the transport must contact | |
2407 | * the LLDD to terminate the exchange, thus releasing the FC exchange. | |
2408 | * After terminating the exchange the LLDD will call the transport's | |
2409 | * normal io done path for the request, but it will have an aborted | |
2410 | * status. The done path will return the io request back to the block | |
2411 | * layer with an error status. | |
2412 | */ | |
2413 | static void | |
2414 | nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) | |
2415 | { | |
2416 | struct nvme_ctrl *nctrl = data; | |
2417 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); | |
2418 | struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); | |
e399441d | 2419 | |
3efd6e8e | 2420 | __nvme_fc_abort_op(ctrl, op); |
e399441d JS |
2421 | } |
2422 | ||
78a7ac26 | 2423 | |
61bff8ef JS |
2424 | static const struct blk_mq_ops nvme_fc_mq_ops = { |
2425 | .queue_rq = nvme_fc_queue_rq, | |
2426 | .complete = nvme_fc_complete_rq, | |
2427 | .init_request = nvme_fc_init_request, | |
2428 | .exit_request = nvme_fc_exit_request, | |
61bff8ef JS |
2429 | .init_hctx = nvme_fc_init_hctx, |
2430 | .poll = nvme_fc_poll, | |
2431 | .timeout = nvme_fc_timeout, | |
2432 | }; | |
e399441d | 2433 | |
61bff8ef JS |
2434 | static int |
2435 | nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) | |
e399441d | 2436 | { |
61bff8ef | 2437 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; |
7314183d | 2438 | unsigned int nr_io_queues; |
61bff8ef | 2439 | int ret; |
e399441d | 2440 | |
7314183d SG |
2441 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2442 | ctrl->lport->ops->max_hw_queues); | |
2443 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
61bff8ef JS |
2444 | if (ret) { |
2445 | dev_info(ctrl->ctrl.device, | |
2446 | "set_queue_count failed: %d\n", ret); | |
2447 | return ret; | |
2448 | } | |
e399441d | 2449 | |
7314183d SG |
2450 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
2451 | if (!nr_io_queues) | |
61bff8ef | 2452 | return 0; |
e399441d | 2453 | |
61bff8ef | 2454 | nvme_fc_init_io_queues(ctrl); |
e399441d | 2455 | |
61bff8ef JS |
2456 | memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); |
2457 | ctrl->tag_set.ops = &nvme_fc_mq_ops; | |
2458 | ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; | |
2459 | ctrl->tag_set.reserved_tags = 1; /* fabric connect */ | |
2460 | ctrl->tag_set.numa_node = NUMA_NO_NODE; | |
2461 | ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; | |
d3d0bc78 BVA |
2462 | ctrl->tag_set.cmd_size = |
2463 | struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv, | |
2464 | ctrl->lport->ops->fcprqst_priv_sz); | |
61bff8ef | 2465 | ctrl->tag_set.driver_data = ctrl; |
d858e5f0 | 2466 | ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; |
61bff8ef | 2467 | ctrl->tag_set.timeout = NVME_IO_TIMEOUT; |
e399441d | 2468 | |
61bff8ef JS |
2469 | ret = blk_mq_alloc_tag_set(&ctrl->tag_set); |
2470 | if (ret) | |
2471 | return ret; | |
e399441d | 2472 | |
61bff8ef | 2473 | ctrl->ctrl.tagset = &ctrl->tag_set; |
e399441d | 2474 | |
61bff8ef JS |
2475 | ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); |
2476 | if (IS_ERR(ctrl->ctrl.connect_q)) { | |
2477 | ret = PTR_ERR(ctrl->ctrl.connect_q); | |
2478 | goto out_free_tag_set; | |
2479 | } | |
e399441d | 2480 | |
d157e534 | 2481 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1); |
e399441d | 2482 | if (ret) |
61bff8ef | 2483 | goto out_cleanup_blk_queue; |
e399441d | 2484 | |
d157e534 | 2485 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1); |
61bff8ef JS |
2486 | if (ret) |
2487 | goto out_delete_hw_queues; | |
e399441d | 2488 | |
4c984154 JS |
2489 | ctrl->ioq_live = true; |
2490 | ||
e399441d | 2491 | return 0; |
e399441d | 2492 | |
61bff8ef JS |
2493 | out_delete_hw_queues: |
2494 | nvme_fc_delete_hw_io_queues(ctrl); | |
2495 | out_cleanup_blk_queue: | |
61bff8ef JS |
2496 | blk_cleanup_queue(ctrl->ctrl.connect_q); |
2497 | out_free_tag_set: | |
2498 | blk_mq_free_tag_set(&ctrl->tag_set); | |
2499 | nvme_fc_free_io_queues(ctrl); | |
e399441d | 2500 | |
61bff8ef JS |
2501 | /* force put free routine to ignore io queues */ |
2502 | ctrl->ctrl.tagset = NULL; | |
2503 | ||
2504 | return ret; | |
2505 | } | |
e399441d JS |
2506 | |
2507 | static int | |
3e493c00 | 2508 | nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl) |
e399441d JS |
2509 | { |
2510 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
7314183d | 2511 | unsigned int nr_io_queues; |
e399441d JS |
2512 | int ret; |
2513 | ||
7314183d SG |
2514 | nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), |
2515 | ctrl->lport->ops->max_hw_queues); | |
2516 | ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); | |
e399441d JS |
2517 | if (ret) { |
2518 | dev_info(ctrl->ctrl.device, | |
2519 | "set_queue_count failed: %d\n", ret); | |
2520 | return ret; | |
2521 | } | |
2522 | ||
7314183d | 2523 | ctrl->ctrl.queue_count = nr_io_queues + 1; |
61bff8ef | 2524 | /* check for io queues existing */ |
d858e5f0 | 2525 | if (ctrl->ctrl.queue_count == 1) |
e399441d JS |
2526 | return 0; |
2527 | ||
d157e534 | 2528 | ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1); |
e399441d | 2529 | if (ret) |
61bff8ef | 2530 | goto out_free_io_queues; |
e399441d | 2531 | |
d157e534 | 2532 | ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1); |
e399441d JS |
2533 | if (ret) |
2534 | goto out_delete_hw_queues; | |
2535 | ||
cda5fd1a SG |
2536 | blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); |
2537 | ||
e399441d JS |
2538 | return 0; |
2539 | ||
2540 | out_delete_hw_queues: | |
2541 | nvme_fc_delete_hw_io_queues(ctrl); | |
61bff8ef | 2542 | out_free_io_queues: |
e399441d | 2543 | nvme_fc_free_io_queues(ctrl); |
61bff8ef JS |
2544 | return ret; |
2545 | } | |
e399441d | 2546 | |
158bfb88 JS |
2547 | static void |
2548 | nvme_fc_rport_active_on_lport(struct nvme_fc_rport *rport) | |
2549 | { | |
2550 | struct nvme_fc_lport *lport = rport->lport; | |
2551 | ||
2552 | atomic_inc(&lport->act_rport_cnt); | |
2553 | } | |
2554 | ||
2555 | static void | |
2556 | nvme_fc_rport_inactive_on_lport(struct nvme_fc_rport *rport) | |
2557 | { | |
2558 | struct nvme_fc_lport *lport = rport->lport; | |
2559 | u32 cnt; | |
2560 | ||
2561 | cnt = atomic_dec_return(&lport->act_rport_cnt); | |
2562 | if (cnt == 0 && lport->localport.port_state == FC_OBJSTATE_DELETED) | |
2563 | lport->ops->localport_delete(&lport->localport); | |
2564 | } | |
2565 | ||
2566 | static int | |
2567 | nvme_fc_ctlr_active_on_rport(struct nvme_fc_ctrl *ctrl) | |
2568 | { | |
2569 | struct nvme_fc_rport *rport = ctrl->rport; | |
2570 | u32 cnt; | |
2571 | ||
2572 | if (ctrl->assoc_active) | |
2573 | return 1; | |
2574 | ||
2575 | ctrl->assoc_active = true; | |
2576 | cnt = atomic_inc_return(&rport->act_ctrl_cnt); | |
2577 | if (cnt == 1) | |
2578 | nvme_fc_rport_active_on_lport(rport); | |
2579 | ||
2580 | return 0; | |
2581 | } | |
2582 | ||
2583 | static int | |
2584 | nvme_fc_ctlr_inactive_on_rport(struct nvme_fc_ctrl *ctrl) | |
2585 | { | |
2586 | struct nvme_fc_rport *rport = ctrl->rport; | |
2587 | struct nvme_fc_lport *lport = rport->lport; | |
2588 | u32 cnt; | |
2589 | ||
2590 | /* ctrl->assoc_active=false will be set independently */ | |
2591 | ||
2592 | cnt = atomic_dec_return(&rport->act_ctrl_cnt); | |
2593 | if (cnt == 0) { | |
2594 | if (rport->remoteport.port_state == FC_OBJSTATE_DELETED) | |
2595 | lport->ops->remoteport_delete(&rport->remoteport); | |
2596 | nvme_fc_rport_inactive_on_lport(rport); | |
2597 | } | |
2598 | ||
2599 | return 0; | |
2600 | } | |
2601 | ||
61bff8ef JS |
2602 | /* |
2603 | * This routine restarts the controller on the host side, and | |
2604 | * on the link side, recreates the controller association. | |
2605 | */ | |
2606 | static int | |
2607 | nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) | |
2608 | { | |
2609 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
61bff8ef JS |
2610 | int ret; |
2611 | bool changed; | |
2612 | ||
fdf9dfa8 | 2613 | ++ctrl->ctrl.nr_reconnects; |
61bff8ef | 2614 | |
96e24801 JS |
2615 | if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) |
2616 | return -ENODEV; | |
2617 | ||
158bfb88 JS |
2618 | if (nvme_fc_ctlr_active_on_rport(ctrl)) |
2619 | return -ENOTUNIQ; | |
2620 | ||
61bff8ef JS |
2621 | /* |
2622 | * Create the admin queue | |
2623 | */ | |
2624 | ||
61bff8ef | 2625 | ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, |
d157e534 | 2626 | NVME_AQ_DEPTH); |
61bff8ef JS |
2627 | if (ret) |
2628 | goto out_free_queue; | |
2629 | ||
2630 | ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], | |
d157e534 | 2631 | NVME_AQ_DEPTH, (NVME_AQ_DEPTH / 4)); |
61bff8ef JS |
2632 | if (ret) |
2633 | goto out_delete_hw_queue; | |
2634 | ||
4c984154 | 2635 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2636 | |
2637 | ret = nvmf_connect_admin_queue(&ctrl->ctrl); | |
2638 | if (ret) | |
2639 | goto out_disconnect_admin_queue; | |
2640 | ||
9e0ed16a SG |
2641 | set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); |
2642 | ||
61bff8ef JS |
2643 | /* |
2644 | * Check controller capabilities | |
2645 | * | |
2646 | * todo:- add code to check if ctrl attributes changed from | |
2647 | * prior connection values | |
2648 | */ | |
2649 | ||
20d0dfe6 | 2650 | ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); |
61bff8ef JS |
2651 | if (ret) { |
2652 | dev_err(ctrl->ctrl.device, | |
2653 | "prop_get NVME_REG_CAP failed\n"); | |
2654 | goto out_disconnect_admin_queue; | |
2655 | } | |
2656 | ||
2657 | ctrl->ctrl.sqsize = | |
d157e534 | 2658 | min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap), ctrl->ctrl.sqsize); |
61bff8ef | 2659 | |
20d0dfe6 | 2660 | ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); |
61bff8ef JS |
2661 | if (ret) |
2662 | goto out_disconnect_admin_queue; | |
2663 | ||
ecad0d2c JS |
2664 | ctrl->ctrl.max_hw_sectors = |
2665 | (ctrl->lport->ops->max_sgl_segments - 1) << (PAGE_SHIFT - 9); | |
61bff8ef JS |
2666 | |
2667 | ret = nvme_init_identify(&ctrl->ctrl); | |
2668 | if (ret) | |
2669 | goto out_disconnect_admin_queue; | |
2670 | ||
2671 | /* sanity checks */ | |
2672 | ||
2673 | /* FC-NVME does not have other data in the capsule */ | |
2674 | if (ctrl->ctrl.icdoff) { | |
2675 | dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", | |
2676 | ctrl->ctrl.icdoff); | |
2677 | goto out_disconnect_admin_queue; | |
2678 | } | |
2679 | ||
61bff8ef JS |
2680 | /* FC-NVME supports normal SGL Data Block Descriptors */ |
2681 | ||
2682 | if (opts->queue_size > ctrl->ctrl.maxcmd) { | |
2683 | /* warn if maxcmd is lower than queue_size */ | |
2684 | dev_warn(ctrl->ctrl.device, | |
2685 | "queue_size %zu > ctrl maxcmd %u, reducing " | |
2686 | "to queue_size\n", | |
2687 | opts->queue_size, ctrl->ctrl.maxcmd); | |
2688 | opts->queue_size = ctrl->ctrl.maxcmd; | |
2689 | } | |
2690 | ||
d157e534 JS |
2691 | if (opts->queue_size > ctrl->ctrl.sqsize + 1) { |
2692 | /* warn if sqsize is lower than queue_size */ | |
2693 | dev_warn(ctrl->ctrl.device, | |
2694 | "queue_size %zu > ctrl sqsize %u, clamping down\n", | |
2695 | opts->queue_size, ctrl->ctrl.sqsize + 1); | |
2696 | opts->queue_size = ctrl->ctrl.sqsize + 1; | |
2697 | } | |
2698 | ||
61bff8ef JS |
2699 | ret = nvme_fc_init_aen_ops(ctrl); |
2700 | if (ret) | |
2701 | goto out_term_aen_ops; | |
2702 | ||
2703 | /* | |
2704 | * Create the io queues | |
2705 | */ | |
2706 | ||
d858e5f0 | 2707 | if (ctrl->ctrl.queue_count > 1) { |
4c984154 | 2708 | if (!ctrl->ioq_live) |
61bff8ef JS |
2709 | ret = nvme_fc_create_io_queues(ctrl); |
2710 | else | |
3e493c00 | 2711 | ret = nvme_fc_recreate_io_queues(ctrl); |
61bff8ef JS |
2712 | if (ret) |
2713 | goto out_term_aen_ops; | |
2714 | } | |
2715 | ||
2716 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
61bff8ef | 2717 | |
fdf9dfa8 | 2718 | ctrl->ctrl.nr_reconnects = 0; |
61bff8ef | 2719 | |
44c6ec77 JS |
2720 | if (changed) |
2721 | nvme_start_ctrl(&ctrl->ctrl); | |
61bff8ef JS |
2722 | |
2723 | return 0; /* Success */ | |
2724 | ||
2725 | out_term_aen_ops: | |
2726 | nvme_fc_term_aen_ops(ctrl); | |
61bff8ef JS |
2727 | out_disconnect_admin_queue: |
2728 | /* send a Disconnect(association) LS to fc-nvme target */ | |
2729 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2730 | out_delete_hw_queue: | |
2731 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2732 | out_free_queue: | |
2733 | nvme_fc_free_queue(&ctrl->queues[0]); | |
158bfb88 JS |
2734 | ctrl->assoc_active = false; |
2735 | nvme_fc_ctlr_inactive_on_rport(ctrl); | |
e399441d JS |
2736 | |
2737 | return ret; | |
2738 | } | |
2739 | ||
61bff8ef JS |
2740 | /* |
2741 | * This routine stops operation of the controller on the host side. | |
2742 | * On the host os stack side: Admin and IO queues are stopped, | |
2743 | * outstanding ios on them terminated via FC ABTS. | |
2744 | * On the link side: the association is terminated. | |
2745 | */ | |
2746 | static void | |
2747 | nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) | |
2748 | { | |
2749 | unsigned long flags; | |
2750 | ||
158bfb88 JS |
2751 | if (!ctrl->assoc_active) |
2752 | return; | |
2753 | ctrl->assoc_active = false; | |
2754 | ||
61bff8ef JS |
2755 | spin_lock_irqsave(&ctrl->lock, flags); |
2756 | ctrl->flags |= FCCTRL_TERMIO; | |
2757 | ctrl->iocnt = 0; | |
2758 | spin_unlock_irqrestore(&ctrl->lock, flags); | |
2759 | ||
2760 | /* | |
2761 | * If io queues are present, stop them and terminate all outstanding | |
2762 | * ios on them. As FC allocates FC exchange for each io, the | |
2763 | * transport must contact the LLDD to terminate the exchange, | |
2764 | * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() | |
2765 | * to tell us what io's are busy and invoke a transport routine | |
2766 | * to kill them with the LLDD. After terminating the exchange | |
2767 | * the LLDD will call the transport's normal io done path, but it | |
2768 | * will have an aborted status. The done path will return the | |
2769 | * io requests back to the block layer as part of normal completions | |
2770 | * (but with error status). | |
2771 | */ | |
d858e5f0 | 2772 | if (ctrl->ctrl.queue_count > 1) { |
61bff8ef JS |
2773 | nvme_stop_queues(&ctrl->ctrl); |
2774 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
2775 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2776 | } | |
2777 | ||
2778 | /* | |
2779 | * Other transports, which don't have link-level contexts bound | |
2780 | * to sqe's, would try to gracefully shutdown the controller by | |
2781 | * writing the registers for shutdown and polling (call | |
2782 | * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially | |
2783 | * just aborted and we will wait on those contexts, and given | |
2784 | * there was no indication of how live the controlelr is on the | |
2785 | * link, don't send more io to create more contexts for the | |
2786 | * shutdown. Let the controller fail via keepalive failure if | |
2787 | * its still present. | |
2788 | */ | |
2789 | ||
2790 | /* | |
2791 | * clean up the admin queue. Same thing as above. | |
2792 | * use blk_mq_tagset_busy_itr() and the transport routine to | |
2793 | * terminate the exchanges. | |
2794 | */ | |
4c984154 | 2795 | blk_mq_quiesce_queue(ctrl->ctrl.admin_q); |
61bff8ef JS |
2796 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, |
2797 | nvme_fc_terminate_exchange, &ctrl->ctrl); | |
2798 | ||
2799 | /* kill the aens as they are a separate path */ | |
2800 | nvme_fc_abort_aen_ops(ctrl); | |
2801 | ||
2802 | /* wait for all io that had to be aborted */ | |
8a82dbf1 | 2803 | spin_lock_irq(&ctrl->lock); |
36715cf4 | 2804 | wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); |
61bff8ef | 2805 | ctrl->flags &= ~FCCTRL_TERMIO; |
8a82dbf1 | 2806 | spin_unlock_irq(&ctrl->lock); |
61bff8ef JS |
2807 | |
2808 | nvme_fc_term_aen_ops(ctrl); | |
2809 | ||
2810 | /* | |
2811 | * send a Disconnect(association) LS to fc-nvme target | |
2812 | * Note: could have been sent at top of process, but | |
2813 | * cleaner on link traffic if after the aborts complete. | |
2814 | * Note: if association doesn't exist, association_id will be 0 | |
2815 | */ | |
2816 | if (ctrl->association_id) | |
2817 | nvme_fc_xmt_disconnect_assoc(ctrl); | |
2818 | ||
2819 | if (ctrl->ctrl.tagset) { | |
2820 | nvme_fc_delete_hw_io_queues(ctrl); | |
2821 | nvme_fc_free_io_queues(ctrl); | |
2822 | } | |
2823 | ||
2824 | __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); | |
2825 | nvme_fc_free_queue(&ctrl->queues[0]); | |
158bfb88 | 2826 | |
d625d05e JS |
2827 | /* re-enable the admin_q so anything new can fast fail */ |
2828 | blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); | |
2829 | ||
02d62a8b JS |
2830 | /* resume the io queues so that things will fast fail */ |
2831 | nvme_start_queues(&ctrl->ctrl); | |
2832 | ||
158bfb88 | 2833 | nvme_fc_ctlr_inactive_on_rport(ctrl); |
61bff8ef JS |
2834 | } |
2835 | ||
2836 | static void | |
c5017e85 | 2837 | nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl) |
61bff8ef | 2838 | { |
c5017e85 | 2839 | struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); |
61bff8ef | 2840 | |
4cff280a | 2841 | cancel_work_sync(&ctrl->err_work); |
61bff8ef | 2842 | cancel_delayed_work_sync(&ctrl->connect_work); |
61bff8ef JS |
2843 | /* |
2844 | * kill the association on the link side. this will block | |
2845 | * waiting for io to terminate | |
2846 | */ | |
2847 | nvme_fc_delete_association(ctrl); | |
61bff8ef JS |
2848 | } |
2849 | ||
5bbecdbc JS |
2850 | static void |
2851 | nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) | |
2852 | { | |
2b632970 JS |
2853 | struct nvme_fc_rport *rport = ctrl->rport; |
2854 | struct nvme_fc_remote_port *portptr = &rport->remoteport; | |
2855 | unsigned long recon_delay = ctrl->ctrl.opts->reconnect_delay * HZ; | |
2856 | bool recon = true; | |
5bbecdbc | 2857 | |
ad6a0a52 | 2858 | if (ctrl->ctrl.state != NVME_CTRL_CONNECTING) |
5bbecdbc | 2859 | return; |
5bbecdbc | 2860 | |
2b632970 | 2861 | if (portptr->port_state == FC_OBJSTATE_ONLINE) |
5bbecdbc | 2862 | dev_info(ctrl->ctrl.device, |
2b632970 JS |
2863 | "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", |
2864 | ctrl->cnum, status); | |
2865 | else if (time_after_eq(jiffies, rport->dev_loss_end)) | |
2866 | recon = false; | |
5bbecdbc | 2867 | |
2b632970 JS |
2868 | if (recon && nvmf_should_reconnect(&ctrl->ctrl)) { |
2869 | if (portptr->port_state == FC_OBJSTATE_ONLINE) | |
2870 | dev_info(ctrl->ctrl.device, | |
2871 | "NVME-FC{%d}: Reconnect attempt in %ld " | |
2872 | "seconds\n", | |
2873 | ctrl->cnum, recon_delay / HZ); | |
2874 | else if (time_after(jiffies + recon_delay, rport->dev_loss_end)) | |
2875 | recon_delay = rport->dev_loss_end - jiffies; | |
96e24801 | 2876 | |
2b632970 | 2877 | queue_delayed_work(nvme_wq, &ctrl->connect_work, recon_delay); |
5bbecdbc | 2878 | } else { |
2b632970 JS |
2879 | if (portptr->port_state == FC_OBJSTATE_ONLINE) |
2880 | dev_warn(ctrl->ctrl.device, | |
5bbecdbc | 2881 | "NVME-FC{%d}: Max reconnect attempts (%d) " |
77d0612d | 2882 | "reached.\n", |
fdf9dfa8 | 2883 | ctrl->cnum, ctrl->ctrl.nr_reconnects); |
2b632970 JS |
2884 | else |
2885 | dev_warn(ctrl->ctrl.device, | |
2886 | "NVME-FC{%d}: dev_loss_tmo (%d) expired " | |
77d0612d MG |
2887 | "while waiting for remoteport connectivity.\n", |
2888 | ctrl->cnum, portptr->dev_loss_tmo); | |
c5017e85 | 2889 | WARN_ON(nvme_delete_ctrl(&ctrl->ctrl)); |
5bbecdbc JS |
2890 | } |
2891 | } | |
2892 | ||
61bff8ef | 2893 | static void |
4cff280a | 2894 | __nvme_fc_terminate_io(struct nvme_fc_ctrl *ctrl) |
61bff8ef | 2895 | { |
4cff280a | 2896 | nvme_stop_keep_alive(&ctrl->ctrl); |
44c6ec77 | 2897 | |
61bff8ef JS |
2898 | /* will block will waiting for io to terminate */ |
2899 | nvme_fc_delete_association(ctrl); | |
2900 | ||
4cff280a JS |
2901 | if (ctrl->ctrl.state != NVME_CTRL_CONNECTING && |
2902 | !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) | |
44c6ec77 JS |
2903 | dev_err(ctrl->ctrl.device, |
2904 | "NVME-FC{%d}: error_recovery: Couldn't change state " | |
ad6a0a52 | 2905 | "to CONNECTING\n", ctrl->cnum); |
4cff280a JS |
2906 | } |
2907 | ||
2908 | static void | |
2909 | nvme_fc_reset_ctrl_work(struct work_struct *work) | |
2910 | { | |
2911 | struct nvme_fc_ctrl *ctrl = | |
2912 | container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); | |
2913 | int ret; | |
2914 | ||
2915 | __nvme_fc_terminate_io(ctrl); | |
2916 | ||
2917 | nvme_stop_ctrl(&ctrl->ctrl); | |
44c6ec77 | 2918 | |
2b632970 | 2919 | if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) |
96e24801 | 2920 | ret = nvme_fc_create_association(ctrl); |
2b632970 JS |
2921 | else |
2922 | ret = -ENOTCONN; | |
2923 | ||
5bbecdbc JS |
2924 | if (ret) |
2925 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2926 | else | |
61bff8ef | 2927 | dev_info(ctrl->ctrl.device, |
2b632970 JS |
2928 | "NVME-FC{%d}: controller reset complete\n", |
2929 | ctrl->cnum); | |
61bff8ef JS |
2930 | } |
2931 | ||
4cff280a JS |
2932 | static void |
2933 | nvme_fc_connect_err_work(struct work_struct *work) | |
2934 | { | |
2935 | struct nvme_fc_ctrl *ctrl = | |
2936 | container_of(work, struct nvme_fc_ctrl, err_work); | |
2937 | ||
2938 | __nvme_fc_terminate_io(ctrl); | |
2939 | ||
2940 | atomic_set(&ctrl->err_work_active, 0); | |
2941 | ||
2942 | /* | |
2943 | * Rescheduling the connection after recovering | |
2944 | * from the io error is left to the reconnect work | |
2945 | * item, which is what should have stalled waiting on | |
2946 | * the io that had the error that scheduled this work. | |
2947 | */ | |
2948 | } | |
2949 | ||
61bff8ef JS |
2950 | static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { |
2951 | .name = "fc", | |
2952 | .module = THIS_MODULE, | |
d3d5b87d | 2953 | .flags = NVME_F_FABRICS, |
61bff8ef JS |
2954 | .reg_read32 = nvmf_reg_read32, |
2955 | .reg_read64 = nvmf_reg_read64, | |
2956 | .reg_write32 = nvmf_reg_write32, | |
61bff8ef JS |
2957 | .free_ctrl = nvme_fc_nvme_ctrl_freed, |
2958 | .submit_async_event = nvme_fc_submit_async_event, | |
c5017e85 | 2959 | .delete_ctrl = nvme_fc_delete_ctrl, |
61bff8ef JS |
2960 | .get_address = nvmf_get_address, |
2961 | }; | |
2962 | ||
2963 | static void | |
2964 | nvme_fc_connect_ctrl_work(struct work_struct *work) | |
2965 | { | |
2966 | int ret; | |
2967 | ||
2968 | struct nvme_fc_ctrl *ctrl = | |
2969 | container_of(to_delayed_work(work), | |
2970 | struct nvme_fc_ctrl, connect_work); | |
2971 | ||
2972 | ret = nvme_fc_create_association(ctrl); | |
5bbecdbc JS |
2973 | if (ret) |
2974 | nvme_fc_reconnect_or_delete(ctrl, ret); | |
2975 | else | |
61bff8ef | 2976 | dev_info(ctrl->ctrl.device, |
4c984154 | 2977 | "NVME-FC{%d}: controller connect complete\n", |
61bff8ef JS |
2978 | ctrl->cnum); |
2979 | } | |
2980 | ||
2981 | ||
2982 | static const struct blk_mq_ops nvme_fc_admin_mq_ops = { | |
2983 | .queue_rq = nvme_fc_queue_rq, | |
2984 | .complete = nvme_fc_complete_rq, | |
76f983cb | 2985 | .init_request = nvme_fc_init_request, |
61bff8ef | 2986 | .exit_request = nvme_fc_exit_request, |
61bff8ef JS |
2987 | .init_hctx = nvme_fc_init_admin_hctx, |
2988 | .timeout = nvme_fc_timeout, | |
2989 | }; | |
2990 | ||
e399441d | 2991 | |
56d5f4f1 JS |
2992 | /* |
2993 | * Fails a controller request if it matches an existing controller | |
2994 | * (association) with the same tuple: | |
2995 | * <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN> | |
2996 | * | |
2997 | * The ports don't need to be compared as they are intrinsically | |
2998 | * already matched by the port pointers supplied. | |
2999 | */ | |
3000 | static bool | |
3001 | nvme_fc_existing_controller(struct nvme_fc_rport *rport, | |
3002 | struct nvmf_ctrl_options *opts) | |
3003 | { | |
3004 | struct nvme_fc_ctrl *ctrl; | |
3005 | unsigned long flags; | |
3006 | bool found = false; | |
3007 | ||
3008 | spin_lock_irqsave(&rport->lock, flags); | |
3009 | list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { | |
3010 | found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts); | |
3011 | if (found) | |
3012 | break; | |
3013 | } | |
3014 | spin_unlock_irqrestore(&rport->lock, flags); | |
3015 | ||
3016 | return found; | |
3017 | } | |
3018 | ||
e399441d | 3019 | static struct nvme_ctrl * |
61bff8ef | 3020 | nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, |
e399441d JS |
3021 | struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) |
3022 | { | |
3023 | struct nvme_fc_ctrl *ctrl; | |
3024 | unsigned long flags; | |
4c984154 | 3025 | int ret, idx; |
e399441d | 3026 | |
85e6a6ad JS |
3027 | if (!(rport->remoteport.port_role & |
3028 | (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { | |
3029 | ret = -EBADR; | |
3030 | goto out_fail; | |
3031 | } | |
3032 | ||
56d5f4f1 JS |
3033 | if (!opts->duplicate_connect && |
3034 | nvme_fc_existing_controller(rport, opts)) { | |
3035 | ret = -EALREADY; | |
3036 | goto out_fail; | |
3037 | } | |
3038 | ||
e399441d JS |
3039 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
3040 | if (!ctrl) { | |
3041 | ret = -ENOMEM; | |
3042 | goto out_fail; | |
3043 | } | |
3044 | ||
3045 | idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); | |
3046 | if (idx < 0) { | |
3047 | ret = -ENOSPC; | |
3048 | goto out_free_ctrl; | |
3049 | } | |
3050 | ||
3051 | ctrl->ctrl.opts = opts; | |
4c984154 | 3052 | ctrl->ctrl.nr_reconnects = 0; |
e399441d | 3053 | INIT_LIST_HEAD(&ctrl->ctrl_list); |
e399441d JS |
3054 | ctrl->lport = lport; |
3055 | ctrl->rport = rport; | |
3056 | ctrl->dev = lport->dev; | |
e399441d | 3057 | ctrl->cnum = idx; |
4c984154 | 3058 | ctrl->ioq_live = false; |
158bfb88 | 3059 | ctrl->assoc_active = false; |
4cff280a | 3060 | atomic_set(&ctrl->err_work_active, 0); |
8a82dbf1 | 3061 | init_waitqueue_head(&ctrl->ioabort_wait); |
e399441d | 3062 | |
e399441d JS |
3063 | get_device(ctrl->dev); |
3064 | kref_init(&ctrl->ref); | |
3065 | ||
d86c4d8e | 3066 | INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); |
61bff8ef | 3067 | INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); |
4cff280a | 3068 | INIT_WORK(&ctrl->err_work, nvme_fc_connect_err_work); |
e399441d JS |
3069 | spin_lock_init(&ctrl->lock); |
3070 | ||
3071 | /* io queue count */ | |
d858e5f0 | 3072 | ctrl->ctrl.queue_count = min_t(unsigned int, |
e399441d JS |
3073 | opts->nr_io_queues, |
3074 | lport->ops->max_hw_queues); | |
d858e5f0 | 3075 | ctrl->ctrl.queue_count++; /* +1 for admin queue */ |
e399441d JS |
3076 | |
3077 | ctrl->ctrl.sqsize = opts->queue_size - 1; | |
3078 | ctrl->ctrl.kato = opts->kato; | |
4c984154 | 3079 | ctrl->ctrl.cntlid = 0xffff; |
e399441d JS |
3080 | |
3081 | ret = -ENOMEM; | |
d858e5f0 SG |
3082 | ctrl->queues = kcalloc(ctrl->ctrl.queue_count, |
3083 | sizeof(struct nvme_fc_queue), GFP_KERNEL); | |
e399441d | 3084 | if (!ctrl->queues) |
61bff8ef | 3085 | goto out_free_ida; |
e399441d | 3086 | |
3e493c00 JS |
3087 | nvme_fc_init_queue(ctrl, 0); |
3088 | ||
61bff8ef JS |
3089 | memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); |
3090 | ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; | |
38dabe21 | 3091 | ctrl->admin_tag_set.queue_depth = NVME_AQ_MQ_TAG_DEPTH; |
61bff8ef JS |
3092 | ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ |
3093 | ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; | |
d3d0bc78 BVA |
3094 | ctrl->admin_tag_set.cmd_size = |
3095 | struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv, | |
3096 | ctrl->lport->ops->fcprqst_priv_sz); | |
61bff8ef JS |
3097 | ctrl->admin_tag_set.driver_data = ctrl; |
3098 | ctrl->admin_tag_set.nr_hw_queues = 1; | |
3099 | ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; | |
5a22e2bf | 3100 | ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED; |
e399441d | 3101 | |
61bff8ef | 3102 | ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); |
e399441d | 3103 | if (ret) |
61bff8ef | 3104 | goto out_free_queues; |
34b6c231 | 3105 | ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; |
e399441d | 3106 | |
61bff8ef JS |
3107 | ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); |
3108 | if (IS_ERR(ctrl->ctrl.admin_q)) { | |
3109 | ret = PTR_ERR(ctrl->ctrl.admin_q); | |
3110 | goto out_free_admin_tag_set; | |
e399441d JS |
3111 | } |
3112 | ||
61bff8ef JS |
3113 | /* |
3114 | * Would have been nice to init io queues tag set as well. | |
3115 | * However, we require interaction from the controller | |
3116 | * for max io queue count before we can do so. | |
3117 | * Defer this to the connect path. | |
3118 | */ | |
e399441d | 3119 | |
61bff8ef JS |
3120 | ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); |
3121 | if (ret) | |
3122 | goto out_cleanup_admin_q; | |
e399441d | 3123 | |
61bff8ef | 3124 | /* at this point, teardown path changes to ref counting on nvme ctrl */ |
e399441d JS |
3125 | |
3126 | spin_lock_irqsave(&rport->lock, flags); | |
3127 | list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); | |
3128 | spin_unlock_irqrestore(&rport->lock, flags); | |
3129 | ||
4c984154 JS |
3130 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING) || |
3131 | !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { | |
17c4dc6e | 3132 | dev_err(ctrl->ctrl.device, |
4c984154 JS |
3133 | "NVME-FC{%d}: failed to init ctrl state\n", ctrl->cnum); |
3134 | goto fail_ctrl; | |
3135 | } | |
17c4dc6e | 3136 | |
4c984154 | 3137 | nvme_get_ctrl(&ctrl->ctrl); |
61bff8ef | 3138 | |
4c984154 | 3139 | if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) { |
0b5a7669 | 3140 | nvme_put_ctrl(&ctrl->ctrl); |
4c984154 JS |
3141 | dev_err(ctrl->ctrl.device, |
3142 | "NVME-FC{%d}: failed to schedule initial connect\n", | |
3143 | ctrl->cnum); | |
3144 | goto fail_ctrl; | |
e399441d JS |
3145 | } |
3146 | ||
4c984154 | 3147 | flush_delayed_work(&ctrl->connect_work); |
2cb657bc | 3148 | |
61bff8ef JS |
3149 | dev_info(ctrl->ctrl.device, |
3150 | "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", | |
3151 | ctrl->cnum, ctrl->ctrl.opts->subsysnqn); | |
e399441d | 3152 | |
61bff8ef | 3153 | return &ctrl->ctrl; |
e399441d | 3154 | |
4c984154 JS |
3155 | fail_ctrl: |
3156 | nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING); | |
3157 | cancel_work_sync(&ctrl->ctrl.reset_work); | |
4cff280a | 3158 | cancel_work_sync(&ctrl->err_work); |
4c984154 JS |
3159 | cancel_delayed_work_sync(&ctrl->connect_work); |
3160 | ||
3161 | ctrl->ctrl.opts = NULL; | |
3162 | ||
3163 | /* initiate nvme ctrl ref counting teardown */ | |
3164 | nvme_uninit_ctrl(&ctrl->ctrl); | |
3165 | ||
3166 | /* Remove core ctrl ref. */ | |
3167 | nvme_put_ctrl(&ctrl->ctrl); | |
3168 | ||
3169 | /* as we're past the point where we transition to the ref | |
3170 | * counting teardown path, if we return a bad pointer here, | |
3171 | * the calling routine, thinking it's prior to the | |
3172 | * transition, will do an rport put. Since the teardown | |
3173 | * path also does a rport put, we do an extra get here to | |
3174 | * so proper order/teardown happens. | |
3175 | */ | |
3176 | nvme_fc_rport_get(rport); | |
3177 | ||
3178 | return ERR_PTR(-EIO); | |
3179 | ||
61bff8ef JS |
3180 | out_cleanup_admin_q: |
3181 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
3182 | out_free_admin_tag_set: | |
3183 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
3184 | out_free_queues: | |
3185 | kfree(ctrl->queues); | |
e399441d | 3186 | out_free_ida: |
61bff8ef | 3187 | put_device(ctrl->dev); |
e399441d JS |
3188 | ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); |
3189 | out_free_ctrl: | |
3190 | kfree(ctrl); | |
3191 | out_fail: | |
e399441d JS |
3192 | /* exit via here doesn't follow ctlr ref points */ |
3193 | return ERR_PTR(ret); | |
3194 | } | |
3195 | ||
e399441d JS |
3196 | |
3197 | struct nvmet_fc_traddr { | |
3198 | u64 nn; | |
3199 | u64 pn; | |
3200 | }; | |
3201 | ||
e399441d | 3202 | static int |
9c5358e1 | 3203 | __nvme_fc_parse_u64(substring_t *sstr, u64 *val) |
e399441d | 3204 | { |
e399441d JS |
3205 | u64 token64; |
3206 | ||
9c5358e1 JS |
3207 | if (match_u64(sstr, &token64)) |
3208 | return -EINVAL; | |
3209 | *val = token64; | |
e399441d | 3210 | |
9c5358e1 JS |
3211 | return 0; |
3212 | } | |
e399441d | 3213 | |
9c5358e1 JS |
3214 | /* |
3215 | * This routine validates and extracts the WWN's from the TRADDR string. | |
3216 | * As kernel parsers need the 0x to determine number base, universally | |
3217 | * build string to parse with 0x prefix before parsing name strings. | |
3218 | */ | |
3219 | static int | |
3220 | nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) | |
3221 | { | |
3222 | char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; | |
3223 | substring_t wwn = { name, &name[sizeof(name)-1] }; | |
3224 | int nnoffset, pnoffset; | |
3225 | ||
d4e4230c | 3226 | /* validate if string is one of the 2 allowed formats */ |
9c5358e1 JS |
3227 | if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && |
3228 | !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && | |
3229 | !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], | |
3230 | "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { | |
3231 | nnoffset = NVME_FC_TRADDR_OXNNLEN; | |
3232 | pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + | |
3233 | NVME_FC_TRADDR_OXNNLEN; | |
3234 | } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && | |
3235 | !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && | |
3236 | !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], | |
3237 | "pn-", NVME_FC_TRADDR_NNLEN))) { | |
3238 | nnoffset = NVME_FC_TRADDR_NNLEN; | |
3239 | pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; | |
3240 | } else | |
3241 | goto out_einval; | |
e399441d | 3242 | |
9c5358e1 JS |
3243 | name[0] = '0'; |
3244 | name[1] = 'x'; | |
3245 | name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; | |
3246 | ||
3247 | memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
3248 | if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) | |
3249 | goto out_einval; | |
3250 | ||
3251 | memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); | |
3252 | if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) | |
3253 | goto out_einval; | |
3254 | ||
3255 | return 0; | |
3256 | ||
3257 | out_einval: | |
3258 | pr_warn("%s: bad traddr string\n", __func__); | |
3259 | return -EINVAL; | |
e399441d JS |
3260 | } |
3261 | ||
3262 | static struct nvme_ctrl * | |
3263 | nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) | |
3264 | { | |
3265 | struct nvme_fc_lport *lport; | |
3266 | struct nvme_fc_rport *rport; | |
61bff8ef | 3267 | struct nvme_ctrl *ctrl; |
e399441d JS |
3268 | struct nvmet_fc_traddr laddr = { 0L, 0L }; |
3269 | struct nvmet_fc_traddr raddr = { 0L, 0L }; | |
3270 | unsigned long flags; | |
3271 | int ret; | |
3272 | ||
9c5358e1 | 3273 | ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3274 | if (ret || !raddr.nn || !raddr.pn) |
3275 | return ERR_PTR(-EINVAL); | |
3276 | ||
9c5358e1 | 3277 | ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); |
e399441d JS |
3278 | if (ret || !laddr.nn || !laddr.pn) |
3279 | return ERR_PTR(-EINVAL); | |
3280 | ||
3281 | /* find the host and remote ports to connect together */ | |
3282 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
3283 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
3284 | if (lport->localport.node_name != laddr.nn || | |
3285 | lport->localport.port_name != laddr.pn) | |
3286 | continue; | |
3287 | ||
3288 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
3289 | if (rport->remoteport.node_name != raddr.nn || | |
3290 | rport->remoteport.port_name != raddr.pn) | |
3291 | continue; | |
3292 | ||
3293 | /* if fail to get reference fall through. Will error */ | |
3294 | if (!nvme_fc_rport_get(rport)) | |
3295 | break; | |
3296 | ||
3297 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3298 | ||
61bff8ef JS |
3299 | ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); |
3300 | if (IS_ERR(ctrl)) | |
3301 | nvme_fc_rport_put(rport); | |
3302 | return ctrl; | |
e399441d JS |
3303 | } |
3304 | } | |
3305 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3306 | ||
4fb135ad JT |
3307 | pr_warn("%s: %s - %s combination not found\n", |
3308 | __func__, opts->traddr, opts->host_traddr); | |
e399441d JS |
3309 | return ERR_PTR(-ENOENT); |
3310 | } | |
3311 | ||
3312 | ||
3313 | static struct nvmf_transport_ops nvme_fc_transport = { | |
3314 | .name = "fc", | |
0de5cd36 | 3315 | .module = THIS_MODULE, |
e399441d | 3316 | .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, |
5bbecdbc | 3317 | .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, |
e399441d JS |
3318 | .create_ctrl = nvme_fc_create_ctrl, |
3319 | }; | |
3320 | ||
97faec53 JS |
3321 | /* Arbitrary successive failures max. With lots of subsystems could be high */ |
3322 | #define DISCOVERY_MAX_FAIL 20 | |
3323 | ||
3324 | static ssize_t nvme_fc_nvme_discovery_store(struct device *dev, | |
3325 | struct device_attribute *attr, const char *buf, size_t count) | |
3326 | { | |
3327 | unsigned long flags; | |
3328 | LIST_HEAD(local_disc_list); | |
3329 | struct nvme_fc_lport *lport; | |
3330 | struct nvme_fc_rport *rport; | |
3331 | int failcnt = 0; | |
3332 | ||
3333 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
3334 | restart: | |
3335 | list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { | |
3336 | list_for_each_entry(rport, &lport->endp_list, endp_list) { | |
3337 | if (!nvme_fc_lport_get(lport)) | |
3338 | continue; | |
3339 | if (!nvme_fc_rport_get(rport)) { | |
3340 | /* | |
3341 | * This is a temporary condition. Upon restart | |
3342 | * this rport will be gone from the list. | |
3343 | * | |
3344 | * Revert the lport put and retry. Anything | |
3345 | * added to the list already will be skipped (as | |
3346 | * they are no longer list_empty). Loops should | |
3347 | * resume at rports that were not yet seen. | |
3348 | */ | |
3349 | nvme_fc_lport_put(lport); | |
3350 | ||
3351 | if (failcnt++ < DISCOVERY_MAX_FAIL) | |
3352 | goto restart; | |
3353 | ||
3354 | pr_err("nvme_discovery: too many reference " | |
3355 | "failures\n"); | |
3356 | goto process_local_list; | |
3357 | } | |
3358 | if (list_empty(&rport->disc_list)) | |
3359 | list_add_tail(&rport->disc_list, | |
3360 | &local_disc_list); | |
3361 | } | |
3362 | } | |
3363 | ||
3364 | process_local_list: | |
3365 | while (!list_empty(&local_disc_list)) { | |
3366 | rport = list_first_entry(&local_disc_list, | |
3367 | struct nvme_fc_rport, disc_list); | |
3368 | list_del_init(&rport->disc_list); | |
3369 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3370 | ||
3371 | lport = rport->lport; | |
3372 | /* signal discovery. Won't hurt if it repeats */ | |
3373 | nvme_fc_signal_discovery_scan(lport, rport); | |
3374 | nvme_fc_rport_put(rport); | |
3375 | nvme_fc_lport_put(lport); | |
3376 | ||
3377 | spin_lock_irqsave(&nvme_fc_lock, flags); | |
3378 | } | |
3379 | spin_unlock_irqrestore(&nvme_fc_lock, flags); | |
3380 | ||
3381 | return count; | |
3382 | } | |
3383 | static DEVICE_ATTR(nvme_discovery, 0200, NULL, nvme_fc_nvme_discovery_store); | |
3384 | ||
3385 | static struct attribute *nvme_fc_attrs[] = { | |
3386 | &dev_attr_nvme_discovery.attr, | |
3387 | NULL | |
3388 | }; | |
3389 | ||
3390 | static struct attribute_group nvme_fc_attr_group = { | |
3391 | .attrs = nvme_fc_attrs, | |
3392 | }; | |
3393 | ||
3394 | static const struct attribute_group *nvme_fc_attr_groups[] = { | |
3395 | &nvme_fc_attr_group, | |
3396 | NULL | |
3397 | }; | |
3398 | ||
3399 | static struct class fc_class = { | |
3400 | .name = "fc", | |
3401 | .dev_groups = nvme_fc_attr_groups, | |
3402 | .owner = THIS_MODULE, | |
3403 | }; | |
3404 | ||
e399441d JS |
3405 | static int __init nvme_fc_init_module(void) |
3406 | { | |
5f568556 JS |
3407 | int ret; |
3408 | ||
3409 | /* | |
3410 | * NOTE: | |
3411 | * It is expected that in the future the kernel will combine | |
3412 | * the FC-isms that are currently under scsi and now being | |
3413 | * added to by NVME into a new standalone FC class. The SCSI | |
3414 | * and NVME protocols and their devices would be under this | |
3415 | * new FC class. | |
3416 | * | |
3417 | * As we need something to post FC-specific udev events to, | |
3418 | * specifically for nvme probe events, start by creating the | |
3419 | * new device class. When the new standalone FC class is | |
3420 | * put in place, this code will move to a more generic | |
3421 | * location for the class. | |
3422 | */ | |
97faec53 JS |
3423 | ret = class_register(&fc_class); |
3424 | if (ret) { | |
5f568556 | 3425 | pr_err("couldn't register class fc\n"); |
97faec53 | 3426 | return ret; |
5f568556 JS |
3427 | } |
3428 | ||
3429 | /* | |
3430 | * Create a device for the FC-centric udev events | |
3431 | */ | |
97faec53 | 3432 | fc_udev_device = device_create(&fc_class, NULL, MKDEV(0, 0), NULL, |
5f568556 JS |
3433 | "fc_udev_device"); |
3434 | if (IS_ERR(fc_udev_device)) { | |
3435 | pr_err("couldn't create fc_udev device!\n"); | |
3436 | ret = PTR_ERR(fc_udev_device); | |
3437 | goto out_destroy_class; | |
3438 | } | |
3439 | ||
3440 | ret = nvmf_register_transport(&nvme_fc_transport); | |
3441 | if (ret) | |
3442 | goto out_destroy_device; | |
3443 | ||
3444 | return 0; | |
3445 | ||
3446 | out_destroy_device: | |
97faec53 | 3447 | device_destroy(&fc_class, MKDEV(0, 0)); |
5f568556 | 3448 | out_destroy_class: |
97faec53 | 3449 | class_unregister(&fc_class); |
5f568556 | 3450 | return ret; |
e399441d JS |
3451 | } |
3452 | ||
3453 | static void __exit nvme_fc_exit_module(void) | |
3454 | { | |
3455 | /* sanity check - all lports should be removed */ | |
3456 | if (!list_empty(&nvme_fc_lport_list)) | |
3457 | pr_warn("%s: localport list not empty\n", __func__); | |
3458 | ||
3459 | nvmf_unregister_transport(&nvme_fc_transport); | |
3460 | ||
e399441d JS |
3461 | ida_destroy(&nvme_fc_local_port_cnt); |
3462 | ida_destroy(&nvme_fc_ctrl_cnt); | |
5f568556 | 3463 | |
97faec53 JS |
3464 | device_destroy(&fc_class, MKDEV(0, 0)); |
3465 | class_unregister(&fc_class); | |
e399441d JS |
3466 | } |
3467 | ||
3468 | module_init(nvme_fc_init_module); | |
3469 | module_exit(nvme_fc_exit_module); | |
3470 | ||
3471 | MODULE_LICENSE("GPL v2"); |