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Commit | Line | Data |
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21d34711 CH |
1 | /* |
2 | * NVM Express device driver | |
3 | * Copyright (c) 2011-2014, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
15 | #include <linux/blkdev.h> | |
16 | #include <linux/blk-mq.h> | |
5fd4ce1b | 17 | #include <linux/delay.h> |
21d34711 | 18 | #include <linux/errno.h> |
1673f1f0 | 19 | #include <linux/hdreg.h> |
21d34711 | 20 | #include <linux/kernel.h> |
5bae7f73 CH |
21 | #include <linux/module.h> |
22 | #include <linux/list_sort.h> | |
21d34711 CH |
23 | #include <linux/slab.h> |
24 | #include <linux/types.h> | |
1673f1f0 CH |
25 | #include <linux/pr.h> |
26 | #include <linux/ptrace.h> | |
27 | #include <linux/nvme_ioctl.h> | |
28 | #include <linux/t10-pi.h> | |
29 | #include <scsi/sg.h> | |
30 | #include <asm/unaligned.h> | |
21d34711 CH |
31 | |
32 | #include "nvme.h" | |
038bd4cb | 33 | #include "fabrics.h" |
21d34711 | 34 | |
f3ca80fc CH |
35 | #define NVME_MINORS (1U << MINORBITS) |
36 | ||
ba0ba7d3 ML |
37 | unsigned char admin_timeout = 60; |
38 | module_param(admin_timeout, byte, 0644); | |
39 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); | |
576d55d6 | 40 | EXPORT_SYMBOL_GPL(admin_timeout); |
ba0ba7d3 ML |
41 | |
42 | unsigned char nvme_io_timeout = 30; | |
43 | module_param_named(io_timeout, nvme_io_timeout, byte, 0644); | |
44 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); | |
576d55d6 | 45 | EXPORT_SYMBOL_GPL(nvme_io_timeout); |
ba0ba7d3 ML |
46 | |
47 | unsigned char shutdown_timeout = 5; | |
48 | module_param(shutdown_timeout, byte, 0644); | |
49 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); | |
50 | ||
f80ec966 KB |
51 | unsigned int nvme_max_retries = 5; |
52 | module_param_named(max_retries, nvme_max_retries, uint, 0644); | |
53 | MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); | |
54 | EXPORT_SYMBOL_GPL(nvme_max_retries); | |
5bae7f73 | 55 | |
f3ca80fc CH |
56 | static int nvme_char_major; |
57 | module_param(nvme_char_major, int, 0); | |
58 | ||
59 | static LIST_HEAD(nvme_ctrl_list); | |
9f2482b9 | 60 | static DEFINE_SPINLOCK(dev_list_lock); |
1673f1f0 | 61 | |
f3ca80fc CH |
62 | static struct class *nvme_class; |
63 | ||
c55a2fd4 ML |
64 | void nvme_cancel_request(struct request *req, void *data, bool reserved) |
65 | { | |
66 | int status; | |
67 | ||
68 | if (!blk_mq_request_started(req)) | |
69 | return; | |
70 | ||
71 | dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device, | |
72 | "Cancelling I/O %d", req->tag); | |
73 | ||
74 | status = NVME_SC_ABORT_REQ; | |
75 | if (blk_queue_dying(req->q)) | |
76 | status |= NVME_SC_DNR; | |
77 | blk_mq_complete_request(req, status); | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(nvme_cancel_request); | |
80 | ||
bb8d261e CH |
81 | bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, |
82 | enum nvme_ctrl_state new_state) | |
83 | { | |
f6b6a28e | 84 | enum nvme_ctrl_state old_state; |
bb8d261e CH |
85 | bool changed = false; |
86 | ||
87 | spin_lock_irq(&ctrl->lock); | |
f6b6a28e GKB |
88 | |
89 | old_state = ctrl->state; | |
bb8d261e CH |
90 | switch (new_state) { |
91 | case NVME_CTRL_LIVE: | |
92 | switch (old_state) { | |
7d2e8008 | 93 | case NVME_CTRL_NEW: |
bb8d261e | 94 | case NVME_CTRL_RESETTING: |
def61eca | 95 | case NVME_CTRL_RECONNECTING: |
bb8d261e CH |
96 | changed = true; |
97 | /* FALLTHRU */ | |
98 | default: | |
99 | break; | |
100 | } | |
101 | break; | |
102 | case NVME_CTRL_RESETTING: | |
103 | switch (old_state) { | |
104 | case NVME_CTRL_NEW: | |
def61eca CH |
105 | case NVME_CTRL_LIVE: |
106 | case NVME_CTRL_RECONNECTING: | |
107 | changed = true; | |
108 | /* FALLTHRU */ | |
109 | default: | |
110 | break; | |
111 | } | |
112 | break; | |
113 | case NVME_CTRL_RECONNECTING: | |
114 | switch (old_state) { | |
bb8d261e CH |
115 | case NVME_CTRL_LIVE: |
116 | changed = true; | |
117 | /* FALLTHRU */ | |
118 | default: | |
119 | break; | |
120 | } | |
121 | break; | |
122 | case NVME_CTRL_DELETING: | |
123 | switch (old_state) { | |
124 | case NVME_CTRL_LIVE: | |
125 | case NVME_CTRL_RESETTING: | |
def61eca | 126 | case NVME_CTRL_RECONNECTING: |
bb8d261e CH |
127 | changed = true; |
128 | /* FALLTHRU */ | |
129 | default: | |
130 | break; | |
131 | } | |
132 | break; | |
0ff9d4e1 KB |
133 | case NVME_CTRL_DEAD: |
134 | switch (old_state) { | |
135 | case NVME_CTRL_DELETING: | |
136 | changed = true; | |
137 | /* FALLTHRU */ | |
138 | default: | |
139 | break; | |
140 | } | |
141 | break; | |
bb8d261e CH |
142 | default: |
143 | break; | |
144 | } | |
bb8d261e CH |
145 | |
146 | if (changed) | |
147 | ctrl->state = new_state; | |
148 | ||
f6b6a28e GKB |
149 | spin_unlock_irq(&ctrl->lock); |
150 | ||
bb8d261e CH |
151 | return changed; |
152 | } | |
153 | EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); | |
154 | ||
1673f1f0 CH |
155 | static void nvme_free_ns(struct kref *kref) |
156 | { | |
157 | struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); | |
158 | ||
b0b4e09c MB |
159 | if (ns->ndev) |
160 | nvme_nvm_unregister(ns); | |
1673f1f0 | 161 | |
b0b4e09c MB |
162 | if (ns->disk) { |
163 | spin_lock(&dev_list_lock); | |
164 | ns->disk->private_data = NULL; | |
165 | spin_unlock(&dev_list_lock); | |
166 | } | |
1673f1f0 | 167 | |
1673f1f0 | 168 | put_disk(ns->disk); |
075790eb KB |
169 | ida_simple_remove(&ns->ctrl->ns_ida, ns->instance); |
170 | nvme_put_ctrl(ns->ctrl); | |
1673f1f0 CH |
171 | kfree(ns); |
172 | } | |
173 | ||
5bae7f73 | 174 | static void nvme_put_ns(struct nvme_ns *ns) |
1673f1f0 CH |
175 | { |
176 | kref_put(&ns->kref, nvme_free_ns); | |
177 | } | |
178 | ||
179 | static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk) | |
180 | { | |
181 | struct nvme_ns *ns; | |
182 | ||
183 | spin_lock(&dev_list_lock); | |
184 | ns = disk->private_data; | |
e439bb12 SG |
185 | if (ns) { |
186 | if (!kref_get_unless_zero(&ns->kref)) | |
187 | goto fail; | |
188 | if (!try_module_get(ns->ctrl->ops->module)) | |
189 | goto fail_put_ns; | |
190 | } | |
1673f1f0 CH |
191 | spin_unlock(&dev_list_lock); |
192 | ||
193 | return ns; | |
e439bb12 SG |
194 | |
195 | fail_put_ns: | |
196 | kref_put(&ns->kref, nvme_free_ns); | |
197 | fail: | |
198 | spin_unlock(&dev_list_lock); | |
199 | return NULL; | |
1673f1f0 CH |
200 | } |
201 | ||
7688faa6 CH |
202 | void nvme_requeue_req(struct request *req) |
203 | { | |
a6eaa884 | 204 | blk_mq_requeue_request(req, !blk_mq_queue_stopped(req->q)); |
7688faa6 | 205 | } |
576d55d6 | 206 | EXPORT_SYMBOL_GPL(nvme_requeue_req); |
7688faa6 | 207 | |
4160982e | 208 | struct request *nvme_alloc_request(struct request_queue *q, |
eb71f435 | 209 | struct nvme_command *cmd, unsigned int flags, int qid) |
21d34711 | 210 | { |
21d34711 | 211 | struct request *req; |
21d34711 | 212 | |
eb71f435 CH |
213 | if (qid == NVME_QID_ANY) { |
214 | req = blk_mq_alloc_request(q, nvme_is_write(cmd), flags); | |
215 | } else { | |
216 | req = blk_mq_alloc_request_hctx(q, nvme_is_write(cmd), flags, | |
217 | qid ? qid - 1 : 0); | |
218 | } | |
21d34711 | 219 | if (IS_ERR(req)) |
4160982e | 220 | return req; |
21d34711 CH |
221 | |
222 | req->cmd_type = REQ_TYPE_DRV_PRIV; | |
223 | req->cmd_flags |= REQ_FAILFAST_DRIVER; | |
d49187e9 | 224 | nvme_req(req)->cmd = cmd; |
21d34711 | 225 | |
4160982e CH |
226 | return req; |
227 | } | |
576d55d6 | 228 | EXPORT_SYMBOL_GPL(nvme_alloc_request); |
4160982e | 229 | |
8093f7ca ML |
230 | static inline void nvme_setup_flush(struct nvme_ns *ns, |
231 | struct nvme_command *cmnd) | |
232 | { | |
233 | memset(cmnd, 0, sizeof(*cmnd)); | |
234 | cmnd->common.opcode = nvme_cmd_flush; | |
235 | cmnd->common.nsid = cpu_to_le32(ns->ns_id); | |
236 | } | |
237 | ||
238 | static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, | |
239 | struct nvme_command *cmnd) | |
240 | { | |
241 | struct nvme_dsm_range *range; | |
242 | struct page *page; | |
243 | int offset; | |
244 | unsigned int nr_bytes = blk_rq_bytes(req); | |
245 | ||
246 | range = kmalloc(sizeof(*range), GFP_ATOMIC); | |
247 | if (!range) | |
248 | return BLK_MQ_RQ_QUEUE_BUSY; | |
249 | ||
250 | range->cattr = cpu_to_le32(0); | |
251 | range->nlb = cpu_to_le32(nr_bytes >> ns->lba_shift); | |
252 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
253 | ||
254 | memset(cmnd, 0, sizeof(*cmnd)); | |
255 | cmnd->dsm.opcode = nvme_cmd_dsm; | |
256 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); | |
257 | cmnd->dsm.nr = 0; | |
258 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); | |
259 | ||
260 | req->completion_data = range; | |
261 | page = virt_to_page(range); | |
262 | offset = offset_in_page(range); | |
263 | blk_add_request_payload(req, page, offset, sizeof(*range)); | |
264 | ||
265 | /* | |
266 | * we set __data_len back to the size of the area to be discarded | |
267 | * on disk. This allows us to report completion on the full amount | |
268 | * of blocks described by the request. | |
269 | */ | |
270 | req->__data_len = nr_bytes; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, | |
276 | struct nvme_command *cmnd) | |
277 | { | |
278 | u16 control = 0; | |
279 | u32 dsmgmt = 0; | |
280 | ||
281 | if (req->cmd_flags & REQ_FUA) | |
282 | control |= NVME_RW_FUA; | |
283 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) | |
284 | control |= NVME_RW_LR; | |
285 | ||
286 | if (req->cmd_flags & REQ_RAHEAD) | |
287 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; | |
288 | ||
289 | memset(cmnd, 0, sizeof(*cmnd)); | |
290 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); | |
291 | cmnd->rw.command_id = req->tag; | |
292 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); | |
293 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
294 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); | |
295 | ||
296 | if (ns->ms) { | |
297 | switch (ns->pi_type) { | |
298 | case NVME_NS_DPS_PI_TYPE3: | |
299 | control |= NVME_RW_PRINFO_PRCHK_GUARD; | |
300 | break; | |
301 | case NVME_NS_DPS_PI_TYPE1: | |
302 | case NVME_NS_DPS_PI_TYPE2: | |
303 | control |= NVME_RW_PRINFO_PRCHK_GUARD | | |
304 | NVME_RW_PRINFO_PRCHK_REF; | |
305 | cmnd->rw.reftag = cpu_to_le32( | |
306 | nvme_block_nr(ns, blk_rq_pos(req))); | |
307 | break; | |
308 | } | |
309 | if (!blk_integrity_rq(req)) | |
310 | control |= NVME_RW_PRINFO_PRACT; | |
311 | } | |
312 | ||
313 | cmnd->rw.control = cpu_to_le16(control); | |
314 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); | |
315 | } | |
316 | ||
317 | int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, | |
318 | struct nvme_command *cmd) | |
319 | { | |
320 | int ret = 0; | |
321 | ||
322 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) | |
d49187e9 | 323 | memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); |
3a5e02ce | 324 | else if (req_op(req) == REQ_OP_FLUSH) |
8093f7ca | 325 | nvme_setup_flush(ns, cmd); |
c2df40df | 326 | else if (req_op(req) == REQ_OP_DISCARD) |
8093f7ca ML |
327 | ret = nvme_setup_discard(ns, req, cmd); |
328 | else | |
329 | nvme_setup_rw(ns, req, cmd); | |
330 | ||
331 | return ret; | |
332 | } | |
333 | EXPORT_SYMBOL_GPL(nvme_setup_cmd); | |
334 | ||
4160982e CH |
335 | /* |
336 | * Returns 0 on success. If the result is negative, it's a Linux error code; | |
337 | * if the result is positive, it's an NVM Express status code | |
338 | */ | |
339 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
d49187e9 | 340 | union nvme_result *result, void *buffer, unsigned bufflen, |
eb71f435 | 341 | unsigned timeout, int qid, int at_head, int flags) |
4160982e CH |
342 | { |
343 | struct request *req; | |
344 | int ret; | |
345 | ||
eb71f435 | 346 | req = nvme_alloc_request(q, cmd, flags, qid); |
4160982e CH |
347 | if (IS_ERR(req)) |
348 | return PTR_ERR(req); | |
349 | ||
350 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
351 | ||
21d34711 CH |
352 | if (buffer && bufflen) { |
353 | ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); | |
354 | if (ret) | |
355 | goto out; | |
4160982e CH |
356 | } |
357 | ||
eb71f435 | 358 | blk_execute_rq(req->q, NULL, req, at_head); |
d49187e9 CH |
359 | if (result) |
360 | *result = nvme_req(req)->result; | |
4160982e CH |
361 | ret = req->errors; |
362 | out: | |
363 | blk_mq_free_request(req); | |
364 | return ret; | |
365 | } | |
eb71f435 | 366 | EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); |
4160982e CH |
367 | |
368 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
369 | void *buffer, unsigned bufflen) | |
370 | { | |
eb71f435 CH |
371 | return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, |
372 | NVME_QID_ANY, 0, 0); | |
4160982e | 373 | } |
576d55d6 | 374 | EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
4160982e | 375 | |
0b7f1f26 KB |
376 | int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
377 | void __user *ubuffer, unsigned bufflen, | |
378 | void __user *meta_buffer, unsigned meta_len, u32 meta_seed, | |
379 | u32 *result, unsigned timeout) | |
4160982e | 380 | { |
7a5abb4b | 381 | bool write = nvme_is_write(cmd); |
0b7f1f26 KB |
382 | struct nvme_ns *ns = q->queuedata; |
383 | struct gendisk *disk = ns ? ns->disk : NULL; | |
4160982e | 384 | struct request *req; |
0b7f1f26 KB |
385 | struct bio *bio = NULL; |
386 | void *meta = NULL; | |
4160982e CH |
387 | int ret; |
388 | ||
eb71f435 | 389 | req = nvme_alloc_request(q, cmd, 0, NVME_QID_ANY); |
4160982e CH |
390 | if (IS_ERR(req)) |
391 | return PTR_ERR(req); | |
392 | ||
393 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
394 | ||
395 | if (ubuffer && bufflen) { | |
21d34711 CH |
396 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
397 | GFP_KERNEL); | |
398 | if (ret) | |
399 | goto out; | |
400 | bio = req->bio; | |
21d34711 | 401 | |
0b7f1f26 KB |
402 | if (!disk) |
403 | goto submit; | |
404 | bio->bi_bdev = bdget_disk(disk, 0); | |
405 | if (!bio->bi_bdev) { | |
406 | ret = -ENODEV; | |
407 | goto out_unmap; | |
408 | } | |
409 | ||
e9fc63d6 | 410 | if (meta_buffer && meta_len) { |
0b7f1f26 KB |
411 | struct bio_integrity_payload *bip; |
412 | ||
413 | meta = kmalloc(meta_len, GFP_KERNEL); | |
414 | if (!meta) { | |
415 | ret = -ENOMEM; | |
416 | goto out_unmap; | |
417 | } | |
418 | ||
419 | if (write) { | |
420 | if (copy_from_user(meta, meta_buffer, | |
421 | meta_len)) { | |
422 | ret = -EFAULT; | |
423 | goto out_free_meta; | |
424 | } | |
425 | } | |
426 | ||
427 | bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); | |
06c1e390 KB |
428 | if (IS_ERR(bip)) { |
429 | ret = PTR_ERR(bip); | |
0b7f1f26 KB |
430 | goto out_free_meta; |
431 | } | |
432 | ||
433 | bip->bip_iter.bi_size = meta_len; | |
434 | bip->bip_iter.bi_sector = meta_seed; | |
435 | ||
436 | ret = bio_integrity_add_page(bio, virt_to_page(meta), | |
437 | meta_len, offset_in_page(meta)); | |
438 | if (ret != meta_len) { | |
439 | ret = -ENOMEM; | |
440 | goto out_free_meta; | |
441 | } | |
442 | } | |
443 | } | |
444 | submit: | |
445 | blk_execute_rq(req->q, disk, req, 0); | |
446 | ret = req->errors; | |
21d34711 | 447 | if (result) |
d49187e9 | 448 | *result = le32_to_cpu(nvme_req(req)->result.u32); |
0b7f1f26 KB |
449 | if (meta && !ret && !write) { |
450 | if (copy_to_user(meta_buffer, meta, meta_len)) | |
451 | ret = -EFAULT; | |
452 | } | |
453 | out_free_meta: | |
454 | kfree(meta); | |
455 | out_unmap: | |
456 | if (bio) { | |
457 | if (disk && bio->bi_bdev) | |
458 | bdput(bio->bi_bdev); | |
459 | blk_rq_unmap_user(bio); | |
460 | } | |
21d34711 CH |
461 | out: |
462 | blk_mq_free_request(req); | |
463 | return ret; | |
464 | } | |
465 | ||
0b7f1f26 KB |
466 | int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
467 | void __user *ubuffer, unsigned bufflen, u32 *result, | |
468 | unsigned timeout) | |
469 | { | |
470 | return __nvme_submit_user_cmd(q, cmd, ubuffer, bufflen, NULL, 0, 0, | |
471 | result, timeout); | |
472 | } | |
473 | ||
038bd4cb SG |
474 | static void nvme_keep_alive_end_io(struct request *rq, int error) |
475 | { | |
476 | struct nvme_ctrl *ctrl = rq->end_io_data; | |
477 | ||
478 | blk_mq_free_request(rq); | |
479 | ||
480 | if (error) { | |
481 | dev_err(ctrl->device, | |
482 | "failed nvme_keep_alive_end_io error=%d\n", error); | |
483 | return; | |
484 | } | |
485 | ||
486 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); | |
487 | } | |
488 | ||
489 | static int nvme_keep_alive(struct nvme_ctrl *ctrl) | |
490 | { | |
491 | struct nvme_command c; | |
492 | struct request *rq; | |
493 | ||
494 | memset(&c, 0, sizeof(c)); | |
495 | c.common.opcode = nvme_admin_keep_alive; | |
496 | ||
497 | rq = nvme_alloc_request(ctrl->admin_q, &c, BLK_MQ_REQ_RESERVED, | |
498 | NVME_QID_ANY); | |
499 | if (IS_ERR(rq)) | |
500 | return PTR_ERR(rq); | |
501 | ||
502 | rq->timeout = ctrl->kato * HZ; | |
503 | rq->end_io_data = ctrl; | |
504 | ||
505 | blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | static void nvme_keep_alive_work(struct work_struct *work) | |
511 | { | |
512 | struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), | |
513 | struct nvme_ctrl, ka_work); | |
514 | ||
515 | if (nvme_keep_alive(ctrl)) { | |
516 | /* allocation failure, reset the controller */ | |
517 | dev_err(ctrl->device, "keep-alive failed\n"); | |
518 | ctrl->ops->reset_ctrl(ctrl); | |
519 | return; | |
520 | } | |
521 | } | |
522 | ||
523 | void nvme_start_keep_alive(struct nvme_ctrl *ctrl) | |
524 | { | |
525 | if (unlikely(ctrl->kato == 0)) | |
526 | return; | |
527 | ||
528 | INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); | |
529 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); | |
530 | } | |
531 | EXPORT_SYMBOL_GPL(nvme_start_keep_alive); | |
532 | ||
533 | void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) | |
534 | { | |
535 | if (unlikely(ctrl->kato == 0)) | |
536 | return; | |
537 | ||
538 | cancel_delayed_work_sync(&ctrl->ka_work); | |
539 | } | |
540 | EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); | |
541 | ||
1c63dc66 | 542 | int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
21d34711 CH |
543 | { |
544 | struct nvme_command c = { }; | |
545 | int error; | |
546 | ||
547 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
548 | c.identify.opcode = nvme_admin_identify; | |
549 | c.identify.cns = cpu_to_le32(1); | |
550 | ||
551 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); | |
552 | if (!*id) | |
553 | return -ENOMEM; | |
554 | ||
555 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
556 | sizeof(struct nvme_id_ctrl)); | |
557 | if (error) | |
558 | kfree(*id); | |
559 | return error; | |
560 | } | |
561 | ||
540c801c KB |
562 | static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list) |
563 | { | |
564 | struct nvme_command c = { }; | |
565 | ||
566 | c.identify.opcode = nvme_admin_identify; | |
567 | c.identify.cns = cpu_to_le32(2); | |
568 | c.identify.nsid = cpu_to_le32(nsid); | |
569 | return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, 0x1000); | |
570 | } | |
571 | ||
1c63dc66 | 572 | int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, |
21d34711 CH |
573 | struct nvme_id_ns **id) |
574 | { | |
575 | struct nvme_command c = { }; | |
576 | int error; | |
577 | ||
578 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
579 | c.identify.opcode = nvme_admin_identify, | |
580 | c.identify.nsid = cpu_to_le32(nsid), | |
581 | ||
582 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); | |
583 | if (!*id) | |
584 | return -ENOMEM; | |
585 | ||
586 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
587 | sizeof(struct nvme_id_ns)); | |
588 | if (error) | |
589 | kfree(*id); | |
590 | return error; | |
591 | } | |
592 | ||
1c63dc66 | 593 | int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, |
1a6fe74d | 594 | void *buffer, size_t buflen, u32 *result) |
21d34711 CH |
595 | { |
596 | struct nvme_command c; | |
d49187e9 | 597 | union nvme_result res; |
1cb3cce5 | 598 | int ret; |
21d34711 CH |
599 | |
600 | memset(&c, 0, sizeof(c)); | |
601 | c.features.opcode = nvme_admin_get_features; | |
602 | c.features.nsid = cpu_to_le32(nsid); | |
21d34711 CH |
603 | c.features.fid = cpu_to_le32(fid); |
604 | ||
d49187e9 | 605 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, buffer, buflen, 0, |
eb71f435 | 606 | NVME_QID_ANY, 0, 0); |
9b47f77a | 607 | if (ret >= 0 && result) |
d49187e9 | 608 | *result = le32_to_cpu(res.u32); |
1cb3cce5 | 609 | return ret; |
21d34711 CH |
610 | } |
611 | ||
1c63dc66 | 612 | int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, |
1a6fe74d | 613 | void *buffer, size_t buflen, u32 *result) |
21d34711 CH |
614 | { |
615 | struct nvme_command c; | |
d49187e9 | 616 | union nvme_result res; |
1cb3cce5 | 617 | int ret; |
21d34711 CH |
618 | |
619 | memset(&c, 0, sizeof(c)); | |
620 | c.features.opcode = nvme_admin_set_features; | |
21d34711 CH |
621 | c.features.fid = cpu_to_le32(fid); |
622 | c.features.dword11 = cpu_to_le32(dword11); | |
623 | ||
d49187e9 | 624 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, |
1a6fe74d | 625 | buffer, buflen, 0, NVME_QID_ANY, 0, 0); |
9b47f77a | 626 | if (ret >= 0 && result) |
d49187e9 | 627 | *result = le32_to_cpu(res.u32); |
1cb3cce5 | 628 | return ret; |
21d34711 CH |
629 | } |
630 | ||
1c63dc66 | 631 | int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log) |
21d34711 CH |
632 | { |
633 | struct nvme_command c = { }; | |
634 | int error; | |
635 | ||
636 | c.common.opcode = nvme_admin_get_log_page, | |
637 | c.common.nsid = cpu_to_le32(0xFFFFFFFF), | |
638 | c.common.cdw10[0] = cpu_to_le32( | |
639 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | | |
640 | NVME_LOG_SMART), | |
641 | ||
642 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); | |
643 | if (!*log) | |
644 | return -ENOMEM; | |
645 | ||
646 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, | |
647 | sizeof(struct nvme_smart_log)); | |
648 | if (error) | |
649 | kfree(*log); | |
650 | return error; | |
651 | } | |
1673f1f0 | 652 | |
9a0be7ab CH |
653 | int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
654 | { | |
655 | u32 q_count = (*count - 1) | ((*count - 1) << 16); | |
656 | u32 result; | |
657 | int status, nr_io_queues; | |
658 | ||
1a6fe74d | 659 | status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, |
9a0be7ab | 660 | &result); |
f5fa90dc | 661 | if (status < 0) |
9a0be7ab CH |
662 | return status; |
663 | ||
f5fa90dc CH |
664 | /* |
665 | * Degraded controllers might return an error when setting the queue | |
666 | * count. We still want to be able to bring them online and offer | |
667 | * access to the admin queue, as that might be only way to fix them up. | |
668 | */ | |
669 | if (status > 0) { | |
670 | dev_err(ctrl->dev, "Could not set queue count (%d)\n", status); | |
671 | *count = 0; | |
672 | } else { | |
673 | nr_io_queues = min(result & 0xffff, result >> 16) + 1; | |
674 | *count = min(*count, nr_io_queues); | |
675 | } | |
676 | ||
9a0be7ab CH |
677 | return 0; |
678 | } | |
576d55d6 | 679 | EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
9a0be7ab | 680 | |
1673f1f0 CH |
681 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
682 | { | |
683 | struct nvme_user_io io; | |
684 | struct nvme_command c; | |
685 | unsigned length, meta_len; | |
686 | void __user *metadata; | |
687 | ||
688 | if (copy_from_user(&io, uio, sizeof(io))) | |
689 | return -EFAULT; | |
63088ec7 KB |
690 | if (io.flags) |
691 | return -EINVAL; | |
1673f1f0 CH |
692 | |
693 | switch (io.opcode) { | |
694 | case nvme_cmd_write: | |
695 | case nvme_cmd_read: | |
696 | case nvme_cmd_compare: | |
697 | break; | |
698 | default: | |
699 | return -EINVAL; | |
700 | } | |
701 | ||
702 | length = (io.nblocks + 1) << ns->lba_shift; | |
703 | meta_len = (io.nblocks + 1) * ns->ms; | |
704 | metadata = (void __user *)(uintptr_t)io.metadata; | |
705 | ||
706 | if (ns->ext) { | |
707 | length += meta_len; | |
708 | meta_len = 0; | |
709 | } else if (meta_len) { | |
710 | if ((io.metadata & 3) || !io.metadata) | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
714 | memset(&c, 0, sizeof(c)); | |
715 | c.rw.opcode = io.opcode; | |
716 | c.rw.flags = io.flags; | |
717 | c.rw.nsid = cpu_to_le32(ns->ns_id); | |
718 | c.rw.slba = cpu_to_le64(io.slba); | |
719 | c.rw.length = cpu_to_le16(io.nblocks); | |
720 | c.rw.control = cpu_to_le16(io.control); | |
721 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); | |
722 | c.rw.reftag = cpu_to_le32(io.reftag); | |
723 | c.rw.apptag = cpu_to_le16(io.apptag); | |
724 | c.rw.appmask = cpu_to_le16(io.appmask); | |
725 | ||
726 | return __nvme_submit_user_cmd(ns->queue, &c, | |
727 | (void __user *)(uintptr_t)io.addr, length, | |
728 | metadata, meta_len, io.slba, NULL, 0); | |
729 | } | |
730 | ||
f3ca80fc | 731 | static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
1673f1f0 CH |
732 | struct nvme_passthru_cmd __user *ucmd) |
733 | { | |
734 | struct nvme_passthru_cmd cmd; | |
735 | struct nvme_command c; | |
736 | unsigned timeout = 0; | |
737 | int status; | |
738 | ||
739 | if (!capable(CAP_SYS_ADMIN)) | |
740 | return -EACCES; | |
741 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) | |
742 | return -EFAULT; | |
63088ec7 KB |
743 | if (cmd.flags) |
744 | return -EINVAL; | |
1673f1f0 CH |
745 | |
746 | memset(&c, 0, sizeof(c)); | |
747 | c.common.opcode = cmd.opcode; | |
748 | c.common.flags = cmd.flags; | |
749 | c.common.nsid = cpu_to_le32(cmd.nsid); | |
750 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); | |
751 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); | |
752 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); | |
753 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); | |
754 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); | |
755 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); | |
756 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); | |
757 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); | |
758 | ||
759 | if (cmd.timeout_ms) | |
760 | timeout = msecs_to_jiffies(cmd.timeout_ms); | |
761 | ||
762 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, | |
d1ea7be5 | 763 | (void __user *)(uintptr_t)cmd.addr, cmd.data_len, |
1673f1f0 CH |
764 | &cmd.result, timeout); |
765 | if (status >= 0) { | |
766 | if (put_user(cmd.result, &ucmd->result)) | |
767 | return -EFAULT; | |
768 | } | |
769 | ||
770 | return status; | |
771 | } | |
772 | ||
773 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, | |
774 | unsigned int cmd, unsigned long arg) | |
775 | { | |
776 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
777 | ||
778 | switch (cmd) { | |
779 | case NVME_IOCTL_ID: | |
780 | force_successful_syscall_return(); | |
781 | return ns->ns_id; | |
782 | case NVME_IOCTL_ADMIN_CMD: | |
783 | return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg); | |
784 | case NVME_IOCTL_IO_CMD: | |
785 | return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); | |
786 | case NVME_IOCTL_SUBMIT_IO: | |
787 | return nvme_submit_io(ns, (void __user *)arg); | |
44907332 | 788 | #ifdef CONFIG_BLK_DEV_NVME_SCSI |
1673f1f0 CH |
789 | case SG_GET_VERSION_NUM: |
790 | return nvme_sg_get_version_num((void __user *)arg); | |
791 | case SG_IO: | |
792 | return nvme_sg_io(ns, (void __user *)arg); | |
44907332 | 793 | #endif |
1673f1f0 CH |
794 | default: |
795 | return -ENOTTY; | |
796 | } | |
797 | } | |
798 | ||
799 | #ifdef CONFIG_COMPAT | |
800 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
801 | unsigned int cmd, unsigned long arg) | |
802 | { | |
803 | switch (cmd) { | |
804 | case SG_IO: | |
805 | return -ENOIOCTLCMD; | |
806 | } | |
807 | return nvme_ioctl(bdev, mode, cmd, arg); | |
808 | } | |
809 | #else | |
810 | #define nvme_compat_ioctl NULL | |
811 | #endif | |
812 | ||
813 | static int nvme_open(struct block_device *bdev, fmode_t mode) | |
814 | { | |
815 | return nvme_get_ns_from_disk(bdev->bd_disk) ? 0 : -ENXIO; | |
816 | } | |
817 | ||
818 | static void nvme_release(struct gendisk *disk, fmode_t mode) | |
819 | { | |
e439bb12 SG |
820 | struct nvme_ns *ns = disk->private_data; |
821 | ||
822 | module_put(ns->ctrl->ops->module); | |
823 | nvme_put_ns(ns); | |
1673f1f0 CH |
824 | } |
825 | ||
826 | static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
827 | { | |
828 | /* some standard values */ | |
829 | geo->heads = 1 << 6; | |
830 | geo->sectors = 1 << 5; | |
831 | geo->cylinders = get_capacity(bdev->bd_disk) >> 11; | |
832 | return 0; | |
833 | } | |
834 | ||
835 | #ifdef CONFIG_BLK_DEV_INTEGRITY | |
836 | static void nvme_init_integrity(struct nvme_ns *ns) | |
837 | { | |
838 | struct blk_integrity integrity; | |
839 | ||
fa9a89fc | 840 | memset(&integrity, 0, sizeof(integrity)); |
1673f1f0 CH |
841 | switch (ns->pi_type) { |
842 | case NVME_NS_DPS_PI_TYPE3: | |
843 | integrity.profile = &t10_pi_type3_crc; | |
ba36c21b NB |
844 | integrity.tag_size = sizeof(u16) + sizeof(u32); |
845 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; | |
1673f1f0 CH |
846 | break; |
847 | case NVME_NS_DPS_PI_TYPE1: | |
848 | case NVME_NS_DPS_PI_TYPE2: | |
849 | integrity.profile = &t10_pi_type1_crc; | |
ba36c21b NB |
850 | integrity.tag_size = sizeof(u16); |
851 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; | |
1673f1f0 CH |
852 | break; |
853 | default: | |
854 | integrity.profile = NULL; | |
855 | break; | |
856 | } | |
857 | integrity.tuple_size = ns->ms; | |
858 | blk_integrity_register(ns->disk, &integrity); | |
859 | blk_queue_max_integrity_segments(ns->queue, 1); | |
860 | } | |
861 | #else | |
862 | static void nvme_init_integrity(struct nvme_ns *ns) | |
863 | { | |
864 | } | |
865 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
866 | ||
867 | static void nvme_config_discard(struct nvme_ns *ns) | |
868 | { | |
08095e70 | 869 | struct nvme_ctrl *ctrl = ns->ctrl; |
1673f1f0 | 870 | u32 logical_block_size = queue_logical_block_size(ns->queue); |
08095e70 KB |
871 | |
872 | if (ctrl->quirks & NVME_QUIRK_DISCARD_ZEROES) | |
873 | ns->queue->limits.discard_zeroes_data = 1; | |
874 | else | |
875 | ns->queue->limits.discard_zeroes_data = 0; | |
876 | ||
1673f1f0 CH |
877 | ns->queue->limits.discard_alignment = logical_block_size; |
878 | ns->queue->limits.discard_granularity = logical_block_size; | |
bd0fc288 | 879 | blk_queue_max_discard_sectors(ns->queue, UINT_MAX); |
1673f1f0 CH |
880 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); |
881 | } | |
882 | ||
ac81bfa9 | 883 | static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id) |
1673f1f0 | 884 | { |
ac81bfa9 | 885 | if (nvme_identify_ns(ns->ctrl, ns->ns_id, id)) { |
b0b4e09c | 886 | dev_warn(ns->ctrl->dev, "%s: Identify failure\n", __func__); |
1673f1f0 CH |
887 | return -ENODEV; |
888 | } | |
1673f1f0 | 889 | |
ac81bfa9 MB |
890 | if ((*id)->ncap == 0) { |
891 | kfree(*id); | |
892 | return -ENODEV; | |
1673f1f0 CH |
893 | } |
894 | ||
2b9b6e86 | 895 | if (ns->ctrl->vs >= NVME_VS(1, 1)) |
ac81bfa9 | 896 | memcpy(ns->eui, (*id)->eui64, sizeof(ns->eui)); |
2b9b6e86 | 897 | if (ns->ctrl->vs >= NVME_VS(1, 2)) |
ac81bfa9 MB |
898 | memcpy(ns->uuid, (*id)->nguid, sizeof(ns->uuid)); |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) | |
904 | { | |
905 | struct nvme_ns *ns = disk->private_data; | |
906 | u8 lbaf, pi_type; | |
907 | u16 old_ms; | |
908 | unsigned short bs; | |
2b9b6e86 | 909 | |
1673f1f0 CH |
910 | old_ms = ns->ms; |
911 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; | |
912 | ns->lba_shift = id->lbaf[lbaf].ds; | |
913 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); | |
914 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); | |
915 | ||
916 | /* | |
917 | * If identify namespace failed, use default 512 byte block size so | |
918 | * block layer can use before failing read/write for 0 capacity. | |
919 | */ | |
920 | if (ns->lba_shift == 0) | |
921 | ns->lba_shift = 9; | |
922 | bs = 1 << ns->lba_shift; | |
1673f1f0 CH |
923 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ |
924 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? | |
925 | id->dps & NVME_NS_DPS_PI_MASK : 0; | |
926 | ||
927 | blk_mq_freeze_queue(disk->queue); | |
928 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || | |
929 | ns->ms != old_ms || | |
930 | bs != queue_logical_block_size(disk->queue) || | |
931 | (ns->ms && ns->ext))) | |
932 | blk_integrity_unregister(disk); | |
933 | ||
934 | ns->pi_type = pi_type; | |
935 | blk_queue_logical_block_size(ns->queue, bs); | |
936 | ||
4b9d5b15 | 937 | if (ns->ms && !blk_get_integrity(disk) && !ns->ext) |
1673f1f0 | 938 | nvme_init_integrity(ns); |
1673f1f0 CH |
939 | if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk)) |
940 | set_capacity(disk, 0); | |
941 | else | |
942 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); | |
943 | ||
944 | if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) | |
945 | nvme_config_discard(ns); | |
946 | blk_mq_unfreeze_queue(disk->queue); | |
ac81bfa9 | 947 | } |
1673f1f0 | 948 | |
ac81bfa9 MB |
949 | static int nvme_revalidate_disk(struct gendisk *disk) |
950 | { | |
951 | struct nvme_ns *ns = disk->private_data; | |
952 | struct nvme_id_ns *id = NULL; | |
953 | int ret; | |
954 | ||
955 | if (test_bit(NVME_NS_DEAD, &ns->flags)) { | |
956 | set_capacity(disk, 0); | |
957 | return -ENODEV; | |
958 | } | |
959 | ||
960 | ret = nvme_revalidate_ns(ns, &id); | |
961 | if (ret) | |
962 | return ret; | |
963 | ||
964 | __nvme_revalidate_disk(disk, id); | |
1673f1f0 | 965 | kfree(id); |
ac81bfa9 | 966 | |
1673f1f0 CH |
967 | return 0; |
968 | } | |
969 | ||
970 | static char nvme_pr_type(enum pr_type type) | |
971 | { | |
972 | switch (type) { | |
973 | case PR_WRITE_EXCLUSIVE: | |
974 | return 1; | |
975 | case PR_EXCLUSIVE_ACCESS: | |
976 | return 2; | |
977 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
978 | return 3; | |
979 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
980 | return 4; | |
981 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
982 | return 5; | |
983 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
984 | return 6; | |
985 | default: | |
986 | return 0; | |
987 | } | |
988 | }; | |
989 | ||
990 | static int nvme_pr_command(struct block_device *bdev, u32 cdw10, | |
991 | u64 key, u64 sa_key, u8 op) | |
992 | { | |
993 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
994 | struct nvme_command c; | |
995 | u8 data[16] = { 0, }; | |
996 | ||
997 | put_unaligned_le64(key, &data[0]); | |
998 | put_unaligned_le64(sa_key, &data[8]); | |
999 | ||
1000 | memset(&c, 0, sizeof(c)); | |
1001 | c.common.opcode = op; | |
1002 | c.common.nsid = cpu_to_le32(ns->ns_id); | |
1003 | c.common.cdw10[0] = cpu_to_le32(cdw10); | |
1004 | ||
1005 | return nvme_submit_sync_cmd(ns->queue, &c, data, 16); | |
1006 | } | |
1007 | ||
1008 | static int nvme_pr_register(struct block_device *bdev, u64 old, | |
1009 | u64 new, unsigned flags) | |
1010 | { | |
1011 | u32 cdw10; | |
1012 | ||
1013 | if (flags & ~PR_FL_IGNORE_KEY) | |
1014 | return -EOPNOTSUPP; | |
1015 | ||
1016 | cdw10 = old ? 2 : 0; | |
1017 | cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; | |
1018 | cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ | |
1019 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); | |
1020 | } | |
1021 | ||
1022 | static int nvme_pr_reserve(struct block_device *bdev, u64 key, | |
1023 | enum pr_type type, unsigned flags) | |
1024 | { | |
1025 | u32 cdw10; | |
1026 | ||
1027 | if (flags & ~PR_FL_IGNORE_KEY) | |
1028 | return -EOPNOTSUPP; | |
1029 | ||
1030 | cdw10 = nvme_pr_type(type) << 8; | |
1031 | cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); | |
1032 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); | |
1033 | } | |
1034 | ||
1035 | static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, | |
1036 | enum pr_type type, bool abort) | |
1037 | { | |
1038 | u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; | |
1039 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); | |
1040 | } | |
1041 | ||
1042 | static int nvme_pr_clear(struct block_device *bdev, u64 key) | |
1043 | { | |
8c0b3915 | 1044 | u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
1673f1f0 CH |
1045 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
1046 | } | |
1047 | ||
1048 | static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1049 | { | |
1050 | u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; | |
1051 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); | |
1052 | } | |
1053 | ||
1054 | static const struct pr_ops nvme_pr_ops = { | |
1055 | .pr_register = nvme_pr_register, | |
1056 | .pr_reserve = nvme_pr_reserve, | |
1057 | .pr_release = nvme_pr_release, | |
1058 | .pr_preempt = nvme_pr_preempt, | |
1059 | .pr_clear = nvme_pr_clear, | |
1060 | }; | |
1061 | ||
5bae7f73 | 1062 | static const struct block_device_operations nvme_fops = { |
1673f1f0 CH |
1063 | .owner = THIS_MODULE, |
1064 | .ioctl = nvme_ioctl, | |
1065 | .compat_ioctl = nvme_compat_ioctl, | |
1066 | .open = nvme_open, | |
1067 | .release = nvme_release, | |
1068 | .getgeo = nvme_getgeo, | |
1069 | .revalidate_disk= nvme_revalidate_disk, | |
1070 | .pr_ops = &nvme_pr_ops, | |
1071 | }; | |
1072 | ||
5fd4ce1b CH |
1073 | static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
1074 | { | |
1075 | unsigned long timeout = | |
1076 | ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; | |
1077 | u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; | |
1078 | int ret; | |
1079 | ||
1080 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
1081 | if ((csts & NVME_CSTS_RDY) == bit) | |
1082 | break; | |
1083 | ||
1084 | msleep(100); | |
1085 | if (fatal_signal_pending(current)) | |
1086 | return -EINTR; | |
1087 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 1088 | dev_err(ctrl->device, |
5fd4ce1b CH |
1089 | "Device not ready; aborting %s\n", enabled ? |
1090 | "initialisation" : "reset"); | |
1091 | return -ENODEV; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * If the device has been passed off to us in an enabled state, just clear | |
1100 | * the enabled bit. The spec says we should set the 'shutdown notification | |
1101 | * bits', but doing so may cause the device to complete commands to the | |
1102 | * admin queue ... and we don't know what memory that might be pointing at! | |
1103 | */ | |
1104 | int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
1105 | { | |
1106 | int ret; | |
1107 | ||
1108 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
1109 | ctrl->ctrl_config &= ~NVME_CC_ENABLE; | |
1110 | ||
1111 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1112 | if (ret) | |
1113 | return ret; | |
54adc010 GP |
1114 | |
1115 | /* Checking for ctrl->tagset is a trick to avoid sleeping on module | |
1116 | * load, since we only need the quirk on reset_controller. Notice | |
1117 | * that the HGST device needs this delay only in firmware activation | |
1118 | * procedure; unfortunately we have no (easy) way to verify this. | |
1119 | */ | |
1120 | if ((ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) && ctrl->tagset) | |
1121 | msleep(NVME_QUIRK_DELAY_AMOUNT); | |
1122 | ||
5fd4ce1b CH |
1123 | return nvme_wait_ready(ctrl, cap, false); |
1124 | } | |
576d55d6 | 1125 | EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
5fd4ce1b CH |
1126 | |
1127 | int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
1128 | { | |
1129 | /* | |
1130 | * Default to a 4K page size, with the intention to update this | |
1131 | * path in the future to accomodate architectures with differing | |
1132 | * kernel and IO page sizes. | |
1133 | */ | |
1134 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12; | |
1135 | int ret; | |
1136 | ||
1137 | if (page_shift < dev_page_min) { | |
1b3c47c1 | 1138 | dev_err(ctrl->device, |
5fd4ce1b CH |
1139 | "Minimum device page size %u too large for host (%u)\n", |
1140 | 1 << dev_page_min, 1 << page_shift); | |
1141 | return -ENODEV; | |
1142 | } | |
1143 | ||
1144 | ctrl->page_size = 1 << page_shift; | |
1145 | ||
1146 | ctrl->ctrl_config = NVME_CC_CSS_NVM; | |
1147 | ctrl->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; | |
1148 | ctrl->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; | |
1149 | ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; | |
1150 | ctrl->ctrl_config |= NVME_CC_ENABLE; | |
1151 | ||
1152 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1153 | if (ret) | |
1154 | return ret; | |
1155 | return nvme_wait_ready(ctrl, cap, true); | |
1156 | } | |
576d55d6 | 1157 | EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
5fd4ce1b CH |
1158 | |
1159 | int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) | |
1160 | { | |
1161 | unsigned long timeout = SHUTDOWN_TIMEOUT + jiffies; | |
1162 | u32 csts; | |
1163 | int ret; | |
1164 | ||
1165 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
1166 | ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; | |
1167 | ||
1168 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1169 | if (ret) | |
1170 | return ret; | |
1171 | ||
1172 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
1173 | if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) | |
1174 | break; | |
1175 | ||
1176 | msleep(100); | |
1177 | if (fatal_signal_pending(current)) | |
1178 | return -EINTR; | |
1179 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 1180 | dev_err(ctrl->device, |
5fd4ce1b CH |
1181 | "Device shutdown incomplete; abort shutdown\n"); |
1182 | return -ENODEV; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | return ret; | |
1187 | } | |
576d55d6 | 1188 | EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
5fd4ce1b | 1189 | |
da35825d CH |
1190 | static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
1191 | struct request_queue *q) | |
1192 | { | |
7c88cb00 JA |
1193 | bool vwc = false; |
1194 | ||
da35825d | 1195 | if (ctrl->max_hw_sectors) { |
45686b61 CH |
1196 | u32 max_segments = |
1197 | (ctrl->max_hw_sectors / (ctrl->page_size >> 9)) + 1; | |
1198 | ||
da35825d | 1199 | blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
45686b61 | 1200 | blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
da35825d CH |
1201 | } |
1202 | if (ctrl->stripe_size) | |
1203 | blk_queue_chunk_sectors(q, ctrl->stripe_size >> 9); | |
da35825d | 1204 | blk_queue_virt_boundary(q, ctrl->page_size - 1); |
7c88cb00 JA |
1205 | if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) |
1206 | vwc = true; | |
1207 | blk_queue_write_cache(q, vwc, vwc); | |
da35825d CH |
1208 | } |
1209 | ||
7fd8930f CH |
1210 | /* |
1211 | * Initialize the cached copies of the Identify data and various controller | |
1212 | * register in our nvme_ctrl structure. This should be called as soon as | |
1213 | * the admin queue is fully up and running. | |
1214 | */ | |
1215 | int nvme_init_identify(struct nvme_ctrl *ctrl) | |
1216 | { | |
1217 | struct nvme_id_ctrl *id; | |
1218 | u64 cap; | |
1219 | int ret, page_shift; | |
a229dbf6 | 1220 | u32 max_hw_sectors; |
7fd8930f | 1221 | |
f3ca80fc CH |
1222 | ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
1223 | if (ret) { | |
1b3c47c1 | 1224 | dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
f3ca80fc CH |
1225 | return ret; |
1226 | } | |
1227 | ||
7fd8930f CH |
1228 | ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &cap); |
1229 | if (ret) { | |
1b3c47c1 | 1230 | dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
7fd8930f CH |
1231 | return ret; |
1232 | } | |
1233 | page_shift = NVME_CAP_MPSMIN(cap) + 12; | |
1234 | ||
f3ca80fc CH |
1235 | if (ctrl->vs >= NVME_VS(1, 1)) |
1236 | ctrl->subsystem = NVME_CAP_NSSRC(cap); | |
1237 | ||
7fd8930f CH |
1238 | ret = nvme_identify_ctrl(ctrl, &id); |
1239 | if (ret) { | |
1b3c47c1 | 1240 | dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
7fd8930f CH |
1241 | return -EIO; |
1242 | } | |
1243 | ||
118472ab | 1244 | ctrl->vid = le16_to_cpu(id->vid); |
7fd8930f | 1245 | ctrl->oncs = le16_to_cpup(&id->oncs); |
6bf25d16 | 1246 | atomic_set(&ctrl->abort_limit, id->acl + 1); |
7fd8930f | 1247 | ctrl->vwc = id->vwc; |
931e1c22 | 1248 | ctrl->cntlid = le16_to_cpup(&id->cntlid); |
7fd8930f CH |
1249 | memcpy(ctrl->serial, id->sn, sizeof(id->sn)); |
1250 | memcpy(ctrl->model, id->mn, sizeof(id->mn)); | |
1251 | memcpy(ctrl->firmware_rev, id->fr, sizeof(id->fr)); | |
1252 | if (id->mdts) | |
a229dbf6 | 1253 | max_hw_sectors = 1 << (id->mdts + page_shift - 9); |
7fd8930f | 1254 | else |
a229dbf6 CH |
1255 | max_hw_sectors = UINT_MAX; |
1256 | ctrl->max_hw_sectors = | |
1257 | min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); | |
7fd8930f CH |
1258 | |
1259 | if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && id->vs[3]) { | |
1260 | unsigned int max_hw_sectors; | |
1261 | ||
1262 | ctrl->stripe_size = 1 << (id->vs[3] + page_shift); | |
1263 | max_hw_sectors = ctrl->stripe_size >> (page_shift - 9); | |
1264 | if (ctrl->max_hw_sectors) { | |
1265 | ctrl->max_hw_sectors = min(max_hw_sectors, | |
1266 | ctrl->max_hw_sectors); | |
1267 | } else { | |
1268 | ctrl->max_hw_sectors = max_hw_sectors; | |
1269 | } | |
1270 | } | |
1271 | ||
da35825d | 1272 | nvme_set_queue_limits(ctrl, ctrl->admin_q); |
07bfcd09 | 1273 | ctrl->sgls = le32_to_cpu(id->sgls); |
038bd4cb | 1274 | ctrl->kas = le16_to_cpu(id->kas); |
07bfcd09 CH |
1275 | |
1276 | if (ctrl->ops->is_fabrics) { | |
1277 | ctrl->icdoff = le16_to_cpu(id->icdoff); | |
1278 | ctrl->ioccsz = le32_to_cpu(id->ioccsz); | |
1279 | ctrl->iorcsz = le32_to_cpu(id->iorcsz); | |
1280 | ctrl->maxcmd = le16_to_cpu(id->maxcmd); | |
1281 | ||
1282 | /* | |
1283 | * In fabrics we need to verify the cntlid matches the | |
1284 | * admin connect | |
1285 | */ | |
1286 | if (ctrl->cntlid != le16_to_cpu(id->cntlid)) | |
1287 | ret = -EINVAL; | |
038bd4cb SG |
1288 | |
1289 | if (!ctrl->opts->discovery_nqn && !ctrl->kas) { | |
1290 | dev_err(ctrl->dev, | |
1291 | "keep-alive support is mandatory for fabrics\n"); | |
1292 | ret = -EINVAL; | |
1293 | } | |
07bfcd09 CH |
1294 | } else { |
1295 | ctrl->cntlid = le16_to_cpu(id->cntlid); | |
1296 | } | |
da35825d | 1297 | |
7fd8930f | 1298 | kfree(id); |
07bfcd09 | 1299 | return ret; |
7fd8930f | 1300 | } |
576d55d6 | 1301 | EXPORT_SYMBOL_GPL(nvme_init_identify); |
7fd8930f | 1302 | |
f3ca80fc | 1303 | static int nvme_dev_open(struct inode *inode, struct file *file) |
1673f1f0 | 1304 | { |
f3ca80fc CH |
1305 | struct nvme_ctrl *ctrl; |
1306 | int instance = iminor(inode); | |
1307 | int ret = -ENODEV; | |
1673f1f0 | 1308 | |
f3ca80fc CH |
1309 | spin_lock(&dev_list_lock); |
1310 | list_for_each_entry(ctrl, &nvme_ctrl_list, node) { | |
1311 | if (ctrl->instance != instance) | |
1312 | continue; | |
1313 | ||
1314 | if (!ctrl->admin_q) { | |
1315 | ret = -EWOULDBLOCK; | |
1316 | break; | |
1317 | } | |
1318 | if (!kref_get_unless_zero(&ctrl->kref)) | |
1319 | break; | |
1320 | file->private_data = ctrl; | |
1321 | ret = 0; | |
1322 | break; | |
1323 | } | |
1324 | spin_unlock(&dev_list_lock); | |
1325 | ||
1326 | return ret; | |
1673f1f0 CH |
1327 | } |
1328 | ||
f3ca80fc | 1329 | static int nvme_dev_release(struct inode *inode, struct file *file) |
1673f1f0 | 1330 | { |
f3ca80fc CH |
1331 | nvme_put_ctrl(file->private_data); |
1332 | return 0; | |
1333 | } | |
1334 | ||
bfd89471 CH |
1335 | static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
1336 | { | |
1337 | struct nvme_ns *ns; | |
1338 | int ret; | |
1339 | ||
1340 | mutex_lock(&ctrl->namespaces_mutex); | |
1341 | if (list_empty(&ctrl->namespaces)) { | |
1342 | ret = -ENOTTY; | |
1343 | goto out_unlock; | |
1344 | } | |
1345 | ||
1346 | ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); | |
1347 | if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { | |
1b3c47c1 | 1348 | dev_warn(ctrl->device, |
bfd89471 CH |
1349 | "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
1350 | ret = -EINVAL; | |
1351 | goto out_unlock; | |
1352 | } | |
1353 | ||
1b3c47c1 | 1354 | dev_warn(ctrl->device, |
bfd89471 CH |
1355 | "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
1356 | kref_get(&ns->kref); | |
1357 | mutex_unlock(&ctrl->namespaces_mutex); | |
1358 | ||
1359 | ret = nvme_user_cmd(ctrl, ns, argp); | |
1360 | nvme_put_ns(ns); | |
1361 | return ret; | |
1362 | ||
1363 | out_unlock: | |
1364 | mutex_unlock(&ctrl->namespaces_mutex); | |
1365 | return ret; | |
1366 | } | |
1367 | ||
f3ca80fc CH |
1368 | static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
1369 | unsigned long arg) | |
1370 | { | |
1371 | struct nvme_ctrl *ctrl = file->private_data; | |
1372 | void __user *argp = (void __user *)arg; | |
f3ca80fc CH |
1373 | |
1374 | switch (cmd) { | |
1375 | case NVME_IOCTL_ADMIN_CMD: | |
1376 | return nvme_user_cmd(ctrl, NULL, argp); | |
1377 | case NVME_IOCTL_IO_CMD: | |
bfd89471 | 1378 | return nvme_dev_user_cmd(ctrl, argp); |
f3ca80fc | 1379 | case NVME_IOCTL_RESET: |
1b3c47c1 | 1380 | dev_warn(ctrl->device, "resetting controller\n"); |
f3ca80fc CH |
1381 | return ctrl->ops->reset_ctrl(ctrl); |
1382 | case NVME_IOCTL_SUBSYS_RESET: | |
1383 | return nvme_reset_subsystem(ctrl); | |
9ec3bb2f KB |
1384 | case NVME_IOCTL_RESCAN: |
1385 | nvme_queue_scan(ctrl); | |
1386 | return 0; | |
f3ca80fc CH |
1387 | default: |
1388 | return -ENOTTY; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | static const struct file_operations nvme_dev_fops = { | |
1393 | .owner = THIS_MODULE, | |
1394 | .open = nvme_dev_open, | |
1395 | .release = nvme_dev_release, | |
1396 | .unlocked_ioctl = nvme_dev_ioctl, | |
1397 | .compat_ioctl = nvme_dev_ioctl, | |
1398 | }; | |
1399 | ||
1400 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
1401 | struct device_attribute *attr, const char *buf, | |
1402 | size_t count) | |
1403 | { | |
1404 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1405 | int ret; | |
1406 | ||
1407 | ret = ctrl->ops->reset_ctrl(ctrl); | |
1408 | if (ret < 0) | |
1409 | return ret; | |
1410 | return count; | |
1673f1f0 | 1411 | } |
f3ca80fc | 1412 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
1673f1f0 | 1413 | |
9ec3bb2f KB |
1414 | static ssize_t nvme_sysfs_rescan(struct device *dev, |
1415 | struct device_attribute *attr, const char *buf, | |
1416 | size_t count) | |
1417 | { | |
1418 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1419 | ||
1420 | nvme_queue_scan(ctrl); | |
1421 | return count; | |
1422 | } | |
1423 | static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); | |
1424 | ||
118472ab KB |
1425 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
1426 | char *buf) | |
1427 | { | |
40267efd | 1428 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
118472ab KB |
1429 | struct nvme_ctrl *ctrl = ns->ctrl; |
1430 | int serial_len = sizeof(ctrl->serial); | |
1431 | int model_len = sizeof(ctrl->model); | |
1432 | ||
1433 | if (memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1434 | return sprintf(buf, "eui.%16phN\n", ns->uuid); | |
1435 | ||
1436 | if (memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1437 | return sprintf(buf, "eui.%8phN\n", ns->eui); | |
1438 | ||
1439 | while (ctrl->serial[serial_len - 1] == ' ') | |
1440 | serial_len--; | |
1441 | while (ctrl->model[model_len - 1] == ' ') | |
1442 | model_len--; | |
1443 | ||
1444 | return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", ctrl->vid, | |
1445 | serial_len, ctrl->serial, model_len, ctrl->model, ns->ns_id); | |
1446 | } | |
1447 | static DEVICE_ATTR(wwid, S_IRUGO, wwid_show, NULL); | |
1448 | ||
2b9b6e86 KB |
1449 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
1450 | char *buf) | |
1451 | { | |
40267efd | 1452 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1453 | return sprintf(buf, "%pU\n", ns->uuid); |
1454 | } | |
1455 | static DEVICE_ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
1456 | ||
1457 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, | |
1458 | char *buf) | |
1459 | { | |
40267efd | 1460 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1461 | return sprintf(buf, "%8phd\n", ns->eui); |
1462 | } | |
1463 | static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL); | |
1464 | ||
1465 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, | |
1466 | char *buf) | |
1467 | { | |
40267efd | 1468 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1469 | return sprintf(buf, "%d\n", ns->ns_id); |
1470 | } | |
1471 | static DEVICE_ATTR(nsid, S_IRUGO, nsid_show, NULL); | |
1472 | ||
1473 | static struct attribute *nvme_ns_attrs[] = { | |
118472ab | 1474 | &dev_attr_wwid.attr, |
2b9b6e86 KB |
1475 | &dev_attr_uuid.attr, |
1476 | &dev_attr_eui.attr, | |
1477 | &dev_attr_nsid.attr, | |
1478 | NULL, | |
1479 | }; | |
1480 | ||
1a353d85 | 1481 | static umode_t nvme_ns_attrs_are_visible(struct kobject *kobj, |
2b9b6e86 KB |
1482 | struct attribute *a, int n) |
1483 | { | |
1484 | struct device *dev = container_of(kobj, struct device, kobj); | |
40267efd | 1485 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1486 | |
1487 | if (a == &dev_attr_uuid.attr) { | |
1488 | if (!memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1489 | return 0; | |
1490 | } | |
1491 | if (a == &dev_attr_eui.attr) { | |
1492 | if (!memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1493 | return 0; | |
1494 | } | |
1495 | return a->mode; | |
1496 | } | |
1497 | ||
1498 | static const struct attribute_group nvme_ns_attr_group = { | |
1499 | .attrs = nvme_ns_attrs, | |
1a353d85 | 1500 | .is_visible = nvme_ns_attrs_are_visible, |
2b9b6e86 KB |
1501 | }; |
1502 | ||
931e1c22 | 1503 | #define nvme_show_str_function(field) \ |
779ff756 KB |
1504 | static ssize_t field##_show(struct device *dev, \ |
1505 | struct device_attribute *attr, char *buf) \ | |
1506 | { \ | |
1507 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1508 | return sprintf(buf, "%.*s\n", (int)sizeof(ctrl->field), ctrl->field); \ | |
1509 | } \ | |
1510 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1511 | ||
931e1c22 ML |
1512 | #define nvme_show_int_function(field) \ |
1513 | static ssize_t field##_show(struct device *dev, \ | |
1514 | struct device_attribute *attr, char *buf) \ | |
1515 | { \ | |
1516 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1517 | return sprintf(buf, "%d\n", ctrl->field); \ | |
1518 | } \ | |
1519 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1520 | ||
1521 | nvme_show_str_function(model); | |
1522 | nvme_show_str_function(serial); | |
1523 | nvme_show_str_function(firmware_rev); | |
1524 | nvme_show_int_function(cntlid); | |
779ff756 | 1525 | |
1a353d85 ML |
1526 | static ssize_t nvme_sysfs_delete(struct device *dev, |
1527 | struct device_attribute *attr, const char *buf, | |
1528 | size_t count) | |
1529 | { | |
1530 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1531 | ||
1532 | if (device_remove_file_self(dev, attr)) | |
1533 | ctrl->ops->delete_ctrl(ctrl); | |
1534 | return count; | |
1535 | } | |
1536 | static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); | |
1537 | ||
1538 | static ssize_t nvme_sysfs_show_transport(struct device *dev, | |
1539 | struct device_attribute *attr, | |
1540 | char *buf) | |
1541 | { | |
1542 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1543 | ||
1544 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); | |
1545 | } | |
1546 | static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); | |
1547 | ||
1548 | static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, | |
1549 | struct device_attribute *attr, | |
1550 | char *buf) | |
1551 | { | |
1552 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1553 | ||
1554 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
1555 | ctrl->ops->get_subsysnqn(ctrl)); | |
1556 | } | |
1557 | static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); | |
1558 | ||
1559 | static ssize_t nvme_sysfs_show_address(struct device *dev, | |
1560 | struct device_attribute *attr, | |
1561 | char *buf) | |
1562 | { | |
1563 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1564 | ||
1565 | return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); | |
1566 | } | |
1567 | static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); | |
1568 | ||
779ff756 KB |
1569 | static struct attribute *nvme_dev_attrs[] = { |
1570 | &dev_attr_reset_controller.attr, | |
9ec3bb2f | 1571 | &dev_attr_rescan_controller.attr, |
779ff756 KB |
1572 | &dev_attr_model.attr, |
1573 | &dev_attr_serial.attr, | |
1574 | &dev_attr_firmware_rev.attr, | |
931e1c22 | 1575 | &dev_attr_cntlid.attr, |
1a353d85 ML |
1576 | &dev_attr_delete_controller.attr, |
1577 | &dev_attr_transport.attr, | |
1578 | &dev_attr_subsysnqn.attr, | |
1579 | &dev_attr_address.attr, | |
779ff756 KB |
1580 | NULL |
1581 | }; | |
1582 | ||
1a353d85 ML |
1583 | #define CHECK_ATTR(ctrl, a, name) \ |
1584 | if ((a) == &dev_attr_##name.attr && \ | |
1585 | !(ctrl)->ops->get_##name) \ | |
1586 | return 0 | |
1587 | ||
1588 | static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, | |
1589 | struct attribute *a, int n) | |
1590 | { | |
1591 | struct device *dev = container_of(kobj, struct device, kobj); | |
1592 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1593 | ||
1594 | if (a == &dev_attr_delete_controller.attr) { | |
1595 | if (!ctrl->ops->delete_ctrl) | |
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | CHECK_ATTR(ctrl, a, subsysnqn); | |
1600 | CHECK_ATTR(ctrl, a, address); | |
1601 | ||
1602 | return a->mode; | |
1603 | } | |
1604 | ||
779ff756 | 1605 | static struct attribute_group nvme_dev_attrs_group = { |
1a353d85 ML |
1606 | .attrs = nvme_dev_attrs, |
1607 | .is_visible = nvme_dev_attrs_are_visible, | |
779ff756 KB |
1608 | }; |
1609 | ||
1610 | static const struct attribute_group *nvme_dev_attr_groups[] = { | |
1611 | &nvme_dev_attrs_group, | |
1612 | NULL, | |
1613 | }; | |
1614 | ||
5bae7f73 CH |
1615 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
1616 | { | |
1617 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); | |
1618 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); | |
1619 | ||
1620 | return nsa->ns_id - nsb->ns_id; | |
1621 | } | |
1622 | ||
32f0c4af | 1623 | static struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
5bae7f73 | 1624 | { |
32f0c4af | 1625 | struct nvme_ns *ns, *ret = NULL; |
69d3b8ac | 1626 | |
32f0c4af | 1627 | mutex_lock(&ctrl->namespaces_mutex); |
5bae7f73 | 1628 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
32f0c4af KB |
1629 | if (ns->ns_id == nsid) { |
1630 | kref_get(&ns->kref); | |
1631 | ret = ns; | |
1632 | break; | |
1633 | } | |
5bae7f73 CH |
1634 | if (ns->ns_id > nsid) |
1635 | break; | |
1636 | } | |
32f0c4af KB |
1637 | mutex_unlock(&ctrl->namespaces_mutex); |
1638 | return ret; | |
5bae7f73 CH |
1639 | } |
1640 | ||
1641 | static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) | |
1642 | { | |
1643 | struct nvme_ns *ns; | |
1644 | struct gendisk *disk; | |
ac81bfa9 MB |
1645 | struct nvme_id_ns *id; |
1646 | char disk_name[DISK_NAME_LEN]; | |
5bae7f73 CH |
1647 | int node = dev_to_node(ctrl->dev); |
1648 | ||
1649 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); | |
1650 | if (!ns) | |
1651 | return; | |
1652 | ||
075790eb KB |
1653 | ns->instance = ida_simple_get(&ctrl->ns_ida, 1, 0, GFP_KERNEL); |
1654 | if (ns->instance < 0) | |
1655 | goto out_free_ns; | |
1656 | ||
5bae7f73 CH |
1657 | ns->queue = blk_mq_init_queue(ctrl->tagset); |
1658 | if (IS_ERR(ns->queue)) | |
075790eb | 1659 | goto out_release_instance; |
5bae7f73 CH |
1660 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); |
1661 | ns->queue->queuedata = ns; | |
1662 | ns->ctrl = ctrl; | |
1663 | ||
5bae7f73 CH |
1664 | kref_init(&ns->kref); |
1665 | ns->ns_id = nsid; | |
5bae7f73 | 1666 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
5bae7f73 CH |
1667 | |
1668 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); | |
da35825d | 1669 | nvme_set_queue_limits(ctrl, ns->queue); |
5bae7f73 | 1670 | |
ac81bfa9 | 1671 | sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance); |
5bae7f73 | 1672 | |
ac81bfa9 MB |
1673 | if (nvme_revalidate_ns(ns, &id)) |
1674 | goto out_free_queue; | |
1675 | ||
1676 | if (nvme_nvm_ns_supported(ns, id)) { | |
40267efd SL |
1677 | if (nvme_nvm_register(ns, disk_name, node, |
1678 | &nvme_ns_attr_group)) { | |
b0b4e09c MB |
1679 | dev_warn(ctrl->dev, "%s: LightNVM init failure\n", |
1680 | __func__); | |
ac81bfa9 MB |
1681 | goto out_free_id; |
1682 | } | |
ac81bfa9 MB |
1683 | } else { |
1684 | disk = alloc_disk_node(0, node); | |
1685 | if (!disk) | |
1686 | goto out_free_id; | |
1687 | ||
1688 | disk->fops = &nvme_fops; | |
1689 | disk->private_data = ns; | |
1690 | disk->queue = ns->queue; | |
1691 | disk->flags = GENHD_FL_EXT_DEVT; | |
1692 | memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); | |
1693 | ns->disk = disk; | |
1694 | ||
1695 | __nvme_revalidate_disk(disk, id); | |
1696 | } | |
5bae7f73 | 1697 | |
32f0c4af KB |
1698 | mutex_lock(&ctrl->namespaces_mutex); |
1699 | list_add_tail(&ns->list, &ctrl->namespaces); | |
1700 | mutex_unlock(&ctrl->namespaces_mutex); | |
1701 | ||
5bae7f73 | 1702 | kref_get(&ctrl->kref); |
ac81bfa9 MB |
1703 | |
1704 | kfree(id); | |
1705 | ||
b0b4e09c | 1706 | if (ns->ndev) |
2b9b6e86 | 1707 | return; |
5bae7f73 | 1708 | |
0d52c756 | 1709 | device_add_disk(ctrl->device, ns->disk); |
2b9b6e86 KB |
1710 | if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, |
1711 | &nvme_ns_attr_group)) | |
1712 | pr_warn("%s: failed to create sysfs group for identification\n", | |
1713 | ns->disk->disk_name); | |
5bae7f73 | 1714 | return; |
ac81bfa9 MB |
1715 | out_free_id: |
1716 | kfree(id); | |
5bae7f73 CH |
1717 | out_free_queue: |
1718 | blk_cleanup_queue(ns->queue); | |
075790eb KB |
1719 | out_release_instance: |
1720 | ida_simple_remove(&ctrl->ns_ida, ns->instance); | |
5bae7f73 CH |
1721 | out_free_ns: |
1722 | kfree(ns); | |
1723 | } | |
1724 | ||
1725 | static void nvme_ns_remove(struct nvme_ns *ns) | |
1726 | { | |
646017a6 KB |
1727 | if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
1728 | return; | |
69d3b8ac | 1729 | |
b0b4e09c | 1730 | if (ns->disk && ns->disk->flags & GENHD_FL_UP) { |
5bae7f73 CH |
1731 | if (blk_get_integrity(ns->disk)) |
1732 | blk_integrity_unregister(ns->disk); | |
2b9b6e86 KB |
1733 | sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, |
1734 | &nvme_ns_attr_group); | |
5bae7f73 | 1735 | del_gendisk(ns->disk); |
5bae7f73 CH |
1736 | blk_mq_abort_requeue_list(ns->queue); |
1737 | blk_cleanup_queue(ns->queue); | |
1738 | } | |
32f0c4af KB |
1739 | |
1740 | mutex_lock(&ns->ctrl->namespaces_mutex); | |
5bae7f73 | 1741 | list_del_init(&ns->list); |
32f0c4af KB |
1742 | mutex_unlock(&ns->ctrl->namespaces_mutex); |
1743 | ||
5bae7f73 CH |
1744 | nvme_put_ns(ns); |
1745 | } | |
1746 | ||
540c801c KB |
1747 | static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
1748 | { | |
1749 | struct nvme_ns *ns; | |
1750 | ||
32f0c4af | 1751 | ns = nvme_find_get_ns(ctrl, nsid); |
540c801c | 1752 | if (ns) { |
b0b4e09c | 1753 | if (ns->disk && revalidate_disk(ns->disk)) |
540c801c | 1754 | nvme_ns_remove(ns); |
32f0c4af | 1755 | nvme_put_ns(ns); |
540c801c KB |
1756 | } else |
1757 | nvme_alloc_ns(ctrl, nsid); | |
1758 | } | |
1759 | ||
47b0e50a SB |
1760 | static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
1761 | unsigned nsid) | |
1762 | { | |
1763 | struct nvme_ns *ns, *next; | |
1764 | ||
1765 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { | |
1766 | if (ns->ns_id > nsid) | |
1767 | nvme_ns_remove(ns); | |
1768 | } | |
1769 | } | |
1770 | ||
540c801c KB |
1771 | static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn) |
1772 | { | |
1773 | struct nvme_ns *ns; | |
1774 | __le32 *ns_list; | |
1775 | unsigned i, j, nsid, prev = 0, num_lists = DIV_ROUND_UP(nn, 1024); | |
1776 | int ret = 0; | |
1777 | ||
1778 | ns_list = kzalloc(0x1000, GFP_KERNEL); | |
1779 | if (!ns_list) | |
1780 | return -ENOMEM; | |
1781 | ||
1782 | for (i = 0; i < num_lists; i++) { | |
1783 | ret = nvme_identify_ns_list(ctrl, prev, ns_list); | |
1784 | if (ret) | |
47b0e50a | 1785 | goto free; |
540c801c KB |
1786 | |
1787 | for (j = 0; j < min(nn, 1024U); j++) { | |
1788 | nsid = le32_to_cpu(ns_list[j]); | |
1789 | if (!nsid) | |
1790 | goto out; | |
1791 | ||
1792 | nvme_validate_ns(ctrl, nsid); | |
1793 | ||
1794 | while (++prev < nsid) { | |
32f0c4af KB |
1795 | ns = nvme_find_get_ns(ctrl, prev); |
1796 | if (ns) { | |
540c801c | 1797 | nvme_ns_remove(ns); |
32f0c4af KB |
1798 | nvme_put_ns(ns); |
1799 | } | |
540c801c KB |
1800 | } |
1801 | } | |
1802 | nn -= j; | |
1803 | } | |
1804 | out: | |
47b0e50a SB |
1805 | nvme_remove_invalid_namespaces(ctrl, prev); |
1806 | free: | |
540c801c KB |
1807 | kfree(ns_list); |
1808 | return ret; | |
1809 | } | |
1810 | ||
5955be21 | 1811 | static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl, unsigned nn) |
5bae7f73 | 1812 | { |
5bae7f73 CH |
1813 | unsigned i; |
1814 | ||
540c801c KB |
1815 | for (i = 1; i <= nn; i++) |
1816 | nvme_validate_ns(ctrl, i); | |
1817 | ||
47b0e50a | 1818 | nvme_remove_invalid_namespaces(ctrl, nn); |
5bae7f73 CH |
1819 | } |
1820 | ||
5955be21 | 1821 | static void nvme_scan_work(struct work_struct *work) |
5bae7f73 | 1822 | { |
5955be21 CH |
1823 | struct nvme_ctrl *ctrl = |
1824 | container_of(work, struct nvme_ctrl, scan_work); | |
5bae7f73 | 1825 | struct nvme_id_ctrl *id; |
540c801c | 1826 | unsigned nn; |
5bae7f73 | 1827 | |
5955be21 CH |
1828 | if (ctrl->state != NVME_CTRL_LIVE) |
1829 | return; | |
1830 | ||
5bae7f73 CH |
1831 | if (nvme_identify_ctrl(ctrl, &id)) |
1832 | return; | |
540c801c KB |
1833 | |
1834 | nn = le32_to_cpu(id->nn); | |
1835 | if (ctrl->vs >= NVME_VS(1, 1) && | |
1836 | !(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) { | |
1837 | if (!nvme_scan_ns_list(ctrl, nn)) | |
1838 | goto done; | |
1839 | } | |
5955be21 | 1840 | nvme_scan_ns_sequential(ctrl, nn); |
540c801c | 1841 | done: |
32f0c4af | 1842 | mutex_lock(&ctrl->namespaces_mutex); |
540c801c | 1843 | list_sort(NULL, &ctrl->namespaces, ns_cmp); |
69d3b8ac | 1844 | mutex_unlock(&ctrl->namespaces_mutex); |
5bae7f73 CH |
1845 | kfree(id); |
1846 | } | |
5955be21 CH |
1847 | |
1848 | void nvme_queue_scan(struct nvme_ctrl *ctrl) | |
1849 | { | |
1850 | /* | |
1851 | * Do not queue new scan work when a controller is reset during | |
1852 | * removal. | |
1853 | */ | |
1854 | if (ctrl->state == NVME_CTRL_LIVE) | |
1855 | schedule_work(&ctrl->scan_work); | |
1856 | } | |
1857 | EXPORT_SYMBOL_GPL(nvme_queue_scan); | |
5bae7f73 | 1858 | |
32f0c4af KB |
1859 | /* |
1860 | * This function iterates the namespace list unlocked to allow recovery from | |
1861 | * controller failure. It is up to the caller to ensure the namespace list is | |
1862 | * not modified by scan work while this function is executing. | |
1863 | */ | |
5bae7f73 CH |
1864 | void nvme_remove_namespaces(struct nvme_ctrl *ctrl) |
1865 | { | |
1866 | struct nvme_ns *ns, *next; | |
1867 | ||
0ff9d4e1 KB |
1868 | /* |
1869 | * The dead states indicates the controller was not gracefully | |
1870 | * disconnected. In that case, we won't be able to flush any data while | |
1871 | * removing the namespaces' disks; fail all the queues now to avoid | |
1872 | * potentially having to clean up the failed sync later. | |
1873 | */ | |
1874 | if (ctrl->state == NVME_CTRL_DEAD) | |
1875 | nvme_kill_queues(ctrl); | |
1876 | ||
5bae7f73 CH |
1877 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) |
1878 | nvme_ns_remove(ns); | |
1879 | } | |
576d55d6 | 1880 | EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
5bae7f73 | 1881 | |
f866fc42 CH |
1882 | static void nvme_async_event_work(struct work_struct *work) |
1883 | { | |
1884 | struct nvme_ctrl *ctrl = | |
1885 | container_of(work, struct nvme_ctrl, async_event_work); | |
1886 | ||
1887 | spin_lock_irq(&ctrl->lock); | |
1888 | while (ctrl->event_limit > 0) { | |
1889 | int aer_idx = --ctrl->event_limit; | |
1890 | ||
1891 | spin_unlock_irq(&ctrl->lock); | |
1892 | ctrl->ops->submit_async_event(ctrl, aer_idx); | |
1893 | spin_lock_irq(&ctrl->lock); | |
1894 | } | |
1895 | spin_unlock_irq(&ctrl->lock); | |
1896 | } | |
1897 | ||
7bf58533 CH |
1898 | void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, |
1899 | union nvme_result *res) | |
f866fc42 | 1900 | { |
7bf58533 CH |
1901 | u32 result = le32_to_cpu(res->u32); |
1902 | bool done = true; | |
f866fc42 | 1903 | |
7bf58533 CH |
1904 | switch (le16_to_cpu(status) >> 1) { |
1905 | case NVME_SC_SUCCESS: | |
1906 | done = false; | |
1907 | /*FALLTHRU*/ | |
1908 | case NVME_SC_ABORT_REQ: | |
f866fc42 CH |
1909 | ++ctrl->event_limit; |
1910 | schedule_work(&ctrl->async_event_work); | |
7bf58533 CH |
1911 | break; |
1912 | default: | |
1913 | break; | |
f866fc42 CH |
1914 | } |
1915 | ||
7bf58533 | 1916 | if (done) |
f866fc42 CH |
1917 | return; |
1918 | ||
1919 | switch (result & 0xff07) { | |
1920 | case NVME_AER_NOTICE_NS_CHANGED: | |
1921 | dev_info(ctrl->device, "rescanning\n"); | |
1922 | nvme_queue_scan(ctrl); | |
1923 | break; | |
1924 | default: | |
1925 | dev_warn(ctrl->device, "async event result %08x\n", result); | |
1926 | } | |
1927 | } | |
1928 | EXPORT_SYMBOL_GPL(nvme_complete_async_event); | |
1929 | ||
1930 | void nvme_queue_async_events(struct nvme_ctrl *ctrl) | |
1931 | { | |
1932 | ctrl->event_limit = NVME_NR_AERS; | |
1933 | schedule_work(&ctrl->async_event_work); | |
1934 | } | |
1935 | EXPORT_SYMBOL_GPL(nvme_queue_async_events); | |
1936 | ||
f3ca80fc CH |
1937 | static DEFINE_IDA(nvme_instance_ida); |
1938 | ||
1939 | static int nvme_set_instance(struct nvme_ctrl *ctrl) | |
1940 | { | |
1941 | int instance, error; | |
1942 | ||
1943 | do { | |
1944 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) | |
1945 | return -ENODEV; | |
1946 | ||
1947 | spin_lock(&dev_list_lock); | |
1948 | error = ida_get_new(&nvme_instance_ida, &instance); | |
1949 | spin_unlock(&dev_list_lock); | |
1950 | } while (error == -EAGAIN); | |
1951 | ||
1952 | if (error) | |
1953 | return -ENODEV; | |
1954 | ||
1955 | ctrl->instance = instance; | |
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | static void nvme_release_instance(struct nvme_ctrl *ctrl) | |
1960 | { | |
1961 | spin_lock(&dev_list_lock); | |
1962 | ida_remove(&nvme_instance_ida, ctrl->instance); | |
1963 | spin_unlock(&dev_list_lock); | |
1964 | } | |
1965 | ||
53029b04 | 1966 | void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
576d55d6 | 1967 | { |
f866fc42 | 1968 | flush_work(&ctrl->async_event_work); |
5955be21 CH |
1969 | flush_work(&ctrl->scan_work); |
1970 | nvme_remove_namespaces(ctrl); | |
1971 | ||
53029b04 | 1972 | device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance)); |
f3ca80fc CH |
1973 | |
1974 | spin_lock(&dev_list_lock); | |
1975 | list_del(&ctrl->node); | |
1976 | spin_unlock(&dev_list_lock); | |
53029b04 | 1977 | } |
576d55d6 | 1978 | EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
53029b04 KB |
1979 | |
1980 | static void nvme_free_ctrl(struct kref *kref) | |
1981 | { | |
1982 | struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref); | |
f3ca80fc CH |
1983 | |
1984 | put_device(ctrl->device); | |
1985 | nvme_release_instance(ctrl); | |
075790eb | 1986 | ida_destroy(&ctrl->ns_ida); |
f3ca80fc CH |
1987 | |
1988 | ctrl->ops->free_ctrl(ctrl); | |
1989 | } | |
1990 | ||
1991 | void nvme_put_ctrl(struct nvme_ctrl *ctrl) | |
1992 | { | |
1993 | kref_put(&ctrl->kref, nvme_free_ctrl); | |
1994 | } | |
576d55d6 | 1995 | EXPORT_SYMBOL_GPL(nvme_put_ctrl); |
f3ca80fc CH |
1996 | |
1997 | /* | |
1998 | * Initialize a NVMe controller structures. This needs to be called during | |
1999 | * earliest initialization so that we have the initialized structured around | |
2000 | * during probing. | |
2001 | */ | |
2002 | int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, | |
2003 | const struct nvme_ctrl_ops *ops, unsigned long quirks) | |
2004 | { | |
2005 | int ret; | |
2006 | ||
bb8d261e CH |
2007 | ctrl->state = NVME_CTRL_NEW; |
2008 | spin_lock_init(&ctrl->lock); | |
f3ca80fc | 2009 | INIT_LIST_HEAD(&ctrl->namespaces); |
69d3b8ac | 2010 | mutex_init(&ctrl->namespaces_mutex); |
f3ca80fc CH |
2011 | kref_init(&ctrl->kref); |
2012 | ctrl->dev = dev; | |
2013 | ctrl->ops = ops; | |
2014 | ctrl->quirks = quirks; | |
5955be21 | 2015 | INIT_WORK(&ctrl->scan_work, nvme_scan_work); |
f866fc42 | 2016 | INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); |
f3ca80fc CH |
2017 | |
2018 | ret = nvme_set_instance(ctrl); | |
2019 | if (ret) | |
2020 | goto out; | |
2021 | ||
779ff756 | 2022 | ctrl->device = device_create_with_groups(nvme_class, ctrl->dev, |
f3ca80fc | 2023 | MKDEV(nvme_char_major, ctrl->instance), |
f4f0f63e | 2024 | ctrl, nvme_dev_attr_groups, |
779ff756 | 2025 | "nvme%d", ctrl->instance); |
f3ca80fc CH |
2026 | if (IS_ERR(ctrl->device)) { |
2027 | ret = PTR_ERR(ctrl->device); | |
2028 | goto out_release_instance; | |
2029 | } | |
2030 | get_device(ctrl->device); | |
075790eb | 2031 | ida_init(&ctrl->ns_ida); |
f3ca80fc | 2032 | |
f3ca80fc CH |
2033 | spin_lock(&dev_list_lock); |
2034 | list_add_tail(&ctrl->node, &nvme_ctrl_list); | |
2035 | spin_unlock(&dev_list_lock); | |
2036 | ||
2037 | return 0; | |
f3ca80fc CH |
2038 | out_release_instance: |
2039 | nvme_release_instance(ctrl); | |
2040 | out: | |
2041 | return ret; | |
2042 | } | |
576d55d6 | 2043 | EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
f3ca80fc | 2044 | |
69d9a99c KB |
2045 | /** |
2046 | * nvme_kill_queues(): Ends all namespace queues | |
2047 | * @ctrl: the dead controller that needs to end | |
2048 | * | |
2049 | * Call this function when the driver determines it is unable to get the | |
2050 | * controller in a state capable of servicing IO. | |
2051 | */ | |
2052 | void nvme_kill_queues(struct nvme_ctrl *ctrl) | |
2053 | { | |
2054 | struct nvme_ns *ns; | |
2055 | ||
32f0c4af KB |
2056 | mutex_lock(&ctrl->namespaces_mutex); |
2057 | list_for_each_entry(ns, &ctrl->namespaces, list) { | |
69d9a99c KB |
2058 | /* |
2059 | * Revalidating a dead namespace sets capacity to 0. This will | |
2060 | * end buffered writers dirtying pages that can't be synced. | |
2061 | */ | |
b0b4e09c | 2062 | if (ns->disk && !test_and_set_bit(NVME_NS_DEAD, &ns->flags)) |
69d9a99c KB |
2063 | revalidate_disk(ns->disk); |
2064 | ||
2065 | blk_set_queue_dying(ns->queue); | |
2066 | blk_mq_abort_requeue_list(ns->queue); | |
2067 | blk_mq_start_stopped_hw_queues(ns->queue, true); | |
69d9a99c | 2068 | } |
32f0c4af | 2069 | mutex_unlock(&ctrl->namespaces_mutex); |
69d9a99c | 2070 | } |
237045fc | 2071 | EXPORT_SYMBOL_GPL(nvme_kill_queues); |
69d9a99c | 2072 | |
25646264 | 2073 | void nvme_stop_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
2074 | { |
2075 | struct nvme_ns *ns; | |
2076 | ||
32f0c4af | 2077 | mutex_lock(&ctrl->namespaces_mutex); |
a6eaa884 | 2078 | list_for_each_entry(ns, &ctrl->namespaces, list) |
3174dd33 | 2079 | blk_mq_quiesce_queue(ns->queue); |
32f0c4af | 2080 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 2081 | } |
576d55d6 | 2082 | EXPORT_SYMBOL_GPL(nvme_stop_queues); |
363c9aac | 2083 | |
25646264 | 2084 | void nvme_start_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
2085 | { |
2086 | struct nvme_ns *ns; | |
2087 | ||
32f0c4af KB |
2088 | mutex_lock(&ctrl->namespaces_mutex); |
2089 | list_for_each_entry(ns, &ctrl->namespaces, list) { | |
363c9aac SG |
2090 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
2091 | blk_mq_kick_requeue_list(ns->queue); | |
2092 | } | |
32f0c4af | 2093 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 2094 | } |
576d55d6 | 2095 | EXPORT_SYMBOL_GPL(nvme_start_queues); |
363c9aac | 2096 | |
5bae7f73 CH |
2097 | int __init nvme_core_init(void) |
2098 | { | |
2099 | int result; | |
2100 | ||
f3ca80fc CH |
2101 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
2102 | &nvme_dev_fops); | |
2103 | if (result < 0) | |
b09dcf58 | 2104 | return result; |
f3ca80fc CH |
2105 | else if (result > 0) |
2106 | nvme_char_major = result; | |
2107 | ||
2108 | nvme_class = class_create(THIS_MODULE, "nvme"); | |
2109 | if (IS_ERR(nvme_class)) { | |
2110 | result = PTR_ERR(nvme_class); | |
2111 | goto unregister_chrdev; | |
2112 | } | |
2113 | ||
5bae7f73 | 2114 | return 0; |
f3ca80fc CH |
2115 | |
2116 | unregister_chrdev: | |
2117 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
f3ca80fc | 2118 | return result; |
5bae7f73 CH |
2119 | } |
2120 | ||
2121 | void nvme_core_exit(void) | |
2122 | { | |
f3ca80fc CH |
2123 | class_destroy(nvme_class); |
2124 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
5bae7f73 | 2125 | } |
576d55d6 ML |
2126 | |
2127 | MODULE_LICENSE("GPL"); | |
2128 | MODULE_VERSION("1.0"); | |
2129 | module_init(nvme_core_init); | |
2130 | module_exit(nvme_core_exit); |