Commit | Line | Data |
---|---|---|
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; | |
8093f7ca ML |
242 | unsigned int nr_bytes = blk_rq_bytes(req); |
243 | ||
244 | range = kmalloc(sizeof(*range), GFP_ATOMIC); | |
245 | if (!range) | |
246 | return BLK_MQ_RQ_QUEUE_BUSY; | |
247 | ||
248 | range->cattr = cpu_to_le32(0); | |
249 | range->nlb = cpu_to_le32(nr_bytes >> ns->lba_shift); | |
250 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
251 | ||
252 | memset(cmnd, 0, sizeof(*cmnd)); | |
253 | cmnd->dsm.opcode = nvme_cmd_dsm; | |
254 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); | |
255 | cmnd->dsm.nr = 0; | |
256 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); | |
257 | ||
f9d03f96 CH |
258 | req->special_vec.bv_page = virt_to_page(range); |
259 | req->special_vec.bv_offset = offset_in_page(range); | |
260 | req->special_vec.bv_len = sizeof(*range); | |
261 | req->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
8093f7ca | 262 | |
bac0000a | 263 | return BLK_MQ_RQ_QUEUE_OK; |
8093f7ca | 264 | } |
8093f7ca | 265 | |
8093f7ca ML |
266 | static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, |
267 | struct nvme_command *cmnd) | |
268 | { | |
269 | u16 control = 0; | |
270 | u32 dsmgmt = 0; | |
271 | ||
272 | if (req->cmd_flags & REQ_FUA) | |
273 | control |= NVME_RW_FUA; | |
274 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) | |
275 | control |= NVME_RW_LR; | |
276 | ||
277 | if (req->cmd_flags & REQ_RAHEAD) | |
278 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; | |
279 | ||
280 | memset(cmnd, 0, sizeof(*cmnd)); | |
281 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); | |
8093f7ca ML |
282 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); |
283 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
284 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); | |
285 | ||
286 | if (ns->ms) { | |
287 | switch (ns->pi_type) { | |
288 | case NVME_NS_DPS_PI_TYPE3: | |
289 | control |= NVME_RW_PRINFO_PRCHK_GUARD; | |
290 | break; | |
291 | case NVME_NS_DPS_PI_TYPE1: | |
292 | case NVME_NS_DPS_PI_TYPE2: | |
293 | control |= NVME_RW_PRINFO_PRCHK_GUARD | | |
294 | NVME_RW_PRINFO_PRCHK_REF; | |
295 | cmnd->rw.reftag = cpu_to_le32( | |
296 | nvme_block_nr(ns, blk_rq_pos(req))); | |
297 | break; | |
298 | } | |
299 | if (!blk_integrity_rq(req)) | |
300 | control |= NVME_RW_PRINFO_PRACT; | |
301 | } | |
302 | ||
303 | cmnd->rw.control = cpu_to_le16(control); | |
304 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); | |
305 | } | |
306 | ||
307 | int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, | |
308 | struct nvme_command *cmd) | |
309 | { | |
bac0000a | 310 | int ret = BLK_MQ_RQ_QUEUE_OK; |
8093f7ca ML |
311 | |
312 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) | |
d49187e9 | 313 | memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); |
3a5e02ce | 314 | else if (req_op(req) == REQ_OP_FLUSH) |
8093f7ca | 315 | nvme_setup_flush(ns, cmd); |
c2df40df | 316 | else if (req_op(req) == REQ_OP_DISCARD) |
8093f7ca ML |
317 | ret = nvme_setup_discard(ns, req, cmd); |
318 | else | |
319 | nvme_setup_rw(ns, req, cmd); | |
320 | ||
721b3917 JS |
321 | cmd->common.command_id = req->tag; |
322 | ||
8093f7ca ML |
323 | return ret; |
324 | } | |
325 | EXPORT_SYMBOL_GPL(nvme_setup_cmd); | |
326 | ||
4160982e CH |
327 | /* |
328 | * Returns 0 on success. If the result is negative, it's a Linux error code; | |
329 | * if the result is positive, it's an NVM Express status code | |
330 | */ | |
331 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
d49187e9 | 332 | union nvme_result *result, void *buffer, unsigned bufflen, |
eb71f435 | 333 | unsigned timeout, int qid, int at_head, int flags) |
4160982e CH |
334 | { |
335 | struct request *req; | |
336 | int ret; | |
337 | ||
eb71f435 | 338 | req = nvme_alloc_request(q, cmd, flags, qid); |
4160982e CH |
339 | if (IS_ERR(req)) |
340 | return PTR_ERR(req); | |
341 | ||
342 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
343 | ||
21d34711 CH |
344 | if (buffer && bufflen) { |
345 | ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); | |
346 | if (ret) | |
347 | goto out; | |
4160982e CH |
348 | } |
349 | ||
eb71f435 | 350 | blk_execute_rq(req->q, NULL, req, at_head); |
d49187e9 CH |
351 | if (result) |
352 | *result = nvme_req(req)->result; | |
4160982e CH |
353 | ret = req->errors; |
354 | out: | |
355 | blk_mq_free_request(req); | |
356 | return ret; | |
357 | } | |
eb71f435 | 358 | EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); |
4160982e CH |
359 | |
360 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
361 | void *buffer, unsigned bufflen) | |
362 | { | |
eb71f435 CH |
363 | return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, |
364 | NVME_QID_ANY, 0, 0); | |
4160982e | 365 | } |
576d55d6 | 366 | EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
4160982e | 367 | |
0b7f1f26 KB |
368 | int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
369 | void __user *ubuffer, unsigned bufflen, | |
370 | void __user *meta_buffer, unsigned meta_len, u32 meta_seed, | |
371 | u32 *result, unsigned timeout) | |
4160982e | 372 | { |
7a5abb4b | 373 | bool write = nvme_is_write(cmd); |
0b7f1f26 KB |
374 | struct nvme_ns *ns = q->queuedata; |
375 | struct gendisk *disk = ns ? ns->disk : NULL; | |
4160982e | 376 | struct request *req; |
0b7f1f26 KB |
377 | struct bio *bio = NULL; |
378 | void *meta = NULL; | |
4160982e CH |
379 | int ret; |
380 | ||
eb71f435 | 381 | req = nvme_alloc_request(q, cmd, 0, NVME_QID_ANY); |
4160982e CH |
382 | if (IS_ERR(req)) |
383 | return PTR_ERR(req); | |
384 | ||
385 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
386 | ||
387 | if (ubuffer && bufflen) { | |
21d34711 CH |
388 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
389 | GFP_KERNEL); | |
390 | if (ret) | |
391 | goto out; | |
392 | bio = req->bio; | |
21d34711 | 393 | |
0b7f1f26 KB |
394 | if (!disk) |
395 | goto submit; | |
396 | bio->bi_bdev = bdget_disk(disk, 0); | |
397 | if (!bio->bi_bdev) { | |
398 | ret = -ENODEV; | |
399 | goto out_unmap; | |
400 | } | |
401 | ||
e9fc63d6 | 402 | if (meta_buffer && meta_len) { |
0b7f1f26 KB |
403 | struct bio_integrity_payload *bip; |
404 | ||
405 | meta = kmalloc(meta_len, GFP_KERNEL); | |
406 | if (!meta) { | |
407 | ret = -ENOMEM; | |
408 | goto out_unmap; | |
409 | } | |
410 | ||
411 | if (write) { | |
412 | if (copy_from_user(meta, meta_buffer, | |
413 | meta_len)) { | |
414 | ret = -EFAULT; | |
415 | goto out_free_meta; | |
416 | } | |
417 | } | |
418 | ||
419 | bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); | |
06c1e390 KB |
420 | if (IS_ERR(bip)) { |
421 | ret = PTR_ERR(bip); | |
0b7f1f26 KB |
422 | goto out_free_meta; |
423 | } | |
424 | ||
425 | bip->bip_iter.bi_size = meta_len; | |
426 | bip->bip_iter.bi_sector = meta_seed; | |
427 | ||
428 | ret = bio_integrity_add_page(bio, virt_to_page(meta), | |
429 | meta_len, offset_in_page(meta)); | |
430 | if (ret != meta_len) { | |
431 | ret = -ENOMEM; | |
432 | goto out_free_meta; | |
433 | } | |
434 | } | |
435 | } | |
436 | submit: | |
437 | blk_execute_rq(req->q, disk, req, 0); | |
438 | ret = req->errors; | |
21d34711 | 439 | if (result) |
d49187e9 | 440 | *result = le32_to_cpu(nvme_req(req)->result.u32); |
0b7f1f26 KB |
441 | if (meta && !ret && !write) { |
442 | if (copy_to_user(meta_buffer, meta, meta_len)) | |
443 | ret = -EFAULT; | |
444 | } | |
445 | out_free_meta: | |
446 | kfree(meta); | |
447 | out_unmap: | |
448 | if (bio) { | |
449 | if (disk && bio->bi_bdev) | |
450 | bdput(bio->bi_bdev); | |
451 | blk_rq_unmap_user(bio); | |
452 | } | |
21d34711 CH |
453 | out: |
454 | blk_mq_free_request(req); | |
455 | return ret; | |
456 | } | |
457 | ||
0b7f1f26 KB |
458 | int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
459 | void __user *ubuffer, unsigned bufflen, u32 *result, | |
460 | unsigned timeout) | |
461 | { | |
462 | return __nvme_submit_user_cmd(q, cmd, ubuffer, bufflen, NULL, 0, 0, | |
463 | result, timeout); | |
464 | } | |
465 | ||
038bd4cb SG |
466 | static void nvme_keep_alive_end_io(struct request *rq, int error) |
467 | { | |
468 | struct nvme_ctrl *ctrl = rq->end_io_data; | |
469 | ||
470 | blk_mq_free_request(rq); | |
471 | ||
472 | if (error) { | |
473 | dev_err(ctrl->device, | |
474 | "failed nvme_keep_alive_end_io error=%d\n", error); | |
475 | return; | |
476 | } | |
477 | ||
478 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); | |
479 | } | |
480 | ||
481 | static int nvme_keep_alive(struct nvme_ctrl *ctrl) | |
482 | { | |
483 | struct nvme_command c; | |
484 | struct request *rq; | |
485 | ||
486 | memset(&c, 0, sizeof(c)); | |
487 | c.common.opcode = nvme_admin_keep_alive; | |
488 | ||
489 | rq = nvme_alloc_request(ctrl->admin_q, &c, BLK_MQ_REQ_RESERVED, | |
490 | NVME_QID_ANY); | |
491 | if (IS_ERR(rq)) | |
492 | return PTR_ERR(rq); | |
493 | ||
494 | rq->timeout = ctrl->kato * HZ; | |
495 | rq->end_io_data = ctrl; | |
496 | ||
497 | blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | static void nvme_keep_alive_work(struct work_struct *work) | |
503 | { | |
504 | struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), | |
505 | struct nvme_ctrl, ka_work); | |
506 | ||
507 | if (nvme_keep_alive(ctrl)) { | |
508 | /* allocation failure, reset the controller */ | |
509 | dev_err(ctrl->device, "keep-alive failed\n"); | |
510 | ctrl->ops->reset_ctrl(ctrl); | |
511 | return; | |
512 | } | |
513 | } | |
514 | ||
515 | void nvme_start_keep_alive(struct nvme_ctrl *ctrl) | |
516 | { | |
517 | if (unlikely(ctrl->kato == 0)) | |
518 | return; | |
519 | ||
520 | INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); | |
521 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); | |
522 | } | |
523 | EXPORT_SYMBOL_GPL(nvme_start_keep_alive); | |
524 | ||
525 | void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) | |
526 | { | |
527 | if (unlikely(ctrl->kato == 0)) | |
528 | return; | |
529 | ||
530 | cancel_delayed_work_sync(&ctrl->ka_work); | |
531 | } | |
532 | EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); | |
533 | ||
1c63dc66 | 534 | int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
21d34711 CH |
535 | { |
536 | struct nvme_command c = { }; | |
537 | int error; | |
538 | ||
539 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
540 | c.identify.opcode = nvme_admin_identify; | |
fa606826 | 541 | c.identify.cns = cpu_to_le32(NVME_ID_CNS_CTRL); |
21d34711 CH |
542 | |
543 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); | |
544 | if (!*id) | |
545 | return -ENOMEM; | |
546 | ||
547 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
548 | sizeof(struct nvme_id_ctrl)); | |
549 | if (error) | |
550 | kfree(*id); | |
551 | return error; | |
552 | } | |
553 | ||
540c801c KB |
554 | static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list) |
555 | { | |
556 | struct nvme_command c = { }; | |
557 | ||
558 | c.identify.opcode = nvme_admin_identify; | |
fa606826 | 559 | c.identify.cns = cpu_to_le32(NVME_ID_CNS_NS_ACTIVE_LIST); |
540c801c KB |
560 | c.identify.nsid = cpu_to_le32(nsid); |
561 | return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, 0x1000); | |
562 | } | |
563 | ||
1c63dc66 | 564 | int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, |
21d34711 CH |
565 | struct nvme_id_ns **id) |
566 | { | |
567 | struct nvme_command c = { }; | |
568 | int error; | |
569 | ||
570 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
571 | c.identify.opcode = nvme_admin_identify, | |
572 | c.identify.nsid = cpu_to_le32(nsid), | |
573 | ||
574 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); | |
575 | if (!*id) | |
576 | return -ENOMEM; | |
577 | ||
578 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
579 | sizeof(struct nvme_id_ns)); | |
580 | if (error) | |
581 | kfree(*id); | |
582 | return error; | |
583 | } | |
584 | ||
1c63dc66 | 585 | int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, |
1a6fe74d | 586 | void *buffer, size_t buflen, u32 *result) |
21d34711 CH |
587 | { |
588 | struct nvme_command c; | |
d49187e9 | 589 | union nvme_result res; |
1cb3cce5 | 590 | int ret; |
21d34711 CH |
591 | |
592 | memset(&c, 0, sizeof(c)); | |
593 | c.features.opcode = nvme_admin_get_features; | |
594 | c.features.nsid = cpu_to_le32(nsid); | |
21d34711 CH |
595 | c.features.fid = cpu_to_le32(fid); |
596 | ||
d49187e9 | 597 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, buffer, buflen, 0, |
eb71f435 | 598 | NVME_QID_ANY, 0, 0); |
9b47f77a | 599 | if (ret >= 0 && result) |
d49187e9 | 600 | *result = le32_to_cpu(res.u32); |
1cb3cce5 | 601 | return ret; |
21d34711 CH |
602 | } |
603 | ||
1c63dc66 | 604 | int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, |
1a6fe74d | 605 | void *buffer, size_t buflen, u32 *result) |
21d34711 CH |
606 | { |
607 | struct nvme_command c; | |
d49187e9 | 608 | union nvme_result res; |
1cb3cce5 | 609 | int ret; |
21d34711 CH |
610 | |
611 | memset(&c, 0, sizeof(c)); | |
612 | c.features.opcode = nvme_admin_set_features; | |
21d34711 CH |
613 | c.features.fid = cpu_to_le32(fid); |
614 | c.features.dword11 = cpu_to_le32(dword11); | |
615 | ||
d49187e9 | 616 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, |
1a6fe74d | 617 | buffer, buflen, 0, NVME_QID_ANY, 0, 0); |
9b47f77a | 618 | if (ret >= 0 && result) |
d49187e9 | 619 | *result = le32_to_cpu(res.u32); |
1cb3cce5 | 620 | return ret; |
21d34711 CH |
621 | } |
622 | ||
1c63dc66 | 623 | int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log) |
21d34711 CH |
624 | { |
625 | struct nvme_command c = { }; | |
626 | int error; | |
627 | ||
628 | c.common.opcode = nvme_admin_get_log_page, | |
629 | c.common.nsid = cpu_to_le32(0xFFFFFFFF), | |
630 | c.common.cdw10[0] = cpu_to_le32( | |
631 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | | |
632 | NVME_LOG_SMART), | |
633 | ||
634 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); | |
635 | if (!*log) | |
636 | return -ENOMEM; | |
637 | ||
638 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, | |
639 | sizeof(struct nvme_smart_log)); | |
640 | if (error) | |
641 | kfree(*log); | |
642 | return error; | |
643 | } | |
1673f1f0 | 644 | |
9a0be7ab CH |
645 | int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
646 | { | |
647 | u32 q_count = (*count - 1) | ((*count - 1) << 16); | |
648 | u32 result; | |
649 | int status, nr_io_queues; | |
650 | ||
1a6fe74d | 651 | status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, |
9a0be7ab | 652 | &result); |
f5fa90dc | 653 | if (status < 0) |
9a0be7ab CH |
654 | return status; |
655 | ||
f5fa90dc CH |
656 | /* |
657 | * Degraded controllers might return an error when setting the queue | |
658 | * count. We still want to be able to bring them online and offer | |
659 | * access to the admin queue, as that might be only way to fix them up. | |
660 | */ | |
661 | if (status > 0) { | |
662 | dev_err(ctrl->dev, "Could not set queue count (%d)\n", status); | |
663 | *count = 0; | |
664 | } else { | |
665 | nr_io_queues = min(result & 0xffff, result >> 16) + 1; | |
666 | *count = min(*count, nr_io_queues); | |
667 | } | |
668 | ||
9a0be7ab CH |
669 | return 0; |
670 | } | |
576d55d6 | 671 | EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
9a0be7ab | 672 | |
1673f1f0 CH |
673 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
674 | { | |
675 | struct nvme_user_io io; | |
676 | struct nvme_command c; | |
677 | unsigned length, meta_len; | |
678 | void __user *metadata; | |
679 | ||
680 | if (copy_from_user(&io, uio, sizeof(io))) | |
681 | return -EFAULT; | |
63088ec7 KB |
682 | if (io.flags) |
683 | return -EINVAL; | |
1673f1f0 CH |
684 | |
685 | switch (io.opcode) { | |
686 | case nvme_cmd_write: | |
687 | case nvme_cmd_read: | |
688 | case nvme_cmd_compare: | |
689 | break; | |
690 | default: | |
691 | return -EINVAL; | |
692 | } | |
693 | ||
694 | length = (io.nblocks + 1) << ns->lba_shift; | |
695 | meta_len = (io.nblocks + 1) * ns->ms; | |
696 | metadata = (void __user *)(uintptr_t)io.metadata; | |
697 | ||
698 | if (ns->ext) { | |
699 | length += meta_len; | |
700 | meta_len = 0; | |
701 | } else if (meta_len) { | |
702 | if ((io.metadata & 3) || !io.metadata) | |
703 | return -EINVAL; | |
704 | } | |
705 | ||
706 | memset(&c, 0, sizeof(c)); | |
707 | c.rw.opcode = io.opcode; | |
708 | c.rw.flags = io.flags; | |
709 | c.rw.nsid = cpu_to_le32(ns->ns_id); | |
710 | c.rw.slba = cpu_to_le64(io.slba); | |
711 | c.rw.length = cpu_to_le16(io.nblocks); | |
712 | c.rw.control = cpu_to_le16(io.control); | |
713 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); | |
714 | c.rw.reftag = cpu_to_le32(io.reftag); | |
715 | c.rw.apptag = cpu_to_le16(io.apptag); | |
716 | c.rw.appmask = cpu_to_le16(io.appmask); | |
717 | ||
718 | return __nvme_submit_user_cmd(ns->queue, &c, | |
719 | (void __user *)(uintptr_t)io.addr, length, | |
720 | metadata, meta_len, io.slba, NULL, 0); | |
721 | } | |
722 | ||
f3ca80fc | 723 | static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
1673f1f0 CH |
724 | struct nvme_passthru_cmd __user *ucmd) |
725 | { | |
726 | struct nvme_passthru_cmd cmd; | |
727 | struct nvme_command c; | |
728 | unsigned timeout = 0; | |
729 | int status; | |
730 | ||
731 | if (!capable(CAP_SYS_ADMIN)) | |
732 | return -EACCES; | |
733 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) | |
734 | return -EFAULT; | |
63088ec7 KB |
735 | if (cmd.flags) |
736 | return -EINVAL; | |
1673f1f0 CH |
737 | |
738 | memset(&c, 0, sizeof(c)); | |
739 | c.common.opcode = cmd.opcode; | |
740 | c.common.flags = cmd.flags; | |
741 | c.common.nsid = cpu_to_le32(cmd.nsid); | |
742 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); | |
743 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); | |
744 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); | |
745 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); | |
746 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); | |
747 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); | |
748 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); | |
749 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); | |
750 | ||
751 | if (cmd.timeout_ms) | |
752 | timeout = msecs_to_jiffies(cmd.timeout_ms); | |
753 | ||
754 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, | |
d1ea7be5 | 755 | (void __user *)(uintptr_t)cmd.addr, cmd.data_len, |
1673f1f0 CH |
756 | &cmd.result, timeout); |
757 | if (status >= 0) { | |
758 | if (put_user(cmd.result, &ucmd->result)) | |
759 | return -EFAULT; | |
760 | } | |
761 | ||
762 | return status; | |
763 | } | |
764 | ||
765 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, | |
766 | unsigned int cmd, unsigned long arg) | |
767 | { | |
768 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
769 | ||
770 | switch (cmd) { | |
771 | case NVME_IOCTL_ID: | |
772 | force_successful_syscall_return(); | |
773 | return ns->ns_id; | |
774 | case NVME_IOCTL_ADMIN_CMD: | |
775 | return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg); | |
776 | case NVME_IOCTL_IO_CMD: | |
777 | return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); | |
778 | case NVME_IOCTL_SUBMIT_IO: | |
779 | return nvme_submit_io(ns, (void __user *)arg); | |
44907332 | 780 | #ifdef CONFIG_BLK_DEV_NVME_SCSI |
1673f1f0 CH |
781 | case SG_GET_VERSION_NUM: |
782 | return nvme_sg_get_version_num((void __user *)arg); | |
783 | case SG_IO: | |
784 | return nvme_sg_io(ns, (void __user *)arg); | |
44907332 | 785 | #endif |
1673f1f0 CH |
786 | default: |
787 | return -ENOTTY; | |
788 | } | |
789 | } | |
790 | ||
791 | #ifdef CONFIG_COMPAT | |
792 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
793 | unsigned int cmd, unsigned long arg) | |
794 | { | |
795 | switch (cmd) { | |
796 | case SG_IO: | |
797 | return -ENOIOCTLCMD; | |
798 | } | |
799 | return nvme_ioctl(bdev, mode, cmd, arg); | |
800 | } | |
801 | #else | |
802 | #define nvme_compat_ioctl NULL | |
803 | #endif | |
804 | ||
805 | static int nvme_open(struct block_device *bdev, fmode_t mode) | |
806 | { | |
807 | return nvme_get_ns_from_disk(bdev->bd_disk) ? 0 : -ENXIO; | |
808 | } | |
809 | ||
810 | static void nvme_release(struct gendisk *disk, fmode_t mode) | |
811 | { | |
e439bb12 SG |
812 | struct nvme_ns *ns = disk->private_data; |
813 | ||
814 | module_put(ns->ctrl->ops->module); | |
815 | nvme_put_ns(ns); | |
1673f1f0 CH |
816 | } |
817 | ||
818 | static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
819 | { | |
820 | /* some standard values */ | |
821 | geo->heads = 1 << 6; | |
822 | geo->sectors = 1 << 5; | |
823 | geo->cylinders = get_capacity(bdev->bd_disk) >> 11; | |
824 | return 0; | |
825 | } | |
826 | ||
827 | #ifdef CONFIG_BLK_DEV_INTEGRITY | |
828 | static void nvme_init_integrity(struct nvme_ns *ns) | |
829 | { | |
830 | struct blk_integrity integrity; | |
831 | ||
fa9a89fc | 832 | memset(&integrity, 0, sizeof(integrity)); |
1673f1f0 CH |
833 | switch (ns->pi_type) { |
834 | case NVME_NS_DPS_PI_TYPE3: | |
835 | integrity.profile = &t10_pi_type3_crc; | |
ba36c21b NB |
836 | integrity.tag_size = sizeof(u16) + sizeof(u32); |
837 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; | |
1673f1f0 CH |
838 | break; |
839 | case NVME_NS_DPS_PI_TYPE1: | |
840 | case NVME_NS_DPS_PI_TYPE2: | |
841 | integrity.profile = &t10_pi_type1_crc; | |
ba36c21b NB |
842 | integrity.tag_size = sizeof(u16); |
843 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; | |
1673f1f0 CH |
844 | break; |
845 | default: | |
846 | integrity.profile = NULL; | |
847 | break; | |
848 | } | |
849 | integrity.tuple_size = ns->ms; | |
850 | blk_integrity_register(ns->disk, &integrity); | |
851 | blk_queue_max_integrity_segments(ns->queue, 1); | |
852 | } | |
853 | #else | |
854 | static void nvme_init_integrity(struct nvme_ns *ns) | |
855 | { | |
856 | } | |
857 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
858 | ||
859 | static void nvme_config_discard(struct nvme_ns *ns) | |
860 | { | |
08095e70 | 861 | struct nvme_ctrl *ctrl = ns->ctrl; |
1673f1f0 | 862 | u32 logical_block_size = queue_logical_block_size(ns->queue); |
08095e70 KB |
863 | |
864 | if (ctrl->quirks & NVME_QUIRK_DISCARD_ZEROES) | |
865 | ns->queue->limits.discard_zeroes_data = 1; | |
866 | else | |
867 | ns->queue->limits.discard_zeroes_data = 0; | |
868 | ||
1673f1f0 CH |
869 | ns->queue->limits.discard_alignment = logical_block_size; |
870 | ns->queue->limits.discard_granularity = logical_block_size; | |
bd0fc288 | 871 | blk_queue_max_discard_sectors(ns->queue, UINT_MAX); |
1673f1f0 CH |
872 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); |
873 | } | |
874 | ||
ac81bfa9 | 875 | static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id) |
1673f1f0 | 876 | { |
ac81bfa9 | 877 | if (nvme_identify_ns(ns->ctrl, ns->ns_id, id)) { |
b0b4e09c | 878 | dev_warn(ns->ctrl->dev, "%s: Identify failure\n", __func__); |
1673f1f0 CH |
879 | return -ENODEV; |
880 | } | |
1673f1f0 | 881 | |
ac81bfa9 MB |
882 | if ((*id)->ncap == 0) { |
883 | kfree(*id); | |
884 | return -ENODEV; | |
1673f1f0 CH |
885 | } |
886 | ||
8ef2074d | 887 | if (ns->ctrl->vs >= NVME_VS(1, 1, 0)) |
ac81bfa9 | 888 | memcpy(ns->eui, (*id)->eui64, sizeof(ns->eui)); |
8ef2074d | 889 | if (ns->ctrl->vs >= NVME_VS(1, 2, 0)) |
ac81bfa9 MB |
890 | memcpy(ns->uuid, (*id)->nguid, sizeof(ns->uuid)); |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) | |
896 | { | |
897 | struct nvme_ns *ns = disk->private_data; | |
898 | u8 lbaf, pi_type; | |
899 | u16 old_ms; | |
900 | unsigned short bs; | |
2b9b6e86 | 901 | |
1673f1f0 CH |
902 | old_ms = ns->ms; |
903 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; | |
904 | ns->lba_shift = id->lbaf[lbaf].ds; | |
905 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); | |
906 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); | |
907 | ||
908 | /* | |
909 | * If identify namespace failed, use default 512 byte block size so | |
910 | * block layer can use before failing read/write for 0 capacity. | |
911 | */ | |
912 | if (ns->lba_shift == 0) | |
913 | ns->lba_shift = 9; | |
914 | bs = 1 << ns->lba_shift; | |
1673f1f0 CH |
915 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ |
916 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? | |
917 | id->dps & NVME_NS_DPS_PI_MASK : 0; | |
918 | ||
919 | blk_mq_freeze_queue(disk->queue); | |
920 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || | |
921 | ns->ms != old_ms || | |
922 | bs != queue_logical_block_size(disk->queue) || | |
923 | (ns->ms && ns->ext))) | |
924 | blk_integrity_unregister(disk); | |
925 | ||
926 | ns->pi_type = pi_type; | |
927 | blk_queue_logical_block_size(ns->queue, bs); | |
928 | ||
4b9d5b15 | 929 | if (ns->ms && !blk_get_integrity(disk) && !ns->ext) |
1673f1f0 | 930 | nvme_init_integrity(ns); |
1673f1f0 CH |
931 | if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk)) |
932 | set_capacity(disk, 0); | |
933 | else | |
934 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); | |
935 | ||
936 | if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) | |
937 | nvme_config_discard(ns); | |
938 | blk_mq_unfreeze_queue(disk->queue); | |
ac81bfa9 | 939 | } |
1673f1f0 | 940 | |
ac81bfa9 MB |
941 | static int nvme_revalidate_disk(struct gendisk *disk) |
942 | { | |
943 | struct nvme_ns *ns = disk->private_data; | |
944 | struct nvme_id_ns *id = NULL; | |
945 | int ret; | |
946 | ||
947 | if (test_bit(NVME_NS_DEAD, &ns->flags)) { | |
948 | set_capacity(disk, 0); | |
949 | return -ENODEV; | |
950 | } | |
951 | ||
952 | ret = nvme_revalidate_ns(ns, &id); | |
953 | if (ret) | |
954 | return ret; | |
955 | ||
956 | __nvme_revalidate_disk(disk, id); | |
1673f1f0 | 957 | kfree(id); |
ac81bfa9 | 958 | |
1673f1f0 CH |
959 | return 0; |
960 | } | |
961 | ||
962 | static char nvme_pr_type(enum pr_type type) | |
963 | { | |
964 | switch (type) { | |
965 | case PR_WRITE_EXCLUSIVE: | |
966 | return 1; | |
967 | case PR_EXCLUSIVE_ACCESS: | |
968 | return 2; | |
969 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
970 | return 3; | |
971 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
972 | return 4; | |
973 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
974 | return 5; | |
975 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
976 | return 6; | |
977 | default: | |
978 | return 0; | |
979 | } | |
980 | }; | |
981 | ||
982 | static int nvme_pr_command(struct block_device *bdev, u32 cdw10, | |
983 | u64 key, u64 sa_key, u8 op) | |
984 | { | |
985 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
986 | struct nvme_command c; | |
987 | u8 data[16] = { 0, }; | |
988 | ||
989 | put_unaligned_le64(key, &data[0]); | |
990 | put_unaligned_le64(sa_key, &data[8]); | |
991 | ||
992 | memset(&c, 0, sizeof(c)); | |
993 | c.common.opcode = op; | |
994 | c.common.nsid = cpu_to_le32(ns->ns_id); | |
995 | c.common.cdw10[0] = cpu_to_le32(cdw10); | |
996 | ||
997 | return nvme_submit_sync_cmd(ns->queue, &c, data, 16); | |
998 | } | |
999 | ||
1000 | static int nvme_pr_register(struct block_device *bdev, u64 old, | |
1001 | u64 new, unsigned flags) | |
1002 | { | |
1003 | u32 cdw10; | |
1004 | ||
1005 | if (flags & ~PR_FL_IGNORE_KEY) | |
1006 | return -EOPNOTSUPP; | |
1007 | ||
1008 | cdw10 = old ? 2 : 0; | |
1009 | cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; | |
1010 | cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ | |
1011 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); | |
1012 | } | |
1013 | ||
1014 | static int nvme_pr_reserve(struct block_device *bdev, u64 key, | |
1015 | enum pr_type type, unsigned flags) | |
1016 | { | |
1017 | u32 cdw10; | |
1018 | ||
1019 | if (flags & ~PR_FL_IGNORE_KEY) | |
1020 | return -EOPNOTSUPP; | |
1021 | ||
1022 | cdw10 = nvme_pr_type(type) << 8; | |
1023 | cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); | |
1024 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); | |
1025 | } | |
1026 | ||
1027 | static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, | |
1028 | enum pr_type type, bool abort) | |
1029 | { | |
1030 | u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; | |
1031 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); | |
1032 | } | |
1033 | ||
1034 | static int nvme_pr_clear(struct block_device *bdev, u64 key) | |
1035 | { | |
8c0b3915 | 1036 | u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
1673f1f0 CH |
1037 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
1038 | } | |
1039 | ||
1040 | static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1041 | { | |
1042 | u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; | |
1043 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); | |
1044 | } | |
1045 | ||
1046 | static const struct pr_ops nvme_pr_ops = { | |
1047 | .pr_register = nvme_pr_register, | |
1048 | .pr_reserve = nvme_pr_reserve, | |
1049 | .pr_release = nvme_pr_release, | |
1050 | .pr_preempt = nvme_pr_preempt, | |
1051 | .pr_clear = nvme_pr_clear, | |
1052 | }; | |
1053 | ||
5bae7f73 | 1054 | static const struct block_device_operations nvme_fops = { |
1673f1f0 CH |
1055 | .owner = THIS_MODULE, |
1056 | .ioctl = nvme_ioctl, | |
1057 | .compat_ioctl = nvme_compat_ioctl, | |
1058 | .open = nvme_open, | |
1059 | .release = nvme_release, | |
1060 | .getgeo = nvme_getgeo, | |
1061 | .revalidate_disk= nvme_revalidate_disk, | |
1062 | .pr_ops = &nvme_pr_ops, | |
1063 | }; | |
1064 | ||
5fd4ce1b CH |
1065 | static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
1066 | { | |
1067 | unsigned long timeout = | |
1068 | ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; | |
1069 | u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; | |
1070 | int ret; | |
1071 | ||
1072 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
0df1e4f5 KB |
1073 | if (csts == ~0) |
1074 | return -ENODEV; | |
5fd4ce1b CH |
1075 | if ((csts & NVME_CSTS_RDY) == bit) |
1076 | break; | |
1077 | ||
1078 | msleep(100); | |
1079 | if (fatal_signal_pending(current)) | |
1080 | return -EINTR; | |
1081 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 1082 | dev_err(ctrl->device, |
5fd4ce1b CH |
1083 | "Device not ready; aborting %s\n", enabled ? |
1084 | "initialisation" : "reset"); | |
1085 | return -ENODEV; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | return ret; | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * If the device has been passed off to us in an enabled state, just clear | |
1094 | * the enabled bit. The spec says we should set the 'shutdown notification | |
1095 | * bits', but doing so may cause the device to complete commands to the | |
1096 | * admin queue ... and we don't know what memory that might be pointing at! | |
1097 | */ | |
1098 | int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
1099 | { | |
1100 | int ret; | |
1101 | ||
1102 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
1103 | ctrl->ctrl_config &= ~NVME_CC_ENABLE; | |
1104 | ||
1105 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1106 | if (ret) | |
1107 | return ret; | |
54adc010 GP |
1108 | |
1109 | /* Checking for ctrl->tagset is a trick to avoid sleeping on module | |
1110 | * load, since we only need the quirk on reset_controller. Notice | |
1111 | * that the HGST device needs this delay only in firmware activation | |
1112 | * procedure; unfortunately we have no (easy) way to verify this. | |
1113 | */ | |
1114 | if ((ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) && ctrl->tagset) | |
1115 | msleep(NVME_QUIRK_DELAY_AMOUNT); | |
1116 | ||
5fd4ce1b CH |
1117 | return nvme_wait_ready(ctrl, cap, false); |
1118 | } | |
576d55d6 | 1119 | EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
5fd4ce1b CH |
1120 | |
1121 | int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
1122 | { | |
1123 | /* | |
1124 | * Default to a 4K page size, with the intention to update this | |
1125 | * path in the future to accomodate architectures with differing | |
1126 | * kernel and IO page sizes. | |
1127 | */ | |
1128 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12; | |
1129 | int ret; | |
1130 | ||
1131 | if (page_shift < dev_page_min) { | |
1b3c47c1 | 1132 | dev_err(ctrl->device, |
5fd4ce1b CH |
1133 | "Minimum device page size %u too large for host (%u)\n", |
1134 | 1 << dev_page_min, 1 << page_shift); | |
1135 | return -ENODEV; | |
1136 | } | |
1137 | ||
1138 | ctrl->page_size = 1 << page_shift; | |
1139 | ||
1140 | ctrl->ctrl_config = NVME_CC_CSS_NVM; | |
1141 | ctrl->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; | |
1142 | ctrl->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; | |
1143 | ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; | |
1144 | ctrl->ctrl_config |= NVME_CC_ENABLE; | |
1145 | ||
1146 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1147 | if (ret) | |
1148 | return ret; | |
1149 | return nvme_wait_ready(ctrl, cap, true); | |
1150 | } | |
576d55d6 | 1151 | EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
5fd4ce1b CH |
1152 | |
1153 | int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) | |
1154 | { | |
1155 | unsigned long timeout = SHUTDOWN_TIMEOUT + jiffies; | |
1156 | u32 csts; | |
1157 | int ret; | |
1158 | ||
1159 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
1160 | ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; | |
1161 | ||
1162 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
1163 | if (ret) | |
1164 | return ret; | |
1165 | ||
1166 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
1167 | if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) | |
1168 | break; | |
1169 | ||
1170 | msleep(100); | |
1171 | if (fatal_signal_pending(current)) | |
1172 | return -EINTR; | |
1173 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 1174 | dev_err(ctrl->device, |
5fd4ce1b CH |
1175 | "Device shutdown incomplete; abort shutdown\n"); |
1176 | return -ENODEV; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | return ret; | |
1181 | } | |
576d55d6 | 1182 | EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
5fd4ce1b | 1183 | |
da35825d CH |
1184 | static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
1185 | struct request_queue *q) | |
1186 | { | |
7c88cb00 JA |
1187 | bool vwc = false; |
1188 | ||
da35825d | 1189 | if (ctrl->max_hw_sectors) { |
45686b61 CH |
1190 | u32 max_segments = |
1191 | (ctrl->max_hw_sectors / (ctrl->page_size >> 9)) + 1; | |
1192 | ||
da35825d | 1193 | blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
45686b61 | 1194 | blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
da35825d | 1195 | } |
e6282aef KB |
1196 | if (ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) |
1197 | blk_queue_chunk_sectors(q, ctrl->max_hw_sectors); | |
da35825d | 1198 | blk_queue_virt_boundary(q, ctrl->page_size - 1); |
7c88cb00 JA |
1199 | if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) |
1200 | vwc = true; | |
1201 | blk_queue_write_cache(q, vwc, vwc); | |
da35825d CH |
1202 | } |
1203 | ||
7fd8930f CH |
1204 | /* |
1205 | * Initialize the cached copies of the Identify data and various controller | |
1206 | * register in our nvme_ctrl structure. This should be called as soon as | |
1207 | * the admin queue is fully up and running. | |
1208 | */ | |
1209 | int nvme_init_identify(struct nvme_ctrl *ctrl) | |
1210 | { | |
1211 | struct nvme_id_ctrl *id; | |
1212 | u64 cap; | |
1213 | int ret, page_shift; | |
a229dbf6 | 1214 | u32 max_hw_sectors; |
7fd8930f | 1215 | |
f3ca80fc CH |
1216 | ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
1217 | if (ret) { | |
1b3c47c1 | 1218 | dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
f3ca80fc CH |
1219 | return ret; |
1220 | } | |
1221 | ||
7fd8930f CH |
1222 | ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &cap); |
1223 | if (ret) { | |
1b3c47c1 | 1224 | dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
7fd8930f CH |
1225 | return ret; |
1226 | } | |
1227 | page_shift = NVME_CAP_MPSMIN(cap) + 12; | |
1228 | ||
8ef2074d | 1229 | if (ctrl->vs >= NVME_VS(1, 1, 0)) |
f3ca80fc CH |
1230 | ctrl->subsystem = NVME_CAP_NSSRC(cap); |
1231 | ||
7fd8930f CH |
1232 | ret = nvme_identify_ctrl(ctrl, &id); |
1233 | if (ret) { | |
1b3c47c1 | 1234 | dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
7fd8930f CH |
1235 | return -EIO; |
1236 | } | |
1237 | ||
118472ab | 1238 | ctrl->vid = le16_to_cpu(id->vid); |
7fd8930f | 1239 | ctrl->oncs = le16_to_cpup(&id->oncs); |
6bf25d16 | 1240 | atomic_set(&ctrl->abort_limit, id->acl + 1); |
7fd8930f | 1241 | ctrl->vwc = id->vwc; |
931e1c22 | 1242 | ctrl->cntlid = le16_to_cpup(&id->cntlid); |
7fd8930f CH |
1243 | memcpy(ctrl->serial, id->sn, sizeof(id->sn)); |
1244 | memcpy(ctrl->model, id->mn, sizeof(id->mn)); | |
1245 | memcpy(ctrl->firmware_rev, id->fr, sizeof(id->fr)); | |
1246 | if (id->mdts) | |
a229dbf6 | 1247 | max_hw_sectors = 1 << (id->mdts + page_shift - 9); |
7fd8930f | 1248 | else |
a229dbf6 CH |
1249 | max_hw_sectors = UINT_MAX; |
1250 | ctrl->max_hw_sectors = | |
1251 | min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); | |
7fd8930f | 1252 | |
da35825d | 1253 | nvme_set_queue_limits(ctrl, ctrl->admin_q); |
07bfcd09 | 1254 | ctrl->sgls = le32_to_cpu(id->sgls); |
038bd4cb | 1255 | ctrl->kas = le16_to_cpu(id->kas); |
07bfcd09 CH |
1256 | |
1257 | if (ctrl->ops->is_fabrics) { | |
1258 | ctrl->icdoff = le16_to_cpu(id->icdoff); | |
1259 | ctrl->ioccsz = le32_to_cpu(id->ioccsz); | |
1260 | ctrl->iorcsz = le32_to_cpu(id->iorcsz); | |
1261 | ctrl->maxcmd = le16_to_cpu(id->maxcmd); | |
1262 | ||
1263 | /* | |
1264 | * In fabrics we need to verify the cntlid matches the | |
1265 | * admin connect | |
1266 | */ | |
1267 | if (ctrl->cntlid != le16_to_cpu(id->cntlid)) | |
1268 | ret = -EINVAL; | |
038bd4cb SG |
1269 | |
1270 | if (!ctrl->opts->discovery_nqn && !ctrl->kas) { | |
1271 | dev_err(ctrl->dev, | |
1272 | "keep-alive support is mandatory for fabrics\n"); | |
1273 | ret = -EINVAL; | |
1274 | } | |
07bfcd09 CH |
1275 | } else { |
1276 | ctrl->cntlid = le16_to_cpu(id->cntlid); | |
1277 | } | |
da35825d | 1278 | |
7fd8930f | 1279 | kfree(id); |
07bfcd09 | 1280 | return ret; |
7fd8930f | 1281 | } |
576d55d6 | 1282 | EXPORT_SYMBOL_GPL(nvme_init_identify); |
7fd8930f | 1283 | |
f3ca80fc | 1284 | static int nvme_dev_open(struct inode *inode, struct file *file) |
1673f1f0 | 1285 | { |
f3ca80fc CH |
1286 | struct nvme_ctrl *ctrl; |
1287 | int instance = iminor(inode); | |
1288 | int ret = -ENODEV; | |
1673f1f0 | 1289 | |
f3ca80fc CH |
1290 | spin_lock(&dev_list_lock); |
1291 | list_for_each_entry(ctrl, &nvme_ctrl_list, node) { | |
1292 | if (ctrl->instance != instance) | |
1293 | continue; | |
1294 | ||
1295 | if (!ctrl->admin_q) { | |
1296 | ret = -EWOULDBLOCK; | |
1297 | break; | |
1298 | } | |
1299 | if (!kref_get_unless_zero(&ctrl->kref)) | |
1300 | break; | |
1301 | file->private_data = ctrl; | |
1302 | ret = 0; | |
1303 | break; | |
1304 | } | |
1305 | spin_unlock(&dev_list_lock); | |
1306 | ||
1307 | return ret; | |
1673f1f0 CH |
1308 | } |
1309 | ||
f3ca80fc | 1310 | static int nvme_dev_release(struct inode *inode, struct file *file) |
1673f1f0 | 1311 | { |
f3ca80fc CH |
1312 | nvme_put_ctrl(file->private_data); |
1313 | return 0; | |
1314 | } | |
1315 | ||
bfd89471 CH |
1316 | static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
1317 | { | |
1318 | struct nvme_ns *ns; | |
1319 | int ret; | |
1320 | ||
1321 | mutex_lock(&ctrl->namespaces_mutex); | |
1322 | if (list_empty(&ctrl->namespaces)) { | |
1323 | ret = -ENOTTY; | |
1324 | goto out_unlock; | |
1325 | } | |
1326 | ||
1327 | ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); | |
1328 | if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { | |
1b3c47c1 | 1329 | dev_warn(ctrl->device, |
bfd89471 CH |
1330 | "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
1331 | ret = -EINVAL; | |
1332 | goto out_unlock; | |
1333 | } | |
1334 | ||
1b3c47c1 | 1335 | dev_warn(ctrl->device, |
bfd89471 CH |
1336 | "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
1337 | kref_get(&ns->kref); | |
1338 | mutex_unlock(&ctrl->namespaces_mutex); | |
1339 | ||
1340 | ret = nvme_user_cmd(ctrl, ns, argp); | |
1341 | nvme_put_ns(ns); | |
1342 | return ret; | |
1343 | ||
1344 | out_unlock: | |
1345 | mutex_unlock(&ctrl->namespaces_mutex); | |
1346 | return ret; | |
1347 | } | |
1348 | ||
f3ca80fc CH |
1349 | static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
1350 | unsigned long arg) | |
1351 | { | |
1352 | struct nvme_ctrl *ctrl = file->private_data; | |
1353 | void __user *argp = (void __user *)arg; | |
f3ca80fc CH |
1354 | |
1355 | switch (cmd) { | |
1356 | case NVME_IOCTL_ADMIN_CMD: | |
1357 | return nvme_user_cmd(ctrl, NULL, argp); | |
1358 | case NVME_IOCTL_IO_CMD: | |
bfd89471 | 1359 | return nvme_dev_user_cmd(ctrl, argp); |
f3ca80fc | 1360 | case NVME_IOCTL_RESET: |
1b3c47c1 | 1361 | dev_warn(ctrl->device, "resetting controller\n"); |
f3ca80fc CH |
1362 | return ctrl->ops->reset_ctrl(ctrl); |
1363 | case NVME_IOCTL_SUBSYS_RESET: | |
1364 | return nvme_reset_subsystem(ctrl); | |
9ec3bb2f KB |
1365 | case NVME_IOCTL_RESCAN: |
1366 | nvme_queue_scan(ctrl); | |
1367 | return 0; | |
f3ca80fc CH |
1368 | default: |
1369 | return -ENOTTY; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | static const struct file_operations nvme_dev_fops = { | |
1374 | .owner = THIS_MODULE, | |
1375 | .open = nvme_dev_open, | |
1376 | .release = nvme_dev_release, | |
1377 | .unlocked_ioctl = nvme_dev_ioctl, | |
1378 | .compat_ioctl = nvme_dev_ioctl, | |
1379 | }; | |
1380 | ||
1381 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
1382 | struct device_attribute *attr, const char *buf, | |
1383 | size_t count) | |
1384 | { | |
1385 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1386 | int ret; | |
1387 | ||
1388 | ret = ctrl->ops->reset_ctrl(ctrl); | |
1389 | if (ret < 0) | |
1390 | return ret; | |
1391 | return count; | |
1673f1f0 | 1392 | } |
f3ca80fc | 1393 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
1673f1f0 | 1394 | |
9ec3bb2f KB |
1395 | static ssize_t nvme_sysfs_rescan(struct device *dev, |
1396 | struct device_attribute *attr, const char *buf, | |
1397 | size_t count) | |
1398 | { | |
1399 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1400 | ||
1401 | nvme_queue_scan(ctrl); | |
1402 | return count; | |
1403 | } | |
1404 | static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); | |
1405 | ||
118472ab KB |
1406 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
1407 | char *buf) | |
1408 | { | |
40267efd | 1409 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
118472ab KB |
1410 | struct nvme_ctrl *ctrl = ns->ctrl; |
1411 | int serial_len = sizeof(ctrl->serial); | |
1412 | int model_len = sizeof(ctrl->model); | |
1413 | ||
1414 | if (memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1415 | return sprintf(buf, "eui.%16phN\n", ns->uuid); | |
1416 | ||
1417 | if (memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1418 | return sprintf(buf, "eui.%8phN\n", ns->eui); | |
1419 | ||
1420 | while (ctrl->serial[serial_len - 1] == ' ') | |
1421 | serial_len--; | |
1422 | while (ctrl->model[model_len - 1] == ' ') | |
1423 | model_len--; | |
1424 | ||
1425 | return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", ctrl->vid, | |
1426 | serial_len, ctrl->serial, model_len, ctrl->model, ns->ns_id); | |
1427 | } | |
1428 | static DEVICE_ATTR(wwid, S_IRUGO, wwid_show, NULL); | |
1429 | ||
2b9b6e86 KB |
1430 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
1431 | char *buf) | |
1432 | { | |
40267efd | 1433 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1434 | return sprintf(buf, "%pU\n", ns->uuid); |
1435 | } | |
1436 | static DEVICE_ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
1437 | ||
1438 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, | |
1439 | char *buf) | |
1440 | { | |
40267efd | 1441 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1442 | return sprintf(buf, "%8phd\n", ns->eui); |
1443 | } | |
1444 | static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL); | |
1445 | ||
1446 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, | |
1447 | char *buf) | |
1448 | { | |
40267efd | 1449 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1450 | return sprintf(buf, "%d\n", ns->ns_id); |
1451 | } | |
1452 | static DEVICE_ATTR(nsid, S_IRUGO, nsid_show, NULL); | |
1453 | ||
1454 | static struct attribute *nvme_ns_attrs[] = { | |
118472ab | 1455 | &dev_attr_wwid.attr, |
2b9b6e86 KB |
1456 | &dev_attr_uuid.attr, |
1457 | &dev_attr_eui.attr, | |
1458 | &dev_attr_nsid.attr, | |
1459 | NULL, | |
1460 | }; | |
1461 | ||
1a353d85 | 1462 | static umode_t nvme_ns_attrs_are_visible(struct kobject *kobj, |
2b9b6e86 KB |
1463 | struct attribute *a, int n) |
1464 | { | |
1465 | struct device *dev = container_of(kobj, struct device, kobj); | |
40267efd | 1466 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
2b9b6e86 KB |
1467 | |
1468 | if (a == &dev_attr_uuid.attr) { | |
1469 | if (!memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1470 | return 0; | |
1471 | } | |
1472 | if (a == &dev_attr_eui.attr) { | |
1473 | if (!memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1474 | return 0; | |
1475 | } | |
1476 | return a->mode; | |
1477 | } | |
1478 | ||
1479 | static const struct attribute_group nvme_ns_attr_group = { | |
1480 | .attrs = nvme_ns_attrs, | |
1a353d85 | 1481 | .is_visible = nvme_ns_attrs_are_visible, |
2b9b6e86 KB |
1482 | }; |
1483 | ||
931e1c22 | 1484 | #define nvme_show_str_function(field) \ |
779ff756 KB |
1485 | static ssize_t field##_show(struct device *dev, \ |
1486 | struct device_attribute *attr, char *buf) \ | |
1487 | { \ | |
1488 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1489 | return sprintf(buf, "%.*s\n", (int)sizeof(ctrl->field), ctrl->field); \ | |
1490 | } \ | |
1491 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1492 | ||
931e1c22 ML |
1493 | #define nvme_show_int_function(field) \ |
1494 | static ssize_t field##_show(struct device *dev, \ | |
1495 | struct device_attribute *attr, char *buf) \ | |
1496 | { \ | |
1497 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1498 | return sprintf(buf, "%d\n", ctrl->field); \ | |
1499 | } \ | |
1500 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1501 | ||
1502 | nvme_show_str_function(model); | |
1503 | nvme_show_str_function(serial); | |
1504 | nvme_show_str_function(firmware_rev); | |
1505 | nvme_show_int_function(cntlid); | |
779ff756 | 1506 | |
1a353d85 ML |
1507 | static ssize_t nvme_sysfs_delete(struct device *dev, |
1508 | struct device_attribute *attr, const char *buf, | |
1509 | size_t count) | |
1510 | { | |
1511 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1512 | ||
1513 | if (device_remove_file_self(dev, attr)) | |
1514 | ctrl->ops->delete_ctrl(ctrl); | |
1515 | return count; | |
1516 | } | |
1517 | static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); | |
1518 | ||
1519 | static ssize_t nvme_sysfs_show_transport(struct device *dev, | |
1520 | struct device_attribute *attr, | |
1521 | char *buf) | |
1522 | { | |
1523 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1524 | ||
1525 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); | |
1526 | } | |
1527 | static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); | |
1528 | ||
1529 | static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, | |
1530 | struct device_attribute *attr, | |
1531 | char *buf) | |
1532 | { | |
1533 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1534 | ||
1535 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
1536 | ctrl->ops->get_subsysnqn(ctrl)); | |
1537 | } | |
1538 | static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); | |
1539 | ||
1540 | static ssize_t nvme_sysfs_show_address(struct device *dev, | |
1541 | struct device_attribute *attr, | |
1542 | char *buf) | |
1543 | { | |
1544 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1545 | ||
1546 | return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); | |
1547 | } | |
1548 | static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); | |
1549 | ||
779ff756 KB |
1550 | static struct attribute *nvme_dev_attrs[] = { |
1551 | &dev_attr_reset_controller.attr, | |
9ec3bb2f | 1552 | &dev_attr_rescan_controller.attr, |
779ff756 KB |
1553 | &dev_attr_model.attr, |
1554 | &dev_attr_serial.attr, | |
1555 | &dev_attr_firmware_rev.attr, | |
931e1c22 | 1556 | &dev_attr_cntlid.attr, |
1a353d85 ML |
1557 | &dev_attr_delete_controller.attr, |
1558 | &dev_attr_transport.attr, | |
1559 | &dev_attr_subsysnqn.attr, | |
1560 | &dev_attr_address.attr, | |
779ff756 KB |
1561 | NULL |
1562 | }; | |
1563 | ||
1a353d85 ML |
1564 | #define CHECK_ATTR(ctrl, a, name) \ |
1565 | if ((a) == &dev_attr_##name.attr && \ | |
1566 | !(ctrl)->ops->get_##name) \ | |
1567 | return 0 | |
1568 | ||
1569 | static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, | |
1570 | struct attribute *a, int n) | |
1571 | { | |
1572 | struct device *dev = container_of(kobj, struct device, kobj); | |
1573 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1574 | ||
1575 | if (a == &dev_attr_delete_controller.attr) { | |
1576 | if (!ctrl->ops->delete_ctrl) | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | CHECK_ATTR(ctrl, a, subsysnqn); | |
1581 | CHECK_ATTR(ctrl, a, address); | |
1582 | ||
1583 | return a->mode; | |
1584 | } | |
1585 | ||
779ff756 | 1586 | static struct attribute_group nvme_dev_attrs_group = { |
1a353d85 ML |
1587 | .attrs = nvme_dev_attrs, |
1588 | .is_visible = nvme_dev_attrs_are_visible, | |
779ff756 KB |
1589 | }; |
1590 | ||
1591 | static const struct attribute_group *nvme_dev_attr_groups[] = { | |
1592 | &nvme_dev_attrs_group, | |
1593 | NULL, | |
1594 | }; | |
1595 | ||
5bae7f73 CH |
1596 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
1597 | { | |
1598 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); | |
1599 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); | |
1600 | ||
1601 | return nsa->ns_id - nsb->ns_id; | |
1602 | } | |
1603 | ||
32f0c4af | 1604 | static struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
5bae7f73 | 1605 | { |
32f0c4af | 1606 | struct nvme_ns *ns, *ret = NULL; |
69d3b8ac | 1607 | |
32f0c4af | 1608 | mutex_lock(&ctrl->namespaces_mutex); |
5bae7f73 | 1609 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
32f0c4af KB |
1610 | if (ns->ns_id == nsid) { |
1611 | kref_get(&ns->kref); | |
1612 | ret = ns; | |
1613 | break; | |
1614 | } | |
5bae7f73 CH |
1615 | if (ns->ns_id > nsid) |
1616 | break; | |
1617 | } | |
32f0c4af KB |
1618 | mutex_unlock(&ctrl->namespaces_mutex); |
1619 | return ret; | |
5bae7f73 CH |
1620 | } |
1621 | ||
1622 | static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) | |
1623 | { | |
1624 | struct nvme_ns *ns; | |
1625 | struct gendisk *disk; | |
ac81bfa9 MB |
1626 | struct nvme_id_ns *id; |
1627 | char disk_name[DISK_NAME_LEN]; | |
5bae7f73 CH |
1628 | int node = dev_to_node(ctrl->dev); |
1629 | ||
1630 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); | |
1631 | if (!ns) | |
1632 | return; | |
1633 | ||
075790eb KB |
1634 | ns->instance = ida_simple_get(&ctrl->ns_ida, 1, 0, GFP_KERNEL); |
1635 | if (ns->instance < 0) | |
1636 | goto out_free_ns; | |
1637 | ||
5bae7f73 CH |
1638 | ns->queue = blk_mq_init_queue(ctrl->tagset); |
1639 | if (IS_ERR(ns->queue)) | |
075790eb | 1640 | goto out_release_instance; |
5bae7f73 CH |
1641 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); |
1642 | ns->queue->queuedata = ns; | |
1643 | ns->ctrl = ctrl; | |
1644 | ||
5bae7f73 CH |
1645 | kref_init(&ns->kref); |
1646 | ns->ns_id = nsid; | |
5bae7f73 | 1647 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
5bae7f73 CH |
1648 | |
1649 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); | |
da35825d | 1650 | nvme_set_queue_limits(ctrl, ns->queue); |
5bae7f73 | 1651 | |
ac81bfa9 | 1652 | sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance); |
5bae7f73 | 1653 | |
ac81bfa9 MB |
1654 | if (nvme_revalidate_ns(ns, &id)) |
1655 | goto out_free_queue; | |
1656 | ||
3dc87dd0 MB |
1657 | if (nvme_nvm_ns_supported(ns, id) && |
1658 | nvme_nvm_register(ns, disk_name, node)) { | |
1659 | dev_warn(ctrl->dev, "%s: LightNVM init failure\n", __func__); | |
1660 | goto out_free_id; | |
1661 | } | |
ac81bfa9 | 1662 | |
3dc87dd0 MB |
1663 | disk = alloc_disk_node(0, node); |
1664 | if (!disk) | |
1665 | goto out_free_id; | |
ac81bfa9 | 1666 | |
3dc87dd0 MB |
1667 | disk->fops = &nvme_fops; |
1668 | disk->private_data = ns; | |
1669 | disk->queue = ns->queue; | |
1670 | disk->flags = GENHD_FL_EXT_DEVT; | |
1671 | memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); | |
1672 | ns->disk = disk; | |
1673 | ||
1674 | __nvme_revalidate_disk(disk, id); | |
5bae7f73 | 1675 | |
32f0c4af KB |
1676 | mutex_lock(&ctrl->namespaces_mutex); |
1677 | list_add_tail(&ns->list, &ctrl->namespaces); | |
1678 | mutex_unlock(&ctrl->namespaces_mutex); | |
1679 | ||
5bae7f73 | 1680 | kref_get(&ctrl->kref); |
ac81bfa9 MB |
1681 | |
1682 | kfree(id); | |
1683 | ||
0d52c756 | 1684 | device_add_disk(ctrl->device, ns->disk); |
2b9b6e86 KB |
1685 | if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, |
1686 | &nvme_ns_attr_group)) | |
1687 | pr_warn("%s: failed to create sysfs group for identification\n", | |
1688 | ns->disk->disk_name); | |
3dc87dd0 MB |
1689 | if (ns->ndev && nvme_nvm_register_sysfs(ns)) |
1690 | pr_warn("%s: failed to register lightnvm sysfs group for identification\n", | |
1691 | ns->disk->disk_name); | |
5bae7f73 | 1692 | return; |
ac81bfa9 MB |
1693 | out_free_id: |
1694 | kfree(id); | |
5bae7f73 CH |
1695 | out_free_queue: |
1696 | blk_cleanup_queue(ns->queue); | |
075790eb KB |
1697 | out_release_instance: |
1698 | ida_simple_remove(&ctrl->ns_ida, ns->instance); | |
5bae7f73 CH |
1699 | out_free_ns: |
1700 | kfree(ns); | |
1701 | } | |
1702 | ||
1703 | static void nvme_ns_remove(struct nvme_ns *ns) | |
1704 | { | |
646017a6 KB |
1705 | if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
1706 | return; | |
69d3b8ac | 1707 | |
b0b4e09c | 1708 | if (ns->disk && ns->disk->flags & GENHD_FL_UP) { |
5bae7f73 CH |
1709 | if (blk_get_integrity(ns->disk)) |
1710 | blk_integrity_unregister(ns->disk); | |
2b9b6e86 KB |
1711 | sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, |
1712 | &nvme_ns_attr_group); | |
3dc87dd0 MB |
1713 | if (ns->ndev) |
1714 | nvme_nvm_unregister_sysfs(ns); | |
5bae7f73 | 1715 | del_gendisk(ns->disk); |
5bae7f73 CH |
1716 | blk_mq_abort_requeue_list(ns->queue); |
1717 | blk_cleanup_queue(ns->queue); | |
1718 | } | |
32f0c4af KB |
1719 | |
1720 | mutex_lock(&ns->ctrl->namespaces_mutex); | |
5bae7f73 | 1721 | list_del_init(&ns->list); |
32f0c4af KB |
1722 | mutex_unlock(&ns->ctrl->namespaces_mutex); |
1723 | ||
5bae7f73 CH |
1724 | nvme_put_ns(ns); |
1725 | } | |
1726 | ||
540c801c KB |
1727 | static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
1728 | { | |
1729 | struct nvme_ns *ns; | |
1730 | ||
32f0c4af | 1731 | ns = nvme_find_get_ns(ctrl, nsid); |
540c801c | 1732 | if (ns) { |
b0b4e09c | 1733 | if (ns->disk && revalidate_disk(ns->disk)) |
540c801c | 1734 | nvme_ns_remove(ns); |
32f0c4af | 1735 | nvme_put_ns(ns); |
540c801c KB |
1736 | } else |
1737 | nvme_alloc_ns(ctrl, nsid); | |
1738 | } | |
1739 | ||
47b0e50a SB |
1740 | static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
1741 | unsigned nsid) | |
1742 | { | |
1743 | struct nvme_ns *ns, *next; | |
1744 | ||
1745 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { | |
1746 | if (ns->ns_id > nsid) | |
1747 | nvme_ns_remove(ns); | |
1748 | } | |
1749 | } | |
1750 | ||
540c801c KB |
1751 | static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn) |
1752 | { | |
1753 | struct nvme_ns *ns; | |
1754 | __le32 *ns_list; | |
1755 | unsigned i, j, nsid, prev = 0, num_lists = DIV_ROUND_UP(nn, 1024); | |
1756 | int ret = 0; | |
1757 | ||
1758 | ns_list = kzalloc(0x1000, GFP_KERNEL); | |
1759 | if (!ns_list) | |
1760 | return -ENOMEM; | |
1761 | ||
1762 | for (i = 0; i < num_lists; i++) { | |
1763 | ret = nvme_identify_ns_list(ctrl, prev, ns_list); | |
1764 | if (ret) | |
47b0e50a | 1765 | goto free; |
540c801c KB |
1766 | |
1767 | for (j = 0; j < min(nn, 1024U); j++) { | |
1768 | nsid = le32_to_cpu(ns_list[j]); | |
1769 | if (!nsid) | |
1770 | goto out; | |
1771 | ||
1772 | nvme_validate_ns(ctrl, nsid); | |
1773 | ||
1774 | while (++prev < nsid) { | |
32f0c4af KB |
1775 | ns = nvme_find_get_ns(ctrl, prev); |
1776 | if (ns) { | |
540c801c | 1777 | nvme_ns_remove(ns); |
32f0c4af KB |
1778 | nvme_put_ns(ns); |
1779 | } | |
540c801c KB |
1780 | } |
1781 | } | |
1782 | nn -= j; | |
1783 | } | |
1784 | out: | |
47b0e50a SB |
1785 | nvme_remove_invalid_namespaces(ctrl, prev); |
1786 | free: | |
540c801c KB |
1787 | kfree(ns_list); |
1788 | return ret; | |
1789 | } | |
1790 | ||
5955be21 | 1791 | static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl, unsigned nn) |
5bae7f73 | 1792 | { |
5bae7f73 CH |
1793 | unsigned i; |
1794 | ||
540c801c KB |
1795 | for (i = 1; i <= nn; i++) |
1796 | nvme_validate_ns(ctrl, i); | |
1797 | ||
47b0e50a | 1798 | nvme_remove_invalid_namespaces(ctrl, nn); |
5bae7f73 CH |
1799 | } |
1800 | ||
5955be21 | 1801 | static void nvme_scan_work(struct work_struct *work) |
5bae7f73 | 1802 | { |
5955be21 CH |
1803 | struct nvme_ctrl *ctrl = |
1804 | container_of(work, struct nvme_ctrl, scan_work); | |
5bae7f73 | 1805 | struct nvme_id_ctrl *id; |
540c801c | 1806 | unsigned nn; |
5bae7f73 | 1807 | |
5955be21 CH |
1808 | if (ctrl->state != NVME_CTRL_LIVE) |
1809 | return; | |
1810 | ||
5bae7f73 CH |
1811 | if (nvme_identify_ctrl(ctrl, &id)) |
1812 | return; | |
540c801c KB |
1813 | |
1814 | nn = le32_to_cpu(id->nn); | |
8ef2074d | 1815 | if (ctrl->vs >= NVME_VS(1, 1, 0) && |
540c801c KB |
1816 | !(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) { |
1817 | if (!nvme_scan_ns_list(ctrl, nn)) | |
1818 | goto done; | |
1819 | } | |
5955be21 | 1820 | nvme_scan_ns_sequential(ctrl, nn); |
540c801c | 1821 | done: |
32f0c4af | 1822 | mutex_lock(&ctrl->namespaces_mutex); |
540c801c | 1823 | list_sort(NULL, &ctrl->namespaces, ns_cmp); |
69d3b8ac | 1824 | mutex_unlock(&ctrl->namespaces_mutex); |
5bae7f73 CH |
1825 | kfree(id); |
1826 | } | |
5955be21 CH |
1827 | |
1828 | void nvme_queue_scan(struct nvme_ctrl *ctrl) | |
1829 | { | |
1830 | /* | |
1831 | * Do not queue new scan work when a controller is reset during | |
1832 | * removal. | |
1833 | */ | |
1834 | if (ctrl->state == NVME_CTRL_LIVE) | |
1835 | schedule_work(&ctrl->scan_work); | |
1836 | } | |
1837 | EXPORT_SYMBOL_GPL(nvme_queue_scan); | |
5bae7f73 | 1838 | |
32f0c4af KB |
1839 | /* |
1840 | * This function iterates the namespace list unlocked to allow recovery from | |
1841 | * controller failure. It is up to the caller to ensure the namespace list is | |
1842 | * not modified by scan work while this function is executing. | |
1843 | */ | |
5bae7f73 CH |
1844 | void nvme_remove_namespaces(struct nvme_ctrl *ctrl) |
1845 | { | |
1846 | struct nvme_ns *ns, *next; | |
1847 | ||
0ff9d4e1 KB |
1848 | /* |
1849 | * The dead states indicates the controller was not gracefully | |
1850 | * disconnected. In that case, we won't be able to flush any data while | |
1851 | * removing the namespaces' disks; fail all the queues now to avoid | |
1852 | * potentially having to clean up the failed sync later. | |
1853 | */ | |
1854 | if (ctrl->state == NVME_CTRL_DEAD) | |
1855 | nvme_kill_queues(ctrl); | |
1856 | ||
5bae7f73 CH |
1857 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) |
1858 | nvme_ns_remove(ns); | |
1859 | } | |
576d55d6 | 1860 | EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
5bae7f73 | 1861 | |
f866fc42 CH |
1862 | static void nvme_async_event_work(struct work_struct *work) |
1863 | { | |
1864 | struct nvme_ctrl *ctrl = | |
1865 | container_of(work, struct nvme_ctrl, async_event_work); | |
1866 | ||
1867 | spin_lock_irq(&ctrl->lock); | |
1868 | while (ctrl->event_limit > 0) { | |
1869 | int aer_idx = --ctrl->event_limit; | |
1870 | ||
1871 | spin_unlock_irq(&ctrl->lock); | |
1872 | ctrl->ops->submit_async_event(ctrl, aer_idx); | |
1873 | spin_lock_irq(&ctrl->lock); | |
1874 | } | |
1875 | spin_unlock_irq(&ctrl->lock); | |
1876 | } | |
1877 | ||
7bf58533 CH |
1878 | void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, |
1879 | union nvme_result *res) | |
f866fc42 | 1880 | { |
7bf58533 CH |
1881 | u32 result = le32_to_cpu(res->u32); |
1882 | bool done = true; | |
f866fc42 | 1883 | |
7bf58533 CH |
1884 | switch (le16_to_cpu(status) >> 1) { |
1885 | case NVME_SC_SUCCESS: | |
1886 | done = false; | |
1887 | /*FALLTHRU*/ | |
1888 | case NVME_SC_ABORT_REQ: | |
f866fc42 CH |
1889 | ++ctrl->event_limit; |
1890 | schedule_work(&ctrl->async_event_work); | |
7bf58533 CH |
1891 | break; |
1892 | default: | |
1893 | break; | |
f866fc42 CH |
1894 | } |
1895 | ||
7bf58533 | 1896 | if (done) |
f866fc42 CH |
1897 | return; |
1898 | ||
1899 | switch (result & 0xff07) { | |
1900 | case NVME_AER_NOTICE_NS_CHANGED: | |
1901 | dev_info(ctrl->device, "rescanning\n"); | |
1902 | nvme_queue_scan(ctrl); | |
1903 | break; | |
1904 | default: | |
1905 | dev_warn(ctrl->device, "async event result %08x\n", result); | |
1906 | } | |
1907 | } | |
1908 | EXPORT_SYMBOL_GPL(nvme_complete_async_event); | |
1909 | ||
1910 | void nvme_queue_async_events(struct nvme_ctrl *ctrl) | |
1911 | { | |
1912 | ctrl->event_limit = NVME_NR_AERS; | |
1913 | schedule_work(&ctrl->async_event_work); | |
1914 | } | |
1915 | EXPORT_SYMBOL_GPL(nvme_queue_async_events); | |
1916 | ||
f3ca80fc CH |
1917 | static DEFINE_IDA(nvme_instance_ida); |
1918 | ||
1919 | static int nvme_set_instance(struct nvme_ctrl *ctrl) | |
1920 | { | |
1921 | int instance, error; | |
1922 | ||
1923 | do { | |
1924 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) | |
1925 | return -ENODEV; | |
1926 | ||
1927 | spin_lock(&dev_list_lock); | |
1928 | error = ida_get_new(&nvme_instance_ida, &instance); | |
1929 | spin_unlock(&dev_list_lock); | |
1930 | } while (error == -EAGAIN); | |
1931 | ||
1932 | if (error) | |
1933 | return -ENODEV; | |
1934 | ||
1935 | ctrl->instance = instance; | |
1936 | return 0; | |
1937 | } | |
1938 | ||
1939 | static void nvme_release_instance(struct nvme_ctrl *ctrl) | |
1940 | { | |
1941 | spin_lock(&dev_list_lock); | |
1942 | ida_remove(&nvme_instance_ida, ctrl->instance); | |
1943 | spin_unlock(&dev_list_lock); | |
1944 | } | |
1945 | ||
53029b04 | 1946 | void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
576d55d6 | 1947 | { |
f866fc42 | 1948 | flush_work(&ctrl->async_event_work); |
5955be21 CH |
1949 | flush_work(&ctrl->scan_work); |
1950 | nvme_remove_namespaces(ctrl); | |
1951 | ||
53029b04 | 1952 | device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance)); |
f3ca80fc CH |
1953 | |
1954 | spin_lock(&dev_list_lock); | |
1955 | list_del(&ctrl->node); | |
1956 | spin_unlock(&dev_list_lock); | |
53029b04 | 1957 | } |
576d55d6 | 1958 | EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
53029b04 KB |
1959 | |
1960 | static void nvme_free_ctrl(struct kref *kref) | |
1961 | { | |
1962 | struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref); | |
f3ca80fc CH |
1963 | |
1964 | put_device(ctrl->device); | |
1965 | nvme_release_instance(ctrl); | |
075790eb | 1966 | ida_destroy(&ctrl->ns_ida); |
f3ca80fc CH |
1967 | |
1968 | ctrl->ops->free_ctrl(ctrl); | |
1969 | } | |
1970 | ||
1971 | void nvme_put_ctrl(struct nvme_ctrl *ctrl) | |
1972 | { | |
1973 | kref_put(&ctrl->kref, nvme_free_ctrl); | |
1974 | } | |
576d55d6 | 1975 | EXPORT_SYMBOL_GPL(nvme_put_ctrl); |
f3ca80fc CH |
1976 | |
1977 | /* | |
1978 | * Initialize a NVMe controller structures. This needs to be called during | |
1979 | * earliest initialization so that we have the initialized structured around | |
1980 | * during probing. | |
1981 | */ | |
1982 | int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, | |
1983 | const struct nvme_ctrl_ops *ops, unsigned long quirks) | |
1984 | { | |
1985 | int ret; | |
1986 | ||
bb8d261e CH |
1987 | ctrl->state = NVME_CTRL_NEW; |
1988 | spin_lock_init(&ctrl->lock); | |
f3ca80fc | 1989 | INIT_LIST_HEAD(&ctrl->namespaces); |
69d3b8ac | 1990 | mutex_init(&ctrl->namespaces_mutex); |
f3ca80fc CH |
1991 | kref_init(&ctrl->kref); |
1992 | ctrl->dev = dev; | |
1993 | ctrl->ops = ops; | |
1994 | ctrl->quirks = quirks; | |
5955be21 | 1995 | INIT_WORK(&ctrl->scan_work, nvme_scan_work); |
f866fc42 | 1996 | INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); |
f3ca80fc CH |
1997 | |
1998 | ret = nvme_set_instance(ctrl); | |
1999 | if (ret) | |
2000 | goto out; | |
2001 | ||
779ff756 | 2002 | ctrl->device = device_create_with_groups(nvme_class, ctrl->dev, |
f3ca80fc | 2003 | MKDEV(nvme_char_major, ctrl->instance), |
f4f0f63e | 2004 | ctrl, nvme_dev_attr_groups, |
779ff756 | 2005 | "nvme%d", ctrl->instance); |
f3ca80fc CH |
2006 | if (IS_ERR(ctrl->device)) { |
2007 | ret = PTR_ERR(ctrl->device); | |
2008 | goto out_release_instance; | |
2009 | } | |
2010 | get_device(ctrl->device); | |
075790eb | 2011 | ida_init(&ctrl->ns_ida); |
f3ca80fc | 2012 | |
f3ca80fc CH |
2013 | spin_lock(&dev_list_lock); |
2014 | list_add_tail(&ctrl->node, &nvme_ctrl_list); | |
2015 | spin_unlock(&dev_list_lock); | |
2016 | ||
2017 | return 0; | |
f3ca80fc CH |
2018 | out_release_instance: |
2019 | nvme_release_instance(ctrl); | |
2020 | out: | |
2021 | return ret; | |
2022 | } | |
576d55d6 | 2023 | EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
f3ca80fc | 2024 | |
69d9a99c KB |
2025 | /** |
2026 | * nvme_kill_queues(): Ends all namespace queues | |
2027 | * @ctrl: the dead controller that needs to end | |
2028 | * | |
2029 | * Call this function when the driver determines it is unable to get the | |
2030 | * controller in a state capable of servicing IO. | |
2031 | */ | |
2032 | void nvme_kill_queues(struct nvme_ctrl *ctrl) | |
2033 | { | |
2034 | struct nvme_ns *ns; | |
2035 | ||
32f0c4af KB |
2036 | mutex_lock(&ctrl->namespaces_mutex); |
2037 | list_for_each_entry(ns, &ctrl->namespaces, list) { | |
69d9a99c KB |
2038 | /* |
2039 | * Revalidating a dead namespace sets capacity to 0. This will | |
2040 | * end buffered writers dirtying pages that can't be synced. | |
2041 | */ | |
b0b4e09c | 2042 | if (ns->disk && !test_and_set_bit(NVME_NS_DEAD, &ns->flags)) |
69d9a99c KB |
2043 | revalidate_disk(ns->disk); |
2044 | ||
2045 | blk_set_queue_dying(ns->queue); | |
2046 | blk_mq_abort_requeue_list(ns->queue); | |
2047 | blk_mq_start_stopped_hw_queues(ns->queue, true); | |
69d9a99c | 2048 | } |
32f0c4af | 2049 | mutex_unlock(&ctrl->namespaces_mutex); |
69d9a99c | 2050 | } |
237045fc | 2051 | EXPORT_SYMBOL_GPL(nvme_kill_queues); |
69d9a99c | 2052 | |
25646264 | 2053 | void nvme_stop_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
2054 | { |
2055 | struct nvme_ns *ns; | |
2056 | ||
32f0c4af | 2057 | mutex_lock(&ctrl->namespaces_mutex); |
a6eaa884 | 2058 | list_for_each_entry(ns, &ctrl->namespaces, list) |
3174dd33 | 2059 | blk_mq_quiesce_queue(ns->queue); |
32f0c4af | 2060 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 2061 | } |
576d55d6 | 2062 | EXPORT_SYMBOL_GPL(nvme_stop_queues); |
363c9aac | 2063 | |
25646264 | 2064 | void nvme_start_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
2065 | { |
2066 | struct nvme_ns *ns; | |
2067 | ||
32f0c4af KB |
2068 | mutex_lock(&ctrl->namespaces_mutex); |
2069 | list_for_each_entry(ns, &ctrl->namespaces, list) { | |
363c9aac SG |
2070 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
2071 | blk_mq_kick_requeue_list(ns->queue); | |
2072 | } | |
32f0c4af | 2073 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 2074 | } |
576d55d6 | 2075 | EXPORT_SYMBOL_GPL(nvme_start_queues); |
363c9aac | 2076 | |
5bae7f73 CH |
2077 | int __init nvme_core_init(void) |
2078 | { | |
2079 | int result; | |
2080 | ||
f3ca80fc CH |
2081 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
2082 | &nvme_dev_fops); | |
2083 | if (result < 0) | |
b09dcf58 | 2084 | return result; |
f3ca80fc CH |
2085 | else if (result > 0) |
2086 | nvme_char_major = result; | |
2087 | ||
2088 | nvme_class = class_create(THIS_MODULE, "nvme"); | |
2089 | if (IS_ERR(nvme_class)) { | |
2090 | result = PTR_ERR(nvme_class); | |
2091 | goto unregister_chrdev; | |
2092 | } | |
2093 | ||
5bae7f73 | 2094 | return 0; |
f3ca80fc CH |
2095 | |
2096 | unregister_chrdev: | |
2097 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
f3ca80fc | 2098 | return result; |
5bae7f73 CH |
2099 | } |
2100 | ||
2101 | void nvme_core_exit(void) | |
2102 | { | |
f3ca80fc CH |
2103 | class_destroy(nvme_class); |
2104 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
5bae7f73 | 2105 | } |
576d55d6 ML |
2106 | |
2107 | MODULE_LICENSE("GPL"); | |
2108 | MODULE_VERSION("1.0"); | |
2109 | module_init(nvme_core_init); | |
2110 | module_exit(nvme_core_exit); |