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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" | |
33 | ||
f3ca80fc CH |
34 | #define NVME_MINORS (1U << MINORBITS) |
35 | ||
ba0ba7d3 ML |
36 | unsigned char admin_timeout = 60; |
37 | module_param(admin_timeout, byte, 0644); | |
38 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); | |
576d55d6 | 39 | EXPORT_SYMBOL_GPL(admin_timeout); |
ba0ba7d3 ML |
40 | |
41 | unsigned char nvme_io_timeout = 30; | |
42 | module_param_named(io_timeout, nvme_io_timeout, byte, 0644); | |
43 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); | |
576d55d6 | 44 | EXPORT_SYMBOL_GPL(nvme_io_timeout); |
ba0ba7d3 ML |
45 | |
46 | unsigned char shutdown_timeout = 5; | |
47 | module_param(shutdown_timeout, byte, 0644); | |
48 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); | |
49 | ||
5bae7f73 CH |
50 | static int nvme_major; |
51 | module_param(nvme_major, int, 0); | |
52 | ||
f3ca80fc CH |
53 | static int nvme_char_major; |
54 | module_param(nvme_char_major, int, 0); | |
55 | ||
56 | static LIST_HEAD(nvme_ctrl_list); | |
9f2482b9 | 57 | static DEFINE_SPINLOCK(dev_list_lock); |
1673f1f0 | 58 | |
f3ca80fc CH |
59 | static struct class *nvme_class; |
60 | ||
1673f1f0 CH |
61 | static void nvme_free_ns(struct kref *kref) |
62 | { | |
63 | struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); | |
64 | ||
65 | if (ns->type == NVME_NS_LIGHTNVM) | |
66 | nvme_nvm_unregister(ns->queue, ns->disk->disk_name); | |
67 | ||
68 | spin_lock(&dev_list_lock); | |
69 | ns->disk->private_data = NULL; | |
70 | spin_unlock(&dev_list_lock); | |
71 | ||
1673f1f0 | 72 | put_disk(ns->disk); |
075790eb KB |
73 | ida_simple_remove(&ns->ctrl->ns_ida, ns->instance); |
74 | nvme_put_ctrl(ns->ctrl); | |
1673f1f0 CH |
75 | kfree(ns); |
76 | } | |
77 | ||
5bae7f73 | 78 | static void nvme_put_ns(struct nvme_ns *ns) |
1673f1f0 CH |
79 | { |
80 | kref_put(&ns->kref, nvme_free_ns); | |
81 | } | |
82 | ||
83 | static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk) | |
84 | { | |
85 | struct nvme_ns *ns; | |
86 | ||
87 | spin_lock(&dev_list_lock); | |
88 | ns = disk->private_data; | |
e439bb12 SG |
89 | if (ns) { |
90 | if (!kref_get_unless_zero(&ns->kref)) | |
91 | goto fail; | |
92 | if (!try_module_get(ns->ctrl->ops->module)) | |
93 | goto fail_put_ns; | |
94 | } | |
1673f1f0 CH |
95 | spin_unlock(&dev_list_lock); |
96 | ||
97 | return ns; | |
e439bb12 SG |
98 | |
99 | fail_put_ns: | |
100 | kref_put(&ns->kref, nvme_free_ns); | |
101 | fail: | |
102 | spin_unlock(&dev_list_lock); | |
103 | return NULL; | |
1673f1f0 CH |
104 | } |
105 | ||
7688faa6 CH |
106 | void nvme_requeue_req(struct request *req) |
107 | { | |
108 | unsigned long flags; | |
109 | ||
110 | blk_mq_requeue_request(req); | |
111 | spin_lock_irqsave(req->q->queue_lock, flags); | |
112 | if (!blk_queue_stopped(req->q)) | |
113 | blk_mq_kick_requeue_list(req->q); | |
114 | spin_unlock_irqrestore(req->q->queue_lock, flags); | |
115 | } | |
576d55d6 | 116 | EXPORT_SYMBOL_GPL(nvme_requeue_req); |
7688faa6 | 117 | |
4160982e CH |
118 | struct request *nvme_alloc_request(struct request_queue *q, |
119 | struct nvme_command *cmd, unsigned int flags) | |
21d34711 CH |
120 | { |
121 | bool write = cmd->common.opcode & 1; | |
21d34711 | 122 | struct request *req; |
21d34711 | 123 | |
4160982e | 124 | req = blk_mq_alloc_request(q, write, flags); |
21d34711 | 125 | if (IS_ERR(req)) |
4160982e | 126 | return req; |
21d34711 CH |
127 | |
128 | req->cmd_type = REQ_TYPE_DRV_PRIV; | |
129 | req->cmd_flags |= REQ_FAILFAST_DRIVER; | |
130 | req->__data_len = 0; | |
131 | req->__sector = (sector_t) -1; | |
132 | req->bio = req->biotail = NULL; | |
133 | ||
21d34711 CH |
134 | req->cmd = (unsigned char *)cmd; |
135 | req->cmd_len = sizeof(struct nvme_command); | |
21d34711 | 136 | |
4160982e CH |
137 | return req; |
138 | } | |
576d55d6 | 139 | EXPORT_SYMBOL_GPL(nvme_alloc_request); |
4160982e | 140 | |
8093f7ca ML |
141 | static inline void nvme_setup_flush(struct nvme_ns *ns, |
142 | struct nvme_command *cmnd) | |
143 | { | |
144 | memset(cmnd, 0, sizeof(*cmnd)); | |
145 | cmnd->common.opcode = nvme_cmd_flush; | |
146 | cmnd->common.nsid = cpu_to_le32(ns->ns_id); | |
147 | } | |
148 | ||
149 | static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, | |
150 | struct nvme_command *cmnd) | |
151 | { | |
152 | struct nvme_dsm_range *range; | |
153 | struct page *page; | |
154 | int offset; | |
155 | unsigned int nr_bytes = blk_rq_bytes(req); | |
156 | ||
157 | range = kmalloc(sizeof(*range), GFP_ATOMIC); | |
158 | if (!range) | |
159 | return BLK_MQ_RQ_QUEUE_BUSY; | |
160 | ||
161 | range->cattr = cpu_to_le32(0); | |
162 | range->nlb = cpu_to_le32(nr_bytes >> ns->lba_shift); | |
163 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
164 | ||
165 | memset(cmnd, 0, sizeof(*cmnd)); | |
166 | cmnd->dsm.opcode = nvme_cmd_dsm; | |
167 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); | |
168 | cmnd->dsm.nr = 0; | |
169 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); | |
170 | ||
171 | req->completion_data = range; | |
172 | page = virt_to_page(range); | |
173 | offset = offset_in_page(range); | |
174 | blk_add_request_payload(req, page, offset, sizeof(*range)); | |
175 | ||
176 | /* | |
177 | * we set __data_len back to the size of the area to be discarded | |
178 | * on disk. This allows us to report completion on the full amount | |
179 | * of blocks described by the request. | |
180 | */ | |
181 | req->__data_len = nr_bytes; | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, | |
187 | struct nvme_command *cmnd) | |
188 | { | |
189 | u16 control = 0; | |
190 | u32 dsmgmt = 0; | |
191 | ||
192 | if (req->cmd_flags & REQ_FUA) | |
193 | control |= NVME_RW_FUA; | |
194 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) | |
195 | control |= NVME_RW_LR; | |
196 | ||
197 | if (req->cmd_flags & REQ_RAHEAD) | |
198 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; | |
199 | ||
200 | memset(cmnd, 0, sizeof(*cmnd)); | |
201 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); | |
202 | cmnd->rw.command_id = req->tag; | |
203 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); | |
204 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
205 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); | |
206 | ||
207 | if (ns->ms) { | |
208 | switch (ns->pi_type) { | |
209 | case NVME_NS_DPS_PI_TYPE3: | |
210 | control |= NVME_RW_PRINFO_PRCHK_GUARD; | |
211 | break; | |
212 | case NVME_NS_DPS_PI_TYPE1: | |
213 | case NVME_NS_DPS_PI_TYPE2: | |
214 | control |= NVME_RW_PRINFO_PRCHK_GUARD | | |
215 | NVME_RW_PRINFO_PRCHK_REF; | |
216 | cmnd->rw.reftag = cpu_to_le32( | |
217 | nvme_block_nr(ns, blk_rq_pos(req))); | |
218 | break; | |
219 | } | |
220 | if (!blk_integrity_rq(req)) | |
221 | control |= NVME_RW_PRINFO_PRACT; | |
222 | } | |
223 | ||
224 | cmnd->rw.control = cpu_to_le16(control); | |
225 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); | |
226 | } | |
227 | ||
228 | int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, | |
229 | struct nvme_command *cmd) | |
230 | { | |
231 | int ret = 0; | |
232 | ||
233 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) | |
234 | memcpy(cmd, req->cmd, sizeof(*cmd)); | |
235 | else if (req->cmd_flags & REQ_FLUSH) | |
236 | nvme_setup_flush(ns, cmd); | |
237 | else if (req->cmd_flags & REQ_DISCARD) | |
238 | ret = nvme_setup_discard(ns, req, cmd); | |
239 | else | |
240 | nvme_setup_rw(ns, req, cmd); | |
241 | ||
242 | return ret; | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(nvme_setup_cmd); | |
245 | ||
4160982e CH |
246 | /* |
247 | * Returns 0 on success. If the result is negative, it's a Linux error code; | |
248 | * if the result is positive, it's an NVM Express status code | |
249 | */ | |
250 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
1cb3cce5 CH |
251 | struct nvme_completion *cqe, void *buffer, unsigned bufflen, |
252 | unsigned timeout) | |
4160982e CH |
253 | { |
254 | struct request *req; | |
255 | int ret; | |
256 | ||
257 | req = nvme_alloc_request(q, cmd, 0); | |
258 | if (IS_ERR(req)) | |
259 | return PTR_ERR(req); | |
260 | ||
261 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
1cb3cce5 | 262 | req->special = cqe; |
4160982e | 263 | |
21d34711 CH |
264 | if (buffer && bufflen) { |
265 | ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); | |
266 | if (ret) | |
267 | goto out; | |
4160982e CH |
268 | } |
269 | ||
270 | blk_execute_rq(req->q, NULL, req, 0); | |
4160982e CH |
271 | ret = req->errors; |
272 | out: | |
273 | blk_mq_free_request(req); | |
274 | return ret; | |
275 | } | |
276 | ||
277 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
278 | void *buffer, unsigned bufflen) | |
279 | { | |
1cb3cce5 | 280 | return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0); |
4160982e | 281 | } |
576d55d6 | 282 | EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
4160982e | 283 | |
0b7f1f26 KB |
284 | int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
285 | void __user *ubuffer, unsigned bufflen, | |
286 | void __user *meta_buffer, unsigned meta_len, u32 meta_seed, | |
287 | u32 *result, unsigned timeout) | |
4160982e | 288 | { |
0b7f1f26 | 289 | bool write = cmd->common.opcode & 1; |
1cb3cce5 | 290 | struct nvme_completion cqe; |
0b7f1f26 KB |
291 | struct nvme_ns *ns = q->queuedata; |
292 | struct gendisk *disk = ns ? ns->disk : NULL; | |
4160982e | 293 | struct request *req; |
0b7f1f26 KB |
294 | struct bio *bio = NULL; |
295 | void *meta = NULL; | |
4160982e CH |
296 | int ret; |
297 | ||
298 | req = nvme_alloc_request(q, cmd, 0); | |
299 | if (IS_ERR(req)) | |
300 | return PTR_ERR(req); | |
301 | ||
302 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; | |
1cb3cce5 | 303 | req->special = &cqe; |
4160982e CH |
304 | |
305 | if (ubuffer && bufflen) { | |
21d34711 CH |
306 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
307 | GFP_KERNEL); | |
308 | if (ret) | |
309 | goto out; | |
310 | bio = req->bio; | |
21d34711 | 311 | |
0b7f1f26 KB |
312 | if (!disk) |
313 | goto submit; | |
314 | bio->bi_bdev = bdget_disk(disk, 0); | |
315 | if (!bio->bi_bdev) { | |
316 | ret = -ENODEV; | |
317 | goto out_unmap; | |
318 | } | |
319 | ||
e9fc63d6 | 320 | if (meta_buffer && meta_len) { |
0b7f1f26 KB |
321 | struct bio_integrity_payload *bip; |
322 | ||
323 | meta = kmalloc(meta_len, GFP_KERNEL); | |
324 | if (!meta) { | |
325 | ret = -ENOMEM; | |
326 | goto out_unmap; | |
327 | } | |
328 | ||
329 | if (write) { | |
330 | if (copy_from_user(meta, meta_buffer, | |
331 | meta_len)) { | |
332 | ret = -EFAULT; | |
333 | goto out_free_meta; | |
334 | } | |
335 | } | |
336 | ||
337 | bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); | |
06c1e390 KB |
338 | if (IS_ERR(bip)) { |
339 | ret = PTR_ERR(bip); | |
0b7f1f26 KB |
340 | goto out_free_meta; |
341 | } | |
342 | ||
343 | bip->bip_iter.bi_size = meta_len; | |
344 | bip->bip_iter.bi_sector = meta_seed; | |
345 | ||
346 | ret = bio_integrity_add_page(bio, virt_to_page(meta), | |
347 | meta_len, offset_in_page(meta)); | |
348 | if (ret != meta_len) { | |
349 | ret = -ENOMEM; | |
350 | goto out_free_meta; | |
351 | } | |
352 | } | |
353 | } | |
354 | submit: | |
355 | blk_execute_rq(req->q, disk, req, 0); | |
356 | ret = req->errors; | |
21d34711 | 357 | if (result) |
1cb3cce5 | 358 | *result = le32_to_cpu(cqe.result); |
0b7f1f26 KB |
359 | if (meta && !ret && !write) { |
360 | if (copy_to_user(meta_buffer, meta, meta_len)) | |
361 | ret = -EFAULT; | |
362 | } | |
363 | out_free_meta: | |
364 | kfree(meta); | |
365 | out_unmap: | |
366 | if (bio) { | |
367 | if (disk && bio->bi_bdev) | |
368 | bdput(bio->bi_bdev); | |
369 | blk_rq_unmap_user(bio); | |
370 | } | |
21d34711 CH |
371 | out: |
372 | blk_mq_free_request(req); | |
373 | return ret; | |
374 | } | |
375 | ||
0b7f1f26 KB |
376 | int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
377 | void __user *ubuffer, unsigned bufflen, u32 *result, | |
378 | unsigned timeout) | |
379 | { | |
380 | return __nvme_submit_user_cmd(q, cmd, ubuffer, bufflen, NULL, 0, 0, | |
381 | result, timeout); | |
382 | } | |
383 | ||
1c63dc66 | 384 | int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
21d34711 CH |
385 | { |
386 | struct nvme_command c = { }; | |
387 | int error; | |
388 | ||
389 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
390 | c.identify.opcode = nvme_admin_identify; | |
391 | c.identify.cns = cpu_to_le32(1); | |
392 | ||
393 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); | |
394 | if (!*id) | |
395 | return -ENOMEM; | |
396 | ||
397 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
398 | sizeof(struct nvme_id_ctrl)); | |
399 | if (error) | |
400 | kfree(*id); | |
401 | return error; | |
402 | } | |
403 | ||
540c801c KB |
404 | static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list) |
405 | { | |
406 | struct nvme_command c = { }; | |
407 | ||
408 | c.identify.opcode = nvme_admin_identify; | |
409 | c.identify.cns = cpu_to_le32(2); | |
410 | c.identify.nsid = cpu_to_le32(nsid); | |
411 | return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, 0x1000); | |
412 | } | |
413 | ||
1c63dc66 | 414 | int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, |
21d34711 CH |
415 | struct nvme_id_ns **id) |
416 | { | |
417 | struct nvme_command c = { }; | |
418 | int error; | |
419 | ||
420 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ | |
421 | c.identify.opcode = nvme_admin_identify, | |
422 | c.identify.nsid = cpu_to_le32(nsid), | |
423 | ||
424 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); | |
425 | if (!*id) | |
426 | return -ENOMEM; | |
427 | ||
428 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
429 | sizeof(struct nvme_id_ns)); | |
430 | if (error) | |
431 | kfree(*id); | |
432 | return error; | |
433 | } | |
434 | ||
1c63dc66 | 435 | int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, |
21d34711 CH |
436 | dma_addr_t dma_addr, u32 *result) |
437 | { | |
438 | struct nvme_command c; | |
1cb3cce5 CH |
439 | struct nvme_completion cqe; |
440 | int ret; | |
21d34711 CH |
441 | |
442 | memset(&c, 0, sizeof(c)); | |
443 | c.features.opcode = nvme_admin_get_features; | |
444 | c.features.nsid = cpu_to_le32(nsid); | |
445 | c.features.prp1 = cpu_to_le64(dma_addr); | |
446 | c.features.fid = cpu_to_le32(fid); | |
447 | ||
1cb3cce5 CH |
448 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, NULL, 0, 0); |
449 | if (ret >= 0) | |
450 | *result = le32_to_cpu(cqe.result); | |
451 | return ret; | |
21d34711 CH |
452 | } |
453 | ||
1c63dc66 | 454 | int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, |
21d34711 CH |
455 | dma_addr_t dma_addr, u32 *result) |
456 | { | |
457 | struct nvme_command c; | |
1cb3cce5 CH |
458 | struct nvme_completion cqe; |
459 | int ret; | |
21d34711 CH |
460 | |
461 | memset(&c, 0, sizeof(c)); | |
462 | c.features.opcode = nvme_admin_set_features; | |
463 | c.features.prp1 = cpu_to_le64(dma_addr); | |
464 | c.features.fid = cpu_to_le32(fid); | |
465 | c.features.dword11 = cpu_to_le32(dword11); | |
466 | ||
1cb3cce5 CH |
467 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, NULL, 0, 0); |
468 | if (ret >= 0) | |
469 | *result = le32_to_cpu(cqe.result); | |
470 | return ret; | |
21d34711 CH |
471 | } |
472 | ||
1c63dc66 | 473 | int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log) |
21d34711 CH |
474 | { |
475 | struct nvme_command c = { }; | |
476 | int error; | |
477 | ||
478 | c.common.opcode = nvme_admin_get_log_page, | |
479 | c.common.nsid = cpu_to_le32(0xFFFFFFFF), | |
480 | c.common.cdw10[0] = cpu_to_le32( | |
481 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | | |
482 | NVME_LOG_SMART), | |
483 | ||
484 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); | |
485 | if (!*log) | |
486 | return -ENOMEM; | |
487 | ||
488 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, | |
489 | sizeof(struct nvme_smart_log)); | |
490 | if (error) | |
491 | kfree(*log); | |
492 | return error; | |
493 | } | |
1673f1f0 | 494 | |
9a0be7ab CH |
495 | int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
496 | { | |
497 | u32 q_count = (*count - 1) | ((*count - 1) << 16); | |
498 | u32 result; | |
499 | int status, nr_io_queues; | |
500 | ||
501 | status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, 0, | |
502 | &result); | |
503 | if (status) | |
504 | return status; | |
505 | ||
506 | nr_io_queues = min(result & 0xffff, result >> 16) + 1; | |
507 | *count = min(*count, nr_io_queues); | |
508 | return 0; | |
509 | } | |
576d55d6 | 510 | EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
9a0be7ab | 511 | |
1673f1f0 CH |
512 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
513 | { | |
514 | struct nvme_user_io io; | |
515 | struct nvme_command c; | |
516 | unsigned length, meta_len; | |
517 | void __user *metadata; | |
518 | ||
519 | if (copy_from_user(&io, uio, sizeof(io))) | |
520 | return -EFAULT; | |
63088ec7 KB |
521 | if (io.flags) |
522 | return -EINVAL; | |
1673f1f0 CH |
523 | |
524 | switch (io.opcode) { | |
525 | case nvme_cmd_write: | |
526 | case nvme_cmd_read: | |
527 | case nvme_cmd_compare: | |
528 | break; | |
529 | default: | |
530 | return -EINVAL; | |
531 | } | |
532 | ||
533 | length = (io.nblocks + 1) << ns->lba_shift; | |
534 | meta_len = (io.nblocks + 1) * ns->ms; | |
535 | metadata = (void __user *)(uintptr_t)io.metadata; | |
536 | ||
537 | if (ns->ext) { | |
538 | length += meta_len; | |
539 | meta_len = 0; | |
540 | } else if (meta_len) { | |
541 | if ((io.metadata & 3) || !io.metadata) | |
542 | return -EINVAL; | |
543 | } | |
544 | ||
545 | memset(&c, 0, sizeof(c)); | |
546 | c.rw.opcode = io.opcode; | |
547 | c.rw.flags = io.flags; | |
548 | c.rw.nsid = cpu_to_le32(ns->ns_id); | |
549 | c.rw.slba = cpu_to_le64(io.slba); | |
550 | c.rw.length = cpu_to_le16(io.nblocks); | |
551 | c.rw.control = cpu_to_le16(io.control); | |
552 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); | |
553 | c.rw.reftag = cpu_to_le32(io.reftag); | |
554 | c.rw.apptag = cpu_to_le16(io.apptag); | |
555 | c.rw.appmask = cpu_to_le16(io.appmask); | |
556 | ||
557 | return __nvme_submit_user_cmd(ns->queue, &c, | |
558 | (void __user *)(uintptr_t)io.addr, length, | |
559 | metadata, meta_len, io.slba, NULL, 0); | |
560 | } | |
561 | ||
f3ca80fc | 562 | static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
1673f1f0 CH |
563 | struct nvme_passthru_cmd __user *ucmd) |
564 | { | |
565 | struct nvme_passthru_cmd cmd; | |
566 | struct nvme_command c; | |
567 | unsigned timeout = 0; | |
568 | int status; | |
569 | ||
570 | if (!capable(CAP_SYS_ADMIN)) | |
571 | return -EACCES; | |
572 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) | |
573 | return -EFAULT; | |
63088ec7 KB |
574 | if (cmd.flags) |
575 | return -EINVAL; | |
1673f1f0 CH |
576 | |
577 | memset(&c, 0, sizeof(c)); | |
578 | c.common.opcode = cmd.opcode; | |
579 | c.common.flags = cmd.flags; | |
580 | c.common.nsid = cpu_to_le32(cmd.nsid); | |
581 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); | |
582 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); | |
583 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); | |
584 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); | |
585 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); | |
586 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); | |
587 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); | |
588 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); | |
589 | ||
590 | if (cmd.timeout_ms) | |
591 | timeout = msecs_to_jiffies(cmd.timeout_ms); | |
592 | ||
593 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, | |
d1ea7be5 | 594 | (void __user *)(uintptr_t)cmd.addr, cmd.data_len, |
1673f1f0 CH |
595 | &cmd.result, timeout); |
596 | if (status >= 0) { | |
597 | if (put_user(cmd.result, &ucmd->result)) | |
598 | return -EFAULT; | |
599 | } | |
600 | ||
601 | return status; | |
602 | } | |
603 | ||
604 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, | |
605 | unsigned int cmd, unsigned long arg) | |
606 | { | |
607 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
608 | ||
609 | switch (cmd) { | |
610 | case NVME_IOCTL_ID: | |
611 | force_successful_syscall_return(); | |
612 | return ns->ns_id; | |
613 | case NVME_IOCTL_ADMIN_CMD: | |
614 | return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg); | |
615 | case NVME_IOCTL_IO_CMD: | |
616 | return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); | |
617 | case NVME_IOCTL_SUBMIT_IO: | |
618 | return nvme_submit_io(ns, (void __user *)arg); | |
44907332 | 619 | #ifdef CONFIG_BLK_DEV_NVME_SCSI |
1673f1f0 CH |
620 | case SG_GET_VERSION_NUM: |
621 | return nvme_sg_get_version_num((void __user *)arg); | |
622 | case SG_IO: | |
623 | return nvme_sg_io(ns, (void __user *)arg); | |
44907332 | 624 | #endif |
1673f1f0 CH |
625 | default: |
626 | return -ENOTTY; | |
627 | } | |
628 | } | |
629 | ||
630 | #ifdef CONFIG_COMPAT | |
631 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
632 | unsigned int cmd, unsigned long arg) | |
633 | { | |
634 | switch (cmd) { | |
635 | case SG_IO: | |
636 | return -ENOIOCTLCMD; | |
637 | } | |
638 | return nvme_ioctl(bdev, mode, cmd, arg); | |
639 | } | |
640 | #else | |
641 | #define nvme_compat_ioctl NULL | |
642 | #endif | |
643 | ||
644 | static int nvme_open(struct block_device *bdev, fmode_t mode) | |
645 | { | |
646 | return nvme_get_ns_from_disk(bdev->bd_disk) ? 0 : -ENXIO; | |
647 | } | |
648 | ||
649 | static void nvme_release(struct gendisk *disk, fmode_t mode) | |
650 | { | |
e439bb12 SG |
651 | struct nvme_ns *ns = disk->private_data; |
652 | ||
653 | module_put(ns->ctrl->ops->module); | |
654 | nvme_put_ns(ns); | |
1673f1f0 CH |
655 | } |
656 | ||
657 | static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
658 | { | |
659 | /* some standard values */ | |
660 | geo->heads = 1 << 6; | |
661 | geo->sectors = 1 << 5; | |
662 | geo->cylinders = get_capacity(bdev->bd_disk) >> 11; | |
663 | return 0; | |
664 | } | |
665 | ||
666 | #ifdef CONFIG_BLK_DEV_INTEGRITY | |
667 | static void nvme_init_integrity(struct nvme_ns *ns) | |
668 | { | |
669 | struct blk_integrity integrity; | |
670 | ||
671 | switch (ns->pi_type) { | |
672 | case NVME_NS_DPS_PI_TYPE3: | |
673 | integrity.profile = &t10_pi_type3_crc; | |
674 | break; | |
675 | case NVME_NS_DPS_PI_TYPE1: | |
676 | case NVME_NS_DPS_PI_TYPE2: | |
677 | integrity.profile = &t10_pi_type1_crc; | |
678 | break; | |
679 | default: | |
680 | integrity.profile = NULL; | |
681 | break; | |
682 | } | |
683 | integrity.tuple_size = ns->ms; | |
684 | blk_integrity_register(ns->disk, &integrity); | |
685 | blk_queue_max_integrity_segments(ns->queue, 1); | |
686 | } | |
687 | #else | |
688 | static void nvme_init_integrity(struct nvme_ns *ns) | |
689 | { | |
690 | } | |
691 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
692 | ||
693 | static void nvme_config_discard(struct nvme_ns *ns) | |
694 | { | |
08095e70 | 695 | struct nvme_ctrl *ctrl = ns->ctrl; |
1673f1f0 | 696 | u32 logical_block_size = queue_logical_block_size(ns->queue); |
08095e70 KB |
697 | |
698 | if (ctrl->quirks & NVME_QUIRK_DISCARD_ZEROES) | |
699 | ns->queue->limits.discard_zeroes_data = 1; | |
700 | else | |
701 | ns->queue->limits.discard_zeroes_data = 0; | |
702 | ||
1673f1f0 CH |
703 | ns->queue->limits.discard_alignment = logical_block_size; |
704 | ns->queue->limits.discard_granularity = logical_block_size; | |
705 | blk_queue_max_discard_sectors(ns->queue, 0xffffffff); | |
706 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); | |
707 | } | |
708 | ||
5bae7f73 | 709 | static int nvme_revalidate_disk(struct gendisk *disk) |
1673f1f0 CH |
710 | { |
711 | struct nvme_ns *ns = disk->private_data; | |
712 | struct nvme_id_ns *id; | |
713 | u8 lbaf, pi_type; | |
714 | u16 old_ms; | |
715 | unsigned short bs; | |
716 | ||
69d9a99c KB |
717 | if (test_bit(NVME_NS_DEAD, &ns->flags)) { |
718 | set_capacity(disk, 0); | |
719 | return -ENODEV; | |
720 | } | |
1673f1f0 | 721 | if (nvme_identify_ns(ns->ctrl, ns->ns_id, &id)) { |
1b3c47c1 SG |
722 | dev_warn(disk_to_dev(ns->disk), "%s: Identify failure\n", |
723 | __func__); | |
1673f1f0 CH |
724 | return -ENODEV; |
725 | } | |
726 | if (id->ncap == 0) { | |
727 | kfree(id); | |
728 | return -ENODEV; | |
729 | } | |
730 | ||
731 | if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) { | |
732 | if (nvme_nvm_register(ns->queue, disk->disk_name)) { | |
1b3c47c1 | 733 | dev_warn(disk_to_dev(ns->disk), |
1673f1f0 CH |
734 | "%s: LightNVM init failure\n", __func__); |
735 | kfree(id); | |
736 | return -ENODEV; | |
737 | } | |
738 | ns->type = NVME_NS_LIGHTNVM; | |
739 | } | |
740 | ||
2b9b6e86 KB |
741 | if (ns->ctrl->vs >= NVME_VS(1, 1)) |
742 | memcpy(ns->eui, id->eui64, sizeof(ns->eui)); | |
743 | if (ns->ctrl->vs >= NVME_VS(1, 2)) | |
744 | memcpy(ns->uuid, id->nguid, sizeof(ns->uuid)); | |
745 | ||
1673f1f0 CH |
746 | old_ms = ns->ms; |
747 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; | |
748 | ns->lba_shift = id->lbaf[lbaf].ds; | |
749 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); | |
750 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); | |
751 | ||
752 | /* | |
753 | * If identify namespace failed, use default 512 byte block size so | |
754 | * block layer can use before failing read/write for 0 capacity. | |
755 | */ | |
756 | if (ns->lba_shift == 0) | |
757 | ns->lba_shift = 9; | |
758 | bs = 1 << ns->lba_shift; | |
1673f1f0 CH |
759 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ |
760 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? | |
761 | id->dps & NVME_NS_DPS_PI_MASK : 0; | |
762 | ||
763 | blk_mq_freeze_queue(disk->queue); | |
764 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || | |
765 | ns->ms != old_ms || | |
766 | bs != queue_logical_block_size(disk->queue) || | |
767 | (ns->ms && ns->ext))) | |
768 | blk_integrity_unregister(disk); | |
769 | ||
770 | ns->pi_type = pi_type; | |
771 | blk_queue_logical_block_size(ns->queue, bs); | |
772 | ||
4b9d5b15 | 773 | if (ns->ms && !blk_get_integrity(disk) && !ns->ext) |
1673f1f0 | 774 | nvme_init_integrity(ns); |
1673f1f0 CH |
775 | if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk)) |
776 | set_capacity(disk, 0); | |
777 | else | |
778 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); | |
779 | ||
780 | if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) | |
781 | nvme_config_discard(ns); | |
782 | blk_mq_unfreeze_queue(disk->queue); | |
783 | ||
784 | kfree(id); | |
785 | return 0; | |
786 | } | |
787 | ||
788 | static char nvme_pr_type(enum pr_type type) | |
789 | { | |
790 | switch (type) { | |
791 | case PR_WRITE_EXCLUSIVE: | |
792 | return 1; | |
793 | case PR_EXCLUSIVE_ACCESS: | |
794 | return 2; | |
795 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
796 | return 3; | |
797 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
798 | return 4; | |
799 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
800 | return 5; | |
801 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
802 | return 6; | |
803 | default: | |
804 | return 0; | |
805 | } | |
806 | }; | |
807 | ||
808 | static int nvme_pr_command(struct block_device *bdev, u32 cdw10, | |
809 | u64 key, u64 sa_key, u8 op) | |
810 | { | |
811 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
812 | struct nvme_command c; | |
813 | u8 data[16] = { 0, }; | |
814 | ||
815 | put_unaligned_le64(key, &data[0]); | |
816 | put_unaligned_le64(sa_key, &data[8]); | |
817 | ||
818 | memset(&c, 0, sizeof(c)); | |
819 | c.common.opcode = op; | |
820 | c.common.nsid = cpu_to_le32(ns->ns_id); | |
821 | c.common.cdw10[0] = cpu_to_le32(cdw10); | |
822 | ||
823 | return nvme_submit_sync_cmd(ns->queue, &c, data, 16); | |
824 | } | |
825 | ||
826 | static int nvme_pr_register(struct block_device *bdev, u64 old, | |
827 | u64 new, unsigned flags) | |
828 | { | |
829 | u32 cdw10; | |
830 | ||
831 | if (flags & ~PR_FL_IGNORE_KEY) | |
832 | return -EOPNOTSUPP; | |
833 | ||
834 | cdw10 = old ? 2 : 0; | |
835 | cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; | |
836 | cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ | |
837 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); | |
838 | } | |
839 | ||
840 | static int nvme_pr_reserve(struct block_device *bdev, u64 key, | |
841 | enum pr_type type, unsigned flags) | |
842 | { | |
843 | u32 cdw10; | |
844 | ||
845 | if (flags & ~PR_FL_IGNORE_KEY) | |
846 | return -EOPNOTSUPP; | |
847 | ||
848 | cdw10 = nvme_pr_type(type) << 8; | |
849 | cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); | |
850 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); | |
851 | } | |
852 | ||
853 | static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, | |
854 | enum pr_type type, bool abort) | |
855 | { | |
856 | u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; | |
857 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); | |
858 | } | |
859 | ||
860 | static int nvme_pr_clear(struct block_device *bdev, u64 key) | |
861 | { | |
8c0b3915 | 862 | u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
1673f1f0 CH |
863 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
864 | } | |
865 | ||
866 | static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
867 | { | |
868 | u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; | |
869 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); | |
870 | } | |
871 | ||
872 | static const struct pr_ops nvme_pr_ops = { | |
873 | .pr_register = nvme_pr_register, | |
874 | .pr_reserve = nvme_pr_reserve, | |
875 | .pr_release = nvme_pr_release, | |
876 | .pr_preempt = nvme_pr_preempt, | |
877 | .pr_clear = nvme_pr_clear, | |
878 | }; | |
879 | ||
5bae7f73 | 880 | static const struct block_device_operations nvme_fops = { |
1673f1f0 CH |
881 | .owner = THIS_MODULE, |
882 | .ioctl = nvme_ioctl, | |
883 | .compat_ioctl = nvme_compat_ioctl, | |
884 | .open = nvme_open, | |
885 | .release = nvme_release, | |
886 | .getgeo = nvme_getgeo, | |
887 | .revalidate_disk= nvme_revalidate_disk, | |
888 | .pr_ops = &nvme_pr_ops, | |
889 | }; | |
890 | ||
5fd4ce1b CH |
891 | static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
892 | { | |
893 | unsigned long timeout = | |
894 | ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; | |
895 | u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; | |
896 | int ret; | |
897 | ||
898 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
899 | if ((csts & NVME_CSTS_RDY) == bit) | |
900 | break; | |
901 | ||
902 | msleep(100); | |
903 | if (fatal_signal_pending(current)) | |
904 | return -EINTR; | |
905 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 906 | dev_err(ctrl->device, |
5fd4ce1b CH |
907 | "Device not ready; aborting %s\n", enabled ? |
908 | "initialisation" : "reset"); | |
909 | return -ENODEV; | |
910 | } | |
911 | } | |
912 | ||
913 | return ret; | |
914 | } | |
915 | ||
916 | /* | |
917 | * If the device has been passed off to us in an enabled state, just clear | |
918 | * the enabled bit. The spec says we should set the 'shutdown notification | |
919 | * bits', but doing so may cause the device to complete commands to the | |
920 | * admin queue ... and we don't know what memory that might be pointing at! | |
921 | */ | |
922 | int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
923 | { | |
924 | int ret; | |
925 | ||
926 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
927 | ctrl->ctrl_config &= ~NVME_CC_ENABLE; | |
928 | ||
929 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
930 | if (ret) | |
931 | return ret; | |
932 | return nvme_wait_ready(ctrl, cap, false); | |
933 | } | |
576d55d6 | 934 | EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
5fd4ce1b CH |
935 | |
936 | int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap) | |
937 | { | |
938 | /* | |
939 | * Default to a 4K page size, with the intention to update this | |
940 | * path in the future to accomodate architectures with differing | |
941 | * kernel and IO page sizes. | |
942 | */ | |
943 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12; | |
944 | int ret; | |
945 | ||
946 | if (page_shift < dev_page_min) { | |
1b3c47c1 | 947 | dev_err(ctrl->device, |
5fd4ce1b CH |
948 | "Minimum device page size %u too large for host (%u)\n", |
949 | 1 << dev_page_min, 1 << page_shift); | |
950 | return -ENODEV; | |
951 | } | |
952 | ||
953 | ctrl->page_size = 1 << page_shift; | |
954 | ||
955 | ctrl->ctrl_config = NVME_CC_CSS_NVM; | |
956 | ctrl->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; | |
957 | ctrl->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; | |
958 | ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; | |
959 | ctrl->ctrl_config |= NVME_CC_ENABLE; | |
960 | ||
961 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
962 | if (ret) | |
963 | return ret; | |
964 | return nvme_wait_ready(ctrl, cap, true); | |
965 | } | |
576d55d6 | 966 | EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
5fd4ce1b CH |
967 | |
968 | int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) | |
969 | { | |
970 | unsigned long timeout = SHUTDOWN_TIMEOUT + jiffies; | |
971 | u32 csts; | |
972 | int ret; | |
973 | ||
974 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; | |
975 | ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; | |
976 | ||
977 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); | |
978 | if (ret) | |
979 | return ret; | |
980 | ||
981 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { | |
982 | if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) | |
983 | break; | |
984 | ||
985 | msleep(100); | |
986 | if (fatal_signal_pending(current)) | |
987 | return -EINTR; | |
988 | if (time_after(jiffies, timeout)) { | |
1b3c47c1 | 989 | dev_err(ctrl->device, |
5fd4ce1b CH |
990 | "Device shutdown incomplete; abort shutdown\n"); |
991 | return -ENODEV; | |
992 | } | |
993 | } | |
994 | ||
995 | return ret; | |
996 | } | |
576d55d6 | 997 | EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
5fd4ce1b | 998 | |
da35825d CH |
999 | static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
1000 | struct request_queue *q) | |
1001 | { | |
1002 | if (ctrl->max_hw_sectors) { | |
45686b61 CH |
1003 | u32 max_segments = |
1004 | (ctrl->max_hw_sectors / (ctrl->page_size >> 9)) + 1; | |
1005 | ||
da35825d | 1006 | blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
45686b61 | 1007 | blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
da35825d CH |
1008 | } |
1009 | if (ctrl->stripe_size) | |
1010 | blk_queue_chunk_sectors(q, ctrl->stripe_size >> 9); | |
1011 | if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) | |
1012 | blk_queue_flush(q, REQ_FLUSH | REQ_FUA); | |
1013 | blk_queue_virt_boundary(q, ctrl->page_size - 1); | |
1014 | } | |
1015 | ||
7fd8930f CH |
1016 | /* |
1017 | * Initialize the cached copies of the Identify data and various controller | |
1018 | * register in our nvme_ctrl structure. This should be called as soon as | |
1019 | * the admin queue is fully up and running. | |
1020 | */ | |
1021 | int nvme_init_identify(struct nvme_ctrl *ctrl) | |
1022 | { | |
1023 | struct nvme_id_ctrl *id; | |
1024 | u64 cap; | |
1025 | int ret, page_shift; | |
1026 | ||
f3ca80fc CH |
1027 | ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
1028 | if (ret) { | |
1b3c47c1 | 1029 | dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
f3ca80fc CH |
1030 | return ret; |
1031 | } | |
1032 | ||
7fd8930f CH |
1033 | ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &cap); |
1034 | if (ret) { | |
1b3c47c1 | 1035 | dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
7fd8930f CH |
1036 | return ret; |
1037 | } | |
1038 | page_shift = NVME_CAP_MPSMIN(cap) + 12; | |
1039 | ||
f3ca80fc CH |
1040 | if (ctrl->vs >= NVME_VS(1, 1)) |
1041 | ctrl->subsystem = NVME_CAP_NSSRC(cap); | |
1042 | ||
7fd8930f CH |
1043 | ret = nvme_identify_ctrl(ctrl, &id); |
1044 | if (ret) { | |
1b3c47c1 | 1045 | dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
7fd8930f CH |
1046 | return -EIO; |
1047 | } | |
1048 | ||
118472ab | 1049 | ctrl->vid = le16_to_cpu(id->vid); |
7fd8930f | 1050 | ctrl->oncs = le16_to_cpup(&id->oncs); |
6bf25d16 | 1051 | atomic_set(&ctrl->abort_limit, id->acl + 1); |
7fd8930f | 1052 | ctrl->vwc = id->vwc; |
931e1c22 | 1053 | ctrl->cntlid = le16_to_cpup(&id->cntlid); |
7fd8930f CH |
1054 | memcpy(ctrl->serial, id->sn, sizeof(id->sn)); |
1055 | memcpy(ctrl->model, id->mn, sizeof(id->mn)); | |
1056 | memcpy(ctrl->firmware_rev, id->fr, sizeof(id->fr)); | |
1057 | if (id->mdts) | |
1058 | ctrl->max_hw_sectors = 1 << (id->mdts + page_shift - 9); | |
1059 | else | |
1060 | ctrl->max_hw_sectors = UINT_MAX; | |
1061 | ||
1062 | if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && id->vs[3]) { | |
1063 | unsigned int max_hw_sectors; | |
1064 | ||
1065 | ctrl->stripe_size = 1 << (id->vs[3] + page_shift); | |
1066 | max_hw_sectors = ctrl->stripe_size >> (page_shift - 9); | |
1067 | if (ctrl->max_hw_sectors) { | |
1068 | ctrl->max_hw_sectors = min(max_hw_sectors, | |
1069 | ctrl->max_hw_sectors); | |
1070 | } else { | |
1071 | ctrl->max_hw_sectors = max_hw_sectors; | |
1072 | } | |
1073 | } | |
1074 | ||
da35825d CH |
1075 | nvme_set_queue_limits(ctrl, ctrl->admin_q); |
1076 | ||
7fd8930f CH |
1077 | kfree(id); |
1078 | return 0; | |
1079 | } | |
576d55d6 | 1080 | EXPORT_SYMBOL_GPL(nvme_init_identify); |
7fd8930f | 1081 | |
f3ca80fc | 1082 | static int nvme_dev_open(struct inode *inode, struct file *file) |
1673f1f0 | 1083 | { |
f3ca80fc CH |
1084 | struct nvme_ctrl *ctrl; |
1085 | int instance = iminor(inode); | |
1086 | int ret = -ENODEV; | |
1673f1f0 | 1087 | |
f3ca80fc CH |
1088 | spin_lock(&dev_list_lock); |
1089 | list_for_each_entry(ctrl, &nvme_ctrl_list, node) { | |
1090 | if (ctrl->instance != instance) | |
1091 | continue; | |
1092 | ||
1093 | if (!ctrl->admin_q) { | |
1094 | ret = -EWOULDBLOCK; | |
1095 | break; | |
1096 | } | |
1097 | if (!kref_get_unless_zero(&ctrl->kref)) | |
1098 | break; | |
1099 | file->private_data = ctrl; | |
1100 | ret = 0; | |
1101 | break; | |
1102 | } | |
1103 | spin_unlock(&dev_list_lock); | |
1104 | ||
1105 | return ret; | |
1673f1f0 CH |
1106 | } |
1107 | ||
f3ca80fc | 1108 | static int nvme_dev_release(struct inode *inode, struct file *file) |
1673f1f0 | 1109 | { |
f3ca80fc CH |
1110 | nvme_put_ctrl(file->private_data); |
1111 | return 0; | |
1112 | } | |
1113 | ||
bfd89471 CH |
1114 | static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
1115 | { | |
1116 | struct nvme_ns *ns; | |
1117 | int ret; | |
1118 | ||
1119 | mutex_lock(&ctrl->namespaces_mutex); | |
1120 | if (list_empty(&ctrl->namespaces)) { | |
1121 | ret = -ENOTTY; | |
1122 | goto out_unlock; | |
1123 | } | |
1124 | ||
1125 | ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); | |
1126 | if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { | |
1b3c47c1 | 1127 | dev_warn(ctrl->device, |
bfd89471 CH |
1128 | "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
1129 | ret = -EINVAL; | |
1130 | goto out_unlock; | |
1131 | } | |
1132 | ||
1b3c47c1 | 1133 | dev_warn(ctrl->device, |
bfd89471 CH |
1134 | "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
1135 | kref_get(&ns->kref); | |
1136 | mutex_unlock(&ctrl->namespaces_mutex); | |
1137 | ||
1138 | ret = nvme_user_cmd(ctrl, ns, argp); | |
1139 | nvme_put_ns(ns); | |
1140 | return ret; | |
1141 | ||
1142 | out_unlock: | |
1143 | mutex_unlock(&ctrl->namespaces_mutex); | |
1144 | return ret; | |
1145 | } | |
1146 | ||
f3ca80fc CH |
1147 | static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
1148 | unsigned long arg) | |
1149 | { | |
1150 | struct nvme_ctrl *ctrl = file->private_data; | |
1151 | void __user *argp = (void __user *)arg; | |
f3ca80fc CH |
1152 | |
1153 | switch (cmd) { | |
1154 | case NVME_IOCTL_ADMIN_CMD: | |
1155 | return nvme_user_cmd(ctrl, NULL, argp); | |
1156 | case NVME_IOCTL_IO_CMD: | |
bfd89471 | 1157 | return nvme_dev_user_cmd(ctrl, argp); |
f3ca80fc | 1158 | case NVME_IOCTL_RESET: |
1b3c47c1 | 1159 | dev_warn(ctrl->device, "resetting controller\n"); |
f3ca80fc CH |
1160 | return ctrl->ops->reset_ctrl(ctrl); |
1161 | case NVME_IOCTL_SUBSYS_RESET: | |
1162 | return nvme_reset_subsystem(ctrl); | |
1163 | default: | |
1164 | return -ENOTTY; | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | static const struct file_operations nvme_dev_fops = { | |
1169 | .owner = THIS_MODULE, | |
1170 | .open = nvme_dev_open, | |
1171 | .release = nvme_dev_release, | |
1172 | .unlocked_ioctl = nvme_dev_ioctl, | |
1173 | .compat_ioctl = nvme_dev_ioctl, | |
1174 | }; | |
1175 | ||
1176 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
1177 | struct device_attribute *attr, const char *buf, | |
1178 | size_t count) | |
1179 | { | |
1180 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
1181 | int ret; | |
1182 | ||
1183 | ret = ctrl->ops->reset_ctrl(ctrl); | |
1184 | if (ret < 0) | |
1185 | return ret; | |
1186 | return count; | |
1673f1f0 | 1187 | } |
f3ca80fc | 1188 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
1673f1f0 | 1189 | |
118472ab KB |
1190 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
1191 | char *buf) | |
1192 | { | |
1193 | struct nvme_ns *ns = dev_to_disk(dev)->private_data; | |
1194 | struct nvme_ctrl *ctrl = ns->ctrl; | |
1195 | int serial_len = sizeof(ctrl->serial); | |
1196 | int model_len = sizeof(ctrl->model); | |
1197 | ||
1198 | if (memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1199 | return sprintf(buf, "eui.%16phN\n", ns->uuid); | |
1200 | ||
1201 | if (memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1202 | return sprintf(buf, "eui.%8phN\n", ns->eui); | |
1203 | ||
1204 | while (ctrl->serial[serial_len - 1] == ' ') | |
1205 | serial_len--; | |
1206 | while (ctrl->model[model_len - 1] == ' ') | |
1207 | model_len--; | |
1208 | ||
1209 | return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", ctrl->vid, | |
1210 | serial_len, ctrl->serial, model_len, ctrl->model, ns->ns_id); | |
1211 | } | |
1212 | static DEVICE_ATTR(wwid, S_IRUGO, wwid_show, NULL); | |
1213 | ||
2b9b6e86 KB |
1214 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
1215 | char *buf) | |
1216 | { | |
1217 | struct nvme_ns *ns = dev_to_disk(dev)->private_data; | |
1218 | return sprintf(buf, "%pU\n", ns->uuid); | |
1219 | } | |
1220 | static DEVICE_ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
1221 | ||
1222 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, | |
1223 | char *buf) | |
1224 | { | |
1225 | struct nvme_ns *ns = dev_to_disk(dev)->private_data; | |
1226 | return sprintf(buf, "%8phd\n", ns->eui); | |
1227 | } | |
1228 | static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL); | |
1229 | ||
1230 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, | |
1231 | char *buf) | |
1232 | { | |
1233 | struct nvme_ns *ns = dev_to_disk(dev)->private_data; | |
1234 | return sprintf(buf, "%d\n", ns->ns_id); | |
1235 | } | |
1236 | static DEVICE_ATTR(nsid, S_IRUGO, nsid_show, NULL); | |
1237 | ||
1238 | static struct attribute *nvme_ns_attrs[] = { | |
118472ab | 1239 | &dev_attr_wwid.attr, |
2b9b6e86 KB |
1240 | &dev_attr_uuid.attr, |
1241 | &dev_attr_eui.attr, | |
1242 | &dev_attr_nsid.attr, | |
1243 | NULL, | |
1244 | }; | |
1245 | ||
1246 | static umode_t nvme_attrs_are_visible(struct kobject *kobj, | |
1247 | struct attribute *a, int n) | |
1248 | { | |
1249 | struct device *dev = container_of(kobj, struct device, kobj); | |
1250 | struct nvme_ns *ns = dev_to_disk(dev)->private_data; | |
1251 | ||
1252 | if (a == &dev_attr_uuid.attr) { | |
1253 | if (!memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) | |
1254 | return 0; | |
1255 | } | |
1256 | if (a == &dev_attr_eui.attr) { | |
1257 | if (!memchr_inv(ns->eui, 0, sizeof(ns->eui))) | |
1258 | return 0; | |
1259 | } | |
1260 | return a->mode; | |
1261 | } | |
1262 | ||
1263 | static const struct attribute_group nvme_ns_attr_group = { | |
1264 | .attrs = nvme_ns_attrs, | |
1265 | .is_visible = nvme_attrs_are_visible, | |
1266 | }; | |
1267 | ||
931e1c22 | 1268 | #define nvme_show_str_function(field) \ |
779ff756 KB |
1269 | static ssize_t field##_show(struct device *dev, \ |
1270 | struct device_attribute *attr, char *buf) \ | |
1271 | { \ | |
1272 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1273 | return sprintf(buf, "%.*s\n", (int)sizeof(ctrl->field), ctrl->field); \ | |
1274 | } \ | |
1275 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1276 | ||
931e1c22 ML |
1277 | #define nvme_show_int_function(field) \ |
1278 | static ssize_t field##_show(struct device *dev, \ | |
1279 | struct device_attribute *attr, char *buf) \ | |
1280 | { \ | |
1281 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
1282 | return sprintf(buf, "%d\n", ctrl->field); \ | |
1283 | } \ | |
1284 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
1285 | ||
1286 | nvme_show_str_function(model); | |
1287 | nvme_show_str_function(serial); | |
1288 | nvme_show_str_function(firmware_rev); | |
1289 | nvme_show_int_function(cntlid); | |
779ff756 KB |
1290 | |
1291 | static struct attribute *nvme_dev_attrs[] = { | |
1292 | &dev_attr_reset_controller.attr, | |
1293 | &dev_attr_model.attr, | |
1294 | &dev_attr_serial.attr, | |
1295 | &dev_attr_firmware_rev.attr, | |
931e1c22 | 1296 | &dev_attr_cntlid.attr, |
779ff756 KB |
1297 | NULL |
1298 | }; | |
1299 | ||
1300 | static struct attribute_group nvme_dev_attrs_group = { | |
1301 | .attrs = nvme_dev_attrs, | |
1302 | }; | |
1303 | ||
1304 | static const struct attribute_group *nvme_dev_attr_groups[] = { | |
1305 | &nvme_dev_attrs_group, | |
1306 | NULL, | |
1307 | }; | |
1308 | ||
5bae7f73 CH |
1309 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
1310 | { | |
1311 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); | |
1312 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); | |
1313 | ||
1314 | return nsa->ns_id - nsb->ns_id; | |
1315 | } | |
1316 | ||
1317 | static struct nvme_ns *nvme_find_ns(struct nvme_ctrl *ctrl, unsigned nsid) | |
1318 | { | |
1319 | struct nvme_ns *ns; | |
1320 | ||
69d3b8ac CH |
1321 | lockdep_assert_held(&ctrl->namespaces_mutex); |
1322 | ||
5bae7f73 CH |
1323 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
1324 | if (ns->ns_id == nsid) | |
1325 | return ns; | |
1326 | if (ns->ns_id > nsid) | |
1327 | break; | |
1328 | } | |
1329 | return NULL; | |
1330 | } | |
1331 | ||
1332 | static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) | |
1333 | { | |
1334 | struct nvme_ns *ns; | |
1335 | struct gendisk *disk; | |
1336 | int node = dev_to_node(ctrl->dev); | |
1337 | ||
69d3b8ac CH |
1338 | lockdep_assert_held(&ctrl->namespaces_mutex); |
1339 | ||
5bae7f73 CH |
1340 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
1341 | if (!ns) | |
1342 | return; | |
1343 | ||
075790eb KB |
1344 | ns->instance = ida_simple_get(&ctrl->ns_ida, 1, 0, GFP_KERNEL); |
1345 | if (ns->instance < 0) | |
1346 | goto out_free_ns; | |
1347 | ||
5bae7f73 CH |
1348 | ns->queue = blk_mq_init_queue(ctrl->tagset); |
1349 | if (IS_ERR(ns->queue)) | |
075790eb | 1350 | goto out_release_instance; |
5bae7f73 CH |
1351 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); |
1352 | ns->queue->queuedata = ns; | |
1353 | ns->ctrl = ctrl; | |
1354 | ||
1355 | disk = alloc_disk_node(0, node); | |
1356 | if (!disk) | |
1357 | goto out_free_queue; | |
1358 | ||
1359 | kref_init(&ns->kref); | |
1360 | ns->ns_id = nsid; | |
1361 | ns->disk = disk; | |
1362 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ | |
5bae7f73 | 1363 | |
da35825d | 1364 | |
5bae7f73 | 1365 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
da35825d | 1366 | nvme_set_queue_limits(ctrl, ns->queue); |
5bae7f73 CH |
1367 | |
1368 | disk->major = nvme_major; | |
1369 | disk->first_minor = 0; | |
1370 | disk->fops = &nvme_fops; | |
1371 | disk->private_data = ns; | |
1372 | disk->queue = ns->queue; | |
1373 | disk->driverfs_dev = ctrl->device; | |
1374 | disk->flags = GENHD_FL_EXT_DEVT; | |
075790eb | 1375 | sprintf(disk->disk_name, "nvme%dn%d", ctrl->instance, ns->instance); |
5bae7f73 | 1376 | |
5bae7f73 CH |
1377 | if (nvme_revalidate_disk(ns->disk)) |
1378 | goto out_free_disk; | |
1379 | ||
4b9d5b15 | 1380 | list_add_tail(&ns->list, &ctrl->namespaces); |
5bae7f73 | 1381 | kref_get(&ctrl->kref); |
2b9b6e86 KB |
1382 | if (ns->type == NVME_NS_LIGHTNVM) |
1383 | return; | |
5bae7f73 | 1384 | |
2b9b6e86 KB |
1385 | add_disk(ns->disk); |
1386 | if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, | |
1387 | &nvme_ns_attr_group)) | |
1388 | pr_warn("%s: failed to create sysfs group for identification\n", | |
1389 | ns->disk->disk_name); | |
5bae7f73 CH |
1390 | return; |
1391 | out_free_disk: | |
1392 | kfree(disk); | |
5bae7f73 CH |
1393 | out_free_queue: |
1394 | blk_cleanup_queue(ns->queue); | |
075790eb KB |
1395 | out_release_instance: |
1396 | ida_simple_remove(&ctrl->ns_ida, ns->instance); | |
5bae7f73 CH |
1397 | out_free_ns: |
1398 | kfree(ns); | |
1399 | } | |
1400 | ||
1401 | static void nvme_ns_remove(struct nvme_ns *ns) | |
1402 | { | |
646017a6 KB |
1403 | if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
1404 | return; | |
69d3b8ac | 1405 | |
5bae7f73 CH |
1406 | if (ns->disk->flags & GENHD_FL_UP) { |
1407 | if (blk_get_integrity(ns->disk)) | |
1408 | blk_integrity_unregister(ns->disk); | |
2b9b6e86 KB |
1409 | sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, |
1410 | &nvme_ns_attr_group); | |
5bae7f73 | 1411 | del_gendisk(ns->disk); |
5bae7f73 CH |
1412 | blk_mq_abort_requeue_list(ns->queue); |
1413 | blk_cleanup_queue(ns->queue); | |
1414 | } | |
646017a6 | 1415 | mutex_lock(&ns->ctrl->namespaces_mutex); |
5bae7f73 | 1416 | list_del_init(&ns->list); |
646017a6 | 1417 | mutex_unlock(&ns->ctrl->namespaces_mutex); |
5bae7f73 CH |
1418 | nvme_put_ns(ns); |
1419 | } | |
1420 | ||
540c801c KB |
1421 | static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
1422 | { | |
1423 | struct nvme_ns *ns; | |
1424 | ||
1425 | ns = nvme_find_ns(ctrl, nsid); | |
1426 | if (ns) { | |
1427 | if (revalidate_disk(ns->disk)) | |
1428 | nvme_ns_remove(ns); | |
1429 | } else | |
1430 | nvme_alloc_ns(ctrl, nsid); | |
1431 | } | |
1432 | ||
1433 | static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn) | |
1434 | { | |
1435 | struct nvme_ns *ns; | |
1436 | __le32 *ns_list; | |
1437 | unsigned i, j, nsid, prev = 0, num_lists = DIV_ROUND_UP(nn, 1024); | |
1438 | int ret = 0; | |
1439 | ||
1440 | ns_list = kzalloc(0x1000, GFP_KERNEL); | |
1441 | if (!ns_list) | |
1442 | return -ENOMEM; | |
1443 | ||
1444 | for (i = 0; i < num_lists; i++) { | |
1445 | ret = nvme_identify_ns_list(ctrl, prev, ns_list); | |
1446 | if (ret) | |
1447 | goto out; | |
1448 | ||
1449 | for (j = 0; j < min(nn, 1024U); j++) { | |
1450 | nsid = le32_to_cpu(ns_list[j]); | |
1451 | if (!nsid) | |
1452 | goto out; | |
1453 | ||
1454 | nvme_validate_ns(ctrl, nsid); | |
1455 | ||
1456 | while (++prev < nsid) { | |
1457 | ns = nvme_find_ns(ctrl, prev); | |
1458 | if (ns) | |
1459 | nvme_ns_remove(ns); | |
1460 | } | |
1461 | } | |
1462 | nn -= j; | |
1463 | } | |
1464 | out: | |
1465 | kfree(ns_list); | |
1466 | return ret; | |
1467 | } | |
1468 | ||
5bae7f73 CH |
1469 | static void __nvme_scan_namespaces(struct nvme_ctrl *ctrl, unsigned nn) |
1470 | { | |
1471 | struct nvme_ns *ns, *next; | |
1472 | unsigned i; | |
1473 | ||
69d3b8ac CH |
1474 | lockdep_assert_held(&ctrl->namespaces_mutex); |
1475 | ||
540c801c KB |
1476 | for (i = 1; i <= nn; i++) |
1477 | nvme_validate_ns(ctrl, i); | |
1478 | ||
5bae7f73 CH |
1479 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { |
1480 | if (ns->ns_id > nn) | |
1481 | nvme_ns_remove(ns); | |
1482 | } | |
5bae7f73 CH |
1483 | } |
1484 | ||
1485 | void nvme_scan_namespaces(struct nvme_ctrl *ctrl) | |
1486 | { | |
1487 | struct nvme_id_ctrl *id; | |
540c801c | 1488 | unsigned nn; |
5bae7f73 CH |
1489 | |
1490 | if (nvme_identify_ctrl(ctrl, &id)) | |
1491 | return; | |
540c801c | 1492 | |
69d3b8ac | 1493 | mutex_lock(&ctrl->namespaces_mutex); |
540c801c KB |
1494 | nn = le32_to_cpu(id->nn); |
1495 | if (ctrl->vs >= NVME_VS(1, 1) && | |
1496 | !(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) { | |
1497 | if (!nvme_scan_ns_list(ctrl, nn)) | |
1498 | goto done; | |
1499 | } | |
5bae7f73 | 1500 | __nvme_scan_namespaces(ctrl, le32_to_cpup(&id->nn)); |
540c801c KB |
1501 | done: |
1502 | list_sort(NULL, &ctrl->namespaces, ns_cmp); | |
69d3b8ac | 1503 | mutex_unlock(&ctrl->namespaces_mutex); |
5bae7f73 CH |
1504 | kfree(id); |
1505 | } | |
576d55d6 | 1506 | EXPORT_SYMBOL_GPL(nvme_scan_namespaces); |
5bae7f73 CH |
1507 | |
1508 | void nvme_remove_namespaces(struct nvme_ctrl *ctrl) | |
1509 | { | |
1510 | struct nvme_ns *ns, *next; | |
1511 | ||
1512 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) | |
1513 | nvme_ns_remove(ns); | |
1514 | } | |
576d55d6 | 1515 | EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
5bae7f73 | 1516 | |
f3ca80fc CH |
1517 | static DEFINE_IDA(nvme_instance_ida); |
1518 | ||
1519 | static int nvme_set_instance(struct nvme_ctrl *ctrl) | |
1520 | { | |
1521 | int instance, error; | |
1522 | ||
1523 | do { | |
1524 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) | |
1525 | return -ENODEV; | |
1526 | ||
1527 | spin_lock(&dev_list_lock); | |
1528 | error = ida_get_new(&nvme_instance_ida, &instance); | |
1529 | spin_unlock(&dev_list_lock); | |
1530 | } while (error == -EAGAIN); | |
1531 | ||
1532 | if (error) | |
1533 | return -ENODEV; | |
1534 | ||
1535 | ctrl->instance = instance; | |
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | static void nvme_release_instance(struct nvme_ctrl *ctrl) | |
1540 | { | |
1541 | spin_lock(&dev_list_lock); | |
1542 | ida_remove(&nvme_instance_ida, ctrl->instance); | |
1543 | spin_unlock(&dev_list_lock); | |
1544 | } | |
1545 | ||
53029b04 | 1546 | void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
576d55d6 | 1547 | { |
53029b04 | 1548 | device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance)); |
f3ca80fc CH |
1549 | |
1550 | spin_lock(&dev_list_lock); | |
1551 | list_del(&ctrl->node); | |
1552 | spin_unlock(&dev_list_lock); | |
53029b04 | 1553 | } |
576d55d6 | 1554 | EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
53029b04 KB |
1555 | |
1556 | static void nvme_free_ctrl(struct kref *kref) | |
1557 | { | |
1558 | struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref); | |
f3ca80fc CH |
1559 | |
1560 | put_device(ctrl->device); | |
1561 | nvme_release_instance(ctrl); | |
075790eb | 1562 | ida_destroy(&ctrl->ns_ida); |
f3ca80fc CH |
1563 | |
1564 | ctrl->ops->free_ctrl(ctrl); | |
1565 | } | |
1566 | ||
1567 | void nvme_put_ctrl(struct nvme_ctrl *ctrl) | |
1568 | { | |
1569 | kref_put(&ctrl->kref, nvme_free_ctrl); | |
1570 | } | |
576d55d6 | 1571 | EXPORT_SYMBOL_GPL(nvme_put_ctrl); |
f3ca80fc CH |
1572 | |
1573 | /* | |
1574 | * Initialize a NVMe controller structures. This needs to be called during | |
1575 | * earliest initialization so that we have the initialized structured around | |
1576 | * during probing. | |
1577 | */ | |
1578 | int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, | |
1579 | const struct nvme_ctrl_ops *ops, unsigned long quirks) | |
1580 | { | |
1581 | int ret; | |
1582 | ||
1583 | INIT_LIST_HEAD(&ctrl->namespaces); | |
69d3b8ac | 1584 | mutex_init(&ctrl->namespaces_mutex); |
f3ca80fc CH |
1585 | kref_init(&ctrl->kref); |
1586 | ctrl->dev = dev; | |
1587 | ctrl->ops = ops; | |
1588 | ctrl->quirks = quirks; | |
1589 | ||
1590 | ret = nvme_set_instance(ctrl); | |
1591 | if (ret) | |
1592 | goto out; | |
1593 | ||
779ff756 | 1594 | ctrl->device = device_create_with_groups(nvme_class, ctrl->dev, |
f3ca80fc | 1595 | MKDEV(nvme_char_major, ctrl->instance), |
f4f0f63e | 1596 | ctrl, nvme_dev_attr_groups, |
779ff756 | 1597 | "nvme%d", ctrl->instance); |
f3ca80fc CH |
1598 | if (IS_ERR(ctrl->device)) { |
1599 | ret = PTR_ERR(ctrl->device); | |
1600 | goto out_release_instance; | |
1601 | } | |
1602 | get_device(ctrl->device); | |
075790eb | 1603 | ida_init(&ctrl->ns_ida); |
f3ca80fc | 1604 | |
f3ca80fc CH |
1605 | spin_lock(&dev_list_lock); |
1606 | list_add_tail(&ctrl->node, &nvme_ctrl_list); | |
1607 | spin_unlock(&dev_list_lock); | |
1608 | ||
1609 | return 0; | |
f3ca80fc CH |
1610 | out_release_instance: |
1611 | nvme_release_instance(ctrl); | |
1612 | out: | |
1613 | return ret; | |
1614 | } | |
576d55d6 | 1615 | EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
f3ca80fc | 1616 | |
69d9a99c KB |
1617 | /** |
1618 | * nvme_kill_queues(): Ends all namespace queues | |
1619 | * @ctrl: the dead controller that needs to end | |
1620 | * | |
1621 | * Call this function when the driver determines it is unable to get the | |
1622 | * controller in a state capable of servicing IO. | |
1623 | */ | |
1624 | void nvme_kill_queues(struct nvme_ctrl *ctrl) | |
1625 | { | |
1626 | struct nvme_ns *ns; | |
1627 | ||
1628 | mutex_lock(&ctrl->namespaces_mutex); | |
1629 | list_for_each_entry(ns, &ctrl->namespaces, list) { | |
1630 | if (!kref_get_unless_zero(&ns->kref)) | |
1631 | continue; | |
1632 | ||
1633 | /* | |
1634 | * Revalidating a dead namespace sets capacity to 0. This will | |
1635 | * end buffered writers dirtying pages that can't be synced. | |
1636 | */ | |
1637 | if (!test_and_set_bit(NVME_NS_DEAD, &ns->flags)) | |
1638 | revalidate_disk(ns->disk); | |
1639 | ||
1640 | blk_set_queue_dying(ns->queue); | |
1641 | blk_mq_abort_requeue_list(ns->queue); | |
1642 | blk_mq_start_stopped_hw_queues(ns->queue, true); | |
1643 | ||
1644 | nvme_put_ns(ns); | |
1645 | } | |
1646 | mutex_unlock(&ctrl->namespaces_mutex); | |
1647 | } | |
237045fc | 1648 | EXPORT_SYMBOL_GPL(nvme_kill_queues); |
69d9a99c | 1649 | |
25646264 | 1650 | void nvme_stop_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
1651 | { |
1652 | struct nvme_ns *ns; | |
1653 | ||
69d3b8ac | 1654 | mutex_lock(&ctrl->namespaces_mutex); |
363c9aac | 1655 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
363c9aac SG |
1656 | spin_lock_irq(ns->queue->queue_lock); |
1657 | queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); | |
1658 | spin_unlock_irq(ns->queue->queue_lock); | |
1659 | ||
1660 | blk_mq_cancel_requeue_work(ns->queue); | |
1661 | blk_mq_stop_hw_queues(ns->queue); | |
1662 | } | |
69d3b8ac | 1663 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 1664 | } |
576d55d6 | 1665 | EXPORT_SYMBOL_GPL(nvme_stop_queues); |
363c9aac | 1666 | |
25646264 | 1667 | void nvme_start_queues(struct nvme_ctrl *ctrl) |
363c9aac SG |
1668 | { |
1669 | struct nvme_ns *ns; | |
1670 | ||
69d3b8ac | 1671 | mutex_lock(&ctrl->namespaces_mutex); |
363c9aac SG |
1672 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
1673 | queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); | |
363c9aac SG |
1674 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
1675 | blk_mq_kick_requeue_list(ns->queue); | |
1676 | } | |
69d3b8ac | 1677 | mutex_unlock(&ctrl->namespaces_mutex); |
363c9aac | 1678 | } |
576d55d6 | 1679 | EXPORT_SYMBOL_GPL(nvme_start_queues); |
363c9aac | 1680 | |
5bae7f73 CH |
1681 | int __init nvme_core_init(void) |
1682 | { | |
1683 | int result; | |
1684 | ||
1685 | result = register_blkdev(nvme_major, "nvme"); | |
1686 | if (result < 0) | |
1687 | return result; | |
1688 | else if (result > 0) | |
1689 | nvme_major = result; | |
1690 | ||
f3ca80fc CH |
1691 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
1692 | &nvme_dev_fops); | |
1693 | if (result < 0) | |
1694 | goto unregister_blkdev; | |
1695 | else if (result > 0) | |
1696 | nvme_char_major = result; | |
1697 | ||
1698 | nvme_class = class_create(THIS_MODULE, "nvme"); | |
1699 | if (IS_ERR(nvme_class)) { | |
1700 | result = PTR_ERR(nvme_class); | |
1701 | goto unregister_chrdev; | |
1702 | } | |
1703 | ||
5bae7f73 | 1704 | return 0; |
f3ca80fc CH |
1705 | |
1706 | unregister_chrdev: | |
1707 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
1708 | unregister_blkdev: | |
1709 | unregister_blkdev(nvme_major, "nvme"); | |
1710 | return result; | |
5bae7f73 CH |
1711 | } |
1712 | ||
1713 | void nvme_core_exit(void) | |
1714 | { | |
1715 | unregister_blkdev(nvme_major, "nvme"); | |
f3ca80fc CH |
1716 | class_destroy(nvme_class); |
1717 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
5bae7f73 | 1718 | } |
576d55d6 ML |
1719 | |
1720 | MODULE_LICENSE("GPL"); | |
1721 | MODULE_VERSION("1.0"); | |
1722 | module_init(nvme_core_init); | |
1723 | module_exit(nvme_core_exit); |