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b60503ba MW |
1 | /* |
2 | * NVM Express device driver | |
6eb0d698 | 3 | * Copyright (c) 2011-2014, Intel Corporation. |
b60503ba MW |
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. | |
b60503ba MW |
13 | */ |
14 | ||
15 | #include <linux/nvme.h> | |
8de05535 | 16 | #include <linux/bitops.h> |
b60503ba | 17 | #include <linux/blkdev.h> |
a4aea562 | 18 | #include <linux/blk-mq.h> |
42f61420 | 19 | #include <linux/cpu.h> |
fd63e9ce | 20 | #include <linux/delay.h> |
b60503ba MW |
21 | #include <linux/errno.h> |
22 | #include <linux/fs.h> | |
23 | #include <linux/genhd.h> | |
4cc09e2d | 24 | #include <linux/hdreg.h> |
5aff9382 | 25 | #include <linux/idr.h> |
b60503ba MW |
26 | #include <linux/init.h> |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/io.h> | |
29 | #include <linux/kdev_t.h> | |
1fa6aead | 30 | #include <linux/kthread.h> |
b60503ba | 31 | #include <linux/kernel.h> |
a5768aa8 | 32 | #include <linux/list_sort.h> |
b60503ba MW |
33 | #include <linux/mm.h> |
34 | #include <linux/module.h> | |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/pci.h> | |
be7b6275 | 37 | #include <linux/poison.h> |
c3bfe717 | 38 | #include <linux/ptrace.h> |
b60503ba MW |
39 | #include <linux/sched.h> |
40 | #include <linux/slab.h> | |
e1e5e564 | 41 | #include <linux/t10-pi.h> |
b60503ba | 42 | #include <linux/types.h> |
5d0f6131 | 43 | #include <scsi/sg.h> |
797a796a HM |
44 | #include <asm-generic/io-64-nonatomic-lo-hi.h> |
45 | ||
b3fffdef | 46 | #define NVME_MINORS (1U << MINORBITS) |
9d43cf64 | 47 | #define NVME_Q_DEPTH 1024 |
d31af0a3 | 48 | #define NVME_AQ_DEPTH 256 |
b60503ba MW |
49 | #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) |
50 | #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) | |
9d43cf64 | 51 | #define ADMIN_TIMEOUT (admin_timeout * HZ) |
2484f407 | 52 | #define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ) |
9d43cf64 KB |
53 | |
54 | static unsigned char admin_timeout = 60; | |
55 | module_param(admin_timeout, byte, 0644); | |
56 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); | |
b60503ba | 57 | |
bd67608a MW |
58 | unsigned char nvme_io_timeout = 30; |
59 | module_param_named(io_timeout, nvme_io_timeout, byte, 0644); | |
b355084a | 60 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); |
b60503ba | 61 | |
2484f407 DM |
62 | static unsigned char shutdown_timeout = 5; |
63 | module_param(shutdown_timeout, byte, 0644); | |
64 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); | |
65 | ||
b60503ba MW |
66 | static int nvme_major; |
67 | module_param(nvme_major, int, 0); | |
68 | ||
b3fffdef KB |
69 | static int nvme_char_major; |
70 | module_param(nvme_char_major, int, 0); | |
71 | ||
58ffacb5 MW |
72 | static int use_threaded_interrupts; |
73 | module_param(use_threaded_interrupts, int, 0); | |
74 | ||
1fa6aead MW |
75 | static DEFINE_SPINLOCK(dev_list_lock); |
76 | static LIST_HEAD(dev_list); | |
77 | static struct task_struct *nvme_thread; | |
9a6b9458 | 78 | static struct workqueue_struct *nvme_workq; |
b9afca3e | 79 | static wait_queue_head_t nvme_kthread_wait; |
1fa6aead | 80 | |
b3fffdef KB |
81 | static struct class *nvme_class; |
82 | ||
d4b4ff8e | 83 | static void nvme_reset_failed_dev(struct work_struct *ws); |
4cc06521 | 84 | static int nvme_reset(struct nvme_dev *dev); |
a4aea562 | 85 | static int nvme_process_cq(struct nvme_queue *nvmeq); |
d4b4ff8e | 86 | |
4d115420 KB |
87 | struct async_cmd_info { |
88 | struct kthread_work work; | |
89 | struct kthread_worker *worker; | |
a4aea562 | 90 | struct request *req; |
4d115420 KB |
91 | u32 result; |
92 | int status; | |
93 | void *ctx; | |
94 | }; | |
1fa6aead | 95 | |
b60503ba MW |
96 | /* |
97 | * An NVM Express queue. Each device has at least two (one for admin | |
98 | * commands and one for I/O commands). | |
99 | */ | |
100 | struct nvme_queue { | |
101 | struct device *q_dmadev; | |
091b6092 | 102 | struct nvme_dev *dev; |
3193f07b | 103 | char irqname[24]; /* nvme4294967295-65535\0 */ |
b60503ba MW |
104 | spinlock_t q_lock; |
105 | struct nvme_command *sq_cmds; | |
106 | volatile struct nvme_completion *cqes; | |
42483228 | 107 | struct blk_mq_tags **tags; |
b60503ba MW |
108 | dma_addr_t sq_dma_addr; |
109 | dma_addr_t cq_dma_addr; | |
b60503ba MW |
110 | u32 __iomem *q_db; |
111 | u16 q_depth; | |
6222d172 | 112 | s16 cq_vector; |
b60503ba MW |
113 | u16 sq_head; |
114 | u16 sq_tail; | |
115 | u16 cq_head; | |
c30341dc | 116 | u16 qid; |
e9539f47 MW |
117 | u8 cq_phase; |
118 | u8 cqe_seen; | |
4d115420 | 119 | struct async_cmd_info cmdinfo; |
b60503ba MW |
120 | }; |
121 | ||
122 | /* | |
123 | * Check we didin't inadvertently grow the command struct | |
124 | */ | |
125 | static inline void _nvme_check_size(void) | |
126 | { | |
127 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); | |
128 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); | |
129 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); | |
130 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); | |
131 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); | |
f8ebf840 | 132 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
c30341dc | 133 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
b60503ba MW |
134 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
135 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); | |
136 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); | |
137 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); | |
6ecec745 | 138 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
b60503ba MW |
139 | } |
140 | ||
edd10d33 | 141 | typedef void (*nvme_completion_fn)(struct nvme_queue *, void *, |
c2f5b650 MW |
142 | struct nvme_completion *); |
143 | ||
e85248e5 | 144 | struct nvme_cmd_info { |
c2f5b650 MW |
145 | nvme_completion_fn fn; |
146 | void *ctx; | |
c30341dc | 147 | int aborted; |
a4aea562 | 148 | struct nvme_queue *nvmeq; |
ac3dd5bd | 149 | struct nvme_iod iod[0]; |
e85248e5 MW |
150 | }; |
151 | ||
ac3dd5bd JA |
152 | /* |
153 | * Max size of iod being embedded in the request payload | |
154 | */ | |
155 | #define NVME_INT_PAGES 2 | |
156 | #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->page_size) | |
fda631ff | 157 | #define NVME_INT_MASK 0x01 |
ac3dd5bd JA |
158 | |
159 | /* | |
160 | * Will slightly overestimate the number of pages needed. This is OK | |
161 | * as it only leads to a small amount of wasted memory for the lifetime of | |
162 | * the I/O. | |
163 | */ | |
164 | static int nvme_npages(unsigned size, struct nvme_dev *dev) | |
165 | { | |
166 | unsigned nprps = DIV_ROUND_UP(size + dev->page_size, dev->page_size); | |
167 | return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); | |
168 | } | |
169 | ||
170 | static unsigned int nvme_cmd_size(struct nvme_dev *dev) | |
171 | { | |
172 | unsigned int ret = sizeof(struct nvme_cmd_info); | |
173 | ||
174 | ret += sizeof(struct nvme_iod); | |
175 | ret += sizeof(__le64 *) * nvme_npages(NVME_INT_BYTES(dev), dev); | |
176 | ret += sizeof(struct scatterlist) * NVME_INT_PAGES; | |
177 | ||
178 | return ret; | |
179 | } | |
180 | ||
a4aea562 MB |
181 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
182 | unsigned int hctx_idx) | |
e85248e5 | 183 | { |
a4aea562 MB |
184 | struct nvme_dev *dev = data; |
185 | struct nvme_queue *nvmeq = dev->queues[0]; | |
186 | ||
42483228 KB |
187 | WARN_ON(hctx_idx != 0); |
188 | WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); | |
189 | WARN_ON(nvmeq->tags); | |
190 | ||
a4aea562 | 191 | hctx->driver_data = nvmeq; |
42483228 | 192 | nvmeq->tags = &dev->admin_tagset.tags[0]; |
a4aea562 | 193 | return 0; |
e85248e5 MW |
194 | } |
195 | ||
a4aea562 MB |
196 | static int nvme_admin_init_request(void *data, struct request *req, |
197 | unsigned int hctx_idx, unsigned int rq_idx, | |
198 | unsigned int numa_node) | |
22404274 | 199 | { |
a4aea562 MB |
200 | struct nvme_dev *dev = data; |
201 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
202 | struct nvme_queue *nvmeq = dev->queues[0]; | |
203 | ||
204 | BUG_ON(!nvmeq); | |
205 | cmd->nvmeq = nvmeq; | |
206 | return 0; | |
22404274 KB |
207 | } |
208 | ||
a4aea562 MB |
209 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
210 | unsigned int hctx_idx) | |
b60503ba | 211 | { |
a4aea562 | 212 | struct nvme_dev *dev = data; |
42483228 | 213 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
a4aea562 | 214 | |
42483228 KB |
215 | if (!nvmeq->tags) |
216 | nvmeq->tags = &dev->tagset.tags[hctx_idx]; | |
b60503ba | 217 | |
42483228 | 218 | WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); |
a4aea562 MB |
219 | hctx->driver_data = nvmeq; |
220 | return 0; | |
b60503ba MW |
221 | } |
222 | ||
a4aea562 MB |
223 | static int nvme_init_request(void *data, struct request *req, |
224 | unsigned int hctx_idx, unsigned int rq_idx, | |
225 | unsigned int numa_node) | |
b60503ba | 226 | { |
a4aea562 MB |
227 | struct nvme_dev *dev = data; |
228 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
229 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; | |
230 | ||
231 | BUG_ON(!nvmeq); | |
232 | cmd->nvmeq = nvmeq; | |
233 | return 0; | |
234 | } | |
235 | ||
236 | static void nvme_set_info(struct nvme_cmd_info *cmd, void *ctx, | |
237 | nvme_completion_fn handler) | |
238 | { | |
239 | cmd->fn = handler; | |
240 | cmd->ctx = ctx; | |
241 | cmd->aborted = 0; | |
c917dfe5 | 242 | blk_mq_start_request(blk_mq_rq_from_pdu(cmd)); |
b60503ba MW |
243 | } |
244 | ||
ac3dd5bd JA |
245 | static void *iod_get_private(struct nvme_iod *iod) |
246 | { | |
247 | return (void *) (iod->private & ~0x1UL); | |
248 | } | |
249 | ||
250 | /* | |
251 | * If bit 0 is set, the iod is embedded in the request payload. | |
252 | */ | |
253 | static bool iod_should_kfree(struct nvme_iod *iod) | |
254 | { | |
fda631ff | 255 | return (iod->private & NVME_INT_MASK) == 0; |
ac3dd5bd JA |
256 | } |
257 | ||
c2f5b650 MW |
258 | /* Special values must be less than 0x1000 */ |
259 | #define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) | |
d2d87034 MW |
260 | #define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) |
261 | #define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) | |
262 | #define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) | |
be7b6275 | 263 | |
edd10d33 | 264 | static void special_completion(struct nvme_queue *nvmeq, void *ctx, |
c2f5b650 MW |
265 | struct nvme_completion *cqe) |
266 | { | |
267 | if (ctx == CMD_CTX_CANCELLED) | |
268 | return; | |
c2f5b650 | 269 | if (ctx == CMD_CTX_COMPLETED) { |
edd10d33 | 270 | dev_warn(nvmeq->q_dmadev, |
c2f5b650 MW |
271 | "completed id %d twice on queue %d\n", |
272 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); | |
273 | return; | |
274 | } | |
275 | if (ctx == CMD_CTX_INVALID) { | |
edd10d33 | 276 | dev_warn(nvmeq->q_dmadev, |
c2f5b650 MW |
277 | "invalid id %d completed on queue %d\n", |
278 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); | |
279 | return; | |
280 | } | |
edd10d33 | 281 | dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); |
c2f5b650 MW |
282 | } |
283 | ||
a4aea562 | 284 | static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn) |
b60503ba | 285 | { |
c2f5b650 | 286 | void *ctx; |
b60503ba | 287 | |
859361a2 | 288 | if (fn) |
a4aea562 MB |
289 | *fn = cmd->fn; |
290 | ctx = cmd->ctx; | |
291 | cmd->fn = special_completion; | |
292 | cmd->ctx = CMD_CTX_CANCELLED; | |
c2f5b650 | 293 | return ctx; |
b60503ba MW |
294 | } |
295 | ||
a4aea562 MB |
296 | static void async_req_completion(struct nvme_queue *nvmeq, void *ctx, |
297 | struct nvme_completion *cqe) | |
3c0cf138 | 298 | { |
a4aea562 MB |
299 | u32 result = le32_to_cpup(&cqe->result); |
300 | u16 status = le16_to_cpup(&cqe->status) >> 1; | |
301 | ||
302 | if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) | |
303 | ++nvmeq->dev->event_limit; | |
a5768aa8 KB |
304 | if (status != NVME_SC_SUCCESS) |
305 | return; | |
306 | ||
307 | switch (result & 0xff07) { | |
308 | case NVME_AER_NOTICE_NS_CHANGED: | |
309 | dev_info(nvmeq->q_dmadev, "rescanning\n"); | |
310 | schedule_work(&nvmeq->dev->scan_work); | |
311 | default: | |
312 | dev_warn(nvmeq->q_dmadev, "async event result %08x\n", result); | |
313 | } | |
b60503ba MW |
314 | } |
315 | ||
a4aea562 MB |
316 | static void abort_completion(struct nvme_queue *nvmeq, void *ctx, |
317 | struct nvme_completion *cqe) | |
5a92e700 | 318 | { |
a4aea562 MB |
319 | struct request *req = ctx; |
320 | ||
321 | u16 status = le16_to_cpup(&cqe->status) >> 1; | |
322 | u32 result = le32_to_cpup(&cqe->result); | |
a51afb54 | 323 | |
42483228 | 324 | blk_mq_free_request(req); |
a51afb54 | 325 | |
a4aea562 MB |
326 | dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); |
327 | ++nvmeq->dev->abort_limit; | |
5a92e700 KB |
328 | } |
329 | ||
a4aea562 MB |
330 | static void async_completion(struct nvme_queue *nvmeq, void *ctx, |
331 | struct nvme_completion *cqe) | |
b60503ba | 332 | { |
a4aea562 MB |
333 | struct async_cmd_info *cmdinfo = ctx; |
334 | cmdinfo->result = le32_to_cpup(&cqe->result); | |
335 | cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; | |
336 | queue_kthread_work(cmdinfo->worker, &cmdinfo->work); | |
42483228 | 337 | blk_mq_free_request(cmdinfo->req); |
b60503ba MW |
338 | } |
339 | ||
a4aea562 MB |
340 | static inline struct nvme_cmd_info *get_cmd_from_tag(struct nvme_queue *nvmeq, |
341 | unsigned int tag) | |
b60503ba | 342 | { |
42483228 | 343 | struct request *req = blk_mq_tag_to_rq(*nvmeq->tags, tag); |
a51afb54 | 344 | |
a4aea562 | 345 | return blk_mq_rq_to_pdu(req); |
4f5099af KB |
346 | } |
347 | ||
a4aea562 MB |
348 | /* |
349 | * Called with local interrupts disabled and the q_lock held. May not sleep. | |
350 | */ | |
351 | static void *nvme_finish_cmd(struct nvme_queue *nvmeq, int tag, | |
352 | nvme_completion_fn *fn) | |
4f5099af | 353 | { |
a4aea562 MB |
354 | struct nvme_cmd_info *cmd = get_cmd_from_tag(nvmeq, tag); |
355 | void *ctx; | |
356 | if (tag >= nvmeq->q_depth) { | |
357 | *fn = special_completion; | |
358 | return CMD_CTX_INVALID; | |
359 | } | |
360 | if (fn) | |
361 | *fn = cmd->fn; | |
362 | ctx = cmd->ctx; | |
363 | cmd->fn = special_completion; | |
364 | cmd->ctx = CMD_CTX_COMPLETED; | |
365 | return ctx; | |
b60503ba MW |
366 | } |
367 | ||
368 | /** | |
714a7a22 | 369 | * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell |
b60503ba MW |
370 | * @nvmeq: The queue to use |
371 | * @cmd: The command to send | |
372 | * | |
373 | * Safe to use from interrupt context | |
374 | */ | |
a4aea562 | 375 | static int __nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) |
b60503ba | 376 | { |
a4aea562 MB |
377 | u16 tail = nvmeq->sq_tail; |
378 | ||
b60503ba | 379 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); |
b60503ba MW |
380 | if (++tail == nvmeq->q_depth) |
381 | tail = 0; | |
7547881d | 382 | writel(tail, nvmeq->q_db); |
b60503ba | 383 | nvmeq->sq_tail = tail; |
b60503ba MW |
384 | |
385 | return 0; | |
386 | } | |
387 | ||
a4aea562 MB |
388 | static int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) |
389 | { | |
390 | unsigned long flags; | |
391 | int ret; | |
392 | spin_lock_irqsave(&nvmeq->q_lock, flags); | |
393 | ret = __nvme_submit_cmd(nvmeq, cmd); | |
394 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); | |
395 | return ret; | |
396 | } | |
397 | ||
eca18b23 | 398 | static __le64 **iod_list(struct nvme_iod *iod) |
e025344c | 399 | { |
eca18b23 | 400 | return ((void *)iod) + iod->offset; |
e025344c SMM |
401 | } |
402 | ||
ac3dd5bd JA |
403 | static inline void iod_init(struct nvme_iod *iod, unsigned nbytes, |
404 | unsigned nseg, unsigned long private) | |
eca18b23 | 405 | { |
ac3dd5bd JA |
406 | iod->private = private; |
407 | iod->offset = offsetof(struct nvme_iod, sg[nseg]); | |
408 | iod->npages = -1; | |
409 | iod->length = nbytes; | |
410 | iod->nents = 0; | |
eca18b23 | 411 | } |
b60503ba | 412 | |
eca18b23 | 413 | static struct nvme_iod * |
ac3dd5bd JA |
414 | __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev, |
415 | unsigned long priv, gfp_t gfp) | |
b60503ba | 416 | { |
eca18b23 | 417 | struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + |
ac3dd5bd | 418 | sizeof(__le64 *) * nvme_npages(bytes, dev) + |
eca18b23 MW |
419 | sizeof(struct scatterlist) * nseg, gfp); |
420 | ||
ac3dd5bd JA |
421 | if (iod) |
422 | iod_init(iod, bytes, nseg, priv); | |
eca18b23 MW |
423 | |
424 | return iod; | |
b60503ba MW |
425 | } |
426 | ||
ac3dd5bd JA |
427 | static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev, |
428 | gfp_t gfp) | |
429 | { | |
430 | unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) : | |
431 | sizeof(struct nvme_dsm_range); | |
ac3dd5bd JA |
432 | struct nvme_iod *iod; |
433 | ||
434 | if (rq->nr_phys_segments <= NVME_INT_PAGES && | |
435 | size <= NVME_INT_BYTES(dev)) { | |
436 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq); | |
437 | ||
438 | iod = cmd->iod; | |
ac3dd5bd | 439 | iod_init(iod, size, rq->nr_phys_segments, |
fda631ff | 440 | (unsigned long) rq | NVME_INT_MASK); |
ac3dd5bd JA |
441 | return iod; |
442 | } | |
443 | ||
444 | return __nvme_alloc_iod(rq->nr_phys_segments, size, dev, | |
445 | (unsigned long) rq, gfp); | |
446 | } | |
447 | ||
d29ec824 | 448 | static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) |
b60503ba | 449 | { |
1d090624 | 450 | const int last_prp = dev->page_size / 8 - 1; |
eca18b23 MW |
451 | int i; |
452 | __le64 **list = iod_list(iod); | |
453 | dma_addr_t prp_dma = iod->first_dma; | |
454 | ||
455 | if (iod->npages == 0) | |
456 | dma_pool_free(dev->prp_small_pool, list[0], prp_dma); | |
457 | for (i = 0; i < iod->npages; i++) { | |
458 | __le64 *prp_list = list[i]; | |
459 | dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); | |
460 | dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); | |
461 | prp_dma = next_prp_dma; | |
462 | } | |
ac3dd5bd JA |
463 | |
464 | if (iod_should_kfree(iod)) | |
465 | kfree(iod); | |
b60503ba MW |
466 | } |
467 | ||
b4ff9c8d KB |
468 | static int nvme_error_status(u16 status) |
469 | { | |
470 | switch (status & 0x7ff) { | |
471 | case NVME_SC_SUCCESS: | |
472 | return 0; | |
473 | case NVME_SC_CAP_EXCEEDED: | |
474 | return -ENOSPC; | |
475 | default: | |
476 | return -EIO; | |
477 | } | |
478 | } | |
479 | ||
52b68d7e | 480 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
e1e5e564 KB |
481 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
482 | { | |
483 | if (be32_to_cpu(pi->ref_tag) == v) | |
484 | pi->ref_tag = cpu_to_be32(p); | |
485 | } | |
486 | ||
487 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
488 | { | |
489 | if (be32_to_cpu(pi->ref_tag) == p) | |
490 | pi->ref_tag = cpu_to_be32(v); | |
491 | } | |
492 | ||
493 | /** | |
494 | * nvme_dif_remap - remaps ref tags to bip seed and physical lba | |
495 | * | |
496 | * The virtual start sector is the one that was originally submitted by the | |
497 | * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical | |
498 | * start sector may be different. Remap protection information to match the | |
499 | * physical LBA on writes, and back to the original seed on reads. | |
500 | * | |
501 | * Type 0 and 3 do not have a ref tag, so no remapping required. | |
502 | */ | |
503 | static void nvme_dif_remap(struct request *req, | |
504 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
505 | { | |
506 | struct nvme_ns *ns = req->rq_disk->private_data; | |
507 | struct bio_integrity_payload *bip; | |
508 | struct t10_pi_tuple *pi; | |
509 | void *p, *pmap; | |
510 | u32 i, nlb, ts, phys, virt; | |
511 | ||
512 | if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) | |
513 | return; | |
514 | ||
515 | bip = bio_integrity(req->bio); | |
516 | if (!bip) | |
517 | return; | |
518 | ||
519 | pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; | |
e1e5e564 KB |
520 | |
521 | p = pmap; | |
522 | virt = bip_get_seed(bip); | |
523 | phys = nvme_block_nr(ns, blk_rq_pos(req)); | |
524 | nlb = (blk_rq_bytes(req) >> ns->lba_shift); | |
525 | ts = ns->disk->integrity->tuple_size; | |
526 | ||
527 | for (i = 0; i < nlb; i++, virt++, phys++) { | |
528 | pi = (struct t10_pi_tuple *)p; | |
529 | dif_swap(phys, virt, pi); | |
530 | p += ts; | |
531 | } | |
532 | kunmap_atomic(pmap); | |
533 | } | |
534 | ||
52b68d7e KB |
535 | static int nvme_noop_verify(struct blk_integrity_iter *iter) |
536 | { | |
537 | return 0; | |
538 | } | |
539 | ||
540 | static int nvme_noop_generate(struct blk_integrity_iter *iter) | |
541 | { | |
542 | return 0; | |
543 | } | |
544 | ||
545 | struct blk_integrity nvme_meta_noop = { | |
546 | .name = "NVME_META_NOOP", | |
547 | .generate_fn = nvme_noop_generate, | |
548 | .verify_fn = nvme_noop_verify, | |
549 | }; | |
550 | ||
551 | static void nvme_init_integrity(struct nvme_ns *ns) | |
552 | { | |
553 | struct blk_integrity integrity; | |
554 | ||
555 | switch (ns->pi_type) { | |
556 | case NVME_NS_DPS_PI_TYPE3: | |
557 | integrity = t10_pi_type3_crc; | |
558 | break; | |
559 | case NVME_NS_DPS_PI_TYPE1: | |
560 | case NVME_NS_DPS_PI_TYPE2: | |
561 | integrity = t10_pi_type1_crc; | |
562 | break; | |
563 | default: | |
564 | integrity = nvme_meta_noop; | |
565 | break; | |
566 | } | |
567 | integrity.tuple_size = ns->ms; | |
568 | blk_integrity_register(ns->disk, &integrity); | |
569 | blk_queue_max_integrity_segments(ns->queue, 1); | |
570 | } | |
571 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
572 | static void nvme_dif_remap(struct request *req, | |
573 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
574 | { | |
575 | } | |
576 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) | |
577 | { | |
578 | } | |
579 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
580 | { | |
581 | } | |
582 | static void nvme_init_integrity(struct nvme_ns *ns) | |
583 | { | |
584 | } | |
585 | #endif | |
586 | ||
a4aea562 | 587 | static void req_completion(struct nvme_queue *nvmeq, void *ctx, |
b60503ba MW |
588 | struct nvme_completion *cqe) |
589 | { | |
eca18b23 | 590 | struct nvme_iod *iod = ctx; |
ac3dd5bd | 591 | struct request *req = iod_get_private(iod); |
a4aea562 MB |
592 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
593 | ||
b60503ba MW |
594 | u16 status = le16_to_cpup(&cqe->status) >> 1; |
595 | ||
edd10d33 | 596 | if (unlikely(status)) { |
a4aea562 MB |
597 | if (!(status & NVME_SC_DNR || blk_noretry_request(req)) |
598 | && (jiffies - req->start_time) < req->timeout) { | |
c9d3bf88 KB |
599 | unsigned long flags; |
600 | ||
a4aea562 | 601 | blk_mq_requeue_request(req); |
c9d3bf88 KB |
602 | spin_lock_irqsave(req->q->queue_lock, flags); |
603 | if (!blk_queue_stopped(req->q)) | |
604 | blk_mq_kick_requeue_list(req->q); | |
605 | spin_unlock_irqrestore(req->q->queue_lock, flags); | |
edd10d33 KB |
606 | return; |
607 | } | |
d29ec824 | 608 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) { |
d29ec824 CH |
609 | req->errors = status; |
610 | } else { | |
611 | req->errors = nvme_error_status(status); | |
612 | } | |
a4aea562 MB |
613 | } else |
614 | req->errors = 0; | |
a0a931d6 KB |
615 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) { |
616 | u32 result = le32_to_cpup(&cqe->result); | |
617 | req->special = (void *)(uintptr_t)result; | |
618 | } | |
a4aea562 MB |
619 | |
620 | if (cmd_rq->aborted) | |
e75ec752 | 621 | dev_warn(nvmeq->dev->dev, |
a4aea562 MB |
622 | "completing aborted command with status:%04x\n", |
623 | status); | |
624 | ||
e1e5e564 | 625 | if (iod->nents) { |
e75ec752 | 626 | dma_unmap_sg(nvmeq->dev->dev, iod->sg, iod->nents, |
a4aea562 | 627 | rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
e1e5e564 KB |
628 | if (blk_integrity_rq(req)) { |
629 | if (!rq_data_dir(req)) | |
630 | nvme_dif_remap(req, nvme_dif_complete); | |
e75ec752 | 631 | dma_unmap_sg(nvmeq->dev->dev, iod->meta_sg, 1, |
e1e5e564 KB |
632 | rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
633 | } | |
634 | } | |
edd10d33 | 635 | nvme_free_iod(nvmeq->dev, iod); |
3291fa57 | 636 | |
a4aea562 | 637 | blk_mq_complete_request(req); |
b60503ba MW |
638 | } |
639 | ||
184d2944 | 640 | /* length is in bytes. gfp flags indicates whether we may sleep. */ |
d29ec824 CH |
641 | static int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, |
642 | int total_len, gfp_t gfp) | |
ff22b54f | 643 | { |
99802a7a | 644 | struct dma_pool *pool; |
eca18b23 MW |
645 | int length = total_len; |
646 | struct scatterlist *sg = iod->sg; | |
ff22b54f MW |
647 | int dma_len = sg_dma_len(sg); |
648 | u64 dma_addr = sg_dma_address(sg); | |
f137e0f1 MI |
649 | u32 page_size = dev->page_size; |
650 | int offset = dma_addr & (page_size - 1); | |
e025344c | 651 | __le64 *prp_list; |
eca18b23 | 652 | __le64 **list = iod_list(iod); |
e025344c | 653 | dma_addr_t prp_dma; |
eca18b23 | 654 | int nprps, i; |
ff22b54f | 655 | |
1d090624 | 656 | length -= (page_size - offset); |
ff22b54f | 657 | if (length <= 0) |
eca18b23 | 658 | return total_len; |
ff22b54f | 659 | |
1d090624 | 660 | dma_len -= (page_size - offset); |
ff22b54f | 661 | if (dma_len) { |
1d090624 | 662 | dma_addr += (page_size - offset); |
ff22b54f MW |
663 | } else { |
664 | sg = sg_next(sg); | |
665 | dma_addr = sg_dma_address(sg); | |
666 | dma_len = sg_dma_len(sg); | |
667 | } | |
668 | ||
1d090624 | 669 | if (length <= page_size) { |
edd10d33 | 670 | iod->first_dma = dma_addr; |
eca18b23 | 671 | return total_len; |
e025344c SMM |
672 | } |
673 | ||
1d090624 | 674 | nprps = DIV_ROUND_UP(length, page_size); |
99802a7a MW |
675 | if (nprps <= (256 / 8)) { |
676 | pool = dev->prp_small_pool; | |
eca18b23 | 677 | iod->npages = 0; |
99802a7a MW |
678 | } else { |
679 | pool = dev->prp_page_pool; | |
eca18b23 | 680 | iod->npages = 1; |
99802a7a MW |
681 | } |
682 | ||
b77954cb MW |
683 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
684 | if (!prp_list) { | |
edd10d33 | 685 | iod->first_dma = dma_addr; |
eca18b23 | 686 | iod->npages = -1; |
1d090624 | 687 | return (total_len - length) + page_size; |
b77954cb | 688 | } |
eca18b23 MW |
689 | list[0] = prp_list; |
690 | iod->first_dma = prp_dma; | |
e025344c SMM |
691 | i = 0; |
692 | for (;;) { | |
1d090624 | 693 | if (i == page_size >> 3) { |
e025344c | 694 | __le64 *old_prp_list = prp_list; |
b77954cb | 695 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
eca18b23 MW |
696 | if (!prp_list) |
697 | return total_len - length; | |
698 | list[iod->npages++] = prp_list; | |
7523d834 MW |
699 | prp_list[0] = old_prp_list[i - 1]; |
700 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); | |
701 | i = 1; | |
e025344c SMM |
702 | } |
703 | prp_list[i++] = cpu_to_le64(dma_addr); | |
1d090624 KB |
704 | dma_len -= page_size; |
705 | dma_addr += page_size; | |
706 | length -= page_size; | |
e025344c SMM |
707 | if (length <= 0) |
708 | break; | |
709 | if (dma_len > 0) | |
710 | continue; | |
711 | BUG_ON(dma_len < 0); | |
712 | sg = sg_next(sg); | |
713 | dma_addr = sg_dma_address(sg); | |
714 | dma_len = sg_dma_len(sg); | |
ff22b54f MW |
715 | } |
716 | ||
eca18b23 | 717 | return total_len; |
ff22b54f MW |
718 | } |
719 | ||
d29ec824 CH |
720 | static void nvme_submit_priv(struct nvme_queue *nvmeq, struct request *req, |
721 | struct nvme_iod *iod) | |
722 | { | |
723 | struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; | |
724 | ||
725 | memcpy(cmnd, req->cmd, sizeof(struct nvme_command)); | |
726 | cmnd->rw.command_id = req->tag; | |
727 | if (req->nr_phys_segments) { | |
728 | cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); | |
729 | cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); | |
730 | } | |
731 | ||
732 | if (++nvmeq->sq_tail == nvmeq->q_depth) | |
733 | nvmeq->sq_tail = 0; | |
734 | writel(nvmeq->sq_tail, nvmeq->q_db); | |
735 | } | |
736 | ||
a4aea562 MB |
737 | /* |
738 | * We reuse the small pool to allocate the 16-byte range here as it is not | |
739 | * worth having a special pool for these or additional cases to handle freeing | |
740 | * the iod. | |
741 | */ | |
742 | static void nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, | |
743 | struct request *req, struct nvme_iod *iod) | |
0e5e4f0e | 744 | { |
edd10d33 KB |
745 | struct nvme_dsm_range *range = |
746 | (struct nvme_dsm_range *)iod_list(iod)[0]; | |
0e5e4f0e KB |
747 | struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; |
748 | ||
0e5e4f0e | 749 | range->cattr = cpu_to_le32(0); |
a4aea562 MB |
750 | range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); |
751 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
0e5e4f0e KB |
752 | |
753 | memset(cmnd, 0, sizeof(*cmnd)); | |
754 | cmnd->dsm.opcode = nvme_cmd_dsm; | |
a4aea562 | 755 | cmnd->dsm.command_id = req->tag; |
0e5e4f0e KB |
756 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); |
757 | cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); | |
758 | cmnd->dsm.nr = 0; | |
759 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); | |
760 | ||
761 | if (++nvmeq->sq_tail == nvmeq->q_depth) | |
762 | nvmeq->sq_tail = 0; | |
763 | writel(nvmeq->sq_tail, nvmeq->q_db); | |
0e5e4f0e KB |
764 | } |
765 | ||
a4aea562 | 766 | static void nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, |
00df5cb4 MW |
767 | int cmdid) |
768 | { | |
769 | struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; | |
770 | ||
771 | memset(cmnd, 0, sizeof(*cmnd)); | |
772 | cmnd->common.opcode = nvme_cmd_flush; | |
773 | cmnd->common.command_id = cmdid; | |
774 | cmnd->common.nsid = cpu_to_le32(ns->ns_id); | |
775 | ||
776 | if (++nvmeq->sq_tail == nvmeq->q_depth) | |
777 | nvmeq->sq_tail = 0; | |
778 | writel(nvmeq->sq_tail, nvmeq->q_db); | |
00df5cb4 MW |
779 | } |
780 | ||
a4aea562 MB |
781 | static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod, |
782 | struct nvme_ns *ns) | |
b60503ba | 783 | { |
ac3dd5bd | 784 | struct request *req = iod_get_private(iod); |
ff22b54f | 785 | struct nvme_command *cmnd; |
a4aea562 MB |
786 | u16 control = 0; |
787 | u32 dsmgmt = 0; | |
00df5cb4 | 788 | |
a4aea562 | 789 | if (req->cmd_flags & REQ_FUA) |
b60503ba | 790 | control |= NVME_RW_FUA; |
a4aea562 | 791 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
b60503ba MW |
792 | control |= NVME_RW_LR; |
793 | ||
a4aea562 | 794 | if (req->cmd_flags & REQ_RAHEAD) |
b60503ba MW |
795 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
796 | ||
ff22b54f | 797 | cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; |
b8deb62c | 798 | memset(cmnd, 0, sizeof(*cmnd)); |
b60503ba | 799 | |
a4aea562 MB |
800 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); |
801 | cmnd->rw.command_id = req->tag; | |
ff22b54f | 802 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); |
edd10d33 KB |
803 | cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
804 | cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); | |
a4aea562 MB |
805 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); |
806 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); | |
e1e5e564 KB |
807 | |
808 | if (blk_integrity_rq(req)) { | |
809 | cmnd->rw.metadata = cpu_to_le64(sg_dma_address(iod->meta_sg)); | |
810 | switch (ns->pi_type) { | |
811 | case NVME_NS_DPS_PI_TYPE3: | |
812 | control |= NVME_RW_PRINFO_PRCHK_GUARD; | |
813 | break; | |
814 | case NVME_NS_DPS_PI_TYPE1: | |
815 | case NVME_NS_DPS_PI_TYPE2: | |
816 | control |= NVME_RW_PRINFO_PRCHK_GUARD | | |
817 | NVME_RW_PRINFO_PRCHK_REF; | |
818 | cmnd->rw.reftag = cpu_to_le32( | |
819 | nvme_block_nr(ns, blk_rq_pos(req))); | |
820 | break; | |
821 | } | |
822 | } else if (ns->ms) | |
823 | control |= NVME_RW_PRINFO_PRACT; | |
824 | ||
ff22b54f MW |
825 | cmnd->rw.control = cpu_to_le16(control); |
826 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); | |
b60503ba | 827 | |
b60503ba MW |
828 | if (++nvmeq->sq_tail == nvmeq->q_depth) |
829 | nvmeq->sq_tail = 0; | |
7547881d | 830 | writel(nvmeq->sq_tail, nvmeq->q_db); |
b60503ba | 831 | |
1974b1ae | 832 | return 0; |
edd10d33 KB |
833 | } |
834 | ||
d29ec824 CH |
835 | /* |
836 | * NOTE: ns is NULL when called on the admin queue. | |
837 | */ | |
a4aea562 MB |
838 | static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
839 | const struct blk_mq_queue_data *bd) | |
edd10d33 | 840 | { |
a4aea562 MB |
841 | struct nvme_ns *ns = hctx->queue->queuedata; |
842 | struct nvme_queue *nvmeq = hctx->driver_data; | |
d29ec824 | 843 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 MB |
844 | struct request *req = bd->rq; |
845 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
edd10d33 | 846 | struct nvme_iod *iod; |
a4aea562 | 847 | enum dma_data_direction dma_dir; |
edd10d33 | 848 | |
e1e5e564 KB |
849 | /* |
850 | * If formated with metadata, require the block layer provide a buffer | |
851 | * unless this namespace is formated such that the metadata can be | |
852 | * stripped/generated by the controller with PRACT=1. | |
853 | */ | |
d29ec824 | 854 | if (ns && ns->ms && !blk_integrity_rq(req)) { |
e1e5e564 KB |
855 | if (!(ns->pi_type && ns->ms == 8)) { |
856 | req->errors = -EFAULT; | |
857 | blk_mq_complete_request(req); | |
858 | return BLK_MQ_RQ_QUEUE_OK; | |
859 | } | |
860 | } | |
861 | ||
d29ec824 | 862 | iod = nvme_alloc_iod(req, dev, GFP_ATOMIC); |
edd10d33 | 863 | if (!iod) |
fe54303e | 864 | return BLK_MQ_RQ_QUEUE_BUSY; |
a4aea562 | 865 | |
a4aea562 | 866 | if (req->cmd_flags & REQ_DISCARD) { |
edd10d33 KB |
867 | void *range; |
868 | /* | |
869 | * We reuse the small pool to allocate the 16-byte range here | |
870 | * as it is not worth having a special pool for these or | |
871 | * additional cases to handle freeing the iod. | |
872 | */ | |
d29ec824 | 873 | range = dma_pool_alloc(dev->prp_small_pool, GFP_ATOMIC, |
edd10d33 | 874 | &iod->first_dma); |
a4aea562 | 875 | if (!range) |
fe54303e | 876 | goto retry_cmd; |
edd10d33 KB |
877 | iod_list(iod)[0] = (__le64 *)range; |
878 | iod->npages = 0; | |
ac3dd5bd | 879 | } else if (req->nr_phys_segments) { |
a4aea562 MB |
880 | dma_dir = rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
881 | ||
ac3dd5bd | 882 | sg_init_table(iod->sg, req->nr_phys_segments); |
a4aea562 | 883 | iod->nents = blk_rq_map_sg(req->q, req, iod->sg); |
fe54303e JA |
884 | if (!iod->nents) |
885 | goto error_cmd; | |
a4aea562 MB |
886 | |
887 | if (!dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir)) | |
fe54303e | 888 | goto retry_cmd; |
a4aea562 | 889 | |
fe54303e | 890 | if (blk_rq_bytes(req) != |
d29ec824 CH |
891 | nvme_setup_prps(dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) { |
892 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
fe54303e JA |
893 | goto retry_cmd; |
894 | } | |
e1e5e564 KB |
895 | if (blk_integrity_rq(req)) { |
896 | if (blk_rq_count_integrity_sg(req->q, req->bio) != 1) | |
897 | goto error_cmd; | |
898 | ||
899 | sg_init_table(iod->meta_sg, 1); | |
900 | if (blk_rq_map_integrity_sg( | |
901 | req->q, req->bio, iod->meta_sg) != 1) | |
902 | goto error_cmd; | |
903 | ||
904 | if (rq_data_dir(req)) | |
905 | nvme_dif_remap(req, nvme_dif_prep); | |
906 | ||
907 | if (!dma_map_sg(nvmeq->q_dmadev, iod->meta_sg, 1, dma_dir)) | |
908 | goto error_cmd; | |
909 | } | |
edd10d33 | 910 | } |
1974b1ae | 911 | |
9af8785a | 912 | nvme_set_info(cmd, iod, req_completion); |
a4aea562 | 913 | spin_lock_irq(&nvmeq->q_lock); |
d29ec824 CH |
914 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) |
915 | nvme_submit_priv(nvmeq, req, iod); | |
916 | else if (req->cmd_flags & REQ_DISCARD) | |
a4aea562 MB |
917 | nvme_submit_discard(nvmeq, ns, req, iod); |
918 | else if (req->cmd_flags & REQ_FLUSH) | |
919 | nvme_submit_flush(nvmeq, ns, req->tag); | |
920 | else | |
921 | nvme_submit_iod(nvmeq, iod, ns); | |
922 | ||
923 | nvme_process_cq(nvmeq); | |
924 | spin_unlock_irq(&nvmeq->q_lock); | |
925 | return BLK_MQ_RQ_QUEUE_OK; | |
926 | ||
fe54303e | 927 | error_cmd: |
d29ec824 | 928 | nvme_free_iod(dev, iod); |
fe54303e JA |
929 | return BLK_MQ_RQ_QUEUE_ERROR; |
930 | retry_cmd: | |
d29ec824 | 931 | nvme_free_iod(dev, iod); |
fe54303e | 932 | return BLK_MQ_RQ_QUEUE_BUSY; |
b60503ba MW |
933 | } |
934 | ||
e9539f47 | 935 | static int nvme_process_cq(struct nvme_queue *nvmeq) |
b60503ba | 936 | { |
82123460 | 937 | u16 head, phase; |
b60503ba | 938 | |
b60503ba | 939 | head = nvmeq->cq_head; |
82123460 | 940 | phase = nvmeq->cq_phase; |
b60503ba MW |
941 | |
942 | for (;;) { | |
c2f5b650 MW |
943 | void *ctx; |
944 | nvme_completion_fn fn; | |
b60503ba | 945 | struct nvme_completion cqe = nvmeq->cqes[head]; |
82123460 | 946 | if ((le16_to_cpu(cqe.status) & 1) != phase) |
b60503ba MW |
947 | break; |
948 | nvmeq->sq_head = le16_to_cpu(cqe.sq_head); | |
949 | if (++head == nvmeq->q_depth) { | |
950 | head = 0; | |
82123460 | 951 | phase = !phase; |
b60503ba | 952 | } |
a4aea562 | 953 | ctx = nvme_finish_cmd(nvmeq, cqe.command_id, &fn); |
edd10d33 | 954 | fn(nvmeq, ctx, &cqe); |
b60503ba MW |
955 | } |
956 | ||
957 | /* If the controller ignores the cq head doorbell and continuously | |
958 | * writes to the queue, it is theoretically possible to wrap around | |
959 | * the queue twice and mistakenly return IRQ_NONE. Linux only | |
960 | * requires that 0.1% of your interrupts are handled, so this isn't | |
961 | * a big problem. | |
962 | */ | |
82123460 | 963 | if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) |
e9539f47 | 964 | return 0; |
b60503ba | 965 | |
b80d5ccc | 966 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); |
b60503ba | 967 | nvmeq->cq_head = head; |
82123460 | 968 | nvmeq->cq_phase = phase; |
b60503ba | 969 | |
e9539f47 MW |
970 | nvmeq->cqe_seen = 1; |
971 | return 1; | |
b60503ba MW |
972 | } |
973 | ||
974 | static irqreturn_t nvme_irq(int irq, void *data) | |
58ffacb5 MW |
975 | { |
976 | irqreturn_t result; | |
977 | struct nvme_queue *nvmeq = data; | |
978 | spin_lock(&nvmeq->q_lock); | |
e9539f47 MW |
979 | nvme_process_cq(nvmeq); |
980 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; | |
981 | nvmeq->cqe_seen = 0; | |
58ffacb5 MW |
982 | spin_unlock(&nvmeq->q_lock); |
983 | return result; | |
984 | } | |
985 | ||
986 | static irqreturn_t nvme_irq_check(int irq, void *data) | |
987 | { | |
988 | struct nvme_queue *nvmeq = data; | |
989 | struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; | |
990 | if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) | |
991 | return IRQ_NONE; | |
992 | return IRQ_WAKE_THREAD; | |
993 | } | |
994 | ||
b60503ba MW |
995 | /* |
996 | * Returns 0 on success. If the result is negative, it's a Linux error code; | |
997 | * if the result is positive, it's an NVM Express status code | |
998 | */ | |
d29ec824 CH |
999 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
1000 | void *buffer, void __user *ubuffer, unsigned bufflen, | |
1001 | u32 *result, unsigned timeout) | |
b60503ba | 1002 | { |
d29ec824 CH |
1003 | bool write = cmd->common.opcode & 1; |
1004 | struct bio *bio = NULL; | |
f705f837 | 1005 | struct request *req; |
d29ec824 | 1006 | int ret; |
f705f837 | 1007 | |
d29ec824 | 1008 | req = blk_mq_alloc_request(q, write, GFP_KERNEL, false); |
f705f837 CH |
1009 | if (IS_ERR(req)) |
1010 | return PTR_ERR(req); | |
b60503ba | 1011 | |
d29ec824 | 1012 | req->cmd_type = REQ_TYPE_DRV_PRIV; |
75619bfa | 1013 | req->cmd_flags = REQ_FAILFAST_DRIVER; |
d29ec824 CH |
1014 | req->__data_len = 0; |
1015 | req->__sector = (sector_t) -1; | |
1016 | req->bio = req->biotail = NULL; | |
b60503ba | 1017 | |
f4ff414a | 1018 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
a4aea562 | 1019 | |
d29ec824 CH |
1020 | req->cmd = (unsigned char *)cmd; |
1021 | req->cmd_len = sizeof(struct nvme_command); | |
a0a931d6 | 1022 | req->special = (void *)0; |
b60503ba | 1023 | |
d29ec824 CH |
1024 | if (buffer && bufflen) { |
1025 | ret = blk_rq_map_kern(q, req, buffer, bufflen, __GFP_WAIT); | |
1026 | if (ret) | |
1027 | goto out; | |
1028 | } else if (ubuffer && bufflen) { | |
1029 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, __GFP_WAIT); | |
1030 | if (ret) | |
1031 | goto out; | |
1032 | bio = req->bio; | |
1033 | } | |
3c0cf138 | 1034 | |
d29ec824 CH |
1035 | blk_execute_rq(req->q, NULL, req, 0); |
1036 | if (bio) | |
1037 | blk_rq_unmap_user(bio); | |
b60503ba | 1038 | if (result) |
a0a931d6 | 1039 | *result = (u32)(uintptr_t)req->special; |
d29ec824 CH |
1040 | ret = req->errors; |
1041 | out: | |
f705f837 | 1042 | blk_mq_free_request(req); |
d29ec824 | 1043 | return ret; |
f705f837 CH |
1044 | } |
1045 | ||
d29ec824 CH |
1046 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
1047 | void *buffer, unsigned bufflen) | |
f705f837 | 1048 | { |
d29ec824 | 1049 | return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0); |
b60503ba MW |
1050 | } |
1051 | ||
a4aea562 MB |
1052 | static int nvme_submit_async_admin_req(struct nvme_dev *dev) |
1053 | { | |
1054 | struct nvme_queue *nvmeq = dev->queues[0]; | |
1055 | struct nvme_command c; | |
1056 | struct nvme_cmd_info *cmd_info; | |
1057 | struct request *req; | |
1058 | ||
1efccc9d | 1059 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, true); |
9f173b33 DC |
1060 | if (IS_ERR(req)) |
1061 | return PTR_ERR(req); | |
a4aea562 | 1062 | |
c917dfe5 | 1063 | req->cmd_flags |= REQ_NO_TIMEOUT; |
a4aea562 | 1064 | cmd_info = blk_mq_rq_to_pdu(req); |
1efccc9d | 1065 | nvme_set_info(cmd_info, NULL, async_req_completion); |
a4aea562 MB |
1066 | |
1067 | memset(&c, 0, sizeof(c)); | |
1068 | c.common.opcode = nvme_admin_async_event; | |
1069 | c.common.command_id = req->tag; | |
1070 | ||
42483228 | 1071 | blk_mq_free_request(req); |
a4aea562 MB |
1072 | return __nvme_submit_cmd(nvmeq, &c); |
1073 | } | |
1074 | ||
1075 | static int nvme_submit_admin_async_cmd(struct nvme_dev *dev, | |
4d115420 KB |
1076 | struct nvme_command *cmd, |
1077 | struct async_cmd_info *cmdinfo, unsigned timeout) | |
1078 | { | |
a4aea562 MB |
1079 | struct nvme_queue *nvmeq = dev->queues[0]; |
1080 | struct request *req; | |
1081 | struct nvme_cmd_info *cmd_rq; | |
4d115420 | 1082 | |
a4aea562 | 1083 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_KERNEL, false); |
9f173b33 DC |
1084 | if (IS_ERR(req)) |
1085 | return PTR_ERR(req); | |
a4aea562 MB |
1086 | |
1087 | req->timeout = timeout; | |
1088 | cmd_rq = blk_mq_rq_to_pdu(req); | |
1089 | cmdinfo->req = req; | |
1090 | nvme_set_info(cmd_rq, cmdinfo, async_completion); | |
4d115420 | 1091 | cmdinfo->status = -EINTR; |
a4aea562 MB |
1092 | |
1093 | cmd->common.command_id = req->tag; | |
1094 | ||
4f5099af | 1095 | return nvme_submit_cmd(nvmeq, cmd); |
4d115420 KB |
1096 | } |
1097 | ||
b60503ba MW |
1098 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
1099 | { | |
b60503ba MW |
1100 | struct nvme_command c; |
1101 | ||
1102 | memset(&c, 0, sizeof(c)); | |
1103 | c.delete_queue.opcode = opcode; | |
1104 | c.delete_queue.qid = cpu_to_le16(id); | |
1105 | ||
d29ec824 | 1106 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1107 | } |
1108 | ||
1109 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, | |
1110 | struct nvme_queue *nvmeq) | |
1111 | { | |
b60503ba MW |
1112 | struct nvme_command c; |
1113 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; | |
1114 | ||
d29ec824 CH |
1115 | /* |
1116 | * Note: we (ab)use the fact the the prp fields survive if no data | |
1117 | * is attached to the request. | |
1118 | */ | |
b60503ba MW |
1119 | memset(&c, 0, sizeof(c)); |
1120 | c.create_cq.opcode = nvme_admin_create_cq; | |
1121 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); | |
1122 | c.create_cq.cqid = cpu_to_le16(qid); | |
1123 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1124 | c.create_cq.cq_flags = cpu_to_le16(flags); | |
1125 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); | |
1126 | ||
d29ec824 | 1127 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1128 | } |
1129 | ||
1130 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, | |
1131 | struct nvme_queue *nvmeq) | |
1132 | { | |
b60503ba MW |
1133 | struct nvme_command c; |
1134 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; | |
1135 | ||
d29ec824 CH |
1136 | /* |
1137 | * Note: we (ab)use the fact the the prp fields survive if no data | |
1138 | * is attached to the request. | |
1139 | */ | |
b60503ba MW |
1140 | memset(&c, 0, sizeof(c)); |
1141 | c.create_sq.opcode = nvme_admin_create_sq; | |
1142 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); | |
1143 | c.create_sq.sqid = cpu_to_le16(qid); | |
1144 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1145 | c.create_sq.sq_flags = cpu_to_le16(flags); | |
1146 | c.create_sq.cqid = cpu_to_le16(qid); | |
1147 | ||
d29ec824 | 1148 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1149 | } |
1150 | ||
1151 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) | |
1152 | { | |
1153 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); | |
1154 | } | |
1155 | ||
1156 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) | |
1157 | { | |
1158 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); | |
1159 | } | |
1160 | ||
d29ec824 | 1161 | int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id) |
bc5fc7e4 | 1162 | { |
d29ec824 CH |
1163 | struct nvme_command c = { |
1164 | .identify.opcode = nvme_admin_identify, | |
1165 | .identify.cns = cpu_to_le32(1), | |
1166 | }; | |
1167 | int error; | |
bc5fc7e4 | 1168 | |
d29ec824 CH |
1169 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); |
1170 | if (!*id) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
1174 | sizeof(struct nvme_id_ctrl)); | |
1175 | if (error) | |
1176 | kfree(*id); | |
1177 | return error; | |
1178 | } | |
1179 | ||
1180 | int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid, | |
1181 | struct nvme_id_ns **id) | |
1182 | { | |
1183 | struct nvme_command c = { | |
1184 | .identify.opcode = nvme_admin_identify, | |
1185 | .identify.nsid = cpu_to_le32(nsid), | |
1186 | }; | |
1187 | int error; | |
bc5fc7e4 | 1188 | |
d29ec824 CH |
1189 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); |
1190 | if (!*id) | |
1191 | return -ENOMEM; | |
1192 | ||
1193 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
1194 | sizeof(struct nvme_id_ns)); | |
1195 | if (error) | |
1196 | kfree(*id); | |
1197 | return error; | |
bc5fc7e4 MW |
1198 | } |
1199 | ||
5d0f6131 | 1200 | int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, |
08df1e05 | 1201 | dma_addr_t dma_addr, u32 *result) |
bc5fc7e4 MW |
1202 | { |
1203 | struct nvme_command c; | |
1204 | ||
1205 | memset(&c, 0, sizeof(c)); | |
1206 | c.features.opcode = nvme_admin_get_features; | |
a42cecce | 1207 | c.features.nsid = cpu_to_le32(nsid); |
bc5fc7e4 MW |
1208 | c.features.prp1 = cpu_to_le64(dma_addr); |
1209 | c.features.fid = cpu_to_le32(fid); | |
bc5fc7e4 | 1210 | |
d29ec824 CH |
1211 | return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, |
1212 | result, 0); | |
df348139 MW |
1213 | } |
1214 | ||
5d0f6131 VV |
1215 | int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, |
1216 | dma_addr_t dma_addr, u32 *result) | |
df348139 MW |
1217 | { |
1218 | struct nvme_command c; | |
1219 | ||
1220 | memset(&c, 0, sizeof(c)); | |
1221 | c.features.opcode = nvme_admin_set_features; | |
1222 | c.features.prp1 = cpu_to_le64(dma_addr); | |
1223 | c.features.fid = cpu_to_le32(fid); | |
1224 | c.features.dword11 = cpu_to_le32(dword11); | |
1225 | ||
d29ec824 CH |
1226 | return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, |
1227 | result, 0); | |
1228 | } | |
1229 | ||
1230 | int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log) | |
1231 | { | |
1232 | struct nvme_command c = { | |
1233 | .common.opcode = nvme_admin_get_log_page, | |
1234 | .common.nsid = cpu_to_le32(0xFFFFFFFF), | |
1235 | .common.cdw10[0] = cpu_to_le32( | |
1236 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | | |
1237 | NVME_LOG_SMART), | |
1238 | }; | |
1239 | int error; | |
1240 | ||
1241 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); | |
1242 | if (!*log) | |
1243 | return -ENOMEM; | |
1244 | ||
1245 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, | |
1246 | sizeof(struct nvme_smart_log)); | |
1247 | if (error) | |
1248 | kfree(*log); | |
1249 | return error; | |
bc5fc7e4 MW |
1250 | } |
1251 | ||
c30341dc | 1252 | /** |
a4aea562 | 1253 | * nvme_abort_req - Attempt aborting a request |
c30341dc KB |
1254 | * |
1255 | * Schedule controller reset if the command was already aborted once before and | |
1256 | * still hasn't been returned to the driver, or if this is the admin queue. | |
1257 | */ | |
a4aea562 | 1258 | static void nvme_abort_req(struct request *req) |
c30341dc | 1259 | { |
a4aea562 MB |
1260 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
1261 | struct nvme_queue *nvmeq = cmd_rq->nvmeq; | |
c30341dc | 1262 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 MB |
1263 | struct request *abort_req; |
1264 | struct nvme_cmd_info *abort_cmd; | |
1265 | struct nvme_command cmd; | |
c30341dc | 1266 | |
a4aea562 | 1267 | if (!nvmeq->qid || cmd_rq->aborted) { |
7a509a6b KB |
1268 | unsigned long flags; |
1269 | ||
1270 | spin_lock_irqsave(&dev_list_lock, flags); | |
c30341dc | 1271 | if (work_busy(&dev->reset_work)) |
7a509a6b | 1272 | goto out; |
c30341dc | 1273 | list_del_init(&dev->node); |
e75ec752 | 1274 | dev_warn(dev->dev, "I/O %d QID %d timeout, reset controller\n", |
a4aea562 | 1275 | req->tag, nvmeq->qid); |
9ca97374 | 1276 | dev->reset_workfn = nvme_reset_failed_dev; |
c30341dc | 1277 | queue_work(nvme_workq, &dev->reset_work); |
7a509a6b KB |
1278 | out: |
1279 | spin_unlock_irqrestore(&dev_list_lock, flags); | |
c30341dc KB |
1280 | return; |
1281 | } | |
1282 | ||
1283 | if (!dev->abort_limit) | |
1284 | return; | |
1285 | ||
a4aea562 MB |
1286 | abort_req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, |
1287 | false); | |
9f173b33 | 1288 | if (IS_ERR(abort_req)) |
c30341dc KB |
1289 | return; |
1290 | ||
a4aea562 MB |
1291 | abort_cmd = blk_mq_rq_to_pdu(abort_req); |
1292 | nvme_set_info(abort_cmd, abort_req, abort_completion); | |
1293 | ||
c30341dc KB |
1294 | memset(&cmd, 0, sizeof(cmd)); |
1295 | cmd.abort.opcode = nvme_admin_abort_cmd; | |
a4aea562 | 1296 | cmd.abort.cid = req->tag; |
c30341dc | 1297 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
a4aea562 | 1298 | cmd.abort.command_id = abort_req->tag; |
c30341dc KB |
1299 | |
1300 | --dev->abort_limit; | |
a4aea562 | 1301 | cmd_rq->aborted = 1; |
c30341dc | 1302 | |
a4aea562 | 1303 | dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", req->tag, |
c30341dc | 1304 | nvmeq->qid); |
a4aea562 MB |
1305 | if (nvme_submit_cmd(dev->queues[0], &cmd) < 0) { |
1306 | dev_warn(nvmeq->q_dmadev, | |
1307 | "Could not abort I/O %d QID %d", | |
1308 | req->tag, nvmeq->qid); | |
c87fd540 | 1309 | blk_mq_free_request(abort_req); |
a4aea562 | 1310 | } |
c30341dc KB |
1311 | } |
1312 | ||
42483228 | 1313 | static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) |
a09115b2 | 1314 | { |
a4aea562 MB |
1315 | struct nvme_queue *nvmeq = data; |
1316 | void *ctx; | |
1317 | nvme_completion_fn fn; | |
1318 | struct nvme_cmd_info *cmd; | |
cef6a948 KB |
1319 | struct nvme_completion cqe; |
1320 | ||
1321 | if (!blk_mq_request_started(req)) | |
1322 | return; | |
a09115b2 | 1323 | |
a4aea562 | 1324 | cmd = blk_mq_rq_to_pdu(req); |
a09115b2 | 1325 | |
a4aea562 MB |
1326 | if (cmd->ctx == CMD_CTX_CANCELLED) |
1327 | return; | |
1328 | ||
cef6a948 KB |
1329 | if (blk_queue_dying(req->q)) |
1330 | cqe.status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); | |
1331 | else | |
1332 | cqe.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); | |
1333 | ||
1334 | ||
a4aea562 MB |
1335 | dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", |
1336 | req->tag, nvmeq->qid); | |
1337 | ctx = cancel_cmd_info(cmd, &fn); | |
1338 | fn(nvmeq, ctx, &cqe); | |
a09115b2 MW |
1339 | } |
1340 | ||
a4aea562 | 1341 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
9e866774 | 1342 | { |
a4aea562 MB |
1343 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
1344 | struct nvme_queue *nvmeq = cmd->nvmeq; | |
1345 | ||
1346 | dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag, | |
1347 | nvmeq->qid); | |
7a509a6b | 1348 | spin_lock_irq(&nvmeq->q_lock); |
07836e65 | 1349 | nvme_abort_req(req); |
7a509a6b | 1350 | spin_unlock_irq(&nvmeq->q_lock); |
a4aea562 | 1351 | |
07836e65 KB |
1352 | /* |
1353 | * The aborted req will be completed on receiving the abort req. | |
1354 | * We enable the timer again. If hit twice, it'll cause a device reset, | |
1355 | * as the device then is in a faulty state. | |
1356 | */ | |
1357 | return BLK_EH_RESET_TIMER; | |
a4aea562 | 1358 | } |
22404274 | 1359 | |
a4aea562 MB |
1360 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
1361 | { | |
9e866774 MW |
1362 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
1363 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); | |
1364 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), | |
1365 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); | |
1366 | kfree(nvmeq); | |
1367 | } | |
1368 | ||
a1a5ef99 | 1369 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
22404274 KB |
1370 | { |
1371 | int i; | |
1372 | ||
a1a5ef99 | 1373 | for (i = dev->queue_count - 1; i >= lowest; i--) { |
a4aea562 | 1374 | struct nvme_queue *nvmeq = dev->queues[i]; |
22404274 | 1375 | dev->queue_count--; |
a4aea562 | 1376 | dev->queues[i] = NULL; |
f435c282 | 1377 | nvme_free_queue(nvmeq); |
121c7ad4 | 1378 | } |
22404274 KB |
1379 | } |
1380 | ||
4d115420 KB |
1381 | /** |
1382 | * nvme_suspend_queue - put queue into suspended state | |
1383 | * @nvmeq - queue to suspend | |
4d115420 KB |
1384 | */ |
1385 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) | |
b60503ba | 1386 | { |
2b25d981 | 1387 | int vector; |
b60503ba | 1388 | |
a09115b2 | 1389 | spin_lock_irq(&nvmeq->q_lock); |
2b25d981 KB |
1390 | if (nvmeq->cq_vector == -1) { |
1391 | spin_unlock_irq(&nvmeq->q_lock); | |
1392 | return 1; | |
1393 | } | |
1394 | vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; | |
42f61420 | 1395 | nvmeq->dev->online_queues--; |
2b25d981 | 1396 | nvmeq->cq_vector = -1; |
a09115b2 MW |
1397 | spin_unlock_irq(&nvmeq->q_lock); |
1398 | ||
6df3dbc8 KB |
1399 | if (!nvmeq->qid && nvmeq->dev->admin_q) |
1400 | blk_mq_freeze_queue_start(nvmeq->dev->admin_q); | |
1401 | ||
aba2080f MW |
1402 | irq_set_affinity_hint(vector, NULL); |
1403 | free_irq(vector, nvmeq); | |
b60503ba | 1404 | |
4d115420 KB |
1405 | return 0; |
1406 | } | |
b60503ba | 1407 | |
4d115420 KB |
1408 | static void nvme_clear_queue(struct nvme_queue *nvmeq) |
1409 | { | |
22404274 | 1410 | spin_lock_irq(&nvmeq->q_lock); |
42483228 KB |
1411 | if (nvmeq->tags && *nvmeq->tags) |
1412 | blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); | |
22404274 | 1413 | spin_unlock_irq(&nvmeq->q_lock); |
b60503ba MW |
1414 | } |
1415 | ||
4d115420 KB |
1416 | static void nvme_disable_queue(struct nvme_dev *dev, int qid) |
1417 | { | |
a4aea562 | 1418 | struct nvme_queue *nvmeq = dev->queues[qid]; |
4d115420 KB |
1419 | |
1420 | if (!nvmeq) | |
1421 | return; | |
1422 | if (nvme_suspend_queue(nvmeq)) | |
1423 | return; | |
1424 | ||
0e53d180 KB |
1425 | /* Don't tell the adapter to delete the admin queue. |
1426 | * Don't tell a removed adapter to delete IO queues. */ | |
1427 | if (qid && readl(&dev->bar->csts) != -1) { | |
b60503ba MW |
1428 | adapter_delete_sq(dev, qid); |
1429 | adapter_delete_cq(dev, qid); | |
1430 | } | |
07836e65 KB |
1431 | |
1432 | spin_lock_irq(&nvmeq->q_lock); | |
1433 | nvme_process_cq(nvmeq); | |
1434 | spin_unlock_irq(&nvmeq->q_lock); | |
b60503ba MW |
1435 | } |
1436 | ||
1437 | static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, | |
2b25d981 | 1438 | int depth) |
b60503ba | 1439 | { |
a4aea562 | 1440 | struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); |
b60503ba MW |
1441 | if (!nvmeq) |
1442 | return NULL; | |
1443 | ||
e75ec752 | 1444 | nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), |
4d51abf9 | 1445 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
b60503ba MW |
1446 | if (!nvmeq->cqes) |
1447 | goto free_nvmeq; | |
b60503ba | 1448 | |
e75ec752 | 1449 | nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), |
b60503ba MW |
1450 | &nvmeq->sq_dma_addr, GFP_KERNEL); |
1451 | if (!nvmeq->sq_cmds) | |
1452 | goto free_cqdma; | |
1453 | ||
e75ec752 | 1454 | nvmeq->q_dmadev = dev->dev; |
091b6092 | 1455 | nvmeq->dev = dev; |
3193f07b MW |
1456 | snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", |
1457 | dev->instance, qid); | |
b60503ba MW |
1458 | spin_lock_init(&nvmeq->q_lock); |
1459 | nvmeq->cq_head = 0; | |
82123460 | 1460 | nvmeq->cq_phase = 1; |
b80d5ccc | 1461 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
b60503ba | 1462 | nvmeq->q_depth = depth; |
c30341dc | 1463 | nvmeq->qid = qid; |
a4aea562 | 1464 | dev->queues[qid] = nvmeq; |
b60503ba | 1465 | |
36a7e993 JD |
1466 | /* make sure queue descriptor is set before queue count, for kthread */ |
1467 | mb(); | |
1468 | dev->queue_count++; | |
1469 | ||
b60503ba MW |
1470 | return nvmeq; |
1471 | ||
1472 | free_cqdma: | |
e75ec752 | 1473 | dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
b60503ba MW |
1474 | nvmeq->cq_dma_addr); |
1475 | free_nvmeq: | |
1476 | kfree(nvmeq); | |
1477 | return NULL; | |
1478 | } | |
1479 | ||
3001082c MW |
1480 | static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, |
1481 | const char *name) | |
1482 | { | |
58ffacb5 MW |
1483 | if (use_threaded_interrupts) |
1484 | return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, | |
481e5bad | 1485 | nvme_irq_check, nvme_irq, IRQF_SHARED, |
58ffacb5 | 1486 | name, nvmeq); |
3001082c | 1487 | return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, |
481e5bad | 1488 | IRQF_SHARED, name, nvmeq); |
3001082c MW |
1489 | } |
1490 | ||
22404274 | 1491 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
b60503ba | 1492 | { |
22404274 | 1493 | struct nvme_dev *dev = nvmeq->dev; |
b60503ba | 1494 | |
7be50e93 | 1495 | spin_lock_irq(&nvmeq->q_lock); |
22404274 KB |
1496 | nvmeq->sq_tail = 0; |
1497 | nvmeq->cq_head = 0; | |
1498 | nvmeq->cq_phase = 1; | |
b80d5ccc | 1499 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
22404274 | 1500 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
42f61420 | 1501 | dev->online_queues++; |
7be50e93 | 1502 | spin_unlock_irq(&nvmeq->q_lock); |
22404274 KB |
1503 | } |
1504 | ||
1505 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) | |
1506 | { | |
1507 | struct nvme_dev *dev = nvmeq->dev; | |
1508 | int result; | |
3f85d50b | 1509 | |
2b25d981 | 1510 | nvmeq->cq_vector = qid - 1; |
b60503ba MW |
1511 | result = adapter_alloc_cq(dev, qid, nvmeq); |
1512 | if (result < 0) | |
22404274 | 1513 | return result; |
b60503ba MW |
1514 | |
1515 | result = adapter_alloc_sq(dev, qid, nvmeq); | |
1516 | if (result < 0) | |
1517 | goto release_cq; | |
1518 | ||
3193f07b | 1519 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
b60503ba MW |
1520 | if (result < 0) |
1521 | goto release_sq; | |
1522 | ||
22404274 | 1523 | nvme_init_queue(nvmeq, qid); |
22404274 | 1524 | return result; |
b60503ba MW |
1525 | |
1526 | release_sq: | |
1527 | adapter_delete_sq(dev, qid); | |
1528 | release_cq: | |
1529 | adapter_delete_cq(dev, qid); | |
22404274 | 1530 | return result; |
b60503ba MW |
1531 | } |
1532 | ||
ba47e386 MW |
1533 | static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) |
1534 | { | |
1535 | unsigned long timeout; | |
1536 | u32 bit = enabled ? NVME_CSTS_RDY : 0; | |
1537 | ||
1538 | timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; | |
1539 | ||
1540 | while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { | |
1541 | msleep(100); | |
1542 | if (fatal_signal_pending(current)) | |
1543 | return -EINTR; | |
1544 | if (time_after(jiffies, timeout)) { | |
e75ec752 | 1545 | dev_err(dev->dev, |
27e8166c MW |
1546 | "Device not ready; aborting %s\n", enabled ? |
1547 | "initialisation" : "reset"); | |
ba47e386 MW |
1548 | return -ENODEV; |
1549 | } | |
1550 | } | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * If the device has been passed off to us in an enabled state, just clear | |
1557 | * the enabled bit. The spec says we should set the 'shutdown notification | |
1558 | * bits', but doing so may cause the device to complete commands to the | |
1559 | * admin queue ... and we don't know what memory that might be pointing at! | |
1560 | */ | |
1561 | static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) | |
1562 | { | |
01079522 DM |
1563 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1564 | dev->ctrl_config &= ~NVME_CC_ENABLE; | |
1565 | writel(dev->ctrl_config, &dev->bar->cc); | |
44af146a | 1566 | |
ba47e386 MW |
1567 | return nvme_wait_ready(dev, cap, false); |
1568 | } | |
1569 | ||
1570 | static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) | |
1571 | { | |
01079522 DM |
1572 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1573 | dev->ctrl_config |= NVME_CC_ENABLE; | |
1574 | writel(dev->ctrl_config, &dev->bar->cc); | |
1575 | ||
ba47e386 MW |
1576 | return nvme_wait_ready(dev, cap, true); |
1577 | } | |
1578 | ||
1894d8f1 KB |
1579 | static int nvme_shutdown_ctrl(struct nvme_dev *dev) |
1580 | { | |
1581 | unsigned long timeout; | |
1894d8f1 | 1582 | |
01079522 DM |
1583 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1584 | dev->ctrl_config |= NVME_CC_SHN_NORMAL; | |
1585 | ||
1586 | writel(dev->ctrl_config, &dev->bar->cc); | |
1894d8f1 | 1587 | |
2484f407 | 1588 | timeout = SHUTDOWN_TIMEOUT + jiffies; |
1894d8f1 KB |
1589 | while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != |
1590 | NVME_CSTS_SHST_CMPLT) { | |
1591 | msleep(100); | |
1592 | if (fatal_signal_pending(current)) | |
1593 | return -EINTR; | |
1594 | if (time_after(jiffies, timeout)) { | |
e75ec752 | 1595 | dev_err(dev->dev, |
1894d8f1 KB |
1596 | "Device shutdown incomplete; abort shutdown\n"); |
1597 | return -ENODEV; | |
1598 | } | |
1599 | } | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
a4aea562 | 1604 | static struct blk_mq_ops nvme_mq_admin_ops = { |
d29ec824 | 1605 | .queue_rq = nvme_queue_rq, |
a4aea562 MB |
1606 | .map_queue = blk_mq_map_queue, |
1607 | .init_hctx = nvme_admin_init_hctx, | |
1608 | .init_request = nvme_admin_init_request, | |
1609 | .timeout = nvme_timeout, | |
1610 | }; | |
1611 | ||
1612 | static struct blk_mq_ops nvme_mq_ops = { | |
1613 | .queue_rq = nvme_queue_rq, | |
1614 | .map_queue = blk_mq_map_queue, | |
1615 | .init_hctx = nvme_init_hctx, | |
1616 | .init_request = nvme_init_request, | |
1617 | .timeout = nvme_timeout, | |
1618 | }; | |
1619 | ||
ea191d2f KB |
1620 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
1621 | { | |
1622 | if (dev->admin_q && !blk_queue_dying(dev->admin_q)) { | |
1623 | blk_cleanup_queue(dev->admin_q); | |
1624 | blk_mq_free_tag_set(&dev->admin_tagset); | |
1625 | } | |
1626 | } | |
1627 | ||
a4aea562 MB |
1628 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
1629 | { | |
1630 | if (!dev->admin_q) { | |
1631 | dev->admin_tagset.ops = &nvme_mq_admin_ops; | |
1632 | dev->admin_tagset.nr_hw_queues = 1; | |
1633 | dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1; | |
1efccc9d | 1634 | dev->admin_tagset.reserved_tags = 1; |
a4aea562 | 1635 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
e75ec752 | 1636 | dev->admin_tagset.numa_node = dev_to_node(dev->dev); |
ac3dd5bd | 1637 | dev->admin_tagset.cmd_size = nvme_cmd_size(dev); |
a4aea562 MB |
1638 | dev->admin_tagset.driver_data = dev; |
1639 | ||
1640 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) | |
1641 | return -ENOMEM; | |
1642 | ||
1643 | dev->admin_q = blk_mq_init_queue(&dev->admin_tagset); | |
35b489d3 | 1644 | if (IS_ERR(dev->admin_q)) { |
a4aea562 MB |
1645 | blk_mq_free_tag_set(&dev->admin_tagset); |
1646 | return -ENOMEM; | |
1647 | } | |
ea191d2f KB |
1648 | if (!blk_get_queue(dev->admin_q)) { |
1649 | nvme_dev_remove_admin(dev); | |
1650 | return -ENODEV; | |
1651 | } | |
0fb59cbc KB |
1652 | } else |
1653 | blk_mq_unfreeze_queue(dev->admin_q); | |
a4aea562 MB |
1654 | |
1655 | return 0; | |
1656 | } | |
1657 | ||
8d85fce7 | 1658 | static int nvme_configure_admin_queue(struct nvme_dev *dev) |
b60503ba | 1659 | { |
ba47e386 | 1660 | int result; |
b60503ba | 1661 | u32 aqa; |
ba47e386 | 1662 | u64 cap = readq(&dev->bar->cap); |
b60503ba | 1663 | struct nvme_queue *nvmeq; |
1d090624 KB |
1664 | unsigned page_shift = PAGE_SHIFT; |
1665 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; | |
1666 | unsigned dev_page_max = NVME_CAP_MPSMAX(cap) + 12; | |
1667 | ||
1668 | if (page_shift < dev_page_min) { | |
e75ec752 | 1669 | dev_err(dev->dev, |
1d090624 KB |
1670 | "Minimum device page size (%u) too large for " |
1671 | "host (%u)\n", 1 << dev_page_min, | |
1672 | 1 << page_shift); | |
1673 | return -ENODEV; | |
1674 | } | |
1675 | if (page_shift > dev_page_max) { | |
e75ec752 | 1676 | dev_info(dev->dev, |
1d090624 KB |
1677 | "Device maximum page size (%u) smaller than " |
1678 | "host (%u); enabling work-around\n", | |
1679 | 1 << dev_page_max, 1 << page_shift); | |
1680 | page_shift = dev_page_max; | |
1681 | } | |
b60503ba | 1682 | |
ba47e386 MW |
1683 | result = nvme_disable_ctrl(dev, cap); |
1684 | if (result < 0) | |
1685 | return result; | |
b60503ba | 1686 | |
a4aea562 | 1687 | nvmeq = dev->queues[0]; |
cd638946 | 1688 | if (!nvmeq) { |
2b25d981 | 1689 | nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); |
cd638946 KB |
1690 | if (!nvmeq) |
1691 | return -ENOMEM; | |
cd638946 | 1692 | } |
b60503ba MW |
1693 | |
1694 | aqa = nvmeq->q_depth - 1; | |
1695 | aqa |= aqa << 16; | |
1696 | ||
1d090624 KB |
1697 | dev->page_size = 1 << page_shift; |
1698 | ||
01079522 | 1699 | dev->ctrl_config = NVME_CC_CSS_NVM; |
1d090624 | 1700 | dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; |
b60503ba | 1701 | dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; |
7f53f9d2 | 1702 | dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
b60503ba MW |
1703 | |
1704 | writel(aqa, &dev->bar->aqa); | |
1705 | writeq(nvmeq->sq_dma_addr, &dev->bar->asq); | |
1706 | writeq(nvmeq->cq_dma_addr, &dev->bar->acq); | |
b60503ba | 1707 | |
ba47e386 | 1708 | result = nvme_enable_ctrl(dev, cap); |
025c557a | 1709 | if (result) |
a4aea562 MB |
1710 | goto free_nvmeq; |
1711 | ||
2b25d981 | 1712 | nvmeq->cq_vector = 0; |
3193f07b | 1713 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
025c557a | 1714 | if (result) |
0fb59cbc | 1715 | goto free_nvmeq; |
025c557a | 1716 | |
b60503ba | 1717 | return result; |
a4aea562 | 1718 | |
a4aea562 MB |
1719 | free_nvmeq: |
1720 | nvme_free_queues(dev, 0); | |
1721 | return result; | |
b60503ba MW |
1722 | } |
1723 | ||
a53295b6 MW |
1724 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
1725 | { | |
1726 | struct nvme_dev *dev = ns->dev; | |
a53295b6 MW |
1727 | struct nvme_user_io io; |
1728 | struct nvme_command c; | |
d29ec824 | 1729 | unsigned length, meta_len; |
a67a9513 | 1730 | int status, write; |
a67a9513 KB |
1731 | dma_addr_t meta_dma = 0; |
1732 | void *meta = NULL; | |
a53295b6 MW |
1733 | |
1734 | if (copy_from_user(&io, uio, sizeof(io))) | |
1735 | return -EFAULT; | |
6c7d4945 MW |
1736 | |
1737 | switch (io.opcode) { | |
1738 | case nvme_cmd_write: | |
1739 | case nvme_cmd_read: | |
6bbf1acd | 1740 | case nvme_cmd_compare: |
6413214c | 1741 | break; |
6c7d4945 | 1742 | default: |
6bbf1acd | 1743 | return -EINVAL; |
6c7d4945 MW |
1744 | } |
1745 | ||
d29ec824 CH |
1746 | length = (io.nblocks + 1) << ns->lba_shift; |
1747 | meta_len = (io.nblocks + 1) * ns->ms; | |
1748 | write = io.opcode & 1; | |
a53295b6 | 1749 | |
a67a9513 | 1750 | if (meta_len) { |
d29ec824 CH |
1751 | if (((io.metadata & 3) || !io.metadata) && !ns->ext) |
1752 | return -EINVAL; | |
1753 | ||
1754 | if (ns->ext) { | |
1755 | length += meta_len; | |
1756 | meta_len = 0; | |
1757 | } | |
1758 | ||
e75ec752 | 1759 | meta = dma_alloc_coherent(dev->dev, meta_len, |
a67a9513 KB |
1760 | &meta_dma, GFP_KERNEL); |
1761 | if (!meta) { | |
1762 | status = -ENOMEM; | |
1763 | goto unmap; | |
1764 | } | |
1765 | if (write) { | |
1766 | if (copy_from_user(meta, (void __user *)io.metadata, | |
1767 | meta_len)) { | |
1768 | status = -EFAULT; | |
1769 | goto unmap; | |
1770 | } | |
1771 | } | |
1772 | } | |
1773 | ||
a53295b6 MW |
1774 | memset(&c, 0, sizeof(c)); |
1775 | c.rw.opcode = io.opcode; | |
1776 | c.rw.flags = io.flags; | |
6c7d4945 | 1777 | c.rw.nsid = cpu_to_le32(ns->ns_id); |
a53295b6 | 1778 | c.rw.slba = cpu_to_le64(io.slba); |
6c7d4945 | 1779 | c.rw.length = cpu_to_le16(io.nblocks); |
a53295b6 | 1780 | c.rw.control = cpu_to_le16(io.control); |
1c9b5265 MW |
1781 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
1782 | c.rw.reftag = cpu_to_le32(io.reftag); | |
1783 | c.rw.apptag = cpu_to_le16(io.apptag); | |
1784 | c.rw.appmask = cpu_to_le16(io.appmask); | |
a67a9513 | 1785 | c.rw.metadata = cpu_to_le64(meta_dma); |
d29ec824 CH |
1786 | |
1787 | status = __nvme_submit_sync_cmd(ns->queue, &c, NULL, | |
1788 | (void __user *)io.addr, length, NULL, 0); | |
f410c680 | 1789 | unmap: |
a67a9513 KB |
1790 | if (meta) { |
1791 | if (status == NVME_SC_SUCCESS && !write) { | |
1792 | if (copy_to_user((void __user *)io.metadata, meta, | |
1793 | meta_len)) | |
1794 | status = -EFAULT; | |
1795 | } | |
e75ec752 | 1796 | dma_free_coherent(dev->dev, meta_len, meta, meta_dma); |
f410c680 | 1797 | } |
a53295b6 MW |
1798 | return status; |
1799 | } | |
1800 | ||
a4aea562 MB |
1801 | static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns, |
1802 | struct nvme_passthru_cmd __user *ucmd) | |
6ee44cdc | 1803 | { |
7963e521 | 1804 | struct nvme_passthru_cmd cmd; |
6ee44cdc | 1805 | struct nvme_command c; |
d29ec824 CH |
1806 | unsigned timeout = 0; |
1807 | int status; | |
6ee44cdc | 1808 | |
6bbf1acd MW |
1809 | if (!capable(CAP_SYS_ADMIN)) |
1810 | return -EACCES; | |
1811 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) | |
6ee44cdc | 1812 | return -EFAULT; |
6ee44cdc MW |
1813 | |
1814 | memset(&c, 0, sizeof(c)); | |
6bbf1acd MW |
1815 | c.common.opcode = cmd.opcode; |
1816 | c.common.flags = cmd.flags; | |
1817 | c.common.nsid = cpu_to_le32(cmd.nsid); | |
1818 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); | |
1819 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); | |
1820 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); | |
1821 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); | |
1822 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); | |
1823 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); | |
1824 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); | |
1825 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); | |
1826 | ||
d29ec824 CH |
1827 | if (cmd.timeout_ms) |
1828 | timeout = msecs_to_jiffies(cmd.timeout_ms); | |
f705f837 CH |
1829 | |
1830 | status = __nvme_submit_sync_cmd(ns ? ns->queue : dev->admin_q, &c, | |
d29ec824 CH |
1831 | NULL, (void __user *)cmd.addr, cmd.data_len, |
1832 | &cmd.result, timeout); | |
1833 | if (status >= 0) { | |
1834 | if (put_user(cmd.result, &ucmd->result)) | |
1835 | return -EFAULT; | |
6bbf1acd | 1836 | } |
f4f117f6 | 1837 | |
6ee44cdc MW |
1838 | return status; |
1839 | } | |
1840 | ||
b60503ba MW |
1841 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1842 | unsigned long arg) | |
1843 | { | |
1844 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
1845 | ||
1846 | switch (cmd) { | |
6bbf1acd | 1847 | case NVME_IOCTL_ID: |
c3bfe717 | 1848 | force_successful_syscall_return(); |
6bbf1acd MW |
1849 | return ns->ns_id; |
1850 | case NVME_IOCTL_ADMIN_CMD: | |
a4aea562 | 1851 | return nvme_user_cmd(ns->dev, NULL, (void __user *)arg); |
7963e521 | 1852 | case NVME_IOCTL_IO_CMD: |
a4aea562 | 1853 | return nvme_user_cmd(ns->dev, ns, (void __user *)arg); |
a53295b6 MW |
1854 | case NVME_IOCTL_SUBMIT_IO: |
1855 | return nvme_submit_io(ns, (void __user *)arg); | |
5d0f6131 VV |
1856 | case SG_GET_VERSION_NUM: |
1857 | return nvme_sg_get_version_num((void __user *)arg); | |
1858 | case SG_IO: | |
1859 | return nvme_sg_io(ns, (void __user *)arg); | |
b60503ba MW |
1860 | default: |
1861 | return -ENOTTY; | |
1862 | } | |
1863 | } | |
1864 | ||
320a3827 KB |
1865 | #ifdef CONFIG_COMPAT |
1866 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
1867 | unsigned int cmd, unsigned long arg) | |
1868 | { | |
320a3827 KB |
1869 | switch (cmd) { |
1870 | case SG_IO: | |
e179729a | 1871 | return -ENOIOCTLCMD; |
320a3827 KB |
1872 | } |
1873 | return nvme_ioctl(bdev, mode, cmd, arg); | |
1874 | } | |
1875 | #else | |
1876 | #define nvme_compat_ioctl NULL | |
1877 | #endif | |
1878 | ||
9ac27090 KB |
1879 | static int nvme_open(struct block_device *bdev, fmode_t mode) |
1880 | { | |
9e60352c KB |
1881 | int ret = 0; |
1882 | struct nvme_ns *ns; | |
9ac27090 | 1883 | |
9e60352c KB |
1884 | spin_lock(&dev_list_lock); |
1885 | ns = bdev->bd_disk->private_data; | |
1886 | if (!ns) | |
1887 | ret = -ENXIO; | |
1888 | else if (!kref_get_unless_zero(&ns->dev->kref)) | |
1889 | ret = -ENXIO; | |
1890 | spin_unlock(&dev_list_lock); | |
1891 | ||
1892 | return ret; | |
9ac27090 KB |
1893 | } |
1894 | ||
1895 | static void nvme_free_dev(struct kref *kref); | |
1896 | ||
1897 | static void nvme_release(struct gendisk *disk, fmode_t mode) | |
1898 | { | |
1899 | struct nvme_ns *ns = disk->private_data; | |
1900 | struct nvme_dev *dev = ns->dev; | |
1901 | ||
1902 | kref_put(&dev->kref, nvme_free_dev); | |
1903 | } | |
1904 | ||
4cc09e2d KB |
1905 | static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) |
1906 | { | |
1907 | /* some standard values */ | |
1908 | geo->heads = 1 << 6; | |
1909 | geo->sectors = 1 << 5; | |
1910 | geo->cylinders = get_capacity(bd->bd_disk) >> 11; | |
1911 | return 0; | |
1912 | } | |
1913 | ||
e1e5e564 KB |
1914 | static void nvme_config_discard(struct nvme_ns *ns) |
1915 | { | |
1916 | u32 logical_block_size = queue_logical_block_size(ns->queue); | |
1917 | ns->queue->limits.discard_zeroes_data = 0; | |
1918 | ns->queue->limits.discard_alignment = logical_block_size; | |
1919 | ns->queue->limits.discard_granularity = logical_block_size; | |
1920 | ns->queue->limits.max_discard_sectors = 0xffffffff; | |
1921 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); | |
1922 | } | |
1923 | ||
1b9dbf7f KB |
1924 | static int nvme_revalidate_disk(struct gendisk *disk) |
1925 | { | |
1926 | struct nvme_ns *ns = disk->private_data; | |
1927 | struct nvme_dev *dev = ns->dev; | |
1928 | struct nvme_id_ns *id; | |
a67a9513 KB |
1929 | u8 lbaf, pi_type; |
1930 | u16 old_ms; | |
e1e5e564 | 1931 | unsigned short bs; |
1b9dbf7f | 1932 | |
d29ec824 | 1933 | if (nvme_identify_ns(dev, ns->ns_id, &id)) { |
a5768aa8 KB |
1934 | dev_warn(dev->dev, "%s: Identify failure nvme%dn%d\n", __func__, |
1935 | dev->instance, ns->ns_id); | |
1936 | return -ENODEV; | |
1937 | } | |
1938 | if (id->ncap == 0) { | |
1939 | kfree(id); | |
1940 | return -ENODEV; | |
1b9dbf7f KB |
1941 | } |
1942 | ||
e1e5e564 KB |
1943 | old_ms = ns->ms; |
1944 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; | |
1b9dbf7f | 1945 | ns->lba_shift = id->lbaf[lbaf].ds; |
e1e5e564 | 1946 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); |
a67a9513 | 1947 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); |
e1e5e564 KB |
1948 | |
1949 | /* | |
1950 | * If identify namespace failed, use default 512 byte block size so | |
1951 | * block layer can use before failing read/write for 0 capacity. | |
1952 | */ | |
1953 | if (ns->lba_shift == 0) | |
1954 | ns->lba_shift = 9; | |
1955 | bs = 1 << ns->lba_shift; | |
1956 | ||
1957 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ | |
1958 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? | |
1959 | id->dps & NVME_NS_DPS_PI_MASK : 0; | |
1960 | ||
52b68d7e KB |
1961 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || |
1962 | ns->ms != old_ms || | |
e1e5e564 | 1963 | bs != queue_logical_block_size(disk->queue) || |
a67a9513 | 1964 | (ns->ms && ns->ext))) |
e1e5e564 KB |
1965 | blk_integrity_unregister(disk); |
1966 | ||
1967 | ns->pi_type = pi_type; | |
1968 | blk_queue_logical_block_size(ns->queue, bs); | |
1969 | ||
52b68d7e | 1970 | if (ns->ms && !blk_get_integrity(disk) && (disk->flags & GENHD_FL_UP) && |
a67a9513 | 1971 | !ns->ext) |
e1e5e564 KB |
1972 | nvme_init_integrity(ns); |
1973 | ||
a5768aa8 | 1974 | if (ns->ms && !blk_get_integrity(disk)) |
e1e5e564 KB |
1975 | set_capacity(disk, 0); |
1976 | else | |
1977 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); | |
1978 | ||
1979 | if (dev->oncs & NVME_CTRL_ONCS_DSM) | |
1980 | nvme_config_discard(ns); | |
1b9dbf7f | 1981 | |
d29ec824 | 1982 | kfree(id); |
1b9dbf7f KB |
1983 | return 0; |
1984 | } | |
1985 | ||
b60503ba MW |
1986 | static const struct block_device_operations nvme_fops = { |
1987 | .owner = THIS_MODULE, | |
1988 | .ioctl = nvme_ioctl, | |
320a3827 | 1989 | .compat_ioctl = nvme_compat_ioctl, |
9ac27090 KB |
1990 | .open = nvme_open, |
1991 | .release = nvme_release, | |
4cc09e2d | 1992 | .getgeo = nvme_getgeo, |
1b9dbf7f | 1993 | .revalidate_disk= nvme_revalidate_disk, |
b60503ba MW |
1994 | }; |
1995 | ||
1fa6aead MW |
1996 | static int nvme_kthread(void *data) |
1997 | { | |
d4b4ff8e | 1998 | struct nvme_dev *dev, *next; |
1fa6aead MW |
1999 | |
2000 | while (!kthread_should_stop()) { | |
564a232c | 2001 | set_current_state(TASK_INTERRUPTIBLE); |
1fa6aead | 2002 | spin_lock(&dev_list_lock); |
d4b4ff8e | 2003 | list_for_each_entry_safe(dev, next, &dev_list, node) { |
1fa6aead | 2004 | int i; |
07836e65 | 2005 | if (readl(&dev->bar->csts) & NVME_CSTS_CFS) { |
d4b4ff8e KB |
2006 | if (work_busy(&dev->reset_work)) |
2007 | continue; | |
2008 | list_del_init(&dev->node); | |
e75ec752 | 2009 | dev_warn(dev->dev, |
a4aea562 MB |
2010 | "Failed status: %x, reset controller\n", |
2011 | readl(&dev->bar->csts)); | |
9ca97374 | 2012 | dev->reset_workfn = nvme_reset_failed_dev; |
d4b4ff8e KB |
2013 | queue_work(nvme_workq, &dev->reset_work); |
2014 | continue; | |
2015 | } | |
1fa6aead | 2016 | for (i = 0; i < dev->queue_count; i++) { |
a4aea562 | 2017 | struct nvme_queue *nvmeq = dev->queues[i]; |
740216fc MW |
2018 | if (!nvmeq) |
2019 | continue; | |
1fa6aead | 2020 | spin_lock_irq(&nvmeq->q_lock); |
bc57a0f7 | 2021 | nvme_process_cq(nvmeq); |
6fccf938 KB |
2022 | |
2023 | while ((i == 0) && (dev->event_limit > 0)) { | |
a4aea562 | 2024 | if (nvme_submit_async_admin_req(dev)) |
6fccf938 KB |
2025 | break; |
2026 | dev->event_limit--; | |
2027 | } | |
1fa6aead MW |
2028 | spin_unlock_irq(&nvmeq->q_lock); |
2029 | } | |
2030 | } | |
2031 | spin_unlock(&dev_list_lock); | |
acb7aa0d | 2032 | schedule_timeout(round_jiffies_relative(HZ)); |
1fa6aead MW |
2033 | } |
2034 | return 0; | |
2035 | } | |
2036 | ||
e1e5e564 | 2037 | static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid) |
b60503ba MW |
2038 | { |
2039 | struct nvme_ns *ns; | |
2040 | struct gendisk *disk; | |
e75ec752 | 2041 | int node = dev_to_node(dev->dev); |
b60503ba | 2042 | |
a4aea562 | 2043 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
b60503ba | 2044 | if (!ns) |
e1e5e564 KB |
2045 | return; |
2046 | ||
a4aea562 | 2047 | ns->queue = blk_mq_init_queue(&dev->tagset); |
9f173b33 | 2048 | if (IS_ERR(ns->queue)) |
b60503ba | 2049 | goto out_free_ns; |
4eeb9215 MW |
2050 | queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); |
2051 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); | |
a4aea562 | 2052 | queue_flag_set_unlocked(QUEUE_FLAG_SG_GAPS, ns->queue); |
b60503ba MW |
2053 | ns->dev = dev; |
2054 | ns->queue->queuedata = ns; | |
2055 | ||
a4aea562 | 2056 | disk = alloc_disk_node(0, node); |
b60503ba MW |
2057 | if (!disk) |
2058 | goto out_free_queue; | |
a4aea562 | 2059 | |
5aff9382 | 2060 | ns->ns_id = nsid; |
b60503ba | 2061 | ns->disk = disk; |
e1e5e564 KB |
2062 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
2063 | list_add_tail(&ns->list, &dev->namespaces); | |
2064 | ||
e9ef4636 | 2065 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
8fc23e03 KB |
2066 | if (dev->max_hw_sectors) |
2067 | blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); | |
a4aea562 MB |
2068 | if (dev->stripe_size) |
2069 | blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); | |
a7d2ce28 KB |
2070 | if (dev->vwc & NVME_CTRL_VWC_PRESENT) |
2071 | blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); | |
b60503ba MW |
2072 | |
2073 | disk->major = nvme_major; | |
469071a3 | 2074 | disk->first_minor = 0; |
b60503ba MW |
2075 | disk->fops = &nvme_fops; |
2076 | disk->private_data = ns; | |
2077 | disk->queue = ns->queue; | |
b3fffdef | 2078 | disk->driverfs_dev = dev->device; |
469071a3 | 2079 | disk->flags = GENHD_FL_EXT_DEVT; |
5aff9382 | 2080 | sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); |
b60503ba | 2081 | |
e1e5e564 KB |
2082 | /* |
2083 | * Initialize capacity to 0 until we establish the namespace format and | |
2084 | * setup integrity extentions if necessary. The revalidate_disk after | |
2085 | * add_disk allows the driver to register with integrity if the format | |
2086 | * requires it. | |
2087 | */ | |
2088 | set_capacity(disk, 0); | |
a5768aa8 KB |
2089 | if (nvme_revalidate_disk(ns->disk)) |
2090 | goto out_free_disk; | |
2091 | ||
e1e5e564 KB |
2092 | add_disk(ns->disk); |
2093 | if (ns->ms) | |
2094 | revalidate_disk(ns->disk); | |
2095 | return; | |
a5768aa8 KB |
2096 | out_free_disk: |
2097 | kfree(disk); | |
2098 | list_del(&ns->list); | |
b60503ba MW |
2099 | out_free_queue: |
2100 | blk_cleanup_queue(ns->queue); | |
2101 | out_free_ns: | |
2102 | kfree(ns); | |
b60503ba MW |
2103 | } |
2104 | ||
42f61420 KB |
2105 | static void nvme_create_io_queues(struct nvme_dev *dev) |
2106 | { | |
a4aea562 | 2107 | unsigned i; |
42f61420 | 2108 | |
a4aea562 | 2109 | for (i = dev->queue_count; i <= dev->max_qid; i++) |
2b25d981 | 2110 | if (!nvme_alloc_queue(dev, i, dev->q_depth)) |
42f61420 KB |
2111 | break; |
2112 | ||
a4aea562 MB |
2113 | for (i = dev->online_queues; i <= dev->queue_count - 1; i++) |
2114 | if (nvme_create_queue(dev->queues[i], i)) | |
42f61420 KB |
2115 | break; |
2116 | } | |
2117 | ||
b3b06812 | 2118 | static int set_queue_count(struct nvme_dev *dev, int count) |
b60503ba MW |
2119 | { |
2120 | int status; | |
2121 | u32 result; | |
b3b06812 | 2122 | u32 q_count = (count - 1) | ((count - 1) << 16); |
b60503ba | 2123 | |
df348139 | 2124 | status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, |
bc5fc7e4 | 2125 | &result); |
27e8166c MW |
2126 | if (status < 0) |
2127 | return status; | |
2128 | if (status > 0) { | |
e75ec752 | 2129 | dev_err(dev->dev, "Could not set queue count (%d)\n", status); |
badc34d4 | 2130 | return 0; |
27e8166c | 2131 | } |
b60503ba MW |
2132 | return min(result & 0xffff, result >> 16) + 1; |
2133 | } | |
2134 | ||
9d713c2b KB |
2135 | static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
2136 | { | |
b80d5ccc | 2137 | return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); |
9d713c2b KB |
2138 | } |
2139 | ||
8d85fce7 | 2140 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
b60503ba | 2141 | { |
a4aea562 | 2142 | struct nvme_queue *adminq = dev->queues[0]; |
e75ec752 | 2143 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
42f61420 | 2144 | int result, i, vecs, nr_io_queues, size; |
b60503ba | 2145 | |
42f61420 | 2146 | nr_io_queues = num_possible_cpus(); |
b348b7d5 | 2147 | result = set_queue_count(dev, nr_io_queues); |
badc34d4 | 2148 | if (result <= 0) |
1b23484b | 2149 | return result; |
b348b7d5 MW |
2150 | if (result < nr_io_queues) |
2151 | nr_io_queues = result; | |
b60503ba | 2152 | |
9d713c2b KB |
2153 | size = db_bar_size(dev, nr_io_queues); |
2154 | if (size > 8192) { | |
f1938f6e | 2155 | iounmap(dev->bar); |
9d713c2b KB |
2156 | do { |
2157 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); | |
2158 | if (dev->bar) | |
2159 | break; | |
2160 | if (!--nr_io_queues) | |
2161 | return -ENOMEM; | |
2162 | size = db_bar_size(dev, nr_io_queues); | |
2163 | } while (1); | |
f1938f6e | 2164 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
5a92e700 | 2165 | adminq->q_db = dev->dbs; |
f1938f6e MW |
2166 | } |
2167 | ||
9d713c2b | 2168 | /* Deregister the admin queue's interrupt */ |
3193f07b | 2169 | free_irq(dev->entry[0].vector, adminq); |
9d713c2b | 2170 | |
e32efbfc JA |
2171 | /* |
2172 | * If we enable msix early due to not intx, disable it again before | |
2173 | * setting up the full range we need. | |
2174 | */ | |
2175 | if (!pdev->irq) | |
2176 | pci_disable_msix(pdev); | |
2177 | ||
be577fab | 2178 | for (i = 0; i < nr_io_queues; i++) |
1b23484b | 2179 | dev->entry[i].entry = i; |
be577fab AG |
2180 | vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); |
2181 | if (vecs < 0) { | |
2182 | vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); | |
2183 | if (vecs < 0) { | |
2184 | vecs = 1; | |
2185 | } else { | |
2186 | for (i = 0; i < vecs; i++) | |
2187 | dev->entry[i].vector = i + pdev->irq; | |
fa08a396 RRG |
2188 | } |
2189 | } | |
2190 | ||
063a8096 MW |
2191 | /* |
2192 | * Should investigate if there's a performance win from allocating | |
2193 | * more queues than interrupt vectors; it might allow the submission | |
2194 | * path to scale better, even if the receive path is limited by the | |
2195 | * number of interrupts. | |
2196 | */ | |
2197 | nr_io_queues = vecs; | |
42f61420 | 2198 | dev->max_qid = nr_io_queues; |
063a8096 | 2199 | |
3193f07b | 2200 | result = queue_request_irq(dev, adminq, adminq->irqname); |
a4aea562 | 2201 | if (result) |
22404274 | 2202 | goto free_queues; |
1b23484b | 2203 | |
cd638946 | 2204 | /* Free previously allocated queues that are no longer usable */ |
42f61420 | 2205 | nvme_free_queues(dev, nr_io_queues + 1); |
a4aea562 | 2206 | nvme_create_io_queues(dev); |
9ecdc946 | 2207 | |
22404274 | 2208 | return 0; |
b60503ba | 2209 | |
22404274 | 2210 | free_queues: |
a1a5ef99 | 2211 | nvme_free_queues(dev, 1); |
22404274 | 2212 | return result; |
b60503ba MW |
2213 | } |
2214 | ||
a5768aa8 KB |
2215 | static void nvme_free_namespace(struct nvme_ns *ns) |
2216 | { | |
2217 | list_del(&ns->list); | |
2218 | ||
2219 | spin_lock(&dev_list_lock); | |
2220 | ns->disk->private_data = NULL; | |
2221 | spin_unlock(&dev_list_lock); | |
2222 | ||
2223 | put_disk(ns->disk); | |
2224 | kfree(ns); | |
2225 | } | |
2226 | ||
2227 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) | |
2228 | { | |
2229 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); | |
2230 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); | |
2231 | ||
2232 | return nsa->ns_id - nsb->ns_id; | |
2233 | } | |
2234 | ||
2235 | static struct nvme_ns *nvme_find_ns(struct nvme_dev *dev, unsigned nsid) | |
2236 | { | |
2237 | struct nvme_ns *ns; | |
2238 | ||
2239 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2240 | if (ns->ns_id == nsid) | |
2241 | return ns; | |
2242 | if (ns->ns_id > nsid) | |
2243 | break; | |
2244 | } | |
2245 | return NULL; | |
2246 | } | |
2247 | ||
2248 | static inline bool nvme_io_incapable(struct nvme_dev *dev) | |
2249 | { | |
2250 | return (!dev->bar || readl(&dev->bar->csts) & NVME_CSTS_CFS || | |
2251 | dev->online_queues < 2); | |
2252 | } | |
2253 | ||
2254 | static void nvme_ns_remove(struct nvme_ns *ns) | |
2255 | { | |
2256 | bool kill = nvme_io_incapable(ns->dev) && !blk_queue_dying(ns->queue); | |
2257 | ||
2258 | if (kill) | |
2259 | blk_set_queue_dying(ns->queue); | |
2260 | if (ns->disk->flags & GENHD_FL_UP) { | |
2261 | if (blk_get_integrity(ns->disk)) | |
2262 | blk_integrity_unregister(ns->disk); | |
2263 | del_gendisk(ns->disk); | |
2264 | } | |
2265 | if (kill || !blk_queue_dying(ns->queue)) { | |
2266 | blk_mq_abort_requeue_list(ns->queue); | |
2267 | blk_cleanup_queue(ns->queue); | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | static void nvme_scan_namespaces(struct nvme_dev *dev, unsigned nn) | |
2272 | { | |
2273 | struct nvme_ns *ns, *next; | |
2274 | unsigned i; | |
2275 | ||
2276 | for (i = 1; i <= nn; i++) { | |
2277 | ns = nvme_find_ns(dev, i); | |
2278 | if (ns) { | |
2279 | if (revalidate_disk(ns->disk)) { | |
2280 | nvme_ns_remove(ns); | |
2281 | nvme_free_namespace(ns); | |
2282 | } | |
2283 | } else | |
2284 | nvme_alloc_ns(dev, i); | |
2285 | } | |
2286 | list_for_each_entry_safe(ns, next, &dev->namespaces, list) { | |
2287 | if (ns->ns_id > nn) { | |
2288 | nvme_ns_remove(ns); | |
2289 | nvme_free_namespace(ns); | |
2290 | } | |
2291 | } | |
2292 | list_sort(NULL, &dev->namespaces, ns_cmp); | |
2293 | } | |
2294 | ||
2295 | static void nvme_dev_scan(struct work_struct *work) | |
2296 | { | |
2297 | struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); | |
2298 | struct nvme_id_ctrl *ctrl; | |
2299 | ||
2300 | if (!dev->tagset.tags) | |
2301 | return; | |
2302 | if (nvme_identify_ctrl(dev, &ctrl)) | |
2303 | return; | |
2304 | nvme_scan_namespaces(dev, le32_to_cpup(&ctrl->nn)); | |
2305 | kfree(ctrl); | |
2306 | } | |
2307 | ||
422ef0c7 MW |
2308 | /* |
2309 | * Return: error value if an error occurred setting up the queues or calling | |
2310 | * Identify Device. 0 if these succeeded, even if adding some of the | |
2311 | * namespaces failed. At the moment, these failures are silent. TBD which | |
2312 | * failures should be reported. | |
2313 | */ | |
8d85fce7 | 2314 | static int nvme_dev_add(struct nvme_dev *dev) |
b60503ba | 2315 | { |
e75ec752 | 2316 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
c3bfe717 | 2317 | int res; |
a5768aa8 | 2318 | unsigned nn; |
51814232 | 2319 | struct nvme_id_ctrl *ctrl; |
159b67d7 | 2320 | int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; |
b60503ba | 2321 | |
d29ec824 | 2322 | res = nvme_identify_ctrl(dev, &ctrl); |
b60503ba | 2323 | if (res) { |
e75ec752 | 2324 | dev_err(dev->dev, "Identify Controller failed (%d)\n", res); |
e1e5e564 | 2325 | return -EIO; |
b60503ba MW |
2326 | } |
2327 | ||
51814232 | 2328 | nn = le32_to_cpup(&ctrl->nn); |
0e5e4f0e | 2329 | dev->oncs = le16_to_cpup(&ctrl->oncs); |
c30341dc | 2330 | dev->abort_limit = ctrl->acl + 1; |
a7d2ce28 | 2331 | dev->vwc = ctrl->vwc; |
51814232 MW |
2332 | memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); |
2333 | memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); | |
2334 | memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); | |
159b67d7 | 2335 | if (ctrl->mdts) |
8fc23e03 | 2336 | dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); |
68608c26 | 2337 | if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && |
a4aea562 MB |
2338 | (pdev->device == 0x0953) && ctrl->vs[3]) { |
2339 | unsigned int max_hw_sectors; | |
2340 | ||
159b67d7 | 2341 | dev->stripe_size = 1 << (ctrl->vs[3] + shift); |
a4aea562 MB |
2342 | max_hw_sectors = dev->stripe_size >> (shift - 9); |
2343 | if (dev->max_hw_sectors) { | |
2344 | dev->max_hw_sectors = min(max_hw_sectors, | |
2345 | dev->max_hw_sectors); | |
2346 | } else | |
2347 | dev->max_hw_sectors = max_hw_sectors; | |
2348 | } | |
d29ec824 | 2349 | kfree(ctrl); |
a4aea562 MB |
2350 | |
2351 | dev->tagset.ops = &nvme_mq_ops; | |
2352 | dev->tagset.nr_hw_queues = dev->online_queues - 1; | |
2353 | dev->tagset.timeout = NVME_IO_TIMEOUT; | |
e75ec752 | 2354 | dev->tagset.numa_node = dev_to_node(dev->dev); |
a4aea562 MB |
2355 | dev->tagset.queue_depth = |
2356 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; | |
ac3dd5bd | 2357 | dev->tagset.cmd_size = nvme_cmd_size(dev); |
a4aea562 MB |
2358 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; |
2359 | dev->tagset.driver_data = dev; | |
2360 | ||
2361 | if (blk_mq_alloc_tag_set(&dev->tagset)) | |
e1e5e564 | 2362 | return 0; |
b60503ba | 2363 | |
a5768aa8 | 2364 | schedule_work(&dev->scan_work); |
e1e5e564 | 2365 | return 0; |
b60503ba MW |
2366 | } |
2367 | ||
0877cb0d KB |
2368 | static int nvme_dev_map(struct nvme_dev *dev) |
2369 | { | |
42f61420 | 2370 | u64 cap; |
0877cb0d | 2371 | int bars, result = -ENOMEM; |
e75ec752 | 2372 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
0877cb0d KB |
2373 | |
2374 | if (pci_enable_device_mem(pdev)) | |
2375 | return result; | |
2376 | ||
2377 | dev->entry[0].vector = pdev->irq; | |
2378 | pci_set_master(pdev); | |
2379 | bars = pci_select_bars(pdev, IORESOURCE_MEM); | |
be7837e8 JA |
2380 | if (!bars) |
2381 | goto disable_pci; | |
2382 | ||
0877cb0d KB |
2383 | if (pci_request_selected_regions(pdev, bars, "nvme")) |
2384 | goto disable_pci; | |
2385 | ||
e75ec752 CH |
2386 | if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && |
2387 | dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) | |
052d0efa | 2388 | goto disable; |
0877cb0d | 2389 | |
0877cb0d KB |
2390 | dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); |
2391 | if (!dev->bar) | |
2392 | goto disable; | |
e32efbfc | 2393 | |
0e53d180 KB |
2394 | if (readl(&dev->bar->csts) == -1) { |
2395 | result = -ENODEV; | |
2396 | goto unmap; | |
2397 | } | |
e32efbfc JA |
2398 | |
2399 | /* | |
2400 | * Some devices don't advertse INTx interrupts, pre-enable a single | |
2401 | * MSIX vec for setup. We'll adjust this later. | |
2402 | */ | |
2403 | if (!pdev->irq) { | |
2404 | result = pci_enable_msix(pdev, dev->entry, 1); | |
2405 | if (result < 0) | |
2406 | goto unmap; | |
2407 | } | |
2408 | ||
42f61420 KB |
2409 | cap = readq(&dev->bar->cap); |
2410 | dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); | |
2411 | dev->db_stride = 1 << NVME_CAP_STRIDE(cap); | |
0877cb0d KB |
2412 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
2413 | ||
2414 | return 0; | |
2415 | ||
0e53d180 KB |
2416 | unmap: |
2417 | iounmap(dev->bar); | |
2418 | dev->bar = NULL; | |
0877cb0d KB |
2419 | disable: |
2420 | pci_release_regions(pdev); | |
2421 | disable_pci: | |
2422 | pci_disable_device(pdev); | |
2423 | return result; | |
2424 | } | |
2425 | ||
2426 | static void nvme_dev_unmap(struct nvme_dev *dev) | |
2427 | { | |
e75ec752 CH |
2428 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
2429 | ||
2430 | if (pdev->msi_enabled) | |
2431 | pci_disable_msi(pdev); | |
2432 | else if (pdev->msix_enabled) | |
2433 | pci_disable_msix(pdev); | |
0877cb0d KB |
2434 | |
2435 | if (dev->bar) { | |
2436 | iounmap(dev->bar); | |
2437 | dev->bar = NULL; | |
e75ec752 | 2438 | pci_release_regions(pdev); |
0877cb0d KB |
2439 | } |
2440 | ||
e75ec752 CH |
2441 | if (pci_is_enabled(pdev)) |
2442 | pci_disable_device(pdev); | |
0877cb0d KB |
2443 | } |
2444 | ||
4d115420 KB |
2445 | struct nvme_delq_ctx { |
2446 | struct task_struct *waiter; | |
2447 | struct kthread_worker *worker; | |
2448 | atomic_t refcount; | |
2449 | }; | |
2450 | ||
2451 | static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) | |
2452 | { | |
2453 | dq->waiter = current; | |
2454 | mb(); | |
2455 | ||
2456 | for (;;) { | |
2457 | set_current_state(TASK_KILLABLE); | |
2458 | if (!atomic_read(&dq->refcount)) | |
2459 | break; | |
2460 | if (!schedule_timeout(ADMIN_TIMEOUT) || | |
2461 | fatal_signal_pending(current)) { | |
0fb59cbc KB |
2462 | /* |
2463 | * Disable the controller first since we can't trust it | |
2464 | * at this point, but leave the admin queue enabled | |
2465 | * until all queue deletion requests are flushed. | |
2466 | * FIXME: This may take a while if there are more h/w | |
2467 | * queues than admin tags. | |
2468 | */ | |
4d115420 | 2469 | set_current_state(TASK_RUNNING); |
4d115420 | 2470 | nvme_disable_ctrl(dev, readq(&dev->bar->cap)); |
0fb59cbc | 2471 | nvme_clear_queue(dev->queues[0]); |
4d115420 | 2472 | flush_kthread_worker(dq->worker); |
0fb59cbc | 2473 | nvme_disable_queue(dev, 0); |
4d115420 KB |
2474 | return; |
2475 | } | |
2476 | } | |
2477 | set_current_state(TASK_RUNNING); | |
2478 | } | |
2479 | ||
2480 | static void nvme_put_dq(struct nvme_delq_ctx *dq) | |
2481 | { | |
2482 | atomic_dec(&dq->refcount); | |
2483 | if (dq->waiter) | |
2484 | wake_up_process(dq->waiter); | |
2485 | } | |
2486 | ||
2487 | static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) | |
2488 | { | |
2489 | atomic_inc(&dq->refcount); | |
2490 | return dq; | |
2491 | } | |
2492 | ||
2493 | static void nvme_del_queue_end(struct nvme_queue *nvmeq) | |
2494 | { | |
2495 | struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; | |
4d115420 KB |
2496 | nvme_put_dq(dq); |
2497 | } | |
2498 | ||
2499 | static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, | |
2500 | kthread_work_func_t fn) | |
2501 | { | |
2502 | struct nvme_command c; | |
2503 | ||
2504 | memset(&c, 0, sizeof(c)); | |
2505 | c.delete_queue.opcode = opcode; | |
2506 | c.delete_queue.qid = cpu_to_le16(nvmeq->qid); | |
2507 | ||
2508 | init_kthread_work(&nvmeq->cmdinfo.work, fn); | |
a4aea562 MB |
2509 | return nvme_submit_admin_async_cmd(nvmeq->dev, &c, &nvmeq->cmdinfo, |
2510 | ADMIN_TIMEOUT); | |
4d115420 KB |
2511 | } |
2512 | ||
2513 | static void nvme_del_cq_work_handler(struct kthread_work *work) | |
2514 | { | |
2515 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2516 | cmdinfo.work); | |
2517 | nvme_del_queue_end(nvmeq); | |
2518 | } | |
2519 | ||
2520 | static int nvme_delete_cq(struct nvme_queue *nvmeq) | |
2521 | { | |
2522 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, | |
2523 | nvme_del_cq_work_handler); | |
2524 | } | |
2525 | ||
2526 | static void nvme_del_sq_work_handler(struct kthread_work *work) | |
2527 | { | |
2528 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2529 | cmdinfo.work); | |
2530 | int status = nvmeq->cmdinfo.status; | |
2531 | ||
2532 | if (!status) | |
2533 | status = nvme_delete_cq(nvmeq); | |
2534 | if (status) | |
2535 | nvme_del_queue_end(nvmeq); | |
2536 | } | |
2537 | ||
2538 | static int nvme_delete_sq(struct nvme_queue *nvmeq) | |
2539 | { | |
2540 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, | |
2541 | nvme_del_sq_work_handler); | |
2542 | } | |
2543 | ||
2544 | static void nvme_del_queue_start(struct kthread_work *work) | |
2545 | { | |
2546 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2547 | cmdinfo.work); | |
4d115420 KB |
2548 | if (nvme_delete_sq(nvmeq)) |
2549 | nvme_del_queue_end(nvmeq); | |
2550 | } | |
2551 | ||
2552 | static void nvme_disable_io_queues(struct nvme_dev *dev) | |
2553 | { | |
2554 | int i; | |
2555 | DEFINE_KTHREAD_WORKER_ONSTACK(worker); | |
2556 | struct nvme_delq_ctx dq; | |
2557 | struct task_struct *kworker_task = kthread_run(kthread_worker_fn, | |
2558 | &worker, "nvme%d", dev->instance); | |
2559 | ||
2560 | if (IS_ERR(kworker_task)) { | |
e75ec752 | 2561 | dev_err(dev->dev, |
4d115420 KB |
2562 | "Failed to create queue del task\n"); |
2563 | for (i = dev->queue_count - 1; i > 0; i--) | |
2564 | nvme_disable_queue(dev, i); | |
2565 | return; | |
2566 | } | |
2567 | ||
2568 | dq.waiter = NULL; | |
2569 | atomic_set(&dq.refcount, 0); | |
2570 | dq.worker = &worker; | |
2571 | for (i = dev->queue_count - 1; i > 0; i--) { | |
a4aea562 | 2572 | struct nvme_queue *nvmeq = dev->queues[i]; |
4d115420 KB |
2573 | |
2574 | if (nvme_suspend_queue(nvmeq)) | |
2575 | continue; | |
2576 | nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); | |
2577 | nvmeq->cmdinfo.worker = dq.worker; | |
2578 | init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); | |
2579 | queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); | |
2580 | } | |
2581 | nvme_wait_dq(&dq, dev); | |
2582 | kthread_stop(kworker_task); | |
2583 | } | |
2584 | ||
b9afca3e DM |
2585 | /* |
2586 | * Remove the node from the device list and check | |
2587 | * for whether or not we need to stop the nvme_thread. | |
2588 | */ | |
2589 | static void nvme_dev_list_remove(struct nvme_dev *dev) | |
2590 | { | |
2591 | struct task_struct *tmp = NULL; | |
2592 | ||
2593 | spin_lock(&dev_list_lock); | |
2594 | list_del_init(&dev->node); | |
2595 | if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { | |
2596 | tmp = nvme_thread; | |
2597 | nvme_thread = NULL; | |
2598 | } | |
2599 | spin_unlock(&dev_list_lock); | |
2600 | ||
2601 | if (tmp) | |
2602 | kthread_stop(tmp); | |
2603 | } | |
2604 | ||
c9d3bf88 KB |
2605 | static void nvme_freeze_queues(struct nvme_dev *dev) |
2606 | { | |
2607 | struct nvme_ns *ns; | |
2608 | ||
2609 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2610 | blk_mq_freeze_queue_start(ns->queue); | |
2611 | ||
cddcd72b | 2612 | spin_lock_irq(ns->queue->queue_lock); |
c9d3bf88 | 2613 | queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); |
cddcd72b | 2614 | spin_unlock_irq(ns->queue->queue_lock); |
c9d3bf88 KB |
2615 | |
2616 | blk_mq_cancel_requeue_work(ns->queue); | |
2617 | blk_mq_stop_hw_queues(ns->queue); | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | static void nvme_unfreeze_queues(struct nvme_dev *dev) | |
2622 | { | |
2623 | struct nvme_ns *ns; | |
2624 | ||
2625 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2626 | queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); | |
2627 | blk_mq_unfreeze_queue(ns->queue); | |
2628 | blk_mq_start_stopped_hw_queues(ns->queue, true); | |
2629 | blk_mq_kick_requeue_list(ns->queue); | |
2630 | } | |
2631 | } | |
2632 | ||
f0b50732 | 2633 | static void nvme_dev_shutdown(struct nvme_dev *dev) |
b60503ba | 2634 | { |
22404274 | 2635 | int i; |
7c1b2450 | 2636 | u32 csts = -1; |
22404274 | 2637 | |
b9afca3e | 2638 | nvme_dev_list_remove(dev); |
1fa6aead | 2639 | |
c9d3bf88 KB |
2640 | if (dev->bar) { |
2641 | nvme_freeze_queues(dev); | |
7c1b2450 | 2642 | csts = readl(&dev->bar->csts); |
c9d3bf88 | 2643 | } |
7c1b2450 | 2644 | if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { |
4d115420 | 2645 | for (i = dev->queue_count - 1; i >= 0; i--) { |
a4aea562 | 2646 | struct nvme_queue *nvmeq = dev->queues[i]; |
4d115420 | 2647 | nvme_suspend_queue(nvmeq); |
4d115420 KB |
2648 | } |
2649 | } else { | |
2650 | nvme_disable_io_queues(dev); | |
1894d8f1 | 2651 | nvme_shutdown_ctrl(dev); |
4d115420 KB |
2652 | nvme_disable_queue(dev, 0); |
2653 | } | |
f0b50732 | 2654 | nvme_dev_unmap(dev); |
07836e65 KB |
2655 | |
2656 | for (i = dev->queue_count - 1; i >= 0; i--) | |
2657 | nvme_clear_queue(dev->queues[i]); | |
f0b50732 KB |
2658 | } |
2659 | ||
2660 | static void nvme_dev_remove(struct nvme_dev *dev) | |
2661 | { | |
9ac27090 | 2662 | struct nvme_ns *ns; |
f0b50732 | 2663 | |
a5768aa8 KB |
2664 | list_for_each_entry(ns, &dev->namespaces, list) |
2665 | nvme_ns_remove(ns); | |
b60503ba MW |
2666 | } |
2667 | ||
091b6092 MW |
2668 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
2669 | { | |
e75ec752 | 2670 | dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, |
091b6092 MW |
2671 | PAGE_SIZE, PAGE_SIZE, 0); |
2672 | if (!dev->prp_page_pool) | |
2673 | return -ENOMEM; | |
2674 | ||
99802a7a | 2675 | /* Optimisation for I/Os between 4k and 128k */ |
e75ec752 | 2676 | dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, |
99802a7a MW |
2677 | 256, 256, 0); |
2678 | if (!dev->prp_small_pool) { | |
2679 | dma_pool_destroy(dev->prp_page_pool); | |
2680 | return -ENOMEM; | |
2681 | } | |
091b6092 MW |
2682 | return 0; |
2683 | } | |
2684 | ||
2685 | static void nvme_release_prp_pools(struct nvme_dev *dev) | |
2686 | { | |
2687 | dma_pool_destroy(dev->prp_page_pool); | |
99802a7a | 2688 | dma_pool_destroy(dev->prp_small_pool); |
091b6092 MW |
2689 | } |
2690 | ||
cd58ad7d QSA |
2691 | static DEFINE_IDA(nvme_instance_ida); |
2692 | ||
2693 | static int nvme_set_instance(struct nvme_dev *dev) | |
b60503ba | 2694 | { |
cd58ad7d QSA |
2695 | int instance, error; |
2696 | ||
2697 | do { | |
2698 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) | |
2699 | return -ENODEV; | |
2700 | ||
2701 | spin_lock(&dev_list_lock); | |
2702 | error = ida_get_new(&nvme_instance_ida, &instance); | |
2703 | spin_unlock(&dev_list_lock); | |
2704 | } while (error == -EAGAIN); | |
2705 | ||
2706 | if (error) | |
2707 | return -ENODEV; | |
2708 | ||
2709 | dev->instance = instance; | |
2710 | return 0; | |
b60503ba MW |
2711 | } |
2712 | ||
2713 | static void nvme_release_instance(struct nvme_dev *dev) | |
2714 | { | |
cd58ad7d QSA |
2715 | spin_lock(&dev_list_lock); |
2716 | ida_remove(&nvme_instance_ida, dev->instance); | |
2717 | spin_unlock(&dev_list_lock); | |
b60503ba MW |
2718 | } |
2719 | ||
9ac27090 KB |
2720 | static void nvme_free_namespaces(struct nvme_dev *dev) |
2721 | { | |
2722 | struct nvme_ns *ns, *next; | |
2723 | ||
a5768aa8 KB |
2724 | list_for_each_entry_safe(ns, next, &dev->namespaces, list) |
2725 | nvme_free_namespace(ns); | |
9ac27090 KB |
2726 | } |
2727 | ||
5e82e952 KB |
2728 | static void nvme_free_dev(struct kref *kref) |
2729 | { | |
2730 | struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); | |
9ac27090 | 2731 | |
e75ec752 | 2732 | put_device(dev->dev); |
b3fffdef | 2733 | put_device(dev->device); |
9ac27090 | 2734 | nvme_free_namespaces(dev); |
285dffc9 | 2735 | nvme_release_instance(dev); |
a4aea562 | 2736 | blk_mq_free_tag_set(&dev->tagset); |
ea191d2f | 2737 | blk_put_queue(dev->admin_q); |
5e82e952 KB |
2738 | kfree(dev->queues); |
2739 | kfree(dev->entry); | |
2740 | kfree(dev); | |
2741 | } | |
2742 | ||
2743 | static int nvme_dev_open(struct inode *inode, struct file *f) | |
2744 | { | |
b3fffdef KB |
2745 | struct nvme_dev *dev; |
2746 | int instance = iminor(inode); | |
2747 | int ret = -ENODEV; | |
2748 | ||
2749 | spin_lock(&dev_list_lock); | |
2750 | list_for_each_entry(dev, &dev_list, node) { | |
2751 | if (dev->instance == instance) { | |
2e1d8448 KB |
2752 | if (!dev->admin_q) { |
2753 | ret = -EWOULDBLOCK; | |
2754 | break; | |
2755 | } | |
b3fffdef KB |
2756 | if (!kref_get_unless_zero(&dev->kref)) |
2757 | break; | |
2758 | f->private_data = dev; | |
2759 | ret = 0; | |
2760 | break; | |
2761 | } | |
2762 | } | |
2763 | spin_unlock(&dev_list_lock); | |
2764 | ||
2765 | return ret; | |
5e82e952 KB |
2766 | } |
2767 | ||
2768 | static int nvme_dev_release(struct inode *inode, struct file *f) | |
2769 | { | |
2770 | struct nvme_dev *dev = f->private_data; | |
2771 | kref_put(&dev->kref, nvme_free_dev); | |
2772 | return 0; | |
2773 | } | |
2774 | ||
2775 | static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) | |
2776 | { | |
2777 | struct nvme_dev *dev = f->private_data; | |
a4aea562 MB |
2778 | struct nvme_ns *ns; |
2779 | ||
5e82e952 KB |
2780 | switch (cmd) { |
2781 | case NVME_IOCTL_ADMIN_CMD: | |
a4aea562 | 2782 | return nvme_user_cmd(dev, NULL, (void __user *)arg); |
7963e521 | 2783 | case NVME_IOCTL_IO_CMD: |
a4aea562 MB |
2784 | if (list_empty(&dev->namespaces)) |
2785 | return -ENOTTY; | |
2786 | ns = list_first_entry(&dev->namespaces, struct nvme_ns, list); | |
2787 | return nvme_user_cmd(dev, ns, (void __user *)arg); | |
4cc06521 KB |
2788 | case NVME_IOCTL_RESET: |
2789 | dev_warn(dev->dev, "resetting controller\n"); | |
2790 | return nvme_reset(dev); | |
5e82e952 KB |
2791 | default: |
2792 | return -ENOTTY; | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | static const struct file_operations nvme_dev_fops = { | |
2797 | .owner = THIS_MODULE, | |
2798 | .open = nvme_dev_open, | |
2799 | .release = nvme_dev_release, | |
2800 | .unlocked_ioctl = nvme_dev_ioctl, | |
2801 | .compat_ioctl = nvme_dev_ioctl, | |
2802 | }; | |
2803 | ||
a4aea562 MB |
2804 | static void nvme_set_irq_hints(struct nvme_dev *dev) |
2805 | { | |
2806 | struct nvme_queue *nvmeq; | |
2807 | int i; | |
2808 | ||
2809 | for (i = 0; i < dev->online_queues; i++) { | |
2810 | nvmeq = dev->queues[i]; | |
2811 | ||
42483228 | 2812 | if (!nvmeq->tags || !(*nvmeq->tags)) |
a4aea562 MB |
2813 | continue; |
2814 | ||
2815 | irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, | |
42483228 | 2816 | blk_mq_tags_cpumask(*nvmeq->tags)); |
a4aea562 MB |
2817 | } |
2818 | } | |
2819 | ||
f0b50732 KB |
2820 | static int nvme_dev_start(struct nvme_dev *dev) |
2821 | { | |
2822 | int result; | |
b9afca3e | 2823 | bool start_thread = false; |
f0b50732 KB |
2824 | |
2825 | result = nvme_dev_map(dev); | |
2826 | if (result) | |
2827 | return result; | |
2828 | ||
2829 | result = nvme_configure_admin_queue(dev); | |
2830 | if (result) | |
2831 | goto unmap; | |
2832 | ||
2833 | spin_lock(&dev_list_lock); | |
b9afca3e DM |
2834 | if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { |
2835 | start_thread = true; | |
2836 | nvme_thread = NULL; | |
2837 | } | |
f0b50732 KB |
2838 | list_add(&dev->node, &dev_list); |
2839 | spin_unlock(&dev_list_lock); | |
2840 | ||
b9afca3e DM |
2841 | if (start_thread) { |
2842 | nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); | |
387caa5a | 2843 | wake_up_all(&nvme_kthread_wait); |
b9afca3e DM |
2844 | } else |
2845 | wait_event_killable(nvme_kthread_wait, nvme_thread); | |
2846 | ||
2847 | if (IS_ERR_OR_NULL(nvme_thread)) { | |
2848 | result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; | |
2849 | goto disable; | |
2850 | } | |
a4aea562 MB |
2851 | |
2852 | nvme_init_queue(dev->queues[0], 0); | |
0fb59cbc KB |
2853 | result = nvme_alloc_admin_tags(dev); |
2854 | if (result) | |
2855 | goto disable; | |
b9afca3e | 2856 | |
f0b50732 | 2857 | result = nvme_setup_io_queues(dev); |
badc34d4 | 2858 | if (result) |
0fb59cbc | 2859 | goto free_tags; |
f0b50732 | 2860 | |
a4aea562 MB |
2861 | nvme_set_irq_hints(dev); |
2862 | ||
1efccc9d | 2863 | dev->event_limit = 1; |
d82e8bfd | 2864 | return result; |
f0b50732 | 2865 | |
0fb59cbc KB |
2866 | free_tags: |
2867 | nvme_dev_remove_admin(dev); | |
f0b50732 | 2868 | disable: |
a1a5ef99 | 2869 | nvme_disable_queue(dev, 0); |
b9afca3e | 2870 | nvme_dev_list_remove(dev); |
f0b50732 KB |
2871 | unmap: |
2872 | nvme_dev_unmap(dev); | |
2873 | return result; | |
2874 | } | |
2875 | ||
9a6b9458 KB |
2876 | static int nvme_remove_dead_ctrl(void *arg) |
2877 | { | |
2878 | struct nvme_dev *dev = (struct nvme_dev *)arg; | |
e75ec752 | 2879 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
9a6b9458 KB |
2880 | |
2881 | if (pci_get_drvdata(pdev)) | |
c81f4975 | 2882 | pci_stop_and_remove_bus_device_locked(pdev); |
9a6b9458 KB |
2883 | kref_put(&dev->kref, nvme_free_dev); |
2884 | return 0; | |
2885 | } | |
2886 | ||
2887 | static void nvme_remove_disks(struct work_struct *ws) | |
2888 | { | |
9a6b9458 KB |
2889 | struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); |
2890 | ||
5a92e700 | 2891 | nvme_free_queues(dev, 1); |
302c6727 | 2892 | nvme_dev_remove(dev); |
9a6b9458 KB |
2893 | } |
2894 | ||
2895 | static int nvme_dev_resume(struct nvme_dev *dev) | |
2896 | { | |
2897 | int ret; | |
2898 | ||
2899 | ret = nvme_dev_start(dev); | |
badc34d4 | 2900 | if (ret) |
9a6b9458 | 2901 | return ret; |
badc34d4 | 2902 | if (dev->online_queues < 2) { |
9a6b9458 | 2903 | spin_lock(&dev_list_lock); |
9ca97374 | 2904 | dev->reset_workfn = nvme_remove_disks; |
9a6b9458 KB |
2905 | queue_work(nvme_workq, &dev->reset_work); |
2906 | spin_unlock(&dev_list_lock); | |
c9d3bf88 KB |
2907 | } else { |
2908 | nvme_unfreeze_queues(dev); | |
a5768aa8 | 2909 | schedule_work(&dev->scan_work); |
c9d3bf88 | 2910 | nvme_set_irq_hints(dev); |
9a6b9458 KB |
2911 | } |
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | static void nvme_dev_reset(struct nvme_dev *dev) | |
2916 | { | |
2917 | nvme_dev_shutdown(dev); | |
2918 | if (nvme_dev_resume(dev)) { | |
e75ec752 | 2919 | dev_warn(dev->dev, "Device failed to resume\n"); |
9a6b9458 KB |
2920 | kref_get(&dev->kref); |
2921 | if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", | |
2922 | dev->instance))) { | |
e75ec752 | 2923 | dev_err(dev->dev, |
9a6b9458 KB |
2924 | "Failed to start controller remove task\n"); |
2925 | kref_put(&dev->kref, nvme_free_dev); | |
2926 | } | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | static void nvme_reset_failed_dev(struct work_struct *ws) | |
2931 | { | |
2932 | struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); | |
2933 | nvme_dev_reset(dev); | |
2934 | } | |
2935 | ||
9ca97374 TH |
2936 | static void nvme_reset_workfn(struct work_struct *work) |
2937 | { | |
2938 | struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); | |
2939 | dev->reset_workfn(work); | |
2940 | } | |
2941 | ||
4cc06521 KB |
2942 | static int nvme_reset(struct nvme_dev *dev) |
2943 | { | |
2944 | int ret = -EBUSY; | |
2945 | ||
2946 | if (!dev->admin_q || blk_queue_dying(dev->admin_q)) | |
2947 | return -ENODEV; | |
2948 | ||
2949 | spin_lock(&dev_list_lock); | |
2950 | if (!work_pending(&dev->reset_work)) { | |
2951 | dev->reset_workfn = nvme_reset_failed_dev; | |
2952 | queue_work(nvme_workq, &dev->reset_work); | |
2953 | ret = 0; | |
2954 | } | |
2955 | spin_unlock(&dev_list_lock); | |
2956 | ||
2957 | if (!ret) { | |
2958 | flush_work(&dev->reset_work); | |
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | return ret; | |
2963 | } | |
2964 | ||
2965 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
2966 | struct device_attribute *attr, const char *buf, | |
2967 | size_t count) | |
2968 | { | |
2969 | struct nvme_dev *ndev = dev_get_drvdata(dev); | |
2970 | int ret; | |
2971 | ||
2972 | ret = nvme_reset(ndev); | |
2973 | if (ret < 0) | |
2974 | return ret; | |
2975 | ||
2976 | return count; | |
2977 | } | |
2978 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); | |
2979 | ||
2e1d8448 | 2980 | static void nvme_async_probe(struct work_struct *work); |
8d85fce7 | 2981 | static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
b60503ba | 2982 | { |
a4aea562 | 2983 | int node, result = -ENOMEM; |
b60503ba MW |
2984 | struct nvme_dev *dev; |
2985 | ||
a4aea562 MB |
2986 | node = dev_to_node(&pdev->dev); |
2987 | if (node == NUMA_NO_NODE) | |
2988 | set_dev_node(&pdev->dev, 0); | |
2989 | ||
2990 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); | |
b60503ba MW |
2991 | if (!dev) |
2992 | return -ENOMEM; | |
a4aea562 MB |
2993 | dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), |
2994 | GFP_KERNEL, node); | |
b60503ba MW |
2995 | if (!dev->entry) |
2996 | goto free; | |
a4aea562 MB |
2997 | dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), |
2998 | GFP_KERNEL, node); | |
b60503ba MW |
2999 | if (!dev->queues) |
3000 | goto free; | |
3001 | ||
3002 | INIT_LIST_HEAD(&dev->namespaces); | |
9ca97374 TH |
3003 | dev->reset_workfn = nvme_reset_failed_dev; |
3004 | INIT_WORK(&dev->reset_work, nvme_reset_workfn); | |
e75ec752 | 3005 | dev->dev = get_device(&pdev->dev); |
9a6b9458 | 3006 | pci_set_drvdata(pdev, dev); |
cd58ad7d QSA |
3007 | result = nvme_set_instance(dev); |
3008 | if (result) | |
a96d4f5c | 3009 | goto put_pci; |
b60503ba | 3010 | |
091b6092 MW |
3011 | result = nvme_setup_prp_pools(dev); |
3012 | if (result) | |
0877cb0d | 3013 | goto release; |
091b6092 | 3014 | |
fb35e914 | 3015 | kref_init(&dev->kref); |
b3fffdef KB |
3016 | dev->device = device_create(nvme_class, &pdev->dev, |
3017 | MKDEV(nvme_char_major, dev->instance), | |
3018 | dev, "nvme%d", dev->instance); | |
3019 | if (IS_ERR(dev->device)) { | |
3020 | result = PTR_ERR(dev->device); | |
2e1d8448 | 3021 | goto release_pools; |
b3fffdef KB |
3022 | } |
3023 | get_device(dev->device); | |
4cc06521 KB |
3024 | dev_set_drvdata(dev->device, dev); |
3025 | ||
3026 | result = device_create_file(dev->device, &dev_attr_reset_controller); | |
3027 | if (result) | |
3028 | goto put_dev; | |
740216fc | 3029 | |
e6e96d73 | 3030 | INIT_LIST_HEAD(&dev->node); |
a5768aa8 | 3031 | INIT_WORK(&dev->scan_work, nvme_dev_scan); |
2e1d8448 KB |
3032 | INIT_WORK(&dev->probe_work, nvme_async_probe); |
3033 | schedule_work(&dev->probe_work); | |
b60503ba MW |
3034 | return 0; |
3035 | ||
4cc06521 KB |
3036 | put_dev: |
3037 | device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); | |
3038 | put_device(dev->device); | |
0877cb0d | 3039 | release_pools: |
091b6092 | 3040 | nvme_release_prp_pools(dev); |
0877cb0d KB |
3041 | release: |
3042 | nvme_release_instance(dev); | |
a96d4f5c | 3043 | put_pci: |
e75ec752 | 3044 | put_device(dev->dev); |
b60503ba MW |
3045 | free: |
3046 | kfree(dev->queues); | |
3047 | kfree(dev->entry); | |
3048 | kfree(dev); | |
3049 | return result; | |
3050 | } | |
3051 | ||
2e1d8448 KB |
3052 | static void nvme_async_probe(struct work_struct *work) |
3053 | { | |
3054 | struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work); | |
3055 | int result; | |
3056 | ||
3057 | result = nvme_dev_start(dev); | |
3058 | if (result) | |
3059 | goto reset; | |
3060 | ||
3061 | if (dev->online_queues > 1) | |
3062 | result = nvme_dev_add(dev); | |
3063 | if (result) | |
3064 | goto reset; | |
3065 | ||
3066 | nvme_set_irq_hints(dev); | |
2e1d8448 KB |
3067 | return; |
3068 | reset: | |
4cc06521 | 3069 | spin_lock(&dev_list_lock); |
07836e65 KB |
3070 | if (!work_busy(&dev->reset_work)) { |
3071 | dev->reset_workfn = nvme_reset_failed_dev; | |
3072 | queue_work(nvme_workq, &dev->reset_work); | |
3073 | } | |
4cc06521 | 3074 | spin_unlock(&dev_list_lock); |
2e1d8448 KB |
3075 | } |
3076 | ||
f0d54a54 KB |
3077 | static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) |
3078 | { | |
a6739479 | 3079 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
f0d54a54 | 3080 | |
a6739479 KB |
3081 | if (prepare) |
3082 | nvme_dev_shutdown(dev); | |
3083 | else | |
3084 | nvme_dev_resume(dev); | |
f0d54a54 KB |
3085 | } |
3086 | ||
09ece142 KB |
3087 | static void nvme_shutdown(struct pci_dev *pdev) |
3088 | { | |
3089 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
3090 | nvme_dev_shutdown(dev); | |
3091 | } | |
3092 | ||
8d85fce7 | 3093 | static void nvme_remove(struct pci_dev *pdev) |
b60503ba MW |
3094 | { |
3095 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
9a6b9458 KB |
3096 | |
3097 | spin_lock(&dev_list_lock); | |
3098 | list_del_init(&dev->node); | |
3099 | spin_unlock(&dev_list_lock); | |
3100 | ||
3101 | pci_set_drvdata(pdev, NULL); | |
2e1d8448 | 3102 | flush_work(&dev->probe_work); |
9a6b9458 | 3103 | flush_work(&dev->reset_work); |
a5768aa8 | 3104 | flush_work(&dev->scan_work); |
4cc06521 | 3105 | device_remove_file(dev->device, &dev_attr_reset_controller); |
9a6b9458 | 3106 | nvme_dev_shutdown(dev); |
c9d3bf88 | 3107 | nvme_dev_remove(dev); |
a4aea562 | 3108 | nvme_dev_remove_admin(dev); |
b3fffdef | 3109 | device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); |
a1a5ef99 | 3110 | nvme_free_queues(dev, 0); |
9a6b9458 | 3111 | nvme_release_prp_pools(dev); |
5e82e952 | 3112 | kref_put(&dev->kref, nvme_free_dev); |
b60503ba MW |
3113 | } |
3114 | ||
3115 | /* These functions are yet to be implemented */ | |
3116 | #define nvme_error_detected NULL | |
3117 | #define nvme_dump_registers NULL | |
3118 | #define nvme_link_reset NULL | |
3119 | #define nvme_slot_reset NULL | |
3120 | #define nvme_error_resume NULL | |
cd638946 | 3121 | |
671a6018 | 3122 | #ifdef CONFIG_PM_SLEEP |
cd638946 KB |
3123 | static int nvme_suspend(struct device *dev) |
3124 | { | |
3125 | struct pci_dev *pdev = to_pci_dev(dev); | |
3126 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
3127 | ||
3128 | nvme_dev_shutdown(ndev); | |
3129 | return 0; | |
3130 | } | |
3131 | ||
3132 | static int nvme_resume(struct device *dev) | |
3133 | { | |
3134 | struct pci_dev *pdev = to_pci_dev(dev); | |
3135 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
cd638946 | 3136 | |
9a6b9458 | 3137 | if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { |
9ca97374 | 3138 | ndev->reset_workfn = nvme_reset_failed_dev; |
9a6b9458 KB |
3139 | queue_work(nvme_workq, &ndev->reset_work); |
3140 | } | |
3141 | return 0; | |
cd638946 | 3142 | } |
671a6018 | 3143 | #endif |
cd638946 KB |
3144 | |
3145 | static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); | |
b60503ba | 3146 | |
1d352035 | 3147 | static const struct pci_error_handlers nvme_err_handler = { |
b60503ba MW |
3148 | .error_detected = nvme_error_detected, |
3149 | .mmio_enabled = nvme_dump_registers, | |
3150 | .link_reset = nvme_link_reset, | |
3151 | .slot_reset = nvme_slot_reset, | |
3152 | .resume = nvme_error_resume, | |
f0d54a54 | 3153 | .reset_notify = nvme_reset_notify, |
b60503ba MW |
3154 | }; |
3155 | ||
3156 | /* Move to pci_ids.h later */ | |
3157 | #define PCI_CLASS_STORAGE_EXPRESS 0x010802 | |
3158 | ||
6eb0d698 | 3159 | static const struct pci_device_id nvme_id_table[] = { |
b60503ba MW |
3160 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
3161 | { 0, } | |
3162 | }; | |
3163 | MODULE_DEVICE_TABLE(pci, nvme_id_table); | |
3164 | ||
3165 | static struct pci_driver nvme_driver = { | |
3166 | .name = "nvme", | |
3167 | .id_table = nvme_id_table, | |
3168 | .probe = nvme_probe, | |
8d85fce7 | 3169 | .remove = nvme_remove, |
09ece142 | 3170 | .shutdown = nvme_shutdown, |
cd638946 KB |
3171 | .driver = { |
3172 | .pm = &nvme_dev_pm_ops, | |
3173 | }, | |
b60503ba MW |
3174 | .err_handler = &nvme_err_handler, |
3175 | }; | |
3176 | ||
3177 | static int __init nvme_init(void) | |
3178 | { | |
0ac13140 | 3179 | int result; |
1fa6aead | 3180 | |
b9afca3e | 3181 | init_waitqueue_head(&nvme_kthread_wait); |
b60503ba | 3182 | |
9a6b9458 KB |
3183 | nvme_workq = create_singlethread_workqueue("nvme"); |
3184 | if (!nvme_workq) | |
b9afca3e | 3185 | return -ENOMEM; |
9a6b9458 | 3186 | |
5c42ea16 KB |
3187 | result = register_blkdev(nvme_major, "nvme"); |
3188 | if (result < 0) | |
9a6b9458 | 3189 | goto kill_workq; |
5c42ea16 | 3190 | else if (result > 0) |
0ac13140 | 3191 | nvme_major = result; |
b60503ba | 3192 | |
b3fffdef KB |
3193 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
3194 | &nvme_dev_fops); | |
3195 | if (result < 0) | |
3196 | goto unregister_blkdev; | |
3197 | else if (result > 0) | |
3198 | nvme_char_major = result; | |
3199 | ||
3200 | nvme_class = class_create(THIS_MODULE, "nvme"); | |
c727040b AK |
3201 | if (IS_ERR(nvme_class)) { |
3202 | result = PTR_ERR(nvme_class); | |
b3fffdef | 3203 | goto unregister_chrdev; |
c727040b | 3204 | } |
b3fffdef | 3205 | |
f3db22fe KB |
3206 | result = pci_register_driver(&nvme_driver); |
3207 | if (result) | |
b3fffdef | 3208 | goto destroy_class; |
1fa6aead | 3209 | return 0; |
b60503ba | 3210 | |
b3fffdef KB |
3211 | destroy_class: |
3212 | class_destroy(nvme_class); | |
3213 | unregister_chrdev: | |
3214 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
1fa6aead | 3215 | unregister_blkdev: |
b60503ba | 3216 | unregister_blkdev(nvme_major, "nvme"); |
9a6b9458 KB |
3217 | kill_workq: |
3218 | destroy_workqueue(nvme_workq); | |
b60503ba MW |
3219 | return result; |
3220 | } | |
3221 | ||
3222 | static void __exit nvme_exit(void) | |
3223 | { | |
3224 | pci_unregister_driver(&nvme_driver); | |
3225 | unregister_blkdev(nvme_major, "nvme"); | |
9a6b9458 | 3226 | destroy_workqueue(nvme_workq); |
b3fffdef KB |
3227 | class_destroy(nvme_class); |
3228 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
b9afca3e | 3229 | BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); |
21bd78bc | 3230 | _nvme_check_size(); |
b60503ba MW |
3231 | } |
3232 | ||
3233 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); | |
3234 | MODULE_LICENSE("GPL"); | |
c78b4713 | 3235 | MODULE_VERSION("1.0"); |
b60503ba MW |
3236 | module_init(nvme_init); |
3237 | module_exit(nvme_exit); |