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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 | ||
8ffaadf7 JD |
75 | static bool use_cmb_sqes = true; |
76 | module_param(use_cmb_sqes, bool, 0644); | |
77 | MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); | |
78 | ||
1fa6aead MW |
79 | static DEFINE_SPINLOCK(dev_list_lock); |
80 | static LIST_HEAD(dev_list); | |
81 | static struct task_struct *nvme_thread; | |
9a6b9458 | 82 | static struct workqueue_struct *nvme_workq; |
b9afca3e | 83 | static wait_queue_head_t nvme_kthread_wait; |
1fa6aead | 84 | |
b3fffdef KB |
85 | static struct class *nvme_class; |
86 | ||
d4b4ff8e | 87 | static void nvme_reset_failed_dev(struct work_struct *ws); |
4cc06521 | 88 | static int nvme_reset(struct nvme_dev *dev); |
a4aea562 | 89 | static int nvme_process_cq(struct nvme_queue *nvmeq); |
d4b4ff8e | 90 | |
4d115420 KB |
91 | struct async_cmd_info { |
92 | struct kthread_work work; | |
93 | struct kthread_worker *worker; | |
a4aea562 | 94 | struct request *req; |
4d115420 KB |
95 | u32 result; |
96 | int status; | |
97 | void *ctx; | |
98 | }; | |
1fa6aead | 99 | |
b60503ba MW |
100 | /* |
101 | * An NVM Express queue. Each device has at least two (one for admin | |
102 | * commands and one for I/O commands). | |
103 | */ | |
104 | struct nvme_queue { | |
105 | struct device *q_dmadev; | |
091b6092 | 106 | struct nvme_dev *dev; |
3193f07b | 107 | char irqname[24]; /* nvme4294967295-65535\0 */ |
b60503ba MW |
108 | spinlock_t q_lock; |
109 | struct nvme_command *sq_cmds; | |
8ffaadf7 | 110 | struct nvme_command __iomem *sq_cmds_io; |
b60503ba | 111 | volatile struct nvme_completion *cqes; |
42483228 | 112 | struct blk_mq_tags **tags; |
b60503ba MW |
113 | dma_addr_t sq_dma_addr; |
114 | dma_addr_t cq_dma_addr; | |
b60503ba MW |
115 | u32 __iomem *q_db; |
116 | u16 q_depth; | |
6222d172 | 117 | s16 cq_vector; |
b60503ba MW |
118 | u16 sq_head; |
119 | u16 sq_tail; | |
120 | u16 cq_head; | |
c30341dc | 121 | u16 qid; |
e9539f47 MW |
122 | u8 cq_phase; |
123 | u8 cqe_seen; | |
4d115420 | 124 | struct async_cmd_info cmdinfo; |
b60503ba MW |
125 | }; |
126 | ||
127 | /* | |
128 | * Check we didin't inadvertently grow the command struct | |
129 | */ | |
130 | static inline void _nvme_check_size(void) | |
131 | { | |
132 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); | |
133 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); | |
134 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); | |
135 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); | |
136 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); | |
f8ebf840 | 137 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
c30341dc | 138 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
b60503ba MW |
139 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
140 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); | |
141 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); | |
142 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); | |
6ecec745 | 143 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
b60503ba MW |
144 | } |
145 | ||
edd10d33 | 146 | typedef void (*nvme_completion_fn)(struct nvme_queue *, void *, |
c2f5b650 MW |
147 | struct nvme_completion *); |
148 | ||
e85248e5 | 149 | struct nvme_cmd_info { |
c2f5b650 MW |
150 | nvme_completion_fn fn; |
151 | void *ctx; | |
c30341dc | 152 | int aborted; |
a4aea562 | 153 | struct nvme_queue *nvmeq; |
ac3dd5bd | 154 | struct nvme_iod iod[0]; |
e85248e5 MW |
155 | }; |
156 | ||
ac3dd5bd JA |
157 | /* |
158 | * Max size of iod being embedded in the request payload | |
159 | */ | |
160 | #define NVME_INT_PAGES 2 | |
161 | #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->page_size) | |
fda631ff | 162 | #define NVME_INT_MASK 0x01 |
ac3dd5bd JA |
163 | |
164 | /* | |
165 | * Will slightly overestimate the number of pages needed. This is OK | |
166 | * as it only leads to a small amount of wasted memory for the lifetime of | |
167 | * the I/O. | |
168 | */ | |
169 | static int nvme_npages(unsigned size, struct nvme_dev *dev) | |
170 | { | |
171 | unsigned nprps = DIV_ROUND_UP(size + dev->page_size, dev->page_size); | |
172 | return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); | |
173 | } | |
174 | ||
175 | static unsigned int nvme_cmd_size(struct nvme_dev *dev) | |
176 | { | |
177 | unsigned int ret = sizeof(struct nvme_cmd_info); | |
178 | ||
179 | ret += sizeof(struct nvme_iod); | |
180 | ret += sizeof(__le64 *) * nvme_npages(NVME_INT_BYTES(dev), dev); | |
181 | ret += sizeof(struct scatterlist) * NVME_INT_PAGES; | |
182 | ||
183 | return ret; | |
184 | } | |
185 | ||
a4aea562 MB |
186 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
187 | unsigned int hctx_idx) | |
e85248e5 | 188 | { |
a4aea562 MB |
189 | struct nvme_dev *dev = data; |
190 | struct nvme_queue *nvmeq = dev->queues[0]; | |
191 | ||
42483228 KB |
192 | WARN_ON(hctx_idx != 0); |
193 | WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); | |
194 | WARN_ON(nvmeq->tags); | |
195 | ||
a4aea562 | 196 | hctx->driver_data = nvmeq; |
42483228 | 197 | nvmeq->tags = &dev->admin_tagset.tags[0]; |
a4aea562 | 198 | return 0; |
e85248e5 MW |
199 | } |
200 | ||
4af0e21c KB |
201 | static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) |
202 | { | |
203 | struct nvme_queue *nvmeq = hctx->driver_data; | |
204 | ||
205 | nvmeq->tags = NULL; | |
206 | } | |
207 | ||
a4aea562 MB |
208 | static int nvme_admin_init_request(void *data, struct request *req, |
209 | unsigned int hctx_idx, unsigned int rq_idx, | |
210 | unsigned int numa_node) | |
22404274 | 211 | { |
a4aea562 MB |
212 | struct nvme_dev *dev = data; |
213 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
214 | struct nvme_queue *nvmeq = dev->queues[0]; | |
215 | ||
216 | BUG_ON(!nvmeq); | |
217 | cmd->nvmeq = nvmeq; | |
218 | return 0; | |
22404274 KB |
219 | } |
220 | ||
a4aea562 MB |
221 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
222 | unsigned int hctx_idx) | |
b60503ba | 223 | { |
a4aea562 | 224 | struct nvme_dev *dev = data; |
42483228 | 225 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
a4aea562 | 226 | |
42483228 KB |
227 | if (!nvmeq->tags) |
228 | nvmeq->tags = &dev->tagset.tags[hctx_idx]; | |
b60503ba | 229 | |
42483228 | 230 | WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); |
a4aea562 MB |
231 | hctx->driver_data = nvmeq; |
232 | return 0; | |
b60503ba MW |
233 | } |
234 | ||
a4aea562 MB |
235 | static int nvme_init_request(void *data, struct request *req, |
236 | unsigned int hctx_idx, unsigned int rq_idx, | |
237 | unsigned int numa_node) | |
b60503ba | 238 | { |
a4aea562 MB |
239 | struct nvme_dev *dev = data; |
240 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
241 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; | |
242 | ||
243 | BUG_ON(!nvmeq); | |
244 | cmd->nvmeq = nvmeq; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static void nvme_set_info(struct nvme_cmd_info *cmd, void *ctx, | |
249 | nvme_completion_fn handler) | |
250 | { | |
251 | cmd->fn = handler; | |
252 | cmd->ctx = ctx; | |
253 | cmd->aborted = 0; | |
c917dfe5 | 254 | blk_mq_start_request(blk_mq_rq_from_pdu(cmd)); |
b60503ba MW |
255 | } |
256 | ||
ac3dd5bd JA |
257 | static void *iod_get_private(struct nvme_iod *iod) |
258 | { | |
259 | return (void *) (iod->private & ~0x1UL); | |
260 | } | |
261 | ||
262 | /* | |
263 | * If bit 0 is set, the iod is embedded in the request payload. | |
264 | */ | |
265 | static bool iod_should_kfree(struct nvme_iod *iod) | |
266 | { | |
fda631ff | 267 | return (iod->private & NVME_INT_MASK) == 0; |
ac3dd5bd JA |
268 | } |
269 | ||
c2f5b650 MW |
270 | /* Special values must be less than 0x1000 */ |
271 | #define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) | |
d2d87034 MW |
272 | #define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) |
273 | #define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) | |
274 | #define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) | |
be7b6275 | 275 | |
edd10d33 | 276 | static void special_completion(struct nvme_queue *nvmeq, void *ctx, |
c2f5b650 MW |
277 | struct nvme_completion *cqe) |
278 | { | |
279 | if (ctx == CMD_CTX_CANCELLED) | |
280 | return; | |
c2f5b650 | 281 | if (ctx == CMD_CTX_COMPLETED) { |
edd10d33 | 282 | dev_warn(nvmeq->q_dmadev, |
c2f5b650 MW |
283 | "completed id %d twice on queue %d\n", |
284 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); | |
285 | return; | |
286 | } | |
287 | if (ctx == CMD_CTX_INVALID) { | |
edd10d33 | 288 | dev_warn(nvmeq->q_dmadev, |
c2f5b650 MW |
289 | "invalid id %d completed on queue %d\n", |
290 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); | |
291 | return; | |
292 | } | |
edd10d33 | 293 | dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); |
c2f5b650 MW |
294 | } |
295 | ||
a4aea562 | 296 | static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn) |
b60503ba | 297 | { |
c2f5b650 | 298 | void *ctx; |
b60503ba | 299 | |
859361a2 | 300 | if (fn) |
a4aea562 MB |
301 | *fn = cmd->fn; |
302 | ctx = cmd->ctx; | |
303 | cmd->fn = special_completion; | |
304 | cmd->ctx = CMD_CTX_CANCELLED; | |
c2f5b650 | 305 | return ctx; |
b60503ba MW |
306 | } |
307 | ||
a4aea562 MB |
308 | static void async_req_completion(struct nvme_queue *nvmeq, void *ctx, |
309 | struct nvme_completion *cqe) | |
3c0cf138 | 310 | { |
a4aea562 MB |
311 | u32 result = le32_to_cpup(&cqe->result); |
312 | u16 status = le16_to_cpup(&cqe->status) >> 1; | |
313 | ||
314 | if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) | |
315 | ++nvmeq->dev->event_limit; | |
a5768aa8 KB |
316 | if (status != NVME_SC_SUCCESS) |
317 | return; | |
318 | ||
319 | switch (result & 0xff07) { | |
320 | case NVME_AER_NOTICE_NS_CHANGED: | |
321 | dev_info(nvmeq->q_dmadev, "rescanning\n"); | |
322 | schedule_work(&nvmeq->dev->scan_work); | |
323 | default: | |
324 | dev_warn(nvmeq->q_dmadev, "async event result %08x\n", result); | |
325 | } | |
b60503ba MW |
326 | } |
327 | ||
a4aea562 MB |
328 | static void abort_completion(struct nvme_queue *nvmeq, void *ctx, |
329 | struct nvme_completion *cqe) | |
5a92e700 | 330 | { |
a4aea562 MB |
331 | struct request *req = ctx; |
332 | ||
333 | u16 status = le16_to_cpup(&cqe->status) >> 1; | |
334 | u32 result = le32_to_cpup(&cqe->result); | |
a51afb54 | 335 | |
42483228 | 336 | blk_mq_free_request(req); |
a51afb54 | 337 | |
a4aea562 MB |
338 | dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); |
339 | ++nvmeq->dev->abort_limit; | |
5a92e700 KB |
340 | } |
341 | ||
a4aea562 MB |
342 | static void async_completion(struct nvme_queue *nvmeq, void *ctx, |
343 | struct nvme_completion *cqe) | |
b60503ba | 344 | { |
a4aea562 MB |
345 | struct async_cmd_info *cmdinfo = ctx; |
346 | cmdinfo->result = le32_to_cpup(&cqe->result); | |
347 | cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; | |
348 | queue_kthread_work(cmdinfo->worker, &cmdinfo->work); | |
42483228 | 349 | blk_mq_free_request(cmdinfo->req); |
b60503ba MW |
350 | } |
351 | ||
a4aea562 MB |
352 | static inline struct nvme_cmd_info *get_cmd_from_tag(struct nvme_queue *nvmeq, |
353 | unsigned int tag) | |
b60503ba | 354 | { |
42483228 | 355 | struct request *req = blk_mq_tag_to_rq(*nvmeq->tags, tag); |
a51afb54 | 356 | |
a4aea562 | 357 | return blk_mq_rq_to_pdu(req); |
4f5099af KB |
358 | } |
359 | ||
a4aea562 MB |
360 | /* |
361 | * Called with local interrupts disabled and the q_lock held. May not sleep. | |
362 | */ | |
363 | static void *nvme_finish_cmd(struct nvme_queue *nvmeq, int tag, | |
364 | nvme_completion_fn *fn) | |
4f5099af | 365 | { |
a4aea562 MB |
366 | struct nvme_cmd_info *cmd = get_cmd_from_tag(nvmeq, tag); |
367 | void *ctx; | |
368 | if (tag >= nvmeq->q_depth) { | |
369 | *fn = special_completion; | |
370 | return CMD_CTX_INVALID; | |
371 | } | |
372 | if (fn) | |
373 | *fn = cmd->fn; | |
374 | ctx = cmd->ctx; | |
375 | cmd->fn = special_completion; | |
376 | cmd->ctx = CMD_CTX_COMPLETED; | |
377 | return ctx; | |
b60503ba MW |
378 | } |
379 | ||
380 | /** | |
714a7a22 | 381 | * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell |
b60503ba MW |
382 | * @nvmeq: The queue to use |
383 | * @cmd: The command to send | |
384 | * | |
385 | * Safe to use from interrupt context | |
386 | */ | |
e3f879bf SB |
387 | static void __nvme_submit_cmd(struct nvme_queue *nvmeq, |
388 | struct nvme_command *cmd) | |
b60503ba | 389 | { |
a4aea562 MB |
390 | u16 tail = nvmeq->sq_tail; |
391 | ||
8ffaadf7 JD |
392 | if (nvmeq->sq_cmds_io) |
393 | memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); | |
394 | else | |
395 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); | |
396 | ||
b60503ba MW |
397 | if (++tail == nvmeq->q_depth) |
398 | tail = 0; | |
7547881d | 399 | writel(tail, nvmeq->q_db); |
b60503ba | 400 | nvmeq->sq_tail = tail; |
b60503ba MW |
401 | } |
402 | ||
e3f879bf | 403 | static void nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) |
a4aea562 MB |
404 | { |
405 | unsigned long flags; | |
a4aea562 | 406 | spin_lock_irqsave(&nvmeq->q_lock, flags); |
e3f879bf | 407 | __nvme_submit_cmd(nvmeq, cmd); |
a4aea562 | 408 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); |
a4aea562 MB |
409 | } |
410 | ||
eca18b23 | 411 | static __le64 **iod_list(struct nvme_iod *iod) |
e025344c | 412 | { |
eca18b23 | 413 | return ((void *)iod) + iod->offset; |
e025344c SMM |
414 | } |
415 | ||
ac3dd5bd JA |
416 | static inline void iod_init(struct nvme_iod *iod, unsigned nbytes, |
417 | unsigned nseg, unsigned long private) | |
eca18b23 | 418 | { |
ac3dd5bd JA |
419 | iod->private = private; |
420 | iod->offset = offsetof(struct nvme_iod, sg[nseg]); | |
421 | iod->npages = -1; | |
422 | iod->length = nbytes; | |
423 | iod->nents = 0; | |
eca18b23 | 424 | } |
b60503ba | 425 | |
eca18b23 | 426 | static struct nvme_iod * |
ac3dd5bd JA |
427 | __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev, |
428 | unsigned long priv, gfp_t gfp) | |
b60503ba | 429 | { |
eca18b23 | 430 | struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + |
ac3dd5bd | 431 | sizeof(__le64 *) * nvme_npages(bytes, dev) + |
eca18b23 MW |
432 | sizeof(struct scatterlist) * nseg, gfp); |
433 | ||
ac3dd5bd JA |
434 | if (iod) |
435 | iod_init(iod, bytes, nseg, priv); | |
eca18b23 MW |
436 | |
437 | return iod; | |
b60503ba MW |
438 | } |
439 | ||
ac3dd5bd JA |
440 | static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev, |
441 | gfp_t gfp) | |
442 | { | |
443 | unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) : | |
444 | sizeof(struct nvme_dsm_range); | |
ac3dd5bd JA |
445 | struct nvme_iod *iod; |
446 | ||
447 | if (rq->nr_phys_segments <= NVME_INT_PAGES && | |
448 | size <= NVME_INT_BYTES(dev)) { | |
449 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq); | |
450 | ||
451 | iod = cmd->iod; | |
ac3dd5bd | 452 | iod_init(iod, size, rq->nr_phys_segments, |
fda631ff | 453 | (unsigned long) rq | NVME_INT_MASK); |
ac3dd5bd JA |
454 | return iod; |
455 | } | |
456 | ||
457 | return __nvme_alloc_iod(rq->nr_phys_segments, size, dev, | |
458 | (unsigned long) rq, gfp); | |
459 | } | |
460 | ||
d29ec824 | 461 | static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) |
b60503ba | 462 | { |
1d090624 | 463 | const int last_prp = dev->page_size / 8 - 1; |
eca18b23 MW |
464 | int i; |
465 | __le64 **list = iod_list(iod); | |
466 | dma_addr_t prp_dma = iod->first_dma; | |
467 | ||
468 | if (iod->npages == 0) | |
469 | dma_pool_free(dev->prp_small_pool, list[0], prp_dma); | |
470 | for (i = 0; i < iod->npages; i++) { | |
471 | __le64 *prp_list = list[i]; | |
472 | dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); | |
473 | dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); | |
474 | prp_dma = next_prp_dma; | |
475 | } | |
ac3dd5bd JA |
476 | |
477 | if (iod_should_kfree(iod)) | |
478 | kfree(iod); | |
b60503ba MW |
479 | } |
480 | ||
b4ff9c8d KB |
481 | static int nvme_error_status(u16 status) |
482 | { | |
483 | switch (status & 0x7ff) { | |
484 | case NVME_SC_SUCCESS: | |
485 | return 0; | |
486 | case NVME_SC_CAP_EXCEEDED: | |
487 | return -ENOSPC; | |
488 | default: | |
489 | return -EIO; | |
490 | } | |
491 | } | |
492 | ||
52b68d7e | 493 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
e1e5e564 KB |
494 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
495 | { | |
496 | if (be32_to_cpu(pi->ref_tag) == v) | |
497 | pi->ref_tag = cpu_to_be32(p); | |
498 | } | |
499 | ||
500 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
501 | { | |
502 | if (be32_to_cpu(pi->ref_tag) == p) | |
503 | pi->ref_tag = cpu_to_be32(v); | |
504 | } | |
505 | ||
506 | /** | |
507 | * nvme_dif_remap - remaps ref tags to bip seed and physical lba | |
508 | * | |
509 | * The virtual start sector is the one that was originally submitted by the | |
510 | * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical | |
511 | * start sector may be different. Remap protection information to match the | |
512 | * physical LBA on writes, and back to the original seed on reads. | |
513 | * | |
514 | * Type 0 and 3 do not have a ref tag, so no remapping required. | |
515 | */ | |
516 | static void nvme_dif_remap(struct request *req, | |
517 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
518 | { | |
519 | struct nvme_ns *ns = req->rq_disk->private_data; | |
520 | struct bio_integrity_payload *bip; | |
521 | struct t10_pi_tuple *pi; | |
522 | void *p, *pmap; | |
523 | u32 i, nlb, ts, phys, virt; | |
524 | ||
525 | if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) | |
526 | return; | |
527 | ||
528 | bip = bio_integrity(req->bio); | |
529 | if (!bip) | |
530 | return; | |
531 | ||
532 | pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; | |
e1e5e564 KB |
533 | |
534 | p = pmap; | |
535 | virt = bip_get_seed(bip); | |
536 | phys = nvme_block_nr(ns, blk_rq_pos(req)); | |
537 | nlb = (blk_rq_bytes(req) >> ns->lba_shift); | |
538 | ts = ns->disk->integrity->tuple_size; | |
539 | ||
540 | for (i = 0; i < nlb; i++, virt++, phys++) { | |
541 | pi = (struct t10_pi_tuple *)p; | |
542 | dif_swap(phys, virt, pi); | |
543 | p += ts; | |
544 | } | |
545 | kunmap_atomic(pmap); | |
546 | } | |
547 | ||
52b68d7e KB |
548 | static int nvme_noop_verify(struct blk_integrity_iter *iter) |
549 | { | |
550 | return 0; | |
551 | } | |
552 | ||
553 | static int nvme_noop_generate(struct blk_integrity_iter *iter) | |
554 | { | |
555 | return 0; | |
556 | } | |
557 | ||
558 | struct blk_integrity nvme_meta_noop = { | |
559 | .name = "NVME_META_NOOP", | |
560 | .generate_fn = nvme_noop_generate, | |
561 | .verify_fn = nvme_noop_verify, | |
562 | }; | |
563 | ||
564 | static void nvme_init_integrity(struct nvme_ns *ns) | |
565 | { | |
566 | struct blk_integrity integrity; | |
567 | ||
568 | switch (ns->pi_type) { | |
569 | case NVME_NS_DPS_PI_TYPE3: | |
570 | integrity = t10_pi_type3_crc; | |
571 | break; | |
572 | case NVME_NS_DPS_PI_TYPE1: | |
573 | case NVME_NS_DPS_PI_TYPE2: | |
574 | integrity = t10_pi_type1_crc; | |
575 | break; | |
576 | default: | |
577 | integrity = nvme_meta_noop; | |
578 | break; | |
579 | } | |
580 | integrity.tuple_size = ns->ms; | |
581 | blk_integrity_register(ns->disk, &integrity); | |
582 | blk_queue_max_integrity_segments(ns->queue, 1); | |
583 | } | |
584 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
585 | static void nvme_dif_remap(struct request *req, | |
586 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
587 | { | |
588 | } | |
589 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) | |
590 | { | |
591 | } | |
592 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
593 | { | |
594 | } | |
595 | static void nvme_init_integrity(struct nvme_ns *ns) | |
596 | { | |
597 | } | |
598 | #endif | |
599 | ||
a4aea562 | 600 | static void req_completion(struct nvme_queue *nvmeq, void *ctx, |
b60503ba MW |
601 | struct nvme_completion *cqe) |
602 | { | |
eca18b23 | 603 | struct nvme_iod *iod = ctx; |
ac3dd5bd | 604 | struct request *req = iod_get_private(iod); |
a4aea562 MB |
605 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
606 | ||
b60503ba MW |
607 | u16 status = le16_to_cpup(&cqe->status) >> 1; |
608 | ||
edd10d33 | 609 | if (unlikely(status)) { |
a4aea562 MB |
610 | if (!(status & NVME_SC_DNR || blk_noretry_request(req)) |
611 | && (jiffies - req->start_time) < req->timeout) { | |
c9d3bf88 KB |
612 | unsigned long flags; |
613 | ||
a4aea562 | 614 | blk_mq_requeue_request(req); |
c9d3bf88 KB |
615 | spin_lock_irqsave(req->q->queue_lock, flags); |
616 | if (!blk_queue_stopped(req->q)) | |
617 | blk_mq_kick_requeue_list(req->q); | |
618 | spin_unlock_irqrestore(req->q->queue_lock, flags); | |
edd10d33 KB |
619 | return; |
620 | } | |
f4829a9b | 621 | |
d29ec824 | 622 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) { |
17188bb4 | 623 | if (cmd_rq->ctx == CMD_CTX_CANCELLED) |
f4829a9b | 624 | status = -EINTR; |
d29ec824 | 625 | } else { |
f4829a9b | 626 | status = nvme_error_status(status); |
d29ec824 | 627 | } |
f4829a9b CH |
628 | } |
629 | ||
a0a931d6 KB |
630 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) { |
631 | u32 result = le32_to_cpup(&cqe->result); | |
632 | req->special = (void *)(uintptr_t)result; | |
633 | } | |
a4aea562 MB |
634 | |
635 | if (cmd_rq->aborted) | |
e75ec752 | 636 | dev_warn(nvmeq->dev->dev, |
a4aea562 MB |
637 | "completing aborted command with status:%04x\n", |
638 | status); | |
639 | ||
e1e5e564 | 640 | if (iod->nents) { |
e75ec752 | 641 | dma_unmap_sg(nvmeq->dev->dev, iod->sg, iod->nents, |
a4aea562 | 642 | rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
e1e5e564 KB |
643 | if (blk_integrity_rq(req)) { |
644 | if (!rq_data_dir(req)) | |
645 | nvme_dif_remap(req, nvme_dif_complete); | |
e75ec752 | 646 | dma_unmap_sg(nvmeq->dev->dev, iod->meta_sg, 1, |
e1e5e564 KB |
647 | rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
648 | } | |
649 | } | |
edd10d33 | 650 | nvme_free_iod(nvmeq->dev, iod); |
3291fa57 | 651 | |
f4829a9b | 652 | blk_mq_complete_request(req, status); |
b60503ba MW |
653 | } |
654 | ||
184d2944 | 655 | /* length is in bytes. gfp flags indicates whether we may sleep. */ |
d29ec824 CH |
656 | static int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, |
657 | int total_len, gfp_t gfp) | |
ff22b54f | 658 | { |
99802a7a | 659 | struct dma_pool *pool; |
eca18b23 MW |
660 | int length = total_len; |
661 | struct scatterlist *sg = iod->sg; | |
ff22b54f MW |
662 | int dma_len = sg_dma_len(sg); |
663 | u64 dma_addr = sg_dma_address(sg); | |
f137e0f1 MI |
664 | u32 page_size = dev->page_size; |
665 | int offset = dma_addr & (page_size - 1); | |
e025344c | 666 | __le64 *prp_list; |
eca18b23 | 667 | __le64 **list = iod_list(iod); |
e025344c | 668 | dma_addr_t prp_dma; |
eca18b23 | 669 | int nprps, i; |
ff22b54f | 670 | |
1d090624 | 671 | length -= (page_size - offset); |
ff22b54f | 672 | if (length <= 0) |
eca18b23 | 673 | return total_len; |
ff22b54f | 674 | |
1d090624 | 675 | dma_len -= (page_size - offset); |
ff22b54f | 676 | if (dma_len) { |
1d090624 | 677 | dma_addr += (page_size - offset); |
ff22b54f MW |
678 | } else { |
679 | sg = sg_next(sg); | |
680 | dma_addr = sg_dma_address(sg); | |
681 | dma_len = sg_dma_len(sg); | |
682 | } | |
683 | ||
1d090624 | 684 | if (length <= page_size) { |
edd10d33 | 685 | iod->first_dma = dma_addr; |
eca18b23 | 686 | return total_len; |
e025344c SMM |
687 | } |
688 | ||
1d090624 | 689 | nprps = DIV_ROUND_UP(length, page_size); |
99802a7a MW |
690 | if (nprps <= (256 / 8)) { |
691 | pool = dev->prp_small_pool; | |
eca18b23 | 692 | iod->npages = 0; |
99802a7a MW |
693 | } else { |
694 | pool = dev->prp_page_pool; | |
eca18b23 | 695 | iod->npages = 1; |
99802a7a MW |
696 | } |
697 | ||
b77954cb MW |
698 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
699 | if (!prp_list) { | |
edd10d33 | 700 | iod->first_dma = dma_addr; |
eca18b23 | 701 | iod->npages = -1; |
1d090624 | 702 | return (total_len - length) + page_size; |
b77954cb | 703 | } |
eca18b23 MW |
704 | list[0] = prp_list; |
705 | iod->first_dma = prp_dma; | |
e025344c SMM |
706 | i = 0; |
707 | for (;;) { | |
1d090624 | 708 | if (i == page_size >> 3) { |
e025344c | 709 | __le64 *old_prp_list = prp_list; |
b77954cb | 710 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
eca18b23 MW |
711 | if (!prp_list) |
712 | return total_len - length; | |
713 | list[iod->npages++] = prp_list; | |
7523d834 MW |
714 | prp_list[0] = old_prp_list[i - 1]; |
715 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); | |
716 | i = 1; | |
e025344c SMM |
717 | } |
718 | prp_list[i++] = cpu_to_le64(dma_addr); | |
1d090624 KB |
719 | dma_len -= page_size; |
720 | dma_addr += page_size; | |
721 | length -= page_size; | |
e025344c SMM |
722 | if (length <= 0) |
723 | break; | |
724 | if (dma_len > 0) | |
725 | continue; | |
726 | BUG_ON(dma_len < 0); | |
727 | sg = sg_next(sg); | |
728 | dma_addr = sg_dma_address(sg); | |
729 | dma_len = sg_dma_len(sg); | |
ff22b54f MW |
730 | } |
731 | ||
eca18b23 | 732 | return total_len; |
ff22b54f MW |
733 | } |
734 | ||
d29ec824 CH |
735 | static void nvme_submit_priv(struct nvme_queue *nvmeq, struct request *req, |
736 | struct nvme_iod *iod) | |
737 | { | |
498c4394 | 738 | struct nvme_command cmnd; |
d29ec824 | 739 | |
498c4394 JD |
740 | memcpy(&cmnd, req->cmd, sizeof(cmnd)); |
741 | cmnd.rw.command_id = req->tag; | |
d29ec824 | 742 | if (req->nr_phys_segments) { |
498c4394 JD |
743 | cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
744 | cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); | |
d29ec824 CH |
745 | } |
746 | ||
498c4394 | 747 | __nvme_submit_cmd(nvmeq, &cmnd); |
d29ec824 CH |
748 | } |
749 | ||
a4aea562 MB |
750 | /* |
751 | * We reuse the small pool to allocate the 16-byte range here as it is not | |
752 | * worth having a special pool for these or additional cases to handle freeing | |
753 | * the iod. | |
754 | */ | |
755 | static void nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, | |
756 | struct request *req, struct nvme_iod *iod) | |
0e5e4f0e | 757 | { |
edd10d33 KB |
758 | struct nvme_dsm_range *range = |
759 | (struct nvme_dsm_range *)iod_list(iod)[0]; | |
498c4394 | 760 | struct nvme_command cmnd; |
0e5e4f0e | 761 | |
0e5e4f0e | 762 | range->cattr = cpu_to_le32(0); |
a4aea562 MB |
763 | range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); |
764 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
0e5e4f0e | 765 | |
498c4394 JD |
766 | memset(&cmnd, 0, sizeof(cmnd)); |
767 | cmnd.dsm.opcode = nvme_cmd_dsm; | |
768 | cmnd.dsm.command_id = req->tag; | |
769 | cmnd.dsm.nsid = cpu_to_le32(ns->ns_id); | |
770 | cmnd.dsm.prp1 = cpu_to_le64(iod->first_dma); | |
771 | cmnd.dsm.nr = 0; | |
772 | cmnd.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); | |
0e5e4f0e | 773 | |
498c4394 | 774 | __nvme_submit_cmd(nvmeq, &cmnd); |
0e5e4f0e KB |
775 | } |
776 | ||
a4aea562 | 777 | static void nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, |
00df5cb4 MW |
778 | int cmdid) |
779 | { | |
498c4394 | 780 | struct nvme_command cmnd; |
00df5cb4 | 781 | |
498c4394 JD |
782 | memset(&cmnd, 0, sizeof(cmnd)); |
783 | cmnd.common.opcode = nvme_cmd_flush; | |
784 | cmnd.common.command_id = cmdid; | |
785 | cmnd.common.nsid = cpu_to_le32(ns->ns_id); | |
00df5cb4 | 786 | |
498c4394 | 787 | __nvme_submit_cmd(nvmeq, &cmnd); |
00df5cb4 MW |
788 | } |
789 | ||
a4aea562 MB |
790 | static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod, |
791 | struct nvme_ns *ns) | |
b60503ba | 792 | { |
ac3dd5bd | 793 | struct request *req = iod_get_private(iod); |
498c4394 | 794 | struct nvme_command cmnd; |
a4aea562 MB |
795 | u16 control = 0; |
796 | u32 dsmgmt = 0; | |
00df5cb4 | 797 | |
a4aea562 | 798 | if (req->cmd_flags & REQ_FUA) |
b60503ba | 799 | control |= NVME_RW_FUA; |
a4aea562 | 800 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
b60503ba MW |
801 | control |= NVME_RW_LR; |
802 | ||
a4aea562 | 803 | if (req->cmd_flags & REQ_RAHEAD) |
b60503ba MW |
804 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
805 | ||
498c4394 JD |
806 | memset(&cmnd, 0, sizeof(cmnd)); |
807 | cmnd.rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); | |
808 | cmnd.rw.command_id = req->tag; | |
809 | cmnd.rw.nsid = cpu_to_le32(ns->ns_id); | |
810 | cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); | |
811 | cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); | |
812 | cmnd.rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); | |
813 | cmnd.rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); | |
b60503ba | 814 | |
e19b127f | 815 | if (ns->ms) { |
e1e5e564 KB |
816 | switch (ns->pi_type) { |
817 | case NVME_NS_DPS_PI_TYPE3: | |
818 | control |= NVME_RW_PRINFO_PRCHK_GUARD; | |
819 | break; | |
820 | case NVME_NS_DPS_PI_TYPE1: | |
821 | case NVME_NS_DPS_PI_TYPE2: | |
822 | control |= NVME_RW_PRINFO_PRCHK_GUARD | | |
823 | NVME_RW_PRINFO_PRCHK_REF; | |
498c4394 | 824 | cmnd.rw.reftag = cpu_to_le32( |
e1e5e564 KB |
825 | nvme_block_nr(ns, blk_rq_pos(req))); |
826 | break; | |
827 | } | |
e19b127f AP |
828 | if (blk_integrity_rq(req)) |
829 | cmnd.rw.metadata = | |
830 | cpu_to_le64(sg_dma_address(iod->meta_sg)); | |
831 | else | |
832 | control |= NVME_RW_PRINFO_PRACT; | |
833 | } | |
e1e5e564 | 834 | |
498c4394 JD |
835 | cmnd.rw.control = cpu_to_le16(control); |
836 | cmnd.rw.dsmgmt = cpu_to_le32(dsmgmt); | |
b60503ba | 837 | |
498c4394 | 838 | __nvme_submit_cmd(nvmeq, &cmnd); |
b60503ba | 839 | |
1974b1ae | 840 | return 0; |
edd10d33 KB |
841 | } |
842 | ||
d29ec824 CH |
843 | /* |
844 | * NOTE: ns is NULL when called on the admin queue. | |
845 | */ | |
a4aea562 MB |
846 | static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
847 | const struct blk_mq_queue_data *bd) | |
edd10d33 | 848 | { |
a4aea562 MB |
849 | struct nvme_ns *ns = hctx->queue->queuedata; |
850 | struct nvme_queue *nvmeq = hctx->driver_data; | |
d29ec824 | 851 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 MB |
852 | struct request *req = bd->rq; |
853 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); | |
edd10d33 | 854 | struct nvme_iod *iod; |
a4aea562 | 855 | enum dma_data_direction dma_dir; |
edd10d33 | 856 | |
e1e5e564 KB |
857 | /* |
858 | * If formated with metadata, require the block layer provide a buffer | |
859 | * unless this namespace is formated such that the metadata can be | |
860 | * stripped/generated by the controller with PRACT=1. | |
861 | */ | |
d29ec824 | 862 | if (ns && ns->ms && !blk_integrity_rq(req)) { |
71feb364 KB |
863 | if (!(ns->pi_type && ns->ms == 8) && |
864 | req->cmd_type != REQ_TYPE_DRV_PRIV) { | |
f4829a9b | 865 | blk_mq_complete_request(req, -EFAULT); |
e1e5e564 KB |
866 | return BLK_MQ_RQ_QUEUE_OK; |
867 | } | |
868 | } | |
869 | ||
d29ec824 | 870 | iod = nvme_alloc_iod(req, dev, GFP_ATOMIC); |
edd10d33 | 871 | if (!iod) |
fe54303e | 872 | return BLK_MQ_RQ_QUEUE_BUSY; |
a4aea562 | 873 | |
a4aea562 | 874 | if (req->cmd_flags & REQ_DISCARD) { |
edd10d33 KB |
875 | void *range; |
876 | /* | |
877 | * We reuse the small pool to allocate the 16-byte range here | |
878 | * as it is not worth having a special pool for these or | |
879 | * additional cases to handle freeing the iod. | |
880 | */ | |
d29ec824 | 881 | range = dma_pool_alloc(dev->prp_small_pool, GFP_ATOMIC, |
edd10d33 | 882 | &iod->first_dma); |
a4aea562 | 883 | if (!range) |
fe54303e | 884 | goto retry_cmd; |
edd10d33 KB |
885 | iod_list(iod)[0] = (__le64 *)range; |
886 | iod->npages = 0; | |
ac3dd5bd | 887 | } else if (req->nr_phys_segments) { |
a4aea562 MB |
888 | dma_dir = rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
889 | ||
ac3dd5bd | 890 | sg_init_table(iod->sg, req->nr_phys_segments); |
a4aea562 | 891 | iod->nents = blk_rq_map_sg(req->q, req, iod->sg); |
fe54303e JA |
892 | if (!iod->nents) |
893 | goto error_cmd; | |
a4aea562 MB |
894 | |
895 | if (!dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir)) | |
fe54303e | 896 | goto retry_cmd; |
a4aea562 | 897 | |
fe54303e | 898 | if (blk_rq_bytes(req) != |
d29ec824 CH |
899 | nvme_setup_prps(dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) { |
900 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
fe54303e JA |
901 | goto retry_cmd; |
902 | } | |
e1e5e564 KB |
903 | if (blk_integrity_rq(req)) { |
904 | if (blk_rq_count_integrity_sg(req->q, req->bio) != 1) | |
905 | goto error_cmd; | |
906 | ||
907 | sg_init_table(iod->meta_sg, 1); | |
908 | if (blk_rq_map_integrity_sg( | |
909 | req->q, req->bio, iod->meta_sg) != 1) | |
910 | goto error_cmd; | |
911 | ||
912 | if (rq_data_dir(req)) | |
913 | nvme_dif_remap(req, nvme_dif_prep); | |
914 | ||
915 | if (!dma_map_sg(nvmeq->q_dmadev, iod->meta_sg, 1, dma_dir)) | |
916 | goto error_cmd; | |
917 | } | |
edd10d33 | 918 | } |
1974b1ae | 919 | |
9af8785a | 920 | nvme_set_info(cmd, iod, req_completion); |
a4aea562 | 921 | spin_lock_irq(&nvmeq->q_lock); |
d29ec824 CH |
922 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) |
923 | nvme_submit_priv(nvmeq, req, iod); | |
924 | else if (req->cmd_flags & REQ_DISCARD) | |
a4aea562 MB |
925 | nvme_submit_discard(nvmeq, ns, req, iod); |
926 | else if (req->cmd_flags & REQ_FLUSH) | |
927 | nvme_submit_flush(nvmeq, ns, req->tag); | |
928 | else | |
929 | nvme_submit_iod(nvmeq, iod, ns); | |
930 | ||
931 | nvme_process_cq(nvmeq); | |
932 | spin_unlock_irq(&nvmeq->q_lock); | |
933 | return BLK_MQ_RQ_QUEUE_OK; | |
934 | ||
fe54303e | 935 | error_cmd: |
d29ec824 | 936 | nvme_free_iod(dev, iod); |
fe54303e JA |
937 | return BLK_MQ_RQ_QUEUE_ERROR; |
938 | retry_cmd: | |
d29ec824 | 939 | nvme_free_iod(dev, iod); |
fe54303e | 940 | return BLK_MQ_RQ_QUEUE_BUSY; |
b60503ba MW |
941 | } |
942 | ||
e9539f47 | 943 | static int nvme_process_cq(struct nvme_queue *nvmeq) |
b60503ba | 944 | { |
82123460 | 945 | u16 head, phase; |
b60503ba | 946 | |
b60503ba | 947 | head = nvmeq->cq_head; |
82123460 | 948 | phase = nvmeq->cq_phase; |
b60503ba MW |
949 | |
950 | for (;;) { | |
c2f5b650 MW |
951 | void *ctx; |
952 | nvme_completion_fn fn; | |
b60503ba | 953 | struct nvme_completion cqe = nvmeq->cqes[head]; |
82123460 | 954 | if ((le16_to_cpu(cqe.status) & 1) != phase) |
b60503ba MW |
955 | break; |
956 | nvmeq->sq_head = le16_to_cpu(cqe.sq_head); | |
957 | if (++head == nvmeq->q_depth) { | |
958 | head = 0; | |
82123460 | 959 | phase = !phase; |
b60503ba | 960 | } |
a4aea562 | 961 | ctx = nvme_finish_cmd(nvmeq, cqe.command_id, &fn); |
edd10d33 | 962 | fn(nvmeq, ctx, &cqe); |
b60503ba MW |
963 | } |
964 | ||
965 | /* If the controller ignores the cq head doorbell and continuously | |
966 | * writes to the queue, it is theoretically possible to wrap around | |
967 | * the queue twice and mistakenly return IRQ_NONE. Linux only | |
968 | * requires that 0.1% of your interrupts are handled, so this isn't | |
969 | * a big problem. | |
970 | */ | |
82123460 | 971 | if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) |
e9539f47 | 972 | return 0; |
b60503ba | 973 | |
b80d5ccc | 974 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); |
b60503ba | 975 | nvmeq->cq_head = head; |
82123460 | 976 | nvmeq->cq_phase = phase; |
b60503ba | 977 | |
e9539f47 MW |
978 | nvmeq->cqe_seen = 1; |
979 | return 1; | |
b60503ba MW |
980 | } |
981 | ||
982 | static irqreturn_t nvme_irq(int irq, void *data) | |
58ffacb5 MW |
983 | { |
984 | irqreturn_t result; | |
985 | struct nvme_queue *nvmeq = data; | |
986 | spin_lock(&nvmeq->q_lock); | |
e9539f47 MW |
987 | nvme_process_cq(nvmeq); |
988 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; | |
989 | nvmeq->cqe_seen = 0; | |
58ffacb5 MW |
990 | spin_unlock(&nvmeq->q_lock); |
991 | return result; | |
992 | } | |
993 | ||
994 | static irqreturn_t nvme_irq_check(int irq, void *data) | |
995 | { | |
996 | struct nvme_queue *nvmeq = data; | |
997 | struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; | |
998 | if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) | |
999 | return IRQ_NONE; | |
1000 | return IRQ_WAKE_THREAD; | |
1001 | } | |
1002 | ||
b60503ba MW |
1003 | /* |
1004 | * Returns 0 on success. If the result is negative, it's a Linux error code; | |
1005 | * if the result is positive, it's an NVM Express status code | |
1006 | */ | |
d29ec824 CH |
1007 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
1008 | void *buffer, void __user *ubuffer, unsigned bufflen, | |
1009 | u32 *result, unsigned timeout) | |
b60503ba | 1010 | { |
d29ec824 CH |
1011 | bool write = cmd->common.opcode & 1; |
1012 | struct bio *bio = NULL; | |
f705f837 | 1013 | struct request *req; |
d29ec824 | 1014 | int ret; |
b60503ba | 1015 | |
d29ec824 | 1016 | req = blk_mq_alloc_request(q, write, GFP_KERNEL, false); |
f705f837 CH |
1017 | if (IS_ERR(req)) |
1018 | return PTR_ERR(req); | |
b60503ba | 1019 | |
d29ec824 | 1020 | req->cmd_type = REQ_TYPE_DRV_PRIV; |
e112af0d | 1021 | req->cmd_flags |= REQ_FAILFAST_DRIVER; |
d29ec824 CH |
1022 | req->__data_len = 0; |
1023 | req->__sector = (sector_t) -1; | |
1024 | req->bio = req->biotail = NULL; | |
b60503ba | 1025 | |
f4ff414a | 1026 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
a4aea562 | 1027 | |
d29ec824 CH |
1028 | req->cmd = (unsigned char *)cmd; |
1029 | req->cmd_len = sizeof(struct nvme_command); | |
a0a931d6 | 1030 | req->special = (void *)0; |
b60503ba | 1031 | |
d29ec824 CH |
1032 | if (buffer && bufflen) { |
1033 | ret = blk_rq_map_kern(q, req, buffer, bufflen, __GFP_WAIT); | |
1034 | if (ret) | |
1035 | goto out; | |
1036 | } else if (ubuffer && bufflen) { | |
1037 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, __GFP_WAIT); | |
1038 | if (ret) | |
1039 | goto out; | |
1040 | bio = req->bio; | |
1041 | } | |
3c0cf138 | 1042 | |
d29ec824 CH |
1043 | blk_execute_rq(req->q, NULL, req, 0); |
1044 | if (bio) | |
1045 | blk_rq_unmap_user(bio); | |
b60503ba | 1046 | if (result) |
a0a931d6 | 1047 | *result = (u32)(uintptr_t)req->special; |
d29ec824 CH |
1048 | ret = req->errors; |
1049 | out: | |
f705f837 | 1050 | blk_mq_free_request(req); |
d29ec824 | 1051 | return ret; |
f705f837 CH |
1052 | } |
1053 | ||
d29ec824 CH |
1054 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
1055 | void *buffer, unsigned bufflen) | |
f705f837 | 1056 | { |
d29ec824 | 1057 | return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0); |
b60503ba MW |
1058 | } |
1059 | ||
a4aea562 MB |
1060 | static int nvme_submit_async_admin_req(struct nvme_dev *dev) |
1061 | { | |
1062 | struct nvme_queue *nvmeq = dev->queues[0]; | |
1063 | struct nvme_command c; | |
1064 | struct nvme_cmd_info *cmd_info; | |
1065 | struct request *req; | |
1066 | ||
1efccc9d | 1067 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, true); |
9f173b33 DC |
1068 | if (IS_ERR(req)) |
1069 | return PTR_ERR(req); | |
a4aea562 | 1070 | |
c917dfe5 | 1071 | req->cmd_flags |= REQ_NO_TIMEOUT; |
a4aea562 | 1072 | cmd_info = blk_mq_rq_to_pdu(req); |
1efccc9d | 1073 | nvme_set_info(cmd_info, NULL, async_req_completion); |
a4aea562 MB |
1074 | |
1075 | memset(&c, 0, sizeof(c)); | |
1076 | c.common.opcode = nvme_admin_async_event; | |
1077 | c.common.command_id = req->tag; | |
1078 | ||
42483228 | 1079 | blk_mq_free_request(req); |
e3f879bf SB |
1080 | __nvme_submit_cmd(nvmeq, &c); |
1081 | return 0; | |
a4aea562 MB |
1082 | } |
1083 | ||
1084 | static int nvme_submit_admin_async_cmd(struct nvme_dev *dev, | |
4d115420 KB |
1085 | struct nvme_command *cmd, |
1086 | struct async_cmd_info *cmdinfo, unsigned timeout) | |
1087 | { | |
a4aea562 MB |
1088 | struct nvme_queue *nvmeq = dev->queues[0]; |
1089 | struct request *req; | |
1090 | struct nvme_cmd_info *cmd_rq; | |
4d115420 | 1091 | |
a4aea562 | 1092 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_KERNEL, false); |
9f173b33 DC |
1093 | if (IS_ERR(req)) |
1094 | return PTR_ERR(req); | |
a4aea562 MB |
1095 | |
1096 | req->timeout = timeout; | |
1097 | cmd_rq = blk_mq_rq_to_pdu(req); | |
1098 | cmdinfo->req = req; | |
1099 | nvme_set_info(cmd_rq, cmdinfo, async_completion); | |
4d115420 | 1100 | cmdinfo->status = -EINTR; |
a4aea562 MB |
1101 | |
1102 | cmd->common.command_id = req->tag; | |
1103 | ||
e3f879bf SB |
1104 | nvme_submit_cmd(nvmeq, cmd); |
1105 | return 0; | |
4d115420 KB |
1106 | } |
1107 | ||
b60503ba MW |
1108 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
1109 | { | |
b60503ba MW |
1110 | struct nvme_command c; |
1111 | ||
1112 | memset(&c, 0, sizeof(c)); | |
1113 | c.delete_queue.opcode = opcode; | |
1114 | c.delete_queue.qid = cpu_to_le16(id); | |
1115 | ||
d29ec824 | 1116 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1117 | } |
1118 | ||
1119 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, | |
1120 | struct nvme_queue *nvmeq) | |
1121 | { | |
b60503ba MW |
1122 | struct nvme_command c; |
1123 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; | |
1124 | ||
d29ec824 CH |
1125 | /* |
1126 | * Note: we (ab)use the fact the the prp fields survive if no data | |
1127 | * is attached to the request. | |
1128 | */ | |
b60503ba MW |
1129 | memset(&c, 0, sizeof(c)); |
1130 | c.create_cq.opcode = nvme_admin_create_cq; | |
1131 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); | |
1132 | c.create_cq.cqid = cpu_to_le16(qid); | |
1133 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1134 | c.create_cq.cq_flags = cpu_to_le16(flags); | |
1135 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); | |
1136 | ||
d29ec824 | 1137 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1138 | } |
1139 | ||
1140 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, | |
1141 | struct nvme_queue *nvmeq) | |
1142 | { | |
b60503ba MW |
1143 | struct nvme_command c; |
1144 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; | |
1145 | ||
d29ec824 CH |
1146 | /* |
1147 | * Note: we (ab)use the fact the the prp fields survive if no data | |
1148 | * is attached to the request. | |
1149 | */ | |
b60503ba MW |
1150 | memset(&c, 0, sizeof(c)); |
1151 | c.create_sq.opcode = nvme_admin_create_sq; | |
1152 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); | |
1153 | c.create_sq.sqid = cpu_to_le16(qid); | |
1154 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1155 | c.create_sq.sq_flags = cpu_to_le16(flags); | |
1156 | c.create_sq.cqid = cpu_to_le16(qid); | |
1157 | ||
d29ec824 | 1158 | return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); |
b60503ba MW |
1159 | } |
1160 | ||
1161 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) | |
1162 | { | |
1163 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); | |
1164 | } | |
1165 | ||
1166 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) | |
1167 | { | |
1168 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); | |
1169 | } | |
1170 | ||
d29ec824 | 1171 | int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id) |
bc5fc7e4 | 1172 | { |
e44ac588 | 1173 | struct nvme_command c = { }; |
d29ec824 | 1174 | int error; |
bc5fc7e4 | 1175 | |
e44ac588 AM |
1176 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
1177 | c.identify.opcode = nvme_admin_identify; | |
1178 | c.identify.cns = cpu_to_le32(1); | |
1179 | ||
d29ec824 CH |
1180 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); |
1181 | if (!*id) | |
1182 | return -ENOMEM; | |
bc5fc7e4 | 1183 | |
d29ec824 CH |
1184 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, |
1185 | sizeof(struct nvme_id_ctrl)); | |
1186 | if (error) | |
1187 | kfree(*id); | |
1188 | return error; | |
1189 | } | |
1190 | ||
1191 | int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid, | |
1192 | struct nvme_id_ns **id) | |
1193 | { | |
e44ac588 | 1194 | struct nvme_command c = { }; |
d29ec824 | 1195 | int error; |
bc5fc7e4 | 1196 | |
e44ac588 AM |
1197 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
1198 | c.identify.opcode = nvme_admin_identify, | |
1199 | c.identify.nsid = cpu_to_le32(nsid), | |
1200 | ||
d29ec824 CH |
1201 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); |
1202 | if (!*id) | |
1203 | return -ENOMEM; | |
1204 | ||
1205 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, | |
1206 | sizeof(struct nvme_id_ns)); | |
1207 | if (error) | |
1208 | kfree(*id); | |
1209 | return error; | |
bc5fc7e4 MW |
1210 | } |
1211 | ||
5d0f6131 | 1212 | int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, |
08df1e05 | 1213 | dma_addr_t dma_addr, u32 *result) |
bc5fc7e4 MW |
1214 | { |
1215 | struct nvme_command c; | |
1216 | ||
1217 | memset(&c, 0, sizeof(c)); | |
1218 | c.features.opcode = nvme_admin_get_features; | |
a42cecce | 1219 | c.features.nsid = cpu_to_le32(nsid); |
bc5fc7e4 MW |
1220 | c.features.prp1 = cpu_to_le64(dma_addr); |
1221 | c.features.fid = cpu_to_le32(fid); | |
bc5fc7e4 | 1222 | |
d29ec824 CH |
1223 | return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, |
1224 | result, 0); | |
df348139 MW |
1225 | } |
1226 | ||
5d0f6131 VV |
1227 | int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, |
1228 | dma_addr_t dma_addr, u32 *result) | |
df348139 MW |
1229 | { |
1230 | struct nvme_command c; | |
1231 | ||
1232 | memset(&c, 0, sizeof(c)); | |
1233 | c.features.opcode = nvme_admin_set_features; | |
1234 | c.features.prp1 = cpu_to_le64(dma_addr); | |
1235 | c.features.fid = cpu_to_le32(fid); | |
1236 | c.features.dword11 = cpu_to_le32(dword11); | |
1237 | ||
d29ec824 CH |
1238 | return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, |
1239 | result, 0); | |
1240 | } | |
1241 | ||
1242 | int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log) | |
1243 | { | |
e44ac588 AM |
1244 | struct nvme_command c = { }; |
1245 | int error; | |
1246 | ||
1247 | c.common.opcode = nvme_admin_get_log_page, | |
1248 | c.common.nsid = cpu_to_le32(0xFFFFFFFF), | |
1249 | c.common.cdw10[0] = cpu_to_le32( | |
d29ec824 CH |
1250 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | |
1251 | NVME_LOG_SMART), | |
d29ec824 CH |
1252 | |
1253 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); | |
1254 | if (!*log) | |
1255 | return -ENOMEM; | |
1256 | ||
1257 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, | |
1258 | sizeof(struct nvme_smart_log)); | |
1259 | if (error) | |
1260 | kfree(*log); | |
1261 | return error; | |
bc5fc7e4 MW |
1262 | } |
1263 | ||
c30341dc | 1264 | /** |
a4aea562 | 1265 | * nvme_abort_req - Attempt aborting a request |
c30341dc KB |
1266 | * |
1267 | * Schedule controller reset if the command was already aborted once before and | |
1268 | * still hasn't been returned to the driver, or if this is the admin queue. | |
1269 | */ | |
a4aea562 | 1270 | static void nvme_abort_req(struct request *req) |
c30341dc | 1271 | { |
a4aea562 MB |
1272 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
1273 | struct nvme_queue *nvmeq = cmd_rq->nvmeq; | |
c30341dc | 1274 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 MB |
1275 | struct request *abort_req; |
1276 | struct nvme_cmd_info *abort_cmd; | |
1277 | struct nvme_command cmd; | |
c30341dc | 1278 | |
a4aea562 | 1279 | if (!nvmeq->qid || cmd_rq->aborted) { |
7a509a6b KB |
1280 | unsigned long flags; |
1281 | ||
1282 | spin_lock_irqsave(&dev_list_lock, flags); | |
c30341dc | 1283 | if (work_busy(&dev->reset_work)) |
7a509a6b | 1284 | goto out; |
c30341dc | 1285 | list_del_init(&dev->node); |
e75ec752 | 1286 | dev_warn(dev->dev, "I/O %d QID %d timeout, reset controller\n", |
a4aea562 | 1287 | req->tag, nvmeq->qid); |
c30341dc | 1288 | queue_work(nvme_workq, &dev->reset_work); |
7a509a6b KB |
1289 | out: |
1290 | spin_unlock_irqrestore(&dev_list_lock, flags); | |
c30341dc KB |
1291 | return; |
1292 | } | |
1293 | ||
1294 | if (!dev->abort_limit) | |
1295 | return; | |
1296 | ||
a4aea562 MB |
1297 | abort_req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, |
1298 | false); | |
9f173b33 | 1299 | if (IS_ERR(abort_req)) |
c30341dc KB |
1300 | return; |
1301 | ||
a4aea562 MB |
1302 | abort_cmd = blk_mq_rq_to_pdu(abort_req); |
1303 | nvme_set_info(abort_cmd, abort_req, abort_completion); | |
1304 | ||
c30341dc KB |
1305 | memset(&cmd, 0, sizeof(cmd)); |
1306 | cmd.abort.opcode = nvme_admin_abort_cmd; | |
a4aea562 | 1307 | cmd.abort.cid = req->tag; |
c30341dc | 1308 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
a4aea562 | 1309 | cmd.abort.command_id = abort_req->tag; |
c30341dc KB |
1310 | |
1311 | --dev->abort_limit; | |
a4aea562 | 1312 | cmd_rq->aborted = 1; |
c30341dc | 1313 | |
a4aea562 | 1314 | dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", req->tag, |
c30341dc | 1315 | nvmeq->qid); |
e3f879bf | 1316 | nvme_submit_cmd(dev->queues[0], &cmd); |
c30341dc KB |
1317 | } |
1318 | ||
42483228 | 1319 | static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) |
a09115b2 | 1320 | { |
a4aea562 MB |
1321 | struct nvme_queue *nvmeq = data; |
1322 | void *ctx; | |
1323 | nvme_completion_fn fn; | |
1324 | struct nvme_cmd_info *cmd; | |
cef6a948 KB |
1325 | struct nvme_completion cqe; |
1326 | ||
1327 | if (!blk_mq_request_started(req)) | |
1328 | return; | |
a09115b2 | 1329 | |
a4aea562 | 1330 | cmd = blk_mq_rq_to_pdu(req); |
a09115b2 | 1331 | |
a4aea562 MB |
1332 | if (cmd->ctx == CMD_CTX_CANCELLED) |
1333 | return; | |
1334 | ||
cef6a948 KB |
1335 | if (blk_queue_dying(req->q)) |
1336 | cqe.status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); | |
1337 | else | |
1338 | cqe.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); | |
1339 | ||
1340 | ||
a4aea562 MB |
1341 | dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", |
1342 | req->tag, nvmeq->qid); | |
1343 | ctx = cancel_cmd_info(cmd, &fn); | |
1344 | fn(nvmeq, ctx, &cqe); | |
a09115b2 MW |
1345 | } |
1346 | ||
a4aea562 | 1347 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
9e866774 | 1348 | { |
a4aea562 MB |
1349 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
1350 | struct nvme_queue *nvmeq = cmd->nvmeq; | |
1351 | ||
1352 | dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag, | |
1353 | nvmeq->qid); | |
7a509a6b | 1354 | spin_lock_irq(&nvmeq->q_lock); |
07836e65 | 1355 | nvme_abort_req(req); |
7a509a6b | 1356 | spin_unlock_irq(&nvmeq->q_lock); |
a4aea562 | 1357 | |
07836e65 KB |
1358 | /* |
1359 | * The aborted req will be completed on receiving the abort req. | |
1360 | * We enable the timer again. If hit twice, it'll cause a device reset, | |
1361 | * as the device then is in a faulty state. | |
1362 | */ | |
1363 | return BLK_EH_RESET_TIMER; | |
a4aea562 | 1364 | } |
22404274 | 1365 | |
a4aea562 MB |
1366 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
1367 | { | |
9e866774 MW |
1368 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
1369 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); | |
8ffaadf7 JD |
1370 | if (nvmeq->sq_cmds) |
1371 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), | |
9e866774 MW |
1372 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); |
1373 | kfree(nvmeq); | |
1374 | } | |
1375 | ||
a1a5ef99 | 1376 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
22404274 KB |
1377 | { |
1378 | int i; | |
1379 | ||
a1a5ef99 | 1380 | for (i = dev->queue_count - 1; i >= lowest; i--) { |
a4aea562 | 1381 | struct nvme_queue *nvmeq = dev->queues[i]; |
22404274 | 1382 | dev->queue_count--; |
a4aea562 | 1383 | dev->queues[i] = NULL; |
f435c282 | 1384 | nvme_free_queue(nvmeq); |
121c7ad4 | 1385 | } |
22404274 KB |
1386 | } |
1387 | ||
4d115420 KB |
1388 | /** |
1389 | * nvme_suspend_queue - put queue into suspended state | |
1390 | * @nvmeq - queue to suspend | |
4d115420 KB |
1391 | */ |
1392 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) | |
b60503ba | 1393 | { |
2b25d981 | 1394 | int vector; |
b60503ba | 1395 | |
a09115b2 | 1396 | spin_lock_irq(&nvmeq->q_lock); |
2b25d981 KB |
1397 | if (nvmeq->cq_vector == -1) { |
1398 | spin_unlock_irq(&nvmeq->q_lock); | |
1399 | return 1; | |
1400 | } | |
1401 | vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; | |
42f61420 | 1402 | nvmeq->dev->online_queues--; |
2b25d981 | 1403 | nvmeq->cq_vector = -1; |
a09115b2 MW |
1404 | spin_unlock_irq(&nvmeq->q_lock); |
1405 | ||
6df3dbc8 KB |
1406 | if (!nvmeq->qid && nvmeq->dev->admin_q) |
1407 | blk_mq_freeze_queue_start(nvmeq->dev->admin_q); | |
1408 | ||
aba2080f MW |
1409 | irq_set_affinity_hint(vector, NULL); |
1410 | free_irq(vector, nvmeq); | |
b60503ba | 1411 | |
4d115420 KB |
1412 | return 0; |
1413 | } | |
b60503ba | 1414 | |
4d115420 KB |
1415 | static void nvme_clear_queue(struct nvme_queue *nvmeq) |
1416 | { | |
22404274 | 1417 | spin_lock_irq(&nvmeq->q_lock); |
42483228 KB |
1418 | if (nvmeq->tags && *nvmeq->tags) |
1419 | blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); | |
22404274 | 1420 | spin_unlock_irq(&nvmeq->q_lock); |
b60503ba MW |
1421 | } |
1422 | ||
4d115420 KB |
1423 | static void nvme_disable_queue(struct nvme_dev *dev, int qid) |
1424 | { | |
a4aea562 | 1425 | struct nvme_queue *nvmeq = dev->queues[qid]; |
4d115420 KB |
1426 | |
1427 | if (!nvmeq) | |
1428 | return; | |
1429 | if (nvme_suspend_queue(nvmeq)) | |
1430 | return; | |
1431 | ||
0e53d180 KB |
1432 | /* Don't tell the adapter to delete the admin queue. |
1433 | * Don't tell a removed adapter to delete IO queues. */ | |
1434 | if (qid && readl(&dev->bar->csts) != -1) { | |
b60503ba MW |
1435 | adapter_delete_sq(dev, qid); |
1436 | adapter_delete_cq(dev, qid); | |
1437 | } | |
07836e65 KB |
1438 | |
1439 | spin_lock_irq(&nvmeq->q_lock); | |
1440 | nvme_process_cq(nvmeq); | |
1441 | spin_unlock_irq(&nvmeq->q_lock); | |
b60503ba MW |
1442 | } |
1443 | ||
8ffaadf7 JD |
1444 | static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, |
1445 | int entry_size) | |
1446 | { | |
1447 | int q_depth = dev->q_depth; | |
1448 | unsigned q_size_aligned = roundup(q_depth * entry_size, dev->page_size); | |
1449 | ||
1450 | if (q_size_aligned * nr_io_queues > dev->cmb_size) { | |
c45f5c99 JD |
1451 | u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); |
1452 | mem_per_q = round_down(mem_per_q, dev->page_size); | |
1453 | q_depth = div_u64(mem_per_q, entry_size); | |
8ffaadf7 JD |
1454 | |
1455 | /* | |
1456 | * Ensure the reduced q_depth is above some threshold where it | |
1457 | * would be better to map queues in system memory with the | |
1458 | * original depth | |
1459 | */ | |
1460 | if (q_depth < 64) | |
1461 | return -ENOMEM; | |
1462 | } | |
1463 | ||
1464 | return q_depth; | |
1465 | } | |
1466 | ||
1467 | static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, | |
1468 | int qid, int depth) | |
1469 | { | |
1470 | if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { | |
1471 | unsigned offset = (qid - 1) * | |
1472 | roundup(SQ_SIZE(depth), dev->page_size); | |
1473 | nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; | |
1474 | nvmeq->sq_cmds_io = dev->cmb + offset; | |
1475 | } else { | |
1476 | nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), | |
1477 | &nvmeq->sq_dma_addr, GFP_KERNEL); | |
1478 | if (!nvmeq->sq_cmds) | |
1479 | return -ENOMEM; | |
1480 | } | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
b60503ba | 1485 | static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, |
2b25d981 | 1486 | int depth) |
b60503ba | 1487 | { |
a4aea562 | 1488 | struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); |
b60503ba MW |
1489 | if (!nvmeq) |
1490 | return NULL; | |
1491 | ||
e75ec752 | 1492 | nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), |
4d51abf9 | 1493 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
b60503ba MW |
1494 | if (!nvmeq->cqes) |
1495 | goto free_nvmeq; | |
b60503ba | 1496 | |
8ffaadf7 | 1497 | if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) |
b60503ba MW |
1498 | goto free_cqdma; |
1499 | ||
e75ec752 | 1500 | nvmeq->q_dmadev = dev->dev; |
091b6092 | 1501 | nvmeq->dev = dev; |
3193f07b MW |
1502 | snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", |
1503 | dev->instance, qid); | |
b60503ba MW |
1504 | spin_lock_init(&nvmeq->q_lock); |
1505 | nvmeq->cq_head = 0; | |
82123460 | 1506 | nvmeq->cq_phase = 1; |
b80d5ccc | 1507 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
b60503ba | 1508 | nvmeq->q_depth = depth; |
c30341dc | 1509 | nvmeq->qid = qid; |
758dd7fd | 1510 | nvmeq->cq_vector = -1; |
a4aea562 | 1511 | dev->queues[qid] = nvmeq; |
b60503ba | 1512 | |
36a7e993 JD |
1513 | /* make sure queue descriptor is set before queue count, for kthread */ |
1514 | mb(); | |
1515 | dev->queue_count++; | |
1516 | ||
b60503ba MW |
1517 | return nvmeq; |
1518 | ||
1519 | free_cqdma: | |
e75ec752 | 1520 | dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
b60503ba MW |
1521 | nvmeq->cq_dma_addr); |
1522 | free_nvmeq: | |
1523 | kfree(nvmeq); | |
1524 | return NULL; | |
1525 | } | |
1526 | ||
3001082c MW |
1527 | static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, |
1528 | const char *name) | |
1529 | { | |
58ffacb5 MW |
1530 | if (use_threaded_interrupts) |
1531 | return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, | |
481e5bad | 1532 | nvme_irq_check, nvme_irq, IRQF_SHARED, |
58ffacb5 | 1533 | name, nvmeq); |
3001082c | 1534 | return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, |
481e5bad | 1535 | IRQF_SHARED, name, nvmeq); |
3001082c MW |
1536 | } |
1537 | ||
22404274 | 1538 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
b60503ba | 1539 | { |
22404274 | 1540 | struct nvme_dev *dev = nvmeq->dev; |
b60503ba | 1541 | |
7be50e93 | 1542 | spin_lock_irq(&nvmeq->q_lock); |
22404274 KB |
1543 | nvmeq->sq_tail = 0; |
1544 | nvmeq->cq_head = 0; | |
1545 | nvmeq->cq_phase = 1; | |
b80d5ccc | 1546 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
22404274 | 1547 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
42f61420 | 1548 | dev->online_queues++; |
7be50e93 | 1549 | spin_unlock_irq(&nvmeq->q_lock); |
22404274 KB |
1550 | } |
1551 | ||
1552 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) | |
1553 | { | |
1554 | struct nvme_dev *dev = nvmeq->dev; | |
1555 | int result; | |
3f85d50b | 1556 | |
2b25d981 | 1557 | nvmeq->cq_vector = qid - 1; |
b60503ba MW |
1558 | result = adapter_alloc_cq(dev, qid, nvmeq); |
1559 | if (result < 0) | |
22404274 | 1560 | return result; |
b60503ba MW |
1561 | |
1562 | result = adapter_alloc_sq(dev, qid, nvmeq); | |
1563 | if (result < 0) | |
1564 | goto release_cq; | |
1565 | ||
3193f07b | 1566 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
b60503ba MW |
1567 | if (result < 0) |
1568 | goto release_sq; | |
1569 | ||
22404274 | 1570 | nvme_init_queue(nvmeq, qid); |
22404274 | 1571 | return result; |
b60503ba MW |
1572 | |
1573 | release_sq: | |
1574 | adapter_delete_sq(dev, qid); | |
1575 | release_cq: | |
1576 | adapter_delete_cq(dev, qid); | |
22404274 | 1577 | return result; |
b60503ba MW |
1578 | } |
1579 | ||
ba47e386 MW |
1580 | static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) |
1581 | { | |
1582 | unsigned long timeout; | |
1583 | u32 bit = enabled ? NVME_CSTS_RDY : 0; | |
1584 | ||
1585 | timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; | |
1586 | ||
1587 | while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { | |
1588 | msleep(100); | |
1589 | if (fatal_signal_pending(current)) | |
1590 | return -EINTR; | |
1591 | if (time_after(jiffies, timeout)) { | |
e75ec752 | 1592 | dev_err(dev->dev, |
27e8166c MW |
1593 | "Device not ready; aborting %s\n", enabled ? |
1594 | "initialisation" : "reset"); | |
ba47e386 MW |
1595 | return -ENODEV; |
1596 | } | |
1597 | } | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * If the device has been passed off to us in an enabled state, just clear | |
1604 | * the enabled bit. The spec says we should set the 'shutdown notification | |
1605 | * bits', but doing so may cause the device to complete commands to the | |
1606 | * admin queue ... and we don't know what memory that might be pointing at! | |
1607 | */ | |
1608 | static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) | |
1609 | { | |
01079522 DM |
1610 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1611 | dev->ctrl_config &= ~NVME_CC_ENABLE; | |
1612 | writel(dev->ctrl_config, &dev->bar->cc); | |
44af146a | 1613 | |
ba47e386 MW |
1614 | return nvme_wait_ready(dev, cap, false); |
1615 | } | |
1616 | ||
1617 | static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) | |
1618 | { | |
01079522 DM |
1619 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1620 | dev->ctrl_config |= NVME_CC_ENABLE; | |
1621 | writel(dev->ctrl_config, &dev->bar->cc); | |
1622 | ||
ba47e386 MW |
1623 | return nvme_wait_ready(dev, cap, true); |
1624 | } | |
1625 | ||
1894d8f1 KB |
1626 | static int nvme_shutdown_ctrl(struct nvme_dev *dev) |
1627 | { | |
1628 | unsigned long timeout; | |
1894d8f1 | 1629 | |
01079522 DM |
1630 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
1631 | dev->ctrl_config |= NVME_CC_SHN_NORMAL; | |
1632 | ||
1633 | writel(dev->ctrl_config, &dev->bar->cc); | |
1894d8f1 | 1634 | |
2484f407 | 1635 | timeout = SHUTDOWN_TIMEOUT + jiffies; |
1894d8f1 KB |
1636 | while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != |
1637 | NVME_CSTS_SHST_CMPLT) { | |
1638 | msleep(100); | |
1639 | if (fatal_signal_pending(current)) | |
1640 | return -EINTR; | |
1641 | if (time_after(jiffies, timeout)) { | |
e75ec752 | 1642 | dev_err(dev->dev, |
1894d8f1 KB |
1643 | "Device shutdown incomplete; abort shutdown\n"); |
1644 | return -ENODEV; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | return 0; | |
1649 | } | |
1650 | ||
a4aea562 | 1651 | static struct blk_mq_ops nvme_mq_admin_ops = { |
d29ec824 | 1652 | .queue_rq = nvme_queue_rq, |
a4aea562 MB |
1653 | .map_queue = blk_mq_map_queue, |
1654 | .init_hctx = nvme_admin_init_hctx, | |
4af0e21c | 1655 | .exit_hctx = nvme_admin_exit_hctx, |
a4aea562 MB |
1656 | .init_request = nvme_admin_init_request, |
1657 | .timeout = nvme_timeout, | |
1658 | }; | |
1659 | ||
1660 | static struct blk_mq_ops nvme_mq_ops = { | |
1661 | .queue_rq = nvme_queue_rq, | |
1662 | .map_queue = blk_mq_map_queue, | |
1663 | .init_hctx = nvme_init_hctx, | |
1664 | .init_request = nvme_init_request, | |
1665 | .timeout = nvme_timeout, | |
1666 | }; | |
1667 | ||
ea191d2f KB |
1668 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
1669 | { | |
1670 | if (dev->admin_q && !blk_queue_dying(dev->admin_q)) { | |
1671 | blk_cleanup_queue(dev->admin_q); | |
1672 | blk_mq_free_tag_set(&dev->admin_tagset); | |
1673 | } | |
1674 | } | |
1675 | ||
a4aea562 MB |
1676 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
1677 | { | |
1678 | if (!dev->admin_q) { | |
1679 | dev->admin_tagset.ops = &nvme_mq_admin_ops; | |
1680 | dev->admin_tagset.nr_hw_queues = 1; | |
1681 | dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1; | |
1efccc9d | 1682 | dev->admin_tagset.reserved_tags = 1; |
a4aea562 | 1683 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
e75ec752 | 1684 | dev->admin_tagset.numa_node = dev_to_node(dev->dev); |
ac3dd5bd | 1685 | dev->admin_tagset.cmd_size = nvme_cmd_size(dev); |
a4aea562 MB |
1686 | dev->admin_tagset.driver_data = dev; |
1687 | ||
1688 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) | |
1689 | return -ENOMEM; | |
1690 | ||
1691 | dev->admin_q = blk_mq_init_queue(&dev->admin_tagset); | |
35b489d3 | 1692 | if (IS_ERR(dev->admin_q)) { |
a4aea562 MB |
1693 | blk_mq_free_tag_set(&dev->admin_tagset); |
1694 | return -ENOMEM; | |
1695 | } | |
ea191d2f KB |
1696 | if (!blk_get_queue(dev->admin_q)) { |
1697 | nvme_dev_remove_admin(dev); | |
4af0e21c | 1698 | dev->admin_q = NULL; |
ea191d2f KB |
1699 | return -ENODEV; |
1700 | } | |
0fb59cbc KB |
1701 | } else |
1702 | blk_mq_unfreeze_queue(dev->admin_q); | |
a4aea562 MB |
1703 | |
1704 | return 0; | |
1705 | } | |
1706 | ||
8d85fce7 | 1707 | static int nvme_configure_admin_queue(struct nvme_dev *dev) |
b60503ba | 1708 | { |
ba47e386 | 1709 | int result; |
b60503ba | 1710 | u32 aqa; |
ba47e386 | 1711 | u64 cap = readq(&dev->bar->cap); |
b60503ba | 1712 | struct nvme_queue *nvmeq; |
1d090624 KB |
1713 | unsigned page_shift = PAGE_SHIFT; |
1714 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; | |
1715 | unsigned dev_page_max = NVME_CAP_MPSMAX(cap) + 12; | |
1716 | ||
1717 | if (page_shift < dev_page_min) { | |
e75ec752 | 1718 | dev_err(dev->dev, |
1d090624 KB |
1719 | "Minimum device page size (%u) too large for " |
1720 | "host (%u)\n", 1 << dev_page_min, | |
1721 | 1 << page_shift); | |
1722 | return -ENODEV; | |
1723 | } | |
1724 | if (page_shift > dev_page_max) { | |
e75ec752 | 1725 | dev_info(dev->dev, |
1d090624 KB |
1726 | "Device maximum page size (%u) smaller than " |
1727 | "host (%u); enabling work-around\n", | |
1728 | 1 << dev_page_max, 1 << page_shift); | |
1729 | page_shift = dev_page_max; | |
1730 | } | |
b60503ba | 1731 | |
dfbac8c7 KB |
1732 | dev->subsystem = readl(&dev->bar->vs) >= NVME_VS(1, 1) ? |
1733 | NVME_CAP_NSSRC(cap) : 0; | |
1734 | ||
1735 | if (dev->subsystem && (readl(&dev->bar->csts) & NVME_CSTS_NSSRO)) | |
1736 | writel(NVME_CSTS_NSSRO, &dev->bar->csts); | |
1737 | ||
ba47e386 MW |
1738 | result = nvme_disable_ctrl(dev, cap); |
1739 | if (result < 0) | |
1740 | return result; | |
b60503ba | 1741 | |
a4aea562 | 1742 | nvmeq = dev->queues[0]; |
cd638946 | 1743 | if (!nvmeq) { |
2b25d981 | 1744 | nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); |
cd638946 KB |
1745 | if (!nvmeq) |
1746 | return -ENOMEM; | |
cd638946 | 1747 | } |
b60503ba MW |
1748 | |
1749 | aqa = nvmeq->q_depth - 1; | |
1750 | aqa |= aqa << 16; | |
1751 | ||
1d090624 KB |
1752 | dev->page_size = 1 << page_shift; |
1753 | ||
01079522 | 1754 | dev->ctrl_config = NVME_CC_CSS_NVM; |
1d090624 | 1755 | dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; |
b60503ba | 1756 | dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; |
7f53f9d2 | 1757 | dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
b60503ba MW |
1758 | |
1759 | writel(aqa, &dev->bar->aqa); | |
1760 | writeq(nvmeq->sq_dma_addr, &dev->bar->asq); | |
1761 | writeq(nvmeq->cq_dma_addr, &dev->bar->acq); | |
b60503ba | 1762 | |
ba47e386 | 1763 | result = nvme_enable_ctrl(dev, cap); |
025c557a | 1764 | if (result) |
a4aea562 MB |
1765 | goto free_nvmeq; |
1766 | ||
2b25d981 | 1767 | nvmeq->cq_vector = 0; |
3193f07b | 1768 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
758dd7fd JD |
1769 | if (result) { |
1770 | nvmeq->cq_vector = -1; | |
0fb59cbc | 1771 | goto free_nvmeq; |
758dd7fd | 1772 | } |
025c557a | 1773 | |
b60503ba | 1774 | return result; |
a4aea562 | 1775 | |
a4aea562 MB |
1776 | free_nvmeq: |
1777 | nvme_free_queues(dev, 0); | |
1778 | return result; | |
b60503ba MW |
1779 | } |
1780 | ||
a53295b6 MW |
1781 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
1782 | { | |
1783 | struct nvme_dev *dev = ns->dev; | |
a53295b6 MW |
1784 | struct nvme_user_io io; |
1785 | struct nvme_command c; | |
d29ec824 | 1786 | unsigned length, meta_len; |
a67a9513 | 1787 | int status, write; |
a67a9513 KB |
1788 | dma_addr_t meta_dma = 0; |
1789 | void *meta = NULL; | |
fec558b5 | 1790 | void __user *metadata; |
a53295b6 MW |
1791 | |
1792 | if (copy_from_user(&io, uio, sizeof(io))) | |
1793 | return -EFAULT; | |
6c7d4945 MW |
1794 | |
1795 | switch (io.opcode) { | |
1796 | case nvme_cmd_write: | |
1797 | case nvme_cmd_read: | |
6bbf1acd | 1798 | case nvme_cmd_compare: |
6413214c | 1799 | break; |
6c7d4945 | 1800 | default: |
6bbf1acd | 1801 | return -EINVAL; |
6c7d4945 MW |
1802 | } |
1803 | ||
d29ec824 CH |
1804 | length = (io.nblocks + 1) << ns->lba_shift; |
1805 | meta_len = (io.nblocks + 1) * ns->ms; | |
6a398a3e | 1806 | metadata = (void __user *)(unsigned long)io.metadata; |
d29ec824 | 1807 | write = io.opcode & 1; |
a53295b6 | 1808 | |
71feb364 KB |
1809 | if (ns->ext) { |
1810 | length += meta_len; | |
1811 | meta_len = 0; | |
a67a9513 KB |
1812 | } |
1813 | if (meta_len) { | |
d29ec824 CH |
1814 | if (((io.metadata & 3) || !io.metadata) && !ns->ext) |
1815 | return -EINVAL; | |
1816 | ||
e75ec752 | 1817 | meta = dma_alloc_coherent(dev->dev, meta_len, |
a67a9513 | 1818 | &meta_dma, GFP_KERNEL); |
fec558b5 | 1819 | |
a67a9513 KB |
1820 | if (!meta) { |
1821 | status = -ENOMEM; | |
1822 | goto unmap; | |
1823 | } | |
1824 | if (write) { | |
fec558b5 | 1825 | if (copy_from_user(meta, metadata, meta_len)) { |
a67a9513 KB |
1826 | status = -EFAULT; |
1827 | goto unmap; | |
1828 | } | |
1829 | } | |
1830 | } | |
1831 | ||
a53295b6 MW |
1832 | memset(&c, 0, sizeof(c)); |
1833 | c.rw.opcode = io.opcode; | |
1834 | c.rw.flags = io.flags; | |
6c7d4945 | 1835 | c.rw.nsid = cpu_to_le32(ns->ns_id); |
a53295b6 | 1836 | c.rw.slba = cpu_to_le64(io.slba); |
6c7d4945 | 1837 | c.rw.length = cpu_to_le16(io.nblocks); |
a53295b6 | 1838 | c.rw.control = cpu_to_le16(io.control); |
1c9b5265 MW |
1839 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
1840 | c.rw.reftag = cpu_to_le32(io.reftag); | |
1841 | c.rw.apptag = cpu_to_le16(io.apptag); | |
1842 | c.rw.appmask = cpu_to_le16(io.appmask); | |
a67a9513 | 1843 | c.rw.metadata = cpu_to_le64(meta_dma); |
d29ec824 CH |
1844 | |
1845 | status = __nvme_submit_sync_cmd(ns->queue, &c, NULL, | |
1846 | (void __user *)io.addr, length, NULL, 0); | |
f410c680 | 1847 | unmap: |
a67a9513 KB |
1848 | if (meta) { |
1849 | if (status == NVME_SC_SUCCESS && !write) { | |
fec558b5 | 1850 | if (copy_to_user(metadata, meta, meta_len)) |
a67a9513 KB |
1851 | status = -EFAULT; |
1852 | } | |
e75ec752 | 1853 | dma_free_coherent(dev->dev, meta_len, meta, meta_dma); |
f410c680 | 1854 | } |
a53295b6 MW |
1855 | return status; |
1856 | } | |
1857 | ||
a4aea562 MB |
1858 | static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns, |
1859 | struct nvme_passthru_cmd __user *ucmd) | |
6ee44cdc | 1860 | { |
7963e521 | 1861 | struct nvme_passthru_cmd cmd; |
6ee44cdc | 1862 | struct nvme_command c; |
d29ec824 CH |
1863 | unsigned timeout = 0; |
1864 | int status; | |
6ee44cdc | 1865 | |
6bbf1acd MW |
1866 | if (!capable(CAP_SYS_ADMIN)) |
1867 | return -EACCES; | |
1868 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) | |
6ee44cdc | 1869 | return -EFAULT; |
6ee44cdc MW |
1870 | |
1871 | memset(&c, 0, sizeof(c)); | |
6bbf1acd MW |
1872 | c.common.opcode = cmd.opcode; |
1873 | c.common.flags = cmd.flags; | |
1874 | c.common.nsid = cpu_to_le32(cmd.nsid); | |
1875 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); | |
1876 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); | |
1877 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); | |
1878 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); | |
1879 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); | |
1880 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); | |
1881 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); | |
1882 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); | |
1883 | ||
d29ec824 CH |
1884 | if (cmd.timeout_ms) |
1885 | timeout = msecs_to_jiffies(cmd.timeout_ms); | |
eca18b23 | 1886 | |
f705f837 | 1887 | status = __nvme_submit_sync_cmd(ns ? ns->queue : dev->admin_q, &c, |
d29ec824 CH |
1888 | NULL, (void __user *)cmd.addr, cmd.data_len, |
1889 | &cmd.result, timeout); | |
1890 | if (status >= 0) { | |
1891 | if (put_user(cmd.result, &ucmd->result)) | |
1892 | return -EFAULT; | |
6bbf1acd | 1893 | } |
f4f117f6 | 1894 | |
6ee44cdc MW |
1895 | return status; |
1896 | } | |
1897 | ||
81f03fed JD |
1898 | static int nvme_subsys_reset(struct nvme_dev *dev) |
1899 | { | |
1900 | if (!dev->subsystem) | |
1901 | return -ENOTTY; | |
1902 | ||
1903 | writel(0x4E564D65, &dev->bar->nssr); /* "NVMe" */ | |
1904 | return 0; | |
1905 | } | |
1906 | ||
b60503ba MW |
1907 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1908 | unsigned long arg) | |
1909 | { | |
1910 | struct nvme_ns *ns = bdev->bd_disk->private_data; | |
1911 | ||
1912 | switch (cmd) { | |
6bbf1acd | 1913 | case NVME_IOCTL_ID: |
c3bfe717 | 1914 | force_successful_syscall_return(); |
6bbf1acd MW |
1915 | return ns->ns_id; |
1916 | case NVME_IOCTL_ADMIN_CMD: | |
a4aea562 | 1917 | return nvme_user_cmd(ns->dev, NULL, (void __user *)arg); |
7963e521 | 1918 | case NVME_IOCTL_IO_CMD: |
a4aea562 | 1919 | return nvme_user_cmd(ns->dev, ns, (void __user *)arg); |
a53295b6 MW |
1920 | case NVME_IOCTL_SUBMIT_IO: |
1921 | return nvme_submit_io(ns, (void __user *)arg); | |
5d0f6131 VV |
1922 | case SG_GET_VERSION_NUM: |
1923 | return nvme_sg_get_version_num((void __user *)arg); | |
1924 | case SG_IO: | |
1925 | return nvme_sg_io(ns, (void __user *)arg); | |
b60503ba MW |
1926 | default: |
1927 | return -ENOTTY; | |
1928 | } | |
1929 | } | |
1930 | ||
320a3827 KB |
1931 | #ifdef CONFIG_COMPAT |
1932 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
1933 | unsigned int cmd, unsigned long arg) | |
1934 | { | |
320a3827 KB |
1935 | switch (cmd) { |
1936 | case SG_IO: | |
e179729a | 1937 | return -ENOIOCTLCMD; |
320a3827 KB |
1938 | } |
1939 | return nvme_ioctl(bdev, mode, cmd, arg); | |
1940 | } | |
1941 | #else | |
1942 | #define nvme_compat_ioctl NULL | |
1943 | #endif | |
1944 | ||
5105aa55 | 1945 | static void nvme_free_dev(struct kref *kref); |
188c3568 KB |
1946 | static void nvme_free_ns(struct kref *kref) |
1947 | { | |
1948 | struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); | |
1949 | ||
1950 | spin_lock(&dev_list_lock); | |
1951 | ns->disk->private_data = NULL; | |
1952 | spin_unlock(&dev_list_lock); | |
1953 | ||
5105aa55 | 1954 | kref_put(&ns->dev->kref, nvme_free_dev); |
188c3568 KB |
1955 | put_disk(ns->disk); |
1956 | kfree(ns); | |
1957 | } | |
1958 | ||
9ac27090 KB |
1959 | static int nvme_open(struct block_device *bdev, fmode_t mode) |
1960 | { | |
9e60352c KB |
1961 | int ret = 0; |
1962 | struct nvme_ns *ns; | |
9ac27090 | 1963 | |
9e60352c KB |
1964 | spin_lock(&dev_list_lock); |
1965 | ns = bdev->bd_disk->private_data; | |
1966 | if (!ns) | |
1967 | ret = -ENXIO; | |
188c3568 | 1968 | else if (!kref_get_unless_zero(&ns->kref)) |
9e60352c KB |
1969 | ret = -ENXIO; |
1970 | spin_unlock(&dev_list_lock); | |
1971 | ||
1972 | return ret; | |
9ac27090 KB |
1973 | } |
1974 | ||
9ac27090 KB |
1975 | static void nvme_release(struct gendisk *disk, fmode_t mode) |
1976 | { | |
1977 | struct nvme_ns *ns = disk->private_data; | |
188c3568 | 1978 | kref_put(&ns->kref, nvme_free_ns); |
9ac27090 KB |
1979 | } |
1980 | ||
4cc09e2d KB |
1981 | static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) |
1982 | { | |
1983 | /* some standard values */ | |
1984 | geo->heads = 1 << 6; | |
1985 | geo->sectors = 1 << 5; | |
1986 | geo->cylinders = get_capacity(bd->bd_disk) >> 11; | |
1987 | return 0; | |
1988 | } | |
1989 | ||
e1e5e564 KB |
1990 | static void nvme_config_discard(struct nvme_ns *ns) |
1991 | { | |
1992 | u32 logical_block_size = queue_logical_block_size(ns->queue); | |
1993 | ns->queue->limits.discard_zeroes_data = 0; | |
1994 | ns->queue->limits.discard_alignment = logical_block_size; | |
1995 | ns->queue->limits.discard_granularity = logical_block_size; | |
2bb4cd5c | 1996 | blk_queue_max_discard_sectors(ns->queue, 0xffffffff); |
e1e5e564 KB |
1997 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); |
1998 | } | |
1999 | ||
1b9dbf7f KB |
2000 | static int nvme_revalidate_disk(struct gendisk *disk) |
2001 | { | |
2002 | struct nvme_ns *ns = disk->private_data; | |
2003 | struct nvme_dev *dev = ns->dev; | |
2004 | struct nvme_id_ns *id; | |
a67a9513 KB |
2005 | u8 lbaf, pi_type; |
2006 | u16 old_ms; | |
e1e5e564 | 2007 | unsigned short bs; |
1b9dbf7f | 2008 | |
d29ec824 | 2009 | if (nvme_identify_ns(dev, ns->ns_id, &id)) { |
a5768aa8 KB |
2010 | dev_warn(dev->dev, "%s: Identify failure nvme%dn%d\n", __func__, |
2011 | dev->instance, ns->ns_id); | |
2012 | return -ENODEV; | |
1b9dbf7f | 2013 | } |
a5768aa8 KB |
2014 | if (id->ncap == 0) { |
2015 | kfree(id); | |
2016 | return -ENODEV; | |
e1e5e564 | 2017 | } |
1b9dbf7f | 2018 | |
e1e5e564 KB |
2019 | old_ms = ns->ms; |
2020 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; | |
1b9dbf7f | 2021 | ns->lba_shift = id->lbaf[lbaf].ds; |
e1e5e564 | 2022 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); |
a67a9513 | 2023 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); |
e1e5e564 KB |
2024 | |
2025 | /* | |
2026 | * If identify namespace failed, use default 512 byte block size so | |
2027 | * block layer can use before failing read/write for 0 capacity. | |
2028 | */ | |
2029 | if (ns->lba_shift == 0) | |
2030 | ns->lba_shift = 9; | |
2031 | bs = 1 << ns->lba_shift; | |
2032 | ||
2033 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ | |
2034 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? | |
2035 | id->dps & NVME_NS_DPS_PI_MASK : 0; | |
2036 | ||
52b68d7e KB |
2037 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || |
2038 | ns->ms != old_ms || | |
e1e5e564 | 2039 | bs != queue_logical_block_size(disk->queue) || |
a67a9513 | 2040 | (ns->ms && ns->ext))) |
e1e5e564 KB |
2041 | blk_integrity_unregister(disk); |
2042 | ||
2043 | ns->pi_type = pi_type; | |
2044 | blk_queue_logical_block_size(ns->queue, bs); | |
2045 | ||
52b68d7e | 2046 | if (ns->ms && !blk_get_integrity(disk) && (disk->flags & GENHD_FL_UP) && |
a67a9513 | 2047 | !ns->ext) |
e1e5e564 KB |
2048 | nvme_init_integrity(ns); |
2049 | ||
e19b127f | 2050 | if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk)) |
e1e5e564 KB |
2051 | set_capacity(disk, 0); |
2052 | else | |
2053 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); | |
2054 | ||
2055 | if (dev->oncs & NVME_CTRL_ONCS_DSM) | |
2056 | nvme_config_discard(ns); | |
1b9dbf7f | 2057 | |
d29ec824 | 2058 | kfree(id); |
1b9dbf7f KB |
2059 | return 0; |
2060 | } | |
2061 | ||
b60503ba MW |
2062 | static const struct block_device_operations nvme_fops = { |
2063 | .owner = THIS_MODULE, | |
2064 | .ioctl = nvme_ioctl, | |
320a3827 | 2065 | .compat_ioctl = nvme_compat_ioctl, |
9ac27090 KB |
2066 | .open = nvme_open, |
2067 | .release = nvme_release, | |
4cc09e2d | 2068 | .getgeo = nvme_getgeo, |
1b9dbf7f | 2069 | .revalidate_disk= nvme_revalidate_disk, |
b60503ba MW |
2070 | }; |
2071 | ||
1fa6aead MW |
2072 | static int nvme_kthread(void *data) |
2073 | { | |
d4b4ff8e | 2074 | struct nvme_dev *dev, *next; |
1fa6aead MW |
2075 | |
2076 | while (!kthread_should_stop()) { | |
564a232c | 2077 | set_current_state(TASK_INTERRUPTIBLE); |
1fa6aead | 2078 | spin_lock(&dev_list_lock); |
d4b4ff8e | 2079 | list_for_each_entry_safe(dev, next, &dev_list, node) { |
1fa6aead | 2080 | int i; |
dfbac8c7 KB |
2081 | u32 csts = readl(&dev->bar->csts); |
2082 | ||
2083 | if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || | |
2084 | csts & NVME_CSTS_CFS) { | |
d4b4ff8e KB |
2085 | if (work_busy(&dev->reset_work)) |
2086 | continue; | |
2087 | list_del_init(&dev->node); | |
e75ec752 | 2088 | dev_warn(dev->dev, |
a4aea562 MB |
2089 | "Failed status: %x, reset controller\n", |
2090 | readl(&dev->bar->csts)); | |
d4b4ff8e KB |
2091 | queue_work(nvme_workq, &dev->reset_work); |
2092 | continue; | |
2093 | } | |
1fa6aead | 2094 | for (i = 0; i < dev->queue_count; i++) { |
a4aea562 | 2095 | struct nvme_queue *nvmeq = dev->queues[i]; |
740216fc MW |
2096 | if (!nvmeq) |
2097 | continue; | |
1fa6aead | 2098 | spin_lock_irq(&nvmeq->q_lock); |
bc57a0f7 | 2099 | nvme_process_cq(nvmeq); |
6fccf938 KB |
2100 | |
2101 | while ((i == 0) && (dev->event_limit > 0)) { | |
a4aea562 | 2102 | if (nvme_submit_async_admin_req(dev)) |
6fccf938 KB |
2103 | break; |
2104 | dev->event_limit--; | |
2105 | } | |
1fa6aead MW |
2106 | spin_unlock_irq(&nvmeq->q_lock); |
2107 | } | |
2108 | } | |
2109 | spin_unlock(&dev_list_lock); | |
acb7aa0d | 2110 | schedule_timeout(round_jiffies_relative(HZ)); |
1fa6aead MW |
2111 | } |
2112 | return 0; | |
2113 | } | |
2114 | ||
e1e5e564 | 2115 | static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid) |
b60503ba MW |
2116 | { |
2117 | struct nvme_ns *ns; | |
2118 | struct gendisk *disk; | |
e75ec752 | 2119 | int node = dev_to_node(dev->dev); |
b60503ba | 2120 | |
a4aea562 | 2121 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
b60503ba | 2122 | if (!ns) |
e1e5e564 KB |
2123 | return; |
2124 | ||
a4aea562 | 2125 | ns->queue = blk_mq_init_queue(&dev->tagset); |
9f173b33 | 2126 | if (IS_ERR(ns->queue)) |
b60503ba | 2127 | goto out_free_ns; |
4eeb9215 MW |
2128 | queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); |
2129 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); | |
b60503ba MW |
2130 | ns->dev = dev; |
2131 | ns->queue->queuedata = ns; | |
2132 | ||
a4aea562 | 2133 | disk = alloc_disk_node(0, node); |
b60503ba MW |
2134 | if (!disk) |
2135 | goto out_free_queue; | |
a4aea562 | 2136 | |
188c3568 | 2137 | kref_init(&ns->kref); |
5aff9382 | 2138 | ns->ns_id = nsid; |
b60503ba | 2139 | ns->disk = disk; |
e1e5e564 KB |
2140 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
2141 | list_add_tail(&ns->list, &dev->namespaces); | |
2142 | ||
e9ef4636 | 2143 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
e824410f | 2144 | if (dev->max_hw_sectors) { |
8fc23e03 | 2145 | blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); |
e824410f KB |
2146 | blk_queue_max_segments(ns->queue, |
2147 | ((dev->max_hw_sectors << 9) / dev->page_size) + 1); | |
2148 | } | |
a4aea562 MB |
2149 | if (dev->stripe_size) |
2150 | blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); | |
a7d2ce28 KB |
2151 | if (dev->vwc & NVME_CTRL_VWC_PRESENT) |
2152 | blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); | |
03100aad | 2153 | blk_queue_virt_boundary(ns->queue, dev->page_size - 1); |
b60503ba MW |
2154 | |
2155 | disk->major = nvme_major; | |
469071a3 | 2156 | disk->first_minor = 0; |
b60503ba MW |
2157 | disk->fops = &nvme_fops; |
2158 | disk->private_data = ns; | |
2159 | disk->queue = ns->queue; | |
b3fffdef | 2160 | disk->driverfs_dev = dev->device; |
469071a3 | 2161 | disk->flags = GENHD_FL_EXT_DEVT; |
5aff9382 | 2162 | sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); |
b60503ba | 2163 | |
e1e5e564 KB |
2164 | /* |
2165 | * Initialize capacity to 0 until we establish the namespace format and | |
2166 | * setup integrity extentions if necessary. The revalidate_disk after | |
2167 | * add_disk allows the driver to register with integrity if the format | |
2168 | * requires it. | |
2169 | */ | |
2170 | set_capacity(disk, 0); | |
a5768aa8 KB |
2171 | if (nvme_revalidate_disk(ns->disk)) |
2172 | goto out_free_disk; | |
2173 | ||
5105aa55 | 2174 | kref_get(&dev->kref); |
e1e5e564 | 2175 | add_disk(ns->disk); |
7bee6074 KB |
2176 | if (ns->ms) { |
2177 | struct block_device *bd = bdget_disk(ns->disk, 0); | |
2178 | if (!bd) | |
2179 | return; | |
2180 | if (blkdev_get(bd, FMODE_READ, NULL)) { | |
2181 | bdput(bd); | |
2182 | return; | |
2183 | } | |
2184 | blkdev_reread_part(bd); | |
2185 | blkdev_put(bd, FMODE_READ); | |
2186 | } | |
e1e5e564 | 2187 | return; |
a5768aa8 KB |
2188 | out_free_disk: |
2189 | kfree(disk); | |
2190 | list_del(&ns->list); | |
b60503ba MW |
2191 | out_free_queue: |
2192 | blk_cleanup_queue(ns->queue); | |
2193 | out_free_ns: | |
2194 | kfree(ns); | |
b60503ba MW |
2195 | } |
2196 | ||
42f61420 KB |
2197 | static void nvme_create_io_queues(struct nvme_dev *dev) |
2198 | { | |
a4aea562 | 2199 | unsigned i; |
42f61420 | 2200 | |
a4aea562 | 2201 | for (i = dev->queue_count; i <= dev->max_qid; i++) |
2b25d981 | 2202 | if (!nvme_alloc_queue(dev, i, dev->q_depth)) |
42f61420 KB |
2203 | break; |
2204 | ||
a4aea562 MB |
2205 | for (i = dev->online_queues; i <= dev->queue_count - 1; i++) |
2206 | if (nvme_create_queue(dev->queues[i], i)) | |
42f61420 KB |
2207 | break; |
2208 | } | |
2209 | ||
b3b06812 | 2210 | static int set_queue_count(struct nvme_dev *dev, int count) |
b60503ba MW |
2211 | { |
2212 | int status; | |
2213 | u32 result; | |
b3b06812 | 2214 | u32 q_count = (count - 1) | ((count - 1) << 16); |
b60503ba | 2215 | |
df348139 | 2216 | status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, |
bc5fc7e4 | 2217 | &result); |
27e8166c MW |
2218 | if (status < 0) |
2219 | return status; | |
2220 | if (status > 0) { | |
e75ec752 | 2221 | dev_err(dev->dev, "Could not set queue count (%d)\n", status); |
badc34d4 | 2222 | return 0; |
27e8166c | 2223 | } |
b60503ba MW |
2224 | return min(result & 0xffff, result >> 16) + 1; |
2225 | } | |
2226 | ||
8ffaadf7 JD |
2227 | static void __iomem *nvme_map_cmb(struct nvme_dev *dev) |
2228 | { | |
2229 | u64 szu, size, offset; | |
2230 | u32 cmbloc; | |
2231 | resource_size_t bar_size; | |
2232 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
2233 | void __iomem *cmb; | |
2234 | dma_addr_t dma_addr; | |
2235 | ||
2236 | if (!use_cmb_sqes) | |
2237 | return NULL; | |
2238 | ||
2239 | dev->cmbsz = readl(&dev->bar->cmbsz); | |
2240 | if (!(NVME_CMB_SZ(dev->cmbsz))) | |
2241 | return NULL; | |
2242 | ||
2243 | cmbloc = readl(&dev->bar->cmbloc); | |
2244 | ||
2245 | szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); | |
2246 | size = szu * NVME_CMB_SZ(dev->cmbsz); | |
2247 | offset = szu * NVME_CMB_OFST(cmbloc); | |
2248 | bar_size = pci_resource_len(pdev, NVME_CMB_BIR(cmbloc)); | |
2249 | ||
2250 | if (offset > bar_size) | |
2251 | return NULL; | |
2252 | ||
2253 | /* | |
2254 | * Controllers may support a CMB size larger than their BAR, | |
2255 | * for example, due to being behind a bridge. Reduce the CMB to | |
2256 | * the reported size of the BAR | |
2257 | */ | |
2258 | if (size > bar_size - offset) | |
2259 | size = bar_size - offset; | |
2260 | ||
2261 | dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(cmbloc)) + offset; | |
2262 | cmb = ioremap_wc(dma_addr, size); | |
2263 | if (!cmb) | |
2264 | return NULL; | |
2265 | ||
2266 | dev->cmb_dma_addr = dma_addr; | |
2267 | dev->cmb_size = size; | |
2268 | return cmb; | |
2269 | } | |
2270 | ||
2271 | static inline void nvme_release_cmb(struct nvme_dev *dev) | |
2272 | { | |
2273 | if (dev->cmb) { | |
2274 | iounmap(dev->cmb); | |
2275 | dev->cmb = NULL; | |
2276 | } | |
2277 | } | |
2278 | ||
9d713c2b KB |
2279 | static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
2280 | { | |
b80d5ccc | 2281 | return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); |
9d713c2b KB |
2282 | } |
2283 | ||
8d85fce7 | 2284 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
b60503ba | 2285 | { |
a4aea562 | 2286 | struct nvme_queue *adminq = dev->queues[0]; |
e75ec752 | 2287 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
42f61420 | 2288 | int result, i, vecs, nr_io_queues, size; |
b60503ba | 2289 | |
42f61420 | 2290 | nr_io_queues = num_possible_cpus(); |
b348b7d5 | 2291 | result = set_queue_count(dev, nr_io_queues); |
badc34d4 | 2292 | if (result <= 0) |
1b23484b | 2293 | return result; |
b348b7d5 MW |
2294 | if (result < nr_io_queues) |
2295 | nr_io_queues = result; | |
b60503ba | 2296 | |
8ffaadf7 JD |
2297 | if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { |
2298 | result = nvme_cmb_qdepth(dev, nr_io_queues, | |
2299 | sizeof(struct nvme_command)); | |
2300 | if (result > 0) | |
2301 | dev->q_depth = result; | |
2302 | else | |
2303 | nvme_release_cmb(dev); | |
2304 | } | |
2305 | ||
9d713c2b KB |
2306 | size = db_bar_size(dev, nr_io_queues); |
2307 | if (size > 8192) { | |
f1938f6e | 2308 | iounmap(dev->bar); |
9d713c2b KB |
2309 | do { |
2310 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); | |
2311 | if (dev->bar) | |
2312 | break; | |
2313 | if (!--nr_io_queues) | |
2314 | return -ENOMEM; | |
2315 | size = db_bar_size(dev, nr_io_queues); | |
2316 | } while (1); | |
f1938f6e | 2317 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
5a92e700 | 2318 | adminq->q_db = dev->dbs; |
f1938f6e MW |
2319 | } |
2320 | ||
9d713c2b | 2321 | /* Deregister the admin queue's interrupt */ |
3193f07b | 2322 | free_irq(dev->entry[0].vector, adminq); |
9d713c2b | 2323 | |
e32efbfc JA |
2324 | /* |
2325 | * If we enable msix early due to not intx, disable it again before | |
2326 | * setting up the full range we need. | |
2327 | */ | |
2328 | if (!pdev->irq) | |
2329 | pci_disable_msix(pdev); | |
2330 | ||
be577fab | 2331 | for (i = 0; i < nr_io_queues; i++) |
1b23484b | 2332 | dev->entry[i].entry = i; |
be577fab AG |
2333 | vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); |
2334 | if (vecs < 0) { | |
2335 | vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); | |
2336 | if (vecs < 0) { | |
2337 | vecs = 1; | |
2338 | } else { | |
2339 | for (i = 0; i < vecs; i++) | |
2340 | dev->entry[i].vector = i + pdev->irq; | |
fa08a396 RRG |
2341 | } |
2342 | } | |
2343 | ||
063a8096 MW |
2344 | /* |
2345 | * Should investigate if there's a performance win from allocating | |
2346 | * more queues than interrupt vectors; it might allow the submission | |
2347 | * path to scale better, even if the receive path is limited by the | |
2348 | * number of interrupts. | |
2349 | */ | |
2350 | nr_io_queues = vecs; | |
42f61420 | 2351 | dev->max_qid = nr_io_queues; |
063a8096 | 2352 | |
3193f07b | 2353 | result = queue_request_irq(dev, adminq, adminq->irqname); |
758dd7fd JD |
2354 | if (result) { |
2355 | adminq->cq_vector = -1; | |
22404274 | 2356 | goto free_queues; |
758dd7fd | 2357 | } |
1b23484b | 2358 | |
cd638946 | 2359 | /* Free previously allocated queues that are no longer usable */ |
42f61420 | 2360 | nvme_free_queues(dev, nr_io_queues + 1); |
a4aea562 | 2361 | nvme_create_io_queues(dev); |
9ecdc946 | 2362 | |
22404274 | 2363 | return 0; |
b60503ba | 2364 | |
22404274 | 2365 | free_queues: |
a1a5ef99 | 2366 | nvme_free_queues(dev, 1); |
22404274 | 2367 | return result; |
b60503ba MW |
2368 | } |
2369 | ||
a5768aa8 KB |
2370 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
2371 | { | |
2372 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); | |
2373 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); | |
2374 | ||
2375 | return nsa->ns_id - nsb->ns_id; | |
2376 | } | |
2377 | ||
2378 | static struct nvme_ns *nvme_find_ns(struct nvme_dev *dev, unsigned nsid) | |
2379 | { | |
2380 | struct nvme_ns *ns; | |
2381 | ||
2382 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2383 | if (ns->ns_id == nsid) | |
2384 | return ns; | |
2385 | if (ns->ns_id > nsid) | |
2386 | break; | |
2387 | } | |
2388 | return NULL; | |
2389 | } | |
2390 | ||
2391 | static inline bool nvme_io_incapable(struct nvme_dev *dev) | |
2392 | { | |
2393 | return (!dev->bar || readl(&dev->bar->csts) & NVME_CSTS_CFS || | |
2394 | dev->online_queues < 2); | |
2395 | } | |
2396 | ||
2397 | static void nvme_ns_remove(struct nvme_ns *ns) | |
2398 | { | |
2399 | bool kill = nvme_io_incapable(ns->dev) && !blk_queue_dying(ns->queue); | |
2400 | ||
2401 | if (kill) | |
2402 | blk_set_queue_dying(ns->queue); | |
2403 | if (ns->disk->flags & GENHD_FL_UP) { | |
2404 | if (blk_get_integrity(ns->disk)) | |
2405 | blk_integrity_unregister(ns->disk); | |
2406 | del_gendisk(ns->disk); | |
2407 | } | |
2408 | if (kill || !blk_queue_dying(ns->queue)) { | |
2409 | blk_mq_abort_requeue_list(ns->queue); | |
2410 | blk_cleanup_queue(ns->queue); | |
5105aa55 KB |
2411 | } |
2412 | list_del_init(&ns->list); | |
2413 | kref_put(&ns->kref, nvme_free_ns); | |
a5768aa8 KB |
2414 | } |
2415 | ||
2416 | static void nvme_scan_namespaces(struct nvme_dev *dev, unsigned nn) | |
2417 | { | |
2418 | struct nvme_ns *ns, *next; | |
2419 | unsigned i; | |
2420 | ||
2421 | for (i = 1; i <= nn; i++) { | |
2422 | ns = nvme_find_ns(dev, i); | |
2423 | if (ns) { | |
5105aa55 | 2424 | if (revalidate_disk(ns->disk)) |
a5768aa8 | 2425 | nvme_ns_remove(ns); |
a5768aa8 KB |
2426 | } else |
2427 | nvme_alloc_ns(dev, i); | |
2428 | } | |
2429 | list_for_each_entry_safe(ns, next, &dev->namespaces, list) { | |
5105aa55 | 2430 | if (ns->ns_id > nn) |
a5768aa8 | 2431 | nvme_ns_remove(ns); |
a5768aa8 KB |
2432 | } |
2433 | list_sort(NULL, &dev->namespaces, ns_cmp); | |
2434 | } | |
2435 | ||
bda4e0fb KB |
2436 | static void nvme_set_irq_hints(struct nvme_dev *dev) |
2437 | { | |
2438 | struct nvme_queue *nvmeq; | |
2439 | int i; | |
2440 | ||
2441 | for (i = 0; i < dev->online_queues; i++) { | |
2442 | nvmeq = dev->queues[i]; | |
2443 | ||
2444 | if (!nvmeq->tags || !(*nvmeq->tags)) | |
2445 | continue; | |
2446 | ||
2447 | irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, | |
2448 | blk_mq_tags_cpumask(*nvmeq->tags)); | |
2449 | } | |
2450 | } | |
2451 | ||
a5768aa8 KB |
2452 | static void nvme_dev_scan(struct work_struct *work) |
2453 | { | |
2454 | struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); | |
2455 | struct nvme_id_ctrl *ctrl; | |
2456 | ||
2457 | if (!dev->tagset.tags) | |
2458 | return; | |
2459 | if (nvme_identify_ctrl(dev, &ctrl)) | |
2460 | return; | |
2461 | nvme_scan_namespaces(dev, le32_to_cpup(&ctrl->nn)); | |
2462 | kfree(ctrl); | |
bda4e0fb | 2463 | nvme_set_irq_hints(dev); |
a5768aa8 KB |
2464 | } |
2465 | ||
422ef0c7 MW |
2466 | /* |
2467 | * Return: error value if an error occurred setting up the queues or calling | |
2468 | * Identify Device. 0 if these succeeded, even if adding some of the | |
2469 | * namespaces failed. At the moment, these failures are silent. TBD which | |
2470 | * failures should be reported. | |
2471 | */ | |
8d85fce7 | 2472 | static int nvme_dev_add(struct nvme_dev *dev) |
b60503ba | 2473 | { |
e75ec752 | 2474 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
c3bfe717 | 2475 | int res; |
51814232 | 2476 | struct nvme_id_ctrl *ctrl; |
159b67d7 | 2477 | int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; |
b60503ba | 2478 | |
d29ec824 | 2479 | res = nvme_identify_ctrl(dev, &ctrl); |
b60503ba | 2480 | if (res) { |
e75ec752 | 2481 | dev_err(dev->dev, "Identify Controller failed (%d)\n", res); |
e1e5e564 | 2482 | return -EIO; |
b60503ba MW |
2483 | } |
2484 | ||
0e5e4f0e | 2485 | dev->oncs = le16_to_cpup(&ctrl->oncs); |
c30341dc | 2486 | dev->abort_limit = ctrl->acl + 1; |
a7d2ce28 | 2487 | dev->vwc = ctrl->vwc; |
51814232 MW |
2488 | memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); |
2489 | memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); | |
2490 | memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); | |
159b67d7 | 2491 | if (ctrl->mdts) |
8fc23e03 | 2492 | dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); |
68608c26 | 2493 | if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && |
a4aea562 MB |
2494 | (pdev->device == 0x0953) && ctrl->vs[3]) { |
2495 | unsigned int max_hw_sectors; | |
2496 | ||
159b67d7 | 2497 | dev->stripe_size = 1 << (ctrl->vs[3] + shift); |
a4aea562 MB |
2498 | max_hw_sectors = dev->stripe_size >> (shift - 9); |
2499 | if (dev->max_hw_sectors) { | |
2500 | dev->max_hw_sectors = min(max_hw_sectors, | |
2501 | dev->max_hw_sectors); | |
2502 | } else | |
2503 | dev->max_hw_sectors = max_hw_sectors; | |
2504 | } | |
d29ec824 | 2505 | kfree(ctrl); |
a4aea562 | 2506 | |
ffe7704d KB |
2507 | if (!dev->tagset.tags) { |
2508 | dev->tagset.ops = &nvme_mq_ops; | |
2509 | dev->tagset.nr_hw_queues = dev->online_queues - 1; | |
2510 | dev->tagset.timeout = NVME_IO_TIMEOUT; | |
2511 | dev->tagset.numa_node = dev_to_node(dev->dev); | |
2512 | dev->tagset.queue_depth = | |
a4aea562 | 2513 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; |
ffe7704d KB |
2514 | dev->tagset.cmd_size = nvme_cmd_size(dev); |
2515 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; | |
2516 | dev->tagset.driver_data = dev; | |
b60503ba | 2517 | |
ffe7704d KB |
2518 | if (blk_mq_alloc_tag_set(&dev->tagset)) |
2519 | return 0; | |
2520 | } | |
a5768aa8 | 2521 | schedule_work(&dev->scan_work); |
e1e5e564 | 2522 | return 0; |
b60503ba MW |
2523 | } |
2524 | ||
0877cb0d KB |
2525 | static int nvme_dev_map(struct nvme_dev *dev) |
2526 | { | |
42f61420 | 2527 | u64 cap; |
0877cb0d | 2528 | int bars, result = -ENOMEM; |
e75ec752 | 2529 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
0877cb0d KB |
2530 | |
2531 | if (pci_enable_device_mem(pdev)) | |
2532 | return result; | |
2533 | ||
2534 | dev->entry[0].vector = pdev->irq; | |
2535 | pci_set_master(pdev); | |
2536 | bars = pci_select_bars(pdev, IORESOURCE_MEM); | |
be7837e8 JA |
2537 | if (!bars) |
2538 | goto disable_pci; | |
2539 | ||
0877cb0d KB |
2540 | if (pci_request_selected_regions(pdev, bars, "nvme")) |
2541 | goto disable_pci; | |
2542 | ||
e75ec752 CH |
2543 | if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && |
2544 | dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) | |
052d0efa | 2545 | goto disable; |
0877cb0d | 2546 | |
0877cb0d KB |
2547 | dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); |
2548 | if (!dev->bar) | |
2549 | goto disable; | |
e32efbfc | 2550 | |
0e53d180 KB |
2551 | if (readl(&dev->bar->csts) == -1) { |
2552 | result = -ENODEV; | |
2553 | goto unmap; | |
2554 | } | |
e32efbfc JA |
2555 | |
2556 | /* | |
2557 | * Some devices don't advertse INTx interrupts, pre-enable a single | |
2558 | * MSIX vec for setup. We'll adjust this later. | |
2559 | */ | |
2560 | if (!pdev->irq) { | |
2561 | result = pci_enable_msix(pdev, dev->entry, 1); | |
2562 | if (result < 0) | |
2563 | goto unmap; | |
2564 | } | |
2565 | ||
42f61420 KB |
2566 | cap = readq(&dev->bar->cap); |
2567 | dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); | |
2568 | dev->db_stride = 1 << NVME_CAP_STRIDE(cap); | |
0877cb0d | 2569 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
8ffaadf7 JD |
2570 | if (readl(&dev->bar->vs) >= NVME_VS(1, 2)) |
2571 | dev->cmb = nvme_map_cmb(dev); | |
0877cb0d KB |
2572 | |
2573 | return 0; | |
2574 | ||
0e53d180 KB |
2575 | unmap: |
2576 | iounmap(dev->bar); | |
2577 | dev->bar = NULL; | |
0877cb0d KB |
2578 | disable: |
2579 | pci_release_regions(pdev); | |
2580 | disable_pci: | |
2581 | pci_disable_device(pdev); | |
2582 | return result; | |
2583 | } | |
2584 | ||
2585 | static void nvme_dev_unmap(struct nvme_dev *dev) | |
2586 | { | |
e75ec752 CH |
2587 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
2588 | ||
2589 | if (pdev->msi_enabled) | |
2590 | pci_disable_msi(pdev); | |
2591 | else if (pdev->msix_enabled) | |
2592 | pci_disable_msix(pdev); | |
0877cb0d KB |
2593 | |
2594 | if (dev->bar) { | |
2595 | iounmap(dev->bar); | |
2596 | dev->bar = NULL; | |
e75ec752 | 2597 | pci_release_regions(pdev); |
0877cb0d KB |
2598 | } |
2599 | ||
e75ec752 CH |
2600 | if (pci_is_enabled(pdev)) |
2601 | pci_disable_device(pdev); | |
0877cb0d KB |
2602 | } |
2603 | ||
4d115420 KB |
2604 | struct nvme_delq_ctx { |
2605 | struct task_struct *waiter; | |
2606 | struct kthread_worker *worker; | |
2607 | atomic_t refcount; | |
2608 | }; | |
2609 | ||
2610 | static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) | |
2611 | { | |
2612 | dq->waiter = current; | |
2613 | mb(); | |
2614 | ||
2615 | for (;;) { | |
2616 | set_current_state(TASK_KILLABLE); | |
2617 | if (!atomic_read(&dq->refcount)) | |
2618 | break; | |
2619 | if (!schedule_timeout(ADMIN_TIMEOUT) || | |
2620 | fatal_signal_pending(current)) { | |
0fb59cbc KB |
2621 | /* |
2622 | * Disable the controller first since we can't trust it | |
2623 | * at this point, but leave the admin queue enabled | |
2624 | * until all queue deletion requests are flushed. | |
2625 | * FIXME: This may take a while if there are more h/w | |
2626 | * queues than admin tags. | |
2627 | */ | |
4d115420 | 2628 | set_current_state(TASK_RUNNING); |
4d115420 | 2629 | nvme_disable_ctrl(dev, readq(&dev->bar->cap)); |
0fb59cbc | 2630 | nvme_clear_queue(dev->queues[0]); |
4d115420 | 2631 | flush_kthread_worker(dq->worker); |
0fb59cbc | 2632 | nvme_disable_queue(dev, 0); |
4d115420 KB |
2633 | return; |
2634 | } | |
2635 | } | |
2636 | set_current_state(TASK_RUNNING); | |
2637 | } | |
2638 | ||
2639 | static void nvme_put_dq(struct nvme_delq_ctx *dq) | |
2640 | { | |
2641 | atomic_dec(&dq->refcount); | |
2642 | if (dq->waiter) | |
2643 | wake_up_process(dq->waiter); | |
2644 | } | |
2645 | ||
2646 | static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) | |
2647 | { | |
2648 | atomic_inc(&dq->refcount); | |
2649 | return dq; | |
2650 | } | |
2651 | ||
2652 | static void nvme_del_queue_end(struct nvme_queue *nvmeq) | |
2653 | { | |
2654 | struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; | |
4d115420 KB |
2655 | nvme_put_dq(dq); |
2656 | } | |
2657 | ||
2658 | static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, | |
2659 | kthread_work_func_t fn) | |
2660 | { | |
2661 | struct nvme_command c; | |
2662 | ||
2663 | memset(&c, 0, sizeof(c)); | |
2664 | c.delete_queue.opcode = opcode; | |
2665 | c.delete_queue.qid = cpu_to_le16(nvmeq->qid); | |
2666 | ||
2667 | init_kthread_work(&nvmeq->cmdinfo.work, fn); | |
a4aea562 MB |
2668 | return nvme_submit_admin_async_cmd(nvmeq->dev, &c, &nvmeq->cmdinfo, |
2669 | ADMIN_TIMEOUT); | |
4d115420 KB |
2670 | } |
2671 | ||
2672 | static void nvme_del_cq_work_handler(struct kthread_work *work) | |
2673 | { | |
2674 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2675 | cmdinfo.work); | |
2676 | nvme_del_queue_end(nvmeq); | |
2677 | } | |
2678 | ||
2679 | static int nvme_delete_cq(struct nvme_queue *nvmeq) | |
2680 | { | |
2681 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, | |
2682 | nvme_del_cq_work_handler); | |
2683 | } | |
2684 | ||
2685 | static void nvme_del_sq_work_handler(struct kthread_work *work) | |
2686 | { | |
2687 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2688 | cmdinfo.work); | |
2689 | int status = nvmeq->cmdinfo.status; | |
2690 | ||
2691 | if (!status) | |
2692 | status = nvme_delete_cq(nvmeq); | |
2693 | if (status) | |
2694 | nvme_del_queue_end(nvmeq); | |
2695 | } | |
2696 | ||
2697 | static int nvme_delete_sq(struct nvme_queue *nvmeq) | |
2698 | { | |
2699 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, | |
2700 | nvme_del_sq_work_handler); | |
2701 | } | |
2702 | ||
2703 | static void nvme_del_queue_start(struct kthread_work *work) | |
2704 | { | |
2705 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, | |
2706 | cmdinfo.work); | |
4d115420 KB |
2707 | if (nvme_delete_sq(nvmeq)) |
2708 | nvme_del_queue_end(nvmeq); | |
2709 | } | |
2710 | ||
2711 | static void nvme_disable_io_queues(struct nvme_dev *dev) | |
2712 | { | |
2713 | int i; | |
2714 | DEFINE_KTHREAD_WORKER_ONSTACK(worker); | |
2715 | struct nvme_delq_ctx dq; | |
2716 | struct task_struct *kworker_task = kthread_run(kthread_worker_fn, | |
2717 | &worker, "nvme%d", dev->instance); | |
2718 | ||
2719 | if (IS_ERR(kworker_task)) { | |
e75ec752 | 2720 | dev_err(dev->dev, |
4d115420 KB |
2721 | "Failed to create queue del task\n"); |
2722 | for (i = dev->queue_count - 1; i > 0; i--) | |
2723 | nvme_disable_queue(dev, i); | |
2724 | return; | |
2725 | } | |
2726 | ||
2727 | dq.waiter = NULL; | |
2728 | atomic_set(&dq.refcount, 0); | |
2729 | dq.worker = &worker; | |
2730 | for (i = dev->queue_count - 1; i > 0; i--) { | |
a4aea562 | 2731 | struct nvme_queue *nvmeq = dev->queues[i]; |
4d115420 KB |
2732 | |
2733 | if (nvme_suspend_queue(nvmeq)) | |
2734 | continue; | |
2735 | nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); | |
2736 | nvmeq->cmdinfo.worker = dq.worker; | |
2737 | init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); | |
2738 | queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); | |
2739 | } | |
2740 | nvme_wait_dq(&dq, dev); | |
2741 | kthread_stop(kworker_task); | |
2742 | } | |
2743 | ||
b9afca3e DM |
2744 | /* |
2745 | * Remove the node from the device list and check | |
2746 | * for whether or not we need to stop the nvme_thread. | |
2747 | */ | |
2748 | static void nvme_dev_list_remove(struct nvme_dev *dev) | |
2749 | { | |
2750 | struct task_struct *tmp = NULL; | |
2751 | ||
2752 | spin_lock(&dev_list_lock); | |
2753 | list_del_init(&dev->node); | |
2754 | if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { | |
2755 | tmp = nvme_thread; | |
2756 | nvme_thread = NULL; | |
2757 | } | |
2758 | spin_unlock(&dev_list_lock); | |
2759 | ||
2760 | if (tmp) | |
2761 | kthread_stop(tmp); | |
2762 | } | |
2763 | ||
c9d3bf88 KB |
2764 | static void nvme_freeze_queues(struct nvme_dev *dev) |
2765 | { | |
2766 | struct nvme_ns *ns; | |
2767 | ||
2768 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2769 | blk_mq_freeze_queue_start(ns->queue); | |
2770 | ||
cddcd72b | 2771 | spin_lock_irq(ns->queue->queue_lock); |
c9d3bf88 | 2772 | queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); |
cddcd72b | 2773 | spin_unlock_irq(ns->queue->queue_lock); |
c9d3bf88 KB |
2774 | |
2775 | blk_mq_cancel_requeue_work(ns->queue); | |
2776 | blk_mq_stop_hw_queues(ns->queue); | |
2777 | } | |
2778 | } | |
2779 | ||
2780 | static void nvme_unfreeze_queues(struct nvme_dev *dev) | |
2781 | { | |
2782 | struct nvme_ns *ns; | |
2783 | ||
2784 | list_for_each_entry(ns, &dev->namespaces, list) { | |
2785 | queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); | |
2786 | blk_mq_unfreeze_queue(ns->queue); | |
2787 | blk_mq_start_stopped_hw_queues(ns->queue, true); | |
2788 | blk_mq_kick_requeue_list(ns->queue); | |
2789 | } | |
2790 | } | |
2791 | ||
f0b50732 | 2792 | static void nvme_dev_shutdown(struct nvme_dev *dev) |
b60503ba | 2793 | { |
22404274 | 2794 | int i; |
7c1b2450 | 2795 | u32 csts = -1; |
22404274 | 2796 | |
b9afca3e | 2797 | nvme_dev_list_remove(dev); |
1fa6aead | 2798 | |
c9d3bf88 KB |
2799 | if (dev->bar) { |
2800 | nvme_freeze_queues(dev); | |
7c1b2450 | 2801 | csts = readl(&dev->bar->csts); |
c9d3bf88 | 2802 | } |
7c1b2450 | 2803 | if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { |
4d115420 | 2804 | for (i = dev->queue_count - 1; i >= 0; i--) { |
a4aea562 | 2805 | struct nvme_queue *nvmeq = dev->queues[i]; |
4d115420 | 2806 | nvme_suspend_queue(nvmeq); |
4d115420 KB |
2807 | } |
2808 | } else { | |
2809 | nvme_disable_io_queues(dev); | |
1894d8f1 | 2810 | nvme_shutdown_ctrl(dev); |
4d115420 KB |
2811 | nvme_disable_queue(dev, 0); |
2812 | } | |
f0b50732 | 2813 | nvme_dev_unmap(dev); |
07836e65 KB |
2814 | |
2815 | for (i = dev->queue_count - 1; i >= 0; i--) | |
2816 | nvme_clear_queue(dev->queues[i]); | |
f0b50732 KB |
2817 | } |
2818 | ||
2819 | static void nvme_dev_remove(struct nvme_dev *dev) | |
2820 | { | |
5105aa55 | 2821 | struct nvme_ns *ns, *next; |
f0b50732 | 2822 | |
5105aa55 | 2823 | list_for_each_entry_safe(ns, next, &dev->namespaces, list) |
a5768aa8 | 2824 | nvme_ns_remove(ns); |
b60503ba MW |
2825 | } |
2826 | ||
091b6092 MW |
2827 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
2828 | { | |
e75ec752 | 2829 | dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, |
091b6092 MW |
2830 | PAGE_SIZE, PAGE_SIZE, 0); |
2831 | if (!dev->prp_page_pool) | |
2832 | return -ENOMEM; | |
2833 | ||
99802a7a | 2834 | /* Optimisation for I/Os between 4k and 128k */ |
e75ec752 | 2835 | dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, |
99802a7a MW |
2836 | 256, 256, 0); |
2837 | if (!dev->prp_small_pool) { | |
2838 | dma_pool_destroy(dev->prp_page_pool); | |
2839 | return -ENOMEM; | |
2840 | } | |
091b6092 MW |
2841 | return 0; |
2842 | } | |
2843 | ||
2844 | static void nvme_release_prp_pools(struct nvme_dev *dev) | |
2845 | { | |
2846 | dma_pool_destroy(dev->prp_page_pool); | |
99802a7a | 2847 | dma_pool_destroy(dev->prp_small_pool); |
091b6092 MW |
2848 | } |
2849 | ||
cd58ad7d QSA |
2850 | static DEFINE_IDA(nvme_instance_ida); |
2851 | ||
2852 | static int nvme_set_instance(struct nvme_dev *dev) | |
b60503ba | 2853 | { |
cd58ad7d QSA |
2854 | int instance, error; |
2855 | ||
2856 | do { | |
2857 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) | |
2858 | return -ENODEV; | |
2859 | ||
2860 | spin_lock(&dev_list_lock); | |
2861 | error = ida_get_new(&nvme_instance_ida, &instance); | |
2862 | spin_unlock(&dev_list_lock); | |
2863 | } while (error == -EAGAIN); | |
2864 | ||
2865 | if (error) | |
2866 | return -ENODEV; | |
2867 | ||
2868 | dev->instance = instance; | |
2869 | return 0; | |
b60503ba MW |
2870 | } |
2871 | ||
2872 | static void nvme_release_instance(struct nvme_dev *dev) | |
2873 | { | |
cd58ad7d QSA |
2874 | spin_lock(&dev_list_lock); |
2875 | ida_remove(&nvme_instance_ida, dev->instance); | |
2876 | spin_unlock(&dev_list_lock); | |
b60503ba MW |
2877 | } |
2878 | ||
5e82e952 KB |
2879 | static void nvme_free_dev(struct kref *kref) |
2880 | { | |
2881 | struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); | |
9ac27090 | 2882 | |
e75ec752 | 2883 | put_device(dev->dev); |
b3fffdef | 2884 | put_device(dev->device); |
285dffc9 | 2885 | nvme_release_instance(dev); |
4af0e21c KB |
2886 | if (dev->tagset.tags) |
2887 | blk_mq_free_tag_set(&dev->tagset); | |
2888 | if (dev->admin_q) | |
2889 | blk_put_queue(dev->admin_q); | |
5e82e952 KB |
2890 | kfree(dev->queues); |
2891 | kfree(dev->entry); | |
2892 | kfree(dev); | |
2893 | } | |
2894 | ||
2895 | static int nvme_dev_open(struct inode *inode, struct file *f) | |
2896 | { | |
b3fffdef KB |
2897 | struct nvme_dev *dev; |
2898 | int instance = iminor(inode); | |
2899 | int ret = -ENODEV; | |
2900 | ||
2901 | spin_lock(&dev_list_lock); | |
2902 | list_for_each_entry(dev, &dev_list, node) { | |
2903 | if (dev->instance == instance) { | |
2e1d8448 KB |
2904 | if (!dev->admin_q) { |
2905 | ret = -EWOULDBLOCK; | |
2906 | break; | |
2907 | } | |
b3fffdef KB |
2908 | if (!kref_get_unless_zero(&dev->kref)) |
2909 | break; | |
2910 | f->private_data = dev; | |
2911 | ret = 0; | |
2912 | break; | |
2913 | } | |
2914 | } | |
2915 | spin_unlock(&dev_list_lock); | |
2916 | ||
2917 | return ret; | |
5e82e952 KB |
2918 | } |
2919 | ||
2920 | static int nvme_dev_release(struct inode *inode, struct file *f) | |
2921 | { | |
2922 | struct nvme_dev *dev = f->private_data; | |
2923 | kref_put(&dev->kref, nvme_free_dev); | |
2924 | return 0; | |
2925 | } | |
2926 | ||
2927 | static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) | |
2928 | { | |
2929 | struct nvme_dev *dev = f->private_data; | |
a4aea562 MB |
2930 | struct nvme_ns *ns; |
2931 | ||
5e82e952 KB |
2932 | switch (cmd) { |
2933 | case NVME_IOCTL_ADMIN_CMD: | |
a4aea562 | 2934 | return nvme_user_cmd(dev, NULL, (void __user *)arg); |
7963e521 | 2935 | case NVME_IOCTL_IO_CMD: |
a4aea562 MB |
2936 | if (list_empty(&dev->namespaces)) |
2937 | return -ENOTTY; | |
2938 | ns = list_first_entry(&dev->namespaces, struct nvme_ns, list); | |
2939 | return nvme_user_cmd(dev, ns, (void __user *)arg); | |
4cc06521 KB |
2940 | case NVME_IOCTL_RESET: |
2941 | dev_warn(dev->dev, "resetting controller\n"); | |
2942 | return nvme_reset(dev); | |
81f03fed JD |
2943 | case NVME_IOCTL_SUBSYS_RESET: |
2944 | return nvme_subsys_reset(dev); | |
5e82e952 KB |
2945 | default: |
2946 | return -ENOTTY; | |
2947 | } | |
2948 | } | |
2949 | ||
2950 | static const struct file_operations nvme_dev_fops = { | |
2951 | .owner = THIS_MODULE, | |
2952 | .open = nvme_dev_open, | |
2953 | .release = nvme_dev_release, | |
2954 | .unlocked_ioctl = nvme_dev_ioctl, | |
2955 | .compat_ioctl = nvme_dev_ioctl, | |
2956 | }; | |
2957 | ||
f0b50732 KB |
2958 | static int nvme_dev_start(struct nvme_dev *dev) |
2959 | { | |
2960 | int result; | |
b9afca3e | 2961 | bool start_thread = false; |
f0b50732 KB |
2962 | |
2963 | result = nvme_dev_map(dev); | |
2964 | if (result) | |
2965 | return result; | |
2966 | ||
2967 | result = nvme_configure_admin_queue(dev); | |
2968 | if (result) | |
2969 | goto unmap; | |
2970 | ||
2971 | spin_lock(&dev_list_lock); | |
b9afca3e DM |
2972 | if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { |
2973 | start_thread = true; | |
2974 | nvme_thread = NULL; | |
2975 | } | |
f0b50732 KB |
2976 | list_add(&dev->node, &dev_list); |
2977 | spin_unlock(&dev_list_lock); | |
2978 | ||
b9afca3e DM |
2979 | if (start_thread) { |
2980 | nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); | |
387caa5a | 2981 | wake_up_all(&nvme_kthread_wait); |
b9afca3e DM |
2982 | } else |
2983 | wait_event_killable(nvme_kthread_wait, nvme_thread); | |
2984 | ||
2985 | if (IS_ERR_OR_NULL(nvme_thread)) { | |
2986 | result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; | |
2987 | goto disable; | |
2988 | } | |
a4aea562 MB |
2989 | |
2990 | nvme_init_queue(dev->queues[0], 0); | |
0fb59cbc KB |
2991 | result = nvme_alloc_admin_tags(dev); |
2992 | if (result) | |
2993 | goto disable; | |
b9afca3e | 2994 | |
f0b50732 | 2995 | result = nvme_setup_io_queues(dev); |
badc34d4 | 2996 | if (result) |
0fb59cbc | 2997 | goto free_tags; |
f0b50732 | 2998 | |
1efccc9d | 2999 | dev->event_limit = 1; |
d82e8bfd | 3000 | return result; |
f0b50732 | 3001 | |
0fb59cbc KB |
3002 | free_tags: |
3003 | nvme_dev_remove_admin(dev); | |
4af0e21c KB |
3004 | blk_put_queue(dev->admin_q); |
3005 | dev->admin_q = NULL; | |
3006 | dev->queues[0]->tags = NULL; | |
f0b50732 | 3007 | disable: |
a1a5ef99 | 3008 | nvme_disable_queue(dev, 0); |
b9afca3e | 3009 | nvme_dev_list_remove(dev); |
f0b50732 KB |
3010 | unmap: |
3011 | nvme_dev_unmap(dev); | |
3012 | return result; | |
3013 | } | |
3014 | ||
9a6b9458 KB |
3015 | static int nvme_remove_dead_ctrl(void *arg) |
3016 | { | |
3017 | struct nvme_dev *dev = (struct nvme_dev *)arg; | |
e75ec752 | 3018 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
9a6b9458 KB |
3019 | |
3020 | if (pci_get_drvdata(pdev)) | |
c81f4975 | 3021 | pci_stop_and_remove_bus_device_locked(pdev); |
9a6b9458 KB |
3022 | kref_put(&dev->kref, nvme_free_dev); |
3023 | return 0; | |
3024 | } | |
3025 | ||
9a6b9458 KB |
3026 | static int nvme_dev_resume(struct nvme_dev *dev) |
3027 | { | |
3028 | int ret; | |
3029 | ||
3030 | ret = nvme_dev_start(dev); | |
badc34d4 | 3031 | if (ret) |
9a6b9458 | 3032 | return ret; |
badc34d4 | 3033 | if (dev->online_queues < 2) { |
0a7385ad KB |
3034 | dev_warn(dev->dev, "IO queues not created\n"); |
3035 | nvme_free_queues(dev, 1); | |
3036 | nvme_dev_remove(dev); | |
c9d3bf88 KB |
3037 | } else { |
3038 | nvme_unfreeze_queues(dev); | |
ffe7704d | 3039 | nvme_dev_add(dev); |
9a6b9458 KB |
3040 | } |
3041 | return 0; | |
3042 | } | |
3043 | ||
de3eff2b KB |
3044 | static void nvme_dead_ctrl(struct nvme_dev *dev) |
3045 | { | |
3046 | dev_warn(dev->dev, "Device failed to resume\n"); | |
3047 | kref_get(&dev->kref); | |
3048 | if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", | |
3049 | dev->instance))) { | |
3050 | dev_err(dev->dev, | |
3051 | "Failed to start controller remove task\n"); | |
3052 | kref_put(&dev->kref, nvme_free_dev); | |
3053 | } | |
3054 | } | |
3055 | ||
9a6b9458 KB |
3056 | static void nvme_dev_reset(struct nvme_dev *dev) |
3057 | { | |
ffe7704d KB |
3058 | bool in_probe = work_busy(&dev->probe_work); |
3059 | ||
9a6b9458 | 3060 | nvme_dev_shutdown(dev); |
ffe7704d KB |
3061 | |
3062 | /* Synchronize with device probe so that work will see failure status | |
3063 | * and exit gracefully without trying to schedule another reset */ | |
3064 | flush_work(&dev->probe_work); | |
3065 | ||
3066 | /* Fail this device if reset occured during probe to avoid | |
3067 | * infinite initialization loops. */ | |
3068 | if (in_probe) { | |
de3eff2b | 3069 | nvme_dead_ctrl(dev); |
ffe7704d | 3070 | return; |
9a6b9458 | 3071 | } |
ffe7704d KB |
3072 | /* Schedule device resume asynchronously so the reset work is available |
3073 | * to cleanup errors that may occur during reinitialization */ | |
3074 | schedule_work(&dev->probe_work); | |
9a6b9458 KB |
3075 | } |
3076 | ||
3077 | static void nvme_reset_failed_dev(struct work_struct *ws) | |
3078 | { | |
3079 | struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); | |
3080 | nvme_dev_reset(dev); | |
3081 | } | |
3082 | ||
4cc06521 KB |
3083 | static int nvme_reset(struct nvme_dev *dev) |
3084 | { | |
3085 | int ret = -EBUSY; | |
3086 | ||
3087 | if (!dev->admin_q || blk_queue_dying(dev->admin_q)) | |
3088 | return -ENODEV; | |
3089 | ||
3090 | spin_lock(&dev_list_lock); | |
3091 | if (!work_pending(&dev->reset_work)) { | |
4cc06521 KB |
3092 | queue_work(nvme_workq, &dev->reset_work); |
3093 | ret = 0; | |
3094 | } | |
3095 | spin_unlock(&dev_list_lock); | |
3096 | ||
3097 | if (!ret) { | |
3098 | flush_work(&dev->reset_work); | |
ffe7704d | 3099 | flush_work(&dev->probe_work); |
4cc06521 KB |
3100 | return 0; |
3101 | } | |
3102 | ||
3103 | return ret; | |
3104 | } | |
3105 | ||
3106 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
3107 | struct device_attribute *attr, const char *buf, | |
3108 | size_t count) | |
3109 | { | |
3110 | struct nvme_dev *ndev = dev_get_drvdata(dev); | |
3111 | int ret; | |
3112 | ||
3113 | ret = nvme_reset(ndev); | |
3114 | if (ret < 0) | |
3115 | return ret; | |
3116 | ||
3117 | return count; | |
3118 | } | |
3119 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); | |
3120 | ||
2e1d8448 | 3121 | static void nvme_async_probe(struct work_struct *work); |
8d85fce7 | 3122 | static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
b60503ba | 3123 | { |
a4aea562 | 3124 | int node, result = -ENOMEM; |
b60503ba MW |
3125 | struct nvme_dev *dev; |
3126 | ||
a4aea562 MB |
3127 | node = dev_to_node(&pdev->dev); |
3128 | if (node == NUMA_NO_NODE) | |
3129 | set_dev_node(&pdev->dev, 0); | |
3130 | ||
3131 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); | |
b60503ba MW |
3132 | if (!dev) |
3133 | return -ENOMEM; | |
a4aea562 MB |
3134 | dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), |
3135 | GFP_KERNEL, node); | |
b60503ba MW |
3136 | if (!dev->entry) |
3137 | goto free; | |
a4aea562 MB |
3138 | dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), |
3139 | GFP_KERNEL, node); | |
b60503ba MW |
3140 | if (!dev->queues) |
3141 | goto free; | |
3142 | ||
3143 | INIT_LIST_HEAD(&dev->namespaces); | |
0a7385ad | 3144 | INIT_WORK(&dev->reset_work, nvme_reset_failed_dev); |
e75ec752 | 3145 | dev->dev = get_device(&pdev->dev); |
9a6b9458 | 3146 | pci_set_drvdata(pdev, dev); |
cd58ad7d QSA |
3147 | result = nvme_set_instance(dev); |
3148 | if (result) | |
a96d4f5c | 3149 | goto put_pci; |
b60503ba | 3150 | |
091b6092 MW |
3151 | result = nvme_setup_prp_pools(dev); |
3152 | if (result) | |
0877cb0d | 3153 | goto release; |
091b6092 | 3154 | |
fb35e914 | 3155 | kref_init(&dev->kref); |
b3fffdef KB |
3156 | dev->device = device_create(nvme_class, &pdev->dev, |
3157 | MKDEV(nvme_char_major, dev->instance), | |
3158 | dev, "nvme%d", dev->instance); | |
3159 | if (IS_ERR(dev->device)) { | |
3160 | result = PTR_ERR(dev->device); | |
2e1d8448 | 3161 | goto release_pools; |
b3fffdef KB |
3162 | } |
3163 | get_device(dev->device); | |
4cc06521 KB |
3164 | dev_set_drvdata(dev->device, dev); |
3165 | ||
3166 | result = device_create_file(dev->device, &dev_attr_reset_controller); | |
3167 | if (result) | |
3168 | goto put_dev; | |
740216fc | 3169 | |
e6e96d73 | 3170 | INIT_LIST_HEAD(&dev->node); |
a5768aa8 | 3171 | INIT_WORK(&dev->scan_work, nvme_dev_scan); |
2e1d8448 KB |
3172 | INIT_WORK(&dev->probe_work, nvme_async_probe); |
3173 | schedule_work(&dev->probe_work); | |
b60503ba MW |
3174 | return 0; |
3175 | ||
4cc06521 KB |
3176 | put_dev: |
3177 | device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); | |
3178 | put_device(dev->device); | |
0877cb0d | 3179 | release_pools: |
091b6092 | 3180 | nvme_release_prp_pools(dev); |
0877cb0d KB |
3181 | release: |
3182 | nvme_release_instance(dev); | |
a96d4f5c | 3183 | put_pci: |
e75ec752 | 3184 | put_device(dev->dev); |
b60503ba MW |
3185 | free: |
3186 | kfree(dev->queues); | |
3187 | kfree(dev->entry); | |
3188 | kfree(dev); | |
3189 | return result; | |
3190 | } | |
3191 | ||
2e1d8448 KB |
3192 | static void nvme_async_probe(struct work_struct *work) |
3193 | { | |
3194 | struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work); | |
2e1d8448 | 3195 | |
de3eff2b KB |
3196 | if (nvme_dev_resume(dev) && !work_busy(&dev->reset_work)) |
3197 | nvme_dead_ctrl(dev); | |
2e1d8448 KB |
3198 | } |
3199 | ||
f0d54a54 KB |
3200 | static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) |
3201 | { | |
a6739479 | 3202 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
f0d54a54 | 3203 | |
a6739479 KB |
3204 | if (prepare) |
3205 | nvme_dev_shutdown(dev); | |
3206 | else | |
0a7385ad | 3207 | schedule_work(&dev->probe_work); |
f0d54a54 KB |
3208 | } |
3209 | ||
09ece142 KB |
3210 | static void nvme_shutdown(struct pci_dev *pdev) |
3211 | { | |
3212 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
3213 | nvme_dev_shutdown(dev); | |
3214 | } | |
3215 | ||
8d85fce7 | 3216 | static void nvme_remove(struct pci_dev *pdev) |
b60503ba MW |
3217 | { |
3218 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
9a6b9458 KB |
3219 | |
3220 | spin_lock(&dev_list_lock); | |
3221 | list_del_init(&dev->node); | |
3222 | spin_unlock(&dev_list_lock); | |
3223 | ||
3224 | pci_set_drvdata(pdev, NULL); | |
2e1d8448 | 3225 | flush_work(&dev->probe_work); |
9a6b9458 | 3226 | flush_work(&dev->reset_work); |
a5768aa8 | 3227 | flush_work(&dev->scan_work); |
4cc06521 | 3228 | device_remove_file(dev->device, &dev_attr_reset_controller); |
c9d3bf88 | 3229 | nvme_dev_remove(dev); |
3399a3f7 | 3230 | nvme_dev_shutdown(dev); |
a4aea562 | 3231 | nvme_dev_remove_admin(dev); |
b3fffdef | 3232 | device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); |
a1a5ef99 | 3233 | nvme_free_queues(dev, 0); |
8ffaadf7 | 3234 | nvme_release_cmb(dev); |
9a6b9458 | 3235 | nvme_release_prp_pools(dev); |
5e82e952 | 3236 | kref_put(&dev->kref, nvme_free_dev); |
b60503ba MW |
3237 | } |
3238 | ||
3239 | /* These functions are yet to be implemented */ | |
3240 | #define nvme_error_detected NULL | |
3241 | #define nvme_dump_registers NULL | |
3242 | #define nvme_link_reset NULL | |
3243 | #define nvme_slot_reset NULL | |
3244 | #define nvme_error_resume NULL | |
cd638946 | 3245 | |
671a6018 | 3246 | #ifdef CONFIG_PM_SLEEP |
cd638946 KB |
3247 | static int nvme_suspend(struct device *dev) |
3248 | { | |
3249 | struct pci_dev *pdev = to_pci_dev(dev); | |
3250 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
3251 | ||
3252 | nvme_dev_shutdown(ndev); | |
3253 | return 0; | |
3254 | } | |
3255 | ||
3256 | static int nvme_resume(struct device *dev) | |
3257 | { | |
3258 | struct pci_dev *pdev = to_pci_dev(dev); | |
3259 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
cd638946 | 3260 | |
0a7385ad | 3261 | schedule_work(&ndev->probe_work); |
9a6b9458 | 3262 | return 0; |
cd638946 | 3263 | } |
671a6018 | 3264 | #endif |
cd638946 KB |
3265 | |
3266 | static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); | |
b60503ba | 3267 | |
1d352035 | 3268 | static const struct pci_error_handlers nvme_err_handler = { |
b60503ba MW |
3269 | .error_detected = nvme_error_detected, |
3270 | .mmio_enabled = nvme_dump_registers, | |
3271 | .link_reset = nvme_link_reset, | |
3272 | .slot_reset = nvme_slot_reset, | |
3273 | .resume = nvme_error_resume, | |
f0d54a54 | 3274 | .reset_notify = nvme_reset_notify, |
b60503ba MW |
3275 | }; |
3276 | ||
3277 | /* Move to pci_ids.h later */ | |
3278 | #define PCI_CLASS_STORAGE_EXPRESS 0x010802 | |
3279 | ||
6eb0d698 | 3280 | static const struct pci_device_id nvme_id_table[] = { |
b60503ba MW |
3281 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
3282 | { 0, } | |
3283 | }; | |
3284 | MODULE_DEVICE_TABLE(pci, nvme_id_table); | |
3285 | ||
3286 | static struct pci_driver nvme_driver = { | |
3287 | .name = "nvme", | |
3288 | .id_table = nvme_id_table, | |
3289 | .probe = nvme_probe, | |
8d85fce7 | 3290 | .remove = nvme_remove, |
09ece142 | 3291 | .shutdown = nvme_shutdown, |
cd638946 KB |
3292 | .driver = { |
3293 | .pm = &nvme_dev_pm_ops, | |
3294 | }, | |
b60503ba MW |
3295 | .err_handler = &nvme_err_handler, |
3296 | }; | |
3297 | ||
3298 | static int __init nvme_init(void) | |
3299 | { | |
0ac13140 | 3300 | int result; |
1fa6aead | 3301 | |
b9afca3e | 3302 | init_waitqueue_head(&nvme_kthread_wait); |
b60503ba | 3303 | |
9a6b9458 KB |
3304 | nvme_workq = create_singlethread_workqueue("nvme"); |
3305 | if (!nvme_workq) | |
b9afca3e | 3306 | return -ENOMEM; |
9a6b9458 | 3307 | |
5c42ea16 KB |
3308 | result = register_blkdev(nvme_major, "nvme"); |
3309 | if (result < 0) | |
9a6b9458 | 3310 | goto kill_workq; |
5c42ea16 | 3311 | else if (result > 0) |
0ac13140 | 3312 | nvme_major = result; |
b60503ba | 3313 | |
b3fffdef KB |
3314 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
3315 | &nvme_dev_fops); | |
3316 | if (result < 0) | |
3317 | goto unregister_blkdev; | |
3318 | else if (result > 0) | |
3319 | nvme_char_major = result; | |
3320 | ||
3321 | nvme_class = class_create(THIS_MODULE, "nvme"); | |
c727040b AK |
3322 | if (IS_ERR(nvme_class)) { |
3323 | result = PTR_ERR(nvme_class); | |
b3fffdef | 3324 | goto unregister_chrdev; |
c727040b | 3325 | } |
b3fffdef | 3326 | |
f3db22fe KB |
3327 | result = pci_register_driver(&nvme_driver); |
3328 | if (result) | |
b3fffdef | 3329 | goto destroy_class; |
1fa6aead | 3330 | return 0; |
b60503ba | 3331 | |
b3fffdef KB |
3332 | destroy_class: |
3333 | class_destroy(nvme_class); | |
3334 | unregister_chrdev: | |
3335 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
1fa6aead | 3336 | unregister_blkdev: |
b60503ba | 3337 | unregister_blkdev(nvme_major, "nvme"); |
9a6b9458 KB |
3338 | kill_workq: |
3339 | destroy_workqueue(nvme_workq); | |
b60503ba MW |
3340 | return result; |
3341 | } | |
3342 | ||
3343 | static void __exit nvme_exit(void) | |
3344 | { | |
3345 | pci_unregister_driver(&nvme_driver); | |
3346 | unregister_blkdev(nvme_major, "nvme"); | |
9a6b9458 | 3347 | destroy_workqueue(nvme_workq); |
b3fffdef KB |
3348 | class_destroy(nvme_class); |
3349 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); | |
b9afca3e | 3350 | BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); |
21bd78bc | 3351 | _nvme_check_size(); |
b60503ba MW |
3352 | } |
3353 | ||
3354 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); | |
3355 | MODULE_LICENSE("GPL"); | |
c78b4713 | 3356 | MODULE_VERSION("1.0"); |
b60503ba MW |
3357 | module_init(nvme_init); |
3358 | module_exit(nvme_exit); |