Commit | Line | Data |
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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 | ||
a0a3408e | 15 | #include <linux/aer.h> |
8de05535 | 16 | #include <linux/bitops.h> |
b60503ba | 17 | #include <linux/blkdev.h> |
a4aea562 | 18 | #include <linux/blk-mq.h> |
dca51e78 | 19 | #include <linux/blk-mq-pci.h> |
42f61420 | 20 | #include <linux/cpu.h> |
fd63e9ce | 21 | #include <linux/delay.h> |
ff5350a8 | 22 | #include <linux/dmi.h> |
b60503ba MW |
23 | #include <linux/errno.h> |
24 | #include <linux/fs.h> | |
25 | #include <linux/genhd.h> | |
4cc09e2d | 26 | #include <linux/hdreg.h> |
5aff9382 | 27 | #include <linux/idr.h> |
b60503ba MW |
28 | #include <linux/init.h> |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/io.h> | |
31 | #include <linux/kdev_t.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/moduleparam.h> | |
77bf25ea | 36 | #include <linux/mutex.h> |
b60503ba | 37 | #include <linux/pci.h> |
be7b6275 | 38 | #include <linux/poison.h> |
c3bfe717 | 39 | #include <linux/ptrace.h> |
b60503ba MW |
40 | #include <linux/sched.h> |
41 | #include <linux/slab.h> | |
e1e5e564 | 42 | #include <linux/t10-pi.h> |
2d55cd5f | 43 | #include <linux/timer.h> |
b60503ba | 44 | #include <linux/types.h> |
2f8e2c87 | 45 | #include <linux/io-64-nonatomic-lo-hi.h> |
1d277a63 | 46 | #include <asm/unaligned.h> |
a98e58e5 | 47 | #include <linux/sed-opal.h> |
797a796a | 48 | |
f11bb3e2 CH |
49 | #include "nvme.h" |
50 | ||
9d43cf64 | 51 | #define NVME_Q_DEPTH 1024 |
d31af0a3 | 52 | #define NVME_AQ_DEPTH 256 |
b60503ba MW |
53 | #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) |
54 | #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) | |
c965809c | 55 | |
adf68f21 CH |
56 | /* |
57 | * We handle AEN commands ourselves and don't even let the | |
58 | * block layer know about them. | |
59 | */ | |
f866fc42 | 60 | #define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AERS) |
9d43cf64 | 61 | |
58ffacb5 MW |
62 | static int use_threaded_interrupts; |
63 | module_param(use_threaded_interrupts, int, 0); | |
64 | ||
8ffaadf7 JD |
65 | static bool use_cmb_sqes = true; |
66 | module_param(use_cmb_sqes, bool, 0644); | |
67 | MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); | |
68 | ||
87ad72a5 CH |
69 | static unsigned int max_host_mem_size_mb = 128; |
70 | module_param(max_host_mem_size_mb, uint, 0444); | |
71 | MODULE_PARM_DESC(max_host_mem_size_mb, | |
72 | "Maximum Host Memory Buffer (HMB) size per controller (in MiB)"); | |
73 | ||
1c63dc66 CH |
74 | struct nvme_dev; |
75 | struct nvme_queue; | |
b3fffdef | 76 | |
4cc06521 | 77 | static int nvme_reset(struct nvme_dev *dev); |
a0fa9647 | 78 | static void nvme_process_cq(struct nvme_queue *nvmeq); |
a5cdb68c | 79 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown); |
d4b4ff8e | 80 | |
1c63dc66 CH |
81 | /* |
82 | * Represents an NVM Express device. Each nvme_dev is a PCI function. | |
83 | */ | |
84 | struct nvme_dev { | |
1c63dc66 CH |
85 | struct nvme_queue **queues; |
86 | struct blk_mq_tag_set tagset; | |
87 | struct blk_mq_tag_set admin_tagset; | |
88 | u32 __iomem *dbs; | |
89 | struct device *dev; | |
90 | struct dma_pool *prp_page_pool; | |
91 | struct dma_pool *prp_small_pool; | |
92 | unsigned queue_count; | |
93 | unsigned online_queues; | |
94 | unsigned max_qid; | |
95 | int q_depth; | |
96 | u32 db_stride; | |
1c63dc66 | 97 | void __iomem *bar; |
1c63dc66 | 98 | struct work_struct reset_work; |
5c8809e6 | 99 | struct work_struct remove_work; |
2d55cd5f | 100 | struct timer_list watchdog_timer; |
77bf25ea | 101 | struct mutex shutdown_lock; |
1c63dc66 | 102 | bool subsystem; |
1c63dc66 CH |
103 | void __iomem *cmb; |
104 | dma_addr_t cmb_dma_addr; | |
105 | u64 cmb_size; | |
106 | u32 cmbsz; | |
202021c1 | 107 | u32 cmbloc; |
1c63dc66 | 108 | struct nvme_ctrl ctrl; |
db3cbfff | 109 | struct completion ioq_wait; |
87ad72a5 CH |
110 | |
111 | /* shadow doorbell buffer support: */ | |
f9f38e33 HK |
112 | u32 *dbbuf_dbs; |
113 | dma_addr_t dbbuf_dbs_dma_addr; | |
114 | u32 *dbbuf_eis; | |
115 | dma_addr_t dbbuf_eis_dma_addr; | |
87ad72a5 CH |
116 | |
117 | /* host memory buffer support: */ | |
118 | u64 host_mem_size; | |
119 | u32 nr_host_mem_descs; | |
120 | struct nvme_host_mem_buf_desc *host_mem_descs; | |
121 | void **host_mem_desc_bufs; | |
4d115420 | 122 | }; |
1fa6aead | 123 | |
f9f38e33 HK |
124 | static inline unsigned int sq_idx(unsigned int qid, u32 stride) |
125 | { | |
126 | return qid * 2 * stride; | |
127 | } | |
128 | ||
129 | static inline unsigned int cq_idx(unsigned int qid, u32 stride) | |
130 | { | |
131 | return (qid * 2 + 1) * stride; | |
132 | } | |
133 | ||
1c63dc66 CH |
134 | static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) |
135 | { | |
136 | return container_of(ctrl, struct nvme_dev, ctrl); | |
137 | } | |
138 | ||
b60503ba MW |
139 | /* |
140 | * An NVM Express queue. Each device has at least two (one for admin | |
141 | * commands and one for I/O commands). | |
142 | */ | |
143 | struct nvme_queue { | |
144 | struct device *q_dmadev; | |
091b6092 | 145 | struct nvme_dev *dev; |
b60503ba MW |
146 | spinlock_t q_lock; |
147 | struct nvme_command *sq_cmds; | |
8ffaadf7 | 148 | struct nvme_command __iomem *sq_cmds_io; |
b60503ba | 149 | volatile struct nvme_completion *cqes; |
42483228 | 150 | struct blk_mq_tags **tags; |
b60503ba MW |
151 | dma_addr_t sq_dma_addr; |
152 | dma_addr_t cq_dma_addr; | |
b60503ba MW |
153 | u32 __iomem *q_db; |
154 | u16 q_depth; | |
6222d172 | 155 | s16 cq_vector; |
b60503ba MW |
156 | u16 sq_tail; |
157 | u16 cq_head; | |
c30341dc | 158 | u16 qid; |
e9539f47 MW |
159 | u8 cq_phase; |
160 | u8 cqe_seen; | |
f9f38e33 HK |
161 | u32 *dbbuf_sq_db; |
162 | u32 *dbbuf_cq_db; | |
163 | u32 *dbbuf_sq_ei; | |
164 | u32 *dbbuf_cq_ei; | |
b60503ba MW |
165 | }; |
166 | ||
71bd150c CH |
167 | /* |
168 | * The nvme_iod describes the data in an I/O, including the list of PRP | |
169 | * entries. You can't see it in this data structure because C doesn't let | |
f4800d6d | 170 | * me express that. Use nvme_init_iod to ensure there's enough space |
71bd150c CH |
171 | * allocated to store the PRP list. |
172 | */ | |
173 | struct nvme_iod { | |
d49187e9 | 174 | struct nvme_request req; |
f4800d6d CH |
175 | struct nvme_queue *nvmeq; |
176 | int aborted; | |
71bd150c | 177 | int npages; /* In the PRP list. 0 means small pool in use */ |
71bd150c CH |
178 | int nents; /* Used in scatterlist */ |
179 | int length; /* Of data, in bytes */ | |
180 | dma_addr_t first_dma; | |
bf684057 | 181 | struct scatterlist meta_sg; /* metadata requires single contiguous buffer */ |
f4800d6d CH |
182 | struct scatterlist *sg; |
183 | struct scatterlist inline_sg[0]; | |
b60503ba MW |
184 | }; |
185 | ||
186 | /* | |
187 | * Check we didin't inadvertently grow the command struct | |
188 | */ | |
189 | static inline void _nvme_check_size(void) | |
190 | { | |
191 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); | |
192 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); | |
193 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); | |
194 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); | |
195 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); | |
f8ebf840 | 196 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
c30341dc | 197 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
b60503ba MW |
198 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
199 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); | |
200 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); | |
201 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); | |
6ecec745 | 202 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
f9f38e33 HK |
203 | BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); |
204 | } | |
205 | ||
206 | static inline unsigned int nvme_dbbuf_size(u32 stride) | |
207 | { | |
208 | return ((num_possible_cpus() + 1) * 8 * stride); | |
209 | } | |
210 | ||
211 | static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev) | |
212 | { | |
213 | unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); | |
214 | ||
215 | if (dev->dbbuf_dbs) | |
216 | return 0; | |
217 | ||
218 | dev->dbbuf_dbs = dma_alloc_coherent(dev->dev, mem_size, | |
219 | &dev->dbbuf_dbs_dma_addr, | |
220 | GFP_KERNEL); | |
221 | if (!dev->dbbuf_dbs) | |
222 | return -ENOMEM; | |
223 | dev->dbbuf_eis = dma_alloc_coherent(dev->dev, mem_size, | |
224 | &dev->dbbuf_eis_dma_addr, | |
225 | GFP_KERNEL); | |
226 | if (!dev->dbbuf_eis) { | |
227 | dma_free_coherent(dev->dev, mem_size, | |
228 | dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); | |
229 | dev->dbbuf_dbs = NULL; | |
230 | return -ENOMEM; | |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | static void nvme_dbbuf_dma_free(struct nvme_dev *dev) | |
237 | { | |
238 | unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); | |
239 | ||
240 | if (dev->dbbuf_dbs) { | |
241 | dma_free_coherent(dev->dev, mem_size, | |
242 | dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); | |
243 | dev->dbbuf_dbs = NULL; | |
244 | } | |
245 | if (dev->dbbuf_eis) { | |
246 | dma_free_coherent(dev->dev, mem_size, | |
247 | dev->dbbuf_eis, dev->dbbuf_eis_dma_addr); | |
248 | dev->dbbuf_eis = NULL; | |
249 | } | |
250 | } | |
251 | ||
252 | static void nvme_dbbuf_init(struct nvme_dev *dev, | |
253 | struct nvme_queue *nvmeq, int qid) | |
254 | { | |
255 | if (!dev->dbbuf_dbs || !qid) | |
256 | return; | |
257 | ||
258 | nvmeq->dbbuf_sq_db = &dev->dbbuf_dbs[sq_idx(qid, dev->db_stride)]; | |
259 | nvmeq->dbbuf_cq_db = &dev->dbbuf_dbs[cq_idx(qid, dev->db_stride)]; | |
260 | nvmeq->dbbuf_sq_ei = &dev->dbbuf_eis[sq_idx(qid, dev->db_stride)]; | |
261 | nvmeq->dbbuf_cq_ei = &dev->dbbuf_eis[cq_idx(qid, dev->db_stride)]; | |
262 | } | |
263 | ||
264 | static void nvme_dbbuf_set(struct nvme_dev *dev) | |
265 | { | |
266 | struct nvme_command c; | |
267 | ||
268 | if (!dev->dbbuf_dbs) | |
269 | return; | |
270 | ||
271 | memset(&c, 0, sizeof(c)); | |
272 | c.dbbuf.opcode = nvme_admin_dbbuf; | |
273 | c.dbbuf.prp1 = cpu_to_le64(dev->dbbuf_dbs_dma_addr); | |
274 | c.dbbuf.prp2 = cpu_to_le64(dev->dbbuf_eis_dma_addr); | |
275 | ||
276 | if (nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0)) { | |
9bdcfb10 | 277 | dev_warn(dev->ctrl.device, "unable to set dbbuf\n"); |
f9f38e33 HK |
278 | /* Free memory and continue on */ |
279 | nvme_dbbuf_dma_free(dev); | |
280 | } | |
281 | } | |
282 | ||
283 | static inline int nvme_dbbuf_need_event(u16 event_idx, u16 new_idx, u16 old) | |
284 | { | |
285 | return (u16)(new_idx - event_idx - 1) < (u16)(new_idx - old); | |
286 | } | |
287 | ||
288 | /* Update dbbuf and return true if an MMIO is required */ | |
289 | static bool nvme_dbbuf_update_and_check_event(u16 value, u32 *dbbuf_db, | |
290 | volatile u32 *dbbuf_ei) | |
291 | { | |
292 | if (dbbuf_db) { | |
293 | u16 old_value; | |
294 | ||
295 | /* | |
296 | * Ensure that the queue is written before updating | |
297 | * the doorbell in memory | |
298 | */ | |
299 | wmb(); | |
300 | ||
301 | old_value = *dbbuf_db; | |
302 | *dbbuf_db = value; | |
303 | ||
304 | if (!nvme_dbbuf_need_event(*dbbuf_ei, value, old_value)) | |
305 | return false; | |
306 | } | |
307 | ||
308 | return true; | |
b60503ba MW |
309 | } |
310 | ||
ac3dd5bd JA |
311 | /* |
312 | * Max size of iod being embedded in the request payload | |
313 | */ | |
314 | #define NVME_INT_PAGES 2 | |
5fd4ce1b | 315 | #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) |
ac3dd5bd JA |
316 | |
317 | /* | |
318 | * Will slightly overestimate the number of pages needed. This is OK | |
319 | * as it only leads to a small amount of wasted memory for the lifetime of | |
320 | * the I/O. | |
321 | */ | |
322 | static int nvme_npages(unsigned size, struct nvme_dev *dev) | |
323 | { | |
5fd4ce1b CH |
324 | unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, |
325 | dev->ctrl.page_size); | |
ac3dd5bd JA |
326 | return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); |
327 | } | |
328 | ||
f4800d6d CH |
329 | static unsigned int nvme_iod_alloc_size(struct nvme_dev *dev, |
330 | unsigned int size, unsigned int nseg) | |
ac3dd5bd | 331 | { |
f4800d6d CH |
332 | return sizeof(__le64 *) * nvme_npages(size, dev) + |
333 | sizeof(struct scatterlist) * nseg; | |
334 | } | |
ac3dd5bd | 335 | |
f4800d6d CH |
336 | static unsigned int nvme_cmd_size(struct nvme_dev *dev) |
337 | { | |
338 | return sizeof(struct nvme_iod) + | |
339 | nvme_iod_alloc_size(dev, NVME_INT_BYTES(dev), NVME_INT_PAGES); | |
ac3dd5bd JA |
340 | } |
341 | ||
a4aea562 MB |
342 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
343 | unsigned int hctx_idx) | |
e85248e5 | 344 | { |
a4aea562 MB |
345 | struct nvme_dev *dev = data; |
346 | struct nvme_queue *nvmeq = dev->queues[0]; | |
347 | ||
42483228 KB |
348 | WARN_ON(hctx_idx != 0); |
349 | WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); | |
350 | WARN_ON(nvmeq->tags); | |
351 | ||
a4aea562 | 352 | hctx->driver_data = nvmeq; |
42483228 | 353 | nvmeq->tags = &dev->admin_tagset.tags[0]; |
a4aea562 | 354 | return 0; |
e85248e5 MW |
355 | } |
356 | ||
4af0e21c KB |
357 | static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) |
358 | { | |
359 | struct nvme_queue *nvmeq = hctx->driver_data; | |
360 | ||
361 | nvmeq->tags = NULL; | |
362 | } | |
363 | ||
d6296d39 CH |
364 | static int nvme_admin_init_request(struct blk_mq_tag_set *set, |
365 | struct request *req, unsigned int hctx_idx, | |
366 | unsigned int numa_node) | |
22404274 | 367 | { |
d6296d39 | 368 | struct nvme_dev *dev = set->driver_data; |
f4800d6d | 369 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a4aea562 MB |
370 | struct nvme_queue *nvmeq = dev->queues[0]; |
371 | ||
372 | BUG_ON(!nvmeq); | |
f4800d6d | 373 | iod->nvmeq = nvmeq; |
a4aea562 | 374 | return 0; |
22404274 KB |
375 | } |
376 | ||
a4aea562 MB |
377 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
378 | unsigned int hctx_idx) | |
b60503ba | 379 | { |
a4aea562 | 380 | struct nvme_dev *dev = data; |
42483228 | 381 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
a4aea562 | 382 | |
42483228 KB |
383 | if (!nvmeq->tags) |
384 | nvmeq->tags = &dev->tagset.tags[hctx_idx]; | |
b60503ba | 385 | |
42483228 | 386 | WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); |
a4aea562 MB |
387 | hctx->driver_data = nvmeq; |
388 | return 0; | |
b60503ba MW |
389 | } |
390 | ||
d6296d39 CH |
391 | static int nvme_init_request(struct blk_mq_tag_set *set, struct request *req, |
392 | unsigned int hctx_idx, unsigned int numa_node) | |
b60503ba | 393 | { |
d6296d39 | 394 | struct nvme_dev *dev = set->driver_data; |
f4800d6d | 395 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a4aea562 MB |
396 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
397 | ||
398 | BUG_ON(!nvmeq); | |
f4800d6d | 399 | iod->nvmeq = nvmeq; |
a4aea562 MB |
400 | return 0; |
401 | } | |
402 | ||
dca51e78 CH |
403 | static int nvme_pci_map_queues(struct blk_mq_tag_set *set) |
404 | { | |
405 | struct nvme_dev *dev = set->driver_data; | |
406 | ||
407 | return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev)); | |
408 | } | |
409 | ||
b60503ba | 410 | /** |
adf68f21 | 411 | * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell |
b60503ba MW |
412 | * @nvmeq: The queue to use |
413 | * @cmd: The command to send | |
414 | * | |
415 | * Safe to use from interrupt context | |
416 | */ | |
e3f879bf SB |
417 | static void __nvme_submit_cmd(struct nvme_queue *nvmeq, |
418 | struct nvme_command *cmd) | |
b60503ba | 419 | { |
a4aea562 MB |
420 | u16 tail = nvmeq->sq_tail; |
421 | ||
8ffaadf7 JD |
422 | if (nvmeq->sq_cmds_io) |
423 | memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); | |
424 | else | |
425 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); | |
426 | ||
b60503ba MW |
427 | if (++tail == nvmeq->q_depth) |
428 | tail = 0; | |
f9f38e33 HK |
429 | if (nvme_dbbuf_update_and_check_event(tail, nvmeq->dbbuf_sq_db, |
430 | nvmeq->dbbuf_sq_ei)) | |
431 | writel(tail, nvmeq->q_db); | |
b60503ba | 432 | nvmeq->sq_tail = tail; |
b60503ba MW |
433 | } |
434 | ||
f4800d6d | 435 | static __le64 **iod_list(struct request *req) |
b60503ba | 436 | { |
f4800d6d | 437 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
f9d03f96 | 438 | return (__le64 **)(iod->sg + blk_rq_nr_phys_segments(req)); |
b60503ba MW |
439 | } |
440 | ||
fc17b653 | 441 | static blk_status_t nvme_init_iod(struct request *rq, struct nvme_dev *dev) |
ac3dd5bd | 442 | { |
f4800d6d | 443 | struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); |
f9d03f96 | 444 | int nseg = blk_rq_nr_phys_segments(rq); |
b131c61d | 445 | unsigned int size = blk_rq_payload_bytes(rq); |
ac3dd5bd | 446 | |
f4800d6d CH |
447 | if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { |
448 | iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC); | |
449 | if (!iod->sg) | |
fc17b653 | 450 | return BLK_STS_RESOURCE; |
f4800d6d CH |
451 | } else { |
452 | iod->sg = iod->inline_sg; | |
ac3dd5bd JA |
453 | } |
454 | ||
f4800d6d CH |
455 | iod->aborted = 0; |
456 | iod->npages = -1; | |
457 | iod->nents = 0; | |
458 | iod->length = size; | |
f80ec966 | 459 | |
fc17b653 | 460 | return BLK_STS_OK; |
ac3dd5bd JA |
461 | } |
462 | ||
f4800d6d | 463 | static void nvme_free_iod(struct nvme_dev *dev, struct request *req) |
b60503ba | 464 | { |
f4800d6d | 465 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
5fd4ce1b | 466 | const int last_prp = dev->ctrl.page_size / 8 - 1; |
eca18b23 | 467 | int i; |
f4800d6d | 468 | __le64 **list = iod_list(req); |
eca18b23 MW |
469 | dma_addr_t prp_dma = iod->first_dma; |
470 | ||
471 | if (iod->npages == 0) | |
472 | dma_pool_free(dev->prp_small_pool, list[0], prp_dma); | |
473 | for (i = 0; i < iod->npages; i++) { | |
474 | __le64 *prp_list = list[i]; | |
475 | dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); | |
476 | dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); | |
477 | prp_dma = next_prp_dma; | |
478 | } | |
ac3dd5bd | 479 | |
f4800d6d CH |
480 | if (iod->sg != iod->inline_sg) |
481 | kfree(iod->sg); | |
b4ff9c8d KB |
482 | } |
483 | ||
52b68d7e | 484 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
e1e5e564 KB |
485 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
486 | { | |
487 | if (be32_to_cpu(pi->ref_tag) == v) | |
488 | pi->ref_tag = cpu_to_be32(p); | |
489 | } | |
490 | ||
491 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
492 | { | |
493 | if (be32_to_cpu(pi->ref_tag) == p) | |
494 | pi->ref_tag = cpu_to_be32(v); | |
495 | } | |
496 | ||
497 | /** | |
498 | * nvme_dif_remap - remaps ref tags to bip seed and physical lba | |
499 | * | |
500 | * The virtual start sector is the one that was originally submitted by the | |
501 | * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical | |
502 | * start sector may be different. Remap protection information to match the | |
503 | * physical LBA on writes, and back to the original seed on reads. | |
504 | * | |
505 | * Type 0 and 3 do not have a ref tag, so no remapping required. | |
506 | */ | |
507 | static void nvme_dif_remap(struct request *req, | |
508 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
509 | { | |
510 | struct nvme_ns *ns = req->rq_disk->private_data; | |
511 | struct bio_integrity_payload *bip; | |
512 | struct t10_pi_tuple *pi; | |
513 | void *p, *pmap; | |
514 | u32 i, nlb, ts, phys, virt; | |
515 | ||
516 | if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) | |
517 | return; | |
518 | ||
519 | bip = bio_integrity(req->bio); | |
520 | if (!bip) | |
521 | return; | |
522 | ||
523 | pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; | |
e1e5e564 KB |
524 | |
525 | p = pmap; | |
526 | virt = bip_get_seed(bip); | |
527 | phys = nvme_block_nr(ns, blk_rq_pos(req)); | |
528 | nlb = (blk_rq_bytes(req) >> ns->lba_shift); | |
ac6fc48c | 529 | ts = ns->disk->queue->integrity.tuple_size; |
e1e5e564 KB |
530 | |
531 | for (i = 0; i < nlb; i++, virt++, phys++) { | |
532 | pi = (struct t10_pi_tuple *)p; | |
533 | dif_swap(phys, virt, pi); | |
534 | p += ts; | |
535 | } | |
536 | kunmap_atomic(pmap); | |
537 | } | |
52b68d7e KB |
538 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
539 | static void nvme_dif_remap(struct request *req, | |
540 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
541 | { | |
542 | } | |
543 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) | |
544 | { | |
545 | } | |
546 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
547 | { | |
548 | } | |
52b68d7e KB |
549 | #endif |
550 | ||
b131c61d | 551 | static bool nvme_setup_prps(struct nvme_dev *dev, struct request *req) |
ff22b54f | 552 | { |
f4800d6d | 553 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
99802a7a | 554 | struct dma_pool *pool; |
b131c61d | 555 | int length = blk_rq_payload_bytes(req); |
eca18b23 | 556 | struct scatterlist *sg = iod->sg; |
ff22b54f MW |
557 | int dma_len = sg_dma_len(sg); |
558 | u64 dma_addr = sg_dma_address(sg); | |
5fd4ce1b | 559 | u32 page_size = dev->ctrl.page_size; |
f137e0f1 | 560 | int offset = dma_addr & (page_size - 1); |
e025344c | 561 | __le64 *prp_list; |
f4800d6d | 562 | __le64 **list = iod_list(req); |
e025344c | 563 | dma_addr_t prp_dma; |
eca18b23 | 564 | int nprps, i; |
ff22b54f | 565 | |
1d090624 | 566 | length -= (page_size - offset); |
ff22b54f | 567 | if (length <= 0) |
69d2b571 | 568 | return true; |
ff22b54f | 569 | |
1d090624 | 570 | dma_len -= (page_size - offset); |
ff22b54f | 571 | if (dma_len) { |
1d090624 | 572 | dma_addr += (page_size - offset); |
ff22b54f MW |
573 | } else { |
574 | sg = sg_next(sg); | |
575 | dma_addr = sg_dma_address(sg); | |
576 | dma_len = sg_dma_len(sg); | |
577 | } | |
578 | ||
1d090624 | 579 | if (length <= page_size) { |
edd10d33 | 580 | iod->first_dma = dma_addr; |
69d2b571 | 581 | return true; |
e025344c SMM |
582 | } |
583 | ||
1d090624 | 584 | nprps = DIV_ROUND_UP(length, page_size); |
99802a7a MW |
585 | if (nprps <= (256 / 8)) { |
586 | pool = dev->prp_small_pool; | |
eca18b23 | 587 | iod->npages = 0; |
99802a7a MW |
588 | } else { |
589 | pool = dev->prp_page_pool; | |
eca18b23 | 590 | iod->npages = 1; |
99802a7a MW |
591 | } |
592 | ||
69d2b571 | 593 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
b77954cb | 594 | if (!prp_list) { |
edd10d33 | 595 | iod->first_dma = dma_addr; |
eca18b23 | 596 | iod->npages = -1; |
69d2b571 | 597 | return false; |
b77954cb | 598 | } |
eca18b23 MW |
599 | list[0] = prp_list; |
600 | iod->first_dma = prp_dma; | |
e025344c SMM |
601 | i = 0; |
602 | for (;;) { | |
1d090624 | 603 | if (i == page_size >> 3) { |
e025344c | 604 | __le64 *old_prp_list = prp_list; |
69d2b571 | 605 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
eca18b23 | 606 | if (!prp_list) |
69d2b571 | 607 | return false; |
eca18b23 | 608 | list[iod->npages++] = prp_list; |
7523d834 MW |
609 | prp_list[0] = old_prp_list[i - 1]; |
610 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); | |
611 | i = 1; | |
e025344c SMM |
612 | } |
613 | prp_list[i++] = cpu_to_le64(dma_addr); | |
1d090624 KB |
614 | dma_len -= page_size; |
615 | dma_addr += page_size; | |
616 | length -= page_size; | |
e025344c SMM |
617 | if (length <= 0) |
618 | break; | |
619 | if (dma_len > 0) | |
620 | continue; | |
621 | BUG_ON(dma_len < 0); | |
622 | sg = sg_next(sg); | |
623 | dma_addr = sg_dma_address(sg); | |
624 | dma_len = sg_dma_len(sg); | |
ff22b54f MW |
625 | } |
626 | ||
69d2b571 | 627 | return true; |
ff22b54f MW |
628 | } |
629 | ||
fc17b653 | 630 | static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, |
b131c61d | 631 | struct nvme_command *cmnd) |
d29ec824 | 632 | { |
f4800d6d | 633 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
ba1ca37e CH |
634 | struct request_queue *q = req->q; |
635 | enum dma_data_direction dma_dir = rq_data_dir(req) ? | |
636 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
fc17b653 | 637 | blk_status_t ret = BLK_STS_IOERR; |
d29ec824 | 638 | |
f9d03f96 | 639 | sg_init_table(iod->sg, blk_rq_nr_phys_segments(req)); |
ba1ca37e CH |
640 | iod->nents = blk_rq_map_sg(q, req, iod->sg); |
641 | if (!iod->nents) | |
642 | goto out; | |
d29ec824 | 643 | |
fc17b653 | 644 | ret = BLK_STS_RESOURCE; |
2b6b535d MFO |
645 | if (!dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir, |
646 | DMA_ATTR_NO_WARN)) | |
ba1ca37e | 647 | goto out; |
d29ec824 | 648 | |
b131c61d | 649 | if (!nvme_setup_prps(dev, req)) |
ba1ca37e | 650 | goto out_unmap; |
0e5e4f0e | 651 | |
fc17b653 | 652 | ret = BLK_STS_IOERR; |
ba1ca37e CH |
653 | if (blk_integrity_rq(req)) { |
654 | if (blk_rq_count_integrity_sg(q, req->bio) != 1) | |
655 | goto out_unmap; | |
0e5e4f0e | 656 | |
bf684057 CH |
657 | sg_init_table(&iod->meta_sg, 1); |
658 | if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) | |
ba1ca37e | 659 | goto out_unmap; |
0e5e4f0e | 660 | |
ba1ca37e CH |
661 | if (rq_data_dir(req)) |
662 | nvme_dif_remap(req, nvme_dif_prep); | |
0e5e4f0e | 663 | |
bf684057 | 664 | if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) |
ba1ca37e | 665 | goto out_unmap; |
d29ec824 | 666 | } |
00df5cb4 | 667 | |
eb793e2c CH |
668 | cmnd->rw.dptr.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
669 | cmnd->rw.dptr.prp2 = cpu_to_le64(iod->first_dma); | |
ba1ca37e | 670 | if (blk_integrity_rq(req)) |
bf684057 | 671 | cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg)); |
fc17b653 | 672 | return BLK_STS_OK; |
00df5cb4 | 673 | |
ba1ca37e CH |
674 | out_unmap: |
675 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
676 | out: | |
677 | return ret; | |
00df5cb4 MW |
678 | } |
679 | ||
f4800d6d | 680 | static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) |
b60503ba | 681 | { |
f4800d6d | 682 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
d4f6c3ab CH |
683 | enum dma_data_direction dma_dir = rq_data_dir(req) ? |
684 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
685 | ||
686 | if (iod->nents) { | |
687 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
688 | if (blk_integrity_rq(req)) { | |
689 | if (!rq_data_dir(req)) | |
690 | nvme_dif_remap(req, nvme_dif_complete); | |
bf684057 | 691 | dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); |
e1e5e564 | 692 | } |
e19b127f | 693 | } |
e1e5e564 | 694 | |
f9d03f96 | 695 | nvme_cleanup_cmd(req); |
f4800d6d | 696 | nvme_free_iod(dev, req); |
d4f6c3ab | 697 | } |
b60503ba | 698 | |
d29ec824 CH |
699 | /* |
700 | * NOTE: ns is NULL when called on the admin queue. | |
701 | */ | |
fc17b653 | 702 | static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
a4aea562 | 703 | const struct blk_mq_queue_data *bd) |
edd10d33 | 704 | { |
a4aea562 MB |
705 | struct nvme_ns *ns = hctx->queue->queuedata; |
706 | struct nvme_queue *nvmeq = hctx->driver_data; | |
d29ec824 | 707 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 | 708 | struct request *req = bd->rq; |
ba1ca37e | 709 | struct nvme_command cmnd; |
fc17b653 | 710 | blk_status_t ret = BLK_STS_OK; |
edd10d33 | 711 | |
e1e5e564 KB |
712 | /* |
713 | * If formated with metadata, require the block layer provide a buffer | |
714 | * unless this namespace is formated such that the metadata can be | |
715 | * stripped/generated by the controller with PRACT=1. | |
716 | */ | |
d29ec824 | 717 | if (ns && ns->ms && !blk_integrity_rq(req)) { |
71feb364 | 718 | if (!(ns->pi_type && ns->ms == 8) && |
fc17b653 CH |
719 | !blk_rq_is_passthrough(req)) |
720 | return BLK_STS_NOTSUPP; | |
e1e5e564 KB |
721 | } |
722 | ||
f9d03f96 | 723 | ret = nvme_setup_cmd(ns, req, &cmnd); |
fc17b653 | 724 | if (ret) |
f4800d6d | 725 | return ret; |
a4aea562 | 726 | |
b131c61d | 727 | ret = nvme_init_iod(req, dev); |
fc17b653 | 728 | if (ret) |
f9d03f96 | 729 | goto out_free_cmd; |
a4aea562 | 730 | |
fc17b653 | 731 | if (blk_rq_nr_phys_segments(req)) { |
b131c61d | 732 | ret = nvme_map_data(dev, req, &cmnd); |
fc17b653 CH |
733 | if (ret) |
734 | goto out_cleanup_iod; | |
735 | } | |
a4aea562 | 736 | |
aae239e1 | 737 | blk_mq_start_request(req); |
a4aea562 | 738 | |
ba1ca37e | 739 | spin_lock_irq(&nvmeq->q_lock); |
ae1fba20 | 740 | if (unlikely(nvmeq->cq_vector < 0)) { |
fc17b653 | 741 | ret = BLK_STS_IOERR; |
ae1fba20 | 742 | spin_unlock_irq(&nvmeq->q_lock); |
f9d03f96 | 743 | goto out_cleanup_iod; |
ae1fba20 | 744 | } |
ba1ca37e | 745 | __nvme_submit_cmd(nvmeq, &cmnd); |
a4aea562 MB |
746 | nvme_process_cq(nvmeq); |
747 | spin_unlock_irq(&nvmeq->q_lock); | |
fc17b653 | 748 | return BLK_STS_OK; |
f9d03f96 | 749 | out_cleanup_iod: |
f4800d6d | 750 | nvme_free_iod(dev, req); |
f9d03f96 CH |
751 | out_free_cmd: |
752 | nvme_cleanup_cmd(req); | |
ba1ca37e | 753 | return ret; |
b60503ba | 754 | } |
e1e5e564 | 755 | |
77f02a7a | 756 | static void nvme_pci_complete_rq(struct request *req) |
eee417b0 | 757 | { |
f4800d6d | 758 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a4aea562 | 759 | |
77f02a7a CH |
760 | nvme_unmap_data(iod->nvmeq->dev, req); |
761 | nvme_complete_rq(req); | |
b60503ba MW |
762 | } |
763 | ||
d783e0bd MR |
764 | /* We read the CQE phase first to check if the rest of the entry is valid */ |
765 | static inline bool nvme_cqe_valid(struct nvme_queue *nvmeq, u16 head, | |
766 | u16 phase) | |
767 | { | |
768 | return (le16_to_cpu(nvmeq->cqes[head].status) & 1) == phase; | |
769 | } | |
770 | ||
a0fa9647 | 771 | static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) |
b60503ba | 772 | { |
82123460 | 773 | u16 head, phase; |
b60503ba | 774 | |
b60503ba | 775 | head = nvmeq->cq_head; |
82123460 | 776 | phase = nvmeq->cq_phase; |
b60503ba | 777 | |
d783e0bd | 778 | while (nvme_cqe_valid(nvmeq, head, phase)) { |
b60503ba | 779 | struct nvme_completion cqe = nvmeq->cqes[head]; |
eee417b0 | 780 | struct request *req; |
adf68f21 | 781 | |
b60503ba MW |
782 | if (++head == nvmeq->q_depth) { |
783 | head = 0; | |
82123460 | 784 | phase = !phase; |
b60503ba | 785 | } |
adf68f21 | 786 | |
a0fa9647 JA |
787 | if (tag && *tag == cqe.command_id) |
788 | *tag = -1; | |
adf68f21 | 789 | |
aae239e1 | 790 | if (unlikely(cqe.command_id >= nvmeq->q_depth)) { |
1b3c47c1 | 791 | dev_warn(nvmeq->dev->ctrl.device, |
aae239e1 CH |
792 | "invalid id %d completed on queue %d\n", |
793 | cqe.command_id, le16_to_cpu(cqe.sq_id)); | |
794 | continue; | |
795 | } | |
796 | ||
adf68f21 CH |
797 | /* |
798 | * AEN requests are special as they don't time out and can | |
799 | * survive any kind of queue freeze and often don't respond to | |
800 | * aborts. We don't even bother to allocate a struct request | |
801 | * for them but rather special case them here. | |
802 | */ | |
803 | if (unlikely(nvmeq->qid == 0 && | |
804 | cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { | |
7bf58533 CH |
805 | nvme_complete_async_event(&nvmeq->dev->ctrl, |
806 | cqe.status, &cqe.result); | |
adf68f21 CH |
807 | continue; |
808 | } | |
809 | ||
eee417b0 | 810 | req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); |
27fa9bc5 | 811 | nvme_end_request(req, cqe.status, cqe.result); |
b60503ba MW |
812 | } |
813 | ||
82123460 | 814 | if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) |
a0fa9647 | 815 | return; |
b60503ba | 816 | |
604e8c8d | 817 | if (likely(nvmeq->cq_vector >= 0)) |
f9f38e33 HK |
818 | if (nvme_dbbuf_update_and_check_event(head, nvmeq->dbbuf_cq_db, |
819 | nvmeq->dbbuf_cq_ei)) | |
820 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); | |
b60503ba | 821 | nvmeq->cq_head = head; |
82123460 | 822 | nvmeq->cq_phase = phase; |
b60503ba | 823 | |
e9539f47 | 824 | nvmeq->cqe_seen = 1; |
a0fa9647 JA |
825 | } |
826 | ||
827 | static void nvme_process_cq(struct nvme_queue *nvmeq) | |
828 | { | |
829 | __nvme_process_cq(nvmeq, NULL); | |
b60503ba MW |
830 | } |
831 | ||
832 | static irqreturn_t nvme_irq(int irq, void *data) | |
58ffacb5 MW |
833 | { |
834 | irqreturn_t result; | |
835 | struct nvme_queue *nvmeq = data; | |
836 | spin_lock(&nvmeq->q_lock); | |
e9539f47 MW |
837 | nvme_process_cq(nvmeq); |
838 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; | |
839 | nvmeq->cqe_seen = 0; | |
58ffacb5 MW |
840 | spin_unlock(&nvmeq->q_lock); |
841 | return result; | |
842 | } | |
843 | ||
844 | static irqreturn_t nvme_irq_check(int irq, void *data) | |
845 | { | |
846 | struct nvme_queue *nvmeq = data; | |
d783e0bd MR |
847 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) |
848 | return IRQ_WAKE_THREAD; | |
849 | return IRQ_NONE; | |
58ffacb5 MW |
850 | } |
851 | ||
7776db1c | 852 | static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag) |
a0fa9647 | 853 | { |
d783e0bd | 854 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) { |
a0fa9647 JA |
855 | spin_lock_irq(&nvmeq->q_lock); |
856 | __nvme_process_cq(nvmeq, &tag); | |
857 | spin_unlock_irq(&nvmeq->q_lock); | |
858 | ||
859 | if (tag == -1) | |
860 | return 1; | |
861 | } | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
7776db1c KB |
866 | static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) |
867 | { | |
868 | struct nvme_queue *nvmeq = hctx->driver_data; | |
869 | ||
870 | return __nvme_poll(nvmeq, tag); | |
871 | } | |
872 | ||
f866fc42 | 873 | static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx) |
b60503ba | 874 | { |
f866fc42 | 875 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
9396dec9 | 876 | struct nvme_queue *nvmeq = dev->queues[0]; |
a4aea562 | 877 | struct nvme_command c; |
b60503ba | 878 | |
a4aea562 MB |
879 | memset(&c, 0, sizeof(c)); |
880 | c.common.opcode = nvme_admin_async_event; | |
f866fc42 | 881 | c.common.command_id = NVME_AQ_BLKMQ_DEPTH + aer_idx; |
3c0cf138 | 882 | |
9396dec9 | 883 | spin_lock_irq(&nvmeq->q_lock); |
f866fc42 | 884 | __nvme_submit_cmd(nvmeq, &c); |
9396dec9 | 885 | spin_unlock_irq(&nvmeq->q_lock); |
f705f837 CH |
886 | } |
887 | ||
b60503ba | 888 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
f705f837 | 889 | { |
b60503ba MW |
890 | struct nvme_command c; |
891 | ||
892 | memset(&c, 0, sizeof(c)); | |
893 | c.delete_queue.opcode = opcode; | |
894 | c.delete_queue.qid = cpu_to_le16(id); | |
895 | ||
1c63dc66 | 896 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
897 | } |
898 | ||
b60503ba MW |
899 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, |
900 | struct nvme_queue *nvmeq) | |
901 | { | |
b60503ba MW |
902 | struct nvme_command c; |
903 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; | |
904 | ||
d29ec824 CH |
905 | /* |
906 | * Note: we (ab)use the fact the the prp fields survive if no data | |
907 | * is attached to the request. | |
908 | */ | |
b60503ba MW |
909 | memset(&c, 0, sizeof(c)); |
910 | c.create_cq.opcode = nvme_admin_create_cq; | |
911 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); | |
912 | c.create_cq.cqid = cpu_to_le16(qid); | |
913 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
914 | c.create_cq.cq_flags = cpu_to_le16(flags); | |
915 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); | |
916 | ||
1c63dc66 | 917 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
918 | } |
919 | ||
920 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, | |
921 | struct nvme_queue *nvmeq) | |
922 | { | |
b60503ba | 923 | struct nvme_command c; |
81c1cd98 | 924 | int flags = NVME_QUEUE_PHYS_CONTIG; |
b60503ba | 925 | |
d29ec824 CH |
926 | /* |
927 | * Note: we (ab)use the fact the the prp fields survive if no data | |
928 | * is attached to the request. | |
929 | */ | |
b60503ba MW |
930 | memset(&c, 0, sizeof(c)); |
931 | c.create_sq.opcode = nvme_admin_create_sq; | |
932 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); | |
933 | c.create_sq.sqid = cpu_to_le16(qid); | |
934 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
935 | c.create_sq.sq_flags = cpu_to_le16(flags); | |
936 | c.create_sq.cqid = cpu_to_le16(qid); | |
937 | ||
1c63dc66 | 938 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
939 | } |
940 | ||
941 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) | |
942 | { | |
943 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); | |
944 | } | |
945 | ||
946 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) | |
947 | { | |
948 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); | |
949 | } | |
950 | ||
2a842aca | 951 | static void abort_endio(struct request *req, blk_status_t error) |
bc5fc7e4 | 952 | { |
f4800d6d CH |
953 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
954 | struct nvme_queue *nvmeq = iod->nvmeq; | |
e44ac588 | 955 | |
27fa9bc5 CH |
956 | dev_warn(nvmeq->dev->ctrl.device, |
957 | "Abort status: 0x%x", nvme_req(req)->status); | |
e7a2a87d | 958 | atomic_inc(&nvmeq->dev->ctrl.abort_limit); |
e7a2a87d | 959 | blk_mq_free_request(req); |
bc5fc7e4 MW |
960 | } |
961 | ||
31c7c7d2 | 962 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
c30341dc | 963 | { |
f4800d6d CH |
964 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
965 | struct nvme_queue *nvmeq = iod->nvmeq; | |
c30341dc | 966 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 | 967 | struct request *abort_req; |
a4aea562 | 968 | struct nvme_command cmd; |
c30341dc | 969 | |
7776db1c KB |
970 | /* |
971 | * Did we miss an interrupt? | |
972 | */ | |
973 | if (__nvme_poll(nvmeq, req->tag)) { | |
974 | dev_warn(dev->ctrl.device, | |
975 | "I/O %d QID %d timeout, completion polled\n", | |
976 | req->tag, nvmeq->qid); | |
977 | return BLK_EH_HANDLED; | |
978 | } | |
979 | ||
31c7c7d2 | 980 | /* |
fd634f41 CH |
981 | * Shutdown immediately if controller times out while starting. The |
982 | * reset work will see the pci device disabled when it gets the forced | |
983 | * cancellation error. All outstanding requests are completed on | |
984 | * shutdown, so we return BLK_EH_HANDLED. | |
985 | */ | |
bb8d261e | 986 | if (dev->ctrl.state == NVME_CTRL_RESETTING) { |
1b3c47c1 | 987 | dev_warn(dev->ctrl.device, |
fd634f41 CH |
988 | "I/O %d QID %d timeout, disable controller\n", |
989 | req->tag, nvmeq->qid); | |
a5cdb68c | 990 | nvme_dev_disable(dev, false); |
27fa9bc5 | 991 | nvme_req(req)->flags |= NVME_REQ_CANCELLED; |
fd634f41 | 992 | return BLK_EH_HANDLED; |
c30341dc KB |
993 | } |
994 | ||
fd634f41 CH |
995 | /* |
996 | * Shutdown the controller immediately and schedule a reset if the | |
997 | * command was already aborted once before and still hasn't been | |
998 | * returned to the driver, or if this is the admin queue. | |
31c7c7d2 | 999 | */ |
f4800d6d | 1000 | if (!nvmeq->qid || iod->aborted) { |
1b3c47c1 | 1001 | dev_warn(dev->ctrl.device, |
e1569a16 KB |
1002 | "I/O %d QID %d timeout, reset controller\n", |
1003 | req->tag, nvmeq->qid); | |
a5cdb68c | 1004 | nvme_dev_disable(dev, false); |
c5f6ce97 | 1005 | nvme_reset(dev); |
c30341dc | 1006 | |
e1569a16 KB |
1007 | /* |
1008 | * Mark the request as handled, since the inline shutdown | |
1009 | * forces all outstanding requests to complete. | |
1010 | */ | |
27fa9bc5 | 1011 | nvme_req(req)->flags |= NVME_REQ_CANCELLED; |
e1569a16 | 1012 | return BLK_EH_HANDLED; |
c30341dc | 1013 | } |
c30341dc | 1014 | |
e7a2a87d | 1015 | if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { |
6bf25d16 | 1016 | atomic_inc(&dev->ctrl.abort_limit); |
31c7c7d2 | 1017 | return BLK_EH_RESET_TIMER; |
6bf25d16 | 1018 | } |
7bf7d778 | 1019 | iod->aborted = 1; |
a4aea562 | 1020 | |
c30341dc KB |
1021 | memset(&cmd, 0, sizeof(cmd)); |
1022 | cmd.abort.opcode = nvme_admin_abort_cmd; | |
a4aea562 | 1023 | cmd.abort.cid = req->tag; |
c30341dc | 1024 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
c30341dc | 1025 | |
1b3c47c1 SG |
1026 | dev_warn(nvmeq->dev->ctrl.device, |
1027 | "I/O %d QID %d timeout, aborting\n", | |
1028 | req->tag, nvmeq->qid); | |
e7a2a87d CH |
1029 | |
1030 | abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, | |
eb71f435 | 1031 | BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
e7a2a87d CH |
1032 | if (IS_ERR(abort_req)) { |
1033 | atomic_inc(&dev->ctrl.abort_limit); | |
1034 | return BLK_EH_RESET_TIMER; | |
1035 | } | |
1036 | ||
1037 | abort_req->timeout = ADMIN_TIMEOUT; | |
1038 | abort_req->end_io_data = NULL; | |
1039 | blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); | |
c30341dc | 1040 | |
31c7c7d2 CH |
1041 | /* |
1042 | * The aborted req will be completed on receiving the abort req. | |
1043 | * We enable the timer again. If hit twice, it'll cause a device reset, | |
1044 | * as the device then is in a faulty state. | |
1045 | */ | |
1046 | return BLK_EH_RESET_TIMER; | |
c30341dc KB |
1047 | } |
1048 | ||
a4aea562 MB |
1049 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
1050 | { | |
9e866774 MW |
1051 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
1052 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); | |
8ffaadf7 JD |
1053 | if (nvmeq->sq_cmds) |
1054 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), | |
9e866774 MW |
1055 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); |
1056 | kfree(nvmeq); | |
1057 | } | |
1058 | ||
a1a5ef99 | 1059 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
22404274 KB |
1060 | { |
1061 | int i; | |
1062 | ||
a1a5ef99 | 1063 | for (i = dev->queue_count - 1; i >= lowest; i--) { |
a4aea562 | 1064 | struct nvme_queue *nvmeq = dev->queues[i]; |
22404274 | 1065 | dev->queue_count--; |
a4aea562 | 1066 | dev->queues[i] = NULL; |
f435c282 | 1067 | nvme_free_queue(nvmeq); |
121c7ad4 | 1068 | } |
22404274 KB |
1069 | } |
1070 | ||
4d115420 KB |
1071 | /** |
1072 | * nvme_suspend_queue - put queue into suspended state | |
1073 | * @nvmeq - queue to suspend | |
4d115420 KB |
1074 | */ |
1075 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) | |
b60503ba | 1076 | { |
2b25d981 | 1077 | int vector; |
b60503ba | 1078 | |
a09115b2 | 1079 | spin_lock_irq(&nvmeq->q_lock); |
2b25d981 KB |
1080 | if (nvmeq->cq_vector == -1) { |
1081 | spin_unlock_irq(&nvmeq->q_lock); | |
1082 | return 1; | |
1083 | } | |
0ff199cb | 1084 | vector = nvmeq->cq_vector; |
42f61420 | 1085 | nvmeq->dev->online_queues--; |
2b25d981 | 1086 | nvmeq->cq_vector = -1; |
a09115b2 MW |
1087 | spin_unlock_irq(&nvmeq->q_lock); |
1088 | ||
1c63dc66 | 1089 | if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) |
25646264 | 1090 | blk_mq_stop_hw_queues(nvmeq->dev->ctrl.admin_q); |
6df3dbc8 | 1091 | |
0ff199cb | 1092 | pci_free_irq(to_pci_dev(nvmeq->dev->dev), vector, nvmeq); |
b60503ba | 1093 | |
4d115420 KB |
1094 | return 0; |
1095 | } | |
b60503ba | 1096 | |
a5cdb68c | 1097 | static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) |
4d115420 | 1098 | { |
a5cdb68c | 1099 | struct nvme_queue *nvmeq = dev->queues[0]; |
4d115420 KB |
1100 | |
1101 | if (!nvmeq) | |
1102 | return; | |
1103 | if (nvme_suspend_queue(nvmeq)) | |
1104 | return; | |
1105 | ||
a5cdb68c KB |
1106 | if (shutdown) |
1107 | nvme_shutdown_ctrl(&dev->ctrl); | |
1108 | else | |
1109 | nvme_disable_ctrl(&dev->ctrl, lo_hi_readq( | |
1110 | dev->bar + NVME_REG_CAP)); | |
07836e65 KB |
1111 | |
1112 | spin_lock_irq(&nvmeq->q_lock); | |
1113 | nvme_process_cq(nvmeq); | |
1114 | spin_unlock_irq(&nvmeq->q_lock); | |
b60503ba MW |
1115 | } |
1116 | ||
8ffaadf7 JD |
1117 | static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, |
1118 | int entry_size) | |
1119 | { | |
1120 | int q_depth = dev->q_depth; | |
5fd4ce1b CH |
1121 | unsigned q_size_aligned = roundup(q_depth * entry_size, |
1122 | dev->ctrl.page_size); | |
8ffaadf7 JD |
1123 | |
1124 | if (q_size_aligned * nr_io_queues > dev->cmb_size) { | |
c45f5c99 | 1125 | u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); |
5fd4ce1b | 1126 | mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); |
c45f5c99 | 1127 | q_depth = div_u64(mem_per_q, entry_size); |
8ffaadf7 JD |
1128 | |
1129 | /* | |
1130 | * Ensure the reduced q_depth is above some threshold where it | |
1131 | * would be better to map queues in system memory with the | |
1132 | * original depth | |
1133 | */ | |
1134 | if (q_depth < 64) | |
1135 | return -ENOMEM; | |
1136 | } | |
1137 | ||
1138 | return q_depth; | |
1139 | } | |
1140 | ||
1141 | static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, | |
1142 | int qid, int depth) | |
1143 | { | |
1144 | if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { | |
5fd4ce1b CH |
1145 | unsigned offset = (qid - 1) * roundup(SQ_SIZE(depth), |
1146 | dev->ctrl.page_size); | |
8ffaadf7 JD |
1147 | nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; |
1148 | nvmeq->sq_cmds_io = dev->cmb + offset; | |
1149 | } else { | |
1150 | nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), | |
1151 | &nvmeq->sq_dma_addr, GFP_KERNEL); | |
1152 | if (!nvmeq->sq_cmds) | |
1153 | return -ENOMEM; | |
1154 | } | |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
b60503ba | 1159 | static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, |
d3af3ecd | 1160 | int depth, int node) |
b60503ba | 1161 | { |
d3af3ecd SL |
1162 | struct nvme_queue *nvmeq = kzalloc_node(sizeof(*nvmeq), GFP_KERNEL, |
1163 | node); | |
b60503ba MW |
1164 | if (!nvmeq) |
1165 | return NULL; | |
1166 | ||
e75ec752 | 1167 | nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), |
4d51abf9 | 1168 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
b60503ba MW |
1169 | if (!nvmeq->cqes) |
1170 | goto free_nvmeq; | |
b60503ba | 1171 | |
8ffaadf7 | 1172 | if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) |
b60503ba MW |
1173 | goto free_cqdma; |
1174 | ||
e75ec752 | 1175 | nvmeq->q_dmadev = dev->dev; |
091b6092 | 1176 | nvmeq->dev = dev; |
b60503ba MW |
1177 | spin_lock_init(&nvmeq->q_lock); |
1178 | nvmeq->cq_head = 0; | |
82123460 | 1179 | nvmeq->cq_phase = 1; |
b80d5ccc | 1180 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
b60503ba | 1181 | nvmeq->q_depth = depth; |
c30341dc | 1182 | nvmeq->qid = qid; |
758dd7fd | 1183 | nvmeq->cq_vector = -1; |
a4aea562 | 1184 | dev->queues[qid] = nvmeq; |
36a7e993 JD |
1185 | dev->queue_count++; |
1186 | ||
b60503ba MW |
1187 | return nvmeq; |
1188 | ||
1189 | free_cqdma: | |
e75ec752 | 1190 | dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
b60503ba MW |
1191 | nvmeq->cq_dma_addr); |
1192 | free_nvmeq: | |
1193 | kfree(nvmeq); | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
dca51e78 | 1197 | static int queue_request_irq(struct nvme_queue *nvmeq) |
3001082c | 1198 | { |
0ff199cb CH |
1199 | struct pci_dev *pdev = to_pci_dev(nvmeq->dev->dev); |
1200 | int nr = nvmeq->dev->ctrl.instance; | |
1201 | ||
1202 | if (use_threaded_interrupts) { | |
1203 | return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq_check, | |
1204 | nvme_irq, nvmeq, "nvme%dq%d", nr, nvmeq->qid); | |
1205 | } else { | |
1206 | return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq, | |
1207 | NULL, nvmeq, "nvme%dq%d", nr, nvmeq->qid); | |
1208 | } | |
3001082c MW |
1209 | } |
1210 | ||
22404274 | 1211 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
b60503ba | 1212 | { |
22404274 | 1213 | struct nvme_dev *dev = nvmeq->dev; |
b60503ba | 1214 | |
7be50e93 | 1215 | spin_lock_irq(&nvmeq->q_lock); |
22404274 KB |
1216 | nvmeq->sq_tail = 0; |
1217 | nvmeq->cq_head = 0; | |
1218 | nvmeq->cq_phase = 1; | |
b80d5ccc | 1219 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
22404274 | 1220 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
f9f38e33 | 1221 | nvme_dbbuf_init(dev, nvmeq, qid); |
42f61420 | 1222 | dev->online_queues++; |
7be50e93 | 1223 | spin_unlock_irq(&nvmeq->q_lock); |
22404274 KB |
1224 | } |
1225 | ||
1226 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) | |
1227 | { | |
1228 | struct nvme_dev *dev = nvmeq->dev; | |
1229 | int result; | |
3f85d50b | 1230 | |
2b25d981 | 1231 | nvmeq->cq_vector = qid - 1; |
b60503ba MW |
1232 | result = adapter_alloc_cq(dev, qid, nvmeq); |
1233 | if (result < 0) | |
22404274 | 1234 | return result; |
b60503ba MW |
1235 | |
1236 | result = adapter_alloc_sq(dev, qid, nvmeq); | |
1237 | if (result < 0) | |
1238 | goto release_cq; | |
1239 | ||
dca51e78 | 1240 | result = queue_request_irq(nvmeq); |
b60503ba MW |
1241 | if (result < 0) |
1242 | goto release_sq; | |
1243 | ||
22404274 | 1244 | nvme_init_queue(nvmeq, qid); |
22404274 | 1245 | return result; |
b60503ba MW |
1246 | |
1247 | release_sq: | |
1248 | adapter_delete_sq(dev, qid); | |
1249 | release_cq: | |
1250 | adapter_delete_cq(dev, qid); | |
22404274 | 1251 | return result; |
b60503ba MW |
1252 | } |
1253 | ||
f363b089 | 1254 | static const struct blk_mq_ops nvme_mq_admin_ops = { |
d29ec824 | 1255 | .queue_rq = nvme_queue_rq, |
77f02a7a | 1256 | .complete = nvme_pci_complete_rq, |
a4aea562 | 1257 | .init_hctx = nvme_admin_init_hctx, |
4af0e21c | 1258 | .exit_hctx = nvme_admin_exit_hctx, |
a4aea562 MB |
1259 | .init_request = nvme_admin_init_request, |
1260 | .timeout = nvme_timeout, | |
1261 | }; | |
1262 | ||
f363b089 | 1263 | static const struct blk_mq_ops nvme_mq_ops = { |
a4aea562 | 1264 | .queue_rq = nvme_queue_rq, |
77f02a7a | 1265 | .complete = nvme_pci_complete_rq, |
a4aea562 MB |
1266 | .init_hctx = nvme_init_hctx, |
1267 | .init_request = nvme_init_request, | |
dca51e78 | 1268 | .map_queues = nvme_pci_map_queues, |
a4aea562 | 1269 | .timeout = nvme_timeout, |
a0fa9647 | 1270 | .poll = nvme_poll, |
a4aea562 MB |
1271 | }; |
1272 | ||
ea191d2f KB |
1273 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
1274 | { | |
1c63dc66 | 1275 | if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { |
69d9a99c KB |
1276 | /* |
1277 | * If the controller was reset during removal, it's possible | |
1278 | * user requests may be waiting on a stopped queue. Start the | |
1279 | * queue to flush these to completion. | |
1280 | */ | |
1281 | blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); | |
1c63dc66 | 1282 | blk_cleanup_queue(dev->ctrl.admin_q); |
ea191d2f KB |
1283 | blk_mq_free_tag_set(&dev->admin_tagset); |
1284 | } | |
1285 | } | |
1286 | ||
a4aea562 MB |
1287 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
1288 | { | |
1c63dc66 | 1289 | if (!dev->ctrl.admin_q) { |
a4aea562 MB |
1290 | dev->admin_tagset.ops = &nvme_mq_admin_ops; |
1291 | dev->admin_tagset.nr_hw_queues = 1; | |
e3e9d50c KB |
1292 | |
1293 | /* | |
1294 | * Subtract one to leave an empty queue entry for 'Full Queue' | |
1295 | * condition. See NVM-Express 1.2 specification, section 4.1.2. | |
1296 | */ | |
1297 | dev->admin_tagset.queue_depth = NVME_AQ_BLKMQ_DEPTH - 1; | |
a4aea562 | 1298 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
e75ec752 | 1299 | dev->admin_tagset.numa_node = dev_to_node(dev->dev); |
ac3dd5bd | 1300 | dev->admin_tagset.cmd_size = nvme_cmd_size(dev); |
d3484991 | 1301 | dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED; |
a4aea562 MB |
1302 | dev->admin_tagset.driver_data = dev; |
1303 | ||
1304 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) | |
1305 | return -ENOMEM; | |
1306 | ||
1c63dc66 CH |
1307 | dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); |
1308 | if (IS_ERR(dev->ctrl.admin_q)) { | |
a4aea562 MB |
1309 | blk_mq_free_tag_set(&dev->admin_tagset); |
1310 | return -ENOMEM; | |
1311 | } | |
1c63dc66 | 1312 | if (!blk_get_queue(dev->ctrl.admin_q)) { |
ea191d2f | 1313 | nvme_dev_remove_admin(dev); |
1c63dc66 | 1314 | dev->ctrl.admin_q = NULL; |
ea191d2f KB |
1315 | return -ENODEV; |
1316 | } | |
0fb59cbc | 1317 | } else |
25646264 | 1318 | blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); |
a4aea562 MB |
1319 | |
1320 | return 0; | |
1321 | } | |
1322 | ||
8d85fce7 | 1323 | static int nvme_configure_admin_queue(struct nvme_dev *dev) |
b60503ba | 1324 | { |
ba47e386 | 1325 | int result; |
b60503ba | 1326 | u32 aqa; |
7a67cbea | 1327 | u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); |
b60503ba MW |
1328 | struct nvme_queue *nvmeq; |
1329 | ||
8ef2074d | 1330 | dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1, 0) ? |
dfbac8c7 KB |
1331 | NVME_CAP_NSSRC(cap) : 0; |
1332 | ||
7a67cbea CH |
1333 | if (dev->subsystem && |
1334 | (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) | |
1335 | writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); | |
dfbac8c7 | 1336 | |
5fd4ce1b | 1337 | result = nvme_disable_ctrl(&dev->ctrl, cap); |
ba47e386 MW |
1338 | if (result < 0) |
1339 | return result; | |
b60503ba | 1340 | |
a4aea562 | 1341 | nvmeq = dev->queues[0]; |
cd638946 | 1342 | if (!nvmeq) { |
d3af3ecd SL |
1343 | nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH, |
1344 | dev_to_node(dev->dev)); | |
cd638946 KB |
1345 | if (!nvmeq) |
1346 | return -ENOMEM; | |
cd638946 | 1347 | } |
b60503ba MW |
1348 | |
1349 | aqa = nvmeq->q_depth - 1; | |
1350 | aqa |= aqa << 16; | |
1351 | ||
7a67cbea CH |
1352 | writel(aqa, dev->bar + NVME_REG_AQA); |
1353 | lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); | |
1354 | lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); | |
b60503ba | 1355 | |
5fd4ce1b | 1356 | result = nvme_enable_ctrl(&dev->ctrl, cap); |
025c557a | 1357 | if (result) |
d4875622 | 1358 | return result; |
a4aea562 | 1359 | |
2b25d981 | 1360 | nvmeq->cq_vector = 0; |
dca51e78 | 1361 | result = queue_request_irq(nvmeq); |
758dd7fd JD |
1362 | if (result) { |
1363 | nvmeq->cq_vector = -1; | |
d4875622 | 1364 | return result; |
758dd7fd | 1365 | } |
025c557a | 1366 | |
b60503ba MW |
1367 | return result; |
1368 | } | |
1369 | ||
c875a709 GP |
1370 | static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) |
1371 | { | |
1372 | ||
1373 | /* If true, indicates loss of adapter communication, possibly by a | |
1374 | * NVMe Subsystem reset. | |
1375 | */ | |
1376 | bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO); | |
1377 | ||
1378 | /* If there is a reset ongoing, we shouldn't reset again. */ | |
82b057ca | 1379 | if (dev->ctrl.state == NVME_CTRL_RESETTING) |
c875a709 GP |
1380 | return false; |
1381 | ||
1382 | /* We shouldn't reset unless the controller is on fatal error state | |
1383 | * _or_ if we lost the communication with it. | |
1384 | */ | |
1385 | if (!(csts & NVME_CSTS_CFS) && !nssro) | |
1386 | return false; | |
1387 | ||
1388 | /* If PCI error recovery process is happening, we cannot reset or | |
1389 | * the recovery mechanism will surely fail. | |
1390 | */ | |
1391 | if (pci_channel_offline(to_pci_dev(dev->dev))) | |
1392 | return false; | |
1393 | ||
1394 | return true; | |
1395 | } | |
1396 | ||
d2a61918 AL |
1397 | static void nvme_warn_reset(struct nvme_dev *dev, u32 csts) |
1398 | { | |
1399 | /* Read a config register to help see what died. */ | |
1400 | u16 pci_status; | |
1401 | int result; | |
1402 | ||
1403 | result = pci_read_config_word(to_pci_dev(dev->dev), PCI_STATUS, | |
1404 | &pci_status); | |
1405 | if (result == PCIBIOS_SUCCESSFUL) | |
9bdcfb10 | 1406 | dev_warn(dev->ctrl.device, |
d2a61918 AL |
1407 | "controller is down; will reset: CSTS=0x%x, PCI_STATUS=0x%hx\n", |
1408 | csts, pci_status); | |
1409 | else | |
9bdcfb10 | 1410 | dev_warn(dev->ctrl.device, |
d2a61918 AL |
1411 | "controller is down; will reset: CSTS=0x%x, PCI_STATUS read failed (%d)\n", |
1412 | csts, result); | |
1413 | } | |
1414 | ||
2d55cd5f | 1415 | static void nvme_watchdog_timer(unsigned long data) |
1fa6aead | 1416 | { |
2d55cd5f CH |
1417 | struct nvme_dev *dev = (struct nvme_dev *)data; |
1418 | u32 csts = readl(dev->bar + NVME_REG_CSTS); | |
1fa6aead | 1419 | |
c875a709 GP |
1420 | /* Skip controllers under certain specific conditions. */ |
1421 | if (nvme_should_reset(dev, csts)) { | |
c5f6ce97 | 1422 | if (!nvme_reset(dev)) |
d2a61918 | 1423 | nvme_warn_reset(dev, csts); |
2d55cd5f | 1424 | return; |
1fa6aead | 1425 | } |
2d55cd5f CH |
1426 | |
1427 | mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + HZ)); | |
1fa6aead MW |
1428 | } |
1429 | ||
749941f2 | 1430 | static int nvme_create_io_queues(struct nvme_dev *dev) |
42f61420 | 1431 | { |
949928c1 | 1432 | unsigned i, max; |
749941f2 | 1433 | int ret = 0; |
42f61420 | 1434 | |
749941f2 | 1435 | for (i = dev->queue_count; i <= dev->max_qid; i++) { |
d3af3ecd SL |
1436 | /* vector == qid - 1, match nvme_create_queue */ |
1437 | if (!nvme_alloc_queue(dev, i, dev->q_depth, | |
1438 | pci_irq_get_node(to_pci_dev(dev->dev), i - 1))) { | |
749941f2 | 1439 | ret = -ENOMEM; |
42f61420 | 1440 | break; |
749941f2 CH |
1441 | } |
1442 | } | |
42f61420 | 1443 | |
949928c1 KB |
1444 | max = min(dev->max_qid, dev->queue_count - 1); |
1445 | for (i = dev->online_queues; i <= max; i++) { | |
749941f2 | 1446 | ret = nvme_create_queue(dev->queues[i], i); |
d4875622 | 1447 | if (ret) |
42f61420 | 1448 | break; |
27e8166c | 1449 | } |
749941f2 CH |
1450 | |
1451 | /* | |
1452 | * Ignore failing Create SQ/CQ commands, we can continue with less | |
1453 | * than the desired aount of queues, and even a controller without | |
1454 | * I/O queues an still be used to issue admin commands. This might | |
1455 | * be useful to upgrade a buggy firmware for example. | |
1456 | */ | |
1457 | return ret >= 0 ? 0 : ret; | |
b60503ba MW |
1458 | } |
1459 | ||
202021c1 SB |
1460 | static ssize_t nvme_cmb_show(struct device *dev, |
1461 | struct device_attribute *attr, | |
1462 | char *buf) | |
1463 | { | |
1464 | struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev)); | |
1465 | ||
c965809c | 1466 | return scnprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz : x%08x\n", |
202021c1 SB |
1467 | ndev->cmbloc, ndev->cmbsz); |
1468 | } | |
1469 | static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL); | |
1470 | ||
8ffaadf7 JD |
1471 | static void __iomem *nvme_map_cmb(struct nvme_dev *dev) |
1472 | { | |
1473 | u64 szu, size, offset; | |
8ffaadf7 JD |
1474 | resource_size_t bar_size; |
1475 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
1476 | void __iomem *cmb; | |
1477 | dma_addr_t dma_addr; | |
1478 | ||
7a67cbea | 1479 | dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); |
8ffaadf7 JD |
1480 | if (!(NVME_CMB_SZ(dev->cmbsz))) |
1481 | return NULL; | |
202021c1 | 1482 | dev->cmbloc = readl(dev->bar + NVME_REG_CMBLOC); |
8ffaadf7 | 1483 | |
202021c1 SB |
1484 | if (!use_cmb_sqes) |
1485 | return NULL; | |
8ffaadf7 JD |
1486 | |
1487 | szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); | |
1488 | size = szu * NVME_CMB_SZ(dev->cmbsz); | |
202021c1 SB |
1489 | offset = szu * NVME_CMB_OFST(dev->cmbloc); |
1490 | bar_size = pci_resource_len(pdev, NVME_CMB_BIR(dev->cmbloc)); | |
8ffaadf7 JD |
1491 | |
1492 | if (offset > bar_size) | |
1493 | return NULL; | |
1494 | ||
1495 | /* | |
1496 | * Controllers may support a CMB size larger than their BAR, | |
1497 | * for example, due to being behind a bridge. Reduce the CMB to | |
1498 | * the reported size of the BAR | |
1499 | */ | |
1500 | if (size > bar_size - offset) | |
1501 | size = bar_size - offset; | |
1502 | ||
202021c1 | 1503 | dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(dev->cmbloc)) + offset; |
8ffaadf7 JD |
1504 | cmb = ioremap_wc(dma_addr, size); |
1505 | if (!cmb) | |
1506 | return NULL; | |
1507 | ||
1508 | dev->cmb_dma_addr = dma_addr; | |
1509 | dev->cmb_size = size; | |
1510 | return cmb; | |
1511 | } | |
1512 | ||
1513 | static inline void nvme_release_cmb(struct nvme_dev *dev) | |
1514 | { | |
1515 | if (dev->cmb) { | |
1516 | iounmap(dev->cmb); | |
1517 | dev->cmb = NULL; | |
f63572df JD |
1518 | if (dev->cmbsz) { |
1519 | sysfs_remove_file_from_group(&dev->ctrl.device->kobj, | |
1520 | &dev_attr_cmb.attr, NULL); | |
1521 | dev->cmbsz = 0; | |
1522 | } | |
8ffaadf7 JD |
1523 | } |
1524 | } | |
1525 | ||
87ad72a5 CH |
1526 | static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits) |
1527 | { | |
1528 | size_t len = dev->nr_host_mem_descs * sizeof(*dev->host_mem_descs); | |
1529 | struct nvme_command c; | |
1530 | u64 dma_addr; | |
1531 | int ret; | |
1532 | ||
1533 | dma_addr = dma_map_single(dev->dev, dev->host_mem_descs, len, | |
1534 | DMA_TO_DEVICE); | |
1535 | if (dma_mapping_error(dev->dev, dma_addr)) | |
1536 | return -ENOMEM; | |
1537 | ||
1538 | memset(&c, 0, sizeof(c)); | |
1539 | c.features.opcode = nvme_admin_set_features; | |
1540 | c.features.fid = cpu_to_le32(NVME_FEAT_HOST_MEM_BUF); | |
1541 | c.features.dword11 = cpu_to_le32(bits); | |
1542 | c.features.dword12 = cpu_to_le32(dev->host_mem_size >> | |
1543 | ilog2(dev->ctrl.page_size)); | |
1544 | c.features.dword13 = cpu_to_le32(lower_32_bits(dma_addr)); | |
1545 | c.features.dword14 = cpu_to_le32(upper_32_bits(dma_addr)); | |
1546 | c.features.dword15 = cpu_to_le32(dev->nr_host_mem_descs); | |
1547 | ||
1548 | ret = nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); | |
1549 | if (ret) { | |
1550 | dev_warn(dev->ctrl.device, | |
1551 | "failed to set host mem (err %d, flags %#x).\n", | |
1552 | ret, bits); | |
1553 | } | |
1554 | dma_unmap_single(dev->dev, dma_addr, len, DMA_TO_DEVICE); | |
1555 | return ret; | |
1556 | } | |
1557 | ||
1558 | static void nvme_free_host_mem(struct nvme_dev *dev) | |
1559 | { | |
1560 | int i; | |
1561 | ||
1562 | for (i = 0; i < dev->nr_host_mem_descs; i++) { | |
1563 | struct nvme_host_mem_buf_desc *desc = &dev->host_mem_descs[i]; | |
1564 | size_t size = le32_to_cpu(desc->size) * dev->ctrl.page_size; | |
1565 | ||
1566 | dma_free_coherent(dev->dev, size, dev->host_mem_desc_bufs[i], | |
1567 | le64_to_cpu(desc->addr)); | |
1568 | } | |
1569 | ||
1570 | kfree(dev->host_mem_desc_bufs); | |
1571 | dev->host_mem_desc_bufs = NULL; | |
1572 | kfree(dev->host_mem_descs); | |
1573 | dev->host_mem_descs = NULL; | |
1574 | } | |
1575 | ||
1576 | static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred) | |
1577 | { | |
1578 | struct nvme_host_mem_buf_desc *descs; | |
1579 | u32 chunk_size, max_entries, i = 0; | |
1580 | void **bufs; | |
1581 | u64 size, tmp; | |
1582 | ||
1583 | /* start big and work our way down */ | |
1584 | chunk_size = min(preferred, (u64)PAGE_SIZE << MAX_ORDER); | |
1585 | retry: | |
1586 | tmp = (preferred + chunk_size - 1); | |
1587 | do_div(tmp, chunk_size); | |
1588 | max_entries = tmp; | |
1589 | descs = kcalloc(max_entries, sizeof(*descs), GFP_KERNEL); | |
1590 | if (!descs) | |
1591 | goto out; | |
1592 | ||
1593 | bufs = kcalloc(max_entries, sizeof(*bufs), GFP_KERNEL); | |
1594 | if (!bufs) | |
1595 | goto out_free_descs; | |
1596 | ||
1597 | for (size = 0; size < preferred; size += chunk_size) { | |
1598 | u32 len = min_t(u64, chunk_size, preferred - size); | |
1599 | dma_addr_t dma_addr; | |
1600 | ||
1601 | bufs[i] = dma_alloc_attrs(dev->dev, len, &dma_addr, GFP_KERNEL, | |
1602 | DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN); | |
1603 | if (!bufs[i]) | |
1604 | break; | |
1605 | ||
1606 | descs[i].addr = cpu_to_le64(dma_addr); | |
1607 | descs[i].size = cpu_to_le32(len / dev->ctrl.page_size); | |
1608 | i++; | |
1609 | } | |
1610 | ||
1611 | if (!size || (min && size < min)) { | |
1612 | dev_warn(dev->ctrl.device, | |
1613 | "failed to allocate host memory buffer.\n"); | |
1614 | goto out_free_bufs; | |
1615 | } | |
1616 | ||
1617 | dev_info(dev->ctrl.device, | |
1618 | "allocated %lld MiB host memory buffer.\n", | |
1619 | size >> ilog2(SZ_1M)); | |
1620 | dev->nr_host_mem_descs = i; | |
1621 | dev->host_mem_size = size; | |
1622 | dev->host_mem_descs = descs; | |
1623 | dev->host_mem_desc_bufs = bufs; | |
1624 | return 0; | |
1625 | ||
1626 | out_free_bufs: | |
1627 | while (--i >= 0) { | |
1628 | size_t size = le32_to_cpu(descs[i].size) * dev->ctrl.page_size; | |
1629 | ||
1630 | dma_free_coherent(dev->dev, size, bufs[i], | |
1631 | le64_to_cpu(descs[i].addr)); | |
1632 | } | |
1633 | ||
1634 | kfree(bufs); | |
1635 | out_free_descs: | |
1636 | kfree(descs); | |
1637 | out: | |
1638 | /* try a smaller chunk size if we failed early */ | |
1639 | if (chunk_size >= PAGE_SIZE * 2 && (i == 0 || size < min)) { | |
1640 | chunk_size /= 2; | |
1641 | goto retry; | |
1642 | } | |
1643 | dev->host_mem_descs = NULL; | |
1644 | return -ENOMEM; | |
1645 | } | |
1646 | ||
1647 | static void nvme_setup_host_mem(struct nvme_dev *dev) | |
1648 | { | |
1649 | u64 max = (u64)max_host_mem_size_mb * SZ_1M; | |
1650 | u64 preferred = (u64)dev->ctrl.hmpre * 4096; | |
1651 | u64 min = (u64)dev->ctrl.hmmin * 4096; | |
1652 | u32 enable_bits = NVME_HOST_MEM_ENABLE; | |
1653 | ||
1654 | preferred = min(preferred, max); | |
1655 | if (min > max) { | |
1656 | dev_warn(dev->ctrl.device, | |
1657 | "min host memory (%lld MiB) above limit (%d MiB).\n", | |
1658 | min >> ilog2(SZ_1M), max_host_mem_size_mb); | |
1659 | nvme_free_host_mem(dev); | |
1660 | return; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * If we already have a buffer allocated check if we can reuse it. | |
1665 | */ | |
1666 | if (dev->host_mem_descs) { | |
1667 | if (dev->host_mem_size >= min) | |
1668 | enable_bits |= NVME_HOST_MEM_RETURN; | |
1669 | else | |
1670 | nvme_free_host_mem(dev); | |
1671 | } | |
1672 | ||
1673 | if (!dev->host_mem_descs) { | |
1674 | if (nvme_alloc_host_mem(dev, min, preferred)) | |
1675 | return; | |
1676 | } | |
1677 | ||
1678 | if (nvme_set_host_mem(dev, enable_bits)) | |
1679 | nvme_free_host_mem(dev); | |
1680 | } | |
1681 | ||
9d713c2b KB |
1682 | static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
1683 | { | |
b80d5ccc | 1684 | return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); |
9d713c2b KB |
1685 | } |
1686 | ||
8d85fce7 | 1687 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
b60503ba | 1688 | { |
a4aea562 | 1689 | struct nvme_queue *adminq = dev->queues[0]; |
e75ec752 | 1690 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
dca51e78 | 1691 | int result, nr_io_queues, size; |
b60503ba | 1692 | |
2800b8e7 | 1693 | nr_io_queues = num_online_cpus(); |
9a0be7ab CH |
1694 | result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); |
1695 | if (result < 0) | |
1b23484b | 1696 | return result; |
9a0be7ab | 1697 | |
f5fa90dc | 1698 | if (nr_io_queues == 0) |
a5229050 | 1699 | return 0; |
b60503ba | 1700 | |
8ffaadf7 JD |
1701 | if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { |
1702 | result = nvme_cmb_qdepth(dev, nr_io_queues, | |
1703 | sizeof(struct nvme_command)); | |
1704 | if (result > 0) | |
1705 | dev->q_depth = result; | |
1706 | else | |
1707 | nvme_release_cmb(dev); | |
1708 | } | |
1709 | ||
9d713c2b KB |
1710 | size = db_bar_size(dev, nr_io_queues); |
1711 | if (size > 8192) { | |
f1938f6e | 1712 | iounmap(dev->bar); |
9d713c2b KB |
1713 | do { |
1714 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); | |
1715 | if (dev->bar) | |
1716 | break; | |
1717 | if (!--nr_io_queues) | |
1718 | return -ENOMEM; | |
1719 | size = db_bar_size(dev, nr_io_queues); | |
1720 | } while (1); | |
7a67cbea | 1721 | dev->dbs = dev->bar + 4096; |
5a92e700 | 1722 | adminq->q_db = dev->dbs; |
f1938f6e MW |
1723 | } |
1724 | ||
9d713c2b | 1725 | /* Deregister the admin queue's interrupt */ |
0ff199cb | 1726 | pci_free_irq(pdev, 0, adminq); |
9d713c2b | 1727 | |
e32efbfc JA |
1728 | /* |
1729 | * If we enable msix early due to not intx, disable it again before | |
1730 | * setting up the full range we need. | |
1731 | */ | |
dca51e78 CH |
1732 | pci_free_irq_vectors(pdev); |
1733 | nr_io_queues = pci_alloc_irq_vectors(pdev, 1, nr_io_queues, | |
1734 | PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY); | |
1735 | if (nr_io_queues <= 0) | |
1736 | return -EIO; | |
1737 | dev->max_qid = nr_io_queues; | |
fa08a396 | 1738 | |
063a8096 MW |
1739 | /* |
1740 | * Should investigate if there's a performance win from allocating | |
1741 | * more queues than interrupt vectors; it might allow the submission | |
1742 | * path to scale better, even if the receive path is limited by the | |
1743 | * number of interrupts. | |
1744 | */ | |
063a8096 | 1745 | |
dca51e78 | 1746 | result = queue_request_irq(adminq); |
758dd7fd JD |
1747 | if (result) { |
1748 | adminq->cq_vector = -1; | |
d4875622 | 1749 | return result; |
758dd7fd | 1750 | } |
749941f2 | 1751 | return nvme_create_io_queues(dev); |
b60503ba MW |
1752 | } |
1753 | ||
2a842aca | 1754 | static void nvme_del_queue_end(struct request *req, blk_status_t error) |
a5768aa8 | 1755 | { |
db3cbfff | 1756 | struct nvme_queue *nvmeq = req->end_io_data; |
b5875222 | 1757 | |
db3cbfff KB |
1758 | blk_mq_free_request(req); |
1759 | complete(&nvmeq->dev->ioq_wait); | |
a5768aa8 KB |
1760 | } |
1761 | ||
2a842aca | 1762 | static void nvme_del_cq_end(struct request *req, blk_status_t error) |
a5768aa8 | 1763 | { |
db3cbfff | 1764 | struct nvme_queue *nvmeq = req->end_io_data; |
a5768aa8 | 1765 | |
db3cbfff KB |
1766 | if (!error) { |
1767 | unsigned long flags; | |
1768 | ||
2e39e0f6 ML |
1769 | /* |
1770 | * We might be called with the AQ q_lock held | |
1771 | * and the I/O queue q_lock should always | |
1772 | * nest inside the AQ one. | |
1773 | */ | |
1774 | spin_lock_irqsave_nested(&nvmeq->q_lock, flags, | |
1775 | SINGLE_DEPTH_NESTING); | |
db3cbfff KB |
1776 | nvme_process_cq(nvmeq); |
1777 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); | |
a5768aa8 | 1778 | } |
db3cbfff KB |
1779 | |
1780 | nvme_del_queue_end(req, error); | |
a5768aa8 KB |
1781 | } |
1782 | ||
db3cbfff | 1783 | static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) |
bda4e0fb | 1784 | { |
db3cbfff KB |
1785 | struct request_queue *q = nvmeq->dev->ctrl.admin_q; |
1786 | struct request *req; | |
1787 | struct nvme_command cmd; | |
bda4e0fb | 1788 | |
db3cbfff KB |
1789 | memset(&cmd, 0, sizeof(cmd)); |
1790 | cmd.delete_queue.opcode = opcode; | |
1791 | cmd.delete_queue.qid = cpu_to_le16(nvmeq->qid); | |
bda4e0fb | 1792 | |
eb71f435 | 1793 | req = nvme_alloc_request(q, &cmd, BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
db3cbfff KB |
1794 | if (IS_ERR(req)) |
1795 | return PTR_ERR(req); | |
bda4e0fb | 1796 | |
db3cbfff KB |
1797 | req->timeout = ADMIN_TIMEOUT; |
1798 | req->end_io_data = nvmeq; | |
1799 | ||
1800 | blk_execute_rq_nowait(q, NULL, req, false, | |
1801 | opcode == nvme_admin_delete_cq ? | |
1802 | nvme_del_cq_end : nvme_del_queue_end); | |
1803 | return 0; | |
bda4e0fb KB |
1804 | } |
1805 | ||
70659060 | 1806 | static void nvme_disable_io_queues(struct nvme_dev *dev, int queues) |
a5768aa8 | 1807 | { |
70659060 | 1808 | int pass; |
db3cbfff KB |
1809 | unsigned long timeout; |
1810 | u8 opcode = nvme_admin_delete_sq; | |
a5768aa8 | 1811 | |
db3cbfff | 1812 | for (pass = 0; pass < 2; pass++) { |
014a0d60 | 1813 | int sent = 0, i = queues; |
db3cbfff KB |
1814 | |
1815 | reinit_completion(&dev->ioq_wait); | |
1816 | retry: | |
1817 | timeout = ADMIN_TIMEOUT; | |
c21377f8 GKB |
1818 | for (; i > 0; i--, sent++) |
1819 | if (nvme_delete_queue(dev->queues[i], opcode)) | |
db3cbfff | 1820 | break; |
c21377f8 | 1821 | |
db3cbfff KB |
1822 | while (sent--) { |
1823 | timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); | |
1824 | if (timeout == 0) | |
1825 | return; | |
1826 | if (i) | |
1827 | goto retry; | |
1828 | } | |
1829 | opcode = nvme_admin_delete_cq; | |
1830 | } | |
a5768aa8 KB |
1831 | } |
1832 | ||
422ef0c7 MW |
1833 | /* |
1834 | * Return: error value if an error occurred setting up the queues or calling | |
1835 | * Identify Device. 0 if these succeeded, even if adding some of the | |
1836 | * namespaces failed. At the moment, these failures are silent. TBD which | |
1837 | * failures should be reported. | |
1838 | */ | |
8d85fce7 | 1839 | static int nvme_dev_add(struct nvme_dev *dev) |
b60503ba | 1840 | { |
5bae7f73 | 1841 | if (!dev->ctrl.tagset) { |
ffe7704d KB |
1842 | dev->tagset.ops = &nvme_mq_ops; |
1843 | dev->tagset.nr_hw_queues = dev->online_queues - 1; | |
1844 | dev->tagset.timeout = NVME_IO_TIMEOUT; | |
1845 | dev->tagset.numa_node = dev_to_node(dev->dev); | |
1846 | dev->tagset.queue_depth = | |
a4aea562 | 1847 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; |
ffe7704d KB |
1848 | dev->tagset.cmd_size = nvme_cmd_size(dev); |
1849 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; | |
1850 | dev->tagset.driver_data = dev; | |
b60503ba | 1851 | |
ffe7704d KB |
1852 | if (blk_mq_alloc_tag_set(&dev->tagset)) |
1853 | return 0; | |
5bae7f73 | 1854 | dev->ctrl.tagset = &dev->tagset; |
f9f38e33 HK |
1855 | |
1856 | nvme_dbbuf_set(dev); | |
949928c1 KB |
1857 | } else { |
1858 | blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1); | |
1859 | ||
1860 | /* Free previously allocated queues that are no longer usable */ | |
1861 | nvme_free_queues(dev, dev->online_queues); | |
ffe7704d | 1862 | } |
949928c1 | 1863 | |
e1e5e564 | 1864 | return 0; |
b60503ba MW |
1865 | } |
1866 | ||
b00a726a | 1867 | static int nvme_pci_enable(struct nvme_dev *dev) |
0877cb0d | 1868 | { |
42f61420 | 1869 | u64 cap; |
b00a726a | 1870 | int result = -ENOMEM; |
e75ec752 | 1871 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
0877cb0d KB |
1872 | |
1873 | if (pci_enable_device_mem(pdev)) | |
1874 | return result; | |
1875 | ||
0877cb0d | 1876 | pci_set_master(pdev); |
0877cb0d | 1877 | |
e75ec752 CH |
1878 | if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && |
1879 | dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) | |
052d0efa | 1880 | goto disable; |
0877cb0d | 1881 | |
7a67cbea | 1882 | if (readl(dev->bar + NVME_REG_CSTS) == -1) { |
0e53d180 | 1883 | result = -ENODEV; |
b00a726a | 1884 | goto disable; |
0e53d180 | 1885 | } |
e32efbfc JA |
1886 | |
1887 | /* | |
a5229050 KB |
1888 | * Some devices and/or platforms don't advertise or work with INTx |
1889 | * interrupts. Pre-enable a single MSIX or MSI vec for setup. We'll | |
1890 | * adjust this later. | |
e32efbfc | 1891 | */ |
dca51e78 CH |
1892 | result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); |
1893 | if (result < 0) | |
1894 | return result; | |
e32efbfc | 1895 | |
7a67cbea CH |
1896 | cap = lo_hi_readq(dev->bar + NVME_REG_CAP); |
1897 | ||
42f61420 KB |
1898 | dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); |
1899 | dev->db_stride = 1 << NVME_CAP_STRIDE(cap); | |
7a67cbea | 1900 | dev->dbs = dev->bar + 4096; |
1f390c1f SG |
1901 | |
1902 | /* | |
1903 | * Temporary fix for the Apple controller found in the MacBook8,1 and | |
1904 | * some MacBook7,1 to avoid controller resets and data loss. | |
1905 | */ | |
1906 | if (pdev->vendor == PCI_VENDOR_ID_APPLE && pdev->device == 0x2001) { | |
1907 | dev->q_depth = 2; | |
9bdcfb10 CH |
1908 | dev_warn(dev->ctrl.device, "detected Apple NVMe controller, " |
1909 | "set queue depth=%u to work around controller resets\n", | |
1f390c1f SG |
1910 | dev->q_depth); |
1911 | } | |
1912 | ||
202021c1 SB |
1913 | /* |
1914 | * CMBs can currently only exist on >=1.2 PCIe devices. We only | |
1915 | * populate sysfs if a CMB is implemented. Note that we add the | |
1916 | * CMB attribute to the nvme_ctrl kobj which removes the need to remove | |
1917 | * it on exit. Since nvme_dev_attrs_group has no name we can pass | |
1918 | * NULL as final argument to sysfs_add_file_to_group. | |
1919 | */ | |
1920 | ||
8ef2074d | 1921 | if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2, 0)) { |
8ffaadf7 | 1922 | dev->cmb = nvme_map_cmb(dev); |
0877cb0d | 1923 | |
202021c1 SB |
1924 | if (dev->cmbsz) { |
1925 | if (sysfs_add_file_to_group(&dev->ctrl.device->kobj, | |
1926 | &dev_attr_cmb.attr, NULL)) | |
9bdcfb10 | 1927 | dev_warn(dev->ctrl.device, |
202021c1 SB |
1928 | "failed to add sysfs attribute for CMB\n"); |
1929 | } | |
1930 | } | |
1931 | ||
a0a3408e KB |
1932 | pci_enable_pcie_error_reporting(pdev); |
1933 | pci_save_state(pdev); | |
0877cb0d KB |
1934 | return 0; |
1935 | ||
1936 | disable: | |
0877cb0d KB |
1937 | pci_disable_device(pdev); |
1938 | return result; | |
1939 | } | |
1940 | ||
1941 | static void nvme_dev_unmap(struct nvme_dev *dev) | |
b00a726a KB |
1942 | { |
1943 | if (dev->bar) | |
1944 | iounmap(dev->bar); | |
a1f447b3 | 1945 | pci_release_mem_regions(to_pci_dev(dev->dev)); |
b00a726a KB |
1946 | } |
1947 | ||
1948 | static void nvme_pci_disable(struct nvme_dev *dev) | |
0877cb0d | 1949 | { |
e75ec752 CH |
1950 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
1951 | ||
f63572df | 1952 | nvme_release_cmb(dev); |
dca51e78 | 1953 | pci_free_irq_vectors(pdev); |
0877cb0d | 1954 | |
a0a3408e KB |
1955 | if (pci_is_enabled(pdev)) { |
1956 | pci_disable_pcie_error_reporting(pdev); | |
e75ec752 | 1957 | pci_disable_device(pdev); |
4d115420 | 1958 | } |
4d115420 KB |
1959 | } |
1960 | ||
a5cdb68c | 1961 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) |
b60503ba | 1962 | { |
70659060 | 1963 | int i, queues; |
302ad8cc KB |
1964 | bool dead = true; |
1965 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
22404274 | 1966 | |
2d55cd5f | 1967 | del_timer_sync(&dev->watchdog_timer); |
1fa6aead | 1968 | |
77bf25ea | 1969 | mutex_lock(&dev->shutdown_lock); |
302ad8cc KB |
1970 | if (pci_is_enabled(pdev)) { |
1971 | u32 csts = readl(dev->bar + NVME_REG_CSTS); | |
1972 | ||
1973 | if (dev->ctrl.state == NVME_CTRL_LIVE) | |
1974 | nvme_start_freeze(&dev->ctrl); | |
1975 | dead = !!((csts & NVME_CSTS_CFS) || !(csts & NVME_CSTS_RDY) || | |
1976 | pdev->error_state != pci_channel_io_normal); | |
c9d3bf88 | 1977 | } |
c21377f8 | 1978 | |
302ad8cc KB |
1979 | /* |
1980 | * Give the controller a chance to complete all entered requests if | |
1981 | * doing a safe shutdown. | |
1982 | */ | |
87ad72a5 CH |
1983 | if (!dead) { |
1984 | if (shutdown) | |
1985 | nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT); | |
1986 | ||
1987 | /* | |
1988 | * If the controller is still alive tell it to stop using the | |
1989 | * host memory buffer. In theory the shutdown / reset should | |
1990 | * make sure that it doesn't access the host memoery anymore, | |
1991 | * but I'd rather be safe than sorry.. | |
1992 | */ | |
1993 | if (dev->host_mem_descs) | |
1994 | nvme_set_host_mem(dev, 0); | |
1995 | ||
1996 | } | |
302ad8cc KB |
1997 | nvme_stop_queues(&dev->ctrl); |
1998 | ||
70659060 | 1999 | queues = dev->online_queues - 1; |
c21377f8 GKB |
2000 | for (i = dev->queue_count - 1; i > 0; i--) |
2001 | nvme_suspend_queue(dev->queues[i]); | |
2002 | ||
302ad8cc | 2003 | if (dead) { |
82469c59 GKB |
2004 | /* A device might become IO incapable very soon during |
2005 | * probe, before the admin queue is configured. Thus, | |
2006 | * queue_count can be 0 here. | |
2007 | */ | |
2008 | if (dev->queue_count) | |
2009 | nvme_suspend_queue(dev->queues[0]); | |
4d115420 | 2010 | } else { |
70659060 | 2011 | nvme_disable_io_queues(dev, queues); |
a5cdb68c | 2012 | nvme_disable_admin_queue(dev, shutdown); |
4d115420 | 2013 | } |
b00a726a | 2014 | nvme_pci_disable(dev); |
07836e65 | 2015 | |
e1958e65 ML |
2016 | blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); |
2017 | blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); | |
302ad8cc KB |
2018 | |
2019 | /* | |
2020 | * The driver will not be starting up queues again if shutting down so | |
2021 | * must flush all entered requests to their failed completion to avoid | |
2022 | * deadlocking blk-mq hot-cpu notifier. | |
2023 | */ | |
2024 | if (shutdown) | |
2025 | nvme_start_queues(&dev->ctrl); | |
77bf25ea | 2026 | mutex_unlock(&dev->shutdown_lock); |
b60503ba MW |
2027 | } |
2028 | ||
091b6092 MW |
2029 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
2030 | { | |
e75ec752 | 2031 | dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, |
091b6092 MW |
2032 | PAGE_SIZE, PAGE_SIZE, 0); |
2033 | if (!dev->prp_page_pool) | |
2034 | return -ENOMEM; | |
2035 | ||
99802a7a | 2036 | /* Optimisation for I/Os between 4k and 128k */ |
e75ec752 | 2037 | dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, |
99802a7a MW |
2038 | 256, 256, 0); |
2039 | if (!dev->prp_small_pool) { | |
2040 | dma_pool_destroy(dev->prp_page_pool); | |
2041 | return -ENOMEM; | |
2042 | } | |
091b6092 MW |
2043 | return 0; |
2044 | } | |
2045 | ||
2046 | static void nvme_release_prp_pools(struct nvme_dev *dev) | |
2047 | { | |
2048 | dma_pool_destroy(dev->prp_page_pool); | |
99802a7a | 2049 | dma_pool_destroy(dev->prp_small_pool); |
091b6092 MW |
2050 | } |
2051 | ||
1673f1f0 | 2052 | static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) |
5e82e952 | 2053 | { |
1673f1f0 | 2054 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
9ac27090 | 2055 | |
f9f38e33 | 2056 | nvme_dbbuf_dma_free(dev); |
e75ec752 | 2057 | put_device(dev->dev); |
4af0e21c KB |
2058 | if (dev->tagset.tags) |
2059 | blk_mq_free_tag_set(&dev->tagset); | |
1c63dc66 CH |
2060 | if (dev->ctrl.admin_q) |
2061 | blk_put_queue(dev->ctrl.admin_q); | |
5e82e952 | 2062 | kfree(dev->queues); |
e286bcfc | 2063 | free_opal_dev(dev->ctrl.opal_dev); |
5e82e952 KB |
2064 | kfree(dev); |
2065 | } | |
2066 | ||
f58944e2 KB |
2067 | static void nvme_remove_dead_ctrl(struct nvme_dev *dev, int status) |
2068 | { | |
237045fc | 2069 | dev_warn(dev->ctrl.device, "Removing after probe failure status: %d\n", status); |
f58944e2 KB |
2070 | |
2071 | kref_get(&dev->ctrl.kref); | |
69d9a99c | 2072 | nvme_dev_disable(dev, false); |
f58944e2 KB |
2073 | if (!schedule_work(&dev->remove_work)) |
2074 | nvme_put_ctrl(&dev->ctrl); | |
2075 | } | |
2076 | ||
fd634f41 | 2077 | static void nvme_reset_work(struct work_struct *work) |
5e82e952 | 2078 | { |
fd634f41 | 2079 | struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); |
a98e58e5 | 2080 | bool was_suspend = !!(dev->ctrl.ctrl_config & NVME_CC_SHN_NORMAL); |
f58944e2 | 2081 | int result = -ENODEV; |
5e82e952 | 2082 | |
82b057ca | 2083 | if (WARN_ON(dev->ctrl.state != NVME_CTRL_RESETTING)) |
fd634f41 | 2084 | goto out; |
5e82e952 | 2085 | |
fd634f41 CH |
2086 | /* |
2087 | * If we're called to reset a live controller first shut it down before | |
2088 | * moving on. | |
2089 | */ | |
b00a726a | 2090 | if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) |
a5cdb68c | 2091 | nvme_dev_disable(dev, false); |
5e82e952 | 2092 | |
b00a726a | 2093 | result = nvme_pci_enable(dev); |
f0b50732 | 2094 | if (result) |
3cf519b5 | 2095 | goto out; |
f0b50732 KB |
2096 | |
2097 | result = nvme_configure_admin_queue(dev); | |
2098 | if (result) | |
f58944e2 | 2099 | goto out; |
f0b50732 | 2100 | |
a4aea562 | 2101 | nvme_init_queue(dev->queues[0], 0); |
0fb59cbc KB |
2102 | result = nvme_alloc_admin_tags(dev); |
2103 | if (result) | |
f58944e2 | 2104 | goto out; |
b9afca3e | 2105 | |
ce4541f4 CH |
2106 | result = nvme_init_identify(&dev->ctrl); |
2107 | if (result) | |
f58944e2 | 2108 | goto out; |
ce4541f4 | 2109 | |
e286bcfc SB |
2110 | if (dev->ctrl.oacs & NVME_CTRL_OACS_SEC_SUPP) { |
2111 | if (!dev->ctrl.opal_dev) | |
2112 | dev->ctrl.opal_dev = | |
2113 | init_opal_dev(&dev->ctrl, &nvme_sec_submit); | |
2114 | else if (was_suspend) | |
2115 | opal_unlock_from_suspend(dev->ctrl.opal_dev); | |
2116 | } else { | |
2117 | free_opal_dev(dev->ctrl.opal_dev); | |
2118 | dev->ctrl.opal_dev = NULL; | |
4f1244c8 | 2119 | } |
a98e58e5 | 2120 | |
f9f38e33 HK |
2121 | if (dev->ctrl.oacs & NVME_CTRL_OACS_DBBUF_SUPP) { |
2122 | result = nvme_dbbuf_dma_alloc(dev); | |
2123 | if (result) | |
2124 | dev_warn(dev->dev, | |
2125 | "unable to allocate dma for dbbuf\n"); | |
2126 | } | |
2127 | ||
87ad72a5 CH |
2128 | if (dev->ctrl.hmpre) |
2129 | nvme_setup_host_mem(dev); | |
2130 | ||
f0b50732 | 2131 | result = nvme_setup_io_queues(dev); |
badc34d4 | 2132 | if (result) |
f58944e2 | 2133 | goto out; |
f0b50732 | 2134 | |
21f033f7 KB |
2135 | /* |
2136 | * A controller that can not execute IO typically requires user | |
2137 | * intervention to correct. For such degraded controllers, the driver | |
2138 | * should not submit commands the user did not request, so skip | |
2139 | * registering for asynchronous event notification on this condition. | |
2140 | */ | |
f866fc42 CH |
2141 | if (dev->online_queues > 1) |
2142 | nvme_queue_async_events(&dev->ctrl); | |
3cf519b5 | 2143 | |
2d55cd5f | 2144 | mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + HZ)); |
3cf519b5 | 2145 | |
2659e57b CH |
2146 | /* |
2147 | * Keep the controller around but remove all namespaces if we don't have | |
2148 | * any working I/O queue. | |
2149 | */ | |
3cf519b5 | 2150 | if (dev->online_queues < 2) { |
1b3c47c1 | 2151 | dev_warn(dev->ctrl.device, "IO queues not created\n"); |
3b24774e | 2152 | nvme_kill_queues(&dev->ctrl); |
5bae7f73 | 2153 | nvme_remove_namespaces(&dev->ctrl); |
3cf519b5 | 2154 | } else { |
25646264 | 2155 | nvme_start_queues(&dev->ctrl); |
302ad8cc | 2156 | nvme_wait_freeze(&dev->ctrl); |
3cf519b5 | 2157 | nvme_dev_add(dev); |
302ad8cc | 2158 | nvme_unfreeze(&dev->ctrl); |
3cf519b5 CH |
2159 | } |
2160 | ||
bb8d261e CH |
2161 | if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_LIVE)) { |
2162 | dev_warn(dev->ctrl.device, "failed to mark controller live\n"); | |
2163 | goto out; | |
2164 | } | |
92911a55 CH |
2165 | |
2166 | if (dev->online_queues > 1) | |
5955be21 | 2167 | nvme_queue_scan(&dev->ctrl); |
3cf519b5 | 2168 | return; |
f0b50732 | 2169 | |
3cf519b5 | 2170 | out: |
f58944e2 | 2171 | nvme_remove_dead_ctrl(dev, result); |
f0b50732 KB |
2172 | } |
2173 | ||
5c8809e6 | 2174 | static void nvme_remove_dead_ctrl_work(struct work_struct *work) |
9a6b9458 | 2175 | { |
5c8809e6 | 2176 | struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); |
e75ec752 | 2177 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
9a6b9458 | 2178 | |
69d9a99c | 2179 | nvme_kill_queues(&dev->ctrl); |
9a6b9458 | 2180 | if (pci_get_drvdata(pdev)) |
921920ab | 2181 | device_release_driver(&pdev->dev); |
1673f1f0 | 2182 | nvme_put_ctrl(&dev->ctrl); |
9a6b9458 KB |
2183 | } |
2184 | ||
4cc06521 | 2185 | static int nvme_reset(struct nvme_dev *dev) |
9a6b9458 | 2186 | { |
1c63dc66 | 2187 | if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q)) |
4cc06521 | 2188 | return -ENODEV; |
82b057ca RP |
2189 | if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING)) |
2190 | return -EBUSY; | |
9a6327d2 | 2191 | if (!queue_work(nvme_wq, &dev->reset_work)) |
846cc05f | 2192 | return -EBUSY; |
846cc05f | 2193 | return 0; |
9a6b9458 KB |
2194 | } |
2195 | ||
1c63dc66 | 2196 | static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) |
9ca97374 | 2197 | { |
1c63dc66 | 2198 | *val = readl(to_nvme_dev(ctrl)->bar + off); |
90667892 | 2199 | return 0; |
9ca97374 TH |
2200 | } |
2201 | ||
5fd4ce1b | 2202 | static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) |
4cc06521 | 2203 | { |
5fd4ce1b CH |
2204 | writel(val, to_nvme_dev(ctrl)->bar + off); |
2205 | return 0; | |
2206 | } | |
4cc06521 | 2207 | |
7fd8930f CH |
2208 | static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) |
2209 | { | |
2210 | *val = readq(to_nvme_dev(ctrl)->bar + off); | |
2211 | return 0; | |
4cc06521 KB |
2212 | } |
2213 | ||
f3ca80fc CH |
2214 | static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl) |
2215 | { | |
c5f6ce97 KB |
2216 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
2217 | int ret = nvme_reset(dev); | |
2218 | ||
2219 | if (!ret) | |
2220 | flush_work(&dev->reset_work); | |
2221 | return ret; | |
4cc06521 | 2222 | } |
f3ca80fc | 2223 | |
1c63dc66 | 2224 | static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { |
1a353d85 | 2225 | .name = "pcie", |
e439bb12 | 2226 | .module = THIS_MODULE, |
c81bfba9 | 2227 | .flags = NVME_F_METADATA_SUPPORTED, |
1c63dc66 | 2228 | .reg_read32 = nvme_pci_reg_read32, |
5fd4ce1b | 2229 | .reg_write32 = nvme_pci_reg_write32, |
7fd8930f | 2230 | .reg_read64 = nvme_pci_reg_read64, |
f3ca80fc | 2231 | .reset_ctrl = nvme_pci_reset_ctrl, |
1673f1f0 | 2232 | .free_ctrl = nvme_pci_free_ctrl, |
f866fc42 | 2233 | .submit_async_event = nvme_pci_submit_async_event, |
1c63dc66 | 2234 | }; |
4cc06521 | 2235 | |
b00a726a KB |
2236 | static int nvme_dev_map(struct nvme_dev *dev) |
2237 | { | |
b00a726a KB |
2238 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
2239 | ||
a1f447b3 | 2240 | if (pci_request_mem_regions(pdev, "nvme")) |
b00a726a KB |
2241 | return -ENODEV; |
2242 | ||
2243 | dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); | |
2244 | if (!dev->bar) | |
2245 | goto release; | |
2246 | ||
9fa196e7 | 2247 | return 0; |
b00a726a | 2248 | release: |
9fa196e7 MG |
2249 | pci_release_mem_regions(pdev); |
2250 | return -ENODEV; | |
b00a726a KB |
2251 | } |
2252 | ||
ff5350a8 AL |
2253 | static unsigned long check_dell_samsung_bug(struct pci_dev *pdev) |
2254 | { | |
2255 | if (pdev->vendor == 0x144d && pdev->device == 0xa802) { | |
2256 | /* | |
2257 | * Several Samsung devices seem to drop off the PCIe bus | |
2258 | * randomly when APST is on and uses the deepest sleep state. | |
2259 | * This has been observed on a Samsung "SM951 NVMe SAMSUNG | |
2260 | * 256GB", a "PM951 NVMe SAMSUNG 512GB", and a "Samsung SSD | |
2261 | * 950 PRO 256GB", but it seems to be restricted to two Dell | |
2262 | * laptops. | |
2263 | */ | |
2264 | if (dmi_match(DMI_SYS_VENDOR, "Dell Inc.") && | |
2265 | (dmi_match(DMI_PRODUCT_NAME, "XPS 15 9550") || | |
2266 | dmi_match(DMI_PRODUCT_NAME, "Precision 5510"))) | |
2267 | return NVME_QUIRK_NO_DEEPEST_PS; | |
2268 | } | |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
8d85fce7 | 2273 | static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
b60503ba | 2274 | { |
a4aea562 | 2275 | int node, result = -ENOMEM; |
b60503ba | 2276 | struct nvme_dev *dev; |
ff5350a8 | 2277 | unsigned long quirks = id->driver_data; |
b60503ba | 2278 | |
a4aea562 MB |
2279 | node = dev_to_node(&pdev->dev); |
2280 | if (node == NUMA_NO_NODE) | |
2fa84351 | 2281 | set_dev_node(&pdev->dev, first_memory_node); |
a4aea562 MB |
2282 | |
2283 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); | |
b60503ba MW |
2284 | if (!dev) |
2285 | return -ENOMEM; | |
a4aea562 MB |
2286 | dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), |
2287 | GFP_KERNEL, node); | |
b60503ba MW |
2288 | if (!dev->queues) |
2289 | goto free; | |
2290 | ||
e75ec752 | 2291 | dev->dev = get_device(&pdev->dev); |
9a6b9458 | 2292 | pci_set_drvdata(pdev, dev); |
1c63dc66 | 2293 | |
b00a726a KB |
2294 | result = nvme_dev_map(dev); |
2295 | if (result) | |
2296 | goto free; | |
2297 | ||
f3ca80fc | 2298 | INIT_WORK(&dev->reset_work, nvme_reset_work); |
5c8809e6 | 2299 | INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); |
2d55cd5f CH |
2300 | setup_timer(&dev->watchdog_timer, nvme_watchdog_timer, |
2301 | (unsigned long)dev); | |
77bf25ea | 2302 | mutex_init(&dev->shutdown_lock); |
db3cbfff | 2303 | init_completion(&dev->ioq_wait); |
b60503ba | 2304 | |
091b6092 MW |
2305 | result = nvme_setup_prp_pools(dev); |
2306 | if (result) | |
a96d4f5c | 2307 | goto put_pci; |
4cc06521 | 2308 | |
ff5350a8 AL |
2309 | quirks |= check_dell_samsung_bug(pdev); |
2310 | ||
f3ca80fc | 2311 | result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, |
ff5350a8 | 2312 | quirks); |
4cc06521 | 2313 | if (result) |
2e1d8448 | 2314 | goto release_pools; |
740216fc | 2315 | |
82b057ca | 2316 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING); |
1b3c47c1 SG |
2317 | dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev)); |
2318 | ||
9a6327d2 | 2319 | queue_work(nvme_wq, &dev->reset_work); |
b60503ba MW |
2320 | return 0; |
2321 | ||
0877cb0d | 2322 | release_pools: |
091b6092 | 2323 | nvme_release_prp_pools(dev); |
a96d4f5c | 2324 | put_pci: |
e75ec752 | 2325 | put_device(dev->dev); |
b00a726a | 2326 | nvme_dev_unmap(dev); |
b60503ba MW |
2327 | free: |
2328 | kfree(dev->queues); | |
b60503ba MW |
2329 | kfree(dev); |
2330 | return result; | |
2331 | } | |
2332 | ||
f0d54a54 KB |
2333 | static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) |
2334 | { | |
a6739479 | 2335 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
f0d54a54 | 2336 | |
a6739479 | 2337 | if (prepare) |
a5cdb68c | 2338 | nvme_dev_disable(dev, false); |
a6739479 | 2339 | else |
c5f6ce97 | 2340 | nvme_reset(dev); |
f0d54a54 KB |
2341 | } |
2342 | ||
09ece142 KB |
2343 | static void nvme_shutdown(struct pci_dev *pdev) |
2344 | { | |
2345 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
a5cdb68c | 2346 | nvme_dev_disable(dev, true); |
09ece142 KB |
2347 | } |
2348 | ||
f58944e2 KB |
2349 | /* |
2350 | * The driver's remove may be called on a device in a partially initialized | |
2351 | * state. This function must not have any dependencies on the device state in | |
2352 | * order to proceed. | |
2353 | */ | |
8d85fce7 | 2354 | static void nvme_remove(struct pci_dev *pdev) |
b60503ba MW |
2355 | { |
2356 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
9a6b9458 | 2357 | |
bb8d261e CH |
2358 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); |
2359 | ||
82b057ca | 2360 | cancel_work_sync(&dev->reset_work); |
9a6b9458 | 2361 | pci_set_drvdata(pdev, NULL); |
0ff9d4e1 | 2362 | |
6db28eda | 2363 | if (!pci_device_is_present(pdev)) { |
0ff9d4e1 | 2364 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DEAD); |
6db28eda KB |
2365 | nvme_dev_disable(dev, false); |
2366 | } | |
0ff9d4e1 | 2367 | |
9bf2b972 | 2368 | flush_work(&dev->reset_work); |
53029b04 | 2369 | nvme_uninit_ctrl(&dev->ctrl); |
a5cdb68c | 2370 | nvme_dev_disable(dev, true); |
87ad72a5 | 2371 | nvme_free_host_mem(dev); |
a4aea562 | 2372 | nvme_dev_remove_admin(dev); |
a1a5ef99 | 2373 | nvme_free_queues(dev, 0); |
9a6b9458 | 2374 | nvme_release_prp_pools(dev); |
b00a726a | 2375 | nvme_dev_unmap(dev); |
1673f1f0 | 2376 | nvme_put_ctrl(&dev->ctrl); |
b60503ba MW |
2377 | } |
2378 | ||
13880f5b KB |
2379 | static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs) |
2380 | { | |
2381 | int ret = 0; | |
2382 | ||
2383 | if (numvfs == 0) { | |
2384 | if (pci_vfs_assigned(pdev)) { | |
2385 | dev_warn(&pdev->dev, | |
2386 | "Cannot disable SR-IOV VFs while assigned\n"); | |
2387 | return -EPERM; | |
2388 | } | |
2389 | pci_disable_sriov(pdev); | |
2390 | return 0; | |
2391 | } | |
2392 | ||
2393 | ret = pci_enable_sriov(pdev, numvfs); | |
2394 | return ret ? ret : numvfs; | |
2395 | } | |
2396 | ||
671a6018 | 2397 | #ifdef CONFIG_PM_SLEEP |
cd638946 KB |
2398 | static int nvme_suspend(struct device *dev) |
2399 | { | |
2400 | struct pci_dev *pdev = to_pci_dev(dev); | |
2401 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
2402 | ||
a5cdb68c | 2403 | nvme_dev_disable(ndev, true); |
cd638946 KB |
2404 | return 0; |
2405 | } | |
2406 | ||
2407 | static int nvme_resume(struct device *dev) | |
2408 | { | |
2409 | struct pci_dev *pdev = to_pci_dev(dev); | |
2410 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
cd638946 | 2411 | |
c5f6ce97 | 2412 | nvme_reset(ndev); |
9a6b9458 | 2413 | return 0; |
cd638946 | 2414 | } |
671a6018 | 2415 | #endif |
cd638946 KB |
2416 | |
2417 | static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); | |
b60503ba | 2418 | |
a0a3408e KB |
2419 | static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev, |
2420 | pci_channel_state_t state) | |
2421 | { | |
2422 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
2423 | ||
2424 | /* | |
2425 | * A frozen channel requires a reset. When detected, this method will | |
2426 | * shutdown the controller to quiesce. The controller will be restarted | |
2427 | * after the slot reset through driver's slot_reset callback. | |
2428 | */ | |
a0a3408e KB |
2429 | switch (state) { |
2430 | case pci_channel_io_normal: | |
2431 | return PCI_ERS_RESULT_CAN_RECOVER; | |
2432 | case pci_channel_io_frozen: | |
d011fb31 KB |
2433 | dev_warn(dev->ctrl.device, |
2434 | "frozen state error detected, reset controller\n"); | |
a5cdb68c | 2435 | nvme_dev_disable(dev, false); |
a0a3408e KB |
2436 | return PCI_ERS_RESULT_NEED_RESET; |
2437 | case pci_channel_io_perm_failure: | |
d011fb31 KB |
2438 | dev_warn(dev->ctrl.device, |
2439 | "failure state error detected, request disconnect\n"); | |
a0a3408e KB |
2440 | return PCI_ERS_RESULT_DISCONNECT; |
2441 | } | |
2442 | return PCI_ERS_RESULT_NEED_RESET; | |
2443 | } | |
2444 | ||
2445 | static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) | |
2446 | { | |
2447 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
2448 | ||
1b3c47c1 | 2449 | dev_info(dev->ctrl.device, "restart after slot reset\n"); |
a0a3408e | 2450 | pci_restore_state(pdev); |
c5f6ce97 | 2451 | nvme_reset(dev); |
a0a3408e KB |
2452 | return PCI_ERS_RESULT_RECOVERED; |
2453 | } | |
2454 | ||
2455 | static void nvme_error_resume(struct pci_dev *pdev) | |
2456 | { | |
2457 | pci_cleanup_aer_uncorrect_error_status(pdev); | |
2458 | } | |
2459 | ||
1d352035 | 2460 | static const struct pci_error_handlers nvme_err_handler = { |
b60503ba | 2461 | .error_detected = nvme_error_detected, |
b60503ba MW |
2462 | .slot_reset = nvme_slot_reset, |
2463 | .resume = nvme_error_resume, | |
f0d54a54 | 2464 | .reset_notify = nvme_reset_notify, |
b60503ba MW |
2465 | }; |
2466 | ||
6eb0d698 | 2467 | static const struct pci_device_id nvme_id_table[] = { |
106198ed | 2468 | { PCI_VDEVICE(INTEL, 0x0953), |
08095e70 | 2469 | .driver_data = NVME_QUIRK_STRIPE_SIZE | |
e850fd16 | 2470 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
99466e70 KB |
2471 | { PCI_VDEVICE(INTEL, 0x0a53), |
2472 | .driver_data = NVME_QUIRK_STRIPE_SIZE | | |
e850fd16 | 2473 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
99466e70 KB |
2474 | { PCI_VDEVICE(INTEL, 0x0a54), |
2475 | .driver_data = NVME_QUIRK_STRIPE_SIZE | | |
e850fd16 | 2476 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
50af47d0 AL |
2477 | { PCI_VDEVICE(INTEL, 0xf1a5), /* Intel 600P/P3100 */ |
2478 | .driver_data = NVME_QUIRK_NO_DEEPEST_PS }, | |
540c801c KB |
2479 | { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ |
2480 | .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, | |
54adc010 GP |
2481 | { PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */ |
2482 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
015282c9 WW |
2483 | { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ |
2484 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
b60503ba | 2485 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
c74dc780 | 2486 | { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, |
124298bd | 2487 | { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) }, |
b60503ba MW |
2488 | { 0, } |
2489 | }; | |
2490 | MODULE_DEVICE_TABLE(pci, nvme_id_table); | |
2491 | ||
2492 | static struct pci_driver nvme_driver = { | |
2493 | .name = "nvme", | |
2494 | .id_table = nvme_id_table, | |
2495 | .probe = nvme_probe, | |
8d85fce7 | 2496 | .remove = nvme_remove, |
09ece142 | 2497 | .shutdown = nvme_shutdown, |
cd638946 KB |
2498 | .driver = { |
2499 | .pm = &nvme_dev_pm_ops, | |
2500 | }, | |
13880f5b | 2501 | .sriov_configure = nvme_pci_sriov_configure, |
b60503ba MW |
2502 | .err_handler = &nvme_err_handler, |
2503 | }; | |
2504 | ||
2505 | static int __init nvme_init(void) | |
2506 | { | |
9a6327d2 | 2507 | return pci_register_driver(&nvme_driver); |
b60503ba MW |
2508 | } |
2509 | ||
2510 | static void __exit nvme_exit(void) | |
2511 | { | |
2512 | pci_unregister_driver(&nvme_driver); | |
21bd78bc | 2513 | _nvme_check_size(); |
b60503ba MW |
2514 | } |
2515 | ||
2516 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); | |
2517 | MODULE_LICENSE("GPL"); | |
c78b4713 | 2518 | MODULE_VERSION("1.0"); |
b60503ba MW |
2519 | module_init(nvme_init); |
2520 | module_exit(nvme_exit); |