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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> |
b60503ba | 16 | #include <linux/blkdev.h> |
a4aea562 | 17 | #include <linux/blk-mq.h> |
dca51e78 | 18 | #include <linux/blk-mq-pci.h> |
ff5350a8 | 19 | #include <linux/dmi.h> |
b60503ba MW |
20 | #include <linux/init.h> |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/io.h> | |
b60503ba MW |
23 | #include <linux/mm.h> |
24 | #include <linux/module.h> | |
77bf25ea | 25 | #include <linux/mutex.h> |
d0877473 | 26 | #include <linux/once.h> |
b60503ba | 27 | #include <linux/pci.h> |
e1e5e564 | 28 | #include <linux/t10-pi.h> |
b60503ba | 29 | #include <linux/types.h> |
2f8e2c87 | 30 | #include <linux/io-64-nonatomic-lo-hi.h> |
a98e58e5 | 31 | #include <linux/sed-opal.h> |
797a796a | 32 | |
f11bb3e2 CH |
33 | #include "nvme.h" |
34 | ||
b60503ba MW |
35 | #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) |
36 | #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) | |
c965809c | 37 | |
a7a7cbe3 | 38 | #define SGES_PER_PAGE (PAGE_SIZE / sizeof(struct nvme_sgl_desc)) |
9d43cf64 | 39 | |
58ffacb5 MW |
40 | static int use_threaded_interrupts; |
41 | module_param(use_threaded_interrupts, int, 0); | |
42 | ||
8ffaadf7 JD |
43 | static bool use_cmb_sqes = true; |
44 | module_param(use_cmb_sqes, bool, 0644); | |
45 | MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); | |
46 | ||
87ad72a5 CH |
47 | static unsigned int max_host_mem_size_mb = 128; |
48 | module_param(max_host_mem_size_mb, uint, 0444); | |
49 | MODULE_PARM_DESC(max_host_mem_size_mb, | |
50 | "Maximum Host Memory Buffer (HMB) size per controller (in MiB)"); | |
1fa6aead | 51 | |
a7a7cbe3 CK |
52 | static unsigned int sgl_threshold = SZ_32K; |
53 | module_param(sgl_threshold, uint, 0644); | |
54 | MODULE_PARM_DESC(sgl_threshold, | |
55 | "Use SGLs when average request segment size is larger or equal to " | |
56 | "this size. Use 0 to disable SGLs."); | |
57 | ||
b27c1e68 | 58 | static int io_queue_depth_set(const char *val, const struct kernel_param *kp); |
59 | static const struct kernel_param_ops io_queue_depth_ops = { | |
60 | .set = io_queue_depth_set, | |
61 | .get = param_get_int, | |
62 | }; | |
63 | ||
64 | static int io_queue_depth = 1024; | |
65 | module_param_cb(io_queue_depth, &io_queue_depth_ops, &io_queue_depth, 0644); | |
66 | MODULE_PARM_DESC(io_queue_depth, "set io queue depth, should >= 2"); | |
67 | ||
1c63dc66 CH |
68 | struct nvme_dev; |
69 | struct nvme_queue; | |
b3fffdef | 70 | |
a0fa9647 | 71 | static void nvme_process_cq(struct nvme_queue *nvmeq); |
a5cdb68c | 72 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown); |
d4b4ff8e | 73 | |
1c63dc66 CH |
74 | /* |
75 | * Represents an NVM Express device. Each nvme_dev is a PCI function. | |
76 | */ | |
77 | struct nvme_dev { | |
147b27e4 | 78 | struct nvme_queue *queues; |
1c63dc66 CH |
79 | struct blk_mq_tag_set tagset; |
80 | struct blk_mq_tag_set admin_tagset; | |
81 | u32 __iomem *dbs; | |
82 | struct device *dev; | |
83 | struct dma_pool *prp_page_pool; | |
84 | struct dma_pool *prp_small_pool; | |
1c63dc66 CH |
85 | unsigned online_queues; |
86 | unsigned max_qid; | |
87 | int q_depth; | |
88 | u32 db_stride; | |
1c63dc66 | 89 | void __iomem *bar; |
97f6ef64 | 90 | unsigned long bar_mapped_size; |
5c8809e6 | 91 | struct work_struct remove_work; |
77bf25ea | 92 | struct mutex shutdown_lock; |
1c63dc66 | 93 | bool subsystem; |
1c63dc66 | 94 | void __iomem *cmb; |
8969f1f8 | 95 | pci_bus_addr_t cmb_bus_addr; |
1c63dc66 CH |
96 | u64 cmb_size; |
97 | u32 cmbsz; | |
202021c1 | 98 | u32 cmbloc; |
1c63dc66 | 99 | struct nvme_ctrl ctrl; |
db3cbfff | 100 | struct completion ioq_wait; |
87ad72a5 CH |
101 | |
102 | /* shadow doorbell buffer support: */ | |
f9f38e33 HK |
103 | u32 *dbbuf_dbs; |
104 | dma_addr_t dbbuf_dbs_dma_addr; | |
105 | u32 *dbbuf_eis; | |
106 | dma_addr_t dbbuf_eis_dma_addr; | |
87ad72a5 CH |
107 | |
108 | /* host memory buffer support: */ | |
109 | u64 host_mem_size; | |
110 | u32 nr_host_mem_descs; | |
4033f35d | 111 | dma_addr_t host_mem_descs_dma; |
87ad72a5 CH |
112 | struct nvme_host_mem_buf_desc *host_mem_descs; |
113 | void **host_mem_desc_bufs; | |
4d115420 | 114 | }; |
1fa6aead | 115 | |
b27c1e68 | 116 | static int io_queue_depth_set(const char *val, const struct kernel_param *kp) |
117 | { | |
118 | int n = 0, ret; | |
119 | ||
120 | ret = kstrtoint(val, 10, &n); | |
121 | if (ret != 0 || n < 2) | |
122 | return -EINVAL; | |
123 | ||
124 | return param_set_int(val, kp); | |
125 | } | |
126 | ||
f9f38e33 HK |
127 | static inline unsigned int sq_idx(unsigned int qid, u32 stride) |
128 | { | |
129 | return qid * 2 * stride; | |
130 | } | |
131 | ||
132 | static inline unsigned int cq_idx(unsigned int qid, u32 stride) | |
133 | { | |
134 | return (qid * 2 + 1) * stride; | |
135 | } | |
136 | ||
1c63dc66 CH |
137 | static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) |
138 | { | |
139 | return container_of(ctrl, struct nvme_dev, ctrl); | |
140 | } | |
141 | ||
b60503ba MW |
142 | /* |
143 | * An NVM Express queue. Each device has at least two (one for admin | |
144 | * commands and one for I/O commands). | |
145 | */ | |
146 | struct nvme_queue { | |
147 | struct device *q_dmadev; | |
091b6092 | 148 | struct nvme_dev *dev; |
b60503ba MW |
149 | spinlock_t q_lock; |
150 | struct nvme_command *sq_cmds; | |
8ffaadf7 | 151 | struct nvme_command __iomem *sq_cmds_io; |
b60503ba | 152 | volatile struct nvme_completion *cqes; |
42483228 | 153 | struct blk_mq_tags **tags; |
b60503ba MW |
154 | dma_addr_t sq_dma_addr; |
155 | dma_addr_t cq_dma_addr; | |
b60503ba MW |
156 | u32 __iomem *q_db; |
157 | u16 q_depth; | |
6222d172 | 158 | s16 cq_vector; |
b60503ba MW |
159 | u16 sq_tail; |
160 | u16 cq_head; | |
c30341dc | 161 | u16 qid; |
e9539f47 MW |
162 | u8 cq_phase; |
163 | u8 cqe_seen; | |
f9f38e33 HK |
164 | u32 *dbbuf_sq_db; |
165 | u32 *dbbuf_cq_db; | |
166 | u32 *dbbuf_sq_ei; | |
167 | u32 *dbbuf_cq_ei; | |
b60503ba MW |
168 | }; |
169 | ||
71bd150c CH |
170 | /* |
171 | * The nvme_iod describes the data in an I/O, including the list of PRP | |
172 | * entries. You can't see it in this data structure because C doesn't let | |
f4800d6d | 173 | * me express that. Use nvme_init_iod to ensure there's enough space |
71bd150c CH |
174 | * allocated to store the PRP list. |
175 | */ | |
176 | struct nvme_iod { | |
d49187e9 | 177 | struct nvme_request req; |
f4800d6d | 178 | struct nvme_queue *nvmeq; |
a7a7cbe3 | 179 | bool use_sgl; |
f4800d6d | 180 | int aborted; |
71bd150c | 181 | int npages; /* In the PRP list. 0 means small pool in use */ |
71bd150c CH |
182 | int nents; /* Used in scatterlist */ |
183 | int length; /* Of data, in bytes */ | |
184 | dma_addr_t first_dma; | |
bf684057 | 185 | struct scatterlist meta_sg; /* metadata requires single contiguous buffer */ |
f4800d6d CH |
186 | struct scatterlist *sg; |
187 | struct scatterlist inline_sg[0]; | |
b60503ba MW |
188 | }; |
189 | ||
190 | /* | |
191 | * Check we didin't inadvertently grow the command struct | |
192 | */ | |
193 | static inline void _nvme_check_size(void) | |
194 | { | |
195 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); | |
196 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); | |
197 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); | |
198 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); | |
199 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); | |
f8ebf840 | 200 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
c30341dc | 201 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
b60503ba | 202 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
0add5e8e JT |
203 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != NVME_IDENTIFY_DATA_SIZE); |
204 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != NVME_IDENTIFY_DATA_SIZE); | |
b60503ba | 205 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); |
6ecec745 | 206 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
f9f38e33 HK |
207 | BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); |
208 | } | |
209 | ||
210 | static inline unsigned int nvme_dbbuf_size(u32 stride) | |
211 | { | |
212 | return ((num_possible_cpus() + 1) * 8 * stride); | |
213 | } | |
214 | ||
215 | static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev) | |
216 | { | |
217 | unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); | |
218 | ||
219 | if (dev->dbbuf_dbs) | |
220 | return 0; | |
221 | ||
222 | dev->dbbuf_dbs = dma_alloc_coherent(dev->dev, mem_size, | |
223 | &dev->dbbuf_dbs_dma_addr, | |
224 | GFP_KERNEL); | |
225 | if (!dev->dbbuf_dbs) | |
226 | return -ENOMEM; | |
227 | dev->dbbuf_eis = dma_alloc_coherent(dev->dev, mem_size, | |
228 | &dev->dbbuf_eis_dma_addr, | |
229 | GFP_KERNEL); | |
230 | if (!dev->dbbuf_eis) { | |
231 | dma_free_coherent(dev->dev, mem_size, | |
232 | dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); | |
233 | dev->dbbuf_dbs = NULL; | |
234 | return -ENOMEM; | |
235 | } | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static void nvme_dbbuf_dma_free(struct nvme_dev *dev) | |
241 | { | |
242 | unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); | |
243 | ||
244 | if (dev->dbbuf_dbs) { | |
245 | dma_free_coherent(dev->dev, mem_size, | |
246 | dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); | |
247 | dev->dbbuf_dbs = NULL; | |
248 | } | |
249 | if (dev->dbbuf_eis) { | |
250 | dma_free_coherent(dev->dev, mem_size, | |
251 | dev->dbbuf_eis, dev->dbbuf_eis_dma_addr); | |
252 | dev->dbbuf_eis = NULL; | |
253 | } | |
254 | } | |
255 | ||
256 | static void nvme_dbbuf_init(struct nvme_dev *dev, | |
257 | struct nvme_queue *nvmeq, int qid) | |
258 | { | |
259 | if (!dev->dbbuf_dbs || !qid) | |
260 | return; | |
261 | ||
262 | nvmeq->dbbuf_sq_db = &dev->dbbuf_dbs[sq_idx(qid, dev->db_stride)]; | |
263 | nvmeq->dbbuf_cq_db = &dev->dbbuf_dbs[cq_idx(qid, dev->db_stride)]; | |
264 | nvmeq->dbbuf_sq_ei = &dev->dbbuf_eis[sq_idx(qid, dev->db_stride)]; | |
265 | nvmeq->dbbuf_cq_ei = &dev->dbbuf_eis[cq_idx(qid, dev->db_stride)]; | |
266 | } | |
267 | ||
268 | static void nvme_dbbuf_set(struct nvme_dev *dev) | |
269 | { | |
270 | struct nvme_command c; | |
271 | ||
272 | if (!dev->dbbuf_dbs) | |
273 | return; | |
274 | ||
275 | memset(&c, 0, sizeof(c)); | |
276 | c.dbbuf.opcode = nvme_admin_dbbuf; | |
277 | c.dbbuf.prp1 = cpu_to_le64(dev->dbbuf_dbs_dma_addr); | |
278 | c.dbbuf.prp2 = cpu_to_le64(dev->dbbuf_eis_dma_addr); | |
279 | ||
280 | if (nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0)) { | |
9bdcfb10 | 281 | dev_warn(dev->ctrl.device, "unable to set dbbuf\n"); |
f9f38e33 HK |
282 | /* Free memory and continue on */ |
283 | nvme_dbbuf_dma_free(dev); | |
284 | } | |
285 | } | |
286 | ||
287 | static inline int nvme_dbbuf_need_event(u16 event_idx, u16 new_idx, u16 old) | |
288 | { | |
289 | return (u16)(new_idx - event_idx - 1) < (u16)(new_idx - old); | |
290 | } | |
291 | ||
292 | /* Update dbbuf and return true if an MMIO is required */ | |
293 | static bool nvme_dbbuf_update_and_check_event(u16 value, u32 *dbbuf_db, | |
294 | volatile u32 *dbbuf_ei) | |
295 | { | |
296 | if (dbbuf_db) { | |
297 | u16 old_value; | |
298 | ||
299 | /* | |
300 | * Ensure that the queue is written before updating | |
301 | * the doorbell in memory | |
302 | */ | |
303 | wmb(); | |
304 | ||
305 | old_value = *dbbuf_db; | |
306 | *dbbuf_db = value; | |
307 | ||
308 | if (!nvme_dbbuf_need_event(*dbbuf_ei, value, old_value)) | |
309 | return false; | |
310 | } | |
311 | ||
312 | return true; | |
b60503ba MW |
313 | } |
314 | ||
ac3dd5bd JA |
315 | /* |
316 | * Max size of iod being embedded in the request payload | |
317 | */ | |
318 | #define NVME_INT_PAGES 2 | |
5fd4ce1b | 319 | #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) |
ac3dd5bd JA |
320 | |
321 | /* | |
322 | * Will slightly overestimate the number of pages needed. This is OK | |
323 | * as it only leads to a small amount of wasted memory for the lifetime of | |
324 | * the I/O. | |
325 | */ | |
326 | static int nvme_npages(unsigned size, struct nvme_dev *dev) | |
327 | { | |
5fd4ce1b CH |
328 | unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, |
329 | dev->ctrl.page_size); | |
ac3dd5bd JA |
330 | return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); |
331 | } | |
332 | ||
a7a7cbe3 CK |
333 | /* |
334 | * Calculates the number of pages needed for the SGL segments. For example a 4k | |
335 | * page can accommodate 256 SGL descriptors. | |
336 | */ | |
337 | static int nvme_pci_npages_sgl(unsigned int num_seg) | |
ac3dd5bd | 338 | { |
a7a7cbe3 | 339 | return DIV_ROUND_UP(num_seg * sizeof(struct nvme_sgl_desc), PAGE_SIZE); |
f4800d6d | 340 | } |
ac3dd5bd | 341 | |
a7a7cbe3 CK |
342 | static unsigned int nvme_pci_iod_alloc_size(struct nvme_dev *dev, |
343 | unsigned int size, unsigned int nseg, bool use_sgl) | |
f4800d6d | 344 | { |
a7a7cbe3 CK |
345 | size_t alloc_size; |
346 | ||
347 | if (use_sgl) | |
348 | alloc_size = sizeof(__le64 *) * nvme_pci_npages_sgl(nseg); | |
349 | else | |
350 | alloc_size = sizeof(__le64 *) * nvme_npages(size, dev); | |
351 | ||
352 | return alloc_size + sizeof(struct scatterlist) * nseg; | |
f4800d6d | 353 | } |
ac3dd5bd | 354 | |
a7a7cbe3 | 355 | static unsigned int nvme_pci_cmd_size(struct nvme_dev *dev, bool use_sgl) |
f4800d6d | 356 | { |
a7a7cbe3 CK |
357 | unsigned int alloc_size = nvme_pci_iod_alloc_size(dev, |
358 | NVME_INT_BYTES(dev), NVME_INT_PAGES, | |
359 | use_sgl); | |
360 | ||
361 | return sizeof(struct nvme_iod) + alloc_size; | |
ac3dd5bd JA |
362 | } |
363 | ||
a4aea562 MB |
364 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
365 | unsigned int hctx_idx) | |
e85248e5 | 366 | { |
a4aea562 | 367 | struct nvme_dev *dev = data; |
147b27e4 | 368 | struct nvme_queue *nvmeq = &dev->queues[0]; |
a4aea562 | 369 | |
42483228 KB |
370 | WARN_ON(hctx_idx != 0); |
371 | WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); | |
372 | WARN_ON(nvmeq->tags); | |
373 | ||
a4aea562 | 374 | hctx->driver_data = nvmeq; |
42483228 | 375 | nvmeq->tags = &dev->admin_tagset.tags[0]; |
a4aea562 | 376 | return 0; |
e85248e5 MW |
377 | } |
378 | ||
4af0e21c KB |
379 | static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) |
380 | { | |
381 | struct nvme_queue *nvmeq = hctx->driver_data; | |
382 | ||
383 | nvmeq->tags = NULL; | |
384 | } | |
385 | ||
a4aea562 MB |
386 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
387 | unsigned int hctx_idx) | |
b60503ba | 388 | { |
a4aea562 | 389 | struct nvme_dev *dev = data; |
147b27e4 | 390 | struct nvme_queue *nvmeq = &dev->queues[hctx_idx + 1]; |
a4aea562 | 391 | |
42483228 KB |
392 | if (!nvmeq->tags) |
393 | nvmeq->tags = &dev->tagset.tags[hctx_idx]; | |
b60503ba | 394 | |
42483228 | 395 | WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); |
a4aea562 MB |
396 | hctx->driver_data = nvmeq; |
397 | return 0; | |
b60503ba MW |
398 | } |
399 | ||
d6296d39 CH |
400 | static int nvme_init_request(struct blk_mq_tag_set *set, struct request *req, |
401 | unsigned int hctx_idx, unsigned int numa_node) | |
b60503ba | 402 | { |
d6296d39 | 403 | struct nvme_dev *dev = set->driver_data; |
f4800d6d | 404 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
0350815a | 405 | int queue_idx = (set == &dev->tagset) ? hctx_idx + 1 : 0; |
147b27e4 | 406 | struct nvme_queue *nvmeq = &dev->queues[queue_idx]; |
a4aea562 MB |
407 | |
408 | BUG_ON(!nvmeq); | |
f4800d6d | 409 | iod->nvmeq = nvmeq; |
a4aea562 MB |
410 | return 0; |
411 | } | |
412 | ||
dca51e78 CH |
413 | static int nvme_pci_map_queues(struct blk_mq_tag_set *set) |
414 | { | |
415 | struct nvme_dev *dev = set->driver_data; | |
416 | ||
417 | return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev)); | |
418 | } | |
419 | ||
b60503ba | 420 | /** |
adf68f21 | 421 | * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell |
b60503ba MW |
422 | * @nvmeq: The queue to use |
423 | * @cmd: The command to send | |
424 | * | |
425 | * Safe to use from interrupt context | |
426 | */ | |
e3f879bf SB |
427 | static void __nvme_submit_cmd(struct nvme_queue *nvmeq, |
428 | struct nvme_command *cmd) | |
b60503ba | 429 | { |
a4aea562 MB |
430 | u16 tail = nvmeq->sq_tail; |
431 | ||
8ffaadf7 JD |
432 | if (nvmeq->sq_cmds_io) |
433 | memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); | |
434 | else | |
435 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); | |
436 | ||
b60503ba MW |
437 | if (++tail == nvmeq->q_depth) |
438 | tail = 0; | |
f9f38e33 HK |
439 | if (nvme_dbbuf_update_and_check_event(tail, nvmeq->dbbuf_sq_db, |
440 | nvmeq->dbbuf_sq_ei)) | |
441 | writel(tail, nvmeq->q_db); | |
b60503ba | 442 | nvmeq->sq_tail = tail; |
b60503ba MW |
443 | } |
444 | ||
a7a7cbe3 | 445 | static void **nvme_pci_iod_list(struct request *req) |
b60503ba | 446 | { |
f4800d6d | 447 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a7a7cbe3 | 448 | return (void **)(iod->sg + blk_rq_nr_phys_segments(req)); |
b60503ba MW |
449 | } |
450 | ||
955b1b5a MI |
451 | static inline bool nvme_pci_use_sgls(struct nvme_dev *dev, struct request *req) |
452 | { | |
453 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); | |
20469a37 | 454 | int nseg = blk_rq_nr_phys_segments(req); |
955b1b5a MI |
455 | unsigned int avg_seg_size; |
456 | ||
20469a37 KB |
457 | if (nseg == 0) |
458 | return false; | |
459 | ||
460 | avg_seg_size = DIV_ROUND_UP(blk_rq_payload_bytes(req), nseg); | |
955b1b5a MI |
461 | |
462 | if (!(dev->ctrl.sgls & ((1 << 0) | (1 << 1)))) | |
463 | return false; | |
464 | if (!iod->nvmeq->qid) | |
465 | return false; | |
466 | if (!sgl_threshold || avg_seg_size < sgl_threshold) | |
467 | return false; | |
468 | return true; | |
469 | } | |
470 | ||
fc17b653 | 471 | static blk_status_t nvme_init_iod(struct request *rq, struct nvme_dev *dev) |
ac3dd5bd | 472 | { |
f4800d6d | 473 | struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); |
f9d03f96 | 474 | int nseg = blk_rq_nr_phys_segments(rq); |
b131c61d | 475 | unsigned int size = blk_rq_payload_bytes(rq); |
ac3dd5bd | 476 | |
955b1b5a MI |
477 | iod->use_sgl = nvme_pci_use_sgls(dev, rq); |
478 | ||
f4800d6d | 479 | if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { |
a7a7cbe3 CK |
480 | size_t alloc_size = nvme_pci_iod_alloc_size(dev, size, nseg, |
481 | iod->use_sgl); | |
482 | ||
483 | iod->sg = kmalloc(alloc_size, GFP_ATOMIC); | |
f4800d6d | 484 | if (!iod->sg) |
fc17b653 | 485 | return BLK_STS_RESOURCE; |
f4800d6d CH |
486 | } else { |
487 | iod->sg = iod->inline_sg; | |
ac3dd5bd JA |
488 | } |
489 | ||
f4800d6d CH |
490 | iod->aborted = 0; |
491 | iod->npages = -1; | |
492 | iod->nents = 0; | |
493 | iod->length = size; | |
f80ec966 | 494 | |
fc17b653 | 495 | return BLK_STS_OK; |
ac3dd5bd JA |
496 | } |
497 | ||
f4800d6d | 498 | static void nvme_free_iod(struct nvme_dev *dev, struct request *req) |
b60503ba | 499 | { |
f4800d6d | 500 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a7a7cbe3 CK |
501 | const int last_prp = dev->ctrl.page_size / sizeof(__le64) - 1; |
502 | dma_addr_t dma_addr = iod->first_dma, next_dma_addr; | |
503 | ||
eca18b23 | 504 | int i; |
eca18b23 MW |
505 | |
506 | if (iod->npages == 0) | |
a7a7cbe3 CK |
507 | dma_pool_free(dev->prp_small_pool, nvme_pci_iod_list(req)[0], |
508 | dma_addr); | |
509 | ||
eca18b23 | 510 | for (i = 0; i < iod->npages; i++) { |
a7a7cbe3 CK |
511 | void *addr = nvme_pci_iod_list(req)[i]; |
512 | ||
513 | if (iod->use_sgl) { | |
514 | struct nvme_sgl_desc *sg_list = addr; | |
515 | ||
516 | next_dma_addr = | |
517 | le64_to_cpu((sg_list[SGES_PER_PAGE - 1]).addr); | |
518 | } else { | |
519 | __le64 *prp_list = addr; | |
520 | ||
521 | next_dma_addr = le64_to_cpu(prp_list[last_prp]); | |
522 | } | |
523 | ||
524 | dma_pool_free(dev->prp_page_pool, addr, dma_addr); | |
525 | dma_addr = next_dma_addr; | |
eca18b23 | 526 | } |
ac3dd5bd | 527 | |
f4800d6d CH |
528 | if (iod->sg != iod->inline_sg) |
529 | kfree(iod->sg); | |
b4ff9c8d KB |
530 | } |
531 | ||
52b68d7e | 532 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
e1e5e564 KB |
533 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
534 | { | |
535 | if (be32_to_cpu(pi->ref_tag) == v) | |
536 | pi->ref_tag = cpu_to_be32(p); | |
537 | } | |
538 | ||
539 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
540 | { | |
541 | if (be32_to_cpu(pi->ref_tag) == p) | |
542 | pi->ref_tag = cpu_to_be32(v); | |
543 | } | |
544 | ||
545 | /** | |
546 | * nvme_dif_remap - remaps ref tags to bip seed and physical lba | |
547 | * | |
548 | * The virtual start sector is the one that was originally submitted by the | |
549 | * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical | |
550 | * start sector may be different. Remap protection information to match the | |
551 | * physical LBA on writes, and back to the original seed on reads. | |
552 | * | |
553 | * Type 0 and 3 do not have a ref tag, so no remapping required. | |
554 | */ | |
555 | static void nvme_dif_remap(struct request *req, | |
556 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
557 | { | |
558 | struct nvme_ns *ns = req->rq_disk->private_data; | |
559 | struct bio_integrity_payload *bip; | |
560 | struct t10_pi_tuple *pi; | |
561 | void *p, *pmap; | |
562 | u32 i, nlb, ts, phys, virt; | |
563 | ||
564 | if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) | |
565 | return; | |
566 | ||
567 | bip = bio_integrity(req->bio); | |
568 | if (!bip) | |
569 | return; | |
570 | ||
571 | pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; | |
e1e5e564 KB |
572 | |
573 | p = pmap; | |
574 | virt = bip_get_seed(bip); | |
575 | phys = nvme_block_nr(ns, blk_rq_pos(req)); | |
576 | nlb = (blk_rq_bytes(req) >> ns->lba_shift); | |
ac6fc48c | 577 | ts = ns->disk->queue->integrity.tuple_size; |
e1e5e564 KB |
578 | |
579 | for (i = 0; i < nlb; i++, virt++, phys++) { | |
580 | pi = (struct t10_pi_tuple *)p; | |
581 | dif_swap(phys, virt, pi); | |
582 | p += ts; | |
583 | } | |
584 | kunmap_atomic(pmap); | |
585 | } | |
52b68d7e KB |
586 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
587 | static void nvme_dif_remap(struct request *req, | |
588 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) | |
589 | { | |
590 | } | |
591 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) | |
592 | { | |
593 | } | |
594 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) | |
595 | { | |
596 | } | |
52b68d7e KB |
597 | #endif |
598 | ||
d0877473 KB |
599 | static void nvme_print_sgl(struct scatterlist *sgl, int nents) |
600 | { | |
601 | int i; | |
602 | struct scatterlist *sg; | |
603 | ||
604 | for_each_sg(sgl, sg, nents, i) { | |
605 | dma_addr_t phys = sg_phys(sg); | |
606 | pr_warn("sg[%d] phys_addr:%pad offset:%d length:%d " | |
607 | "dma_address:%pad dma_length:%d\n", | |
608 | i, &phys, sg->offset, sg->length, &sg_dma_address(sg), | |
609 | sg_dma_len(sg)); | |
610 | } | |
611 | } | |
612 | ||
a7a7cbe3 CK |
613 | static blk_status_t nvme_pci_setup_prps(struct nvme_dev *dev, |
614 | struct request *req, struct nvme_rw_command *cmnd) | |
ff22b54f | 615 | { |
f4800d6d | 616 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
99802a7a | 617 | struct dma_pool *pool; |
b131c61d | 618 | int length = blk_rq_payload_bytes(req); |
eca18b23 | 619 | struct scatterlist *sg = iod->sg; |
ff22b54f MW |
620 | int dma_len = sg_dma_len(sg); |
621 | u64 dma_addr = sg_dma_address(sg); | |
5fd4ce1b | 622 | u32 page_size = dev->ctrl.page_size; |
f137e0f1 | 623 | int offset = dma_addr & (page_size - 1); |
e025344c | 624 | __le64 *prp_list; |
a7a7cbe3 | 625 | void **list = nvme_pci_iod_list(req); |
e025344c | 626 | dma_addr_t prp_dma; |
eca18b23 | 627 | int nprps, i; |
ff22b54f | 628 | |
1d090624 | 629 | length -= (page_size - offset); |
5228b328 JS |
630 | if (length <= 0) { |
631 | iod->first_dma = 0; | |
a7a7cbe3 | 632 | goto done; |
5228b328 | 633 | } |
ff22b54f | 634 | |
1d090624 | 635 | dma_len -= (page_size - offset); |
ff22b54f | 636 | if (dma_len) { |
1d090624 | 637 | dma_addr += (page_size - offset); |
ff22b54f MW |
638 | } else { |
639 | sg = sg_next(sg); | |
640 | dma_addr = sg_dma_address(sg); | |
641 | dma_len = sg_dma_len(sg); | |
642 | } | |
643 | ||
1d090624 | 644 | if (length <= page_size) { |
edd10d33 | 645 | iod->first_dma = dma_addr; |
a7a7cbe3 | 646 | goto done; |
e025344c SMM |
647 | } |
648 | ||
1d090624 | 649 | nprps = DIV_ROUND_UP(length, page_size); |
99802a7a MW |
650 | if (nprps <= (256 / 8)) { |
651 | pool = dev->prp_small_pool; | |
eca18b23 | 652 | iod->npages = 0; |
99802a7a MW |
653 | } else { |
654 | pool = dev->prp_page_pool; | |
eca18b23 | 655 | iod->npages = 1; |
99802a7a MW |
656 | } |
657 | ||
69d2b571 | 658 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
b77954cb | 659 | if (!prp_list) { |
edd10d33 | 660 | iod->first_dma = dma_addr; |
eca18b23 | 661 | iod->npages = -1; |
86eea289 | 662 | return BLK_STS_RESOURCE; |
b77954cb | 663 | } |
eca18b23 MW |
664 | list[0] = prp_list; |
665 | iod->first_dma = prp_dma; | |
e025344c SMM |
666 | i = 0; |
667 | for (;;) { | |
1d090624 | 668 | if (i == page_size >> 3) { |
e025344c | 669 | __le64 *old_prp_list = prp_list; |
69d2b571 | 670 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
eca18b23 | 671 | if (!prp_list) |
86eea289 | 672 | return BLK_STS_RESOURCE; |
eca18b23 | 673 | list[iod->npages++] = prp_list; |
7523d834 MW |
674 | prp_list[0] = old_prp_list[i - 1]; |
675 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); | |
676 | i = 1; | |
e025344c SMM |
677 | } |
678 | prp_list[i++] = cpu_to_le64(dma_addr); | |
1d090624 KB |
679 | dma_len -= page_size; |
680 | dma_addr += page_size; | |
681 | length -= page_size; | |
e025344c SMM |
682 | if (length <= 0) |
683 | break; | |
684 | if (dma_len > 0) | |
685 | continue; | |
86eea289 KB |
686 | if (unlikely(dma_len < 0)) |
687 | goto bad_sgl; | |
e025344c SMM |
688 | sg = sg_next(sg); |
689 | dma_addr = sg_dma_address(sg); | |
690 | dma_len = sg_dma_len(sg); | |
ff22b54f MW |
691 | } |
692 | ||
a7a7cbe3 CK |
693 | done: |
694 | cmnd->dptr.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); | |
695 | cmnd->dptr.prp2 = cpu_to_le64(iod->first_dma); | |
696 | ||
86eea289 KB |
697 | return BLK_STS_OK; |
698 | ||
699 | bad_sgl: | |
d0877473 KB |
700 | WARN(DO_ONCE(nvme_print_sgl, iod->sg, iod->nents), |
701 | "Invalid SGL for payload:%d nents:%d\n", | |
702 | blk_rq_payload_bytes(req), iod->nents); | |
86eea289 | 703 | return BLK_STS_IOERR; |
ff22b54f MW |
704 | } |
705 | ||
a7a7cbe3 CK |
706 | static void nvme_pci_sgl_set_data(struct nvme_sgl_desc *sge, |
707 | struct scatterlist *sg) | |
708 | { | |
709 | sge->addr = cpu_to_le64(sg_dma_address(sg)); | |
710 | sge->length = cpu_to_le32(sg_dma_len(sg)); | |
711 | sge->type = NVME_SGL_FMT_DATA_DESC << 4; | |
712 | } | |
713 | ||
714 | static void nvme_pci_sgl_set_seg(struct nvme_sgl_desc *sge, | |
715 | dma_addr_t dma_addr, int entries) | |
716 | { | |
717 | sge->addr = cpu_to_le64(dma_addr); | |
718 | if (entries < SGES_PER_PAGE) { | |
719 | sge->length = cpu_to_le32(entries * sizeof(*sge)); | |
720 | sge->type = NVME_SGL_FMT_LAST_SEG_DESC << 4; | |
721 | } else { | |
722 | sge->length = cpu_to_le32(PAGE_SIZE); | |
723 | sge->type = NVME_SGL_FMT_SEG_DESC << 4; | |
724 | } | |
725 | } | |
726 | ||
727 | static blk_status_t nvme_pci_setup_sgls(struct nvme_dev *dev, | |
b0f2853b | 728 | struct request *req, struct nvme_rw_command *cmd, int entries) |
a7a7cbe3 CK |
729 | { |
730 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); | |
a7a7cbe3 CK |
731 | struct dma_pool *pool; |
732 | struct nvme_sgl_desc *sg_list; | |
733 | struct scatterlist *sg = iod->sg; | |
a7a7cbe3 | 734 | dma_addr_t sgl_dma; |
b0f2853b | 735 | int i = 0; |
a7a7cbe3 | 736 | |
a7a7cbe3 CK |
737 | /* setting the transfer type as SGL */ |
738 | cmd->flags = NVME_CMD_SGL_METABUF; | |
739 | ||
b0f2853b | 740 | if (entries == 1) { |
a7a7cbe3 CK |
741 | nvme_pci_sgl_set_data(&cmd->dptr.sgl, sg); |
742 | return BLK_STS_OK; | |
743 | } | |
744 | ||
745 | if (entries <= (256 / sizeof(struct nvme_sgl_desc))) { | |
746 | pool = dev->prp_small_pool; | |
747 | iod->npages = 0; | |
748 | } else { | |
749 | pool = dev->prp_page_pool; | |
750 | iod->npages = 1; | |
751 | } | |
752 | ||
753 | sg_list = dma_pool_alloc(pool, GFP_ATOMIC, &sgl_dma); | |
754 | if (!sg_list) { | |
755 | iod->npages = -1; | |
756 | return BLK_STS_RESOURCE; | |
757 | } | |
758 | ||
759 | nvme_pci_iod_list(req)[0] = sg_list; | |
760 | iod->first_dma = sgl_dma; | |
761 | ||
762 | nvme_pci_sgl_set_seg(&cmd->dptr.sgl, sgl_dma, entries); | |
763 | ||
764 | do { | |
765 | if (i == SGES_PER_PAGE) { | |
766 | struct nvme_sgl_desc *old_sg_desc = sg_list; | |
767 | struct nvme_sgl_desc *link = &old_sg_desc[i - 1]; | |
768 | ||
769 | sg_list = dma_pool_alloc(pool, GFP_ATOMIC, &sgl_dma); | |
770 | if (!sg_list) | |
771 | return BLK_STS_RESOURCE; | |
772 | ||
773 | i = 0; | |
774 | nvme_pci_iod_list(req)[iod->npages++] = sg_list; | |
775 | sg_list[i++] = *link; | |
776 | nvme_pci_sgl_set_seg(link, sgl_dma, entries); | |
777 | } | |
778 | ||
779 | nvme_pci_sgl_set_data(&sg_list[i++], sg); | |
a7a7cbe3 | 780 | sg = sg_next(sg); |
b0f2853b | 781 | } while (--entries > 0); |
a7a7cbe3 | 782 | |
a7a7cbe3 CK |
783 | return BLK_STS_OK; |
784 | } | |
785 | ||
fc17b653 | 786 | static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, |
b131c61d | 787 | struct nvme_command *cmnd) |
d29ec824 | 788 | { |
f4800d6d | 789 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
ba1ca37e CH |
790 | struct request_queue *q = req->q; |
791 | enum dma_data_direction dma_dir = rq_data_dir(req) ? | |
792 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
fc17b653 | 793 | blk_status_t ret = BLK_STS_IOERR; |
b0f2853b | 794 | int nr_mapped; |
d29ec824 | 795 | |
f9d03f96 | 796 | sg_init_table(iod->sg, blk_rq_nr_phys_segments(req)); |
ba1ca37e CH |
797 | iod->nents = blk_rq_map_sg(q, req, iod->sg); |
798 | if (!iod->nents) | |
799 | goto out; | |
d29ec824 | 800 | |
fc17b653 | 801 | ret = BLK_STS_RESOURCE; |
b0f2853b CH |
802 | nr_mapped = dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir, |
803 | DMA_ATTR_NO_WARN); | |
804 | if (!nr_mapped) | |
ba1ca37e | 805 | goto out; |
d29ec824 | 806 | |
955b1b5a | 807 | if (iod->use_sgl) |
b0f2853b | 808 | ret = nvme_pci_setup_sgls(dev, req, &cmnd->rw, nr_mapped); |
a7a7cbe3 CK |
809 | else |
810 | ret = nvme_pci_setup_prps(dev, req, &cmnd->rw); | |
811 | ||
86eea289 | 812 | if (ret != BLK_STS_OK) |
ba1ca37e | 813 | goto out_unmap; |
0e5e4f0e | 814 | |
fc17b653 | 815 | ret = BLK_STS_IOERR; |
ba1ca37e CH |
816 | if (blk_integrity_rq(req)) { |
817 | if (blk_rq_count_integrity_sg(q, req->bio) != 1) | |
818 | goto out_unmap; | |
0e5e4f0e | 819 | |
bf684057 CH |
820 | sg_init_table(&iod->meta_sg, 1); |
821 | if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) | |
ba1ca37e | 822 | goto out_unmap; |
0e5e4f0e | 823 | |
b5d8af5b | 824 | if (req_op(req) == REQ_OP_WRITE) |
ba1ca37e | 825 | nvme_dif_remap(req, nvme_dif_prep); |
0e5e4f0e | 826 | |
bf684057 | 827 | if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) |
ba1ca37e | 828 | goto out_unmap; |
d29ec824 | 829 | } |
00df5cb4 | 830 | |
ba1ca37e | 831 | if (blk_integrity_rq(req)) |
bf684057 | 832 | cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg)); |
fc17b653 | 833 | return BLK_STS_OK; |
00df5cb4 | 834 | |
ba1ca37e CH |
835 | out_unmap: |
836 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
837 | out: | |
838 | return ret; | |
00df5cb4 MW |
839 | } |
840 | ||
f4800d6d | 841 | static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) |
b60503ba | 842 | { |
f4800d6d | 843 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
d4f6c3ab CH |
844 | enum dma_data_direction dma_dir = rq_data_dir(req) ? |
845 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
846 | ||
847 | if (iod->nents) { | |
848 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); | |
849 | if (blk_integrity_rq(req)) { | |
b5d8af5b | 850 | if (req_op(req) == REQ_OP_READ) |
d4f6c3ab | 851 | nvme_dif_remap(req, nvme_dif_complete); |
bf684057 | 852 | dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); |
e1e5e564 | 853 | } |
e19b127f | 854 | } |
e1e5e564 | 855 | |
f9d03f96 | 856 | nvme_cleanup_cmd(req); |
f4800d6d | 857 | nvme_free_iod(dev, req); |
d4f6c3ab | 858 | } |
b60503ba | 859 | |
d29ec824 CH |
860 | /* |
861 | * NOTE: ns is NULL when called on the admin queue. | |
862 | */ | |
fc17b653 | 863 | static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
a4aea562 | 864 | const struct blk_mq_queue_data *bd) |
edd10d33 | 865 | { |
a4aea562 MB |
866 | struct nvme_ns *ns = hctx->queue->queuedata; |
867 | struct nvme_queue *nvmeq = hctx->driver_data; | |
d29ec824 | 868 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 | 869 | struct request *req = bd->rq; |
ba1ca37e | 870 | struct nvme_command cmnd; |
ebe6d874 | 871 | blk_status_t ret; |
e1e5e564 | 872 | |
f9d03f96 | 873 | ret = nvme_setup_cmd(ns, req, &cmnd); |
fc17b653 | 874 | if (ret) |
f4800d6d | 875 | return ret; |
a4aea562 | 876 | |
b131c61d | 877 | ret = nvme_init_iod(req, dev); |
fc17b653 | 878 | if (ret) |
f9d03f96 | 879 | goto out_free_cmd; |
a4aea562 | 880 | |
fc17b653 | 881 | if (blk_rq_nr_phys_segments(req)) { |
b131c61d | 882 | ret = nvme_map_data(dev, req, &cmnd); |
fc17b653 CH |
883 | if (ret) |
884 | goto out_cleanup_iod; | |
885 | } | |
a4aea562 | 886 | |
aae239e1 | 887 | blk_mq_start_request(req); |
a4aea562 | 888 | |
ba1ca37e | 889 | spin_lock_irq(&nvmeq->q_lock); |
ae1fba20 | 890 | if (unlikely(nvmeq->cq_vector < 0)) { |
fc17b653 | 891 | ret = BLK_STS_IOERR; |
ae1fba20 | 892 | spin_unlock_irq(&nvmeq->q_lock); |
f9d03f96 | 893 | goto out_cleanup_iod; |
ae1fba20 | 894 | } |
ba1ca37e | 895 | __nvme_submit_cmd(nvmeq, &cmnd); |
a4aea562 MB |
896 | nvme_process_cq(nvmeq); |
897 | spin_unlock_irq(&nvmeq->q_lock); | |
fc17b653 | 898 | return BLK_STS_OK; |
f9d03f96 | 899 | out_cleanup_iod: |
f4800d6d | 900 | nvme_free_iod(dev, req); |
f9d03f96 CH |
901 | out_free_cmd: |
902 | nvme_cleanup_cmd(req); | |
ba1ca37e | 903 | return ret; |
b60503ba | 904 | } |
e1e5e564 | 905 | |
77f02a7a | 906 | static void nvme_pci_complete_rq(struct request *req) |
eee417b0 | 907 | { |
f4800d6d | 908 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
a4aea562 | 909 | |
77f02a7a CH |
910 | nvme_unmap_data(iod->nvmeq->dev, req); |
911 | nvme_complete_rq(req); | |
b60503ba MW |
912 | } |
913 | ||
d783e0bd MR |
914 | /* We read the CQE phase first to check if the rest of the entry is valid */ |
915 | static inline bool nvme_cqe_valid(struct nvme_queue *nvmeq, u16 head, | |
916 | u16 phase) | |
917 | { | |
918 | return (le16_to_cpu(nvmeq->cqes[head].status) & 1) == phase; | |
919 | } | |
920 | ||
eb281c82 | 921 | static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq) |
b60503ba | 922 | { |
eb281c82 | 923 | u16 head = nvmeq->cq_head; |
adf68f21 | 924 | |
eb281c82 SG |
925 | if (likely(nvmeq->cq_vector >= 0)) { |
926 | if (nvme_dbbuf_update_and_check_event(head, nvmeq->dbbuf_cq_db, | |
927 | nvmeq->dbbuf_cq_ei)) | |
928 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); | |
929 | } | |
930 | } | |
aae239e1 | 931 | |
83a12fb7 SG |
932 | static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, |
933 | struct nvme_completion *cqe) | |
934 | { | |
935 | struct request *req; | |
adf68f21 | 936 | |
83a12fb7 SG |
937 | if (unlikely(cqe->command_id >= nvmeq->q_depth)) { |
938 | dev_warn(nvmeq->dev->ctrl.device, | |
939 | "invalid id %d completed on queue %d\n", | |
940 | cqe->command_id, le16_to_cpu(cqe->sq_id)); | |
941 | return; | |
b60503ba MW |
942 | } |
943 | ||
83a12fb7 SG |
944 | /* |
945 | * AEN requests are special as they don't time out and can | |
946 | * survive any kind of queue freeze and often don't respond to | |
947 | * aborts. We don't even bother to allocate a struct request | |
948 | * for them but rather special case them here. | |
949 | */ | |
950 | if (unlikely(nvmeq->qid == 0 && | |
38dabe21 | 951 | cqe->command_id >= NVME_AQ_BLK_MQ_DEPTH)) { |
83a12fb7 SG |
952 | nvme_complete_async_event(&nvmeq->dev->ctrl, |
953 | cqe->status, &cqe->result); | |
a0fa9647 | 954 | return; |
83a12fb7 | 955 | } |
b60503ba | 956 | |
e9d8a0fd | 957 | nvmeq->cqe_seen = 1; |
83a12fb7 SG |
958 | req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id); |
959 | nvme_end_request(req, cqe->status, cqe->result); | |
960 | } | |
b60503ba | 961 | |
920d13a8 SG |
962 | static inline bool nvme_read_cqe(struct nvme_queue *nvmeq, |
963 | struct nvme_completion *cqe) | |
b60503ba | 964 | { |
920d13a8 SG |
965 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) { |
966 | *cqe = nvmeq->cqes[nvmeq->cq_head]; | |
adf68f21 | 967 | |
920d13a8 SG |
968 | if (++nvmeq->cq_head == nvmeq->q_depth) { |
969 | nvmeq->cq_head = 0; | |
970 | nvmeq->cq_phase = !nvmeq->cq_phase; | |
b60503ba | 971 | } |
920d13a8 | 972 | return true; |
b60503ba | 973 | } |
920d13a8 | 974 | return false; |
a0fa9647 JA |
975 | } |
976 | ||
977 | static void nvme_process_cq(struct nvme_queue *nvmeq) | |
978 | { | |
920d13a8 SG |
979 | struct nvme_completion cqe; |
980 | int consumed = 0; | |
b60503ba | 981 | |
920d13a8 SG |
982 | while (nvme_read_cqe(nvmeq, &cqe)) { |
983 | nvme_handle_cqe(nvmeq, &cqe); | |
984 | consumed++; | |
920d13a8 | 985 | } |
eb281c82 | 986 | |
e9d8a0fd | 987 | if (consumed) |
920d13a8 | 988 | nvme_ring_cq_doorbell(nvmeq); |
b60503ba MW |
989 | } |
990 | ||
991 | static irqreturn_t nvme_irq(int irq, void *data) | |
58ffacb5 MW |
992 | { |
993 | irqreturn_t result; | |
994 | struct nvme_queue *nvmeq = data; | |
995 | spin_lock(&nvmeq->q_lock); | |
e9539f47 MW |
996 | nvme_process_cq(nvmeq); |
997 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; | |
998 | nvmeq->cqe_seen = 0; | |
58ffacb5 MW |
999 | spin_unlock(&nvmeq->q_lock); |
1000 | return result; | |
1001 | } | |
1002 | ||
1003 | static irqreturn_t nvme_irq_check(int irq, void *data) | |
1004 | { | |
1005 | struct nvme_queue *nvmeq = data; | |
d783e0bd MR |
1006 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) |
1007 | return IRQ_WAKE_THREAD; | |
1008 | return IRQ_NONE; | |
58ffacb5 MW |
1009 | } |
1010 | ||
7776db1c | 1011 | static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag) |
a0fa9647 | 1012 | { |
442e19b7 SG |
1013 | struct nvme_completion cqe; |
1014 | int found = 0, consumed = 0; | |
a0fa9647 | 1015 | |
442e19b7 SG |
1016 | if (!nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) |
1017 | return 0; | |
a0fa9647 | 1018 | |
442e19b7 SG |
1019 | spin_lock_irq(&nvmeq->q_lock); |
1020 | while (nvme_read_cqe(nvmeq, &cqe)) { | |
1021 | nvme_handle_cqe(nvmeq, &cqe); | |
1022 | consumed++; | |
1023 | ||
1024 | if (tag == cqe.command_id) { | |
1025 | found = 1; | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | if (consumed) | |
1031 | nvme_ring_cq_doorbell(nvmeq); | |
1032 | spin_unlock_irq(&nvmeq->q_lock); | |
1033 | ||
1034 | return found; | |
a0fa9647 JA |
1035 | } |
1036 | ||
7776db1c KB |
1037 | static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) |
1038 | { | |
1039 | struct nvme_queue *nvmeq = hctx->driver_data; | |
1040 | ||
1041 | return __nvme_poll(nvmeq, tag); | |
1042 | } | |
1043 | ||
ad22c355 | 1044 | static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl) |
b60503ba | 1045 | { |
f866fc42 | 1046 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
147b27e4 | 1047 | struct nvme_queue *nvmeq = &dev->queues[0]; |
a4aea562 | 1048 | struct nvme_command c; |
b60503ba | 1049 | |
a4aea562 MB |
1050 | memset(&c, 0, sizeof(c)); |
1051 | c.common.opcode = nvme_admin_async_event; | |
ad22c355 | 1052 | c.common.command_id = NVME_AQ_BLK_MQ_DEPTH; |
3c0cf138 | 1053 | |
9396dec9 | 1054 | spin_lock_irq(&nvmeq->q_lock); |
f866fc42 | 1055 | __nvme_submit_cmd(nvmeq, &c); |
9396dec9 | 1056 | spin_unlock_irq(&nvmeq->q_lock); |
f705f837 CH |
1057 | } |
1058 | ||
b60503ba | 1059 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
f705f837 | 1060 | { |
b60503ba MW |
1061 | struct nvme_command c; |
1062 | ||
1063 | memset(&c, 0, sizeof(c)); | |
1064 | c.delete_queue.opcode = opcode; | |
1065 | c.delete_queue.qid = cpu_to_le16(id); | |
1066 | ||
1c63dc66 | 1067 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
1068 | } |
1069 | ||
b60503ba MW |
1070 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, |
1071 | struct nvme_queue *nvmeq) | |
1072 | { | |
b60503ba MW |
1073 | struct nvme_command c; |
1074 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; | |
1075 | ||
d29ec824 | 1076 | /* |
16772ae6 | 1077 | * Note: we (ab)use the fact that the prp fields survive if no data |
d29ec824 CH |
1078 | * is attached to the request. |
1079 | */ | |
b60503ba MW |
1080 | memset(&c, 0, sizeof(c)); |
1081 | c.create_cq.opcode = nvme_admin_create_cq; | |
1082 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); | |
1083 | c.create_cq.cqid = cpu_to_le16(qid); | |
1084 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1085 | c.create_cq.cq_flags = cpu_to_le16(flags); | |
1086 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); | |
1087 | ||
1c63dc66 | 1088 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
1089 | } |
1090 | ||
1091 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, | |
1092 | struct nvme_queue *nvmeq) | |
1093 | { | |
b60503ba | 1094 | struct nvme_command c; |
81c1cd98 | 1095 | int flags = NVME_QUEUE_PHYS_CONTIG; |
b60503ba | 1096 | |
d29ec824 | 1097 | /* |
16772ae6 | 1098 | * Note: we (ab)use the fact that the prp fields survive if no data |
d29ec824 CH |
1099 | * is attached to the request. |
1100 | */ | |
b60503ba MW |
1101 | memset(&c, 0, sizeof(c)); |
1102 | c.create_sq.opcode = nvme_admin_create_sq; | |
1103 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); | |
1104 | c.create_sq.sqid = cpu_to_le16(qid); | |
1105 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); | |
1106 | c.create_sq.sq_flags = cpu_to_le16(flags); | |
1107 | c.create_sq.cqid = cpu_to_le16(qid); | |
1108 | ||
1c63dc66 | 1109 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
b60503ba MW |
1110 | } |
1111 | ||
1112 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) | |
1113 | { | |
1114 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); | |
1115 | } | |
1116 | ||
1117 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) | |
1118 | { | |
1119 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); | |
1120 | } | |
1121 | ||
2a842aca | 1122 | static void abort_endio(struct request *req, blk_status_t error) |
bc5fc7e4 | 1123 | { |
f4800d6d CH |
1124 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
1125 | struct nvme_queue *nvmeq = iod->nvmeq; | |
e44ac588 | 1126 | |
27fa9bc5 CH |
1127 | dev_warn(nvmeq->dev->ctrl.device, |
1128 | "Abort status: 0x%x", nvme_req(req)->status); | |
e7a2a87d | 1129 | atomic_inc(&nvmeq->dev->ctrl.abort_limit); |
e7a2a87d | 1130 | blk_mq_free_request(req); |
bc5fc7e4 MW |
1131 | } |
1132 | ||
b2a0eb1a KB |
1133 | static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) |
1134 | { | |
1135 | ||
1136 | /* If true, indicates loss of adapter communication, possibly by a | |
1137 | * NVMe Subsystem reset. | |
1138 | */ | |
1139 | bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO); | |
1140 | ||
ad70062c JW |
1141 | /* If there is a reset/reinit ongoing, we shouldn't reset again. */ |
1142 | switch (dev->ctrl.state) { | |
1143 | case NVME_CTRL_RESETTING: | |
ad6a0a52 | 1144 | case NVME_CTRL_CONNECTING: |
b2a0eb1a | 1145 | return false; |
ad70062c JW |
1146 | default: |
1147 | break; | |
1148 | } | |
b2a0eb1a KB |
1149 | |
1150 | /* We shouldn't reset unless the controller is on fatal error state | |
1151 | * _or_ if we lost the communication with it. | |
1152 | */ | |
1153 | if (!(csts & NVME_CSTS_CFS) && !nssro) | |
1154 | return false; | |
1155 | ||
1156 | /* If PCI error recovery process is happening, we cannot reset or | |
1157 | * the recovery mechanism will surely fail. | |
1158 | */ | |
1159 | if (pci_channel_offline(to_pci_dev(dev->dev))) | |
1160 | return false; | |
1161 | ||
1162 | return true; | |
1163 | } | |
1164 | ||
1165 | static void nvme_warn_reset(struct nvme_dev *dev, u32 csts) | |
1166 | { | |
1167 | /* Read a config register to help see what died. */ | |
1168 | u16 pci_status; | |
1169 | int result; | |
1170 | ||
1171 | result = pci_read_config_word(to_pci_dev(dev->dev), PCI_STATUS, | |
1172 | &pci_status); | |
1173 | if (result == PCIBIOS_SUCCESSFUL) | |
1174 | dev_warn(dev->ctrl.device, | |
1175 | "controller is down; will reset: CSTS=0x%x, PCI_STATUS=0x%hx\n", | |
1176 | csts, pci_status); | |
1177 | else | |
1178 | dev_warn(dev->ctrl.device, | |
1179 | "controller is down; will reset: CSTS=0x%x, PCI_STATUS read failed (%d)\n", | |
1180 | csts, result); | |
1181 | } | |
1182 | ||
31c7c7d2 | 1183 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
c30341dc | 1184 | { |
f4800d6d CH |
1185 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
1186 | struct nvme_queue *nvmeq = iod->nvmeq; | |
c30341dc | 1187 | struct nvme_dev *dev = nvmeq->dev; |
a4aea562 | 1188 | struct request *abort_req; |
a4aea562 | 1189 | struct nvme_command cmd; |
b2a0eb1a KB |
1190 | u32 csts = readl(dev->bar + NVME_REG_CSTS); |
1191 | ||
1192 | /* | |
1193 | * Reset immediately if the controller is failed | |
1194 | */ | |
1195 | if (nvme_should_reset(dev, csts)) { | |
1196 | nvme_warn_reset(dev, csts); | |
1197 | nvme_dev_disable(dev, false); | |
d86c4d8e | 1198 | nvme_reset_ctrl(&dev->ctrl); |
b2a0eb1a KB |
1199 | return BLK_EH_HANDLED; |
1200 | } | |
c30341dc | 1201 | |
7776db1c KB |
1202 | /* |
1203 | * Did we miss an interrupt? | |
1204 | */ | |
1205 | if (__nvme_poll(nvmeq, req->tag)) { | |
1206 | dev_warn(dev->ctrl.device, | |
1207 | "I/O %d QID %d timeout, completion polled\n", | |
1208 | req->tag, nvmeq->qid); | |
1209 | return BLK_EH_HANDLED; | |
1210 | } | |
1211 | ||
31c7c7d2 | 1212 | /* |
fd634f41 CH |
1213 | * Shutdown immediately if controller times out while starting. The |
1214 | * reset work will see the pci device disabled when it gets the forced | |
1215 | * cancellation error. All outstanding requests are completed on | |
1216 | * shutdown, so we return BLK_EH_HANDLED. | |
1217 | */ | |
4244140d KB |
1218 | switch (dev->ctrl.state) { |
1219 | case NVME_CTRL_CONNECTING: | |
1220 | case NVME_CTRL_RESETTING: | |
1b3c47c1 | 1221 | dev_warn(dev->ctrl.device, |
fd634f41 CH |
1222 | "I/O %d QID %d timeout, disable controller\n", |
1223 | req->tag, nvmeq->qid); | |
a5cdb68c | 1224 | nvme_dev_disable(dev, false); |
27fa9bc5 | 1225 | nvme_req(req)->flags |= NVME_REQ_CANCELLED; |
fd634f41 | 1226 | return BLK_EH_HANDLED; |
4244140d KB |
1227 | default: |
1228 | break; | |
c30341dc KB |
1229 | } |
1230 | ||
fd634f41 CH |
1231 | /* |
1232 | * Shutdown the controller immediately and schedule a reset if the | |
1233 | * command was already aborted once before and still hasn't been | |
1234 | * returned to the driver, or if this is the admin queue. | |
31c7c7d2 | 1235 | */ |
f4800d6d | 1236 | if (!nvmeq->qid || iod->aborted) { |
1b3c47c1 | 1237 | dev_warn(dev->ctrl.device, |
e1569a16 KB |
1238 | "I/O %d QID %d timeout, reset controller\n", |
1239 | req->tag, nvmeq->qid); | |
a5cdb68c | 1240 | nvme_dev_disable(dev, false); |
d86c4d8e | 1241 | nvme_reset_ctrl(&dev->ctrl); |
c30341dc | 1242 | |
e1569a16 KB |
1243 | /* |
1244 | * Mark the request as handled, since the inline shutdown | |
1245 | * forces all outstanding requests to complete. | |
1246 | */ | |
27fa9bc5 | 1247 | nvme_req(req)->flags |= NVME_REQ_CANCELLED; |
e1569a16 | 1248 | return BLK_EH_HANDLED; |
c30341dc | 1249 | } |
c30341dc | 1250 | |
e7a2a87d | 1251 | if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { |
6bf25d16 | 1252 | atomic_inc(&dev->ctrl.abort_limit); |
31c7c7d2 | 1253 | return BLK_EH_RESET_TIMER; |
6bf25d16 | 1254 | } |
7bf7d778 | 1255 | iod->aborted = 1; |
a4aea562 | 1256 | |
c30341dc KB |
1257 | memset(&cmd, 0, sizeof(cmd)); |
1258 | cmd.abort.opcode = nvme_admin_abort_cmd; | |
a4aea562 | 1259 | cmd.abort.cid = req->tag; |
c30341dc | 1260 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
c30341dc | 1261 | |
1b3c47c1 SG |
1262 | dev_warn(nvmeq->dev->ctrl.device, |
1263 | "I/O %d QID %d timeout, aborting\n", | |
1264 | req->tag, nvmeq->qid); | |
e7a2a87d CH |
1265 | |
1266 | abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, | |
eb71f435 | 1267 | BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
e7a2a87d CH |
1268 | if (IS_ERR(abort_req)) { |
1269 | atomic_inc(&dev->ctrl.abort_limit); | |
1270 | return BLK_EH_RESET_TIMER; | |
1271 | } | |
1272 | ||
1273 | abort_req->timeout = ADMIN_TIMEOUT; | |
1274 | abort_req->end_io_data = NULL; | |
1275 | blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); | |
c30341dc | 1276 | |
31c7c7d2 CH |
1277 | /* |
1278 | * The aborted req will be completed on receiving the abort req. | |
1279 | * We enable the timer again. If hit twice, it'll cause a device reset, | |
1280 | * as the device then is in a faulty state. | |
1281 | */ | |
1282 | return BLK_EH_RESET_TIMER; | |
c30341dc KB |
1283 | } |
1284 | ||
a4aea562 MB |
1285 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
1286 | { | |
9e866774 MW |
1287 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
1288 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); | |
8ffaadf7 JD |
1289 | if (nvmeq->sq_cmds) |
1290 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), | |
9e866774 | 1291 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); |
9e866774 MW |
1292 | } |
1293 | ||
a1a5ef99 | 1294 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
22404274 KB |
1295 | { |
1296 | int i; | |
1297 | ||
d858e5f0 | 1298 | for (i = dev->ctrl.queue_count - 1; i >= lowest; i--) { |
d858e5f0 | 1299 | dev->ctrl.queue_count--; |
147b27e4 | 1300 | nvme_free_queue(&dev->queues[i]); |
121c7ad4 | 1301 | } |
22404274 KB |
1302 | } |
1303 | ||
4d115420 KB |
1304 | /** |
1305 | * nvme_suspend_queue - put queue into suspended state | |
1306 | * @nvmeq - queue to suspend | |
4d115420 KB |
1307 | */ |
1308 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) | |
b60503ba | 1309 | { |
2b25d981 | 1310 | int vector; |
b60503ba | 1311 | |
a09115b2 | 1312 | spin_lock_irq(&nvmeq->q_lock); |
2b25d981 KB |
1313 | if (nvmeq->cq_vector == -1) { |
1314 | spin_unlock_irq(&nvmeq->q_lock); | |
1315 | return 1; | |
1316 | } | |
0ff199cb | 1317 | vector = nvmeq->cq_vector; |
42f61420 | 1318 | nvmeq->dev->online_queues--; |
2b25d981 | 1319 | nvmeq->cq_vector = -1; |
a09115b2 MW |
1320 | spin_unlock_irq(&nvmeq->q_lock); |
1321 | ||
1c63dc66 | 1322 | if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) |
c81545f9 | 1323 | blk_mq_quiesce_queue(nvmeq->dev->ctrl.admin_q); |
6df3dbc8 | 1324 | |
0ff199cb | 1325 | pci_free_irq(to_pci_dev(nvmeq->dev->dev), vector, nvmeq); |
b60503ba | 1326 | |
4d115420 KB |
1327 | return 0; |
1328 | } | |
b60503ba | 1329 | |
a5cdb68c | 1330 | static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) |
4d115420 | 1331 | { |
147b27e4 | 1332 | struct nvme_queue *nvmeq = &dev->queues[0]; |
4d115420 | 1333 | |
a5cdb68c KB |
1334 | if (shutdown) |
1335 | nvme_shutdown_ctrl(&dev->ctrl); | |
1336 | else | |
20d0dfe6 | 1337 | nvme_disable_ctrl(&dev->ctrl, dev->ctrl.cap); |
07836e65 KB |
1338 | |
1339 | spin_lock_irq(&nvmeq->q_lock); | |
1340 | nvme_process_cq(nvmeq); | |
1341 | spin_unlock_irq(&nvmeq->q_lock); | |
b60503ba MW |
1342 | } |
1343 | ||
8ffaadf7 JD |
1344 | static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, |
1345 | int entry_size) | |
1346 | { | |
1347 | int q_depth = dev->q_depth; | |
5fd4ce1b CH |
1348 | unsigned q_size_aligned = roundup(q_depth * entry_size, |
1349 | dev->ctrl.page_size); | |
8ffaadf7 JD |
1350 | |
1351 | if (q_size_aligned * nr_io_queues > dev->cmb_size) { | |
c45f5c99 | 1352 | u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); |
5fd4ce1b | 1353 | mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); |
c45f5c99 | 1354 | q_depth = div_u64(mem_per_q, entry_size); |
8ffaadf7 JD |
1355 | |
1356 | /* | |
1357 | * Ensure the reduced q_depth is above some threshold where it | |
1358 | * would be better to map queues in system memory with the | |
1359 | * original depth | |
1360 | */ | |
1361 | if (q_depth < 64) | |
1362 | return -ENOMEM; | |
1363 | } | |
1364 | ||
1365 | return q_depth; | |
1366 | } | |
1367 | ||
1368 | static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, | |
1369 | int qid, int depth) | |
1370 | { | |
815c6704 KB |
1371 | /* CMB SQEs will be mapped before creation */ |
1372 | if (qid && dev->cmb && use_cmb_sqes && (dev->cmbsz & NVME_CMBSZ_SQS)) | |
1373 | return 0; | |
8ffaadf7 | 1374 | |
815c6704 KB |
1375 | nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), |
1376 | &nvmeq->sq_dma_addr, GFP_KERNEL); | |
1377 | if (!nvmeq->sq_cmds) | |
1378 | return -ENOMEM; | |
8ffaadf7 JD |
1379 | return 0; |
1380 | } | |
1381 | ||
147b27e4 SG |
1382 | static int nvme_alloc_queue(struct nvme_dev *dev, int qid, |
1383 | int depth, int node) | |
b60503ba | 1384 | { |
147b27e4 | 1385 | struct nvme_queue *nvmeq = &dev->queues[qid]; |
b60503ba | 1386 | |
62314e40 KB |
1387 | if (dev->ctrl.queue_count > qid) |
1388 | return 0; | |
b60503ba | 1389 | |
e75ec752 | 1390 | nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), |
4d51abf9 | 1391 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
b60503ba MW |
1392 | if (!nvmeq->cqes) |
1393 | goto free_nvmeq; | |
b60503ba | 1394 | |
8ffaadf7 | 1395 | if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) |
b60503ba MW |
1396 | goto free_cqdma; |
1397 | ||
e75ec752 | 1398 | nvmeq->q_dmadev = dev->dev; |
091b6092 | 1399 | nvmeq->dev = dev; |
b60503ba MW |
1400 | spin_lock_init(&nvmeq->q_lock); |
1401 | nvmeq->cq_head = 0; | |
82123460 | 1402 | nvmeq->cq_phase = 1; |
b80d5ccc | 1403 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
b60503ba | 1404 | nvmeq->q_depth = depth; |
c30341dc | 1405 | nvmeq->qid = qid; |
758dd7fd | 1406 | nvmeq->cq_vector = -1; |
d858e5f0 | 1407 | dev->ctrl.queue_count++; |
36a7e993 | 1408 | |
147b27e4 | 1409 | return 0; |
b60503ba MW |
1410 | |
1411 | free_cqdma: | |
e75ec752 | 1412 | dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
b60503ba MW |
1413 | nvmeq->cq_dma_addr); |
1414 | free_nvmeq: | |
147b27e4 | 1415 | return -ENOMEM; |
b60503ba MW |
1416 | } |
1417 | ||
dca51e78 | 1418 | static int queue_request_irq(struct nvme_queue *nvmeq) |
3001082c | 1419 | { |
0ff199cb CH |
1420 | struct pci_dev *pdev = to_pci_dev(nvmeq->dev->dev); |
1421 | int nr = nvmeq->dev->ctrl.instance; | |
1422 | ||
1423 | if (use_threaded_interrupts) { | |
1424 | return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq_check, | |
1425 | nvme_irq, nvmeq, "nvme%dq%d", nr, nvmeq->qid); | |
1426 | } else { | |
1427 | return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq, | |
1428 | NULL, nvmeq, "nvme%dq%d", nr, nvmeq->qid); | |
1429 | } | |
3001082c MW |
1430 | } |
1431 | ||
22404274 | 1432 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
b60503ba | 1433 | { |
22404274 | 1434 | struct nvme_dev *dev = nvmeq->dev; |
b60503ba | 1435 | |
7be50e93 | 1436 | spin_lock_irq(&nvmeq->q_lock); |
22404274 KB |
1437 | nvmeq->sq_tail = 0; |
1438 | nvmeq->cq_head = 0; | |
1439 | nvmeq->cq_phase = 1; | |
b80d5ccc | 1440 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
22404274 | 1441 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
f9f38e33 | 1442 | nvme_dbbuf_init(dev, nvmeq, qid); |
42f61420 | 1443 | dev->online_queues++; |
7be50e93 | 1444 | spin_unlock_irq(&nvmeq->q_lock); |
22404274 KB |
1445 | } |
1446 | ||
1447 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) | |
1448 | { | |
1449 | struct nvme_dev *dev = nvmeq->dev; | |
1450 | int result; | |
3f85d50b | 1451 | |
815c6704 KB |
1452 | if (dev->cmb && use_cmb_sqes && (dev->cmbsz & NVME_CMBSZ_SQS)) { |
1453 | unsigned offset = (qid - 1) * roundup(SQ_SIZE(nvmeq->q_depth), | |
1454 | dev->ctrl.page_size); | |
1455 | nvmeq->sq_dma_addr = dev->cmb_bus_addr + offset; | |
1456 | nvmeq->sq_cmds_io = dev->cmb + offset; | |
1457 | } | |
1458 | ||
2b25d981 | 1459 | nvmeq->cq_vector = qid - 1; |
b60503ba MW |
1460 | result = adapter_alloc_cq(dev, qid, nvmeq); |
1461 | if (result < 0) | |
f25a2dfc | 1462 | goto release_vector; |
b60503ba MW |
1463 | |
1464 | result = adapter_alloc_sq(dev, qid, nvmeq); | |
1465 | if (result < 0) | |
1466 | goto release_cq; | |
1467 | ||
161b8be2 | 1468 | nvme_init_queue(nvmeq, qid); |
dca51e78 | 1469 | result = queue_request_irq(nvmeq); |
b60503ba MW |
1470 | if (result < 0) |
1471 | goto release_sq; | |
1472 | ||
22404274 | 1473 | return result; |
b60503ba MW |
1474 | |
1475 | release_sq: | |
f25a2dfc | 1476 | dev->online_queues--; |
b60503ba MW |
1477 | adapter_delete_sq(dev, qid); |
1478 | release_cq: | |
1479 | adapter_delete_cq(dev, qid); | |
f25a2dfc JW |
1480 | release_vector: |
1481 | nvmeq->cq_vector = -1; | |
22404274 | 1482 | return result; |
b60503ba MW |
1483 | } |
1484 | ||
f363b089 | 1485 | static const struct blk_mq_ops nvme_mq_admin_ops = { |
d29ec824 | 1486 | .queue_rq = nvme_queue_rq, |
77f02a7a | 1487 | .complete = nvme_pci_complete_rq, |
a4aea562 | 1488 | .init_hctx = nvme_admin_init_hctx, |
4af0e21c | 1489 | .exit_hctx = nvme_admin_exit_hctx, |
0350815a | 1490 | .init_request = nvme_init_request, |
a4aea562 MB |
1491 | .timeout = nvme_timeout, |
1492 | }; | |
1493 | ||
f363b089 | 1494 | static const struct blk_mq_ops nvme_mq_ops = { |
a4aea562 | 1495 | .queue_rq = nvme_queue_rq, |
77f02a7a | 1496 | .complete = nvme_pci_complete_rq, |
a4aea562 MB |
1497 | .init_hctx = nvme_init_hctx, |
1498 | .init_request = nvme_init_request, | |
dca51e78 | 1499 | .map_queues = nvme_pci_map_queues, |
a4aea562 | 1500 | .timeout = nvme_timeout, |
a0fa9647 | 1501 | .poll = nvme_poll, |
a4aea562 MB |
1502 | }; |
1503 | ||
ea191d2f KB |
1504 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
1505 | { | |
1c63dc66 | 1506 | if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { |
69d9a99c KB |
1507 | /* |
1508 | * If the controller was reset during removal, it's possible | |
1509 | * user requests may be waiting on a stopped queue. Start the | |
1510 | * queue to flush these to completion. | |
1511 | */ | |
c81545f9 | 1512 | blk_mq_unquiesce_queue(dev->ctrl.admin_q); |
1c63dc66 | 1513 | blk_cleanup_queue(dev->ctrl.admin_q); |
ea191d2f KB |
1514 | blk_mq_free_tag_set(&dev->admin_tagset); |
1515 | } | |
1516 | } | |
1517 | ||
a4aea562 MB |
1518 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
1519 | { | |
1c63dc66 | 1520 | if (!dev->ctrl.admin_q) { |
a4aea562 MB |
1521 | dev->admin_tagset.ops = &nvme_mq_admin_ops; |
1522 | dev->admin_tagset.nr_hw_queues = 1; | |
e3e9d50c | 1523 | |
38dabe21 | 1524 | dev->admin_tagset.queue_depth = NVME_AQ_MQ_TAG_DEPTH; |
a4aea562 | 1525 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
e75ec752 | 1526 | dev->admin_tagset.numa_node = dev_to_node(dev->dev); |
a7a7cbe3 | 1527 | dev->admin_tagset.cmd_size = nvme_pci_cmd_size(dev, false); |
d3484991 | 1528 | dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED; |
a4aea562 MB |
1529 | dev->admin_tagset.driver_data = dev; |
1530 | ||
1531 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) | |
1532 | return -ENOMEM; | |
34b6c231 | 1533 | dev->ctrl.admin_tagset = &dev->admin_tagset; |
a4aea562 | 1534 | |
1c63dc66 CH |
1535 | dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); |
1536 | if (IS_ERR(dev->ctrl.admin_q)) { | |
a4aea562 MB |
1537 | blk_mq_free_tag_set(&dev->admin_tagset); |
1538 | return -ENOMEM; | |
1539 | } | |
1c63dc66 | 1540 | if (!blk_get_queue(dev->ctrl.admin_q)) { |
ea191d2f | 1541 | nvme_dev_remove_admin(dev); |
1c63dc66 | 1542 | dev->ctrl.admin_q = NULL; |
ea191d2f KB |
1543 | return -ENODEV; |
1544 | } | |
0fb59cbc | 1545 | } else |
c81545f9 | 1546 | blk_mq_unquiesce_queue(dev->ctrl.admin_q); |
a4aea562 MB |
1547 | |
1548 | return 0; | |
1549 | } | |
1550 | ||
97f6ef64 XY |
1551 | static unsigned long db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
1552 | { | |
1553 | return NVME_REG_DBS + ((nr_io_queues + 1) * 8 * dev->db_stride); | |
1554 | } | |
1555 | ||
1556 | static int nvme_remap_bar(struct nvme_dev *dev, unsigned long size) | |
1557 | { | |
1558 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
1559 | ||
1560 | if (size <= dev->bar_mapped_size) | |
1561 | return 0; | |
1562 | if (size > pci_resource_len(pdev, 0)) | |
1563 | return -ENOMEM; | |
1564 | if (dev->bar) | |
1565 | iounmap(dev->bar); | |
1566 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); | |
1567 | if (!dev->bar) { | |
1568 | dev->bar_mapped_size = 0; | |
1569 | return -ENOMEM; | |
1570 | } | |
1571 | dev->bar_mapped_size = size; | |
1572 | dev->dbs = dev->bar + NVME_REG_DBS; | |
1573 | ||
1574 | return 0; | |
1575 | } | |
1576 | ||
01ad0990 | 1577 | static int nvme_pci_configure_admin_queue(struct nvme_dev *dev) |
b60503ba | 1578 | { |
ba47e386 | 1579 | int result; |
b60503ba MW |
1580 | u32 aqa; |
1581 | struct nvme_queue *nvmeq; | |
1582 | ||
97f6ef64 XY |
1583 | result = nvme_remap_bar(dev, db_bar_size(dev, 0)); |
1584 | if (result < 0) | |
1585 | return result; | |
1586 | ||
8ef2074d | 1587 | dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1, 0) ? |
20d0dfe6 | 1588 | NVME_CAP_NSSRC(dev->ctrl.cap) : 0; |
dfbac8c7 | 1589 | |
7a67cbea CH |
1590 | if (dev->subsystem && |
1591 | (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) | |
1592 | writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); | |
dfbac8c7 | 1593 | |
20d0dfe6 | 1594 | result = nvme_disable_ctrl(&dev->ctrl, dev->ctrl.cap); |
ba47e386 MW |
1595 | if (result < 0) |
1596 | return result; | |
b60503ba | 1597 | |
147b27e4 SG |
1598 | result = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH, |
1599 | dev_to_node(dev->dev)); | |
1600 | if (result) | |
1601 | return result; | |
b60503ba | 1602 | |
147b27e4 | 1603 | nvmeq = &dev->queues[0]; |
b60503ba MW |
1604 | aqa = nvmeq->q_depth - 1; |
1605 | aqa |= aqa << 16; | |
1606 | ||
7a67cbea CH |
1607 | writel(aqa, dev->bar + NVME_REG_AQA); |
1608 | lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); | |
1609 | lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); | |
b60503ba | 1610 | |
20d0dfe6 | 1611 | result = nvme_enable_ctrl(&dev->ctrl, dev->ctrl.cap); |
025c557a | 1612 | if (result) |
d4875622 | 1613 | return result; |
a4aea562 | 1614 | |
2b25d981 | 1615 | nvmeq->cq_vector = 0; |
161b8be2 | 1616 | nvme_init_queue(nvmeq, 0); |
dca51e78 | 1617 | result = queue_request_irq(nvmeq); |
758dd7fd JD |
1618 | if (result) { |
1619 | nvmeq->cq_vector = -1; | |
d4875622 | 1620 | return result; |
758dd7fd | 1621 | } |
025c557a | 1622 | |
b60503ba MW |
1623 | return result; |
1624 | } | |
1625 | ||
749941f2 | 1626 | static int nvme_create_io_queues(struct nvme_dev *dev) |
42f61420 | 1627 | { |
949928c1 | 1628 | unsigned i, max; |
749941f2 | 1629 | int ret = 0; |
42f61420 | 1630 | |
d858e5f0 | 1631 | for (i = dev->ctrl.queue_count; i <= dev->max_qid; i++) { |
d3af3ecd | 1632 | /* vector == qid - 1, match nvme_create_queue */ |
147b27e4 | 1633 | if (nvme_alloc_queue(dev, i, dev->q_depth, |
d3af3ecd | 1634 | pci_irq_get_node(to_pci_dev(dev->dev), i - 1))) { |
749941f2 | 1635 | ret = -ENOMEM; |
42f61420 | 1636 | break; |
749941f2 CH |
1637 | } |
1638 | } | |
42f61420 | 1639 | |
d858e5f0 | 1640 | max = min(dev->max_qid, dev->ctrl.queue_count - 1); |
949928c1 | 1641 | for (i = dev->online_queues; i <= max; i++) { |
147b27e4 | 1642 | ret = nvme_create_queue(&dev->queues[i], i); |
d4875622 | 1643 | if (ret) |
42f61420 | 1644 | break; |
27e8166c | 1645 | } |
749941f2 CH |
1646 | |
1647 | /* | |
1648 | * Ignore failing Create SQ/CQ commands, we can continue with less | |
8adb8c14 MI |
1649 | * than the desired amount of queues, and even a controller without |
1650 | * I/O queues can still be used to issue admin commands. This might | |
749941f2 CH |
1651 | * be useful to upgrade a buggy firmware for example. |
1652 | */ | |
1653 | return ret >= 0 ? 0 : ret; | |
b60503ba MW |
1654 | } |
1655 | ||
202021c1 SB |
1656 | static ssize_t nvme_cmb_show(struct device *dev, |
1657 | struct device_attribute *attr, | |
1658 | char *buf) | |
1659 | { | |
1660 | struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev)); | |
1661 | ||
c965809c | 1662 | return scnprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz : x%08x\n", |
202021c1 SB |
1663 | ndev->cmbloc, ndev->cmbsz); |
1664 | } | |
1665 | static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL); | |
1666 | ||
88de4598 | 1667 | static u64 nvme_cmb_size_unit(struct nvme_dev *dev) |
8ffaadf7 | 1668 | { |
88de4598 CH |
1669 | u8 szu = (dev->cmbsz >> NVME_CMBSZ_SZU_SHIFT) & NVME_CMBSZ_SZU_MASK; |
1670 | ||
1671 | return 1ULL << (12 + 4 * szu); | |
1672 | } | |
1673 | ||
1674 | static u32 nvme_cmb_size(struct nvme_dev *dev) | |
1675 | { | |
1676 | return (dev->cmbsz >> NVME_CMBSZ_SZ_SHIFT) & NVME_CMBSZ_SZ_MASK; | |
1677 | } | |
1678 | ||
f65efd6d | 1679 | static void nvme_map_cmb(struct nvme_dev *dev) |
8ffaadf7 | 1680 | { |
88de4598 | 1681 | u64 size, offset; |
8ffaadf7 JD |
1682 | resource_size_t bar_size; |
1683 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
8969f1f8 | 1684 | int bar; |
8ffaadf7 | 1685 | |
7a67cbea | 1686 | dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); |
f65efd6d CH |
1687 | if (!dev->cmbsz) |
1688 | return; | |
202021c1 | 1689 | dev->cmbloc = readl(dev->bar + NVME_REG_CMBLOC); |
8ffaadf7 | 1690 | |
202021c1 | 1691 | if (!use_cmb_sqes) |
f65efd6d | 1692 | return; |
8ffaadf7 | 1693 | |
88de4598 CH |
1694 | size = nvme_cmb_size_unit(dev) * nvme_cmb_size(dev); |
1695 | offset = nvme_cmb_size_unit(dev) * NVME_CMB_OFST(dev->cmbloc); | |
8969f1f8 CH |
1696 | bar = NVME_CMB_BIR(dev->cmbloc); |
1697 | bar_size = pci_resource_len(pdev, bar); | |
8ffaadf7 JD |
1698 | |
1699 | if (offset > bar_size) | |
f65efd6d | 1700 | return; |
8ffaadf7 JD |
1701 | |
1702 | /* | |
1703 | * Controllers may support a CMB size larger than their BAR, | |
1704 | * for example, due to being behind a bridge. Reduce the CMB to | |
1705 | * the reported size of the BAR | |
1706 | */ | |
1707 | if (size > bar_size - offset) | |
1708 | size = bar_size - offset; | |
1709 | ||
f65efd6d CH |
1710 | dev->cmb = ioremap_wc(pci_resource_start(pdev, bar) + offset, size); |
1711 | if (!dev->cmb) | |
1712 | return; | |
8969f1f8 | 1713 | dev->cmb_bus_addr = pci_bus_address(pdev, bar) + offset; |
8ffaadf7 | 1714 | dev->cmb_size = size; |
f65efd6d CH |
1715 | |
1716 | if (sysfs_add_file_to_group(&dev->ctrl.device->kobj, | |
1717 | &dev_attr_cmb.attr, NULL)) | |
1718 | dev_warn(dev->ctrl.device, | |
1719 | "failed to add sysfs attribute for CMB\n"); | |
8ffaadf7 JD |
1720 | } |
1721 | ||
1722 | static inline void nvme_release_cmb(struct nvme_dev *dev) | |
1723 | { | |
1724 | if (dev->cmb) { | |
1725 | iounmap(dev->cmb); | |
1726 | dev->cmb = NULL; | |
1c78f773 MG |
1727 | sysfs_remove_file_from_group(&dev->ctrl.device->kobj, |
1728 | &dev_attr_cmb.attr, NULL); | |
1729 | dev->cmbsz = 0; | |
8ffaadf7 JD |
1730 | } |
1731 | } | |
1732 | ||
87ad72a5 CH |
1733 | static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits) |
1734 | { | |
4033f35d | 1735 | u64 dma_addr = dev->host_mem_descs_dma; |
87ad72a5 | 1736 | struct nvme_command c; |
87ad72a5 CH |
1737 | int ret; |
1738 | ||
87ad72a5 CH |
1739 | memset(&c, 0, sizeof(c)); |
1740 | c.features.opcode = nvme_admin_set_features; | |
1741 | c.features.fid = cpu_to_le32(NVME_FEAT_HOST_MEM_BUF); | |
1742 | c.features.dword11 = cpu_to_le32(bits); | |
1743 | c.features.dword12 = cpu_to_le32(dev->host_mem_size >> | |
1744 | ilog2(dev->ctrl.page_size)); | |
1745 | c.features.dword13 = cpu_to_le32(lower_32_bits(dma_addr)); | |
1746 | c.features.dword14 = cpu_to_le32(upper_32_bits(dma_addr)); | |
1747 | c.features.dword15 = cpu_to_le32(dev->nr_host_mem_descs); | |
1748 | ||
1749 | ret = nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); | |
1750 | if (ret) { | |
1751 | dev_warn(dev->ctrl.device, | |
1752 | "failed to set host mem (err %d, flags %#x).\n", | |
1753 | ret, bits); | |
1754 | } | |
87ad72a5 CH |
1755 | return ret; |
1756 | } | |
1757 | ||
1758 | static void nvme_free_host_mem(struct nvme_dev *dev) | |
1759 | { | |
1760 | int i; | |
1761 | ||
1762 | for (i = 0; i < dev->nr_host_mem_descs; i++) { | |
1763 | struct nvme_host_mem_buf_desc *desc = &dev->host_mem_descs[i]; | |
1764 | size_t size = le32_to_cpu(desc->size) * dev->ctrl.page_size; | |
1765 | ||
1766 | dma_free_coherent(dev->dev, size, dev->host_mem_desc_bufs[i], | |
1767 | le64_to_cpu(desc->addr)); | |
1768 | } | |
1769 | ||
1770 | kfree(dev->host_mem_desc_bufs); | |
1771 | dev->host_mem_desc_bufs = NULL; | |
4033f35d CH |
1772 | dma_free_coherent(dev->dev, |
1773 | dev->nr_host_mem_descs * sizeof(*dev->host_mem_descs), | |
1774 | dev->host_mem_descs, dev->host_mem_descs_dma); | |
87ad72a5 | 1775 | dev->host_mem_descs = NULL; |
7e5dd57e | 1776 | dev->nr_host_mem_descs = 0; |
87ad72a5 CH |
1777 | } |
1778 | ||
92dc6895 CH |
1779 | static int __nvme_alloc_host_mem(struct nvme_dev *dev, u64 preferred, |
1780 | u32 chunk_size) | |
9d713c2b | 1781 | { |
87ad72a5 | 1782 | struct nvme_host_mem_buf_desc *descs; |
92dc6895 | 1783 | u32 max_entries, len; |
4033f35d | 1784 | dma_addr_t descs_dma; |
2ee0e4ed | 1785 | int i = 0; |
87ad72a5 | 1786 | void **bufs; |
6fbcde66 | 1787 | u64 size, tmp; |
87ad72a5 | 1788 | |
87ad72a5 CH |
1789 | tmp = (preferred + chunk_size - 1); |
1790 | do_div(tmp, chunk_size); | |
1791 | max_entries = tmp; | |
044a9df1 CH |
1792 | |
1793 | if (dev->ctrl.hmmaxd && dev->ctrl.hmmaxd < max_entries) | |
1794 | max_entries = dev->ctrl.hmmaxd; | |
1795 | ||
4033f35d CH |
1796 | descs = dma_zalloc_coherent(dev->dev, max_entries * sizeof(*descs), |
1797 | &descs_dma, GFP_KERNEL); | |
87ad72a5 CH |
1798 | if (!descs) |
1799 | goto out; | |
1800 | ||
1801 | bufs = kcalloc(max_entries, sizeof(*bufs), GFP_KERNEL); | |
1802 | if (!bufs) | |
1803 | goto out_free_descs; | |
1804 | ||
244a8fe4 | 1805 | for (size = 0; size < preferred && i < max_entries; size += len) { |
87ad72a5 CH |
1806 | dma_addr_t dma_addr; |
1807 | ||
50cdb7c6 | 1808 | len = min_t(u64, chunk_size, preferred - size); |
87ad72a5 CH |
1809 | bufs[i] = dma_alloc_attrs(dev->dev, len, &dma_addr, GFP_KERNEL, |
1810 | DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN); | |
1811 | if (!bufs[i]) | |
1812 | break; | |
1813 | ||
1814 | descs[i].addr = cpu_to_le64(dma_addr); | |
1815 | descs[i].size = cpu_to_le32(len / dev->ctrl.page_size); | |
1816 | i++; | |
1817 | } | |
1818 | ||
92dc6895 | 1819 | if (!size) |
87ad72a5 | 1820 | goto out_free_bufs; |
87ad72a5 | 1821 | |
87ad72a5 CH |
1822 | dev->nr_host_mem_descs = i; |
1823 | dev->host_mem_size = size; | |
1824 | dev->host_mem_descs = descs; | |
4033f35d | 1825 | dev->host_mem_descs_dma = descs_dma; |
87ad72a5 CH |
1826 | dev->host_mem_desc_bufs = bufs; |
1827 | return 0; | |
1828 | ||
1829 | out_free_bufs: | |
1830 | while (--i >= 0) { | |
1831 | size_t size = le32_to_cpu(descs[i].size) * dev->ctrl.page_size; | |
1832 | ||
1833 | dma_free_coherent(dev->dev, size, bufs[i], | |
1834 | le64_to_cpu(descs[i].addr)); | |
1835 | } | |
1836 | ||
1837 | kfree(bufs); | |
1838 | out_free_descs: | |
4033f35d CH |
1839 | dma_free_coherent(dev->dev, max_entries * sizeof(*descs), descs, |
1840 | descs_dma); | |
87ad72a5 | 1841 | out: |
87ad72a5 CH |
1842 | dev->host_mem_descs = NULL; |
1843 | return -ENOMEM; | |
1844 | } | |
1845 | ||
92dc6895 CH |
1846 | static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred) |
1847 | { | |
1848 | u32 chunk_size; | |
1849 | ||
1850 | /* start big and work our way down */ | |
30f92d62 | 1851 | for (chunk_size = min_t(u64, preferred, PAGE_SIZE * MAX_ORDER_NR_PAGES); |
044a9df1 | 1852 | chunk_size >= max_t(u32, dev->ctrl.hmminds * 4096, PAGE_SIZE * 2); |
92dc6895 CH |
1853 | chunk_size /= 2) { |
1854 | if (!__nvme_alloc_host_mem(dev, preferred, chunk_size)) { | |
1855 | if (!min || dev->host_mem_size >= min) | |
1856 | return 0; | |
1857 | nvme_free_host_mem(dev); | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | return -ENOMEM; | |
1862 | } | |
1863 | ||
9620cfba | 1864 | static int nvme_setup_host_mem(struct nvme_dev *dev) |
87ad72a5 CH |
1865 | { |
1866 | u64 max = (u64)max_host_mem_size_mb * SZ_1M; | |
1867 | u64 preferred = (u64)dev->ctrl.hmpre * 4096; | |
1868 | u64 min = (u64)dev->ctrl.hmmin * 4096; | |
1869 | u32 enable_bits = NVME_HOST_MEM_ENABLE; | |
6fbcde66 | 1870 | int ret; |
87ad72a5 CH |
1871 | |
1872 | preferred = min(preferred, max); | |
1873 | if (min > max) { | |
1874 | dev_warn(dev->ctrl.device, | |
1875 | "min host memory (%lld MiB) above limit (%d MiB).\n", | |
1876 | min >> ilog2(SZ_1M), max_host_mem_size_mb); | |
1877 | nvme_free_host_mem(dev); | |
9620cfba | 1878 | return 0; |
87ad72a5 CH |
1879 | } |
1880 | ||
1881 | /* | |
1882 | * If we already have a buffer allocated check if we can reuse it. | |
1883 | */ | |
1884 | if (dev->host_mem_descs) { | |
1885 | if (dev->host_mem_size >= min) | |
1886 | enable_bits |= NVME_HOST_MEM_RETURN; | |
1887 | else | |
1888 | nvme_free_host_mem(dev); | |
1889 | } | |
1890 | ||
1891 | if (!dev->host_mem_descs) { | |
92dc6895 CH |
1892 | if (nvme_alloc_host_mem(dev, min, preferred)) { |
1893 | dev_warn(dev->ctrl.device, | |
1894 | "failed to allocate host memory buffer.\n"); | |
9620cfba | 1895 | return 0; /* controller must work without HMB */ |
92dc6895 CH |
1896 | } |
1897 | ||
1898 | dev_info(dev->ctrl.device, | |
1899 | "allocated %lld MiB host memory buffer.\n", | |
1900 | dev->host_mem_size >> ilog2(SZ_1M)); | |
87ad72a5 CH |
1901 | } |
1902 | ||
9620cfba CH |
1903 | ret = nvme_set_host_mem(dev, enable_bits); |
1904 | if (ret) | |
87ad72a5 | 1905 | nvme_free_host_mem(dev); |
9620cfba | 1906 | return ret; |
9d713c2b KB |
1907 | } |
1908 | ||
8d85fce7 | 1909 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
b60503ba | 1910 | { |
147b27e4 | 1911 | struct nvme_queue *adminq = &dev->queues[0]; |
e75ec752 | 1912 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
97f6ef64 XY |
1913 | int result, nr_io_queues; |
1914 | unsigned long size; | |
b60503ba | 1915 | |
425a17cb | 1916 | nr_io_queues = num_present_cpus(); |
9a0be7ab CH |
1917 | result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); |
1918 | if (result < 0) | |
1b23484b | 1919 | return result; |
9a0be7ab | 1920 | |
f5fa90dc | 1921 | if (nr_io_queues == 0) |
a5229050 | 1922 | return 0; |
b60503ba | 1923 | |
88de4598 | 1924 | if (dev->cmb && (dev->cmbsz & NVME_CMBSZ_SQS)) { |
8ffaadf7 JD |
1925 | result = nvme_cmb_qdepth(dev, nr_io_queues, |
1926 | sizeof(struct nvme_command)); | |
1927 | if (result > 0) | |
1928 | dev->q_depth = result; | |
1929 | else | |
1930 | nvme_release_cmb(dev); | |
1931 | } | |
1932 | ||
97f6ef64 XY |
1933 | do { |
1934 | size = db_bar_size(dev, nr_io_queues); | |
1935 | result = nvme_remap_bar(dev, size); | |
1936 | if (!result) | |
1937 | break; | |
1938 | if (!--nr_io_queues) | |
1939 | return -ENOMEM; | |
1940 | } while (1); | |
1941 | adminq->q_db = dev->dbs; | |
f1938f6e | 1942 | |
9d713c2b | 1943 | /* Deregister the admin queue's interrupt */ |
0ff199cb | 1944 | pci_free_irq(pdev, 0, adminq); |
9d713c2b | 1945 | |
e32efbfc JA |
1946 | /* |
1947 | * If we enable msix early due to not intx, disable it again before | |
1948 | * setting up the full range we need. | |
1949 | */ | |
dca51e78 CH |
1950 | pci_free_irq_vectors(pdev); |
1951 | nr_io_queues = pci_alloc_irq_vectors(pdev, 1, nr_io_queues, | |
1952 | PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY); | |
1953 | if (nr_io_queues <= 0) | |
1954 | return -EIO; | |
1955 | dev->max_qid = nr_io_queues; | |
fa08a396 | 1956 | |
063a8096 MW |
1957 | /* |
1958 | * Should investigate if there's a performance win from allocating | |
1959 | * more queues than interrupt vectors; it might allow the submission | |
1960 | * path to scale better, even if the receive path is limited by the | |
1961 | * number of interrupts. | |
1962 | */ | |
063a8096 | 1963 | |
dca51e78 | 1964 | result = queue_request_irq(adminq); |
758dd7fd JD |
1965 | if (result) { |
1966 | adminq->cq_vector = -1; | |
d4875622 | 1967 | return result; |
758dd7fd | 1968 | } |
749941f2 | 1969 | return nvme_create_io_queues(dev); |
b60503ba MW |
1970 | } |
1971 | ||
2a842aca | 1972 | static void nvme_del_queue_end(struct request *req, blk_status_t error) |
a5768aa8 | 1973 | { |
db3cbfff | 1974 | struct nvme_queue *nvmeq = req->end_io_data; |
b5875222 | 1975 | |
db3cbfff KB |
1976 | blk_mq_free_request(req); |
1977 | complete(&nvmeq->dev->ioq_wait); | |
a5768aa8 KB |
1978 | } |
1979 | ||
2a842aca | 1980 | static void nvme_del_cq_end(struct request *req, blk_status_t error) |
a5768aa8 | 1981 | { |
db3cbfff | 1982 | struct nvme_queue *nvmeq = req->end_io_data; |
a5768aa8 | 1983 | |
db3cbfff KB |
1984 | if (!error) { |
1985 | unsigned long flags; | |
1986 | ||
2e39e0f6 ML |
1987 | /* |
1988 | * We might be called with the AQ q_lock held | |
1989 | * and the I/O queue q_lock should always | |
1990 | * nest inside the AQ one. | |
1991 | */ | |
1992 | spin_lock_irqsave_nested(&nvmeq->q_lock, flags, | |
1993 | SINGLE_DEPTH_NESTING); | |
db3cbfff KB |
1994 | nvme_process_cq(nvmeq); |
1995 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); | |
a5768aa8 | 1996 | } |
db3cbfff KB |
1997 | |
1998 | nvme_del_queue_end(req, error); | |
a5768aa8 KB |
1999 | } |
2000 | ||
db3cbfff | 2001 | static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) |
bda4e0fb | 2002 | { |
db3cbfff KB |
2003 | struct request_queue *q = nvmeq->dev->ctrl.admin_q; |
2004 | struct request *req; | |
2005 | struct nvme_command cmd; | |
bda4e0fb | 2006 | |
db3cbfff KB |
2007 | memset(&cmd, 0, sizeof(cmd)); |
2008 | cmd.delete_queue.opcode = opcode; | |
2009 | cmd.delete_queue.qid = cpu_to_le16(nvmeq->qid); | |
bda4e0fb | 2010 | |
eb71f435 | 2011 | req = nvme_alloc_request(q, &cmd, BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
db3cbfff KB |
2012 | if (IS_ERR(req)) |
2013 | return PTR_ERR(req); | |
bda4e0fb | 2014 | |
db3cbfff KB |
2015 | req->timeout = ADMIN_TIMEOUT; |
2016 | req->end_io_data = nvmeq; | |
2017 | ||
2018 | blk_execute_rq_nowait(q, NULL, req, false, | |
2019 | opcode == nvme_admin_delete_cq ? | |
2020 | nvme_del_cq_end : nvme_del_queue_end); | |
2021 | return 0; | |
bda4e0fb KB |
2022 | } |
2023 | ||
ee9aebb2 | 2024 | static void nvme_disable_io_queues(struct nvme_dev *dev) |
a5768aa8 | 2025 | { |
ee9aebb2 | 2026 | int pass, queues = dev->online_queues - 1; |
db3cbfff KB |
2027 | unsigned long timeout; |
2028 | u8 opcode = nvme_admin_delete_sq; | |
a5768aa8 | 2029 | |
db3cbfff | 2030 | for (pass = 0; pass < 2; pass++) { |
014a0d60 | 2031 | int sent = 0, i = queues; |
db3cbfff KB |
2032 | |
2033 | reinit_completion(&dev->ioq_wait); | |
2034 | retry: | |
2035 | timeout = ADMIN_TIMEOUT; | |
c21377f8 | 2036 | for (; i > 0; i--, sent++) |
147b27e4 | 2037 | if (nvme_delete_queue(&dev->queues[i], opcode)) |
db3cbfff | 2038 | break; |
c21377f8 | 2039 | |
db3cbfff KB |
2040 | while (sent--) { |
2041 | timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); | |
2042 | if (timeout == 0) | |
2043 | return; | |
2044 | if (i) | |
2045 | goto retry; | |
2046 | } | |
2047 | opcode = nvme_admin_delete_cq; | |
2048 | } | |
a5768aa8 KB |
2049 | } |
2050 | ||
422ef0c7 | 2051 | /* |
2b1b7e78 | 2052 | * return error value only when tagset allocation failed |
422ef0c7 | 2053 | */ |
8d85fce7 | 2054 | static int nvme_dev_add(struct nvme_dev *dev) |
b60503ba | 2055 | { |
2b1b7e78 JW |
2056 | int ret; |
2057 | ||
5bae7f73 | 2058 | if (!dev->ctrl.tagset) { |
ffe7704d KB |
2059 | dev->tagset.ops = &nvme_mq_ops; |
2060 | dev->tagset.nr_hw_queues = dev->online_queues - 1; | |
2061 | dev->tagset.timeout = NVME_IO_TIMEOUT; | |
2062 | dev->tagset.numa_node = dev_to_node(dev->dev); | |
2063 | dev->tagset.queue_depth = | |
a4aea562 | 2064 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; |
a7a7cbe3 CK |
2065 | dev->tagset.cmd_size = nvme_pci_cmd_size(dev, false); |
2066 | if ((dev->ctrl.sgls & ((1 << 0) | (1 << 1))) && sgl_threshold) { | |
2067 | dev->tagset.cmd_size = max(dev->tagset.cmd_size, | |
2068 | nvme_pci_cmd_size(dev, true)); | |
2069 | } | |
ffe7704d KB |
2070 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; |
2071 | dev->tagset.driver_data = dev; | |
b60503ba | 2072 | |
2b1b7e78 JW |
2073 | ret = blk_mq_alloc_tag_set(&dev->tagset); |
2074 | if (ret) { | |
2075 | dev_warn(dev->ctrl.device, | |
2076 | "IO queues tagset allocation failed %d\n", ret); | |
2077 | return ret; | |
2078 | } | |
5bae7f73 | 2079 | dev->ctrl.tagset = &dev->tagset; |
f9f38e33 HK |
2080 | |
2081 | nvme_dbbuf_set(dev); | |
949928c1 KB |
2082 | } else { |
2083 | blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1); | |
2084 | ||
2085 | /* Free previously allocated queues that are no longer usable */ | |
2086 | nvme_free_queues(dev, dev->online_queues); | |
ffe7704d | 2087 | } |
949928c1 | 2088 | |
e1e5e564 | 2089 | return 0; |
b60503ba MW |
2090 | } |
2091 | ||
b00a726a | 2092 | static int nvme_pci_enable(struct nvme_dev *dev) |
0877cb0d | 2093 | { |
b00a726a | 2094 | int result = -ENOMEM; |
e75ec752 | 2095 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
0877cb0d KB |
2096 | |
2097 | if (pci_enable_device_mem(pdev)) | |
2098 | return result; | |
2099 | ||
0877cb0d | 2100 | pci_set_master(pdev); |
0877cb0d | 2101 | |
e75ec752 CH |
2102 | if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && |
2103 | dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) | |
052d0efa | 2104 | goto disable; |
0877cb0d | 2105 | |
7a67cbea | 2106 | if (readl(dev->bar + NVME_REG_CSTS) == -1) { |
0e53d180 | 2107 | result = -ENODEV; |
b00a726a | 2108 | goto disable; |
0e53d180 | 2109 | } |
e32efbfc JA |
2110 | |
2111 | /* | |
a5229050 KB |
2112 | * Some devices and/or platforms don't advertise or work with INTx |
2113 | * interrupts. Pre-enable a single MSIX or MSI vec for setup. We'll | |
2114 | * adjust this later. | |
e32efbfc | 2115 | */ |
dca51e78 CH |
2116 | result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); |
2117 | if (result < 0) | |
2118 | return result; | |
e32efbfc | 2119 | |
20d0dfe6 | 2120 | dev->ctrl.cap = lo_hi_readq(dev->bar + NVME_REG_CAP); |
7a67cbea | 2121 | |
20d0dfe6 | 2122 | dev->q_depth = min_t(int, NVME_CAP_MQES(dev->ctrl.cap) + 1, |
b27c1e68 | 2123 | io_queue_depth); |
20d0dfe6 | 2124 | dev->db_stride = 1 << NVME_CAP_STRIDE(dev->ctrl.cap); |
7a67cbea | 2125 | dev->dbs = dev->bar + 4096; |
1f390c1f SG |
2126 | |
2127 | /* | |
2128 | * Temporary fix for the Apple controller found in the MacBook8,1 and | |
2129 | * some MacBook7,1 to avoid controller resets and data loss. | |
2130 | */ | |
2131 | if (pdev->vendor == PCI_VENDOR_ID_APPLE && pdev->device == 0x2001) { | |
2132 | dev->q_depth = 2; | |
9bdcfb10 CH |
2133 | dev_warn(dev->ctrl.device, "detected Apple NVMe controller, " |
2134 | "set queue depth=%u to work around controller resets\n", | |
1f390c1f | 2135 | dev->q_depth); |
d554b5e1 MP |
2136 | } else if (pdev->vendor == PCI_VENDOR_ID_SAMSUNG && |
2137 | (pdev->device == 0xa821 || pdev->device == 0xa822) && | |
20d0dfe6 | 2138 | NVME_CAP_MQES(dev->ctrl.cap) == 0) { |
d554b5e1 MP |
2139 | dev->q_depth = 64; |
2140 | dev_err(dev->ctrl.device, "detected PM1725 NVMe controller, " | |
2141 | "set queue depth=%u\n", dev->q_depth); | |
1f390c1f SG |
2142 | } |
2143 | ||
f65efd6d | 2144 | nvme_map_cmb(dev); |
202021c1 | 2145 | |
a0a3408e KB |
2146 | pci_enable_pcie_error_reporting(pdev); |
2147 | pci_save_state(pdev); | |
0877cb0d KB |
2148 | return 0; |
2149 | ||
2150 | disable: | |
0877cb0d KB |
2151 | pci_disable_device(pdev); |
2152 | return result; | |
2153 | } | |
2154 | ||
2155 | static void nvme_dev_unmap(struct nvme_dev *dev) | |
b00a726a KB |
2156 | { |
2157 | if (dev->bar) | |
2158 | iounmap(dev->bar); | |
a1f447b3 | 2159 | pci_release_mem_regions(to_pci_dev(dev->dev)); |
b00a726a KB |
2160 | } |
2161 | ||
2162 | static void nvme_pci_disable(struct nvme_dev *dev) | |
0877cb0d | 2163 | { |
e75ec752 CH |
2164 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
2165 | ||
f63572df | 2166 | nvme_release_cmb(dev); |
dca51e78 | 2167 | pci_free_irq_vectors(pdev); |
0877cb0d | 2168 | |
a0a3408e KB |
2169 | if (pci_is_enabled(pdev)) { |
2170 | pci_disable_pcie_error_reporting(pdev); | |
e75ec752 | 2171 | pci_disable_device(pdev); |
4d115420 | 2172 | } |
4d115420 KB |
2173 | } |
2174 | ||
a5cdb68c | 2175 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) |
b60503ba | 2176 | { |
ee9aebb2 | 2177 | int i; |
302ad8cc KB |
2178 | bool dead = true; |
2179 | struct pci_dev *pdev = to_pci_dev(dev->dev); | |
22404274 | 2180 | |
77bf25ea | 2181 | mutex_lock(&dev->shutdown_lock); |
302ad8cc KB |
2182 | if (pci_is_enabled(pdev)) { |
2183 | u32 csts = readl(dev->bar + NVME_REG_CSTS); | |
2184 | ||
ebef7368 KB |
2185 | if (dev->ctrl.state == NVME_CTRL_LIVE || |
2186 | dev->ctrl.state == NVME_CTRL_RESETTING) | |
302ad8cc KB |
2187 | nvme_start_freeze(&dev->ctrl); |
2188 | dead = !!((csts & NVME_CSTS_CFS) || !(csts & NVME_CSTS_RDY) || | |
2189 | pdev->error_state != pci_channel_io_normal); | |
c9d3bf88 | 2190 | } |
c21377f8 | 2191 | |
302ad8cc KB |
2192 | /* |
2193 | * Give the controller a chance to complete all entered requests if | |
2194 | * doing a safe shutdown. | |
2195 | */ | |
87ad72a5 CH |
2196 | if (!dead) { |
2197 | if (shutdown) | |
2198 | nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT); | |
2199 | ||
2200 | /* | |
2201 | * If the controller is still alive tell it to stop using the | |
2202 | * host memory buffer. In theory the shutdown / reset should | |
2203 | * make sure that it doesn't access the host memoery anymore, | |
2204 | * but I'd rather be safe than sorry.. | |
2205 | */ | |
2206 | if (dev->host_mem_descs) | |
2207 | nvme_set_host_mem(dev, 0); | |
2208 | ||
2209 | } | |
302ad8cc KB |
2210 | nvme_stop_queues(&dev->ctrl); |
2211 | ||
ee9aebb2 KB |
2212 | if (!dead) { |
2213 | nvme_disable_io_queues(dev); | |
a5cdb68c | 2214 | nvme_disable_admin_queue(dev, shutdown); |
4d115420 | 2215 | } |
ee9aebb2 KB |
2216 | for (i = dev->ctrl.queue_count - 1; i >= 0; i--) |
2217 | nvme_suspend_queue(&dev->queues[i]); | |
2218 | ||
b00a726a | 2219 | nvme_pci_disable(dev); |
07836e65 | 2220 | |
e1958e65 ML |
2221 | blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); |
2222 | blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); | |
302ad8cc KB |
2223 | |
2224 | /* | |
2225 | * The driver will not be starting up queues again if shutting down so | |
2226 | * must flush all entered requests to their failed completion to avoid | |
2227 | * deadlocking blk-mq hot-cpu notifier. | |
2228 | */ | |
2229 | if (shutdown) | |
2230 | nvme_start_queues(&dev->ctrl); | |
77bf25ea | 2231 | mutex_unlock(&dev->shutdown_lock); |
b60503ba MW |
2232 | } |
2233 | ||
091b6092 MW |
2234 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
2235 | { | |
e75ec752 | 2236 | dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, |
091b6092 MW |
2237 | PAGE_SIZE, PAGE_SIZE, 0); |
2238 | if (!dev->prp_page_pool) | |
2239 | return -ENOMEM; | |
2240 | ||
99802a7a | 2241 | /* Optimisation for I/Os between 4k and 128k */ |
e75ec752 | 2242 | dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, |
99802a7a MW |
2243 | 256, 256, 0); |
2244 | if (!dev->prp_small_pool) { | |
2245 | dma_pool_destroy(dev->prp_page_pool); | |
2246 | return -ENOMEM; | |
2247 | } | |
091b6092 MW |
2248 | return 0; |
2249 | } | |
2250 | ||
2251 | static void nvme_release_prp_pools(struct nvme_dev *dev) | |
2252 | { | |
2253 | dma_pool_destroy(dev->prp_page_pool); | |
99802a7a | 2254 | dma_pool_destroy(dev->prp_small_pool); |
091b6092 MW |
2255 | } |
2256 | ||
1673f1f0 | 2257 | static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) |
5e82e952 | 2258 | { |
1673f1f0 | 2259 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
9ac27090 | 2260 | |
f9f38e33 | 2261 | nvme_dbbuf_dma_free(dev); |
e75ec752 | 2262 | put_device(dev->dev); |
4af0e21c KB |
2263 | if (dev->tagset.tags) |
2264 | blk_mq_free_tag_set(&dev->tagset); | |
1c63dc66 CH |
2265 | if (dev->ctrl.admin_q) |
2266 | blk_put_queue(dev->ctrl.admin_q); | |
5e82e952 | 2267 | kfree(dev->queues); |
e286bcfc | 2268 | free_opal_dev(dev->ctrl.opal_dev); |
5e82e952 KB |
2269 | kfree(dev); |
2270 | } | |
2271 | ||
f58944e2 KB |
2272 | static void nvme_remove_dead_ctrl(struct nvme_dev *dev, int status) |
2273 | { | |
237045fc | 2274 | dev_warn(dev->ctrl.device, "Removing after probe failure status: %d\n", status); |
f58944e2 | 2275 | |
d22524a4 | 2276 | nvme_get_ctrl(&dev->ctrl); |
69d9a99c | 2277 | nvme_dev_disable(dev, false); |
03e0f3a6 | 2278 | if (!queue_work(nvme_wq, &dev->remove_work)) |
f58944e2 KB |
2279 | nvme_put_ctrl(&dev->ctrl); |
2280 | } | |
2281 | ||
fd634f41 | 2282 | static void nvme_reset_work(struct work_struct *work) |
5e82e952 | 2283 | { |
d86c4d8e CH |
2284 | struct nvme_dev *dev = |
2285 | container_of(work, struct nvme_dev, ctrl.reset_work); | |
a98e58e5 | 2286 | bool was_suspend = !!(dev->ctrl.ctrl_config & NVME_CC_SHN_NORMAL); |
f58944e2 | 2287 | int result = -ENODEV; |
2b1b7e78 | 2288 | enum nvme_ctrl_state new_state = NVME_CTRL_LIVE; |
5e82e952 | 2289 | |
82b057ca | 2290 | if (WARN_ON(dev->ctrl.state != NVME_CTRL_RESETTING)) |
fd634f41 | 2291 | goto out; |
5e82e952 | 2292 | |
fd634f41 CH |
2293 | /* |
2294 | * If we're called to reset a live controller first shut it down before | |
2295 | * moving on. | |
2296 | */ | |
b00a726a | 2297 | if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) |
a5cdb68c | 2298 | nvme_dev_disable(dev, false); |
5e82e952 | 2299 | |
ad70062c | 2300 | /* |
ad6a0a52 | 2301 | * Introduce CONNECTING state from nvme-fc/rdma transports to mark the |
ad70062c JW |
2302 | * initializing procedure here. |
2303 | */ | |
ad6a0a52 | 2304 | if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_CONNECTING)) { |
ad70062c | 2305 | dev_warn(dev->ctrl.device, |
ad6a0a52 | 2306 | "failed to mark controller CONNECTING\n"); |
ad70062c JW |
2307 | goto out; |
2308 | } | |
2309 | ||
b00a726a | 2310 | result = nvme_pci_enable(dev); |
f0b50732 | 2311 | if (result) |
3cf519b5 | 2312 | goto out; |
f0b50732 | 2313 | |
01ad0990 | 2314 | result = nvme_pci_configure_admin_queue(dev); |
f0b50732 | 2315 | if (result) |
f58944e2 | 2316 | goto out; |
f0b50732 | 2317 | |
0fb59cbc KB |
2318 | result = nvme_alloc_admin_tags(dev); |
2319 | if (result) | |
f58944e2 | 2320 | goto out; |
b9afca3e | 2321 | |
ce4541f4 CH |
2322 | result = nvme_init_identify(&dev->ctrl); |
2323 | if (result) | |
f58944e2 | 2324 | goto out; |
ce4541f4 | 2325 | |
e286bcfc SB |
2326 | if (dev->ctrl.oacs & NVME_CTRL_OACS_SEC_SUPP) { |
2327 | if (!dev->ctrl.opal_dev) | |
2328 | dev->ctrl.opal_dev = | |
2329 | init_opal_dev(&dev->ctrl, &nvme_sec_submit); | |
2330 | else if (was_suspend) | |
2331 | opal_unlock_from_suspend(dev->ctrl.opal_dev); | |
2332 | } else { | |
2333 | free_opal_dev(dev->ctrl.opal_dev); | |
2334 | dev->ctrl.opal_dev = NULL; | |
4f1244c8 | 2335 | } |
a98e58e5 | 2336 | |
f9f38e33 HK |
2337 | if (dev->ctrl.oacs & NVME_CTRL_OACS_DBBUF_SUPP) { |
2338 | result = nvme_dbbuf_dma_alloc(dev); | |
2339 | if (result) | |
2340 | dev_warn(dev->dev, | |
2341 | "unable to allocate dma for dbbuf\n"); | |
2342 | } | |
2343 | ||
9620cfba CH |
2344 | if (dev->ctrl.hmpre) { |
2345 | result = nvme_setup_host_mem(dev); | |
2346 | if (result < 0) | |
2347 | goto out; | |
2348 | } | |
87ad72a5 | 2349 | |
f0b50732 | 2350 | result = nvme_setup_io_queues(dev); |
badc34d4 | 2351 | if (result) |
f58944e2 | 2352 | goto out; |
f0b50732 | 2353 | |
2659e57b CH |
2354 | /* |
2355 | * Keep the controller around but remove all namespaces if we don't have | |
2356 | * any working I/O queue. | |
2357 | */ | |
3cf519b5 | 2358 | if (dev->online_queues < 2) { |
1b3c47c1 | 2359 | dev_warn(dev->ctrl.device, "IO queues not created\n"); |
3b24774e | 2360 | nvme_kill_queues(&dev->ctrl); |
5bae7f73 | 2361 | nvme_remove_namespaces(&dev->ctrl); |
2b1b7e78 | 2362 | new_state = NVME_CTRL_ADMIN_ONLY; |
3cf519b5 | 2363 | } else { |
25646264 | 2364 | nvme_start_queues(&dev->ctrl); |
302ad8cc | 2365 | nvme_wait_freeze(&dev->ctrl); |
2b1b7e78 JW |
2366 | /* hit this only when allocate tagset fails */ |
2367 | if (nvme_dev_add(dev)) | |
2368 | new_state = NVME_CTRL_ADMIN_ONLY; | |
302ad8cc | 2369 | nvme_unfreeze(&dev->ctrl); |
3cf519b5 CH |
2370 | } |
2371 | ||
2b1b7e78 JW |
2372 | /* |
2373 | * If only admin queue live, keep it to do further investigation or | |
2374 | * recovery. | |
2375 | */ | |
2376 | if (!nvme_change_ctrl_state(&dev->ctrl, new_state)) { | |
2377 | dev_warn(dev->ctrl.device, | |
2378 | "failed to mark controller state %d\n", new_state); | |
bb8d261e CH |
2379 | goto out; |
2380 | } | |
92911a55 | 2381 | |
d09f2b45 | 2382 | nvme_start_ctrl(&dev->ctrl); |
3cf519b5 | 2383 | return; |
f0b50732 | 2384 | |
3cf519b5 | 2385 | out: |
f58944e2 | 2386 | nvme_remove_dead_ctrl(dev, result); |
f0b50732 KB |
2387 | } |
2388 | ||
5c8809e6 | 2389 | static void nvme_remove_dead_ctrl_work(struct work_struct *work) |
9a6b9458 | 2390 | { |
5c8809e6 | 2391 | struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); |
e75ec752 | 2392 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
9a6b9458 | 2393 | |
69d9a99c | 2394 | nvme_kill_queues(&dev->ctrl); |
9a6b9458 | 2395 | if (pci_get_drvdata(pdev)) |
921920ab | 2396 | device_release_driver(&pdev->dev); |
1673f1f0 | 2397 | nvme_put_ctrl(&dev->ctrl); |
9a6b9458 KB |
2398 | } |
2399 | ||
1c63dc66 | 2400 | static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) |
9ca97374 | 2401 | { |
1c63dc66 | 2402 | *val = readl(to_nvme_dev(ctrl)->bar + off); |
90667892 | 2403 | return 0; |
9ca97374 TH |
2404 | } |
2405 | ||
5fd4ce1b | 2406 | static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) |
4cc06521 | 2407 | { |
5fd4ce1b CH |
2408 | writel(val, to_nvme_dev(ctrl)->bar + off); |
2409 | return 0; | |
2410 | } | |
4cc06521 | 2411 | |
7fd8930f CH |
2412 | static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) |
2413 | { | |
2414 | *val = readq(to_nvme_dev(ctrl)->bar + off); | |
2415 | return 0; | |
4cc06521 KB |
2416 | } |
2417 | ||
1c63dc66 | 2418 | static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { |
1a353d85 | 2419 | .name = "pcie", |
e439bb12 | 2420 | .module = THIS_MODULE, |
c81bfba9 | 2421 | .flags = NVME_F_METADATA_SUPPORTED, |
1c63dc66 | 2422 | .reg_read32 = nvme_pci_reg_read32, |
5fd4ce1b | 2423 | .reg_write32 = nvme_pci_reg_write32, |
7fd8930f | 2424 | .reg_read64 = nvme_pci_reg_read64, |
1673f1f0 | 2425 | .free_ctrl = nvme_pci_free_ctrl, |
f866fc42 | 2426 | .submit_async_event = nvme_pci_submit_async_event, |
1c63dc66 | 2427 | }; |
4cc06521 | 2428 | |
b00a726a KB |
2429 | static int nvme_dev_map(struct nvme_dev *dev) |
2430 | { | |
b00a726a KB |
2431 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
2432 | ||
a1f447b3 | 2433 | if (pci_request_mem_regions(pdev, "nvme")) |
b00a726a KB |
2434 | return -ENODEV; |
2435 | ||
97f6ef64 | 2436 | if (nvme_remap_bar(dev, NVME_REG_DBS + 4096)) |
b00a726a KB |
2437 | goto release; |
2438 | ||
9fa196e7 | 2439 | return 0; |
b00a726a | 2440 | release: |
9fa196e7 MG |
2441 | pci_release_mem_regions(pdev); |
2442 | return -ENODEV; | |
b00a726a KB |
2443 | } |
2444 | ||
8427bbc2 | 2445 | static unsigned long check_vendor_combination_bug(struct pci_dev *pdev) |
ff5350a8 AL |
2446 | { |
2447 | if (pdev->vendor == 0x144d && pdev->device == 0xa802) { | |
2448 | /* | |
2449 | * Several Samsung devices seem to drop off the PCIe bus | |
2450 | * randomly when APST is on and uses the deepest sleep state. | |
2451 | * This has been observed on a Samsung "SM951 NVMe SAMSUNG | |
2452 | * 256GB", a "PM951 NVMe SAMSUNG 512GB", and a "Samsung SSD | |
2453 | * 950 PRO 256GB", but it seems to be restricted to two Dell | |
2454 | * laptops. | |
2455 | */ | |
2456 | if (dmi_match(DMI_SYS_VENDOR, "Dell Inc.") && | |
2457 | (dmi_match(DMI_PRODUCT_NAME, "XPS 15 9550") || | |
2458 | dmi_match(DMI_PRODUCT_NAME, "Precision 5510"))) | |
2459 | return NVME_QUIRK_NO_DEEPEST_PS; | |
8427bbc2 KHF |
2460 | } else if (pdev->vendor == 0x144d && pdev->device == 0xa804) { |
2461 | /* | |
2462 | * Samsung SSD 960 EVO drops off the PCIe bus after system | |
2463 | * suspend on a Ryzen board, ASUS PRIME B350M-A. | |
2464 | */ | |
2465 | if (dmi_match(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC.") && | |
2466 | dmi_match(DMI_BOARD_NAME, "PRIME B350M-A")) | |
2467 | return NVME_QUIRK_NO_APST; | |
ff5350a8 AL |
2468 | } |
2469 | ||
2470 | return 0; | |
2471 | } | |
2472 | ||
8d85fce7 | 2473 | static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
b60503ba | 2474 | { |
a4aea562 | 2475 | int node, result = -ENOMEM; |
b60503ba | 2476 | struct nvme_dev *dev; |
ff5350a8 | 2477 | unsigned long quirks = id->driver_data; |
b60503ba | 2478 | |
a4aea562 MB |
2479 | node = dev_to_node(&pdev->dev); |
2480 | if (node == NUMA_NO_NODE) | |
2fa84351 | 2481 | set_dev_node(&pdev->dev, first_memory_node); |
a4aea562 MB |
2482 | |
2483 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); | |
b60503ba MW |
2484 | if (!dev) |
2485 | return -ENOMEM; | |
147b27e4 SG |
2486 | |
2487 | dev->queues = kcalloc_node(num_possible_cpus() + 1, | |
2488 | sizeof(struct nvme_queue), GFP_KERNEL, node); | |
b60503ba MW |
2489 | if (!dev->queues) |
2490 | goto free; | |
2491 | ||
e75ec752 | 2492 | dev->dev = get_device(&pdev->dev); |
9a6b9458 | 2493 | pci_set_drvdata(pdev, dev); |
1c63dc66 | 2494 | |
b00a726a KB |
2495 | result = nvme_dev_map(dev); |
2496 | if (result) | |
b00c9b7a | 2497 | goto put_pci; |
b00a726a | 2498 | |
d86c4d8e | 2499 | INIT_WORK(&dev->ctrl.reset_work, nvme_reset_work); |
5c8809e6 | 2500 | INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); |
77bf25ea | 2501 | mutex_init(&dev->shutdown_lock); |
db3cbfff | 2502 | init_completion(&dev->ioq_wait); |
b60503ba | 2503 | |
091b6092 MW |
2504 | result = nvme_setup_prp_pools(dev); |
2505 | if (result) | |
b00c9b7a | 2506 | goto unmap; |
4cc06521 | 2507 | |
8427bbc2 | 2508 | quirks |= check_vendor_combination_bug(pdev); |
ff5350a8 | 2509 | |
f3ca80fc | 2510 | result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, |
ff5350a8 | 2511 | quirks); |
4cc06521 | 2512 | if (result) |
2e1d8448 | 2513 | goto release_pools; |
740216fc | 2514 | |
1b3c47c1 SG |
2515 | dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev)); |
2516 | ||
4caff8fc SG |
2517 | nvme_reset_ctrl(&dev->ctrl); |
2518 | ||
b60503ba MW |
2519 | return 0; |
2520 | ||
0877cb0d | 2521 | release_pools: |
091b6092 | 2522 | nvme_release_prp_pools(dev); |
b00c9b7a CJ |
2523 | unmap: |
2524 | nvme_dev_unmap(dev); | |
a96d4f5c | 2525 | put_pci: |
e75ec752 | 2526 | put_device(dev->dev); |
b60503ba MW |
2527 | free: |
2528 | kfree(dev->queues); | |
b60503ba MW |
2529 | kfree(dev); |
2530 | return result; | |
2531 | } | |
2532 | ||
775755ed | 2533 | static void nvme_reset_prepare(struct pci_dev *pdev) |
f0d54a54 | 2534 | { |
a6739479 | 2535 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
f263fbb8 | 2536 | nvme_dev_disable(dev, false); |
775755ed | 2537 | } |
f0d54a54 | 2538 | |
775755ed CH |
2539 | static void nvme_reset_done(struct pci_dev *pdev) |
2540 | { | |
f263fbb8 | 2541 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
79c48ccf | 2542 | nvme_reset_ctrl_sync(&dev->ctrl); |
f0d54a54 KB |
2543 | } |
2544 | ||
09ece142 KB |
2545 | static void nvme_shutdown(struct pci_dev *pdev) |
2546 | { | |
2547 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
a5cdb68c | 2548 | nvme_dev_disable(dev, true); |
09ece142 KB |
2549 | } |
2550 | ||
f58944e2 KB |
2551 | /* |
2552 | * The driver's remove may be called on a device in a partially initialized | |
2553 | * state. This function must not have any dependencies on the device state in | |
2554 | * order to proceed. | |
2555 | */ | |
8d85fce7 | 2556 | static void nvme_remove(struct pci_dev *pdev) |
b60503ba MW |
2557 | { |
2558 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
9a6b9458 | 2559 | |
bb8d261e CH |
2560 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); |
2561 | ||
d86c4d8e | 2562 | cancel_work_sync(&dev->ctrl.reset_work); |
9a6b9458 | 2563 | pci_set_drvdata(pdev, NULL); |
0ff9d4e1 | 2564 | |
6db28eda | 2565 | if (!pci_device_is_present(pdev)) { |
0ff9d4e1 | 2566 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DEAD); |
6db28eda KB |
2567 | nvme_dev_disable(dev, false); |
2568 | } | |
0ff9d4e1 | 2569 | |
d86c4d8e | 2570 | flush_work(&dev->ctrl.reset_work); |
d09f2b45 SG |
2571 | nvme_stop_ctrl(&dev->ctrl); |
2572 | nvme_remove_namespaces(&dev->ctrl); | |
a5cdb68c | 2573 | nvme_dev_disable(dev, true); |
87ad72a5 | 2574 | nvme_free_host_mem(dev); |
a4aea562 | 2575 | nvme_dev_remove_admin(dev); |
a1a5ef99 | 2576 | nvme_free_queues(dev, 0); |
d09f2b45 | 2577 | nvme_uninit_ctrl(&dev->ctrl); |
9a6b9458 | 2578 | nvme_release_prp_pools(dev); |
b00a726a | 2579 | nvme_dev_unmap(dev); |
1673f1f0 | 2580 | nvme_put_ctrl(&dev->ctrl); |
b60503ba MW |
2581 | } |
2582 | ||
13880f5b KB |
2583 | static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs) |
2584 | { | |
2585 | int ret = 0; | |
2586 | ||
2587 | if (numvfs == 0) { | |
2588 | if (pci_vfs_assigned(pdev)) { | |
2589 | dev_warn(&pdev->dev, | |
2590 | "Cannot disable SR-IOV VFs while assigned\n"); | |
2591 | return -EPERM; | |
2592 | } | |
2593 | pci_disable_sriov(pdev); | |
2594 | return 0; | |
2595 | } | |
2596 | ||
2597 | ret = pci_enable_sriov(pdev, numvfs); | |
2598 | return ret ? ret : numvfs; | |
2599 | } | |
2600 | ||
671a6018 | 2601 | #ifdef CONFIG_PM_SLEEP |
cd638946 KB |
2602 | static int nvme_suspend(struct device *dev) |
2603 | { | |
2604 | struct pci_dev *pdev = to_pci_dev(dev); | |
2605 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
2606 | ||
a5cdb68c | 2607 | nvme_dev_disable(ndev, true); |
cd638946 KB |
2608 | return 0; |
2609 | } | |
2610 | ||
2611 | static int nvme_resume(struct device *dev) | |
2612 | { | |
2613 | struct pci_dev *pdev = to_pci_dev(dev); | |
2614 | struct nvme_dev *ndev = pci_get_drvdata(pdev); | |
cd638946 | 2615 | |
d86c4d8e | 2616 | nvme_reset_ctrl(&ndev->ctrl); |
9a6b9458 | 2617 | return 0; |
cd638946 | 2618 | } |
671a6018 | 2619 | #endif |
cd638946 KB |
2620 | |
2621 | static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); | |
b60503ba | 2622 | |
a0a3408e KB |
2623 | static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev, |
2624 | pci_channel_state_t state) | |
2625 | { | |
2626 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
2627 | ||
2628 | /* | |
2629 | * A frozen channel requires a reset. When detected, this method will | |
2630 | * shutdown the controller to quiesce. The controller will be restarted | |
2631 | * after the slot reset through driver's slot_reset callback. | |
2632 | */ | |
a0a3408e KB |
2633 | switch (state) { |
2634 | case pci_channel_io_normal: | |
2635 | return PCI_ERS_RESULT_CAN_RECOVER; | |
2636 | case pci_channel_io_frozen: | |
d011fb31 KB |
2637 | dev_warn(dev->ctrl.device, |
2638 | "frozen state error detected, reset controller\n"); | |
a5cdb68c | 2639 | nvme_dev_disable(dev, false); |
a0a3408e KB |
2640 | return PCI_ERS_RESULT_NEED_RESET; |
2641 | case pci_channel_io_perm_failure: | |
d011fb31 KB |
2642 | dev_warn(dev->ctrl.device, |
2643 | "failure state error detected, request disconnect\n"); | |
a0a3408e KB |
2644 | return PCI_ERS_RESULT_DISCONNECT; |
2645 | } | |
2646 | return PCI_ERS_RESULT_NEED_RESET; | |
2647 | } | |
2648 | ||
2649 | static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) | |
2650 | { | |
2651 | struct nvme_dev *dev = pci_get_drvdata(pdev); | |
2652 | ||
1b3c47c1 | 2653 | dev_info(dev->ctrl.device, "restart after slot reset\n"); |
a0a3408e | 2654 | pci_restore_state(pdev); |
d86c4d8e | 2655 | nvme_reset_ctrl(&dev->ctrl); |
a0a3408e KB |
2656 | return PCI_ERS_RESULT_RECOVERED; |
2657 | } | |
2658 | ||
2659 | static void nvme_error_resume(struct pci_dev *pdev) | |
2660 | { | |
2661 | pci_cleanup_aer_uncorrect_error_status(pdev); | |
2662 | } | |
2663 | ||
1d352035 | 2664 | static const struct pci_error_handlers nvme_err_handler = { |
b60503ba | 2665 | .error_detected = nvme_error_detected, |
b60503ba MW |
2666 | .slot_reset = nvme_slot_reset, |
2667 | .resume = nvme_error_resume, | |
775755ed CH |
2668 | .reset_prepare = nvme_reset_prepare, |
2669 | .reset_done = nvme_reset_done, | |
b60503ba MW |
2670 | }; |
2671 | ||
6eb0d698 | 2672 | static const struct pci_device_id nvme_id_table[] = { |
106198ed | 2673 | { PCI_VDEVICE(INTEL, 0x0953), |
08095e70 | 2674 | .driver_data = NVME_QUIRK_STRIPE_SIZE | |
e850fd16 | 2675 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
99466e70 KB |
2676 | { PCI_VDEVICE(INTEL, 0x0a53), |
2677 | .driver_data = NVME_QUIRK_STRIPE_SIZE | | |
e850fd16 | 2678 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
99466e70 KB |
2679 | { PCI_VDEVICE(INTEL, 0x0a54), |
2680 | .driver_data = NVME_QUIRK_STRIPE_SIZE | | |
e850fd16 | 2681 | NVME_QUIRK_DEALLOCATE_ZEROES, }, |
f99cb7af DWF |
2682 | { PCI_VDEVICE(INTEL, 0x0a55), |
2683 | .driver_data = NVME_QUIRK_STRIPE_SIZE | | |
2684 | NVME_QUIRK_DEALLOCATE_ZEROES, }, | |
50af47d0 AL |
2685 | { PCI_VDEVICE(INTEL, 0xf1a5), /* Intel 600P/P3100 */ |
2686 | .driver_data = NVME_QUIRK_NO_DEEPEST_PS }, | |
540c801c KB |
2687 | { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ |
2688 | .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, | |
54adc010 GP |
2689 | { PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */ |
2690 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
8c97eecc JL |
2691 | { PCI_DEVICE(0x1c58, 0x0023), /* WDC SN200 adapter */ |
2692 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
015282c9 WW |
2693 | { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ |
2694 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
d554b5e1 MP |
2695 | { PCI_DEVICE(0x144d, 0xa821), /* Samsung PM1725 */ |
2696 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
2697 | { PCI_DEVICE(0x144d, 0xa822), /* Samsung PM1725a */ | |
2698 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, | |
608cc4b1 CH |
2699 | { PCI_DEVICE(0x1d1d, 0x1f1f), /* LighNVM qemu device */ |
2700 | .driver_data = NVME_QUIRK_LIGHTNVM, }, | |
2701 | { PCI_DEVICE(0x1d1d, 0x2807), /* CNEX WL */ | |
2702 | .driver_data = NVME_QUIRK_LIGHTNVM, }, | |
b60503ba | 2703 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
c74dc780 | 2704 | { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, |
124298bd | 2705 | { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) }, |
b60503ba MW |
2706 | { 0, } |
2707 | }; | |
2708 | MODULE_DEVICE_TABLE(pci, nvme_id_table); | |
2709 | ||
2710 | static struct pci_driver nvme_driver = { | |
2711 | .name = "nvme", | |
2712 | .id_table = nvme_id_table, | |
2713 | .probe = nvme_probe, | |
8d85fce7 | 2714 | .remove = nvme_remove, |
09ece142 | 2715 | .shutdown = nvme_shutdown, |
cd638946 KB |
2716 | .driver = { |
2717 | .pm = &nvme_dev_pm_ops, | |
2718 | }, | |
13880f5b | 2719 | .sriov_configure = nvme_pci_sriov_configure, |
b60503ba MW |
2720 | .err_handler = &nvme_err_handler, |
2721 | }; | |
2722 | ||
2723 | static int __init nvme_init(void) | |
2724 | { | |
9a6327d2 | 2725 | return pci_register_driver(&nvme_driver); |
b60503ba MW |
2726 | } |
2727 | ||
2728 | static void __exit nvme_exit(void) | |
2729 | { | |
2730 | pci_unregister_driver(&nvme_driver); | |
03e0f3a6 | 2731 | flush_workqueue(nvme_wq); |
21bd78bc | 2732 | _nvme_check_size(); |
b60503ba MW |
2733 | } |
2734 | ||
2735 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); | |
2736 | MODULE_LICENSE("GPL"); | |
c78b4713 | 2737 | MODULE_VERSION("1.0"); |
b60503ba MW |
2738 | module_init(nvme_init); |
2739 | module_exit(nvme_exit); |