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ca064085 MB |
1 | /* |
2 | * nvme-lightnvm.c - LightNVM NVMe device | |
3 | * | |
4 | * Copyright (C) 2014-2015 IT University of Copenhagen | |
5 | * Initial release: Matias Bjorling <mb@lightnvm.io> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License version | |
9 | * 2 as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; see the file COPYING. If not, write to | |
18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
19 | * USA. | |
20 | * | |
21 | */ | |
22 | ||
23 | #include "nvme.h" | |
24 | ||
ca064085 MB |
25 | #include <linux/nvme.h> |
26 | #include <linux/bitops.h> | |
27 | #include <linux/lightnvm.h> | |
28 | #include <linux/vmalloc.h> | |
29 | ||
30 | enum nvme_nvm_admin_opcode { | |
31 | nvme_nvm_admin_identity = 0xe2, | |
32 | nvme_nvm_admin_get_l2p_tbl = 0xea, | |
33 | nvme_nvm_admin_get_bb_tbl = 0xf2, | |
34 | nvme_nvm_admin_set_bb_tbl = 0xf1, | |
35 | }; | |
36 | ||
37 | struct nvme_nvm_hb_rw { | |
38 | __u8 opcode; | |
39 | __u8 flags; | |
40 | __u16 command_id; | |
41 | __le32 nsid; | |
42 | __u64 rsvd2; | |
43 | __le64 metadata; | |
44 | __le64 prp1; | |
45 | __le64 prp2; | |
46 | __le64 spba; | |
47 | __le16 length; | |
48 | __le16 control; | |
49 | __le32 dsmgmt; | |
50 | __le64 slba; | |
51 | }; | |
52 | ||
53 | struct nvme_nvm_ph_rw { | |
54 | __u8 opcode; | |
55 | __u8 flags; | |
56 | __u16 command_id; | |
57 | __le32 nsid; | |
58 | __u64 rsvd2; | |
59 | __le64 metadata; | |
60 | __le64 prp1; | |
61 | __le64 prp2; | |
62 | __le64 spba; | |
63 | __le16 length; | |
64 | __le16 control; | |
65 | __le32 dsmgmt; | |
66 | __le64 resv; | |
67 | }; | |
68 | ||
69 | struct nvme_nvm_identity { | |
70 | __u8 opcode; | |
71 | __u8 flags; | |
72 | __u16 command_id; | |
73 | __le32 nsid; | |
74 | __u64 rsvd[2]; | |
75 | __le64 prp1; | |
76 | __le64 prp2; | |
77 | __le32 chnl_off; | |
78 | __u32 rsvd11[5]; | |
79 | }; | |
80 | ||
81 | struct nvme_nvm_l2ptbl { | |
82 | __u8 opcode; | |
83 | __u8 flags; | |
84 | __u16 command_id; | |
85 | __le32 nsid; | |
86 | __le32 cdw2[4]; | |
87 | __le64 prp1; | |
88 | __le64 prp2; | |
89 | __le64 slba; | |
90 | __le32 nlb; | |
91 | __le16 cdw14[6]; | |
92 | }; | |
93 | ||
11450469 | 94 | struct nvme_nvm_getbbtbl { |
ca064085 MB |
95 | __u8 opcode; |
96 | __u8 flags; | |
97 | __u16 command_id; | |
98 | __le32 nsid; | |
99 | __u64 rsvd[2]; | |
100 | __le64 prp1; | |
101 | __le64 prp2; | |
11450469 MB |
102 | __le64 spba; |
103 | __u32 rsvd4[4]; | |
104 | }; | |
105 | ||
106 | struct nvme_nvm_setbbtbl { | |
107 | __u8 opcode; | |
108 | __u8 flags; | |
109 | __u16 command_id; | |
110 | __le32 nsid; | |
111 | __le64 rsvd[2]; | |
112 | __le64 prp1; | |
113 | __le64 prp2; | |
114 | __le64 spba; | |
115 | __le16 nlb; | |
116 | __u8 value; | |
117 | __u8 rsvd3; | |
118 | __u32 rsvd4[3]; | |
ca064085 MB |
119 | }; |
120 | ||
121 | struct nvme_nvm_erase_blk { | |
122 | __u8 opcode; | |
123 | __u8 flags; | |
124 | __u16 command_id; | |
125 | __le32 nsid; | |
126 | __u64 rsvd[2]; | |
127 | __le64 prp1; | |
128 | __le64 prp2; | |
129 | __le64 spba; | |
130 | __le16 length; | |
131 | __le16 control; | |
132 | __le32 dsmgmt; | |
133 | __le64 resv; | |
134 | }; | |
135 | ||
136 | struct nvme_nvm_command { | |
137 | union { | |
138 | struct nvme_common_command common; | |
139 | struct nvme_nvm_identity identity; | |
140 | struct nvme_nvm_hb_rw hb_rw; | |
141 | struct nvme_nvm_ph_rw ph_rw; | |
142 | struct nvme_nvm_l2ptbl l2p; | |
11450469 MB |
143 | struct nvme_nvm_getbbtbl get_bb; |
144 | struct nvme_nvm_setbbtbl set_bb; | |
ca064085 MB |
145 | struct nvme_nvm_erase_blk erase; |
146 | }; | |
147 | }; | |
148 | ||
9f867268 MB |
149 | struct nvme_nvm_completion { |
150 | __le64 result; /* Used by LightNVM to return ppa completions */ | |
151 | __le16 sq_head; /* how much of this queue may be reclaimed */ | |
152 | __le16 sq_id; /* submission queue that generated this entry */ | |
153 | __u16 command_id; /* of the command which completed */ | |
154 | __le16 status; /* did the command fail, and if so, why? */ | |
155 | }; | |
156 | ||
6dde1d6c | 157 | #define NVME_NVM_LP_MLC_PAIRS 886 |
ca5927e7 | 158 | struct nvme_nvm_lp_mlc { |
6f929702 | 159 | __le16 num_pairs; |
6dde1d6c | 160 | __u8 pairs[NVME_NVM_LP_MLC_PAIRS]; |
ca5927e7 MB |
161 | }; |
162 | ||
163 | struct nvme_nvm_lp_tbl { | |
164 | __u8 id[8]; | |
165 | struct nvme_nvm_lp_mlc mlc; | |
166 | }; | |
167 | ||
ca064085 MB |
168 | struct nvme_nvm_id_group { |
169 | __u8 mtype; | |
170 | __u8 fmtype; | |
171 | __le16 res16; | |
172 | __u8 num_ch; | |
173 | __u8 num_lun; | |
174 | __u8 num_pln; | |
36d5dbc6 | 175 | __u8 rsvd1; |
ca064085 MB |
176 | __le16 num_blk; |
177 | __le16 num_pg; | |
178 | __le16 fpg_sz; | |
179 | __le16 csecs; | |
180 | __le16 sos; | |
36d5dbc6 | 181 | __le16 rsvd2; |
ca064085 MB |
182 | __le32 trdt; |
183 | __le32 trdm; | |
184 | __le32 tprt; | |
185 | __le32 tprm; | |
186 | __le32 tbet; | |
187 | __le32 tbem; | |
188 | __le32 mpos; | |
12be5edf | 189 | __le32 mccap; |
ca064085 | 190 | __le16 cpar; |
ca5927e7 MB |
191 | __u8 reserved[10]; |
192 | struct nvme_nvm_lp_tbl lptbl; | |
ca064085 MB |
193 | } __packed; |
194 | ||
195 | struct nvme_nvm_addr_format { | |
196 | __u8 ch_offset; | |
197 | __u8 ch_len; | |
198 | __u8 lun_offset; | |
199 | __u8 lun_len; | |
200 | __u8 pln_offset; | |
201 | __u8 pln_len; | |
202 | __u8 blk_offset; | |
203 | __u8 blk_len; | |
204 | __u8 pg_offset; | |
205 | __u8 pg_len; | |
206 | __u8 sect_offset; | |
207 | __u8 sect_len; | |
208 | __u8 res[4]; | |
209 | } __packed; | |
210 | ||
211 | struct nvme_nvm_id { | |
212 | __u8 ver_id; | |
213 | __u8 vmnt; | |
214 | __u8 cgrps; | |
dad1b009 | 215 | __u8 res; |
ca064085 MB |
216 | __le32 cap; |
217 | __le32 dom; | |
218 | struct nvme_nvm_addr_format ppaf; | |
dad1b009 | 219 | __u8 resv[228]; |
ca064085 MB |
220 | struct nvme_nvm_id_group groups[4]; |
221 | } __packed; | |
222 | ||
11450469 MB |
223 | struct nvme_nvm_bb_tbl { |
224 | __u8 tblid[4]; | |
225 | __le16 verid; | |
226 | __le16 revid; | |
227 | __le32 rvsd1; | |
228 | __le32 tblks; | |
229 | __le32 tfact; | |
230 | __le32 tgrown; | |
231 | __le32 tdresv; | |
232 | __le32 thresv; | |
233 | __le32 rsvd2[8]; | |
234 | __u8 blk[0]; | |
235 | }; | |
236 | ||
ca064085 MB |
237 | /* |
238 | * Check we didn't inadvertently grow the command struct | |
239 | */ | |
240 | static inline void _nvme_nvm_check_size(void) | |
241 | { | |
242 | BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64); | |
243 | BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64); | |
244 | BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64); | |
11450469 MB |
245 | BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64); |
246 | BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64); | |
ca064085 MB |
247 | BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64); |
248 | BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64); | |
249 | BUILD_BUG_ON(sizeof(struct nvme_nvm_id_group) != 960); | |
250 | BUILD_BUG_ON(sizeof(struct nvme_nvm_addr_format) != 128); | |
251 | BUILD_BUG_ON(sizeof(struct nvme_nvm_id) != 4096); | |
11450469 | 252 | BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 512); |
ca064085 MB |
253 | } |
254 | ||
255 | static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id) | |
256 | { | |
257 | struct nvme_nvm_id_group *src; | |
258 | struct nvm_id_group *dst; | |
259 | int i, end; | |
260 | ||
261 | end = min_t(u32, 4, nvm_id->cgrps); | |
262 | ||
263 | for (i = 0; i < end; i++) { | |
264 | src = &nvme_nvm_id->groups[i]; | |
265 | dst = &nvm_id->groups[i]; | |
266 | ||
267 | dst->mtype = src->mtype; | |
268 | dst->fmtype = src->fmtype; | |
269 | dst->num_ch = src->num_ch; | |
270 | dst->num_lun = src->num_lun; | |
271 | dst->num_pln = src->num_pln; | |
272 | ||
273 | dst->num_pg = le16_to_cpu(src->num_pg); | |
274 | dst->num_blk = le16_to_cpu(src->num_blk); | |
275 | dst->fpg_sz = le16_to_cpu(src->fpg_sz); | |
276 | dst->csecs = le16_to_cpu(src->csecs); | |
277 | dst->sos = le16_to_cpu(src->sos); | |
278 | ||
279 | dst->trdt = le32_to_cpu(src->trdt); | |
280 | dst->trdm = le32_to_cpu(src->trdm); | |
281 | dst->tprt = le32_to_cpu(src->tprt); | |
282 | dst->tprm = le32_to_cpu(src->tprm); | |
283 | dst->tbet = le32_to_cpu(src->tbet); | |
284 | dst->tbem = le32_to_cpu(src->tbem); | |
285 | dst->mpos = le32_to_cpu(src->mpos); | |
12be5edf | 286 | dst->mccap = le32_to_cpu(src->mccap); |
ca064085 MB |
287 | |
288 | dst->cpar = le16_to_cpu(src->cpar); | |
ca5927e7 MB |
289 | |
290 | if (dst->fmtype == NVM_ID_FMTYPE_MLC) { | |
291 | memcpy(dst->lptbl.id, src->lptbl.id, 8); | |
292 | dst->lptbl.mlc.num_pairs = | |
293 | le16_to_cpu(src->lptbl.mlc.num_pairs); | |
6dde1d6c MB |
294 | |
295 | if (dst->lptbl.mlc.num_pairs > NVME_NVM_LP_MLC_PAIRS) { | |
296 | pr_err("nvm: number of MLC pairs not supported\n"); | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
ca5927e7 | 300 | memcpy(dst->lptbl.mlc.pairs, src->lptbl.mlc.pairs, |
6dde1d6c | 301 | dst->lptbl.mlc.num_pairs); |
ca5927e7 | 302 | } |
ca064085 MB |
303 | } |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
16f26c3a | 308 | static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id) |
ca064085 | 309 | { |
16f26c3a | 310 | struct nvme_ns *ns = nvmdev->q->queuedata; |
ca064085 MB |
311 | struct nvme_nvm_id *nvme_nvm_id; |
312 | struct nvme_nvm_command c = {}; | |
313 | int ret; | |
314 | ||
315 | c.identity.opcode = nvme_nvm_admin_identity; | |
316 | c.identity.nsid = cpu_to_le32(ns->ns_id); | |
317 | c.identity.chnl_off = 0; | |
318 | ||
319 | nvme_nvm_id = kmalloc(sizeof(struct nvme_nvm_id), GFP_KERNEL); | |
320 | if (!nvme_nvm_id) | |
321 | return -ENOMEM; | |
322 | ||
ac02ddde | 323 | ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c, |
47b3115a | 324 | nvme_nvm_id, sizeof(struct nvme_nvm_id)); |
ca064085 MB |
325 | if (ret) { |
326 | ret = -EIO; | |
327 | goto out; | |
328 | } | |
329 | ||
330 | nvm_id->ver_id = nvme_nvm_id->ver_id; | |
331 | nvm_id->vmnt = nvme_nvm_id->vmnt; | |
332 | nvm_id->cgrps = nvme_nvm_id->cgrps; | |
333 | nvm_id->cap = le32_to_cpu(nvme_nvm_id->cap); | |
334 | nvm_id->dom = le32_to_cpu(nvme_nvm_id->dom); | |
2393bd39 MB |
335 | memcpy(&nvm_id->ppaf, &nvme_nvm_id->ppaf, |
336 | sizeof(struct nvme_nvm_addr_format)); | |
ca064085 MB |
337 | |
338 | ret = init_grps(nvm_id, nvme_nvm_id); | |
339 | out: | |
340 | kfree(nvme_nvm_id); | |
341 | return ret; | |
342 | } | |
343 | ||
16f26c3a | 344 | static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb, |
ca064085 MB |
345 | nvm_l2p_update_fn *update_l2p, void *priv) |
346 | { | |
16f26c3a | 347 | struct nvme_ns *ns = nvmdev->q->queuedata; |
ca064085 | 348 | struct nvme_nvm_command c = {}; |
ac02ddde | 349 | u32 len = queue_max_hw_sectors(ns->ctrl->admin_q) << 9; |
5f436e5e | 350 | u32 nlb_pr_rq = len / sizeof(u64); |
ca064085 MB |
351 | u64 cmd_slba = slba; |
352 | void *entries; | |
353 | int ret = 0; | |
354 | ||
355 | c.l2p.opcode = nvme_nvm_admin_get_l2p_tbl; | |
356 | c.l2p.nsid = cpu_to_le32(ns->ns_id); | |
357 | entries = kmalloc(len, GFP_KERNEL); | |
358 | if (!entries) | |
359 | return -ENOMEM; | |
360 | ||
361 | while (nlb) { | |
5f436e5e | 362 | u32 cmd_nlb = min(nlb_pr_rq, nlb); |
ca064085 MB |
363 | |
364 | c.l2p.slba = cpu_to_le64(cmd_slba); | |
365 | c.l2p.nlb = cpu_to_le32(cmd_nlb); | |
366 | ||
ac02ddde | 367 | ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, |
47b3115a | 368 | (struct nvme_command *)&c, entries, len); |
ca064085 | 369 | if (ret) { |
b86d8d36 SG |
370 | dev_err(ns->ctrl->device, |
371 | "L2P table transfer failed (%d)\n", ret); | |
ca064085 MB |
372 | ret = -EIO; |
373 | goto out; | |
374 | } | |
375 | ||
376 | if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) { | |
377 | ret = -EINTR; | |
378 | goto out; | |
379 | } | |
380 | ||
381 | cmd_slba += cmd_nlb; | |
382 | nlb -= cmd_nlb; | |
383 | } | |
384 | ||
385 | out: | |
386 | kfree(entries); | |
387 | return ret; | |
388 | } | |
389 | ||
08236c6b | 390 | static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa, |
e11903f5 | 391 | u8 *blks) |
ca064085 | 392 | { |
08236c6b | 393 | struct request_queue *q = nvmdev->q; |
ca064085 | 394 | struct nvme_ns *ns = q->queuedata; |
ac02ddde | 395 | struct nvme_ctrl *ctrl = ns->ctrl; |
ca064085 | 396 | struct nvme_nvm_command c = {}; |
11450469 | 397 | struct nvme_nvm_bb_tbl *bb_tbl; |
22e8c976 MB |
398 | int nr_blks = nvmdev->blks_per_lun * nvmdev->plane_mode; |
399 | int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks; | |
ca064085 MB |
400 | int ret = 0; |
401 | ||
402 | c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl; | |
403 | c.get_bb.nsid = cpu_to_le32(ns->ns_id); | |
11450469 | 404 | c.get_bb.spba = cpu_to_le64(ppa.ppa); |
ca064085 | 405 | |
11450469 MB |
406 | bb_tbl = kzalloc(tblsz, GFP_KERNEL); |
407 | if (!bb_tbl) | |
408 | return -ENOMEM; | |
ca064085 | 409 | |
ac02ddde | 410 | ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c, |
47b3115a | 411 | bb_tbl, tblsz); |
ca064085 | 412 | if (ret) { |
b86d8d36 | 413 | dev_err(ctrl->device, "get bad block table failed (%d)\n", ret); |
ca064085 MB |
414 | ret = -EIO; |
415 | goto out; | |
416 | } | |
417 | ||
11450469 MB |
418 | if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' || |
419 | bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') { | |
b86d8d36 | 420 | dev_err(ctrl->device, "bbt format mismatch\n"); |
11450469 MB |
421 | ret = -EINVAL; |
422 | goto out; | |
423 | } | |
424 | ||
425 | if (le16_to_cpu(bb_tbl->verid) != 1) { | |
426 | ret = -EINVAL; | |
b86d8d36 | 427 | dev_err(ctrl->device, "bbt version not supported\n"); |
11450469 MB |
428 | goto out; |
429 | } | |
430 | ||
22e8c976 | 431 | if (le32_to_cpu(bb_tbl->tblks) != nr_blks) { |
11450469 | 432 | ret = -EINVAL; |
b86d8d36 SG |
433 | dev_err(ctrl->device, |
434 | "bbt unsuspected blocks returned (%u!=%u)", | |
22e8c976 | 435 | le32_to_cpu(bb_tbl->tblks), nr_blks); |
11450469 MB |
436 | goto out; |
437 | } | |
438 | ||
e11903f5 | 439 | memcpy(blks, bb_tbl->blk, nvmdev->blks_per_lun * nvmdev->plane_mode); |
ca064085 | 440 | out: |
11450469 MB |
441 | kfree(bb_tbl); |
442 | return ret; | |
443 | } | |
444 | ||
00ee6cc3 MB |
445 | static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas, |
446 | int nr_ppas, int type) | |
11450469 | 447 | { |
16f26c3a | 448 | struct nvme_ns *ns = nvmdev->q->queuedata; |
11450469 MB |
449 | struct nvme_nvm_command c = {}; |
450 | int ret = 0; | |
451 | ||
452 | c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl; | |
453 | c.set_bb.nsid = cpu_to_le32(ns->ns_id); | |
00ee6cc3 MB |
454 | c.set_bb.spba = cpu_to_le64(ppas->ppa); |
455 | c.set_bb.nlb = cpu_to_le16(nr_ppas - 1); | |
11450469 MB |
456 | c.set_bb.value = type; |
457 | ||
ac02ddde | 458 | ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c, |
47b3115a | 459 | NULL, 0); |
11450469 | 460 | if (ret) |
b86d8d36 SG |
461 | dev_err(ns->ctrl->device, "set bad block table failed (%d)\n", |
462 | ret); | |
ca064085 MB |
463 | return ret; |
464 | } | |
465 | ||
466 | static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd, | |
467 | struct nvme_ns *ns, struct nvme_nvm_command *c) | |
468 | { | |
469 | c->ph_rw.opcode = rqd->opcode; | |
470 | c->ph_rw.nsid = cpu_to_le32(ns->ns_id); | |
471 | c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa); | |
45bbd052 | 472 | c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list); |
ca064085 | 473 | c->ph_rw.control = cpu_to_le16(rqd->flags); |
6d5be959 | 474 | c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1); |
ca064085 MB |
475 | |
476 | if (rqd->opcode == NVM_OP_HBWRITE || rqd->opcode == NVM_OP_HBREAD) | |
477 | c->hb_rw.slba = cpu_to_le64(nvme_block_nr(ns, | |
478 | rqd->bio->bi_iter.bi_sector)); | |
479 | } | |
480 | ||
481 | static void nvme_nvm_end_io(struct request *rq, int error) | |
482 | { | |
483 | struct nvm_rq *rqd = rq->end_io_data; | |
9f867268 MB |
484 | struct nvme_nvm_completion *cqe = rq->special; |
485 | ||
486 | if (cqe) | |
487 | rqd->ppa_status = le64_to_cpu(cqe->result); | |
ca064085 | 488 | |
91276162 | 489 | nvm_end_io(rqd, error); |
ca064085 MB |
490 | |
491 | kfree(rq->cmd); | |
492 | blk_mq_free_request(rq); | |
493 | } | |
494 | ||
16f26c3a | 495 | static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) |
ca064085 | 496 | { |
16f26c3a | 497 | struct request_queue *q = dev->q; |
ca064085 MB |
498 | struct nvme_ns *ns = q->queuedata; |
499 | struct request *rq; | |
500 | struct bio *bio = rqd->bio; | |
501 | struct nvme_nvm_command *cmd; | |
502 | ||
70246286 | 503 | rq = blk_mq_alloc_request(q, bio_data_dir(bio), 0); |
ca064085 MB |
504 | if (IS_ERR(rq)) |
505 | return -ENOMEM; | |
506 | ||
9f867268 MB |
507 | cmd = kzalloc(sizeof(struct nvme_nvm_command) + |
508 | sizeof(struct nvme_nvm_completion), GFP_KERNEL); | |
ca064085 MB |
509 | if (!cmd) { |
510 | blk_mq_free_request(rq); | |
511 | return -ENOMEM; | |
512 | } | |
513 | ||
514 | rq->cmd_type = REQ_TYPE_DRV_PRIV; | |
515 | rq->ioprio = bio_prio(bio); | |
516 | ||
517 | if (bio_has_data(bio)) | |
518 | rq->nr_phys_segments = bio_phys_segments(q, bio); | |
519 | ||
520 | rq->__data_len = bio->bi_iter.bi_size; | |
521 | rq->bio = rq->biotail = bio; | |
522 | ||
523 | nvme_nvm_rqtocmd(rq, rqd, ns, cmd); | |
524 | ||
525 | rq->cmd = (unsigned char *)cmd; | |
526 | rq->cmd_len = sizeof(struct nvme_nvm_command); | |
9f867268 | 527 | rq->special = cmd + 1; |
ca064085 MB |
528 | |
529 | rq->end_io_data = rqd; | |
530 | ||
531 | blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
16f26c3a | 536 | static int nvme_nvm_erase_block(struct nvm_dev *dev, struct nvm_rq *rqd) |
ca064085 | 537 | { |
16f26c3a | 538 | struct request_queue *q = dev->q; |
ca064085 MB |
539 | struct nvme_ns *ns = q->queuedata; |
540 | struct nvme_nvm_command c = {}; | |
541 | ||
542 | c.erase.opcode = NVM_OP_ERASE; | |
543 | c.erase.nsid = cpu_to_le32(ns->ns_id); | |
544 | c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa); | |
6d5be959 | 545 | c.erase.length = cpu_to_le16(rqd->nr_ppas - 1); |
ca064085 MB |
546 | |
547 | return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0); | |
548 | } | |
549 | ||
16f26c3a | 550 | static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name) |
ca064085 | 551 | { |
16f26c3a | 552 | struct nvme_ns *ns = nvmdev->q->queuedata; |
ca064085 | 553 | |
ac02ddde | 554 | return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0); |
ca064085 MB |
555 | } |
556 | ||
557 | static void nvme_nvm_destroy_dma_pool(void *pool) | |
558 | { | |
559 | struct dma_pool *dma_pool = pool; | |
560 | ||
561 | dma_pool_destroy(dma_pool); | |
562 | } | |
563 | ||
16f26c3a | 564 | static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool, |
ca064085 MB |
565 | gfp_t mem_flags, dma_addr_t *dma_handler) |
566 | { | |
567 | return dma_pool_alloc(pool, mem_flags, dma_handler); | |
568 | } | |
569 | ||
75b85649 | 570 | static void nvme_nvm_dev_dma_free(void *pool, void *addr, |
ca064085 MB |
571 | dma_addr_t dma_handler) |
572 | { | |
75b85649 | 573 | dma_pool_free(pool, addr, dma_handler); |
ca064085 MB |
574 | } |
575 | ||
576 | static struct nvm_dev_ops nvme_nvm_dev_ops = { | |
577 | .identity = nvme_nvm_identity, | |
578 | ||
579 | .get_l2p_tbl = nvme_nvm_get_l2p_tbl, | |
580 | ||
581 | .get_bb_tbl = nvme_nvm_get_bb_tbl, | |
11450469 | 582 | .set_bb_tbl = nvme_nvm_set_bb_tbl, |
ca064085 MB |
583 | |
584 | .submit_io = nvme_nvm_submit_io, | |
585 | .erase_block = nvme_nvm_erase_block, | |
586 | ||
587 | .create_dma_pool = nvme_nvm_create_dma_pool, | |
588 | .destroy_dma_pool = nvme_nvm_destroy_dma_pool, | |
589 | .dev_dma_alloc = nvme_nvm_dev_dma_alloc, | |
590 | .dev_dma_free = nvme_nvm_dev_dma_free, | |
591 | ||
592 | .max_phys_sect = 64, | |
593 | }; | |
594 | ||
595 | int nvme_nvm_register(struct request_queue *q, char *disk_name) | |
596 | { | |
597 | return nvm_register(q, disk_name, &nvme_nvm_dev_ops); | |
598 | } | |
599 | ||
600 | void nvme_nvm_unregister(struct request_queue *q, char *disk_name) | |
601 | { | |
602 | nvm_unregister(disk_name); | |
603 | } | |
604 | ||
09f2e716 MB |
605 | /* move to shared place when used in multiple places. */ |
606 | #define PCI_VENDOR_ID_CNEX 0x1d1d | |
607 | #define PCI_DEVICE_ID_CNEX_WL 0x2807 | |
608 | #define PCI_DEVICE_ID_CNEX_QEMU 0x1f1f | |
609 | ||
ca064085 MB |
610 | int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id) |
611 | { | |
ac02ddde CH |
612 | struct nvme_ctrl *ctrl = ns->ctrl; |
613 | /* XXX: this is poking into PCI structures from generic code! */ | |
614 | struct pci_dev *pdev = to_pci_dev(ctrl->dev); | |
ca064085 MB |
615 | |
616 | /* QEMU NVMe simulator - PCI ID + Vendor specific bit */ | |
09f2e716 MB |
617 | if (pdev->vendor == PCI_VENDOR_ID_CNEX && |
618 | pdev->device == PCI_DEVICE_ID_CNEX_QEMU && | |
ca064085 MB |
619 | id->vs[0] == 0x1) |
620 | return 1; | |
621 | ||
622 | /* CNEX Labs - PCI ID + Vendor specific bit */ | |
09f2e716 MB |
623 | if (pdev->vendor == PCI_VENDOR_ID_CNEX && |
624 | pdev->device == PCI_DEVICE_ID_CNEX_WL && | |
ca064085 MB |
625 | id->vs[0] == 0x1) |
626 | return 1; | |
627 | ||
628 | return 0; | |
629 | } |