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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / nvme / host / lightnvm.c
bloba4f3b263cd6c60ee0a77498fdf590ee95d5b8f8b
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
25 #include <linux/nvme.h>
26 #include <linux/bitops.h>
27 #include <linux/lightnvm.h>
28 #include <linux/vmalloc.h>
29 #include <linux/sched/sysctl.h>
30 #include <uapi/linux/lightnvm.h>
31
32 enum nvme_nvm_admin_opcode {
33 nvme_nvm_admin_identity = 0xe2,
34 nvme_nvm_admin_get_bb_tbl = 0xf2,
35 nvme_nvm_admin_set_bb_tbl = 0xf1,
36 };
37
38 enum nvme_nvm_log_page {
39 NVME_NVM_LOG_REPORT_CHUNK = 0xca,
40 };
41
42 struct nvme_nvm_ph_rw {
43 __u8 opcode;
44 __u8 flags;
45 __u16 command_id;
46 __le32 nsid;
47 __u64 rsvd2;
48 __le64 metadata;
49 __le64 prp1;
50 __le64 prp2;
51 __le64 spba;
52 __le16 length;
53 __le16 control;
54 __le32 dsmgmt;
55 __le64 resv;
56 };
57
58 struct nvme_nvm_erase_blk {
59 __u8 opcode;
60 __u8 flags;
61 __u16 command_id;
62 __le32 nsid;
63 __u64 rsvd[2];
64 __le64 prp1;
65 __le64 prp2;
66 __le64 spba;
67 __le16 length;
68 __le16 control;
69 __le32 dsmgmt;
70 __le64 resv;
71 };
72
73 struct nvme_nvm_identity {
74 __u8 opcode;
75 __u8 flags;
76 __u16 command_id;
77 __le32 nsid;
78 __u64 rsvd[2];
79 __le64 prp1;
80 __le64 prp2;
81 __u32 rsvd11[6];
82 };
83
84 struct nvme_nvm_getbbtbl {
85 __u8 opcode;
86 __u8 flags;
87 __u16 command_id;
88 __le32 nsid;
89 __u64 rsvd[2];
90 __le64 prp1;
91 __le64 prp2;
92 __le64 spba;
93 __u32 rsvd4[4];
94 };
95
96 struct nvme_nvm_setbbtbl {
97 __u8 opcode;
98 __u8 flags;
99 __u16 command_id;
100 __le32 nsid;
101 __le64 rsvd[2];
102 __le64 prp1;
103 __le64 prp2;
104 __le64 spba;
105 __le16 nlb;
106 __u8 value;
107 __u8 rsvd3;
108 __u32 rsvd4[3];
109 };
110
111 struct nvme_nvm_command {
112 union {
113 struct nvme_common_command common;
114 struct nvme_nvm_ph_rw ph_rw;
115 struct nvme_nvm_erase_blk erase;
116 struct nvme_nvm_identity identity;
117 struct nvme_nvm_getbbtbl get_bb;
118 struct nvme_nvm_setbbtbl set_bb;
119 };
120 };
121
122 struct nvme_nvm_id12_grp {
123 __u8 mtype;
124 __u8 fmtype;
125 __le16 res16;
126 __u8 num_ch;
127 __u8 num_lun;
128 __u8 num_pln;
129 __u8 rsvd1;
130 __le16 num_chk;
131 __le16 num_pg;
132 __le16 fpg_sz;
133 __le16 csecs;
134 __le16 sos;
135 __le16 rsvd2;
136 __le32 trdt;
137 __le32 trdm;
138 __le32 tprt;
139 __le32 tprm;
140 __le32 tbet;
141 __le32 tbem;
142 __le32 mpos;
143 __le32 mccap;
144 __le16 cpar;
145 __u8 reserved[906];
146 } __packed;
147
148 struct nvme_nvm_id12_addrf {
149 __u8 ch_offset;
150 __u8 ch_len;
151 __u8 lun_offset;
152 __u8 lun_len;
153 __u8 pln_offset;
154 __u8 pln_len;
155 __u8 blk_offset;
156 __u8 blk_len;
157 __u8 pg_offset;
158 __u8 pg_len;
159 __u8 sec_offset;
160 __u8 sec_len;
161 __u8 res[4];
162 } __packed;
163
164 struct nvme_nvm_id12 {
165 __u8 ver_id;
166 __u8 vmnt;
167 __u8 cgrps;
168 __u8 res;
169 __le32 cap;
170 __le32 dom;
171 struct nvme_nvm_id12_addrf ppaf;
172 __u8 resv[228];
173 struct nvme_nvm_id12_grp grp;
174 __u8 resv2[2880];
175 } __packed;
176
177 struct nvme_nvm_bb_tbl {
178 __u8 tblid[4];
179 __le16 verid;
180 __le16 revid;
181 __le32 rvsd1;
182 __le32 tblks;
183 __le32 tfact;
184 __le32 tgrown;
185 __le32 tdresv;
186 __le32 thresv;
187 __le32 rsvd2[8];
188 __u8 blk[0];
189 };
190
191 struct nvme_nvm_id20_addrf {
192 __u8 grp_len;
193 __u8 pu_len;
194 __u8 chk_len;
195 __u8 lba_len;
196 __u8 resv[4];
197 };
198
199 struct nvme_nvm_id20 {
200 __u8 mjr;
201 __u8 mnr;
202 __u8 resv[6];
203
204 struct nvme_nvm_id20_addrf lbaf;
205
206 __le32 mccap;
207 __u8 resv2[12];
208
209 __u8 wit;
210 __u8 resv3[31];
211
212 /* Geometry */
213 __le16 num_grp;
214 __le16 num_pu;
215 __le32 num_chk;
216 __le32 clba;
217 __u8 resv4[52];
218
219 /* Write data requirements */
220 __le32 ws_min;
221 __le32 ws_opt;
222 __le32 mw_cunits;
223 __le32 maxoc;
224 __le32 maxocpu;
225 __u8 resv5[44];
226
227 /* Performance related metrics */
228 __le32 trdt;
229 __le32 trdm;
230 __le32 twrt;
231 __le32 twrm;
232 __le32 tcrst;
233 __le32 tcrsm;
234 __u8 resv6[40];
235
236 /* Reserved area */
237 __u8 resv7[2816];
238
239 /* Vendor specific */
240 __u8 vs[1024];
241 };
242
243 struct nvme_nvm_chk_meta {
244 __u8 state;
245 __u8 type;
246 __u8 wi;
247 __u8 rsvd[5];
248 __le64 slba;
249 __le64 cnlb;
250 __le64 wp;
251 };
252
253 /*
254 * Check we didn't inadvertently grow the command struct
255 */
256 static inline void _nvme_nvm_check_size(void)
257 {
258 BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
259 BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
260 BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
261 BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
262 BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
263 BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_grp) != 960);
264 BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_addrf) != 16);
265 BUILD_BUG_ON(sizeof(struct nvme_nvm_id12) != NVME_IDENTIFY_DATA_SIZE);
266 BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 64);
267 BUILD_BUG_ON(sizeof(struct nvme_nvm_id20_addrf) != 8);
268 BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE);
269 BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) != 32);
270 BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) !=
271 sizeof(struct nvm_chk_meta));
272 }
273
274 static void nvme_nvm_set_addr_12(struct nvm_addrf_12 *dst,
275 struct nvme_nvm_id12_addrf *src)
276 {
277 dst->ch_len = src->ch_len;
278 dst->lun_len = src->lun_len;
279 dst->blk_len = src->blk_len;
280 dst->pg_len = src->pg_len;
281 dst->pln_len = src->pln_len;
282 dst->sec_len = src->sec_len;
283
284 dst->ch_offset = src->ch_offset;
285 dst->lun_offset = src->lun_offset;
286 dst->blk_offset = src->blk_offset;
287 dst->pg_offset = src->pg_offset;
288 dst->pln_offset = src->pln_offset;
289 dst->sec_offset = src->sec_offset;
290
291 dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
292 dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
293 dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset;
294 dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset;
295 dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset;
296 dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
297 }
298
299 static int nvme_nvm_setup_12(struct nvme_nvm_id12 *id,
300 struct nvm_geo *geo)
301 {
302 struct nvme_nvm_id12_grp *src;
303 int sec_per_pg, sec_per_pl, pg_per_blk;
304
305 if (id->cgrps != 1)
306 return -EINVAL;
307
308 src = &id->grp;
309
310 if (src->mtype != 0) {
311 pr_err("nvm: memory type not supported\n");
312 return -EINVAL;
313 }
314
315 /* 1.2 spec. only reports a single version id - unfold */
316 geo->major_ver_id = id->ver_id;
317 geo->minor_ver_id = 2;
318
319 /* Set compacted version for upper layers */
320 geo->version = NVM_OCSSD_SPEC_12;
321
322 geo->num_ch = src->num_ch;
323 geo->num_lun = src->num_lun;
324 geo->all_luns = geo->num_ch * geo->num_lun;
325
326 geo->num_chk = le16_to_cpu(src->num_chk);
327
328 geo->csecs = le16_to_cpu(src->csecs);
329 geo->sos = le16_to_cpu(src->sos);
330
331 pg_per_blk = le16_to_cpu(src->num_pg);
332 sec_per_pg = le16_to_cpu(src->fpg_sz) / geo->csecs;
333 sec_per_pl = sec_per_pg * src->num_pln;
334 geo->clba = sec_per_pl * pg_per_blk;
335
336 geo->all_chunks = geo->all_luns * geo->num_chk;
337 geo->total_secs = geo->clba * geo->all_chunks;
338
339 geo->ws_min = sec_per_pg;
340 geo->ws_opt = sec_per_pg;
341 geo->mw_cunits = geo->ws_opt << 3; /* default to MLC safe values */
342
343 /* Do not impose values for maximum number of open blocks as it is
344 * unspecified in 1.2. Users of 1.2 must be aware of this and eventually
345 * specify these values through a quirk if restrictions apply.
346 */
347 geo->maxoc = geo->all_luns * geo->num_chk;
348 geo->maxocpu = geo->num_chk;
349
350 geo->mccap = le32_to_cpu(src->mccap);
351
352 geo->trdt = le32_to_cpu(src->trdt);
353 geo->trdm = le32_to_cpu(src->trdm);
354 geo->tprt = le32_to_cpu(src->tprt);
355 geo->tprm = le32_to_cpu(src->tprm);
356 geo->tbet = le32_to_cpu(src->tbet);
357 geo->tbem = le32_to_cpu(src->tbem);
358
359 /* 1.2 compatibility */
360 geo->vmnt = id->vmnt;
361 geo->cap = le32_to_cpu(id->cap);
362 geo->dom = le32_to_cpu(id->dom);
363
364 geo->mtype = src->mtype;
365 geo->fmtype = src->fmtype;
366
367 geo->cpar = le16_to_cpu(src->cpar);
368 geo->mpos = le32_to_cpu(src->mpos);
369
370 geo->pln_mode = NVM_PLANE_SINGLE;
371
372 if (geo->mpos & 0x020202) {
373 geo->pln_mode = NVM_PLANE_DOUBLE;
374 geo->ws_opt <<= 1;
375 } else if (geo->mpos & 0x040404) {
376 geo->pln_mode = NVM_PLANE_QUAD;
377 geo->ws_opt <<= 2;
378 }
379
380 geo->num_pln = src->num_pln;
381 geo->num_pg = le16_to_cpu(src->num_pg);
382 geo->fpg_sz = le16_to_cpu(src->fpg_sz);
383
384 nvme_nvm_set_addr_12((struct nvm_addrf_12 *)&geo->addrf, &id->ppaf);
385
386 return 0;
387 }
388
389 static void nvme_nvm_set_addr_20(struct nvm_addrf *dst,
390 struct nvme_nvm_id20_addrf *src)
391 {
392 dst->ch_len = src->grp_len;
393 dst->lun_len = src->pu_len;
394 dst->chk_len = src->chk_len;
395 dst->sec_len = src->lba_len;
396
397 dst->sec_offset = 0;
398 dst->chk_offset = dst->sec_len;
399 dst->lun_offset = dst->chk_offset + dst->chk_len;
400 dst->ch_offset = dst->lun_offset + dst->lun_len;
401
402 dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
403 dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
404 dst->chk_mask = ((1ULL << dst->chk_len) - 1) << dst->chk_offset;
405 dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
406 }
407
408 static int nvme_nvm_setup_20(struct nvme_nvm_id20 *id,
409 struct nvm_geo *geo)
410 {
411 geo->major_ver_id = id->mjr;
412 geo->minor_ver_id = id->mnr;
413
414 /* Set compacted version for upper layers */
415 geo->version = NVM_OCSSD_SPEC_20;
416
417 geo->num_ch = le16_to_cpu(id->num_grp);
418 geo->num_lun = le16_to_cpu(id->num_pu);
419 geo->all_luns = geo->num_ch * geo->num_lun;
420
421 geo->num_chk = le32_to_cpu(id->num_chk);
422 geo->clba = le32_to_cpu(id->clba);
423
424 geo->all_chunks = geo->all_luns * geo->num_chk;
425 geo->total_secs = geo->clba * geo->all_chunks;
426
427 geo->ws_min = le32_to_cpu(id->ws_min);
428 geo->ws_opt = le32_to_cpu(id->ws_opt);
429 geo->mw_cunits = le32_to_cpu(id->mw_cunits);
430 geo->maxoc = le32_to_cpu(id->maxoc);
431 geo->maxocpu = le32_to_cpu(id->maxocpu);
432
433 geo->trdt = le32_to_cpu(id->trdt);
434 geo->trdm = le32_to_cpu(id->trdm);
435 geo->tprt = le32_to_cpu(id->twrt);
436 geo->tprm = le32_to_cpu(id->twrm);
437 geo->tbet = le32_to_cpu(id->tcrst);
438 geo->tbem = le32_to_cpu(id->tcrsm);
439
440 nvme_nvm_set_addr_20(&geo->addrf, &id->lbaf);
441
442 return 0;
443 }
444
445 static int nvme_nvm_identity(struct nvm_dev *nvmdev)
446 {
447 struct nvme_ns *ns = nvmdev->q->queuedata;
448 struct nvme_nvm_id12 *id;
449 struct nvme_nvm_command c = {};
450 int ret;
451
452 c.identity.opcode = nvme_nvm_admin_identity;
453 c.identity.nsid = cpu_to_le32(ns->head->ns_id);
454
455 id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL);
456 if (!id)
457 return -ENOMEM;
458
459 ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
460 id, sizeof(struct nvme_nvm_id12));
461 if (ret) {
462 ret = -EIO;
463 goto out;
464 }
465
466 /*
467 * The 1.2 and 2.0 specifications share the first byte in their geometry
468 * command to make it possible to know what version a device implements.
469 */
470 switch (id->ver_id) {
471 case 1:
472 ret = nvme_nvm_setup_12(id, &nvmdev->geo);
473 break;
474 case 2:
475 ret = nvme_nvm_setup_20((struct nvme_nvm_id20 *)id,
476 &nvmdev->geo);
477 break;
478 default:
479 dev_err(ns->ctrl->device, "OCSSD revision not supported (%d)\n",
480 id->ver_id);
481 ret = -EINVAL;
482 }
483
484 out:
485 kfree(id);
486 return ret;
487 }
488
489 static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
490 u8 *blks)
491 {
492 struct request_queue *q = nvmdev->q;
493 struct nvm_geo *geo = &nvmdev->geo;
494 struct nvme_ns *ns = q->queuedata;
495 struct nvme_ctrl *ctrl = ns->ctrl;
496 struct nvme_nvm_command c = {};
497 struct nvme_nvm_bb_tbl *bb_tbl;
498 int nr_blks = geo->num_chk * geo->num_pln;
499 int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
500 int ret = 0;
501
502 c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
503 c.get_bb.nsid = cpu_to_le32(ns->head->ns_id);
504 c.get_bb.spba = cpu_to_le64(ppa.ppa);
505
506 bb_tbl = kzalloc(tblsz, GFP_KERNEL);
507 if (!bb_tbl)
508 return -ENOMEM;
509
510 ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
511 bb_tbl, tblsz);
512 if (ret) {
513 dev_err(ctrl->device, "get bad block table failed (%d)\n", ret);
514 ret = -EIO;
515 goto out;
516 }
517
518 if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
519 bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
520 dev_err(ctrl->device, "bbt format mismatch\n");
521 ret = -EINVAL;
522 goto out;
523 }
524
525 if (le16_to_cpu(bb_tbl->verid) != 1) {
526 ret = -EINVAL;
527 dev_err(ctrl->device, "bbt version not supported\n");
528 goto out;
529 }
530
531 if (le32_to_cpu(bb_tbl->tblks) != nr_blks) {
532 ret = -EINVAL;
533 dev_err(ctrl->device,
534 "bbt unsuspected blocks returned (%u!=%u)",
535 le32_to_cpu(bb_tbl->tblks), nr_blks);
536 goto out;
537 }
538
539 memcpy(blks, bb_tbl->blk, geo->num_chk * geo->num_pln);
540 out:
541 kfree(bb_tbl);
542 return ret;
543 }
544
545 static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
546 int nr_ppas, int type)
547 {
548 struct nvme_ns *ns = nvmdev->q->queuedata;
549 struct nvme_nvm_command c = {};
550 int ret = 0;
551
552 c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
553 c.set_bb.nsid = cpu_to_le32(ns->head->ns_id);
554 c.set_bb.spba = cpu_to_le64(ppas->ppa);
555 c.set_bb.nlb = cpu_to_le16(nr_ppas - 1);
556 c.set_bb.value = type;
557
558 ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
559 NULL, 0);
560 if (ret)
561 dev_err(ns->ctrl->device, "set bad block table failed (%d)\n",
562 ret);
563 return ret;
564 }
565
566 /*
567 * Expect the lba in device format
568 */
569 static int nvme_nvm_get_chk_meta(struct nvm_dev *ndev,
570 sector_t slba, int nchks,
571 struct nvm_chk_meta *meta)
572 {
573 struct nvm_geo *geo = &ndev->geo;
574 struct nvme_ns *ns = ndev->q->queuedata;
575 struct nvme_ctrl *ctrl = ns->ctrl;
576 struct nvme_nvm_chk_meta *dev_meta, *dev_meta_off;
577 struct ppa_addr ppa;
578 size_t left = nchks * sizeof(struct nvme_nvm_chk_meta);
579 size_t log_pos, offset, len;
580 int ret, i, max_len;
581
582 /*
583 * limit requests to maximum 256K to avoid issuing arbitrary large
584 * requests when the device does not specific a maximum transfer size.
585 */
586 max_len = min_t(unsigned int, ctrl->max_hw_sectors << 9, 256 * 1024);
587
588 dev_meta = kmalloc(max_len, GFP_KERNEL);
589 if (!dev_meta)
590 return -ENOMEM;
591
592 /* Normalize lba address space to obtain log offset */
593 ppa.ppa = slba;
594 ppa = dev_to_generic_addr(ndev, ppa);
595
596 log_pos = ppa.m.chk;
597 log_pos += ppa.m.pu * geo->num_chk;
598 log_pos += ppa.m.grp * geo->num_lun * geo->num_chk;
599
600 offset = log_pos * sizeof(struct nvme_nvm_chk_meta);
601
602 while (left) {
603 len = min_t(unsigned int, left, max_len);
604
605 memset(dev_meta, 0, max_len);
606 dev_meta_off = dev_meta;
607
608 ret = nvme_get_log(ctrl, ns->head->ns_id,
609 NVME_NVM_LOG_REPORT_CHUNK, 0, dev_meta, len,
610 offset);
611 if (ret) {
612 dev_err(ctrl->device, "Get REPORT CHUNK log error\n");
613 break;
614 }
615
616 for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) {
617 meta->state = dev_meta_off->state;
618 meta->type = dev_meta_off->type;
619 meta->wi = dev_meta_off->wi;
620 meta->slba = le64_to_cpu(dev_meta_off->slba);
621 meta->cnlb = le64_to_cpu(dev_meta_off->cnlb);
622 meta->wp = le64_to_cpu(dev_meta_off->wp);
623
624 meta++;
625 dev_meta_off++;
626 }
627
628 offset += len;
629 left -= len;
630 }
631
632 kfree(dev_meta);
633
634 return ret;
635 }
636
637 static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
638 struct nvme_nvm_command *c)
639 {
640 c->ph_rw.opcode = rqd->opcode;
641 c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
642 c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
643 c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
644 c->ph_rw.control = cpu_to_le16(rqd->flags);
645 c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
646 }
647
648 static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
649 {
650 struct nvm_rq *rqd = rq->end_io_data;
651
652 rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
653 rqd->error = nvme_req(rq)->status;
654 nvm_end_io(rqd);
655
656 kfree(nvme_req(rq)->cmd);
657 blk_mq_free_request(rq);
658 }
659
660 static struct request *nvme_nvm_alloc_request(struct request_queue *q,
661 struct nvm_rq *rqd,
662 struct nvme_nvm_command *cmd)
663 {
664 struct nvme_ns *ns = q->queuedata;
665 struct request *rq;
666
667 nvme_nvm_rqtocmd(rqd, ns, cmd);
668
669 rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
670 if (IS_ERR(rq))
671 return rq;
672
673 rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
674
675 if (rqd->bio)
676 blk_init_request_from_bio(rq, rqd->bio);
677 else
678 rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
679
680 return rq;
681 }
682
683 static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
684 {
685 struct request_queue *q = dev->q;
686 struct nvme_nvm_command *cmd;
687 struct request *rq;
688
689 cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
690 if (!cmd)
691 return -ENOMEM;
692
693 rq = nvme_nvm_alloc_request(q, rqd, cmd);
694 if (IS_ERR(rq)) {
695 kfree(cmd);
696 return PTR_ERR(rq);
697 }
698
699 rq->end_io_data = rqd;
700
701 blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
702
703 return 0;
704 }
705
706 static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
707 {
708 struct request_queue *q = dev->q;
709 struct request *rq;
710 struct nvme_nvm_command cmd;
711 int ret = 0;
712
713 memset(&cmd, 0, sizeof(struct nvme_nvm_command));
714
715 rq = nvme_nvm_alloc_request(q, rqd, &cmd);
716 if (IS_ERR(rq))
717 return PTR_ERR(rq);
718
719 /* I/Os can fail and the error is signaled through rqd. Callers must
720 * handle the error accordingly.
721 */
722 blk_execute_rq(q, NULL, rq, 0);
723 if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
724 ret = -EINTR;
725
726 rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
727 rqd->error = nvme_req(rq)->status;
728
729 blk_mq_free_request(rq);
730
731 return ret;
732 }
733
734 static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
735 {
736 struct nvme_ns *ns = nvmdev->q->queuedata;
737
738 return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0);
739 }
740
741 static void nvme_nvm_destroy_dma_pool(void *pool)
742 {
743 struct dma_pool *dma_pool = pool;
744
745 dma_pool_destroy(dma_pool);
746 }
747
748 static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
749 gfp_t mem_flags, dma_addr_t *dma_handler)
750 {
751 return dma_pool_alloc(pool, mem_flags, dma_handler);
752 }
753
754 static void nvme_nvm_dev_dma_free(void *pool, void *addr,
755 dma_addr_t dma_handler)
756 {
757 dma_pool_free(pool, addr, dma_handler);
758 }
759
760 static struct nvm_dev_ops nvme_nvm_dev_ops = {
761 .identity = nvme_nvm_identity,
762
763 .get_bb_tbl = nvme_nvm_get_bb_tbl,
764 .set_bb_tbl = nvme_nvm_set_bb_tbl,
765
766 .get_chk_meta = nvme_nvm_get_chk_meta,
767
768 .submit_io = nvme_nvm_submit_io,
769 .submit_io_sync = nvme_nvm_submit_io_sync,
770
771 .create_dma_pool = nvme_nvm_create_dma_pool,
772 .destroy_dma_pool = nvme_nvm_destroy_dma_pool,
773 .dev_dma_alloc = nvme_nvm_dev_dma_alloc,
774 .dev_dma_free = nvme_nvm_dev_dma_free,
775 };
776
777 static int nvme_nvm_submit_user_cmd(struct request_queue *q,
778 struct nvme_ns *ns,
779 struct nvme_nvm_command *vcmd,
780 void __user *ubuf, unsigned int bufflen,
781 void __user *meta_buf, unsigned int meta_len,
782 void __user *ppa_buf, unsigned int ppa_len,
783 u32 *result, u64 *status, unsigned int timeout)
784 {
785 bool write = nvme_is_write((struct nvme_command *)vcmd);
786 struct nvm_dev *dev = ns->ndev;
787 struct gendisk *disk = ns->disk;
788 struct request *rq;
789 struct bio *bio = NULL;
790 __le64 *ppa_list = NULL;
791 dma_addr_t ppa_dma;
792 __le64 *metadata = NULL;
793 dma_addr_t metadata_dma;
794 DECLARE_COMPLETION_ONSTACK(wait);
795 int ret = 0;
796
797 rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
798 NVME_QID_ANY);
799 if (IS_ERR(rq)) {
800 ret = -ENOMEM;
801 goto err_cmd;
802 }
803
804 rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
805
806 if (ppa_buf && ppa_len) {
807 ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
808 if (!ppa_list) {
809 ret = -ENOMEM;
810 goto err_rq;
811 }
812 if (copy_from_user(ppa_list, (void __user *)ppa_buf,
813 sizeof(u64) * (ppa_len + 1))) {
814 ret = -EFAULT;
815 goto err_ppa;
816 }
817 vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
818 } else {
819 vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
820 }
821
822 if (ubuf && bufflen) {
823 ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
824 if (ret)
825 goto err_ppa;
826 bio = rq->bio;
827
828 if (meta_buf && meta_len) {
829 metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
830 &metadata_dma);
831 if (!metadata) {
832 ret = -ENOMEM;
833 goto err_map;
834 }
835
836 if (write) {
837 if (copy_from_user(metadata,
838 (void __user *)meta_buf,
839 meta_len)) {
840 ret = -EFAULT;
841 goto err_meta;
842 }
843 }
844 vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
845 }
846
847 bio->bi_disk = disk;
848 }
849
850 blk_execute_rq(q, NULL, rq, 0);
851
852 if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
853 ret = -EINTR;
854 else if (nvme_req(rq)->status & 0x7ff)
855 ret = -EIO;
856 if (result)
857 *result = nvme_req(rq)->status & 0x7ff;
858 if (status)
859 *status = le64_to_cpu(nvme_req(rq)->result.u64);
860
861 if (metadata && !ret && !write) {
862 if (copy_to_user(meta_buf, (void *)metadata, meta_len))
863 ret = -EFAULT;
864 }
865 err_meta:
866 if (meta_buf && meta_len)
867 dma_pool_free(dev->dma_pool, metadata, metadata_dma);
868 err_map:
869 if (bio)
870 blk_rq_unmap_user(bio);
871 err_ppa:
872 if (ppa_buf && ppa_len)
873 dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
874 err_rq:
875 blk_mq_free_request(rq);
876 err_cmd:
877 return ret;
878 }
879
880 static int nvme_nvm_submit_vio(struct nvme_ns *ns,
881 struct nvm_user_vio __user *uvio)
882 {
883 struct nvm_user_vio vio;
884 struct nvme_nvm_command c;
885 unsigned int length;
886 int ret;
887
888 if (copy_from_user(&vio, uvio, sizeof(vio)))
889 return -EFAULT;
890 if (vio.flags)
891 return -EINVAL;
892
893 memset(&c, 0, sizeof(c));
894 c.ph_rw.opcode = vio.opcode;
895 c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
896 c.ph_rw.control = cpu_to_le16(vio.control);
897 c.ph_rw.length = cpu_to_le16(vio.nppas);
898
899 length = (vio.nppas + 1) << ns->lba_shift;
900
901 ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
902 (void __user *)(uintptr_t)vio.addr, length,
903 (void __user *)(uintptr_t)vio.metadata,
904 vio.metadata_len,
905 (void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
906 &vio.result, &vio.status, 0);
907
908 if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
909 return -EFAULT;
910
911 return ret;
912 }
913
914 static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
915 struct nvm_passthru_vio __user *uvcmd)
916 {
917 struct nvm_passthru_vio vcmd;
918 struct nvme_nvm_command c;
919 struct request_queue *q;
920 unsigned int timeout = 0;
921 int ret;
922
923 if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
924 return -EFAULT;
925 if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
926 return -EACCES;
927 if (vcmd.flags)
928 return -EINVAL;
929
930 memset(&c, 0, sizeof(c));
931 c.common.opcode = vcmd.opcode;
932 c.common.nsid = cpu_to_le32(ns->head->ns_id);
933 c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
934 c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
935 /* cdw11-12 */
936 c.ph_rw.length = cpu_to_le16(vcmd.nppas);
937 c.ph_rw.control = cpu_to_le16(vcmd.control);
938 c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
939 c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
940 c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
941
942 if (vcmd.timeout_ms)
943 timeout = msecs_to_jiffies(vcmd.timeout_ms);
944
945 q = admin ? ns->ctrl->admin_q : ns->queue;
946
947 ret = nvme_nvm_submit_user_cmd(q, ns,
948 (struct nvme_nvm_command *)&c,
949 (void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
950 (void __user *)(uintptr_t)vcmd.metadata,
951 vcmd.metadata_len,
952 (void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
953 &vcmd.result, &vcmd.status, timeout);
954
955 if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
956 return -EFAULT;
957
958 return ret;
959 }
960
961 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
962 {
963 switch (cmd) {
964 case NVME_NVM_IOCTL_ADMIN_VIO:
965 return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg);
966 case NVME_NVM_IOCTL_IO_VIO:
967 return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg);
968 case NVME_NVM_IOCTL_SUBMIT_VIO:
969 return nvme_nvm_submit_vio(ns, (void __user *)arg);
970 default:
971 return -ENOTTY;
972 }
973 }
974
975 void nvme_nvm_update_nvm_info(struct nvme_ns *ns)
976 {
977 struct nvm_dev *ndev = ns->ndev;
978 struct nvm_geo *geo = &ndev->geo;
979
980 if (geo->version == NVM_OCSSD_SPEC_12)
981 return;
982
983 geo->csecs = 1 << ns->lba_shift;
984 geo->sos = ns->ms;
985 }
986
987 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
988 {
989 struct request_queue *q = ns->queue;
990 struct nvm_dev *dev;
991
992 _nvme_nvm_check_size();
993
994 dev = nvm_alloc_dev(node);
995 if (!dev)
996 return -ENOMEM;
997
998 dev->q = q;
999 memcpy(dev->name, disk_name, DISK_NAME_LEN);
1000 dev->ops = &nvme_nvm_dev_ops;
1001 dev->private_data = ns;
1002 ns->ndev = dev;
1003
1004 return nvm_register(dev);
1005 }
1006
1007 void nvme_nvm_unregister(struct nvme_ns *ns)
1008 {
1009 nvm_unregister(ns->ndev);
1010 }
1011
1012 static ssize_t nvm_dev_attr_show(struct device *dev,
1013 struct device_attribute *dattr, char *page)
1014 {
1015 struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1016 struct nvm_dev *ndev = ns->ndev;
1017 struct nvm_geo *geo = &ndev->geo;
1018 struct attribute *attr;
1019
1020 if (!ndev)
1021 return 0;
1022
1023 attr = &dattr->attr;
1024
1025 if (strcmp(attr->name, "version") == 0) {
1026 if (geo->major_ver_id == 1)
1027 return scnprintf(page, PAGE_SIZE, "%u\n",
1028 geo->major_ver_id);
1029 else
1030 return scnprintf(page, PAGE_SIZE, "%u.%u\n",
1031 geo->major_ver_id,
1032 geo->minor_ver_id);
1033 } else if (strcmp(attr->name, "capabilities") == 0) {
1034 return scnprintf(page, PAGE_SIZE, "%u\n", geo->cap);
1035 } else if (strcmp(attr->name, "read_typ") == 0) {
1036 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdt);
1037 } else if (strcmp(attr->name, "read_max") == 0) {
1038 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdm);
1039 } else {
1040 return scnprintf(page,
1041 PAGE_SIZE,
1042 "Unhandled attr(%s) in `%s`\n",
1043 attr->name, __func__);
1044 }
1045 }
1046
1047 static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addrf_12 *ppaf, char *page)
1048 {
1049 return scnprintf(page, PAGE_SIZE,
1050 "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1051 ppaf->ch_offset, ppaf->ch_len,
1052 ppaf->lun_offset, ppaf->lun_len,
1053 ppaf->pln_offset, ppaf->pln_len,
1054 ppaf->blk_offset, ppaf->blk_len,
1055 ppaf->pg_offset, ppaf->pg_len,
1056 ppaf->sec_offset, ppaf->sec_len);
1057 }
1058
1059 static ssize_t nvm_dev_attr_show_12(struct device *dev,
1060 struct device_attribute *dattr, char *page)
1061 {
1062 struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1063 struct nvm_dev *ndev = ns->ndev;
1064 struct nvm_geo *geo = &ndev->geo;
1065 struct attribute *attr;
1066
1067 if (!ndev)
1068 return 0;
1069
1070 attr = &dattr->attr;
1071
1072 if (strcmp(attr->name, "vendor_opcode") == 0) {
1073 return scnprintf(page, PAGE_SIZE, "%u\n", geo->vmnt);
1074 } else if (strcmp(attr->name, "device_mode") == 0) {
1075 return scnprintf(page, PAGE_SIZE, "%u\n", geo->dom);
1076 /* kept for compatibility */
1077 } else if (strcmp(attr->name, "media_manager") == 0) {
1078 return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
1079 } else if (strcmp(attr->name, "ppa_format") == 0) {
1080 return nvm_dev_attr_show_ppaf((void *)&geo->addrf, page);
1081 } else if (strcmp(attr->name, "media_type") == 0) { /* u8 */
1082 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mtype);
1083 } else if (strcmp(attr->name, "flash_media_type") == 0) {
1084 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fmtype);
1085 } else if (strcmp(attr->name, "num_channels") == 0) {
1086 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1087 } else if (strcmp(attr->name, "num_luns") == 0) {
1088 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1089 } else if (strcmp(attr->name, "num_planes") == 0) {
1090 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pln);
1091 } else if (strcmp(attr->name, "num_blocks") == 0) { /* u16 */
1092 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1093 } else if (strcmp(attr->name, "num_pages") == 0) {
1094 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pg);
1095 } else if (strcmp(attr->name, "page_size") == 0) {
1096 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fpg_sz);
1097 } else if (strcmp(attr->name, "hw_sector_size") == 0) {
1098 return scnprintf(page, PAGE_SIZE, "%u\n", geo->csecs);
1099 } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
1100 return scnprintf(page, PAGE_SIZE, "%u\n", geo->sos);
1101 } else if (strcmp(attr->name, "prog_typ") == 0) {
1102 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1103 } else if (strcmp(attr->name, "prog_max") == 0) {
1104 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1105 } else if (strcmp(attr->name, "erase_typ") == 0) {
1106 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1107 } else if (strcmp(attr->name, "erase_max") == 0) {
1108 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1109 } else if (strcmp(attr->name, "multiplane_modes") == 0) {
1110 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mpos);
1111 } else if (strcmp(attr->name, "media_capabilities") == 0) {
1112 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mccap);
1113 } else if (strcmp(attr->name, "max_phys_secs") == 0) {
1114 return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
1115 } else {
1116 return scnprintf(page, PAGE_SIZE,
1117 "Unhandled attr(%s) in `%s`\n",
1118 attr->name, __func__);
1119 }
1120 }
1121
1122 static ssize_t nvm_dev_attr_show_20(struct device *dev,
1123 struct device_attribute *dattr, char *page)
1124 {
1125 struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1126 struct nvm_dev *ndev = ns->ndev;
1127 struct nvm_geo *geo = &ndev->geo;
1128 struct attribute *attr;
1129
1130 if (!ndev)
1131 return 0;
1132
1133 attr = &dattr->attr;
1134
1135 if (strcmp(attr->name, "groups") == 0) {
1136 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1137 } else if (strcmp(attr->name, "punits") == 0) {
1138 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1139 } else if (strcmp(attr->name, "chunks") == 0) {
1140 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1141 } else if (strcmp(attr->name, "clba") == 0) {
1142 return scnprintf(page, PAGE_SIZE, "%u\n", geo->clba);
1143 } else if (strcmp(attr->name, "ws_min") == 0) {
1144 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_min);
1145 } else if (strcmp(attr->name, "ws_opt") == 0) {
1146 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_opt);
1147 } else if (strcmp(attr->name, "maxoc") == 0) {
1148 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxoc);
1149 } else if (strcmp(attr->name, "maxocpu") == 0) {
1150 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxocpu);
1151 } else if (strcmp(attr->name, "mw_cunits") == 0) {
1152 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mw_cunits);
1153 } else if (strcmp(attr->name, "write_typ") == 0) {
1154 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1155 } else if (strcmp(attr->name, "write_max") == 0) {
1156 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1157 } else if (strcmp(attr->name, "reset_typ") == 0) {
1158 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1159 } else if (strcmp(attr->name, "reset_max") == 0) {
1160 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1161 } else {
1162 return scnprintf(page, PAGE_SIZE,
1163 "Unhandled attr(%s) in `%s`\n",
1164 attr->name, __func__);
1165 }
1166 }
1167
1168 #define NVM_DEV_ATTR_RO(_name) \
1169 DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
1170 #define NVM_DEV_ATTR_12_RO(_name) \
1171 DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL)
1172 #define NVM_DEV_ATTR_20_RO(_name) \
1173 DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL)
1174
1175 /* general attributes */
1176 static NVM_DEV_ATTR_RO(version);
1177 static NVM_DEV_ATTR_RO(capabilities);
1178
1179 static NVM_DEV_ATTR_RO(read_typ);
1180 static NVM_DEV_ATTR_RO(read_max);
1181
1182 /* 1.2 values */
1183 static NVM_DEV_ATTR_12_RO(vendor_opcode);
1184 static NVM_DEV_ATTR_12_RO(device_mode);
1185 static NVM_DEV_ATTR_12_RO(ppa_format);
1186 static NVM_DEV_ATTR_12_RO(media_manager);
1187 static NVM_DEV_ATTR_12_RO(media_type);
1188 static NVM_DEV_ATTR_12_RO(flash_media_type);
1189 static NVM_DEV_ATTR_12_RO(num_channels);
1190 static NVM_DEV_ATTR_12_RO(num_luns);
1191 static NVM_DEV_ATTR_12_RO(num_planes);
1192 static NVM_DEV_ATTR_12_RO(num_blocks);
1193 static NVM_DEV_ATTR_12_RO(num_pages);
1194 static NVM_DEV_ATTR_12_RO(page_size);
1195 static NVM_DEV_ATTR_12_RO(hw_sector_size);
1196 static NVM_DEV_ATTR_12_RO(oob_sector_size);
1197 static NVM_DEV_ATTR_12_RO(prog_typ);
1198 static NVM_DEV_ATTR_12_RO(prog_max);
1199 static NVM_DEV_ATTR_12_RO(erase_typ);
1200 static NVM_DEV_ATTR_12_RO(erase_max);
1201 static NVM_DEV_ATTR_12_RO(multiplane_modes);
1202 static NVM_DEV_ATTR_12_RO(media_capabilities);
1203 static NVM_DEV_ATTR_12_RO(max_phys_secs);
1204
1205 /* 2.0 values */
1206 static NVM_DEV_ATTR_20_RO(groups);
1207 static NVM_DEV_ATTR_20_RO(punits);
1208 static NVM_DEV_ATTR_20_RO(chunks);
1209 static NVM_DEV_ATTR_20_RO(clba);
1210 static NVM_DEV_ATTR_20_RO(ws_min);
1211 static NVM_DEV_ATTR_20_RO(ws_opt);
1212 static NVM_DEV_ATTR_20_RO(maxoc);
1213 static NVM_DEV_ATTR_20_RO(maxocpu);
1214 static NVM_DEV_ATTR_20_RO(mw_cunits);
1215 static NVM_DEV_ATTR_20_RO(write_typ);
1216 static NVM_DEV_ATTR_20_RO(write_max);
1217 static NVM_DEV_ATTR_20_RO(reset_typ);
1218 static NVM_DEV_ATTR_20_RO(reset_max);
1219
1220 static struct attribute *nvm_dev_attrs[] = {
1221 /* version agnostic attrs */
1222 &dev_attr_version.attr,
1223 &dev_attr_capabilities.attr,
1224 &dev_attr_read_typ.attr,
1225 &dev_attr_read_max.attr,
1226
1227 /* 1.2 attrs */
1228 &dev_attr_vendor_opcode.attr,
1229 &dev_attr_device_mode.attr,
1230 &dev_attr_media_manager.attr,
1231 &dev_attr_ppa_format.attr,
1232 &dev_attr_media_type.attr,
1233 &dev_attr_flash_media_type.attr,
1234 &dev_attr_num_channels.attr,
1235 &dev_attr_num_luns.attr,
1236 &dev_attr_num_planes.attr,
1237 &dev_attr_num_blocks.attr,
1238 &dev_attr_num_pages.attr,
1239 &dev_attr_page_size.attr,
1240 &dev_attr_hw_sector_size.attr,
1241 &dev_attr_oob_sector_size.attr,
1242 &dev_attr_prog_typ.attr,
1243 &dev_attr_prog_max.attr,
1244 &dev_attr_erase_typ.attr,
1245 &dev_attr_erase_max.attr,
1246 &dev_attr_multiplane_modes.attr,
1247 &dev_attr_media_capabilities.attr,
1248 &dev_attr_max_phys_secs.attr,
1249
1250 /* 2.0 attrs */
1251 &dev_attr_groups.attr,
1252 &dev_attr_punits.attr,
1253 &dev_attr_chunks.attr,
1254 &dev_attr_clba.attr,
1255 &dev_attr_ws_min.attr,
1256 &dev_attr_ws_opt.attr,
1257 &dev_attr_maxoc.attr,
1258 &dev_attr_maxocpu.attr,
1259 &dev_attr_mw_cunits.attr,
1260
1261 &dev_attr_write_typ.attr,
1262 &dev_attr_write_max.attr,
1263 &dev_attr_reset_typ.attr,
1264 &dev_attr_reset_max.attr,
1265
1266 NULL,
1267 };
1268
1269 static umode_t nvm_dev_attrs_visible(struct kobject *kobj,
1270 struct attribute *attr, int index)
1271 {
1272 struct device *dev = container_of(kobj, struct device, kobj);
1273 struct gendisk *disk = dev_to_disk(dev);
1274 struct nvme_ns *ns = disk->private_data;
1275 struct nvm_dev *ndev = ns->ndev;
1276 struct device_attribute *dev_attr =
1277 container_of(attr, typeof(*dev_attr), attr);
1278
1279 if (!ndev)
1280 return 0;
1281
1282 if (dev_attr->show == nvm_dev_attr_show)
1283 return attr->mode;
1284
1285 switch (ndev->geo.major_ver_id) {
1286 case 1:
1287 if (dev_attr->show == nvm_dev_attr_show_12)
1288 return attr->mode;
1289 break;
1290 case 2:
1291 if (dev_attr->show == nvm_dev_attr_show_20)
1292 return attr->mode;
1293 break;
1294 }
1295
1296 return 0;
1297 }
1298
1299 const struct attribute_group nvme_nvm_attr_group = {
1300 .name = "lightnvm",
1301 .attrs = nvm_dev_attrs,
1302 .is_visible = nvm_dev_attrs_visible,
1303 };
Linux with added FPC-III support