drivers/nvme/host/lightnvm.c

   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 struct nvme_nvm_ph_rw {
  39         __u8                    opcode;
  40         __u8                    flags;
  41         __u16                   command_id;
  42         __le32                  nsid;
  43         __u64                   rsvd2;
  44         __le64                  metadata;
  45         __le64                  prp1;
  46         __le64                  prp2;
  47         __le64                  spba;
  48         __le16                  length;
  49         __le16                  control;
  50         __le32                  dsmgmt;
  51         __le64                  resv;
  52 };
  53
  54 struct nvme_nvm_erase_blk {
  55         __u8                    opcode;
  56         __u8                    flags;
  57         __u16                   command_id;
  58         __le32                  nsid;
  59         __u64                   rsvd[2];
  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         __u32                   rsvd11[6];
  78 };
  79
  80 struct nvme_nvm_getbbtbl {
  81         __u8                    opcode;
  82         __u8                    flags;
  83         __u16                   command_id;
  84         __le32                  nsid;
  85         __u64                   rsvd[2];
  86         __le64                  prp1;
  87         __le64                  prp2;
  88         __le64                  spba;
  89         __u32                   rsvd4[4];
  90 };
  91
  92 struct nvme_nvm_setbbtbl {
  93         __u8                    opcode;
  94         __u8                    flags;
  95         __u16                   command_id;
  96         __le32                  nsid;
  97         __le64                  rsvd[2];
  98         __le64                  prp1;
  99         __le64                  prp2;
 100         __le64                  spba;
 101         __le16                  nlb;
 102         __u8                    value;
 103         __u8                    rsvd3;
 104         __u32                   rsvd4[3];
 105 };
 106
 107 struct nvme_nvm_command {
 108         union {
 109                 struct nvme_common_command common;
 110                 struct nvme_nvm_ph_rw ph_rw;
 111                 struct nvme_nvm_erase_blk erase;
 112                 struct nvme_nvm_identity identity;
 113                 struct nvme_nvm_getbbtbl get_bb;
 114                 struct nvme_nvm_setbbtbl set_bb;
 115         };
 116 };
 117
 118 struct nvme_nvm_id12_grp {
 119         __u8                    mtype;
 120         __u8                    fmtype;
 121         __le16                  res16;
 122         __u8                    num_ch;
 123         __u8                    num_lun;
 124         __u8                    num_pln;
 125         __u8                    rsvd1;
 126         __le16                  num_chk;
 127         __le16                  num_pg;
 128         __le16                  fpg_sz;
 129         __le16                  csecs;
 130         __le16                  sos;
 131         __le16                  rsvd2;
 132         __le32                  trdt;
 133         __le32                  trdm;
 134         __le32                  tprt;
 135         __le32                  tprm;
 136         __le32                  tbet;
 137         __le32                  tbem;
 138         __le32                  mpos;
 139         __le32                  mccap;
 140         __le16                  cpar;
 141         __u8                    reserved[906];
 142 } __packed;
 143
 144 struct nvme_nvm_id12_addrf {
 145         __u8                    ch_offset;
 146         __u8                    ch_len;
 147         __u8                    lun_offset;
 148         __u8                    lun_len;
 149         __u8                    pln_offset;
 150         __u8                    pln_len;
 151         __u8                    blk_offset;
 152         __u8                    blk_len;
 153         __u8                    pg_offset;
 154         __u8                    pg_len;
 155         __u8                    sect_offset;
 156         __u8                    sect_len;
 157         __u8                    res[4];
 158 } __packed;
 159
 160 struct nvme_nvm_id12 {
 161         __u8                    ver_id;
 162         __u8                    vmnt;
 163         __u8                    cgrps;
 164         __u8                    res;
 165         __le32                  cap;
 166         __le32                  dom;
 167         struct nvme_nvm_id12_addrf ppaf;
 168         __u8                    resv[228];
 169         struct nvme_nvm_id12_grp grp;
 170         __u8                    resv2[2880];
 171 } __packed;
 172
 173 struct nvme_nvm_bb_tbl {
 174         __u8    tblid[4];
 175         __le16  verid;
 176         __le16  revid;
 177         __le32  rvsd1;
 178         __le32  tblks;
 179         __le32  tfact;
 180         __le32  tgrown;
 181         __le32  tdresv;
 182         __le32  thresv;
 183         __le32  rsvd2[8];
 184         __u8    blk[0];
 185 };
 186
 187 struct nvme_nvm_id20_addrf {
 188         __u8                    grp_len;
 189         __u8                    pu_len;
 190         __u8                    chk_len;
 191         __u8                    lba_len;
 192         __u8                    resv[4];
 193 };
 194
 195 struct nvme_nvm_id20 {
 196         __u8                    mjr;
 197         __u8                    mnr;
 198         __u8                    resv[6];
 199
 200         struct nvme_nvm_id20_addrf lbaf;
 201
 202         __le32                  mccap;
 203         __u8                    resv2[12];
 204
 205         __u8                    wit;
 206         __u8                    resv3[31];
 207
 208         /* Geometry */
 209         __le16                  num_grp;
 210         __le16                  num_pu;
 211         __le32                  num_chk;
 212         __le32                  clba;
 213         __u8                    resv4[52];
 214
 215         /* Write data requirements */
 216         __le32                  ws_min;
 217         __le32                  ws_opt;
 218         __le32                  mw_cunits;
 219         __le32                  maxoc;
 220         __le32                  maxocpu;
 221         __u8                    resv5[44];
 222
 223         /* Performance related metrics */
 224         __le32                  trdt;
 225         __le32                  trdm;
 226         __le32                  twrt;
 227         __le32                  twrm;
 228         __le32                  tcrst;
 229         __le32                  tcrsm;
 230         __u8                    resv6[40];
 231
 232         /* Reserved area */
 233         __u8                    resv7[2816];
 234
 235         /* Vendor specific */
 236         __u8                    vs[1024];
 237 };
 238
 239 /*
 240  * Check we didn't inadvertently grow the command struct
 241  */
 242 static inline void _nvme_nvm_check_size(void)
 243 {
 244         BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
 245         BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
 246         BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
 247         BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
 248         BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
 249         BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_grp) != 960);
 250         BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_addrf) != 16);
 251         BUILD_BUG_ON(sizeof(struct nvme_nvm_id12) != NVME_IDENTIFY_DATA_SIZE);
 252         BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 64);
 253         BUILD_BUG_ON(sizeof(struct nvme_nvm_id20_addrf) != 8);
 254         BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE);
 255 }
 256
 257 static int init_grp(struct nvm_id *nvm_id, struct nvme_nvm_id12 *id12)
 258 {
 259         struct nvme_nvm_id12_grp *src;
 260         int sec_per_pg, sec_per_pl, pg_per_blk;
 261
 262         if (id12->cgrps != 1)
 263                 return -EINVAL;
 264
 265         src = &id12->grp;
 266
 267         nvm_id->mtype = src->mtype;
 268         nvm_id->fmtype = src->fmtype;
 269
 270         nvm_id->num_ch = src->num_ch;
 271         nvm_id->num_lun = src->num_lun;
 272
 273         nvm_id->num_chk = le16_to_cpu(src->num_chk);
 274         nvm_id->csecs = le16_to_cpu(src->csecs);
 275         nvm_id->sos = le16_to_cpu(src->sos);
 276
 277         pg_per_blk = le16_to_cpu(src->num_pg);
 278         sec_per_pg = le16_to_cpu(src->fpg_sz) / nvm_id->csecs;
 279         sec_per_pl = sec_per_pg * src->num_pln;
 280         nvm_id->clba = sec_per_pl * pg_per_blk;
 281         nvm_id->ws_per_chk = pg_per_blk;
 282
 283         nvm_id->mpos = le32_to_cpu(src->mpos);
 284         nvm_id->cpar = le16_to_cpu(src->cpar);
 285         nvm_id->mccap = le32_to_cpu(src->mccap);
 286
 287         nvm_id->ws_opt = nvm_id->ws_min = sec_per_pg;
 288         nvm_id->ws_seq = NVM_IO_SNGL_ACCESS;
 289
 290         if (nvm_id->mpos & 0x020202) {
 291                 nvm_id->ws_seq = NVM_IO_DUAL_ACCESS;
 292                 nvm_id->ws_opt <<= 1;
 293         } else if (nvm_id->mpos & 0x040404) {
 294                 nvm_id->ws_seq = NVM_IO_QUAD_ACCESS;
 295                 nvm_id->ws_opt <<= 2;
 296         }
 297
 298         nvm_id->trdt = le32_to_cpu(src->trdt);
 299         nvm_id->trdm = le32_to_cpu(src->trdm);
 300         nvm_id->tprt = le32_to_cpu(src->tprt);
 301         nvm_id->tprm = le32_to_cpu(src->tprm);
 302         nvm_id->tbet = le32_to_cpu(src->tbet);
 303         nvm_id->tbem = le32_to_cpu(src->tbem);
 304
 305         /* 1.2 compatibility */
 306         nvm_id->num_pln = src->num_pln;
 307         nvm_id->num_pg = le16_to_cpu(src->num_pg);
 308         nvm_id->fpg_sz = le16_to_cpu(src->fpg_sz);
 309
 310         return 0;
 311 }
 312
 313 static int nvme_nvm_setup_12(struct nvm_dev *nvmdev, struct nvm_id *nvm_id,
 314                 struct nvme_nvm_id12 *id)
 315 {
 316         nvm_id->ver_id = id->ver_id;
 317         nvm_id->vmnt = id->vmnt;
 318         nvm_id->cap = le32_to_cpu(id->cap);
 319         nvm_id->dom = le32_to_cpu(id->dom);
 320         memcpy(&nvm_id->ppaf, &id->ppaf,
 321                                         sizeof(struct nvm_addr_format));
 322
 323         return init_grp(nvm_id, id);
 324 }
 325
 326 static int nvme_nvm_setup_20(struct nvm_dev *nvmdev, struct nvm_id *nvm_id,
 327                 struct nvme_nvm_id20 *id)
 328 {
 329         nvm_id->ver_id = id->mjr;
 330
 331         nvm_id->num_ch = le16_to_cpu(id->num_grp);
 332         nvm_id->num_lun = le16_to_cpu(id->num_pu);
 333         nvm_id->num_chk = le32_to_cpu(id->num_chk);
 334         nvm_id->clba = le32_to_cpu(id->clba);
 335
 336         nvm_id->ws_min = le32_to_cpu(id->ws_min);
 337         nvm_id->ws_opt = le32_to_cpu(id->ws_opt);
 338         nvm_id->mw_cunits = le32_to_cpu(id->mw_cunits);
 339
 340         nvm_id->trdt = le32_to_cpu(id->trdt);
 341         nvm_id->trdm = le32_to_cpu(id->trdm);
 342         nvm_id->tprt = le32_to_cpu(id->twrt);
 343         nvm_id->tprm = le32_to_cpu(id->twrm);
 344         nvm_id->tbet = le32_to_cpu(id->tcrst);
 345         nvm_id->tbem = le32_to_cpu(id->tcrsm);
 346
 347         /* calculated values */
 348         nvm_id->ws_per_chk = nvm_id->clba / nvm_id->ws_min;
 349
 350         /* 1.2 compatibility */
 351         nvm_id->ws_seq = NVM_IO_SNGL_ACCESS;
 352
 353         return 0;
 354 }
 355
 356 static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id)
 357 {
 358         struct nvme_ns *ns = nvmdev->q->queuedata;
 359         struct nvme_nvm_id12 *id;
 360         struct nvme_nvm_command c = {};
 361         int ret;
 362
 363         c.identity.opcode = nvme_nvm_admin_identity;
 364         c.identity.nsid = cpu_to_le32(ns->head->ns_id);
 365
 366         id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL);
 367         if (!id)
 368                 return -ENOMEM;
 369
 370         ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
 371                                 id, sizeof(struct nvme_nvm_id12));
 372         if (ret) {
 373                 ret = -EIO;
 374                 goto out;
 375         }
 376
 377         /*
 378          * The 1.2 and 2.0 specifications share the first byte in their geometry
 379          * command to make it possible to know what version a device implements.
 380          */
 381         switch (id->ver_id) {
 382         case 1:
 383                 ret = nvme_nvm_setup_12(nvmdev, nvm_id, id);
 384                 break;
 385         case 2:
 386                 ret = nvme_nvm_setup_20(nvmdev, nvm_id,
 387                                 (struct nvme_nvm_id20 *)id);
 388                 break;
 389         default:
 390                 dev_err(ns->ctrl->device,
 391                         "OCSSD revision not supported (%d)\n",
 392                         nvm_id->ver_id);
 393                 ret = -EINVAL;
 394         }
 395 out:
 396         kfree(id);
 397         return ret;
 398 }
 399
 400 static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 401                                                                 u8 *blks)
 402 {
 403         struct request_queue *q = nvmdev->q;
 404         struct nvm_geo *geo = &nvmdev->geo;
 405         struct nvme_ns *ns = q->queuedata;
 406         struct nvme_ctrl *ctrl = ns->ctrl;
 407         struct nvme_nvm_command c = {};
 408         struct nvme_nvm_bb_tbl *bb_tbl;
 409         int nr_blks = geo->nr_chks * geo->plane_mode;
 410         int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
 411         int ret = 0;
 412
 413         c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
 414         c.get_bb.nsid = cpu_to_le32(ns->head->ns_id);
 415         c.get_bb.spba = cpu_to_le64(ppa.ppa);
 416
 417         bb_tbl = kzalloc(tblsz, GFP_KERNEL);
 418         if (!bb_tbl)
 419                 return -ENOMEM;
 420
 421         ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
 422                                                                 bb_tbl, tblsz);
 423         if (ret) {
 424                 dev_err(ctrl->device, "get bad block table failed (%d)\n", ret);
 425                 ret = -EIO;
 426                 goto out;
 427         }
 428
 429         if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
 430                 bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
 431                 dev_err(ctrl->device, "bbt format mismatch\n");
 432                 ret = -EINVAL;
 433                 goto out;
 434         }
 435
 436         if (le16_to_cpu(bb_tbl->verid) != 1) {
 437                 ret = -EINVAL;
 438                 dev_err(ctrl->device, "bbt version not supported\n");
 439                 goto out;
 440         }
 441
 442         if (le32_to_cpu(bb_tbl->tblks) != nr_blks) {
 443                 ret = -EINVAL;
 444                 dev_err(ctrl->device,
 445                                 "bbt unsuspected blocks returned (%u!=%u)",
 446                                 le32_to_cpu(bb_tbl->tblks), nr_blks);
 447                 goto out;
 448         }
 449
 450         memcpy(blks, bb_tbl->blk, geo->nr_chks * geo->plane_mode);
 451 out:
 452         kfree(bb_tbl);
 453         return ret;
 454 }
 455
 456 static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
 457                                                         int nr_ppas, int type)
 458 {
 459         struct nvme_ns *ns = nvmdev->q->queuedata;
 460         struct nvme_nvm_command c = {};
 461         int ret = 0;
 462
 463         c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
 464         c.set_bb.nsid = cpu_to_le32(ns->head->ns_id);
 465         c.set_bb.spba = cpu_to_le64(ppas->ppa);
 466         c.set_bb.nlb = cpu_to_le16(nr_ppas - 1);
 467         c.set_bb.value = type;
 468
 469         ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
 470                                                                 NULL, 0);
 471         if (ret)
 472                 dev_err(ns->ctrl->device, "set bad block table failed (%d)\n",
 473                                                                         ret);
 474         return ret;
 475 }
 476
 477 static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
 478                                     struct nvme_nvm_command *c)
 479 {
 480         c->ph_rw.opcode = rqd->opcode;
 481         c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 482         c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
 483         c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
 484         c->ph_rw.control = cpu_to_le16(rqd->flags);
 485         c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
 486 }
 487
 488 static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
 489 {
 490         struct nvm_rq *rqd = rq->end_io_data;
 491
 492         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 493         rqd->error = nvme_req(rq)->status;
 494         nvm_end_io(rqd);
 495
 496         kfree(nvme_req(rq)->cmd);
 497         blk_mq_free_request(rq);
 498 }
 499
 500 static struct request *nvme_nvm_alloc_request(struct request_queue *q,
 501                                               struct nvm_rq *rqd,
 502                                               struct nvme_nvm_command *cmd)
 503 {
 504         struct nvme_ns *ns = q->queuedata;
 505         struct request *rq;
 506
 507         nvme_nvm_rqtocmd(rqd, ns, cmd);
 508
 509         rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
 510         if (IS_ERR(rq))
 511                 return rq;
 512
 513         rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
 514
 515         if (rqd->bio) {
 516                 blk_init_request_from_bio(rq, rqd->bio);
 517         } else {
 518                 rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
 519                 rq->__data_len = 0;
 520         }
 521
 522         return rq;
 523 }
 524
 525 static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 526 {
 527         struct request_queue *q = dev->q;
 528         struct nvme_nvm_command *cmd;
 529         struct request *rq;
 530
 531         cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
 532         if (!cmd)
 533                 return -ENOMEM;
 534
 535         rq = nvme_nvm_alloc_request(q, rqd, cmd);
 536         if (IS_ERR(rq)) {
 537                 kfree(cmd);
 538                 return PTR_ERR(rq);
 539         }
 540
 541         rq->end_io_data = rqd;
 542
 543         blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
 544
 545         return 0;
 546 }
 547
 548 static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
 549 {
 550         struct request_queue *q = dev->q;
 551         struct request *rq;
 552         struct nvme_nvm_command cmd;
 553         int ret = 0;
 554
 555         memset(&cmd, 0, sizeof(struct nvme_nvm_command));
 556
 557         rq = nvme_nvm_alloc_request(q, rqd, &cmd);
 558         if (IS_ERR(rq))
 559                 return PTR_ERR(rq);
 560
 561         /* I/Os can fail and the error is signaled through rqd. Callers must
 562          * handle the error accordingly.
 563          */
 564         blk_execute_rq(q, NULL, rq, 0);
 565         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 566                 ret = -EINTR;
 567
 568         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 569         rqd->error = nvme_req(rq)->status;
 570
 571         blk_mq_free_request(rq);
 572
 573         return ret;
 574 }
 575
 576 static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
 577 {
 578         struct nvme_ns *ns = nvmdev->q->queuedata;
 579
 580         return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0);
 581 }
 582
 583 static void nvme_nvm_destroy_dma_pool(void *pool)
 584 {
 585         struct dma_pool *dma_pool = pool;
 586
 587         dma_pool_destroy(dma_pool);
 588 }
 589
 590 static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
 591                                     gfp_t mem_flags, dma_addr_t *dma_handler)
 592 {
 593         return dma_pool_alloc(pool, mem_flags, dma_handler);
 594 }
 595
 596 static void nvme_nvm_dev_dma_free(void *pool, void *addr,
 597                                                         dma_addr_t dma_handler)
 598 {
 599         dma_pool_free(pool, addr, dma_handler);
 600 }
 601
 602 static struct nvm_dev_ops nvme_nvm_dev_ops = {
 603         .identity               = nvme_nvm_identity,
 604
 605         .get_bb_tbl             = nvme_nvm_get_bb_tbl,
 606         .set_bb_tbl             = nvme_nvm_set_bb_tbl,
 607
 608         .submit_io              = nvme_nvm_submit_io,
 609         .submit_io_sync         = nvme_nvm_submit_io_sync,
 610
 611         .create_dma_pool        = nvme_nvm_create_dma_pool,
 612         .destroy_dma_pool       = nvme_nvm_destroy_dma_pool,
 613         .dev_dma_alloc          = nvme_nvm_dev_dma_alloc,
 614         .dev_dma_free           = nvme_nvm_dev_dma_free,
 615 };
 616
 617 static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 618                                 struct nvme_ns *ns,
 619                                 struct nvme_nvm_command *vcmd,
 620                                 void __user *ubuf, unsigned int bufflen,
 621                                 void __user *meta_buf, unsigned int meta_len,
 622                                 void __user *ppa_buf, unsigned int ppa_len,
 623                                 u32 *result, u64 *status, unsigned int timeout)
 624 {
 625         bool write = nvme_is_write((struct nvme_command *)vcmd);
 626         struct nvm_dev *dev = ns->ndev;
 627         struct gendisk *disk = ns->disk;
 628         struct request *rq;
 629         struct bio *bio = NULL;
 630         __le64 *ppa_list = NULL;
 631         dma_addr_t ppa_dma;
 632         __le64 *metadata = NULL;
 633         dma_addr_t metadata_dma;
 634         DECLARE_COMPLETION_ONSTACK(wait);
 635         int ret = 0;
 636
 637         rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
 638                         NVME_QID_ANY);
 639         if (IS_ERR(rq)) {
 640                 ret = -ENOMEM;
 641                 goto err_cmd;
 642         }
 643
 644         rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
 645
 646         if (ppa_buf && ppa_len) {
 647                 ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
 648                 if (!ppa_list) {
 649                         ret = -ENOMEM;
 650                         goto err_rq;
 651                 }
 652                 if (copy_from_user(ppa_list, (void __user *)ppa_buf,
 653                                                 sizeof(u64) * (ppa_len + 1))) {
 654                         ret = -EFAULT;
 655                         goto err_ppa;
 656                 }
 657                 vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
 658         } else {
 659                 vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
 660         }
 661
 662         if (ubuf && bufflen) {
 663                 ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
 664                 if (ret)
 665                         goto err_ppa;
 666                 bio = rq->bio;
 667
 668                 if (meta_buf && meta_len) {
 669                         metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
 670                                                                 &metadata_dma);
 671                         if (!metadata) {
 672                                 ret = -ENOMEM;
 673                                 goto err_map;
 674                         }
 675
 676                         if (write) {
 677                                 if (copy_from_user(metadata,
 678                                                 (void __user *)meta_buf,
 679                                                 meta_len)) {
 680                                         ret = -EFAULT;
 681                                         goto err_meta;
 682                                 }
 683                         }
 684                         vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
 685                 }
 686
 687                 bio->bi_disk = disk;
 688         }
 689
 690         blk_execute_rq(q, NULL, rq, 0);
 691
 692         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 693                 ret = -EINTR;
 694         else if (nvme_req(rq)->status & 0x7ff)
 695                 ret = -EIO;
 696         if (result)
 697                 *result = nvme_req(rq)->status & 0x7ff;
 698         if (status)
 699                 *status = le64_to_cpu(nvme_req(rq)->result.u64);
 700
 701         if (metadata && !ret && !write) {
 702                 if (copy_to_user(meta_buf, (void *)metadata, meta_len))
 703                         ret = -EFAULT;
 704         }
 705 err_meta:
 706         if (meta_buf && meta_len)
 707                 dma_pool_free(dev->dma_pool, metadata, metadata_dma);
 708 err_map:
 709         if (bio)
 710                 blk_rq_unmap_user(bio);
 711 err_ppa:
 712         if (ppa_buf && ppa_len)
 713                 dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
 714 err_rq:
 715         blk_mq_free_request(rq);
 716 err_cmd:
 717         return ret;
 718 }
 719
 720 static int nvme_nvm_submit_vio(struct nvme_ns *ns,
 721                                         struct nvm_user_vio __user *uvio)
 722 {
 723         struct nvm_user_vio vio;
 724         struct nvme_nvm_command c;
 725         unsigned int length;
 726         int ret;
 727
 728         if (copy_from_user(&vio, uvio, sizeof(vio)))
 729                 return -EFAULT;
 730         if (vio.flags)
 731                 return -EINVAL;
 732
 733         memset(&c, 0, sizeof(c));
 734         c.ph_rw.opcode = vio.opcode;
 735         c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 736         c.ph_rw.control = cpu_to_le16(vio.control);
 737         c.ph_rw.length = cpu_to_le16(vio.nppas);
 738
 739         length = (vio.nppas + 1) << ns->lba_shift;
 740
 741         ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
 742                         (void __user *)(uintptr_t)vio.addr, length,
 743                         (void __user *)(uintptr_t)vio.metadata,
 744                                                         vio.metadata_len,
 745                         (void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
 746                         &vio.result, &vio.status, 0);
 747
 748         if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
 749                 return -EFAULT;
 750
 751         return ret;
 752 }
 753
 754 static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
 755                                         struct nvm_passthru_vio __user *uvcmd)
 756 {
 757         struct nvm_passthru_vio vcmd;
 758         struct nvme_nvm_command c;
 759         struct request_queue *q;
 760         unsigned int timeout = 0;
 761         int ret;
 762
 763         if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
 764                 return -EFAULT;
 765         if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
 766                 return -EACCES;
 767         if (vcmd.flags)
 768                 return -EINVAL;
 769
 770         memset(&c, 0, sizeof(c));
 771         c.common.opcode = vcmd.opcode;
 772         c.common.nsid = cpu_to_le32(ns->head->ns_id);
 773         c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
 774         c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
 775         /* cdw11-12 */
 776         c.ph_rw.length = cpu_to_le16(vcmd.nppas);
 777         c.ph_rw.control  = cpu_to_le16(vcmd.control);
 778         c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
 779         c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
 780         c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
 781
 782         if (vcmd.timeout_ms)
 783                 timeout = msecs_to_jiffies(vcmd.timeout_ms);
 784
 785         q = admin ? ns->ctrl->admin_q : ns->queue;
 786
 787         ret = nvme_nvm_submit_user_cmd(q, ns,
 788                         (struct nvme_nvm_command *)&c,
 789                         (void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
 790                         (void __user *)(uintptr_t)vcmd.metadata,
 791                                                         vcmd.metadata_len,
 792                         (void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
 793                         &vcmd.result, &vcmd.status, timeout);
 794
 795         if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
 796                 return -EFAULT;
 797
 798         return ret;
 799 }
 800
 801 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
 802 {
 803         switch (cmd) {
 804         case NVME_NVM_IOCTL_ADMIN_VIO:
 805                 return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg);
 806         case NVME_NVM_IOCTL_IO_VIO:
 807                 return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg);
 808         case NVME_NVM_IOCTL_SUBMIT_VIO:
 809                 return nvme_nvm_submit_vio(ns, (void __user *)arg);
 810         default:
 811                 return -ENOTTY;
 812         }
 813 }
 814
 815 void nvme_nvm_update_nvm_info(struct nvme_ns *ns)
 816 {
 817         struct nvm_dev *ndev = ns->ndev;
 818
 819         ndev->identity.csecs = ndev->geo.sec_size = 1 << ns->lba_shift;
 820         ndev->identity.sos = ndev->geo.oob_size = ns->ms;
 821 }
 822
 823 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
 824 {
 825         struct request_queue *q = ns->queue;
 826         struct nvm_dev *dev;
 827
 828         _nvme_nvm_check_size();
 829
 830         dev = nvm_alloc_dev(node);
 831         if (!dev)
 832                 return -ENOMEM;
 833
 834         dev->q = q;
 835         memcpy(dev->name, disk_name, DISK_NAME_LEN);
 836         dev->ops = &nvme_nvm_dev_ops;
 837         dev->private_data = ns;
 838         ns->ndev = dev;
 839
 840         return nvm_register(dev);
 841 }
 842
 843 void nvme_nvm_unregister(struct nvme_ns *ns)
 844 {
 845         nvm_unregister(ns->ndev);
 846 }
 847
 848 static ssize_t nvm_dev_attr_show(struct device *dev,
 849                 struct device_attribute *dattr, char *page)
 850 {
 851         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
 852         struct nvm_dev *ndev = ns->ndev;
 853         struct nvm_id *id;
 854         struct attribute *attr;
 855
 856         if (!ndev)
 857                 return 0;
 858
 859         id = &ndev->identity;
 860         attr = &dattr->attr;
 861
 862         if (strcmp(attr->name, "version") == 0) {
 863                 return scnprintf(page, PAGE_SIZE, "%u\n", id->ver_id);
 864         } else if (strcmp(attr->name, "capabilities") == 0) {
 865                 return scnprintf(page, PAGE_SIZE, "%u\n", id->cap);
 866         } else if (strcmp(attr->name, "read_typ") == 0) {
 867                 return scnprintf(page, PAGE_SIZE, "%u\n", id->trdt);
 868         } else if (strcmp(attr->name, "read_max") == 0) {
 869                 return scnprintf(page, PAGE_SIZE, "%u\n", id->trdm);
 870         } else {
 871                 return scnprintf(page,
 872                                  PAGE_SIZE,
 873                                  "Unhandled attr(%s) in `nvm_dev_attr_show`\n",
 874                                  attr->name);
 875         }
 876 }
 877
 878 static ssize_t nvm_dev_attr_show_12(struct device *dev,
 879                 struct device_attribute *dattr, char *page)
 880 {
 881         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
 882         struct nvm_dev *ndev = ns->ndev;
 883         struct nvm_id *id;
 884         struct attribute *attr;
 885
 886         if (!ndev)
 887                 return 0;
 888
 889         id = &ndev->identity;
 890         attr = &dattr->attr;
 891
 892         if (strcmp(attr->name, "vendor_opcode") == 0) {
 893                 return scnprintf(page, PAGE_SIZE, "%u\n", id->vmnt);
 894         } else if (strcmp(attr->name, "device_mode") == 0) {
 895                 return scnprintf(page, PAGE_SIZE, "%u\n", id->dom);
 896         /* kept for compatibility */
 897         } else if (strcmp(attr->name, "media_manager") == 0) {
 898                 return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
 899         } else if (strcmp(attr->name, "ppa_format") == 0) {
 900                 return scnprintf(page, PAGE_SIZE,
 901                         "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 902                         id->ppaf.ch_offset, id->ppaf.ch_len,
 903                         id->ppaf.lun_offset, id->ppaf.lun_len,
 904                         id->ppaf.pln_offset, id->ppaf.pln_len,
 905                         id->ppaf.blk_offset, id->ppaf.blk_len,
 906                         id->ppaf.pg_offset, id->ppaf.pg_len,
 907                         id->ppaf.sect_offset, id->ppaf.sect_len);
 908         } else if (strcmp(attr->name, "media_type") == 0) {     /* u8 */
 909                 return scnprintf(page, PAGE_SIZE, "%u\n", id->mtype);
 910         } else if (strcmp(attr->name, "flash_media_type") == 0) {
 911                 return scnprintf(page, PAGE_SIZE, "%u\n", id->fmtype);
 912         } else if (strcmp(attr->name, "num_channels") == 0) {
 913                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_ch);
 914         } else if (strcmp(attr->name, "num_luns") == 0) {
 915                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_lun);
 916         } else if (strcmp(attr->name, "num_planes") == 0) {
 917                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_pln);
 918         } else if (strcmp(attr->name, "num_blocks") == 0) {     /* u16 */
 919                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_chk);
 920         } else if (strcmp(attr->name, "num_pages") == 0) {
 921                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_pg);
 922         } else if (strcmp(attr->name, "page_size") == 0) {
 923                 return scnprintf(page, PAGE_SIZE, "%u\n", id->fpg_sz);
 924         } else if (strcmp(attr->name, "hw_sector_size") == 0) {
 925                 return scnprintf(page, PAGE_SIZE, "%u\n", id->csecs);
 926         } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
 927                 return scnprintf(page, PAGE_SIZE, "%u\n", id->sos);
 928         } else if (strcmp(attr->name, "prog_typ") == 0) {
 929                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tprt);
 930         } else if (strcmp(attr->name, "prog_max") == 0) {
 931                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tprm);
 932         } else if (strcmp(attr->name, "erase_typ") == 0) {
 933                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tbet);
 934         } else if (strcmp(attr->name, "erase_max") == 0) {
 935                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tbem);
 936         } else if (strcmp(attr->name, "multiplane_modes") == 0) {
 937                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", id->mpos);
 938         } else if (strcmp(attr->name, "media_capabilities") == 0) {
 939                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", id->mccap);
 940         } else if (strcmp(attr->name, "max_phys_secs") == 0) {
 941                 return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
 942         } else {
 943                 return scnprintf(page,
 944                                  PAGE_SIZE,
 945                                  "Unhandled attr(%s) in `nvm_dev_attr_show_12`\n",
 946                                  attr->name);
 947         }
 948 }
 949
 950 static ssize_t nvm_dev_attr_show_20(struct device *dev,
 951                 struct device_attribute *dattr, char *page)
 952 {
 953         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
 954         struct nvm_dev *ndev = ns->ndev;
 955         struct nvm_id *id;
 956         struct attribute *attr;
 957
 958         if (!ndev)
 959                 return 0;
 960
 961         id = &ndev->identity;
 962         attr = &dattr->attr;
 963
 964         if (strcmp(attr->name, "groups") == 0) {
 965                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_ch);
 966         } else if (strcmp(attr->name, "punits") == 0) {
 967                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_lun);
 968         } else if (strcmp(attr->name, "chunks") == 0) {
 969                 return scnprintf(page, PAGE_SIZE, "%u\n", id->num_chk);
 970         } else if (strcmp(attr->name, "clba") == 0) {
 971                 return scnprintf(page, PAGE_SIZE, "%u\n", id->clba);
 972         } else if (strcmp(attr->name, "ws_min") == 0) {
 973                 return scnprintf(page, PAGE_SIZE, "%u\n", id->ws_min);
 974         } else if (strcmp(attr->name, "ws_opt") == 0) {
 975                 return scnprintf(page, PAGE_SIZE, "%u\n", id->ws_opt);
 976         } else if (strcmp(attr->name, "mw_cunits") == 0) {
 977                 return scnprintf(page, PAGE_SIZE, "%u\n", id->mw_cunits);
 978         } else if (strcmp(attr->name, "write_typ") == 0) {
 979                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tprt);
 980         } else if (strcmp(attr->name, "write_max") == 0) {
 981                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tprm);
 982         } else if (strcmp(attr->name, "reset_typ") == 0) {
 983                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tbet);
 984         } else if (strcmp(attr->name, "reset_max") == 0) {
 985                 return scnprintf(page, PAGE_SIZE, "%u\n", id->tbem);
 986         } else {
 987                 return scnprintf(page,
 988                                  PAGE_SIZE,
 989                                  "Unhandled attr(%s) in `nvm_dev_attr_show_20`\n",
 990                                  attr->name);
 991         }
 992 }
 993
 994 #define NVM_DEV_ATTR_RO(_name)                                  \
 995         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
 996 #define NVM_DEV_ATTR_12_RO(_name)                                       \
 997         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL)
 998 #define NVM_DEV_ATTR_20_RO(_name)                                       \
 999         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL)
1000
1001 /* general attributes */
1002 static NVM_DEV_ATTR_RO(version);
1003 static NVM_DEV_ATTR_RO(capabilities);
1004
1005 static NVM_DEV_ATTR_RO(read_typ);
1006 static NVM_DEV_ATTR_RO(read_max);
1007
1008 /* 1.2 values */
1009 static NVM_DEV_ATTR_12_RO(vendor_opcode);
1010 static NVM_DEV_ATTR_12_RO(device_mode);
1011 static NVM_DEV_ATTR_12_RO(ppa_format);
1012 static NVM_DEV_ATTR_12_RO(media_manager);
1013 static NVM_DEV_ATTR_12_RO(media_type);
1014 static NVM_DEV_ATTR_12_RO(flash_media_type);
1015 static NVM_DEV_ATTR_12_RO(num_channels);
1016 static NVM_DEV_ATTR_12_RO(num_luns);
1017 static NVM_DEV_ATTR_12_RO(num_planes);
1018 static NVM_DEV_ATTR_12_RO(num_blocks);
1019 static NVM_DEV_ATTR_12_RO(num_pages);
1020 static NVM_DEV_ATTR_12_RO(page_size);
1021 static NVM_DEV_ATTR_12_RO(hw_sector_size);
1022 static NVM_DEV_ATTR_12_RO(oob_sector_size);
1023 static NVM_DEV_ATTR_12_RO(prog_typ);
1024 static NVM_DEV_ATTR_12_RO(prog_max);
1025 static NVM_DEV_ATTR_12_RO(erase_typ);
1026 static NVM_DEV_ATTR_12_RO(erase_max);
1027 static NVM_DEV_ATTR_12_RO(multiplane_modes);
1028 static NVM_DEV_ATTR_12_RO(media_capabilities);
1029 static NVM_DEV_ATTR_12_RO(max_phys_secs);
1030
1031 static struct attribute *nvm_dev_attrs_12[] = {
1032         &dev_attr_version.attr,
1033         &dev_attr_capabilities.attr,
1034
1035         &dev_attr_vendor_opcode.attr,
1036         &dev_attr_device_mode.attr,
1037         &dev_attr_media_manager.attr,
1038         &dev_attr_ppa_format.attr,
1039         &dev_attr_media_type.attr,
1040         &dev_attr_flash_media_type.attr,
1041         &dev_attr_num_channels.attr,
1042         &dev_attr_num_luns.attr,
1043         &dev_attr_num_planes.attr,
1044         &dev_attr_num_blocks.attr,
1045         &dev_attr_num_pages.attr,
1046         &dev_attr_page_size.attr,
1047         &dev_attr_hw_sector_size.attr,
1048         &dev_attr_oob_sector_size.attr,
1049         &dev_attr_read_typ.attr,
1050         &dev_attr_read_max.attr,
1051         &dev_attr_prog_typ.attr,
1052         &dev_attr_prog_max.attr,
1053         &dev_attr_erase_typ.attr,
1054         &dev_attr_erase_max.attr,
1055         &dev_attr_multiplane_modes.attr,
1056         &dev_attr_media_capabilities.attr,
1057         &dev_attr_max_phys_secs.attr,
1058
1059         NULL,
1060 };
1061
1062 static const struct attribute_group nvm_dev_attr_group_12 = {
1063         .name           = "lightnvm",
1064         .attrs          = nvm_dev_attrs_12,
1065 };
1066
1067 /* 2.0 values */
1068 static NVM_DEV_ATTR_20_RO(groups);
1069 static NVM_DEV_ATTR_20_RO(punits);
1070 static NVM_DEV_ATTR_20_RO(chunks);
1071 static NVM_DEV_ATTR_20_RO(clba);
1072 static NVM_DEV_ATTR_20_RO(ws_min);
1073 static NVM_DEV_ATTR_20_RO(ws_opt);
1074 static NVM_DEV_ATTR_20_RO(mw_cunits);
1075 static NVM_DEV_ATTR_20_RO(write_typ);
1076 static NVM_DEV_ATTR_20_RO(write_max);
1077 static NVM_DEV_ATTR_20_RO(reset_typ);
1078 static NVM_DEV_ATTR_20_RO(reset_max);
1079
1080 static struct attribute *nvm_dev_attrs_20[] = {
1081         &dev_attr_version.attr,
1082         &dev_attr_capabilities.attr,
1083
1084         &dev_attr_groups.attr,
1085         &dev_attr_punits.attr,
1086         &dev_attr_chunks.attr,
1087         &dev_attr_clba.attr,
1088         &dev_attr_ws_min.attr,
1089         &dev_attr_ws_opt.attr,
1090         &dev_attr_mw_cunits.attr,
1091
1092         &dev_attr_read_typ.attr,
1093         &dev_attr_read_max.attr,
1094         &dev_attr_write_typ.attr,
1095         &dev_attr_write_max.attr,
1096         &dev_attr_reset_typ.attr,
1097         &dev_attr_reset_max.attr,
1098
1099         NULL,
1100 };
1101
1102 static const struct attribute_group nvm_dev_attr_group_20 = {
1103         .name           = "lightnvm",
1104         .attrs          = nvm_dev_attrs_20,
1105 };
1106
1107 int nvme_nvm_register_sysfs(struct nvme_ns *ns)
1108 {
1109         if (!ns->ndev)
1110                 return -EINVAL;
1111
1112         switch (ns->ndev->identity.ver_id) {
1113         case 1:
1114                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1115                                         &nvm_dev_attr_group_12);
1116         case 2:
1117                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1118                                         &nvm_dev_attr_group_20);
1119         }
1120
1121         return -EINVAL;
1122 }
1123
1124 void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
1125 {
1126         switch (ns->ndev->identity.ver_id) {
1127         case 1:
1128                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1129                                         &nvm_dev_attr_group_12);
1130                 break;
1131         case 2:
1132                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1133                                         &nvm_dev_attr_group_20);
1134                 break;
1135         }
1136 }