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 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                                  struct nvm_chk_meta *meta,
 571                                  sector_t slba, int nchks)
 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 = (struct nvme_nvm_chk_meta *)meta;
 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         /* Normalize lba address space to obtain log offset */
 589         ppa.ppa = slba;
 590         ppa = dev_to_generic_addr(ndev, ppa);
 591
 592         log_pos = ppa.m.chk;
 593         log_pos += ppa.m.pu * geo->num_chk;
 594         log_pos += ppa.m.grp * geo->num_lun * geo->num_chk;
 595
 596         offset = log_pos * sizeof(struct nvme_nvm_chk_meta);
 597
 598         while (left) {
 599                 len = min_t(unsigned int, left, max_len);
 600
 601                 ret = nvme_get_log(ctrl, ns->head->ns_id,
 602                                 NVME_NVM_LOG_REPORT_CHUNK, 0, dev_meta, len,
 603                                 offset);
 604                 if (ret) {
 605                         dev_err(ctrl->device, "Get REPORT CHUNK log error\n");
 606                         break;
 607                 }
 608
 609                 for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) {
 610                         meta->state = dev_meta->state;
 611                         meta->type = dev_meta->type;
 612                         meta->wi = dev_meta->wi;
 613                         meta->slba = le64_to_cpu(dev_meta->slba);
 614                         meta->cnlb = le64_to_cpu(dev_meta->cnlb);
 615                         meta->wp = le64_to_cpu(dev_meta->wp);
 616
 617                         meta++;
 618                         dev_meta++;
 619                 }
 620
 621                 offset += len;
 622                 left -= len;
 623         }
 624
 625         return ret;
 626 }
 627
 628 static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
 629                                     struct nvme_nvm_command *c)
 630 {
 631         c->ph_rw.opcode = rqd->opcode;
 632         c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 633         c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
 634         c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
 635         c->ph_rw.control = cpu_to_le16(rqd->flags);
 636         c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
 637 }
 638
 639 static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
 640 {
 641         struct nvm_rq *rqd = rq->end_io_data;
 642
 643         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 644         rqd->error = nvme_req(rq)->status;
 645         nvm_end_io(rqd);
 646
 647         kfree(nvme_req(rq)->cmd);
 648         blk_mq_free_request(rq);
 649 }
 650
 651 static struct request *nvme_nvm_alloc_request(struct request_queue *q,
 652                                               struct nvm_rq *rqd,
 653                                               struct nvme_nvm_command *cmd)
 654 {
 655         struct nvme_ns *ns = q->queuedata;
 656         struct request *rq;
 657
 658         nvme_nvm_rqtocmd(rqd, ns, cmd);
 659
 660         rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
 661         if (IS_ERR(rq))
 662                 return rq;
 663
 664         rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
 665
 666         if (rqd->bio)
 667                 blk_init_request_from_bio(rq, rqd->bio);
 668         else
 669                 rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
 670
 671         return rq;
 672 }
 673
 674 static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 675 {
 676         struct request_queue *q = dev->q;
 677         struct nvme_nvm_command *cmd;
 678         struct request *rq;
 679
 680         cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
 681         if (!cmd)
 682                 return -ENOMEM;
 683
 684         rq = nvme_nvm_alloc_request(q, rqd, cmd);
 685         if (IS_ERR(rq)) {
 686                 kfree(cmd);
 687                 return PTR_ERR(rq);
 688         }
 689
 690         rq->end_io_data = rqd;
 691
 692         blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
 693
 694         return 0;
 695 }
 696
 697 static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
 698 {
 699         struct request_queue *q = dev->q;
 700         struct request *rq;
 701         struct nvme_nvm_command cmd;
 702         int ret = 0;
 703
 704         memset(&cmd, 0, sizeof(struct nvme_nvm_command));
 705
 706         rq = nvme_nvm_alloc_request(q, rqd, &cmd);
 707         if (IS_ERR(rq))
 708                 return PTR_ERR(rq);
 709
 710         /* I/Os can fail and the error is signaled through rqd. Callers must
 711          * handle the error accordingly.
 712          */
 713         blk_execute_rq(q, NULL, rq, 0);
 714         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 715                 ret = -EINTR;
 716
 717         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 718         rqd->error = nvme_req(rq)->status;
 719
 720         blk_mq_free_request(rq);
 721
 722         return ret;
 723 }
 724
 725 static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
 726 {
 727         struct nvme_ns *ns = nvmdev->q->queuedata;
 728
 729         return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0);
 730 }
 731
 732 static void nvme_nvm_destroy_dma_pool(void *pool)
 733 {
 734         struct dma_pool *dma_pool = pool;
 735
 736         dma_pool_destroy(dma_pool);
 737 }
 738
 739 static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
 740                                     gfp_t mem_flags, dma_addr_t *dma_handler)
 741 {
 742         return dma_pool_alloc(pool, mem_flags, dma_handler);
 743 }
 744
 745 static void nvme_nvm_dev_dma_free(void *pool, void *addr,
 746                                                         dma_addr_t dma_handler)
 747 {
 748         dma_pool_free(pool, addr, dma_handler);
 749 }
 750
 751 static struct nvm_dev_ops nvme_nvm_dev_ops = {
 752         .identity               = nvme_nvm_identity,
 753
 754         .get_bb_tbl             = nvme_nvm_get_bb_tbl,
 755         .set_bb_tbl             = nvme_nvm_set_bb_tbl,
 756
 757         .get_chk_meta           = nvme_nvm_get_chk_meta,
 758
 759         .submit_io              = nvme_nvm_submit_io,
 760         .submit_io_sync         = nvme_nvm_submit_io_sync,
 761
 762         .create_dma_pool        = nvme_nvm_create_dma_pool,
 763         .destroy_dma_pool       = nvme_nvm_destroy_dma_pool,
 764         .dev_dma_alloc          = nvme_nvm_dev_dma_alloc,
 765         .dev_dma_free           = nvme_nvm_dev_dma_free,
 766 };
 767
 768 static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 769                                 struct nvme_ns *ns,
 770                                 struct nvme_nvm_command *vcmd,
 771                                 void __user *ubuf, unsigned int bufflen,
 772                                 void __user *meta_buf, unsigned int meta_len,
 773                                 void __user *ppa_buf, unsigned int ppa_len,
 774                                 u32 *result, u64 *status, unsigned int timeout)
 775 {
 776         bool write = nvme_is_write((struct nvme_command *)vcmd);
 777         struct nvm_dev *dev = ns->ndev;
 778         struct gendisk *disk = ns->disk;
 779         struct request *rq;
 780         struct bio *bio = NULL;
 781         __le64 *ppa_list = NULL;
 782         dma_addr_t ppa_dma;
 783         __le64 *metadata = NULL;
 784         dma_addr_t metadata_dma;
 785         DECLARE_COMPLETION_ONSTACK(wait);
 786         int ret = 0;
 787
 788         rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
 789                         NVME_QID_ANY);
 790         if (IS_ERR(rq)) {
 791                 ret = -ENOMEM;
 792                 goto err_cmd;
 793         }
 794
 795         rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
 796
 797         if (ppa_buf && ppa_len) {
 798                 ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
 799                 if (!ppa_list) {
 800                         ret = -ENOMEM;
 801                         goto err_rq;
 802                 }
 803                 if (copy_from_user(ppa_list, (void __user *)ppa_buf,
 804                                                 sizeof(u64) * (ppa_len + 1))) {
 805                         ret = -EFAULT;
 806                         goto err_ppa;
 807                 }
 808                 vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
 809         } else {
 810                 vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
 811         }
 812
 813         if (ubuf && bufflen) {
 814                 ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
 815                 if (ret)
 816                         goto err_ppa;
 817                 bio = rq->bio;
 818
 819                 if (meta_buf && meta_len) {
 820                         metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
 821                                                                 &metadata_dma);
 822                         if (!metadata) {
 823                                 ret = -ENOMEM;
 824                                 goto err_map;
 825                         }
 826
 827                         if (write) {
 828                                 if (copy_from_user(metadata,
 829                                                 (void __user *)meta_buf,
 830                                                 meta_len)) {
 831                                         ret = -EFAULT;
 832                                         goto err_meta;
 833                                 }
 834                         }
 835                         vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
 836                 }
 837
 838                 bio->bi_disk = disk;
 839         }
 840
 841         blk_execute_rq(q, NULL, rq, 0);
 842
 843         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 844                 ret = -EINTR;
 845         else if (nvme_req(rq)->status & 0x7ff)
 846                 ret = -EIO;
 847         if (result)
 848                 *result = nvme_req(rq)->status & 0x7ff;
 849         if (status)
 850                 *status = le64_to_cpu(nvme_req(rq)->result.u64);
 851
 852         if (metadata && !ret && !write) {
 853                 if (copy_to_user(meta_buf, (void *)metadata, meta_len))
 854                         ret = -EFAULT;
 855         }
 856 err_meta:
 857         if (meta_buf && meta_len)
 858                 dma_pool_free(dev->dma_pool, metadata, metadata_dma);
 859 err_map:
 860         if (bio)
 861                 blk_rq_unmap_user(bio);
 862 err_ppa:
 863         if (ppa_buf && ppa_len)
 864                 dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
 865 err_rq:
 866         blk_mq_free_request(rq);
 867 err_cmd:
 868         return ret;
 869 }
 870
 871 static int nvme_nvm_submit_vio(struct nvme_ns *ns,
 872                                         struct nvm_user_vio __user *uvio)
 873 {
 874         struct nvm_user_vio vio;
 875         struct nvme_nvm_command c;
 876         unsigned int length;
 877         int ret;
 878
 879         if (copy_from_user(&vio, uvio, sizeof(vio)))
 880                 return -EFAULT;
 881         if (vio.flags)
 882                 return -EINVAL;
 883
 884         memset(&c, 0, sizeof(c));
 885         c.ph_rw.opcode = vio.opcode;
 886         c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 887         c.ph_rw.control = cpu_to_le16(vio.control);
 888         c.ph_rw.length = cpu_to_le16(vio.nppas);
 889
 890         length = (vio.nppas + 1) << ns->lba_shift;
 891
 892         ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
 893                         (void __user *)(uintptr_t)vio.addr, length,
 894                         (void __user *)(uintptr_t)vio.metadata,
 895                                                         vio.metadata_len,
 896                         (void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
 897                         &vio.result, &vio.status, 0);
 898
 899         if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
 900                 return -EFAULT;
 901
 902         return ret;
 903 }
 904
 905 static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
 906                                         struct nvm_passthru_vio __user *uvcmd)
 907 {
 908         struct nvm_passthru_vio vcmd;
 909         struct nvme_nvm_command c;
 910         struct request_queue *q;
 911         unsigned int timeout = 0;
 912         int ret;
 913
 914         if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
 915                 return -EFAULT;
 916         if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
 917                 return -EACCES;
 918         if (vcmd.flags)
 919                 return -EINVAL;
 920
 921         memset(&c, 0, sizeof(c));
 922         c.common.opcode = vcmd.opcode;
 923         c.common.nsid = cpu_to_le32(ns->head->ns_id);
 924         c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
 925         c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
 926         /* cdw11-12 */
 927         c.ph_rw.length = cpu_to_le16(vcmd.nppas);
 928         c.ph_rw.control  = cpu_to_le16(vcmd.control);
 929         c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
 930         c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
 931         c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
 932
 933         if (vcmd.timeout_ms)
 934                 timeout = msecs_to_jiffies(vcmd.timeout_ms);
 935
 936         q = admin ? ns->ctrl->admin_q : ns->queue;
 937
 938         ret = nvme_nvm_submit_user_cmd(q, ns,
 939                         (struct nvme_nvm_command *)&c,
 940                         (void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
 941                         (void __user *)(uintptr_t)vcmd.metadata,
 942                                                         vcmd.metadata_len,
 943                         (void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
 944                         &vcmd.result, &vcmd.status, timeout);
 945
 946         if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
 947                 return -EFAULT;
 948
 949         return ret;
 950 }
 951
 952 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
 953 {
 954         switch (cmd) {
 955         case NVME_NVM_IOCTL_ADMIN_VIO:
 956                 return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg);
 957         case NVME_NVM_IOCTL_IO_VIO:
 958                 return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg);
 959         case NVME_NVM_IOCTL_SUBMIT_VIO:
 960                 return nvme_nvm_submit_vio(ns, (void __user *)arg);
 961         default:
 962                 return -ENOTTY;
 963         }
 964 }
 965
 966 void nvme_nvm_update_nvm_info(struct nvme_ns *ns)
 967 {
 968         struct nvm_dev *ndev = ns->ndev;
 969         struct nvm_geo *geo = &ndev->geo;
 970
 971         if (geo->version == NVM_OCSSD_SPEC_12)
 972                 return;
 973
 974         geo->csecs = 1 << ns->lba_shift;
 975         geo->sos = ns->ms;
 976 }
 977
 978 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
 979 {
 980         struct request_queue *q = ns->queue;
 981         struct nvm_dev *dev;
 982
 983         _nvme_nvm_check_size();
 984
 985         dev = nvm_alloc_dev(node);
 986         if (!dev)
 987                 return -ENOMEM;
 988
 989         dev->q = q;
 990         memcpy(dev->name, disk_name, DISK_NAME_LEN);
 991         dev->ops = &nvme_nvm_dev_ops;
 992         dev->private_data = ns;
 993         ns->ndev = dev;
 994
 995         return nvm_register(dev);
 996 }
 997
 998 void nvme_nvm_unregister(struct nvme_ns *ns)
 999 {
1000         nvm_unregister(ns->ndev);
1001 }
1002
1003 static ssize_t nvm_dev_attr_show(struct device *dev,
1004                 struct device_attribute *dattr, char *page)
1005 {
1006         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1007         struct nvm_dev *ndev = ns->ndev;
1008         struct nvm_geo *geo = &ndev->geo;
1009         struct attribute *attr;
1010
1011         if (!ndev)
1012                 return 0;
1013
1014         attr = &dattr->attr;
1015
1016         if (strcmp(attr->name, "version") == 0) {
1017                 if (geo->major_ver_id == 1)
1018                         return scnprintf(page, PAGE_SIZE, "%u\n",
1019                                                 geo->major_ver_id);
1020                 else
1021                         return scnprintf(page, PAGE_SIZE, "%u.%u\n",
1022                                                 geo->major_ver_id,
1023                                                 geo->minor_ver_id);
1024         } else if (strcmp(attr->name, "capabilities") == 0) {
1025                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->cap);
1026         } else if (strcmp(attr->name, "read_typ") == 0) {
1027                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdt);
1028         } else if (strcmp(attr->name, "read_max") == 0) {
1029                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdm);
1030         } else {
1031                 return scnprintf(page,
1032                                  PAGE_SIZE,
1033                                  "Unhandled attr(%s) in `%s`\n",
1034                                  attr->name, __func__);
1035         }
1036 }
1037
1038 static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addrf_12 *ppaf, char *page)
1039 {
1040         return scnprintf(page, PAGE_SIZE,
1041                 "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1042                                 ppaf->ch_offset, ppaf->ch_len,
1043                                 ppaf->lun_offset, ppaf->lun_len,
1044                                 ppaf->pln_offset, ppaf->pln_len,
1045                                 ppaf->blk_offset, ppaf->blk_len,
1046                                 ppaf->pg_offset, ppaf->pg_len,
1047                                 ppaf->sec_offset, ppaf->sec_len);
1048 }
1049
1050 static ssize_t nvm_dev_attr_show_12(struct device *dev,
1051                 struct device_attribute *dattr, char *page)
1052 {
1053         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1054         struct nvm_dev *ndev = ns->ndev;
1055         struct nvm_geo *geo = &ndev->geo;
1056         struct attribute *attr;
1057
1058         if (!ndev)
1059                 return 0;
1060
1061         attr = &dattr->attr;
1062
1063         if (strcmp(attr->name, "vendor_opcode") == 0) {
1064                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->vmnt);
1065         } else if (strcmp(attr->name, "device_mode") == 0) {
1066                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->dom);
1067         /* kept for compatibility */
1068         } else if (strcmp(attr->name, "media_manager") == 0) {
1069                 return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
1070         } else if (strcmp(attr->name, "ppa_format") == 0) {
1071                 return nvm_dev_attr_show_ppaf((void *)&geo->addrf, page);
1072         } else if (strcmp(attr->name, "media_type") == 0) {     /* u8 */
1073                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mtype);
1074         } else if (strcmp(attr->name, "flash_media_type") == 0) {
1075                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fmtype);
1076         } else if (strcmp(attr->name, "num_channels") == 0) {
1077                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1078         } else if (strcmp(attr->name, "num_luns") == 0) {
1079                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1080         } else if (strcmp(attr->name, "num_planes") == 0) {
1081                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pln);
1082         } else if (strcmp(attr->name, "num_blocks") == 0) {     /* u16 */
1083                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1084         } else if (strcmp(attr->name, "num_pages") == 0) {
1085                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pg);
1086         } else if (strcmp(attr->name, "page_size") == 0) {
1087                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fpg_sz);
1088         } else if (strcmp(attr->name, "hw_sector_size") == 0) {
1089                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->csecs);
1090         } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
1091                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->sos);
1092         } else if (strcmp(attr->name, "prog_typ") == 0) {
1093                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1094         } else if (strcmp(attr->name, "prog_max") == 0) {
1095                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1096         } else if (strcmp(attr->name, "erase_typ") == 0) {
1097                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1098         } else if (strcmp(attr->name, "erase_max") == 0) {
1099                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1100         } else if (strcmp(attr->name, "multiplane_modes") == 0) {
1101                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mpos);
1102         } else if (strcmp(attr->name, "media_capabilities") == 0) {
1103                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mccap);
1104         } else if (strcmp(attr->name, "max_phys_secs") == 0) {
1105                 return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
1106         } else {
1107                 return scnprintf(page, PAGE_SIZE,
1108                         "Unhandled attr(%s) in `%s`\n",
1109                         attr->name, __func__);
1110         }
1111 }
1112
1113 static ssize_t nvm_dev_attr_show_20(struct device *dev,
1114                 struct device_attribute *dattr, char *page)
1115 {
1116         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1117         struct nvm_dev *ndev = ns->ndev;
1118         struct nvm_geo *geo = &ndev->geo;
1119         struct attribute *attr;
1120
1121         if (!ndev)
1122                 return 0;
1123
1124         attr = &dattr->attr;
1125
1126         if (strcmp(attr->name, "groups") == 0) {
1127                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1128         } else if (strcmp(attr->name, "punits") == 0) {
1129                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1130         } else if (strcmp(attr->name, "chunks") == 0) {
1131                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1132         } else if (strcmp(attr->name, "clba") == 0) {
1133                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->clba);
1134         } else if (strcmp(attr->name, "ws_min") == 0) {
1135                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_min);
1136         } else if (strcmp(attr->name, "ws_opt") == 0) {
1137                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_opt);
1138         } else if (strcmp(attr->name, "maxoc") == 0) {
1139                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxoc);
1140         } else if (strcmp(attr->name, "maxocpu") == 0) {
1141                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxocpu);
1142         } else if (strcmp(attr->name, "mw_cunits") == 0) {
1143                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mw_cunits);
1144         } else if (strcmp(attr->name, "write_typ") == 0) {
1145                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1146         } else if (strcmp(attr->name, "write_max") == 0) {
1147                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1148         } else if (strcmp(attr->name, "reset_typ") == 0) {
1149                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1150         } else if (strcmp(attr->name, "reset_max") == 0) {
1151                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1152         } else {
1153                 return scnprintf(page, PAGE_SIZE,
1154                         "Unhandled attr(%s) in `%s`\n",
1155                         attr->name, __func__);
1156         }
1157 }
1158
1159 #define NVM_DEV_ATTR_RO(_name)                                  \
1160         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
1161 #define NVM_DEV_ATTR_12_RO(_name)                                       \
1162         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL)
1163 #define NVM_DEV_ATTR_20_RO(_name)                                       \
1164         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL)
1165
1166 /* general attributes */
1167 static NVM_DEV_ATTR_RO(version);
1168 static NVM_DEV_ATTR_RO(capabilities);
1169
1170 static NVM_DEV_ATTR_RO(read_typ);
1171 static NVM_DEV_ATTR_RO(read_max);
1172
1173 /* 1.2 values */
1174 static NVM_DEV_ATTR_12_RO(vendor_opcode);
1175 static NVM_DEV_ATTR_12_RO(device_mode);
1176 static NVM_DEV_ATTR_12_RO(ppa_format);
1177 static NVM_DEV_ATTR_12_RO(media_manager);
1178 static NVM_DEV_ATTR_12_RO(media_type);
1179 static NVM_DEV_ATTR_12_RO(flash_media_type);
1180 static NVM_DEV_ATTR_12_RO(num_channels);
1181 static NVM_DEV_ATTR_12_RO(num_luns);
1182 static NVM_DEV_ATTR_12_RO(num_planes);
1183 static NVM_DEV_ATTR_12_RO(num_blocks);
1184 static NVM_DEV_ATTR_12_RO(num_pages);
1185 static NVM_DEV_ATTR_12_RO(page_size);
1186 static NVM_DEV_ATTR_12_RO(hw_sector_size);
1187 static NVM_DEV_ATTR_12_RO(oob_sector_size);
1188 static NVM_DEV_ATTR_12_RO(prog_typ);
1189 static NVM_DEV_ATTR_12_RO(prog_max);
1190 static NVM_DEV_ATTR_12_RO(erase_typ);
1191 static NVM_DEV_ATTR_12_RO(erase_max);
1192 static NVM_DEV_ATTR_12_RO(multiplane_modes);
1193 static NVM_DEV_ATTR_12_RO(media_capabilities);
1194 static NVM_DEV_ATTR_12_RO(max_phys_secs);
1195
1196 static struct attribute *nvm_dev_attrs_12[] = {
1197         &dev_attr_version.attr,
1198         &dev_attr_capabilities.attr,
1199
1200         &dev_attr_vendor_opcode.attr,
1201         &dev_attr_device_mode.attr,
1202         &dev_attr_media_manager.attr,
1203         &dev_attr_ppa_format.attr,
1204         &dev_attr_media_type.attr,
1205         &dev_attr_flash_media_type.attr,
1206         &dev_attr_num_channels.attr,
1207         &dev_attr_num_luns.attr,
1208         &dev_attr_num_planes.attr,
1209         &dev_attr_num_blocks.attr,
1210         &dev_attr_num_pages.attr,
1211         &dev_attr_page_size.attr,
1212         &dev_attr_hw_sector_size.attr,
1213         &dev_attr_oob_sector_size.attr,
1214         &dev_attr_read_typ.attr,
1215         &dev_attr_read_max.attr,
1216         &dev_attr_prog_typ.attr,
1217         &dev_attr_prog_max.attr,
1218         &dev_attr_erase_typ.attr,
1219         &dev_attr_erase_max.attr,
1220         &dev_attr_multiplane_modes.attr,
1221         &dev_attr_media_capabilities.attr,
1222         &dev_attr_max_phys_secs.attr,
1223
1224         NULL,
1225 };
1226
1227 static const struct attribute_group nvm_dev_attr_group_12 = {
1228         .name           = "lightnvm",
1229         .attrs          = nvm_dev_attrs_12,
1230 };
1231
1232 /* 2.0 values */
1233 static NVM_DEV_ATTR_20_RO(groups);
1234 static NVM_DEV_ATTR_20_RO(punits);
1235 static NVM_DEV_ATTR_20_RO(chunks);
1236 static NVM_DEV_ATTR_20_RO(clba);
1237 static NVM_DEV_ATTR_20_RO(ws_min);
1238 static NVM_DEV_ATTR_20_RO(ws_opt);
1239 static NVM_DEV_ATTR_20_RO(maxoc);
1240 static NVM_DEV_ATTR_20_RO(maxocpu);
1241 static NVM_DEV_ATTR_20_RO(mw_cunits);
1242 static NVM_DEV_ATTR_20_RO(write_typ);
1243 static NVM_DEV_ATTR_20_RO(write_max);
1244 static NVM_DEV_ATTR_20_RO(reset_typ);
1245 static NVM_DEV_ATTR_20_RO(reset_max);
1246
1247 static struct attribute *nvm_dev_attrs_20[] = {
1248         &dev_attr_version.attr,
1249         &dev_attr_capabilities.attr,
1250
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_read_typ.attr,
1262         &dev_attr_read_max.attr,
1263         &dev_attr_write_typ.attr,
1264         &dev_attr_write_max.attr,
1265         &dev_attr_reset_typ.attr,
1266         &dev_attr_reset_max.attr,
1267
1268         NULL,
1269 };
1270
1271 static const struct attribute_group nvm_dev_attr_group_20 = {
1272         .name           = "lightnvm",
1273         .attrs          = nvm_dev_attrs_20,
1274 };
1275
1276 int nvme_nvm_register_sysfs(struct nvme_ns *ns)
1277 {
1278         struct nvm_dev *ndev = ns->ndev;
1279         struct nvm_geo *geo = &ndev->geo;
1280
1281         if (!ndev)
1282                 return -EINVAL;
1283
1284         switch (geo->major_ver_id) {
1285         case 1:
1286                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1287                                         &nvm_dev_attr_group_12);
1288         case 2:
1289                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1290                                         &nvm_dev_attr_group_20);
1291         }
1292
1293         return -EINVAL;
1294 }
1295
1296 void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
1297 {
1298         struct nvm_dev *ndev = ns->ndev;
1299         struct nvm_geo *geo = &ndev->geo;
1300
1301         switch (geo->major_ver_id) {
1302         case 1:
1303                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1304                                         &nvm_dev_attr_group_12);
1305                 break;
1306         case 2:
1307                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1308                                         &nvm_dev_attr_group_20);
1309                 break;
1310         }
1311 }