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         if (!(geo->major_ver_id == 2 && geo->minor_ver_id == 0)) {
 418                 pr_err("nvm: OCSSD version not supported (v%d.%d)\n",
 419                                 geo->major_ver_id, geo->minor_ver_id);
 420                 return -EINVAL;
 421         }
 422
 423         geo->num_ch = le16_to_cpu(id->num_grp);
 424         geo->num_lun = le16_to_cpu(id->num_pu);
 425         geo->all_luns = geo->num_ch * geo->num_lun;
 426
 427         geo->num_chk = le32_to_cpu(id->num_chk);
 428         geo->clba = le32_to_cpu(id->clba);
 429
 430         geo->all_chunks = geo->all_luns * geo->num_chk;
 431         geo->total_secs = geo->clba * geo->all_chunks;
 432
 433         geo->ws_min = le32_to_cpu(id->ws_min);
 434         geo->ws_opt = le32_to_cpu(id->ws_opt);
 435         geo->mw_cunits = le32_to_cpu(id->mw_cunits);
 436         geo->maxoc = le32_to_cpu(id->maxoc);
 437         geo->maxocpu = le32_to_cpu(id->maxocpu);
 438
 439         geo->trdt = le32_to_cpu(id->trdt);
 440         geo->trdm = le32_to_cpu(id->trdm);
 441         geo->tprt = le32_to_cpu(id->twrt);
 442         geo->tprm = le32_to_cpu(id->twrm);
 443         geo->tbet = le32_to_cpu(id->tcrst);
 444         geo->tbem = le32_to_cpu(id->tcrsm);
 445
 446         nvme_nvm_set_addr_20(&geo->addrf, &id->lbaf);
 447
 448         return 0;
 449 }
 450
 451 static int nvme_nvm_identity(struct nvm_dev *nvmdev)
 452 {
 453         struct nvme_ns *ns = nvmdev->q->queuedata;
 454         struct nvme_nvm_id12 *id;
 455         struct nvme_nvm_command c = {};
 456         int ret;
 457
 458         c.identity.opcode = nvme_nvm_admin_identity;
 459         c.identity.nsid = cpu_to_le32(ns->head->ns_id);
 460
 461         id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL);
 462         if (!id)
 463                 return -ENOMEM;
 464
 465         ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
 466                                 id, sizeof(struct nvme_nvm_id12));
 467         if (ret) {
 468                 ret = -EIO;
 469                 goto out;
 470         }
 471
 472         /*
 473          * The 1.2 and 2.0 specifications share the first byte in their geometry
 474          * command to make it possible to know what version a device implements.
 475          */
 476         switch (id->ver_id) {
 477         case 1:
 478                 ret = nvme_nvm_setup_12(id, &nvmdev->geo);
 479                 break;
 480         case 2:
 481                 ret = nvme_nvm_setup_20((struct nvme_nvm_id20 *)id,
 482                                                         &nvmdev->geo);
 483                 break;
 484         default:
 485                 dev_err(ns->ctrl->device, "OCSSD revision not supported (%d)\n",
 486                                                         id->ver_id);
 487                 ret = -EINVAL;
 488         }
 489
 490 out:
 491         kfree(id);
 492         return ret;
 493 }
 494
 495 static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 496                                                                 u8 *blks)
 497 {
 498         struct request_queue *q = nvmdev->q;
 499         struct nvm_geo *geo = &nvmdev->geo;
 500         struct nvme_ns *ns = q->queuedata;
 501         struct nvme_ctrl *ctrl = ns->ctrl;
 502         struct nvme_nvm_command c = {};
 503         struct nvme_nvm_bb_tbl *bb_tbl;
 504         int nr_blks = geo->num_chk * geo->num_pln;
 505         int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
 506         int ret = 0;
 507
 508         c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
 509         c.get_bb.nsid = cpu_to_le32(ns->head->ns_id);
 510         c.get_bb.spba = cpu_to_le64(ppa.ppa);
 511
 512         bb_tbl = kzalloc(tblsz, GFP_KERNEL);
 513         if (!bb_tbl)
 514                 return -ENOMEM;
 515
 516         ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
 517                                                                 bb_tbl, tblsz);
 518         if (ret) {
 519                 dev_err(ctrl->device, "get bad block table failed (%d)\n", ret);
 520                 ret = -EIO;
 521                 goto out;
 522         }
 523
 524         if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
 525                 bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
 526                 dev_err(ctrl->device, "bbt format mismatch\n");
 527                 ret = -EINVAL;
 528                 goto out;
 529         }
 530
 531         if (le16_to_cpu(bb_tbl->verid) != 1) {
 532                 ret = -EINVAL;
 533                 dev_err(ctrl->device, "bbt version not supported\n");
 534                 goto out;
 535         }
 536
 537         if (le32_to_cpu(bb_tbl->tblks) != nr_blks) {
 538                 ret = -EINVAL;
 539                 dev_err(ctrl->device,
 540                                 "bbt unsuspected blocks returned (%u!=%u)",
 541                                 le32_to_cpu(bb_tbl->tblks), nr_blks);
 542                 goto out;
 543         }
 544
 545         memcpy(blks, bb_tbl->blk, geo->num_chk * geo->num_pln);
 546 out:
 547         kfree(bb_tbl);
 548         return ret;
 549 }
 550
 551 static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
 552                                                         int nr_ppas, int type)
 553 {
 554         struct nvme_ns *ns = nvmdev->q->queuedata;
 555         struct nvme_nvm_command c = {};
 556         int ret = 0;
 557
 558         c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
 559         c.set_bb.nsid = cpu_to_le32(ns->head->ns_id);
 560         c.set_bb.spba = cpu_to_le64(ppas->ppa);
 561         c.set_bb.nlb = cpu_to_le16(nr_ppas - 1);
 562         c.set_bb.value = type;
 563
 564         ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
 565                                                                 NULL, 0);
 566         if (ret)
 567                 dev_err(ns->ctrl->device, "set bad block table failed (%d)\n",
 568                                                                         ret);
 569         return ret;
 570 }
 571
 572 /*
 573  * Expect the lba in device format
 574  */
 575 static int nvme_nvm_get_chk_meta(struct nvm_dev *ndev,
 576                                  struct nvm_chk_meta *meta,
 577                                  sector_t slba, int nchks)
 578 {
 579         struct nvm_geo *geo = &ndev->geo;
 580         struct nvme_ns *ns = ndev->q->queuedata;
 581         struct nvme_ctrl *ctrl = ns->ctrl;
 582         struct nvme_nvm_chk_meta *dev_meta = (struct nvme_nvm_chk_meta *)meta;
 583         struct ppa_addr ppa;
 584         size_t left = nchks * sizeof(struct nvme_nvm_chk_meta);
 585         size_t log_pos, offset, len;
 586         int ret, i;
 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, ctrl->max_hw_sectors << 9);
 600
 601                 ret = nvme_get_log_ext(ctrl, ns, NVME_NVM_LOG_REPORT_CHUNK,
 602                                 dev_meta, len, offset);
 603                 if (ret) {
 604                         dev_err(ctrl->device, "Get REPORT CHUNK log error\n");
 605                         break;
 606                 }
 607
 608                 for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) {
 609                         meta->state = dev_meta->state;
 610                         meta->type = dev_meta->type;
 611                         meta->wi = dev_meta->wi;
 612                         meta->slba = le64_to_cpu(dev_meta->slba);
 613                         meta->cnlb = le64_to_cpu(dev_meta->cnlb);
 614                         meta->wp = le64_to_cpu(dev_meta->wp);
 615
 616                         meta++;
 617                         dev_meta++;
 618                 }
 619
 620                 offset += len;
 621                 left -= len;
 622         }
 623
 624         return ret;
 625 }
 626
 627 static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
 628                                     struct nvme_nvm_command *c)
 629 {
 630         c->ph_rw.opcode = rqd->opcode;
 631         c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 632         c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
 633         c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
 634         c->ph_rw.control = cpu_to_le16(rqd->flags);
 635         c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
 636 }
 637
 638 static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
 639 {
 640         struct nvm_rq *rqd = rq->end_io_data;
 641
 642         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 643         rqd->error = nvme_req(rq)->status;
 644         nvm_end_io(rqd);
 645
 646         kfree(nvme_req(rq)->cmd);
 647         blk_mq_free_request(rq);
 648 }
 649
 650 static struct request *nvme_nvm_alloc_request(struct request_queue *q,
 651                                               struct nvm_rq *rqd,
 652                                               struct nvme_nvm_command *cmd)
 653 {
 654         struct nvme_ns *ns = q->queuedata;
 655         struct request *rq;
 656
 657         nvme_nvm_rqtocmd(rqd, ns, cmd);
 658
 659         rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
 660         if (IS_ERR(rq))
 661                 return rq;
 662
 663         rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
 664
 665         if (rqd->bio) {
 666                 blk_init_request_from_bio(rq, rqd->bio);
 667         } else {
 668                 rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
 669                 rq->__data_len = 0;
 670         }
 671
 672         return rq;
 673 }
 674
 675 static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 676 {
 677         struct request_queue *q = dev->q;
 678         struct nvme_nvm_command *cmd;
 679         struct request *rq;
 680
 681         cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
 682         if (!cmd)
 683                 return -ENOMEM;
 684
 685         rq = nvme_nvm_alloc_request(q, rqd, cmd);
 686         if (IS_ERR(rq)) {
 687                 kfree(cmd);
 688                 return PTR_ERR(rq);
 689         }
 690
 691         rq->end_io_data = rqd;
 692
 693         blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
 694
 695         return 0;
 696 }
 697
 698 static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
 699 {
 700         struct request_queue *q = dev->q;
 701         struct request *rq;
 702         struct nvme_nvm_command cmd;
 703         int ret = 0;
 704
 705         memset(&cmd, 0, sizeof(struct nvme_nvm_command));
 706
 707         rq = nvme_nvm_alloc_request(q, rqd, &cmd);
 708         if (IS_ERR(rq))
 709                 return PTR_ERR(rq);
 710
 711         /* I/Os can fail and the error is signaled through rqd. Callers must
 712          * handle the error accordingly.
 713          */
 714         blk_execute_rq(q, NULL, rq, 0);
 715         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 716                 ret = -EINTR;
 717
 718         rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
 719         rqd->error = nvme_req(rq)->status;
 720
 721         blk_mq_free_request(rq);
 722
 723         return ret;
 724 }
 725
 726 static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
 727 {
 728         struct nvme_ns *ns = nvmdev->q->queuedata;
 729
 730         return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0);
 731 }
 732
 733 static void nvme_nvm_destroy_dma_pool(void *pool)
 734 {
 735         struct dma_pool *dma_pool = pool;
 736
 737         dma_pool_destroy(dma_pool);
 738 }
 739
 740 static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
 741                                     gfp_t mem_flags, dma_addr_t *dma_handler)
 742 {
 743         return dma_pool_alloc(pool, mem_flags, dma_handler);
 744 }
 745
 746 static void nvme_nvm_dev_dma_free(void *pool, void *addr,
 747                                                         dma_addr_t dma_handler)
 748 {
 749         dma_pool_free(pool, addr, dma_handler);
 750 }
 751
 752 static struct nvm_dev_ops nvme_nvm_dev_ops = {
 753         .identity               = nvme_nvm_identity,
 754
 755         .get_bb_tbl             = nvme_nvm_get_bb_tbl,
 756         .set_bb_tbl             = nvme_nvm_set_bb_tbl,
 757
 758         .get_chk_meta           = nvme_nvm_get_chk_meta,
 759
 760         .submit_io              = nvme_nvm_submit_io,
 761         .submit_io_sync         = nvme_nvm_submit_io_sync,
 762
 763         .create_dma_pool        = nvme_nvm_create_dma_pool,
 764         .destroy_dma_pool       = nvme_nvm_destroy_dma_pool,
 765         .dev_dma_alloc          = nvme_nvm_dev_dma_alloc,
 766         .dev_dma_free           = nvme_nvm_dev_dma_free,
 767 };
 768
 769 static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 770                                 struct nvme_ns *ns,
 771                                 struct nvme_nvm_command *vcmd,
 772                                 void __user *ubuf, unsigned int bufflen,
 773                                 void __user *meta_buf, unsigned int meta_len,
 774                                 void __user *ppa_buf, unsigned int ppa_len,
 775                                 u32 *result, u64 *status, unsigned int timeout)
 776 {
 777         bool write = nvme_is_write((struct nvme_command *)vcmd);
 778         struct nvm_dev *dev = ns->ndev;
 779         struct gendisk *disk = ns->disk;
 780         struct request *rq;
 781         struct bio *bio = NULL;
 782         __le64 *ppa_list = NULL;
 783         dma_addr_t ppa_dma;
 784         __le64 *metadata = NULL;
 785         dma_addr_t metadata_dma;
 786         DECLARE_COMPLETION_ONSTACK(wait);
 787         int ret = 0;
 788
 789         rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
 790                         NVME_QID_ANY);
 791         if (IS_ERR(rq)) {
 792                 ret = -ENOMEM;
 793                 goto err_cmd;
 794         }
 795
 796         rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
 797
 798         if (ppa_buf && ppa_len) {
 799                 ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
 800                 if (!ppa_list) {
 801                         ret = -ENOMEM;
 802                         goto err_rq;
 803                 }
 804                 if (copy_from_user(ppa_list, (void __user *)ppa_buf,
 805                                                 sizeof(u64) * (ppa_len + 1))) {
 806                         ret = -EFAULT;
 807                         goto err_ppa;
 808                 }
 809                 vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
 810         } else {
 811                 vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
 812         }
 813
 814         if (ubuf && bufflen) {
 815                 ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
 816                 if (ret)
 817                         goto err_ppa;
 818                 bio = rq->bio;
 819
 820                 if (meta_buf && meta_len) {
 821                         metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
 822                                                                 &metadata_dma);
 823                         if (!metadata) {
 824                                 ret = -ENOMEM;
 825                                 goto err_map;
 826                         }
 827
 828                         if (write) {
 829                                 if (copy_from_user(metadata,
 830                                                 (void __user *)meta_buf,
 831                                                 meta_len)) {
 832                                         ret = -EFAULT;
 833                                         goto err_meta;
 834                                 }
 835                         }
 836                         vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
 837                 }
 838
 839                 bio->bi_disk = disk;
 840         }
 841
 842         blk_execute_rq(q, NULL, rq, 0);
 843
 844         if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
 845                 ret = -EINTR;
 846         else if (nvme_req(rq)->status & 0x7ff)
 847                 ret = -EIO;
 848         if (result)
 849                 *result = nvme_req(rq)->status & 0x7ff;
 850         if (status)
 851                 *status = le64_to_cpu(nvme_req(rq)->result.u64);
 852
 853         if (metadata && !ret && !write) {
 854                 if (copy_to_user(meta_buf, (void *)metadata, meta_len))
 855                         ret = -EFAULT;
 856         }
 857 err_meta:
 858         if (meta_buf && meta_len)
 859                 dma_pool_free(dev->dma_pool, metadata, metadata_dma);
 860 err_map:
 861         if (bio)
 862                 blk_rq_unmap_user(bio);
 863 err_ppa:
 864         if (ppa_buf && ppa_len)
 865                 dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
 866 err_rq:
 867         blk_mq_free_request(rq);
 868 err_cmd:
 869         return ret;
 870 }
 871
 872 static int nvme_nvm_submit_vio(struct nvme_ns *ns,
 873                                         struct nvm_user_vio __user *uvio)
 874 {
 875         struct nvm_user_vio vio;
 876         struct nvme_nvm_command c;
 877         unsigned int length;
 878         int ret;
 879
 880         if (copy_from_user(&vio, uvio, sizeof(vio)))
 881                 return -EFAULT;
 882         if (vio.flags)
 883                 return -EINVAL;
 884
 885         memset(&c, 0, sizeof(c));
 886         c.ph_rw.opcode = vio.opcode;
 887         c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
 888         c.ph_rw.control = cpu_to_le16(vio.control);
 889         c.ph_rw.length = cpu_to_le16(vio.nppas);
 890
 891         length = (vio.nppas + 1) << ns->lba_shift;
 892
 893         ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
 894                         (void __user *)(uintptr_t)vio.addr, length,
 895                         (void __user *)(uintptr_t)vio.metadata,
 896                                                         vio.metadata_len,
 897                         (void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
 898                         &vio.result, &vio.status, 0);
 899
 900         if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
 901                 return -EFAULT;
 902
 903         return ret;
 904 }
 905
 906 static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
 907                                         struct nvm_passthru_vio __user *uvcmd)
 908 {
 909         struct nvm_passthru_vio vcmd;
 910         struct nvme_nvm_command c;
 911         struct request_queue *q;
 912         unsigned int timeout = 0;
 913         int ret;
 914
 915         if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
 916                 return -EFAULT;
 917         if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
 918                 return -EACCES;
 919         if (vcmd.flags)
 920                 return -EINVAL;
 921
 922         memset(&c, 0, sizeof(c));
 923         c.common.opcode = vcmd.opcode;
 924         c.common.nsid = cpu_to_le32(ns->head->ns_id);
 925         c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
 926         c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
 927         /* cdw11-12 */
 928         c.ph_rw.length = cpu_to_le16(vcmd.nppas);
 929         c.ph_rw.control  = cpu_to_le16(vcmd.control);
 930         c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
 931         c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
 932         c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
 933
 934         if (vcmd.timeout_ms)
 935                 timeout = msecs_to_jiffies(vcmd.timeout_ms);
 936
 937         q = admin ? ns->ctrl->admin_q : ns->queue;
 938
 939         ret = nvme_nvm_submit_user_cmd(q, ns,
 940                         (struct nvme_nvm_command *)&c,
 941                         (void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
 942                         (void __user *)(uintptr_t)vcmd.metadata,
 943                                                         vcmd.metadata_len,
 944                         (void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
 945                         &vcmd.result, &vcmd.status, timeout);
 946
 947         if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
 948                 return -EFAULT;
 949
 950         return ret;
 951 }
 952
 953 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
 954 {
 955         switch (cmd) {
 956         case NVME_NVM_IOCTL_ADMIN_VIO:
 957                 return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg);
 958         case NVME_NVM_IOCTL_IO_VIO:
 959                 return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg);
 960         case NVME_NVM_IOCTL_SUBMIT_VIO:
 961                 return nvme_nvm_submit_vio(ns, (void __user *)arg);
 962         default:
 963                 return -ENOTTY;
 964         }
 965 }
 966
 967 void nvme_nvm_update_nvm_info(struct nvme_ns *ns)
 968 {
 969         struct nvm_dev *ndev = ns->ndev;
 970         struct nvm_geo *geo = &ndev->geo;
 971
 972         geo->csecs = 1 << ns->lba_shift;
 973         geo->sos = ns->ms;
 974 }
 975
 976 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
 977 {
 978         struct request_queue *q = ns->queue;
 979         struct nvm_dev *dev;
 980
 981         _nvme_nvm_check_size();
 982
 983         dev = nvm_alloc_dev(node);
 984         if (!dev)
 985                 return -ENOMEM;
 986
 987         dev->q = q;
 988         memcpy(dev->name, disk_name, DISK_NAME_LEN);
 989         dev->ops = &nvme_nvm_dev_ops;
 990         dev->private_data = ns;
 991         ns->ndev = dev;
 992
 993         return nvm_register(dev);
 994 }
 995
 996 void nvme_nvm_unregister(struct nvme_ns *ns)
 997 {
 998         nvm_unregister(ns->ndev);
 999 }
1000
1001 static ssize_t nvm_dev_attr_show(struct device *dev,
1002                 struct device_attribute *dattr, char *page)
1003 {
1004         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1005         struct nvm_dev *ndev = ns->ndev;
1006         struct nvm_geo *geo = &ndev->geo;
1007         struct attribute *attr;
1008
1009         if (!ndev)
1010                 return 0;
1011
1012         attr = &dattr->attr;
1013
1014         if (strcmp(attr->name, "version") == 0) {
1015                 if (geo->major_ver_id == 1)
1016                         return scnprintf(page, PAGE_SIZE, "%u\n",
1017                                                 geo->major_ver_id);
1018                 else
1019                         return scnprintf(page, PAGE_SIZE, "%u.%u\n",
1020                                                 geo->major_ver_id,
1021                                                 geo->minor_ver_id);
1022         } else if (strcmp(attr->name, "capabilities") == 0) {
1023                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->cap);
1024         } else if (strcmp(attr->name, "read_typ") == 0) {
1025                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdt);
1026         } else if (strcmp(attr->name, "read_max") == 0) {
1027                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdm);
1028         } else {
1029                 return scnprintf(page,
1030                                  PAGE_SIZE,
1031                                  "Unhandled attr(%s) in `%s`\n",
1032                                  attr->name, __func__);
1033         }
1034 }
1035
1036 static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addrf_12 *ppaf, char *page)
1037 {
1038         return scnprintf(page, PAGE_SIZE,
1039                 "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1040                                 ppaf->ch_offset, ppaf->ch_len,
1041                                 ppaf->lun_offset, ppaf->lun_len,
1042                                 ppaf->pln_offset, ppaf->pln_len,
1043                                 ppaf->blk_offset, ppaf->blk_len,
1044                                 ppaf->pg_offset, ppaf->pg_len,
1045                                 ppaf->sec_offset, ppaf->sec_len);
1046 }
1047
1048 static ssize_t nvm_dev_attr_show_12(struct device *dev,
1049                 struct device_attribute *dattr, char *page)
1050 {
1051         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1052         struct nvm_dev *ndev = ns->ndev;
1053         struct nvm_geo *geo = &ndev->geo;
1054         struct attribute *attr;
1055
1056         if (!ndev)
1057                 return 0;
1058
1059         attr = &dattr->attr;
1060
1061         if (strcmp(attr->name, "vendor_opcode") == 0) {
1062                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->vmnt);
1063         } else if (strcmp(attr->name, "device_mode") == 0) {
1064                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->dom);
1065         /* kept for compatibility */
1066         } else if (strcmp(attr->name, "media_manager") == 0) {
1067                 return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
1068         } else if (strcmp(attr->name, "ppa_format") == 0) {
1069                 return nvm_dev_attr_show_ppaf((void *)&geo->addrf, page);
1070         } else if (strcmp(attr->name, "media_type") == 0) {     /* u8 */
1071                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mtype);
1072         } else if (strcmp(attr->name, "flash_media_type") == 0) {
1073                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fmtype);
1074         } else if (strcmp(attr->name, "num_channels") == 0) {
1075                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1076         } else if (strcmp(attr->name, "num_luns") == 0) {
1077                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1078         } else if (strcmp(attr->name, "num_planes") == 0) {
1079                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pln);
1080         } else if (strcmp(attr->name, "num_blocks") == 0) {     /* u16 */
1081                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1082         } else if (strcmp(attr->name, "num_pages") == 0) {
1083                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pg);
1084         } else if (strcmp(attr->name, "page_size") == 0) {
1085                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->fpg_sz);
1086         } else if (strcmp(attr->name, "hw_sector_size") == 0) {
1087                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->csecs);
1088         } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
1089                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->sos);
1090         } else if (strcmp(attr->name, "prog_typ") == 0) {
1091                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1092         } else if (strcmp(attr->name, "prog_max") == 0) {
1093                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1094         } else if (strcmp(attr->name, "erase_typ") == 0) {
1095                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1096         } else if (strcmp(attr->name, "erase_max") == 0) {
1097                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1098         } else if (strcmp(attr->name, "multiplane_modes") == 0) {
1099                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mpos);
1100         } else if (strcmp(attr->name, "media_capabilities") == 0) {
1101                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mccap);
1102         } else if (strcmp(attr->name, "max_phys_secs") == 0) {
1103                 return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
1104         } else {
1105                 return scnprintf(page, PAGE_SIZE,
1106                         "Unhandled attr(%s) in `%s`\n",
1107                         attr->name, __func__);
1108         }
1109 }
1110
1111 static ssize_t nvm_dev_attr_show_20(struct device *dev,
1112                 struct device_attribute *dattr, char *page)
1113 {
1114         struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
1115         struct nvm_dev *ndev = ns->ndev;
1116         struct nvm_geo *geo = &ndev->geo;
1117         struct attribute *attr;
1118
1119         if (!ndev)
1120                 return 0;
1121
1122         attr = &dattr->attr;
1123
1124         if (strcmp(attr->name, "groups") == 0) {
1125                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
1126         } else if (strcmp(attr->name, "punits") == 0) {
1127                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
1128         } else if (strcmp(attr->name, "chunks") == 0) {
1129                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
1130         } else if (strcmp(attr->name, "clba") == 0) {
1131                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->clba);
1132         } else if (strcmp(attr->name, "ws_min") == 0) {
1133                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_min);
1134         } else if (strcmp(attr->name, "ws_opt") == 0) {
1135                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_opt);
1136         } else if (strcmp(attr->name, "maxoc") == 0) {
1137                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxoc);
1138         } else if (strcmp(attr->name, "maxocpu") == 0) {
1139                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxocpu);
1140         } else if (strcmp(attr->name, "mw_cunits") == 0) {
1141                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->mw_cunits);
1142         } else if (strcmp(attr->name, "write_typ") == 0) {
1143                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
1144         } else if (strcmp(attr->name, "write_max") == 0) {
1145                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
1146         } else if (strcmp(attr->name, "reset_typ") == 0) {
1147                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
1148         } else if (strcmp(attr->name, "reset_max") == 0) {
1149                 return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
1150         } else {
1151                 return scnprintf(page, PAGE_SIZE,
1152                         "Unhandled attr(%s) in `%s`\n",
1153                         attr->name, __func__);
1154         }
1155 }
1156
1157 #define NVM_DEV_ATTR_RO(_name)                                  \
1158         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
1159 #define NVM_DEV_ATTR_12_RO(_name)                                       \
1160         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL)
1161 #define NVM_DEV_ATTR_20_RO(_name)                                       \
1162         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL)
1163
1164 /* general attributes */
1165 static NVM_DEV_ATTR_RO(version);
1166 static NVM_DEV_ATTR_RO(capabilities);
1167
1168 static NVM_DEV_ATTR_RO(read_typ);
1169 static NVM_DEV_ATTR_RO(read_max);
1170
1171 /* 1.2 values */
1172 static NVM_DEV_ATTR_12_RO(vendor_opcode);
1173 static NVM_DEV_ATTR_12_RO(device_mode);
1174 static NVM_DEV_ATTR_12_RO(ppa_format);
1175 static NVM_DEV_ATTR_12_RO(media_manager);
1176 static NVM_DEV_ATTR_12_RO(media_type);
1177 static NVM_DEV_ATTR_12_RO(flash_media_type);
1178 static NVM_DEV_ATTR_12_RO(num_channels);
1179 static NVM_DEV_ATTR_12_RO(num_luns);
1180 static NVM_DEV_ATTR_12_RO(num_planes);
1181 static NVM_DEV_ATTR_12_RO(num_blocks);
1182 static NVM_DEV_ATTR_12_RO(num_pages);
1183 static NVM_DEV_ATTR_12_RO(page_size);
1184 static NVM_DEV_ATTR_12_RO(hw_sector_size);
1185 static NVM_DEV_ATTR_12_RO(oob_sector_size);
1186 static NVM_DEV_ATTR_12_RO(prog_typ);
1187 static NVM_DEV_ATTR_12_RO(prog_max);
1188 static NVM_DEV_ATTR_12_RO(erase_typ);
1189 static NVM_DEV_ATTR_12_RO(erase_max);
1190 static NVM_DEV_ATTR_12_RO(multiplane_modes);
1191 static NVM_DEV_ATTR_12_RO(media_capabilities);
1192 static NVM_DEV_ATTR_12_RO(max_phys_secs);
1193
1194 static struct attribute *nvm_dev_attrs_12[] = {
1195         &dev_attr_version.attr,
1196         &dev_attr_capabilities.attr,
1197
1198         &dev_attr_vendor_opcode.attr,
1199         &dev_attr_device_mode.attr,
1200         &dev_attr_media_manager.attr,
1201         &dev_attr_ppa_format.attr,
1202         &dev_attr_media_type.attr,
1203         &dev_attr_flash_media_type.attr,
1204         &dev_attr_num_channels.attr,
1205         &dev_attr_num_luns.attr,
1206         &dev_attr_num_planes.attr,
1207         &dev_attr_num_blocks.attr,
1208         &dev_attr_num_pages.attr,
1209         &dev_attr_page_size.attr,
1210         &dev_attr_hw_sector_size.attr,
1211         &dev_attr_oob_sector_size.attr,
1212         &dev_attr_read_typ.attr,
1213         &dev_attr_read_max.attr,
1214         &dev_attr_prog_typ.attr,
1215         &dev_attr_prog_max.attr,
1216         &dev_attr_erase_typ.attr,
1217         &dev_attr_erase_max.attr,
1218         &dev_attr_multiplane_modes.attr,
1219         &dev_attr_media_capabilities.attr,
1220         &dev_attr_max_phys_secs.attr,
1221
1222         NULL,
1223 };
1224
1225 static const struct attribute_group nvm_dev_attr_group_12 = {
1226         .name           = "lightnvm",
1227         .attrs          = nvm_dev_attrs_12,
1228 };
1229
1230 /* 2.0 values */
1231 static NVM_DEV_ATTR_20_RO(groups);
1232 static NVM_DEV_ATTR_20_RO(punits);
1233 static NVM_DEV_ATTR_20_RO(chunks);
1234 static NVM_DEV_ATTR_20_RO(clba);
1235 static NVM_DEV_ATTR_20_RO(ws_min);
1236 static NVM_DEV_ATTR_20_RO(ws_opt);
1237 static NVM_DEV_ATTR_20_RO(maxoc);
1238 static NVM_DEV_ATTR_20_RO(maxocpu);
1239 static NVM_DEV_ATTR_20_RO(mw_cunits);
1240 static NVM_DEV_ATTR_20_RO(write_typ);
1241 static NVM_DEV_ATTR_20_RO(write_max);
1242 static NVM_DEV_ATTR_20_RO(reset_typ);
1243 static NVM_DEV_ATTR_20_RO(reset_max);
1244
1245 static struct attribute *nvm_dev_attrs_20[] = {
1246         &dev_attr_version.attr,
1247         &dev_attr_capabilities.attr,
1248
1249         &dev_attr_groups.attr,
1250         &dev_attr_punits.attr,
1251         &dev_attr_chunks.attr,
1252         &dev_attr_clba.attr,
1253         &dev_attr_ws_min.attr,
1254         &dev_attr_ws_opt.attr,
1255         &dev_attr_maxoc.attr,
1256         &dev_attr_maxocpu.attr,
1257         &dev_attr_mw_cunits.attr,
1258
1259         &dev_attr_read_typ.attr,
1260         &dev_attr_read_max.attr,
1261         &dev_attr_write_typ.attr,
1262         &dev_attr_write_max.attr,
1263         &dev_attr_reset_typ.attr,
1264         &dev_attr_reset_max.attr,
1265
1266         NULL,
1267 };
1268
1269 static const struct attribute_group nvm_dev_attr_group_20 = {
1270         .name           = "lightnvm",
1271         .attrs          = nvm_dev_attrs_20,
1272 };
1273
1274 int nvme_nvm_register_sysfs(struct nvme_ns *ns)
1275 {
1276         struct nvm_dev *ndev = ns->ndev;
1277         struct nvm_geo *geo = &ndev->geo;
1278
1279         if (!ndev)
1280                 return -EINVAL;
1281
1282         switch (geo->major_ver_id) {
1283         case 1:
1284                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1285                                         &nvm_dev_attr_group_12);
1286         case 2:
1287                 return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
1288                                         &nvm_dev_attr_group_20);
1289         }
1290
1291         return -EINVAL;
1292 }
1293
1294 void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
1295 {
1296         struct nvm_dev *ndev = ns->ndev;
1297         struct nvm_geo *geo = &ndev->geo;
1298
1299         switch (geo->major_ver_id) {
1300         case 1:
1301                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1302                                         &nvm_dev_attr_group_12);
1303                 break;
1304         case 2:
1305                 sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
1306                                         &nvm_dev_attr_group_20);
1307                 break;
1308         }
1309 }