include/linux/nvme.h

   1 /*
   2  * Definitions for the NVM Express interface
   3  * Copyright (c) 2011-2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #ifndef _LINUX_NVME_H
  16 #define _LINUX_NVME_H
  17
  18 #include <linux/types.h>
  19
  20 /* NQN names in commands fields specified one size */
  21 #define NVMF_NQN_FIELD_LEN      256
  22
  23 /* However the max length of a qualified name is another size */
  24 #define NVMF_NQN_SIZE           223
  25
  26 #define NVMF_TRSVCID_SIZE       32
  27 #define NVMF_TRADDR_SIZE        256
  28 #define NVMF_TSAS_SIZE          256
  29
  30 #define NVME_DISC_SUBSYS_NAME   "nqn.2014-08.org.nvmexpress.discovery"
  31
  32 #define NVME_RDMA_IP_PORT       4420
  33
  34 enum nvme_subsys_type {
  35         NVME_NQN_DISC   = 1,            /* Discovery type target subsystem */
  36         NVME_NQN_NVME   = 2,            /* NVME type target subsystem */
  37 };
  38
  39 /* Address Family codes for Discovery Log Page entry ADRFAM field */
  40 enum {
  41         NVMF_ADDR_FAMILY_PCI    = 0,    /* PCIe */
  42         NVMF_ADDR_FAMILY_IP4    = 1,    /* IP4 */
  43         NVMF_ADDR_FAMILY_IP6    = 2,    /* IP6 */
  44         NVMF_ADDR_FAMILY_IB     = 3,    /* InfiniBand */
  45         NVMF_ADDR_FAMILY_FC     = 4,    /* Fibre Channel */
  46 };
  47
  48 /* Transport Type codes for Discovery Log Page entry TRTYPE field */
  49 enum {
  50         NVMF_TRTYPE_RDMA        = 1,    /* RDMA */
  51         NVMF_TRTYPE_FC          = 2,    /* Fibre Channel */
  52         NVMF_TRTYPE_LOOP        = 254,  /* Reserved for host usage */
  53         NVMF_TRTYPE_MAX,
  54 };
  55
  56 /* Transport Requirements codes for Discovery Log Page entry TREQ field */
  57 enum {
  58         NVMF_TREQ_NOT_SPECIFIED = 0,    /* Not specified */
  59         NVMF_TREQ_REQUIRED      = 1,    /* Required */
  60         NVMF_TREQ_NOT_REQUIRED  = 2,    /* Not Required */
  61 };
  62
  63 /* RDMA QP Service Type codes for Discovery Log Page entry TSAS
  64  * RDMA_QPTYPE field
  65  */
  66 enum {
  67         NVMF_RDMA_QPTYPE_CONNECTED      = 1, /* Reliable Connected */
  68         NVMF_RDMA_QPTYPE_DATAGRAM       = 2, /* Reliable Datagram */
  69 };
  70
  71 /* RDMA QP Service Type codes for Discovery Log Page entry TSAS
  72  * RDMA_QPTYPE field
  73  */
  74 enum {
  75         NVMF_RDMA_PRTYPE_NOT_SPECIFIED  = 1, /* No Provider Specified */
  76         NVMF_RDMA_PRTYPE_IB             = 2, /* InfiniBand */
  77         NVMF_RDMA_PRTYPE_ROCE           = 3, /* InfiniBand RoCE */
  78         NVMF_RDMA_PRTYPE_ROCEV2         = 4, /* InfiniBand RoCEV2 */
  79         NVMF_RDMA_PRTYPE_IWARP          = 5, /* IWARP */
  80 };
  81
  82 /* RDMA Connection Management Service Type codes for Discovery Log Page
  83  * entry TSAS RDMA_CMS field
  84  */
  85 enum {
  86         NVMF_RDMA_CMS_RDMA_CM   = 1, /* Sockets based endpoint addressing */
  87 };
  88
  89 #define NVMF_AQ_DEPTH           32
  90
  91 enum {
  92         NVME_REG_CAP    = 0x0000,       /* Controller Capabilities */
  93         NVME_REG_VS     = 0x0008,       /* Version */
  94         NVME_REG_INTMS  = 0x000c,       /* Interrupt Mask Set */
  95         NVME_REG_INTMC  = 0x0010,       /* Interrupt Mask Clear */
  96         NVME_REG_CC     = 0x0014,       /* Controller Configuration */
  97         NVME_REG_CSTS   = 0x001c,       /* Controller Status */
  98         NVME_REG_NSSR   = 0x0020,       /* NVM Subsystem Reset */
  99         NVME_REG_AQA    = 0x0024,       /* Admin Queue Attributes */
 100         NVME_REG_ASQ    = 0x0028,       /* Admin SQ Base Address */
 101         NVME_REG_ACQ    = 0x0030,       /* Admin CQ Base Address */
 102         NVME_REG_CMBLOC = 0x0038,       /* Controller Memory Buffer Location */
 103         NVME_REG_CMBSZ  = 0x003c,       /* Controller Memory Buffer Size */
 104 };
 105
 106 #define NVME_CAP_MQES(cap)      ((cap) & 0xffff)
 107 #define NVME_CAP_TIMEOUT(cap)   (((cap) >> 24) & 0xff)
 108 #define NVME_CAP_STRIDE(cap)    (((cap) >> 32) & 0xf)
 109 #define NVME_CAP_NSSRC(cap)     (((cap) >> 36) & 0x1)
 110 #define NVME_CAP_MPSMIN(cap)    (((cap) >> 48) & 0xf)
 111 #define NVME_CAP_MPSMAX(cap)    (((cap) >> 52) & 0xf)
 112
 113 #define NVME_CMB_BIR(cmbloc)    ((cmbloc) & 0x7)
 114 #define NVME_CMB_OFST(cmbloc)   (((cmbloc) >> 12) & 0xfffff)
 115 #define NVME_CMB_SZ(cmbsz)      (((cmbsz) >> 12) & 0xfffff)
 116 #define NVME_CMB_SZU(cmbsz)     (((cmbsz) >> 8) & 0xf)
 117
 118 #define NVME_CMB_WDS(cmbsz)     ((cmbsz) & 0x10)
 119 #define NVME_CMB_RDS(cmbsz)     ((cmbsz) & 0x8)
 120 #define NVME_CMB_LISTS(cmbsz)   ((cmbsz) & 0x4)
 121 #define NVME_CMB_CQS(cmbsz)     ((cmbsz) & 0x2)
 122 #define NVME_CMB_SQS(cmbsz)     ((cmbsz) & 0x1)
 123
 124 /*
 125  * Submission and Completion Queue Entry Sizes for the NVM command set.
 126  * (In bytes and specified as a power of two (2^n)).
 127  */
 128 #define NVME_NVM_IOSQES         6
 129 #define NVME_NVM_IOCQES         4
 130
 131 enum {
 132         NVME_CC_ENABLE          = 1 << 0,
 133         NVME_CC_CSS_NVM         = 0 << 4,
 134         NVME_CC_MPS_SHIFT       = 7,
 135         NVME_CC_ARB_RR          = 0 << 11,
 136         NVME_CC_ARB_WRRU        = 1 << 11,
 137         NVME_CC_ARB_VS          = 7 << 11,
 138         NVME_CC_SHN_NONE        = 0 << 14,
 139         NVME_CC_SHN_NORMAL      = 1 << 14,
 140         NVME_CC_SHN_ABRUPT      = 2 << 14,
 141         NVME_CC_SHN_MASK        = 3 << 14,
 142         NVME_CC_IOSQES          = NVME_NVM_IOSQES << 16,
 143         NVME_CC_IOCQES          = NVME_NVM_IOCQES << 20,
 144         NVME_CSTS_RDY           = 1 << 0,
 145         NVME_CSTS_CFS           = 1 << 1,
 146         NVME_CSTS_NSSRO         = 1 << 4,
 147         NVME_CSTS_SHST_NORMAL   = 0 << 2,
 148         NVME_CSTS_SHST_OCCUR    = 1 << 2,
 149         NVME_CSTS_SHST_CMPLT    = 2 << 2,
 150         NVME_CSTS_SHST_MASK     = 3 << 2,
 151 };
 152
 153 struct nvme_id_power_state {
 154         __le16                  max_power;      /* centiwatts */
 155         __u8                    rsvd2;
 156         __u8                    flags;
 157         __le32                  entry_lat;      /* microseconds */
 158         __le32                  exit_lat;       /* microseconds */
 159         __u8                    read_tput;
 160         __u8                    read_lat;
 161         __u8                    write_tput;
 162         __u8                    write_lat;
 163         __le16                  idle_power;
 164         __u8                    idle_scale;
 165         __u8                    rsvd19;
 166         __le16                  active_power;
 167         __u8                    active_work_scale;
 168         __u8                    rsvd23[9];
 169 };
 170
 171 enum {
 172         NVME_PS_FLAGS_MAX_POWER_SCALE   = 1 << 0,
 173         NVME_PS_FLAGS_NON_OP_STATE      = 1 << 1,
 174 };
 175
 176 struct nvme_id_ctrl {
 177         __le16                  vid;
 178         __le16                  ssvid;
 179         char                    sn[20];
 180         char                    mn[40];
 181         char                    fr[8];
 182         __u8                    rab;
 183         __u8                    ieee[3];
 184         __u8                    cmic;
 185         __u8                    mdts;
 186         __le16                  cntlid;
 187         __le32                  ver;
 188         __le32                  rtd3r;
 189         __le32                  rtd3e;
 190         __le32                  oaes;
 191         __le32                  ctratt;
 192         __u8                    rsvd100[156];
 193         __le16                  oacs;
 194         __u8                    acl;
 195         __u8                    aerl;
 196         __u8                    frmw;
 197         __u8                    lpa;
 198         __u8                    elpe;
 199         __u8                    npss;
 200         __u8                    avscc;
 201         __u8                    apsta;
 202         __le16                  wctemp;
 203         __le16                  cctemp;
 204         __le16                  mtfa;
 205         __le32                  hmpre;
 206         __le32                  hmmin;
 207         __u8                    tnvmcap[16];
 208         __u8                    unvmcap[16];
 209         __le32                  rpmbs;
 210         __u8                    rsvd316[4];
 211         __le16                  kas;
 212         __u8                    rsvd322[190];
 213         __u8                    sqes;
 214         __u8                    cqes;
 215         __le16                  maxcmd;
 216         __le32                  nn;
 217         __le16                  oncs;
 218         __le16                  fuses;
 219         __u8                    fna;
 220         __u8                    vwc;
 221         __le16                  awun;
 222         __le16                  awupf;
 223         __u8                    nvscc;
 224         __u8                    rsvd531;
 225         __le16                  acwu;
 226         __u8                    rsvd534[2];
 227         __le32                  sgls;
 228         __u8                    rsvd540[228];
 229         char                    subnqn[256];
 230         __u8                    rsvd1024[768];
 231         __le32                  ioccsz;
 232         __le32                  iorcsz;
 233         __le16                  icdoff;
 234         __u8                    ctrattr;
 235         __u8                    msdbd;
 236         __u8                    rsvd1804[244];
 237         struct nvme_id_power_state      psd[32];
 238         __u8                    vs[1024];
 239 };
 240
 241 enum {
 242         NVME_CTRL_ONCS_COMPARE                  = 1 << 0,
 243         NVME_CTRL_ONCS_WRITE_UNCORRECTABLE      = 1 << 1,
 244         NVME_CTRL_ONCS_DSM                      = 1 << 2,
 245         NVME_CTRL_ONCS_WRITE_ZEROES             = 1 << 3,
 246         NVME_CTRL_VWC_PRESENT                   = 1 << 0,
 247         NVME_CTRL_OACS_SEC_SUPP                 = 1 << 0,
 248         NVME_CTRL_OACS_DBBUF_SUPP               = 1 << 7,
 249 };
 250
 251 struct nvme_lbaf {
 252         __le16                  ms;
 253         __u8                    ds;
 254         __u8                    rp;
 255 };
 256
 257 struct nvme_id_ns {
 258         __le64                  nsze;
 259         __le64                  ncap;
 260         __le64                  nuse;
 261         __u8                    nsfeat;
 262         __u8                    nlbaf;
 263         __u8                    flbas;
 264         __u8                    mc;
 265         __u8                    dpc;
 266         __u8                    dps;
 267         __u8                    nmic;
 268         __u8                    rescap;
 269         __u8                    fpi;
 270         __u8                    rsvd33;
 271         __le16                  nawun;
 272         __le16                  nawupf;
 273         __le16                  nacwu;
 274         __le16                  nabsn;
 275         __le16                  nabo;
 276         __le16                  nabspf;
 277         __u16                   rsvd46;
 278         __u8                    nvmcap[16];
 279         __u8                    rsvd64[40];
 280         __u8                    nguid[16];
 281         __u8                    eui64[8];
 282         struct nvme_lbaf        lbaf[16];
 283         __u8                    rsvd192[192];
 284         __u8                    vs[3712];
 285 };
 286
 287 enum {
 288         NVME_ID_CNS_NS                  = 0x00,
 289         NVME_ID_CNS_CTRL                = 0x01,
 290         NVME_ID_CNS_NS_ACTIVE_LIST      = 0x02,
 291         NVME_ID_CNS_NS_PRESENT_LIST     = 0x10,
 292         NVME_ID_CNS_NS_PRESENT          = 0x11,
 293         NVME_ID_CNS_CTRL_NS_LIST        = 0x12,
 294         NVME_ID_CNS_CTRL_LIST           = 0x13,
 295 };
 296
 297 enum {
 298         NVME_NS_FEAT_THIN       = 1 << 0,
 299         NVME_NS_FLBAS_LBA_MASK  = 0xf,
 300         NVME_NS_FLBAS_META_EXT  = 0x10,
 301         NVME_LBAF_RP_BEST       = 0,
 302         NVME_LBAF_RP_BETTER     = 1,
 303         NVME_LBAF_RP_GOOD       = 2,
 304         NVME_LBAF_RP_DEGRADED   = 3,
 305         NVME_NS_DPC_PI_LAST     = 1 << 4,
 306         NVME_NS_DPC_PI_FIRST    = 1 << 3,
 307         NVME_NS_DPC_PI_TYPE3    = 1 << 2,
 308         NVME_NS_DPC_PI_TYPE2    = 1 << 1,
 309         NVME_NS_DPC_PI_TYPE1    = 1 << 0,
 310         NVME_NS_DPS_PI_FIRST    = 1 << 3,
 311         NVME_NS_DPS_PI_MASK     = 0x7,
 312         NVME_NS_DPS_PI_TYPE1    = 1,
 313         NVME_NS_DPS_PI_TYPE2    = 2,
 314         NVME_NS_DPS_PI_TYPE3    = 3,
 315 };
 316
 317 struct nvme_smart_log {
 318         __u8                    critical_warning;
 319         __u8                    temperature[2];
 320         __u8                    avail_spare;
 321         __u8                    spare_thresh;
 322         __u8                    percent_used;
 323         __u8                    rsvd6[26];
 324         __u8                    data_units_read[16];
 325         __u8                    data_units_written[16];
 326         __u8                    host_reads[16];
 327         __u8                    host_writes[16];
 328         __u8                    ctrl_busy_time[16];
 329         __u8                    power_cycles[16];
 330         __u8                    power_on_hours[16];
 331         __u8                    unsafe_shutdowns[16];
 332         __u8                    media_errors[16];
 333         __u8                    num_err_log_entries[16];
 334         __le32                  warning_temp_time;
 335         __le32                  critical_comp_time;
 336         __le16                  temp_sensor[8];
 337         __u8                    rsvd216[296];
 338 };
 339
 340 enum {
 341         NVME_SMART_CRIT_SPARE           = 1 << 0,
 342         NVME_SMART_CRIT_TEMPERATURE     = 1 << 1,
 343         NVME_SMART_CRIT_RELIABILITY     = 1 << 2,
 344         NVME_SMART_CRIT_MEDIA           = 1 << 3,
 345         NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
 346 };
 347
 348 enum {
 349         NVME_AER_NOTICE_NS_CHANGED      = 0x0002,
 350 };
 351
 352 struct nvme_lba_range_type {
 353         __u8                    type;
 354         __u8                    attributes;
 355         __u8                    rsvd2[14];
 356         __u64                   slba;
 357         __u64                   nlb;
 358         __u8                    guid[16];
 359         __u8                    rsvd48[16];
 360 };
 361
 362 enum {
 363         NVME_LBART_TYPE_FS      = 0x01,
 364         NVME_LBART_TYPE_RAID    = 0x02,
 365         NVME_LBART_TYPE_CACHE   = 0x03,
 366         NVME_LBART_TYPE_SWAP    = 0x04,
 367
 368         NVME_LBART_ATTRIB_TEMP  = 1 << 0,
 369         NVME_LBART_ATTRIB_HIDE  = 1 << 1,
 370 };
 371
 372 struct nvme_reservation_status {
 373         __le32  gen;
 374         __u8    rtype;
 375         __u8    regctl[2];
 376         __u8    resv5[2];
 377         __u8    ptpls;
 378         __u8    resv10[13];
 379         struct {
 380                 __le16  cntlid;
 381                 __u8    rcsts;
 382                 __u8    resv3[5];
 383                 __le64  hostid;
 384                 __le64  rkey;
 385         } regctl_ds[];
 386 };
 387
 388 enum nvme_async_event_type {
 389         NVME_AER_TYPE_ERROR     = 0,
 390         NVME_AER_TYPE_SMART     = 1,
 391         NVME_AER_TYPE_NOTICE    = 2,
 392 };
 393
 394 /* I/O commands */
 395
 396 enum nvme_opcode {
 397         nvme_cmd_flush          = 0x00,
 398         nvme_cmd_write          = 0x01,
 399         nvme_cmd_read           = 0x02,
 400         nvme_cmd_write_uncor    = 0x04,
 401         nvme_cmd_compare        = 0x05,
 402         nvme_cmd_write_zeroes   = 0x08,
 403         nvme_cmd_dsm            = 0x09,
 404         nvme_cmd_resv_register  = 0x0d,
 405         nvme_cmd_resv_report    = 0x0e,
 406         nvme_cmd_resv_acquire   = 0x11,
 407         nvme_cmd_resv_release   = 0x15,
 408 };
 409
 410 /*
 411  * Descriptor subtype - lower 4 bits of nvme_(keyed_)sgl_desc identifier
 412  *
 413  * @NVME_SGL_FMT_ADDRESS:     absolute address of the data block
 414  * @NVME_SGL_FMT_OFFSET:      relative offset of the in-capsule data block
 415  * @NVME_SGL_FMT_INVALIDATE:  RDMA transport specific remote invalidation
 416  *                            request subtype
 417  */
 418 enum {
 419         NVME_SGL_FMT_ADDRESS            = 0x00,
 420         NVME_SGL_FMT_OFFSET             = 0x01,
 421         NVME_SGL_FMT_INVALIDATE         = 0x0f,
 422 };
 423
 424 /*
 425  * Descriptor type - upper 4 bits of nvme_(keyed_)sgl_desc identifier
 426  *
 427  * For struct nvme_sgl_desc:
 428  *   @NVME_SGL_FMT_DATA_DESC:           data block descriptor
 429  *   @NVME_SGL_FMT_SEG_DESC:            sgl segment descriptor
 430  *   @NVME_SGL_FMT_LAST_SEG_DESC:       last sgl segment descriptor
 431  *
 432  * For struct nvme_keyed_sgl_desc:
 433  *   @NVME_KEY_SGL_FMT_DATA_DESC:       keyed data block descriptor
 434  */
 435 enum {
 436         NVME_SGL_FMT_DATA_DESC          = 0x00,
 437         NVME_SGL_FMT_SEG_DESC           = 0x02,
 438         NVME_SGL_FMT_LAST_SEG_DESC      = 0x03,
 439         NVME_KEY_SGL_FMT_DATA_DESC      = 0x04,
 440 };
 441
 442 struct nvme_sgl_desc {
 443         __le64  addr;
 444         __le32  length;
 445         __u8    rsvd[3];
 446         __u8    type;
 447 };
 448
 449 struct nvme_keyed_sgl_desc {
 450         __le64  addr;
 451         __u8    length[3];
 452         __u8    key[4];
 453         __u8    type;
 454 };
 455
 456 union nvme_data_ptr {
 457         struct {
 458                 __le64  prp1;
 459                 __le64  prp2;
 460         };
 461         struct nvme_sgl_desc    sgl;
 462         struct nvme_keyed_sgl_desc ksgl;
 463 };
 464
 465 /*
 466  * Lowest two bits of our flags field (FUSE field in the spec):
 467  *
 468  * @NVME_CMD_FUSE_FIRST:   Fused Operation, first command
 469  * @NVME_CMD_FUSE_SECOND:  Fused Operation, second command
 470  *
 471  * Highest two bits in our flags field (PSDT field in the spec):
 472  *
 473  * @NVME_CMD_PSDT_SGL_METABUF:  Use SGLS for this transfer,
 474  *      If used, MPTR contains addr of single physical buffer (byte aligned).
 475  * @NVME_CMD_PSDT_SGL_METASEG:  Use SGLS for this transfer,
 476  *      If used, MPTR contains an address of an SGL segment containing
 477  *      exactly 1 SGL descriptor (qword aligned).
 478  */
 479 enum {
 480         NVME_CMD_FUSE_FIRST     = (1 << 0),
 481         NVME_CMD_FUSE_SECOND    = (1 << 1),
 482
 483         NVME_CMD_SGL_METABUF    = (1 << 6),
 484         NVME_CMD_SGL_METASEG    = (1 << 7),
 485         NVME_CMD_SGL_ALL        = NVME_CMD_SGL_METABUF | NVME_CMD_SGL_METASEG,
 486 };
 487
 488 struct nvme_common_command {
 489         __u8                    opcode;
 490         __u8                    flags;
 491         __u16                   command_id;
 492         __le32                  nsid;
 493         __le32                  cdw2[2];
 494         __le64                  metadata;
 495         union nvme_data_ptr     dptr;
 496         __le32                  cdw10[6];
 497 };
 498
 499 struct nvme_rw_command {
 500         __u8                    opcode;
 501         __u8                    flags;
 502         __u16                   command_id;
 503         __le32                  nsid;
 504         __u64                   rsvd2;
 505         __le64                  metadata;
 506         union nvme_data_ptr     dptr;
 507         __le64                  slba;
 508         __le16                  length;
 509         __le16                  control;
 510         __le32                  dsmgmt;
 511         __le32                  reftag;
 512         __le16                  apptag;
 513         __le16                  appmask;
 514 };
 515
 516 enum {
 517         NVME_RW_LR                      = 1 << 15,
 518         NVME_RW_FUA                     = 1 << 14,
 519         NVME_RW_DSM_FREQ_UNSPEC         = 0,
 520         NVME_RW_DSM_FREQ_TYPICAL        = 1,
 521         NVME_RW_DSM_FREQ_RARE           = 2,
 522         NVME_RW_DSM_FREQ_READS          = 3,
 523         NVME_RW_DSM_FREQ_WRITES         = 4,
 524         NVME_RW_DSM_FREQ_RW             = 5,
 525         NVME_RW_DSM_FREQ_ONCE           = 6,
 526         NVME_RW_DSM_FREQ_PREFETCH       = 7,
 527         NVME_RW_DSM_FREQ_TEMP           = 8,
 528         NVME_RW_DSM_LATENCY_NONE        = 0 << 4,
 529         NVME_RW_DSM_LATENCY_IDLE        = 1 << 4,
 530         NVME_RW_DSM_LATENCY_NORM        = 2 << 4,
 531         NVME_RW_DSM_LATENCY_LOW         = 3 << 4,
 532         NVME_RW_DSM_SEQ_REQ             = 1 << 6,
 533         NVME_RW_DSM_COMPRESSED          = 1 << 7,
 534         NVME_RW_PRINFO_PRCHK_REF        = 1 << 10,
 535         NVME_RW_PRINFO_PRCHK_APP        = 1 << 11,
 536         NVME_RW_PRINFO_PRCHK_GUARD      = 1 << 12,
 537         NVME_RW_PRINFO_PRACT            = 1 << 13,
 538 };
 539
 540 struct nvme_dsm_cmd {
 541         __u8                    opcode;
 542         __u8                    flags;
 543         __u16                   command_id;
 544         __le32                  nsid;
 545         __u64                   rsvd2[2];
 546         union nvme_data_ptr     dptr;
 547         __le32                  nr;
 548         __le32                  attributes;
 549         __u32                   rsvd12[4];
 550 };
 551
 552 enum {
 553         NVME_DSMGMT_IDR         = 1 << 0,
 554         NVME_DSMGMT_IDW         = 1 << 1,
 555         NVME_DSMGMT_AD          = 1 << 2,
 556 };
 557
 558 #define NVME_DSM_MAX_RANGES     256
 559
 560 struct nvme_dsm_range {
 561         __le32                  cattr;
 562         __le32                  nlb;
 563         __le64                  slba;
 564 };
 565
 566 struct nvme_write_zeroes_cmd {
 567         __u8                    opcode;
 568         __u8                    flags;
 569         __u16                   command_id;
 570         __le32                  nsid;
 571         __u64                   rsvd2;
 572         __le64                  metadata;
 573         union nvme_data_ptr     dptr;
 574         __le64                  slba;
 575         __le16                  length;
 576         __le16                  control;
 577         __le32                  dsmgmt;
 578         __le32                  reftag;
 579         __le16                  apptag;
 580         __le16                  appmask;
 581 };
 582
 583 /* Features */
 584
 585 struct nvme_feat_auto_pst {
 586         __le64 entries[32];
 587 };
 588
 589 /* Admin commands */
 590
 591 enum nvme_admin_opcode {
 592         nvme_admin_delete_sq            = 0x00,
 593         nvme_admin_create_sq            = 0x01,
 594         nvme_admin_get_log_page         = 0x02,
 595         nvme_admin_delete_cq            = 0x04,
 596         nvme_admin_create_cq            = 0x05,
 597         nvme_admin_identify             = 0x06,
 598         nvme_admin_abort_cmd            = 0x08,
 599         nvme_admin_set_features         = 0x09,
 600         nvme_admin_get_features         = 0x0a,
 601         nvme_admin_async_event          = 0x0c,
 602         nvme_admin_ns_mgmt              = 0x0d,
 603         nvme_admin_activate_fw          = 0x10,
 604         nvme_admin_download_fw          = 0x11,
 605         nvme_admin_ns_attach            = 0x15,
 606         nvme_admin_keep_alive           = 0x18,
 607         nvme_admin_dbbuf                = 0x7C,
 608         nvme_admin_format_nvm           = 0x80,
 609         nvme_admin_security_send        = 0x81,
 610         nvme_admin_security_recv        = 0x82,
 611 };
 612
 613 enum {
 614         NVME_QUEUE_PHYS_CONTIG  = (1 << 0),
 615         NVME_CQ_IRQ_ENABLED     = (1 << 1),
 616         NVME_SQ_PRIO_URGENT     = (0 << 1),
 617         NVME_SQ_PRIO_HIGH       = (1 << 1),
 618         NVME_SQ_PRIO_MEDIUM     = (2 << 1),
 619         NVME_SQ_PRIO_LOW        = (3 << 1),
 620         NVME_FEAT_ARBITRATION   = 0x01,
 621         NVME_FEAT_POWER_MGMT    = 0x02,
 622         NVME_FEAT_LBA_RANGE     = 0x03,
 623         NVME_FEAT_TEMP_THRESH   = 0x04,
 624         NVME_FEAT_ERR_RECOVERY  = 0x05,
 625         NVME_FEAT_VOLATILE_WC   = 0x06,
 626         NVME_FEAT_NUM_QUEUES    = 0x07,
 627         NVME_FEAT_IRQ_COALESCE  = 0x08,
 628         NVME_FEAT_IRQ_CONFIG    = 0x09,
 629         NVME_FEAT_WRITE_ATOMIC  = 0x0a,
 630         NVME_FEAT_ASYNC_EVENT   = 0x0b,
 631         NVME_FEAT_AUTO_PST      = 0x0c,
 632         NVME_FEAT_HOST_MEM_BUF  = 0x0d,
 633         NVME_FEAT_KATO          = 0x0f,
 634         NVME_FEAT_SW_PROGRESS   = 0x80,
 635         NVME_FEAT_HOST_ID       = 0x81,
 636         NVME_FEAT_RESV_MASK     = 0x82,
 637         NVME_FEAT_RESV_PERSIST  = 0x83,
 638         NVME_LOG_ERROR          = 0x01,
 639         NVME_LOG_SMART          = 0x02,
 640         NVME_LOG_FW_SLOT        = 0x03,
 641         NVME_LOG_DISC           = 0x70,
 642         NVME_LOG_RESERVATION    = 0x80,
 643         NVME_FWACT_REPL         = (0 << 3),
 644         NVME_FWACT_REPL_ACTV    = (1 << 3),
 645         NVME_FWACT_ACTV         = (2 << 3),
 646 };
 647
 648 struct nvme_identify {
 649         __u8                    opcode;
 650         __u8                    flags;
 651         __u16                   command_id;
 652         __le32                  nsid;
 653         __u64                   rsvd2[2];
 654         union nvme_data_ptr     dptr;
 655         __u8                    cns;
 656         __u8                    rsvd3;
 657         __le16                  ctrlid;
 658         __u32                   rsvd11[5];
 659 };
 660
 661 struct nvme_features {
 662         __u8                    opcode;
 663         __u8                    flags;
 664         __u16                   command_id;
 665         __le32                  nsid;
 666         __u64                   rsvd2[2];
 667         union nvme_data_ptr     dptr;
 668         __le32                  fid;
 669         __le32                  dword11;
 670         __u32                   rsvd12[4];
 671 };
 672
 673 struct nvme_create_cq {
 674         __u8                    opcode;
 675         __u8                    flags;
 676         __u16                   command_id;
 677         __u32                   rsvd1[5];
 678         __le64                  prp1;
 679         __u64                   rsvd8;
 680         __le16                  cqid;
 681         __le16                  qsize;
 682         __le16                  cq_flags;
 683         __le16                  irq_vector;
 684         __u32                   rsvd12[4];
 685 };
 686
 687 struct nvme_create_sq {
 688         __u8                    opcode;
 689         __u8                    flags;
 690         __u16                   command_id;
 691         __u32                   rsvd1[5];
 692         __le64                  prp1;
 693         __u64                   rsvd8;
 694         __le16                  sqid;
 695         __le16                  qsize;
 696         __le16                  sq_flags;
 697         __le16                  cqid;
 698         __u32                   rsvd12[4];
 699 };
 700
 701 struct nvme_delete_queue {
 702         __u8                    opcode;
 703         __u8                    flags;
 704         __u16                   command_id;
 705         __u32                   rsvd1[9];
 706         __le16                  qid;
 707         __u16                   rsvd10;
 708         __u32                   rsvd11[5];
 709 };
 710
 711 struct nvme_abort_cmd {
 712         __u8                    opcode;
 713         __u8                    flags;
 714         __u16                   command_id;
 715         __u32                   rsvd1[9];
 716         __le16                  sqid;
 717         __u16                   cid;
 718         __u32                   rsvd11[5];
 719 };
 720
 721 struct nvme_download_firmware {
 722         __u8                    opcode;
 723         __u8                    flags;
 724         __u16                   command_id;
 725         __u32                   rsvd1[5];
 726         union nvme_data_ptr     dptr;
 727         __le32                  numd;
 728         __le32                  offset;
 729         __u32                   rsvd12[4];
 730 };
 731
 732 struct nvme_format_cmd {
 733         __u8                    opcode;
 734         __u8                    flags;
 735         __u16                   command_id;
 736         __le32                  nsid;
 737         __u64                   rsvd2[4];
 738         __le32                  cdw10;
 739         __u32                   rsvd11[5];
 740 };
 741
 742 struct nvme_get_log_page_command {
 743         __u8                    opcode;
 744         __u8                    flags;
 745         __u16                   command_id;
 746         __le32                  nsid;
 747         __u64                   rsvd2[2];
 748         union nvme_data_ptr     dptr;
 749         __u8                    lid;
 750         __u8                    rsvd10;
 751         __le16                  numdl;
 752         __le16                  numdu;
 753         __u16                   rsvd11;
 754         __le32                  lpol;
 755         __le32                  lpou;
 756         __u32                   rsvd14[2];
 757 };
 758
 759 /*
 760  * Fabrics subcommands.
 761  */
 762 enum nvmf_fabrics_opcode {
 763         nvme_fabrics_command            = 0x7f,
 764 };
 765
 766 enum nvmf_capsule_command {
 767         nvme_fabrics_type_property_set  = 0x00,
 768         nvme_fabrics_type_connect       = 0x01,
 769         nvme_fabrics_type_property_get  = 0x04,
 770 };
 771
 772 struct nvmf_common_command {
 773         __u8    opcode;
 774         __u8    resv1;
 775         __u16   command_id;
 776         __u8    fctype;
 777         __u8    resv2[35];
 778         __u8    ts[24];
 779 };
 780
 781 /*
 782  * The legal cntlid range a NVMe Target will provide.
 783  * Note that cntlid of value 0 is considered illegal in the fabrics world.
 784  * Devices based on earlier specs did not have the subsystem concept;
 785  * therefore, those devices had their cntlid value set to 0 as a result.
 786  */
 787 #define NVME_CNTLID_MIN         1
 788 #define NVME_CNTLID_MAX         0xffef
 789 #define NVME_CNTLID_DYNAMIC     0xffff
 790
 791 #define MAX_DISC_LOGS   255
 792
 793 /* Discovery log page entry */
 794 struct nvmf_disc_rsp_page_entry {
 795         __u8            trtype;
 796         __u8            adrfam;
 797         __u8            subtype;
 798         __u8            treq;
 799         __le16          portid;
 800         __le16          cntlid;
 801         __le16          asqsz;
 802         __u8            resv8[22];
 803         char            trsvcid[NVMF_TRSVCID_SIZE];
 804         __u8            resv64[192];
 805         char            subnqn[NVMF_NQN_FIELD_LEN];
 806         char            traddr[NVMF_TRADDR_SIZE];
 807         union tsas {
 808                 char            common[NVMF_TSAS_SIZE];
 809                 struct rdma {
 810                         __u8    qptype;
 811                         __u8    prtype;
 812                         __u8    cms;
 813                         __u8    resv3[5];
 814                         __u16   pkey;
 815                         __u8    resv10[246];
 816                 } rdma;
 817         } tsas;
 818 };
 819
 820 /* Discovery log page header */
 821 struct nvmf_disc_rsp_page_hdr {
 822         __le64          genctr;
 823         __le64          numrec;
 824         __le16          recfmt;
 825         __u8            resv14[1006];
 826         struct nvmf_disc_rsp_page_entry entries[0];
 827 };
 828
 829 struct nvmf_connect_command {
 830         __u8            opcode;
 831         __u8            resv1;
 832         __u16           command_id;
 833         __u8            fctype;
 834         __u8            resv2[19];
 835         union nvme_data_ptr dptr;
 836         __le16          recfmt;
 837         __le16          qid;
 838         __le16          sqsize;
 839         __u8            cattr;
 840         __u8            resv3;
 841         __le32          kato;
 842         __u8            resv4[12];
 843 };
 844
 845 struct nvmf_connect_data {
 846         __u8            hostid[16];
 847         __le16          cntlid;
 848         char            resv4[238];
 849         char            subsysnqn[NVMF_NQN_FIELD_LEN];
 850         char            hostnqn[NVMF_NQN_FIELD_LEN];
 851         char            resv5[256];
 852 };
 853
 854 struct nvmf_property_set_command {
 855         __u8            opcode;
 856         __u8            resv1;
 857         __u16           command_id;
 858         __u8            fctype;
 859         __u8            resv2[35];
 860         __u8            attrib;
 861         __u8            resv3[3];
 862         __le32          offset;
 863         __le64          value;
 864         __u8            resv4[8];
 865 };
 866
 867 struct nvmf_property_get_command {
 868         __u8            opcode;
 869         __u8            resv1;
 870         __u16           command_id;
 871         __u8            fctype;
 872         __u8            resv2[35];
 873         __u8            attrib;
 874         __u8            resv3[3];
 875         __le32          offset;
 876         __u8            resv4[16];
 877 };
 878
 879 struct nvme_dbbuf {
 880         __u8                    opcode;
 881         __u8                    flags;
 882         __u16                   command_id;
 883         __u32                   rsvd1[5];
 884         __le64                  prp1;
 885         __le64                  prp2;
 886         __u32                   rsvd12[6];
 887 };
 888
 889 struct nvme_command {
 890         union {
 891                 struct nvme_common_command common;
 892                 struct nvme_rw_command rw;
 893                 struct nvme_identify identify;
 894                 struct nvme_features features;
 895                 struct nvme_create_cq create_cq;
 896                 struct nvme_create_sq create_sq;
 897                 struct nvme_delete_queue delete_queue;
 898                 struct nvme_download_firmware dlfw;
 899                 struct nvme_format_cmd format;
 900                 struct nvme_dsm_cmd dsm;
 901                 struct nvme_write_zeroes_cmd write_zeroes;
 902                 struct nvme_abort_cmd abort;
 903                 struct nvme_get_log_page_command get_log_page;
 904                 struct nvmf_common_command fabrics;
 905                 struct nvmf_connect_command connect;
 906                 struct nvmf_property_set_command prop_set;
 907                 struct nvmf_property_get_command prop_get;
 908                 struct nvme_dbbuf dbbuf;
 909         };
 910 };
 911
 912 static inline bool nvme_is_write(struct nvme_command *cmd)
 913 {
 914         /*
 915          * What a mess...
 916          *
 917          * Why can't we simply have a Fabrics In and Fabrics out command?
 918          */
 919         if (unlikely(cmd->common.opcode == nvme_fabrics_command))
 920                 return cmd->fabrics.opcode & 1;
 921         return cmd->common.opcode & 1;
 922 }
 923
 924 enum {
 925         /*
 926          * Generic Command Status:
 927          */
 928         NVME_SC_SUCCESS                 = 0x0,
 929         NVME_SC_INVALID_OPCODE          = 0x1,
 930         NVME_SC_INVALID_FIELD           = 0x2,
 931         NVME_SC_CMDID_CONFLICT          = 0x3,
 932         NVME_SC_DATA_XFER_ERROR         = 0x4,
 933         NVME_SC_POWER_LOSS              = 0x5,
 934         NVME_SC_INTERNAL                = 0x6,
 935         NVME_SC_ABORT_REQ               = 0x7,
 936         NVME_SC_ABORT_QUEUE             = 0x8,
 937         NVME_SC_FUSED_FAIL              = 0x9,
 938         NVME_SC_FUSED_MISSING           = 0xa,
 939         NVME_SC_INVALID_NS              = 0xb,
 940         NVME_SC_CMD_SEQ_ERROR           = 0xc,
 941         NVME_SC_SGL_INVALID_LAST        = 0xd,
 942         NVME_SC_SGL_INVALID_COUNT       = 0xe,
 943         NVME_SC_SGL_INVALID_DATA        = 0xf,
 944         NVME_SC_SGL_INVALID_METADATA    = 0x10,
 945         NVME_SC_SGL_INVALID_TYPE        = 0x11,
 946
 947         NVME_SC_SGL_INVALID_OFFSET      = 0x16,
 948         NVME_SC_SGL_INVALID_SUBTYPE     = 0x17,
 949
 950         NVME_SC_LBA_RANGE               = 0x80,
 951         NVME_SC_CAP_EXCEEDED            = 0x81,
 952         NVME_SC_NS_NOT_READY            = 0x82,
 953         NVME_SC_RESERVATION_CONFLICT    = 0x83,
 954
 955         /*
 956          * Command Specific Status:
 957          */
 958         NVME_SC_CQ_INVALID              = 0x100,
 959         NVME_SC_QID_INVALID             = 0x101,
 960         NVME_SC_QUEUE_SIZE              = 0x102,
 961         NVME_SC_ABORT_LIMIT             = 0x103,
 962         NVME_SC_ABORT_MISSING           = 0x104,
 963         NVME_SC_ASYNC_LIMIT             = 0x105,
 964         NVME_SC_FIRMWARE_SLOT           = 0x106,
 965         NVME_SC_FIRMWARE_IMAGE          = 0x107,
 966         NVME_SC_INVALID_VECTOR          = 0x108,
 967         NVME_SC_INVALID_LOG_PAGE        = 0x109,
 968         NVME_SC_INVALID_FORMAT          = 0x10a,
 969         NVME_SC_FW_NEEDS_CONV_RESET     = 0x10b,
 970         NVME_SC_INVALID_QUEUE           = 0x10c,
 971         NVME_SC_FEATURE_NOT_SAVEABLE    = 0x10d,
 972         NVME_SC_FEATURE_NOT_CHANGEABLE  = 0x10e,
 973         NVME_SC_FEATURE_NOT_PER_NS      = 0x10f,
 974         NVME_SC_FW_NEEDS_SUBSYS_RESET   = 0x110,
 975         NVME_SC_FW_NEEDS_RESET          = 0x111,
 976         NVME_SC_FW_NEEDS_MAX_TIME       = 0x112,
 977         NVME_SC_FW_ACIVATE_PROHIBITED   = 0x113,
 978         NVME_SC_OVERLAPPING_RANGE       = 0x114,
 979         NVME_SC_NS_INSUFFICENT_CAP      = 0x115,
 980         NVME_SC_NS_ID_UNAVAILABLE       = 0x116,
 981         NVME_SC_NS_ALREADY_ATTACHED     = 0x118,
 982         NVME_SC_NS_IS_PRIVATE           = 0x119,
 983         NVME_SC_NS_NOT_ATTACHED         = 0x11a,
 984         NVME_SC_THIN_PROV_NOT_SUPP      = 0x11b,
 985         NVME_SC_CTRL_LIST_INVALID       = 0x11c,
 986
 987         /*
 988          * I/O Command Set Specific - NVM commands:
 989          */
 990         NVME_SC_BAD_ATTRIBUTES          = 0x180,
 991         NVME_SC_INVALID_PI              = 0x181,
 992         NVME_SC_READ_ONLY               = 0x182,
 993         NVME_SC_ONCS_NOT_SUPPORTED      = 0x183,
 994
 995         /*
 996          * I/O Command Set Specific - Fabrics commands:
 997          */
 998         NVME_SC_CONNECT_FORMAT          = 0x180,
 999         NVME_SC_CONNECT_CTRL_BUSY       = 0x181,
1000         NVME_SC_CONNECT_INVALID_PARAM   = 0x182,
1001         NVME_SC_CONNECT_RESTART_DISC    = 0x183,
1002         NVME_SC_CONNECT_INVALID_HOST    = 0x184,
1003
1004         NVME_SC_DISCOVERY_RESTART       = 0x190,
1005         NVME_SC_AUTH_REQUIRED           = 0x191,
1006
1007         /*
1008          * Media and Data Integrity Errors:
1009          */
1010         NVME_SC_WRITE_FAULT             = 0x280,
1011         NVME_SC_READ_ERROR              = 0x281,
1012         NVME_SC_GUARD_CHECK             = 0x282,
1013         NVME_SC_APPTAG_CHECK            = 0x283,
1014         NVME_SC_REFTAG_CHECK            = 0x284,
1015         NVME_SC_COMPARE_FAILED          = 0x285,
1016         NVME_SC_ACCESS_DENIED           = 0x286,
1017         NVME_SC_UNWRITTEN_BLOCK         = 0x287,
1018
1019         NVME_SC_DNR                     = 0x4000,
1020
1021
1022         /*
1023          * FC Transport-specific error status values for NVME commands
1024          *
1025          * Transport-specific status code values must be in the range 0xB0..0xBF
1026          */
1027
1028         /* Generic FC failure - catchall */
1029         NVME_SC_FC_TRANSPORT_ERROR      = 0x00B0,
1030
1031         /* I/O failure due to FC ABTS'd */
1032         NVME_SC_FC_TRANSPORT_ABORTED    = 0x00B1,
1033 };
1034
1035 struct nvme_completion {
1036         /*
1037          * Used by Admin and Fabrics commands to return data:
1038          */
1039         union nvme_result {
1040                 __le16  u16;
1041                 __le32  u32;
1042                 __le64  u64;
1043         } result;
1044         __le16  sq_head;        /* how much of this queue may be reclaimed */
1045         __le16  sq_id;          /* submission queue that generated this entry */
1046         __u16   command_id;     /* of the command which completed */
1047         __le16  status;         /* did the command fail, and if so, why? */
1048 };
1049
1050 #define NVME_VS(major, minor, tertiary) \
1051         (((major) << 16) | ((minor) << 8) | (tertiary))
1052
1053 #endif /* _LINUX_NVME_H */