drivers/block/nvme-scsi.c

   1 /*
   2  * NVM Express device driver
   3  * Copyright (c) 2011, 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  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 /*
  20  * Refer to the SCSI-NVMe Translation spec for details on how
  21  * each command is translated.
  22  */
  23
  24 #include <linux/nvme.h>
  25 #include <linux/bio.h>
  26 #include <linux/bitops.h>
  27 #include <linux/blkdev.h>
  28 #include <linux/compat.h>
  29 #include <linux/delay.h>
  30 #include <linux/errno.h>
  31 #include <linux/fs.h>
  32 #include <linux/genhd.h>
  33 #include <linux/idr.h>
  34 #include <linux/init.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/io.h>
  37 #include <linux/kdev_t.h>
  38 #include <linux/kthread.h>
  39 #include <linux/kernel.h>
  40 #include <linux/mm.h>
  41 #include <linux/module.h>
  42 #include <linux/moduleparam.h>
  43 #include <linux/pci.h>
  44 #include <linux/poison.h>
  45 #include <linux/sched.h>
  46 #include <linux/slab.h>
  47 #include <linux/types.h>
  48 #include <scsi/sg.h>
  49 #include <scsi/scsi.h>
  50
  51
  52 static int sg_version_num = 30534;      /* 2 digits for each component */
  53
  54 #define SNTI_TRANSLATION_SUCCESS                        0
  55 #define SNTI_INTERNAL_ERROR                             1
  56
  57 /* VPD Page Codes */
  58 #define VPD_SUPPORTED_PAGES                             0x00
  59 #define VPD_SERIAL_NUMBER                               0x80
  60 #define VPD_DEVICE_IDENTIFIERS                          0x83
  61 #define VPD_EXTENDED_INQUIRY                            0x86
  62 #define VPD_BLOCK_DEV_CHARACTERISTICS                   0xB1
  63
  64 /* CDB offsets */
  65 #define REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET             6
  66 #define REPORT_LUNS_SR_OFFSET                           2
  67 #define READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET             10
  68 #define REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET           4
  69 #define REQUEST_SENSE_DESC_OFFSET                       1
  70 #define REQUEST_SENSE_DESC_MASK                         0x01
  71 #define DESCRIPTOR_FORMAT_SENSE_DATA_TYPE               1
  72 #define INQUIRY_EVPD_BYTE_OFFSET                        1
  73 #define INQUIRY_PAGE_CODE_BYTE_OFFSET                   2
  74 #define INQUIRY_EVPD_BIT_MASK                           1
  75 #define INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET            3
  76 #define START_STOP_UNIT_CDB_IMMED_OFFSET                1
  77 #define START_STOP_UNIT_CDB_IMMED_MASK                  0x1
  78 #define START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET       3
  79 #define START_STOP_UNIT_CDB_POWER_COND_MOD_MASK         0xF
  80 #define START_STOP_UNIT_CDB_POWER_COND_OFFSET           4
  81 #define START_STOP_UNIT_CDB_POWER_COND_MASK             0xF0
  82 #define START_STOP_UNIT_CDB_NO_FLUSH_OFFSET             4
  83 #define START_STOP_UNIT_CDB_NO_FLUSH_MASK               0x4
  84 #define START_STOP_UNIT_CDB_START_OFFSET                4
  85 #define START_STOP_UNIT_CDB_START_MASK                  0x1
  86 #define WRITE_BUFFER_CDB_MODE_OFFSET                    1
  87 #define WRITE_BUFFER_CDB_MODE_MASK                      0x1F
  88 #define WRITE_BUFFER_CDB_BUFFER_ID_OFFSET               2
  89 #define WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET           3
  90 #define WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET        6
  91 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET         1
  92 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK           0xC0
  93 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT          6
  94 #define FORMAT_UNIT_CDB_LONG_LIST_OFFSET                1
  95 #define FORMAT_UNIT_CDB_LONG_LIST_MASK                  0x20
  96 #define FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET              1
  97 #define FORMAT_UNIT_CDB_FORMAT_DATA_MASK                0x10
  98 #define FORMAT_UNIT_SHORT_PARM_LIST_LEN                 4
  99 #define FORMAT_UNIT_LONG_PARM_LIST_LEN                  8
 100 #define FORMAT_UNIT_PROT_INT_OFFSET                     3
 101 #define FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET             0
 102 #define FORMAT_UNIT_PROT_FIELD_USAGE_MASK               0x07
 103 #define UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET              7
 104
 105 /* Misc. defines */
 106 #define NIBBLE_SHIFT                                    4
 107 #define FIXED_SENSE_DATA                                0x70
 108 #define DESC_FORMAT_SENSE_DATA                          0x72
 109 #define FIXED_SENSE_DATA_ADD_LENGTH                     10
 110 #define LUN_ENTRY_SIZE                                  8
 111 #define LUN_DATA_HEADER_SIZE                            8
 112 #define ALL_LUNS_RETURNED                               0x02
 113 #define ALL_WELL_KNOWN_LUNS_RETURNED                    0x01
 114 #define RESTRICTED_LUNS_RETURNED                        0x00
 115 #define NVME_POWER_STATE_START_VALID                    0x00
 116 #define NVME_POWER_STATE_ACTIVE                         0x01
 117 #define NVME_POWER_STATE_IDLE                           0x02
 118 #define NVME_POWER_STATE_STANDBY                        0x03
 119 #define NVME_POWER_STATE_LU_CONTROL                     0x07
 120 #define POWER_STATE_0                                   0
 121 #define POWER_STATE_1                                   1
 122 #define POWER_STATE_2                                   2
 123 #define POWER_STATE_3                                   3
 124 #define DOWNLOAD_SAVE_ACTIVATE                          0x05
 125 #define DOWNLOAD_SAVE_DEFER_ACTIVATE                    0x0E
 126 #define ACTIVATE_DEFERRED_MICROCODE                     0x0F
 127 #define FORMAT_UNIT_IMMED_MASK                          0x2
 128 #define FORMAT_UNIT_IMMED_OFFSET                        1
 129 #define KELVIN_TEMP_FACTOR                              273
 130 #define FIXED_FMT_SENSE_DATA_SIZE                       18
 131 #define DESC_FMT_SENSE_DATA_SIZE                        8
 132
 133 /* SCSI/NVMe defines and bit masks */
 134 #define INQ_STANDARD_INQUIRY_PAGE                       0x00
 135 #define INQ_SUPPORTED_VPD_PAGES_PAGE                    0x00
 136 #define INQ_UNIT_SERIAL_NUMBER_PAGE                     0x80
 137 #define INQ_DEVICE_IDENTIFICATION_PAGE                  0x83
 138 #define INQ_EXTENDED_INQUIRY_DATA_PAGE                  0x86
 139 #define INQ_BDEV_CHARACTERISTICS_PAGE                   0xB1
 140 #define INQ_SERIAL_NUMBER_LENGTH                        0x14
 141 #define INQ_NUM_SUPPORTED_VPD_PAGES                     5
 142 #define VERSION_SPC_4                                   0x06
 143 #define ACA_UNSUPPORTED                                 0
 144 #define STANDARD_INQUIRY_LENGTH                         36
 145 #define ADDITIONAL_STD_INQ_LENGTH                       31
 146 #define EXTENDED_INQUIRY_DATA_PAGE_LENGTH               0x3C
 147 #define RESERVED_FIELD                                  0
 148
 149 /* SCSI READ/WRITE Defines */
 150 #define IO_CDB_WP_MASK                                  0xE0
 151 #define IO_CDB_WP_SHIFT                                 5
 152 #define IO_CDB_FUA_MASK                                 0x8
 153 #define IO_6_CDB_LBA_OFFSET                             0
 154 #define IO_6_CDB_LBA_MASK                               0x001FFFFF
 155 #define IO_6_CDB_TX_LEN_OFFSET                          4
 156 #define IO_6_DEFAULT_TX_LEN                             256
 157 #define IO_10_CDB_LBA_OFFSET                            2
 158 #define IO_10_CDB_TX_LEN_OFFSET                         7
 159 #define IO_10_CDB_WP_OFFSET                             1
 160 #define IO_10_CDB_FUA_OFFSET                            1
 161 #define IO_12_CDB_LBA_OFFSET                            2
 162 #define IO_12_CDB_TX_LEN_OFFSET                         6
 163 #define IO_12_CDB_WP_OFFSET                             1
 164 #define IO_12_CDB_FUA_OFFSET                            1
 165 #define IO_16_CDB_FUA_OFFSET                            1
 166 #define IO_16_CDB_WP_OFFSET                             1
 167 #define IO_16_CDB_LBA_OFFSET                            2
 168 #define IO_16_CDB_TX_LEN_OFFSET                         10
 169
 170 /* Mode Sense/Select defines */
 171 #define MODE_PAGE_INFO_EXCEP                            0x1C
 172 #define MODE_PAGE_CACHING                               0x08
 173 #define MODE_PAGE_CONTROL                               0x0A
 174 #define MODE_PAGE_POWER_CONDITION                       0x1A
 175 #define MODE_PAGE_RETURN_ALL                            0x3F
 176 #define MODE_PAGE_BLK_DES_LEN                           0x08
 177 #define MODE_PAGE_LLBAA_BLK_DES_LEN                     0x10
 178 #define MODE_PAGE_CACHING_LEN                           0x14
 179 #define MODE_PAGE_CONTROL_LEN                           0x0C
 180 #define MODE_PAGE_POW_CND_LEN                           0x28
 181 #define MODE_PAGE_INF_EXC_LEN                           0x0C
 182 #define MODE_PAGE_ALL_LEN                               0x54
 183 #define MODE_SENSE6_MPH_SIZE                            4
 184 #define MODE_SENSE6_ALLOC_LEN_OFFSET                    4
 185 #define MODE_SENSE_PAGE_CONTROL_OFFSET                  2
 186 #define MODE_SENSE_PAGE_CONTROL_MASK                    0xC0
 187 #define MODE_SENSE_PAGE_CODE_OFFSET                     2
 188 #define MODE_SENSE_PAGE_CODE_MASK                       0x3F
 189 #define MODE_SENSE_LLBAA_OFFSET                         1
 190 #define MODE_SENSE_LLBAA_MASK                           0x10
 191 #define MODE_SENSE_LLBAA_SHIFT                          4
 192 #define MODE_SENSE_DBD_OFFSET                           1
 193 #define MODE_SENSE_DBD_MASK                             8
 194 #define MODE_SENSE_DBD_SHIFT                            3
 195 #define MODE_SENSE10_MPH_SIZE                           8
 196 #define MODE_SENSE10_ALLOC_LEN_OFFSET                   7
 197 #define MODE_SELECT_CDB_PAGE_FORMAT_OFFSET              1
 198 #define MODE_SELECT_CDB_SAVE_PAGES_OFFSET               1
 199 #define MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET      4
 200 #define MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET     7
 201 #define MODE_SELECT_CDB_PAGE_FORMAT_MASK                0x10
 202 #define MODE_SELECT_CDB_SAVE_PAGES_MASK                 0x1
 203 #define MODE_SELECT_6_BD_OFFSET                         3
 204 #define MODE_SELECT_10_BD_OFFSET                        6
 205 #define MODE_SELECT_10_LLBAA_OFFSET                     4
 206 #define MODE_SELECT_10_LLBAA_MASK                       1
 207 #define MODE_SELECT_6_MPH_SIZE                          4
 208 #define MODE_SELECT_10_MPH_SIZE                         8
 209 #define CACHING_MODE_PAGE_WCE_MASK                      0x04
 210 #define MODE_SENSE_BLK_DESC_ENABLED                     0
 211 #define MODE_SENSE_BLK_DESC_COUNT                       1
 212 #define MODE_SELECT_PAGE_CODE_MASK                      0x3F
 213 #define SHORT_DESC_BLOCK                                8
 214 #define LONG_DESC_BLOCK                                 16
 215 #define MODE_PAGE_POW_CND_LEN_FIELD                     0x26
 216 #define MODE_PAGE_INF_EXC_LEN_FIELD                     0x0A
 217 #define MODE_PAGE_CACHING_LEN_FIELD                     0x12
 218 #define MODE_PAGE_CONTROL_LEN_FIELD                     0x0A
 219 #define MODE_SENSE_PC_CURRENT_VALUES                    0
 220
 221 /* Log Sense defines */
 222 #define LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE               0x00
 223 #define LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH             0x07
 224 #define LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE          0x2F
 225 #define LOG_PAGE_TEMPERATURE_PAGE                       0x0D
 226 #define LOG_SENSE_CDB_SP_OFFSET                         1
 227 #define LOG_SENSE_CDB_SP_NOT_ENABLED                    0
 228 #define LOG_SENSE_CDB_PC_OFFSET                         2
 229 #define LOG_SENSE_CDB_PC_MASK                           0xC0
 230 #define LOG_SENSE_CDB_PC_SHIFT                          6
 231 #define LOG_SENSE_CDB_PC_CUMULATIVE_VALUES              1
 232 #define LOG_SENSE_CDB_PAGE_CODE_MASK                    0x3F
 233 #define LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET               7
 234 #define REMAINING_INFO_EXCP_PAGE_LENGTH                 0x8
 235 #define LOG_INFO_EXCP_PAGE_LENGTH                       0xC
 236 #define REMAINING_TEMP_PAGE_LENGTH                      0xC
 237 #define LOG_TEMP_PAGE_LENGTH                            0x10
 238 #define LOG_TEMP_UNKNOWN                                0xFF
 239 #define SUPPORTED_LOG_PAGES_PAGE_LENGTH                 0x3
 240
 241 /* Read Capacity defines */
 242 #define READ_CAP_10_RESP_SIZE                           8
 243 #define READ_CAP_16_RESP_SIZE                           32
 244
 245 /* NVMe Namespace and Command Defines */
 246 #define NVME_GET_SMART_LOG_PAGE                         0x02
 247 #define NVME_GET_FEAT_TEMP_THRESH                       0x04
 248 #define BYTES_TO_DWORDS                                 4
 249 #define NVME_MAX_FIRMWARE_SLOT                          7
 250
 251 /* Report LUNs defines */
 252 #define REPORT_LUNS_FIRST_LUN_OFFSET                    8
 253
 254 /* SCSI ADDITIONAL SENSE Codes */
 255
 256 #define SCSI_ASC_NO_SENSE                               0x00
 257 #define SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT             0x03
 258 #define SCSI_ASC_LUN_NOT_READY                          0x04
 259 #define SCSI_ASC_WARNING                                0x0B
 260 #define SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED           0x10
 261 #define SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED          0x10
 262 #define SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED          0x10
 263 #define SCSI_ASC_UNRECOVERED_READ_ERROR                 0x11
 264 #define SCSI_ASC_MISCOMPARE_DURING_VERIFY               0x1D
 265 #define SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID           0x20
 266 #define SCSI_ASC_ILLEGAL_COMMAND                        0x20
 267 #define SCSI_ASC_ILLEGAL_BLOCK                          0x21
 268 #define SCSI_ASC_INVALID_CDB                            0x24
 269 #define SCSI_ASC_INVALID_LUN                            0x25
 270 #define SCSI_ASC_INVALID_PARAMETER                      0x26
 271 #define SCSI_ASC_FORMAT_COMMAND_FAILED                  0x31
 272 #define SCSI_ASC_INTERNAL_TARGET_FAILURE                0x44
 273
 274 /* SCSI ADDITIONAL SENSE Code Qualifiers */
 275
 276 #define SCSI_ASCQ_CAUSE_NOT_REPORTABLE                  0x00
 277 #define SCSI_ASCQ_FORMAT_COMMAND_FAILED                 0x01
 278 #define SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED          0x01
 279 #define SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED         0x02
 280 #define SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED         0x03
 281 #define SCSI_ASCQ_FORMAT_IN_PROGRESS                    0x04
 282 #define SCSI_ASCQ_POWER_LOSS_EXPECTED                   0x08
 283 #define SCSI_ASCQ_INVALID_LUN_ID                        0x09
 284
 285 /**
 286  * DEVICE_SPECIFIC_PARAMETER in mode parameter header (see sbc2r16) to
 287  * enable DPOFUA support type 0x10 value.
 288  */
 289 #define DEVICE_SPECIFIC_PARAMETER                       0
 290 #define VPD_ID_DESCRIPTOR_LENGTH sizeof(VPD_IDENTIFICATION_DESCRIPTOR)
 291
 292 /* MACROs to extract information from CDBs */
 293
 294 #define GET_OPCODE(cdb)         cdb[0]
 295
 296 #define GET_U8_FROM_CDB(cdb, index) (cdb[index] << 0)
 297
 298 #define GET_U16_FROM_CDB(cdb, index) ((cdb[index] << 8) | (cdb[index + 1] << 0))
 299
 300 #define GET_U24_FROM_CDB(cdb, index) ((cdb[index] << 16) | \
 301 (cdb[index + 1] <<  8) | \
 302 (cdb[index + 2] <<  0))
 303
 304 #define GET_U32_FROM_CDB(cdb, index) ((cdb[index] << 24) | \
 305 (cdb[index + 1] << 16) | \
 306 (cdb[index + 2] <<  8) | \
 307 (cdb[index + 3] <<  0))
 308
 309 #define GET_U64_FROM_CDB(cdb, index) ((((u64)cdb[index]) << 56) | \
 310 (((u64)cdb[index + 1]) << 48) | \
 311 (((u64)cdb[index + 2]) << 40) | \
 312 (((u64)cdb[index + 3]) << 32) | \
 313 (((u64)cdb[index + 4]) << 24) | \
 314 (((u64)cdb[index + 5]) << 16) | \
 315 (((u64)cdb[index + 6]) <<  8) | \
 316 (((u64)cdb[index + 7]) <<  0))
 317
 318 /* Inquiry Helper Macros */
 319 #define GET_INQ_EVPD_BIT(cdb) \
 320 ((GET_U8_FROM_CDB(cdb, INQUIRY_EVPD_BYTE_OFFSET) &              \
 321 INQUIRY_EVPD_BIT_MASK) ? 1 : 0)
 322
 323 #define GET_INQ_PAGE_CODE(cdb)                                  \
 324 (GET_U8_FROM_CDB(cdb, INQUIRY_PAGE_CODE_BYTE_OFFSET))
 325
 326 #define GET_INQ_ALLOC_LENGTH(cdb)                               \
 327 (GET_U16_FROM_CDB(cdb, INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET))
 328
 329 /* Report LUNs Helper Macros */
 330 #define GET_REPORT_LUNS_ALLOC_LENGTH(cdb)                       \
 331 (GET_U32_FROM_CDB(cdb, REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET))
 332
 333 /* Read Capacity Helper Macros */
 334 #define GET_READ_CAP_16_ALLOC_LENGTH(cdb)                       \
 335 (GET_U32_FROM_CDB(cdb, READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET))
 336
 337 #define IS_READ_CAP_16(cdb)                                     \
 338 ((cdb[0] == SERVICE_ACTION_IN && cdb[1] == SAI_READ_CAPACITY_16) ? 1 : 0)
 339
 340 /* Request Sense Helper Macros */
 341 #define GET_REQUEST_SENSE_ALLOC_LENGTH(cdb)                     \
 342 (GET_U8_FROM_CDB(cdb, REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET))
 343
 344 /* Mode Sense Helper Macros */
 345 #define GET_MODE_SENSE_DBD(cdb)                                 \
 346 ((GET_U8_FROM_CDB(cdb, MODE_SENSE_DBD_OFFSET) & MODE_SENSE_DBD_MASK) >> \
 347 MODE_SENSE_DBD_SHIFT)
 348
 349 #define GET_MODE_SENSE_LLBAA(cdb)                               \
 350 ((GET_U8_FROM_CDB(cdb, MODE_SENSE_LLBAA_OFFSET) &               \
 351 MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT)
 352
 353 #define GET_MODE_SENSE_MPH_SIZE(cdb10)                          \
 354 (cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE)
 355
 356
 357 /* Struct to gather data that needs to be extracted from a SCSI CDB.
 358    Not conforming to any particular CDB variant, but compatible with all. */
 359
 360 struct nvme_trans_io_cdb {
 361         u8 fua;
 362         u8 prot_info;
 363         u64 lba;
 364         u32 xfer_len;
 365 };
 366
 367
 368 /* Internal Helper Functions */
 369
 370
 371 /* Copy data to userspace memory */
 372
 373 static int nvme_trans_copy_to_user(struct sg_io_hdr *hdr, void *from,
 374                                                                 unsigned long n)
 375 {
 376         int res = SNTI_TRANSLATION_SUCCESS;
 377         unsigned long not_copied;
 378         int i;
 379         void *index = from;
 380         size_t remaining = n;
 381         size_t xfer_len;
 382
 383         if (hdr->iovec_count > 0) {
 384                 struct sg_iovec sgl;
 385
 386                 for (i = 0; i < hdr->iovec_count; i++) {
 387                         not_copied = copy_from_user(&sgl, hdr->dxferp +
 388                                                 i * sizeof(struct sg_iovec),
 389                                                 sizeof(struct sg_iovec));
 390                         if (not_copied)
 391                                 return -EFAULT;
 392                         xfer_len = min(remaining, sgl.iov_len);
 393                         not_copied = copy_to_user(sgl.iov_base, index,
 394                                                                 xfer_len);
 395                         if (not_copied) {
 396                                 res = -EFAULT;
 397                                 break;
 398                         }
 399                         index += xfer_len;
 400                         remaining -= xfer_len;
 401                         if (remaining == 0)
 402                                 break;
 403                 }
 404                 return res;
 405         }
 406         not_copied = copy_to_user(hdr->dxferp, from, n);
 407         if (not_copied)
 408                 res = -EFAULT;
 409         return res;
 410 }
 411
 412 /* Copy data from userspace memory */
 413
 414 static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,
 415                                                                 unsigned long n)
 416 {
 417         int res = SNTI_TRANSLATION_SUCCESS;
 418         unsigned long not_copied;
 419         int i;
 420         void *index = to;
 421         size_t remaining = n;
 422         size_t xfer_len;
 423
 424         if (hdr->iovec_count > 0) {
 425                 struct sg_iovec sgl;
 426
 427                 for (i = 0; i < hdr->iovec_count; i++) {
 428                         not_copied = copy_from_user(&sgl, hdr->dxferp +
 429                                                 i * sizeof(struct sg_iovec),
 430                                                 sizeof(struct sg_iovec));
 431                         if (not_copied)
 432                                 return -EFAULT;
 433                         xfer_len = min(remaining, sgl.iov_len);
 434                         not_copied = copy_from_user(index, sgl.iov_base,
 435                                                                 xfer_len);
 436                         if (not_copied) {
 437                                 res = -EFAULT;
 438                                 break;
 439                         }
 440                         index += xfer_len;
 441                         remaining -= xfer_len;
 442                         if (remaining == 0)
 443                                 break;
 444                 }
 445                 return res;
 446         }
 447
 448         not_copied = copy_from_user(to, hdr->dxferp, n);
 449         if (not_copied)
 450                 res = -EFAULT;
 451         return res;
 452 }
 453
 454 /* Status/Sense Buffer Writeback */
 455
 456 static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,
 457                                  u8 asc, u8 ascq)
 458 {
 459         int res = SNTI_TRANSLATION_SUCCESS;
 460         u8 xfer_len;
 461         u8 resp[DESC_FMT_SENSE_DATA_SIZE];
 462
 463         if (scsi_status_is_good(status)) {
 464                 hdr->status = SAM_STAT_GOOD;
 465                 hdr->masked_status = GOOD;
 466                 hdr->host_status = DID_OK;
 467                 hdr->driver_status = DRIVER_OK;
 468                 hdr->sb_len_wr = 0;
 469         } else {
 470                 hdr->status = status;
 471                 hdr->masked_status = status >> 1;
 472                 hdr->host_status = DID_OK;
 473                 hdr->driver_status = DRIVER_OK;
 474
 475                 memset(resp, 0, DESC_FMT_SENSE_DATA_SIZE);
 476                 resp[0] = DESC_FORMAT_SENSE_DATA;
 477                 resp[1] = sense_key;
 478                 resp[2] = asc;
 479                 resp[3] = ascq;
 480
 481                 xfer_len = min_t(u8, hdr->mx_sb_len, DESC_FMT_SENSE_DATA_SIZE);
 482                 hdr->sb_len_wr = xfer_len;
 483                 if (copy_to_user(hdr->sbp, resp, xfer_len) > 0)
 484                         res = -EFAULT;
 485         }
 486
 487         return res;
 488 }
 489
 490 static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)
 491 {
 492         u8 status, sense_key, asc, ascq;
 493         int res = SNTI_TRANSLATION_SUCCESS;
 494
 495         /* For non-nvme (Linux) errors, simply return the error code */
 496         if (nvme_sc < 0)
 497                 return nvme_sc;
 498
 499         /* Mask DNR, More, and reserved fields */
 500         nvme_sc &= 0x7FF;
 501
 502         switch (nvme_sc) {
 503         /* Generic Command Status */
 504         case NVME_SC_SUCCESS:
 505                 status = SAM_STAT_GOOD;
 506                 sense_key = NO_SENSE;
 507                 asc = SCSI_ASC_NO_SENSE;
 508                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 509                 break;
 510         case NVME_SC_INVALID_OPCODE:
 511                 status = SAM_STAT_CHECK_CONDITION;
 512                 sense_key = ILLEGAL_REQUEST;
 513                 asc = SCSI_ASC_ILLEGAL_COMMAND;
 514                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 515                 break;
 516         case NVME_SC_INVALID_FIELD:
 517                 status = SAM_STAT_CHECK_CONDITION;
 518                 sense_key = ILLEGAL_REQUEST;
 519                 asc = SCSI_ASC_INVALID_CDB;
 520                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 521                 break;
 522         case NVME_SC_DATA_XFER_ERROR:
 523                 status = SAM_STAT_CHECK_CONDITION;
 524                 sense_key = MEDIUM_ERROR;
 525                 asc = SCSI_ASC_NO_SENSE;
 526                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 527                 break;
 528         case NVME_SC_POWER_LOSS:
 529                 status = SAM_STAT_TASK_ABORTED;
 530                 sense_key = ABORTED_COMMAND;
 531                 asc = SCSI_ASC_WARNING;
 532                 ascq = SCSI_ASCQ_POWER_LOSS_EXPECTED;
 533                 break;
 534         case NVME_SC_INTERNAL:
 535                 status = SAM_STAT_CHECK_CONDITION;
 536                 sense_key = HARDWARE_ERROR;
 537                 asc = SCSI_ASC_INTERNAL_TARGET_FAILURE;
 538                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 539                 break;
 540         case NVME_SC_ABORT_REQ:
 541                 status = SAM_STAT_TASK_ABORTED;
 542                 sense_key = ABORTED_COMMAND;
 543                 asc = SCSI_ASC_NO_SENSE;
 544                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 545                 break;
 546         case NVME_SC_ABORT_QUEUE:
 547                 status = SAM_STAT_TASK_ABORTED;
 548                 sense_key = ABORTED_COMMAND;
 549                 asc = SCSI_ASC_NO_SENSE;
 550                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 551                 break;
 552         case NVME_SC_FUSED_FAIL:
 553                 status = SAM_STAT_TASK_ABORTED;
 554                 sense_key = ABORTED_COMMAND;
 555                 asc = SCSI_ASC_NO_SENSE;
 556                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 557                 break;
 558         case NVME_SC_FUSED_MISSING:
 559                 status = SAM_STAT_TASK_ABORTED;
 560                 sense_key = ABORTED_COMMAND;
 561                 asc = SCSI_ASC_NO_SENSE;
 562                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 563                 break;
 564         case NVME_SC_INVALID_NS:
 565                 status = SAM_STAT_CHECK_CONDITION;
 566                 sense_key = ILLEGAL_REQUEST;
 567                 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
 568                 ascq = SCSI_ASCQ_INVALID_LUN_ID;
 569                 break;
 570         case NVME_SC_LBA_RANGE:
 571                 status = SAM_STAT_CHECK_CONDITION;
 572                 sense_key = ILLEGAL_REQUEST;
 573                 asc = SCSI_ASC_ILLEGAL_BLOCK;
 574                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 575                 break;
 576         case NVME_SC_CAP_EXCEEDED:
 577                 status = SAM_STAT_CHECK_CONDITION;
 578                 sense_key = MEDIUM_ERROR;
 579                 asc = SCSI_ASC_NO_SENSE;
 580                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 581                 break;
 582         case NVME_SC_NS_NOT_READY:
 583                 status = SAM_STAT_CHECK_CONDITION;
 584                 sense_key = NOT_READY;
 585                 asc = SCSI_ASC_LUN_NOT_READY;
 586                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 587                 break;
 588
 589         /* Command Specific Status */
 590         case NVME_SC_INVALID_FORMAT:
 591                 status = SAM_STAT_CHECK_CONDITION;
 592                 sense_key = ILLEGAL_REQUEST;
 593                 asc = SCSI_ASC_FORMAT_COMMAND_FAILED;
 594                 ascq = SCSI_ASCQ_FORMAT_COMMAND_FAILED;
 595                 break;
 596         case NVME_SC_BAD_ATTRIBUTES:
 597                 status = SAM_STAT_CHECK_CONDITION;
 598                 sense_key = ILLEGAL_REQUEST;
 599                 asc = SCSI_ASC_INVALID_CDB;
 600                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 601                 break;
 602
 603         /* Media Errors */
 604         case NVME_SC_WRITE_FAULT:
 605                 status = SAM_STAT_CHECK_CONDITION;
 606                 sense_key = MEDIUM_ERROR;
 607                 asc = SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT;
 608                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 609                 break;
 610         case NVME_SC_READ_ERROR:
 611                 status = SAM_STAT_CHECK_CONDITION;
 612                 sense_key = MEDIUM_ERROR;
 613                 asc = SCSI_ASC_UNRECOVERED_READ_ERROR;
 614                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 615                 break;
 616         case NVME_SC_GUARD_CHECK:
 617                 status = SAM_STAT_CHECK_CONDITION;
 618                 sense_key = MEDIUM_ERROR;
 619                 asc = SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED;
 620                 ascq = SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED;
 621                 break;
 622         case NVME_SC_APPTAG_CHECK:
 623                 status = SAM_STAT_CHECK_CONDITION;
 624                 sense_key = MEDIUM_ERROR;
 625                 asc = SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED;
 626                 ascq = SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED;
 627                 break;
 628         case NVME_SC_REFTAG_CHECK:
 629                 status = SAM_STAT_CHECK_CONDITION;
 630                 sense_key = MEDIUM_ERROR;
 631                 asc = SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED;
 632                 ascq = SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED;
 633                 break;
 634         case NVME_SC_COMPARE_FAILED:
 635                 status = SAM_STAT_CHECK_CONDITION;
 636                 sense_key = MISCOMPARE;
 637                 asc = SCSI_ASC_MISCOMPARE_DURING_VERIFY;
 638                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 639                 break;
 640         case NVME_SC_ACCESS_DENIED:
 641                 status = SAM_STAT_CHECK_CONDITION;
 642                 sense_key = ILLEGAL_REQUEST;
 643                 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
 644                 ascq = SCSI_ASCQ_INVALID_LUN_ID;
 645                 break;
 646
 647         /* Unspecified/Default */
 648         case NVME_SC_CMDID_CONFLICT:
 649         case NVME_SC_CMD_SEQ_ERROR:
 650         case NVME_SC_CQ_INVALID:
 651         case NVME_SC_QID_INVALID:
 652         case NVME_SC_QUEUE_SIZE:
 653         case NVME_SC_ABORT_LIMIT:
 654         case NVME_SC_ABORT_MISSING:
 655         case NVME_SC_ASYNC_LIMIT:
 656         case NVME_SC_FIRMWARE_SLOT:
 657         case NVME_SC_FIRMWARE_IMAGE:
 658         case NVME_SC_INVALID_VECTOR:
 659         case NVME_SC_INVALID_LOG_PAGE:
 660         default:
 661                 status = SAM_STAT_CHECK_CONDITION;
 662                 sense_key = ILLEGAL_REQUEST;
 663                 asc = SCSI_ASC_NO_SENSE;
 664                 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
 665                 break;
 666         }
 667
 668         res = nvme_trans_completion(hdr, status, sense_key, asc, ascq);
 669
 670         return res;
 671 }
 672
 673 /* INQUIRY Helper Functions */
 674
 675 static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
 676                                         struct sg_io_hdr *hdr, u8 *inq_response,
 677                                         int alloc_len)
 678 {
 679         struct nvme_dev *dev = ns->dev;
 680         dma_addr_t dma_addr;
 681         void *mem;
 682         struct nvme_id_ns *id_ns;
 683         int res = SNTI_TRANSLATION_SUCCESS;
 684         int nvme_sc;
 685         int xfer_len;
 686         u8 resp_data_format = 0x02;
 687         u8 protect;
 688         u8 cmdque = 0x01 << 1;
 689
 690         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
 691                                 &dma_addr, GFP_KERNEL);
 692         if (mem == NULL) {
 693                 res = -ENOMEM;
 694                 goto out_dma;
 695         }
 696
 697         /* nvme ns identify - use DPS value for PROTECT field */
 698         nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
 699         res = nvme_trans_status_code(hdr, nvme_sc);
 700         /*
 701          * If nvme_sc was -ve, res will be -ve here.
 702          * If nvme_sc was +ve, the status would bace been translated, and res
 703          *  can only be 0 or -ve.
 704          *    - If 0 && nvme_sc > 0, then go into next if where res gets nvme_sc
 705          *    - If -ve, return because its a Linux error.
 706          */
 707         if (res)
 708                 goto out_free;
 709         if (nvme_sc) {
 710                 res = nvme_sc;
 711                 goto out_free;
 712         }
 713         id_ns = mem;
 714         (id_ns->dps) ? (protect = 0x01) : (protect = 0);
 715
 716         memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
 717         inq_response[2] = VERSION_SPC_4;
 718         inq_response[3] = resp_data_format;     /*normaca=0 | hisup=0 */
 719         inq_response[4] = ADDITIONAL_STD_INQ_LENGTH;
 720         inq_response[5] = protect;      /* sccs=0 | acc=0 | tpgs=0 | pc3=0 */
 721         inq_response[7] = cmdque;       /* wbus16=0 | sync=0 | vs=0 */
 722         strncpy(&inq_response[8], "NVMe    ", 8);
 723         strncpy(&inq_response[16], dev->model, 16);
 724         strncpy(&inq_response[32], dev->firmware_rev, 4);
 725
 726         xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
 727         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 728
 729  out_free:
 730         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
 731                           dma_addr);
 732  out_dma:
 733         return res;
 734 }
 735
 736 static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
 737                                         struct sg_io_hdr *hdr, u8 *inq_response,
 738                                         int alloc_len)
 739 {
 740         int res = SNTI_TRANSLATION_SUCCESS;
 741         int xfer_len;
 742
 743         memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
 744         inq_response[1] = INQ_SUPPORTED_VPD_PAGES_PAGE;   /* Page Code */
 745         inq_response[3] = INQ_NUM_SUPPORTED_VPD_PAGES;    /* Page Length */
 746         inq_response[4] = INQ_SUPPORTED_VPD_PAGES_PAGE;
 747         inq_response[5] = INQ_UNIT_SERIAL_NUMBER_PAGE;
 748         inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
 749         inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
 750         inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
 751
 752         xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
 753         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 754
 755         return res;
 756 }
 757
 758 static int nvme_trans_unit_serial_page(struct nvme_ns *ns,
 759                                         struct sg_io_hdr *hdr, u8 *inq_response,
 760                                         int alloc_len)
 761 {
 762         struct nvme_dev *dev = ns->dev;
 763         int res = SNTI_TRANSLATION_SUCCESS;
 764         int xfer_len;
 765
 766         memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
 767         inq_response[1] = INQ_UNIT_SERIAL_NUMBER_PAGE; /* Page Code */
 768         inq_response[3] = INQ_SERIAL_NUMBER_LENGTH;    /* Page Length */
 769         strncpy(&inq_response[4], dev->serial, INQ_SERIAL_NUMBER_LENGTH);
 770
 771         xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
 772         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 773
 774         return res;
 775 }
 776
 777 static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
 778                                         u8 *inq_response, int alloc_len)
 779 {
 780         struct nvme_dev *dev = ns->dev;
 781         dma_addr_t dma_addr;
 782         void *mem;
 783         struct nvme_id_ctrl *id_ctrl;
 784         int res = SNTI_TRANSLATION_SUCCESS;
 785         int nvme_sc;
 786         u8 ieee[4];
 787         int xfer_len;
 788         __be32 tmp_id = cpu_to_be32(ns->ns_id);
 789
 790         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
 791                                         &dma_addr, GFP_KERNEL);
 792         if (mem == NULL) {
 793                 res = -ENOMEM;
 794                 goto out_dma;
 795         }
 796
 797         /* nvme controller identify */
 798         nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
 799         res = nvme_trans_status_code(hdr, nvme_sc);
 800         if (res)
 801                 goto out_free;
 802         if (nvme_sc) {
 803                 res = nvme_sc;
 804                 goto out_free;
 805         }
 806         id_ctrl = mem;
 807
 808         /* Since SCSI tried to save 4 bits... [SPC-4(r34) Table 591] */
 809         ieee[0] = id_ctrl->ieee[0] << 4;
 810         ieee[1] = id_ctrl->ieee[0] >> 4 | id_ctrl->ieee[1] << 4;
 811         ieee[2] = id_ctrl->ieee[1] >> 4 | id_ctrl->ieee[2] << 4;
 812         ieee[3] = id_ctrl->ieee[2] >> 4;
 813
 814         memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
 815         inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE;    /* Page Code */
 816         inq_response[3] = 20;      /* Page Length */
 817         /* Designation Descriptor start */
 818         inq_response[4] = 0x01;    /* Proto ID=0h | Code set=1h */
 819         inq_response[5] = 0x03;    /* PIV=0b | Asso=00b | Designator Type=3h */
 820         inq_response[6] = 0x00;    /* Rsvd */
 821         inq_response[7] = 16;      /* Designator Length */
 822         /* Designator start */
 823         inq_response[8] = 0x60 | ieee[3]; /* NAA=6h | IEEE ID MSB, High nibble*/
 824         inq_response[9] = ieee[2];        /* IEEE ID */
 825         inq_response[10] = ieee[1];       /* IEEE ID */
 826         inq_response[11] = ieee[0];       /* IEEE ID| Vendor Specific ID... */
 827         inq_response[12] = (dev->pci_dev->vendor & 0xFF00) >> 8;
 828         inq_response[13] = (dev->pci_dev->vendor & 0x00FF);
 829         inq_response[14] = dev->serial[0];
 830         inq_response[15] = dev->serial[1];
 831         inq_response[16] = dev->model[0];
 832         inq_response[17] = dev->model[1];
 833         memcpy(&inq_response[18], &tmp_id, sizeof(u32));
 834         /* Last 2 bytes are zero */
 835
 836         xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
 837         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 838
 839  out_free:
 840         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
 841                           dma_addr);
 842  out_dma:
 843         return res;
 844 }
 845
 846 static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
 847                                         int alloc_len)
 848 {
 849         u8 *inq_response;
 850         int res = SNTI_TRANSLATION_SUCCESS;
 851         int nvme_sc;
 852         struct nvme_dev *dev = ns->dev;
 853         dma_addr_t dma_addr;
 854         void *mem;
 855         struct nvme_id_ctrl *id_ctrl;
 856         struct nvme_id_ns *id_ns;
 857         int xfer_len;
 858         u8 microcode = 0x80;
 859         u8 spt;
 860         u8 spt_lut[8] = {0, 0, 2, 1, 4, 6, 5, 7};
 861         u8 grd_chk, app_chk, ref_chk, protect;
 862         u8 uask_sup = 0x20;
 863         u8 v_sup;
 864         u8 luiclr = 0x01;
 865
 866         inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
 867         if (inq_response == NULL) {
 868                 res = -ENOMEM;
 869                 goto out_mem;
 870         }
 871
 872         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
 873                                                         &dma_addr, GFP_KERNEL);
 874         if (mem == NULL) {
 875                 res = -ENOMEM;
 876                 goto out_dma;
 877         }
 878
 879         /* nvme ns identify */
 880         nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
 881         res = nvme_trans_status_code(hdr, nvme_sc);
 882         if (res)
 883                 goto out_free;
 884         if (nvme_sc) {
 885                 res = nvme_sc;
 886                 goto out_free;
 887         }
 888         id_ns = mem;
 889         spt = spt_lut[(id_ns->dpc) & 0x07] << 3;
 890         (id_ns->dps) ? (protect = 0x01) : (protect = 0);
 891         grd_chk = protect << 2;
 892         app_chk = protect << 1;
 893         ref_chk = protect;
 894
 895         /* nvme controller identify */
 896         nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
 897         res = nvme_trans_status_code(hdr, nvme_sc);
 898         if (res)
 899                 goto out_free;
 900         if (nvme_sc) {
 901                 res = nvme_sc;
 902                 goto out_free;
 903         }
 904         id_ctrl = mem;
 905         v_sup = id_ctrl->vwc;
 906
 907         memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
 908         inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE;    /* Page Code */
 909         inq_response[2] = 0x00;    /* Page Length MSB */
 910         inq_response[3] = 0x3C;    /* Page Length LSB */
 911         inq_response[4] = microcode | spt | grd_chk | app_chk | ref_chk;
 912         inq_response[5] = uask_sup;
 913         inq_response[6] = v_sup;
 914         inq_response[7] = luiclr;
 915         inq_response[8] = 0;
 916         inq_response[9] = 0;
 917
 918         xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
 919         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 920
 921  out_free:
 922         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
 923                           dma_addr);
 924  out_dma:
 925         kfree(inq_response);
 926  out_mem:
 927         return res;
 928 }
 929
 930 static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
 931                                         int alloc_len)
 932 {
 933         u8 *inq_response;
 934         int res = SNTI_TRANSLATION_SUCCESS;
 935         int xfer_len;
 936
 937         inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
 938         if (inq_response == NULL) {
 939                 res = -ENOMEM;
 940                 goto out_mem;
 941         }
 942
 943         inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE;    /* Page Code */
 944         inq_response[2] = 0x00;    /* Page Length MSB */
 945         inq_response[3] = 0x3C;    /* Page Length LSB */
 946         inq_response[4] = 0x00;    /* Medium Rotation Rate MSB */
 947         inq_response[5] = 0x01;    /* Medium Rotation Rate LSB */
 948         inq_response[6] = 0x00;    /* Form Factor */
 949
 950         xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
 951         res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
 952
 953         kfree(inq_response);
 954  out_mem:
 955         return res;
 956 }
 957
 958 /* LOG SENSE Helper Functions */
 959
 960 static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
 961                                         int alloc_len)
 962 {
 963         int res = SNTI_TRANSLATION_SUCCESS;
 964         int xfer_len;
 965         u8 *log_response;
 966
 967         log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
 968         if (log_response == NULL) {
 969                 res = -ENOMEM;
 970                 goto out_mem;
 971         }
 972
 973         log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
 974         /* Subpage=0x00, Page Length MSB=0 */
 975         log_response[3] = SUPPORTED_LOG_PAGES_PAGE_LENGTH;
 976         log_response[4] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
 977         log_response[5] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
 978         log_response[6] = LOG_PAGE_TEMPERATURE_PAGE;
 979
 980         xfer_len = min(alloc_len, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
 981         res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
 982
 983         kfree(log_response);
 984  out_mem:
 985         return res;
 986 }
 987
 988 static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
 989                                         struct sg_io_hdr *hdr, int alloc_len)
 990 {
 991         int res = SNTI_TRANSLATION_SUCCESS;
 992         int xfer_len;
 993         u8 *log_response;
 994         struct nvme_command c;
 995         struct nvme_dev *dev = ns->dev;
 996         struct nvme_smart_log *smart_log;
 997         dma_addr_t dma_addr;
 998         void *mem;
 999         u8 temp_c;
1000         u16 temp_k;
1001
1002         log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
1003         if (log_response == NULL) {
1004                 res = -ENOMEM;
1005                 goto out_mem;
1006         }
1007
1008         mem = dma_alloc_coherent(&dev->pci_dev->dev,
1009                                         sizeof(struct nvme_smart_log),
1010                                         &dma_addr, GFP_KERNEL);
1011         if (mem == NULL) {
1012                 res = -ENOMEM;
1013                 goto out_dma;
1014         }
1015
1016         /* Get SMART Log Page */
1017         memset(&c, 0, sizeof(c));
1018         c.common.opcode = nvme_admin_get_log_page;
1019         c.common.nsid = cpu_to_le32(0xFFFFFFFF);
1020         c.common.prp1 = cpu_to_le64(dma_addr);
1021         c.common.cdw10[0] = cpu_to_le32(((sizeof(struct nvme_smart_log) /
1022                         BYTES_TO_DWORDS) << 16) | NVME_GET_SMART_LOG_PAGE);
1023         res = nvme_submit_admin_cmd(dev, &c, NULL);
1024         if (res != NVME_SC_SUCCESS) {
1025                 temp_c = LOG_TEMP_UNKNOWN;
1026         } else {
1027                 smart_log = mem;
1028                 temp_k = (smart_log->temperature[1] << 8) +
1029                                 (smart_log->temperature[0]);
1030                 temp_c = temp_k - KELVIN_TEMP_FACTOR;
1031         }
1032
1033         log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
1034         /* Subpage=0x00, Page Length MSB=0 */
1035         log_response[3] = REMAINING_INFO_EXCP_PAGE_LENGTH;
1036         /* Informational Exceptions Log Parameter 1 Start */
1037         /* Parameter Code=0x0000 bytes 4,5 */
1038         log_response[6] = 0x23; /* DU=0, TSD=1, ETC=0, TMC=0, FMT_AND_LNK=11b */
1039         log_response[7] = 0x04; /* PARAMETER LENGTH */
1040         /* Add sense Code and qualifier = 0x00 each */
1041         /* Use Temperature from NVMe Get Log Page, convert to C from K */
1042         log_response[10] = temp_c;
1043
1044         xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
1045         res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
1046
1047         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
1048                           mem, dma_addr);
1049  out_dma:
1050         kfree(log_response);
1051  out_mem:
1052         return res;
1053 }
1054
1055 static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1056                                         int alloc_len)
1057 {
1058         int res = SNTI_TRANSLATION_SUCCESS;
1059         int xfer_len;
1060         u8 *log_response;
1061         struct nvme_command c;
1062         struct nvme_dev *dev = ns->dev;
1063         struct nvme_smart_log *smart_log;
1064         dma_addr_t dma_addr;
1065         void *mem;
1066         u32 feature_resp;
1067         u8 temp_c_cur, temp_c_thresh;
1068         u16 temp_k;
1069
1070         log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
1071         if (log_response == NULL) {
1072                 res = -ENOMEM;
1073                 goto out_mem;
1074         }
1075
1076         mem = dma_alloc_coherent(&dev->pci_dev->dev,
1077                                         sizeof(struct nvme_smart_log),
1078                                         &dma_addr, GFP_KERNEL);
1079         if (mem == NULL) {
1080                 res = -ENOMEM;
1081                 goto out_dma;
1082         }
1083
1084         /* Get SMART Log Page */
1085         memset(&c, 0, sizeof(c));
1086         c.common.opcode = nvme_admin_get_log_page;
1087         c.common.nsid = cpu_to_le32(0xFFFFFFFF);
1088         c.common.prp1 = cpu_to_le64(dma_addr);
1089         c.common.cdw10[0] = cpu_to_le32(((sizeof(struct nvme_smart_log) /
1090                         BYTES_TO_DWORDS) << 16) | NVME_GET_SMART_LOG_PAGE);
1091         res = nvme_submit_admin_cmd(dev, &c, NULL);
1092         if (res != NVME_SC_SUCCESS) {
1093                 temp_c_cur = LOG_TEMP_UNKNOWN;
1094         } else {
1095                 smart_log = mem;
1096                 temp_k = (smart_log->temperature[1] << 8) +
1097                                 (smart_log->temperature[0]);
1098                 temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
1099         }
1100
1101         /* Get Features for Temp Threshold */
1102         res = nvme_get_features(dev, NVME_FEAT_TEMP_THRESH, 0, 0,
1103                                                                 &feature_resp);
1104         if (res != NVME_SC_SUCCESS)
1105                 temp_c_thresh = LOG_TEMP_UNKNOWN;
1106         else
1107                 temp_c_thresh = (feature_resp & 0xFFFF) - KELVIN_TEMP_FACTOR;
1108
1109         log_response[0] = LOG_PAGE_TEMPERATURE_PAGE;
1110         /* Subpage=0x00, Page Length MSB=0 */
1111         log_response[3] = REMAINING_TEMP_PAGE_LENGTH;
1112         /* Temperature Log Parameter 1 (Temperature) Start */
1113         /* Parameter Code = 0x0000 */
1114         log_response[6] = 0x01;         /* Format and Linking = 01b */
1115         log_response[7] = 0x02;         /* Parameter Length */
1116         /* Use Temperature from NVMe Get Log Page, convert to C from K */
1117         log_response[9] = temp_c_cur;
1118         /* Temperature Log Parameter 2 (Reference Temperature) Start */
1119         log_response[11] = 0x01;        /* Parameter Code = 0x0001 */
1120         log_response[12] = 0x01;        /* Format and Linking = 01b */
1121         log_response[13] = 0x02;        /* Parameter Length */
1122         /* Use Temperature Thresh from NVMe Get Log Page, convert to C from K */
1123         log_response[15] = temp_c_thresh;
1124
1125         xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
1126         res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
1127
1128         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
1129                           mem, dma_addr);
1130  out_dma:
1131         kfree(log_response);
1132  out_mem:
1133         return res;
1134 }
1135
1136 /* MODE SENSE Helper Functions */
1137
1138 static int nvme_trans_fill_mode_parm_hdr(u8 *resp, int len, u8 cdb10, u8 llbaa,
1139                                         u16 mode_data_length, u16 blk_desc_len)
1140 {
1141         /* Quick check to make sure I don't stomp on my own memory... */
1142         if ((cdb10 && len < 8) || (!cdb10 && len < 4))
1143                 return SNTI_INTERNAL_ERROR;
1144
1145         if (cdb10) {
1146                 resp[0] = (mode_data_length & 0xFF00) >> 8;
1147                 resp[1] = (mode_data_length & 0x00FF);
1148                 /* resp[2] and [3] are zero */
1149                 resp[4] = llbaa;
1150                 resp[5] = RESERVED_FIELD;
1151                 resp[6] = (blk_desc_len & 0xFF00) >> 8;
1152                 resp[7] = (blk_desc_len & 0x00FF);
1153         } else {
1154                 resp[0] = (mode_data_length & 0x00FF);
1155                 /* resp[1] and [2] are zero */
1156                 resp[3] = (blk_desc_len & 0x00FF);
1157         }
1158
1159         return SNTI_TRANSLATION_SUCCESS;
1160 }
1161
1162 static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1163                                     u8 *resp, int len, u8 llbaa)
1164 {
1165         int res = SNTI_TRANSLATION_SUCCESS;
1166         int nvme_sc;
1167         struct nvme_dev *dev = ns->dev;
1168         dma_addr_t dma_addr;
1169         void *mem;
1170         struct nvme_id_ns *id_ns;
1171         u8 flbas;
1172         u32 lba_length;
1173
1174         if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
1175                 return SNTI_INTERNAL_ERROR;
1176         else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
1177                 return SNTI_INTERNAL_ERROR;
1178
1179         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1180                                                         &dma_addr, GFP_KERNEL);
1181         if (mem == NULL) {
1182                 res = -ENOMEM;
1183                 goto out;
1184         }
1185
1186         /* nvme ns identify */
1187         nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1188         res = nvme_trans_status_code(hdr, nvme_sc);
1189         if (res)
1190                 goto out_dma;
1191         if (nvme_sc) {
1192                 res = nvme_sc;
1193                 goto out_dma;
1194         }
1195         id_ns = mem;
1196         flbas = (id_ns->flbas) & 0x0F;
1197         lba_length = (1 << (id_ns->lbaf[flbas].ds));
1198
1199         if (llbaa == 0) {
1200                 __be32 tmp_cap = cpu_to_be32(le64_to_cpu(id_ns->ncap));
1201                 /* Byte 4 is reserved */
1202                 __be32 tmp_len = cpu_to_be32(lba_length & 0x00FFFFFF);
1203
1204                 memcpy(resp, &tmp_cap, sizeof(u32));
1205                 memcpy(&resp[4], &tmp_len, sizeof(u32));
1206         } else {
1207                 __be64 tmp_cap = cpu_to_be64(le64_to_cpu(id_ns->ncap));
1208                 __be32 tmp_len = cpu_to_be32(lba_length);
1209
1210                 memcpy(resp, &tmp_cap, sizeof(u64));
1211                 /* Bytes 8, 9, 10, 11 are reserved */
1212                 memcpy(&resp[12], &tmp_len, sizeof(u32));
1213         }
1214
1215  out_dma:
1216         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
1217                           dma_addr);
1218  out:
1219         return res;
1220 }
1221
1222 static int nvme_trans_fill_control_page(struct nvme_ns *ns,
1223                                         struct sg_io_hdr *hdr, u8 *resp,
1224                                         int len)
1225 {
1226         if (len < MODE_PAGE_CONTROL_LEN)
1227                 return SNTI_INTERNAL_ERROR;
1228
1229         resp[0] = MODE_PAGE_CONTROL;
1230         resp[1] = MODE_PAGE_CONTROL_LEN_FIELD;
1231         resp[2] = 0x0E;         /* TST=000b, TMF_ONLY=0, DPICZ=1,
1232                                  * D_SENSE=1, GLTSD=1, RLEC=0 */
1233         resp[3] = 0x12;         /* Q_ALGO_MODIFIER=1h, NUAR=0, QERR=01b */
1234         /* Byte 4:  VS=0, RAC=0, UA_INT=0, SWP=0 */
1235         resp[5] = 0x40;         /* ATO=0, TAS=1, ATMPE=0, RWWP=0, AUTOLOAD=0 */
1236         /* resp[6] and [7] are obsolete, thus zero */
1237         resp[8] = 0xFF;         /* Busy timeout period = 0xffff */
1238         resp[9] = 0xFF;
1239         /* Bytes 10,11: Extended selftest completion time = 0x0000 */
1240
1241         return SNTI_TRANSLATION_SUCCESS;
1242 }
1243
1244 static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
1245                                         struct sg_io_hdr *hdr,
1246                                         u8 *resp, int len)
1247 {
1248         int res = SNTI_TRANSLATION_SUCCESS;
1249         int nvme_sc;
1250         struct nvme_dev *dev = ns->dev;
1251         u32 feature_resp;
1252         u8 vwc;
1253
1254         if (len < MODE_PAGE_CACHING_LEN)
1255                 return SNTI_INTERNAL_ERROR;
1256
1257         nvme_sc = nvme_get_features(dev, NVME_FEAT_VOLATILE_WC, 0, 0,
1258                                                                 &feature_resp);
1259         res = nvme_trans_status_code(hdr, nvme_sc);
1260         if (res)
1261                 goto out;
1262         if (nvme_sc) {
1263                 res = nvme_sc;
1264                 goto out;
1265         }
1266         vwc = feature_resp & 0x00000001;
1267
1268         resp[0] = MODE_PAGE_CACHING;
1269         resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
1270         resp[2] = vwc << 2;
1271
1272  out:
1273         return res;
1274 }
1275
1276 static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
1277                                         struct sg_io_hdr *hdr, u8 *resp,
1278                                         int len)
1279 {
1280         int res = SNTI_TRANSLATION_SUCCESS;
1281
1282         if (len < MODE_PAGE_POW_CND_LEN)
1283                 return SNTI_INTERNAL_ERROR;
1284
1285         resp[0] = MODE_PAGE_POWER_CONDITION;
1286         resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
1287         /* All other bytes are zero */
1288
1289         return res;
1290 }
1291
1292 static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
1293                                         struct sg_io_hdr *hdr, u8 *resp,
1294                                         int len)
1295 {
1296         int res = SNTI_TRANSLATION_SUCCESS;
1297
1298         if (len < MODE_PAGE_INF_EXC_LEN)
1299                 return SNTI_INTERNAL_ERROR;
1300
1301         resp[0] = MODE_PAGE_INFO_EXCEP;
1302         resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
1303         resp[2] = 0x88;
1304         /* All other bytes are zero */
1305
1306         return res;
1307 }
1308
1309 static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1310                                      u8 *resp, int len)
1311 {
1312         int res = SNTI_TRANSLATION_SUCCESS;
1313         u16 mode_pages_offset_1 = 0;
1314         u16 mode_pages_offset_2, mode_pages_offset_3, mode_pages_offset_4;
1315
1316         mode_pages_offset_2 = mode_pages_offset_1 + MODE_PAGE_CACHING_LEN;
1317         mode_pages_offset_3 = mode_pages_offset_2 + MODE_PAGE_CONTROL_LEN;
1318         mode_pages_offset_4 = mode_pages_offset_3 + MODE_PAGE_POW_CND_LEN;
1319
1320         res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],
1321                                         MODE_PAGE_CACHING_LEN);
1322         if (res != SNTI_TRANSLATION_SUCCESS)
1323                 goto out;
1324         res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
1325                                         MODE_PAGE_CONTROL_LEN);
1326         if (res != SNTI_TRANSLATION_SUCCESS)
1327                 goto out;
1328         res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
1329                                         MODE_PAGE_POW_CND_LEN);
1330         if (res != SNTI_TRANSLATION_SUCCESS)
1331                 goto out;
1332         res = nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
1333                                         MODE_PAGE_INF_EXC_LEN);
1334         if (res != SNTI_TRANSLATION_SUCCESS)
1335                 goto out;
1336
1337  out:
1338         return res;
1339 }
1340
1341 static inline int nvme_trans_get_blk_desc_len(u8 dbd, u8 llbaa)
1342 {
1343         if (dbd == MODE_SENSE_BLK_DESC_ENABLED) {
1344                 /* SPC-4: len = 8 x Num_of_descriptors if llbaa = 0, 16x if 1 */
1345                 return 8 * (llbaa + 1) * MODE_SENSE_BLK_DESC_COUNT;
1346         } else {
1347                 return 0;
1348         }
1349 }
1350
1351 static int nvme_trans_mode_page_create(struct nvme_ns *ns,
1352                                         struct sg_io_hdr *hdr, u8 *cmd,
1353                                         u16 alloc_len, u8 cdb10,
1354                                         int (*mode_page_fill_func)
1355                                         (struct nvme_ns *,
1356                                         struct sg_io_hdr *hdr, u8 *, int),
1357                                         u16 mode_pages_tot_len)
1358 {
1359         int res = SNTI_TRANSLATION_SUCCESS;
1360         int xfer_len;
1361         u8 *response;
1362         u8 dbd, llbaa;
1363         u16 resp_size;
1364         int mph_size;
1365         u16 mode_pages_offset_1;
1366         u16 blk_desc_len, blk_desc_offset, mode_data_length;
1367
1368         dbd = GET_MODE_SENSE_DBD(cmd);
1369         llbaa = GET_MODE_SENSE_LLBAA(cmd);
1370         mph_size = GET_MODE_SENSE_MPH_SIZE(cdb10);
1371         blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa);
1372
1373         resp_size = mph_size + blk_desc_len + mode_pages_tot_len;
1374         /* Refer spc4r34 Table 440 for calculation of Mode data Length field */
1375         mode_data_length = 3 + (3 * cdb10) + blk_desc_len + mode_pages_tot_len;
1376
1377         blk_desc_offset = mph_size;
1378         mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
1379
1380         response = kzalloc(resp_size, GFP_KERNEL);
1381         if (response == NULL) {
1382                 res = -ENOMEM;
1383                 goto out_mem;
1384         }
1385
1386         res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
1387                                         llbaa, mode_data_length, blk_desc_len);
1388         if (res != SNTI_TRANSLATION_SUCCESS)
1389                 goto out_free;
1390         if (blk_desc_len > 0) {
1391                 res = nvme_trans_fill_blk_desc(ns, hdr,
1392                                                &response[blk_desc_offset],
1393                                                blk_desc_len, llbaa);
1394                 if (res != SNTI_TRANSLATION_SUCCESS)
1395                         goto out_free;
1396         }
1397         res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
1398                                         mode_pages_tot_len);
1399         if (res != SNTI_TRANSLATION_SUCCESS)
1400                 goto out_free;
1401
1402         xfer_len = min(alloc_len, resp_size);
1403         res = nvme_trans_copy_to_user(hdr, response, xfer_len);
1404
1405  out_free:
1406         kfree(response);
1407  out_mem:
1408         return res;
1409 }
1410
1411 /* Read Capacity Helper Functions */
1412
1413 static void nvme_trans_fill_read_cap(u8 *response, struct nvme_id_ns *id_ns,
1414                                                                 u8 cdb16)
1415 {
1416         u8 flbas;
1417         u32 lba_length;
1418         u64 rlba;
1419         u8 prot_en;
1420         u8 p_type_lut[4] = {0, 0, 1, 2};
1421         __be64 tmp_rlba;
1422         __be32 tmp_rlba_32;
1423         __be32 tmp_len;
1424
1425         flbas = (id_ns->flbas) & 0x0F;
1426         lba_length = (1 << (id_ns->lbaf[flbas].ds));
1427         rlba = le64_to_cpup(&id_ns->nsze) - 1;
1428         (id_ns->dps) ? (prot_en = 0x01) : (prot_en = 0);
1429
1430         if (!cdb16) {
1431                 if (rlba > 0xFFFFFFFF)
1432                         rlba = 0xFFFFFFFF;
1433                 tmp_rlba_32 = cpu_to_be32(rlba);
1434                 tmp_len = cpu_to_be32(lba_length);
1435                 memcpy(response, &tmp_rlba_32, sizeof(u32));
1436                 memcpy(&response[4], &tmp_len, sizeof(u32));
1437         } else {
1438                 tmp_rlba = cpu_to_be64(rlba);
1439                 tmp_len = cpu_to_be32(lba_length);
1440                 memcpy(response, &tmp_rlba, sizeof(u64));
1441                 memcpy(&response[8], &tmp_len, sizeof(u32));
1442                 response[12] = (p_type_lut[id_ns->dps & 0x3] << 1) | prot_en;
1443                 /* P_I_Exponent = 0x0 | LBPPBE = 0x0 */
1444                 /* LBPME = 0 | LBPRZ = 0 | LALBA = 0x00 */
1445                 /* Bytes 16-31 - Reserved */
1446         }
1447 }
1448
1449 /* Start Stop Unit Helper Functions */
1450
1451 static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1452                                                 u8 pc, u8 pcmod, u8 start)
1453 {
1454         int res = SNTI_TRANSLATION_SUCCESS;
1455         int nvme_sc;
1456         struct nvme_dev *dev = ns->dev;
1457         dma_addr_t dma_addr;
1458         void *mem;
1459         struct nvme_id_ctrl *id_ctrl;
1460         int lowest_pow_st;      /* max npss = lowest power consumption */
1461         unsigned ps_desired = 0;
1462
1463         /* NVMe Controller Identify */
1464         mem = dma_alloc_coherent(&dev->pci_dev->dev,
1465                                 sizeof(struct nvme_id_ctrl),
1466                                 &dma_addr, GFP_KERNEL);
1467         if (mem == NULL) {
1468                 res = -ENOMEM;
1469                 goto out;
1470         }
1471         nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
1472         res = nvme_trans_status_code(hdr, nvme_sc);
1473         if (res)
1474                 goto out_dma;
1475         if (nvme_sc) {
1476                 res = nvme_sc;
1477                 goto out_dma;
1478         }
1479         id_ctrl = mem;
1480         lowest_pow_st = id_ctrl->npss - 1;
1481
1482         switch (pc) {
1483         case NVME_POWER_STATE_START_VALID:
1484                 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1485                 if (pcmod == 0 && start == 0x1)
1486                         ps_desired = POWER_STATE_0;
1487                 if (pcmod == 0 && start == 0x0)
1488                         ps_desired = lowest_pow_st;
1489                 break;
1490         case NVME_POWER_STATE_ACTIVE:
1491                 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1492                 if (pcmod == 0)
1493                         ps_desired = POWER_STATE_0;
1494                 break;
1495         case NVME_POWER_STATE_IDLE:
1496                 /* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
1497                 /* min of desired state and (lps-1) because lps is STOP */
1498                 if (pcmod == 0x0)
1499                         ps_desired = min(POWER_STATE_1, (lowest_pow_st - 1));
1500                 else if (pcmod == 0x1)
1501                         ps_desired = min(POWER_STATE_2, (lowest_pow_st - 1));
1502                 else if (pcmod == 0x2)
1503                         ps_desired = min(POWER_STATE_3, (lowest_pow_st - 1));
1504                 break;
1505         case NVME_POWER_STATE_STANDBY:
1506                 /* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
1507                 if (pcmod == 0x0)
1508                         ps_desired = max(0, (lowest_pow_st - 2));
1509                 else if (pcmod == 0x1)
1510                         ps_desired = max(0, (lowest_pow_st - 1));
1511                 break;
1512         case NVME_POWER_STATE_LU_CONTROL:
1513         default:
1514                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1515                                 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1516                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1517                 break;
1518         }
1519         nvme_sc = nvme_set_features(dev, NVME_FEAT_POWER_MGMT, ps_desired, 0,
1520                                     NULL);
1521         res = nvme_trans_status_code(hdr, nvme_sc);
1522         if (res)
1523                 goto out_dma;
1524         if (nvme_sc)
1525                 res = nvme_sc;
1526  out_dma:
1527         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
1528                           dma_addr);
1529  out:
1530         return res;
1531 }
1532
1533 /* Write Buffer Helper Functions */
1534 /* Also using this for Format Unit with hdr passed as NULL, and buffer_id, 0 */
1535
1536 static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1537                                         u8 opcode, u32 tot_len, u32 offset,
1538                                         u8 buffer_id)
1539 {
1540         int res = SNTI_TRANSLATION_SUCCESS;
1541         int nvme_sc;
1542         struct nvme_dev *dev = ns->dev;
1543         struct nvme_command c;
1544         struct nvme_iod *iod = NULL;
1545         unsigned length;
1546
1547         memset(&c, 0, sizeof(c));
1548         c.common.opcode = opcode;
1549         if (opcode == nvme_admin_download_fw) {
1550                 if (hdr->iovec_count > 0) {
1551                         /* Assuming SGL is not allowed for this command */
1552                         res = nvme_trans_completion(hdr,
1553                                                 SAM_STAT_CHECK_CONDITION,
1554                                                 ILLEGAL_REQUEST,
1555                                                 SCSI_ASC_INVALID_CDB,
1556                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1557                         goto out;
1558                 }
1559                 iod = nvme_map_user_pages(dev, DMA_TO_DEVICE,
1560                                 (unsigned long)hdr->dxferp, tot_len);
1561                 if (IS_ERR(iod)) {
1562                         res = PTR_ERR(iod);
1563                         goto out;
1564                 }
1565                 length = nvme_setup_prps(dev, &c.common, iod, tot_len,
1566                                                                 GFP_KERNEL);
1567                 if (length != tot_len) {
1568                         res = -ENOMEM;
1569                         goto out_unmap;
1570                 }
1571
1572                 c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
1573                 c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
1574         } else if (opcode == nvme_admin_activate_fw) {
1575                 u32 cdw10 = buffer_id | NVME_FWACT_REPL_ACTV;
1576                 c.common.cdw10[0] = cpu_to_le32(cdw10);
1577         }
1578
1579         nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
1580         res = nvme_trans_status_code(hdr, nvme_sc);
1581         if (res)
1582                 goto out_unmap;
1583         if (nvme_sc)
1584                 res = nvme_sc;
1585
1586  out_unmap:
1587         if (opcode == nvme_admin_download_fw) {
1588                 nvme_unmap_user_pages(dev, DMA_TO_DEVICE, iod);
1589                 nvme_free_iod(dev, iod);
1590         }
1591  out:
1592         return res;
1593 }
1594
1595 /* Mode Select Helper Functions */
1596
1597 static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10,
1598                                                 u16 *bd_len, u8 *llbaa)
1599 {
1600         if (cdb10) {
1601                 /* 10 Byte CDB */
1602                 *bd_len = (parm_list[MODE_SELECT_10_BD_OFFSET] << 8) +
1603                         parm_list[MODE_SELECT_10_BD_OFFSET + 1];
1604                 *llbaa = parm_list[MODE_SELECT_10_LLBAA_OFFSET] &&
1605                                 MODE_SELECT_10_LLBAA_MASK;
1606         } else {
1607                 /* 6 Byte CDB */
1608                 *bd_len = parm_list[MODE_SELECT_6_BD_OFFSET];
1609         }
1610 }
1611
1612 static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list,
1613                                         u16 idx, u16 bd_len, u8 llbaa)
1614 {
1615         u16 bd_num;
1616
1617         bd_num = bd_len / ((llbaa == 0) ?
1618                         SHORT_DESC_BLOCK : LONG_DESC_BLOCK);
1619         /* Store block descriptor info if a FORMAT UNIT comes later */
1620         /* TODO Saving 1st BD info; what to do if multiple BD received? */
1621         if (llbaa == 0) {
1622                 /* Standard Block Descriptor - spc4r34 7.5.5.1 */
1623                 ns->mode_select_num_blocks =
1624                                 (parm_list[idx + 1] << 16) +
1625                                 (parm_list[idx + 2] << 8) +
1626                                 (parm_list[idx + 3]);
1627
1628                 ns->mode_select_block_len =
1629                                 (parm_list[idx + 5] << 16) +
1630                                 (parm_list[idx + 6] << 8) +
1631                                 (parm_list[idx + 7]);
1632         } else {
1633                 /* Long LBA Block Descriptor - sbc3r27 6.4.2.3 */
1634                 ns->mode_select_num_blocks =
1635                                 (((u64)parm_list[idx + 0]) << 56) +
1636                                 (((u64)parm_list[idx + 1]) << 48) +
1637                                 (((u64)parm_list[idx + 2]) << 40) +
1638                                 (((u64)parm_list[idx + 3]) << 32) +
1639                                 (((u64)parm_list[idx + 4]) << 24) +
1640                                 (((u64)parm_list[idx + 5]) << 16) +
1641                                 (((u64)parm_list[idx + 6]) << 8) +
1642                                 ((u64)parm_list[idx + 7]);
1643
1644                 ns->mode_select_block_len =
1645                                 (parm_list[idx + 12] << 24) +
1646                                 (parm_list[idx + 13] << 16) +
1647                                 (parm_list[idx + 14] << 8) +
1648                                 (parm_list[idx + 15]);
1649         }
1650 }
1651
1652 static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1653                                         u8 *mode_page, u8 page_code)
1654 {
1655         int res = SNTI_TRANSLATION_SUCCESS;
1656         int nvme_sc;
1657         struct nvme_dev *dev = ns->dev;
1658         unsigned dword11;
1659
1660         switch (page_code) {
1661         case MODE_PAGE_CACHING:
1662                 dword11 = ((mode_page[2] & CACHING_MODE_PAGE_WCE_MASK) ? 1 : 0);
1663                 nvme_sc = nvme_set_features(dev, NVME_FEAT_VOLATILE_WC, dword11,
1664                                             0, NULL);
1665                 res = nvme_trans_status_code(hdr, nvme_sc);
1666                 if (res)
1667                         break;
1668                 if (nvme_sc) {
1669                         res = nvme_sc;
1670                         break;
1671                 }
1672                 break;
1673         case MODE_PAGE_CONTROL:
1674                 break;
1675         case MODE_PAGE_POWER_CONDITION:
1676                 /* Verify the OS is not trying to set timers */
1677                 if ((mode_page[2] & 0x01) != 0 || (mode_page[3] & 0x0F) != 0) {
1678                         res = nvme_trans_completion(hdr,
1679                                                 SAM_STAT_CHECK_CONDITION,
1680                                                 ILLEGAL_REQUEST,
1681                                                 SCSI_ASC_INVALID_PARAMETER,
1682                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1683                         if (!res)
1684                                 res = SNTI_INTERNAL_ERROR;
1685                         break;
1686                 }
1687                 break;
1688         default:
1689                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1690                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1691                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1692                 if (!res)
1693                         res = SNTI_INTERNAL_ERROR;
1694                 break;
1695         }
1696
1697         return res;
1698 }
1699
1700 static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1701                                         u8 *cmd, u16 parm_list_len, u8 pf,
1702                                         u8 sp, u8 cdb10)
1703 {
1704         int res = SNTI_TRANSLATION_SUCCESS;
1705         u8 *parm_list;
1706         u16 bd_len;
1707         u8 llbaa = 0;
1708         u16 index, saved_index;
1709         u8 page_code;
1710         u16 mp_size;
1711
1712         /* Get parm list from data-in/out buffer */
1713         parm_list = kmalloc(parm_list_len, GFP_KERNEL);
1714         if (parm_list == NULL) {
1715                 res = -ENOMEM;
1716                 goto out;
1717         }
1718
1719         res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);
1720         if (res != SNTI_TRANSLATION_SUCCESS)
1721                 goto out_mem;
1722
1723         nvme_trans_modesel_get_bd_len(parm_list, cdb10, &bd_len, &llbaa);
1724         index = (cdb10) ? (MODE_SELECT_10_MPH_SIZE) : (MODE_SELECT_6_MPH_SIZE);
1725
1726         if (bd_len != 0) {
1727                 /* Block Descriptors present, parse */
1728                 nvme_trans_modesel_save_bd(ns, parm_list, index, bd_len, llbaa);
1729                 index += bd_len;
1730         }
1731         saved_index = index;
1732
1733         /* Multiple mode pages may be present; iterate through all */
1734         /* In 1st Iteration, don't do NVME Command, only check for CDB errors */
1735         do {
1736                 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1737                 mp_size = parm_list[index + 1] + 2;
1738                 if ((page_code != MODE_PAGE_CACHING) &&
1739                     (page_code != MODE_PAGE_CONTROL) &&
1740                     (page_code != MODE_PAGE_POWER_CONDITION)) {
1741                         res = nvme_trans_completion(hdr,
1742                                                 SAM_STAT_CHECK_CONDITION,
1743                                                 ILLEGAL_REQUEST,
1744                                                 SCSI_ASC_INVALID_CDB,
1745                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1746                         goto out_mem;
1747                 }
1748                 index += mp_size;
1749         } while (index < parm_list_len);
1750
1751         /* In 2nd Iteration, do the NVME Commands */
1752         index = saved_index;
1753         do {
1754                 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1755                 mp_size = parm_list[index + 1] + 2;
1756                 res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],
1757                                                                 page_code);
1758                 if (res != SNTI_TRANSLATION_SUCCESS)
1759                         break;
1760                 index += mp_size;
1761         } while (index < parm_list_len);
1762
1763  out_mem:
1764         kfree(parm_list);
1765  out:
1766         return res;
1767 }
1768
1769 /* Format Unit Helper Functions */
1770
1771 static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
1772                                              struct sg_io_hdr *hdr)
1773 {
1774         int res = SNTI_TRANSLATION_SUCCESS;
1775         int nvme_sc;
1776         struct nvme_dev *dev = ns->dev;
1777         dma_addr_t dma_addr;
1778         void *mem;
1779         struct nvme_id_ns *id_ns;
1780         u8 flbas;
1781
1782         /*
1783          * SCSI Expects a MODE SELECT would have been issued prior to
1784          * a FORMAT UNIT, and the block size and number would be used
1785          * from the block descriptor in it. If a MODE SELECT had not
1786          * been issued, FORMAT shall use the current values for both.
1787          */
1788
1789         if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
1790                 mem = dma_alloc_coherent(&dev->pci_dev->dev,
1791                         sizeof(struct nvme_id_ns), &dma_addr, GFP_KERNEL);
1792                 if (mem == NULL) {
1793                         res = -ENOMEM;
1794                         goto out;
1795                 }
1796                 /* nvme ns identify */
1797                 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1798                 res = nvme_trans_status_code(hdr, nvme_sc);
1799                 if (res)
1800                         goto out_dma;
1801                 if (nvme_sc) {
1802                         res = nvme_sc;
1803                         goto out_dma;
1804                 }
1805                 id_ns = mem;
1806
1807                 if (ns->mode_select_num_blocks == 0)
1808                         ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
1809                 if (ns->mode_select_block_len == 0) {
1810                         flbas = (id_ns->flbas) & 0x0F;
1811                         ns->mode_select_block_len =
1812                                                 (1 << (id_ns->lbaf[flbas].ds));
1813                 }
1814  out_dma:
1815                 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1816                                   mem, dma_addr);
1817         }
1818  out:
1819         return res;
1820 }
1821
1822 static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
1823                                         u8 format_prot_info, u8 *nvme_pf_code)
1824 {
1825         int res = SNTI_TRANSLATION_SUCCESS;
1826         u8 *parm_list;
1827         u8 pf_usage, pf_code;
1828
1829         parm_list = kmalloc(len, GFP_KERNEL);
1830         if (parm_list == NULL) {
1831                 res = -ENOMEM;
1832                 goto out;
1833         }
1834         res = nvme_trans_copy_from_user(hdr, parm_list, len);
1835         if (res != SNTI_TRANSLATION_SUCCESS)
1836                 goto out_mem;
1837
1838         if ((parm_list[FORMAT_UNIT_IMMED_OFFSET] &
1839                                 FORMAT_UNIT_IMMED_MASK) != 0) {
1840                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1841                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1842                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1843                 goto out_mem;
1844         }
1845
1846         if (len == FORMAT_UNIT_LONG_PARM_LIST_LEN &&
1847             (parm_list[FORMAT_UNIT_PROT_INT_OFFSET] & 0x0F) != 0) {
1848                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1849                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1850                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1851                 goto out_mem;
1852         }
1853         pf_usage = parm_list[FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET] &
1854                         FORMAT_UNIT_PROT_FIELD_USAGE_MASK;
1855         pf_code = (pf_usage << 2) | format_prot_info;
1856         switch (pf_code) {
1857         case 0:
1858                 *nvme_pf_code = 0;
1859                 break;
1860         case 2:
1861                 *nvme_pf_code = 1;
1862                 break;
1863         case 3:
1864                 *nvme_pf_code = 2;
1865                 break;
1866         case 7:
1867                 *nvme_pf_code = 3;
1868                 break;
1869         default:
1870                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1871                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1872                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1873                 break;
1874         }
1875
1876  out_mem:
1877         kfree(parm_list);
1878  out:
1879         return res;
1880 }
1881
1882 static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1883                                    u8 prot_info)
1884 {
1885         int res = SNTI_TRANSLATION_SUCCESS;
1886         int nvme_sc;
1887         struct nvme_dev *dev = ns->dev;
1888         dma_addr_t dma_addr;
1889         void *mem;
1890         struct nvme_id_ns *id_ns;
1891         u8 i;
1892         u8 flbas, nlbaf;
1893         u8 selected_lbaf = 0xFF;
1894         u32 cdw10 = 0;
1895         struct nvme_command c;
1896
1897         /* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
1898         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1899                                                         &dma_addr, GFP_KERNEL);
1900         if (mem == NULL) {
1901                 res = -ENOMEM;
1902                 goto out;
1903         }
1904         /* nvme ns identify */
1905         nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1906         res = nvme_trans_status_code(hdr, nvme_sc);
1907         if (res)
1908                 goto out_dma;
1909         if (nvme_sc) {
1910                 res = nvme_sc;
1911                 goto out_dma;
1912         }
1913         id_ns = mem;
1914         flbas = (id_ns->flbas) & 0x0F;
1915         nlbaf = id_ns->nlbaf;
1916
1917         for (i = 0; i < nlbaf; i++) {
1918                 if (ns->mode_select_block_len == (1 << (id_ns->lbaf[i].ds))) {
1919                         selected_lbaf = i;
1920                         break;
1921                 }
1922         }
1923         if (selected_lbaf > 0x0F) {
1924                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1925                                 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1926                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1927         }
1928         if (ns->mode_select_num_blocks != le64_to_cpu(id_ns->ncap)) {
1929                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1930                                 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1931                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1932         }
1933
1934         cdw10 |= prot_info << 5;
1935         cdw10 |= selected_lbaf & 0x0F;
1936         memset(&c, 0, sizeof(c));
1937         c.format.opcode = nvme_admin_format_nvm;
1938         c.format.nsid = cpu_to_le32(ns->ns_id);
1939         c.format.cdw10 = cpu_to_le32(cdw10);
1940
1941         nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
1942         res = nvme_trans_status_code(hdr, nvme_sc);
1943         if (res)
1944                 goto out_dma;
1945         if (nvme_sc)
1946                 res = nvme_sc;
1947
1948  out_dma:
1949         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
1950                           dma_addr);
1951  out:
1952         return res;
1953 }
1954
1955 /* Read/Write Helper Functions */
1956
1957 static inline void nvme_trans_get_io_cdb6(u8 *cmd,
1958                                         struct nvme_trans_io_cdb *cdb_info)
1959 {
1960         cdb_info->fua = 0;
1961         cdb_info->prot_info = 0;
1962         cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_6_CDB_LBA_OFFSET) &
1963                                         IO_6_CDB_LBA_MASK;
1964         cdb_info->xfer_len = GET_U8_FROM_CDB(cmd, IO_6_CDB_TX_LEN_OFFSET);
1965
1966         /* sbc3r27 sec 5.32 - TRANSFER LEN of 0 implies a 256 Block transfer */
1967         if (cdb_info->xfer_len == 0)
1968                 cdb_info->xfer_len = IO_6_DEFAULT_TX_LEN;
1969 }
1970
1971 static inline void nvme_trans_get_io_cdb10(u8 *cmd,
1972                                         struct nvme_trans_io_cdb *cdb_info)
1973 {
1974         cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_10_CDB_FUA_OFFSET) &
1975                                         IO_CDB_FUA_MASK;
1976         cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_10_CDB_WP_OFFSET) &
1977                                         IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
1978         cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_10_CDB_LBA_OFFSET);
1979         cdb_info->xfer_len = GET_U16_FROM_CDB(cmd, IO_10_CDB_TX_LEN_OFFSET);
1980 }
1981
1982 static inline void nvme_trans_get_io_cdb12(u8 *cmd,
1983                                         struct nvme_trans_io_cdb *cdb_info)
1984 {
1985         cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_12_CDB_FUA_OFFSET) &
1986                                         IO_CDB_FUA_MASK;
1987         cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_12_CDB_WP_OFFSET) &
1988                                         IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
1989         cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_12_CDB_LBA_OFFSET);
1990         cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_12_CDB_TX_LEN_OFFSET);
1991 }
1992
1993 static inline void nvme_trans_get_io_cdb16(u8 *cmd,
1994                                         struct nvme_trans_io_cdb *cdb_info)
1995 {
1996         cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_16_CDB_FUA_OFFSET) &
1997                                         IO_CDB_FUA_MASK;
1998         cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_16_CDB_WP_OFFSET) &
1999                                         IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
2000         cdb_info->lba = GET_U64_FROM_CDB(cmd, IO_16_CDB_LBA_OFFSET);
2001         cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_16_CDB_TX_LEN_OFFSET);
2002 }
2003
2004 static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,
2005                                         struct nvme_trans_io_cdb *cdb_info,
2006                                         u32 max_blocks)
2007 {
2008         /* If using iovecs, send one nvme command per vector */
2009         if (hdr->iovec_count > 0)
2010                 return hdr->iovec_count;
2011         else if (cdb_info->xfer_len > max_blocks)
2012                 return ((cdb_info->xfer_len - 1) / max_blocks) + 1;
2013         else
2014                 return 1;
2015 }
2016
2017 static u16 nvme_trans_io_get_control(struct nvme_ns *ns,
2018                                         struct nvme_trans_io_cdb *cdb_info)
2019 {
2020         u16 control = 0;
2021
2022         /* When Protection information support is added, implement here */
2023
2024         if (cdb_info->fua > 0)
2025                 control |= NVME_RW_FUA;
2026
2027         return control;
2028 }
2029
2030 static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2031                                 struct nvme_trans_io_cdb *cdb_info, u8 is_write)
2032 {
2033         int res = SNTI_TRANSLATION_SUCCESS;
2034         int nvme_sc;
2035         struct nvme_dev *dev = ns->dev;
2036         u32 num_cmds;
2037         struct nvme_iod *iod;
2038         u64 unit_len;
2039         u64 unit_num_blocks;    /* Number of blocks to xfer in each nvme cmd */
2040         u32 retcode;
2041         u32 i = 0;
2042         u64 nvme_offset = 0;
2043         void __user *next_mapping_addr;
2044         struct nvme_command c;
2045         u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
2046         u16 control;
2047         u32 max_blocks = nvme_block_nr(ns, dev->max_hw_sectors);
2048
2049         num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
2050
2051         /*
2052          * This loop handles two cases.
2053          * First, when an SGL is used in the form of an iovec list:
2054          *   - Use iov_base as the next mapping address for the nvme command_id
2055          *   - Use iov_len as the data transfer length for the command.
2056          * Second, when we have a single buffer
2057          *   - If larger than max_blocks, split into chunks, offset
2058          *        each nvme command accordingly.
2059          */
2060         for (i = 0; i < num_cmds; i++) {
2061                 memset(&c, 0, sizeof(c));
2062                 if (hdr->iovec_count > 0) {
2063                         struct sg_iovec sgl;
2064
2065                         retcode = copy_from_user(&sgl, hdr->dxferp +
2066                                         i * sizeof(struct sg_iovec),
2067                                         sizeof(struct sg_iovec));
2068                         if (retcode)
2069                                 return -EFAULT;
2070                         unit_len = sgl.iov_len;
2071                         unit_num_blocks = unit_len >> ns->lba_shift;
2072                         next_mapping_addr = sgl.iov_base;
2073                 } else {
2074                         unit_num_blocks = min((u64)max_blocks,
2075                                         (cdb_info->xfer_len - nvme_offset));
2076                         unit_len = unit_num_blocks << ns->lba_shift;
2077                         next_mapping_addr = hdr->dxferp +
2078                                         ((1 << ns->lba_shift) * nvme_offset);
2079                 }
2080
2081                 c.rw.opcode = opcode;
2082                 c.rw.nsid = cpu_to_le32(ns->ns_id);
2083                 c.rw.slba = cpu_to_le64(cdb_info->lba + nvme_offset);
2084                 c.rw.length = cpu_to_le16(unit_num_blocks - 1);
2085                 control = nvme_trans_io_get_control(ns, cdb_info);
2086                 c.rw.control = cpu_to_le16(control);
2087
2088                 iod = nvme_map_user_pages(dev,
2089                         (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2090                         (unsigned long)next_mapping_addr, unit_len);
2091                 if (IS_ERR(iod)) {
2092                         res = PTR_ERR(iod);
2093                         goto out;
2094                 }
2095                 retcode = nvme_setup_prps(dev, &c.common, iod, unit_len,
2096                                                         GFP_KERNEL);
2097                 if (retcode != unit_len) {
2098                         nvme_unmap_user_pages(dev,
2099                                 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2100                                 iod);
2101                         nvme_free_iod(dev, iod);
2102                         res = -ENOMEM;
2103                         goto out;
2104                 }
2105
2106                 nvme_offset += unit_num_blocks;
2107
2108                 nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);
2109                 if (nvme_sc != NVME_SC_SUCCESS) {
2110                         nvme_unmap_user_pages(dev,
2111                                 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2112                                 iod);
2113                         nvme_free_iod(dev, iod);
2114                         res = nvme_trans_status_code(hdr, nvme_sc);
2115                         goto out;
2116                 }
2117                 nvme_unmap_user_pages(dev,
2118                                 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2119                                 iod);
2120                 nvme_free_iod(dev, iod);
2121         }
2122         res = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
2123
2124  out:
2125         return res;
2126 }
2127
2128
2129 /* SCSI Command Translation Functions */
2130
2131 static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,
2132                                                         u8 *cmd)
2133 {
2134         int res = SNTI_TRANSLATION_SUCCESS;
2135         struct nvme_trans_io_cdb cdb_info;
2136         u8 opcode = cmd[0];
2137         u64 xfer_bytes;
2138         u64 sum_iov_len = 0;
2139         struct sg_iovec sgl;
2140         int i;
2141         size_t not_copied;
2142
2143         /* Extract Fields from CDB */
2144         switch (opcode) {
2145         case WRITE_6:
2146         case READ_6:
2147                 nvme_trans_get_io_cdb6(cmd, &cdb_info);
2148                 break;
2149         case WRITE_10:
2150         case READ_10:
2151                 nvme_trans_get_io_cdb10(cmd, &cdb_info);
2152                 break;
2153         case WRITE_12:
2154         case READ_12:
2155                 nvme_trans_get_io_cdb12(cmd, &cdb_info);
2156                 break;
2157         case WRITE_16:
2158         case READ_16:
2159                 nvme_trans_get_io_cdb16(cmd, &cdb_info);
2160                 break;
2161         default:
2162                 /* Will never really reach here */
2163                 res = SNTI_INTERNAL_ERROR;
2164                 goto out;
2165         }
2166
2167         /* Calculate total length of transfer (in bytes) */
2168         if (hdr->iovec_count > 0) {
2169                 for (i = 0; i < hdr->iovec_count; i++) {
2170                         not_copied = copy_from_user(&sgl, hdr->dxferp +
2171                                                 i * sizeof(struct sg_iovec),
2172                                                 sizeof(struct sg_iovec));
2173                         if (not_copied)
2174                                 return -EFAULT;
2175                         sum_iov_len += sgl.iov_len;
2176                         /* IO vector sizes should be multiples of block size */
2177                         if (sgl.iov_len % (1 << ns->lba_shift) != 0) {
2178                                 res = nvme_trans_completion(hdr,
2179                                                 SAM_STAT_CHECK_CONDITION,
2180                                                 ILLEGAL_REQUEST,
2181                                                 SCSI_ASC_INVALID_PARAMETER,
2182                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2183                                 goto out;
2184                         }
2185                 }
2186         } else {
2187                 sum_iov_len = hdr->dxfer_len;
2188         }
2189
2190         /* As Per sg ioctl howto, if the lengths differ, use the lower one */
2191         xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);
2192
2193         /* If block count and actual data buffer size dont match, error out */
2194         if (xfer_bytes != (cdb_info.xfer_len << ns->lba_shift)) {
2195                 res = -EINVAL;
2196                 goto out;
2197         }
2198
2199         /* Check for 0 length transfer - it is not illegal */
2200         if (cdb_info.xfer_len == 0)
2201                 goto out;
2202
2203         /* Send NVMe IO Command(s) */
2204         res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);
2205         if (res != SNTI_TRANSLATION_SUCCESS)
2206                 goto out;
2207
2208  out:
2209         return res;
2210 }
2211
2212 static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2213                                                         u8 *cmd)
2214 {
2215         int res = SNTI_TRANSLATION_SUCCESS;
2216         u8 evpd;
2217         u8 page_code;
2218         int alloc_len;
2219         u8 *inq_response;
2220
2221         evpd = GET_INQ_EVPD_BIT(cmd);
2222         page_code = GET_INQ_PAGE_CODE(cmd);
2223         alloc_len = GET_INQ_ALLOC_LENGTH(cmd);
2224
2225         inq_response = kmalloc(STANDARD_INQUIRY_LENGTH, GFP_KERNEL);
2226         if (inq_response == NULL) {
2227                 res = -ENOMEM;
2228                 goto out_mem;
2229         }
2230
2231         if (evpd == 0) {
2232                 if (page_code == INQ_STANDARD_INQUIRY_PAGE) {
2233                         res = nvme_trans_standard_inquiry_page(ns, hdr,
2234                                                 inq_response, alloc_len);
2235                 } else {
2236                         res = nvme_trans_completion(hdr,
2237                                                 SAM_STAT_CHECK_CONDITION,
2238                                                 ILLEGAL_REQUEST,
2239                                                 SCSI_ASC_INVALID_CDB,
2240                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2241                 }
2242         } else {
2243                 switch (page_code) {
2244                 case VPD_SUPPORTED_PAGES:
2245                         res = nvme_trans_supported_vpd_pages(ns, hdr,
2246                                                 inq_response, alloc_len);
2247                         break;
2248                 case VPD_SERIAL_NUMBER:
2249                         res = nvme_trans_unit_serial_page(ns, hdr, inq_response,
2250                                                                 alloc_len);
2251                         break;
2252                 case VPD_DEVICE_IDENTIFIERS:
2253                         res = nvme_trans_device_id_page(ns, hdr, inq_response,
2254                                                                 alloc_len);
2255                         break;
2256                 case VPD_EXTENDED_INQUIRY:
2257                         res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
2258                         break;
2259                 case VPD_BLOCK_DEV_CHARACTERISTICS:
2260                         res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
2261                         break;
2262                 default:
2263                         res = nvme_trans_completion(hdr,
2264                                                 SAM_STAT_CHECK_CONDITION,
2265                                                 ILLEGAL_REQUEST,
2266                                                 SCSI_ASC_INVALID_CDB,
2267                                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2268                         break;
2269                 }
2270         }
2271         kfree(inq_response);
2272  out_mem:
2273         return res;
2274 }
2275
2276 static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2277                                                         u8 *cmd)
2278 {
2279         int res = SNTI_TRANSLATION_SUCCESS;
2280         u16 alloc_len;
2281         u8 sp;
2282         u8 pc;
2283         u8 page_code;
2284
2285         sp = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_SP_OFFSET);
2286         if (sp != LOG_SENSE_CDB_SP_NOT_ENABLED) {
2287                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2288                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2289                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2290                 goto out;
2291         }
2292         pc = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_PC_OFFSET);
2293         page_code = pc & LOG_SENSE_CDB_PAGE_CODE_MASK;
2294         pc = (pc & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT;
2295         if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) {
2296                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2297                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2298                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2299                 goto out;
2300         }
2301         alloc_len = GET_U16_FROM_CDB(cmd, LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET);
2302         switch (page_code) {
2303         case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE:
2304                 res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);
2305                 break;
2306         case LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE:
2307                 res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);
2308                 break;
2309         case LOG_PAGE_TEMPERATURE_PAGE:
2310                 res = nvme_trans_log_temperature(ns, hdr, alloc_len);
2311                 break;
2312         default:
2313                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2314                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2315                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2316                 break;
2317         }
2318
2319  out:
2320         return res;
2321 }
2322
2323 static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2324                                                         u8 *cmd)
2325 {
2326         int res = SNTI_TRANSLATION_SUCCESS;
2327         u8 cdb10 = 0;
2328         u16 parm_list_len;
2329         u8 page_format;
2330         u8 save_pages;
2331
2332         page_format = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_PAGE_FORMAT_OFFSET);
2333         page_format &= MODE_SELECT_CDB_PAGE_FORMAT_MASK;
2334
2335         save_pages = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_SAVE_PAGES_OFFSET);
2336         save_pages &= MODE_SELECT_CDB_SAVE_PAGES_MASK;
2337
2338         if (GET_OPCODE(cmd) == MODE_SELECT) {
2339                 parm_list_len = GET_U8_FROM_CDB(cmd,
2340                                 MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET);
2341         } else {
2342                 parm_list_len = GET_U16_FROM_CDB(cmd,
2343                                 MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET);
2344                 cdb10 = 1;
2345         }
2346
2347         if (parm_list_len != 0) {
2348                 /*
2349                  * According to SPC-4 r24, a paramter list length field of 0
2350                  * shall not be considered an error
2351                  */
2352                 res = nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
2353                                                 page_format, save_pages, cdb10);
2354         }
2355
2356         return res;
2357 }
2358
2359 static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2360                                                         u8 *cmd)
2361 {
2362         int res = SNTI_TRANSLATION_SUCCESS;
2363         u16 alloc_len;
2364         u8 cdb10 = 0;
2365         u8 page_code;
2366         u8 pc;
2367
2368         if (GET_OPCODE(cmd) == MODE_SENSE) {
2369                 alloc_len = GET_U8_FROM_CDB(cmd, MODE_SENSE6_ALLOC_LEN_OFFSET);
2370         } else {
2371                 alloc_len = GET_U16_FROM_CDB(cmd,
2372                                                 MODE_SENSE10_ALLOC_LEN_OFFSET);
2373                 cdb10 = 1;
2374         }
2375
2376         pc = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CONTROL_OFFSET) &
2377                                                 MODE_SENSE_PAGE_CONTROL_MASK;
2378         if (pc != MODE_SENSE_PC_CURRENT_VALUES) {
2379                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2380                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2381                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2382                 goto out;
2383         }
2384
2385         page_code = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CODE_OFFSET) &
2386                                         MODE_SENSE_PAGE_CODE_MASK;
2387         switch (page_code) {
2388         case MODE_PAGE_CACHING:
2389                 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2390                                                 cdb10,
2391                                                 &nvme_trans_fill_caching_page,
2392                                                 MODE_PAGE_CACHING_LEN);
2393                 break;
2394         case MODE_PAGE_CONTROL:
2395                 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2396                                                 cdb10,
2397                                                 &nvme_trans_fill_control_page,
2398                                                 MODE_PAGE_CONTROL_LEN);
2399                 break;
2400         case MODE_PAGE_POWER_CONDITION:
2401                 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2402                                                 cdb10,
2403                                                 &nvme_trans_fill_pow_cnd_page,
2404                                                 MODE_PAGE_POW_CND_LEN);
2405                 break;
2406         case MODE_PAGE_INFO_EXCEP:
2407                 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2408                                                 cdb10,
2409                                                 &nvme_trans_fill_inf_exc_page,
2410                                                 MODE_PAGE_INF_EXC_LEN);
2411                 break;
2412         case MODE_PAGE_RETURN_ALL:
2413                 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2414                                                 cdb10,
2415                                                 &nvme_trans_fill_all_pages,
2416                                                 MODE_PAGE_ALL_LEN);
2417                 break;
2418         default:
2419                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2420                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2421                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2422                 break;
2423         }
2424
2425  out:
2426         return res;
2427 }
2428
2429 static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2430                                                         u8 *cmd)
2431 {
2432         int res = SNTI_TRANSLATION_SUCCESS;
2433         int nvme_sc;
2434         u32 alloc_len = READ_CAP_10_RESP_SIZE;
2435         u32 resp_size = READ_CAP_10_RESP_SIZE;
2436         u32 xfer_len;
2437         u8 cdb16;
2438         struct nvme_dev *dev = ns->dev;
2439         dma_addr_t dma_addr;
2440         void *mem;
2441         struct nvme_id_ns *id_ns;
2442         u8 *response;
2443
2444         cdb16 = IS_READ_CAP_16(cmd);
2445         if (cdb16) {
2446                 alloc_len = GET_READ_CAP_16_ALLOC_LENGTH(cmd);
2447                 resp_size = READ_CAP_16_RESP_SIZE;
2448         }
2449
2450         mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
2451                                                         &dma_addr, GFP_KERNEL);
2452         if (mem == NULL) {
2453                 res = -ENOMEM;
2454                 goto out;
2455         }
2456         /* nvme ns identify */
2457         nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
2458         res = nvme_trans_status_code(hdr, nvme_sc);
2459         if (res)
2460                 goto out_dma;
2461         if (nvme_sc) {
2462                 res = nvme_sc;
2463                 goto out_dma;
2464         }
2465         id_ns = mem;
2466
2467         response = kzalloc(resp_size, GFP_KERNEL);
2468         if (response == NULL) {
2469                 res = -ENOMEM;
2470                 goto out_dma;
2471         }
2472         nvme_trans_fill_read_cap(response, id_ns, cdb16);
2473
2474         xfer_len = min(alloc_len, resp_size);
2475         res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2476
2477         kfree(response);
2478  out_dma:
2479         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
2480                           dma_addr);
2481  out:
2482         return res;
2483 }
2484
2485 static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2486                                                         u8 *cmd)
2487 {
2488         int res = SNTI_TRANSLATION_SUCCESS;
2489         int nvme_sc;
2490         u32 alloc_len, xfer_len, resp_size;
2491         u8 select_report;
2492         u8 *response;
2493         struct nvme_dev *dev = ns->dev;
2494         dma_addr_t dma_addr;
2495         void *mem;
2496         struct nvme_id_ctrl *id_ctrl;
2497         u32 ll_length, lun_id;
2498         u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
2499         __be32 tmp_len;
2500
2501         alloc_len = GET_REPORT_LUNS_ALLOC_LENGTH(cmd);
2502         select_report = GET_U8_FROM_CDB(cmd, REPORT_LUNS_SR_OFFSET);
2503
2504         if ((select_report != ALL_LUNS_RETURNED) &&
2505             (select_report != ALL_WELL_KNOWN_LUNS_RETURNED) &&
2506             (select_report != RESTRICTED_LUNS_RETURNED)) {
2507                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2508                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2509                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2510                 goto out;
2511         } else {
2512                 /* NVMe Controller Identify */
2513                 mem = dma_alloc_coherent(&dev->pci_dev->dev,
2514                                         sizeof(struct nvme_id_ctrl),
2515                                         &dma_addr, GFP_KERNEL);
2516                 if (mem == NULL) {
2517                         res = -ENOMEM;
2518                         goto out;
2519                 }
2520                 nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
2521                 res = nvme_trans_status_code(hdr, nvme_sc);
2522                 if (res)
2523                         goto out_dma;
2524                 if (nvme_sc) {
2525                         res = nvme_sc;
2526                         goto out_dma;
2527                 }
2528                 id_ctrl = mem;
2529                 ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
2530                 resp_size = ll_length + LUN_DATA_HEADER_SIZE;
2531
2532                 if (alloc_len < resp_size) {
2533                         res = nvme_trans_completion(hdr,
2534                                         SAM_STAT_CHECK_CONDITION,
2535                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2536                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2537                         goto out_dma;
2538                 }
2539
2540                 response = kzalloc(resp_size, GFP_KERNEL);
2541                 if (response == NULL) {
2542                         res = -ENOMEM;
2543                         goto out_dma;
2544                 }
2545
2546                 /* The first LUN ID will always be 0 per the SAM spec */
2547                 for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
2548                         /*
2549                          * Set the LUN Id and then increment to the next LUN
2550                          * location in the parameter data.
2551                          */
2552                         __be64 tmp_id = cpu_to_be64(lun_id);
2553                         memcpy(&response[lun_id_offset], &tmp_id, sizeof(u64));
2554                         lun_id_offset += LUN_ENTRY_SIZE;
2555                 }
2556                 tmp_len = cpu_to_be32(ll_length);
2557                 memcpy(response, &tmp_len, sizeof(u32));
2558         }
2559
2560         xfer_len = min(alloc_len, resp_size);
2561         res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2562
2563         kfree(response);
2564  out_dma:
2565         dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
2566                           dma_addr);
2567  out:
2568         return res;
2569 }
2570
2571 static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2572                                                         u8 *cmd)
2573 {
2574         int res = SNTI_TRANSLATION_SUCCESS;
2575         u8 alloc_len, xfer_len, resp_size;
2576         u8 desc_format;
2577         u8 *response;
2578
2579         alloc_len = GET_REQUEST_SENSE_ALLOC_LENGTH(cmd);
2580         desc_format = GET_U8_FROM_CDB(cmd, REQUEST_SENSE_DESC_OFFSET);
2581         desc_format &= REQUEST_SENSE_DESC_MASK;
2582
2583         resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
2584                                         (FIXED_FMT_SENSE_DATA_SIZE));
2585         response = kzalloc(resp_size, GFP_KERNEL);
2586         if (response == NULL) {
2587                 res = -ENOMEM;
2588                 goto out;
2589         }
2590
2591         if (desc_format == DESCRIPTOR_FORMAT_SENSE_DATA_TYPE) {
2592                 /* Descriptor Format Sense Data */
2593                 response[0] = DESC_FORMAT_SENSE_DATA;
2594                 response[1] = NO_SENSE;
2595                 /* TODO How is LOW POWER CONDITION ON handled? (byte 2) */
2596                 response[2] = SCSI_ASC_NO_SENSE;
2597                 response[3] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2598                 /* SDAT_OVFL = 0 | Additional Sense Length = 0 */
2599         } else {
2600                 /* Fixed Format Sense Data */
2601                 response[0] = FIXED_SENSE_DATA;
2602                 /* Byte 1 = Obsolete */
2603                 response[2] = NO_SENSE; /* FM, EOM, ILI, SDAT_OVFL = 0 */
2604                 /* Bytes 3-6 - Information - set to zero */
2605                 response[7] = FIXED_SENSE_DATA_ADD_LENGTH;
2606                 /* Bytes 8-11 - Cmd Specific Information - set to zero */
2607                 response[12] = SCSI_ASC_NO_SENSE;
2608                 response[13] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2609                 /* Byte 14 = Field Replaceable Unit Code = 0 */
2610                 /* Bytes 15-17 - SKSV=0; Sense Key Specific = 0 */
2611         }
2612
2613         xfer_len = min(alloc_len, resp_size);
2614         res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2615
2616         kfree(response);
2617  out:
2618         return res;
2619 }
2620
2621 static int nvme_trans_security_protocol(struct nvme_ns *ns,
2622                                         struct sg_io_hdr *hdr,
2623                                         u8 *cmd)
2624 {
2625         return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2626                                 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2627                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2628 }
2629
2630 static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2631                                                         u8 *cmd)
2632 {
2633         int res = SNTI_TRANSLATION_SUCCESS;
2634         int nvme_sc;
2635         struct nvme_command c;
2636         u8 immed, pcmod, pc, no_flush, start;
2637
2638         immed = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_IMMED_OFFSET);
2639         pcmod = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET);
2640         pc = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_OFFSET);
2641         no_flush = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_NO_FLUSH_OFFSET);
2642         start = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_START_OFFSET);
2643
2644         immed &= START_STOP_UNIT_CDB_IMMED_MASK;
2645         pcmod &= START_STOP_UNIT_CDB_POWER_COND_MOD_MASK;
2646         pc = (pc & START_STOP_UNIT_CDB_POWER_COND_MASK) >> NIBBLE_SHIFT;
2647         no_flush &= START_STOP_UNIT_CDB_NO_FLUSH_MASK;
2648         start &= START_STOP_UNIT_CDB_START_MASK;
2649
2650         if (immed != 0) {
2651                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2652                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2653                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2654         } else {
2655                 if (no_flush == 0) {
2656                         /* Issue NVME FLUSH command prior to START STOP UNIT */
2657                         memset(&c, 0, sizeof(c));
2658                         c.common.opcode = nvme_cmd_flush;
2659                         c.common.nsid = cpu_to_le32(ns->ns_id);
2660
2661                         nvme_sc = nvme_submit_io_cmd(ns->dev, &c, NULL);
2662                         res = nvme_trans_status_code(hdr, nvme_sc);
2663                         if (res)
2664                                 goto out;
2665                         if (nvme_sc) {
2666                                 res = nvme_sc;
2667                                 goto out;
2668                         }
2669                 }
2670                 /* Setup the expected power state transition */
2671                 res = nvme_trans_power_state(ns, hdr, pc, pcmod, start);
2672         }
2673
2674  out:
2675         return res;
2676 }
2677
2678 static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
2679                                         struct sg_io_hdr *hdr, u8 *cmd)
2680 {
2681         int res = SNTI_TRANSLATION_SUCCESS;
2682         int nvme_sc;
2683         struct nvme_command c;
2684
2685         memset(&c, 0, sizeof(c));
2686         c.common.opcode = nvme_cmd_flush;
2687         c.common.nsid = cpu_to_le32(ns->ns_id);
2688
2689         nvme_sc = nvme_submit_io_cmd(ns->dev, &c, NULL);
2690
2691         res = nvme_trans_status_code(hdr, nvme_sc);
2692         if (res)
2693                 goto out;
2694         if (nvme_sc)
2695                 res = nvme_sc;
2696
2697  out:
2698         return res;
2699 }
2700
2701 static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2702                                                         u8 *cmd)
2703 {
2704         int res = SNTI_TRANSLATION_SUCCESS;
2705         u8 parm_hdr_len = 0;
2706         u8 nvme_pf_code = 0;
2707         u8 format_prot_info, long_list, format_data;
2708
2709         format_prot_info = GET_U8_FROM_CDB(cmd,
2710                                 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET);
2711         long_list = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_LONG_LIST_OFFSET);
2712         format_data = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET);
2713
2714         format_prot_info = (format_prot_info &
2715                                 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK) >>
2716                                 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT;
2717         long_list &= FORMAT_UNIT_CDB_LONG_LIST_MASK;
2718         format_data &= FORMAT_UNIT_CDB_FORMAT_DATA_MASK;
2719
2720         if (format_data != 0) {
2721                 if (format_prot_info != 0) {
2722                         if (long_list == 0)
2723                                 parm_hdr_len = FORMAT_UNIT_SHORT_PARM_LIST_LEN;
2724                         else
2725                                 parm_hdr_len = FORMAT_UNIT_LONG_PARM_LIST_LEN;
2726                 }
2727         } else if (format_data == 0 && format_prot_info != 0) {
2728                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2729                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2730                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2731                 goto out;
2732         }
2733
2734         /* Get parm header from data-in/out buffer */
2735         /*
2736          * According to the translation spec, the only fields in the parameter
2737          * list we are concerned with are in the header. So allocate only that.
2738          */
2739         if (parm_hdr_len > 0) {
2740                 res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,
2741                                         format_prot_info, &nvme_pf_code);
2742                 if (res != SNTI_TRANSLATION_SUCCESS)
2743                         goto out;
2744         }
2745
2746         /* Attempt to activate any previously downloaded firmware image */
2747         res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw, 0, 0, 0);
2748
2749         /* Determine Block size and count and send format command */
2750         res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
2751         if (res != SNTI_TRANSLATION_SUCCESS)
2752                 goto out;
2753
2754         res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);
2755
2756  out:
2757         return res;
2758 }
2759
2760 static int nvme_trans_test_unit_ready(struct nvme_ns *ns,
2761                                         struct sg_io_hdr *hdr,
2762                                         u8 *cmd)
2763 {
2764         int res = SNTI_TRANSLATION_SUCCESS;
2765         struct nvme_dev *dev = ns->dev;
2766
2767         if (!(readl(&dev->bar->csts) & NVME_CSTS_RDY))
2768                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2769                                             NOT_READY, SCSI_ASC_LUN_NOT_READY,
2770                                             SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2771         else
2772                 res = nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
2773
2774         return res;
2775 }
2776
2777 static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2778                                                         u8 *cmd)
2779 {
2780         int res = SNTI_TRANSLATION_SUCCESS;
2781         u32 buffer_offset, parm_list_length;
2782         u8 buffer_id, mode;
2783
2784         parm_list_length =
2785                 GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET);
2786         if (parm_list_length % BYTES_TO_DWORDS != 0) {
2787                 /* NVMe expects Firmware file to be a whole number of DWORDS */
2788                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2789                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2790                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2791                 goto out;
2792         }
2793         buffer_id = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_ID_OFFSET);
2794         if (buffer_id > NVME_MAX_FIRMWARE_SLOT) {
2795                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2796                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2797                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2798                 goto out;
2799         }
2800         mode = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_MODE_OFFSET) &
2801                                                 WRITE_BUFFER_CDB_MODE_MASK;
2802         buffer_offset =
2803                 GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET);
2804
2805         switch (mode) {
2806         case DOWNLOAD_SAVE_ACTIVATE:
2807                 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
2808                                                 parm_list_length, buffer_offset,
2809                                                 buffer_id);
2810                 if (res != SNTI_TRANSLATION_SUCCESS)
2811                         goto out;
2812                 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
2813                                                 parm_list_length, buffer_offset,
2814                                                 buffer_id);
2815                 break;
2816         case DOWNLOAD_SAVE_DEFER_ACTIVATE:
2817                 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
2818                                                 parm_list_length, buffer_offset,
2819                                                 buffer_id);
2820                 break;
2821         case ACTIVATE_DEFERRED_MICROCODE:
2822                 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
2823                                                 parm_list_length, buffer_offset,
2824                                                 buffer_id);
2825                 break;
2826         default:
2827                 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2828                                         ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2829                                         SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2830                 break;
2831         }
2832
2833  out:
2834         return res;
2835 }
2836
2837 struct scsi_unmap_blk_desc {
2838         __be64  slba;
2839         __be32  nlb;
2840         u32     resv;
2841 };
2842
2843 struct scsi_unmap_parm_list {
2844         __be16  unmap_data_len;
2845         __be16  unmap_blk_desc_data_len;
2846         u32     resv;
2847         struct scsi_unmap_blk_desc desc[0];
2848 };
2849
2850 static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2851                                                         u8 *cmd)
2852 {
2853         struct nvme_dev *dev = ns->dev;
2854         struct scsi_unmap_parm_list *plist;
2855         struct nvme_dsm_range *range;
2856         struct nvme_command c;
2857         int i, nvme_sc, res = -ENOMEM;
2858         u16 ndesc, list_len;
2859         dma_addr_t dma_addr;
2860
2861         list_len = GET_U16_FROM_CDB(cmd, UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET);
2862         if (!list_len)
2863                 return -EINVAL;
2864
2865         plist = kmalloc(list_len, GFP_KERNEL);
2866         if (!plist)
2867                 return -ENOMEM;
2868
2869         res = nvme_trans_copy_from_user(hdr, plist, list_len);
2870         if (res != SNTI_TRANSLATION_SUCCESS)
2871                 goto out;
2872
2873         ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
2874         if (!ndesc || ndesc > 256) {
2875                 res = -EINVAL;
2876                 goto out;
2877         }
2878
2879         range = dma_alloc_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
2880                                                         &dma_addr, GFP_KERNEL);
2881         if (!range)
2882                 goto out;
2883
2884         for (i = 0; i < ndesc; i++) {
2885                 range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));
2886                 range[i].slba = cpu_to_le64(be64_to_cpu(plist->desc[i].slba));
2887                 range[i].cattr = 0;
2888         }
2889
2890         memset(&c, 0, sizeof(c));
2891         c.dsm.opcode = nvme_cmd_dsm;
2892         c.dsm.nsid = cpu_to_le32(ns->ns_id);
2893         c.dsm.prp1 = cpu_to_le64(dma_addr);
2894         c.dsm.nr = cpu_to_le32(ndesc - 1);
2895         c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
2896
2897         nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);
2898         res = nvme_trans_status_code(hdr, nvme_sc);
2899
2900         dma_free_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
2901                                                         range, dma_addr);
2902  out:
2903         kfree(plist);
2904         return res;
2905 }
2906
2907 static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
2908 {
2909         u8 cmd[BLK_MAX_CDB];
2910         int retcode;
2911         unsigned int opcode;
2912
2913         if (hdr->cmdp == NULL)
2914                 return -EMSGSIZE;
2915         if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
2916                 return -EFAULT;
2917
2918         opcode = cmd[0];
2919
2920         switch (opcode) {
2921         case READ_6:
2922         case READ_10:
2923         case READ_12:
2924         case READ_16:
2925                 retcode = nvme_trans_io(ns, hdr, 0, cmd);
2926                 break;
2927         case WRITE_6:
2928         case WRITE_10:
2929         case WRITE_12:
2930         case WRITE_16:
2931                 retcode = nvme_trans_io(ns, hdr, 1, cmd);
2932                 break;
2933         case INQUIRY:
2934                 retcode = nvme_trans_inquiry(ns, hdr, cmd);
2935                 break;
2936         case LOG_SENSE:
2937                 retcode = nvme_trans_log_sense(ns, hdr, cmd);
2938                 break;
2939         case MODE_SELECT:
2940         case MODE_SELECT_10:
2941                 retcode = nvme_trans_mode_select(ns, hdr, cmd);
2942                 break;
2943         case MODE_SENSE:
2944         case MODE_SENSE_10:
2945                 retcode = nvme_trans_mode_sense(ns, hdr, cmd);
2946                 break;
2947         case READ_CAPACITY:
2948                 retcode = nvme_trans_read_capacity(ns, hdr, cmd);
2949                 break;
2950         case SERVICE_ACTION_IN:
2951                 if (IS_READ_CAP_16(cmd))
2952                         retcode = nvme_trans_read_capacity(ns, hdr, cmd);
2953                 else
2954                         goto out;
2955                 break;
2956         case REPORT_LUNS:
2957                 retcode = nvme_trans_report_luns(ns, hdr, cmd);
2958                 break;
2959         case REQUEST_SENSE:
2960                 retcode = nvme_trans_request_sense(ns, hdr, cmd);
2961                 break;
2962         case SECURITY_PROTOCOL_IN:
2963         case SECURITY_PROTOCOL_OUT:
2964                 retcode = nvme_trans_security_protocol(ns, hdr, cmd);
2965                 break;
2966         case START_STOP:
2967                 retcode = nvme_trans_start_stop(ns, hdr, cmd);
2968                 break;
2969         case SYNCHRONIZE_CACHE:
2970                 retcode = nvme_trans_synchronize_cache(ns, hdr, cmd);
2971                 break;
2972         case FORMAT_UNIT:
2973                 retcode = nvme_trans_format_unit(ns, hdr, cmd);
2974                 break;
2975         case TEST_UNIT_READY:
2976                 retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);
2977                 break;
2978         case WRITE_BUFFER:
2979                 retcode = nvme_trans_write_buffer(ns, hdr, cmd);
2980                 break;
2981         case UNMAP:
2982                 retcode = nvme_trans_unmap(ns, hdr, cmd);
2983                 break;
2984         default:
2985  out:
2986                 retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2987                                 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2988                                 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2989                 break;
2990         }
2991         return retcode;
2992 }
2993
2994 int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr)
2995 {
2996         struct sg_io_hdr hdr;
2997         int retcode;
2998
2999         if (!capable(CAP_SYS_ADMIN))
3000                 return -EACCES;
3001         if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))
3002                 return -EFAULT;
3003         if (hdr.interface_id != 'S')
3004                 return -EINVAL;
3005         if (hdr.cmd_len > BLK_MAX_CDB)
3006                 return -EINVAL;
3007
3008         retcode = nvme_scsi_translate(ns, &hdr);
3009         if (retcode < 0)
3010                 return retcode;
3011         if (retcode > 0)
3012                 retcode = SNTI_TRANSLATION_SUCCESS;
3013         if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
3014                 return -EFAULT;
3015
3016         return retcode;
3017 }
3018
3019 #ifdef CONFIG_COMPAT
3020 typedef struct sg_io_hdr32 {
3021         compat_int_t interface_id;      /* [i] 'S' for SCSI generic (required) */
3022         compat_int_t dxfer_direction;   /* [i] data transfer direction  */
3023         unsigned char cmd_len;          /* [i] SCSI command length ( <= 16 bytes) */
3024         unsigned char mx_sb_len;                /* [i] max length to write to sbp */
3025         unsigned short iovec_count;     /* [i] 0 implies no scatter gather */
3026         compat_uint_t dxfer_len;                /* [i] byte count of data transfer */
3027         compat_uint_t dxferp;           /* [i], [*io] points to data transfer memory
3028                                               or scatter gather list */
3029         compat_uptr_t cmdp;             /* [i], [*i] points to command to perform */
3030         compat_uptr_t sbp;              /* [i], [*o] points to sense_buffer memory */
3031         compat_uint_t timeout;          /* [i] MAX_UINT->no timeout (unit: millisec) */
3032         compat_uint_t flags;            /* [i] 0 -> default, see SG_FLAG... */
3033         compat_int_t pack_id;           /* [i->o] unused internally (normally) */
3034         compat_uptr_t usr_ptr;          /* [i->o] unused internally */
3035         unsigned char status;           /* [o] scsi status */
3036         unsigned char masked_status;    /* [o] shifted, masked scsi status */
3037         unsigned char msg_status;               /* [o] messaging level data (optional) */
3038         unsigned char sb_len_wr;                /* [o] byte count actually written to sbp */
3039         unsigned short host_status;     /* [o] errors from host adapter */
3040         unsigned short driver_status;   /* [o] errors from software driver */
3041         compat_int_t resid;             /* [o] dxfer_len - actual_transferred */
3042         compat_uint_t duration;         /* [o] time taken by cmd (unit: millisec) */
3043         compat_uint_t info;             /* [o] auxiliary information */
3044 } sg_io_hdr32_t;  /* 64 bytes long (on sparc32) */
3045
3046 typedef struct sg_iovec32 {
3047         compat_uint_t iov_base;
3048         compat_uint_t iov_len;
3049 } sg_iovec32_t;
3050
3051 static int sg_build_iovec(sg_io_hdr_t __user *sgio, void __user *dxferp, u16 iovec_count)
3052 {
3053         sg_iovec_t __user *iov = (sg_iovec_t __user *) (sgio + 1);
3054         sg_iovec32_t __user *iov32 = dxferp;
3055         int i;
3056
3057         for (i = 0; i < iovec_count; i++) {
3058                 u32 base, len;
3059
3060                 if (get_user(base, &iov32[i].iov_base) ||
3061                     get_user(len, &iov32[i].iov_len) ||
3062                     put_user(compat_ptr(base), &iov[i].iov_base) ||
3063                     put_user(len, &iov[i].iov_len))
3064                         return -EFAULT;
3065         }
3066
3067         if (put_user(iov, &sgio->dxferp))
3068                 return -EFAULT;
3069         return 0;
3070 }
3071
3072 int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg)
3073 {
3074         sg_io_hdr32_t __user *sgio32 = (sg_io_hdr32_t __user *)arg;
3075         sg_io_hdr_t __user *sgio;
3076         u16 iovec_count;
3077         u32 data;
3078         void __user *dxferp;
3079         int err;
3080         int interface_id;
3081
3082         if (get_user(interface_id, &sgio32->interface_id))
3083                 return -EFAULT;
3084         if (interface_id != 'S')
3085                 return -EINVAL;
3086
3087         if (get_user(iovec_count, &sgio32->iovec_count))
3088                 return -EFAULT;
3089
3090         {
3091                 void __user *top = compat_alloc_user_space(0);
3092                 void __user *new = compat_alloc_user_space(sizeof(sg_io_hdr_t) +
3093                                        (iovec_count * sizeof(sg_iovec_t)));
3094                 if (new > top)
3095                         return -EINVAL;
3096
3097                 sgio = new;
3098         }
3099
3100         /* Ok, now construct.  */
3101         if (copy_in_user(&sgio->interface_id, &sgio32->interface_id,
3102                          (2 * sizeof(int)) +
3103                          (2 * sizeof(unsigned char)) +
3104                          (1 * sizeof(unsigned short)) +
3105                          (1 * sizeof(unsigned int))))
3106                 return -EFAULT;
3107
3108         if (get_user(data, &sgio32->dxferp))
3109                 return -EFAULT;
3110         dxferp = compat_ptr(data);
3111         if (iovec_count) {
3112                 if (sg_build_iovec(sgio, dxferp, iovec_count))
3113                         return -EFAULT;
3114         } else {
3115                 if (put_user(dxferp, &sgio->dxferp))
3116                         return -EFAULT;
3117         }
3118
3119         {
3120                 unsigned char __user *cmdp;
3121                 unsigned char __user *sbp;
3122
3123                 if (get_user(data, &sgio32->cmdp))
3124                         return -EFAULT;
3125                 cmdp = compat_ptr(data);
3126
3127                 if (get_user(data, &sgio32->sbp))
3128                         return -EFAULT;
3129                 sbp = compat_ptr(data);
3130
3131                 if (put_user(cmdp, &sgio->cmdp) ||
3132                     put_user(sbp, &sgio->sbp))
3133                         return -EFAULT;
3134         }
3135
3136         if (copy_in_user(&sgio->timeout, &sgio32->timeout,
3137                          3 * sizeof(int)))
3138                 return -EFAULT;
3139
3140         if (get_user(data, &sgio32->usr_ptr))
3141                 return -EFAULT;
3142         if (put_user(compat_ptr(data), &sgio->usr_ptr))
3143                 return -EFAULT;
3144
3145         err = nvme_sg_io(ns, sgio);
3146         if (err >= 0) {
3147                 void __user *datap;
3148
3149                 if (copy_in_user(&sgio32->pack_id, &sgio->pack_id,
3150                                  sizeof(int)) ||
3151                     get_user(datap, &sgio->usr_ptr) ||
3152                     put_user((u32)(unsigned long)datap,
3153                              &sgio32->usr_ptr) ||
3154                     copy_in_user(&sgio32->status, &sgio->status,
3155                                  (4 * sizeof(unsigned char)) +
3156                                  (2 * sizeof(unsigned short)) +
3157                                  (3 * sizeof(int))))
3158                         err = -EFAULT;
3159         }
3160
3161         return err;
3162 }
3163 #endif
3164
3165 int nvme_sg_get_version_num(int __user *ip)
3166 {
3167         return put_user(sg_version_num, ip);
3168 }