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android_kernel_xiaomi_sm8350/drivers/block/nvme-scsi.c
Linus Torvalds 6a398a3ef4 Merge branch 'for-4.2/drivers' of git://git.kernel.dk/linux-block 
Pull block driver updates from Jens Axboe:
 "This contains:

   - a few race fixes for null_blk, from Akinobu Mita.

   - a series of fixes for mtip32xx, from Asai Thambi and Selvan Mani at
     Micron.

   - NVMe:
        * Fix for missing error return on allocation failure, from Axel
          Lin.

        * Code consolidation and cleanups from Christoph.

        * Memory barrier addition, syncing queue count and queue
          pointers. From Jon Derrick.

        * Various fixes from Keith, an addition to support user
          issue reset from sysfs or ioctl, and automatic namespace
          rescan.

        * Fix from Matias, avoiding losing some request flags when
          marking the request failfast.

   - small cleanups and sparse fixups for ps3vram.  From Geert
     Uytterhoeven and Geoff Lavand.

   - s390/dasd dead code removal, from Jarod Wilson.

   - a set of fixes and optimizations for loop, from Ming Lei.

   - conversion to blkdev_reread_part() of loop, dasd, ndb.  From Ming
     Lei.

   - updates to cciss.  From Tomas Henzl"

* 'for-4.2/drivers' of git://git.kernel.dk/linux-block: (44 commits)
  mtip32xx: Fix accessing freed memory
  block: nvme-scsi: Catch kcalloc failure
  NVMe: Fix IO for extended metadata formats
  nvme: don't overwrite req->cmd_flags on sync cmd
  mtip32xx: increase wait time for hba reset
  mtip32xx: fix minor number
  mtip32xx: remove unnecessary sleep in mtip_ftl_rebuild_poll()
  mtip32xx: fix crash on surprise removal of the drive
  mtip32xx: Abort I/O during secure erase operation
  mtip32xx: fix incorrectly setting MTIP_DDF_SEC_LOCK_BIT
  mtip32xx: remove unused variable 'port->allocated'
  mtip32xx: fix rmmod issue
  MAINTAINERS: Update ps3vram block driver
  block/ps3vram: Remove obsolete reference to MTD
  block/ps3vram: Fix sparse warnings
  NVMe: Automatic namespace rescan
  NVMe: Memory barrier before queue_count is incremented
  NVMe: add sysfs and ioctl controller reset
  null_blk: restart request processing on completion handler
  null_blk: prevent timer handler running on a different CPU where started
  ...
2015-06-25 15:12:50 -07:00

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/*
* NVM Express device driver
* Copyright (c) 2011-2014, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
/*
* Refer to the SCSI-NVMe Translation spec for details on how
* each command is translated.
*/
#include <linux/nvme.h>
#include <linux/bio.h>
#include <linux/bitops.h>
#include <linux/blkdev.h>
#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/idr.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kdev_t.h>
#include <linux/kthread.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/poison.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <asm/unaligned.h>
#include <scsi/sg.h>
#include <scsi/scsi.h>
static int sg_version_num = 30534; /* 2 digits for each component */
/* VPD Page Codes */
#define VPD_SUPPORTED_PAGES 0x00
#define VPD_SERIAL_NUMBER 0x80
#define VPD_DEVICE_IDENTIFIERS 0x83
#define VPD_EXTENDED_INQUIRY 0x86
#define VPD_BLOCK_LIMITS 0xB0
#define VPD_BLOCK_DEV_CHARACTERISTICS 0xB1
/* format unit paramter list offsets */
#define FORMAT_UNIT_SHORT_PARM_LIST_LEN 4
#define FORMAT_UNIT_LONG_PARM_LIST_LEN 8
#define FORMAT_UNIT_PROT_INT_OFFSET 3
#define FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET 0
#define FORMAT_UNIT_PROT_FIELD_USAGE_MASK 0x07
/* Misc. defines */
#define FIXED_SENSE_DATA 0x70
#define DESC_FORMAT_SENSE_DATA 0x72
#define FIXED_SENSE_DATA_ADD_LENGTH 10
#define LUN_ENTRY_SIZE 8
#define LUN_DATA_HEADER_SIZE 8
#define ALL_LUNS_RETURNED 0x02
#define ALL_WELL_KNOWN_LUNS_RETURNED 0x01
#define RESTRICTED_LUNS_RETURNED 0x00
#define NVME_POWER_STATE_START_VALID 0x00
#define NVME_POWER_STATE_ACTIVE 0x01
#define NVME_POWER_STATE_IDLE 0x02
#define NVME_POWER_STATE_STANDBY 0x03
#define NVME_POWER_STATE_LU_CONTROL 0x07
#define POWER_STATE_0 0
#define POWER_STATE_1 1
#define POWER_STATE_2 2
#define POWER_STATE_3 3
#define DOWNLOAD_SAVE_ACTIVATE 0x05
#define DOWNLOAD_SAVE_DEFER_ACTIVATE 0x0E
#define ACTIVATE_DEFERRED_MICROCODE 0x0F
#define FORMAT_UNIT_IMMED_MASK 0x2
#define FORMAT_UNIT_IMMED_OFFSET 1
#define KELVIN_TEMP_FACTOR 273
#define FIXED_FMT_SENSE_DATA_SIZE 18
#define DESC_FMT_SENSE_DATA_SIZE 8
/* SCSI/NVMe defines and bit masks */
#define INQ_STANDARD_INQUIRY_PAGE 0x00
#define INQ_SUPPORTED_VPD_PAGES_PAGE 0x00
#define INQ_UNIT_SERIAL_NUMBER_PAGE 0x80
#define INQ_DEVICE_IDENTIFICATION_PAGE 0x83
#define INQ_EXTENDED_INQUIRY_DATA_PAGE 0x86
#define INQ_BDEV_LIMITS_PAGE 0xB0
#define INQ_BDEV_CHARACTERISTICS_PAGE 0xB1
#define INQ_SERIAL_NUMBER_LENGTH 0x14
#define INQ_NUM_SUPPORTED_VPD_PAGES 6
#define VERSION_SPC_4 0x06
#define ACA_UNSUPPORTED 0
#define STANDARD_INQUIRY_LENGTH 36
#define ADDITIONAL_STD_INQ_LENGTH 31
#define EXTENDED_INQUIRY_DATA_PAGE_LENGTH 0x3C
#define RESERVED_FIELD 0
/* Mode Sense/Select defines */
#define MODE_PAGE_INFO_EXCEP 0x1C
#define MODE_PAGE_CACHING 0x08
#define MODE_PAGE_CONTROL 0x0A
#define MODE_PAGE_POWER_CONDITION 0x1A
#define MODE_PAGE_RETURN_ALL 0x3F
#define MODE_PAGE_BLK_DES_LEN 0x08
#define MODE_PAGE_LLBAA_BLK_DES_LEN 0x10
#define MODE_PAGE_CACHING_LEN 0x14
#define MODE_PAGE_CONTROL_LEN 0x0C
#define MODE_PAGE_POW_CND_LEN 0x28
#define MODE_PAGE_INF_EXC_LEN 0x0C
#define MODE_PAGE_ALL_LEN 0x54
#define MODE_SENSE6_MPH_SIZE 4
#define MODE_SENSE_PAGE_CONTROL_MASK 0xC0
#define MODE_SENSE_PAGE_CODE_OFFSET 2
#define MODE_SENSE_PAGE_CODE_MASK 0x3F
#define MODE_SENSE_LLBAA_MASK 0x10
#define MODE_SENSE_LLBAA_SHIFT 4
#define MODE_SENSE_DBD_MASK 8
#define MODE_SENSE_DBD_SHIFT 3
#define MODE_SENSE10_MPH_SIZE 8
#define MODE_SELECT_CDB_PAGE_FORMAT_MASK 0x10
#define MODE_SELECT_CDB_SAVE_PAGES_MASK 0x1
#define MODE_SELECT_6_BD_OFFSET 3
#define MODE_SELECT_10_BD_OFFSET 6
#define MODE_SELECT_10_LLBAA_OFFSET 4
#define MODE_SELECT_10_LLBAA_MASK 1
#define MODE_SELECT_6_MPH_SIZE 4
#define MODE_SELECT_10_MPH_SIZE 8
#define CACHING_MODE_PAGE_WCE_MASK 0x04
#define MODE_SENSE_BLK_DESC_ENABLED 0
#define MODE_SENSE_BLK_DESC_COUNT 1
#define MODE_SELECT_PAGE_CODE_MASK 0x3F
#define SHORT_DESC_BLOCK 8
#define LONG_DESC_BLOCK 16
#define MODE_PAGE_POW_CND_LEN_FIELD 0x26
#define MODE_PAGE_INF_EXC_LEN_FIELD 0x0A
#define MODE_PAGE_CACHING_LEN_FIELD 0x12
#define MODE_PAGE_CONTROL_LEN_FIELD 0x0A
#define MODE_SENSE_PC_CURRENT_VALUES 0
/* Log Sense defines */
#define LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE 0x00
#define LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH 0x07
#define LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE 0x2F
#define LOG_PAGE_TEMPERATURE_PAGE 0x0D
#define LOG_SENSE_CDB_SP_NOT_ENABLED 0
#define LOG_SENSE_CDB_PC_MASK 0xC0
#define LOG_SENSE_CDB_PC_SHIFT 6
#define LOG_SENSE_CDB_PC_CUMULATIVE_VALUES 1
#define LOG_SENSE_CDB_PAGE_CODE_MASK 0x3F
#define REMAINING_INFO_EXCP_PAGE_LENGTH 0x8
#define LOG_INFO_EXCP_PAGE_LENGTH 0xC
#define REMAINING_TEMP_PAGE_LENGTH 0xC
#define LOG_TEMP_PAGE_LENGTH 0x10
#define LOG_TEMP_UNKNOWN 0xFF
#define SUPPORTED_LOG_PAGES_PAGE_LENGTH 0x3
/* Read Capacity defines */
#define READ_CAP_10_RESP_SIZE 8
#define READ_CAP_16_RESP_SIZE 32
/* NVMe Namespace and Command Defines */
#define BYTES_TO_DWORDS 4
#define NVME_MAX_FIRMWARE_SLOT 7
/* Report LUNs defines */
#define REPORT_LUNS_FIRST_LUN_OFFSET 8
/* SCSI ADDITIONAL SENSE Codes */
#define SCSI_ASC_NO_SENSE 0x00
#define SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT 0x03
#define SCSI_ASC_LUN_NOT_READY 0x04
#define SCSI_ASC_WARNING 0x0B
#define SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED 0x10
#define SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED 0x10
#define SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED 0x10
#define SCSI_ASC_UNRECOVERED_READ_ERROR 0x11
#define SCSI_ASC_MISCOMPARE_DURING_VERIFY 0x1D
#define SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID 0x20
#define SCSI_ASC_ILLEGAL_COMMAND 0x20
#define SCSI_ASC_ILLEGAL_BLOCK 0x21
#define SCSI_ASC_INVALID_CDB 0x24
#define SCSI_ASC_INVALID_LUN 0x25
#define SCSI_ASC_INVALID_PARAMETER 0x26
#define SCSI_ASC_FORMAT_COMMAND_FAILED 0x31
#define SCSI_ASC_INTERNAL_TARGET_FAILURE 0x44
/* SCSI ADDITIONAL SENSE Code Qualifiers */
#define SCSI_ASCQ_CAUSE_NOT_REPORTABLE 0x00
#define SCSI_ASCQ_FORMAT_COMMAND_FAILED 0x01
#define SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED 0x01
#define SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED 0x02
#define SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED 0x03
#define SCSI_ASCQ_FORMAT_IN_PROGRESS 0x04
#define SCSI_ASCQ_POWER_LOSS_EXPECTED 0x08
#define SCSI_ASCQ_INVALID_LUN_ID 0x09
/* copied from drivers/usb/gadget/function/storage_common.h */
static inline u32 get_unaligned_be24(u8 *buf)
{
return 0xffffff & (u32) get_unaligned_be32(buf - 1);
}
/* Struct to gather data that needs to be extracted from a SCSI CDB.
Not conforming to any particular CDB variant, but compatible with all. */
struct nvme_trans_io_cdb {
u8 fua;
u8 prot_info;
u64 lba;
u32 xfer_len;
};
/* Internal Helper Functions */
/* Copy data to userspace memory */
static int nvme_trans_copy_to_user(struct sg_io_hdr *hdr, void *from,
unsigned long n)
{
int i;
void *index = from;
size_t remaining = n;
size_t xfer_len;
if (hdr->iovec_count > 0) {
struct sg_iovec sgl;
for (i = 0; i < hdr->iovec_count; i++) {
if (copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec)))
return -EFAULT;
xfer_len = min(remaining, sgl.iov_len);
if (copy_to_user(sgl.iov_base, index, xfer_len))
return -EFAULT;
index += xfer_len;
remaining -= xfer_len;
if (remaining == 0)
break;
}
return 0;
}
if (copy_to_user(hdr->dxferp, from, n))
return -EFAULT;
return 0;
}
/* Copy data from userspace memory */
static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,
unsigned long n)
{
int i;
void *index = to;
size_t remaining = n;
size_t xfer_len;
if (hdr->iovec_count > 0) {
struct sg_iovec sgl;
for (i = 0; i < hdr->iovec_count; i++) {
if (copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec)))
return -EFAULT;
xfer_len = min(remaining, sgl.iov_len);
if (copy_from_user(index, sgl.iov_base, xfer_len))
return -EFAULT;
index += xfer_len;
remaining -= xfer_len;
if (remaining == 0)
break;
}
return 0;
}
if (copy_from_user(to, hdr->dxferp, n))
return -EFAULT;
return 0;
}
/* Status/Sense Buffer Writeback */
static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,
u8 asc, u8 ascq)
{
u8 xfer_len;
u8 resp[DESC_FMT_SENSE_DATA_SIZE];
if (scsi_status_is_good(status)) {
hdr->status = SAM_STAT_GOOD;
hdr->masked_status = GOOD;
hdr->host_status = DID_OK;
hdr->driver_status = DRIVER_OK;
hdr->sb_len_wr = 0;
} else {
hdr->status = status;
hdr->masked_status = status >> 1;
hdr->host_status = DID_OK;
hdr->driver_status = DRIVER_OK;
memset(resp, 0, DESC_FMT_SENSE_DATA_SIZE);
resp[0] = DESC_FORMAT_SENSE_DATA;
resp[1] = sense_key;
resp[2] = asc;
resp[3] = ascq;
xfer_len = min_t(u8, hdr->mx_sb_len, DESC_FMT_SENSE_DATA_SIZE);
hdr->sb_len_wr = xfer_len;
if (copy_to_user(hdr->sbp, resp, xfer_len) > 0)
return -EFAULT;
}
return 0;
}
/*
* Take a status code from a lowlevel routine, and if it was a positive NVMe
* error code update the sense data based on it. In either case the passed
* in value is returned again, unless an -EFAULT from copy_to_user overrides
* it.
*/
static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)
{
u8 status, sense_key, asc, ascq;
int res;
/* For non-nvme (Linux) errors, simply return the error code */
if (nvme_sc < 0)
return nvme_sc;
/* Mask DNR, More, and reserved fields */
switch (nvme_sc & 0x7FF) {
/* Generic Command Status */
case NVME_SC_SUCCESS:
status = SAM_STAT_GOOD;
sense_key = NO_SENSE;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_INVALID_OPCODE:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_ILLEGAL_COMMAND;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_INVALID_FIELD:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_INVALID_CDB;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_DATA_XFER_ERROR:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_POWER_LOSS:
status = SAM_STAT_TASK_ABORTED;
sense_key = ABORTED_COMMAND;
asc = SCSI_ASC_WARNING;
ascq = SCSI_ASCQ_POWER_LOSS_EXPECTED;
break;
case NVME_SC_INTERNAL:
status = SAM_STAT_CHECK_CONDITION;
sense_key = HARDWARE_ERROR;
asc = SCSI_ASC_INTERNAL_TARGET_FAILURE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_ABORT_REQ:
status = SAM_STAT_TASK_ABORTED;
sense_key = ABORTED_COMMAND;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_ABORT_QUEUE:
status = SAM_STAT_TASK_ABORTED;
sense_key = ABORTED_COMMAND;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_FUSED_FAIL:
status = SAM_STAT_TASK_ABORTED;
sense_key = ABORTED_COMMAND;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_FUSED_MISSING:
status = SAM_STAT_TASK_ABORTED;
sense_key = ABORTED_COMMAND;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_INVALID_NS:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
ascq = SCSI_ASCQ_INVALID_LUN_ID;
break;
case NVME_SC_LBA_RANGE:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_ILLEGAL_BLOCK;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_CAP_EXCEEDED:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_NS_NOT_READY:
status = SAM_STAT_CHECK_CONDITION;
sense_key = NOT_READY;
asc = SCSI_ASC_LUN_NOT_READY;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
/* Command Specific Status */
case NVME_SC_INVALID_FORMAT:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_FORMAT_COMMAND_FAILED;
ascq = SCSI_ASCQ_FORMAT_COMMAND_FAILED;
break;
case NVME_SC_BAD_ATTRIBUTES:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_INVALID_CDB;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
/* Media Errors */
case NVME_SC_WRITE_FAULT:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_READ_ERROR:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_UNRECOVERED_READ_ERROR;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_GUARD_CHECK:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED;
ascq = SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED;
break;
case NVME_SC_APPTAG_CHECK:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED;
ascq = SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED;
break;
case NVME_SC_REFTAG_CHECK:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MEDIUM_ERROR;
asc = SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED;
ascq = SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED;
break;
case NVME_SC_COMPARE_FAILED:
status = SAM_STAT_CHECK_CONDITION;
sense_key = MISCOMPARE;
asc = SCSI_ASC_MISCOMPARE_DURING_VERIFY;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
case NVME_SC_ACCESS_DENIED:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
ascq = SCSI_ASCQ_INVALID_LUN_ID;
break;
/* Unspecified/Default */
case NVME_SC_CMDID_CONFLICT:
case NVME_SC_CMD_SEQ_ERROR:
case NVME_SC_CQ_INVALID:
case NVME_SC_QID_INVALID:
case NVME_SC_QUEUE_SIZE:
case NVME_SC_ABORT_LIMIT:
case NVME_SC_ABORT_MISSING:
case NVME_SC_ASYNC_LIMIT:
case NVME_SC_FIRMWARE_SLOT:
case NVME_SC_FIRMWARE_IMAGE:
case NVME_SC_INVALID_VECTOR:
case NVME_SC_INVALID_LOG_PAGE:
default:
status = SAM_STAT_CHECK_CONDITION;
sense_key = ILLEGAL_REQUEST;
asc = SCSI_ASC_NO_SENSE;
ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
break;
}
res = nvme_trans_completion(hdr, status, sense_key, asc, ascq);
return res ? res : nvme_sc;
}
/* INQUIRY Helper Functions */
static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *inq_response,
int alloc_len)
{
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id_ns;
int res;
int nvme_sc;
int xfer_len;
u8 resp_data_format = 0x02;
u8 protect;
u8 cmdque = 0x01 << 1;
u8 fw_offset = sizeof(dev->firmware_rev);
/* nvme ns identify - use DPS value for PROTECT field */
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
if (id_ns->dps)
protect = 0x01;
else
protect = 0;
kfree(id_ns);
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[2] = VERSION_SPC_4;
inq_response[3] = resp_data_format; /*normaca=0 | hisup=0 */
inq_response[4] = ADDITIONAL_STD_INQ_LENGTH;
inq_response[5] = protect; /* sccs=0 | acc=0 | tpgs=0 | pc3=0 */
inq_response[7] = cmdque; /* wbus16=0 | sync=0 | vs=0 */
strncpy(&inq_response[8], "NVMe ", 8);
strncpy(&inq_response[16], dev->model, 16);
while (dev->firmware_rev[fw_offset - 1] == ' ' && fw_offset > 4)
fw_offset--;
fw_offset -= 4;
strncpy(&inq_response[32], dev->firmware_rev + fw_offset, 4);
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *inq_response,
int alloc_len)
{
int xfer_len;
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[1] = INQ_SUPPORTED_VPD_PAGES_PAGE; /* Page Code */
inq_response[3] = INQ_NUM_SUPPORTED_VPD_PAGES; /* Page Length */
inq_response[4] = INQ_SUPPORTED_VPD_PAGES_PAGE;
inq_response[5] = INQ_UNIT_SERIAL_NUMBER_PAGE;
inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
inq_response[9] = INQ_BDEV_LIMITS_PAGE;
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_unit_serial_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *inq_response,
int alloc_len)
{
struct nvme_dev *dev = ns->dev;
int xfer_len;
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[1] = INQ_UNIT_SERIAL_NUMBER_PAGE; /* Page Code */
inq_response[3] = INQ_SERIAL_NUMBER_LENGTH; /* Page Length */
strncpy(&inq_response[4], dev->serial, INQ_SERIAL_NUMBER_LENGTH);
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *inq_response, int alloc_len)
{
struct nvme_dev *dev = ns->dev;
int res;
int nvme_sc;
int xfer_len;
__be32 tmp_id = cpu_to_be32(ns->ns_id);
memset(inq_response, 0, alloc_len);
inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE; /* Page Code */
if (readl(&dev->bar->vs) >= NVME_VS(1, 1)) {
struct nvme_id_ns *id_ns;
void *eui;
int len;
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
eui = id_ns->eui64;
len = sizeof(id_ns->eui64);
if (readl(&dev->bar->vs) >= NVME_VS(1, 2)) {
if (bitmap_empty(eui, len * 8)) {
eui = id_ns->nguid;
len = sizeof(id_ns->nguid);
}
}
if (bitmap_empty(eui, len * 8)) {
kfree(id_ns);
goto scsi_string;
}
inq_response[3] = 4 + len; /* Page Length */
/* Designation Descriptor start */
inq_response[4] = 0x01; /* Proto ID=0h | Code set=1h */
inq_response[5] = 0x02; /* PIV=0b | Asso=00b | Designator Type=2h */
inq_response[6] = 0x00; /* Rsvd */
inq_response[7] = len; /* Designator Length */
memcpy(&inq_response[8], eui, len);
kfree(id_ns);
} else {
scsi_string:
if (alloc_len < 72) {
return nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
inq_response[3] = 0x48; /* Page Length */
/* Designation Descriptor start */
inq_response[4] = 0x03; /* Proto ID=0h | Code set=3h */
inq_response[5] = 0x08; /* PIV=0b | Asso=00b | Designator Type=8h */
inq_response[6] = 0x00; /* Rsvd */
inq_response[7] = 0x44; /* Designator Length */
sprintf(&inq_response[8], "%04x", to_pci_dev(dev->dev)->vendor);
memcpy(&inq_response[12], dev->model, sizeof(dev->model));
sprintf(&inq_response[52], "%04x", tmp_id);
memcpy(&inq_response[56], dev->serial, sizeof(dev->serial));
}
xfer_len = alloc_len;
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
u8 *inq_response;
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ctrl *id_ctrl;
struct nvme_id_ns *id_ns;
int xfer_len;
u8 microcode = 0x80;
u8 spt;
u8 spt_lut[8] = {0, 0, 2, 1, 4, 6, 5, 7};
u8 grd_chk, app_chk, ref_chk, protect;
u8 uask_sup = 0x20;
u8 v_sup;
u8 luiclr = 0x01;
inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
if (inq_response == NULL)
return -ENOMEM;
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free_inq;
spt = spt_lut[id_ns->dpc & 0x07] << 3;
if (id_ns->dps)
protect = 0x01;
else
protect = 0;
kfree(id_ns);
grd_chk = protect << 2;
app_chk = protect << 1;
ref_chk = protect;
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free_inq;
v_sup = id_ctrl->vwc;
kfree(id_ctrl);
memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE; /* Page Code */
inq_response[2] = 0x00; /* Page Length MSB */
inq_response[3] = 0x3C; /* Page Length LSB */
inq_response[4] = microcode | spt | grd_chk | app_chk | ref_chk;
inq_response[5] = uask_sup;
inq_response[6] = v_sup;
inq_response[7] = luiclr;
inq_response[8] = 0;
inq_response[9] = 0;
xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free_inq:
kfree(inq_response);
return res;
}
static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *inq_response, int alloc_len)
{
__be32 max_sectors = cpu_to_be32(
nvme_block_nr(ns, queue_max_hw_sectors(ns->queue)));
__be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
__be32 discard_desc_count = cpu_to_be32(0x100);
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[1] = VPD_BLOCK_LIMITS;
inq_response[3] = 0x3c; /* Page Length */
memcpy(&inq_response[8], &max_sectors, sizeof(u32));
memcpy(&inq_response[20], &max_discard, sizeof(u32));
if (max_discard)
memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
}
static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
u8 *inq_response;
int res;
int xfer_len;
inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
if (inq_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE; /* Page Code */
inq_response[2] = 0x00; /* Page Length MSB */
inq_response[3] = 0x3C; /* Page Length LSB */
inq_response[4] = 0x00; /* Medium Rotation Rate MSB */
inq_response[5] = 0x01; /* Medium Rotation Rate LSB */
inq_response[6] = 0x00; /* Form Factor */
xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
kfree(inq_response);
out_mem:
return res;
}
/* LOG SENSE Helper Functions */
static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
int res;
int xfer_len;
u8 *log_response;
log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
/* Subpage=0x00, Page Length MSB=0 */
log_response[3] = SUPPORTED_LOG_PAGES_PAGE_LENGTH;
log_response[4] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
log_response[5] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
log_response[6] = LOG_PAGE_TEMPERATURE_PAGE;
xfer_len = min(alloc_len, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
kfree(log_response);
out_mem:
return res;
}
static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
struct sg_io_hdr *hdr, int alloc_len)
{
int res;
int xfer_len;
u8 *log_response;
struct nvme_dev *dev = ns->dev;
struct nvme_smart_log *smart_log;
u8 temp_c;
u16 temp_k;
log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL)
return -ENOMEM;
res = nvme_get_log_page(dev, &smart_log);
if (res < 0)
goto out_free_response;
if (res != NVME_SC_SUCCESS) {
temp_c = LOG_TEMP_UNKNOWN;
} else {
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c = temp_k - KELVIN_TEMP_FACTOR;
}
kfree(smart_log);
log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
/* Subpage=0x00, Page Length MSB=0 */
log_response[3] = REMAINING_INFO_EXCP_PAGE_LENGTH;
/* Informational Exceptions Log Parameter 1 Start */
/* Parameter Code=0x0000 bytes 4,5 */
log_response[6] = 0x23; /* DU=0, TSD=1, ETC=0, TMC=0, FMT_AND_LNK=11b */
log_response[7] = 0x04; /* PARAMETER LENGTH */
/* Add sense Code and qualifier = 0x00 each */
/* Use Temperature from NVMe Get Log Page, convert to C from K */
log_response[10] = temp_c;
xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
out_free_response:
kfree(log_response);
return res;
}
static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
int res;
int xfer_len;
u8 *log_response;
struct nvme_dev *dev = ns->dev;
struct nvme_smart_log *smart_log;
u32 feature_resp;
u8 temp_c_cur, temp_c_thresh;
u16 temp_k;
log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL)
return -ENOMEM;
res = nvme_get_log_page(dev, &smart_log);
if (res < 0)
goto out_free_response;
if (res != NVME_SC_SUCCESS) {
temp_c_cur = LOG_TEMP_UNKNOWN;
} else {
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
}
kfree(smart_log);
/* Get Features for Temp Threshold */
res = nvme_get_features(dev, NVME_FEAT_TEMP_THRESH, 0, 0,
&feature_resp);
if (res != NVME_SC_SUCCESS)
temp_c_thresh = LOG_TEMP_UNKNOWN;
else
temp_c_thresh = (feature_resp & 0xFFFF) - KELVIN_TEMP_FACTOR;
log_response[0] = LOG_PAGE_TEMPERATURE_PAGE;
/* Subpage=0x00, Page Length MSB=0 */
log_response[3] = REMAINING_TEMP_PAGE_LENGTH;
/* Temperature Log Parameter 1 (Temperature) Start */
/* Parameter Code = 0x0000 */
log_response[6] = 0x01; /* Format and Linking = 01b */
log_response[7] = 0x02; /* Parameter Length */
/* Use Temperature from NVMe Get Log Page, convert to C from K */
log_response[9] = temp_c_cur;
/* Temperature Log Parameter 2 (Reference Temperature) Start */
log_response[11] = 0x01; /* Parameter Code = 0x0001 */
log_response[12] = 0x01; /* Format and Linking = 01b */
log_response[13] = 0x02; /* Parameter Length */
/* Use Temperature Thresh from NVMe Get Log Page, convert to C from K */
log_response[15] = temp_c_thresh;
xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
out_free_response:
kfree(log_response);
return res;
}
/* MODE SENSE Helper Functions */
static int nvme_trans_fill_mode_parm_hdr(u8 *resp, int len, u8 cdb10, u8 llbaa,
u16 mode_data_length, u16 blk_desc_len)
{
/* Quick check to make sure I don't stomp on my own memory... */
if ((cdb10 && len < 8) || (!cdb10 && len < 4))
return -EINVAL;
if (cdb10) {
resp[0] = (mode_data_length & 0xFF00) >> 8;
resp[1] = (mode_data_length & 0x00FF);
resp[3] = 0x10 /* DPOFUA */;
resp[4] = llbaa;
resp[5] = RESERVED_FIELD;
resp[6] = (blk_desc_len & 0xFF00) >> 8;
resp[7] = (blk_desc_len & 0x00FF);
} else {
resp[0] = (mode_data_length & 0x00FF);
resp[2] = 0x10 /* DPOFUA */;
resp[3] = (blk_desc_len & 0x00FF);
}
return 0;
}
static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *resp, int len, u8 llbaa)
{
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id_ns;
u8 flbas;
u32 lba_length;
if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
return -EINVAL;
else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
return -EINVAL;
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
flbas = (id_ns->flbas) & 0x0F;
lba_length = (1 << (id_ns->lbaf[flbas].ds));
if (llbaa == 0) {
__be32 tmp_cap = cpu_to_be32(le64_to_cpu(id_ns->ncap));
/* Byte 4 is reserved */
__be32 tmp_len = cpu_to_be32(lba_length & 0x00FFFFFF);
memcpy(resp, &tmp_cap, sizeof(u32));
memcpy(&resp[4], &tmp_len, sizeof(u32));
} else {
__be64 tmp_cap = cpu_to_be64(le64_to_cpu(id_ns->ncap));
__be32 tmp_len = cpu_to_be32(lba_length);
memcpy(resp, &tmp_cap, sizeof(u64));
/* Bytes 8, 9, 10, 11 are reserved */
memcpy(&resp[12], &tmp_len, sizeof(u32));
}
kfree(id_ns);
return res;
}
static int nvme_trans_fill_control_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *resp,
int len)
{
if (len < MODE_PAGE_CONTROL_LEN)
return -EINVAL;
resp[0] = MODE_PAGE_CONTROL;
resp[1] = MODE_PAGE_CONTROL_LEN_FIELD;
resp[2] = 0x0E; /* TST=000b, TMF_ONLY=0, DPICZ=1,
* D_SENSE=1, GLTSD=1, RLEC=0 */
resp[3] = 0x12; /* Q_ALGO_MODIFIER=1h, NUAR=0, QERR=01b */
/* Byte 4: VS=0, RAC=0, UA_INT=0, SWP=0 */
resp[5] = 0x40; /* ATO=0, TAS=1, ATMPE=0, RWWP=0, AUTOLOAD=0 */
/* resp[6] and [7] are obsolete, thus zero */
resp[8] = 0xFF; /* Busy timeout period = 0xffff */
resp[9] = 0xFF;
/* Bytes 10,11: Extended selftest completion time = 0x0000 */
return 0;
}
static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr,
u8 *resp, int len)
{
int res = 0;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
u32 feature_resp;
u8 vwc;
if (len < MODE_PAGE_CACHING_LEN)
return -EINVAL;
nvme_sc = nvme_get_features(dev, NVME_FEAT_VOLATILE_WC, 0, 0,
&feature_resp);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
vwc = feature_resp & 0x00000001;
resp[0] = MODE_PAGE_CACHING;
resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
resp[2] = vwc << 2;
return 0;
}
static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *resp,
int len)
{
if (len < MODE_PAGE_POW_CND_LEN)
return -EINVAL;
resp[0] = MODE_PAGE_POWER_CONDITION;
resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
/* All other bytes are zero */
return 0;
}
static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *resp,
int len)
{
if (len < MODE_PAGE_INF_EXC_LEN)
return -EINVAL;
resp[0] = MODE_PAGE_INFO_EXCEP;
resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
resp[2] = 0x88;
/* All other bytes are zero */
return 0;
}
static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *resp, int len)
{
int res;
u16 mode_pages_offset_1 = 0;
u16 mode_pages_offset_2, mode_pages_offset_3, mode_pages_offset_4;
mode_pages_offset_2 = mode_pages_offset_1 + MODE_PAGE_CACHING_LEN;
mode_pages_offset_3 = mode_pages_offset_2 + MODE_PAGE_CONTROL_LEN;
mode_pages_offset_4 = mode_pages_offset_3 + MODE_PAGE_POW_CND_LEN;
res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],
MODE_PAGE_CACHING_LEN);
if (res)
return res;
res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
MODE_PAGE_CONTROL_LEN);
if (res)
return res;
res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
MODE_PAGE_POW_CND_LEN);
if (res)
return res;
return nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
MODE_PAGE_INF_EXC_LEN);
}
static inline int nvme_trans_get_blk_desc_len(u8 dbd, u8 llbaa)
{
if (dbd == MODE_SENSE_BLK_DESC_ENABLED) {
/* SPC-4: len = 8 x Num_of_descriptors if llbaa = 0, 16x if 1 */
return 8 * (llbaa + 1) * MODE_SENSE_BLK_DESC_COUNT;
} else {
return 0;
}
}
static int nvme_trans_mode_page_create(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *cmd,
u16 alloc_len, u8 cdb10,
int (*mode_page_fill_func)
(struct nvme_ns *,
struct sg_io_hdr *hdr, u8 *, int),
u16 mode_pages_tot_len)
{
int res;
int xfer_len;
u8 *response;
u8 dbd, llbaa;
u16 resp_size;
int mph_size;
u16 mode_pages_offset_1;
u16 blk_desc_len, blk_desc_offset, mode_data_length;
dbd = (cmd[1] & MODE_SENSE_DBD_MASK) >> MODE_SENSE_DBD_SHIFT;
llbaa = (cmd[1] & MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT;
mph_size = cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE;
blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa);
resp_size = mph_size + blk_desc_len + mode_pages_tot_len;
/* Refer spc4r34 Table 440 for calculation of Mode data Length field */
mode_data_length = 3 + (3 * cdb10) + blk_desc_len + mode_pages_tot_len;
blk_desc_offset = mph_size;
mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_mem;
}
res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
llbaa, mode_data_length, blk_desc_len);
if (res)
goto out_free;
if (blk_desc_len > 0) {
res = nvme_trans_fill_blk_desc(ns, hdr,
&response[blk_desc_offset],
blk_desc_len, llbaa);
if (res)
goto out_free;
}
res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
mode_pages_tot_len);
if (res)
goto out_free;
xfer_len = min(alloc_len, resp_size);
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
out_free:
kfree(response);
out_mem:
return res;
}
/* Read Capacity Helper Functions */
static void nvme_trans_fill_read_cap(u8 *response, struct nvme_id_ns *id_ns,
u8 cdb16)
{
u8 flbas;
u32 lba_length;
u64 rlba;
u8 prot_en;
u8 p_type_lut[4] = {0, 0, 1, 2};
__be64 tmp_rlba;
__be32 tmp_rlba_32;
__be32 tmp_len;
flbas = (id_ns->flbas) & 0x0F;
lba_length = (1 << (id_ns->lbaf[flbas].ds));
rlba = le64_to_cpup(&id_ns->nsze) - 1;
(id_ns->dps) ? (prot_en = 0x01) : (prot_en = 0);
if (!cdb16) {
if (rlba > 0xFFFFFFFF)
rlba = 0xFFFFFFFF;
tmp_rlba_32 = cpu_to_be32(rlba);
tmp_len = cpu_to_be32(lba_length);
memcpy(response, &tmp_rlba_32, sizeof(u32));
memcpy(&response[4], &tmp_len, sizeof(u32));
} else {
tmp_rlba = cpu_to_be64(rlba);
tmp_len = cpu_to_be32(lba_length);
memcpy(response, &tmp_rlba, sizeof(u64));
memcpy(&response[8], &tmp_len, sizeof(u32));
response[12] = (p_type_lut[id_ns->dps & 0x3] << 1) | prot_en;
/* P_I_Exponent = 0x0 | LBPPBE = 0x0 */
/* LBPME = 0 | LBPRZ = 0 | LALBA = 0x00 */
/* Bytes 16-31 - Reserved */
}
}
/* Start Stop Unit Helper Functions */
static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 pc, u8 pcmod, u8 start)
{
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ctrl *id_ctrl;
int lowest_pow_st; /* max npss = lowest power consumption */
unsigned ps_desired = 0;
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
kfree(id_ctrl);
switch (pc) {
case NVME_POWER_STATE_START_VALID:
/* Action unspecified if POWER CONDITION MODIFIER != 0 */
if (pcmod == 0 && start == 0x1)
ps_desired = POWER_STATE_0;
if (pcmod == 0 && start == 0x0)
ps_desired = lowest_pow_st;
break;
case NVME_POWER_STATE_ACTIVE:
/* Action unspecified if POWER CONDITION MODIFIER != 0 */
if (pcmod == 0)
ps_desired = POWER_STATE_0;
break;
case NVME_POWER_STATE_IDLE:
/* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
if (pcmod == 0x0)
ps_desired = POWER_STATE_1;
else if (pcmod == 0x1)
ps_desired = POWER_STATE_2;
else if (pcmod == 0x2)
ps_desired = POWER_STATE_3;
break;
case NVME_POWER_STATE_STANDBY:
/* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
if (pcmod == 0x0)
ps_desired = max(POWER_STATE_0, (lowest_pow_st - 2));
else if (pcmod == 0x1)
ps_desired = max(POWER_STATE_0, (lowest_pow_st - 1));
break;
case NVME_POWER_STATE_LU_CONTROL:
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
nvme_sc = nvme_set_features(dev, NVME_FEAT_POWER_MGMT, ps_desired, 0,
NULL);
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_send_activate_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 buffer_id)
{
struct nvme_command c;
int nvme_sc;
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_activate_fw;
c.common.cdw10[0] = cpu_to_le32(buffer_id | NVME_FWACT_REPL_ACTV);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 opcode, u32 tot_len, u32 offset,
u8 buffer_id)
{
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_command c;
if (hdr->iovec_count > 0) {
/* Assuming SGL is not allowed for this command */
return nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_download_fw;
c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
nvme_sc = __nvme_submit_sync_cmd(dev->admin_q, &c, NULL,
hdr->dxferp, tot_len, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
/* Mode Select Helper Functions */
static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10,
u16 *bd_len, u8 *llbaa)
{
if (cdb10) {
/* 10 Byte CDB */
*bd_len = (parm_list[MODE_SELECT_10_BD_OFFSET] << 8) +
parm_list[MODE_SELECT_10_BD_OFFSET + 1];
*llbaa = parm_list[MODE_SELECT_10_LLBAA_OFFSET] &
MODE_SELECT_10_LLBAA_MASK;
} else {
/* 6 Byte CDB */
*bd_len = parm_list[MODE_SELECT_6_BD_OFFSET];
}
}
static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list,
u16 idx, u16 bd_len, u8 llbaa)
{
u16 bd_num;
bd_num = bd_len / ((llbaa == 0) ?
SHORT_DESC_BLOCK : LONG_DESC_BLOCK);
/* Store block descriptor info if a FORMAT UNIT comes later */
/* TODO Saving 1st BD info; what to do if multiple BD received? */
if (llbaa == 0) {
/* Standard Block Descriptor - spc4r34 7.5.5.1 */
ns->mode_select_num_blocks =
(parm_list[idx + 1] << 16) +
(parm_list[idx + 2] << 8) +
(parm_list[idx + 3]);
ns->mode_select_block_len =
(parm_list[idx + 5] << 16) +
(parm_list[idx + 6] << 8) +
(parm_list[idx + 7]);
} else {
/* Long LBA Block Descriptor - sbc3r27 6.4.2.3 */
ns->mode_select_num_blocks =
(((u64)parm_list[idx + 0]) << 56) +
(((u64)parm_list[idx + 1]) << 48) +
(((u64)parm_list[idx + 2]) << 40) +
(((u64)parm_list[idx + 3]) << 32) +
(((u64)parm_list[idx + 4]) << 24) +
(((u64)parm_list[idx + 5]) << 16) +
(((u64)parm_list[idx + 6]) << 8) +
((u64)parm_list[idx + 7]);
ns->mode_select_block_len =
(parm_list[idx + 12] << 24) +
(parm_list[idx + 13] << 16) +
(parm_list[idx + 14] << 8) +
(parm_list[idx + 15]);
}
}
static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *mode_page, u8 page_code)
{
int res = 0;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
unsigned dword11;
switch (page_code) {
case MODE_PAGE_CACHING:
dword11 = ((mode_page[2] & CACHING_MODE_PAGE_WCE_MASK) ? 1 : 0);
nvme_sc = nvme_set_features(dev, NVME_FEAT_VOLATILE_WC, dword11,
0, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
break;
case MODE_PAGE_CONTROL:
break;
case MODE_PAGE_POWER_CONDITION:
/* Verify the OS is not trying to set timers */
if ((mode_page[2] & 0x01) != 0 || (mode_page[3] & 0x0F) != 0) {
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_PARAMETER,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
return res;
}
static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd, u16 parm_list_len, u8 pf,
u8 sp, u8 cdb10)
{
int res;
u8 *parm_list;
u16 bd_len;
u8 llbaa = 0;
u16 index, saved_index;
u8 page_code;
u16 mp_size;
/* Get parm list from data-in/out buffer */
parm_list = kmalloc(parm_list_len, GFP_KERNEL);
if (parm_list == NULL) {
res = -ENOMEM;
goto out;
}
res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);
if (res)
goto out_mem;
nvme_trans_modesel_get_bd_len(parm_list, cdb10, &bd_len, &llbaa);
index = (cdb10) ? (MODE_SELECT_10_MPH_SIZE) : (MODE_SELECT_6_MPH_SIZE);
if (bd_len != 0) {
/* Block Descriptors present, parse */
nvme_trans_modesel_save_bd(ns, parm_list, index, bd_len, llbaa);
index += bd_len;
}
saved_index = index;
/* Multiple mode pages may be present; iterate through all */
/* In 1st Iteration, don't do NVME Command, only check for CDB errors */
do {
page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
mp_size = parm_list[index + 1] + 2;
if ((page_code != MODE_PAGE_CACHING) &&
(page_code != MODE_PAGE_CONTROL) &&
(page_code != MODE_PAGE_POWER_CONDITION)) {
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_mem;
}
index += mp_size;
} while (index < parm_list_len);
/* In 2nd Iteration, do the NVME Commands */
index = saved_index;
do {
page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
mp_size = parm_list[index + 1] + 2;
res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],
page_code);
if (res)
break;
index += mp_size;
} while (index < parm_list_len);
out_mem:
kfree(parm_list);
out:
return res;
}
/* Format Unit Helper Functions */
static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
struct sg_io_hdr *hdr)
{
int res = 0;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
u8 flbas;
/*
* SCSI Expects a MODE SELECT would have been issued prior to
* a FORMAT UNIT, and the block size and number would be used
* from the block descriptor in it. If a MODE SELECT had not
* been issued, FORMAT shall use the current values for both.
*/
if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
struct nvme_id_ns *id_ns;
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
if (ns->mode_select_num_blocks == 0)
ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
if (ns->mode_select_block_len == 0) {
flbas = (id_ns->flbas) & 0x0F;
ns->mode_select_block_len =
(1 << (id_ns->lbaf[flbas].ds));
}
kfree(id_ns);
}
return 0;
}
static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
u8 format_prot_info, u8 *nvme_pf_code)
{
int res;
u8 *parm_list;
u8 pf_usage, pf_code;
parm_list = kmalloc(len, GFP_KERNEL);
if (parm_list == NULL) {
res = -ENOMEM;
goto out;
}
res = nvme_trans_copy_from_user(hdr, parm_list, len);
if (res)
goto out_mem;
if ((parm_list[FORMAT_UNIT_IMMED_OFFSET] &
FORMAT_UNIT_IMMED_MASK) != 0) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_mem;
}
if (len == FORMAT_UNIT_LONG_PARM_LIST_LEN &&
(parm_list[FORMAT_UNIT_PROT_INT_OFFSET] & 0x0F) != 0) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_mem;
}
pf_usage = parm_list[FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET] &
FORMAT_UNIT_PROT_FIELD_USAGE_MASK;
pf_code = (pf_usage << 2) | format_prot_info;
switch (pf_code) {
case 0:
*nvme_pf_code = 0;
break;
case 2:
*nvme_pf_code = 1;
break;
case 3:
*nvme_pf_code = 2;
break;
case 7:
*nvme_pf_code = 3;
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
out_mem:
kfree(parm_list);
out:
return res;
}
static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 prot_info)
{
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id_ns;
u8 i;
u8 flbas, nlbaf;
u8 selected_lbaf = 0xFF;
u32 cdw10 = 0;
struct nvme_command c;
/* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
flbas = (id_ns->flbas) & 0x0F;
nlbaf = id_ns->nlbaf;
for (i = 0; i < nlbaf; i++) {
if (ns->mode_select_block_len == (1 << (id_ns->lbaf[i].ds))) {
selected_lbaf = i;
break;
}
}
if (selected_lbaf > 0x0F) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
if (ns->mode_select_num_blocks != le64_to_cpu(id_ns->ncap)) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
cdw10 |= prot_info << 5;
cdw10 |= selected_lbaf & 0x0F;
memset(&c, 0, sizeof(c));
c.format.opcode = nvme_admin_format_nvm;
c.format.nsid = cpu_to_le32(ns->ns_id);
c.format.cdw10 = cpu_to_le32(cdw10);
nvme_sc = nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0);
res = nvme_trans_status_code(hdr, nvme_sc);
kfree(id_ns);
return res;
}
static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,
struct nvme_trans_io_cdb *cdb_info,
u32 max_blocks)
{
/* If using iovecs, send one nvme command per vector */
if (hdr->iovec_count > 0)
return hdr->iovec_count;
else if (cdb_info->xfer_len > max_blocks)
return ((cdb_info->xfer_len - 1) / max_blocks) + 1;
else
return 1;
}
static u16 nvme_trans_io_get_control(struct nvme_ns *ns,
struct nvme_trans_io_cdb *cdb_info)
{
u16 control = 0;
/* When Protection information support is added, implement here */
if (cdb_info->fua > 0)
control |= NVME_RW_FUA;
return control;
}
static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
struct nvme_trans_io_cdb *cdb_info, u8 is_write)
{
int nvme_sc = NVME_SC_SUCCESS;
u32 num_cmds;
u64 unit_len;
u64 unit_num_blocks; /* Number of blocks to xfer in each nvme cmd */
u32 retcode;
u32 i = 0;
u64 nvme_offset = 0;
void __user *next_mapping_addr;
struct nvme_command c;
u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
u16 control;
u32 max_blocks = queue_max_hw_sectors(ns->queue);
num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
/*
* This loop handles two cases.
* First, when an SGL is used in the form of an iovec list:
* - Use iov_base as the next mapping address for the nvme command_id
* - Use iov_len as the data transfer length for the command.
* Second, when we have a single buffer
* - If larger than max_blocks, split into chunks, offset
* each nvme command accordingly.
*/
for (i = 0; i < num_cmds; i++) {
memset(&c, 0, sizeof(c));
if (hdr->iovec_count > 0) {
struct sg_iovec sgl;
retcode = copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec));
if (retcode)
return -EFAULT;
unit_len = sgl.iov_len;
unit_num_blocks = unit_len >> ns->lba_shift;
next_mapping_addr = sgl.iov_base;
} else {
unit_num_blocks = min((u64)max_blocks,
(cdb_info->xfer_len - nvme_offset));
unit_len = unit_num_blocks << ns->lba_shift;
next_mapping_addr = hdr->dxferp +
((1 << ns->lba_shift) * nvme_offset);
}
c.rw.opcode = opcode;
c.rw.nsid = cpu_to_le32(ns->ns_id);
c.rw.slba = cpu_to_le64(cdb_info->lba + nvme_offset);
c.rw.length = cpu_to_le16(unit_num_blocks - 1);
control = nvme_trans_io_get_control(ns, cdb_info);
c.rw.control = cpu_to_le16(control);
if (get_capacity(ns->disk) - unit_num_blocks <
cdb_info->lba + nvme_offset) {
nvme_sc = NVME_SC_LBA_RANGE;
break;
}
nvme_sc = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
next_mapping_addr, unit_len, NULL, 0);
if (nvme_sc)
break;
nvme_offset += unit_num_blocks;
}
return nvme_trans_status_code(hdr, nvme_sc);
}
/* SCSI Command Translation Functions */
static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,
u8 *cmd)
{
int res = 0;
struct nvme_trans_io_cdb cdb_info = { 0, };
u8 opcode = cmd[0];
u64 xfer_bytes;
u64 sum_iov_len = 0;
struct sg_iovec sgl;
int i;
size_t not_copied;
/*
* The FUA and WPROTECT fields are not supported in 6-byte CDBs,
* but always in the same place for all others.
*/
switch (opcode) {
case WRITE_6:
case READ_6:
break;
default:
cdb_info.fua = cmd[1] & 0x8;
cdb_info.prot_info = (cmd[1] & 0xe0) >> 5;
if (cdb_info.prot_info && !ns->pi_type) {
return nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
}
switch (opcode) {
case WRITE_6:
case READ_6:
cdb_info.lba = get_unaligned_be24(&cmd[1]);
cdb_info.xfer_len = cmd[4];
if (cdb_info.xfer_len == 0)
cdb_info.xfer_len = 256;
break;
case WRITE_10:
case READ_10:
cdb_info.lba = get_unaligned_be32(&cmd[2]);
cdb_info.xfer_len = get_unaligned_be16(&cmd[7]);
break;
case WRITE_12:
case READ_12:
cdb_info.lba = get_unaligned_be32(&cmd[2]);
cdb_info.xfer_len = get_unaligned_be32(&cmd[6]);
break;
case WRITE_16:
case READ_16:
cdb_info.lba = get_unaligned_be64(&cmd[2]);
cdb_info.xfer_len = get_unaligned_be32(&cmd[10]);
break;
default:
/* Will never really reach here */
res = -EIO;
goto out;
}
/* Calculate total length of transfer (in bytes) */
if (hdr->iovec_count > 0) {
for (i = 0; i < hdr->iovec_count; i++) {
not_copied = copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec));
if (not_copied)
return -EFAULT;
sum_iov_len += sgl.iov_len;
/* IO vector sizes should be multiples of block size */
if (sgl.iov_len % (1 << ns->lba_shift) != 0) {
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_PARAMETER,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
}
} else {
sum_iov_len = hdr->dxfer_len;
}
/* As Per sg ioctl howto, if the lengths differ, use the lower one */
xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);
/* If block count and actual data buffer size dont match, error out */
if (xfer_bytes != (cdb_info.xfer_len << ns->lba_shift)) {
res = -EINVAL;
goto out;
}
/* Check for 0 length transfer - it is not illegal */
if (cdb_info.xfer_len == 0)
goto out;
/* Send NVMe IO Command(s) */
res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);
if (res)
goto out;
out:
return res;
}
static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = 0;
u8 evpd;
u8 page_code;
int alloc_len;
u8 *inq_response;
evpd = cmd[1] & 0x01;
page_code = cmd[2];
alloc_len = get_unaligned_be16(&cmd[3]);
inq_response = kmalloc(max(alloc_len, STANDARD_INQUIRY_LENGTH),
GFP_KERNEL);
if (inq_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
if (evpd == 0) {
if (page_code == INQ_STANDARD_INQUIRY_PAGE) {
res = nvme_trans_standard_inquiry_page(ns, hdr,
inq_response, alloc_len);
} else {
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
} else {
switch (page_code) {
case VPD_SUPPORTED_PAGES:
res = nvme_trans_supported_vpd_pages(ns, hdr,
inq_response, alloc_len);
break;
case VPD_SERIAL_NUMBER:
res = nvme_trans_unit_serial_page(ns, hdr, inq_response,
alloc_len);
break;
case VPD_DEVICE_IDENTIFIERS:
res = nvme_trans_device_id_page(ns, hdr, inq_response,
alloc_len);
break;
case VPD_EXTENDED_INQUIRY:
res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
break;
case VPD_BLOCK_LIMITS:
res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
alloc_len);
break;
case VPD_BLOCK_DEV_CHARACTERISTICS:
res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
break;
default:
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
}
kfree(inq_response);
out_mem:
return res;
}
static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res;
u16 alloc_len;
u8 pc;
u8 page_code;
if (cmd[1] != LOG_SENSE_CDB_SP_NOT_ENABLED) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
page_code = cmd[2] & LOG_SENSE_CDB_PAGE_CODE_MASK;
pc = (cmd[2] & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT;
if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
alloc_len = get_unaligned_be16(&cmd[7]);
switch (page_code) {
case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE:
res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);
break;
case LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE:
res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);
break;
case LOG_PAGE_TEMPERATURE_PAGE:
res = nvme_trans_log_temperature(ns, hdr, alloc_len);
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
out:
return res;
}
static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
u8 cdb10 = 0;
u16 parm_list_len;
u8 page_format;
u8 save_pages;
page_format = cmd[1] & MODE_SELECT_CDB_PAGE_FORMAT_MASK;
save_pages = cmd[1] & MODE_SELECT_CDB_SAVE_PAGES_MASK;
if (cmd[0] == MODE_SELECT) {
parm_list_len = cmd[4];
} else {
parm_list_len = cmd[7];
cdb10 = 1;
}
if (parm_list_len != 0) {
/*
* According to SPC-4 r24, a paramter list length field of 0
* shall not be considered an error
*/
return nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
page_format, save_pages, cdb10);
}
return 0;
}
static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = 0;
u16 alloc_len;
u8 cdb10 = 0;
if (cmd[0] == MODE_SENSE) {
alloc_len = cmd[4];
} else {
alloc_len = get_unaligned_be16(&cmd[7]);
cdb10 = 1;
}
if ((cmd[2] & MODE_SENSE_PAGE_CONTROL_MASK) !=
MODE_SENSE_PC_CURRENT_VALUES) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
switch (cmd[2] & MODE_SENSE_PAGE_CODE_MASK) {
case MODE_PAGE_CACHING:
res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
cdb10,
&nvme_trans_fill_caching_page,
MODE_PAGE_CACHING_LEN);
break;
case MODE_PAGE_CONTROL:
res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
cdb10,
&nvme_trans_fill_control_page,
MODE_PAGE_CONTROL_LEN);
break;
case MODE_PAGE_POWER_CONDITION:
res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
cdb10,
&nvme_trans_fill_pow_cnd_page,
MODE_PAGE_POW_CND_LEN);
break;
case MODE_PAGE_INFO_EXCEP:
res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
cdb10,
&nvme_trans_fill_inf_exc_page,
MODE_PAGE_INF_EXC_LEN);
break;
case MODE_PAGE_RETURN_ALL:
res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
cdb10,
&nvme_trans_fill_all_pages,
MODE_PAGE_ALL_LEN);
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
out:
return res;
}
static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd, u8 cdb16)
{
int res;
int nvme_sc;
u32 alloc_len;
u32 resp_size;
u32 xfer_len;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id_ns;
u8 *response;
if (cdb16) {
alloc_len = get_unaligned_be32(&cmd[10]);
resp_size = READ_CAP_16_RESP_SIZE;
} else {
alloc_len = READ_CAP_10_RESP_SIZE;
resp_size = READ_CAP_10_RESP_SIZE;
}
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_free_id;
}
nvme_trans_fill_read_cap(response, id_ns, cdb16);
xfer_len = min(alloc_len, resp_size);
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
kfree(response);
out_free_id:
kfree(id_ns);
return res;
}
static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res;
int nvme_sc;
u32 alloc_len, xfer_len, resp_size;
u8 *response;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ctrl *id_ctrl;
u32 ll_length, lun_id;
u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
__be32 tmp_len;
switch (cmd[2]) {
default:
return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
case ALL_LUNS_RETURNED:
case ALL_WELL_KNOWN_LUNS_RETURNED:
case RESTRICTED_LUNS_RETURNED:
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
return res;
ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
resp_size = ll_length + LUN_DATA_HEADER_SIZE;
alloc_len = get_unaligned_be32(&cmd[6]);
if (alloc_len < resp_size) {
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_free_id;
}
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_free_id;
}
/* The first LUN ID will always be 0 per the SAM spec */
for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
/*
* Set the LUN Id and then increment to the next LUN
* location in the parameter data.
*/
__be64 tmp_id = cpu_to_be64(lun_id);
memcpy(&response[lun_id_offset], &tmp_id, sizeof(u64));
lun_id_offset += LUN_ENTRY_SIZE;
}
tmp_len = cpu_to_be32(ll_length);
memcpy(response, &tmp_len, sizeof(u32));
}
xfer_len = min(alloc_len, resp_size);
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
kfree(response);
out_free_id:
kfree(id_ctrl);
return res;
}
static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res;
u8 alloc_len, xfer_len, resp_size;
u8 desc_format;
u8 *response;
desc_format = cmd[1] & 0x01;
alloc_len = cmd[4];
resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
(FIXED_FMT_SENSE_DATA_SIZE));
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out;
}
if (desc_format) {
/* Descriptor Format Sense Data */
response[0] = DESC_FORMAT_SENSE_DATA;
response[1] = NO_SENSE;
/* TODO How is LOW POWER CONDITION ON handled? (byte 2) */
response[2] = SCSI_ASC_NO_SENSE;
response[3] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
/* SDAT_OVFL = 0 | Additional Sense Length = 0 */
} else {
/* Fixed Format Sense Data */
response[0] = FIXED_SENSE_DATA;
/* Byte 1 = Obsolete */
response[2] = NO_SENSE; /* FM, EOM, ILI, SDAT_OVFL = 0 */
/* Bytes 3-6 - Information - set to zero */
response[7] = FIXED_SENSE_DATA_ADD_LENGTH;
/* Bytes 8-11 - Cmd Specific Information - set to zero */
response[12] = SCSI_ASC_NO_SENSE;
response[13] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
/* Byte 14 = Field Replaceable Unit Code = 0 */
/* Bytes 15-17 - SKSV=0; Sense Key Specific = 0 */
}
xfer_len = min(alloc_len, resp_size);
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
kfree(response);
out:
return res;
}
static int nvme_trans_security_protocol(struct nvme_ns *ns,
struct sg_io_hdr *hdr,
u8 *cmd)
{
return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
struct sg_io_hdr *hdr)
{
int nvme_sc;
struct nvme_command c;
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
u8 immed, pcmod, pc, no_flush, start;
immed = cmd[1] & 0x01;
pcmod = cmd[3] & 0x0f;
pc = (cmd[4] & 0xf0) >> 4;
no_flush = cmd[4] & 0x04;
start = cmd[4] & 0x01;
if (immed != 0) {
return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
} else {
if (no_flush == 0) {
/* Issue NVME FLUSH command prior to START STOP UNIT */
int res = nvme_trans_synchronize_cache(ns, hdr);
if (res)
return res;
}
/* Setup the expected power state transition */
return nvme_trans_power_state(ns, hdr, pc, pcmod, start);
}
}
static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res;
u8 parm_hdr_len = 0;
u8 nvme_pf_code = 0;
u8 format_prot_info, long_list, format_data;
format_prot_info = (cmd[1] & 0xc0) >> 6;
long_list = cmd[1] & 0x20;
format_data = cmd[1] & 0x10;
if (format_data != 0) {
if (format_prot_info != 0) {
if (long_list == 0)
parm_hdr_len = FORMAT_UNIT_SHORT_PARM_LIST_LEN;
else
parm_hdr_len = FORMAT_UNIT_LONG_PARM_LIST_LEN;
}
} else if (format_data == 0 && format_prot_info != 0) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
/* Get parm header from data-in/out buffer */
/*
* According to the translation spec, the only fields in the parameter
* list we are concerned with are in the header. So allocate only that.
*/
if (parm_hdr_len > 0) {
res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,
format_prot_info, &nvme_pf_code);
if (res)
goto out;
}
/* Attempt to activate any previously downloaded firmware image */
res = nvme_trans_send_activate_fw_cmd(ns, hdr, 0);
/* Determine Block size and count and send format command */
res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
if (res)
goto out;
res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);
out:
return res;
}
static int nvme_trans_test_unit_ready(struct nvme_ns *ns,
struct sg_io_hdr *hdr,
u8 *cmd)
{
struct nvme_dev *dev = ns->dev;
if (!(readl(&dev->bar->csts) & NVME_CSTS_RDY))
return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
NOT_READY, SCSI_ASC_LUN_NOT_READY,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
else
return nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
}
static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = 0;
u32 buffer_offset, parm_list_length;
u8 buffer_id, mode;
parm_list_length = get_unaligned_be24(&cmd[6]);
if (parm_list_length % BYTES_TO_DWORDS != 0) {
/* NVMe expects Firmware file to be a whole number of DWORDS */
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
buffer_id = cmd[2];
if (buffer_id > NVME_MAX_FIRMWARE_SLOT) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
mode = cmd[1] & 0x1f;
buffer_offset = get_unaligned_be24(&cmd[3]);
switch (mode) {
case DOWNLOAD_SAVE_ACTIVATE:
res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
parm_list_length, buffer_offset,
buffer_id);
if (res)
goto out;
res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
break;
case DOWNLOAD_SAVE_DEFER_ACTIVATE:
res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
parm_list_length, buffer_offset,
buffer_id);
break;
case ACTIVATE_DEFERRED_MICROCODE:
res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
out:
return res;
}
struct scsi_unmap_blk_desc {
__be64 slba;
__be32 nlb;
u32 resv;
};
struct scsi_unmap_parm_list {
__be16 unmap_data_len;
__be16 unmap_blk_desc_data_len;
u32 resv;
struct scsi_unmap_blk_desc desc[0];
};
static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
struct scsi_unmap_parm_list *plist;
struct nvme_dsm_range *range;
struct nvme_command c;
int i, nvme_sc, res;
u16 ndesc, list_len;
list_len = get_unaligned_be16(&cmd[7]);
if (!list_len)
return -EINVAL;
plist = kmalloc(list_len, GFP_KERNEL);
if (!plist)
return -ENOMEM;
res = nvme_trans_copy_from_user(hdr, plist, list_len);
if (res)
goto out;
ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
if (!ndesc || ndesc > 256) {
res = -EINVAL;
goto out;
}
range = kcalloc(ndesc, sizeof(*range), GFP_KERNEL);
if (!range) {
res = -ENOMEM;
goto out;
}
for (i = 0; i < ndesc; i++) {
range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));
range[i].slba = cpu_to_le64(be64_to_cpu(plist->desc[i].slba));
range[i].cattr = 0;
}
memset(&c, 0, sizeof(c));
c.dsm.opcode = nvme_cmd_dsm;
c.dsm.nsid = cpu_to_le32(ns->ns_id);
c.dsm.nr = cpu_to_le32(ndesc - 1);
c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, range,
ndesc * sizeof(*range));
res = nvme_trans_status_code(hdr, nvme_sc);
kfree(range);
out:
kfree(plist);
return res;
}
static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
{
u8 cmd[BLK_MAX_CDB];
int retcode;
unsigned int opcode;
if (hdr->cmdp == NULL)
return -EMSGSIZE;
if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
/*
* Prime the hdr with good status for scsi commands that don't require
* an nvme command for translation.
*/
retcode = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
if (retcode)
return retcode;
opcode = cmd[0];
switch (opcode) {
case READ_6:
case READ_10:
case READ_12:
case READ_16:
retcode = nvme_trans_io(ns, hdr, 0, cmd);
break;
case WRITE_6:
case WRITE_10:
case WRITE_12:
case WRITE_16:
retcode = nvme_trans_io(ns, hdr, 1, cmd);
break;
case INQUIRY:
retcode = nvme_trans_inquiry(ns, hdr, cmd);
break;
case LOG_SENSE:
retcode = nvme_trans_log_sense(ns, hdr, cmd);
break;
case MODE_SELECT:
case MODE_SELECT_10:
retcode = nvme_trans_mode_select(ns, hdr, cmd);
break;
case MODE_SENSE:
case MODE_SENSE_10:
retcode = nvme_trans_mode_sense(ns, hdr, cmd);
break;
case READ_CAPACITY:
retcode = nvme_trans_read_capacity(ns, hdr, cmd, 0);
break;
case SERVICE_ACTION_IN_16:
switch (cmd[1]) {
case SAI_READ_CAPACITY_16:
retcode = nvme_trans_read_capacity(ns, hdr, cmd, 1);
break;
default:
goto out;
}
break;
case REPORT_LUNS:
retcode = nvme_trans_report_luns(ns, hdr, cmd);
break;
case REQUEST_SENSE:
retcode = nvme_trans_request_sense(ns, hdr, cmd);
break;
case SECURITY_PROTOCOL_IN:
case SECURITY_PROTOCOL_OUT:
retcode = nvme_trans_security_protocol(ns, hdr, cmd);
break;
case START_STOP:
retcode = nvme_trans_start_stop(ns, hdr, cmd);
break;
case SYNCHRONIZE_CACHE:
retcode = nvme_trans_synchronize_cache(ns, hdr);
break;
case FORMAT_UNIT:
retcode = nvme_trans_format_unit(ns, hdr, cmd);
break;
case TEST_UNIT_READY:
retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);
break;
case WRITE_BUFFER:
retcode = nvme_trans_write_buffer(ns, hdr, cmd);
break;
case UNMAP:
retcode = nvme_trans_unmap(ns, hdr, cmd);
break;
default:
out:
retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
break;
}
return retcode;
}
int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr)
{
struct sg_io_hdr hdr;
int retcode;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))
return -EFAULT;
if (hdr.interface_id != 'S')
return -EINVAL;
if (hdr.cmd_len > BLK_MAX_CDB)
return -EINVAL;
/*
* A positive return code means a NVMe status, which has been
* translated to sense data.
*/
retcode = nvme_scsi_translate(ns, &hdr);
if (retcode < 0)
return retcode;
if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
return -EFAULT;
return 0;
}
int nvme_sg_get_version_num(int __user *ip)
{
return put_user(sg_version_num, ip);
}
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