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nvme-scsi.c
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/*
* NVM Express device driver
* Copyright (c) 2011, 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* 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/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 <scsi/sg.h>
#include <scsi/scsi.h>
static int sg_version_num = 30534; /* 2 digits for each component */
#define SNTI_TRANSLATION_SUCCESS 0
#define SNTI_INTERNAL_ERROR 1
/* 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_DEV_CHARACTERISTICS 0xB1
/* CDB offsets */
#define REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET 6
#define REPORT_LUNS_SR_OFFSET 2
#define READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET 10
#define REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET 4
#define REQUEST_SENSE_DESC_OFFSET 1
#define REQUEST_SENSE_DESC_MASK 0x01
#define DESCRIPTOR_FORMAT_SENSE_DATA_TYPE 1
#define INQUIRY_EVPD_BYTE_OFFSET 1
#define INQUIRY_PAGE_CODE_BYTE_OFFSET 2
#define INQUIRY_EVPD_BIT_MASK 1
#define INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET 3
#define START_STOP_UNIT_CDB_IMMED_OFFSET 1
#define START_STOP_UNIT_CDB_IMMED_MASK 0x1
#define START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET 3
#define START_STOP_UNIT_CDB_POWER_COND_MOD_MASK 0xF
#define START_STOP_UNIT_CDB_POWER_COND_OFFSET 4
#define START_STOP_UNIT_CDB_POWER_COND_MASK 0xF0
#define START_STOP_UNIT_CDB_NO_FLUSH_OFFSET 4
#define START_STOP_UNIT_CDB_NO_FLUSH_MASK 0x4
#define START_STOP_UNIT_CDB_START_OFFSET 4
#define START_STOP_UNIT_CDB_START_MASK 0x1
#define WRITE_BUFFER_CDB_MODE_OFFSET 1
#define WRITE_BUFFER_CDB_MODE_MASK 0x1F
#define WRITE_BUFFER_CDB_BUFFER_ID_OFFSET 2
#define WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET 3
#define WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET 6
#define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET 1
#define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK 0xC0
#define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT 6
#define FORMAT_UNIT_CDB_LONG_LIST_OFFSET 1
#define FORMAT_UNIT_CDB_LONG_LIST_MASK 0x20
#define FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET 1
#define FORMAT_UNIT_CDB_FORMAT_DATA_MASK 0x10
#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
#define UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET 7
/* Misc. defines */
#define NIBBLE_SHIFT 4
#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_CHARACTERISTICS_PAGE 0xB1
#define INQ_SERIAL_NUMBER_LENGTH 0x14
#define INQ_NUM_SUPPORTED_VPD_PAGES 5
#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
/* SCSI READ/WRITE Defines */
#define IO_CDB_WP_MASK 0xE0
#define IO_CDB_WP_SHIFT 5
#define IO_CDB_FUA_MASK 0x8
#define IO_6_CDB_LBA_OFFSET 0
#define IO_6_CDB_LBA_MASK 0x001FFFFF
#define IO_6_CDB_TX_LEN_OFFSET 4
#define IO_6_DEFAULT_TX_LEN 256
#define IO_10_CDB_LBA_OFFSET 2
#define IO_10_CDB_TX_LEN_OFFSET 7
#define IO_10_CDB_WP_OFFSET 1
#define IO_10_CDB_FUA_OFFSET 1
#define IO_12_CDB_LBA_OFFSET 2
#define IO_12_CDB_TX_LEN_OFFSET 6
#define IO_12_CDB_WP_OFFSET 1
#define IO_12_CDB_FUA_OFFSET 1
#define IO_16_CDB_FUA_OFFSET 1
#define IO_16_CDB_WP_OFFSET 1
#define IO_16_CDB_LBA_OFFSET 2
#define IO_16_CDB_TX_LEN_OFFSET 10
/* 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_SENSE6_ALLOC_LEN_OFFSET 4
#define MODE_SENSE_PAGE_CONTROL_OFFSET 2
#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_OFFSET 1
#define MODE_SENSE_LLBAA_MASK 0x10
#define MODE_SENSE_LLBAA_SHIFT 4
#define MODE_SENSE_DBD_OFFSET 1
#define MODE_SENSE_DBD_MASK 8
#define MODE_SENSE_DBD_SHIFT 3
#define MODE_SENSE10_MPH_SIZE 8
#define MODE_SENSE10_ALLOC_LEN_OFFSET 7
#define MODE_SELECT_CDB_PAGE_FORMAT_OFFSET 1
#define MODE_SELECT_CDB_SAVE_PAGES_OFFSET 1
#define MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET 4
#define MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET 7
#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_OFFSET 1
#define LOG_SENSE_CDB_SP_NOT_ENABLED 0
#define LOG_SENSE_CDB_PC_OFFSET 2
#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 LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET 7
#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 NVME_GET_SMART_LOG_PAGE 0x02
#define NVME_GET_FEAT_TEMP_THRESH 0x04
#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
/**
* DEVICE_SPECIFIC_PARAMETER in mode parameter header (see sbc2r16) to
* enable DPOFUA support type 0x10 value.
*/
#define DEVICE_SPECIFIC_PARAMETER 0
#define VPD_ID_DESCRIPTOR_LENGTH sizeof(VPD_IDENTIFICATION_DESCRIPTOR)
/* MACROs to extract information from CDBs */
#define GET_OPCODE(cdb) cdb[0]
#define GET_U8_FROM_CDB(cdb, index) (cdb[index] << 0)
#define GET_U16_FROM_CDB(cdb, index) ((cdb[index] << 8) | (cdb[index + 1] << 0))
#define GET_U24_FROM_CDB(cdb, index) ((cdb[index] << 16) | \
(cdb[index + 1] << 8) | \
(cdb[index + 2] << 0))
#define GET_U32_FROM_CDB(cdb, index) ((cdb[index] << 24) | \
(cdb[index + 1] << 16) | \
(cdb[index + 2] << 8) | \
(cdb[index + 3] << 0))
#define GET_U64_FROM_CDB(cdb, index) ((((u64)cdb[index]) << 56) | \
(((u64)cdb[index + 1]) << 48) | \
(((u64)cdb[index + 2]) << 40) | \
(((u64)cdb[index + 3]) << 32) | \
(((u64)cdb[index + 4]) << 24) | \
(((u64)cdb[index + 5]) << 16) | \
(((u64)cdb[index + 6]) << 8) | \
(((u64)cdb[index + 7]) << 0))
/* Inquiry Helper Macros */
#define GET_INQ_EVPD_BIT(cdb) \
((GET_U8_FROM_CDB(cdb, INQUIRY_EVPD_BYTE_OFFSET) & \
INQUIRY_EVPD_BIT_MASK) ? 1 : 0)
#define GET_INQ_PAGE_CODE(cdb) \
(GET_U8_FROM_CDB(cdb, INQUIRY_PAGE_CODE_BYTE_OFFSET))
#define GET_INQ_ALLOC_LENGTH(cdb) \
(GET_U16_FROM_CDB(cdb, INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET))
/* Report LUNs Helper Macros */
#define GET_REPORT_LUNS_ALLOC_LENGTH(cdb) \
(GET_U32_FROM_CDB(cdb, REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET))
/* Read Capacity Helper Macros */
#define GET_READ_CAP_16_ALLOC_LENGTH(cdb) \
(GET_U32_FROM_CDB(cdb, READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET))
#define IS_READ_CAP_16(cdb) \
((cdb[0] == SERVICE_ACTION_IN && cdb[1] == SAI_READ_CAPACITY_16) ? 1 : 0)
/* Request Sense Helper Macros */
#define GET_REQUEST_SENSE_ALLOC_LENGTH(cdb) \
(GET_U8_FROM_CDB(cdb, REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET))
/* Mode Sense Helper Macros */
#define GET_MODE_SENSE_DBD(cdb) \
((GET_U8_FROM_CDB(cdb, MODE_SENSE_DBD_OFFSET) & MODE_SENSE_DBD_MASK) >> \
MODE_SENSE_DBD_SHIFT)
#define GET_MODE_SENSE_LLBAA(cdb) \
((GET_U8_FROM_CDB(cdb, MODE_SENSE_LLBAA_OFFSET) & \
MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT)
#define GET_MODE_SENSE_MPH_SIZE(cdb10) \
(cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE)
/* 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 res = SNTI_TRANSLATION_SUCCESS;
unsigned long not_copied;
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++) {
not_copied = copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec));
if (not_copied)
return -EFAULT;
xfer_len = min(remaining, sgl.iov_len);
not_copied = copy_to_user(sgl.iov_base, index,
xfer_len);
if (not_copied) {
res = -EFAULT;
break;
}
index += xfer_len;
remaining -= xfer_len;
if (remaining == 0)
break;
}
return res;
}
not_copied = copy_to_user(hdr->dxferp, from, n);
if (not_copied)
res = -EFAULT;
return res;
}
/* Copy data from userspace memory */
static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,
unsigned long n)
{
int res = SNTI_TRANSLATION_SUCCESS;
unsigned long not_copied;
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++) {
not_copied = copy_from_user(&sgl, hdr->dxferp +
i * sizeof(struct sg_iovec),
sizeof(struct sg_iovec));
if (not_copied)
return -EFAULT;
xfer_len = min(remaining, sgl.iov_len);
not_copied = copy_from_user(index, sgl.iov_base,
xfer_len);
if (not_copied) {
res = -EFAULT;
break;
}
index += xfer_len;
remaining -= xfer_len;
if (remaining == 0)
break;
}
return res;
}
not_copied = copy_from_user(to, hdr->dxferp, n);
if (not_copied)
res = -EFAULT;
return res;
}
/* Status/Sense Buffer Writeback */
static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,
u8 asc, u8 ascq)
{
int res = SNTI_TRANSLATION_SUCCESS;
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)
res = -EFAULT;
}
return res;
}
static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)
{
u8 status, sense_key, asc, ascq;
int res = SNTI_TRANSLATION_SUCCESS;
/* For non-nvme (Linux) errors, simply return the error code */
if (nvme_sc < 0)
return nvme_sc;
/* Mask DNR, More, and reserved fields */
nvme_sc &= 0x7FF;
switch (nvme_sc) {
/* 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;
}
/* 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;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
int xfer_len;
u8 resp_data_format = 0x02;
u8 protect;
u8 cmdque = 0x01 << 1;
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* nvme ns identify - use DPS value for PROTECT field */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
/*
* If nvme_sc was -ve, res will be -ve here.
* If nvme_sc was +ve, the status would bace been translated, and res
* can only be 0 or -ve.
* - If 0 && nvme_sc > 0, then go into next if where res gets nvme_sc
* - If -ve, return because its a Linux error.
*/
if (res)
goto out_free;
if (nvme_sc) {
res = nvme_sc;
goto out_free;
}
id_ns = mem;
(id_ns->dps) ? (protect = 0x01) : (protect = 0);
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);
strncpy(&inq_response[32], dev->firmware_rev, 4);
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out_dma:
return res;
}
static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *inq_response,
int alloc_len)
{
int res = SNTI_TRANSLATION_SUCCESS;
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;
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
return res;
}
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 res = SNTI_TRANSLATION_SUCCESS;
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);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
return res;
}
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;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ctrl *id_ctrl;
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
u8 ieee[4];
int xfer_len;
__be32 tmp_id = cpu_to_be32(ns->ns_id);
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* nvme controller identify */
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
if (nvme_sc) {
res = nvme_sc;
goto out_free;
}
id_ctrl = mem;
/* Since SCSI tried to save 4 bits... [SPC-4(r34) Table 591] */
ieee[0] = id_ctrl->ieee[0] << 4;
ieee[1] = id_ctrl->ieee[0] >> 4 | id_ctrl->ieee[1] << 4;
ieee[2] = id_ctrl->ieee[1] >> 4 | id_ctrl->ieee[2] << 4;
ieee[3] = id_ctrl->ieee[2] >> 4;
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE; /* Page Code */
inq_response[3] = 20; /* Page Length */
/* Designation Descriptor start */
inq_response[4] = 0x01; /* Proto ID=0h | Code set=1h */
inq_response[5] = 0x03; /* PIV=0b | Asso=00b | Designator Type=3h */
inq_response[6] = 0x00; /* Rsvd */
inq_response[7] = 16; /* Designator Length */
/* Designator start */
inq_response[8] = 0x60 | ieee[3]; /* NAA=6h | IEEE ID MSB, High nibble*/
inq_response[9] = ieee[2]; /* IEEE ID */
inq_response[10] = ieee[1]; /* IEEE ID */
inq_response[11] = ieee[0]; /* IEEE ID| Vendor Specific ID... */
inq_response[12] = (dev->pci_dev->vendor & 0xFF00) >> 8;
inq_response[13] = (dev->pci_dev->vendor & 0x00FF);
inq_response[14] = dev->serial[0];
inq_response[15] = dev->serial[1];
inq_response[16] = dev->model[0];
inq_response[17] = dev->model[1];
memcpy(&inq_response[18], &tmp_id, sizeof(u32));
/* Last 2 bytes are zero */
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out_dma:
return res;
}
static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
u8 *inq_response;
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
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) {
res = -ENOMEM;
goto out_mem;
}
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
if (nvme_sc) {
res = nvme_sc;
goto out_free;
}
id_ns = mem;
spt = spt_lut[(id_ns->dpc) & 0x07] << 3;
(id_ns->dps) ? (protect = 0x01) : (protect = 0);
grd_chk = protect << 2;
app_chk = protect << 1;
ref_chk = protect;
/* nvme controller identify */
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
if (nvme_sc) {
res = nvme_sc;
goto out_free;
}
id_ctrl = mem;
v_sup = id_ctrl->vwc;
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:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out_dma:
kfree(inq_response);
out_mem:
return res;
}
static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
u8 *inq_response;
int res = SNTI_TRANSLATION_SUCCESS;
int xfer_len;
inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
if (inq_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
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 = SNTI_TRANSLATION_SUCCESS;
int xfer_len;
u8 *log_response;
log_response = kmalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
memset(log_response, 0, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
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 = SNTI_TRANSLATION_SUCCESS;
int xfer_len;
u8 *log_response;
struct nvme_command c;
struct nvme_dev *dev = ns->dev;
struct nvme_smart_log *smart_log;
dma_addr_t dma_addr;
void *mem;
u8 temp_c;