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linux/drivers/block/nvme-scsi.c
Dan McLeran b8e080847a NVMe: Fix START_STOP_UNIT Scsi->NVMe translation. 
This patch contains several fixes for Scsi START_STOP_UNIT. The previous
code did not account for signed vs. unsigned arithmetic which resulted
in an invalid lowest power state caculation when the device only supports
1 power state.

The code for Power Condition == 2 (Idle) was not following the spec. The
spec calls for setting the device to specific power states, depending
upon Power Condition Modifier, without accounting for the number of
power states supported by the device.

The code for Power Condition == 3 (Standby) was using a hard-coded '0'
which is replaced with the macro POWER_STATE_0.

Signed-off-by: Dan McLeran <daniel.mcleran@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@linux.intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-06-13 13:11:00 -04:00

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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 <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 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;
u8 fw_offset = sizeof(dev->firmware_rev);
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);
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);
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 = 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 = SNTI_TRANSLATION_SUCCESS;
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 = 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;
u16 temp_k;
log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_smart_log),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* Get SMART Log Page */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_get_log_page;
c.common.nsid = cpu_to_le32(0xFFFFFFFF);
c.common.prp1 = cpu_to_le64(dma_addr);
c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
res = nvme_submit_admin_cmd(dev, &c, NULL);
if (res != NVME_SC_SUCCESS) {
temp_c = LOG_TEMP_UNKNOWN;
} else {
smart_log = mem;
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c = temp_k - KELVIN_TEMP_FACTOR;
}
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);
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
mem, dma_addr);
out_dma:
kfree(log_response);
out_mem:
return res;
}
static int nvme_trans_log_temperature(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;
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) {
res = -ENOMEM;
goto out_mem;
}
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_smart_log),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* Get SMART Log Page */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_get_log_page;
c.common.nsid = cpu_to_le32(0xFFFFFFFF);
c.common.prp1 = cpu_to_le64(dma_addr);
c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
res = nvme_submit_admin_cmd(dev, &c, NULL);
if (res != NVME_SC_SUCCESS) {
temp_c_cur = LOG_TEMP_UNKNOWN;
} else {
smart_log = mem;
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
}
/* 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);
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
mem, dma_addr);
out_dma:
kfree(log_response);
out_mem:
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 SNTI_INTERNAL_ERROR;
if (cdb10) {
resp[0] = (mode_data_length & 0xFF00) >> 8;
resp[1] = (mode_data_length & 0x00FF);
/* resp[2] and [3] are zero */
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[1] and [2] are zero */
resp[3] = (blk_desc_len & 0x00FF);
}
return SNTI_TRANSLATION_SUCCESS;
}
static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *resp, int len, u8 llbaa)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 flbas;
u32 lba_length;
if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
return SNTI_INTERNAL_ERROR;
else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
return SNTI_INTERNAL_ERROR;
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* 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_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ns = mem;
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));
}
out_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out:
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 SNTI_INTERNAL_ERROR;
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 SNTI_TRANSLATION_SUCCESS;
}
static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr,
u8 *resp, int len)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
u32 feature_resp;
u8 vwc;
if (len < MODE_PAGE_CACHING_LEN)
return SNTI_INTERNAL_ERROR;
nvme_sc = nvme_get_features(dev, NVME_FEAT_VOLATILE_WC, 0, 0,
&feature_resp);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out;
if (nvme_sc) {
res = nvme_sc;
goto out;
}
vwc = feature_resp & 0x00000001;
resp[0] = MODE_PAGE_CACHING;
resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
resp[2] = vwc << 2;
out:
return res;
}
static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *resp,
int len)
{
int res = SNTI_TRANSLATION_SUCCESS;
if (len < MODE_PAGE_POW_CND_LEN)
return SNTI_INTERNAL_ERROR;
resp[0] = MODE_PAGE_POWER_CONDITION;
resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
/* All other bytes are zero */
return res;
}
static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *resp,
int len)
{
int res = SNTI_TRANSLATION_SUCCESS;
if (len < MODE_PAGE_INF_EXC_LEN)
return SNTI_INTERNAL_ERROR;
resp[0] = MODE_PAGE_INFO_EXCEP;
resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
resp[2] = 0x88;
/* All other bytes are zero */
return res;
}
static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *resp, int len)
{
int res = SNTI_TRANSLATION_SUCCESS;
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 != SNTI_TRANSLATION_SUCCESS)
goto out;
res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
MODE_PAGE_CONTROL_LEN);
if (res != SNTI_TRANSLATION_SUCCESS)
goto out;
res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
MODE_PAGE_POW_CND_LEN);
if (res != SNTI_TRANSLATION_SUCCESS)
goto out;
res = nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
MODE_PAGE_INF_EXC_LEN);
if (res != SNTI_TRANSLATION_SUCCESS)
goto out;
out:
return res;
}
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 = SNTI_TRANSLATION_SUCCESS;
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 = GET_MODE_SENSE_DBD(cmd);
llbaa = GET_MODE_SENSE_LLBAA(cmd);
mph_size = GET_MODE_SENSE_MPH_SIZE(cdb10);
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 != SNTI_TRANSLATION_SUCCESS)
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 != SNTI_TRANSLATION_SUCCESS)
goto out_free;
}
res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
mode_pages_tot_len);
if (res != SNTI_TRANSLATION_SUCCESS)
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 = 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;
int lowest_pow_st; /* max npss = lowest power consumption */
unsigned ps_desired = 0;
/* NVMe Controller Identify */
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_id_ctrl),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ctrl = mem;
lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
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);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
if (nvme_sc)
res = nvme_sc;
out_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
dma_addr);
out:
return res;
}
/* Write Buffer Helper Functions */
/* Also using this for Format Unit with hdr passed as NULL, and buffer_id, 0 */
static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 opcode, u32 tot_len, u32 offset,
u8 buffer_id)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_command c;
struct nvme_iod *iod = NULL;
unsigned length;
memset(&c, 0, sizeof(c));
c.common.opcode = opcode;
if (opcode == nvme_admin_download_fw) {
if (hdr->iovec_count > 0) {
/* Assuming SGL is not allowed for this command */
res = nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST,
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
}
iod = nvme_map_user_pages(dev, DMA_TO_DEVICE,
(unsigned long)hdr->dxferp, tot_len);
if (IS_ERR(iod)) {
res = PTR_ERR(iod);
goto out;
}
length = nvme_setup_prps(dev, iod, tot_len, GFP_KERNEL);
if (length != tot_len) {
res = -ENOMEM;
goto out_unmap;
}
c.dlfw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.dlfw.prp2 = cpu_to_le64(iod->first_dma);
c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
} else if (opcode == nvme_admin_activate_fw) {
u32 cdw10 = buffer_id | NVME_FWACT_REPL_ACTV;
c.common.cdw10[0] = cpu_to_le32(cdw10);
}
nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_unmap;
if (nvme_sc)
res = nvme_sc;
out_unmap:
if (opcode == nvme_admin_download_fw) {
nvme_unmap_user_pages(dev, DMA_TO_DEVICE, iod);
nvme_free_iod(dev, iod);
}
out:
return res;
}
/* 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 = SNTI_TRANSLATION_SUCCESS;
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);
if (res)
break;
if (nvme_sc) {
res = nvme_sc;
break;
}
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);
if (!res)
res = SNTI_INTERNAL_ERROR;
break;
}
break;
default:
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
if (!res)
res = SNTI_INTERNAL_ERROR;
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 = SNTI_TRANSLATION_SUCCESS;
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 != SNTI_TRANSLATION_SUCCESS)
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 != SNTI_TRANSLATION_SUCCESS)
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 = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
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) {
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_id_ns), &dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* 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_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ns = mem;
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));
}
out_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
mem, dma_addr);
}
out:
return res;
}
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 = SNTI_TRANSLATION_SUCCESS;
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 != SNTI_TRANSLATION_SUCCESS)
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 = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
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 */
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* 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_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ns = mem;
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_admin_cmd(dev, &c, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
if (nvme_sc)
res = nvme_sc;
out_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out:
return res;
}
/* Read/Write Helper Functions */
static inline void nvme_trans_get_io_cdb6(u8 *cmd,
struct nvme_trans_io_cdb *cdb_info)
{
cdb_info->fua = 0;
cdb_info->prot_info = 0;
cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_6_CDB_LBA_OFFSET) &
IO_6_CDB_LBA_MASK;
cdb_info->xfer_len = GET_U8_FROM_CDB(cmd, IO_6_CDB_TX_LEN_OFFSET);
/* sbc3r27 sec 5.32 - TRANSFER LEN of 0 implies a 256 Block transfer */
if (cdb_info->xfer_len == 0)
cdb_info->xfer_len = IO_6_DEFAULT_TX_LEN;
}
static inline void nvme_trans_get_io_cdb10(u8 *cmd,
struct nvme_trans_io_cdb *cdb_info)
{
cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_10_CDB_FUA_OFFSET) &
IO_CDB_FUA_MASK;
cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_10_CDB_WP_OFFSET) &
IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_10_CDB_LBA_OFFSET);
cdb_info->xfer_len = GET_U16_FROM_CDB(cmd, IO_10_CDB_TX_LEN_OFFSET);
}
static inline void nvme_trans_get_io_cdb12(u8 *cmd,
struct nvme_trans_io_cdb *cdb_info)
{
cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_12_CDB_FUA_OFFSET) &
IO_CDB_FUA_MASK;
cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_12_CDB_WP_OFFSET) &
IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_12_CDB_LBA_OFFSET);
cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_12_CDB_TX_LEN_OFFSET);
}
static inline void nvme_trans_get_io_cdb16(u8 *cmd,
struct nvme_trans_io_cdb *cdb_info)
{
cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_16_CDB_FUA_OFFSET) &
IO_CDB_FUA_MASK;
cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_16_CDB_WP_OFFSET) &
IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
cdb_info->lba = GET_U64_FROM_CDB(cmd, IO_16_CDB_LBA_OFFSET);
cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_16_CDB_TX_LEN_OFFSET);
}
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 res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
u32 num_cmds;
struct nvme_iod *iod;
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);
iod = nvme_map_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
(unsigned long)next_mapping_addr, unit_len);
if (IS_ERR(iod)) {
res = PTR_ERR(iod);
goto out;
}
retcode = nvme_setup_prps(dev, iod, unit_len, GFP_KERNEL);
if (retcode != unit_len) {
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
iod);
nvme_free_iod(dev, iod);
res = -ENOMEM;
goto out;
}
c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.rw.prp2 = cpu_to_le64(iod->first_dma);
nvme_offset += unit_num_blocks;
nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);
if (nvme_sc != NVME_SC_SUCCESS) {
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
iod);
nvme_free_iod(dev, iod);
res = nvme_trans_status_code(hdr, nvme_sc);
goto out;
}
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
iod);
nvme_free_iod(dev, iod);
}
res = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
out:
return res;
}
/* 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 = SNTI_TRANSLATION_SUCCESS;
struct nvme_trans_io_cdb cdb_info;
u8 opcode = cmd[0];
u64 xfer_bytes;
u64 sum_iov_len = 0;
struct sg_iovec sgl;
int i;
size_t not_copied;
/* Extract Fields from CDB */
switch (opcode) {
case WRITE_6:
case READ_6:
nvme_trans_get_io_cdb6(cmd, &cdb_info);
break;
case WRITE_10:
case READ_10:
nvme_trans_get_io_cdb10(cmd, &cdb_info);
break;
case WRITE_12:
case READ_12:
nvme_trans_get_io_cdb12(cmd, &cdb_info);
break;
case WRITE_16:
case READ_16:
nvme_trans_get_io_cdb16(cmd, &cdb_info);
break;
default:
/* Will never really reach here */
res = SNTI_INTERNAL_ERROR;
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 != SNTI_TRANSLATION_SUCCESS)
goto out;
out:
return res;
}
static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
u8 evpd;
u8 page_code;
int alloc_len;
u8 *inq_response;
evpd = GET_INQ_EVPD_BIT(cmd);
page_code = GET_INQ_PAGE_CODE(cmd);
alloc_len = GET_INQ_ALLOC_LENGTH(cmd);
inq_response = kmalloc(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_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 = SNTI_TRANSLATION_SUCCESS;
u16 alloc_len;
u8 sp;
u8 pc;
u8 page_code;
sp = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_SP_OFFSET);
if (sp != 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;
}
pc = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_PC_OFFSET);
page_code = pc & LOG_SENSE_CDB_PAGE_CODE_MASK;
pc = (pc & 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_U16_FROM_CDB(cmd, LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET);
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)
{
int res = SNTI_TRANSLATION_SUCCESS;
u8 cdb10 = 0;
u16 parm_list_len;
u8 page_format;
u8 save_pages;
page_format = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_PAGE_FORMAT_OFFSET);
page_format &= MODE_SELECT_CDB_PAGE_FORMAT_MASK;
save_pages = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_SAVE_PAGES_OFFSET);
save_pages &= MODE_SELECT_CDB_SAVE_PAGES_MASK;
if (GET_OPCODE(cmd) == MODE_SELECT) {
parm_list_len = GET_U8_FROM_CDB(cmd,
MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET);
} else {
parm_list_len = GET_U16_FROM_CDB(cmd,
MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET);
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
*/
res = nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
page_format, save_pages, cdb10);
}
return res;
}
static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
u16 alloc_len;
u8 cdb10 = 0;
u8 page_code;
u8 pc;
if (GET_OPCODE(cmd) == MODE_SENSE) {
alloc_len = GET_U8_FROM_CDB(cmd, MODE_SENSE6_ALLOC_LEN_OFFSET);
} else {
alloc_len = GET_U16_FROM_CDB(cmd,
MODE_SENSE10_ALLOC_LEN_OFFSET);
cdb10 = 1;
}
pc = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CONTROL_OFFSET) &
MODE_SENSE_PAGE_CONTROL_MASK;
if (pc != 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;
}
page_code = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CODE_OFFSET) &
MODE_SENSE_PAGE_CODE_MASK;
switch (page_code) {
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)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
u32 alloc_len = READ_CAP_10_RESP_SIZE;
u32 resp_size = READ_CAP_10_RESP_SIZE;
u32 xfer_len;
u8 cdb16;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 *response;
cdb16 = IS_READ_CAP_16(cmd);
if (cdb16) {
alloc_len = GET_READ_CAP_16_ALLOC_LENGTH(cmd);
resp_size = READ_CAP_16_RESP_SIZE;
}
mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* 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_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ns = mem;
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
}
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_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
dma_addr);
out:
return res;
}
static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
u32 alloc_len, xfer_len, resp_size;
u8 select_report;
u8 *response;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ctrl *id_ctrl;
u32 ll_length, lun_id;
u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
__be32 tmp_len;
alloc_len = GET_REPORT_LUNS_ALLOC_LENGTH(cmd);
select_report = GET_U8_FROM_CDB(cmd, REPORT_LUNS_SR_OFFSET);
if ((select_report != ALL_LUNS_RETURNED) &&
(select_report != ALL_WELL_KNOWN_LUNS_RETURNED) &&
(select_report != RESTRICTED_LUNS_RETURNED)) {
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out;
} else {
/* NVMe Controller Identify */
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_id_ctrl),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
if (nvme_sc) {
res = nvme_sc;
goto out_dma;
}
id_ctrl = mem;
ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
resp_size = ll_length + LUN_DATA_HEADER_SIZE;
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_dma;
}
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* 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_dma:
dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
dma_addr);
out:
return res;
}
static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
u8 alloc_len, xfer_len, resp_size;
u8 desc_format;
u8 *response;
alloc_len = GET_REQUEST_SENSE_ALLOC_LENGTH(cmd);
desc_format = GET_U8_FROM_CDB(cmd, REQUEST_SENSE_DESC_OFFSET);
desc_format &= REQUEST_SENSE_DESC_MASK;
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_TYPE) {
/* 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_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
int nvme_sc;
struct nvme_command c;
u8 immed, pcmod, pc, no_flush, start;
immed = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_IMMED_OFFSET);
pcmod = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET);
pc = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_OFFSET);
no_flush = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_NO_FLUSH_OFFSET);
start = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_START_OFFSET);
immed &= START_STOP_UNIT_CDB_IMMED_MASK;
pcmod &= START_STOP_UNIT_CDB_POWER_COND_MOD_MASK;
pc = (pc & START_STOP_UNIT_CDB_POWER_COND_MASK) >> NIBBLE_SHIFT;
no_flush &= START_STOP_UNIT_CDB_NO_FLUSH_MASK;
start &= START_STOP_UNIT_CDB_START_MASK;
if (immed != 0) {
res = 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 */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
nvme_sc = nvme_submit_io_cmd(ns->dev, &c, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out;
if (nvme_sc) {
res = nvme_sc;
goto out;
}
}
/* Setup the expected power state transition */
res = nvme_trans_power_state(ns, hdr, pc, pcmod, start);
}
out:
return res;
}
static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
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_io_cmd(ns->dev, &c, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out;
if (nvme_sc)
res = nvme_sc;
out:
return res;
}
static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
u8 parm_hdr_len = 0;
u8 nvme_pf_code = 0;
u8 format_prot_info, long_list, format_data;
format_prot_info = GET_U8_FROM_CDB(cmd,
FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET);
long_list = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_LONG_LIST_OFFSET);
format_data = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET);
format_prot_info = (format_prot_info &
FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK) >>
FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT;
long_list &= FORMAT_UNIT_CDB_LONG_LIST_MASK;
format_data &= FORMAT_UNIT_CDB_FORMAT_DATA_MASK;
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 != SNTI_TRANSLATION_SUCCESS)
goto out;
}
/* Attempt to activate any previously downloaded firmware image */
res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw, 0, 0, 0);
/* Determine Block size and count and send format command */
res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
if (res != SNTI_TRANSLATION_SUCCESS)
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)
{
int res = SNTI_TRANSLATION_SUCCESS;
struct nvme_dev *dev = ns->dev;
if (!(readl(&dev->bar->csts) & NVME_CSTS_RDY))
res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
NOT_READY, SCSI_ASC_LUN_NOT_READY,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
else
res = nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
return res;
}
static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res = SNTI_TRANSLATION_SUCCESS;
u32 buffer_offset, parm_list_length;
u8 buffer_id, mode;
parm_list_length =
GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET);
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 = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_ID_OFFSET);
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 = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_MODE_OFFSET) &
WRITE_BUFFER_CDB_MODE_MASK;
buffer_offset =
GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET);
switch (mode) {
case DOWNLOAD_SAVE_ACTIVATE:
res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
parm_list_length, buffer_offset,
buffer_id);
if (res != SNTI_TRANSLATION_SUCCESS)
goto out;
res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
parm_list_length, buffer_offset,
buffer_id);
break;
case DOWNLOAD_SAVE_DEFER_ACTIVATE:
res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
parm_list_length, buffer_offset,
buffer_id);
break;
case ACTIVATE_DEFERRED_MICROCODE:
res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
parm_list_length, buffer_offset,
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 nvme_dev *dev = ns->dev;
struct scsi_unmap_parm_list *plist;
struct nvme_dsm_range *range;
struct nvme_command c;
int i, nvme_sc, res = -ENOMEM;
u16 ndesc, list_len;
dma_addr_t dma_addr;
list_len = GET_U16_FROM_CDB(cmd, UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET);
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 != SNTI_TRANSLATION_SUCCESS)
goto out;
ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
if (!ndesc || ndesc > 256) {
res = -EINVAL;
goto out;
}
range = dma_alloc_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
&dma_addr, GFP_KERNEL);
if (!range)
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.prp1 = cpu_to_le64(dma_addr);
c.dsm.nr = cpu_to_le32(ndesc - 1);
c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
dma_free_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
range, dma_addr);
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;
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);
break;
case SERVICE_ACTION_IN:
if (IS_READ_CAP_16(cmd))
retcode = nvme_trans_read_capacity(ns, hdr, cmd);
else
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, cmd);
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;
retcode = nvme_scsi_translate(ns, &hdr);
if (retcode < 0)
return retcode;
if (retcode > 0)
retcode = SNTI_TRANSLATION_SUCCESS;
if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
return -EFAULT;
return retcode;
}
#ifdef CONFIG_COMPAT
typedef struct sg_io_hdr32 {
compat_int_t interface_id; /* [i] 'S' for SCSI generic (required) */
compat_int_t dxfer_direction; /* [i] data transfer direction */
unsigned char cmd_len; /* [i] SCSI command length ( <= 16 bytes) */
unsigned char mx_sb_len; /* [i] max length to write to sbp */
unsigned short iovec_count; /* [i] 0 implies no scatter gather */
compat_uint_t dxfer_len; /* [i] byte count of data transfer */
compat_uint_t dxferp; /* [i], [*io] points to data transfer memory
or scatter gather list */
compat_uptr_t cmdp; /* [i], [*i] points to command to perform */
compat_uptr_t sbp; /* [i], [*o] points to sense_buffer memory */
compat_uint_t timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */
compat_uint_t flags; /* [i] 0 -> default, see SG_FLAG... */
compat_int_t pack_id; /* [i->o] unused internally (normally) */
compat_uptr_t usr_ptr; /* [i->o] unused internally */
unsigned char status; /* [o] scsi status */
unsigned char masked_status; /* [o] shifted, masked scsi status */
unsigned char msg_status; /* [o] messaging level data (optional) */
unsigned char sb_len_wr; /* [o] byte count actually written to sbp */
unsigned short host_status; /* [o] errors from host adapter */
unsigned short driver_status; /* [o] errors from software driver */
compat_int_t resid; /* [o] dxfer_len - actual_transferred */
compat_uint_t duration; /* [o] time taken by cmd (unit: millisec) */
compat_uint_t info; /* [o] auxiliary information */
} sg_io_hdr32_t; /* 64 bytes long (on sparc32) */
typedef struct sg_iovec32 {
compat_uint_t iov_base;
compat_uint_t iov_len;
} sg_iovec32_t;
static int sg_build_iovec(sg_io_hdr_t __user *sgio, void __user *dxferp, u16 iovec_count)
{
sg_iovec_t __user *iov = (sg_iovec_t __user *) (sgio + 1);
sg_iovec32_t __user *iov32 = dxferp;
int i;
for (i = 0; i < iovec_count; i++) {
u32 base, len;
if (get_user(base, &iov32[i].iov_base) ||
get_user(len, &iov32[i].iov_len) ||
put_user(compat_ptr(base), &iov[i].iov_base) ||
put_user(len, &iov[i].iov_len))
return -EFAULT;
}
if (put_user(iov, &sgio->dxferp))
return -EFAULT;
return 0;
}
int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg)
{
sg_io_hdr32_t __user *sgio32 = (sg_io_hdr32_t __user *)arg;
sg_io_hdr_t __user *sgio;
u16 iovec_count;
u32 data;
void __user *dxferp;
int err;
int interface_id;
if (get_user(interface_id, &sgio32->interface_id))
return -EFAULT;
if (interface_id != 'S')
return -EINVAL;
if (get_user(iovec_count, &sgio32->iovec_count))
return -EFAULT;
{
void __user *top = compat_alloc_user_space(0);
void __user *new = compat_alloc_user_space(sizeof(sg_io_hdr_t) +
(iovec_count * sizeof(sg_iovec_t)));
if (new > top)
return -EINVAL;
sgio = new;
}
/* Ok, now construct. */
if (copy_in_user(&sgio->interface_id, &sgio32->interface_id,
(2 * sizeof(int)) +
(2 * sizeof(unsigned char)) +
(1 * sizeof(unsigned short)) +
(1 * sizeof(unsigned int))))
return -EFAULT;
if (get_user(data, &sgio32->dxferp))
return -EFAULT;
dxferp = compat_ptr(data);
if (iovec_count) {
if (sg_build_iovec(sgio, dxferp, iovec_count))
return -EFAULT;
} else {
if (put_user(dxferp, &sgio->dxferp))
return -EFAULT;
}
{
unsigned char __user *cmdp;
unsigned char __user *sbp;
if (get_user(data, &sgio32->cmdp))
return -EFAULT;
cmdp = compat_ptr(data);
if (get_user(data, &sgio32->sbp))
return -EFAULT;
sbp = compat_ptr(data);
if (put_user(cmdp, &sgio->cmdp) ||
put_user(sbp, &sgio->sbp))
return -EFAULT;
}
if (copy_in_user(&sgio->timeout, &sgio32->timeout,
3 * sizeof(int)))
return -EFAULT;
if (get_user(data, &sgio32->usr_ptr))
return -EFAULT;
if (put_user(compat_ptr(data), &sgio->usr_ptr))
return -EFAULT;
err = nvme_sg_io(ns, sgio);
if (err >= 0) {
void __user *datap;
if (copy_in_user(&sgio32->pack_id, &sgio->pack_id,
sizeof(int)) ||
get_user(datap, &sgio->usr_ptr) ||
put_user((u32)(unsigned long)datap,
&sgio32->usr_ptr) ||
copy_in_user(&sgio32->status, &sgio->status,
(4 * sizeof(unsigned char)) +
(2 * sizeof(unsigned short)) +
(3 * sizeof(int))))
err = -EFAULT;
}
return err;
}
#endif
int nvme_sg_get_version_num(int __user *ip)
{
return put_user(sg_version_num, ip);
}
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