--- /dev/null
+/*
+ * 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 <linux/version.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
+
+/* 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 = hdr->dxferp;
+
+ for (i = 0; i < hdr->iovec_count; i++) {
+ xfer_len = min(remaining, sgl[i].iov_len);
+ not_copied = copy_to_user(__user sgl[i].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(__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 = hdr->dxferp;
+
+ for (i = 0; i < hdr->iovec_count; i++) {
+ xfer_len = min(remaining, sgl[i].iov_len);
+ not_copied = copy_from_user(index,
+ __user sgl[i].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, __user 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(__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;
+ u32 tmp_id = cpu_to_be64(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;
+ u16 temp_k;
+
+ log_response = kmalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
+ if (log_response == NULL) {
+ res = -ENOMEM;
+ goto out_mem;
+ }
+ memset(log_response, 0, LOG_INFO_EXCP_PAGE_LENGTH);
+
+ 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) << 16) | NVME_GET_SMART_LOG_PAGE);
+ 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 = kmalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
+ if (log_response == NULL) {
+ res = -ENOMEM;
+ goto out_mem;
+ }
+ memset(log_response, 0, LOG_TEMP_PAGE_LENGTH);
+
+ 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) << 16) | NVME_GET_SMART_LOG_PAGE);
+ 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) {
+ u32 tmp_cap = cpu_to_be32(id_ns->ncap);
+ /* Byte 4 is reserved */
+ u32 tmp_len = cpu_to_be32(lba_length) & 0x00FFFFFF;
+
+ memcpy(resp, &tmp_cap, sizeof(u32));
+ memcpy(&resp[4], &tmp_len, sizeof(u32));
+ } else {
+ u64 tmp_cap = cpu_to_be64(id_ns->ncap);
+ u32 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 = kmalloc(resp_size, GFP_KERNEL);
+ if (response == NULL) {
+ res = -ENOMEM;
+ goto out_mem;
+ }
+ memset(response, 0, resp_size);
+
+ 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};
+ u64 tmp_rlba;
+ u32 tmp_rlba_32;
+ u32 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 = 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] */
+ /* min of desired state and (lps-1) because lps is STOP */
+ if (pcmod == 0x0)
+ ps_desired = min(POWER_STATE_1, (lowest_pow_st - 1));
+ else if (pcmod == 0x1)
+ ps_desired = min(POWER_STATE_2, (lowest_pow_st - 1));
+ else if (pcmod == 0x2)
+ ps_desired = min(POWER_STATE_3, (lowest_pow_st - 1));
+ break;
+ case NVME_POWER_STATE_STANDBY:
+ /* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
+ if (pcmod == 0x0)
+ ps_desired = max(0, (lowest_pow_st - 2));
+ else if (pcmod == 0x1)
+ ps_desired = max(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, &c.common, iod, tot_len,
+ GFP_KERNEL);
+ if (length != tot_len) {
+ res = -ENOMEM;
+ goto out_unmap;
+ }
+
+ c.dlfw.numd = (tot_len/BYTES_TO_DWORDS) - 1;
+ c.dlfw.offset = offset/BYTES_TO_DWORDS;
+ } else if (opcode == nvme_admin_activate_fw) {
+ c.common.cdw10[0] = buffer_id;
+ /* AA=01b Replace & activate at reset */
+ c.common.cdw10[0] |= 0x00000008;
+ }
+
+ 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 u16 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 = 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 != 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 = 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;
+ struct nvme_queue *nvmeq = get_nvmeq(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 *next_mapping_addr;
+ struct nvme_command c;
+ u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
+ u16 control;
+ u32 max_blocks = (dev->max_hw_sectors << 9) >> ns->lba_shift;
+
+ 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 = hdr->dxferp;
+
+ unit_len = sgl[i].iov_len;
+ unit_num_blocks = unit_len >> ns->lba_shift;
+ next_mapping_addr = sgl[i].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, &c.common, 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;
+ }
+
+ nvme_offset += unit_num_blocks;
+
+ nvmeq = get_nvmeq(dev);
+ /*
+ * Since nvme_submit_sync_cmd sleeps, we can't keep
+ * preemption disabled. We may be preempted at any
+ * point, and be rescheduled to a different CPU. That
+ * will cause cacheline bouncing, but no additional
+ * races since q_lock already protects against other
+ * CPUs.
+ */
+ put_nvmeq(nvmeq);
+ nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL,
+ NVME_IO_TIMEOUT);
+ 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;
+
+ /* 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) {
+ sgl = hdr->dxferp;
+ for (i = 0; i < hdr->iovec_count; i++) {
+ sum_iov_len += sgl[i].iov_len;
+ /* IO vector sizes should be multiples of block size */
+ if (sgl[i].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 = kmalloc(resp_size, GFP_KERNEL);
+ if (response == NULL) {
+ res = -ENOMEM;
+ goto out_dma;
+ }
+ memset(response, 0, resp_size);
+ 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;
+ u32 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 = 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 = kmalloc(resp_size, GFP_KERNEL);
+ if (response == NULL) {
+ res = -ENOMEM;
+ goto out_dma;
+ }
+ memset(response, 0, resp_size);
+
+ /* The first LUN ID will always be 0 per the SAM spec */
+ for (lun_id = 0; lun_id < id_ctrl->nn; lun_id++) {
+ /*
+ * Set the LUN Id and then increment to the next LUN
+ * location in the parameter data.
+ */
+ u64 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 = kmalloc(resp_size, GFP_KERNEL);
+ if (response == NULL) {
+ res = -ENOMEM;
+ goto out;
+ }
+ memset(response, 0, resp_size);
+
+ 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_queue *nvmeq = get_nvmeq(ns->dev);
+ 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 */
+ nvme_sc = nvme_submit_flush_data(nvmeq, ns);
+ put_nvmeq(nvmeq);
+ 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_queue *nvmeq = get_nvmeq(ns->dev);
+ put_nvmeq(nvmeq);
+ nvme_sc = nvme_submit_flush_data(nvmeq, ns);
+ 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;
+}
+
+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;
+ 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(__user u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
+ return -EFAULT;
+
+ return retcode;
+}
+
+int nvme_sg_get_version_num(int __user *ip)
+{
+ return put_user(sg_version_num, ip);
+}
projects / karo-tx-linux.git / commitdiff