diff options
author | Christoph Hellwig <hch@lst.de> | 2015-05-22 09:12:42 (GMT) |
---|---|---|
committer | Jens Axboe <axboe@fb.com> | 2015-05-22 14:36:38 (GMT) |
commit | 3726897efde1d7a43b6f966ab81b0c143a176556 (patch) | |
tree | b13c5930b11e506f498fb04f24385f192dc0ec7d /drivers/block/nvme-scsi.c | |
parent | e61b0a86cac83c3bf501705c8d52a0a29cecf091 (diff) | |
download | linux-3726897efde1d7a43b6f966ab81b0c143a176556.tar.xz |
nvme: first round at deobsfucating the SCSI translation code
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/nvme-scsi.c')
-rw-r--r-- | drivers/block/nvme-scsi.c | 326 |
1 files changed, 82 insertions, 244 deletions
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c index 390c46d..9fe0a2c 100644 --- a/drivers/block/nvme-scsi.c +++ b/drivers/block/nvme-scsi.c @@ -41,6 +41,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/types.h> +#include <asm/unaligned.h> #include <scsi/sg.h> #include <scsi/scsi.h> @@ -55,49 +56,14 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #define VPD_BLOCK_LIMITS 0xB0 #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 +/* format unit paramter list offsets */ #define FORMAT_UNIT_SHORT_PARM_LIST_LEN 4 #define FORMAT_UNIT_LONG_PARM_LIST_LEN 8 #define FORMAT_UNIT_PROT_INT_OFFSET 3 #define FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET 0 #define FORMAT_UNIT_PROT_FIELD_USAGE_MASK 0x07 -#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 @@ -145,22 +111,7 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #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 @@ -176,23 +127,14 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #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 @@ -218,14 +160,11 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #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 @@ -275,77 +214,11 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #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_16 && 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) - +/* copied from drivers/usb/gadget/function/storage_common.h */ +static inline u32 get_unaligned_be24(u8 *buf) +{ + return 0xffffff & (u32) get_unaligned_be32(buf - 1); +} /* Struct to gather data that needs to be extracted from a SCSI CDB. Not conforming to any particular CDB variant, but compatible with all. */ @@ -1334,9 +1207,10 @@ static int nvme_trans_mode_page_create(struct nvme_ns *ns, 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); + dbd = (cmd[1] & MODE_SENSE_DBD_MASK) >> MODE_SENSE_DBD_SHIFT; + llbaa = (cmd[1] & MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT; + mph_size = cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE; + blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa); resp_size = mph_size + blk_desc_len + mode_pages_tot_len; @@ -1896,46 +1770,39 @@ static inline void nvme_trans_get_io_cdb6(u8 *cmd, { 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); + cdb_info->lba = get_unaligned_be32(&cmd[0]) & IO_6_CDB_LBA_MASK; + cdb_info->xfer_len = cmd[4]; /* 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; + cdb_info->xfer_len = 256; } 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); + cdb_info->fua = cmd[1] & IO_CDB_FUA_MASK; + cdb_info->prot_info = cmd[1] & IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT; + cdb_info->lba = get_unaligned_be32(&cmd[2]); + cdb_info->xfer_len = get_unaligned_be16(&cmd[7]); } 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); + cdb_info->fua = cmd[1] & IO_CDB_FUA_MASK; + cdb_info->prot_info = cmd[1] & IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT; + cdb_info->lba = get_unaligned_be32(&cmd[2]); + cdb_info->xfer_len = get_unaligned_be32(&cmd[6]); } 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); + cdb_info->fua = cmd[1] & IO_CDB_FUA_MASK; + cdb_info->prot_info = cmd[1] & IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT; + cdb_info->lba = get_unaligned_be64(&cmd[2]); + cdb_info->xfer_len = get_unaligned_be32(&cmd[10]); } static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr, @@ -2148,9 +2015,9 @@ static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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); + evpd = cmd[1] & 0x01; + page_code = cmd[2]; + alloc_len = get_unaligned_be16(&cmd[3]); inq_response = kmalloc(alloc_len, GFP_KERNEL); if (inq_response == NULL) { @@ -2212,27 +2079,25 @@ static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr, { int res; 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) { + if (cmd[1] != LOG_SENSE_CDB_SP_NOT_ENABLED) { res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); goto out; } - 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; + + page_code = cmd[2] & LOG_SENSE_CDB_PAGE_CODE_MASK; + pc = (cmd[2] & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT; if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) { res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); goto out; } - alloc_len = GET_U16_FROM_CDB(cmd, LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET); + alloc_len = get_unaligned_be16(&cmd[7]); switch (page_code) { case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE: res = nvme_trans_log_supp_pages(ns, hdr, alloc_len); @@ -2262,18 +2127,13 @@ static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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; + page_format = cmd[1] & MODE_SELECT_CDB_PAGE_FORMAT_MASK; + save_pages = cmd[1] & MODE_SELECT_CDB_SAVE_PAGES_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); + if (cmd[0] == MODE_SELECT) { + parm_list_len = cmd[4]; } else { - parm_list_len = GET_U16_FROM_CDB(cmd, - MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET); + parm_list_len = cmd[7]; cdb10 = 1; } @@ -2295,29 +2155,23 @@ static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr, int res = 0; 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); + if (cmd[0] == MODE_SENSE) { + alloc_len = cmd[4]; } else { - alloc_len = GET_U16_FROM_CDB(cmd, - MODE_SENSE10_ALLOC_LEN_OFFSET); + alloc_len = get_unaligned_be16(&cmd[7]); 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) { + if ((cmd[2] & MODE_SENSE_PAGE_CONTROL_MASK) != + MODE_SENSE_PC_CURRENT_VALUES) { res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); goto out; } - page_code = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CODE_OFFSET) & - MODE_SENSE_PAGE_CODE_MASK; - switch (page_code) { + switch (cmd[2] & MODE_SENSE_PAGE_CODE_MASK) { case MODE_PAGE_CACHING: res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len, cdb10, @@ -2360,24 +2214,25 @@ static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr, } static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr, - u8 *cmd) + u8 *cmd, u8 cdb16) { int res; int nvme_sc; - u32 alloc_len = READ_CAP_10_RESP_SIZE; - u32 resp_size = READ_CAP_10_RESP_SIZE; + u32 alloc_len; + u32 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); + alloc_len = get_unaligned_be32(&cmd[10]); resp_size = READ_CAP_16_RESP_SIZE; + } else { + alloc_len = READ_CAP_10_RESP_SIZE; + resp_size = READ_CAP_10_RESP_SIZE; } mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns), @@ -2417,7 +2272,6 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr, int res; 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; @@ -2427,17 +2281,14 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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, + switch (cmd[2]) { + default: + return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); - goto out; - } else { + case ALL_LUNS_RETURNED: + case ALL_WELL_KNOWN_LUNS_RETURNED: + case RESTRICTED_LUNS_RETURNED: /* NVMe Controller Identify */ mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ctrl), &dma_addr, GFP_KERNEL); @@ -2454,6 +2305,7 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr, ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE; resp_size = ll_length + LUN_DATA_HEADER_SIZE; + alloc_len = get_unaligned_be32(&cmd[6]); if (alloc_len < resp_size) { res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, @@ -2500,9 +2352,8 @@ static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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; + desc_format = cmd[1] & 0x01; + alloc_len = cmd[4]; resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) : (FIXED_FMT_SENSE_DATA_SIZE)); @@ -2512,7 +2363,7 @@ static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr, goto out; } - if (desc_format == DESCRIPTOR_FORMAT_SENSE_DATA_TYPE) { + if (desc_format) { /* Descriptor Format Sense Data */ response[0] = DESC_FORMAT_SENSE_DATA; response[1] = NO_SENSE; @@ -2559,17 +2410,11 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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; + immed = cmd[1] & 0x01; + pcmod = cmd[3] & 0x0f; + pc = (cmd[4] & 0xf0) >> 4; + no_flush = cmd[4] & 0x04; + start = cmd[4] & 0x01; if (immed != 0) { return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, @@ -2614,16 +2459,9 @@ static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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; + format_prot_info = (cmd[1] & 0xc0) >> 6; + long_list = cmd[1] & 0x20; + format_data = cmd[1] & 0x10; if (format_data != 0) { if (format_prot_info != 0) { @@ -2686,8 +2524,7 @@ static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr, 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); + parm_list_length = get_unaligned_be24(&cmd[6]); if (parm_list_length % BYTES_TO_DWORDS != 0) { /* NVMe expects Firmware file to be a whole number of DWORDS */ res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, @@ -2695,17 +2532,15 @@ static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); goto out; } - buffer_id = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_ID_OFFSET); + buffer_id = cmd[2]; if (buffer_id > NVME_MAX_FIRMWARE_SLOT) { res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB, SCSI_ASCQ_CAUSE_NOT_REPORTABLE); goto out; } - mode = 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); + mode = cmd[1] & 0x1f; + buffer_offset = get_unaligned_be24(&cmd[3]); switch (mode) { case DOWNLOAD_SAVE_ACTIVATE: @@ -2759,7 +2594,7 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr, u16 ndesc, list_len; dma_addr_t dma_addr; - list_len = GET_U16_FROM_CDB(cmd, UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET); + list_len = get_unaligned_be16(&cmd[7]); if (!list_len) return -EINVAL; @@ -2853,13 +2688,16 @@ static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr) retcode = nvme_trans_mode_sense(ns, hdr, cmd); break; case READ_CAPACITY: - retcode = nvme_trans_read_capacity(ns, hdr, cmd); + retcode = nvme_trans_read_capacity(ns, hdr, cmd, 0); break; case SERVICE_ACTION_IN_16: - if (IS_READ_CAP_16(cmd)) - retcode = nvme_trans_read_capacity(ns, hdr, cmd); - else + switch (cmd[1]) { + case SAI_READ_CAPACITY_16: + retcode = nvme_trans_read_capacity(ns, hdr, cmd, 1); + break; + default: goto out; + } break; case REPORT_LUNS: retcode = nvme_trans_report_luns(ns, hdr, cmd); |