| /* |
| * This header file contains public constants and structures used by |
| * the scsi code for linux. |
| * |
| * For documentation on the OPCODES, MESSAGES, and SENSE values, |
| * please consult the SCSI standard. |
| */ |
| #ifndef _SCSI_SCSI_H |
| #define _SCSI_SCSI_H |
| |
| #include <linux/types.h> |
| #include <scsi/scsi_cmnd.h> |
| |
| /* |
| * The maximum number of SG segments that we will put inside a |
| * scatterlist (unless chaining is used). Should ideally fit inside a |
| * single page, to avoid a higher order allocation. We could define this |
| * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The |
| * minimum value is 32 |
| */ |
| #define SCSI_MAX_SG_SEGMENTS 128 |
| |
| /* |
| * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit |
| * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. |
| */ |
| #ifdef ARCH_HAS_SG_CHAIN |
| #define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 |
| #else |
| #define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS |
| #endif |
| |
| /* |
| * Special value for scanning to specify scanning or rescanning of all |
| * possible channels, (target) ids, or luns on a given shost. |
| */ |
| #define SCAN_WILD_CARD ~0 |
| |
| /* |
| * SCSI opcodes |
| */ |
| |
| #define TEST_UNIT_READY 0x00 |
| #define REZERO_UNIT 0x01 |
| #define REQUEST_SENSE 0x03 |
| #define FORMAT_UNIT 0x04 |
| #define READ_BLOCK_LIMITS 0x05 |
| #define REASSIGN_BLOCKS 0x07 |
| #define INITIALIZE_ELEMENT_STATUS 0x07 |
| #define READ_6 0x08 |
| #define WRITE_6 0x0a |
| #define SEEK_6 0x0b |
| #define READ_REVERSE 0x0f |
| #define WRITE_FILEMARKS 0x10 |
| #define SPACE 0x11 |
| #define INQUIRY 0x12 |
| #define RECOVER_BUFFERED_DATA 0x14 |
| #define MODE_SELECT 0x15 |
| #define RESERVE 0x16 |
| #define RELEASE 0x17 |
| #define COPY 0x18 |
| #define ERASE 0x19 |
| #define MODE_SENSE 0x1a |
| #define START_STOP 0x1b |
| #define RECEIVE_DIAGNOSTIC 0x1c |
| #define SEND_DIAGNOSTIC 0x1d |
| #define ALLOW_MEDIUM_REMOVAL 0x1e |
| |
| #define SET_WINDOW 0x24 |
| #define READ_CAPACITY 0x25 |
| #define READ_10 0x28 |
| #define WRITE_10 0x2a |
| #define SEEK_10 0x2b |
| #define POSITION_TO_ELEMENT 0x2b |
| #define WRITE_VERIFY 0x2e |
| #define VERIFY 0x2f |
| #define SEARCH_HIGH 0x30 |
| #define SEARCH_EQUAL 0x31 |
| #define SEARCH_LOW 0x32 |
| #define SET_LIMITS 0x33 |
| #define PRE_FETCH 0x34 |
| #define READ_POSITION 0x34 |
| #define SYNCHRONIZE_CACHE 0x35 |
| #define LOCK_UNLOCK_CACHE 0x36 |
| #define READ_DEFECT_DATA 0x37 |
| #define MEDIUM_SCAN 0x38 |
| #define COMPARE 0x39 |
| #define COPY_VERIFY 0x3a |
| #define WRITE_BUFFER 0x3b |
| #define READ_BUFFER 0x3c |
| #define UPDATE_BLOCK 0x3d |
| #define READ_LONG 0x3e |
| #define WRITE_LONG 0x3f |
| #define CHANGE_DEFINITION 0x40 |
| #define WRITE_SAME 0x41 |
| #define READ_TOC 0x43 |
| #define LOG_SELECT 0x4c |
| #define LOG_SENSE 0x4d |
| #define XDWRITEREAD_10 0x53 |
| #define MODE_SELECT_10 0x55 |
| #define RESERVE_10 0x56 |
| #define RELEASE_10 0x57 |
| #define MODE_SENSE_10 0x5a |
| #define PERSISTENT_RESERVE_IN 0x5e |
| #define PERSISTENT_RESERVE_OUT 0x5f |
| #define VARIABLE_LENGTH_CMD 0x7f |
| #define REPORT_LUNS 0xa0 |
| #define MAINTENANCE_IN 0xa3 |
| #define MAINTENANCE_OUT 0xa4 |
| #define MOVE_MEDIUM 0xa5 |
| #define EXCHANGE_MEDIUM 0xa6 |
| #define READ_12 0xa8 |
| #define WRITE_12 0xaa |
| #define WRITE_VERIFY_12 0xae |
| #define SEARCH_HIGH_12 0xb0 |
| #define SEARCH_EQUAL_12 0xb1 |
| #define SEARCH_LOW_12 0xb2 |
| #define READ_ELEMENT_STATUS 0xb8 |
| #define SEND_VOLUME_TAG 0xb6 |
| #define WRITE_LONG_2 0xea |
| #define READ_16 0x88 |
| #define WRITE_16 0x8a |
| #define VERIFY_16 0x8f |
| #define SERVICE_ACTION_IN 0x9e |
| /* values for service action in */ |
| #define SAI_READ_CAPACITY_16 0x10 |
| /* values for maintenance in */ |
| #define MI_REPORT_TARGET_PGS 0x0a |
| /* values for maintenance out */ |
| #define MO_SET_TARGET_PGS 0x0a |
| |
| /* Values for T10/04-262r7 */ |
| #define ATA_16 0x85 /* 16-byte pass-thru */ |
| #define ATA_12 0xa1 /* 12-byte pass-thru */ |
| |
| /* |
| * SCSI command lengths |
| */ |
| |
| #define SCSI_MAX_VARLEN_CDB_SIZE 260 |
| |
| /* defined in T10 SCSI Primary Commands-2 (SPC2) */ |
| struct scsi_varlen_cdb_hdr { |
| u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ |
| u8 control; |
| u8 misc[5]; |
| u8 additional_cdb_length; /* total cdb length - 8 */ |
| __be16 service_action; |
| /* service specific data follows */ |
| }; |
| |
| static inline unsigned |
| scsi_varlen_cdb_length(const void *hdr) |
| { |
| return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; |
| } |
| |
| extern const unsigned char scsi_command_size_tbl[8]; |
| #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] |
| |
| static inline unsigned |
| scsi_command_size(const unsigned char *cmnd) |
| { |
| return (cmnd[0] == VARIABLE_LENGTH_CMD) ? |
| scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); |
| } |
| |
| /* |
| * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft |
| * T10/1561-D Revision 4 Draft dated 7th November 2002. |
| */ |
| #define SAM_STAT_GOOD 0x00 |
| #define SAM_STAT_CHECK_CONDITION 0x02 |
| #define SAM_STAT_CONDITION_MET 0x04 |
| #define SAM_STAT_BUSY 0x08 |
| #define SAM_STAT_INTERMEDIATE 0x10 |
| #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14 |
| #define SAM_STAT_RESERVATION_CONFLICT 0x18 |
| #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */ |
| #define SAM_STAT_TASK_SET_FULL 0x28 |
| #define SAM_STAT_ACA_ACTIVE 0x30 |
| #define SAM_STAT_TASK_ABORTED 0x40 |
| |
| /** scsi_status_is_good - check the status return. |
| * |
| * @status: the status passed up from the driver (including host and |
| * driver components) |
| * |
| * This returns true for known good conditions that may be treated as |
| * command completed normally |
| */ |
| static inline int scsi_status_is_good(int status) |
| { |
| /* |
| * FIXME: bit0 is listed as reserved in SCSI-2, but is |
| * significant in SCSI-3. For now, we follow the SCSI-2 |
| * behaviour and ignore reserved bits. |
| */ |
| status &= 0xfe; |
| return ((status == SAM_STAT_GOOD) || |
| (status == SAM_STAT_INTERMEDIATE) || |
| (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) || |
| /* FIXME: this is obsolete in SAM-3 */ |
| (status == SAM_STAT_COMMAND_TERMINATED)); |
| } |
| |
| /* |
| * Status codes. These are deprecated as they are shifted 1 bit right |
| * from those found in the SCSI standards. This causes confusion for |
| * applications that are ported to several OSes. Prefer SAM Status codes |
| * above. |
| */ |
| |
| #define GOOD 0x00 |
| #define CHECK_CONDITION 0x01 |
| #define CONDITION_GOOD 0x02 |
| #define BUSY 0x04 |
| #define INTERMEDIATE_GOOD 0x08 |
| #define INTERMEDIATE_C_GOOD 0x0a |
| #define RESERVATION_CONFLICT 0x0c |
| #define COMMAND_TERMINATED 0x11 |
| #define QUEUE_FULL 0x14 |
| #define ACA_ACTIVE 0x18 |
| #define TASK_ABORTED 0x20 |
| |
| #define STATUS_MASK 0xfe |
| |
| /* |
| * SENSE KEYS |
| */ |
| |
| #define NO_SENSE 0x00 |
| #define RECOVERED_ERROR 0x01 |
| #define NOT_READY 0x02 |
| #define MEDIUM_ERROR 0x03 |
| #define HARDWARE_ERROR 0x04 |
| #define ILLEGAL_REQUEST 0x05 |
| #define UNIT_ATTENTION 0x06 |
| #define DATA_PROTECT 0x07 |
| #define BLANK_CHECK 0x08 |
| #define COPY_ABORTED 0x0a |
| #define ABORTED_COMMAND 0x0b |
| #define VOLUME_OVERFLOW 0x0d |
| #define MISCOMPARE 0x0e |
| |
| |
| /* |
| * DEVICE TYPES |
| * Please keep them in 0x%02x format for $MODALIAS to work |
| */ |
| |
| #define TYPE_DISK 0x00 |
| #define TYPE_TAPE 0x01 |
| #define TYPE_PRINTER 0x02 |
| #define TYPE_PROCESSOR 0x03 /* HP scanners use this */ |
| #define TYPE_WORM 0x04 /* Treated as ROM by our system */ |
| #define TYPE_ROM 0x05 |
| #define TYPE_SCANNER 0x06 |
| #define TYPE_MOD 0x07 /* Magneto-optical disk - |
| * - treated as TYPE_DISK */ |
| #define TYPE_MEDIUM_CHANGER 0x08 |
| #define TYPE_COMM 0x09 /* Communications device */ |
| #define TYPE_RAID 0x0c |
| #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ |
| #define TYPE_RBC 0x0e |
| #define TYPE_OSD 0x11 |
| #define TYPE_NO_LUN 0x7f |
| |
| /* SCSI protocols; these are taken from SPC-3 section 7.5 */ |
| enum scsi_protocol { |
| SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ |
| SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ |
| SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ |
| SCSI_PROTOCOL_SBP = 3, /* firewire */ |
| SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ |
| SCSI_PROTOCOL_ISCSI = 5, |
| SCSI_PROTOCOL_SAS = 6, |
| SCSI_PROTOCOL_ADT = 7, /* Media Changers */ |
| SCSI_PROTOCOL_ATA = 8, |
| SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ |
| }; |
| |
| /* Returns a human-readable name for the device */ |
| extern const char * scsi_device_type(unsigned type); |
| |
| /* |
| * standard mode-select header prepended to all mode-select commands |
| */ |
| |
| struct ccs_modesel_head { |
| __u8 _r1; /* reserved */ |
| __u8 medium; /* device-specific medium type */ |
| __u8 _r2; /* reserved */ |
| __u8 block_desc_length; /* block descriptor length */ |
| __u8 density; /* device-specific density code */ |
| __u8 number_blocks_hi; /* number of blocks in this block desc */ |
| __u8 number_blocks_med; |
| __u8 number_blocks_lo; |
| __u8 _r3; |
| __u8 block_length_hi; /* block length for blocks in this desc */ |
| __u8 block_length_med; |
| __u8 block_length_lo; |
| }; |
| |
| /* |
| * ScsiLun: 8 byte LUN. |
| */ |
| struct scsi_lun { |
| __u8 scsi_lun[8]; |
| }; |
| |
| /* |
| * The Well Known LUNS (SAM-3) in our int representation of a LUN |
| */ |
| #define SCSI_W_LUN_BASE 0xc100 |
| #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) |
| #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) |
| #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) |
| |
| static inline int scsi_is_wlun(unsigned int lun) |
| { |
| return (lun & 0xff00) == SCSI_W_LUN_BASE; |
| } |
| |
| |
| /* |
| * MESSAGE CODES |
| */ |
| |
| #define COMMAND_COMPLETE 0x00 |
| #define EXTENDED_MESSAGE 0x01 |
| #define EXTENDED_MODIFY_DATA_POINTER 0x00 |
| #define EXTENDED_SDTR 0x01 |
| #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ |
| #define EXTENDED_WDTR 0x03 |
| #define EXTENDED_PPR 0x04 |
| #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 |
| #define SAVE_POINTERS 0x02 |
| #define RESTORE_POINTERS 0x03 |
| #define DISCONNECT 0x04 |
| #define INITIATOR_ERROR 0x05 |
| #define ABORT_TASK_SET 0x06 |
| #define MESSAGE_REJECT 0x07 |
| #define NOP 0x08 |
| #define MSG_PARITY_ERROR 0x09 |
| #define LINKED_CMD_COMPLETE 0x0a |
| #define LINKED_FLG_CMD_COMPLETE 0x0b |
| #define TARGET_RESET 0x0c |
| #define ABORT_TASK 0x0d |
| #define CLEAR_TASK_SET 0x0e |
| #define INITIATE_RECOVERY 0x0f /* SCSI-II only */ |
| #define RELEASE_RECOVERY 0x10 /* SCSI-II only */ |
| #define CLEAR_ACA 0x16 |
| #define LOGICAL_UNIT_RESET 0x17 |
| #define SIMPLE_QUEUE_TAG 0x20 |
| #define HEAD_OF_QUEUE_TAG 0x21 |
| #define ORDERED_QUEUE_TAG 0x22 |
| #define IGNORE_WIDE_RESIDUE 0x23 |
| #define ACA 0x24 |
| #define QAS_REQUEST 0x55 |
| |
| /* Old SCSI2 names, don't use in new code */ |
| #define BUS_DEVICE_RESET TARGET_RESET |
| #define ABORT ABORT_TASK_SET |
| |
| /* |
| * Host byte codes |
| */ |
| |
| #define DID_OK 0x00 /* NO error */ |
| #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ |
| #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ |
| #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ |
| #define DID_BAD_TARGET 0x04 /* BAD target. */ |
| #define DID_ABORT 0x05 /* Told to abort for some other reason */ |
| #define DID_PARITY 0x06 /* Parity error */ |
| #define DID_ERROR 0x07 /* Internal error */ |
| #define DID_RESET 0x08 /* Reset by somebody. */ |
| #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ |
| #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ |
| #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ |
| #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ |
| #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also |
| * without decrementing the retry count */ |
| #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution |
| * and the driver blocked the port to |
| * recover the link. Transport class will |
| * retry or fail IO */ |
| #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ |
| #define DRIVER_OK 0x00 /* Driver status */ |
| |
| /* |
| * These indicate the error that occurred, and what is available. |
| */ |
| |
| #define DRIVER_BUSY 0x01 |
| #define DRIVER_SOFT 0x02 |
| #define DRIVER_MEDIA 0x03 |
| #define DRIVER_ERROR 0x04 |
| |
| #define DRIVER_INVALID 0x05 |
| #define DRIVER_TIMEOUT 0x06 |
| #define DRIVER_HARD 0x07 |
| #define DRIVER_SENSE 0x08 |
| |
| /* |
| * Internal return values. |
| */ |
| |
| #define NEEDS_RETRY 0x2001 |
| #define SUCCESS 0x2002 |
| #define FAILED 0x2003 |
| #define QUEUED 0x2004 |
| #define SOFT_ERROR 0x2005 |
| #define ADD_TO_MLQUEUE 0x2006 |
| #define TIMEOUT_ERROR 0x2007 |
| #define SCSI_RETURN_NOT_HANDLED 0x2008 |
| |
| /* |
| * Midlevel queue return values. |
| */ |
| #define SCSI_MLQUEUE_HOST_BUSY 0x1055 |
| #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 |
| #define SCSI_MLQUEUE_EH_RETRY 0x1057 |
| #define SCSI_MLQUEUE_TARGET_BUSY 0x1058 |
| |
| /* |
| * Use these to separate status msg and our bytes |
| * |
| * These are set by: |
| * |
| * status byte = set from target device |
| * msg_byte = return status from host adapter itself. |
| * host_byte = set by low-level driver to indicate status. |
| * driver_byte = set by mid-level. |
| */ |
| #define status_byte(result) (((result) >> 1) & 0x7f) |
| #define msg_byte(result) (((result) >> 8) & 0xff) |
| #define host_byte(result) (((result) >> 16) & 0xff) |
| #define driver_byte(result) (((result) >> 24) & 0xff) |
| |
| static inline void set_msg_byte(struct scsi_cmnd *cmd, char status) |
| { |
| cmd->result |= status << 8; |
| } |
| |
| static inline void set_host_byte(struct scsi_cmnd *cmd, char status) |
| { |
| cmd->result |= status << 16; |
| } |
| |
| static inline void set_driver_byte(struct scsi_cmnd *cmd, char status) |
| { |
| cmd->result |= status << 24; |
| } |
| |
| |
| #define sense_class(sense) (((sense) >> 4) & 0x7) |
| #define sense_error(sense) ((sense) & 0xf) |
| #define sense_valid(sense) ((sense) & 0x80); |
| |
| /* |
| * default timeouts |
| */ |
| #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) |
| #define START_STOP_TIMEOUT (60 * HZ) |
| #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) |
| #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) |
| #define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) |
| |
| |
| #define IDENTIFY_BASE 0x80 |
| #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ |
| ((can_disconnect) ? 0x40 : 0) |\ |
| ((lun) & 0x07)) |
| |
| /* |
| * struct scsi_device::scsi_level values. For SCSI devices other than those |
| * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) |
| * where "resp" is a byte array of the response to an INQUIRY. The scsi_level |
| * variable is visible to the user via sysfs. |
| */ |
| |
| #define SCSI_UNKNOWN 0 |
| #define SCSI_1 1 |
| #define SCSI_1_CCS 2 |
| #define SCSI_2 3 |
| #define SCSI_3 4 /* SPC */ |
| #define SCSI_SPC_2 5 |
| #define SCSI_SPC_3 6 |
| |
| /* |
| * INQ PERIPHERAL QUALIFIERS |
| */ |
| #define SCSI_INQ_PQ_CON 0x00 |
| #define SCSI_INQ_PQ_NOT_CON 0x01 |
| #define SCSI_INQ_PQ_NOT_CAP 0x03 |
| |
| |
| /* |
| * Here are some scsi specific ioctl commands which are sometimes useful. |
| * |
| * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 |
| */ |
| |
| /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ |
| #define SCSI_IOCTL_GET_IDLUN 0x5382 |
| |
| /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ |
| |
| /* Used to obtain the host number of a device. */ |
| #define SCSI_IOCTL_PROBE_HOST 0x5385 |
| |
| /* Used to obtain the bus number for a device */ |
| #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 |
| |
| /* Used to obtain the PCI location of a device */ |
| #define SCSI_IOCTL_GET_PCI 0x5387 |
| |
| /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ |
| static inline __u32 scsi_to_u32(__u8 *ptr) |
| { |
| return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; |
| } |
| |
| #endif /* _SCSI_SCSI_H */ |