123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353 |
- #ifndef _IPXE_SCSI_H
- #define _IPXE_SCSI_H
-
- #include <stdint.h>
- #include <ipxe/uaccess.h>
- #include <ipxe/interface.h>
-
- /** @file
- *
- * SCSI devices
- *
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- /** Maximum block for READ/WRITE (10) commands */
- #define SCSI_MAX_BLOCK_10 0xffffffffULL
-
- /**
- * @defgroup scsiops SCSI operation codes
- * @{
- */
-
- #define SCSI_OPCODE_READ_10 0x28 /**< READ (10) */
- #define SCSI_OPCODE_READ_16 0x88 /**< READ (16) */
- #define SCSI_OPCODE_WRITE_10 0x2a /**< WRITE (10) */
- #define SCSI_OPCODE_WRITE_16 0x8a /**< WRITE (16) */
- #define SCSI_OPCODE_READ_CAPACITY_10 0x25 /**< READ CAPACITY (10) */
- #define SCSI_OPCODE_SERVICE_ACTION_IN 0x9e /**< SERVICE ACTION IN */
- #define SCSI_SERVICE_ACTION_READ_CAPACITY_16 0x10 /**< READ CAPACITY (16) */
- #define SCSI_OPCODE_TEST_UNIT_READY 0x00 /**< TEST UNIT READY */
-
- /** @} */
-
- /**
- * @defgroup scsiflags SCSI flags
- * @{
- */
-
- #define SCSI_FL_FUA_NV 0x02 /**< Force unit access to NVS */
- #define SCSI_FL_FUA 0x08 /**< Force unit access */
- #define SCSI_FL_DPO 0x10 /**< Disable cache page out */
-
- /** @} */
-
- /**
- * @defgroup scsicdbs SCSI command data blocks
- * @{
- */
-
- /** A SCSI "READ (10)" CDB */
- struct scsi_cdb_read_10 {
- /** Opcode (0x28) */
- uint8_t opcode;
- /** Flags */
- uint8_t flags;
- /** Start address
- *
- * This is a logical block number, in big-endian order.
- */
- uint32_t lba;
- /** Group number */
- uint8_t group;
- /** Transfer length
- *
- * This is a logical block count, in big-endian order.
- */
- uint16_t len;
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** A SCSI "READ (16)" CDB */
- struct scsi_cdb_read_16 {
- /** Opcode (0x88) */
- uint8_t opcode;
- /** Flags */
- uint8_t flags;
- /** Start address
- *
- * This is a logical block number, in big-endian order.
- */
- uint64_t lba;
- /** Transfer length
- *
- * This is a logical block count, in big-endian order.
- */
- uint32_t len;
- /** Group number */
- uint8_t group;
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** A SCSI "WRITE (10)" CDB */
- struct scsi_cdb_write_10 {
- /** Opcode (0x2a) */
- uint8_t opcode;
- /** Flags */
- uint8_t flags;
- /** Start address
- *
- * This is a logical block number, in big-endian order.
- */
- uint32_t lba;
- /** Group number */
- uint8_t group;
- /** Transfer length
- *
- * This is a logical block count, in big-endian order.
- */
- uint16_t len;
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** A SCSI "WRITE (16)" CDB */
- struct scsi_cdb_write_16 {
- /** Opcode (0x8a) */
- uint8_t opcode;
- /** Flags */
- uint8_t flags;
- /** Start address
- *
- * This is a logical block number, in big-endian order.
- */
- uint64_t lba;
- /** Transfer length
- *
- * This is a logical block count, in big-endian order.
- */
- uint32_t len;
- /** Group number */
- uint8_t group;
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** A SCSI "READ CAPACITY (10)" CDB */
- struct scsi_cdb_read_capacity_10 {
- /** Opcode (0x25) */
- uint8_t opcode;
- /** Reserved */
- uint8_t reserved_a;
- /** Logical block address
- *
- * Applicable only if the PMI bit is set.
- */
- uint32_t lba;
- /** Reserved */
- uint8_t reserved_b[3];
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** SCSI "READ CAPACITY (10)" parameter data */
- struct scsi_capacity_10 {
- /** Maximum logical block number */
- uint32_t lba;
- /** Block length in bytes */
- uint32_t blksize;
- } __attribute__ (( packed ));
-
- /** A SCSI "READ CAPACITY (16)" CDB */
- struct scsi_cdb_read_capacity_16 {
- /** Opcode (0x9e) */
- uint8_t opcode;
- /** Service action */
- uint8_t service_action;
- /** Logical block address
- *
- * Applicable only if the PMI bit is set.
- */
- uint64_t lba;
- /** Transfer length
- *
- * This is the size of the data-in buffer, in bytes.
- */
- uint32_t len;
- /** Reserved */
- uint8_t reserved;
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** SCSI "READ CAPACITY (16)" parameter data */
- struct scsi_capacity_16 {
- /** Maximum logical block number */
- uint64_t lba;
- /** Block length in bytes */
- uint32_t blksize;
- /** Reserved */
- uint8_t reserved[20];
- } __attribute__ (( packed ));
-
- /** A SCSI "TEST UNIT READY" CDB */
- struct scsi_cdb_test_unit_ready {
- /** Opcode (0x00) */
- uint8_t opcode;
- /** Reserved */
- uint8_t reserved[4];
- /** Control byte */
- uint8_t control;
- } __attribute__ (( packed ));
-
- /** A SCSI Command Data Block */
- union scsi_cdb {
- struct scsi_cdb_read_10 read10;
- struct scsi_cdb_read_16 read16;
- struct scsi_cdb_write_10 write10;
- struct scsi_cdb_write_16 write16;
- struct scsi_cdb_read_capacity_10 readcap10;
- struct scsi_cdb_read_capacity_16 readcap16;
- struct scsi_cdb_test_unit_ready testready;
- unsigned char bytes[16];
- };
-
- /** printf() format for dumping a scsi_cdb */
- #define SCSI_CDB_FORMAT "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:" \
- "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x"
-
- /** printf() parameters for dumping a scsi_cdb */
- #define SCSI_CDB_DATA(cdb) \
- (cdb).bytes[0], (cdb).bytes[1], (cdb).bytes[2], (cdb).bytes[3], \
- (cdb).bytes[4], (cdb).bytes[5], (cdb).bytes[6], (cdb).bytes[7], \
- (cdb).bytes[8], (cdb).bytes[9], (cdb).bytes[10], (cdb).bytes[11], \
- (cdb).bytes[12], (cdb).bytes[13], (cdb).bytes[14], (cdb).bytes[15]
-
- /** @} */
-
- /** A SCSI LUN
- *
- * This is a four-level LUN as specified by SAM-2, in big-endian
- * order.
- */
- struct scsi_lun {
- uint16_t u16[4];
- } __attribute__ (( packed ));
-
- /** printf() format for dumping a scsi_lun */
- #define SCSI_LUN_FORMAT "%04x-%04x-%04x-%04x"
-
- /** printf() parameters for dumping a scsi_lun */
- #define SCSI_LUN_DATA(lun) \
- ntohs ( (lun).u16[0] ), ntohs ( (lun).u16[1] ), \
- ntohs ( (lun).u16[2] ), ntohs ( (lun).u16[3] )
-
- /** A SCSI command information unit */
- struct scsi_cmd {
- /** LUN */
- struct scsi_lun lun;
- /** CDB for this command */
- union scsi_cdb cdb;
- /** Data-out buffer (may be NULL) */
- userptr_t data_out;
- /** Data-out buffer length
- *
- * Must be zero if @c data_out is NULL
- */
- size_t data_out_len;
- /** Data-in buffer (may be NULL) */
- userptr_t data_in;
- /** Data-in buffer length
- *
- * Must be zero if @c data_in is NULL
- */
- size_t data_in_len;
- };
-
- /** SCSI fixed-format sense data */
- struct scsi_sns_fixed {
- /** Response code */
- uint8_t code;
- /** Reserved */
- uint8_t reserved;
- /** Sense key */
- uint8_t key;
- /** Information */
- uint32_t info;
- /** Additional sense length */
- uint8_t len;
- /** Command-specific information */
- uint32_t cs_info;
- /** Additional sense code and qualifier */
- uint16_t additional;
- } __attribute__ (( packed ));
-
- /** SCSI descriptor-format sense data */
- struct scsi_sns_descriptor {
- /** Response code */
- uint8_t code;
- /** Sense key */
- uint8_t key;
- /** Additional sense code and qualifier */
- uint16_t additional;
- } __attribute__ (( packed ));
-
- /** SCSI sense data */
- union scsi_sns {
- /** Response code */
- uint8_t code;
- /** Fixed-format sense data */
- struct scsi_sns_fixed fixed;
- /** Descriptor-format sense data */
- struct scsi_sns_descriptor desc;
- };
-
- /** SCSI sense response code mask */
- #define SCSI_SENSE_CODE_MASK 0x7f
-
- /** Test if SCSI sense data is in fixed format
- *
- * @v code Response code
- * @ret is_fixed Sense data is in fixed format
- */
- #define SCSI_SENSE_FIXED( code ) ( ( (code) & 0x7e ) == 0x70 )
-
- /** SCSI sense key mask */
- #define SCSI_SENSE_KEY_MASK 0x0f
-
- /** A SCSI response information unit */
- struct scsi_rsp {
- /** SCSI status code */
- uint8_t status;
- /** Data overrun (or negative underrun) */
- ssize_t overrun;
- /** Autosense data (if any)
- *
- * To minimise code size, this is stored as the first four
- * bytes of a descriptor-format sense data block (even if the
- * response code indicates fixed-format sense data).
- */
- struct scsi_sns_descriptor sense;
- };
-
- extern int scsi_parse_lun ( const char *lun_string, struct scsi_lun *lun );
- extern void scsi_parse_sense ( const void *data, size_t len,
- struct scsi_sns_descriptor *sense );
-
- extern int scsi_command ( struct interface *control, struct interface *data,
- struct scsi_cmd *command );
- #define scsi_command_TYPE( object_type ) \
- typeof ( int ( object_type, struct interface *data, \
- struct scsi_cmd *command ) )
-
- extern void scsi_response ( struct interface *intf, struct scsi_rsp *response );
- #define scsi_response_TYPE( object_type ) \
- typeof ( void ( object_type, struct scsi_rsp *response ) )
-
- extern int scsi_open ( struct interface *block, struct interface *scsi,
- struct scsi_lun *lun );
-
- #endif /* _IPXE_SCSI_H */
|