#ifndef _GPXE_SCSI_H #define _GPXE_SCSI_H #include #include #include #include /** @file * * SCSI devices * */ FILE_LICENCE ( GPL2_OR_LATER ); /** * @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) */ /** @} */ /** * @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 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; 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 command */ struct scsi_command { /** 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 status code */ uint8_t status; /** SCSI sense response code */ uint8_t sense_response; /** Command status code */ int rc; }; /** 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 )); /** A SCSI device */ struct scsi_device { /** Block device interface */ struct block_device blockdev; /** * Issue SCSI command * * @v scsi SCSI device * @v command SCSI command * @ret rc Return status code * * Note that a successful return status code indicates only * that the SCSI command was issued. The caller must check * the status field in the command structure to see when the * command completes and whether, for example, the device * returned CHECK CONDITION or some other non-success status * code. */ int ( * command ) ( struct scsi_device *scsi, struct scsi_command *command ); /** Backing device */ struct refcnt *backend; }; extern int scsi_detached_command ( struct scsi_device *scsi, struct scsi_command *command ); extern int init_scsidev ( struct scsi_device *scsi ); extern int scsi_parse_lun ( const char *lun_string, struct scsi_lun *lun ); #endif /* _GPXE_SCSI_H */