diff options
Diffstat (limited to 'src/include/ipxe/scsi.h')
| -rw-r--r-- | src/include/ipxe/scsi.h | 100 |
1 files changed, 57 insertions, 43 deletions
diff --git a/src/include/ipxe/scsi.h b/src/include/ipxe/scsi.h index b56ab7578..b90aa3aa0 100644 --- a/src/include/ipxe/scsi.h +++ b/src/include/ipxe/scsi.h @@ -2,9 +2,8 @@ #define _IPXE_SCSI_H #include <stdint.h> -#include <ipxe/blockdev.h> #include <ipxe/uaccess.h> -#include <ipxe/refcnt.h> +#include <ipxe/interface.h> /** @file * @@ -14,6 +13,9 @@ FILE_LICENCE ( GPL2_OR_LATER ); +/** Maximum block for READ/WRITE (10) commands */ +#define SCSI_MAX_BLOCK_10 0xffffffffULL + /** * @defgroup scsiops SCSI operation codes * @{ @@ -214,8 +216,27 @@ union scsi_cdb { /** @} */ -/** A SCSI command */ -struct scsi_command { +/** 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) */ @@ -232,50 +253,43 @@ struct scsi_command { * 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 )); +/** SCSI sense data */ +struct scsi_sns { + /** Response code */ + uint8_t code; + /** Reserved */ + uint8_t reserved; + /** Sense key */ + uint8_t key; + /** Information */ + uint32_t info; +}; -/** 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; +/** 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) */ + struct scsi_sns sense; }; -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 ); +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 */ |