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Automatically select between the "10" and "16" variants of command set,

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based on the device size.
This commit is contained in:
Michael Brown
2006-12-12 18:54:35 +00:00
parent 3bd7e479a2
commit a39b111684
2 changed files with 132 additions and 43 deletions
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48
src/include/gpxe/scsi.h
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@@ -16,7 +16,9 @@
* @{
*/
#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 */
@@ -40,6 +42,28 @@
* @{
*/
/** 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) */
@@ -62,6 +86,28 @@ struct scsi_cdb_read_16 {
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) */
@@ -143,7 +189,9 @@ struct scsi_capacity_16 {
/** 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;