Intel Extensible Firmware Interface - Manual (Page 530)

Extensible Firmware Interface Specification
13-10 12/01/02 Version 1.10
EFI_SCSI_PASS_THRU_PROTOCOL.GetNextDevice()
Summary
Used to retrieve the list of legal Target IDs and LUNs for SCSI devices on a SCSI channel. These
can either be the list SCSI devices that are actually present on the SCSI channel, or the list of legal
Target Ids and LUNs for the SCSI channel. Regardless, the caller of this function must probe the
Target ID and LUN returned to see if a SCSI device is actually present at that location on the SCSI
channel.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_SCSI_PASS_THRU_GET_NEXT_DEVICE) (
IN EFI_SCSI_PASS_THRU_PROTOCOL
*This,
IN OUT UINT32 *Target,
IN OUT UINT64 *Lun
);
Parameters
This A pointer to the EFI_SCSI_PASS_THRU_PROTOCOL
instance. Type EFI_SCSI_PASS_THRU_PROTOCOL is
defined in Section 13.1.
Target On input, a pointer to the Target ID of a SCSI device present on
the SCSI channel. On output, a pointer to the Target ID of the
next SCSI device present on a SCSI channel. An input value of
0xFFFFFFFF retrieves the Target ID of the first SCSI device
present on a SCSI channel.
Lun On input, a pointer to the LUN of a SCSI device present on the
SCSI channel. On output, a pointer to the LUN of the next SCSI
device present on a SCSI channel.