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OvmfPkg/PvScsiDxe: Translate Target & LUN to/from DevicePath 

Implement EXT_SCSI_PASS_THRU.BuildDevicePath() and
EXT_SCSI_PASS_THRU.GetTargetLun().

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-8-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
This commit is contained in:
Liran Alon 2020-03-28 23:00:50 +03:00 committed by mergify[bot]
parent 7efce2e59c
commit 9c2d8281af
1 changed files with 59 additions and 2 deletions
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59
OvmfPkg/PvScsiDxe/PvScsi.c
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@ -137,7 +137,38 @@ PvScsiBuildDevicePath (
IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
) )
{ {
return EFI_UNSUPPORTED; UINT8 TargetValue;
PVSCSI_DEV *Dev;
SCSI_DEVICE_PATH *ScsiDevicePath;
if (DevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// We only use first byte of target identifer
//
TargetValue = *Target;
Dev = PVSCSI_FROM_PASS_THRU (This);
if (TargetValue > Dev->MaxTarget || Lun > Dev->MaxLun) {
return EFI_NOT_FOUND;
}
ScsiDevicePath = AllocatePool (sizeof (*ScsiDevicePath));
if (ScsiDevicePath == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ScsiDevicePath->Header.Type = MESSAGING_DEVICE_PATH;
ScsiDevicePath->Header.SubType = MSG_SCSI_DP;
ScsiDevicePath->Header.Length[0] = (UINT8)sizeof (*ScsiDevicePath);
ScsiDevicePath->Header.Length[1] = (UINT8)(sizeof (*ScsiDevicePath) >> 8);
ScsiDevicePath->Pun = TargetValue;
ScsiDevicePath->Lun = (UINT16)Lun;
*DevicePath = &ScsiDevicePath->Header;
return EFI_SUCCESS;
} }
STATIC STATIC
@ -150,7 +181,33 @@ PvScsiGetTargetLun (
OUT UINT64 *Lun OUT UINT64 *Lun
) )
{ {
SCSI_DEVICE_PATH *ScsiDevicePath;
PVSCSI_DEV *Dev;
if (DevicePath == NULL || Target == NULL || *Target == NULL || Lun == NULL) {
return EFI_INVALID_PARAMETER;
}
if (DevicePath->Type != MESSAGING_DEVICE_PATH ||
DevicePath->SubType != MSG_SCSI_DP) {
return EFI_UNSUPPORTED; return EFI_UNSUPPORTED;
}
ScsiDevicePath = (SCSI_DEVICE_PATH *)DevicePath;
Dev = PVSCSI_FROM_PASS_THRU (This);
if (ScsiDevicePath->Pun > Dev->MaxTarget ||
ScsiDevicePath->Lun > Dev->MaxLun) {
return EFI_NOT_FOUND;
}
//
// We only use first byte of target identifer
//
**Target = (UINT8)ScsiDevicePath->Pun;
ZeroMem (*Target + 1, TARGET_MAX_BYTES - 1);
*Lun = ScsiDevicePath->Lun;
return EFI_SUCCESS;
} }
STATIC STATIC