[PATCH 07/14] OvmfPkg/MptScsiDxe: Build DevicePath for discovered devices

[Nikita Leshenko <nikita.leshchenko@oracle.com>]

Used to identify the individual disks in the hardware tree

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Aaron Young <aaron.young@oracle.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
---
 OvmfPkg/MptScsiDxe/MptScsi.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/OvmfPkg/MptScsiDxe/MptScsi.c b/OvmfPkg/MptScsiDxe/MptScsi.c
index 8ce7986b1d..7f360158e7 100644
--- a/OvmfPkg/MptScsiDxe/MptScsi.c
+++ b/OvmfPkg/MptScsiDxe/MptScsi.c
@@ -133,8 +133,24 @@ MptScsiBuildDevicePath (
   IN OUT EFI_DEVICE_PATH_PROTOCOL                  **DevicePath
   )
 {
+  SCSI_DEVICE_PATH *ScsiDevicePath;
+
   DEBUG ((EFI_D_INFO, "MptScsiBuildDevicePath %d %d\n", *Target, Lun));
-  return EFI_UNSUPPORTED;
+
+  ScsiDevicePath = AllocateZeroPool (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              = *Target;
+  ScsiDevicePath->Lun              = (UINT16) Lun;
+
+  *DevicePath = &ScsiDevicePath->Header;
+  return EFI_SUCCESS;
 }
 
 STATIC
-- 
2.20.1