[PATCH 06/14] OvmfPkg/MptScsiDxe: Report one Target and one LUN

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

Support for multiple targets will be implemented in a later commit in
this series.

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 | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/OvmfPkg/MptScsiDxe/MptScsi.c b/OvmfPkg/MptScsiDxe/MptScsi.c
index 6b655d9fe8..8ce7986b1d 100644
--- a/OvmfPkg/MptScsiDxe/MptScsi.c
+++ b/OvmfPkg/MptScsiDxe/MptScsi.c
@@ -68,6 +68,21 @@ MptScsiPassThru (
   return EFI_UNSUPPORTED;
 }
 
+STATIC
+BOOLEAN
+IsTargetInitialized (
+  IN UINT8                                          *Target
+  )
+{
+  int i;
+  for (i = 0; i < TARGET_MAX_BYTES; ++i) {
+    if (Target[i] != 0xFF) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
 STATIC
 EFI_STATUS
 EFIAPI
@@ -78,7 +93,15 @@ MptScsiGetNextTargetLun (
   )
 {
   DEBUG ((EFI_D_INFO, "MptScsiGetNextTargetLun %d %d\n", **Target, *Lun));
-  return EFI_UNSUPPORTED;
+
+  // Currently support only target 0 LUN 0, so hardcode it
+  if (!IsTargetInitialized (*Target)) {
+    **Target = 0;
+    *Lun = 0;
+    return EFI_SUCCESS;
+  } else {
+    return EFI_NOT_FOUND;
+  }
 }
 
 STATIC
@@ -90,7 +113,14 @@ MptScsiGetNextTarget (
   )
 {
   DEBUG ((EFI_D_INFO, "MptScsiGetNextTarget\n"));
-  return EFI_UNSUPPORTED;
+
+  // Currently support only target 0 LUN 0, so hardcode it
+  if (!IsTargetInitialized (*Target)) {
+    **Target = 0;
+    return EFI_SUCCESS;
+  } else {
+    return EFI_NOT_FOUND;
+  }
 }
 
 STATIC
-- 
2.20.1