[PATCH v3 06/13] 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.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2390
Signed-off-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
---
 OvmfPkg/MptScsiDxe/MptScsi.c      | 38 +++++++++++++++++++++++++++++--
 OvmfPkg/MptScsiDxe/MptScsiDxe.inf |  1 +
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/OvmfPkg/MptScsiDxe/MptScsi.c b/OvmfPkg/MptScsiDxe/MptScsi.c
index 9598b82fda53..e898a6024f73 100644
--- a/OvmfPkg/MptScsiDxe/MptScsi.c
+++ b/OvmfPkg/MptScsiDxe/MptScsi.c
@@ -17,6 +17,7 @@
 
 #include <IndustryStandard/FusionMptScsi.h>
 #include <IndustryStandard/Pci.h>
+#include <Library/BaseMemoryLib.h>
 #include <Library/DebugLib.h>
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiBootServicesTableLib.h>
@@ -62,6 +63,22 @@ MptScsiPassThru (
   return EFI_UNSUPPORTED;
 }
 
+STATIC
+BOOLEAN
+IsTargetInitialized (
+  IN UINT8                                          *Target
+  )
+{
+  UINTN Idx;
+
+  for (Idx = 0; Idx < TARGET_MAX_BYTES; ++Idx) {
+    if (Target[Idx] != 0xFF) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
 STATIC
 EFI_STATUS
 EFIAPI
@@ -71,7 +88,16 @@ MptScsiGetNextTargetLun (
   IN OUT UINT64                                     *Lun
   )
 {
-  return EFI_UNSUPPORTED;
+  //
+  // Currently support only target 0 LUN 0, so hardcode it
+  //
+  if (!IsTargetInitialized (*Target)) {
+    ZeroMem (*Target, TARGET_MAX_BYTES);
+    *Lun = 0;
+    return EFI_SUCCESS;
+  } else {
+    return EFI_NOT_FOUND;
+  }
 }
 
 STATIC
@@ -82,7 +108,15 @@ MptScsiGetNextTarget (
   IN OUT UINT8                                     **Target
   )
 {
-  return EFI_UNSUPPORTED;
+  //
+  // Currently support only target 0 LUN 0, so hardcode it
+  //
+  if (!IsTargetInitialized (*Target)) {
+    ZeroMem (*Target, TARGET_MAX_BYTES);
+    return EFI_SUCCESS;
+  } else {
+    return EFI_NOT_FOUND;
+  }
 }
 
 STATIC
diff --git a/OvmfPkg/MptScsiDxe/MptScsiDxe.inf b/OvmfPkg/MptScsiDxe/MptScsiDxe.inf
index a253c5d96916..8f366b92eb72 100644
--- a/OvmfPkg/MptScsiDxe/MptScsiDxe.inf
+++ b/OvmfPkg/MptScsiDxe/MptScsiDxe.inf
@@ -30,6 +30,7 @@ [Packages]
   OvmfPkg/OvmfPkg.dec
 
 [LibraryClasses]
+  BaseMemoryLib
   DebugLib
   MemoryAllocationLib
   UefiBootServicesTableLib
-- 
2.20.1