[PATCH 4/6] Platform/ARM/Sgi: add support for virtio block device

[Thomas Abraham <thomas.abraham@arm.com>]

From: Daniil Egranov <daniil.egranov@arm.com>

Add the registration of the virtio block device.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Daniil Egranov <daniil.egranov@arm.com>
Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
---
 .../ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c   | 18 ++++-
 .../ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf |  1 +
 .../ARM/SgiPkg/Drivers/PlatformDxe/VirtioBlockIo.c | 76 ++++++++++++++++++++++
 3 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 Platform/ARM/SgiPkg/Drivers/PlatformDxe/VirtioBlockIo.c

diff --git a/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c
index 2da768a..5d54f06 100644
--- a/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c
+++ b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c
@@ -15,11 +15,27 @@
 #include <Library/DebugLib.h>
 
 EFI_STATUS
+InitVirtioBlockIo (
+   IN EFI_HANDLE         ImageHandle
+  );
+
+EFI_STATUS
 EFIAPI
 ArmSgiPkgEntryPoint (
   IN EFI_HANDLE         ImageHandle,
   IN EFI_SYSTEM_TABLE   *SystemTable
   )
 {
-  return EFI_SUCCESS;
+  EFI_STATUS              Status;
+
+  // Install Virtio Block IO.
+  if ( FeaturePcdGet (PcdVirtioSupported) == TRUE ) {
+    Status = InitVirtioBlockIo (ImageHandle);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_ERROR, "PlatformDxe: Failed to install Virtio Block IO\n"));
+      return Status;
+    }
+  }
+
+  return Status;
 }
diff --git a/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf
index 379d7f4..534947f 100644
--- a/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf
+++ b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf
@@ -20,6 +20,7 @@
 
 [Sources.common]
   PlatformDxe.c
+  VirtioBlockIo.c
 
 [Packages]
   ArmPkg/ArmPkg.dec
diff --git a/Platform/ARM/SgiPkg/Drivers/PlatformDxe/VirtioBlockIo.c b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/VirtioBlockIo.c
new file mode 100644
index 0000000..eb00225
--- /dev/null
+++ b/Platform/ARM/SgiPkg/Drivers/PlatformDxe/VirtioBlockIo.c
@@ -0,0 +1,76 @@
+/** @file
+
+  Copyright (c) 2018, ARM Ltd. All rights reserved.<BR>
+
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/VirtioMmioDeviceLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <SgiPlatform.h>
+
+#pragma pack (1)
+typedef struct {
+  VENDOR_DEVICE_PATH                  Vendor;
+  EFI_DEVICE_PATH_PROTOCOL            End;
+} VIRTIO_BLK_DEVICE_PATH;
+#pragma pack ()
+
+STATIC VIRTIO_BLK_DEVICE_PATH mVirtioBlockDevicePath =
+{
+  {
+    {
+      HARDWARE_DEVICE_PATH,
+      HW_VENDOR_DP,
+      {
+        (UINT8)( sizeof (VENDOR_DEVICE_PATH) ),
+        (UINT8)( (sizeof (VENDOR_DEVICE_PATH) ) >> 8)
+      }
+    },
+    EFI_CALLER_ID_GUID,
+  },
+  {
+    END_DEVICE_PATH_TYPE,
+    END_ENTIRE_DEVICE_PATH_SUBTYPE,
+    {
+      sizeof (EFI_DEVICE_PATH_PROTOCOL),
+      0
+    }
+  }
+};
+
+/**
+ * Entrypoint for 'VirtioBlockIo' driver
+ */
+EFI_STATUS
+InitVirtioBlockIo (
+   IN EFI_HANDLE         ImageHandle
+  )
+{
+  EFI_STATUS Status = 0;
+
+  Status = gBS->InstallProtocolInterface (&ImageHandle,
+               &gEfiDevicePathProtocolGuid, EFI_NATIVE_INTERFACE,
+               &mVirtioBlockDevicePath);
+
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  // Declare the Virtio BlockIo device
+  Status = VirtioMmioInstallDevice (SGI_EXP_SYSPH_VIRTIO_BLOCK_BASE, ImageHandle);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "PlatformDxe: Failed to install Virtio block device\n"));
+  }
+
+  return Status;
+}
-- 
2.7.4