Passing the VirtIo protocol instance will allow the vring to use
VIRTIO_DEVICE_PROTOCOL.AllocateSharedPages () to allocate vring buffer.

Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
---
 OvmfPkg/Include/Library/VirtioLib.h   | 14 ++++++++++----
 OvmfPkg/Library/VirtioLib/VirtioLib.c | 14 ++++++++++----
 OvmfPkg/VirtioBlkDxe/VirtioBlk.c      |  7 ++++---
 OvmfPkg/VirtioGpuDxe/Commands.c       |  7 ++++---
 OvmfPkg/VirtioNetDxe/SnpInitialize.c  |  9 +++++----
 OvmfPkg/VirtioNetDxe/SnpShutdown.c    |  5 +++--
 OvmfPkg/VirtioRngDxe/VirtioRng.c      |  7 ++++---
 OvmfPkg/VirtioScsiDxe/VirtioScsi.c    |  7 ++++---
 8 files changed, 44 insertions(+), 26 deletions(-)

diff --git a/OvmfPkg/Include/Library/VirtioLib.h 
b/OvmfPkg/Include/Library/VirtioLib.h
index fa82734f1852..610654225de7 100644
--- a/OvmfPkg/Include/Library/VirtioLib.h
+++ b/OvmfPkg/Include/Library/VirtioLib.h
@@ -35,6 +35,8 @@
   - 1.1 Virtqueues,
   - 2.3 Virtqueue Configuration.
 
+  @param[in]  VirtIo            The virtio device which will use the ring.
+
   @param[in]                    The number of descriptors to allocate for the
                                 virtio ring, as requested by the host.
 
@@ -52,8 +54,9 @@
 EFI_STATUS
 EFIAPI
 VirtioRingInit (
-  IN  UINT16 QueueSize,
-  OUT VRING  *Ring
+  IN  VIRTIO_DEVICE_PROTOCOL *VirtIo,
+  IN  UINT16                 QueueSize,
+  OUT VRING                  *Ring
   );
 
 
@@ -65,13 +68,16 @@ VirtioRingInit (
   invoking this function: the VSTAT_DRIVER_OK bit must be clear in
   VhdrDeviceStatus.
 
-  @param[out] Ring  The virtio ring to clean up.
+  @param[in]  VirtIo  The virtio device which will was using the ring.
+
+  @param[out] Ring    The virtio ring to clean up.
 
 **/
 VOID
 EFIAPI
 VirtioRingUninit (
-  IN OUT VRING *Ring
+  IN     VIRTIO_DEVICE_PROTOCOL *VirtIo,
+  IN OUT VRING                  *Ring
   );
 
 
diff --git a/OvmfPkg/Library/VirtioLib/VirtioLib.c 
b/OvmfPkg/Library/VirtioLib/VirtioLib.c
index f6b464b6cdf8..50e5ec28ea1b 100644
--- a/OvmfPkg/Library/VirtioLib/VirtioLib.c
+++ b/OvmfPkg/Library/VirtioLib/VirtioLib.c
@@ -37,6 +37,8 @@
   - 1.1 Virtqueues,
   - 2.3 Virtqueue Configuration.
 
+  @param[in]  VirtIo            The virtio device which will use the ring.
+
   @param[in]                    The number of descriptors to allocate for the
                                 virtio ring, as requested by the host.
 
@@ -54,8 +56,9 @@
 EFI_STATUS
 EFIAPI
 VirtioRingInit (
-  IN  UINT16 QueueSize,
-  OUT VRING  *Ring
+  IN  VIRTIO_DEVICE_PROTOCOL *VirtIo,
+  IN  UINT16                 QueueSize,
+  OUT VRING                  *Ring
   )
 {
   UINTN          RingSize;
@@ -128,13 +131,16 @@ VirtioRingInit (
   invoking this function: the VSTAT_DRIVER_OK bit must be clear in
   VhdrDeviceStatus.
 
-  @param[out] Ring  The virtio ring to clean up.
+  @param[in]  VirtIo  The virtio device which will was using the ring.
+
+  @param[out] Ring    The virtio ring to clean up.
 
 **/
 VOID
 EFIAPI
 VirtioRingUninit (
-  IN OUT VRING *Ring
+  IN     VIRTIO_DEVICE_PROTOCOL *VirtIo,
+  IN OUT VRING                  *Ring
   )
 {
   FreePages (Ring->Base, Ring->NumPages);
diff --git a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
index 3ce72281c204..61b9cab4ff02 100644
--- a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
+++ b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
@@ -12,6 +12,7 @@
 
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, 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
@@ -722,7 +723,7 @@ VirtioBlkInit (
     goto Failed;
   }
 
-  Status = VirtioRingInit (QueueSize, &Dev->Ring);
+  Status = VirtioRingInit (Dev->VirtIo, QueueSize, &Dev->Ring);
   if (EFI_ERROR (Status)) {
     goto Failed;
   }
@@ -811,7 +812,7 @@ VirtioBlkInit (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
 Failed:
   //
@@ -848,7 +849,7 @@ VirtioBlkUninit (
   //
   Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
 
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
   SetMem (&Dev->BlockIo,      sizeof Dev->BlockIo,      0x00);
   SetMem (&Dev->BlockIoMedia, sizeof Dev->BlockIoMedia, 0x00);
diff --git a/OvmfPkg/VirtioGpuDxe/Commands.c b/OvmfPkg/VirtioGpuDxe/Commands.c
index 962087cfec97..c2e4d72feb67 100644
--- a/OvmfPkg/VirtioGpuDxe/Commands.c
+++ b/OvmfPkg/VirtioGpuDxe/Commands.c
@@ -3,6 +3,7 @@
   VirtIo GPU initialization, and commands (primitives) for the GPU device.
 
   Copyright (C) 2016, Red Hat, Inc.
+  Copyright (c) 2017, AMD Inc, 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
@@ -127,7 +128,7 @@ VirtioGpuInit (
   //
   // [...] population of virtqueues [...]
   //
-  Status = VirtioRingInit (QueueSize, &VgpuDev->Ring);
+  Status = VirtioRingInit (VgpuDev->VirtIo, QueueSize, &VgpuDev->Ring);
   if (EFI_ERROR (Status)) {
     goto Failed;
   }
@@ -148,7 +149,7 @@ VirtioGpuInit (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (&VgpuDev->Ring);
+  VirtioRingUninit (VgpuDev->VirtIo, &VgpuDev->Ring);
 
 Failed:
   //
@@ -183,7 +184,7 @@ VirtioGpuUninit (
   // configuration.
   //
   VgpuDev->VirtIo->SetDeviceStatus (VgpuDev->VirtIo, 0);
-  VirtioRingUninit (&VgpuDev->Ring);
+  VirtioRingUninit (VgpuDev->VirtIo, &VgpuDev->Ring);
 }
 
 /**
diff --git a/OvmfPkg/VirtioNetDxe/SnpInitialize.c 
b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
index 430670a980f2..6d9b81a9f939 100644
--- a/OvmfPkg/VirtioNetDxe/SnpInitialize.c
+++ b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
@@ -5,6 +5,7 @@
 
   Copyright (C) 2013, Red Hat, Inc.
   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, 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
@@ -73,7 +74,7 @@ VirtioNetInitRing (
   if (QueueSize < 2) {
     return EFI_UNSUPPORTED;
   }
-  Status = VirtioRingInit (QueueSize, Ring);
+  Status = VirtioRingInit (Dev->VirtIo, QueueSize, Ring);
   if (EFI_ERROR (Status)) {
     return Status;
   }
@@ -103,7 +104,7 @@ VirtioNetInitRing (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (Ring);
+  VirtioRingUninit (Dev->VirtIo, Ring);
 
   return Status;
 }
@@ -509,10 +510,10 @@ AbortDevice:
   Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
 
 ReleaseTxRing:
-  VirtioRingUninit (&Dev->TxRing);
+  VirtioRingUninit (Dev->VirtIo, &Dev->TxRing);
 
 ReleaseRxRing:
-  VirtioRingUninit (&Dev->RxRing);
+  VirtioRingUninit (Dev->VirtIo, &Dev->RxRing);
 
 DeviceFailed:
   //
diff --git a/OvmfPkg/VirtioNetDxe/SnpShutdown.c 
b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
index 01409c0ce714..5e84191fbbdd 100644
--- a/OvmfPkg/VirtioNetDxe/SnpShutdown.c
+++ b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
@@ -4,6 +4,7 @@
 
   Copyright (C) 2013, Red Hat, Inc.
   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, 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
@@ -66,8 +67,8 @@ VirtioNetShutdown (
   Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
   VirtioNetShutdownRx (Dev);
   VirtioNetShutdownTx (Dev);
-  VirtioRingUninit (&Dev->TxRing);
-  VirtioRingUninit (&Dev->RxRing);
+  VirtioRingUninit (Dev->VirtIo, &Dev->TxRing);
+  VirtioRingUninit (Dev->VirtIo, &Dev->RxRing);
 
   Dev->Snm.State = EfiSimpleNetworkStarted;
   Status = EFI_SUCCESS;
diff --git a/OvmfPkg/VirtioRngDxe/VirtioRng.c b/OvmfPkg/VirtioRngDxe/VirtioRng.c
index 1a186d04082a..e20602ac7225 100644
--- a/OvmfPkg/VirtioRngDxe/VirtioRng.c
+++ b/OvmfPkg/VirtioRngDxe/VirtioRng.c
@@ -6,6 +6,7 @@
 
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, All rights reserved.<BR>
 
   This driver:
 
@@ -275,7 +276,7 @@ VirtioRngInit (
     goto Failed;
   }
 
-  Status = VirtioRingInit (QueueSize, &Dev->Ring);
+  Status = VirtioRingInit (Dev->VirtIo, QueueSize, &Dev->Ring);
   if (EFI_ERROR (Status)) {
     goto Failed;
   }
@@ -331,7 +332,7 @@ VirtioRngInit (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
 Failed:
   //
@@ -358,7 +359,7 @@ VirtioRngUninit (
   // the old comms area.
   //
   Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 }
 
 //
diff --git a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c 
b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
index c080404330e5..c2f6f412ff40 100644
--- a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
+++ b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
@@ -27,6 +27,7 @@
 
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, 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
@@ -832,7 +833,7 @@ VirtioScsiInit (
     goto Failed;
   }
 
-  Status = VirtioRingInit (QueueSize, &Dev->Ring);
+  Status = VirtioRingInit (Dev->VirtIo, QueueSize, &Dev->Ring);
   if (EFI_ERROR (Status)) {
     goto Failed;
   }
@@ -926,7 +927,7 @@ VirtioScsiInit (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
 Failed:
   //
@@ -964,7 +965,7 @@ VirtioScsiUninit (
   Dev->MaxLun         = 0;
   Dev->MaxSectors     = 0;
 
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
   SetMem (&Dev->PassThru,     sizeof Dev->PassThru,     0x00);
   SetMem (&Dev->PassThruMode, sizeof Dev->PassThruMode, 0x00);
-- 
2.7.4

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