sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

OvmfPkg/VirtioNetDxe: alloc RxBuf using AllocateSharedPages()

Browse Source 
When device is behind the IOMMU, VirtioNetDxe is required to use the
device address in bus master operations. RxBuf is allocated using
AllocatePool() which returns the system physical address.

The patch uses VIRTIO_DEVICE_PROTOCOL.AllocateSharedPages() to allocate
the RxBuf and map with VirtioMapAllBytesInSharedBuffer() so that we can
obtain the device address for RxBuf.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Brijesh Singh
2017-09-14 16:22:42 -05:00
committed by Laszlo Ersek
parent 940baec09c
commit 46b11f00ac
5 changed files with 75 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
OvmfPkg/VirtioNetDxe/VirtioNet.h
View File

@@ -4,6 +4,7 @@
Protocol instances for virtio-net devices.
Copyright (C) 2013, 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
@@ -86,6 +87,9 @@ typedef struct {
// VirtioNetInitRing
UINT8 *RxBuf; // VirtioNetInitRx
UINT16 RxLastUsed; // VirtioNetInitRx
UINTN RxBufNrPages; // VirtioNetInitRx
EFI_PHYSICAL_ADDRESS RxBufDeviceBase; // VirtioNetInitRx
VOID *RxBufMap; // VirtioNetInitRx
VRING TxRing; // VirtioNetInitRing
VOID *TxRingMap; // VirtioRingMap and