tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-04-08 17:05:09 +02:00
Code Issues Packages Projects Releases Wiki Activity

OvmfPkg/Virtio10Dxe: add the RingBaseShift offset

Browse Source 
virtio drivers use VIRTIO_DEVICE_PROTOCOL.MapSharedBuffer() to map the
ring buffer host address to a device address. If an IOMMU is present then
RingBaseShift contains the offset from the host address.

Suggested-by: Laszlo Ersek <lersek@redhat.com>
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>
This commit is contained in:
Brijesh Singh 2017-08-23 06:57:17 -04:00 committed by Laszlo Ersek
parent 53a4c6047f
commit 60ee56295f
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
OvmfPkg/Virtio10Dxe/Virtio10.c
View File

@ -498,11 +498,10 @@ Virtio10SetQueueAddress (
UINT64 Address;
UINT16 Enable;
ASSERT (RingBaseShift == 0);
Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);
Address = (UINTN)Ring->Desc;
Address += RingBaseShift;
Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,
OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueDesc),
sizeof Address, &Address);
@ -511,6 +510,7 @@ Virtio10SetQueueAddress (
}
Address = (UINTN)Ring->Avail.Flags;
Address += RingBaseShift;
Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,
OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueAvail),
sizeof Address, &Address);
@ -519,6 +519,7 @@ Virtio10SetQueueAddress (
}
Address = (UINTN)Ring->Used.Flags;
Address += RingBaseShift;
Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,
OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueUsed),
sizeof Address, &Address);