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author | Brijesh Singh <brijesh.singh@amd.com> | 2017-08-23 06:57:17 -0400 |
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committer | Laszlo Ersek <lersek@redhat.com> | 2017-08-25 10:42:19 +0200 |
commit | 53a4c6047f3ce2ece7bb8db5b9815a1c9227dddb (patch) | |
tree | 4467675f6a56388cefdce09e93df5deef656812e /OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h | |
parent | fc2c1543e51ee6fc8a2956594456eb4db5f0a3ca (diff) | |
download | edk2-53a4c6047f3ce2ece7bb8db5b9815a1c9227dddb.tar.gz edk2-53a4c6047f3ce2ece7bb8db5b9815a1c9227dddb.tar.bz2 edk2-53a4c6047f3ce2ece7bb8db5b9815a1c9227dddb.zip |
OvmfPkg/Virtio: take RingBaseShift in SetQueueAddress()
For the case when an IOMMU is used for translating system physical
addresses to DMA bus master addresses, the transport-independent
virtio device drivers will be required to map their VRING areas to
bus addresses with VIRTIO_DEVICE_PROTOCOL.MapSharedBuffer() calls.
- MMIO and legacy virtio transport do not support IOMMU to translate the
addresses hence RingBaseShift will always be set to zero.
- modern virtio transport supports IOMMU to translate the address, in
next patch we will update the Virtio10Dxe to use RingBaseShift offset.
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>
[lersek@redhat.com: remove commit msg paragraph with VirtioLib reference]
[lersek@redhat.com: fix typo in VIRTIO_SET_QUEUE_ADDRESS comment block]
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h')
-rw-r--r-- | OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h index e5881d537f..e6279159f8 100644 --- a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h +++ b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h @@ -115,7 +115,8 @@ VirtioMmioSetQueueSel ( EFI_STATUS
VirtioMmioSetQueueAddress (
IN VIRTIO_DEVICE_PROTOCOL *This,
- IN VRING *Ring
+ IN VRING *Ring,
+ IN UINT64 RingBaseShift
);
EFI_STATUS
|