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OvmfPkg/VirtioNetDxe: map VRINGs using VirtioRingMap()

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When device is behind the IOMMU then driver need to pass the device
address when programing the bus master. The patch uses VirtioRingMap() to
map the VRING system physical address[es] to device address[es].

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 16:22:41 -05:00
committed by Laszlo Ersek
parent 55dd5a673b
commit 940baec09c
5 changed files with 58 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
OvmfPkg/VirtioNetDxe/SnpInitialize.c
View File

@@ -35,11 +35,13 @@
the network device.
@param[out] Ring The virtio-ring inside the VNET_DEV structure,
corresponding to Selector.
@param[out] Mapping A resulting token to pass to VirtioNetUninitRing()
@retval EFI_UNSUPPORTED The queue size reported by the virtio-net device is
too small.
@return Status codes from VIRTIO_CFG_WRITE(),
VIRTIO_CFG_READ() and VirtioRingInit().
VIRTIO_CFG_READ(), VirtioRingInit() and
VirtioRingMap().
@retval EFI_SUCCESS Ring initialized.
*/
@@ -49,11 +51,14 @@ EFIAPI
VirtioNetInitRing (
IN OUT VNET_DEV *Dev,
IN UINT16 Selector,
OUT VRING *Ring
OUT VRING *Ring,
OUT VOID **Mapping
)
{
EFI_STATUS Status;
UINT16 QueueSize;
UINT64 RingBaseShift;
VOID *MapInfo;
//
// step 4b -- allocate selected queue
@@ -80,29 +85,42 @@ VirtioNetInitRing (
}
//
// Additional steps for MMIO: align the queue appropriately, and set the
// size. If anything fails from here on, we must release the ring resources.
// If anything fails from here on, we must release the ring resources.
//
Status = Dev->VirtIo->SetQueueNum (Dev->VirtIo, QueueSize);
Status = VirtioRingMap (Dev->VirtIo, Ring, &RingBaseShift, &MapInfo);
if (EFI_ERROR (Status)) {
goto ReleaseQueue;
}
//
// Additional steps for MMIO: align the queue appropriately, and set the
// size. If anything fails from here on, we must unmap the ring resources.
//
Status = Dev->VirtIo->SetQueueNum (Dev->VirtIo, QueueSize);
if (EFI_ERROR (Status)) {
goto UnmapQueue;
}
Status = Dev->VirtIo->SetQueueAlign (Dev->VirtIo, EFI_PAGE_SIZE);
if (EFI_ERROR (Status)) {
goto ReleaseQueue;
goto UnmapQueue;
}
//
// step 4c -- report GPFN (guest-physical frame number) of queue
//
Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, Ring, 0);
Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, Ring, RingBaseShift);
if (EFI_ERROR (Status)) {
goto ReleaseQueue;
goto UnmapQueue;
}
*Mapping = MapInfo;
return EFI_SUCCESS;
UnmapQueue:
Dev->VirtIo->UnmapSharedBuffer (Dev->VirtIo, MapInfo);
ReleaseQueue:
VirtioRingUninit (Dev->VirtIo, Ring);
@@ -456,12 +474,22 @@ VirtioNetInitialize (
//
// step 4b, 4c -- allocate and report virtqueues
//
Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_RX, &Dev->RxRing);
Status = VirtioNetInitRing (
Dev,
VIRTIO_NET_Q_RX,
&Dev->RxRing,
&Dev->RxRingMap
);
if (EFI_ERROR (Status)) {
goto DeviceFailed;
}
Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_TX, &Dev->TxRing);
Status = VirtioNetInitRing (
Dev,
VIRTIO_NET_Q_TX,
&Dev->TxRing,
&Dev->TxRingMap
);
if (EFI_ERROR (Status)) {
goto ReleaseRxRing;
}
@@ -510,10 +538,10 @@ AbortDevice:
Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
ReleaseTxRing:
VirtioNetUninitRing (Dev, &Dev->TxRing);
VirtioNetUninitRing (Dev, &Dev->TxRing, Dev->TxRingMap);
ReleaseRxRing:
VirtioNetUninitRing (Dev, &Dev->RxRing);
VirtioNetUninitRing (Dev, &Dev->RxRing, Dev->RxRingMap);
DeviceFailed:
//