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>
---
OvmfPkg/VirtioNetDxe/VirtioNet.h | 7 ++-
OvmfPkg/VirtioNetDxe/SnpInitialize.c | 50 +++++++++++++++-----
OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c | 10 ++--
OvmfPkg/VirtioNetDxe/SnpShutdown.c | 4 +-
OvmfPkg/VirtioNetDxe/TechNotes.txt | 1 +
5 files changed, 55 insertions(+), 17 deletions(-)
diff --git a/OvmfPkg/VirtioNetDxe/VirtioNet.h b/OvmfPkg/VirtioNetDxe/VirtioNet.h
index 87a0f06e01a4..6762fc9d1d6e 100644
--- a/OvmfPkg/VirtioNetDxe/VirtioNet.h
+++ b/OvmfPkg/VirtioNetDxe/VirtioNet.h
@@ -82,10 +82,14 @@ typedef struct {
EFI_HANDLE MacHandle; // VirtioNetDriverBindingStart
VRING RxRing; // VirtioNetInitRing
+ VOID *RxRingMap; // VirtioRingMap and
+ // VirtioNetInitRing
UINT8 *RxBuf; // VirtioNetInitRx
UINT16 RxLastUsed; // VirtioNetInitRx
VRING TxRing; // VirtioNetInitRing
+ VOID *TxRingMap; // VirtioRingMap and
+ // VirtioNetInitRing
UINT16 TxMaxPending; // VirtioNetInitTx
UINT16 TxCurPending; // VirtioNetInitTx
UINT16 *TxFreeStack; // VirtioNetInitTx
@@ -267,7 +271,8 @@ VOID
EFIAPI
VirtioNetUninitRing (
IN OUT VNET_DEV *Dev,
- IN OUT VRING *Ring
+ IN OUT VRING *Ring,
+ IN VOID *RingMap
);
//
diff --git a/OvmfPkg/VirtioNetDxe/SnpInitialize.c b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
index 637c978709fd..8eabdbff6f5e 100644
--- a/OvmfPkg/VirtioNetDxe/SnpInitialize.c
+++ b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
@@ -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 (
}
//
+ // If anything fails from here on, we must release the ring resources.
+ //
+ 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 release the ring resources.
+ // 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 ReleaseQueue;
+ 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:
//
diff --git a/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c b/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
index 5b75eabc7a6b..57c7395848bd 100644
--- a/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
+++ b/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
@@ -55,15 +55,19 @@ VirtioNetShutdownTx (
/**
Release TX and RX VRING resources.
- @param[in,out] Dev The VNET_DEV driver instance which was using the ring.
- @param[in,out] Ring The virtio ring to clean up.
+ @param[in,out] Dev The VNET_DEV driver instance which was using
+ the ring.
+ @param[in,out] Ring The virtio ring to clean up.
+ @param[in] RingMap A token return from the VirtioRingMap()
*/
VOID
EFIAPI
VirtioNetUninitRing (
IN OUT VNET_DEV *Dev,
- IN OUT VRING *Ring
+ IN OUT VRING *Ring,
+ IN VOID *RingMap
)
{
+ Dev->VirtIo->UnmapSharedBuffer (Dev->VirtIo, RingMap);
VirtioRingUninit (Dev->VirtIo, Ring);
}
diff --git a/OvmfPkg/VirtioNetDxe/SnpShutdown.c b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
index 432e0691d457..d8c11f20de61 100644
--- a/OvmfPkg/VirtioNetDxe/SnpShutdown.c
+++ b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
@@ -67,8 +67,8 @@ VirtioNetShutdown (
Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
VirtioNetShutdownRx (Dev);
VirtioNetShutdownTx (Dev);
- VirtioNetUninitRing (Dev, &Dev->TxRing);
- VirtioNetUninitRing (Dev, &Dev->RxRing);
+ VirtioNetUninitRing (Dev, &Dev->TxRing, Dev->TxRingMap);
+ VirtioNetUninitRing (Dev, &Dev->RxRing, Dev->RxRingMap);
Dev->Snm.State = EfiSimpleNetworkStarted;
Status = EFI_SUCCESS;
diff --git a/OvmfPkg/VirtioNetDxe/TechNotes.txt b/OvmfPkg/VirtioNetDxe/TechNotes.txt
index 86b91f561495..0891e8210489 100644
--- a/OvmfPkg/VirtioNetDxe/TechNotes.txt
+++ b/OvmfPkg/VirtioNetDxe/TechNotes.txt
@@ -72,6 +72,7 @@ faithfully indented) that implement the transition.
VirtioRingInit | | VirtioNetShutdownTx [SnpSharedHelpers.c]
VirtioNetInitTx | | VirtioNetUninitRing [SnpSharedHelpers.c]
VirtioNetInitRx | | {Tx, Rx}
+ | | VirtIo->UnmapSharedBuffer
| | VirtioRingUninit
v |
+-----------------------------+
--
2.9.4
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On 09/11/17 14:16, Brijesh Singh wrote:
> 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>
> ---
> OvmfPkg/VirtioNetDxe/VirtioNet.h | 7 ++-
> OvmfPkg/VirtioNetDxe/SnpInitialize.c | 50 +++++++++++++++-----
> OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c | 10 ++--
> OvmfPkg/VirtioNetDxe/SnpShutdown.c | 4 +-
> OvmfPkg/VirtioNetDxe/TechNotes.txt | 1 +
> 5 files changed, 55 insertions(+), 17 deletions(-)
>
> diff --git a/OvmfPkg/VirtioNetDxe/VirtioNet.h b/OvmfPkg/VirtioNetDxe/VirtioNet.h
> index 87a0f06e01a4..6762fc9d1d6e 100644
> --- a/OvmfPkg/VirtioNetDxe/VirtioNet.h
> +++ b/OvmfPkg/VirtioNetDxe/VirtioNet.h
> @@ -82,10 +82,14 @@ typedef struct {
> EFI_HANDLE MacHandle; // VirtioNetDriverBindingStart
>
> VRING RxRing; // VirtioNetInitRing
> + VOID *RxRingMap; // VirtioRingMap and
> + // VirtioNetInitRing
> UINT8 *RxBuf; // VirtioNetInitRx
> UINT16 RxLastUsed; // VirtioNetInitRx
>
> VRING TxRing; // VirtioNetInitRing
> + VOID *TxRingMap; // VirtioRingMap and
> + // VirtioNetInitRing
> UINT16 TxMaxPending; // VirtioNetInitTx
> UINT16 TxCurPending; // VirtioNetInitTx
> UINT16 *TxFreeStack; // VirtioNetInitTx
> @@ -267,7 +271,8 @@ VOID
> EFIAPI
> VirtioNetUninitRing (
> IN OUT VNET_DEV *Dev,
> - IN OUT VRING *Ring
> + IN OUT VRING *Ring,
> + IN VOID *RingMap
> );
>
> //
> diff --git a/OvmfPkg/VirtioNetDxe/SnpInitialize.c b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> index 637c978709fd..8eabdbff6f5e 100644
> --- a/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> +++ b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> @@ -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 (
> }
>
> //
> + // If anything fails from here on, we must release the ring resources.
> + //
> + 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 release the ring resources.
> + // 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 ReleaseQueue;
> + 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:
> //
> diff --git a/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c b/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
> index 5b75eabc7a6b..57c7395848bd 100644
> --- a/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
> +++ b/OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c
> @@ -55,15 +55,19 @@ VirtioNetShutdownTx (
> /**
> Release TX and RX VRING resources.
>
> - @param[in,out] Dev The VNET_DEV driver instance which was using the ring.
> - @param[in,out] Ring The virtio ring to clean up.
> + @param[in,out] Dev The VNET_DEV driver instance which was using
> + the ring.
> + @param[in,out] Ring The virtio ring to clean up.
> + @param[in] RingMap A token return from the VirtioRingMap()
> */
> VOID
> EFIAPI
> VirtioNetUninitRing (
> IN OUT VNET_DEV *Dev,
> - IN OUT VRING *Ring
> + IN OUT VRING *Ring,
> + IN VOID *RingMap
> )
> {
> + Dev->VirtIo->UnmapSharedBuffer (Dev->VirtIo, RingMap);
> VirtioRingUninit (Dev->VirtIo, Ring);
> }
> diff --git a/OvmfPkg/VirtioNetDxe/SnpShutdown.c b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
> index 432e0691d457..d8c11f20de61 100644
> --- a/OvmfPkg/VirtioNetDxe/SnpShutdown.c
> +++ b/OvmfPkg/VirtioNetDxe/SnpShutdown.c
> @@ -67,8 +67,8 @@ VirtioNetShutdown (
> Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
> VirtioNetShutdownRx (Dev);
> VirtioNetShutdownTx (Dev);
> - VirtioNetUninitRing (Dev, &Dev->TxRing);
> - VirtioNetUninitRing (Dev, &Dev->RxRing);
> + VirtioNetUninitRing (Dev, &Dev->TxRing, Dev->TxRingMap);
> + VirtioNetUninitRing (Dev, &Dev->RxRing, Dev->RxRingMap);
>
> Dev->Snm.State = EfiSimpleNetworkStarted;
> Status = EFI_SUCCESS;
> diff --git a/OvmfPkg/VirtioNetDxe/TechNotes.txt b/OvmfPkg/VirtioNetDxe/TechNotes.txt
> index 86b91f561495..0891e8210489 100644
> --- a/OvmfPkg/VirtioNetDxe/TechNotes.txt
> +++ b/OvmfPkg/VirtioNetDxe/TechNotes.txt
> @@ -72,6 +72,7 @@ faithfully indented) that implement the transition.
> VirtioRingInit | | VirtioNetShutdownTx [SnpSharedHelpers.c]
> VirtioNetInitTx | | VirtioNetUninitRing [SnpSharedHelpers.c]
> VirtioNetInitRx | | {Tx, Rx}
> + | | VirtIo->UnmapSharedBuffer
> | | VirtioRingUninit
> v |
> +-----------------------------+
>
(1) The documentation udpate is not correct; please check my previous
review:
http://mid.mail-archive.com/04fefb16-23d5-f6df-0657-9d4c5e96ac57@redhat.com
In particular you forgot to add the VirtioRingMap function call on the
left side, under VirtioNetInitRing:
On 09/05/17 13:47, Laszlo Ersek wrote:
> (9d) modify the documentation again, to the following state:
>
>> +-------------------------+
>> | EfiSimpleNetworkStarted |
>> +-------------------------+
>> | ^
>> [SnpInitialize.c] | | [SnpShutdown.c]
>> VirtioNetInitialize | | VirtioNetShutdown
>> VirtioNetInitRing {Rx, Tx} | | VirtioNetShutdownRx [SnpSharedHelpers.c]
>> VirtioRingInit | | VirtioNetShutdownTx [SnpSharedHelpers.c]
>> VirtioRingMap | | VirtioNetUninitRing [SnpSharedHelpers.c]
>> VirtioNetInitTx | | {Tx, Rx}
>> VirtioNetInitRx | | VirtIo->UnmapSharedBuffer
>> | | VirtioRingUninit
>> v |
>> +-----------------------------+
>> | EfiSimpleNetworkInitialized |
>> +-----------------------------+
I think simply pasting the above into "TechNotes.txt" would be easiest.
The rest looks good!
Thanks
Laszlo
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