OvmfPkg: VirtioNetDxe: adapt virtio-net packet header size to virtio-1.0
In virtio-0.9.5, the size of the virtio-net packet header depends on whether the VIRTIO_NET_F_MRG_RXBUF feature is negotiated -- the "num_buffers" field is only appended to the header if the feature is negotiated. Since we never negotiate this feature, VirtioNetDxe never allocates room for the "num_buffers" field. With virtio-1.0, the "num_buffers" field is always there (although it doesn't carry useful information without VIRTIO_NET_F_MRG_RXBUF). Adapt the buffers that depend on the virtio-net header size (otherwise we have skewed / truncated packets). Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
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@@ -89,7 +89,7 @@ typedef struct {
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UINT16 TxMaxPending; // VirtioNetInitTx
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UINT16 TxCurPending; // VirtioNetInitTx
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UINT16 *TxFreeStack; // VirtioNetInitTx
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VIRTIO_NET_REQ TxSharedReq; // VirtioNetInitTx
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VIRTIO_1_0_NET_REQ TxSharedReq; // VirtioNetInitTx
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UINT16 TxLastUsed; // VirtioNetInitTx
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} VNET_DEV;
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