Re: [PATCH v4 7/8] OvmfPkg/VirtioNetDxe: map caller-supplied Tx packet to device-address

[Laszlo Ersek <lersek@redhat.com>]

On 09/14/17 23:22, Brijesh Singh wrote:
> When device is behind the IOMMU, driver is require to pass the device
> address of caller-supplied transmit buffer for the bus master operations.
> 
> The patch uses VirtioNetMapTxBuf() to map caller-supplied Tx packet to a
> device-address and enqueue the device address in VRING for transfer and
> perform the reverse mapping when transfer is completed so that we can
> return the caller-supplied buffer.
> 
> 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/SnpGetStatus.c | 35 ++++++++++++++++----
>  OvmfPkg/VirtioNetDxe/SnpTransmit.c  | 27 +++++++++++----
>  2 files changed, 49 insertions(+), 13 deletions(-)

Reviewed-by: Laszlo Ersek <lersek@redhat.com>

I'll do some tests.

Thanks
Laszlo