Re: [PATCH v3 6/8] OvmfPkg/VirtioNetDxe: add Tx packet map/unmap helper functions

[Laszlo Ersek <lersek@redhat.com>]

On 09/14/17 13:08, Brijesh Singh wrote:
> When device is behind IOMMU, driver is require to pass the device address
> of TxBuf in the Tx VRING. The patch adds helper functions and data
> structure to map and unmap the TxBuf system physical address to a device
> address.
> 
> Since the TxBuf is returned back to caller from VirtioNetGetStatus() hence
> we use OrderedCollection interface to save the TxBuf system physical to
> device address mapping. After the TxBuf is succesfully transmitted
> VirtioNetUnmapTxBuf() does the reverse lookup in OrderedCollection data
> structure to get the system physical address of TxBuf for a given device
> address.
> 
> 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.inf      |   1 +
>  OvmfPkg/VirtioNetDxe/VirtioNet.h        |  38 ++++
>  OvmfPkg/VirtioNetDxe/SnpInitialize.c    |  18 +-
>  OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c | 224 ++++++++++++++++++++
>  4 files changed, 279 insertions(+), 2 deletions(-)

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