Re: [RFC net-next v3 1/7] queue_api: add support for fetching per queue DMA dev

[Pavel Begunkov]

On 8/15/25 12:03, Dragos Tatulea wrote:
> For zerocopy (io_uring, devmem), there is an assumption that the
> parent device can do DMA. However that is not always the case:
> - Scalable Function netdevs [1] have the DMA device in the grandparent.
> - For Multi-PF netdevs [2] queues can be associated to different DMA
> devices.
>
> This patch introduces the a queue based interface for allowing drivers
> to expose a different DMA device for zerocopy.
>
> [1] Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
> [2] Documentation/networking/multi-pf-netdev.rst
>
> Signed-off-by: Dragos Tatulea <dtatulea@xxxxxxxxxx>
> ---
>   include/net/netdev_queues.h | 20 ++++++++++++++++++++
>   1 file changed, 20 insertions(+)

Assuming it'll be moved and uninlined

Reviewed-by: Pavel Begunkov <asml.silence@xxxxxxxxx>

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Pavel Begunkov