Re: [PATCH net-next v2] net: bcmgenet: convert RX path to page_pool

[Justin Chen]

On 6/10/26 4:48 AM, Nicolai Buchwitz wrote:
> Replace the per-packet __netdev_alloc_skb() + dma_map_single() in the
> RX path with page_pool. SKBs are built from pool pages via
> napi_build_skb() with skb_mark_for_recycle() so the network stack
> returns pages to the pool, and DMA mapping happens once per page
> instead of once per packet.
>
> Reject HW-reported lengths smaller than the RSB so a runt cannot
> underflow the SKB build path.
>
> Drop the now-unused priv->rx_buf_len field and the rx_dma_failed soft
> MIB counter (nothing increments it after the conversion). This
> removes the "rx_dma_failed" entry from ethtool -S, which is a
> user-visible change for monitoring tools that key on stat names.
>
> Signed-off-by: Nicolai Buchwitz <nb@xxxxxxxxxxx>

Reviewed-by: Justin Chen <justin.chen@xxxxxxxxxxxx>
Tested-by: Justin Chen <justin.chen@xxxxxxxxxxxx>