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7bc054c2d4
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@tipi-net.de> Reviewed-by: Justin Chen <justin.chen@broadcom.com> Tested-by: Justin Chen <justin.chen@broadcom.com> Link: https://patch.msgid.link/20260610114835.2225423-1-nb@tipi-net.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>