Re: [PATCH net-next v6 6/7] net: macb: add XDP support for gem
From: Mohsin Bashir <hidden>
Date: 2026-03-24 04:57:17
quoted hunk ↗ jump to hunk
- addr += first_frame ? bp->rx_ip_align : 0; - - dma_sync_single_for_cpu(&bp->pdev->dev, addr, data_len, + dma_sync_single_for_cpu(&bp->pdev->dev, + addr + (first_frame ? bp->rx_ip_align : 0), + data_len, page_pool_get_dma_dir(queue->page_pool)); if (first_frame) {@@ -1683,6 +1878,18 @@ static int gem_rx(struct macb_queue *queue, struct napi_struct *napi, queue->stats.rx_dropped++; } + headroom = bp->rx_headroom; + + if (last_frame) { + ret = gem_xdp_run(queue, buff_head, &data_len, + &headroom, addr - gem_rx_pad(bp));
Just to clarify, Is xdp support only available for single-buff case? Is it possible to receive multi-buff frames? If yes, should these be allowed to bypass XDP or should these be dropped? The later case would probably require explicit handling?