On Fri, Feb 23, 2024 at 12:01:37PM +0100, Julien Panis wrote:
> This patch adds XDP (eXpress Data Path) support to TI AM65 CPSW
> Ethernet driver. The following features are implemented:
> - NETDEV_XDP_ACT_BASIC (XDP_PASS, XDP_TX, XDP_DROP, XDP_ABORTED)
> - NETDEV_XDP_ACT_REDIRECT (XDP_REDIRECT)
> - NETDEV_XDP_ACT_NDO_XMIT (ndo_xdp_xmit callback)
>
> Signed-off-by: Julien Panis <jpanis@xxxxxxxxxxxx>
...
> @@ -440,6 +476,27 @@ static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma)
> dev_kfree_skb_any(skb);
> }
>
> +static struct sk_buff *am65_cpsw_alloc_skb(struct net_device *ndev, unsigned int len)
> +{
> + struct page *page;
> + struct sk_buff *skb;
nit: please arrange local variables in reverse xmas tree order,
from longest line to shortest in new code.
This tool can be useful: https://github.com/ecree-solarflare/xmastree
> +
> + page = dev_alloc_pages(0);
nit: Maybe dev_alloc_page() is appropriate here?
> + if (unlikely(!page))
> + return NULL;
> +
> + len += AM65_CPSW_HEADROOM;
> +
> + skb = build_skb(page_address(page), len);
> + if (unlikely(!skb))
Does page need to be freed here?
> + return NULL;
> +
> + skb_reserve(skb, AM65_CPSW_HEADROOM + NET_IP_ALIGN);
> + skb->dev = ndev;
> +
> + return skb;
> +}
...
