Commit 07b2fbff authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Jakub Kicinski
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net: mvneta: Add metadata support for xdp mode 



Set metadata size building the skb from xdp_buff in mvneta driver
mvneta sets xdp headroom to:

MVNETA_MH_SIZE + MVNETA_SKB_HEADROOM

where

MVNETA_MH_SIZE 2
MVNETA_SKB_HEADROOM max(NET_SKB_PAD, XDP_PACKET_HEADROOM)

so the headroom is large enough to contain xdp_frame and xdp metadata.

Reviewed-by: default avatarMichal Kubiak <michal.kubiak@intel.com>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250318-mvneta-xdp-meta-v2-1-b6075778f61f@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 6165feda

drivers/net/ethernet/marvell/mvneta.c

+4 −1
Original line number Diff line number Diff line
@@ -2342,7 +2342,7 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp, 
	prefetch(data);

	xdp_buff_clear_frags_flag(xdp);

	xdp_prepare_buff(xdp, data, pp->rx_offset_correction + MVNETA_MH_SIZE,

			 data_len, false);

			 data_len, true);

}



static void
@@ -2396,6 +2396,7 @@ mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, 
		      struct xdp_buff *xdp, u32 desc_status)

{

	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);

	u32 metasize = xdp->data - xdp->data_meta;

	struct sk_buff *skb;

	u8 num_frags;
@@ -2410,6 +2411,8 @@ mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, 


	skb_reserve(skb, xdp->data - xdp->data_hard_start);

	skb_put(skb, xdp->data_end - xdp->data);

	if (metasize)

		skb_metadata_set(skb, metasize);

	skb->ip_summed = mvneta_rx_csum(pp, desc_status);



	if (unlikely(xdp_buff_has_frags(xdp)))