netdev - [PATCH net-next 5/7] net: ethernet: mediatek: Add metadata support for xdp mode

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Message-Id: <20250311-mvneta-xdp-meta-v1-5-36cf1c99790e@kernel.org>
Date: Tue, 11 Mar 2025 13:18:37 +0100
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Marcin Wojtas <marcin.s.wojtas@...il.com>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 Ilias Apalodimas <ilias.apalodimas@...aro.org>, 
 Masahisa Kojima <kojima.masahisa@...ionext.com>, 
 Sunil Goutham <sgoutham@...vell.com>, Geetha sowjanya <gakula@...vell.com>, 
 Subbaraya Sundeep <sbhatta@...vell.com>, hariprasad <hkelam@...vell.com>, 
 Bharat Bhushan <bbhushan2@...vell.com>, Felix Fietkau <nbd@....name>, 
 Sean Wang <sean.wang@...iatek.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 "K. Y. Srinivasan" <kys@...rosoft.com>, 
 Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, 
 Dexuan Cui <decui@...rosoft.com>, Siddharth Vadapalli <s-vadapalli@...com>, 
 Roger Quadros <rogerq@...nel.org>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-hyperv@...r.kernel.org, linux-omap@...r.kernel.org, 
 Lorenzo Bianconi <lorenzo@...nel.org>
Subject: [PATCH net-next 5/7] net: ethernet: mediatek: Add metadata support
 for xdp mode

Set metadata size building the skb from xdp_buff in mediatek driver

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 922330b3f4d70421276ecd3f4ab175b3ae263f71..43197b28b3e745319e974c6022a6a51b6953f60a 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2122,7 +2122,7 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
 		if (ring->page_pool) {
 			struct page *page = virt_to_head_page(data);
 			struct xdp_buff xdp;
-			u32 ret;
+			u32 ret, metasize;

 			new_data = mtk_page_pool_get_buff(ring->page_pool,
 							  &dma_addr,
@@ -2138,7 +2138,7 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,

 			xdp_init_buff(&xdp, PAGE_SIZE, &ring->xdp_q);
 			xdp_prepare_buff(&xdp, data, MTK_PP_HEADROOM, pktlen,
-					 false);
+					 true);
 			xdp_buff_clear_frags_flag(&xdp);

 			ret = mtk_xdp_run(eth, ring, &xdp, netdev);
@@ -2158,6 +2158,9 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,

 			skb_reserve(skb, xdp.data - xdp.data_hard_start);
 			skb_put(skb, xdp.data_end - xdp.data);
+			metasize = xdp.data - xdp.data_meta;
+			if (metasize)
+				skb_metadata_set(skb, metasize);
 			skb_mark_for_recycle(skb);
 		} else {
 			if (ring->frag_size <= PAGE_SIZE)

-- 
2.48.1