netdev - [PATCH net-next 2/7] net: mvpp2: Add metadata support for xdp mode

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Message-Id: <20250311-mvneta-xdp-meta-v1-2-36cf1c99790e@kernel.org>
Date: Tue, 11 Mar 2025 13:18:34 +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 2/7] net: mvpp2: Add metadata support for xdp mode

Set metadata size building the skb from xdp_buff in mvpp2 driver

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index f166dc4e650372d66e248601a5c948819e1dcd79..54a235366a01bdba526a1956f27836bcdee210ae 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -3915,13 +3915,13 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,

 	while (rx_done < rx_todo) {
 		struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq);
+		u32 rx_status, timestamp, metasize = 0;
 		struct mvpp2_bm_pool *bm_pool;
 		struct page_pool *pp = NULL;
 		struct sk_buff *skb;
 		unsigned int frag_size;
 		dma_addr_t dma_addr;
 		phys_addr_t phys_addr;
-		u32 rx_status, timestamp;
 		int pool, rx_bytes, err, ret;
 		struct page *page;
 		void *data;
@@ -3983,7 +3983,7 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
 			xdp_init_buff(&xdp, PAGE_SIZE, xdp_rxq);
 			xdp_prepare_buff(&xdp, data,
 					 MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM,
-					 rx_bytes, false);
+					 rx_bytes, true);

 			ret = mvpp2_run_xdp(port, xdp_prog, &xdp, pp, &ps);

@@ -3999,6 +3999,8 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
 				ps.rx_bytes += rx_bytes;
 				continue;
 			}
+
+			metasize = xdp.data - xdp.data_meta;
 		}

 		if (frag_size)
@@ -4038,6 +4040,8 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,

 		skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM);
 		skb_put(skb, rx_bytes);
+		if (metasize)
+			skb_metadata_set(skb, metasize);
 		skb->ip_summed = mvpp2_rx_csum(port, rx_status);
 		skb->protocol = eth_type_trans(skb, dev);

-- 
2.48.1