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net: ti: cpsw: Add metadata support for xdp mode

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Set metadata size building the skb from xdp_buff in cpsw/cpsw_new
drivers. ti cpsw and cpsw_new drivers set xdp headroom at least to
CPSW_HEADROOM_NA:

CPSW_HEADROOM_NA max(XDP_PACKET_HEADROOM, NET_SKB_PAD) + NET_IP_ALIGN

so the headroom is large enough to contain xdp_frame and xdp metadata.
Please note this patch is just compiled tested.

Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250318-mvneta-xdp-meta-v2-7-b6075778f61f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi
2025-03-18 12:46:11 +01:00
committed by Jakub Kicinski
parent c313d35f60
commit b3a54be70c
2 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/ethernet/ti/cpsw.c
View File

@@ -351,6 +351,7 @@ static void cpsw_rx_handler(void *token, int len, int status)
int ret = 0, port, ch = xmeta->ch;
int headroom = CPSW_HEADROOM_NA;
struct net_device *ndev = xmeta->ndev;
u32 metasize = 0;
struct cpsw_priv *priv;
struct page_pool *pool;
struct sk_buff *skb;
@@ -400,7 +401,7 @@ static void cpsw_rx_handler(void *token, int len, int status)
size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
}
xdp_prepare_buff(&xdp, pa, headroom, size, false);
xdp_prepare_buff(&xdp, pa, headroom, size, true);
port = priv->emac_port + cpsw->data.dual_emac;
ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len);
@@ -408,6 +409,7 @@ static void cpsw_rx_handler(void *token, int len, int status)
goto requeue;
headroom = xdp.data - xdp.data_hard_start;
metasize = xdp.data - xdp.data_meta;
/* XDP prog can modify vlan tag, so can't use encap header */
status &= ~CPDMA_RX_VLAN_ENCAP;
@@ -423,6 +425,8 @@ static void cpsw_rx_handler(void *token, int len, int status)
skb_reserve(skb, headroom);
skb_put(skb, len);
if (metasize)
skb_metadata_set(skb, metasize);
skb->dev = ndev;
if (status & CPDMA_RX_VLAN_ENCAP)
cpsw_rx_vlan_encap(skb);

6
drivers/net/ethernet/ti/cpsw_new.c
View File

@@ -293,6 +293,7 @@ static void cpsw_rx_handler(void *token, int len, int status)
struct page_pool *pool;
struct sk_buff *skb;
struct xdp_buff xdp;
u32 metasize = 0;
int ret = 0;
dma_addr_t dma;
@@ -345,13 +346,14 @@ static void cpsw_rx_handler(void *token, int len, int status)
size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
}
xdp_prepare_buff(&xdp, pa, headroom, size, false);
xdp_prepare_buff(&xdp, pa, headroom, size, true);
ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port, &len);
if (ret != CPSW_XDP_PASS)
goto requeue;
headroom = xdp.data - xdp.data_hard_start;
metasize = xdp.data - xdp.data_meta;
/* XDP prog can modify vlan tag, so can't use encap header */
status &= ~CPDMA_RX_VLAN_ENCAP;
@@ -368,6 +370,8 @@ static void cpsw_rx_handler(void *token, int len, int status)
skb->offload_fwd_mark = priv->offload_fwd_mark;
skb_reserve(skb, headroom);
skb_put(skb, len);
if (metasize)
skb_metadata_set(skb, metasize);
skb->dev = ndev;
if (status & CPDMA_RX_VLAN_ENCAP)
cpsw_rx_vlan_encap(skb);