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net: stmmac: add Rx HWTS metadata to XDP ZC receive pkt

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Add receive hardware timestamp metadata support via kfunc to XDP Zero Copy
receive packets.

Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Song Yoong Siang 2023-04-15 14:45:03 +08:00 committed by Jakub Kicinski
parent e3f9c3e348
commit 9570df3533
1 changed files with 22 additions and 0 deletions
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22
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -1614,6 +1614,12 @@ static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv,
struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
/* struct stmmac_xdp_buff is using cb field (maximum size of 24 bytes)
* in struct xdp_buff_xsk to stash driver specific information. Thus,
* use this macro to make sure no size violations.
*/
XSK_CHECK_PRIV_TYPE(struct stmmac_xdp_buff);
for (i = 0; i < dma_conf->dma_rx_size; i++) {
struct stmmac_rx_buffer *buf;
dma_addr_t dma_addr;
@ -4998,6 +5004,16 @@ static bool stmmac_rx_refill_zc(struct stmmac_priv *priv, u32 queue, u32 budget)
return ret;
}
static struct stmmac_xdp_buff *xsk_buff_to_stmmac_ctx(struct xdp_buff *xdp)
{
/* In XDP zero copy data path, xdp field in struct xdp_buff_xsk is used
* to represent incoming packet, whereas cb field in the same structure
* is used to store driver specific info. Thus, struct stmmac_xdp_buff
* is laid on top of xdp and cb fields of struct xdp_buff_xsk.
*/
return (struct stmmac_xdp_buff *)xdp;
}
static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
@ -5027,6 +5043,7 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue)
}
while (count < limit) {
struct stmmac_rx_buffer *buf;
struct stmmac_xdp_buff *ctx;
unsigned int buf1_len = 0;
struct dma_desc *np, *p;
int entry;
@ -5112,6 +5129,11 @@ read_again:
goto read_again;
}
ctx = xsk_buff_to_stmmac_ctx(buf->xdp);
ctx->priv = priv;
ctx->desc = p;
ctx->ndesc = np;
/* XDP ZC Frame only support primary buffers for now */
buf1_len = stmmac_rx_buf1_len(priv, p, status, len);
len += buf1_len;