diff options
| author | Song Yoong Siang <yoong.siang.song@intel.com> | 2023-04-15 09:45:03 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-04-18 04:57:26 +0300 |
| commit | 9570df353309d010f6afc7146c88a135ee3d3f8a (patch) | |
| tree | 1dcbef575cc0e96c8aad403e8d2d699b996ef921 /drivers/net | |
| parent | e3f9c3e348406f7016ded85aed119edfcd2de2fa (diff) | |
| download | linux-9570df353309d010f6afc7146c88a135ee3d3f8a.tar.xz | |
net: stmmac: add Rx HWTS metadata to XDP ZC receive pkt
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 2bfcc5347d6a..c0e90fda572a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -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; |