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net/mlx4_en: Introduce wrapper for xdp_buff

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No functional changes. Boilerplate to allow stuffing more data after xdp_buff.

Cc: John Fastabend <john.fastabend@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Maryam Tahhan <mtahhan@redhat.com>
Cc: xdp-hints@xdp-project.net
Cc: netdev@vger.kernel.org
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20230119221536.3349901-13-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Stanislav Fomichev 2023-01-19 14:15:31 -08:00 committed by Martin KaFai Lau
parent e2a46d54d7
commit 4444584dcb
1 changed files with 15 additions and 11 deletions
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26
drivers/net/ethernet/mellanox/mlx4/en_rx.c
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@ -661,9 +661,14 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
#define MLX4_CQE_STATUS_IP_ANY (MLX4_CQE_STATUS_IPV4)
#endif
struct mlx4_en_xdp_buff {
struct xdp_buff xdp;
};
int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_xdp_buff mxbuf = {};
int factor = priv->cqe_factor;
struct mlx4_en_rx_ring *ring;
struct bpf_prog *xdp_prog;
@ -671,7 +676,6 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
bool doorbell_pending;
bool xdp_redir_flush;
struct mlx4_cqe *cqe;
struct xdp_buff xdp;
int polled = 0;
int index;
@ -681,7 +685,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
ring = priv->rx_ring[cq_ring];
xdp_prog = rcu_dereference_bh(ring->xdp_prog);
xdp_init_buff(&xdp, priv->frag_info[0].frag_stride, &ring->xdp_rxq);
xdp_init_buff(&mxbuf.xdp, priv->frag_info[0].frag_stride, &ring->xdp_rxq);
doorbell_pending = false;
xdp_redir_flush = false;
@ -776,24 +780,24 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
priv->frag_info[0].frag_size,
DMA_FROM_DEVICE);
xdp_prepare_buff(&xdp, va - frags[0].page_offset,
xdp_prepare_buff(&mxbuf.xdp, va - frags[0].page_offset,
frags[0].page_offset, length, false);
orig_data = xdp.data;
orig_data = mxbuf.xdp.data;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
act = bpf_prog_run_xdp(xdp_prog, &mxbuf.xdp);
length = xdp.data_end - xdp.data;
if (xdp.data != orig_data) {
frags[0].page_offset = xdp.data -
xdp.data_hard_start;
va = xdp.data;
length = mxbuf.xdp.data_end - mxbuf.xdp.data;
if (mxbuf.xdp.data != orig_data) {
frags[0].page_offset = mxbuf.xdp.data -
mxbuf.xdp.data_hard_start;
va = mxbuf.xdp.data;
}
switch (act) {
case XDP_PASS:
break;
case XDP_REDIRECT:
if (likely(!xdp_do_redirect(dev, &xdp, xdp_prog))) {
if (likely(!xdp_do_redirect(dev, &mxbuf.xdp, xdp_prog))) {
ring->xdp_redirect++;
xdp_redir_flush = true;
frags[0].page = NULL;