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net/mlx5e: Add XDP multi buffer support to the non-linear legacy RQ

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This commit adds XDP multi buffer support to the RX path in the
non-linear legacy RQ mode. mlx5e_xdp_handle is called from
mlx5e_skb_from_cqe_nonlinear.

XDP_TX action for fragmented XDP frames is not yet supported and
blocked.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Maxim Mikityanskiy 2022-01-27 17:01:05 +02:00 committed by Saeed Mahameed
parent d51f4a4cca
commit ea5d49bdae
2 changed files with 18 additions and 0 deletions
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5
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
View File

@ -68,6 +68,11 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq,
if (unlikely(!xdpf))
return false;
if (unlikely(xdp_frame_has_frags(xdpf))) {
xdp_return_frame(xdpf);
return false;
}
xdptxd.data = xdpf->data;
xdptxd.len = xdpf->len;

13
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -1572,6 +1572,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
struct mlx5e_dma_info *di = wi->di;
struct skb_shared_info *sinfo;
u32 frag_consumed_bytes;
struct bpf_prog *prog;
struct xdp_buff xdp;
struct sk_buff *skb;
u32 truesize;
@ -1582,6 +1583,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
dma_sync_single_range_for_cpu(rq->pdev, di->addr, wi->offset,
rq->buff.frame0_sz, DMA_FROM_DEVICE);
net_prefetchw(va); /* xdp_frame data area */
net_prefetch(va + rx_headroom);
mlx5e_fill_xdp_buff(rq, va, rx_headroom, frag_consumed_bytes, &xdp);
@ -1629,6 +1631,17 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
di = head_wi->di;
prog = rcu_dereference(rq->xdp_prog);
if (prog && mlx5e_xdp_handle(rq, di, prog, &xdp)) {
if (test_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
int i;
for (i = wi - head_wi; i < rq->wqe.info.num_frags; i++)
mlx5e_put_rx_frag(rq, &head_wi[i], true);
}
return NULL; /* page/packet was consumed by XDP */
}
skb = mlx5e_build_linear_skb(rq, xdp.data_hard_start, rq->buff.frame0_sz,
xdp.data - xdp.data_hard_start,
xdp.data_end - xdp.data,