Commit b87c57ae authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Daniel Borkmann

net: mlx5: Add xdp tx return bulking support

Convert mlx5 driver to xdp_return_frame_bulk APIs.

XDP_REDIRECT (upstream codepath): 8.9Mpps
XDP_REDIRECT (upstream codepath + bulking APIs): 10.2Mpps
Co-developed-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Tested-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/250460319fd868b7b5668fc1deca74dd42813a90.1605267335.git.lorenzo@kernel.org
parent dbef19cc
......@@ -366,7 +366,8 @@ mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd,
static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
struct mlx5e_xdp_wqe_info *wi,
u32 *xsk_frames,
bool recycle)
bool recycle,
struct xdp_frame_bulk *bq)
{
struct mlx5e_xdp_info_fifo *xdpi_fifo = &sq->db.xdpi_fifo;
u16 i;
......@@ -379,7 +380,7 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
/* XDP_TX from the XSK RQ and XDP_REDIRECT */
dma_unmap_single(sq->pdev, xdpi.frame.dma_addr,
xdpi.frame.xdpf->len, DMA_TO_DEVICE);
xdp_return_frame(xdpi.frame.xdpf);
xdp_return_frame_bulk(xdpi.frame.xdpf, bq);
break;
case MLX5E_XDP_XMIT_MODE_PAGE:
/* XDP_TX from the regular RQ */
......@@ -397,12 +398,15 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
{
struct xdp_frame_bulk bq;
struct mlx5e_xdpsq *sq;
struct mlx5_cqe64 *cqe;
u32 xsk_frames = 0;
u16 sqcc;
int i;
xdp_frame_bulk_init(&bq);
sq = container_of(cq, struct mlx5e_xdpsq, cq);
if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
......@@ -434,7 +438,7 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
sqcc += wi->num_wqebbs;
mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, true);
mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, true, &bq);
} while (!last_wqe);
if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) {
......@@ -447,6 +451,8 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
}
} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
xdp_flush_frame_bulk(&bq);
if (xsk_frames)
xsk_tx_completed(sq->xsk_pool, xsk_frames);
......@@ -463,8 +469,13 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
{
struct xdp_frame_bulk bq;
u32 xsk_frames = 0;
xdp_frame_bulk_init(&bq);
rcu_read_lock(); /* need for xdp_return_frame_bulk */
while (sq->cc != sq->pc) {
struct mlx5e_xdp_wqe_info *wi;
u16 ci;
......@@ -474,9 +485,12 @@ void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
sq->cc += wi->num_wqebbs;
mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, false);
mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, false, &bq);
}
xdp_flush_frame_bulk(&bq);
rcu_read_unlock();
if (xsk_frames)
xsk_tx_completed(sq->xsk_pool, xsk_frames);
}
......
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