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net/mlx5e: XDP, Precede XDP-related operations in RQ poll by a loaded program check 

At the end of the RQ polling loop, some XDP-related operations
might be required. Before checking them one by one, check if
an XDP program is even loaded.
Combine all the checks and operations in a single function in xdp files.

This saves unnecessary checks for non-XDP flows.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2018-11-21 13:56:17 +02:00 committed by Saeed Mahameed
parent e05b8d4fc3
commit 4fb2f51618
3 changed files with 18 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
View File

@ -305,3 +305,18 @@ int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
return n - drops;
}
void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq)
{
struct mlx5e_xdpsq *xdpsq = &rq->xdpsq;
if (xdpsq->doorbell) {
mlx5e_xmit_xdp_doorbell(xdpsq);
xdpsq->doorbell = false;
}
if (xdpsq->redirect_flush) {
xdp_do_flush_map();
xdpsq->redirect_flush = false;
}
}

2
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
View File

@ -44,7 +44,7 @@ bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di,
void *va, u16 *rx_headroom, u32 *len);
bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq);
void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq);
void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq);
bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi);
int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
u32 flags);

12
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -1190,7 +1190,6 @@ mpwrq_cqe_out:
int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
{
struct mlx5e_rq *rq = container_of(cq, struct mlx5e_rq, cq);
struct mlx5e_xdpsq *xdpsq = &rq->xdpsq;
struct mlx5_cqe64 *cqe;
int work_done = 0;
@ -1221,15 +1220,8 @@ int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
} while ((++work_done < budget) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
out:
if (xdpsq->doorbell) {
mlx5e_xmit_xdp_doorbell(xdpsq);
xdpsq->doorbell = false;
}
if (xdpsq->redirect_flush) {
xdp_do_flush_map();
xdpsq->redirect_flush = false;
}
if (rq->xdp_prog)
mlx5e_xdp_rx_poll_complete(rq);
mlx5_cqwq_update_db_record(&cq->wq);