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net/mlx5e: XDP, Replace boolean doorbell indication with segment pointer

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Instead of calculating the control segment to be used upon an
XDP xmit doorbell, save it in SQ structure.
Nullify when no pending doorbell.

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 14:06:02 +02:00 committed by Saeed Mahameed
parent db02a308cd
commit b8180392ed
3 changed files with 9 additions and 18 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -413,7 +413,7 @@ struct mlx5e_xdpsq {
/* dirtied @xmit */
u16 pc ____cacheline_aligned_in_smp;
bool doorbell;
struct mlx5_wqe_ctrl_seg *doorbell_cseg;
struct mlx5e_cq cq;

14
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
View File

@ -126,11 +126,8 @@ bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi)
}
if (unlikely(!mlx5e_wqc_has_room_for(wq, sq->cc, sq->pc, 1))) {
if (sq->doorbell) {
/* SQ is full, ring doorbell */
mlx5e_xmit_xdp_doorbell(sq);
sq->doorbell = false;
}
/* SQ is full, ring doorbell */
mlx5e_xmit_xdp_doorbell(sq);
stats->full++;
return false;
}
@ -158,7 +155,7 @@ bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi)
sq->db.xdpi[pi] = *xdpi;
sq->pc++;
sq->doorbell = true;
sq->doorbell_cseg = cseg;
stats->xmit++;
return true;
@ -309,10 +306,7 @@ 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;
}
mlx5e_xmit_xdp_doorbell(xdpsq);
if (xdpsq->redirect_flush) {
xdp_do_flush_map();

11
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
View File

@ -51,13 +51,10 @@ int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
{
struct mlx5_wq_cyc *wq = &sq->wq;
struct mlx5e_tx_wqe *wqe;
u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc - 1); /* last pi */
wqe = mlx5_wq_cyc_get_wqe(wq, pi);
mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &wqe->ctrl);
if (sq->doorbell_cseg) {
mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, sq->doorbell_cseg);
sq->doorbell_cseg = NULL;
}
}
#endif