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net/mlx5e: Use multiple CQ doorbells

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Channel doorbells are now also used by all channel CQs.

A new 'uar' parameter is added to 'struct mlx5e_create_cq_param',
which is then used in mlx5e_alloc_cq.

A single UAR page has two TX doorbells and a single CQ doorbell, so
every consecutive pair of 'struct mlx5_sq_bfreg' (TX doorbells)
uses the same underlying 'struct mlx5_uars_page' (CQ doorbell).
So by using c->bfreg->up, CQs from every consecutive channel pair will
share the same CQ doorbell.

Non-channel associated CQs keep using the global CQ doorbell.

Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Cosmin Ratiu 2025-09-16 17:11:42 +03:00 committed by Jakub Kicinski
parent 71fb4832d5
commit 325db9c6f6
5 changed files with 6 additions and 1 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -1062,6 +1062,7 @@ struct mlx5e_create_cq_param {
struct mlx5e_ch_stats *ch_stats;
int node;
int ix;
struct mlx5_uars_page *uar;
};
struct mlx5e_cq_param;

1
drivers/net/ethernet/mellanox/mlx5/core/en/params.c
View File

@ -611,6 +611,7 @@ void mlx5e_build_create_cq_param(struct mlx5e_create_cq_param *ccp, struct mlx5e
.ch_stats = c->stats,
.node = cpu_to_node(c->cpu),
.ix = c->vec_ix,
.uar = c->bfreg->up,
};
}

2
drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
View File

@ -578,6 +578,7 @@ static int mlx5e_ptp_open_tx_cqs(struct mlx5e_ptp *c,
ccp.ch_stats = c->stats;
ccp.napi = &c->napi;
ccp.ix = MLX5E_PTP_CHANNEL_IX;
ccp.uar = c->bfreg->up;
cq_param = &cparams->txq_sq_param.cqp;
@ -627,6 +628,7 @@ static int mlx5e_ptp_open_rx_cq(struct mlx5e_ptp *c,
ccp.ch_stats = c->stats;
ccp.napi = &c->napi;
ccp.ix = MLX5E_PTP_CHANNEL_IX;
ccp.uar = c->bfreg->up;
cq_param = &cparams->rq_param.cqp;

1
drivers/net/ethernet/mellanox/mlx5/core/en/trap.c
View File

@ -76,6 +76,7 @@ static int mlx5e_open_trap_rq(struct mlx5e_priv *priv, struct mlx5e_trap *t)
ccp.ch_stats = t->stats;
ccp.napi = &t->napi;
ccp.ix = 0;
ccp.uar = mdev->priv.bfreg.up;
err = mlx5e_open_cq(priv->mdev, trap_moder, &rq_param->cqp, &ccp, &rq->cq);
if (err)
return err;

2
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -2238,7 +2238,7 @@ static int mlx5e_alloc_cq(struct mlx5_core_dev *mdev,
param->eq_ix = ccp->ix;
err = mlx5e_alloc_cq_common(mdev, ccp->netdev, ccp->wq,
mdev->priv.bfreg.up, param, cq);
ccp->uar, param, cq);
cq->napi = ccp->napi;
cq->ch_stats = ccp->ch_stats;