net/mlx5e: Let channels be SD-aware

Distribute the channels between the different SD-devices to acheive
local numa node performance on multiple numas.

Each channel works against one specific mdev, creating all datapath
queues against it.

We distribute channels to mdevs in a round-robin policy.

Example for 2 mdevs and 6 channels:
+-------+---------+
| ch ix | mdev ix |
+-------+---------+
|   0   |    0    |
|   1   |    1    |
|   2   |    0    |
|   3   |    1    |
|   4   |    0    |
|   5   |    1    |
+-------+---------+

This round-robin distribution policy is preferred over another suggested
intuitive distribution, in which we first distribute one half of the
channels to mdev #0 and then the second half to mdev #1.

We prefer round-robin for a reason: it is less influenced by changes in
the number of channels. The mapping between channel index and mdev is
fixed, no matter how many channels the user configures. As the channel
stats are persistent to channels closure, changing the mapping every
single time would turn the accumulative stats less representing of the
channel's history.

Per-channel objects should stop using the primary mdev (priv->mdev)
directly, and instead move to using their own channel's mdev.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/en/qos.c
index 34adf8c3f81a..e87e26f2c669 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/qos.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/qos.c
@@ -122,8 +122,8 @@ int mlx5e_open_qos_sq(struct mlx5e_priv *priv, struct mlx5e_channels *chs,
 
 	memset(&param_sq, 0, sizeof(param_sq));
 	memset(&param_cq, 0, sizeof(param_cq));
-	mlx5e_build_sq_param(priv->mdev, params, &param_sq);
-	mlx5e_build_tx_cq_param(priv->mdev, params, &param_cq);
+	mlx5e_build_sq_param(c->mdev, params, &param_sq);
+	mlx5e_build_tx_cq_param(c->mdev, params, &param_cq);
 	err = mlx5e_open_cq(c->mdev, params->tx_cq_moderation, &param_cq, &ccp, &sq->cq);
 	if (err)
 		goto err_free_sq;
@@ -176,7 +176,7 @@ int mlx5e_activate_qos_sq(void *data, u16 node_qid, u32 hw_id)
 	 */
 	smp_wmb();
 
-	qos_dbg(priv->mdev, "Activate QoS SQ qid %u\n", node_qid);
+	qos_dbg(sq->mdev, "Activate QoS SQ qid %u\n", node_qid);
 	mlx5e_activate_txqsq(sq);
 
 	return 0;
@@ -190,7 +190,7 @@ void mlx5e_deactivate_qos_sq(struct mlx5e_priv *priv, u16 qid)
 	if (!sq) /* Handle the case when the SQ failed to open. */
 		return;
 
-	qos_dbg(priv->mdev, "Deactivate QoS SQ qid %u\n", qid);
+	qos_dbg(sq->mdev, "Deactivate QoS SQ qid %u\n", qid);
 	mlx5e_deactivate_txqsq(sq);
 
 	priv->txq2sq[mlx5e_qid_from_qos(&priv->channels, qid)] = NULL;