Commit 498bd79c authored by Carolina Jubran's avatar Carolina Jubran Committed by Paolo Abeni
Browse files

net/mlx5: Introduce hierarchy level tracking on scheduling nodes 



Add a `level` field to `mlx5_esw_sched_node` to track the hierarchy
depth of each scheduling node. This allows enforcement of the
scheduling depth constraints based on `log_esw_max_sched_depth`.

Modify `esw_qos_node_set_parent()` and `__esw_qos_alloc_node()` to
correctly assign hierarchy levels. Ensure that nodes inherit their
parent’s level incrementally.

Signed-off-by: default avatarCarolina Jubran <cjubran@nvidia.com>
Reviewed-by: default avatarCosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: default avatarDragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: default avatarTariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1741642016-44918-3-git-send-email-tariqt@nvidia.com


Reviewed-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent b407b4b8

drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c

+16 −3
Original line number Diff line number Diff line
@@ -90,8 +90,22 @@ struct mlx5_esw_sched_node { 
	struct list_head children;

	/* Valid only if this node is associated with a vport. */

	struct mlx5_vport *vport;

	/* Level in the hierarchy. The root node level is 1. */

	u8 level;

};



static void esw_qos_node_attach_to_parent(struct mlx5_esw_sched_node *node)

{

	if (!node->parent) {

		/* Root children are assigned a depth level of 2. */

		node->level = 2;

		list_add_tail(&node->entry, &node->esw->qos.domain->nodes);

	} else {

		node->level = node->parent->level + 1;

		list_add_tail(&node->entry, &node->parent->children);

	}

}



static void

esw_qos_node_set_parent(struct mlx5_esw_sched_node *node, struct mlx5_esw_sched_node *parent)

{
@@ -99,6 +113,7 @@ esw_qos_node_set_parent(struct mlx5_esw_sched_node *node, struct mlx5_esw_sched_ 
	node->parent = parent;

	list_add_tail(&node->entry, &parent->children);

	node->esw = parent->esw;

	node->level = parent->level + 1;

}



void mlx5_esw_qos_vport_qos_free(struct mlx5_vport *vport)
@@ -358,7 +373,6 @@ static struct mlx5_esw_sched_node * 
__esw_qos_alloc_node(struct mlx5_eswitch *esw, u32 tsar_ix, enum sched_node_type type,

		     struct mlx5_esw_sched_node *parent)

{

	struct list_head *parent_children;

	struct mlx5_esw_sched_node *node;



	node = kzalloc(sizeof(*node), GFP_KERNEL);
@@ -370,8 +384,7 @@ __esw_qos_alloc_node(struct mlx5_eswitch *esw, u32 tsar_ix, enum sched_node_type 
	node->type = type;

	node->parent = parent;

	INIT_LIST_HEAD(&node->children);

	parent_children = parent ? &parent->children : &esw->qos.domain->nodes;

	list_add_tail(&node->entry, parent_children);

	esw_qos_node_attach_to_parent(node);



	return node;

}