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net/mlx5: Introduce hierarchy level tracking on scheduling nodes

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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: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1741642016-44918-3-git-send-email-tariqt@nvidia.com
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Carolina Jubran
2025-03-10 23:26:54 +02:00
committed by Paolo Abeni
parent b407b4b804
commit 498bd79cb9
1 changed files with 16 additions and 3 deletions
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19
drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
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@@ -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;
}