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net/mlx5: Verify support for scheduling element and TSAR type
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Before creating a scheduling element in a NIC or E-Switch scheduler,
ensure that the requested element type is supported. If the element is
of type Transmit Scheduling Arbiter (TSAR), also verify that the
specific TSAR type is supported.

Fixes: 214baf2 ("net/mlx5e: Support HTB offload")
Fixes: 85c5f7c ("net/mlx5: E-switch, Create QoS on demand")
Fixes: 0fe132e ("net/mlx5: E-switch, Allow to add vports to rate groups")
Signed-off-by: Carolina Jubran <[email protected]>
Reviewed-by: Cosmin Ratiu <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
Signed-off-by: NipaLocal <nipa@local>
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@cjubran
cjubran authored and NipaLocal committed Sep 10, 2024
1 parent 251360a commit 3e7b202
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Showing 2 changed files with 31 additions and 20 deletions.
44 changes: 24 additions & 20 deletions drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -312,6 +312,25 @@ static int esw_qos_set_group_max_rate(struct mlx5_eswitch *esw,
return err;
}

static bool esw_qos_element_type_supported(struct mlx5_core_dev *dev, int type)
{
switch (type) {
case SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_TSAR;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_VPORT;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT_TC:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_VPORT_TC;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_PARA_VPORT_TC:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_PARA_VPORT_TC;
}
return false;
}

static int esw_qos_vport_create_sched_element(struct mlx5_eswitch *esw,
struct mlx5_vport *vport,
u32 max_rate, u32 bw_share)
Expand All @@ -323,6 +342,9 @@ static int esw_qos_vport_create_sched_element(struct mlx5_eswitch *esw,
void *vport_elem;
int err;

if (!esw_qos_element_type_supported(dev, SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT))
return -EOPNOTSUPP;

parent_tsar_ix = group ? group->tsar_ix : esw->qos.root_tsar_ix;
MLX5_SET(scheduling_context, sched_ctx, element_type,
SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT);
Expand Down Expand Up @@ -533,25 +555,6 @@ static int esw_qos_destroy_rate_group(struct mlx5_eswitch *esw,
return err;
}

static bool esw_qos_element_type_supported(struct mlx5_core_dev *dev, int type)
{
switch (type) {
case SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_TSAR;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_VPORT;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_VPORT_TC:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_VPORT_TC;
case SCHEDULING_CONTEXT_ELEMENT_TYPE_PARA_VPORT_TC:
return MLX5_CAP_QOS(dev, esw_element_type) &
ELEMENT_TYPE_CAP_MASK_PARA_VPORT_TC;
}
return false;
}

static int esw_qos_create(struct mlx5_eswitch *esw, struct netlink_ext_ack *extack)
{
u32 tsar_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {};
Expand All @@ -562,7 +565,8 @@ static int esw_qos_create(struct mlx5_eswitch *esw, struct netlink_ext_ack *exta
if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, esw_scheduling))
return -EOPNOTSUPP;

if (!esw_qos_element_type_supported(dev, SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR))
if (!esw_qos_element_type_supported(dev, SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR) ||
!(MLX5_CAP_QOS(dev, esw_tsar_type) & TSAR_TYPE_CAP_MASK_DWRR))
return -EOPNOTSUPP;

MLX5_SET(scheduling_context, tsar_ctx, element_type,
Expand Down
7 changes: 7 additions & 0 deletions drivers/net/ethernet/mellanox/mlx5/core/qos.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@ int mlx5_qos_create_leaf_node(struct mlx5_core_dev *mdev, u32 parent_id,
{
u32 sched_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};

if (!(MLX5_CAP_QOS(mdev, nic_element_type) & ELEMENT_TYPE_CAP_MASK_QUEUE_GROUP))
return -EOPNOTSUPP;

MLX5_SET(scheduling_context, sched_ctx, parent_element_id, parent_id);
MLX5_SET(scheduling_context, sched_ctx, element_type,
SCHEDULING_CONTEXT_ELEMENT_TYPE_QUEUE_GROUP);
Expand All @@ -44,6 +47,10 @@ int mlx5_qos_create_inner_node(struct mlx5_core_dev *mdev, u32 parent_id,
u32 sched_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};
void *attr;

if (!(MLX5_CAP_QOS(mdev, nic_element_type) & ELEMENT_TYPE_CAP_MASK_TSAR) ||
!(MLX5_CAP_QOS(mdev, nic_tsar_type) & TSAR_TYPE_CAP_MASK_DWRR))
return -EOPNOTSUPP;

MLX5_SET(scheduling_context, sched_ctx, parent_element_id, parent_id);
MLX5_SET(scheduling_context, sched_ctx, element_type,
SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
Expand Down

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