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net/mlx5e: Hardware offloaded flower filter statistics support

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Introduce support in updating statistics of offloaded TC flower
classifiers. Currently only the DROP action is supported.

Signed-off-by: Amir Vadai <amirva@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amir Vadai 2016-05-13 12:55:42 +00:00 committed by David S. Miller
parent 43a335e055
commit aad7e08d39
3 changed files with 69 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

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

@ -2154,6 +2154,8 @@ static int mlx5e_ndo_setup_tc(struct net_device *dev, u32 handle,
return mlx5e_configure_flower(priv, proto, tc->cls_flower);
case TC_CLSFLOWER_DESTROY:
return mlx5e_delete_flower(priv, tc->cls_flower);
case TC_CLSFLOWER_STATS:
return mlx5e_stats_flower(priv, tc->cls_flower);
}
default:
return -EOPNOTSUPP;

71
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View file

@ -53,13 +53,24 @@ static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
u32 *match_c, u32 *match_v,
u32 action, u32 flow_tag)
{
struct mlx5_flow_destination dest = {
.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
{.ft = priv->fs.vlan.ft.t},
};
struct mlx5_core_dev *dev = priv->mdev;
struct mlx5_flow_destination dest = { 0 };
struct mlx5_fc *counter = NULL;
struct mlx5_flow_rule *rule;
bool table_created = false;
if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
dest.ft = priv->fs.vlan.ft.t;
} else {
counter = mlx5_fc_create(dev, true);
if (IS_ERR(counter))
return ERR_CAST(counter);
dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
dest.counter = counter;
}
if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
priv->fs.tc.t =
mlx5_create_auto_grouped_flow_table(priv->fs.ns,
@ -70,7 +81,8 @@ static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
if (IS_ERR(priv->fs.tc.t)) {
netdev_err(priv->netdev,
"Failed to create tc offload table\n");
return ERR_CAST(priv->fs.tc.t);
rule = ERR_CAST(priv->fs.tc.t);
goto err_create_ft;
}
table_created = true;
@ -79,12 +91,20 @@ static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
rule = mlx5_add_flow_rule(priv->fs.tc.t, MLX5_MATCH_OUTER_HEADERS,
match_c, match_v,
action, flow_tag,
action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST ? &dest : NULL);
&dest);
if (IS_ERR(rule) && table_created) {
if (IS_ERR(rule))
goto err_add_rule;
return rule;
err_add_rule:
if (table_created) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
err_create_ft:
mlx5_fc_destroy(dev, counter);
return rule;
}
@ -92,8 +112,14 @@ static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
struct mlx5_flow_rule *rule)
{
struct mlx5_fc *counter = NULL;
counter = mlx5_flow_rule_counter(rule);
mlx5_del_flow_rule(rule);
mlx5_fc_destroy(priv->mdev, counter);
if (!mlx5e_tc_num_filters(priv)) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
@ -286,6 +312,9 @@ static int parse_tc_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
if (is_tcf_gact_shot(a)) {
*action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
if (MLX5_CAP_FLOWTABLE(priv->mdev,
flow_table_properties_nic_receive.flow_counter))
*action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
continue;
}
@ -394,6 +423,34 @@ int mlx5e_delete_flower(struct mlx5e_priv *priv,
return 0;
}
int mlx5e_stats_flower(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
struct mlx5e_tc_flow *flow;
struct tc_action *a;
struct mlx5_fc *counter;
u64 bytes;
u64 packets;
u64 lastuse;
flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
tc->ht_params);
if (!flow)
return -EINVAL;
counter = mlx5_flow_rule_counter(flow->rule);
if (!counter)
return 0;
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
tc_for_each_action(a, f->exts)
tcf_action_stats_update(a, bytes, packets, lastuse);
return 0;
}
static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
.head_offset = offsetof(struct mlx5e_tc_flow, node),
.key_offset = offsetof(struct mlx5e_tc_flow, cookie),

3
drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
View file

@ -43,6 +43,9 @@ int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
int mlx5e_delete_flower(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f);
int mlx5e_stats_flower(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f);
static inline int mlx5e_tc_num_filters(struct mlx5e_priv *priv)
{
return atomic_read(&priv->fs.tc.ht.nelems);