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Message-Id: <20221209001420.142794-12-saeed@kernel.org>
Date: Thu, 8 Dec 2022 16:14:16 -0800
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
Tariq Toukan <tariqt@...dia.com>, Oz Shlomo <ozsh@...dia.com>,
Roi Dayan <roid@...dia.com>
Subject: [net-next 11/15] net/mlx5e: meter, add mtu post meter tables
From: Oz Shlomo <ozsh@...dia.com>
TC police action may configure the maximum packet size to be handled by
the policer, in addition to byte/packet rate.
MTU check is realized in hardware using the range destination, specifying
a hit ft, if packet len is in the range, or miss ft otherwise.
Instantiate mtu green/red flow tables with a single match-all rule.
Add the green/red actions to the hit/miss table accordingly.
Signed-off-by: Oz Shlomo <ozsh@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../mellanox/mlx5/core/en/tc/post_meter.c | 184 +++++++++++++++++-
.../mellanox/mlx5/core/en/tc/post_meter.h | 7 +
.../net/ethernet/mellanox/mlx5/core/en_tc.c | 1 +
3 files changed, 185 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.c
index 7b2387eef34c..ffed3af7d01e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.c
@@ -17,8 +17,24 @@ struct mlx5e_post_meter_rate_table {
struct mlx5_flow_attr *red_attr;
};
+struct mlx5e_post_meter_mtu_table {
+ struct mlx5_flow_table *ft;
+ struct mlx5_flow_group *fg;
+ struct mlx5_flow_handle *rule;
+ struct mlx5_flow_attr *attr;
+};
+
+struct mlx5e_post_meter_mtu_tables {
+ struct mlx5e_post_meter_mtu_table green_table;
+ struct mlx5e_post_meter_mtu_table red_table;
+};
+
struct mlx5e_post_meter_priv {
- struct mlx5e_post_meter_rate_table rate_steering_table;
+ enum mlx5e_post_meter_type type;
+ union {
+ struct mlx5e_post_meter_rate_table rate_steering_table;
+ struct mlx5e_post_meter_mtu_tables mtu_tables;
+ };
};
struct mlx5_flow_table *
@@ -98,7 +114,6 @@ mlx5e_post_meter_add_rule(struct mlx5e_priv *priv,
else
attr->counter = act_counter;
- attr->ft = post_meter->rate_steering_table.ft;
attr->flags |= MLX5_ATTR_FLAG_NO_IN_PORT;
attr->outer_match_level = MLX5_MATCH_NONE;
attr->chain = 0;
@@ -134,7 +149,7 @@ mlx5e_post_meter_rate_rules_create(struct mlx5e_priv *priv,
mlx5e_tc_match_to_reg_match(spec, PACKET_COLOR_TO_REG,
MLX5_FLOW_METER_COLOR_RED, MLX5_PACKET_COLOR_MASK);
-
+ red_attr->ft = post_meter->rate_steering_table.ft;
rule = mlx5e_post_meter_add_rule(priv, post_meter, spec, red_attr,
act_counter, drop_counter);
if (IS_ERR(rule)) {
@@ -147,6 +162,7 @@ mlx5e_post_meter_rate_rules_create(struct mlx5e_priv *priv,
mlx5e_tc_match_to_reg_match(spec, PACKET_COLOR_TO_REG,
MLX5_FLOW_METER_COLOR_GREEN, MLX5_PACKET_COLOR_MASK);
+ green_attr->ft = post_meter->rate_steering_table.ft;
rule = mlx5e_post_meter_add_rule(priv, post_meter, spec, green_attr,
act_counter, drop_counter);
if (IS_ERR(rule)) {
@@ -189,6 +205,33 @@ mlx5e_post_meter_rate_table_destroy(struct mlx5e_post_meter_priv *post_meter)
mlx5_destroy_flow_table(post_meter->rate_steering_table.ft);
}
+static void
+mlx5e_post_meter_mtu_rules_destroy(struct mlx5e_post_meter_priv *post_meter)
+{
+ struct mlx5e_post_meter_mtu_tables *mtu_tables = &post_meter->mtu_tables;
+
+ mlx5_del_flow_rules(mtu_tables->green_table.rule);
+ mlx5_del_flow_rules(mtu_tables->red_table.rule);
+}
+
+static void
+mlx5e_post_meter_mtu_fg_destroy(struct mlx5e_post_meter_priv *post_meter)
+{
+ struct mlx5e_post_meter_mtu_tables *mtu_tables = &post_meter->mtu_tables;
+
+ mlx5_destroy_flow_group(mtu_tables->green_table.fg);
+ mlx5_destroy_flow_group(mtu_tables->red_table.fg);
+}
+
+static void
+mlx5e_post_meter_mtu_table_destroy(struct mlx5e_post_meter_priv *post_meter)
+{
+ struct mlx5e_post_meter_mtu_tables *mtu_tables = &post_meter->mtu_tables;
+
+ mlx5_destroy_flow_table(mtu_tables->green_table.ft);
+ mlx5_destroy_flow_table(mtu_tables->red_table.ft);
+}
+
static int
mlx5e_post_meter_rate_create(struct mlx5e_priv *priv,
enum mlx5_flow_namespace_type ns_type,
@@ -202,6 +245,8 @@ mlx5e_post_meter_rate_create(struct mlx5e_priv *priv,
struct mlx5_flow_table *ft;
int err;
+ post_meter->type = MLX5E_POST_METER_RATE;
+
ft = mlx5e_post_meter_table_create(priv, ns_type);
if (IS_ERR(ft)) {
err = PTR_ERR(ft);
@@ -231,10 +276,111 @@ mlx5e_post_meter_rate_create(struct mlx5e_priv *priv,
return err;
}
+static int
+mlx5e_post_meter_create_mtu_table(struct mlx5e_priv *priv,
+ enum mlx5_flow_namespace_type ns_type,
+ struct mlx5e_post_meter_mtu_table *table)
+{
+ int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
+ struct mlx5_flow_group *fg;
+ u32 *flow_group_in;
+ int err;
+
+ flow_group_in = kvzalloc(inlen, GFP_KERNEL);
+ if (!flow_group_in)
+ return -ENOMEM;
+
+ table->ft = mlx5e_post_meter_table_create(priv, ns_type);
+ if (IS_ERR(table->ft)) {
+ err = PTR_ERR(table->ft);
+ goto err_ft;
+ }
+
+ /* create miss group */
+ memset(flow_group_in, 0, inlen);
+ MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, 1);
+ MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, 1);
+ fg = mlx5_create_flow_group(table->ft, flow_group_in);
+ if (IS_ERR(fg)) {
+ err = PTR_ERR(fg);
+ goto err_miss_grp;
+ }
+ table->fg = fg;
+
+ kvfree(flow_group_in);
+ return 0;
+
+err_miss_grp:
+ mlx5_destroy_flow_table(table->ft);
+err_ft:
+ kvfree(flow_group_in);
+ return err;
+}
+
+static int
+mlx5e_post_meter_mtu_create(struct mlx5e_priv *priv,
+ enum mlx5_flow_namespace_type ns_type,
+ struct mlx5e_post_act *post_act,
+ struct mlx5_fc *act_counter,
+ struct mlx5_fc *drop_counter,
+ struct mlx5e_post_meter_priv *post_meter,
+ struct mlx5_flow_attr *green_attr,
+ struct mlx5_flow_attr *red_attr)
+{
+ struct mlx5e_post_meter_mtu_tables *mtu_tables = &post_meter->mtu_tables;
+ static struct mlx5_flow_spec zero_spec = {};
+ struct mlx5_flow_handle *rule;
+ int err;
+
+ post_meter->type = MLX5E_POST_METER_MTU;
+
+ err = mlx5e_post_meter_create_mtu_table(priv, ns_type, &mtu_tables->green_table);
+ if (err)
+ goto err_green_ft;
+
+ green_attr->ft = mtu_tables->green_table.ft;
+ rule = mlx5e_post_meter_add_rule(priv, post_meter, &zero_spec, green_attr,
+ act_counter, drop_counter);
+ if (IS_ERR(rule)) {
+ mlx5_core_warn(priv->mdev, "Failed to create post_meter conform rule\n");
+ err = PTR_ERR(rule);
+ goto err_green_rule;
+ }
+ mtu_tables->green_table.rule = rule;
+ mtu_tables->green_table.attr = green_attr;
+
+ err = mlx5e_post_meter_create_mtu_table(priv, ns_type, &mtu_tables->red_table);
+ if (err)
+ goto err_red_ft;
+
+ red_attr->ft = mtu_tables->red_table.ft;
+ rule = mlx5e_post_meter_add_rule(priv, post_meter, &zero_spec, red_attr,
+ act_counter, drop_counter);
+ if (IS_ERR(rule)) {
+ mlx5_core_warn(priv->mdev, "Failed to create post_meter exceed rule\n");
+ err = PTR_ERR(rule);
+ goto err_red_rule;
+ }
+ mtu_tables->red_table.rule = rule;
+ mtu_tables->red_table.attr = red_attr;
+
+ return 0;
+
+err_red_rule:
+ mlx5_destroy_flow_table(mtu_tables->red_table.ft);
+err_red_ft:
+ mlx5_del_flow_rules(mtu_tables->green_table.rule);
+err_green_rule:
+ mlx5_destroy_flow_table(mtu_tables->green_table.ft);
+err_green_ft:
+ return err;
+}
+
struct mlx5e_post_meter_priv *
mlx5e_post_meter_init(struct mlx5e_priv *priv,
enum mlx5_flow_namespace_type ns_type,
struct mlx5e_post_act *post_act,
+ enum mlx5e_post_meter_type type,
struct mlx5_fc *act_counter,
struct mlx5_fc *drop_counter,
struct mlx5_flow_attr *branch_true,
@@ -247,9 +393,21 @@ mlx5e_post_meter_init(struct mlx5e_priv *priv,
if (!post_meter)
return ERR_PTR(-ENOMEM);
- err = mlx5e_post_meter_rate_create(priv, ns_type, post_act,
- act_counter, drop_counter, post_meter,
- branch_true, branch_false);
+ switch (type) {
+ case MLX5E_POST_METER_MTU:
+ err = mlx5e_post_meter_mtu_create(priv, ns_type, post_act,
+ act_counter, drop_counter, post_meter,
+ branch_true, branch_false);
+ break;
+ case MLX5E_POST_METER_RATE:
+ err = mlx5e_post_meter_rate_create(priv, ns_type, post_act,
+ act_counter, drop_counter, post_meter,
+ branch_true, branch_false);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ }
+
if (err)
goto err;
@@ -268,10 +426,22 @@ mlx5e_post_meter_rate_destroy(struct mlx5_eswitch *esw, struct mlx5e_post_meter_
mlx5e_post_meter_rate_table_destroy(post_meter);
}
+static void
+mlx5e_post_meter_mtu_destroy(struct mlx5e_post_meter_priv *post_meter)
+{
+ mlx5e_post_meter_mtu_rules_destroy(post_meter);
+ mlx5e_post_meter_mtu_fg_destroy(post_meter);
+ mlx5e_post_meter_mtu_table_destroy(post_meter);
+}
+
void
mlx5e_post_meter_cleanup(struct mlx5_eswitch *esw, struct mlx5e_post_meter_priv *post_meter)
{
- mlx5e_post_meter_rate_destroy(esw, post_meter);
+ if (post_meter->type == MLX5E_POST_METER_RATE)
+ mlx5e_post_meter_rate_destroy(esw, post_meter);
+ else
+ mlx5e_post_meter_mtu_destroy(post_meter);
+
kfree(post_meter);
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.h b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.h
index a4075d33fde2..0a3dbf5ed86d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_meter.h
@@ -14,6 +14,11 @@
struct mlx5e_post_meter_priv;
+enum mlx5e_post_meter_type {
+ MLX5E_POST_METER_RATE = 0,
+ MLX5E_POST_METER_MTU
+};
+
struct mlx5_flow_table *
mlx5e_post_meter_get_ft(struct mlx5e_post_meter_priv *post_meter);
@@ -21,10 +26,12 @@ struct mlx5e_post_meter_priv *
mlx5e_post_meter_init(struct mlx5e_priv *priv,
enum mlx5_flow_namespace_type ns_type,
struct mlx5e_post_act *post_act,
+ enum mlx5e_post_meter_type type,
struct mlx5_fc *act_counter,
struct mlx5_fc *drop_counter,
struct mlx5_flow_attr *branch_true,
struct mlx5_flow_attr *branch_false);
+
void
mlx5e_post_meter_cleanup(struct mlx5_eswitch *esw, struct mlx5e_post_meter_priv *post_meter);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 227fa6ef9e41..f66a2546003e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -423,6 +423,7 @@ mlx5e_tc_add_flow_meter(struct mlx5e_priv *priv,
ns_type = mlx5e_tc_meter_get_namespace(meter->flow_meters);
post_meter = mlx5e_post_meter_init(priv, ns_type, post_act,
+ MLX5E_POST_METER_RATE,
meter->act_counter, meter->drop_counter,
attr->branch_true, attr->branch_false);
if (IS_ERR(post_meter)) {
--
2.38.1
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