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net/mlx5e: Add goto to tc action infra

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Add parsing support by implementing struct mlx5e_tc_act
for this action.

Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Roi Dayan 2021-07-21 10:26:41 +03:00 committed by Saeed Mahameed
parent fad5479069
commit 67d62ee7f4
7 changed files with 99 additions and 76 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/Makefile
View File

@ -48,7 +48,7 @@ mlx5_core-$(CONFIG_MLX5_CLS_ACT) += en_tc.o en/rep/tc.o en/rep/neigh.o \
en/tc/post_act.o en/tc/int_port.o
mlx5_core-$(CONFIG_MLX5_CLS_ACT) += en/tc/act/act.o en/tc/act/drop.o en/tc/act/trap.o \
en/tc/act/accept.o en/tc/act/mark.o
en/tc/act/accept.o en/tc/act/mark.o en/tc/act/goto.o
mlx5_core-$(CONFIG_MLX5_TC_CT) += en/tc_ct.o
mlx5_core-$(CONFIG_MLX5_TC_SAMPLE) += en/tc/sample.o

3
drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.c
View File

@ -10,6 +10,7 @@ static struct mlx5e_tc_act *tc_acts_fdb[NUM_FLOW_ACTIONS] = {
&mlx5e_tc_act_accept,
&mlx5e_tc_act_drop,
&mlx5e_tc_act_trap,
&mlx5e_tc_act_goto,
};
/* Must be aligned with enum flow_action_id. */
@ -17,7 +18,7 @@ static struct mlx5e_tc_act *tc_acts_nic[NUM_FLOW_ACTIONS] = {
&mlx5e_tc_act_accept,
&mlx5e_tc_act_drop,
NULL, /* FLOW_ACTION_TRAP, */
NULL, /* FLOW_ACTION_GOTO, */
&mlx5e_tc_act_goto,
NULL, /* FLOW_ACTION_REDIRECT, */
NULL, /* FLOW_ACTION_MIRRED, */
NULL, /* FLOW_ACTION_REDIRECT_INGRESS, */

1
drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.h
View File

@ -31,6 +31,7 @@ extern struct mlx5e_tc_act mlx5e_tc_act_drop;
extern struct mlx5e_tc_act mlx5e_tc_act_trap;
extern struct mlx5e_tc_act mlx5e_tc_act_accept;
extern struct mlx5e_tc_act mlx5e_tc_act_mark;
extern struct mlx5e_tc_act mlx5e_tc_act_goto;
struct mlx5e_tc_act *
mlx5e_tc_act_get(enum flow_action_id act_id,

87
drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/goto.c Normal file
View File

@ -0,0 +1,87 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include "act.h"
#include "en/tc_priv.h"
#include "eswitch.h"
static int
validate_goto_chain(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
const struct flow_action_entry *act,
struct netlink_ext_ack *extack)
{
bool is_esw = mlx5e_is_eswitch_flow(flow);
bool ft_flow = mlx5e_is_ft_flow(flow);
u32 dest_chain = act->chain_index;
struct mlx5_fs_chains *chains;
struct mlx5_eswitch *esw;
u32 reformat_and_fwd;
u32 max_chain;
esw = priv->mdev->priv.eswitch;
chains = is_esw ? esw_chains(esw) : mlx5e_nic_chains(priv);
max_chain = mlx5_chains_get_chain_range(chains);
reformat_and_fwd = is_esw ?
MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_and_fwd_to_table) :
MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, reformat_and_fwd_to_table);
if (ft_flow) {
NL_SET_ERR_MSG_MOD(extack, "Goto action is not supported");
return -EOPNOTSUPP;
}
if (!mlx5_chains_backwards_supported(chains) &&
dest_chain <= flow->attr->chain) {
NL_SET_ERR_MSG_MOD(extack, "Goto lower numbered chain isn't supported");
return -EOPNOTSUPP;
}
if (dest_chain > max_chain) {
NL_SET_ERR_MSG_MOD(extack,
"Requested destination chain is out of supported range");
return -EOPNOTSUPP;
}
if (flow->attr->action & (MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT |
MLX5_FLOW_CONTEXT_ACTION_DECAP) &&
!reformat_and_fwd) {
NL_SET_ERR_MSG_MOD(extack,
"Goto chain is not allowed if action has reformat or decap");
return -EOPNOTSUPP;
}
return 0;
}
static bool
tc_act_can_offload_goto(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
int act_index)
{
struct netlink_ext_ack *extack = parse_state->extack;
struct mlx5e_tc_flow *flow = parse_state->flow;
if (validate_goto_chain(flow->priv, flow, act, extack))
return false;
return true;
}
static int
tc_act_parse_goto(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr)
{
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
attr->dest_chain = act->chain_index;
return 0;
}
struct mlx5e_tc_act mlx5e_tc_act_goto = {
.can_offload = tc_act_can_offload_goto,
.parse_action = tc_act_parse_goto,
};

4
drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h
View File

@ -11,6 +11,8 @@
#define MLX5E_TC_MAX_SPLITS 1
#define mlx5e_nic_chains(priv) ((priv)->fs.tc.chains)
enum {
MLX5E_TC_FLOW_FLAG_INGRESS = MLX5E_TC_FLAG_INGRESS_BIT,
MLX5E_TC_FLOW_FLAG_EGRESS = MLX5E_TC_FLAG_EGRESS_BIT,
@ -117,6 +119,8 @@ mlx5e_tc_offload_fdb_rules(struct mlx5_eswitch *esw,
struct mlx5_flow_spec *spec,
struct mlx5_flow_attr *attr);
bool mlx5e_is_eswitch_flow(struct mlx5e_tc_flow *flow);
bool mlx5e_is_ft_flow(struct mlx5e_tc_flow *flow);
bool mlx5e_is_offloaded_flow(struct mlx5e_tc_flow *flow);
static inline void __flow_flag_set(struct mlx5e_tc_flow *flow, unsigned long flag)

77
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View File

@ -71,8 +71,6 @@
#include "lag/lag.h"
#include "lag/mp.h"
#define nic_chains(priv) ((priv)->fs.tc.chains)
#define MLX5E_TC_TABLE_NUM_GROUPS 4
#define MLX5E_TC_TABLE_MAX_GROUP_SIZE BIT(18)
@ -400,7 +398,7 @@ bool mlx5e_is_eswitch_flow(struct mlx5e_tc_flow *flow)
return flow_flag_test(flow, ESWITCH);
}
static bool mlx5e_is_ft_flow(struct mlx5e_tc_flow *flow)
bool mlx5e_is_ft_flow(struct mlx5e_tc_flow *flow)
{
return flow_flag_test(flow, FT);
}
@ -938,7 +936,7 @@ mlx5e_add_offloaded_nic_rule(struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr)
{
struct mlx5_flow_context *flow_context = &spec->flow_context;
struct mlx5_fs_chains *nic_chains = nic_chains(priv);
struct mlx5_fs_chains *nic_chains = mlx5e_nic_chains(priv);
struct mlx5_nic_flow_attr *nic_attr = attr->nic_attr;
struct mlx5e_tc_table *tc = &priv->fs.tc;
struct mlx5_flow_destination dest[2] = {};
@ -1092,7 +1090,7 @@ void mlx5e_del_offloaded_nic_rule(struct mlx5e_priv *priv,
struct mlx5_flow_handle *rule,
struct mlx5_flow_attr *attr)
{
struct mlx5_fs_chains *nic_chains = nic_chains(priv);
struct mlx5_fs_chains *nic_chains = mlx5e_nic_chains(priv);
mlx5_del_flow_rules(rule);
@ -1124,7 +1122,7 @@ static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
mutex_lock(&priv->fs.tc.t_lock);
if (!mlx5e_tc_num_filters(priv, MLX5_TC_FLAG(NIC_OFFLOAD)) &&
!IS_ERR_OR_NULL(tc->t)) {
mlx5_chains_put_table(nic_chains(priv), 0, 1, MLX5E_TC_FT_LEVEL);
mlx5_chains_put_table(mlx5e_nic_chains(priv), 0, 1, MLX5E_TC_FT_LEVEL);
priv->fs.tc.t = NULL;
}
mutex_unlock(&priv->fs.tc.t_lock);
@ -3357,55 +3355,6 @@ add_vlan_prio_tag_rewrite_action(struct mlx5e_priv *priv,
extack);
}
static int validate_goto_chain(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
const struct flow_action_entry *act,
struct netlink_ext_ack *extack)
{
bool is_esw = mlx5e_is_eswitch_flow(flow);
bool ft_flow = mlx5e_is_ft_flow(flow);
u32 dest_chain = act->chain_index;
struct mlx5_fs_chains *chains;
struct mlx5_eswitch *esw;
u32 reformat_and_fwd;
u32 max_chain;
esw = priv->mdev->priv.eswitch;
chains = is_esw ? esw_chains(esw) : nic_chains(priv);
max_chain = mlx5_chains_get_chain_range(chains);
reformat_and_fwd = is_esw ?
MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_and_fwd_to_table) :
MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, reformat_and_fwd_to_table);
if (ft_flow) {
NL_SET_ERR_MSG_MOD(extack, "Goto action is not supported");
return -EOPNOTSUPP;
}
if (!mlx5_chains_backwards_supported(chains) &&
dest_chain <= flow->attr->chain) {
NL_SET_ERR_MSG_MOD(extack,
"Goto lower numbered chain isn't supported");
return -EOPNOTSUPP;
}
if (dest_chain > max_chain) {
NL_SET_ERR_MSG_MOD(extack,
"Requested destination chain is out of supported range");
return -EOPNOTSUPP;
}
if (flow->attr->action & (MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT |
MLX5_FLOW_CONTEXT_ACTION_DECAP) &&
!reformat_and_fwd) {
NL_SET_ERR_MSG_MOD(extack,
"Goto chain is not allowed if action has reformat or decap");
return -EOPNOTSUPP;
}
return 0;
}
static int
actions_prepare_mod_hdr_actions(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
@ -3533,15 +3482,6 @@ parse_tc_nic_actions(struct mlx5e_priv *priv,
}
}
break;
case FLOW_ACTION_GOTO:
err = validate_goto_chain(priv, flow, act, extack);
if (err)
return err;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
attr->dest_chain = act->chain_index;
break;
case FLOW_ACTION_CT:
err = mlx5_tc_ct_parse_action(get_ct_priv(priv), attr,
&parse_attr->mod_hdr_acts,
@ -4184,15 +4124,6 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
case FLOW_ACTION_TUNNEL_DECAP:
decap = true;
break;
case FLOW_ACTION_GOTO:
err = validate_goto_chain(priv, flow, act, extack);
if (err)
return err;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
attr->dest_chain = act->chain_index;
break;
case FLOW_ACTION_CT:
if (flow_flag_test(flow, SAMPLE)) {
NL_SET_ERR_MSG_MOD(extack, "Sample action with connection tracking is not supported");

1
drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
View File

@ -151,7 +151,6 @@ enum {
int mlx5e_tc_esw_init(struct rhashtable *tc_ht);
void mlx5e_tc_esw_cleanup(struct rhashtable *tc_ht);
bool mlx5e_is_eswitch_flow(struct mlx5e_tc_flow *flow);
int mlx5e_configure_flower(struct net_device *dev, struct mlx5e_priv *priv,
struct flow_cls_offload *f, unsigned long flags);