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net/mlx5e: CT: Re-use tuple modify headers for identical modify actions

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After removing the tupleid register which changed per tuple,
tuple modify headers set the ct_state, zone, mark, and label registers.
For non-natted tuples going through the same tc rules path, their values
will be the same, and all their modify headers will be the same.

Re-use tuple modify header when possible, by adding each new modify
header to an hahstable, and looking up identical ones before creating
a new one.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Paul Blakey 2020-02-18 10:24:07 +02:00 committed by Saeed Mahameed
parent b2fdf3d047
commit 6702d39355
1 changed files with 15 additions and 10 deletions
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25
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
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@ -16,6 +16,7 @@
#include "esw/chains.h"
#include "en/tc_ct.h"
#include "en/mod_hdr.h"
#include "en.h"
#include "en_tc.h"
#include "en_rep.h"
@ -59,6 +60,7 @@ struct mlx5_ct_flow {
struct mlx5_ct_zone_rule {
struct mlx5_flow_handle *rule;
struct mlx5e_mod_hdr_handle *mh;
struct mlx5_esw_flow_attr attr;
bool nat;
};
@ -397,7 +399,8 @@ mlx5_tc_ct_entry_del_rule(struct mlx5_tc_ct_priv *ct_priv,
ct_dbg("Deleting ct entry rule in zone %d", entry->tuple.zone);
mlx5_eswitch_del_offloaded_rule(esw, zone_rule->rule, attr);
mlx5_modify_header_dealloc(esw->dev, attr->modify_hdr);
mlx5e_mod_hdr_detach(ct_priv->esw->dev,
&esw->offloads.mod_hdr, zone_rule->mh);
}
static void
@ -579,11 +582,10 @@ static int
mlx5_tc_ct_entry_create_mod_hdr(struct mlx5_tc_ct_priv *ct_priv,
struct mlx5_esw_flow_attr *attr,
struct flow_rule *flow_rule,
struct mlx5e_mod_hdr_handle **mh,
u16 zone, bool nat)
{
struct mlx5e_tc_mod_hdr_acts mod_acts = {};
struct mlx5_eswitch *esw = ct_priv->esw;
struct mlx5_modify_hdr *mod_hdr;
struct flow_action_entry *meta;
u16 ct_state = 0;
int err;
@ -617,14 +619,15 @@ mlx5_tc_ct_entry_create_mod_hdr(struct mlx5_tc_ct_priv *ct_priv,
if (err)
goto err_mapping;
mod_hdr = mlx5_modify_header_alloc(esw->dev, MLX5_FLOW_NAMESPACE_FDB,
mod_acts.num_actions,
mod_acts.actions);
if (IS_ERR(mod_hdr)) {
err = PTR_ERR(mod_hdr);
*mh = mlx5e_mod_hdr_attach(ct_priv->esw->dev,
&ct_priv->esw->offloads.mod_hdr,
MLX5_FLOW_NAMESPACE_FDB,
&mod_acts);
if (IS_ERR(*mh)) {
err = PTR_ERR(*mh);
goto err_mapping;
}
attr->modify_hdr = mod_hdr;
attr->modify_hdr = mlx5e_mod_hdr_get(*mh);
dealloc_mod_hdr_actions(&mod_acts);
return 0;
@ -653,6 +656,7 @@ mlx5_tc_ct_entry_add_rule(struct mlx5_tc_ct_priv *ct_priv,
return -ENOMEM;
err = mlx5_tc_ct_entry_create_mod_hdr(ct_priv, attr, flow_rule,
&zone_rule->mh,
entry->tuple.zone, nat);
if (err) {
ct_dbg("Failed to create ct entry mod hdr");
@ -687,7 +691,8 @@ mlx5_tc_ct_entry_add_rule(struct mlx5_tc_ct_priv *ct_priv,
return 0;
err_rule:
mlx5_modify_header_dealloc(esw->dev, attr->modify_hdr);
mlx5e_mod_hdr_detach(ct_priv->esw->dev,
&esw->offloads.mod_hdr, zone_rule->mh);
err_mod_hdr:
kfree(spec);
return err;