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net/mlx5e: Add post act offload/unoffload API

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Introduce mlx5e_tc_post_act_offload() and mlx5e_tc_post_act_unoffload()
to be able to unoffload and reoffload existing post action rules handles.
For example in neigh update events, the driver removes and readds rules in
hardware.

Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Roi Dayan
2021-10-14 11:31:51 +03:00
committed by Saeed Mahameed
parent 0610f8dc03
commit 314e110583
2 changed files with 54 additions and 21 deletions
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67
drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_act.c
View File

@ -75,21 +75,47 @@ mlx5e_tc_post_act_destroy(struct mlx5e_post_act *post_act)
kfree(post_act);
}
int
mlx5e_tc_post_act_offload(struct mlx5e_post_act *post_act,
struct mlx5e_post_act_handle *handle)
{
struct mlx5_flow_spec *spec;
int err;
spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
if (!spec)
return -ENOMEM;
/* Post action rule matches on fte_id and executes original rule's tc rule action */
mlx5e_tc_match_to_reg_match(spec, FTEID_TO_REG, handle->id, MLX5_POST_ACTION_MASK);
handle->rule = mlx5_tc_rule_insert(post_act->priv, spec, handle->attr);
if (IS_ERR(handle->rule)) {
err = PTR_ERR(handle->rule);
netdev_warn(post_act->priv->netdev, "Failed to add post action rule");
goto err_rule;
}
kvfree(spec);
return 0;
err_rule:
kvfree(spec);
return err;
}
struct mlx5e_post_act_handle *
mlx5e_tc_post_act_add(struct mlx5e_post_act *post_act, struct mlx5_flow_attr *attr)
{
u32 attr_sz = ns_to_attr_sz(post_act->ns_type);
struct mlx5e_post_act_handle *handle = NULL;
struct mlx5_flow_attr *post_attr = NULL;
struct mlx5_flow_spec *spec = NULL;
struct mlx5e_post_act_handle *handle;
struct mlx5_flow_attr *post_attr;
int err;
handle = kzalloc(sizeof(*handle), GFP_KERNEL);
spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
post_attr = mlx5_alloc_flow_attr(post_act->ns_type);
if (!handle || !spec || !post_attr) {
if (!handle || !post_attr) {
kfree(post_attr);
kvfree(spec);
kfree(handle);
return ERR_PTR(-ENOMEM);
}
@ -113,36 +139,35 @@ mlx5e_tc_post_act_add(struct mlx5e_post_act *post_act, struct mlx5_flow_attr *at
if (err)
goto err_xarray;
/* Post action rule matches on fte_id and executes original rule's
* tc rule action
*/
mlx5e_tc_match_to_reg_match(spec, FTEID_TO_REG,
handle->id, MLX5_POST_ACTION_MASK);
handle->rule = mlx5_tc_rule_insert(post_act->priv, spec, post_attr);
if (IS_ERR(handle->rule)) {
err = PTR_ERR(handle->rule);
netdev_warn(post_act->priv->netdev, "Failed to add post action rule");
goto err_rule;
}
handle->attr = post_attr;
err = mlx5e_tc_post_act_offload(post_act, handle);
if (err)
goto err_rule;
kvfree(spec);
return handle;
err_rule:
xa_erase(&post_act->ids, handle->id);
err_xarray:
kfree(post_attr);
kvfree(spec);
kfree(handle);
return ERR_PTR(err);
}
void
mlx5e_tc_post_act_del(struct mlx5e_post_act *post_act, struct mlx5e_post_act_handle *handle)
mlx5e_tc_post_act_unoffload(struct mlx5e_post_act *post_act,
struct mlx5e_post_act_handle *handle)
{
mlx5_tc_rule_delete(post_act->priv, handle->rule, handle->attr);
handle->rule = NULL;
}
void
mlx5e_tc_post_act_del(struct mlx5e_post_act *post_act, struct mlx5e_post_act_handle *handle)
{
if (!IS_ERR_OR_NULL(handle->rule))
mlx5e_tc_post_act_unoffload(post_act, handle);
xa_erase(&post_act->ids, handle->id);
kfree(handle->attr);
kfree(handle);

8
drivers/net/ethernet/mellanox/mlx5/core/en/tc/post_act.h
View File

@ -24,6 +24,14 @@ mlx5e_tc_post_act_add(struct mlx5e_post_act *post_act, struct mlx5_flow_attr *at
void
mlx5e_tc_post_act_del(struct mlx5e_post_act *post_act, struct mlx5e_post_act_handle *handle);
int
mlx5e_tc_post_act_offload(struct mlx5e_post_act *post_act,
struct mlx5e_post_act_handle *handle);
void
mlx5e_tc_post_act_unoffload(struct mlx5e_post_act *post_act,
struct mlx5e_post_act_handle *handle);
struct mlx5_flow_table *
mlx5e_tc_post_act_get_ft(struct mlx5e_post_act *post_act);