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net/mlx5e: Add offloading of NIC TC pedit (header re-write) actions 

This includes calling the parsing code that translates from pedit
speak to the HW API, allocation (deallocation) of a modify header
context and setting the modify header id associated with this
context to the FTE of that flow.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Or Gerlitz 2017-01-25 19:31:33 +02:00 committed by Saeed Mahameed
parent d79b6df6b1
commit 2f4fe4cab0
1 changed files with 35 additions and 0 deletions
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35
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -52,6 +52,7 @@
struct mlx5_nic_flow_attr {
u32 action;
u32 flow_tag;
u32 mod_hdr_id;
};
enum {
@ -97,10 +98,12 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
.action = attr->action,
.flow_tag = attr->flow_tag,
.encap_id = 0,
.modify_id = attr->mod_hdr_id,
};
struct mlx5_fc *counter = NULL;
struct mlx5_flow_handle *rule;
bool table_created = false;
int err;
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
@ -114,6 +117,18 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
dest.counter = counter;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
err = mlx5_modify_header_alloc(dev, MLX5_FLOW_NAMESPACE_KERNEL,
parse_attr->num_mod_hdr_actions,
parse_attr->mod_hdr_actions,
&attr->mod_hdr_id);
kfree(parse_attr->mod_hdr_actions);
if (err) {
rule = ERR_PTR(err);
goto err_create_mod_hdr_id;
}
}
if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
priv->fs.tc.t =
mlx5_create_auto_grouped_flow_table(priv->fs.ns,
@ -146,6 +161,10 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
priv->fs.tc.t = NULL;
}
err_create_ft:
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5_modify_header_dealloc(priv->mdev,
attr->mod_hdr_id);
err_create_mod_hdr_id:
mlx5_fc_destroy(dev, counter);
return rule;
@ -164,6 +183,10 @@ static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
if (flow->nic_attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5_modify_header_dealloc(priv->mdev,
flow->nic_attr->mod_hdr_id);
}
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
@ -955,6 +978,7 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
struct mlx5_nic_flow_attr *attr = flow->nic_attr;
const struct tc_action *a;
LIST_HEAD(actions);
int err;
if (tc_no_actions(exts))
return -EINVAL;
@ -976,6 +1000,17 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
continue;
}
if (is_tcf_pedit(a)) {
err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_KERNEL,
parse_attr);
if (err)
return err;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
continue;
}
if (is_tcf_skbedit_mark(a)) {
u32 mark = tcf_skbedit_mark(a);