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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2020 Mellanox Technologies Inc. All rights reserved. */
#include "mlx5_core.h"
#include "eswitch.h"
#include "helper.h"
#include "ofld.h"
static bool
esw_acl_ingress_prio_tag_enabled(const struct mlx5_eswitch *esw,
const struct mlx5_vport *vport)
{
return (MLX5_CAP_GEN(esw->dev, prio_tag_required) &&
mlx5_eswitch_is_vf_vport(esw, vport->vport));
}
static int esw_acl_ingress_prio_tag_create(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
struct mlx5_flow_act flow_act = {};
struct mlx5_flow_spec *spec;
int err = 0;
/* For prio tag mode, there is only 1 FTEs:
* 1) Untagged packets - push prio tag VLAN and modify metadata if
* required, allow
* Unmatched traffic is allowed by default
*/
spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
if (!spec)
return -ENOMEM;
/* Untagged packets - push prio tag VLAN, allow */
MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.cvlan_tag);
MLX5_SET(fte_match_param, spec->match_value, outer_headers.cvlan_tag, 0);
spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
flow_act.action = MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH |
MLX5_FLOW_CONTEXT_ACTION_ALLOW;
flow_act.vlan[0].ethtype = ETH_P_8021Q;
flow_act.vlan[0].vid = 0;
flow_act.vlan[0].prio = 0;
if (vport->ingress.offloads.modify_metadata_rule) {
flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
flow_act.modify_hdr = vport->ingress.offloads.modify_metadata;
}
vport->ingress.allow_rule = mlx5_add_flow_rules(vport->ingress.acl, spec,
&flow_act, NULL, 0);
if (IS_ERR(vport->ingress.allow_rule)) {
err = PTR_ERR(vport->ingress.allow_rule);
esw_warn(esw->dev,
"vport[%d] configure ingress untagged allow rule, err(%d)\n",
vport->vport, err);
vport->ingress.allow_rule = NULL;
}
kvfree(spec);
return err;
}
static int esw_acl_ingress_mod_metadata_create(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
u8 action[MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)] = {};
struct mlx5_flow_act flow_act = {};
int err = 0;
u32 key;
key = mlx5_eswitch_get_vport_metadata_for_match(esw, vport->vport);
key >>= ESW_SOURCE_PORT_METADATA_OFFSET;
MLX5_SET(set_action_in, action, action_type, MLX5_ACTION_TYPE_SET);
MLX5_SET(set_action_in, action, field,
MLX5_ACTION_IN_FIELD_METADATA_REG_C_0);
MLX5_SET(set_action_in, action, data, key);
MLX5_SET(set_action_in, action, offset,
ESW_SOURCE_PORT_METADATA_OFFSET);
MLX5_SET(set_action_in, action, length,
ESW_SOURCE_PORT_METADATA_BITS);
vport->ingress.offloads.modify_metadata =
mlx5_modify_header_alloc(esw->dev, MLX5_FLOW_NAMESPACE_ESW_INGRESS,
1, action);
if (IS_ERR(vport->ingress.offloads.modify_metadata)) {
err = PTR_ERR(vport->ingress.offloads.modify_metadata);
esw_warn(esw->dev,
"failed to alloc modify header for vport %d ingress acl (%d)\n",
vport->vport, err);
return err;
}
flow_act.action = MLX5_FLOW_CONTEXT_ACTION_MOD_HDR | MLX5_FLOW_CONTEXT_ACTION_ALLOW;
flow_act.modify_hdr = vport->ingress.offloads.modify_metadata;
vport->ingress.offloads.modify_metadata_rule =
mlx5_add_flow_rules(vport->ingress.acl,
NULL, &flow_act, NULL, 0);
if (IS_ERR(vport->ingress.offloads.modify_metadata_rule)) {
err = PTR_ERR(vport->ingress.offloads.modify_metadata_rule);
esw_warn(esw->dev,
"failed to add setting metadata rule for vport %d ingress acl, err(%d)\n",
vport->vport, err);
mlx5_modify_header_dealloc(esw->dev, vport->ingress.offloads.modify_metadata);
vport->ingress.offloads.modify_metadata_rule = NULL;
}
return err;
}
static void esw_acl_ingress_mod_metadata_destroy(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
if (!vport->ingress.offloads.modify_metadata_rule)
return;
mlx5_del_flow_rules(vport->ingress.offloads.modify_metadata_rule);
mlx5_modify_header_dealloc(esw->dev, vport->ingress.offloads.modify_metadata);
vport->ingress.offloads.modify_metadata_rule = NULL;
}
static int esw_acl_ingress_ofld_rules_create(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
int err;
if (mlx5_eswitch_vport_match_metadata_enabled(esw)) {
err = esw_acl_ingress_mod_metadata_create(esw, vport);
if (err) {
esw_warn(esw->dev,
"vport(%d) create ingress modify metadata, err(%d)\n",
vport->vport, err);
return err;
}
}
if (esw_acl_ingress_prio_tag_enabled(esw, vport)) {
err = esw_acl_ingress_prio_tag_create(esw, vport);
if (err) {
esw_warn(esw->dev,
"vport(%d) create ingress prio tag rule, err(%d)\n",
vport->vport, err);
goto prio_tag_err;
}
}
return 0;
prio_tag_err:
esw_acl_ingress_mod_metadata_destroy(esw, vport);
return err;
}
static void esw_acl_ingress_ofld_rules_destroy(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
esw_acl_ingress_allow_rule_destroy(vport);
esw_acl_ingress_mod_metadata_destroy(esw, vport);
}
static int esw_acl_ingress_ofld_groups_create(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
struct mlx5_flow_group *g;
void *match_criteria;
u32 *flow_group_in;
u32 flow_index = 0;
int ret = 0;
flow_group_in = kvzalloc(inlen, GFP_KERNEL);
if (!flow_group_in)
return -ENOMEM;
if (esw_acl_ingress_prio_tag_enabled(esw, vport)) {
/* This group is to hold FTE to match untagged packets when prio_tag
* is enabled.
*/
match_criteria = MLX5_ADDR_OF(create_flow_group_in,
flow_group_in, match_criteria);
MLX5_SET(create_flow_group_in, flow_group_in,
match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
MLX5_SET_TO_ONES(fte_match_param, match_criteria, outer_headers.cvlan_tag);
MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, flow_index);
MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, flow_index);
g = mlx5_create_flow_group(vport->ingress.acl, flow_group_in);
if (IS_ERR(g)) {
ret = PTR_ERR(g);
esw_warn(esw->dev, "vport[%d] ingress create untagged flow group, err(%d)\n",
vport->vport, ret);
goto prio_tag_err;
}
vport->ingress.offloads.metadata_prio_tag_grp = g;
flow_index++;
}
if (mlx5_eswitch_vport_match_metadata_enabled(esw)) {
/* This group holds an FTE with no match to add metadata for
* tagged packets if prio-tag is enabled, or for all untagged
* traffic in case prio-tag is disabled.
*/
memset(flow_group_in, 0, inlen);
MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, flow_index);
MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, flow_index);
g = mlx5_create_flow_group(vport->ingress.acl, flow_group_in);
if (IS_ERR(g)) {
ret = PTR_ERR(g);
esw_warn(esw->dev, "vport[%d] ingress create drop flow group, err(%d)\n",
vport->vport, ret);
goto metadata_err;
}
vport->ingress.offloads.metadata_allmatch_grp = g;
}
kvfree(flow_group_in);
return 0;
metadata_err:
if (!IS_ERR_OR_NULL(vport->ingress.offloads.metadata_prio_tag_grp)) {
mlx5_destroy_flow_group(vport->ingress.offloads.metadata_prio_tag_grp);
vport->ingress.offloads.metadata_prio_tag_grp = NULL;
}
prio_tag_err:
kvfree(flow_group_in);
return ret;
}
static void esw_acl_ingress_ofld_groups_destroy(struct mlx5_vport *vport)
{
if (vport->ingress.offloads.metadata_allmatch_grp) {
mlx5_destroy_flow_group(vport->ingress.offloads.metadata_allmatch_grp);
vport->ingress.offloads.metadata_allmatch_grp = NULL;
}
if (vport->ingress.offloads.metadata_prio_tag_grp) {
mlx5_destroy_flow_group(vport->ingress.offloads.metadata_prio_tag_grp);
vport->ingress.offloads.metadata_prio_tag_grp = NULL;
}
}
int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
int num_ftes = 0;
int err;
if (!mlx5_eswitch_vport_match_metadata_enabled(esw) &&
!esw_acl_ingress_prio_tag_enabled(esw, vport))
return 0;
esw_acl_ingress_allow_rule_destroy(vport);
if (mlx5_eswitch_vport_match_metadata_enabled(esw))
num_ftes++;
if (esw_acl_ingress_prio_tag_enabled(esw, vport))
num_ftes++;
vport->ingress.acl = esw_acl_table_create(esw, vport->vport,
MLX5_FLOW_NAMESPACE_ESW_INGRESS,
num_ftes);
if (IS_ERR_OR_NULL(vport->ingress.acl)) {
err = PTR_ERR(vport->ingress.acl);
vport->ingress.acl = NULL;
return err;
}
err = esw_acl_ingress_ofld_groups_create(esw, vport);
if (err)
goto group_err;
esw_debug(esw->dev,
"vport[%d] configure ingress rules\n", vport->vport);
err = esw_acl_ingress_ofld_rules_create(esw, vport);
if (err)
goto rules_err;
return 0;
rules_err:
esw_acl_ingress_ofld_groups_destroy(vport);
group_err:
esw_acl_ingress_table_destroy(vport);
return err;
}
void esw_acl_ingress_ofld_cleanup(struct mlx5_eswitch *esw,
struct mlx5_vport *vport)
{
esw_acl_ingress_ofld_rules_destroy(esw, vport);
esw_acl_ingress_ofld_groups_destroy(vport);
esw_acl_ingress_table_destroy(vport);
}
/* Caller must hold rtnl_lock */
int mlx5_esw_acl_ingress_vport_bond_update(struct mlx5_eswitch *esw, u16 vport_num,
u32 metadata)
{
struct mlx5_vport *vport = mlx5_eswitch_get_vport(esw, vport_num);
int err;
if (WARN_ON_ONCE(IS_ERR(vport))) {
esw_warn(esw->dev, "vport(%d) invalid!\n", vport_num);
err = PTR_ERR(vport);
goto out;
}
esw_acl_ingress_ofld_rules_destroy(esw, vport);
vport->metadata = metadata ? metadata : vport->default_metadata;
/* Recreate ingress acl rules with vport->metadata */
err = esw_acl_ingress_ofld_rules_create(esw, vport);
if (err)
goto out;
return 0;
out:
vport->metadata = vport->default_metadata;
return err;
}
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