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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#include "bridge.h"
#include "eswitch.h"
#include "bridge_priv.h"
static struct mlx5_flow_group *
mlx5_esw_bridge_ingress_igmp_fg_create(struct mlx5_eswitch *esw,
struct mlx5_flow_table *ingress_ft)
{
int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
struct mlx5_flow_group *fg;
u32 *in, *match;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return ERR_PTR(-ENOMEM);
MLX5_SET(create_flow_group_in, in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
match = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
MLX5_SET_TO_ONES(fte_match_param, match, outer_headers.ip_version);
MLX5_SET_TO_ONES(fte_match_param, match, outer_headers.ip_protocol);
MLX5_SET(create_flow_group_in, in, start_flow_index,
MLX5_ESW_BRIDGE_INGRESS_TABLE_IGMP_GRP_IDX_FROM);
MLX5_SET(create_flow_group_in, in, end_flow_index,
MLX5_ESW_BRIDGE_INGRESS_TABLE_IGMP_GRP_IDX_TO);
fg = mlx5_create_flow_group(ingress_ft, in);
kvfree(in);
if (IS_ERR(fg))
esw_warn(esw->dev,
"Failed to create IGMP flow group for bridge ingress table (err=%pe)\n",
fg);
return fg;
}
static struct mlx5_flow_group *
mlx5_esw_bridge_ingress_mld_fg_create(struct mlx5_eswitch *esw,
struct mlx5_flow_table *ingress_ft)
{
int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
struct mlx5_flow_group *fg;
u32 *in, *match;
if (!(MLX5_CAP_GEN(esw->dev, flex_parser_protocols) & MLX5_FLEX_PROTO_ICMPV6)) {
esw_warn(esw->dev,
"Can't create MLD flow group due to missing hardware ICMPv6 parsing support\n");
return NULL;
}
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return ERR_PTR(-ENOMEM);
MLX5_SET(create_flow_group_in, in, match_criteria_enable,
MLX5_MATCH_OUTER_HEADERS | MLX5_MATCH_MISC_PARAMETERS_3);
match = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
MLX5_SET_TO_ONES(fte_match_param, match, outer_headers.ip_version);
MLX5_SET_TO_ONES(fte_match_param, match, misc_parameters_3.icmpv6_type);
MLX5_SET(create_flow_group_in, in, start_flow_index,
MLX5_ESW_BRIDGE_INGRESS_TABLE_MLD_GRP_IDX_FROM);
MLX5_SET(create_flow_group_in, in, end_flow_index,
MLX5_ESW_BRIDGE_INGRESS_TABLE_MLD_GRP_IDX_TO);
fg = mlx5_create_flow_group(ingress_ft, in);
kvfree(in);
if (IS_ERR(fg))
esw_warn(esw->dev,
"Failed to create MLD flow group for bridge ingress table (err=%pe)\n",
fg);
return fg;
}
static int
mlx5_esw_bridge_ingress_mcast_fgs_init(struct mlx5_esw_bridge_offloads *br_offloads)
{
struct mlx5_flow_table *ingress_ft = br_offloads->ingress_ft;
struct mlx5_eswitch *esw = br_offloads->esw;
struct mlx5_flow_group *igmp_fg, *mld_fg;
igmp_fg = mlx5_esw_bridge_ingress_igmp_fg_create(esw, ingress_ft);
if (IS_ERR(igmp_fg))
return PTR_ERR(igmp_fg);
mld_fg = mlx5_esw_bridge_ingress_mld_fg_create(esw, ingress_ft);
if (IS_ERR(mld_fg)) {
mlx5_destroy_flow_group(igmp_fg);
return PTR_ERR(mld_fg);
}
br_offloads->ingress_igmp_fg = igmp_fg;
br_offloads->ingress_mld_fg = mld_fg;
return 0;
}
static void
mlx5_esw_bridge_ingress_mcast_fgs_cleanup(struct mlx5_esw_bridge_offloads *br_offloads)
{
if (br_offloads->ingress_mld_fg)
mlx5_destroy_flow_group(br_offloads->ingress_mld_fg);
br_offloads->ingress_mld_fg = NULL;
if (br_offloads->ingress_igmp_fg)
mlx5_destroy_flow_group(br_offloads->ingress_igmp_fg);
br_offloads->ingress_igmp_fg = NULL;
}
static struct mlx5_flow_handle *
mlx5_esw_bridge_ingress_igmp_fh_create(struct mlx5_flow_table *ingress_ft,
struct mlx5_flow_table *skip_ft)
{
struct mlx5_flow_destination dest = {
.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
.ft = skip_ft,
};
struct mlx5_flow_act flow_act = {
.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
.flags = FLOW_ACT_NO_APPEND,
};
struct mlx5_flow_spec *rule_spec;
struct mlx5_flow_handle *handle;
rule_spec = kvzalloc(sizeof(*rule_spec), GFP_KERNEL);
if (!rule_spec)
return ERR_PTR(-ENOMEM);
rule_spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
MLX5_SET_TO_ONES(fte_match_param, rule_spec->match_criteria, outer_headers.ip_version);
MLX5_SET(fte_match_param, rule_spec->match_value, outer_headers.ip_version, 4);
MLX5_SET_TO_ONES(fte_match_param, rule_spec->match_criteria, outer_headers.ip_protocol);
MLX5_SET(fte_match_param, rule_spec->match_value, outer_headers.ip_protocol, IPPROTO_IGMP);
handle = mlx5_add_flow_rules(ingress_ft, rule_spec, &flow_act, &dest, 1);
kvfree(rule_spec);
return handle;
}
static struct mlx5_flow_handle *
mlx5_esw_bridge_ingress_mld_fh_create(u8 type, struct mlx5_flow_table *ingress_ft,
struct mlx5_flow_table *skip_ft)
{
struct mlx5_flow_destination dest = {
.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
.ft = skip_ft,
};
struct mlx5_flow_act flow_act = {
.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
.flags = FLOW_ACT_NO_APPEND,
};
struct mlx5_flow_spec *rule_spec;
struct mlx5_flow_handle *handle;
rule_spec = kvzalloc(sizeof(*rule_spec), GFP_KERNEL);
if (!rule_spec)
return ERR_PTR(-ENOMEM);
rule_spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS | MLX5_MATCH_MISC_PARAMETERS_3;
MLX5_SET_TO_ONES(fte_match_param, rule_spec->match_criteria, outer_headers.ip_version);
MLX5_SET(fte_match_param, rule_spec->match_value, outer_headers.ip_version, 6);
MLX5_SET_TO_ONES(fte_match_param, rule_spec->match_criteria, misc_parameters_3.icmpv6_type);
MLX5_SET(fte_match_param, rule_spec->match_value, misc_parameters_3.icmpv6_type, type);
handle = mlx5_add_flow_rules(ingress_ft, rule_spec, &flow_act, &dest, 1);
kvfree(rule_spec);
return handle;
}
static int
mlx5_esw_bridge_ingress_mcast_fhs_create(struct mlx5_esw_bridge_offloads *br_offloads)
{
struct mlx5_flow_handle *igmp_handle, *mld_query_handle, *mld_report_handle,
*mld_done_handle;
struct mlx5_flow_table *ingress_ft = br_offloads->ingress_ft,
*skip_ft = br_offloads->skip_ft;
int err;
igmp_handle = mlx5_esw_bridge_ingress_igmp_fh_create(ingress_ft, skip_ft);
if (IS_ERR(igmp_handle))
return PTR_ERR(igmp_handle);
if (br_offloads->ingress_mld_fg) {
mld_query_handle = mlx5_esw_bridge_ingress_mld_fh_create(ICMPV6_MGM_QUERY,
ingress_ft,
skip_ft);
if (IS_ERR(mld_query_handle)) {
err = PTR_ERR(mld_query_handle);
goto err_mld_query;
}
mld_report_handle = mlx5_esw_bridge_ingress_mld_fh_create(ICMPV6_MGM_REPORT,
ingress_ft,
skip_ft);
if (IS_ERR(mld_report_handle)) {
err = PTR_ERR(mld_report_handle);
goto err_mld_report;
}
mld_done_handle = mlx5_esw_bridge_ingress_mld_fh_create(ICMPV6_MGM_REDUCTION,
ingress_ft,
skip_ft);
if (IS_ERR(mld_done_handle)) {
err = PTR_ERR(mld_done_handle);
goto err_mld_done;
}
} else {
mld_query_handle = NULL;
mld_report_handle = NULL;
mld_done_handle = NULL;
}
br_offloads->igmp_handle = igmp_handle;
br_offloads->mld_query_handle = mld_query_handle;
br_offloads->mld_report_handle = mld_report_handle;
br_offloads->mld_done_handle = mld_done_handle;
return 0;
err_mld_done:
mlx5_del_flow_rules(mld_report_handle);
err_mld_report:
mlx5_del_flow_rules(mld_query_handle);
err_mld_query:
mlx5_del_flow_rules(igmp_handle);
return err;
}
static void
mlx5_esw_bridge_ingress_mcast_fhs_cleanup(struct mlx5_esw_bridge_offloads *br_offloads)
{
if (br_offloads->mld_done_handle)
mlx5_del_flow_rules(br_offloads->mld_done_handle);
br_offloads->mld_done_handle = NULL;
if (br_offloads->mld_report_handle)
mlx5_del_flow_rules(br_offloads->mld_report_handle);
br_offloads->mld_report_handle = NULL;
if (br_offloads->mld_query_handle)
mlx5_del_flow_rules(br_offloads->mld_query_handle);
br_offloads->mld_query_handle = NULL;
if (br_offloads->igmp_handle)
mlx5_del_flow_rules(br_offloads->igmp_handle);
br_offloads->igmp_handle = NULL;
}
static int mlx5_esw_brige_mcast_global_enable(struct mlx5_esw_bridge_offloads *br_offloads)
{
int err;
if (br_offloads->ingress_igmp_fg)
return 0; /* already enabled by another bridge */
err = mlx5_esw_bridge_ingress_mcast_fgs_init(br_offloads);
if (err) {
esw_warn(br_offloads->esw->dev,
"Failed to create global multicast flow groups (err=%d)\n",
err);
return err;
}
err = mlx5_esw_bridge_ingress_mcast_fhs_create(br_offloads);
if (err) {
esw_warn(br_offloads->esw->dev,
"Failed to create global multicast flows (err=%d)\n",
err);
goto err_fhs;
}
return 0;
err_fhs:
mlx5_esw_bridge_ingress_mcast_fgs_cleanup(br_offloads);
return err;
}
static void mlx5_esw_brige_mcast_global_disable(struct mlx5_esw_bridge_offloads *br_offloads)
{
struct mlx5_esw_bridge *br;
list_for_each_entry(br, &br_offloads->bridges, list) {
/* Ingress table is global, so only disable snooping when all
* bridges on esw have multicast disabled.
*/
if (br->flags & MLX5_ESW_BRIDGE_MCAST_FLAG)
return;
}
mlx5_esw_bridge_ingress_mcast_fhs_cleanup(br_offloads);
mlx5_esw_bridge_ingress_mcast_fgs_cleanup(br_offloads);
}
int mlx5_esw_bridge_mcast_enable(struct mlx5_esw_bridge *bridge)
{
int err;
err = mlx5_esw_brige_mcast_global_enable(bridge->br_offloads);
if (err)
return err;
bridge->flags |= MLX5_ESW_BRIDGE_MCAST_FLAG;
return 0;
}
void mlx5_esw_bridge_mcast_disable(struct mlx5_esw_bridge *bridge)
{
bridge->flags &= ~MLX5_ESW_BRIDGE_MCAST_FLAG;
mlx5_esw_brige_mcast_global_disable(bridge->br_offloads);
}
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