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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019 Mellanox Technologies */
#include <linux/mlx5/vport.h>
#include <rdma/ib_verbs.h>
#include <net/addrconf.h>
#include "lib/mlx5.h"
#include "eswitch.h"
#include "fs_core.h"
#include "rdma.h"
static void mlx5_rdma_disable_roce_steering(struct mlx5_core_dev *dev)
{
struct mlx5_core_roce *roce = &dev->priv.roce;
mlx5_del_flow_rules(roce->allow_rule);
mlx5_destroy_flow_group(roce->fg);
mlx5_destroy_flow_table(roce->ft);
}
static int mlx5_rdma_enable_roce_steering(struct mlx5_core_dev *dev)
{
int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
struct mlx5_core_roce *roce = &dev->priv.roce;
struct mlx5_flow_handle *flow_rule = NULL;
struct mlx5_flow_table_attr ft_attr = {};
struct mlx5_flow_namespace *ns = NULL;
struct mlx5_flow_act flow_act = {};
struct mlx5_flow_spec *spec;
struct mlx5_flow_table *ft;
struct mlx5_flow_group *fg;
void *match_criteria;
u32 *flow_group_in;
void *misc;
int err;
if (!(MLX5_CAP_FLOWTABLE_RDMA_RX(dev, ft_support) &&
MLX5_CAP_FLOWTABLE_RDMA_RX(dev, table_miss_action_domain)))
return -EOPNOTSUPP;
flow_group_in = kvzalloc(inlen, GFP_KERNEL);
if (!flow_group_in)
return -ENOMEM;
spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
if (!spec) {
kvfree(flow_group_in);
return -ENOMEM;
}
ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_RDMA_RX_KERNEL);
if (!ns) {
mlx5_core_err(dev, "Failed to get RDMA RX namespace");
err = -EOPNOTSUPP;
goto free;
}
ft_attr.max_fte = 1;
ft = mlx5_create_flow_table(ns, &ft_attr);
if (IS_ERR(ft)) {
mlx5_core_err(dev, "Failed to create RDMA RX flow table");
err = PTR_ERR(ft);
goto free;
}
MLX5_SET(create_flow_group_in, flow_group_in, match_criteria_enable,
MLX5_MATCH_MISC_PARAMETERS);
match_criteria = MLX5_ADDR_OF(create_flow_group_in, flow_group_in,
match_criteria);
MLX5_SET_TO_ONES(fte_match_param, match_criteria,
misc_parameters.source_port);
fg = mlx5_create_flow_group(ft, flow_group_in);
if (IS_ERR(fg)) {
err = PTR_ERR(fg);
mlx5_core_err(dev, "Failed to create RDMA RX flow group err(%d)\n", err);
goto destroy_flow_table;
}
spec->match_criteria_enable = MLX5_MATCH_MISC_PARAMETERS;
misc = MLX5_ADDR_OF(fte_match_param, spec->match_value,
misc_parameters);
MLX5_SET(fte_match_set_misc, misc, source_port,
dev->priv.eswitch->manager_vport);
misc = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
misc_parameters);
MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
flow_act.action = MLX5_FLOW_CONTEXT_ACTION_ALLOW;
flow_rule = mlx5_add_flow_rules(ft, spec, &flow_act, NULL, 0);
if (IS_ERR(flow_rule)) {
err = PTR_ERR(flow_rule);
mlx5_core_err(dev, "Failed to add RoCE allow rule, err=%d\n",
err);
goto destroy_flow_group;
}
kvfree(spec);
kvfree(flow_group_in);
roce->ft = ft;
roce->fg = fg;
roce->allow_rule = flow_rule;
return 0;
destroy_flow_group:
mlx5_destroy_flow_group(fg);
destroy_flow_table:
mlx5_destroy_flow_table(ft);
free:
kvfree(spec);
kvfree(flow_group_in);
return err;
}
static void mlx5_rdma_del_roce_addr(struct mlx5_core_dev *dev)
{
mlx5_core_roce_gid_set(dev, 0, 0, 0,
NULL, NULL, false, 0, 0);
}
static void mlx5_rdma_make_default_gid(struct mlx5_core_dev *dev, union ib_gid *gid)
{
u8 hw_id[ETH_ALEN];
mlx5_query_mac_address(dev, hw_id);
gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
addrconf_addr_eui48(&gid->raw[8], hw_id);
}
static int mlx5_rdma_add_roce_addr(struct mlx5_core_dev *dev)
{
union ib_gid gid;
u8 mac[ETH_ALEN];
mlx5_rdma_make_default_gid(dev, &gid);
return mlx5_core_roce_gid_set(dev, 0,
MLX5_ROCE_VERSION_1,
0, gid.raw, mac,
false, 0, 1);
}
void mlx5_rdma_disable_roce(struct mlx5_core_dev *dev)
{
struct mlx5_core_roce *roce = &dev->priv.roce;
if (!roce->ft)
return;
mlx5_rdma_disable_roce_steering(dev);
mlx5_rdma_del_roce_addr(dev);
mlx5_nic_vport_disable_roce(dev);
}
void mlx5_rdma_enable_roce(struct mlx5_core_dev *dev)
{
int err;
err = mlx5_nic_vport_enable_roce(dev);
if (err) {
mlx5_core_err(dev, "Failed to enable RoCE: %d\n", err);
return;
}
err = mlx5_rdma_add_roce_addr(dev);
if (err) {
mlx5_core_err(dev, "Failed to add RoCE address: %d\n", err);
goto disable_roce;
}
err = mlx5_rdma_enable_roce_steering(dev);
if (err) {
mlx5_core_err(dev, "Failed to enable RoCE steering: %d\n", err);
goto del_roce_addr;
}
return;
del_roce_addr:
mlx5_rdma_del_roce_addr(dev);
disable_roce:
mlx5_nic_vport_disable_roce(dev);
return;
}
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