/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <net/flow_dissector.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include "spectrum.h"
#include "core_acl_flex_keys.h"
static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev,
struct mlxsw_sp_acl_rule_info *rulei,
struct tcf_exts *exts)
{
const struct tc_action *a;
LIST_HEAD(actions);
int err;
if (tc_no_actions(exts))
return 0;
tcf_exts_to_list(exts, &actions);
list_for_each_entry(a, &actions, list) {
if (is_tcf_gact_shot(a)) {
err = mlxsw_sp_acl_rulei_act_drop(rulei);
if (err)
return err;
} else if (is_tcf_mirred_egress_redirect(a)) {
int ifindex = tcf_mirred_ifindex(a);
struct net_device *out_dev;
out_dev = __dev_get_by_index(dev_net(dev), ifindex);
if (out_dev == dev)
out_dev = NULL;
err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
out_dev);
if (err)
return err;
} else {
dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
return -EOPNOTSUPP;
}
}
return 0;
}
static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
struct tc_cls_flower_offload *f)
{
struct flow_dissector_key_ipv4_addrs *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
f->key);
struct flow_dissector_key_ipv4_addrs *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
f->mask);
mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_IP4,
ntohl(key->src), ntohl(mask->src));
mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_IP4,
ntohl(key->dst), ntohl(mask->dst));
}
static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
struct tc_cls_flower_offload *f)
{
struct flow_dissector_key_ipv6_addrs *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
f->key);
struct flow_dissector_key_ipv6_addrs *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
f->mask);
size_t addr_half_size = sizeof(key->src) / 2;
mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_HI,
&key->src.s6_addr[0],
&mask->src.s6_addr[0],
addr_half_size);
mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_LO,
&key->src.s6_addr[addr_half_size],
&mask->src.s6_addr[addr_half_size],
addr_half_size);
mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_HI,
&key->dst.s6_addr[0],
&mask->dst.s6_addr[0],
addr_half_size);
mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_LO,
&key->dst.s6_addr[addr_half_size],
&mask->dst.s6_addr[addr_half_size],
addr_half_size);
}
static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_rule_info *rulei,
struct tc_cls_flower_offload *f,
u8 ip_proto)
{
struct flow_dissector_key_ports *key, *mask;
if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS))
return 0;
if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
return -EINVAL;
}
key = skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_PORTS,
f->key);
mask = skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_PORTS,
f->mask);
mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
ntohs(key->dst), ntohs(mask->dst));
mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
ntohs(key->src), ntohs(mask->src));
return 0;
}
static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev,
struct mlxsw_sp_acl_rule_info *rulei,
struct tc_cls_flower_offload *f)
{
u16 addr_type = 0;
u8 ip_proto = 0;
int err;
if (f->dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_PORTS))) {
dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
return -EOPNOTSUPP;
}
mlxsw_sp_acl_rulei_priority(rulei, f->prio);
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_dissector_key_control *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_CONTROL,
f->key);
addr_type = key->addr_type;
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_BASIC,
f->key);
struct flow_dissector_key_basic *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_BASIC,
f->mask);
u16 n_proto_key = ntohs(key->n_proto);
u16 n_proto_mask = ntohs(mask->n_proto);
if (n_proto_key == ETH_P_ALL) {
n_proto_key = 0;
n_proto_mask = 0;
}
mlxsw_sp_acl_rulei_keymask_u32(rulei,
MLXSW_AFK_ELEMENT_ETHERTYPE,
n_proto_key, n_proto_mask);
ip_proto = key->ip_proto;
mlxsw_sp_acl_rulei_keymask_u32(rulei,
MLXSW_AFK_ELEMENT_IP_PROTO,
key->ip_proto, mask->ip_proto);
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_dissector_key_eth_addrs *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
f->key);
struct flow_dissector_key_eth_addrs *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
f->mask);
mlxsw_sp_acl_rulei_keymask_buf(rulei,
MLXSW_AFK_ELEMENT_DMAC,
key->dst, mask->dst,
sizeof(key->dst));
mlxsw_sp_acl_rulei_keymask_buf(rulei,
MLXSW_AFK_ELEMENT_SMAC,
key->src, mask->src,
sizeof(key->src));
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
mlxsw_sp_flower_parse_ipv4(rulei, f);
if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
mlxsw_sp_flower_parse_ipv6(rulei, f);
err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
if (err)
return err;
return mlxsw_sp_flower_parse_actions(mlxsw_sp, dev, rulei, f->exts);
}
int mlxsw_sp_flower_replace(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
__be16 protocol, struct tc_cls_flower_offload *f)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct net_device *dev = mlxsw_sp_port->dev;
struct mlxsw_sp_acl_rule_info *rulei;
struct mlxsw_sp_acl_ruleset *ruleset;
struct mlxsw_sp_acl_rule *rule;
int err;
ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, dev, ingress,
MLXSW_SP_ACL_PROFILE_FLOWER);
if (IS_ERR(ruleset))
return PTR_ERR(ruleset);
rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
goto err_rule_create;
}
rulei = mlxsw_sp_acl_rule_rulei(rule);
err = mlxsw_sp_flower_parse(mlxsw_sp, dev, rulei, f);
if (err)
goto err_flower_parse;
err = mlxsw_sp_acl_rulei_commit(rulei);
if (err)
goto err_rulei_commit;
err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
if (err)
goto err_rule_add;
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
return 0;
err_rule_add:
err_rulei_commit:
err_flower_parse:
mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
err_rule_create:
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
return err;
}
void mlxsw_sp_flower_destroy(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
struct tc_cls_flower_offload *f)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_acl_ruleset *ruleset;
struct mlxsw_sp_acl_rule *rule;
ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, mlxsw_sp_port->dev,
ingress,
MLXSW_SP_ACL_PROFILE_FLOWER);
if (WARN_ON(IS_ERR(ruleset)))
return;
rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
if (!WARN_ON(!rule)) {
mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
}
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
}
