/*
* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <net/flow_dissector.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_skbedit.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/device.h>
#include <linux/rhashtable.h>
#include <net/switchdev.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
#include <net/vxlan.h>
#include "en.h"
#include "en_tc.h"
#include "eswitch.h"
#include "vxlan.h"
struct mlx5e_tc_flow {
struct rhash_head node;
u64 cookie;
struct mlx5_flow_handle *rule;
struct list_head encap; /* flows sharing the same encap */
struct mlx5_esw_flow_attr *attr;
};
enum {
MLX5_HEADER_TYPE_VXLAN = 0x0,
MLX5_HEADER_TYPE_NVGRE = 0x1,
};
#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
#define MLX5E_TC_TABLE_NUM_GROUPS 4
static struct mlx5_flow_handle *
mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
u32 action, u32 flow_tag)
{
struct mlx5_core_dev *dev = priv->mdev;
struct mlx5_flow_destination dest = { 0 };
struct mlx5_flow_act flow_act = {
.action = action,
.flow_tag = flow_tag,
.encap_id = 0,
};
struct mlx5_fc *counter = NULL;
struct mlx5_flow_handle *rule;
bool table_created = false;
if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
dest.ft = priv->fs.vlan.ft.t;
} else if (action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
counter = mlx5_fc_create(dev, true);
if (IS_ERR(counter))
return ERR_CAST(counter);
dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
dest.counter = counter;
}
if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
priv->fs.tc.t =
mlx5_create_auto_grouped_flow_table(priv->fs.ns,
MLX5E_TC_PRIO,
MLX5E_TC_TABLE_NUM_ENTRIES,
MLX5E_TC_TABLE_NUM_GROUPS,
0, 0);
if (IS_ERR(priv->fs.tc.t)) {
netdev_err(priv->netdev,
"Failed to create tc offload table\n");
rule = ERR_CAST(priv->fs.tc.t);
goto err_create_ft;
}
table_created = true;
}
spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
rule = mlx5_add_flow_rules(priv->fs.tc.t, spec, &flow_act, &dest, 1);
if (IS_ERR(rule))
goto err_add_rule;
return rule;
err_add_rule:
if (table_created) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
err_create_ft:
mlx5_fc_destroy(dev, counter);
return rule;
}
static struct mlx5_flow_handle *
mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
int err;
err = mlx5_eswitch_add_vlan_action(esw, attr);
if (err)
return ERR_PTR(err);
return mlx5_eswitch_add_offloaded_rule(esw, spec, attr);
}
static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_fc *counter = NULL;
counter = mlx5_flow_rule_counter(flow->rule);
mlx5_del_flow_rules(flow->rule);
if (esw && esw->mode == SRIOV_OFFLOADS)
mlx5_eswitch_del_vlan_action(esw, flow->attr);
mlx5_fc_destroy(priv->mdev, counter);
if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
}
static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f)
{
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
outer_headers);
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
outer_headers);
void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
misc_parameters);
void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
misc_parameters);
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
struct flow_dissector_key_keyid *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_KEYID,
f->key);
struct flow_dissector_key_keyid *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_KEYID,
f->mask);
MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
be32_to_cpu(mask->keyid));
MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
be32_to_cpu(key->keyid));
}
}
static int parse_tunnel_attr(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f)
{
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
outer_headers);
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
outer_headers);
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
struct flow_dissector_key_ports *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_PORTS,
f->key);
struct flow_dissector_key_ports *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_PORTS,
f->mask);
/* Full udp dst port must be given */
if (memchr_inv(&mask->dst, 0xff, sizeof(mask->dst)))
return -EOPNOTSUPP;
/* udp src port isn't supported */
if (memchr_inv(&mask->src, 0, sizeof(mask->src)))
return -EOPNOTSUPP;
if (mlx5e_vxlan_lookup_port(priv, be16_to_cpu(key->dst)) &&
MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
parse_vxlan_attr(spec, f);
else
return -EOPNOTSUPP;
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
udp_dport, ntohs(mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
udp_dport, ntohs(key->dst));
} else { /* udp dst port must be given */
return -EOPNOTSUPP;
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
struct flow_dissector_key_ipv4_addrs *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
f->key);
struct flow_dissector_key_ipv4_addrs *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
f->mask);
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv4_layout.ipv4,
ntohl(mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv4_layout.ipv4,
ntohl(key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
ntohl(mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
ntohl(key->dst));
}
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IP);
/* Enforce DMAC when offloading incoming tunneled flows.
* Flow counters require a match on the DMAC.
*/
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_47_16);
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_15_0);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dmac_47_16), priv->netdev->dev_addr);
/* let software handle IP fragments */
MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag, 0);
return 0;
}
static int __parse_cls_flower(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f,
u8 *min_inline)
{
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
outer_headers);
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
outer_headers);
u16 addr_type = 0;
u8 ip_proto = 0;
*min_inline = MLX5_INLINE_MODE_L2;
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_VLAN) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) |
BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL))) {
netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
f->dissector->used_keys);
return -EOPNOTSUPP;
}
if ((dissector_uses_key(f->dissector,
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) &&
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
struct flow_dissector_key_control *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ENC_CONTROL,
f->key);
switch (key->addr_type) {
case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
if (parse_tunnel_attr(priv, spec, f))
return -EOPNOTSUPP;
break;
default:
return -EOPNOTSUPP;
}
/* In decap flow, header pointers should point to the inner
* headers, outer header were already set by parse_tunnel_attr
*/
headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
inner_headers);
headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
inner_headers);
}
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);
ip_proto = key->ip_proto;
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
ntohs(mask->n_proto));
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
ntohs(key->n_proto));
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
mask->ip_proto);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
key->ip_proto);
if (mask->ip_proto)
*min_inline = MLX5_INLINE_MODE_IP;
}
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);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dmac_47_16),
mask->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dmac_47_16),
key->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
smac_47_16),
mask->src);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
smac_47_16),
key->src);
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
struct flow_dissector_key_vlan *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_VLAN,
f->key);
struct flow_dissector_key_vlan *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_VLAN,
f->mask);
if (mask->vlan_id || mask->vlan_priority) {
MLX5_SET(fte_match_set_lyr_2_4, headers_c, vlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, vlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_vid, mask->vlan_id);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid, key->vlan_id);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_prio, mask->vlan_priority);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_prio, key->vlan_priority);
}
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
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);
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv4_layout.ipv4),
&mask->src, sizeof(mask->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv4_layout.ipv4),
&key->src, sizeof(key->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
&mask->dst, sizeof(mask->dst));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
&key->dst, sizeof(key->dst));
if (mask->src || mask->dst)
*min_inline = MLX5_INLINE_MODE_IP;
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
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);
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&mask->src, sizeof(mask->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&key->src, sizeof(key->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&mask->dst, sizeof(mask->dst));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&key->dst, sizeof(key->dst));
if (ipv6_addr_type(&mask->src) != IPV6_ADDR_ANY ||
ipv6_addr_type(&mask->dst) != IPV6_ADDR_ANY)
*min_inline = MLX5_INLINE_MODE_IP;
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
struct flow_dissector_key_ports *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_PORTS,
f->key);
struct flow_dissector_key_ports *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_PORTS,
f->mask);
switch (ip_proto) {
case IPPROTO_TCP:
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
tcp_sport, ntohs(mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
tcp_sport, ntohs(key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
tcp_dport, ntohs(mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
tcp_dport, ntohs(key->dst));
break;
case IPPROTO_UDP:
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
udp_sport, ntohs(mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
udp_sport, ntohs(key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
udp_dport, ntohs(mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
udp_dport, ntohs(key->dst));
break;
default:
netdev_err(priv->netdev,
"Only UDP and TCP transport are supported\n");
return -EINVAL;
}
if (mask->src || mask->dst)
*min_inline = MLX5_INLINE_MODE_TCP_UDP;
}
return 0;
}
static int parse_cls_flower(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f)
{
struct mlx5_core_dev *dev = priv->mdev;
struct mlx5_eswitch *esw = dev->priv.eswitch;
struct mlx5_eswitch_rep *rep = priv->ppriv;
u8 min_inline;
int err;
err = __parse_cls_flower(priv, spec, f, &min_inline);
if (!err && esw->mode == SRIOV_OFFLOADS &&
rep->vport != FDB_UPLINK_VPORT) {
if (min_inline > esw->offloads.inline_mode) {
netdev_warn(priv->netdev,
"Flow is not offloaded due to min inline setting, required %d actual %d\n",
min_inline, esw->offloads.inline_mode);
return -EOPNOTSUPP;
}
}
return err;
}
static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
u32 *action, u32 *flow_tag)
{
const struct tc_action *a;
LIST_HEAD(actions);
if (tc_no_actions(exts))
return -EINVAL;
*flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
*action = 0;
tcf_exts_to_list(exts, &actions);
list_for_each_entry(a, &actions, list) {
/* Only support a single action per rule */
if (*action)
return -EINVAL;
if (is_tcf_gact_shot(a)) {
*action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
if (MLX5_CAP_FLOWTABLE(priv->mdev,
flow_table_properties_nic_receive.flow_counter))
*action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
continue;
}
if (is_tcf_skbedit_mark(a)) {
u32 mark = tcf_skbedit_mark(a);
if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
mark);
return -EINVAL;
}
*flow_tag = mark;
*action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
continue;
}
return -EINVAL;
}
return 0;
}
static inline int cmp_encap_info(struct mlx5_encap_info *a,
struct mlx5_encap_info *b)
{
return memcmp(a, b, sizeof(*a));
}
static inline int hash_encap_info(struct mlx5_encap_info *info)
{
return jhash(info, sizeof(*info), 0);
}
static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
struct net_device *mirred_dev,
struct net_device **out_dev,
struct flowi4 *fl4,
struct neighbour **out_n,
__be32 *saddr,
int *out_ttl)
{
struct rtable *rt;
struct neighbour *n = NULL;
int ttl;
#if IS_ENABLED(CONFIG_INET)
rt = ip_route_output_key(dev_net(mirred_dev), fl4);
if (IS_ERR(rt)) {
pr_warn("%s: no route to %pI4\n", __func__, &fl4->daddr);
return -EOPNOTSUPP;
}
#else
return -EOPNOTSUPP;
#endif
if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev)) {
pr_warn("%s: Can't offload the flow, netdevices aren't on the same HW e-switch\n",
__func__);
ip_rt_put(rt);
return -EOPNOTSUPP;
}
ttl = ip4_dst_hoplimit(&rt->dst);
n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
ip_rt_put(rt);
if (!n)
return -ENOMEM;
*out_n = n;
*saddr = fl4->saddr;
*out_ttl = ttl;
*out_dev = rt->dst.dev;
return 0;
}
static int gen_vxlan_header_ipv4(struct net_device *out_dev,
char buf[],
unsigned char h_dest[ETH_ALEN],
int ttl,
__be32 daddr,
__be32 saddr,
__be16 udp_dst_port,
__be32 vx_vni)
{
int encap_size = VXLAN_HLEN + sizeof(struct iphdr) + ETH_HLEN;
struct ethhdr *eth = (struct ethhdr *)buf;
struct iphdr *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
memset(buf, 0, encap_size);
ether_addr_copy(eth->h_dest, h_dest);
ether_addr_copy(eth->h_source, out_dev->dev_addr);
eth->h_proto = htons(ETH_P_IP);
ip->daddr = daddr;
ip->saddr = saddr;
ip->ttl = ttl;
ip->protocol = IPPROTO_UDP;
ip->version = 0x4;
ip->ihl = 0x5;
udp->dest = udp_dst_port;
vxh->vx_flags = VXLAN_HF_VNI;
vxh->vx_vni = vxlan_vni_field(vx_vni);
return encap_size;
}
static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
struct net_device *mirred_dev,
struct mlx5_encap_entry *e,
struct net_device **out_dev)
{
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
struct flowi4 fl4 = {};
struct neighbour *n;
char *encap_header;
int encap_size;
__be32 saddr;
int ttl;
int err;
encap_header = kzalloc(max_encap_size, GFP_KERNEL);
if (!encap_header)
return -ENOMEM;
switch (e->tunnel_type) {
case MLX5_HEADER_TYPE_VXLAN:
fl4.flowi4_proto = IPPROTO_UDP;
fl4.fl4_dport = e->tun_info.tp_dst;
break;
default:
err = -EOPNOTSUPP;
goto out;
}
fl4.daddr = e->tun_info.daddr;
err = mlx5e_route_lookup_ipv4(priv, mirred_dev, out_dev,
&fl4, &n, &saddr, &ttl);
if (err)
goto out;
e->n = n;
e->out_dev = *out_dev;
if (!(n->nud_state & NUD_VALID)) {
err = -ENOTSUPP;
goto out;
}
neigh_ha_snapshot(e->h_dest, n, *out_dev);
switch (e->tunnel_type) {
case MLX5_HEADER_TYPE_VXLAN:
encap_size = gen_vxlan_header_ipv4(*out_dev, encap_header,
e->h_dest, ttl,
e->tun_info.daddr,
saddr, e->tun_info.tp_dst,
e->tun_info.tun_id);
break;
default:
err = -EOPNOTSUPP;
goto out;
}
err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
encap_size, encap_header, &e->encap_id);
out:
kfree(encap_header);
return err;
}
static int mlx5e_attach_encap(struct mlx5e_priv *priv,
struct ip_tunnel_info *tun_info,
struct net_device *mirred_dev,
struct mlx5_esw_flow_attr *attr)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
unsigned short family = ip_tunnel_info_af(tun_info);
struct ip_tunnel_key *key = &tun_info->key;
struct mlx5_encap_info info;
struct mlx5_encap_entry *e;
struct net_device *out_dev;
uintptr_t hash_key;
bool found = false;
int tunnel_type;
int err;
/* udp dst port must be given */
if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
return -EOPNOTSUPP;
if (mlx5e_vxlan_lookup_port(priv, be16_to_cpu(key->tp_dst)) &&
MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
info.tp_dst = key->tp_dst;
info.tun_id = tunnel_id_to_key32(key->tun_id);
tunnel_type = MLX5_HEADER_TYPE_VXLAN;
} else {
return -EOPNOTSUPP;
}
switch (family) {
case AF_INET:
info.daddr = key->u.ipv4.dst;
break;
default:
return -EOPNOTSUPP;
}
hash_key = hash_encap_info(&info);
hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
encap_hlist, hash_key) {
if (!cmp_encap_info(&e->tun_info, &info)) {
found = true;
break;
}
}
if (found) {
attr->encap = e;
return 0;
}
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (!e)
return -ENOMEM;
e->tun_info = info;
e->tunnel_type = tunnel_type;
INIT_LIST_HEAD(&e->flows);
err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e, &out_dev);
if (err)
goto out_err;
attr->encap = e;
hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
return err;
out_err:
kfree(e);
return err;
}
static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
struct mlx5e_tc_flow *flow)
{
struct mlx5_esw_flow_attr *attr = flow->attr;
struct ip_tunnel_info *info = NULL;
const struct tc_action *a;
LIST_HEAD(actions);
bool encap = false;
int err;
if (tc_no_actions(exts))
return -EINVAL;
memset(attr, 0, sizeof(*attr));
attr->in_rep = priv->ppriv;
tcf_exts_to_list(exts, &actions);
list_for_each_entry(a, &actions, list) {
if (is_tcf_gact_shot(a)) {
attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
continue;
}
if (is_tcf_mirred_egress_redirect(a)) {
int ifindex = tcf_mirred_ifindex(a);
struct net_device *out_dev;
struct mlx5e_priv *out_priv;
out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);
if (switchdev_port_same_parent_id(priv->netdev,
out_dev)) {
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
out_priv = netdev_priv(out_dev);
attr->out_rep = out_priv->ppriv;
} else if (encap) {
err = mlx5e_attach_encap(priv, info,
out_dev, attr);
if (err)
return err;
list_add(&flow->encap, &attr->encap->flows);
attr->action |= MLX5_FLOW_CONTEXT_ACTION_ENCAP |
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
out_priv = netdev_priv(attr->encap->out_dev);
attr->out_rep = out_priv->ppriv;
} else {
pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
priv->netdev->name, out_dev->name);
return -EINVAL;
}
continue;
}
if (is_tcf_tunnel_set(a)) {
info = tcf_tunnel_info(a);
if (info)
encap = true;
else
return -EOPNOTSUPP;
continue;
}
if (is_tcf_vlan(a)) {
if (tcf_vlan_action(a) == VLAN_F_POP) {
attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
} else if (tcf_vlan_action(a) == VLAN_F_PUSH) {
if (tcf_vlan_push_proto(a) != htons(ETH_P_8021Q))
return -EOPNOTSUPP;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
attr->vlan = tcf_vlan_push_vid(a);
}
continue;
}
if (is_tcf_tunnel_release(a)) {
attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
continue;
}
return -EINVAL;
}
return 0;
}
int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
struct tc_cls_flower_offload *f)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
int err = 0;
bool fdb_flow = false;
u32 flow_tag, action;
struct mlx5e_tc_flow *flow;
struct mlx5_flow_spec *spec;
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
if (esw && esw->mode == SRIOV_OFFLOADS)
fdb_flow = true;
if (fdb_flow)
flow = kzalloc(sizeof(*flow) +
sizeof(struct mlx5_esw_flow_attr),
GFP_KERNEL);
else
flow = kzalloc(sizeof(*flow), GFP_KERNEL);
spec = mlx5_vzalloc(sizeof(*spec));
if (!spec || !flow) {
err = -ENOMEM;
goto err_free;
}
flow->cookie = f->cookie;
err = parse_cls_flower(priv, spec, f);
if (err < 0)
goto err_free;
if (fdb_flow) {
flow->attr = (struct mlx5_esw_flow_attr *)(flow + 1);
err = parse_tc_fdb_actions(priv, f->exts, flow);
if (err < 0)
goto err_free;
flow->rule = mlx5e_tc_add_fdb_flow(priv, spec, flow->attr);
} else {
err = parse_tc_nic_actions(priv, f->exts, &action, &flow_tag);
if (err < 0)
goto err_free;
flow->rule = mlx5e_tc_add_nic_flow(priv, spec, action, flow_tag);
}
if (IS_ERR(flow->rule)) {
err = PTR_ERR(flow->rule);
goto err_free;
}
err = rhashtable_insert_fast(&tc->ht, &flow->node,
tc->ht_params);
if (err)
goto err_del_rule;
goto out;
err_del_rule:
mlx5_del_flow_rules(flow->rule);
err_free:
kfree(flow);
out:
kvfree(spec);
return err;
}
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow) {
struct list_head *next = flow->encap.next;
list_del(&flow->encap);
if (list_empty(next)) {
struct mlx5_encap_entry *e;
e = list_entry(next, struct mlx5_encap_entry, flows);
if (e->n) {
mlx5_encap_dealloc(priv->mdev, e->encap_id);
neigh_release(e->n);
}
hlist_del_rcu(&e->encap_hlist);
kfree(e);
}
}
int mlx5e_delete_flower(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f)
{
struct mlx5e_tc_flow *flow;
struct mlx5e_tc_table *tc = &priv->fs.tc;
flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
tc->ht_params);
if (!flow)
return -EINVAL;
rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
mlx5e_tc_del_flow(priv, flow);
if (flow->attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP)
mlx5e_detach_encap(priv, flow);
kfree(flow);
return 0;
}
int mlx5e_stats_flower(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
struct mlx5e_tc_flow *flow;
struct tc_action *a;
struct mlx5_fc *counter;
LIST_HEAD(actions);
u64 bytes;
u64 packets;
u64 lastuse;
flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
tc->ht_params);
if (!flow)
return -EINVAL;
counter = mlx5_flow_rule_counter(flow->rule);
if (!counter)
return 0;
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
tcf_exts_to_list(f->exts, &actions);
list_for_each_entry(a, &actions, list)
tcf_action_stats_update(a, bytes, packets, lastuse);
return 0;
}
static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
.head_offset = offsetof(struct mlx5e_tc_flow, node),
.key_offset = offsetof(struct mlx5e_tc_flow, cookie),
.key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
.automatic_shrinking = true,
};
int mlx5e_tc_init(struct mlx5e_priv *priv)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
tc->ht_params = mlx5e_tc_flow_ht_params;
return rhashtable_init(&tc->ht, &tc->ht_params);
}
static void _mlx5e_tc_del_flow(void *ptr, void *arg)
{
struct mlx5e_tc_flow *flow = ptr;
struct mlx5e_priv *priv = arg;
mlx5e_tc_del_flow(priv, flow);
kfree(flow);
}
void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
if (!IS_ERR_OR_NULL(tc->t)) {
mlx5_destroy_flow_table(tc->t);
tc->t = NULL;
}
}
