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|
/*
* This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
*
* Copyright (c) 2017 Chelsio Communications, Inc. 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/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include "cxgb4.h"
#include "cxgb4_tc_flower.h"
#define STATS_CHECK_PERIOD (HZ / 2)
static struct ch_tc_flower_entry *allocate_flower_entry(void)
{
struct ch_tc_flower_entry *new = kzalloc(sizeof(*new), GFP_KERNEL);
spin_lock_init(&new->lock);
return new;
}
/* Must be called with either RTNL or rcu_read_lock */
static struct ch_tc_flower_entry *ch_flower_lookup(struct adapter *adap,
unsigned long flower_cookie)
{
struct ch_tc_flower_entry *flower_entry;
hash_for_each_possible_rcu(adap->flower_anymatch_tbl, flower_entry,
link, flower_cookie)
if (flower_entry->tc_flower_cookie == flower_cookie)
return flower_entry;
return NULL;
}
static void cxgb4_process_flow_match(struct net_device *dev,
struct tc_cls_flower_offload *cls,
struct ch_filter_specification *fs)
{
u16 addr_type = 0;
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_dissector_key_control *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_CONTROL,
cls->key);
addr_type = key->addr_type;
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->key);
struct flow_dissector_key_basic *mask =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->mask);
u16 ethtype_key = ntohs(key->n_proto);
u16 ethtype_mask = ntohs(mask->n_proto);
if (ethtype_key == ETH_P_ALL) {
ethtype_key = 0;
ethtype_mask = 0;
}
fs->val.ethtype = ethtype_key;
fs->mask.ethtype = ethtype_mask;
fs->val.proto = key->ip_proto;
fs->mask.proto = mask->ip_proto;
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
struct flow_dissector_key_ipv4_addrs *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
cls->key);
struct flow_dissector_key_ipv4_addrs *mask =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
cls->mask);
fs->type = 0;
memcpy(&fs->val.lip[0], &key->dst, sizeof(key->dst));
memcpy(&fs->val.fip[0], &key->src, sizeof(key->src));
memcpy(&fs->mask.lip[0], &mask->dst, sizeof(mask->dst));
memcpy(&fs->mask.fip[0], &mask->src, sizeof(mask->src));
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
struct flow_dissector_key_ipv6_addrs *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
cls->key);
struct flow_dissector_key_ipv6_addrs *mask =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
cls->mask);
fs->type = 1;
memcpy(&fs->val.lip[0], key->dst.s6_addr, sizeof(key->dst));
memcpy(&fs->val.fip[0], key->src.s6_addr, sizeof(key->src));
memcpy(&fs->mask.lip[0], mask->dst.s6_addr, sizeof(mask->dst));
memcpy(&fs->mask.fip[0], mask->src.s6_addr, sizeof(mask->src));
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
struct flow_dissector_key_ports *key, *mask;
key = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_PORTS,
cls->key);
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_PORTS,
cls->mask);
fs->val.lport = cpu_to_be16(key->dst);
fs->mask.lport = cpu_to_be16(mask->dst);
fs->val.fport = cpu_to_be16(key->src);
fs->mask.fport = cpu_to_be16(mask->src);
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) {
struct flow_dissector_key_ip *key, *mask;
key = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->key);
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->mask);
fs->val.tos = key->tos;
fs->mask.tos = mask->tos;
}
/* Match only packets coming from the ingress port where this
* filter will be created.
*/
fs->val.iport = netdev2pinfo(dev)->port_id;
fs->mask.iport = ~0;
}
static int cxgb4_validate_flow_match(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
u16 ethtype_mask = 0;
u16 ethtype_key = 0;
if (cls->dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_IP))) {
netdev_warn(dev, "Unsupported key used: 0x%x\n",
cls->dissector->used_keys);
return -EOPNOTSUPP;
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->key);
struct flow_dissector_key_basic *mask =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->mask);
ethtype_key = ntohs(key->n_proto);
ethtype_mask = ntohs(mask->n_proto);
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) {
u16 eth_ip_type = ethtype_key & ethtype_mask;
struct flow_dissector_key_ip *mask;
if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) {
netdev_err(dev, "IP Key supported only with IPv4/v6");
return -EINVAL;
}
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->mask);
if (mask->ttl) {
netdev_warn(dev, "ttl match unsupported for offload");
return -EOPNOTSUPP;
}
}
return 0;
}
static void cxgb4_process_flow_actions(struct net_device *in,
struct tc_cls_flower_offload *cls,
struct ch_filter_specification *fs)
{
const struct tc_action *a;
LIST_HEAD(actions);
tcf_exts_to_list(cls->exts, &actions);
list_for_each_entry(a, &actions, list) {
if (is_tcf_gact_shot(a)) {
fs->action = FILTER_DROP;
} else if (is_tcf_mirred_egress_redirect(a)) {
int ifindex = tcf_mirred_ifindex(a);
struct net_device *out = __dev_get_by_index(dev_net(in),
ifindex);
struct port_info *pi = netdev_priv(out);
fs->action = FILTER_SWITCH;
fs->eport = pi->port_id;
} else if (is_tcf_vlan(a)) {
u32 vlan_action = tcf_vlan_action(a);
u8 prio = tcf_vlan_push_prio(a);
u16 vid = tcf_vlan_push_vid(a);
u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid;
switch (vlan_action) {
case TCA_VLAN_ACT_POP:
fs->newvlan |= VLAN_REMOVE;
break;
case TCA_VLAN_ACT_PUSH:
fs->newvlan |= VLAN_INSERT;
fs->vlan = vlan_tci;
break;
case TCA_VLAN_ACT_MODIFY:
fs->newvlan |= VLAN_REWRITE;
fs->vlan = vlan_tci;
break;
default:
break;
}
}
}
}
static int cxgb4_validate_flow_actions(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
const struct tc_action *a;
LIST_HEAD(actions);
tcf_exts_to_list(cls->exts, &actions);
list_for_each_entry(a, &actions, list) {
if (is_tcf_gact_shot(a)) {
/* Do nothing */
} else if (is_tcf_mirred_egress_redirect(a)) {
struct adapter *adap = netdev2adap(dev);
struct net_device *n_dev;
unsigned int i, ifindex;
bool found = false;
ifindex = tcf_mirred_ifindex(a);
for_each_port(adap, i) {
n_dev = adap->port[i];
if (ifindex == n_dev->ifindex) {
found = true;
break;
}
}
/* If interface doesn't belong to our hw, then
* the provided output port is not valid
*/
if (!found) {
netdev_err(dev, "%s: Out port invalid\n",
__func__);
return -EINVAL;
}
} else if (is_tcf_vlan(a)) {
u16 proto = be16_to_cpu(tcf_vlan_push_proto(a));
u32 vlan_action = tcf_vlan_action(a);
switch (vlan_action) {
case TCA_VLAN_ACT_POP:
break;
case TCA_VLAN_ACT_PUSH:
case TCA_VLAN_ACT_MODIFY:
if (proto != ETH_P_8021Q) {
netdev_err(dev, "%s: Unsupported vlan proto\n",
__func__);
return -EOPNOTSUPP;
}
break;
default:
netdev_err(dev, "%s: Unsupported vlan action\n",
__func__);
return -EOPNOTSUPP;
}
} else {
netdev_err(dev, "%s: Unsupported action\n", __func__);
return -EOPNOTSUPP;
}
}
return 0;
}
int cxgb4_tc_flower_replace(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
struct adapter *adap = netdev2adap(dev);
struct ch_tc_flower_entry *ch_flower;
struct ch_filter_specification *fs;
struct filter_ctx ctx;
int fidx;
int ret;
if (cxgb4_validate_flow_actions(dev, cls))
return -EOPNOTSUPP;
if (cxgb4_validate_flow_match(dev, cls))
return -EOPNOTSUPP;
ch_flower = allocate_flower_entry();
if (!ch_flower) {
netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__);
return -ENOMEM;
}
fs = &ch_flower->fs;
fs->hitcnts = 1;
cxgb4_process_flow_actions(dev, cls, fs);
cxgb4_process_flow_match(dev, cls, fs);
fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET);
if (fidx < 0) {
netdev_err(dev, "%s: No fidx for offload.\n", __func__);
ret = -ENOMEM;
goto free_entry;
}
init_completion(&ctx.completion);
ret = __cxgb4_set_filter(dev, fidx, fs, &ctx);
if (ret) {
netdev_err(dev, "%s: filter creation err %d\n",
__func__, ret);
goto free_entry;
}
/* Wait for reply */
ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ);
if (!ret) {
ret = -ETIMEDOUT;
goto free_entry;
}
ret = ctx.result;
/* Check if hw returned error for filter creation */
if (ret) {
netdev_err(dev, "%s: filter creation err %d\n",
__func__, ret);
goto free_entry;
}
INIT_HLIST_NODE(&ch_flower->link);
ch_flower->tc_flower_cookie = cls->cookie;
ch_flower->filter_id = ctx.tid;
hash_add_rcu(adap->flower_anymatch_tbl, &ch_flower->link, cls->cookie);
return ret;
free_entry:
kfree(ch_flower);
return ret;
}
int cxgb4_tc_flower_destroy(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
struct adapter *adap = netdev2adap(dev);
struct ch_tc_flower_entry *ch_flower;
int ret;
ch_flower = ch_flower_lookup(adap, cls->cookie);
if (!ch_flower)
return -ENOENT;
ret = cxgb4_del_filter(dev, ch_flower->filter_id);
if (ret)
goto err;
hash_del_rcu(&ch_flower->link);
kfree_rcu(ch_flower, rcu);
err:
return ret;
}
static void ch_flower_stats_cb(unsigned long data)
{
struct adapter *adap = (struct adapter *)data;
struct ch_tc_flower_entry *flower_entry;
struct ch_tc_flower_stats *ofld_stats;
unsigned int i;
u64 packets;
u64 bytes;
int ret;
rcu_read_lock();
hash_for_each_rcu(adap->flower_anymatch_tbl, i, flower_entry, link) {
ret = cxgb4_get_filter_counters(adap->port[0],
flower_entry->filter_id,
&packets, &bytes);
if (!ret) {
spin_lock(&flower_entry->lock);
ofld_stats = &flower_entry->stats;
if (ofld_stats->prev_packet_count != packets) {
ofld_stats->prev_packet_count = packets;
ofld_stats->last_used = jiffies;
}
spin_unlock(&flower_entry->lock);
}
}
rcu_read_unlock();
mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
}
int cxgb4_tc_flower_stats(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
struct adapter *adap = netdev2adap(dev);
struct ch_tc_flower_stats *ofld_stats;
struct ch_tc_flower_entry *ch_flower;
u64 packets;
u64 bytes;
int ret;
ch_flower = ch_flower_lookup(adap, cls->cookie);
if (!ch_flower) {
ret = -ENOENT;
goto err;
}
ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id,
&packets, &bytes);
if (ret < 0)
goto err;
spin_lock_bh(&ch_flower->lock);
ofld_stats = &ch_flower->stats;
if (ofld_stats->packet_count != packets) {
if (ofld_stats->prev_packet_count != packets)
ofld_stats->last_used = jiffies;
tcf_exts_stats_update(cls->exts, bytes - ofld_stats->byte_count,
packets - ofld_stats->packet_count,
ofld_stats->last_used);
ofld_stats->packet_count = packets;
ofld_stats->byte_count = bytes;
ofld_stats->prev_packet_count = packets;
}
spin_unlock_bh(&ch_flower->lock);
return 0;
err:
return ret;
}
void cxgb4_init_tc_flower(struct adapter *adap)
{
hash_init(adap->flower_anymatch_tbl);
setup_timer(&adap->flower_stats_timer, ch_flower_stats_cb,
(unsigned long)adap);
mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
}
void cxgb4_cleanup_tc_flower(struct adapter *adap)
{
if (adap->flower_stats_timer.function)
del_timer_sync(&adap->flower_stats_timer);
}
|