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|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2020 Mellanox Technologies. */
#include <net/dst_metadata.h>
#include <linux/netdevice.h>
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/rtnetlink.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include "tc.h"
#include "neigh.h"
#include "en_rep.h"
#include "eswitch.h"
#include "lib/fs_chains.h"
#include "en/tc_ct.h"
#include "en/mapping.h"
#include "en/tc_tun.h"
#include "lib/port_tun.h"
struct mlx5e_rep_indr_block_priv {
struct net_device *netdev;
struct mlx5e_rep_priv *rpriv;
struct list_head list;
};
int mlx5e_rep_encap_entry_attach(struct mlx5e_priv *priv,
struct mlx5e_encap_entry *e,
struct mlx5e_neigh *m_neigh,
struct net_device *neigh_dev)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
struct mlx5_rep_uplink_priv *uplink_priv = &rpriv->uplink_priv;
struct mlx5_tun_entropy *tun_entropy = &uplink_priv->tun_entropy;
struct mlx5e_neigh_hash_entry *nhe;
int err;
err = mlx5_tun_entropy_refcount_inc(tun_entropy, e->reformat_type);
if (err)
return err;
mutex_lock(&rpriv->neigh_update.encap_lock);
nhe = mlx5e_rep_neigh_entry_lookup(priv, m_neigh);
if (!nhe) {
err = mlx5e_rep_neigh_entry_create(priv, m_neigh, neigh_dev, &nhe);
if (err) {
mutex_unlock(&rpriv->neigh_update.encap_lock);
mlx5_tun_entropy_refcount_dec(tun_entropy,
e->reformat_type);
return err;
}
}
e->nhe = nhe;
spin_lock(&nhe->encap_list_lock);
list_add_rcu(&e->encap_list, &nhe->encap_list);
spin_unlock(&nhe->encap_list_lock);
mutex_unlock(&rpriv->neigh_update.encap_lock);
return 0;
}
void mlx5e_rep_encap_entry_detach(struct mlx5e_priv *priv,
struct mlx5e_encap_entry *e)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
struct mlx5_rep_uplink_priv *uplink_priv = &rpriv->uplink_priv;
struct mlx5_tun_entropy *tun_entropy = &uplink_priv->tun_entropy;
if (!e->nhe)
return;
spin_lock(&e->nhe->encap_list_lock);
list_del_rcu(&e->encap_list);
spin_unlock(&e->nhe->encap_list_lock);
mlx5e_rep_neigh_entry_release(e->nhe);
e->nhe = NULL;
mlx5_tun_entropy_refcount_dec(tun_entropy, e->reformat_type);
}
void mlx5e_rep_update_flows(struct mlx5e_priv *priv,
struct mlx5e_encap_entry *e,
bool neigh_connected,
unsigned char ha[ETH_ALEN])
{
struct ethhdr *eth = (struct ethhdr *)e->encap_header;
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
bool encap_connected;
LIST_HEAD(flow_list);
ASSERT_RTNL();
/* wait for encap to be fully initialized */
wait_for_completion(&e->res_ready);
mutex_lock(&esw->offloads.encap_tbl_lock);
encap_connected = !!(e->flags & MLX5_ENCAP_ENTRY_VALID);
if (e->compl_result < 0 || (encap_connected == neigh_connected &&
ether_addr_equal(e->h_dest, ha)))
goto unlock;
mlx5e_take_all_encap_flows(e, &flow_list);
if ((e->flags & MLX5_ENCAP_ENTRY_VALID) &&
(!neigh_connected || !ether_addr_equal(e->h_dest, ha)))
mlx5e_tc_encap_flows_del(priv, e, &flow_list);
if (neigh_connected && !(e->flags & MLX5_ENCAP_ENTRY_VALID)) {
struct net_device *route_dev;
ether_addr_copy(e->h_dest, ha);
ether_addr_copy(eth->h_dest, ha);
/* Update the encap source mac, in case that we delete
* the flows when encap source mac changed.
*/
route_dev = __dev_get_by_index(dev_net(priv->netdev), e->route_dev_ifindex);
if (route_dev)
ether_addr_copy(eth->h_source, route_dev->dev_addr);
mlx5e_tc_encap_flows_add(priv, e, &flow_list);
}
unlock:
mutex_unlock(&esw->offloads.encap_tbl_lock);
mlx5e_put_flow_list(priv, &flow_list);
}
static int
mlx5e_rep_setup_tc_cls_flower(struct mlx5e_priv *priv,
struct flow_cls_offload *cls_flower, int flags)
{
switch (cls_flower->command) {
case FLOW_CLS_REPLACE:
return mlx5e_configure_flower(priv->netdev, priv, cls_flower,
flags);
case FLOW_CLS_DESTROY:
return mlx5e_delete_flower(priv->netdev, priv, cls_flower,
flags);
case FLOW_CLS_STATS:
return mlx5e_stats_flower(priv->netdev, priv, cls_flower,
flags);
default:
return -EOPNOTSUPP;
}
}
static
int mlx5e_rep_setup_tc_cls_matchall(struct mlx5e_priv *priv,
struct tc_cls_matchall_offload *ma)
{
switch (ma->command) {
case TC_CLSMATCHALL_REPLACE:
return mlx5e_tc_configure_matchall(priv, ma);
case TC_CLSMATCHALL_DESTROY:
return mlx5e_tc_delete_matchall(priv, ma);
case TC_CLSMATCHALL_STATS:
mlx5e_tc_stats_matchall(priv, ma);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int mlx5e_rep_setup_tc_cb(enum tc_setup_type type, void *type_data,
void *cb_priv)
{
unsigned long flags = MLX5_TC_FLAG(INGRESS) | MLX5_TC_FLAG(ESW_OFFLOAD);
struct mlx5e_priv *priv = cb_priv;
if (!priv->netdev || !netif_device_present(priv->netdev))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSFLOWER:
return mlx5e_rep_setup_tc_cls_flower(priv, type_data, flags);
case TC_SETUP_CLSMATCHALL:
return mlx5e_rep_setup_tc_cls_matchall(priv, type_data);
default:
return -EOPNOTSUPP;
}
}
static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data,
void *cb_priv)
{
struct flow_cls_offload tmp, *f = type_data;
struct mlx5e_priv *priv = cb_priv;
struct mlx5_eswitch *esw;
unsigned long flags;
int err;
flags = MLX5_TC_FLAG(INGRESS) |
MLX5_TC_FLAG(ESW_OFFLOAD) |
MLX5_TC_FLAG(FT_OFFLOAD);
esw = priv->mdev->priv.eswitch;
switch (type) {
case TC_SETUP_CLSFLOWER:
memcpy(&tmp, f, sizeof(*f));
if (!mlx5_chains_prios_supported(esw_chains(esw)))
return -EOPNOTSUPP;
/* Re-use tc offload path by moving the ft flow to the
* reserved ft chain.
*
* FT offload can use prio range [0, INT_MAX], so we normalize
* it to range [1, mlx5_esw_chains_get_prio_range(esw)]
* as with tc, where prio 0 isn't supported.
*
* We only support chain 0 of FT offload.
*/
if (tmp.common.prio >= mlx5_chains_get_prio_range(esw_chains(esw)))
return -EOPNOTSUPP;
if (tmp.common.chain_index != 0)
return -EOPNOTSUPP;
tmp.common.chain_index = mlx5_chains_get_nf_ft_chain(esw_chains(esw));
tmp.common.prio++;
err = mlx5e_rep_setup_tc_cls_flower(priv, &tmp, flags);
memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
return err;
default:
return -EOPNOTSUPP;
}
}
static LIST_HEAD(mlx5e_rep_block_tc_cb_list);
static LIST_HEAD(mlx5e_rep_block_ft_cb_list);
int mlx5e_rep_setup_tc(struct net_device *dev, enum tc_setup_type type,
void *type_data)
{
struct mlx5e_priv *priv = netdev_priv(dev);
struct flow_block_offload *f = type_data;
f->unlocked_driver_cb = true;
switch (type) {
case TC_SETUP_BLOCK:
return flow_block_cb_setup_simple(type_data,
&mlx5e_rep_block_tc_cb_list,
mlx5e_rep_setup_tc_cb,
priv, priv, true);
case TC_SETUP_FT:
return flow_block_cb_setup_simple(type_data,
&mlx5e_rep_block_ft_cb_list,
mlx5e_rep_setup_ft_cb,
priv, priv, true);
default:
return -EOPNOTSUPP;
}
}
int mlx5e_rep_tc_init(struct mlx5e_rep_priv *rpriv)
{
struct mlx5_rep_uplink_priv *uplink_priv = &rpriv->uplink_priv;
int err;
mutex_init(&uplink_priv->unready_flows_lock);
INIT_LIST_HEAD(&uplink_priv->unready_flows);
/* init shared tc flow table */
err = mlx5e_tc_esw_init(&uplink_priv->tc_ht);
return err;
}
void mlx5e_rep_tc_cleanup(struct mlx5e_rep_priv *rpriv)
{
/* delete shared tc flow table */
mlx5e_tc_esw_cleanup(&rpriv->uplink_priv.tc_ht);
mutex_destroy(&rpriv->uplink_priv.unready_flows_lock);
}
void mlx5e_rep_tc_enable(struct mlx5e_priv *priv)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
INIT_WORK(&rpriv->uplink_priv.reoffload_flows_work,
mlx5e_tc_reoffload_flows_work);
}
void mlx5e_rep_tc_disable(struct mlx5e_priv *priv)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
cancel_work_sync(&rpriv->uplink_priv.reoffload_flows_work);
}
int mlx5e_rep_tc_event_port_affinity(struct mlx5e_priv *priv)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
queue_work(priv->wq, &rpriv->uplink_priv.reoffload_flows_work);
return NOTIFY_OK;
}
static struct mlx5e_rep_indr_block_priv *
mlx5e_rep_indr_block_priv_lookup(struct mlx5e_rep_priv *rpriv,
struct net_device *netdev)
{
struct mlx5e_rep_indr_block_priv *cb_priv;
/* All callback list access should be protected by RTNL. */
ASSERT_RTNL();
list_for_each_entry(cb_priv,
&rpriv->uplink_priv.tc_indr_block_priv_list,
list)
if (cb_priv->netdev == netdev)
return cb_priv;
return NULL;
}
static int
mlx5e_rep_indr_offload(struct net_device *netdev,
struct flow_cls_offload *flower,
struct mlx5e_rep_indr_block_priv *indr_priv,
unsigned long flags)
{
struct mlx5e_priv *priv = netdev_priv(indr_priv->rpriv->netdev);
int err = 0;
if (!netif_device_present(indr_priv->rpriv->netdev))
return -EOPNOTSUPP;
switch (flower->command) {
case FLOW_CLS_REPLACE:
err = mlx5e_configure_flower(netdev, priv, flower, flags);
break;
case FLOW_CLS_DESTROY:
err = mlx5e_delete_flower(netdev, priv, flower, flags);
break;
case FLOW_CLS_STATS:
err = mlx5e_stats_flower(netdev, priv, flower, flags);
break;
default:
err = -EOPNOTSUPP;
}
return err;
}
static int mlx5e_rep_indr_setup_tc_cb(enum tc_setup_type type,
void *type_data, void *indr_priv)
{
unsigned long flags = MLX5_TC_FLAG(EGRESS) | MLX5_TC_FLAG(ESW_OFFLOAD);
struct mlx5e_rep_indr_block_priv *priv = indr_priv;
switch (type) {
case TC_SETUP_CLSFLOWER:
return mlx5e_rep_indr_offload(priv->netdev, type_data, priv,
flags);
default:
return -EOPNOTSUPP;
}
}
static int mlx5e_rep_indr_setup_ft_cb(enum tc_setup_type type,
void *type_data, void *indr_priv)
{
struct mlx5e_rep_indr_block_priv *priv = indr_priv;
struct flow_cls_offload *f = type_data;
struct flow_cls_offload tmp;
struct mlx5e_priv *mpriv;
struct mlx5_eswitch *esw;
unsigned long flags;
int err;
mpriv = netdev_priv(priv->rpriv->netdev);
esw = mpriv->mdev->priv.eswitch;
flags = MLX5_TC_FLAG(EGRESS) |
MLX5_TC_FLAG(ESW_OFFLOAD) |
MLX5_TC_FLAG(FT_OFFLOAD);
switch (type) {
case TC_SETUP_CLSFLOWER:
memcpy(&tmp, f, sizeof(*f));
/* Re-use tc offload path by moving the ft flow to the
* reserved ft chain.
*
* FT offload can use prio range [0, INT_MAX], so we normalize
* it to range [1, mlx5_esw_chains_get_prio_range(esw)]
* as with tc, where prio 0 isn't supported.
*
* We only support chain 0 of FT offload.
*/
if (!mlx5_chains_prios_supported(esw_chains(esw)) ||
tmp.common.prio >= mlx5_chains_get_prio_range(esw_chains(esw)) ||
tmp.common.chain_index)
return -EOPNOTSUPP;
tmp.common.chain_index = mlx5_chains_get_nf_ft_chain(esw_chains(esw));
tmp.common.prio++;
err = mlx5e_rep_indr_offload(priv->netdev, &tmp, priv, flags);
memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
return err;
default:
return -EOPNOTSUPP;
}
}
static void mlx5e_rep_indr_block_unbind(void *cb_priv)
{
struct mlx5e_rep_indr_block_priv *indr_priv = cb_priv;
list_del(&indr_priv->list);
kfree(indr_priv);
}
static LIST_HEAD(mlx5e_block_cb_list);
static int
mlx5e_rep_indr_setup_block(struct net_device *netdev, struct Qdisc *sch,
struct mlx5e_rep_priv *rpriv,
struct flow_block_offload *f,
flow_setup_cb_t *setup_cb,
void *data,
void (*cleanup)(struct flow_block_cb *block_cb))
{
struct mlx5e_priv *priv = netdev_priv(rpriv->netdev);
struct mlx5e_rep_indr_block_priv *indr_priv;
struct flow_block_cb *block_cb;
if (!mlx5e_tc_tun_device_to_offload(priv, netdev) &&
!(is_vlan_dev(netdev) && vlan_dev_real_dev(netdev) == rpriv->netdev))
return -EOPNOTSUPP;
if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
return -EOPNOTSUPP;
f->unlocked_driver_cb = true;
f->driver_block_list = &mlx5e_block_cb_list;
switch (f->command) {
case FLOW_BLOCK_BIND:
indr_priv = mlx5e_rep_indr_block_priv_lookup(rpriv, netdev);
if (indr_priv)
return -EEXIST;
indr_priv = kmalloc(sizeof(*indr_priv), GFP_KERNEL);
if (!indr_priv)
return -ENOMEM;
indr_priv->netdev = netdev;
indr_priv->rpriv = rpriv;
list_add(&indr_priv->list,
&rpriv->uplink_priv.tc_indr_block_priv_list);
block_cb = flow_indr_block_cb_alloc(setup_cb, indr_priv, indr_priv,
mlx5e_rep_indr_block_unbind,
f, netdev, sch, data, rpriv,
cleanup);
if (IS_ERR(block_cb)) {
list_del(&indr_priv->list);
kfree(indr_priv);
return PTR_ERR(block_cb);
}
flow_block_cb_add(block_cb, f);
list_add_tail(&block_cb->driver_list, &mlx5e_block_cb_list);
return 0;
case FLOW_BLOCK_UNBIND:
indr_priv = mlx5e_rep_indr_block_priv_lookup(rpriv, netdev);
if (!indr_priv)
return -ENOENT;
block_cb = flow_block_cb_lookup(f->block, setup_cb, indr_priv);
if (!block_cb)
return -ENOENT;
flow_indr_block_cb_remove(block_cb, f);
list_del(&block_cb->driver_list);
return 0;
default:
return -EOPNOTSUPP;
}
return 0;
}
static
int mlx5e_rep_indr_setup_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
enum tc_setup_type type, void *type_data,
void *data,
void (*cleanup)(struct flow_block_cb *block_cb))
{
switch (type) {
case TC_SETUP_BLOCK:
return mlx5e_rep_indr_setup_block(netdev, sch, cb_priv, type_data,
mlx5e_rep_indr_setup_tc_cb,
data, cleanup);
case TC_SETUP_FT:
return mlx5e_rep_indr_setup_block(netdev, sch, cb_priv, type_data,
mlx5e_rep_indr_setup_ft_cb,
data, cleanup);
default:
return -EOPNOTSUPP;
}
}
int mlx5e_rep_tc_netdevice_event_register(struct mlx5e_rep_priv *rpriv)
{
struct mlx5_rep_uplink_priv *uplink_priv = &rpriv->uplink_priv;
/* init indirect block notifications */
INIT_LIST_HEAD(&uplink_priv->tc_indr_block_priv_list);
return flow_indr_dev_register(mlx5e_rep_indr_setup_cb, rpriv);
}
void mlx5e_rep_tc_netdevice_event_unregister(struct mlx5e_rep_priv *rpriv)
{
flow_indr_dev_unregister(mlx5e_rep_indr_setup_cb, rpriv,
mlx5e_rep_indr_block_unbind);
}
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
static bool mlx5e_restore_tunnel(struct mlx5e_priv *priv, struct sk_buff *skb,
struct mlx5e_tc_update_priv *tc_priv,
u32 tunnel_id)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct tunnel_match_enc_opts enc_opts = {};
struct mlx5_rep_uplink_priv *uplink_priv;
struct mlx5e_rep_priv *uplink_rpriv;
struct metadata_dst *tun_dst;
struct tunnel_match_key key;
u32 tun_id, enc_opts_id;
struct net_device *dev;
int err;
enc_opts_id = tunnel_id & ENC_OPTS_BITS_MASK;
tun_id = tunnel_id >> ENC_OPTS_BITS;
if (!tun_id)
return true;
uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
uplink_priv = &uplink_rpriv->uplink_priv;
err = mapping_find(uplink_priv->tunnel_mapping, tun_id, &key);
if (err) {
WARN_ON_ONCE(true);
netdev_dbg(priv->netdev,
"Couldn't find tunnel for tun_id: %d, err: %d\n",
tun_id, err);
return false;
}
if (enc_opts_id) {
err = mapping_find(uplink_priv->tunnel_enc_opts_mapping,
enc_opts_id, &enc_opts);
if (err) {
netdev_dbg(priv->netdev,
"Couldn't find tunnel (opts) for tun_id: %d, err: %d\n",
enc_opts_id, err);
return false;
}
}
if (key.enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
tun_dst = __ip_tun_set_dst(key.enc_ipv4.src, key.enc_ipv4.dst,
key.enc_ip.tos, key.enc_ip.ttl,
key.enc_tp.dst, TUNNEL_KEY,
key32_to_tunnel_id(key.enc_key_id.keyid),
enc_opts.key.len);
} else if (key.enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
tun_dst = __ipv6_tun_set_dst(&key.enc_ipv6.src, &key.enc_ipv6.dst,
key.enc_ip.tos, key.enc_ip.ttl,
key.enc_tp.dst, 0, TUNNEL_KEY,
key32_to_tunnel_id(key.enc_key_id.keyid),
enc_opts.key.len);
} else {
netdev_dbg(priv->netdev,
"Couldn't restore tunnel, unsupported addr_type: %d\n",
key.enc_control.addr_type);
return false;
}
if (!tun_dst) {
netdev_dbg(priv->netdev, "Couldn't restore tunnel, no tun_dst\n");
return false;
}
tun_dst->u.tun_info.key.tp_src = key.enc_tp.src;
if (enc_opts.key.len)
ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
enc_opts.key.data,
enc_opts.key.len,
enc_opts.key.dst_opt_type);
skb_dst_set(skb, (struct dst_entry *)tun_dst);
dev = dev_get_by_index(&init_net, key.filter_ifindex);
if (!dev) {
netdev_dbg(priv->netdev,
"Couldn't find tunnel device with ifindex: %d\n",
key.filter_ifindex);
return false;
}
/* Set tun_dev so we do dev_put() after datapath */
tc_priv->tun_dev = dev;
skb->dev = dev;
return true;
}
#endif /* CONFIG_NET_TC_SKB_EXT */
bool mlx5e_rep_tc_update_skb(struct mlx5_cqe64 *cqe,
struct sk_buff *skb,
struct mlx5e_tc_update_priv *tc_priv)
{
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
u32 reg_c0, reg_c1, tunnel_id, zone_restore_id;
struct mlx5_rep_uplink_priv *uplink_priv;
struct mlx5e_rep_priv *uplink_rpriv;
struct mlx5_mapped_obj mapped_obj;
struct tc_skb_ext *tc_skb_ext;
struct mlx5_eswitch *esw;
struct mlx5e_priv *priv;
int err;
reg_c0 = (be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK);
if (!reg_c0 || reg_c0 == MLX5_FS_DEFAULT_FLOW_TAG)
return true;
/* If reg_c0 is not equal to the default flow tag then skb->mark
* is not supported and must be reset back to 0.
*/
skb->mark = 0;
reg_c1 = be32_to_cpu(cqe->ft_metadata);
priv = netdev_priv(skb->dev);
esw = priv->mdev->priv.eswitch;
err = mapping_find(esw->offloads.reg_c0_obj_pool, reg_c0, &mapped_obj);
if (err) {
netdev_dbg(priv->netdev,
"Couldn't find mapped object for reg_c0: %d, err: %d\n",
reg_c0, err);
return false;
}
if (mapped_obj.type == MLX5_MAPPED_OBJ_CHAIN) {
if (mapped_obj.chain) {
tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
if (!tc_skb_ext) {
WARN_ON(1);
return false;
}
tc_skb_ext->chain = mapped_obj.chain;
zone_restore_id = reg_c1 & ESW_ZONE_ID_MASK;
uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
uplink_priv = &uplink_rpriv->uplink_priv;
if (!mlx5e_tc_ct_restore_flow(uplink_priv->ct_priv, skb,
zone_restore_id))
return false;
}
} else {
netdev_dbg(priv->netdev, "Invalid mapped object type: %d\n", mapped_obj.type);
return false;
}
tunnel_id = reg_c1 >> ESW_TUN_OFFSET;
return mlx5e_restore_tunnel(priv, skb, tc_priv, tunnel_id);
#endif /* CONFIG_NET_TC_SKB_EXT */
return true;
}
void mlx5_rep_tc_post_napi_receive(struct mlx5e_tc_update_priv *tc_priv)
{
if (tc_priv->tun_dev)
dev_put(tc_priv->tun_dev);
}
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