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kernel / pub / scm / linux / kernel / git / klassert / ipsec-next / e7739a60712a041516f74c8917a0b3e5f1e4f01e / . / drivers / net / ethernet / mellanox / mlx5 / core / en_tc.c
blob: 31cd02f1149939bf6d2126583a49c01a5f310b73 [file] [log] [blame]
/*
* 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/sch_generic.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/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
#include <net/tc_act/tc_pedit.h>
#include <net/tc_act/tc_csum.h>
#include <net/arp.h>
#include <net/ipv6_stubs.h>
#include "en.h"
#include "en_rep.h"
#include "en_tc.h"
#include "eswitch.h"
#include "fs_core.h"
#include "en/port.h"
#include "en/tc_tun.h"
#include "lib/devcom.h"
struct mlx5_nic_flow_attr {
u32 action;
u32 flow_tag;
u32 mod_hdr_id;
u32 hairpin_tirn;
u8 match_level;
struct mlx5_flow_table *hairpin_ft;
struct mlx5_fc *counter;
};
#define MLX5E_TC_FLOW_BASE (MLX5E_TC_LAST_EXPORTED_BIT + 1)
enum {
MLX5E_TC_FLOW_INGRESS = MLX5E_TC_INGRESS,
MLX5E_TC_FLOW_EGRESS = MLX5E_TC_EGRESS,
MLX5E_TC_FLOW_ESWITCH = MLX5E_TC_ESW_OFFLOAD,
MLX5E_TC_FLOW_NIC = MLX5E_TC_NIC_OFFLOAD,
MLX5E_TC_FLOW_OFFLOADED = BIT(MLX5E_TC_FLOW_BASE),
MLX5E_TC_FLOW_HAIRPIN = BIT(MLX5E_TC_FLOW_BASE + 1),
MLX5E_TC_FLOW_HAIRPIN_RSS = BIT(MLX5E_TC_FLOW_BASE + 2),
MLX5E_TC_FLOW_SLOW = BIT(MLX5E_TC_FLOW_BASE + 3),
MLX5E_TC_FLOW_DUP = BIT(MLX5E_TC_FLOW_BASE + 4),
MLX5E_TC_FLOW_NOT_READY = BIT(MLX5E_TC_FLOW_BASE + 5),
};
#define MLX5E_TC_MAX_SPLITS 1
/* Helper struct for accessing a struct containing list_head array.
* Containing struct
* |- Helper array
* [0] Helper item 0
* |- list_head item 0
* |- index (0)
* [1] Helper item 1
* |- list_head item 1
* |- index (1)
* To access the containing struct from one of the list_head items:
* 1. Get the helper item from the list_head item using
* helper item =
* container_of(list_head item, helper struct type, list_head field)
* 2. Get the contining struct from the helper item and its index in the array:
* containing struct =
* container_of(helper item, containing struct type, helper field[index])
*/
struct encap_flow_item {
struct list_head list;
int index;
};
struct mlx5e_tc_flow {
struct rhash_head node;
struct mlx5e_priv *priv;
u64 cookie;
u16 flags;
struct mlx5_flow_handle *rule[MLX5E_TC_MAX_SPLITS + 1];
/* Flow can be associated with multiple encap IDs.
* The number of encaps is bounded by the number of supported
* destinations.
*/
struct encap_flow_item encaps[MLX5_MAX_FLOW_FWD_VPORTS];
struct mlx5e_tc_flow *peer_flow;
struct list_head mod_hdr; /* flows sharing the same mod hdr ID */
struct list_head hairpin; /* flows sharing the same hairpin */
struct list_head peer; /* flows with peer flow */
struct list_head unready; /* flows not ready to be offloaded (e.g due to missing route) */
union {
struct mlx5_esw_flow_attr esw_attr[0];
struct mlx5_nic_flow_attr nic_attr[0];
};
};
struct mlx5e_tc_flow_parse_attr {
struct ip_tunnel_info tun_info[MLX5_MAX_FLOW_FWD_VPORTS];
struct net_device *filter_dev;
struct mlx5_flow_spec spec;
int num_mod_hdr_actions;
int max_mod_hdr_actions;
void *mod_hdr_actions;
int mirred_ifindex[MLX5_MAX_FLOW_FWD_VPORTS];
};
#define MLX5E_TC_TABLE_NUM_GROUPS 4
#define MLX5E_TC_TABLE_MAX_GROUP_SIZE BIT(16)
struct mlx5e_hairpin {
struct mlx5_hairpin *pair;
struct mlx5_core_dev *func_mdev;
struct mlx5e_priv *func_priv;
u32 tdn;
u32 tirn;
int num_channels;
struct mlx5e_rqt indir_rqt;
u32 indir_tirn[MLX5E_NUM_INDIR_TIRS];
struct mlx5e_ttc_table ttc;
};
struct mlx5e_hairpin_entry {
/* a node of a hash table which keeps all the hairpin entries */
struct hlist_node hairpin_hlist;
/* flows sharing the same hairpin */
struct list_head flows;
u16 peer_vhca_id;
u8 prio;
struct mlx5e_hairpin *hp;
};
struct mod_hdr_key {
int num_actions;
void *actions;
};
struct mlx5e_mod_hdr_entry {
/* a node of a hash table which keeps all the mod_hdr entries */
struct hlist_node mod_hdr_hlist;
/* flows sharing the same mod_hdr entry */
struct list_head flows;
struct mod_hdr_key key;
u32 mod_hdr_id;
};
#define MLX5_MH_ACT_SZ MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto)
static inline u32 hash_mod_hdr_info(struct mod_hdr_key *key)
{
return jhash(key->actions,
key->num_actions * MLX5_MH_ACT_SZ, 0);
}
static inline int cmp_mod_hdr_info(struct mod_hdr_key *a,
struct mod_hdr_key *b)
{
if (a->num_actions != b->num_actions)
return 1;
return memcmp(a->actions, b->actions, a->num_actions * MLX5_MH_ACT_SZ);
}
static int mlx5e_attach_mod_hdr(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5e_tc_flow_parse_attr *parse_attr)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
int num_actions, actions_size, namespace, err;
struct mlx5e_mod_hdr_entry *mh;
struct mod_hdr_key key;
bool found = false;
u32 hash_key;
num_actions = parse_attr->num_mod_hdr_actions;
actions_size = MLX5_MH_ACT_SZ * num_actions;
key.actions = parse_attr->mod_hdr_actions;
key.num_actions = num_actions;
hash_key = hash_mod_hdr_info(&key);
if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
namespace = MLX5_FLOW_NAMESPACE_FDB;
hash_for_each_possible(esw->offloads.mod_hdr_tbl, mh,
mod_hdr_hlist, hash_key) {
if (!cmp_mod_hdr_info(&mh->key, &key)) {
found = true;
break;
}
}
} else {
namespace = MLX5_FLOW_NAMESPACE_KERNEL;
hash_for_each_possible(priv->fs.tc.mod_hdr_tbl, mh,
mod_hdr_hlist, hash_key) {
if (!cmp_mod_hdr_info(&mh->key, &key)) {
found = true;
break;
}
}
}
if (found)
goto attach_flow;
mh = kzalloc(sizeof(*mh) + actions_size, GFP_KERNEL);
if (!mh)
return -ENOMEM;
mh->key.actions = (void *)mh + sizeof(*mh);
memcpy(mh->key.actions, key.actions, actions_size);
mh->key.num_actions = num_actions;
INIT_LIST_HEAD(&mh->flows);
err = mlx5_modify_header_alloc(priv->mdev, namespace,
mh->key.num_actions,
mh->key.actions,
&mh->mod_hdr_id);
if (err)
goto out_err;
if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
hash_add(esw->offloads.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
else
hash_add(priv->fs.tc.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
attach_flow:
list_add(&flow->mod_hdr, &mh->flows);
if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
flow->esw_attr->mod_hdr_id = mh->mod_hdr_id;
else
flow->nic_attr->mod_hdr_id = mh->mod_hdr_id;
return 0;
out_err:
kfree(mh);
return err;
}
static void mlx5e_detach_mod_hdr(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct list_head *next = flow->mod_hdr.next;
list_del(&flow->mod_hdr);
if (list_empty(next)) {
struct mlx5e_mod_hdr_entry *mh;
mh = list_entry(next, struct mlx5e_mod_hdr_entry, flows);
mlx5_modify_header_dealloc(priv->mdev, mh->mod_hdr_id);
hash_del(&mh->mod_hdr_hlist);
kfree(mh);
}
}
static
struct mlx5_core_dev *mlx5e_hairpin_get_mdev(struct net *net, int ifindex)
{
struct net_device *netdev;
struct mlx5e_priv *priv;
netdev = __dev_get_by_index(net, ifindex);
priv = netdev_priv(netdev);
return priv->mdev;
}
static int mlx5e_hairpin_create_transport(struct mlx5e_hairpin *hp)
{
u32 in[MLX5_ST_SZ_DW(create_tir_in)] = {0};
void *tirc;
int err;
err = mlx5_core_alloc_transport_domain(hp->func_mdev, &hp->tdn);
if (err)
goto alloc_tdn_err;
tirc = MLX5_ADDR_OF(create_tir_in, in, ctx);
MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_DIRECT);
MLX5_SET(tirc, tirc, inline_rqn, hp->pair->rqn[0]);
MLX5_SET(tirc, tirc, transport_domain, hp->tdn);
err = mlx5_core_create_tir(hp->func_mdev, in, MLX5_ST_SZ_BYTES(create_tir_in), &hp->tirn);
if (err)
goto create_tir_err;
return 0;
create_tir_err:
mlx5_core_dealloc_transport_domain(hp->func_mdev, hp->tdn);
alloc_tdn_err:
return err;
}
static void mlx5e_hairpin_destroy_transport(struct mlx5e_hairpin *hp)
{
mlx5_core_destroy_tir(hp->func_mdev, hp->tirn);
mlx5_core_dealloc_transport_domain(hp->func_mdev, hp->tdn);
}
static void mlx5e_hairpin_fill_rqt_rqns(struct mlx5e_hairpin *hp, void *rqtc)
{
u32 indirection_rqt[MLX5E_INDIR_RQT_SIZE], rqn;
struct mlx5e_priv *priv = hp->func_priv;
int i, ix, sz = MLX5E_INDIR_RQT_SIZE;
mlx5e_build_default_indir_rqt(indirection_rqt, sz,
hp->num_channels);
for (i = 0; i < sz; i++) {
ix = i;
if (priv->rss_params.hfunc == ETH_RSS_HASH_XOR)
ix = mlx5e_bits_invert(i, ilog2(sz));
ix = indirection_rqt[ix];
rqn = hp->pair->rqn[ix];
MLX5_SET(rqtc, rqtc, rq_num[i], rqn);
}
}
static int mlx5e_hairpin_create_indirect_rqt(struct mlx5e_hairpin *hp)
{
int inlen, err, sz = MLX5E_INDIR_RQT_SIZE;
struct mlx5e_priv *priv = hp->func_priv;
struct mlx5_core_dev *mdev = priv->mdev;
void *rqtc;
u32 *in;
inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + sizeof(u32) * sz;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);
MLX5_SET(rqtc, rqtc, rqt_actual_size, sz);
MLX5_SET(rqtc, rqtc, rqt_max_size, sz);
mlx5e_hairpin_fill_rqt_rqns(hp, rqtc);
err = mlx5_core_create_rqt(mdev, in, inlen, &hp->indir_rqt.rqtn);
if (!err)
hp->indir_rqt.enabled = true;
kvfree(in);
return err;
}
static int mlx5e_hairpin_create_indirect_tirs(struct mlx5e_hairpin *hp)
{
struct mlx5e_priv *priv = hp->func_priv;
u32 in[MLX5_ST_SZ_DW(create_tir_in)];
int tt, i, err;
void *tirc;
for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++) {
struct mlx5e_tirc_config ttconfig = mlx5e_tirc_get_default_config(tt);
memset(in, 0, MLX5_ST_SZ_BYTES(create_tir_in));
tirc = MLX5_ADDR_OF(create_tir_in, in, ctx);
MLX5_SET(tirc, tirc, transport_domain, hp->tdn);
MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_INDIRECT);
MLX5_SET(tirc, tirc, indirect_table, hp->indir_rqt.rqtn);
mlx5e_build_indir_tir_ctx_hash(&priv->rss_params, &ttconfig, tirc, false);
err = mlx5_core_create_tir(hp->func_mdev, in,
MLX5_ST_SZ_BYTES(create_tir_in), &hp->indir_tirn[tt]);
if (err) {
mlx5_core_warn(hp->func_mdev, "create indirect tirs failed, %d\n", err);
goto err_destroy_tirs;
}
}
return 0;
err_destroy_tirs:
for (i = 0; i < tt; i++)
mlx5_core_destroy_tir(hp->func_mdev, hp->indir_tirn[i]);
return err;
}
static void mlx5e_hairpin_destroy_indirect_tirs(struct mlx5e_hairpin *hp)
{
int tt;
for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
mlx5_core_destroy_tir(hp->func_mdev, hp->indir_tirn[tt]);
}
static void mlx5e_hairpin_set_ttc_params(struct mlx5e_hairpin *hp,
struct ttc_params *ttc_params)
{
struct mlx5_flow_table_attr *ft_attr = &ttc_params->ft_attr;
int tt;
memset(ttc_params, 0, sizeof(*ttc_params));
ttc_params->any_tt_tirn = hp->tirn;
for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
ttc_params->indir_tirn[tt] = hp->indir_tirn[tt];
ft_attr->max_fte = MLX5E_NUM_TT;
ft_attr->level = MLX5E_TC_TTC_FT_LEVEL;
ft_attr->prio = MLX5E_TC_PRIO;
}
static int mlx5e_hairpin_rss_init(struct mlx5e_hairpin *hp)
{
struct mlx5e_priv *priv = hp->func_priv;
struct ttc_params ttc_params;
int err;
err = mlx5e_hairpin_create_indirect_rqt(hp);
if (err)
return err;
err = mlx5e_hairpin_create_indirect_tirs(hp);
if (err)
goto err_create_indirect_tirs;
mlx5e_hairpin_set_ttc_params(hp, &ttc_params);
err = mlx5e_create_ttc_table(priv, &ttc_params, &hp->ttc);
if (err)
goto err_create_ttc_table;
netdev_dbg(priv->netdev, "add hairpin: using %d channels rss ttc table id %x\n",
hp->num_channels, hp->ttc.ft.t->id);
return 0;
err_create_ttc_table:
mlx5e_hairpin_destroy_indirect_tirs(hp);
err_create_indirect_tirs:
mlx5e_destroy_rqt(priv, &hp->indir_rqt);
return err;
}
static void mlx5e_hairpin_rss_cleanup(struct mlx5e_hairpin *hp)
{
struct mlx5e_priv *priv = hp->func_priv;
mlx5e_destroy_ttc_table(priv, &hp->ttc);
mlx5e_hairpin_destroy_indirect_tirs(hp);
mlx5e_destroy_rqt(priv, &hp->indir_rqt);
}
static struct mlx5e_hairpin *
mlx5e_hairpin_create(struct mlx5e_priv *priv, struct mlx5_hairpin_params *params,
int peer_ifindex)
{
struct mlx5_core_dev *func_mdev, *peer_mdev;
struct mlx5e_hairpin *hp;
struct mlx5_hairpin *pair;
int err;
hp = kzalloc(sizeof(*hp), GFP_KERNEL);
if (!hp)
return ERR_PTR(-ENOMEM);
func_mdev = priv->mdev;
peer_mdev = mlx5e_hairpin_get_mdev(dev_net(priv->netdev), peer_ifindex);
pair = mlx5_core_hairpin_create(func_mdev, peer_mdev, params);
if (IS_ERR(pair)) {
err = PTR_ERR(pair);
goto create_pair_err;
}
hp->pair = pair;
hp->func_mdev = func_mdev;
hp->func_priv = priv;
hp->num_channels = params->num_channels;
err = mlx5e_hairpin_create_transport(hp);
if (err)
goto create_transport_err;
if (hp->num_channels > 1) {
err = mlx5e_hairpin_rss_init(hp);
if (err)
goto rss_init_err;
}
return hp;
rss_init_err:
mlx5e_hairpin_destroy_transport(hp);
create_transport_err:
mlx5_core_hairpin_destroy(hp->pair);
create_pair_err:
kfree(hp);
return ERR_PTR(err);
}
static void mlx5e_hairpin_destroy(struct mlx5e_hairpin *hp)
{
if (hp->num_channels > 1)
mlx5e_hairpin_rss_cleanup(hp);
mlx5e_hairpin_destroy_transport(hp);
mlx5_core_hairpin_destroy(hp->pair);
kvfree(hp);
}
static inline u32 hash_hairpin_info(u16 peer_vhca_id, u8 prio)
{
return (peer_vhca_id << 16 | prio);
}
static struct mlx5e_hairpin_entry *mlx5e_hairpin_get(struct mlx5e_priv *priv,
u16 peer_vhca_id, u8 prio)
{
struct mlx5e_hairpin_entry *hpe;
u32 hash_key = hash_hairpin_info(peer_vhca_id, prio);
hash_for_each_possible(priv->fs.tc.hairpin_tbl, hpe,
hairpin_hlist, hash_key) {
if (hpe->peer_vhca_id == peer_vhca_id && hpe->prio == prio)
return hpe;
}
return NULL;
}
#define UNKNOWN_MATCH_PRIO 8
static int mlx5e_hairpin_get_prio(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec, u8 *match_prio,
struct netlink_ext_ack *extack)
{
void *headers_c, *headers_v;
u8 prio_val, prio_mask = 0;
bool vlan_present;
#ifdef CONFIG_MLX5_CORE_EN_DCB
if (priv->dcbx_dp.trust_state != MLX5_QPTS_TRUST_PCP) {
NL_SET_ERR_MSG_MOD(extack,
"only PCP trust state supported for hairpin");
return -EOPNOTSUPP;
}
#endif
headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, outer_headers);
headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, outer_headers);
vlan_present = MLX5_GET(fte_match_set_lyr_2_4, headers_v, cvlan_tag);
if (vlan_present) {
prio_mask = MLX5_GET(fte_match_set_lyr_2_4, headers_c, first_prio);
prio_val = MLX5_GET(fte_match_set_lyr_2_4, headers_v, first_prio);
}
if (!vlan_present || !prio_mask) {
prio_val = UNKNOWN_MATCH_PRIO;
} else if (prio_mask != 0x7) {
NL_SET_ERR_MSG_MOD(extack,
"masked priority match not supported for hairpin");
return -EOPNOTSUPP;
}
*match_prio = prio_val;
return 0;
}
static int mlx5e_hairpin_flow_add(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct netlink_ext_ack *extack)
{
int peer_ifindex = parse_attr->mirred_ifindex[0];
struct mlx5_hairpin_params params;
struct mlx5_core_dev *peer_mdev;
struct mlx5e_hairpin_entry *hpe;
struct mlx5e_hairpin *hp;
u64 link_speed64;
u32 link_speed;
u8 match_prio;
u16 peer_id;
int err;
peer_mdev = mlx5e_hairpin_get_mdev(dev_net(priv->netdev), peer_ifindex);
if (!MLX5_CAP_GEN(priv->mdev, hairpin) || !MLX5_CAP_GEN(peer_mdev, hairpin)) {
NL_SET_ERR_MSG_MOD(extack, "hairpin is not supported");
return -EOPNOTSUPP;
}
peer_id = MLX5_CAP_GEN(peer_mdev, vhca_id);
err = mlx5e_hairpin_get_prio(priv, &parse_attr->spec, &match_prio,
extack);
if (err)
return err;
hpe = mlx5e_hairpin_get(priv, peer_id, match_prio);
if (hpe)
goto attach_flow;
hpe = kzalloc(sizeof(*hpe), GFP_KERNEL);
if (!hpe)
return -ENOMEM;
INIT_LIST_HEAD(&hpe->flows);
hpe->peer_vhca_id = peer_id;
hpe->prio = match_prio;
params.log_data_size = 15;
params.log_data_size = min_t(u8, params.log_data_size,
MLX5_CAP_GEN(priv->mdev, log_max_hairpin_wq_data_sz));
params.log_data_size = max_t(u8, params.log_data_size,
MLX5_CAP_GEN(priv->mdev, log_min_hairpin_wq_data_sz));
params.log_num_packets = params.log_data_size -
MLX5_MPWRQ_MIN_LOG_STRIDE_SZ(priv->mdev);
params.log_num_packets = min_t(u8, params.log_num_packets,
MLX5_CAP_GEN(priv->mdev, log_max_hairpin_num_packets));
params.q_counter = priv->q_counter;
/* set hairpin pair per each 50Gbs share of the link */
mlx5e_port_max_linkspeed(priv->mdev, &link_speed);
link_speed = max_t(u32, link_speed, 50000);
link_speed64 = link_speed;
do_div(link_speed64, 50000);
params.num_channels = link_speed64;
hp = mlx5e_hairpin_create(priv, &params, peer_ifindex);
if (IS_ERR(hp)) {
err = PTR_ERR(hp);
goto create_hairpin_err;
}
netdev_dbg(priv->netdev, "add hairpin: tirn %x rqn %x peer %s sqn %x prio %d (log) data %d packets %d\n",
hp->tirn, hp->pair->rqn[0],
dev_name(hp->pair->peer_mdev->device),
hp->pair->sqn[0], match_prio, params.log_data_size, params.log_num_packets);
hpe->hp = hp;
hash_add(priv->fs.tc.hairpin_tbl, &hpe->hairpin_hlist,
hash_hairpin_info(peer_id, match_prio));
attach_flow:
if (hpe->hp->num_channels > 1) {
flow->flags |= MLX5E_TC_FLOW_HAIRPIN_RSS;
flow->nic_attr->hairpin_ft = hpe->hp->ttc.ft.t;
} else {
flow->nic_attr->hairpin_tirn = hpe->hp->tirn;
}
list_add(&flow->hairpin, &hpe->flows);
return 0;
create_hairpin_err:
kfree(hpe);
return err;
}
static void mlx5e_hairpin_flow_del(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct list_head *next = flow->hairpin.next;
list_del(&flow->hairpin);
/* no more hairpin flows for us, release the hairpin pair */
if (list_empty(next)) {
struct mlx5e_hairpin_entry *hpe;
hpe = list_entry(next, struct mlx5e_hairpin_entry, flows);
netdev_dbg(priv->netdev, "del hairpin: peer %s\n",
dev_name(hpe->hp->pair->peer_mdev->device));
mlx5e_hairpin_destroy(hpe->hp);
hash_del(&hpe->hairpin_hlist);
kfree(hpe);
}
}
static int
mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
struct mlx5_nic_flow_attr *attr = flow->nic_attr;
struct mlx5_core_dev *dev = priv->mdev;
struct mlx5_flow_destination dest[2] = {};
struct mlx5_flow_act flow_act = {
.action = attr->action,
.flow_tag = attr->flow_tag,
.reformat_id = 0,
.flags = FLOW_ACT_HAS_TAG | FLOW_ACT_NO_APPEND,
};
struct mlx5_fc *counter = NULL;
bool table_created = false;
int err, dest_ix = 0;
if (flow->flags & MLX5E_TC_FLOW_HAIRPIN) {
err = mlx5e_hairpin_flow_add(priv, flow, parse_attr, extack);
if (err) {
goto err_add_hairpin_flow;
}
if (flow->flags & MLX5E_TC_FLOW_HAIRPIN_RSS) {
dest[dest_ix].type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
dest[dest_ix].ft = attr->hairpin_ft;
} else {
dest[dest_ix].type = MLX5_FLOW_DESTINATION_TYPE_TIR;
dest[dest_ix].tir_num = attr->hairpin_tirn;
}
dest_ix++;
} else if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
dest[dest_ix].type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
dest[dest_ix].ft = priv->fs.vlan.ft.t;
dest_ix++;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
counter = mlx5_fc_create(dev, true);
if (IS_ERR(counter)) {
err = PTR_ERR(counter);
goto err_fc_create;
}
dest[dest_ix].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
dest[dest_ix].counter_id = mlx5_fc_id(counter);
dest_ix++;
attr->counter = counter;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
flow_act.modify_id = attr->mod_hdr_id;
kfree(parse_attr->mod_hdr_actions);
if (err)
goto err_create_mod_hdr_id;
}
if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
int tc_grp_size, tc_tbl_size;
u32 max_flow_counter;
max_flow_counter = (MLX5_CAP_GEN(dev, max_flow_counter_31_16) << 16) |
MLX5_CAP_GEN(dev, max_flow_counter_15_0);
tc_grp_size = min_t(int, max_flow_counter, MLX5E_TC_TABLE_MAX_GROUP_SIZE);
tc_tbl_size = min_t(int, tc_grp_size * MLX5E_TC_TABLE_NUM_GROUPS,
BIT(MLX5_CAP_FLOWTABLE_NIC_RX(dev, log_max_ft_size)));
priv->fs.tc.t =
mlx5_create_auto_grouped_flow_table(priv->fs.ns,
MLX5E_TC_PRIO,
tc_tbl_size,
MLX5E_TC_TABLE_NUM_GROUPS,
MLX5E_TC_FT_LEVEL, 0);
if (IS_ERR(priv->fs.tc.t)) {
NL_SET_ERR_MSG_MOD(extack,
"Failed to create tc offload table\n");
netdev_err(priv->netdev,
"Failed to create tc offload table\n");
err = PTR_ERR(priv->fs.tc.t);
goto err_create_ft;
}
table_created = true;
}
if (attr->match_level != MLX5_MATCH_NONE)
parse_attr->spec.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
flow->rule[0] = mlx5_add_flow_rules(priv->fs.tc.t, &parse_attr->spec,
&flow_act, dest, dest_ix);
if (IS_ERR(flow->rule[0])) {
err = PTR_ERR(flow->rule[0]);
goto err_add_rule;
}
return 0;
err_add_rule:
if (table_created) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
err_create_ft:
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5e_detach_mod_hdr(priv, flow);
err_create_mod_hdr_id:
mlx5_fc_destroy(dev, counter);
err_fc_create:
if (flow->flags & MLX5E_TC_FLOW_HAIRPIN)
mlx5e_hairpin_flow_del(priv, flow);
err_add_hairpin_flow:
return err;
}
static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct mlx5_nic_flow_attr *attr = flow->nic_attr;
struct mlx5_fc *counter = NULL;
counter = attr->counter;
mlx5_del_flow_rules(flow->rule[0]);
mlx5_fc_destroy(priv->mdev, counter);
if (!mlx5e_tc_num_filters(priv, MLX5E_TC_NIC_OFFLOAD) && priv->fs.tc.t) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5e_detach_mod_hdr(priv, flow);
if (flow->flags & MLX5E_TC_FLOW_HAIRPIN)
mlx5e_hairpin_flow_del(priv, flow);
}
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow, int out_index);
static int mlx5e_attach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct net_device *mirred_dev,
int out_index,
struct netlink_ext_ack *extack,
struct net_device **encap_dev,
bool *encap_valid);
static struct mlx5_flow_handle *
mlx5e_tc_offload_fdb_rules(struct mlx5_eswitch *esw,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr)
{
struct mlx5_flow_handle *rule;
rule = mlx5_eswitch_add_offloaded_rule(esw, spec, attr);
if (IS_ERR(rule))
return rule;
if (attr->split_count) {
flow->rule[1] = mlx5_eswitch_add_fwd_rule(esw, spec, attr);
if (IS_ERR(flow->rule[1])) {
mlx5_eswitch_del_offloaded_rule(esw, rule, attr);
return flow->rule[1];
}
}
flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
return rule;
}
static void
mlx5e_tc_unoffload_fdb_rules(struct mlx5_eswitch *esw,
struct mlx5e_tc_flow *flow,
struct mlx5_esw_flow_attr *attr)
{
flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
if (attr->split_count)
mlx5_eswitch_del_fwd_rule(esw, flow->rule[1], attr);
mlx5_eswitch_del_offloaded_rule(esw, flow->rule[0], attr);
}
static struct mlx5_flow_handle *
mlx5e_tc_offload_to_slow_path(struct mlx5_eswitch *esw,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *slow_attr)
{
struct mlx5_flow_handle *rule;
memcpy(slow_attr, flow->esw_attr, sizeof(*slow_attr));
slow_attr->action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
slow_attr->split_count = 0;
slow_attr->dest_chain = FDB_SLOW_PATH_CHAIN;
rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, slow_attr);
if (!IS_ERR(rule))
flow->flags |= MLX5E_TC_FLOW_SLOW;
return rule;
}
static void
mlx5e_tc_unoffload_from_slow_path(struct mlx5_eswitch *esw,
struct mlx5e_tc_flow *flow,
struct mlx5_esw_flow_attr *slow_attr)
{
memcpy(slow_attr, flow->esw_attr, sizeof(*slow_attr));
slow_attr->action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
slow_attr->split_count = 0;
slow_attr->dest_chain = FDB_SLOW_PATH_CHAIN;
mlx5e_tc_unoffload_fdb_rules(esw, flow, slow_attr);
flow->flags &= ~MLX5E_TC_FLOW_SLOW;
}
static void add_unready_flow(struct mlx5e_tc_flow *flow)
{
struct mlx5_rep_uplink_priv *uplink_priv;
struct mlx5e_rep_priv *rpriv;
struct mlx5_eswitch *esw;
esw = flow->priv->mdev->priv.eswitch;
rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
uplink_priv = &rpriv->uplink_priv;
flow->flags |= MLX5E_TC_FLOW_NOT_READY;
list_add_tail(&flow->unready, &uplink_priv->unready_flows);
}
static void remove_unready_flow(struct mlx5e_tc_flow *flow)
{
list_del(&flow->unready);
flow->flags &= ~MLX5E_TC_FLOW_NOT_READY;
}
static int
mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
u32 max_chain = mlx5_eswitch_get_chain_range(esw);
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
struct mlx5e_tc_flow_parse_attr *parse_attr = attr->parse_attr;
u16 max_prio = mlx5_eswitch_get_prio_range(esw);
struct net_device *out_dev, *encap_dev = NULL;
struct mlx5_fc *counter = NULL;
struct mlx5e_rep_priv *rpriv;
struct mlx5e_priv *out_priv;
bool encap_valid = true;
int err = 0;
int out_index;
if (!mlx5_eswitch_prios_supported(esw) && attr->prio != 1) {
NL_SET_ERR_MSG(extack, "E-switch priorities unsupported, upgrade FW");
return -EOPNOTSUPP;
}
if (attr->chain > max_chain) {
NL_SET_ERR_MSG(extack, "Requested chain is out of supported range");
err = -EOPNOTSUPP;
goto err_max_prio_chain;
}
if (attr->prio > max_prio) {
NL_SET_ERR_MSG(extack, "Requested priority is out of supported range");
err = -EOPNOTSUPP;
goto err_max_prio_chain;
}
for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++) {
int mirred_ifindex;
if (!(attr->dests[out_index].flags & MLX5_ESW_DEST_ENCAP))
continue;
mirred_ifindex = parse_attr->mirred_ifindex[out_index];
out_dev = __dev_get_by_index(dev_net(priv->netdev),
mirred_ifindex);
err = mlx5e_attach_encap(priv, flow, out_dev, out_index,
extack, &encap_dev, &encap_valid);
if (err)
goto err_attach_encap;
out_priv = netdev_priv(encap_dev);
rpriv = out_priv->ppriv;
attr->dests[out_index].rep = rpriv->rep;
attr->dests[out_index].mdev = out_priv->mdev;
}
err = mlx5_eswitch_add_vlan_action(esw, attr);
if (err)
goto err_add_vlan;
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
kfree(parse_attr->mod_hdr_actions);
if (err)
goto err_mod_hdr;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
counter = mlx5_fc_create(attr->counter_dev, true);
if (IS_ERR(counter)) {
err = PTR_ERR(counter);
goto err_create_counter;
}
attr->counter = counter;
}
/* we get here if one of the following takes place:
* (1) there's no error
* (2) there's an encap action and we don't have valid neigh
*/
if (!encap_valid) {
/* continue with goto slow path rule instead */
struct mlx5_esw_flow_attr slow_attr;
flow->rule[0] = mlx5e_tc_offload_to_slow_path(esw, flow, &parse_attr->spec, &slow_attr);
} else {
flow->rule[0] = mlx5e_tc_offload_fdb_rules(esw, flow, &parse_attr->spec, attr);
}
if (IS_ERR(flow->rule[0])) {
err = PTR_ERR(flow->rule[0]);
goto err_add_rule;
}
return 0;
err_add_rule:
mlx5_fc_destroy(attr->counter_dev, counter);
err_create_counter:
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5e_detach_mod_hdr(priv, flow);
err_mod_hdr:
mlx5_eswitch_del_vlan_action(esw, attr);
err_add_vlan:
for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++)
if (attr->dests[out_index].flags & MLX5_ESW_DEST_ENCAP)
mlx5e_detach_encap(priv, flow, out_index);
err_attach_encap:
err_max_prio_chain:
return err;
}
static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
struct mlx5_esw_flow_attr slow_attr;
int out_index;
if (flow->flags & MLX5E_TC_FLOW_NOT_READY) {
remove_unready_flow(flow);
kvfree(attr->parse_attr);
return;
}
if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
if (flow->flags & MLX5E_TC_FLOW_SLOW)
mlx5e_tc_unoffload_from_slow_path(esw, flow, &slow_attr);
else
mlx5e_tc_unoffload_fdb_rules(esw, flow, attr);
}
mlx5_eswitch_del_vlan_action(esw, attr);
for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++)
if (attr->dests[out_index].flags & MLX5_ESW_DEST_ENCAP)
mlx5e_detach_encap(priv, flow, out_index);
kvfree(attr->parse_attr);
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
mlx5e_detach_mod_hdr(priv, flow);
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT)
mlx5_fc_destroy(attr->counter_dev, attr->counter);
}
void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
struct mlx5e_encap_entry *e)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr slow_attr, *esw_attr;
struct mlx5_flow_handle *rule;
struct mlx5_flow_spec *spec;
struct encap_flow_item *efi;
struct mlx5e_tc_flow *flow;
int err;
err = mlx5_packet_reformat_alloc(priv->mdev,
e->reformat_type,
e->encap_size, e->encap_header,
MLX5_FLOW_NAMESPACE_FDB,
&e->encap_id);
if (err) {
mlx5_core_warn(priv->mdev, "Failed to offload cached encapsulation header, %d\n",
err);
return;
}
e->flags |= MLX5_ENCAP_ENTRY_VALID;
mlx5e_rep_queue_neigh_stats_work(priv);
list_for_each_entry(efi, &e->flows, list) {
bool all_flow_encaps_valid = true;
int i;
flow = container_of(efi, struct mlx5e_tc_flow, encaps[efi->index]);
esw_attr = flow->esw_attr;
spec = &esw_attr->parse_attr->spec;
esw_attr->dests[efi->index].encap_id = e->encap_id;
esw_attr->dests[efi->index].flags |= MLX5_ESW_DEST_ENCAP_VALID;
/* Flow can be associated with multiple encap entries.
* Before offloading the flow verify that all of them have
* a valid neighbour.
*/
for (i = 0; i < MLX5_MAX_FLOW_FWD_VPORTS; i++) {
if (!(esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP))
continue;
if (!(esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP_VALID)) {
all_flow_encaps_valid = false;
break;
}
}
/* Do not offload flows with unresolved neighbors */
if (!all_flow_encaps_valid)
continue;
/* update from slow path rule to encap rule */
rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, esw_attr);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
err);
continue;
}
mlx5e_tc_unoffload_from_slow_path(esw, flow, &slow_attr);
flow->flags |= MLX5E_TC_FLOW_OFFLOADED; /* was unset when slow path rule removed */
flow->rule[0] = rule;
}
}
void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
struct mlx5e_encap_entry *e)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr slow_attr;
struct mlx5_flow_handle *rule;
struct mlx5_flow_spec *spec;
struct encap_flow_item *efi;
struct mlx5e_tc_flow *flow;
int err;
list_for_each_entry(efi, &e->flows, list) {
flow = container_of(efi, struct mlx5e_tc_flow, encaps[efi->index]);
spec = &flow->esw_attr->parse_attr->spec;
/* update from encap rule to slow path rule */
rule = mlx5e_tc_offload_to_slow_path(esw, flow, spec, &slow_attr);
/* mark the flow's encap dest as non-valid */
flow->esw_attr->dests[efi->index].flags &= ~MLX5_ESW_DEST_ENCAP_VALID;
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
mlx5_core_warn(priv->mdev, "Failed to update slow path (encap) flow, %d\n",
err);
continue;
}
mlx5e_tc_unoffload_fdb_rules(esw, flow, flow->esw_attr);
flow->flags |= MLX5E_TC_FLOW_OFFLOADED; /* was unset when fast path rule removed */
flow->rule[0] = rule;
}
/* we know that the encap is valid */
e->flags &= ~MLX5_ENCAP_ENTRY_VALID;
mlx5_packet_reformat_dealloc(priv->mdev, e->encap_id);
}
static struct mlx5_fc *mlx5e_tc_get_counter(struct mlx5e_tc_flow *flow)
{
if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
return flow->esw_attr->counter;
else
return flow->nic_attr->counter;
}
void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
{
struct mlx5e_neigh *m_neigh = &nhe->m_neigh;
u64 bytes, packets, lastuse = 0;
struct mlx5e_tc_flow *flow;
struct mlx5e_encap_entry *e;
struct mlx5_fc *counter;
struct neigh_table *tbl;
bool neigh_used = false;
struct neighbour *n;
if (m_neigh->family == AF_INET)
tbl = &arp_tbl;
#if IS_ENABLED(CONFIG_IPV6)
else if (m_neigh->family == AF_INET6)
tbl = &nd_tbl;
#endif
else
return;
list_for_each_entry(e, &nhe->encap_list, encap_list) {
struct encap_flow_item *efi;
if (!(e->flags & MLX5_ENCAP_ENTRY_VALID))
continue;
list_for_each_entry(efi, &e->flows, list) {
flow = container_of(efi, struct mlx5e_tc_flow,
encaps[efi->index]);
if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
counter = mlx5e_tc_get_counter(flow);
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
if (time_after((unsigned long)lastuse, nhe->reported_lastuse)) {
neigh_used = true;
break;
}
}
}
if (neigh_used)
break;
}
if (neigh_used) {
nhe->reported_lastuse = jiffies;
/* find the relevant neigh according to the cached device and
* dst ip pair
*/
n = neigh_lookup(tbl, &m_neigh->dst_ip, m_neigh->dev);
if (!n)
return;
neigh_event_send(n, NULL);
neigh_release(n);
}
}
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow, int out_index)
{
struct list_head *next = flow->encaps[out_index].list.next;
list_del(&flow->encaps[out_index].list);
if (list_empty(next)) {
struct mlx5e_encap_entry *e;
e = list_entry(next, struct mlx5e_encap_entry, flows);
mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
if (e->flags & MLX5_ENCAP_ENTRY_VALID)
mlx5_packet_reformat_dealloc(priv->mdev, e->encap_id);
hash_del_rcu(&e->encap_hlist);
kfree(e->encap_header);
kfree(e);
}
}
static void __mlx5e_tc_del_fdb_peer_flow(struct mlx5e_tc_flow *flow)
{
struct mlx5_eswitch *esw = flow->priv->mdev->priv.eswitch;
if (!(flow->flags & MLX5E_TC_FLOW_ESWITCH) ||
!(flow->flags & MLX5E_TC_FLOW_DUP))
return;
mutex_lock(&esw->offloads.peer_mutex);
list_del(&flow->peer);
mutex_unlock(&esw->offloads.peer_mutex);
flow->flags &= ~MLX5E_TC_FLOW_DUP;
mlx5e_tc_del_fdb_flow(flow->peer_flow->priv, flow->peer_flow);
kvfree(flow->peer_flow);
flow->peer_flow = NULL;
}
static void mlx5e_tc_del_fdb_peer_flow(struct mlx5e_tc_flow *flow)
{
struct mlx5_core_dev *dev = flow->priv->mdev;
struct mlx5_devcom *devcom = dev->priv.devcom;
struct mlx5_eswitch *peer_esw;
peer_esw = mlx5_devcom_get_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
if (!peer_esw)
return;
__mlx5e_tc_del_fdb_peer_flow(flow);
mlx5_devcom_release_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
}
static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
mlx5e_tc_del_fdb_peer_flow(flow);
mlx5e_tc_del_fdb_flow(priv, flow);
} else {
mlx5e_tc_del_nic_flow(priv, flow);
}
}
static int parse_tunnel_attr(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f,
struct net_device *filter_dev, u8 *match_level)
{
struct netlink_ext_ack *extack = f->common.extack;
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);
struct flow_rule *rule = tc_cls_flower_offload_flow_rule(f);
struct flow_match_control enc_control;
int err;
err = mlx5e_tc_tun_parse(filter_dev, priv, spec, f,
headers_c, headers_v, match_level);
if (err) {
NL_SET_ERR_MSG_MOD(extack,
"failed to parse tunnel attributes");
return err;
}
flow_rule_match_enc_control(rule, &enc_control);
if (enc_control.key->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
struct flow_match_ipv4_addrs match;
flow_rule_match_enc_ipv4_addrs(rule, &match);
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv4_layout.ipv4,
ntohl(match.mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv4_layout.ipv4,
ntohl(match.key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
ntohl(match.mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
ntohl(match.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);
} else if (enc_control.key->addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
struct flow_match_ipv6_addrs match;
flow_rule_match_enc_ipv6_addrs(rule, &match);
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&match.mask->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&match.key->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&match.mask->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&match.key->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
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_IPV6);
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IP)) {
struct flow_match_ip match;
flow_rule_match_enc_ip(rule, &match);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn,
match.mask->tos & 0x3);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn,
match.key->tos & 0x3);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp,
match.mask->tos >> 2);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp,
match.key->tos >> 2);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit,
match.mask->ttl);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit,
match.key->ttl);
if (match.mask->ttl &&
!MLX5_CAP_ESW_FLOWTABLE_FDB
(priv->mdev,
ft_field_support.outer_ipv4_ttl)) {
NL_SET_ERR_MSG_MOD(extack,
"Matching on TTL is not supported");
return -EOPNOTSUPP;
}
}
/* 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 void *get_match_headers_criteria(u32 flags,
struct mlx5_flow_spec *spec)
{
return (flags & MLX5_FLOW_CONTEXT_ACTION_DECAP) ?
MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
inner_headers) :
MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
outer_headers);
}
static void *get_match_headers_value(u32 flags,
struct mlx5_flow_spec *spec)
{
return (flags & MLX5_FLOW_CONTEXT_ACTION_DECAP) ?
MLX5_ADDR_OF(fte_match_param, spec->match_value,
inner_headers) :
MLX5_ADDR_OF(fte_match_param, spec->match_value,
outer_headers);
}
static int __parse_cls_flower(struct mlx5e_priv *priv,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f,
struct net_device *filter_dev,
u8 *match_level, u8 *tunnel_match_level)
{
struct netlink_ext_ack *extack = f->common.extack;
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);
struct flow_rule *rule = tc_cls_flower_offload_flow_rule(f);
struct flow_dissector *dissector = rule->match.dissector;
u16 addr_type = 0;
u8 ip_proto = 0;
*match_level = MLX5_MATCH_NONE;
if (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_CVLAN) |
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) |
BIT(FLOW_DISSECTOR_KEY_TCP) |
BIT(FLOW_DISSECTOR_KEY_IP) |
BIT(FLOW_DISSECTOR_KEY_ENC_IP))) {
NL_SET_ERR_MSG_MOD(extack, "Unsupported key");
netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
dissector->used_keys);
return -EOPNOTSUPP;
}
if ((flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) &&
flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
struct flow_match_control match;
flow_rule_match_enc_control(rule, &match);
switch (match.key->addr_type) {
case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
if (parse_tunnel_attr(priv, spec, f, filter_dev, tunnel_match_level))
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 = get_match_headers_criteria(MLX5_FLOW_CONTEXT_ACTION_DECAP,
spec);
headers_v = get_match_headers_value(MLX5_FLOW_CONTEXT_ACTION_DECAP,
spec);
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;
flow_rule_match_basic(rule, &match);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
ntohs(match.mask->n_proto));
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
ntohs(match.key->n_proto));
if (match.mask->n_proto)
*match_level = MLX5_MATCH_L2;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN) ||
is_vlan_dev(filter_dev)) {
struct flow_dissector_key_vlan filter_dev_mask;
struct flow_dissector_key_vlan filter_dev_key;
struct flow_match_vlan match;
if (is_vlan_dev(filter_dev)) {
match.key = &filter_dev_key;
match.key->vlan_id = vlan_dev_vlan_id(filter_dev);
match.key->vlan_tpid = vlan_dev_vlan_proto(filter_dev);
match.key->vlan_priority = 0;
match.mask = &filter_dev_mask;
memset(match.mask, 0xff, sizeof(*match.mask));
match.mask->vlan_priority = 0;
} else {
flow_rule_match_vlan(rule, &match);
}
if (match.mask->vlan_id ||
match.mask->vlan_priority ||
match.mask->vlan_tpid) {
if (match.key->vlan_tpid == htons(ETH_P_8021AD)) {
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
svlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
svlan_tag, 1);
} else {
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
cvlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
cvlan_tag, 1);
}
MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_vid,
match.mask->vlan_id);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid,
match.key->vlan_id);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_prio,
match.mask->vlan_priority);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_prio,
match.key->vlan_priority);
*match_level = MLX5_MATCH_L2;
}
} else if (*match_level != MLX5_MATCH_NONE) {
MLX5_SET(fte_match_set_lyr_2_4, headers_c, svlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1);
*match_level = MLX5_MATCH_L2;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) {
struct flow_match_vlan match;
flow_rule_match_cvlan(rule, &match);
if (match.mask->vlan_id ||
match.mask->vlan_priority ||
match.mask->vlan_tpid) {
if (match.key->vlan_tpid == htons(ETH_P_8021AD)) {
MLX5_SET(fte_match_set_misc, misc_c,
outer_second_svlan_tag, 1);
MLX5_SET(fte_match_set_misc, misc_v,
outer_second_svlan_tag, 1);
} else {
MLX5_SET(fte_match_set_misc, misc_c,
outer_second_cvlan_tag, 1);
MLX5_SET(fte_match_set_misc, misc_v,
outer_second_cvlan_tag, 1);
}
MLX5_SET(fte_match_set_misc, misc_c, outer_second_vid,
match.mask->vlan_id);
MLX5_SET(fte_match_set_misc, misc_v, outer_second_vid,
match.key->vlan_id);
MLX5_SET(fte_match_set_misc, misc_c, outer_second_prio,
match.mask->vlan_priority);
MLX5_SET(fte_match_set_misc, misc_v, outer_second_prio,
match.key->vlan_priority);
*match_level = MLX5_MATCH_L2;
}
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_match_eth_addrs match;
flow_rule_match_eth_addrs(rule, &match);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dmac_47_16),
match.mask->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dmac_47_16),
match.key->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
smac_47_16),
match.mask->src);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
smac_47_16),
match.key->src);
if (!is_zero_ether_addr(match.mask->src) ||
!is_zero_ether_addr(match.mask->dst))
*match_level = MLX5_MATCH_L2;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_match_control match;
flow_rule_match_control(rule, &match);
addr_type = match.key->addr_type;
/* the HW doesn't support frag first/later */
if (match.mask->flags & FLOW_DIS_FIRST_FRAG)
return -EOPNOTSUPP;
if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,
match.key->flags & FLOW_DIS_IS_FRAGMENT);
/* the HW doesn't need L3 inline to match on frag=no */
if (!(match.key->flags & FLOW_DIS_IS_FRAGMENT))
*match_level = MLX5_MATCH_L2;
/* *** L2 attributes parsing up to here *** */
else
*match_level = MLX5_MATCH_L3;
}
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;
flow_rule_match_basic(rule, &match);
ip_proto = match.key->ip_proto;
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
match.mask->ip_proto);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
match.key->ip_proto);
if (match.mask->ip_proto)
*match_level = MLX5_MATCH_L3;
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
struct flow_match_ipv4_addrs match;
flow_rule_match_ipv4_addrs(rule, &match);
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv4_layout.ipv4),
&match.mask->src, sizeof(match.mask->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv4_layout.ipv4),
&match.key->src, sizeof(match.key->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
&match.mask->dst, sizeof(match.mask->dst));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
&match.key->dst, sizeof(match.key->dst));
if (match.mask->src || match.mask->dst)
*match_level = MLX5_MATCH_L3;
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
struct flow_match_ipv6_addrs match;
flow_rule_match_ipv6_addrs(rule, &match);
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&match.mask->src, sizeof(match.mask->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
src_ipv4_src_ipv6.ipv6_layout.ipv6),
&match.key->src, sizeof(match.key->src));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&match.mask->dst, sizeof(match.mask->dst));
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&match.key->dst, sizeof(match.key->dst));
if (ipv6_addr_type(&match.mask->src) != IPV6_ADDR_ANY ||
ipv6_addr_type(&match.mask->dst) != IPV6_ADDR_ANY)
*match_level = MLX5_MATCH_L3;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
struct flow_match_ip match;
flow_rule_match_ip(rule, &match);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn,
match.mask->tos & 0x3);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn,
match.key->tos & 0x3);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp,
match.mask->tos >> 2);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp,
match.key->tos >> 2);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit,
match.mask->ttl);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit,
match.key->ttl);
if (match.mask->ttl &&
!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
ft_field_support.outer_ipv4_ttl)) {
NL_SET_ERR_MSG_MOD(extack,
"Matching on TTL is not supported");
return -EOPNOTSUPP;
}
if (match.mask->tos || match.mask->ttl)
*match_level = MLX5_MATCH_L3;
}
/* *** L3 attributes parsing up to here *** */
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
struct flow_match_ports match;
flow_rule_match_ports(rule, &match);
switch (ip_proto) {
case IPPROTO_TCP:
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
tcp_sport, ntohs(match.mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
tcp_sport, ntohs(match.key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
tcp_dport, ntohs(match.mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
tcp_dport, ntohs(match.key->dst));
break;
case IPPROTO_UDP:
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
udp_sport, ntohs(match.mask->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
udp_sport, ntohs(match.key->src));
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
udp_dport, ntohs(match.mask->dst));
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
udp_dport, ntohs(match.key->dst));
break;
default:
NL_SET_ERR_MSG_MOD(extack,
"Only UDP and TCP transports are supported for L4 matching");
netdev_err(priv->netdev,
"Only UDP and TCP transport are supported\n");
return -EINVAL;
}
if (match.mask->src || match.mask->dst)
*match_level = MLX5_MATCH_L4;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP)) {
struct flow_match_tcp match;
flow_rule_match_tcp(rule, &match);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, tcp_flags,
ntohs(match.mask->flags));
MLX5_SET(fte_match_set_lyr_2_4, headers_v, tcp_flags,
ntohs(match.key->flags));
if (match.mask->flags)
*match_level = MLX5_MATCH_L4;
}
return 0;
}
static int parse_cls_flower(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct tc_cls_flower_offload *f,
struct net_device *filter_dev)
{
struct netlink_ext_ack *extack = f->common.extack;
struct mlx5_core_dev *dev = priv->mdev;
struct mlx5_eswitch *esw = dev->priv.eswitch;
struct mlx5e_rep_priv *rpriv = priv->ppriv;
u8 match_level, tunnel_match_level = MLX5_MATCH_NONE;
struct mlx5_eswitch_rep *rep;
int err;
err = __parse_cls_flower(priv, spec, f, filter_dev, &match_level, &tunnel_match_level);
if (!err && (flow->flags & MLX5E_TC_FLOW_ESWITCH)) {
rep = rpriv->rep;
if (rep->vport != MLX5_VPORT_UPLINK &&
(esw->offloads.inline_mode != MLX5_INLINE_MODE_NONE &&
esw->offloads.inline_mode < match_level)) {
NL_SET_ERR_MSG_MOD(extack,
"Flow is not offloaded due to min inline setting");
netdev_warn(priv->netdev,
"Flow is not offloaded due to min inline setting, required %d actual %d\n",
match_level, esw->offloads.inline_mode);
return -EOPNOTSUPP;
}
}
if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
flow->esw_attr->match_level = match_level;
flow->esw_attr->tunnel_match_level = tunnel_match_level;
} else {
flow->nic_attr->match_level = match_level;
}
return err;
}
struct pedit_headers {
struct ethhdr eth;
struct vlan_hdr vlan;
struct iphdr ip4;
struct ipv6hdr ip6;
struct tcphdr tcp;
struct udphdr udp;
};
struct pedit_headers_action {
struct pedit_headers vals;
struct pedit_headers masks;
u32 pedits;
};
static int pedit_header_offsets[] = {
[FLOW_ACT_MANGLE_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth),
[FLOW_ACT_MANGLE_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4),
[FLOW_ACT_MANGLE_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6),
[FLOW_ACT_MANGLE_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp),
[FLOW_ACT_MANGLE_HDR_TYPE_UDP] = offsetof(struct pedit_headers, udp),
};
#define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype])
static int set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset,
struct pedit_headers_action *hdrs)
{
u32 *curr_pmask, *curr_pval;
curr_pmask = (u32 *)(pedit_header(&hdrs->masks, hdr_type) + offset);
curr_pval = (u32 *)(pedit_header(&hdrs->vals, hdr_type) + offset);
if (*curr_pmask & mask) /* disallow acting twice on the same location */
goto out_err;
*curr_pmask |= mask;
*curr_pval |= (val & mask);
return 0;
out_err:
return -EOPNOTSUPP;
}
struct mlx5_fields {
u8 field;
u8 size;
u32 offset;
u32 match_offset;
};
#define OFFLOAD(fw_field, size, field, off, match_field) \
{MLX5_ACTION_IN_FIELD_OUT_ ## fw_field, size, \
offsetof(struct pedit_headers, field) + (off), \
MLX5_BYTE_OFF(fte_match_set_lyr_2_4, match_field)}
/* masked values are the same and there are no rewrites that do not have a
* match.
*/
#define SAME_VAL_MASK(type, valp, maskp, matchvalp, matchmaskp) ({ \
type matchmaskx = *(type *)(matchmaskp); \
type matchvalx = *(type *)(matchvalp); \
type maskx = *(type *)(maskp); \
type valx = *(type *)(valp); \
\
(valx & maskx) == (matchvalx & matchmaskx) && !(maskx & (maskx ^ \
matchmaskx)); \
})
static bool cmp_val_mask(void *valp, void *maskp, void *matchvalp,
void *matchmaskp, int size)
{
bool same = false;
switch (size) {
case sizeof(u8):
same = SAME_VAL_MASK(u8, valp, maskp, matchvalp, matchmaskp);
break;
case sizeof(u16):
same = SAME_VAL_MASK(u16, valp, maskp, matchvalp, matchmaskp);
break;
case sizeof(u32):
same = SAME_VAL_MASK(u32, valp, maskp, matchvalp, matchmaskp);
break;
}
return same;
}
static struct mlx5_fields fields[] = {
OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0, dmac_47_16),
OFFLOAD(DMAC_15_0, 2, eth.h_dest[4], 0, dmac_15_0),
OFFLOAD(SMAC_47_16, 4, eth.h_source[0], 0, smac_47_16),
OFFLOAD(SMAC_15_0, 2, eth.h_source[4], 0, smac_15_0),
OFFLOAD(ETHERTYPE, 2, eth.h_proto, 0, ethertype),
OFFLOAD(FIRST_VID, 2, vlan.h_vlan_TCI, 0, first_vid),
OFFLOAD(IP_TTL, 1, ip4.ttl, 0, ttl_hoplimit),
OFFLOAD(SIPV4, 4, ip4.saddr, 0, src_ipv4_src_ipv6.ipv4_layout.ipv4),
OFFLOAD(DIPV4, 4, ip4.daddr, 0, dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
OFFLOAD(SIPV6_127_96, 4, ip6.saddr.s6_addr32[0], 0,
src_ipv4_src_ipv6.ipv6_layout.ipv6[0]),
OFFLOAD(SIPV6_95_64, 4, ip6.saddr.s6_addr32[1], 0,
src_ipv4_src_ipv6.ipv6_layout.ipv6[4]),
OFFLOAD(SIPV6_63_32, 4, ip6.saddr.s6_addr32[2], 0,
src_ipv4_src_ipv6.ipv6_layout.ipv6[8]),
OFFLOAD(SIPV6_31_0, 4, ip6.saddr.s6_addr32[3], 0,
src_ipv4_src_ipv6.ipv6_layout.ipv6[12]),
OFFLOAD(DIPV6_127_96, 4, ip6.daddr.s6_addr32[0], 0,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6[0]),
OFFLOAD(DIPV6_95_64, 4, ip6.daddr.s6_addr32[1], 0,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6[4]),
OFFLOAD(DIPV6_63_32, 4, ip6.daddr.s6_addr32[2], 0,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6[8]),
OFFLOAD(DIPV6_31_0, 4, ip6.daddr.s6_addr32[3], 0,
dst_ipv4_dst_ipv6.ipv6_layout.ipv6[12]),
OFFLOAD(IPV6_HOPLIMIT, 1, ip6.hop_limit, 0, ttl_hoplimit),
OFFLOAD(TCP_SPORT, 2, tcp.source, 0, tcp_sport),
OFFLOAD(TCP_DPORT, 2, tcp.dest, 0, tcp_dport),
OFFLOAD(TCP_FLAGS, 1, tcp.ack_seq, 5, tcp_flags),
OFFLOAD(UDP_SPORT, 2, udp.source, 0, udp_sport),
OFFLOAD(UDP_DPORT, 2, udp.dest, 0, udp_dport),
};
/* On input attr->max_mod_hdr_actions tells how many HW actions can be parsed at
* max from the SW pedit action. On success, attr->num_mod_hdr_actions
* says how many HW actions were actually parsed.
*/
static int offload_pedit_fields(struct pedit_headers_action *hdrs,
struct mlx5e_tc_flow_parse_attr *parse_attr,
u32 *action_flags,
struct netlink_ext_ack *extack)
{
struct pedit_headers *set_masks, *add_masks, *set_vals, *add_vals;
void *headers_c = get_match_headers_criteria(*action_flags,
&parse_attr->spec);
void *headers_v = get_match_headers_value(*action_flags,
&parse_attr->spec);
int i, action_size, nactions, max_actions, first, last, next_z;
void *s_masks_p, *a_masks_p, *vals_p;
struct mlx5_fields *f;
u8 cmd, field_bsize;
u32 s_mask, a_mask;
unsigned long mask;
__be32 mask_be32;
__be16 mask_be16;
void *action;
set_masks = &hdrs[0].masks;
add_masks = &hdrs[1].masks;
set_vals = &hdrs[0].vals;
add_vals = &hdrs[1].vals;
action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
action = parse_attr->mod_hdr_actions +
parse_attr->num_mod_hdr_actions * action_size;
max_actions = parse_attr->max_mod_hdr_actions;
nactions = parse_attr->num_mod_hdr_actions;
for (i = 0; i < ARRAY_SIZE(fields); i++) {
bool skip;
f = &fields[i];
/* avoid seeing bits set from previous iterations */
s_mask = 0;
a_mask = 0;
s_masks_p = (void *)set_masks + f->offset;
a_masks_p = (void *)add_masks + f->offset;
memcpy(&s_mask, s_masks_p, f->size);
memcpy(&a_mask, a_masks_p, f->size);
if (!s_mask && !a_mask) /* nothing to offload here */
continue;
if (s_mask && a_mask) {
NL_SET_ERR_MSG_MOD(extack,
"can't set and add to the same HW field");
printk(KERN_WARNING "mlx5: can't set and add to the same HW field (%x)\n", f->field);
return -EOPNOTSUPP;
}
if (nactions == max_actions) {
NL_SET_ERR_MSG_MOD(extack,
"too many pedit actions, can't offload");
printk(KERN_WARNING "mlx5: parsed %d pedit actions, can't do more\n", nactions);
return -EOPNOTSUPP;
}
skip = false;
if (s_mask) {
void *match_mask = headers_c + f->match_offset;
void *match_val = headers_v + f->match_offset;
cmd = MLX5_ACTION_TYPE_SET;
mask = s_mask;
vals_p = (void *)set_vals + f->offset;
/* don't rewrite if we have a match on the same value */
if (cmp_val_mask(vals_p, s_masks_p, match_val,
match_mask, f->size))
skip = true;
/* clear to denote we consumed this field */
memset(s_masks_p, 0, f->size);
} else {
u32 zero = 0;
cmd = MLX5_ACTION_TYPE_ADD;
mask = a_mask;
vals_p = (void *)add_vals + f->offset;
/* add 0 is no change */
if (!memcmp(vals_p, &zero, f->size))
skip = true;
/* clear to denote we consumed this field */
memset(a_masks_p, 0, f->size);
}
if (skip)
continue;
field_bsize = f->size * BITS_PER_BYTE;
if (field_bsize == 32) {
mask_be32 = *(__be32 *)&mask;
mask = (__force unsigned long)cpu_to_le32(be32_to_cpu(mask_be32));
} else if (field_bsize == 16) {
mask_be16 = *(__be16 *)&mask;
mask = (__force unsigned long)cpu_to_le16(be16_to_cpu(mask_be16));
}
first = find_first_bit(&mask, field_bsize);
next_z = find_next_zero_bit(&mask, field_bsize, first);
last = find_last_bit(&mask, field_bsize);
if (first < next_z && next_z < last) {
NL_SET_ERR_MSG_MOD(extack,
"rewrite of few sub-fields isn't supported");
printk(KERN_WARNING "mlx5: rewrite of few sub-fields (mask %lx) isn't offloaded\n",
mask);
return -EOPNOTSUPP;
}
MLX5_SET(set_action_in, action, action_type, cmd);
MLX5_SET(set_action_in, action, field, f->field);
if (cmd == MLX5_ACTION_TYPE_SET) {
MLX5_SET(set_action_in, action, offset, first);
/* length is num of bits to be written, zero means length of 32 */
MLX5_SET(set_action_in, action, length, (last - first + 1));
}
if (field_bsize == 32)
MLX5_SET(set_action_in, action, data, ntohl(*(__be32 *)vals_p) >> first);
else if (field_bsize == 16)
MLX5_SET(set_action_in, action, data, ntohs(*(__be16 *)vals_p) >> first);
else if (field_bsize == 8)
MLX5_SET(set_action_in, action, data, *(u8 *)vals_p >> first);
action += action_size;
nactions++;
}
parse_attr->num_mod_hdr_actions = nactions;
return 0;
}
static int mlx5e_flow_namespace_max_modify_action(struct mlx5_core_dev *mdev,
int namespace)
{
if (namespace == MLX5_FLOW_NAMESPACE_FDB) /* FDB offloading */
return MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, max_modify_header_actions);
else /* namespace is MLX5_FLOW_NAMESPACE_KERNEL - NIC offloading */
return MLX5_CAP_FLOWTABLE_NIC_RX(mdev, max_modify_header_actions);
}
static int alloc_mod_hdr_actions(struct mlx5e_priv *priv,
struct pedit_headers_action *hdrs,
int namespace,
struct mlx5e_tc_flow_parse_attr *parse_attr)
{
int nkeys, action_size, max_actions;
nkeys = hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits +
hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits;
action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
max_actions = mlx5e_flow_namespace_max_modify_action(priv->mdev, namespace);
/* can get up to crazingly 16 HW actions in 32 bits pedit SW key */
max_actions = min(max_actions, nkeys * 16);
parse_attr->mod_hdr_actions = kcalloc(max_actions, action_size, GFP_KERNEL);
if (!parse_attr->mod_hdr_actions)
return -ENOMEM;
parse_attr->max_mod_hdr_actions = max_actions;
return 0;
}
static const struct pedit_headers zero_masks = {};
static int parse_tc_pedit_action(struct mlx5e_priv *priv,
const struct flow_action_entry *act, int namespace,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct pedit_headers_action *hdrs,
struct netlink_ext_ack *extack)
{
u8 cmd = (act->id == FLOW_ACTION_MANGLE) ? 0 : 1;
int err = -EOPNOTSUPP;
u32 mask, val, offset;
u8 htype;
htype = act->mangle.htype;
err = -EOPNOTSUPP; /* can't be all optimistic */
if (htype == FLOW_ACT_MANGLE_UNSPEC) {
NL_SET_ERR_MSG_MOD(extack, "legacy pedit isn't offloaded");
goto out_err;
}
if (!mlx5e_flow_namespace_max_modify_action(priv->mdev, namespace)) {
NL_SET_ERR_MSG_MOD(extack,
"The pedit offload action is not supported");
goto out_err;
}
mask = act->mangle.mask;
val = act->mangle.val;
offset = act->mangle.offset;
err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd]);
if (err)
goto out_err;
hdrs[cmd].pedits++;
return 0;
out_err:
return err;
}
static int alloc_tc_pedit_action(struct mlx5e_priv *priv, int namespace,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct pedit_headers_action *hdrs,
u32 *action_flags,
struct netlink_ext_ack *extack)
{
struct pedit_headers *cmd_masks;
int err;
u8 cmd;
if (!parse_attr->mod_hdr_actions) {
err = alloc_mod_hdr_actions(priv, hdrs, namespace, parse_attr);
if (err)
goto out_err;
}
err = offload_pedit_fields(hdrs, parse_attr, action_flags, extack);
if (err < 0)
goto out_dealloc_parsed_actions;
for (cmd = 0; cmd < __PEDIT_CMD_MAX; cmd++) {
cmd_masks = &hdrs[cmd].masks;
if (memcmp(cmd_masks, &zero_masks, sizeof(zero_masks))) {
NL_SET_ERR_MSG_MOD(extack,
"attempt to offload an unsupported field");
netdev_warn(priv->netdev, "attempt to offload an unsupported field (cmd %d)\n", cmd);
print_hex_dump(KERN_WARNING, "mask: ", DUMP_PREFIX_ADDRESS,
16, 1, cmd_masks, sizeof(zero_masks), true);
err = -EOPNOTSUPP;
goto out_dealloc_parsed_actions;
}
}
return 0;
out_dealloc_parsed_actions:
kfree(parse_attr->mod_hdr_actions);
out_err:
return err;
}
static bool csum_offload_supported(struct mlx5e_priv *priv,
u32 action,
u32 update_flags,
struct netlink_ext_ack *extack)
{
u32 prot_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR | TCA_CSUM_UPDATE_FLAG_TCP |
TCA_CSUM_UPDATE_FLAG_UDP;
/* The HW recalcs checksums only if re-writing headers */
if (!(action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)) {
NL_SET_ERR_MSG_MOD(extack,
"TC csum action is only offloaded with pedit");
netdev_warn(priv->netdev,
"TC csum action is only offloaded with pedit\n");
return false;
}
if (update_flags & ~prot_flags) {
NL_SET_ERR_MSG_MOD(extack,
"can't offload TC csum action for some header/s");
netdev_warn(priv->netdev,
"can't offload TC csum action for some header/s - flags %#x\n",
update_flags);
return false;
}
return true;
}
struct ip_ttl_word {
__u8 ttl;
__u8 protocol;
__sum16 check;
};
struct ipv6_hoplimit_word {
__be16 payload_len;
__u8 nexthdr;
__u8 hop_limit;
};
static bool is_action_keys_supported(const struct flow_action_entry *act)
{
u32 mask, offset;
u8 htype;
htype = act->mangle.htype;
offset = act->mangle.offset;
mask = ~act->mangle.mask;
/* For IPv4 & IPv6 header check 4 byte word,
* to determine that modified fields
* are NOT ttl & hop_limit only.
*/
if (htype == FLOW_ACT_MANGLE_HDR_TYPE_IP4) {
struct ip_ttl_word *ttl_word =
(struct ip_ttl_word *)&mask;
if (offset != offsetof(struct iphdr, ttl) ||
ttl_word->protocol ||
ttl_word->check) {
return true;
}
} else if (htype == FLOW_ACT_MANGLE_HDR_TYPE_IP6) {
struct ipv6_hoplimit_word *hoplimit_word =
(struct ipv6_hoplimit_word *)&mask;
if (offset != offsetof(struct ipv6hdr, payload_len) ||
hoplimit_word->payload_len ||
hoplimit_word->nexthdr) {
return true;
}
}
return false;
}
static bool modify_header_match_supported(struct mlx5_flow_spec *spec,
struct flow_action *flow_action,
u32 actions,
struct netlink_ext_ack *extack)
{
const struct flow_action_entry *act;
bool modify_ip_header;
void *headers_v;
u16 ethertype;
u8 ip_proto;
int i;
headers_v = get_match_headers_value(actions, spec);
ethertype = MLX5_GET(fte_match_set_lyr_2_4, headers_v, ethertype);
/* for non-IP we only re-write MACs, so we're okay */
if (ethertype != ETH_P_IP && ethertype != ETH_P_IPV6)
goto out_ok;
modify_ip_header = false;
flow_action_for_each(i, act, flow_action) {
if (act->id != FLOW_ACTION_MANGLE &&
act->id != FLOW_ACTION_ADD)
continue;
if (is_action_keys_supported(act)) {
modify_ip_header = true;
break;
}
}
ip_proto = MLX5_GET(fte_match_set_lyr_2_4, headers_v, ip_protocol);
if (modify_ip_header && ip_proto != IPPROTO_TCP &&
ip_proto != IPPROTO_UDP && ip_proto != IPPROTO_ICMP) {
NL_SET_ERR_MSG_MOD(extack,
"can't offload re-write of non TCP/UDP");
pr_info("can't offload re-write of ip proto %d\n", ip_proto);
return false;
}
out_ok:
return true;
}
static bool actions_match_supported(struct mlx5e_priv *priv,
struct flow_action *flow_action,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
u32 actions;
if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
actions = flow->esw_attr->action;
else
actions = flow->nic_attr->action;
if (flow->flags & MLX5E_TC_FLOW_EGRESS &&
!((actions & MLX5_FLOW_CONTEXT_ACTION_DECAP) ||
(actions & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP)))
return false;
if (actions & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
return modify_header_match_supported(&parse_attr->spec,
flow_action, actions,
extack);
return true;
}
static bool same_hw_devs(struct mlx5e_priv *priv, struct mlx5e_priv *peer_priv)
{
struct mlx5_core_dev *fmdev, *pmdev;
u64 fsystem_guid, psystem_guid;
fmdev = priv->mdev;
pmdev = peer_priv->mdev;
fsystem_guid = mlx5_query_nic_system_image_guid(fmdev);
psystem_guid = mlx5_query_nic_system_image_guid(pmdev);
return (fsystem_guid == psystem_guid);
}
static int add_vlan_rewrite_action(struct mlx5e_priv *priv, int namespace,
const struct flow_action_entry *act,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct pedit_headers_action *hdrs,
u32 *action, struct netlink_ext_ack *extack)
{
u16 mask16 = VLAN_VID_MASK;
u16 val16 = act->vlan.vid & VLAN_VID_MASK;
const struct flow_action_entry pedit_act = {
.id = FLOW_ACTION_MANGLE,
.mangle.htype = FLOW_ACT_MANGLE_HDR_TYPE_ETH,
.mangle.offset = offsetof(struct vlan_ethhdr, h_vlan_TCI),
.mangle.mask = ~(u32)be16_to_cpu(*(__be16 *)&mask16),
.mangle.val = (u32)be16_to_cpu(*(__be16 *)&val16),
};
u8 match_prio_mask, match_prio_val;
void *headers_c, *headers_v;
int err;
headers_c = get_match_headers_criteria(*action, &parse_attr->spec);
headers_v = get_match_headers_value(*action, &parse_attr->spec);
if (!(MLX5_GET(fte_match_set_lyr_2_4, headers_c, cvlan_tag) &&
MLX5_GET(fte_match_set_lyr_2_4, headers_v, cvlan_tag))) {
NL_SET_ERR_MSG_MOD(extack,
"VLAN rewrite action must have VLAN protocol match");
return -EOPNOTSUPP;
}
match_prio_mask = MLX5_GET(fte_match_set_lyr_2_4, headers_c, first_prio);
match_prio_val = MLX5_GET(fte_match_set_lyr_2_4, headers_v, first_prio);
if (act->vlan.prio != (match_prio_val & match_prio_mask)) {
NL_SET_ERR_MSG_MOD(extack,
"Changing VLAN prio is not supported");
return -EOPNOTSUPP;
}
err = parse_tc_pedit_action(priv, &pedit_act, namespace, parse_attr,
hdrs, NULL);
*action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
return err;
}
static int
add_vlan_prio_tag_rewrite_action(struct mlx5e_priv *priv,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct pedit_headers_action *hdrs,
u32 *action, struct netlink_ext_ack *extack)
{
const struct flow_action_entry prio_tag_act = {
.vlan.vid = 0,
.vlan.prio =
MLX5_GET(fte_match_set_lyr_2_4,
get_match_headers_value(*action,
&parse_attr->spec),
first_prio) &
MLX5_GET(fte_match_set_lyr_2_4,
get_match_headers_criteria(*action,
&parse_attr->spec),
first_prio),
};
return add_vlan_rewrite_action(priv, MLX5_FLOW_NAMESPACE_FDB,
&prio_tag_act, parse_attr, hdrs, action,
extack);
}
static int parse_tc_nic_actions(struct mlx5e_priv *priv,
struct flow_action *flow_action,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
struct mlx5_nic_flow_attr *attr = flow->nic_attr;
struct pedit_headers_action hdrs[2] = {};
const struct flow_action_entry *act;
u32 action = 0;
int err, i;
if (!flow_action_has_entries(flow_action))
return -EINVAL;
attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_DROP:
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;
break;
case FLOW_ACTION_MANGLE:
case FLOW_ACTION_ADD:
err = parse_tc_pedit_action(priv, act, MLX5_FLOW_NAMESPACE_KERNEL,
parse_attr, hdrs, extack);
if (err)
return err;
action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
break;
case FLOW_ACTION_VLAN_MANGLE:
err = add_vlan_rewrite_action(priv,
MLX5_FLOW_NAMESPACE_KERNEL,
act, parse_attr, hdrs,
&action, extack);
if (err)
return err;
break;
case FLOW_ACTION_CSUM:
if (csum_offload_supported(priv, action,
act->csum_flags,
extack))
break;
return -EOPNOTSUPP;
case FLOW_ACTION_REDIRECT: {
struct net_device *peer_dev = act->dev;
if (priv->netdev->netdev_ops == peer_dev->netdev_ops &&
same_hw_devs(priv, netdev_priv(peer_dev))) {
parse_attr->mirred_ifindex[0] = peer_dev->ifindex;
flow->flags |= MLX5E_TC_FLOW_HAIRPIN;
action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
} else {
NL_SET_ERR_MSG_MOD(extack,
"device is not on same HW, can't offload");
netdev_warn(priv->netdev, "device %s not on same HW, can't offload\n",
peer_dev->name);
return -EINVAL;
}
}
break;
case FLOW_ACTION_MARK: {
u32 mark = act->mark;
if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
NL_SET_ERR_MSG_MOD(extack,
"Bad flow mark - only 16 bit is supported");
return -EINVAL;
}
attr->flow_tag = mark;
action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
}
break;
default:
NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported");
return -EOPNOTSUPP;
}
}
if (hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits ||
hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits) {
err = alloc_tc_pedit_action(priv, MLX5_FLOW_NAMESPACE_KERNEL,
parse_attr, hdrs, &action, extack);
if (err)
return err;
/* in case all pedit actions are skipped, remove the MOD_HDR
* flag.
*/
if (parse_attr->num_mod_hdr_actions == 0) {
action &= ~MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
kfree(parse_attr->mod_hdr_actions);
}
}
attr->action = action;
if (!actions_match_supported(priv, flow_action, parse_attr, flow, extack))
return -EOPNOTSUPP;
return 0;
}
struct encap_key {
struct ip_tunnel_key *ip_tun_key;
int tunnel_type;
};
static inline int cmp_encap_info(struct encap_key *a,
struct encap_key *b)
{
return memcmp(a->ip_tun_key, b->ip_tun_key, sizeof(*a->ip_tun_key)) ||
a->tunnel_type != b->tunnel_type;
}
static inline int hash_encap_info(struct encap_key *key)
{
return jhash(key->ip_tun_key, sizeof(*key->ip_tun_key),
key->tunnel_type);
}
static bool is_merged_eswitch_dev(struct mlx5e_priv *priv,
struct net_device *peer_netdev)
{
struct mlx5e_priv *peer_priv;
peer_priv = netdev_priv(peer_netdev);
return (MLX5_CAP_ESW(priv->mdev, merged_eswitch) &&
mlx5e_eswitch_rep(priv->netdev) &&
mlx5e_eswitch_rep(peer_netdev) &&
same_hw_devs(priv, peer_priv));
}
static int mlx5e_attach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct net_device *mirred_dev,
int out_index,
struct netlink_ext_ack *extack,
struct net_device **encap_dev,
bool *encap_valid)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
struct mlx5e_tc_flow_parse_attr *parse_attr;
struct ip_tunnel_info *tun_info;
struct encap_key key, e_key;
struct mlx5e_encap_entry *e;
unsigned short family;
uintptr_t hash_key;
bool found = false;
int err = 0;
parse_attr = attr->parse_attr;
tun_info = &parse_attr->tun_info[out_index];
family = ip_tunnel_info_af(tun_info);
key.ip_tun_key = &tun_info->key;
key.tunnel_type = mlx5e_tc_tun_get_type(mirred_dev);
hash_key = hash_encap_info(&key);
hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
encap_hlist, hash_key) {
e_key.ip_tun_key = &e->tun_info.key;
e_key.tunnel_type = e->tunnel_type;
if (!cmp_encap_info(&e_key, &key)) {
found = true;
break;
}
}
/* must verify if encap is valid or not */
if (found)
goto attach_flow;
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (!e)
return -ENOMEM;
e->tun_info = *tun_info;
err = mlx5e_tc_tun_init_encap_attr(mirred_dev, priv, e, extack);
if (err)
goto out_err;
INIT_LIST_HEAD(&e->flows);
if (family == AF_INET)
err = mlx5e_tc_tun_create_header_ipv4(priv, mirred_dev, e);
else if (family == AF_INET6)
err = mlx5e_tc_tun_create_header_ipv6(priv, mirred_dev, e);
if (err)
goto out_err;
hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
attach_flow:
list_add(&flow->encaps[out_index].list, &e->flows);
flow->encaps[out_index].index = out_index;
*encap_dev = e->out_dev;
if (e->flags & MLX5_ENCAP_ENTRY_VALID) {
attr->dests[out_index].encap_id = e->encap_id;
attr->dests[out_index].flags |= MLX5_ESW_DEST_ENCAP_VALID;
*encap_valid = true;
} else {
*encap_valid = false;
}
return err;
out_err:
kfree(e);
return err;
}
static int parse_tc_vlan_action(struct mlx5e_priv *priv,
const struct flow_action_entry *act,
struct mlx5_esw_flow_attr *attr,
u32 *action)
{
u8 vlan_idx = attr->total_vlan;
if (vlan_idx >= MLX5_FS_VLAN_DEPTH)
return -EOPNOTSUPP;
switch (act->id) {
case FLOW_ACTION_VLAN_POP:
if (vlan_idx) {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev,
MLX5_FS_VLAN_DEPTH))
return -EOPNOTSUPP;
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP_2;
} else {
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
}
break;
case FLOW_ACTION_VLAN_PUSH:
attr->vlan_vid[vlan_idx] = act->vlan.vid;
attr->vlan_prio[vlan_idx] = act->vlan.prio;
attr->vlan_proto[vlan_idx] = act->vlan.proto;
if (!attr->vlan_proto[vlan_idx])
attr->vlan_proto[vlan_idx] = htons(ETH_P_8021Q);
if (vlan_idx) {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev,
MLX5_FS_VLAN_DEPTH))
return -EOPNOTSUPP;
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH_2;
} else {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, 1) &&
(act->vlan.proto != htons(ETH_P_8021Q) ||
act->vlan.prio))
return -EOPNOTSUPP;
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
}
break;
default:
return -EINVAL;
}
attr->total_vlan = vlan_idx + 1;
return 0;
}
static int add_vlan_push_action(struct mlx5e_priv *priv,
struct mlx5_esw_flow_attr *attr,
struct net_device **out_dev,
u32 *action)
{
struct net_device *vlan_dev = *out_dev;
struct flow_action_entry vlan_act = {
.id = FLOW_ACTION_VLAN_PUSH,
.vlan.vid = vlan_dev_vlan_id(vlan_dev),
.vlan.proto = vlan_dev_vlan_proto(vlan_dev),
.vlan.prio = 0,
};
int err;
err = parse_tc_vlan_action(priv, &vlan_act, attr, action);
if (err)
return err;
*out_dev = dev_get_by_index_rcu(dev_net(vlan_dev),
dev_get_iflink(vlan_dev));
if (is_vlan_dev(*out_dev))
err = add_vlan_push_action(priv, attr, out_dev, action);
return err;
}
static int add_vlan_pop_action(struct mlx5e_priv *priv,
struct mlx5_esw_flow_attr *attr,
u32 *action)
{
int nest_level = vlan_get_encap_level(attr->parse_attr->filter_dev);
struct flow_action_entry vlan_act = {
.id = FLOW_ACTION_VLAN_POP,
};
int err = 0;
while (nest_level--) {
err = parse_tc_vlan_action(priv, &vlan_act, attr, action);
if (err)
return err;
}
return err;
}
static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
struct flow_action *flow_action,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
struct pedit_headers_action hdrs[2] = {};
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
struct mlx5e_tc_flow_parse_attr *parse_attr = attr->parse_attr;
struct mlx5e_rep_priv *rpriv = priv->ppriv;
const struct ip_tunnel_info *info = NULL;
const struct flow_action_entry *act;
bool encap = false;
u32 action = 0;
int err, i;
if (!flow_action_has_entries(flow_action))
return -EINVAL;
attr->in_rep = rpriv->rep;
attr->in_mdev = priv->mdev;
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_DROP:
action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
break;
case FLOW_ACTION_MANGLE:
case FLOW_ACTION_ADD:
err = parse_tc_pedit_action(priv, act, MLX5_FLOW_NAMESPACE_FDB,
parse_attr, hdrs, extack);
if (err)
return err;
action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
attr->split_count = attr->out_count;
break;
case FLOW_ACTION_CSUM:
if (csum_offload_supported(priv, action,
act->csum_flags, extack))
break;
return -EOPNOTSUPP;
case FLOW_ACTION_REDIRECT:
case FLOW_ACTION_MIRRED: {
struct mlx5e_priv *out_priv;
struct net_device *out_dev;
out_dev = act->dev;
if (!out_dev) {
/* out_dev is NULL when filters with
* non-existing mirred device are replayed to
* the driver.
*/
return -EINVAL;
}
if (attr->out_count >= MLX5_MAX_FLOW_FWD_VPORTS) {
NL_SET_ERR_MSG_MOD(extack,
"can't support more output ports, can't offload forwarding");
pr_err("can't support more than %d output ports, can't offload forwarding\n",
attr->out_count);
return -EOPNOTSUPP;
}
action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
if (netdev_port_same_parent_id(priv->netdev,
out_dev) ||
is_merged_eswitch_dev(priv, out_dev)) {
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct net_device *uplink_dev = mlx5_eswitch_uplink_get_proto_dev(esw, REP_ETH);
struct net_device *uplink_upper = netdev_master_upper_dev_get(uplink_dev);
if (uplink_upper &&
netif_is_lag_master(uplink_upper) &&
uplink_upper == out_dev)
out_dev = uplink_dev;
if (is_vlan_dev(out_dev)) {
err = add_vlan_push_action(priv, attr,
&out_dev,
&action);
if (err)
return err;
}
if (is_vlan_dev(parse_attr->filter_dev)) {
err = add_vlan_pop_action(priv, attr,
&action);
if (err)
return err;
}
if (!mlx5e_eswitch_rep(out_dev))
return -EOPNOTSUPP;
out_priv = netdev_priv(out_dev);
rpriv = out_priv->ppriv;
attr->dests[attr->out_count].rep = rpriv->rep;
attr->dests[attr->out_count].mdev = out_priv->mdev;
attr->out_count++;
} else if (encap) {
parse_attr->mirred_ifindex[attr->out_count] =
out_dev->ifindex;
parse_attr->tun_info[attr->out_count] = *info;
encap = false;
attr->dests[attr->out_count].flags |=
MLX5_ESW_DEST_ENCAP;
attr->out_count++;
/* attr->dests[].rep is resolved when we
* handle encap
*/
} else if (parse_attr->filter_dev != priv->netdev) {
/* All mlx5 devices are called to configure
* high level device filters. Therefore, the
* *attempt* to install a filter on invalid
* eswitch should not trigger an explicit error
*/
return -EINVAL;
} else {
NL_SET_ERR_MSG_MOD(extack,
"devices are not on same switch HW, can't offload forwarding");
pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
priv->netdev->name, out_dev->name);
return -EINVAL;
}
}
break;
case FLOW_ACTION_TUNNEL_ENCAP:
info = act->tunnel;
if (info)
encap = true;
else
return -EOPNOTSUPP;
break;
case FLOW_ACTION_VLAN_PUSH:
case FLOW_ACTION_VLAN_POP:
if (act->id == FLOW_ACTION_VLAN_PUSH &&
(action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP)) {
/* Replace vlan pop+push with vlan modify */
action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
err = add_vlan_rewrite_action(priv,
MLX5_FLOW_NAMESPACE_FDB,
act, parse_attr, hdrs,
&action, extack);
} else {
err = parse_tc_vlan_action(priv, act, attr, &action);
}
if (err)
return err;
attr->split_count = attr->out_count;
break;
case FLOW_ACTION_VLAN_MANGLE:
err = add_vlan_rewrite_action(priv,
MLX5_FLOW_NAMESPACE_FDB,
act, parse_attr, hdrs,
&action, extack);
if (err)
return err;
attr->split_count = attr->out_count;
break;
case FLOW_ACTION_TUNNEL_DECAP:
action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
break;
case FLOW_ACTION_GOTO: {
u32 dest_chain = act->chain_index;
u32 max_chain = mlx5_eswitch_get_chain_range(esw);
if (dest_chain <= attr->chain) {
NL_SET_ERR_MSG(extack, "Goto earlier chain isn't supported");
return -EOPNOTSUPP;
}
if (dest_chain > max_chain) {
NL_SET_ERR_MSG(extack, "Requested destination chain is out of supported range");
return -EOPNOTSUPP;
}
action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
attr->dest_chain = dest_chain;
break;
}
default:
NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported");
return -EOPNOTSUPP;
}
}
if (MLX5_CAP_GEN(esw->dev, prio_tag_required) &&
action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) {
/* For prio tag mode, replace vlan pop with rewrite vlan prio
* tag rewrite.
*/
action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
err = add_vlan_prio_tag_rewrite_action(priv, parse_attr, hdrs,
&action, extack);
if (err)
return err;
}
if (hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits ||
hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits) {
err = alloc_tc_pedit_action(priv, MLX5_FLOW_NAMESPACE_FDB,
parse_attr, hdrs, &action, extack);
if (err)
return err;
/* in case all pedit actions are skipped, remove the MOD_HDR
* flag. we might have set split_count either by pedit or
* pop/push. if there is no pop/push either, reset it too.
*/
if (parse_attr->num_mod_hdr_actions == 0) {
action &= ~MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
kfree(parse_attr->mod_hdr_actions);
if (!((action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) ||
(action & MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH)))
attr->split_count = 0;
}
}
attr->action = action;
if (!actions_match_supported(priv, flow_action, parse_attr, flow, extack))
return -EOPNOTSUPP;
if (attr->dest_chain) {
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
NL_SET_ERR_MSG(extack, "Mirroring goto chain rules isn't supported");
return -EOPNOTSUPP;
}
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
}
if (attr->split_count > 0 && !mlx5_esw_has_fwd_fdb(priv->mdev)) {
NL_SET_ERR_MSG_MOD(extack,
"current firmware doesn't support split rule for port mirroring");
netdev_warn_once(priv->netdev, "current firmware doesn't support split rule for port mirroring\n");
return -EOPNOTSUPP;
}
return 0;
}
static void get_flags(int flags, u16 *flow_flags)
{
u16 __flow_flags = 0;
if (flags & MLX5E_TC_INGRESS)
__flow_flags |= MLX5E_TC_FLOW_INGRESS;
if (flags & MLX5E_TC_EGRESS)
__flow_flags |= MLX5E_TC_FLOW_EGRESS;
if (flags & MLX5E_TC_ESW_OFFLOAD)
__flow_flags |= MLX5E_TC_FLOW_ESWITCH;
if (flags & MLX5E_TC_NIC_OFFLOAD)
__flow_flags |= MLX5E_TC_FLOW_NIC;
*flow_flags = __flow_flags;
}
static const struct rhashtable_params tc_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,
};
static struct rhashtable *get_tc_ht(struct mlx5e_priv *priv, int flags)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5e_rep_priv *uplink_rpriv;
if (flags & MLX5E_TC_ESW_OFFLOAD) {
uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
return &uplink_rpriv->uplink_priv.tc_ht;
} else /* NIC offload */
return &priv->fs.tc.ht;
}
static bool is_peer_flow_needed(struct mlx5e_tc_flow *flow)
{
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
bool is_rep_ingress = attr->in_rep->vport != MLX5_VPORT_UPLINK &&
flow->flags & MLX5E_TC_FLOW_INGRESS;
bool act_is_encap = !!(attr->action &
MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT);
bool esw_paired = mlx5_devcom_is_paired(attr->in_mdev->priv.devcom,
MLX5_DEVCOM_ESW_OFFLOADS);
if (!esw_paired)
return false;
if ((mlx5_lag_is_sriov(attr->in_mdev) ||
mlx5_lag_is_multipath(attr->in_mdev)) &&
(is_rep_ingress || act_is_encap))
return true;
return false;
}
static int
mlx5e_alloc_flow(struct mlx5e_priv *priv, int attr_size,
struct tc_cls_flower_offload *f, u16 flow_flags,
struct mlx5e_tc_flow_parse_attr **__parse_attr,
struct mlx5e_tc_flow **__flow)
{
struct mlx5e_tc_flow_parse_attr *parse_attr;
struct mlx5e_tc_flow *flow;
int err;
flow = kzalloc(sizeof(*flow) + attr_size, GFP_KERNEL);
parse_attr = kvzalloc(sizeof(*parse_attr), GFP_KERNEL);
if (!parse_attr || !flow) {
err = -ENOMEM;
goto err_free;
}
flow->cookie = f->cookie;
flow->flags = flow_flags;
flow->priv = priv;
*__flow = flow;
*__parse_attr = parse_attr;
return 0;
err_free:
kfree(flow);
kvfree(parse_attr);
return err;
}
static void
mlx5e_flow_esw_attr_init(struct mlx5_esw_flow_attr *esw_attr,
struct mlx5e_priv *priv,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct tc_cls_flower_offload *f,
struct mlx5_eswitch_rep *in_rep,
struct mlx5_core_dev *in_mdev)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
esw_attr->parse_attr = parse_attr;
esw_attr->chain = f->common.chain_index;
esw_attr->prio = TC_H_MAJ(f->common.prio) >> 16;
esw_attr->in_rep = in_rep;
esw_attr->in_mdev = in_mdev;
if (MLX5_CAP_ESW(esw->dev, counter_eswitch_affinity) ==
MLX5_COUNTER_SOURCE_ESWITCH)
esw_attr->counter_dev = in_mdev;
else
esw_attr->counter_dev = priv->mdev;
}
static struct mlx5e_tc_flow *
__mlx5e_add_fdb_flow(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f,
u16 flow_flags,
struct net_device *filter_dev,
struct mlx5_eswitch_rep *in_rep,
struct mlx5_core_dev *in_mdev)
{
struct flow_rule *rule = tc_cls_flower_offload_flow_rule(f);
struct netlink_ext_ack *extack = f->common.extack;
struct mlx5e_tc_flow_parse_attr *parse_attr;
struct mlx5e_tc_flow *flow;
int attr_size, err;
flow_flags |= MLX5E_TC_FLOW_ESWITCH;
attr_size = sizeof(struct mlx5_esw_flow_attr);
err = mlx5e_alloc_flow(priv, attr_size, f, flow_flags,
&parse_attr, &flow);
if (err)
goto out;
parse_attr->filter_dev = filter_dev;
mlx5e_flow_esw_attr_init(flow->esw_attr,
priv, parse_attr,
f, in_rep, in_mdev);
err = parse_cls_flower(flow->priv, flow, &parse_attr->spec,
f, filter_dev);
if (err)
goto err_free;
err = parse_tc_fdb_actions(priv, &rule->action, flow, extack);
if (err)
goto err_free;
err = mlx5e_tc_add_fdb_flow(priv, flow, extack);
if (err) {
if (!(err == -ENETUNREACH && mlx5_lag_is_multipath(in_mdev)))
goto err_free;
add_unready_flow(flow);
}
return flow;
err_free:
kfree(flow);
kvfree(parse_attr);
out:
return ERR_PTR(err);
}
static int mlx5e_tc_add_fdb_peer_flow(struct tc_cls_flower_offload *f,
struct mlx5e_tc_flow *flow,
u16 flow_flags)
{
struct mlx5e_priv *priv = flow->priv, *peer_priv;
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch, *peer_esw;
struct mlx5_devcom *devcom = priv->mdev->priv.devcom;
struct mlx5e_tc_flow_parse_attr *parse_attr;
struct mlx5e_rep_priv *peer_urpriv;
struct mlx5e_tc_flow *peer_flow;
struct mlx5_core_dev *in_mdev;
int err = 0;
peer_esw = mlx5_devcom_get_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
if (!peer_esw)
return -ENODEV;
peer_urpriv = mlx5_eswitch_get_uplink_priv(peer_esw, REP_ETH);
peer_priv = netdev_priv(peer_urpriv->netdev);
/* in_mdev is assigned of which the packet originated from.
* So packets redirected to uplink use the same mdev of the
* original flow and packets redirected from uplink use the
* peer mdev.
*/
if (flow->esw_attr->in_rep->vport == MLX5_VPORT_UPLINK)
in_mdev = peer_priv->mdev;
else
in_mdev = priv->mdev;
parse_attr = flow->esw_attr->parse_attr;
peer_flow = __mlx5e_add_fdb_flow(peer_priv, f, flow_flags,
parse_attr->filter_dev,
flow->esw_attr->in_rep, in_mdev);
if (IS_ERR(peer_flow)) {
err = PTR_ERR(peer_flow);
goto out;
}
flow->peer_flow = peer_flow;
flow->flags |= MLX5E_TC_FLOW_DUP;
mutex_lock(&esw->offloads.peer_mutex);
list_add_tail(&flow->peer, &esw->offloads.peer_flows);
mutex_unlock(&esw->offloads.peer_mutex);
out:
mlx5_devcom_release_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
return err;
}
static int
mlx5e_add_fdb_flow(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f,
u16 flow_flags,
struct net_device *filter_dev,
struct mlx5e_tc_flow **__flow)
{
struct mlx5e_rep_priv *rpriv = priv->ppriv;
struct mlx5_eswitch_rep *in_rep = rpriv->rep;
struct mlx5_core_dev *in_mdev = priv->mdev;
struct mlx5e_tc_flow *flow;
int err;
flow = __mlx5e_add_fdb_flow(priv, f, flow_flags, filter_dev, in_rep,
in_mdev);
if (IS_ERR(flow))
return PTR_ERR(flow);
if (is_peer_flow_needed(flow)) {
err = mlx5e_tc_add_fdb_peer_flow(f, flow, flow_flags);
if (err) {
mlx5e_tc_del_fdb_flow(priv, flow);
goto out;
}
}
*__flow = flow;
return 0;
out:
return err;
}
static int
mlx5e_add_nic_flow(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f,
u16 flow_flags,
struct net_device *filter_dev,
struct mlx5e_tc_flow **__flow)
{
struct flow_rule *rule = tc_cls_flower_offload_flow_rule(f);
struct netlink_ext_ack *extack = f->common.extack;
struct mlx5e_tc_flow_parse_attr *parse_attr;
struct mlx5e_tc_flow *flow;
int attr_size, err;
/* multi-chain not supported for NIC rules */
if (!tc_cls_can_offload_and_chain0(priv->netdev, &f->common))
return -EOPNOTSUPP;
flow_flags |= MLX5E_TC_FLOW_NIC;
attr_size = sizeof(struct mlx5_nic_flow_attr);
err = mlx5e_alloc_flow(priv, attr_size, f, flow_flags,
&parse_attr, &flow);
if (err)
goto out;
parse_attr->filter_dev = filter_dev;
err = parse_cls_flower(flow->priv, flow, &parse_attr->spec,
f, filter_dev);
if (err)
goto err_free;
err = parse_tc_nic_actions(priv, &rule->action, parse_attr, flow, extack);
if (err)
goto err_free;
err = mlx5e_tc_add_nic_flow(priv, parse_attr, flow, extack);
if (err)
goto err_free;
flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
kvfree(parse_attr);
*__flow = flow;
return 0;
err_free:
kfree(flow);
kvfree(parse_attr);
out:
return err;
}
static int
mlx5e_tc_add_flow(struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f,
int flags,
struct net_device *filter_dev,
struct mlx5e_tc_flow **flow)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
u16 flow_flags;
int err;
get_flags(flags, &flow_flags);
if (!tc_can_offload_extack(priv->netdev, f->common.extack))
return -EOPNOTSUPP;
if (esw && esw->mode == SRIOV_OFFLOADS)
err = mlx5e_add_fdb_flow(priv, f, flow_flags,
filter_dev, flow);
else
err = mlx5e_add_nic_flow(priv, f, flow_flags,
filter_dev, flow);
return err;
}
int mlx5e_configure_flower(struct net_device *dev, struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f, int flags)
{
struct netlink_ext_ack *extack = f->common.extack;
struct rhashtable *tc_ht = get_tc_ht(priv, flags);
struct mlx5e_tc_flow *flow;
int err = 0;
flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params);
if (flow) {
NL_SET_ERR_MSG_MOD(extack,
"flow cookie already exists, ignoring");
netdev_warn_once(priv->netdev,
"flow cookie %lx already exists, ignoring\n",
f->cookie);
err = -EEXIST;
goto out;
}
err = mlx5e_tc_add_flow(priv, f, flags, dev, &flow);
if (err)
goto out;
err = rhashtable_insert_fast(tc_ht, &flow->node, tc_ht_params);
if (err)
goto err_free;
return 0;
err_free:
mlx5e_tc_del_flow(priv, flow);
kfree(flow);
out:
return err;
}
#define DIRECTION_MASK (MLX5E_TC_INGRESS | MLX5E_TC_EGRESS)
#define FLOW_DIRECTION_MASK (MLX5E_TC_FLOW_INGRESS | MLX5E_TC_FLOW_EGRESS)
static bool same_flow_direction(struct mlx5e_tc_flow *flow, int flags)
{
if ((flow->flags & FLOW_DIRECTION_MASK) == (flags & DIRECTION_MASK))
return true;
return false;
}
int mlx5e_delete_flower(struct net_device *dev, struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f, int flags)
{
struct rhashtable *tc_ht = get_tc_ht(priv, flags);
struct mlx5e_tc_flow *flow;
flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params);
if (!flow || !same_flow_direction(flow, flags))
return -EINVAL;
rhashtable_remove_fast(tc_ht, &flow->node, tc_ht_params);
mlx5e_tc_del_flow(priv, flow);
kfree(flow);
return 0;
}
int mlx5e_stats_flower(struct net_device *dev, struct mlx5e_priv *priv,
struct tc_cls_flower_offload *f, int flags)
{
struct mlx5_devcom *devcom = priv->mdev->priv.devcom;
struct rhashtable *tc_ht = get_tc_ht(priv, flags);
struct mlx5_eswitch *peer_esw;
struct mlx5e_tc_flow *flow;
struct mlx5_fc *counter;
u64 lastuse = 0;
u64 packets = 0;
u64 bytes = 0;
flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params);
if (!flow || !same_flow_direction(flow, flags))
return -EINVAL;
if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
counter = mlx5e_tc_get_counter(flow);
if (!counter)
return 0;
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
}
/* Under multipath it's possible for one rule to be currently
* un-offloaded while the other rule is offloaded.
*/
peer_esw = mlx5_devcom_get_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
if (!peer_esw)
goto out;
if ((flow->flags & MLX5E_TC_FLOW_DUP) &&
(flow->peer_flow->flags & MLX5E_TC_FLOW_OFFLOADED)) {
u64 bytes2;
u64 packets2;
u64 lastuse2;
counter = mlx5e_tc_get_counter(flow->peer_flow);
if (!counter)
goto no_peer_counter;
mlx5_fc_query_cached(counter, &bytes2, &packets2, &lastuse2);
bytes += bytes2;
packets += packets2;
lastuse = max_t(u64, lastuse, lastuse2);
}
no_peer_counter:
mlx5_devcom_release_peer_data(devcom, MLX5_DEVCOM_ESW_OFFLOADS);
out:
flow_stats_update(&f->stats, bytes, packets, lastuse);
return 0;
}
static void mlx5e_tc_hairpin_update_dead_peer(struct mlx5e_priv *priv,
struct mlx5e_priv *peer_priv)
{
struct mlx5_core_dev *peer_mdev = peer_priv->mdev;
struct mlx5e_hairpin_entry *hpe;
u16 peer_vhca_id;
int bkt;
if (!same_hw_devs(priv, peer_priv))
return;
peer_vhca_id = MLX5_CAP_GEN(peer_mdev, vhca_id);
hash_for_each(priv->fs.tc.hairpin_tbl, bkt, hpe, hairpin_hlist) {
if (hpe->peer_vhca_id == peer_vhca_id)
hpe->hp->pair->peer_gone = true;
}
}
static int mlx5e_tc_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
struct mlx5e_flow_steering *fs;
struct mlx5e_priv *peer_priv;
struct mlx5e_tc_table *tc;
struct mlx5e_priv *priv;
if (ndev->netdev_ops != &mlx5e_netdev_ops ||
event != NETDEV_UNREGISTER ||
ndev->reg_state == NETREG_REGISTERED)
return NOTIFY_DONE;
tc = container_of(this, struct mlx5e_tc_table, netdevice_nb);
fs = container_of(tc, struct mlx5e_flow_steering, tc);
priv = container_of(fs, struct mlx5e_priv, fs);
peer_priv = netdev_priv(ndev);
if (priv == peer_priv ||
!(priv->netdev->features & NETIF_F_HW_TC))
return NOTIFY_DONE;
mlx5e_tc_hairpin_update_dead_peer(priv, peer_priv);
return NOTIFY_DONE;
}
int mlx5e_tc_nic_init(struct mlx5e_priv *priv)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
int err;
hash_init(tc->mod_hdr_tbl);
hash_init(tc->hairpin_tbl);
err = rhashtable_init(&tc->ht, &tc_ht_params);
if (err)
return err;
tc->netdevice_nb.notifier_call = mlx5e_tc_netdev_event;
if (register_netdevice_notifier(&tc->netdevice_nb)) {
tc->netdevice_nb.notifier_call = NULL;
mlx5_core_warn(priv->mdev, "Failed to register netdev notifier\n");
}
return err;
}
static void _mlx5e_tc_del_flow(void *ptr, void *arg)
{
struct mlx5e_tc_flow *flow = ptr;
struct mlx5e_priv *priv = flow->priv;
mlx5e_tc_del_flow(priv, flow);
kfree(flow);
}
void mlx5e_tc_nic_cleanup(struct mlx5e_priv *priv)
{
struct mlx5e_tc_table *tc = &priv->fs.tc;
if (tc->netdevice_nb.notifier_call)
unregister_netdevice_notifier(&tc->netdevice_nb);
rhashtable_destroy(&tc->ht);
if (!IS_ERR_OR_NULL(tc->t)) {
mlx5_destroy_flow_table(tc->t);
tc->t = NULL;
}
}
int mlx5e_tc_esw_init(struct rhashtable *tc_ht)
{
return rhashtable_init(tc_ht, &tc_ht_params);
}
void mlx5e_tc_esw_cleanup(struct rhashtable *tc_ht)
{
rhashtable_free_and_destroy(tc_ht, _mlx5e_tc_del_flow, NULL);
}
int mlx5e_tc_num_filters(struct mlx5e_priv *priv, int flags)
{
struct rhashtable *tc_ht = get_tc_ht(priv, flags);
return atomic_read(&tc_ht->nelems);
}
void mlx5e_tc_clean_fdb_peer_flows(struct mlx5_eswitch *esw)
{
struct mlx5e_tc_flow *flow, *tmp;
list_for_each_entry_safe(flow, tmp, &esw->offloads.peer_flows, peer)
__mlx5e_tc_del_fdb_peer_flow(flow);
}
void mlx5e_tc_reoffload_flows_work(struct work_struct *work)
{
struct mlx5_rep_uplink_priv *rpriv =
container_of(work, struct mlx5_rep_uplink_priv,
reoffload_flows_work);
struct mlx5e_tc_flow *flow, *tmp;
rtnl_lock();
list_for_each_entry_safe(flow, tmp, &rpriv->unready_flows, unready) {
if (!mlx5e_tc_add_fdb_flow(flow->priv, flow, NULL))
remove_unready_flow(flow);
}
rtnl_unlock();
}