2199 lines
61 KiB
C
2199 lines
61 KiB
C
/*
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* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <net/flow_dissector.h>
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#include <net/sch_generic.h>
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#include <net/pkt_cls.h>
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#include <net/tc_act/tc_gact.h>
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#include <net/tc_act/tc_skbedit.h>
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#include <linux/mlx5/fs.h>
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#include <linux/mlx5/device.h>
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#include <linux/rhashtable.h>
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#include <net/switchdev.h>
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#include <net/tc_act/tc_mirred.h>
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#include <net/tc_act/tc_vlan.h>
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#include <net/tc_act/tc_tunnel_key.h>
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#include <net/tc_act/tc_pedit.h>
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#include <net/tc_act/tc_csum.h>
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#include <net/vxlan.h>
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#include <net/arp.h>
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#include "en.h"
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#include "en_rep.h"
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#include "en_tc.h"
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#include "eswitch.h"
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#include "vxlan.h"
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struct mlx5_nic_flow_attr {
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u32 action;
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u32 flow_tag;
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u32 mod_hdr_id;
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};
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enum {
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MLX5E_TC_FLOW_ESWITCH = BIT(0),
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MLX5E_TC_FLOW_NIC = BIT(1),
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MLX5E_TC_FLOW_OFFLOADED = BIT(2),
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};
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struct mlx5e_tc_flow {
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struct rhash_head node;
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u64 cookie;
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u8 flags;
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struct mlx5_flow_handle *rule;
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struct list_head encap; /* flows sharing the same encap ID */
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struct list_head mod_hdr; /* flows sharing the same mod hdr ID */
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union {
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struct mlx5_esw_flow_attr esw_attr[0];
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struct mlx5_nic_flow_attr nic_attr[0];
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};
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};
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struct mlx5e_tc_flow_parse_attr {
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struct ip_tunnel_info tun_info;
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struct mlx5_flow_spec spec;
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int num_mod_hdr_actions;
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void *mod_hdr_actions;
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int mirred_ifindex;
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};
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enum {
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MLX5_HEADER_TYPE_VXLAN = 0x0,
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MLX5_HEADER_TYPE_NVGRE = 0x1,
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};
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#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
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#define MLX5E_TC_TABLE_NUM_GROUPS 4
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struct mod_hdr_key {
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int num_actions;
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void *actions;
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};
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struct mlx5e_mod_hdr_entry {
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/* a node of a hash table which keeps all the mod_hdr entries */
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struct hlist_node mod_hdr_hlist;
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/* flows sharing the same mod_hdr entry */
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struct list_head flows;
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struct mod_hdr_key key;
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u32 mod_hdr_id;
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};
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#define MLX5_MH_ACT_SZ MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto)
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static inline u32 hash_mod_hdr_info(struct mod_hdr_key *key)
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{
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return jhash(key->actions,
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key->num_actions * MLX5_MH_ACT_SZ, 0);
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}
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static inline int cmp_mod_hdr_info(struct mod_hdr_key *a,
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struct mod_hdr_key *b)
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{
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if (a->num_actions != b->num_actions)
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return 1;
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return memcmp(a->actions, b->actions, a->num_actions * MLX5_MH_ACT_SZ);
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}
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static int mlx5e_attach_mod_hdr(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow *flow,
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struct mlx5e_tc_flow_parse_attr *parse_attr)
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{
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struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
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int num_actions, actions_size, namespace, err;
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struct mlx5e_mod_hdr_entry *mh;
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struct mod_hdr_key key;
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bool found = false;
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u32 hash_key;
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num_actions = parse_attr->num_mod_hdr_actions;
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actions_size = MLX5_MH_ACT_SZ * num_actions;
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key.actions = parse_attr->mod_hdr_actions;
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key.num_actions = num_actions;
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hash_key = hash_mod_hdr_info(&key);
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if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
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namespace = MLX5_FLOW_NAMESPACE_FDB;
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hash_for_each_possible(esw->offloads.mod_hdr_tbl, mh,
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mod_hdr_hlist, hash_key) {
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if (!cmp_mod_hdr_info(&mh->key, &key)) {
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found = true;
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break;
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}
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}
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} else {
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namespace = MLX5_FLOW_NAMESPACE_KERNEL;
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hash_for_each_possible(priv->fs.tc.mod_hdr_tbl, mh,
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mod_hdr_hlist, hash_key) {
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if (!cmp_mod_hdr_info(&mh->key, &key)) {
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found = true;
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break;
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}
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}
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}
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if (found)
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goto attach_flow;
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mh = kzalloc(sizeof(*mh) + actions_size, GFP_KERNEL);
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if (!mh)
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return -ENOMEM;
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mh->key.actions = (void *)mh + sizeof(*mh);
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memcpy(mh->key.actions, key.actions, actions_size);
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mh->key.num_actions = num_actions;
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INIT_LIST_HEAD(&mh->flows);
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err = mlx5_modify_header_alloc(priv->mdev, namespace,
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mh->key.num_actions,
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mh->key.actions,
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&mh->mod_hdr_id);
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if (err)
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goto out_err;
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if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
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hash_add(esw->offloads.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
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else
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hash_add(priv->fs.tc.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
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attach_flow:
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list_add(&flow->mod_hdr, &mh->flows);
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if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
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flow->esw_attr->mod_hdr_id = mh->mod_hdr_id;
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else
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flow->nic_attr->mod_hdr_id = mh->mod_hdr_id;
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return 0;
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out_err:
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kfree(mh);
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return err;
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}
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static void mlx5e_detach_mod_hdr(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow *flow)
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{
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struct list_head *next = flow->mod_hdr.next;
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list_del(&flow->mod_hdr);
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if (list_empty(next)) {
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struct mlx5e_mod_hdr_entry *mh;
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mh = list_entry(next, struct mlx5e_mod_hdr_entry, flows);
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mlx5_modify_header_dealloc(priv->mdev, mh->mod_hdr_id);
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hash_del(&mh->mod_hdr_hlist);
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kfree(mh);
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}
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}
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static struct mlx5_flow_handle *
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mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow_parse_attr *parse_attr,
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struct mlx5e_tc_flow *flow)
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{
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struct mlx5_nic_flow_attr *attr = flow->nic_attr;
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struct mlx5_core_dev *dev = priv->mdev;
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struct mlx5_flow_destination dest = {};
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struct mlx5_flow_act flow_act = {
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.action = attr->action,
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.flow_tag = attr->flow_tag,
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.encap_id = 0,
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};
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struct mlx5_fc *counter = NULL;
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struct mlx5_flow_handle *rule;
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bool table_created = false;
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int err;
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
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dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
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dest.ft = priv->fs.vlan.ft.t;
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} else if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
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counter = mlx5_fc_create(dev, true);
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if (IS_ERR(counter))
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return ERR_CAST(counter);
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dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
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dest.counter = counter;
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}
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
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err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
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flow_act.modify_id = attr->mod_hdr_id;
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kfree(parse_attr->mod_hdr_actions);
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if (err) {
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rule = ERR_PTR(err);
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goto err_create_mod_hdr_id;
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}
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}
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if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
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priv->fs.tc.t =
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mlx5_create_auto_grouped_flow_table(priv->fs.ns,
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MLX5E_TC_PRIO,
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MLX5E_TC_TABLE_NUM_ENTRIES,
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MLX5E_TC_TABLE_NUM_GROUPS,
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0, 0);
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if (IS_ERR(priv->fs.tc.t)) {
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netdev_err(priv->netdev,
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"Failed to create tc offload table\n");
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rule = ERR_CAST(priv->fs.tc.t);
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goto err_create_ft;
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}
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table_created = true;
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}
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parse_attr->spec.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
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rule = mlx5_add_flow_rules(priv->fs.tc.t, &parse_attr->spec,
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&flow_act, &dest, 1);
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if (IS_ERR(rule))
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goto err_add_rule;
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return rule;
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err_add_rule:
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if (table_created) {
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mlx5_destroy_flow_table(priv->fs.tc.t);
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priv->fs.tc.t = NULL;
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}
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err_create_ft:
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
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mlx5e_detach_mod_hdr(priv, flow);
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err_create_mod_hdr_id:
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mlx5_fc_destroy(dev, counter);
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return rule;
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}
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static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow *flow)
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{
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struct mlx5_nic_flow_attr *attr = flow->nic_attr;
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struct mlx5_fc *counter = NULL;
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counter = mlx5_flow_rule_counter(flow->rule);
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mlx5_del_flow_rules(flow->rule);
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mlx5_fc_destroy(priv->mdev, counter);
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if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
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mlx5_destroy_flow_table(priv->fs.tc.t);
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priv->fs.tc.t = NULL;
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}
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
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mlx5e_detach_mod_hdr(priv, flow);
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}
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static void mlx5e_detach_encap(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow *flow);
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static int mlx5e_attach_encap(struct mlx5e_priv *priv,
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struct ip_tunnel_info *tun_info,
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struct net_device *mirred_dev,
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struct net_device **encap_dev,
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struct mlx5e_tc_flow *flow);
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static struct mlx5_flow_handle *
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mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow_parse_attr *parse_attr,
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struct mlx5e_tc_flow *flow)
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{
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struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
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struct mlx5_esw_flow_attr *attr = flow->esw_attr;
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struct net_device *out_dev, *encap_dev = NULL;
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struct mlx5_flow_handle *rule = NULL;
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struct mlx5e_rep_priv *rpriv;
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struct mlx5e_priv *out_priv;
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int err;
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP) {
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out_dev = __dev_get_by_index(dev_net(priv->netdev),
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attr->parse_attr->mirred_ifindex);
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err = mlx5e_attach_encap(priv, &parse_attr->tun_info,
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out_dev, &encap_dev, flow);
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if (err) {
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rule = ERR_PTR(err);
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if (err != -EAGAIN)
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goto err_attach_encap;
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}
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out_priv = netdev_priv(encap_dev);
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rpriv = out_priv->ppriv;
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attr->out_rep = rpriv->rep;
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}
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err = mlx5_eswitch_add_vlan_action(esw, attr);
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if (err) {
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rule = ERR_PTR(err);
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goto err_add_vlan;
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}
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
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err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
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kfree(parse_attr->mod_hdr_actions);
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if (err) {
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rule = ERR_PTR(err);
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goto err_mod_hdr;
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}
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}
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/* we get here if (1) there's no error (rule being null) or when
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* (2) there's an encap action and we're on -EAGAIN (no valid neigh)
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*/
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if (rule != ERR_PTR(-EAGAIN)) {
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rule = mlx5_eswitch_add_offloaded_rule(esw, &parse_attr->spec, attr);
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if (IS_ERR(rule))
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goto err_add_rule;
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}
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return rule;
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err_add_rule:
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
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mlx5e_detach_mod_hdr(priv, flow);
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err_mod_hdr:
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mlx5_eswitch_del_vlan_action(esw, attr);
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err_add_vlan:
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP)
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mlx5e_detach_encap(priv, flow);
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err_attach_encap:
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return rule;
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}
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static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
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struct mlx5e_tc_flow *flow)
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{
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struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
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struct mlx5_esw_flow_attr *attr = flow->esw_attr;
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if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
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flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
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mlx5_eswitch_del_offloaded_rule(esw, flow->rule, attr);
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}
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mlx5_eswitch_del_vlan_action(esw, attr);
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|
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP) {
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mlx5e_detach_encap(priv, flow);
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kvfree(attr->parse_attr);
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}
|
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|
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if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
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mlx5e_detach_mod_hdr(priv, flow);
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}
|
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|
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void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
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struct mlx5e_encap_entry *e)
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{
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struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
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struct mlx5_esw_flow_attr *esw_attr;
|
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struct mlx5e_tc_flow *flow;
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int err;
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|
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err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
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e->encap_size, e->encap_header,
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&e->encap_id);
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if (err) {
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mlx5_core_warn(priv->mdev, "Failed to offload cached encapsulation header, %d\n",
|
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err);
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return;
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}
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e->flags |= MLX5_ENCAP_ENTRY_VALID;
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mlx5e_rep_queue_neigh_stats_work(priv);
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|
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list_for_each_entry(flow, &e->flows, encap) {
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esw_attr = flow->esw_attr;
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esw_attr->encap_id = e->encap_id;
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flow->rule = mlx5_eswitch_add_offloaded_rule(esw, &esw_attr->parse_attr->spec, esw_attr);
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if (IS_ERR(flow->rule)) {
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err = PTR_ERR(flow->rule);
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mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
|
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err);
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continue;
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}
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flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
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}
|
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}
|
|
|
|
void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
|
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struct mlx5e_encap_entry *e)
|
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{
|
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struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
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struct mlx5e_tc_flow *flow;
|
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|
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list_for_each_entry(flow, &e->flows, encap) {
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if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
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flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
|
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mlx5_eswitch_del_offloaded_rule(esw, flow->rule, flow->esw_attr);
|
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}
|
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}
|
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|
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if (e->flags & MLX5_ENCAP_ENTRY_VALID) {
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e->flags &= ~MLX5_ENCAP_ENTRY_VALID;
|
|
mlx5_encap_dealloc(priv->mdev, e->encap_id);
|
|
}
|
|
}
|
|
|
|
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 = ipv6_stub->nd_tbl;
|
|
#endif
|
|
else
|
|
return;
|
|
|
|
list_for_each_entry(e, &nhe->encap_list, encap_list) {
|
|
if (!(e->flags & MLX5_ENCAP_ENTRY_VALID))
|
|
continue;
|
|
list_for_each_entry(flow, &e->flows, encap) {
|
|
if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
|
|
counter = mlx5_flow_rule_counter(flow->rule);
|
|
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
|
|
if (time_after((unsigned long)lastuse, nhe->reported_lastuse)) {
|
|
neigh_used = true;
|
|
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) {
|
|
WARN(1, "The neighbour already freed\n");
|
|
return;
|
|
}
|
|
|
|
neigh_event_send(n, NULL);
|
|
neigh_release(n);
|
|
}
|
|
}
|
|
|
|
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
|
|
struct mlx5e_tc_flow *flow)
|
|
{
|
|
struct list_head *next = flow->encap.next;
|
|
|
|
list_del(&flow->encap);
|
|
if (list_empty(next)) {
|
|
struct 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_encap_dealloc(priv->mdev, e->encap_id);
|
|
|
|
hash_del_rcu(&e->encap_hlist);
|
|
kfree(e->encap_header);
|
|
kfree(e);
|
|
}
|
|
}
|
|
|
|
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_flow(priv, flow);
|
|
else
|
|
mlx5e_tc_del_nic_flow(priv, flow);
|
|
}
|
|
|
|
static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
|
|
outer_headers);
|
|
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
|
|
outer_headers);
|
|
void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
|
|
misc_parameters);
|
|
void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
|
|
misc_parameters);
|
|
|
|
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
|
|
struct flow_dissector_key_keyid *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_KEYID,
|
|
f->key);
|
|
struct flow_dissector_key_keyid *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_KEYID,
|
|
f->mask);
|
|
MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
|
|
be32_to_cpu(mask->keyid));
|
|
MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
|
|
be32_to_cpu(key->keyid));
|
|
}
|
|
}
|
|
|
|
static int parse_tunnel_attr(struct mlx5e_priv *priv,
|
|
struct mlx5_flow_spec *spec,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
|
|
outer_headers);
|
|
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
|
|
outer_headers);
|
|
|
|
struct flow_dissector_key_control *enc_control =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_CONTROL,
|
|
f->key);
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
|
|
struct flow_dissector_key_ports *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_PORTS,
|
|
f->key);
|
|
struct flow_dissector_key_ports *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_PORTS,
|
|
f->mask);
|
|
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
|
struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
|
|
struct mlx5e_priv *up_priv = netdev_priv(up_dev);
|
|
|
|
/* Full udp dst port must be given */
|
|
if (memchr_inv(&mask->dst, 0xff, sizeof(mask->dst)))
|
|
goto vxlan_match_offload_err;
|
|
|
|
if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->dst)) &&
|
|
MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
|
|
parse_vxlan_attr(spec, f);
|
|
else {
|
|
netdev_warn(priv->netdev,
|
|
"%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->dst));
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
udp_dport, ntohs(mask->dst));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
udp_dport, ntohs(key->dst));
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
udp_sport, ntohs(mask->src));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
udp_sport, ntohs(key->src));
|
|
} else { /* udp dst port must be given */
|
|
vxlan_match_offload_err:
|
|
netdev_warn(priv->netdev,
|
|
"IP tunnel decap offload supported only for vxlan, must set UDP dport\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
|
|
struct flow_dissector_key_ipv4_addrs *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
|
|
f->key);
|
|
struct flow_dissector_key_ipv4_addrs *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
|
|
f->mask);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
src_ipv4_src_ipv6.ipv4_layout.ipv4,
|
|
ntohl(mask->src));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
src_ipv4_src_ipv6.ipv4_layout.ipv4,
|
|
ntohl(key->src));
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
|
|
ntohl(mask->dst));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
|
|
ntohl(key->dst));
|
|
|
|
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IP);
|
|
} else if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
|
|
struct flow_dissector_key_ipv6_addrs *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
|
|
f->key);
|
|
struct flow_dissector_key_ipv6_addrs *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
|
|
f->mask);
|
|
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
src_ipv4_src_ipv6.ipv6_layout.ipv6),
|
|
&mask->src, 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),
|
|
&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),
|
|
&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),
|
|
&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);
|
|
}
|
|
|
|
/* Enforce DMAC when offloading incoming tunneled flows.
|
|
* Flow counters require a match on the DMAC.
|
|
*/
|
|
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_47_16);
|
|
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_15_0);
|
|
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
dmac_47_16), priv->netdev->dev_addr);
|
|
|
|
/* let software handle IP fragments */
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __parse_cls_flower(struct mlx5e_priv *priv,
|
|
struct mlx5_flow_spec *spec,
|
|
struct tc_cls_flower_offload *f,
|
|
u8 *min_inline)
|
|
{
|
|
void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
|
|
outer_headers);
|
|
void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
|
|
outer_headers);
|
|
u16 addr_type = 0;
|
|
u8 ip_proto = 0;
|
|
|
|
*min_inline = MLX5_INLINE_MODE_L2;
|
|
|
|
if (f->dissector->used_keys &
|
|
~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
|
|
BIT(FLOW_DISSECTOR_KEY_BASIC) |
|
|
BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
|
|
BIT(FLOW_DISSECTOR_KEY_VLAN) |
|
|
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
|
|
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
|
|
BIT(FLOW_DISSECTOR_KEY_PORTS) |
|
|
BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
|
|
BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) |
|
|
BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
|
|
BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) |
|
|
BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) |
|
|
BIT(FLOW_DISSECTOR_KEY_TCP) |
|
|
BIT(FLOW_DISSECTOR_KEY_IP))) {
|
|
netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
|
|
f->dissector->used_keys);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if ((dissector_uses_key(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
|
|
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
|
|
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) &&
|
|
dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
|
|
struct flow_dissector_key_control *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ENC_CONTROL,
|
|
f->key);
|
|
switch (key->addr_type) {
|
|
case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
|
|
case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
|
|
if (parse_tunnel_attr(priv, spec, f))
|
|
return -EOPNOTSUPP;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* In decap flow, header pointers should point to the inner
|
|
* headers, outer header were already set by parse_tunnel_attr
|
|
*/
|
|
headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
|
|
inner_headers);
|
|
headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
|
|
inner_headers);
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
|
|
struct flow_dissector_key_control *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_CONTROL,
|
|
f->key);
|
|
|
|
struct flow_dissector_key_control *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_CONTROL,
|
|
f->mask);
|
|
addr_type = key->addr_type;
|
|
|
|
if (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,
|
|
key->flags & FLOW_DIS_IS_FRAGMENT);
|
|
|
|
/* the HW doesn't need L3 inline to match on frag=no */
|
|
if (key->flags & FLOW_DIS_IS_FRAGMENT)
|
|
*min_inline = MLX5_INLINE_MODE_IP;
|
|
}
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
|
|
struct flow_dissector_key_basic *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_BASIC,
|
|
f->key);
|
|
struct flow_dissector_key_basic *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_BASIC,
|
|
f->mask);
|
|
ip_proto = key->ip_proto;
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
|
|
ntohs(mask->n_proto));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
|
|
ntohs(key->n_proto));
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
|
|
mask->ip_proto);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
|
|
key->ip_proto);
|
|
|
|
if (mask->ip_proto)
|
|
*min_inline = MLX5_INLINE_MODE_IP;
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
|
|
struct flow_dissector_key_eth_addrs *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ETH_ADDRS,
|
|
f->key);
|
|
struct flow_dissector_key_eth_addrs *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_ETH_ADDRS,
|
|
f->mask);
|
|
|
|
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
dmac_47_16),
|
|
mask->dst);
|
|
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
dmac_47_16),
|
|
key->dst);
|
|
|
|
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
smac_47_16),
|
|
mask->src);
|
|
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
smac_47_16),
|
|
key->src);
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
|
|
struct flow_dissector_key_vlan *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_VLAN,
|
|
f->key);
|
|
struct flow_dissector_key_vlan *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_VLAN,
|
|
f->mask);
|
|
if (mask->vlan_id || mask->vlan_priority) {
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, 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, mask->vlan_id);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid, key->vlan_id);
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_prio, mask->vlan_priority);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_prio, key->vlan_priority);
|
|
}
|
|
}
|
|
|
|
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
|
|
struct flow_dissector_key_ipv4_addrs *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
|
|
f->key);
|
|
struct flow_dissector_key_ipv4_addrs *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IPV4_ADDRS,
|
|
f->mask);
|
|
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
src_ipv4_src_ipv6.ipv4_layout.ipv4),
|
|
&mask->src, sizeof(mask->src));
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
src_ipv4_src_ipv6.ipv4_layout.ipv4),
|
|
&key->src, sizeof(key->src));
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
|
|
&mask->dst, sizeof(mask->dst));
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
|
|
&key->dst, sizeof(key->dst));
|
|
|
|
if (mask->src || mask->dst)
|
|
*min_inline = MLX5_INLINE_MODE_IP;
|
|
}
|
|
|
|
if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
|
|
struct flow_dissector_key_ipv6_addrs *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
|
|
f->key);
|
|
struct flow_dissector_key_ipv6_addrs *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IPV6_ADDRS,
|
|
f->mask);
|
|
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
src_ipv4_src_ipv6.ipv6_layout.ipv6),
|
|
&mask->src, sizeof(mask->src));
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
src_ipv4_src_ipv6.ipv6_layout.ipv6),
|
|
&key->src, sizeof(key->src));
|
|
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
|
|
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
|
|
&mask->dst, sizeof(mask->dst));
|
|
memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
|
|
dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
|
|
&key->dst, sizeof(key->dst));
|
|
|
|
if (ipv6_addr_type(&mask->src) != IPV6_ADDR_ANY ||
|
|
ipv6_addr_type(&mask->dst) != IPV6_ADDR_ANY)
|
|
*min_inline = MLX5_INLINE_MODE_IP;
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_IP)) {
|
|
struct flow_dissector_key_ip *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IP,
|
|
f->key);
|
|
struct flow_dissector_key_ip *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_IP,
|
|
f->mask);
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn, mask->tos & 0x3);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn, key->tos & 0x3);
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp, mask->tos >> 2);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp, key->tos >> 2);
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit, mask->ttl);
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit, key->ttl);
|
|
|
|
if (mask->ttl &&
|
|
!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
|
|
ft_field_support.outer_ipv4_ttl))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (mask->tos || mask->ttl)
|
|
*min_inline = MLX5_INLINE_MODE_IP;
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
|
|
struct flow_dissector_key_ports *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_PORTS,
|
|
f->key);
|
|
struct flow_dissector_key_ports *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_PORTS,
|
|
f->mask);
|
|
switch (ip_proto) {
|
|
case IPPROTO_TCP:
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
tcp_sport, ntohs(mask->src));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
tcp_sport, ntohs(key->src));
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
tcp_dport, ntohs(mask->dst));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
tcp_dport, ntohs(key->dst));
|
|
break;
|
|
|
|
case IPPROTO_UDP:
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
udp_sport, ntohs(mask->src));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
udp_sport, ntohs(key->src));
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c,
|
|
udp_dport, ntohs(mask->dst));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v,
|
|
udp_dport, ntohs(key->dst));
|
|
break;
|
|
default:
|
|
netdev_err(priv->netdev,
|
|
"Only UDP and TCP transport are supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (mask->src || mask->dst)
|
|
*min_inline = MLX5_INLINE_MODE_TCP_UDP;
|
|
}
|
|
|
|
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP)) {
|
|
struct flow_dissector_key_tcp *key =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_TCP,
|
|
f->key);
|
|
struct flow_dissector_key_tcp *mask =
|
|
skb_flow_dissector_target(f->dissector,
|
|
FLOW_DISSECTOR_KEY_TCP,
|
|
f->mask);
|
|
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_c, tcp_flags,
|
|
ntohs(mask->flags));
|
|
MLX5_SET(fte_match_set_lyr_2_4, headers_v, tcp_flags,
|
|
ntohs(key->flags));
|
|
|
|
if (mask->flags)
|
|
*min_inline = MLX5_INLINE_MODE_TCP_UDP;
|
|
}
|
|
|
|
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 mlx5_core_dev *dev = priv->mdev;
|
|
struct mlx5_eswitch *esw = dev->priv.eswitch;
|
|
struct mlx5e_rep_priv *rpriv = priv->ppriv;
|
|
struct mlx5_eswitch_rep *rep;
|
|
u8 min_inline;
|
|
int err;
|
|
|
|
err = __parse_cls_flower(priv, spec, f, &min_inline);
|
|
|
|
if (!err && (flow->flags & MLX5E_TC_FLOW_ESWITCH)) {
|
|
rep = rpriv->rep;
|
|
if (rep->vport != FDB_UPLINK_VPORT &&
|
|
(esw->offloads.inline_mode != MLX5_INLINE_MODE_NONE &&
|
|
esw->offloads.inline_mode < min_inline)) {
|
|
netdev_warn(priv->netdev,
|
|
"Flow is not offloaded due to min inline setting, required %d actual %d\n",
|
|
min_inline, esw->offloads.inline_mode);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
struct pedit_headers {
|
|
struct ethhdr eth;
|
|
struct iphdr ip4;
|
|
struct ipv6hdr ip6;
|
|
struct tcphdr tcp;
|
|
struct udphdr udp;
|
|
};
|
|
|
|
static int pedit_header_offsets[] = {
|
|
[TCA_PEDIT_KEY_EX_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth),
|
|
[TCA_PEDIT_KEY_EX_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4),
|
|
[TCA_PEDIT_KEY_EX_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6),
|
|
[TCA_PEDIT_KEY_EX_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp),
|
|
[TCA_PEDIT_KEY_EX_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 *masks,
|
|
struct pedit_headers *vals)
|
|
{
|
|
u32 *curr_pmask, *curr_pval;
|
|
|
|
if (hdr_type >= __PEDIT_HDR_TYPE_MAX)
|
|
goto out_err;
|
|
|
|
curr_pmask = (u32 *)(pedit_header(masks, hdr_type) + offset);
|
|
curr_pval = (u32 *)(pedit_header(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;
|
|
};
|
|
|
|
#define OFFLOAD(fw_field, size, field, off) \
|
|
{MLX5_ACTION_IN_FIELD_OUT_ ## fw_field, size, offsetof(struct pedit_headers, field) + (off)}
|
|
|
|
static struct mlx5_fields fields[] = {
|
|
OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
|
|
OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
|
|
OFFLOAD(DMAC_15_0, 2, eth.h_dest[4], 0),
|
|
OFFLOAD(SMAC_47_16, 4, eth.h_source[0], 0),
|
|
OFFLOAD(SMAC_15_0, 2, eth.h_source[4], 0),
|
|
OFFLOAD(ETHERTYPE, 2, eth.h_proto, 0),
|
|
|
|
OFFLOAD(IP_TTL, 1, ip4.ttl, 0),
|
|
OFFLOAD(SIPV4, 4, ip4.saddr, 0),
|
|
OFFLOAD(DIPV4, 4, ip4.daddr, 0),
|
|
|
|
OFFLOAD(SIPV6_127_96, 4, ip6.saddr.s6_addr32[0], 0),
|
|
OFFLOAD(SIPV6_95_64, 4, ip6.saddr.s6_addr32[1], 0),
|
|
OFFLOAD(SIPV6_63_32, 4, ip6.saddr.s6_addr32[2], 0),
|
|
OFFLOAD(SIPV6_31_0, 4, ip6.saddr.s6_addr32[3], 0),
|
|
OFFLOAD(DIPV6_127_96, 4, ip6.daddr.s6_addr32[0], 0),
|
|
OFFLOAD(DIPV6_95_64, 4, ip6.daddr.s6_addr32[1], 0),
|
|
OFFLOAD(DIPV6_63_32, 4, ip6.daddr.s6_addr32[2], 0),
|
|
OFFLOAD(DIPV6_31_0, 4, ip6.daddr.s6_addr32[3], 0),
|
|
OFFLOAD(IPV6_HOPLIMIT, 1, ip6.hop_limit, 0),
|
|
|
|
OFFLOAD(TCP_SPORT, 2, tcp.source, 0),
|
|
OFFLOAD(TCP_DPORT, 2, tcp.dest, 0),
|
|
OFFLOAD(TCP_FLAGS, 1, tcp.ack_seq, 5),
|
|
|
|
OFFLOAD(UDP_SPORT, 2, udp.source, 0),
|
|
OFFLOAD(UDP_DPORT, 2, udp.dest, 0),
|
|
};
|
|
|
|
/* On input attr->num_mod_hdr_actions tells how many HW actions can be parsed at
|
|
* max from the SW pedit action. On success, it says how many HW actions were
|
|
* actually parsed.
|
|
*/
|
|
static int offload_pedit_fields(struct pedit_headers *masks,
|
|
struct pedit_headers *vals,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr)
|
|
{
|
|
struct pedit_headers *set_masks, *add_masks, *set_vals, *add_vals;
|
|
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 = &masks[TCA_PEDIT_KEY_EX_CMD_SET];
|
|
add_masks = &masks[TCA_PEDIT_KEY_EX_CMD_ADD];
|
|
set_vals = &vals[TCA_PEDIT_KEY_EX_CMD_SET];
|
|
add_vals = &vals[TCA_PEDIT_KEY_EX_CMD_ADD];
|
|
|
|
action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
|
|
action = parse_attr->mod_hdr_actions;
|
|
max_actions = parse_attr->num_mod_hdr_actions;
|
|
nactions = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(fields); i++) {
|
|
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) {
|
|
printk(KERN_WARNING "mlx5: can't set and add to the same HW field (%x)\n", f->field);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (nactions == max_actions) {
|
|
printk(KERN_WARNING "mlx5: parsed %d pedit actions, can't do more\n", nactions);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (s_mask) {
|
|
cmd = MLX5_ACTION_TYPE_SET;
|
|
mask = s_mask;
|
|
vals_p = (void *)set_vals + f->offset;
|
|
/* clear to denote we consumed this field */
|
|
memset(s_masks_p, 0, f->size);
|
|
} else {
|
|
cmd = MLX5_ACTION_TYPE_ADD;
|
|
mask = a_mask;
|
|
vals_p = (void *)add_vals + f->offset;
|
|
/* clear to denote we consumed this field */
|
|
memset(a_masks_p, 0, f->size);
|
|
}
|
|
|
|
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) {
|
|
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 alloc_mod_hdr_actions(struct mlx5e_priv *priv,
|
|
const struct tc_action *a, int namespace,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr)
|
|
{
|
|
int nkeys, action_size, max_actions;
|
|
|
|
nkeys = tcf_pedit_nkeys(a);
|
|
action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
|
|
|
|
if (namespace == MLX5_FLOW_NAMESPACE_FDB) /* FDB offloading */
|
|
max_actions = MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, max_modify_header_actions);
|
|
else /* namespace is MLX5_FLOW_NAMESPACE_KERNEL - NIC offloading */
|
|
max_actions = MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, max_modify_header_actions);
|
|
|
|
/* 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->num_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 tc_action *a, int namespace,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr)
|
|
{
|
|
struct pedit_headers masks[__PEDIT_CMD_MAX], vals[__PEDIT_CMD_MAX], *cmd_masks;
|
|
int nkeys, i, err = -EOPNOTSUPP;
|
|
u32 mask, val, offset;
|
|
u8 cmd, htype;
|
|
|
|
nkeys = tcf_pedit_nkeys(a);
|
|
|
|
memset(masks, 0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
|
|
memset(vals, 0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
|
|
|
|
for (i = 0; i < nkeys; i++) {
|
|
htype = tcf_pedit_htype(a, i);
|
|
cmd = tcf_pedit_cmd(a, i);
|
|
err = -EOPNOTSUPP; /* can't be all optimistic */
|
|
|
|
if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK) {
|
|
printk(KERN_WARNING "mlx5: legacy pedit isn't offloaded\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (cmd != TCA_PEDIT_KEY_EX_CMD_SET && cmd != TCA_PEDIT_KEY_EX_CMD_ADD) {
|
|
printk(KERN_WARNING "mlx5: pedit cmd %d isn't offloaded\n", cmd);
|
|
goto out_err;
|
|
}
|
|
|
|
mask = tcf_pedit_mask(a, i);
|
|
val = tcf_pedit_val(a, i);
|
|
offset = tcf_pedit_offset(a, i);
|
|
|
|
err = set_pedit_val(htype, ~mask, val, offset, &masks[cmd], &vals[cmd]);
|
|
if (err)
|
|
goto out_err;
|
|
}
|
|
|
|
err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr);
|
|
if (err)
|
|
goto out_err;
|
|
|
|
err = offload_pedit_fields(masks, vals, parse_attr);
|
|
if (err < 0)
|
|
goto out_dealloc_parsed_actions;
|
|
|
|
for (cmd = 0; cmd < __PEDIT_CMD_MAX; cmd++) {
|
|
cmd_masks = &masks[cmd];
|
|
if (memcmp(cmd_masks, &zero_masks, sizeof(zero_masks))) {
|
|
printk(KERN_WARNING "mlx5: 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)
|
|
{
|
|
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)) {
|
|
netdev_warn(priv->netdev,
|
|
"TC csum action is only offloaded with pedit\n");
|
|
return false;
|
|
}
|
|
|
|
if (update_flags & ~prot_flags) {
|
|
netdev_warn(priv->netdev,
|
|
"can't offload TC csum action for some header/s - flags %#x\n",
|
|
update_flags);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool modify_header_match_supported(struct mlx5_flow_spec *spec,
|
|
struct tcf_exts *exts)
|
|
{
|
|
const struct tc_action *a;
|
|
bool modify_ip_header;
|
|
LIST_HEAD(actions);
|
|
u8 htype, ip_proto;
|
|
void *headers_v;
|
|
u16 ethertype;
|
|
int nkeys, i;
|
|
|
|
headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, outer_headers);
|
|
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;
|
|
tcf_exts_to_list(exts, &actions);
|
|
list_for_each_entry(a, &actions, list) {
|
|
if (!is_tcf_pedit(a))
|
|
continue;
|
|
|
|
nkeys = tcf_pedit_nkeys(a);
|
|
for (i = 0; i < nkeys; i++) {
|
|
htype = tcf_pedit_htype(a, i);
|
|
if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 ||
|
|
htype == TCA_PEDIT_KEY_EX_HDR_TYPE_IP6) {
|
|
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) {
|
|
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 tcf_exts *exts,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr,
|
|
struct mlx5e_tc_flow *flow)
|
|
{
|
|
u32 actions;
|
|
|
|
if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
|
|
actions = flow->esw_attr->action;
|
|
else
|
|
actions = flow->nic_attr->action;
|
|
|
|
if (actions & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
|
|
return modify_header_match_supported(&parse_attr->spec, exts);
|
|
|
|
return true;
|
|
}
|
|
|
|
static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr,
|
|
struct mlx5e_tc_flow *flow)
|
|
{
|
|
struct mlx5_nic_flow_attr *attr = flow->nic_attr;
|
|
const struct tc_action *a;
|
|
LIST_HEAD(actions);
|
|
int err;
|
|
|
|
if (!tcf_exts_has_actions(exts))
|
|
return -EINVAL;
|
|
|
|
attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
|
|
attr->action = 0;
|
|
|
|
tcf_exts_to_list(exts, &actions);
|
|
list_for_each_entry(a, &actions, list) {
|
|
if (is_tcf_gact_shot(a)) {
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
|
|
if (MLX5_CAP_FLOWTABLE(priv->mdev,
|
|
flow_table_properties_nic_receive.flow_counter))
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_pedit(a)) {
|
|
err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_KERNEL,
|
|
parse_attr);
|
|
if (err)
|
|
return err;
|
|
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
|
|
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_csum(a)) {
|
|
if (csum_offload_supported(priv, attr->action,
|
|
tcf_csum_update_flags(a)))
|
|
continue;
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (is_tcf_skbedit_mark(a)) {
|
|
u32 mark = tcf_skbedit_mark(a);
|
|
|
|
if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
|
|
netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
|
|
mark);
|
|
return -EINVAL;
|
|
}
|
|
|
|
attr->flow_tag = mark;
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
|
|
continue;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!actions_match_supported(priv, exts, parse_attr, flow))
|
|
return -EOPNOTSUPP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int cmp_encap_info(struct ip_tunnel_key *a,
|
|
struct ip_tunnel_key *b)
|
|
{
|
|
return memcmp(a, b, sizeof(*a));
|
|
}
|
|
|
|
static inline int hash_encap_info(struct ip_tunnel_key *key)
|
|
{
|
|
return jhash(key, sizeof(*key), 0);
|
|
}
|
|
|
|
static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
|
|
struct net_device *mirred_dev,
|
|
struct net_device **out_dev,
|
|
struct flowi4 *fl4,
|
|
struct neighbour **out_n,
|
|
int *out_ttl)
|
|
{
|
|
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
|
struct rtable *rt;
|
|
struct neighbour *n = NULL;
|
|
|
|
#if IS_ENABLED(CONFIG_INET)
|
|
int ret;
|
|
|
|
rt = ip_route_output_key(dev_net(mirred_dev), fl4);
|
|
ret = PTR_ERR_OR_ZERO(rt);
|
|
if (ret)
|
|
return ret;
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
/* if the egress device isn't on the same HW e-switch, we use the uplink */
|
|
if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
|
|
*out_dev = mlx5_eswitch_get_uplink_netdev(esw);
|
|
else
|
|
*out_dev = rt->dst.dev;
|
|
|
|
*out_ttl = ip4_dst_hoplimit(&rt->dst);
|
|
n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
|
|
ip_rt_put(rt);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
*out_n = n;
|
|
return 0;
|
|
}
|
|
|
|
static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
|
|
struct net_device *mirred_dev,
|
|
struct net_device **out_dev,
|
|
struct flowi6 *fl6,
|
|
struct neighbour **out_n,
|
|
int *out_ttl)
|
|
{
|
|
struct neighbour *n = NULL;
|
|
struct dst_entry *dst;
|
|
|
|
#if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
|
|
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
|
int ret;
|
|
|
|
ret = ipv6_stub->ipv6_dst_lookup(dev_net(mirred_dev), NULL, &dst,
|
|
fl6);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*out_ttl = ip6_dst_hoplimit(dst);
|
|
|
|
/* if the egress device isn't on the same HW e-switch, we use the uplink */
|
|
if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
|
|
*out_dev = mlx5_eswitch_get_uplink_netdev(esw);
|
|
else
|
|
*out_dev = dst->dev;
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
|
|
n = dst_neigh_lookup(dst, &fl6->daddr);
|
|
dst_release(dst);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
*out_n = n;
|
|
return 0;
|
|
}
|
|
|
|
static void gen_vxlan_header_ipv4(struct net_device *out_dev,
|
|
char buf[], int encap_size,
|
|
unsigned char h_dest[ETH_ALEN],
|
|
int ttl,
|
|
__be32 daddr,
|
|
__be32 saddr,
|
|
__be16 udp_dst_port,
|
|
__be32 vx_vni)
|
|
{
|
|
struct ethhdr *eth = (struct ethhdr *)buf;
|
|
struct iphdr *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
|
|
struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
|
|
struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
|
|
|
|
memset(buf, 0, encap_size);
|
|
|
|
ether_addr_copy(eth->h_dest, h_dest);
|
|
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
|
eth->h_proto = htons(ETH_P_IP);
|
|
|
|
ip->daddr = daddr;
|
|
ip->saddr = saddr;
|
|
|
|
ip->ttl = ttl;
|
|
ip->protocol = IPPROTO_UDP;
|
|
ip->version = 0x4;
|
|
ip->ihl = 0x5;
|
|
|
|
udp->dest = udp_dst_port;
|
|
vxh->vx_flags = VXLAN_HF_VNI;
|
|
vxh->vx_vni = vxlan_vni_field(vx_vni);
|
|
}
|
|
|
|
static void gen_vxlan_header_ipv6(struct net_device *out_dev,
|
|
char buf[], int encap_size,
|
|
unsigned char h_dest[ETH_ALEN],
|
|
int ttl,
|
|
struct in6_addr *daddr,
|
|
struct in6_addr *saddr,
|
|
__be16 udp_dst_port,
|
|
__be32 vx_vni)
|
|
{
|
|
struct ethhdr *eth = (struct ethhdr *)buf;
|
|
struct ipv6hdr *ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
|
|
struct udphdr *udp = (struct udphdr *)((char *)ip6h + sizeof(struct ipv6hdr));
|
|
struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
|
|
|
|
memset(buf, 0, encap_size);
|
|
|
|
ether_addr_copy(eth->h_dest, h_dest);
|
|
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
|
eth->h_proto = htons(ETH_P_IPV6);
|
|
|
|
ip6_flow_hdr(ip6h, 0, 0);
|
|
/* the HW fills up ipv6 payload len */
|
|
ip6h->nexthdr = IPPROTO_UDP;
|
|
ip6h->hop_limit = ttl;
|
|
ip6h->daddr = *daddr;
|
|
ip6h->saddr = *saddr;
|
|
|
|
udp->dest = udp_dst_port;
|
|
vxh->vx_flags = VXLAN_HF_VNI;
|
|
vxh->vx_vni = vxlan_vni_field(vx_vni);
|
|
}
|
|
|
|
static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
|
struct net_device *mirred_dev,
|
|
struct mlx5e_encap_entry *e)
|
|
{
|
|
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
|
|
int ipv4_encap_size = ETH_HLEN + sizeof(struct iphdr) + VXLAN_HLEN;
|
|
struct ip_tunnel_key *tun_key = &e->tun_info.key;
|
|
struct net_device *out_dev;
|
|
struct neighbour *n = NULL;
|
|
struct flowi4 fl4 = {};
|
|
char *encap_header;
|
|
int ttl, err;
|
|
u8 nud_state;
|
|
|
|
if (max_encap_size < ipv4_encap_size) {
|
|
mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
|
|
ipv4_encap_size, max_encap_size);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
|
|
if (!encap_header)
|
|
return -ENOMEM;
|
|
|
|
switch (e->tunnel_type) {
|
|
case MLX5_HEADER_TYPE_VXLAN:
|
|
fl4.flowi4_proto = IPPROTO_UDP;
|
|
fl4.fl4_dport = tun_key->tp_dst;
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
goto free_encap;
|
|
}
|
|
fl4.flowi4_tos = tun_key->tos;
|
|
fl4.daddr = tun_key->u.ipv4.dst;
|
|
fl4.saddr = tun_key->u.ipv4.src;
|
|
|
|
err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
|
|
&fl4, &n, &ttl);
|
|
if (err)
|
|
goto free_encap;
|
|
|
|
/* used by mlx5e_detach_encap to lookup a neigh hash table
|
|
* entry in the neigh hash table when a user deletes a rule
|
|
*/
|
|
e->m_neigh.dev = n->dev;
|
|
e->m_neigh.family = n->ops->family;
|
|
memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
|
|
e->out_dev = out_dev;
|
|
|
|
/* It's importent to add the neigh to the hash table before checking
|
|
* the neigh validity state. So if we'll get a notification, in case the
|
|
* neigh changes it's validity state, we would find the relevant neigh
|
|
* in the hash.
|
|
*/
|
|
err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
|
|
if (err)
|
|
goto free_encap;
|
|
|
|
read_lock_bh(&n->lock);
|
|
nud_state = n->nud_state;
|
|
ether_addr_copy(e->h_dest, n->ha);
|
|
read_unlock_bh(&n->lock);
|
|
|
|
switch (e->tunnel_type) {
|
|
case MLX5_HEADER_TYPE_VXLAN:
|
|
gen_vxlan_header_ipv4(out_dev, encap_header,
|
|
ipv4_encap_size, e->h_dest, ttl,
|
|
fl4.daddr,
|
|
fl4.saddr, tun_key->tp_dst,
|
|
tunnel_id_to_key32(tun_key->tun_id));
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
goto destroy_neigh_entry;
|
|
}
|
|
e->encap_size = ipv4_encap_size;
|
|
e->encap_header = encap_header;
|
|
|
|
if (!(nud_state & NUD_VALID)) {
|
|
neigh_event_send(n, NULL);
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
|
|
ipv4_encap_size, encap_header, &e->encap_id);
|
|
if (err)
|
|
goto destroy_neigh_entry;
|
|
|
|
e->flags |= MLX5_ENCAP_ENTRY_VALID;
|
|
mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
|
|
neigh_release(n);
|
|
return err;
|
|
|
|
destroy_neigh_entry:
|
|
mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
|
|
free_encap:
|
|
kfree(encap_header);
|
|
out:
|
|
if (n)
|
|
neigh_release(n);
|
|
return err;
|
|
}
|
|
|
|
static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
|
|
struct net_device *mirred_dev,
|
|
struct mlx5e_encap_entry *e)
|
|
{
|
|
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
|
|
int ipv6_encap_size = ETH_HLEN + sizeof(struct ipv6hdr) + VXLAN_HLEN;
|
|
struct ip_tunnel_key *tun_key = &e->tun_info.key;
|
|
struct net_device *out_dev;
|
|
struct neighbour *n = NULL;
|
|
struct flowi6 fl6 = {};
|
|
char *encap_header;
|
|
int err, ttl = 0;
|
|
u8 nud_state;
|
|
|
|
if (max_encap_size < ipv6_encap_size) {
|
|
mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
|
|
ipv6_encap_size, max_encap_size);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
|
|
if (!encap_header)
|
|
return -ENOMEM;
|
|
|
|
switch (e->tunnel_type) {
|
|
case MLX5_HEADER_TYPE_VXLAN:
|
|
fl6.flowi6_proto = IPPROTO_UDP;
|
|
fl6.fl6_dport = tun_key->tp_dst;
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
goto free_encap;
|
|
}
|
|
|
|
fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
|
|
fl6.daddr = tun_key->u.ipv6.dst;
|
|
fl6.saddr = tun_key->u.ipv6.src;
|
|
|
|
err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
|
|
&fl6, &n, &ttl);
|
|
if (err)
|
|
goto free_encap;
|
|
|
|
/* used by mlx5e_detach_encap to lookup a neigh hash table
|
|
* entry in the neigh hash table when a user deletes a rule
|
|
*/
|
|
e->m_neigh.dev = n->dev;
|
|
e->m_neigh.family = n->ops->family;
|
|
memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
|
|
e->out_dev = out_dev;
|
|
|
|
/* It's importent to add the neigh to the hash table before checking
|
|
* the neigh validity state. So if we'll get a notification, in case the
|
|
* neigh changes it's validity state, we would find the relevant neigh
|
|
* in the hash.
|
|
*/
|
|
err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
|
|
if (err)
|
|
goto free_encap;
|
|
|
|
read_lock_bh(&n->lock);
|
|
nud_state = n->nud_state;
|
|
ether_addr_copy(e->h_dest, n->ha);
|
|
read_unlock_bh(&n->lock);
|
|
|
|
switch (e->tunnel_type) {
|
|
case MLX5_HEADER_TYPE_VXLAN:
|
|
gen_vxlan_header_ipv6(out_dev, encap_header,
|
|
ipv6_encap_size, e->h_dest, ttl,
|
|
&fl6.daddr,
|
|
&fl6.saddr, tun_key->tp_dst,
|
|
tunnel_id_to_key32(tun_key->tun_id));
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
goto destroy_neigh_entry;
|
|
}
|
|
|
|
e->encap_size = ipv6_encap_size;
|
|
e->encap_header = encap_header;
|
|
|
|
if (!(nud_state & NUD_VALID)) {
|
|
neigh_event_send(n, NULL);
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
|
|
ipv6_encap_size, encap_header, &e->encap_id);
|
|
if (err)
|
|
goto destroy_neigh_entry;
|
|
|
|
e->flags |= MLX5_ENCAP_ENTRY_VALID;
|
|
mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
|
|
neigh_release(n);
|
|
return err;
|
|
|
|
destroy_neigh_entry:
|
|
mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
|
|
free_encap:
|
|
kfree(encap_header);
|
|
out:
|
|
if (n)
|
|
neigh_release(n);
|
|
return err;
|
|
}
|
|
|
|
static int mlx5e_attach_encap(struct mlx5e_priv *priv,
|
|
struct ip_tunnel_info *tun_info,
|
|
struct net_device *mirred_dev,
|
|
struct net_device **encap_dev,
|
|
struct mlx5e_tc_flow *flow)
|
|
{
|
|
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
|
struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
|
|
unsigned short family = ip_tunnel_info_af(tun_info);
|
|
struct mlx5e_priv *up_priv = netdev_priv(up_dev);
|
|
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
|
|
struct ip_tunnel_key *key = &tun_info->key;
|
|
struct mlx5e_encap_entry *e;
|
|
int tunnel_type, err = 0;
|
|
uintptr_t hash_key;
|
|
bool found = false;
|
|
|
|
/* udp dst port must be set */
|
|
if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
|
|
goto vxlan_encap_offload_err;
|
|
|
|
/* setting udp src port isn't supported */
|
|
if (memchr_inv(&key->tp_src, 0, sizeof(key->tp_src))) {
|
|
vxlan_encap_offload_err:
|
|
netdev_warn(priv->netdev,
|
|
"must set udp dst port and not set udp src port\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->tp_dst)) &&
|
|
MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
|
|
tunnel_type = MLX5_HEADER_TYPE_VXLAN;
|
|
} else {
|
|
netdev_warn(priv->netdev,
|
|
"%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->tp_dst));
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
hash_key = hash_encap_info(key);
|
|
|
|
hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
|
|
encap_hlist, hash_key) {
|
|
if (!cmp_encap_info(&e->tun_info.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;
|
|
e->tunnel_type = tunnel_type;
|
|
INIT_LIST_HEAD(&e->flows);
|
|
|
|
if (family == AF_INET)
|
|
err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e);
|
|
else if (family == AF_INET6)
|
|
err = mlx5e_create_encap_header_ipv6(priv, mirred_dev, e);
|
|
|
|
if (err && err != -EAGAIN)
|
|
goto out_err;
|
|
|
|
hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
|
|
|
|
attach_flow:
|
|
list_add(&flow->encap, &e->flows);
|
|
*encap_dev = e->out_dev;
|
|
if (e->flags & MLX5_ENCAP_ENTRY_VALID)
|
|
attr->encap_id = e->encap_id;
|
|
else
|
|
err = -EAGAIN;
|
|
|
|
return err;
|
|
|
|
out_err:
|
|
kfree(e);
|
|
return err;
|
|
}
|
|
|
|
static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr,
|
|
struct mlx5e_tc_flow *flow)
|
|
{
|
|
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
|
|
struct mlx5e_rep_priv *rpriv = priv->ppriv;
|
|
struct ip_tunnel_info *info = NULL;
|
|
const struct tc_action *a;
|
|
LIST_HEAD(actions);
|
|
bool encap = false;
|
|
int err = 0;
|
|
|
|
if (!tcf_exts_has_actions(exts))
|
|
return -EINVAL;
|
|
|
|
memset(attr, 0, sizeof(*attr));
|
|
attr->in_rep = rpriv->rep;
|
|
|
|
tcf_exts_to_list(exts, &actions);
|
|
list_for_each_entry(a, &actions, list) {
|
|
if (is_tcf_gact_shot(a)) {
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
|
|
MLX5_FLOW_CONTEXT_ACTION_COUNT;
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_pedit(a)) {
|
|
err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_FDB,
|
|
parse_attr);
|
|
if (err)
|
|
return err;
|
|
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_csum(a)) {
|
|
if (csum_offload_supported(priv, attr->action,
|
|
tcf_csum_update_flags(a)))
|
|
continue;
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (is_tcf_mirred_egress_redirect(a)) {
|
|
int ifindex = tcf_mirred_ifindex(a);
|
|
struct net_device *out_dev;
|
|
struct mlx5e_priv *out_priv;
|
|
|
|
out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);
|
|
|
|
if (switchdev_port_same_parent_id(priv->netdev,
|
|
out_dev)) {
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
|
|
MLX5_FLOW_CONTEXT_ACTION_COUNT;
|
|
out_priv = netdev_priv(out_dev);
|
|
rpriv = out_priv->ppriv;
|
|
attr->out_rep = rpriv->rep;
|
|
} else if (encap) {
|
|
parse_attr->mirred_ifindex = ifindex;
|
|
parse_attr->tun_info = *info;
|
|
attr->parse_attr = parse_attr;
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_ENCAP |
|
|
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
|
|
MLX5_FLOW_CONTEXT_ACTION_COUNT;
|
|
/* attr->out_rep is resolved when we handle encap */
|
|
} else {
|
|
pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
|
|
priv->netdev->name, out_dev->name);
|
|
return -EINVAL;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_tunnel_set(a)) {
|
|
info = tcf_tunnel_info(a);
|
|
if (info)
|
|
encap = true;
|
|
else
|
|
return -EOPNOTSUPP;
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_vlan(a)) {
|
|
if (tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
|
|
} else if (tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
|
|
if (tcf_vlan_push_proto(a) != htons(ETH_P_8021Q))
|
|
return -EOPNOTSUPP;
|
|
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
|
|
attr->vlan = tcf_vlan_push_vid(a);
|
|
} else { /* action is TCA_VLAN_ACT_MODIFY */
|
|
return -EOPNOTSUPP;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (is_tcf_tunnel_release(a)) {
|
|
attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
|
|
continue;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!actions_match_supported(priv, exts, parse_attr, flow))
|
|
return -EOPNOTSUPP;
|
|
|
|
return err;
|
|
}
|
|
|
|
int mlx5e_configure_flower(struct mlx5e_priv *priv,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
|
|
struct mlx5e_tc_flow_parse_attr *parse_attr;
|
|
struct mlx5e_tc_table *tc = &priv->fs.tc;
|
|
struct mlx5e_tc_flow *flow;
|
|
int attr_size, err = 0;
|
|
u8 flow_flags = 0;
|
|
|
|
if (esw && esw->mode == SRIOV_OFFLOADS) {
|
|
flow_flags = MLX5E_TC_FLOW_ESWITCH;
|
|
attr_size = sizeof(struct mlx5_esw_flow_attr);
|
|
} else {
|
|
flow_flags = MLX5E_TC_FLOW_NIC;
|
|
attr_size = sizeof(struct mlx5_nic_flow_attr);
|
|
}
|
|
|
|
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;
|
|
|
|
err = parse_cls_flower(priv, flow, &parse_attr->spec, f);
|
|
if (err < 0)
|
|
goto err_free;
|
|
|
|
if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
|
|
err = parse_tc_fdb_actions(priv, f->exts, parse_attr, flow);
|
|
if (err < 0)
|
|
goto err_free;
|
|
flow->rule = mlx5e_tc_add_fdb_flow(priv, parse_attr, flow);
|
|
} else {
|
|
err = parse_tc_nic_actions(priv, f->exts, parse_attr, flow);
|
|
if (err < 0)
|
|
goto err_free;
|
|
flow->rule = mlx5e_tc_add_nic_flow(priv, parse_attr, flow);
|
|
}
|
|
|
|
if (IS_ERR(flow->rule)) {
|
|
err = PTR_ERR(flow->rule);
|
|
if (err != -EAGAIN)
|
|
goto err_free;
|
|
}
|
|
|
|
if (err != -EAGAIN)
|
|
flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
|
|
|
|
err = rhashtable_insert_fast(&tc->ht, &flow->node,
|
|
tc->ht_params);
|
|
if (err)
|
|
goto err_del_rule;
|
|
|
|
if (flow->flags & MLX5E_TC_FLOW_ESWITCH &&
|
|
!(flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP))
|
|
kvfree(parse_attr);
|
|
return err;
|
|
|
|
err_del_rule:
|
|
mlx5e_tc_del_flow(priv, flow);
|
|
|
|
err_free:
|
|
kvfree(parse_attr);
|
|
kfree(flow);
|
|
return err;
|
|
}
|
|
|
|
int mlx5e_delete_flower(struct mlx5e_priv *priv,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
struct mlx5e_tc_flow *flow;
|
|
struct mlx5e_tc_table *tc = &priv->fs.tc;
|
|
|
|
flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
|
|
tc->ht_params);
|
|
if (!flow)
|
|
return -EINVAL;
|
|
|
|
rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
|
|
|
|
mlx5e_tc_del_flow(priv, flow);
|
|
|
|
kfree(flow);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mlx5e_stats_flower(struct mlx5e_priv *priv,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
struct mlx5e_tc_table *tc = &priv->fs.tc;
|
|
struct mlx5e_tc_flow *flow;
|
|
struct mlx5_fc *counter;
|
|
u64 bytes;
|
|
u64 packets;
|
|
u64 lastuse;
|
|
|
|
flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
|
|
tc->ht_params);
|
|
if (!flow)
|
|
return -EINVAL;
|
|
|
|
if (!(flow->flags & MLX5E_TC_FLOW_OFFLOADED))
|
|
return 0;
|
|
|
|
counter = mlx5_flow_rule_counter(flow->rule);
|
|
if (!counter)
|
|
return 0;
|
|
|
|
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
|
|
|
|
tcf_exts_stats_update(f->exts, bytes, packets, lastuse);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
|
|
.head_offset = offsetof(struct mlx5e_tc_flow, node),
|
|
.key_offset = offsetof(struct mlx5e_tc_flow, cookie),
|
|
.key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
|
|
.automatic_shrinking = true,
|
|
};
|
|
|
|
int mlx5e_tc_init(struct mlx5e_priv *priv)
|
|
{
|
|
struct mlx5e_tc_table *tc = &priv->fs.tc;
|
|
|
|
hash_init(tc->mod_hdr_tbl);
|
|
|
|
tc->ht_params = mlx5e_tc_flow_ht_params;
|
|
return rhashtable_init(&tc->ht, &tc->ht_params);
|
|
}
|
|
|
|
static void _mlx5e_tc_del_flow(void *ptr, void *arg)
|
|
{
|
|
struct mlx5e_tc_flow *flow = ptr;
|
|
struct mlx5e_priv *priv = arg;
|
|
|
|
mlx5e_tc_del_flow(priv, flow);
|
|
kfree(flow);
|
|
}
|
|
|
|
void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
|
|
{
|
|
struct mlx5e_tc_table *tc = &priv->fs.tc;
|
|
|
|
rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
|
|
|
|
if (!IS_ERR_OR_NULL(tc->t)) {
|
|
mlx5_destroy_flow_table(tc->t);
|
|
tc->t = NULL;
|
|
}
|
|
}
|