drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

   1 /*
   2  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <net/flow_dissector.h>
  34 #include <net/sch_generic.h>
  35 #include <net/pkt_cls.h>
  36 #include <net/tc_act/tc_gact.h>
  37 #include <net/tc_act/tc_skbedit.h>
  38 #include <linux/mlx5/fs.h>
  39 #include <linux/mlx5/device.h>
  40 #include <linux/rhashtable.h>
  41 #include <net/switchdev.h>
  42 #include <net/tc_act/tc_mirred.h>
  43 #include <net/tc_act/tc_vlan.h>
  44 #include <net/tc_act/tc_tunnel_key.h>
  45 #include <net/tc_act/tc_pedit.h>
  46 #include <net/tc_act/tc_csum.h>
  47 #include <net/vxlan.h>
  48 #include <net/arp.h>
  49 #include "en.h"
  50 #include "en_rep.h"
  51 #include "en_tc.h"
  52 #include "eswitch.h"
  53 #include "vxlan.h"
  54
  55 struct mlx5_nic_flow_attr {
  56         u32 action;
  57         u32 flow_tag;
  58         u32 mod_hdr_id;
  59 };
  60
  61 enum {
  62         MLX5E_TC_FLOW_ESWITCH   = BIT(0),
  63         MLX5E_TC_FLOW_NIC       = BIT(1),
  64         MLX5E_TC_FLOW_OFFLOADED = BIT(2),
  65 };
  66
  67 struct mlx5e_tc_flow {
  68         struct rhash_head       node;
  69         u64                     cookie;
  70         u8                      flags;
  71         struct mlx5_flow_handle *rule;
  72         struct list_head        encap;   /* flows sharing the same encap ID */
  73         struct list_head        mod_hdr; /* flows sharing the same mod hdr ID */
  74         union {
  75                 struct mlx5_esw_flow_attr esw_attr[0];
  76                 struct mlx5_nic_flow_attr nic_attr[0];
  77         };
  78 };
  79
  80 struct mlx5e_tc_flow_parse_attr {
  81         struct mlx5_flow_spec spec;
  82         int num_mod_hdr_actions;
  83         void *mod_hdr_actions;
  84 };
  85
  86 enum {
  87         MLX5_HEADER_TYPE_VXLAN = 0x0,
  88         MLX5_HEADER_TYPE_NVGRE = 0x1,
  89 };
  90
  91 #define MLX5E_TC_TABLE_NUM_ENTRIES 1024
  92 #define MLX5E_TC_TABLE_NUM_GROUPS 4
  93
  94 struct mod_hdr_key {
  95         int num_actions;
  96         void *actions;
  97 };
  98
  99 struct mlx5e_mod_hdr_entry {
 100         /* a node of a hash table which keeps all the mod_hdr entries */
 101         struct hlist_node mod_hdr_hlist;
 102
 103         /* flows sharing the same mod_hdr entry */
 104         struct list_head flows;
 105
 106         struct mod_hdr_key key;
 107
 108         u32 mod_hdr_id;
 109 };
 110
 111 #define MLX5_MH_ACT_SZ MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto)
 112
 113 static inline u32 hash_mod_hdr_info(struct mod_hdr_key *key)
 114 {
 115         return jhash(key->actions,
 116                      key->num_actions * MLX5_MH_ACT_SZ, 0);
 117 }
 118
 119 static inline int cmp_mod_hdr_info(struct mod_hdr_key *a,
 120                                    struct mod_hdr_key *b)
 121 {
 122         if (a->num_actions != b->num_actions)
 123                 return 1;
 124
 125         return memcmp(a->actions, b->actions, a->num_actions * MLX5_MH_ACT_SZ);
 126 }
 127
 128 static int mlx5e_attach_mod_hdr(struct mlx5e_priv *priv,
 129                                 struct mlx5e_tc_flow *flow,
 130                                 struct mlx5e_tc_flow_parse_attr *parse_attr)
 131 {
 132         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 133         int num_actions, actions_size, namespace, err;
 134         struct mlx5e_mod_hdr_entry *mh;
 135         struct mod_hdr_key key;
 136         bool found = false;
 137         u32 hash_key;
 138
 139         num_actions  = parse_attr->num_mod_hdr_actions;
 140         actions_size = MLX5_MH_ACT_SZ * num_actions;
 141
 142         key.actions = parse_attr->mod_hdr_actions;
 143         key.num_actions = num_actions;
 144
 145         hash_key = hash_mod_hdr_info(&key);
 146
 147         if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
 148                 namespace = MLX5_FLOW_NAMESPACE_FDB;
 149                 hash_for_each_possible(esw->offloads.mod_hdr_tbl, mh,
 150                                        mod_hdr_hlist, hash_key) {
 151                         if (!cmp_mod_hdr_info(&mh->key, &key)) {
 152                                 found = true;
 153                                 break;
 154                         }
 155                 }
 156         } else {
 157                 namespace = MLX5_FLOW_NAMESPACE_KERNEL;
 158                 hash_for_each_possible(priv->fs.tc.mod_hdr_tbl, mh,
 159                                        mod_hdr_hlist, hash_key) {
 160                         if (!cmp_mod_hdr_info(&mh->key, &key)) {
 161                                 found = true;
 162                                 break;
 163                         }
 164                 }
 165         }
 166
 167         if (found)
 168                 goto attach_flow;
 169
 170         mh = kzalloc(sizeof(*mh) + actions_size, GFP_KERNEL);
 171         if (!mh)
 172                 return -ENOMEM;
 173
 174         mh->key.actions = (void *)mh + sizeof(*mh);
 175         memcpy(mh->key.actions, key.actions, actions_size);
 176         mh->key.num_actions = num_actions;
 177         INIT_LIST_HEAD(&mh->flows);
 178
 179         err = mlx5_modify_header_alloc(priv->mdev, namespace,
 180                                        mh->key.num_actions,
 181                                        mh->key.actions,
 182                                        &mh->mod_hdr_id);
 183         if (err)
 184                 goto out_err;
 185
 186         if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
 187                 hash_add(esw->offloads.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
 188         else
 189                 hash_add(priv->fs.tc.mod_hdr_tbl, &mh->mod_hdr_hlist, hash_key);
 190
 191 attach_flow:
 192         list_add(&flow->mod_hdr, &mh->flows);
 193         if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
 194                 flow->esw_attr->mod_hdr_id = mh->mod_hdr_id;
 195         else
 196                 flow->nic_attr->mod_hdr_id = mh->mod_hdr_id;
 197
 198         return 0;
 199
 200 out_err:
 201         kfree(mh);
 202         return err;
 203 }
 204
 205 static void mlx5e_detach_mod_hdr(struct mlx5e_priv *priv,
 206                                  struct mlx5e_tc_flow *flow)
 207 {
 208         struct list_head *next = flow->mod_hdr.next;
 209
 210         list_del(&flow->mod_hdr);
 211
 212         if (list_empty(next)) {
 213                 struct mlx5e_mod_hdr_entry *mh;
 214
 215                 mh = list_entry(next, struct mlx5e_mod_hdr_entry, flows);
 216
 217                 mlx5_modify_header_dealloc(priv->mdev, mh->mod_hdr_id);
 218                 hash_del(&mh->mod_hdr_hlist);
 219                 kfree(mh);
 220         }
 221 }
 222
 223 static struct mlx5_flow_handle *
 224 mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
 225                       struct mlx5e_tc_flow_parse_attr *parse_attr,
 226                       struct mlx5e_tc_flow *flow)
 227 {
 228         struct mlx5_nic_flow_attr *attr = flow->nic_attr;
 229         struct mlx5_core_dev *dev = priv->mdev;
 230         struct mlx5_flow_destination dest = {};
 231         struct mlx5_flow_act flow_act = {
 232                 .action = attr->action,
 233                 .flow_tag = attr->flow_tag,
 234                 .encap_id = 0,
 235         };
 236         struct mlx5_fc *counter = NULL;
 237         struct mlx5_flow_handle *rule;
 238         bool table_created = false;
 239         int err;
 240
 241         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
 242                 dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
 243                 dest.ft = priv->fs.vlan.ft.t;
 244         } else if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
 245                 counter = mlx5_fc_create(dev, true);
 246                 if (IS_ERR(counter))
 247                         return ERR_CAST(counter);
 248
 249                 dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
 250                 dest.counter = counter;
 251         }
 252
 253         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
 254                 err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
 255                 flow_act.modify_id = attr->mod_hdr_id;
 256                 kfree(parse_attr->mod_hdr_actions);
 257                 if (err) {
 258                         rule = ERR_PTR(err);
 259                         goto err_create_mod_hdr_id;
 260                 }
 261         }
 262
 263         if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
 264                 priv->fs.tc.t =
 265                         mlx5_create_auto_grouped_flow_table(priv->fs.ns,
 266                                                             MLX5E_TC_PRIO,
 267                                                             MLX5E_TC_TABLE_NUM_ENTRIES,
 268                                                             MLX5E_TC_TABLE_NUM_GROUPS,
 269                                                             0, 0);
 270                 if (IS_ERR(priv->fs.tc.t)) {
 271                         netdev_err(priv->netdev,
 272                                    "Failed to create tc offload table\n");
 273                         rule = ERR_CAST(priv->fs.tc.t);
 274                         goto err_create_ft;
 275                 }
 276
 277                 table_created = true;
 278         }
 279
 280         parse_attr->spec.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
 281         rule = mlx5_add_flow_rules(priv->fs.tc.t, &parse_attr->spec,
 282                                    &flow_act, &dest, 1);
 283
 284         if (IS_ERR(rule))
 285                 goto err_add_rule;
 286
 287         return rule;
 288
 289 err_add_rule:
 290         if (table_created) {
 291                 mlx5_destroy_flow_table(priv->fs.tc.t);
 292                 priv->fs.tc.t = NULL;
 293         }
 294 err_create_ft:
 295         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
 296                 mlx5e_detach_mod_hdr(priv, flow);
 297 err_create_mod_hdr_id:
 298         mlx5_fc_destroy(dev, counter);
 299
 300         return rule;
 301 }
 302
 303 static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
 304                                   struct mlx5e_tc_flow *flow)
 305 {
 306         struct mlx5_nic_flow_attr *attr = flow->nic_attr;
 307         struct mlx5_fc *counter = NULL;
 308
 309         counter = mlx5_flow_rule_counter(flow->rule);
 310         mlx5_del_flow_rules(flow->rule);
 311         mlx5_fc_destroy(priv->mdev, counter);
 312
 313         if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
 314                 mlx5_destroy_flow_table(priv->fs.tc.t);
 315                 priv->fs.tc.t = NULL;
 316         }
 317
 318         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
 319                 mlx5e_detach_mod_hdr(priv, flow);
 320 }
 321
 322 static void mlx5e_detach_encap(struct mlx5e_priv *priv,
 323                                struct mlx5e_tc_flow *flow);
 324
 325 static struct mlx5_flow_handle *
 326 mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
 327                       struct mlx5e_tc_flow_parse_attr *parse_attr,
 328                       struct mlx5e_tc_flow *flow)
 329 {
 330         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 331         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
 332         struct mlx5_flow_handle *rule;
 333         int err;
 334
 335         err = mlx5_eswitch_add_vlan_action(esw, attr);
 336         if (err) {
 337                 rule = ERR_PTR(err);
 338                 goto err_add_vlan;
 339         }
 340
 341         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
 342                 err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
 343                 kfree(parse_attr->mod_hdr_actions);
 344                 if (err) {
 345                         rule = ERR_PTR(err);
 346                         goto err_mod_hdr;
 347                 }
 348         }
 349
 350         rule = mlx5_eswitch_add_offloaded_rule(esw, &parse_attr->spec, attr);
 351         if (IS_ERR(rule))
 352                 goto err_add_rule;
 353
 354         return rule;
 355
 356 err_add_rule:
 357         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
 358                 mlx5e_detach_mod_hdr(priv, flow);
 359 err_mod_hdr:
 360         mlx5_eswitch_del_vlan_action(esw, attr);
 361 err_add_vlan:
 362         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP)
 363                 mlx5e_detach_encap(priv, flow);
 364         return rule;
 365 }
 366
 367 static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
 368                                   struct mlx5e_tc_flow *flow)
 369 {
 370         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 371         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
 372
 373         if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
 374                 flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
 375                 mlx5_eswitch_del_offloaded_rule(esw, flow->rule, attr);
 376         }
 377
 378         mlx5_eswitch_del_vlan_action(esw, attr);
 379
 380         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP) {
 381                 mlx5e_detach_encap(priv, flow);
 382                 kvfree(attr->parse_attr);
 383         }
 384
 385         if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
 386                 mlx5e_detach_mod_hdr(priv, flow);
 387 }
 388
 389 void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
 390                               struct mlx5e_encap_entry *e)
 391 {
 392         struct mlx5e_tc_flow *flow;
 393         int err;
 394
 395         err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
 396                                e->encap_size, e->encap_header,
 397                                &e->encap_id);
 398         if (err) {
 399                 mlx5_core_warn(priv->mdev, "Failed to offload cached encapsulation header, %d\n",
 400                                err);
 401                 return;
 402         }
 403         e->flags |= MLX5_ENCAP_ENTRY_VALID;
 404         mlx5e_rep_queue_neigh_stats_work(priv);
 405
 406         list_for_each_entry(flow, &e->flows, encap) {
 407                 flow->esw_attr->encap_id = e->encap_id;
 408                 flow->rule = mlx5e_tc_add_fdb_flow(priv,
 409                                                    flow->esw_attr->parse_attr,
 410                                                    flow);
 411                 if (IS_ERR(flow->rule)) {
 412                         err = PTR_ERR(flow->rule);
 413                         mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
 414                                        err);
 415                         continue;
 416                 }
 417                 flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
 418         }
 419 }
 420
 421 void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
 422                               struct mlx5e_encap_entry *e)
 423 {
 424         struct mlx5e_tc_flow *flow;
 425         struct mlx5_fc *counter;
 426
 427         list_for_each_entry(flow, &e->flows, encap) {
 428                 if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
 429                         flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
 430                         counter = mlx5_flow_rule_counter(flow->rule);
 431                         mlx5_del_flow_rules(flow->rule);
 432                         mlx5_fc_destroy(priv->mdev, counter);
 433                 }
 434         }
 435
 436         if (e->flags & MLX5_ENCAP_ENTRY_VALID) {
 437                 e->flags &= ~MLX5_ENCAP_ENTRY_VALID;
 438                 mlx5_encap_dealloc(priv->mdev, e->encap_id);
 439         }
 440 }
 441
 442 void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
 443 {
 444         struct mlx5e_neigh *m_neigh = &nhe->m_neigh;
 445         u64 bytes, packets, lastuse = 0;
 446         struct mlx5e_tc_flow *flow;
 447         struct mlx5e_encap_entry *e;
 448         struct mlx5_fc *counter;
 449         struct neigh_table *tbl;
 450         bool neigh_used = false;
 451         struct neighbour *n;
 452
 453         if (m_neigh->family == AF_INET)
 454                 tbl = &arp_tbl;
 455 #if IS_ENABLED(CONFIG_IPV6)
 456         else if (m_neigh->family == AF_INET6)
 457                 tbl = ipv6_stub->nd_tbl;
 458 #endif
 459         else
 460                 return;
 461
 462         list_for_each_entry(e, &nhe->encap_list, encap_list) {
 463                 if (!(e->flags & MLX5_ENCAP_ENTRY_VALID))
 464                         continue;
 465                 list_for_each_entry(flow, &e->flows, encap) {
 466                         if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
 467                                 counter = mlx5_flow_rule_counter(flow->rule);
 468                                 mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
 469                                 if (time_after((unsigned long)lastuse, nhe->reported_lastuse)) {
 470                                         neigh_used = true;
 471                                         break;
 472                                 }
 473                         }
 474                 }
 475         }
 476
 477         if (neigh_used) {
 478                 nhe->reported_lastuse = jiffies;
 479
 480                 /* find the relevant neigh according to the cached device and
 481                  * dst ip pair
 482                  */
 483                 n = neigh_lookup(tbl, &m_neigh->dst_ip, m_neigh->dev);
 484                 if (!n) {
 485                         WARN(1, "The neighbour already freed\n");
 486                         return;
 487                 }
 488
 489                 neigh_event_send(n, NULL);
 490                 neigh_release(n);
 491         }
 492 }
 493
 494 static void mlx5e_detach_encap(struct mlx5e_priv *priv,
 495                                struct mlx5e_tc_flow *flow)
 496 {
 497         struct list_head *next = flow->encap.next;
 498
 499         list_del(&flow->encap);
 500         if (list_empty(next)) {
 501                 struct mlx5e_encap_entry *e;
 502
 503                 e = list_entry(next, struct mlx5e_encap_entry, flows);
 504                 mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
 505
 506                 if (e->flags & MLX5_ENCAP_ENTRY_VALID)
 507                         mlx5_encap_dealloc(priv->mdev, e->encap_id);
 508
 509                 hash_del_rcu(&e->encap_hlist);
 510                 kfree(e->encap_header);
 511                 kfree(e);
 512         }
 513 }
 514
 515 static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
 516                               struct mlx5e_tc_flow *flow)
 517 {
 518         if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
 519                 mlx5e_tc_del_fdb_flow(priv, flow);
 520         else
 521                 mlx5e_tc_del_nic_flow(priv, flow);
 522 }
 523
 524 static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
 525                              struct tc_cls_flower_offload *f)
 526 {
 527         void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
 528                                        outer_headers);
 529         void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
 530                                        outer_headers);
 531         void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
 532                                     misc_parameters);
 533         void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
 534                                     misc_parameters);
 535
 536         MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
 537         MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
 538
 539         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
 540                 struct flow_dissector_key_keyid *key =
 541                         skb_flow_dissector_target(f->dissector,
 542                                                   FLOW_DISSECTOR_KEY_ENC_KEYID,
 543                                                   f->key);
 544                 struct flow_dissector_key_keyid *mask =
 545                         skb_flow_dissector_target(f->dissector,
 546                                                   FLOW_DISSECTOR_KEY_ENC_KEYID,
 547                                                   f->mask);
 548                 MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
 549                          be32_to_cpu(mask->keyid));
 550                 MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
 551                          be32_to_cpu(key->keyid));
 552         }
 553 }
 554
 555 static int parse_tunnel_attr(struct mlx5e_priv *priv,
 556                              struct mlx5_flow_spec *spec,
 557                              struct tc_cls_flower_offload *f)
 558 {
 559         void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
 560                                        outer_headers);
 561         void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
 562                                        outer_headers);
 563
 564         struct flow_dissector_key_control *enc_control =
 565                 skb_flow_dissector_target(f->dissector,
 566                                           FLOW_DISSECTOR_KEY_ENC_CONTROL,
 567                                           f->key);
 568
 569         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
 570                 struct flow_dissector_key_ports *key =
 571                         skb_flow_dissector_target(f->dissector,
 572                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 573                                                   f->key);
 574                 struct flow_dissector_key_ports *mask =
 575                         skb_flow_dissector_target(f->dissector,
 576                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 577                                                   f->mask);
 578                 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 579                 struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
 580                 struct mlx5e_priv *up_priv = netdev_priv(up_dev);
 581
 582                 /* Full udp dst port must be given */
 583                 if (memchr_inv(&mask->dst, 0xff, sizeof(mask->dst)))
 584                         goto vxlan_match_offload_err;
 585
 586                 if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->dst)) &&
 587                     MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
 588                         parse_vxlan_attr(spec, f);
 589                 else {
 590                         netdev_warn(priv->netdev,
 591                                     "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->dst));
 592                         return -EOPNOTSUPP;
 593                 }
 594
 595                 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 596                          udp_dport, ntohs(mask->dst));
 597                 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 598                          udp_dport, ntohs(key->dst));
 599
 600                 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 601                          udp_sport, ntohs(mask->src));
 602                 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 603                          udp_sport, ntohs(key->src));
 604         } else { /* udp dst port must be given */
 605 vxlan_match_offload_err:
 606                 netdev_warn(priv->netdev,
 607                             "IP tunnel decap offload supported only for vxlan, must set UDP dport\n");
 608                 return -EOPNOTSUPP;
 609         }
 610
 611         if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
 612                 struct flow_dissector_key_ipv4_addrs *key =
 613                         skb_flow_dissector_target(f->dissector,
 614                                                   FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 615                                                   f->key);
 616                 struct flow_dissector_key_ipv4_addrs *mask =
 617                         skb_flow_dissector_target(f->dissector,
 618                                                   FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 619                                                   f->mask);
 620                 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 621                          src_ipv4_src_ipv6.ipv4_layout.ipv4,
 622                          ntohl(mask->src));
 623                 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 624                          src_ipv4_src_ipv6.ipv4_layout.ipv4,
 625                          ntohl(key->src));
 626
 627                 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 628                          dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
 629                          ntohl(mask->dst));
 630                 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 631                          dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
 632                          ntohl(key->dst));
 633
 634                 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
 635                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IP);
 636         } else if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
 637                 struct flow_dissector_key_ipv6_addrs *key =
 638                         skb_flow_dissector_target(f->dissector,
 639                                                   FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
 640                                                   f->key);
 641                 struct flow_dissector_key_ipv6_addrs *mask =
 642                         skb_flow_dissector_target(f->dissector,
 643                                                   FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
 644                                                   f->mask);
 645
 646                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 647                                     src_ipv4_src_ipv6.ipv6_layout.ipv6),
 648                        &mask->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
 649                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 650                                     src_ipv4_src_ipv6.ipv6_layout.ipv6),
 651                        &key->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
 652
 653                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 654                                     dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
 655                        &mask->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
 656                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 657                                     dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
 658                        &key->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
 659
 660                 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
 661                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IPV6);
 662         }
 663
 664         /* Enforce DMAC when offloading incoming tunneled flows.
 665          * Flow counters require a match on the DMAC.
 666          */
 667         MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_47_16);
 668         MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_15_0);
 669         ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 670                                      dmac_47_16), priv->netdev->dev_addr);
 671
 672         /* let software handle IP fragments */
 673         MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
 674         MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag, 0);
 675
 676         return 0;
 677 }
 678
 679 static int __parse_cls_flower(struct mlx5e_priv *priv,
 680                               struct mlx5_flow_spec *spec,
 681                               struct tc_cls_flower_offload *f,
 682                               u8 *min_inline)
 683 {
 684         void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
 685                                        outer_headers);
 686         void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
 687                                        outer_headers);
 688         u16 addr_type = 0;
 689         u8 ip_proto = 0;
 690
 691         *min_inline = MLX5_INLINE_MODE_L2;
 692
 693         if (f->dissector->used_keys &
 694             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
 695               BIT(FLOW_DISSECTOR_KEY_BASIC) |
 696               BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
 697               BIT(FLOW_DISSECTOR_KEY_VLAN) |
 698               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
 699               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
 700               BIT(FLOW_DISSECTOR_KEY_PORTS) |
 701               BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
 702               BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) |
 703               BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
 704               BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) |
 705               BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) |
 706               BIT(FLOW_DISSECTOR_KEY_TCP) |
 707               BIT(FLOW_DISSECTOR_KEY_IP))) {
 708                 netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
 709                             f->dissector->used_keys);
 710                 return -EOPNOTSUPP;
 711         }
 712
 713         if ((dissector_uses_key(f->dissector,
 714                                 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
 715              dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
 716              dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) &&
 717             dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
 718                 struct flow_dissector_key_control *key =
 719                         skb_flow_dissector_target(f->dissector,
 720                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 721                                                   f->key);
 722                 switch (key->addr_type) {
 723                 case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
 724                 case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
 725                         if (parse_tunnel_attr(priv, spec, f))
 726                                 return -EOPNOTSUPP;
 727                         break;
 728                 default:
 729                         return -EOPNOTSUPP;
 730                 }
 731
 732                 /* In decap flow, header pointers should point to the inner
 733                  * headers, outer header were already set by parse_tunnel_attr
 734                  */
 735                 headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
 736                                          inner_headers);
 737                 headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
 738                                          inner_headers);
 739         }
 740
 741         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
 742                 struct flow_dissector_key_control *key =
 743                         skb_flow_dissector_target(f->dissector,
 744                                                   FLOW_DISSECTOR_KEY_CONTROL,
 745                                                   f->key);
 746
 747                 struct flow_dissector_key_control *mask =
 748                         skb_flow_dissector_target(f->dissector,
 749                                                   FLOW_DISSECTOR_KEY_CONTROL,
 750                                                   f->mask);
 751                 addr_type = key->addr_type;
 752
 753                 if (mask->flags & FLOW_DIS_IS_FRAGMENT) {
 754                         MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
 755                         MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,
 756                                  key->flags & FLOW_DIS_IS_FRAGMENT);
 757
 758                         /* the HW doesn't need L3 inline to match on frag=no */
 759                         if (key->flags & FLOW_DIS_IS_FRAGMENT)
 760                                 *min_inline = MLX5_INLINE_MODE_IP;
 761                 }
 762         }
 763
 764         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 765                 struct flow_dissector_key_basic *key =
 766                         skb_flow_dissector_target(f->dissector,
 767                                                   FLOW_DISSECTOR_KEY_BASIC,
 768                                                   f->key);
 769                 struct flow_dissector_key_basic *mask =
 770                         skb_flow_dissector_target(f->dissector,
 771                                                   FLOW_DISSECTOR_KEY_BASIC,
 772                                                   f->mask);
 773                 ip_proto = key->ip_proto;
 774
 775                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
 776                          ntohs(mask->n_proto));
 777                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
 778                          ntohs(key->n_proto));
 779
 780                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
 781                          mask->ip_proto);
 782                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
 783                          key->ip_proto);
 784
 785                 if (mask->ip_proto)
 786                         *min_inline = MLX5_INLINE_MODE_IP;
 787         }
 788
 789         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
 790                 struct flow_dissector_key_eth_addrs *key =
 791                         skb_flow_dissector_target(f->dissector,
 792                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
 793                                                   f->key);
 794                 struct flow_dissector_key_eth_addrs *mask =
 795                         skb_flow_dissector_target(f->dissector,
 796                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
 797                                                   f->mask);
 798
 799                 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 800                                              dmac_47_16),
 801                                 mask->dst);
 802                 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 803                                              dmac_47_16),
 804                                 key->dst);
 805
 806                 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 807                                              smac_47_16),
 808                                 mask->src);
 809                 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 810                                              smac_47_16),
 811                                 key->src);
 812         }
 813
 814         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
 815                 struct flow_dissector_key_vlan *key =
 816                         skb_flow_dissector_target(f->dissector,
 817                                                   FLOW_DISSECTOR_KEY_VLAN,
 818                                                   f->key);
 819                 struct flow_dissector_key_vlan *mask =
 820                         skb_flow_dissector_target(f->dissector,
 821                                                   FLOW_DISSECTOR_KEY_VLAN,
 822                                                   f->mask);
 823                 if (mask->vlan_id || mask->vlan_priority) {
 824                         MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1);
 825                         MLX5_SET(fte_match_set_lyr_2_4, headers_v, cvlan_tag, 1);
 826
 827                         MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_vid, mask->vlan_id);
 828                         MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid, key->vlan_id);
 829
 830                         MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_prio, mask->vlan_priority);
 831                         MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_prio, key->vlan_priority);
 832                 }
 833         }
 834
 835         if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
 836                 struct flow_dissector_key_ipv4_addrs *key =
 837                         skb_flow_dissector_target(f->dissector,
 838                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
 839                                                   f->key);
 840                 struct flow_dissector_key_ipv4_addrs *mask =
 841                         skb_flow_dissector_target(f->dissector,
 842                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
 843                                                   f->mask);
 844
 845                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 846                                     src_ipv4_src_ipv6.ipv4_layout.ipv4),
 847                        &mask->src, sizeof(mask->src));
 848                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 849                                     src_ipv4_src_ipv6.ipv4_layout.ipv4),
 850                        &key->src, sizeof(key->src));
 851                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 852                                     dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
 853                        &mask->dst, sizeof(mask->dst));
 854                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 855                                     dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
 856                        &key->dst, sizeof(key->dst));
 857
 858                 if (mask->src || mask->dst)
 859                         *min_inline = MLX5_INLINE_MODE_IP;
 860         }
 861
 862         if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
 863                 struct flow_dissector_key_ipv6_addrs *key =
 864                         skb_flow_dissector_target(f->dissector,
 865                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
 866                                                   f->key);
 867                 struct flow_dissector_key_ipv6_addrs *mask =
 868                         skb_flow_dissector_target(f->dissector,
 869                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
 870                                                   f->mask);
 871
 872                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 873                                     src_ipv4_src_ipv6.ipv6_layout.ipv6),
 874                        &mask->src, sizeof(mask->src));
 875                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 876                                     src_ipv4_src_ipv6.ipv6_layout.ipv6),
 877                        &key->src, sizeof(key->src));
 878
 879                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
 880                                     dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
 881                        &mask->dst, sizeof(mask->dst));
 882                 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
 883                                     dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
 884                        &key->dst, sizeof(key->dst));
 885
 886                 if (ipv6_addr_type(&mask->src) != IPV6_ADDR_ANY ||
 887                     ipv6_addr_type(&mask->dst) != IPV6_ADDR_ANY)
 888                         *min_inline = MLX5_INLINE_MODE_IP;
 889         }
 890
 891         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_IP)) {
 892                 struct flow_dissector_key_ip *key =
 893                         skb_flow_dissector_target(f->dissector,
 894                                                   FLOW_DISSECTOR_KEY_IP,
 895                                                   f->key);
 896                 struct flow_dissector_key_ip *mask =
 897                         skb_flow_dissector_target(f->dissector,
 898                                                   FLOW_DISSECTOR_KEY_IP,
 899                                                   f->mask);
 900
 901                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn, mask->tos & 0x3);
 902                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn, key->tos & 0x3);
 903
 904                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp, mask->tos >> 2);
 905                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp, key->tos  >> 2);
 906
 907                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit, mask->ttl);
 908                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit, key->ttl);
 909
 910                 if (mask->ttl &&
 911                     !MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
 912                                                 ft_field_support.outer_ipv4_ttl))
 913                         return -EOPNOTSUPP;
 914
 915                 if (mask->tos || mask->ttl)
 916                         *min_inline = MLX5_INLINE_MODE_IP;
 917         }
 918
 919         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
 920                 struct flow_dissector_key_ports *key =
 921                         skb_flow_dissector_target(f->dissector,
 922                                                   FLOW_DISSECTOR_KEY_PORTS,
 923                                                   f->key);
 924                 struct flow_dissector_key_ports *mask =
 925                         skb_flow_dissector_target(f->dissector,
 926                                                   FLOW_DISSECTOR_KEY_PORTS,
 927                                                   f->mask);
 928                 switch (ip_proto) {
 929                 case IPPROTO_TCP:
 930                         MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 931                                  tcp_sport, ntohs(mask->src));
 932                         MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 933                                  tcp_sport, ntohs(key->src));
 934
 935                         MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 936                                  tcp_dport, ntohs(mask->dst));
 937                         MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 938                                  tcp_dport, ntohs(key->dst));
 939                         break;
 940
 941                 case IPPROTO_UDP:
 942                         MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 943                                  udp_sport, ntohs(mask->src));
 944                         MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 945                                  udp_sport, ntohs(key->src));
 946
 947                         MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 948                                  udp_dport, ntohs(mask->dst));
 949                         MLX5_SET(fte_match_set_lyr_2_4, headers_v,
 950                                  udp_dport, ntohs(key->dst));
 951                         break;
 952                 default:
 953                         netdev_err(priv->netdev,
 954                                    "Only UDP and TCP transport are supported\n");
 955                         return -EINVAL;
 956                 }
 957
 958                 if (mask->src || mask->dst)
 959                         *min_inline = MLX5_INLINE_MODE_TCP_UDP;
 960         }
 961
 962         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP)) {
 963                 struct flow_dissector_key_tcp *key =
 964                         skb_flow_dissector_target(f->dissector,
 965                                                   FLOW_DISSECTOR_KEY_TCP,
 966                                                   f->key);
 967                 struct flow_dissector_key_tcp *mask =
 968                         skb_flow_dissector_target(f->dissector,
 969                                                   FLOW_DISSECTOR_KEY_TCP,
 970                                                   f->mask);
 971
 972                 MLX5_SET(fte_match_set_lyr_2_4, headers_c, tcp_flags,
 973                          ntohs(mask->flags));
 974                 MLX5_SET(fte_match_set_lyr_2_4, headers_v, tcp_flags,
 975                          ntohs(key->flags));
 976
 977                 if (mask->flags)
 978                         *min_inline = MLX5_INLINE_MODE_TCP_UDP;
 979         }
 980
 981         return 0;
 982 }
 983
 984 static int parse_cls_flower(struct mlx5e_priv *priv,
 985                             struct mlx5e_tc_flow *flow,
 986                             struct mlx5_flow_spec *spec,
 987                             struct tc_cls_flower_offload *f)
 988 {
 989         struct mlx5_core_dev *dev = priv->mdev;
 990         struct mlx5_eswitch *esw = dev->priv.eswitch;
 991         struct mlx5e_rep_priv *rpriv = priv->ppriv;
 992         struct mlx5_eswitch_rep *rep;
 993         u8 min_inline;
 994         int err;
 995
 996         err = __parse_cls_flower(priv, spec, f, &min_inline);
 997
 998         if (!err && (flow->flags & MLX5E_TC_FLOW_ESWITCH)) {
 999                 rep = rpriv->rep;
1000                 if (rep->vport != FDB_UPLINK_VPORT &&
1001                     (esw->offloads.inline_mode != MLX5_INLINE_MODE_NONE &&
1002                     esw->offloads.inline_mode < min_inline)) {
1003                         netdev_warn(priv->netdev,
1004                                     "Flow is not offloaded due to min inline setting, required %d actual %d\n",
1005                                     min_inline, esw->offloads.inline_mode);
1006                         return -EOPNOTSUPP;
1007                 }
1008         }
1009
1010         return err;
1011 }
1012
1013 struct pedit_headers {
1014         struct ethhdr  eth;
1015         struct iphdr   ip4;
1016         struct ipv6hdr ip6;
1017         struct tcphdr  tcp;
1018         struct udphdr  udp;
1019 };
1020
1021 static int pedit_header_offsets[] = {
1022         [TCA_PEDIT_KEY_EX_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth),
1023         [TCA_PEDIT_KEY_EX_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4),
1024         [TCA_PEDIT_KEY_EX_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6),
1025         [TCA_PEDIT_KEY_EX_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp),
1026         [TCA_PEDIT_KEY_EX_HDR_TYPE_UDP] = offsetof(struct pedit_headers, udp),
1027 };
1028
1029 #define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype])
1030
1031 static int set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset,
1032                          struct pedit_headers *masks,
1033                          struct pedit_headers *vals)
1034 {
1035         u32 *curr_pmask, *curr_pval;
1036
1037         if (hdr_type >= __PEDIT_HDR_TYPE_MAX)
1038                 goto out_err;
1039
1040         curr_pmask = (u32 *)(pedit_header(masks, hdr_type) + offset);
1041         curr_pval  = (u32 *)(pedit_header(vals, hdr_type) + offset);
1042
1043         if (*curr_pmask & mask)  /* disallow acting twice on the same location */
1044                 goto out_err;
1045
1046         *curr_pmask |= mask;
1047         *curr_pval  |= (val & mask);
1048
1049         return 0;
1050
1051 out_err:
1052         return -EOPNOTSUPP;
1053 }
1054
1055 struct mlx5_fields {
1056         u8  field;
1057         u8  size;
1058         u32 offset;
1059 };
1060
1061 #define OFFLOAD(fw_field, size, field, off) \
1062                 {MLX5_ACTION_IN_FIELD_OUT_ ## fw_field, size, offsetof(struct pedit_headers, field) + (off)}
1063
1064 static struct mlx5_fields fields[] = {
1065         OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
1066         OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
1067         OFFLOAD(DMAC_15_0,  2, eth.h_dest[4], 0),
1068         OFFLOAD(SMAC_47_16, 4, eth.h_source[0], 0),
1069         OFFLOAD(SMAC_15_0,  2, eth.h_source[4], 0),
1070         OFFLOAD(ETHERTYPE,  2, eth.h_proto, 0),
1071
1072         OFFLOAD(IP_TTL, 1, ip4.ttl,   0),
1073         OFFLOAD(SIPV4,  4, ip4.saddr, 0),
1074         OFFLOAD(DIPV4,  4, ip4.daddr, 0),
1075
1076         OFFLOAD(SIPV6_127_96, 4, ip6.saddr.s6_addr32[0], 0),
1077         OFFLOAD(SIPV6_95_64,  4, ip6.saddr.s6_addr32[1], 0),
1078         OFFLOAD(SIPV6_63_32,  4, ip6.saddr.s6_addr32[2], 0),
1079         OFFLOAD(SIPV6_31_0,   4, ip6.saddr.s6_addr32[3], 0),
1080         OFFLOAD(DIPV6_127_96, 4, ip6.daddr.s6_addr32[0], 0),
1081         OFFLOAD(DIPV6_95_64,  4, ip6.daddr.s6_addr32[1], 0),
1082         OFFLOAD(DIPV6_63_32,  4, ip6.daddr.s6_addr32[2], 0),
1083         OFFLOAD(DIPV6_31_0,   4, ip6.daddr.s6_addr32[3], 0),
1084         OFFLOAD(IPV6_HOPLIMIT, 1, ip6.hop_limit, 0),
1085
1086         OFFLOAD(TCP_SPORT, 2, tcp.source,  0),
1087         OFFLOAD(TCP_DPORT, 2, tcp.dest,    0),
1088         OFFLOAD(TCP_FLAGS, 1, tcp.ack_seq, 5),
1089
1090         OFFLOAD(UDP_SPORT, 2, udp.source, 0),
1091         OFFLOAD(UDP_DPORT, 2, udp.dest,   0),
1092 };
1093
1094 /* On input attr->num_mod_hdr_actions tells how many HW actions can be parsed at
1095  * max from the SW pedit action. On success, it says how many HW actions were
1096  * actually parsed.
1097  */
1098 static int offload_pedit_fields(struct pedit_headers *masks,
1099                                 struct pedit_headers *vals,
1100                                 struct mlx5e_tc_flow_parse_attr *parse_attr)
1101 {
1102         struct pedit_headers *set_masks, *add_masks, *set_vals, *add_vals;
1103         int i, action_size, nactions, max_actions, first, last, next_z;
1104         void *s_masks_p, *a_masks_p, *vals_p;
1105         struct mlx5_fields *f;
1106         u8 cmd, field_bsize;
1107         u32 s_mask, a_mask;
1108         unsigned long mask;
1109         __be32 mask_be32;
1110         __be16 mask_be16;
1111         void *action;
1112
1113         set_masks = &masks[TCA_PEDIT_KEY_EX_CMD_SET];
1114         add_masks = &masks[TCA_PEDIT_KEY_EX_CMD_ADD];
1115         set_vals = &vals[TCA_PEDIT_KEY_EX_CMD_SET];
1116         add_vals = &vals[TCA_PEDIT_KEY_EX_CMD_ADD];
1117
1118         action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
1119         action = parse_attr->mod_hdr_actions;
1120         max_actions = parse_attr->num_mod_hdr_actions;
1121         nactions = 0;
1122
1123         for (i = 0; i < ARRAY_SIZE(fields); i++) {
1124                 f = &fields[i];
1125                 /* avoid seeing bits set from previous iterations */
1126                 s_mask = 0;
1127                 a_mask = 0;
1128
1129                 s_masks_p = (void *)set_masks + f->offset;
1130                 a_masks_p = (void *)add_masks + f->offset;
1131
1132                 memcpy(&s_mask, s_masks_p, f->size);
1133                 memcpy(&a_mask, a_masks_p, f->size);
1134
1135                 if (!s_mask && !a_mask) /* nothing to offload here */
1136                         continue;
1137
1138                 if (s_mask && a_mask) {
1139                         printk(KERN_WARNING "mlx5: can't set and add to the same HW field (%x)\n", f->field);
1140                         return -EOPNOTSUPP;
1141                 }
1142
1143                 if (nactions == max_actions) {
1144                         printk(KERN_WARNING "mlx5: parsed %d pedit actions, can't do more\n", nactions);
1145                         return -EOPNOTSUPP;
1146                 }
1147
1148                 if (s_mask) {
1149                         cmd  = MLX5_ACTION_TYPE_SET;
1150                         mask = s_mask;
1151                         vals_p = (void *)set_vals + f->offset;
1152                         /* clear to denote we consumed this field */
1153                         memset(s_masks_p, 0, f->size);
1154                 } else {
1155                         cmd  = MLX5_ACTION_TYPE_ADD;
1156                         mask = a_mask;
1157                         vals_p = (void *)add_vals + f->offset;
1158                         /* clear to denote we consumed this field */
1159                         memset(a_masks_p, 0, f->size);
1160                 }
1161
1162                 field_bsize = f->size * BITS_PER_BYTE;
1163
1164                 if (field_bsize == 32) {
1165                         mask_be32 = *(__be32 *)&mask;
1166                         mask = (__force unsigned long)cpu_to_le32(be32_to_cpu(mask_be32));
1167                 } else if (field_bsize == 16) {
1168                         mask_be16 = *(__be16 *)&mask;
1169                         mask = (__force unsigned long)cpu_to_le16(be16_to_cpu(mask_be16));
1170                 }
1171
1172                 first = find_first_bit(&mask, field_bsize);
1173                 next_z = find_next_zero_bit(&mask, field_bsize, first);
1174                 last  = find_last_bit(&mask, field_bsize);
1175                 if (first < next_z && next_z < last) {
1176                         printk(KERN_WARNING "mlx5: rewrite of few sub-fields (mask %lx) isn't offloaded\n",
1177                                mask);
1178                         return -EOPNOTSUPP;
1179                 }
1180
1181                 MLX5_SET(set_action_in, action, action_type, cmd);
1182                 MLX5_SET(set_action_in, action, field, f->field);
1183
1184                 if (cmd == MLX5_ACTION_TYPE_SET) {
1185                         MLX5_SET(set_action_in, action, offset, first);
1186                         /* length is num of bits to be written, zero means length of 32 */
1187                         MLX5_SET(set_action_in, action, length, (last - first + 1));
1188                 }
1189
1190                 if (field_bsize == 32)
1191                         MLX5_SET(set_action_in, action, data, ntohl(*(__be32 *)vals_p) >> first);
1192                 else if (field_bsize == 16)
1193                         MLX5_SET(set_action_in, action, data, ntohs(*(__be16 *)vals_p) >> first);
1194                 else if (field_bsize == 8)
1195                         MLX5_SET(set_action_in, action, data, *(u8 *)vals_p >> first);
1196
1197                 action += action_size;
1198                 nactions++;
1199         }
1200
1201         parse_attr->num_mod_hdr_actions = nactions;
1202         return 0;
1203 }
1204
1205 static int alloc_mod_hdr_actions(struct mlx5e_priv *priv,
1206                                  const struct tc_action *a, int namespace,
1207                                  struct mlx5e_tc_flow_parse_attr *parse_attr)
1208 {
1209         int nkeys, action_size, max_actions;
1210
1211         nkeys = tcf_pedit_nkeys(a);
1212         action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
1213
1214         if (namespace == MLX5_FLOW_NAMESPACE_FDB) /* FDB offloading */
1215                 max_actions = MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, max_modify_header_actions);
1216         else /* namespace is MLX5_FLOW_NAMESPACE_KERNEL - NIC offloading */
1217                 max_actions = MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, max_modify_header_actions);
1218
1219         /* can get up to crazingly 16 HW actions in 32 bits pedit SW key */
1220         max_actions = min(max_actions, nkeys * 16);
1221
1222         parse_attr->mod_hdr_actions = kcalloc(max_actions, action_size, GFP_KERNEL);
1223         if (!parse_attr->mod_hdr_actions)
1224                 return -ENOMEM;
1225
1226         parse_attr->num_mod_hdr_actions = max_actions;
1227         return 0;
1228 }
1229
1230 static const struct pedit_headers zero_masks = {};
1231
1232 static int parse_tc_pedit_action(struct mlx5e_priv *priv,
1233                                  const struct tc_action *a, int namespace,
1234                                  struct mlx5e_tc_flow_parse_attr *parse_attr)
1235 {
1236         struct pedit_headers masks[__PEDIT_CMD_MAX], vals[__PEDIT_CMD_MAX], *cmd_masks;
1237         int nkeys, i, err = -EOPNOTSUPP;
1238         u32 mask, val, offset;
1239         u8 cmd, htype;
1240
1241         nkeys = tcf_pedit_nkeys(a);
1242
1243         memset(masks, 0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
1244         memset(vals,  0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
1245
1246         for (i = 0; i < nkeys; i++) {
1247                 htype = tcf_pedit_htype(a, i);
1248                 cmd = tcf_pedit_cmd(a, i);
1249                 err = -EOPNOTSUPP; /* can't be all optimistic */
1250
1251                 if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK) {
1252                         printk(KERN_WARNING "mlx5: legacy pedit isn't offloaded\n");
1253                         goto out_err;
1254                 }
1255
1256                 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET && cmd != TCA_PEDIT_KEY_EX_CMD_ADD) {
1257                         printk(KERN_WARNING "mlx5: pedit cmd %d isn't offloaded\n", cmd);
1258                         goto out_err;
1259                 }
1260
1261                 mask = tcf_pedit_mask(a, i);
1262                 val = tcf_pedit_val(a, i);
1263                 offset = tcf_pedit_offset(a, i);
1264
1265                 err = set_pedit_val(htype, ~mask, val, offset, &masks[cmd], &vals[cmd]);
1266                 if (err)
1267                         goto out_err;
1268         }
1269
1270         err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr);
1271         if (err)
1272                 goto out_err;
1273
1274         err = offload_pedit_fields(masks, vals, parse_attr);
1275         if (err < 0)
1276                 goto out_dealloc_parsed_actions;
1277
1278         for (cmd = 0; cmd < __PEDIT_CMD_MAX; cmd++) {
1279                 cmd_masks = &masks[cmd];
1280                 if (memcmp(cmd_masks, &zero_masks, sizeof(zero_masks))) {
1281                         printk(KERN_WARNING "mlx5: attempt to offload an unsupported field (cmd %d)\n",
1282                                cmd);
1283                         print_hex_dump(KERN_WARNING, "mask: ", DUMP_PREFIX_ADDRESS,
1284                                        16, 1, cmd_masks, sizeof(zero_masks), true);
1285                         err = -EOPNOTSUPP;
1286                         goto out_dealloc_parsed_actions;
1287                 }
1288         }
1289
1290         return 0;
1291
1292 out_dealloc_parsed_actions:
1293         kfree(parse_attr->mod_hdr_actions);
1294 out_err:
1295         return err;
1296 }
1297
1298 static bool csum_offload_supported(struct mlx5e_priv *priv, u32 action, u32 update_flags)
1299 {
1300         u32 prot_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR | TCA_CSUM_UPDATE_FLAG_TCP |
1301                          TCA_CSUM_UPDATE_FLAG_UDP;
1302
1303         /*  The HW recalcs checksums only if re-writing headers */
1304         if (!(action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)) {
1305                 netdev_warn(priv->netdev,
1306                             "TC csum action is only offloaded with pedit\n");
1307                 return false;
1308         }
1309
1310         if (update_flags & ~prot_flags) {
1311                 netdev_warn(priv->netdev,
1312                             "can't offload TC csum action for some header/s - flags %#x\n",
1313                             update_flags);
1314                 return false;
1315         }
1316
1317         return true;
1318 }
1319
1320 static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
1321                                 struct mlx5e_tc_flow_parse_attr *parse_attr,
1322                                 struct mlx5e_tc_flow *flow)
1323 {
1324         struct mlx5_nic_flow_attr *attr = flow->nic_attr;
1325         const struct tc_action *a;
1326         LIST_HEAD(actions);
1327         int err;
1328
1329         if (!tcf_exts_has_actions(exts))
1330                 return -EINVAL;
1331
1332         attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
1333         attr->action = 0;
1334
1335         tcf_exts_to_list(exts, &actions);
1336         list_for_each_entry(a, &actions, list) {
1337                 if (is_tcf_gact_shot(a)) {
1338                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
1339                         if (MLX5_CAP_FLOWTABLE(priv->mdev,
1340                                                flow_table_properties_nic_receive.flow_counter))
1341                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
1342                         continue;
1343                 }
1344
1345                 if (is_tcf_pedit(a)) {
1346                         err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_KERNEL,
1347                                                     parse_attr);
1348                         if (err)
1349                                 return err;
1350
1351                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
1352                                         MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
1353                         continue;
1354                 }
1355
1356                 if (is_tcf_csum(a)) {
1357                         if (csum_offload_supported(priv, attr->action,
1358                                                    tcf_csum_update_flags(a)))
1359                                 continue;
1360
1361                         return -EOPNOTSUPP;
1362                 }
1363
1364                 if (is_tcf_skbedit_mark(a)) {
1365                         u32 mark = tcf_skbedit_mark(a);
1366
1367                         if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
1368                                 netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
1369                                             mark);
1370                                 return -EINVAL;
1371                         }
1372
1373                         attr->flow_tag = mark;
1374                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
1375                         continue;
1376                 }
1377
1378                 return -EINVAL;
1379         }
1380
1381         return 0;
1382 }
1383
1384 static inline int cmp_encap_info(struct ip_tunnel_key *a,
1385                                  struct ip_tunnel_key *b)
1386 {
1387         return memcmp(a, b, sizeof(*a));
1388 }
1389
1390 static inline int hash_encap_info(struct ip_tunnel_key *key)
1391 {
1392         return jhash(key, sizeof(*key), 0);
1393 }
1394
1395 static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
1396                                    struct net_device *mirred_dev,
1397                                    struct net_device **out_dev,
1398                                    struct flowi4 *fl4,
1399                                    struct neighbour **out_n,
1400                                    int *out_ttl)
1401 {
1402         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1403         struct rtable *rt;
1404         struct neighbour *n = NULL;
1405
1406 #if IS_ENABLED(CONFIG_INET)
1407         int ret;
1408
1409         rt = ip_route_output_key(dev_net(mirred_dev), fl4);
1410         ret = PTR_ERR_OR_ZERO(rt);
1411         if (ret)
1412                 return ret;
1413 #else
1414         return -EOPNOTSUPP;
1415 #endif
1416         /* if the egress device isn't on the same HW e-switch, we use the uplink */
1417         if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
1418                 *out_dev = mlx5_eswitch_get_uplink_netdev(esw);
1419         else
1420                 *out_dev = rt->dst.dev;
1421
1422         *out_ttl = ip4_dst_hoplimit(&rt->dst);
1423         n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
1424         ip_rt_put(rt);
1425         if (!n)
1426                 return -ENOMEM;
1427
1428         *out_n = n;
1429         return 0;
1430 }
1431
1432 static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
1433                                    struct net_device *mirred_dev,
1434                                    struct net_device **out_dev,
1435                                    struct flowi6 *fl6,
1436                                    struct neighbour **out_n,
1437                                    int *out_ttl)
1438 {
1439         struct neighbour *n = NULL;
1440         struct dst_entry *dst;
1441
1442 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
1443         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1444         int ret;
1445
1446         ret = ipv6_stub->ipv6_dst_lookup(dev_net(mirred_dev), NULL, &dst,
1447                                          fl6);
1448         if (ret < 0)
1449                 return ret;
1450
1451         *out_ttl = ip6_dst_hoplimit(dst);
1452
1453         /* if the egress device isn't on the same HW e-switch, we use the uplink */
1454         if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
1455                 *out_dev = mlx5_eswitch_get_uplink_netdev(esw);
1456         else
1457                 *out_dev = dst->dev;
1458 #else
1459         return -EOPNOTSUPP;
1460 #endif
1461
1462         n = dst_neigh_lookup(dst, &fl6->daddr);
1463         dst_release(dst);
1464         if (!n)
1465                 return -ENOMEM;
1466
1467         *out_n = n;
1468         return 0;
1469 }
1470
1471 static void gen_vxlan_header_ipv4(struct net_device *out_dev,
1472                                   char buf[], int encap_size,
1473                                   unsigned char h_dest[ETH_ALEN],
1474                                   int ttl,
1475                                   __be32 daddr,
1476                                   __be32 saddr,
1477                                   __be16 udp_dst_port,
1478                                   __be32 vx_vni)
1479 {
1480         struct ethhdr *eth = (struct ethhdr *)buf;
1481         struct iphdr  *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
1482         struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
1483         struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
1484
1485         memset(buf, 0, encap_size);
1486
1487         ether_addr_copy(eth->h_dest, h_dest);
1488         ether_addr_copy(eth->h_source, out_dev->dev_addr);
1489         eth->h_proto = htons(ETH_P_IP);
1490
1491         ip->daddr = daddr;
1492         ip->saddr = saddr;
1493
1494         ip->ttl = ttl;
1495         ip->protocol = IPPROTO_UDP;
1496         ip->version = 0x4;
1497         ip->ihl = 0x5;
1498
1499         udp->dest = udp_dst_port;
1500         vxh->vx_flags = VXLAN_HF_VNI;
1501         vxh->vx_vni = vxlan_vni_field(vx_vni);
1502 }
1503
1504 static void gen_vxlan_header_ipv6(struct net_device *out_dev,
1505                                   char buf[], int encap_size,
1506                                   unsigned char h_dest[ETH_ALEN],
1507                                   int ttl,
1508                                   struct in6_addr *daddr,
1509                                   struct in6_addr *saddr,
1510                                   __be16 udp_dst_port,
1511                                   __be32 vx_vni)
1512 {
1513         struct ethhdr *eth = (struct ethhdr *)buf;
1514         struct ipv6hdr *ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
1515         struct udphdr *udp = (struct udphdr *)((char *)ip6h + sizeof(struct ipv6hdr));
1516         struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
1517
1518         memset(buf, 0, encap_size);
1519
1520         ether_addr_copy(eth->h_dest, h_dest);
1521         ether_addr_copy(eth->h_source, out_dev->dev_addr);
1522         eth->h_proto = htons(ETH_P_IPV6);
1523
1524         ip6_flow_hdr(ip6h, 0, 0);
1525         /* the HW fills up ipv6 payload len */
1526         ip6h->nexthdr     = IPPROTO_UDP;
1527         ip6h->hop_limit   = ttl;
1528         ip6h->daddr       = *daddr;
1529         ip6h->saddr       = *saddr;
1530
1531         udp->dest = udp_dst_port;
1532         vxh->vx_flags = VXLAN_HF_VNI;
1533         vxh->vx_vni = vxlan_vni_field(vx_vni);
1534 }
1535
1536 static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
1537                                           struct net_device *mirred_dev,
1538                                           struct mlx5e_encap_entry *e)
1539 {
1540         int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
1541         int ipv4_encap_size = ETH_HLEN + sizeof(struct iphdr) + VXLAN_HLEN;
1542         struct ip_tunnel_key *tun_key = &e->tun_info.key;
1543         struct net_device *out_dev;
1544         struct neighbour *n = NULL;
1545         struct flowi4 fl4 = {};
1546         char *encap_header;
1547         int ttl, err;
1548         u8 nud_state;
1549
1550         if (max_encap_size < ipv4_encap_size) {
1551                 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
1552                                ipv4_encap_size, max_encap_size);
1553                 return -EOPNOTSUPP;
1554         }
1555
1556         encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
1557         if (!encap_header)
1558                 return -ENOMEM;
1559
1560         switch (e->tunnel_type) {
1561         case MLX5_HEADER_TYPE_VXLAN:
1562                 fl4.flowi4_proto = IPPROTO_UDP;
1563                 fl4.fl4_dport = tun_key->tp_dst;
1564                 break;
1565         default:
1566                 err = -EOPNOTSUPP;
1567                 goto out;
1568         }
1569         fl4.flowi4_tos = tun_key->tos;
1570         fl4.daddr = tun_key->u.ipv4.dst;
1571         fl4.saddr = tun_key->u.ipv4.src;
1572
1573         err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
1574                                       &fl4, &n, &ttl);
1575         if (err)
1576                 goto out;
1577
1578         /* used by mlx5e_detach_encap to lookup a neigh hash table
1579          * entry in the neigh hash table when a user deletes a rule
1580          */
1581         e->m_neigh.dev = n->dev;
1582         e->m_neigh.family = n->ops->family;
1583         memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
1584         e->out_dev = out_dev;
1585
1586         /* It's importent to add the neigh to the hash table before checking
1587          * the neigh validity state. So if we'll get a notification, in case the
1588          * neigh changes it's validity state, we would find the relevant neigh
1589          * in the hash.
1590          */
1591         err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
1592         if (err)
1593                 goto out;
1594
1595         read_lock_bh(&n->lock);
1596         nud_state = n->nud_state;
1597         ether_addr_copy(e->h_dest, n->ha);
1598         read_unlock_bh(&n->lock);
1599
1600         switch (e->tunnel_type) {
1601         case MLX5_HEADER_TYPE_VXLAN:
1602                 gen_vxlan_header_ipv4(out_dev, encap_header,
1603                                       ipv4_encap_size, e->h_dest, ttl,
1604                                       fl4.daddr,
1605                                       fl4.saddr, tun_key->tp_dst,
1606                                       tunnel_id_to_key32(tun_key->tun_id));
1607                 break;
1608         default:
1609                 err = -EOPNOTSUPP;
1610                 goto destroy_neigh_entry;
1611         }
1612         e->encap_size = ipv4_encap_size;
1613         e->encap_header = encap_header;
1614
1615         if (!(nud_state & NUD_VALID)) {
1616                 neigh_event_send(n, NULL);
1617                 err = -EAGAIN;
1618                 goto out;
1619         }
1620
1621         err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
1622                                ipv4_encap_size, encap_header, &e->encap_id);
1623         if (err)
1624                 goto destroy_neigh_entry;
1625
1626         e->flags |= MLX5_ENCAP_ENTRY_VALID;
1627         mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
1628         neigh_release(n);
1629         return err;
1630
1631 destroy_neigh_entry:
1632         mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
1633 out:
1634         kfree(encap_header);
1635         if (n)
1636                 neigh_release(n);
1637         return err;
1638 }
1639
1640 static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
1641                                           struct net_device *mirred_dev,
1642                                           struct mlx5e_encap_entry *e)
1643 {
1644         int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
1645         int ipv6_encap_size = ETH_HLEN + sizeof(struct ipv6hdr) + VXLAN_HLEN;
1646         struct ip_tunnel_key *tun_key = &e->tun_info.key;
1647         struct net_device *out_dev;
1648         struct neighbour *n = NULL;
1649         struct flowi6 fl6 = {};
1650         char *encap_header;
1651         int err, ttl = 0;
1652         u8 nud_state;
1653
1654         if (max_encap_size < ipv6_encap_size) {
1655                 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
1656                                ipv6_encap_size, max_encap_size);
1657                 return -EOPNOTSUPP;
1658         }
1659
1660         encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
1661         if (!encap_header)
1662                 return -ENOMEM;
1663
1664         switch (e->tunnel_type) {
1665         case MLX5_HEADER_TYPE_VXLAN:
1666                 fl6.flowi6_proto = IPPROTO_UDP;
1667                 fl6.fl6_dport = tun_key->tp_dst;
1668                 break;
1669         default:
1670                 err = -EOPNOTSUPP;
1671                 goto out;
1672         }
1673
1674         fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
1675         fl6.daddr = tun_key->u.ipv6.dst;
1676         fl6.saddr = tun_key->u.ipv6.src;
1677
1678         err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
1679                                       &fl6, &n, &ttl);
1680         if (err)
1681                 goto out;
1682
1683         /* used by mlx5e_detach_encap to lookup a neigh hash table
1684          * entry in the neigh hash table when a user deletes a rule
1685          */
1686         e->m_neigh.dev = n->dev;
1687         e->m_neigh.family = n->ops->family;
1688         memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
1689         e->out_dev = out_dev;
1690
1691         /* It's importent to add the neigh to the hash table before checking
1692          * the neigh validity state. So if we'll get a notification, in case the
1693          * neigh changes it's validity state, we would find the relevant neigh
1694          * in the hash.
1695          */
1696         err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
1697         if (err)
1698                 goto out;
1699
1700         read_lock_bh(&n->lock);
1701         nud_state = n->nud_state;
1702         ether_addr_copy(e->h_dest, n->ha);
1703         read_unlock_bh(&n->lock);
1704
1705         switch (e->tunnel_type) {
1706         case MLX5_HEADER_TYPE_VXLAN:
1707                 gen_vxlan_header_ipv6(out_dev, encap_header,
1708                                       ipv6_encap_size, e->h_dest, ttl,
1709                                       &fl6.daddr,
1710                                       &fl6.saddr, tun_key->tp_dst,
1711                                       tunnel_id_to_key32(tun_key->tun_id));
1712                 break;
1713         default:
1714                 err = -EOPNOTSUPP;
1715                 goto destroy_neigh_entry;
1716         }
1717
1718         e->encap_size = ipv6_encap_size;
1719         e->encap_header = encap_header;
1720
1721         if (!(nud_state & NUD_VALID)) {
1722                 neigh_event_send(n, NULL);
1723                 err = -EAGAIN;
1724                 goto out;
1725         }
1726
1727         err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
1728                                ipv6_encap_size, encap_header, &e->encap_id);
1729         if (err)
1730                 goto destroy_neigh_entry;
1731
1732         e->flags |= MLX5_ENCAP_ENTRY_VALID;
1733         mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
1734         neigh_release(n);
1735         return err;
1736
1737 destroy_neigh_entry:
1738         mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
1739 out:
1740         kfree(encap_header);
1741         if (n)
1742                 neigh_release(n);
1743         return err;
1744 }
1745
1746 static int mlx5e_attach_encap(struct mlx5e_priv *priv,
1747                               struct ip_tunnel_info *tun_info,
1748                               struct net_device *mirred_dev,
1749                               struct net_device **encap_dev,
1750                               struct mlx5e_tc_flow *flow)
1751 {
1752         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1753         struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
1754         unsigned short family = ip_tunnel_info_af(tun_info);
1755         struct mlx5e_priv *up_priv = netdev_priv(up_dev);
1756         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
1757         struct ip_tunnel_key *key = &tun_info->key;
1758         struct mlx5e_encap_entry *e;
1759         int tunnel_type, err = 0;
1760         uintptr_t hash_key;
1761         bool found = false;
1762
1763         /* udp dst port must be set */
1764         if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
1765                 goto vxlan_encap_offload_err;
1766
1767         /* setting udp src port isn't supported */
1768         if (memchr_inv(&key->tp_src, 0, sizeof(key->tp_src))) {
1769 vxlan_encap_offload_err:
1770                 netdev_warn(priv->netdev,
1771                             "must set udp dst port and not set udp src port\n");
1772                 return -EOPNOTSUPP;
1773         }
1774
1775         if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->tp_dst)) &&
1776             MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
1777                 tunnel_type = MLX5_HEADER_TYPE_VXLAN;
1778         } else {
1779                 netdev_warn(priv->netdev,
1780                             "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->tp_dst));
1781                 return -EOPNOTSUPP;
1782         }
1783
1784         hash_key = hash_encap_info(key);
1785
1786         hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
1787                                    encap_hlist, hash_key) {
1788                 if (!cmp_encap_info(&e->tun_info.key, key)) {
1789                         found = true;
1790                         break;
1791                 }
1792         }
1793
1794         if (found)
1795                 goto attach_flow;
1796
1797         e = kzalloc(sizeof(*e), GFP_KERNEL);
1798         if (!e)
1799                 return -ENOMEM;
1800
1801         e->tun_info = *tun_info;
1802         e->tunnel_type = tunnel_type;
1803         INIT_LIST_HEAD(&e->flows);
1804
1805         if (family == AF_INET)
1806                 err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e);
1807         else if (family == AF_INET6)
1808                 err = mlx5e_create_encap_header_ipv6(priv, mirred_dev, e);
1809
1810         if (err && err != -EAGAIN)
1811                 goto out_err;
1812
1813         hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
1814
1815 attach_flow:
1816         list_add(&flow->encap, &e->flows);
1817         *encap_dev = e->out_dev;
1818         if (e->flags & MLX5_ENCAP_ENTRY_VALID)
1819                 attr->encap_id = e->encap_id;
1820
1821         return err;
1822
1823 out_err:
1824         kfree(e);
1825         return err;
1826 }
1827
1828 static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
1829                                 struct mlx5e_tc_flow_parse_attr *parse_attr,
1830                                 struct mlx5e_tc_flow *flow)
1831 {
1832         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
1833         struct mlx5e_rep_priv *rpriv = priv->ppriv;
1834         struct ip_tunnel_info *info = NULL;
1835         const struct tc_action *a;
1836         LIST_HEAD(actions);
1837         bool encap = false;
1838         int err = 0;
1839
1840         if (!tcf_exts_has_actions(exts))
1841                 return -EINVAL;
1842
1843         memset(attr, 0, sizeof(*attr));
1844         attr->in_rep = rpriv->rep;
1845
1846         tcf_exts_to_list(exts, &actions);
1847         list_for_each_entry(a, &actions, list) {
1848                 if (is_tcf_gact_shot(a)) {
1849                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
1850                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1851                         continue;
1852                 }
1853
1854                 if (is_tcf_pedit(a)) {
1855                         err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_FDB,
1856                                                     parse_attr);
1857                         if (err)
1858                                 return err;
1859
1860                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
1861                         continue;
1862                 }
1863
1864                 if (is_tcf_csum(a)) {
1865                         if (csum_offload_supported(priv, attr->action,
1866                                                    tcf_csum_update_flags(a)))
1867                                 continue;
1868
1869                         return -EOPNOTSUPP;
1870                 }
1871
1872                 if (is_tcf_mirred_egress_redirect(a)) {
1873                         int ifindex = tcf_mirred_ifindex(a);
1874                         struct net_device *out_dev, *encap_dev = NULL;
1875                         struct mlx5e_priv *out_priv;
1876
1877                         out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);
1878
1879                         if (switchdev_port_same_parent_id(priv->netdev,
1880                                                           out_dev)) {
1881                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
1882                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1883                                 out_priv = netdev_priv(out_dev);
1884                                 rpriv = out_priv->ppriv;
1885                                 attr->out_rep = rpriv->rep;
1886                         } else if (encap) {
1887                                 err = mlx5e_attach_encap(priv, info,
1888                                                          out_dev, &encap_dev, flow);
1889                                 if (err && err != -EAGAIN)
1890                                         return err;
1891                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_ENCAP |
1892                                         MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
1893                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1894                                 out_priv = netdev_priv(encap_dev);
1895                                 rpriv = out_priv->ppriv;
1896                                 attr->out_rep = rpriv->rep;
1897                                 attr->parse_attr = parse_attr;
1898                         } else {
1899                                 pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
1900                                        priv->netdev->name, out_dev->name);
1901                                 return -EINVAL;
1902                         }
1903                         continue;
1904                 }
1905
1906                 if (is_tcf_tunnel_set(a)) {
1907                         info = tcf_tunnel_info(a);
1908                         if (info)
1909                                 encap = true;
1910                         else
1911                                 return -EOPNOTSUPP;
1912                         continue;
1913                 }
1914
1915                 if (is_tcf_vlan(a)) {
1916                         if (tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
1917                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
1918                         } else if (tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
1919                                 if (tcf_vlan_push_proto(a) != htons(ETH_P_8021Q))
1920                                         return -EOPNOTSUPP;
1921
1922                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
1923                                 attr->vlan = tcf_vlan_push_vid(a);
1924                         } else { /* action is TCA_VLAN_ACT_MODIFY */
1925                                 return -EOPNOTSUPP;
1926                         }
1927                         continue;
1928                 }
1929
1930                 if (is_tcf_tunnel_release(a)) {
1931                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
1932                         continue;
1933                 }
1934
1935                 return -EINVAL;
1936         }
1937         return err;
1938 }
1939
1940 int mlx5e_configure_flower(struct mlx5e_priv *priv,
1941                            struct tc_cls_flower_offload *f)
1942 {
1943         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1944         struct mlx5e_tc_flow_parse_attr *parse_attr;
1945         struct mlx5e_tc_table *tc = &priv->fs.tc;
1946         struct mlx5e_tc_flow *flow;
1947         int attr_size, err = 0;
1948         u8 flow_flags = 0;
1949
1950         if (esw && esw->mode == SRIOV_OFFLOADS) {
1951                 flow_flags = MLX5E_TC_FLOW_ESWITCH;
1952                 attr_size  = sizeof(struct mlx5_esw_flow_attr);
1953         } else {
1954                 flow_flags = MLX5E_TC_FLOW_NIC;
1955                 attr_size  = sizeof(struct mlx5_nic_flow_attr);
1956         }
1957
1958         flow = kzalloc(sizeof(*flow) + attr_size, GFP_KERNEL);
1959         parse_attr = kvzalloc(sizeof(*parse_attr), GFP_KERNEL);
1960         if (!parse_attr || !flow) {
1961                 err = -ENOMEM;
1962                 goto err_free;
1963         }
1964
1965         flow->cookie = f->cookie;
1966         flow->flags = flow_flags;
1967
1968         err = parse_cls_flower(priv, flow, &parse_attr->spec, f);
1969         if (err < 0)
1970                 goto err_free;
1971
1972         if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
1973                 err = parse_tc_fdb_actions(priv, f->exts, parse_attr, flow);
1974                 if (err < 0)
1975                         goto err_handle_encap_flow;
1976                 flow->rule = mlx5e_tc_add_fdb_flow(priv, parse_attr, flow);
1977         } else {
1978                 err = parse_tc_nic_actions(priv, f->exts, parse_attr, flow);
1979                 if (err < 0)
1980                         goto err_free;
1981                 flow->rule = mlx5e_tc_add_nic_flow(priv, parse_attr, flow);
1982         }
1983
1984         if (IS_ERR(flow->rule)) {
1985                 err = PTR_ERR(flow->rule);
1986                 goto err_free;
1987         }
1988
1989         flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
1990         err = rhashtable_insert_fast(&tc->ht, &flow->node,
1991                                      tc->ht_params);
1992         if (err)
1993                 goto err_del_rule;
1994
1995         if (flow->flags & MLX5E_TC_FLOW_ESWITCH &&
1996             !(flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP))
1997                 kvfree(parse_attr);
1998         return err;
1999
2000 err_del_rule:
2001         mlx5e_tc_del_flow(priv, flow);
2002
2003 err_handle_encap_flow:
2004         if (err == -EAGAIN) {
2005                 err = rhashtable_insert_fast(&tc->ht, &flow->node,
2006                                              tc->ht_params);
2007                 if (err)
2008                         mlx5e_tc_del_flow(priv, flow);
2009                 else
2010                         return 0;
2011         }
2012
2013 err_free:
2014         kvfree(parse_attr);
2015         kfree(flow);
2016         return err;
2017 }
2018
2019 int mlx5e_delete_flower(struct mlx5e_priv *priv,
2020                         struct tc_cls_flower_offload *f)
2021 {
2022         struct mlx5e_tc_flow *flow;
2023         struct mlx5e_tc_table *tc = &priv->fs.tc;
2024
2025         flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
2026                                       tc->ht_params);
2027         if (!flow)
2028                 return -EINVAL;
2029
2030         rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
2031
2032         mlx5e_tc_del_flow(priv, flow);
2033
2034         kfree(flow);
2035
2036         return 0;
2037 }
2038
2039 int mlx5e_stats_flower(struct mlx5e_priv *priv,
2040                        struct tc_cls_flower_offload *f)
2041 {
2042         struct mlx5e_tc_table *tc = &priv->fs.tc;
2043         struct mlx5e_tc_flow *flow;
2044         struct mlx5_fc *counter;
2045         u64 bytes;
2046         u64 packets;
2047         u64 lastuse;
2048
2049         flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
2050                                       tc->ht_params);
2051         if (!flow)
2052                 return -EINVAL;
2053
2054         if (!(flow->flags & MLX5E_TC_FLOW_OFFLOADED))
2055                 return 0;
2056
2057         counter = mlx5_flow_rule_counter(flow->rule);
2058         if (!counter)
2059                 return 0;
2060
2061         mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
2062
2063         tcf_exts_stats_update(f->exts, bytes, packets, lastuse);
2064
2065         return 0;
2066 }
2067
2068 static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
2069         .head_offset = offsetof(struct mlx5e_tc_flow, node),
2070         .key_offset = offsetof(struct mlx5e_tc_flow, cookie),
2071         .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
2072         .automatic_shrinking = true,
2073 };
2074
2075 int mlx5e_tc_init(struct mlx5e_priv *priv)
2076 {
2077         struct mlx5e_tc_table *tc = &priv->fs.tc;
2078
2079         hash_init(tc->mod_hdr_tbl);
2080
2081         tc->ht_params = mlx5e_tc_flow_ht_params;
2082         return rhashtable_init(&tc->ht, &tc->ht_params);
2083 }
2084
2085 static void _mlx5e_tc_del_flow(void *ptr, void *arg)
2086 {
2087         struct mlx5e_tc_flow *flow = ptr;
2088         struct mlx5e_priv *priv = arg;
2089
2090         mlx5e_tc_del_flow(priv, flow);
2091         kfree(flow);
2092 }
2093
2094 void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
2095 {
2096         struct mlx5e_tc_table *tc = &priv->fs.tc;
2097
2098         rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
2099
2100         if (!IS_ERR_OR_NULL(tc->t)) {
2101                 mlx5_destroy_flow_table(tc->t);
2102                 tc->t = NULL;
2103         }
2104 }