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 static struct mlx5_fields fields[] = {
1062         {MLX5_ACTION_IN_FIELD_OUT_DMAC_47_16, 4, offsetof(struct pedit_headers, eth.h_dest[0])},
1063         {MLX5_ACTION_IN_FIELD_OUT_DMAC_15_0,  2, offsetof(struct pedit_headers, eth.h_dest[4])},
1064         {MLX5_ACTION_IN_FIELD_OUT_SMAC_47_16, 4, offsetof(struct pedit_headers, eth.h_source[0])},
1065         {MLX5_ACTION_IN_FIELD_OUT_SMAC_15_0,  2, offsetof(struct pedit_headers, eth.h_source[4])},
1066         {MLX5_ACTION_IN_FIELD_OUT_ETHERTYPE,  2, offsetof(struct pedit_headers, eth.h_proto)},
1067
1068         {MLX5_ACTION_IN_FIELD_OUT_IP_TTL,  1, offsetof(struct pedit_headers, ip4.ttl)},
1069         {MLX5_ACTION_IN_FIELD_OUT_SIPV4,   4, offsetof(struct pedit_headers, ip4.saddr)},
1070         {MLX5_ACTION_IN_FIELD_OUT_DIPV4,   4, offsetof(struct pedit_headers, ip4.daddr)},
1071
1072         {MLX5_ACTION_IN_FIELD_OUT_SIPV6_127_96, 4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[0])},
1073         {MLX5_ACTION_IN_FIELD_OUT_SIPV6_95_64,  4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[1])},
1074         {MLX5_ACTION_IN_FIELD_OUT_SIPV6_63_32,  4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[2])},
1075         {MLX5_ACTION_IN_FIELD_OUT_SIPV6_31_0,   4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[3])},
1076         {MLX5_ACTION_IN_FIELD_OUT_DIPV6_127_96, 4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[0])},
1077         {MLX5_ACTION_IN_FIELD_OUT_DIPV6_95_64,  4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[1])},
1078         {MLX5_ACTION_IN_FIELD_OUT_DIPV6_63_32,  4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[2])},
1079         {MLX5_ACTION_IN_FIELD_OUT_DIPV6_31_0,   4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[3])},
1080
1081         {MLX5_ACTION_IN_FIELD_OUT_TCP_SPORT, 2, offsetof(struct pedit_headers, tcp.source)},
1082         {MLX5_ACTION_IN_FIELD_OUT_TCP_DPORT, 2, offsetof(struct pedit_headers, tcp.dest)},
1083         {MLX5_ACTION_IN_FIELD_OUT_TCP_FLAGS, 1, offsetof(struct pedit_headers, tcp.ack_seq) + 5},
1084
1085         {MLX5_ACTION_IN_FIELD_OUT_UDP_SPORT, 2, offsetof(struct pedit_headers, udp.source)},
1086         {MLX5_ACTION_IN_FIELD_OUT_UDP_DPORT, 2, offsetof(struct pedit_headers, udp.dest)},
1087 };
1088
1089 /* On input attr->num_mod_hdr_actions tells how many HW actions can be parsed at
1090  * max from the SW pedit action. On success, it says how many HW actions were
1091  * actually parsed.
1092  */
1093 static int offload_pedit_fields(struct pedit_headers *masks,
1094                                 struct pedit_headers *vals,
1095                                 struct mlx5e_tc_flow_parse_attr *parse_attr)
1096 {
1097         struct pedit_headers *set_masks, *add_masks, *set_vals, *add_vals;
1098         int i, action_size, nactions, max_actions, first, last, next_z;
1099         void *s_masks_p, *a_masks_p, *vals_p;
1100         struct mlx5_fields *f;
1101         u8 cmd, field_bsize;
1102         u32 s_mask, a_mask;
1103         unsigned long mask;
1104         __be32 mask_be32;
1105         __be16 mask_be16;
1106         void *action;
1107
1108         set_masks = &masks[TCA_PEDIT_KEY_EX_CMD_SET];
1109         add_masks = &masks[TCA_PEDIT_KEY_EX_CMD_ADD];
1110         set_vals = &vals[TCA_PEDIT_KEY_EX_CMD_SET];
1111         add_vals = &vals[TCA_PEDIT_KEY_EX_CMD_ADD];
1112
1113         action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
1114         action = parse_attr->mod_hdr_actions;
1115         max_actions = parse_attr->num_mod_hdr_actions;
1116         nactions = 0;
1117
1118         for (i = 0; i < ARRAY_SIZE(fields); i++) {
1119                 f = &fields[i];
1120                 /* avoid seeing bits set from previous iterations */
1121                 s_mask = 0;
1122                 a_mask = 0;
1123
1124                 s_masks_p = (void *)set_masks + f->offset;
1125                 a_masks_p = (void *)add_masks + f->offset;
1126
1127                 memcpy(&s_mask, s_masks_p, f->size);
1128                 memcpy(&a_mask, a_masks_p, f->size);
1129
1130                 if (!s_mask && !a_mask) /* nothing to offload here */
1131                         continue;
1132
1133                 if (s_mask && a_mask) {
1134                         printk(KERN_WARNING "mlx5: can't set and add to the same HW field (%x)\n", f->field);
1135                         return -EOPNOTSUPP;
1136                 }
1137
1138                 if (nactions == max_actions) {
1139                         printk(KERN_WARNING "mlx5: parsed %d pedit actions, can't do more\n", nactions);
1140                         return -EOPNOTSUPP;
1141                 }
1142
1143                 if (s_mask) {
1144                         cmd  = MLX5_ACTION_TYPE_SET;
1145                         mask = s_mask;
1146                         vals_p = (void *)set_vals + f->offset;
1147                         /* clear to denote we consumed this field */
1148                         memset(s_masks_p, 0, f->size);
1149                 } else {
1150                         cmd  = MLX5_ACTION_TYPE_ADD;
1151                         mask = a_mask;
1152                         vals_p = (void *)add_vals + f->offset;
1153                         /* clear to denote we consumed this field */
1154                         memset(a_masks_p, 0, f->size);
1155                 }
1156
1157                 field_bsize = f->size * BITS_PER_BYTE;
1158
1159                 if (field_bsize == 32) {
1160                         mask_be32 = *(__be32 *)&mask;
1161                         mask = (__force unsigned long)cpu_to_le32(be32_to_cpu(mask_be32));
1162                 } else if (field_bsize == 16) {
1163                         mask_be16 = *(__be16 *)&mask;
1164                         mask = (__force unsigned long)cpu_to_le16(be16_to_cpu(mask_be16));
1165                 }
1166
1167                 first = find_first_bit(&mask, field_bsize);
1168                 next_z = find_next_zero_bit(&mask, field_bsize, first);
1169                 last  = find_last_bit(&mask, field_bsize);
1170                 if (first < next_z && next_z < last) {
1171                         printk(KERN_WARNING "mlx5: rewrite of few sub-fields (mask %lx) isn't offloaded\n",
1172                                mask);
1173                         return -EOPNOTSUPP;
1174                 }
1175
1176                 MLX5_SET(set_action_in, action, action_type, cmd);
1177                 MLX5_SET(set_action_in, action, field, f->field);
1178
1179                 if (cmd == MLX5_ACTION_TYPE_SET) {
1180                         MLX5_SET(set_action_in, action, offset, first);
1181                         /* length is num of bits to be written, zero means length of 32 */
1182                         MLX5_SET(set_action_in, action, length, (last - first + 1));
1183                 }
1184
1185                 if (field_bsize == 32)
1186                         MLX5_SET(set_action_in, action, data, ntohl(*(__be32 *)vals_p) >> first);
1187                 else if (field_bsize == 16)
1188                         MLX5_SET(set_action_in, action, data, ntohs(*(__be16 *)vals_p) >> first);
1189                 else if (field_bsize == 8)
1190                         MLX5_SET(set_action_in, action, data, *(u8 *)vals_p >> first);
1191
1192                 action += action_size;
1193                 nactions++;
1194         }
1195
1196         parse_attr->num_mod_hdr_actions = nactions;
1197         return 0;
1198 }
1199
1200 static int alloc_mod_hdr_actions(struct mlx5e_priv *priv,
1201                                  const struct tc_action *a, int namespace,
1202                                  struct mlx5e_tc_flow_parse_attr *parse_attr)
1203 {
1204         int nkeys, action_size, max_actions;
1205
1206         nkeys = tcf_pedit_nkeys(a);
1207         action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
1208
1209         if (namespace == MLX5_FLOW_NAMESPACE_FDB) /* FDB offloading */
1210                 max_actions = MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, max_modify_header_actions);
1211         else /* namespace is MLX5_FLOW_NAMESPACE_KERNEL - NIC offloading */
1212                 max_actions = MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, max_modify_header_actions);
1213
1214         /* can get up to crazingly 16 HW actions in 32 bits pedit SW key */
1215         max_actions = min(max_actions, nkeys * 16);
1216
1217         parse_attr->mod_hdr_actions = kcalloc(max_actions, action_size, GFP_KERNEL);
1218         if (!parse_attr->mod_hdr_actions)
1219                 return -ENOMEM;
1220
1221         parse_attr->num_mod_hdr_actions = max_actions;
1222         return 0;
1223 }
1224
1225 static const struct pedit_headers zero_masks = {};
1226
1227 static int parse_tc_pedit_action(struct mlx5e_priv *priv,
1228                                  const struct tc_action *a, int namespace,
1229                                  struct mlx5e_tc_flow_parse_attr *parse_attr)
1230 {
1231         struct pedit_headers masks[__PEDIT_CMD_MAX], vals[__PEDIT_CMD_MAX], *cmd_masks;
1232         int nkeys, i, err = -EOPNOTSUPP;
1233         u32 mask, val, offset;
1234         u8 cmd, htype;
1235
1236         nkeys = tcf_pedit_nkeys(a);
1237
1238         memset(masks, 0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
1239         memset(vals,  0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
1240
1241         for (i = 0; i < nkeys; i++) {
1242                 htype = tcf_pedit_htype(a, i);
1243                 cmd = tcf_pedit_cmd(a, i);
1244                 err = -EOPNOTSUPP; /* can't be all optimistic */
1245
1246                 if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK) {
1247                         printk(KERN_WARNING "mlx5: legacy pedit isn't offloaded\n");
1248                         goto out_err;
1249                 }
1250
1251                 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET && cmd != TCA_PEDIT_KEY_EX_CMD_ADD) {
1252                         printk(KERN_WARNING "mlx5: pedit cmd %d isn't offloaded\n", cmd);
1253                         goto out_err;
1254                 }
1255
1256                 mask = tcf_pedit_mask(a, i);
1257                 val = tcf_pedit_val(a, i);
1258                 offset = tcf_pedit_offset(a, i);
1259
1260                 err = set_pedit_val(htype, ~mask, val, offset, &masks[cmd], &vals[cmd]);
1261                 if (err)
1262                         goto out_err;
1263         }
1264
1265         err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr);
1266         if (err)
1267                 goto out_err;
1268
1269         err = offload_pedit_fields(masks, vals, parse_attr);
1270         if (err < 0)
1271                 goto out_dealloc_parsed_actions;
1272
1273         for (cmd = 0; cmd < __PEDIT_CMD_MAX; cmd++) {
1274                 cmd_masks = &masks[cmd];
1275                 if (memcmp(cmd_masks, &zero_masks, sizeof(zero_masks))) {
1276                         printk(KERN_WARNING "mlx5: attempt to offload an unsupported field (cmd %d)\n",
1277                                cmd);
1278                         print_hex_dump(KERN_WARNING, "mask: ", DUMP_PREFIX_ADDRESS,
1279                                        16, 1, cmd_masks, sizeof(zero_masks), true);
1280                         err = -EOPNOTSUPP;
1281                         goto out_dealloc_parsed_actions;
1282                 }
1283         }
1284
1285         return 0;
1286
1287 out_dealloc_parsed_actions:
1288         kfree(parse_attr->mod_hdr_actions);
1289 out_err:
1290         return err;
1291 }
1292
1293 static bool csum_offload_supported(struct mlx5e_priv *priv, u32 action, u32 update_flags)
1294 {
1295         u32 prot_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR | TCA_CSUM_UPDATE_FLAG_TCP |
1296                          TCA_CSUM_UPDATE_FLAG_UDP;
1297
1298         /*  The HW recalcs checksums only if re-writing headers */
1299         if (!(action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)) {
1300                 netdev_warn(priv->netdev,
1301                             "TC csum action is only offloaded with pedit\n");
1302                 return false;
1303         }
1304
1305         if (update_flags & ~prot_flags) {
1306                 netdev_warn(priv->netdev,
1307                             "can't offload TC csum action for some header/s - flags %#x\n",
1308                             update_flags);
1309                 return false;
1310         }
1311
1312         return true;
1313 }
1314
1315 static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
1316                                 struct mlx5e_tc_flow_parse_attr *parse_attr,
1317                                 struct mlx5e_tc_flow *flow)
1318 {
1319         struct mlx5_nic_flow_attr *attr = flow->nic_attr;
1320         const struct tc_action *a;
1321         LIST_HEAD(actions);
1322         int err;
1323
1324         if (tc_no_actions(exts))
1325                 return -EINVAL;
1326
1327         attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
1328         attr->action = 0;
1329
1330         tcf_exts_to_list(exts, &actions);
1331         list_for_each_entry(a, &actions, list) {
1332                 if (is_tcf_gact_shot(a)) {
1333                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
1334                         if (MLX5_CAP_FLOWTABLE(priv->mdev,
1335                                                flow_table_properties_nic_receive.flow_counter))
1336                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
1337                         continue;
1338                 }
1339
1340                 if (is_tcf_pedit(a)) {
1341                         err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_KERNEL,
1342                                                     parse_attr);
1343                         if (err)
1344                                 return err;
1345
1346                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
1347                                         MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
1348                         continue;
1349                 }
1350
1351                 if (is_tcf_csum(a)) {
1352                         if (csum_offload_supported(priv, attr->action,
1353                                                    tcf_csum_update_flags(a)))
1354                                 continue;
1355
1356                         return -EOPNOTSUPP;
1357                 }
1358
1359                 if (is_tcf_skbedit_mark(a)) {
1360                         u32 mark = tcf_skbedit_mark(a);
1361
1362                         if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
1363                                 netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
1364                                             mark);
1365                                 return -EINVAL;
1366                         }
1367
1368                         attr->flow_tag = mark;
1369                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
1370                         continue;
1371                 }
1372
1373                 return -EINVAL;
1374         }
1375
1376         return 0;
1377 }
1378
1379 static inline int cmp_encap_info(struct ip_tunnel_key *a,
1380                                  struct ip_tunnel_key *b)
1381 {
1382         return memcmp(a, b, sizeof(*a));
1383 }
1384
1385 static inline int hash_encap_info(struct ip_tunnel_key *key)
1386 {
1387         return jhash(key, sizeof(*key), 0);
1388 }
1389
1390 static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
1391                                    struct net_device *mirred_dev,
1392                                    struct net_device **out_dev,
1393                                    struct flowi4 *fl4,
1394                                    struct neighbour **out_n,
1395                                    int *out_ttl)
1396 {
1397         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1398         struct rtable *rt;
1399         struct neighbour *n = NULL;
1400
1401 #if IS_ENABLED(CONFIG_INET)
1402         int ret;
1403
1404         rt = ip_route_output_key(dev_net(mirred_dev), fl4);
1405         ret = PTR_ERR_OR_ZERO(rt);
1406         if (ret)
1407                 return ret;
1408 #else
1409         return -EOPNOTSUPP;
1410 #endif
1411         /* if the egress device isn't on the same HW e-switch, we use the uplink */
1412         if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
1413                 *out_dev = mlx5_eswitch_get_uplink_netdev(esw);
1414         else
1415                 *out_dev = rt->dst.dev;
1416
1417         *out_ttl = ip4_dst_hoplimit(&rt->dst);
1418         n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
1419         ip_rt_put(rt);
1420         if (!n)
1421                 return -ENOMEM;
1422
1423         *out_n = n;
1424         return 0;
1425 }
1426
1427 static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
1428                                    struct net_device *mirred_dev,
1429                                    struct net_device **out_dev,
1430                                    struct flowi6 *fl6,
1431                                    struct neighbour **out_n,
1432                                    int *out_ttl)
1433 {
1434         struct neighbour *n = NULL;
1435         struct dst_entry *dst;
1436
1437 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
1438         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1439         int ret;
1440
1441         dst = ip6_route_output(dev_net(mirred_dev), NULL, fl6);
1442         ret = dst->error;
1443         if (ret) {
1444                 dst_release(dst);
1445                 return ret;
1446         }
1447
1448         *out_ttl = ip6_dst_hoplimit(dst);
1449
1450         /* if the egress device isn't on the same HW e-switch, we use the uplink */
1451         if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
1452                 *out_dev = mlx5_eswitch_get_uplink_netdev(esw);
1453         else
1454                 *out_dev = dst->dev;
1455 #else
1456         return -EOPNOTSUPP;
1457 #endif
1458
1459         n = dst_neigh_lookup(dst, &fl6->daddr);
1460         dst_release(dst);
1461         if (!n)
1462                 return -ENOMEM;
1463
1464         *out_n = n;
1465         return 0;
1466 }
1467
1468 static void gen_vxlan_header_ipv4(struct net_device *out_dev,
1469                                   char buf[], int encap_size,
1470                                   unsigned char h_dest[ETH_ALEN],
1471                                   int ttl,
1472                                   __be32 daddr,
1473                                   __be32 saddr,
1474                                   __be16 udp_dst_port,
1475                                   __be32 vx_vni)
1476 {
1477         struct ethhdr *eth = (struct ethhdr *)buf;
1478         struct iphdr  *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
1479         struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
1480         struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
1481
1482         memset(buf, 0, encap_size);
1483
1484         ether_addr_copy(eth->h_dest, h_dest);
1485         ether_addr_copy(eth->h_source, out_dev->dev_addr);
1486         eth->h_proto = htons(ETH_P_IP);
1487
1488         ip->daddr = daddr;
1489         ip->saddr = saddr;
1490
1491         ip->ttl = ttl;
1492         ip->protocol = IPPROTO_UDP;
1493         ip->version = 0x4;
1494         ip->ihl = 0x5;
1495
1496         udp->dest = udp_dst_port;
1497         vxh->vx_flags = VXLAN_HF_VNI;
1498         vxh->vx_vni = vxlan_vni_field(vx_vni);
1499 }
1500
1501 static void gen_vxlan_header_ipv6(struct net_device *out_dev,
1502                                   char buf[], int encap_size,
1503                                   unsigned char h_dest[ETH_ALEN],
1504                                   int ttl,
1505                                   struct in6_addr *daddr,
1506                                   struct in6_addr *saddr,
1507                                   __be16 udp_dst_port,
1508                                   __be32 vx_vni)
1509 {
1510         struct ethhdr *eth = (struct ethhdr *)buf;
1511         struct ipv6hdr *ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
1512         struct udphdr *udp = (struct udphdr *)((char *)ip6h + sizeof(struct ipv6hdr));
1513         struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
1514
1515         memset(buf, 0, encap_size);
1516
1517         ether_addr_copy(eth->h_dest, h_dest);
1518         ether_addr_copy(eth->h_source, out_dev->dev_addr);
1519         eth->h_proto = htons(ETH_P_IPV6);
1520
1521         ip6_flow_hdr(ip6h, 0, 0);
1522         /* the HW fills up ipv6 payload len */
1523         ip6h->nexthdr     = IPPROTO_UDP;
1524         ip6h->hop_limit   = ttl;
1525         ip6h->daddr       = *daddr;
1526         ip6h->saddr       = *saddr;
1527
1528         udp->dest = udp_dst_port;
1529         vxh->vx_flags = VXLAN_HF_VNI;
1530         vxh->vx_vni = vxlan_vni_field(vx_vni);
1531 }
1532
1533 static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
1534                                           struct net_device *mirred_dev,
1535                                           struct mlx5e_encap_entry *e)
1536 {
1537         int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
1538         int ipv4_encap_size = ETH_HLEN + sizeof(struct iphdr) + VXLAN_HLEN;
1539         struct ip_tunnel_key *tun_key = &e->tun_info.key;
1540         struct net_device *out_dev;
1541         struct neighbour *n = NULL;
1542         struct flowi4 fl4 = {};
1543         char *encap_header;
1544         int ttl, err;
1545         u8 nud_state;
1546
1547         if (max_encap_size < ipv4_encap_size) {
1548                 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
1549                                ipv4_encap_size, max_encap_size);
1550                 return -EOPNOTSUPP;
1551         }
1552
1553         encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
1554         if (!encap_header)
1555                 return -ENOMEM;
1556
1557         switch (e->tunnel_type) {
1558         case MLX5_HEADER_TYPE_VXLAN:
1559                 fl4.flowi4_proto = IPPROTO_UDP;
1560                 fl4.fl4_dport = tun_key->tp_dst;
1561                 break;
1562         default:
1563                 err = -EOPNOTSUPP;
1564                 goto out;
1565         }
1566         fl4.flowi4_tos = tun_key->tos;
1567         fl4.daddr = tun_key->u.ipv4.dst;
1568         fl4.saddr = tun_key->u.ipv4.src;
1569
1570         err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
1571                                       &fl4, &n, &ttl);
1572         if (err)
1573                 goto out;
1574
1575         /* used by mlx5e_detach_encap to lookup a neigh hash table
1576          * entry in the neigh hash table when a user deletes a rule
1577          */
1578         e->m_neigh.dev = n->dev;
1579         e->m_neigh.family = n->ops->family;
1580         memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
1581         e->out_dev = out_dev;
1582
1583         /* It's importent to add the neigh to the hash table before checking
1584          * the neigh validity state. So if we'll get a notification, in case the
1585          * neigh changes it's validity state, we would find the relevant neigh
1586          * in the hash.
1587          */
1588         err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
1589         if (err)
1590                 goto out;
1591
1592         read_lock_bh(&n->lock);
1593         nud_state = n->nud_state;
1594         ether_addr_copy(e->h_dest, n->ha);
1595         read_unlock_bh(&n->lock);
1596
1597         switch (e->tunnel_type) {
1598         case MLX5_HEADER_TYPE_VXLAN:
1599                 gen_vxlan_header_ipv4(out_dev, encap_header,
1600                                       ipv4_encap_size, e->h_dest, ttl,
1601                                       fl4.daddr,
1602                                       fl4.saddr, tun_key->tp_dst,
1603                                       tunnel_id_to_key32(tun_key->tun_id));
1604                 break;
1605         default:
1606                 err = -EOPNOTSUPP;
1607                 goto destroy_neigh_entry;
1608         }
1609         e->encap_size = ipv4_encap_size;
1610         e->encap_header = encap_header;
1611
1612         if (!(nud_state & NUD_VALID)) {
1613                 neigh_event_send(n, NULL);
1614                 err = -EAGAIN;
1615                 goto out;
1616         }
1617
1618         err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
1619                                ipv4_encap_size, encap_header, &e->encap_id);
1620         if (err)
1621                 goto destroy_neigh_entry;
1622
1623         e->flags |= MLX5_ENCAP_ENTRY_VALID;
1624         mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
1625         neigh_release(n);
1626         return err;
1627
1628 destroy_neigh_entry:
1629         mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
1630 out:
1631         kfree(encap_header);
1632         if (n)
1633                 neigh_release(n);
1634         return err;
1635 }
1636
1637 static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
1638                                           struct net_device *mirred_dev,
1639                                           struct mlx5e_encap_entry *e)
1640 {
1641         int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
1642         int ipv6_encap_size = ETH_HLEN + sizeof(struct ipv6hdr) + VXLAN_HLEN;
1643         struct ip_tunnel_key *tun_key = &e->tun_info.key;
1644         struct net_device *out_dev;
1645         struct neighbour *n = NULL;
1646         struct flowi6 fl6 = {};
1647         char *encap_header;
1648         int err, ttl = 0;
1649         u8 nud_state;
1650
1651         if (max_encap_size < ipv6_encap_size) {
1652                 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
1653                                ipv6_encap_size, max_encap_size);
1654                 return -EOPNOTSUPP;
1655         }
1656
1657         encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
1658         if (!encap_header)
1659                 return -ENOMEM;
1660
1661         switch (e->tunnel_type) {
1662         case MLX5_HEADER_TYPE_VXLAN:
1663                 fl6.flowi6_proto = IPPROTO_UDP;
1664                 fl6.fl6_dport = tun_key->tp_dst;
1665                 break;
1666         default:
1667                 err = -EOPNOTSUPP;
1668                 goto out;
1669         }
1670
1671         fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
1672         fl6.daddr = tun_key->u.ipv6.dst;
1673         fl6.saddr = tun_key->u.ipv6.src;
1674
1675         err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
1676                                       &fl6, &n, &ttl);
1677         if (err)
1678                 goto out;
1679
1680         /* used by mlx5e_detach_encap to lookup a neigh hash table
1681          * entry in the neigh hash table when a user deletes a rule
1682          */
1683         e->m_neigh.dev = n->dev;
1684         e->m_neigh.family = n->ops->family;
1685         memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
1686         e->out_dev = out_dev;
1687
1688         /* It's importent to add the neigh to the hash table before checking
1689          * the neigh validity state. So if we'll get a notification, in case the
1690          * neigh changes it's validity state, we would find the relevant neigh
1691          * in the hash.
1692          */
1693         err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
1694         if (err)
1695                 goto out;
1696
1697         read_lock_bh(&n->lock);
1698         nud_state = n->nud_state;
1699         ether_addr_copy(e->h_dest, n->ha);
1700         read_unlock_bh(&n->lock);
1701
1702         switch (e->tunnel_type) {
1703         case MLX5_HEADER_TYPE_VXLAN:
1704                 gen_vxlan_header_ipv6(out_dev, encap_header,
1705                                       ipv6_encap_size, e->h_dest, ttl,
1706                                       &fl6.daddr,
1707                                       &fl6.saddr, tun_key->tp_dst,
1708                                       tunnel_id_to_key32(tun_key->tun_id));
1709                 break;
1710         default:
1711                 err = -EOPNOTSUPP;
1712                 goto destroy_neigh_entry;
1713         }
1714
1715         e->encap_size = ipv6_encap_size;
1716         e->encap_header = encap_header;
1717
1718         if (!(nud_state & NUD_VALID)) {
1719                 neigh_event_send(n, NULL);
1720                 err = -EAGAIN;
1721                 goto out;
1722         }
1723
1724         err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
1725                                ipv6_encap_size, encap_header, &e->encap_id);
1726         if (err)
1727                 goto destroy_neigh_entry;
1728
1729         e->flags |= MLX5_ENCAP_ENTRY_VALID;
1730         mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
1731         neigh_release(n);
1732         return err;
1733
1734 destroy_neigh_entry:
1735         mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
1736 out:
1737         kfree(encap_header);
1738         if (n)
1739                 neigh_release(n);
1740         return err;
1741 }
1742
1743 static int mlx5e_attach_encap(struct mlx5e_priv *priv,
1744                               struct ip_tunnel_info *tun_info,
1745                               struct net_device *mirred_dev,
1746                               struct net_device **encap_dev,
1747                               struct mlx5e_tc_flow *flow)
1748 {
1749         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1750         struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
1751         unsigned short family = ip_tunnel_info_af(tun_info);
1752         struct mlx5e_priv *up_priv = netdev_priv(up_dev);
1753         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
1754         struct ip_tunnel_key *key = &tun_info->key;
1755         struct mlx5e_encap_entry *e;
1756         int tunnel_type, err = 0;
1757         uintptr_t hash_key;
1758         bool found = false;
1759
1760         /* udp dst port must be set */
1761         if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
1762                 goto vxlan_encap_offload_err;
1763
1764         /* setting udp src port isn't supported */
1765         if (memchr_inv(&key->tp_src, 0, sizeof(key->tp_src))) {
1766 vxlan_encap_offload_err:
1767                 netdev_warn(priv->netdev,
1768                             "must set udp dst port and not set udp src port\n");
1769                 return -EOPNOTSUPP;
1770         }
1771
1772         if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->tp_dst)) &&
1773             MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
1774                 tunnel_type = MLX5_HEADER_TYPE_VXLAN;
1775         } else {
1776                 netdev_warn(priv->netdev,
1777                             "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->tp_dst));
1778                 return -EOPNOTSUPP;
1779         }
1780
1781         hash_key = hash_encap_info(key);
1782
1783         hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
1784                                    encap_hlist, hash_key) {
1785                 if (!cmp_encap_info(&e->tun_info.key, key)) {
1786                         found = true;
1787                         break;
1788                 }
1789         }
1790
1791         if (found)
1792                 goto attach_flow;
1793
1794         e = kzalloc(sizeof(*e), GFP_KERNEL);
1795         if (!e)
1796                 return -ENOMEM;
1797
1798         e->tun_info = *tun_info;
1799         e->tunnel_type = tunnel_type;
1800         INIT_LIST_HEAD(&e->flows);
1801
1802         if (family == AF_INET)
1803                 err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e);
1804         else if (family == AF_INET6)
1805                 err = mlx5e_create_encap_header_ipv6(priv, mirred_dev, e);
1806
1807         if (err && err != -EAGAIN)
1808                 goto out_err;
1809
1810         hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
1811
1812 attach_flow:
1813         list_add(&flow->encap, &e->flows);
1814         *encap_dev = e->out_dev;
1815         if (e->flags & MLX5_ENCAP_ENTRY_VALID)
1816                 attr->encap_id = e->encap_id;
1817
1818         return err;
1819
1820 out_err:
1821         kfree(e);
1822         return err;
1823 }
1824
1825 static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
1826                                 struct mlx5e_tc_flow_parse_attr *parse_attr,
1827                                 struct mlx5e_tc_flow *flow)
1828 {
1829         struct mlx5_esw_flow_attr *attr = flow->esw_attr;
1830         struct mlx5e_rep_priv *rpriv = priv->ppriv;
1831         struct ip_tunnel_info *info = NULL;
1832         const struct tc_action *a;
1833         LIST_HEAD(actions);
1834         bool encap = false;
1835         int err = 0;
1836
1837         if (tc_no_actions(exts))
1838                 return -EINVAL;
1839
1840         memset(attr, 0, sizeof(*attr));
1841         attr->in_rep = rpriv->rep;
1842
1843         tcf_exts_to_list(exts, &actions);
1844         list_for_each_entry(a, &actions, list) {
1845                 if (is_tcf_gact_shot(a)) {
1846                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
1847                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1848                         continue;
1849                 }
1850
1851                 if (is_tcf_pedit(a)) {
1852                         err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_FDB,
1853                                                     parse_attr);
1854                         if (err)
1855                                 return err;
1856
1857                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
1858                         continue;
1859                 }
1860
1861                 if (is_tcf_csum(a)) {
1862                         if (csum_offload_supported(priv, attr->action,
1863                                                    tcf_csum_update_flags(a)))
1864                                 continue;
1865
1866                         return -EOPNOTSUPP;
1867                 }
1868
1869                 if (is_tcf_mirred_egress_redirect(a)) {
1870                         int ifindex = tcf_mirred_ifindex(a);
1871                         struct net_device *out_dev, *encap_dev = NULL;
1872                         struct mlx5e_priv *out_priv;
1873
1874                         out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);
1875
1876                         if (switchdev_port_same_parent_id(priv->netdev,
1877                                                           out_dev)) {
1878                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
1879                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1880                                 out_priv = netdev_priv(out_dev);
1881                                 rpriv = out_priv->ppriv;
1882                                 attr->out_rep = rpriv->rep;
1883                         } else if (encap) {
1884                                 err = mlx5e_attach_encap(priv, info,
1885                                                          out_dev, &encap_dev, flow);
1886                                 if (err && err != -EAGAIN)
1887                                         return err;
1888                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_ENCAP |
1889                                         MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
1890                                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
1891                                 out_priv = netdev_priv(encap_dev);
1892                                 rpriv = out_priv->ppriv;
1893                                 attr->out_rep = rpriv->rep;
1894                                 attr->parse_attr = parse_attr;
1895                         } else {
1896                                 pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
1897                                        priv->netdev->name, out_dev->name);
1898                                 return -EINVAL;
1899                         }
1900                         continue;
1901                 }
1902
1903                 if (is_tcf_tunnel_set(a)) {
1904                         info = tcf_tunnel_info(a);
1905                         if (info)
1906                                 encap = true;
1907                         else
1908                                 return -EOPNOTSUPP;
1909                         continue;
1910                 }
1911
1912                 if (is_tcf_vlan(a)) {
1913                         if (tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
1914                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
1915                         } else if (tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
1916                                 if (tcf_vlan_push_proto(a) != htons(ETH_P_8021Q))
1917                                         return -EOPNOTSUPP;
1918
1919                                 attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
1920                                 attr->vlan = tcf_vlan_push_vid(a);
1921                         } else { /* action is TCA_VLAN_ACT_MODIFY */
1922                                 return -EOPNOTSUPP;
1923                         }
1924                         continue;
1925                 }
1926
1927                 if (is_tcf_tunnel_release(a)) {
1928                         attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
1929                         continue;
1930                 }
1931
1932                 return -EINVAL;
1933         }
1934         return err;
1935 }
1936
1937 int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
1938                            struct tc_cls_flower_offload *f)
1939 {
1940         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
1941         struct mlx5e_tc_flow_parse_attr *parse_attr;
1942         struct mlx5e_tc_table *tc = &priv->fs.tc;
1943         struct mlx5e_tc_flow *flow;
1944         int attr_size, err = 0;
1945         u8 flow_flags = 0;
1946
1947         if (esw && esw->mode == SRIOV_OFFLOADS) {
1948                 flow_flags = MLX5E_TC_FLOW_ESWITCH;
1949                 attr_size  = sizeof(struct mlx5_esw_flow_attr);
1950         } else {
1951                 flow_flags = MLX5E_TC_FLOW_NIC;
1952                 attr_size  = sizeof(struct mlx5_nic_flow_attr);
1953         }
1954
1955         flow = kzalloc(sizeof(*flow) + attr_size, GFP_KERNEL);
1956         parse_attr = kvzalloc(sizeof(*parse_attr), GFP_KERNEL);
1957         if (!parse_attr || !flow) {
1958                 err = -ENOMEM;
1959                 goto err_free;
1960         }
1961
1962         flow->cookie = f->cookie;
1963         flow->flags = flow_flags;
1964
1965         err = parse_cls_flower(priv, flow, &parse_attr->spec, f);
1966         if (err < 0)
1967                 goto err_free;
1968
1969         if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
1970                 err = parse_tc_fdb_actions(priv, f->exts, parse_attr, flow);
1971                 if (err < 0)
1972                         goto err_handle_encap_flow;
1973                 flow->rule = mlx5e_tc_add_fdb_flow(priv, parse_attr, flow);
1974         } else {
1975                 err = parse_tc_nic_actions(priv, f->exts, parse_attr, flow);
1976                 if (err < 0)
1977                         goto err_free;
1978                 flow->rule = mlx5e_tc_add_nic_flow(priv, parse_attr, flow);
1979         }
1980
1981         if (IS_ERR(flow->rule)) {
1982                 err = PTR_ERR(flow->rule);
1983                 goto err_free;
1984         }
1985
1986         flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
1987         err = rhashtable_insert_fast(&tc->ht, &flow->node,
1988                                      tc->ht_params);
1989         if (err)
1990                 goto err_del_rule;
1991
1992         if (flow->flags & MLX5E_TC_FLOW_ESWITCH &&
1993             !(flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP))
1994                 kvfree(parse_attr);
1995         return err;
1996
1997 err_del_rule:
1998         mlx5e_tc_del_flow(priv, flow);
1999
2000 err_handle_encap_flow:
2001         if (err == -EAGAIN) {
2002                 err = rhashtable_insert_fast(&tc->ht, &flow->node,
2003                                              tc->ht_params);
2004                 if (err)
2005                         mlx5e_tc_del_flow(priv, flow);
2006                 else
2007                         return 0;
2008         }
2009
2010 err_free:
2011         kvfree(parse_attr);
2012         kfree(flow);
2013         return err;
2014 }
2015
2016 int mlx5e_delete_flower(struct mlx5e_priv *priv,
2017                         struct tc_cls_flower_offload *f)
2018 {
2019         struct mlx5e_tc_flow *flow;
2020         struct mlx5e_tc_table *tc = &priv->fs.tc;
2021
2022         flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
2023                                       tc->ht_params);
2024         if (!flow)
2025                 return -EINVAL;
2026
2027         rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
2028
2029         mlx5e_tc_del_flow(priv, flow);
2030
2031         kfree(flow);
2032
2033         return 0;
2034 }
2035
2036 int mlx5e_stats_flower(struct mlx5e_priv *priv,
2037                        struct tc_cls_flower_offload *f)
2038 {
2039         struct mlx5e_tc_table *tc = &priv->fs.tc;
2040         struct mlx5e_tc_flow *flow;
2041         struct mlx5_fc *counter;
2042         u64 bytes;
2043         u64 packets;
2044         u64 lastuse;
2045
2046         flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
2047                                       tc->ht_params);
2048         if (!flow)
2049                 return -EINVAL;
2050
2051         if (!(flow->flags & MLX5E_TC_FLOW_OFFLOADED))
2052                 return 0;
2053
2054         counter = mlx5_flow_rule_counter(flow->rule);
2055         if (!counter)
2056                 return 0;
2057
2058         mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
2059
2060         tcf_exts_stats_update(f->exts, bytes, packets, lastuse);
2061
2062         return 0;
2063 }
2064
2065 static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
2066         .head_offset = offsetof(struct mlx5e_tc_flow, node),
2067         .key_offset = offsetof(struct mlx5e_tc_flow, cookie),
2068         .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
2069         .automatic_shrinking = true,
2070 };
2071
2072 int mlx5e_tc_init(struct mlx5e_priv *priv)
2073 {
2074         struct mlx5e_tc_table *tc = &priv->fs.tc;
2075
2076         hash_init(tc->mod_hdr_tbl);
2077
2078         tc->ht_params = mlx5e_tc_flow_ht_params;
2079         return rhashtable_init(&tc->ht, &tc->ht_params);
2080 }
2081
2082 static void _mlx5e_tc_del_flow(void *ptr, void *arg)
2083 {
2084         struct mlx5e_tc_flow *flow = ptr;
2085         struct mlx5e_priv *priv = arg;
2086
2087         mlx5e_tc_del_flow(priv, flow);
2088         kfree(flow);
2089 }
2090
2091 void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
2092 {
2093         struct mlx5e_tc_table *tc = &priv->fs.tc;
2094
2095         rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
2096
2097         if (!IS_ERR_OR_NULL(tc->t)) {
2098                 mlx5_destroy_flow_table(tc->t);
2099                 tc->t = NULL;
2100         }
2101 }