drivers/net/ethernet/netronome/nfp/flower/offload.c

   1 /*
   2  * Copyright (C) 2017 Netronome Systems, Inc.
   3  *
   4  * This software is dual licensed under the GNU General License Version 2,
   5  * June 1991 as shown in the file COPYING in the top-level directory of this
   6  * source tree or the BSD 2-Clause License provided below.  You have the
   7  * option to license this software under the complete terms of either license.
   8  *
   9  * The BSD 2-Clause License:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      1. Redistributions of source code must retain the above
  16  *         copyright notice, this list of conditions and the following
  17  *         disclaimer.
  18  *
  19  *      2. Redistributions in binary form must reproduce the above
  20  *         copyright notice, this list of conditions and the following
  21  *         disclaimer in the documentation and/or other materials
  22  *         provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/skbuff.h>
  35 #include <net/devlink.h>
  36 #include <net/pkt_cls.h>
  37
  38 #include "cmsg.h"
  39 #include "main.h"
  40 #include "../nfpcore/nfp_cpp.h"
  41 #include "../nfpcore/nfp_nsp.h"
  42 #include "../nfp_app.h"
  43 #include "../nfp_main.h"
  44 #include "../nfp_net.h"
  45 #include "../nfp_port.h"
  46
  47 #define NFP_FLOWER_WHITELIST_DISSECTOR \
  48         (BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
  49          BIT(FLOW_DISSECTOR_KEY_BASIC) | \
  50          BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
  51          BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
  52          BIT(FLOW_DISSECTOR_KEY_PORTS) | \
  53          BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
  54          BIT(FLOW_DISSECTOR_KEY_VLAN) | \
  55          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  56          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  57          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  58          BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  59          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
  60          BIT(FLOW_DISSECTOR_KEY_MPLS) | \
  61          BIT(FLOW_DISSECTOR_KEY_IP))
  62
  63 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
  64         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  65          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  66          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  67          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  68          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
  69
  70 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
  71         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  72          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  73          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
  74
  75 static int
  76 nfp_flower_xmit_flow(struct net_device *netdev,
  77                      struct nfp_fl_payload *nfp_flow, u8 mtype)
  78 {
  79         u32 meta_len, key_len, mask_len, act_len, tot_len;
  80         struct nfp_repr *priv = netdev_priv(netdev);
  81         struct sk_buff *skb;
  82         unsigned char *msg;
  83
  84         meta_len =  sizeof(struct nfp_fl_rule_metadata);
  85         key_len = nfp_flow->meta.key_len;
  86         mask_len = nfp_flow->meta.mask_len;
  87         act_len = nfp_flow->meta.act_len;
  88
  89         tot_len = meta_len + key_len + mask_len + act_len;
  90
  91         /* Convert to long words as firmware expects
  92          * lengths in units of NFP_FL_LW_SIZ.
  93          */
  94         nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
  95         nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
  96         nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
  97
  98         skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype, GFP_KERNEL);
  99         if (!skb)
 100                 return -ENOMEM;
 101
 102         msg = nfp_flower_cmsg_get_data(skb);
 103         memcpy(msg, &nfp_flow->meta, meta_len);
 104         memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
 105         memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
 106         memcpy(&msg[meta_len + key_len + mask_len],
 107                nfp_flow->action_data, act_len);
 108
 109         /* Convert back to bytes as software expects
 110          * lengths in units of bytes.
 111          */
 112         nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
 113         nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
 114         nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
 115
 116         nfp_ctrl_tx(priv->app->ctrl, skb);
 117
 118         return 0;
 119 }
 120
 121 static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
 122 {
 123         return dissector_uses_key(f->dissector,
 124                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
 125                 dissector_uses_key(f->dissector,
 126                                    FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
 127                 dissector_uses_key(f->dissector,
 128                                    FLOW_DISSECTOR_KEY_PORTS) ||
 129                 dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
 130 }
 131
 132 static int
 133 nfp_flower_calculate_key_layers(struct nfp_app *app,
 134                                 struct nfp_fl_key_ls *ret_key_ls,
 135                                 struct tc_cls_flower_offload *flow,
 136                                 bool egress,
 137                                 enum nfp_flower_tun_type *tun_type)
 138 {
 139         struct flow_dissector_key_basic *mask_basic = NULL;
 140         struct flow_dissector_key_basic *key_basic = NULL;
 141         struct nfp_flower_priv *priv = app->priv;
 142         u32 key_layer_two;
 143         u8 key_layer;
 144         int key_size;
 145
 146         if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR)
 147                 return -EOPNOTSUPP;
 148
 149         /* If any tun dissector is used then the required set must be used. */
 150         if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
 151             (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 152             != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 153                 return -EOPNOTSUPP;
 154
 155         key_layer_two = 0;
 156         key_layer = NFP_FLOWER_LAYER_PORT;
 157         key_size = sizeof(struct nfp_flower_meta_tci) +
 158                    sizeof(struct nfp_flower_in_port);
 159
 160         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||
 161             dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) {
 162                 key_layer |= NFP_FLOWER_LAYER_MAC;
 163                 key_size += sizeof(struct nfp_flower_mac_mpls);
 164         }
 165
 166         if (dissector_uses_key(flow->dissector,
 167                                FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
 168                 struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL;
 169                 struct flow_dissector_key_ports *mask_enc_ports = NULL;
 170                 struct flow_dissector_key_ports *enc_ports = NULL;
 171                 struct flow_dissector_key_control *mask_enc_ctl =
 172                         skb_flow_dissector_target(flow->dissector,
 173                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 174                                                   flow->mask);
 175                 struct flow_dissector_key_control *enc_ctl =
 176                         skb_flow_dissector_target(flow->dissector,
 177                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 178                                                   flow->key);
 179                 if (!egress)
 180                         return -EOPNOTSUPP;
 181
 182                 if (mask_enc_ctl->addr_type != 0xffff ||
 183                     enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS)
 184                         return -EOPNOTSUPP;
 185
 186                 /* These fields are already verified as used. */
 187                 mask_ipv4 =
 188                         skb_flow_dissector_target(flow->dissector,
 189                                                   FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 190                                                   flow->mask);
 191                 if (mask_ipv4->dst != cpu_to_be32(~0))
 192                         return -EOPNOTSUPP;
 193
 194                 mask_enc_ports =
 195                         skb_flow_dissector_target(flow->dissector,
 196                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 197                                                   flow->mask);
 198                 enc_ports =
 199                         skb_flow_dissector_target(flow->dissector,
 200                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 201                                                   flow->key);
 202
 203                 if (mask_enc_ports->dst != cpu_to_be16(~0))
 204                         return -EOPNOTSUPP;
 205
 206                 switch (enc_ports->dst) {
 207                 case htons(NFP_FL_VXLAN_PORT):
 208                         *tun_type = NFP_FL_TUNNEL_VXLAN;
 209                         key_layer |= NFP_FLOWER_LAYER_VXLAN;
 210                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 211                         break;
 212                 case htons(NFP_FL_GENEVE_PORT):
 213                         if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE))
 214                                 return -EOPNOTSUPP;
 215                         *tun_type = NFP_FL_TUNNEL_GENEVE;
 216                         key_layer |= NFP_FLOWER_LAYER_EXT_META;
 217                         key_size += sizeof(struct nfp_flower_ext_meta);
 218                         key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
 219                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 220                         break;
 221                 default:
 222                         return -EOPNOTSUPP;
 223                 }
 224         } else if (egress) {
 225                 /* Reject non tunnel matches offloaded to egress repr. */
 226                 return -EOPNOTSUPP;
 227         }
 228
 229         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 230                 mask_basic = skb_flow_dissector_target(flow->dissector,
 231                                                        FLOW_DISSECTOR_KEY_BASIC,
 232                                                        flow->mask);
 233
 234                 key_basic = skb_flow_dissector_target(flow->dissector,
 235                                                       FLOW_DISSECTOR_KEY_BASIC,
 236                                                       flow->key);
 237         }
 238
 239         if (mask_basic && mask_basic->n_proto) {
 240                 /* Ethernet type is present in the key. */
 241                 switch (key_basic->n_proto) {
 242                 case cpu_to_be16(ETH_P_IP):
 243                         key_layer |= NFP_FLOWER_LAYER_IPV4;
 244                         key_size += sizeof(struct nfp_flower_ipv4);
 245                         break;
 246
 247                 case cpu_to_be16(ETH_P_IPV6):
 248                         key_layer |= NFP_FLOWER_LAYER_IPV6;
 249                         key_size += sizeof(struct nfp_flower_ipv6);
 250                         break;
 251
 252                 /* Currently we do not offload ARP
 253                  * because we rely on it to get to the host.
 254                  */
 255                 case cpu_to_be16(ETH_P_ARP):
 256                         return -EOPNOTSUPP;
 257
 258                 /* Will be included in layer 2. */
 259                 case cpu_to_be16(ETH_P_8021Q):
 260                         break;
 261
 262                 default:
 263                         /* Other ethtype - we need check the masks for the
 264                          * remainder of the key to ensure we can offload.
 265                          */
 266                         if (nfp_flower_check_higher_than_mac(flow))
 267                                 return -EOPNOTSUPP;
 268                         break;
 269                 }
 270         }
 271
 272         if (mask_basic && mask_basic->ip_proto) {
 273                 /* Ethernet type is present in the key. */
 274                 switch (key_basic->ip_proto) {
 275                 case IPPROTO_TCP:
 276                 case IPPROTO_UDP:
 277                 case IPPROTO_SCTP:
 278                 case IPPROTO_ICMP:
 279                 case IPPROTO_ICMPV6:
 280                         key_layer |= NFP_FLOWER_LAYER_TP;
 281                         key_size += sizeof(struct nfp_flower_tp_ports);
 282                         break;
 283                 default:
 284                         /* Other ip proto - we need check the masks for the
 285                          * remainder of the key to ensure we can offload.
 286                          */
 287                         return -EOPNOTSUPP;
 288                 }
 289         }
 290
 291         ret_key_ls->key_layer = key_layer;
 292         ret_key_ls->key_layer_two = key_layer_two;
 293         ret_key_ls->key_size = key_size;
 294
 295         return 0;
 296 }
 297
 298 static struct nfp_fl_payload *
 299 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
 300 {
 301         struct nfp_fl_payload *flow_pay;
 302
 303         flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
 304         if (!flow_pay)
 305                 return NULL;
 306
 307         flow_pay->meta.key_len = key_layer->key_size;
 308         flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 309         if (!flow_pay->unmasked_data)
 310                 goto err_free_flow;
 311
 312         flow_pay->meta.mask_len = key_layer->key_size;
 313         flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 314         if (!flow_pay->mask_data)
 315                 goto err_free_unmasked;
 316
 317         flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
 318         if (!flow_pay->action_data)
 319                 goto err_free_mask;
 320
 321         flow_pay->nfp_tun_ipv4_addr = 0;
 322         flow_pay->meta.flags = 0;
 323         spin_lock_init(&flow_pay->lock);
 324
 325         return flow_pay;
 326
 327 err_free_mask:
 328         kfree(flow_pay->mask_data);
 329 err_free_unmasked:
 330         kfree(flow_pay->unmasked_data);
 331 err_free_flow:
 332         kfree(flow_pay);
 333         return NULL;
 334 }
 335
 336 /**
 337  * nfp_flower_add_offload() - Adds a new flow to hardware.
 338  * @app:        Pointer to the APP handle
 339  * @netdev:     netdev structure.
 340  * @flow:       TC flower classifier offload structure.
 341  * @egress:     NFP netdev is the egress.
 342  *
 343  * Adds a new flow to the repeated hash structure and action payload.
 344  *
 345  * Return: negative value on error, 0 if configured successfully.
 346  */
 347 static int
 348 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 349                        struct tc_cls_flower_offload *flow, bool egress)
 350 {
 351         enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
 352         struct nfp_port *port = nfp_port_from_netdev(netdev);
 353         struct nfp_flower_priv *priv = app->priv;
 354         struct nfp_fl_payload *flow_pay;
 355         struct nfp_fl_key_ls *key_layer;
 356         int err;
 357
 358         key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
 359         if (!key_layer)
 360                 return -ENOMEM;
 361
 362         err = nfp_flower_calculate_key_layers(app, key_layer, flow, egress,
 363                                               &tun_type);
 364         if (err)
 365                 goto err_free_key_ls;
 366
 367         flow_pay = nfp_flower_allocate_new(key_layer);
 368         if (!flow_pay) {
 369                 err = -ENOMEM;
 370                 goto err_free_key_ls;
 371         }
 372
 373         err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay,
 374                                             tun_type);
 375         if (err)
 376                 goto err_destroy_flow;
 377
 378         err = nfp_flower_compile_action(flow, netdev, flow_pay);
 379         if (err)
 380                 goto err_destroy_flow;
 381
 382         err = nfp_compile_flow_metadata(app, flow, flow_pay);
 383         if (err)
 384                 goto err_destroy_flow;
 385
 386         err = nfp_flower_xmit_flow(netdev, flow_pay,
 387                                    NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
 388         if (err)
 389                 goto err_destroy_flow;
 390
 391         INIT_HLIST_NODE(&flow_pay->link);
 392         flow_pay->tc_flower_cookie = flow->cookie;
 393         hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie);
 394         port->tc_offload_cnt++;
 395
 396         /* Deallocate flow payload when flower rule has been destroyed. */
 397         kfree(key_layer);
 398
 399         return 0;
 400
 401 err_destroy_flow:
 402         kfree(flow_pay->action_data);
 403         kfree(flow_pay->mask_data);
 404         kfree(flow_pay->unmasked_data);
 405         kfree(flow_pay);
 406 err_free_key_ls:
 407         kfree(key_layer);
 408         return err;
 409 }
 410
 411 /**
 412  * nfp_flower_del_offload() - Removes a flow from hardware.
 413  * @app:        Pointer to the APP handle
 414  * @netdev:     netdev structure.
 415  * @flow:       TC flower classifier offload structure
 416  *
 417  * Removes a flow from the repeated hash structure and clears the
 418  * action payload.
 419  *
 420  * Return: negative value on error, 0 if removed successfully.
 421  */
 422 static int
 423 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
 424                        struct tc_cls_flower_offload *flow)
 425 {
 426         struct nfp_port *port = nfp_port_from_netdev(netdev);
 427         struct nfp_fl_payload *nfp_flow;
 428         int err;
 429
 430         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
 431         if (!nfp_flow)
 432                 return -ENOENT;
 433
 434         err = nfp_modify_flow_metadata(app, nfp_flow);
 435         if (err)
 436                 goto err_free_flow;
 437
 438         if (nfp_flow->nfp_tun_ipv4_addr)
 439                 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
 440
 441         err = nfp_flower_xmit_flow(netdev, nfp_flow,
 442                                    NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
 443         if (err)
 444                 goto err_free_flow;
 445
 446 err_free_flow:
 447         hash_del_rcu(&nfp_flow->link);
 448         port->tc_offload_cnt--;
 449         kfree(nfp_flow->action_data);
 450         kfree(nfp_flow->mask_data);
 451         kfree(nfp_flow->unmasked_data);
 452         kfree_rcu(nfp_flow, rcu);
 453         return err;
 454 }
 455
 456 /**
 457  * nfp_flower_get_stats() - Populates flow stats obtained from hardware.
 458  * @app:        Pointer to the APP handle
 459  * @flow:       TC flower classifier offload structure
 460  *
 461  * Populates a flow statistics structure which which corresponds to a
 462  * specific flow.
 463  *
 464  * Return: negative value on error, 0 if stats populated successfully.
 465  */
 466 static int
 467 nfp_flower_get_stats(struct nfp_app *app, struct tc_cls_flower_offload *flow)
 468 {
 469         struct nfp_fl_payload *nfp_flow;
 470
 471         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
 472         if (!nfp_flow)
 473                 return -EINVAL;
 474
 475         spin_lock_bh(&nfp_flow->lock);
 476         tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes,
 477                               nfp_flow->stats.pkts, nfp_flow->stats.used);
 478
 479         nfp_flow->stats.pkts = 0;
 480         nfp_flow->stats.bytes = 0;
 481         spin_unlock_bh(&nfp_flow->lock);
 482
 483         return 0;
 484 }
 485
 486 static int
 487 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
 488                         struct tc_cls_flower_offload *flower, bool egress)
 489 {
 490         if (!eth_proto_is_802_3(flower->common.protocol))
 491                 return -EOPNOTSUPP;
 492
 493         switch (flower->command) {
 494         case TC_CLSFLOWER_REPLACE:
 495                 return nfp_flower_add_offload(app, netdev, flower, egress);
 496         case TC_CLSFLOWER_DESTROY:
 497                 return nfp_flower_del_offload(app, netdev, flower);
 498         case TC_CLSFLOWER_STATS:
 499                 return nfp_flower_get_stats(app, flower);
 500         }
 501
 502         return -EOPNOTSUPP;
 503 }
 504
 505 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data,
 506                                   void *cb_priv)
 507 {
 508         struct nfp_repr *repr = cb_priv;
 509
 510         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 511                 return -EOPNOTSUPP;
 512
 513         switch (type) {
 514         case TC_SETUP_CLSFLOWER:
 515                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 516                                                type_data, true);
 517         default:
 518                 return -EOPNOTSUPP;
 519         }
 520 }
 521
 522 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
 523                                         void *type_data, void *cb_priv)
 524 {
 525         struct nfp_repr *repr = cb_priv;
 526
 527         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 528                 return -EOPNOTSUPP;
 529
 530         switch (type) {
 531         case TC_SETUP_CLSFLOWER:
 532                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 533                                                type_data, false);
 534         default:
 535                 return -EOPNOTSUPP;
 536         }
 537 }
 538
 539 static int nfp_flower_setup_tc_block(struct net_device *netdev,
 540                                      struct tc_block_offload *f)
 541 {
 542         struct nfp_repr *repr = netdev_priv(netdev);
 543
 544         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 545                 return -EOPNOTSUPP;
 546
 547         switch (f->command) {
 548         case TC_BLOCK_BIND:
 549                 return tcf_block_cb_register(f->block,
 550                                              nfp_flower_setup_tc_block_cb,
 551                                              repr, repr);
 552         case TC_BLOCK_UNBIND:
 553                 tcf_block_cb_unregister(f->block,
 554                                         nfp_flower_setup_tc_block_cb,
 555                                         repr);
 556                 return 0;
 557         default:
 558                 return -EOPNOTSUPP;
 559         }
 560 }
 561
 562 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
 563                         enum tc_setup_type type, void *type_data)
 564 {
 565         switch (type) {
 566         case TC_SETUP_BLOCK:
 567                 return nfp_flower_setup_tc_block(netdev, type_data);
 568         default:
 569                 return -EOPNOTSUPP;
 570         }
 571 }