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_SUPPORTED_TCPFLAGS \
  48         (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST | \
  49          TCPHDR_PSH | TCPHDR_URG)
  50
  51 #define NFP_FLOWER_SUPPORTED_CTLFLAGS \
  52         (FLOW_DIS_IS_FRAGMENT | \
  53          FLOW_DIS_FIRST_FRAG)
  54
  55 #define NFP_FLOWER_WHITELIST_DISSECTOR \
  56         (BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
  57          BIT(FLOW_DISSECTOR_KEY_BASIC) | \
  58          BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
  59          BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
  60          BIT(FLOW_DISSECTOR_KEY_TCP) | \
  61          BIT(FLOW_DISSECTOR_KEY_PORTS) | \
  62          BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
  63          BIT(FLOW_DISSECTOR_KEY_VLAN) | \
  64          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  65          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  66          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  67          BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  68          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
  69          BIT(FLOW_DISSECTOR_KEY_MPLS) | \
  70          BIT(FLOW_DISSECTOR_KEY_IP))
  71
  72 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
  73         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  74          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  75          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  76          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  77          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
  78
  79 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
  80         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  81          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  82          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
  83
  84 static int
  85 nfp_flower_xmit_flow(struct net_device *netdev,
  86                      struct nfp_fl_payload *nfp_flow, u8 mtype)
  87 {
  88         u32 meta_len, key_len, mask_len, act_len, tot_len;
  89         struct nfp_repr *priv = netdev_priv(netdev);
  90         struct sk_buff *skb;
  91         unsigned char *msg;
  92
  93         meta_len =  sizeof(struct nfp_fl_rule_metadata);
  94         key_len = nfp_flow->meta.key_len;
  95         mask_len = nfp_flow->meta.mask_len;
  96         act_len = nfp_flow->meta.act_len;
  97
  98         tot_len = meta_len + key_len + mask_len + act_len;
  99
 100         /* Convert to long words as firmware expects
 101          * lengths in units of NFP_FL_LW_SIZ.
 102          */
 103         nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
 104         nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
 105         nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
 106
 107         skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype, GFP_KERNEL);
 108         if (!skb)
 109                 return -ENOMEM;
 110
 111         msg = nfp_flower_cmsg_get_data(skb);
 112         memcpy(msg, &nfp_flow->meta, meta_len);
 113         memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
 114         memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
 115         memcpy(&msg[meta_len + key_len + mask_len],
 116                nfp_flow->action_data, act_len);
 117
 118         /* Convert back to bytes as software expects
 119          * lengths in units of bytes.
 120          */
 121         nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
 122         nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
 123         nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
 124
 125         nfp_ctrl_tx(priv->app->ctrl, skb);
 126
 127         return 0;
 128 }
 129
 130 static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
 131 {
 132         return dissector_uses_key(f->dissector,
 133                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
 134                 dissector_uses_key(f->dissector,
 135                                    FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
 136                 dissector_uses_key(f->dissector,
 137                                    FLOW_DISSECTOR_KEY_PORTS) ||
 138                 dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
 139 }
 140
 141 static int
 142 nfp_flower_calculate_key_layers(struct nfp_app *app,
 143                                 struct nfp_fl_key_ls *ret_key_ls,
 144                                 struct tc_cls_flower_offload *flow,
 145                                 bool egress,
 146                                 enum nfp_flower_tun_type *tun_type)
 147 {
 148         struct flow_dissector_key_basic *mask_basic = NULL;
 149         struct flow_dissector_key_basic *key_basic = NULL;
 150         struct nfp_flower_priv *priv = app->priv;
 151         u32 key_layer_two;
 152         u8 key_layer;
 153         int key_size;
 154
 155         if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR)
 156                 return -EOPNOTSUPP;
 157
 158         /* If any tun dissector is used then the required set must be used. */
 159         if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
 160             (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 161             != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 162                 return -EOPNOTSUPP;
 163
 164         key_layer_two = 0;
 165         key_layer = NFP_FLOWER_LAYER_PORT;
 166         key_size = sizeof(struct nfp_flower_meta_tci) +
 167                    sizeof(struct nfp_flower_in_port);
 168
 169         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||
 170             dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) {
 171                 key_layer |= NFP_FLOWER_LAYER_MAC;
 172                 key_size += sizeof(struct nfp_flower_mac_mpls);
 173         }
 174
 175         if (dissector_uses_key(flow->dissector,
 176                                FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
 177                 struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL;
 178                 struct flow_dissector_key_ports *mask_enc_ports = NULL;
 179                 struct flow_dissector_key_ports *enc_ports = NULL;
 180                 struct flow_dissector_key_control *mask_enc_ctl =
 181                         skb_flow_dissector_target(flow->dissector,
 182                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 183                                                   flow->mask);
 184                 struct flow_dissector_key_control *enc_ctl =
 185                         skb_flow_dissector_target(flow->dissector,
 186                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 187                                                   flow->key);
 188                 if (!egress)
 189                         return -EOPNOTSUPP;
 190
 191                 if (mask_enc_ctl->addr_type != 0xffff ||
 192                     enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS)
 193                         return -EOPNOTSUPP;
 194
 195                 /* These fields are already verified as used. */
 196                 mask_ipv4 =
 197                         skb_flow_dissector_target(flow->dissector,
 198                                                   FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 199                                                   flow->mask);
 200                 if (mask_ipv4->dst != cpu_to_be32(~0))
 201                         return -EOPNOTSUPP;
 202
 203                 mask_enc_ports =
 204                         skb_flow_dissector_target(flow->dissector,
 205                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 206                                                   flow->mask);
 207                 enc_ports =
 208                         skb_flow_dissector_target(flow->dissector,
 209                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 210                                                   flow->key);
 211
 212                 if (mask_enc_ports->dst != cpu_to_be16(~0))
 213                         return -EOPNOTSUPP;
 214
 215                 switch (enc_ports->dst) {
 216                 case htons(NFP_FL_VXLAN_PORT):
 217                         *tun_type = NFP_FL_TUNNEL_VXLAN;
 218                         key_layer |= NFP_FLOWER_LAYER_VXLAN;
 219                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 220                         break;
 221                 case htons(NFP_FL_GENEVE_PORT):
 222                         if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE))
 223                                 return -EOPNOTSUPP;
 224                         *tun_type = NFP_FL_TUNNEL_GENEVE;
 225                         key_layer |= NFP_FLOWER_LAYER_EXT_META;
 226                         key_size += sizeof(struct nfp_flower_ext_meta);
 227                         key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
 228                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 229                         break;
 230                 default:
 231                         return -EOPNOTSUPP;
 232                 }
 233         } else if (egress) {
 234                 /* Reject non tunnel matches offloaded to egress repr. */
 235                 return -EOPNOTSUPP;
 236         }
 237
 238         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 239                 mask_basic = skb_flow_dissector_target(flow->dissector,
 240                                                        FLOW_DISSECTOR_KEY_BASIC,
 241                                                        flow->mask);
 242
 243                 key_basic = skb_flow_dissector_target(flow->dissector,
 244                                                       FLOW_DISSECTOR_KEY_BASIC,
 245                                                       flow->key);
 246         }
 247
 248         if (mask_basic && mask_basic->n_proto) {
 249                 /* Ethernet type is present in the key. */
 250                 switch (key_basic->n_proto) {
 251                 case cpu_to_be16(ETH_P_IP):
 252                         key_layer |= NFP_FLOWER_LAYER_IPV4;
 253                         key_size += sizeof(struct nfp_flower_ipv4);
 254                         break;
 255
 256                 case cpu_to_be16(ETH_P_IPV6):
 257                         key_layer |= NFP_FLOWER_LAYER_IPV6;
 258                         key_size += sizeof(struct nfp_flower_ipv6);
 259                         break;
 260
 261                 /* Currently we do not offload ARP
 262                  * because we rely on it to get to the host.
 263                  */
 264                 case cpu_to_be16(ETH_P_ARP):
 265                         return -EOPNOTSUPP;
 266
 267                 /* Will be included in layer 2. */
 268                 case cpu_to_be16(ETH_P_8021Q):
 269                         break;
 270
 271                 default:
 272                         /* Other ethtype - we need check the masks for the
 273                          * remainder of the key to ensure we can offload.
 274                          */
 275                         if (nfp_flower_check_higher_than_mac(flow))
 276                                 return -EOPNOTSUPP;
 277                         break;
 278                 }
 279         }
 280
 281         if (mask_basic && mask_basic->ip_proto) {
 282                 /* Ethernet type is present in the key. */
 283                 switch (key_basic->ip_proto) {
 284                 case IPPROTO_TCP:
 285                 case IPPROTO_UDP:
 286                 case IPPROTO_SCTP:
 287                 case IPPROTO_ICMP:
 288                 case IPPROTO_ICMPV6:
 289                         key_layer |= NFP_FLOWER_LAYER_TP;
 290                         key_size += sizeof(struct nfp_flower_tp_ports);
 291                         break;
 292                 default:
 293                         /* Other ip proto - we need check the masks for the
 294                          * remainder of the key to ensure we can offload.
 295                          */
 296                         return -EOPNOTSUPP;
 297                 }
 298         }
 299
 300         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) {
 301                 struct flow_dissector_key_tcp *tcp;
 302                 u32 tcp_flags;
 303
 304                 tcp = skb_flow_dissector_target(flow->dissector,
 305                                                 FLOW_DISSECTOR_KEY_TCP,
 306                                                 flow->key);
 307                 tcp_flags = be16_to_cpu(tcp->flags);
 308
 309                 if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS)
 310                         return -EOPNOTSUPP;
 311
 312                 /* We only support PSH and URG flags when either
 313                  * FIN, SYN or RST is present as well.
 314                  */
 315                 if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) &&
 316                     !(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST)))
 317                         return -EOPNOTSUPP;
 318
 319                 /* We need to store TCP flags in the IPv4 key space, thus
 320                  * we need to ensure we include a IPv4 key layer if we have
 321                  * not done so already.
 322                  */
 323                 if (!(key_layer & NFP_FLOWER_LAYER_IPV4)) {
 324                         key_layer |= NFP_FLOWER_LAYER_IPV4;
 325                         key_size += sizeof(struct nfp_flower_ipv4);
 326                 }
 327         }
 328
 329         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
 330                 struct flow_dissector_key_control *key_ctl;
 331
 332                 key_ctl = skb_flow_dissector_target(flow->dissector,
 333                                                     FLOW_DISSECTOR_KEY_CONTROL,
 334                                                     flow->key);
 335
 336                 if (key_ctl->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS)
 337                         return -EOPNOTSUPP;
 338         }
 339
 340         ret_key_ls->key_layer = key_layer;
 341         ret_key_ls->key_layer_two = key_layer_two;
 342         ret_key_ls->key_size = key_size;
 343
 344         return 0;
 345 }
 346
 347 static struct nfp_fl_payload *
 348 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
 349 {
 350         struct nfp_fl_payload *flow_pay;
 351
 352         flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
 353         if (!flow_pay)
 354                 return NULL;
 355
 356         flow_pay->meta.key_len = key_layer->key_size;
 357         flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 358         if (!flow_pay->unmasked_data)
 359                 goto err_free_flow;
 360
 361         flow_pay->meta.mask_len = key_layer->key_size;
 362         flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 363         if (!flow_pay->mask_data)
 364                 goto err_free_unmasked;
 365
 366         flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
 367         if (!flow_pay->action_data)
 368                 goto err_free_mask;
 369
 370         flow_pay->nfp_tun_ipv4_addr = 0;
 371         flow_pay->meta.flags = 0;
 372         spin_lock_init(&flow_pay->lock);
 373
 374         return flow_pay;
 375
 376 err_free_mask:
 377         kfree(flow_pay->mask_data);
 378 err_free_unmasked:
 379         kfree(flow_pay->unmasked_data);
 380 err_free_flow:
 381         kfree(flow_pay);
 382         return NULL;
 383 }
 384
 385 /**
 386  * nfp_flower_add_offload() - Adds a new flow to hardware.
 387  * @app:        Pointer to the APP handle
 388  * @netdev:     netdev structure.
 389  * @flow:       TC flower classifier offload structure.
 390  * @egress:     NFP netdev is the egress.
 391  *
 392  * Adds a new flow to the repeated hash structure and action payload.
 393  *
 394  * Return: negative value on error, 0 if configured successfully.
 395  */
 396 static int
 397 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 398                        struct tc_cls_flower_offload *flow, bool egress)
 399 {
 400         enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
 401         struct nfp_port *port = nfp_port_from_netdev(netdev);
 402         struct nfp_flower_priv *priv = app->priv;
 403         struct nfp_fl_payload *flow_pay;
 404         struct nfp_fl_key_ls *key_layer;
 405         int err;
 406
 407         key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
 408         if (!key_layer)
 409                 return -ENOMEM;
 410
 411         err = nfp_flower_calculate_key_layers(app, key_layer, flow, egress,
 412                                               &tun_type);
 413         if (err)
 414                 goto err_free_key_ls;
 415
 416         flow_pay = nfp_flower_allocate_new(key_layer);
 417         if (!flow_pay) {
 418                 err = -ENOMEM;
 419                 goto err_free_key_ls;
 420         }
 421
 422         err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay,
 423                                             tun_type);
 424         if (err)
 425                 goto err_destroy_flow;
 426
 427         err = nfp_flower_compile_action(flow, netdev, flow_pay);
 428         if (err)
 429                 goto err_destroy_flow;
 430
 431         err = nfp_compile_flow_metadata(app, flow, flow_pay);
 432         if (err)
 433                 goto err_destroy_flow;
 434
 435         err = nfp_flower_xmit_flow(netdev, flow_pay,
 436                                    NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
 437         if (err)
 438                 goto err_destroy_flow;
 439
 440         INIT_HLIST_NODE(&flow_pay->link);
 441         flow_pay->tc_flower_cookie = flow->cookie;
 442         hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie);
 443         port->tc_offload_cnt++;
 444
 445         /* Deallocate flow payload when flower rule has been destroyed. */
 446         kfree(key_layer);
 447
 448         return 0;
 449
 450 err_destroy_flow:
 451         kfree(flow_pay->action_data);
 452         kfree(flow_pay->mask_data);
 453         kfree(flow_pay->unmasked_data);
 454         kfree(flow_pay);
 455 err_free_key_ls:
 456         kfree(key_layer);
 457         return err;
 458 }
 459
 460 /**
 461  * nfp_flower_del_offload() - Removes a flow from hardware.
 462  * @app:        Pointer to the APP handle
 463  * @netdev:     netdev structure.
 464  * @flow:       TC flower classifier offload structure
 465  *
 466  * Removes a flow from the repeated hash structure and clears the
 467  * action payload.
 468  *
 469  * Return: negative value on error, 0 if removed successfully.
 470  */
 471 static int
 472 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
 473                        struct tc_cls_flower_offload *flow)
 474 {
 475         struct nfp_port *port = nfp_port_from_netdev(netdev);
 476         struct nfp_fl_payload *nfp_flow;
 477         int err;
 478
 479         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
 480         if (!nfp_flow)
 481                 return -ENOENT;
 482
 483         err = nfp_modify_flow_metadata(app, nfp_flow);
 484         if (err)
 485                 goto err_free_flow;
 486
 487         if (nfp_flow->nfp_tun_ipv4_addr)
 488                 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
 489
 490         err = nfp_flower_xmit_flow(netdev, nfp_flow,
 491                                    NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
 492         if (err)
 493                 goto err_free_flow;
 494
 495 err_free_flow:
 496         hash_del_rcu(&nfp_flow->link);
 497         port->tc_offload_cnt--;
 498         kfree(nfp_flow->action_data);
 499         kfree(nfp_flow->mask_data);
 500         kfree(nfp_flow->unmasked_data);
 501         kfree_rcu(nfp_flow, rcu);
 502         return err;
 503 }
 504
 505 /**
 506  * nfp_flower_get_stats() - Populates flow stats obtained from hardware.
 507  * @app:        Pointer to the APP handle
 508  * @flow:       TC flower classifier offload structure
 509  *
 510  * Populates a flow statistics structure which which corresponds to a
 511  * specific flow.
 512  *
 513  * Return: negative value on error, 0 if stats populated successfully.
 514  */
 515 static int
 516 nfp_flower_get_stats(struct nfp_app *app, struct tc_cls_flower_offload *flow)
 517 {
 518         struct nfp_fl_payload *nfp_flow;
 519
 520         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
 521         if (!nfp_flow)
 522                 return -EINVAL;
 523
 524         spin_lock_bh(&nfp_flow->lock);
 525         tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes,
 526                               nfp_flow->stats.pkts, nfp_flow->stats.used);
 527
 528         nfp_flow->stats.pkts = 0;
 529         nfp_flow->stats.bytes = 0;
 530         spin_unlock_bh(&nfp_flow->lock);
 531
 532         return 0;
 533 }
 534
 535 static int
 536 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
 537                         struct tc_cls_flower_offload *flower, bool egress)
 538 {
 539         if (!eth_proto_is_802_3(flower->common.protocol))
 540                 return -EOPNOTSUPP;
 541
 542         switch (flower->command) {
 543         case TC_CLSFLOWER_REPLACE:
 544                 return nfp_flower_add_offload(app, netdev, flower, egress);
 545         case TC_CLSFLOWER_DESTROY:
 546                 return nfp_flower_del_offload(app, netdev, flower);
 547         case TC_CLSFLOWER_STATS:
 548                 return nfp_flower_get_stats(app, flower);
 549         }
 550
 551         return -EOPNOTSUPP;
 552 }
 553
 554 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data,
 555                                   void *cb_priv)
 556 {
 557         struct nfp_repr *repr = cb_priv;
 558
 559         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 560                 return -EOPNOTSUPP;
 561
 562         switch (type) {
 563         case TC_SETUP_CLSFLOWER:
 564                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 565                                                type_data, true);
 566         default:
 567                 return -EOPNOTSUPP;
 568         }
 569 }
 570
 571 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
 572                                         void *type_data, void *cb_priv)
 573 {
 574         struct nfp_repr *repr = cb_priv;
 575
 576         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 577                 return -EOPNOTSUPP;
 578
 579         switch (type) {
 580         case TC_SETUP_CLSFLOWER:
 581                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 582                                                type_data, false);
 583         default:
 584                 return -EOPNOTSUPP;
 585         }
 586 }
 587
 588 static int nfp_flower_setup_tc_block(struct net_device *netdev,
 589                                      struct tc_block_offload *f)
 590 {
 591         struct nfp_repr *repr = netdev_priv(netdev);
 592
 593         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 594                 return -EOPNOTSUPP;
 595
 596         switch (f->command) {
 597         case TC_BLOCK_BIND:
 598                 return tcf_block_cb_register(f->block,
 599                                              nfp_flower_setup_tc_block_cb,
 600                                              repr, repr);
 601         case TC_BLOCK_UNBIND:
 602                 tcf_block_cb_unregister(f->block,
 603                                         nfp_flower_setup_tc_block_cb,
 604                                         repr);
 605                 return 0;
 606         default:
 607                 return -EOPNOTSUPP;
 608         }
 609 }
 610
 611 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
 612                         enum tc_setup_type type, void *type_data)
 613 {
 614         switch (type) {
 615         case TC_SETUP_BLOCK:
 616                 return nfp_flower_setup_tc_block(netdev, type_data);
 617         default:
 618                 return -EOPNOTSUPP;
 619         }
 620 }