LXR linux/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
  84static int
  85nfp_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
 130static 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
 141static int
 142nfp_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
 347static struct nfp_fl_payload *
 348nfp_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
 376err_free_mask:
 377        kfree(flow_pay->mask_data);
 378err_free_unmasked:
 379        kfree(flow_pay->unmasked_data);
 380err_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 */
 396static int
 397nfp_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
 450err_destroy_flow:
 451        kfree(flow_pay->action_data);
 452        kfree(flow_pay->mask_data);
 453        kfree(flow_pay->unmasked_data);
 454        kfree(flow_pay);
 455err_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 */
 471static int
 472nfp_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
 495err_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 */
 515static int
 516nfp_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
 535static int
 536nfp_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
 554int 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
 571static 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
 588static 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
 611int 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}
 621