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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #include <linux/skbuff.h>
   5 #include <net/devlink.h>
   6 #include <net/pkt_cls.h>
   7
   8 #include "cmsg.h"
   9 #include "main.h"
  10 #include "../nfpcore/nfp_cpp.h"
  11 #include "../nfpcore/nfp_nsp.h"
  12 #include "../nfp_app.h"
  13 #include "../nfp_main.h"
  14 #include "../nfp_net.h"
  15 #include "../nfp_port.h"
  16
  17 #define NFP_FLOWER_SUPPORTED_TCPFLAGS \
  18         (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST | \
  19          TCPHDR_PSH | TCPHDR_URG)
  20
  21 #define NFP_FLOWER_SUPPORTED_CTLFLAGS \
  22         (FLOW_DIS_IS_FRAGMENT | \
  23          FLOW_DIS_FIRST_FRAG)
  24
  25 #define NFP_FLOWER_WHITELIST_DISSECTOR \
  26         (BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
  27          BIT(FLOW_DISSECTOR_KEY_BASIC) | \
  28          BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
  29          BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
  30          BIT(FLOW_DISSECTOR_KEY_TCP) | \
  31          BIT(FLOW_DISSECTOR_KEY_PORTS) | \
  32          BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
  33          BIT(FLOW_DISSECTOR_KEY_VLAN) | \
  34          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  35          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  36          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  37          BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  38          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
  39          BIT(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
  40          BIT(FLOW_DISSECTOR_KEY_ENC_IP) | \
  41          BIT(FLOW_DISSECTOR_KEY_MPLS) | \
  42          BIT(FLOW_DISSECTOR_KEY_IP))
  43
  44 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
  45         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  46          BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
  47          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  48          BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
  49          BIT(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
  50          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
  51          BIT(FLOW_DISSECTOR_KEY_ENC_IP))
  52
  53 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
  54         (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
  55          BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
  56          BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
  57
  58 static int
  59 nfp_flower_xmit_flow(struct net_device *netdev,
  60                      struct nfp_fl_payload *nfp_flow, u8 mtype)
  61 {
  62         u32 meta_len, key_len, mask_len, act_len, tot_len;
  63         struct nfp_repr *priv = netdev_priv(netdev);
  64         struct sk_buff *skb;
  65         unsigned char *msg;
  66
  67         meta_len =  sizeof(struct nfp_fl_rule_metadata);
  68         key_len = nfp_flow->meta.key_len;
  69         mask_len = nfp_flow->meta.mask_len;
  70         act_len = nfp_flow->meta.act_len;
  71
  72         tot_len = meta_len + key_len + mask_len + act_len;
  73
  74         /* Convert to long words as firmware expects
  75          * lengths in units of NFP_FL_LW_SIZ.
  76          */
  77         nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
  78         nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
  79         nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
  80
  81         skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype, GFP_KERNEL);
  82         if (!skb)
  83                 return -ENOMEM;
  84
  85         msg = nfp_flower_cmsg_get_data(skb);
  86         memcpy(msg, &nfp_flow->meta, meta_len);
  87         memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
  88         memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
  89         memcpy(&msg[meta_len + key_len + mask_len],
  90                nfp_flow->action_data, act_len);
  91
  92         /* Convert back to bytes as software expects
  93          * lengths in units of bytes.
  94          */
  95         nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
  96         nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
  97         nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
  98
  99         nfp_ctrl_tx(priv->app->ctrl, skb);
 100
 101         return 0;
 102 }
 103
 104 static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
 105 {
 106         return dissector_uses_key(f->dissector,
 107                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
 108                 dissector_uses_key(f->dissector,
 109                                    FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
 110                 dissector_uses_key(f->dissector,
 111                                    FLOW_DISSECTOR_KEY_PORTS) ||
 112                 dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
 113 }
 114
 115 static int
 116 nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts,
 117                           u32 *key_layer_two, int *key_size)
 118 {
 119         if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY)
 120                 return -EOPNOTSUPP;
 121
 122         if (enc_opts->len > 0) {
 123                 *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP;
 124                 *key_size += sizeof(struct nfp_flower_geneve_options);
 125         }
 126
 127         return 0;
 128 }
 129
 130 static int
 131 nfp_flower_calculate_key_layers(struct nfp_app *app,
 132                                 struct nfp_fl_key_ls *ret_key_ls,
 133                                 struct tc_cls_flower_offload *flow,
 134                                 bool egress,
 135                                 enum nfp_flower_tun_type *tun_type)
 136 {
 137         struct flow_dissector_key_basic *mask_basic = NULL;
 138         struct flow_dissector_key_basic *key_basic = NULL;
 139         struct nfp_flower_priv *priv = app->priv;
 140         u32 key_layer_two;
 141         u8 key_layer;
 142         int key_size;
 143         int err;
 144
 145         if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR)
 146                 return -EOPNOTSUPP;
 147
 148         /* If any tun dissector is used then the required set must be used. */
 149         if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
 150             (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 151             != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
 152                 return -EOPNOTSUPP;
 153
 154         key_layer_two = 0;
 155         key_layer = NFP_FLOWER_LAYER_PORT;
 156         key_size = sizeof(struct nfp_flower_meta_tci) +
 157                    sizeof(struct nfp_flower_in_port);
 158
 159         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||
 160             dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) {
 161                 key_layer |= NFP_FLOWER_LAYER_MAC;
 162                 key_size += sizeof(struct nfp_flower_mac_mpls);
 163         }
 164
 165         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
 166                 struct flow_dissector_key_vlan *flow_vlan;
 167
 168                 flow_vlan = skb_flow_dissector_target(flow->dissector,
 169                                                       FLOW_DISSECTOR_KEY_VLAN,
 170                                                       flow->mask);
 171                 if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_PCP) &&
 172                     flow_vlan->vlan_priority)
 173                         return -EOPNOTSUPP;
 174         }
 175
 176         if (dissector_uses_key(flow->dissector,
 177                                FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
 178                 struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL;
 179                 struct flow_dissector_key_ports *mask_enc_ports = NULL;
 180                 struct flow_dissector_key_enc_opts *enc_op = NULL;
 181                 struct flow_dissector_key_ports *enc_ports = NULL;
 182                 struct flow_dissector_key_control *mask_enc_ctl =
 183                         skb_flow_dissector_target(flow->dissector,
 184                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 185                                                   flow->mask);
 186                 struct flow_dissector_key_control *enc_ctl =
 187                         skb_flow_dissector_target(flow->dissector,
 188                                                   FLOW_DISSECTOR_KEY_ENC_CONTROL,
 189                                                   flow->key);
 190                 if (!egress)
 191                         return -EOPNOTSUPP;
 192
 193                 if (mask_enc_ctl->addr_type != 0xffff ||
 194                     enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS)
 195                         return -EOPNOTSUPP;
 196
 197                 /* These fields are already verified as used. */
 198                 mask_ipv4 =
 199                         skb_flow_dissector_target(flow->dissector,
 200                                                   FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 201                                                   flow->mask);
 202                 if (mask_ipv4->dst != cpu_to_be32(~0))
 203                         return -EOPNOTSUPP;
 204
 205                 mask_enc_ports =
 206                         skb_flow_dissector_target(flow->dissector,
 207                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 208                                                   flow->mask);
 209                 enc_ports =
 210                         skb_flow_dissector_target(flow->dissector,
 211                                                   FLOW_DISSECTOR_KEY_ENC_PORTS,
 212                                                   flow->key);
 213
 214                 if (mask_enc_ports->dst != cpu_to_be16(~0))
 215                         return -EOPNOTSUPP;
 216
 217                 if (dissector_uses_key(flow->dissector,
 218                                        FLOW_DISSECTOR_KEY_ENC_OPTS)) {
 219                         enc_op = skb_flow_dissector_target(flow->dissector,
 220                                                            FLOW_DISSECTOR_KEY_ENC_OPTS,
 221                                                            flow->key);
 222                 }
 223
 224                 switch (enc_ports->dst) {
 225                 case htons(NFP_FL_VXLAN_PORT):
 226                         *tun_type = NFP_FL_TUNNEL_VXLAN;
 227                         key_layer |= NFP_FLOWER_LAYER_VXLAN;
 228                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 229
 230                         if (enc_op)
 231                                 return -EOPNOTSUPP;
 232                         break;
 233                 case htons(NFP_FL_GENEVE_PORT):
 234                         if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE))
 235                                 return -EOPNOTSUPP;
 236                         *tun_type = NFP_FL_TUNNEL_GENEVE;
 237                         key_layer |= NFP_FLOWER_LAYER_EXT_META;
 238                         key_size += sizeof(struct nfp_flower_ext_meta);
 239                         key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
 240                         key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
 241
 242                         if (!enc_op)
 243                                 break;
 244                         if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT))
 245                                 return -EOPNOTSUPP;
 246                         err = nfp_flower_calc_opt_layer(enc_op, &key_layer_two,
 247                                                         &key_size);
 248                         if (err)
 249                                 return err;
 250                         break;
 251                 default:
 252                         return -EOPNOTSUPP;
 253                 }
 254         } else if (egress) {
 255                 /* Reject non tunnel matches offloaded to egress repr. */
 256                 return -EOPNOTSUPP;
 257         }
 258
 259         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 260                 mask_basic = skb_flow_dissector_target(flow->dissector,
 261                                                        FLOW_DISSECTOR_KEY_BASIC,
 262                                                        flow->mask);
 263
 264                 key_basic = skb_flow_dissector_target(flow->dissector,
 265                                                       FLOW_DISSECTOR_KEY_BASIC,
 266                                                       flow->key);
 267         }
 268
 269         if (mask_basic && mask_basic->n_proto) {
 270                 /* Ethernet type is present in the key. */
 271                 switch (key_basic->n_proto) {
 272                 case cpu_to_be16(ETH_P_IP):
 273                         key_layer |= NFP_FLOWER_LAYER_IPV4;
 274                         key_size += sizeof(struct nfp_flower_ipv4);
 275                         break;
 276
 277                 case cpu_to_be16(ETH_P_IPV6):
 278                         key_layer |= NFP_FLOWER_LAYER_IPV6;
 279                         key_size += sizeof(struct nfp_flower_ipv6);
 280                         break;
 281
 282                 /* Currently we do not offload ARP
 283                  * because we rely on it to get to the host.
 284                  */
 285                 case cpu_to_be16(ETH_P_ARP):
 286                         return -EOPNOTSUPP;
 287
 288                 case cpu_to_be16(ETH_P_MPLS_UC):
 289                 case cpu_to_be16(ETH_P_MPLS_MC):
 290                         if (!(key_layer & NFP_FLOWER_LAYER_MAC)) {
 291                                 key_layer |= NFP_FLOWER_LAYER_MAC;
 292                                 key_size += sizeof(struct nfp_flower_mac_mpls);
 293                         }
 294                         break;
 295
 296                 /* Will be included in layer 2. */
 297                 case cpu_to_be16(ETH_P_8021Q):
 298                         break;
 299
 300                 default:
 301                         /* Other ethtype - we need check the masks for the
 302                          * remainder of the key to ensure we can offload.
 303                          */
 304                         if (nfp_flower_check_higher_than_mac(flow))
 305                                 return -EOPNOTSUPP;
 306                         break;
 307                 }
 308         }
 309
 310         if (mask_basic && mask_basic->ip_proto) {
 311                 /* Ethernet type is present in the key. */
 312                 switch (key_basic->ip_proto) {
 313                 case IPPROTO_TCP:
 314                 case IPPROTO_UDP:
 315                 case IPPROTO_SCTP:
 316                 case IPPROTO_ICMP:
 317                 case IPPROTO_ICMPV6:
 318                         key_layer |= NFP_FLOWER_LAYER_TP;
 319                         key_size += sizeof(struct nfp_flower_tp_ports);
 320                         break;
 321                 default:
 322                         /* Other ip proto - we need check the masks for the
 323                          * remainder of the key to ensure we can offload.
 324                          */
 325                         return -EOPNOTSUPP;
 326                 }
 327         }
 328
 329         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) {
 330                 struct flow_dissector_key_tcp *tcp;
 331                 u32 tcp_flags;
 332
 333                 tcp = skb_flow_dissector_target(flow->dissector,
 334                                                 FLOW_DISSECTOR_KEY_TCP,
 335                                                 flow->key);
 336                 tcp_flags = be16_to_cpu(tcp->flags);
 337
 338                 if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS)
 339                         return -EOPNOTSUPP;
 340
 341                 /* We only support PSH and URG flags when either
 342                  * FIN, SYN or RST is present as well.
 343                  */
 344                 if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) &&
 345                     !(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST)))
 346                         return -EOPNOTSUPP;
 347
 348                 /* We need to store TCP flags in the IPv4 key space, thus
 349                  * we need to ensure we include a IPv4 key layer if we have
 350                  * not done so already.
 351                  */
 352                 if (!(key_layer & NFP_FLOWER_LAYER_IPV4)) {
 353                         key_layer |= NFP_FLOWER_LAYER_IPV4;
 354                         key_size += sizeof(struct nfp_flower_ipv4);
 355                 }
 356         }
 357
 358         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
 359                 struct flow_dissector_key_control *key_ctl;
 360
 361                 key_ctl = skb_flow_dissector_target(flow->dissector,
 362                                                     FLOW_DISSECTOR_KEY_CONTROL,
 363                                                     flow->key);
 364
 365                 if (key_ctl->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS)
 366                         return -EOPNOTSUPP;
 367         }
 368
 369         ret_key_ls->key_layer = key_layer;
 370         ret_key_ls->key_layer_two = key_layer_two;
 371         ret_key_ls->key_size = key_size;
 372
 373         return 0;
 374 }
 375
 376 static struct nfp_fl_payload *
 377 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer, bool egress)
 378 {
 379         struct nfp_fl_payload *flow_pay;
 380
 381         flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
 382         if (!flow_pay)
 383                 return NULL;
 384
 385         flow_pay->meta.key_len = key_layer->key_size;
 386         flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 387         if (!flow_pay->unmasked_data)
 388                 goto err_free_flow;
 389
 390         flow_pay->meta.mask_len = key_layer->key_size;
 391         flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
 392         if (!flow_pay->mask_data)
 393                 goto err_free_unmasked;
 394
 395         flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
 396         if (!flow_pay->action_data)
 397                 goto err_free_mask;
 398
 399         flow_pay->nfp_tun_ipv4_addr = 0;
 400         flow_pay->meta.flags = 0;
 401         flow_pay->ingress_offload = !egress;
 402
 403         return flow_pay;
 404
 405 err_free_mask:
 406         kfree(flow_pay->mask_data);
 407 err_free_unmasked:
 408         kfree(flow_pay->unmasked_data);
 409 err_free_flow:
 410         kfree(flow_pay);
 411         return NULL;
 412 }
 413
 414 /**
 415  * nfp_flower_add_offload() - Adds a new flow to hardware.
 416  * @app:        Pointer to the APP handle
 417  * @netdev:     netdev structure.
 418  * @flow:       TC flower classifier offload structure.
 419  * @egress:     NFP netdev is the egress.
 420  *
 421  * Adds a new flow to the repeated hash structure and action payload.
 422  *
 423  * Return: negative value on error, 0 if configured successfully.
 424  */
 425 static int
 426 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 427                        struct tc_cls_flower_offload *flow, bool egress)
 428 {
 429         enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
 430         struct nfp_port *port = nfp_port_from_netdev(netdev);
 431         struct nfp_flower_priv *priv = app->priv;
 432         struct nfp_fl_payload *flow_pay;
 433         struct nfp_fl_key_ls *key_layer;
 434         struct net_device *ingr_dev;
 435         int err;
 436
 437         ingr_dev = egress ? NULL : netdev;
 438         flow_pay = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev,
 439                                               NFP_FL_STATS_CTX_DONT_CARE);
 440         if (flow_pay) {
 441                 /* Ignore as duplicate if it has been added by different cb. */
 442                 if (flow_pay->ingress_offload && egress)
 443                         return 0;
 444                 else
 445                         return -EOPNOTSUPP;
 446         }
 447
 448         key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
 449         if (!key_layer)
 450                 return -ENOMEM;
 451
 452         err = nfp_flower_calculate_key_layers(app, key_layer, flow, egress,
 453                                               &tun_type);
 454         if (err)
 455                 goto err_free_key_ls;
 456
 457         flow_pay = nfp_flower_allocate_new(key_layer, egress);
 458         if (!flow_pay) {
 459                 err = -ENOMEM;
 460                 goto err_free_key_ls;
 461         }
 462
 463         flow_pay->ingress_dev = egress ? NULL : netdev;
 464
 465         err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay,
 466                                             tun_type);
 467         if (err)
 468                 goto err_destroy_flow;
 469
 470         err = nfp_flower_compile_action(app, flow, netdev, flow_pay);
 471         if (err)
 472                 goto err_destroy_flow;
 473
 474         err = nfp_compile_flow_metadata(app, flow, flow_pay,
 475                                         flow_pay->ingress_dev);
 476         if (err)
 477                 goto err_destroy_flow;
 478
 479         err = nfp_flower_xmit_flow(netdev, flow_pay,
 480                                    NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
 481         if (err)
 482                 goto err_destroy_flow;
 483
 484         flow_pay->tc_flower_cookie = flow->cookie;
 485         err = rhashtable_insert_fast(&priv->flow_table, &flow_pay->fl_node,
 486                                      nfp_flower_table_params);
 487         if (err)
 488                 goto err_destroy_flow;
 489
 490         port->tc_offload_cnt++;
 491
 492         /* Deallocate flow payload when flower rule has been destroyed. */
 493         kfree(key_layer);
 494
 495         return 0;
 496
 497 err_destroy_flow:
 498         kfree(flow_pay->action_data);
 499         kfree(flow_pay->mask_data);
 500         kfree(flow_pay->unmasked_data);
 501         kfree(flow_pay);
 502 err_free_key_ls:
 503         kfree(key_layer);
 504         return err;
 505 }
 506
 507 /**
 508  * nfp_flower_del_offload() - Removes a flow from hardware.
 509  * @app:        Pointer to the APP handle
 510  * @netdev:     netdev structure.
 511  * @flow:       TC flower classifier offload structure
 512  * @egress:     Netdev is the egress dev.
 513  *
 514  * Removes a flow from the repeated hash structure and clears the
 515  * action payload.
 516  *
 517  * Return: negative value on error, 0 if removed successfully.
 518  */
 519 static int
 520 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
 521                        struct tc_cls_flower_offload *flow, bool egress)
 522 {
 523         struct nfp_port *port = nfp_port_from_netdev(netdev);
 524         struct nfp_flower_priv *priv = app->priv;
 525         struct nfp_fl_payload *nfp_flow;
 526         struct net_device *ingr_dev;
 527         int err;
 528
 529         ingr_dev = egress ? NULL : netdev;
 530         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev,
 531                                               NFP_FL_STATS_CTX_DONT_CARE);
 532         if (!nfp_flow)
 533                 return egress ? 0 : -ENOENT;
 534
 535         err = nfp_modify_flow_metadata(app, nfp_flow);
 536         if (err)
 537                 goto err_free_flow;
 538
 539         if (nfp_flow->nfp_tun_ipv4_addr)
 540                 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
 541
 542         err = nfp_flower_xmit_flow(netdev, nfp_flow,
 543                                    NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
 544         if (err)
 545                 goto err_free_flow;
 546
 547 err_free_flow:
 548         port->tc_offload_cnt--;
 549         kfree(nfp_flow->action_data);
 550         kfree(nfp_flow->mask_data);
 551         kfree(nfp_flow->unmasked_data);
 552         WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
 553                                             &nfp_flow->fl_node,
 554                                             nfp_flower_table_params));
 555         kfree_rcu(nfp_flow, rcu);
 556         return err;
 557 }
 558
 559 /**
 560  * nfp_flower_get_stats() - Populates flow stats obtained from hardware.
 561  * @app:        Pointer to the APP handle
 562  * @netdev:     Netdev structure.
 563  * @flow:       TC flower classifier offload structure
 564  * @egress:     Netdev is the egress dev.
 565  *
 566  * Populates a flow statistics structure which which corresponds to a
 567  * specific flow.
 568  *
 569  * Return: negative value on error, 0 if stats populated successfully.
 570  */
 571 static int
 572 nfp_flower_get_stats(struct nfp_app *app, struct net_device *netdev,
 573                      struct tc_cls_flower_offload *flow, bool egress)
 574 {
 575         struct nfp_flower_priv *priv = app->priv;
 576         struct nfp_fl_payload *nfp_flow;
 577         struct net_device *ingr_dev;
 578         u32 ctx_id;
 579
 580         ingr_dev = egress ? NULL : netdev;
 581         nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev,
 582                                               NFP_FL_STATS_CTX_DONT_CARE);
 583         if (!nfp_flow)
 584                 return -EINVAL;
 585
 586         if (nfp_flow->ingress_offload && egress)
 587                 return 0;
 588
 589         ctx_id = be32_to_cpu(nfp_flow->meta.host_ctx_id);
 590
 591         spin_lock_bh(&priv->stats_lock);
 592         tcf_exts_stats_update(flow->exts, priv->stats[ctx_id].bytes,
 593                               priv->stats[ctx_id].pkts,
 594                               priv->stats[ctx_id].used);
 595
 596         priv->stats[ctx_id].pkts = 0;
 597         priv->stats[ctx_id].bytes = 0;
 598         spin_unlock_bh(&priv->stats_lock);
 599
 600         return 0;
 601 }
 602
 603 static int
 604 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
 605                         struct tc_cls_flower_offload *flower, bool egress)
 606 {
 607         if (!eth_proto_is_802_3(flower->common.protocol))
 608                 return -EOPNOTSUPP;
 609
 610         switch (flower->command) {
 611         case TC_CLSFLOWER_REPLACE:
 612                 return nfp_flower_add_offload(app, netdev, flower, egress);
 613         case TC_CLSFLOWER_DESTROY:
 614                 return nfp_flower_del_offload(app, netdev, flower, egress);
 615         case TC_CLSFLOWER_STATS:
 616                 return nfp_flower_get_stats(app, netdev, flower, egress);
 617         default:
 618                 return -EOPNOTSUPP;
 619         }
 620 }
 621
 622 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data,
 623                                   void *cb_priv)
 624 {
 625         struct nfp_repr *repr = cb_priv;
 626
 627         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 628                 return -EOPNOTSUPP;
 629
 630         switch (type) {
 631         case TC_SETUP_CLSFLOWER:
 632                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 633                                                type_data, true);
 634         default:
 635                 return -EOPNOTSUPP;
 636         }
 637 }
 638
 639 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
 640                                         void *type_data, void *cb_priv)
 641 {
 642         struct nfp_repr *repr = cb_priv;
 643
 644         if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
 645                 return -EOPNOTSUPP;
 646
 647         switch (type) {
 648         case TC_SETUP_CLSFLOWER:
 649                 return nfp_flower_repr_offload(repr->app, repr->netdev,
 650                                                type_data, false);
 651         default:
 652                 return -EOPNOTSUPP;
 653         }
 654 }
 655
 656 static int nfp_flower_setup_tc_block(struct net_device *netdev,
 657                                      struct tc_block_offload *f)
 658 {
 659         struct nfp_repr *repr = netdev_priv(netdev);
 660
 661         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 662                 return -EOPNOTSUPP;
 663
 664         switch (f->command) {
 665         case TC_BLOCK_BIND:
 666                 return tcf_block_cb_register(f->block,
 667                                              nfp_flower_setup_tc_block_cb,
 668                                              repr, repr, f->extack);
 669         case TC_BLOCK_UNBIND:
 670                 tcf_block_cb_unregister(f->block,
 671                                         nfp_flower_setup_tc_block_cb,
 672                                         repr);
 673                 return 0;
 674         default:
 675                 return -EOPNOTSUPP;
 676         }
 677 }
 678
 679 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
 680                         enum tc_setup_type type, void *type_data)
 681 {
 682         switch (type) {
 683         case TC_SETUP_BLOCK:
 684                 return nfp_flower_setup_tc_block(netdev, type_data);
 685         default:
 686                 return -EOPNOTSUPP;
 687         }
 688 }