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 nfp_app *app, struct nfp_fl_payload *nfp_flow, 60 u8 mtype) 61 { 62 u32 meta_len, key_len, mask_len, act_len, tot_len; 63 struct sk_buff *skb; 64 unsigned char *msg; 65 66 meta_len = sizeof(struct nfp_fl_rule_metadata); 67 key_len = nfp_flow->meta.key_len; 68 mask_len = nfp_flow->meta.mask_len; 69 act_len = nfp_flow->meta.act_len; 70 71 tot_len = meta_len + key_len + mask_len + act_len; 72 73 /* Convert to long words as firmware expects 74 * lengths in units of NFP_FL_LW_SIZ. 75 */ 76 nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ; 77 nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ; 78 nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ; 79 80 skb = nfp_flower_cmsg_alloc(app, tot_len, mtype, GFP_KERNEL); 81 if (!skb) 82 return -ENOMEM; 83 84 msg = nfp_flower_cmsg_get_data(skb); 85 memcpy(msg, &nfp_flow->meta, meta_len); 86 memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len); 87 memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len); 88 memcpy(&msg[meta_len + key_len + mask_len], 89 nfp_flow->action_data, act_len); 90 91 /* Convert back to bytes as software expects 92 * lengths in units of bytes. 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 nfp_ctrl_tx(app->ctrl, skb); 99 100 return 0; 101 } 102 103 static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f) 104 { 105 return dissector_uses_key(f->dissector, 106 FLOW_DISSECTOR_KEY_IPV4_ADDRS) || 107 dissector_uses_key(f->dissector, 108 FLOW_DISSECTOR_KEY_IPV6_ADDRS) || 109 dissector_uses_key(f->dissector, 110 FLOW_DISSECTOR_KEY_PORTS) || 111 dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP); 112 } 113 114 static int 115 nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts, 116 u32 *key_layer_two, int *key_size) 117 { 118 if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY) 119 return -EOPNOTSUPP; 120 121 if (enc_opts->len > 0) { 122 *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP; 123 *key_size += sizeof(struct nfp_flower_geneve_options); 124 } 125 126 return 0; 127 } 128 129 static int 130 nfp_flower_calculate_key_layers(struct nfp_app *app, 131 struct net_device *netdev, 132 struct nfp_fl_key_ls *ret_key_ls, 133 struct tc_cls_flower_offload *flow, 134 enum nfp_flower_tun_type *tun_type) 135 { 136 struct flow_dissector_key_basic *mask_basic = NULL; 137 struct flow_dissector_key_basic *key_basic = NULL; 138 struct nfp_flower_priv *priv = app->priv; 139 u32 key_layer_two; 140 u8 key_layer; 141 int key_size; 142 int err; 143 144 if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR) 145 return -EOPNOTSUPP; 146 147 /* If any tun dissector is used then the required set must be used. */ 148 if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR && 149 (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) 150 != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) 151 return -EOPNOTSUPP; 152 153 key_layer_two = 0; 154 key_layer = NFP_FLOWER_LAYER_PORT; 155 key_size = sizeof(struct nfp_flower_meta_tci) + 156 sizeof(struct nfp_flower_in_port); 157 158 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) || 159 dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) { 160 key_layer |= NFP_FLOWER_LAYER_MAC; 161 key_size += sizeof(struct nfp_flower_mac_mpls); 162 } 163 164 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) { 165 struct flow_dissector_key_vlan *flow_vlan; 166 167 flow_vlan = skb_flow_dissector_target(flow->dissector, 168 FLOW_DISSECTOR_KEY_VLAN, 169 flow->mask); 170 if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_PCP) && 171 flow_vlan->vlan_priority) 172 return -EOPNOTSUPP; 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_enc_opts *enc_op = NULL; 180 struct flow_dissector_key_ports *enc_ports = NULL; 181 struct flow_dissector_key_control *mask_enc_ctl = 182 skb_flow_dissector_target(flow->dissector, 183 FLOW_DISSECTOR_KEY_ENC_CONTROL, 184 flow->mask); 185 struct flow_dissector_key_control *enc_ctl = 186 skb_flow_dissector_target(flow->dissector, 187 FLOW_DISSECTOR_KEY_ENC_CONTROL, 188 flow->key); 189 190 if (mask_enc_ctl->addr_type != 0xffff || 191 enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS) 192 return -EOPNOTSUPP; 193 194 /* These fields are already verified as used. */ 195 mask_ipv4 = 196 skb_flow_dissector_target(flow->dissector, 197 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, 198 flow->mask); 199 if (mask_ipv4->dst != cpu_to_be32(~0)) 200 return -EOPNOTSUPP; 201 202 mask_enc_ports = 203 skb_flow_dissector_target(flow->dissector, 204 FLOW_DISSECTOR_KEY_ENC_PORTS, 205 flow->mask); 206 enc_ports = 207 skb_flow_dissector_target(flow->dissector, 208 FLOW_DISSECTOR_KEY_ENC_PORTS, 209 flow->key); 210 211 if (mask_enc_ports->dst != cpu_to_be16(~0)) 212 return -EOPNOTSUPP; 213 214 if (dissector_uses_key(flow->dissector, 215 FLOW_DISSECTOR_KEY_ENC_OPTS)) { 216 enc_op = skb_flow_dissector_target(flow->dissector, 217 FLOW_DISSECTOR_KEY_ENC_OPTS, 218 flow->key); 219 } 220 221 switch (enc_ports->dst) { 222 case htons(NFP_FL_VXLAN_PORT): 223 *tun_type = NFP_FL_TUNNEL_VXLAN; 224 key_layer |= NFP_FLOWER_LAYER_VXLAN; 225 key_size += sizeof(struct nfp_flower_ipv4_udp_tun); 226 227 if (enc_op) 228 return -EOPNOTSUPP; 229 break; 230 case htons(NFP_FL_GENEVE_PORT): 231 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) 232 return -EOPNOTSUPP; 233 *tun_type = NFP_FL_TUNNEL_GENEVE; 234 key_layer |= NFP_FLOWER_LAYER_EXT_META; 235 key_size += sizeof(struct nfp_flower_ext_meta); 236 key_layer_two |= NFP_FLOWER_LAYER2_GENEVE; 237 key_size += sizeof(struct nfp_flower_ipv4_udp_tun); 238 239 if (!enc_op) 240 break; 241 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)) 242 return -EOPNOTSUPP; 243 err = nfp_flower_calc_opt_layer(enc_op, &key_layer_two, 244 &key_size); 245 if (err) 246 return err; 247 break; 248 default: 249 return -EOPNOTSUPP; 250 } 251 252 /* Ensure the ingress netdev matches the expected tun type. */ 253 if (!nfp_fl_netdev_is_tunnel_type(netdev, *tun_type)) 254 return -EOPNOTSUPP; 255 } 256 257 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 258 mask_basic = skb_flow_dissector_target(flow->dissector, 259 FLOW_DISSECTOR_KEY_BASIC, 260 flow->mask); 261 262 key_basic = skb_flow_dissector_target(flow->dissector, 263 FLOW_DISSECTOR_KEY_BASIC, 264 flow->key); 265 } 266 267 if (mask_basic && mask_basic->n_proto) { 268 /* Ethernet type is present in the key. */ 269 switch (key_basic->n_proto) { 270 case cpu_to_be16(ETH_P_IP): 271 key_layer |= NFP_FLOWER_LAYER_IPV4; 272 key_size += sizeof(struct nfp_flower_ipv4); 273 break; 274 275 case cpu_to_be16(ETH_P_IPV6): 276 key_layer |= NFP_FLOWER_LAYER_IPV6; 277 key_size += sizeof(struct nfp_flower_ipv6); 278 break; 279 280 /* Currently we do not offload ARP 281 * because we rely on it to get to the host. 282 */ 283 case cpu_to_be16(ETH_P_ARP): 284 return -EOPNOTSUPP; 285 286 case cpu_to_be16(ETH_P_MPLS_UC): 287 case cpu_to_be16(ETH_P_MPLS_MC): 288 if (!(key_layer & NFP_FLOWER_LAYER_MAC)) { 289 key_layer |= NFP_FLOWER_LAYER_MAC; 290 key_size += sizeof(struct nfp_flower_mac_mpls); 291 } 292 break; 293 294 /* Will be included in layer 2. */ 295 case cpu_to_be16(ETH_P_8021Q): 296 break; 297 298 default: 299 /* Other ethtype - we need check the masks for the 300 * remainder of the key to ensure we can offload. 301 */ 302 if (nfp_flower_check_higher_than_mac(flow)) 303 return -EOPNOTSUPP; 304 break; 305 } 306 } 307 308 if (mask_basic && mask_basic->ip_proto) { 309 /* Ethernet type is present in the key. */ 310 switch (key_basic->ip_proto) { 311 case IPPROTO_TCP: 312 case IPPROTO_UDP: 313 case IPPROTO_SCTP: 314 case IPPROTO_ICMP: 315 case IPPROTO_ICMPV6: 316 key_layer |= NFP_FLOWER_LAYER_TP; 317 key_size += sizeof(struct nfp_flower_tp_ports); 318 break; 319 default: 320 /* Other ip proto - we need check the masks for the 321 * remainder of the key to ensure we can offload. 322 */ 323 return -EOPNOTSUPP; 324 } 325 } 326 327 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) { 328 struct flow_dissector_key_tcp *tcp; 329 u32 tcp_flags; 330 331 tcp = skb_flow_dissector_target(flow->dissector, 332 FLOW_DISSECTOR_KEY_TCP, 333 flow->key); 334 tcp_flags = be16_to_cpu(tcp->flags); 335 336 if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS) 337 return -EOPNOTSUPP; 338 339 /* We only support PSH and URG flags when either 340 * FIN, SYN or RST is present as well. 341 */ 342 if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) && 343 !(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST))) 344 return -EOPNOTSUPP; 345 346 /* We need to store TCP flags in the IPv4 key space, thus 347 * we need to ensure we include a IPv4 key layer if we have 348 * not done so already. 349 */ 350 if (!(key_layer & NFP_FLOWER_LAYER_IPV4)) { 351 key_layer |= NFP_FLOWER_LAYER_IPV4; 352 key_size += sizeof(struct nfp_flower_ipv4); 353 } 354 } 355 356 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { 357 struct flow_dissector_key_control *key_ctl; 358 359 key_ctl = skb_flow_dissector_target(flow->dissector, 360 FLOW_DISSECTOR_KEY_CONTROL, 361 flow->key); 362 363 if (key_ctl->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS) 364 return -EOPNOTSUPP; 365 } 366 367 ret_key_ls->key_layer = key_layer; 368 ret_key_ls->key_layer_two = key_layer_two; 369 ret_key_ls->key_size = key_size; 370 371 return 0; 372 } 373 374 static struct nfp_fl_payload * 375 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer) 376 { 377 struct nfp_fl_payload *flow_pay; 378 379 flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL); 380 if (!flow_pay) 381 return NULL; 382 383 flow_pay->meta.key_len = key_layer->key_size; 384 flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL); 385 if (!flow_pay->unmasked_data) 386 goto err_free_flow; 387 388 flow_pay->meta.mask_len = key_layer->key_size; 389 flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL); 390 if (!flow_pay->mask_data) 391 goto err_free_unmasked; 392 393 flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL); 394 if (!flow_pay->action_data) 395 goto err_free_mask; 396 397 flow_pay->nfp_tun_ipv4_addr = 0; 398 flow_pay->meta.flags = 0; 399 400 return flow_pay; 401 402 err_free_mask: 403 kfree(flow_pay->mask_data); 404 err_free_unmasked: 405 kfree(flow_pay->unmasked_data); 406 err_free_flow: 407 kfree(flow_pay); 408 return NULL; 409 } 410 411 /** 412 * nfp_flower_add_offload() - Adds a new flow to hardware. 413 * @app: Pointer to the APP handle 414 * @netdev: netdev structure. 415 * @flow: TC flower classifier offload structure. 416 * 417 * Adds a new flow to the repeated hash structure and action payload. 418 * 419 * Return: negative value on error, 0 if configured successfully. 420 */ 421 static int 422 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev, 423 struct tc_cls_flower_offload *flow) 424 { 425 enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE; 426 struct nfp_flower_priv *priv = app->priv; 427 struct nfp_fl_payload *flow_pay; 428 struct nfp_fl_key_ls *key_layer; 429 struct nfp_port *port = NULL; 430 int err; 431 432 if (nfp_netdev_is_nfp_repr(netdev)) 433 port = nfp_port_from_netdev(netdev); 434 435 key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL); 436 if (!key_layer) 437 return -ENOMEM; 438 439 err = nfp_flower_calculate_key_layers(app, netdev, key_layer, flow, 440 &tun_type); 441 if (err) 442 goto err_free_key_ls; 443 444 flow_pay = nfp_flower_allocate_new(key_layer); 445 if (!flow_pay) { 446 err = -ENOMEM; 447 goto err_free_key_ls; 448 } 449 450 err = nfp_flower_compile_flow_match(app, flow, key_layer, netdev, 451 flow_pay, tun_type); 452 if (err) 453 goto err_destroy_flow; 454 455 err = nfp_flower_compile_action(app, flow, netdev, flow_pay); 456 if (err) 457 goto err_destroy_flow; 458 459 err = nfp_compile_flow_metadata(app, flow, flow_pay, netdev); 460 if (err) 461 goto err_destroy_flow; 462 463 err = nfp_flower_xmit_flow(app, flow_pay, 464 NFP_FLOWER_CMSG_TYPE_FLOW_ADD); 465 if (err) 466 goto err_destroy_flow; 467 468 flow_pay->tc_flower_cookie = flow->cookie; 469 err = rhashtable_insert_fast(&priv->flow_table, &flow_pay->fl_node, 470 nfp_flower_table_params); 471 if (err) 472 goto err_destroy_flow; 473 474 if (port) 475 port->tc_offload_cnt++; 476 477 /* Deallocate flow payload when flower rule has been destroyed. */ 478 kfree(key_layer); 479 480 return 0; 481 482 err_destroy_flow: 483 kfree(flow_pay->action_data); 484 kfree(flow_pay->mask_data); 485 kfree(flow_pay->unmasked_data); 486 kfree(flow_pay); 487 err_free_key_ls: 488 kfree(key_layer); 489 return err; 490 } 491 492 /** 493 * nfp_flower_del_offload() - Removes a flow from hardware. 494 * @app: Pointer to the APP handle 495 * @netdev: netdev structure. 496 * @flow: TC flower classifier offload structure 497 * 498 * Removes a flow from the repeated hash structure and clears the 499 * action payload. 500 * 501 * Return: negative value on error, 0 if removed successfully. 502 */ 503 static int 504 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev, 505 struct tc_cls_flower_offload *flow) 506 { 507 struct nfp_flower_priv *priv = app->priv; 508 struct nfp_fl_payload *nfp_flow; 509 struct nfp_port *port = NULL; 510 int err; 511 512 if (nfp_netdev_is_nfp_repr(netdev)) 513 port = nfp_port_from_netdev(netdev); 514 515 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev); 516 if (!nfp_flow) 517 return -ENOENT; 518 519 err = nfp_modify_flow_metadata(app, nfp_flow); 520 if (err) 521 goto err_free_flow; 522 523 if (nfp_flow->nfp_tun_ipv4_addr) 524 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr); 525 526 err = nfp_flower_xmit_flow(app, nfp_flow, 527 NFP_FLOWER_CMSG_TYPE_FLOW_DEL); 528 if (err) 529 goto err_free_flow; 530 531 err_free_flow: 532 if (port) 533 port->tc_offload_cnt--; 534 kfree(nfp_flow->action_data); 535 kfree(nfp_flow->mask_data); 536 kfree(nfp_flow->unmasked_data); 537 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table, 538 &nfp_flow->fl_node, 539 nfp_flower_table_params)); 540 kfree_rcu(nfp_flow, rcu); 541 return err; 542 } 543 544 /** 545 * nfp_flower_get_stats() - Populates flow stats obtained from hardware. 546 * @app: Pointer to the APP handle 547 * @netdev: Netdev structure. 548 * @flow: TC flower classifier offload structure 549 * 550 * Populates a flow statistics structure which which corresponds to a 551 * specific flow. 552 * 553 * Return: negative value on error, 0 if stats populated successfully. 554 */ 555 static int 556 nfp_flower_get_stats(struct nfp_app *app, struct net_device *netdev, 557 struct tc_cls_flower_offload *flow) 558 { 559 struct nfp_flower_priv *priv = app->priv; 560 struct nfp_fl_payload *nfp_flow; 561 u32 ctx_id; 562 563 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev); 564 if (!nfp_flow) 565 return -EINVAL; 566 567 ctx_id = be32_to_cpu(nfp_flow->meta.host_ctx_id); 568 569 spin_lock_bh(&priv->stats_lock); 570 tcf_exts_stats_update(flow->exts, priv->stats[ctx_id].bytes, 571 priv->stats[ctx_id].pkts, 572 priv->stats[ctx_id].used); 573 574 priv->stats[ctx_id].pkts = 0; 575 priv->stats[ctx_id].bytes = 0; 576 spin_unlock_bh(&priv->stats_lock); 577 578 return 0; 579 } 580 581 static int 582 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev, 583 struct tc_cls_flower_offload *flower) 584 { 585 if (!eth_proto_is_802_3(flower->common.protocol)) 586 return -EOPNOTSUPP; 587 588 switch (flower->command) { 589 case TC_CLSFLOWER_REPLACE: 590 return nfp_flower_add_offload(app, netdev, flower); 591 case TC_CLSFLOWER_DESTROY: 592 return nfp_flower_del_offload(app, netdev, flower); 593 case TC_CLSFLOWER_STATS: 594 return nfp_flower_get_stats(app, netdev, flower); 595 default: 596 return -EOPNOTSUPP; 597 } 598 } 599 600 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type, 601 void *type_data, void *cb_priv) 602 { 603 struct nfp_repr *repr = cb_priv; 604 605 if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data)) 606 return -EOPNOTSUPP; 607 608 switch (type) { 609 case TC_SETUP_CLSFLOWER: 610 return nfp_flower_repr_offload(repr->app, repr->netdev, 611 type_data); 612 default: 613 return -EOPNOTSUPP; 614 } 615 } 616 617 static int nfp_flower_setup_tc_block(struct net_device *netdev, 618 struct tc_block_offload *f) 619 { 620 struct nfp_repr *repr = netdev_priv(netdev); 621 622 if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 623 return -EOPNOTSUPP; 624 625 switch (f->command) { 626 case TC_BLOCK_BIND: 627 return tcf_block_cb_register(f->block, 628 nfp_flower_setup_tc_block_cb, 629 repr, repr, f->extack); 630 case TC_BLOCK_UNBIND: 631 tcf_block_cb_unregister(f->block, 632 nfp_flower_setup_tc_block_cb, 633 repr); 634 return 0; 635 default: 636 return -EOPNOTSUPP; 637 } 638 } 639 640 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 641 enum tc_setup_type type, void *type_data) 642 { 643 switch (type) { 644 case TC_SETUP_BLOCK: 645 return nfp_flower_setup_tc_block(netdev, type_data); 646 default: 647 return -EOPNOTSUPP; 648 } 649 } 650 651 struct nfp_flower_indr_block_cb_priv { 652 struct net_device *netdev; 653 struct nfp_app *app; 654 struct list_head list; 655 }; 656 657 static struct nfp_flower_indr_block_cb_priv * 658 nfp_flower_indr_block_cb_priv_lookup(struct nfp_app *app, 659 struct net_device *netdev) 660 { 661 struct nfp_flower_indr_block_cb_priv *cb_priv; 662 struct nfp_flower_priv *priv = app->priv; 663 664 /* All callback list access should be protected by RTNL. */ 665 ASSERT_RTNL(); 666 667 list_for_each_entry(cb_priv, &priv->indr_block_cb_priv, list) 668 if (cb_priv->netdev == netdev) 669 return cb_priv; 670 671 return NULL; 672 } 673 674 static int nfp_flower_setup_indr_block_cb(enum tc_setup_type type, 675 void *type_data, void *cb_priv) 676 { 677 struct nfp_flower_indr_block_cb_priv *priv = cb_priv; 678 struct tc_cls_flower_offload *flower = type_data; 679 680 if (flower->common.chain_index) 681 return -EOPNOTSUPP; 682 683 switch (type) { 684 case TC_SETUP_CLSFLOWER: 685 return nfp_flower_repr_offload(priv->app, priv->netdev, 686 type_data); 687 default: 688 return -EOPNOTSUPP; 689 } 690 } 691 692 static int 693 nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct nfp_app *app, 694 struct tc_block_offload *f) 695 { 696 struct nfp_flower_indr_block_cb_priv *cb_priv; 697 struct nfp_flower_priv *priv = app->priv; 698 int err; 699 700 if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 701 return -EOPNOTSUPP; 702 703 switch (f->command) { 704 case TC_BLOCK_BIND: 705 cb_priv = kmalloc(sizeof(*cb_priv), GFP_KERNEL); 706 if (!cb_priv) 707 return -ENOMEM; 708 709 cb_priv->netdev = netdev; 710 cb_priv->app = app; 711 list_add(&cb_priv->list, &priv->indr_block_cb_priv); 712 713 err = tcf_block_cb_register(f->block, 714 nfp_flower_setup_indr_block_cb, 715 netdev, cb_priv, f->extack); 716 if (err) { 717 list_del(&cb_priv->list); 718 kfree(cb_priv); 719 } 720 721 return err; 722 case TC_BLOCK_UNBIND: 723 tcf_block_cb_unregister(f->block, 724 nfp_flower_setup_indr_block_cb, netdev); 725 cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev); 726 if (cb_priv) { 727 list_del(&cb_priv->list); 728 kfree(cb_priv); 729 } 730 731 return 0; 732 default: 733 return -EOPNOTSUPP; 734 } 735 return 0; 736 } 737 738 static int 739 nfp_flower_indr_setup_tc_cb(struct net_device *netdev, void *cb_priv, 740 enum tc_setup_type type, void *type_data) 741 { 742 switch (type) { 743 case TC_SETUP_BLOCK: 744 return nfp_flower_setup_indr_tc_block(netdev, cb_priv, 745 type_data); 746 default: 747 return -EOPNOTSUPP; 748 } 749 } 750 751 int nfp_flower_reg_indir_block_handler(struct nfp_app *app, 752 struct net_device *netdev, 753 unsigned long event) 754 { 755 int err; 756 757 if (!nfp_fl_is_netdev_to_offload(netdev)) 758 return NOTIFY_OK; 759 760 if (event == NETDEV_REGISTER) { 761 err = __tc_indr_block_cb_register(netdev, app, 762 nfp_flower_indr_setup_tc_cb, 763 netdev); 764 if (err) 765 nfp_flower_cmsg_warn(app, 766 "Indirect block reg failed - %s\n", 767 netdev->name); 768 } else if (event == NETDEV_UNREGISTER) { 769 __tc_indr_block_cb_unregister(netdev, 770 nfp_flower_indr_setup_tc_cb, 771 netdev); 772 } 773 774 return NOTIFY_OK; 775 } 776