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_ENC_OPTS) | \ 70 BIT(FLOW_DISSECTOR_KEY_ENC_IP) | \ 71 BIT(FLOW_DISSECTOR_KEY_MPLS) | \ 72 BIT(FLOW_DISSECTOR_KEY_IP)) 73 74 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \ 75 (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \ 76 BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \ 77 BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \ 78 BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \ 79 BIT(FLOW_DISSECTOR_KEY_ENC_OPTS) | \ 80 BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \ 81 BIT(FLOW_DISSECTOR_KEY_ENC_IP)) 82 83 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \ 84 (BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \ 85 BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \ 86 BIT(FLOW_DISSECTOR_KEY_ENC_PORTS)) 87 88 static int 89 nfp_flower_xmit_flow(struct net_device *netdev, 90 struct nfp_fl_payload *nfp_flow, u8 mtype) 91 { 92 u32 meta_len, key_len, mask_len, act_len, tot_len; 93 struct nfp_repr *priv = netdev_priv(netdev); 94 struct sk_buff *skb; 95 unsigned char *msg; 96 97 meta_len = sizeof(struct nfp_fl_rule_metadata); 98 key_len = nfp_flow->meta.key_len; 99 mask_len = nfp_flow->meta.mask_len; 100 act_len = nfp_flow->meta.act_len; 101 102 tot_len = meta_len + key_len + mask_len + act_len; 103 104 /* Convert to long words as firmware expects 105 * lengths in units of NFP_FL_LW_SIZ. 106 */ 107 nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ; 108 nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ; 109 nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ; 110 111 skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype, GFP_KERNEL); 112 if (!skb) 113 return -ENOMEM; 114 115 msg = nfp_flower_cmsg_get_data(skb); 116 memcpy(msg, &nfp_flow->meta, meta_len); 117 memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len); 118 memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len); 119 memcpy(&msg[meta_len + key_len + mask_len], 120 nfp_flow->action_data, act_len); 121 122 /* Convert back to bytes as software expects 123 * lengths in units of bytes. 124 */ 125 nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ; 126 nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ; 127 nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ; 128 129 nfp_ctrl_tx(priv->app->ctrl, skb); 130 131 return 0; 132 } 133 134 static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f) 135 { 136 return dissector_uses_key(f->dissector, 137 FLOW_DISSECTOR_KEY_IPV4_ADDRS) || 138 dissector_uses_key(f->dissector, 139 FLOW_DISSECTOR_KEY_IPV6_ADDRS) || 140 dissector_uses_key(f->dissector, 141 FLOW_DISSECTOR_KEY_PORTS) || 142 dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP); 143 } 144 145 static int 146 nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts, 147 u32 *key_layer_two, int *key_size) 148 { 149 if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY) 150 return -EOPNOTSUPP; 151 152 if (enc_opts->len > 0) { 153 *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP; 154 *key_size += sizeof(struct nfp_flower_geneve_options); 155 } 156 157 return 0; 158 } 159 160 static int 161 nfp_flower_calculate_key_layers(struct nfp_app *app, 162 struct nfp_fl_key_ls *ret_key_ls, 163 struct tc_cls_flower_offload *flow, 164 bool egress, 165 enum nfp_flower_tun_type *tun_type) 166 { 167 struct flow_dissector_key_basic *mask_basic = NULL; 168 struct flow_dissector_key_basic *key_basic = NULL; 169 struct nfp_flower_priv *priv = app->priv; 170 u32 key_layer_two; 171 u8 key_layer; 172 int key_size; 173 int err; 174 175 if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR) 176 return -EOPNOTSUPP; 177 178 /* If any tun dissector is used then the required set must be used. */ 179 if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR && 180 (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) 181 != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) 182 return -EOPNOTSUPP; 183 184 key_layer_two = 0; 185 key_layer = NFP_FLOWER_LAYER_PORT; 186 key_size = sizeof(struct nfp_flower_meta_tci) + 187 sizeof(struct nfp_flower_in_port); 188 189 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) || 190 dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) { 191 key_layer |= NFP_FLOWER_LAYER_MAC; 192 key_size += sizeof(struct nfp_flower_mac_mpls); 193 } 194 195 if (dissector_uses_key(flow->dissector, 196 FLOW_DISSECTOR_KEY_ENC_CONTROL)) { 197 struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL; 198 struct flow_dissector_key_ports *mask_enc_ports = NULL; 199 struct flow_dissector_key_enc_opts *enc_op = NULL; 200 struct flow_dissector_key_ports *enc_ports = NULL; 201 struct flow_dissector_key_control *mask_enc_ctl = 202 skb_flow_dissector_target(flow->dissector, 203 FLOW_DISSECTOR_KEY_ENC_CONTROL, 204 flow->mask); 205 struct flow_dissector_key_control *enc_ctl = 206 skb_flow_dissector_target(flow->dissector, 207 FLOW_DISSECTOR_KEY_ENC_CONTROL, 208 flow->key); 209 if (!egress) 210 return -EOPNOTSUPP; 211 212 if (mask_enc_ctl->addr_type != 0xffff || 213 enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS) 214 return -EOPNOTSUPP; 215 216 /* These fields are already verified as used. */ 217 mask_ipv4 = 218 skb_flow_dissector_target(flow->dissector, 219 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, 220 flow->mask); 221 if (mask_ipv4->dst != cpu_to_be32(~0)) 222 return -EOPNOTSUPP; 223 224 mask_enc_ports = 225 skb_flow_dissector_target(flow->dissector, 226 FLOW_DISSECTOR_KEY_ENC_PORTS, 227 flow->mask); 228 enc_ports = 229 skb_flow_dissector_target(flow->dissector, 230 FLOW_DISSECTOR_KEY_ENC_PORTS, 231 flow->key); 232 233 if (mask_enc_ports->dst != cpu_to_be16(~0)) 234 return -EOPNOTSUPP; 235 236 if (dissector_uses_key(flow->dissector, 237 FLOW_DISSECTOR_KEY_ENC_OPTS)) { 238 enc_op = skb_flow_dissector_target(flow->dissector, 239 FLOW_DISSECTOR_KEY_ENC_OPTS, 240 flow->key); 241 } 242 243 switch (enc_ports->dst) { 244 case htons(NFP_FL_VXLAN_PORT): 245 *tun_type = NFP_FL_TUNNEL_VXLAN; 246 key_layer |= NFP_FLOWER_LAYER_VXLAN; 247 key_size += sizeof(struct nfp_flower_ipv4_udp_tun); 248 249 if (enc_op) 250 return -EOPNOTSUPP; 251 break; 252 case htons(NFP_FL_GENEVE_PORT): 253 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) 254 return -EOPNOTSUPP; 255 *tun_type = NFP_FL_TUNNEL_GENEVE; 256 key_layer |= NFP_FLOWER_LAYER_EXT_META; 257 key_size += sizeof(struct nfp_flower_ext_meta); 258 key_layer_two |= NFP_FLOWER_LAYER2_GENEVE; 259 key_size += sizeof(struct nfp_flower_ipv4_udp_tun); 260 261 if (!enc_op) 262 break; 263 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)) 264 return -EOPNOTSUPP; 265 err = nfp_flower_calc_opt_layer(enc_op, &key_layer_two, 266 &key_size); 267 if (err) 268 return err; 269 break; 270 default: 271 return -EOPNOTSUPP; 272 } 273 } else if (egress) { 274 /* Reject non tunnel matches offloaded to egress repr. */ 275 return -EOPNOTSUPP; 276 } 277 278 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 279 mask_basic = skb_flow_dissector_target(flow->dissector, 280 FLOW_DISSECTOR_KEY_BASIC, 281 flow->mask); 282 283 key_basic = skb_flow_dissector_target(flow->dissector, 284 FLOW_DISSECTOR_KEY_BASIC, 285 flow->key); 286 } 287 288 if (mask_basic && mask_basic->n_proto) { 289 /* Ethernet type is present in the key. */ 290 switch (key_basic->n_proto) { 291 case cpu_to_be16(ETH_P_IP): 292 key_layer |= NFP_FLOWER_LAYER_IPV4; 293 key_size += sizeof(struct nfp_flower_ipv4); 294 break; 295 296 case cpu_to_be16(ETH_P_IPV6): 297 key_layer |= NFP_FLOWER_LAYER_IPV6; 298 key_size += sizeof(struct nfp_flower_ipv6); 299 break; 300 301 /* Currently we do not offload ARP 302 * because we rely on it to get to the host. 303 */ 304 case cpu_to_be16(ETH_P_ARP): 305 return -EOPNOTSUPP; 306 307 case cpu_to_be16(ETH_P_MPLS_UC): 308 case cpu_to_be16(ETH_P_MPLS_MC): 309 if (!(key_layer & NFP_FLOWER_LAYER_MAC)) { 310 key_layer |= NFP_FLOWER_LAYER_MAC; 311 key_size += sizeof(struct nfp_flower_mac_mpls); 312 } 313 break; 314 315 /* Will be included in layer 2. */ 316 case cpu_to_be16(ETH_P_8021Q): 317 break; 318 319 default: 320 /* Other ethtype - we need check the masks for the 321 * remainder of the key to ensure we can offload. 322 */ 323 if (nfp_flower_check_higher_than_mac(flow)) 324 return -EOPNOTSUPP; 325 break; 326 } 327 } 328 329 if (mask_basic && mask_basic->ip_proto) { 330 /* Ethernet type is present in the key. */ 331 switch (key_basic->ip_proto) { 332 case IPPROTO_TCP: 333 case IPPROTO_UDP: 334 case IPPROTO_SCTP: 335 case IPPROTO_ICMP: 336 case IPPROTO_ICMPV6: 337 key_layer |= NFP_FLOWER_LAYER_TP; 338 key_size += sizeof(struct nfp_flower_tp_ports); 339 break; 340 default: 341 /* Other ip proto - we need check the masks for the 342 * remainder of the key to ensure we can offload. 343 */ 344 return -EOPNOTSUPP; 345 } 346 } 347 348 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) { 349 struct flow_dissector_key_tcp *tcp; 350 u32 tcp_flags; 351 352 tcp = skb_flow_dissector_target(flow->dissector, 353 FLOW_DISSECTOR_KEY_TCP, 354 flow->key); 355 tcp_flags = be16_to_cpu(tcp->flags); 356 357 if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS) 358 return -EOPNOTSUPP; 359 360 /* We only support PSH and URG flags when either 361 * FIN, SYN or RST is present as well. 362 */ 363 if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) && 364 !(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST))) 365 return -EOPNOTSUPP; 366 367 /* We need to store TCP flags in the IPv4 key space, thus 368 * we need to ensure we include a IPv4 key layer if we have 369 * not done so already. 370 */ 371 if (!(key_layer & NFP_FLOWER_LAYER_IPV4)) { 372 key_layer |= NFP_FLOWER_LAYER_IPV4; 373 key_size += sizeof(struct nfp_flower_ipv4); 374 } 375 } 376 377 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { 378 struct flow_dissector_key_control *key_ctl; 379 380 key_ctl = skb_flow_dissector_target(flow->dissector, 381 FLOW_DISSECTOR_KEY_CONTROL, 382 flow->key); 383 384 if (key_ctl->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS) 385 return -EOPNOTSUPP; 386 } 387 388 ret_key_ls->key_layer = key_layer; 389 ret_key_ls->key_layer_two = key_layer_two; 390 ret_key_ls->key_size = key_size; 391 392 return 0; 393 } 394 395 static struct nfp_fl_payload * 396 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer, bool egress) 397 { 398 struct nfp_fl_payload *flow_pay; 399 400 flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL); 401 if (!flow_pay) 402 return NULL; 403 404 flow_pay->meta.key_len = key_layer->key_size; 405 flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL); 406 if (!flow_pay->unmasked_data) 407 goto err_free_flow; 408 409 flow_pay->meta.mask_len = key_layer->key_size; 410 flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL); 411 if (!flow_pay->mask_data) 412 goto err_free_unmasked; 413 414 flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL); 415 if (!flow_pay->action_data) 416 goto err_free_mask; 417 418 flow_pay->nfp_tun_ipv4_addr = 0; 419 flow_pay->meta.flags = 0; 420 spin_lock_init(&flow_pay->lock); 421 422 flow_pay->ingress_offload = !egress; 423 424 return flow_pay; 425 426 err_free_mask: 427 kfree(flow_pay->mask_data); 428 err_free_unmasked: 429 kfree(flow_pay->unmasked_data); 430 err_free_flow: 431 kfree(flow_pay); 432 return NULL; 433 } 434 435 /** 436 * nfp_flower_add_offload() - Adds a new flow to hardware. 437 * @app: Pointer to the APP handle 438 * @netdev: netdev structure. 439 * @flow: TC flower classifier offload structure. 440 * @egress: NFP netdev is the egress. 441 * 442 * Adds a new flow to the repeated hash structure and action payload. 443 * 444 * Return: negative value on error, 0 if configured successfully. 445 */ 446 static int 447 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev, 448 struct tc_cls_flower_offload *flow, bool egress) 449 { 450 enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE; 451 struct nfp_port *port = nfp_port_from_netdev(netdev); 452 struct nfp_flower_priv *priv = app->priv; 453 struct nfp_fl_payload *flow_pay; 454 struct nfp_fl_key_ls *key_layer; 455 struct net_device *ingr_dev; 456 int err; 457 458 ingr_dev = egress ? NULL : netdev; 459 flow_pay = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev, 460 NFP_FL_STATS_CTX_DONT_CARE); 461 if (flow_pay) { 462 /* Ignore as duplicate if it has been added by different cb. */ 463 if (flow_pay->ingress_offload && egress) 464 return 0; 465 else 466 return -EOPNOTSUPP; 467 } 468 469 key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL); 470 if (!key_layer) 471 return -ENOMEM; 472 473 err = nfp_flower_calculate_key_layers(app, key_layer, flow, egress, 474 &tun_type); 475 if (err) 476 goto err_free_key_ls; 477 478 flow_pay = nfp_flower_allocate_new(key_layer, egress); 479 if (!flow_pay) { 480 err = -ENOMEM; 481 goto err_free_key_ls; 482 } 483 484 flow_pay->ingress_dev = egress ? NULL : netdev; 485 486 err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay, 487 tun_type); 488 if (err) 489 goto err_destroy_flow; 490 491 err = nfp_flower_compile_action(app, flow, netdev, flow_pay); 492 if (err) 493 goto err_destroy_flow; 494 495 err = nfp_compile_flow_metadata(app, flow, flow_pay, 496 flow_pay->ingress_dev); 497 if (err) 498 goto err_destroy_flow; 499 500 err = nfp_flower_xmit_flow(netdev, flow_pay, 501 NFP_FLOWER_CMSG_TYPE_FLOW_ADD); 502 if (err) 503 goto err_destroy_flow; 504 505 INIT_HLIST_NODE(&flow_pay->link); 506 flow_pay->tc_flower_cookie = flow->cookie; 507 hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie); 508 port->tc_offload_cnt++; 509 510 /* Deallocate flow payload when flower rule has been destroyed. */ 511 kfree(key_layer); 512 513 return 0; 514 515 err_destroy_flow: 516 kfree(flow_pay->action_data); 517 kfree(flow_pay->mask_data); 518 kfree(flow_pay->unmasked_data); 519 kfree(flow_pay); 520 err_free_key_ls: 521 kfree(key_layer); 522 return err; 523 } 524 525 /** 526 * nfp_flower_del_offload() - Removes a flow from hardware. 527 * @app: Pointer to the APP handle 528 * @netdev: netdev structure. 529 * @flow: TC flower classifier offload structure 530 * @egress: Netdev is the egress dev. 531 * 532 * Removes a flow from the repeated hash structure and clears the 533 * action payload. 534 * 535 * Return: negative value on error, 0 if removed successfully. 536 */ 537 static int 538 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev, 539 struct tc_cls_flower_offload *flow, bool egress) 540 { 541 struct nfp_port *port = nfp_port_from_netdev(netdev); 542 struct nfp_fl_payload *nfp_flow; 543 struct net_device *ingr_dev; 544 int err; 545 546 ingr_dev = egress ? NULL : netdev; 547 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev, 548 NFP_FL_STATS_CTX_DONT_CARE); 549 if (!nfp_flow) 550 return egress ? 0 : -ENOENT; 551 552 err = nfp_modify_flow_metadata(app, nfp_flow); 553 if (err) 554 goto err_free_flow; 555 556 if (nfp_flow->nfp_tun_ipv4_addr) 557 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr); 558 559 err = nfp_flower_xmit_flow(netdev, nfp_flow, 560 NFP_FLOWER_CMSG_TYPE_FLOW_DEL); 561 if (err) 562 goto err_free_flow; 563 564 err_free_flow: 565 hash_del_rcu(&nfp_flow->link); 566 port->tc_offload_cnt--; 567 kfree(nfp_flow->action_data); 568 kfree(nfp_flow->mask_data); 569 kfree(nfp_flow->unmasked_data); 570 kfree_rcu(nfp_flow, rcu); 571 return err; 572 } 573 574 /** 575 * nfp_flower_get_stats() - Populates flow stats obtained from hardware. 576 * @app: Pointer to the APP handle 577 * @netdev: Netdev structure. 578 * @flow: TC flower classifier offload structure 579 * @egress: Netdev is the egress dev. 580 * 581 * Populates a flow statistics structure which which corresponds to a 582 * specific flow. 583 * 584 * Return: negative value on error, 0 if stats populated successfully. 585 */ 586 static int 587 nfp_flower_get_stats(struct nfp_app *app, struct net_device *netdev, 588 struct tc_cls_flower_offload *flow, bool egress) 589 { 590 struct nfp_fl_payload *nfp_flow; 591 struct net_device *ingr_dev; 592 593 ingr_dev = egress ? NULL : netdev; 594 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, ingr_dev, 595 NFP_FL_STATS_CTX_DONT_CARE); 596 if (!nfp_flow) 597 return -EINVAL; 598 599 if (nfp_flow->ingress_offload && egress) 600 return 0; 601 602 spin_lock_bh(&nfp_flow->lock); 603 tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes, 604 nfp_flow->stats.pkts, nfp_flow->stats.used); 605 606 nfp_flow->stats.pkts = 0; 607 nfp_flow->stats.bytes = 0; 608 spin_unlock_bh(&nfp_flow->lock); 609 610 return 0; 611 } 612 613 static int 614 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev, 615 struct tc_cls_flower_offload *flower, bool egress) 616 { 617 if (!eth_proto_is_802_3(flower->common.protocol)) 618 return -EOPNOTSUPP; 619 620 switch (flower->command) { 621 case TC_CLSFLOWER_REPLACE: 622 return nfp_flower_add_offload(app, netdev, flower, egress); 623 case TC_CLSFLOWER_DESTROY: 624 return nfp_flower_del_offload(app, netdev, flower, egress); 625 case TC_CLSFLOWER_STATS: 626 return nfp_flower_get_stats(app, netdev, flower, egress); 627 default: 628 return -EOPNOTSUPP; 629 } 630 } 631 632 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data, 633 void *cb_priv) 634 { 635 struct nfp_repr *repr = cb_priv; 636 637 if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data)) 638 return -EOPNOTSUPP; 639 640 switch (type) { 641 case TC_SETUP_CLSFLOWER: 642 return nfp_flower_repr_offload(repr->app, repr->netdev, 643 type_data, true); 644 default: 645 return -EOPNOTSUPP; 646 } 647 } 648 649 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type, 650 void *type_data, void *cb_priv) 651 { 652 struct nfp_repr *repr = cb_priv; 653 654 if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data)) 655 return -EOPNOTSUPP; 656 657 switch (type) { 658 case TC_SETUP_CLSFLOWER: 659 return nfp_flower_repr_offload(repr->app, repr->netdev, 660 type_data, false); 661 default: 662 return -EOPNOTSUPP; 663 } 664 } 665 666 static int nfp_flower_setup_tc_block(struct net_device *netdev, 667 struct tc_block_offload *f) 668 { 669 struct nfp_repr *repr = netdev_priv(netdev); 670 671 if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 672 return -EOPNOTSUPP; 673 674 switch (f->command) { 675 case TC_BLOCK_BIND: 676 return tcf_block_cb_register(f->block, 677 nfp_flower_setup_tc_block_cb, 678 repr, repr, f->extack); 679 case TC_BLOCK_UNBIND: 680 tcf_block_cb_unregister(f->block, 681 nfp_flower_setup_tc_block_cb, 682 repr); 683 return 0; 684 default: 685 return -EOPNOTSUPP; 686 } 687 } 688 689 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 690 enum tc_setup_type type, void *type_data) 691 { 692 switch (type) { 693 case TC_SETUP_BLOCK: 694 return nfp_flower_setup_tc_block(netdev, type_data); 695 default: 696 return -EOPNOTSUPP; 697 } 698 } 699