1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ 3 4 #include <linux/bitfield.h> 5 #include <linux/mpls.h> 6 #include <net/pkt_cls.h> 7 #include <net/tc_act/tc_csum.h> 8 #include <net/tc_act/tc_gact.h> 9 #include <net/tc_act/tc_mirred.h> 10 #include <net/tc_act/tc_mpls.h> 11 #include <net/tc_act/tc_pedit.h> 12 #include <net/tc_act/tc_vlan.h> 13 #include <net/tc_act/tc_tunnel_key.h> 14 15 #include "cmsg.h" 16 #include "main.h" 17 #include "../nfp_net_repr.h" 18 19 /* The kernel versions of TUNNEL_* are not ABI and therefore vulnerable 20 * to change. Such changes will break our FW ABI. 21 */ 22 #define NFP_FL_TUNNEL_CSUM cpu_to_be16(0x01) 23 #define NFP_FL_TUNNEL_KEY cpu_to_be16(0x04) 24 #define NFP_FL_TUNNEL_GENEVE_OPT cpu_to_be16(0x0800) 25 #define NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS (IP_TUNNEL_INFO_TX | \ 26 IP_TUNNEL_INFO_IPV6) 27 #define NFP_FL_SUPPORTED_UDP_TUN_FLAGS (NFP_FL_TUNNEL_CSUM | \ 28 NFP_FL_TUNNEL_KEY | \ 29 NFP_FL_TUNNEL_GENEVE_OPT) 30 31 static int 32 nfp_fl_push_mpls(struct nfp_fl_push_mpls *push_mpls, 33 const struct flow_action_entry *act, 34 struct netlink_ext_ack *extack) 35 { 36 size_t act_size = sizeof(struct nfp_fl_push_mpls); 37 u32 mpls_lse = 0; 38 39 push_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_MPLS; 40 push_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ; 41 42 /* BOS is optional in the TC action but required for offload. */ 43 if (act->mpls_push.bos != ACT_MPLS_BOS_NOT_SET) { 44 mpls_lse |= act->mpls_push.bos << MPLS_LS_S_SHIFT; 45 } else { 46 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: BOS field must explicitly be set for MPLS push"); 47 return -EOPNOTSUPP; 48 } 49 50 /* Leave MPLS TC as a default value of 0 if not explicitly set. */ 51 if (act->mpls_push.tc != ACT_MPLS_TC_NOT_SET) 52 mpls_lse |= act->mpls_push.tc << MPLS_LS_TC_SHIFT; 53 54 /* Proto, label and TTL are enforced and verified for MPLS push. */ 55 mpls_lse |= act->mpls_push.label << MPLS_LS_LABEL_SHIFT; 56 mpls_lse |= act->mpls_push.ttl << MPLS_LS_TTL_SHIFT; 57 push_mpls->ethtype = act->mpls_push.proto; 58 push_mpls->lse = cpu_to_be32(mpls_lse); 59 60 return 0; 61 } 62 63 static void 64 nfp_fl_pop_mpls(struct nfp_fl_pop_mpls *pop_mpls, 65 const struct flow_action_entry *act) 66 { 67 size_t act_size = sizeof(struct nfp_fl_pop_mpls); 68 69 pop_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_POP_MPLS; 70 pop_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ; 71 pop_mpls->ethtype = act->mpls_pop.proto; 72 } 73 74 static void 75 nfp_fl_set_mpls(struct nfp_fl_set_mpls *set_mpls, 76 const struct flow_action_entry *act) 77 { 78 size_t act_size = sizeof(struct nfp_fl_set_mpls); 79 u32 mpls_lse = 0, mpls_mask = 0; 80 81 set_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_SET_MPLS; 82 set_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ; 83 84 if (act->mpls_mangle.label != ACT_MPLS_LABEL_NOT_SET) { 85 mpls_lse |= act->mpls_mangle.label << MPLS_LS_LABEL_SHIFT; 86 mpls_mask |= MPLS_LS_LABEL_MASK; 87 } 88 if (act->mpls_mangle.tc != ACT_MPLS_TC_NOT_SET) { 89 mpls_lse |= act->mpls_mangle.tc << MPLS_LS_TC_SHIFT; 90 mpls_mask |= MPLS_LS_TC_MASK; 91 } 92 if (act->mpls_mangle.bos != ACT_MPLS_BOS_NOT_SET) { 93 mpls_lse |= act->mpls_mangle.bos << MPLS_LS_S_SHIFT; 94 mpls_mask |= MPLS_LS_S_MASK; 95 } 96 if (act->mpls_mangle.ttl) { 97 mpls_lse |= act->mpls_mangle.ttl << MPLS_LS_TTL_SHIFT; 98 mpls_mask |= MPLS_LS_TTL_MASK; 99 } 100 101 set_mpls->lse = cpu_to_be32(mpls_lse); 102 set_mpls->lse_mask = cpu_to_be32(mpls_mask); 103 } 104 105 static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan) 106 { 107 size_t act_size = sizeof(struct nfp_fl_pop_vlan); 108 109 pop_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_POP_VLAN; 110 pop_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ; 111 pop_vlan->reserved = 0; 112 } 113 114 static void 115 nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan, 116 const struct flow_action_entry *act) 117 { 118 size_t act_size = sizeof(struct nfp_fl_push_vlan); 119 u16 tmp_push_vlan_tci; 120 121 push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN; 122 push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ; 123 push_vlan->reserved = 0; 124 push_vlan->vlan_tpid = act->vlan.proto; 125 126 tmp_push_vlan_tci = 127 FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, act->vlan.prio) | 128 FIELD_PREP(NFP_FL_PUSH_VLAN_VID, act->vlan.vid); 129 push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci); 130 } 131 132 static int 133 nfp_fl_pre_lag(struct nfp_app *app, const struct flow_action_entry *act, 134 struct nfp_fl_payload *nfp_flow, int act_len, 135 struct netlink_ext_ack *extack) 136 { 137 size_t act_size = sizeof(struct nfp_fl_pre_lag); 138 struct nfp_fl_pre_lag *pre_lag; 139 struct net_device *out_dev; 140 int err; 141 142 out_dev = act->dev; 143 if (!out_dev || !netif_is_lag_master(out_dev)) 144 return 0; 145 146 if (act_len + act_size > NFP_FL_MAX_A_SIZ) { 147 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at LAG action"); 148 return -EOPNOTSUPP; 149 } 150 151 /* Pre_lag action must be first on action list. 152 * If other actions already exist they need to be pushed forward. 153 */ 154 if (act_len) 155 memmove(nfp_flow->action_data + act_size, 156 nfp_flow->action_data, act_len); 157 158 pre_lag = (struct nfp_fl_pre_lag *)nfp_flow->action_data; 159 err = nfp_flower_lag_populate_pre_action(app, out_dev, pre_lag, extack); 160 if (err) 161 return err; 162 163 pre_lag->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_LAG; 164 pre_lag->head.len_lw = act_size >> NFP_FL_LW_SIZ; 165 166 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 167 168 return act_size; 169 } 170 171 static int 172 nfp_fl_output(struct nfp_app *app, struct nfp_fl_output *output, 173 const struct flow_action_entry *act, 174 struct nfp_fl_payload *nfp_flow, 175 bool last, struct net_device *in_dev, 176 enum nfp_flower_tun_type tun_type, int *tun_out_cnt, 177 bool pkt_host, struct netlink_ext_ack *extack) 178 { 179 size_t act_size = sizeof(struct nfp_fl_output); 180 struct nfp_flower_priv *priv = app->priv; 181 struct net_device *out_dev; 182 u16 tmp_flags; 183 184 output->head.jump_id = NFP_FL_ACTION_OPCODE_OUTPUT; 185 output->head.len_lw = act_size >> NFP_FL_LW_SIZ; 186 187 out_dev = act->dev; 188 if (!out_dev) { 189 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid egress interface for mirred action"); 190 return -EOPNOTSUPP; 191 } 192 193 tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0; 194 195 if (tun_type) { 196 /* Verify the egress netdev matches the tunnel type. */ 197 if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type)) { 198 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: egress interface does not match the required tunnel type"); 199 return -EOPNOTSUPP; 200 } 201 202 if (*tun_out_cnt) { 203 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot offload more than one tunnel mirred output per filter"); 204 return -EOPNOTSUPP; 205 } 206 (*tun_out_cnt)++; 207 208 output->flags = cpu_to_be16(tmp_flags | 209 NFP_FL_OUT_FLAGS_USE_TUN); 210 output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type); 211 } else if (netif_is_lag_master(out_dev) && 212 priv->flower_en_feats & NFP_FL_ENABLE_LAG) { 213 int gid; 214 215 output->flags = cpu_to_be16(tmp_flags); 216 gid = nfp_flower_lag_get_output_id(app, out_dev); 217 if (gid < 0) { 218 NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot find group id for LAG action"); 219 return gid; 220 } 221 output->port = cpu_to_be32(NFP_FL_LAG_OUT | gid); 222 } else if (nfp_flower_internal_port_can_offload(app, out_dev)) { 223 if (!(priv->flower_ext_feats & NFP_FL_FEATS_PRE_TUN_RULES) && 224 !(priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2)) { 225 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules not supported in loaded firmware"); 226 return -EOPNOTSUPP; 227 } 228 229 if (nfp_flow->pre_tun_rule.dev || !pkt_host) { 230 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules require single egress dev and ptype HOST action"); 231 return -EOPNOTSUPP; 232 } 233 234 nfp_flow->pre_tun_rule.dev = out_dev; 235 236 return 0; 237 } else { 238 /* Set action output parameters. */ 239 output->flags = cpu_to_be16(tmp_flags); 240 241 if (nfp_netdev_is_nfp_repr(in_dev)) { 242 /* Confirm ingress and egress are on same device. */ 243 if (!netdev_port_same_parent_id(in_dev, out_dev)) { 244 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ingress and egress interfaces are on different devices"); 245 return -EOPNOTSUPP; 246 } 247 } 248 249 if (!nfp_netdev_is_nfp_repr(out_dev)) { 250 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: egress interface is not an nfp port"); 251 return -EOPNOTSUPP; 252 } 253 254 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev)); 255 if (!output->port) { 256 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid port id for egress interface"); 257 return -EOPNOTSUPP; 258 } 259 } 260 nfp_flow->meta.shortcut = output->port; 261 262 return 0; 263 } 264 265 static bool 266 nfp_flower_tun_is_gre(struct flow_rule *rule, int start_idx) 267 { 268 struct flow_action_entry *act = rule->action.entries; 269 int num_act = rule->action.num_entries; 270 int act_idx; 271 272 /* Preparse action list for next mirred or redirect action */ 273 for (act_idx = start_idx + 1; act_idx < num_act; act_idx++) 274 if (act[act_idx].id == FLOW_ACTION_REDIRECT || 275 act[act_idx].id == FLOW_ACTION_MIRRED) 276 return netif_is_gretap(act[act_idx].dev) || 277 netif_is_ip6gretap(act[act_idx].dev); 278 279 return false; 280 } 281 282 static enum nfp_flower_tun_type 283 nfp_fl_get_tun_from_act(struct nfp_app *app, 284 struct flow_rule *rule, 285 const struct flow_action_entry *act, int act_idx) 286 { 287 const struct ip_tunnel_info *tun = act->tunnel; 288 struct nfp_flower_priv *priv = app->priv; 289 290 /* Determine the tunnel type based on the egress netdev 291 * in the mirred action for tunnels without l4. 292 */ 293 if (nfp_flower_tun_is_gre(rule, act_idx)) 294 return NFP_FL_TUNNEL_GRE; 295 296 switch (tun->key.tp_dst) { 297 case htons(IANA_VXLAN_UDP_PORT): 298 return NFP_FL_TUNNEL_VXLAN; 299 case htons(GENEVE_UDP_PORT): 300 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE) 301 return NFP_FL_TUNNEL_GENEVE; 302 fallthrough; 303 default: 304 return NFP_FL_TUNNEL_NONE; 305 } 306 } 307 308 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len) 309 { 310 size_t act_size = sizeof(struct nfp_fl_pre_tunnel); 311 struct nfp_fl_pre_tunnel *pre_tun_act; 312 313 /* Pre_tunnel action must be first on action list. 314 * If other actions already exist they need to be pushed forward. 315 */ 316 if (act_len) 317 memmove(act_data + act_size, act_data, act_len); 318 319 pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data; 320 321 memset(pre_tun_act, 0, act_size); 322 323 pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL; 324 pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ; 325 326 return pre_tun_act; 327 } 328 329 static int 330 nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len, 331 const struct flow_action_entry *act, 332 struct netlink_ext_ack *extack) 333 { 334 struct ip_tunnel_info *ip_tun = (struct ip_tunnel_info *)act->tunnel; 335 int opt_len, opt_cnt, act_start, tot_push_len; 336 u8 *src = ip_tunnel_info_opts(ip_tun); 337 338 /* We need to populate the options in reverse order for HW. 339 * Therefore we go through the options, calculating the 340 * number of options and the total size, then we populate 341 * them in reverse order in the action list. 342 */ 343 opt_cnt = 0; 344 tot_push_len = 0; 345 opt_len = ip_tun->options_len; 346 while (opt_len > 0) { 347 struct geneve_opt *opt = (struct geneve_opt *)src; 348 349 opt_cnt++; 350 if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT) { 351 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed number of geneve options exceeded"); 352 return -EOPNOTSUPP; 353 } 354 355 tot_push_len += sizeof(struct nfp_fl_push_geneve) + 356 opt->length * 4; 357 if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT) { 358 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options"); 359 return -EOPNOTSUPP; 360 } 361 362 opt_len -= sizeof(struct geneve_opt) + opt->length * 4; 363 src += sizeof(struct geneve_opt) + opt->length * 4; 364 } 365 366 if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ) { 367 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options"); 368 return -EOPNOTSUPP; 369 } 370 371 act_start = *list_len; 372 *list_len += tot_push_len; 373 src = ip_tunnel_info_opts(ip_tun); 374 while (opt_cnt) { 375 struct geneve_opt *opt = (struct geneve_opt *)src; 376 struct nfp_fl_push_geneve *push; 377 size_t act_size, len; 378 379 opt_cnt--; 380 act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4; 381 tot_push_len -= act_size; 382 len = act_start + tot_push_len; 383 384 push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len]; 385 push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE; 386 push->head.len_lw = act_size >> NFP_FL_LW_SIZ; 387 push->reserved = 0; 388 push->class = opt->opt_class; 389 push->type = opt->type; 390 push->length = opt->length; 391 memcpy(&push->opt_data, opt->opt_data, opt->length * 4); 392 393 src += sizeof(struct geneve_opt) + opt->length * 4; 394 } 395 396 return 0; 397 } 398 399 static int 400 nfp_fl_set_tun(struct nfp_app *app, struct nfp_fl_set_tun *set_tun, 401 const struct flow_action_entry *act, 402 struct nfp_fl_pre_tunnel *pre_tun, 403 enum nfp_flower_tun_type tun_type, 404 struct net_device *netdev, struct netlink_ext_ack *extack) 405 { 406 const struct ip_tunnel_info *ip_tun = act->tunnel; 407 bool ipv6 = ip_tunnel_info_af(ip_tun) == AF_INET6; 408 size_t act_size = sizeof(struct nfp_fl_set_tun); 409 struct nfp_flower_priv *priv = app->priv; 410 u32 tmp_set_ip_tun_type_index = 0; 411 /* Currently support one pre-tunnel so index is always 0. */ 412 int pretun_idx = 0; 413 414 if (!IS_ENABLED(CONFIG_IPV6) && ipv6) 415 return -EOPNOTSUPP; 416 417 if (ipv6 && !(priv->flower_ext_feats & NFP_FL_FEATS_IPV6_TUN)) 418 return -EOPNOTSUPP; 419 420 BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM || 421 NFP_FL_TUNNEL_KEY != TUNNEL_KEY || 422 NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT); 423 if (ip_tun->options_len && 424 (tun_type != NFP_FL_TUNNEL_GENEVE || 425 !(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT))) { 426 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve options offload"); 427 return -EOPNOTSUPP; 428 } 429 430 set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_TUNNEL; 431 set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ; 432 433 /* Set tunnel type and pre-tunnel index. */ 434 tmp_set_ip_tun_type_index |= 435 FIELD_PREP(NFP_FL_TUNNEL_TYPE, tun_type) | 436 FIELD_PREP(NFP_FL_PRE_TUN_INDEX, pretun_idx); 437 438 set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index); 439 set_tun->tun_id = ip_tun->key.tun_id; 440 441 if (ip_tun->key.ttl) { 442 set_tun->ttl = ip_tun->key.ttl; 443 #ifdef CONFIG_IPV6 444 } else if (ipv6) { 445 struct net *net = dev_net(netdev); 446 struct flowi6 flow = {}; 447 struct dst_entry *dst; 448 449 flow.daddr = ip_tun->key.u.ipv6.dst; 450 flow.flowi4_proto = IPPROTO_UDP; 451 dst = ipv6_stub->ipv6_dst_lookup_flow(net, NULL, &flow, NULL); 452 if (!IS_ERR(dst)) { 453 set_tun->ttl = ip6_dst_hoplimit(dst); 454 dst_release(dst); 455 } else { 456 set_tun->ttl = net->ipv6.devconf_all->hop_limit; 457 } 458 #endif 459 } else { 460 struct net *net = dev_net(netdev); 461 struct flowi4 flow = {}; 462 struct rtable *rt; 463 int err; 464 465 /* Do a route lookup to determine ttl - if fails then use 466 * default. Note that CONFIG_INET is a requirement of 467 * CONFIG_NET_SWITCHDEV so must be defined here. 468 */ 469 flow.daddr = ip_tun->key.u.ipv4.dst; 470 flow.flowi4_proto = IPPROTO_UDP; 471 rt = ip_route_output_key(net, &flow); 472 err = PTR_ERR_OR_ZERO(rt); 473 if (!err) { 474 set_tun->ttl = ip4_dst_hoplimit(&rt->dst); 475 ip_rt_put(rt); 476 } else { 477 set_tun->ttl = READ_ONCE(net->ipv4.sysctl_ip_default_ttl); 478 } 479 } 480 481 set_tun->tos = ip_tun->key.tos; 482 483 if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) || 484 ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_UDP_TUN_FLAGS) { 485 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support tunnel flag offload"); 486 return -EOPNOTSUPP; 487 } 488 set_tun->tun_flags = ip_tun->key.tun_flags; 489 490 if (tun_type == NFP_FL_TUNNEL_GENEVE) { 491 set_tun->tun_proto = htons(ETH_P_TEB); 492 set_tun->tun_len = ip_tun->options_len / 4; 493 } 494 495 /* Complete pre_tunnel action. */ 496 if (ipv6) { 497 pre_tun->flags |= cpu_to_be16(NFP_FL_PRE_TUN_IPV6); 498 pre_tun->ipv6_dst = ip_tun->key.u.ipv6.dst; 499 } else { 500 pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst; 501 } 502 503 return 0; 504 } 505 506 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask) 507 { 508 u32 oldvalue = get_unaligned((u32 *)p_exact); 509 u32 oldmask = get_unaligned((u32 *)p_mask); 510 511 value &= mask; 512 value |= oldvalue & ~mask; 513 514 put_unaligned(oldmask | mask, (u32 *)p_mask); 515 put_unaligned(value, (u32 *)p_exact); 516 } 517 518 static int 519 nfp_fl_set_eth(const struct flow_action_entry *act, u32 off, 520 struct nfp_fl_set_eth *set_eth, struct netlink_ext_ack *extack) 521 { 522 u32 exact, mask; 523 524 if (off + 4 > ETH_ALEN * 2) { 525 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action"); 526 return -EOPNOTSUPP; 527 } 528 529 mask = ~act->mangle.mask; 530 exact = act->mangle.val; 531 532 if (exact & ~mask) { 533 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action"); 534 return -EOPNOTSUPP; 535 } 536 537 nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off], 538 &set_eth->eth_addr_mask[off]); 539 540 set_eth->reserved = cpu_to_be16(0); 541 set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET; 542 set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ; 543 544 return 0; 545 } 546 547 struct ipv4_ttl_word { 548 __u8 ttl; 549 __u8 protocol; 550 __sum16 check; 551 }; 552 553 static int 554 nfp_fl_set_ip4(const struct flow_action_entry *act, u32 off, 555 struct nfp_fl_set_ip4_addrs *set_ip_addr, 556 struct nfp_fl_set_ip4_ttl_tos *set_ip_ttl_tos, 557 struct netlink_ext_ack *extack) 558 { 559 struct ipv4_ttl_word *ttl_word_mask; 560 struct ipv4_ttl_word *ttl_word; 561 struct iphdr *tos_word_mask; 562 struct iphdr *tos_word; 563 __be32 exact, mask; 564 565 /* We are expecting tcf_pedit to return a big endian value */ 566 mask = (__force __be32)~act->mangle.mask; 567 exact = (__force __be32)act->mangle.val; 568 569 if (exact & ~mask) { 570 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 action"); 571 return -EOPNOTSUPP; 572 } 573 574 switch (off) { 575 case offsetof(struct iphdr, daddr): 576 set_ip_addr->ipv4_dst_mask |= mask; 577 set_ip_addr->ipv4_dst &= ~mask; 578 set_ip_addr->ipv4_dst |= exact & mask; 579 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS; 580 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> 581 NFP_FL_LW_SIZ; 582 break; 583 case offsetof(struct iphdr, saddr): 584 set_ip_addr->ipv4_src_mask |= mask; 585 set_ip_addr->ipv4_src &= ~mask; 586 set_ip_addr->ipv4_src |= exact & mask; 587 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS; 588 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> 589 NFP_FL_LW_SIZ; 590 break; 591 case offsetof(struct iphdr, ttl): 592 ttl_word_mask = (struct ipv4_ttl_word *)&mask; 593 ttl_word = (struct ipv4_ttl_word *)&exact; 594 595 if (ttl_word_mask->protocol || ttl_word_mask->check) { 596 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 ttl action"); 597 return -EOPNOTSUPP; 598 } 599 600 set_ip_ttl_tos->ipv4_ttl_mask |= ttl_word_mask->ttl; 601 set_ip_ttl_tos->ipv4_ttl &= ~ttl_word_mask->ttl; 602 set_ip_ttl_tos->ipv4_ttl |= ttl_word->ttl & ttl_word_mask->ttl; 603 set_ip_ttl_tos->head.jump_id = 604 NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS; 605 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >> 606 NFP_FL_LW_SIZ; 607 break; 608 case round_down(offsetof(struct iphdr, tos), 4): 609 tos_word_mask = (struct iphdr *)&mask; 610 tos_word = (struct iphdr *)&exact; 611 612 if (tos_word_mask->version || tos_word_mask->ihl || 613 tos_word_mask->tot_len) { 614 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 tos action"); 615 return -EOPNOTSUPP; 616 } 617 618 set_ip_ttl_tos->ipv4_tos_mask |= tos_word_mask->tos; 619 set_ip_ttl_tos->ipv4_tos &= ~tos_word_mask->tos; 620 set_ip_ttl_tos->ipv4_tos |= tos_word->tos & tos_word_mask->tos; 621 set_ip_ttl_tos->head.jump_id = 622 NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS; 623 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >> 624 NFP_FL_LW_SIZ; 625 break; 626 default: 627 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv4 header"); 628 return -EOPNOTSUPP; 629 } 630 631 return 0; 632 } 633 634 static void 635 nfp_fl_set_ip6_helper(int opcode_tag, u8 word, __be32 exact, __be32 mask, 636 struct nfp_fl_set_ipv6_addr *ip6) 637 { 638 ip6->ipv6[word].mask |= mask; 639 ip6->ipv6[word].exact &= ~mask; 640 ip6->ipv6[word].exact |= exact & mask; 641 642 ip6->reserved = cpu_to_be16(0); 643 ip6->head.jump_id = opcode_tag; 644 ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ; 645 } 646 647 struct ipv6_hop_limit_word { 648 __be16 payload_len; 649 u8 nexthdr; 650 u8 hop_limit; 651 }; 652 653 static int 654 nfp_fl_set_ip6_hop_limit_flow_label(u32 off, __be32 exact, __be32 mask, 655 struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl, 656 struct netlink_ext_ack *extack) 657 { 658 struct ipv6_hop_limit_word *fl_hl_mask; 659 struct ipv6_hop_limit_word *fl_hl; 660 661 switch (off) { 662 case offsetof(struct ipv6hdr, payload_len): 663 fl_hl_mask = (struct ipv6_hop_limit_word *)&mask; 664 fl_hl = (struct ipv6_hop_limit_word *)&exact; 665 666 if (fl_hl_mask->nexthdr || fl_hl_mask->payload_len) { 667 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 hop limit action"); 668 return -EOPNOTSUPP; 669 } 670 671 ip_hl_fl->ipv6_hop_limit_mask |= fl_hl_mask->hop_limit; 672 ip_hl_fl->ipv6_hop_limit &= ~fl_hl_mask->hop_limit; 673 ip_hl_fl->ipv6_hop_limit |= fl_hl->hop_limit & 674 fl_hl_mask->hop_limit; 675 break; 676 case round_down(offsetof(struct ipv6hdr, flow_lbl), 4): 677 if (mask & ~IPV6_FLOWINFO_MASK || 678 exact & ~IPV6_FLOWINFO_MASK) { 679 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 flow info action"); 680 return -EOPNOTSUPP; 681 } 682 683 ip_hl_fl->ipv6_label_mask |= mask; 684 ip_hl_fl->ipv6_label &= ~mask; 685 ip_hl_fl->ipv6_label |= exact & mask; 686 break; 687 } 688 689 ip_hl_fl->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV6_TC_HL_FL; 690 ip_hl_fl->head.len_lw = sizeof(*ip_hl_fl) >> NFP_FL_LW_SIZ; 691 692 return 0; 693 } 694 695 static int 696 nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off, 697 struct nfp_fl_set_ipv6_addr *ip_dst, 698 struct nfp_fl_set_ipv6_addr *ip_src, 699 struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl, 700 struct netlink_ext_ack *extack) 701 { 702 __be32 exact, mask; 703 int err = 0; 704 u8 word; 705 706 /* We are expecting tcf_pedit to return a big endian value */ 707 mask = (__force __be32)~act->mangle.mask; 708 exact = (__force __be32)act->mangle.val; 709 710 if (exact & ~mask) { 711 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 action"); 712 return -EOPNOTSUPP; 713 } 714 715 if (off < offsetof(struct ipv6hdr, saddr)) { 716 err = nfp_fl_set_ip6_hop_limit_flow_label(off, exact, mask, 717 ip_hl_fl, extack); 718 } else if (off < offsetof(struct ipv6hdr, daddr)) { 719 word = (off - offsetof(struct ipv6hdr, saddr)) / sizeof(exact); 720 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, word, 721 exact, mask, ip_src); 722 } else if (off < offsetof(struct ipv6hdr, daddr) + 723 sizeof(struct in6_addr)) { 724 word = (off - offsetof(struct ipv6hdr, daddr)) / sizeof(exact); 725 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, word, 726 exact, mask, ip_dst); 727 } else { 728 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv6 header"); 729 return -EOPNOTSUPP; 730 } 731 732 return err; 733 } 734 735 static int 736 nfp_fl_set_tport(const struct flow_action_entry *act, u32 off, 737 struct nfp_fl_set_tport *set_tport, int opcode, 738 struct netlink_ext_ack *extack) 739 { 740 u32 exact, mask; 741 742 if (off) { 743 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of L4 header"); 744 return -EOPNOTSUPP; 745 } 746 747 mask = ~act->mangle.mask; 748 exact = act->mangle.val; 749 750 if (exact & ~mask) { 751 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit L4 action"); 752 return -EOPNOTSUPP; 753 } 754 755 nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val, 756 set_tport->tp_port_mask); 757 758 set_tport->reserved = cpu_to_be16(0); 759 set_tport->head.jump_id = opcode; 760 set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ; 761 762 return 0; 763 } 764 765 static u32 nfp_fl_csum_l4_to_flag(u8 ip_proto) 766 { 767 switch (ip_proto) { 768 case 0: 769 /* Filter doesn't force proto match, 770 * both TCP and UDP will be updated if encountered 771 */ 772 return TCA_CSUM_UPDATE_FLAG_TCP | TCA_CSUM_UPDATE_FLAG_UDP; 773 case IPPROTO_TCP: 774 return TCA_CSUM_UPDATE_FLAG_TCP; 775 case IPPROTO_UDP: 776 return TCA_CSUM_UPDATE_FLAG_UDP; 777 default: 778 /* All other protocols will be ignored by FW */ 779 return 0; 780 } 781 } 782 783 struct nfp_flower_pedit_acts { 784 struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src; 785 struct nfp_fl_set_ipv6_tc_hl_fl set_ip6_tc_hl_fl; 786 struct nfp_fl_set_ip4_ttl_tos set_ip_ttl_tos; 787 struct nfp_fl_set_ip4_addrs set_ip_addr; 788 struct nfp_fl_set_tport set_tport; 789 struct nfp_fl_set_eth set_eth; 790 }; 791 792 static int 793 nfp_fl_commit_mangle(struct flow_rule *rule, char *nfp_action, 794 int *a_len, struct nfp_flower_pedit_acts *set_act, 795 u32 *csum_updated) 796 { 797 size_t act_size = 0; 798 u8 ip_proto = 0; 799 800 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 801 struct flow_match_basic match; 802 803 flow_rule_match_basic(rule, &match); 804 ip_proto = match.key->ip_proto; 805 } 806 807 if (set_act->set_eth.head.len_lw) { 808 act_size = sizeof(set_act->set_eth); 809 memcpy(nfp_action, &set_act->set_eth, act_size); 810 *a_len += act_size; 811 } 812 813 if (set_act->set_ip_ttl_tos.head.len_lw) { 814 nfp_action += act_size; 815 act_size = sizeof(set_act->set_ip_ttl_tos); 816 memcpy(nfp_action, &set_act->set_ip_ttl_tos, act_size); 817 *a_len += act_size; 818 819 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */ 820 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR | 821 nfp_fl_csum_l4_to_flag(ip_proto); 822 } 823 824 if (set_act->set_ip_addr.head.len_lw) { 825 nfp_action += act_size; 826 act_size = sizeof(set_act->set_ip_addr); 827 memcpy(nfp_action, &set_act->set_ip_addr, act_size); 828 *a_len += act_size; 829 830 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */ 831 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR | 832 nfp_fl_csum_l4_to_flag(ip_proto); 833 } 834 835 if (set_act->set_ip6_tc_hl_fl.head.len_lw) { 836 nfp_action += act_size; 837 act_size = sizeof(set_act->set_ip6_tc_hl_fl); 838 memcpy(nfp_action, &set_act->set_ip6_tc_hl_fl, act_size); 839 *a_len += act_size; 840 841 /* Hardware will automatically fix TCP/UDP checksum. */ 842 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 843 } 844 845 if (set_act->set_ip6_dst.head.len_lw && 846 set_act->set_ip6_src.head.len_lw) { 847 /* TC compiles set src and dst IPv6 address as a single action, 848 * the hardware requires this to be 2 separate actions. 849 */ 850 nfp_action += act_size; 851 act_size = sizeof(set_act->set_ip6_src); 852 memcpy(nfp_action, &set_act->set_ip6_src, act_size); 853 *a_len += act_size; 854 855 act_size = sizeof(set_act->set_ip6_dst); 856 memcpy(&nfp_action[sizeof(set_act->set_ip6_src)], 857 &set_act->set_ip6_dst, act_size); 858 *a_len += act_size; 859 860 /* Hardware will automatically fix TCP/UDP checksum. */ 861 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 862 } else if (set_act->set_ip6_dst.head.len_lw) { 863 nfp_action += act_size; 864 act_size = sizeof(set_act->set_ip6_dst); 865 memcpy(nfp_action, &set_act->set_ip6_dst, act_size); 866 *a_len += act_size; 867 868 /* Hardware will automatically fix TCP/UDP checksum. */ 869 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 870 } else if (set_act->set_ip6_src.head.len_lw) { 871 nfp_action += act_size; 872 act_size = sizeof(set_act->set_ip6_src); 873 memcpy(nfp_action, &set_act->set_ip6_src, act_size); 874 *a_len += act_size; 875 876 /* Hardware will automatically fix TCP/UDP checksum. */ 877 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 878 } 879 if (set_act->set_tport.head.len_lw) { 880 nfp_action += act_size; 881 act_size = sizeof(set_act->set_tport); 882 memcpy(nfp_action, &set_act->set_tport, act_size); 883 *a_len += act_size; 884 885 /* Hardware will automatically fix TCP/UDP checksum. */ 886 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 887 } 888 889 return 0; 890 } 891 892 static int 893 nfp_fl_pedit(const struct flow_action_entry *act, 894 char *nfp_action, int *a_len, 895 u32 *csum_updated, struct nfp_flower_pedit_acts *set_act, 896 struct netlink_ext_ack *extack) 897 { 898 enum flow_action_mangle_base htype; 899 u32 offset; 900 901 htype = act->mangle.htype; 902 offset = act->mangle.offset; 903 904 switch (htype) { 905 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 906 return nfp_fl_set_eth(act, offset, &set_act->set_eth, extack); 907 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 908 return nfp_fl_set_ip4(act, offset, &set_act->set_ip_addr, 909 &set_act->set_ip_ttl_tos, extack); 910 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 911 return nfp_fl_set_ip6(act, offset, &set_act->set_ip6_dst, 912 &set_act->set_ip6_src, 913 &set_act->set_ip6_tc_hl_fl, extack); 914 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 915 return nfp_fl_set_tport(act, offset, &set_act->set_tport, 916 NFP_FL_ACTION_OPCODE_SET_TCP, extack); 917 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 918 return nfp_fl_set_tport(act, offset, &set_act->set_tport, 919 NFP_FL_ACTION_OPCODE_SET_UDP, extack); 920 default: 921 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported header"); 922 return -EOPNOTSUPP; 923 } 924 } 925 926 static struct nfp_fl_meter *nfp_fl_meter(char *act_data) 927 { 928 size_t act_size = sizeof(struct nfp_fl_meter); 929 struct nfp_fl_meter *meter_act; 930 931 meter_act = (struct nfp_fl_meter *)act_data; 932 933 memset(meter_act, 0, act_size); 934 935 meter_act->head.jump_id = NFP_FL_ACTION_OPCODE_METER; 936 meter_act->head.len_lw = act_size >> NFP_FL_LW_SIZ; 937 938 return meter_act; 939 } 940 941 static int 942 nfp_flower_meter_action(struct nfp_app *app, 943 const struct flow_action_entry *action, 944 struct nfp_fl_payload *nfp_fl, int *a_len, 945 struct net_device *netdev, 946 struct netlink_ext_ack *extack) 947 { 948 struct nfp_fl_meter *fl_meter; 949 u32 meter_id; 950 951 if (*a_len + sizeof(struct nfp_fl_meter) > NFP_FL_MAX_A_SIZ) { 952 NL_SET_ERR_MSG_MOD(extack, 953 "unsupported offload:meter action size beyond the allowed maximum"); 954 return -EOPNOTSUPP; 955 } 956 957 meter_id = action->hw_index; 958 if (!nfp_flower_search_meter_entry(app, meter_id)) { 959 NL_SET_ERR_MSG_MOD(extack, 960 "can not offload flow table with unsupported police action."); 961 return -EOPNOTSUPP; 962 } 963 964 fl_meter = nfp_fl_meter(&nfp_fl->action_data[*a_len]); 965 *a_len += sizeof(struct nfp_fl_meter); 966 fl_meter->meter_id = cpu_to_be32(meter_id); 967 968 return 0; 969 } 970 971 static int 972 nfp_flower_output_action(struct nfp_app *app, 973 const struct flow_action_entry *act, 974 struct nfp_fl_payload *nfp_fl, int *a_len, 975 struct net_device *netdev, bool last, 976 enum nfp_flower_tun_type *tun_type, int *tun_out_cnt, 977 int *out_cnt, u32 *csum_updated, bool pkt_host, 978 struct netlink_ext_ack *extack) 979 { 980 struct nfp_flower_priv *priv = app->priv; 981 struct nfp_fl_output *output; 982 int err, prelag_size; 983 984 /* If csum_updated has not been reset by now, it means HW will 985 * incorrectly update csums when they are not requested. 986 */ 987 if (*csum_updated) { 988 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: set actions without updating checksums are not supported"); 989 return -EOPNOTSUPP; 990 } 991 992 if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ) { 993 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: mirred output increases action list size beyond the allowed maximum"); 994 return -EOPNOTSUPP; 995 } 996 997 output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len]; 998 err = nfp_fl_output(app, output, act, nfp_fl, last, netdev, *tun_type, 999 tun_out_cnt, pkt_host, extack); 1000 if (err) 1001 return err; 1002 1003 *a_len += sizeof(struct nfp_fl_output); 1004 1005 if (priv->flower_en_feats & NFP_FL_ENABLE_LAG) { 1006 /* nfp_fl_pre_lag returns -err or size of prelag action added. 1007 * This will be 0 if it is not egressing to a lag dev. 1008 */ 1009 prelag_size = nfp_fl_pre_lag(app, act, nfp_fl, *a_len, extack); 1010 if (prelag_size < 0) { 1011 return prelag_size; 1012 } else if (prelag_size > 0 && (!last || *out_cnt)) { 1013 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: LAG action has to be last action in action list"); 1014 return -EOPNOTSUPP; 1015 } 1016 1017 *a_len += prelag_size; 1018 } 1019 (*out_cnt)++; 1020 1021 return 0; 1022 } 1023 1024 static int 1025 nfp_flower_loop_action(struct nfp_app *app, const struct flow_action_entry *act, 1026 struct flow_rule *rule, 1027 struct nfp_fl_payload *nfp_fl, int *a_len, 1028 struct net_device *netdev, 1029 enum nfp_flower_tun_type *tun_type, int *tun_out_cnt, 1030 int *out_cnt, u32 *csum_updated, 1031 struct nfp_flower_pedit_acts *set_act, bool *pkt_host, 1032 struct netlink_ext_ack *extack, int act_idx) 1033 { 1034 struct nfp_flower_priv *fl_priv = app->priv; 1035 struct nfp_fl_pre_tunnel *pre_tun; 1036 struct nfp_fl_set_tun *set_tun; 1037 struct nfp_fl_push_vlan *psh_v; 1038 struct nfp_fl_push_mpls *psh_m; 1039 struct nfp_fl_pop_vlan *pop_v; 1040 struct nfp_fl_pop_mpls *pop_m; 1041 struct nfp_fl_set_mpls *set_m; 1042 int err; 1043 1044 switch (act->id) { 1045 case FLOW_ACTION_DROP: 1046 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP); 1047 break; 1048 case FLOW_ACTION_REDIRECT_INGRESS: 1049 case FLOW_ACTION_REDIRECT: 1050 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev, 1051 true, tun_type, tun_out_cnt, 1052 out_cnt, csum_updated, *pkt_host, 1053 extack); 1054 if (err) 1055 return err; 1056 break; 1057 case FLOW_ACTION_MIRRED_INGRESS: 1058 case FLOW_ACTION_MIRRED: 1059 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev, 1060 false, tun_type, tun_out_cnt, 1061 out_cnt, csum_updated, *pkt_host, 1062 extack); 1063 if (err) 1064 return err; 1065 break; 1066 case FLOW_ACTION_VLAN_POP: 1067 if (*a_len + 1068 sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ) { 1069 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop vlan"); 1070 return -EOPNOTSUPP; 1071 } 1072 1073 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len]; 1074 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV); 1075 1076 nfp_fl_pop_vlan(pop_v); 1077 *a_len += sizeof(struct nfp_fl_pop_vlan); 1078 break; 1079 case FLOW_ACTION_VLAN_PUSH: 1080 if (*a_len + 1081 sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ) { 1082 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push vlan"); 1083 return -EOPNOTSUPP; 1084 } 1085 1086 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len]; 1087 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1088 1089 nfp_fl_push_vlan(psh_v, act); 1090 *a_len += sizeof(struct nfp_fl_push_vlan); 1091 break; 1092 case FLOW_ACTION_TUNNEL_ENCAP: { 1093 const struct ip_tunnel_info *ip_tun = act->tunnel; 1094 1095 *tun_type = nfp_fl_get_tun_from_act(app, rule, act, act_idx); 1096 if (*tun_type == NFP_FL_TUNNEL_NONE) { 1097 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel type in action list"); 1098 return -EOPNOTSUPP; 1099 } 1100 1101 if (ip_tun->mode & ~NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS) { 1102 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel flags in action list"); 1103 return -EOPNOTSUPP; 1104 } 1105 1106 /* Pre-tunnel action is required for tunnel encap. 1107 * This checks for next hop entries on NFP. 1108 * If none, the packet falls back before applying other actions. 1109 */ 1110 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) + 1111 sizeof(struct nfp_fl_set_tun) > NFP_FL_MAX_A_SIZ) { 1112 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at tunnel encap"); 1113 return -EOPNOTSUPP; 1114 } 1115 1116 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len); 1117 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1118 *a_len += sizeof(struct nfp_fl_pre_tunnel); 1119 1120 err = nfp_fl_push_geneve_options(nfp_fl, a_len, act, extack); 1121 if (err) 1122 return err; 1123 1124 set_tun = (void *)&nfp_fl->action_data[*a_len]; 1125 err = nfp_fl_set_tun(app, set_tun, act, pre_tun, *tun_type, 1126 netdev, extack); 1127 if (err) 1128 return err; 1129 *a_len += sizeof(struct nfp_fl_set_tun); 1130 } 1131 break; 1132 case FLOW_ACTION_TUNNEL_DECAP: 1133 /* Tunnel decap is handled by default so accept action. */ 1134 return 0; 1135 case FLOW_ACTION_MANGLE: 1136 if (nfp_fl_pedit(act, &nfp_fl->action_data[*a_len], 1137 a_len, csum_updated, set_act, extack)) 1138 return -EOPNOTSUPP; 1139 break; 1140 case FLOW_ACTION_CSUM: 1141 /* csum action requests recalc of something we have not fixed */ 1142 if (act->csum_flags & ~*csum_updated) { 1143 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported csum update action in action list"); 1144 return -EOPNOTSUPP; 1145 } 1146 /* If we will correctly fix the csum we can remove it from the 1147 * csum update list. Which will later be used to check support. 1148 */ 1149 *csum_updated &= ~act->csum_flags; 1150 break; 1151 case FLOW_ACTION_MPLS_PUSH: 1152 if (*a_len + 1153 sizeof(struct nfp_fl_push_mpls) > NFP_FL_MAX_A_SIZ) { 1154 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push MPLS"); 1155 return -EOPNOTSUPP; 1156 } 1157 1158 psh_m = (struct nfp_fl_push_mpls *)&nfp_fl->action_data[*a_len]; 1159 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1160 1161 err = nfp_fl_push_mpls(psh_m, act, extack); 1162 if (err) 1163 return err; 1164 *a_len += sizeof(struct nfp_fl_push_mpls); 1165 break; 1166 case FLOW_ACTION_MPLS_POP: 1167 if (*a_len + 1168 sizeof(struct nfp_fl_pop_mpls) > NFP_FL_MAX_A_SIZ) { 1169 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop MPLS"); 1170 return -EOPNOTSUPP; 1171 } 1172 1173 pop_m = (struct nfp_fl_pop_mpls *)&nfp_fl->action_data[*a_len]; 1174 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1175 1176 nfp_fl_pop_mpls(pop_m, act); 1177 *a_len += sizeof(struct nfp_fl_pop_mpls); 1178 break; 1179 case FLOW_ACTION_MPLS_MANGLE: 1180 if (*a_len + 1181 sizeof(struct nfp_fl_set_mpls) > NFP_FL_MAX_A_SIZ) { 1182 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at set MPLS"); 1183 return -EOPNOTSUPP; 1184 } 1185 1186 set_m = (struct nfp_fl_set_mpls *)&nfp_fl->action_data[*a_len]; 1187 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1188 1189 nfp_fl_set_mpls(set_m, act); 1190 *a_len += sizeof(struct nfp_fl_set_mpls); 1191 break; 1192 case FLOW_ACTION_PTYPE: 1193 /* TC ptype skbedit sets PACKET_HOST for ingress redirect. */ 1194 if (act->ptype != PACKET_HOST) 1195 return -EOPNOTSUPP; 1196 1197 *pkt_host = true; 1198 break; 1199 case FLOW_ACTION_POLICE: 1200 if (!(fl_priv->flower_ext_feats & NFP_FL_FEATS_QOS_METER)) { 1201 NL_SET_ERR_MSG_MOD(extack, 1202 "unsupported offload: unsupported police action in action list"); 1203 return -EOPNOTSUPP; 1204 } 1205 1206 err = nfp_flower_meter_action(app, act, nfp_fl, a_len, netdev, 1207 extack); 1208 if (err) 1209 return err; 1210 break; 1211 default: 1212 /* Currently we do not handle any other actions. */ 1213 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported action in action list"); 1214 return -EOPNOTSUPP; 1215 } 1216 1217 return 0; 1218 } 1219 1220 static bool nfp_fl_check_mangle_start(struct flow_action *flow_act, 1221 int current_act_idx) 1222 { 1223 struct flow_action_entry current_act; 1224 struct flow_action_entry prev_act; 1225 1226 current_act = flow_act->entries[current_act_idx]; 1227 if (current_act.id != FLOW_ACTION_MANGLE) 1228 return false; 1229 1230 if (current_act_idx == 0) 1231 return true; 1232 1233 prev_act = flow_act->entries[current_act_idx - 1]; 1234 1235 return prev_act.id != FLOW_ACTION_MANGLE; 1236 } 1237 1238 static bool nfp_fl_check_mangle_end(struct flow_action *flow_act, 1239 int current_act_idx) 1240 { 1241 struct flow_action_entry current_act; 1242 struct flow_action_entry next_act; 1243 1244 current_act = flow_act->entries[current_act_idx]; 1245 if (current_act.id != FLOW_ACTION_MANGLE) 1246 return false; 1247 1248 if (current_act_idx == flow_act->num_entries) 1249 return true; 1250 1251 next_act = flow_act->entries[current_act_idx + 1]; 1252 1253 return next_act.id != FLOW_ACTION_MANGLE; 1254 } 1255 1256 int nfp_flower_compile_action(struct nfp_app *app, 1257 struct flow_rule *rule, 1258 struct net_device *netdev, 1259 struct nfp_fl_payload *nfp_flow, 1260 struct netlink_ext_ack *extack) 1261 { 1262 int act_len, act_cnt, err, tun_out_cnt, out_cnt, i; 1263 struct nfp_flower_pedit_acts set_act; 1264 enum nfp_flower_tun_type tun_type; 1265 struct flow_action_entry *act; 1266 bool pkt_host = false; 1267 u32 csum_updated = 0; 1268 1269 if (!flow_action_hw_stats_check(&rule->action, extack, 1270 FLOW_ACTION_HW_STATS_DELAYED_BIT)) 1271 return -EOPNOTSUPP; 1272 1273 memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ); 1274 nfp_flow->meta.act_len = 0; 1275 tun_type = NFP_FL_TUNNEL_NONE; 1276 act_len = 0; 1277 act_cnt = 0; 1278 tun_out_cnt = 0; 1279 out_cnt = 0; 1280 1281 flow_action_for_each(i, act, &rule->action) { 1282 if (nfp_fl_check_mangle_start(&rule->action, i)) 1283 memset(&set_act, 0, sizeof(set_act)); 1284 err = nfp_flower_loop_action(app, act, rule, nfp_flow, &act_len, 1285 netdev, &tun_type, &tun_out_cnt, 1286 &out_cnt, &csum_updated, 1287 &set_act, &pkt_host, extack, i); 1288 if (err) 1289 return err; 1290 act_cnt++; 1291 if (nfp_fl_check_mangle_end(&rule->action, i)) 1292 nfp_fl_commit_mangle(rule, 1293 &nfp_flow->action_data[act_len], 1294 &act_len, &set_act, &csum_updated); 1295 } 1296 1297 /* We optimise when the action list is small, this can unfortunately 1298 * not happen once we have more than one action in the action list. 1299 */ 1300 if (act_cnt > 1) 1301 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1302 1303 nfp_flow->meta.act_len = act_len; 1304 1305 return 0; 1306 } 1307