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 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 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules not supported in loaded firmware"); 225 return -EOPNOTSUPP; 226 } 227 228 if (nfp_flow->pre_tun_rule.dev || !pkt_host) { 229 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules require single egress dev and ptype HOST action"); 230 return -EOPNOTSUPP; 231 } 232 233 nfp_flow->pre_tun_rule.dev = out_dev; 234 235 return 0; 236 } else { 237 /* Set action output parameters. */ 238 output->flags = cpu_to_be16(tmp_flags); 239 240 if (nfp_netdev_is_nfp_repr(in_dev)) { 241 /* Confirm ingress and egress are on same device. */ 242 if (!netdev_port_same_parent_id(in_dev, out_dev)) { 243 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ingress and egress interfaces are on different devices"); 244 return -EOPNOTSUPP; 245 } 246 } 247 248 if (!nfp_netdev_is_nfp_repr(out_dev)) { 249 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: egress interface is not an nfp port"); 250 return -EOPNOTSUPP; 251 } 252 253 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev)); 254 if (!output->port) { 255 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid port id for egress interface"); 256 return -EOPNOTSUPP; 257 } 258 } 259 nfp_flow->meta.shortcut = output->port; 260 261 return 0; 262 } 263 264 static bool 265 nfp_flower_tun_is_gre(struct flow_rule *rule, int start_idx) 266 { 267 struct flow_action_entry *act = rule->action.entries; 268 int num_act = rule->action.num_entries; 269 int act_idx; 270 271 /* Preparse action list for next mirred or redirect action */ 272 for (act_idx = start_idx + 1; act_idx < num_act; act_idx++) 273 if (act[act_idx].id == FLOW_ACTION_REDIRECT || 274 act[act_idx].id == FLOW_ACTION_MIRRED) 275 return netif_is_gretap(act[act_idx].dev) || 276 netif_is_ip6gretap(act[act_idx].dev); 277 278 return false; 279 } 280 281 static enum nfp_flower_tun_type 282 nfp_fl_get_tun_from_act(struct nfp_app *app, 283 struct flow_rule *rule, 284 const struct flow_action_entry *act, int act_idx) 285 { 286 const struct ip_tunnel_info *tun = act->tunnel; 287 struct nfp_flower_priv *priv = app->priv; 288 289 /* Determine the tunnel type based on the egress netdev 290 * in the mirred action for tunnels without l4. 291 */ 292 if (nfp_flower_tun_is_gre(rule, act_idx)) 293 return NFP_FL_TUNNEL_GRE; 294 295 switch (tun->key.tp_dst) { 296 case htons(IANA_VXLAN_UDP_PORT): 297 return NFP_FL_TUNNEL_VXLAN; 298 case htons(GENEVE_UDP_PORT): 299 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE) 300 return NFP_FL_TUNNEL_GENEVE; 301 fallthrough; 302 default: 303 return NFP_FL_TUNNEL_NONE; 304 } 305 } 306 307 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len) 308 { 309 size_t act_size = sizeof(struct nfp_fl_pre_tunnel); 310 struct nfp_fl_pre_tunnel *pre_tun_act; 311 312 /* Pre_tunnel action must be first on action list. 313 * If other actions already exist they need to be pushed forward. 314 */ 315 if (act_len) 316 memmove(act_data + act_size, act_data, act_len); 317 318 pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data; 319 320 memset(pre_tun_act, 0, act_size); 321 322 pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL; 323 pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ; 324 325 return pre_tun_act; 326 } 327 328 static int 329 nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len, 330 const struct flow_action_entry *act, 331 struct netlink_ext_ack *extack) 332 { 333 struct ip_tunnel_info *ip_tun = (struct ip_tunnel_info *)act->tunnel; 334 int opt_len, opt_cnt, act_start, tot_push_len; 335 u8 *src = ip_tunnel_info_opts(ip_tun); 336 337 /* We need to populate the options in reverse order for HW. 338 * Therefore we go through the options, calculating the 339 * number of options and the total size, then we populate 340 * them in reverse order in the action list. 341 */ 342 opt_cnt = 0; 343 tot_push_len = 0; 344 opt_len = ip_tun->options_len; 345 while (opt_len > 0) { 346 struct geneve_opt *opt = (struct geneve_opt *)src; 347 348 opt_cnt++; 349 if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT) { 350 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed number of geneve options exceeded"); 351 return -EOPNOTSUPP; 352 } 353 354 tot_push_len += sizeof(struct nfp_fl_push_geneve) + 355 opt->length * 4; 356 if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT) { 357 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options"); 358 return -EOPNOTSUPP; 359 } 360 361 opt_len -= sizeof(struct geneve_opt) + opt->length * 4; 362 src += sizeof(struct geneve_opt) + opt->length * 4; 363 } 364 365 if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ) { 366 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options"); 367 return -EOPNOTSUPP; 368 } 369 370 act_start = *list_len; 371 *list_len += tot_push_len; 372 src = ip_tunnel_info_opts(ip_tun); 373 while (opt_cnt) { 374 struct geneve_opt *opt = (struct geneve_opt *)src; 375 struct nfp_fl_push_geneve *push; 376 size_t act_size, len; 377 378 opt_cnt--; 379 act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4; 380 tot_push_len -= act_size; 381 len = act_start + tot_push_len; 382 383 push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len]; 384 push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE; 385 push->head.len_lw = act_size >> NFP_FL_LW_SIZ; 386 push->reserved = 0; 387 push->class = opt->opt_class; 388 push->type = opt->type; 389 push->length = opt->length; 390 memcpy(&push->opt_data, opt->opt_data, opt->length * 4); 391 392 src += sizeof(struct geneve_opt) + opt->length * 4; 393 } 394 395 return 0; 396 } 397 398 static int 399 nfp_fl_set_tun(struct nfp_app *app, struct nfp_fl_set_tun *set_tun, 400 const struct flow_action_entry *act, 401 struct nfp_fl_pre_tunnel *pre_tun, 402 enum nfp_flower_tun_type tun_type, 403 struct net_device *netdev, struct netlink_ext_ack *extack) 404 { 405 const struct ip_tunnel_info *ip_tun = act->tunnel; 406 bool ipv6 = ip_tunnel_info_af(ip_tun) == AF_INET6; 407 size_t act_size = sizeof(struct nfp_fl_set_tun); 408 struct nfp_flower_priv *priv = app->priv; 409 u32 tmp_set_ip_tun_type_index = 0; 410 /* Currently support one pre-tunnel so index is always 0. */ 411 int pretun_idx = 0; 412 413 if (!IS_ENABLED(CONFIG_IPV6) && ipv6) 414 return -EOPNOTSUPP; 415 416 if (ipv6 && !(priv->flower_ext_feats & NFP_FL_FEATS_IPV6_TUN)) 417 return -EOPNOTSUPP; 418 419 BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM || 420 NFP_FL_TUNNEL_KEY != TUNNEL_KEY || 421 NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT); 422 if (ip_tun->options_len && 423 (tun_type != NFP_FL_TUNNEL_GENEVE || 424 !(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT))) { 425 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve options offload"); 426 return -EOPNOTSUPP; 427 } 428 429 set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_TUNNEL; 430 set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ; 431 432 /* Set tunnel type and pre-tunnel index. */ 433 tmp_set_ip_tun_type_index |= 434 FIELD_PREP(NFP_FL_TUNNEL_TYPE, tun_type) | 435 FIELD_PREP(NFP_FL_PRE_TUN_INDEX, pretun_idx); 436 437 set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index); 438 set_tun->tun_id = ip_tun->key.tun_id; 439 440 if (ip_tun->key.ttl) { 441 set_tun->ttl = ip_tun->key.ttl; 442 #ifdef CONFIG_IPV6 443 } else if (ipv6) { 444 struct net *net = dev_net(netdev); 445 struct flowi6 flow = {}; 446 struct dst_entry *dst; 447 448 flow.daddr = ip_tun->key.u.ipv6.dst; 449 flow.flowi4_proto = IPPROTO_UDP; 450 dst = ipv6_stub->ipv6_dst_lookup_flow(net, NULL, &flow, NULL); 451 if (!IS_ERR(dst)) { 452 set_tun->ttl = ip6_dst_hoplimit(dst); 453 dst_release(dst); 454 } else { 455 set_tun->ttl = net->ipv6.devconf_all->hop_limit; 456 } 457 #endif 458 } else { 459 struct net *net = dev_net(netdev); 460 struct flowi4 flow = {}; 461 struct rtable *rt; 462 int err; 463 464 /* Do a route lookup to determine ttl - if fails then use 465 * default. Note that CONFIG_INET is a requirement of 466 * CONFIG_NET_SWITCHDEV so must be defined here. 467 */ 468 flow.daddr = ip_tun->key.u.ipv4.dst; 469 flow.flowi4_proto = IPPROTO_UDP; 470 rt = ip_route_output_key(net, &flow); 471 err = PTR_ERR_OR_ZERO(rt); 472 if (!err) { 473 set_tun->ttl = ip4_dst_hoplimit(&rt->dst); 474 ip_rt_put(rt); 475 } else { 476 set_tun->ttl = net->ipv4.sysctl_ip_default_ttl; 477 } 478 } 479 480 set_tun->tos = ip_tun->key.tos; 481 482 if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) || 483 ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_UDP_TUN_FLAGS) { 484 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support tunnel flag offload"); 485 return -EOPNOTSUPP; 486 } 487 set_tun->tun_flags = ip_tun->key.tun_flags; 488 489 if (tun_type == NFP_FL_TUNNEL_GENEVE) { 490 set_tun->tun_proto = htons(ETH_P_TEB); 491 set_tun->tun_len = ip_tun->options_len / 4; 492 } 493 494 /* Complete pre_tunnel action. */ 495 if (ipv6) { 496 pre_tun->flags |= cpu_to_be16(NFP_FL_PRE_TUN_IPV6); 497 pre_tun->ipv6_dst = ip_tun->key.u.ipv6.dst; 498 } else { 499 pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst; 500 } 501 502 return 0; 503 } 504 505 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask) 506 { 507 u32 oldvalue = get_unaligned((u32 *)p_exact); 508 u32 oldmask = get_unaligned((u32 *)p_mask); 509 510 value &= mask; 511 value |= oldvalue & ~mask; 512 513 put_unaligned(oldmask | mask, (u32 *)p_mask); 514 put_unaligned(value, (u32 *)p_exact); 515 } 516 517 static int 518 nfp_fl_set_eth(const struct flow_action_entry *act, u32 off, 519 struct nfp_fl_set_eth *set_eth, struct netlink_ext_ack *extack) 520 { 521 u32 exact, mask; 522 523 if (off + 4 > ETH_ALEN * 2) { 524 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action"); 525 return -EOPNOTSUPP; 526 } 527 528 mask = ~act->mangle.mask; 529 exact = act->mangle.val; 530 531 if (exact & ~mask) { 532 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action"); 533 return -EOPNOTSUPP; 534 } 535 536 nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off], 537 &set_eth->eth_addr_mask[off]); 538 539 set_eth->reserved = cpu_to_be16(0); 540 set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET; 541 set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ; 542 543 return 0; 544 } 545 546 struct ipv4_ttl_word { 547 __u8 ttl; 548 __u8 protocol; 549 __sum16 check; 550 }; 551 552 static int 553 nfp_fl_set_ip4(const struct flow_action_entry *act, u32 off, 554 struct nfp_fl_set_ip4_addrs *set_ip_addr, 555 struct nfp_fl_set_ip4_ttl_tos *set_ip_ttl_tos, 556 struct netlink_ext_ack *extack) 557 { 558 struct ipv4_ttl_word *ttl_word_mask; 559 struct ipv4_ttl_word *ttl_word; 560 struct iphdr *tos_word_mask; 561 struct iphdr *tos_word; 562 __be32 exact, mask; 563 564 /* We are expecting tcf_pedit to return a big endian value */ 565 mask = (__force __be32)~act->mangle.mask; 566 exact = (__force __be32)act->mangle.val; 567 568 if (exact & ~mask) { 569 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 action"); 570 return -EOPNOTSUPP; 571 } 572 573 switch (off) { 574 case offsetof(struct iphdr, daddr): 575 set_ip_addr->ipv4_dst_mask |= mask; 576 set_ip_addr->ipv4_dst &= ~mask; 577 set_ip_addr->ipv4_dst |= exact & mask; 578 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS; 579 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> 580 NFP_FL_LW_SIZ; 581 break; 582 case offsetof(struct iphdr, saddr): 583 set_ip_addr->ipv4_src_mask |= mask; 584 set_ip_addr->ipv4_src &= ~mask; 585 set_ip_addr->ipv4_src |= exact & mask; 586 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS; 587 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> 588 NFP_FL_LW_SIZ; 589 break; 590 case offsetof(struct iphdr, ttl): 591 ttl_word_mask = (struct ipv4_ttl_word *)&mask; 592 ttl_word = (struct ipv4_ttl_word *)&exact; 593 594 if (ttl_word_mask->protocol || ttl_word_mask->check) { 595 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 ttl action"); 596 return -EOPNOTSUPP; 597 } 598 599 set_ip_ttl_tos->ipv4_ttl_mask |= ttl_word_mask->ttl; 600 set_ip_ttl_tos->ipv4_ttl &= ~ttl_word_mask->ttl; 601 set_ip_ttl_tos->ipv4_ttl |= ttl_word->ttl & ttl_word_mask->ttl; 602 set_ip_ttl_tos->head.jump_id = 603 NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS; 604 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >> 605 NFP_FL_LW_SIZ; 606 break; 607 case round_down(offsetof(struct iphdr, tos), 4): 608 tos_word_mask = (struct iphdr *)&mask; 609 tos_word = (struct iphdr *)&exact; 610 611 if (tos_word_mask->version || tos_word_mask->ihl || 612 tos_word_mask->tot_len) { 613 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 tos action"); 614 return -EOPNOTSUPP; 615 } 616 617 set_ip_ttl_tos->ipv4_tos_mask |= tos_word_mask->tos; 618 set_ip_ttl_tos->ipv4_tos &= ~tos_word_mask->tos; 619 set_ip_ttl_tos->ipv4_tos |= tos_word->tos & tos_word_mask->tos; 620 set_ip_ttl_tos->head.jump_id = 621 NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS; 622 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >> 623 NFP_FL_LW_SIZ; 624 break; 625 default: 626 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv4 header"); 627 return -EOPNOTSUPP; 628 } 629 630 return 0; 631 } 632 633 static void 634 nfp_fl_set_ip6_helper(int opcode_tag, u8 word, __be32 exact, __be32 mask, 635 struct nfp_fl_set_ipv6_addr *ip6) 636 { 637 ip6->ipv6[word].mask |= mask; 638 ip6->ipv6[word].exact &= ~mask; 639 ip6->ipv6[word].exact |= exact & mask; 640 641 ip6->reserved = cpu_to_be16(0); 642 ip6->head.jump_id = opcode_tag; 643 ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ; 644 } 645 646 struct ipv6_hop_limit_word { 647 __be16 payload_len; 648 u8 nexthdr; 649 u8 hop_limit; 650 }; 651 652 static int 653 nfp_fl_set_ip6_hop_limit_flow_label(u32 off, __be32 exact, __be32 mask, 654 struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl, 655 struct netlink_ext_ack *extack) 656 { 657 struct ipv6_hop_limit_word *fl_hl_mask; 658 struct ipv6_hop_limit_word *fl_hl; 659 660 switch (off) { 661 case offsetof(struct ipv6hdr, payload_len): 662 fl_hl_mask = (struct ipv6_hop_limit_word *)&mask; 663 fl_hl = (struct ipv6_hop_limit_word *)&exact; 664 665 if (fl_hl_mask->nexthdr || fl_hl_mask->payload_len) { 666 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 hop limit action"); 667 return -EOPNOTSUPP; 668 } 669 670 ip_hl_fl->ipv6_hop_limit_mask |= fl_hl_mask->hop_limit; 671 ip_hl_fl->ipv6_hop_limit &= ~fl_hl_mask->hop_limit; 672 ip_hl_fl->ipv6_hop_limit |= fl_hl->hop_limit & 673 fl_hl_mask->hop_limit; 674 break; 675 case round_down(offsetof(struct ipv6hdr, flow_lbl), 4): 676 if (mask & ~IPV6_FLOW_LABEL_MASK || 677 exact & ~IPV6_FLOW_LABEL_MASK) { 678 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 flow label action"); 679 return -EOPNOTSUPP; 680 } 681 682 ip_hl_fl->ipv6_label_mask |= mask; 683 ip_hl_fl->ipv6_label &= ~mask; 684 ip_hl_fl->ipv6_label |= exact & mask; 685 break; 686 } 687 688 ip_hl_fl->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV6_TC_HL_FL; 689 ip_hl_fl->head.len_lw = sizeof(*ip_hl_fl) >> NFP_FL_LW_SIZ; 690 691 return 0; 692 } 693 694 static int 695 nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off, 696 struct nfp_fl_set_ipv6_addr *ip_dst, 697 struct nfp_fl_set_ipv6_addr *ip_src, 698 struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl, 699 struct netlink_ext_ack *extack) 700 { 701 __be32 exact, mask; 702 int err = 0; 703 u8 word; 704 705 /* We are expecting tcf_pedit to return a big endian value */ 706 mask = (__force __be32)~act->mangle.mask; 707 exact = (__force __be32)act->mangle.val; 708 709 if (exact & ~mask) { 710 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 action"); 711 return -EOPNOTSUPP; 712 } 713 714 if (off < offsetof(struct ipv6hdr, saddr)) { 715 err = nfp_fl_set_ip6_hop_limit_flow_label(off, exact, mask, 716 ip_hl_fl, extack); 717 } else if (off < offsetof(struct ipv6hdr, daddr)) { 718 word = (off - offsetof(struct ipv6hdr, saddr)) / sizeof(exact); 719 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, word, 720 exact, mask, ip_src); 721 } else if (off < offsetof(struct ipv6hdr, daddr) + 722 sizeof(struct in6_addr)) { 723 word = (off - offsetof(struct ipv6hdr, daddr)) / sizeof(exact); 724 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, word, 725 exact, mask, ip_dst); 726 } else { 727 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv6 header"); 728 return -EOPNOTSUPP; 729 } 730 731 return err; 732 } 733 734 static int 735 nfp_fl_set_tport(const struct flow_action_entry *act, u32 off, 736 struct nfp_fl_set_tport *set_tport, int opcode, 737 struct netlink_ext_ack *extack) 738 { 739 u32 exact, mask; 740 741 if (off) { 742 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of L4 header"); 743 return -EOPNOTSUPP; 744 } 745 746 mask = ~act->mangle.mask; 747 exact = act->mangle.val; 748 749 if (exact & ~mask) { 750 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit L4 action"); 751 return -EOPNOTSUPP; 752 } 753 754 nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val, 755 set_tport->tp_port_mask); 756 757 set_tport->reserved = cpu_to_be16(0); 758 set_tport->head.jump_id = opcode; 759 set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ; 760 761 return 0; 762 } 763 764 static u32 nfp_fl_csum_l4_to_flag(u8 ip_proto) 765 { 766 switch (ip_proto) { 767 case 0: 768 /* Filter doesn't force proto match, 769 * both TCP and UDP will be updated if encountered 770 */ 771 return TCA_CSUM_UPDATE_FLAG_TCP | TCA_CSUM_UPDATE_FLAG_UDP; 772 case IPPROTO_TCP: 773 return TCA_CSUM_UPDATE_FLAG_TCP; 774 case IPPROTO_UDP: 775 return TCA_CSUM_UPDATE_FLAG_UDP; 776 default: 777 /* All other protocols will be ignored by FW */ 778 return 0; 779 } 780 } 781 782 struct nfp_flower_pedit_acts { 783 struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src; 784 struct nfp_fl_set_ipv6_tc_hl_fl set_ip6_tc_hl_fl; 785 struct nfp_fl_set_ip4_ttl_tos set_ip_ttl_tos; 786 struct nfp_fl_set_ip4_addrs set_ip_addr; 787 struct nfp_fl_set_tport set_tport; 788 struct nfp_fl_set_eth set_eth; 789 }; 790 791 static int 792 nfp_fl_commit_mangle(struct flow_rule *rule, char *nfp_action, 793 int *a_len, struct nfp_flower_pedit_acts *set_act, 794 u32 *csum_updated) 795 { 796 size_t act_size = 0; 797 u8 ip_proto = 0; 798 799 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 800 struct flow_match_basic match; 801 802 flow_rule_match_basic(rule, &match); 803 ip_proto = match.key->ip_proto; 804 } 805 806 if (set_act->set_eth.head.len_lw) { 807 act_size = sizeof(set_act->set_eth); 808 memcpy(nfp_action, &set_act->set_eth, act_size); 809 *a_len += act_size; 810 } 811 812 if (set_act->set_ip_ttl_tos.head.len_lw) { 813 nfp_action += act_size; 814 act_size = sizeof(set_act->set_ip_ttl_tos); 815 memcpy(nfp_action, &set_act->set_ip_ttl_tos, act_size); 816 *a_len += act_size; 817 818 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */ 819 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR | 820 nfp_fl_csum_l4_to_flag(ip_proto); 821 } 822 823 if (set_act->set_ip_addr.head.len_lw) { 824 nfp_action += act_size; 825 act_size = sizeof(set_act->set_ip_addr); 826 memcpy(nfp_action, &set_act->set_ip_addr, act_size); 827 *a_len += act_size; 828 829 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */ 830 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR | 831 nfp_fl_csum_l4_to_flag(ip_proto); 832 } 833 834 if (set_act->set_ip6_tc_hl_fl.head.len_lw) { 835 nfp_action += act_size; 836 act_size = sizeof(set_act->set_ip6_tc_hl_fl); 837 memcpy(nfp_action, &set_act->set_ip6_tc_hl_fl, act_size); 838 *a_len += act_size; 839 840 /* Hardware will automatically fix TCP/UDP checksum. */ 841 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 842 } 843 844 if (set_act->set_ip6_dst.head.len_lw && 845 set_act->set_ip6_src.head.len_lw) { 846 /* TC compiles set src and dst IPv6 address as a single action, 847 * the hardware requires this to be 2 separate actions. 848 */ 849 nfp_action += act_size; 850 act_size = sizeof(set_act->set_ip6_src); 851 memcpy(nfp_action, &set_act->set_ip6_src, act_size); 852 *a_len += act_size; 853 854 act_size = sizeof(set_act->set_ip6_dst); 855 memcpy(&nfp_action[sizeof(set_act->set_ip6_src)], 856 &set_act->set_ip6_dst, act_size); 857 *a_len += act_size; 858 859 /* Hardware will automatically fix TCP/UDP checksum. */ 860 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 861 } else if (set_act->set_ip6_dst.head.len_lw) { 862 nfp_action += act_size; 863 act_size = sizeof(set_act->set_ip6_dst); 864 memcpy(nfp_action, &set_act->set_ip6_dst, act_size); 865 *a_len += act_size; 866 867 /* Hardware will automatically fix TCP/UDP checksum. */ 868 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 869 } else if (set_act->set_ip6_src.head.len_lw) { 870 nfp_action += act_size; 871 act_size = sizeof(set_act->set_ip6_src); 872 memcpy(nfp_action, &set_act->set_ip6_src, act_size); 873 *a_len += act_size; 874 875 /* Hardware will automatically fix TCP/UDP checksum. */ 876 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 877 } 878 if (set_act->set_tport.head.len_lw) { 879 nfp_action += act_size; 880 act_size = sizeof(set_act->set_tport); 881 memcpy(nfp_action, &set_act->set_tport, act_size); 882 *a_len += act_size; 883 884 /* Hardware will automatically fix TCP/UDP checksum. */ 885 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto); 886 } 887 888 return 0; 889 } 890 891 static int 892 nfp_fl_pedit(const struct flow_action_entry *act, 893 char *nfp_action, int *a_len, 894 u32 *csum_updated, struct nfp_flower_pedit_acts *set_act, 895 struct netlink_ext_ack *extack) 896 { 897 enum flow_action_mangle_base htype; 898 u32 offset; 899 900 htype = act->mangle.htype; 901 offset = act->mangle.offset; 902 903 switch (htype) { 904 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 905 return nfp_fl_set_eth(act, offset, &set_act->set_eth, extack); 906 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 907 return nfp_fl_set_ip4(act, offset, &set_act->set_ip_addr, 908 &set_act->set_ip_ttl_tos, extack); 909 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 910 return nfp_fl_set_ip6(act, offset, &set_act->set_ip6_dst, 911 &set_act->set_ip6_src, 912 &set_act->set_ip6_tc_hl_fl, extack); 913 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 914 return nfp_fl_set_tport(act, offset, &set_act->set_tport, 915 NFP_FL_ACTION_OPCODE_SET_TCP, extack); 916 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 917 return nfp_fl_set_tport(act, offset, &set_act->set_tport, 918 NFP_FL_ACTION_OPCODE_SET_UDP, extack); 919 default: 920 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported header"); 921 return -EOPNOTSUPP; 922 } 923 } 924 925 static struct nfp_fl_meter *nfp_fl_meter(char *act_data) 926 { 927 size_t act_size = sizeof(struct nfp_fl_meter); 928 struct nfp_fl_meter *meter_act; 929 930 meter_act = (struct nfp_fl_meter *)act_data; 931 932 memset(meter_act, 0, act_size); 933 934 meter_act->head.jump_id = NFP_FL_ACTION_OPCODE_METER; 935 meter_act->head.len_lw = act_size >> NFP_FL_LW_SIZ; 936 937 return meter_act; 938 } 939 940 static int 941 nfp_flower_meter_action(struct nfp_app *app, 942 const struct flow_action_entry *action, 943 struct nfp_fl_payload *nfp_fl, int *a_len, 944 struct net_device *netdev, 945 struct netlink_ext_ack *extack) 946 { 947 struct nfp_fl_meter *fl_meter; 948 u32 meter_id; 949 950 if (*a_len + sizeof(struct nfp_fl_meter) > NFP_FL_MAX_A_SIZ) { 951 NL_SET_ERR_MSG_MOD(extack, 952 "unsupported offload:meter action size beyond the allowed maximum"); 953 return -EOPNOTSUPP; 954 } 955 956 meter_id = action->hw_index; 957 if (!nfp_flower_search_meter_entry(app, meter_id)) { 958 NL_SET_ERR_MSG_MOD(extack, 959 "can not offload flow table with unsupported police action."); 960 return -EOPNOTSUPP; 961 } 962 963 fl_meter = nfp_fl_meter(&nfp_fl->action_data[*a_len]); 964 *a_len += sizeof(struct nfp_fl_meter); 965 fl_meter->meter_id = cpu_to_be32(meter_id); 966 967 return 0; 968 } 969 970 static int 971 nfp_flower_output_action(struct nfp_app *app, 972 const struct flow_action_entry *act, 973 struct nfp_fl_payload *nfp_fl, int *a_len, 974 struct net_device *netdev, bool last, 975 enum nfp_flower_tun_type *tun_type, int *tun_out_cnt, 976 int *out_cnt, u32 *csum_updated, bool pkt_host, 977 struct netlink_ext_ack *extack) 978 { 979 struct nfp_flower_priv *priv = app->priv; 980 struct nfp_fl_output *output; 981 int err, prelag_size; 982 983 /* If csum_updated has not been reset by now, it means HW will 984 * incorrectly update csums when they are not requested. 985 */ 986 if (*csum_updated) { 987 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: set actions without updating checksums are not supported"); 988 return -EOPNOTSUPP; 989 } 990 991 if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ) { 992 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: mirred output increases action list size beyond the allowed maximum"); 993 return -EOPNOTSUPP; 994 } 995 996 output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len]; 997 err = nfp_fl_output(app, output, act, nfp_fl, last, netdev, *tun_type, 998 tun_out_cnt, pkt_host, extack); 999 if (err) 1000 return err; 1001 1002 *a_len += sizeof(struct nfp_fl_output); 1003 1004 if (priv->flower_en_feats & NFP_FL_ENABLE_LAG) { 1005 /* nfp_fl_pre_lag returns -err or size of prelag action added. 1006 * This will be 0 if it is not egressing to a lag dev. 1007 */ 1008 prelag_size = nfp_fl_pre_lag(app, act, nfp_fl, *a_len, extack); 1009 if (prelag_size < 0) { 1010 return prelag_size; 1011 } else if (prelag_size > 0 && (!last || *out_cnt)) { 1012 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: LAG action has to be last action in action list"); 1013 return -EOPNOTSUPP; 1014 } 1015 1016 *a_len += prelag_size; 1017 } 1018 (*out_cnt)++; 1019 1020 return 0; 1021 } 1022 1023 static int 1024 nfp_flower_loop_action(struct nfp_app *app, const struct flow_action_entry *act, 1025 struct flow_rule *rule, 1026 struct nfp_fl_payload *nfp_fl, int *a_len, 1027 struct net_device *netdev, 1028 enum nfp_flower_tun_type *tun_type, int *tun_out_cnt, 1029 int *out_cnt, u32 *csum_updated, 1030 struct nfp_flower_pedit_acts *set_act, bool *pkt_host, 1031 struct netlink_ext_ack *extack, int act_idx) 1032 { 1033 struct nfp_flower_priv *fl_priv = app->priv; 1034 struct nfp_fl_pre_tunnel *pre_tun; 1035 struct nfp_fl_set_tun *set_tun; 1036 struct nfp_fl_push_vlan *psh_v; 1037 struct nfp_fl_push_mpls *psh_m; 1038 struct nfp_fl_pop_vlan *pop_v; 1039 struct nfp_fl_pop_mpls *pop_m; 1040 struct nfp_fl_set_mpls *set_m; 1041 int err; 1042 1043 switch (act->id) { 1044 case FLOW_ACTION_DROP: 1045 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP); 1046 break; 1047 case FLOW_ACTION_REDIRECT_INGRESS: 1048 case FLOW_ACTION_REDIRECT: 1049 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev, 1050 true, tun_type, tun_out_cnt, 1051 out_cnt, csum_updated, *pkt_host, 1052 extack); 1053 if (err) 1054 return err; 1055 break; 1056 case FLOW_ACTION_MIRRED_INGRESS: 1057 case FLOW_ACTION_MIRRED: 1058 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev, 1059 false, tun_type, tun_out_cnt, 1060 out_cnt, csum_updated, *pkt_host, 1061 extack); 1062 if (err) 1063 return err; 1064 break; 1065 case FLOW_ACTION_VLAN_POP: 1066 if (*a_len + 1067 sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ) { 1068 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop vlan"); 1069 return -EOPNOTSUPP; 1070 } 1071 1072 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len]; 1073 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV); 1074 1075 nfp_fl_pop_vlan(pop_v); 1076 *a_len += sizeof(struct nfp_fl_pop_vlan); 1077 break; 1078 case FLOW_ACTION_VLAN_PUSH: 1079 if (*a_len + 1080 sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ) { 1081 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push vlan"); 1082 return -EOPNOTSUPP; 1083 } 1084 1085 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len]; 1086 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1087 1088 nfp_fl_push_vlan(psh_v, act); 1089 *a_len += sizeof(struct nfp_fl_push_vlan); 1090 break; 1091 case FLOW_ACTION_TUNNEL_ENCAP: { 1092 const struct ip_tunnel_info *ip_tun = act->tunnel; 1093 1094 *tun_type = nfp_fl_get_tun_from_act(app, rule, act, act_idx); 1095 if (*tun_type == NFP_FL_TUNNEL_NONE) { 1096 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel type in action list"); 1097 return -EOPNOTSUPP; 1098 } 1099 1100 if (ip_tun->mode & ~NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS) { 1101 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel flags in action list"); 1102 return -EOPNOTSUPP; 1103 } 1104 1105 /* Pre-tunnel action is required for tunnel encap. 1106 * This checks for next hop entries on NFP. 1107 * If none, the packet falls back before applying other actions. 1108 */ 1109 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) + 1110 sizeof(struct nfp_fl_set_tun) > NFP_FL_MAX_A_SIZ) { 1111 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at tunnel encap"); 1112 return -EOPNOTSUPP; 1113 } 1114 1115 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len); 1116 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1117 *a_len += sizeof(struct nfp_fl_pre_tunnel); 1118 1119 err = nfp_fl_push_geneve_options(nfp_fl, a_len, act, extack); 1120 if (err) 1121 return err; 1122 1123 set_tun = (void *)&nfp_fl->action_data[*a_len]; 1124 err = nfp_fl_set_tun(app, set_tun, act, pre_tun, *tun_type, 1125 netdev, extack); 1126 if (err) 1127 return err; 1128 *a_len += sizeof(struct nfp_fl_set_tun); 1129 } 1130 break; 1131 case FLOW_ACTION_TUNNEL_DECAP: 1132 /* Tunnel decap is handled by default so accept action. */ 1133 return 0; 1134 case FLOW_ACTION_MANGLE: 1135 if (nfp_fl_pedit(act, &nfp_fl->action_data[*a_len], 1136 a_len, csum_updated, set_act, extack)) 1137 return -EOPNOTSUPP; 1138 break; 1139 case FLOW_ACTION_CSUM: 1140 /* csum action requests recalc of something we have not fixed */ 1141 if (act->csum_flags & ~*csum_updated) { 1142 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported csum update action in action list"); 1143 return -EOPNOTSUPP; 1144 } 1145 /* If we will correctly fix the csum we can remove it from the 1146 * csum update list. Which will later be used to check support. 1147 */ 1148 *csum_updated &= ~act->csum_flags; 1149 break; 1150 case FLOW_ACTION_MPLS_PUSH: 1151 if (*a_len + 1152 sizeof(struct nfp_fl_push_mpls) > NFP_FL_MAX_A_SIZ) { 1153 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push MPLS"); 1154 return -EOPNOTSUPP; 1155 } 1156 1157 psh_m = (struct nfp_fl_push_mpls *)&nfp_fl->action_data[*a_len]; 1158 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1159 1160 err = nfp_fl_push_mpls(psh_m, act, extack); 1161 if (err) 1162 return err; 1163 *a_len += sizeof(struct nfp_fl_push_mpls); 1164 break; 1165 case FLOW_ACTION_MPLS_POP: 1166 if (*a_len + 1167 sizeof(struct nfp_fl_pop_mpls) > NFP_FL_MAX_A_SIZ) { 1168 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop MPLS"); 1169 return -EOPNOTSUPP; 1170 } 1171 1172 pop_m = (struct nfp_fl_pop_mpls *)&nfp_fl->action_data[*a_len]; 1173 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1174 1175 nfp_fl_pop_mpls(pop_m, act); 1176 *a_len += sizeof(struct nfp_fl_pop_mpls); 1177 break; 1178 case FLOW_ACTION_MPLS_MANGLE: 1179 if (*a_len + 1180 sizeof(struct nfp_fl_set_mpls) > NFP_FL_MAX_A_SIZ) { 1181 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at set MPLS"); 1182 return -EOPNOTSUPP; 1183 } 1184 1185 set_m = (struct nfp_fl_set_mpls *)&nfp_fl->action_data[*a_len]; 1186 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1187 1188 nfp_fl_set_mpls(set_m, act); 1189 *a_len += sizeof(struct nfp_fl_set_mpls); 1190 break; 1191 case FLOW_ACTION_PTYPE: 1192 /* TC ptype skbedit sets PACKET_HOST for ingress redirect. */ 1193 if (act->ptype != PACKET_HOST) 1194 return -EOPNOTSUPP; 1195 1196 *pkt_host = true; 1197 break; 1198 case FLOW_ACTION_POLICE: 1199 if (!(fl_priv->flower_ext_feats & NFP_FL_FEATS_QOS_METER)) { 1200 NL_SET_ERR_MSG_MOD(extack, 1201 "unsupported offload: unsupported police action in action list"); 1202 return -EOPNOTSUPP; 1203 } 1204 1205 err = nfp_flower_meter_action(app, act, nfp_fl, a_len, netdev, 1206 extack); 1207 if (err) 1208 return err; 1209 break; 1210 default: 1211 /* Currently we do not handle any other actions. */ 1212 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported action in action list"); 1213 return -EOPNOTSUPP; 1214 } 1215 1216 return 0; 1217 } 1218 1219 static bool nfp_fl_check_mangle_start(struct flow_action *flow_act, 1220 int current_act_idx) 1221 { 1222 struct flow_action_entry current_act; 1223 struct flow_action_entry prev_act; 1224 1225 current_act = flow_act->entries[current_act_idx]; 1226 if (current_act.id != FLOW_ACTION_MANGLE) 1227 return false; 1228 1229 if (current_act_idx == 0) 1230 return true; 1231 1232 prev_act = flow_act->entries[current_act_idx - 1]; 1233 1234 return prev_act.id != FLOW_ACTION_MANGLE; 1235 } 1236 1237 static bool nfp_fl_check_mangle_end(struct flow_action *flow_act, 1238 int current_act_idx) 1239 { 1240 struct flow_action_entry current_act; 1241 struct flow_action_entry next_act; 1242 1243 current_act = flow_act->entries[current_act_idx]; 1244 if (current_act.id != FLOW_ACTION_MANGLE) 1245 return false; 1246 1247 if (current_act_idx == flow_act->num_entries) 1248 return true; 1249 1250 next_act = flow_act->entries[current_act_idx + 1]; 1251 1252 return next_act.id != FLOW_ACTION_MANGLE; 1253 } 1254 1255 int nfp_flower_compile_action(struct nfp_app *app, 1256 struct flow_rule *rule, 1257 struct net_device *netdev, 1258 struct nfp_fl_payload *nfp_flow, 1259 struct netlink_ext_ack *extack) 1260 { 1261 int act_len, act_cnt, err, tun_out_cnt, out_cnt, i; 1262 struct nfp_flower_pedit_acts set_act; 1263 enum nfp_flower_tun_type tun_type; 1264 struct flow_action_entry *act; 1265 bool pkt_host = false; 1266 u32 csum_updated = 0; 1267 1268 if (!flow_action_hw_stats_check(&rule->action, extack, 1269 FLOW_ACTION_HW_STATS_DELAYED_BIT)) 1270 return -EOPNOTSUPP; 1271 1272 memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ); 1273 nfp_flow->meta.act_len = 0; 1274 tun_type = NFP_FL_TUNNEL_NONE; 1275 act_len = 0; 1276 act_cnt = 0; 1277 tun_out_cnt = 0; 1278 out_cnt = 0; 1279 1280 flow_action_for_each(i, act, &rule->action) { 1281 if (nfp_fl_check_mangle_start(&rule->action, i)) 1282 memset(&set_act, 0, sizeof(set_act)); 1283 err = nfp_flower_loop_action(app, act, rule, nfp_flow, &act_len, 1284 netdev, &tun_type, &tun_out_cnt, 1285 &out_cnt, &csum_updated, 1286 &set_act, &pkt_host, extack, i); 1287 if (err) 1288 return err; 1289 act_cnt++; 1290 if (nfp_fl_check_mangle_end(&rule->action, i)) 1291 nfp_fl_commit_mangle(rule, 1292 &nfp_flow->action_data[act_len], 1293 &act_len, &set_act, &csum_updated); 1294 } 1295 1296 /* We optimise when the action list is small, this can unfortunately 1297 * not happen once we have more than one action in the action list. 1298 */ 1299 if (act_cnt > 1) 1300 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 1301 1302 nfp_flow->meta.act_len = act_len; 1303 1304 return 0; 1305 } 1306