1 /* 2 * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux. 3 * 4 * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <net/tc_act/tc_mirred.h> 36 #include <net/tc_act/tc_pedit.h> 37 #include <net/tc_act/tc_gact.h> 38 #include <net/tc_act/tc_vlan.h> 39 40 #include "cxgb4.h" 41 #include "cxgb4_filter.h" 42 #include "cxgb4_tc_flower.h" 43 44 #define STATS_CHECK_PERIOD (HZ / 2) 45 46 struct ch_tc_pedit_fields pedits[] = { 47 PEDIT_FIELDS(ETH_, DMAC_31_0, 4, dmac, 0), 48 PEDIT_FIELDS(ETH_, DMAC_47_32, 2, dmac, 4), 49 PEDIT_FIELDS(ETH_, SMAC_15_0, 2, smac, 0), 50 PEDIT_FIELDS(ETH_, SMAC_47_16, 4, smac, 2), 51 PEDIT_FIELDS(IP4_, SRC, 4, nat_fip, 0), 52 PEDIT_FIELDS(IP4_, DST, 4, nat_lip, 0), 53 PEDIT_FIELDS(IP6_, SRC_31_0, 4, nat_fip, 0), 54 PEDIT_FIELDS(IP6_, SRC_63_32, 4, nat_fip, 4), 55 PEDIT_FIELDS(IP6_, SRC_95_64, 4, nat_fip, 8), 56 PEDIT_FIELDS(IP6_, SRC_127_96, 4, nat_fip, 12), 57 PEDIT_FIELDS(IP6_, DST_31_0, 4, nat_lip, 0), 58 PEDIT_FIELDS(IP6_, DST_63_32, 4, nat_lip, 4), 59 PEDIT_FIELDS(IP6_, DST_95_64, 4, nat_lip, 8), 60 PEDIT_FIELDS(IP6_, DST_127_96, 4, nat_lip, 12), 61 PEDIT_FIELDS(TCP_, SPORT, 2, nat_fport, 0), 62 PEDIT_FIELDS(TCP_, DPORT, 2, nat_lport, 0), 63 PEDIT_FIELDS(UDP_, SPORT, 2, nat_fport, 0), 64 PEDIT_FIELDS(UDP_, DPORT, 2, nat_lport, 0), 65 }; 66 67 static struct ch_tc_flower_entry *allocate_flower_entry(void) 68 { 69 struct ch_tc_flower_entry *new = kzalloc(sizeof(*new), GFP_KERNEL); 70 spin_lock_init(&new->lock); 71 return new; 72 } 73 74 /* Must be called with either RTNL or rcu_read_lock */ 75 static struct ch_tc_flower_entry *ch_flower_lookup(struct adapter *adap, 76 unsigned long flower_cookie) 77 { 78 return rhashtable_lookup_fast(&adap->flower_tbl, &flower_cookie, 79 adap->flower_ht_params); 80 } 81 82 static void cxgb4_process_flow_match(struct net_device *dev, 83 struct tc_cls_flower_offload *cls, 84 struct ch_filter_specification *fs) 85 { 86 u16 addr_type = 0; 87 88 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { 89 struct flow_dissector_key_control *key = 90 skb_flow_dissector_target(cls->dissector, 91 FLOW_DISSECTOR_KEY_CONTROL, 92 cls->key); 93 94 addr_type = key->addr_type; 95 } 96 97 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 98 struct flow_dissector_key_basic *key = 99 skb_flow_dissector_target(cls->dissector, 100 FLOW_DISSECTOR_KEY_BASIC, 101 cls->key); 102 struct flow_dissector_key_basic *mask = 103 skb_flow_dissector_target(cls->dissector, 104 FLOW_DISSECTOR_KEY_BASIC, 105 cls->mask); 106 u16 ethtype_key = ntohs(key->n_proto); 107 u16 ethtype_mask = ntohs(mask->n_proto); 108 109 if (ethtype_key == ETH_P_ALL) { 110 ethtype_key = 0; 111 ethtype_mask = 0; 112 } 113 114 fs->val.ethtype = ethtype_key; 115 fs->mask.ethtype = ethtype_mask; 116 fs->val.proto = key->ip_proto; 117 fs->mask.proto = mask->ip_proto; 118 } 119 120 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 121 struct flow_dissector_key_ipv4_addrs *key = 122 skb_flow_dissector_target(cls->dissector, 123 FLOW_DISSECTOR_KEY_IPV4_ADDRS, 124 cls->key); 125 struct flow_dissector_key_ipv4_addrs *mask = 126 skb_flow_dissector_target(cls->dissector, 127 FLOW_DISSECTOR_KEY_IPV4_ADDRS, 128 cls->mask); 129 fs->type = 0; 130 memcpy(&fs->val.lip[0], &key->dst, sizeof(key->dst)); 131 memcpy(&fs->val.fip[0], &key->src, sizeof(key->src)); 132 memcpy(&fs->mask.lip[0], &mask->dst, sizeof(mask->dst)); 133 memcpy(&fs->mask.fip[0], &mask->src, sizeof(mask->src)); 134 135 /* also initialize nat_lip/fip to same values */ 136 memcpy(&fs->nat_lip[0], &key->dst, sizeof(key->dst)); 137 memcpy(&fs->nat_fip[0], &key->src, sizeof(key->src)); 138 139 } 140 141 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 142 struct flow_dissector_key_ipv6_addrs *key = 143 skb_flow_dissector_target(cls->dissector, 144 FLOW_DISSECTOR_KEY_IPV6_ADDRS, 145 cls->key); 146 struct flow_dissector_key_ipv6_addrs *mask = 147 skb_flow_dissector_target(cls->dissector, 148 FLOW_DISSECTOR_KEY_IPV6_ADDRS, 149 cls->mask); 150 151 fs->type = 1; 152 memcpy(&fs->val.lip[0], key->dst.s6_addr, sizeof(key->dst)); 153 memcpy(&fs->val.fip[0], key->src.s6_addr, sizeof(key->src)); 154 memcpy(&fs->mask.lip[0], mask->dst.s6_addr, sizeof(mask->dst)); 155 memcpy(&fs->mask.fip[0], mask->src.s6_addr, sizeof(mask->src)); 156 157 /* also initialize nat_lip/fip to same values */ 158 memcpy(&fs->nat_lip[0], key->dst.s6_addr, sizeof(key->dst)); 159 memcpy(&fs->nat_fip[0], key->src.s6_addr, sizeof(key->src)); 160 } 161 162 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_PORTS)) { 163 struct flow_dissector_key_ports *key, *mask; 164 165 key = skb_flow_dissector_target(cls->dissector, 166 FLOW_DISSECTOR_KEY_PORTS, 167 cls->key); 168 mask = skb_flow_dissector_target(cls->dissector, 169 FLOW_DISSECTOR_KEY_PORTS, 170 cls->mask); 171 fs->val.lport = cpu_to_be16(key->dst); 172 fs->mask.lport = cpu_to_be16(mask->dst); 173 fs->val.fport = cpu_to_be16(key->src); 174 fs->mask.fport = cpu_to_be16(mask->src); 175 176 /* also initialize nat_lport/fport to same values */ 177 fs->nat_lport = cpu_to_be16(key->dst); 178 fs->nat_fport = cpu_to_be16(key->src); 179 } 180 181 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { 182 struct flow_dissector_key_ip *key, *mask; 183 184 key = skb_flow_dissector_target(cls->dissector, 185 FLOW_DISSECTOR_KEY_IP, 186 cls->key); 187 mask = skb_flow_dissector_target(cls->dissector, 188 FLOW_DISSECTOR_KEY_IP, 189 cls->mask); 190 fs->val.tos = key->tos; 191 fs->mask.tos = mask->tos; 192 } 193 194 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_VLAN)) { 195 struct flow_dissector_key_vlan *key, *mask; 196 u16 vlan_tci, vlan_tci_mask; 197 198 key = skb_flow_dissector_target(cls->dissector, 199 FLOW_DISSECTOR_KEY_VLAN, 200 cls->key); 201 mask = skb_flow_dissector_target(cls->dissector, 202 FLOW_DISSECTOR_KEY_VLAN, 203 cls->mask); 204 vlan_tci = key->vlan_id | (key->vlan_priority << 205 VLAN_PRIO_SHIFT); 206 vlan_tci_mask = mask->vlan_id | (mask->vlan_priority << 207 VLAN_PRIO_SHIFT); 208 fs->val.ivlan = cpu_to_be16(vlan_tci); 209 fs->mask.ivlan = cpu_to_be16(vlan_tci_mask); 210 211 /* Chelsio adapters use ivlan_vld bit to match vlan packets 212 * as 802.1Q. Also, when vlan tag is present in packets, 213 * ethtype match is used then to match on ethtype of inner 214 * header ie. the header following the vlan header. 215 * So, set the ivlan_vld based on ethtype info supplied by 216 * TC for vlan packets if its 802.1Q. And then reset the 217 * ethtype value else, hw will try to match the supplied 218 * ethtype value with ethtype of inner header. 219 */ 220 if (fs->val.ethtype == ETH_P_8021Q) { 221 fs->val.ivlan_vld = 1; 222 fs->mask.ivlan_vld = 1; 223 fs->val.ethtype = 0; 224 fs->mask.ethtype = 0; 225 } 226 } 227 228 /* Match only packets coming from the ingress port where this 229 * filter will be created. 230 */ 231 fs->val.iport = netdev2pinfo(dev)->port_id; 232 fs->mask.iport = ~0; 233 } 234 235 static int cxgb4_validate_flow_match(struct net_device *dev, 236 struct tc_cls_flower_offload *cls) 237 { 238 u16 ethtype_mask = 0; 239 u16 ethtype_key = 0; 240 241 if (cls->dissector->used_keys & 242 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | 243 BIT(FLOW_DISSECTOR_KEY_BASIC) | 244 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | 245 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | 246 BIT(FLOW_DISSECTOR_KEY_PORTS) | 247 BIT(FLOW_DISSECTOR_KEY_VLAN) | 248 BIT(FLOW_DISSECTOR_KEY_IP))) { 249 netdev_warn(dev, "Unsupported key used: 0x%x\n", 250 cls->dissector->used_keys); 251 return -EOPNOTSUPP; 252 } 253 254 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 255 struct flow_dissector_key_basic *key = 256 skb_flow_dissector_target(cls->dissector, 257 FLOW_DISSECTOR_KEY_BASIC, 258 cls->key); 259 struct flow_dissector_key_basic *mask = 260 skb_flow_dissector_target(cls->dissector, 261 FLOW_DISSECTOR_KEY_BASIC, 262 cls->mask); 263 ethtype_key = ntohs(key->n_proto); 264 ethtype_mask = ntohs(mask->n_proto); 265 } 266 267 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { 268 u16 eth_ip_type = ethtype_key & ethtype_mask; 269 struct flow_dissector_key_ip *mask; 270 271 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) { 272 netdev_err(dev, "IP Key supported only with IPv4/v6"); 273 return -EINVAL; 274 } 275 276 mask = skb_flow_dissector_target(cls->dissector, 277 FLOW_DISSECTOR_KEY_IP, 278 cls->mask); 279 if (mask->ttl) { 280 netdev_warn(dev, "ttl match unsupported for offload"); 281 return -EOPNOTSUPP; 282 } 283 } 284 285 return 0; 286 } 287 288 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask, 289 u8 field) 290 { 291 u32 set_val = val & ~mask; 292 u32 offset = 0; 293 u8 size = 1; 294 int i; 295 296 for (i = 0; i < ARRAY_SIZE(pedits); i++) { 297 if (pedits[i].field == field) { 298 offset = pedits[i].offset; 299 size = pedits[i].size; 300 break; 301 } 302 } 303 memcpy((u8 *)fs + offset, &set_val, size); 304 } 305 306 static void process_pedit_field(struct ch_filter_specification *fs, u32 val, 307 u32 mask, u32 offset, u8 htype) 308 { 309 switch (htype) { 310 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 311 switch (offset) { 312 case PEDIT_ETH_DMAC_31_0: 313 fs->newdmac = 1; 314 offload_pedit(fs, val, mask, ETH_DMAC_31_0); 315 break; 316 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 317 if (~mask & PEDIT_ETH_DMAC_MASK) 318 offload_pedit(fs, val, mask, ETH_DMAC_47_32); 319 else 320 offload_pedit(fs, val >> 16, mask >> 16, 321 ETH_SMAC_15_0); 322 break; 323 case PEDIT_ETH_SMAC_47_16: 324 fs->newsmac = 1; 325 offload_pedit(fs, val, mask, ETH_SMAC_47_16); 326 } 327 break; 328 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 329 switch (offset) { 330 case PEDIT_IP4_SRC: 331 offload_pedit(fs, val, mask, IP4_SRC); 332 break; 333 case PEDIT_IP4_DST: 334 offload_pedit(fs, val, mask, IP4_DST); 335 } 336 fs->nat_mode = NAT_MODE_ALL; 337 break; 338 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 339 switch (offset) { 340 case PEDIT_IP6_SRC_31_0: 341 offload_pedit(fs, val, mask, IP6_SRC_31_0); 342 break; 343 case PEDIT_IP6_SRC_63_32: 344 offload_pedit(fs, val, mask, IP6_SRC_63_32); 345 break; 346 case PEDIT_IP6_SRC_95_64: 347 offload_pedit(fs, val, mask, IP6_SRC_95_64); 348 break; 349 case PEDIT_IP6_SRC_127_96: 350 offload_pedit(fs, val, mask, IP6_SRC_127_96); 351 break; 352 case PEDIT_IP6_DST_31_0: 353 offload_pedit(fs, val, mask, IP6_DST_31_0); 354 break; 355 case PEDIT_IP6_DST_63_32: 356 offload_pedit(fs, val, mask, IP6_DST_63_32); 357 break; 358 case PEDIT_IP6_DST_95_64: 359 offload_pedit(fs, val, mask, IP6_DST_95_64); 360 break; 361 case PEDIT_IP6_DST_127_96: 362 offload_pedit(fs, val, mask, IP6_DST_127_96); 363 } 364 fs->nat_mode = NAT_MODE_ALL; 365 break; 366 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 367 switch (offset) { 368 case PEDIT_TCP_SPORT_DPORT: 369 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 370 offload_pedit(fs, cpu_to_be32(val) >> 16, 371 cpu_to_be32(mask) >> 16, 372 TCP_SPORT); 373 else 374 offload_pedit(fs, cpu_to_be32(val), 375 cpu_to_be32(mask), TCP_DPORT); 376 } 377 fs->nat_mode = NAT_MODE_ALL; 378 break; 379 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 380 switch (offset) { 381 case PEDIT_UDP_SPORT_DPORT: 382 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 383 offload_pedit(fs, cpu_to_be32(val) >> 16, 384 cpu_to_be32(mask) >> 16, 385 UDP_SPORT); 386 else 387 offload_pedit(fs, cpu_to_be32(val), 388 cpu_to_be32(mask), UDP_DPORT); 389 } 390 fs->nat_mode = NAT_MODE_ALL; 391 } 392 } 393 394 static void cxgb4_process_flow_actions(struct net_device *in, 395 struct tc_cls_flower_offload *cls, 396 struct ch_filter_specification *fs) 397 { 398 const struct tc_action *a; 399 LIST_HEAD(actions); 400 401 tcf_exts_to_list(cls->exts, &actions); 402 list_for_each_entry(a, &actions, list) { 403 if (is_tcf_gact_ok(a)) { 404 fs->action = FILTER_PASS; 405 } else if (is_tcf_gact_shot(a)) { 406 fs->action = FILTER_DROP; 407 } else if (is_tcf_mirred_egress_redirect(a)) { 408 int ifindex = tcf_mirred_ifindex(a); 409 struct net_device *out = __dev_get_by_index(dev_net(in), 410 ifindex); 411 struct port_info *pi = netdev_priv(out); 412 413 fs->action = FILTER_SWITCH; 414 fs->eport = pi->port_id; 415 } else if (is_tcf_vlan(a)) { 416 u32 vlan_action = tcf_vlan_action(a); 417 u8 prio = tcf_vlan_push_prio(a); 418 u16 vid = tcf_vlan_push_vid(a); 419 u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid; 420 421 switch (vlan_action) { 422 case TCA_VLAN_ACT_POP: 423 fs->newvlan |= VLAN_REMOVE; 424 break; 425 case TCA_VLAN_ACT_PUSH: 426 fs->newvlan |= VLAN_INSERT; 427 fs->vlan = vlan_tci; 428 break; 429 case TCA_VLAN_ACT_MODIFY: 430 fs->newvlan |= VLAN_REWRITE; 431 fs->vlan = vlan_tci; 432 break; 433 default: 434 break; 435 } 436 } else if (is_tcf_pedit(a)) { 437 u32 mask, val, offset; 438 int nkeys, i; 439 u8 htype; 440 441 nkeys = tcf_pedit_nkeys(a); 442 for (i = 0; i < nkeys; i++) { 443 htype = tcf_pedit_htype(a, i); 444 mask = tcf_pedit_mask(a, i); 445 val = tcf_pedit_val(a, i); 446 offset = tcf_pedit_offset(a, i); 447 448 process_pedit_field(fs, val, mask, offset, 449 htype); 450 } 451 } 452 } 453 } 454 455 static bool valid_l4_mask(u32 mask) 456 { 457 u16 hi, lo; 458 459 /* Either the upper 16-bits (SPORT) OR the lower 460 * 16-bits (DPORT) can be set, but NOT BOTH. 461 */ 462 hi = (mask >> 16) & 0xFFFF; 463 lo = mask & 0xFFFF; 464 465 return hi && lo ? false : true; 466 } 467 468 static bool valid_pedit_action(struct net_device *dev, 469 const struct tc_action *a) 470 { 471 u32 mask, offset; 472 u8 cmd, htype; 473 int nkeys, i; 474 475 nkeys = tcf_pedit_nkeys(a); 476 for (i = 0; i < nkeys; i++) { 477 htype = tcf_pedit_htype(a, i); 478 cmd = tcf_pedit_cmd(a, i); 479 mask = tcf_pedit_mask(a, i); 480 offset = tcf_pedit_offset(a, i); 481 482 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET) { 483 netdev_err(dev, "%s: Unsupported pedit cmd\n", 484 __func__); 485 return false; 486 } 487 488 switch (htype) { 489 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 490 switch (offset) { 491 case PEDIT_ETH_DMAC_31_0: 492 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 493 case PEDIT_ETH_SMAC_47_16: 494 break; 495 default: 496 netdev_err(dev, "%s: Unsupported pedit field\n", 497 __func__); 498 return false; 499 } 500 break; 501 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 502 switch (offset) { 503 case PEDIT_IP4_SRC: 504 case PEDIT_IP4_DST: 505 break; 506 default: 507 netdev_err(dev, "%s: Unsupported pedit field\n", 508 __func__); 509 return false; 510 } 511 break; 512 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 513 switch (offset) { 514 case PEDIT_IP6_SRC_31_0: 515 case PEDIT_IP6_SRC_63_32: 516 case PEDIT_IP6_SRC_95_64: 517 case PEDIT_IP6_SRC_127_96: 518 case PEDIT_IP6_DST_31_0: 519 case PEDIT_IP6_DST_63_32: 520 case PEDIT_IP6_DST_95_64: 521 case PEDIT_IP6_DST_127_96: 522 break; 523 default: 524 netdev_err(dev, "%s: Unsupported pedit field\n", 525 __func__); 526 return false; 527 } 528 break; 529 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 530 switch (offset) { 531 case PEDIT_TCP_SPORT_DPORT: 532 if (!valid_l4_mask(~mask)) { 533 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n", 534 __func__); 535 return false; 536 } 537 break; 538 default: 539 netdev_err(dev, "%s: Unsupported pedit field\n", 540 __func__); 541 return false; 542 } 543 break; 544 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 545 switch (offset) { 546 case PEDIT_UDP_SPORT_DPORT: 547 if (!valid_l4_mask(~mask)) { 548 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n", 549 __func__); 550 return false; 551 } 552 break; 553 default: 554 netdev_err(dev, "%s: Unsupported pedit field\n", 555 __func__); 556 return false; 557 } 558 break; 559 default: 560 netdev_err(dev, "%s: Unsupported pedit type\n", 561 __func__); 562 return false; 563 } 564 } 565 return true; 566 } 567 568 static int cxgb4_validate_flow_actions(struct net_device *dev, 569 struct tc_cls_flower_offload *cls) 570 { 571 const struct tc_action *a; 572 bool act_redir = false; 573 bool act_pedit = false; 574 bool act_vlan = false; 575 LIST_HEAD(actions); 576 577 tcf_exts_to_list(cls->exts, &actions); 578 list_for_each_entry(a, &actions, list) { 579 if (is_tcf_gact_ok(a)) { 580 /* Do nothing */ 581 } else if (is_tcf_gact_shot(a)) { 582 /* Do nothing */ 583 } else if (is_tcf_mirred_egress_redirect(a)) { 584 struct adapter *adap = netdev2adap(dev); 585 struct net_device *n_dev; 586 unsigned int i, ifindex; 587 bool found = false; 588 589 ifindex = tcf_mirred_ifindex(a); 590 for_each_port(adap, i) { 591 n_dev = adap->port[i]; 592 if (ifindex == n_dev->ifindex) { 593 found = true; 594 break; 595 } 596 } 597 598 /* If interface doesn't belong to our hw, then 599 * the provided output port is not valid 600 */ 601 if (!found) { 602 netdev_err(dev, "%s: Out port invalid\n", 603 __func__); 604 return -EINVAL; 605 } 606 act_redir = true; 607 } else if (is_tcf_vlan(a)) { 608 u16 proto = be16_to_cpu(tcf_vlan_push_proto(a)); 609 u32 vlan_action = tcf_vlan_action(a); 610 611 switch (vlan_action) { 612 case TCA_VLAN_ACT_POP: 613 break; 614 case TCA_VLAN_ACT_PUSH: 615 case TCA_VLAN_ACT_MODIFY: 616 if (proto != ETH_P_8021Q) { 617 netdev_err(dev, "%s: Unsupported vlan proto\n", 618 __func__); 619 return -EOPNOTSUPP; 620 } 621 break; 622 default: 623 netdev_err(dev, "%s: Unsupported vlan action\n", 624 __func__); 625 return -EOPNOTSUPP; 626 } 627 act_vlan = true; 628 } else if (is_tcf_pedit(a)) { 629 bool pedit_valid = valid_pedit_action(dev, a); 630 631 if (!pedit_valid) 632 return -EOPNOTSUPP; 633 act_pedit = true; 634 } else { 635 netdev_err(dev, "%s: Unsupported action\n", __func__); 636 return -EOPNOTSUPP; 637 } 638 } 639 640 if ((act_pedit || act_vlan) && !act_redir) { 641 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n", 642 __func__); 643 return -EINVAL; 644 } 645 646 return 0; 647 } 648 649 int cxgb4_tc_flower_replace(struct net_device *dev, 650 struct tc_cls_flower_offload *cls) 651 { 652 struct adapter *adap = netdev2adap(dev); 653 struct ch_tc_flower_entry *ch_flower; 654 struct ch_filter_specification *fs; 655 struct filter_ctx ctx; 656 int fidx; 657 int ret; 658 659 if (cxgb4_validate_flow_actions(dev, cls)) 660 return -EOPNOTSUPP; 661 662 if (cxgb4_validate_flow_match(dev, cls)) 663 return -EOPNOTSUPP; 664 665 ch_flower = allocate_flower_entry(); 666 if (!ch_flower) { 667 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__); 668 return -ENOMEM; 669 } 670 671 fs = &ch_flower->fs; 672 fs->hitcnts = 1; 673 cxgb4_process_flow_match(dev, cls, fs); 674 cxgb4_process_flow_actions(dev, cls, fs); 675 676 fs->hash = is_filter_exact_match(adap, fs); 677 if (fs->hash) { 678 fidx = 0; 679 } else { 680 fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET); 681 if (fidx < 0) { 682 netdev_err(dev, "%s: No fidx for offload.\n", __func__); 683 ret = -ENOMEM; 684 goto free_entry; 685 } 686 } 687 688 init_completion(&ctx.completion); 689 ret = __cxgb4_set_filter(dev, fidx, fs, &ctx); 690 if (ret) { 691 netdev_err(dev, "%s: filter creation err %d\n", 692 __func__, ret); 693 goto free_entry; 694 } 695 696 /* Wait for reply */ 697 ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); 698 if (!ret) { 699 ret = -ETIMEDOUT; 700 goto free_entry; 701 } 702 703 ret = ctx.result; 704 /* Check if hw returned error for filter creation */ 705 if (ret) { 706 netdev_err(dev, "%s: filter creation err %d\n", 707 __func__, ret); 708 goto free_entry; 709 } 710 711 ch_flower->tc_flower_cookie = cls->cookie; 712 ch_flower->filter_id = ctx.tid; 713 ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node, 714 adap->flower_ht_params); 715 if (ret) 716 goto del_filter; 717 718 return 0; 719 720 del_filter: 721 cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 722 723 free_entry: 724 kfree(ch_flower); 725 return ret; 726 } 727 728 int cxgb4_tc_flower_destroy(struct net_device *dev, 729 struct tc_cls_flower_offload *cls) 730 { 731 struct adapter *adap = netdev2adap(dev); 732 struct ch_tc_flower_entry *ch_flower; 733 int ret; 734 735 ch_flower = ch_flower_lookup(adap, cls->cookie); 736 if (!ch_flower) 737 return -ENOENT; 738 739 ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 740 if (ret) 741 goto err; 742 743 ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node, 744 adap->flower_ht_params); 745 if (ret) { 746 netdev_err(dev, "Flow remove from rhashtable failed"); 747 goto err; 748 } 749 kfree_rcu(ch_flower, rcu); 750 751 err: 752 return ret; 753 } 754 755 static void ch_flower_stats_handler(struct work_struct *work) 756 { 757 struct adapter *adap = container_of(work, struct adapter, 758 flower_stats_work); 759 struct ch_tc_flower_entry *flower_entry; 760 struct ch_tc_flower_stats *ofld_stats; 761 struct rhashtable_iter iter; 762 u64 packets; 763 u64 bytes; 764 int ret; 765 766 rhashtable_walk_enter(&adap->flower_tbl, &iter); 767 do { 768 flower_entry = ERR_PTR(rhashtable_walk_start(&iter)); 769 if (IS_ERR(flower_entry)) 770 goto walk_stop; 771 772 while ((flower_entry = rhashtable_walk_next(&iter)) && 773 !IS_ERR(flower_entry)) { 774 ret = cxgb4_get_filter_counters(adap->port[0], 775 flower_entry->filter_id, 776 &packets, &bytes, 777 flower_entry->fs.hash); 778 if (!ret) { 779 spin_lock(&flower_entry->lock); 780 ofld_stats = &flower_entry->stats; 781 782 if (ofld_stats->prev_packet_count != packets) { 783 ofld_stats->prev_packet_count = packets; 784 ofld_stats->last_used = jiffies; 785 } 786 spin_unlock(&flower_entry->lock); 787 } 788 } 789 walk_stop: 790 rhashtable_walk_stop(&iter); 791 } while (flower_entry == ERR_PTR(-EAGAIN)); 792 rhashtable_walk_exit(&iter); 793 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 794 } 795 796 static void ch_flower_stats_cb(struct timer_list *t) 797 { 798 struct adapter *adap = from_timer(adap, t, flower_stats_timer); 799 800 schedule_work(&adap->flower_stats_work); 801 } 802 803 int cxgb4_tc_flower_stats(struct net_device *dev, 804 struct tc_cls_flower_offload *cls) 805 { 806 struct adapter *adap = netdev2adap(dev); 807 struct ch_tc_flower_stats *ofld_stats; 808 struct ch_tc_flower_entry *ch_flower; 809 u64 packets; 810 u64 bytes; 811 int ret; 812 813 ch_flower = ch_flower_lookup(adap, cls->cookie); 814 if (!ch_flower) { 815 ret = -ENOENT; 816 goto err; 817 } 818 819 ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id, 820 &packets, &bytes, 821 ch_flower->fs.hash); 822 if (ret < 0) 823 goto err; 824 825 spin_lock_bh(&ch_flower->lock); 826 ofld_stats = &ch_flower->stats; 827 if (ofld_stats->packet_count != packets) { 828 if (ofld_stats->prev_packet_count != packets) 829 ofld_stats->last_used = jiffies; 830 tcf_exts_stats_update(cls->exts, bytes - ofld_stats->byte_count, 831 packets - ofld_stats->packet_count, 832 ofld_stats->last_used); 833 834 ofld_stats->packet_count = packets; 835 ofld_stats->byte_count = bytes; 836 ofld_stats->prev_packet_count = packets; 837 } 838 spin_unlock_bh(&ch_flower->lock); 839 return 0; 840 841 err: 842 return ret; 843 } 844 845 static const struct rhashtable_params cxgb4_tc_flower_ht_params = { 846 .nelem_hint = 384, 847 .head_offset = offsetof(struct ch_tc_flower_entry, node), 848 .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie), 849 .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie), 850 .max_size = 524288, 851 .min_size = 512, 852 .automatic_shrinking = true 853 }; 854 855 int cxgb4_init_tc_flower(struct adapter *adap) 856 { 857 int ret; 858 859 adap->flower_ht_params = cxgb4_tc_flower_ht_params; 860 ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params); 861 if (ret) 862 return ret; 863 864 INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler); 865 timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0); 866 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 867 return 0; 868 } 869 870 void cxgb4_cleanup_tc_flower(struct adapter *adap) 871 { 872 if (adap->flower_stats_timer.function) 873 del_timer_sync(&adap->flower_stats_timer); 874 cancel_work_sync(&adap->flower_stats_work); 875 rhashtable_destroy(&adap->flower_tbl); 876 } 877