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 static 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 if (ethtype_key == ETH_P_IPV6) 115 fs->type = 1; 116 117 fs->val.ethtype = ethtype_key; 118 fs->mask.ethtype = ethtype_mask; 119 fs->val.proto = key->ip_proto; 120 fs->mask.proto = mask->ip_proto; 121 } 122 123 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 124 struct flow_dissector_key_ipv4_addrs *key = 125 skb_flow_dissector_target(cls->dissector, 126 FLOW_DISSECTOR_KEY_IPV4_ADDRS, 127 cls->key); 128 struct flow_dissector_key_ipv4_addrs *mask = 129 skb_flow_dissector_target(cls->dissector, 130 FLOW_DISSECTOR_KEY_IPV4_ADDRS, 131 cls->mask); 132 fs->type = 0; 133 memcpy(&fs->val.lip[0], &key->dst, sizeof(key->dst)); 134 memcpy(&fs->val.fip[0], &key->src, sizeof(key->src)); 135 memcpy(&fs->mask.lip[0], &mask->dst, sizeof(mask->dst)); 136 memcpy(&fs->mask.fip[0], &mask->src, sizeof(mask->src)); 137 138 /* also initialize nat_lip/fip to same values */ 139 memcpy(&fs->nat_lip[0], &key->dst, sizeof(key->dst)); 140 memcpy(&fs->nat_fip[0], &key->src, sizeof(key->src)); 141 142 } 143 144 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 145 struct flow_dissector_key_ipv6_addrs *key = 146 skb_flow_dissector_target(cls->dissector, 147 FLOW_DISSECTOR_KEY_IPV6_ADDRS, 148 cls->key); 149 struct flow_dissector_key_ipv6_addrs *mask = 150 skb_flow_dissector_target(cls->dissector, 151 FLOW_DISSECTOR_KEY_IPV6_ADDRS, 152 cls->mask); 153 154 fs->type = 1; 155 memcpy(&fs->val.lip[0], key->dst.s6_addr, sizeof(key->dst)); 156 memcpy(&fs->val.fip[0], key->src.s6_addr, sizeof(key->src)); 157 memcpy(&fs->mask.lip[0], mask->dst.s6_addr, sizeof(mask->dst)); 158 memcpy(&fs->mask.fip[0], mask->src.s6_addr, sizeof(mask->src)); 159 160 /* also initialize nat_lip/fip to same values */ 161 memcpy(&fs->nat_lip[0], key->dst.s6_addr, sizeof(key->dst)); 162 memcpy(&fs->nat_fip[0], key->src.s6_addr, sizeof(key->src)); 163 } 164 165 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_PORTS)) { 166 struct flow_dissector_key_ports *key, *mask; 167 168 key = skb_flow_dissector_target(cls->dissector, 169 FLOW_DISSECTOR_KEY_PORTS, 170 cls->key); 171 mask = skb_flow_dissector_target(cls->dissector, 172 FLOW_DISSECTOR_KEY_PORTS, 173 cls->mask); 174 fs->val.lport = cpu_to_be16(key->dst); 175 fs->mask.lport = cpu_to_be16(mask->dst); 176 fs->val.fport = cpu_to_be16(key->src); 177 fs->mask.fport = cpu_to_be16(mask->src); 178 179 /* also initialize nat_lport/fport to same values */ 180 fs->nat_lport = cpu_to_be16(key->dst); 181 fs->nat_fport = cpu_to_be16(key->src); 182 } 183 184 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { 185 struct flow_dissector_key_ip *key, *mask; 186 187 key = skb_flow_dissector_target(cls->dissector, 188 FLOW_DISSECTOR_KEY_IP, 189 cls->key); 190 mask = skb_flow_dissector_target(cls->dissector, 191 FLOW_DISSECTOR_KEY_IP, 192 cls->mask); 193 fs->val.tos = key->tos; 194 fs->mask.tos = mask->tos; 195 } 196 197 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) { 198 struct flow_dissector_key_keyid *key, *mask; 199 200 key = skb_flow_dissector_target(cls->dissector, 201 FLOW_DISSECTOR_KEY_ENC_KEYID, 202 cls->key); 203 mask = skb_flow_dissector_target(cls->dissector, 204 FLOW_DISSECTOR_KEY_ENC_KEYID, 205 cls->mask); 206 fs->val.vni = be32_to_cpu(key->keyid); 207 fs->mask.vni = be32_to_cpu(mask->keyid); 208 if (fs->mask.vni) { 209 fs->val.encap_vld = 1; 210 fs->mask.encap_vld = 1; 211 } 212 } 213 214 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_VLAN)) { 215 struct flow_dissector_key_vlan *key, *mask; 216 u16 vlan_tci, vlan_tci_mask; 217 218 key = skb_flow_dissector_target(cls->dissector, 219 FLOW_DISSECTOR_KEY_VLAN, 220 cls->key); 221 mask = skb_flow_dissector_target(cls->dissector, 222 FLOW_DISSECTOR_KEY_VLAN, 223 cls->mask); 224 vlan_tci = key->vlan_id | (key->vlan_priority << 225 VLAN_PRIO_SHIFT); 226 vlan_tci_mask = mask->vlan_id | (mask->vlan_priority << 227 VLAN_PRIO_SHIFT); 228 fs->val.ivlan = vlan_tci; 229 fs->mask.ivlan = vlan_tci_mask; 230 231 /* Chelsio adapters use ivlan_vld bit to match vlan packets 232 * as 802.1Q. Also, when vlan tag is present in packets, 233 * ethtype match is used then to match on ethtype of inner 234 * header ie. the header following the vlan header. 235 * So, set the ivlan_vld based on ethtype info supplied by 236 * TC for vlan packets if its 802.1Q. And then reset the 237 * ethtype value else, hw will try to match the supplied 238 * ethtype value with ethtype of inner header. 239 */ 240 if (fs->val.ethtype == ETH_P_8021Q) { 241 fs->val.ivlan_vld = 1; 242 fs->mask.ivlan_vld = 1; 243 fs->val.ethtype = 0; 244 fs->mask.ethtype = 0; 245 } 246 } 247 248 /* Match only packets coming from the ingress port where this 249 * filter will be created. 250 */ 251 fs->val.iport = netdev2pinfo(dev)->port_id; 252 fs->mask.iport = ~0; 253 } 254 255 static int cxgb4_validate_flow_match(struct net_device *dev, 256 struct tc_cls_flower_offload *cls) 257 { 258 u16 ethtype_mask = 0; 259 u16 ethtype_key = 0; 260 261 if (cls->dissector->used_keys & 262 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | 263 BIT(FLOW_DISSECTOR_KEY_BASIC) | 264 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | 265 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | 266 BIT(FLOW_DISSECTOR_KEY_PORTS) | 267 BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | 268 BIT(FLOW_DISSECTOR_KEY_VLAN) | 269 BIT(FLOW_DISSECTOR_KEY_IP))) { 270 netdev_warn(dev, "Unsupported key used: 0x%x\n", 271 cls->dissector->used_keys); 272 return -EOPNOTSUPP; 273 } 274 275 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 276 struct flow_dissector_key_basic *key = 277 skb_flow_dissector_target(cls->dissector, 278 FLOW_DISSECTOR_KEY_BASIC, 279 cls->key); 280 struct flow_dissector_key_basic *mask = 281 skb_flow_dissector_target(cls->dissector, 282 FLOW_DISSECTOR_KEY_BASIC, 283 cls->mask); 284 ethtype_key = ntohs(key->n_proto); 285 ethtype_mask = ntohs(mask->n_proto); 286 } 287 288 if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { 289 u16 eth_ip_type = ethtype_key & ethtype_mask; 290 struct flow_dissector_key_ip *mask; 291 292 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) { 293 netdev_err(dev, "IP Key supported only with IPv4/v6"); 294 return -EINVAL; 295 } 296 297 mask = skb_flow_dissector_target(cls->dissector, 298 FLOW_DISSECTOR_KEY_IP, 299 cls->mask); 300 if (mask->ttl) { 301 netdev_warn(dev, "ttl match unsupported for offload"); 302 return -EOPNOTSUPP; 303 } 304 } 305 306 return 0; 307 } 308 309 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask, 310 u8 field) 311 { 312 u32 set_val = val & ~mask; 313 u32 offset = 0; 314 u8 size = 1; 315 int i; 316 317 for (i = 0; i < ARRAY_SIZE(pedits); i++) { 318 if (pedits[i].field == field) { 319 offset = pedits[i].offset; 320 size = pedits[i].size; 321 break; 322 } 323 } 324 memcpy((u8 *)fs + offset, &set_val, size); 325 } 326 327 static void process_pedit_field(struct ch_filter_specification *fs, u32 val, 328 u32 mask, u32 offset, u8 htype) 329 { 330 switch (htype) { 331 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 332 switch (offset) { 333 case PEDIT_ETH_DMAC_31_0: 334 fs->newdmac = 1; 335 offload_pedit(fs, val, mask, ETH_DMAC_31_0); 336 break; 337 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 338 if (~mask & PEDIT_ETH_DMAC_MASK) 339 offload_pedit(fs, val, mask, ETH_DMAC_47_32); 340 else 341 offload_pedit(fs, val >> 16, mask >> 16, 342 ETH_SMAC_15_0); 343 break; 344 case PEDIT_ETH_SMAC_47_16: 345 fs->newsmac = 1; 346 offload_pedit(fs, val, mask, ETH_SMAC_47_16); 347 } 348 break; 349 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 350 switch (offset) { 351 case PEDIT_IP4_SRC: 352 offload_pedit(fs, val, mask, IP4_SRC); 353 break; 354 case PEDIT_IP4_DST: 355 offload_pedit(fs, val, mask, IP4_DST); 356 } 357 fs->nat_mode = NAT_MODE_ALL; 358 break; 359 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 360 switch (offset) { 361 case PEDIT_IP6_SRC_31_0: 362 offload_pedit(fs, val, mask, IP6_SRC_31_0); 363 break; 364 case PEDIT_IP6_SRC_63_32: 365 offload_pedit(fs, val, mask, IP6_SRC_63_32); 366 break; 367 case PEDIT_IP6_SRC_95_64: 368 offload_pedit(fs, val, mask, IP6_SRC_95_64); 369 break; 370 case PEDIT_IP6_SRC_127_96: 371 offload_pedit(fs, val, mask, IP6_SRC_127_96); 372 break; 373 case PEDIT_IP6_DST_31_0: 374 offload_pedit(fs, val, mask, IP6_DST_31_0); 375 break; 376 case PEDIT_IP6_DST_63_32: 377 offload_pedit(fs, val, mask, IP6_DST_63_32); 378 break; 379 case PEDIT_IP6_DST_95_64: 380 offload_pedit(fs, val, mask, IP6_DST_95_64); 381 break; 382 case PEDIT_IP6_DST_127_96: 383 offload_pedit(fs, val, mask, IP6_DST_127_96); 384 } 385 fs->nat_mode = NAT_MODE_ALL; 386 break; 387 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 388 switch (offset) { 389 case PEDIT_TCP_SPORT_DPORT: 390 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 391 offload_pedit(fs, cpu_to_be32(val) >> 16, 392 cpu_to_be32(mask) >> 16, 393 TCP_SPORT); 394 else 395 offload_pedit(fs, cpu_to_be32(val), 396 cpu_to_be32(mask), TCP_DPORT); 397 } 398 fs->nat_mode = NAT_MODE_ALL; 399 break; 400 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 401 switch (offset) { 402 case PEDIT_UDP_SPORT_DPORT: 403 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 404 offload_pedit(fs, cpu_to_be32(val) >> 16, 405 cpu_to_be32(mask) >> 16, 406 UDP_SPORT); 407 else 408 offload_pedit(fs, cpu_to_be32(val), 409 cpu_to_be32(mask), UDP_DPORT); 410 } 411 fs->nat_mode = NAT_MODE_ALL; 412 } 413 } 414 415 static void cxgb4_process_flow_actions(struct net_device *in, 416 struct tc_cls_flower_offload *cls, 417 struct ch_filter_specification *fs) 418 { 419 const struct tc_action *a; 420 int i; 421 422 tcf_exts_for_each_action(i, a, cls->exts) { 423 if (is_tcf_gact_ok(a)) { 424 fs->action = FILTER_PASS; 425 } else if (is_tcf_gact_shot(a)) { 426 fs->action = FILTER_DROP; 427 } else if (is_tcf_mirred_egress_redirect(a)) { 428 struct net_device *out = tcf_mirred_dev(a); 429 struct port_info *pi = netdev_priv(out); 430 431 fs->action = FILTER_SWITCH; 432 fs->eport = pi->port_id; 433 } else if (is_tcf_vlan(a)) { 434 u32 vlan_action = tcf_vlan_action(a); 435 u8 prio = tcf_vlan_push_prio(a); 436 u16 vid = tcf_vlan_push_vid(a); 437 u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid; 438 439 switch (vlan_action) { 440 case TCA_VLAN_ACT_POP: 441 fs->newvlan |= VLAN_REMOVE; 442 break; 443 case TCA_VLAN_ACT_PUSH: 444 fs->newvlan |= VLAN_INSERT; 445 fs->vlan = vlan_tci; 446 break; 447 case TCA_VLAN_ACT_MODIFY: 448 fs->newvlan |= VLAN_REWRITE; 449 fs->vlan = vlan_tci; 450 break; 451 default: 452 break; 453 } 454 } else if (is_tcf_pedit(a)) { 455 u32 mask, val, offset; 456 int nkeys, i; 457 u8 htype; 458 459 nkeys = tcf_pedit_nkeys(a); 460 for (i = 0; i < nkeys; i++) { 461 htype = tcf_pedit_htype(a, i); 462 mask = tcf_pedit_mask(a, i); 463 val = tcf_pedit_val(a, i); 464 offset = tcf_pedit_offset(a, i); 465 466 process_pedit_field(fs, val, mask, offset, 467 htype); 468 } 469 } 470 } 471 } 472 473 static bool valid_l4_mask(u32 mask) 474 { 475 u16 hi, lo; 476 477 /* Either the upper 16-bits (SPORT) OR the lower 478 * 16-bits (DPORT) can be set, but NOT BOTH. 479 */ 480 hi = (mask >> 16) & 0xFFFF; 481 lo = mask & 0xFFFF; 482 483 return hi && lo ? false : true; 484 } 485 486 static bool valid_pedit_action(struct net_device *dev, 487 const struct tc_action *a) 488 { 489 u32 mask, offset; 490 u8 cmd, htype; 491 int nkeys, i; 492 493 nkeys = tcf_pedit_nkeys(a); 494 for (i = 0; i < nkeys; i++) { 495 htype = tcf_pedit_htype(a, i); 496 cmd = tcf_pedit_cmd(a, i); 497 mask = tcf_pedit_mask(a, i); 498 offset = tcf_pedit_offset(a, i); 499 500 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET) { 501 netdev_err(dev, "%s: Unsupported pedit cmd\n", 502 __func__); 503 return false; 504 } 505 506 switch (htype) { 507 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 508 switch (offset) { 509 case PEDIT_ETH_DMAC_31_0: 510 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 511 case PEDIT_ETH_SMAC_47_16: 512 break; 513 default: 514 netdev_err(dev, "%s: Unsupported pedit field\n", 515 __func__); 516 return false; 517 } 518 break; 519 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 520 switch (offset) { 521 case PEDIT_IP4_SRC: 522 case PEDIT_IP4_DST: 523 break; 524 default: 525 netdev_err(dev, "%s: Unsupported pedit field\n", 526 __func__); 527 return false; 528 } 529 break; 530 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 531 switch (offset) { 532 case PEDIT_IP6_SRC_31_0: 533 case PEDIT_IP6_SRC_63_32: 534 case PEDIT_IP6_SRC_95_64: 535 case PEDIT_IP6_SRC_127_96: 536 case PEDIT_IP6_DST_31_0: 537 case PEDIT_IP6_DST_63_32: 538 case PEDIT_IP6_DST_95_64: 539 case PEDIT_IP6_DST_127_96: 540 break; 541 default: 542 netdev_err(dev, "%s: Unsupported pedit field\n", 543 __func__); 544 return false; 545 } 546 break; 547 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 548 switch (offset) { 549 case PEDIT_TCP_SPORT_DPORT: 550 if (!valid_l4_mask(~mask)) { 551 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n", 552 __func__); 553 return false; 554 } 555 break; 556 default: 557 netdev_err(dev, "%s: Unsupported pedit field\n", 558 __func__); 559 return false; 560 } 561 break; 562 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 563 switch (offset) { 564 case PEDIT_UDP_SPORT_DPORT: 565 if (!valid_l4_mask(~mask)) { 566 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n", 567 __func__); 568 return false; 569 } 570 break; 571 default: 572 netdev_err(dev, "%s: Unsupported pedit field\n", 573 __func__); 574 return false; 575 } 576 break; 577 default: 578 netdev_err(dev, "%s: Unsupported pedit type\n", 579 __func__); 580 return false; 581 } 582 } 583 return true; 584 } 585 586 static int cxgb4_validate_flow_actions(struct net_device *dev, 587 struct tc_cls_flower_offload *cls) 588 { 589 const struct tc_action *a; 590 bool act_redir = false; 591 bool act_pedit = false; 592 bool act_vlan = false; 593 int i; 594 595 tcf_exts_for_each_action(i, a, cls->exts) { 596 if (is_tcf_gact_ok(a)) { 597 /* Do nothing */ 598 } else if (is_tcf_gact_shot(a)) { 599 /* Do nothing */ 600 } else if (is_tcf_mirred_egress_redirect(a)) { 601 struct adapter *adap = netdev2adap(dev); 602 struct net_device *n_dev, *target_dev; 603 unsigned int i; 604 bool found = false; 605 606 target_dev = tcf_mirred_dev(a); 607 for_each_port(adap, i) { 608 n_dev = adap->port[i]; 609 if (target_dev == n_dev) { 610 found = true; 611 break; 612 } 613 } 614 615 /* If interface doesn't belong to our hw, then 616 * the provided output port is not valid 617 */ 618 if (!found) { 619 netdev_err(dev, "%s: Out port invalid\n", 620 __func__); 621 return -EINVAL; 622 } 623 act_redir = true; 624 } else if (is_tcf_vlan(a)) { 625 u16 proto = be16_to_cpu(tcf_vlan_push_proto(a)); 626 u32 vlan_action = tcf_vlan_action(a); 627 628 switch (vlan_action) { 629 case TCA_VLAN_ACT_POP: 630 break; 631 case TCA_VLAN_ACT_PUSH: 632 case TCA_VLAN_ACT_MODIFY: 633 if (proto != ETH_P_8021Q) { 634 netdev_err(dev, "%s: Unsupported vlan proto\n", 635 __func__); 636 return -EOPNOTSUPP; 637 } 638 break; 639 default: 640 netdev_err(dev, "%s: Unsupported vlan action\n", 641 __func__); 642 return -EOPNOTSUPP; 643 } 644 act_vlan = true; 645 } else if (is_tcf_pedit(a)) { 646 bool pedit_valid = valid_pedit_action(dev, a); 647 648 if (!pedit_valid) 649 return -EOPNOTSUPP; 650 act_pedit = true; 651 } else { 652 netdev_err(dev, "%s: Unsupported action\n", __func__); 653 return -EOPNOTSUPP; 654 } 655 } 656 657 if ((act_pedit || act_vlan) && !act_redir) { 658 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n", 659 __func__); 660 return -EINVAL; 661 } 662 663 return 0; 664 } 665 666 int cxgb4_tc_flower_replace(struct net_device *dev, 667 struct tc_cls_flower_offload *cls) 668 { 669 struct adapter *adap = netdev2adap(dev); 670 struct ch_tc_flower_entry *ch_flower; 671 struct ch_filter_specification *fs; 672 struct filter_ctx ctx; 673 int fidx; 674 int ret; 675 676 if (cxgb4_validate_flow_actions(dev, cls)) 677 return -EOPNOTSUPP; 678 679 if (cxgb4_validate_flow_match(dev, cls)) 680 return -EOPNOTSUPP; 681 682 ch_flower = allocate_flower_entry(); 683 if (!ch_flower) { 684 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__); 685 return -ENOMEM; 686 } 687 688 fs = &ch_flower->fs; 689 fs->hitcnts = 1; 690 cxgb4_process_flow_match(dev, cls, fs); 691 cxgb4_process_flow_actions(dev, cls, fs); 692 693 fs->hash = is_filter_exact_match(adap, fs); 694 if (fs->hash) { 695 fidx = 0; 696 } else { 697 fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET); 698 if (fidx < 0) { 699 netdev_err(dev, "%s: No fidx for offload.\n", __func__); 700 ret = -ENOMEM; 701 goto free_entry; 702 } 703 } 704 705 init_completion(&ctx.completion); 706 ret = __cxgb4_set_filter(dev, fidx, fs, &ctx); 707 if (ret) { 708 netdev_err(dev, "%s: filter creation err %d\n", 709 __func__, ret); 710 goto free_entry; 711 } 712 713 /* Wait for reply */ 714 ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); 715 if (!ret) { 716 ret = -ETIMEDOUT; 717 goto free_entry; 718 } 719 720 ret = ctx.result; 721 /* Check if hw returned error for filter creation */ 722 if (ret) { 723 netdev_err(dev, "%s: filter creation err %d\n", 724 __func__, ret); 725 goto free_entry; 726 } 727 728 ch_flower->tc_flower_cookie = cls->cookie; 729 ch_flower->filter_id = ctx.tid; 730 ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node, 731 adap->flower_ht_params); 732 if (ret) 733 goto del_filter; 734 735 return 0; 736 737 del_filter: 738 cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 739 740 free_entry: 741 kfree(ch_flower); 742 return ret; 743 } 744 745 int cxgb4_tc_flower_destroy(struct net_device *dev, 746 struct tc_cls_flower_offload *cls) 747 { 748 struct adapter *adap = netdev2adap(dev); 749 struct ch_tc_flower_entry *ch_flower; 750 int ret; 751 752 ch_flower = ch_flower_lookup(adap, cls->cookie); 753 if (!ch_flower) 754 return -ENOENT; 755 756 ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 757 if (ret) 758 goto err; 759 760 ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node, 761 adap->flower_ht_params); 762 if (ret) { 763 netdev_err(dev, "Flow remove from rhashtable failed"); 764 goto err; 765 } 766 kfree_rcu(ch_flower, rcu); 767 768 err: 769 return ret; 770 } 771 772 static void ch_flower_stats_handler(struct work_struct *work) 773 { 774 struct adapter *adap = container_of(work, struct adapter, 775 flower_stats_work); 776 struct ch_tc_flower_entry *flower_entry; 777 struct ch_tc_flower_stats *ofld_stats; 778 struct rhashtable_iter iter; 779 u64 packets; 780 u64 bytes; 781 int ret; 782 783 rhashtable_walk_enter(&adap->flower_tbl, &iter); 784 do { 785 rhashtable_walk_start(&iter); 786 787 while ((flower_entry = rhashtable_walk_next(&iter)) && 788 !IS_ERR(flower_entry)) { 789 ret = cxgb4_get_filter_counters(adap->port[0], 790 flower_entry->filter_id, 791 &packets, &bytes, 792 flower_entry->fs.hash); 793 if (!ret) { 794 spin_lock(&flower_entry->lock); 795 ofld_stats = &flower_entry->stats; 796 797 if (ofld_stats->prev_packet_count != packets) { 798 ofld_stats->prev_packet_count = packets; 799 ofld_stats->last_used = jiffies; 800 } 801 spin_unlock(&flower_entry->lock); 802 } 803 } 804 805 rhashtable_walk_stop(&iter); 806 807 } while (flower_entry == ERR_PTR(-EAGAIN)); 808 rhashtable_walk_exit(&iter); 809 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 810 } 811 812 static void ch_flower_stats_cb(struct timer_list *t) 813 { 814 struct adapter *adap = from_timer(adap, t, flower_stats_timer); 815 816 schedule_work(&adap->flower_stats_work); 817 } 818 819 int cxgb4_tc_flower_stats(struct net_device *dev, 820 struct tc_cls_flower_offload *cls) 821 { 822 struct adapter *adap = netdev2adap(dev); 823 struct ch_tc_flower_stats *ofld_stats; 824 struct ch_tc_flower_entry *ch_flower; 825 u64 packets; 826 u64 bytes; 827 int ret; 828 829 ch_flower = ch_flower_lookup(adap, cls->cookie); 830 if (!ch_flower) { 831 ret = -ENOENT; 832 goto err; 833 } 834 835 ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id, 836 &packets, &bytes, 837 ch_flower->fs.hash); 838 if (ret < 0) 839 goto err; 840 841 spin_lock_bh(&ch_flower->lock); 842 ofld_stats = &ch_flower->stats; 843 if (ofld_stats->packet_count != packets) { 844 if (ofld_stats->prev_packet_count != packets) 845 ofld_stats->last_used = jiffies; 846 tcf_exts_stats_update(cls->exts, bytes - ofld_stats->byte_count, 847 packets - ofld_stats->packet_count, 848 ofld_stats->last_used); 849 850 ofld_stats->packet_count = packets; 851 ofld_stats->byte_count = bytes; 852 ofld_stats->prev_packet_count = packets; 853 } 854 spin_unlock_bh(&ch_flower->lock); 855 return 0; 856 857 err: 858 return ret; 859 } 860 861 static const struct rhashtable_params cxgb4_tc_flower_ht_params = { 862 .nelem_hint = 384, 863 .head_offset = offsetof(struct ch_tc_flower_entry, node), 864 .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie), 865 .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie), 866 .max_size = 524288, 867 .min_size = 512, 868 .automatic_shrinking = true 869 }; 870 871 int cxgb4_init_tc_flower(struct adapter *adap) 872 { 873 int ret; 874 875 if (adap->tc_flower_initialized) 876 return -EEXIST; 877 878 adap->flower_ht_params = cxgb4_tc_flower_ht_params; 879 ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params); 880 if (ret) 881 return ret; 882 883 INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler); 884 timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0); 885 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 886 adap->tc_flower_initialized = true; 887 return 0; 888 } 889 890 void cxgb4_cleanup_tc_flower(struct adapter *adap) 891 { 892 if (!adap->tc_flower_initialized) 893 return; 894 895 if (adap->flower_stats_timer.function) 896 del_timer_sync(&adap->flower_stats_timer); 897 cancel_work_sync(&adap->flower_stats_work); 898 rhashtable_destroy(&adap->flower_tbl); 899 adap->tc_flower_initialized = false; 900 } 901