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 struct flow_rule *rule = tc_cls_flower_offload_flow_rule(cls); 87 u16 addr_type = 0; 88 89 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 90 struct flow_match_control match; 91 92 flow_rule_match_control(rule, &match); 93 addr_type = match.key->addr_type; 94 } 95 96 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 97 struct flow_match_basic match; 98 u16 ethtype_key, ethtype_mask; 99 100 flow_rule_match_basic(rule, &match); 101 ethtype_key = ntohs(match.key->n_proto); 102 ethtype_mask = ntohs(match.mask->n_proto); 103 104 if (ethtype_key == ETH_P_ALL) { 105 ethtype_key = 0; 106 ethtype_mask = 0; 107 } 108 109 if (ethtype_key == ETH_P_IPV6) 110 fs->type = 1; 111 112 fs->val.ethtype = ethtype_key; 113 fs->mask.ethtype = ethtype_mask; 114 fs->val.proto = match.key->ip_proto; 115 fs->mask.proto = match.mask->ip_proto; 116 } 117 118 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 119 struct flow_match_ipv4_addrs match; 120 121 flow_rule_match_ipv4_addrs(rule, &match); 122 fs->type = 0; 123 memcpy(&fs->val.lip[0], &match.key->dst, sizeof(match.key->dst)); 124 memcpy(&fs->val.fip[0], &match.key->src, sizeof(match.key->src)); 125 memcpy(&fs->mask.lip[0], &match.mask->dst, sizeof(match.mask->dst)); 126 memcpy(&fs->mask.fip[0], &match.mask->src, sizeof(match.mask->src)); 127 128 /* also initialize nat_lip/fip to same values */ 129 memcpy(&fs->nat_lip[0], &match.key->dst, sizeof(match.key->dst)); 130 memcpy(&fs->nat_fip[0], &match.key->src, sizeof(match.key->src)); 131 } 132 133 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 134 struct flow_match_ipv6_addrs match; 135 136 flow_rule_match_ipv6_addrs(rule, &match); 137 fs->type = 1; 138 memcpy(&fs->val.lip[0], match.key->dst.s6_addr, 139 sizeof(match.key->dst)); 140 memcpy(&fs->val.fip[0], match.key->src.s6_addr, 141 sizeof(match.key->src)); 142 memcpy(&fs->mask.lip[0], match.mask->dst.s6_addr, 143 sizeof(match.mask->dst)); 144 memcpy(&fs->mask.fip[0], match.mask->src.s6_addr, 145 sizeof(match.mask->src)); 146 147 /* also initialize nat_lip/fip to same values */ 148 memcpy(&fs->nat_lip[0], match.key->dst.s6_addr, 149 sizeof(match.key->dst)); 150 memcpy(&fs->nat_fip[0], match.key->src.s6_addr, 151 sizeof(match.key->src)); 152 } 153 154 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 155 struct flow_match_ports match; 156 157 flow_rule_match_ports(rule, &match); 158 fs->val.lport = cpu_to_be16(match.key->dst); 159 fs->mask.lport = cpu_to_be16(match.mask->dst); 160 fs->val.fport = cpu_to_be16(match.key->src); 161 fs->mask.fport = cpu_to_be16(match.mask->src); 162 163 /* also initialize nat_lport/fport to same values */ 164 fs->nat_lport = cpu_to_be16(match.key->dst); 165 fs->nat_fport = cpu_to_be16(match.key->src); 166 } 167 168 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) { 169 struct flow_match_ip match; 170 171 flow_rule_match_ip(rule, &match); 172 fs->val.tos = match.key->tos; 173 fs->mask.tos = match.mask->tos; 174 } 175 176 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) { 177 struct flow_match_enc_keyid match; 178 179 flow_rule_match_enc_keyid(rule, &match); 180 fs->val.vni = be32_to_cpu(match.key->keyid); 181 fs->mask.vni = be32_to_cpu(match.mask->keyid); 182 if (fs->mask.vni) { 183 fs->val.encap_vld = 1; 184 fs->mask.encap_vld = 1; 185 } 186 } 187 188 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 189 struct flow_match_vlan match; 190 u16 vlan_tci, vlan_tci_mask; 191 192 flow_rule_match_vlan(rule, &match); 193 vlan_tci = match.key->vlan_id | (match.key->vlan_priority << 194 VLAN_PRIO_SHIFT); 195 vlan_tci_mask = match.mask->vlan_id | (match.mask->vlan_priority << 196 VLAN_PRIO_SHIFT); 197 fs->val.ivlan = vlan_tci; 198 fs->mask.ivlan = vlan_tci_mask; 199 200 /* Chelsio adapters use ivlan_vld bit to match vlan packets 201 * as 802.1Q. Also, when vlan tag is present in packets, 202 * ethtype match is used then to match on ethtype of inner 203 * header ie. the header following the vlan header. 204 * So, set the ivlan_vld based on ethtype info supplied by 205 * TC for vlan packets if its 802.1Q. And then reset the 206 * ethtype value else, hw will try to match the supplied 207 * ethtype value with ethtype of inner header. 208 */ 209 if (fs->val.ethtype == ETH_P_8021Q) { 210 fs->val.ivlan_vld = 1; 211 fs->mask.ivlan_vld = 1; 212 fs->val.ethtype = 0; 213 fs->mask.ethtype = 0; 214 } 215 } 216 217 /* Match only packets coming from the ingress port where this 218 * filter will be created. 219 */ 220 fs->val.iport = netdev2pinfo(dev)->port_id; 221 fs->mask.iport = ~0; 222 } 223 224 static int cxgb4_validate_flow_match(struct net_device *dev, 225 struct tc_cls_flower_offload *cls) 226 { 227 struct flow_rule *rule = tc_cls_flower_offload_flow_rule(cls); 228 struct flow_dissector *dissector = rule->match.dissector; 229 u16 ethtype_mask = 0; 230 u16 ethtype_key = 0; 231 232 if (dissector->used_keys & 233 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | 234 BIT(FLOW_DISSECTOR_KEY_BASIC) | 235 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | 236 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | 237 BIT(FLOW_DISSECTOR_KEY_PORTS) | 238 BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | 239 BIT(FLOW_DISSECTOR_KEY_VLAN) | 240 BIT(FLOW_DISSECTOR_KEY_IP))) { 241 netdev_warn(dev, "Unsupported key used: 0x%x\n", 242 dissector->used_keys); 243 return -EOPNOTSUPP; 244 } 245 246 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 247 struct flow_match_basic match; 248 249 flow_rule_match_basic(rule, &match); 250 ethtype_key = ntohs(match.key->n_proto); 251 ethtype_mask = ntohs(match.mask->n_proto); 252 } 253 254 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) { 255 u16 eth_ip_type = ethtype_key & ethtype_mask; 256 struct flow_match_ip match; 257 258 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) { 259 netdev_err(dev, "IP Key supported only with IPv4/v6"); 260 return -EINVAL; 261 } 262 263 flow_rule_match_ip(rule, &match); 264 if (match.mask->ttl) { 265 netdev_warn(dev, "ttl match unsupported for offload"); 266 return -EOPNOTSUPP; 267 } 268 } 269 270 return 0; 271 } 272 273 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask, 274 u8 field) 275 { 276 u32 set_val = val & ~mask; 277 u32 offset = 0; 278 u8 size = 1; 279 int i; 280 281 for (i = 0; i < ARRAY_SIZE(pedits); i++) { 282 if (pedits[i].field == field) { 283 offset = pedits[i].offset; 284 size = pedits[i].size; 285 break; 286 } 287 } 288 memcpy((u8 *)fs + offset, &set_val, size); 289 } 290 291 static void process_pedit_field(struct ch_filter_specification *fs, u32 val, 292 u32 mask, u32 offset, u8 htype) 293 { 294 switch (htype) { 295 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 296 switch (offset) { 297 case PEDIT_ETH_DMAC_31_0: 298 fs->newdmac = 1; 299 offload_pedit(fs, val, mask, ETH_DMAC_31_0); 300 break; 301 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 302 if (~mask & PEDIT_ETH_DMAC_MASK) 303 offload_pedit(fs, val, mask, ETH_DMAC_47_32); 304 else 305 offload_pedit(fs, val >> 16, mask >> 16, 306 ETH_SMAC_15_0); 307 break; 308 case PEDIT_ETH_SMAC_47_16: 309 fs->newsmac = 1; 310 offload_pedit(fs, val, mask, ETH_SMAC_47_16); 311 } 312 break; 313 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 314 switch (offset) { 315 case PEDIT_IP4_SRC: 316 offload_pedit(fs, val, mask, IP4_SRC); 317 break; 318 case PEDIT_IP4_DST: 319 offload_pedit(fs, val, mask, IP4_DST); 320 } 321 fs->nat_mode = NAT_MODE_ALL; 322 break; 323 case FLOW_ACT_MANGLE_HDR_TYPE_IP6: 324 switch (offset) { 325 case PEDIT_IP6_SRC_31_0: 326 offload_pedit(fs, val, mask, IP6_SRC_31_0); 327 break; 328 case PEDIT_IP6_SRC_63_32: 329 offload_pedit(fs, val, mask, IP6_SRC_63_32); 330 break; 331 case PEDIT_IP6_SRC_95_64: 332 offload_pedit(fs, val, mask, IP6_SRC_95_64); 333 break; 334 case PEDIT_IP6_SRC_127_96: 335 offload_pedit(fs, val, mask, IP6_SRC_127_96); 336 break; 337 case PEDIT_IP6_DST_31_0: 338 offload_pedit(fs, val, mask, IP6_DST_31_0); 339 break; 340 case PEDIT_IP6_DST_63_32: 341 offload_pedit(fs, val, mask, IP6_DST_63_32); 342 break; 343 case PEDIT_IP6_DST_95_64: 344 offload_pedit(fs, val, mask, IP6_DST_95_64); 345 break; 346 case PEDIT_IP6_DST_127_96: 347 offload_pedit(fs, val, mask, IP6_DST_127_96); 348 } 349 fs->nat_mode = NAT_MODE_ALL; 350 break; 351 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 352 switch (offset) { 353 case PEDIT_TCP_SPORT_DPORT: 354 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 355 offload_pedit(fs, cpu_to_be32(val) >> 16, 356 cpu_to_be32(mask) >> 16, 357 TCP_SPORT); 358 else 359 offload_pedit(fs, cpu_to_be32(val), 360 cpu_to_be32(mask), TCP_DPORT); 361 } 362 fs->nat_mode = NAT_MODE_ALL; 363 break; 364 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 365 switch (offset) { 366 case PEDIT_UDP_SPORT_DPORT: 367 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 368 offload_pedit(fs, cpu_to_be32(val) >> 16, 369 cpu_to_be32(mask) >> 16, 370 UDP_SPORT); 371 else 372 offload_pedit(fs, cpu_to_be32(val), 373 cpu_to_be32(mask), UDP_DPORT); 374 } 375 fs->nat_mode = NAT_MODE_ALL; 376 } 377 } 378 379 static void cxgb4_process_flow_actions(struct net_device *in, 380 struct tc_cls_flower_offload *cls, 381 struct ch_filter_specification *fs) 382 { 383 struct flow_rule *rule = tc_cls_flower_offload_flow_rule(cls); 384 struct flow_action_entry *act; 385 int i; 386 387 flow_action_for_each(i, act, &rule->action) { 388 switch (act->id) { 389 case FLOW_ACTION_ACCEPT: 390 fs->action = FILTER_PASS; 391 break; 392 case FLOW_ACTION_DROP: 393 fs->action = FILTER_DROP; 394 break; 395 case FLOW_ACTION_REDIRECT: { 396 struct net_device *out = act->dev; 397 struct port_info *pi = netdev_priv(out); 398 399 fs->action = FILTER_SWITCH; 400 fs->eport = pi->port_id; 401 } 402 break; 403 case FLOW_ACTION_VLAN_POP: 404 case FLOW_ACTION_VLAN_PUSH: 405 case FLOW_ACTION_VLAN_MANGLE: { 406 u8 prio = act->vlan.prio; 407 u16 vid = act->vlan.vid; 408 u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid; 409 switch (act->id) { 410 case FLOW_ACTION_VLAN_POP: 411 fs->newvlan |= VLAN_REMOVE; 412 break; 413 case FLOW_ACTION_VLAN_PUSH: 414 fs->newvlan |= VLAN_INSERT; 415 fs->vlan = vlan_tci; 416 break; 417 case FLOW_ACTION_VLAN_MANGLE: 418 fs->newvlan |= VLAN_REWRITE; 419 fs->vlan = vlan_tci; 420 break; 421 default: 422 break; 423 } 424 } 425 break; 426 case FLOW_ACTION_MANGLE: { 427 u32 mask, val, offset; 428 u8 htype; 429 430 htype = act->mangle.htype; 431 mask = act->mangle.mask; 432 val = act->mangle.val; 433 offset = act->mangle.offset; 434 435 process_pedit_field(fs, val, mask, offset, htype); 436 } 437 break; 438 default: 439 break; 440 } 441 } 442 } 443 444 static bool valid_l4_mask(u32 mask) 445 { 446 u16 hi, lo; 447 448 /* Either the upper 16-bits (SPORT) OR the lower 449 * 16-bits (DPORT) can be set, but NOT BOTH. 450 */ 451 hi = (mask >> 16) & 0xFFFF; 452 lo = mask & 0xFFFF; 453 454 return hi && lo ? false : true; 455 } 456 457 static bool valid_pedit_action(struct net_device *dev, 458 const struct flow_action_entry *act) 459 { 460 u32 mask, offset; 461 u8 htype; 462 463 htype = act->mangle.htype; 464 mask = act->mangle.mask; 465 offset = act->mangle.offset; 466 467 switch (htype) { 468 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 469 switch (offset) { 470 case PEDIT_ETH_DMAC_31_0: 471 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 472 case PEDIT_ETH_SMAC_47_16: 473 break; 474 default: 475 netdev_err(dev, "%s: Unsupported pedit field\n", 476 __func__); 477 return false; 478 } 479 break; 480 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 481 switch (offset) { 482 case PEDIT_IP4_SRC: 483 case PEDIT_IP4_DST: 484 break; 485 default: 486 netdev_err(dev, "%s: Unsupported pedit field\n", 487 __func__); 488 return false; 489 } 490 break; 491 case FLOW_ACT_MANGLE_HDR_TYPE_IP6: 492 switch (offset) { 493 case PEDIT_IP6_SRC_31_0: 494 case PEDIT_IP6_SRC_63_32: 495 case PEDIT_IP6_SRC_95_64: 496 case PEDIT_IP6_SRC_127_96: 497 case PEDIT_IP6_DST_31_0: 498 case PEDIT_IP6_DST_63_32: 499 case PEDIT_IP6_DST_95_64: 500 case PEDIT_IP6_DST_127_96: 501 break; 502 default: 503 netdev_err(dev, "%s: Unsupported pedit field\n", 504 __func__); 505 return false; 506 } 507 break; 508 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 509 switch (offset) { 510 case PEDIT_TCP_SPORT_DPORT: 511 if (!valid_l4_mask(~mask)) { 512 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n", 513 __func__); 514 return false; 515 } 516 break; 517 default: 518 netdev_err(dev, "%s: Unsupported pedit field\n", 519 __func__); 520 return false; 521 } 522 break; 523 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 524 switch (offset) { 525 case PEDIT_UDP_SPORT_DPORT: 526 if (!valid_l4_mask(~mask)) { 527 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n", 528 __func__); 529 return false; 530 } 531 break; 532 default: 533 netdev_err(dev, "%s: Unsupported pedit field\n", 534 __func__); 535 return false; 536 } 537 break; 538 default: 539 netdev_err(dev, "%s: Unsupported pedit type\n", __func__); 540 return false; 541 } 542 return true; 543 } 544 545 static int cxgb4_validate_flow_actions(struct net_device *dev, 546 struct tc_cls_flower_offload *cls) 547 { 548 struct flow_rule *rule = tc_cls_flower_offload_flow_rule(cls); 549 struct flow_action_entry *act; 550 bool act_redir = false; 551 bool act_pedit = false; 552 bool act_vlan = false; 553 int i; 554 555 flow_action_for_each(i, act, &rule->action) { 556 switch (act->id) { 557 case FLOW_ACTION_ACCEPT: 558 case FLOW_ACTION_DROP: 559 /* Do nothing */ 560 break; 561 case FLOW_ACTION_REDIRECT: { 562 struct adapter *adap = netdev2adap(dev); 563 struct net_device *n_dev, *target_dev; 564 unsigned int i; 565 bool found = false; 566 567 target_dev = act->dev; 568 for_each_port(adap, i) { 569 n_dev = adap->port[i]; 570 if (target_dev == n_dev) { 571 found = true; 572 break; 573 } 574 } 575 576 /* If interface doesn't belong to our hw, then 577 * the provided output port is not valid 578 */ 579 if (!found) { 580 netdev_err(dev, "%s: Out port invalid\n", 581 __func__); 582 return -EINVAL; 583 } 584 act_redir = true; 585 } 586 break; 587 case FLOW_ACTION_VLAN_POP: 588 case FLOW_ACTION_VLAN_PUSH: 589 case FLOW_ACTION_VLAN_MANGLE: { 590 u16 proto = be16_to_cpu(act->vlan.proto); 591 592 switch (act->id) { 593 case FLOW_ACTION_VLAN_POP: 594 break; 595 case FLOW_ACTION_VLAN_PUSH: 596 case FLOW_ACTION_VLAN_MANGLE: 597 if (proto != ETH_P_8021Q) { 598 netdev_err(dev, "%s: Unsupported vlan proto\n", 599 __func__); 600 return -EOPNOTSUPP; 601 } 602 break; 603 default: 604 netdev_err(dev, "%s: Unsupported vlan action\n", 605 __func__); 606 return -EOPNOTSUPP; 607 } 608 act_vlan = true; 609 } 610 break; 611 case FLOW_ACTION_MANGLE: { 612 bool pedit_valid = valid_pedit_action(dev, act); 613 614 if (!pedit_valid) 615 return -EOPNOTSUPP; 616 act_pedit = true; 617 } 618 break; 619 default: 620 netdev_err(dev, "%s: Unsupported action\n", __func__); 621 return -EOPNOTSUPP; 622 } 623 } 624 625 if ((act_pedit || act_vlan) && !act_redir) { 626 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n", 627 __func__); 628 return -EINVAL; 629 } 630 631 return 0; 632 } 633 634 int cxgb4_tc_flower_replace(struct net_device *dev, 635 struct tc_cls_flower_offload *cls) 636 { 637 struct adapter *adap = netdev2adap(dev); 638 struct ch_tc_flower_entry *ch_flower; 639 struct ch_filter_specification *fs; 640 struct filter_ctx ctx; 641 int fidx; 642 int ret; 643 644 if (cxgb4_validate_flow_actions(dev, cls)) 645 return -EOPNOTSUPP; 646 647 if (cxgb4_validate_flow_match(dev, cls)) 648 return -EOPNOTSUPP; 649 650 ch_flower = allocate_flower_entry(); 651 if (!ch_flower) { 652 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__); 653 return -ENOMEM; 654 } 655 656 fs = &ch_flower->fs; 657 fs->hitcnts = 1; 658 cxgb4_process_flow_match(dev, cls, fs); 659 cxgb4_process_flow_actions(dev, cls, fs); 660 661 fs->hash = is_filter_exact_match(adap, fs); 662 if (fs->hash) { 663 fidx = 0; 664 } else { 665 fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET); 666 if (fidx < 0) { 667 netdev_err(dev, "%s: No fidx for offload.\n", __func__); 668 ret = -ENOMEM; 669 goto free_entry; 670 } 671 } 672 673 init_completion(&ctx.completion); 674 ret = __cxgb4_set_filter(dev, fidx, fs, &ctx); 675 if (ret) { 676 netdev_err(dev, "%s: filter creation err %d\n", 677 __func__, ret); 678 goto free_entry; 679 } 680 681 /* Wait for reply */ 682 ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); 683 if (!ret) { 684 ret = -ETIMEDOUT; 685 goto free_entry; 686 } 687 688 ret = ctx.result; 689 /* Check if hw returned error for filter creation */ 690 if (ret) { 691 netdev_err(dev, "%s: filter creation err %d\n", 692 __func__, ret); 693 goto free_entry; 694 } 695 696 ch_flower->tc_flower_cookie = cls->cookie; 697 ch_flower->filter_id = ctx.tid; 698 ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node, 699 adap->flower_ht_params); 700 if (ret) 701 goto del_filter; 702 703 return 0; 704 705 del_filter: 706 cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 707 708 free_entry: 709 kfree(ch_flower); 710 return ret; 711 } 712 713 int cxgb4_tc_flower_destroy(struct net_device *dev, 714 struct tc_cls_flower_offload *cls) 715 { 716 struct adapter *adap = netdev2adap(dev); 717 struct ch_tc_flower_entry *ch_flower; 718 int ret; 719 720 ch_flower = ch_flower_lookup(adap, cls->cookie); 721 if (!ch_flower) 722 return -ENOENT; 723 724 ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 725 if (ret) 726 goto err; 727 728 ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node, 729 adap->flower_ht_params); 730 if (ret) { 731 netdev_err(dev, "Flow remove from rhashtable failed"); 732 goto err; 733 } 734 kfree_rcu(ch_flower, rcu); 735 736 err: 737 return ret; 738 } 739 740 static void ch_flower_stats_handler(struct work_struct *work) 741 { 742 struct adapter *adap = container_of(work, struct adapter, 743 flower_stats_work); 744 struct ch_tc_flower_entry *flower_entry; 745 struct ch_tc_flower_stats *ofld_stats; 746 struct rhashtable_iter iter; 747 u64 packets; 748 u64 bytes; 749 int ret; 750 751 rhashtable_walk_enter(&adap->flower_tbl, &iter); 752 do { 753 rhashtable_walk_start(&iter); 754 755 while ((flower_entry = rhashtable_walk_next(&iter)) && 756 !IS_ERR(flower_entry)) { 757 ret = cxgb4_get_filter_counters(adap->port[0], 758 flower_entry->filter_id, 759 &packets, &bytes, 760 flower_entry->fs.hash); 761 if (!ret) { 762 spin_lock(&flower_entry->lock); 763 ofld_stats = &flower_entry->stats; 764 765 if (ofld_stats->prev_packet_count != packets) { 766 ofld_stats->prev_packet_count = packets; 767 ofld_stats->last_used = jiffies; 768 } 769 spin_unlock(&flower_entry->lock); 770 } 771 } 772 773 rhashtable_walk_stop(&iter); 774 775 } while (flower_entry == ERR_PTR(-EAGAIN)); 776 rhashtable_walk_exit(&iter); 777 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 778 } 779 780 static void ch_flower_stats_cb(struct timer_list *t) 781 { 782 struct adapter *adap = from_timer(adap, t, flower_stats_timer); 783 784 schedule_work(&adap->flower_stats_work); 785 } 786 787 int cxgb4_tc_flower_stats(struct net_device *dev, 788 struct tc_cls_flower_offload *cls) 789 { 790 struct adapter *adap = netdev2adap(dev); 791 struct ch_tc_flower_stats *ofld_stats; 792 struct ch_tc_flower_entry *ch_flower; 793 u64 packets; 794 u64 bytes; 795 int ret; 796 797 ch_flower = ch_flower_lookup(adap, cls->cookie); 798 if (!ch_flower) { 799 ret = -ENOENT; 800 goto err; 801 } 802 803 ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id, 804 &packets, &bytes, 805 ch_flower->fs.hash); 806 if (ret < 0) 807 goto err; 808 809 spin_lock_bh(&ch_flower->lock); 810 ofld_stats = &ch_flower->stats; 811 if (ofld_stats->packet_count != packets) { 812 if (ofld_stats->prev_packet_count != packets) 813 ofld_stats->last_used = jiffies; 814 flow_stats_update(&cls->stats, bytes - ofld_stats->byte_count, 815 packets - ofld_stats->packet_count, 816 ofld_stats->last_used); 817 818 ofld_stats->packet_count = packets; 819 ofld_stats->byte_count = bytes; 820 ofld_stats->prev_packet_count = packets; 821 } 822 spin_unlock_bh(&ch_flower->lock); 823 return 0; 824 825 err: 826 return ret; 827 } 828 829 static const struct rhashtable_params cxgb4_tc_flower_ht_params = { 830 .nelem_hint = 384, 831 .head_offset = offsetof(struct ch_tc_flower_entry, node), 832 .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie), 833 .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie), 834 .max_size = 524288, 835 .min_size = 512, 836 .automatic_shrinking = true 837 }; 838 839 int cxgb4_init_tc_flower(struct adapter *adap) 840 { 841 int ret; 842 843 if (adap->tc_flower_initialized) 844 return -EEXIST; 845 846 adap->flower_ht_params = cxgb4_tc_flower_ht_params; 847 ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params); 848 if (ret) 849 return ret; 850 851 INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler); 852 timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0); 853 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 854 adap->tc_flower_initialized = true; 855 return 0; 856 } 857 858 void cxgb4_cleanup_tc_flower(struct adapter *adap) 859 { 860 if (!adap->tc_flower_initialized) 861 return; 862 863 if (adap->flower_stats_timer.function) 864 del_timer_sync(&adap->flower_stats_timer); 865 cancel_work_sync(&adap->flower_stats_work); 866 rhashtable_destroy(&adap->flower_tbl); 867 adap->tc_flower_initialized = false; 868 } 869