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 if (new) 71 spin_lock_init(&new->lock); 72 return new; 73 } 74 75 /* Must be called with either RTNL or rcu_read_lock */ 76 static struct ch_tc_flower_entry *ch_flower_lookup(struct adapter *adap, 77 unsigned long flower_cookie) 78 { 79 return rhashtable_lookup_fast(&adap->flower_tbl, &flower_cookie, 80 adap->flower_ht_params); 81 } 82 83 static void cxgb4_process_flow_match(struct net_device *dev, 84 struct flow_cls_offload *cls, 85 struct ch_filter_specification *fs) 86 { 87 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 88 u16 addr_type = 0; 89 90 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 91 struct flow_match_control match; 92 93 flow_rule_match_control(rule, &match); 94 addr_type = match.key->addr_type; 95 } 96 97 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 98 struct flow_match_basic match; 99 u16 ethtype_key, ethtype_mask; 100 101 flow_rule_match_basic(rule, &match); 102 ethtype_key = ntohs(match.key->n_proto); 103 ethtype_mask = ntohs(match.mask->n_proto); 104 105 if (ethtype_key == ETH_P_ALL) { 106 ethtype_key = 0; 107 ethtype_mask = 0; 108 } 109 110 if (ethtype_key == ETH_P_IPV6) 111 fs->type = 1; 112 113 fs->val.ethtype = ethtype_key; 114 fs->mask.ethtype = ethtype_mask; 115 fs->val.proto = match.key->ip_proto; 116 fs->mask.proto = match.mask->ip_proto; 117 } 118 119 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 120 struct flow_match_ipv4_addrs match; 121 122 flow_rule_match_ipv4_addrs(rule, &match); 123 fs->type = 0; 124 memcpy(&fs->val.lip[0], &match.key->dst, sizeof(match.key->dst)); 125 memcpy(&fs->val.fip[0], &match.key->src, sizeof(match.key->src)); 126 memcpy(&fs->mask.lip[0], &match.mask->dst, sizeof(match.mask->dst)); 127 memcpy(&fs->mask.fip[0], &match.mask->src, sizeof(match.mask->src)); 128 129 /* also initialize nat_lip/fip to same values */ 130 memcpy(&fs->nat_lip[0], &match.key->dst, sizeof(match.key->dst)); 131 memcpy(&fs->nat_fip[0], &match.key->src, sizeof(match.key->src)); 132 } 133 134 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 135 struct flow_match_ipv6_addrs match; 136 137 flow_rule_match_ipv6_addrs(rule, &match); 138 fs->type = 1; 139 memcpy(&fs->val.lip[0], match.key->dst.s6_addr, 140 sizeof(match.key->dst)); 141 memcpy(&fs->val.fip[0], match.key->src.s6_addr, 142 sizeof(match.key->src)); 143 memcpy(&fs->mask.lip[0], match.mask->dst.s6_addr, 144 sizeof(match.mask->dst)); 145 memcpy(&fs->mask.fip[0], match.mask->src.s6_addr, 146 sizeof(match.mask->src)); 147 148 /* also initialize nat_lip/fip to same values */ 149 memcpy(&fs->nat_lip[0], match.key->dst.s6_addr, 150 sizeof(match.key->dst)); 151 memcpy(&fs->nat_fip[0], match.key->src.s6_addr, 152 sizeof(match.key->src)); 153 } 154 155 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 156 struct flow_match_ports match; 157 158 flow_rule_match_ports(rule, &match); 159 fs->val.lport = cpu_to_be16(match.key->dst); 160 fs->mask.lport = cpu_to_be16(match.mask->dst); 161 fs->val.fport = cpu_to_be16(match.key->src); 162 fs->mask.fport = cpu_to_be16(match.mask->src); 163 164 /* also initialize nat_lport/fport to same values */ 165 fs->nat_lport = cpu_to_be16(match.key->dst); 166 fs->nat_fport = cpu_to_be16(match.key->src); 167 } 168 169 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) { 170 struct flow_match_ip match; 171 172 flow_rule_match_ip(rule, &match); 173 fs->val.tos = match.key->tos; 174 fs->mask.tos = match.mask->tos; 175 } 176 177 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) { 178 struct flow_match_enc_keyid match; 179 180 flow_rule_match_enc_keyid(rule, &match); 181 fs->val.vni = be32_to_cpu(match.key->keyid); 182 fs->mask.vni = be32_to_cpu(match.mask->keyid); 183 if (fs->mask.vni) { 184 fs->val.encap_vld = 1; 185 fs->mask.encap_vld = 1; 186 } 187 } 188 189 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 190 struct flow_match_vlan match; 191 u16 vlan_tci, vlan_tci_mask; 192 193 flow_rule_match_vlan(rule, &match); 194 vlan_tci = match.key->vlan_id | (match.key->vlan_priority << 195 VLAN_PRIO_SHIFT); 196 vlan_tci_mask = match.mask->vlan_id | (match.mask->vlan_priority << 197 VLAN_PRIO_SHIFT); 198 fs->val.ivlan = vlan_tci; 199 fs->mask.ivlan = vlan_tci_mask; 200 201 fs->val.ivlan_vld = 1; 202 fs->mask.ivlan_vld = 1; 203 204 /* Chelsio adapters use ivlan_vld bit to match vlan packets 205 * as 802.1Q. Also, when vlan tag is present in packets, 206 * ethtype match is used then to match on ethtype of inner 207 * header ie. the header following the vlan header. 208 * So, set the ivlan_vld based on ethtype info supplied by 209 * TC for vlan packets if its 802.1Q. And then reset the 210 * ethtype value else, hw will try to match the supplied 211 * ethtype value with ethtype of inner header. 212 */ 213 if (fs->val.ethtype == ETH_P_8021Q) { 214 fs->val.ethtype = 0; 215 fs->mask.ethtype = 0; 216 } 217 } 218 219 /* Match only packets coming from the ingress port where this 220 * filter will be created. 221 */ 222 fs->val.iport = netdev2pinfo(dev)->port_id; 223 fs->mask.iport = ~0; 224 } 225 226 static int cxgb4_validate_flow_match(struct net_device *dev, 227 struct flow_cls_offload *cls) 228 { 229 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 230 struct flow_dissector *dissector = rule->match.dissector; 231 u16 ethtype_mask = 0; 232 u16 ethtype_key = 0; 233 234 if (dissector->used_keys & 235 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | 236 BIT(FLOW_DISSECTOR_KEY_BASIC) | 237 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | 238 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | 239 BIT(FLOW_DISSECTOR_KEY_PORTS) | 240 BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | 241 BIT(FLOW_DISSECTOR_KEY_VLAN) | 242 BIT(FLOW_DISSECTOR_KEY_IP))) { 243 netdev_warn(dev, "Unsupported key used: 0x%x\n", 244 dissector->used_keys); 245 return -EOPNOTSUPP; 246 } 247 248 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 249 struct flow_match_basic match; 250 251 flow_rule_match_basic(rule, &match); 252 ethtype_key = ntohs(match.key->n_proto); 253 ethtype_mask = ntohs(match.mask->n_proto); 254 } 255 256 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) { 257 u16 eth_ip_type = ethtype_key & ethtype_mask; 258 struct flow_match_ip match; 259 260 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) { 261 netdev_err(dev, "IP Key supported only with IPv4/v6"); 262 return -EINVAL; 263 } 264 265 flow_rule_match_ip(rule, &match); 266 if (match.mask->ttl) { 267 netdev_warn(dev, "ttl match unsupported for offload"); 268 return -EOPNOTSUPP; 269 } 270 } 271 272 return 0; 273 } 274 275 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask, 276 u8 field) 277 { 278 u32 set_val = val & ~mask; 279 u32 offset = 0; 280 u8 size = 1; 281 int i; 282 283 for (i = 0; i < ARRAY_SIZE(pedits); i++) { 284 if (pedits[i].field == field) { 285 offset = pedits[i].offset; 286 size = pedits[i].size; 287 break; 288 } 289 } 290 memcpy((u8 *)fs + offset, &set_val, size); 291 } 292 293 static void process_pedit_field(struct ch_filter_specification *fs, u32 val, 294 u32 mask, u32 offset, u8 htype) 295 { 296 switch (htype) { 297 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 298 switch (offset) { 299 case PEDIT_ETH_DMAC_31_0: 300 fs->newdmac = 1; 301 offload_pedit(fs, val, mask, ETH_DMAC_31_0); 302 break; 303 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 304 if (~mask & PEDIT_ETH_DMAC_MASK) 305 offload_pedit(fs, val, mask, ETH_DMAC_47_32); 306 else 307 offload_pedit(fs, val >> 16, mask >> 16, 308 ETH_SMAC_15_0); 309 break; 310 case PEDIT_ETH_SMAC_47_16: 311 fs->newsmac = 1; 312 offload_pedit(fs, val, mask, ETH_SMAC_47_16); 313 } 314 break; 315 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 316 switch (offset) { 317 case PEDIT_IP4_SRC: 318 offload_pedit(fs, val, mask, IP4_SRC); 319 break; 320 case PEDIT_IP4_DST: 321 offload_pedit(fs, val, mask, IP4_DST); 322 } 323 fs->nat_mode = NAT_MODE_ALL; 324 break; 325 case FLOW_ACT_MANGLE_HDR_TYPE_IP6: 326 switch (offset) { 327 case PEDIT_IP6_SRC_31_0: 328 offload_pedit(fs, val, mask, IP6_SRC_31_0); 329 break; 330 case PEDIT_IP6_SRC_63_32: 331 offload_pedit(fs, val, mask, IP6_SRC_63_32); 332 break; 333 case PEDIT_IP6_SRC_95_64: 334 offload_pedit(fs, val, mask, IP6_SRC_95_64); 335 break; 336 case PEDIT_IP6_SRC_127_96: 337 offload_pedit(fs, val, mask, IP6_SRC_127_96); 338 break; 339 case PEDIT_IP6_DST_31_0: 340 offload_pedit(fs, val, mask, IP6_DST_31_0); 341 break; 342 case PEDIT_IP6_DST_63_32: 343 offload_pedit(fs, val, mask, IP6_DST_63_32); 344 break; 345 case PEDIT_IP6_DST_95_64: 346 offload_pedit(fs, val, mask, IP6_DST_95_64); 347 break; 348 case PEDIT_IP6_DST_127_96: 349 offload_pedit(fs, val, mask, IP6_DST_127_96); 350 } 351 fs->nat_mode = NAT_MODE_ALL; 352 break; 353 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 354 switch (offset) { 355 case PEDIT_TCP_SPORT_DPORT: 356 if (~mask & PEDIT_TCP_UDP_SPORT_MASK) 357 offload_pedit(fs, cpu_to_be32(val) >> 16, 358 cpu_to_be32(mask) >> 16, 359 TCP_SPORT); 360 else 361 offload_pedit(fs, cpu_to_be32(val), 362 cpu_to_be32(mask), TCP_DPORT); 363 } 364 fs->nat_mode = NAT_MODE_ALL; 365 break; 366 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 367 switch (offset) { 368 case PEDIT_UDP_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 UDP_SPORT); 373 else 374 offload_pedit(fs, cpu_to_be32(val), 375 cpu_to_be32(mask), UDP_DPORT); 376 } 377 fs->nat_mode = NAT_MODE_ALL; 378 } 379 } 380 381 void cxgb4_process_flow_actions(struct net_device *in, 382 struct flow_action *actions, 383 struct ch_filter_specification *fs) 384 { 385 struct flow_action_entry *act; 386 int i; 387 388 flow_action_for_each(i, act, actions) { 389 switch (act->id) { 390 case FLOW_ACTION_ACCEPT: 391 fs->action = FILTER_PASS; 392 break; 393 case FLOW_ACTION_DROP: 394 fs->action = FILTER_DROP; 395 break; 396 case FLOW_ACTION_REDIRECT: { 397 struct net_device *out = act->dev; 398 struct port_info *pi = netdev_priv(out); 399 400 fs->action = FILTER_SWITCH; 401 fs->eport = pi->port_id; 402 } 403 break; 404 case FLOW_ACTION_VLAN_POP: 405 case FLOW_ACTION_VLAN_PUSH: 406 case FLOW_ACTION_VLAN_MANGLE: { 407 u8 prio = act->vlan.prio; 408 u16 vid = act->vlan.vid; 409 u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid; 410 switch (act->id) { 411 case FLOW_ACTION_VLAN_POP: 412 fs->newvlan |= VLAN_REMOVE; 413 break; 414 case FLOW_ACTION_VLAN_PUSH: 415 fs->newvlan |= VLAN_INSERT; 416 fs->vlan = vlan_tci; 417 break; 418 case FLOW_ACTION_VLAN_MANGLE: 419 fs->newvlan |= VLAN_REWRITE; 420 fs->vlan = vlan_tci; 421 break; 422 default: 423 break; 424 } 425 } 426 break; 427 case FLOW_ACTION_MANGLE: { 428 u32 mask, val, offset; 429 u8 htype; 430 431 htype = act->mangle.htype; 432 mask = act->mangle.mask; 433 val = act->mangle.val; 434 offset = act->mangle.offset; 435 436 process_pedit_field(fs, val, mask, offset, htype); 437 } 438 break; 439 default: 440 break; 441 } 442 } 443 } 444 445 static bool valid_l4_mask(u32 mask) 446 { 447 u16 hi, lo; 448 449 /* Either the upper 16-bits (SPORT) OR the lower 450 * 16-bits (DPORT) can be set, but NOT BOTH. 451 */ 452 hi = (mask >> 16) & 0xFFFF; 453 lo = mask & 0xFFFF; 454 455 return hi && lo ? false : true; 456 } 457 458 static bool valid_pedit_action(struct net_device *dev, 459 const struct flow_action_entry *act) 460 { 461 u32 mask, offset; 462 u8 htype; 463 464 htype = act->mangle.htype; 465 mask = act->mangle.mask; 466 offset = act->mangle.offset; 467 468 switch (htype) { 469 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 470 switch (offset) { 471 case PEDIT_ETH_DMAC_31_0: 472 case PEDIT_ETH_DMAC_47_32_SMAC_15_0: 473 case PEDIT_ETH_SMAC_47_16: 474 break; 475 default: 476 netdev_err(dev, "%s: Unsupported pedit field\n", 477 __func__); 478 return false; 479 } 480 break; 481 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 482 switch (offset) { 483 case PEDIT_IP4_SRC: 484 case PEDIT_IP4_DST: 485 break; 486 default: 487 netdev_err(dev, "%s: Unsupported pedit field\n", 488 __func__); 489 return false; 490 } 491 break; 492 case FLOW_ACT_MANGLE_HDR_TYPE_IP6: 493 switch (offset) { 494 case PEDIT_IP6_SRC_31_0: 495 case PEDIT_IP6_SRC_63_32: 496 case PEDIT_IP6_SRC_95_64: 497 case PEDIT_IP6_SRC_127_96: 498 case PEDIT_IP6_DST_31_0: 499 case PEDIT_IP6_DST_63_32: 500 case PEDIT_IP6_DST_95_64: 501 case PEDIT_IP6_DST_127_96: 502 break; 503 default: 504 netdev_err(dev, "%s: Unsupported pedit field\n", 505 __func__); 506 return false; 507 } 508 break; 509 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 510 switch (offset) { 511 case PEDIT_TCP_SPORT_DPORT: 512 if (!valid_l4_mask(~mask)) { 513 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n", 514 __func__); 515 return false; 516 } 517 break; 518 default: 519 netdev_err(dev, "%s: Unsupported pedit field\n", 520 __func__); 521 return false; 522 } 523 break; 524 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 525 switch (offset) { 526 case PEDIT_UDP_SPORT_DPORT: 527 if (!valid_l4_mask(~mask)) { 528 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n", 529 __func__); 530 return false; 531 } 532 break; 533 default: 534 netdev_err(dev, "%s: Unsupported pedit field\n", 535 __func__); 536 return false; 537 } 538 break; 539 default: 540 netdev_err(dev, "%s: Unsupported pedit type\n", __func__); 541 return false; 542 } 543 return true; 544 } 545 546 int cxgb4_validate_flow_actions(struct net_device *dev, 547 struct flow_action *actions) 548 { 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, actions) { 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 flow_cls_offload *cls) 636 { 637 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 638 struct netlink_ext_ack *extack = cls->common.extack; 639 struct adapter *adap = netdev2adap(dev); 640 struct ch_tc_flower_entry *ch_flower; 641 struct ch_filter_specification *fs; 642 struct filter_ctx ctx; 643 int fidx, ret; 644 645 if (cxgb4_validate_flow_actions(dev, &rule->action)) 646 return -EOPNOTSUPP; 647 648 if (cxgb4_validate_flow_match(dev, cls)) 649 return -EOPNOTSUPP; 650 651 ch_flower = allocate_flower_entry(); 652 if (!ch_flower) { 653 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__); 654 return -ENOMEM; 655 } 656 657 fs = &ch_flower->fs; 658 fs->hitcnts = 1; 659 cxgb4_process_flow_match(dev, cls, fs); 660 cxgb4_process_flow_actions(dev, &rule->action, fs); 661 662 fs->hash = is_filter_exact_match(adap, fs); 663 if (fs->hash) { 664 fidx = 0; 665 } else { 666 u8 inet_family; 667 668 inet_family = fs->type ? PF_INET6 : PF_INET; 669 670 /* Note that TC uses prio 0 to indicate stack to 671 * generate automatic prio and hence doesn't pass prio 672 * 0 to driver. However, the hardware TCAM index 673 * starts from 0. Hence, the -1 here. 674 */ 675 if (cls->common.prio <= (adap->tids.nftids + 676 adap->tids.nhpftids)) { 677 fidx = cls->common.prio - 1; 678 if (fidx < adap->tids.nhpftids) 679 fs->prio = 1; 680 } else { 681 fidx = cxgb4_get_free_ftid(dev, inet_family); 682 } 683 684 /* Only insert FLOWER rule if its priority doesn't 685 * conflict with existing rules in the LETCAM. 686 */ 687 if (fidx < 0 || 688 !cxgb4_filter_prio_in_range(dev, fidx, cls->common.prio)) { 689 NL_SET_ERR_MSG_MOD(extack, 690 "No free LETCAM index available"); 691 ret = -ENOMEM; 692 goto free_entry; 693 } 694 } 695 696 fs->tc_prio = cls->common.prio; 697 fs->tc_cookie = cls->cookie; 698 699 init_completion(&ctx.completion); 700 ret = __cxgb4_set_filter(dev, fidx, fs, &ctx); 701 if (ret) { 702 netdev_err(dev, "%s: filter creation err %d\n", 703 __func__, ret); 704 goto free_entry; 705 } 706 707 /* Wait for reply */ 708 ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); 709 if (!ret) { 710 ret = -ETIMEDOUT; 711 goto free_entry; 712 } 713 714 ret = ctx.result; 715 /* Check if hw returned error for filter creation */ 716 if (ret) 717 goto free_entry; 718 719 ch_flower->tc_flower_cookie = cls->cookie; 720 ch_flower->filter_id = ctx.tid; 721 ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node, 722 adap->flower_ht_params); 723 if (ret) 724 goto del_filter; 725 726 return 0; 727 728 del_filter: 729 cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 730 731 free_entry: 732 kfree(ch_flower); 733 return ret; 734 } 735 736 int cxgb4_tc_flower_destroy(struct net_device *dev, 737 struct flow_cls_offload *cls) 738 { 739 struct adapter *adap = netdev2adap(dev); 740 struct ch_tc_flower_entry *ch_flower; 741 int ret; 742 743 ch_flower = ch_flower_lookup(adap, cls->cookie); 744 if (!ch_flower) 745 return -ENOENT; 746 747 ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); 748 if (ret) 749 goto err; 750 751 ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node, 752 adap->flower_ht_params); 753 if (ret) { 754 netdev_err(dev, "Flow remove from rhashtable failed"); 755 goto err; 756 } 757 kfree_rcu(ch_flower, rcu); 758 759 err: 760 return ret; 761 } 762 763 static void ch_flower_stats_handler(struct work_struct *work) 764 { 765 struct adapter *adap = container_of(work, struct adapter, 766 flower_stats_work); 767 struct ch_tc_flower_entry *flower_entry; 768 struct ch_tc_flower_stats *ofld_stats; 769 struct rhashtable_iter iter; 770 u64 packets; 771 u64 bytes; 772 int ret; 773 774 rhashtable_walk_enter(&adap->flower_tbl, &iter); 775 do { 776 rhashtable_walk_start(&iter); 777 778 while ((flower_entry = rhashtable_walk_next(&iter)) && 779 !IS_ERR(flower_entry)) { 780 ret = cxgb4_get_filter_counters(adap->port[0], 781 flower_entry->filter_id, 782 &packets, &bytes, 783 flower_entry->fs.hash); 784 if (!ret) { 785 spin_lock(&flower_entry->lock); 786 ofld_stats = &flower_entry->stats; 787 788 if (ofld_stats->prev_packet_count != packets) { 789 ofld_stats->prev_packet_count = packets; 790 ofld_stats->last_used = jiffies; 791 } 792 spin_unlock(&flower_entry->lock); 793 } 794 } 795 796 rhashtable_walk_stop(&iter); 797 798 } while (flower_entry == ERR_PTR(-EAGAIN)); 799 rhashtable_walk_exit(&iter); 800 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 801 } 802 803 static void ch_flower_stats_cb(struct timer_list *t) 804 { 805 struct adapter *adap = from_timer(adap, t, flower_stats_timer); 806 807 schedule_work(&adap->flower_stats_work); 808 } 809 810 int cxgb4_tc_flower_stats(struct net_device *dev, 811 struct flow_cls_offload *cls) 812 { 813 struct adapter *adap = netdev2adap(dev); 814 struct ch_tc_flower_stats *ofld_stats; 815 struct ch_tc_flower_entry *ch_flower; 816 u64 packets; 817 u64 bytes; 818 int ret; 819 820 ch_flower = ch_flower_lookup(adap, cls->cookie); 821 if (!ch_flower) { 822 ret = -ENOENT; 823 goto err; 824 } 825 826 ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id, 827 &packets, &bytes, 828 ch_flower->fs.hash); 829 if (ret < 0) 830 goto err; 831 832 spin_lock_bh(&ch_flower->lock); 833 ofld_stats = &ch_flower->stats; 834 if (ofld_stats->packet_count != packets) { 835 if (ofld_stats->prev_packet_count != packets) 836 ofld_stats->last_used = jiffies; 837 flow_stats_update(&cls->stats, bytes - ofld_stats->byte_count, 838 packets - ofld_stats->packet_count, 839 ofld_stats->last_used); 840 841 ofld_stats->packet_count = packets; 842 ofld_stats->byte_count = bytes; 843 ofld_stats->prev_packet_count = packets; 844 } 845 spin_unlock_bh(&ch_flower->lock); 846 return 0; 847 848 err: 849 return ret; 850 } 851 852 static const struct rhashtable_params cxgb4_tc_flower_ht_params = { 853 .nelem_hint = 384, 854 .head_offset = offsetof(struct ch_tc_flower_entry, node), 855 .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie), 856 .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie), 857 .max_size = 524288, 858 .min_size = 512, 859 .automatic_shrinking = true 860 }; 861 862 int cxgb4_init_tc_flower(struct adapter *adap) 863 { 864 int ret; 865 866 if (adap->tc_flower_initialized) 867 return -EEXIST; 868 869 adap->flower_ht_params = cxgb4_tc_flower_ht_params; 870 ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params); 871 if (ret) 872 return ret; 873 874 INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler); 875 timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0); 876 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); 877 adap->tc_flower_initialized = true; 878 return 0; 879 } 880 881 void cxgb4_cleanup_tc_flower(struct adapter *adap) 882 { 883 if (!adap->tc_flower_initialized) 884 return; 885 886 if (adap->flower_stats_timer.function) 887 del_timer_sync(&adap->flower_stats_timer); 888 cancel_work_sync(&adap->flower_stats_work); 889 rhashtable_destroy(&adap->flower_tbl); 890 adap->tc_flower_initialized = false; 891 } 892