drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c

   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 flow_cls_offload *cls,
  84                                      struct ch_filter_specification *fs)
  85 {
  86         struct flow_rule *rule = flow_cls_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                 fs->val.ivlan_vld = 1;
 201                 fs->mask.ivlan_vld = 1;
 202
 203                 /* Chelsio adapters use ivlan_vld bit to match vlan packets
 204                  * as 802.1Q. Also, when vlan tag is present in packets,
 205                  * ethtype match is used then to match on ethtype of inner
 206                  * header ie. the header following the vlan header.
 207                  * So, set the ivlan_vld based on ethtype info supplied by
 208                  * TC for vlan packets if its 802.1Q. And then reset the
 209                  * ethtype value else, hw will try to match the supplied
 210                  * ethtype value with ethtype of inner header.
 211                  */
 212                 if (fs->val.ethtype == ETH_P_8021Q) {
 213                         fs->val.ethtype = 0;
 214                         fs->mask.ethtype = 0;
 215                 }
 216         }
 217
 218         /* Match only packets coming from the ingress port where this
 219          * filter will be created.
 220          */
 221         fs->val.iport = netdev2pinfo(dev)->port_id;
 222         fs->mask.iport = ~0;
 223 }
 224
 225 static int cxgb4_validate_flow_match(struct net_device *dev,
 226                                      struct flow_cls_offload *cls)
 227 {
 228         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 229         struct flow_dissector *dissector = rule->match.dissector;
 230         u16 ethtype_mask = 0;
 231         u16 ethtype_key = 0;
 232
 233         if (dissector->used_keys &
 234             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
 235               BIT(FLOW_DISSECTOR_KEY_BASIC) |
 236               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
 237               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
 238               BIT(FLOW_DISSECTOR_KEY_PORTS) |
 239               BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
 240               BIT(FLOW_DISSECTOR_KEY_VLAN) |
 241               BIT(FLOW_DISSECTOR_KEY_IP))) {
 242                 netdev_warn(dev, "Unsupported key used: 0x%x\n",
 243                             dissector->used_keys);
 244                 return -EOPNOTSUPP;
 245         }
 246
 247         if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
 248                 struct flow_match_basic match;
 249
 250                 flow_rule_match_basic(rule, &match);
 251                 ethtype_key = ntohs(match.key->n_proto);
 252                 ethtype_mask = ntohs(match.mask->n_proto);
 253         }
 254
 255         if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
 256                 u16 eth_ip_type = ethtype_key & ethtype_mask;
 257                 struct flow_match_ip match;
 258
 259                 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) {
 260                         netdev_err(dev, "IP Key supported only with IPv4/v6");
 261                         return -EINVAL;
 262                 }
 263
 264                 flow_rule_match_ip(rule, &match);
 265                 if (match.mask->ttl) {
 266                         netdev_warn(dev, "ttl match unsupported for offload");
 267                         return -EOPNOTSUPP;
 268                 }
 269         }
 270
 271         return 0;
 272 }
 273
 274 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask,
 275                           u8 field)
 276 {
 277         u32 set_val = val & ~mask;
 278         u32 offset = 0;
 279         u8 size = 1;
 280         int i;
 281
 282         for (i = 0; i < ARRAY_SIZE(pedits); i++) {
 283                 if (pedits[i].field == field) {
 284                         offset = pedits[i].offset;
 285                         size = pedits[i].size;
 286                         break;
 287                 }
 288         }
 289         memcpy((u8 *)fs + offset, &set_val, size);
 290 }
 291
 292 static void process_pedit_field(struct ch_filter_specification *fs, u32 val,
 293                                 u32 mask, u32 offset, u8 htype)
 294 {
 295         switch (htype) {
 296         case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
 297                 switch (offset) {
 298                 case PEDIT_ETH_DMAC_31_0:
 299                         fs->newdmac = 1;
 300                         offload_pedit(fs, val, mask, ETH_DMAC_31_0);
 301                         break;
 302                 case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
 303                         if (~mask & PEDIT_ETH_DMAC_MASK)
 304                                 offload_pedit(fs, val, mask, ETH_DMAC_47_32);
 305                         else
 306                                 offload_pedit(fs, val >> 16, mask >> 16,
 307                                               ETH_SMAC_15_0);
 308                         break;
 309                 case PEDIT_ETH_SMAC_47_16:
 310                         fs->newsmac = 1;
 311                         offload_pedit(fs, val, mask, ETH_SMAC_47_16);
 312                 }
 313                 break;
 314         case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
 315                 switch (offset) {
 316                 case PEDIT_IP4_SRC:
 317                         offload_pedit(fs, val, mask, IP4_SRC);
 318                         break;
 319                 case PEDIT_IP4_DST:
 320                         offload_pedit(fs, val, mask, IP4_DST);
 321                 }
 322                 fs->nat_mode = NAT_MODE_ALL;
 323                 break;
 324         case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
 325                 switch (offset) {
 326                 case PEDIT_IP6_SRC_31_0:
 327                         offload_pedit(fs, val, mask, IP6_SRC_31_0);
 328                         break;
 329                 case PEDIT_IP6_SRC_63_32:
 330                         offload_pedit(fs, val, mask, IP6_SRC_63_32);
 331                         break;
 332                 case PEDIT_IP6_SRC_95_64:
 333                         offload_pedit(fs, val, mask, IP6_SRC_95_64);
 334                         break;
 335                 case PEDIT_IP6_SRC_127_96:
 336                         offload_pedit(fs, val, mask, IP6_SRC_127_96);
 337                         break;
 338                 case PEDIT_IP6_DST_31_0:
 339                         offload_pedit(fs, val, mask, IP6_DST_31_0);
 340                         break;
 341                 case PEDIT_IP6_DST_63_32:
 342                         offload_pedit(fs, val, mask, IP6_DST_63_32);
 343                         break;
 344                 case PEDIT_IP6_DST_95_64:
 345                         offload_pedit(fs, val, mask, IP6_DST_95_64);
 346                         break;
 347                 case PEDIT_IP6_DST_127_96:
 348                         offload_pedit(fs, val, mask, IP6_DST_127_96);
 349                 }
 350                 fs->nat_mode = NAT_MODE_ALL;
 351                 break;
 352         case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
 353                 switch (offset) {
 354                 case PEDIT_TCP_SPORT_DPORT:
 355                         if (~mask & PEDIT_TCP_UDP_SPORT_MASK)
 356                                 offload_pedit(fs, cpu_to_be32(val) >> 16,
 357                                               cpu_to_be32(mask) >> 16,
 358                                               TCP_SPORT);
 359                         else
 360                                 offload_pedit(fs, cpu_to_be32(val),
 361                                               cpu_to_be32(mask), TCP_DPORT);
 362                 }
 363                 fs->nat_mode = NAT_MODE_ALL;
 364                 break;
 365         case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
 366                 switch (offset) {
 367                 case PEDIT_UDP_SPORT_DPORT:
 368                         if (~mask & PEDIT_TCP_UDP_SPORT_MASK)
 369                                 offload_pedit(fs, cpu_to_be32(val) >> 16,
 370                                               cpu_to_be32(mask) >> 16,
 371                                               UDP_SPORT);
 372                         else
 373                                 offload_pedit(fs, cpu_to_be32(val),
 374                                               cpu_to_be32(mask), UDP_DPORT);
 375                 }
 376                 fs->nat_mode = NAT_MODE_ALL;
 377         }
 378 }
 379
 380 static void cxgb4_process_flow_actions(struct net_device *in,
 381                                        struct flow_cls_offload *cls,
 382                                        struct ch_filter_specification *fs)
 383 {
 384         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 385         struct flow_action_entry *act;
 386         int i;
 387
 388         flow_action_for_each(i, act, &rule->action) {
 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 static int cxgb4_validate_flow_actions(struct net_device *dev,
 547                                        struct flow_cls_offload *cls)
 548 {
 549         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 550         struct flow_action_entry *act;
 551         bool act_redir = false;
 552         bool act_pedit = false;
 553         bool act_vlan = false;
 554         int i;
 555
 556         flow_action_for_each(i, act, &rule->action) {
 557                 switch (act->id) {
 558                 case FLOW_ACTION_ACCEPT:
 559                 case FLOW_ACTION_DROP:
 560                         /* Do nothing */
 561                         break;
 562                 case FLOW_ACTION_REDIRECT: {
 563                         struct adapter *adap = netdev2adap(dev);
 564                         struct net_device *n_dev, *target_dev;
 565                         unsigned int i;
 566                         bool found = false;
 567
 568                         target_dev = act->dev;
 569                         for_each_port(adap, i) {
 570                                 n_dev = adap->port[i];
 571                                 if (target_dev == n_dev) {
 572                                         found = true;
 573                                         break;
 574                                 }
 575                         }
 576
 577                         /* If interface doesn't belong to our hw, then
 578                          * the provided output port is not valid
 579                          */
 580                         if (!found) {
 581                                 netdev_err(dev, "%s: Out port invalid\n",
 582                                            __func__);
 583                                 return -EINVAL;
 584                         }
 585                         act_redir = true;
 586                         }
 587                         break;
 588                 case FLOW_ACTION_VLAN_POP:
 589                 case FLOW_ACTION_VLAN_PUSH:
 590                 case FLOW_ACTION_VLAN_MANGLE: {
 591                         u16 proto = be16_to_cpu(act->vlan.proto);
 592
 593                         switch (act->id) {
 594                         case FLOW_ACTION_VLAN_POP:
 595                                 break;
 596                         case FLOW_ACTION_VLAN_PUSH:
 597                         case FLOW_ACTION_VLAN_MANGLE:
 598                                 if (proto != ETH_P_8021Q) {
 599                                         netdev_err(dev, "%s: Unsupported vlan proto\n",
 600                                                    __func__);
 601                                         return -EOPNOTSUPP;
 602                                 }
 603                                 break;
 604                         default:
 605                                 netdev_err(dev, "%s: Unsupported vlan action\n",
 606                                            __func__);
 607                                 return -EOPNOTSUPP;
 608                         }
 609                         act_vlan = true;
 610                         }
 611                         break;
 612                 case FLOW_ACTION_MANGLE: {
 613                         bool pedit_valid = valid_pedit_action(dev, act);
 614
 615                         if (!pedit_valid)
 616                                 return -EOPNOTSUPP;
 617                         act_pedit = true;
 618                         }
 619                         break;
 620                 default:
 621                         netdev_err(dev, "%s: Unsupported action\n", __func__);
 622                         return -EOPNOTSUPP;
 623                 }
 624         }
 625
 626         if ((act_pedit || act_vlan) && !act_redir) {
 627                 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n",
 628                            __func__);
 629                 return -EINVAL;
 630         }
 631
 632         return 0;
 633 }
 634
 635 int cxgb4_tc_flower_replace(struct net_device *dev,
 636                             struct flow_cls_offload *cls)
 637 {
 638         struct adapter *adap = netdev2adap(dev);
 639         struct ch_tc_flower_entry *ch_flower;
 640         struct ch_filter_specification *fs;
 641         struct filter_ctx ctx;
 642         int fidx;
 643         int ret;
 644
 645         if (cxgb4_validate_flow_actions(dev, cls))
 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, cls, fs);
 661
 662         fs->hash = is_filter_exact_match(adap, fs);
 663         if (fs->hash) {
 664                 fidx = 0;
 665         } else {
 666                 fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET);
 667                 if (fidx < 0) {
 668                         netdev_err(dev, "%s: No fidx for offload.\n", __func__);
 669                         ret = -ENOMEM;
 670                         goto free_entry;
 671                 }
 672         }
 673
 674         init_completion(&ctx.completion);
 675         ret = __cxgb4_set_filter(dev, fidx, fs, &ctx);
 676         if (ret) {
 677                 netdev_err(dev, "%s: filter creation err %d\n",
 678                            __func__, ret);
 679                 goto free_entry;
 680         }
 681
 682         /* Wait for reply */
 683         ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ);
 684         if (!ret) {
 685                 ret = -ETIMEDOUT;
 686                 goto free_entry;
 687         }
 688
 689         ret = ctx.result;
 690         /* Check if hw returned error for filter creation */
 691         if (ret)
 692                 goto free_entry;
 693
 694         ch_flower->tc_flower_cookie = cls->cookie;
 695         ch_flower->filter_id = ctx.tid;
 696         ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node,
 697                                      adap->flower_ht_params);
 698         if (ret)
 699                 goto del_filter;
 700
 701         return 0;
 702
 703 del_filter:
 704         cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
 705
 706 free_entry:
 707         kfree(ch_flower);
 708         return ret;
 709 }
 710
 711 int cxgb4_tc_flower_destroy(struct net_device *dev,
 712                             struct flow_cls_offload *cls)
 713 {
 714         struct adapter *adap = netdev2adap(dev);
 715         struct ch_tc_flower_entry *ch_flower;
 716         int ret;
 717
 718         ch_flower = ch_flower_lookup(adap, cls->cookie);
 719         if (!ch_flower)
 720                 return -ENOENT;
 721
 722         ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
 723         if (ret)
 724                 goto err;
 725
 726         ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node,
 727                                      adap->flower_ht_params);
 728         if (ret) {
 729                 netdev_err(dev, "Flow remove from rhashtable failed");
 730                 goto err;
 731         }
 732         kfree_rcu(ch_flower, rcu);
 733
 734 err:
 735         return ret;
 736 }
 737
 738 static void ch_flower_stats_handler(struct work_struct *work)
 739 {
 740         struct adapter *adap = container_of(work, struct adapter,
 741                                             flower_stats_work);
 742         struct ch_tc_flower_entry *flower_entry;
 743         struct ch_tc_flower_stats *ofld_stats;
 744         struct rhashtable_iter iter;
 745         u64 packets;
 746         u64 bytes;
 747         int ret;
 748
 749         rhashtable_walk_enter(&adap->flower_tbl, &iter);
 750         do {
 751                 rhashtable_walk_start(&iter);
 752
 753                 while ((flower_entry = rhashtable_walk_next(&iter)) &&
 754                        !IS_ERR(flower_entry)) {
 755                         ret = cxgb4_get_filter_counters(adap->port[0],
 756                                                         flower_entry->filter_id,
 757                                                         &packets, &bytes,
 758                                                         flower_entry->fs.hash);
 759                         if (!ret) {
 760                                 spin_lock(&flower_entry->lock);
 761                                 ofld_stats = &flower_entry->stats;
 762
 763                                 if (ofld_stats->prev_packet_count != packets) {
 764                                         ofld_stats->prev_packet_count = packets;
 765                                         ofld_stats->last_used = jiffies;
 766                                 }
 767                                 spin_unlock(&flower_entry->lock);
 768                         }
 769                 }
 770
 771                 rhashtable_walk_stop(&iter);
 772
 773         } while (flower_entry == ERR_PTR(-EAGAIN));
 774         rhashtable_walk_exit(&iter);
 775         mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
 776 }
 777
 778 static void ch_flower_stats_cb(struct timer_list *t)
 779 {
 780         struct adapter *adap = from_timer(adap, t, flower_stats_timer);
 781
 782         schedule_work(&adap->flower_stats_work);
 783 }
 784
 785 int cxgb4_tc_flower_stats(struct net_device *dev,
 786                           struct flow_cls_offload *cls)
 787 {
 788         struct adapter *adap = netdev2adap(dev);
 789         struct ch_tc_flower_stats *ofld_stats;
 790         struct ch_tc_flower_entry *ch_flower;
 791         u64 packets;
 792         u64 bytes;
 793         int ret;
 794
 795         ch_flower = ch_flower_lookup(adap, cls->cookie);
 796         if (!ch_flower) {
 797                 ret = -ENOENT;
 798                 goto err;
 799         }
 800
 801         ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id,
 802                                         &packets, &bytes,
 803                                         ch_flower->fs.hash);
 804         if (ret < 0)
 805                 goto err;
 806
 807         spin_lock_bh(&ch_flower->lock);
 808         ofld_stats = &ch_flower->stats;
 809         if (ofld_stats->packet_count != packets) {
 810                 if (ofld_stats->prev_packet_count != packets)
 811                         ofld_stats->last_used = jiffies;
 812                 flow_stats_update(&cls->stats, bytes - ofld_stats->byte_count,
 813                                   packets - ofld_stats->packet_count,
 814                                   ofld_stats->last_used);
 815
 816                 ofld_stats->packet_count = packets;
 817                 ofld_stats->byte_count = bytes;
 818                 ofld_stats->prev_packet_count = packets;
 819         }
 820         spin_unlock_bh(&ch_flower->lock);
 821         return 0;
 822
 823 err:
 824         return ret;
 825 }
 826
 827 static const struct rhashtable_params cxgb4_tc_flower_ht_params = {
 828         .nelem_hint = 384,
 829         .head_offset = offsetof(struct ch_tc_flower_entry, node),
 830         .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie),
 831         .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie),
 832         .max_size = 524288,
 833         .min_size = 512,
 834         .automatic_shrinking = true
 835 };
 836
 837 int cxgb4_init_tc_flower(struct adapter *adap)
 838 {
 839         int ret;
 840
 841         if (adap->tc_flower_initialized)
 842                 return -EEXIST;
 843
 844         adap->flower_ht_params = cxgb4_tc_flower_ht_params;
 845         ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params);
 846         if (ret)
 847                 return ret;
 848
 849         INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler);
 850         timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0);
 851         mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
 852         adap->tc_flower_initialized = true;
 853         return 0;
 854 }
 855
 856 void cxgb4_cleanup_tc_flower(struct adapter *adap)
 857 {
 858         if (!adap->tc_flower_initialized)
 859                 return;
 860
 861         if (adap->flower_stats_timer.function)
 862                 del_timer_sync(&adap->flower_stats_timer);
 863         cancel_work_sync(&adap->flower_stats_work);
 864         rhashtable_destroy(&adap->flower_tbl);
 865         adap->tc_flower_initialized = false;
 866 }