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         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 static void cxgb4_process_flow_actions(struct net_device *in,
 382                                        struct flow_cls_offload *cls,
 383                                        struct ch_filter_specification *fs)
 384 {
 385         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 386         struct flow_action_entry *act;
 387         int i;
 388
 389         flow_action_for_each(i, act, &rule->action) {
 390                 switch (act->id) {
 391                 case FLOW_ACTION_ACCEPT:
 392                         fs->action = FILTER_PASS;
 393                         break;
 394                 case FLOW_ACTION_DROP:
 395                         fs->action = FILTER_DROP;
 396                         break;
 397                 case FLOW_ACTION_REDIRECT: {
 398                         struct net_device *out = act->dev;
 399                         struct port_info *pi = netdev_priv(out);
 400
 401                         fs->action = FILTER_SWITCH;
 402                         fs->eport = pi->port_id;
 403                         }
 404                         break;
 405                 case FLOW_ACTION_VLAN_POP:
 406                 case FLOW_ACTION_VLAN_PUSH:
 407                 case FLOW_ACTION_VLAN_MANGLE: {
 408                         u8 prio = act->vlan.prio;
 409                         u16 vid = act->vlan.vid;
 410                         u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid;
 411                         switch (act->id) {
 412                         case FLOW_ACTION_VLAN_POP:
 413                                 fs->newvlan |= VLAN_REMOVE;
 414                                 break;
 415                         case FLOW_ACTION_VLAN_PUSH:
 416                                 fs->newvlan |= VLAN_INSERT;
 417                                 fs->vlan = vlan_tci;
 418                                 break;
 419                         case FLOW_ACTION_VLAN_MANGLE:
 420                                 fs->newvlan |= VLAN_REWRITE;
 421                                 fs->vlan = vlan_tci;
 422                                 break;
 423                         default:
 424                                 break;
 425                         }
 426                         }
 427                         break;
 428                 case FLOW_ACTION_MANGLE: {
 429                         u32 mask, val, offset;
 430                         u8 htype;
 431
 432                         htype = act->mangle.htype;
 433                         mask = act->mangle.mask;
 434                         val = act->mangle.val;
 435                         offset = act->mangle.offset;
 436
 437                         process_pedit_field(fs, val, mask, offset, htype);
 438                         }
 439                         break;
 440                 default:
 441                         break;
 442                 }
 443         }
 444 }
 445
 446 static bool valid_l4_mask(u32 mask)
 447 {
 448         u16 hi, lo;
 449
 450         /* Either the upper 16-bits (SPORT) OR the lower
 451          * 16-bits (DPORT) can be set, but NOT BOTH.
 452          */
 453         hi = (mask >> 16) & 0xFFFF;
 454         lo = mask & 0xFFFF;
 455
 456         return hi && lo ? false : true;
 457 }
 458
 459 static bool valid_pedit_action(struct net_device *dev,
 460                                const struct flow_action_entry *act)
 461 {
 462         u32 mask, offset;
 463         u8 htype;
 464
 465         htype = act->mangle.htype;
 466         mask = act->mangle.mask;
 467         offset = act->mangle.offset;
 468
 469         switch (htype) {
 470         case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
 471                 switch (offset) {
 472                 case PEDIT_ETH_DMAC_31_0:
 473                 case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
 474                 case PEDIT_ETH_SMAC_47_16:
 475                         break;
 476                 default:
 477                         netdev_err(dev, "%s: Unsupported pedit field\n",
 478                                    __func__);
 479                         return false;
 480                 }
 481                 break;
 482         case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
 483                 switch (offset) {
 484                 case PEDIT_IP4_SRC:
 485                 case PEDIT_IP4_DST:
 486                         break;
 487                 default:
 488                         netdev_err(dev, "%s: Unsupported pedit field\n",
 489                                    __func__);
 490                         return false;
 491                 }
 492                 break;
 493         case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
 494                 switch (offset) {
 495                 case PEDIT_IP6_SRC_31_0:
 496                 case PEDIT_IP6_SRC_63_32:
 497                 case PEDIT_IP6_SRC_95_64:
 498                 case PEDIT_IP6_SRC_127_96:
 499                 case PEDIT_IP6_DST_31_0:
 500                 case PEDIT_IP6_DST_63_32:
 501                 case PEDIT_IP6_DST_95_64:
 502                 case PEDIT_IP6_DST_127_96:
 503                         break;
 504                 default:
 505                         netdev_err(dev, "%s: Unsupported pedit field\n",
 506                                    __func__);
 507                         return false;
 508                 }
 509                 break;
 510         case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
 511                 switch (offset) {
 512                 case PEDIT_TCP_SPORT_DPORT:
 513                         if (!valid_l4_mask(~mask)) {
 514                                 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n",
 515                                            __func__);
 516                                 return false;
 517                         }
 518                         break;
 519                 default:
 520                         netdev_err(dev, "%s: Unsupported pedit field\n",
 521                                    __func__);
 522                         return false;
 523                 }
 524                 break;
 525         case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
 526                 switch (offset) {
 527                 case PEDIT_UDP_SPORT_DPORT:
 528                         if (!valid_l4_mask(~mask)) {
 529                                 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n",
 530                                            __func__);
 531                                 return false;
 532                         }
 533                         break;
 534                 default:
 535                         netdev_err(dev, "%s: Unsupported pedit field\n",
 536                                    __func__);
 537                         return false;
 538                 }
 539                 break;
 540         default:
 541                 netdev_err(dev, "%s: Unsupported pedit type\n", __func__);
 542                 return false;
 543         }
 544         return true;
 545 }
 546
 547 static int cxgb4_validate_flow_actions(struct net_device *dev,
 548                                        struct flow_cls_offload *cls)
 549 {
 550         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 551         struct flow_action_entry *act;
 552         bool act_redir = false;
 553         bool act_pedit = false;
 554         bool act_vlan = false;
 555         int i;
 556
 557         flow_action_for_each(i, act, &rule->action) {
 558                 switch (act->id) {
 559                 case FLOW_ACTION_ACCEPT:
 560                 case FLOW_ACTION_DROP:
 561                         /* Do nothing */
 562                         break;
 563                 case FLOW_ACTION_REDIRECT: {
 564                         struct adapter *adap = netdev2adap(dev);
 565                         struct net_device *n_dev, *target_dev;
 566                         unsigned int i;
 567                         bool found = false;
 568
 569                         target_dev = act->dev;
 570                         for_each_port(adap, i) {
 571                                 n_dev = adap->port[i];
 572                                 if (target_dev == n_dev) {
 573                                         found = true;
 574                                         break;
 575                                 }
 576                         }
 577
 578                         /* If interface doesn't belong to our hw, then
 579                          * the provided output port is not valid
 580                          */
 581                         if (!found) {
 582                                 netdev_err(dev, "%s: Out port invalid\n",
 583                                            __func__);
 584                                 return -EINVAL;
 585                         }
 586                         act_redir = true;
 587                         }
 588                         break;
 589                 case FLOW_ACTION_VLAN_POP:
 590                 case FLOW_ACTION_VLAN_PUSH:
 591                 case FLOW_ACTION_VLAN_MANGLE: {
 592                         u16 proto = be16_to_cpu(act->vlan.proto);
 593
 594                         switch (act->id) {
 595                         case FLOW_ACTION_VLAN_POP:
 596                                 break;
 597                         case FLOW_ACTION_VLAN_PUSH:
 598                         case FLOW_ACTION_VLAN_MANGLE:
 599                                 if (proto != ETH_P_8021Q) {
 600                                         netdev_err(dev, "%s: Unsupported vlan proto\n",
 601                                                    __func__);
 602                                         return -EOPNOTSUPP;
 603                                 }
 604                                 break;
 605                         default:
 606                                 netdev_err(dev, "%s: Unsupported vlan action\n",
 607                                            __func__);
 608                                 return -EOPNOTSUPP;
 609                         }
 610                         act_vlan = true;
 611                         }
 612                         break;
 613                 case FLOW_ACTION_MANGLE: {
 614                         bool pedit_valid = valid_pedit_action(dev, act);
 615
 616                         if (!pedit_valid)
 617                                 return -EOPNOTSUPP;
 618                         act_pedit = true;
 619                         }
 620                         break;
 621                 default:
 622                         netdev_err(dev, "%s: Unsupported action\n", __func__);
 623                         return -EOPNOTSUPP;
 624                 }
 625         }
 626
 627         if ((act_pedit || act_vlan) && !act_redir) {
 628                 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n",
 629                            __func__);
 630                 return -EINVAL;
 631         }
 632
 633         return 0;
 634 }
 635
 636 int cxgb4_tc_flower_replace(struct net_device *dev,
 637                             struct flow_cls_offload *cls)
 638 {
 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;
 644         int ret;
 645
 646         if (cxgb4_validate_flow_actions(dev, cls))
 647                 return -EOPNOTSUPP;
 648
 649         if (cxgb4_validate_flow_match(dev, cls))
 650                 return -EOPNOTSUPP;
 651
 652         ch_flower = allocate_flower_entry();
 653         if (!ch_flower) {
 654                 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__);
 655                 return -ENOMEM;
 656         }
 657
 658         fs = &ch_flower->fs;
 659         fs->hitcnts = 1;
 660         cxgb4_process_flow_match(dev, cls, fs);
 661         cxgb4_process_flow_actions(dev, cls, fs);
 662
 663         fs->hash = is_filter_exact_match(adap, fs);
 664         if (fs->hash) {
 665                 fidx = 0;
 666         } else {
 667                 fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET);
 668                 if (fidx < 0) {
 669                         netdev_err(dev, "%s: No fidx for offload.\n", __func__);
 670                         ret = -ENOMEM;
 671                         goto free_entry;
 672                 }
 673         }
 674
 675         init_completion(&ctx.completion);
 676         ret = __cxgb4_set_filter(dev, fidx, fs, &ctx);
 677         if (ret) {
 678                 netdev_err(dev, "%s: filter creation err %d\n",
 679                            __func__, ret);
 680                 goto free_entry;
 681         }
 682
 683         /* Wait for reply */
 684         ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ);
 685         if (!ret) {
 686                 ret = -ETIMEDOUT;
 687                 goto free_entry;
 688         }
 689
 690         ret = ctx.result;
 691         /* Check if hw returned error for filter creation */
 692         if (ret)
 693                 goto free_entry;
 694
 695         ch_flower->tc_flower_cookie = cls->cookie;
 696         ch_flower->filter_id = ctx.tid;
 697         ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node,
 698                                      adap->flower_ht_params);
 699         if (ret)
 700                 goto del_filter;
 701
 702         return 0;
 703
 704 del_filter:
 705         cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
 706
 707 free_entry:
 708         kfree(ch_flower);
 709         return ret;
 710 }
 711
 712 int cxgb4_tc_flower_destroy(struct net_device *dev,
 713                             struct flow_cls_offload *cls)
 714 {
 715         struct adapter *adap = netdev2adap(dev);
 716         struct ch_tc_flower_entry *ch_flower;
 717         int ret;
 718
 719         ch_flower = ch_flower_lookup(adap, cls->cookie);
 720         if (!ch_flower)
 721                 return -ENOENT;
 722
 723         ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
 724         if (ret)
 725                 goto err;
 726
 727         ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node,
 728                                      adap->flower_ht_params);
 729         if (ret) {
 730                 netdev_err(dev, "Flow remove from rhashtable failed");
 731                 goto err;
 732         }
 733         kfree_rcu(ch_flower, rcu);
 734
 735 err:
 736         return ret;
 737 }
 738
 739 static void ch_flower_stats_handler(struct work_struct *work)
 740 {
 741         struct adapter *adap = container_of(work, struct adapter,
 742                                             flower_stats_work);
 743         struct ch_tc_flower_entry *flower_entry;
 744         struct ch_tc_flower_stats *ofld_stats;
 745         struct rhashtable_iter iter;
 746         u64 packets;
 747         u64 bytes;
 748         int ret;
 749
 750         rhashtable_walk_enter(&adap->flower_tbl, &iter);
 751         do {
 752                 rhashtable_walk_start(&iter);
 753
 754                 while ((flower_entry = rhashtable_walk_next(&iter)) &&
 755                        !IS_ERR(flower_entry)) {
 756                         ret = cxgb4_get_filter_counters(adap->port[0],
 757                                                         flower_entry->filter_id,
 758                                                         &packets, &bytes,
 759                                                         flower_entry->fs.hash);
 760                         if (!ret) {
 761                                 spin_lock(&flower_entry->lock);
 762                                 ofld_stats = &flower_entry->stats;
 763
 764                                 if (ofld_stats->prev_packet_count != packets) {
 765                                         ofld_stats->prev_packet_count = packets;
 766                                         ofld_stats->last_used = jiffies;
 767                                 }
 768                                 spin_unlock(&flower_entry->lock);
 769                         }
 770                 }
 771
 772                 rhashtable_walk_stop(&iter);
 773
 774         } while (flower_entry == ERR_PTR(-EAGAIN));
 775         rhashtable_walk_exit(&iter);
 776         mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
 777 }
 778
 779 static void ch_flower_stats_cb(struct timer_list *t)
 780 {
 781         struct adapter *adap = from_timer(adap, t, flower_stats_timer);
 782
 783         schedule_work(&adap->flower_stats_work);
 784 }
 785
 786 int cxgb4_tc_flower_stats(struct net_device *dev,
 787                           struct flow_cls_offload *cls)
 788 {
 789         struct adapter *adap = netdev2adap(dev);
 790         struct ch_tc_flower_stats *ofld_stats;
 791         struct ch_tc_flower_entry *ch_flower;
 792         u64 packets;
 793         u64 bytes;
 794         int ret;
 795
 796         ch_flower = ch_flower_lookup(adap, cls->cookie);
 797         if (!ch_flower) {
 798                 ret = -ENOENT;
 799                 goto err;
 800         }
 801
 802         ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id,
 803                                         &packets, &bytes,
 804                                         ch_flower->fs.hash);
 805         if (ret < 0)
 806                 goto err;
 807
 808         spin_lock_bh(&ch_flower->lock);
 809         ofld_stats = &ch_flower->stats;
 810         if (ofld_stats->packet_count != packets) {
 811                 if (ofld_stats->prev_packet_count != packets)
 812                         ofld_stats->last_used = jiffies;
 813                 flow_stats_update(&cls->stats, bytes - ofld_stats->byte_count,
 814                                   packets - ofld_stats->packet_count,
 815                                   ofld_stats->last_used);
 816
 817                 ofld_stats->packet_count = packets;
 818                 ofld_stats->byte_count = bytes;
 819                 ofld_stats->prev_packet_count = packets;
 820         }
 821         spin_unlock_bh(&ch_flower->lock);
 822         return 0;
 823
 824 err:
 825         return ret;
 826 }
 827
 828 static const struct rhashtable_params cxgb4_tc_flower_ht_params = {
 829         .nelem_hint = 384,
 830         .head_offset = offsetof(struct ch_tc_flower_entry, node),
 831         .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie),
 832         .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie),
 833         .max_size = 524288,
 834         .min_size = 512,
 835         .automatic_shrinking = true
 836 };
 837
 838 int cxgb4_init_tc_flower(struct adapter *adap)
 839 {
 840         int ret;
 841
 842         if (adap->tc_flower_initialized)
 843                 return -EEXIST;
 844
 845         adap->flower_ht_params = cxgb4_tc_flower_ht_params;
 846         ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params);
 847         if (ret)
 848                 return ret;
 849
 850         INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler);
 851         timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0);
 852         mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
 853         adap->tc_flower_initialized = true;
 854         return 0;
 855 }
 856
 857 void cxgb4_cleanup_tc_flower(struct adapter *adap)
 858 {
 859         if (!adap->tc_flower_initialized)
 860                 return;
 861
 862         if (adap->flower_stats_timer.function)
 863                 del_timer_sync(&adap->flower_stats_timer);
 864         cancel_work_sync(&adap->flower_stats_work);
 865         rhashtable_destroy(&adap->flower_tbl);
 866         adap->tc_flower_initialized = false;
 867 }