drivers/net/ethernet/netronome/nfp/flower/action.c

   1 /*
   2  * Copyright (C) 2017 Netronome Systems, Inc.
   3  *
   4  * This software is dual licensed under the GNU General License Version 2,
   5  * June 1991 as shown in the file COPYING in the top-level directory of this
   6  * source tree or the BSD 2-Clause License provided below.  You have the
   7  * option to license this software under the complete terms of either license.
   8  *
   9  * The BSD 2-Clause License:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      1. Redistributions of source code must retain the above
  16  *         copyright notice, this list of conditions and the following
  17  *         disclaimer.
  18  *
  19  *      2. Redistributions in binary form must reproduce the above
  20  *         copyright notice, this list of conditions and the following
  21  *         disclaimer in the documentation and/or other materials
  22  *         provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/bitfield.h>
  35 #include <net/geneve.h>
  36 #include <net/pkt_cls.h>
  37 #include <net/switchdev.h>
  38 #include <net/tc_act/tc_csum.h>
  39 #include <net/tc_act/tc_gact.h>
  40 #include <net/tc_act/tc_mirred.h>
  41 #include <net/tc_act/tc_pedit.h>
  42 #include <net/tc_act/tc_vlan.h>
  43 #include <net/tc_act/tc_tunnel_key.h>
  44
  45 #include "cmsg.h"
  46 #include "main.h"
  47 #include "../nfp_net_repr.h"
  48
  49 /* The kernel versions of TUNNEL_* are not ABI and therefore vulnerable
  50  * to change. Such changes will break our FW ABI.
  51  */
  52 #define NFP_FL_TUNNEL_CSUM                      cpu_to_be16(0x01)
  53 #define NFP_FL_TUNNEL_KEY                       cpu_to_be16(0x04)
  54 #define NFP_FL_TUNNEL_GENEVE_OPT                cpu_to_be16(0x0800)
  55 #define NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS      IP_TUNNEL_INFO_TX
  56 #define NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS     (NFP_FL_TUNNEL_CSUM | \
  57                                                  NFP_FL_TUNNEL_KEY | \
  58                                                  NFP_FL_TUNNEL_GENEVE_OPT)
  59
  60 static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
  61 {
  62         size_t act_size = sizeof(struct nfp_fl_pop_vlan);
  63
  64         pop_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_POP_VLAN;
  65         pop_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  66         pop_vlan->reserved = 0;
  67 }
  68
  69 static void
  70 nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
  71                  const struct tc_action *action)
  72 {
  73         size_t act_size = sizeof(struct nfp_fl_push_vlan);
  74         u16 tmp_push_vlan_tci;
  75
  76         push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN;
  77         push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  78         push_vlan->reserved = 0;
  79         push_vlan->vlan_tpid = tcf_vlan_push_proto(action);
  80
  81         tmp_push_vlan_tci =
  82                 FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, tcf_vlan_push_prio(action)) |
  83                 FIELD_PREP(NFP_FL_PUSH_VLAN_VID, tcf_vlan_push_vid(action)) |
  84                 NFP_FL_PUSH_VLAN_CFI;
  85         push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
  86 }
  87
  88 static int
  89 nfp_fl_pre_lag(struct nfp_app *app, const struct tc_action *action,
  90                struct nfp_fl_payload *nfp_flow, int act_len)
  91 {
  92         size_t act_size = sizeof(struct nfp_fl_pre_lag);
  93         struct nfp_fl_pre_lag *pre_lag;
  94         struct net_device *out_dev;
  95         int err;
  96
  97         out_dev = tcf_mirred_dev(action);
  98         if (!out_dev || !netif_is_lag_master(out_dev))
  99                 return 0;
 100
 101         if (act_len + act_size > NFP_FL_MAX_A_SIZ)
 102                 return -EOPNOTSUPP;
 103
 104         /* Pre_lag action must be first on action list.
 105          * If other actions already exist they need pushed forward.
 106          */
 107         if (act_len)
 108                 memmove(nfp_flow->action_data + act_size,
 109                         nfp_flow->action_data, act_len);
 110
 111         pre_lag = (struct nfp_fl_pre_lag *)nfp_flow->action_data;
 112         err = nfp_flower_lag_populate_pre_action(app, out_dev, pre_lag);
 113         if (err)
 114                 return err;
 115
 116         pre_lag->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_LAG;
 117         pre_lag->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 118
 119         nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 120
 121         return act_size;
 122 }
 123
 124 static bool nfp_fl_netdev_is_tunnel_type(struct net_device *out_dev,
 125                                          enum nfp_flower_tun_type tun_type)
 126 {
 127         if (!out_dev->rtnl_link_ops)
 128                 return false;
 129
 130         if (!strcmp(out_dev->rtnl_link_ops->kind, "vxlan"))
 131                 return tun_type == NFP_FL_TUNNEL_VXLAN;
 132
 133         if (!strcmp(out_dev->rtnl_link_ops->kind, "geneve"))
 134                 return tun_type == NFP_FL_TUNNEL_GENEVE;
 135
 136         return false;
 137 }
 138
 139 static int
 140 nfp_fl_output(struct nfp_app *app, struct nfp_fl_output *output,
 141               const struct tc_action *action, struct nfp_fl_payload *nfp_flow,
 142               bool last, struct net_device *in_dev,
 143               enum nfp_flower_tun_type tun_type, int *tun_out_cnt)
 144 {
 145         size_t act_size = sizeof(struct nfp_fl_output);
 146         struct nfp_flower_priv *priv = app->priv;
 147         struct net_device *out_dev;
 148         u16 tmp_flags;
 149
 150         output->head.jump_id = NFP_FL_ACTION_OPCODE_OUTPUT;
 151         output->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 152
 153         out_dev = tcf_mirred_dev(action);
 154         if (!out_dev)
 155                 return -EOPNOTSUPP;
 156
 157         tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0;
 158
 159         if (tun_type) {
 160                 /* Verify the egress netdev matches the tunnel type. */
 161                 if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type))
 162                         return -EOPNOTSUPP;
 163
 164                 if (*tun_out_cnt)
 165                         return -EOPNOTSUPP;
 166                 (*tun_out_cnt)++;
 167
 168                 output->flags = cpu_to_be16(tmp_flags |
 169                                             NFP_FL_OUT_FLAGS_USE_TUN);
 170                 output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
 171         } else if (netif_is_lag_master(out_dev) &&
 172                    priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
 173                 int gid;
 174
 175                 output->flags = cpu_to_be16(tmp_flags);
 176                 gid = nfp_flower_lag_get_output_id(app, out_dev);
 177                 if (gid < 0)
 178                         return gid;
 179                 output->port = cpu_to_be32(NFP_FL_LAG_OUT | gid);
 180         } else {
 181                 /* Set action output parameters. */
 182                 output->flags = cpu_to_be16(tmp_flags);
 183
 184                 /* Only offload if egress ports are on the same device as the
 185                  * ingress port.
 186                  */
 187                 if (!switchdev_port_same_parent_id(in_dev, out_dev))
 188                         return -EOPNOTSUPP;
 189                 if (!nfp_netdev_is_nfp_repr(out_dev))
 190                         return -EOPNOTSUPP;
 191
 192                 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
 193                 if (!output->port)
 194                         return -EOPNOTSUPP;
 195         }
 196         nfp_flow->meta.shortcut = output->port;
 197
 198         return 0;
 199 }
 200
 201 static enum nfp_flower_tun_type
 202 nfp_fl_get_tun_from_act_l4_port(struct nfp_app *app,
 203                                 const struct tc_action *action)
 204 {
 205         struct ip_tunnel_info *tun = tcf_tunnel_info(action);
 206         struct nfp_flower_priv *priv = app->priv;
 207
 208         switch (tun->key.tp_dst) {
 209         case htons(NFP_FL_VXLAN_PORT):
 210                 return NFP_FL_TUNNEL_VXLAN;
 211         case htons(NFP_FL_GENEVE_PORT):
 212                 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
 213                         return NFP_FL_TUNNEL_GENEVE;
 214                 /* FALLTHROUGH */
 215         default:
 216                 return NFP_FL_TUNNEL_NONE;
 217         }
 218 }
 219
 220 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
 221 {
 222         size_t act_size = sizeof(struct nfp_fl_pre_tunnel);
 223         struct nfp_fl_pre_tunnel *pre_tun_act;
 224
 225         /* Pre_tunnel action must be first on action list.
 226          * If other actions already exist they need to be pushed forward.
 227          */
 228         if (act_len)
 229                 memmove(act_data + act_size, act_data, act_len);
 230
 231         pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data;
 232
 233         memset(pre_tun_act, 0, act_size);
 234
 235         pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL;
 236         pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 237
 238         return pre_tun_act;
 239 }
 240
 241 static int
 242 nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len,
 243                            const struct tc_action *action)
 244 {
 245         struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
 246         int opt_len, opt_cnt, act_start, tot_push_len;
 247         u8 *src = ip_tunnel_info_opts(ip_tun);
 248
 249         /* We need to populate the options in reverse order for HW.
 250          * Therefore we go through the options, calculating the
 251          * number of options and the total size, then we populate
 252          * them in reverse order in the action list.
 253          */
 254         opt_cnt = 0;
 255         tot_push_len = 0;
 256         opt_len = ip_tun->options_len;
 257         while (opt_len > 0) {
 258                 struct geneve_opt *opt = (struct geneve_opt *)src;
 259
 260                 opt_cnt++;
 261                 if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT)
 262                         return -EOPNOTSUPP;
 263
 264                 tot_push_len += sizeof(struct nfp_fl_push_geneve) +
 265                                opt->length * 4;
 266                 if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT)
 267                         return -EOPNOTSUPP;
 268
 269                 opt_len -= sizeof(struct geneve_opt) + opt->length * 4;
 270                 src += sizeof(struct geneve_opt) + opt->length * 4;
 271         }
 272
 273         if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ)
 274                 return -EOPNOTSUPP;
 275
 276         act_start = *list_len;
 277         *list_len += tot_push_len;
 278         src = ip_tunnel_info_opts(ip_tun);
 279         while (opt_cnt) {
 280                 struct geneve_opt *opt = (struct geneve_opt *)src;
 281                 struct nfp_fl_push_geneve *push;
 282                 size_t act_size, len;
 283
 284                 opt_cnt--;
 285                 act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4;
 286                 tot_push_len -= act_size;
 287                 len = act_start + tot_push_len;
 288
 289                 push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len];
 290                 push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE;
 291                 push->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 292                 push->reserved = 0;
 293                 push->class = opt->opt_class;
 294                 push->type = opt->type;
 295                 push->length = opt->length;
 296                 memcpy(&push->opt_data, opt->opt_data, opt->length * 4);
 297
 298                 src += sizeof(struct geneve_opt) + opt->length * 4;
 299         }
 300
 301         return 0;
 302 }
 303
 304 static int
 305 nfp_fl_set_ipv4_udp_tun(struct nfp_app *app,
 306                         struct nfp_fl_set_ipv4_udp_tun *set_tun,
 307                         const struct tc_action *action,
 308                         struct nfp_fl_pre_tunnel *pre_tun,
 309                         enum nfp_flower_tun_type tun_type,
 310                         struct net_device *netdev)
 311 {
 312         size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun);
 313         struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
 314         struct nfp_flower_priv *priv = app->priv;
 315         u32 tmp_set_ip_tun_type_index = 0;
 316         /* Currently support one pre-tunnel so index is always 0. */
 317         int pretun_idx = 0;
 318
 319         BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM ||
 320                      NFP_FL_TUNNEL_KEY  != TUNNEL_KEY ||
 321                      NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT);
 322         if (ip_tun->options_len &&
 323             (tun_type != NFP_FL_TUNNEL_GENEVE ||
 324             !(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)))
 325                 return -EOPNOTSUPP;
 326
 327         set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
 328         set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 329
 330         /* Set tunnel type and pre-tunnel index. */
 331         tmp_set_ip_tun_type_index |=
 332                 FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, tun_type) |
 333                 FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx);
 334
 335         set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index);
 336         set_tun->tun_id = ip_tun->key.tun_id;
 337
 338         if (ip_tun->key.ttl) {
 339                 set_tun->ttl = ip_tun->key.ttl;
 340         } else {
 341                 struct net *net = dev_net(netdev);
 342                 struct flowi4 flow = {};
 343                 struct rtable *rt;
 344                 int err;
 345
 346                 /* Do a route lookup to determine ttl - if fails then use
 347                  * default. Note that CONFIG_INET is a requirement of
 348                  * CONFIG_NET_SWITCHDEV so must be defined here.
 349                  */
 350                 flow.daddr = ip_tun->key.u.ipv4.dst;
 351                 flow.flowi4_proto = IPPROTO_UDP;
 352                 rt = ip_route_output_key(net, &flow);
 353                 err = PTR_ERR_OR_ZERO(rt);
 354                 if (!err) {
 355                         set_tun->ttl = ip4_dst_hoplimit(&rt->dst);
 356                         ip_rt_put(rt);
 357                 } else {
 358                         set_tun->ttl = net->ipv4.sysctl_ip_default_ttl;
 359                 }
 360         }
 361
 362         set_tun->tos = ip_tun->key.tos;
 363
 364         if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) ||
 365             ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS)
 366                 return -EOPNOTSUPP;
 367         set_tun->tun_flags = ip_tun->key.tun_flags;
 368
 369         if (tun_type == NFP_FL_TUNNEL_GENEVE) {
 370                 set_tun->tun_proto = htons(ETH_P_TEB);
 371                 set_tun->tun_len = ip_tun->options_len / 4;
 372         }
 373
 374         /* Complete pre_tunnel action. */
 375         pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst;
 376
 377         return 0;
 378 }
 379
 380 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
 381 {
 382         u32 oldvalue = get_unaligned((u32 *)p_exact);
 383         u32 oldmask = get_unaligned((u32 *)p_mask);
 384
 385         value &= mask;
 386         value |= oldvalue & ~mask;
 387
 388         put_unaligned(oldmask | mask, (u32 *)p_mask);
 389         put_unaligned(value, (u32 *)p_exact);
 390 }
 391
 392 static int
 393 nfp_fl_set_eth(const struct tc_action *action, int idx, u32 off,
 394                struct nfp_fl_set_eth *set_eth)
 395 {
 396         u32 exact, mask;
 397
 398         if (off + 4 > ETH_ALEN * 2)
 399                 return -EOPNOTSUPP;
 400
 401         mask = ~tcf_pedit_mask(action, idx);
 402         exact = tcf_pedit_val(action, idx);
 403
 404         if (exact & ~mask)
 405                 return -EOPNOTSUPP;
 406
 407         nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off],
 408                             &set_eth->eth_addr_mask[off]);
 409
 410         set_eth->reserved = cpu_to_be16(0);
 411         set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET;
 412         set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ;
 413
 414         return 0;
 415 }
 416
 417 static int
 418 nfp_fl_set_ip4(const struct tc_action *action, int idx, u32 off,
 419                struct nfp_fl_set_ip4_addrs *set_ip_addr)
 420 {
 421         __be32 exact, mask;
 422
 423         /* We are expecting tcf_pedit to return a big endian value */
 424         mask = (__force __be32)~tcf_pedit_mask(action, idx);
 425         exact = (__force __be32)tcf_pedit_val(action, idx);
 426
 427         if (exact & ~mask)
 428                 return -EOPNOTSUPP;
 429
 430         switch (off) {
 431         case offsetof(struct iphdr, daddr):
 432                 set_ip_addr->ipv4_dst_mask = mask;
 433                 set_ip_addr->ipv4_dst = exact;
 434                 break;
 435         case offsetof(struct iphdr, saddr):
 436                 set_ip_addr->ipv4_src_mask = mask;
 437                 set_ip_addr->ipv4_src = exact;
 438                 break;
 439         default:
 440                 return -EOPNOTSUPP;
 441         }
 442
 443         set_ip_addr->reserved = cpu_to_be16(0);
 444         set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS;
 445         set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> NFP_FL_LW_SIZ;
 446
 447         return 0;
 448 }
 449
 450 static void
 451 nfp_fl_set_ip6_helper(int opcode_tag, int idx, __be32 exact, __be32 mask,
 452                       struct nfp_fl_set_ipv6_addr *ip6)
 453 {
 454         ip6->ipv6[idx % 4].mask = mask;
 455         ip6->ipv6[idx % 4].exact = exact;
 456
 457         ip6->reserved = cpu_to_be16(0);
 458         ip6->head.jump_id = opcode_tag;
 459         ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ;
 460 }
 461
 462 static int
 463 nfp_fl_set_ip6(const struct tc_action *action, int idx, u32 off,
 464                struct nfp_fl_set_ipv6_addr *ip_dst,
 465                struct nfp_fl_set_ipv6_addr *ip_src)
 466 {
 467         __be32 exact, mask;
 468
 469         /* We are expecting tcf_pedit to return a big endian value */
 470         mask = (__force __be32)~tcf_pedit_mask(action, idx);
 471         exact = (__force __be32)tcf_pedit_val(action, idx);
 472
 473         if (exact & ~mask)
 474                 return -EOPNOTSUPP;
 475
 476         if (off < offsetof(struct ipv6hdr, saddr))
 477                 return -EOPNOTSUPP;
 478         else if (off < offsetof(struct ipv6hdr, daddr))
 479                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, idx,
 480                                       exact, mask, ip_src);
 481         else if (off < offsetof(struct ipv6hdr, daddr) +
 482                        sizeof(struct in6_addr))
 483                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, idx,
 484                                       exact, mask, ip_dst);
 485         else
 486                 return -EOPNOTSUPP;
 487
 488         return 0;
 489 }
 490
 491 static int
 492 nfp_fl_set_tport(const struct tc_action *action, int idx, u32 off,
 493                  struct nfp_fl_set_tport *set_tport, int opcode)
 494 {
 495         u32 exact, mask;
 496
 497         if (off)
 498                 return -EOPNOTSUPP;
 499
 500         mask = ~tcf_pedit_mask(action, idx);
 501         exact = tcf_pedit_val(action, idx);
 502
 503         if (exact & ~mask)
 504                 return -EOPNOTSUPP;
 505
 506         nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val,
 507                             set_tport->tp_port_mask);
 508
 509         set_tport->reserved = cpu_to_be16(0);
 510         set_tport->head.jump_id = opcode;
 511         set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ;
 512
 513         return 0;
 514 }
 515
 516 static u32 nfp_fl_csum_l4_to_flag(u8 ip_proto)
 517 {
 518         switch (ip_proto) {
 519         case 0:
 520                 /* Filter doesn't force proto match,
 521                  * both TCP and UDP will be updated if encountered
 522                  */
 523                 return TCA_CSUM_UPDATE_FLAG_TCP | TCA_CSUM_UPDATE_FLAG_UDP;
 524         case IPPROTO_TCP:
 525                 return TCA_CSUM_UPDATE_FLAG_TCP;
 526         case IPPROTO_UDP:
 527                 return TCA_CSUM_UPDATE_FLAG_UDP;
 528         default:
 529                 /* All other protocols will be ignored by FW */
 530                 return 0;
 531         }
 532 }
 533
 534 static int
 535 nfp_fl_pedit(const struct tc_action *action, struct tc_cls_flower_offload *flow,
 536              char *nfp_action, int *a_len, u32 *csum_updated)
 537 {
 538         struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src;
 539         struct nfp_fl_set_ip4_addrs set_ip_addr;
 540         struct nfp_fl_set_tport set_tport;
 541         struct nfp_fl_set_eth set_eth;
 542         enum pedit_header_type htype;
 543         int idx, nkeys, err;
 544         size_t act_size;
 545         u32 offset, cmd;
 546         u8 ip_proto = 0;
 547
 548         memset(&set_ip6_dst, 0, sizeof(set_ip6_dst));
 549         memset(&set_ip6_src, 0, sizeof(set_ip6_src));
 550         memset(&set_ip_addr, 0, sizeof(set_ip_addr));
 551         memset(&set_tport, 0, sizeof(set_tport));
 552         memset(&set_eth, 0, sizeof(set_eth));
 553         nkeys = tcf_pedit_nkeys(action);
 554
 555         for (idx = 0; idx < nkeys; idx++) {
 556                 cmd = tcf_pedit_cmd(action, idx);
 557                 htype = tcf_pedit_htype(action, idx);
 558                 offset = tcf_pedit_offset(action, idx);
 559
 560                 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET)
 561                         return -EOPNOTSUPP;
 562
 563                 switch (htype) {
 564                 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
 565                         err = nfp_fl_set_eth(action, idx, offset, &set_eth);
 566                         break;
 567                 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
 568                         err = nfp_fl_set_ip4(action, idx, offset, &set_ip_addr);
 569                         break;
 570                 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
 571                         err = nfp_fl_set_ip6(action, idx, offset, &set_ip6_dst,
 572                                              &set_ip6_src);
 573                         break;
 574                 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
 575                         err = nfp_fl_set_tport(action, idx, offset, &set_tport,
 576                                                NFP_FL_ACTION_OPCODE_SET_TCP);
 577                         break;
 578                 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
 579                         err = nfp_fl_set_tport(action, idx, offset, &set_tport,
 580                                                NFP_FL_ACTION_OPCODE_SET_UDP);
 581                         break;
 582                 default:
 583                         return -EOPNOTSUPP;
 584                 }
 585                 if (err)
 586                         return err;
 587         }
 588
 589         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 590                 struct flow_dissector_key_basic *basic;
 591
 592                 basic = skb_flow_dissector_target(flow->dissector,
 593                                                   FLOW_DISSECTOR_KEY_BASIC,
 594                                                   flow->key);
 595                 ip_proto = basic->ip_proto;
 596         }
 597
 598         if (set_eth.head.len_lw) {
 599                 act_size = sizeof(set_eth);
 600                 memcpy(nfp_action, &set_eth, act_size);
 601                 *a_len += act_size;
 602         } else if (set_ip_addr.head.len_lw) {
 603                 act_size = sizeof(set_ip_addr);
 604                 memcpy(nfp_action, &set_ip_addr, act_size);
 605                 *a_len += act_size;
 606
 607                 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */
 608                 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR |
 609                                 nfp_fl_csum_l4_to_flag(ip_proto);
 610         } else if (set_ip6_dst.head.len_lw && set_ip6_src.head.len_lw) {
 611                 /* TC compiles set src and dst IPv6 address as a single action,
 612                  * the hardware requires this to be 2 separate actions.
 613                  */
 614                 act_size = sizeof(set_ip6_src);
 615                 memcpy(nfp_action, &set_ip6_src, act_size);
 616                 *a_len += act_size;
 617
 618                 act_size = sizeof(set_ip6_dst);
 619                 memcpy(&nfp_action[sizeof(set_ip6_src)], &set_ip6_dst,
 620                        act_size);
 621                 *a_len += act_size;
 622
 623                 /* Hardware will automatically fix TCP/UDP checksum. */
 624                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 625         } else if (set_ip6_dst.head.len_lw) {
 626                 act_size = sizeof(set_ip6_dst);
 627                 memcpy(nfp_action, &set_ip6_dst, act_size);
 628                 *a_len += act_size;
 629
 630                 /* Hardware will automatically fix TCP/UDP checksum. */
 631                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 632         } else if (set_ip6_src.head.len_lw) {
 633                 act_size = sizeof(set_ip6_src);
 634                 memcpy(nfp_action, &set_ip6_src, act_size);
 635                 *a_len += act_size;
 636
 637                 /* Hardware will automatically fix TCP/UDP checksum. */
 638                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 639         } else if (set_tport.head.len_lw) {
 640                 act_size = sizeof(set_tport);
 641                 memcpy(nfp_action, &set_tport, act_size);
 642                 *a_len += act_size;
 643
 644                 /* Hardware will automatically fix TCP/UDP checksum. */
 645                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int
 652 nfp_flower_output_action(struct nfp_app *app, const struct tc_action *a,
 653                          struct nfp_fl_payload *nfp_fl, int *a_len,
 654                          struct net_device *netdev, bool last,
 655                          enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 656                          int *out_cnt, u32 *csum_updated)
 657 {
 658         struct nfp_flower_priv *priv = app->priv;
 659         struct nfp_fl_output *output;
 660         int err, prelag_size;
 661
 662         /* If csum_updated has not been reset by now, it means HW will
 663          * incorrectly update csums when they are not requested.
 664          */
 665         if (*csum_updated)
 666                 return -EOPNOTSUPP;
 667
 668         if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ)
 669                 return -EOPNOTSUPP;
 670
 671         output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
 672         err = nfp_fl_output(app, output, a, nfp_fl, last, netdev, *tun_type,
 673                             tun_out_cnt);
 674         if (err)
 675                 return err;
 676
 677         *a_len += sizeof(struct nfp_fl_output);
 678
 679         if (priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
 680                 /* nfp_fl_pre_lag returns -err or size of prelag action added.
 681                  * This will be 0 if it is not egressing to a lag dev.
 682                  */
 683                 prelag_size = nfp_fl_pre_lag(app, a, nfp_fl, *a_len);
 684                 if (prelag_size < 0)
 685                         return prelag_size;
 686                 else if (prelag_size > 0 && (!last || *out_cnt))
 687                         return -EOPNOTSUPP;
 688
 689                 *a_len += prelag_size;
 690         }
 691         (*out_cnt)++;
 692
 693         return 0;
 694 }
 695
 696 static int
 697 nfp_flower_loop_action(struct nfp_app *app, const struct tc_action *a,
 698                        struct tc_cls_flower_offload *flow,
 699                        struct nfp_fl_payload *nfp_fl, int *a_len,
 700                        struct net_device *netdev,
 701                        enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 702                        int *out_cnt, u32 *csum_updated)
 703 {
 704         struct nfp_fl_set_ipv4_udp_tun *set_tun;
 705         struct nfp_fl_pre_tunnel *pre_tun;
 706         struct nfp_fl_push_vlan *psh_v;
 707         struct nfp_fl_pop_vlan *pop_v;
 708         int err;
 709
 710         if (is_tcf_gact_shot(a)) {
 711                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP);
 712         } else if (is_tcf_mirred_egress_redirect(a)) {
 713                 err = nfp_flower_output_action(app, a, nfp_fl, a_len, netdev,
 714                                                true, tun_type, tun_out_cnt,
 715                                                out_cnt, csum_updated);
 716                 if (err)
 717                         return err;
 718
 719         } else if (is_tcf_mirred_egress_mirror(a)) {
 720                 err = nfp_flower_output_action(app, a, nfp_fl, a_len, netdev,
 721                                                false, tun_type, tun_out_cnt,
 722                                                out_cnt, csum_updated);
 723                 if (err)
 724                         return err;
 725
 726         } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
 727                 if (*a_len + sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ)
 728                         return -EOPNOTSUPP;
 729
 730                 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len];
 731                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV);
 732
 733                 nfp_fl_pop_vlan(pop_v);
 734                 *a_len += sizeof(struct nfp_fl_pop_vlan);
 735         } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
 736                 if (*a_len + sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ)
 737                         return -EOPNOTSUPP;
 738
 739                 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len];
 740                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 741
 742                 nfp_fl_push_vlan(psh_v, a);
 743                 *a_len += sizeof(struct nfp_fl_push_vlan);
 744         } else if (is_tcf_tunnel_set(a)) {
 745                 struct ip_tunnel_info *ip_tun = tcf_tunnel_info(a);
 746                 struct nfp_repr *repr = netdev_priv(netdev);
 747
 748                 *tun_type = nfp_fl_get_tun_from_act_l4_port(repr->app, a);
 749                 if (*tun_type == NFP_FL_TUNNEL_NONE)
 750                         return -EOPNOTSUPP;
 751
 752                 if (ip_tun->mode & ~NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS)
 753                         return -EOPNOTSUPP;
 754
 755                 /* Pre-tunnel action is required for tunnel encap.
 756                  * This checks for next hop entries on NFP.
 757                  * If none, the packet falls back before applying other actions.
 758                  */
 759                 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) +
 760                     sizeof(struct nfp_fl_set_ipv4_udp_tun) > NFP_FL_MAX_A_SIZ)
 761                         return -EOPNOTSUPP;
 762
 763                 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len);
 764                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 765                 *a_len += sizeof(struct nfp_fl_pre_tunnel);
 766
 767                 err = nfp_fl_push_geneve_options(nfp_fl, a_len, a);
 768                 if (err)
 769                         return err;
 770
 771                 set_tun = (void *)&nfp_fl->action_data[*a_len];
 772                 err = nfp_fl_set_ipv4_udp_tun(app, set_tun, a, pre_tun,
 773                                               *tun_type, netdev);
 774                 if (err)
 775                         return err;
 776                 *a_len += sizeof(struct nfp_fl_set_ipv4_udp_tun);
 777         } else if (is_tcf_tunnel_release(a)) {
 778                 /* Tunnel decap is handled by default so accept action. */
 779                 return 0;
 780         } else if (is_tcf_pedit(a)) {
 781                 if (nfp_fl_pedit(a, flow, &nfp_fl->action_data[*a_len],
 782                                  a_len, csum_updated))
 783                         return -EOPNOTSUPP;
 784         } else if (is_tcf_csum(a)) {
 785                 /* csum action requests recalc of something we have not fixed */
 786                 if (tcf_csum_update_flags(a) & ~*csum_updated)
 787                         return -EOPNOTSUPP;
 788                 /* If we will correctly fix the csum we can remove it from the
 789                  * csum update list. Which will later be used to check support.
 790                  */
 791                 *csum_updated &= ~tcf_csum_update_flags(a);
 792         } else {
 793                 /* Currently we do not handle any other actions. */
 794                 return -EOPNOTSUPP;
 795         }
 796
 797         return 0;
 798 }
 799
 800 int nfp_flower_compile_action(struct nfp_app *app,
 801                               struct tc_cls_flower_offload *flow,
 802                               struct net_device *netdev,
 803                               struct nfp_fl_payload *nfp_flow)
 804 {
 805         int act_len, act_cnt, err, tun_out_cnt, out_cnt, i;
 806         enum nfp_flower_tun_type tun_type;
 807         const struct tc_action *a;
 808         u32 csum_updated = 0;
 809
 810         memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
 811         nfp_flow->meta.act_len = 0;
 812         tun_type = NFP_FL_TUNNEL_NONE;
 813         act_len = 0;
 814         act_cnt = 0;
 815         tun_out_cnt = 0;
 816         out_cnt = 0;
 817
 818         tcf_exts_for_each_action(i, a, flow->exts) {
 819                 err = nfp_flower_loop_action(app, a, flow, nfp_flow, &act_len,
 820                                              netdev, &tun_type, &tun_out_cnt,
 821                                              &out_cnt, &csum_updated);
 822                 if (err)
 823                         return err;
 824                 act_cnt++;
 825         }
 826
 827         /* We optimise when the action list is small, this can unfortunately
 828          * not happen once we have more than one action in the action list.
 829          */
 830         if (act_cnt > 1)
 831                 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 832
 833         nfp_flow->meta.act_len = act_len;
 834
 835         return 0;
 836 }