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_IPV4_UDP_TUN_FLAGS     (NFP_FL_TUNNEL_CSUM | \
  56                                                  NFP_FL_TUNNEL_KEY | \
  57                                                  NFP_FL_TUNNEL_GENEVE_OPT)
  58
  59 static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
  60 {
  61         size_t act_size = sizeof(struct nfp_fl_pop_vlan);
  62
  63         pop_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_POP_VLAN;
  64         pop_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  65         pop_vlan->reserved = 0;
  66 }
  67
  68 static void
  69 nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
  70                  const struct tc_action *action)
  71 {
  72         size_t act_size = sizeof(struct nfp_fl_push_vlan);
  73         u16 tmp_push_vlan_tci;
  74
  75         push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN;
  76         push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  77         push_vlan->reserved = 0;
  78         push_vlan->vlan_tpid = tcf_vlan_push_proto(action);
  79
  80         tmp_push_vlan_tci =
  81                 FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, tcf_vlan_push_prio(action)) |
  82                 FIELD_PREP(NFP_FL_PUSH_VLAN_VID, tcf_vlan_push_vid(action)) |
  83                 NFP_FL_PUSH_VLAN_CFI;
  84         push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
  85 }
  86
  87 static int
  88 nfp_fl_pre_lag(struct nfp_app *app, const struct tc_action *action,
  89                struct nfp_fl_payload *nfp_flow, int act_len)
  90 {
  91         size_t act_size = sizeof(struct nfp_fl_pre_lag);
  92         struct nfp_fl_pre_lag *pre_lag;
  93         struct net_device *out_dev;
  94         int err;
  95
  96         out_dev = tcf_mirred_dev(action);
  97         if (!out_dev || !netif_is_lag_master(out_dev))
  98                 return 0;
  99
 100         if (act_len + act_size > NFP_FL_MAX_A_SIZ)
 101                 return -EOPNOTSUPP;
 102
 103         /* Pre_lag action must be first on action list.
 104          * If other actions already exist they need pushed forward.
 105          */
 106         if (act_len)
 107                 memmove(nfp_flow->action_data + act_size,
 108                         nfp_flow->action_data, act_len);
 109
 110         pre_lag = (struct nfp_fl_pre_lag *)nfp_flow->action_data;
 111         err = nfp_flower_lag_populate_pre_action(app, out_dev, pre_lag);
 112         if (err)
 113                 return err;
 114
 115         pre_lag->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_LAG;
 116         pre_lag->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 117
 118         nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 119
 120         return act_size;
 121 }
 122
 123 static bool nfp_fl_netdev_is_tunnel_type(struct net_device *out_dev,
 124                                          enum nfp_flower_tun_type tun_type)
 125 {
 126         if (!out_dev->rtnl_link_ops)
 127                 return false;
 128
 129         if (!strcmp(out_dev->rtnl_link_ops->kind, "vxlan"))
 130                 return tun_type == NFP_FL_TUNNEL_VXLAN;
 131
 132         if (!strcmp(out_dev->rtnl_link_ops->kind, "geneve"))
 133                 return tun_type == NFP_FL_TUNNEL_GENEVE;
 134
 135         return false;
 136 }
 137
 138 static int
 139 nfp_fl_output(struct nfp_app *app, struct nfp_fl_output *output,
 140               const struct tc_action *action, struct nfp_fl_payload *nfp_flow,
 141               bool last, struct net_device *in_dev,
 142               enum nfp_flower_tun_type tun_type, int *tun_out_cnt)
 143 {
 144         size_t act_size = sizeof(struct nfp_fl_output);
 145         struct nfp_flower_priv *priv = app->priv;
 146         struct net_device *out_dev;
 147         u16 tmp_flags;
 148
 149         output->head.jump_id = NFP_FL_ACTION_OPCODE_OUTPUT;
 150         output->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 151
 152         out_dev = tcf_mirred_dev(action);
 153         if (!out_dev)
 154                 return -EOPNOTSUPP;
 155
 156         tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0;
 157
 158         if (tun_type) {
 159                 /* Verify the egress netdev matches the tunnel type. */
 160                 if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type))
 161                         return -EOPNOTSUPP;
 162
 163                 if (*tun_out_cnt)
 164                         return -EOPNOTSUPP;
 165                 (*tun_out_cnt)++;
 166
 167                 output->flags = cpu_to_be16(tmp_flags |
 168                                             NFP_FL_OUT_FLAGS_USE_TUN);
 169                 output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
 170         } else if (netif_is_lag_master(out_dev) &&
 171                    priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
 172                 int gid;
 173
 174                 output->flags = cpu_to_be16(tmp_flags);
 175                 gid = nfp_flower_lag_get_output_id(app, out_dev);
 176                 if (gid < 0)
 177                         return gid;
 178                 output->port = cpu_to_be32(NFP_FL_LAG_OUT | gid);
 179         } else {
 180                 /* Set action output parameters. */
 181                 output->flags = cpu_to_be16(tmp_flags);
 182
 183                 /* Only offload if egress ports are on the same device as the
 184                  * ingress port.
 185                  */
 186                 if (!switchdev_port_same_parent_id(in_dev, out_dev))
 187                         return -EOPNOTSUPP;
 188                 if (!nfp_netdev_is_nfp_repr(out_dev))
 189                         return -EOPNOTSUPP;
 190
 191                 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
 192                 if (!output->port)
 193                         return -EOPNOTSUPP;
 194         }
 195         nfp_flow->meta.shortcut = output->port;
 196
 197         return 0;
 198 }
 199
 200 static enum nfp_flower_tun_type
 201 nfp_fl_get_tun_from_act_l4_port(struct nfp_app *app,
 202                                 const struct tc_action *action)
 203 {
 204         struct ip_tunnel_info *tun = tcf_tunnel_info(action);
 205         struct nfp_flower_priv *priv = app->priv;
 206
 207         switch (tun->key.tp_dst) {
 208         case htons(NFP_FL_VXLAN_PORT):
 209                 return NFP_FL_TUNNEL_VXLAN;
 210         case htons(NFP_FL_GENEVE_PORT):
 211                 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
 212                         return NFP_FL_TUNNEL_GENEVE;
 213                 /* FALLTHROUGH */
 214         default:
 215                 return NFP_FL_TUNNEL_NONE;
 216         }
 217 }
 218
 219 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
 220 {
 221         size_t act_size = sizeof(struct nfp_fl_pre_tunnel);
 222         struct nfp_fl_pre_tunnel *pre_tun_act;
 223
 224         /* Pre_tunnel action must be first on action list.
 225          * If other actions already exist they need to be pushed forward.
 226          */
 227         if (act_len)
 228                 memmove(act_data + act_size, act_data, act_len);
 229
 230         pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data;
 231
 232         memset(pre_tun_act, 0, act_size);
 233
 234         pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL;
 235         pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 236
 237         return pre_tun_act;
 238 }
 239
 240 static int
 241 nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len,
 242                            const struct tc_action *action)
 243 {
 244         struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
 245         int opt_len, opt_cnt, act_start, tot_push_len;
 246         u8 *src = ip_tunnel_info_opts(ip_tun);
 247
 248         /* We need to populate the options in reverse order for HW.
 249          * Therefore we go through the options, calculating the
 250          * number of options and the total size, then we populate
 251          * them in reverse order in the action list.
 252          */
 253         opt_cnt = 0;
 254         tot_push_len = 0;
 255         opt_len = ip_tun->options_len;
 256         while (opt_len > 0) {
 257                 struct geneve_opt *opt = (struct geneve_opt *)src;
 258
 259                 opt_cnt++;
 260                 if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT)
 261                         return -EOPNOTSUPP;
 262
 263                 tot_push_len += sizeof(struct nfp_fl_push_geneve) +
 264                                opt->length * 4;
 265                 if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT)
 266                         return -EOPNOTSUPP;
 267
 268                 opt_len -= sizeof(struct geneve_opt) + opt->length * 4;
 269                 src += sizeof(struct geneve_opt) + opt->length * 4;
 270         }
 271
 272         if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ)
 273                 return -EOPNOTSUPP;
 274
 275         act_start = *list_len;
 276         *list_len += tot_push_len;
 277         src = ip_tunnel_info_opts(ip_tun);
 278         while (opt_cnt) {
 279                 struct geneve_opt *opt = (struct geneve_opt *)src;
 280                 struct nfp_fl_push_geneve *push;
 281                 size_t act_size, len;
 282
 283                 opt_cnt--;
 284                 act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4;
 285                 tot_push_len -= act_size;
 286                 len = act_start + tot_push_len;
 287
 288                 push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len];
 289                 push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE;
 290                 push->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 291                 push->reserved = 0;
 292                 push->class = opt->opt_class;
 293                 push->type = opt->type;
 294                 push->length = opt->length;
 295                 memcpy(&push->opt_data, opt->opt_data, opt->length * 4);
 296
 297                 src += sizeof(struct geneve_opt) + opt->length * 4;
 298         }
 299
 300         return 0;
 301 }
 302
 303 static int
 304 nfp_fl_set_ipv4_udp_tun(struct nfp_app *app,
 305                         struct nfp_fl_set_ipv4_udp_tun *set_tun,
 306                         const struct tc_action *action,
 307                         struct nfp_fl_pre_tunnel *pre_tun,
 308                         enum nfp_flower_tun_type tun_type,
 309                         struct net_device *netdev)
 310 {
 311         size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun);
 312         struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
 313         struct nfp_flower_priv *priv = app->priv;
 314         u32 tmp_set_ip_tun_type_index = 0;
 315         /* Currently support one pre-tunnel so index is always 0. */
 316         int pretun_idx = 0;
 317
 318         BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM ||
 319                      NFP_FL_TUNNEL_KEY  != TUNNEL_KEY ||
 320                      NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT);
 321         if (ip_tun->options_len &&
 322             (tun_type != NFP_FL_TUNNEL_GENEVE ||
 323             !(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)))
 324                 return -EOPNOTSUPP;
 325
 326         set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
 327         set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 328
 329         /* Set tunnel type and pre-tunnel index. */
 330         tmp_set_ip_tun_type_index |=
 331                 FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, tun_type) |
 332                 FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx);
 333
 334         set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index);
 335         set_tun->tun_id = ip_tun->key.tun_id;
 336
 337         if (ip_tun->key.ttl) {
 338                 set_tun->ttl = ip_tun->key.ttl;
 339         } else {
 340                 struct net *net = dev_net(netdev);
 341                 struct flowi4 flow = {};
 342                 struct rtable *rt;
 343                 int err;
 344
 345                 /* Do a route lookup to determine ttl - if fails then use
 346                  * default. Note that CONFIG_INET is a requirement of
 347                  * CONFIG_NET_SWITCHDEV so must be defined here.
 348                  */
 349                 flow.daddr = ip_tun->key.u.ipv4.dst;
 350                 flow.flowi4_proto = IPPROTO_UDP;
 351                 rt = ip_route_output_key(net, &flow);
 352                 err = PTR_ERR_OR_ZERO(rt);
 353                 if (!err) {
 354                         set_tun->ttl = ip4_dst_hoplimit(&rt->dst);
 355                         ip_rt_put(rt);
 356                 } else {
 357                         set_tun->ttl = net->ipv4.sysctl_ip_default_ttl;
 358                 }
 359         }
 360
 361         set_tun->tos = ip_tun->key.tos;
 362
 363         if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) ||
 364             ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS)
 365                 return -EOPNOTSUPP;
 366         set_tun->tun_flags = ip_tun->key.tun_flags;
 367
 368         if (tun_type == NFP_FL_TUNNEL_GENEVE) {
 369                 set_tun->tun_proto = htons(ETH_P_TEB);
 370                 set_tun->tun_len = ip_tun->options_len / 4;
 371         }
 372
 373         /* Complete pre_tunnel action. */
 374         pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst;
 375
 376         return 0;
 377 }
 378
 379 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
 380 {
 381         u32 oldvalue = get_unaligned((u32 *)p_exact);
 382         u32 oldmask = get_unaligned((u32 *)p_mask);
 383
 384         value &= mask;
 385         value |= oldvalue & ~mask;
 386
 387         put_unaligned(oldmask | mask, (u32 *)p_mask);
 388         put_unaligned(value, (u32 *)p_exact);
 389 }
 390
 391 static int
 392 nfp_fl_set_eth(const struct tc_action *action, int idx, u32 off,
 393                struct nfp_fl_set_eth *set_eth)
 394 {
 395         u32 exact, mask;
 396
 397         if (off + 4 > ETH_ALEN * 2)
 398                 return -EOPNOTSUPP;
 399
 400         mask = ~tcf_pedit_mask(action, idx);
 401         exact = tcf_pedit_val(action, idx);
 402
 403         if (exact & ~mask)
 404                 return -EOPNOTSUPP;
 405
 406         nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off],
 407                             &set_eth->eth_addr_mask[off]);
 408
 409         set_eth->reserved = cpu_to_be16(0);
 410         set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET;
 411         set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ;
 412
 413         return 0;
 414 }
 415
 416 static int
 417 nfp_fl_set_ip4(const struct tc_action *action, int idx, u32 off,
 418                struct nfp_fl_set_ip4_addrs *set_ip_addr)
 419 {
 420         __be32 exact, mask;
 421
 422         /* We are expecting tcf_pedit to return a big endian value */
 423         mask = (__force __be32)~tcf_pedit_mask(action, idx);
 424         exact = (__force __be32)tcf_pedit_val(action, idx);
 425
 426         if (exact & ~mask)
 427                 return -EOPNOTSUPP;
 428
 429         switch (off) {
 430         case offsetof(struct iphdr, daddr):
 431                 set_ip_addr->ipv4_dst_mask = mask;
 432                 set_ip_addr->ipv4_dst = exact;
 433                 break;
 434         case offsetof(struct iphdr, saddr):
 435                 set_ip_addr->ipv4_src_mask = mask;
 436                 set_ip_addr->ipv4_src = exact;
 437                 break;
 438         default:
 439                 return -EOPNOTSUPP;
 440         }
 441
 442         set_ip_addr->reserved = cpu_to_be16(0);
 443         set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS;
 444         set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> NFP_FL_LW_SIZ;
 445
 446         return 0;
 447 }
 448
 449 static void
 450 nfp_fl_set_ip6_helper(int opcode_tag, int idx, __be32 exact, __be32 mask,
 451                       struct nfp_fl_set_ipv6_addr *ip6)
 452 {
 453         ip6->ipv6[idx % 4].mask = mask;
 454         ip6->ipv6[idx % 4].exact = exact;
 455
 456         ip6->reserved = cpu_to_be16(0);
 457         ip6->head.jump_id = opcode_tag;
 458         ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ;
 459 }
 460
 461 static int
 462 nfp_fl_set_ip6(const struct tc_action *action, int idx, u32 off,
 463                struct nfp_fl_set_ipv6_addr *ip_dst,
 464                struct nfp_fl_set_ipv6_addr *ip_src)
 465 {
 466         __be32 exact, mask;
 467
 468         /* We are expecting tcf_pedit to return a big endian value */
 469         mask = (__force __be32)~tcf_pedit_mask(action, idx);
 470         exact = (__force __be32)tcf_pedit_val(action, idx);
 471
 472         if (exact & ~mask)
 473                 return -EOPNOTSUPP;
 474
 475         if (off < offsetof(struct ipv6hdr, saddr))
 476                 return -EOPNOTSUPP;
 477         else if (off < offsetof(struct ipv6hdr, daddr))
 478                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, idx,
 479                                       exact, mask, ip_src);
 480         else if (off < offsetof(struct ipv6hdr, daddr) +
 481                        sizeof(struct in6_addr))
 482                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, idx,
 483                                       exact, mask, ip_dst);
 484         else
 485                 return -EOPNOTSUPP;
 486
 487         return 0;
 488 }
 489
 490 static int
 491 nfp_fl_set_tport(const struct tc_action *action, int idx, u32 off,
 492                  struct nfp_fl_set_tport *set_tport, int opcode)
 493 {
 494         u32 exact, mask;
 495
 496         if (off)
 497                 return -EOPNOTSUPP;
 498
 499         mask = ~tcf_pedit_mask(action, idx);
 500         exact = tcf_pedit_val(action, idx);
 501
 502         if (exact & ~mask)
 503                 return -EOPNOTSUPP;
 504
 505         nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val,
 506                             set_tport->tp_port_mask);
 507
 508         set_tport->reserved = cpu_to_be16(0);
 509         set_tport->head.jump_id = opcode;
 510         set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ;
 511
 512         return 0;
 513 }
 514
 515 static u32 nfp_fl_csum_l4_to_flag(u8 ip_proto)
 516 {
 517         switch (ip_proto) {
 518         case 0:
 519                 /* Filter doesn't force proto match,
 520                  * both TCP and UDP will be updated if encountered
 521                  */
 522                 return TCA_CSUM_UPDATE_FLAG_TCP | TCA_CSUM_UPDATE_FLAG_UDP;
 523         case IPPROTO_TCP:
 524                 return TCA_CSUM_UPDATE_FLAG_TCP;
 525         case IPPROTO_UDP:
 526                 return TCA_CSUM_UPDATE_FLAG_UDP;
 527         default:
 528                 /* All other protocols will be ignored by FW */
 529                 return 0;
 530         }
 531 }
 532
 533 static int
 534 nfp_fl_pedit(const struct tc_action *action, struct tc_cls_flower_offload *flow,
 535              char *nfp_action, int *a_len, u32 *csum_updated)
 536 {
 537         struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src;
 538         struct nfp_fl_set_ip4_addrs set_ip_addr;
 539         struct nfp_fl_set_tport set_tport;
 540         struct nfp_fl_set_eth set_eth;
 541         enum pedit_header_type htype;
 542         int idx, nkeys, err;
 543         size_t act_size;
 544         u32 offset, cmd;
 545         u8 ip_proto = 0;
 546
 547         memset(&set_ip6_dst, 0, sizeof(set_ip6_dst));
 548         memset(&set_ip6_src, 0, sizeof(set_ip6_src));
 549         memset(&set_ip_addr, 0, sizeof(set_ip_addr));
 550         memset(&set_tport, 0, sizeof(set_tport));
 551         memset(&set_eth, 0, sizeof(set_eth));
 552         nkeys = tcf_pedit_nkeys(action);
 553
 554         for (idx = 0; idx < nkeys; idx++) {
 555                 cmd = tcf_pedit_cmd(action, idx);
 556                 htype = tcf_pedit_htype(action, idx);
 557                 offset = tcf_pedit_offset(action, idx);
 558
 559                 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET)
 560                         return -EOPNOTSUPP;
 561
 562                 switch (htype) {
 563                 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
 564                         err = nfp_fl_set_eth(action, idx, offset, &set_eth);
 565                         break;
 566                 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
 567                         err = nfp_fl_set_ip4(action, idx, offset, &set_ip_addr);
 568                         break;
 569                 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
 570                         err = nfp_fl_set_ip6(action, idx, offset, &set_ip6_dst,
 571                                              &set_ip6_src);
 572                         break;
 573                 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
 574                         err = nfp_fl_set_tport(action, idx, offset, &set_tport,
 575                                                NFP_FL_ACTION_OPCODE_SET_TCP);
 576                         break;
 577                 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
 578                         err = nfp_fl_set_tport(action, idx, offset, &set_tport,
 579                                                NFP_FL_ACTION_OPCODE_SET_UDP);
 580                         break;
 581                 default:
 582                         return -EOPNOTSUPP;
 583                 }
 584                 if (err)
 585                         return err;
 586         }
 587
 588         if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 589                 struct flow_dissector_key_basic *basic;
 590
 591                 basic = skb_flow_dissector_target(flow->dissector,
 592                                                   FLOW_DISSECTOR_KEY_BASIC,
 593                                                   flow->key);
 594                 ip_proto = basic->ip_proto;
 595         }
 596
 597         if (set_eth.head.len_lw) {
 598                 act_size = sizeof(set_eth);
 599                 memcpy(nfp_action, &set_eth, act_size);
 600                 *a_len += act_size;
 601         } else if (set_ip_addr.head.len_lw) {
 602                 act_size = sizeof(set_ip_addr);
 603                 memcpy(nfp_action, &set_ip_addr, act_size);
 604                 *a_len += act_size;
 605
 606                 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */
 607                 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR |
 608                                 nfp_fl_csum_l4_to_flag(ip_proto);
 609         } else if (set_ip6_dst.head.len_lw && set_ip6_src.head.len_lw) {
 610                 /* TC compiles set src and dst IPv6 address as a single action,
 611                  * the hardware requires this to be 2 separate actions.
 612                  */
 613                 act_size = sizeof(set_ip6_src);
 614                 memcpy(nfp_action, &set_ip6_src, act_size);
 615                 *a_len += act_size;
 616
 617                 act_size = sizeof(set_ip6_dst);
 618                 memcpy(&nfp_action[sizeof(set_ip6_src)], &set_ip6_dst,
 619                        act_size);
 620                 *a_len += act_size;
 621
 622                 /* Hardware will automatically fix TCP/UDP checksum. */
 623                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 624         } else if (set_ip6_dst.head.len_lw) {
 625                 act_size = sizeof(set_ip6_dst);
 626                 memcpy(nfp_action, &set_ip6_dst, act_size);
 627                 *a_len += act_size;
 628
 629                 /* Hardware will automatically fix TCP/UDP checksum. */
 630                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 631         } else if (set_ip6_src.head.len_lw) {
 632                 act_size = sizeof(set_ip6_src);
 633                 memcpy(nfp_action, &set_ip6_src, act_size);
 634                 *a_len += act_size;
 635
 636                 /* Hardware will automatically fix TCP/UDP checksum. */
 637                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 638         } else if (set_tport.head.len_lw) {
 639                 act_size = sizeof(set_tport);
 640                 memcpy(nfp_action, &set_tport, act_size);
 641                 *a_len += act_size;
 642
 643                 /* Hardware will automatically fix TCP/UDP checksum. */
 644                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 645         }
 646
 647         return 0;
 648 }
 649
 650 static int
 651 nfp_flower_output_action(struct nfp_app *app, const struct tc_action *a,
 652                          struct nfp_fl_payload *nfp_fl, int *a_len,
 653                          struct net_device *netdev, bool last,
 654                          enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 655                          int *out_cnt, u32 *csum_updated)
 656 {
 657         struct nfp_flower_priv *priv = app->priv;
 658         struct nfp_fl_output *output;
 659         int err, prelag_size;
 660
 661         /* If csum_updated has not been reset by now, it means HW will
 662          * incorrectly update csums when they are not requested.
 663          */
 664         if (*csum_updated)
 665                 return -EOPNOTSUPP;
 666
 667         if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ)
 668                 return -EOPNOTSUPP;
 669
 670         output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
 671         err = nfp_fl_output(app, output, a, nfp_fl, last, netdev, *tun_type,
 672                             tun_out_cnt);
 673         if (err)
 674                 return err;
 675
 676         *a_len += sizeof(struct nfp_fl_output);
 677
 678         if (priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
 679                 /* nfp_fl_pre_lag returns -err or size of prelag action added.
 680                  * This will be 0 if it is not egressing to a lag dev.
 681                  */
 682                 prelag_size = nfp_fl_pre_lag(app, a, nfp_fl, *a_len);
 683                 if (prelag_size < 0)
 684                         return prelag_size;
 685                 else if (prelag_size > 0 && (!last || *out_cnt))
 686                         return -EOPNOTSUPP;
 687
 688                 *a_len += prelag_size;
 689         }
 690         (*out_cnt)++;
 691
 692         return 0;
 693 }
 694
 695 static int
 696 nfp_flower_loop_action(struct nfp_app *app, const struct tc_action *a,
 697                        struct tc_cls_flower_offload *flow,
 698                        struct nfp_fl_payload *nfp_fl, int *a_len,
 699                        struct net_device *netdev,
 700                        enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 701                        int *out_cnt, u32 *csum_updated)
 702 {
 703         struct nfp_fl_set_ipv4_udp_tun *set_tun;
 704         struct nfp_fl_pre_tunnel *pre_tun;
 705         struct nfp_fl_push_vlan *psh_v;
 706         struct nfp_fl_pop_vlan *pop_v;
 707         int err;
 708
 709         if (is_tcf_gact_shot(a)) {
 710                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP);
 711         } else if (is_tcf_mirred_egress_redirect(a)) {
 712                 err = nfp_flower_output_action(app, a, nfp_fl, a_len, netdev,
 713                                                true, tun_type, tun_out_cnt,
 714                                                out_cnt, csum_updated);
 715                 if (err)
 716                         return err;
 717
 718         } else if (is_tcf_mirred_egress_mirror(a)) {
 719                 err = nfp_flower_output_action(app, a, nfp_fl, a_len, netdev,
 720                                                false, tun_type, tun_out_cnt,
 721                                                out_cnt, csum_updated);
 722                 if (err)
 723                         return err;
 724
 725         } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
 726                 if (*a_len + sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ)
 727                         return -EOPNOTSUPP;
 728
 729                 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len];
 730                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV);
 731
 732                 nfp_fl_pop_vlan(pop_v);
 733                 *a_len += sizeof(struct nfp_fl_pop_vlan);
 734         } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
 735                 if (*a_len + sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ)
 736                         return -EOPNOTSUPP;
 737
 738                 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len];
 739                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 740
 741                 nfp_fl_push_vlan(psh_v, a);
 742                 *a_len += sizeof(struct nfp_fl_push_vlan);
 743         } else if (is_tcf_tunnel_set(a)) {
 744                 struct nfp_repr *repr = netdev_priv(netdev);
 745                 *tun_type = nfp_fl_get_tun_from_act_l4_port(repr->app, a);
 746                 if (*tun_type == NFP_FL_TUNNEL_NONE)
 747                         return -EOPNOTSUPP;
 748
 749                 /* Pre-tunnel action is required for tunnel encap.
 750                  * This checks for next hop entries on NFP.
 751                  * If none, the packet falls back before applying other actions.
 752                  */
 753                 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) +
 754                     sizeof(struct nfp_fl_set_ipv4_udp_tun) > NFP_FL_MAX_A_SIZ)
 755                         return -EOPNOTSUPP;
 756
 757                 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len);
 758                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 759                 *a_len += sizeof(struct nfp_fl_pre_tunnel);
 760
 761                 err = nfp_fl_push_geneve_options(nfp_fl, a_len, a);
 762                 if (err)
 763                         return err;
 764
 765                 set_tun = (void *)&nfp_fl->action_data[*a_len];
 766                 err = nfp_fl_set_ipv4_udp_tun(app, set_tun, a, pre_tun,
 767                                               *tun_type, netdev);
 768                 if (err)
 769                         return err;
 770                 *a_len += sizeof(struct nfp_fl_set_ipv4_udp_tun);
 771         } else if (is_tcf_tunnel_release(a)) {
 772                 /* Tunnel decap is handled by default so accept action. */
 773                 return 0;
 774         } else if (is_tcf_pedit(a)) {
 775                 if (nfp_fl_pedit(a, flow, &nfp_fl->action_data[*a_len],
 776                                  a_len, csum_updated))
 777                         return -EOPNOTSUPP;
 778         } else if (is_tcf_csum(a)) {
 779                 /* csum action requests recalc of something we have not fixed */
 780                 if (tcf_csum_update_flags(a) & ~*csum_updated)
 781                         return -EOPNOTSUPP;
 782                 /* If we will correctly fix the csum we can remove it from the
 783                  * csum update list. Which will later be used to check support.
 784                  */
 785                 *csum_updated &= ~tcf_csum_update_flags(a);
 786         } else {
 787                 /* Currently we do not handle any other actions. */
 788                 return -EOPNOTSUPP;
 789         }
 790
 791         return 0;
 792 }
 793
 794 int nfp_flower_compile_action(struct nfp_app *app,
 795                               struct tc_cls_flower_offload *flow,
 796                               struct net_device *netdev,
 797                               struct nfp_fl_payload *nfp_flow)
 798 {
 799         int act_len, act_cnt, err, tun_out_cnt, out_cnt, i;
 800         enum nfp_flower_tun_type tun_type;
 801         const struct tc_action *a;
 802         u32 csum_updated = 0;
 803
 804         memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
 805         nfp_flow->meta.act_len = 0;
 806         tun_type = NFP_FL_TUNNEL_NONE;
 807         act_len = 0;
 808         act_cnt = 0;
 809         tun_out_cnt = 0;
 810         out_cnt = 0;
 811
 812         tcf_exts_for_each_action(i, a, flow->exts) {
 813                 err = nfp_flower_loop_action(app, a, flow, nfp_flow, &act_len,
 814                                              netdev, &tun_type, &tun_out_cnt,
 815                                              &out_cnt, &csum_updated);
 816                 if (err)
 817                         return err;
 818                 act_cnt++;
 819         }
 820
 821         /* We optimise when the action list is small, this can unfortunately
 822          * not happen once we have more than one action in the action list.
 823          */
 824         if (act_cnt > 1)
 825                 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 826
 827         nfp_flow->meta.act_len = act_len;
 828
 829         return 0;
 830 }