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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #include <linux/bitfield.h>
   5 #include <linux/mpls.h>
   6 #include <net/pkt_cls.h>
   7 #include <net/tc_act/tc_csum.h>
   8 #include <net/tc_act/tc_gact.h>
   9 #include <net/tc_act/tc_mirred.h>
  10 #include <net/tc_act/tc_mpls.h>
  11 #include <net/tc_act/tc_pedit.h>
  12 #include <net/tc_act/tc_vlan.h>
  13 #include <net/tc_act/tc_tunnel_key.h>
  14
  15 #include "cmsg.h"
  16 #include "main.h"
  17 #include "../nfp_net_repr.h"
  18
  19 /* The kernel versions of TUNNEL_* are not ABI and therefore vulnerable
  20  * to change. Such changes will break our FW ABI.
  21  */
  22 #define NFP_FL_TUNNEL_CSUM                      cpu_to_be16(0x01)
  23 #define NFP_FL_TUNNEL_KEY                       cpu_to_be16(0x04)
  24 #define NFP_FL_TUNNEL_GENEVE_OPT                cpu_to_be16(0x0800)
  25 #define NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS      (IP_TUNNEL_INFO_TX | \
  26                                                  IP_TUNNEL_INFO_IPV6)
  27 #define NFP_FL_SUPPORTED_UDP_TUN_FLAGS          (NFP_FL_TUNNEL_CSUM | \
  28                                                  NFP_FL_TUNNEL_KEY | \
  29                                                  NFP_FL_TUNNEL_GENEVE_OPT)
  30
  31 static int
  32 nfp_fl_push_mpls(struct nfp_fl_push_mpls *push_mpls,
  33                  const struct flow_action_entry *act,
  34                  struct netlink_ext_ack *extack)
  35 {
  36         size_t act_size = sizeof(struct nfp_fl_push_mpls);
  37         u32 mpls_lse = 0;
  38
  39         push_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_MPLS;
  40         push_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  41
  42         /* BOS is optional in the TC action but required for offload. */
  43         if (act->mpls_push.bos != ACT_MPLS_BOS_NOT_SET) {
  44                 mpls_lse |= act->mpls_push.bos << MPLS_LS_S_SHIFT;
  45         } else {
  46                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: BOS field must explicitly be set for MPLS push");
  47                 return -EOPNOTSUPP;
  48         }
  49
  50         /* Leave MPLS TC as a default value of 0 if not explicitly set. */
  51         if (act->mpls_push.tc != ACT_MPLS_TC_NOT_SET)
  52                 mpls_lse |= act->mpls_push.tc << MPLS_LS_TC_SHIFT;
  53
  54         /* Proto, label and TTL are enforced and verified for MPLS push. */
  55         mpls_lse |= act->mpls_push.label << MPLS_LS_LABEL_SHIFT;
  56         mpls_lse |= act->mpls_push.ttl << MPLS_LS_TTL_SHIFT;
  57         push_mpls->ethtype = act->mpls_push.proto;
  58         push_mpls->lse = cpu_to_be32(mpls_lse);
  59
  60         return 0;
  61 }
  62
  63 static void
  64 nfp_fl_pop_mpls(struct nfp_fl_pop_mpls *pop_mpls,
  65                 const struct flow_action_entry *act)
  66 {
  67         size_t act_size = sizeof(struct nfp_fl_pop_mpls);
  68
  69         pop_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_POP_MPLS;
  70         pop_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  71         pop_mpls->ethtype = act->mpls_pop.proto;
  72 }
  73
  74 static void
  75 nfp_fl_set_mpls(struct nfp_fl_set_mpls *set_mpls,
  76                 const struct flow_action_entry *act)
  77 {
  78         size_t act_size = sizeof(struct nfp_fl_set_mpls);
  79         u32 mpls_lse = 0, mpls_mask = 0;
  80
  81         set_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_SET_MPLS;
  82         set_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ;
  83
  84         if (act->mpls_mangle.label != ACT_MPLS_LABEL_NOT_SET) {
  85                 mpls_lse |= act->mpls_mangle.label << MPLS_LS_LABEL_SHIFT;
  86                 mpls_mask |= MPLS_LS_LABEL_MASK;
  87         }
  88         if (act->mpls_mangle.tc != ACT_MPLS_TC_NOT_SET) {
  89                 mpls_lse |= act->mpls_mangle.tc << MPLS_LS_TC_SHIFT;
  90                 mpls_mask |= MPLS_LS_TC_MASK;
  91         }
  92         if (act->mpls_mangle.bos != ACT_MPLS_BOS_NOT_SET) {
  93                 mpls_lse |= act->mpls_mangle.bos << MPLS_LS_S_SHIFT;
  94                 mpls_mask |= MPLS_LS_S_MASK;
  95         }
  96         if (act->mpls_mangle.ttl) {
  97                 mpls_lse |= act->mpls_mangle.ttl << MPLS_LS_TTL_SHIFT;
  98                 mpls_mask |= MPLS_LS_TTL_MASK;
  99         }
 100
 101         set_mpls->lse = cpu_to_be32(mpls_lse);
 102         set_mpls->lse_mask = cpu_to_be32(mpls_mask);
 103 }
 104
 105 static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
 106 {
 107         size_t act_size = sizeof(struct nfp_fl_pop_vlan);
 108
 109         pop_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_POP_VLAN;
 110         pop_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 111         pop_vlan->reserved = 0;
 112 }
 113
 114 static void
 115 nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
 116                  const struct flow_action_entry *act)
 117 {
 118         size_t act_size = sizeof(struct nfp_fl_push_vlan);
 119         u16 tmp_push_vlan_tci;
 120
 121         push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN;
 122         push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 123         push_vlan->reserved = 0;
 124         push_vlan->vlan_tpid = act->vlan.proto;
 125
 126         tmp_push_vlan_tci =
 127                 FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, act->vlan.prio) |
 128                 FIELD_PREP(NFP_FL_PUSH_VLAN_VID, act->vlan.vid);
 129         push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
 130 }
 131
 132 static int
 133 nfp_fl_pre_lag(struct nfp_app *app, const struct flow_action_entry *act,
 134                struct nfp_fl_payload *nfp_flow, int act_len,
 135                struct netlink_ext_ack *extack)
 136 {
 137         size_t act_size = sizeof(struct nfp_fl_pre_lag);
 138         struct nfp_fl_pre_lag *pre_lag;
 139         struct net_device *out_dev;
 140         int err;
 141
 142         out_dev = act->dev;
 143         if (!out_dev || !netif_is_lag_master(out_dev))
 144                 return 0;
 145
 146         if (act_len + act_size > NFP_FL_MAX_A_SIZ) {
 147                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at LAG action");
 148                 return -EOPNOTSUPP;
 149         }
 150
 151         /* Pre_lag action must be first on action list.
 152          * If other actions already exist they need pushed forward.
 153          */
 154         if (act_len)
 155                 memmove(nfp_flow->action_data + act_size,
 156                         nfp_flow->action_data, act_len);
 157
 158         pre_lag = (struct nfp_fl_pre_lag *)nfp_flow->action_data;
 159         err = nfp_flower_lag_populate_pre_action(app, out_dev, pre_lag, extack);
 160         if (err)
 161                 return err;
 162
 163         pre_lag->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_LAG;
 164         pre_lag->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 165
 166         nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 167
 168         return act_size;
 169 }
 170
 171 static int
 172 nfp_fl_output(struct nfp_app *app, struct nfp_fl_output *output,
 173               const struct flow_action_entry *act,
 174               struct nfp_fl_payload *nfp_flow,
 175               bool last, struct net_device *in_dev,
 176               enum nfp_flower_tun_type tun_type, int *tun_out_cnt,
 177               bool pkt_host, struct netlink_ext_ack *extack)
 178 {
 179         size_t act_size = sizeof(struct nfp_fl_output);
 180         struct nfp_flower_priv *priv = app->priv;
 181         struct net_device *out_dev;
 182         u16 tmp_flags;
 183
 184         output->head.jump_id = NFP_FL_ACTION_OPCODE_OUTPUT;
 185         output->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 186
 187         out_dev = act->dev;
 188         if (!out_dev) {
 189                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid egress interface for mirred action");
 190                 return -EOPNOTSUPP;
 191         }
 192
 193         tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0;
 194
 195         if (tun_type) {
 196                 /* Verify the egress netdev matches the tunnel type. */
 197                 if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type)) {
 198                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: egress interface does not match the required tunnel type");
 199                         return -EOPNOTSUPP;
 200                 }
 201
 202                 if (*tun_out_cnt) {
 203                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot offload more than one tunnel mirred output per filter");
 204                         return -EOPNOTSUPP;
 205                 }
 206                 (*tun_out_cnt)++;
 207
 208                 output->flags = cpu_to_be16(tmp_flags |
 209                                             NFP_FL_OUT_FLAGS_USE_TUN);
 210                 output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
 211         } else if (netif_is_lag_master(out_dev) &&
 212                    priv->flower_en_feats & NFP_FL_ENABLE_LAG) {
 213                 int gid;
 214
 215                 output->flags = cpu_to_be16(tmp_flags);
 216                 gid = nfp_flower_lag_get_output_id(app, out_dev);
 217                 if (gid < 0) {
 218                         NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot find group id for LAG action");
 219                         return gid;
 220                 }
 221                 output->port = cpu_to_be32(NFP_FL_LAG_OUT | gid);
 222         } else if (nfp_flower_internal_port_can_offload(app, out_dev)) {
 223                 if (!(priv->flower_ext_feats & NFP_FL_FEATS_PRE_TUN_RULES)) {
 224                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules not supported in loaded firmware");
 225                         return -EOPNOTSUPP;
 226                 }
 227
 228                 if (nfp_flow->pre_tun_rule.dev || !pkt_host) {
 229                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pre-tunnel rules require single egress dev and ptype HOST action");
 230                         return -EOPNOTSUPP;
 231                 }
 232
 233                 nfp_flow->pre_tun_rule.dev = out_dev;
 234
 235                 return 0;
 236         } else {
 237                 /* Set action output parameters. */
 238                 output->flags = cpu_to_be16(tmp_flags);
 239
 240                 if (nfp_netdev_is_nfp_repr(in_dev)) {
 241                         /* Confirm ingress and egress are on same device. */
 242                         if (!netdev_port_same_parent_id(in_dev, out_dev)) {
 243                                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ingress and egress interfaces are on different devices");
 244                                 return -EOPNOTSUPP;
 245                         }
 246                 }
 247
 248                 if (!nfp_netdev_is_nfp_repr(out_dev)) {
 249                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: egress interface is not an nfp port");
 250                         return -EOPNOTSUPP;
 251                 }
 252
 253                 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
 254                 if (!output->port) {
 255                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid port id for egress interface");
 256                         return -EOPNOTSUPP;
 257                 }
 258         }
 259         nfp_flow->meta.shortcut = output->port;
 260
 261         return 0;
 262 }
 263
 264 static bool
 265 nfp_flower_tun_is_gre(struct flow_cls_offload *flow, int start_idx)
 266 {
 267         struct flow_action_entry *act = flow->rule->action.entries;
 268         int num_act = flow->rule->action.num_entries;
 269         int act_idx;
 270
 271         /* Preparse action list for next mirred or redirect action */
 272         for (act_idx = start_idx + 1; act_idx < num_act; act_idx++)
 273                 if (act[act_idx].id == FLOW_ACTION_REDIRECT ||
 274                     act[act_idx].id == FLOW_ACTION_MIRRED)
 275                         return netif_is_gretap(act[act_idx].dev);
 276
 277         return false;
 278 }
 279
 280 static enum nfp_flower_tun_type
 281 nfp_fl_get_tun_from_act(struct nfp_app *app,
 282                         struct flow_cls_offload *flow,
 283                         const struct flow_action_entry *act, int act_idx)
 284 {
 285         const struct ip_tunnel_info *tun = act->tunnel;
 286         struct nfp_flower_priv *priv = app->priv;
 287
 288         /* Determine the tunnel type based on the egress netdev
 289          * in the mirred action for tunnels without l4.
 290          */
 291         if (nfp_flower_tun_is_gre(flow, act_idx))
 292                 return NFP_FL_TUNNEL_GRE;
 293
 294         switch (tun->key.tp_dst) {
 295         case htons(IANA_VXLAN_UDP_PORT):
 296                 return NFP_FL_TUNNEL_VXLAN;
 297         case htons(GENEVE_UDP_PORT):
 298                 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
 299                         return NFP_FL_TUNNEL_GENEVE;
 300                 fallthrough;
 301         default:
 302                 return NFP_FL_TUNNEL_NONE;
 303         }
 304 }
 305
 306 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
 307 {
 308         size_t act_size = sizeof(struct nfp_fl_pre_tunnel);
 309         struct nfp_fl_pre_tunnel *pre_tun_act;
 310
 311         /* Pre_tunnel action must be first on action list.
 312          * If other actions already exist they need to be pushed forward.
 313          */
 314         if (act_len)
 315                 memmove(act_data + act_size, act_data, act_len);
 316
 317         pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data;
 318
 319         memset(pre_tun_act, 0, act_size);
 320
 321         pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL;
 322         pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 323
 324         return pre_tun_act;
 325 }
 326
 327 static int
 328 nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len,
 329                            const struct flow_action_entry *act,
 330                            struct netlink_ext_ack *extack)
 331 {
 332         struct ip_tunnel_info *ip_tun = (struct ip_tunnel_info *)act->tunnel;
 333         int opt_len, opt_cnt, act_start, tot_push_len;
 334         u8 *src = ip_tunnel_info_opts(ip_tun);
 335
 336         /* We need to populate the options in reverse order for HW.
 337          * Therefore we go through the options, calculating the
 338          * number of options and the total size, then we populate
 339          * them in reverse order in the action list.
 340          */
 341         opt_cnt = 0;
 342         tot_push_len = 0;
 343         opt_len = ip_tun->options_len;
 344         while (opt_len > 0) {
 345                 struct geneve_opt *opt = (struct geneve_opt *)src;
 346
 347                 opt_cnt++;
 348                 if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT) {
 349                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed number of geneve options exceeded");
 350                         return -EOPNOTSUPP;
 351                 }
 352
 353                 tot_push_len += sizeof(struct nfp_fl_push_geneve) +
 354                                opt->length * 4;
 355                 if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT) {
 356                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options");
 357                         return -EOPNOTSUPP;
 358                 }
 359
 360                 opt_len -= sizeof(struct geneve_opt) + opt->length * 4;
 361                 src += sizeof(struct geneve_opt) + opt->length * 4;
 362         }
 363
 364         if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ) {
 365                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push geneve options");
 366                 return -EOPNOTSUPP;
 367         }
 368
 369         act_start = *list_len;
 370         *list_len += tot_push_len;
 371         src = ip_tunnel_info_opts(ip_tun);
 372         while (opt_cnt) {
 373                 struct geneve_opt *opt = (struct geneve_opt *)src;
 374                 struct nfp_fl_push_geneve *push;
 375                 size_t act_size, len;
 376
 377                 opt_cnt--;
 378                 act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4;
 379                 tot_push_len -= act_size;
 380                 len = act_start + tot_push_len;
 381
 382                 push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len];
 383                 push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE;
 384                 push->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 385                 push->reserved = 0;
 386                 push->class = opt->opt_class;
 387                 push->type = opt->type;
 388                 push->length = opt->length;
 389                 memcpy(&push->opt_data, opt->opt_data, opt->length * 4);
 390
 391                 src += sizeof(struct geneve_opt) + opt->length * 4;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int
 398 nfp_fl_set_tun(struct nfp_app *app, struct nfp_fl_set_tun *set_tun,
 399                const struct flow_action_entry *act,
 400                struct nfp_fl_pre_tunnel *pre_tun,
 401                enum nfp_flower_tun_type tun_type,
 402                struct net_device *netdev, struct netlink_ext_ack *extack)
 403 {
 404         const struct ip_tunnel_info *ip_tun = act->tunnel;
 405         bool ipv6 = ip_tunnel_info_af(ip_tun) == AF_INET6;
 406         size_t act_size = sizeof(struct nfp_fl_set_tun);
 407         struct nfp_flower_priv *priv = app->priv;
 408         u32 tmp_set_ip_tun_type_index = 0;
 409         /* Currently support one pre-tunnel so index is always 0. */
 410         int pretun_idx = 0;
 411
 412         if (!IS_ENABLED(CONFIG_IPV6) && ipv6)
 413                 return -EOPNOTSUPP;
 414
 415         if (ipv6 && !(priv->flower_ext_feats & NFP_FL_FEATS_IPV6_TUN))
 416                 return -EOPNOTSUPP;
 417
 418         BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM ||
 419                      NFP_FL_TUNNEL_KEY  != TUNNEL_KEY ||
 420                      NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT);
 421         if (ip_tun->options_len &&
 422             (tun_type != NFP_FL_TUNNEL_GENEVE ||
 423             !(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT))) {
 424                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve options offload");
 425                 return -EOPNOTSUPP;
 426         }
 427
 428         set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_TUNNEL;
 429         set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 430
 431         /* Set tunnel type and pre-tunnel index. */
 432         tmp_set_ip_tun_type_index |=
 433                 FIELD_PREP(NFP_FL_TUNNEL_TYPE, tun_type) |
 434                 FIELD_PREP(NFP_FL_PRE_TUN_INDEX, pretun_idx);
 435
 436         set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index);
 437         set_tun->tun_id = ip_tun->key.tun_id;
 438
 439         if (ip_tun->key.ttl) {
 440                 set_tun->ttl = ip_tun->key.ttl;
 441 #ifdef CONFIG_IPV6
 442         } else if (ipv6) {
 443                 struct net *net = dev_net(netdev);
 444                 struct flowi6 flow = {};
 445                 struct dst_entry *dst;
 446
 447                 flow.daddr = ip_tun->key.u.ipv6.dst;
 448                 flow.flowi4_proto = IPPROTO_UDP;
 449                 dst = ipv6_stub->ipv6_dst_lookup_flow(net, NULL, &flow, NULL);
 450                 if (!IS_ERR(dst)) {
 451                         set_tun->ttl = ip6_dst_hoplimit(dst);
 452                         dst_release(dst);
 453                 } else {
 454                         set_tun->ttl = net->ipv6.devconf_all->hop_limit;
 455                 }
 456 #endif
 457         } else {
 458                 struct net *net = dev_net(netdev);
 459                 struct flowi4 flow = {};
 460                 struct rtable *rt;
 461                 int err;
 462
 463                 /* Do a route lookup to determine ttl - if fails then use
 464                  * default. Note that CONFIG_INET is a requirement of
 465                  * CONFIG_NET_SWITCHDEV so must be defined here.
 466                  */
 467                 flow.daddr = ip_tun->key.u.ipv4.dst;
 468                 flow.flowi4_proto = IPPROTO_UDP;
 469                 rt = ip_route_output_key(net, &flow);
 470                 err = PTR_ERR_OR_ZERO(rt);
 471                 if (!err) {
 472                         set_tun->ttl = ip4_dst_hoplimit(&rt->dst);
 473                         ip_rt_put(rt);
 474                 } else {
 475                         set_tun->ttl = net->ipv4.sysctl_ip_default_ttl;
 476                 }
 477         }
 478
 479         set_tun->tos = ip_tun->key.tos;
 480
 481         if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) ||
 482             ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_UDP_TUN_FLAGS) {
 483                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support tunnel flag offload");
 484                 return -EOPNOTSUPP;
 485         }
 486         set_tun->tun_flags = ip_tun->key.tun_flags;
 487
 488         if (tun_type == NFP_FL_TUNNEL_GENEVE) {
 489                 set_tun->tun_proto = htons(ETH_P_TEB);
 490                 set_tun->tun_len = ip_tun->options_len / 4;
 491         }
 492
 493         /* Complete pre_tunnel action. */
 494         if (ipv6) {
 495                 pre_tun->flags |= cpu_to_be16(NFP_FL_PRE_TUN_IPV6);
 496                 pre_tun->ipv6_dst = ip_tun->key.u.ipv6.dst;
 497         } else {
 498                 pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
 505 {
 506         u32 oldvalue = get_unaligned((u32 *)p_exact);
 507         u32 oldmask = get_unaligned((u32 *)p_mask);
 508
 509         value &= mask;
 510         value |= oldvalue & ~mask;
 511
 512         put_unaligned(oldmask | mask, (u32 *)p_mask);
 513         put_unaligned(value, (u32 *)p_exact);
 514 }
 515
 516 static int
 517 nfp_fl_set_eth(const struct flow_action_entry *act, u32 off,
 518                struct nfp_fl_set_eth *set_eth, struct netlink_ext_ack *extack)
 519 {
 520         u32 exact, mask;
 521
 522         if (off + 4 > ETH_ALEN * 2) {
 523                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action");
 524                 return -EOPNOTSUPP;
 525         }
 526
 527         mask = ~act->mangle.mask;
 528         exact = act->mangle.val;
 529
 530         if (exact & ~mask) {
 531                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action");
 532                 return -EOPNOTSUPP;
 533         }
 534
 535         nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off],
 536                             &set_eth->eth_addr_mask[off]);
 537
 538         set_eth->reserved = cpu_to_be16(0);
 539         set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET;
 540         set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ;
 541
 542         return 0;
 543 }
 544
 545 struct ipv4_ttl_word {
 546         __u8    ttl;
 547         __u8    protocol;
 548         __sum16 check;
 549 };
 550
 551 static int
 552 nfp_fl_set_ip4(const struct flow_action_entry *act, u32 off,
 553                struct nfp_fl_set_ip4_addrs *set_ip_addr,
 554                struct nfp_fl_set_ip4_ttl_tos *set_ip_ttl_tos,
 555                struct netlink_ext_ack *extack)
 556 {
 557         struct ipv4_ttl_word *ttl_word_mask;
 558         struct ipv4_ttl_word *ttl_word;
 559         struct iphdr *tos_word_mask;
 560         struct iphdr *tos_word;
 561         __be32 exact, mask;
 562
 563         /* We are expecting tcf_pedit to return a big endian value */
 564         mask = (__force __be32)~act->mangle.mask;
 565         exact = (__force __be32)act->mangle.val;
 566
 567         if (exact & ~mask) {
 568                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 action");
 569                 return -EOPNOTSUPP;
 570         }
 571
 572         switch (off) {
 573         case offsetof(struct iphdr, daddr):
 574                 set_ip_addr->ipv4_dst_mask |= mask;
 575                 set_ip_addr->ipv4_dst &= ~mask;
 576                 set_ip_addr->ipv4_dst |= exact & mask;
 577                 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS;
 578                 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >>
 579                                            NFP_FL_LW_SIZ;
 580                 break;
 581         case offsetof(struct iphdr, saddr):
 582                 set_ip_addr->ipv4_src_mask |= mask;
 583                 set_ip_addr->ipv4_src &= ~mask;
 584                 set_ip_addr->ipv4_src |= exact & mask;
 585                 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS;
 586                 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >>
 587                                            NFP_FL_LW_SIZ;
 588                 break;
 589         case offsetof(struct iphdr, ttl):
 590                 ttl_word_mask = (struct ipv4_ttl_word *)&mask;
 591                 ttl_word = (struct ipv4_ttl_word *)&exact;
 592
 593                 if (ttl_word_mask->protocol || ttl_word_mask->check) {
 594                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 ttl action");
 595                         return -EOPNOTSUPP;
 596                 }
 597
 598                 set_ip_ttl_tos->ipv4_ttl_mask |= ttl_word_mask->ttl;
 599                 set_ip_ttl_tos->ipv4_ttl &= ~ttl_word_mask->ttl;
 600                 set_ip_ttl_tos->ipv4_ttl |= ttl_word->ttl & ttl_word_mask->ttl;
 601                 set_ip_ttl_tos->head.jump_id =
 602                         NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS;
 603                 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >>
 604                                               NFP_FL_LW_SIZ;
 605                 break;
 606         case round_down(offsetof(struct iphdr, tos), 4):
 607                 tos_word_mask = (struct iphdr *)&mask;
 608                 tos_word = (struct iphdr *)&exact;
 609
 610                 if (tos_word_mask->version || tos_word_mask->ihl ||
 611                     tos_word_mask->tot_len) {
 612                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 tos action");
 613                         return -EOPNOTSUPP;
 614                 }
 615
 616                 set_ip_ttl_tos->ipv4_tos_mask |= tos_word_mask->tos;
 617                 set_ip_ttl_tos->ipv4_tos &= ~tos_word_mask->tos;
 618                 set_ip_ttl_tos->ipv4_tos |= tos_word->tos & tos_word_mask->tos;
 619                 set_ip_ttl_tos->head.jump_id =
 620                         NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS;
 621                 set_ip_ttl_tos->head.len_lw = sizeof(*set_ip_ttl_tos) >>
 622                                               NFP_FL_LW_SIZ;
 623                 break;
 624         default:
 625                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv4 header");
 626                 return -EOPNOTSUPP;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static void
 633 nfp_fl_set_ip6_helper(int opcode_tag, u8 word, __be32 exact, __be32 mask,
 634                       struct nfp_fl_set_ipv6_addr *ip6)
 635 {
 636         ip6->ipv6[word].mask |= mask;
 637         ip6->ipv6[word].exact &= ~mask;
 638         ip6->ipv6[word].exact |= exact & mask;
 639
 640         ip6->reserved = cpu_to_be16(0);
 641         ip6->head.jump_id = opcode_tag;
 642         ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ;
 643 }
 644
 645 struct ipv6_hop_limit_word {
 646         __be16 payload_len;
 647         u8 nexthdr;
 648         u8 hop_limit;
 649 };
 650
 651 static int
 652 nfp_fl_set_ip6_hop_limit_flow_label(u32 off, __be32 exact, __be32 mask,
 653                                     struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl,
 654                                     struct netlink_ext_ack *extack)
 655 {
 656         struct ipv6_hop_limit_word *fl_hl_mask;
 657         struct ipv6_hop_limit_word *fl_hl;
 658
 659         switch (off) {
 660         case offsetof(struct ipv6hdr, payload_len):
 661                 fl_hl_mask = (struct ipv6_hop_limit_word *)&mask;
 662                 fl_hl = (struct ipv6_hop_limit_word *)&exact;
 663
 664                 if (fl_hl_mask->nexthdr || fl_hl_mask->payload_len) {
 665                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 hop limit action");
 666                         return -EOPNOTSUPP;
 667                 }
 668
 669                 ip_hl_fl->ipv6_hop_limit_mask |= fl_hl_mask->hop_limit;
 670                 ip_hl_fl->ipv6_hop_limit &= ~fl_hl_mask->hop_limit;
 671                 ip_hl_fl->ipv6_hop_limit |= fl_hl->hop_limit &
 672                                             fl_hl_mask->hop_limit;
 673                 break;
 674         case round_down(offsetof(struct ipv6hdr, flow_lbl), 4):
 675                 if (mask & ~IPV6_FLOW_LABEL_MASK ||
 676                     exact & ~IPV6_FLOW_LABEL_MASK) {
 677                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 flow label action");
 678                         return -EOPNOTSUPP;
 679                 }
 680
 681                 ip_hl_fl->ipv6_label_mask |= mask;
 682                 ip_hl_fl->ipv6_label &= ~mask;
 683                 ip_hl_fl->ipv6_label |= exact & mask;
 684                 break;
 685         }
 686
 687         ip_hl_fl->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV6_TC_HL_FL;
 688         ip_hl_fl->head.len_lw = sizeof(*ip_hl_fl) >> NFP_FL_LW_SIZ;
 689
 690         return 0;
 691 }
 692
 693 static int
 694 nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off,
 695                struct nfp_fl_set_ipv6_addr *ip_dst,
 696                struct nfp_fl_set_ipv6_addr *ip_src,
 697                struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl,
 698                struct netlink_ext_ack *extack)
 699 {
 700         __be32 exact, mask;
 701         int err = 0;
 702         u8 word;
 703
 704         /* We are expecting tcf_pedit to return a big endian value */
 705         mask = (__force __be32)~act->mangle.mask;
 706         exact = (__force __be32)act->mangle.val;
 707
 708         if (exact & ~mask) {
 709                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 action");
 710                 return -EOPNOTSUPP;
 711         }
 712
 713         if (off < offsetof(struct ipv6hdr, saddr)) {
 714                 err = nfp_fl_set_ip6_hop_limit_flow_label(off, exact, mask,
 715                                                           ip_hl_fl, extack);
 716         } else if (off < offsetof(struct ipv6hdr, daddr)) {
 717                 word = (off - offsetof(struct ipv6hdr, saddr)) / sizeof(exact);
 718                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, word,
 719                                       exact, mask, ip_src);
 720         } else if (off < offsetof(struct ipv6hdr, daddr) +
 721                        sizeof(struct in6_addr)) {
 722                 word = (off - offsetof(struct ipv6hdr, daddr)) / sizeof(exact);
 723                 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, word,
 724                                       exact, mask, ip_dst);
 725         } else {
 726                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of IPv6 header");
 727                 return -EOPNOTSUPP;
 728         }
 729
 730         return err;
 731 }
 732
 733 static int
 734 nfp_fl_set_tport(const struct flow_action_entry *act, u32 off,
 735                  struct nfp_fl_set_tport *set_tport, int opcode,
 736                  struct netlink_ext_ack *extack)
 737 {
 738         u32 exact, mask;
 739
 740         if (off) {
 741                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported section of L4 header");
 742                 return -EOPNOTSUPP;
 743         }
 744
 745         mask = ~act->mangle.mask;
 746         exact = act->mangle.val;
 747
 748         if (exact & ~mask) {
 749                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit L4 action");
 750                 return -EOPNOTSUPP;
 751         }
 752
 753         nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val,
 754                             set_tport->tp_port_mask);
 755
 756         set_tport->reserved = cpu_to_be16(0);
 757         set_tport->head.jump_id = opcode;
 758         set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ;
 759
 760         return 0;
 761 }
 762
 763 static u32 nfp_fl_csum_l4_to_flag(u8 ip_proto)
 764 {
 765         switch (ip_proto) {
 766         case 0:
 767                 /* Filter doesn't force proto match,
 768                  * both TCP and UDP will be updated if encountered
 769                  */
 770                 return TCA_CSUM_UPDATE_FLAG_TCP | TCA_CSUM_UPDATE_FLAG_UDP;
 771         case IPPROTO_TCP:
 772                 return TCA_CSUM_UPDATE_FLAG_TCP;
 773         case IPPROTO_UDP:
 774                 return TCA_CSUM_UPDATE_FLAG_UDP;
 775         default:
 776                 /* All other protocols will be ignored by FW */
 777                 return 0;
 778         }
 779 }
 780
 781 struct nfp_flower_pedit_acts {
 782         struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src;
 783         struct nfp_fl_set_ipv6_tc_hl_fl set_ip6_tc_hl_fl;
 784         struct nfp_fl_set_ip4_ttl_tos set_ip_ttl_tos;
 785         struct nfp_fl_set_ip4_addrs set_ip_addr;
 786         struct nfp_fl_set_tport set_tport;
 787         struct nfp_fl_set_eth set_eth;
 788 };
 789
 790 static int
 791 nfp_fl_commit_mangle(struct flow_cls_offload *flow, char *nfp_action,
 792                      int *a_len, struct nfp_flower_pedit_acts *set_act,
 793                      u32 *csum_updated)
 794 {
 795         struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
 796         size_t act_size = 0;
 797         u8 ip_proto = 0;
 798
 799         if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
 800                 struct flow_match_basic match;
 801
 802                 flow_rule_match_basic(rule, &match);
 803                 ip_proto = match.key->ip_proto;
 804         }
 805
 806         if (set_act->set_eth.head.len_lw) {
 807                 act_size = sizeof(set_act->set_eth);
 808                 memcpy(nfp_action, &set_act->set_eth, act_size);
 809                 *a_len += act_size;
 810         }
 811
 812         if (set_act->set_ip_ttl_tos.head.len_lw) {
 813                 nfp_action += act_size;
 814                 act_size = sizeof(set_act->set_ip_ttl_tos);
 815                 memcpy(nfp_action, &set_act->set_ip_ttl_tos, act_size);
 816                 *a_len += act_size;
 817
 818                 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */
 819                 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR |
 820                                 nfp_fl_csum_l4_to_flag(ip_proto);
 821         }
 822
 823         if (set_act->set_ip_addr.head.len_lw) {
 824                 nfp_action += act_size;
 825                 act_size = sizeof(set_act->set_ip_addr);
 826                 memcpy(nfp_action, &set_act->set_ip_addr, act_size);
 827                 *a_len += act_size;
 828
 829                 /* Hardware will automatically fix IPv4 and TCP/UDP checksum. */
 830                 *csum_updated |= TCA_CSUM_UPDATE_FLAG_IPV4HDR |
 831                                 nfp_fl_csum_l4_to_flag(ip_proto);
 832         }
 833
 834         if (set_act->set_ip6_tc_hl_fl.head.len_lw) {
 835                 nfp_action += act_size;
 836                 act_size = sizeof(set_act->set_ip6_tc_hl_fl);
 837                 memcpy(nfp_action, &set_act->set_ip6_tc_hl_fl, act_size);
 838                 *a_len += act_size;
 839
 840                 /* Hardware will automatically fix TCP/UDP checksum. */
 841                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 842         }
 843
 844         if (set_act->set_ip6_dst.head.len_lw &&
 845             set_act->set_ip6_src.head.len_lw) {
 846                 /* TC compiles set src and dst IPv6 address as a single action,
 847                  * the hardware requires this to be 2 separate actions.
 848                  */
 849                 nfp_action += act_size;
 850                 act_size = sizeof(set_act->set_ip6_src);
 851                 memcpy(nfp_action, &set_act->set_ip6_src, act_size);
 852                 *a_len += act_size;
 853
 854                 act_size = sizeof(set_act->set_ip6_dst);
 855                 memcpy(&nfp_action[sizeof(set_act->set_ip6_src)],
 856                        &set_act->set_ip6_dst, act_size);
 857                 *a_len += act_size;
 858
 859                 /* Hardware will automatically fix TCP/UDP checksum. */
 860                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 861         } else if (set_act->set_ip6_dst.head.len_lw) {
 862                 nfp_action += act_size;
 863                 act_size = sizeof(set_act->set_ip6_dst);
 864                 memcpy(nfp_action, &set_act->set_ip6_dst, act_size);
 865                 *a_len += act_size;
 866
 867                 /* Hardware will automatically fix TCP/UDP checksum. */
 868                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 869         } else if (set_act->set_ip6_src.head.len_lw) {
 870                 nfp_action += act_size;
 871                 act_size = sizeof(set_act->set_ip6_src);
 872                 memcpy(nfp_action, &set_act->set_ip6_src, act_size);
 873                 *a_len += act_size;
 874
 875                 /* Hardware will automatically fix TCP/UDP checksum. */
 876                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 877         }
 878         if (set_act->set_tport.head.len_lw) {
 879                 nfp_action += act_size;
 880                 act_size = sizeof(set_act->set_tport);
 881                 memcpy(nfp_action, &set_act->set_tport, act_size);
 882                 *a_len += act_size;
 883
 884                 /* Hardware will automatically fix TCP/UDP checksum. */
 885                 *csum_updated |= nfp_fl_csum_l4_to_flag(ip_proto);
 886         }
 887
 888         return 0;
 889 }
 890
 891 static int
 892 nfp_fl_pedit(const struct flow_action_entry *act,
 893              struct flow_cls_offload *flow, char *nfp_action, int *a_len,
 894              u32 *csum_updated, struct nfp_flower_pedit_acts *set_act,
 895              struct netlink_ext_ack *extack)
 896 {
 897         enum flow_action_mangle_base htype;
 898         u32 offset;
 899
 900         htype = act->mangle.htype;
 901         offset = act->mangle.offset;
 902
 903         switch (htype) {
 904         case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
 905                 return nfp_fl_set_eth(act, offset, &set_act->set_eth, extack);
 906         case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
 907                 return nfp_fl_set_ip4(act, offset, &set_act->set_ip_addr,
 908                                       &set_act->set_ip_ttl_tos, extack);
 909         case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
 910                 return nfp_fl_set_ip6(act, offset, &set_act->set_ip6_dst,
 911                                       &set_act->set_ip6_src,
 912                                       &set_act->set_ip6_tc_hl_fl, extack);
 913         case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
 914                 return nfp_fl_set_tport(act, offset, &set_act->set_tport,
 915                                         NFP_FL_ACTION_OPCODE_SET_TCP, extack);
 916         case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
 917                 return nfp_fl_set_tport(act, offset, &set_act->set_tport,
 918                                         NFP_FL_ACTION_OPCODE_SET_UDP, extack);
 919         default:
 920                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported header");
 921                 return -EOPNOTSUPP;
 922         }
 923 }
 924
 925 static int
 926 nfp_flower_output_action(struct nfp_app *app,
 927                          const struct flow_action_entry *act,
 928                          struct nfp_fl_payload *nfp_fl, int *a_len,
 929                          struct net_device *netdev, bool last,
 930                          enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 931                          int *out_cnt, u32 *csum_updated, bool pkt_host,
 932                          struct netlink_ext_ack *extack)
 933 {
 934         struct nfp_flower_priv *priv = app->priv;
 935         struct nfp_fl_output *output;
 936         int err, prelag_size;
 937
 938         /* If csum_updated has not been reset by now, it means HW will
 939          * incorrectly update csums when they are not requested.
 940          */
 941         if (*csum_updated) {
 942                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: set actions without updating checksums are not supported");
 943                 return -EOPNOTSUPP;
 944         }
 945
 946         if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ) {
 947                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: mirred output increases action list size beyond the allowed maximum");
 948                 return -EOPNOTSUPP;
 949         }
 950
 951         output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
 952         err = nfp_fl_output(app, output, act, nfp_fl, last, netdev, *tun_type,
 953                             tun_out_cnt, pkt_host, extack);
 954         if (err)
 955                 return err;
 956
 957         *a_len += sizeof(struct nfp_fl_output);
 958
 959         if (priv->flower_en_feats & NFP_FL_ENABLE_LAG) {
 960                 /* nfp_fl_pre_lag returns -err or size of prelag action added.
 961                  * This will be 0 if it is not egressing to a lag dev.
 962                  */
 963                 prelag_size = nfp_fl_pre_lag(app, act, nfp_fl, *a_len, extack);
 964                 if (prelag_size < 0) {
 965                         return prelag_size;
 966                 } else if (prelag_size > 0 && (!last || *out_cnt)) {
 967                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: LAG action has to be last action in action list");
 968                         return -EOPNOTSUPP;
 969                 }
 970
 971                 *a_len += prelag_size;
 972         }
 973         (*out_cnt)++;
 974
 975         return 0;
 976 }
 977
 978 static int
 979 nfp_flower_loop_action(struct nfp_app *app, const struct flow_action_entry *act,
 980                        struct flow_cls_offload *flow,
 981                        struct nfp_fl_payload *nfp_fl, int *a_len,
 982                        struct net_device *netdev,
 983                        enum nfp_flower_tun_type *tun_type, int *tun_out_cnt,
 984                        int *out_cnt, u32 *csum_updated,
 985                        struct nfp_flower_pedit_acts *set_act, bool *pkt_host,
 986                        struct netlink_ext_ack *extack, int act_idx)
 987 {
 988         struct nfp_fl_pre_tunnel *pre_tun;
 989         struct nfp_fl_set_tun *set_tun;
 990         struct nfp_fl_push_vlan *psh_v;
 991         struct nfp_fl_push_mpls *psh_m;
 992         struct nfp_fl_pop_vlan *pop_v;
 993         struct nfp_fl_pop_mpls *pop_m;
 994         struct nfp_fl_set_mpls *set_m;
 995         int err;
 996
 997         switch (act->id) {
 998         case FLOW_ACTION_DROP:
 999                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP);
1000                 break;
1001         case FLOW_ACTION_REDIRECT_INGRESS:
1002         case FLOW_ACTION_REDIRECT:
1003                 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev,
1004                                                true, tun_type, tun_out_cnt,
1005                                                out_cnt, csum_updated, *pkt_host,
1006                                                extack);
1007                 if (err)
1008                         return err;
1009                 break;
1010         case FLOW_ACTION_MIRRED_INGRESS:
1011         case FLOW_ACTION_MIRRED:
1012                 err = nfp_flower_output_action(app, act, nfp_fl, a_len, netdev,
1013                                                false, tun_type, tun_out_cnt,
1014                                                out_cnt, csum_updated, *pkt_host,
1015                                                extack);
1016                 if (err)
1017                         return err;
1018                 break;
1019         case FLOW_ACTION_VLAN_POP:
1020                 if (*a_len +
1021                     sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ) {
1022                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop vlan");
1023                         return -EOPNOTSUPP;
1024                 }
1025
1026                 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len];
1027                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV);
1028
1029                 nfp_fl_pop_vlan(pop_v);
1030                 *a_len += sizeof(struct nfp_fl_pop_vlan);
1031                 break;
1032         case FLOW_ACTION_VLAN_PUSH:
1033                 if (*a_len +
1034                     sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ) {
1035                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push vlan");
1036                         return -EOPNOTSUPP;
1037                 }
1038
1039                 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len];
1040                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1041
1042                 nfp_fl_push_vlan(psh_v, act);
1043                 *a_len += sizeof(struct nfp_fl_push_vlan);
1044                 break;
1045         case FLOW_ACTION_TUNNEL_ENCAP: {
1046                 const struct ip_tunnel_info *ip_tun = act->tunnel;
1047
1048                 *tun_type = nfp_fl_get_tun_from_act(app, flow, act, act_idx);
1049                 if (*tun_type == NFP_FL_TUNNEL_NONE) {
1050                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel type in action list");
1051                         return -EOPNOTSUPP;
1052                 }
1053
1054                 if (ip_tun->mode & ~NFP_FL_SUPPORTED_TUNNEL_INFO_FLAGS) {
1055                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported tunnel flags in action list");
1056                         return -EOPNOTSUPP;
1057                 }
1058
1059                 /* Pre-tunnel action is required for tunnel encap.
1060                  * This checks for next hop entries on NFP.
1061                  * If none, the packet falls back before applying other actions.
1062                  */
1063                 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) +
1064                     sizeof(struct nfp_fl_set_tun) > NFP_FL_MAX_A_SIZ) {
1065                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at tunnel encap");
1066                         return -EOPNOTSUPP;
1067                 }
1068
1069                 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len);
1070                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1071                 *a_len += sizeof(struct nfp_fl_pre_tunnel);
1072
1073                 err = nfp_fl_push_geneve_options(nfp_fl, a_len, act, extack);
1074                 if (err)
1075                         return err;
1076
1077                 set_tun = (void *)&nfp_fl->action_data[*a_len];
1078                 err = nfp_fl_set_tun(app, set_tun, act, pre_tun, *tun_type,
1079                                      netdev, extack);
1080                 if (err)
1081                         return err;
1082                 *a_len += sizeof(struct nfp_fl_set_tun);
1083                 }
1084                 break;
1085         case FLOW_ACTION_TUNNEL_DECAP:
1086                 /* Tunnel decap is handled by default so accept action. */
1087                 return 0;
1088         case FLOW_ACTION_MANGLE:
1089                 if (nfp_fl_pedit(act, flow, &nfp_fl->action_data[*a_len],
1090                                  a_len, csum_updated, set_act, extack))
1091                         return -EOPNOTSUPP;
1092                 break;
1093         case FLOW_ACTION_CSUM:
1094                 /* csum action requests recalc of something we have not fixed */
1095                 if (act->csum_flags & ~*csum_updated) {
1096                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported csum update action in action list");
1097                         return -EOPNOTSUPP;
1098                 }
1099                 /* If we will correctly fix the csum we can remove it from the
1100                  * csum update list. Which will later be used to check support.
1101                  */
1102                 *csum_updated &= ~act->csum_flags;
1103                 break;
1104         case FLOW_ACTION_MPLS_PUSH:
1105                 if (*a_len +
1106                     sizeof(struct nfp_fl_push_mpls) > NFP_FL_MAX_A_SIZ) {
1107                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at push MPLS");
1108                         return -EOPNOTSUPP;
1109                 }
1110
1111                 psh_m = (struct nfp_fl_push_mpls *)&nfp_fl->action_data[*a_len];
1112                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1113
1114                 err = nfp_fl_push_mpls(psh_m, act, extack);
1115                 if (err)
1116                         return err;
1117                 *a_len += sizeof(struct nfp_fl_push_mpls);
1118                 break;
1119         case FLOW_ACTION_MPLS_POP:
1120                 if (*a_len +
1121                     sizeof(struct nfp_fl_pop_mpls) > NFP_FL_MAX_A_SIZ) {
1122                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at pop MPLS");
1123                         return -EOPNOTSUPP;
1124                 }
1125
1126                 pop_m = (struct nfp_fl_pop_mpls *)&nfp_fl->action_data[*a_len];
1127                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1128
1129                 nfp_fl_pop_mpls(pop_m, act);
1130                 *a_len += sizeof(struct nfp_fl_pop_mpls);
1131                 break;
1132         case FLOW_ACTION_MPLS_MANGLE:
1133                 if (*a_len +
1134                     sizeof(struct nfp_fl_set_mpls) > NFP_FL_MAX_A_SIZ) {
1135                         NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at set MPLS");
1136                         return -EOPNOTSUPP;
1137                 }
1138
1139                 set_m = (struct nfp_fl_set_mpls *)&nfp_fl->action_data[*a_len];
1140                 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1141
1142                 nfp_fl_set_mpls(set_m, act);
1143                 *a_len += sizeof(struct nfp_fl_set_mpls);
1144                 break;
1145         case FLOW_ACTION_PTYPE:
1146                 /* TC ptype skbedit sets PACKET_HOST for ingress redirect. */
1147                 if (act->ptype != PACKET_HOST)
1148                         return -EOPNOTSUPP;
1149
1150                 *pkt_host = true;
1151                 break;
1152         default:
1153                 /* Currently we do not handle any other actions. */
1154                 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported action in action list");
1155                 return -EOPNOTSUPP;
1156         }
1157
1158         return 0;
1159 }
1160
1161 static bool nfp_fl_check_mangle_start(struct flow_action *flow_act,
1162                                       int current_act_idx)
1163 {
1164         struct flow_action_entry current_act;
1165         struct flow_action_entry prev_act;
1166
1167         current_act = flow_act->entries[current_act_idx];
1168         if (current_act.id != FLOW_ACTION_MANGLE)
1169                 return false;
1170
1171         if (current_act_idx == 0)
1172                 return true;
1173
1174         prev_act = flow_act->entries[current_act_idx - 1];
1175
1176         return prev_act.id != FLOW_ACTION_MANGLE;
1177 }
1178
1179 static bool nfp_fl_check_mangle_end(struct flow_action *flow_act,
1180                                     int current_act_idx)
1181 {
1182         struct flow_action_entry current_act;
1183         struct flow_action_entry next_act;
1184
1185         current_act = flow_act->entries[current_act_idx];
1186         if (current_act.id != FLOW_ACTION_MANGLE)
1187                 return false;
1188
1189         if (current_act_idx == flow_act->num_entries)
1190                 return true;
1191
1192         next_act = flow_act->entries[current_act_idx + 1];
1193
1194         return next_act.id != FLOW_ACTION_MANGLE;
1195 }
1196
1197 int nfp_flower_compile_action(struct nfp_app *app,
1198                               struct flow_cls_offload *flow,
1199                               struct net_device *netdev,
1200                               struct nfp_fl_payload *nfp_flow,
1201                               struct netlink_ext_ack *extack)
1202 {
1203         int act_len, act_cnt, err, tun_out_cnt, out_cnt, i;
1204         struct nfp_flower_pedit_acts set_act;
1205         enum nfp_flower_tun_type tun_type;
1206         struct flow_action_entry *act;
1207         bool pkt_host = false;
1208         u32 csum_updated = 0;
1209
1210         if (!flow_action_hw_stats_check(&flow->rule->action, extack,
1211                                         FLOW_ACTION_HW_STATS_DELAYED_BIT))
1212                 return -EOPNOTSUPP;
1213
1214         memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
1215         nfp_flow->meta.act_len = 0;
1216         tun_type = NFP_FL_TUNNEL_NONE;
1217         act_len = 0;
1218         act_cnt = 0;
1219         tun_out_cnt = 0;
1220         out_cnt = 0;
1221
1222         flow_action_for_each(i, act, &flow->rule->action) {
1223                 if (nfp_fl_check_mangle_start(&flow->rule->action, i))
1224                         memset(&set_act, 0, sizeof(set_act));
1225                 err = nfp_flower_loop_action(app, act, flow, nfp_flow, &act_len,
1226                                              netdev, &tun_type, &tun_out_cnt,
1227                                              &out_cnt, &csum_updated,
1228                                              &set_act, &pkt_host, extack, i);
1229                 if (err)
1230                         return err;
1231                 act_cnt++;
1232                 if (nfp_fl_check_mangle_end(&flow->rule->action, i))
1233                         nfp_fl_commit_mangle(flow,
1234                                              &nfp_flow->action_data[act_len],
1235                                              &act_len, &set_act, &csum_updated);
1236         }
1237
1238         /* We optimise when the action list is small, this can unfortunately
1239          * not happen once we have more than one action in the action list.
1240          */
1241         if (act_cnt > 1)
1242                 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
1243
1244         nfp_flow->meta.act_len = act_len;
1245
1246         return 0;
1247 }