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/pkt_cls.h> 36 37 #include "cmsg.h" 38 #include "main.h" 39 40 static void 41 nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *frame, 42 struct tc_cls_flower_offload *flow, u8 key_type, 43 bool mask_version) 44 { 45 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 46 struct flow_dissector_key_vlan *flow_vlan; 47 u16 tmp_tci; 48 49 memset(frame, 0, sizeof(struct nfp_flower_meta_tci)); 50 /* Populate the metadata frame. */ 51 frame->nfp_flow_key_layer = key_type; 52 frame->mask_id = ~0; 53 54 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) { 55 flow_vlan = skb_flow_dissector_target(flow->dissector, 56 FLOW_DISSECTOR_KEY_VLAN, 57 target); 58 /* Populate the tci field. */ 59 if (flow_vlan->vlan_id) { 60 tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO, 61 flow_vlan->vlan_priority) | 62 FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID, 63 flow_vlan->vlan_id) | 64 NFP_FLOWER_MASK_VLAN_CFI; 65 frame->tci = cpu_to_be16(tmp_tci); 66 } 67 } 68 } 69 70 static void 71 nfp_flower_compile_ext_meta(struct nfp_flower_ext_meta *frame, u32 key_ext) 72 { 73 frame->nfp_flow_key_layer2 = cpu_to_be32(key_ext); 74 } 75 76 static int 77 nfp_flower_compile_port(struct nfp_flower_in_port *frame, u32 cmsg_port, 78 bool mask_version, enum nfp_flower_tun_type tun_type) 79 { 80 if (mask_version) { 81 frame->in_port = cpu_to_be32(~0); 82 return 0; 83 } 84 85 if (tun_type) 86 frame->in_port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type); 87 else 88 frame->in_port = cpu_to_be32(cmsg_port); 89 90 return 0; 91 } 92 93 static void 94 nfp_flower_compile_mac(struct nfp_flower_mac_mpls *frame, 95 struct tc_cls_flower_offload *flow, 96 bool mask_version) 97 { 98 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 99 struct flow_dissector_key_eth_addrs *addr; 100 101 memset(frame, 0, sizeof(struct nfp_flower_mac_mpls)); 102 103 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 104 addr = skb_flow_dissector_target(flow->dissector, 105 FLOW_DISSECTOR_KEY_ETH_ADDRS, 106 target); 107 /* Populate mac frame. */ 108 ether_addr_copy(frame->mac_dst, &addr->dst[0]); 109 ether_addr_copy(frame->mac_src, &addr->src[0]); 110 } 111 112 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) { 113 struct flow_dissector_key_mpls *mpls; 114 u32 t_mpls; 115 116 mpls = skb_flow_dissector_target(flow->dissector, 117 FLOW_DISSECTOR_KEY_MPLS, 118 target); 119 120 t_mpls = FIELD_PREP(NFP_FLOWER_MASK_MPLS_LB, mpls->mpls_label) | 121 FIELD_PREP(NFP_FLOWER_MASK_MPLS_TC, mpls->mpls_tc) | 122 FIELD_PREP(NFP_FLOWER_MASK_MPLS_BOS, mpls->mpls_bos) | 123 NFP_FLOWER_MASK_MPLS_Q; 124 125 frame->mpls_lse = cpu_to_be32(t_mpls); 126 } 127 } 128 129 static void 130 nfp_flower_compile_tport(struct nfp_flower_tp_ports *frame, 131 struct tc_cls_flower_offload *flow, 132 bool mask_version) 133 { 134 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 135 struct flow_dissector_key_ports *tp; 136 137 memset(frame, 0, sizeof(struct nfp_flower_tp_ports)); 138 139 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_PORTS)) { 140 tp = skb_flow_dissector_target(flow->dissector, 141 FLOW_DISSECTOR_KEY_PORTS, 142 target); 143 frame->port_src = tp->src; 144 frame->port_dst = tp->dst; 145 } 146 } 147 148 static void 149 nfp_flower_compile_ipv4(struct nfp_flower_ipv4 *frame, 150 struct tc_cls_flower_offload *flow, 151 bool mask_version) 152 { 153 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 154 struct flow_dissector_key_ipv4_addrs *addr; 155 struct flow_dissector_key_basic *basic; 156 157 memset(frame, 0, sizeof(struct nfp_flower_ipv4)); 158 159 if (dissector_uses_key(flow->dissector, 160 FLOW_DISSECTOR_KEY_IPV4_ADDRS)) { 161 addr = skb_flow_dissector_target(flow->dissector, 162 FLOW_DISSECTOR_KEY_IPV4_ADDRS, 163 target); 164 frame->ipv4_src = addr->src; 165 frame->ipv4_dst = addr->dst; 166 } 167 168 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 169 basic = skb_flow_dissector_target(flow->dissector, 170 FLOW_DISSECTOR_KEY_BASIC, 171 target); 172 frame->proto = basic->ip_proto; 173 } 174 175 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_IP)) { 176 struct flow_dissector_key_ip *flow_ip; 177 178 flow_ip = skb_flow_dissector_target(flow->dissector, 179 FLOW_DISSECTOR_KEY_IP, 180 target); 181 frame->tos = flow_ip->tos; 182 frame->ttl = flow_ip->ttl; 183 } 184 185 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) { 186 struct flow_dissector_key_tcp *tcp; 187 u32 tcp_flags; 188 189 tcp = skb_flow_dissector_target(flow->dissector, 190 FLOW_DISSECTOR_KEY_TCP, target); 191 tcp_flags = be16_to_cpu(tcp->flags); 192 193 if (tcp_flags & TCPHDR_FIN) 194 frame->flags |= NFP_FL_TCP_FLAG_FIN; 195 if (tcp_flags & TCPHDR_SYN) 196 frame->flags |= NFP_FL_TCP_FLAG_SYN; 197 if (tcp_flags & TCPHDR_RST) 198 frame->flags |= NFP_FL_TCP_FLAG_RST; 199 if (tcp_flags & TCPHDR_PSH) 200 frame->flags |= NFP_FL_TCP_FLAG_PSH; 201 if (tcp_flags & TCPHDR_URG) 202 frame->flags |= NFP_FL_TCP_FLAG_URG; 203 } 204 } 205 206 static void 207 nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame, 208 struct tc_cls_flower_offload *flow, 209 bool mask_version) 210 { 211 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 212 struct flow_dissector_key_ipv6_addrs *addr; 213 struct flow_dissector_key_basic *basic; 214 215 memset(frame, 0, sizeof(struct nfp_flower_ipv6)); 216 217 if (dissector_uses_key(flow->dissector, 218 FLOW_DISSECTOR_KEY_IPV6_ADDRS)) { 219 addr = skb_flow_dissector_target(flow->dissector, 220 FLOW_DISSECTOR_KEY_IPV6_ADDRS, 221 target); 222 frame->ipv6_src = addr->src; 223 frame->ipv6_dst = addr->dst; 224 } 225 226 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) { 227 basic = skb_flow_dissector_target(flow->dissector, 228 FLOW_DISSECTOR_KEY_BASIC, 229 target); 230 frame->proto = basic->ip_proto; 231 } 232 233 if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_IP)) { 234 struct flow_dissector_key_ip *flow_ip; 235 236 flow_ip = skb_flow_dissector_target(flow->dissector, 237 FLOW_DISSECTOR_KEY_IP, 238 target); 239 frame->tos = flow_ip->tos; 240 frame->ttl = flow_ip->ttl; 241 } 242 } 243 244 static void 245 nfp_flower_compile_ipv4_udp_tun(struct nfp_flower_ipv4_udp_tun *frame, 246 struct tc_cls_flower_offload *flow, 247 bool mask_version) 248 { 249 struct fl_flow_key *target = mask_version ? flow->mask : flow->key; 250 struct flow_dissector_key_ipv4_addrs *tun_ips; 251 struct flow_dissector_key_keyid *vni; 252 253 memset(frame, 0, sizeof(struct nfp_flower_ipv4_udp_tun)); 254 255 if (dissector_uses_key(flow->dissector, 256 FLOW_DISSECTOR_KEY_ENC_KEYID)) { 257 u32 temp_vni; 258 259 vni = skb_flow_dissector_target(flow->dissector, 260 FLOW_DISSECTOR_KEY_ENC_KEYID, 261 target); 262 temp_vni = be32_to_cpu(vni->keyid) << NFP_FL_TUN_VNI_OFFSET; 263 frame->tun_id = cpu_to_be32(temp_vni); 264 } 265 266 if (dissector_uses_key(flow->dissector, 267 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) { 268 tun_ips = 269 skb_flow_dissector_target(flow->dissector, 270 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, 271 target); 272 frame->ip_src = tun_ips->src; 273 frame->ip_dst = tun_ips->dst; 274 } 275 } 276 277 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 278 struct nfp_fl_key_ls *key_ls, 279 struct net_device *netdev, 280 struct nfp_fl_payload *nfp_flow, 281 enum nfp_flower_tun_type tun_type) 282 { 283 struct nfp_repr *netdev_repr; 284 int err; 285 u8 *ext; 286 u8 *msk; 287 288 memset(nfp_flow->unmasked_data, 0, key_ls->key_size); 289 memset(nfp_flow->mask_data, 0, key_ls->key_size); 290 291 ext = nfp_flow->unmasked_data; 292 msk = nfp_flow->mask_data; 293 294 /* Populate Exact Metadata. */ 295 nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)ext, 296 flow, key_ls->key_layer, false); 297 /* Populate Mask Metadata. */ 298 nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)msk, 299 flow, key_ls->key_layer, true); 300 ext += sizeof(struct nfp_flower_meta_tci); 301 msk += sizeof(struct nfp_flower_meta_tci); 302 303 /* Populate Extended Metadata if Required. */ 304 if (NFP_FLOWER_LAYER_EXT_META & key_ls->key_layer) { 305 nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)ext, 306 key_ls->key_layer_two); 307 nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)msk, 308 key_ls->key_layer_two); 309 ext += sizeof(struct nfp_flower_ext_meta); 310 msk += sizeof(struct nfp_flower_ext_meta); 311 } 312 313 /* Populate Exact Port data. */ 314 err = nfp_flower_compile_port((struct nfp_flower_in_port *)ext, 315 nfp_repr_get_port_id(netdev), 316 false, tun_type); 317 if (err) 318 return err; 319 320 /* Populate Mask Port Data. */ 321 err = nfp_flower_compile_port((struct nfp_flower_in_port *)msk, 322 nfp_repr_get_port_id(netdev), 323 true, tun_type); 324 if (err) 325 return err; 326 327 ext += sizeof(struct nfp_flower_in_port); 328 msk += sizeof(struct nfp_flower_in_port); 329 330 if (NFP_FLOWER_LAYER_MAC & key_ls->key_layer) { 331 /* Populate Exact MAC Data. */ 332 nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)ext, 333 flow, false); 334 /* Populate Mask MAC Data. */ 335 nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)msk, 336 flow, true); 337 ext += sizeof(struct nfp_flower_mac_mpls); 338 msk += sizeof(struct nfp_flower_mac_mpls); 339 } 340 341 if (NFP_FLOWER_LAYER_TP & key_ls->key_layer) { 342 /* Populate Exact TP Data. */ 343 nfp_flower_compile_tport((struct nfp_flower_tp_ports *)ext, 344 flow, false); 345 /* Populate Mask TP Data. */ 346 nfp_flower_compile_tport((struct nfp_flower_tp_ports *)msk, 347 flow, true); 348 ext += sizeof(struct nfp_flower_tp_ports); 349 msk += sizeof(struct nfp_flower_tp_ports); 350 } 351 352 if (NFP_FLOWER_LAYER_IPV4 & key_ls->key_layer) { 353 /* Populate Exact IPv4 Data. */ 354 nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)ext, 355 flow, false); 356 /* Populate Mask IPv4 Data. */ 357 nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)msk, 358 flow, true); 359 ext += sizeof(struct nfp_flower_ipv4); 360 msk += sizeof(struct nfp_flower_ipv4); 361 } 362 363 if (NFP_FLOWER_LAYER_IPV6 & key_ls->key_layer) { 364 /* Populate Exact IPv4 Data. */ 365 nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)ext, 366 flow, false); 367 /* Populate Mask IPv4 Data. */ 368 nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)msk, 369 flow, true); 370 ext += sizeof(struct nfp_flower_ipv6); 371 msk += sizeof(struct nfp_flower_ipv6); 372 } 373 374 if (key_ls->key_layer & NFP_FLOWER_LAYER_VXLAN || 375 key_ls->key_layer_two & NFP_FLOWER_LAYER2_GENEVE) { 376 __be32 tun_dst; 377 378 /* Populate Exact VXLAN Data. */ 379 nfp_flower_compile_ipv4_udp_tun((void *)ext, flow, false); 380 /* Populate Mask VXLAN Data. */ 381 nfp_flower_compile_ipv4_udp_tun((void *)msk, flow, true); 382 tun_dst = ((struct nfp_flower_ipv4_udp_tun *)ext)->ip_dst; 383 ext += sizeof(struct nfp_flower_ipv4_udp_tun); 384 msk += sizeof(struct nfp_flower_ipv4_udp_tun); 385 386 /* Configure tunnel end point MAC. */ 387 if (nfp_netdev_is_nfp_repr(netdev)) { 388 netdev_repr = netdev_priv(netdev); 389 nfp_tunnel_write_macs(netdev_repr->app); 390 391 /* Store the tunnel destination in the rule data. 392 * This must be present and be an exact match. 393 */ 394 nfp_flow->nfp_tun_ipv4_addr = tun_dst; 395 nfp_tunnel_add_ipv4_off(netdev_repr->app, tun_dst); 396 } 397 } 398 399 return 0; 400 } 401