1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 5 * Copyright (c) 2005 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 * 35 * $FreeBSD$ 36 */ 37 38 #if !defined(IB_ADDR_H) 39 #define IB_ADDR_H 40 41 #include <linux/in.h> 42 #include <linux/in6.h> 43 #include <linux/if_arp.h> 44 #include <linux/netdevice.h> 45 #include <linux/inetdevice.h> 46 #include <linux/socket.h> 47 #include <linux/if_vlan.h> 48 #include <net/ipv6.h> 49 #include <net/if_inet6.h> 50 #include <net/ip.h> 51 #include <rdma/ib_verbs.h> 52 #include <rdma/ib_pack.h> 53 #include <net/ipv6.h> 54 55 struct rdma_addr_client { 56 atomic_t refcount; 57 struct completion comp; 58 }; 59 60 /** 61 * rdma_addr_register_client - Register an address client. 62 */ 63 void rdma_addr_register_client(struct rdma_addr_client *client); 64 65 /** 66 * rdma_addr_unregister_client - Deregister an address client. 67 * @client: Client object to deregister. 68 */ 69 void rdma_addr_unregister_client(struct rdma_addr_client *client); 70 71 /** 72 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 73 * @src_dev_addr: Source MAC address. 74 * @dst_dev_addr: Destination MAC address. 75 * @broadcast: Broadcast address of the device. 76 * @dev_type: The interface hardware type of the device. 77 * @bound_dev_if: An optional device interface index. 78 * @transport: The transport type used. 79 * @net: Network namespace containing the bound_dev_if net_dev. 80 */ 81 struct vnet; 82 struct rdma_dev_addr { 83 unsigned char src_dev_addr[MAX_ADDR_LEN]; 84 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 85 unsigned char broadcast[MAX_ADDR_LEN]; 86 unsigned short dev_type; 87 int bound_dev_if; 88 enum rdma_transport_type transport; 89 struct vnet *net; 90 enum rdma_network_type network; 91 int hoplimit; 92 }; 93 94 /** 95 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 96 * address. 97 * 98 * The dev_addr->net and dev_addr->bound_dev_if fields must be initialized. 99 */ 100 int rdma_translate_ip(const struct sockaddr *addr, 101 struct rdma_dev_addr *dev_addr); 102 103 /** 104 * rdma_resolve_ip - Resolve source and destination IP addresses to 105 * RDMA hardware addresses. 106 * @client: Address client associated with request. 107 * @src_addr: An optional source address to use in the resolution. If a 108 * source address is not provided, a usable address will be returned via 109 * the callback. 110 * @dst_addr: The destination address to resolve. 111 * @addr: A reference to a data location that will receive the resolved 112 * addresses. The data location must remain valid until the callback has 113 * been invoked. The net field of the addr struct must be valid. 114 * @timeout_ms: Amount of time to wait for the address resolution to complete. 115 * @callback: Call invoked once address resolution has completed, timed out, 116 * or been canceled. A status of 0 indicates success. 117 * @context: User-specified context associated with the call. 118 */ 119 int rdma_resolve_ip(struct rdma_addr_client *client, 120 struct sockaddr *src_addr, struct sockaddr *dst_addr, 121 struct rdma_dev_addr *addr, int timeout_ms, 122 void (*callback)(int status, struct sockaddr *src_addr, 123 struct rdma_dev_addr *addr, void *context), 124 void *context); 125 126 int rdma_resolve_ip_route(struct sockaddr *src_addr, 127 const struct sockaddr *dst_addr, 128 struct rdma_dev_addr *addr); 129 130 void rdma_addr_cancel(struct rdma_dev_addr *addr); 131 132 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 133 const unsigned char *dst_dev_addr); 134 135 int rdma_addr_size(struct sockaddr *addr); 136 137 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, 138 const union ib_gid *dgid, 139 u8 *smac, struct net_device *dev, 140 int *hoplimit); 141 142 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 143 { 144 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 145 } 146 147 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 148 { 149 dev_addr->broadcast[8] = pkey >> 8; 150 dev_addr->broadcast[9] = (unsigned char) pkey; 151 } 152 153 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 154 union ib_gid *gid) 155 { 156 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 157 } 158 159 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 160 { 161 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 162 } 163 164 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 165 { 166 uint16_t tag; 167 168 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 169 return 0xffff; 170 return tag; 171 } 172 173 static inline int rdma_ip2gid(const struct sockaddr *addr, union ib_gid *gid) 174 { 175 switch (addr->sa_family) { 176 case AF_INET: 177 ipv6_addr_set_v4mapped(((const struct sockaddr_in *) 178 addr)->sin_addr.s_addr, 179 (struct in6_addr *)gid); 180 break; 181 case AF_INET6: 182 memcpy(gid->raw, &((const struct sockaddr_in6 *)addr)->sin6_addr, 16); 183 /* make sure scope ID gets zeroed inside GID */ 184 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) || 185 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) { 186 gid->raw[2] = 0; 187 gid->raw[3] = 0; 188 } 189 break; 190 default: 191 return -EINVAL; 192 } 193 return 0; 194 } 195 196 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 197 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 198 { 199 if (ipv6_addr_v4mapped((const struct in6_addr *)gid)) { 200 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 201 memset(out_in, 0, sizeof(*out_in)); 202 out_in->sin_len = sizeof(*out_in); 203 out_in->sin_family = AF_INET; 204 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 205 } else { 206 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 207 memset(out_in, 0, sizeof(*out_in)); 208 out_in->sin6_len = sizeof(*out_in); 209 out_in->sin6_family = AF_INET6; 210 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 211 } 212 } 213 214 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 215 union ib_gid *gid) 216 { 217 struct net_device *dev; 218 struct ifaddr *ifa; 219 220 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 221 if (dev) { 222 TAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) { 223 if (ifa->ifa_addr == NULL || 224 ifa->ifa_addr->sa_family != AF_INET) 225 continue; 226 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 227 ifa->ifa_addr)->sin_addr.s_addr, 228 (struct in6_addr *)gid); 229 break; 230 } 231 dev_put(dev); 232 } 233 } 234 235 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 236 { 237 if (dev_addr->transport == RDMA_TRANSPORT_IB && 238 dev_addr->dev_type != ARPHRD_INFINIBAND) 239 iboe_addr_get_sgid(dev_addr, gid); 240 else 241 memcpy(gid, dev_addr->src_dev_addr + 242 rdma_addr_gid_offset(dev_addr), sizeof *gid); 243 } 244 245 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 246 { 247 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 248 } 249 250 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 251 { 252 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 253 } 254 255 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 256 { 257 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 258 } 259 260 static inline enum ib_mtu iboe_get_mtu(int mtu) 261 { 262 /* 263 * reduce IB headers from effective IBoE MTU. 28 stands for 264 * atomic header which is the biggest possible header after BTH 265 */ 266 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 267 268 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 269 return IB_MTU_4096; 270 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 271 return IB_MTU_2048; 272 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 273 return IB_MTU_1024; 274 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 275 return IB_MTU_512; 276 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 277 return IB_MTU_256; 278 else 279 return 0; 280 } 281 282 static inline int iboe_get_rate(struct net_device *dev) 283 { 284 uint64_t baudrate = dev->if_baudrate; 285 #ifdef if_baudrate_pf 286 int exp; 287 for (exp = dev->if_baudrate_pf; exp > 0; exp--) 288 baudrate *= 10; 289 #endif 290 if (baudrate >= IF_Gbps(40)) 291 return IB_RATE_40_GBPS; 292 else if (baudrate >= IF_Gbps(30)) 293 return IB_RATE_30_GBPS; 294 else if (baudrate >= IF_Gbps(20)) 295 return IB_RATE_20_GBPS; 296 else if (baudrate >= IF_Gbps(10)) 297 return IB_RATE_10_GBPS; 298 else 299 return IB_RATE_PORT_CURRENT; 300 } 301 302 static inline int rdma_link_local_addr(struct in6_addr *addr) 303 { 304 if (addr->s6_addr32[0] == htonl(0xfe800000) && 305 addr->s6_addr32[1] == 0) 306 return 1; 307 308 return 0; 309 } 310 311 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 312 { 313 memcpy(mac, &addr->s6_addr[8], 3); 314 memcpy(mac + 3, &addr->s6_addr[13], 3); 315 mac[0] ^= 2; 316 } 317 318 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 319 { 320 return addr->s6_addr[0] == 0xff; 321 } 322 323 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 324 { 325 int i; 326 327 mac[0] = 0x33; 328 mac[1] = 0x33; 329 for (i = 2; i < 6; ++i) 330 mac[i] = addr->s6_addr[i + 10]; 331 } 332 333 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 334 { 335 u16 vid; 336 337 vid = dgid->raw[11] << 8 | dgid->raw[12]; 338 return vid < 0x1000 ? vid : 0xffff; 339 } 340 341 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 342 { 343 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 344 } 345 346 #endif /* IB_ADDR_H */ 347