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 56 struct rdma_addr_client { 57 atomic_t refcount; 58 struct completion comp; 59 }; 60 61 /** 62 * rdma_addr_register_client - Register an address client. 63 */ 64 void rdma_addr_register_client(struct rdma_addr_client *client); 65 66 /** 67 * rdma_addr_unregister_client - Deregister an address client. 68 * @client: Client object to deregister. 69 */ 70 void rdma_addr_unregister_client(struct rdma_addr_client *client); 71 72 /** 73 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 74 * @src_dev_addr: Source MAC address. 75 * @dst_dev_addr: Destination MAC address. 76 * @broadcast: Broadcast address of the device. 77 * @dev_type: The interface hardware type of the device. 78 * @bound_dev_if: An optional device interface index. 79 * @transport: The transport type used. 80 * @net: Network namespace containing the bound_dev_if net_dev. 81 */ 82 struct vnet; 83 struct rdma_dev_addr { 84 unsigned char src_dev_addr[MAX_ADDR_LEN]; 85 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 86 unsigned char broadcast[MAX_ADDR_LEN]; 87 unsigned short dev_type; 88 int bound_dev_if; 89 enum rdma_transport_type transport; 90 struct vnet *net; 91 enum rdma_network_type network; 92 int hoplimit; 93 }; 94 95 /** 96 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 97 * address. 98 * 99 * The dev_addr->net and dev_addr->bound_dev_if fields must be initialized. 100 */ 101 int rdma_translate_ip(const struct sockaddr *addr, 102 struct rdma_dev_addr *dev_addr); 103 104 /** 105 * rdma_resolve_ip - Resolve source and destination IP addresses to 106 * RDMA hardware addresses. 107 * @client: Address client associated with request. 108 * @src_addr: An optional source address to use in the resolution. If a 109 * source address is not provided, a usable address will be returned via 110 * the callback. 111 * @dst_addr: The destination address to resolve. 112 * @addr: A reference to a data location that will receive the resolved 113 * addresses. The data location must remain valid until the callback has 114 * been invoked. The net field of the addr struct must be valid. 115 * @timeout_ms: Amount of time to wait for the address resolution to complete. 116 * @callback: Call invoked once address resolution has completed, timed out, 117 * or been canceled. A status of 0 indicates success. 118 * @context: User-specified context associated with the call. 119 */ 120 int rdma_resolve_ip(struct rdma_addr_client *client, 121 struct sockaddr *src_addr, struct sockaddr *dst_addr, 122 struct rdma_dev_addr *addr, int timeout_ms, 123 void (*callback)(int status, struct sockaddr *src_addr, 124 struct rdma_dev_addr *addr, void *context), 125 void *context); 126 127 int rdma_resolve_ip_route(struct sockaddr *src_addr, 128 const struct sockaddr *dst_addr, 129 struct rdma_dev_addr *addr); 130 131 void rdma_addr_cancel(struct rdma_dev_addr *addr); 132 133 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 134 const unsigned char *dst_dev_addr); 135 136 int rdma_addr_size(struct sockaddr *addr); 137 138 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, 139 const union ib_gid *dgid, 140 u8 *smac, struct net_device *dev, 141 int *hoplimit); 142 143 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 144 { 145 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 146 } 147 148 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 149 { 150 dev_addr->broadcast[8] = pkey >> 8; 151 dev_addr->broadcast[9] = (unsigned char) pkey; 152 } 153 154 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 155 union ib_gid *gid) 156 { 157 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 158 } 159 160 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 161 { 162 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 163 } 164 165 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 166 { 167 uint16_t tag; 168 169 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 170 return 0xffff; 171 return tag; 172 } 173 174 static inline int rdma_ip2gid(const struct sockaddr *addr, union ib_gid *gid) 175 { 176 switch (addr->sa_family) { 177 case AF_INET: 178 ipv6_addr_set_v4mapped(((const struct sockaddr_in *) 179 addr)->sin_addr.s_addr, 180 (struct in6_addr *)gid); 181 break; 182 case AF_INET6: 183 memcpy(gid->raw, &((const struct sockaddr_in6 *)addr)->sin6_addr, 16); 184 /* make sure scope ID gets zeroed inside GID */ 185 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) || 186 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) { 187 gid->raw[2] = 0; 188 gid->raw[3] = 0; 189 } 190 break; 191 default: 192 return -EINVAL; 193 } 194 return 0; 195 } 196 197 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 198 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 199 { 200 if (ipv6_addr_v4mapped((const struct in6_addr *)gid)) { 201 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 202 memset(out_in, 0, sizeof(*out_in)); 203 out_in->sin_len = sizeof(*out_in); 204 out_in->sin_family = AF_INET; 205 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 206 } else { 207 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 208 memset(out_in, 0, sizeof(*out_in)); 209 out_in->sin6_len = sizeof(*out_in); 210 out_in->sin6_family = AF_INET6; 211 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 212 } 213 } 214 215 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 216 union ib_gid *gid) 217 { 218 struct net_device *dev; 219 struct ifaddr *ifa; 220 221 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 222 if (dev) { 223 CK_STAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) { 224 if (ifa->ifa_addr == NULL || 225 ifa->ifa_addr->sa_family != AF_INET) 226 continue; 227 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 228 ifa->ifa_addr)->sin_addr.s_addr, 229 (struct in6_addr *)gid); 230 break; 231 } 232 dev_put(dev); 233 } 234 } 235 236 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 237 { 238 if (dev_addr->transport == RDMA_TRANSPORT_IB && 239 dev_addr->dev_type != ARPHRD_INFINIBAND) 240 iboe_addr_get_sgid(dev_addr, gid); 241 else 242 memcpy(gid, dev_addr->src_dev_addr + 243 rdma_addr_gid_offset(dev_addr), sizeof *gid); 244 } 245 246 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 247 { 248 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 249 } 250 251 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 252 { 253 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 254 } 255 256 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 257 { 258 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 259 } 260 261 static inline enum ib_mtu iboe_get_mtu(int mtu) 262 { 263 /* 264 * reduce IB headers from effective IBoE MTU. 28 stands for 265 * atomic header which is the biggest possible header after BTH 266 */ 267 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 268 269 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 270 return IB_MTU_4096; 271 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 272 return IB_MTU_2048; 273 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 274 return IB_MTU_1024; 275 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 276 return IB_MTU_512; 277 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 278 return IB_MTU_256; 279 else 280 return 0; 281 } 282 283 static inline int iboe_get_rate(struct net_device *dev) 284 { 285 uint64_t baudrate = dev->if_baudrate; 286 #ifdef if_baudrate_pf 287 int exp; 288 for (exp = dev->if_baudrate_pf; exp > 0; exp--) 289 baudrate *= 10; 290 #endif 291 if (baudrate >= IF_Gbps(40)) 292 return IB_RATE_40_GBPS; 293 else if (baudrate >= IF_Gbps(30)) 294 return IB_RATE_30_GBPS; 295 else if (baudrate >= IF_Gbps(20)) 296 return IB_RATE_20_GBPS; 297 else if (baudrate >= IF_Gbps(10)) 298 return IB_RATE_10_GBPS; 299 else 300 return IB_RATE_PORT_CURRENT; 301 } 302 303 static inline int rdma_link_local_addr(struct in6_addr *addr) 304 { 305 if (addr->s6_addr32[0] == htonl(0xfe800000) && 306 addr->s6_addr32[1] == 0) 307 return 1; 308 309 return 0; 310 } 311 312 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 313 { 314 memcpy(mac, &addr->s6_addr[8], 3); 315 memcpy(mac + 3, &addr->s6_addr[13], 3); 316 mac[0] ^= 2; 317 } 318 319 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 320 { 321 return addr->s6_addr[0] == 0xff; 322 } 323 324 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 325 { 326 int i; 327 328 mac[0] = 0x33; 329 mac[1] = 0x33; 330 for (i = 2; i < 6; ++i) 331 mac[i] = addr->s6_addr[i + 10]; 332 } 333 334 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 335 { 336 u16 vid; 337 338 vid = dgid->raw[11] << 8 | dgid->raw[12]; 339 return vid < 0x1000 ? vid : 0xffff; 340 } 341 342 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 343 { 344 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 345 } 346 347 #endif /* IB_ADDR_H */ 348