1 /* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2005 Intel Corporation. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 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 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - 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 #if !defined(IB_ADDR_H) 35 #define IB_ADDR_H 36 37 #include <linux/in.h> 38 #include <linux/in6.h> 39 #include <linux/if_arp.h> 40 #include <linux/netdevice.h> 41 #include <linux/inetdevice.h> 42 #include <linux/socket.h> 43 #include <linux/if_vlan.h> 44 #include <net/ipv6.h> 45 #include <net/if_inet6.h> 46 #include <net/ip.h> 47 #include <rdma/ib_verbs.h> 48 #include <rdma/ib_pack.h> 49 #include <net/ipv6.h> 50 #include <net/net_namespace.h> 51 52 struct rdma_addr_client { 53 atomic_t refcount; 54 struct completion comp; 55 }; 56 57 /** 58 * rdma_addr_register_client - Register an address client. 59 */ 60 void rdma_addr_register_client(struct rdma_addr_client *client); 61 62 /** 63 * rdma_addr_unregister_client - Deregister an address client. 64 * @client: Client object to deregister. 65 */ 66 void rdma_addr_unregister_client(struct rdma_addr_client *client); 67 68 /** 69 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 70 * @src_dev_addr: Source MAC address. 71 * @dst_dev_addr: Destination MAC address. 72 * @broadcast: Broadcast address of the device. 73 * @dev_type: The interface hardware type of the device. 74 * @bound_dev_if: An optional device interface index. 75 * @transport: The transport type used. 76 * @net: Network namespace containing the bound_dev_if net_dev. 77 */ 78 struct rdma_dev_addr { 79 unsigned char src_dev_addr[MAX_ADDR_LEN]; 80 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 81 unsigned char broadcast[MAX_ADDR_LEN]; 82 unsigned short dev_type; 83 int bound_dev_if; 84 enum rdma_transport_type transport; 85 struct net *net; 86 enum rdma_network_type network; 87 int hoplimit; 88 }; 89 90 /** 91 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 92 * address. 93 * 94 * The dev_addr->net field must be initialized. 95 */ 96 int rdma_translate_ip(const struct sockaddr *addr, 97 struct rdma_dev_addr *dev_addr, u16 *vlan_id); 98 99 /** 100 * rdma_resolve_ip - Resolve source and destination IP addresses to 101 * RDMA hardware addresses. 102 * @client: Address client associated with request. 103 * @src_addr: An optional source address to use in the resolution. If a 104 * source address is not provided, a usable address will be returned via 105 * the callback. 106 * @dst_addr: The destination address to resolve. 107 * @addr: A reference to a data location that will receive the resolved 108 * addresses. The data location must remain valid until the callback has 109 * been invoked. The net field of the addr struct must be valid. 110 * @timeout_ms: Amount of time to wait for the address resolution to complete. 111 * @callback: Call invoked once address resolution has completed, timed out, 112 * or been canceled. A status of 0 indicates success. 113 * @context: User-specified context associated with the call. 114 */ 115 int rdma_resolve_ip(struct rdma_addr_client *client, 116 struct sockaddr *src_addr, struct sockaddr *dst_addr, 117 struct rdma_dev_addr *addr, int timeout_ms, 118 void (*callback)(int status, struct sockaddr *src_addr, 119 struct rdma_dev_addr *addr, void *context), 120 void *context); 121 122 int rdma_resolve_ip_route(struct sockaddr *src_addr, 123 const struct sockaddr *dst_addr, 124 struct rdma_dev_addr *addr); 125 126 void rdma_addr_cancel(struct rdma_dev_addr *addr); 127 128 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 129 const unsigned char *dst_dev_addr); 130 131 int rdma_addr_size(struct sockaddr *addr); 132 133 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 134 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, 135 const union ib_gid *dgid, 136 u8 *smac, u16 *vlan_id, int *if_index, 137 int *hoplimit); 138 139 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 140 { 141 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 142 } 143 144 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 145 { 146 dev_addr->broadcast[8] = pkey >> 8; 147 dev_addr->broadcast[9] = (unsigned char) pkey; 148 } 149 150 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 151 union ib_gid *gid) 152 { 153 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 154 } 155 156 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 157 { 158 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 159 } 160 161 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 162 { 163 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; 164 } 165 166 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 167 { 168 switch (addr->sa_family) { 169 case AF_INET: 170 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 171 addr)->sin_addr.s_addr, 172 (struct in6_addr *)gid); 173 break; 174 case AF_INET6: 175 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); 176 break; 177 default: 178 return -EINVAL; 179 } 180 return 0; 181 } 182 183 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 184 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 185 { 186 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 187 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 188 memset(out_in, 0, sizeof(*out_in)); 189 out_in->sin_family = AF_INET; 190 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 191 } else { 192 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 193 memset(out_in, 0, sizeof(*out_in)); 194 out_in->sin6_family = AF_INET6; 195 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 196 } 197 } 198 199 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 200 union ib_gid *gid) 201 { 202 struct net_device *dev; 203 struct in_device *ip4; 204 205 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 206 if (dev) { 207 ip4 = in_dev_get(dev); 208 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) { 209 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, 210 (struct in6_addr *)gid); 211 in_dev_put(ip4); 212 } 213 dev_put(dev); 214 } 215 } 216 217 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 218 { 219 if (dev_addr->transport == RDMA_TRANSPORT_IB && 220 dev_addr->dev_type != ARPHRD_INFINIBAND) 221 iboe_addr_get_sgid(dev_addr, gid); 222 else 223 memcpy(gid, dev_addr->src_dev_addr + 224 rdma_addr_gid_offset(dev_addr), sizeof *gid); 225 } 226 227 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 228 { 229 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 230 } 231 232 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 233 { 234 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 235 } 236 237 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 238 { 239 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 240 } 241 242 static inline enum ib_mtu iboe_get_mtu(int mtu) 243 { 244 /* 245 * reduce IB headers from effective IBoE MTU. 28 stands for 246 * atomic header which is the biggest possible header after BTH 247 */ 248 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 249 250 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 251 return IB_MTU_4096; 252 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 253 return IB_MTU_2048; 254 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 255 return IB_MTU_1024; 256 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 257 return IB_MTU_512; 258 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 259 return IB_MTU_256; 260 else 261 return 0; 262 } 263 264 static inline int iboe_get_rate(struct net_device *dev) 265 { 266 struct ethtool_link_ksettings cmd; 267 int err; 268 269 rtnl_lock(); 270 err = __ethtool_get_link_ksettings(dev, &cmd); 271 rtnl_unlock(); 272 if (err) 273 return IB_RATE_PORT_CURRENT; 274 275 if (cmd.base.speed >= 40000) 276 return IB_RATE_40_GBPS; 277 else if (cmd.base.speed >= 30000) 278 return IB_RATE_30_GBPS; 279 else if (cmd.base.speed >= 20000) 280 return IB_RATE_20_GBPS; 281 else if (cmd.base.speed >= 10000) 282 return IB_RATE_10_GBPS; 283 else 284 return IB_RATE_PORT_CURRENT; 285 } 286 287 static inline int rdma_link_local_addr(struct in6_addr *addr) 288 { 289 if (addr->s6_addr32[0] == htonl(0xfe800000) && 290 addr->s6_addr32[1] == 0) 291 return 1; 292 293 return 0; 294 } 295 296 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 297 { 298 memcpy(mac, &addr->s6_addr[8], 3); 299 memcpy(mac + 3, &addr->s6_addr[13], 3); 300 mac[0] ^= 2; 301 } 302 303 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 304 { 305 return addr->s6_addr[0] == 0xff; 306 } 307 308 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 309 { 310 int i; 311 312 mac[0] = 0x33; 313 mac[1] = 0x33; 314 for (i = 2; i < 6; ++i) 315 mac[i] = addr->s6_addr[i + 10]; 316 } 317 318 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 319 { 320 u16 vid; 321 322 vid = dgid->raw[11] << 8 | dgid->raw[12]; 323 return vid < 0x1000 ? vid : 0xffff; 324 } 325 326 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 327 { 328 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; 329 } 330 331 #endif /* IB_ADDR_H */ 332