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 }; 88 89 /** 90 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 91 * address. 92 * 93 * The dev_addr->net field must be initialized. 94 */ 95 int rdma_translate_ip(const struct sockaddr *addr, 96 struct rdma_dev_addr *dev_addr, u16 *vlan_id); 97 98 /** 99 * rdma_resolve_ip - Resolve source and destination IP addresses to 100 * RDMA hardware addresses. 101 * @client: Address client associated with request. 102 * @src_addr: An optional source address to use in the resolution. If a 103 * source address is not provided, a usable address will be returned via 104 * the callback. 105 * @dst_addr: The destination address to resolve. 106 * @addr: A reference to a data location that will receive the resolved 107 * addresses. The data location must remain valid until the callback has 108 * been invoked. The net field of the addr struct must be valid. 109 * @timeout_ms: Amount of time to wait for the address resolution to complete. 110 * @callback: Call invoked once address resolution has completed, timed out, 111 * or been canceled. A status of 0 indicates success. 112 * @context: User-specified context associated with the call. 113 */ 114 int rdma_resolve_ip(struct rdma_addr_client *client, 115 struct sockaddr *src_addr, struct sockaddr *dst_addr, 116 struct rdma_dev_addr *addr, int timeout_ms, 117 void (*callback)(int status, struct sockaddr *src_addr, 118 struct rdma_dev_addr *addr, void *context), 119 void *context); 120 121 int rdma_resolve_ip_route(struct sockaddr *src_addr, 122 const struct sockaddr *dst_addr, 123 struct rdma_dev_addr *addr); 124 125 void rdma_addr_cancel(struct rdma_dev_addr *addr); 126 127 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 128 const unsigned char *dst_dev_addr); 129 130 int rdma_addr_size(struct sockaddr *addr); 131 132 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 133 int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgid, 134 u8 *smac, u16 *vlan_id, int *if_index); 135 136 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 137 { 138 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 139 } 140 141 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 142 { 143 dev_addr->broadcast[8] = pkey >> 8; 144 dev_addr->broadcast[9] = (unsigned char) pkey; 145 } 146 147 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 148 union ib_gid *gid) 149 { 150 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 151 } 152 153 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 154 { 155 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 156 } 157 158 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 159 { 160 return dev->priv_flags & IFF_802_1Q_VLAN ? 161 vlan_dev_vlan_id(dev) : 0xffff; 162 } 163 164 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 165 { 166 switch (addr->sa_family) { 167 case AF_INET: 168 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 169 addr)->sin_addr.s_addr, 170 (struct in6_addr *)gid); 171 break; 172 case AF_INET6: 173 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); 174 break; 175 default: 176 return -EINVAL; 177 } 178 return 0; 179 } 180 181 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 182 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 183 { 184 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 185 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 186 memset(out_in, 0, sizeof(*out_in)); 187 out_in->sin_family = AF_INET; 188 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 189 } else { 190 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 191 memset(out_in, 0, sizeof(*out_in)); 192 out_in->sin6_family = AF_INET6; 193 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 194 } 195 } 196 197 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 198 union ib_gid *gid) 199 { 200 struct net_device *dev; 201 struct in_device *ip4; 202 203 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 204 if (dev) { 205 ip4 = (struct in_device *)dev->ip_ptr; 206 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) 207 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, 208 (struct in6_addr *)gid); 209 dev_put(dev); 210 } 211 } 212 213 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 214 { 215 if (dev_addr->transport == RDMA_TRANSPORT_IB && 216 dev_addr->dev_type != ARPHRD_INFINIBAND) 217 iboe_addr_get_sgid(dev_addr, gid); 218 else 219 memcpy(gid, dev_addr->src_dev_addr + 220 rdma_addr_gid_offset(dev_addr), sizeof *gid); 221 } 222 223 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 224 { 225 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 226 } 227 228 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 229 { 230 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 231 } 232 233 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 234 { 235 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 236 } 237 238 static inline enum ib_mtu iboe_get_mtu(int mtu) 239 { 240 /* 241 * reduce IB headers from effective IBoE MTU. 28 stands for 242 * atomic header which is the biggest possible header after BTH 243 */ 244 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 245 246 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 247 return IB_MTU_4096; 248 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 249 return IB_MTU_2048; 250 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 251 return IB_MTU_1024; 252 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 253 return IB_MTU_512; 254 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 255 return IB_MTU_256; 256 else 257 return 0; 258 } 259 260 static inline int iboe_get_rate(struct net_device *dev) 261 { 262 struct ethtool_cmd cmd; 263 u32 speed; 264 int err; 265 266 rtnl_lock(); 267 err = __ethtool_get_settings(dev, &cmd); 268 rtnl_unlock(); 269 if (err) 270 return IB_RATE_PORT_CURRENT; 271 272 speed = ethtool_cmd_speed(&cmd); 273 if (speed >= 40000) 274 return IB_RATE_40_GBPS; 275 else if (speed >= 30000) 276 return IB_RATE_30_GBPS; 277 else if (speed >= 20000) 278 return IB_RATE_20_GBPS; 279 else if (speed >= 10000) 280 return IB_RATE_10_GBPS; 281 else 282 return IB_RATE_PORT_CURRENT; 283 } 284 285 static inline int rdma_link_local_addr(struct in6_addr *addr) 286 { 287 if (addr->s6_addr32[0] == htonl(0xfe800000) && 288 addr->s6_addr32[1] == 0) 289 return 1; 290 291 return 0; 292 } 293 294 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 295 { 296 memcpy(mac, &addr->s6_addr[8], 3); 297 memcpy(mac + 3, &addr->s6_addr[13], 3); 298 mac[0] ^= 2; 299 } 300 301 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 302 { 303 return addr->s6_addr[0] == 0xff; 304 } 305 306 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 307 { 308 int i; 309 310 mac[0] = 0x33; 311 mac[1] = 0x33; 312 for (i = 2; i < 6; ++i) 313 mac[i] = addr->s6_addr[i + 10]; 314 } 315 316 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 317 { 318 u16 vid; 319 320 vid = dgid->raw[11] << 8 | dgid->raw[12]; 321 return vid < 0x1000 ? vid : 0xffff; 322 } 323 324 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 325 { 326 return dev->priv_flags & IFF_802_1Q_VLAN ? 327 vlan_dev_real_dev(dev) : NULL; 328 } 329 330 #endif /* IB_ADDR_H */ 331