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 }; 87 88 /** 89 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 90 * address. 91 * 92 * The dev_addr->net field must be initialized. 93 */ 94 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, 95 u16 *vlan_id); 96 97 /** 98 * rdma_resolve_ip - Resolve source and destination IP addresses to 99 * RDMA hardware addresses. 100 * @client: Address client associated with request. 101 * @src_addr: An optional source address to use in the resolution. If a 102 * source address is not provided, a usable address will be returned via 103 * the callback. 104 * @dst_addr: The destination address to resolve. 105 * @addr: A reference to a data location that will receive the resolved 106 * addresses. The data location must remain valid until the callback has 107 * been invoked. The net field of the addr struct must be valid. 108 * @timeout_ms: Amount of time to wait for the address resolution to complete. 109 * @callback: Call invoked once address resolution has completed, timed out, 110 * or been canceled. A status of 0 indicates success. 111 * @context: User-specified context associated with the call. 112 */ 113 int rdma_resolve_ip(struct rdma_addr_client *client, 114 struct sockaddr *src_addr, struct sockaddr *dst_addr, 115 struct rdma_dev_addr *addr, int timeout_ms, 116 void (*callback)(int status, struct sockaddr *src_addr, 117 struct rdma_dev_addr *addr, void *context), 118 void *context); 119 120 void rdma_addr_cancel(struct rdma_dev_addr *addr); 121 122 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 123 const unsigned char *dst_dev_addr); 124 125 int rdma_addr_size(struct sockaddr *addr); 126 127 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 128 int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgid, 129 u8 *smac, u16 *vlan_id, int if_index); 130 131 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 132 { 133 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 134 } 135 136 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 137 { 138 dev_addr->broadcast[8] = pkey >> 8; 139 dev_addr->broadcast[9] = (unsigned char) pkey; 140 } 141 142 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 143 union ib_gid *gid) 144 { 145 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 146 } 147 148 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 149 { 150 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 151 } 152 153 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 154 { 155 return dev->priv_flags & IFF_802_1Q_VLAN ? 156 vlan_dev_vlan_id(dev) : 0xffff; 157 } 158 159 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 160 { 161 switch (addr->sa_family) { 162 case AF_INET: 163 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 164 addr)->sin_addr.s_addr, 165 (struct in6_addr *)gid); 166 break; 167 case AF_INET6: 168 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); 169 break; 170 default: 171 return -EINVAL; 172 } 173 return 0; 174 } 175 176 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 177 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 178 { 179 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 180 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 181 memset(out_in, 0, sizeof(*out_in)); 182 out_in->sin_family = AF_INET; 183 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 184 } else { 185 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 186 memset(out_in, 0, sizeof(*out_in)); 187 out_in->sin6_family = AF_INET6; 188 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 189 } 190 } 191 192 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 193 union ib_gid *gid) 194 { 195 struct net_device *dev; 196 struct in_device *ip4; 197 198 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 199 if (dev) { 200 ip4 = (struct in_device *)dev->ip_ptr; 201 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) 202 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, 203 (struct in6_addr *)gid); 204 dev_put(dev); 205 } 206 } 207 208 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 209 { 210 if (dev_addr->transport == RDMA_TRANSPORT_IB && 211 dev_addr->dev_type != ARPHRD_INFINIBAND) 212 iboe_addr_get_sgid(dev_addr, gid); 213 else 214 memcpy(gid, dev_addr->src_dev_addr + 215 rdma_addr_gid_offset(dev_addr), sizeof *gid); 216 } 217 218 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 219 { 220 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 221 } 222 223 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 224 { 225 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 226 } 227 228 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 229 { 230 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 231 } 232 233 static inline enum ib_mtu iboe_get_mtu(int mtu) 234 { 235 /* 236 * reduce IB headers from effective IBoE MTU. 28 stands for 237 * atomic header which is the biggest possible header after BTH 238 */ 239 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 240 241 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 242 return IB_MTU_4096; 243 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 244 return IB_MTU_2048; 245 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 246 return IB_MTU_1024; 247 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 248 return IB_MTU_512; 249 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 250 return IB_MTU_256; 251 else 252 return 0; 253 } 254 255 static inline int iboe_get_rate(struct net_device *dev) 256 { 257 struct ethtool_cmd cmd; 258 u32 speed; 259 int err; 260 261 rtnl_lock(); 262 err = __ethtool_get_settings(dev, &cmd); 263 rtnl_unlock(); 264 if (err) 265 return IB_RATE_PORT_CURRENT; 266 267 speed = ethtool_cmd_speed(&cmd); 268 if (speed >= 40000) 269 return IB_RATE_40_GBPS; 270 else if (speed >= 30000) 271 return IB_RATE_30_GBPS; 272 else if (speed >= 20000) 273 return IB_RATE_20_GBPS; 274 else if (speed >= 10000) 275 return IB_RATE_10_GBPS; 276 else 277 return IB_RATE_PORT_CURRENT; 278 } 279 280 static inline int rdma_link_local_addr(struct in6_addr *addr) 281 { 282 if (addr->s6_addr32[0] == htonl(0xfe800000) && 283 addr->s6_addr32[1] == 0) 284 return 1; 285 286 return 0; 287 } 288 289 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 290 { 291 memcpy(mac, &addr->s6_addr[8], 3); 292 memcpy(mac + 3, &addr->s6_addr[13], 3); 293 mac[0] ^= 2; 294 } 295 296 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 297 { 298 return addr->s6_addr[0] == 0xff; 299 } 300 301 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 302 { 303 int i; 304 305 mac[0] = 0x33; 306 mac[1] = 0x33; 307 for (i = 2; i < 6; ++i) 308 mac[i] = addr->s6_addr[i + 10]; 309 } 310 311 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 312 { 313 u16 vid; 314 315 vid = dgid->raw[11] << 8 | dgid->raw[12]; 316 return vid < 0x1000 ? vid : 0xffff; 317 } 318 319 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 320 { 321 return dev->priv_flags & IFF_802_1Q_VLAN ? 322 vlan_dev_real_dev(dev) : NULL; 323 } 324 325 #endif /* IB_ADDR_H */ 326