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 #ifndef 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 <rdma/ib_verbs.h> 45 #include <rdma/ib_pack.h> 46 #include <net/if_inet6.h> 47 #include <net/ipv6.h> 48 49 struct rdma_addr_client { 50 atomic_t refcount; 51 struct completion comp; 52 }; 53 54 /** 55 * rdma_addr_register_client - Register an address client. 56 */ 57 void rdma_addr_register_client(struct rdma_addr_client *client); 58 59 /** 60 * rdma_addr_unregister_client - Deregister an address client. 61 * @client: Client object to deregister. 62 */ 63 void rdma_addr_unregister_client(struct rdma_addr_client *client); 64 65 struct rdma_dev_addr { 66 unsigned char src_dev_addr[MAX_ADDR_LEN]; 67 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 68 unsigned char broadcast[MAX_ADDR_LEN]; 69 unsigned short dev_type; 70 int bound_dev_if; 71 enum rdma_transport_type transport; 72 }; 73 74 /** 75 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 76 * address. 77 */ 78 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, 79 u16 *vlan_id); 80 81 /** 82 * rdma_resolve_ip - Resolve source and destination IP addresses to 83 * RDMA hardware addresses. 84 * @client: Address client associated with request. 85 * @src_addr: An optional source address to use in the resolution. If a 86 * source address is not provided, a usable address will be returned via 87 * the callback. 88 * @dst_addr: The destination address to resolve. 89 * @addr: A reference to a data location that will receive the resolved 90 * addresses. The data location must remain valid until the callback has 91 * been invoked. 92 * @timeout_ms: Amount of time to wait for the address resolution to complete. 93 * @callback: Call invoked once address resolution has completed, timed out, 94 * or been canceled. A status of 0 indicates success. 95 * @context: User-specified context associated with the call. 96 */ 97 int rdma_resolve_ip(struct rdma_addr_client *client, 98 struct sockaddr *src_addr, struct sockaddr *dst_addr, 99 struct rdma_dev_addr *addr, int timeout_ms, 100 void (*callback)(int status, struct sockaddr *src_addr, 101 struct rdma_dev_addr *addr, void *context), 102 void *context); 103 104 void rdma_addr_cancel(struct rdma_dev_addr *addr); 105 106 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 107 const unsigned char *dst_dev_addr); 108 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 109 int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac, 110 u16 *vlan_id, int *if_index); 111 112 static inline int ip_addr_size(struct sockaddr *addr) 113 { 114 return addr->sa_family == AF_INET6 ? 115 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); 116 } 117 118 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 119 { 120 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 121 } 122 123 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 124 { 125 dev_addr->broadcast[8] = pkey >> 8; 126 dev_addr->broadcast[9] = (unsigned char) pkey; 127 } 128 129 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 130 union ib_gid *gid) 131 { 132 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 133 } 134 135 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 136 { 137 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 138 } 139 140 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 141 { 142 uint16_t tag; 143 144 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 145 return 0xffff; 146 return tag; 147 } 148 149 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 150 { 151 switch (addr->sa_family) { 152 case AF_INET: 153 ipv6_addr_set_v4mapped(((struct sockaddr_in *)addr)->sin_addr.s_addr, 154 (struct in6_addr *)gid); 155 break; 156 case AF_INET6: 157 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 158 16); 159 /* make sure scope ID gets zeroed inside GID */ 160 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) || 161 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) { 162 gid->raw[2] = 0; 163 gid->raw[3] = 0; 164 } 165 break; 166 default: 167 return -EINVAL; 168 } 169 return 0; 170 } 171 172 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 173 static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid) 174 { 175 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 176 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 177 memset(out_in, 0, sizeof(*out_in)); 178 out_in->sin_len = sizeof(*out_in); 179 out_in->sin_family = AF_INET; 180 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 181 } else { 182 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 183 memset(out_in, 0, sizeof(*out_in)); 184 out_in->sin6_len = sizeof(*out_in); 185 out_in->sin6_family = AF_INET6; 186 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 187 } 188 return 0; 189 } 190 191 /* This func is called only in loopback ip address (127.0.0.1) 192 * case in which sgid is not relevant 193 */ 194 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 195 union ib_gid *gid) 196 { 197 } 198 199 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 200 { 201 if (dev_addr->transport == RDMA_TRANSPORT_IB && 202 dev_addr->dev_type != ARPHRD_INFINIBAND) 203 iboe_addr_get_sgid(dev_addr, gid); 204 else 205 memcpy(gid, dev_addr->src_dev_addr + 206 rdma_addr_gid_offset(dev_addr), sizeof *gid); 207 } 208 209 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 210 { 211 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 212 } 213 214 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 215 { 216 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 217 } 218 219 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 220 { 221 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 222 } 223 224 static inline enum ib_mtu iboe_get_mtu(int mtu) 225 { 226 /* 227 * reduce IB headers from effective IBoE MTU. 28 stands for 228 * atomic header which is the biggest possible header after BTH 229 */ 230 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 231 232 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 233 return IB_MTU_4096; 234 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 235 return IB_MTU_2048; 236 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 237 return IB_MTU_1024; 238 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 239 return IB_MTU_512; 240 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 241 return IB_MTU_256; 242 else 243 return 0; 244 } 245 246 static inline int iboe_get_rate(struct net_device *dev) 247 { 248 if (dev->if_baudrate >= IF_Gbps(40)) 249 return IB_RATE_40_GBPS; 250 else if (dev->if_baudrate >= IF_Gbps(30)) 251 return IB_RATE_30_GBPS; 252 else if (dev->if_baudrate >= IF_Gbps(20)) 253 return IB_RATE_20_GBPS; 254 else if (dev->if_baudrate >= IF_Gbps(10)) 255 return IB_RATE_10_GBPS; 256 else 257 return IB_RATE_PORT_CURRENT; 258 } 259 260 static inline int rdma_link_local_addr(struct in6_addr *addr) 261 { 262 if (addr->s6_addr32[0] == htonl(0xfe800000) && 263 addr->s6_addr32[1] == 0) 264 return 1; 265 266 return 0; 267 } 268 269 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 270 { 271 memcpy(mac, &addr->s6_addr[8], 3); 272 memcpy(mac + 3, &addr->s6_addr[13], 3); 273 mac[0] ^= 2; 274 } 275 276 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 277 { 278 return addr->s6_addr[0] == 0xff; 279 } 280 281 static inline void resolve_mcast_mac(struct in6_addr *addr, u8 *mac) 282 { 283 if (addr->s6_addr[0] != 0xff) 284 return; 285 286 #ifdef DUAL_MODE_MCAST_MAC 287 if (addr->s6_addr[1] == 0x0e) /* IPv4 */ 288 ip_eth_mc_map(addr->s6_addr32[3], mac); 289 else 290 #endif 291 ipv6_eth_mc_map(addr, mac); 292 } 293 294 295 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 296 { 297 int i; 298 299 mac[0] = 0x33; 300 mac[1] = 0x33; 301 for (i = 2; i < 6; ++i) 302 mac[i] = addr->s6_addr[i + 10]; 303 } 304 305 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 306 { 307 u16 vid; 308 309 vid = dgid->raw[11] << 8 | dgid->raw[12]; 310 return vid < 0x1000 ? vid : 0xffff; 311 } 312 313 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 314 { 315 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 316 } 317 318 #endif /* IB_ADDR_H */ 319