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 u32 scope_id); 110 int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac, 111 u16 *vlan_id, u32 scope_id); 112 113 static inline int ip_addr_size(struct sockaddr *addr) 114 { 115 return addr->sa_family == AF_INET6 ? 116 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); 117 } 118 119 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 120 { 121 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 122 } 123 124 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 125 { 126 dev_addr->broadcast[8] = pkey >> 8; 127 dev_addr->broadcast[9] = (unsigned char) pkey; 128 } 129 130 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 131 union ib_gid *gid) 132 { 133 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 134 } 135 136 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 137 { 138 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 139 } 140 141 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 142 { 143 uint16_t tag; 144 145 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 146 return 0xffff; 147 return tag; 148 } 149 150 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 151 { 152 switch (addr->sa_family) { 153 case AF_INET: 154 ipv6_addr_set_v4mapped(((struct sockaddr_in *)addr)->sin_addr.s_addr, 155 (struct in6_addr *)gid); 156 break; 157 case AF_INET6: 158 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 159 16); 160 /* make sure scope ID gets zeroed inside GID */ 161 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) || 162 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) { 163 gid->raw[2] = 0; 164 gid->raw[3] = 0; 165 } 166 break; 167 default: 168 return -EINVAL; 169 } 170 return 0; 171 } 172 173 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 174 static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid, 175 uint32_t scope_id) 176 { 177 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 178 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 179 memset(out_in, 0, sizeof(*out_in)); 180 out_in->sin_len = sizeof(*out_in); 181 out_in->sin_family = AF_INET; 182 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 183 } else { 184 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 185 memset(out_in, 0, sizeof(*out_in)); 186 out_in->sin6_len = sizeof(*out_in); 187 out_in->sin6_family = AF_INET6; 188 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 189 if (scope_id < 256 && 190 IN6_IS_SCOPE_LINKLOCAL(&out_in->sin6_addr)) 191 out_in->sin6_scope_id = scope_id; 192 } 193 return 0; 194 } 195 196 u32 rdma_get_ipv6_scope_id(struct ib_device *ib, u8 port_num); 197 198 /* This func is called only in loopback ip address (127.0.0.1) 199 * case in which sgid is not relevant 200 */ 201 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 202 union ib_gid *gid) 203 { 204 } 205 206 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 207 { 208 if (dev_addr->transport == RDMA_TRANSPORT_IB && 209 dev_addr->dev_type != ARPHRD_INFINIBAND) 210 iboe_addr_get_sgid(dev_addr, gid); 211 else 212 memcpy(gid, dev_addr->src_dev_addr + 213 rdma_addr_gid_offset(dev_addr), sizeof *gid); 214 } 215 216 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 217 { 218 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 219 } 220 221 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 222 { 223 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 224 } 225 226 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 227 { 228 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 229 } 230 231 static inline enum ib_mtu iboe_get_mtu(int mtu) 232 { 233 /* 234 * reduce IB headers from effective IBoE MTU. 28 stands for 235 * atomic header which is the biggest possible header after BTH 236 */ 237 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 238 239 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 240 return IB_MTU_4096; 241 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 242 return IB_MTU_2048; 243 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 244 return IB_MTU_1024; 245 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 246 return IB_MTU_512; 247 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 248 return IB_MTU_256; 249 else 250 return 0; 251 } 252 253 static inline int iboe_get_rate(struct net_device *dev) 254 { 255 if (dev->if_baudrate >= IF_Gbps(40)) 256 return IB_RATE_40_GBPS; 257 else if (dev->if_baudrate >= IF_Gbps(30)) 258 return IB_RATE_30_GBPS; 259 else if (dev->if_baudrate >= IF_Gbps(20)) 260 return IB_RATE_20_GBPS; 261 else if (dev->if_baudrate >= IF_Gbps(10)) 262 return IB_RATE_10_GBPS; 263 else 264 return IB_RATE_PORT_CURRENT; 265 } 266 267 static inline int rdma_link_local_addr(struct in6_addr *addr) 268 { 269 if (addr->s6_addr32[0] == htonl(0xfe800000) && 270 addr->s6_addr32[1] == 0) 271 return 1; 272 273 return 0; 274 } 275 276 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 277 { 278 memcpy(mac, &addr->s6_addr[8], 3); 279 memcpy(mac + 3, &addr->s6_addr[13], 3); 280 mac[0] ^= 2; 281 } 282 283 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 284 { 285 return addr->s6_addr[0] == 0xff; 286 } 287 288 static inline void resolve_mcast_mac(struct in6_addr *addr, u8 *mac) 289 { 290 if (addr->s6_addr[0] != 0xff) 291 return; 292 293 #ifdef DUAL_MODE_MCAST_MAC 294 if (addr->s6_addr[1] == 0x0e) /* IPv4 */ 295 ip_eth_mc_map(addr->s6_addr32[3], mac); 296 else 297 #endif 298 ipv6_eth_mc_map(addr, mac); 299 } 300 301 302 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 303 { 304 int i; 305 306 mac[0] = 0x33; 307 mac[1] = 0x33; 308 for (i = 2; i < 6; ++i) 309 mac[i] = addr->s6_addr[i + 10]; 310 } 311 312 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 313 { 314 u16 vid; 315 316 vid = dgid->raw[11] << 8 | dgid->raw[12]; 317 return vid < 0x1000 ? vid : 0xffff; 318 } 319 320 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 321 { 322 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 323 } 324 325 #endif /* IB_ADDR_H */ 326