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