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 51 struct rdma_addr_client { 52 atomic_t refcount; 53 struct completion comp; 54 }; 55 56 /** 57 * rdma_addr_register_client - Register an address client. 58 */ 59 void rdma_addr_register_client(struct rdma_addr_client *client); 60 61 /** 62 * rdma_addr_unregister_client - Deregister an address client. 63 * @client: Client object to deregister. 64 */ 65 void rdma_addr_unregister_client(struct rdma_addr_client *client); 66 67 struct rdma_dev_addr { 68 unsigned char src_dev_addr[MAX_ADDR_LEN]; 69 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 70 unsigned char broadcast[MAX_ADDR_LEN]; 71 unsigned short dev_type; 72 int bound_dev_if; 73 enum rdma_transport_type transport; 74 }; 75 76 /** 77 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 78 * address. 79 */ 80 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, 81 u16 *vlan_id); 82 83 /** 84 * rdma_resolve_ip - Resolve source and destination IP addresses to 85 * RDMA hardware addresses. 86 * @client: Address client associated with request. 87 * @src_addr: An optional source address to use in the resolution. If a 88 * source address is not provided, a usable address will be returned via 89 * the callback. 90 * @dst_addr: The destination address to resolve. 91 * @addr: A reference to a data location that will receive the resolved 92 * addresses. The data location must remain valid until the callback has 93 * been invoked. 94 * @timeout_ms: Amount of time to wait for the address resolution to complete. 95 * @callback: Call invoked once address resolution has completed, timed out, 96 * or been canceled. A status of 0 indicates success. 97 * @context: User-specified context associated with the call. 98 */ 99 int rdma_resolve_ip(struct rdma_addr_client *client, 100 struct sockaddr *src_addr, struct sockaddr *dst_addr, 101 struct rdma_dev_addr *addr, int timeout_ms, 102 void (*callback)(int status, struct sockaddr *src_addr, 103 struct rdma_dev_addr *addr, void *context), 104 void *context); 105 106 void rdma_addr_cancel(struct rdma_dev_addr *addr); 107 108 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 109 const unsigned char *dst_dev_addr); 110 111 int rdma_addr_size(struct sockaddr *addr); 112 113 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 114 int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac, 115 u16 *vlan_id); 116 117 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 118 { 119 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 120 } 121 122 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 123 { 124 dev_addr->broadcast[8] = pkey >> 8; 125 dev_addr->broadcast[9] = (unsigned char) pkey; 126 } 127 128 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 129 union ib_gid *gid) 130 { 131 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 132 } 133 134 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 135 { 136 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 137 } 138 139 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 140 { 141 return dev->priv_flags & IFF_802_1Q_VLAN ? 142 vlan_dev_vlan_id(dev) : 0xffff; 143 } 144 145 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 146 { 147 switch (addr->sa_family) { 148 case AF_INET: 149 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 150 addr)->sin_addr.s_addr, 151 (struct in6_addr *)gid); 152 break; 153 case AF_INET6: 154 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); 155 break; 156 default: 157 return -EINVAL; 158 } 159 return 0; 160 } 161 162 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 163 static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid) 164 { 165 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 166 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 167 memset(out_in, 0, sizeof(*out_in)); 168 out_in->sin_family = AF_INET; 169 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 170 } else { 171 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 172 memset(out_in, 0, sizeof(*out_in)); 173 out_in->sin6_family = AF_INET6; 174 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 175 } 176 return 0; 177 } 178 179 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 180 union ib_gid *gid) 181 { 182 struct net_device *dev; 183 struct in_device *ip4; 184 185 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 186 if (dev) { 187 ip4 = (struct in_device *)dev->ip_ptr; 188 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) 189 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, 190 (struct in6_addr *)gid); 191 dev_put(dev); 192 } 193 } 194 195 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 196 { 197 if (dev_addr->transport == RDMA_TRANSPORT_IB && 198 dev_addr->dev_type != ARPHRD_INFINIBAND) 199 iboe_addr_get_sgid(dev_addr, gid); 200 else 201 memcpy(gid, dev_addr->src_dev_addr + 202 rdma_addr_gid_offset(dev_addr), sizeof *gid); 203 } 204 205 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 206 { 207 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 208 } 209 210 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 211 { 212 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 213 } 214 215 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 216 { 217 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 218 } 219 220 static inline enum ib_mtu iboe_get_mtu(int mtu) 221 { 222 /* 223 * reduce IB headers from effective IBoE MTU. 28 stands for 224 * atomic header which is the biggest possible header after BTH 225 */ 226 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 227 228 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 229 return IB_MTU_4096; 230 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 231 return IB_MTU_2048; 232 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 233 return IB_MTU_1024; 234 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 235 return IB_MTU_512; 236 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 237 return IB_MTU_256; 238 else 239 return 0; 240 } 241 242 static inline int iboe_get_rate(struct net_device *dev) 243 { 244 struct ethtool_cmd cmd; 245 u32 speed; 246 int err; 247 248 rtnl_lock(); 249 err = __ethtool_get_settings(dev, &cmd); 250 rtnl_unlock(); 251 if (err) 252 return IB_RATE_PORT_CURRENT; 253 254 speed = ethtool_cmd_speed(&cmd); 255 if (speed >= 40000) 256 return IB_RATE_40_GBPS; 257 else if (speed >= 30000) 258 return IB_RATE_30_GBPS; 259 else if (speed >= 20000) 260 return IB_RATE_20_GBPS; 261 else if (speed >= 10000) 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 rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 289 { 290 int i; 291 292 mac[0] = 0x33; 293 mac[1] = 0x33; 294 for (i = 2; i < 6; ++i) 295 mac[i] = addr->s6_addr[i + 10]; 296 } 297 298 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 299 { 300 u16 vid; 301 302 vid = dgid->raw[11] << 8 | dgid->raw[12]; 303 return vid < 0x1000 ? vid : 0xffff; 304 } 305 306 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 307 { 308 return dev->priv_flags & IFF_802_1Q_VLAN ? 309 vlan_dev_real_dev(dev) : NULL; 310 } 311 312 #endif /* IB_ADDR_H */ 313