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(const union ib_gid *sgid, const union ib_gid *dgid, 115 u8 *smac, 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 void rdma_gid2ip(struct sockaddr *out, const 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 } 177 178 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 179 union ib_gid *gid) 180 { 181 struct net_device *dev; 182 struct in_device *ip4; 183 184 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 185 if (dev) { 186 ip4 = (struct in_device *)dev->ip_ptr; 187 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) 188 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, 189 (struct in6_addr *)gid); 190 dev_put(dev); 191 } 192 } 193 194 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 195 { 196 if (dev_addr->transport == RDMA_TRANSPORT_IB && 197 dev_addr->dev_type != ARPHRD_INFINIBAND) 198 iboe_addr_get_sgid(dev_addr, gid); 199 else 200 memcpy(gid, dev_addr->src_dev_addr + 201 rdma_addr_gid_offset(dev_addr), sizeof *gid); 202 } 203 204 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 205 { 206 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 207 } 208 209 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 210 { 211 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 212 } 213 214 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 215 { 216 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 217 } 218 219 static inline enum ib_mtu iboe_get_mtu(int mtu) 220 { 221 /* 222 * reduce IB headers from effective IBoE MTU. 28 stands for 223 * atomic header which is the biggest possible header after BTH 224 */ 225 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 226 227 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 228 return IB_MTU_4096; 229 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 230 return IB_MTU_2048; 231 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 232 return IB_MTU_1024; 233 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 234 return IB_MTU_512; 235 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 236 return IB_MTU_256; 237 else 238 return 0; 239 } 240 241 static inline int iboe_get_rate(struct net_device *dev) 242 { 243 struct ethtool_cmd cmd; 244 u32 speed; 245 int err; 246 247 rtnl_lock(); 248 err = __ethtool_get_settings(dev, &cmd); 249 rtnl_unlock(); 250 if (err) 251 return IB_RATE_PORT_CURRENT; 252 253 speed = ethtool_cmd_speed(&cmd); 254 if (speed >= 40000) 255 return IB_RATE_40_GBPS; 256 else if (speed >= 30000) 257 return IB_RATE_30_GBPS; 258 else if (speed >= 20000) 259 return IB_RATE_20_GBPS; 260 else if (speed >= 10000) 261 return IB_RATE_10_GBPS; 262 else 263 return IB_RATE_PORT_CURRENT; 264 } 265 266 static inline int rdma_link_local_addr(struct in6_addr *addr) 267 { 268 if (addr->s6_addr32[0] == htonl(0xfe800000) && 269 addr->s6_addr32[1] == 0) 270 return 1; 271 272 return 0; 273 } 274 275 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 276 { 277 memcpy(mac, &addr->s6_addr[8], 3); 278 memcpy(mac + 3, &addr->s6_addr[13], 3); 279 mac[0] ^= 2; 280 } 281 282 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 283 { 284 return addr->s6_addr[0] == 0xff; 285 } 286 287 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 288 { 289 int i; 290 291 mac[0] = 0x33; 292 mac[1] = 0x33; 293 for (i = 2; i < 6; ++i) 294 mac[i] = addr->s6_addr[i + 10]; 295 } 296 297 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 298 { 299 u16 vid; 300 301 vid = dgid->raw[11] << 8 | dgid->raw[12]; 302 return vid < 0x1000 ? vid : 0xffff; 303 } 304 305 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 306 { 307 return dev->priv_flags & IFF_802_1Q_VLAN ? 308 vlan_dev_real_dev(dev) : NULL; 309 } 310 311 #endif /* IB_ADDR_H */ 312