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 #include <net/net_namespace.h> 51 52 /** 53 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 54 * @src_dev_addr: Source MAC address. 55 * @dst_dev_addr: Destination MAC address. 56 * @broadcast: Broadcast address of the device. 57 * @dev_type: The interface hardware type of the device. 58 * @bound_dev_if: An optional device interface index. 59 * @transport: The transport type used. 60 * @net: Network namespace containing the bound_dev_if net_dev. 61 */ 62 struct rdma_dev_addr { 63 unsigned char src_dev_addr[MAX_ADDR_LEN]; 64 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 65 unsigned char broadcast[MAX_ADDR_LEN]; 66 unsigned short dev_type; 67 int bound_dev_if; 68 enum rdma_transport_type transport; 69 struct net *net; 70 enum rdma_network_type network; 71 int hoplimit; 72 }; 73 74 /** 75 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 76 * address. 77 * 78 * The dev_addr->net field must be initialized. 79 */ 80 int rdma_translate_ip(const struct sockaddr *addr, 81 struct rdma_dev_addr *dev_addr); 82 83 /** 84 * rdma_resolve_ip - Resolve source and destination IP addresses to 85 * RDMA hardware addresses. 86 * @src_addr: An optional source address to use in the resolution. If a 87 * source address is not provided, a usable address will be returned via 88 * the callback. 89 * @dst_addr: The destination address to resolve. 90 * @addr: A reference to a data location that will receive the resolved 91 * addresses. The data location must remain valid until the callback has 92 * been invoked. The net field of the addr struct must be valid. 93 * @timeout_ms: Amount of time to wait for the address resolution to complete. 94 * @callback: Call invoked once address resolution has completed, timed out, 95 * or been canceled. A status of 0 indicates success. 96 * @context: User-specified context associated with the call. 97 */ 98 int rdma_resolve_ip(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 void rdma_copy_addr(struct rdma_dev_addr *dev_addr, 107 const struct net_device *dev, 108 const unsigned char *dst_dev_addr); 109 110 int rdma_addr_size(struct sockaddr *addr); 111 int rdma_addr_size_in6(struct sockaddr_in6 *addr); 112 int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr); 113 114 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 115 { 116 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 117 } 118 119 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 120 { 121 dev_addr->broadcast[8] = pkey >> 8; 122 dev_addr->broadcast[9] = (unsigned char) pkey; 123 } 124 125 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 126 union ib_gid *gid) 127 { 128 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 129 } 130 131 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 132 { 133 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 134 } 135 136 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 137 { 138 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; 139 } 140 141 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 142 { 143 switch (addr->sa_family) { 144 case AF_INET: 145 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 146 addr)->sin_addr.s_addr, 147 (struct in6_addr *)gid); 148 break; 149 case AF_INET6: 150 *(struct in6_addr *)&gid->raw = 151 ((struct sockaddr_in6 *)addr)->sin6_addr; 152 break; 153 default: 154 return -EINVAL; 155 } 156 return 0; 157 } 158 159 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 160 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 161 { 162 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 163 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 164 memset(out_in, 0, sizeof(*out_in)); 165 out_in->sin_family = AF_INET; 166 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 167 } else { 168 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 169 memset(out_in, 0, sizeof(*out_in)); 170 out_in->sin6_family = AF_INET6; 171 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 172 } 173 } 174 175 /* 176 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp. 177 * They are not applicable to RoCE. 178 * RoCE GIDs are derived from the IP addresses. 179 */ 180 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 181 { 182 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), 183 sizeof(*gid)); 184 } 185 186 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 187 { 188 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 189 } 190 191 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 192 { 193 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 194 } 195 196 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 197 { 198 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 199 } 200 201 static inline enum ib_mtu iboe_get_mtu(int mtu) 202 { 203 /* 204 * Reduce IB headers from effective IBoE MTU. 205 */ 206 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES + 207 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES + 208 IB_ICRC_BYTES); 209 210 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 211 return IB_MTU_4096; 212 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 213 return IB_MTU_2048; 214 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 215 return IB_MTU_1024; 216 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 217 return IB_MTU_512; 218 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 219 return IB_MTU_256; 220 else 221 return 0; 222 } 223 224 static inline int iboe_get_rate(struct net_device *dev) 225 { 226 struct ethtool_link_ksettings cmd; 227 int err; 228 229 rtnl_lock(); 230 err = __ethtool_get_link_ksettings(dev, &cmd); 231 rtnl_unlock(); 232 if (err) 233 return IB_RATE_PORT_CURRENT; 234 235 if (cmd.base.speed >= 40000) 236 return IB_RATE_40_GBPS; 237 else if (cmd.base.speed >= 30000) 238 return IB_RATE_30_GBPS; 239 else if (cmd.base.speed >= 20000) 240 return IB_RATE_20_GBPS; 241 else if (cmd.base.speed >= 10000) 242 return IB_RATE_10_GBPS; 243 else 244 return IB_RATE_PORT_CURRENT; 245 } 246 247 static inline int rdma_link_local_addr(struct in6_addr *addr) 248 { 249 if (addr->s6_addr32[0] == htonl(0xfe800000) && 250 addr->s6_addr32[1] == 0) 251 return 1; 252 253 return 0; 254 } 255 256 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 257 { 258 memcpy(mac, &addr->s6_addr[8], 3); 259 memcpy(mac + 3, &addr->s6_addr[13], 3); 260 mac[0] ^= 2; 261 } 262 263 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 264 { 265 __be32 ipv4_addr; 266 267 if (addr->s6_addr[0] == 0xff) 268 return 1; 269 270 ipv4_addr = addr->s6_addr32[3]; 271 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); 272 } 273 274 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 275 { 276 int i; 277 278 mac[0] = 0x33; 279 mac[1] = 0x33; 280 for (i = 2; i < 6; ++i) 281 mac[i] = addr->s6_addr[i + 10]; 282 } 283 284 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 285 { 286 u16 vid; 287 288 vid = dgid->raw[11] << 8 | dgid->raw[12]; 289 return vid < 0x1000 ? vid : 0xffff; 290 } 291 292 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 293 { 294 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; 295 } 296 297 #endif /* IB_ADDR_H */ 298