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 * @sgid_attr: GID attribute to use for identified SGID 62 */ 63 struct rdma_dev_addr { 64 unsigned char src_dev_addr[MAX_ADDR_LEN]; 65 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 66 unsigned char broadcast[MAX_ADDR_LEN]; 67 unsigned short dev_type; 68 int bound_dev_if; 69 enum rdma_transport_type transport; 70 struct net *net; 71 const struct ib_gid_attr *sgid_attr; 72 enum rdma_network_type network; 73 int hoplimit; 74 }; 75 76 /** 77 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 78 * address. 79 * 80 * The dev_addr->net field must be initialized. 81 */ 82 int rdma_translate_ip(const struct sockaddr *addr, 83 struct rdma_dev_addr *dev_addr); 84 85 /** 86 * rdma_resolve_ip - Resolve source and destination IP addresses to 87 * RDMA hardware addresses. 88 * @src_addr: An optional source address to use in the resolution. If a 89 * source address is not provided, a usable address will be returned via 90 * the callback. 91 * @dst_addr: The destination address to resolve. 92 * @addr: A reference to a data location that will receive the resolved 93 * addresses. The data location must remain valid until the callback has 94 * been invoked. The net field of the addr struct must be valid. 95 * @timeout_ms: Amount of time to wait for the address resolution to complete. 96 * @callback: Call invoked once address resolution has completed, timed out, 97 * or been canceled. A status of 0 indicates success. 98 * @context: User-specified context associated with the call. 99 */ 100 int rdma_resolve_ip(struct sockaddr *src_addr, const 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 void rdma_copy_addr(struct rdma_dev_addr *dev_addr, 109 const struct net_device *dev, 110 const unsigned char *dst_dev_addr); 111 112 int rdma_addr_size(const struct sockaddr *addr); 113 int rdma_addr_size_in6(struct sockaddr_in6 *addr); 114 int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr); 115 116 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 117 { 118 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 119 } 120 121 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 122 { 123 dev_addr->broadcast[8] = pkey >> 8; 124 dev_addr->broadcast[9] = (unsigned char) pkey; 125 } 126 127 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 128 union ib_gid *gid) 129 { 130 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 131 } 132 133 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 134 { 135 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 136 } 137 138 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 139 { 140 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; 141 } 142 143 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 144 { 145 switch (addr->sa_family) { 146 case AF_INET: 147 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 148 addr)->sin_addr.s_addr, 149 (struct in6_addr *)gid); 150 break; 151 case AF_INET6: 152 *(struct in6_addr *)&gid->raw = 153 ((struct sockaddr_in6 *)addr)->sin6_addr; 154 break; 155 default: 156 return -EINVAL; 157 } 158 return 0; 159 } 160 161 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 162 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 163 { 164 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 165 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 166 memset(out_in, 0, sizeof(*out_in)); 167 out_in->sin_family = AF_INET; 168 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 169 } else { 170 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 171 memset(out_in, 0, sizeof(*out_in)); 172 out_in->sin6_family = AF_INET6; 173 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 174 } 175 } 176 177 /* 178 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp. 179 * They are not applicable to RoCE. 180 * RoCE GIDs are derived from the IP addresses. 181 */ 182 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 183 { 184 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), 185 sizeof(*gid)); 186 } 187 188 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 189 { 190 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 191 } 192 193 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 194 { 195 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 196 } 197 198 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 199 { 200 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 201 } 202 203 static inline enum ib_mtu iboe_get_mtu(int mtu) 204 { 205 /* 206 * Reduce IB headers from effective IBoE MTU. 207 */ 208 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES + 209 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES + 210 IB_ICRC_BYTES); 211 212 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 213 return IB_MTU_4096; 214 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 215 return IB_MTU_2048; 216 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 217 return IB_MTU_1024; 218 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 219 return IB_MTU_512; 220 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 221 return IB_MTU_256; 222 else 223 return 0; 224 } 225 226 static inline int iboe_get_rate(struct net_device *dev) 227 { 228 struct ethtool_link_ksettings cmd; 229 int err; 230 231 rtnl_lock(); 232 err = __ethtool_get_link_ksettings(dev, &cmd); 233 rtnl_unlock(); 234 if (err) 235 return IB_RATE_PORT_CURRENT; 236 237 if (cmd.base.speed >= 40000) 238 return IB_RATE_40_GBPS; 239 else if (cmd.base.speed >= 30000) 240 return IB_RATE_30_GBPS; 241 else if (cmd.base.speed >= 20000) 242 return IB_RATE_20_GBPS; 243 else if (cmd.base.speed >= 10000) 244 return IB_RATE_10_GBPS; 245 else 246 return IB_RATE_PORT_CURRENT; 247 } 248 249 static inline int rdma_link_local_addr(struct in6_addr *addr) 250 { 251 if (addr->s6_addr32[0] == htonl(0xfe800000) && 252 addr->s6_addr32[1] == 0) 253 return 1; 254 255 return 0; 256 } 257 258 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 259 { 260 memcpy(mac, &addr->s6_addr[8], 3); 261 memcpy(mac + 3, &addr->s6_addr[13], 3); 262 mac[0] ^= 2; 263 } 264 265 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 266 { 267 __be32 ipv4_addr; 268 269 if (addr->s6_addr[0] == 0xff) 270 return 1; 271 272 ipv4_addr = addr->s6_addr32[3]; 273 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); 274 } 275 276 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 277 { 278 int i; 279 280 mac[0] = 0x33; 281 mac[1] = 0x33; 282 for (i = 2; i < 6; ++i) 283 mac[i] = addr->s6_addr[i + 10]; 284 } 285 286 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 287 { 288 u16 vid; 289 290 vid = dgid->raw[11] << 8 | dgid->raw[12]; 291 return vid < 0x1000 ? vid : 0xffff; 292 } 293 294 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 295 { 296 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; 297 } 298 299 #endif /* IB_ADDR_H */ 300