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/net_namespace.h> 50 51 /** 52 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 53 * @src_dev_addr: Source MAC address. 54 * @dst_dev_addr: Destination MAC address. 55 * @broadcast: Broadcast address of the device. 56 * @dev_type: The interface hardware type of the device. 57 * @bound_dev_if: An optional device interface index. 58 * @transport: The transport type used. 59 * @net: Network namespace containing the bound_dev_if net_dev. 60 * @sgid_attr: GID attribute to use for identified SGID 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 const struct ib_gid_attr *sgid_attr; 71 enum rdma_network_type network; 72 int hoplimit; 73 }; 74 75 /** 76 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 77 * address. 78 * 79 * The dev_addr->net field must be initialized. 80 */ 81 int rdma_translate_ip(const struct sockaddr *addr, 82 struct rdma_dev_addr *dev_addr); 83 84 /** 85 * rdma_resolve_ip - Resolve source and destination IP addresses to 86 * RDMA hardware addresses. 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. The net field of the addr struct must be valid. 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 * @resolve_by_gid_attr: Resolve the ip based on the GID attribute from 98 * rdma_dev_addr. 99 * @context: User-specified context associated with the call. 100 */ 101 int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr, 102 struct rdma_dev_addr *addr, unsigned long timeout_ms, 103 void (*callback)(int status, struct sockaddr *src_addr, 104 struct rdma_dev_addr *addr, void *context), 105 bool resolve_by_gid_attr, void *context); 106 107 void rdma_addr_cancel(struct rdma_dev_addr *addr); 108 109 int rdma_addr_size(const struct sockaddr *addr); 110 int rdma_addr_size_in6(struct sockaddr_in6 *addr); 111 int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr); 112 113 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 114 { 115 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 116 } 117 118 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 119 { 120 dev_addr->broadcast[8] = pkey >> 8; 121 dev_addr->broadcast[9] = (unsigned char) pkey; 122 } 123 124 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 125 union ib_gid *gid) 126 { 127 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 128 } 129 130 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 131 { 132 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 133 } 134 135 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 136 { 137 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; 138 } 139 140 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) 141 { 142 switch (addr->sa_family) { 143 case AF_INET: 144 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 145 addr)->sin_addr.s_addr, 146 (struct in6_addr *)gid); 147 break; 148 case AF_INET6: 149 *(struct in6_addr *)&gid->raw = 150 ((struct sockaddr_in6 *)addr)->sin6_addr; 151 break; 152 default: 153 return -EINVAL; 154 } 155 return 0; 156 } 157 158 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 159 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 160 { 161 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { 162 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 163 memset(out_in, 0, sizeof(*out_in)); 164 out_in->sin_family = AF_INET; 165 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 166 } else { 167 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 168 memset(out_in, 0, sizeof(*out_in)); 169 out_in->sin6_family = AF_INET6; 170 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 171 } 172 } 173 174 /* 175 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp. 176 * They are not applicable to RoCE. 177 * RoCE GIDs are derived from the IP addresses. 178 */ 179 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 180 { 181 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), 182 sizeof(*gid)); 183 } 184 185 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 186 { 187 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 188 } 189 190 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 191 { 192 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 193 } 194 195 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 196 { 197 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 198 } 199 200 static inline enum ib_mtu iboe_get_mtu(int mtu) 201 { 202 /* 203 * Reduce IB headers from effective IBoE MTU. 204 */ 205 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES + 206 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES + 207 IB_ICRC_BYTES); 208 209 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 210 return IB_MTU_4096; 211 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 212 return IB_MTU_2048; 213 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 214 return IB_MTU_1024; 215 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 216 return IB_MTU_512; 217 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 218 return IB_MTU_256; 219 else 220 return 0; 221 } 222 223 static inline int iboe_get_rate(struct net_device *dev) 224 { 225 struct ethtool_link_ksettings cmd; 226 int err; 227 228 rtnl_lock(); 229 err = __ethtool_get_link_ksettings(dev, &cmd); 230 rtnl_unlock(); 231 if (err) 232 return IB_RATE_PORT_CURRENT; 233 234 if (cmd.base.speed >= 40000) 235 return IB_RATE_40_GBPS; 236 else if (cmd.base.speed >= 30000) 237 return IB_RATE_30_GBPS; 238 else if (cmd.base.speed >= 20000) 239 return IB_RATE_20_GBPS; 240 else if (cmd.base.speed >= 10000) 241 return IB_RATE_10_GBPS; 242 else 243 return IB_RATE_PORT_CURRENT; 244 } 245 246 static inline int rdma_link_local_addr(struct in6_addr *addr) 247 { 248 if (addr->s6_addr32[0] == htonl(0xfe800000) && 249 addr->s6_addr32[1] == 0) 250 return 1; 251 252 return 0; 253 } 254 255 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 256 { 257 memcpy(mac, &addr->s6_addr[8], 3); 258 memcpy(mac + 3, &addr->s6_addr[13], 3); 259 mac[0] ^= 2; 260 } 261 262 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 263 { 264 __be32 ipv4_addr; 265 266 if (addr->s6_addr[0] == 0xff) 267 return 1; 268 269 ipv4_addr = addr->s6_addr32[3]; 270 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); 271 } 272 273 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 274 { 275 int i; 276 277 mac[0] = 0x33; 278 mac[1] = 0x33; 279 for (i = 2; i < 6; ++i) 280 mac[i] = addr->s6_addr[i + 10]; 281 } 282 283 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 284 { 285 u16 vid; 286 287 vid = dgid->raw[11] << 8 | dgid->raw[12]; 288 return vid < 0x1000 ? vid : 0xffff; 289 } 290 291 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 292 { 293 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; 294 } 295 296 #endif /* IB_ADDR_H */ 297