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/socket.h> 42 #include <rdma/ib_verbs.h> 43 #include <rdma/ib_pack.h> 44 #include <linux/ethtool.h> 45 #include <linux/if_vlan.h> 46 47 struct rdma_addr_client { 48 atomic_t refcount; 49 struct completion comp; 50 }; 51 52 /** 53 * rdma_addr_register_client - Register an address client. 54 */ 55 void rdma_addr_register_client(struct rdma_addr_client *client); 56 57 /** 58 * rdma_addr_unregister_client - Deregister an address client. 59 * @client: Client object to deregister. 60 */ 61 void rdma_addr_unregister_client(struct rdma_addr_client *client); 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 }; 71 72 /** 73 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 74 * address. 75 */ 76 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr); 77 78 /** 79 * rdma_resolve_ip - Resolve source and destination IP addresses to 80 * RDMA hardware addresses. 81 * @client: Address client associated with request. 82 * @src_addr: An optional source address to use in the resolution. If a 83 * source address is not provided, a usable address will be returned via 84 * the callback. 85 * @dst_addr: The destination address to resolve. 86 * @addr: A reference to a data location that will receive the resolved 87 * addresses. The data location must remain valid until the callback has 88 * been invoked. 89 * @timeout_ms: Amount of time to wait for the address resolution to complete. 90 * @callback: Call invoked once address resolution has completed, timed out, 91 * or been canceled. A status of 0 indicates success. 92 * @context: User-specified context associated with the call. 93 */ 94 int rdma_resolve_ip(struct rdma_addr_client *client, 95 struct sockaddr *src_addr, struct sockaddr *dst_addr, 96 struct rdma_dev_addr *addr, int timeout_ms, 97 void (*callback)(int status, struct sockaddr *src_addr, 98 struct rdma_dev_addr *addr, void *context), 99 void *context); 100 101 void rdma_addr_cancel(struct rdma_dev_addr *addr); 102 103 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 104 const unsigned char *dst_dev_addr); 105 106 static inline int ip_addr_size(struct sockaddr *addr) 107 { 108 return addr->sa_family == AF_INET6 ? 109 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); 110 } 111 112 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 113 { 114 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 115 } 116 117 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 118 { 119 dev_addr->broadcast[8] = pkey >> 8; 120 dev_addr->broadcast[9] = (unsigned char) pkey; 121 } 122 123 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 124 union ib_gid *gid) 125 { 126 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 127 } 128 129 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 130 { 131 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 132 } 133 134 static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid) 135 { 136 memset(gid->raw, 0, 16); 137 *((u32 *)gid->raw) = cpu_to_be32(0xfe800000); 138 if (vid < 0x1000) { 139 gid->raw[12] = vid & 0xff; 140 gid->raw[11] = vid >> 8; 141 } else { 142 gid->raw[12] = 0xfe; 143 gid->raw[11] = 0xff; 144 } 145 146 memcpy(gid->raw + 13, mac + 3, 3); 147 memcpy(gid->raw + 8, mac, 3); 148 gid->raw[8] ^= 2; 149 } 150 151 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 152 { 153 #ifdef __linux__ 154 return dev->priv_flags & IFF_802_1Q_VLAN ? 155 vlan_dev_vlan_id(dev) : 0xffff; 156 #else 157 uint16_t tag; 158 159 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 160 return 0xffff; 161 return tag; 162 #endif 163 } 164 165 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 166 union ib_gid *gid) 167 { 168 struct net_device *dev; 169 u16 vid = 0xffff; 170 171 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 172 if (dev) { 173 vid = rdma_vlan_dev_vlan_id(dev); 174 dev_put(dev); 175 } 176 177 iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid); 178 } 179 180 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 181 { 182 if (dev_addr->transport == RDMA_TRANSPORT_IB && 183 dev_addr->dev_type != ARPHRD_INFINIBAND) 184 iboe_addr_get_sgid(dev_addr, gid); 185 else 186 memcpy(gid, dev_addr->src_dev_addr + 187 rdma_addr_gid_offset(dev_addr), sizeof *gid); 188 } 189 190 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 191 { 192 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 193 } 194 195 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 196 { 197 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 198 } 199 200 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 201 { 202 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 203 } 204 205 static inline enum ib_mtu iboe_get_mtu(int mtu) 206 { 207 /* 208 * reduce IB headers from effective IBoE MTU. 28 stands for 209 * atomic header which is the biggest possible header after BTH 210 */ 211 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 212 213 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 214 return IB_MTU_4096; 215 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 216 return IB_MTU_2048; 217 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 218 return IB_MTU_1024; 219 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 220 return IB_MTU_512; 221 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 222 return IB_MTU_256; 223 else 224 return 0; 225 } 226 227 #ifdef __linux__ 228 static inline int iboe_get_rate(struct net_device *dev) 229 { 230 struct ethtool_cmd cmd; 231 232 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings || 233 dev->ethtool_ops->get_settings(dev, &cmd)) 234 return IB_RATE_PORT_CURRENT; 235 236 if (cmd.speed >= 40000) 237 return IB_RATE_40_GBPS; 238 else if (cmd.speed >= 30000) 239 return IB_RATE_30_GBPS; 240 else if (cmd.speed >= 20000) 241 return IB_RATE_20_GBPS; 242 else if (cmd.speed >= 10000) 243 return IB_RATE_10_GBPS; 244 else 245 return IB_RATE_PORT_CURRENT; 246 } 247 #else 248 static inline int iboe_get_rate(struct net_device *dev) 249 { 250 uintmax_t baudrate; 251 int exp; 252 253 baudrate = dev->if_baudrate; 254 for (exp = dev->if_baudrate_pf; exp > 0; exp--) 255 baudrate *= 10; 256 if (baudrate >= IF_Gbps(40)) 257 return IB_RATE_40_GBPS; 258 else if (baudrate >= IF_Gbps(30)) 259 return IB_RATE_30_GBPS; 260 else if (baudrate >= IF_Gbps(20)) 261 return IB_RATE_20_GBPS; 262 else if (baudrate >= IF_Gbps(10)) 263 return IB_RATE_10_GBPS; 264 else 265 return IB_RATE_PORT_CURRENT; 266 } 267 #endif 268 269 static inline int rdma_link_local_addr(struct in6_addr *addr) 270 { 271 if (addr->s6_addr32[0] == cpu_to_be32(0xfe800000) && 272 addr->s6_addr32[1] == 0) 273 return 1; 274 275 return 0; 276 } 277 278 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 279 { 280 memcpy(mac, &addr->s6_addr[8], 3); 281 memcpy(mac + 3, &addr->s6_addr[13], 3); 282 mac[0] ^= 2; 283 } 284 285 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 286 { 287 return addr->s6_addr[0] == 0xff; 288 } 289 290 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 291 { 292 int i; 293 294 mac[0] = 0x33; 295 mac[1] = 0x33; 296 for (i = 2; i < 6; ++i) 297 mac[i] = addr->s6_addr[i + 10]; 298 } 299 300 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 301 { 302 u16 vid; 303 304 vid = dgid->raw[11] << 8 | dgid->raw[12]; 305 return vid < 0x1000 ? vid : 0xffff; 306 } 307 308 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 309 { 310 #ifdef __linux__ 311 return dev->priv_flags & IFF_802_1Q_VLAN ? 312 vlan_dev_real_dev(dev) : 0; 313 #else 314 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 315 #endif 316 } 317 318 #endif /* IB_ADDR_H */ 319