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 <linux/if_vlan.h> 43 #include <rdma/ib_verbs.h> 44 #include <rdma/ib_pack.h> 45 46 struct rdma_addr_client { 47 atomic_t refcount; 48 struct completion comp; 49 }; 50 51 /** 52 * rdma_addr_register_client - Register an address client. 53 */ 54 void rdma_addr_register_client(struct rdma_addr_client *client); 55 56 /** 57 * rdma_addr_unregister_client - Deregister an address client. 58 * @client: Client object to deregister. 59 */ 60 void rdma_addr_unregister_client(struct rdma_addr_client *client); 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 }; 70 71 /** 72 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 73 * address. 74 */ 75 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr); 76 77 /** 78 * rdma_resolve_ip - Resolve source and destination IP addresses to 79 * RDMA hardware addresses. 80 * @client: Address client associated with request. 81 * @src_addr: An optional source address to use in the resolution. If a 82 * source address is not provided, a usable address will be returned via 83 * the callback. 84 * @dst_addr: The destination address to resolve. 85 * @addr: A reference to a data location that will receive the resolved 86 * addresses. The data location must remain valid until the callback has 87 * been invoked. 88 * @timeout_ms: Amount of time to wait for the address resolution to complete. 89 * @callback: Call invoked once address resolution has completed, timed out, 90 * or been canceled. A status of 0 indicates success. 91 * @context: User-specified context associated with the call. 92 */ 93 int rdma_resolve_ip(struct rdma_addr_client *client, 94 struct sockaddr *src_addr, struct sockaddr *dst_addr, 95 struct rdma_dev_addr *addr, int timeout_ms, 96 void (*callback)(int status, struct sockaddr *src_addr, 97 struct rdma_dev_addr *addr, void *context), 98 void *context); 99 100 void rdma_addr_cancel(struct rdma_dev_addr *addr); 101 102 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 103 const unsigned char *dst_dev_addr); 104 105 static inline int ip_addr_size(struct sockaddr *addr) 106 { 107 return addr->sa_family == AF_INET6 ? 108 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); 109 } 110 111 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 112 { 113 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 114 } 115 116 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 117 { 118 dev_addr->broadcast[8] = pkey >> 8; 119 dev_addr->broadcast[9] = (unsigned char) pkey; 120 } 121 122 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 123 union ib_gid *gid) 124 { 125 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 126 } 127 128 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 129 { 130 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 131 } 132 133 static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid) 134 { 135 memset(gid->raw, 0, 16); 136 *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000); 137 if (vid < 0x1000) { 138 gid->raw[12] = vid & 0xff; 139 gid->raw[11] = vid >> 8; 140 } else { 141 gid->raw[12] = 0xfe; 142 gid->raw[11] = 0xff; 143 } 144 memcpy(gid->raw + 13, mac + 3, 3); 145 memcpy(gid->raw + 8, mac, 3); 146 gid->raw[8] ^= 2; 147 } 148 149 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 150 { 151 return dev->priv_flags & IFF_802_1Q_VLAN ? 152 vlan_dev_vlan_id(dev) : 0xffff; 153 } 154 155 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 156 union ib_gid *gid) 157 { 158 struct net_device *dev; 159 u16 vid = 0xffff; 160 161 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 162 if (dev) { 163 vid = rdma_vlan_dev_vlan_id(dev); 164 dev_put(dev); 165 } 166 167 iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid); 168 } 169 170 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 171 { 172 if (dev_addr->transport == RDMA_TRANSPORT_IB && 173 dev_addr->dev_type != ARPHRD_INFINIBAND) 174 iboe_addr_get_sgid(dev_addr, gid); 175 else 176 memcpy(gid, dev_addr->src_dev_addr + 177 rdma_addr_gid_offset(dev_addr), sizeof *gid); 178 } 179 180 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 181 { 182 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 183 } 184 185 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 186 { 187 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 188 } 189 190 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 191 { 192 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 193 } 194 195 static inline enum ib_mtu iboe_get_mtu(int mtu) 196 { 197 /* 198 * reduce IB headers from effective IBoE MTU. 28 stands for 199 * atomic header which is the biggest possible header after BTH 200 */ 201 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 202 203 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 204 return IB_MTU_4096; 205 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 206 return IB_MTU_2048; 207 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 208 return IB_MTU_1024; 209 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 210 return IB_MTU_512; 211 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 212 return IB_MTU_256; 213 else 214 return 0; 215 } 216 217 static inline int iboe_get_rate(struct net_device *dev) 218 { 219 struct ethtool_cmd cmd; 220 u32 speed; 221 222 if (dev_ethtool_get_settings(dev, &cmd)) 223 return IB_RATE_PORT_CURRENT; 224 225 speed = ethtool_cmd_speed(&cmd); 226 if (speed >= 40000) 227 return IB_RATE_40_GBPS; 228 else if (speed >= 30000) 229 return IB_RATE_30_GBPS; 230 else if (speed >= 20000) 231 return IB_RATE_20_GBPS; 232 else if (speed >= 10000) 233 return IB_RATE_10_GBPS; 234 else 235 return IB_RATE_PORT_CURRENT; 236 } 237 238 static inline int rdma_link_local_addr(struct in6_addr *addr) 239 { 240 if (addr->s6_addr32[0] == htonl(0xfe800000) && 241 addr->s6_addr32[1] == 0) 242 return 1; 243 244 return 0; 245 } 246 247 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 248 { 249 memcpy(mac, &addr->s6_addr[8], 3); 250 memcpy(mac + 3, &addr->s6_addr[13], 3); 251 mac[0] ^= 2; 252 } 253 254 static inline int rdma_is_multicast_addr(struct in6_addr *addr) 255 { 256 return addr->s6_addr[0] == 0xff; 257 } 258 259 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 260 { 261 int i; 262 263 mac[0] = 0x33; 264 mac[1] = 0x33; 265 for (i = 2; i < 6; ++i) 266 mac[i] = addr->s6_addr[i + 10]; 267 } 268 269 static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 270 { 271 u16 vid; 272 273 vid = dgid->raw[11] << 8 | dgid->raw[12]; 274 return vid < 0x1000 ? vid : 0xffff; 275 } 276 277 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 278 { 279 return dev->priv_flags & IFF_802_1Q_VLAN ? 280 vlan_dev_real_dev(dev) : 0; 281 } 282 283 #endif /* IB_ADDR_H */ 284