2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #if !defined(IB_ADDR_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>
45 #include <net/if_inet6.h>
47 #include <rdma/ib_verbs.h>
48 #include <rdma/ib_pack.h>
50 #include <net/net_namespace.h>
52 struct rdma_addr_client {
54 struct completion comp;
58 * rdma_addr_register_client - Register an address client.
60 void rdma_addr_register_client(struct rdma_addr_client *client);
63 * rdma_addr_unregister_client - Deregister an address client.
64 * @client: Client object to deregister.
66 void rdma_addr_unregister_client(struct rdma_addr_client *client);
69 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
70 * @src_dev_addr: Source MAC address.
71 * @dst_dev_addr: Destination MAC address.
72 * @broadcast: Broadcast address of the device.
73 * @dev_type: The interface hardware type of the device.
74 * @bound_dev_if: An optional device interface index.
75 * @transport: The transport type used.
76 * @net: Network namespace containing the bound_dev_if net_dev.
78 struct rdma_dev_addr {
79 unsigned char src_dev_addr[MAX_ADDR_LEN];
80 unsigned char dst_dev_addr[MAX_ADDR_LEN];
81 unsigned char broadcast[MAX_ADDR_LEN];
82 unsigned short dev_type;
84 enum rdma_transport_type transport;
89 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
92 * The dev_addr->net field must be initialized.
94 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
98 * rdma_resolve_ip - Resolve source and destination IP addresses to
99 * RDMA hardware addresses.
100 * @client: Address client associated with request.
101 * @src_addr: An optional source address to use in the resolution. If a
102 * source address is not provided, a usable address will be returned via
104 * @dst_addr: The destination address to resolve.
105 * @addr: A reference to a data location that will receive the resolved
106 * addresses. The data location must remain valid until the callback has
107 * been invoked. The net field of the addr struct must be valid.
108 * @timeout_ms: Amount of time to wait for the address resolution to complete.
109 * @callback: Call invoked once address resolution has completed, timed out,
110 * or been canceled. A status of 0 indicates success.
111 * @context: User-specified context associated with the call.
113 int rdma_resolve_ip(struct rdma_addr_client *client,
114 struct sockaddr *src_addr, struct sockaddr *dst_addr,
115 struct rdma_dev_addr *addr, int timeout_ms,
116 void (*callback)(int status, struct sockaddr *src_addr,
117 struct rdma_dev_addr *addr, void *context),
120 void rdma_addr_cancel(struct rdma_dev_addr *addr);
122 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
123 const unsigned char *dst_dev_addr);
125 int rdma_addr_size(struct sockaddr *addr);
126 int rdma_addr_size_in6(struct sockaddr_in6 *addr);
127 int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
129 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
130 int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgid,
131 u8 *smac, u16 *vlan_id, int if_index);
133 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
135 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
138 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
140 dev_addr->broadcast[8] = pkey >> 8;
141 dev_addr->broadcast[9] = (unsigned char) pkey;
144 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
147 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
150 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
152 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
155 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
157 return dev->priv_flags & IFF_802_1Q_VLAN ?
158 vlan_dev_vlan_id(dev) : 0xffff;
161 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
163 switch (addr->sa_family) {
165 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
166 addr)->sin_addr.s_addr,
167 (struct in6_addr *)gid);
170 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
178 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
179 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
181 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
182 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
183 memset(out_in, 0, sizeof(*out_in));
184 out_in->sin_family = AF_INET;
185 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
187 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
188 memset(out_in, 0, sizeof(*out_in));
189 out_in->sin6_family = AF_INET6;
190 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
194 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
197 struct net_device *dev;
198 struct in_device *ip4;
200 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
202 ip4 = in_dev_get(dev);
203 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
204 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
205 (struct in6_addr *)gid);
214 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
216 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
217 dev_addr->dev_type != ARPHRD_INFINIBAND)
218 iboe_addr_get_sgid(dev_addr, gid);
220 memcpy(gid, dev_addr->src_dev_addr +
221 rdma_addr_gid_offset(dev_addr), sizeof *gid);
224 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
226 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
229 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
231 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
234 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
236 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
239 static inline enum ib_mtu iboe_get_mtu(int mtu)
242 * reduce IB headers from effective IBoE MTU. 28 stands for
243 * atomic header which is the biggest possible header after BTH
245 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
247 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
249 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
251 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
253 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
255 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
261 static inline int iboe_get_rate(struct net_device *dev)
263 struct ethtool_cmd cmd;
268 err = __ethtool_get_settings(dev, &cmd);
271 return IB_RATE_PORT_CURRENT;
273 speed = ethtool_cmd_speed(&cmd);
275 return IB_RATE_40_GBPS;
276 else if (speed >= 30000)
277 return IB_RATE_30_GBPS;
278 else if (speed >= 20000)
279 return IB_RATE_20_GBPS;
280 else if (speed >= 10000)
281 return IB_RATE_10_GBPS;
283 return IB_RATE_PORT_CURRENT;
286 static inline int rdma_link_local_addr(struct in6_addr *addr)
288 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
289 addr->s6_addr32[1] == 0)
295 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
297 memcpy(mac, &addr->s6_addr[8], 3);
298 memcpy(mac + 3, &addr->s6_addr[13], 3);
302 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
304 return addr->s6_addr[0] == 0xff;
307 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
313 for (i = 2; i < 6; ++i)
314 mac[i] = addr->s6_addr[i + 10];
317 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
321 vid = dgid->raw[11] << 8 | dgid->raw[12];
322 return vid < 0x1000 ? vid : 0xffff;
325 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
327 return dev->priv_flags & IFF_802_1Q_VLAN ?
328 vlan_dev_real_dev(dev) : NULL;
331 #endif /* IB_ADDR_H */