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/netdevice.h>
40 #include <linux/socket.h>
41 #include <rdma/ib_verbs.h>
42
43 struct rdma_addr_client {
44 atomic_t refcount;
45 struct completion comp;
46 };
47
48 /**
49 * rdma_addr_register_client - Register an address client.
50 */
51 void rdma_addr_register_client(struct rdma_addr_client *client);
52
53 /**
54 * rdma_addr_unregister_client - Deregister an address client.
55 * @client: Client object to deregister.
56 */
57 void rdma_addr_unregister_client(struct rdma_addr_client *client);
58
59 struct rdma_dev_addr {
60 unsigned char src_dev_addr[MAX_ADDR_LEN];
61 unsigned char dst_dev_addr[MAX_ADDR_LEN];
62 unsigned char broadcast[MAX_ADDR_LEN];
63 enum rdma_node_type dev_type;
64 struct net_device *src_dev;
65 };
66
67 /**
68 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
69 * address.
70 */
71 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
72
73 /**
74 * rdma_resolve_ip - Resolve source and destination IP addresses to
75 * RDMA hardware addresses.
76 * @client: Address client associated with request.
77 * @src_addr: An optional source address to use in the resolution. If a
78 * source address is not provided, a usable address will be returned via
79 * the callback.
80 * @dst_addr: The destination address to resolve.
81 * @addr: A reference to a data location that will receive the resolved
82 * addresses. The data location must remain valid until the callback has
83 * been invoked.
84 * @timeout_ms: Amount of time to wait for the address resolution to complete.
85 * @callback: Call invoked once address resolution has completed, timed out,
86 * or been canceled. A status of 0 indicates success.
87 * @context: User-specified context associated with the call.
88 */
89 int rdma_resolve_ip(struct rdma_addr_client *client,
90 struct sockaddr *src_addr, struct sockaddr *dst_addr,
91 struct rdma_dev_addr *addr, int timeout_ms,
92 void (*callback)(int status, struct sockaddr *src_addr,
93 struct rdma_dev_addr *addr, void *context),
94 void *context);
95
96 void rdma_addr_cancel(struct rdma_dev_addr *addr);
97
98 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
99 const unsigned char *dst_dev_addr);
100
101 static inline int ip_addr_size(struct sockaddr *addr)
102 {
103 return addr->sa_family == AF_INET6 ?
104 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
105 }
106
107 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
108 {
109 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
110 }
111
112 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
113 {
114 dev_addr->broadcast[8] = pkey >> 8;
115 dev_addr->broadcast[9] = (unsigned char) pkey;
116 }
117
118 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
119 union ib_gid *gid)
120 {
121 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
122 }
123
124 static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
125 union ib_gid *gid)
126 {
127 memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
128 }
129
130 static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
131 union ib_gid *gid)
132 {
133 memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
134 }
135
136 static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
137 union ib_gid *gid)
138 {
139 memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
140 }
141
142 static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
143 union ib_gid *gid)
144 {
145 memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
146 }
147
148 static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
149 union ib_gid *gid)
150 {
151 memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
152 }
153
154 static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
155 union ib_gid *gid)
156 {
157 memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
158 }
159
160 #endif /* IB_ADDR_H */
161
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