1 /*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 *
5 * This Software is licensed under one of the following licenses:
6 *
7 * 1) under the terms of the "Common Public License 1.0" a copy of which is
8 * available from the Open Source Initiative, see
9 * http://www.opensource.org/licenses/cpl.php.
10 *
11 * 2) under the terms of the "The BSD License" a copy of which is
12 * available from the Open Source Initiative, see
13 * http://www.opensource.org/licenses/bsd-license.php.
14 *
15 * 3) under the terms of the "GNU General Public License (GPL) Version 2" a
16 * copy of which is available from the Open Source Initiative, see
17 * http://www.opensource.org/licenses/gpl-license.php.
18 *
19 * Licensee has the right to choose one of the above licenses.
20 *
21 * Redistributions of source code must retain the above copyright
22 * notice and one of the license notices.
23 *
24 * Redistributions in binary form must reproduce both the above copyright
25 * notice, one of the license notices in the documentation
26 * and/or other materials provided with the distribution.
27 *
28 */
29
30 #if !defined(IB_ADDR_H)
31 #define IB_ADDR_H
32
33 #include <linux/in.h>
34 #include <linux/in6.h>
35 #include <linux/netdevice.h>
36 #include <linux/socket.h>
37 #include <rdma/ib_verbs.h>
38
39 struct rdma_addr_client {
40 atomic_t refcount;
41 struct completion comp;
42 };
43
44 /**
45 * rdma_addr_register_client - Register an address client.
46 */
47 void rdma_addr_register_client(struct rdma_addr_client *client);
48
49 /**
50 * rdma_addr_unregister_client - Deregister an address client.
51 * @client: Client object to deregister.
52 */
53 void rdma_addr_unregister_client(struct rdma_addr_client *client);
54
55 struct rdma_dev_addr {
56 unsigned char src_dev_addr[MAX_ADDR_LEN];
57 unsigned char dst_dev_addr[MAX_ADDR_LEN];
58 unsigned char broadcast[MAX_ADDR_LEN];
59 enum rdma_node_type dev_type;
60 };
61
62 /**
63 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
64 * address.
65 */
66 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
67
68 /**
69 * rdma_resolve_ip - Resolve source and destination IP addresses to
70 * RDMA hardware addresses.
71 * @client: Address client associated with request.
72 * @src_addr: An optional source address to use in the resolution. If a
73 * source address is not provided, a usable address will be returned via
74 * the callback.
75 * @dst_addr: The destination address to resolve.
76 * @addr: A reference to a data location that will receive the resolved
77 * addresses. The data location must remain valid until the callback has
78 * been invoked.
79 * @timeout_ms: Amount of time to wait for the address resolution to complete.
80 * @callback: Call invoked once address resolution has completed, timed out,
81 * or been canceled. A status of 0 indicates success.
82 * @context: User-specified context associated with the call.
83 */
84 int rdma_resolve_ip(struct rdma_addr_client *client,
85 struct sockaddr *src_addr, struct sockaddr *dst_addr,
86 struct rdma_dev_addr *addr, int timeout_ms,
87 void (*callback)(int status, struct sockaddr *src_addr,
88 struct rdma_dev_addr *addr, void *context),
89 void *context);
90
91 void rdma_addr_cancel(struct rdma_dev_addr *addr);
92
93 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
94 const unsigned char *dst_dev_addr);
95
96 static inline int ip_addr_size(struct sockaddr *addr)
97 {
98 return addr->sa_family == AF_INET6 ?
99 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
100 }
101
102 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
103 {
104 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
105 }
106
107 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
108 {
109 dev_addr->broadcast[8] = pkey >> 8;
110 dev_addr->broadcast[9] = (unsigned char) pkey;
111 }
112
113 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
114 union ib_gid *gid)
115 {
116 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
117 }
118
119 static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
120 union ib_gid *gid)
121 {
122 memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
123 }
124
125 static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
126 union ib_gid *gid)
127 {
128 memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
129 }
130
131 static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
132 union ib_gid *gid)
133 {
134 memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
135 }
136
137 static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
138 union ib_gid *gid)
139 {
140 memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
141 }
142
143 static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
144 union ib_gid *gid)
145 {
146 memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
147 }
148
149 static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
150 union ib_gid *gid)
151 {
152 memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
153 }
154
155 #endif /* IB_ADDR_H */
156
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