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