1/*
2 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#ifndef KERN_ABI_H
34#define KERN_ABI_H
35
36#include <linux/types.h>
37
38/*
39 * Increment this value if any changes that break userspace ABI
40 * compatibility are made.
41 */
42#define IB_USER_VERBS_ABI_VERSION	1
43
44enum {
45	IB_USER_VERBS_CMD_GET_CONTEXT,
46	IB_USER_VERBS_CMD_GET_EVENT_FDS,
47	IB_USER_VERBS_CMD_ALLOC_PD,
48	IB_USER_VERBS_CMD_DEALLOC_PD,
49	IB_USER_VERBS_CMD_REG_MR,
50	IB_USER_VERBS_CMD_DEREG_MR
51};
52
53/*
54 * Make sure that all structs defined in this file remain laid out so
55 * that they pack the same way on 32-bit and 64-bit architectures (to
56 * avoid incompatibility between 32-bit userspace and 64-bit kernels).
57 * In particular do not use pointer types -- pass pointers in __u64
58 * instead.
59 */
60
61struct ibv_kern_async_event {
62	__u32 event_type;
63	__u32 element;
64};
65
66struct ibv_comp_event {
67	__u32 cq_handle;
68};
69
70/*
71 * All commands from userspace should start with a __u32 command field
72 * followed by __u16 in_words and out_words fields (which give the
73 * length of the command block and response buffer if any in 32-bit
74 * words).  The kernel driver will read these fields first and read
75 * the rest of the command struct based on these value.
76 */
77
78struct ibv_get_context {
79	__u32 command;
80	__u16 in_words;
81	__u16 out_words;
82	__u64 response;
83};
84
85struct ibv_get_context_resp {
86	__u32 num_cq_events;
87};
88
89struct ibv_get_event_fds {
90	__u32 command;
91	__u16 in_words;
92	__u16 out_words;
93	__u64 response;
94};
95
96struct ibv_get_event_fds_resp {
97	__u32 async_fd;
98	__u32 cq_fd[1];
99};
100
101#endif /* KERN_ABI_H */
102