blob: c533d6c7903f0990ffa489581d0011bc5f094e1f [file] [log] [blame]
Roland Dreierf7c6a7b2007-03-04 16:15:11 -08001/*
2 * Copyright (c) 2007 Cisco Systems. 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 IB_UMEM_H
34#define IB_UMEM_H
35
36#include <linux/list.h>
37#include <linux/scatterlist.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040038#include <linux/workqueue.h>
Roland Dreierf7c6a7b2007-03-04 16:15:11 -080039
40struct ib_ucontext;
41
42struct ib_umem {
43 struct ib_ucontext *context;
44 size_t length;
45 int offset;
46 int page_size;
47 int writable;
48 struct list_head chunk_list;
Roland Dreier1bf66a32007-04-18 20:20:28 -070049 struct work_struct work;
50 struct mm_struct *mm;
51 unsigned long diff;
Roland Dreierf7c6a7b2007-03-04 16:15:11 -080052};
53
54struct ib_umem_chunk {
55 struct list_head list;
56 int nents;
57 int nmap;
58 struct scatterlist page_list[0];
59};
60
61#ifdef CONFIG_INFINIBAND_USER_MEM
62
63struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
64 size_t size, int access);
65void ib_umem_release(struct ib_umem *umem);
66int ib_umem_page_count(struct ib_umem *umem);
67
68#else /* CONFIG_INFINIBAND_USER_MEM */
69
70#include <linux/err.h>
71
72static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
73 unsigned long addr, size_t size,
74 int access) {
75 return ERR_PTR(-EINVAL);
76}
77static inline void ib_umem_release(struct ib_umem *umem) { }
78static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
79
80#endif /* CONFIG_INFINIBAND_USER_MEM */
81
82#endif /* IB_UMEM_H */