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1 | /* |
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> |
38 | #include <linux/workqueue.h> |
39 | |
40 | struct ib_ucontext; |
41 | |
42 | struct ib_umem { |
43 | struct ib_ucontext *context; |
44 | size_t length; |
45 | int offset; |
46 | int page_size; |
47 | int writable; |
48 | int hugetlb; |
49 | struct list_head chunk_list; |
50 | struct work_struct work; |
51 | struct mm_struct *mm; |
52 | unsigned long diff; |
53 | }; |
54 | |
55 | struct ib_umem_chunk { |
56 | struct list_head list; |
57 | int nents; |
58 | int nmap; |
59 | struct scatterlist page_list[0]; |
60 | }; |
61 | |
62 | #ifdef CONFIG_INFINIBAND_USER_MEM |
63 | |
64 | struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, |
65 | size_t size, int access, int dmasync); |
66 | void ib_umem_release(struct ib_umem *umem); |
67 | int ib_umem_page_count(struct ib_umem *umem); |
68 | |
69 | #else /* CONFIG_INFINIBAND_USER_MEM */ |
70 | |
71 | #include <linux/err.h> |
72 | |
73 | static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context, |
74 | unsigned long addr, size_t size, |
75 | int access, int dmasync) { |
76 | return ERR_PTR(-EINVAL); |
77 | } |
78 | static inline void ib_umem_release(struct ib_umem *umem) { } |
79 | static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; } |
80 | |
81 | #endif /* CONFIG_INFINIBAND_USER_MEM */ |
82 | |
83 | #endif /* IB_UMEM_H */ |
84 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9