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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> | |
e8edc6e0 | 38 | #include <linux/workqueue.h> |
f7c6a7b5 RD |
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; | |
c8d8beea | 48 | int hugetlb; |
f7c6a7b5 | 49 | struct list_head chunk_list; |
1bf66a30 RD |
50 | struct work_struct work; |
51 | struct mm_struct *mm; | |
52 | unsigned long diff; | |
f7c6a7b5 RD |
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, | |
cb9fbc5c | 65 | size_t size, int access, int dmasync); |
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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, | |
cb9fbc5c | 75 | int access, int dmasync) { |
f7c6a7b5 RD |
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 */ |