diff options
Diffstat (limited to 'include/rdma/ib_umem.h')
-rw-r--r-- | include/rdma/ib_umem.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h new file mode 100644 index 000000000000..06307f7e43e0 --- /dev/null +++ b/include/rdma/ib_umem.h | |||
@@ -0,0 +1,78 @@ | |||
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 | |||
39 | struct ib_ucontext; | ||
40 | |||
41 | struct ib_umem { | ||
42 | struct ib_ucontext *context; | ||
43 | size_t length; | ||
44 | int offset; | ||
45 | int page_size; | ||
46 | int writable; | ||
47 | struct list_head chunk_list; | ||
48 | }; | ||
49 | |||
50 | struct ib_umem_chunk { | ||
51 | struct list_head list; | ||
52 | int nents; | ||
53 | int nmap; | ||
54 | struct scatterlist page_list[0]; | ||
55 | }; | ||
56 | |||
57 | #ifdef CONFIG_INFINIBAND_USER_MEM | ||
58 | |||
59 | struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, | ||
60 | size_t size, int access); | ||
61 | void ib_umem_release(struct ib_umem *umem); | ||
62 | int ib_umem_page_count(struct ib_umem *umem); | ||
63 | |||
64 | #else /* CONFIG_INFINIBAND_USER_MEM */ | ||
65 | |||
66 | #include <linux/err.h> | ||
67 | |||
68 | static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context, | ||
69 | unsigned long addr, size_t size, | ||
70 | int access) { | ||
71 | return ERR_PTR(-EINVAL); | ||
72 | } | ||
73 | static inline void ib_umem_release(struct ib_umem *umem) { } | ||
74 | static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; } | ||
75 | |||
76 | #endif /* CONFIG_INFINIBAND_USER_MEM */ | ||
77 | |||
78 | #endif /* IB_UMEM_H */ | ||