diff options
Diffstat (limited to 'crypto/scatterwalk.h')
-rw-r--r-- | crypto/scatterwalk.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/crypto/scatterwalk.h b/crypto/scatterwalk.h deleted file mode 100644 index 87ed681cceba..000000000000 --- a/crypto/scatterwalk.h +++ /dev/null | |||
@@ -1,80 +0,0 @@ | |||
1 | /* | ||
2 | * Cryptographic API. | ||
3 | * | ||
4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | ||
5 | * Copyright (c) 2002 Adam J. Richter <adam@yggdrasil.com> | ||
6 | * Copyright (c) 2004 Jean-Luc Cooke <jlcooke@certainkey.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify it | ||
9 | * under the terms of the GNU General Public License as published by the Free | ||
10 | * Software Foundation; either version 2 of the License, or (at your option) | ||
11 | * any later version. | ||
12 | * | ||
13 | */ | ||
14 | |||
15 | #ifndef _CRYPTO_SCATTERWALK_H | ||
16 | #define _CRYPTO_SCATTERWALK_H | ||
17 | |||
18 | #include <linux/mm.h> | ||
19 | #include <linux/scatterlist.h> | ||
20 | |||
21 | #include "internal.h" | ||
22 | |||
23 | static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg) | ||
24 | { | ||
25 | return (++sg)->length ? sg : (void *) sg_page(sg); | ||
26 | } | ||
27 | |||
28 | static inline unsigned long scatterwalk_samebuf(struct scatter_walk *walk_in, | ||
29 | struct scatter_walk *walk_out) | ||
30 | { | ||
31 | return !(((sg_page(walk_in->sg) - sg_page(walk_out->sg)) << PAGE_SHIFT) + | ||
32 | (int)(walk_in->offset - walk_out->offset)); | ||
33 | } | ||
34 | |||
35 | static inline unsigned int scatterwalk_pagelen(struct scatter_walk *walk) | ||
36 | { | ||
37 | unsigned int len = walk->sg->offset + walk->sg->length - walk->offset; | ||
38 | unsigned int len_this_page = offset_in_page(~walk->offset) + 1; | ||
39 | return len_this_page > len ? len : len_this_page; | ||
40 | } | ||
41 | |||
42 | static inline unsigned int scatterwalk_clamp(struct scatter_walk *walk, | ||
43 | unsigned int nbytes) | ||
44 | { | ||
45 | unsigned int len_this_page = scatterwalk_pagelen(walk); | ||
46 | return nbytes > len_this_page ? len_this_page : nbytes; | ||
47 | } | ||
48 | |||
49 | static inline void scatterwalk_advance(struct scatter_walk *walk, | ||
50 | unsigned int nbytes) | ||
51 | { | ||
52 | walk->offset += nbytes; | ||
53 | } | ||
54 | |||
55 | static inline unsigned int scatterwalk_aligned(struct scatter_walk *walk, | ||
56 | unsigned int alignmask) | ||
57 | { | ||
58 | return !(walk->offset & alignmask); | ||
59 | } | ||
60 | |||
61 | static inline struct page *scatterwalk_page(struct scatter_walk *walk) | ||
62 | { | ||
63 | return sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT); | ||
64 | } | ||
65 | |||
66 | static inline void scatterwalk_unmap(void *vaddr, int out) | ||
67 | { | ||
68 | crypto_kunmap(vaddr, out); | ||
69 | } | ||
70 | |||
71 | void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg); | ||
72 | void scatterwalk_copychunks(void *buf, struct scatter_walk *walk, | ||
73 | size_t nbytes, int out); | ||
74 | void *scatterwalk_map(struct scatter_walk *walk, int out); | ||
75 | void scatterwalk_done(struct scatter_walk *walk, int out, int more); | ||
76 | |||
77 | void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg, | ||
78 | unsigned int start, unsigned int nbytes, int out); | ||
79 | |||
80 | #endif /* _CRYPTO_SCATTERWALK_H */ | ||