diff options
Diffstat (limited to 'ANDROID_3.4.5/include/crypto/scatterwalk.h')
| -rw-r--r-- | ANDROID_3.4.5/include/crypto/scatterwalk.h | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/ANDROID_3.4.5/include/crypto/scatterwalk.h b/ANDROID_3.4.5/include/crypto/scatterwalk.h deleted file mode 100644 index 3744d2a6..00000000 --- a/ANDROID_3.4.5/include/crypto/scatterwalk.h +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Cryptographic scatter and gather helpers. - * - * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> - * Copyright (c) 2002 Adam J. Richter <adam@yggdrasil.com> - * Copyright (c) 2004 Jean-Luc Cooke <jlcooke@certainkey.com> - * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - */ - -#ifndef _CRYPTO_SCATTERWALK_H -#define _CRYPTO_SCATTERWALK_H - -#include <asm/kmap_types.h> -#include <crypto/algapi.h> -#include <linux/hardirq.h> -#include <linux/highmem.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/scatterlist.h> -#include <linux/sched.h> - -static inline void crypto_yield(u32 flags) -{ - if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) - cond_resched(); -} - -static inline void scatterwalk_sg_chain(struct scatterlist *sg1, int num, - struct scatterlist *sg2) -{ - sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0); - sg1[num - 1].page_link &= ~0x02; -} - -static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg) -{ - if (sg_is_last(sg)) - return NULL; - - return (++sg)->length ? sg : (void *)sg_page(sg); -} - -static inline void scatterwalk_crypto_chain(struct scatterlist *head, - struct scatterlist *sg, - int chain, int num) -{ - if (chain) { - head->length += sg->length; - sg = scatterwalk_sg_next(sg); - } - - if (sg) - scatterwalk_sg_chain(head, num, sg); - else - sg_mark_end(head); -} - -static inline unsigned long scatterwalk_samebuf(struct scatter_walk *walk_in, - struct scatter_walk *walk_out) -{ - return !(((sg_page(walk_in->sg) - sg_page(walk_out->sg)) << PAGE_SHIFT) + - (int)(walk_in->offset - walk_out->offset)); -} - -static inline unsigned int scatterwalk_pagelen(struct scatter_walk *walk) -{ - unsigned int len = walk->sg->offset + walk->sg->length - walk->offset; - unsigned int len_this_page = offset_in_page(~walk->offset) + 1; - return len_this_page > len ? len : len_this_page; -} - -static inline unsigned int scatterwalk_clamp(struct scatter_walk *walk, - unsigned int nbytes) -{ - unsigned int len_this_page = scatterwalk_pagelen(walk); - return nbytes > len_this_page ? len_this_page : nbytes; -} - -static inline void scatterwalk_advance(struct scatter_walk *walk, - unsigned int nbytes) -{ - walk->offset += nbytes; -} - -static inline unsigned int scatterwalk_aligned(struct scatter_walk *walk, - unsigned int alignmask) -{ - return !(walk->offset & alignmask); -} - -static inline struct page *scatterwalk_page(struct scatter_walk *walk) -{ - return sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT); -} - -static inline void scatterwalk_unmap(void *vaddr) -{ - kunmap_atomic(vaddr); -} - -void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg); -void scatterwalk_copychunks(void *buf, struct scatter_walk *walk, - size_t nbytes, int out); -void *scatterwalk_map(struct scatter_walk *walk); -void scatterwalk_done(struct scatter_walk *walk, int out, int more); - -void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg, - unsigned int start, unsigned int nbytes, int out); - -#endif /* _CRYPTO_SCATTERWALK_H */ |