mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
bb55a4c100
It makes no sense for crypto_yield() to be defined in scatterwalk.h , move it into algapi.h as it's an internal function to crypto API. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/*
|
|
* 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 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;
|
|
sg1[num - 1].page_link |= 0x01;
|
|
}
|
|
|
|
static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
|
|
{
|
|
if (sg_is_last(sg))
|
|
return NULL;
|
|
|
|
return (++sg)->length ? sg : sg_chain_ptr(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);
|
|
|
|
int scatterwalk_bytes_sglen(struct scatterlist *sg, int num_bytes);
|
|
|
|
#endif /* _CRYPTO_SCATTERWALK_H */
|