mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 17:23:55 +08:00
crypto: omap - add base support library for common routines
This contains the generic APIs for aligning SG buffers. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tero Kristo
Herbert Xu
parent
418f2a8cf2
commit
74ed87e7e7
@ -314,6 +314,15 @@ config HW_RANDOM_PPC4XX
|
||||
This option provides the kernel-side support for the TRNG hardware
|
||||
found in the security function of some PowerPC 4xx SoCs.
|
||||
|
||||
config CRYPTO_DEV_OMAP
|
||||
tristate "Support for OMAP crypto HW accelerators"
|
||||
depends on ARCH_OMAP2PLUS
|
||||
help
|
||||
OMAP processors have various crypto HW accelerators. Select this if
|
||||
you want to use the OMAP modules for any of the crypto algorithms.
|
||||
|
||||
if CRYPTO_DEV_OMAP
|
||||
|
||||
config CRYPTO_DEV_OMAP_SHAM
|
||||
tristate "Support for OMAP MD5/SHA1/SHA2 hw accelerator"
|
||||
depends on ARCH_OMAP2PLUS
|
||||
@ -351,6 +360,8 @@ config CRYPTO_DEV_OMAP_DES
|
||||
the ECB and CBC modes of operation are supported by the driver. Also
|
||||
accesses made on unaligned boundaries are supported.
|
||||
|
||||
endif # CRYPTO_DEV_OMAP
|
||||
|
||||
config CRYPTO_DEV_PICOXCELL
|
||||
tristate "Support for picoXcell IPSEC and Layer2 crypto engines"
|
||||
depends on (ARCH_PICOXCELL || COMPILE_TEST) && HAVE_CLK
|
||||
|
||||
@ -20,6 +20,7 @@ obj-$(CONFIG_CRYPTO_DEV_MXC_SCC) += mxc-scc.o
|
||||
obj-$(CONFIG_CRYPTO_DEV_NIAGARA2) += n2_crypto.o
|
||||
n2_crypto-y := n2_core.o n2_asm.o
|
||||
obj-$(CONFIG_CRYPTO_DEV_NX) += nx/
|
||||
obj-$(CONFIG_CRYPTO_DEV_OMAP) += omap-crypto.o
|
||||
obj-$(CONFIG_CRYPTO_DEV_OMAP_AES) += omap-aes.o
|
||||
obj-$(CONFIG_CRYPTO_DEV_OMAP_DES) += omap-des.o
|
||||
obj-$(CONFIG_CRYPTO_DEV_OMAP_SHAM) += omap-sham.o
|
||||
|
||||
184
drivers/crypto/omap-crypto.c
Normal file
184
drivers/crypto/omap-crypto.c
Normal file
@ -0,0 +1,184 @@
|
||||
/*
|
||||
* OMAP Crypto driver common support routines.
|
||||
*
|
||||
* Copyright (c) 2017 Texas Instruments Incorporated
|
||||
* Tero Kristo <t-kristo@ti.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as published
|
||||
* by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/scatterlist.h>
|
||||
#include <crypto/scatterwalk.h>
|
||||
|
||||
#include "omap-crypto.h"
|
||||
|
||||
static int omap_crypto_copy_sg_lists(int total, int bs,
|
||||
struct scatterlist **sg,
|
||||
struct scatterlist *new_sg, u16 flags)
|
||||
{
|
||||
int n = sg_nents(*sg);
|
||||
struct scatterlist *tmp;
|
||||
|
||||
if (!(flags & OMAP_CRYPTO_FORCE_SINGLE_ENTRY)) {
|
||||
new_sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
|
||||
if (!new_sg)
|
||||
return -ENOMEM;
|
||||
|
||||
sg_init_table(new_sg, n);
|
||||
}
|
||||
|
||||
tmp = new_sg;
|
||||
|
||||
while (*sg && total) {
|
||||
int len = (*sg)->length;
|
||||
|
||||
if (total < len)
|
||||
len = total;
|
||||
|
||||
if (len > 0) {
|
||||
total -= len;
|
||||
sg_set_page(tmp, sg_page(*sg), len, (*sg)->offset);
|
||||
if (total <= 0)
|
||||
sg_mark_end(tmp);
|
||||
tmp = sg_next(tmp);
|
||||
}
|
||||
|
||||
*sg = sg_next(*sg);
|
||||
}
|
||||
|
||||
*sg = new_sg;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap_crypto_copy_sgs(int total, int bs, struct scatterlist **sg,
|
||||
struct scatterlist *new_sg, u16 flags)
|
||||
{
|
||||
void *buf;
|
||||
int pages;
|
||||
int new_len;
|
||||
|
||||
new_len = ALIGN(total, bs);
|
||||
pages = get_order(new_len);
|
||||
|
||||
buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
|
||||
if (!buf) {
|
||||
pr_err("%s: Couldn't allocate pages for unaligned cases.\n",
|
||||
__func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
if (flags & OMAP_CRYPTO_COPY_DATA) {
|
||||
scatterwalk_map_and_copy(buf, *sg, 0, total, 0);
|
||||
if (flags & OMAP_CRYPTO_ZERO_BUF)
|
||||
memset(buf + total, 0, new_len - total);
|
||||
}
|
||||
|
||||
if (!(flags & OMAP_CRYPTO_FORCE_SINGLE_ENTRY))
|
||||
sg_init_table(new_sg, 1);
|
||||
|
||||
sg_set_buf(new_sg, buf, new_len);
|
||||
|
||||
*sg = new_sg;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap_crypto_check_sg(struct scatterlist *sg, int total, int bs,
|
||||
u16 flags)
|
||||
{
|
||||
int len = 0;
|
||||
int num_sg = 0;
|
||||
|
||||
if (!IS_ALIGNED(total, bs))
|
||||
return OMAP_CRYPTO_NOT_ALIGNED;
|
||||
|
||||
while (sg) {
|
||||
num_sg++;
|
||||
|
||||
if (!IS_ALIGNED(sg->offset, 4))
|
||||
return OMAP_CRYPTO_NOT_ALIGNED;
|
||||
if (!IS_ALIGNED(sg->length, bs))
|
||||
return OMAP_CRYPTO_NOT_ALIGNED;
|
||||
|
||||
len += sg->length;
|
||||
sg = sg_next(sg);
|
||||
|
||||
if (len >= total)
|
||||
break;
|
||||
}
|
||||
|
||||
if ((flags & OMAP_CRYPTO_FORCE_SINGLE_ENTRY) && num_sg > 1)
|
||||
return OMAP_CRYPTO_NOT_ALIGNED;
|
||||
|
||||
if (len != total)
|
||||
return OMAP_CRYPTO_BAD_DATA_LENGTH;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int omap_crypto_align_sg(struct scatterlist **sg, int total, int bs,
|
||||
struct scatterlist *new_sg, u16 flags,
|
||||
u8 flags_shift, unsigned long *dd_flags)
|
||||
{
|
||||
int ret;
|
||||
|
||||
*dd_flags &= ~(OMAP_CRYPTO_COPY_MASK << flags_shift);
|
||||
|
||||
if (flags & OMAP_CRYPTO_FORCE_COPY)
|
||||
ret = OMAP_CRYPTO_NOT_ALIGNED;
|
||||
else
|
||||
ret = omap_crypto_check_sg(*sg, total, bs, flags);
|
||||
|
||||
if (ret == OMAP_CRYPTO_NOT_ALIGNED) {
|
||||
ret = omap_crypto_copy_sgs(total, bs, sg, new_sg, flags);
|
||||
if (ret)
|
||||
return ret;
|
||||
*dd_flags |= OMAP_CRYPTO_DATA_COPIED << flags_shift;
|
||||
} else if (ret == OMAP_CRYPTO_BAD_DATA_LENGTH) {
|
||||
ret = omap_crypto_copy_sg_lists(total, bs, sg, new_sg, flags);
|
||||
if (ret)
|
||||
return ret;
|
||||
if (!(flags & OMAP_CRYPTO_FORCE_SINGLE_ENTRY))
|
||||
*dd_flags |= OMAP_CRYPTO_SG_COPIED << flags_shift;
|
||||
} else if (flags & OMAP_CRYPTO_FORCE_SINGLE_ENTRY) {
|
||||
sg_set_buf(new_sg, sg_virt(*sg), (*sg)->length);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(omap_crypto_align_sg);
|
||||
|
||||
void omap_crypto_cleanup(struct scatterlist *sg, struct scatterlist *orig,
|
||||
int offset, int len, u8 flags_shift,
|
||||
unsigned long flags)
|
||||
{
|
||||
void *buf;
|
||||
int pages;
|
||||
|
||||
flags >>= flags_shift;
|
||||
flags &= OMAP_CRYPTO_COPY_MASK;
|
||||
|
||||
if (!flags)
|
||||
return;
|
||||
|
||||
buf = sg_virt(sg);
|
||||
pages = get_order(len);
|
||||
|
||||
if (orig && (flags & OMAP_CRYPTO_COPY_MASK))
|
||||
scatterwalk_map_and_copy(buf, orig, offset, len, 1);
|
||||
|
||||
if (flags & OMAP_CRYPTO_DATA_COPIED)
|
||||
free_pages((unsigned long)buf, pages);
|
||||
else if (flags & OMAP_CRYPTO_SG_COPIED)
|
||||
kfree(sg);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(omap_crypto_cleanup);
|
||||
|
||||
MODULE_DESCRIPTION("OMAP crypto support library.");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Tero Kristo <t-kristo@ti.com>");
|
||||
37
drivers/crypto/omap-crypto.h
Normal file
37
drivers/crypto/omap-crypto.h
Normal file
@ -0,0 +1,37 @@
|
||||
/*
|
||||
* OMAP Crypto driver common support routines.
|
||||
*
|
||||
* Copyright (c) 2017 Texas Instruments Incorporated
|
||||
* Tero Kristo <t-kristo@ti.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as published
|
||||
* by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __CRYPTO_OMAP_CRYPTO_H
|
||||
#define __CRYPTO_OMAP_CRYPTO_H
|
||||
|
||||
enum {
|
||||
OMAP_CRYPTO_NOT_ALIGNED = 1,
|
||||
OMAP_CRYPTO_BAD_DATA_LENGTH,
|
||||
};
|
||||
|
||||
#define OMAP_CRYPTO_DATA_COPIED BIT(0)
|
||||
#define OMAP_CRYPTO_SG_COPIED BIT(1)
|
||||
|
||||
#define OMAP_CRYPTO_COPY_MASK 0x3
|
||||
|
||||
#define OMAP_CRYPTO_COPY_DATA BIT(0)
|
||||
#define OMAP_CRYPTO_FORCE_COPY BIT(1)
|
||||
#define OMAP_CRYPTO_ZERO_BUF BIT(2)
|
||||
#define OMAP_CRYPTO_FORCE_SINGLE_ENTRY BIT(3)
|
||||
|
||||
int omap_crypto_align_sg(struct scatterlist **sg, int total, int bs,
|
||||
struct scatterlist *new_sg, u16 flags,
|
||||
u8 flags_shift, unsigned long *dd_flags);
|
||||
void omap_crypto_cleanup(struct scatterlist *sg, struct scatterlist *orig,
|
||||
int offset, int len, u8 flags_shift,
|
||||
unsigned long flags);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user