u-boot/drivers/crypto/fsl/fsl_hash.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

230 lines
5.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
*/
#include <common.h>
#include <malloc.h>
#include <memalign.h>
#include "jobdesc.h"
#include "desc.h"
#include "jr.h"
#include "fsl_hash.h"
#include <hw_sha.h>
#include <linux/errno.h>
#define CRYPTO_MAX_ALG_NAME 80
#define SHA1_DIGEST_SIZE 20
#define SHA256_DIGEST_SIZE 32
struct caam_hash_template {
char name[CRYPTO_MAX_ALG_NAME];
unsigned int digestsize;
u32 alg_type;
};
enum caam_hash_algos {
SHA1 = 0,
SHA256
};
static struct caam_hash_template driver_hash[] = {
{
.name = "sha1",
.digestsize = SHA1_DIGEST_SIZE,
.alg_type = OP_ALG_ALGSEL_SHA1,
},
{
.name = "sha256",
.digestsize = SHA256_DIGEST_SIZE,
.alg_type = OP_ALG_ALGSEL_SHA256,
},
};
static enum caam_hash_algos get_hash_type(struct hash_algo *algo)
{
if (!strcmp(algo->name, driver_hash[SHA1].name))
return SHA1;
else
return SHA256;
}
/* Create the context for progressive hashing using h/w acceleration.
*
* @ctxp: Pointer to the pointer of the context for hashing
* @caam_algo: Enum for SHA1 or SHA256
* @return 0 if ok, -ENOMEM on error
*/
static int caam_hash_init(void **ctxp, enum caam_hash_algos caam_algo)
{
*ctxp = calloc(1, sizeof(struct sha_ctx));
if (*ctxp == NULL) {
debug("Cannot allocate memory for context\n");
return -ENOMEM;
}
return 0;
}
/*
* Update sg table for progressive hashing using h/w acceleration
*
* The context is freed by this function if an error occurs.
* We support at most 32 Scatter/Gather Entries.
*
* @hash_ctx: Pointer to the context for hashing
* @buf: Pointer to the buffer being hashed
* @size: Size of the buffer being hashed
* @is_last: 1 if this is the last update; 0 otherwise
* @caam_algo: Enum for SHA1 or SHA256
* @return 0 if ok, -EINVAL on error
*/
static int caam_hash_update(void *hash_ctx, const void *buf,
unsigned int size, int is_last,
enum caam_hash_algos caam_algo)
{
uint32_t final = 0;
phys_addr_t addr = virt_to_phys((void *)buf);
struct sha_ctx *ctx = hash_ctx;
if (ctx->sg_num >= MAX_SG_32) {
free(ctx);
return -EINVAL;
}
#ifdef CONFIG_PHYS_64BIT
sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, (uint32_t)(addr >> 32));
#else
sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, 0x0);
#endif
sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_lo, (uint32_t)addr);
sec_out32(&ctx->sg_tbl[ctx->sg_num].len_flag,
(size & SG_ENTRY_LENGTH_MASK));
ctx->sg_num++;
if (is_last) {
final = sec_in32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag) |
SG_ENTRY_FINAL_BIT;
sec_out32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag, final);
}
return 0;
}
/*
* Perform progressive hashing on the given buffer and copy hash at
* destination buffer
*
* The context is freed after completion of hash operation.
*
* @hash_ctx: Pointer to the context for hashing
* @dest_buf: Pointer to the destination buffer where hash is to be copied
* @size: Size of the buffer being hashed
* @caam_algo: Enum for SHA1 or SHA256
* @return 0 if ok, -EINVAL on error
*/
static int caam_hash_finish(void *hash_ctx, void *dest_buf,
int size, enum caam_hash_algos caam_algo)
{
uint32_t len = 0;
struct sha_ctx *ctx = hash_ctx;
int i = 0, ret = 0;
if (size < driver_hash[caam_algo].digestsize) {
free(ctx);
return -EINVAL;
}
for (i = 0; i < ctx->sg_num; i++)
len += (sec_in32(&ctx->sg_tbl[i].len_flag) &
SG_ENTRY_LENGTH_MASK);
inline_cnstr_jobdesc_hash(ctx->sha_desc, (uint8_t *)ctx->sg_tbl, len,
ctx->hash,
driver_hash[caam_algo].alg_type,
driver_hash[caam_algo].digestsize,
1);
ret = run_descriptor_jr(ctx->sha_desc);
if (ret)
debug("Error %x\n", ret);
else
memcpy(dest_buf, ctx->hash, sizeof(ctx->hash));
free(ctx);
return ret;
}
int caam_hash(const unsigned char *pbuf, unsigned int buf_len,
unsigned char *pout, enum caam_hash_algos algo)
{
int ret = 0;
uint32_t *desc;
unsigned int size;
desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
if (!desc) {
debug("Not enough memory for descriptor allocation\n");
return -ENOMEM;
}
if (!IS_ALIGNED((uintptr_t)pbuf, ARCH_DMA_MINALIGN) ||
!IS_ALIGNED((uintptr_t)pout, ARCH_DMA_MINALIGN)) {
puts("Error: Address arguments are not aligned\n");
return -EINVAL;
}
size = ALIGN(buf_len, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)pbuf, (unsigned long)pbuf + size);
inline_cnstr_jobdesc_hash(desc, pbuf, buf_len, pout,
driver_hash[algo].alg_type,
driver_hash[algo].digestsize,
0);
size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)desc, (unsigned long)desc + size);
ret = run_descriptor_jr(desc);
size = ALIGN(driver_hash[algo].digestsize, ARCH_DMA_MINALIGN);
invalidate_dcache_range((unsigned long)pout,
(unsigned long)pout + size);
free(desc);
return ret;
}
void hw_sha256(const unsigned char *pbuf, unsigned int buf_len,
unsigned char *pout, unsigned int chunk_size)
{
if (caam_hash(pbuf, buf_len, pout, SHA256))
printf("CAAM was not setup properly or it is faulty\n");
}
void hw_sha1(const unsigned char *pbuf, unsigned int buf_len,
unsigned char *pout, unsigned int chunk_size)
{
if (caam_hash(pbuf, buf_len, pout, SHA1))
printf("CAAM was not setup properly or it is faulty\n");
}
int hw_sha_init(struct hash_algo *algo, void **ctxp)
{
return caam_hash_init(ctxp, get_hash_type(algo));
}
int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf,
unsigned int size, int is_last)
{
return caam_hash_update(ctx, buf, size, is_last, get_hash_type(algo));
}
int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf,
int size)
{
return caam_hash_finish(ctx, dest_buf, size, get_hash_type(algo));
}