[net-next-2.6.git] / drivers / crypto / padlock-sha.c

/*
 * Cryptographic API.
 *
 * Support for VIA PadLock hardware crypto engine.
 *
 * Copyright (c) 2006  Michal Ludvig <michal@logix.cz>
 *
 * 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.
 *
 */

#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
#include <asm/i387.h>
#include "padlock.h"

#ifdef CONFIG_64BIT
#define STACK_ALIGN 16
#else
#define STACK_ALIGN 4
#endif

struct padlock_sha_desc {
	struct shash_desc fallback;
};

struct padlock_sha_ctx {
	struct crypto_shash *fallback;
};

static int padlock_sha_init(struct shash_desc *desc)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);

	dctx->fallback.tfm = ctx->fallback;
	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	return crypto_shash_init(&dctx->fallback);
}

static int padlock_sha_update(struct shash_desc *desc,
			      const u8 *data, unsigned int length)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	return crypto_shash_update(&dctx->fallback, data, length);
}

static int padlock_sha_export(struct shash_desc *desc, void *out)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

	return crypto_shash_export(&dctx->fallback, out);
}

static int padlock_sha_import(struct shash_desc *desc, const void *in)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);

	dctx->fallback.tfm = ctx->fallback;
	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	return crypto_shash_import(&dctx->fallback, in);
}

static inline void padlock_output_block(uint32_t *src,
		 	uint32_t *dst, size_t count)
{
	while (count--)
		*dst++ = swab32(*src++);
}

static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
			      unsigned int count, u8 *out)
{
	/* We can't store directly to *out as it may be unaligned. */
	/* BTW Don't reduce the buffer size below 128 Bytes!
	 *     PadLock microcode needs it that big. */
	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
		((aligned(STACK_ALIGN)));
	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct sha1_state state;
	unsigned int space;
	unsigned int leftover;
	int ts_state;
	int err;

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	err = crypto_shash_export(&dctx->fallback, &state);
	if (err)
		goto out;

	if (state.count + count > ULONG_MAX)
		return crypto_shash_finup(&dctx->fallback, in, count, out);

	leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1;
	space =  SHA1_BLOCK_SIZE - leftover;
	if (space) {
		if (count > space) {
			err = crypto_shash_update(&dctx->fallback, in, space) ?:
			      crypto_shash_export(&dctx->fallback, &state);
			if (err)
				goto out;
			count -= space;
			in += space;
		} else {
			memcpy(state.buffer + leftover, in, count);
			in = state.buffer;
			count += leftover;
			state.count &= ~(SHA1_BLOCK_SIZE - 1);
		}
	}

	memcpy(result, &state.state, SHA1_DIGEST_SIZE);

	/* prevent taking the spurious DNA fault with padlock. */
	ts_state = irq_ts_save();
	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
		      : \
		      : "c"((unsigned long)state.count + count), \
			"a"((unsigned long)state.count), \
			"S"(in), "D"(result));
	irq_ts_restore(ts_state);

	padlock_output_block((uint32_t *)result, (uint32_t *)out, 5);

out:
	return err;
}

static int padlock_sha1_final(struct shash_desc *desc, u8 *out)
{
	u8 buf[4];

	return padlock_sha1_finup(desc, buf, 0, out);
}

static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
				unsigned int count, u8 *out)
{
	/* We can't store directly to *out as it may be unaligned. */
	/* BTW Don't reduce the buffer size below 128 Bytes!
	 *     PadLock microcode needs it that big. */
	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
		((aligned(STACK_ALIGN)));
	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct sha256_state state;
	unsigned int space;
	unsigned int leftover;
	int ts_state;
	int err;

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	err = crypto_shash_export(&dctx->fallback, &state);
	if (err)
		goto out;

	if (state.count + count > ULONG_MAX)
		return crypto_shash_finup(&dctx->fallback, in, count, out);

	leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1;
	space =  SHA256_BLOCK_SIZE - leftover;
	if (space) {
		if (count > space) {
			err = crypto_shash_update(&dctx->fallback, in, space) ?:
			      crypto_shash_export(&dctx->fallback, &state);
			if (err)
				goto out;
			count -= space;
			in += space;
		} else {
			memcpy(state.buf + leftover, in, count);
			in = state.buf;
			count += leftover;
			state.count &= ~(SHA1_BLOCK_SIZE - 1);
		}
	}

	memcpy(result, &state.state, SHA256_DIGEST_SIZE);

	/* prevent taking the spurious DNA fault with padlock. */
	ts_state = irq_ts_save();
	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
		      : \
		      : "c"((unsigned long)state.count + count), \
			"a"((unsigned long)state.count), \
			"S"(in), "D"(result));
	irq_ts_restore(ts_state);

	padlock_output_block((uint32_t *)result, (uint32_t *)out, 8);

out:
	return err;
}

static int padlock_sha256_final(struct shash_desc *desc, u8 *out)
{
	u8 buf[4];

	return padlock_sha256_finup(desc, buf, 0, out);
}

static int padlock_cra_init(struct crypto_tfm *tfm)
{
	struct crypto_shash *hash = __crypto_shash_cast(tfm);
	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_shash *fallback_tfm;
	int err = -ENOMEM;

	/* Allocate a fallback and abort if it failed. */
	fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
					  CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(fallback_tfm)) {
		printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
		       fallback_driver_name);
		err = PTR_ERR(fallback_tfm);
		goto out;
	}

	ctx->fallback = fallback_tfm;
	hash->descsize += crypto_shash_descsize(fallback_tfm);
	return 0;

out:
	return err;
}

static void padlock_cra_exit(struct crypto_tfm *tfm)
{
	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);

	crypto_free_shash(ctx->fallback);
}

static struct shash_alg sha1_alg = {
	.digestsize	=	SHA1_DIGEST_SIZE,
	.init   	= 	padlock_sha_init,
	.update 	=	padlock_sha_update,
	.finup  	=	padlock_sha1_finup,
	.final  	=	padlock_sha1_final,
	.export		=	padlock_sha_export,
	.import		=	padlock_sha_import,
	.descsize	=	sizeof(struct padlock_sha_desc),
	.statesize	=	sizeof(struct sha1_state),
	.base		=	{
		.cra_name		=	"sha1",
		.cra_driver_name	=	"sha1-padlock",
		.cra_priority		=	PADLOCK_CRA_PRIORITY,
		.cra_flags		=	CRYPTO_ALG_TYPE_SHASH |
						CRYPTO_ALG_NEED_FALLBACK,
		.cra_blocksize		=	SHA1_BLOCK_SIZE,
		.cra_ctxsize		=	sizeof(struct padlock_sha_ctx),
		.cra_module		=	THIS_MODULE,
		.cra_init		=	padlock_cra_init,
		.cra_exit		=	padlock_cra_exit,
	}
};

static struct shash_alg sha256_alg = {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init   	= 	padlock_sha_init,
	.update 	=	padlock_sha_update,
	.finup  	=	padlock_sha256_finup,
	.final  	=	padlock_sha256_final,
	.export		=	padlock_sha_export,
	.import		=	padlock_sha_import,
	.descsize	=	sizeof(struct padlock_sha_desc),
	.statesize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name		=	"sha256",
		.cra_driver_name	=	"sha256-padlock",
		.cra_priority		=	PADLOCK_CRA_PRIORITY,
		.cra_flags		=	CRYPTO_ALG_TYPE_SHASH |
						CRYPTO_ALG_NEED_FALLBACK,
		.cra_blocksize		=	SHA256_BLOCK_SIZE,
		.cra_ctxsize		=	sizeof(struct padlock_sha_ctx),
		.cra_module		=	THIS_MODULE,
		.cra_init		=	padlock_cra_init,
		.cra_exit		=	padlock_cra_exit,
	}
};

static int __init padlock_init(void)
{
	int rc = -ENODEV;

	if (!cpu_has_phe) {
		printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
		return -ENODEV;
	}

	if (!cpu_has_phe_enabled) {
		printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
		return -ENODEV;
	}

	rc = crypto_register_shash(&sha1_alg);
	if (rc)
		goto out;

	rc = crypto_register_shash(&sha256_alg);
	if (rc)
		goto out_unreg1;

	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");

	return 0;

out_unreg1:
	crypto_unregister_shash(&sha1_alg);
out:
	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	return rc;
}

static void __exit padlock_fini(void)
{
	crypto_unregister_shash(&sha1_alg);
	crypto_unregister_shash(&sha256_alg);
}

module_init(padlock_init);
module_exit(padlock_fini);

MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");

MODULE_ALIAS("sha1-all");
MODULE_ALIAS("sha256-all");
MODULE_ALIAS("sha1-padlock");
MODULE_ALIAS("sha256-padlock");
Commit	Line	Data
6c833275 ML	1	/*
	2	* Cryptographic API.
	3	*
	4	* Support for VIA PadLock hardware crypto engine.
	5	*
	6	* Copyright (c) 2006 Michal Ludvig <michal@logix.cz>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*/
	14
7d024608	15	#include <crypto/internal/hash.h>
5265eeb2	16	#include <crypto/sha.h>
6010439f	17	#include <linux/err.h>
6c833275 ML	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/errno.h>
6c833275 ML	21	#include <linux/interrupt.h>
	22	#include <linux/kernel.h>
	23	#include <linux/scatterlist.h>
e4914012	24	#include <asm/i387.h>
6c833275 ML	25	#include "padlock.h"
6c833275 ML	26
4c6ab3ee HX	27	#ifdef CONFIG_64BIT
	28	#define STACK_ALIGN 16
	29	#else
	30	#define STACK_ALIGN 4
	31	#endif
	32
bbbee467 HX	33	struct padlock_sha_desc {
bbbee467 HX	34	struct shash_desc fallback;
6c833275 ML	35	};
6c833275 ML	36
bbbee467 HX	37	struct padlock_sha_ctx {
	38	struct crypto_shash *fallback;
	39	};
6c833275	40
bbbee467	41	static int padlock_sha_init(struct shash_desc *desc)
6c833275	42	{
bbbee467 HX	43	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
bbbee467 HX	44	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
6c833275	45
bbbee467 HX	46	dctx->fallback.tfm = ctx->fallback;
	47	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	48	return crypto_shash_init(&dctx->fallback);
6c833275 ML	49	}
6c833275 ML	50
bbbee467 HX	51	static int padlock_sha_update(struct shash_desc *desc,
bbbee467 HX	52	const u8 *data, unsigned int length)
6c833275	53	{
bbbee467	54	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
6c833275	55
bbbee467 HX	56	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
bbbee467 HX	57	return crypto_shash_update(&dctx->fallback, data, length);
6c833275 ML	58	}
6c833275 ML	59
a8d7ac27 HX	60	static int padlock_sha_export(struct shash_desc desc, void out)
	61	{
	62	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	63
	64	return crypto_shash_export(&dctx->fallback, out);
	65	}
	66
	67	static int padlock_sha_import(struct shash_desc desc, const void in)
	68	{
	69	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	70	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
	71
	72	dctx->fallback.tfm = ctx->fallback;
	73	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	74	return crypto_shash_import(&dctx->fallback, in);
	75	}
	76
6c833275 ML	77	static inline void padlock_output_block(uint32_t *src,
	78	uint32_t *dst, size_t count)
	79	{
	80	while (count--)
	81	dst++ = swab32(src++);
	82	}
	83
bbbee467 HX	84	static int padlock_sha1_finup(struct shash_desc desc, const u8 in,
bbbee467 HX	85	unsigned int count, u8 *out)
6c833275 ML	86	{
	87	/* We can't store directly to out as it may be unaligned. /
	88	/* BTW Don't reduce the buffer size below 128 Bytes!
	89	* PadLock microcode needs it that big. */
4c6ab3ee HX	90	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	91	((aligned(STACK_ALIGN)));
	92	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	93	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	94	struct sha1_state state;
	95	unsigned int space;
	96	unsigned int leftover;
e4914012	97	int ts_state;
bbbee467 HX	98	int err;
	99
	100	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	101	err = crypto_shash_export(&dctx->fallback, &state);
	102	if (err)
	103	goto out;
	104
	105	if (state.count + count > ULONG_MAX)
	106	return crypto_shash_finup(&dctx->fallback, in, count, out);
	107
	108	leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1;
	109	space = SHA1_BLOCK_SIZE - leftover;
	110	if (space) {
	111	if (count > space) {
	112	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	113	crypto_shash_export(&dctx->fallback, &state);
	114	if (err)
	115	goto out;
	116	count -= space;
	117	in += space;
	118	} else {
	119	memcpy(state.buffer + leftover, in, count);
	120	in = state.buffer;
	121	count += leftover;
e9b25f16	122	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	123	}
	124	}
	125
	126	memcpy(result, &state.state, SHA1_DIGEST_SIZE);
6c833275	127
e4914012 SS	128	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	129	ts_state = irq_ts_save();
6c833275	130	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
bbbee467	131	: \
faae8908 HX	132	: "c"((unsigned long)state.count + count), \
faae8908 HX	133	"a"((unsigned long)state.count), \
bbbee467	134	"S"(in), "D"(result));
e4914012	135	irq_ts_restore(ts_state);
6c833275 ML	136
6c833275 ML	137	padlock_output_block((uint32_t )result, (uint32_t )out, 5);
bbbee467 HX	138
	139	out:
	140	return err;
6c833275 ML	141	}
6c833275 ML	142
bbbee467 HX	143	static int padlock_sha1_final(struct shash_desc desc, u8 out)
	144	{
	145	u8 buf[4];
	146
	147	return padlock_sha1_finup(desc, buf, 0, out);
	148	}
	149
	150	static int padlock_sha256_finup(struct shash_desc desc, const u8 in,
	151	unsigned int count, u8 *out)
6c833275 ML	152	{
	153	/* We can't store directly to out as it may be unaligned. /
	154	/* BTW Don't reduce the buffer size below 128 Bytes!
	155	* PadLock microcode needs it that big. */
4c6ab3ee HX	156	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	157	((aligned(STACK_ALIGN)));
	158	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	159	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	160	struct sha256_state state;
	161	unsigned int space;
	162	unsigned int leftover;
e4914012	163	int ts_state;
bbbee467	164	int err;
6c833275	165
bbbee467 HX	166	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	167	err = crypto_shash_export(&dctx->fallback, &state);
	168	if (err)
	169	goto out;
	170
	171	if (state.count + count > ULONG_MAX)
	172	return crypto_shash_finup(&dctx->fallback, in, count, out);
	173
	174	leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1;
	175	space = SHA256_BLOCK_SIZE - leftover;
	176	if (space) {
	177	if (count > space) {
	178	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	179	crypto_shash_export(&dctx->fallback, &state);
	180	if (err)
	181	goto out;
	182	count -= space;
	183	in += space;
	184	} else {
	185	memcpy(state.buf + leftover, in, count);
	186	in = state.buf;
	187	count += leftover;
e9b25f16	188	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	189	}
	190	}
	191
	192	memcpy(result, &state.state, SHA256_DIGEST_SIZE);
6c833275	193
e4914012 SS	194	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	195	ts_state = irq_ts_save();
6c833275	196	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
bbbee467	197	: \
faae8908 HX	198	: "c"((unsigned long)state.count + count), \
faae8908 HX	199	"a"((unsigned long)state.count), \
bbbee467	200	"S"(in), "D"(result));
e4914012	201	irq_ts_restore(ts_state);
6c833275 ML	202
6c833275 ML	203	padlock_output_block((uint32_t )result, (uint32_t )out, 8);
bbbee467 HX	204
	205	out:
	206	return err;
6c833275 ML	207	}
6c833275 ML	208
bbbee467	209	static int padlock_sha256_final(struct shash_desc desc, u8 out)
6c833275	210	{
bbbee467	211	u8 buf[4];
6c833275	212
bbbee467	213	return padlock_sha256_finup(desc, buf, 0, out);
6c833275 ML	214	}
6c833275 ML	215
6010439f	216	static int padlock_cra_init(struct crypto_tfm *tfm)
6c833275	217	{
bbbee467	218	struct crypto_shash *hash = __crypto_shash_cast(tfm);
6010439f	219	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
bbbee467	220	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608 HX	221	struct crypto_shash *fallback_tfm;
7d024608 HX	222	int err = -ENOMEM;
6010439f	223
6c833275	224	/* Allocate a fallback and abort if it failed. */
7d024608 HX	225	fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
7d024608 HX	226	CRYPTO_ALG_NEED_FALLBACK);
6010439f	227	if (IS_ERR(fallback_tfm)) {
6c833275 ML	228	printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
6c833275 ML	229	fallback_driver_name);
7d024608	230	err = PTR_ERR(fallback_tfm);
bbbee467	231	goto out;
6c833275 ML	232	}
6c833275 ML	233
bbbee467 HX	234	ctx->fallback = fallback_tfm;
bbbee467 HX	235	hash->descsize += crypto_shash_descsize(fallback_tfm);
6c833275	236	return 0;
7d024608	237
7d024608 HX	238	out:
7d024608 HX	239	return err;
6c833275 ML	240	}
6c833275 ML	241
6c833275 ML	242	static void padlock_cra_exit(struct crypto_tfm *tfm)
6c833275 ML	243	{
bbbee467	244	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608	245
bbbee467	246	crypto_free_shash(ctx->fallback);
6c833275 ML	247	}
6c833275 ML	248
bbbee467 HX	249	static struct shash_alg sha1_alg = {
	250	.digestsize = SHA1_DIGEST_SIZE,
	251	.init = padlock_sha_init,
	252	.update = padlock_sha_update,
	253	.finup = padlock_sha1_finup,
	254	.final = padlock_sha1_final,
a8d7ac27 HX	255	.export = padlock_sha_export,
a8d7ac27 HX	256	.import = padlock_sha_import,
bbbee467	257	.descsize = sizeof(struct padlock_sha_desc),
a8d7ac27	258	.statesize = sizeof(struct sha1_state),
bbbee467 HX	259	.base = {
	260	.cra_name = "sha1",
	261	.cra_driver_name = "sha1-padlock",
	262	.cra_priority = PADLOCK_CRA_PRIORITY,
	263	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	264	CRYPTO_ALG_NEED_FALLBACK,
	265	.cra_blocksize = SHA1_BLOCK_SIZE,
	266	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	267	.cra_module = THIS_MODULE,
	268	.cra_init = padlock_cra_init,
	269	.cra_exit = padlock_cra_exit,
6c833275 ML	270	}
	271	};
	272
bbbee467 HX	273	static struct shash_alg sha256_alg = {
	274	.digestsize = SHA256_DIGEST_SIZE,
	275	.init = padlock_sha_init,
	276	.update = padlock_sha_update,
	277	.finup = padlock_sha256_finup,
	278	.final = padlock_sha256_final,
a8d7ac27 HX	279	.export = padlock_sha_export,
a8d7ac27 HX	280	.import = padlock_sha_import,
bbbee467	281	.descsize = sizeof(struct padlock_sha_desc),
a8d7ac27	282	.statesize = sizeof(struct sha256_state),
bbbee467 HX	283	.base = {
	284	.cra_name = "sha256",
	285	.cra_driver_name = "sha256-padlock",
	286	.cra_priority = PADLOCK_CRA_PRIORITY,
	287	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	288	CRYPTO_ALG_NEED_FALLBACK,
	289	.cra_blocksize = SHA256_BLOCK_SIZE,
	290	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	291	.cra_module = THIS_MODULE,
	292	.cra_init = padlock_cra_init,
	293	.cra_exit = padlock_cra_exit,
6c833275 ML	294	}
	295	};
	296
6c833275 ML	297	static int __init padlock_init(void)
	298	{
	299	int rc = -ENODEV;
	300
	301	if (!cpu_has_phe) {
b43e726b	302	printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
6c833275 ML	303	return -ENODEV;
	304	}
	305
	306	if (!cpu_has_phe_enabled) {
b43e726b	307	printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
6c833275 ML	308	return -ENODEV;
	309	}
	310
bbbee467	311	rc = crypto_register_shash(&sha1_alg);
6c833275 ML	312	if (rc)
	313	goto out;
	314
bbbee467	315	rc = crypto_register_shash(&sha256_alg);
6c833275 ML	316	if (rc)
	317	goto out_unreg1;
	318
	319	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");
	320
	321	return 0;
	322
	323	out_unreg1:
bbbee467	324	crypto_unregister_shash(&sha1_alg);
6c833275 ML	325	out:
	326	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	327	return rc;
	328	}
	329
	330	static void __exit padlock_fini(void)
	331	{
bbbee467 HX	332	crypto_unregister_shash(&sha1_alg);
bbbee467 HX	333	crypto_unregister_shash(&sha256_alg);
6c833275 ML	334	}
	335
	336	module_init(padlock_init);
	337	module_exit(padlock_fini);
	338
	339	MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
	340	MODULE_LICENSE("GPL");
	341	MODULE_AUTHOR("Michal Ludvig");
	342
a760a665 HX	343	MODULE_ALIAS("sha1-all");
a760a665 HX	344	MODULE_ALIAS("sha256-all");
6c833275 ML	345	MODULE_ALIAS("sha1-padlock");
6c833275 ML	346	MODULE_ALIAS("sha256-padlock");