[deliverable/linux.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/padlock.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>

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>
21493088	16	#include <crypto/padlock.h>
5265eeb2	17	#include <crypto/sha.h>
6010439f	18	#include <linux/err.h>
6c833275 ML	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/errno.h>
6c833275 ML	22	#include <linux/interrupt.h>
	23	#include <linux/kernel.h>
	24	#include <linux/scatterlist.h>
e4914012	25	#include <asm/i387.h>
4c6ab3ee	26
bbbee467 HX	27	struct padlock_sha_desc {
bbbee467 HX	28	struct shash_desc fallback;
6c833275 ML	29	};
6c833275 ML	30
bbbee467 HX	31	struct padlock_sha_ctx {
	32	struct crypto_shash *fallback;
	33	};
6c833275	34
bbbee467	35	static int padlock_sha_init(struct shash_desc *desc)
6c833275	36	{
bbbee467 HX	37	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
bbbee467 HX	38	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
6c833275	39
bbbee467 HX	40	dctx->fallback.tfm = ctx->fallback;
	41	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	42	return crypto_shash_init(&dctx->fallback);
6c833275 ML	43	}
6c833275 ML	44
bbbee467 HX	45	static int padlock_sha_update(struct shash_desc *desc,
bbbee467 HX	46	const u8 *data, unsigned int length)
6c833275	47	{
bbbee467	48	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
6c833275	49
bbbee467 HX	50	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
bbbee467 HX	51	return crypto_shash_update(&dctx->fallback, data, length);
6c833275 ML	52	}
6c833275 ML	53
a8d7ac27 HX	54	static int padlock_sha_export(struct shash_desc desc, void out)
	55	{
	56	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	57
	58	return crypto_shash_export(&dctx->fallback, out);
	59	}
	60
	61	static int padlock_sha_import(struct shash_desc desc, const void in)
	62	{
	63	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	64	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
	65
	66	dctx->fallback.tfm = ctx->fallback;
	67	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	68	return crypto_shash_import(&dctx->fallback, in);
	69	}
	70
6c833275 ML	71	static inline void padlock_output_block(uint32_t *src,
	72	uint32_t *dst, size_t count)
	73	{
	74	while (count--)
	75	dst++ = swab32(src++);
	76	}
	77
bbbee467 HX	78	static int padlock_sha1_finup(struct shash_desc desc, const u8 in,
bbbee467 HX	79	unsigned int count, u8 *out)
6c833275 ML	80	{
	81	/* We can't store directly to out as it may be unaligned. /
	82	/* BTW Don't reduce the buffer size below 128 Bytes!
	83	* PadLock microcode needs it that big. */
4c6ab3ee HX	84	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	85	((aligned(STACK_ALIGN)));
	86	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	87	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	88	struct sha1_state state;
	89	unsigned int space;
	90	unsigned int leftover;
e4914012	91	int ts_state;
bbbee467 HX	92	int err;
	93
	94	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	95	err = crypto_shash_export(&dctx->fallback, &state);
	96	if (err)
	97	goto out;
	98
	99	if (state.count + count > ULONG_MAX)
	100	return crypto_shash_finup(&dctx->fallback, in, count, out);
	101
	102	leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1;
	103	space = SHA1_BLOCK_SIZE - leftover;
	104	if (space) {
	105	if (count > space) {
	106	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	107	crypto_shash_export(&dctx->fallback, &state);
	108	if (err)
	109	goto out;
	110	count -= space;
	111	in += space;
	112	} else {
	113	memcpy(state.buffer + leftover, in, count);
	114	in = state.buffer;
	115	count += leftover;
e9b25f16	116	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	117	}
	118	}
	119
	120	memcpy(result, &state.state, SHA1_DIGEST_SIZE);
6c833275	121
e4914012 SS	122	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	123	ts_state = irq_ts_save();
6c833275	124	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
bbbee467	125	: \
faae8908 HX	126	: "c"((unsigned long)state.count + count), \
faae8908 HX	127	"a"((unsigned long)state.count), \
bbbee467	128	"S"(in), "D"(result));
e4914012	129	irq_ts_restore(ts_state);
6c833275 ML	130
6c833275 ML	131	padlock_output_block((uint32_t )result, (uint32_t )out, 5);
bbbee467 HX	132
	133	out:
	134	return err;
6c833275 ML	135	}
6c833275 ML	136
bbbee467 HX	137	static int padlock_sha1_final(struct shash_desc desc, u8 out)
	138	{
	139	u8 buf[4];
	140
	141	return padlock_sha1_finup(desc, buf, 0, out);
	142	}
	143
	144	static int padlock_sha256_finup(struct shash_desc desc, const u8 in,
	145	unsigned int count, u8 *out)
6c833275 ML	146	{
	147	/* We can't store directly to out as it may be unaligned. /
	148	/* BTW Don't reduce the buffer size below 128 Bytes!
	149	* PadLock microcode needs it that big. */
4c6ab3ee HX	150	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	151	((aligned(STACK_ALIGN)));
	152	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	153	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	154	struct sha256_state state;
	155	unsigned int space;
	156	unsigned int leftover;
e4914012	157	int ts_state;
bbbee467	158	int err;
6c833275	159
bbbee467 HX	160	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	161	err = crypto_shash_export(&dctx->fallback, &state);
	162	if (err)
	163	goto out;
	164
	165	if (state.count + count > ULONG_MAX)
	166	return crypto_shash_finup(&dctx->fallback, in, count, out);
	167
	168	leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1;
	169	space = SHA256_BLOCK_SIZE - leftover;
	170	if (space) {
	171	if (count > space) {
	172	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	173	crypto_shash_export(&dctx->fallback, &state);
	174	if (err)
	175	goto out;
	176	count -= space;
	177	in += space;
	178	} else {
	179	memcpy(state.buf + leftover, in, count);
	180	in = state.buf;
	181	count += leftover;
e9b25f16	182	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	183	}
	184	}
	185
	186	memcpy(result, &state.state, SHA256_DIGEST_SIZE);
6c833275	187
e4914012 SS	188	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	189	ts_state = irq_ts_save();
6c833275	190	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
bbbee467	191	: \
faae8908 HX	192	: "c"((unsigned long)state.count + count), \
faae8908 HX	193	"a"((unsigned long)state.count), \
bbbee467	194	"S"(in), "D"(result));
e4914012	195	irq_ts_restore(ts_state);
6c833275 ML	196
6c833275 ML	197	padlock_output_block((uint32_t )result, (uint32_t )out, 8);
bbbee467 HX	198
	199	out:
	200	return err;
6c833275 ML	201	}
6c833275 ML	202
bbbee467	203	static int padlock_sha256_final(struct shash_desc desc, u8 out)
6c833275	204	{
bbbee467	205	u8 buf[4];
6c833275	206
bbbee467	207	return padlock_sha256_finup(desc, buf, 0, out);
6c833275 ML	208	}
6c833275 ML	209
6010439f	210	static int padlock_cra_init(struct crypto_tfm *tfm)
6c833275	211	{
bbbee467	212	struct crypto_shash *hash = __crypto_shash_cast(tfm);
6010439f	213	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
bbbee467	214	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608 HX	215	struct crypto_shash *fallback_tfm;
7d024608 HX	216	int err = -ENOMEM;
6010439f	217
6c833275	218	/* Allocate a fallback and abort if it failed. */
7d024608 HX	219	fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
7d024608 HX	220	CRYPTO_ALG_NEED_FALLBACK);
6010439f	221	if (IS_ERR(fallback_tfm)) {
6c833275 ML	222	printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
6c833275 ML	223	fallback_driver_name);
7d024608	224	err = PTR_ERR(fallback_tfm);
bbbee467	225	goto out;
6c833275 ML	226	}
6c833275 ML	227
bbbee467 HX	228	ctx->fallback = fallback_tfm;
bbbee467 HX	229	hash->descsize += crypto_shash_descsize(fallback_tfm);
6c833275	230	return 0;
7d024608	231
7d024608 HX	232	out:
7d024608 HX	233	return err;
6c833275 ML	234	}
6c833275 ML	235
6c833275 ML	236	static void padlock_cra_exit(struct crypto_tfm *tfm)
6c833275 ML	237	{
bbbee467	238	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608	239
bbbee467	240	crypto_free_shash(ctx->fallback);
6c833275 ML	241	}
6c833275 ML	242
bbbee467 HX	243	static struct shash_alg sha1_alg = {
	244	.digestsize = SHA1_DIGEST_SIZE,
	245	.init = padlock_sha_init,
	246	.update = padlock_sha_update,
	247	.finup = padlock_sha1_finup,
	248	.final = padlock_sha1_final,
a8d7ac27 HX	249	.export = padlock_sha_export,
a8d7ac27 HX	250	.import = padlock_sha_import,
bbbee467	251	.descsize = sizeof(struct padlock_sha_desc),
a8d7ac27	252	.statesize = sizeof(struct sha1_state),
bbbee467 HX	253	.base = {
	254	.cra_name = "sha1",
	255	.cra_driver_name = "sha1-padlock",
	256	.cra_priority = PADLOCK_CRA_PRIORITY,
	257	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	258	CRYPTO_ALG_NEED_FALLBACK,
	259	.cra_blocksize = SHA1_BLOCK_SIZE,
	260	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	261	.cra_module = THIS_MODULE,
	262	.cra_init = padlock_cra_init,
	263	.cra_exit = padlock_cra_exit,
6c833275 ML	264	}
	265	};
	266
bbbee467 HX	267	static struct shash_alg sha256_alg = {
	268	.digestsize = SHA256_DIGEST_SIZE,
	269	.init = padlock_sha_init,
	270	.update = padlock_sha_update,
	271	.finup = padlock_sha256_finup,
	272	.final = padlock_sha256_final,
a8d7ac27 HX	273	.export = padlock_sha_export,
a8d7ac27 HX	274	.import = padlock_sha_import,
bbbee467	275	.descsize = sizeof(struct padlock_sha_desc),
a8d7ac27	276	.statesize = sizeof(struct sha256_state),
bbbee467 HX	277	.base = {
	278	.cra_name = "sha256",
	279	.cra_driver_name = "sha256-padlock",
	280	.cra_priority = PADLOCK_CRA_PRIORITY,
	281	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	282	CRYPTO_ALG_NEED_FALLBACK,
	283	.cra_blocksize = SHA256_BLOCK_SIZE,
	284	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	285	.cra_module = THIS_MODULE,
	286	.cra_init = padlock_cra_init,
	287	.cra_exit = padlock_cra_exit,
6c833275 ML	288	}
	289	};
	290
6c833275 ML	291	static int __init padlock_init(void)
	292	{
	293	int rc = -ENODEV;
	294
	295	if (!cpu_has_phe) {
b43e726b	296	printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
6c833275 ML	297	return -ENODEV;
	298	}
	299
	300	if (!cpu_has_phe_enabled) {
b43e726b	301	printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
6c833275 ML	302	return -ENODEV;
	303	}
	304
bbbee467	305	rc = crypto_register_shash(&sha1_alg);
6c833275 ML	306	if (rc)
	307	goto out;
	308
bbbee467	309	rc = crypto_register_shash(&sha256_alg);
6c833275 ML	310	if (rc)
	311	goto out_unreg1;
	312
	313	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");
	314
	315	return 0;
	316
	317	out_unreg1:
bbbee467	318	crypto_unregister_shash(&sha1_alg);
6c833275 ML	319	out:
	320	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	321	return rc;
	322	}
	323
	324	static void __exit padlock_fini(void)
	325	{
bbbee467 HX	326	crypto_unregister_shash(&sha1_alg);
bbbee467 HX	327	crypto_unregister_shash(&sha256_alg);
6c833275 ML	328	}
	329
	330	module_init(padlock_init);
	331	module_exit(padlock_fini);
	332
	333	MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
	334	MODULE_LICENSE("GPL");
	335	MODULE_AUTHOR("Michal Ludvig");
	336
a760a665 HX	337	MODULE_ALIAS("sha1-all");
a760a665 HX	338	MODULE_ALIAS("sha256-all");
6c833275 ML	339	MODULE_ALIAS("sha1-padlock");
6c833275 ML	340	MODULE_ALIAS("sha256-padlock");