[deliverable/linux.git] / arch / sparc / crypto / aes_glue.c

/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
 *
 * This is based largely upon arch/x86/crypto/aesni-intel_glue.c
 *
 * Copyright (C) 2008, Intel Corp.
 *    Author: Huang Ying <ying.huang@intel.com>
 *
 * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
 * interface for 64-bit kernels.
 *    Authors: Adrian Hoban <adrian.hoban@intel.com>
 *             Gabriele Paoloni <gabriele.paoloni@intel.com>
 *             Tadeusz Struk (tadeusz.struk@intel.com)
 *             Aidan O'Mahony (aidan.o.mahony@intel.com)
 *    Copyright (c) 2010, Intel Corporation.
 */

#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt

#include <linux/crypto.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>

#include <asm/fpumacro.h>
#include <asm/pstate.h>
#include <asm/elf.h>

#include "opcodes.h"

struct aes_ops {
	void (*encrypt)(const u64 *key, const u32 *input, u32 *output);
	void (*decrypt)(const u64 *key, const u32 *input, u32 *output);
	void (*load_encrypt_keys)(const u64 *key);
	void (*load_decrypt_keys)(const u64 *key);
	void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output,
			    unsigned int len);
	void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output,
			    unsigned int len);
	void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output,
			    unsigned int len, u64 *iv);
	void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
			    unsigned int len, u64 *iv);
	void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output,
			  unsigned int len, u64 *iv);
};

struct crypto_sparc64_aes_ctx {
	struct aes_ops *ops;
	u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
	u32 key_length;
	u32 expanded_key_length;
};

extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input,
				    u32 *output);
extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input,
				    u32 *output);
extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input,
				    u32 *output);

extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input,
				    u32 *output);
extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input,
				    u32 *output);
extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input,
				    u32 *output);

extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);

extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);

extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);
extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);
extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);

extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);
extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);
extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input,
					u64 *output, unsigned int len);

extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
					u64 *output, unsigned int len,
					u64 *iv);

extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input,
				      u64 *output, unsigned int len,
				      u64 *iv);
extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input,
				      u64 *output, unsigned int len,
				      u64 *iv);
extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input,
				      u64 *output, unsigned int len,
				      u64 *iv);

struct aes_ops aes128_ops = {
	.encrypt		= aes_sparc64_encrypt_128,
	.decrypt		= aes_sparc64_decrypt_128,
	.load_encrypt_keys	= aes_sparc64_load_encrypt_keys_128,
	.load_decrypt_keys	= aes_sparc64_load_decrypt_keys_128,
	.ecb_encrypt		= aes_sparc64_ecb_encrypt_128,
	.ecb_decrypt		= aes_sparc64_ecb_decrypt_128,
	.cbc_encrypt		= aes_sparc64_cbc_encrypt_128,
	.cbc_decrypt		= aes_sparc64_cbc_decrypt_128,
	.ctr_crypt		= aes_sparc64_ctr_crypt_128,
};

struct aes_ops aes192_ops = {
	.encrypt		= aes_sparc64_encrypt_192,
	.decrypt		= aes_sparc64_decrypt_192,
	.load_encrypt_keys	= aes_sparc64_load_encrypt_keys_192,
	.load_decrypt_keys	= aes_sparc64_load_decrypt_keys_192,
	.ecb_encrypt		= aes_sparc64_ecb_encrypt_192,
	.ecb_decrypt		= aes_sparc64_ecb_decrypt_192,
	.cbc_encrypt		= aes_sparc64_cbc_encrypt_192,
	.cbc_decrypt		= aes_sparc64_cbc_decrypt_192,
	.ctr_crypt		= aes_sparc64_ctr_crypt_192,
};

struct aes_ops aes256_ops = {
	.encrypt		= aes_sparc64_encrypt_256,
	.decrypt		= aes_sparc64_decrypt_256,
	.load_encrypt_keys	= aes_sparc64_load_encrypt_keys_256,
	.load_decrypt_keys	= aes_sparc64_load_decrypt_keys_256,
	.ecb_encrypt		= aes_sparc64_ecb_encrypt_256,
	.ecb_decrypt		= aes_sparc64_ecb_decrypt_256,
	.cbc_encrypt		= aes_sparc64_cbc_encrypt_256,
	.cbc_decrypt		= aes_sparc64_cbc_decrypt_256,
	.ctr_crypt		= aes_sparc64_ctr_crypt_256,
};

extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
				   unsigned int key_len);

static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
		       unsigned int key_len)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;

	switch (key_len) {
	case AES_KEYSIZE_128:
		ctx->expanded_key_length = 0xb0;
		ctx->ops = &aes128_ops;
		break;

	case AES_KEYSIZE_192:
		ctx->expanded_key_length = 0xd0;
		ctx->ops = &aes192_ops;
		break;

	case AES_KEYSIZE_256:
		ctx->expanded_key_length = 0xf0;
		ctx->ops = &aes256_ops;
		break;

	default:
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
	ctx->key_length = key_len;

	return 0;
}

static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);

	ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
}

static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);

	ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
}

#define AES_BLOCK_MASK	(~(AES_BLOCK_SIZE-1))

static int ecb_encrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes)) {
		unsigned int block_len = nbytes & AES_BLOCK_MASK;

		if (likely(block_len)) {
			ctx->ops->ecb_encrypt(&ctx->key[0],
					      (const u64 *)walk.src.virt.addr,
					      (u64 *) walk.dst.virt.addr,
					      block_len);
		}
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	fprs_write(0);
	return err;
}

static int ecb_decrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;
	u64 *key_end;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);

	ctx->ops->load_decrypt_keys(&ctx->key[0]);
	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	while ((nbytes = walk.nbytes)) {
		unsigned int block_len = nbytes & AES_BLOCK_MASK;

		if (likely(block_len)) {
			ctx->ops->ecb_decrypt(key_end,
					      (const u64 *) walk.src.virt.addr,
					      (u64 *) walk.dst.virt.addr, block_len);
		}
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	fprs_write(0);

	return err;
}

static int cbc_encrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes)) {
		unsigned int block_len = nbytes & AES_BLOCK_MASK;

		if (likely(block_len)) {
			ctx->ops->cbc_encrypt(&ctx->key[0],
					      (const u64 *)walk.src.virt.addr,
					      (u64 *) walk.dst.virt.addr,
					      block_len, (u64 *) walk.iv);
		}
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	fprs_write(0);
	return err;
}

static int cbc_decrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;
	u64 *key_end;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);

	ctx->ops->load_decrypt_keys(&ctx->key[0]);
	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	while ((nbytes = walk.nbytes)) {
		unsigned int block_len = nbytes & AES_BLOCK_MASK;

		if (likely(block_len)) {
			ctx->ops->cbc_decrypt(key_end,
					      (const u64 *) walk.src.virt.addr,
					      (u64 *) walk.dst.virt.addr,
					      block_len, (u64 *) walk.iv);
		}
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	fprs_write(0);

	return err;
}

static int ctr_crypt(struct blkcipher_desc *desc,
		     struct scatterlist *dst, struct scatterlist *src,
		     unsigned int nbytes)
{
	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes)) {
		unsigned int block_len = nbytes & AES_BLOCK_MASK;

		if (likely(block_len)) {
			ctx->ops->ctr_crypt(&ctx->key[0],
					    (const u64 *)walk.src.virt.addr,
					    (u64 *) walk.dst.virt.addr,
					    block_len, (u64 *) walk.iv);
		}
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	fprs_write(0);
	return err;
}

static struct crypto_alg algs[] = { {
	.cra_name		= "aes",
	.cra_driver_name	= "aes-sparc64",
	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_sparc64_aes_ctx),
	.cra_alignmask		= 3,
	.cra_module		= THIS_MODULE,
	.cra_u	= {
		.cipher	= {
			.cia_min_keysize	= AES_MIN_KEY_SIZE,
			.cia_max_keysize	= AES_MAX_KEY_SIZE,
			.cia_setkey		= aes_set_key,
			.cia_encrypt		= aes_encrypt,
			.cia_decrypt		= aes_decrypt
		}
	}
}, {
	.cra_name		= "ecb(aes)",
	.cra_driver_name	= "ecb-aes-sparc64",
	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_sparc64_aes_ctx),
	.cra_alignmask		= 7,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= aes_set_key,
			.encrypt	= ecb_encrypt,
			.decrypt	= ecb_decrypt,
		},
	},
}, {
	.cra_name		= "cbc(aes)",
	.cra_driver_name	= "cbc-aes-sparc64",
	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_sparc64_aes_ctx),
	.cra_alignmask		= 7,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= aes_set_key,
			.encrypt	= cbc_encrypt,
			.decrypt	= cbc_decrypt,
		},
	},
}, {
	.cra_name		= "ctr(aes)",
	.cra_driver_name	= "ctr-aes-sparc64",
	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_sparc64_aes_ctx),
	.cra_alignmask		= 7,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= aes_set_key,
			.encrypt	= ctr_crypt,
			.decrypt	= ctr_crypt,
		},
	},
} };

static bool __init sparc64_has_aes_opcode(void)
{
	unsigned long cfr;

	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
		return false;

	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	if (!(cfr & CFR_AES))
		return false;

	return true;
}

static int __init aes_sparc64_mod_init(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(algs); i++)
		INIT_LIST_HEAD(&algs[i].cra_list);

	if (sparc64_has_aes_opcode()) {
		pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
		return crypto_register_algs(algs, ARRAY_SIZE(algs));
	}
	pr_info("sparc64 aes opcodes not available.\n");
	return -ENODEV;
}

static void __exit aes_sparc64_mod_fini(void)
{
	crypto_unregister_algs(algs, ARRAY_SIZE(algs));
}

module_init(aes_sparc64_mod_init);
module_exit(aes_sparc64_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("AES Secure Hash Algorithm, sparc64 aes opcode accelerated");

MODULE_ALIAS("aes");

#include "crop_devid.c"
Commit	Line	Data
9bf4852d DM	1	/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
	2	*
	3	* This is based largely upon arch/x86/crypto/aesni-intel_glue.c
	4	*
	5	* Copyright (C) 2008, Intel Corp.
	6	* Author: Huang Ying <ying.huang@intel.com>
	7	*
	8	* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
	9	* interface for 64-bit kernels.
	10	* Authors: Adrian Hoban <adrian.hoban@intel.com>
	11	* Gabriele Paoloni <gabriele.paoloni@intel.com>
	12	* Tadeusz Struk (tadeusz.struk@intel.com)
	13	* Aidan O'Mahony (aidan.o.mahony@intel.com)
	14	* Copyright (c) 2010, Intel Corporation.
	15	*/
	16
71741680 DM	17	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
71741680 DM	18
9bf4852d DM	19	#include <linux/crypto.h>
	20	#include <linux/init.h>
	21	#include <linux/module.h>
	22	#include <linux/mm.h>
	23	#include <linux/types.h>
	24	#include <crypto/algapi.h>
	25	#include <crypto/aes.h>
	26
	27	#include <asm/fpumacro.h>
	28	#include <asm/pstate.h>
	29	#include <asm/elf.h>
	30
10803624 DM	31	#include "opcodes.h"
10803624 DM	32
0bdcaf74 DM	33	struct aes_ops {
	34	void (encrypt)(const u64 key, const u32 input, u32 output);
	35	void (decrypt)(const u64 key, const u32 input, u32 output);
	36	void (load_encrypt_keys)(const u64 key);
	37	void (load_decrypt_keys)(const u64 key);
	38	void (ecb_encrypt)(const u64 key, const u64 input, u64 output,
	39	unsigned int len);
	40	void (ecb_decrypt)(const u64 key, const u64 input, u64 output,
	41	unsigned int len);
	42	void (cbc_encrypt)(const u64 key, const u64 input, u64 output,
	43	unsigned int len, u64 *iv);
	44	void (cbc_decrypt)(const u64 key, const u64 input, u64 output,
	45	unsigned int len, u64 *iv);
9fd130ec DM	46	void (ctr_crypt)(const u64 key, const u64 input, u64 output,
9fd130ec DM	47	unsigned int len, u64 *iv);
0bdcaf74 DM	48	};
0bdcaf74 DM	49
9bf4852d	50	struct crypto_sparc64_aes_ctx {
0bdcaf74	51	struct aes_ops *ops;
9bf4852d DM	52	u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
	53	u32 key_length;
	54	u32 expanded_key_length;
	55	};
	56
0bdcaf74 DM	57	extern void aes_sparc64_encrypt_128(const u64 key, const u32 input,
	58	u32 *output);
	59	extern void aes_sparc64_encrypt_192(const u64 key, const u32 input,
	60	u32 *output);
	61	extern void aes_sparc64_encrypt_256(const u64 key, const u32 input,
	62	u32 *output);
	63
	64	extern void aes_sparc64_decrypt_128(const u64 key, const u32 input,
	65	u32 *output);
	66	extern void aes_sparc64_decrypt_192(const u64 key, const u32 input,
	67	u32 *output);
	68	extern void aes_sparc64_decrypt_256(const u64 key, const u32 input,
	69	u32 *output);
	70
	71	extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
	72	extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
	73	extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
	74
	75	extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
	76	extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
	77	extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
	78
	79	extern void aes_sparc64_ecb_encrypt_128(const u64 key, const u64 input,
	80	u64 *output, unsigned int len);
	81	extern void aes_sparc64_ecb_encrypt_192(const u64 key, const u64 input,
	82	u64 *output, unsigned int len);
	83	extern void aes_sparc64_ecb_encrypt_256(const u64 key, const u64 input,
	84	u64 *output, unsigned int len);
	85
	86	extern void aes_sparc64_ecb_decrypt_128(const u64 key, const u64 input,
	87	u64 *output, unsigned int len);
	88	extern void aes_sparc64_ecb_decrypt_192(const u64 key, const u64 input,
	89	u64 *output, unsigned int len);
	90	extern void aes_sparc64_ecb_decrypt_256(const u64 key, const u64 input,
	91	u64 *output, unsigned int len);
	92
	93	extern void aes_sparc64_cbc_encrypt_128(const u64 key, const u64 input,
	94	u64 *output, unsigned int len,
	95	u64 *iv);
	96
	97	extern void aes_sparc64_cbc_encrypt_192(const u64 key, const u64 input,
	98	u64 *output, unsigned int len,
	99	u64 *iv);
	100
	101	extern void aes_sparc64_cbc_encrypt_256(const u64 key, const u64 input,
	102	u64 *output, unsigned int len,
	103	u64 *iv);
	104
	105	extern void aes_sparc64_cbc_decrypt_128(const u64 key, const u64 input,
	106	u64 *output, unsigned int len,
	107	u64 *iv);
	108
	109	extern void aes_sparc64_cbc_decrypt_192(const u64 key, const u64 input,
	110	u64 *output, unsigned int len,
	111	u64 *iv);
	112
	113	extern void aes_sparc64_cbc_decrypt_256(const u64 key, const u64 input,
	114	u64 *output, unsigned int len,
	115	u64 *iv);
	116
9fd130ec DM	117	extern void aes_sparc64_ctr_crypt_128(const u64 key, const u64 input,
	118	u64 *output, unsigned int len,
	119	u64 *iv);
	120	extern void aes_sparc64_ctr_crypt_192(const u64 key, const u64 input,
	121	u64 *output, unsigned int len,
	122	u64 *iv);
	123	extern void aes_sparc64_ctr_crypt_256(const u64 key, const u64 input,
	124	u64 *output, unsigned int len,
	125	u64 *iv);
	126
0bdcaf74 DM	127	struct aes_ops aes128_ops = {
	128	.encrypt = aes_sparc64_encrypt_128,
	129	.decrypt = aes_sparc64_decrypt_128,
	130	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
	131	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
	132	.ecb_encrypt = aes_sparc64_ecb_encrypt_128,
	133	.ecb_decrypt = aes_sparc64_ecb_decrypt_128,
	134	.cbc_encrypt = aes_sparc64_cbc_encrypt_128,
	135	.cbc_decrypt = aes_sparc64_cbc_decrypt_128,
9fd130ec	136	.ctr_crypt = aes_sparc64_ctr_crypt_128,
0bdcaf74 DM	137	};
	138
	139	struct aes_ops aes192_ops = {
	140	.encrypt = aes_sparc64_encrypt_192,
	141	.decrypt = aes_sparc64_decrypt_192,
	142	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
	143	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
	144	.ecb_encrypt = aes_sparc64_ecb_encrypt_192,
	145	.ecb_decrypt = aes_sparc64_ecb_decrypt_192,
	146	.cbc_encrypt = aes_sparc64_cbc_encrypt_192,
	147	.cbc_decrypt = aes_sparc64_cbc_decrypt_192,
9fd130ec	148	.ctr_crypt = aes_sparc64_ctr_crypt_192,
0bdcaf74 DM	149	};
	150
	151	struct aes_ops aes256_ops = {
	152	.encrypt = aes_sparc64_encrypt_256,
	153	.decrypt = aes_sparc64_decrypt_256,
	154	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
	155	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
	156	.ecb_encrypt = aes_sparc64_ecb_encrypt_256,
	157	.ecb_decrypt = aes_sparc64_ecb_decrypt_256,
	158	.cbc_encrypt = aes_sparc64_cbc_encrypt_256,
	159	.cbc_decrypt = aes_sparc64_cbc_decrypt_256,
9fd130ec	160	.ctr_crypt = aes_sparc64_ctr_crypt_256,
0bdcaf74 DM	161	};
0bdcaf74 DM	162
9bf4852d DM	163	extern void aes_sparc64_key_expand(const u32 in_key, u64 output_key,
	164	unsigned int key_len);
	165
	166	static int aes_set_key(struct crypto_tfm tfm, const u8 in_key,
	167	unsigned int key_len)
	168	{
	169	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	170	u32 *flags = &tfm->crt_flags;
	171
	172	switch (key_len) {
	173	case AES_KEYSIZE_128:
	174	ctx->expanded_key_length = 0xb0;
0bdcaf74	175	ctx->ops = &aes128_ops;
9bf4852d DM	176	break;
	177
	178	case AES_KEYSIZE_192:
	179	ctx->expanded_key_length = 0xd0;
0bdcaf74	180	ctx->ops = &aes192_ops;
9bf4852d DM	181	break;
	182
	183	case AES_KEYSIZE_256:
	184	ctx->expanded_key_length = 0xf0;
0bdcaf74	185	ctx->ops = &aes256_ops;
9bf4852d DM	186	break;
	187
	188	default:
	189	*flags \|= CRYPTO_TFM_RES_BAD_KEY_LEN;
	190	return -EINVAL;
	191	}
	192
	193	aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
	194	ctx->key_length = key_len;
	195
	196	return 0;
	197	}
	198
9bf4852d DM	199	static void aes_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	200	{
	201	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	202
0bdcaf74	203	ctx->ops->encrypt(&ctx->key[0], (const u32 ) src, (u32 ) dst);
9bf4852d DM	204	}
9bf4852d DM	205
9bf4852d DM	206	static void aes_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	207	{
	208	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	209
0bdcaf74	210	ctx->ops->decrypt(&ctx->key[0], (const u32 ) src, (u32 ) dst);
9bf4852d DM	211	}
9bf4852d DM	212
9bf4852d DM	213	#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
9bf4852d DM	214
9bf4852d DM	215	static int ecb_encrypt(struct blkcipher_desc *desc,
	216	struct scatterlist dst, struct scatterlist src,
	217	unsigned int nbytes)
	218	{
	219	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	220	struct blkcipher_walk walk;
	221	int err;
	222
	223	blkcipher_walk_init(&walk, dst, src, nbytes);
	224	err = blkcipher_walk_virt(desc, &walk);
	225
0bdcaf74	226	ctx->ops->load_encrypt_keys(&ctx->key[0]);
9bf4852d DM	227	while ((nbytes = walk.nbytes)) {
	228	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	229
	230	if (likely(block_len)) {
0bdcaf74 DM	231	ctx->ops->ecb_encrypt(&ctx->key[0],
	232	(const u64 *)walk.src.virt.addr,
	233	(u64 *) walk.dst.virt.addr,
	234	block_len);
9bf4852d DM	235	}
	236	nbytes &= AES_BLOCK_SIZE - 1;
	237	err = blkcipher_walk_done(desc, &walk, nbytes);
	238	}
	239	fprs_write(0);
	240	return err;
	241	}
	242
9bf4852d DM	243	static int ecb_decrypt(struct blkcipher_desc *desc,
	244	struct scatterlist dst, struct scatterlist src,
	245	unsigned int nbytes)
	246	{
	247	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	248	struct blkcipher_walk walk;
	249	u64 *key_end;
	250	int err;
	251
	252	blkcipher_walk_init(&walk, dst, src, nbytes);
	253	err = blkcipher_walk_virt(desc, &walk);
	254
0bdcaf74	255	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d DM	256	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	257	while ((nbytes = walk.nbytes)) {
	258	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	259
0bdcaf74 DM	260	if (likely(block_len)) {
	261	ctx->ops->ecb_decrypt(key_end,
	262	(const u64 *) walk.src.virt.addr,
	263	(u64 *) walk.dst.virt.addr, block_len);
	264	}
9bf4852d DM	265	nbytes &= AES_BLOCK_SIZE - 1;
	266	err = blkcipher_walk_done(desc, &walk, nbytes);
	267	}
	268	fprs_write(0);
	269
	270	return err;
	271	}
	272
9bf4852d DM	273	static int cbc_encrypt(struct blkcipher_desc *desc,
	274	struct scatterlist dst, struct scatterlist src,
	275	unsigned int nbytes)
	276	{
	277	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	278	struct blkcipher_walk walk;
	279	int err;
	280
	281	blkcipher_walk_init(&walk, dst, src, nbytes);
	282	err = blkcipher_walk_virt(desc, &walk);
	283
0bdcaf74	284	ctx->ops->load_encrypt_keys(&ctx->key[0]);
9bf4852d DM	285	while ((nbytes = walk.nbytes)) {
	286	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	287
	288	if (likely(block_len)) {
0bdcaf74 DM	289	ctx->ops->cbc_encrypt(&ctx->key[0],
	290	(const u64 *)walk.src.virt.addr,
	291	(u64 *) walk.dst.virt.addr,
	292	block_len, (u64 *) walk.iv);
9bf4852d DM	293	}
	294	nbytes &= AES_BLOCK_SIZE - 1;
	295	err = blkcipher_walk_done(desc, &walk, nbytes);
	296	}
	297	fprs_write(0);
	298	return err;
	299	}
	300
9bf4852d DM	301	static int cbc_decrypt(struct blkcipher_desc *desc,
	302	struct scatterlist dst, struct scatterlist src,
	303	unsigned int nbytes)
	304	{
	305	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	306	struct blkcipher_walk walk;
	307	u64 *key_end;
	308	int err;
	309
	310	blkcipher_walk_init(&walk, dst, src, nbytes);
	311	err = blkcipher_walk_virt(desc, &walk);
	312
0bdcaf74	313	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d DM	314	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	315	while ((nbytes = walk.nbytes)) {
	316	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	317
0bdcaf74 DM	318	if (likely(block_len)) {
	319	ctx->ops->cbc_decrypt(key_end,
	320	(const u64 *) walk.src.virt.addr,
	321	(u64 *) walk.dst.virt.addr,
	322	block_len, (u64 *) walk.iv);
	323	}
9bf4852d DM	324	nbytes &= AES_BLOCK_SIZE - 1;
	325	err = blkcipher_walk_done(desc, &walk, nbytes);
	326	}
	327	fprs_write(0);
	328
	329	return err;
	330	}
	331
9fd130ec DM	332	static int ctr_crypt(struct blkcipher_desc *desc,
	333	struct scatterlist dst, struct scatterlist src,
	334	unsigned int nbytes)
	335	{
	336	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	337	struct blkcipher_walk walk;
	338	int err;
	339
	340	blkcipher_walk_init(&walk, dst, src, nbytes);
	341	err = blkcipher_walk_virt(desc, &walk);
	342
	343	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	344	while ((nbytes = walk.nbytes)) {
	345	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	346
	347	if (likely(block_len)) {
	348	ctx->ops->ctr_crypt(&ctx->key[0],
	349	(const u64 *)walk.src.virt.addr,
	350	(u64 *) walk.dst.virt.addr,
	351	block_len, (u64 *) walk.iv);
	352	}
	353	nbytes &= AES_BLOCK_SIZE - 1;
	354	err = blkcipher_walk_done(desc, &walk, nbytes);
	355	}
	356	fprs_write(0);
	357	return err;
	358	}
	359
9bf4852d DM	360	static struct crypto_alg algs[] = { {
	361	.cra_name = "aes",
	362	.cra_driver_name = "aes-sparc64",
10803624	363	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	364	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	365	.cra_blocksize = AES_BLOCK_SIZE,
	366	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	367	.cra_alignmask = 3,
	368	.cra_module = THIS_MODULE,
	369	.cra_u = {
	370	.cipher = {
	371	.cia_min_keysize = AES_MIN_KEY_SIZE,
	372	.cia_max_keysize = AES_MAX_KEY_SIZE,
	373	.cia_setkey = aes_set_key,
	374	.cia_encrypt = aes_encrypt,
	375	.cia_decrypt = aes_decrypt
	376	}
	377	}
	378	}, {
	379	.cra_name = "ecb(aes)",
	380	.cra_driver_name = "ecb-aes-sparc64",
10803624	381	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	382	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	383	.cra_blocksize = AES_BLOCK_SIZE,
	384	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	385	.cra_alignmask = 7,
	386	.cra_type = &crypto_blkcipher_type,
	387	.cra_module = THIS_MODULE,
	388	.cra_u = {
	389	.blkcipher = {
	390	.min_keysize = AES_MIN_KEY_SIZE,
	391	.max_keysize = AES_MAX_KEY_SIZE,
	392	.setkey = aes_set_key,
	393	.encrypt = ecb_encrypt,
	394	.decrypt = ecb_decrypt,
	395	},
	396	},
	397	}, {
	398	.cra_name = "cbc(aes)",
	399	.cra_driver_name = "cbc-aes-sparc64",
10803624	400	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	401	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	402	.cra_blocksize = AES_BLOCK_SIZE,
	403	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	404	.cra_alignmask = 7,
	405	.cra_type = &crypto_blkcipher_type,
	406	.cra_module = THIS_MODULE,
	407	.cra_u = {
	408	.blkcipher = {
	409	.min_keysize = AES_MIN_KEY_SIZE,
	410	.max_keysize = AES_MAX_KEY_SIZE,
	411	.setkey = aes_set_key,
	412	.encrypt = cbc_encrypt,
	413	.decrypt = cbc_decrypt,
	414	},
	415	},
9fd130ec DM	416	}, {
	417	.cra_name = "ctr(aes)",
	418	.cra_driver_name = "ctr-aes-sparc64",
10803624	419	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9fd130ec DM	420	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	421	.cra_blocksize = AES_BLOCK_SIZE,
	422	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	423	.cra_alignmask = 7,
	424	.cra_type = &crypto_blkcipher_type,
	425	.cra_module = THIS_MODULE,
	426	.cra_u = {
	427	.blkcipher = {
	428	.min_keysize = AES_MIN_KEY_SIZE,
	429	.max_keysize = AES_MAX_KEY_SIZE,
	430	.setkey = aes_set_key,
	431	.encrypt = ctr_crypt,
	432	.decrypt = ctr_crypt,
	433	},
	434	},
9bf4852d DM	435	} };
	436
	437	static bool __init sparc64_has_aes_opcode(void)
	438	{
	439	unsigned long cfr;
	440
	441	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
	442	return false;
	443
	444	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	445	if (!(cfr & CFR_AES))
	446	return false;
	447
	448	return true;
	449	}
	450
	451	static int __init aes_sparc64_mod_init(void)
	452	{
	453	int i;
	454
	455	for (i = 0; i < ARRAY_SIZE(algs); i++)
	456	INIT_LIST_HEAD(&algs[i].cra_list);
	457
	458	if (sparc64_has_aes_opcode()) {
	459	pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
	460	return crypto_register_algs(algs, ARRAY_SIZE(algs));
	461	}
	462	pr_info("sparc64 aes opcodes not available.\n");
	463	return -ENODEV;
	464	}
	465
	466	static void __exit aes_sparc64_mod_fini(void)
	467	{
	468	crypto_unregister_algs(algs, ARRAY_SIZE(algs));
	469	}
	470
	471	module_init(aes_sparc64_mod_init);
	472	module_exit(aes_sparc64_mod_fini);
	473
	474	MODULE_LICENSE("GPL");
	475	MODULE_DESCRIPTION("AES Secure Hash Algorithm, sparc64 aes opcode accelerated");
	476
	477	MODULE_ALIAS("aes");
226f7cea DM	478
226f7cea DM	479	#include "crop_devid.c"