[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);

static 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,
};

static 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,
};

static 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);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	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);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	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);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	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);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	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 void ctr_crypt_final(struct crypto_sparc64_aes_ctx *ctx,
			    struct blkcipher_walk *walk)
{
	u8 *ctrblk = walk->iv;
	u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
	u8 *src = walk->src.virt.addr;
	u8 *dst = walk->dst.virt.addr;
	unsigned int nbytes = walk->nbytes;

	ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,
			      keystream, AES_BLOCK_SIZE);
	crypto_xor((u8 *) keystream, src, nbytes);
	memcpy(dst, keystream, nbytes);
	crypto_inc(ctrblk, AES_BLOCK_SIZE);
}

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_block(desc, &walk, AES_BLOCK_SIZE);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
		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);
	}
	if (walk.nbytes) {
		ctr_crypt_final(ctx, &walk);
		err = blkcipher_walk_done(desc, &walk, 0);
	}
	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,
			.ivsize		= AES_BLOCK_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		= 1,
	.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,
			.ivsize		= AES_BLOCK_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("Rijndael (AES) Cipher Algorithm, sparc64 aes opcode accelerated");

MODULE_ALIAS_CRYPTO("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
756382cb	127	static struct aes_ops aes128_ops = {
0bdcaf74 DM	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	};
0bdcaf74 DM	138
756382cb	139	static struct aes_ops aes192_ops = {
0bdcaf74 DM	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	};
0bdcaf74 DM	150
756382cb	151	static struct aes_ops aes256_ops = {
0bdcaf74 DM	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);
b35d282e	225	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
9bf4852d	226
0bdcaf74	227	ctx->ops->load_encrypt_keys(&ctx->key[0]);
9bf4852d DM	228	while ((nbytes = walk.nbytes)) {
	229	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	230
	231	if (likely(block_len)) {
0bdcaf74 DM	232	ctx->ops->ecb_encrypt(&ctx->key[0],
	233	(const u64 *)walk.src.virt.addr,
	234	(u64 *) walk.dst.virt.addr,
	235	block_len);
9bf4852d DM	236	}
	237	nbytes &= AES_BLOCK_SIZE - 1;
	238	err = blkcipher_walk_done(desc, &walk, nbytes);
	239	}
	240	fprs_write(0);
	241	return err;
	242	}
	243
9bf4852d DM	244	static int ecb_decrypt(struct blkcipher_desc *desc,
	245	struct scatterlist dst, struct scatterlist src,
	246	unsigned int nbytes)
	247	{
	248	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	249	struct blkcipher_walk walk;
	250	u64 *key_end;
	251	int err;
	252
	253	blkcipher_walk_init(&walk, dst, src, nbytes);
	254	err = blkcipher_walk_virt(desc, &walk);
b35d282e	255	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
9bf4852d	256
0bdcaf74	257	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d DM	258	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	259	while ((nbytes = walk.nbytes)) {
	260	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	261
0bdcaf74 DM	262	if (likely(block_len)) {
	263	ctx->ops->ecb_decrypt(key_end,
	264	(const u64 *) walk.src.virt.addr,
	265	(u64 *) walk.dst.virt.addr, block_len);
	266	}
9bf4852d DM	267	nbytes &= AES_BLOCK_SIZE - 1;
	268	err = blkcipher_walk_done(desc, &walk, nbytes);
	269	}
	270	fprs_write(0);
	271
	272	return err;
	273	}
	274
9bf4852d DM	275	static int cbc_encrypt(struct blkcipher_desc *desc,
	276	struct scatterlist dst, struct scatterlist src,
	277	unsigned int nbytes)
	278	{
	279	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	280	struct blkcipher_walk walk;
	281	int err;
	282
	283	blkcipher_walk_init(&walk, dst, src, nbytes);
	284	err = blkcipher_walk_virt(desc, &walk);
b35d282e	285	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
9bf4852d	286
0bdcaf74	287	ctx->ops->load_encrypt_keys(&ctx->key[0]);
9bf4852d DM	288	while ((nbytes = walk.nbytes)) {
	289	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	290
	291	if (likely(block_len)) {
0bdcaf74 DM	292	ctx->ops->cbc_encrypt(&ctx->key[0],
	293	(const u64 *)walk.src.virt.addr,
	294	(u64 *) walk.dst.virt.addr,
	295	block_len, (u64 *) walk.iv);
9bf4852d DM	296	}
	297	nbytes &= AES_BLOCK_SIZE - 1;
	298	err = blkcipher_walk_done(desc, &walk, nbytes);
	299	}
	300	fprs_write(0);
	301	return err;
	302	}
	303
9bf4852d DM	304	static int cbc_decrypt(struct blkcipher_desc *desc,
	305	struct scatterlist dst, struct scatterlist src,
	306	unsigned int nbytes)
	307	{
	308	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	309	struct blkcipher_walk walk;
	310	u64 *key_end;
	311	int err;
	312
	313	blkcipher_walk_init(&walk, dst, src, nbytes);
	314	err = blkcipher_walk_virt(desc, &walk);
b35d282e	315	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
9bf4852d	316
0bdcaf74	317	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d DM	318	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	319	while ((nbytes = walk.nbytes)) {
	320	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	321
0bdcaf74 DM	322	if (likely(block_len)) {
	323	ctx->ops->cbc_decrypt(key_end,
	324	(const u64 *) walk.src.virt.addr,
	325	(u64 *) walk.dst.virt.addr,
	326	block_len, (u64 *) walk.iv);
	327	}
9bf4852d DM	328	nbytes &= AES_BLOCK_SIZE - 1;
	329	err = blkcipher_walk_done(desc, &walk, nbytes);
	330	}
	331	fprs_write(0);
	332
	333	return err;
	334	}
	335
a8d97cef DM	336	static void ctr_crypt_final(struct crypto_sparc64_aes_ctx *ctx,
	337	struct blkcipher_walk *walk)
	338	{
	339	u8 *ctrblk = walk->iv;
	340	u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
	341	u8 *src = walk->src.virt.addr;
	342	u8 *dst = walk->dst.virt.addr;
	343	unsigned int nbytes = walk->nbytes;
	344
	345	ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,
	346	keystream, AES_BLOCK_SIZE);
	347	crypto_xor((u8 *) keystream, src, nbytes);
	348	memcpy(dst, keystream, nbytes);
	349	crypto_inc(ctrblk, AES_BLOCK_SIZE);
	350	}
	351
9fd130ec DM	352	static int ctr_crypt(struct blkcipher_desc *desc,
	353	struct scatterlist dst, struct scatterlist src,
	354	unsigned int nbytes)
	355	{
	356	struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	357	struct blkcipher_walk walk;
	358	int err;
	359
	360	blkcipher_walk_init(&walk, dst, src, nbytes);
a8d97cef DM	361	err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
a8d97cef DM	362	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
9fd130ec DM	363
9fd130ec DM	364	ctx->ops->load_encrypt_keys(&ctx->key[0]);
a8d97cef	365	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
9fd130ec DM	366	unsigned int block_len = nbytes & AES_BLOCK_MASK;
	367
	368	if (likely(block_len)) {
	369	ctx->ops->ctr_crypt(&ctx->key[0],
	370	(const u64 *)walk.src.virt.addr,
	371	(u64 *) walk.dst.virt.addr,
	372	block_len, (u64 *) walk.iv);
	373	}
	374	nbytes &= AES_BLOCK_SIZE - 1;
	375	err = blkcipher_walk_done(desc, &walk, nbytes);
	376	}
a8d97cef DM	377	if (walk.nbytes) {
	378	ctr_crypt_final(ctx, &walk);
	379	err = blkcipher_walk_done(desc, &walk, 0);
	380	}
9fd130ec DM	381	fprs_write(0);
	382	return err;
	383	}
	384
9bf4852d DM	385	static struct crypto_alg algs[] = { {
	386	.cra_name = "aes",
	387	.cra_driver_name = "aes-sparc64",
10803624	388	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	389	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	390	.cra_blocksize = AES_BLOCK_SIZE,
	391	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	392	.cra_alignmask = 3,
	393	.cra_module = THIS_MODULE,
	394	.cra_u = {
	395	.cipher = {
	396	.cia_min_keysize = AES_MIN_KEY_SIZE,
	397	.cia_max_keysize = AES_MAX_KEY_SIZE,
	398	.cia_setkey = aes_set_key,
	399	.cia_encrypt = aes_encrypt,
	400	.cia_decrypt = aes_decrypt
	401	}
	402	}
	403	}, {
	404	.cra_name = "ecb(aes)",
	405	.cra_driver_name = "ecb-aes-sparc64",
10803624	406	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	407	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	408	.cra_blocksize = AES_BLOCK_SIZE,
	409	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	410	.cra_alignmask = 7,
	411	.cra_type = &crypto_blkcipher_type,
	412	.cra_module = THIS_MODULE,
	413	.cra_u = {
	414	.blkcipher = {
	415	.min_keysize = AES_MIN_KEY_SIZE,
	416	.max_keysize = AES_MAX_KEY_SIZE,
	417	.setkey = aes_set_key,
	418	.encrypt = ecb_encrypt,
	419	.decrypt = ecb_decrypt,
	420	},
	421	},
	422	}, {
	423	.cra_name = "cbc(aes)",
	424	.cra_driver_name = "cbc-aes-sparc64",
10803624	425	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	426	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	427	.cra_blocksize = AES_BLOCK_SIZE,
	428	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	429	.cra_alignmask = 7,
	430	.cra_type = &crypto_blkcipher_type,
	431	.cra_module = THIS_MODULE,
	432	.cra_u = {
	433	.blkcipher = {
	434	.min_keysize = AES_MIN_KEY_SIZE,
	435	.max_keysize = AES_MAX_KEY_SIZE,
a66d7f72	436	.ivsize = AES_BLOCK_SIZE,
9bf4852d DM	437	.setkey = aes_set_key,
	438	.encrypt = cbc_encrypt,
	439	.decrypt = cbc_decrypt,
	440	},
	441	},
9fd130ec DM	442	}, {
	443	.cra_name = "ctr(aes)",
	444	.cra_driver_name = "ctr-aes-sparc64",
10803624	445	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9fd130ec	446	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
a8d97cef	447	.cra_blocksize = 1,
9fd130ec DM	448	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	449	.cra_alignmask = 7,
	450	.cra_type = &crypto_blkcipher_type,
	451	.cra_module = THIS_MODULE,
	452	.cra_u = {
	453	.blkcipher = {
	454	.min_keysize = AES_MIN_KEY_SIZE,
	455	.max_keysize = AES_MAX_KEY_SIZE,
a66d7f72	456	.ivsize = AES_BLOCK_SIZE,
9fd130ec DM	457	.setkey = aes_set_key,
	458	.encrypt = ctr_crypt,
	459	.decrypt = ctr_crypt,
	460	},
	461	},
9bf4852d DM	462	} };
	463
	464	static bool __init sparc64_has_aes_opcode(void)
	465	{
	466	unsigned long cfr;
	467
	468	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
	469	return false;
	470
	471	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	472	if (!(cfr & CFR_AES))
	473	return false;
	474
	475	return true;
	476	}
	477
	478	static int __init aes_sparc64_mod_init(void)
	479	{
	480	int i;
	481
	482	for (i = 0; i < ARRAY_SIZE(algs); i++)
	483	INIT_LIST_HEAD(&algs[i].cra_list);
	484
	485	if (sparc64_has_aes_opcode()) {
	486	pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
	487	return crypto_register_algs(algs, ARRAY_SIZE(algs));
	488	}
	489	pr_info("sparc64 aes opcodes not available.\n");
	490	return -ENODEV;
	491	}
	492
	493	static void __exit aes_sparc64_mod_fini(void)
	494	{
	495	crypto_unregister_algs(algs, ARRAY_SIZE(algs));
	496	}
	497
	498	module_init(aes_sparc64_mod_init);
	499	module_exit(aes_sparc64_mod_fini);
	500
	501	MODULE_LICENSE("GPL");
b0126417	502	MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, sparc64 aes opcode accelerated");
9bf4852d	503
5d26a105	504	MODULE_ALIAS_CRYPTO("aes");
226f7cea DM	505
226f7cea DM	506	#include "crop_devid.c"