[linux-block.git] / arch / sparc / crypto / aes_glue.c

// SPDX-License-Identifier: GPL-2.0-only
/* 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 <crypto/internal/skcipher.h>

#include <asm/fpumacro.h>
#include <asm/opcodes.h>
#include <asm/pstate.h>
#include <asm/elf.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);

	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:
		return -EINVAL;
	}

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

	return 0;
}

static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
				unsigned int key_len)
{
	return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
}

static void crypto_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 crypto_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);
}

static int ecb_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
		return err;

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes) != 0) {
		ctx->ops->ecb_encrypt(&ctx->key[0], walk.src.virt.addr,
				      walk.dst.virt.addr,
				      round_down(nbytes, AES_BLOCK_SIZE));
		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
}

static int ecb_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	const u64 *key_end;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
		return err;

	ctx->ops->load_decrypt_keys(&ctx->key[0]);
	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	while ((nbytes = walk.nbytes) != 0) {
		ctx->ops->ecb_decrypt(key_end, walk.src.virt.addr,
				      walk.dst.virt.addr,
				      round_down(nbytes, AES_BLOCK_SIZE));
		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
	}
	fprs_write(0);

	return err;
}

static int cbc_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
		return err;

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes) != 0) {
		ctx->ops->cbc_encrypt(&ctx->key[0], walk.src.virt.addr,
				      walk.dst.virt.addr,
				      round_down(nbytes, AES_BLOCK_SIZE),
				      walk.iv);
		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
}

static int cbc_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	const u64 *key_end;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
		return err;

	ctx->ops->load_decrypt_keys(&ctx->key[0]);
	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
	while ((nbytes = walk.nbytes) != 0) {
		ctx->ops->cbc_decrypt(key_end, walk.src.virt.addr,
				      walk.dst.virt.addr,
				      round_down(nbytes, AES_BLOCK_SIZE),
				      walk.iv);
		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
	}
	fprs_write(0);

	return err;
}

static void ctr_crypt_final(const struct crypto_sparc64_aes_ctx *ctx,
			    struct skcipher_walk *walk)
{
	u8 *ctrblk = walk->iv;
	u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
	const 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_cpy(dst, (u8 *) keystream, src, nbytes);
	crypto_inc(ctrblk, AES_BLOCK_SIZE);
}

static int ctr_crypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
		return err;

	ctx->ops->load_encrypt_keys(&ctx->key[0]);
	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
		ctx->ops->ctr_crypt(&ctx->key[0], walk.src.virt.addr,
				    walk.dst.virt.addr,
				    round_down(nbytes, AES_BLOCK_SIZE),
				    walk.iv);
		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
	}
	if (walk.nbytes) {
		ctr_crypt_final(ctx, &walk);
		err = skcipher_walk_done(&walk, 0);
	}
	fprs_write(0);
	return err;
}

static struct crypto_alg cipher_alg = {
	.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		= crypto_aes_encrypt,
			.cia_decrypt		= crypto_aes_decrypt
		}
	}
};

static struct skcipher_alg skcipher_algs[] = {
	{
		.base.cra_name		= "ecb(aes)",
		.base.cra_driver_name	= "ecb-aes-sparc64",
		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
		.base.cra_blocksize	= AES_BLOCK_SIZE,
		.base.cra_ctxsize	= sizeof(struct crypto_sparc64_aes_ctx),
		.base.cra_alignmask	= 7,
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= AES_MIN_KEY_SIZE,
		.max_keysize		= AES_MAX_KEY_SIZE,
		.setkey			= aes_set_key_skcipher,
		.encrypt		= ecb_encrypt,
		.decrypt		= ecb_decrypt,
	}, {
		.base.cra_name		= "cbc(aes)",
		.base.cra_driver_name	= "cbc-aes-sparc64",
		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
		.base.cra_blocksize	= AES_BLOCK_SIZE,
		.base.cra_ctxsize	= sizeof(struct crypto_sparc64_aes_ctx),
		.base.cra_alignmask	= 7,
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= AES_MIN_KEY_SIZE,
		.max_keysize		= AES_MAX_KEY_SIZE,
		.ivsize			= AES_BLOCK_SIZE,
		.setkey			= aes_set_key_skcipher,
		.encrypt		= cbc_encrypt,
		.decrypt		= cbc_decrypt,
	}, {
		.base.cra_name		= "ctr(aes)",
		.base.cra_driver_name	= "ctr-aes-sparc64",
		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
		.base.cra_blocksize	= 1,
		.base.cra_ctxsize	= sizeof(struct crypto_sparc64_aes_ctx),
		.base.cra_alignmask	= 7,
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= AES_MIN_KEY_SIZE,
		.max_keysize		= AES_MAX_KEY_SIZE,
		.ivsize			= AES_BLOCK_SIZE,
		.setkey			= aes_set_key_skcipher,
		.encrypt		= ctr_crypt,
		.decrypt		= ctr_crypt,
		.chunksize		= AES_BLOCK_SIZE,
	}
};

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 err;

	if (!sparc64_has_aes_opcode()) {
		pr_info("sparc64 aes opcodes not available.\n");
		return -ENODEV;
	}
	pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
	err = crypto_register_alg(&cipher_alg);
	if (err)
		return err;
	err = crypto_register_skciphers(skcipher_algs,
					ARRAY_SIZE(skcipher_algs));
	if (err)
		crypto_unregister_alg(&cipher_alg);
	return err;
}

static void __exit aes_sparc64_mod_fini(void)
{
	crypto_unregister_alg(&cipher_alg);
	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_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
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
9bf4852d DM	2	/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
	3	*
	4	* This is based largely upon arch/x86/crypto/aesni-intel_glue.c
	5	*
	6	* Copyright (C) 2008, Intel Corp.
	7	* Author: Huang Ying <ying.huang@intel.com>
	8	*
	9	* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
	10	* interface for 64-bit kernels.
	11	* Authors: Adrian Hoban <adrian.hoban@intel.com>
	12	* Gabriele Paoloni <gabriele.paoloni@intel.com>
	13	* Tadeusz Struk (tadeusz.struk@intel.com)
	14	* Aidan O'Mahony (aidan.o.mahony@intel.com)
	15	* Copyright (c) 2010, Intel Corporation.
	16	*/
	17
71741680 DM	18	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
71741680 DM	19
9bf4852d DM	20	#include <linux/crypto.h>
	21	#include <linux/init.h>
	22	#include <linux/module.h>
	23	#include <linux/mm.h>
	24	#include <linux/types.h>
	25	#include <crypto/algapi.h>
	26	#include <crypto/aes.h>
64db5e74	27	#include <crypto/internal/skcipher.h>
9bf4852d DM	28
9bf4852d DM	29	#include <asm/fpumacro.h>
77735920	30	#include <asm/opcodes.h>
9bf4852d DM	31	#include <asm/pstate.h>
	32	#include <asm/elf.h>
	33
0bdcaf74 DM	34	struct aes_ops {
	35	void (encrypt)(const u64 key, const u32 input, u32 output);
	36	void (decrypt)(const u64 key, const u32 input, u32 output);
	37	void (load_encrypt_keys)(const u64 key);
	38	void (load_decrypt_keys)(const u64 key);
	39	void (ecb_encrypt)(const u64 key, const u64 input, u64 output,
	40	unsigned int len);
	41	void (ecb_decrypt)(const u64 key, const u64 input, u64 output,
	42	unsigned int len);
	43	void (cbc_encrypt)(const u64 key, const u64 input, u64 output,
	44	unsigned int len, u64 *iv);
	45	void (cbc_decrypt)(const u64 key, const u64 input, u64 output,
	46	unsigned int len, u64 *iv);
9fd130ec DM	47	void (ctr_crypt)(const u64 key, const u64 input, u64 output,
9fd130ec DM	48	unsigned int len, u64 *iv);
0bdcaf74 DM	49	};
0bdcaf74 DM	50
9bf4852d	51	struct crypto_sparc64_aes_ctx {
0bdcaf74	52	struct aes_ops *ops;
9bf4852d DM	53	u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
	54	u32 key_length;
	55	u32 expanded_key_length;
	56	};
	57
0bdcaf74 DM	58	extern void aes_sparc64_encrypt_128(const u64 key, const u32 input,
	59	u32 *output);
	60	extern void aes_sparc64_encrypt_192(const u64 key, const u32 input,
	61	u32 *output);
	62	extern void aes_sparc64_encrypt_256(const u64 key, const u32 input,
	63	u32 *output);
	64
	65	extern void aes_sparc64_decrypt_128(const u64 key, const u32 input,
	66	u32 *output);
	67	extern void aes_sparc64_decrypt_192(const u64 key, const u32 input,
	68	u32 *output);
	69	extern void aes_sparc64_decrypt_256(const u64 key, const u32 input,
	70	u32 *output);
	71
	72	extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
	73	extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
	74	extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
	75
	76	extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
	77	extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
	78	extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
	79
	80	extern void aes_sparc64_ecb_encrypt_128(const u64 key, const u64 input,
	81	u64 *output, unsigned int len);
	82	extern void aes_sparc64_ecb_encrypt_192(const u64 key, const u64 input,
	83	u64 *output, unsigned int len);
	84	extern void aes_sparc64_ecb_encrypt_256(const u64 key, const u64 input,
	85	u64 *output, unsigned int len);
	86
	87	extern void aes_sparc64_ecb_decrypt_128(const u64 key, const u64 input,
	88	u64 *output, unsigned int len);
	89	extern void aes_sparc64_ecb_decrypt_192(const u64 key, const u64 input,
	90	u64 *output, unsigned int len);
	91	extern void aes_sparc64_ecb_decrypt_256(const u64 key, const u64 input,
	92	u64 *output, unsigned int len);
	93
	94	extern void aes_sparc64_cbc_encrypt_128(const u64 key, const u64 input,
	95	u64 *output, unsigned int len,
	96	u64 *iv);
	97
	98	extern void aes_sparc64_cbc_encrypt_192(const u64 key, const u64 input,
	99	u64 *output, unsigned int len,
	100	u64 *iv);
	101
	102	extern void aes_sparc64_cbc_encrypt_256(const u64 key, const u64 input,
	103	u64 *output, unsigned int len,
	104	u64 *iv);
	105
	106	extern void aes_sparc64_cbc_decrypt_128(const u64 key, const u64 input,
	107	u64 *output, unsigned int len,
	108	u64 *iv);
	109
	110	extern void aes_sparc64_cbc_decrypt_192(const u64 key, const u64 input,
	111	u64 *output, unsigned int len,
	112	u64 *iv);
	113
	114	extern void aes_sparc64_cbc_decrypt_256(const u64 key, const u64 input,
	115	u64 *output, unsigned int len,
	116	u64 *iv);
	117
9fd130ec DM	118	extern void aes_sparc64_ctr_crypt_128(const u64 key, const u64 input,
	119	u64 *output, unsigned int len,
	120	u64 *iv);
	121	extern void aes_sparc64_ctr_crypt_192(const u64 key, const u64 input,
	122	u64 *output, unsigned int len,
	123	u64 *iv);
	124	extern void aes_sparc64_ctr_crypt_256(const u64 key, const u64 input,
	125	u64 *output, unsigned int len,
	126	u64 *iv);
	127
756382cb	128	static struct aes_ops aes128_ops = {
0bdcaf74 DM	129	.encrypt = aes_sparc64_encrypt_128,
	130	.decrypt = aes_sparc64_decrypt_128,
	131	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
	132	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
	133	.ecb_encrypt = aes_sparc64_ecb_encrypt_128,
	134	.ecb_decrypt = aes_sparc64_ecb_decrypt_128,
	135	.cbc_encrypt = aes_sparc64_cbc_encrypt_128,
	136	.cbc_decrypt = aes_sparc64_cbc_decrypt_128,
9fd130ec	137	.ctr_crypt = aes_sparc64_ctr_crypt_128,
0bdcaf74 DM	138	};
0bdcaf74 DM	139
756382cb	140	static struct aes_ops aes192_ops = {
0bdcaf74 DM	141	.encrypt = aes_sparc64_encrypt_192,
	142	.decrypt = aes_sparc64_decrypt_192,
	143	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
	144	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
	145	.ecb_encrypt = aes_sparc64_ecb_encrypt_192,
	146	.ecb_decrypt = aes_sparc64_ecb_decrypt_192,
	147	.cbc_encrypt = aes_sparc64_cbc_encrypt_192,
	148	.cbc_decrypt = aes_sparc64_cbc_decrypt_192,
9fd130ec	149	.ctr_crypt = aes_sparc64_ctr_crypt_192,
0bdcaf74 DM	150	};
0bdcaf74 DM	151
756382cb	152	static struct aes_ops aes256_ops = {
0bdcaf74 DM	153	.encrypt = aes_sparc64_encrypt_256,
	154	.decrypt = aes_sparc64_decrypt_256,
	155	.load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
	156	.load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
	157	.ecb_encrypt = aes_sparc64_ecb_encrypt_256,
	158	.ecb_decrypt = aes_sparc64_ecb_decrypt_256,
	159	.cbc_encrypt = aes_sparc64_cbc_encrypt_256,
	160	.cbc_decrypt = aes_sparc64_cbc_decrypt_256,
9fd130ec	161	.ctr_crypt = aes_sparc64_ctr_crypt_256,
0bdcaf74 DM	162	};
0bdcaf74 DM	163
9bf4852d DM	164	extern void aes_sparc64_key_expand(const u32 in_key, u64 output_key,
	165	unsigned int key_len);
	166
	167	static int aes_set_key(struct crypto_tfm tfm, const u8 in_key,
	168	unsigned int key_len)
	169	{
	170	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
9bf4852d DM	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:
9bf4852d DM	189	return -EINVAL;
	190	}
	191
	192	aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
	193	ctx->key_length = key_len;
	194
	195	return 0;
	196	}
	197
64db5e74 EB	198	static int aes_set_key_skcipher(struct crypto_skcipher tfm, const u8 in_key,
	199	unsigned int key_len)
	200	{
	201	return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
	202	}
	203
724ecd3c	204	static void crypto_aes_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
9bf4852d DM	205	{
	206	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	207
0bdcaf74	208	ctx->ops->encrypt(&ctx->key[0], (const u32 ) src, (u32 ) dst);
9bf4852d DM	209	}
9bf4852d DM	210
724ecd3c	211	static void crypto_aes_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
9bf4852d DM	212	{
	213	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
	214
0bdcaf74	215	ctx->ops->decrypt(&ctx->key[0], (const u32 ) src, (u32 ) dst);
9bf4852d DM	216	}
9bf4852d DM	217
64db5e74	218	static int ecb_encrypt(struct skcipher_request *req)
9bf4852d	219	{
64db5e74 EB	220	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	221	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	222	struct skcipher_walk walk;
	223	unsigned int nbytes;
9bf4852d DM	224	int err;
9bf4852d DM	225
64db5e74 EB	226	err = skcipher_walk_virt(&walk, req, true);
	227	if (err)
	228	return err;
9bf4852d	229
0bdcaf74	230	ctx->ops->load_encrypt_keys(&ctx->key[0]);
64db5e74 EB	231	while ((nbytes = walk.nbytes) != 0) {
	232	ctx->ops->ecb_encrypt(&ctx->key[0], walk.src.virt.addr,
	233	walk.dst.virt.addr,
	234	round_down(nbytes, AES_BLOCK_SIZE));
	235	err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
9bf4852d DM	236	}
	237	fprs_write(0);
	238	return err;
	239	}
	240
64db5e74	241	static int ecb_decrypt(struct skcipher_request *req)
9bf4852d	242	{
64db5e74 EB	243	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	244	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	245	const u64 *key_end;
	246	struct skcipher_walk walk;
	247	unsigned int nbytes;
9bf4852d DM	248	int err;
9bf4852d DM	249
64db5e74 EB	250	err = skcipher_walk_virt(&walk, req, true);
	251	if (err)
	252	return err;
9bf4852d	253
0bdcaf74	254	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d	255	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
64db5e74 EB	256	while ((nbytes = walk.nbytes) != 0) {
	257	ctx->ops->ecb_decrypt(key_end, walk.src.virt.addr,
	258	walk.dst.virt.addr,
	259	round_down(nbytes, AES_BLOCK_SIZE));
	260	err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
9bf4852d DM	261	}
	262	fprs_write(0);
	263
	264	return err;
	265	}
	266
64db5e74	267	static int cbc_encrypt(struct skcipher_request *req)
9bf4852d	268	{
64db5e74 EB	269	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	270	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	271	struct skcipher_walk walk;
	272	unsigned int nbytes;
9bf4852d DM	273	int err;
9bf4852d DM	274
64db5e74 EB	275	err = skcipher_walk_virt(&walk, req, true);
	276	if (err)
	277	return err;
9bf4852d	278
0bdcaf74	279	ctx->ops->load_encrypt_keys(&ctx->key[0]);
64db5e74 EB	280	while ((nbytes = walk.nbytes) != 0) {
	281	ctx->ops->cbc_encrypt(&ctx->key[0], walk.src.virt.addr,
	282	walk.dst.virt.addr,
	283	round_down(nbytes, AES_BLOCK_SIZE),
	284	walk.iv);
	285	err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
9bf4852d DM	286	}
	287	fprs_write(0);
	288	return err;
	289	}
	290
64db5e74	291	static int cbc_decrypt(struct skcipher_request *req)
9bf4852d	292	{
64db5e74 EB	293	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	294	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	295	const u64 *key_end;
	296	struct skcipher_walk walk;
	297	unsigned int nbytes;
9bf4852d DM	298	int err;
9bf4852d DM	299
64db5e74 EB	300	err = skcipher_walk_virt(&walk, req, true);
	301	if (err)
	302	return err;
9bf4852d	303
0bdcaf74	304	ctx->ops->load_decrypt_keys(&ctx->key[0]);
9bf4852d	305	key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
64db5e74 EB	306	while ((nbytes = walk.nbytes) != 0) {
	307	ctx->ops->cbc_decrypt(key_end, walk.src.virt.addr,
	308	walk.dst.virt.addr,
	309	round_down(nbytes, AES_BLOCK_SIZE),
	310	walk.iv);
	311	err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
9bf4852d DM	312	}
	313	fprs_write(0);
	314
	315	return err;
	316	}
	317
64db5e74 EB	318	static void ctr_crypt_final(const struct crypto_sparc64_aes_ctx *ctx,
64db5e74 EB	319	struct skcipher_walk *walk)
a8d97cef DM	320	{
	321	u8 *ctrblk = walk->iv;
	322	u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
37d45180	323	const u8 *src = walk->src.virt.addr;
a8d97cef DM	324	u8 *dst = walk->dst.virt.addr;
	325	unsigned int nbytes = walk->nbytes;
	326
	327	ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,
	328	keystream, AES_BLOCK_SIZE);
45fe93df	329	crypto_xor_cpy(dst, (u8 *) keystream, src, nbytes);
a8d97cef DM	330	crypto_inc(ctrblk, AES_BLOCK_SIZE);
	331	}
	332
64db5e74	333	static int ctr_crypt(struct skcipher_request *req)
9fd130ec	334	{
64db5e74 EB	335	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	336	const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
	337	struct skcipher_walk walk;
	338	unsigned int nbytes;
9fd130ec DM	339	int err;
9fd130ec DM	340
64db5e74 EB	341	err = skcipher_walk_virt(&walk, req, true);
	342	if (err)
	343	return err;
9fd130ec DM	344
9fd130ec DM	345	ctx->ops->load_encrypt_keys(&ctx->key[0]);
a8d97cef	346	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
64db5e74 EB	347	ctx->ops->ctr_crypt(&ctx->key[0], walk.src.virt.addr,
	348	walk.dst.virt.addr,
	349	round_down(nbytes, AES_BLOCK_SIZE),
	350	walk.iv);
	351	err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
9fd130ec	352	}
a8d97cef DM	353	if (walk.nbytes) {
a8d97cef DM	354	ctr_crypt_final(ctx, &walk);
64db5e74	355	err = skcipher_walk_done(&walk, 0);
a8d97cef	356	}
9fd130ec DM	357	fprs_write(0);
	358	return err;
	359	}
	360
64db5e74	361	static struct crypto_alg cipher_alg = {
9bf4852d DM	362	.cra_name = "aes",
9bf4852d DM	363	.cra_driver_name = "aes-sparc64",
10803624	364	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
9bf4852d DM	365	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	366	.cra_blocksize = AES_BLOCK_SIZE,
	367	.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	368	.cra_alignmask = 3,
	369	.cra_module = THIS_MODULE,
	370	.cra_u = {
	371	.cipher = {
	372	.cia_min_keysize = AES_MIN_KEY_SIZE,
	373	.cia_max_keysize = AES_MAX_KEY_SIZE,
	374	.cia_setkey = aes_set_key,
724ecd3c AB	375	.cia_encrypt = crypto_aes_encrypt,
724ecd3c AB	376	.cia_decrypt = crypto_aes_decrypt
9bf4852d DM	377	}
9bf4852d DM	378	}
64db5e74 EB	379	};
	380
	381	static struct skcipher_alg skcipher_algs[] = {
	382	{
	383	.base.cra_name = "ecb(aes)",
	384	.base.cra_driver_name = "ecb-aes-sparc64",
	385	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	386	.base.cra_blocksize = AES_BLOCK_SIZE,
	387	.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	388	.base.cra_alignmask = 7,
	389	.base.cra_module = THIS_MODULE,
	390	.min_keysize = AES_MIN_KEY_SIZE,
	391	.max_keysize = AES_MAX_KEY_SIZE,
	392	.setkey = aes_set_key_skcipher,
	393	.encrypt = ecb_encrypt,
	394	.decrypt = ecb_decrypt,
	395	}, {
	396	.base.cra_name = "cbc(aes)",
	397	.base.cra_driver_name = "cbc-aes-sparc64",
	398	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	399	.base.cra_blocksize = AES_BLOCK_SIZE,
	400	.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	401	.base.cra_alignmask = 7,
	402	.base.cra_module = THIS_MODULE,
	403	.min_keysize = AES_MIN_KEY_SIZE,
	404	.max_keysize = AES_MAX_KEY_SIZE,
	405	.ivsize = AES_BLOCK_SIZE,
	406	.setkey = aes_set_key_skcipher,
	407	.encrypt = cbc_encrypt,
	408	.decrypt = cbc_decrypt,
	409	}, {
	410	.base.cra_name = "ctr(aes)",
	411	.base.cra_driver_name = "ctr-aes-sparc64",
	412	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	413	.base.cra_blocksize = 1,
	414	.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
	415	.base.cra_alignmask = 7,
	416	.base.cra_module = THIS_MODULE,
	417	.min_keysize = AES_MIN_KEY_SIZE,
	418	.max_keysize = AES_MAX_KEY_SIZE,
	419	.ivsize = AES_BLOCK_SIZE,
	420	.setkey = aes_set_key_skcipher,
	421	.encrypt = ctr_crypt,
	422	.decrypt = ctr_crypt,
	423	.chunksize = AES_BLOCK_SIZE,
	424	}
	425	};
9bf4852d DM	426
	427	static bool __init sparc64_has_aes_opcode(void)
	428	{
	429	unsigned long cfr;
	430
	431	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
	432	return false;
	433
	434	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	435	if (!(cfr & CFR_AES))
	436	return false;
	437
	438	return true;
	439	}
	440
	441	static int __init aes_sparc64_mod_init(void)
	442	{
64db5e74 EB	443	int err;
	444
	445	if (!sparc64_has_aes_opcode()) {
	446	pr_info("sparc64 aes opcodes not available.\n");
	447	return -ENODEV;
9bf4852d	448	}
64db5e74 EB	449	pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
	450	err = crypto_register_alg(&cipher_alg);
	451	if (err)
	452	return err;
	453	err = crypto_register_skciphers(skcipher_algs,
	454	ARRAY_SIZE(skcipher_algs));
	455	if (err)
	456	crypto_unregister_alg(&cipher_alg);
	457	return err;
9bf4852d DM	458	}
	459
	460	static void __exit aes_sparc64_mod_fini(void)
	461	{
64db5e74 EB	462	crypto_unregister_alg(&cipher_alg);
64db5e74 EB	463	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
9bf4852d DM	464	}
	465
	466	module_init(aes_sparc64_mod_init);
	467	module_exit(aes_sparc64_mod_fini);
	468
	469	MODULE_LICENSE("GPL");
b0126417	470	MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, sparc64 aes opcode accelerated");
9bf4852d	471
5d26a105	472	MODULE_ALIAS_CRYPTO("aes");
226f7cea DM	473
226f7cea DM	474	#include "crop_devid.c"