arch/sparc/crypto/des_glue.c - linux/kernel/git/gregkh/driver-core - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /* Glue code for DES encryption optimized for sparc64 crypto opcodes.
  *
  * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
  */

 #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/internal/des.h>
 #include <crypto/internal/skcipher.h>

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

 #include "opcodes.h"

 struct des_sparc64_ctx {
 	u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
 	u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
 };

 struct des3_ede_sparc64_ctx {
 	u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
 	u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
 };

 static void encrypt_to_decrypt(u64 *d, const u64 *e)
 {
 	const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
 	int i;

 	for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
 		*d++ = *s--;
 }

 extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);

 static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
 		       unsigned int keylen)
 {
 	struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
 	int err;

 	/* Even though we have special instructions for key expansion,
 	 * we call des_verify_key() so that we don't have to write our own
 	 * weak key detection code.
 	 */
 	err = crypto_des_verify_key(tfm, key);
 	if (err)
 		return err;

 	des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
 	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);

 	return 0;
 }

 static int des_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
 				unsigned int keylen)
 {
 	return des_set_key(crypto_skcipher_tfm(tfm), key, keylen);
 }

 extern void des_sparc64_crypt(const u64 *key, const u64 *input,
 			      u64 *output);

 static void sparc_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u64 *K = ctx->encrypt_expkey;

 	des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
 }

 static void sparc_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u64 *K = ctx->decrypt_expkey;

 	des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
 }

 extern void des_sparc64_load_keys(const u64 *key);

 extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
 				  unsigned int len);

 static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct des_sparc64_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;

 	if (encrypt)
 		des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
 	else
 		des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
 	while ((nbytes = walk.nbytes) != 0) {
 		des_sparc64_ecb_crypt(walk.src.virt.addr, walk.dst.virt.addr,
 				      round_down(nbytes, DES_BLOCK_SIZE));
 		err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int ecb_encrypt(struct skcipher_request *req)
 {
 	return __ecb_crypt(req, true);
 }

 static int ecb_decrypt(struct skcipher_request *req)
 {
 	return __ecb_crypt(req, false);
 }

 extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
 				    unsigned int len, u64 *iv);

 extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
 				    unsigned int len, u64 *iv);

 static int __cbc_crypt(struct skcipher_request *req, bool encrypt)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct des_sparc64_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;

 	if (encrypt)
 		des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
 	else
 		des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
 	while ((nbytes = walk.nbytes) != 0) {
 		if (encrypt)
 			des_sparc64_cbc_encrypt(walk.src.virt.addr,
 						walk.dst.virt.addr,
 						round_down(nbytes,
 							   DES_BLOCK_SIZE),
 						walk.iv);
 		else
 			des_sparc64_cbc_decrypt(walk.src.virt.addr,
 						walk.dst.virt.addr,
 						round_down(nbytes,
 							   DES_BLOCK_SIZE),
 						walk.iv);
 		err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int cbc_encrypt(struct skcipher_request *req)
 {
 	return __cbc_crypt(req, true);
 }

 static int cbc_decrypt(struct skcipher_request *req)
 {
 	return __cbc_crypt(req, false);
 }

 static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
 			    unsigned int keylen)
 {
 	struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
 	u64 k1[DES_EXPKEY_WORDS / 2];
 	u64 k2[DES_EXPKEY_WORDS / 2];
 	u64 k3[DES_EXPKEY_WORDS / 2];
 	int err;

 	err = crypto_des3_ede_verify_key(tfm, key);
 	if (err)
 		return err;

 	des_sparc64_key_expand((const u32 *)key, k1);
 	key += DES_KEY_SIZE;
 	des_sparc64_key_expand((const u32 *)key, k2);
 	key += DES_KEY_SIZE;
 	des_sparc64_key_expand((const u32 *)key, k3);

 	memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
 	encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
 	memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
 	       &k3[0], sizeof(k3));

 	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
 	memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
 	       &k2[0], sizeof(k2));
 	encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
 			   &k1[0]);

 	return 0;
 }

 static int des3_ede_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
 				     unsigned int keylen)
 {
 	return des3_ede_set_key(crypto_skcipher_tfm(tfm), key, keylen);
 }

 extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
 				   u64 *output);

 static void sparc_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u64 *K = ctx->encrypt_expkey;

 	des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
 }

 static void sparc_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u64 *K = ctx->decrypt_expkey;

 	des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
 }

 extern void des3_ede_sparc64_load_keys(const u64 *key);

 extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
 				       u64 *output, unsigned int len);

 static int __ecb3_crypt(struct skcipher_request *req, bool encrypt)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	const u64 *K;
 	unsigned int nbytes;
 	int err;

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

 	if (encrypt)
 		K = &ctx->encrypt_expkey[0];
 	else
 		K = &ctx->decrypt_expkey[0];
 	des3_ede_sparc64_load_keys(K);
 	while ((nbytes = walk.nbytes) != 0) {
 		des3_ede_sparc64_ecb_crypt(K, walk.src.virt.addr,
 					   walk.dst.virt.addr,
 					   round_down(nbytes, DES_BLOCK_SIZE));
 		err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int ecb3_encrypt(struct skcipher_request *req)
 {
 	return __ecb3_crypt(req, true);
 }

 static int ecb3_decrypt(struct skcipher_request *req)
 {
 	return __ecb3_crypt(req, false);
 }

 extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
 					 u64 *output, unsigned int len,
 					 u64 *iv);

 extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
 					 u64 *output, unsigned int len,
 					 u64 *iv);

 static int __cbc3_crypt(struct skcipher_request *req, bool encrypt)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	const u64 *K;
 	unsigned int nbytes;
 	int err;

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

 	if (encrypt)
 		K = &ctx->encrypt_expkey[0];
 	else
 		K = &ctx->decrypt_expkey[0];
 	des3_ede_sparc64_load_keys(K);
 	while ((nbytes = walk.nbytes) != 0) {
 		if (encrypt)
 			des3_ede_sparc64_cbc_encrypt(K, walk.src.virt.addr,
 						     walk.dst.virt.addr,
 						     round_down(nbytes,
 								DES_BLOCK_SIZE),
 						     walk.iv);
 		else
 			des3_ede_sparc64_cbc_decrypt(K, walk.src.virt.addr,
 						     walk.dst.virt.addr,
 						     round_down(nbytes,
 								DES_BLOCK_SIZE),
 						     walk.iv);
 		err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int cbc3_encrypt(struct skcipher_request *req)
 {
 	return __cbc3_crypt(req, true);
 }

 static int cbc3_decrypt(struct skcipher_request *req)
 {
 	return __cbc3_crypt(req, false);
 }

 static struct crypto_alg cipher_algs[] = {
 	{
 		.cra_name		= "des",
 		.cra_driver_name	= "des-sparc64",
 		.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
 		.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
 		.cra_blocksize		= DES_BLOCK_SIZE,
 		.cra_ctxsize		= sizeof(struct des_sparc64_ctx),
 		.cra_alignmask		= 7,
 		.cra_module		= THIS_MODULE,
 		.cra_u	= {
 			.cipher	= {
 				.cia_min_keysize	= DES_KEY_SIZE,
 				.cia_max_keysize	= DES_KEY_SIZE,
 				.cia_setkey		= des_set_key,
 				.cia_encrypt		= sparc_des_encrypt,
 				.cia_decrypt		= sparc_des_decrypt
 			}
 		}
 	}, {
 		.cra_name		= "des3_ede",
 		.cra_driver_name	= "des3_ede-sparc64",
 		.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
 		.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
 		.cra_blocksize		= DES3_EDE_BLOCK_SIZE,
 		.cra_ctxsize		= sizeof(struct des3_ede_sparc64_ctx),
 		.cra_alignmask		= 7,
 		.cra_module		= THIS_MODULE,
 		.cra_u	= {
 			.cipher	= {
 				.cia_min_keysize	= DES3_EDE_KEY_SIZE,
 				.cia_max_keysize	= DES3_EDE_KEY_SIZE,
 				.cia_setkey		= des3_ede_set_key,
 				.cia_encrypt		= sparc_des3_ede_encrypt,
 				.cia_decrypt		= sparc_des3_ede_decrypt
 			}
 		}
 	}
 };

 static struct skcipher_alg skcipher_algs[] = {
 	{
 		.base.cra_name		= "ecb(des)",
 		.base.cra_driver_name	= "ecb-des-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= DES_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct des_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= DES_KEY_SIZE,
 		.max_keysize		= DES_KEY_SIZE,
 		.setkey			= des_set_key_skcipher,
 		.encrypt		= ecb_encrypt,
 		.decrypt		= ecb_decrypt,
 	}, {
 		.base.cra_name		= "cbc(des)",
 		.base.cra_driver_name	= "cbc-des-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= DES_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct des_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= DES_KEY_SIZE,
 		.max_keysize		= DES_KEY_SIZE,
 		.ivsize			= DES_BLOCK_SIZE,
 		.setkey			= des_set_key_skcipher,
 		.encrypt		= cbc_encrypt,
 		.decrypt		= cbc_decrypt,
 	}, {
 		.base.cra_name		= "ecb(des3_ede)",
 		.base.cra_driver_name	= "ecb-des3_ede-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct des3_ede_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= DES3_EDE_KEY_SIZE,
 		.max_keysize		= DES3_EDE_KEY_SIZE,
 		.setkey			= des3_ede_set_key_skcipher,
 		.encrypt		= ecb3_encrypt,
 		.decrypt		= ecb3_decrypt,
 	}, {
 		.base.cra_name		= "cbc(des3_ede)",
 		.base.cra_driver_name	= "cbc-des3_ede-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct des3_ede_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= DES3_EDE_KEY_SIZE,
 		.max_keysize		= DES3_EDE_KEY_SIZE,
 		.ivsize			= DES3_EDE_BLOCK_SIZE,
 		.setkey			= des3_ede_set_key_skcipher,
 		.encrypt		= cbc3_encrypt,
 		.decrypt		= cbc3_decrypt,
 	}
 };

 static bool __init sparc64_has_des_opcode(void)
 {
 	unsigned long cfr;

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

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

 	return true;
 }

 static int __init des_sparc64_mod_init(void)
 {
 	int err;

 	if (!sparc64_has_des_opcode()) {
 		pr_info("sparc64 des opcodes not available.\n");
 		return -ENODEV;
 	}
 	pr_info("Using sparc64 des opcodes optimized DES implementation\n");
 	err = crypto_register_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
 	if (err)
 		return err;
 	err = crypto_register_skciphers(skcipher_algs,
 					ARRAY_SIZE(skcipher_algs));
 	if (err)
 		crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
 	return err;
 }

 static void __exit des_sparc64_mod_fini(void)
 {
 	crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
 	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
 }

 module_init(des_sparc64_mod_init);
 module_exit(des_sparc64_mod_fini);

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");

 MODULE_ALIAS_CRYPTO("des");
 MODULE_ALIAS_CRYPTO("des3_ede");

 #include "crop_devid.c"
	// SPDX-License-Identifier: GPL-2.0-only
	/* Glue code for DES encryption optimized for sparc64 crypto opcodes.
	*
	* Copyright (C) 2012 David S. Miller <davem@davemloft.net>
	*/

	#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/internal/des.h>
	#include <crypto/internal/skcipher.h>

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

	#include "opcodes.h"

	struct des_sparc64_ctx {
	u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
	u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
	};

	struct des3_ede_sparc64_ctx {
	u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
	u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
	};

	static void encrypt_to_decrypt(u64 d, const u64 e)
	{
	const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
	int i;

	for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
	d++ = s--;
	}

	extern void des_sparc64_key_expand(const u32 input_key, u64 key);

	static int des_set_key(struct crypto_tfm tfm, const u8 key,
	unsigned int keylen)
	{
	struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
	int err;

	/* Even though we have special instructions for key expansion,
	* we call des_verify_key() so that we don't have to write our own
	* weak key detection code.
	*/
	err = crypto_des_verify_key(tfm, key);
	if (err)
	return err;

	des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);

	return 0;
	}

	static int des_set_key_skcipher(struct crypto_skcipher tfm, const u8 key,
	unsigned int keylen)
	{
	return des_set_key(crypto_skcipher_tfm(tfm), key, keylen);
	}

	extern void des_sparc64_crypt(const u64 key, const u64 input,
	u64 *output);

	static void sparc_des_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
	const u64 *K = ctx->encrypt_expkey;

	des_sparc64_crypt(K, (const u64 ) src, (u64 ) dst);
	}

	static void sparc_des_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
	const u64 *K = ctx->decrypt_expkey;

	des_sparc64_crypt(K, (const u64 ) src, (u64 ) dst);
	}

	extern void des_sparc64_load_keys(const u64 *key);

	extern void des_sparc64_ecb_crypt(const u64 input, u64 output,
	unsigned int len);

	static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct des_sparc64_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;

	if (encrypt)
	des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
	else
	des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
	while ((nbytes = walk.nbytes) != 0) {
	des_sparc64_ecb_crypt(walk.src.virt.addr, walk.dst.virt.addr,
	round_down(nbytes, DES_BLOCK_SIZE));
	err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int ecb_encrypt(struct skcipher_request *req)
	{
	return __ecb_crypt(req, true);
	}

	static int ecb_decrypt(struct skcipher_request *req)
	{
	return __ecb_crypt(req, false);
	}

	extern void des_sparc64_cbc_encrypt(const u64 input, u64 output,
	unsigned int len, u64 *iv);

	extern void des_sparc64_cbc_decrypt(const u64 input, u64 output,
	unsigned int len, u64 *iv);

	static int __cbc_crypt(struct skcipher_request *req, bool encrypt)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct des_sparc64_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;

	if (encrypt)
	des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
	else
	des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
	while ((nbytes = walk.nbytes) != 0) {
	if (encrypt)
	des_sparc64_cbc_encrypt(walk.src.virt.addr,
	walk.dst.virt.addr,
	round_down(nbytes,
	DES_BLOCK_SIZE),
	walk.iv);
	else
	des_sparc64_cbc_decrypt(walk.src.virt.addr,
	walk.dst.virt.addr,
	round_down(nbytes,
	DES_BLOCK_SIZE),
	walk.iv);
	err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int cbc_encrypt(struct skcipher_request *req)
	{
	return __cbc_crypt(req, true);
	}

	static int cbc_decrypt(struct skcipher_request *req)
	{
	return __cbc_crypt(req, false);
	}

	static int des3_ede_set_key(struct crypto_tfm tfm, const u8 key,
	unsigned int keylen)
	{
	struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
	u64 k1[DES_EXPKEY_WORDS / 2];
	u64 k2[DES_EXPKEY_WORDS / 2];
	u64 k3[DES_EXPKEY_WORDS / 2];
	int err;

	err = crypto_des3_ede_verify_key(tfm, key);
	if (err)
	return err;

	des_sparc64_key_expand((const u32 *)key, k1);
	key += DES_KEY_SIZE;
	des_sparc64_key_expand((const u32 *)key, k2);
	key += DES_KEY_SIZE;
	des_sparc64_key_expand((const u32 *)key, k3);

	memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
	encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
	memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
	&k3[0], sizeof(k3));

	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
	memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
	&k2[0], sizeof(k2));
	encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
	&k1[0]);

	return 0;
	}

	static int des3_ede_set_key_skcipher(struct crypto_skcipher tfm, const u8 key,
	unsigned int keylen)
	{
	return des3_ede_set_key(crypto_skcipher_tfm(tfm), key, keylen);
	}

	extern void des3_ede_sparc64_crypt(const u64 key, const u64 input,
	u64 *output);

	static void sparc_des3_ede_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
	const u64 *K = ctx->encrypt_expkey;

	des3_ede_sparc64_crypt(K, (const u64 ) src, (u64 ) dst);
	}

	static void sparc_des3_ede_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
	const u64 *K = ctx->decrypt_expkey;

	des3_ede_sparc64_crypt(K, (const u64 ) src, (u64 ) dst);
	}

	extern void des3_ede_sparc64_load_keys(const u64 *key);

	extern void des3_ede_sparc64_ecb_crypt(const u64 expkey, const u64 input,
	u64 *output, unsigned int len);

	static int __ecb3_crypt(struct skcipher_request *req, bool encrypt)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	const u64 *K;
	unsigned int nbytes;
	int err;

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

	if (encrypt)
	K = &ctx->encrypt_expkey[0];
	else
	K = &ctx->decrypt_expkey[0];
	des3_ede_sparc64_load_keys(K);
	while ((nbytes = walk.nbytes) != 0) {
	des3_ede_sparc64_ecb_crypt(K, walk.src.virt.addr,
	walk.dst.virt.addr,
	round_down(nbytes, DES_BLOCK_SIZE));
	err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int ecb3_encrypt(struct skcipher_request *req)
	{
	return __ecb3_crypt(req, true);
	}

	static int ecb3_decrypt(struct skcipher_request *req)
	{
	return __ecb3_crypt(req, false);
	}

	extern void des3_ede_sparc64_cbc_encrypt(const u64 expkey, const u64 input,
	u64 *output, unsigned int len,
	u64 *iv);

	extern void des3_ede_sparc64_cbc_decrypt(const u64 expkey, const u64 input,
	u64 *output, unsigned int len,
	u64 *iv);

	static int __cbc3_crypt(struct skcipher_request *req, bool encrypt)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	const u64 *K;
	unsigned int nbytes;
	int err;

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

	if (encrypt)
	K = &ctx->encrypt_expkey[0];
	else
	K = &ctx->decrypt_expkey[0];
	des3_ede_sparc64_load_keys(K);
	while ((nbytes = walk.nbytes) != 0) {
	if (encrypt)
	des3_ede_sparc64_cbc_encrypt(K, walk.src.virt.addr,
	walk.dst.virt.addr,
	round_down(nbytes,
	DES_BLOCK_SIZE),
	walk.iv);
	else
	des3_ede_sparc64_cbc_decrypt(K, walk.src.virt.addr,
	walk.dst.virt.addr,
	round_down(nbytes,
	DES_BLOCK_SIZE),
	walk.iv);
	err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int cbc3_encrypt(struct skcipher_request *req)
	{
	return __cbc3_crypt(req, true);
	}

	static int cbc3_decrypt(struct skcipher_request *req)
	{
	return __cbc3_crypt(req, false);
	}

	static struct crypto_alg cipher_algs[] = {
	{
	.cra_name = "des",
	.cra_driver_name = "des-sparc64",
	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct des_sparc64_ctx),
	.cra_alignmask = 7,
	.cra_module = THIS_MODULE,
	.cra_u = {
	.cipher = {
	.cia_min_keysize = DES_KEY_SIZE,
	.cia_max_keysize = DES_KEY_SIZE,
	.cia_setkey = des_set_key,
	.cia_encrypt = sparc_des_encrypt,
	.cia_decrypt = sparc_des_decrypt
	}
	}
	}, {
	.cra_name = "des3_ede",
	.cra_driver_name = "des3_ede-sparc64",
	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize = DES3_EDE_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
	.cra_alignmask = 7,
	.cra_module = THIS_MODULE,
	.cra_u = {
	.cipher = {
	.cia_min_keysize = DES3_EDE_KEY_SIZE,
	.cia_max_keysize = DES3_EDE_KEY_SIZE,
	.cia_setkey = des3_ede_set_key,
	.cia_encrypt = sparc_des3_ede_encrypt,
	.cia_decrypt = sparc_des3_ede_decrypt
	}
	}
	}
	};

	static struct skcipher_alg skcipher_algs[] = {
	{
	.base.cra_name = "ecb(des)",
	.base.cra_driver_name = "ecb-des-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = DES_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = DES_KEY_SIZE,
	.max_keysize = DES_KEY_SIZE,
	.setkey = des_set_key_skcipher,
	.encrypt = ecb_encrypt,
	.decrypt = ecb_decrypt,
	}, {
	.base.cra_name = "cbc(des)",
	.base.cra_driver_name = "cbc-des-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = DES_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = DES_KEY_SIZE,
	.max_keysize = DES_KEY_SIZE,
	.ivsize = DES_BLOCK_SIZE,
	.setkey = des_set_key_skcipher,
	.encrypt = cbc_encrypt,
	.decrypt = cbc_decrypt,
	}, {
	.base.cra_name = "ecb(des3_ede)",
	.base.cra_driver_name = "ecb-des3_ede-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = DES3_EDE_KEY_SIZE,
	.max_keysize = DES3_EDE_KEY_SIZE,
	.setkey = des3_ede_set_key_skcipher,
	.encrypt = ecb3_encrypt,
	.decrypt = ecb3_decrypt,
	}, {
	.base.cra_name = "cbc(des3_ede)",
	.base.cra_driver_name = "cbc-des3_ede-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = DES3_EDE_KEY_SIZE,
	.max_keysize = DES3_EDE_KEY_SIZE,
	.ivsize = DES3_EDE_BLOCK_SIZE,
	.setkey = des3_ede_set_key_skcipher,
	.encrypt = cbc3_encrypt,
	.decrypt = cbc3_decrypt,
	}
	};

	static bool __init sparc64_has_des_opcode(void)
	{
	unsigned long cfr;

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

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

	return true;
	}

	static int __init des_sparc64_mod_init(void)
	{
	int err;

	if (!sparc64_has_des_opcode()) {
	pr_info("sparc64 des opcodes not available.\n");
	return -ENODEV;
	}
	pr_info("Using sparc64 des opcodes optimized DES implementation\n");
	err = crypto_register_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
	if (err)
	return err;
	err = crypto_register_skciphers(skcipher_algs,
	ARRAY_SIZE(skcipher_algs));
	if (err)
	crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
	return err;
	}

	static void __exit des_sparc64_mod_fini(void)
	{
	crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
	}

	module_init(des_sparc64_mod_init);
	module_exit(des_sparc64_mod_fini);

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");

	MODULE_ALIAS_CRYPTO("des");
	MODULE_ALIAS_CRYPTO("des3_ede");

	#include "crop_devid.c"