diff options
Diffstat (limited to 'drivers/crypto/vmx/aes.c')
| -rw-r--r-- | drivers/crypto/vmx/aes.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/drivers/crypto/vmx/aes.c b/drivers/crypto/vmx/aes.c deleted file mode 100644 index 96072b9b55c4..000000000000 --- a/drivers/crypto/vmx/aes.c +++ /dev/null @@ -1,145 +0,0 @@ -/** - * AES routines supporting VMX instructions on the Power 8 - * - * Copyright (C) 2015 International Business Machines Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 only. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com> - */ - -#include <linux/types.h> -#include <linux/err.h> -#include <linux/crypto.h> -#include <linux/delay.h> -#include <linux/hardirq.h> -#include <asm/switch_to.h> -#include <crypto/aes.h> - -#include "aesp8-ppc.h" - -struct p8_aes_ctx { - struct crypto_cipher *fallback; - struct aes_key enc_key; - struct aes_key dec_key; -}; - -static int p8_aes_init(struct crypto_tfm *tfm) -{ - const char *alg = crypto_tfm_alg_name(tfm); - struct crypto_cipher *fallback; - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - fallback = crypto_alloc_cipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK); - if (IS_ERR(fallback)) { - printk(KERN_ERR - "Failed to allocate transformation for '%s': %ld\n", - alg, PTR_ERR(fallback)); - return PTR_ERR(fallback); - } - printk(KERN_INFO "Using '%s' as fallback implementation.\n", - crypto_tfm_alg_driver_name((struct crypto_tfm *) fallback)); - - crypto_cipher_set_flags(fallback, - crypto_cipher_get_flags((struct - crypto_cipher *) - tfm)); - ctx->fallback = fallback; - - return 0; -} - -static void p8_aes_exit(struct crypto_tfm *tfm) -{ - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (ctx->fallback) { - crypto_free_cipher(ctx->fallback); - ctx->fallback = NULL; - } -} - -static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key, - unsigned int keylen) -{ - int ret; - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key); - ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - ret += crypto_cipher_setkey(ctx->fallback, key, keylen); - return ret; -} - -static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) -{ - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (in_interrupt()) { - crypto_cipher_encrypt_one(ctx->fallback, dst, src); - } else { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_encrypt(src, dst, &ctx->enc_key); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - } -} - -static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) -{ - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (in_interrupt()) { - crypto_cipher_decrypt_one(ctx->fallback, dst, src); - } else { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_decrypt(src, dst, &ctx->dec_key); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - } -} - -struct crypto_alg p8_aes_alg = { - .cra_name = "aes", - .cra_driver_name = "p8_aes", - .cra_module = THIS_MODULE, - .cra_priority = 1000, - .cra_type = NULL, - .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_NEED_FALLBACK, - .cra_alignmask = 0, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct p8_aes_ctx), - .cra_init = p8_aes_init, - .cra_exit = p8_aes_exit, - .cra_cipher = { - .cia_min_keysize = AES_MIN_KEY_SIZE, - .cia_max_keysize = AES_MAX_KEY_SIZE, - .cia_setkey = p8_aes_setkey, - .cia_encrypt = p8_aes_encrypt, - .cia_decrypt = p8_aes_decrypt, - }, -}; |
