summaryrefslogtreecommitdiffstats
path: root/drivers/crypto/vmx/aes_cbc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/crypto/vmx/aes_cbc.c')
-rw-r--r--drivers/crypto/vmx/aes_cbc.c133
1 files changed, 0 insertions, 133 deletions
diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c
deleted file mode 100644
index ed0debc7ac..0000000000
--- a/drivers/crypto/vmx/aes_cbc.c
+++ /dev/null
@@ -1,133 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * AES CBC routines supporting VMX instructions on the Power 8
- *
- * Copyright (C) 2015 International Business Machines Inc.
- *
- * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
- */
-
-#include <asm/simd.h>
-#include <asm/switch_to.h>
-#include <crypto/aes.h>
-#include <crypto/internal/simd.h>
-#include <crypto/internal/skcipher.h>
-
-#include "aesp8-ppc.h"
-
-struct p8_aes_cbc_ctx {
- struct crypto_skcipher *fallback;
- struct aes_key enc_key;
- struct aes_key dec_key;
-};
-
-static int p8_aes_cbc_init(struct crypto_skcipher *tfm)
-{
- struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
- struct crypto_skcipher *fallback;
-
- fallback = crypto_alloc_skcipher("cbc(aes)", 0,
- CRYPTO_ALG_NEED_FALLBACK |
- CRYPTO_ALG_ASYNC);
- if (IS_ERR(fallback)) {
- pr_err("Failed to allocate cbc(aes) fallback: %ld\n",
- PTR_ERR(fallback));
- return PTR_ERR(fallback);
- }
-
- crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
- crypto_skcipher_reqsize(fallback));
- ctx->fallback = fallback;
- return 0;
-}
-
-static void p8_aes_cbc_exit(struct crypto_skcipher *tfm)
-{
- struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
-
- crypto_free_skcipher(ctx->fallback);
-}
-
-static int p8_aes_cbc_setkey(struct crypto_skcipher *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
- int ret;
-
- 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_skcipher_setkey(ctx->fallback, key, keylen);
-
- return ret ? -EINVAL : 0;
-}
-
-static int p8_aes_cbc_crypt(struct skcipher_request *req, int enc)
-{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- const struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
- struct skcipher_walk walk;
- unsigned int nbytes;
- int ret;
-
- if (!crypto_simd_usable()) {
- struct skcipher_request *subreq = skcipher_request_ctx(req);
-
- *subreq = *req;
- skcipher_request_set_tfm(subreq, ctx->fallback);
- return enc ? crypto_skcipher_encrypt(subreq) :
- crypto_skcipher_decrypt(subreq);
- }
-
- ret = skcipher_walk_virt(&walk, req, false);
- while ((nbytes = walk.nbytes) != 0) {
- preempt_disable();
- pagefault_disable();
- enable_kernel_vsx();
- aes_p8_cbc_encrypt(walk.src.virt.addr,
- walk.dst.virt.addr,
- round_down(nbytes, AES_BLOCK_SIZE),
- enc ? &ctx->enc_key : &ctx->dec_key,
- walk.iv, enc);
- disable_kernel_vsx();
- pagefault_enable();
- preempt_enable();
-
- ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
- }
- return ret;
-}
-
-static int p8_aes_cbc_encrypt(struct skcipher_request *req)
-{
- return p8_aes_cbc_crypt(req, 1);
-}
-
-static int p8_aes_cbc_decrypt(struct skcipher_request *req)
-{
- return p8_aes_cbc_crypt(req, 0);
-}
-
-struct skcipher_alg p8_aes_cbc_alg = {
- .base.cra_name = "cbc(aes)",
- .base.cra_driver_name = "p8_aes_cbc",
- .base.cra_module = THIS_MODULE,
- .base.cra_priority = 2000,
- .base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
- .base.cra_blocksize = AES_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct p8_aes_cbc_ctx),
- .setkey = p8_aes_cbc_setkey,
- .encrypt = p8_aes_cbc_encrypt,
- .decrypt = p8_aes_cbc_decrypt,
- .init = p8_aes_cbc_init,
- .exit = p8_aes_cbc_exit,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .ivsize = AES_BLOCK_SIZE,
-};