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536 lines
15 KiB
536 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Crypto acceleration support for Rockchip RK3288 |
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* |
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* Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd |
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* |
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* Author: Zain Wang <[email protected]> |
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* |
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* Some ideas are from marvell-cesa.c and s5p-sss.c driver. |
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*/ |
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#include <linux/device.h> |
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#include "rk3288_crypto.h" |
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#define RK_CRYPTO_DEC BIT(0) |
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static void rk_crypto_complete(struct crypto_async_request *base, int err) |
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{ |
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if (base->complete) |
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base->complete(base, err); |
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} |
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static int rk_handle_req(struct rk_crypto_info *dev, |
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struct skcipher_request *req) |
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{ |
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if (!IS_ALIGNED(req->cryptlen, dev->align_size)) |
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return -EINVAL; |
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else |
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return dev->enqueue(dev, &req->base); |
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} |
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static int rk_aes_setkey(struct crypto_skcipher *cipher, |
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const u8 *key, unsigned int keylen) |
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{ |
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struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher); |
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struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm); |
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if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && |
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keylen != AES_KEYSIZE_256) |
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return -EINVAL; |
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ctx->keylen = keylen; |
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memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, key, keylen); |
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return 0; |
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} |
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static int rk_des_setkey(struct crypto_skcipher *cipher, |
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const u8 *key, unsigned int keylen) |
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{ |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(cipher); |
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int err; |
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err = verify_skcipher_des_key(cipher, key); |
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if (err) |
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return err; |
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ctx->keylen = keylen; |
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memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); |
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return 0; |
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} |
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static int rk_tdes_setkey(struct crypto_skcipher *cipher, |
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const u8 *key, unsigned int keylen) |
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{ |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(cipher); |
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int err; |
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err = verify_skcipher_des3_key(cipher, key); |
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if (err) |
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return err; |
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ctx->keylen = keylen; |
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memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); |
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return 0; |
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} |
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static int rk_aes_ecb_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_AES_ECB_MODE; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_aes_ecb_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_aes_cbc_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_AES_CBC_MODE; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_aes_cbc_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des_ecb_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = 0; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des_ecb_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des_cbc_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des_cbc_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des3_ede_ecb_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_SELECT; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des3_ede_ecb_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des3_ede_cbc_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC; |
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return rk_handle_req(dev, req); |
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} |
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static int rk_des3_ede_cbc_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct rk_crypto_info *dev = ctx->dev; |
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC | |
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RK_CRYPTO_DEC; |
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return rk_handle_req(dev, req); |
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} |
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static void rk_ablk_hw_init(struct rk_crypto_info *dev) |
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{ |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); |
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struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(cipher); |
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u32 ivsize, block, conf_reg = 0; |
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block = crypto_tfm_alg_blocksize(tfm); |
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ivsize = crypto_skcipher_ivsize(cipher); |
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if (block == DES_BLOCK_SIZE) { |
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ctx->mode |= RK_CRYPTO_TDES_FIFO_MODE | |
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RK_CRYPTO_TDES_BYTESWAP_KEY | |
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RK_CRYPTO_TDES_BYTESWAP_IV; |
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CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, ctx->mode); |
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memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, req->iv, ivsize); |
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conf_reg = RK_CRYPTO_DESSEL; |
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} else { |
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ctx->mode |= RK_CRYPTO_AES_FIFO_MODE | |
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RK_CRYPTO_AES_KEY_CHANGE | |
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RK_CRYPTO_AES_BYTESWAP_KEY | |
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RK_CRYPTO_AES_BYTESWAP_IV; |
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if (ctx->keylen == AES_KEYSIZE_192) |
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ctx->mode |= RK_CRYPTO_AES_192BIT_key; |
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else if (ctx->keylen == AES_KEYSIZE_256) |
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ctx->mode |= RK_CRYPTO_AES_256BIT_key; |
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CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, ctx->mode); |
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memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, req->iv, ivsize); |
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} |
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conf_reg |= RK_CRYPTO_BYTESWAP_BTFIFO | |
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RK_CRYPTO_BYTESWAP_BRFIFO; |
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CRYPTO_WRITE(dev, RK_CRYPTO_CONF, conf_reg); |
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CRYPTO_WRITE(dev, RK_CRYPTO_INTENA, |
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RK_CRYPTO_BCDMA_ERR_ENA | RK_CRYPTO_BCDMA_DONE_ENA); |
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} |
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static void crypto_dma_start(struct rk_crypto_info *dev) |
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{ |
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CRYPTO_WRITE(dev, RK_CRYPTO_BRDMAS, dev->addr_in); |
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CRYPTO_WRITE(dev, RK_CRYPTO_BRDMAL, dev->count / 4); |
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CRYPTO_WRITE(dev, RK_CRYPTO_BTDMAS, dev->addr_out); |
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CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, RK_CRYPTO_BLOCK_START | |
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_SBF(RK_CRYPTO_BLOCK_START, 16)); |
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} |
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static int rk_set_data_start(struct rk_crypto_info *dev) |
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{ |
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int err; |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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u32 ivsize = crypto_skcipher_ivsize(tfm); |
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u8 *src_last_blk = page_address(sg_page(dev->sg_src)) + |
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dev->sg_src->offset + dev->sg_src->length - ivsize; |
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/* Store the iv that need to be updated in chain mode. |
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* And update the IV buffer to contain the next IV for decryption mode. |
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*/ |
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if (ctx->mode & RK_CRYPTO_DEC) { |
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memcpy(ctx->iv, src_last_blk, ivsize); |
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sg_pcopy_to_buffer(dev->first, dev->src_nents, req->iv, |
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ivsize, dev->total - ivsize); |
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} |
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err = dev->load_data(dev, dev->sg_src, dev->sg_dst); |
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if (!err) |
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crypto_dma_start(dev); |
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return err; |
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} |
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static int rk_ablk_start(struct rk_crypto_info *dev) |
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{ |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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unsigned long flags; |
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int err = 0; |
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dev->left_bytes = req->cryptlen; |
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dev->total = req->cryptlen; |
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dev->sg_src = req->src; |
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dev->first = req->src; |
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dev->src_nents = sg_nents(req->src); |
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dev->sg_dst = req->dst; |
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dev->dst_nents = sg_nents(req->dst); |
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dev->aligned = 1; |
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spin_lock_irqsave(&dev->lock, flags); |
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rk_ablk_hw_init(dev); |
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err = rk_set_data_start(dev); |
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spin_unlock_irqrestore(&dev->lock, flags); |
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return err; |
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} |
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static void rk_iv_copyback(struct rk_crypto_info *dev) |
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{ |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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u32 ivsize = crypto_skcipher_ivsize(tfm); |
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/* Update the IV buffer to contain the next IV for encryption mode. */ |
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if (!(ctx->mode & RK_CRYPTO_DEC)) { |
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if (dev->aligned) { |
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memcpy(req->iv, sg_virt(dev->sg_dst) + |
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dev->sg_dst->length - ivsize, ivsize); |
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} else { |
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memcpy(req->iv, dev->addr_vir + |
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dev->count - ivsize, ivsize); |
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} |
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} |
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} |
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static void rk_update_iv(struct rk_crypto_info *dev) |
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{ |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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u32 ivsize = crypto_skcipher_ivsize(tfm); |
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u8 *new_iv = NULL; |
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if (ctx->mode & RK_CRYPTO_DEC) { |
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new_iv = ctx->iv; |
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} else { |
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new_iv = page_address(sg_page(dev->sg_dst)) + |
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dev->sg_dst->offset + dev->sg_dst->length - ivsize; |
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} |
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if (ivsize == DES_BLOCK_SIZE) |
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memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, new_iv, ivsize); |
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else if (ivsize == AES_BLOCK_SIZE) |
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memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, new_iv, ivsize); |
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} |
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/* return: |
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* true some err was occurred |
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* fault no err, continue |
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*/ |
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static int rk_ablk_rx(struct rk_crypto_info *dev) |
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{ |
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int err = 0; |
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struct skcipher_request *req = |
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skcipher_request_cast(dev->async_req); |
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dev->unload_data(dev); |
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if (!dev->aligned) { |
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if (!sg_pcopy_from_buffer(req->dst, dev->dst_nents, |
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dev->addr_vir, dev->count, |
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dev->total - dev->left_bytes - |
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dev->count)) { |
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err = -EINVAL; |
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goto out_rx; |
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} |
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} |
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if (dev->left_bytes) { |
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rk_update_iv(dev); |
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if (dev->aligned) { |
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if (sg_is_last(dev->sg_src)) { |
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dev_err(dev->dev, "[%s:%d] Lack of data\n", |
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__func__, __LINE__); |
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err = -ENOMEM; |
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goto out_rx; |
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} |
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dev->sg_src = sg_next(dev->sg_src); |
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dev->sg_dst = sg_next(dev->sg_dst); |
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} |
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err = rk_set_data_start(dev); |
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} else { |
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rk_iv_copyback(dev); |
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/* here show the calculation is over without any err */ |
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dev->complete(dev->async_req, 0); |
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tasklet_schedule(&dev->queue_task); |
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} |
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out_rx: |
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return err; |
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} |
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static int rk_ablk_init_tfm(struct crypto_skcipher *tfm) |
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{ |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct skcipher_alg *alg = crypto_skcipher_alg(tfm); |
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struct rk_crypto_tmp *algt; |
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algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher); |
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ctx->dev = algt->dev; |
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ctx->dev->align_size = crypto_tfm_alg_alignmask(crypto_skcipher_tfm(tfm)) + 1; |
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ctx->dev->start = rk_ablk_start; |
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ctx->dev->update = rk_ablk_rx; |
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ctx->dev->complete = rk_crypto_complete; |
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ctx->dev->addr_vir = (char *)__get_free_page(GFP_KERNEL); |
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return ctx->dev->addr_vir ? ctx->dev->enable_clk(ctx->dev) : -ENOMEM; |
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} |
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static void rk_ablk_exit_tfm(struct crypto_skcipher *tfm) |
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{ |
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struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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free_page((unsigned long)ctx->dev->addr_vir); |
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ctx->dev->disable_clk(ctx->dev); |
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} |
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struct rk_crypto_tmp rk_ecb_aes_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "ecb(aes)", |
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.base.cra_driver_name = "ecb-aes-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = AES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x0f, |
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.base.cra_module = THIS_MODULE, |
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = AES_MIN_KEY_SIZE, |
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.max_keysize = AES_MAX_KEY_SIZE, |
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.setkey = rk_aes_setkey, |
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.encrypt = rk_aes_ecb_encrypt, |
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.decrypt = rk_aes_ecb_decrypt, |
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} |
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}; |
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struct rk_crypto_tmp rk_cbc_aes_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "cbc(aes)", |
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.base.cra_driver_name = "cbc-aes-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = AES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x0f, |
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.base.cra_module = THIS_MODULE, |
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = AES_MIN_KEY_SIZE, |
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.max_keysize = AES_MAX_KEY_SIZE, |
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.ivsize = AES_BLOCK_SIZE, |
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.setkey = rk_aes_setkey, |
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.encrypt = rk_aes_cbc_encrypt, |
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.decrypt = rk_aes_cbc_decrypt, |
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} |
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}; |
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struct rk_crypto_tmp rk_ecb_des_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "ecb(des)", |
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.base.cra_driver_name = "ecb-des-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = DES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x07, |
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.base.cra_module = THIS_MODULE, |
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = DES_KEY_SIZE, |
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.max_keysize = DES_KEY_SIZE, |
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.setkey = rk_des_setkey, |
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.encrypt = rk_des_ecb_encrypt, |
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.decrypt = rk_des_ecb_decrypt, |
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} |
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}; |
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struct rk_crypto_tmp rk_cbc_des_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "cbc(des)", |
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.base.cra_driver_name = "cbc-des-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = DES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x07, |
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.base.cra_module = THIS_MODULE, |
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = DES_KEY_SIZE, |
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.max_keysize = DES_KEY_SIZE, |
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.ivsize = DES_BLOCK_SIZE, |
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.setkey = rk_des_setkey, |
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.encrypt = rk_des_cbc_encrypt, |
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.decrypt = rk_des_cbc_decrypt, |
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} |
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}; |
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struct rk_crypto_tmp rk_ecb_des3_ede_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "ecb(des3_ede)", |
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.base.cra_driver_name = "ecb-des3-ede-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = DES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x07, |
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.base.cra_module = THIS_MODULE, |
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|
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = DES3_EDE_KEY_SIZE, |
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.max_keysize = DES3_EDE_KEY_SIZE, |
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.setkey = rk_tdes_setkey, |
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.encrypt = rk_des3_ede_ecb_encrypt, |
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.decrypt = rk_des3_ede_ecb_decrypt, |
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} |
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}; |
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|
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struct rk_crypto_tmp rk_cbc_des3_ede_alg = { |
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.type = ALG_TYPE_CIPHER, |
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.alg.skcipher = { |
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.base.cra_name = "cbc(des3_ede)", |
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.base.cra_driver_name = "cbc-des3-ede-rk", |
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.base.cra_priority = 300, |
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.base.cra_flags = CRYPTO_ALG_ASYNC, |
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.base.cra_blocksize = DES_BLOCK_SIZE, |
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.base.cra_ctxsize = sizeof(struct rk_cipher_ctx), |
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.base.cra_alignmask = 0x07, |
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.base.cra_module = THIS_MODULE, |
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|
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.init = rk_ablk_init_tfm, |
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.exit = rk_ablk_exit_tfm, |
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.min_keysize = DES3_EDE_KEY_SIZE, |
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.max_keysize = DES3_EDE_KEY_SIZE, |
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.ivsize = DES_BLOCK_SIZE, |
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.setkey = rk_tdes_setkey, |
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.encrypt = rk_des3_ede_cbc_encrypt, |
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.decrypt = rk_des3_ede_cbc_decrypt, |
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} |
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};
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