cd7c3bfe54
The Geode AES crypto engine supports only 128 bit long key. This patch adds fallback for other key sizes which are required by the AES standard. Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc> Acked-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/* Copyright (C) 2003-2006, Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _GEODE_AES_H_
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#define _GEODE_AES_H_
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/* driver logic flags */
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#define AES_IV_LENGTH 16
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#define AES_KEY_LENGTH 16
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#define AES_MIN_BLOCK_SIZE 16
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#define AES_MODE_ECB 0
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#define AES_MODE_CBC 1
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#define AES_DIR_DECRYPT 0
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#define AES_DIR_ENCRYPT 1
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#define AES_FLAGS_HIDDENKEY (1 << 0)
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/* Register definitions */
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#define AES_CTRLA_REG 0x0000
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#define AES_CTRL_START 0x01
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#define AES_CTRL_DECRYPT 0x00
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#define AES_CTRL_ENCRYPT 0x02
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#define AES_CTRL_WRKEY 0x04
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#define AES_CTRL_DCA 0x08
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#define AES_CTRL_SCA 0x10
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#define AES_CTRL_CBC 0x20
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#define AES_INTR_REG 0x0008
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#define AES_INTRA_PENDING (1 << 16)
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#define AES_INTRB_PENDING (1 << 17)
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#define AES_INTR_PENDING (AES_INTRA_PENDING | AES_INTRB_PENDING)
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#define AES_INTR_MASK 0x07
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#define AES_SOURCEA_REG 0x0010
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#define AES_DSTA_REG 0x0014
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#define AES_LENA_REG 0x0018
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#define AES_WRITEKEY0_REG 0x0030
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#define AES_WRITEIV0_REG 0x0040
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/* A very large counter that is used to gracefully bail out of an
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* operation in case of trouble
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*/
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#define AES_OP_TIMEOUT 0x50000
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struct geode_aes_op {
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void *src;
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void *dst;
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u32 mode;
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u32 dir;
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u32 flags;
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int len;
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u8 key[AES_KEY_LENGTH];
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u8 iv[AES_IV_LENGTH];
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union {
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struct crypto_blkcipher *blk;
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struct crypto_cipher *cip;
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} fallback;
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u32 keylen;
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};
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#endif
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