[PATCH] crypto: Add support for the Geode LX AES hardware

Add a driver to support the AES hardware on the Geode LX processor.
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -51,4 +51,17 @@ config CRYPTO_DEV_PADLOCK_SHA
 	  If unsure say M. The compiled module will be
 	  called padlock-sha.ko
 
+config CRYPTO_DEV_GEODE
+	tristate "Support for the Geode LX AES engine"
+	depends on CRYPTO && X86_32
+	select CRYPTO_ALGAPI
+	select CRYPTO_BLKCIPHER
+	default m
+	help
+	  Say 'Y' here to use the AMD Geode LX processor on-board AES
+	  engine for the CryptoAPI AES alogrithm.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called geode-aes.
+
 endmenu

drivers/crypto/Makefile

 obj-$(CONFIG_CRYPTO_DEV_PADLOCK) += padlock.o
 obj-$(CONFIG_CRYPTO_DEV_PADLOCK_AES) += padlock-aes.o
 obj-$(CONFIG_CRYPTO_DEV_PADLOCK_SHA) += padlock-sha.o
+obj-$(CONFIG_CRYPTO_DEV_GEODE) += geode-aes.o

drivers/crypto/geode-aes.h

+/* Copyright (C) 2003-2006, Advanced Micro Devices, 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _GEODE_AES_H_
+#define _GEODE_AES_H_
+
+#define AES_KEY_LENGTH 16
+#define AES_IV_LENGTH  16
+
+#define AES_MIN_BLOCK_SIZE 16
+
+#define AES_MODE_ECB 0
+#define AES_MODE_CBC 1
+
+#define AES_DIR_DECRYPT 0
+#define AES_DIR_ENCRYPT 1
+
+#define AES_FLAGS_USRKEY   (1 << 0)
+#define AES_FLAGS_COHERENT (1 << 1)
+
+struct geode_aes_op {
+
+	void *src;
+	void *dst;
+
+	u32 mode;
+	u32 dir;
+	u32 flags;
+	int len;
+
+	u8 key[AES_KEY_LENGTH];
+	u8 iv[AES_IV_LENGTH];
+};
+
+unsigned int geode_aes_crypt(struct geode_aes_op *);
+
+#endif