[CRYPTO] padlock: Get rid of padlock-generic.c

Merge padlock-generic.c into padlock-aes.c and compile
AES as a standalone module. We won't make a monolithic
padlock.ko with all supported algorithms, instead we'll
compile each driver into its own module.

Signed-off-by: Michal Ludvig <michal@logix.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -1,24 +1,30 @@
 menu "Hardware crypto devices"
 
 config CRYPTO_DEV_PADLOCK
-	tristate "Support for VIA PadLock ACE"
+	bool "Support for VIA PadLock ACE"
 	depends on X86_32
 	select CRYPTO_ALGAPI
+	default y
 	help
 	  Some VIA processors come with an integrated crypto engine
 	  (so called VIA PadLock ACE, Advanced Cryptography Engine)
-	  that provides instructions for very fast {en,de}cryption 
-	  with some algorithms.
+	  that provides instructions for very fast cryptographic
+	  operations with supported algorithms.
 
 	  The instructions are used only when the CPU supports them.
 	  Otherwise software encryption is used. If you are unsure,
 	  say Y.
 
 config CRYPTO_DEV_PADLOCK_AES
-	bool "Support for AES in VIA PadLock"
+	tristate "PadLock driver for AES algorithm"
 	depends on CRYPTO_DEV_PADLOCK
-	default y
+	default m
 	help
 	  Use VIA PadLock for AES algorithm.
 
+	  Available in VIA C3 and newer CPUs.
+
+	  If unsure say M. The compiled module will be
+	  called padlock-aes.ko
+
 endmenu

drivers/crypto/Makefile

@@ -1,7 +1 @@
-
-obj-$(CONFIG_CRYPTO_DEV_PADLOCK) += padlock.o
-
-padlock-objs-$(CONFIG_CRYPTO_DEV_PADLOCK_AES) += padlock-aes.o
-
-padlock-objs := padlock-generic.o $(padlock-objs-y)
-
+obj-$(CONFIG_CRYPTO_DEV_PADLOCK_AES) += padlock-aes.o

drivers/crypto/padlock-aes.c

@@ -495,15 +495,41 @@ static struct crypto_alg aes_alg = {
 	}
 };
 
-int __init padlock_init_aes(void)
+static int __init padlock_init(void)
 {
-	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
+	int ret;
+
+	if (!cpu_has_xcrypt) {
+		printk(KERN_ERR PFX "VIA PadLock not detected.\n");
+		return -ENODEV;
+	}
+
+	if (!cpu_has_xcrypt_enabled) {
+		printk(KERN_ERR PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
+		return -ENODEV;
+	}
 
 	gen_tabs();
-	return crypto_register_alg(&aes_alg);
+	if ((ret = crypto_register_alg(&aes_alg))) {
+		printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n");
+		return ret;
+	}
+
+	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
+
+	return ret;
 }
 
-void __exit padlock_fini_aes(void)
+static void __exit padlock_fini(void)
 {
 	crypto_unregister_alg(&aes_alg);
 }
+
+module_init(padlock_init);
+module_exit(padlock_fini);
+
+MODULE_DESCRIPTION("VIA PadLock AES algorithm support");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Ludvig");
+
+MODULE_ALIAS("aes-padlock");