[CRYPTO] all: Pass tfm instead of ctx to algorithms

Up until now algorithms have been happy to get a context pointer since
they know everything that's in the tfm already (e.g., alignment, block
size).

However, once we have parameterised algorithms, such information will
be specific to each tfm.  So the algorithm API needs to be changed to
pass the tfm structure instead of the context pointer.

This patch is basically a text substitution.  The only tricky bit is
the assembly routines that need to get the context pointer offset
through asm-offsets.h.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

3 files changed, 19 insertions, 12 deletions

diff --git a/arch/x86_64/crypto/aes-x86_64-asm.S b/arch/x86_64/crypto/aes-x86_64-asm.S
index 483cbb23ab8d..f3ba643e144d 100644
--- a/arch/x86_64/crypto/aes-x86_64-asm.S
+++ b/arch/x86_64/crypto/aes-x86_64-asm.S
@@ -15,6 +15,10 @@
 
 .text
 
+#include <asm/asm-offsets.h>
+
+#define BASE crypto_tfm_ctx_offset
+
 #define R1	%rax
 #define R1E	%eax
 #define R1X	%ax
@@ -46,19 +50,19 @@
 #define R10	%r10
 #define R11	%r11
 
-#define prologue(FUNC,BASE,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \
+#define prologue(FUNC,KEY,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \
 	.global	FUNC;			\
 	.type	FUNC,@function;		\
 	.align	8;			\
 FUNC:	movq	r1,r2;			\
 	movq	r3,r4;			\
-	leaq	BASE+52(r8),r9;		\
+	leaq	BASE+KEY+52(r8),r9;	\
 	movq	r10,r11;		\
 	movl	(r7),r5 ## E;		\
 	movl	4(r7),r1 ## E;		\
 	movl	8(r7),r6 ## E;		\
 	movl	12(r7),r7 ## E;		\
-	movl	(r8),r10 ## E;		\
+	movl	BASE(r8),r10 ## E;	\
 	xorl	-48(r9),r5 ## E;	\
 	xorl	-44(r9),r1 ## E;	\
 	xorl	-40(r9),r6 ## E;	\
@@ -128,8 +132,8 @@ FUNC:	movq	r1,r2;			\
 	movl	r3 ## E,r1 ## E;	\
 	movl	r4 ## E,r2 ## E;
 
-#define entry(FUNC,BASE,B128,B192) \
-	prologue(FUNC,BASE,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11)
+#define entry(FUNC,KEY,B128,B192) \
+	prologue(FUNC,KEY,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11)
 
 #define return epilogue(R8,R2,R9,R7,R5,R6,R3,R4,R11)
 
@@ -147,7 +151,7 @@ FUNC:	movq	r1,r2;			\
 #define decrypt_final(TAB,OFFSET) \
 	round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4)
 
-/* void aes_encrypt(void *ctx, u8 *out, const u8 *in) */
+/* void aes_encrypt(stuct crypto_tfm *tfm, u8 *out, const u8 *in) */
 
 	entry(aes_encrypt,0,enc128,enc192)
 	encrypt_round(aes_ft_tab,-96)
@@ -166,7 +170,7 @@ enc128:	encrypt_round(aes_ft_tab,-32)
 	encrypt_final(aes_fl_tab,112)
 	return
 
-/* void aes_decrypt(void *ctx, u8 *out, const u8 *in) */
+/* void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) */
 
 	entry(aes_decrypt,240,dec128,dec192)
 	decrypt_round(aes_it_tab,-96)
diff --git a/arch/x86_64/crypto/aes.c b/arch/x86_64/crypto/aes.c
index 6f77e7700d32..d6f8e0463b5d 100644
--- a/arch/x86_64/crypto/aes.c
+++ b/arch/x86_64/crypto/aes.c
@@ -227,10 +227,10 @@ static void __init gen_tabs(void)
 	t ^= E_KEY[8 * i + 7]; E_KEY[8 * i + 15] = t;	\
 }
 
-static int aes_set_key(void *ctx_arg, const u8 *in_key, unsigned int key_len,
-		       u32 *flags)
+static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+		       unsigned int key_len, u32 *flags)
 {
-	struct aes_ctx *ctx = ctx_arg;
+	struct aes_ctx *ctx = crypto_tfm_ctx(tfm);
 	const __le32 *key = (const __le32 *)in_key;
 	u32 i, j, t, u, v, w;
 
@@ -283,8 +283,8 @@ static int aes_set_key(void *ctx_arg, const u8 *in_key, unsigned int key_len,
 	return 0;
 }
 
-extern void aes_encrypt(void *ctx_arg, u8 *out, const u8 *in);
-extern void aes_decrypt(void *ctx_arg, u8 *out, const u8 *in);
+extern void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in);
+extern void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in);
 
 static struct crypto_alg aes_alg = {
 	.cra_name		=	"aes",
diff --git a/arch/x86_64/kernel/asm-offsets.c b/arch/x86_64/kernel/asm-offsets.c
index 38834bbbae11..96687e2beb2c 100644
--- a/arch/x86_64/kernel/asm-offsets.c
+++ b/arch/x86_64/kernel/asm-offsets.c
@@ -4,6 +4,7 @@
  * and format the required data.
  */
 
+#include <linux/crypto.h>
 #include <linux/sched.h> 
 #include <linux/stddef.h>
 #include <linux/errno.h> 
@@ -68,5 +69,7 @@ int main(void)
 	DEFINE(pbe_next, offsetof(struct pbe, next));
 	BLANK();
 	DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
+	BLANK();
+	DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
 	return 0;
 }