crypto: serpent-sse2 - split generic glue code to new helper module

Now that serpent-sse2 glue code has been made generic, it can be split to
separate module.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 351 deletions

diff --git a/arch/x86/crypto/serpent_sse2_glue.c b/arch/x86/crypto/serpent_sse2_glue.c
index 8c86239010ae..49a32eedf0c8 100644
--- a/arch/x86/crypto/serpent_sse2_glue.c
+++ b/arch/x86/crypto/serpent_sse2_glue.c
@@ -41,359 +41,9 @@
 #include <crypto/ctr.h>
 #include <crypto/lrw.h>
 #include <crypto/xts.h>
-#include <asm/i387.h>
 #include <asm/serpent-sse2.h>
 #include <asm/crypto/ablk_helper.h>
-#include <crypto/scatterwalk.h>
-#include <linux/workqueue.h>
-#include <linux/spinlock.h>
-
-typedef void (*common_glue_func_t)(void *ctx, u8 *dst, const u8 *src);
-typedef void (*common_glue_cbc_func_t)(void *ctx, u128 *dst, const u128 *src);
-typedef void (*common_glue_ctr_func_t)(void *ctx, u128 *dst, const u128 *src,
-				       u128 *iv);
-
-#define GLUE_FUNC_CAST(fn) ((common_glue_func_t)(fn))
-#define GLUE_CBC_FUNC_CAST(fn) ((common_glue_cbc_func_t)(fn))
-#define GLUE_CTR_FUNC_CAST(fn) ((common_glue_ctr_func_t)(fn))
-
-struct common_glue_func_entry {
-	unsigned int num_blocks; /* number of blocks that @fn will process */
-	union {
-		common_glue_func_t ecb;
-		common_glue_cbc_func_t cbc;
-		common_glue_ctr_func_t ctr;
-	} fn_u;
-};
-
-struct common_glue_ctx {
-	unsigned int num_funcs;
-	int fpu_blocks_limit; /* -1 means fpu not needed at all */
-
-	/*
-	 * First funcs entry must have largest num_blocks and last funcs entry
-	 * must have num_blocks == 1!
-	 */
-	struct common_glue_func_entry funcs[];
-};
-
-static inline bool glue_fpu_begin(unsigned int bsize, int fpu_blocks_limit,
-				  struct blkcipher_desc *desc,
-				  bool fpu_enabled, unsigned int nbytes)
-{
-	if (likely(fpu_blocks_limit < 0))
-		return false;
-
-	if (fpu_enabled)
-		return true;
-
-	/*
-	 * Vector-registers are only used when chunk to be processed is large
-	 * enough, so do not enable FPU until it is necessary.
-	 */
-	if (nbytes < bsize * (unsigned int)fpu_blocks_limit)
-		return false;
-
-	if (desc) {
-		/* prevent sleeping if FPU is in use */
-		desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
-	}
-
-	kernel_fpu_begin();
-	return true;
-}
-
-static inline void glue_fpu_end(bool fpu_enabled)
-{
-	if (fpu_enabled)
-		kernel_fpu_end();
-}
-
-static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
-				   struct blkcipher_desc *desc,
-				   struct blkcipher_walk *walk)
-{
-	void *ctx = crypto_blkcipher_ctx(desc->tfm);
-	const unsigned int bsize = 128 / 8;
-	unsigned int nbytes, i, func_bytes;
-	bool fpu_enabled = false;
-	int err;
-
-	err = blkcipher_walk_virt(desc, walk);
-
-	while ((nbytes = walk->nbytes)) {
-		u8 *wsrc = walk->src.virt.addr;
-		u8 *wdst = walk->dst.virt.addr;
-
-		fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
-					     desc, fpu_enabled, nbytes);
-
-		for (i = 0; i < gctx->num_funcs; i++) {
-			func_bytes = bsize * gctx->funcs[i].num_blocks;
-
-			/* Process multi-block batch */
-			if (nbytes >= func_bytes) {
-				do {
-					gctx->funcs[i].fn_u.ecb(ctx, wdst,
-								wsrc);
-
-					wsrc += func_bytes;
-					wdst += func_bytes;
-					nbytes -= func_bytes;
-				} while (nbytes >= func_bytes);
-
-				if (nbytes < bsize)
-					goto done;
-			}
-		}
-
-done:
-		err = blkcipher_walk_done(desc, walk, nbytes);
-	}
-
-	glue_fpu_end(fpu_enabled);
-	return err;
-}
-
-int glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
-			  struct blkcipher_desc *desc, struct scatterlist *dst,
-			  struct scatterlist *src, unsigned int nbytes)
-{
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return __glue_ecb_crypt_128bit(gctx, desc, &walk);
-}
-
-static unsigned int __glue_cbc_encrypt_128bit(const common_glue_func_t fn,
-					      struct blkcipher_desc *desc,
-					      struct blkcipher_walk *walk)
-{
-	void *ctx = crypto_blkcipher_ctx(desc->tfm);
-	const unsigned int bsize = 128 / 8;
-	unsigned int nbytes = walk->nbytes;
-	u128 *src = (u128 *)walk->src.virt.addr;
-	u128 *dst = (u128 *)walk->dst.virt.addr;
-	u128 *iv = (u128 *)walk->iv;
-
-	do {
-		u128_xor(dst, src, iv);
-		fn(ctx, (u8 *)dst, (u8 *)dst);
-		iv = dst;
-
-		src += 1;
-		dst += 1;
-		nbytes -= bsize;
-	} while (nbytes >= bsize);
-
-	u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
-	return nbytes;
-}
-
-int glue_cbc_encrypt_128bit(const common_glue_func_t fn,
-			    struct blkcipher_desc *desc,
-			    struct scatterlist *dst,
-			    struct scatterlist *src, unsigned int nbytes)
-{
-	struct blkcipher_walk walk;
-	int err;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
-
-	while ((nbytes = walk.nbytes)) {
-		nbytes = __glue_cbc_encrypt_128bit(fn, desc, &walk);
-		err = blkcipher_walk_done(desc, &walk, nbytes);
-	}
-
-	return err;
-}
-
-static unsigned int
-__glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
-			  struct blkcipher_desc *desc,
-			  struct blkcipher_walk *walk)
-{
-	void *ctx = crypto_blkcipher_ctx(desc->tfm);
-	const unsigned int bsize = 128 / 8;
-	unsigned int nbytes = walk->nbytes;
-	u128 *src = (u128 *)walk->src.virt.addr;
-	u128 *dst = (u128 *)walk->dst.virt.addr;
-	u128 last_iv;
-	unsigned int num_blocks, func_bytes;
-	unsigned int i;
-
-	/* Start of the last block. */
-	src += nbytes / bsize - 1;
-	dst += nbytes / bsize - 1;
-
-	last_iv = *src;
-
-	for (i = 0; i < gctx->num_funcs; i++) {
-		num_blocks = gctx->funcs[i].num_blocks;
-		func_bytes = bsize * num_blocks;
-
-		/* Process multi-block batch */
-		if (nbytes >= func_bytes) {
-			do {
-				nbytes -= func_bytes - bsize;
-				src -= num_blocks - 1;
-				dst -= num_blocks - 1;
-
-				gctx->funcs[i].fn_u.cbc(ctx, dst, src);
-
-				nbytes -= bsize;
-				if (nbytes < bsize)
-					goto done;
-
-				u128_xor(dst, dst, src - 1);
-				src -= 1;
-				dst -= 1;
-			} while (nbytes >= func_bytes);
-
-			if (nbytes < bsize)
-				goto done;
-		}
-	}
-
-done:
-	u128_xor(dst, dst, (u128 *)walk->iv);
-	*(u128 *)walk->iv = last_iv;
-
-	return nbytes;
-}
-
-int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
-			    struct blkcipher_desc *desc,
-			    struct scatterlist *dst,
-			    struct scatterlist *src, unsigned int nbytes)
-{
-	const unsigned int bsize = 128 / 8;
-	bool fpu_enabled = false;
-	struct blkcipher_walk walk;
-	int err;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
-
-	while ((nbytes = walk.nbytes)) {
-		fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
-					     desc, fpu_enabled, nbytes);
-		nbytes = __glue_cbc_decrypt_128bit(gctx, desc, &walk);
-		err = blkcipher_walk_done(desc, &walk, nbytes);
-	}
-
-	glue_fpu_end(fpu_enabled);
-	return err;
-}
-
-static inline void u128_to_be128(be128 *dst, const u128 *src)
-{
-	dst->a = cpu_to_be64(src->a);
-	dst->b = cpu_to_be64(src->b);
-}
-
-static inline void be128_to_u128(u128 *dst, const be128 *src)
-{
-	dst->a = be64_to_cpu(src->a);
-	dst->b = be64_to_cpu(src->b);
-}
-
-static inline void u128_inc(u128 *i)
-{
-	i->b++;
-	if (!i->b)
-		i->a++;
-}
-
-static void glue_ctr_crypt_final_128bit(const common_glue_ctr_func_t fn_ctr,
-					struct blkcipher_desc *desc,
-					struct blkcipher_walk *walk)
-{
-	void *ctx = crypto_blkcipher_ctx(desc->tfm);
-	u8 *src = (u8 *)walk->src.virt.addr;
-	u8 *dst = (u8 *)walk->dst.virt.addr;
-	unsigned int nbytes = walk->nbytes;
-	u128 ctrblk;
-	u128 tmp;
-
-	be128_to_u128(&ctrblk, (be128 *)walk->iv);
-
-	memcpy(&tmp, src, nbytes);
-	fn_ctr(ctx, &tmp, &tmp, &ctrblk);
-	memcpy(dst, &tmp, nbytes);
-
-	u128_to_be128((be128 *)walk->iv, &ctrblk);
-}
-
-static unsigned int __glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
-					    struct blkcipher_desc *desc,
-					    struct blkcipher_walk *walk)
-{
-	const unsigned int bsize = 128 / 8;
-	void *ctx = crypto_blkcipher_ctx(desc->tfm);
-	unsigned int nbytes = walk->nbytes;
-	u128 *src = (u128 *)walk->src.virt.addr;
-	u128 *dst = (u128 *)walk->dst.virt.addr;
-	u128 ctrblk;
-	unsigned int num_blocks, func_bytes;
-	unsigned int i;
-
-	be128_to_u128(&ctrblk, (be128 *)walk->iv);
-
-	/* Process multi-block batch */
-	for (i = 0; i < gctx->num_funcs; i++) {
-		num_blocks = gctx->funcs[i].num_blocks;
-		func_bytes = bsize * num_blocks;
-
-		if (nbytes >= func_bytes) {
-			do {
-				gctx->funcs[i].fn_u.ctr(ctx, dst, src, &ctrblk);
-
-				src += num_blocks;
-				dst += num_blocks;
-				nbytes -= func_bytes;
-			} while (nbytes >= func_bytes);
-
-			if (nbytes < bsize)
-				goto done;
-		}
-	}
-
-done:
-	u128_to_be128((be128 *)walk->iv, &ctrblk);
-	return nbytes;
-}
-
-int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
-			  struct blkcipher_desc *desc, struct scatterlist *dst,
-			  struct scatterlist *src, unsigned int nbytes)
-{
-	const unsigned int bsize = 128 / 8;
-	bool fpu_enabled = false;
-	struct blkcipher_walk walk;
-	int err;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt_block(desc, &walk, bsize);
-
-	while ((nbytes = walk.nbytes) >= bsize) {
-		fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
-					     desc, fpu_enabled, nbytes);
-		nbytes = __glue_ctr_crypt_128bit(gctx, desc, &walk);
-		err = blkcipher_walk_done(desc, &walk, nbytes);
-	}
-
-	glue_fpu_end(fpu_enabled);
-
-	if (walk.nbytes) {
-		glue_ctr_crypt_final_128bit(
-			gctx->funcs[gctx->num_funcs - 1].fn_u.ctr, desc, &walk);
-		err = blkcipher_walk_done(desc, &walk, 0);
-	}
-
-	return err;
-}
+#include <asm/crypto/glue_helper.h>
 
 static void serpent_decrypt_cbc_xway(void *ctx, u128 *dst, const u128 *src)
 {