crypto: x86/cast5 - drop dependency on glue helper
Replace the glue helper dependency with implementations of ECB and CBC
based on the new CPP macros, which avoid the need for indirect calls.
Acked-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/arch/x86/crypto/cast5_avx_glue.c b/arch/x86/crypto/cast5_avx_glue.c
index e0d1c79..3976a87 100644
--- a/arch/x86/crypto/cast5_avx_glue.c
+++ b/arch/x86/crypto/cast5_avx_glue.c
@@ -6,7 +6,6 @@
* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
*/
-#include <asm/crypto/glue_helper.h>
#include <crypto/algapi.h>
#include <crypto/cast5.h>
#include <crypto/internal/simd.h>
@@ -15,6 +14,8 @@
#include <linux/module.h>
#include <linux/types.h>
+#include "ecb_cbc_helpers.h"
+
#define CAST5_PARALLEL_BLOCKS 16
asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst,
@@ -30,186 +31,35 @@ static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
return cast5_setkey(&tfm->base, key, keylen);
}
-static inline bool cast5_fpu_begin(bool fpu_enabled, struct skcipher_walk *walk,
- unsigned int nbytes)
-{
- return glue_fpu_begin(CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS,
- walk, fpu_enabled, nbytes);
-}
-
-static inline void cast5_fpu_end(bool fpu_enabled)
-{
- return glue_fpu_end(fpu_enabled);
-}
-
-static int ecb_crypt(struct skcipher_request *req, bool enc)
-{
- bool fpu_enabled = false;
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
- struct skcipher_walk walk;
- const unsigned int bsize = CAST5_BLOCK_SIZE;
- unsigned int nbytes;
- void (*fn)(struct cast5_ctx *ctx, u8 *dst, const u8 *src);
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- u8 *wsrc = walk.src.virt.addr;
- u8 *wdst = walk.dst.virt.addr;
-
- fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
-
- /* Process multi-block batch */
- if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
- fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way;
- do {
- fn(ctx, wdst, wsrc);
-
- wsrc += bsize * CAST5_PARALLEL_BLOCKS;
- wdst += bsize * CAST5_PARALLEL_BLOCKS;
- nbytes -= bsize * CAST5_PARALLEL_BLOCKS;
- } while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);
-
- if (nbytes < bsize)
- goto done;
- }
-
- fn = (enc) ? __cast5_encrypt : __cast5_decrypt;
-
- /* Handle leftovers */
- do {
- fn(ctx, wdst, wsrc);
-
- wsrc += bsize;
- wdst += bsize;
- nbytes -= bsize;
- } while (nbytes >= bsize);
-
-done:
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- cast5_fpu_end(fpu_enabled);
- return err;
-}
-
static int ecb_encrypt(struct skcipher_request *req)
{
- return ecb_crypt(req, true);
+ ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
+ ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_enc_16way);
+ ECB_BLOCK(1, __cast5_encrypt);
+ ECB_WALK_END();
}
static int ecb_decrypt(struct skcipher_request *req)
{
- return ecb_crypt(req, false);
+ ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
+ ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_dec_16way);
+ ECB_BLOCK(1, __cast5_decrypt);
+ ECB_WALK_END();
}
static int cbc_encrypt(struct skcipher_request *req)
{
- const unsigned int bsize = CAST5_BLOCK_SIZE;
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
- struct skcipher_walk walk;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- u64 *src = (u64 *)walk.src.virt.addr;
- u64 *dst = (u64 *)walk.dst.virt.addr;
- u64 *iv = (u64 *)walk.iv;
-
- do {
- *dst = *src ^ *iv;
- __cast5_encrypt(ctx, (u8 *)dst, (u8 *)dst);
- iv = dst;
- src++;
- dst++;
- nbytes -= bsize;
- } while (nbytes >= bsize);
-
- *(u64 *)walk.iv = *iv;
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- return err;
-}
-
-static unsigned int __cbc_decrypt(struct cast5_ctx *ctx,
- struct skcipher_walk *walk)
-{
- const unsigned int bsize = CAST5_BLOCK_SIZE;
- unsigned int nbytes = walk->nbytes;
- u64 *src = (u64 *)walk->src.virt.addr;
- u64 *dst = (u64 *)walk->dst.virt.addr;
- u64 last_iv;
-
- /* Start of the last block. */
- src += nbytes / bsize - 1;
- dst += nbytes / bsize - 1;
-
- last_iv = *src;
-
- /* Process multi-block batch */
- if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
- do {
- nbytes -= bsize * (CAST5_PARALLEL_BLOCKS - 1);
- src -= CAST5_PARALLEL_BLOCKS - 1;
- dst -= CAST5_PARALLEL_BLOCKS - 1;
-
- cast5_cbc_dec_16way(ctx, (u8 *)dst, (u8 *)src);
-
- nbytes -= bsize;
- if (nbytes < bsize)
- goto done;
-
- *dst ^= *(src - 1);
- src -= 1;
- dst -= 1;
- } while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);
- }
-
- /* Handle leftovers */
- for (;;) {
- __cast5_decrypt(ctx, (u8 *)dst, (u8 *)src);
-
- nbytes -= bsize;
- if (nbytes < bsize)
- break;
-
- *dst ^= *(src - 1);
- src -= 1;
- dst -= 1;
- }
-
-done:
- *dst ^= *(u64 *)walk->iv;
- *(u64 *)walk->iv = last_iv;
-
- return nbytes;
+ CBC_WALK_START(req, CAST5_BLOCK_SIZE, -1);
+ CBC_ENC_BLOCK(__cast5_encrypt);
+ CBC_WALK_END();
}
static int cbc_decrypt(struct skcipher_request *req)
{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
- bool fpu_enabled = false;
- struct skcipher_walk walk;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
- nbytes = __cbc_decrypt(ctx, &walk);
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- cast5_fpu_end(fpu_enabled);
- return err;
+ CBC_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
+ CBC_DEC_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_cbc_dec_16way);
+ CBC_DEC_BLOCK(1, __cast5_decrypt);
+ CBC_WALK_END();
}
static struct skcipher_alg cast5_algs[] = {
