[PATCH v2 18/21] crypto: x86/cast6 - drop dependency on glue helper

[Ard Biesheuvel <ardb@xxxxxxxxxx>]

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@xxxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
 arch/x86/crypto/cast6_avx_glue.c | 61 ++++++--------------
 crypto/Kconfig                   |  1 -
 2 files changed, 17 insertions(+), 45 deletions(-)

diff --git a/arch/x86/crypto/cast6_avx_glue.c b/arch/x86/crypto/cast6_avx_glue.c
index 790efcb6df3b..7e2aea372349 100644
--- a/arch/x86/crypto/cast6_avx_glue.c
+++ b/arch/x86/crypto/cast6_avx_glue.c
@@ -15,7 +15,8 @@
 #include <crypto/algapi.h>
 #include <crypto/cast6.h>
 #include <crypto/internal/simd.h>
-#include <asm/crypto/glue_helper.h>
+
+#include "ecb_cbc_helpers.h"
 
 #define CAST6_PARALLEL_BLOCKS 8
 
@@ -30,63 +31,35 @@ static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
 	return cast6_setkey(&tfm->base, key, keylen);
 }
 
-static const struct common_glue_ctx cast6_enc = {
-	.num_funcs = 2,
-	.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
-
-	.funcs = { {
-		.num_blocks = CAST6_PARALLEL_BLOCKS,
-		.fn_u = { .ecb = cast6_ecb_enc_8way }
-	}, {
-		.num_blocks = 1,
-		.fn_u = { .ecb = __cast6_encrypt }
-	} }
-};
-
-static const struct common_glue_ctx cast6_dec = {
-	.num_funcs = 2,
-	.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
-
-	.funcs = { {
-		.num_blocks = CAST6_PARALLEL_BLOCKS,
-		.fn_u = { .ecb = cast6_ecb_dec_8way }
-	}, {
-		.num_blocks = 1,
-		.fn_u = { .ecb = __cast6_decrypt }
-	} }
-};
-
-static const struct common_glue_ctx cast6_dec_cbc = {
-	.num_funcs = 2,
-	.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
-
-	.funcs = { {
-		.num_blocks = CAST6_PARALLEL_BLOCKS,
-		.fn_u = { .cbc = cast6_cbc_dec_8way }
-	}, {
-		.num_blocks = 1,
-		.fn_u = { .cbc = __cast6_decrypt }
-	} }
-};
-
 static int ecb_encrypt(struct skcipher_request *req)
 {
-	return glue_ecb_req_128bit(&cast6_enc, req);
+	ECB_WALK_START(req, CAST6_BLOCK_SIZE, CAST6_PARALLEL_BLOCKS);
+	ECB_BLOCK(CAST6_PARALLEL_BLOCKS, cast6_ecb_enc_8way);
+	ECB_BLOCK(1, __cast6_encrypt);
+	ECB_WALK_END();
 }
 
 static int ecb_decrypt(struct skcipher_request *req)
 {
-	return glue_ecb_req_128bit(&cast6_dec, req);
+	ECB_WALK_START(req, CAST6_BLOCK_SIZE, CAST6_PARALLEL_BLOCKS);
+	ECB_BLOCK(CAST6_PARALLEL_BLOCKS, cast6_ecb_dec_8way);
+	ECB_BLOCK(1, __cast6_decrypt);
+	ECB_WALK_END();
 }
 
 static int cbc_encrypt(struct skcipher_request *req)
 {
-	return glue_cbc_encrypt_req_128bit(__cast6_encrypt, req);
+	CBC_WALK_START(req, CAST6_BLOCK_SIZE, -1);
+	CBC_ENC_BLOCK(__cast6_encrypt);
+	CBC_WALK_END();
 }
 
 static int cbc_decrypt(struct skcipher_request *req)
 {
-	return glue_cbc_decrypt_req_128bit(&cast6_dec_cbc, req);
+	CBC_WALK_START(req, CAST6_BLOCK_SIZE, CAST6_PARALLEL_BLOCKS);
+	CBC_DEC_BLOCK(CAST6_PARALLEL_BLOCKS, cast6_cbc_dec_8way);
+	CBC_DEC_BLOCK(1, __cast6_decrypt);
+	CBC_WALK_END();
 }
 
 static struct skcipher_alg cast6_algs[] = {
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 29dce7efc443..25101558acb5 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1393,7 +1393,6 @@ config CRYPTO_CAST6_AVX_X86_64
 	select CRYPTO_SKCIPHER
 	select CRYPTO_CAST6
 	select CRYPTO_CAST_COMMON
-	select CRYPTO_GLUE_HELPER_X86
 	select CRYPTO_SIMD
 	imply CRYPTO_XTS
 	imply CRYPTO_CTR
-- 
2.17.1