OpenWrt – Rev 1
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From a8d79d7bfb14f471914017103ee2329a74e5e89d Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Thu, 19 Apr 2018 18:41:51 +0200
Subject: crypto: crypto4xx - performance optimizations
This patch provides a cheap 2MiB/s+ (~ 6%) performance
improvement over the current code. This is because the
compiler can now optimize several endian swap memcpy.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
drivers/crypto/amcc/crypto4xx_alg.c | 32 +++++++++++++++++++-------------
drivers/crypto/amcc/crypto4xx_core.c | 22 +++++++++++-----------
drivers/crypto/amcc/crypto4xx_core.h | 6 ++++--
3 files changed, 34 insertions(+), 26 deletions(-)
--- a/drivers/crypto/amcc/crypto4xx_alg.c
+++ b/drivers/crypto/amcc/crypto4xx_alg.c
@@ -74,32 +74,38 @@ static void set_dynamic_sa_command_1(str
sa->sa_command_1.bf.copy_hdr = cp_hdr;
}
-int crypto4xx_encrypt(struct ablkcipher_request *req)
+static inline int crypto4xx_crypt(struct ablkcipher_request *req,
+ const unsigned int ivlen, bool decrypt)
{
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
- unsigned int ivlen = crypto_ablkcipher_ivsize(
- crypto_ablkcipher_reqtfm(req));
__le32 iv[ivlen];
if (ivlen)
crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
- req->nbytes, iv, ivlen, ctx->sa_out, ctx->sa_len, 0);
+ req->nbytes, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
+ ctx->sa_len, 0);
}
-int crypto4xx_decrypt(struct ablkcipher_request *req)
+int crypto4xx_encrypt_noiv(struct ablkcipher_request *req)
{
- struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
- unsigned int ivlen = crypto_ablkcipher_ivsize(
- crypto_ablkcipher_reqtfm(req));
- __le32 iv[ivlen];
+ return crypto4xx_crypt(req, 0, false);
+}
- if (ivlen)
- crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
+int crypto4xx_encrypt_iv(struct ablkcipher_request *req)
+{
+ return crypto4xx_crypt(req, AES_IV_SIZE, false);
+}
- return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
- req->nbytes, iv, ivlen, ctx->sa_in, ctx->sa_len, 0);
+int crypto4xx_decrypt_noiv(struct ablkcipher_request *req)
+{
+ return crypto4xx_crypt(req, 0, true);
+}
+
+int crypto4xx_decrypt_iv(struct ablkcipher_request *req)
+{
+ return crypto4xx_crypt(req, AES_IV_SIZE, true);
}
/**
--- a/drivers/crypto/amcc/crypto4xx_core.c
+++ b/drivers/crypto/amcc/crypto4xx_core.c
@@ -580,7 +580,7 @@ static void crypto4xx_aead_done(struct c
struct scatterlist *dst = pd_uinfo->dest_va;
size_t cp_len = crypto_aead_authsize(
crypto_aead_reqtfm(aead_req));
- u32 icv[cp_len];
+ u32 icv[AES_BLOCK_SIZE];
int err = 0;
if (pd_uinfo->using_sd) {
@@ -595,7 +595,7 @@ static void crypto4xx_aead_done(struct c
if (pd_uinfo->sa_va->sa_command_0.bf.dir == DIR_OUTBOUND) {
/* append icv at the end */
crypto4xx_memcpy_from_le32(icv, pd_uinfo->sr_va->save_digest,
- cp_len);
+ sizeof(icv));
scatterwalk_map_and_copy(icv, dst, aead_req->cryptlen,
cp_len, 1);
@@ -605,7 +605,7 @@ static void crypto4xx_aead_done(struct c
aead_req->assoclen + aead_req->cryptlen -
cp_len, cp_len, 0);
- crypto4xx_memcpy_from_le32(icv, icv, cp_len);
+ crypto4xx_memcpy_from_le32(icv, icv, sizeof(icv));
if (crypto_memneq(icv, pd_uinfo->sr_va->save_digest, cp_len))
err = -EBADMSG;
@@ -1122,8 +1122,8 @@ static struct crypto4xx_alg_common crypt
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_IV_SIZE,
.setkey = crypto4xx_setkey_aes_cbc,
- .encrypt = crypto4xx_encrypt,
- .decrypt = crypto4xx_decrypt,
+ .encrypt = crypto4xx_encrypt_iv,
+ .decrypt = crypto4xx_decrypt_iv,
}
}
}},
@@ -1146,8 +1146,8 @@ static struct crypto4xx_alg_common crypt
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_IV_SIZE,
.setkey = crypto4xx_setkey_aes_cfb,
- .encrypt = crypto4xx_encrypt,
- .decrypt = crypto4xx_decrypt,
+ .encrypt = crypto4xx_encrypt_iv,
+ .decrypt = crypto4xx_decrypt_iv,
}
}
} },
@@ -1195,8 +1195,8 @@ static struct crypto4xx_alg_common crypt
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = crypto4xx_setkey_aes_ecb,
- .encrypt = crypto4xx_encrypt,
- .decrypt = crypto4xx_decrypt,
+ .encrypt = crypto4xx_encrypt_noiv,
+ .decrypt = crypto4xx_decrypt_noiv,
}
}
} },
@@ -1219,8 +1219,8 @@ static struct crypto4xx_alg_common crypt
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_IV_SIZE,
.setkey = crypto4xx_setkey_aes_ofb,
- .encrypt = crypto4xx_encrypt,
- .decrypt = crypto4xx_decrypt,
+ .encrypt = crypto4xx_encrypt_iv,
+ .decrypt = crypto4xx_decrypt_iv,
}
}
} },
--- a/drivers/crypto/amcc/crypto4xx_core.h
+++ b/drivers/crypto/amcc/crypto4xx_core.h
@@ -168,8 +168,10 @@ int crypto4xx_setkey_aes_ofb(struct cryp
const u8 *key, unsigned int keylen);
int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher,
const u8 *key, unsigned int keylen);
-int crypto4xx_encrypt(struct ablkcipher_request *req);
-int crypto4xx_decrypt(struct ablkcipher_request *req);
+int crypto4xx_encrypt_iv(struct ablkcipher_request *req);
+int crypto4xx_decrypt_iv(struct ablkcipher_request *req);
+int crypto4xx_encrypt_noiv(struct ablkcipher_request *req);
+int crypto4xx_decrypt_noiv(struct ablkcipher_request *req);
int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req);
int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req);
int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);