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crypto: crypto4xx - performance optimizations

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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>
This commit is contained in:
Christian Lamparter
2018-04-19 18:41:51 +02:00
committed by Herbert Xu
parent 5b0aa2556e
commit a8d79d7bfb
3 changed files with 34 additions and 26 deletions
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32
drivers/crypto/amcc/crypto4xx_alg.c
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@@ -74,32 +74,38 @@ static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
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);
}
/**