Commit a6479ea4 authored by Russell King's avatar Russell King Committed by Herbert Xu
Browse files

crypto: marvell/cesa - factor out common import/export functions 



As all the import functions and export functions are virtually
identical, factor out their common parts into a generic
mv_cesa_ahash_import() and mv_cesa_ahash_export() respectively.  This
performs the actual import or export, and we pass the data pointers and
length into these functions.

We have to switch a % const operation to do_div() in the common import
function to avoid provoking gcc to use the expensive 64-bit by 64-bit
modulus operation.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Acked-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent c3bf02a2

drivers/crypto/marvell/hash.c

+53 −104
Original line number Diff line number Diff line
@@ -797,39 +797,32 @@ static int mv_cesa_ahash_finup(struct ahash_request *req) 
	return ret;

}



static int mv_cesa_md5_init(struct ahash_request *req)

static int mv_cesa_ahash_export(struct ahash_request *req, void *hash,

				u64 *len, void *cache)

{

	struct mv_cesa_op_ctx tmpl;



	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_MACM_MD5);



	mv_cesa_ahash_init(req, &tmpl);



	return 0;

}



static int mv_cesa_md5_export(struct ahash_request *req, void *out)

{

	struct md5_state *out_state = out;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int digsize = crypto_ahash_digestsize(ahash);

	unsigned int blocksize;



	blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(ahash));



	out_state->byte_count = creq->len;

	memcpy(out_state->hash, creq->state, digsize);

	memset(out_state->block, 0, sizeof(out_state->block));

	*len = creq->len;

	memcpy(hash, creq->state, digsize);

	memset(cache, 0, blocksize);

	if (creq->cache)

		memcpy(out_state->block, creq->cache, creq->cache_ptr);

		memcpy(cache, creq->cache, creq->cache_ptr);



	return 0;

}



static int mv_cesa_md5_import(struct ahash_request *req, const void *in)

static int mv_cesa_ahash_import(struct ahash_request *req, const void *hash,

				u64 len, const void *cache)

{

	const struct md5_state *in_state = in;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int digsize = crypto_ahash_digestsize(ahash);

	unsigned int blocksize;

	unsigned int cache_ptr;

	int ret;
@@ -837,16 +830,17 @@ static int mv_cesa_md5_import(struct ahash_request *req, const void *in) 
	if (ret)

		return ret;



	if (in_state->byte_count >= sizeof(in_state->block))

	blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(ahash));

	if (len >= blocksize)

		mv_cesa_update_op_cfg(&creq->op_tmpl,

				      CESA_SA_DESC_CFG_MID_FRAG,

				      CESA_SA_DESC_CFG_FRAG_MSK);



	creq->len = in_state->byte_count;

	memcpy(creq->state, in_state->hash, digsize);

	creq->len = len;

	memcpy(creq->state, hash, digsize);

	creq->cache_ptr = 0;



	cache_ptr = creq->len % sizeof(in_state->block);

	cache_ptr = do_div(len, blocksize);

	if (!cache_ptr)

		return 0;
@@ -854,12 +848,39 @@ static int mv_cesa_md5_import(struct ahash_request *req, const void *in) 
	if (ret)

		return ret;



	memcpy(creq->cache, in_state->block, cache_ptr);

	memcpy(creq->cache, cache, cache_ptr);

	creq->cache_ptr = cache_ptr;



	return 0;

}



static int mv_cesa_md5_init(struct ahash_request *req)

{

	struct mv_cesa_op_ctx tmpl;



	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_MACM_MD5);



	mv_cesa_ahash_init(req, &tmpl);



	return 0;

}



static int mv_cesa_md5_export(struct ahash_request *req, void *out)

{

	struct md5_state *out_state = out;



	return mv_cesa_ahash_export(req, out_state->hash,

				    &out_state->byte_count, out_state->block);

}



static int mv_cesa_md5_import(struct ahash_request *req, const void *in)

{

	const struct md5_state *in_state = in;



	return mv_cesa_ahash_import(req, in_state->hash, in_state->byte_count,

				    in_state->block);

}



static int mv_cesa_md5_digest(struct ahash_request *req)

{

	int ret;
@@ -910,53 +931,17 @@ static int mv_cesa_sha1_init(struct ahash_request *req) 
static int mv_cesa_sha1_export(struct ahash_request *req, void *out)

{

	struct sha1_state *out_state = out;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int digsize = crypto_ahash_digestsize(ahash);



	out_state->count = creq->len;

	memcpy(out_state->state, creq->state, digsize);

	memset(out_state->buffer, 0, sizeof(out_state->buffer));

	if (creq->cache)

		memcpy(out_state->buffer, creq->cache, creq->cache_ptr);



	return 0;

	return mv_cesa_ahash_export(req, out_state->state, &out_state->count,

				    out_state->buffer);

}



static int mv_cesa_sha1_import(struct ahash_request *req, const void *in)

{

	const struct sha1_state *in_state = in;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int digsize = crypto_ahash_digestsize(ahash);

	unsigned int cache_ptr;

	int ret;



	ret = crypto_ahash_init(req);

	if (ret)

		return ret;



	if (in_state->count >= SHA1_BLOCK_SIZE)

		mv_cesa_update_op_cfg(&creq->op_tmpl,

				      CESA_SA_DESC_CFG_MID_FRAG,

				      CESA_SA_DESC_CFG_FRAG_MSK);



	creq->len = in_state->count;

	memcpy(creq->state, in_state->state, digsize);

	creq->cache_ptr = 0;



	cache_ptr = creq->len % SHA1_BLOCK_SIZE;

	if (!cache_ptr)

		return 0;



	ret = mv_cesa_ahash_alloc_cache(req);

	if (ret)

		return ret;



	memcpy(creq->cache, in_state->buffer, cache_ptr);

	creq->cache_ptr = cache_ptr;



	return 0;

	return mv_cesa_ahash_import(req, in_state->state, in_state->count,

				    in_state->buffer);

}



static int mv_cesa_sha1_digest(struct ahash_request *req)
@@ -1020,53 +1005,17 @@ static int mv_cesa_sha256_digest(struct ahash_request *req) 
static int mv_cesa_sha256_export(struct ahash_request *req, void *out)

{

	struct sha256_state *out_state = out;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int ds = crypto_ahash_digestsize(ahash);



	out_state->count = creq->len;

	memcpy(out_state->state, creq->state, ds);

	memset(out_state->buf, 0, sizeof(out_state->buf));

	if (creq->cache)

		memcpy(out_state->buf, creq->cache, creq->cache_ptr);



	return 0;

	return mv_cesa_ahash_export(req, out_state->state, &out_state->count,

				    out_state->buf);

}



static int mv_cesa_sha256_import(struct ahash_request *req, const void *in)

{

	const struct sha256_state *in_state = in;

	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);

	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);

	unsigned int digsize = crypto_ahash_digestsize(ahash);

	unsigned int cache_ptr;

	int ret;



	ret = crypto_ahash_init(req);

	if (ret)

		return ret;



	if (in_state->count >= SHA256_BLOCK_SIZE)

		mv_cesa_update_op_cfg(&creq->op_tmpl,

				      CESA_SA_DESC_CFG_MID_FRAG,

				      CESA_SA_DESC_CFG_FRAG_MSK);



	creq->len = in_state->count;

	memcpy(creq->state, in_state->state, digsize);

	creq->cache_ptr = 0;



	cache_ptr = creq->len % SHA256_BLOCK_SIZE;

	if (!cache_ptr)

		return 0;



	ret = mv_cesa_ahash_alloc_cache(req);

	if (ret)

		return ret;



	memcpy(creq->cache, in_state->buf, cache_ptr);

	creq->cache_ptr = cache_ptr;



	return 0;

	return mv_cesa_ahash_import(req, in_state->state, in_state->count,

				    in_state->buf);

}



struct ahash_alg mv_sha256_alg = {

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