From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailhub1.si.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by lists.ozlabs.org (Postfix) with ESMTP id D46571A0567 for ; Sat, 7 Mar 2015 03:39:07 +1100 (AEDT) From: Christophe Leroy To: Kim Phillips , Herbert Xu , "David S. Miller" Subject: [PATCH v2 05/17] crypto: talitos - isolate scatter/gather handling for ahash Message-Id: <20150306163905.AB8DE1A241C@localhost.localdomain> Date: Fri, 6 Mar 2015 17:39:05 +0100 (CET) Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , SEC1 doesn't support scatter/gather, therefore this part of the code will have to be implemented differently for SEC1, so we isolate it in a small helper function Signed-off-by: Christophe Leroy --- drivers/crypto/talitos.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 3165364..76e636b 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1707,6 +1707,23 @@ static int ahash_init_sha224_swinit(struct ahash_request *areq) return 0; } +static void ahash_process_chain(struct scatterlist *src, int nbytes, + bool *chained, + struct talitos_ahash_req_ctx *req_ctx, + int nbytes_to_hash) +{ + if (req_ctx->nbuf) { + unsigned int nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1; + + sg_init_table(req_ctx->bufsl, nsg); + sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf); + if (nsg > 1) + scatterwalk_sg_chain(req_ctx->bufsl, 2, src); + req_ctx->psrc = req_ctx->bufsl; + } else + req_ctx->psrc = src; +} + static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) { struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); @@ -1717,7 +1734,6 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); unsigned int nbytes_to_hash; unsigned int to_hash_later; - unsigned int nsg; bool chained; if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) { @@ -1745,15 +1761,8 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) } /* Chain in any previously buffered data */ - if (req_ctx->nbuf) { - nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1; - sg_init_table(req_ctx->bufsl, nsg); - sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf); - if (nsg > 1) - scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src); - req_ctx->psrc = req_ctx->bufsl; - } else - req_ctx->psrc = areq->src; + ahash_process_chain(areq->src, nbytes, &chained, req_ctx, + nbytes_to_hash); if (to_hash_later) { int nents = sg_count(areq->src, nbytes, &chained); -- 2.1.0