From: Horia Geanta Subject: [PATCH 1/4] crypto: add CRYPTO_TFM_REQ_DMA flag Date: Fri, 13 Mar 2015 19:14:42 +0200 Message-ID: <1426266882-31626-1-git-send-email-horia.geanta@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Kim Phillips To: , Herbert Xu Return-path: Received: from mail-by2on0115.outbound.protection.outlook.com ([207.46.100.115]:35586 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751210AbbCMRPG (ORCPT ); Fri, 13 Mar 2015 13:15:06 -0400 Sender: linux-crypto-owner@vger.kernel.org List-ID: The CRYPTO_TFM_REQ_DMA flag can be used by backend implementations to indicate to crypto API the need to allocate GFP_DMA memory for private contexts of the crypto requests. Signed-off-by: Horia Geanta --- include/linux/crypto.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/crypto.h b/include/linux/crypto.h index fb5ef16d6a12..64258c9198d5 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -103,6 +103,7 @@ #define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 +#define CRYPTO_TFM_REQ_DMA 0x00000800 #define CRYPTO_TFM_RES_WEAK_KEY 0x00100000 #define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000 #define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000 @@ -1108,6 +1109,10 @@ static inline struct ablkcipher_request *ablkcipher_request_alloc( { struct ablkcipher_request *req; + if (crypto_ablkcipher_reqsize(tfm) && + (crypto_ablkcipher_get_flags(tfm) & CRYPTO_TFM_REQ_DMA)) + gfp |= GFP_DMA; + req = kmalloc(sizeof(struct ablkcipher_request) + crypto_ablkcipher_reqsize(tfm), gfp); @@ -1471,6 +1476,10 @@ static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, { struct aead_request *req; + if (crypto_aead_reqsize(tfm) && + (crypto_aead_get_flags(tfm) & CRYPTO_TFM_REQ_DMA)) + gfp |= GFP_DMA; + req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp); if (likely(req)) -- 1.8.3.1