From patchwork Thu Dec 22 16:37:53 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyrille Pitchen X-Patchwork-Id: 9485341 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 34D55601C0 for ; Thu, 22 Dec 2016 16:40:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 27A1428066 for ; Thu, 22 Dec 2016 16:40:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C9342811E; Thu, 22 Dec 2016 16:40:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C590D28066 for ; Thu, 22 Dec 2016 16:40:23 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK6OT-0004Z4-N1; Thu, 22 Dec 2016 16:39:01 +0000 Received: from exsmtp02.microchip.com ([198.175.253.38] helo=email.microchip.com) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK6Ni-0003x3-K4 for linux-arm-kernel@lists.infradead.org; Thu, 22 Dec 2016 16:38:16 +0000 Received: from tenerife.corp.atmel.com (10.10.76.4) by chn-sv-exch02.mchp-main.com (10.10.76.38) with Microsoft SMTP Server id 14.3.181.6; Thu, 22 Dec 2016 09:37:58 -0700 From: Cyrille Pitchen To: , , Subject: [PATCH v2 04/12] crypto: atmel-sha: redefine SHA_FLAGS_SHA* flags to match SHA_MR_ALGO_SHA* Date: Thu, 22 Dec 2016 17:37:53 +0100 Message-ID: <31213519617e6504fe812e377d0a5f246bc46fb2.1482424395.git.cyrille.pitchen@atmel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: MIME-Version: 1.0 X-Brightmail-Tracker: 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161222_083814_808785_00508987 X-CRM114-Status: GOOD ( 11.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cyrille Pitchen , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch modifies the SHA_FLAGS_SHA* flags: those algo flags are now organized as values of a single bitfield instead of individual bits. This allows to reduce the number of bits needed to encode all possible values. Also the new values match the SHA_MR_ALGO_SHA* values hence the algorithm bitfield of the SHA_MR register could simply be set with: mr = (mr & ~SHA_FLAGS_ALGO_MASK) | (ctx->flags & SHA_FLAGS_ALGO_MASK) Signed-off-by: Cyrille Pitchen --- drivers/crypto/atmel-sha-regs.h | 1 + drivers/crypto/atmel-sha.c | 45 +++++++++++++++++++++++++++++------------ 2 files changed, 33 insertions(+), 13 deletions(-) diff --git a/drivers/crypto/atmel-sha-regs.h b/drivers/crypto/atmel-sha-regs.h index e08897109cab..deb0b0b15096 100644 --- a/drivers/crypto/atmel-sha-regs.h +++ b/drivers/crypto/atmel-sha-regs.h @@ -19,6 +19,7 @@ #define SHA_MR_PROCDLY (1 << 4) #define SHA_MR_UIHV (1 << 5) #define SHA_MR_UIEHV (1 << 6) +#define SHA_MR_ALGO_MASK GENMASK(10, 8) #define SHA_MR_ALGO_SHA1 (0 << 8) #define SHA_MR_ALGO_SHA256 (1 << 8) #define SHA_MR_ALGO_SHA384 (2 << 8) diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c index 643d79a05dda..b29a4e5bc404 100644 --- a/drivers/crypto/atmel-sha.c +++ b/drivers/crypto/atmel-sha.c @@ -51,14 +51,16 @@ #define SHA_FLAGS_CPU BIT(5) #define SHA_FLAGS_DMA_READY BIT(6) +/* bits[10:8] are reserved. */ +#define SHA_FLAGS_ALGO_MASK SHA_MR_ALGO_MASK +#define SHA_FLAGS_SHA1 SHA_MR_ALGO_SHA1 +#define SHA_FLAGS_SHA256 SHA_MR_ALGO_SHA256 +#define SHA_FLAGS_SHA384 SHA_MR_ALGO_SHA384 +#define SHA_FLAGS_SHA512 SHA_MR_ALGO_SHA512 +#define SHA_FLAGS_SHA224 SHA_MR_ALGO_SHA224 + #define SHA_FLAGS_FINUP BIT(16) #define SHA_FLAGS_SG BIT(17) -#define SHA_FLAGS_ALGO_MASK GENMASK(22, 18) -#define SHA_FLAGS_SHA1 BIT(18) -#define SHA_FLAGS_SHA224 BIT(19) -#define SHA_FLAGS_SHA256 BIT(20) -#define SHA_FLAGS_SHA384 BIT(21) -#define SHA_FLAGS_SHA512 BIT(22) #define SHA_FLAGS_ERROR BIT(23) #define SHA_FLAGS_PAD BIT(24) #define SHA_FLAGS_RESTORE BIT(25) @@ -264,7 +266,9 @@ static void atmel_sha_fill_padding(struct atmel_sha_reqctx *ctx, int length) bits[1] = cpu_to_be64(size[0] << 3); bits[0] = cpu_to_be64(size[1] << 3 | size[0] >> 61); - if (ctx->flags & (SHA_FLAGS_SHA384 | SHA_FLAGS_SHA512)) { + switch (ctx->flags & SHA_FLAGS_ALGO_MASK) { + case SHA_FLAGS_SHA384: + case SHA_FLAGS_SHA512: index = ctx->bufcnt & 0x7f; padlen = (index < 112) ? (112 - index) : ((128+112) - index); *(ctx->buffer + ctx->bufcnt) = 0x80; @@ -272,7 +276,9 @@ static void atmel_sha_fill_padding(struct atmel_sha_reqctx *ctx, int length) memcpy(ctx->buffer + ctx->bufcnt + padlen, bits, 16); ctx->bufcnt += padlen + 16; ctx->flags |= SHA_FLAGS_PAD; - } else { + break; + + default: index = ctx->bufcnt & 0x3f; padlen = (index < 56) ? (56 - index) : ((64+56) - index); *(ctx->buffer + ctx->bufcnt) = 0x80; @@ -280,6 +286,7 @@ static void atmel_sha_fill_padding(struct atmel_sha_reqctx *ctx, int length) memcpy(ctx->buffer + ctx->bufcnt + padlen, &bits[1], 8); ctx->bufcnt += padlen + 8; ctx->flags |= SHA_FLAGS_PAD; + break; } } @@ -828,16 +835,28 @@ static void atmel_sha_copy_ready_hash(struct ahash_request *req) if (!req->result) return; - if (ctx->flags & SHA_FLAGS_SHA1) + switch (ctx->flags & SHA_FLAGS_ALGO_MASK) { + default: + case SHA_FLAGS_SHA1: memcpy(req->result, ctx->digest, SHA1_DIGEST_SIZE); - else if (ctx->flags & SHA_FLAGS_SHA224) + break; + + case SHA_FLAGS_SHA224: memcpy(req->result, ctx->digest, SHA224_DIGEST_SIZE); - else if (ctx->flags & SHA_FLAGS_SHA256) + break; + + case SHA_FLAGS_SHA256: memcpy(req->result, ctx->digest, SHA256_DIGEST_SIZE); - else if (ctx->flags & SHA_FLAGS_SHA384) + break; + + case SHA_FLAGS_SHA384: memcpy(req->result, ctx->digest, SHA384_DIGEST_SIZE); - else + break; + + case SHA_FLAGS_SHA512: memcpy(req->result, ctx->digest, SHA512_DIGEST_SIZE); + break; + } } static int atmel_sha_finish(struct ahash_request *req)