From patchwork Tue May 31 13:55:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 9144895 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 E758960761 for ; Tue, 31 May 2016 13:55:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DAAD724B5B for ; Tue, 31 May 2016 13:55:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CF93D2793B; Tue, 31 May 2016 13:55:57 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 724ED27B89 for ; Tue, 31 May 2016 13:55:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754200AbcEaNz4 (ORCPT ); Tue, 31 May 2016 09:55:56 -0400 Received: from mga03.intel.com ([134.134.136.65]:58946 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754495AbcEaNzy (ORCPT ); Tue, 31 May 2016 09:55:54 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP; 31 May 2016 06:55:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,395,1459839600"; d="scan'208";a="988092516" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga002.jf.intel.com with ESMTP; 31 May 2016 06:55:46 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id u4VDtjvY021999; Tue, 31 May 2016 14:55:45 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id u4VDtjaI028228; Tue, 31 May 2016 14:55:45 +0100 Received: (from gcabiddu@localhost) by sivswdev01.ir.intel.com with id u4VDtjVw028224; Tue, 31 May 2016 14:55:45 +0100 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, Giovanni Cabiddu Subject: [PATCH v4 08/10] crypto: acomp - add support for 842 via scomp Date: Tue, 31 May 2016 14:55:34 +0100 Message-Id: <1464702936-27627-9-git-send-email-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1464702936-27627-1-git-send-email-giovanni.cabiddu@intel.com> References: <1464702936-27627-1-git-send-email-giovanni.cabiddu@intel.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch implements an scomp backend for the 842 compression algorithm. This way, 842 is exposed through the acomp api. Signed-off-by: Giovanni Cabiddu --- crypto/842.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- crypto/Kconfig | 1 + 2 files changed, 80 insertions(+), 3 deletions(-) diff --git a/crypto/842.c b/crypto/842.c index 98e387e..a433ac3 100644 --- a/crypto/842.c +++ b/crypto/842.c @@ -31,11 +31,46 @@ #include #include #include +#include struct crypto842_ctx { - char wmem[SW842_MEM_COMPRESS]; /* working memory for compress */ + void *wmem; /* working memory for compress */ }; +static void *crypto842_alloc_ctx(struct crypto_scomp *tfm) +{ + void *ctx; + + ctx = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL); + if (!ctx) + return ERR_PTR(-ENOMEM); + + return ctx; +} + +static int crypto842_init(struct crypto_tfm *tfm) +{ + struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm); + + ctx->wmem = crypto842_alloc_ctx(NULL); + if (IS_ERR(ctx->wmem)) + return -ENOMEM; + + return 0; +} + +static void crypto842_free_ctx(struct crypto_scomp *tfm, void *ctx) +{ + kfree(ctx); +} + +static void crypto842_exit(struct crypto_tfm *tfm) +{ + struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm); + + crypto842_free_ctx(NULL, ctx->wmem); +} + static int crypto842_compress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) @@ -45,6 +80,13 @@ static int crypto842_compress(struct crypto_tfm *tfm, return sw842_compress(src, slen, dst, dlen, ctx->wmem); } +static int crypto842_scompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return sw842_compress(src, slen, dst, dlen, ctx); +} + static int crypto842_decompress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) @@ -52,27 +94,61 @@ static int crypto842_decompress(struct crypto_tfm *tfm, return sw842_decompress(src, slen, dst, dlen); } +static int crypto842_sdecompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return sw842_decompress(src, slen, dst, dlen); +} + static struct crypto_alg alg = { .cra_name = "842", .cra_driver_name = "842-generic", .cra_priority = 100, .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, - .cra_ctxsize = sizeof(struct crypto842_ctx), .cra_module = THIS_MODULE, + .cra_init = crypto842_init, + .cra_exit = crypto842_exit, .cra_u = { .compress = { .coa_compress = crypto842_compress, .coa_decompress = crypto842_decompress } } }; +static struct scomp_alg scomp = { + .alloc_ctx = crypto842_alloc_ctx, + .free_ctx = crypto842_free_ctx, + .compress = crypto842_scompress, + .decompress = crypto842_sdecompress, + .base = { + .cra_name = "842", + .cra_driver_name = "842-scomp", + .cra_priority = 100, + .cra_module = THIS_MODULE, + } +}; + static int __init crypto842_mod_init(void) { - return crypto_register_alg(&alg); + int ret; + + ret = crypto_register_alg(&alg); + if (ret) + return ret; + + ret = crypto_register_scomp_qdecomp(&scomp); + if (ret) { + crypto_unregister_alg(&alg); + return ret; + } + + return ret; } module_init(crypto842_mod_init); static void __exit crypto842_mod_exit(void) { crypto_unregister_alg(&alg); + crypto_unregister_scomp(&scomp); } module_exit(crypto842_mod_exit); diff --git a/crypto/Kconfig b/crypto/Kconfig index 59570da..09c88ba 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1522,6 +1522,7 @@ config CRYPTO_LZO config CRYPTO_842 tristate "842 compression algorithm" select CRYPTO_ALGAPI + select CRYPTO_ACOMP2 select 842_COMPRESS select 842_DECOMPRESS help