From patchwork Wed Aug 14 23:12:48 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 2844874 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 773AE9F7D6 for ; Wed, 14 Aug 2013 23:15:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 890F02047D for ; Wed, 14 Aug 2013 23:15:25 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 674B920450 for ; Wed, 14 Aug 2013 23:15:24 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V9kH0-0005k8-By; Wed, 14 Aug 2013 23:14:39 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1V9kGi-0001I6-VB; Wed, 14 Aug 2013 23:14:20 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V9kG1-0001CB-EB for linux-arm-kernel@lists.infradead.org; Wed, 14 Aug 2013 23:13:42 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id r7ENDDuG031217; Wed, 14 Aug 2013 18:13:13 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id r7ENDDIL026628; Wed, 14 Aug 2013 18:13:13 -0500 Received: from dlelxv22.itg.ti.com (172.17.1.197) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.2.342.3; Wed, 14 Aug 2013 18:13:12 -0500 Received: from joel-laptop.itg.ti.com (h56-176.vpn.ti.com [172.24.56.176]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id r7ENCnGu031508; Wed, 14 Aug 2013 18:13:12 -0500 From: Joel Fernandes To: Herbert Xu , "David S. Miller" , Mark Greer , Tony Lindgren , Santosh Shilimkar , Rajendra Nayak , Lokesh Vutla Subject: [PATCH 09/10] crypto: omap-aes: PIO mode: platform data for OMAP4 and trigger it Date: Wed, 14 Aug 2013 18:12:48 -0500 Message-ID: <1376521969-16807-10-git-send-email-joelf@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1376521969-16807-1-git-send-email-joelf@ti.com> References: <1376521969-16807-1-git-send-email-joelf@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130814_191337_666192_8397357D X-CRM114-Status: GOOD ( 12.81 ) X-Spam-Score: -9.7 (---------) Cc: Joel Fernandes , Linux OMAP List , Linux Kernel Mailing List , Linux ARM Kernel List , Linux Crypto Mailing List X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We initialize the scatter gather walk lists needed for PIO mode and avoid all DMA paths such as mapping/unmapping buffers by checking for the pio_only flag. Signed-off-by: Joel Fernandes --- drivers/crypto/omap-aes.c | 43 ++++++++++++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 891455b..54f2729 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -175,6 +175,7 @@ struct omap_aes_dev { struct dma_chan *dma_lch_out; int in_sg_len; int out_sg_len; + int pio_only; const struct omap_aes_pdata *pdata; }; @@ -423,6 +424,16 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm, struct dma_slave_config cfg; int ret; + if (dd->pio_only) { + scatterwalk_start(&dd->in_walk, dd->in_sg); + scatterwalk_start(&dd->out_walk, dd->out_sg); + + /* Enable DATAIN interrupt and let it take + care of the rest */ + omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); + return 0; + } + dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); memset(&cfg, 0, sizeof(cfg)); @@ -492,21 +503,25 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) pr_debug("total: %d\n", dd->total); - err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); - if (!err) { - dev_err(dd->dev, "dma_map_sg() error\n"); - return -EINVAL; - } + if (!dd->pio_only) { + err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, + DMA_TO_DEVICE); + if (!err) { + dev_err(dd->dev, "dma_map_sg() error\n"); + return -EINVAL; + } - err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE); - if (!err) { - dev_err(dd->dev, "dma_map_sg() error\n"); - return -EINVAL; + err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); + if (!err) { + dev_err(dd->dev, "dma_map_sg() error\n"); + return -EINVAL; + } } err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, dd->out_sg_len); - if (err) { + if (err && !dd->pio_only) { dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE); @@ -610,9 +625,11 @@ static void omap_aes_done_task(unsigned long data) pr_debug("enter done_task\n"); - dma_sync_sg_for_cpu(dd->dev, dd->in_sg, dd->in_sg_len, DMA_FROM_DEVICE); - - omap_aes_crypt_dma_stop(dd); + if (!dd->pio_only) { + dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); + omap_aes_crypt_dma_stop(dd); + } omap_aes_finish_req(dd, 0); omap_aes_handle_queue(dd, NULL);