From patchwork Mon May 16 08:37:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 9099061 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BE2619F1D3 for ; Mon, 16 May 2016 08:39:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F1C3320279 for ; Mon, 16 May 2016 08:39:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D68B420274 for ; Mon, 16 May 2016 08:39:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753642AbcEPIiJ (ORCPT ); Mon, 16 May 2016 04:38:09 -0400 Received: from relay1.mentorg.com ([192.94.38.131]:33317 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753618AbcEPIiH (ORCPT ); Mon, 16 May 2016 04:38:07 -0400 Received: from svr-orw-fem-04.mgc.mentorg.com ([147.34.97.41]) by relay1.mentorg.com with esmtp id 1b2E2Q-00022C-JD from Jiada_Wang@mentor.com ; Mon, 16 May 2016 01:38:06 -0700 Received: from jiwang-OptiPlex-980.tokyo.mentorg.com (147.34.91.1) by svr-orw-fem-04.mgc.mentorg.com (147.34.97.41) with Microsoft SMTP Server id 14.3.224.2; Mon, 16 May 2016 01:38:06 -0700 From: Jiada Wang To: , CC: , , , Subject: [PATCH 07/10] dma: imx-sdma: Add synchronization support Date: Mon, 16 May 2016 17:37:55 +0900 Message-ID: <1463387878-7643-8-git-send-email-jiada_wang@mentor.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1463387878-7643-1-git-send-email-jiada_wang@mentor.com> References: <1463387878-7643-1-git-send-email-jiada_wang@mentor.com> MIME-Version: 1.0 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Implement the new device_synchronize() callback to allow proper synchronization when stopping a channel. Since the driver already makes sure that no new complete callbacks are scheduled after the device_terminate_all() has been called, all left to do in the device_synchronize() callback is to wait for all currently running complete callbacks to finish. Signed-off-by: Jiada Wang --- drivers/dma/imx-sdma.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 040cbf2..0b23407 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1408,6 +1408,13 @@ static int sdma_terminate_all(struct dma_chan *chan) return 0; } +static void sdma_synchronize(struct dma_chan *chan) +{ + struct sdma_channel *sdmac = to_sdma_chan(chan); + + tasklet_kill(&sdmac->tasklet); +} + #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 41 @@ -1827,6 +1834,7 @@ static int sdma_probe(struct platform_device *pdev) sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; sdma->dma_device.device_issue_pending = sdma_issue_pending; sdma->dma_device.device_terminate_all = sdma_terminate_all; + sdma->dma_device.device_synchronize = sdma_synchronize; sdma->dma_device.dev->dma_parms = &sdma->dma_parms; dma_set_max_seg_size(sdma->dma_device.dev, 65535);