From patchwork Mon Nov 17 13:42:30 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 5320301 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 [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0ED259F1E1 for ; Mon, 17 Nov 2014 13:56:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1B3942010B for ; Mon, 17 Nov 2014 13:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2519C20103 for ; Mon, 17 Nov 2014 13:56:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752433AbaKQN4K (ORCPT ); Mon, 17 Nov 2014 08:56:10 -0500 Received: from down.free-electrons.com ([37.187.137.238]:49096 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753322AbaKQNpb (ORCPT ); Mon, 17 Nov 2014 08:45:31 -0500 Received: by mail.free-electrons.com (Postfix, from userid 106) id 27D5B779; Mon, 17 Nov 2014 14:45:37 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id BE3E1772; Mon, 17 Nov 2014 14:45:36 +0100 (CET) From: Maxime Ripard To: Vinod Koul , dmaengine@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Laurent Pinchart , =?UTF-8?q?Antoine=20T=C3=A9nart?= , Russell King , lars@metafoo.de, Maxime Ripard Subject: [PATCH v5 36/61] dmaengine: bam-dma: Split device_control Date: Mon, 17 Nov 2014 14:42:30 +0100 Message-Id: <1416231775-31252-37-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1416231775-31252-1-git-send-email-maxime.ripard@free-electrons.com> References: <1416231775-31252-1-git-send-email-maxime.ripard@free-electrons.com> Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Split the device_control callback of the Qualcomm BAM DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard --- drivers/dma/qcom_bam_dma.c | 85 +++++++++++++++++++++++----------------------- 1 file changed, 43 insertions(+), 42 deletions(-) diff --git a/drivers/dma/qcom_bam_dma.c b/drivers/dma/qcom_bam_dma.c index 3122a99ec06b..d7a33b3ac466 100644 --- a/drivers/dma/qcom_bam_dma.c +++ b/drivers/dma/qcom_bam_dma.c @@ -530,11 +530,18 @@ static void bam_free_chan(struct dma_chan *chan) * Sets slave configuration for channel * */ -static void bam_slave_config(struct bam_chan *bchan, - struct dma_slave_config *cfg) +static int bam_slave_config(struct dma_chan *chan, + struct dma_slave_config *cfg) { + struct bam_chan *bchan = to_bam_chan(chan); + unsigned long flag; + + spin_lock_irqsave(&bchan->vc.lock, flag); memcpy(&bchan->slave, cfg, sizeof(*cfg)); bchan->reconfigure = 1; + spin_unlock_irqrestore(&bchan->vc.lock, flag); + + return 0; } /** @@ -627,8 +634,9 @@ err_out: * No callbacks are done * */ -static void bam_dma_terminate_all(struct bam_chan *bchan) +static int bam_dma_terminate_all(struct dma_chan *chan) { + struct bam_chan *bchan = to_bam_chan(chan); unsigned long flag; LIST_HEAD(head); @@ -643,56 +651,46 @@ static void bam_dma_terminate_all(struct bam_chan *bchan) spin_unlock_irqrestore(&bchan->vc.lock, flag); vchan_dma_desc_free_list(&bchan->vc, &head); + + return 0; } /** - * bam_control - DMA device control + * bam_pause - Pause DMA channel * @chan: dma channel - * @cmd: control cmd - * @arg: cmd argument * - * Perform DMA control command + */ +static int bam_pause(struct dma_chan *chan) +{ + struct bam_chan *bchan = to_bam_chan(chan); + struct bam_device *bdev = bchan->bdev; + unsigned long flag; + + spin_lock_irqsave(&bchan->vc.lock, flag); + writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_HALT)); + bchan->paused = 1; + spin_unlock_irqrestore(&bchan->vc.lock, flag); + + return 0; +} + +/** + * bam_resume - Resume DMA channel operations + * @chan: dma channel * */ -static int bam_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int bam_resume(struct dma_chan *chan) { struct bam_chan *bchan = to_bam_chan(chan); struct bam_device *bdev = bchan->bdev; - int ret = 0; unsigned long flag; - switch (cmd) { - case DMA_PAUSE: - spin_lock_irqsave(&bchan->vc.lock, flag); - writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_HALT)); - bchan->paused = 1; - spin_unlock_irqrestore(&bchan->vc.lock, flag); - break; - - case DMA_RESUME: - spin_lock_irqsave(&bchan->vc.lock, flag); - writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_HALT)); - bchan->paused = 0; - spin_unlock_irqrestore(&bchan->vc.lock, flag); - break; - - case DMA_TERMINATE_ALL: - bam_dma_terminate_all(bchan); - break; - - case DMA_SLAVE_CONFIG: - spin_lock_irqsave(&bchan->vc.lock, flag); - bam_slave_config(bchan, (struct dma_slave_config *)arg); - spin_unlock_irqrestore(&bchan->vc.lock, flag); - break; - - default: - ret = -ENXIO; - break; - } + spin_lock_irqsave(&bchan->vc.lock, flag); + writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_HALT)); + bchan->paused = 0; + spin_unlock_irqrestore(&bchan->vc.lock, flag); - return ret; + return 0; } /** @@ -1148,7 +1146,10 @@ static int bam_dma_probe(struct platform_device *pdev) bdev->common.device_alloc_chan_resources = bam_alloc_chan; bdev->common.device_free_chan_resources = bam_free_chan; bdev->common.device_prep_slave_sg = bam_prep_slave_sg; - bdev->common.device_control = bam_control; + bdev->common.device_config = bam_slave_config; + bdev->common.device_pause = bam_pause; + bdev->common.device_resume = bam_resume; + bdev->common.device_terminate_all = bam_dma_terminate_all; bdev->common.device_issue_pending = bam_issue_pending; bdev->common.device_tx_status = bam_tx_status; bdev->common.dev = bdev->dev; @@ -1187,7 +1188,7 @@ static int bam_dma_remove(struct platform_device *pdev) devm_free_irq(bdev->dev, bdev->irq, bdev); for (i = 0; i < bdev->num_channels; i++) { - bam_dma_terminate_all(&bdev->channels[i]); + bam_dma_terminate_all(&bdev->channels[i].vc.chan); tasklet_kill(&bdev->channels[i].vc.task); dma_free_writecombine(bdev->dev, BAM_DESC_FIFO_SIZE,