From patchwork Wed Oct 22 15:43:39 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 5134821 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D99C0C11AC for ; Wed, 22 Oct 2014 16:04:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E77A220121 for ; Wed, 22 Oct 2014 16:04:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D637D201F5 for ; Wed, 22 Oct 2014 16:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754657AbaJVPpf (ORCPT ); Wed, 22 Oct 2014 11:45:35 -0400 Received: from down.free-electrons.com ([37.187.137.238]:54065 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754620AbaJVPpd (ORCPT ); Wed, 22 Oct 2014 11:45:33 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 34963500D; Wed, 22 Oct 2014 17:45:32 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 68536500A; Wed, 22 Oct 2014 17:45:31 +0200 (CEST) From: Maxime Ripard To: dmaengine@vger.kernel.org, Vinod Koul Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Laurent Pinchart , =?UTF-8?q?Antoine=20T=C3=A9nart?= , lars@metafoo.de, Russell King , Maxime Ripard , Dan Williams Subject: [PATCH v3 25/59] dmaengine: ipu-idmac: Split device_control Date: Wed, 22 Oct 2014 17:43:39 +0200 Message-Id: <1413992653-21963-26-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1413992653-21963-1-git-send-email-maxime.ripard@free-electrons.com> References: <1413992653-21963-1-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 IPU IDMAC 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/ipu/ipu_idmac.c | 96 ++++++++++++++++++++++++--------------------- 1 file changed, 51 insertions(+), 45 deletions(-) diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c index bbf62927bd72..b36f5a47578a 100644 --- a/drivers/dma/ipu/ipu_idmac.c +++ b/drivers/dma/ipu/ipu_idmac.c @@ -1398,76 +1398,81 @@ static void idmac_issue_pending(struct dma_chan *chan) */ } -static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int idmac_pause(struct dma_chan *chan) { struct idmac_channel *ichan = to_idmac_chan(chan); struct idmac *idmac = to_idmac(chan->device); struct ipu *ipu = to_ipu(idmac); struct list_head *list, *tmp; unsigned long flags; - int i; - switch (cmd) { - case DMA_PAUSE: - spin_lock_irqsave(&ipu->lock, flags); - ipu_ic_disable_task(ipu, chan->chan_id); + mutex_lock(&ichan->chan_mutex); - /* Return all descriptors into "prepared" state */ - list_for_each_safe(list, tmp, &ichan->queue) - list_del_init(list); + spin_lock_irqsave(&ipu->lock, flags); + ipu_ic_disable_task(ipu, chan->chan_id); - ichan->sg[0] = NULL; - ichan->sg[1] = NULL; + /* Return all descriptors into "prepared" state */ + list_for_each_safe(list, tmp, &ichan->queue) + list_del_init(list); - spin_unlock_irqrestore(&ipu->lock, flags); + ichan->sg[0] = NULL; + ichan->sg[1] = NULL; - ichan->status = IPU_CHANNEL_INITIALIZED; - break; - case DMA_TERMINATE_ALL: - ipu_disable_channel(idmac, ichan, - ichan->status >= IPU_CHANNEL_ENABLED); + spin_unlock_irqrestore(&ipu->lock, flags); - tasklet_disable(&ipu->tasklet); + ichan->status = IPU_CHANNEL_INITIALIZED; - /* ichan->queue is modified in ISR, have to spinlock */ - spin_lock_irqsave(&ichan->lock, flags); - list_splice_init(&ichan->queue, &ichan->free_list); + mutex_unlock(&ichan->chan_mutex); - if (ichan->desc) - for (i = 0; i < ichan->n_tx_desc; i++) { - struct idmac_tx_desc *desc = ichan->desc + i; - if (list_empty(&desc->list)) - /* Descriptor was prepared, but not submitted */ - list_add(&desc->list, &ichan->free_list); + return 0; +} - async_tx_clear_ack(&desc->txd); - } +static int __idmac_terminate_all(struct dma_chan *chan) +{ + struct idmac_channel *ichan = to_idmac_chan(chan); + struct idmac *idmac = to_idmac(chan->device); + struct ipu *ipu = to_ipu(idmac); + unsigned long flags; + int i; - ichan->sg[0] = NULL; - ichan->sg[1] = NULL; - spin_unlock_irqrestore(&ichan->lock, flags); + ipu_disable_channel(idmac, ichan, + ichan->status >= IPU_CHANNEL_ENABLED); - tasklet_enable(&ipu->tasklet); + tasklet_disable(&ipu->tasklet); - ichan->status = IPU_CHANNEL_INITIALIZED; - break; - default: - return -ENOSYS; - } + /* ichan->queue is modified in ISR, have to spinlock */ + spin_lock_irqsave(&ichan->lock, flags); + list_splice_init(&ichan->queue, &ichan->free_list); + + if (ichan->desc) + for (i = 0; i < ichan->n_tx_desc; i++) { + struct idmac_tx_desc *desc = ichan->desc + i; + if (list_empty(&desc->list)) + /* Descriptor was prepared, but not submitted */ + list_add(&desc->list, &ichan->free_list); + + async_tx_clear_ack(&desc->txd); + } + + ichan->sg[0] = NULL; + ichan->sg[1] = NULL; + spin_unlock_irqrestore(&ichan->lock, flags); + + tasklet_enable(&ipu->tasklet); + + ichan->status = IPU_CHANNEL_INITIALIZED; return 0; } -static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int idmac_terminate_all(struct dma_chan *chan) { struct idmac_channel *ichan = to_idmac_chan(chan); int ret; mutex_lock(&ichan->chan_mutex); - ret = __idmac_control(chan, cmd, arg); + ret = __idmac_terminate_all(chan); mutex_unlock(&ichan->chan_mutex); @@ -1568,7 +1573,7 @@ static void idmac_free_chan_resources(struct dma_chan *chan) mutex_lock(&ichan->chan_mutex); - __idmac_control(chan, DMA_TERMINATE_ALL, 0); + __idmac_terminate_all(chan); if (ichan->status > IPU_CHANNEL_FREE) { #ifdef DEBUG @@ -1622,7 +1627,8 @@ static int __init ipu_idmac_init(struct ipu *ipu) /* Compulsory for DMA_SLAVE fields */ dma->device_prep_slave_sg = idmac_prep_slave_sg; - dma->device_control = idmac_control; + dma->device_pause = idmac_pause; + dma->device_terminate_all = idmac_terminate_all; INIT_LIST_HEAD(&dma->channels); for (i = 0; i < IPU_CHANNELS_NUM; i++) { @@ -1655,7 +1661,7 @@ static void ipu_idmac_exit(struct ipu *ipu) for (i = 0; i < IPU_CHANNELS_NUM; i++) { struct idmac_channel *ichan = ipu->channel + i; - idmac_control(&ichan->dma_chan, DMA_TERMINATE_ALL, 0); + idmac_terminate_all(&ichan->dma_chan); } dma_async_device_unregister(&idmac->dma);