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Message-Id: <1416231775-31252-9-git-send-email-maxime.ripard@free-electrons.com>
Date: Mon, 17 Nov 2014 14:42:02 +0100
From: Maxime Ripard <maxime.ripard@...e-electrons.com>
To: Vinod Koul <vinod.koul@...el.com>, dmaengine@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Antoine Ténart <antoine@...e-electrons.com>,
Russell King <linux@....linux.org.uk>, lars@...afoo.de,
Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH v5 08/61] dmaengine: Add device_terminate_all callback
Split out the terminate_all command from device_control to a dma_device
callback. In order to preserve backward capability, still rely on
device_control if no such callback has been implemented.
Eventually, this will allow to create a generic dma_slave_caps callback.
Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
include/linux/dmaengine.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 4583c55f3355..b0efc805937a 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -615,6 +615,8 @@ struct dma_tx_state {
* 0 or an error code
* @device_resume: Resumes any transfer on a channel previously
* paused. Returns 0 or an error code
+ * @device_terminate_all: Aborts all transfers on a channel. Returns 0
+ * or an error code
* @device_tx_status: poll for transaction completion, the optional
* txstate parameter can be supplied with a pointer to get a
* struct with auxiliary transfer status information, otherwise the call
@@ -686,6 +688,7 @@ struct dma_device {
unsigned long arg);
int (*device_pause)(struct dma_chan *chan);
int (*device_resume)(struct dma_chan *chan);
+ int (*device_terminate_all)(struct dma_chan *chan);
enum dma_status (*device_tx_status)(struct dma_chan *chan,
dma_cookie_t cookie,
@@ -795,6 +798,9 @@ static inline int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_cap
static inline int dmaengine_terminate_all(struct dma_chan *chan)
{
+ if (chan->device->device_terminate_all)
+ return chan->device->device_terminate_all(chan);
+
return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0);
}
--
2.1.1
--
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