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48 lines
1.8 KiB
48 lines
1.8 KiB
9 years ago
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From 7fa0cf462daa6f6121b332b87833d7f5bdb515c0 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime.ripard@free-electrons.com>
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Date: Mon, 17 Nov 2014 14:42:02 +0100
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Subject: [PATCH] dmaengine: Add device_terminate_all callback
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Split out the terminate_all command from device_control to a dma_device
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callback. In order to preserve backward capability, still rely on
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device_control if no such callback has been implemented.
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Eventually, this will allow to create a generic dma_slave_caps callback.
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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---
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include/linux/dmaengine.h | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/include/linux/dmaengine.h
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+++ b/include/linux/dmaengine.h
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@@ -611,6 +611,8 @@ struct dma_tx_state {
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* code
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* @device_control: manipulate all pending operations on a channel, returns
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* zero or error code
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+ * @device_terminate_all: Aborts all transfers on a channel. Returns 0
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+ * or an error code
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* @device_tx_status: poll for transaction completion, the optional
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* txstate parameter can be supplied with a pointer to get a
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* struct with auxiliary transfer status information, otherwise the call
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@@ -680,6 +682,7 @@ struct dma_device {
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struct dma_slave_config *config);
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int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
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unsigned long arg);
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+ int (*device_terminate_all)(struct dma_chan *chan);
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enum dma_status (*device_tx_status)(struct dma_chan *chan,
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dma_cookie_t cookie,
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@@ -789,6 +792,9 @@ static inline int dma_get_slave_caps(str
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static inline int dmaengine_terminate_all(struct dma_chan *chan)
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{
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+ if (chan->device->device_terminate_all)
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+ return chan->device->device_terminate_all(chan);
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+
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return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0);
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}
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