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From 7fa0cf462daa6f6121b332b87833d7f5bdb515c0 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@free-electrons.com>
Date: Mon, 17 Nov 2014 14:42:02 +0100
Subject: [PATCH] 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@free-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
include/linux/dmaengine.h | 6 ++++++
1 file changed, 6 insertions(+)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -611,6 +611,8 @@ struct dma_tx_state {
* code
* @device_control: manipulate all pending operations on a channel, returns
* zero or 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
@@ -680,6 +682,7 @@ struct dma_device {
struct dma_slave_config *config);
int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg);
+ int (*device_terminate_all)(struct dma_chan *chan);
enum dma_status (*device_tx_status)(struct dma_chan *chan,
dma_cookie_t cookie,
@@ -789,6 +792,9 @@ static inline int dma_get_slave_caps(str
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);
}
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