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dmaengine: move last completed cookie into generic dma_chan structure

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Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures.  This is pointless, and
forces driver specific code.  Move this out into the common dma_chan
structure.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Russell King - ARM Linux
2012-03-06 22:34:06 +00:00
committed by Vinod Koul
parent 08714f60b0
commit 4d4e58de32
37 changed files with 83 additions and 119 deletions
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8
drivers/dma/ep93xx_dma.c
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@@ -122,7 +122,6 @@ struct ep93xx_dma_desc {
* @lock: lock protecting the fields following
* @flags: flags for the channel
* @buffer: which buffer to use next (0/1)
* @last_completed: last completed cookie value
* @active: flattened chain of descriptors currently being processed
* @queue: pending descriptors which are handled next
* @free_list: list of free descriptors which can be used
@@ -157,7 +156,6 @@ struct ep93xx_dma_chan {
#define EP93XX_DMA_IS_CYCLIC 0
int buffer;
dma_cookie_t last_completed;
struct list_head active;
struct list_head queue;
struct list_head free_list;
@@ -703,7 +701,7 @@ static void ep93xx_dma_tasklet(unsigned long data)
desc = ep93xx_dma_get_active(edmac);
if (desc) {
if (desc->complete) {
edmac->last_completed = desc->txd.cookie;
edmac->chan.completed_cookie = desc->txd.cookie;
list_splice_init(&edmac->active, &list);
}
callback = desc->txd.callback;
@@ -861,7 +859,7 @@ static int ep93xx_dma_alloc_chan_resources(struct dma_chan *chan)
goto fail_clk_disable;
spin_lock_irq(&edmac->lock);
edmac->last_completed = 1;
edmac->chan.completed_cookie = 1;
edmac->chan.cookie = 1;
ret = edmac->edma->hw_setup(edmac);
spin_unlock_irq(&edmac->lock);
@@ -1254,7 +1252,7 @@ static enum dma_status ep93xx_dma_tx_status(struct dma_chan *chan,
spin_lock_irqsave(&edmac->lock, flags);
last_used = chan->cookie;
last_completed = edmac->last_completed;
last_completed = chan->completed_cookie;
spin_unlock_irqrestore(&edmac->lock, flags);
ret = dma_async_is_complete(cookie, last_completed, last_used);