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DMAENGINE: generic channel status v2

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Convert the device_is_tx_complete() operation on the
DMA engine to a generic device_tx_status()operation which
can return three states, DMA_TX_RUNNING, DMA_TX_COMPLETE,
DMA_TX_PAUSED.

[dan.j.williams@intel.com: update for timberdale]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Li Yang <leoli@freescale.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Magnus Damm <damm@opensource.se>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Joe Perches <joe@perches.com>
Cc: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Linus Walleij
2010-03-26 16:50:49 -07:00
committed by Dan Williams
parent c3635c78e5
commit 0793448187
19 changed files with 203 additions and 172 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/dma/mpc512x_dma.c
+8 -8
View File
@@ -540,8 +540,8 @@ static void mpc_dma_issue_pending(struct dma_chan *chan)
/* Check request completion status */
static enum dma_status
mpc_dma_is_tx_complete(struct dma_chan *chan, dma_cookie_t cookie,
dma_cookie_t *done, dma_cookie_t *used)
mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
unsigned long flags;
@@ -553,11 +553,11 @@ mpc_dma_is_tx_complete(struct dma_chan *chan, dma_cookie_t cookie,
last_complete = mchan->completed_cookie;
spin_unlock_irqrestore(&mchan->lock, flags);
if (done)
*done = last_complete;
if (used)
*used = last_used;
if (txstate) {
txstate->last = last_complete;
txstate->used = last_used;
txstate->residue = 0;
}
return dma_async_is_complete(cookie, last_complete, last_used);
}
@@ -693,7 +693,7 @@ static int __devinit mpc_dma_probe(struct of_device *op,
dma->device_alloc_chan_resources = mpc_dma_alloc_chan_resources;
dma->device_free_chan_resources = mpc_dma_free_chan_resources;
dma->device_issue_pending = mpc_dma_issue_pending;
dma->device_is_tx_complete = mpc_dma_is_tx_complete;
dma->device_tx_status = mpc_dma_tx_status;
dma->device_prep_dma_memcpy = mpc_dma_prep_memcpy;
INIT_LIST_HEAD(&dma->channels);