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authorLinus Walleij <linus.walleij@stericsson.com>2010-03-26 16:50:49 -0700
committerDan Williams <dan.j.williams@intel.com>2010-03-26 16:50:49 -0700
commit0793448187643b50af89d36b08470baf45a3cab4 (patch)
treeb3313ff58d47e26a8cf707d196177effa1aadfbe /drivers/dma/ppc4xx
parentc3635c78e500a52c9fcd55de381a72928d9e054d (diff)
downloadop-kernel-dev-0793448187643b50af89d36b08470baf45a3cab4.zip
op-kernel-dev-0793448187643b50af89d36b08470baf45a3cab4.tar.gz
DMAENGINE: generic channel status v2
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>
Diffstat (limited to 'drivers/dma/ppc4xx')
-rw-r--r--drivers/dma/ppc4xx/adma.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index e69d87f..d9a54c0 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -3934,12 +3934,13 @@ static void ppc440spe_adma_free_chan_resources(struct dma_chan *chan)
}
/**
- * ppc440spe_adma_is_complete - poll the status of an ADMA transaction
+ * ppc440spe_adma_tx_status - poll the status of an ADMA transaction
* @chan: ADMA channel handle
* @cookie: ADMA transaction identifier
+ * @txstate: a holder for the current state of the channel
*/
-static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
- dma_cookie_t cookie, dma_cookie_t *done, dma_cookie_t *used)
+static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct ppc440spe_adma_chan *ppc440spe_chan;
dma_cookie_t last_used;
@@ -3950,10 +3951,11 @@ static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = ppc440spe_chan->completed_cookie;
- if (done)
- *done = last_complete;
- if (used)
- *used = last_used;
+ if (txstate) {
+ txstate->last = last_complete;
+ txstate->used = last_used;
+ txstate->residue = 0;
+ }
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret == DMA_SUCCESS)
@@ -3964,10 +3966,11 @@ static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = ppc440spe_chan->completed_cookie;
- 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);
}
@@ -4179,7 +4182,7 @@ static void ppc440spe_adma_init_capabilities(struct ppc440spe_adma_device *adev)
ppc440spe_adma_alloc_chan_resources;
adev->common.device_free_chan_resources =
ppc440spe_adma_free_chan_resources;
- adev->common.device_is_tx_complete = ppc440spe_adma_is_complete;
+ adev->common.device_tx_status = ppc440spe_adma_tx_status;
adev->common.device_issue_pending = ppc440spe_adma_issue_pending;
/* Set prep routines based on capability */
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