diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2008-04-17 20:17:26 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2008-04-17 13:25:54 -0700 |
| commit | 636bdeaa1243327501edfd2a597ed7443eb4239a (patch) | |
| tree | 59b894f124e3664ea4a537d7c07c527abdb9c8da /drivers/dma/fsldma.c | |
| parent | c4fe15541d0ef5cc8cc1ce43057663851f8fc387 (diff) | |
| download | linux-636bdeaa1243327501edfd2a597ed7443eb4239a.tar.gz linux-636bdeaa1243327501edfd2a597ed7443eb4239a.tar.bz2 linux-636bdeaa1243327501edfd2a597ed7443eb4239a.zip | |
dmaengine: ack to flags: make use of the unused bits in the 'ack' field
'ack' is currently a simple integer that flags whether or not a client is done
touching fields in the given descriptor. It is effectively just a single bit
of information. Converting this to a flags parameter allows the other bits to
be put to use to control completion actions, like dma-unmap, and capture
results, like xor-zero-sum == 0.
Changes are one of:
1/ convert all open-coded ->ack manipulations to use async_tx_ack
and async_tx_test_ack.
2/ set the ack bit at prep time where possible
3/ make drivers store the flags at prep time
4/ add flags to the device_prep_dma_interrupt prototype
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/fsldma.c')
| -rw-r--r-- | drivers/dma/fsldma.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 95b36b7934a5..054eabffc185 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -412,7 +412,7 @@ static void fsl_dma_free_chan_resources(struct dma_chan *chan) } static struct dma_async_tx_descriptor * -fsl_dma_prep_interrupt(struct dma_chan *chan) +fsl_dma_prep_interrupt(struct dma_chan *chan, unsigned long flags) { struct fsl_dma_chan *fsl_chan; struct fsl_desc_sw *new; @@ -429,7 +429,7 @@ fsl_dma_prep_interrupt(struct dma_chan *chan) } new->async_tx.cookie = -EBUSY; - new->async_tx.ack = 0; + new->async_tx.flags = flags; /* Insert the link descriptor to the LD ring */ list_add_tail(&new->node, &new->async_tx.tx_list); @@ -482,7 +482,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( set_desc_next(fsl_chan, &prev->hw, new->async_tx.phys); new->async_tx.cookie = 0; - new->async_tx.ack = 1; + async_tx_ack(&new->async_tx); prev = new; len -= copy; @@ -493,7 +493,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( list_add_tail(&new->node, &first->async_tx.tx_list); } while (len); - new->async_tx.ack = 0; /* client is in control of this ack */ + new->async_tx.flags = flags; /* client is in control of this ack */ new->async_tx.cookie = -EBUSY; /* Set End-of-link to the last link descriptor of new list*/ @@ -874,7 +874,7 @@ static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan) async_tx_ack(tx3); /* Interrupt tx test */ - tx1 = fsl_dma_prep_interrupt(chan); + tx1 = fsl_dma_prep_interrupt(chan, 0); async_tx_ack(tx1); cookie = fsl_dma_tx_submit(tx1); |