diff options
| author | Robert Jarzmik <robert.jarzmik@free.fr> | 2015-10-13 21:54:29 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-11-16 04:02:16 +0100 |
| commit | 9eeacd3a2f17438d9d286ff2f78c4709a4148be7 (patch) | |
| tree | d602de8c0011d281ebaa138a6eecfc88f1e6d1d7 | |
| parent | dmaengine: virt-dma: don't always free descriptor upon completion (diff) | |
| download | linux-9eeacd3a2f17438d9d286ff2f78c4709a4148be7.tar.xz linux-9eeacd3a2f17438d9d286ff2f78c4709a4148be7.zip | |
dmaengine: enable DMA_CTRL_REUSE
In the current state, the capability of transfer reuse can neither be
set by a slave dmaengine driver, nor used by a client driver, because
the capability is not available to dma_get_slave_caps().
Fix this by adding a way to declare the capability.
Fixes: 272420214d26 ("dmaengine: Add DMA_CTRL_REUSE")
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/dmaengine.c | 1 | ||||
| -rw-r--r-- | include/linux/dmaengine.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 3ecec1445adf..4aced6689734 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -493,6 +493,7 @@ int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps) caps->dst_addr_widths = device->dst_addr_widths; caps->directions = device->directions; caps->residue_granularity = device->residue_granularity; + caps->descriptor_reuse = device->descriptor_reuse; /* * Some devices implement only pause (e.g. to get residuum) but no diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index c47c68e535e8..6f94b5cbd97c 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -659,6 +659,7 @@ enum dmaengine_alignment { * struct with auxiliary transfer status information, otherwise the call * will just return a simple status code * @device_issue_pending: push pending transactions to hardware + * @descriptor_reuse: a submitted transfer can be resubmitted after completion */ struct dma_device { @@ -681,6 +682,7 @@ struct dma_device { u32 src_addr_widths; u32 dst_addr_widths; u32 directions; + bool descriptor_reuse; enum dma_residue_granularity residue_granularity; int (*device_alloc_chan_resources)(struct dma_chan *chan); |