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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2014-10-29 00:30:58 +0200
committerVinod Koul <vinod.koul@intel.com>2015-01-18 19:55:57 +0530
commit0d5484b1c3db8a3870c6100deeb4678594433b2c (patch)
tree14209f1987ed0b61dd802c82508055a3fdf76004 /drivers/dma
parent816070ede77003e033c76cd1f72127d9bb6c9a03 (diff)
downloadop-kernel-dev-0d5484b1c3db8a3870c6100deeb4678594433b2c.zip
op-kernel-dev-0d5484b1c3db8a3870c6100deeb4678594433b2c.tar.gz
dmaengine: Move dma_get_slave_caps() implementation to dmaengine.c
The function is too big to be a static inline. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dmaengine.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 30211f9..f15712f 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -479,6 +479,39 @@ static void dma_channel_rebalance(void)
}
}
+int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps)
+{
+ struct dma_device *device;
+
+ if (!chan || !caps)
+ return -EINVAL;
+
+ device = chan->device;
+
+ /* check if the channel supports slave transactions */
+ if (!test_bit(DMA_SLAVE, device->cap_mask.bits))
+ return -ENXIO;
+
+ /*
+ * Check whether it reports it uses the generic slave
+ * capabilities, if not, that means it doesn't support any
+ * kind of slave capabilities reporting.
+ */
+ if (!device->directions)
+ return -ENXIO;
+
+ caps->src_addr_widths = device->src_addr_widths;
+ caps->dst_addr_widths = device->dst_addr_widths;
+ caps->directions = device->directions;
+ caps->residue_granularity = device->residue_granularity;
+
+ caps->cmd_pause = !!device->device_pause;
+ caps->cmd_terminate = !!device->device_terminate_all;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dma_get_slave_caps);
+
static struct dma_chan *private_candidate(const dma_cap_mask_t *mask,
struct dma_device *dev,
dma_filter_fn fn, void *fn_param)
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