In axidma alloc_chan_resources merge BD and cyclic BD allocation.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
---
Changes for v2:
None
---
drivers/dma/xilinx/xilinx_dma.c | 36 ++++++++++++++++++------------------
1 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index c124423..06d1632 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -887,6 +887,24 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
chan->id);
return -ENOMEM;
}
+ /*
+ * For cyclic DMA mode we need to program the tail Descriptor
+ * register with a value which is not a part of the BD chain
+ * so allocating a desc segment during channel allocation for
+ * programming tail descriptor.
+ */
+ chan->cyclic_seg_v = dma_zalloc_coherent(chan->dev,
+ sizeof(*chan->cyclic_seg_v),
+ &chan->cyclic_seg_p, GFP_KERNEL);
+ if (!chan->cyclic_seg_v) {
+ dev_err(chan->dev,
+ "unable to allocate desc segment for cyclic DMA\n");
+ dma_free_coherent(chan->dev, sizeof(*chan->seg_v) *
+ XILINX_DMA_NUM_DESCS, chan->seg_v,
+ chan->seg_p);
+ return -ENOMEM;
+ }
+ chan->cyclic_seg_v->phys = chan->cyclic_seg_p;
for (i = 0; i < XILINX_DMA_NUM_DESCS; i++) {
chan->seg_v[i].hw.next_desc =
@@ -922,24 +940,6 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
return -ENOMEM;
}
- if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
- /*
- * For cyclic DMA mode we need to program the tail Descriptor
- * register with a value which is not a part of the BD chain
- * so allocating a desc segment during channel allocation for
- * programming tail descriptor.
- */
- chan->cyclic_seg_v = dma_zalloc_coherent(chan->dev,
- sizeof(*chan->cyclic_seg_v),
- &chan->cyclic_seg_p, GFP_KERNEL);
- if (!chan->cyclic_seg_v) {
- dev_err(chan->dev,
- "unable to allocate desc segment for cyclic DMA\n");
- return -ENOMEM;
- }
- chan->cyclic_seg_v->phys = chan->cyclic_seg_p;
- }
-
dma_cookie_init(dchan);
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
--
1.7.1
