There is no point in allocating an additional memory for the data target
regions passed then to the client drivers. Just use the already available
structures defined in the dw_edma_chip instance.
Note these regions are unused in normal circumstances since they are
specific to the case of eDMA being embedded into the DW PCIe End-point and
having it's CSRs accessible over a End-point' BAR. This case is only known
to be implemented as a part of the Synopsys PCIe EndPoint IP prototype
kit.
Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
drivers/dma/dw-edma/dw-edma-core.c | 21 ++++-----------------
1 file changed, 4 insertions(+), 17 deletions(-)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 7ba3b60c960c..98a94a66fb82 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -744,7 +744,6 @@ static void dw_edma_free_chan_resources(struct dma_chan *dchan)
static int dw_edma_channel_setup(struct dw_edma *dw, u32 wr_alloc, u32 rd_alloc)
{
struct dw_edma_chip *chip = dw->chip;
- struct dw_edma_region *dt_region;
struct device *dev = chip->dev;
struct dw_edma_chan *chan;
struct dw_edma_irq *irq;
@@ -760,12 +759,6 @@ static int dw_edma_channel_setup(struct dw_edma *dw, u32 wr_alloc, u32 rd_alloc)
for (i = 0; i < ch_cnt; i++) {
chan = &dw->chan[i];
- dt_region = devm_kzalloc(dev, sizeof(*dt_region), GFP_KERNEL);
- if (!dt_region)
- return -ENOMEM;
-
- chan->vc.chan.private = dt_region;
-
chan->dw = dw;
if (i < dw->wr_ch_cnt) {
@@ -813,17 +806,11 @@ static int dw_edma_channel_setup(struct dw_edma *dw, u32 wr_alloc, u32 rd_alloc)
chan->msi.data);
chan->vc.desc_free = vchan_free_desc;
- vchan_init(&chan->vc, dma);
+ chan->vc.chan.private = chan->dir == EDMA_DIR_WRITE ?
+ &dw->chip->dt_region_wr[chan->id] :
+ &dw->chip->dt_region_rd[chan->id];
- if (chan->dir == EDMA_DIR_WRITE) {
- dt_region->paddr = chip->dt_region_wr[chan->id].paddr;
- dt_region->vaddr = chip->dt_region_wr[chan->id].vaddr;
- dt_region->sz = chip->dt_region_wr[chan->id].sz;
- } else {
- dt_region->paddr = chip->dt_region_rd[chan->id].paddr;
- dt_region->vaddr = chip->dt_region_rd[chan->id].vaddr;
- dt_region->sz = chip->dt_region_rd[chan->id].sz;
- }
+ vchan_init(&chan->vc, dma);
dw_edma_v0_core_device_config(chan);
}
--
2.35.1
