[PATCH v2 3/4] dmaengine: xilinx_dma: Introduce helper macro for preparing dma address
From: Appana Durga Kedareswara Rao <hidden>
Date: 2018-10-19 10:37:18
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dmaengine, lkml
Hi, Thanks for the patch...
This patch introduces the xilinx_prep_dma_addr_t macro which prepares dma_addr_t from hardware buffer descriptor LSB and MSB fields. It will be used in simple dma 64-bit programming sequence. Signed-off-by: Radhey Shyam Pandey <redacted>
Reviewed-by: Appana Durga Kedareswara Rao <appana.durga.rao@xilinx.com> Regards, Kedar.
quoted hunk ↗ jump to hunk
--- Changes for v2: New patch- Preparatory change for 4/4 fix. --- drivers/dma/xilinx/xilinx_dma.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index a37871e..c27ab64 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c@@ -190,6 +190,8 @@ /* AXI CDMA Specific Masks */ #define XILINX_CDMA_CR_SGMODE BIT(3) +#define xilinx_prep_dma_addr_t(addr) \ + ((dma_addr_t)((u64)addr##_##msb << 32 | (addr))) /** * struct xilinx_vdma_desc_hw - Hardware Descriptor * @next_desc: Next Descriptor Pointer @0x00 --1.7.1