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-rw-r--r--arch/riscv/include/asm/dma-mapping.h23
1 files changed, 21 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h
index 3d930c90ec..6cc3946959 100644
--- a/arch/riscv/include/asm/dma-mapping.h
+++ b/arch/riscv/include/asm/dma-mapping.h
@@ -9,7 +9,11 @@
#ifndef __ASM_RISCV_DMA_MAPPING_H
#define __ASM_RISCV_DMA_MAPPING_H
+#include <common.h>
+#include <asm/cache.h>
+#include <cpu_func.h>
#include <linux/dma-direction.h>
+#include <malloc.h>
#define dma_mapping_error(x, y) 0
@@ -27,12 +31,27 @@ static inline void dma_free_coherent(void *addr)
static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
enum dma_data_direction dir)
{
- return (unsigned long)vaddr;
+ unsigned long addr = (unsigned long)vaddr;
+
+ len = ALIGN(len, ARCH_DMA_MINALIGN);
+
+ if (dir == DMA_FROM_DEVICE)
+ invalidate_dcache_range(addr, addr + len);
+ else
+ flush_dcache_range(addr, addr + len);
+
+ return addr;
}
static inline void dma_unmap_single(volatile void *vaddr, size_t len,
- unsigned long paddr)
+ enum dma_data_direction dir)
{
+ unsigned long addr = (unsigned long)vaddr;
+
+ len = ALIGN(len, ARCH_DMA_MINALIGN);
+
+ if (dir != DMA_TO_DEVICE)
+ invalidate_dcache_range(addr, addr + len);
}
#endif /* __ASM_RISCV_DMA_MAPPING_H */