dma: move dma_map/unmap_single from ARM to common code

There's nothing ARM specific about these functions. Move them to a
common location, so other arches can use them as well.

This also fixes a bug on ARM MMU=n configurations:
Previously these two functions these functions only respected
dma-ranges translation when compiled with MMU support. DMA address
translation is applicable regardless of CPU use of MMU though.
Now, dma-ranges should be respected unconditionally.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 40 deletions

diff --git a/arch/arm/cpu/mmu-common.c b/arch/arm/cpu/mmu-common.c
index 287622b203..5cc5138cfa 100644
--- a/arch/arm/cpu/mmu-common.c
+++ b/arch/arm/cpu/mmu-common.c
@@ -10,27 +10,6 @@
 #include <memory.h>
 #include "mmu.h"
 
-
-static inline dma_addr_t cpu_to_dma(struct device_d *dev, unsigned long cpu_addr)
-{
-	dma_addr_t dma_addr = cpu_addr;
-
-	if (dev)
-		dma_addr -= dev->dma_offset;
-
-	return dma_addr;
-}
-
-static inline unsigned long dma_to_cpu(struct device_d *dev, dma_addr_t addr)
-{
-	unsigned long cpu_addr = addr;
-
-	if (dev)
-		cpu_addr += dev->dma_offset;
-
-	return cpu_addr;
-}
-
 void dma_sync_single_for_cpu(dma_addr_t address, size_t size,
 			     enum dma_data_direction dir)
 {
@@ -41,24 +20,6 @@ void dma_sync_single_for_cpu(dma_addr_t address, size_t size,
 		dma_inv_range((void *)address, size);
 }
 
-dma_addr_t dma_map_single(struct device_d *dev, void *ptr, size_t size,
-			  enum dma_data_direction dir)
-{
-	unsigned long addr = (unsigned long)ptr;
-
-	dma_sync_single_for_device(addr, size, dir);
-
-	return cpu_to_dma(dev, addr);
-}
-
-void dma_unmap_single(struct device_d *dev, dma_addr_t dma_addr, size_t size,
-		      enum dma_data_direction dir)
-{
-	unsigned long addr = dma_to_cpu(dev, dma_addr);
-
-	dma_sync_single_for_cpu(addr, size, dir);
-}
-
 void *dma_alloc_map(size_t size, dma_addr_t *dma_handle, unsigned flags)
 {
 	void *ret;
@@ -108,4 +69,4 @@ static int mmu_init(void)
 
 	return 0;
 }
-mmu_initcall(mmu_init);
\ No newline at end of file
+mmu_initcall(mmu_init);