dma: import linux/dma-direction.h to consolidate enum dma_data_direction

Import include/linux/dma-direction.h from Linux 4.13-rc7 and delete
duplicated definitions of enum dma_data_direction.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

arch/arm/include/asm/dma-mapping.h

@@ -8,13 +8,9 @@
 #ifndef __ASM_ARM_DMA_MAPPING_H
 #define __ASM_ARM_DMA_MAPPING_H
 
-#define	dma_mapping_error(x, y)	0
+#include <linux/dma-direction.h>
 
-enum dma_data_direction {
-	DMA_BIDIRECTIONAL	= 0,
-	DMA_TO_DEVICE		= 1,
-	DMA_FROM_DEVICE		= 2,
-};
+#define	dma_mapping_error(x, y)	0
 
 static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
 {

arch/nds32/include/asm/dma-mapping.h

@@ -7,11 +7,7 @@
 #ifndef __ASM_NDS_DMA_MAPPING_H
 #define __ASM_NDS_DMA_MAPPING_H
 
-enum dma_data_direction {
-	DMA_BIDIRECTIONAL	= 0,
-	DMA_TO_DEVICE		= 1,
-	DMA_FROM_DEVICE		= 2,
-};
+#include <linux/dma-direction.h>
 
 static void *dma_alloc_coherent(size_t len, unsigned long *handle)
 {

arch/x86/include/asm/dma-mapping.h

@@ -8,13 +8,9 @@
 #ifndef __ASM_X86_DMA_MAPPING_H
 #define __ASM_X86_DMA_MAPPING_H
 
-#define	dma_mapping_error(x, y)	0
+#include <linux/dma-direction.h>
 
-enum dma_data_direction {
-	DMA_BIDIRECTIONAL	= 0,
-	DMA_TO_DEVICE		= 1,
-	DMA_FROM_DEVICE		= 2,
-};
+#define	dma_mapping_error(x, y)	0
 
 static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
 {

drivers/ata/sata_dwc.c

@@ -26,6 +26,7 @@
 #include <command.h>
 #include <pci.h>
 #include <asm/processor.h>
+#include <linux/dma-direction.h>
 #include <linux/errno.h>
 #include <asm/io.h>
 #include <malloc.h>

drivers/ata/sata_dwc.h

@@ -401,13 +401,6 @@ struct ata_device {
 #endif
 };
 
-enum dma_data_direction {
-	DMA_BIDIRECTIONAL = 0,
-	DMA_TO_DEVICE = 1,
-	DMA_FROM_DEVICE = 2,
-	DMA_NONE = 3,
-};
-
 struct ata_link {
 	struct ata_port		*ap;
 	int			pmp;

drivers/mmc/uniphier-sd.c

@@ -11,10 +11,10 @@
 #include <mmc.h>
 #include <dm.h>
 #include <linux/compat.h>
+#include <linux/dma-direction.h>
 #include <linux/io.h>
 #include <linux/sizes.h>
 #include <asm/unaligned.h>
-#include <asm/dma-mapping.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 

include/linux/dma-direction.h

@@ -0,0 +1,13 @@
+#ifndef _LINUX_DMA_DIRECTION_H
+#define _LINUX_DMA_DIRECTION_H
+/*
+ * These definitions mirror those in pci.h, so they can be used
+ * interchangeably with their PCI_ counterparts.
+ */
+enum dma_data_direction {
+	DMA_BIDIRECTIONAL = 0,
+	DMA_TO_DEVICE = 1,
+	DMA_FROM_DEVICE = 2,
+	DMA_NONE = 3,
+};
+#endif