dma-mapping: move dma_map_(un)single() to <linux/dma-mapping.h>
The implementation of dma_map_single() and dma_unmap_single() is
exactly the same for all the architectures that support them.
Factor them out to <linux/dma-mapping.h>, and make all drivers to
include <linux/dma-mapping.h> instead of <asm/dma-mapping.h>.
If we need to differentiate them for some architectures, we can
move the generic definitions to <asm-generic/dma-mapping.h>.
Add some comments to the helpers. The concept is quite similar to
the DMA-API of Linux kernel. Drivers are agnostic about what is
going on behind the scene. Just call dma_map_single() before the
DMA, and dma_unmap_single() after it.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 22e90a5..8377eb4 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -63,7 +63,7 @@
#include <linux/usb/gadget.h>
#include <linux/compat.h>
#include <linux/iopoll.h>
-#include <asm/dma-mapping.h>
+#include <linux/dma-mapping.h>
#include <linux/bitmap.h>
#include <linux/bug.h>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 6ad1000..4ec3f6d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -17,9 +17,9 @@
#include <cpu_func.h>
#include <malloc.h>
#include <dwc3-uboot.h>
-#include <asm/dma-mapping.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <dm.h>
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1502d67..e445c70 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -16,10 +16,10 @@
#include <common.h>
#include <cpu_func.h>
#include <malloc.h>
-#include <asm/dma-mapping.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <linux/bug.h>
+#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/usb/ch9.h>
diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index 5288745..7f73926 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -18,7 +18,7 @@
#include <linux/compat.h>
#include <malloc.h>
#include <asm/cache.h>
-#include <asm/dma-mapping.h>
+#include <linux/dma-mapping.h>
#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>