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authorVineet Gupta <vgupta@synopsys.com>2016-03-16 12:08:57 +0100
committerVineet Gupta <vgupta@synopsys.com>2016-03-19 10:04:09 +0100
commitf2e3d55397ff7ad62e159e14281b346760857935 (patch)
treec24a20b11bd69c34412fa023da623843fccaf575 /arch/arc
parentARC: dma: ioremap: use phys_addr_t consistenctly in code paths (diff)
downloadlinux-f2e3d55397ff7ad62e159e14281b346760857935.tar.xz
linux-f2e3d55397ff7ad62e159e14281b346760857935.zip
ARC: dma: reintroduce platform specific dma<->phys
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/Kconfig3
-rw-r--r--arch/arc/include/asm/dma-mapping.h7
-rw-r--r--arch/arc/mm/dma.c9
3 files changed, 14 insertions, 5 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 8ce092801221..5c086d5eae5b 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -468,6 +468,9 @@ config ARCH_PHYS_ADDR_T_64BIT
config ARCH_DMA_ADDR_T_64BIT
bool
+config ARC_PLAT_NEEDS_PHYS_TO_DMA
+ bool
+
config ARC_CURR_IN_REG
bool "Dedicate Register r25 for current_task pointer"
default y
diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h
index 660205414f1d..266f11c9bd59 100644
--- a/arch/arc/include/asm/dma-mapping.h
+++ b/arch/arc/include/asm/dma-mapping.h
@@ -11,6 +11,13 @@
#ifndef ASM_ARC_DMA_MAPPING_H
#define ASM_ARC_DMA_MAPPING_H
+#ifndef CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA
+#define plat_dma_to_phys(dev, dma_handle) ((phys_addr_t)(dma_handle))
+#define plat_phys_to_dma(dev, paddr) ((dma_addr_t)(paddr))
+#else
+#include <plat/dma.h>
+#endif
+
extern struct dma_map_ops arc_dma_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c
index 608c143e9d38..8c8e36fa5659 100644
--- a/arch/arc/mm/dma.c
+++ b/arch/arc/mm/dma.c
@@ -60,8 +60,7 @@ static void *arc_dma_alloc(struct device *dev, size_t size,
/* This is linear addr (0x8000_0000 based) */
paddr = page_to_phys(page);
- /* For now bus address is exactly same as paddr */
- *dma_handle = paddr;
+ *dma_handle = plat_phys_to_dma(dev, paddr);
/* This is kernel Virtual address (0x7000_0000 based) */
if (need_kvaddr) {
@@ -134,7 +133,7 @@ static dma_addr_t arc_dma_map_page(struct device *dev, struct page *page,
{
phys_addr_t paddr = page_to_phys(page) + offset;
_dma_cache_sync(paddr, size, dir);
- return (dma_addr_t)paddr;
+ return plat_phys_to_dma(dev, paddr);
}
static int arc_dma_map_sg(struct device *dev, struct scatterlist *sg,
@@ -153,13 +152,13 @@ static int arc_dma_map_sg(struct device *dev, struct scatterlist *sg,
static void arc_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
{
- _dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE);
+ _dma_cache_sync(plat_dma_to_phys(dev, dma_handle), size, DMA_FROM_DEVICE);
}
static void arc_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
{
- _dma_cache_sync(dma_handle, size, DMA_TO_DEVICE);
+ _dma_cache_sync(plat_dma_to_phys(dev, dma_handle), size, DMA_TO_DEVICE);
}
static void arc_dma_sync_sg_for_cpu(struct device *dev,