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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-03-16 16:38:57 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-03-19 14:34:09 +0530 |
| commit | f2e3d55397ff7ad62e159e14281b346760857935 (patch) | |
| tree | c24a20b11bd69c34412fa023da623843fccaf575 /arch/arc | |
| parent | f5db19e93f680160a0fb3e2b05ceb4832b24d486 (diff) | |
| download | linux-f2e3d55397ff7ad62e159e14281b346760857935.tar.gz linux-f2e3d55397ff7ad62e159e14281b346760857935.tar.bz2 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/Kconfig | 3 | ||||
| -rw-r--r-- | arch/arc/include/asm/dma-mapping.h | 7 | ||||
| -rw-r--r-- | arch/arc/mm/dma.c | 9 |
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, |