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ARC: dma: reintroduce platform specific dma<->phys 

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
hifive-unleashed-5.1
Vineet Gupta 2016-03-16 16:38:57 +05:30
parent f5db19e93f
commit f2e3d55397
3 changed files with 14 additions and 5 deletions
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3
arch/arc/Kconfig
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@ -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

7
arch/arc/include/asm/dma-mapping.h
View File

@ -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)

9
arch/arc/mm/dma.c
View File

@ -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,