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arc: remove CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA 

We always use the stub definitions, so remove the unused other code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Christoph Hellwig 2017-12-20 11:57:40 +01:00
parent c91a7a405b
commit 57723cb363
3 changed files with 7 additions and 17 deletions
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3
arch/arc/Kconfig
View File

@ -463,9 +463,6 @@ config ARCH_PHYS_ADDR_T_64BIT
config ARCH_DMA_ADDR_T_64BIT
bool
config ARC_PLAT_NEEDS_PHYS_TO_DMA
bool
config ARC_KVADDR_SIZE
int "Kernel Virtual Address Space size (MB)"
range 0 512

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

@ -11,13 +11,6 @@
#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 const struct dma_map_ops arc_dma_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)

14
arch/arc/mm/dma.c
View File

@ -60,7 +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);
*dma_handle = plat_phys_to_dma(dev, paddr);
*dma_handle = paddr;
/* This is kernel Virtual address (0x7000_0000 based) */
if (need_kvaddr) {
@ -92,7 +92,7 @@ static void *arc_dma_alloc(struct device *dev, size_t size,
static void arc_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, unsigned long attrs)
{
phys_addr_t paddr = plat_dma_to_phys(dev, dma_handle);
phys_addr_t paddr = dma_handle;
struct page *page = virt_to_page(paddr);
int is_non_coh = 1;
@ -111,7 +111,7 @@ static int arc_dma_mmap(struct device *dev, struct vm_area_struct *vma,
{
unsigned long user_count = vma_pages(vma);
unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long pfn = __phys_to_pfn(plat_dma_to_phys(dev, dma_addr));
unsigned long pfn = __phys_to_pfn(dma_addr);
unsigned long off = vma->vm_pgoff;
int ret = -ENXIO;
@ -175,7 +175,7 @@ static dma_addr_t arc_dma_map_page(struct device *dev, struct page *page,
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
_dma_cache_sync(paddr, size, dir);
return plat_phys_to_dma(dev, paddr);
return paddr;
}
/*
@ -190,7 +190,7 @@ static void arc_dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
phys_addr_t paddr = plat_dma_to_phys(dev, handle);
phys_addr_t paddr = handle;
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
_dma_cache_sync(paddr, size, dir);
@ -224,13 +224,13 @@ static void arc_dma_unmap_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(plat_dma_to_phys(dev, dma_handle), size, DMA_FROM_DEVICE);
_dma_cache_sync(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(plat_dma_to_phys(dev, dma_handle), size, DMA_TO_DEVICE);
_dma_cache_sync(dma_handle, size, DMA_TO_DEVICE);
}
static void arc_dma_sync_sg_for_cpu(struct device *dev,