microblaze: Implement __dma_sync_page (2549edd3) · Commits · 戴 / test

arch/microblaze/include/asm/dma-mapping.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -34,7 +34,6 @@
		#define __dma_alloc_coherent(dev, gfp, size, handle) NULL
		#define __dma_free_coherent(size, addr) ((void)0)
		#define __dma_sync(addr, size, rw) ((void)0)
		#define __dma_sync_page(pg, off, sz, rw) ((void)0)

		static inline unsigned long device_to_mask(struct device *dev)
		{

+23 −3

Original line number	Diff line number	Diff line
		@@ -10,6 +10,7 @@
		#include <linux/dma-mapping.h>
		#include <linux/dma-debug.h>
		#include <asm/bug.h>
		#include <asm/cacheflush.h>

		/*
		* Generic direct DMA implementation
		@@ -20,6 +21,23 @@
		* default the offset is PCI_DRAM_OFFSET.
		*/

		static inline void __dma_sync_page(void *vaddr, unsigned long offset,
		size_t size, enum dma_data_direction direction)
		{
		unsigned long start = virt_to_phys(vaddr);

		switch (direction) {
		case DMA_TO_DEVICE:
		flush_dcache_range(start + offset, start + offset + size);
		break;
		case DMA_FROM_DEVICE:
		invalidate_dcache_range(start + offset, start + offset + size);
		break;
		default:
		BUG();
		}
		}

		static unsigned long get_dma_direct_offset(struct device *dev)
		{
		if (dev)
		@@ -85,11 +103,11 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev,
		struct page *page,
		unsigned long offset,
		size_t size,
		enum dma_data_direction dir,
		enum dma_data_direction direction,
		struct dma_attrs *attrs)
		{
		BUG_ON(dir == DMA_NONE);
		__dma_sync_page(page, offset, size, dir);
		BUG_ON(direction == DMA_NONE);
		__dma_sync_page(page, offset, size, direction);
		return page_to_phys(page) + offset + get_dma_direct_offset(dev);
		}

		@@ -99,6 +117,8 @@ static inline void dma_direct_unmap_page(struct device *dev,
		enum dma_data_direction direction,
		struct dma_attrs *attrs)
		{
		/* There is not necessary to do cache cleanup */
		/* __dma_sync_page(dma_address, 0 , size, direction); */
		}

		struct dma_map_ops dma_direct_ops = {