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kernel/linux-rt-4.4.41/arch/mips/include/asm/mach-jazz/dma-coherence.h 1.37 KB
5113f6f70   김현기   kernel add
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  /*
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2006  Ralf Baechle <ralf@linux-mips.org>
   */
  #ifndef __ASM_MACH_JAZZ_DMA_COHERENCE_H
  #define __ASM_MACH_JAZZ_DMA_COHERENCE_H
  
  #include <asm/jazzdma.h>
  
  struct device;
  
  static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
  {
  	return vdma_alloc(virt_to_phys(addr), size);
  }
  
  static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
  	struct page *page)
  {
  	return vdma_alloc(page_to_phys(page), PAGE_SIZE);
  }
  
  static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
  	dma_addr_t dma_addr)
  {
  	return vdma_log2phys(dma_addr);
  }
  
  static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
  	size_t size, enum dma_data_direction direction)
  {
  	vdma_free(dma_addr);
  }
  
  static inline int plat_dma_supported(struct device *dev, u64 mask)
  {
  	/*
  	 * we fall back to GFP_DMA when the mask isn't all 1s,
  	 * so we can't guarantee allocations that must be
  	 * within a tighter range than GFP_DMA..
  	 */
  	if (mask < DMA_BIT_MASK(24))
  		return 0;
  
  	return 1;
  }
  
  static inline void plat_post_dma_flush(struct device *dev)
  {
  }
  
  static inline int plat_device_is_coherent(struct device *dev)
  {
  	return 0;
  }
  
  #endif /* __ASM_MACH_JAZZ_DMA_COHERENCE_H */