arch/mips/include/asm/mach-jazz/dma-coherence.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2006  Ralf Baechle <ralf@linux-mips.org>
   7  */
   8 #ifndef __ASM_MACH_JAZZ_DMA_COHERENCE_H
   9 #define __ASM_MACH_JAZZ_DMA_COHERENCE_H
  10
  11 #include <asm/jazzdma.h>
  12
  13 struct device;
  14
  15 static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
  16 {
  17         return vdma_alloc(virt_to_phys(addr), size);
  18 }
  19
  20 static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
  21         struct page *page)
  22 {
  23         return vdma_alloc(page_to_phys(page), PAGE_SIZE);
  24 }
  25
  26 static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
  27         dma_addr_t dma_addr)
  28 {
  29         return vdma_log2phys(dma_addr);
  30 }
  31
  32 static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
  33         size_t size, enum dma_data_direction direction)
  34 {
  35         vdma_free(dma_addr);
  36 }
  37
  38 static inline int plat_dma_supported(struct device *dev, u64 mask)
  39 {
  40         /*
  41          * we fall back to GFP_DMA when the mask isn't all 1s,
  42          * so we can't guarantee allocations that must be
  43          * within a tighter range than GFP_DMA..
  44          */
  45         if (mask < DMA_BIT_MASK(24))
  46                 return 0;
  47
  48         return 1;
  49 }
  50
  51 static inline void plat_post_dma_flush(struct device *dev)
  52 {
  53 }
  54
  55 static inline int plat_device_is_coherent(struct device *dev)
  56 {
  57         return 0;
  58 }
  59
  60 #endif /* __ASM_MACH_JAZZ_DMA_COHERENCE_H */