arch/mips/include/asm/mach-cavium-octeon/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  *
   9  * Similar to mach-generic/dma-coherence.h except
  10  * plat_device_is_coherent hard coded to return 1.
  11  *
  12  */
  13 #ifndef __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H
  14 #define __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H
  15
  16 struct device;
  17
  18 dma_addr_t octeon_map_dma_mem(struct device *, void *, size_t);
  19 void octeon_unmap_dma_mem(struct device *, dma_addr_t);
  20
  21 static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
  22         size_t size)
  23 {
  24         return octeon_map_dma_mem(dev, addr, size);
  25 }
  26
  27 static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
  28         struct page *page)
  29 {
  30         return octeon_map_dma_mem(dev, page_address(page), PAGE_SIZE);
  31 }
  32
  33 static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
  34         dma_addr_t dma_addr)
  35 {
  36         return dma_addr;
  37 }
  38
  39 static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
  40         size_t size, enum dma_data_direction direction)
  41 {
  42         octeon_unmap_dma_mem(dev, dma_addr);
  43 }
  44
  45 static inline int plat_dma_supported(struct device *dev, u64 mask)
  46 {
  47         return 1;
  48 }
  49
  50 static inline void plat_extra_sync_for_device(struct device *dev)
  51 {
  52         mb();
  53 }
  54
  55 static inline int plat_device_is_coherent(struct device *dev)
  56 {
  57         return 1;
  58 }
  59
  60 static inline int plat_dma_mapping_error(struct device *dev,
  61                                          dma_addr_t dma_addr)
  62 {
  63         return dma_addr == -1;
  64 }
  65
  66 #endif /* __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H */