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iommu_common.h

iommu_common.h 1.5 KB
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  1. /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
    2. 

  2.  *
    3. 

  3.  * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
    4. 

  4.  */
    5. 

  5. 

  6. #ifndef _IOMMU_COMMON_H
    7. 

  7. #define _IOMMU_COMMON_H
    8. 

  8. 

  9. #include <linux/kernel.h>
    10. 

  10. #include <linux/types.h>
    11. 

  11. #include <linux/sched.h>
    12. 

  12. #include <linux/mm.h>
    13. 

  13. #include <linux/scatterlist.h>
    14. 

  14. #include <linux/device.h>
    15. 

  15. #include <linux/iommu-helper.h>
    16. 

  16. 

  17. #include <asm/iommu.h>
    18. 

  18. #include <asm/scatterlist.h>
    19. 

  19. 

  20. /*
    21. 

  21.  * These give mapping size of each iommu pte/tlb.
    22. 

  22.  */
    23. 

  23. #define IO_PAGE_SHIFT			13
    24. 

  24. #define IO_PAGE_SIZE			(1UL << IO_PAGE_SHIFT)
    25. 

  25. #define IO_PAGE_MASK			(~(IO_PAGE_SIZE-1))
    26. 

  26. #define IO_PAGE_ALIGN(addr)		ALIGN(addr, IO_PAGE_SIZE)
    27. 

  27. 

  28. #define IO_TSB_ENTRIES			(128*1024)
    29. 

  29. #define IO_TSB_SIZE			(IO_TSB_ENTRIES * 8)
    30. 

  30. 

  31. /*
    32. 

  32.  * This is the hardwired shift in the iotlb tag/data parts.
    33. 

  33.  */
    34. 

  34. #define IOMMU_PAGE_SHIFT		13
    35. 

  35. 

  36. #define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
    37. 

  37. 

  38. static inline int is_span_boundary(unsigned long entry,
    39. 

  39. 				   unsigned long shift,
    40. 

  40. 				   unsigned long boundary_size,
    41. 

  41. 				   struct scatterlist *outs,
    42. 

  42. 				   struct scatterlist *sg)
    43. 

  43. {
    44. 

  44. 	unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
    45. 

  45. 	int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
    46. 

  46. 				 IO_PAGE_SIZE);
    47. 

  47. 

  48. 	return iommu_is_span_boundary(entry, nr, shift, boundary_size);
    49. 

  49. }
    50. 

  50. 

  51. extern unsigned long iommu_range_alloc(struct device *dev,
    52. 

  52. 				       struct iommu *iommu,
    53. 

  53. 				       unsigned long npages,
    54. 

  54. 				       unsigned long *handle);
    55. 

  55. extern void iommu_range_free(struct iommu *iommu,
    56. 

  56. 			     dma_addr_t dma_addr,
    57. 

  57. 			     unsigned long npages);
    58. 

  58. 

  59. #endif /* _IOMMU_COMMON_H */
    60. 

  60.