iommu_common.h 1.3 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
  3. *
  4. * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
  5. */
  6. #ifndef _IOMMU_COMMON_H
  7. #define _IOMMU_COMMON_H
  8. #include <linux/kernel.h>
  9. #include <linux/types.h>
  10. #include <linux/sched.h>
  11. #include <linux/mm.h>
  12. #include <linux/scatterlist.h>
  13. #include <linux/device.h>
  14. #include <linux/iommu-helper.h>
  15. #include <asm/iommu.h>
  16. /*
  17. * These give mapping size of each iommu pte/tlb.
  18. */
  19. #define IO_PAGE_SHIFT 13
  20. #define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT)
  21. #define IO_PAGE_MASK (~(IO_PAGE_SIZE-1))
  22. #define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE)
  23. #define IO_TSB_ENTRIES (128*1024)
  24. #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
  25. /*
  26. * This is the hardwired shift in the iotlb tag/data parts.
  27. */
  28. #define IOMMU_PAGE_SHIFT 13
  29. #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
  30. static inline int is_span_boundary(unsigned long entry,
  31. unsigned long shift,
  32. unsigned long boundary_size,
  33. struct scatterlist *outs,
  34. struct scatterlist *sg)
  35. {
  36. unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
  37. int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
  38. IO_PAGE_SIZE);
  39. return iommu_is_span_boundary(entry, nr, shift, boundary_size);
  40. }
  41. #endif /* _IOMMU_COMMON_H */