/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.

   *

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

   */

  #ifndef _IOMMU_COMMON_H
  #define _IOMMU_COMMON_H

  #include <linux/kernel.h>
  #include <linux/types.h>
  #include <linux/sched.h>
  #include <linux/mm.h>

  #include <linux/scatterlist.h>

  #include <linux/device.h>

  #include <linux/iommu-helper.h>

  
  #include <asm/iommu.h>
  #include <asm/scatterlist.h>
  
  /*
   * These give mapping size of each iommu pte/tlb.
   */
  #define IO_PAGE_SHIFT			13
  #define IO_PAGE_SIZE			(1UL << IO_PAGE_SHIFT)
  #define IO_PAGE_MASK			(~(IO_PAGE_SIZE-1))

  #define IO_PAGE_ALIGN(addr)		ALIGN(addr, IO_PAGE_SIZE)

  
  #define IO_TSB_ENTRIES			(128*1024)
  #define IO_TSB_SIZE			(IO_TSB_ENTRIES * 8)
  
  /*
   * This is the hardwired shift in the iotlb tag/data parts.
   */
  #define IOMMU_PAGE_SHIFT		13

  #define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))

  static inline int is_span_boundary(unsigned long entry,
  				   unsigned long shift,
  				   unsigned long boundary_size,
  				   struct scatterlist *outs,
  				   struct scatterlist *sg)
  {
  	unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);

  	int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
  				 IO_PAGE_SIZE);

  
  	return iommu_is_span_boundary(entry, nr, shift, boundary_size);
  }

  extern unsigned long iommu_range_alloc(struct device *dev,
  				       struct iommu *iommu,
  				       unsigned long npages,
  				       unsigned long *handle);
  extern void iommu_range_free(struct iommu *iommu,
  			     dma_addr_t dma_addr,
  			     unsigned long npages);

  #endif /* _IOMMU_COMMON_H */