1 /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
3 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
6 #ifndef _IOMMU_COMMON_H
7 #define _IOMMU_COMMON_H
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/sched.h>
13 #include <linux/scatterlist.h>
14 #include <linux/device.h>
15 #include <linux/iommu-helper.h>
17 #include <asm/iommu.h>
18 #include <asm/scatterlist.h>
21 * These give mapping size of each iommu pte/tlb.
23 #define IO_PAGE_SHIFT 13
24 #define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT)
25 #define IO_PAGE_MASK (~(IO_PAGE_SIZE-1))
26 #define IO_PAGE_ALIGN(addr) (((addr)+IO_PAGE_SIZE-1)&IO_PAGE_MASK)
28 #define IO_TSB_ENTRIES (128*1024)
29 #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
32 * This is the hardwired shift in the iotlb tag/data parts.
34 #define IOMMU_PAGE_SHIFT 13
36 #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
38 static inline unsigned long iommu_num_pages(unsigned long vaddr,
43 npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK);
44 npages >>= IO_PAGE_SHIFT;
49 static inline int is_span_boundary(unsigned long entry,
51 unsigned long boundary_size,
52 struct scatterlist *outs,
53 struct scatterlist *sg)
55 unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
56 int nr = iommu_num_pages(paddr, outs->dma_length + sg->length);
58 return iommu_is_span_boundary(entry, nr, shift, boundary_size);
61 extern unsigned long iommu_range_alloc(struct device *dev,
64 unsigned long *handle);
65 extern void iommu_range_free(struct iommu *iommu,
67 unsigned long npages);
69 #endif /* _IOMMU_COMMON_H */