projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 19814ea2 | 1 | /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. |
| 1da177e4 | 2 | * |
| 19814ea2 | 3 | * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net) |
| 1da177e4 LT |
4 | */ |
| 5 | ||
| 19814ea2 DM |
6 | #ifndef _IOMMU_COMMON_H |
| 7 | #define _IOMMU_COMMON_H | |
| 8 | ||
| 1da177e4 LT |
9 | #include <linux/kernel.h> |
| 10 | #include <linux/types.h> | |
| 11 | #include <linux/sched.h> | |
| 12 | #include <linux/mm.h> | |
| 24c31eed | 13 | #include <linux/scatterlist.h> |
| fde6a3c8 | 14 | #include <linux/device.h> |
| f0880257 | 15 | #include <linux/iommu-helper.h> |
| 1da177e4 LT |
16 | |
| 17 | #include <asm/iommu.h> | |
| 18 | #include <asm/scatterlist.h> | |
| 19 | ||
| 20 | /* | |
| 21 | * These give mapping size of each iommu pte/tlb. | |
| 22 | */ | |
| 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) | |
| 27 | ||
| 28 | #define IO_TSB_ENTRIES (128*1024) | |
| 29 | #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8) | |
| 30 | ||
| 31 | /* | |
| 32 | * This is the hardwired shift in the iotlb tag/data parts. | |
| 33 | */ | |
| 34 | #define IOMMU_PAGE_SHIFT 13 | |
| 35 | ||
| 38192d52 DM |
36 | #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) |
| 37 | ||
| 38 | static inline unsigned long iommu_num_pages(unsigned long vaddr, | |
| 39 | unsigned long slen) | |
| 40 | { | |
| 41 | unsigned long npages; | |
| 42 | ||
| 43 | npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK); | |
| 44 | npages >>= IO_PAGE_SHIFT; | |
| 45 | ||
| 46 | return npages; | |
| 47 | } | |
| 48 | ||
| 49 | static inline unsigned long calc_npages(struct scatterlist *sglist, int nelems) | |
| 50 | { | |
| 51 | unsigned long i, npages = 0; | |
| 52 | struct scatterlist *sg; | |
| 53 | ||
| 54 | for_each_sg(sglist, sg, nelems, i) { | |
| 55 | unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg); | |
| 56 | npages += iommu_num_pages(paddr, sg->length); | |
| 57 | } | |
| 58 | ||
| 59 | return npages; | |
| 60 | } | |
| 19814ea2 | 61 | |
| f0880257 FT |
62 | static inline int is_span_boundary(unsigned long entry, |
| 63 | unsigned long shift, | |
| 64 | unsigned long boundary_size, | |
| 65 | struct scatterlist *outs, | |
| 66 | struct scatterlist *sg) | |
| 67 | { | |
| 68 | unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); | |
| 69 | int nr = iommu_num_pages(paddr, outs->dma_length + sg->length); | |
| 70 | ||
| 71 | return iommu_is_span_boundary(entry, nr, shift, boundary_size); | |
| 72 | } | |
| 73 | ||
| d284142c DM |
74 | extern unsigned long iommu_range_alloc(struct device *dev, |
| 75 | struct iommu *iommu, | |
| 76 | unsigned long npages, | |
| 77 | unsigned long *handle); | |
| 78 | extern void iommu_range_free(struct iommu *iommu, | |
| 79 | dma_addr_t dma_addr, | |
| 80 | unsigned long npages); | |
| 81 | ||
| 19814ea2 | 82 | #endif /* _IOMMU_COMMON_H */ |