/* 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) (((addr)+IO_PAGE_SIZE-1)&IO_PAGE_MASK) #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 unsigned long iommu_num_pages(unsigned long vaddr, unsigned long slen) { unsigned long npages; npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK); npages >>= IO_PAGE_SHIFT; return npages; } 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); 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 */