1/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. 2 * 3 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net) 4 */ 5 6#ifndef _IOMMU_COMMON_H 7#define _IOMMU_COMMON_H 8 9#include <linux/kernel.h> 10#include <linux/types.h> 11#include <linux/sched.h> 12#include <linux/mm.h> 13#include <linux/scatterlist.h> 14#include <linux/device.h> 15#include <linux/iommu-helper.h> 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) ALIGN(addr, IO_PAGE_SIZE) 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 36#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) 37 38static inline int is_span_boundary(unsigned long entry, 39 unsigned long shift, 40 unsigned long boundary_size, 41 struct scatterlist *outs, 42 struct scatterlist *sg) 43{ 44 unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); 45 int nr = iommu_num_pages(paddr, outs->dma_length + sg->length, 46 IO_PAGE_SIZE); 47 48 return iommu_is_span_boundary(entry, nr, shift, boundary_size); 49} 50 51extern unsigned long iommu_range_alloc(struct device *dev, 52 struct iommu *iommu, 53 unsigned long npages, 54 unsigned long *handle); 55extern void iommu_range_free(struct iommu *iommu, 56 dma_addr_t dma_addr, 57 unsigned long npages); 58 59#endif /* _IOMMU_COMMON_H */ 60