| /* 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 <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 unsigned long calc_npages(struct scatterlist *sglist, int nelems) |
| { |
| unsigned long i, npages = 0; |
| struct scatterlist *sg; |
| |
| for_each_sg(sglist, sg, nelems, i) { |
| unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg); |
| npages += iommu_num_pages(paddr, sg->length); |
| } |
| |
| return npages; |
| } |
| |
| 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 */ |
