70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/* 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 */
|