1/* SPDX-License-Identifier: GPL-2.0 */
 2/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
 3 *
 4 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
 5 */
 6
 7#ifndef _IOMMU_COMMON_H
 8#define _IOMMU_COMMON_H
 9
10#include <linux/kernel.h>
11#include <linux/types.h>
12#include <linux/sched.h>
13#include <linux/mm.h>
14#include <linux/scatterlist.h>
15#include <linux/device.h>
16#include <linux/iommu-helper.h>
17
18#include <asm/iommu.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
51#define SPARC_MAPPING_ERROR	(~(dma_addr_t)0x0)
 
 
 
 
 
 
52
53#endif /* _IOMMU_COMMON_H */

 
 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 */