1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
4 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
7 #ifndef _IOMMU_COMMON_H
8 #define _IOMMU_COMMON_H
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/sched.h>
14 #include <linux/scatterlist.h>
15 #include <linux/device.h>
16 #include <linux/iommu-helper.h>
18 #include <asm/iommu.h>
21 * These give mapping size of each iommu pte/tlb.
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)
28 #define IO_TSB_ENTRIES (128*1024)
29 #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
32 * This is the hardwired shift in the iotlb tag/data parts.
34 #define IOMMU_PAGE_SHIFT 13
36 #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
38 static inline int is_span_boundary(unsigned long entry
,
40 unsigned long boundary_size
,
41 struct scatterlist
*outs
,
42 struct scatterlist
*sg
)
44 unsigned long paddr
= SG_ENT_PHYS_ADDRESS(outs
);
45 int nr
= iommu_num_pages(paddr
, outs
->dma_length
+ sg
->length
,
48 return iommu_is_span_boundary(entry
, nr
, shift
, boundary_size
);
51 #endif /* _IOMMU_COMMON_H */