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
38 static 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 #endif /* _IOMMU_COMMON_H */
52
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