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(addr: paddr, len: outs->dma_length + sg->length, |
46 | IO_PAGE_SIZE); |
47 | |
48 | return iommu_is_span_boundary(index: entry, nr, shift, boundary_size); |
49 | } |
50 | |
51 | #endif /* _IOMMU_COMMON_H */ |
52 | |