1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* iommu.h: Definitions for the sun5 IOMMU.
3  *
4  * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
5  */
6 #ifndef _SPARC64_IOMMU_H
7 #define _SPARC64_IOMMU_H
8 
9 /* The format of an iopte in the page tables. */
10 #define IOPTE_VALID   0x8000000000000000UL
11 #define IOPTE_64K     0x2000000000000000UL
12 #define IOPTE_STBUF   0x1000000000000000UL
13 #define IOPTE_INTRA   0x0800000000000000UL
14 #define IOPTE_CONTEXT 0x07ff800000000000UL
15 #define IOPTE_PAGE    0x00007fffffffe000UL
16 #define IOPTE_CACHE   0x0000000000000010UL
17 #define IOPTE_WRITE   0x0000000000000002UL
18 
19 #define IOMMU_NUM_CTXS	4096
20 #include <asm/iommu-common.h>
21 
22 struct iommu_arena {
23 	unsigned long	*map;
24 	unsigned int	hint;
25 	unsigned int	limit;
26 };
27 
28 #define ATU_64_SPACE_SIZE 0x800000000 /* 32G */
29 
30 /* Data structures for SPARC ATU architecture */
31 struct atu_iotsb {
32 	void	*table;		/* IOTSB table base virtual addr*/
33 	u64	ra;		/* IOTSB table real addr */
34 	u64	dvma_size;	/* ranges[3].size or OS slected 32G size */
35 	u64	dvma_base;	/* ranges[3].base */
36 	u64	table_size;	/* IOTSB table size */
37 	u64	page_size;	/* IO PAGE size for IOTSB */
38 	u32	iotsb_num;	/* tsbnum is same as iotsb_handle */
39 };
40 
41 struct atu_ranges {
42 	u64	base;
43 	u64	size;
44 };
45 
46 struct atu {
47 	struct	atu_ranges	*ranges;
48 	struct	atu_iotsb	*iotsb;
49 	struct	iommu_map_table	tbl;
50 	u64			base;
51 	u64			size;
52 	u64			dma_addr_mask;
53 };
54 
55 struct iommu {
56 	struct iommu_map_table	tbl;
57 	struct atu		*atu;
58 	spinlock_t		lock;
59 	u32			dma_addr_mask;
60 	iopte_t			*page_table;
61 	unsigned long		iommu_control;
62 	unsigned long		iommu_tsbbase;
63 	unsigned long		iommu_flush;
64 	unsigned long		iommu_flushinv;
65 	unsigned long		iommu_tags;
66 	unsigned long		iommu_ctxflush;
67 	unsigned long		write_complete_reg;
68 	unsigned long		dummy_page;
69 	unsigned long		dummy_page_pa;
70 	unsigned long		ctx_lowest_free;
71 	DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
72 };
73 
74 struct strbuf {
75 	int			strbuf_enabled;
76 	unsigned long		strbuf_control;
77 	unsigned long		strbuf_pflush;
78 	unsigned long		strbuf_fsync;
79 	unsigned long		strbuf_err_stat;
80 	unsigned long		strbuf_tag_diag;
81 	unsigned long		strbuf_line_diag;
82 	unsigned long		strbuf_ctxflush;
83 	unsigned long		strbuf_ctxmatch_base;
84 	unsigned long		strbuf_flushflag_pa;
85 	volatile unsigned long *strbuf_flushflag;
86 	volatile unsigned long	__flushflag_buf[(64+(64-1)) / sizeof(long)];
87 };
88 
89 int iommu_table_init(struct iommu *iommu, int tsbsize,
90 		     u32 dma_offset, u32 dma_addr_mask,
91 		     int numa_node);
92 
93 #endif /* !(_SPARC64_IOMMU_H) */
94