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1 | #ifndef _LINUX_MMIOTRACE_H |
2 | #define _LINUX_MMIOTRACE_H |
3 | |
4 | #include <linux/types.h> |
5 | #include <linux/list.h> |
6 | |
7 | struct kmmio_probe; |
8 | struct pt_regs; |
9 | |
10 | typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *, |
11 | struct pt_regs *, unsigned long addr); |
12 | typedef void (*kmmio_post_handler_t)(struct kmmio_probe *, |
13 | unsigned long condition, struct pt_regs *); |
14 | |
15 | struct kmmio_probe { |
16 | /* kmmio internal list: */ |
17 | struct list_head list; |
18 | /* start location of the probe point: */ |
19 | unsigned long addr; |
20 | /* length of the probe region: */ |
21 | unsigned long len; |
22 | /* Called before addr is executed: */ |
23 | kmmio_pre_handler_t pre_handler; |
24 | /* Called after addr is executed: */ |
25 | kmmio_post_handler_t post_handler; |
26 | void *private; |
27 | }; |
28 | |
29 | extern unsigned int kmmio_count; |
30 | |
31 | extern int register_kmmio_probe(struct kmmio_probe *p); |
32 | extern void unregister_kmmio_probe(struct kmmio_probe *p); |
33 | extern int kmmio_init(void); |
34 | extern void kmmio_cleanup(void); |
35 | |
36 | #ifdef CONFIG_MMIOTRACE |
37 | /* kmmio is active by some kmmio_probes? */ |
38 | static inline int is_kmmio_active(void) |
39 | { |
40 | return kmmio_count; |
41 | } |
42 | |
43 | /* Called from page fault handler. */ |
44 | extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); |
45 | |
46 | /* Called from ioremap.c */ |
47 | extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, |
48 | void __iomem *addr); |
49 | extern void mmiotrace_iounmap(volatile void __iomem *addr); |
50 | |
51 | /* For anyone to insert markers. Remember trailing newline. */ |
52 | extern int mmiotrace_printk(const char *fmt, ...) |
53 | __attribute__ ((format (printf, 1, 2))); |
54 | #else /* !CONFIG_MMIOTRACE: */ |
55 | static inline int is_kmmio_active(void) |
56 | { |
57 | return 0; |
58 | } |
59 | |
60 | static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr) |
61 | { |
62 | return 0; |
63 | } |
64 | |
65 | static inline void mmiotrace_ioremap(resource_size_t offset, |
66 | unsigned long size, void __iomem *addr) |
67 | { |
68 | } |
69 | |
70 | static inline void mmiotrace_iounmap(volatile void __iomem *addr) |
71 | { |
72 | } |
73 | |
74 | static inline int mmiotrace_printk(const char *fmt, ...) |
75 | __attribute__ ((format (printf, 1, 0))); |
76 | |
77 | static inline int mmiotrace_printk(const char *fmt, ...) |
78 | { |
79 | return 0; |
80 | } |
81 | #endif /* CONFIG_MMIOTRACE */ |
82 | |
83 | enum mm_io_opcode { |
84 | MMIO_READ = 0x1, /* struct mmiotrace_rw */ |
85 | MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ |
86 | MMIO_PROBE = 0x3, /* struct mmiotrace_map */ |
87 | MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ |
88 | MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ |
89 | }; |
90 | |
91 | struct mmiotrace_rw { |
92 | resource_size_t phys; /* PCI address of register */ |
93 | unsigned long value; |
94 | unsigned long pc; /* optional program counter */ |
95 | int map_id; |
96 | unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ |
97 | unsigned char width; /* size of register access in bytes */ |
98 | }; |
99 | |
100 | struct mmiotrace_map { |
101 | resource_size_t phys; /* base address in PCI space */ |
102 | unsigned long virt; /* base virtual address */ |
103 | unsigned long len; /* mapping size */ |
104 | int map_id; |
105 | unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ |
106 | }; |
107 | |
108 | /* in kernel/trace/trace_mmiotrace.c */ |
109 | extern void enable_mmiotrace(void); |
110 | extern void disable_mmiotrace(void); |
111 | extern void mmio_trace_rw(struct mmiotrace_rw *rw); |
112 | extern void mmio_trace_mapping(struct mmiotrace_map *map); |
113 | extern int mmio_trace_printk(const char *fmt, va_list args); |
114 | |
115 | #endif /* _LINUX_MMIOTRACE_H */ |
116 |
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