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8b7d89d0 PP |
1 | #ifndef MMIOTRACE_H |
2 | #define MMIOTRACE_H | |
3 | ||
970e6fa0 | 4 | #include <linux/types.h> |
0fd0e3da PP |
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 { | |
d61fc448 | 16 | struct list_head list; /* kmmio internal list */ |
0fd0e3da PP |
17 | unsigned long addr; /* start location of the probe point */ |
18 | unsigned long len; /* length of the probe region */ | |
19 | kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */ | |
20 | kmmio_post_handler_t post_handler; /* Called after addr is executed */ | |
a50445d7 | 21 | void *private; |
0fd0e3da PP |
22 | }; |
23 | ||
24 | /* kmmio is active by some kmmio_probes? */ | |
25 | static inline int is_kmmio_active(void) | |
26 | { | |
27 | extern unsigned int kmmio_count; | |
28 | return kmmio_count; | |
29 | } | |
30 | ||
0fd0e3da PP |
31 | extern int register_kmmio_probe(struct kmmio_probe *p); |
32 | extern void unregister_kmmio_probe(struct kmmio_probe *p); | |
33 | ||
34 | /* Called from page fault handler. */ | |
35 | extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); | |
36 | ||
d61fc448 | 37 | #ifdef CONFIG_MMIOTRACE |
9e57fb35 | 38 | /* Called from ioremap.c */ |
dee310d0 PP |
39 | extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, |
40 | void __iomem *addr); | |
d61fc448 | 41 | extern void mmiotrace_iounmap(volatile void __iomem *addr); |
9e57fb35 PP |
42 | |
43 | /* For anyone to insert markers. Remember trailing newline. */ | |
44 | extern int mmiotrace_printk(const char *fmt, ...) | |
45 | __attribute__ ((format (printf, 1, 2))); | |
d61fc448 | 46 | #else |
dee310d0 PP |
47 | static inline void mmiotrace_ioremap(resource_size_t offset, |
48 | unsigned long size, void __iomem *addr) | |
d61fc448 PP |
49 | { |
50 | } | |
dee310d0 | 51 | |
d61fc448 PP |
52 | static inline void mmiotrace_iounmap(volatile void __iomem *addr) |
53 | { | |
54 | } | |
9e57fb35 PP |
55 | |
56 | static inline int mmiotrace_printk(const char *fmt, ...) | |
57 | __attribute__ ((format (printf, 1, 0))); | |
58 | ||
59 | static inline int mmiotrace_printk(const char *fmt, ...) | |
60 | { | |
61 | return 0; | |
62 | } | |
63 | #endif /* CONFIG_MMIOTRACE */ | |
d61fc448 | 64 | |
bd8ac686 PP |
65 | enum mm_io_opcode { |
66 | MMIO_READ = 0x1, /* struct mmiotrace_rw */ | |
67 | MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ | |
68 | MMIO_PROBE = 0x3, /* struct mmiotrace_map */ | |
69 | MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ | |
44274141 | 70 | MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ |
8b7d89d0 PP |
71 | }; |
72 | ||
bd8ac686 | 73 | struct mmiotrace_rw { |
dee310d0 | 74 | resource_size_t phys; /* PCI address of register */ |
bd8ac686 PP |
75 | unsigned long value; |
76 | unsigned long pc; /* optional program counter */ | |
77 | int map_id; | |
78 | unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ | |
79 | unsigned char width; /* size of register access in bytes */ | |
8b7d89d0 PP |
80 | }; |
81 | ||
bd8ac686 | 82 | struct mmiotrace_map { |
dee310d0 | 83 | resource_size_t phys; /* base address in PCI space */ |
bd8ac686 PP |
84 | unsigned long virt; /* base virtual address */ |
85 | unsigned long len; /* mapping size */ | |
86 | int map_id; | |
87 | unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ | |
8b7d89d0 PP |
88 | }; |
89 | ||
bd8ac686 PP |
90 | /* in kernel/trace/trace_mmiotrace.c */ |
91 | extern void enable_mmiotrace(void); | |
92 | extern void disable_mmiotrace(void); | |
93 | extern void mmio_trace_rw(struct mmiotrace_rw *rw); | |
94 | extern void mmio_trace_mapping(struct mmiotrace_map *map); | |
9e57fb35 | 95 | extern int mmio_trace_printk(const char *fmt, va_list args); |
8b7d89d0 | 96 | |
8b7d89d0 | 97 | #endif /* MMIOTRACE_H */ |