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-rw-r--r--include/linux/mmiotrace.h78
1 files changed, 47 insertions, 31 deletions
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h
index 139d7c88d9c9..3d1b7bde1283 100644
--- a/include/linux/mmiotrace.h
+++ b/include/linux/mmiotrace.h
@@ -1,5 +1,5 @@
1#ifndef MMIOTRACE_H 1#ifndef _LINUX_MMIOTRACE_H
2#define MMIOTRACE_H 2#define _LINUX_MMIOTRACE_H
3 3
4#include <linux/types.h> 4#include <linux/types.h>
5#include <linux/list.h> 5#include <linux/list.h>
@@ -13,28 +13,34 @@ typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
13 unsigned long condition, struct pt_regs *); 13 unsigned long condition, struct pt_regs *);
14 14
15struct kmmio_probe { 15struct kmmio_probe {
16 struct list_head list; /* kmmio internal list */ 16 /* kmmio internal list: */
17 unsigned long addr; /* start location of the probe point */ 17 struct list_head list;
18 unsigned long len; /* length of the probe region */ 18 /* start location of the probe point: */
19 kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */ 19 unsigned long addr;
20 kmmio_post_handler_t post_handler; /* Called after addr is executed */ 20 /* length of the probe region: */
21 void *private; 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;
22}; 27};
23 28
29extern unsigned int kmmio_count;
30
31extern int register_kmmio_probe(struct kmmio_probe *p);
32extern void unregister_kmmio_probe(struct kmmio_probe *p);
33
34#ifdef CONFIG_MMIOTRACE
24/* kmmio is active by some kmmio_probes? */ 35/* kmmio is active by some kmmio_probes? */
25static inline int is_kmmio_active(void) 36static inline int is_kmmio_active(void)
26{ 37{
27 extern unsigned int kmmio_count;
28 return kmmio_count; 38 return kmmio_count;
29} 39}
30 40
31extern int register_kmmio_probe(struct kmmio_probe *p);
32extern void unregister_kmmio_probe(struct kmmio_probe *p);
33
34/* Called from page fault handler. */ 41/* Called from page fault handler. */
35extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); 42extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
36 43
37#ifdef CONFIG_MMIOTRACE
38/* Called from ioremap.c */ 44/* Called from ioremap.c */
39extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, 45extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
40 void __iomem *addr); 46 void __iomem *addr);
@@ -43,7 +49,17 @@ extern void mmiotrace_iounmap(volatile void __iomem *addr);
43/* For anyone to insert markers. Remember trailing newline. */ 49/* For anyone to insert markers. Remember trailing newline. */
44extern int mmiotrace_printk(const char *fmt, ...) 50extern int mmiotrace_printk(const char *fmt, ...)
45 __attribute__ ((format (printf, 1, 2))); 51 __attribute__ ((format (printf, 1, 2)));
46#else 52#else /* !CONFIG_MMIOTRACE: */
53static inline int is_kmmio_active(void)
54{
55 return 0;
56}
57
58static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
59{
60 return 0;
61}
62
47static inline void mmiotrace_ioremap(resource_size_t offset, 63static inline void mmiotrace_ioremap(resource_size_t offset,
48 unsigned long size, void __iomem *addr) 64 unsigned long size, void __iomem *addr)
49{ 65{
@@ -63,28 +79,28 @@ static inline int mmiotrace_printk(const char *fmt, ...)
63#endif /* CONFIG_MMIOTRACE */ 79#endif /* CONFIG_MMIOTRACE */
64 80
65enum mm_io_opcode { 81enum mm_io_opcode {
66 MMIO_READ = 0x1, /* struct mmiotrace_rw */ 82 MMIO_READ = 0x1, /* struct mmiotrace_rw */
67 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ 83 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
68 MMIO_PROBE = 0x3, /* struct mmiotrace_map */ 84 MMIO_PROBE = 0x3, /* struct mmiotrace_map */
69 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ 85 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
70 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ 86 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
71}; 87};
72 88
73struct mmiotrace_rw { 89struct mmiotrace_rw {
74 resource_size_t phys; /* PCI address of register */ 90 resource_size_t phys; /* PCI address of register */
75 unsigned long value; 91 unsigned long value;
76 unsigned long pc; /* optional program counter */ 92 unsigned long pc; /* optional program counter */
77 int map_id; 93 int map_id;
78 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ 94 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
79 unsigned char width; /* size of register access in bytes */ 95 unsigned char width; /* size of register access in bytes */
80}; 96};
81 97
82struct mmiotrace_map { 98struct mmiotrace_map {
83 resource_size_t phys; /* base address in PCI space */ 99 resource_size_t phys; /* base address in PCI space */
84 unsigned long virt; /* base virtual address */ 100 unsigned long virt; /* base virtual address */
85 unsigned long len; /* mapping size */ 101 unsigned long len; /* mapping size */
86 int map_id; 102 int map_id;
87 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ 103 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
88}; 104};
89 105
90/* in kernel/trace/trace_mmiotrace.c */ 106/* in kernel/trace/trace_mmiotrace.c */
@@ -94,4 +110,4 @@ extern void mmio_trace_rw(struct mmiotrace_rw *rw);
94extern void mmio_trace_mapping(struct mmiotrace_map *map); 110extern void mmio_trace_mapping(struct mmiotrace_map *map);
95extern int mmio_trace_printk(const char *fmt, va_list args); 111extern int mmio_trace_printk(const char *fmt, va_list args);
96 112
97#endif /* MMIOTRACE_H */ 113#endif /* _LINUX_MMIOTRACE_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 00:43:51 -0500