mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
3.0 KiB
112 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _LINUX_MMIOTRACE_H |
|
#define _LINUX_MMIOTRACE_H |
|
|
|
#include <linux/types.h> |
|
#include <linux/list.h> |
|
|
|
struct kmmio_probe; |
|
struct pt_regs; |
|
|
|
typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *, |
|
struct pt_regs *, unsigned long addr); |
|
typedef void (*kmmio_post_handler_t)(struct kmmio_probe *, |
|
unsigned long condition, struct pt_regs *); |
|
|
|
struct kmmio_probe { |
|
/* kmmio internal list: */ |
|
struct list_head list; |
|
/* start location of the probe point: */ |
|
unsigned long addr; |
|
/* length of the probe region: */ |
|
unsigned long len; |
|
/* Called before addr is executed: */ |
|
kmmio_pre_handler_t pre_handler; |
|
/* Called after addr is executed: */ |
|
kmmio_post_handler_t post_handler; |
|
void *private; |
|
}; |
|
|
|
extern unsigned int kmmio_count; |
|
|
|
extern int register_kmmio_probe(struct kmmio_probe *p); |
|
extern void unregister_kmmio_probe(struct kmmio_probe *p); |
|
extern int kmmio_init(void); |
|
extern void kmmio_cleanup(void); |
|
|
|
#ifdef CONFIG_MMIOTRACE |
|
/* kmmio is active by some kmmio_probes? */ |
|
static inline int is_kmmio_active(void) |
|
{ |
|
return kmmio_count; |
|
} |
|
|
|
/* Called from page fault handler. */ |
|
extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); |
|
|
|
/* Called from ioremap.c */ |
|
extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, |
|
void __iomem *addr); |
|
extern void mmiotrace_iounmap(volatile void __iomem *addr); |
|
|
|
/* For anyone to insert markers. Remember trailing newline. */ |
|
extern __printf(1, 2) int mmiotrace_printk(const char *fmt, ...); |
|
#else /* !CONFIG_MMIOTRACE: */ |
|
static inline int is_kmmio_active(void) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void mmiotrace_ioremap(resource_size_t offset, |
|
unsigned long size, void __iomem *addr) |
|
{ |
|
} |
|
|
|
static inline void mmiotrace_iounmap(volatile void __iomem *addr) |
|
{ |
|
} |
|
|
|
static inline __printf(1, 2) int mmiotrace_printk(const char *fmt, ...) |
|
{ |
|
return 0; |
|
} |
|
#endif /* CONFIG_MMIOTRACE */ |
|
|
|
enum mm_io_opcode { |
|
MMIO_READ = 0x1, /* struct mmiotrace_rw */ |
|
MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ |
|
MMIO_PROBE = 0x3, /* struct mmiotrace_map */ |
|
MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ |
|
MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ |
|
}; |
|
|
|
struct mmiotrace_rw { |
|
resource_size_t phys; /* PCI address of register */ |
|
unsigned long value; |
|
unsigned long pc; /* optional program counter */ |
|
int map_id; |
|
unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ |
|
unsigned char width; /* size of register access in bytes */ |
|
}; |
|
|
|
struct mmiotrace_map { |
|
resource_size_t phys; /* base address in PCI space */ |
|
unsigned long virt; /* base virtual address */ |
|
unsigned long len; /* mapping size */ |
|
int map_id; |
|
unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ |
|
}; |
|
|
|
/* in kernel/trace/trace_mmiotrace.c */ |
|
extern void enable_mmiotrace(void); |
|
extern void disable_mmiotrace(void); |
|
extern void mmio_trace_rw(struct mmiotrace_rw *rw); |
|
extern void mmio_trace_mapping(struct mmiotrace_map *map); |
|
extern __printf(1, 0) int mmio_trace_printk(const char *fmt, va_list args); |
|
|
|
#endif /* _LINUX_MMIOTRACE_H */
|
|
|