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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113/* 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 */