[mirror_ubuntu-artful-kernel.git] / include / linux / mmiotrace.h

#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 */
Commit	Line	Data
	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 __printf(1, 2) int mmiotrace_printk(const char *fmt, ...);
	53	#else /* !CONFIG_MMIOTRACE: */
	54	static inline int is_kmmio_active(void)
	55	{
	56	return 0;
	57	}
	58
	59	static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
	60	{
	61	return 0;
	62	}
	63
	64	static inline void mmiotrace_ioremap(resource_size_t offset,
	65	unsigned long size, void __iomem *addr)
	66	{
	67	}
	68
	69	static inline void mmiotrace_iounmap(volatile void __iomem *addr)
	70	{
	71	}
	72
	73	static inline __printf(1, 2) int mmiotrace_printk(const char *fmt, ...)
	74	{
	75	return 0;
	76	}
	77	#endif /* CONFIG_MMIOTRACE */
	78
	79	enum mm_io_opcode {
	80	MMIO_READ = 0x1, /* struct mmiotrace_rw */
	81	MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
	82	MMIO_PROBE = 0x3, /* struct mmiotrace_map */
	83	MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
	84	MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
	85	};
	86
	87	struct mmiotrace_rw {
	88	resource_size_t phys; /* PCI address of register */
	89	unsigned long value;
	90	unsigned long pc; /* optional program counter */
	91	int map_id;
	92	unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
	93	unsigned char width; /* size of register access in bytes */
	94	};
	95
	96	struct mmiotrace_map {
	97	resource_size_t phys; /* base address in PCI space */
	98	unsigned long virt; /* base virtual address */
	99	unsigned long len; /* mapping size */
	100	int map_id;
	101	unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
	102	};
	103
	104	/* in kernel/trace/trace_mmiotrace.c */
	105	extern void enable_mmiotrace(void);
	106	extern void disable_mmiotrace(void);
	107	extern void mmio_trace_rw(struct mmiotrace_rw *rw);
	108	extern void mmio_trace_mapping(struct mmiotrace_map *map);
	109	extern __printf(1, 0) int mmio_trace_printk(const char *fmt, va_list args);
	110
	111	#endif /* _LINUX_MMIOTRACE_H */