[GitHub/mt8127/android_kernel_alcatel_ttab.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);

#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 int mmiotrace_printk(const char *fmt, ...)
				__attribute__ ((format (printf, 1, 2)));
#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 int mmiotrace_printk(const char *fmt, ...)
				__attribute__ ((format (printf, 1, 0)));

static inline 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 int mmio_trace_printk(const char *fmt, va_list args);

#endif /* _LINUX_MMIOTRACE_H */
Commit	Line	Data
b814d41f IM	1	#ifndef _LINUX_MMIOTRACE_H
b814d41f IM	2	#define _LINUX_MMIOTRACE_H
8b7d89d0	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 {
b814d41f IM	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;
0fd0e3da PP	27	};
0fd0e3da PP	28
b814d41f IM	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
	34	#ifdef CONFIG_MMIOTRACE
0fd0e3da PP	35	/* kmmio is active by some kmmio_probes? */
	36	static inline int is_kmmio_active(void)
	37	{
0fd0e3da PP	38	return kmmio_count;
	39	}
	40
0fd0e3da PP	41	/* Called from page fault handler. */
	42	extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
	43
9e57fb35	44	/* Called from ioremap.c */
dee310d0 PP	45	extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
dee310d0 PP	46	void __iomem *addr);
d61fc448	47	extern void mmiotrace_iounmap(volatile void __iomem *addr);
9e57fb35 PP	48
	49	/* For anyone to insert markers. Remember trailing newline. */
	50	extern int mmiotrace_printk(const char *fmt, ...)
	51	__attribute__ ((format (printf, 1, 2)));
b814d41f IM	52	#else /* !CONFIG_MMIOTRACE: */
	53	static inline int is_kmmio_active(void)
	54	{
	55	return 0;
	56	}
	57
	58	static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
	59	{
	60	return 0;
	61	}
	62
dee310d0 PP	63	static inline void mmiotrace_ioremap(resource_size_t offset,
dee310d0 PP	64	unsigned long size, void __iomem *addr)
d61fc448 PP	65	{
d61fc448 PP	66	}
dee310d0	67
d61fc448 PP	68	static inline void mmiotrace_iounmap(volatile void __iomem *addr)
	69	{
	70	}
9e57fb35 PP	71
	72	static inline int mmiotrace_printk(const char *fmt, ...)
	73	__attribute__ ((format (printf, 1, 0)));
	74
	75	static inline int mmiotrace_printk(const char *fmt, ...)
	76	{
	77	return 0;
	78	}
	79	#endif /* CONFIG_MMIOTRACE */
d61fc448	80
bd8ac686	81	enum mm_io_opcode {
b814d41f IM	82	MMIO_READ = 0x1, /* struct mmiotrace_rw */
	83	MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
	84	MMIO_PROBE = 0x3, /* struct mmiotrace_map */
	85	MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
	86	MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
8b7d89d0 PP	87	};
8b7d89d0 PP	88
bd8ac686	89	struct mmiotrace_rw {
b814d41f IM	90	resource_size_t phys; /* PCI address of register */
	91	unsigned long value;
	92	unsigned long pc; /* optional program counter */
	93	int map_id;
	94	unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
	95	unsigned char width; /* size of register access in bytes */
8b7d89d0 PP	96	};
8b7d89d0 PP	97
bd8ac686	98	struct mmiotrace_map {
b814d41f IM	99	resource_size_t phys; /* base address in PCI space */
	100	unsigned long virt; /* base virtual address */
	101	unsigned long len; /* mapping size */
	102	int map_id;
	103	unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
8b7d89d0 PP	104	};
8b7d89d0 PP	105
bd8ac686 PP	106	/* in kernel/trace/trace_mmiotrace.c */
	107	extern void enable_mmiotrace(void);
	108	extern void disable_mmiotrace(void);
	109	extern void mmio_trace_rw(struct mmiotrace_rw *rw);
	110	extern void mmio_trace_mapping(struct mmiotrace_map *map);
9e57fb35	111	extern int mmio_trace_printk(const char *fmt, va_list args);
8b7d89d0	112
b814d41f	113	#endif /* _LINUX_MMIOTRACE_H */