1#ifndef _LINUX_MMIOTRACE_H 2#define _LINUX_MMIOTRACE_H 3 4#include <linux/types.h> 5#include <linux/list.h> 6 7struct kmmio_probe; 8struct pt_regs; 9 10typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *, 11 struct pt_regs *, unsigned long addr); 12typedef void (*kmmio_post_handler_t)(struct kmmio_probe *, 13 unsigned long condition, struct pt_regs *); 14 15struct 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 29extern unsigned int kmmio_count; 30 31extern int register_kmmio_probe(struct kmmio_probe *p); 32extern void unregister_kmmio_probe(struct kmmio_probe *p); 33extern int kmmio_init(void); 34extern void kmmio_cleanup(void); 35 36#ifdef CONFIG_MMIOTRACE 37/* kmmio is active by some kmmio_probes? */ 38static inline int is_kmmio_active(void) 39{ 40 return kmmio_count; 41} 42 43/* Called from page fault handler. */ 44extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); 45 46/* Called from ioremap.c */ 47extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, 48 void __iomem *addr); 49extern void mmiotrace_iounmap(volatile void __iomem *addr); 50 51/* For anyone to insert markers. Remember trailing newline. */ 52extern int mmiotrace_printk(const char *fmt, ...) 53 __attribute__ ((format (printf, 1, 2))); 54#else /* !CONFIG_MMIOTRACE: */ 55static inline int is_kmmio_active(void) 56{ 57 return 0; 58} 59 60static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr) 61{ 62 return 0; 63} 64 65static inline void mmiotrace_ioremap(resource_size_t offset, 66 unsigned long size, void __iomem *addr) 67{ 68} 69 70static inline void mmiotrace_iounmap(volatile void __iomem *addr) 71{ 72} 73 74static inline int mmiotrace_printk(const char *fmt, ...) 75 __attribute__ ((format (printf, 1, 0))); 76 77static inline int mmiotrace_printk(const char *fmt, ...) 78{ 79 return 0; 80} 81#endif /* CONFIG_MMIOTRACE */ 82 83enum mm_io_opcode { 84 MMIO_READ = 0x1, /* struct mmiotrace_rw */ 85 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ 86 MMIO_PROBE = 0x3, /* struct mmiotrace_map */ 87 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ 88 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ 89}; 90 91struct mmiotrace_rw { 92 resource_size_t phys; /* PCI address of register */ 93 unsigned long value; 94 unsigned long pc; /* optional program counter */ 95 int map_id; 96 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ 97 unsigned char width; /* size of register access in bytes */ 98}; 99 100struct mmiotrace_map { 101 resource_size_t phys; /* base address in PCI space */ 102 unsigned long virt; /* base virtual address */ 103 unsigned long len; /* mapping size */ 104 int map_id; 105 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ 106}; 107 108/* in kernel/trace/trace_mmiotrace.c */ 109extern void enable_mmiotrace(void); 110extern void disable_mmiotrace(void); 111extern void mmio_trace_rw(struct mmiotrace_rw *rw); 112extern void mmio_trace_mapping(struct mmiotrace_map *map); 113extern int mmio_trace_printk(const char *fmt, va_list args); 114 115#endif /* _LINUX_MMIOTRACE_H */ 116