1 #ifndef MMIOTRACE_H 2 #define 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 struct list_head list; /* kmmio internal list */ 17 unsigned long addr; /* start location of the probe point */ 18 unsigned long len; /* length of the probe region */ 19 kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */ 20 kmmio_post_handler_t post_handler; /* Called after addr is executed */ 21 void *private; 22 }; 23 24 /* kmmio is active by some kmmio_probes? */ 25 static inline int is_kmmio_active(void) 26 { 27 extern unsigned int kmmio_count; 28 return kmmio_count; 29 } 30 31 extern int register_kmmio_probe(struct kmmio_probe *p); 32 extern void unregister_kmmio_probe(struct kmmio_probe *p); 33 34 /* Called from page fault handler. */ 35 extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); 36 37 #ifdef CONFIG_MMIOTRACE 38 /* Called from ioremap.c */ 39 extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size, 40 void __iomem *addr); 41 extern void mmiotrace_iounmap(volatile void __iomem *addr); 42 43 /* For anyone to insert markers. Remember trailing newline. */ 44 extern int mmiotrace_printk(const char *fmt, ...) 45 __attribute__ ((format (printf, 1, 2))); 46 #else 47 static inline void mmiotrace_ioremap(resource_size_t offset, 48 unsigned long size, void __iomem *addr) 49 { 50 } 51 52 static inline void mmiotrace_iounmap(volatile void __iomem *addr) 53 { 54 } 55 56 static inline int mmiotrace_printk(const char *fmt, ...) 57 __attribute__ ((format (printf, 1, 0))); 58 59 static inline int mmiotrace_printk(const char *fmt, ...) 60 { 61 return 0; 62 } 63 #endif /* CONFIG_MMIOTRACE */ 64 65 enum mm_io_opcode { 66 MMIO_READ = 0x1, /* struct mmiotrace_rw */ 67 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ 68 MMIO_PROBE = 0x3, /* struct mmiotrace_map */ 69 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ 70 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ 71 }; 72 73 struct mmiotrace_rw { 74 resource_size_t phys; /* PCI address of register */ 75 unsigned long value; 76 unsigned long pc; /* optional program counter */ 77 int map_id; 78 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ 79 unsigned char width; /* size of register access in bytes */ 80 }; 81 82 struct mmiotrace_map { 83 resource_size_t phys; /* base address in PCI space */ 84 unsigned long virt; /* base virtual address */ 85 unsigned long len; /* mapping size */ 86 int map_id; 87 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ 88 }; 89 90 /* in kernel/trace/trace_mmiotrace.c */ 91 extern void enable_mmiotrace(void); 92 extern void disable_mmiotrace(void); 93 extern void mmio_trace_rw(struct mmiotrace_rw *rw); 94 extern void mmio_trace_mapping(struct mmiotrace_map *map); 95 extern int mmio_trace_printk(const char *fmt, va_list args); 96 97 #endif /* MMIOTRACE_H */ 98