Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / mmiotrace.h

diff --git a/kernel/include/linux/mmiotrace.h b/kernel/include/linux/mmiotrace.h
new file mode 100644 (file)
index 0000000..c5d5278
--- /dev/null
+++ b/kernel/include/linux/mmiotrace.h
@@ -0,0 +1,111 @@
+#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 int mmio_trace_printk(const char *fmt, va_list args);
+
+#endif /* _LINUX_MMIOTRACE_H */