include/linux/lguest_bus.h

   1 #ifndef _ASM_LGUEST_DEVICE_H
   2 #define _ASM_LGUEST_DEVICE_H
   3 /* Everything you need to know about lguest devices. */
   4 #include <linux/device.h>
   5 #include <linux/lguest.h>
   6 #include <linux/lguest_launcher.h>
   7
   8 struct lguest_device {
   9         /* Unique busid, and index into lguest_page->devices[] */
  10         unsigned int index;
  11
  12         struct device dev;
  13
  14         /* Driver can hang data off here. */
  15         void *private;
  16 };
  17
  18 /* By convention, each device can use irq index+1 if it wants to. */
  19 static inline int lgdev_irq(const struct lguest_device *dev)
  20 {
  21         return dev->index + 1;
  22 }
  23
  24 /* dma args must not be vmalloced! */
  25 void lguest_send_dma(unsigned long key, struct lguest_dma *dma);
  26 int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas,
  27                     unsigned int num, u8 irq);
  28 void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas);
  29
  30 /* Map the virtual device space */
  31 void *lguest_map(unsigned long phys_addr, unsigned long pages);
  32 void lguest_unmap(void *);
  33
  34 struct lguest_driver {
  35         const char *name;
  36         struct module *owner;
  37         u16 device_type;
  38         int (*probe)(struct lguest_device *dev);
  39         void (*remove)(struct lguest_device *dev);
  40
  41         struct device_driver drv;
  42 };
  43
  44 extern int register_lguest_driver(struct lguest_driver *drv);
  45 extern void unregister_lguest_driver(struct lguest_driver *drv);
  46
  47 extern struct lguest_device_desc *lguest_devices; /* Just past max_pfn */
  48 #endif /* _ASM_LGUEST_DEVICE_H */