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 /*D:380 Since interrupt numbers are arbitrary, we use a convention: each device
  19  * can use the interrupt number corresponding to its index.  The +1 is because
  20  * interrupt 0 is not usable (it's actually the timer interrupt). */
  21 static inline int lgdev_irq(const struct lguest_device *dev)
  22 {
  23         return dev->index + 1;
  24 }
  25 /*:*/
  26
  27 /* dma args must not be vmalloced! */
  28 void lguest_send_dma(unsigned long key, struct lguest_dma *dma);
  29 int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas,
  30                     unsigned int num, u8 irq);
  31 void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas);
  32
  33 /* Map the virtual device space */
  34 void *lguest_map(unsigned long phys_addr, unsigned long pages);
  35 void lguest_unmap(void *);
  36
  37 struct lguest_driver {
  38         const char *name;
  39         struct module *owner;
  40         u16 device_type;
  41         int (*probe)(struct lguest_device *dev);
  42         void (*remove)(struct lguest_device *dev);
  43
  44         struct device_driver drv;
  45 };
  46
  47 extern int register_lguest_driver(struct lguest_driver *drv);
  48 extern void unregister_lguest_driver(struct lguest_driver *drv);
  49
  50 extern struct lguest_device_desc *lguest_devices; /* Just past max_pfn */
  51 #endif /* _ASM_LGUEST_DEVICE_H */