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e2c9784325
Documentation: The Drivers Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
#ifndef _ASM_LGUEST_DEVICE_H
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#define _ASM_LGUEST_DEVICE_H
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/* Everything you need to know about lguest devices. */
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#include <linux/device.h>
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#include <linux/lguest.h>
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#include <linux/lguest_launcher.h>
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struct lguest_device {
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/* Unique busid, and index into lguest_page->devices[] */
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unsigned int index;
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struct device dev;
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/* Driver can hang data off here. */
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void *private;
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};
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/*D:380 Since interrupt numbers are arbitrary, we use a convention: each device
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* can use the interrupt number corresponding to its index. The +1 is because
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* interrupt 0 is not usable (it's actually the timer interrupt). */
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static inline int lgdev_irq(const struct lguest_device *dev)
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{
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return dev->index + 1;
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}
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/*:*/
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/* dma args must not be vmalloced! */
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void lguest_send_dma(unsigned long key, struct lguest_dma *dma);
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int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas,
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unsigned int num, u8 irq);
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void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas);
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/* Map the virtual device space */
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void *lguest_map(unsigned long phys_addr, unsigned long pages);
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void lguest_unmap(void *);
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struct lguest_driver {
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const char *name;
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struct module *owner;
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u16 device_type;
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int (*probe)(struct lguest_device *dev);
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void (*remove)(struct lguest_device *dev);
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struct device_driver drv;
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};
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extern int register_lguest_driver(struct lguest_driver *drv);
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extern void unregister_lguest_driver(struct lguest_driver *drv);
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extern struct lguest_device_desc *lguest_devices; /* Just past max_pfn */
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#endif /* _ASM_LGUEST_DEVICE_H */
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