LXR linux/include/xen/events.h

   1#ifndef _XEN_EVENTS_H
   2#define _XEN_EVENTS_H
   3
   4#include <linux/interrupt.h>
   5
   6#include <xen/interface/event_channel.h>
   7#include <asm/xen/hypercall.h>
   8#include <asm/xen/events.h>
   9
  10int bind_evtchn_to_irq(unsigned int evtchn);
  11int bind_evtchn_to_irqhandler(unsigned int evtchn,
  12                              irq_handler_t handler,
  13                              unsigned long irqflags, const char *devname,
  14                              void *dev_id);
  15int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
  16int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
  17                            irq_handler_t handler,
  18                            unsigned long irqflags, const char *devname,
  19                            void *dev_id);
  20int bind_ipi_to_irqhandler(enum ipi_vector ipi,
  21                           unsigned int cpu,
  22                           irq_handler_t handler,
  23                           unsigned long irqflags,
  24                           const char *devname,
  25                           void *dev_id);
  26
  27/*
  28 * Common unbind function for all event sources. Takes IRQ to unbind from.
  29 * Automatically closes the underlying event channel (even for bindings
  30 * made with bind_evtchn_to_irqhandler()).
  31 */
  32void unbind_from_irqhandler(unsigned int irq, void *dev_id);
  33
  34void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  35int resend_irq_on_evtchn(unsigned int irq);
  36void rebind_evtchn_irq(int evtchn, int irq);
  37
  38static inline void notify_remote_via_evtchn(int port)
  39{
  40        struct evtchn_send send = { .port = port };
  41        (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
  42}
  43
  44extern void notify_remote_via_irq(int irq);
  45
  46extern void xen_irq_resume(void);
  47
  48/* Clear an irq's pending state, in preparation for polling on it */
  49void xen_clear_irq_pending(int irq);
  50void xen_set_irq_pending(int irq);
  51bool xen_test_irq_pending(int irq);
  52
  53/* Poll waiting for an irq to become pending.  In the usual case, the
  54   irq will be disabled so it won't deliver an interrupt. */
  55void xen_poll_irq(int irq);
  56
  57/* Poll waiting for an irq to become pending with a timeout.  In the usual case,
  58 * the irq will be disabled so it won't deliver an interrupt. */
  59void xen_poll_irq_timeout(int irq, u64 timeout);
  60
  61/* Determine the IRQ which is bound to an event channel */
  62unsigned irq_from_evtchn(unsigned int evtchn);
  63
  64/* Xen HVM evtchn vector callback */
  65extern void xen_hvm_callback_vector(void);
  66extern int xen_have_vector_callback;
  67int xen_set_callback_via(uint64_t via);
  68void xen_evtchn_do_upcall(struct pt_regs *regs);
  69void xen_hvm_evtchn_do_upcall(void);
  70
  71/* Allocate an irq for a physical interrupt, given a gsi.  "Legacy"
  72 * GSIs are identity mapped; others are dynamically allocated as
  73 * usual. */
  74int xen_allocate_pirq(unsigned gsi, int shareable, char *name);
  75int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name);
  76
  77#ifdef CONFIG_PCI_MSI
  78/* Allocate an irq and a pirq to be used with MSIs. */
  79#define XEN_ALLOC_PIRQ (1 << 0)
  80#define XEN_ALLOC_IRQ  (1 << 1)
  81void xen_allocate_pirq_msi(char *name, int *irq, int *pirq, int alloc_mask);
  82int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type);
  83#endif
  84
  85/* De-allocates the above mentioned physical interrupt. */
  86int xen_destroy_irq(int irq);
  87
  88/* Return vector allocated to pirq */
  89int xen_vector_from_irq(unsigned pirq);
  90
  91/* Return gsi allocated to pirq */
  92int xen_gsi_from_irq(unsigned pirq);
  93
  94/* Return irq from pirq */
  95int xen_irq_from_pirq(unsigned pirq);
  96
  97#endif  /* _XEN_EVENTS_H */
  98