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);
  26int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
  27                                          unsigned int remote_port,
  28                                          irq_handler_t handler,
  29                                          unsigned long irqflags,
  30                                          const char *devname,
  31                                          void *dev_id);
  32
  33/*
  34 * Common unbind function for all event sources. Takes IRQ to unbind from.
  35 * Automatically closes the underlying event channel (even for bindings
  36 * made with bind_evtchn_to_irqhandler()).
  37 */
  38void unbind_from_irqhandler(unsigned int irq, void *dev_id);
  39
  40/*
  41 * Allow extra references to event channels exposed to userspace by evtchn
  42 */
  43int evtchn_make_refcounted(unsigned int evtchn);
  44int evtchn_get(unsigned int evtchn);
  45void evtchn_put(unsigned int evtchn);
  46
  47void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  48int resend_irq_on_evtchn(unsigned int irq);
  49void rebind_evtchn_irq(int evtchn, int irq);
  50
  51static inline void notify_remote_via_evtchn(int port)
  52{
  53        struct evtchn_send send = { .port = port };
  54        (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
  55}
  56
  57void notify_remote_via_irq(int irq);
  58
  59void xen_irq_resume(void);
  60
  61/* Clear an irq's pending state, in preparation for polling on it */
  62void xen_clear_irq_pending(int irq);
  63void xen_set_irq_pending(int irq);
  64bool xen_test_irq_pending(int irq);
  65
  66/* Poll waiting for an irq to become pending.  In the usual case, the
  67   irq will be disabled so it won't deliver an interrupt. */
  68void xen_poll_irq(int irq);
  69
  70/* Poll waiting for an irq to become pending with a timeout.  In the usual case,
  71 * the irq will be disabled so it won't deliver an interrupt. */
  72void xen_poll_irq_timeout(int irq, u64 timeout);
  73
  74/* Determine the IRQ which is bound to an event channel */
  75unsigned irq_from_evtchn(unsigned int evtchn);
  76
  77/* Xen HVM evtchn vector callback */
  78void xen_hvm_callback_vector(void);
  79extern int xen_have_vector_callback;
  80int xen_set_callback_via(uint64_t via);
  81void xen_evtchn_do_upcall(struct pt_regs *regs);
  82void xen_hvm_evtchn_do_upcall(void);
  83
  84/* Bind a pirq for a physical interrupt to an irq. */
  85int xen_bind_pirq_gsi_to_irq(unsigned gsi,
  86                             unsigned pirq, int shareable, char *name);
  87
  88#ifdef CONFIG_PCI_MSI
  89/* Allocate a pirq for a MSI style physical interrupt. */
  90int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
  91/* Bind an PSI pirq to an irq. */
  92int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
  93                             int pirq, const char *name, domid_t domid);
  94#endif
  95
  96/* De-allocates the above mentioned physical interrupt. */
  97int xen_destroy_irq(int irq);
  98
  99/* Return irq from pirq */
 100int xen_irq_from_pirq(unsigned pirq);
 101
 102/* Return the pirq allocated to the irq. */
 103int xen_pirq_from_irq(unsigned irq);
 104
 105/* Return the irq allocated to the gsi */
 106int xen_irq_from_gsi(unsigned gsi);
 107
 108/* Determine whether to ignore this IRQ if it is passed to a guest. */
 109int xen_test_irq_shared(int irq);
 110
 111/* initialize Xen IRQ subsystem */
 112void xen_init_IRQ(void);
 113#endif  /* _XEN_EVENTS_H */
 114