LXR linux/include/xen/events.h

   1#ifndef _XEN_EVENTS_H
   2#define _XEN_EVENTS_H
   3
   4#include <linux/interrupt.h>
   5#ifdef CONFIG_PCI_MSI
   6#include <linux/msi.h>
   7#endif
   8
   9#include <xen/interface/event_channel.h>
  10#include <asm/xen/hypercall.h>
  11#include <asm/xen/events.h>
  12
  13unsigned xen_evtchn_nr_channels(void);
  14
  15int bind_evtchn_to_irq(unsigned int evtchn);
  16int bind_evtchn_to_irqhandler(unsigned int evtchn,
  17                              irq_handler_t handler,
  18                              unsigned long irqflags, const char *devname,
  19                              void *dev_id);
  20int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
  21int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
  22                            irq_handler_t handler,
  23                            unsigned long irqflags, const char *devname,
  24                            void *dev_id);
  25int bind_ipi_to_irqhandler(enum ipi_vector ipi,
  26                           unsigned int cpu,
  27                           irq_handler_t handler,
  28                           unsigned long irqflags,
  29                           const char *devname,
  30                           void *dev_id);
  31int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
  32                                   unsigned int remote_port);
  33int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
  34                                          unsigned int remote_port,
  35                                          irq_handler_t handler,
  36                                          unsigned long irqflags,
  37                                          const char *devname,
  38                                          void *dev_id);
  39
  40/*
  41 * Common unbind function for all event sources. Takes IRQ to unbind from.
  42 * Automatically closes the underlying event channel (even for bindings
  43 * made with bind_evtchn_to_irqhandler()).
  44 */
  45void unbind_from_irqhandler(unsigned int irq, void *dev_id);
  46
  47#define XEN_IRQ_PRIORITY_MAX     EVTCHN_FIFO_PRIORITY_MAX
  48#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
  49#define XEN_IRQ_PRIORITY_MIN     EVTCHN_FIFO_PRIORITY_MIN
  50int xen_set_irq_priority(unsigned irq, unsigned priority);
  51
  52/*
  53 * Allow extra references to event channels exposed to userspace by evtchn
  54 */
  55int evtchn_make_refcounted(unsigned int evtchn);
  56int evtchn_get(unsigned int evtchn);
  57void evtchn_put(unsigned int evtchn);
  58
  59void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  60void rebind_evtchn_irq(int evtchn, int irq);
  61
  62static inline void notify_remote_via_evtchn(int port)
  63{
  64        struct evtchn_send send = { .port = port };
  65        (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
  66}
  67
  68void notify_remote_via_irq(int irq);
  69
  70void xen_irq_resume(void);
  71
  72/* Clear an irq's pending state, in preparation for polling on it */
  73void xen_clear_irq_pending(int irq);
  74void xen_set_irq_pending(int irq);
  75bool xen_test_irq_pending(int irq);
  76
  77/* Poll waiting for an irq to become pending.  In the usual case, the
  78   irq will be disabled so it won't deliver an interrupt. */
  79void xen_poll_irq(int irq);
  80
  81/* Poll waiting for an irq to become pending with a timeout.  In the usual case,
  82 * the irq will be disabled so it won't deliver an interrupt. */
  83void xen_poll_irq_timeout(int irq, u64 timeout);
  84
  85/* Determine the IRQ which is bound to an event channel */
  86unsigned irq_from_evtchn(unsigned int evtchn);
  87int irq_from_virq(unsigned int cpu, unsigned int virq);
  88unsigned int evtchn_from_irq(unsigned irq);
  89
  90/* Xen HVM evtchn vector callback */
  91void xen_hvm_callback_vector(void);
  92#ifdef CONFIG_TRACING
  93#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
  94#endif
  95int xen_set_callback_via(uint64_t via);
  96void xen_evtchn_do_upcall(struct pt_regs *regs);
  97void xen_hvm_evtchn_do_upcall(void);
  98
  99/* Bind a pirq for a physical interrupt to an irq. */
 100int xen_bind_pirq_gsi_to_irq(unsigned gsi,
 101                             unsigned pirq, int shareable, char *name);
 102
 103#ifdef CONFIG_PCI_MSI
 104/* Allocate a pirq for a MSI style physical interrupt. */
 105int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
 106/* Bind an PSI pirq to an irq. */
 107int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 108                             int pirq, int nvec, const char *name, domid_t domid);
 109#endif
 110
 111/* De-allocates the above mentioned physical interrupt. */
 112int xen_destroy_irq(int irq);
 113
 114/* Return irq from pirq */
 115int xen_irq_from_pirq(unsigned pirq);
 116
 117/* Return the pirq allocated to the irq. */
 118int xen_pirq_from_irq(unsigned irq);
 119
 120/* Return the irq allocated to the gsi */
 121int xen_irq_from_gsi(unsigned gsi);
 122
 123/* Determine whether to ignore this IRQ if it is passed to a guest. */
 124int xen_test_irq_shared(int irq);
 125
 126/* initialize Xen IRQ subsystem */
 127void xen_init_IRQ(void);
 128#endif  /* _XEN_EVENTS_H */
 129