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
  10 int bind_evtchn_to_irq(unsigned int evtchn);
  11 int bind_evtchn_to_irqhandler(unsigned int evtchn,
  12                               irq_handler_t handler,
  13                               unsigned long irqflags, const char *devname,
  14                               void *dev_id);
  15 int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
  16 int 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);
  20 int 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 int 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  */
  38 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
  39
  40 /*
  41  * Allow extra references to event channels exposed to userspace by evtchn
  42  */
  43 int evtchn_make_refcounted(unsigned int evtchn);
  44 int evtchn_get(unsigned int evtchn);
  45 void evtchn_put(unsigned int evtchn);
  46
  47 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  48 int resend_irq_on_evtchn(unsigned int irq);
  49 void rebind_evtchn_irq(int evtchn, int irq);
  50
  51 static 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
  57 void notify_remote_via_irq(int irq);
  58
  59 void xen_irq_resume(void);
  60
  61 /* Clear an irq's pending state, in preparation for polling on it */
  62 void xen_clear_irq_pending(int irq);
  63 void xen_set_irq_pending(int irq);
  64 bool 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. */
  68 void 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. */
  72 void xen_poll_irq_timeout(int irq, u64 timeout);
  73
  74 /* Determine the IRQ which is bound to an event channel */
  75 unsigned irq_from_evtchn(unsigned int evtchn);
  76
  77 /* Xen HVM evtchn vector callback */
  78 void xen_hvm_callback_vector(void);
  79 #ifdef CONFIG_TRACING
  80 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector
  81 #endif
  82 extern int xen_have_vector_callback;
  83 int xen_set_callback_via(uint64_t via);
  84 void xen_evtchn_do_upcall(struct pt_regs *regs);
  85 void xen_hvm_evtchn_do_upcall(void);
  86
  87 /* Bind a pirq for a physical interrupt to an irq. */
  88 int xen_bind_pirq_gsi_to_irq(unsigned gsi,
  89                              unsigned pirq, int shareable, char *name);
  90
  91 #ifdef CONFIG_PCI_MSI
  92 /* Allocate a pirq for a MSI style physical interrupt. */
  93 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
  94 /* Bind an PSI pirq to an irq. */
  95 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
  96                              int pirq, const char *name, domid_t domid);
  97 #endif
  98
  99 /* De-allocates the above mentioned physical interrupt. */
 100 int xen_destroy_irq(int irq);
 101
 102 /* Return irq from pirq */
 103 int xen_irq_from_pirq(unsigned pirq);
 104
 105 /* Return the pirq allocated to the irq. */
 106 int xen_pirq_from_irq(unsigned irq);
 107
 108 /* Return the irq allocated to the gsi */
 109 int xen_irq_from_gsi(unsigned gsi);
 110
 111 /* Determine whether to ignore this IRQ if it is passed to a guest. */
 112 int xen_test_irq_shared(int irq);
 113
 114 /* initialize Xen IRQ subsystem */
 115 void xen_init_IRQ(void);
 116 #endif  /* _XEN_EVENTS_H */