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