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 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  41 int resend_irq_on_evtchn(unsigned int irq);
  42 void rebind_evtchn_irq(int evtchn, int irq);
  43
  44 static inline void notify_remote_via_evtchn(int port)
  45 {
  46         struct evtchn_send send = { .port = port };
  47         (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
  48 }
  49
  50 extern void notify_remote_via_irq(int irq);
  51
  52 extern void xen_irq_resume(void);
  53
  54 /* Clear an irq's pending state, in preparation for polling on it */
  55 void xen_clear_irq_pending(int irq);
  56 void xen_set_irq_pending(int irq);
  57 bool xen_test_irq_pending(int irq);
  58
  59 /* Poll waiting for an irq to become pending.  In the usual case, the
  60    irq will be disabled so it won't deliver an interrupt. */
  61 void xen_poll_irq(int irq);
  62
  63 /* Poll waiting for an irq to become pending with a timeout.  In the usual case,
  64  * the irq will be disabled so it won't deliver an interrupt. */
  65 void xen_poll_irq_timeout(int irq, u64 timeout);
  66
  67 /* Determine the IRQ which is bound to an event channel */
  68 unsigned irq_from_evtchn(unsigned int evtchn);
  69
  70 /* Xen HVM evtchn vector callback */
  71 extern void xen_hvm_callback_vector(void);
  72 extern int xen_have_vector_callback;
  73 int xen_set_callback_via(uint64_t via);
  74 void xen_evtchn_do_upcall(struct pt_regs *regs);
  75 void xen_hvm_evtchn_do_upcall(void);
  76
  77 /* Allocate an irq for a physical interrupt, given a gsi.  "Legacy"
  78  * GSIs are identity mapped; others are dynamically allocated as
  79  * usual. */
  80 int xen_allocate_pirq(unsigned gsi, int shareable, char *name);
  81 int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name);
  82
  83 #ifdef CONFIG_PCI_MSI
  84 /* Allocate an irq and a pirq to be used with MSIs. */
  85 #define XEN_ALLOC_PIRQ (1 << 0)
  86 #define XEN_ALLOC_IRQ  (1 << 1)
  87 void xen_allocate_pirq_msi(char *name, int *irq, int *pirq, int alloc_mask);
  88 int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type);
  89 #endif
  90
  91 /* De-allocates the above mentioned physical interrupt. */
  92 int xen_destroy_irq(int irq);
  93
  94 /* Return vector allocated to pirq */
  95 int xen_vector_from_irq(unsigned pirq);
  96
  97 /* Return gsi allocated to pirq */
  98 int xen_gsi_from_irq(unsigned pirq);
  99
 100 /* Return irq from pirq */
 101 int xen_irq_from_pirq(unsigned pirq);
 102
 103 #endif  /* _XEN_EVENTS_H */