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
  27 /*
  28  * Common unbind function for all event sources. Takes IRQ to unbind from.
  29  * Automatically closes the underlying event channel (even for bindings
  30  * made with bind_evtchn_to_irqhandler()).
  31  */
  32 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
  33
  34 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
  35 int resend_irq_on_evtchn(unsigned int irq);
  36 void rebind_evtchn_irq(int evtchn, int irq);
  37
  38 static inline void notify_remote_via_evtchn(int port)
  39 {
  40         struct evtchn_send send = { .port = port };
  41         (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
  42 }
  43
  44 extern void notify_remote_via_irq(int irq);
  45
  46 extern void xen_irq_resume(void);
  47
  48 /* Clear an irq's pending state, in preparation for polling on it */
  49 void xen_clear_irq_pending(int irq);
  50 void xen_set_irq_pending(int irq);
  51 bool xen_test_irq_pending(int irq);
  52
  53 /* Poll waiting for an irq to become pending.  In the usual case, the
  54    irq will be disabled so it won't deliver an interrupt. */
  55 void xen_poll_irq(int irq);
  56
  57 /* Poll waiting for an irq to become pending with a timeout.  In the usual case,
  58  * the irq will be disabled so it won't deliver an interrupt. */
  59 void xen_poll_irq_timeout(int irq, u64 timeout);
  60
  61 /* Determine the IRQ which is bound to an event channel */
  62 unsigned irq_from_evtchn(unsigned int evtchn);
  63
  64 /* Xen HVM evtchn vector callback */
  65 extern void xen_hvm_callback_vector(void);
  66 extern int xen_have_vector_callback;
  67 int xen_set_callback_via(uint64_t via);
  68 void xen_evtchn_do_upcall(struct pt_regs *regs);
  69 void xen_hvm_evtchn_do_upcall(void);
  70
  71 /* Allocate an irq for a physical interrupt, given a gsi.  "Legacy"
  72  * GSIs are identity mapped; others are dynamically allocated as
  73  * usual. */
  74 int xen_allocate_pirq(unsigned gsi, int shareable, char *name);
  75 int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name);
  76
  77 #ifdef CONFIG_PCI_MSI
  78 /* Allocate an irq and a pirq to be used with MSIs. */
  79 #define XEN_ALLOC_PIRQ (1 << 0)
  80 #define XEN_ALLOC_IRQ  (1 << 1)
  81 void xen_allocate_pirq_msi(char *name, int *irq, int *pirq, int alloc_mask);
  82 int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type);
  83 #endif
  84
  85 /* De-allocates the above mentioned physical interrupt. */
  86 int xen_destroy_irq(int irq);
  87
  88 /* Return vector allocated to pirq */
  89 int xen_vector_from_irq(unsigned pirq);
  90
  91 /* Return gsi allocated to pirq */
  92 int xen_gsi_from_irq(unsigned pirq);
  93
  94 /* Return irq from pirq */
  95 int xen_irq_from_pirq(unsigned pirq);
  96
  97 #endif  /* _XEN_EVENTS_H */