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 void notify_remote_via_irq(int irq); 51 52 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 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 a pirq for a physical interrupt, given a gsi. */ 78 int xen_allocate_pirq_gsi(unsigned gsi); 79 /* Bind a pirq for a physical interrupt to an irq. */ 80 int xen_bind_pirq_gsi_to_irq(unsigned gsi, 81 unsigned pirq, int shareable, char *name); 82 83 #ifdef CONFIG_PCI_MSI 84 /* Allocate a pirq for a MSI style physical interrupt. */ 85 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 86 /* Bind an PSI pirq to an irq. */ 87 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 88 int pirq, int vector, const char *name, 89 domid_t domid); 90 #endif 91 92 /* De-allocates the above mentioned physical interrupt. */ 93 int xen_destroy_irq(int irq); 94 95 /* Return irq from pirq */ 96 int xen_irq_from_pirq(unsigned pirq); 97 98 #endif /* _XEN_EVENTS_H */ 99