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 int xen_allocate_pirq_msi(char *name, int *pirq, int alloc_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 /* Return irq from pirq */ 92 int xen_irq_from_pirq(unsigned pirq); 93 94 #endif /* _XEN_EVENTS_H */ 95