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 */ 92