150 lines
4.8 KiB
C
150 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _XEN_EVENTS_H
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#define _XEN_EVENTS_H
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#ifdef CONFIG_PCI_MSI
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#include <linux/msi.h>
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#endif
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#include <xen/interface/event_channel.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/events.h>
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struct xenbus_device;
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unsigned xen_evtchn_nr_channels(void);
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int bind_evtchn_to_irq(evtchn_port_t evtchn);
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int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
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int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
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irq_handler_t handler,
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unsigned long irqflags, const char *devname,
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void *dev_id);
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int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
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irq_handler_t handler,
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unsigned long irqflags, const char *devname,
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void *dev_id);
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int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
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int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
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irq_handler_t handler,
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unsigned long irqflags, const char *devname,
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void *dev_id);
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int bind_ipi_to_irqhandler(enum ipi_vector ipi,
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unsigned int cpu,
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irq_handler_t handler,
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unsigned long irqflags,
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const char *devname,
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void *dev_id);
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int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev,
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evtchn_port_t remote_port);
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int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev,
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evtchn_port_t remote_port,
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irq_handler_t handler,
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unsigned long irqflags,
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const char *devname,
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void *dev_id);
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/*
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* Common unbind function for all event sources. Takes IRQ to unbind from.
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* Automatically closes the underlying event channel (even for bindings
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* made with bind_evtchn_to_irqhandler()).
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*/
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void unbind_from_irqhandler(unsigned int irq, void *dev_id);
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/*
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* Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
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* functions above.
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*/
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void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
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/* Signal an event was spurious, i.e. there was no action resulting from it. */
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#define XEN_EOI_FLAG_SPURIOUS 0x00000001
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#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
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#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
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#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
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int xen_set_irq_priority(unsigned irq, unsigned priority);
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/*
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* Allow extra references to event channels exposed to userspace by evtchn
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*/
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int evtchn_make_refcounted(evtchn_port_t evtchn, bool is_static);
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int evtchn_get(evtchn_port_t evtchn);
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void evtchn_put(evtchn_port_t evtchn);
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void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
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void rebind_evtchn_irq(evtchn_port_t evtchn, int irq);
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static inline void notify_remote_via_evtchn(evtchn_port_t port)
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{
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struct evtchn_send send = { .port = port };
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(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
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}
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void notify_remote_via_irq(int irq);
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void xen_irq_resume(void);
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/* Clear an irq's pending state, in preparation for polling on it */
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void xen_clear_irq_pending(int irq);
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bool xen_test_irq_pending(int irq);
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/* Poll waiting for an irq to become pending. In the usual case, the
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irq will be disabled so it won't deliver an interrupt. */
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void xen_poll_irq(int irq);
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/* Poll waiting for an irq to become pending with a timeout. In the usual case,
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* the irq will be disabled so it won't deliver an interrupt. */
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void xen_poll_irq_timeout(int irq, u64 timeout);
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/* Determine the IRQ which is bound to an event channel */
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unsigned int irq_from_evtchn(evtchn_port_t evtchn);
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int irq_evtchn_from_virq(unsigned int cpu, unsigned int virq,
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evtchn_port_t *evtchn);
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int xen_set_callback_via(uint64_t via);
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int xen_evtchn_do_upcall(void);
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/* Bind a pirq for a physical interrupt to an irq. */
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int xen_bind_pirq_gsi_to_irq(unsigned gsi,
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unsigned pirq, int shareable, char *name);
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#ifdef CONFIG_PCI_MSI
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/* Allocate a pirq for a MSI style physical interrupt. */
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int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
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/* Bind an PSI pirq to an irq. */
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int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
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int pirq, int nvec, const char *name, domid_t domid);
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#endif
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/* De-allocates the above mentioned physical interrupt. */
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int xen_destroy_irq(int irq);
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/* Return the pirq allocated to the irq. */
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int xen_pirq_from_irq(unsigned irq);
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/* Return the irq allocated to the gsi */
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int xen_irq_from_gsi(unsigned gsi);
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/* Determine whether to ignore this IRQ if it is passed to a guest. */
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int xen_test_irq_shared(int irq);
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/* initialize Xen IRQ subsystem */
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void xen_init_IRQ(void);
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irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
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static inline void xen_evtchn_close(evtchn_port_t port)
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{
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struct evtchn_close close;
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close.port = port;
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if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
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BUG();
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}
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extern bool xen_fifo_events;
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#endif /* _XEN_EVENTS_H */
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