1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2e46cdb66SJeremy Fitzhardinge #ifndef _XEN_EVENTS_H 3e46cdb66SJeremy Fitzhardinge #define _XEN_EVENTS_H 4e46cdb66SJeremy Fitzhardinge 5f87e4cacSJeremy Fitzhardinge #include <linux/interrupt.h> 6bce5963bSJuergen Gross #include <linux/irq.h> 74892c9b4SRoger Pau Monne #ifdef CONFIG_PCI_MSI 84892c9b4SRoger Pau Monne #include <linux/msi.h> 94892c9b4SRoger Pau Monne #endif 10f87e4cacSJeremy Fitzhardinge 11f87e4cacSJeremy Fitzhardinge #include <xen/interface/event_channel.h> 12f87e4cacSJeremy Fitzhardinge #include <asm/xen/hypercall.h> 13e849c3e9SIsaku Yamahata #include <asm/xen/events.h> 14e46cdb66SJeremy Fitzhardinge 150dc0064aSDavid Vrabel unsigned xen_evtchn_nr_channels(void); 160dc0064aSDavid Vrabel 170102e4efSYan Yankovskyi int bind_evtchn_to_irq(evtchn_port_t evtchn); 180102e4efSYan Yankovskyi int bind_evtchn_to_irqhandler(evtchn_port_t evtchn, 19f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 20e46cdb66SJeremy Fitzhardinge unsigned long irqflags, const char *devname, 21e46cdb66SJeremy Fitzhardinge void *dev_id); 2277bb3dfdSDavid Vrabel int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); 23e46cdb66SJeremy Fitzhardinge int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 24f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 25f87e4cacSJeremy Fitzhardinge unsigned long irqflags, const char *devname, 26f87e4cacSJeremy Fitzhardinge void *dev_id); 27f87e4cacSJeremy Fitzhardinge int bind_ipi_to_irqhandler(enum ipi_vector ipi, 28f87e4cacSJeremy Fitzhardinge unsigned int cpu, 29f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 30f87e4cacSJeremy Fitzhardinge unsigned long irqflags, 31f87e4cacSJeremy Fitzhardinge const char *devname, 32f87e4cacSJeremy Fitzhardinge void *dev_id); 33854072ddSJuergen Gross int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, 340102e4efSYan Yankovskyi evtchn_port_t remote_port); 352e820f58SIan Campbell int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 360102e4efSYan Yankovskyi evtchn_port_t remote_port, 372e820f58SIan Campbell irq_handler_t handler, 382e820f58SIan Campbell unsigned long irqflags, 392e820f58SIan Campbell const char *devname, 402e820f58SIan Campbell void *dev_id); 41e46cdb66SJeremy Fitzhardinge 42e46cdb66SJeremy Fitzhardinge /* 43e46cdb66SJeremy Fitzhardinge * Common unbind function for all event sources. Takes IRQ to unbind from. 44e46cdb66SJeremy Fitzhardinge * Automatically closes the underlying event channel (even for bindings 45e46cdb66SJeremy Fitzhardinge * made with bind_evtchn_to_irqhandler()). 46e46cdb66SJeremy Fitzhardinge */ 47e46cdb66SJeremy Fitzhardinge void unbind_from_irqhandler(unsigned int irq, void *dev_id); 48e46cdb66SJeremy Fitzhardinge 496ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX 506ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT 516ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN 526ccecb0fSDavid Vrabel int xen_set_irq_priority(unsigned irq, unsigned priority); 536ccecb0fSDavid Vrabel 54420eb554SDaniel De Graaf /* 55420eb554SDaniel De Graaf * Allow extra references to event channels exposed to userspace by evtchn 56420eb554SDaniel De Graaf */ 570102e4efSYan Yankovskyi int evtchn_make_refcounted(evtchn_port_t evtchn); 580102e4efSYan Yankovskyi int evtchn_get(evtchn_port_t evtchn); 590102e4efSYan Yankovskyi void evtchn_put(evtchn_port_t evtchn); 60420eb554SDaniel De Graaf 61f87e4cacSJeremy Fitzhardinge void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 620102e4efSYan Yankovskyi void rebind_evtchn_irq(evtchn_port_t evtchn, int irq); 63bce5963bSJuergen Gross int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu); 64f87e4cacSJeremy Fitzhardinge 650102e4efSYan Yankovskyi static inline void notify_remote_via_evtchn(evtchn_port_t port) 66e46cdb66SJeremy Fitzhardinge { 67e46cdb66SJeremy Fitzhardinge struct evtchn_send send = { .port = port }; 68e46cdb66SJeremy Fitzhardinge (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 69e46cdb66SJeremy Fitzhardinge } 70e46cdb66SJeremy Fitzhardinge 7176465b2dSIan Campbell void notify_remote_via_irq(int irq); 720e91398fSJeremy Fitzhardinge 7376465b2dSIan Campbell void xen_irq_resume(void); 740e91398fSJeremy Fitzhardinge 752d9e1e2fSJeremy Fitzhardinge /* Clear an irq's pending state, in preparation for polling on it */ 762d9e1e2fSJeremy Fitzhardinge void xen_clear_irq_pending(int irq); 77168d2f46SJeremy Fitzhardinge void xen_set_irq_pending(int irq); 78168d2f46SJeremy Fitzhardinge bool xen_test_irq_pending(int irq); 792d9e1e2fSJeremy Fitzhardinge 802d9e1e2fSJeremy Fitzhardinge /* Poll waiting for an irq to become pending. In the usual case, the 812d9e1e2fSJeremy Fitzhardinge irq will be disabled so it won't deliver an interrupt. */ 822d9e1e2fSJeremy Fitzhardinge void xen_poll_irq(int irq); 832d9e1e2fSJeremy Fitzhardinge 84d9a8814fSKonrad Rzeszutek Wilk /* Poll waiting for an irq to become pending with a timeout. In the usual case, 85d9a8814fSKonrad Rzeszutek Wilk * the irq will be disabled so it won't deliver an interrupt. */ 86d9a8814fSKonrad Rzeszutek Wilk void xen_poll_irq_timeout(int irq, u64 timeout); 87d9a8814fSKonrad Rzeszutek Wilk 88d4c04536SIan Campbell /* Determine the IRQ which is bound to an event channel */ 890102e4efSYan Yankovskyi unsigned int irq_from_evtchn(evtchn_port_t evtchn); 909a489f45SDavid Vrabel int irq_from_virq(unsigned int cpu, unsigned int virq); 910102e4efSYan Yankovskyi evtchn_port_t evtchn_from_irq(unsigned irq); 92d4c04536SIan Campbell 9328c11b0fSJuergen Gross #ifdef CONFIG_XEN_PVHVM 9438e20b07SSheng Yang /* Xen HVM evtchn vector callback */ 9576465b2dSIan Campbell void xen_hvm_callback_vector(void); 96cf910e83SSeiji Aguchi #ifdef CONFIG_TRACING 97cf910e83SSeiji Aguchi #define trace_xen_hvm_callback_vector xen_hvm_callback_vector 98cf910e83SSeiji Aguchi #endif 9928c11b0fSJuergen Gross #endif 10038e20b07SSheng Yang int xen_set_callback_via(uint64_t via); 10138e20b07SSheng Yang void xen_evtchn_do_upcall(struct pt_regs *regs); 10238e20b07SSheng Yang void xen_hvm_evtchn_do_upcall(void); 10338e20b07SSheng Yang 104f4d0635bSIan Campbell /* Bind a pirq for a physical interrupt to an irq. */ 105f4d0635bSIan Campbell int xen_bind_pirq_gsi_to_irq(unsigned gsi, 106f4d0635bSIan Campbell unsigned pirq, int shareable, char *name); 107f731e3efSQing He 108f731e3efSQing He #ifdef CONFIG_PCI_MSI 109f4d0635bSIan Campbell /* Allocate a pirq for a MSI style physical interrupt. */ 110bf480d95SIan Campbell int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 111f4d0635bSIan Campbell /* Bind an PSI pirq to an irq. */ 112bf480d95SIan Campbell int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 1134892c9b4SRoger Pau Monne int pirq, int nvec, const char *name, domid_t domid); 114f731e3efSQing He #endif 115d46a78b0SJeremy Fitzhardinge 116b5401a96SAlex Nixon /* De-allocates the above mentioned physical interrupt. */ 117b5401a96SAlex Nixon int xen_destroy_irq(int irq); 118b5401a96SAlex Nixon 119af42b8d1SStefano Stabellini /* Return irq from pirq */ 120af42b8d1SStefano Stabellini int xen_irq_from_pirq(unsigned pirq); 121af42b8d1SStefano Stabellini 122e6197accSKonrad Rzeszutek Wilk /* Return the pirq allocated to the irq. */ 123e6197accSKonrad Rzeszutek Wilk int xen_pirq_from_irq(unsigned irq); 124e6197accSKonrad Rzeszutek Wilk 12568c2c39aSStefano Stabellini /* Return the irq allocated to the gsi */ 12668c2c39aSStefano Stabellini int xen_irq_from_gsi(unsigned gsi); 12768c2c39aSStefano Stabellini 128c7c2c3a2SKonrad Rzeszutek Wilk /* Determine whether to ignore this IRQ if it is passed to a guest. */ 129c7c2c3a2SKonrad Rzeszutek Wilk int xen_test_irq_shared(int irq); 130c7c2c3a2SKonrad Rzeszutek Wilk 1310ec53ecfSStefano Stabellini /* initialize Xen IRQ subsystem */ 1320ec53ecfSStefano Stabellini void xen_init_IRQ(void); 133e46cdb66SJeremy Fitzhardinge #endif /* _XEN_EVENTS_H */ 134