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> 64892c9b4SRoger Pau Monne #ifdef CONFIG_PCI_MSI 74892c9b4SRoger Pau Monne #include <linux/msi.h> 84892c9b4SRoger Pau Monne #endif 9f87e4cacSJeremy Fitzhardinge 10f87e4cacSJeremy Fitzhardinge #include <xen/interface/event_channel.h> 11f87e4cacSJeremy Fitzhardinge #include <asm/xen/hypercall.h> 12e849c3e9SIsaku Yamahata #include <asm/xen/events.h> 13e46cdb66SJeremy Fitzhardinge 140dc0064aSDavid Vrabel unsigned xen_evtchn_nr_channels(void); 150dc0064aSDavid Vrabel 16b536b4b9SJeremy Fitzhardinge int bind_evtchn_to_irq(unsigned int evtchn); 17e46cdb66SJeremy Fitzhardinge int bind_evtchn_to_irqhandler(unsigned int evtchn, 18f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 19e46cdb66SJeremy Fitzhardinge unsigned long irqflags, const char *devname, 20e46cdb66SJeremy Fitzhardinge void *dev_id); 2177bb3dfdSDavid Vrabel int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); 22e46cdb66SJeremy Fitzhardinge int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 23f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 24f87e4cacSJeremy Fitzhardinge unsigned long irqflags, const char *devname, 25f87e4cacSJeremy Fitzhardinge void *dev_id); 26f87e4cacSJeremy Fitzhardinge int bind_ipi_to_irqhandler(enum ipi_vector ipi, 27f87e4cacSJeremy Fitzhardinge unsigned int cpu, 28f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 29f87e4cacSJeremy Fitzhardinge unsigned long irqflags, 30f87e4cacSJeremy Fitzhardinge const char *devname, 31f87e4cacSJeremy Fitzhardinge void *dev_id); 32854072ddSJuergen Gross int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, 33854072ddSJuergen Gross unsigned int remote_port); 342e820f58SIan Campbell int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 352e820f58SIan Campbell unsigned int remote_port, 362e820f58SIan Campbell irq_handler_t handler, 372e820f58SIan Campbell unsigned long irqflags, 382e820f58SIan Campbell const char *devname, 392e820f58SIan Campbell void *dev_id); 40e46cdb66SJeremy Fitzhardinge 41e46cdb66SJeremy Fitzhardinge /* 42e46cdb66SJeremy Fitzhardinge * Common unbind function for all event sources. Takes IRQ to unbind from. 43e46cdb66SJeremy Fitzhardinge * Automatically closes the underlying event channel (even for bindings 44e46cdb66SJeremy Fitzhardinge * made with bind_evtchn_to_irqhandler()). 45e46cdb66SJeremy Fitzhardinge */ 46e46cdb66SJeremy Fitzhardinge void unbind_from_irqhandler(unsigned int irq, void *dev_id); 47e46cdb66SJeremy Fitzhardinge 486ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX 496ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT 506ccecb0fSDavid Vrabel #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN 516ccecb0fSDavid Vrabel int xen_set_irq_priority(unsigned irq, unsigned priority); 526ccecb0fSDavid Vrabel 53420eb554SDaniel De Graaf /* 54420eb554SDaniel De Graaf * Allow extra references to event channels exposed to userspace by evtchn 55420eb554SDaniel De Graaf */ 56420eb554SDaniel De Graaf int evtchn_make_refcounted(unsigned int evtchn); 57420eb554SDaniel De Graaf int evtchn_get(unsigned int evtchn); 58420eb554SDaniel De Graaf void evtchn_put(unsigned int evtchn); 59420eb554SDaniel De Graaf 60f87e4cacSJeremy Fitzhardinge void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 61eb1e305fSJeremy Fitzhardinge void rebind_evtchn_irq(int evtchn, int irq); 62c48f64abSAnoob Soman int xen_rebind_evtchn_to_cpu(int evtchn, unsigned tcpu); 63f87e4cacSJeremy Fitzhardinge 64e46cdb66SJeremy Fitzhardinge static inline void notify_remote_via_evtchn(int port) 65e46cdb66SJeremy Fitzhardinge { 66e46cdb66SJeremy Fitzhardinge struct evtchn_send send = { .port = port }; 67e46cdb66SJeremy Fitzhardinge (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 68e46cdb66SJeremy Fitzhardinge } 69e46cdb66SJeremy Fitzhardinge 7076465b2dSIan Campbell void notify_remote_via_irq(int irq); 710e91398fSJeremy Fitzhardinge 7276465b2dSIan Campbell void xen_irq_resume(void); 730e91398fSJeremy Fitzhardinge 742d9e1e2fSJeremy Fitzhardinge /* Clear an irq's pending state, in preparation for polling on it */ 752d9e1e2fSJeremy Fitzhardinge void xen_clear_irq_pending(int irq); 76168d2f46SJeremy Fitzhardinge void xen_set_irq_pending(int irq); 77168d2f46SJeremy Fitzhardinge bool xen_test_irq_pending(int irq); 782d9e1e2fSJeremy Fitzhardinge 792d9e1e2fSJeremy Fitzhardinge /* Poll waiting for an irq to become pending. In the usual case, the 802d9e1e2fSJeremy Fitzhardinge irq will be disabled so it won't deliver an interrupt. */ 812d9e1e2fSJeremy Fitzhardinge void xen_poll_irq(int irq); 822d9e1e2fSJeremy Fitzhardinge 83d9a8814fSKonrad Rzeszutek Wilk /* Poll waiting for an irq to become pending with a timeout. In the usual case, 84d9a8814fSKonrad Rzeszutek Wilk * the irq will be disabled so it won't deliver an interrupt. */ 85d9a8814fSKonrad Rzeszutek Wilk void xen_poll_irq_timeout(int irq, u64 timeout); 86d9a8814fSKonrad Rzeszutek Wilk 87d4c04536SIan Campbell /* Determine the IRQ which is bound to an event channel */ 88d4c04536SIan Campbell unsigned irq_from_evtchn(unsigned int evtchn); 899a489f45SDavid Vrabel int irq_from_virq(unsigned int cpu, unsigned int virq); 909a489f45SDavid Vrabel unsigned int evtchn_from_irq(unsigned irq); 91d4c04536SIan Campbell 9238e20b07SSheng Yang /* Xen HVM evtchn vector callback */ 9376465b2dSIan Campbell void xen_hvm_callback_vector(void); 94cf910e83SSeiji Aguchi #ifdef CONFIG_TRACING 95cf910e83SSeiji Aguchi #define trace_xen_hvm_callback_vector xen_hvm_callback_vector 96cf910e83SSeiji Aguchi #endif 9738e20b07SSheng Yang int xen_set_callback_via(uint64_t via); 9838e20b07SSheng Yang void xen_evtchn_do_upcall(struct pt_regs *regs); 9938e20b07SSheng Yang void xen_hvm_evtchn_do_upcall(void); 10038e20b07SSheng Yang 101f4d0635bSIan Campbell /* Bind a pirq for a physical interrupt to an irq. */ 102f4d0635bSIan Campbell int xen_bind_pirq_gsi_to_irq(unsigned gsi, 103f4d0635bSIan Campbell unsigned pirq, int shareable, char *name); 104f731e3efSQing He 105f731e3efSQing He #ifdef CONFIG_PCI_MSI 106f4d0635bSIan Campbell /* Allocate a pirq for a MSI style physical interrupt. */ 107bf480d95SIan Campbell int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 108f4d0635bSIan Campbell /* Bind an PSI pirq to an irq. */ 109bf480d95SIan Campbell int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 1104892c9b4SRoger Pau Monne int pirq, int nvec, const char *name, domid_t domid); 111f731e3efSQing He #endif 112d46a78b0SJeremy Fitzhardinge 113b5401a96SAlex Nixon /* De-allocates the above mentioned physical interrupt. */ 114b5401a96SAlex Nixon int xen_destroy_irq(int irq); 115b5401a96SAlex Nixon 116af42b8d1SStefano Stabellini /* Return irq from pirq */ 117af42b8d1SStefano Stabellini int xen_irq_from_pirq(unsigned pirq); 118af42b8d1SStefano Stabellini 119e6197accSKonrad Rzeszutek Wilk /* Return the pirq allocated to the irq. */ 120e6197accSKonrad Rzeszutek Wilk int xen_pirq_from_irq(unsigned irq); 121e6197accSKonrad Rzeszutek Wilk 12268c2c39aSStefano Stabellini /* Return the irq allocated to the gsi */ 12368c2c39aSStefano Stabellini int xen_irq_from_gsi(unsigned gsi); 12468c2c39aSStefano Stabellini 125c7c2c3a2SKonrad Rzeszutek Wilk /* Determine whether to ignore this IRQ if it is passed to a guest. */ 126c7c2c3a2SKonrad Rzeszutek Wilk int xen_test_irq_shared(int irq); 127c7c2c3a2SKonrad Rzeszutek Wilk 1280ec53ecfSStefano Stabellini /* initialize Xen IRQ subsystem */ 1290ec53ecfSStefano Stabellini void xen_init_IRQ(void); 130e46cdb66SJeremy Fitzhardinge #endif /* _XEN_EVENTS_H */ 131