Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 1 | #ifndef _XEN_EVENTS_H |
| 2 | #define _XEN_EVENTS_H |
| 3 | |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 4 | #include <linux/interrupt.h> |
Roger Pau Monne | 4892c9b | 2014-02-27 19:15:35 +0100 | [diff] [blame] | 5 | #ifdef CONFIG_PCI_MSI |
| 6 | #include <linux/msi.h> |
| 7 | #endif |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 8 | |
| 9 | #include <xen/interface/event_channel.h> |
| 10 | #include <asm/xen/hypercall.h> |
Isaku Yamahata | e849c3e | 2008-04-02 10:53:56 -0700 | [diff] [blame] | 11 | #include <asm/xen/events.h> |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 12 | |
David Vrabel | 0dc0064 | 2013-09-23 21:03:38 +0100 | [diff] [blame] | 13 | unsigned xen_evtchn_nr_channels(void); |
| 14 | |
Jeremy Fitzhardinge | b536b4b | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 15 | int bind_evtchn_to_irq(unsigned int evtchn); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 16 | int bind_evtchn_to_irqhandler(unsigned int evtchn, |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 17 | irq_handler_t handler, |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 18 | unsigned long irqflags, const char *devname, |
| 19 | void *dev_id); |
Jeremy Fitzhardinge | 4fe7d5a | 2010-09-02 16:17:06 +0100 | [diff] [blame] | 20 | int bind_virq_to_irq(unsigned int virq, unsigned int cpu); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 21 | int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 22 | irq_handler_t handler, |
| 23 | unsigned long irqflags, const char *devname, |
| 24 | void *dev_id); |
| 25 | int bind_ipi_to_irqhandler(enum ipi_vector ipi, |
| 26 | unsigned int cpu, |
| 27 | irq_handler_t handler, |
| 28 | unsigned long irqflags, |
| 29 | const char *devname, |
| 30 | void *dev_id); |
Ian Campbell | 2e820f5 | 2009-02-09 12:05:50 -0800 | [diff] [blame] | 31 | int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, |
| 32 | unsigned int remote_port, |
| 33 | irq_handler_t handler, |
| 34 | unsigned long irqflags, |
| 35 | const char *devname, |
| 36 | void *dev_id); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 37 | |
| 38 | /* |
| 39 | * Common unbind function for all event sources. Takes IRQ to unbind from. |
| 40 | * Automatically closes the underlying event channel (even for bindings |
| 41 | * made with bind_evtchn_to_irqhandler()). |
| 42 | */ |
| 43 | void unbind_from_irqhandler(unsigned int irq, void *dev_id); |
| 44 | |
David Vrabel | 6ccecb0 | 2013-09-23 12:47:26 +0100 | [diff] [blame] | 45 | #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX |
| 46 | #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT |
| 47 | #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN |
| 48 | int xen_set_irq_priority(unsigned irq, unsigned priority); |
| 49 | |
Daniel De Graaf | 420eb55 | 2011-10-27 17:58:47 -0400 | [diff] [blame] | 50 | /* |
| 51 | * Allow extra references to event channels exposed to userspace by evtchn |
| 52 | */ |
| 53 | int evtchn_make_refcounted(unsigned int evtchn); |
| 54 | int evtchn_get(unsigned int evtchn); |
| 55 | void evtchn_put(unsigned int evtchn); |
| 56 | |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 57 | void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); |
Jeremy Fitzhardinge | eb1e305 | 2008-05-26 23:31:23 +0100 | [diff] [blame] | 58 | void rebind_evtchn_irq(int evtchn, int irq); |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 59 | |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 60 | static inline void notify_remote_via_evtchn(int port) |
| 61 | { |
| 62 | struct evtchn_send send = { .port = port }; |
| 63 | (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); |
| 64 | } |
| 65 | |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 66 | void notify_remote_via_irq(int irq); |
Jeremy Fitzhardinge | 0e91398 | 2008-05-26 23:31:27 +0100 | [diff] [blame] | 67 | |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 68 | void xen_irq_resume(void); |
Jeremy Fitzhardinge | 0e91398 | 2008-05-26 23:31:27 +0100 | [diff] [blame] | 69 | |
Jeremy Fitzhardinge | 2d9e1e2 | 2008-07-07 12:07:53 -0700 | [diff] [blame] | 70 | /* Clear an irq's pending state, in preparation for polling on it */ |
| 71 | void xen_clear_irq_pending(int irq); |
Jeremy Fitzhardinge | 168d2f4 | 2008-08-20 17:02:18 -0700 | [diff] [blame] | 72 | void xen_set_irq_pending(int irq); |
| 73 | bool xen_test_irq_pending(int irq); |
Jeremy Fitzhardinge | 2d9e1e2 | 2008-07-07 12:07:53 -0700 | [diff] [blame] | 74 | |
| 75 | /* Poll waiting for an irq to become pending. In the usual case, the |
| 76 | irq will be disabled so it won't deliver an interrupt. */ |
| 77 | void xen_poll_irq(int irq); |
| 78 | |
Konrad Rzeszutek Wilk | d9a8814 | 2009-11-05 16:33:09 -0500 | [diff] [blame] | 79 | /* Poll waiting for an irq to become pending with a timeout. In the usual case, |
| 80 | * the irq will be disabled so it won't deliver an interrupt. */ |
| 81 | void xen_poll_irq_timeout(int irq, u64 timeout); |
| 82 | |
Ian Campbell | d4c0453 | 2009-02-06 19:20:31 -0800 | [diff] [blame] | 83 | /* Determine the IRQ which is bound to an event channel */ |
| 84 | unsigned irq_from_evtchn(unsigned int evtchn); |
David Vrabel | 9a489f4 | 2013-03-13 15:29:25 +0000 | [diff] [blame] | 85 | int irq_from_virq(unsigned int cpu, unsigned int virq); |
| 86 | unsigned int evtchn_from_irq(unsigned irq); |
Ian Campbell | d4c0453 | 2009-02-06 19:20:31 -0800 | [diff] [blame] | 87 | |
Sheng Yang | 38e20b0 | 2010-05-14 12:40:51 +0100 | [diff] [blame] | 88 | /* Xen HVM evtchn vector callback */ |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 89 | void xen_hvm_callback_vector(void); |
Seiji Aguchi | cf910e8 | 2013-06-20 11:46:53 -0400 | [diff] [blame] | 90 | #ifdef CONFIG_TRACING |
| 91 | #define trace_xen_hvm_callback_vector xen_hvm_callback_vector |
| 92 | #endif |
Sheng Yang | 38e20b0 | 2010-05-14 12:40:51 +0100 | [diff] [blame] | 93 | extern int xen_have_vector_callback; |
| 94 | int xen_set_callback_via(uint64_t via); |
| 95 | void xen_evtchn_do_upcall(struct pt_regs *regs); |
| 96 | void xen_hvm_evtchn_do_upcall(void); |
| 97 | |
Ian Campbell | f4d0635 | 2011-03-10 16:08:07 +0000 | [diff] [blame] | 98 | /* Bind a pirq for a physical interrupt to an irq. */ |
| 99 | int xen_bind_pirq_gsi_to_irq(unsigned gsi, |
| 100 | unsigned pirq, int shareable, char *name); |
Qing He | f731e3ef | 2010-10-11 15:30:09 +0100 | [diff] [blame] | 101 | |
| 102 | #ifdef CONFIG_PCI_MSI |
Ian Campbell | f4d0635 | 2011-03-10 16:08:07 +0000 | [diff] [blame] | 103 | /* Allocate a pirq for a MSI style physical interrupt. */ |
Ian Campbell | bf480d9 | 2011-02-18 16:43:32 +0000 | [diff] [blame] | 104 | int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); |
Ian Campbell | f4d0635 | 2011-03-10 16:08:07 +0000 | [diff] [blame] | 105 | /* Bind an PSI pirq to an irq. */ |
Ian Campbell | bf480d9 | 2011-02-18 16:43:32 +0000 | [diff] [blame] | 106 | int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, |
Roger Pau Monne | 4892c9b | 2014-02-27 19:15:35 +0100 | [diff] [blame] | 107 | int pirq, int nvec, const char *name, domid_t domid); |
Qing He | f731e3ef | 2010-10-11 15:30:09 +0100 | [diff] [blame] | 108 | #endif |
Jeremy Fitzhardinge | d46a78b | 2010-10-01 12:20:09 -0400 | [diff] [blame] | 109 | |
Alex Nixon | b5401a9 | 2010-03-18 16:31:34 -0400 | [diff] [blame] | 110 | /* De-allocates the above mentioned physical interrupt. */ |
| 111 | int xen_destroy_irq(int irq); |
| 112 | |
Stefano Stabellini | af42b8d | 2010-12-01 14:51:44 +0000 | [diff] [blame] | 113 | /* Return irq from pirq */ |
| 114 | int xen_irq_from_pirq(unsigned pirq); |
| 115 | |
Konrad Rzeszutek Wilk | e6197ac | 2011-02-24 14:20:12 -0500 | [diff] [blame] | 116 | /* Return the pirq allocated to the irq. */ |
| 117 | int xen_pirq_from_irq(unsigned irq); |
| 118 | |
Stefano Stabellini | 68c2c39 | 2012-05-21 16:54:10 +0100 | [diff] [blame] | 119 | /* Return the irq allocated to the gsi */ |
| 120 | int xen_irq_from_gsi(unsigned gsi); |
| 121 | |
Konrad Rzeszutek Wilk | c7c2c3a | 2010-11-08 14:26:36 -0500 | [diff] [blame] | 122 | /* Determine whether to ignore this IRQ if it is passed to a guest. */ |
| 123 | int xen_test_irq_shared(int irq); |
| 124 | |
Stefano Stabellini | 0ec53ec | 2012-09-14 13:37:32 +0000 | [diff] [blame] | 125 | /* initialize Xen IRQ subsystem */ |
| 126 | void xen_init_IRQ(void); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 127 | #endif /* _XEN_EVENTS_H */ |