Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 2 | #ifndef _XEN_EVENTS_H |
| 3 | #define _XEN_EVENTS_H |
| 4 | |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 5 | #include <linux/interrupt.h> |
Juergen Gross | 93774aa | 2019-06-21 20:47:03 +0200 | [diff] [blame] | 6 | #include <linux/irq.h> |
Roger Pau Monne | 4892c9b | 2014-02-27 19:15:35 +0100 | [diff] [blame] | 7 | #ifdef CONFIG_PCI_MSI |
| 8 | #include <linux/msi.h> |
| 9 | #endif |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 10 | |
| 11 | #include <xen/interface/event_channel.h> |
| 12 | #include <asm/xen/hypercall.h> |
Isaku Yamahata | e849c3e | 2008-04-02 10:53:56 -0700 | [diff] [blame] | 13 | #include <asm/xen/events.h> |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 14 | |
David Vrabel | 0dc0064 | 2013-09-23 21:03:38 +0100 | [diff] [blame] | 15 | unsigned xen_evtchn_nr_channels(void); |
| 16 | |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 17 | int bind_evtchn_to_irq(evtchn_port_t evtchn); |
| 18 | int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn); |
| 19 | int bind_evtchn_to_irqhandler(evtchn_port_t evtchn, |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 20 | irq_handler_t handler, |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 21 | unsigned long irqflags, const char *devname, |
| 22 | void *dev_id); |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 23 | int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn, |
| 24 | irq_handler_t handler, |
| 25 | unsigned long irqflags, const char *devname, |
| 26 | void *dev_id); |
David Vrabel | 77bb3df | 2015-05-19 18:40:49 +0100 | [diff] [blame] | 27 | int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 28 | int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 29 | irq_handler_t handler, |
| 30 | unsigned long irqflags, const char *devname, |
| 31 | void *dev_id); |
| 32 | int bind_ipi_to_irqhandler(enum ipi_vector ipi, |
| 33 | unsigned int cpu, |
| 34 | irq_handler_t handler, |
| 35 | unsigned long irqflags, |
| 36 | const char *devname, |
| 37 | void *dev_id); |
Juergen Gross | 854072d | 2014-08-28 06:44:09 +0200 | [diff] [blame] | 38 | int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 39 | evtchn_port_t remote_port); |
| 40 | int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain, |
| 41 | evtchn_port_t remote_port); |
Ian Campbell | 2e820f5 | 2009-02-09 12:05:50 -0800 | [diff] [blame] | 42 | int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 43 | evtchn_port_t remote_port, |
Ian Campbell | 2e820f5 | 2009-02-09 12:05:50 -0800 | [diff] [blame] | 44 | irq_handler_t handler, |
| 45 | unsigned long irqflags, |
| 46 | const char *devname, |
| 47 | void *dev_id); |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 48 | int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain, |
| 49 | evtchn_port_t remote_port, |
| 50 | irq_handler_t handler, |
| 51 | unsigned long irqflags, |
| 52 | const char *devname, |
| 53 | void *dev_id); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 54 | |
| 55 | /* |
| 56 | * Common unbind function for all event sources. Takes IRQ to unbind from. |
| 57 | * Automatically closes the underlying event channel (even for bindings |
| 58 | * made with bind_evtchn_to_irqhandler()). |
| 59 | */ |
| 60 | void unbind_from_irqhandler(unsigned int irq, void *dev_id); |
| 61 | |
Juergen Gross | b454e8e | 2020-11-03 15:29:02 +0100 | [diff] [blame] | 62 | /* |
| 63 | * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi |
| 64 | * functions above. |
| 65 | */ |
| 66 | void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags); |
| 67 | /* Signal an event was spurious, i.e. there was no action resulting from it. */ |
| 68 | #define XEN_EOI_FLAG_SPURIOUS 0x00000001 |
| 69 | |
David Vrabel | 6ccecb0 | 2013-09-23 12:47:26 +0100 | [diff] [blame] | 70 | #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX |
| 71 | #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT |
| 72 | #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN |
| 73 | int xen_set_irq_priority(unsigned irq, unsigned priority); |
| 74 | |
Daniel De Graaf | 420eb55 | 2011-10-27 17:58:47 -0400 | [diff] [blame] | 75 | /* |
| 76 | * Allow extra references to event channels exposed to userspace by evtchn |
| 77 | */ |
| 78 | int evtchn_make_refcounted(unsigned int evtchn); |
| 79 | int evtchn_get(unsigned int evtchn); |
| 80 | void evtchn_put(unsigned int evtchn); |
| 81 | |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 82 | void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); |
Jeremy Fitzhardinge | eb1e305 | 2008-05-26 23:31:23 +0100 | [diff] [blame] | 83 | void rebind_evtchn_irq(int evtchn, int irq); |
Juergen Gross | 93774aa | 2019-06-21 20:47:03 +0200 | [diff] [blame] | 84 | int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu); |
Jeremy Fitzhardinge | f87e4ca | 2007-07-17 18:37:06 -0700 | [diff] [blame] | 85 | |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 86 | static inline void notify_remote_via_evtchn(int port) |
| 87 | { |
| 88 | struct evtchn_send send = { .port = port }; |
| 89 | (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); |
| 90 | } |
| 91 | |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 92 | void notify_remote_via_irq(int irq); |
Jeremy Fitzhardinge | 0e91398 | 2008-05-26 23:31:27 +0100 | [diff] [blame] | 93 | |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 94 | void xen_irq_resume(void); |
Jeremy Fitzhardinge | 0e91398 | 2008-05-26 23:31:27 +0100 | [diff] [blame] | 95 | |
Jeremy Fitzhardinge | 2d9e1e2 | 2008-07-07 12:07:53 -0700 | [diff] [blame] | 96 | /* Clear an irq's pending state, in preparation for polling on it */ |
| 97 | void xen_clear_irq_pending(int irq); |
Jeremy Fitzhardinge | 168d2f4 | 2008-08-20 17:02:18 -0700 | [diff] [blame] | 98 | void xen_set_irq_pending(int irq); |
| 99 | bool xen_test_irq_pending(int irq); |
Jeremy Fitzhardinge | 2d9e1e2 | 2008-07-07 12:07:53 -0700 | [diff] [blame] | 100 | |
| 101 | /* Poll waiting for an irq to become pending. In the usual case, the |
| 102 | irq will be disabled so it won't deliver an interrupt. */ |
| 103 | void xen_poll_irq(int irq); |
| 104 | |
Konrad Rzeszutek Wilk | d9a8814 | 2009-11-05 16:33:09 -0500 | [diff] [blame] | 105 | /* Poll waiting for an irq to become pending with a timeout. In the usual case, |
| 106 | * the irq will be disabled so it won't deliver an interrupt. */ |
| 107 | void xen_poll_irq_timeout(int irq, u64 timeout); |
| 108 | |
Ian Campbell | d4c0453 | 2009-02-06 19:20:31 -0800 | [diff] [blame] | 109 | /* Determine the IRQ which is bound to an event channel */ |
| 110 | unsigned irq_from_evtchn(unsigned int evtchn); |
David Vrabel | 9a489f4 | 2013-03-13 15:29:25 +0000 | [diff] [blame] | 111 | int irq_from_virq(unsigned int cpu, unsigned int virq); |
| 112 | unsigned int evtchn_from_irq(unsigned irq); |
Ian Campbell | d4c0453 | 2009-02-06 19:20:31 -0800 | [diff] [blame] | 113 | |
Sheng Yang | 38e20b0 | 2010-05-14 12:40:51 +0100 | [diff] [blame] | 114 | /* Xen HVM evtchn vector callback */ |
Ian Campbell | 76465b2 | 2011-03-10 16:08:05 +0000 | [diff] [blame] | 115 | void xen_hvm_callback_vector(void); |
Seiji Aguchi | cf910e8 | 2013-06-20 11:46:53 -0400 | [diff] [blame] | 116 | #ifdef CONFIG_TRACING |
| 117 | #define trace_xen_hvm_callback_vector xen_hvm_callback_vector |
| 118 | #endif |
Sheng Yang | 38e20b0 | 2010-05-14 12:40:51 +0100 | [diff] [blame] | 119 | int xen_set_callback_via(uint64_t via); |
| 120 | void xen_evtchn_do_upcall(struct pt_regs *regs); |
| 121 | void xen_hvm_evtchn_do_upcall(void); |
| 122 | |
Ian Campbell | f4d0635 | 2011-03-10 16:08:07 +0000 | [diff] [blame] | 123 | /* Bind a pirq for a physical interrupt to an irq. */ |
| 124 | int xen_bind_pirq_gsi_to_irq(unsigned gsi, |
| 125 | unsigned pirq, int shareable, char *name); |
Qing He | f731e3ef | 2010-10-11 15:30:09 +0100 | [diff] [blame] | 126 | |
| 127 | #ifdef CONFIG_PCI_MSI |
Ian Campbell | f4d0635 | 2011-03-10 16:08:07 +0000 | [diff] [blame] | 128 | /* Allocate a pirq for a MSI style physical interrupt. */ |
Ian Campbell | bf480d9 | 2011-02-18 16:43:32 +0000 | [diff] [blame] | 129 | 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] | 130 | /* Bind an PSI pirq to an irq. */ |
Ian Campbell | bf480d9 | 2011-02-18 16:43:32 +0000 | [diff] [blame] | 131 | 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] | 132 | int pirq, int nvec, const char *name, domid_t domid); |
Qing He | f731e3ef | 2010-10-11 15:30:09 +0100 | [diff] [blame] | 133 | #endif |
Jeremy Fitzhardinge | d46a78b | 2010-10-01 12:20:09 -0400 | [diff] [blame] | 134 | |
Alex Nixon | b5401a9 | 2010-03-18 16:31:34 -0400 | [diff] [blame] | 135 | /* De-allocates the above mentioned physical interrupt. */ |
| 136 | int xen_destroy_irq(int irq); |
| 137 | |
Stefano Stabellini | af42b8d | 2010-12-01 14:51:44 +0000 | [diff] [blame] | 138 | /* Return irq from pirq */ |
| 139 | int xen_irq_from_pirq(unsigned pirq); |
| 140 | |
Konrad Rzeszutek Wilk | e6197ac | 2011-02-24 14:20:12 -0500 | [diff] [blame] | 141 | /* Return the pirq allocated to the irq. */ |
| 142 | int xen_pirq_from_irq(unsigned irq); |
| 143 | |
Stefano Stabellini | 68c2c39 | 2012-05-21 16:54:10 +0100 | [diff] [blame] | 144 | /* Return the irq allocated to the gsi */ |
| 145 | int xen_irq_from_gsi(unsigned gsi); |
| 146 | |
Konrad Rzeszutek Wilk | c7c2c3a | 2010-11-08 14:26:36 -0500 | [diff] [blame] | 147 | /* Determine whether to ignore this IRQ if it is passed to a guest. */ |
| 148 | int xen_test_irq_shared(int irq); |
| 149 | |
Stefano Stabellini | 0ec53ec | 2012-09-14 13:37:32 +0000 | [diff] [blame] | 150 | /* initialize Xen IRQ subsystem */ |
| 151 | void xen_init_IRQ(void); |
Jeremy Fitzhardinge | e46cdb6 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 152 | #endif /* _XEN_EVENTS_H */ |