mirror of
https://github.com/torvalds/linux.git
synced 2024-12-02 09:01:34 +00:00
f2fa0e5e9f
In order to support the possibility of per-device event channel settings (e.g. lateeoi spurious event thresholds) add a xenbus device pointer to struct irq_info() and modify the related event channel binding interfaces to take the pointer to the xenbus device as a parameter instead of the domain id of the other side. While at it remove the stale prototype of bind_evtchn_to_irq_lateeoi(). Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Paul Durrant <paul@xen.org> Signed-off-by: David S. Miller <davem@davemloft.net>
141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _XEN_EVENTS_H
|
|
#define _XEN_EVENTS_H
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#ifdef CONFIG_PCI_MSI
|
|
#include <linux/msi.h>
|
|
#endif
|
|
|
|
#include <xen/interface/event_channel.h>
|
|
#include <asm/xen/hypercall.h>
|
|
#include <asm/xen/events.h>
|
|
|
|
struct xenbus_device;
|
|
|
|
unsigned xen_evtchn_nr_channels(void);
|
|
|
|
int bind_evtchn_to_irq(evtchn_port_t evtchn);
|
|
int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
|
|
irq_handler_t handler,
|
|
unsigned long irqflags, const char *devname,
|
|
void *dev_id);
|
|
int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
|
|
irq_handler_t handler,
|
|
unsigned long irqflags, const char *devname,
|
|
void *dev_id);
|
|
int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
|
|
int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
|
|
irq_handler_t handler,
|
|
unsigned long irqflags, const char *devname,
|
|
void *dev_id);
|
|
int bind_ipi_to_irqhandler(enum ipi_vector ipi,
|
|
unsigned int cpu,
|
|
irq_handler_t handler,
|
|
unsigned long irqflags,
|
|
const char *devname,
|
|
void *dev_id);
|
|
int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev,
|
|
evtchn_port_t remote_port);
|
|
int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev,
|
|
evtchn_port_t remote_port,
|
|
irq_handler_t handler,
|
|
unsigned long irqflags,
|
|
const char *devname,
|
|
void *dev_id);
|
|
|
|
/*
|
|
* Common unbind function for all event sources. Takes IRQ to unbind from.
|
|
* Automatically closes the underlying event channel (even for bindings
|
|
* made with bind_evtchn_to_irqhandler()).
|
|
*/
|
|
void unbind_from_irqhandler(unsigned int irq, void *dev_id);
|
|
|
|
/*
|
|
* Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
|
|
* functions above.
|
|
*/
|
|
void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
|
|
/* Signal an event was spurious, i.e. there was no action resulting from it. */
|
|
#define XEN_EOI_FLAG_SPURIOUS 0x00000001
|
|
|
|
#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
|
|
#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
|
|
#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
|
|
int xen_set_irq_priority(unsigned irq, unsigned priority);
|
|
|
|
/*
|
|
* Allow extra references to event channels exposed to userspace by evtchn
|
|
*/
|
|
int evtchn_make_refcounted(evtchn_port_t evtchn);
|
|
int evtchn_get(evtchn_port_t evtchn);
|
|
void evtchn_put(evtchn_port_t evtchn);
|
|
|
|
void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
|
|
void rebind_evtchn_irq(evtchn_port_t evtchn, int irq);
|
|
int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu);
|
|
|
|
static inline void notify_remote_via_evtchn(evtchn_port_t port)
|
|
{
|
|
struct evtchn_send send = { .port = port };
|
|
(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
|
|
}
|
|
|
|
void notify_remote_via_irq(int irq);
|
|
|
|
void xen_irq_resume(void);
|
|
|
|
/* Clear an irq's pending state, in preparation for polling on it */
|
|
void xen_clear_irq_pending(int irq);
|
|
void xen_set_irq_pending(int irq);
|
|
bool xen_test_irq_pending(int irq);
|
|
|
|
/* Poll waiting for an irq to become pending. In the usual case, the
|
|
irq will be disabled so it won't deliver an interrupt. */
|
|
void xen_poll_irq(int irq);
|
|
|
|
/* Poll waiting for an irq to become pending with a timeout. In the usual case,
|
|
* the irq will be disabled so it won't deliver an interrupt. */
|
|
void xen_poll_irq_timeout(int irq, u64 timeout);
|
|
|
|
/* Determine the IRQ which is bound to an event channel */
|
|
unsigned int irq_from_evtchn(evtchn_port_t evtchn);
|
|
int irq_from_virq(unsigned int cpu, unsigned int virq);
|
|
evtchn_port_t evtchn_from_irq(unsigned irq);
|
|
|
|
int xen_set_callback_via(uint64_t via);
|
|
void xen_evtchn_do_upcall(struct pt_regs *regs);
|
|
void xen_hvm_evtchn_do_upcall(void);
|
|
|
|
/* Bind a pirq for a physical interrupt to an irq. */
|
|
int xen_bind_pirq_gsi_to_irq(unsigned gsi,
|
|
unsigned pirq, int shareable, char *name);
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
/* Allocate a pirq for a MSI style physical interrupt. */
|
|
int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
|
|
/* Bind an PSI pirq to an irq. */
|
|
int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
|
|
int pirq, int nvec, const char *name, domid_t domid);
|
|
#endif
|
|
|
|
/* De-allocates the above mentioned physical interrupt. */
|
|
int xen_destroy_irq(int irq);
|
|
|
|
/* Return irq from pirq */
|
|
int xen_irq_from_pirq(unsigned pirq);
|
|
|
|
/* Return the pirq allocated to the irq. */
|
|
int xen_pirq_from_irq(unsigned irq);
|
|
|
|
/* Return the irq allocated to the gsi */
|
|
int xen_irq_from_gsi(unsigned gsi);
|
|
|
|
/* Determine whether to ignore this IRQ if it is passed to a guest. */
|
|
int xen_test_irq_shared(int irq);
|
|
|
|
/* initialize Xen IRQ subsystem */
|
|
void xen_init_IRQ(void);
|
|
#endif /* _XEN_EVENTS_H */
|