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author | David Vrabel <david.vrabel@citrix.com> | 2013-03-13 15:29:25 (GMT) |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 15:07:41 (GMT) |
commit | 9a489f45a155fe96b9b55fbbef2b757ef7737cfc (patch) | |
tree | 1104f50a1adaeea564344bdfe221a5edf2141077 /drivers/xen/events/events_internal.h | |
parent | d2ba3166f23baa53f5ee9c5c2ca43b42fb4e9e62 (diff) | |
download | linux-9a489f45a155fe96b9b55fbbef2b757ef7737cfc.tar.xz |
xen/events: move 2-level specific code into its own file
In preparation for alternative event channel ABIs, move all the
functions accessing the shared data structures into their own file.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/events/events_internal.h')
-rw-r--r-- | drivers/xen/events/events_internal.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h new file mode 100644 index 0000000..79ac70b --- /dev/null +++ b/drivers/xen/events/events_internal.h @@ -0,0 +1,74 @@ +/* + * Xen Event Channels (internal header) + * + * Copyright (C) 2013 Citrix Systems R&D Ltd. + * + * This source code is licensed under the GNU General Public License, + * Version 2 or later. See the file COPYING for more details. + */ +#ifndef __EVENTS_INTERNAL_H__ +#define __EVENTS_INTERNAL_H__ + +/* Interrupt types. */ +enum xen_irq_type { + IRQT_UNBOUND = 0, + IRQT_PIRQ, + IRQT_VIRQ, + IRQT_IPI, + IRQT_EVTCHN +}; + +/* + * Packed IRQ information: + * type - enum xen_irq_type + * event channel - irq->event channel mapping + * cpu - cpu this event channel is bound to + * index - type-specific information: + * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM + * guest, or GSI (real passthrough IRQ) of the device. + * VIRQ - virq number + * IPI - IPI vector + * EVTCHN - + */ +struct irq_info { + struct list_head list; + int refcnt; + enum xen_irq_type type; /* type */ + unsigned irq; + unsigned short evtchn; /* event channel */ + unsigned short cpu; /* cpu bound */ + + union { + unsigned short virq; + enum ipi_vector ipi; + struct { + unsigned short pirq; + unsigned short gsi; + unsigned char vector; + unsigned char flags; + uint16_t domid; + } pirq; + } u; +}; + +#define PIRQ_NEEDS_EOI (1 << 0) +#define PIRQ_SHAREABLE (1 << 1) + +extern int *evtchn_to_irq; + +struct irq_info *info_for_irq(unsigned irq); +unsigned cpu_from_irq(unsigned irq); +unsigned cpu_from_evtchn(unsigned int evtchn); + +void xen_evtchn_port_bind_to_cpu(struct irq_info *info, int cpu); + +void clear_evtchn(int port); +void set_evtchn(int port); +int test_evtchn(int port); +int test_and_set_mask(int port); +void mask_evtchn(int port); +void unmask_evtchn(int port); + +void xen_evtchn_handle_events(int cpu); + +#endif /* #ifndef __EVENTS_INTERNAL_H__ */ |