78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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* vfio based device assignment support - platform devices
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*
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* Copyright Linaro Limited, 2014
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*
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* Authors:
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* Kim Phillips <kim.phillips@linaro.org>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on vfio based PCI device assignment support:
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* Copyright Red Hat, Inc. 2012
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*/
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#ifndef HW_VFIO_VFIO_PLATFORM_H
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#define HW_VFIO_VFIO_PLATFORM_H
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#include "hw/sysbus.h"
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#include "hw/vfio/vfio-common.h"
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#include "qemu/event_notifier.h"
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#include "qemu/queue.h"
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#include "hw/irq.h"
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#define TYPE_VFIO_PLATFORM "vfio-platform"
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enum {
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VFIO_IRQ_INACTIVE = 0,
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VFIO_IRQ_PENDING = 1,
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VFIO_IRQ_ACTIVE = 2,
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/* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
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};
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typedef struct VFIOINTp {
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QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
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QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
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EventNotifier *interrupt; /* eventfd triggered on interrupt */
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EventNotifier *unmask; /* eventfd for unmask on QEMU bypass */
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qemu_irq qemuirq;
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struct VFIOPlatformDevice *vdev; /* back pointer to device */
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int state; /* inactive, pending, active */
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uint8_t pin; /* index */
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uint32_t flags; /* IRQ info flags */
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bool kvm_accel; /* set when QEMU bypass through KVM enabled */
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} VFIOINTp;
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/* function type for user side eventfd handler */
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typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp);
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typedef struct VFIOPlatformDevice {
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SysBusDevice sbdev;
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VFIODevice vbasedev; /* not a QOM object */
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VFIORegion **regions;
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QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */
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/* queue of pending IRQs */
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QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue;
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char *compat; /* compatibility string */
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uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
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QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */
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QemuMutex intp_mutex; /* protect the intp_list IRQ state */
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bool irqfd_allowed; /* debug option to force irqfd on/off */
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} VFIOPlatformDevice;
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typedef struct VFIOPlatformDeviceClass {
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/*< private >*/
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SysBusDeviceClass parent_class;
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/*< public >*/
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} VFIOPlatformDeviceClass;
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#define VFIO_PLATFORM_DEVICE(obj) \
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OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
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#define VFIO_PLATFORM_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
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#define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
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#endif /*HW_VFIO_VFIO_PLATFORM_H*/
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