2 * vfio based device assignment support - platform devices
4 * Copyright Linaro Limited, 2014
7 * Kim Phillips <kim.phillips@linaro.org>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Based on vfio based PCI device assignment support:
13 * Copyright Red Hat, Inc. 2012
16 #ifndef HW_VFIO_VFIO_PLATFORM_H
17 #define HW_VFIO_VFIO_PLATFORM_H
19 #include "hw/sysbus.h"
20 #include "hw/vfio/vfio-common.h"
21 #include "qemu/event_notifier.h"
22 #include "qemu/queue.h"
25 #define TYPE_VFIO_PLATFORM "vfio-platform"
28 VFIO_IRQ_INACTIVE
= 0,
31 /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
34 typedef struct VFIOINTp
{
35 QLIST_ENTRY(VFIOINTp
) next
; /* entry for IRQ list */
36 QSIMPLEQ_ENTRY(VFIOINTp
) pqnext
; /* entry for pending IRQ queue */
37 EventNotifier
*interrupt
; /* eventfd triggered on interrupt */
38 EventNotifier
*unmask
; /* eventfd for unmask on QEMU bypass */
40 struct VFIOPlatformDevice
*vdev
; /* back pointer to device */
41 int state
; /* inactive, pending, active */
42 uint8_t pin
; /* index */
43 uint32_t flags
; /* IRQ info flags */
44 bool kvm_accel
; /* set when QEMU bypass through KVM enabled */
47 /* function type for user side eventfd handler */
48 typedef void (*eventfd_user_side_handler_t
)(VFIOINTp
*intp
);
50 typedef struct VFIOPlatformDevice
{
52 VFIODevice vbasedev
; /* not a QOM object */
54 QLIST_HEAD(, VFIOINTp
) intp_list
; /* list of IRQs */
55 /* queue of pending IRQs */
56 QSIMPLEQ_HEAD(, VFIOINTp
) pending_intp_queue
;
57 char *compat
; /* DT compatible values, separated by NUL */
58 unsigned int num_compat
; /* number of compatible values */
59 uint32_t mmap_timeout
; /* delay to re-enable mmaps after interrupt */
60 QEMUTimer
*mmap_timer
; /* allows fast-path resume after IRQ hit */
61 QemuMutex intp_mutex
; /* protect the intp_list IRQ state */
62 bool irqfd_allowed
; /* debug option to force irqfd on/off */
65 typedef struct VFIOPlatformDeviceClass
{
67 SysBusDeviceClass parent_class
;
69 } VFIOPlatformDeviceClass
;
71 #define VFIO_PLATFORM_DEVICE(obj) \
72 OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
73 #define VFIO_PLATFORM_DEVICE_CLASS(klass) \
74 OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
75 #define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
76 OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
78 #endif /* HW_VFIO_VFIO_PLATFORM_H */