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