1 /* 2 * vfio based device assignment support - platform devices 3 * 4 * Copyright Linaro Limited, 2014 5 * 6 * Authors: 7 * Kim Phillips <kim.phillips@linaro.org> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 * Based on vfio based PCI device assignment support: 13 * Copyright Red Hat, Inc. 2012 14 */ 15 16 #ifndef HW_VFIO_VFIO_PLATFORM_H 17 #define HW_VFIO_VFIO_PLATFORM_H 18 19 #include "hw/sysbus.h" 20 #include "hw/vfio/vfio-common.h" 21 #include "qemu/event_notifier.h" 22 #include "qemu/queue.h" 23 24 #define TYPE_VFIO_PLATFORM "vfio-platform" 25 26 enum { 27 VFIO_IRQ_INACTIVE = 0, 28 VFIO_IRQ_PENDING = 1, 29 VFIO_IRQ_ACTIVE = 2, 30 /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */ 31 }; 32 33 typedef struct VFIOINTp { 34 QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */ 35 QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */ 36 EventNotifier *interrupt; /* eventfd triggered on interrupt */ 37 EventNotifier *unmask; /* eventfd for unmask on QEMU bypass */ 38 qemu_irq qemuirq; 39 struct VFIOPlatformDevice *vdev; /* back pointer to device */ 40 int state; /* inactive, pending, active */ 41 uint8_t pin; /* index */ 42 uint32_t flags; /* IRQ info flags */ 43 bool kvm_accel; /* set when QEMU bypass through KVM enabled */ 44 } VFIOINTp; 45 46 /* function type for user side eventfd handler */ 47 typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp); 48 49 typedef struct VFIOPlatformDevice { 50 SysBusDevice sbdev; 51 VFIODevice vbasedev; /* not a QOM object */ 52 VFIORegion **regions; 53 QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */ 54 /* queue of pending IRQs */ 55 QSIMPLEQ_HEAD(, VFIOINTp) pending_intp_queue; 56 char *compat; /* DT compatible values, separated by NUL */ 57 unsigned int num_compat; /* number of compatible values */ 58 uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 59 QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */ 60 QemuMutex intp_mutex; /* protect the intp_list IRQ state */ 61 bool irqfd_allowed; /* debug option to force irqfd on/off */ 62 } VFIOPlatformDevice; 63 64 typedef struct VFIOPlatformDeviceClass { 65 /*< private >*/ 66 SysBusDeviceClass parent_class; 67 /*< public >*/ 68 } VFIOPlatformDeviceClass; 69 70 #define VFIO_PLATFORM_DEVICE(obj) \ 71 OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM) 72 #define VFIO_PLATFORM_DEVICE_CLASS(klass) \ 73 OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM) 74 #define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \ 75 OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM) 76 77 #endif /* HW_VFIO_VFIO_PLATFORM_H */ 78