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 #include "qom/object.h" 24 25 #define TYPE_VFIO_PLATFORM "vfio-platform" 26 27 enum { 28 VFIO_IRQ_INACTIVE = 0, 29 VFIO_IRQ_PENDING = 1, 30 VFIO_IRQ_ACTIVE = 2, 31 /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */ 32 }; 33 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 */ 39 qemu_irq qemuirq; 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 */ 45 } VFIOINTp; 46 47 /* function type for user side eventfd handler */ 48 typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp); 49 50 struct VFIOPlatformDevice { 51 SysBusDevice sbdev; 52 VFIODevice vbasedev; /* not a QOM object */ 53 VFIORegion **regions; 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 */ 63 }; 64 typedef struct VFIOPlatformDevice VFIOPlatformDevice; 65 66 struct VFIOPlatformDeviceClass { 67 /*< private >*/ 68 SysBusDeviceClass parent_class; 69 /*< public >*/ 70 }; 71 typedef struct VFIOPlatformDeviceClass VFIOPlatformDeviceClass; 72 73 DECLARE_OBJ_CHECKERS(VFIOPlatformDevice, VFIOPlatformDeviceClass, 74 VFIO_PLATFORM_DEVICE, TYPE_VFIO_PLATFORM) 75 76 #endif /* HW_VFIO_VFIO_PLATFORM_H */ 77