10ea2730bSEric Auger /* 20ea2730bSEric Auger * vfio based device assignment support - platform devices 30ea2730bSEric Auger * 40ea2730bSEric Auger * Copyright Linaro Limited, 2014 50ea2730bSEric Auger * 60ea2730bSEric Auger * Authors: 70ea2730bSEric Auger * Kim Phillips <kim.phillips@linaro.org> 80ea2730bSEric Auger * 90ea2730bSEric Auger * This work is licensed under the terms of the GNU GPL, version 2. See 100ea2730bSEric Auger * the COPYING file in the top-level directory. 110ea2730bSEric Auger * 120ea2730bSEric Auger * Based on vfio based PCI device assignment support: 130ea2730bSEric Auger * Copyright Red Hat, Inc. 2012 140ea2730bSEric Auger */ 150ea2730bSEric Auger 160ea2730bSEric Auger #ifndef HW_VFIO_VFIO_PLATFORM_H 170ea2730bSEric Auger #define HW_VFIO_VFIO_PLATFORM_H 180ea2730bSEric Auger 190ea2730bSEric Auger #include "hw/sysbus.h" 200ea2730bSEric Auger #include "hw/vfio/vfio-common.h" 21*38559979SEric Auger #include "qemu/event_notifier.h" 22*38559979SEric Auger #include "qemu/queue.h" 23*38559979SEric Auger #include "hw/irq.h" 240ea2730bSEric Auger 250ea2730bSEric Auger #define TYPE_VFIO_PLATFORM "vfio-platform" 260ea2730bSEric Auger 27*38559979SEric Auger enum { 28*38559979SEric Auger VFIO_IRQ_INACTIVE = 0, 29*38559979SEric Auger VFIO_IRQ_PENDING = 1, 30*38559979SEric Auger VFIO_IRQ_ACTIVE = 2, 31*38559979SEric Auger /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */ 32*38559979SEric Auger }; 33*38559979SEric Auger 34*38559979SEric Auger typedef struct VFIOINTp { 35*38559979SEric Auger QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */ 36*38559979SEric Auger QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */ 37*38559979SEric Auger EventNotifier interrupt; /* eventfd triggered on interrupt */ 38*38559979SEric Auger EventNotifier unmask; /* eventfd for unmask on QEMU bypass */ 39*38559979SEric Auger qemu_irq qemuirq; 40*38559979SEric Auger struct VFIOPlatformDevice *vdev; /* back pointer to device */ 41*38559979SEric Auger int state; /* inactive, pending, active */ 42*38559979SEric Auger uint8_t pin; /* index */ 43*38559979SEric Auger uint32_t flags; /* IRQ info flags */ 44*38559979SEric Auger } VFIOINTp; 45*38559979SEric Auger 46*38559979SEric Auger /* function type for user side eventfd handler */ 47*38559979SEric Auger typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp); 48*38559979SEric Auger 490ea2730bSEric Auger typedef struct VFIOPlatformDevice { 500ea2730bSEric Auger SysBusDevice sbdev; 510ea2730bSEric Auger VFIODevice vbasedev; /* not a QOM object */ 520ea2730bSEric Auger VFIORegion **regions; 53*38559979SEric Auger QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */ 54*38559979SEric Auger /* queue of pending IRQs */ 55*38559979SEric Auger QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue; 560ea2730bSEric Auger char *compat; /* compatibility string */ 57*38559979SEric Auger uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 58*38559979SEric Auger QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */ 59*38559979SEric Auger QemuMutex intp_mutex; /* protect the intp_list IRQ state */ 600ea2730bSEric Auger } VFIOPlatformDevice; 610ea2730bSEric Auger 620ea2730bSEric Auger typedef struct VFIOPlatformDeviceClass { 630ea2730bSEric Auger /*< private >*/ 640ea2730bSEric Auger SysBusDeviceClass parent_class; 650ea2730bSEric Auger /*< public >*/ 660ea2730bSEric Auger } VFIOPlatformDeviceClass; 670ea2730bSEric Auger 680ea2730bSEric Auger #define VFIO_PLATFORM_DEVICE(obj) \ 690ea2730bSEric Auger OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM) 700ea2730bSEric Auger #define VFIO_PLATFORM_DEVICE_CLASS(klass) \ 710ea2730bSEric Auger OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM) 720ea2730bSEric Auger #define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \ 730ea2730bSEric Auger OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM) 740ea2730bSEric Auger 750ea2730bSEric Auger #endif /*HW_VFIO_VFIO_PLATFORM_H*/ 76