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" 2138559979SEric Auger #include "qemu/event_notifier.h" 2238559979SEric Auger #include "qemu/queue.h" 23db1015e9SEduardo Habkost #include "qom/object.h" 240ea2730bSEric Auger 250ea2730bSEric Auger #define TYPE_VFIO_PLATFORM "vfio-platform" 260ea2730bSEric Auger 2738559979SEric Auger enum { 2838559979SEric Auger VFIO_IRQ_INACTIVE = 0, 2938559979SEric Auger VFIO_IRQ_PENDING = 1, 3038559979SEric Auger VFIO_IRQ_ACTIVE = 2, 3138559979SEric Auger /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */ 3238559979SEric Auger }; 3338559979SEric Auger 3438559979SEric Auger typedef struct VFIOINTp { 3538559979SEric Auger QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */ 3638559979SEric Auger QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */ 37a22313deSEric Auger EventNotifier *interrupt; /* eventfd triggered on interrupt */ 38a22313deSEric Auger EventNotifier *unmask; /* eventfd for unmask on QEMU bypass */ 3938559979SEric Auger qemu_irq qemuirq; 4038559979SEric Auger struct VFIOPlatformDevice *vdev; /* back pointer to device */ 4138559979SEric Auger int state; /* inactive, pending, active */ 4238559979SEric Auger uint8_t pin; /* index */ 4338559979SEric Auger uint32_t flags; /* IRQ info flags */ 44fb5f8164SEric Auger bool kvm_accel; /* set when QEMU bypass through KVM enabled */ 4538559979SEric Auger } VFIOINTp; 4638559979SEric Auger 4738559979SEric Auger /* function type for user side eventfd handler */ 4838559979SEric Auger typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp); 4938559979SEric Auger 50db1015e9SEduardo Habkost struct VFIOPlatformDevice { 510ea2730bSEric Auger SysBusDevice sbdev; 520ea2730bSEric Auger VFIODevice vbasedev; /* not a QOM object */ 530ea2730bSEric Auger VFIORegion **regions; 5438559979SEric Auger QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */ 5538559979SEric Auger /* queue of pending IRQs */ 56b58deb34SPaolo Bonzini QSIMPLEQ_HEAD(, VFIOINTp) pending_intp_queue; 57a49531ebSEric Auger char *compat; /* DT compatible values, separated by NUL */ 58a49531ebSEric Auger unsigned int num_compat; /* number of compatible values */ 5938559979SEric Auger uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 6038559979SEric Auger QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */ 6138559979SEric Auger QemuMutex intp_mutex; /* protect the intp_list IRQ state */ 62fb5f8164SEric Auger bool irqfd_allowed; /* debug option to force irqfd on/off */ 63db1015e9SEduardo Habkost }; 64db1015e9SEduardo Habkost typedef struct VFIOPlatformDevice VFIOPlatformDevice; 650ea2730bSEric Auger 66db1015e9SEduardo Habkost struct VFIOPlatformDeviceClass { 670ea2730bSEric Auger /*< private >*/ 680ea2730bSEric Auger SysBusDeviceClass parent_class; 690ea2730bSEric Auger /*< public >*/ 70db1015e9SEduardo Habkost }; 71db1015e9SEduardo Habkost typedef struct VFIOPlatformDeviceClass VFIOPlatformDeviceClass; 720ea2730bSEric Auger 73*8110fa1dSEduardo Habkost DECLARE_OBJ_CHECKERS(VFIOPlatformDevice, VFIOPlatformDeviceClass, 74*8110fa1dSEduardo Habkost VFIO_PLATFORM_DEVICE, TYPE_VFIO_PLATFORM) 750ea2730bSEric Auger 760ea2730bSEric Auger #endif /* HW_VFIO_VFIO_PLATFORM_H */ 77