qemu

FORK: QEMU emulator
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vfio-platform.h (2525B)

      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 */