Imported Upstream version 2.4.1upstream/2.4.1

Change-Id: I0b584f569cb0e0f4eac13cdb79e110c2dbc34bfc

1 files changed, 77 insertions, 0 deletions

diff --git a/include/hw/vfio/vfio-platform.h b/include/hw/vfio/vfio-platform.h
new file mode 100644
index 000000000..c5cf1d79f
--- /dev/null
+++ b/include/hw/vfio/vfio-platform.h
@@ -0,0 +1,77 @@
+/*
+ * vfio based device assignment support - platform devices
+ *
+ * Copyright Linaro Limited, 2014
+ *
+ * Authors:
+ *  Kim Phillips <kim.phillips@linaro.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Based on vfio based PCI device assignment support:
+ *  Copyright Red Hat, Inc. 2012
+ */
+
+#ifndef HW_VFIO_VFIO_PLATFORM_H
+#define HW_VFIO_VFIO_PLATFORM_H
+
+#include "hw/sysbus.h"
+#include "hw/vfio/vfio-common.h"
+#include "qemu/event_notifier.h"
+#include "qemu/queue.h"
+#include "hw/irq.h"
+
+#define TYPE_VFIO_PLATFORM "vfio-platform"
+
+enum {
+    VFIO_IRQ_INACTIVE = 0,
+    VFIO_IRQ_PENDING = 1,
+    VFIO_IRQ_ACTIVE = 2,
+    /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
+};
+
+typedef struct VFIOINTp {
+    QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
+    QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
+    EventNotifier interrupt; /* eventfd triggered on interrupt */
+    EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
+    qemu_irq qemuirq;
+    struct VFIOPlatformDevice *vdev; /* back pointer to device */
+    int state; /* inactive, pending, active */
+    uint8_t pin; /* index */
+    uint32_t flags; /* IRQ info flags */
+    bool kvm_accel; /* set when QEMU bypass through KVM enabled */
+} VFIOINTp;
+
+/* function type for user side eventfd handler */
+typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp);
+
+typedef struct VFIOPlatformDevice {
+    SysBusDevice sbdev;
+    VFIODevice vbasedev; /* not a QOM object */
+    VFIORegion **regions;
+    QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */
+    /* queue of pending IRQs */
+    QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue;
+    char *compat; /* compatibility string */
+    uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
+    QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */
+    QemuMutex intp_mutex; /* protect the intp_list IRQ state */
+    bool irqfd_allowed; /* debug option to force irqfd on/off */
+} VFIOPlatformDevice;
+
+typedef struct VFIOPlatformDeviceClass {
+    /*< private >*/
+    SysBusDeviceClass parent_class;
+    /*< public >*/
+} VFIOPlatformDeviceClass;
+
+#define VFIO_PLATFORM_DEVICE(obj) \
+     OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
+#define VFIO_PLATFORM_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
+#define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
+
+#endif /*HW_VFIO_VFIO_PLATFORM_H*/