vfio/platform: initial interrupts support code

This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.

Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index a2e286ed1407..b119a6c5ac23 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -30,6 +30,7 @@
 struct vfio_platform_irq {
         u32                     flags;
         u32                     count;
+        int                     hwirq;
 };
 
 struct vfio_platform_region {
@@ -48,6 +49,7 @@ struct vfio_platform_device {
         struct vfio_platform_irq        *irqs;
         u32                             num_irqs;
         int                             refcnt;
+        struct mutex                    igate;
 
         /*
          * These fields should be filled by the bus specific binder
@@ -69,4 +71,9 @@ extern struct vfio_platform_device *vfio_platform_remove_common
 extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
 extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
 
+extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
+                                        uint32_t flags, unsigned index,
+                                        unsigned start, unsigned count,
+                                        void *data);
+
 #endif /* VFIO_PLATFORM_PRIVATE_H */