@@ -103,6 +103,8 @@ static void vfio_platform_release(void *device_data)
mutex_lock(&driver_lock);
if (!(--vdev->refcnt)) {
+ if (vdev->reset)
+ vdev->reset(vdev);
vfio_platform_regions_cleanup(vdev);
vfio_platform_irq_cleanup(vdev);
}
@@ -130,6 +132,9 @@ static int vfio_platform_open(void *device_data)
ret = vfio_platform_irq_init(vdev);
if (ret)
goto err_irq;
+
+ if (vdev->reset)
+ vdev->reset(vdev);
}
vdev->refcnt++;
@@ -162,6 +167,8 @@ static long vfio_platform_ioctl(void *device_data,
if (info.argsz < minsz)
return -EINVAL;
+ if (vdev->reset)
+ vdev->flags |= VFIO_DEVICE_FLAGS_RESET;
info.flags = vdev->flags;
info.num_regions = vdev->num_regions;
info.num_irqs = vdev->num_irqs;
@@ -255,8 +262,12 @@ static long vfio_platform_ioctl(void *device_data,
return ret;
- } else if (cmd == VFIO_DEVICE_RESET)
- return -EINVAL;
+ } else if (cmd == VFIO_DEVICE_RESET) {
+ if (vdev->reset)
+ return vdev->reset(vdev);
+ else
+ return -EINVAL;
+ }
return -ENOTTY;
}
@@ -67,6 +67,7 @@ struct vfio_platform_device {
struct resource*
(*get_resource)(struct vfio_platform_device *vdev, int i);
int (*get_irq)(struct vfio_platform_device *vdev, int i);
+ int (*reset)(struct vfio_platform_device *vdev);
};
struct vfio_platform_reset_combo {
A new reset callback is introduced. If this callback is populated, the reset is invoked on device first open/last close or upon userspace ioctl. The modality is exposed on VFIO_DEVICE_GET_INFO. Signed-off-by: Eric Auger <eric.auger@linaro.org> --- v1 -> v2: - reset now is also called on first open on top of last close - remove IS_ERR_OR_NULL --- drivers/vfio/platform/vfio_platform_common.c | 15 +++++++++++++-- drivers/vfio/platform/vfio_platform_private.h | 1 + 2 files changed, 14 insertions(+), 2 deletions(-)