[PATCH V2 05/12] virtio_config: introduce a new ready method

Jason Wang
2021-10-12T06:53:21Z

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
include/linux/virtio_config.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 8519b3ae5d52..f2891c6221a1 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -23,6 +23,8 @@ struct virtio_shm_region {
* any of @get/@set, @get_status/@set_status, or @get_features/
* @finalize_features are NOT safe to be called from an atomic
* context.
+ * @ready: make the device ready
+ * vdev: the virtio_device
* @get: read the value of a configuration field
* vdev: the virtio_device
* offset: the offset of the configuration field
@@ -75,6 +77,7 @@ struct virtio_shm_region {
*/
typedef void vq_callback_t(struct virtqueue *);
struct virtio_config_ops {
+ void (*ready)(struct virtio_device *vdev);
void (*get)(struct virtio_device *vdev, unsigned offset,
void *buf, unsigned len);
void (*set)(struct virtio_device *vdev, unsigned offset,
@@ -229,6 +232,9 @@ void virtio_device_ready(struct virtio_device *dev)
{
unsigned status = dev->config->get_status(dev);

+ if (dev->config->ready)
+ dev->config->ready(dev);
+
BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
dev->config->set_status(dev, status | VIRTIO_CONFIG_S_DRIVER_OK);
}
--
2.25.1