diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/virtio.h | 14 | ||||
| -rw-r--r-- | include/linux/virtio_config.h | 17 |
2 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index b46671e28de2..65261a7244fc 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,6 +78,10 @@ bool virtqueue_is_broken(struct virtqueue *vq); /** * virtio_device - representation of a device using virtio * @index: unique position on the virtio bus + * @failed: saved value for CONFIG_S_FAILED bit (for restore) + * @config_enabled: configuration change reporting enabled + * @config_change_pending: configuration change reported while disabled + * @config_lock: protects configuration change reporting * @dev: underlying device. * @id: the device type identification (used to match it with a driver). * @config: the configuration ops for this device. @@ -88,6 +92,10 @@ bool virtqueue_is_broken(struct virtqueue *vq); */ struct virtio_device { int index; + bool failed; + bool config_enabled; + bool config_change_pending; + spinlock_t config_lock; struct device dev; struct virtio_device_id id; const struct virtio_config_ops *config; @@ -108,6 +116,12 @@ void unregister_virtio_device(struct virtio_device *dev); void virtio_break_device(struct virtio_device *dev); +void virtio_config_changed(struct virtio_device *dev); +#ifdef CONFIG_PM_SLEEP +int virtio_device_freeze(struct virtio_device *dev); +int virtio_device_restore(struct virtio_device *dev); +#endif + /** * virtio_driver - operations for a virtio I/O driver * @driver: underlying device driver (populate name and owner). diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index e8f8f71e843c..7f4ef66873ef 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -109,6 +109,23 @@ struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev, return vq; } +/** + * virtio_device_ready - enable vq use in probe function + * @vdev: the device + * + * Driver must call this to use vqs in the probe function. + * + * Note: vqs are enabled automatically after probe returns. + */ +static inline +void virtio_device_ready(struct virtio_device *dev) +{ + unsigned status = dev->config->get_status(dev); + + BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK); + dev->config->set_status(dev, status | VIRTIO_CONFIG_S_DRIVER_OK); +} + static inline const char *virtio_bus_name(struct virtio_device *vdev) { |