14 	struct virtio_device *dev = dev_to_virtio(_d);  in device_show()  local
15 	return sprintf(buf, "0x%04x\n", dev->id.device);  in device_show()
22 	struct virtio_device *dev = dev_to_virtio(_d);  in vendor_show()  local
23 	return sprintf(buf, "0x%04x\n", dev->id.vendor);  in vendor_show()
30 	struct virtio_device *dev = dev_to_virtio(_d);  in status_show()  local
31 	return sprintf(buf, "0x%08x\n", dev->config->get_status(dev));  in status_show()
38 	struct virtio_device *dev = dev_to_virtio(_d);  in modalias_show()  local
40 		       dev->id.device, dev->id.vendor);  in modalias_show()
47 	struct virtio_device *dev = dev_to_virtio(_d);  in features_show()  local
53 	for (i = 0; i < sizeof(dev->features)*8; i++)  in features_show()
55 			       __virtio_test_bit(dev, i) ? '1' : '0');  in features_show()
71 static inline int virtio_id_match(const struct virtio_device *dev,  in virtio_id_match()  argument
74 	if (id->device != dev->id.device && id->device != VIRTIO_DEV_ANY_ID)  in virtio_id_match()
77 	return id->vendor == VIRTIO_DEV_ANY_ID || id->vendor == dev->id.vendor;  in virtio_id_match()
85 	struct virtio_device *dev = dev_to_virtio(_dv);  in virtio_dev_match()  local
90 		if (virtio_id_match(dev, &ids[i]))  in virtio_dev_match()
97 	struct virtio_device *dev = dev_to_virtio(_dv);  in virtio_uevent()  local
100 			      dev->id.device, dev->id.vendor);  in virtio_uevent()
103 static void add_status(struct virtio_device *dev, unsigned status)  in add_status()  argument
105 	dev->config->set_status(dev, dev->config->get_status(dev) | status);  in add_status()
112 	struct virtio_driver *drv = drv_to_virtio(vdev->dev.driver);  in virtio_check_driver_offered_feature()
128 static void __virtio_config_changed(struct virtio_device *dev)  in __virtio_config_changed()  argument
130 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);  in __virtio_config_changed()
132 	if (!dev->config_enabled)  in __virtio_config_changed()
133 		dev->config_change_pending = true;  in __virtio_config_changed()
135 		drv->config_changed(dev);  in __virtio_config_changed()
138 void virtio_config_changed(struct virtio_device *dev)  in virtio_config_changed()  argument
142 	spin_lock_irqsave(&dev->config_lock, flags);  in virtio_config_changed()
143 	__virtio_config_changed(dev);  in virtio_config_changed()
144 	spin_unlock_irqrestore(&dev->config_lock, flags);  in virtio_config_changed()
148 static void virtio_config_disable(struct virtio_device *dev)  in virtio_config_disable()  argument
150 	spin_lock_irq(&dev->config_lock);  in virtio_config_disable()
151 	dev->config_enabled = false;  in virtio_config_disable()
152 	spin_unlock_irq(&dev->config_lock);  in virtio_config_disable()
155 static void virtio_config_enable(struct virtio_device *dev)  in virtio_config_enable()  argument
157 	spin_lock_irq(&dev->config_lock);  in virtio_config_enable()
158 	dev->config_enabled = true;  in virtio_config_enable()
159 	if (dev->config_change_pending)  in virtio_config_enable()
160 		__virtio_config_changed(dev);  in virtio_config_enable()
161 	dev->config_change_pending = false;  in virtio_config_enable()
162 	spin_unlock_irq(&dev->config_lock);  in virtio_config_enable()
165 static int virtio_finalize_features(struct virtio_device *dev)  in virtio_finalize_features()  argument
167 	int ret = dev->config->finalize_features(dev);  in virtio_finalize_features()
173 	if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1))  in virtio_finalize_features()
176 	add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);  in virtio_finalize_features()
177 	status = dev->config->get_status(dev);  in virtio_finalize_features()
179 		dev_err(&dev->dev, "virtio: device refuses features: %x\n",  in virtio_finalize_features()
189 	struct virtio_device *dev = dev_to_virtio(_d);  in virtio_dev_probe()  local
190 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);  in virtio_dev_probe()
196 	add_status(dev, VIRTIO_CONFIG_S_DRIVER);  in virtio_dev_probe()
199 	device_features = dev->config->get_features(dev);  in virtio_dev_probe()
222 		dev->features = driver_features & device_features;  in virtio_dev_probe()
224 		dev->features = driver_features_legacy & device_features;  in virtio_dev_probe()
229 			__virtio_set_bit(dev, i);  in virtio_dev_probe()
231 	err = virtio_finalize_features(dev);  in virtio_dev_probe()
235 	err = drv->probe(dev);  in virtio_dev_probe()
240 	if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK))  in virtio_dev_probe()
241 		virtio_device_ready(dev);  in virtio_dev_probe()
244 		drv->scan(dev);  in virtio_dev_probe()
246 	virtio_config_enable(dev);  in virtio_dev_probe()
250 	add_status(dev, VIRTIO_CONFIG_S_FAILED);  in virtio_dev_probe()
257 	struct virtio_device *dev = dev_to_virtio(_d);  in virtio_dev_remove()  local
258 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);  in virtio_dev_remove()
260 	virtio_config_disable(dev);  in virtio_dev_remove()
262 	drv->remove(dev);  in virtio_dev_remove()
265 	WARN_ON_ONCE(dev->config->get_status(dev));  in virtio_dev_remove()
268 	add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);  in virtio_dev_remove()
296 int register_virtio_device(struct virtio_device *dev)  in register_virtio_device()  argument
300 	dev->dev.bus = &virtio_bus;  in register_virtio_device()
307 	dev->index = err;  in register_virtio_device()
308 	dev_set_name(&dev->dev, "virtio%u", dev->index);  in register_virtio_device()
310 	spin_lock_init(&dev->config_lock);  in register_virtio_device()
311 	dev->config_enabled = false;  in register_virtio_device()
312 	dev->config_change_pending = false;  in register_virtio_device()
316 	dev->config->reset(dev);  in register_virtio_device()
319 	add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);  in register_virtio_device()
321 	INIT_LIST_HEAD(&dev->vqs);  in register_virtio_device()
325 	err = device_register(&dev->dev);  in register_virtio_device()
328 		add_status(dev, VIRTIO_CONFIG_S_FAILED);  in register_virtio_device()
333 void unregister_virtio_device(struct virtio_device *dev)  in unregister_virtio_device()  argument
335 	int index = dev->index; /* save for after device release */  in unregister_virtio_device()
337 	device_unregister(&dev->dev);  in unregister_virtio_device()
343 int virtio_device_freeze(struct virtio_device *dev)  in virtio_device_freeze()  argument
345 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);  in virtio_device_freeze()
347 	virtio_config_disable(dev);  in virtio_device_freeze()
349 	dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED;  in virtio_device_freeze()
352 		return drv->freeze(dev);  in virtio_device_freeze()
358 int virtio_device_restore(struct virtio_device *dev)  in virtio_device_restore()  argument
360 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);  in virtio_device_restore()
365 	dev->config->reset(dev);  in virtio_device_restore()
368 	add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);  in virtio_device_restore()
372 	if (dev->failed)  in virtio_device_restore()
373 		add_status(dev, VIRTIO_CONFIG_S_FAILED);  in virtio_device_restore()
379 	add_status(dev, VIRTIO_CONFIG_S_DRIVER);  in virtio_device_restore()
381 	ret = virtio_finalize_features(dev);  in virtio_device_restore()
386 		ret = drv->restore(dev);  in virtio_device_restore()
392 	add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);  in virtio_device_restore()
394 	virtio_config_enable(dev);  in virtio_device_restore()
399 	add_status(dev, VIRTIO_CONFIG_S_FAILED);  in virtio_device_restore()