42  * host1x_subdev_add() - add a new subdevice with an associated device node
43  * @device: host1x device to add the subdevice to
44  * @np: device node
46 static int host1x_subdev_add(struct host1x_device *device,  in host1x_subdev_add()  argument
61 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_add()
62 	list_add_tail(&subdev->list, &device->subdevs);  in host1x_subdev_add()
63 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_add()
69 			err = host1x_subdev_add(device, driver, child);  in host1x_subdev_add()
93  * host1x_device_parse_dt() - scan device tree and add matching subdevices
94  * @device: host1x logical device
97 static int host1x_device_parse_dt(struct host1x_device *device,  in host1x_device_parse_dt()  argument
103 	for_each_child_of_node(device->dev.parent->of_node, np) {  in host1x_device_parse_dt()
106 			err = host1x_subdev_add(device, driver, np);  in host1x_device_parse_dt()
117 static void host1x_subdev_register(struct host1x_device *device,  in host1x_subdev_register()  argument
126 	 * client with its parent device.  in host1x_subdev_register()
128 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_register()
129 	mutex_lock(&device->clients_lock);  in host1x_subdev_register()
130 	list_move_tail(&client->list, &device->clients);  in host1x_subdev_register()
131 	list_move_tail(&subdev->list, &device->active);  in host1x_subdev_register()
132 	client->parent = &device->dev;  in host1x_subdev_register()
134 	mutex_unlock(&device->clients_lock);  in host1x_subdev_register()
135 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_register()
137 	if (list_empty(&device->subdevs)) {  in host1x_subdev_register()
138 		err = device_add(&device->dev);  in host1x_subdev_register()
140 			dev_err(&device->dev, "failed to add: %d\n", err);  in host1x_subdev_register()
142 			device->registered = true;  in host1x_subdev_register()
146 static void __host1x_subdev_unregister(struct host1x_device *device,  in __host1x_subdev_unregister()  argument
155 	if (list_empty(&device->subdevs)) {  in __host1x_subdev_unregister()
156 		if (device->registered) {  in __host1x_subdev_unregister()
157 			device->registered = false;  in __host1x_subdev_unregister()
158 			device_del(&device->dev);  in __host1x_subdev_unregister()
166 	mutex_lock(&device->clients_lock);  in __host1x_subdev_unregister()
169 	list_move_tail(&subdev->list, &device->subdevs);  in __host1x_subdev_unregister()
172 	 * when the device is about to be deleted.  in __host1x_subdev_unregister()
176 	 * also when the composite device is about to be removed.  in __host1x_subdev_unregister()
179 	mutex_unlock(&device->clients_lock);  in __host1x_subdev_unregister()
182 static void host1x_subdev_unregister(struct host1x_device *device,  in host1x_subdev_unregister()  argument
185 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_unregister()
186 	__host1x_subdev_unregister(device, subdev);  in host1x_subdev_unregister()
187 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_unregister()
191  * host1x_device_init() - initialize a host1x logical device
192  * @device: host1x logical device
194  * The driver for the host1x logical device can call this during execution of
200 int host1x_device_init(struct host1x_device *device)  in host1x_device_init()  argument
205 	mutex_lock(&device->clients_lock);  in host1x_device_init()
207 	list_for_each_entry(client, &device->clients, list) {  in host1x_device_init()
211 				dev_err(&device->dev,  in host1x_device_init()
219 	mutex_unlock(&device->clients_lock);  in host1x_device_init()
224 	list_for_each_entry_continue_reverse(client, &device->clients, list)  in host1x_device_init()
228 	mutex_unlock(&device->clients_lock);  in host1x_device_init()
234  * host1x_device_exit() - uninitialize host1x logical device
235  * @device: host1x logical device
237  * When the driver for a host1x logical device is unloaded, it can call this
242 int host1x_device_exit(struct host1x_device *device)  in host1x_device_exit()  argument
247 	mutex_lock(&device->clients_lock);  in host1x_device_exit()
249 	list_for_each_entry_reverse(client, &device->clients, list) {  in host1x_device_exit()
253 				dev_err(&device->dev,  in host1x_device_exit()
256 				mutex_unlock(&device->clients_lock);  in host1x_device_exit()
262 	mutex_unlock(&device->clients_lock);  in host1x_device_exit()
271 	struct host1x_device *device;  in host1x_add_client()  local
276 	list_for_each_entry(device, &host1x->devices, list) {  in host1x_add_client()
277 		list_for_each_entry(subdev, &device->subdevs, list) {  in host1x_add_client()
279 				host1x_subdev_register(device, subdev, client);  in host1x_add_client()
293 	struct host1x_device *device, *dt;  in host1x_del_client()  local
298 	list_for_each_entry_safe(device, dt, &host1x->devices, list) {  in host1x_del_client()
299 		list_for_each_entry(subdev, &device->active, list) {  in host1x_del_client()
301 				host1x_subdev_unregister(device, subdev);  in host1x_del_client()
312 static int host1x_device_match(struct device *dev, struct device_driver *drv)  in host1x_device_match()
317 static int host1x_dma_configure(struct device *dev)  in host1x_dma_configure()
338 static void __host1x_device_del(struct host1x_device *device)  in __host1x_device_del()  argument
343 	mutex_lock(&device->subdevs_lock);  in __host1x_device_del()
346 	list_for_each_entry_safe(subdev, sd, &device->active, list) {  in __host1x_device_del()
358 		__host1x_subdev_unregister(device, subdev);  in __host1x_device_del()
367 	list_for_each_entry_safe(subdev, sd, &device->subdevs, list)  in __host1x_device_del()
370 	mutex_unlock(&device->subdevs_lock);  in __host1x_device_del()
374 	mutex_lock(&device->clients_lock);  in __host1x_device_del()
376 	list_for_each_entry_safe(client, cl, &device->clients, list)  in __host1x_device_del()
379 	mutex_unlock(&device->clients_lock);  in __host1x_device_del()
382 	/* finally remove the device */  in __host1x_device_del()
383 	list_del_init(&device->list);  in __host1x_device_del()
386 static void host1x_device_release(struct device *dev)  in host1x_device_release()
388 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_release()  local
390 	__host1x_device_del(device);  in host1x_device_release()
391 	kfree(device);  in host1x_device_release()
399 	struct host1x_device *device;  in host1x_device_add()  local
402 	device = kzalloc(sizeof(*device), GFP_KERNEL);  in host1x_device_add()
403 	if (!device)  in host1x_device_add()
406 	device_initialize(&device->dev);  in host1x_device_add()
408 	mutex_init(&device->subdevs_lock);  in host1x_device_add()
409 	INIT_LIST_HEAD(&device->subdevs);  in host1x_device_add()
410 	INIT_LIST_HEAD(&device->active);  in host1x_device_add()
411 	mutex_init(&device->clients_lock);  in host1x_device_add()
412 	INIT_LIST_HEAD(&device->clients);  in host1x_device_add()
413 	INIT_LIST_HEAD(&device->list);  in host1x_device_add()
414 	device->driver = driver;  in host1x_device_add()
416 	device->dev.coherent_dma_mask = host1x->dev->coherent_dma_mask;  in host1x_device_add()
417 	device->dev.dma_mask = &device->dev.coherent_dma_mask;  in host1x_device_add()
418 	dev_set_name(&device->dev, "%s", driver->driver.name);  in host1x_device_add()
419 	device->dev.release = host1x_device_release;  in host1x_device_add()
420 	device->dev.of_node = host1x->dev->of_node;  in host1x_device_add()
421 	device->dev.bus = &host1x_bus_type;  in host1x_device_add()
422 	device->dev.parent = host1x->dev;  in host1x_device_add()
424 	of_dma_configure(&device->dev, host1x->dev->of_node, true);  in host1x_device_add()
426 	device->dev.dma_parms = &device->dma_parms;  in host1x_device_add()
427 	dma_set_max_seg_size(&device->dev, SZ_4M);  in host1x_device_add()
429 	err = host1x_device_parse_dt(device, driver);  in host1x_device_add()
431 		kfree(device);  in host1x_device_add()
435 	list_add_tail(&device->list, &host1x->devices);  in host1x_device_add()
440 		list_for_each_entry(subdev, &device->subdevs, list) {  in host1x_device_add()
442 				host1x_subdev_register(device, subdev, client);  in host1x_device_add()
454  * Removes a device by first unregistering any subdevices and then removing
460 			      struct host1x_device *device)  in host1x_device_del()  argument
462 	if (device->registered) {  in host1x_device_del()
463 		device->registered = false;  in host1x_device_del()
464 		device_del(&device->dev);  in host1x_device_del()
467 	put_device(&device->dev);  in host1x_device_del()
473 	struct host1x_device *device;  in host1x_attach_driver()  local
478 	list_for_each_entry(device, &host1x->devices, list) {  in host1x_attach_driver()
479 		if (device->driver == driver) {  in host1x_attach_driver()
487 		dev_err(host1x->dev, "failed to allocate device: %d\n", err);  in host1x_attach_driver()
495 	struct host1x_device *device, *tmp;  in host1x_detach_driver()  local
499 	list_for_each_entry_safe(device, tmp, &host1x->devices, list)  in host1x_detach_driver()
500 		if (device->driver == driver)  in host1x_detach_driver()
501 			host1x_device_del(host1x, device);  in host1x_detach_driver()
557 static int host1x_device_probe(struct device *dev)  in host1x_device_probe()
560 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_probe()  local
563 		return driver->probe(device);  in host1x_device_probe()
568 static int host1x_device_remove(struct device *dev)  in host1x_device_remove()
571 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_remove()  local
574 		return driver->remove(device);  in host1x_device_remove()
579 static void host1x_device_shutdown(struct device *dev)  in host1x_device_shutdown()
582 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_shutdown()  local
585 		driver->shutdown(device);  in host1x_device_shutdown()
595  * registration of the driver actually triggers tho logical device creation.
596  * A logical device will be created for each host1x instance.
660  * device and call host1x_device_init(), which will in turn call each client's
693  * device has already been initialized, it will be torn down.