33  * host1x_subdev_add() - add a new subdevice with an associated device node
34  * @device: host1x device to add the subdevice to
36  * @np: device node
38 static int host1x_subdev_add(struct host1x_device *device,  in host1x_subdev_add()  argument
53 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_add()
54 	list_add_tail(&subdev->list, &device->subdevs);  in host1x_subdev_add()
55 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_add()
61 			err = host1x_subdev_add(device, driver, child);  in host1x_subdev_add()
85  * host1x_device_parse_dt() - scan device tree and add matching subdevices
86  * @device: host1x logical device
89 static int host1x_device_parse_dt(struct host1x_device *device,  in host1x_device_parse_dt()  argument
95 	for_each_child_of_node(device->dev.parent->of_node, np) {  in host1x_device_parse_dt()
98 			err = host1x_subdev_add(device, driver, np);  in host1x_device_parse_dt()
109 static void host1x_subdev_register(struct host1x_device *device,  in host1x_subdev_register()  argument
118 	 * client with its parent device.  in host1x_subdev_register()
120 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_register()
121 	mutex_lock(&device->clients_lock);  in host1x_subdev_register()
122 	list_move_tail(&client->list, &device->clients);  in host1x_subdev_register()
123 	list_move_tail(&subdev->list, &device->active);  in host1x_subdev_register()
124 	client->host = &device->dev;  in host1x_subdev_register()
126 	mutex_unlock(&device->clients_lock);  in host1x_subdev_register()
127 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_register()
129 	if (list_empty(&device->subdevs)) {  in host1x_subdev_register()
130 		err = device_add(&device->dev);  in host1x_subdev_register()
132 			dev_err(&device->dev, "failed to add: %d\n", err);  in host1x_subdev_register()
134 			device->registered = true;  in host1x_subdev_register()
138 static void __host1x_subdev_unregister(struct host1x_device *device,  in __host1x_subdev_unregister()  argument
147 	if (list_empty(&device->subdevs)) {  in __host1x_subdev_unregister()
148 		if (device->registered) {  in __host1x_subdev_unregister()
149 			device->registered = false;  in __host1x_subdev_unregister()
150 			device_del(&device->dev);  in __host1x_subdev_unregister()
158 	mutex_lock(&device->clients_lock);  in __host1x_subdev_unregister()
161 	list_move_tail(&subdev->list, &device->subdevs);  in __host1x_subdev_unregister()
164 	 * when the device is about to be deleted.  in __host1x_subdev_unregister()
168 	 * also when the composite device is about to be removed.  in __host1x_subdev_unregister()
171 	mutex_unlock(&device->clients_lock);  in __host1x_subdev_unregister()
174 static void host1x_subdev_unregister(struct host1x_device *device,  in host1x_subdev_unregister()  argument
177 	mutex_lock(&device->subdevs_lock);  in host1x_subdev_unregister()
178 	__host1x_subdev_unregister(device, subdev);  in host1x_subdev_unregister()
179 	mutex_unlock(&device->subdevs_lock);  in host1x_subdev_unregister()
183  * host1x_device_init() - initialize a host1x logical device
184  * @device: host1x logical device
186  * The driver for the host1x logical device can call this during execution of
192 int host1x_device_init(struct host1x_device *device)  in host1x_device_init()  argument
197 	mutex_lock(&device->clients_lock);  in host1x_device_init()
199 	list_for_each_entry(client, &device->clients, list) {  in host1x_device_init()
203 				dev_err(&device->dev, "failed to early initialize %s: %d\n",  in host1x_device_init()
210 	list_for_each_entry(client, &device->clients, list) {  in host1x_device_init()
214 				dev_err(&device->dev,  in host1x_device_init()
222 	mutex_unlock(&device->clients_lock);  in host1x_device_init()
227 	list_for_each_entry_continue_reverse(client, &device->clients, list)  in host1x_device_init()
232 	client = list_entry(&device->clients, struct host1x_client, list);  in host1x_device_init()
235 	list_for_each_entry_continue_reverse(client, &device->clients, list)  in host1x_device_init()
239 	mutex_unlock(&device->clients_lock);  in host1x_device_init()
245  * host1x_device_exit() - uninitialize host1x logical device
246  * @device: host1x logical device
248  * When the driver for a host1x logical device is unloaded, it can call this
253 int host1x_device_exit(struct host1x_device *device)  in host1x_device_exit()  argument
258 	mutex_lock(&device->clients_lock);  in host1x_device_exit()
260 	list_for_each_entry_reverse(client, &device->clients, list) {  in host1x_device_exit()
264 				dev_err(&device->dev,  in host1x_device_exit()
267 				mutex_unlock(&device->clients_lock);  in host1x_device_exit()
273 	list_for_each_entry_reverse(client, &device->clients, list) {  in host1x_device_exit()
277 				dev_err(&device->dev, "failed to late cleanup %s: %d\n",  in host1x_device_exit()
279 				mutex_unlock(&device->clients_lock);  in host1x_device_exit()
285 	mutex_unlock(&device->clients_lock);  in host1x_device_exit()
294 	struct host1x_device *device;  in host1x_add_client()  local
299 	list_for_each_entry(device, &host1x->devices, list) {  in host1x_add_client()
300 		list_for_each_entry(subdev, &device->subdevs, list) {  in host1x_add_client()
302 				host1x_subdev_register(device, subdev, client);  in host1x_add_client()
316 	struct host1x_device *device, *dt;  in host1x_del_client()  local
321 	list_for_each_entry_safe(device, dt, &host1x->devices, list) {  in host1x_del_client()
322 		list_for_each_entry(subdev, &device->active, list) {  in host1x_del_client()
324 				host1x_subdev_unregister(device, subdev);  in host1x_del_client()
335 static int host1x_device_match(struct device *dev, struct device_driver *drv)  in host1x_device_match()
340 static int host1x_device_uevent(struct device *dev,  in host1x_device_uevent()
370 static int host1x_dma_configure(struct device *dev)  in host1x_dma_configure()
392 static void __host1x_device_del(struct host1x_device *device)  in __host1x_device_del()  argument
397 	mutex_lock(&device->subdevs_lock);  in __host1x_device_del()
400 	list_for_each_entry_safe(subdev, sd, &device->active, list) {  in __host1x_device_del()
412 		__host1x_subdev_unregister(device, subdev);  in __host1x_device_del()
421 	list_for_each_entry_safe(subdev, sd, &device->subdevs, list)  in __host1x_device_del()
424 	mutex_unlock(&device->subdevs_lock);  in __host1x_device_del()
428 	mutex_lock(&device->clients_lock);  in __host1x_device_del()
430 	list_for_each_entry_safe(client, cl, &device->clients, list)  in __host1x_device_del()
433 	mutex_unlock(&device->clients_lock);  in __host1x_device_del()
436 	/* finally remove the device */  in __host1x_device_del()
437 	list_del_init(&device->list);  in __host1x_device_del()
440 static void host1x_device_release(struct device *dev)  in host1x_device_release()
442 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_release()  local
444 	__host1x_device_del(device);  in host1x_device_release()
445 	kfree(device);  in host1x_device_release()
453 	struct host1x_device *device;  in host1x_device_add()  local
456 	device = kzalloc(sizeof(*device), GFP_KERNEL);  in host1x_device_add()
457 	if (!device)  in host1x_device_add()
460 	device_initialize(&device->dev);  in host1x_device_add()
462 	mutex_init(&device->subdevs_lock);  in host1x_device_add()
463 	INIT_LIST_HEAD(&device->subdevs);  in host1x_device_add()
464 	INIT_LIST_HEAD(&device->active);  in host1x_device_add()
465 	mutex_init(&device->clients_lock);  in host1x_device_add()
466 	INIT_LIST_HEAD(&device->clients);  in host1x_device_add()
467 	INIT_LIST_HEAD(&device->list);  in host1x_device_add()
468 	device->driver = driver;  in host1x_device_add()
470 	device->dev.coherent_dma_mask = host1x->dev->coherent_dma_mask;  in host1x_device_add()
471 	device->dev.dma_mask = &device->dev.coherent_dma_mask;  in host1x_device_add()
472 	dev_set_name(&device->dev, "%s", driver->driver.name);  in host1x_device_add()
473 	device->dev.release = host1x_device_release;  in host1x_device_add()
474 	device->dev.bus = &host1x_bus_type;  in host1x_device_add()
475 	device->dev.parent = host1x->dev;  in host1x_device_add()
477 	of_dma_configure(&device->dev, host1x->dev->of_node, true);  in host1x_device_add()
479 	device->dev.dma_parms = &device->dma_parms;  in host1x_device_add()
480 	dma_set_max_seg_size(&device->dev, UINT_MAX);  in host1x_device_add()
482 	err = host1x_device_parse_dt(device, driver);  in host1x_device_add()
484 		kfree(device);  in host1x_device_add()
488 	list_add_tail(&device->list, &host1x->devices);  in host1x_device_add()
493 		list_for_each_entry(subdev, &device->subdevs, list) {  in host1x_device_add()
495 				host1x_subdev_register(device, subdev, client);  in host1x_device_add()
507  * Removes a device by first unregistering any subdevices and then removing
513 			      struct host1x_device *device)  in host1x_device_del()  argument
515 	if (device->registered) {  in host1x_device_del()
516 		device->registered = false;  in host1x_device_del()
517 		device_del(&device->dev);  in host1x_device_del()
520 	put_device(&device->dev);  in host1x_device_del()
526 	struct host1x_device *device;  in host1x_attach_driver()  local
531 	list_for_each_entry(device, &host1x->devices, list) {  in host1x_attach_driver()
532 		if (device->driver == driver) {  in host1x_attach_driver()
540 		dev_err(host1x->dev, "failed to allocate device: %d\n", err);  in host1x_attach_driver()
548 	struct host1x_device *device, *tmp;  in host1x_detach_driver()  local
552 	list_for_each_entry_safe(device, tmp, &host1x->devices, list)  in host1x_detach_driver()
553 		if (device->driver == driver)  in host1x_detach_driver()
554 			host1x_device_del(host1x, device);  in host1x_detach_driver()
562 	struct host1x_device *device;  in host1x_devices_show()  local
566 	list_for_each_entry(device, &host1x->devices, list) {  in host1x_devices_show()
569 		seq_printf(s, "%s\n", dev_name(&device->dev));  in host1x_devices_show()
571 		mutex_lock(&device->subdevs_lock);  in host1x_devices_show()
573 		list_for_each_entry(subdev, &device->active, list)  in host1x_devices_show()
577 		list_for_each_entry(subdev, &device->subdevs, list)  in host1x_devices_show()
580 		mutex_unlock(&device->subdevs_lock);  in host1x_devices_show()
643 static int host1x_device_probe(struct device *dev)  in host1x_device_probe()
646 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_probe()  local
649 		return driver->probe(device);  in host1x_device_probe()
654 static int host1x_device_remove(struct device *dev)  in host1x_device_remove()
657 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_remove()  local
660 		return driver->remove(device);  in host1x_device_remove()
665 static void host1x_device_shutdown(struct device *dev)  in host1x_device_shutdown()
668 	struct host1x_device *device = to_host1x_device(dev);  in host1x_device_shutdown()  local
671 		driver->shutdown(device);  in host1x_device_shutdown()
681  * registration of the driver actually triggers tho logical device creation.
682  * A logical device will be created for each host1x instance.
770  * device and call host1x_device_init(), which will in turn call each client's
803  * device has already been initialized, it will be torn down.