gpu/host1x/bus.c

9 #include <linux/host1x.h>
35  * @device: host1x device to add the subdevice to
36  * @driver: host1x driver containing the subdevices
87  * @device: host1x logical device
88  * @driver: host1x driver
184  * host1x_device_init() - initialize a host1x logical device
185  * @device: host1x logical device
187  * The driver for the host1x logical device can call this during execution of
246  * host1x_device_exit() - uninitialize host1x logical device
247  * @device: host1x logical device
249  * When the driver for a host1x logical device is unloaded, it can call this
292 static int host1x_add_client(struct host1x *host1x,
298 	mutex_lock(&host1x->devices_lock);
300 	list_for_each_entry(device, &host1x->devices, list) {
304 				mutex_unlock(&host1x->devices_lock);
310 	mutex_unlock(&host1x->devices_lock);
314 static int host1x_del_client(struct host1x *host1x,
320 	mutex_lock(&host1x->devices_lock);
322 	list_for_each_entry_safe(device, dt, &host1x->devices, list) {
326 				mutex_unlock(&host1x->devices_lock);
332 	mutex_unlock(&host1x->devices_lock);
364 	.name = "host1x",
426 static int host1x_device_add(struct host1x *host1x,
448 	device->dev.coherent_dma_mask = host1x->dev->coherent_dma_mask;
453 	device->dev.parent = host1x->dev;
464 	list_add_tail(&device->list, &host1x->devices);
486  * This function must be called with the host1x->devices_lock held.
488 static void host1x_device_del(struct host1x *host1x,
499 static void host1x_attach_driver(struct host1x *host1x,
505 	mutex_lock(&host1x->devices_lock);
507 	list_for_each_entry(device, &host1x->devices, list) {
509 			mutex_unlock(&host1x->devices_lock);
514 	err = host1x_device_add(host1x, driver);
516 		dev_err(host1x->dev, "failed to allocate device: %d\n", err);
518 	mutex_unlock(&host1x->devices_lock);
521 static void host1x_detach_driver(struct host1x *host1x,
526 	mutex_lock(&host1x->devices_lock);
528 	list_for_each_entry_safe(device, tmp, &host1x->devices, list)
530 			host1x_device_del(host1x, device);
532 	mutex_unlock(&host1x->devices_lock);
537 	struct host1x *host1x = s->private;
540 	mutex_lock(&host1x->devices_lock);
542 	list_for_each_entry(device, &host1x->devices, list) {
559 	mutex_unlock(&host1x->devices_lock);
566  * host1x_register() - register a host1x controller
567  * @host1x: host1x controller
569  * The host1x controller driver uses this to register a host1x controller with
571  * with a single host1x instance, so this function is somewhat academic.
573 int host1x_register(struct host1x *host1x)
578 	list_add_tail(&host1x->list, &devices);
584 		host1x_attach_driver(host1x, driver);
588 	debugfs_create_file("devices", S_IRUGO, host1x->debugfs, host1x,
595  * host1x_unregister() - unregister a host1x controller
596  * @host1x: host1x controller
598  * The host1x controller driver uses this to remove a host1x controller from
601 int host1x_unregister(struct host1x *host1x)
608 		host1x_detach_driver(host1x, driver);
613 	list_del_init(&host1x->list);
651  * host1x_driver_register_full() - register a host1x driver
652  * @driver: host1x driver
655  * Drivers for host1x logical devices call this function to register a driver
658  * A logical device will be created for each host1x instance.
663 	struct host1x *host1x;
673 	list_for_each_entry(host1x, &devices, list)
674 		host1x_attach_driver(host1x, driver);
689  * host1x_driver_unregister() - unregister a host1x driver
690  * @driver: host1x driver
692  * Unbinds the driver from each of the host1x logical devices that it is
697 	struct host1x *host1x;
703 	list_for_each_entry(host1x, &devices, list)
704 		host1x_detach_driver(host1x, driver);
715  * __host1x_client_init() - initialize a host1x client
716  * @client: host1x client
723 	__mutex_init(&client->lock, "host1x client lock", key);
729  * host1x_client_exit() - uninitialize a host1x client
730  * @client: host1x client
739  * __host1x_client_register() - register a host1x client
740  * @client: host1x client
742  * Registers a host1x client with each host1x controller instance. Note that
743  * each client will only match their parent host1x controller and will only be
745  * their parent host1x controller, the infrastructure will set up the logical
751 	struct host1x *host1x;
756 	list_for_each_entry(host1x, &devices, list) {
757 		err = host1x_add_client(host1x, client);
775  * host1x_client_unregister() - unregister a host1x client
776  * @client: host1x client
778  * Removes a host1x client from its host1x controller instance. If a logical
784 	struct host1x *host1x;
789 	list_for_each_entry(host1x, &devices, list) {
790 		err = host1x_del_client(host1x, client);