1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/device.h>
29 static char *accel_devnode(const struct device *dev, umode_t *mode)  in accel_devnode()
51 	struct drm_info_node *node = (struct drm_info_node *) m->private;  in accel_name_info()
52 	struct drm_minor *minor = node->minor;  in accel_name_info()
53 	struct drm_device *dev = minor->dev;  in accel_name_info()
56 	mutex_lock(&dev->master_mutex);  in accel_name_info()
57 	master = dev->master;  in accel_name_info()
58 	seq_printf(m, "%s", dev->driver->name);  in accel_name_info()
59 	if (dev->dev)  in accel_name_info()
60 		seq_printf(m, " dev=%s", dev_name(dev->dev));  in accel_name_info()
61 	if (master && master->unique)  in accel_name_info()
62 		seq_printf(m, " master=%s", master->unique);  in accel_name_info()
63 	if (dev->unique)  in accel_name_info()
64 		seq_printf(m, " unique=%s", dev->unique);  in accel_name_info()
66 	mutex_unlock(&dev->master_mutex);  in accel_name_info()
77  * accel_debugfs_init() - Initialize debugfs for device
78  * @dev: Pointer to the device instance.
80  * This function creates a root directory for the device in debugfs.
88  * accel_debugfs_register() - Register debugfs for device
89  * @dev: Pointer to the device instance.
95 	struct drm_minor *minor = dev->accel;  in accel_debugfs_register()
97 	minor->debugfs_root = dev->debugfs_root;  in accel_debugfs_register()
100 				 dev->debugfs_root, minor);  in accel_debugfs_register()
104  * accel_set_device_instance_params() - Set some device parameters for accel device
105  * @kdev: Pointer to the device instance.
108  * This function creates the dev_t of the device using the accel major and
109  * the device's minor number. In addition, it sets the class and type of the
110  * device instance to the accel sysfs class and device type, respectively.
112 void accel_set_device_instance_params(struct device *kdev, int index)  in accel_set_device_instance_params()
114 	kdev->devt = MKDEV(ACCEL_MAJOR, index);  in accel_set_device_instance_params()
115 	kdev->class = &accel_class;  in accel_set_device_instance_params()
116 	kdev->type = &accel_sysfs_device_minor;  in accel_set_device_instance_params()
120  * accel_open - open method for ACCEL file
121  * @inode: device inode
125  * It looks up the correct ACCEL device and instantiates all the per-file
140 	dev = minor->dev;  in accel_open()
142 	atomic_fetch_inc(&dev->open_count);  in accel_open()
144 	/* share address_space across all char-devs of a single device */  in accel_open()
145 	filp->f_mapping = dev->anon_inode->i_mapping;  in accel_open()
154 	atomic_dec(&dev->open_count);  in accel_open()
170 	new_fops = fops_get(minor->dev->driver->fops);  in accel_stub_open()
172 		err = -ENODEV;  in accel_stub_open()
177 	if (filp->f_op->open)  in accel_stub_open()
178 		err = filp->f_op->open(inode, filp);  in accel_stub_open()