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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2022 HabanaLabs, Ltd.
* All Rights Reserved.
*
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <drm/drm_accel.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_print.h>
static struct dentry *accel_debugfs_root;
static struct class *accel_class;
static char *accel_devnode(struct device *dev, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "accel/%s", dev_name(dev));
}
static int accel_sysfs_init(void)
{
accel_class = class_create(THIS_MODULE, "accel");
if (IS_ERR(accel_class))
return PTR_ERR(accel_class);
accel_class->devnode = accel_devnode;
return 0;
}
static void accel_sysfs_destroy(void)
{
if (IS_ERR_OR_NULL(accel_class))
return;
class_destroy(accel_class);
accel_class = NULL;
}
static int accel_stub_open(struct inode *inode, struct file *filp)
{
return -EOPNOTSUPP;
}
static const struct file_operations accel_stub_fops = {
.owner = THIS_MODULE,
.open = accel_stub_open,
.llseek = noop_llseek,
};
void accel_core_exit(void)
{
unregister_chrdev(ACCEL_MAJOR, "accel");
debugfs_remove(accel_debugfs_root);
accel_sysfs_destroy();
}
int __init accel_core_init(void)
{
int ret;
ret = accel_sysfs_init();
if (ret < 0) {
DRM_ERROR("Cannot create ACCEL class: %d\n", ret);
goto error;
}
accel_debugfs_root = debugfs_create_dir("accel", NULL);
ret = register_chrdev(ACCEL_MAJOR, "accel", &accel_stub_fops);
if (ret < 0)
DRM_ERROR("Cannot register ACCEL major: %d\n", ret);
error:
/*
* Any cleanup due to errors will be done in drm_core_exit() that
* will call accel_core_exit()
*/
return ret;
}
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