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b8ed894279
THIS_MODULE is dropped from Linux6.6. Removing this via conftest. Bug 4346767 Change-Id: I01a03b6ce6daeb1715fd06d3f6c4a2507f1a441c Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3008088 GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* SPDX-FileCopyrightText: Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
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#include <nvidia/conftest.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/cdev.h>
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#include <linux/uaccess.h>
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/* Define IOCTL commands */
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#define IOCTL_SET_VALUE _IOW('k', 1, int)
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#define IOCTL_GET_VALUE _IOR('k', 2, int)
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static int value;
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static dev_t dev_num;
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static struct cdev cdev;
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static struct class *dev_class;
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static int device_open(struct inode *inode, struct file *file)
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{
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pr_info("ioctl_example: Device opened\n");
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return 0;
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}
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static int device_release(struct inode *inode, struct file *file)
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{
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pr_info("ioctl_example: Device closed\n");
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return 0;
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}
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static long device_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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int ret = 0;
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switch (cmd) {
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case IOCTL_SET_VALUE:
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if (copy_from_user(&value, (int *)arg, sizeof(int)))
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ret = -EFAULT;
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break;
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case IOCTL_GET_VALUE:
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if (copy_to_user((int *)arg, &value, sizeof(int)))
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ret = -EFAULT;
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break;
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default:
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ret = -ENOTTY;
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break;
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}
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return ret;
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}
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static struct file_operations fops = {
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#if !defined(NV_CLASS_CREATE_HAS_NO_OWNER_ARG)
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.owner = THIS_MODULE,
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#endif
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.open = device_open,
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.release = device_release,
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.unlocked_ioctl = device_ioctl,
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};
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static int __init ioctl_example_init(void)
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{
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/* Allocate major and minor numbers */
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alloc_chrdev_region(&dev_num, 0, 1, "ioctl_example");
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/* Initialize the character device structure */
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cdev_init(&cdev, &fops);
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cdev_add(&cdev, dev_num, 1);
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/* Create a device class */
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#if defined(NV_CLASS_CREATE_HAS_NO_OWNER_ARG)
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dev_class = class_create("ioctl_example");
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#else
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dev_class = class_create(THIS_MODULE, "ioctl_example");
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#endif
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device_create(dev_class, NULL, dev_num, NULL, "ioctl_example");
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pr_info("ioctl_example: Module loaded\n");
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return 0;
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}
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static void __exit ioctl_example_exit(void)
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{
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device_destroy(dev_class, dev_num);
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class_destroy(dev_class);
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cdev_del(&cdev);
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unregister_chrdev_region(dev_num, 1);
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pr_info("ioctl_example: Module unloaded\n");
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}
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module_init(ioctl_example_init);
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module_exit(ioctl_example_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Simple IOCTL Example");
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