1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright(c) 2023 Intel Corporation */
3 #include <linux/debugfs.h>
4 #include <linux/fs.h>
5 #include <linux/kernel.h>
6 
7 #include "adf_accel_devices.h"
8 #include "adf_pm_dbgfs.h"
9 
10 static ssize_t pm_status_read(struct file *f, char __user *buf, size_t count,
11 			      loff_t *pos)
12 {
13 	struct adf_accel_dev *accel_dev = file_inode(f)->i_private;
14 	struct adf_pm pm = accel_dev->power_management;
15 
16 	if (pm.print_pm_status)
17 		return pm.print_pm_status(accel_dev, buf, count, pos);
18 
19 	return count;
20 }
21 
22 static const struct file_operations pm_status_fops = {
23 	.owner = THIS_MODULE,
24 	.read = pm_status_read,
25 };
26 
27 void adf_pm_dbgfs_add(struct adf_accel_dev *accel_dev)
28 {
29 	struct adf_pm *pm = &accel_dev->power_management;
30 
31 	if (!pm->present || !pm->print_pm_status)
32 		return;
33 
34 	pm->debugfs_pm_status = debugfs_create_file("pm_status", 0400,
35 						    accel_dev->debugfs_dir,
36 						    accel_dev, &pm_status_fops);
37 }
38 
39 void adf_pm_dbgfs_rm(struct adf_accel_dev *accel_dev)
40 {
41 	struct adf_pm *pm = &accel_dev->power_management;
42 
43 	if (!pm->present)
44 		return;
45 
46 	debugfs_remove(pm->debugfs_pm_status);
47 	pm->debugfs_pm_status = NULL;
48 }
49