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