1 // SPDX-License-Identifier: GPL-2.0
6 #include "ufs-debugfs.h"
8 #include "ufshcd-priv.h"
18 /* @file corresponds to a debugfs attribute in directory hba->debugfs_root. */
21 	return d_inode(file->f_path.dentry->d_parent)->i_private;  in hba_from_file()
36 	struct ufs_hba *hba = hba_from_file(s->file);  in ufs_debugfs_stats_show()
37 	struct ufs_event_hist *e = hba->ufs_stats.event;  in ufs_debugfs_stats_show()
47 	PRT("Auto-hibernate errors: %llu\n", AUTO_HIBERN8_ERR);  in ufs_debugfs_stats_show()
50 	PRT("PM Resume errors: %llu\n", RESUME_ERR);  in ufs_debugfs_stats_show()
51 	PRT("PM Suspend errors : %llu\n", SUSPEND_ERR);  in ufs_debugfs_stats_show()
64 	*val = hba->ee_usr_mask;  in ee_usr_mask_get()
69 __acquires(&hba->host_sem)  in ufs_debugfs_get_user_access()
71 	down(&hba->host_sem);  in ufs_debugfs_get_user_access()
73 		up(&hba->host_sem);  in ufs_debugfs_get_user_access()
74 		return -EBUSY;  in ufs_debugfs_get_user_access()
81 __releases(&hba->host_sem)  in ufs_debugfs_put_user_access()
84 	up(&hba->host_sem);  in ufs_debugfs_put_user_access()
93 		return -EINVAL;  in ee_usr_mask_set()
110 	if (!hba->debugfs_ee_rate_limit_ms || !status)  in ufs_debugfs_exception_event()
113 	mutex_lock(&hba->ee_ctrl_mutex);  in ufs_debugfs_exception_event()
114 	ee_ctrl_mask = hba->ee_drv_mask | (hba->ee_usr_mask & ~status);  in ufs_debugfs_exception_event()
115 	chgd = ee_ctrl_mask != hba->ee_ctrl_mask;  in ufs_debugfs_exception_event()
119 			dev_err(hba->dev, "%s: failed to write ee control %d\n",  in ufs_debugfs_exception_event()
122 	mutex_unlock(&hba->ee_ctrl_mutex);  in ufs_debugfs_exception_event()
125 		unsigned long delay = msecs_to_jiffies(hba->debugfs_ee_rate_limit_ms);  in ufs_debugfs_exception_event()
127 		queue_delayed_work(system_freezable_wq, &hba->debugfs_ee_work, delay);  in ufs_debugfs_exception_event()
135 	if (!hba->ee_usr_mask || pm_runtime_suspended(hba->dev) ||  in ufs_debugfs_restart_ee()
144 	struct ufs_debugfs_attr *attr = s->private;  in ufs_saved_err_show()
145 	struct ufs_hba *hba = hba_from_file(s->file);  in ufs_saved_err_show()
148 	if (strcmp(attr->name, "saved_err") == 0) {  in ufs_saved_err_show()
149 		p = &hba->saved_err;  in ufs_saved_err_show()
150 	} else if (strcmp(attr->name, "saved_uic_err") == 0) {  in ufs_saved_err_show()
151 		p = &hba->saved_uic_err;  in ufs_saved_err_show()
153 		return -ENOENT;  in ufs_saved_err_show()
163 	struct ufs_debugfs_attr *attr = file->f_inode->i_private;  in ufs_saved_err_write()
169 		return -EINVAL;  in ufs_saved_err_write()
171 		return -EFAULT;  in ufs_saved_err_write()
176 	spin_lock_irq(hba->host->host_lock);  in ufs_saved_err_write()
177 	if (strcmp(attr->name, "saved_err") == 0) {  in ufs_saved_err_write()
178 		hba->saved_err = val;  in ufs_saved_err_write()
179 	} else if (strcmp(attr->name, "saved_uic_err") == 0) {  in ufs_saved_err_write()
180 		hba->saved_uic_err = val;  in ufs_saved_err_write()
182 		ret = -ENOENT;  in ufs_saved_err_write()
186 	spin_unlock_irq(hba->host->host_lock);  in ufs_saved_err_write()
193 	return single_open(file, ufs_saved_err_show, inode->i_private);  in ufs_saved_err_open()
218 	hba->debugfs_ee_rate_limit_ms = 20;  in ufs_debugfs_hba_init()
219 	INIT_DELAYED_WORK(&hba->debugfs_ee_work, ufs_debugfs_restart_ee);  in ufs_debugfs_hba_init()
221 	root = debugfs_create_dir(dev_name(hba->dev), ufs_debugfs_root);  in ufs_debugfs_hba_init()
224 	hba->debugfs_root = root;  in ufs_debugfs_hba_init()
225 	d_inode(root)->i_private = hba;  in ufs_debugfs_hba_init()
226 	for (attr = ufs_attrs; attr->name; attr++)  in ufs_debugfs_hba_init()
227 		debugfs_create_file(attr->name, attr->mode, root, (void *)attr,  in ufs_debugfs_hba_init()
228 				    attr->fops);  in ufs_debugfs_hba_init()
229 	debugfs_create_file("exception_event_mask", 0600, hba->debugfs_root,  in ufs_debugfs_hba_init()
231 	debugfs_create_u32("exception_event_rate_limit_ms", 0600, hba->debugfs_root,  in ufs_debugfs_hba_init()
232 			   &hba->debugfs_ee_rate_limit_ms);  in ufs_debugfs_hba_init()
237 	debugfs_remove_recursive(hba->debugfs_root);  in ufs_debugfs_hba_exit()
238 	cancel_delayed_work_sync(&hba->debugfs_ee_work);  in ufs_debugfs_hba_exit()