ufs/core/ufs-debugfs.c

18 /* @file corresponds to a debugfs attribute in directory hba->debugfs_root. */
36 	struct ufs_hba *hba = hba_from_file(s->file);
37 	struct ufs_event_hist *e = hba->ufs_stats.event;
62 	struct ufs_hba *hba = data;
64 	*val = hba->ee_usr_mask;
68 static int ufs_debugfs_get_user_access(struct ufs_hba *hba)
69 __acquires(&hba->host_sem)
71 	down(&hba->host_sem);
72 	if (!ufshcd_is_user_access_allowed(hba)) {
73 		up(&hba->host_sem);
76 	ufshcd_rpm_get_sync(hba);
80 static void ufs_debugfs_put_user_access(struct ufs_hba *hba)
81 __releases(&hba->host_sem)
83 	ufshcd_rpm_put_sync(hba);
84 	up(&hba->host_sem);
89 	struct ufs_hba *hba = data;
94 	err = ufs_debugfs_get_user_access(hba);
97 	err = ufshcd_update_ee_usr_mask(hba, val, MASK_EE_STATUS);
98 	ufs_debugfs_put_user_access(hba);
104 void ufs_debugfs_exception_event(struct ufs_hba *hba, u16 status)
110 	if (!hba->debugfs_ee_rate_limit_ms || !status)
113 	mutex_lock(&hba->ee_ctrl_mutex);
114 	ee_ctrl_mask = hba->ee_drv_mask | (hba->ee_usr_mask & ~status);
115 	chgd = ee_ctrl_mask != hba->ee_ctrl_mask;
117 		err = __ufshcd_write_ee_control(hba, ee_ctrl_mask);
119 			dev_err(hba->dev, "%s: failed to write ee control %d\n",
122 	mutex_unlock(&hba->ee_ctrl_mutex);
125 		unsigned long delay = msecs_to_jiffies(hba->debugfs_ee_rate_limit_ms);
127 		queue_delayed_work(system_freezable_wq, &hba->debugfs_ee_work, delay);
133 	struct ufs_hba *hba = container_of(work, struct ufs_hba, debugfs_ee_work.work);
135 	if (!hba->ee_usr_mask || pm_runtime_suspended(hba->dev) ||
136 	    ufs_debugfs_get_user_access(hba))
138 	ufshcd_write_ee_control(hba);
139 	ufs_debugfs_put_user_access(hba);
145 	struct ufs_hba *hba = hba_from_file(s->file);
149 		p = &hba->saved_err;
151 		p = &hba->saved_uic_err;
164 	struct ufs_hba *hba = hba_from_file(file);
176 	spin_lock_irq(hba->host->host_lock);
178 		hba->saved_err = val;
180 		hba->saved_uic_err = val;
185 		ufshcd_schedule_eh_work(hba);
186 	spin_unlock_irq(hba->host->host_lock);
212 void ufs_debugfs_hba_init(struct ufs_hba *hba)
218 	hba->debugfs_ee_rate_limit_ms = 20;
219 	INIT_DELAYED_WORK(&hba->debugfs_ee_work, ufs_debugfs_restart_ee);
221 	root = debugfs_create_dir(dev_name(hba->dev), ufs_debugfs_root);
224 	hba->debugfs_root = root;
225 	d_inode(root)->i_private = hba;
229 	debugfs_create_file("exception_event_mask", 0600, hba->debugfs_root,
230 			    hba, &ee_usr_mask_fops);
231 	debugfs_create_u32("exception_event_rate_limit_ms", 0600, hba->debugfs_root,
232 			   &hba->debugfs_ee_rate_limit_ms);
235 void ufs_debugfs_hba_exit(struct ufs_hba *hba)
237 	debugfs_remove_recursive(hba->debugfs_root);
238 	cancel_delayed_work_sync(&hba->debugfs_ee_work);