92 void mei_cancel_work(struct mei_device *dev)  in mei_cancel_work()  argument
94 	cancel_work_sync(&dev->init_work);  in mei_cancel_work()
95 	cancel_work_sync(&dev->reset_work);  in mei_cancel_work()
97 	cancel_delayed_work(&dev->timer_work);  in mei_cancel_work()
108 int mei_reset(struct mei_device *dev)  in mei_reset()  argument
110 	enum mei_dev_state state = dev->dev_state;  in mei_reset()
120 		mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ);  in mei_reset()
121 		dev_warn(dev->dev, "unexpected reset: dev_state = %s fw status = %s\n",  in mei_reset()
130 	mei_hbm_idle(dev);  in mei_reset()
134 	dev->dev_state = MEI_DEV_RESETTING;  in mei_reset()
136 	dev->reset_count++;  in mei_reset()
137 	if (dev->reset_count > MEI_MAX_CONSEC_RESET) {  in mei_reset()
138 		dev_err(dev->dev, "reset: reached maximal consecutive resets: disabling the device\n");  in mei_reset()
139 		dev->dev_state = MEI_DEV_DISABLED;  in mei_reset()
143 	ret = mei_hw_reset(dev, interrupts_enabled);  in mei_reset()
151 		mei_cl_all_write_clear(dev);  in mei_reset()
153 		mei_cl_all_disconnect(dev);  in mei_reset()
156 		mei_cl_all_wakeup(dev);  in mei_reset()
159 		dev_dbg(dev->dev, "remove iamthif and wd from the file list.\n");  in mei_reset()
160 		mei_cl_unlink(&dev->wd_cl);  in mei_reset()
161 		mei_cl_unlink(&dev->iamthif_cl);  in mei_reset()
162 		mei_amthif_reset_params(dev);  in mei_reset()
165 	mei_hbm_reset(dev);  in mei_reset()
167 	dev->rd_msg_hdr = 0;  in mei_reset()
168 	dev->wd_pending = false;  in mei_reset()
171 		dev_err(dev->dev, "hw_reset failed ret = %d\n", ret);  in mei_reset()
176 		dev_dbg(dev->dev, "powering down: end of reset\n");  in mei_reset()
177 		dev->dev_state = MEI_DEV_DISABLED;  in mei_reset()
181 	ret = mei_hw_start(dev);  in mei_reset()
183 		dev_err(dev->dev, "hw_start failed ret = %d\n", ret);  in mei_reset()
187 	dev_dbg(dev->dev, "link is established start sending messages.\n");  in mei_reset()
189 	dev->dev_state = MEI_DEV_INIT_CLIENTS;  in mei_reset()
190 	ret = mei_hbm_start_req(dev);  in mei_reset()
192 		dev_err(dev->dev, "hbm_start failed ret = %d\n", ret);  in mei_reset()
193 		dev->dev_state = MEI_DEV_RESETTING;  in mei_reset()
208 int mei_start(struct mei_device *dev)  in mei_start()  argument
212 	mutex_lock(&dev->device_lock);  in mei_start()
215 	mei_clear_interrupts(dev);  in mei_start()
217 	mei_hw_config(dev);  in mei_start()
219 	dev_dbg(dev->dev, "reset in start the mei device.\n");  in mei_start()
221 	dev->reset_count = 0;  in mei_start()
223 		dev->dev_state = MEI_DEV_INITIALIZING;  in mei_start()
224 		ret = mei_reset(dev);  in mei_start()
226 		if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_start()
227 			dev_err(dev->dev, "reset failed ret = %d", ret);  in mei_start()
233 	if (dev->dev_state == MEI_DEV_DISABLED) {  in mei_start()
234 		dev_err(dev->dev, "reset failed");  in mei_start()
238 	if (mei_hbm_start_wait(dev)) {  in mei_start()
239 		dev_err(dev->dev, "HBM haven't started");  in mei_start()
243 	if (!mei_host_is_ready(dev)) {  in mei_start()
244 		dev_err(dev->dev, "host is not ready.\n");  in mei_start()
248 	if (!mei_hw_is_ready(dev)) {  in mei_start()
249 		dev_err(dev->dev, "ME is not ready.\n");  in mei_start()
253 	if (!mei_hbm_version_is_supported(dev)) {  in mei_start()
254 		dev_dbg(dev->dev, "MEI start failed.\n");  in mei_start()
258 	dev_dbg(dev->dev, "link layer has been established.\n");  in mei_start()
260 	mutex_unlock(&dev->device_lock);  in mei_start()
263 	dev_err(dev->dev, "link layer initialization failed.\n");  in mei_start()
264 	dev->dev_state = MEI_DEV_DISABLED;  in mei_start()
265 	mutex_unlock(&dev->device_lock);  in mei_start()
277 int mei_restart(struct mei_device *dev)  in mei_restart()  argument
281 	mutex_lock(&dev->device_lock);  in mei_restart()
283 	mei_clear_interrupts(dev);  in mei_restart()
285 	dev->dev_state = MEI_DEV_POWER_UP;  in mei_restart()
286 	dev->reset_count = 0;  in mei_restart()
288 	err = mei_reset(dev);  in mei_restart()
290 	mutex_unlock(&dev->device_lock);  in mei_restart()
292 	if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_restart()
293 		dev_err(dev->dev, "device disabled = %d\n", err);  in mei_restart()
299 		schedule_work(&dev->reset_work);  in mei_restart()
308 	struct mei_device *dev =  in mei_reset_work()  local
312 	mutex_lock(&dev->device_lock);  in mei_reset_work()
314 	ret = mei_reset(dev);  in mei_reset_work()
316 	mutex_unlock(&dev->device_lock);  in mei_reset_work()
318 	if (dev->dev_state == MEI_DEV_DISABLED) {  in mei_reset_work()
319 		dev_err(dev->dev, "device disabled = %d\n", ret);  in mei_reset_work()
325 		schedule_work(&dev->reset_work);  in mei_reset_work()
328 void mei_stop(struct mei_device *dev)  in mei_stop()  argument
330 	dev_dbg(dev->dev, "stopping the device.\n");  in mei_stop()
332 	mei_cl_bus_remove_devices(dev);  in mei_stop()
334 	mei_cancel_work(dev);  in mei_stop()
336 	mutex_lock(&dev->device_lock);  in mei_stop()
338 	mei_wd_stop(dev);  in mei_stop()
340 	dev->dev_state = MEI_DEV_POWER_DOWN;  in mei_stop()
341 	mei_reset(dev);  in mei_stop()
343 	dev->dev_state = MEI_DEV_DISABLED;  in mei_stop()
345 	mutex_unlock(&dev->device_lock);  in mei_stop()
347 	mei_watchdog_unregister(dev);  in mei_stop()
358 bool mei_write_is_idle(struct mei_device *dev)  in mei_write_is_idle()  argument
360 	bool idle = (dev->dev_state == MEI_DEV_ENABLED &&  in mei_write_is_idle()
361 		list_empty(&dev->ctrl_wr_list.list) &&  in mei_write_is_idle()
362 		list_empty(&dev->write_list.list)   &&  in mei_write_is_idle()
363 		list_empty(&dev->write_waiting_list.list));  in mei_write_is_idle()
365 	dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n",  in mei_write_is_idle()
367 		mei_dev_state_str(dev->dev_state),  in mei_write_is_idle()
368 		list_empty(&dev->ctrl_wr_list.list),  in mei_write_is_idle()
369 		list_empty(&dev->write_list.list),  in mei_write_is_idle()
370 		list_empty(&dev->write_waiting_list.list));  in mei_write_is_idle()
383 void mei_device_init(struct mei_device *dev,  in mei_device_init()  argument
388 	INIT_LIST_HEAD(&dev->file_list);  in mei_device_init()
389 	INIT_LIST_HEAD(&dev->device_list);  in mei_device_init()
390 	INIT_LIST_HEAD(&dev->me_clients);  in mei_device_init()
391 	mutex_init(&dev->device_lock);  in mei_device_init()
392 	init_rwsem(&dev->me_clients_rwsem);  in mei_device_init()
393 	mutex_init(&dev->cl_bus_lock);  in mei_device_init()
394 	init_waitqueue_head(&dev->wait_hw_ready);  in mei_device_init()
395 	init_waitqueue_head(&dev->wait_pg);  in mei_device_init()
396 	init_waitqueue_head(&dev->wait_hbm_start);  in mei_device_init()
397 	init_waitqueue_head(&dev->wait_stop_wd);  in mei_device_init()
398 	dev->dev_state = MEI_DEV_INITIALIZING;  in mei_device_init()
399 	dev->reset_count = 0;  in mei_device_init()
401 	mei_io_list_init(&dev->write_list);  in mei_device_init()
402 	mei_io_list_init(&dev->write_waiting_list);  in mei_device_init()
403 	mei_io_list_init(&dev->ctrl_wr_list);  in mei_device_init()
404 	mei_io_list_init(&dev->ctrl_rd_list);  in mei_device_init()
406 	INIT_DELAYED_WORK(&dev->timer_work, mei_timer);  in mei_device_init()
407 	INIT_WORK(&dev->init_work, mei_host_client_init);  in mei_device_init()
408 	INIT_WORK(&dev->reset_work, mei_reset_work);  in mei_device_init()
410 	INIT_LIST_HEAD(&dev->wd_cl.link);  in mei_device_init()
411 	INIT_LIST_HEAD(&dev->iamthif_cl.link);  in mei_device_init()
412 	mei_io_list_init(&dev->amthif_cmd_list);  in mei_device_init()
413 	mei_io_list_init(&dev->amthif_rd_complete_list);  in mei_device_init()
415 	bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);  in mei_device_init()
416 	dev->open_handle_count = 0;  in mei_device_init()
422 	bitmap_set(dev->host_clients_map, 0, 1);  in mei_device_init()
424 	dev->pg_event = MEI_PG_EVENT_IDLE;  in mei_device_init()
425 	dev->ops      = hw_ops;  in mei_device_init()
426 	dev->dev      = device;  in mei_device_init()