92 void mei_cancel_work(struct mei_device *dev)  in mei_cancel_work()  argument
94 	cancel_work_sync(&dev->reset_work);  in mei_cancel_work()
95 	cancel_work_sync(&dev->bus_rescan_work);  in mei_cancel_work()
97 	cancel_delayed_work_sync(&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()
125 	mei_clear_interrupts(dev);  in mei_reset()
132 	mei_hbm_idle(dev);  in mei_reset()
136 	dev->dev_state = MEI_DEV_RESETTING;  in mei_reset()
138 	dev->reset_count++;  in mei_reset()
139 	if (dev->reset_count > MEI_MAX_CONSEC_RESET) {  in mei_reset()
140 		dev_err(dev->dev, "reset: reached maximal consecutive resets: disabling the device\n");  in mei_reset()
141 		dev->dev_state = MEI_DEV_DISABLED;  in mei_reset()
145 	ret = mei_hw_reset(dev, interrupts_enabled);  in mei_reset()
150 		mei_cl_all_disconnect(dev);  in mei_reset()
152 	mei_hbm_reset(dev);  in mei_reset()
154 	dev->rd_msg_hdr = 0;  in mei_reset()
157 		dev_err(dev->dev, "hw_reset failed ret = %d\n", ret);  in mei_reset()
162 		dev_dbg(dev->dev, "powering down: end of reset\n");  in mei_reset()
163 		dev->dev_state = MEI_DEV_DISABLED;  in mei_reset()
167 	ret = mei_hw_start(dev);  in mei_reset()
169 		dev_err(dev->dev, "hw_start failed ret = %d\n", ret);  in mei_reset()
173 	dev_dbg(dev->dev, "link is established start sending messages.\n");  in mei_reset()
175 	dev->dev_state = MEI_DEV_INIT_CLIENTS;  in mei_reset()
176 	ret = mei_hbm_start_req(dev);  in mei_reset()
178 		dev_err(dev->dev, "hbm_start failed ret = %d\n", ret);  in mei_reset()
179 		dev->dev_state = MEI_DEV_RESETTING;  in mei_reset()
194 int mei_start(struct mei_device *dev)  in mei_start()  argument
198 	mutex_lock(&dev->device_lock);  in mei_start()
201 	mei_clear_interrupts(dev);  in mei_start()
203 	mei_hw_config(dev);  in mei_start()
205 	dev_dbg(dev->dev, "reset in start the mei device.\n");  in mei_start()
207 	dev->reset_count = 0;  in mei_start()
209 		dev->dev_state = MEI_DEV_INITIALIZING;  in mei_start()
210 		ret = mei_reset(dev);  in mei_start()
212 		if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_start()
213 			dev_err(dev->dev, "reset failed ret = %d", ret);  in mei_start()
218 	if (mei_hbm_start_wait(dev)) {  in mei_start()
219 		dev_err(dev->dev, "HBM haven't started");  in mei_start()
223 	if (!mei_host_is_ready(dev)) {  in mei_start()
224 		dev_err(dev->dev, "host is not ready.\n");  in mei_start()
228 	if (!mei_hw_is_ready(dev)) {  in mei_start()
229 		dev_err(dev->dev, "ME is not ready.\n");  in mei_start()
233 	if (!mei_hbm_version_is_supported(dev)) {  in mei_start()
234 		dev_dbg(dev->dev, "MEI start failed.\n");  in mei_start()
238 	dev_dbg(dev->dev, "link layer has been established.\n");  in mei_start()
240 	mutex_unlock(&dev->device_lock);  in mei_start()
243 	dev_err(dev->dev, "link layer initialization failed.\n");  in mei_start()
244 	dev->dev_state = MEI_DEV_DISABLED;  in mei_start()
245 	mutex_unlock(&dev->device_lock);  in mei_start()
257 int mei_restart(struct mei_device *dev)  in mei_restart()  argument
261 	mutex_lock(&dev->device_lock);  in mei_restart()
263 	dev->dev_state = MEI_DEV_POWER_UP;  in mei_restart()
264 	dev->reset_count = 0;  in mei_restart()
266 	err = mei_reset(dev);  in mei_restart()
268 	mutex_unlock(&dev->device_lock);  in mei_restart()
270 	if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_restart()
271 		dev_err(dev->dev, "device disabled = %d\n", err);  in mei_restart()
277 		schedule_work(&dev->reset_work);  in mei_restart()
286 	struct mei_device *dev =  in mei_reset_work()  local
290 	mei_clear_interrupts(dev);  in mei_reset_work()
291 	mei_synchronize_irq(dev);  in mei_reset_work()
293 	mutex_lock(&dev->device_lock);  in mei_reset_work()
295 	ret = mei_reset(dev);  in mei_reset_work()
297 	mutex_unlock(&dev->device_lock);  in mei_reset_work()
299 	if (dev->dev_state == MEI_DEV_DISABLED) {  in mei_reset_work()
300 		dev_err(dev->dev, "device disabled = %d\n", ret);  in mei_reset_work()
306 		schedule_work(&dev->reset_work);  in mei_reset_work()
309 void mei_stop(struct mei_device *dev)  in mei_stop()  argument
311 	dev_dbg(dev->dev, "stopping the device.\n");  in mei_stop()
313 	mutex_lock(&dev->device_lock);  in mei_stop()
314 	dev->dev_state = MEI_DEV_POWER_DOWN;  in mei_stop()
315 	mutex_unlock(&dev->device_lock);  in mei_stop()
316 	mei_cl_bus_remove_devices(dev);  in mei_stop()
318 	mei_cancel_work(dev);  in mei_stop()
320 	mei_clear_interrupts(dev);  in mei_stop()
321 	mei_synchronize_irq(dev);  in mei_stop()
323 	mutex_lock(&dev->device_lock);  in mei_stop()
325 	mei_reset(dev);  in mei_stop()
327 	dev->dev_state = MEI_DEV_DISABLED;  in mei_stop()
329 	mutex_unlock(&dev->device_lock);  in mei_stop()
340 bool mei_write_is_idle(struct mei_device *dev)  in mei_write_is_idle()  argument
342 	bool idle = (dev->dev_state == MEI_DEV_ENABLED &&  in mei_write_is_idle()
343 		list_empty(&dev->ctrl_wr_list) &&  in mei_write_is_idle()
344 		list_empty(&dev->write_list)   &&  in mei_write_is_idle()
345 		list_empty(&dev->write_waiting_list));  in mei_write_is_idle()
347 	dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n",  in mei_write_is_idle()
349 		mei_dev_state_str(dev->dev_state),  in mei_write_is_idle()
350 		list_empty(&dev->ctrl_wr_list),  in mei_write_is_idle()
351 		list_empty(&dev->write_list),  in mei_write_is_idle()
352 		list_empty(&dev->write_waiting_list));  in mei_write_is_idle()
365 void mei_device_init(struct mei_device *dev,  in mei_device_init()  argument
370 	INIT_LIST_HEAD(&dev->file_list);  in mei_device_init()
371 	INIT_LIST_HEAD(&dev->device_list);  in mei_device_init()
372 	INIT_LIST_HEAD(&dev->me_clients);  in mei_device_init()
373 	mutex_init(&dev->device_lock);  in mei_device_init()
374 	init_rwsem(&dev->me_clients_rwsem);  in mei_device_init()
375 	mutex_init(&dev->cl_bus_lock);  in mei_device_init()
376 	init_waitqueue_head(&dev->wait_hw_ready);  in mei_device_init()
377 	init_waitqueue_head(&dev->wait_pg);  in mei_device_init()
378 	init_waitqueue_head(&dev->wait_hbm_start);  in mei_device_init()
379 	dev->dev_state = MEI_DEV_INITIALIZING;  in mei_device_init()
380 	dev->reset_count = 0;  in mei_device_init()
382 	INIT_LIST_HEAD(&dev->write_list);  in mei_device_init()
383 	INIT_LIST_HEAD(&dev->write_waiting_list);  in mei_device_init()
384 	INIT_LIST_HEAD(&dev->ctrl_wr_list);  in mei_device_init()
385 	INIT_LIST_HEAD(&dev->ctrl_rd_list);  in mei_device_init()
386 	dev->tx_queue_limit = MEI_TX_QUEUE_LIMIT_DEFAULT;  in mei_device_init()
388 	INIT_DELAYED_WORK(&dev->timer_work, mei_timer);  in mei_device_init()
389 	INIT_WORK(&dev->reset_work, mei_reset_work);  in mei_device_init()
390 	INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work);  in mei_device_init()
392 	bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);  in mei_device_init()
393 	dev->open_handle_count = 0;  in mei_device_init()
399 	bitmap_set(dev->host_clients_map, 0, 1);  in mei_device_init()
401 	dev->pg_event = MEI_PG_EVENT_IDLE;  in mei_device_init()
402 	dev->ops      = hw_ops;  in mei_device_init()
403 	dev->dev      = device;  in mei_device_init()