83 void mei_cancel_work(struct mei_device *dev)  in mei_cancel_work()  argument
85 	cancel_work_sync(&dev->reset_work);  in mei_cancel_work()
86 	cancel_work_sync(&dev->bus_rescan_work);  in mei_cancel_work()
88 	cancel_delayed_work_sync(&dev->timer_work);  in mei_cancel_work()
99 int mei_reset(struct mei_device *dev)  in mei_reset()  argument
101 	enum mei_dev_state state = dev->dev_state;  in mei_reset()
111 		mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ);  in mei_reset()
112 		dev_warn(dev->dev, "unexpected reset: dev_state = %s fw status = %s\n",  in mei_reset()
116 	mei_clear_interrupts(dev);  in mei_reset()
123 	mei_hbm_idle(dev);  in mei_reset()
127 	mei_set_devstate(dev, MEI_DEV_RESETTING);  in mei_reset()
129 	dev->reset_count++;  in mei_reset()
130 	if (dev->reset_count > MEI_MAX_CONSEC_RESET) {  in mei_reset()
131 		dev_err(dev->dev, "reset: reached maximal consecutive resets: disabling the device\n");  in mei_reset()
132 		mei_set_devstate(dev, MEI_DEV_DISABLED);  in mei_reset()
136 	ret = mei_hw_reset(dev, interrupts_enabled);  in mei_reset()
141 		mei_cl_all_disconnect(dev);  in mei_reset()
143 	mei_hbm_reset(dev);  in mei_reset()
145 	memset(dev->rd_msg_hdr, 0, sizeof(dev->rd_msg_hdr));  in mei_reset()
148 		dev_err(dev->dev, "hw_reset failed ret = %d\n", ret);  in mei_reset()
153 		dev_dbg(dev->dev, "powering down: end of reset\n");  in mei_reset()
154 		mei_set_devstate(dev, MEI_DEV_DISABLED);  in mei_reset()
158 	ret = mei_hw_start(dev);  in mei_reset()
160 		dev_err(dev->dev, "hw_start failed ret = %d\n", ret);  in mei_reset()
164 	if (dev->dev_state != MEI_DEV_RESETTING) {  in mei_reset()
165 		dev_dbg(dev->dev, "wrong state = %d on link start\n", dev->dev_state);  in mei_reset()
169 	dev_dbg(dev->dev, "link is established start sending messages.\n");  in mei_reset()
171 	mei_set_devstate(dev, MEI_DEV_INIT_CLIENTS);  in mei_reset()
172 	ret = mei_hbm_start_req(dev);  in mei_reset()
174 		dev_err(dev->dev, "hbm_start failed ret = %d\n", ret);  in mei_reset()
175 		mei_set_devstate(dev, MEI_DEV_RESETTING);  in mei_reset()
190 int mei_start(struct mei_device *dev)  in mei_start()  argument
194 	mutex_lock(&dev->device_lock);  in mei_start()
197 	mei_clear_interrupts(dev);  in mei_start()
199 	ret = mei_hw_config(dev);  in mei_start()
203 	dev_dbg(dev->dev, "reset in start the mei device.\n");  in mei_start()
205 	dev->reset_count = 0;  in mei_start()
207 		mei_set_devstate(dev, MEI_DEV_INITIALIZING);  in mei_start()
208 		ret = mei_reset(dev);  in mei_start()
210 		if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_start()
211 			dev_err(dev->dev, "reset failed ret = %d", ret);  in mei_start()
216 	if (mei_hbm_start_wait(dev)) {  in mei_start()
217 		dev_err(dev->dev, "HBM haven't started");  in mei_start()
221 	if (!mei_hbm_version_is_supported(dev)) {  in mei_start()
222 		dev_dbg(dev->dev, "MEI start failed.\n");  in mei_start()
226 	dev_dbg(dev->dev, "link layer has been established.\n");  in mei_start()
228 	mutex_unlock(&dev->device_lock);  in mei_start()
231 	dev_err(dev->dev, "link layer initialization failed.\n");  in mei_start()
232 	mei_set_devstate(dev, MEI_DEV_DISABLED);  in mei_start()
233 	mutex_unlock(&dev->device_lock);  in mei_start()
245 int mei_restart(struct mei_device *dev)  in mei_restart()  argument
249 	mutex_lock(&dev->device_lock);  in mei_restart()
251 	mei_set_devstate(dev, MEI_DEV_POWER_UP);  in mei_restart()
252 	dev->reset_count = 0;  in mei_restart()
254 	err = mei_reset(dev);  in mei_restart()
256 	mutex_unlock(&dev->device_lock);  in mei_restart()
258 	if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {  in mei_restart()
259 		dev_err(dev->dev, "device disabled = %d\n", err);  in mei_restart()
265 		schedule_work(&dev->reset_work);  in mei_restart()
274 	struct mei_device *dev =  in mei_reset_work()  local
278 	mei_clear_interrupts(dev);  in mei_reset_work()
279 	mei_synchronize_irq(dev);  in mei_reset_work()
281 	mutex_lock(&dev->device_lock);  in mei_reset_work()
283 	ret = mei_reset(dev);  in mei_reset_work()
285 	mutex_unlock(&dev->device_lock);  in mei_reset_work()
287 	if (dev->dev_state == MEI_DEV_DISABLED) {  in mei_reset_work()
288 		dev_err(dev->dev, "device disabled = %d\n", ret);  in mei_reset_work()
294 		schedule_work(&dev->reset_work);  in mei_reset_work()
297 void mei_stop(struct mei_device *dev)  in mei_stop()  argument
299 	dev_dbg(dev->dev, "stopping the device.\n");  in mei_stop()
301 	mutex_lock(&dev->device_lock);  in mei_stop()
302 	mei_set_devstate(dev, MEI_DEV_POWERING_DOWN);  in mei_stop()
303 	mutex_unlock(&dev->device_lock);  in mei_stop()
304 	mei_cl_bus_remove_devices(dev);  in mei_stop()
305 	mutex_lock(&dev->device_lock);  in mei_stop()
306 	mei_set_devstate(dev, MEI_DEV_POWER_DOWN);  in mei_stop()
307 	mutex_unlock(&dev->device_lock);  in mei_stop()
309 	mei_cancel_work(dev);  in mei_stop()
311 	mei_clear_interrupts(dev);  in mei_stop()
312 	mei_synchronize_irq(dev);  in mei_stop()
314 	mei_cancel_work(dev);  in mei_stop()
316 	mutex_lock(&dev->device_lock);  in mei_stop()
318 	mei_reset(dev);  in mei_stop()
320 	mei_set_devstate(dev, MEI_DEV_DISABLED);  in mei_stop()
322 	mutex_unlock(&dev->device_lock);  in mei_stop()
333 bool mei_write_is_idle(struct mei_device *dev)  in mei_write_is_idle()  argument
335 	bool idle = (dev->dev_state == MEI_DEV_ENABLED &&  in mei_write_is_idle()
336 		list_empty(&dev->ctrl_wr_list) &&  in mei_write_is_idle()
337 		list_empty(&dev->write_list)   &&  in mei_write_is_idle()
338 		list_empty(&dev->write_waiting_list));  in mei_write_is_idle()
340 	dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n",  in mei_write_is_idle()
342 		mei_dev_state_str(dev->dev_state),  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()
359 void mei_device_init(struct mei_device *dev,  in mei_device_init()  argument
365 	INIT_LIST_HEAD(&dev->file_list);  in mei_device_init()
366 	INIT_LIST_HEAD(&dev->device_list);  in mei_device_init()
367 	INIT_LIST_HEAD(&dev->me_clients);  in mei_device_init()
368 	mutex_init(&dev->device_lock);  in mei_device_init()
369 	init_rwsem(&dev->me_clients_rwsem);  in mei_device_init()
370 	mutex_init(&dev->cl_bus_lock);  in mei_device_init()
371 	init_waitqueue_head(&dev->wait_hw_ready);  in mei_device_init()
372 	init_waitqueue_head(&dev->wait_pg);  in mei_device_init()
373 	init_waitqueue_head(&dev->wait_hbm_start);  in mei_device_init()
374 	dev->dev_state = MEI_DEV_INITIALIZING;  in mei_device_init()
375 	dev->reset_count = 0;  in mei_device_init()
377 	INIT_LIST_HEAD(&dev->write_list);  in mei_device_init()
378 	INIT_LIST_HEAD(&dev->write_waiting_list);  in mei_device_init()
379 	INIT_LIST_HEAD(&dev->ctrl_wr_list);  in mei_device_init()
380 	INIT_LIST_HEAD(&dev->ctrl_rd_list);  in mei_device_init()
381 	dev->tx_queue_limit = MEI_TX_QUEUE_LIMIT_DEFAULT;  in mei_device_init()
383 	INIT_DELAYED_WORK(&dev->timer_work, mei_timer);  in mei_device_init()
384 	INIT_WORK(&dev->reset_work, mei_reset_work);  in mei_device_init()
385 	INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work);  in mei_device_init()
387 	bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);  in mei_device_init()
388 	dev->open_handle_count = 0;  in mei_device_init()
390 	dev->pxp_mode = MEI_DEV_PXP_DEFAULT;  in mei_device_init()
396 	bitmap_set(dev->host_clients_map, 0, 1);  in mei_device_init()
398 	dev->pg_event = MEI_PG_EVENT_IDLE;  in mei_device_init()
399 	dev->ops      = hw_ops;  in mei_device_init()
400 	dev->dev      = device;  in mei_device_init()
402 	dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT);  in mei_device_init()
403 	dev->timeouts.connect = MEI_CONNECT_TIMEOUT;  in mei_device_init()
404 	dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT;  in mei_device_init()
405 	dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);  in mei_device_init()
406 	dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);  in mei_device_init()
408 		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW);  in mei_device_init()
409 		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW);  in mei_device_init()
410 		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW);  in mei_device_init()
412 		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);  in mei_device_init()
413 		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT);  in mei_device_init()
414 		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT);  in mei_device_init()