101 void mei_hbm_idle(struct mei_device *dev)  in mei_hbm_idle()  argument
103 	dev->init_clients_timer = 0;  in mei_hbm_idle()
104 	dev->hbm_state = MEI_HBM_IDLE;  in mei_hbm_idle()
112 void mei_hbm_reset(struct mei_device *dev)  in mei_hbm_reset()  argument
114 	dev->me_client_index = 0;  in mei_hbm_reset()
116 	mei_me_cl_rm_all(dev);  in mei_hbm_reset()
118 	mei_hbm_idle(dev);  in mei_hbm_reset()
168 int mei_hbm_cl_write(struct mei_device *dev,  in mei_hbm_cl_write()  argument
171 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_cl_write()
174 	mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len);  in mei_hbm_cl_write()
176 	return mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_cl_write()
204 struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf)  in mei_hbm_cl_find_by_cmd()  argument
209 	list_for_each_entry(cl, &dev->file_list, link)  in mei_hbm_cl_find_by_cmd()
223 int mei_hbm_start_wait(struct mei_device *dev)  in mei_hbm_start_wait()  argument
227 	if (dev->hbm_state > MEI_HBM_STARTING)  in mei_hbm_start_wait()
230 	mutex_unlock(&dev->device_lock);  in mei_hbm_start_wait()
231 	ret = wait_event_timeout(dev->wait_hbm_start,  in mei_hbm_start_wait()
232 			dev->hbm_state != MEI_HBM_STARTING,  in mei_hbm_start_wait()
234 	mutex_lock(&dev->device_lock);  in mei_hbm_start_wait()
236 	if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {  in mei_hbm_start_wait()
237 		dev->hbm_state = MEI_HBM_IDLE;  in mei_hbm_start_wait()
238 		dev_err(dev->dev, "waiting for mei start failed\n");  in mei_hbm_start_wait()
251 int mei_hbm_start_req(struct mei_device *dev)  in mei_hbm_start_req()  argument
253 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_start_req()
258 	mei_hbm_reset(dev);  in mei_hbm_start_req()
263 	start_req = (struct hbm_host_version_request *)dev->wr_msg.data;  in mei_hbm_start_req()
269 	dev->hbm_state = MEI_HBM_IDLE;  in mei_hbm_start_req()
270 	ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_start_req()
272 		dev_err(dev->dev, "version message write failed: ret = %d\n",  in mei_hbm_start_req()
277 	dev->hbm_state = MEI_HBM_STARTING;  in mei_hbm_start_req()
278 	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;  in mei_hbm_start_req()
289 static int mei_hbm_enum_clients_req(struct mei_device *dev)  in mei_hbm_enum_clients_req()  argument
291 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_enum_clients_req()
299 	enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;  in mei_hbm_enum_clients_req()
303 	ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_enum_clients_req()
305 		dev_err(dev->dev, "enumeration request write failed: ret = %d.\n",  in mei_hbm_enum_clients_req()
309 	dev->hbm_state = MEI_HBM_ENUM_CLIENTS;  in mei_hbm_enum_clients_req()
310 	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;  in mei_hbm_enum_clients_req()
323 static int mei_hbm_me_cl_add(struct mei_device *dev,  in mei_hbm_me_cl_add()  argument
329 	mei_me_cl_rm_by_uuid(dev, uuid);  in mei_hbm_me_cl_add()
341 	mei_me_cl_add(dev, me_cl);  in mei_hbm_me_cl_add()
354 static int mei_hbm_prop_req(struct mei_device *dev)  in mei_hbm_prop_req()  argument
357 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_prop_req()
363 	next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,  in mei_hbm_prop_req()
364 					  dev->me_client_index);  in mei_hbm_prop_req()
368 		dev->hbm_state = MEI_HBM_STARTED;  in mei_hbm_prop_req()
369 		schedule_work(&dev->init_work);  in mei_hbm_prop_req()
375 	prop_req = (struct hbm_props_request *)dev->wr_msg.data;  in mei_hbm_prop_req()
382 	ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_prop_req()
384 		dev_err(dev->dev, "properties request write failed: ret = %d\n",  in mei_hbm_prop_req()
389 	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;  in mei_hbm_prop_req()
390 	dev->me_client_index = next_client_index;  in mei_hbm_prop_req()
404 int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)  in mei_hbm_pg()  argument
406 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_pg()
411 	if (!dev->hbm_f_pg_supported)  in mei_hbm_pg()
416 	req = (struct hbm_power_gate *)dev->wr_msg.data;  in mei_hbm_pg()
420 	ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_pg()
422 		dev_err(dev->dev, "power gate command write failed.\n");  in mei_hbm_pg()
434 static int mei_hbm_stop_req(struct mei_device *dev)  in mei_hbm_stop_req()  argument
436 	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;  in mei_hbm_stop_req()
438 			(struct hbm_host_stop_request *)dev->wr_msg.data;  in mei_hbm_stop_req()
447 	return mei_write_message(dev, mei_hdr, dev->wr_msg.data);  in mei_hbm_stop_req()
458 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)  in mei_hbm_cl_flow_control_req()  argument
462 	cl_dbg(dev, cl, "sending flow control\n");  in mei_hbm_cl_flow_control_req()
463 	return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len);  in mei_hbm_cl_flow_control_req()
474 static int mei_hbm_add_single_flow_creds(struct mei_device *dev,  in mei_hbm_add_single_flow_creds()  argument
480 	me_cl = mei_me_cl_by_id(dev, flow->me_addr);  in mei_hbm_add_single_flow_creds()
482 		dev_err(dev->dev, "no such me client %d\n",  in mei_hbm_add_single_flow_creds()
493 	dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",  in mei_hbm_add_single_flow_creds()
508 static void mei_hbm_cl_flow_control_res(struct mei_device *dev,  in mei_hbm_cl_flow_control_res()  argument
515 		mei_hbm_add_single_flow_creds(dev, flow_control);  in mei_hbm_cl_flow_control_res()
519 	cl = mei_hbm_cl_find_by_cmd(dev, flow_control);  in mei_hbm_cl_flow_control_res()
522 		cl_dbg(dev, cl, "flow control creds = %d.\n",  in mei_hbm_cl_flow_control_res()
536 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)  in mei_hbm_cl_disconnect_req()  argument
540 	return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len);  in mei_hbm_cl_disconnect_req()
551 int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)  in mei_hbm_cl_disconnect_rsp()  argument
555 	return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len);  in mei_hbm_cl_disconnect_rsp()
566 static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl,  in mei_hbm_cl_disconnect_res()  argument
572 	cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status);  in mei_hbm_cl_disconnect_res()
587 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)  in mei_hbm_cl_connect_req()  argument
591 	return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len);  in mei_hbm_cl_connect_req()
602 static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl,  in mei_hbm_cl_connect_res()  argument
608 	cl_dbg(dev, cl, "hbm: connect response status=%s\n",  in mei_hbm_cl_connect_res()
626 static void mei_hbm_cl_res(struct mei_device *dev,  in mei_hbm_cl_res()  argument
634 	list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {  in mei_hbm_cl_res()
652 		mei_hbm_cl_connect_res(dev, cl, rs);  in mei_hbm_cl_res()
655 		mei_hbm_cl_disconnect_res(dev, cl, rs);  in mei_hbm_cl_res()
675 static int mei_hbm_fw_disconnect_req(struct mei_device *dev,  in mei_hbm_fw_disconnect_req()  argument
681 	cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req);  in mei_hbm_fw_disconnect_req()
683 		cl_dbg(dev, cl, "disconnect request received\n");  in mei_hbm_fw_disconnect_req()
690 		cl_dbg(dev, cl, "add disconnect response as first\n");  in mei_hbm_fw_disconnect_req()
691 		list_add(&cb->list, &dev->ctrl_wr_list.list);  in mei_hbm_fw_disconnect_req()
702 static void mei_hbm_config_features(struct mei_device *dev)  in mei_hbm_config_features()  argument
705 	dev->hbm_f_pg_supported = 0;  in mei_hbm_config_features()
706 	if (dev->version.major_version > HBM_MAJOR_VERSION_PGI)  in mei_hbm_config_features()
707 		dev->hbm_f_pg_supported = 1;  in mei_hbm_config_features()
709 	if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&  in mei_hbm_config_features()
710 	    dev->version.minor_version >= HBM_MINOR_VERSION_PGI)  in mei_hbm_config_features()
711 		dev->hbm_f_pg_supported = 1;  in mei_hbm_config_features()
721 bool mei_hbm_version_is_supported(struct mei_device *dev)  in mei_hbm_version_is_supported()  argument
723 	return	(dev->version.major_version < HBM_MAJOR_VERSION) ||  in mei_hbm_version_is_supported()
724 		(dev->version.major_version == HBM_MAJOR_VERSION &&  in mei_hbm_version_is_supported()
725 		 dev->version.minor_version <= HBM_MINOR_VERSION);  in mei_hbm_version_is_supported()
737 int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)  in mei_hbm_dispatch()  argument
749 	BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));  in mei_hbm_dispatch()
750 	mei_read_slots(dev, dev->rd_msg_buf, hdr->length);  in mei_hbm_dispatch()
751 	mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;  in mei_hbm_dispatch()
757 	if (dev->hbm_state == MEI_HBM_IDLE) {  in mei_hbm_dispatch()
758 		dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n");  in mei_hbm_dispatch()
764 		dev_dbg(dev->dev, "hbm: start: response message received.\n");  in mei_hbm_dispatch()
766 		dev->init_clients_timer = 0;  in mei_hbm_dispatch()
770 		dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n",  in mei_hbm_dispatch()
776 			dev->version.major_version = HBM_MAJOR_VERSION;  in mei_hbm_dispatch()
777 			dev->version.minor_version = HBM_MINOR_VERSION;  in mei_hbm_dispatch()
779 			dev->version.major_version =  in mei_hbm_dispatch()
781 			dev->version.minor_version =  in mei_hbm_dispatch()
785 		if (!mei_hbm_version_is_supported(dev)) {  in mei_hbm_dispatch()
786 			dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n");  in mei_hbm_dispatch()
788 			dev->hbm_state = MEI_HBM_STOPPED;  in mei_hbm_dispatch()
789 			if (mei_hbm_stop_req(dev)) {  in mei_hbm_dispatch()
790 				dev_err(dev->dev, "hbm: start: failed to send stop request\n");  in mei_hbm_dispatch()
796 		mei_hbm_config_features(dev);  in mei_hbm_dispatch()
798 		if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||  in mei_hbm_dispatch()
799 		    dev->hbm_state != MEI_HBM_STARTING) {  in mei_hbm_dispatch()
800 			dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n",  in mei_hbm_dispatch()
801 				dev->dev_state, dev->hbm_state);  in mei_hbm_dispatch()
805 		if (mei_hbm_enum_clients_req(dev)) {  in mei_hbm_dispatch()
806 			dev_err(dev->dev, "hbm: start: failed to send enumeration request\n");  in mei_hbm_dispatch()
810 		wake_up(&dev->wait_hbm_start);  in mei_hbm_dispatch()
814 		dev_dbg(dev->dev, "hbm: client connect response: message received.\n");  in mei_hbm_dispatch()
815 		mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT);  in mei_hbm_dispatch()
819 		dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n");  in mei_hbm_dispatch()
820 		mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT);  in mei_hbm_dispatch()
824 		dev_dbg(dev->dev, "hbm: client flow control response: message received.\n");  in mei_hbm_dispatch()
827 		mei_hbm_cl_flow_control_res(dev, flow_control);  in mei_hbm_dispatch()
831 		dev_dbg(dev->dev, "power gate isolation entry response received\n");  in mei_hbm_dispatch()
832 		dev->pg_event = MEI_PG_EVENT_RECEIVED;  in mei_hbm_dispatch()
833 		if (waitqueue_active(&dev->wait_pg))  in mei_hbm_dispatch()
834 			wake_up(&dev->wait_pg);  in mei_hbm_dispatch()
838 		dev_dbg(dev->dev, "power gate isolation exit request received\n");  in mei_hbm_dispatch()
839 		dev->pg_event = MEI_PG_EVENT_RECEIVED;  in mei_hbm_dispatch()
840 		if (waitqueue_active(&dev->wait_pg))  in mei_hbm_dispatch()
841 			wake_up(&dev->wait_pg);  in mei_hbm_dispatch()
848 			pm_request_resume(dev->dev);  in mei_hbm_dispatch()
852 		dev_dbg(dev->dev, "hbm: properties response: message received.\n");  in mei_hbm_dispatch()
854 		dev->init_clients_timer = 0;  in mei_hbm_dispatch()
856 		if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||  in mei_hbm_dispatch()
857 		    dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {  in mei_hbm_dispatch()
858 			dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",  in mei_hbm_dispatch()
859 				dev->dev_state, dev->hbm_state);  in mei_hbm_dispatch()
866 			dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n",  in mei_hbm_dispatch()
872 		mei_hbm_me_cl_add(dev, props_res);  in mei_hbm_dispatch()
874 		dev->me_client_index++;  in mei_hbm_dispatch()
877 		if (mei_hbm_prop_req(dev))  in mei_hbm_dispatch()
883 		dev_dbg(dev->dev, "hbm: enumeration response: message received\n");  in mei_hbm_dispatch()
885 		dev->init_clients_timer = 0;  in mei_hbm_dispatch()
888 		BUILD_BUG_ON(sizeof(dev->me_clients_map)  in mei_hbm_dispatch()
890 		memcpy(dev->me_clients_map, enum_res->valid_addresses,  in mei_hbm_dispatch()
893 		if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||  in mei_hbm_dispatch()
894 		    dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {  in mei_hbm_dispatch()
895 			dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n",  in mei_hbm_dispatch()
896 				dev->dev_state, dev->hbm_state);  in mei_hbm_dispatch()
900 		dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;  in mei_hbm_dispatch()
903 		if (mei_hbm_prop_req(dev))  in mei_hbm_dispatch()
909 		dev_dbg(dev->dev, "hbm: stop response: message received\n");  in mei_hbm_dispatch()
911 		dev->init_clients_timer = 0;  in mei_hbm_dispatch()
913 		if (dev->hbm_state != MEI_HBM_STOPPED) {  in mei_hbm_dispatch()
914 			dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n",  in mei_hbm_dispatch()
915 				dev->dev_state, dev->hbm_state);  in mei_hbm_dispatch()
919 		dev->dev_state = MEI_DEV_POWER_DOWN;  in mei_hbm_dispatch()
920 		dev_info(dev->dev, "hbm: stop response: resetting.\n");  in mei_hbm_dispatch()
926 		dev_dbg(dev->dev, "hbm: disconnect request: message received\n");  in mei_hbm_dispatch()
929 		mei_hbm_fw_disconnect_req(dev, disconnect_req);  in mei_hbm_dispatch()
933 		dev_dbg(dev->dev, "hbm: stop request: message received\n");  in mei_hbm_dispatch()
934 		dev->hbm_state = MEI_HBM_STOPPED;  in mei_hbm_dispatch()
935 		if (mei_hbm_stop_req(dev)) {  in mei_hbm_dispatch()
936 			dev_err(dev->dev, "hbm: stop request: failed to send stop request\n");  in mei_hbm_dispatch()