1 // SPDX-License-Identifier: GPL-2.0-only
28 #define SD_VERSION_3_1	(SD_MAJOR << 16 | SD_MINOR_1)
29 #define SD_VERSION_3_2	(SD_MAJOR << 16 | SD_MINOR_2)
30 #define SD_VERSION	(SD_MAJOR << 16 | SD_MINOR)
33 #define SD_VERSION_1	(SD_MAJOR_1 << 16 | SD_MINOR)
37 #define TS_VERSION	(TS_MAJOR << 16 | TS_MINOR)
40 #define TS_VERSION_1	(TS_MAJOR_1 << 16 | TS_MINOR)
43 #define TS_VERSION_3	(TS_MAJOR_3 << 16 | TS_MINOR)
47 #define HB_VERSION	(HB_MAJOR << 16 | HB_MINOR)
50 #define HB_VERSION_1	(HB_MAJOR_1 << 16 | HB_MINOR)
101 	kobject_uevent_env(&ctx->dev->device.kobj, KOBJ_CHANGE, uevent_env);  in send_hibernate_uevent()
108 	struct vmbus_channel *channel = srv->channel;  in hv_shutdown_init()  local
111 	hibernate_context.dev = channel->device_obj;  in hv_shutdown_init()
181 	struct vmbus_channel *channel = context;  in shutdown_onchannelcallback()  local
191 	if (vmbus_recvpacket(channel, shut_txf_buf, HV_HYP_PAGE_SIZE, &recvlen, &requestid)) {  in shutdown_onchannelcallback()
208 	if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {  in shutdown_onchannelcallback()
215 				sd_srv_version >> 16,  in shutdown_onchannelcallback()
218 	} else if (icmsghdrp->icmsgtype == ICMSGTYPE_SHUTDOWN) {  in shutdown_onchannelcallback()
229 		 * shutdown_msg->flags can be 0(shut down), 2(reboot),  in shutdown_onchannelcallback()
230 		 * or 4(hibernate). It may bitwise-OR 1, which means  in shutdown_onchannelcallback()
234 		switch (shutdown_msg->flags) {  in shutdown_onchannelcallback()
237 			icmsghdrp->status = HV_S_OK;  in shutdown_onchannelcallback()
239 			pr_info("Shutdown request received - graceful shutdown initiated\n");  in shutdown_onchannelcallback()
243 			icmsghdrp->status = HV_S_OK;  in shutdown_onchannelcallback()
245 			pr_info("Restart request received - graceful restart initiated\n");  in shutdown_onchannelcallback()
250 			icmsghdrp->status = hibernation_supported ?  in shutdown_onchannelcallback()
256 			icmsghdrp->status = HV_E_FAIL;  in shutdown_onchannelcallback()
257 			pr_info("Shutdown request received - Invalid request\n");  in shutdown_onchannelcallback()
261 		icmsghdrp->status = HV_E_FAIL;  in shutdown_onchannelcallback()
263 				   icmsghdrp->icmsgtype);  in shutdown_onchannelcallback()
266 	icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION  in shutdown_onchannelcallback()
269 	vmbus_sendpacket(channel, shut_txf_buf,  in shutdown_onchannelcallback()
284  * requests by using this data and the current partition-wide time reference
300 	return (reftime - WLTIMEDELTA) * 100;  in reftime_to_ns()
323 	timediff_adj = reftime - host_ts.ref_time;  in hv_get_adj_host_time()
327 		ret = -ESTALE;  in hv_get_adj_host_time()
347  * Due to a bug on Hyper-V hosts, the sync flag may not always be sent on resume.
374  * message after the timesync channel is opened. Since the hv_utils module is
398 	 * TimeSync v4 messages contain reference time (guest's Hyper-V  in adj_guesttime()
404 	host_ts.host_time += (cur_reftime - reftime);  in adj_guesttime()
415  * Time Sync Channel message handler.
419 	struct vmbus_channel *channel = context;  in timesync_onchannelcallback()  local
432 		int ret = vmbus_recvpacket(channel, time_txf_buf,  in timesync_onchannelcallback()
454 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {  in timesync_onchannelcallback()
461 					ts_srv_version >> 16,  in timesync_onchannelcallback()
464 		} else if (icmsghdrp->icmsgtype == ICMSGTYPE_TIMESYNC) {  in timesync_onchannelcallback()
474 				adj_guesttime(refdata->parenttime,  in timesync_onchannelcallback()
475 						refdata->vmreferencetime,  in timesync_onchannelcallback()
476 						refdata->flags);  in timesync_onchannelcallback()
486 				adj_guesttime(timedatap->parenttime,  in timesync_onchannelcallback()
488 					      timedatap->flags);  in timesync_onchannelcallback()
491 			icmsghdrp->status = HV_E_FAIL;  in timesync_onchannelcallback()
493 					   icmsghdrp->icmsgtype);  in timesync_onchannelcallback()
496 		icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION  in timesync_onchannelcallback()
499 		vmbus_sendpacket(channel, time_txf_buf,  in timesync_onchannelcallback()
507  * Every two seconds, Hyper-V send us a heartbeat request message.
508  * we respond to this message, and Hyper-V knows we are alive.
512 	struct vmbus_channel *channel = context;  in heartbeat_onchannelcallback()  local
521 		if (vmbus_recvpacket(channel, hbeat_txf_buf, HV_HYP_PAGE_SIZE,  in heartbeat_onchannelcallback()
540 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {  in heartbeat_onchannelcallback()
548 					hb_srv_version >> 16,  in heartbeat_onchannelcallback()
551 		} else if (icmsghdrp->icmsgtype == ICMSGTYPE_HEARTBEAT) {  in heartbeat_onchannelcallback()
563 			heartbeat_msg->seq_num += 1;  in heartbeat_onchannelcallback()
565 			icmsghdrp->status = HV_E_FAIL;  in heartbeat_onchannelcallback()
567 					   icmsghdrp->icmsgtype);  in heartbeat_onchannelcallback()
570 		icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION  in heartbeat_onchannelcallback()
573 		vmbus_sendpacket(channel, hbeat_txf_buf,  in heartbeat_onchannelcallback()
586 		(struct hv_util_service *)dev_id->driver_data;  in util_probe()
589 	srv->recv_buffer = kmalloc(HV_HYP_PAGE_SIZE * 4, GFP_KERNEL);  in util_probe()
590 	if (!srv->recv_buffer)  in util_probe()
591 		return -ENOMEM;  in util_probe()
592 	srv->channel = dev->channel;  in util_probe()
593 	if (srv->util_init) {  in util_probe()
594 		ret = srv->util_init(srv);  in util_probe()
604 	 * channel.  in util_probe()
606 	set_channel_read_mode(dev->channel, HV_CALL_DIRECT);  in util_probe()
610 	ret = vmbus_open(dev->channel, HV_UTIL_RING_SEND_SIZE,  in util_probe()
611 			 HV_UTIL_RING_RECV_SIZE, NULL, 0, srv->util_cb,  in util_probe()
612 			 dev->channel);  in util_probe()
616 	if (srv->util_init_transport) {  in util_probe()
617 		ret = srv->util_init_transport();  in util_probe()
619 			vmbus_close(dev->channel);  in util_probe()
626 	if (srv->util_deinit)  in util_probe()
627 		srv->util_deinit();  in util_probe()
629 	kfree(srv->recv_buffer);  in util_probe()
637 	if (srv->util_deinit)  in util_remove()
638 		srv->util_deinit();  in util_remove()
639 	vmbus_close(dev->channel);  in util_remove()
640 	kfree(srv->recv_buffer);  in util_remove()
645  * (refer to hibernate() -> freeze_processes()). The userspace is thawed only
653 	if (srv->util_pre_suspend) {  in util_suspend()
654 		ret = srv->util_pre_suspend();  in util_suspend()
659 	vmbus_close(dev->channel);  in util_suspend()
669 	if (srv->util_pre_resume) {  in util_resume()
670 		ret = srv->util_pre_resume();  in util_resume()
675 	ret = vmbus_open(dev->channel, HV_UTIL_RING_SEND_SIZE,  in util_resume()
676 			 HV_UTIL_RING_RECV_SIZE, NULL, 0, srv->util_cb,  in util_resume()
677 			 dev->channel);  in util_resume()
723 	return -EOPNOTSUPP;  in hv_ptp_enable()
728 	return -EOPNOTSUPP;  in hv_ptp_settime()
733 	return -EOPNOTSUPP;  in hv_ptp_adjfine()
737 	return -EOPNOTSUPP;  in hv_ptp_adjtime()
806 	pr_info("De-Registered HyperV Utility Driver\n");  in exit_hyperv_utils()
814 MODULE_DESCRIPTION("Hyper-V Utilities");