164 int vmbus_alloc_ring(struct vmbus_channel *newchannel,  in vmbus_alloc_ring()  argument
175 	page = alloc_pages_node(cpu_to_node(newchannel->target_cpu),  in vmbus_alloc_ring()
184 	newchannel->ringbuffer_page = page;  in vmbus_alloc_ring()
185 	newchannel->ringbuffer_pagecount = (send_size + recv_size) >> PAGE_SHIFT;  in vmbus_alloc_ring()
186 	newchannel->ringbuffer_send_offset = send_size >> PAGE_SHIFT;  in vmbus_alloc_ring()
506 static int __vmbus_open(struct vmbus_channel *newchannel,  in __vmbus_open()  argument
512 	struct page *page = newchannel->ringbuffer_page;  in __vmbus_open()
520 	send_pages = newchannel->ringbuffer_send_offset;  in __vmbus_open()
521 	recv_pages = newchannel->ringbuffer_pagecount - send_pages;  in __vmbus_open()
523 	if (newchannel->state != CHANNEL_OPEN_STATE)  in __vmbus_open()
526 	newchannel->state = CHANNEL_OPENING_STATE;  in __vmbus_open()
527 	newchannel->onchannel_callback = onchannelcallback;  in __vmbus_open()
528 	newchannel->channel_callback_context = context;  in __vmbus_open()
530 	err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages);  in __vmbus_open()
534 	err = hv_ringbuffer_init(&newchannel->inbound,  in __vmbus_open()
540 	newchannel->ringbuffer_gpadlhandle = 0;  in __vmbus_open()
542 	err = __vmbus_establish_gpadl(newchannel, HV_GPADL_RING,  in __vmbus_open()
543 				      page_address(newchannel->ringbuffer_page),  in __vmbus_open()
545 				      newchannel->ringbuffer_send_offset << PAGE_SHIFT,  in __vmbus_open()
546 				      &newchannel->ringbuffer_gpadlhandle);  in __vmbus_open()
560 	open_info->waiting_channel = newchannel;  in __vmbus_open()
564 	open_msg->openid = newchannel->offermsg.child_relid;  in __vmbus_open()
565 	open_msg->child_relid = newchannel->offermsg.child_relid;  in __vmbus_open()
566 	open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;  in __vmbus_open()
574 	open_msg->target_vp = hv_cpu_number_to_vp_number(newchannel->target_cpu);  in __vmbus_open()
584 	if (newchannel->rescind) {  in __vmbus_open()
603 	if (newchannel->rescind) {  in __vmbus_open()
613 	newchannel->state = CHANNEL_OPENED_STATE;  in __vmbus_open()
624 	vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);  in __vmbus_open()
625 	newchannel->ringbuffer_gpadlhandle = 0;  in __vmbus_open()
627 	hv_ringbuffer_cleanup(&newchannel->outbound);  in __vmbus_open()
628 	hv_ringbuffer_cleanup(&newchannel->inbound);  in __vmbus_open()
629 	newchannel->state = CHANNEL_OPEN_STATE;  in __vmbus_open()
636 int vmbus_connect_ring(struct vmbus_channel *newchannel,  in vmbus_connect_ring()  argument
639 	return  __vmbus_open(newchannel, NULL, 0, onchannelcallback, context);  in vmbus_connect_ring()
646 int vmbus_open(struct vmbus_channel *newchannel,  in vmbus_open()  argument
653 	err = vmbus_alloc_ring(newchannel, send_ringbuffer_size,  in vmbus_open()
658 	err = __vmbus_open(newchannel, userdata, userdatalen,  in vmbus_open()
661 		vmbus_free_ring(newchannel);  in vmbus_open()