35 	struct hvc_xen_data *hvc_data = dev->data;  in read_from_ring()  local
36 	XENCONS_RING_IDX cons = hvc_data->intf->in_cons;  in read_from_ring()
37 	XENCONS_RING_IDX prod = hvc_data->intf->in_prod;  in read_from_ring()
41 	__ASSERT((prod - cons) <= sizeof(hvc_data->intf->in),  in read_from_ring()
45 		in_idx = MASK_XENCONS_IDX(cons, hvc_data->intf->in);  in read_from_ring()
46 		str[recv] = hvc_data->intf->in[in_idx];  in read_from_ring()
52 	hvc_data->intf->in_cons = cons;  in read_from_ring()
54 	notify_evtchn(hvc_data->evtchn);  in read_from_ring()
61 	struct hvc_xen_data *hvc_data = dev->data;  in write_to_ring()  local
62 	XENCONS_RING_IDX cons = hvc_data->intf->out_cons;  in write_to_ring()
63 	XENCONS_RING_IDX prod = hvc_data->intf->out_prod;  in write_to_ring()
67 	__ASSERT((prod - cons) <= sizeof(hvc_data->intf->out),  in write_to_ring()
70 	while ((sent < len) && ((prod - cons) < sizeof(hvc_data->intf->out))) {  in write_to_ring()
71 		out_idx = MASK_XENCONS_IDX(prod, hvc_data->intf->out);  in write_to_ring()
72 		hvc_data->intf->out[out_idx] = str[sent];  in write_to_ring()
78 	hvc_data->intf->out_prod = prod;  in write_to_ring()
81 		notify_evtchn(hvc_data->evtchn);  in write_to_ring()