Differential D6707 Diff 17344 head/sys/dev/hyperv/vmbus/vmbus.c

Changeset View

Standalone View

head/sys/dev/hyperv/vmbus/vmbus.c

	Show First 20 Lines • Show All 75 Lines • ▼ Show 20 Lines
	static void			static void
	vmbus_msg_task(void *xsc, int pending __unused)			vmbus_msg_task(void *xsc, int pending __unused)
	{			{
	struct vmbus_softc *sc = xsc;			struct vmbus_softc *sc = xsc;
	volatile struct vmbus_message *msg;			volatile struct vmbus_message *msg;

	msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE;			msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE;
	for (;;) {			for (;;) {
	const hv_vmbus_channel_msg_table_entry *entry;
	hv_vmbus_channel_msg_header *hdr;
	hv_vmbus_channel_msg_type msg_type;

	if (msg->msg_type == VMBUS_MSGTYPE_NONE) {			if (msg->msg_type == VMBUS_MSGTYPE_NONE) {
	/* No message */			/* No message */
	break;			break;
	} else if (msg->msg_type != VMBUS_MSGTYPE_CHANNEL) {			} else if (msg->msg_type == VMBUS_MSGTYPE_CHANNEL) {
	/* Not a channel message */			/* Channel message */
	goto handled;			vmbus_chan_msgproc(sc, msg);
	}			}

	/* XXX: update messageHandler interface */
	hdr = __DEVOLATILE(hv_vmbus_channel_msg_header *,
	msg->msg_data);
	msg_type = hdr->message_type;

	if (msg_type >= HV_CHANNEL_MESSAGE_COUNT) {
	printf("VMBUS: unknown message type = %d\n", msg_type);
	goto handled;
	}

	entry = &g_channel_message_table[msg_type];
	if (entry->messageHandler)
	entry->messageHandler(hdr);
	handled:
	msg->msg_type = VMBUS_MSGTYPE_NONE;			msg->msg_type = VMBUS_MSGTYPE_NONE;
	/*			/*
	* Make sure the write to msg_type (i.e. set to			* Make sure the write to msg_type (i.e. set to
	* VMBUS_MSGTYPE_NONE) happens before we read the			* VMBUS_MSGTYPE_NONE) happens before we read the
	* msg_flags and EOMing. Otherwise, the EOMing will			* msg_flags and EOMing. Otherwise, the EOMing will
	* not deliver any more messages since there is no			* not deliver any more messages since there is no
	* empty slot			* empty slot
	*			*
	▲ Show 20 Lines • Show All 647 Lines • Show Last 20 Lines