snd_sof_mailbox   395 sound/soc/sof/sof-priv.h 	struct snd_sof_mailbox dsp_box;		/* DSP initiated IPC */
snd_sof_mailbox   396 sound/soc/sof/sof-priv.h 	struct snd_sof_mailbox host_box;	/* Host initiated IPC */
snd_sof_mailbox   397 sound/soc/sof/sof-priv.h 	struct snd_sof_mailbox stream_box;	/* Stream position update */