intel_guc_ct_buffer
static int ctb_write(struct intel_guc_ct_buffer *ctb,
struct intel_guc_ct_buffer *ctb = &ctch->ctbs[CTB_SEND];
static int ctb_read(struct intel_guc_ct_buffer *ctb, u32 *data)
struct intel_guc_ct_buffer *ctb = &ctch->ctbs[CTB_RECV];
struct intel_guc_ct_buffer ctbs[2];