IWX_TFD_QUEUE_CB_SIZE
cb_size = IWX_TFD_QUEUE_CB_SIZE(IWX_TX_RING_COUNT);
cmd_v0.cb_size = htole32(IWX_TFD_QUEUE_CB_SIZE(num_slots));
cmd_v3.u.add.cb_size = htole32(IWX_TFD_QUEUE_CB_SIZE(num_slots));
IWX_TFD_QUEUE_CB_SIZE(IWX_TX_RING_COUNT);