Please interpret interrupt in EDMA uart API

Hi,

I want to use DMA mode with Uart on DSP C674x on L138 LCDK board. I use biospsp_03.00.01.00 package now. On the User Guide Page 32/228, it has the explanation:

2.4.5 DMA Interrupt Mode
The configurations required for DMA Interrupt mode of operation are:
Instance configuration opMode should be set to Uart_OpMode_DMAINTERRUPT.
Additionally the hwiNumber assigned by the application for the UART CPU events
group should be passed, so that the driver can enable proper interrupts. Also, as part
of chanParams, the handle to the EDMA driver, hEdma, should be passed by the
application.

It seems that the interrupt is from Uart, not from EDMA transmission finished which I expected. Is it true?

Could you explain it to me the steps involved? What can I do with Uart interrupt with EDMA transmission?

Thanks,