Can't Read Data from Custom componet (Avalon mm)

--- Quote Start ---

Which DMA controller is it? Altera provides drivers with C functions that you can use to configure the DMA.

--- Quote End ---

It's altera avalon DMA. Configuration of SOPC is shown in the figure. Can I access it like this, (where IMM_x, is the image of my custom made design)

--- Quote Start ---

alt_dma_txchan txchan;

void* tx_data_to = IMM_X_BASE; //is it correct???????

alt_dma_txchan_ioctl(txchan, ALT_DMA_SET_MODE_32, NULL);

alt_dma_txchan_ioctl(txchan, ALT_DMA_TX_ONLY_ON, tx_data_to);

alt_dma_txchan_ioctl(txchan, ALT_DMA_RX_ONLY_OFF, NULL);

--- Quote End ---