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DMA Host to Target Readout Partial Data

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I am new to the Host to Target DMA FIFOs

 

I am using the DMA FIFO to playout a pattern on a FlexRIO board.  The patterns will vary in length.  My FIFO depth is 4095

 

The host will load a patterns of different lengths (<4095).  The last word of the pattern will have a stop bit so that the target will know not to read out more data.   Then the Host will load the next pattern.

 

The question: Does the DMA FIFO act as a traditional FIFO on the target side or are there always 4096 word locations I need to deal with.   If the host loads 10 words is it only loading 10 words or is it loading the full 4096 words?   If it is the full 4096 would the target side need to do a FLUSH between each playback or does the Host handle that?

 

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