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Supporting multiple outstanding DMA requests #26

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shtaxxx opened this issue Apr 16, 2019 · 1 comment
Open

Supporting multiple outstanding DMA requests #26

shtaxxx opened this issue Apr 16, 2019 · 1 comment

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@shtaxxx
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shtaxxx commented Apr 16, 2019

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@shtaxxx shtaxxx changed the title Multiple outstanding DMA request Supporting multiple outstanding DMA requests Apr 16, 2019
@shtaxxx
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shtaxxx commented Apr 16, 2019

Two DMAs in the following thread code should be overlapped.

def ctrl():
    myaxi.dma_read_async(local_ram, laddr0, gaddr0, size0)
    myaxi.dma_read_async(local_ram, laddr1, gaddr1, size1)
    myaxi.dma_wait()

To support multiple outstanding requests, unissued request queue and issued request queue will be required respectively.
The similar mechanism had been implemented in PyCoRAM.

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