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My design is using PCIe Hard IP core with AVMM-DMA interface, but the DMA descriptor length is limited lower than 128, I want to use 256 or larger than 256, how should I do?
Modular scatter-gather dma(in platform designer IP catalog) could select larger descriptor length, how to integrate SG-DMA into the PCIe Hard IP core with AVMM interface to resolve this problem, does I need open NIOS II to use the SG-DMA?
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Hi,
Yes, the descriptor controller supports up to 128 descriptors, and this is unable to change to a larger number. Regarding to the modular SG-DMA, this is not necessary to use NIOS to configure. You can use any of the AVMM interfaces to configure the modular SG-DMA, for example, PCIe BAR.
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Hi,
Yes, the descriptor controller supports up to 128 descriptors, and this is unable to change to a larger number. Regarding to the modular SG-DMA, this is not necessary to use NIOS to configure. You can use any of the AVMM interfaces to configure the modular SG-DMA, for example, PCIe BAR.
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Thanks SengKok.
Does there have the example design for PCIe hard core with AVMM interface using external DMA? if yes, I could replace the normal DMA to SGDMA for the fast testing.
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I have checked with the team, unfortunately, there is no such example available. Thanks.
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