Skylake DMA config question - move and generate CRC-32

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Skylake DMA config question - move and generate CRC-32

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Hi,

per Purely QuickData programming guide (Document Number: 561480, Revision: 1.0) the Skylake DMA can support several operation types: standard DMA operation, block fill, DMA with DIF insert, Move & Generate CRC-32 and many more.

current Linux driver support only the standard DMA operation. see https://github.com/intel/mOS/tree/master/drivers/dma/ioat

has anyone configured/used the DMA to do any DMA move plus CRC generation?. this looks like a cool way to save cycles on CRC calculation, by offloading it to the DMA engine.

thanks.

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