I have created an md raid6 device and added crypto.
I have also enabled the ioat driver. (ioatdma)
The flow seems to be md/raid5:async_xor_offs() -> crypto/async_tx/async_xor.c:async_xor_off()
Here it attempts to obtain a dma_chan and dma device, but they are always NULL.
Some added debug messages.
async_xor_offs: async_xor - Starting called async_tx_find_channel chan=0000000000000000 device=0000000000000000
So, can the md driver utilize a DMA engine? I believe the answer is yes, but I am missing some setup steps?
I can get the dmatest driver to interface successfully.
I may not know enough about how this works to ask proper questions...
Thanks,
Don Brace
