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Altera_Forum's avatar
Altera_Forum
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16 years ago

How to finish the altpciechdma.c driver?

I've downloaded the altpciechdma.c driver for the Altera Arria GX dev kit. The char part of it is not yet finished (due to the comments). And a module is missign "mapper_user_to_sg.h". Smb has...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Hi,

Thank you for reply.

I find the driver's write operation is use anther way to do the DMA map,and i can't verify if that map way have more efficiency.

The driver author Leon also replied:

We found that we could not make user SGDMA work reliably with the IP

provided by Altera.

Direct I/O user scatter-gather DMA was introduced in a commercial PCI

Express IP core for Altera FPGA's:

http://www.lancero.eu.com/lancero-pcie-sgdma/