Date: Mon, 5 Jul 2004 09:25:01 +0200 From: Michael Kukat <michael@unixiron.org> To: freebsd-alpha@freebsd.org Subject: Solved: sf(4) on PC164 works. Next question: DMA burst sizes Message-ID: <200407050925.03251.michael@unixiron.org>
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Hello, after hacking around the weekend with this sf(4) driver, i finally got it working fine in the PC164. One of the reasons was my PR kern/68623, the other reason is the PC164 needing the driver to use DMA burst sizes > 0 (i think size 0 means no burst). So, after implementing the code lines to set this DMA burst, i would like to optimize performance here. AFAIK, the optimal DMA burst size depends on the capabilities of the PCI-Host brige. If this is true, does someone have information about the different chipsets used on Alpha systems? Currently, i'm especially interested in Alcor and Apecs chipsets, as i have platforms using those chips here to test it. I'll release the final driver patches as soon as i have tested everything on i386 and maybe sparc64 also to avoid platform incompatibilities. ...Michael
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