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VDMA & PCI
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: VDMA & PCI
- From: Chris Malcheski <71232.360@CompuServe.COM>
- Date: 12 Aug 96 20:36:42 EDT
- Resent-Date: 12 Aug 96 20:36:42 EDT
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"yEq1e1.0.4Q5.Uwy3o"@dart>
- Resent-Sender: pci-sig-request@znyx.com
Hi All,
Here's one I'll be NOBODY can answer, but I'll give it a shot ...
what happens to VDMA (virtual DMA) services on a bus mastering transfer? My
understanding was that the VDMA internals intercepted I/O to the DMA controller
and converted logical addresses to physical. On PCI bus mastering, there is no
effective I/O to trap to the DMA controller. I would imagine this would render
VDMA useless in these cases.
Anybody have any insight?
-- Chris
D 3