[Linux-ia64] 64 bit PCI DMA transfers?

From: Nelson Escobar <nelson_at_myri.com>
Date: 2000-09-07 06:29:19
Hi,

Do 64 bit PCI DMA transfers work in the test7 kernel yet?

Doing 64 bit PCI DMA transfers to memory less than 2 gigs works
fine.  When I use 4 gigs of memory, the physical address of the last 2
gigs seems to be 0x100000000 - 0x17fffffff.  When I try doing PCI DMA
transfers into this area, everything starts going wrong.

Is this a problem with the kernel?  Or is it a problem with my driver? or
both?

Nelson Escobar
nelson@myri.com
Received on Wed Sep 06 12:29:27 2000

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