Re: Alpha: virt_to_bus/GFP_DMA problem

Jes Sorensen (Jes.Sorensen@cern.ch)
10 Dec 1999 21:22:15 +0100


>>>>> "Richard" == Richard Henderson <rth@cygnus.com> writes:

Richard> On Fri, Dec 10, 1999 at 06:19:37PM +0100, Jes Sorensen wrote:
>> The devices I am playing with already support 64 bit address
>> cycles, even on 32 bit busses ;-) Like the Alteon AceNIC Gigabit
>> card and the Essential RoadRunner HIPPI card.

Richard> Yeah, but DAC takes two cycles on the address bus instead of
Richard> one. If we use SG, we can avoid that.

Or run the device native in 64 bit mode ;-) (for the AceNIC at least).

Jes

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