[Soekris] Linux on net4801 => HDD DMA

[Chris Boot]

Hi there,

I know DMA doesn't work with flash cards, but this is for a hard drive, 
where it should work and the lines are present...

It seems as though I need to make a choice between 2.4.x with broken 
DMA and a watchdog, or 2.6.x with working DMA but no watchdog... Hmm 
:-/

Chris

On 21 Oct 2004, at 16:30, Jim Cromie wrote:

> Chris Boot wrote:
>
>> Hi all,
>>
>> I've been trying to enable DMA on my net4801 with a 2.5" HD 
>> installed. I keep getting strange errors and I can never tell if DMA 
>> is enabled or not, since I get two different results from 2 different 
>> places... I'm running vanilla 2.4.27 plus the patches from 
>> http://centerclick.org/net4801/. I've enabled the SC1x00 ATA driver.
>
>
> Chris,
>
> read all of thread, from 10/20, it explains why DMA might be 
> ill-defined..
>
> Re: [Soekris] 4801 CF, NetBSD-current
>
>
> You might try kernel boot params to turn off dma.
> see Documentation/{ide.txt,kernel-parameters.txt}
>
> "idex=reset"           : reset interface after probe
> "idex=dma"             : automatically configure/use DMA if possible.
> "idex=ata66"           : informs the interface that it has an 80c cable
>                          for chipsets that are ATA-66 capable, but the
>                          ability to bit test for detection is currently
>                          unknown.
>
> IIUC (I may not), "idex=nodma" should work for you.
> These should be honored by the SC1200 driver.
>
-- 
Chris Boot
bootc at bootc.net
http://www.bootc.net/

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