Re: [patch] My AMD IDE driver, v2.7

Martin Dalecki
2002-03-12T16:27:56Z

Vojtech Pavlik wrote:

> Well, as much as I'd like to use safe pre-computed register values for
> the chips, that ain't possible - even when we assumed the system bus
> (PCI, VLB, whatever) was always 33 MHz, still the drives have various
> ideas about what DMA and PIO modes should look like, see the tDMA and
> tPIO entries in hdparm -t.

Yes yes yes of course some of the drivers are confused. And I don't
argue that precomputation is adequate right now. It just wasn't for
the CMD640 those times... I only wanted to reffer to history and
why my timings where different then the computed.

> So, arithmetics has to stay. Hopefully just one instance in
> ide-timing.c.
>
>
>>>I plan to focus on the most important drivers first, to fix and clean
>>>them, working with the authors where possible.
>>>
>>PIIX na VIA comes to mind first ;-)...
>>
>
> VIA is already OK, well, it has my name in it. :) AMD is now also (well,

Oh of course I was reffering to VIA as important.

> that one wasn't broken, just ugly), SiS is being revamped by Lionel
> Bouton (whom I'm trying to help as much as I can), so yes, PIIX would be
> next.

I swallowed his SiS stuff already, since my home main machine is
a SiS735 based board. (Awfoul cheap that thing and quite good price/performance
ratio ;-).

> PIIX and ICH are pretty crazy hardware from the design perspective, very
> legacy-bound back to the first Intel PIIX chip. And the driver for these

Yes I "love" the bound together DMA areas as well ;-).

> in the kernel has similarly evolved following the hardware. However, it
> doesn't seem to be wrong at the first glance. Nevertheless, I'll take a
> look at it. Unfortunately, I don't have any Intel hardware at hand to
> test it with.

Just another hint: dmaproc is silly nomenclature is should be
dma_strategy <- this would better reflect it's purpose.