Re: [patch] PIIX driver rewrite

[Vojtech Pavlik]

On Tue, Mar 12, 2002 at 09:35:05PM +0100, Sebastian Droege wrote:
> On Tue, 12 Mar 2002 21:00:35 +0100
> Vojtech Pavlik <[e-mail]> wrote:
> 
> > On Tue, Mar 12, 2002 at 12:00:24PM +0100, Martin Dalecki wrote:
> > > Hello Vojtech.
> > > 
> > > I have noticed that the ide-timings.h and ide_modules.h are running
> > > much in aprallel in the purpose they serve. Are the any
> > > chances you could dare to care about propagating the
> > > fairly nice ide-timings.h stuff in favour of
> > > ide_modules.h more.
> > > 
> > > BTW.> I think some stuff from ide-timings.h just belongs
> > > as generic functions intro ide.c, and right now there is
> > > nobody who you need to work from behind ;-).
> > > 
> > > So please feel free to do the changes you apparently desired
> > > to do a long time ago...
> > 
> > Oh, by the way, here goes the PIIX rewrite ... unlike the AMD one, this
> > is completely untested, and may not work at all - I only have the
> > datasheets at hand, no PIIX hardware.
> > 
> > Differences from the previous PIIX driver:
> > 
> > * 82451NX MIOC isn't supported anymore. It's not an ATA controller, anyway ;)
> > * 82371FB_0 PIIX ISA bridge isn't an ATA controller either.
> > * 82801CA ICH3 support added. Only ICH3-M is supported by the original driver.
> > * 82371MX MPIIX is not supported anymore. Too weird beast and doesn't do
> >   DMA anyway, better handled by the generic PCI ATA routines.
> > 
> > * Cleaner, converted to ide-timing.[ch]
> > 
> > * May not work. ;)
> But does work with an Intel Corp. 82371AB PIIX4 IDE (rev 01) IDE controller...

Thanks a lot for the testing!

> I'll do some more stress testing but it boots, works in DMA and the data transfer rates haven't decreased ;)
> *playingwithhdparmanddbench* ;)

If you can (in addition to the benchmark numbers) also send me the
output of 'cat /proc/ide/piix' and 'dmesg' and 'lspci -vvxxx'both my and
the original version ... that'd help a lot too.

Thanks again,
-- 
Vojtech Pavlik
SuSE Labs