Re: DMA mode locked off when via82cxxx ide driver built as module in 2.6.14

From: Vojtech Pavlik
Date: Sat Nov 19 2005 - 14:52:36 EST

On Sat, Nov 19, 2005 at 07:23:43PM +0000, Larry.Finger@xxxxxxxxxxxx wrote:
> -------------- Original message ----------------------
> From: Vojtech Pavlik <vojtech@xxxxxxx>
> > On Sat, Nov 19, 2005 at 06:59:37PM +0000, Larry.Finger@xxxxxxxxxxxx wrote:
> > > My HP ze1115 notebook uses the via82cxxx ide driver. If I configure the kernel
> > build to make that driver as a module, the driver is correctly added to initrd
> > and is loaded at boot time; however, DMA mode is turned off. It cannot be turned
> > on even if I use an 'hdparm -d1 /dev/hda' command.
> > >
> > > Is this a bug, or do I need some kind of IDE=XXX boot command? As expected,
> > system performance in this mode is horrible.
> >
> > What chipset does your notebook use? 'lspci -vv' should give a good
> > answer.
> Portion of output of lspci -vv:
> 00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
> Subsystem: Hewlett-Packard Company: Unknown device 0022
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 64
> Region 4: I/O ports at 1100 [size=16]
> Capabilities: [c0] Power Management version 2
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
> Status: D0 PME-Enable- DSel=0 DScale=0 PME-

I need the portion for the ISA bridge, surprisingly, to know.

Vojtech Pavlik
SuSE Labs, SuSE CR
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