[PATCH][RFC] mac-io IDE support

[Laurent Vivier]

Hi,

this patch adds the mac-io IDE support to openBIOS. It works well with  
openBIOS (to load kernel) and with kernel 2.4 but has some problems  
with linux 2.6.

For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4  
works well (but not kernel 2.6), but using debian-40r6-powerpc- 
netinst.iso fails when debian-installer loads all udeb components.

Is there a bug in qemu, linux or the mac-io IDE device tree is not  
initialized correctly ?

Regards,
Laurent

[Aurelien Jarno]

On Fri, Jan 16, 2009 at 06:27:16PM +0100, Laurent Vivier wrote:
> Hi,
>
> this patch adds the mac-io IDE support to openBIOS. It works well with  
> openBIOS (to load kernel) and with kernel 2.4 but has some problems with 
> linux 2.6.
>
> For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4  
> works well (but not kernel 2.6), but using debian-40r6-powerpc- 
> netinst.iso fails when debian-installer loads all udeb components.
>
> Is there a bug in qemu, linux or the mac-io IDE device tree is not  
> initialized correctly ?

I have tried your patch on already installed disk image, and it works
without problem. I tried Debian etch (kernel 2.6.18), etchnhalf (kernel
2.6.24) and lenny (kernel 2.6.26).

I haven't done any change on the qemu side. Given that the mac-io ide is
detected before the CMD646, I have to pass -hdc to the disk image so
that it is recognized as -hda by Linux. I'll do test with the different
install CD tomorrow.

Aurelien

[Laurent Vivier]

Le 18 janv. 09 à 00:37, Aurelien Jarno a écrit :
> On Fri, Jan 16, 2009 at 06:27:16PM +0100, Laurent Vivier wrote:
> > Hi,
> >
> > this patch adds the mac-io IDE support to openBIOS. It works well  
> > with
> > openBIOS (to load kernel) and with kernel 2.4 but has some problems  
> > with
> > linux 2.6.
> >
> > For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4
> > works well (but not kernel 2.6), but using debian-40r6-powerpc-
> > netinst.iso fails when debian-installer loads all udeb components.
> >
> > Is there a bug in qemu, linux or the mac-io IDE device tree is not
> > initialized correctly ?
>
> I have tried your patch on already installed disk image, and it works
> without problem. I tried Debian etch (kernel 2.6.18), etchnhalf  
> (kernel
> 2.6.24) and lenny (kernel 2.6.26).

Thank you to have tested this.
> I haven't done any change on the qemu side. Given that the mac-io  
> ide is
> detected before the CMD646, I have to pass -hdc to the disk image so
> that it is recognized as -hda by Linux. I'll do test with the  
> different
> install CD tomorrow.

I use "-drive file=new_disk.qcow2,bus=1,unit=0 -drive file=debian-40r6- 
netinst.iso,bus=1,unit=1,media=cdrom"

and boot with "boot ide2:"

Try to install debian on the disk using these parameters. It fails  
every time for me when debian-installer loads its udeb.

Regards,
Laurent
-------------------- [e-mail] --------------------
"Tout ce qui est impossible reste à accomplir"    Jules Verne
"Things are only impossible until they're not" Jean-Luc Picard

[Aurelien Jarno]

On Sun, Jan 18, 2009 at 01:42:21AM +0100, Laurent Vivier wrote:
> Le 18 janv. 09 à 00:37, Aurelien Jarno a écrit :
> > On Fri, Jan 16, 2009 at 06:27:16PM +0100, Laurent Vivier wrote:
> > > Hi,
> > >
> > > this patch adds the mac-io IDE support to openBIOS. It works well  
> > > with
> > > openBIOS (to load kernel) and with kernel 2.4 but has some problems  
> > > with
> > > linux 2.6.
> > >
> > > For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4
> > > works well (but not kernel 2.6), but using debian-40r6-powerpc-
> > > netinst.iso fails when debian-installer loads all udeb components.
> > >
> > > Is there a bug in qemu, linux or the mac-io IDE device tree is not
> > > initialized correctly ?
> >
> > I have tried your patch on already installed disk image, and it works
> > without problem. I tried Debian etch (kernel 2.6.18), etchnhalf  
> > (kernel
> > 2.6.24) and lenny (kernel 2.6.26).
>
> Thank you to have tested this.
> > I haven't done any change on the qemu side. Given that the mac-io ide 
> > is
> > detected before the CMD646, I have to pass -hdc to the disk image so
> > that it is recognized as -hda by Linux. I'll do test with the  
> > different
> > install CD tomorrow.
>
> I use "-drive file=new_disk.qcow2,bus=1,unit=0 -drive file=debian-40r6- 
> netinst.iso,bus=1,unit=1,media=cdrom"
>
> and boot with "boot ide2:"
>
> Try to install debian on the disk using these parameters. It fails every 
> time for me when debian-installer loads its udeb.

I am able to reproduce the problem here when installing from the CD-ROM.
debian-installer says: "bad md5sum".

If I use the netboot install (kernel + initrd), debian-installer is
working perfectly, so the problem seems related to the CD-ROM only.

[Aurelien Jarno]

On Sun, Jan 18, 2009 at 06:21:37PM +0100, Aurelien Jarno wrote:
> On Sun, Jan 18, 2009 at 01:42:21AM +0100, Laurent Vivier wrote:
> > Le 18 janv. 09 à 00:37, Aurelien Jarno a écrit :
> > > On Fri, Jan 16, 2009 at 06:27:16PM +0100, Laurent Vivier wrote:
> > > > Hi,
> > > >
> > > > this patch adds the mac-io IDE support to openBIOS. It works well  
> > > > with
> > > > openBIOS (to load kernel) and with kernel 2.4 but has some problems  
> > > > with
> > > > linux 2.6.
> > > >
> > > > For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4
> > > > works well (but not kernel 2.6), but using debian-40r6-powerpc-
> > > > netinst.iso fails when debian-installer loads all udeb components.
> > > >
> > > > Is there a bug in qemu, linux or the mac-io IDE device tree is not
> > > > initialized correctly ?
> > >
> > > I have tried your patch on already installed disk image, and it works
> > > without problem. I tried Debian etch (kernel 2.6.18), etchnhalf  
> > > (kernel
> > > 2.6.24) and lenny (kernel 2.6.26).
> >
> > Thank you to have tested this.
> > > I haven't done any change on the qemu side. Given that the mac-io ide 
> > > is
> > > detected before the CMD646, I have to pass -hdc to the disk image so
> > > that it is recognized as -hda by Linux. I'll do test with the  
> > > different
> > > install CD tomorrow.
> >
> > I use "-drive file=new_disk.qcow2,bus=1,unit=0 -drive file=debian-40r6- 
> > netinst.iso,bus=1,unit=1,media=cdrom"
> >
> > and boot with "boot ide2:"
> >
> > Try to install debian on the disk using these parameters. It fails every 
> > time for me when debian-installer loads its udeb.
>
> I am able to reproduce the problem here when installing from the CD-ROM.
> debian-installer says: "bad md5sum".
>
> If I use the netboot install (kernel + initrd), debian-installer is
> working perfectly, so the problem seems related to the CD-ROM only.

Looking more closely, it looks like the DMA ports are not mapped (both
in QEMU and in OpenBIOS), which disables DMA:

[    3.663184] ide0 at 0xca078000-0xca078070,0xca078160 on irq 19
[    2.687286] ide0: DMA disabled

It is not impossible that the ATAPI emulation is buggy in non DMA mode.
I am looking at what to do on the QEMU side to enable DMA.