few questions about linux on sgi machines

few questions about linux on sgi machines

[Alex Deucher]

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Is the PCI slot supported on the o2 (i.e., could I put a linux
supported pci card in and use it)?  Also is the o2 AV IO board
supported?  Is that encompassed by VICE or is that separate?

What about the PCI slots on o200?  Are they supported?

Also, out of curiosity, is there a list somewhere of all the asics in
the Octane?  e.g., sound chip(s), ethernet, parallel/serial, etc.

Thanks,

Alex


	
		
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Re: few questions about linux on sgi machines

[Stanislaw Skowronek]

> Also, out of curiosity, is there a list somewhere of all the asics in
> the Octane?  e.g., sound chip(s), ethernet, parallel/serial, etc.

Yes! (It depends what do you call an ASIC. I use it for a SGI-specific
chip with no docs at all.)

-- Base I/O --
HEART	memory controller, Xtalk bridge
IOC3	multi-I/O
RAD1	audio
BRIDGE	Xtalk-PCI bridge?
-- Frontplane --
XBOW	Xtalk router
-- PCI card cage (correct this) --
BRIDGE	Xtalk-PCI bridge
-- MardiGras (this is one big mystery) --
HQ4	Xtalk bridge
GE11	geometry engine
RE4	raster engine
PP1	?
VC3	video controller?
CMAP	colormap?

I'm writing this from memory, so correct me please.

Stanislaw Skowronek

Re: few questions about linux on sgi machines

[Christoph Hellwig]

On Thu, Apr 22, 2004 at 08:28:46PM +0200, Stanislaw Skowronek wrote:
> > Also, out of curiosity, is there a list somewhere of all the asics in
> > the Octane?  e.g., sound chip(s), ethernet, parallel/serial, etc.
> 
> Yes! (It depends what do you call an ASIC. I use it for a SGI-specific
> chip with no docs at all.)
> 
> -- Base I/O --
> BRIDGE	Xtalk-PCI bridge?

Yes.  The same as used in the IP27 btw.

> -- Frontplane --
> XBOW	Xtalk router

Also shared witg IP27.

Re: few questions about linux on sgi machines

[Christoph Hellwig]

On Thu, Apr 22, 2004 at 10:49:16AM -0700, Alex Deucher wrote:
> What about the PCI slots on o200?  Are they supported?

There's is PCI support but there's some problems, mosty because the
Linux support code isn't as nice as it should and we support only
glogic fibre channels and scsi cards and the SGI ioc3 currently.

Fixing that is in-progress but even then you could have problems with
most standard linux drivers because the pci hardware on all systems
using the bridge ASIC and it's sucessors (xbridge, pic) violate some
ordering contraints in the PCI spec.  The SGI folks doing the SN1/SN2
IA64 port have come up with workaround for xbride and pic but I'm not
sure they're applicable to IP27.

Re: few questions about linux on sgi machines

[Alex Deucher]

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--- Christoph Hellwig <hch@lst.de> wrote:
> On Thu, Apr 22, 2004 at 10:49:16AM -0700, Alex Deucher wrote:
> > What about the PCI slots on o200?  Are they supported?
> 
> There's is PCI support but there's some problems, mosty because the
> Linux support code isn't as nice as it should and we support only
> glogic fibre channels and scsi cards and the SGI ioc3 currently.
> 
> Fixing that is in-progress but even then you could have problems with
> most standard linux drivers because the pci hardware on all systems
> using the bridge ASIC and it's sucessors (xbridge, pic) violate some
> ordering contraints in the PCI spec.  The SGI folks doing the SN1/SN2
> IA64 port have come up with workaround for xbride and pic but I'm not
> sure they're applicable to IP27.

I assume IP30 has the same problems since they are similarly
architected?  What about IP32?

Thanks,

Alex



	
		
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Re: few questions about linux on sgi machines

[Christoph Hellwig]

On Fri, Apr 23, 2004 at 06:29:01AM -0700, Alex Deucher wrote:
> I assume IP30 has the same problems since they are similarly
> architected?

I guess it has the same problems as it's using the bridge ASIC, too.

> What about IP32?

It uses a completely different pci subsystem that should be okay.

Re: few questions about linux on sgi machines

[Alex Deucher]

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--- Ladislav Michl <ladis@linux-mips.org> wrote:
> On Thu, Apr 22, 2004 at 10:49:16AM -0700, Alex Deucher wrote:
> > Is the PCI slot supported on the o2 (i.e., could I put a linux
> > supported pci card in and use it)?  Also is the o2 AV IO board
> > supported?  Is that encompassed by VICE or is that separate?
> 
> PCI is supported with some limitations. MMIO doesn't work for certain
> endianess combinations, but PIO should be okay.
> 
> O2's AV IO is part of VICE. Vivien Chappelier wrote original ALSA
> driver
> and I did some work on it later, but stopped due to some buzz world
> stuff (am I shy to show unfinished code ;-)). You may find Vivien's
> patches here: http://www.linux-mips.org/~glaurung/
> Video input is currently unsupported (no video4linux driver)

Are there databooks floating around for the AV stuff or does it have to
be reverse engineered?  Does it use standard chips or is it custom sgi
stuff?

Thanks,

Alex

> 
> 	ladis



	
		
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Re: few questions about linux on sgi machines

[Ralf Baechle]

On Fri, Apr 23, 2004 at 03:31:06PM +0200, Christoph Hellwig wrote:

> On Fri, Apr 23, 2004 at 06:29:01AM -0700, Alex Deucher wrote:
> > I assume IP30 has the same problems since they are similarly
> > architected?
> 
> I guess it has the same problems as it's using the bridge ASIC, too.
> 
> > What about IP32?
> 
> It uses a completely different pci subsystem that should be okay.

It's not fully PCI compliant either ...

  Ralf