[parisc-linux] eisa nic: intel 82556. Driver?

[parisc-linux] eisa nic: intel 82556. Driver?

[Diego Francisco de Gastal Morales]

Hello,

	I just installed linux on a HP9000/D280. It's all fine, except the =
machine has two eisa fast ethernet cards, with intel 82556 chipset, and =
I can't make it work.
	I've already searched a lot the internet, this list archives, =
recompiled my kernel with various modules, and I am just about to loose =
my faith. I've found a message just like "with this chipset on eisa, =
you're out of luck".

	Is it really so? Does anyone here heard of this nic working on linux =
parisc? Without fast ethernet, I'm afraid we'll have to give up putting =
linux on it.


	Thank you in advance.


--
Diego Francisco de Gastal Morales

Equipe de Rede
Depto. de Inform=E1tica
Tribunal de Justi=E7a do RS
Porto Alegre/RS - Brasil

Re: [parisc-linux] eisa nic: intel 82556. Driver?

[Chris Jantzen]

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On Mon, Jul 28, 2003 at 04:55:25PM -0300, Diego Francisco de Gastal Morales wrote:
> Hello,
> 
> 	I just installed linux on a HP9000/D280. It's all fine, except the machine has two eisa fast ethernet cards, with intel 82556 chipset, and I can't make it work.
> 	I've already searched a lot the internet, this list archives, recompiled my kernel with various modules, and I am just about to loose my faith. I've found a message just like "with this chipset on eisa, you're out of luck".
> 
> 	Is it really so? Does anyone here heard of this nic working on linux parisc? Without fast ethernet, I'm afraid we'll have to give up putting linux on it.


I gave up on installing some EISA 3com cards in my C180. I believe the
dmac bridge in Linux isn't (yet) general enough to support anything
other than PCI.

That said, is Fast Ethernet really *that* important? You'd have to be
using the host to do fairly trivial tasks thousands of times per second
to saturate 100Mbps. In other words: at these CPU speeds, anything
seriously taxing will obviate your need for that much bandwidth. I do
builds over NFS and notice no appreciable performance hits. (And
certainly bandwidth monitors are never pegged on the network.)

-- 
chris jantzen kb7rnl =->         __O
Insert witty comment here.     _`\<,_
http://www.maybe.net/         (*)/ (*)

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Re: [parisc-linux] eisa nic: intel 82556. Driver?

[Grant Grundler]

On Mon, Jul 28, 2003 at 04:55:25PM -0300, Diego Francisco de Gastal Morales wrote:
> 	I just installed linux on a HP9000/D280. It's all fine,
> except the machine has two eisa fast ethernet cards, with intel 82556
> chipset, and I can't make it work.

No EISA cards which require DMA will work (yet).
Wax (EISA bus controller) docs haven't been published and a non-coherent
IOMMU (have I got that right, James?) needs to be programmed for DMA.

It's likely someone from inside HP will have to write that code
since it's gotten alot harder to publish stuff.

grant

Re: [parisc-linux] eisa nic: intel 82556. Driver?

[James Bottomley]

On Tue, 2003-07-29 at 17:32, Grant Grundler wrote:
> No EISA cards which require DMA will work (yet).

Actually, I believe at least the aha1740 will.  The problem is that very
few have been properly converted to using the API.  A lot have been
converted to use the EISA bus abstraction, but there's no incentive to
take them further.

Fortunately, since EISA cards were mainly designed to work in PIO mode
in I/O space, there are quite a few that will work if they've only been
converted to the new probing API.

> Wax (EISA bus controller) docs haven't been published and a non-coherent
> IOMMU (have I got that right, James?) needs to be programmed for DMA.

I'm not really sure what the wax IOMMU does.  I suspect its main use is
to help ISA like cards, but I don't know for sure. It currently looks
like Wax/Mongoose are simply bypassed, and the DMA goes straight through
the U2/Uturn.

James