Need new modutils aliases for 2.4.0? (Was) Re: Cannot hotplug cardbus cards.

Need new modutils aliases for 2.4.0? (Was) Re: Cannot hotplug cardbus cards.

[Miles Lane]

Andrew Morton wrote:

> Miles Lane wrote:
> 
>> ...
>> Jan 22 12:55:30 agate cardmgr[444]: module
>> /lib/modules/2.4.1-pre9/pcmcia/3c575_cb.o not available
> 
> 
> The hotplug command is doing the right thing - it's
> trying to load 3c575_cb.o.  But you're using 3c59x.o
> under 2.4.
> 
> I think you need an `alias eth0 3c59x' in modules.conf.

I'll try that.  Is this something that modutils should
be doing?  I kinda think it is.  Basically, we'd need
aliasing of any pcmcia-cs drivers whose function is now
served by a new driver in the 2.4.0 kernel tree.
BTW:  I would *really* like to see someone championing
creating a smooth transition path for pcmcia-cs users.
This means getting all the usermode stuff in place for
removing drivers (thanks, David) and also building a
way to prepare a PCMCIA/Cardbus card for removal.

I guess the tough part, here, is the PCMCIA support.
Which, I gather, isn't really there in the 2.4.0
kernel code, yet.  Is that correct?

Thanks,
	Miles


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Re: Need new modutils aliases for 2.4.0? (Was) Re: Cannot hotplug cardbus cards.

[Miles Lane]

Miles Lane wrote:

> Andrew Morton wrote:
> 
>> Miles Lane wrote:
>> 
>>> Jan 22 12:55:30 agate cardmgr[444]: module
>>> /lib/modules/2.4.1-pre9/pcmcia/3c575_cb.o not available
>> 
>> The hotplug command is doing the right thing - it's
>> trying to load 3c575_cb.o.  But you're using 3c59x.o
>> under 2.4.
>> 
>> I think you need an `alias eth0 3c59x' in modules.conf.
> 
> 
> I'll try that.  Is this something that modutils should
> be doing?  I kinda think it is.  Basically, we'd need
> aliasing of any pcmcia-cs drivers whose function is now
> served by a new driver in the 2.4.0 kernel tree.
> BTW:  I would *really* like to see someone championing
> creating a smooth transition path for pcmcia-cs users.
> This means getting all the usermode stuff in place for
> removing drivers (thanks, David) and also building a
> way to prepare a PCMCIA/Cardbus card for removal.
> 
> I guess the tough part, here, is the PCMCIA support.
> Which, I gather, isn't really there in the 2.4.0
> kernel code, yet.  Is that correct?

On further exploration:

Adding "alias eth0 3c59x" or "alias /dev/eth0 3c59x"
or "alias 3c575_cb 3c59x" and then running "depmod -ae"
before inserting the 3c575 card did not help.

Also, I am questioning whether /sbin/hotplug uses
cardmgr to get the modules loaded.  That means that
the messages I sent earlier:

Jan 22 16:43:26 agate /sbin/hotplug: arguments (pci) env 
(PCI_CLASS 000 PCI_ID\x10B7:5157 ACTION­d TERM=dumb HOSTTYPE=i386 
PATH=/bin:/sbin:/usr/sbin:/usr/bin HOME=/ SHELL=/bin/bash DEBUG=yes 
PCI_SUBSYS_ID\x10B7:5B57 OSTYPE=Linux PCI_SLOT_NAME\x01:00.0 SHLVL=1 
_=/usr/bin/env)
Jan 22 16:43:26 agate cardmgr[444]: module 
/lib/modules/2.4.1-pre9/pcmcia/cb_enabler.o not available
Jan 22 16:43:26 agate cardmgr[444]: module 
/lib/modules/2.4.1-pre9/pcmcia/3c575_cb.o not available

may simply show that Card Services is trying to handle the
driver loading, not /sbin/hotplug.

I will have to check and see whether David Brownell is
correct and I am missing the recent hotplug patch sent
by Dan Zink.

Anyhow, if /sbin/hotplug is going to handle the driver
loading using modprobe, than we will probably need a
way to get cardmgr out of the picture.

	Miles


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Re: Need new modutils aliases for 2.4.0? (Was) Re: Cannot hotplug cardbus cards.

[Bill Nottingham]

Miles Lane (miles@megapathdsl.net) said: 
> > The hotplug command is doing the right thing - it's
> > trying to load 3c575_cb.o.  But you're using 3c59x.o
> > under 2.4.
> > 
> > I think you need an `alias eth0 3c59x' in modules.conf.
> 
> I'll try that.  Is this something that modutils should
> be doing?  I kinda think it is.  Basically, we'd need
> aliasing of any pcmcia-cs drivers whose function is now
> served by a new driver in the 2.4.0 kernel tree.

I don't think it's something that should be solved in modutils;
there's no reason it needs to know in modutils itself about
what modules do what with what kernel version; alias.h is
big enough as is. ;)

I would think that if you had working modules.<foo>map support,
it shouldn't be a problem.

Bill


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Re: Need new modutils aliases for 2.4.0? (Was) Re: Cannot hotplug cardbus cards.

[David Hinds]

On Mon, Jan 22, 2001 at 04:52:22PM -0800, Miles Lane wrote:
> 
> Adding "alias eth0 3c59x" or "alias /dev/eth0 3c59x"
> or "alias 3c575_cb 3c59x" and then running "depmod -ae"
> before inserting the 3c575 card did not help.

The hotplug script should not need this alias.  That's the whole point
of having the PCI ID matching stuff, right?  (the driver gets loaded
based on the device ID, not based on a user request for eth0)

> Also, I am questioning whether /sbin/hotplug uses
> cardmgr to get the modules loaded.  That means that
> the messages I sent earlier:

/sbin/hotplug and cardmgr do not interact.  cardmgr decided to try
loading 3c575_cb based on /etc/pcmcia/config; no hotplug event was
involved.

-- Dave

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Re: Need new modutils aliases for 2.4.0? (Was)

[David Brownell]

> From: David Hinds <dhinds@sonic.net>
> Sent: Thursday, January 25, 2001 8:54 PM
> 
> Actually I think all the evidence suggests that at this point the
> unbundled pcmcia drivers still get considerably more attention than
> the kernel drivers, at least at the end user level.

You're likely right about that, but I guess I thought that was
something that folk wanted to change.  Maybe not all at once ...
and focussing on Cardbus at first.


> > I would like to explore the "mutual-noninterference pact" 
> > between Cardmgr and /sbin/hotplug.  It seems important to
> > get right.  Obviously, David Hinds will play a big role
> > in this.
> 
> I have added code to cardmgr to parse modules.pcimap to figure out
> which cards should be handled by the hotplug stuff.  I still have a
> few things to clean up but I don't think it will be hard.

That sounds good.  Can that also understand the network hotplugging?
Or is that going to need work yet?

- Dave




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