Hot swap support in linux?

Hot swap support in linux?

[Raghavendra Koushik]

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Does the current linux kernel support hot swap feature for network interface
cards(NICs). I would be glad if any of you can provide me some pointers or
documentation regards the same...

Regards
Koushik







 



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Re: Hot swap support in linux?

[Alan Cox]

> Does the current linux kernel support hot swap feature for network interface
> cards(NICs). I would be glad if any of you can provide me some pointers or
> documentation regards the same...

If your hardware supports it - yes. You'll need something like the compaq
hotswap pci backplanes or of course simply use cardbus

RE: Hot swap support in linux?

[Raghavendra Koushik]

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few more questions pertaining to hot swap..
1. 	how exactly do I build my linux kernel with hotswap support. When I do
	'make xconfig' (for linux 2.4.4 kernel) I don't see a hotplug option.

2.	If I write my driver according to the new way of writing PCI drivers for
    	ethernet cards i.e using MODULE_DEVICE_TABLE et al, is it enough to
make
	my driver hot pluggable.

3.	Does the NIC need to provide any particular h/w support to make it
	hotpluggable.


Thanks in advance
Koushik


 



-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Alan Cox
Sent: Tuesday, January 01, 2002 3:44 PM
To: Raghavendra Koushik
Cc: linux-kernel@vger.kernel.org
Subject: Re: Hot swap support in linux?


> Does the current linux kernel support hot swap feature for
network interface
> cards(NICs). I would be glad if any of you can provide me some pointers or
> documentation regards the same...

If your hardware supports it - yes. You'll need something like the compaq
hotswap pci backplanes or of course simply use cardbus
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Re: Hot swap support in linux?

[Greg KH]

On Wed, Jan 02, 2002 at 05:28:50PM +0530, Raghavendra Koushik wrote:
> few more questions pertaining to hot swap..
> 1. 	how exactly do I build my linux kernel with hotswap support. When I do
> 	'make xconfig' (for linux 2.4.4 kernel) I don't see a hotplug option.

The PCI Hotplug code is not in the 2.4.4 kernel.  It went in around
2.4.16 or so.

> 2.	If I write my driver according to the new way of writing PCI drivers for
>     	ethernet cards i.e using MODULE_DEVICE_TABLE et al, is it enough
>     	to make my driver hot pluggable.

Yes.

> 3.	Does the NIC need to provide any particular h/w support to make it
> 	hotpluggable.

No.  The pci hotplug stuff is handled by a separate controller that
handles the initialization and shutdown of the individual PCI cards.

Hope this helps,

greg k-h