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Date: Wed, 03 Jun 2009 20:28:05 -0700
From: Sam Leffler <sam@freebsd.org>
Organization: FreeBSD Project
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To: David Somayajulu <david.somayajulu@qlogic.com>
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Cc: "freebsd-drivers@freebsd.org" <freebsd-drivers@freebsd.org>
Subject: Re: How do I pass configuration parameters to a FreeBSD Device
 Driver ?
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David Somayajulu wrote:
> Larry Maloney wrote:
>   
>> David Somayajulu wrote:
>>     
>>> Hi All,
>>> I would appreciate if you could let me know, how I can pass
>>>       
>> configuration parameters to a device driver, which can be processed
>> during either probe() or attach() ? Is there a way to read them from a
>> conf file of some sort ? Basically, I am interested in setting some
>> tunable parameters during driver initialization, without needing to
>> recompile the driver every time.
>>     

loader(8) allows you to set tunable parameters before boot; this is 
equivalent to linux-style module parameters (mostly).  Unfortunately I 
don't see anything in the man pages that documents them; check 
sys/sys/kernel.h for the details and/or loader(8).

    Sam