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Date: Wed, 02 Jun 2004 08:13:55 -0400
From: Aniruddha Bohra <bohra@cs.rutgers.edu>
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To: "Kenneth D. Merry" <ken@kdm.org>
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cc: freebsd-scsi@freebsd.org
Subject: Re: SCSI device question
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Kenneth D. Merry wrote:
> On Tue, Jun 01, 2004 at 18:56:02 -0400, Aniruddha Bohra wrote:
> 
>>Hello,
>>	All SCSI devices cam/scsi/scsi_xx.c
>>do the following :
>>     /*
>>      * Install a global async callback.  This callback will
>>      * receive async callbacks like "new device found".
>>      */
>>                csa.event_enable = AC_FOUND_DEVICE;
>>                csa.callback = passasync;
>>
>>	However, I did not find the code where the event is
>>triggered. Is it automatically done by the rescan code?
>>Is there a standard way to indicate to the peripheral drivers
>>that there is a new device on the bus?
> 
> 
> See sys/cam/cam_xpt.c, the function probedone() in the
> PROBE_TUR_FOR_NEGOTIATION case.  (xpt_async(AC_FOUND_DEVICE, path, ccb))
> 
> It's triggered by a rescan or initial probe at boot.

Thanks a lot.

> 
> What are you trying to do?

I am just trying to understand the code.

Thanks
Aniruddha