New Driver for MegaRaid 6Gb/s and 12Gb/s Card

[Desai, Kashyap]

> -----Original Message-----
> From: Gary Palmer [mailto:gpalmer at freebsd.org]
> Sent: Friday, April 19, 2013 11:47 PM
> To: kpneal at pobox.com
> Cc: Desai, Kashyap; freebsd-scsi at freebsd.org
> Subject: Re: New Driver for MegaRaid 6Gb/s and 12Gb/s Card
> 
> On Fri, Apr 19, 2013 at 12:18:09PM -0400, kpneal at pobox.com wrote:
> > On Fri, Apr 19, 2013 at 12:30:09PM +0530, Desai, Kashyap wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: matt [mailto:sendtomatt at gmail.com]
> > > > Sent: Thursday, April 18, 2013 8:05 PM
> > > > To: Desai, Kashyap
> > > > Cc: sbruno at freebsd.org; freebsd-scsi at freebsd.org; Kenneth D.
> > > > Merry; McConnell, Stephen; jhb at freebsd.org
> > > > Subject: Re: New Driver for MegaRaid 6Gb/s and 12Gb/s Card
> > > >
> >
> > > > Would those only be supported by mfi, or by mrsas and mfi?
> > > > Is there already a mrsasutil being planned to replace mfiutil?
> > >
> > >
> > > New management interface will be expose by mrsas as "/dev/mrsasX".
> If mfiutil has flexibility to work on "/dev/mrsasX" instead of
> "/dev/mfiX" we can extend the same utility for mrsas.
> >
> > It would be confusing to have to use "mfi"util to control "mrsas"
> devices.
> >
> > At the least there needs to be a different name for the utility that
> > either reflects the /dev/ device name or otherwise applies to some
> > kind of name for the utility. A new "mrsasutil" utility would fit the
> > bill.  A combined mfi/mrsas utility would as well if it had a name
> > that is more generic but not too broad.
> >
> > mrutil? (MegaRaid ...)
> > lsiutil?
> >
> > I'm fresh out of other ideas for names, sorry.
> 
> Make mrsasutil a hard link to mfiutil and then alter the code to DTRT
> depending on which link was used to call the program.  There is
> precedence for this in the tree already (maybe not for this kind of
> device management utility, but other bits)

To change "mfiutil" to work with "mrsas" driver is possible with few devclass changes in mfiutil along with other IOCTL code change, but it need significant time to analyze mfiutil code.




> 
> Gary