Re: [ES40-developers] sym810 questions

[Brian W. <bdw...@in...>]

On Mon, 2008-02-18 at 16:21 +0100, Camiel Vanderhoeven wrote:
> Hello Brian,
> 
> All these register addresses are reserved in the 53C810; The 53C895
> (newer generation, wide scsi chip) recognizes 0x4b as RESPID1 (used if
> you want the controller to respond to any of the target ID's 8 to 15),
> 52 as STEST4, and 59 as the MSB of the SCSI bus data lines.
> 
> So it could be that Gentoo has misidentified the scsi chip (not very
> likely, as it says <810>), or has a lot of generic driver code. In
> that case it shouldn't matter how the 810 handles those reserved
> accesses (I think it should return 0 on any read, and do nothing on
> any write)
> 

It looks like a generic code case.  There's a struct in the linux source
that I'm pretty sure they use to access the driver data.  The locations
that aren't in the 810 driver are marked as 895/896 


> It would be interesting to see what happens if you run it with
> DEBUG_SCSI and DEBUG_SYM defined (a lot of output, but probably well
> worth it). If you want to, you can mail the output to me, and I'll try
> to figure out what Gentoo tries to do that doesn't work yet...
> 

I've attached the output.  Its got some other debugging tidbits in it as
well.  Just as a reference, pci0.3 has devices 0-3 as disks, and pci0.5
has devices 0-6 as cdroms.

Brian


> Camiel.
> 
> On Feb 18, 2008 4:09 PM, Brian Wheeler <bdw...@in...> wrote:
> > I tried booting gentoo using the 810 chipset and removing all of the ide
> > devices (which was hanging it) and it got much farther into the boot
> > process.
> >
> > It looks like there are timeout issues with the devices, since linux
> > offlines all of the devices after walking through them:
> >
> > sym0: <810> rev 0x1 at pci 0000:00:03.0 irq 32
> > sym0: No NVRAM, ID 7, Fast-10, SE, parity checking
> > sym0: SCSI BUS has been reset.
> > scsi0 : sym-2.2.3
> > scsi 0:0:0:0: ABORT operation started.
> > scsi 0:0:0:0: ABORT operation timed-out.
> > scsi 0:0:0:0: DEVICE RESET operation started.
> > scsi 0:0:0:0: DEVICE RESET operation timed-out.
> > scsi 0:0:0:0: BUS RESET operation started.
> > scsi 0:0:0:0: BUS RESET operation timed-out.
> > scsi 0:0:0:0: HOST RESET operation started.
> > sym0: SCSI BUS has been reset.
> >
> >
> > It may also have something to do with these addresses:
> > 0x4b (write)
> > 0x17, 0x52, 0x59 (read)
> >
> > I put dummy stubs in for them and that's the only reason it got that
> > far :)
> >
> > Camiel, do any of these show up on your datasheet?  They are not on
> > mine:
> >
> > SYM53C810A
> >  PCI-SCSI I/O Processor
> > Data Manual
> > Version 2.0
> >
> > T07962I
> >
> > I'll probably take a look at the driver source and see what I can come
> > up with.
> >
> >
> > Just as an FYI, having more than one '810 device in the system works
> > fine :)
> >
> > Brian
> >
> >
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