Re: [ES40-developers] sym810 questions

[Camiel V. <iam...@gm...>]

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 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...

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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