Re: DEC PWS500au (MiataGL) EIDE Issues

[Jason Thorpe <thorpej%me.com@localhost>]

I’ll poke around …

-- thorpej
Sent from my iPhone.

> On May 16, 2021, at 5:36 AM, Rhialto <rhialto%falu.nl@localhost> wrote:
> 
> On Sat 15 May 2021 at 21:27:33 -0400, Alexander Jacocks wrote:
>> All,
>> 
>> I?m trying to install NetBSD 9.1 on my Personal Workstation 500au
>> (MiataGL), and I?m running into EIDE issues. Whenever I try to access any
>> attached EIDE disk (or SATA disk, with a SATA/IDE bridge) I get the
>> following:
>> 
>> wd0c: device timeout reading fsbn 9 (wd0 bn 0; cn 0 tn 0 sn 0), xfer 38,
>> retry 0
>> cypide0:0:0: geometry timed out
>> 
>> This happens across a bunch of disks, with several different IDE cables,
>> both 40 and 80 conductor.
>> 
>> Does anyone have any ideas?
> 
> This sounds very similar to a known issue with DMA not being able to
> cross some boundaries (64 K?) in the Miata's chipset.
> 
> A simple solution is to turn off DMA for the built-in IDE.
> At some point I plugged in a separate PCI IDE card to get around it in a
> different way. There was this in my kernel config for NetBSD 1.6:
> 
> # ST506/ESDI/IDE devices
> wd*     at      pciide0 channel ? flags 0xffc   # Use PIO mode 4, no DMA
> wd*     at      pciide? channel ?               # Allow DMA on IDE cards
> 
> or this from 2.0:
> 
> # ATA (IDE) bus support
> # atabus0 at ata0
> atabus0 at cmdide0 channel 0
> atabus1 at cmdide0 channel 1
> atabus* at ata?
> 
> # IDE drives
> wd*     at      atabus0 drive ? flags 0xffc     # Use PIO mode 4, no DMA
> wd*     at      atabus1 drive ? flags 0xffc     # Use PIO mode 4, no DMA
> wd*     at      atabus? drive ?                 # Allow DMA on IDE cards
> 
> That's the latest version I have on my Alpha though (and currently it is
> unused in storage).
> 
> I do notice your message mentions "cypide0" and not "cmdide0" so maybe
> it's a different issue.
> 
> -Olaf.
> -- 
> ___ Q: "What's an anagram of Banach-Tarski?"  -- Olaf "Rhialto" Seibert
> \X/ A: "Banach-Tarski Banach-Tarski."         -- rhialto at falu dot nl