Re: Status of the next68k port (SCSI controller/disk)?

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

Hi,

> > Then it looks recent NetBSD/next68k GENERIC kernels including 9.3 have
> > several problems:
> > 
> > 9.3:   Ethernet doesn't work, keyboard doesn't work, SCSI doesn't work
> > 8.2:   ditto
> 
> > 7.2:   Ethernet works, keyboard doesn't work, SCSI doesn't work
> > 6.1.5: Ethernet works, keyboard works, SCSI doesn't work
> > 5.2.3: All Ethernet, keyboard, and SCSI work
> 
> Thanks a lot - by coincidence, I ran very similar tests last night on my 
> mono non-Turbo NeXTstation. 
> 
> > So trying 5.2.3 binaries might be worth to debug emulators:
> > http://archive.netbsd.org/pub/NetBSD-archive/NetBSD-5.2.3/next68k/
> 
> Good to see that my results are confirmed - so testing with 5.2.3 is the 
> only thing that makes sense for now. I was quite a bit surprised that 
> these regressions managed to stay undiscovered for such a long time,
> but most people still running NeXT machines today will probably only
> use NeXTstep or OPENstep...

Indeed, not only next68k but also many other Tier-II ports have
a very few users so need overhaul periodically :-)

Now I've investigated several problems:

- delay_divisor value for delay(9) was not correct so
  shorter delay(9) could be problematic on device accesses:
  https://github.com/tsutsui/netbsd-src/commit/883462c5f624232ae5e04ac0705057175be8dbf5

- DMA interrupts for esp(4) SCSI didn't work properly:
  https://github.com/tsutsui/netbsd-src/commit/a5dcbaa7e1d33a8f11ae49e04ab369d9f6790c34

- nextkbd(4) console read function was unintentionally optimized out:
  https://github.com/tsutsui/netbsd-src/commit/458feeb03c1720f51319411d60467491c03e8ff6

I'll commit these fixes after more confirmation.

On -current (trunk) the xe(4) Ethernet works fine without any fixes,
but it still doesn't work on netbsd-9.  I don't see particular
differnece on if_xe.c and mb8795.c, but I'll try bisect again
between netbsd-7 and netbsd-8 later.

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NetBSD 10.99.2 (GENERIC) #14: Sat Jan 21 04:11:12 JST 2023
	tsutsui@mirage:/s/cvs/src/sys/arch/next68k/compile/GENERIC
NeXT/MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches
total memory = 32760 KB
avail memory = 27624 KB
timecounter: Timecounters tick every 10.000 msec
intrmask: 0x35f800
intrstat: 0x35f000
mainbus0 (root)
intio0 at mainbus0
esp0 at intio0 addr 0x2114000
zsc0 at intio0 addr 0x2118000
zstty0 at zsc0 channel 0
zstty1 at zsc0 channel 1
nextdma0 at intio0 addr 0x2000010: channel 0 (scsi)
nextdma1 at intio0 addr 0x2000110: channel 1 (enetx)
nextdma2 at intio0 addr 0x2000150: channel 2 (enetr)
xe0 at intio0 addr 0x2106000
xe0: MAC address 00:00:0f:00:b6:a9
xe0: using DMA channels nextdma1 nextdma2
nextkbd0 at intio0 addr 0x200e000
wskbd0 at nextkbd0 (mux ignored): console keyboard
esp0: ESP100A, 20MHz, SCSI ID 7
scsibus0 at esp0: 8 targets, 8 luns per target
esp0: using DMA channel nextdma0
nextdisplay0 at mainbus0: 1120 x 832, 2bpp
wsdisplay0 at nextdisplay0 (kbdmux ignored): console (mono, vt100 emulation), using wskbd0
Looks like a MC68HC68T1 (old style) clock chip.
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
scsibus0: waiting 2 seconds for devices to settle...
WARNING: system needs entropy for security; see entropy(7)
sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST51080N, 0958> disk fixed
sd0: 1030 MB, 4826 cyl, 4 head, 109 sec, 512 bytes/sect x 2109840 sectors
sd0: async, 8-bit transfers
boot device: xe0
root on xe0
nfs_boot: trying DHCP/BOOTP
nfs_boot: DHCP next-server: 192.168.20.1
nfs_boot: my_domain=ceres.dti.ne.jp
nfs_boot: my_addr=192.168.20.77
nfs_boot: my_mask=255.255.255.0
nfs_boot: gateway=192.168.20.1
root on mirage:/r/export/NetBSD/next68k/root
root file system type: nfs
kern.module.path=/stand/next68k/10.99.2/modules
WARNING: clock lost 5 days
WARNING: using filesystem time
WARNING: CHECK AND RESET THE DATE!
---

Have fun,
---
Izumi Tsutsui