port-vax/51761: SCSI gets stuck on VAXstation 4000

[flxd%NetBSD.org@localhost]

>Number:         51761
>Category:       port-vax
>Synopsis:       SCSI gets stuck on VAXstation 4000
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-vax-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 02 16:05:00 +0000 2017
>Originator:     Felix Deichmann
>Release:        7.99.53
>Organization:
>Environment:
NetBSD 7.99.53 (INSTALL.201612310510Z) vax
>Description:
SCSI gets stuck when unpacking sets in sysinst (or accessing fs) on a VAXstation 4000 (asc at vsbus) using -current. NetBSD-7 is fine.
Happens with different disks and different machines, VAXstation 4000/96 and 4000/60.
The problem occurs within seconds after/during disk access on the VAXstation 4000/96, but is harder to reproduce on the 4000/60 (can take much longer to happen, seems more difficult to produce concurrent requests?).
Tested workaround is to set adapt->adapt_openings = 1 in src/sys/dev/ic/ncr53c9x.c.


VAXstation 4000/96:

NetBSD 7.99.53 (INSTALL.201612310510Z)
MicroVAX 4000/{90,90A,96}
total memory = 127 MB
avail memory = 119 MB
mainbus0 (root)
cpu0 at mainbus0: KA49, NVAX, 10KB L1 cache, 256KB L2 cache
ze0 at mainbus0
ze0: hardware address 00:00:f8:xx:xx:xx
vsbus0 at mainbus0
vsbus0: 8K entry DMA SGMAP at PA 0x27000000 (VA 0x8af91000)
vsbus0: interrupt mask 0
dz0 at vsbus0 csr 0x25000000 vec 524 ipl 17 maskbit 3
dz0: 4 lines
lkkbd0 at dz0
lkkbd0: no keyboard
wskbd0 at lkkbd0 (mux ignored)
asc0 at vsbus0 csr 0x26000080 vec 510 ipl 17 maskbit 1
asc0: NCR53C94, 25MHz, SCSI ID 6
scsibus0 at asc0: 8 targets, 8 luns per target
spx0 at vsbus0 csr 0x38000000 vec 514 ipl 15 maskbit 2
spx0: Using Boldface 8x16 font
spx0: RAMDAC ID: 0x4a, Bt459 (SPX/LCSPX) RAMDAC type
wsdisplay0 at spx0 (kbdmux ignored)
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 0 lun 0: <DEC, RZ28M    (C) DEC, 0616> disk fixed
sd0: 2007 MB, 3045 cyl, 16 head, 84 sec, 512 bytes/sect x 4110480 sectors
sd0: sync (160.00ns offset 15), 8-bit (6.250MB/s) transfers, tagged queueing
boot device: ze0
root on md0a dumps on md0b
root file system type: ffs

# df -k
Filesystem    1K-blocks       Used      Avail %Cap Mounted on
/dev/md0a          1899       1794        105  94% /
/dev/sd0a       1764206         20    1675976   0% /mnt
# dd if=/dev/zero of=/mnt/test bs=64k count=1024
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
 0053+0 recorsd0(asc0:0:0:0): dcommand aborteds, data =  00i 00n 00
    4e1 005 012 00+ 000 00
records out
9961472 bytes transferred in 1.946 secs (5118947 bytes/sec)

# sd0(asc0:0:0:0): command aborted, data = 00 00 00 00 4e 00 01 00 00 00
sd0(asc0:0:0:0): asc0: timed out [ecb 0x87eccf88 (flags 0x1, dleft 10000, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
sd0(asc0:0:0:0): asc0: timed out [ecb 0x87eccb60 (flags 0x1, dleft 10000, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
sd0(asc0:0:0:0): asc0: timed out [ecb 0x87eccd58 (flags 0x1, dleft 10000, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
[much more of above "timed out" messages follow]


VAXstation 4000/60:

NetBSD 7.99.53 (INSTALL.201612310510Z)
VAXstation 4000/60
total memory = 81500 KB
avail memory = 74484 KB
mainbus0 (root)
cpu0 at mainbus0: KA46, Mariah, 2KB L1 cache, 256KB L2 cache
vsbus0 at mainbus0
vsbus0: 32K entry DMA SGMAP at PA 0x6e0000 (VA 0x806e0000)
vsbus0: interrupt mask 0
le0 at vsbus0 csr 0x200e0000 vec 770 ipl 17 maskbit 1 buf 0x0-0xffff
le0: address 08:00:2b:xx:xx:xx
le0: 32 receive buffers, 8 transmit buffers
dz0 at vsbus0 csr 0x200a0000 vec 124 ipl 17 maskbit 4
dz0: 4 lines
lkkbd0 at dz0
lkkbd0: no keyboard
wskbd0 at lkkbd0 (mux ignored)
asc0 at vsbus0 csr 0x200c0080 vec 774 ipl 17 maskbit 0
asc0: NCR53C94, 25MHz, SCSI ID 7
scsibus0 at asc0: 8 targets, 8 luns per target
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 0 lun 0: <DEC, RZ28M    (C) DEC, 0616> disk fixed
sd0: 2007 MB, 3045 cyl, 16 head, 84 sec, 512 bytes/sect x 4110480 sectors
sd0: sync (160.00ns offset 15), 8-bit (6.250MB/s) transfers, tagged queueing
boot device: le0
root on md0a dumps on md0b
root file system type: ffs

# sync
asc0: reselect from target 0 lun 0 tag 20:38 with no nexus; sending ABORT
asc0: target didn't send tag: 0 bytes in fifo
sd0: async, 8-bit transfers
# sd0(asc0:0:0:0): asc0: timed out [ecb 0x84ed6888 (flags 0x1, dleft a800, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
sd0(asc0:0:0:0): asc0: timed out [ecb 0x84ed6850 (flags 0x1, dleft 2000, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
sd0(asc0:0:0:0): asc0: timed out [ecb 0x84ed6818 (flags 0x1, dleft 3000, stat 0)], <state 1, nexus 0x0, phase(l 10, c 100, p 3), resid 0, msg(q 0,o 0) >
[much more of above "timed out" messages follow]
>How-To-Repeat:
Try to install NetBSD-current to disk using sysinst (boot install.ram over network) on a VAXstation 4000.
>Fix:
Workaround: adapt->adapt_openings = 1 in src/sys/dev/ic/ncr53c9x.c