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From: "David McIlwraith" <quack@bigpond.net.au>
To: <linux-kernel@vger.kernel.org>, <linux-smp@vger.kernel.org>
Subject: PROBLEM: DAC960 kernel driver hangs with SMP enabled
Date: Fri, 21 Jun 2002 11:22:56 +1000
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[1.] One line summary of the problem:
DAC960 driver hangs at boot with SMP enabled
[2.] Full description of the problem/report:
The DAC960 driver, after displaying its 2-line initial version message,
hangs at boot, on a Linux 2.4.18 kernel with SMP enabled. I tested Linux
version 2.2.21 kernel as well; I encountered the same problem. After
disabling SMP [and no other options] the driver performed correctly.
The controller in question is a DAC960PG, running with the latest
firmware from http://www.mylex.com/. No problems have been encountered
with any other operating systems.

I attempted to use patches I had found on the [linux-smp], [linux-kernel]
mailing lists, referring to
a deadlock occurring with this driver and SMP. However, the kernel still
refused to boot correctly.
[3.] Keywords:
kernel, DAC960, Mylex, RAID, SCSI
[4.] Kernel version:
Linux version 2.4.x with SMP, 2.2.x with SMP
[5.] Output of Oops.. message:
Not applicable.
[6.] A small shell script or program which triggers the problem:
Not applicable.
[7.] Environment
The machine in question is an NEC Express5800/130A Pro dual processor
system, with 2x Pentium Pro 200MHz processors, running Debian 2.2.
[7.1.] Software
Linux linux 2.4.18 #7 Thu Jun 20 15:09:48 EST 2002 i686 unknown

Gnu C                  2.95.2
Gnu make               3.79.1
binutils               2.9.5.0.37
util-linux
util-linux             Note: /usr/bin/fdformat is obsolete and is no longer
available.
util-linux             Please use /usr/bin/superformat instead (make sure
you have the
util-linux             fdutils package installed first).  Also, there had
been some
util-linux             major changes from version 4.x.  Please refer to the
documentation.
util-linux
mount                  2.10f
modutils               2.3.11
e2fsprogs              1.18
PPP                    2.3.11
Linux C Library        2.1.3
ldd: version 1.9.11
Procps                 2.0.6
Net-tools              1.54
Console-tools          0.2.3
Sh-utils               2.0
[7.2.] Processor information:
Note: only one processor shown, since kernel with SMP fails to boot;
however, both processors are identical.

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model  : 1
model name : Pentium Pro
stepping : 9
cpu MHz  : 198.961
cache size : 256 KB
fdiv_bug : no
hlt_bug  : no
f00f_bug : no
coma_bug : no
fpu  : yes
fpu_exception : yes
cpuid level : 2
wp  : yes
flags  : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
bogomips : 396.49
[7.3.] Module information:
Not applicable; kernel was built without module support.
[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
IO ports:
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : Compaq Computer Corporation Triflex Dual EIDE Controller
01f0-01f7 : Compaq Computer Corporation Triflex Dual EIDE Controller
  01f0-01f7 : ide0
02f8-02ff : serial(set)
0376-0376 : Compaq Computer Corporation Triflex Dual EIDE Controller
03c0-03df : vga+
03f6-03f6 : Compaq Computer Corporation Triflex Dual EIDE Controller
  03f6-03f6 : ide0
03f8-03ff : serial(set)
0cf8-0cff : PCI conf1
d000-dfff : PCI Bus #02
  d400-d4ff : Realtek Semiconductor Co., Ltd. RTL-8139
    d400-d4ff : 8139too
  d800-d8ff : Adaptec AIC-7860
    d800-d8ff : aic7xxx
  dce0-dcff : Intel Corp. 82557 [Ethernet Pro 100]
    dce0-dcff : eepro100
ecf0-ecff : Compaq Computer Corporation Triflex Dual EIDE Controller
  ecf0-ecf7 : ide0

IO memory:
00000000-0009efff : System RAM
0009f000-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000c8000-000c87ff : Extension ROM
000c8800-000cb7ff : Extension ROM
000f0000-000fffff : System ROM
00100000-0fffffff : System RAM
  00100000-0021332e : Kernel code
  0021332f-002582cb : Kernel data
fceee000-fceeffff : Mylex Corporation DAC960PX
fd000000-fe9fffff : PCI Bus #02
  fd000000-fdffffff : Cirrus Logic GD 5446
  fe800000-fe8fffff : Intel Corp. 82557 [Ethernet Pro 100]
  fe9fd000-fe9fdfff : Intel Corp. 82557 [Ethernet Pro 100]
    fe9fd000-fe9fdfff : eepro100
  fe9fe000-fe9fefff : Adaptec AIC-7860
    fe9fe000-fe9fefff : aic7xxx
  fe9ff800-fe9ff8ff : Realtek Semiconductor Co., Ltd. RTL-8139
    fe9ff800-fe9ff8ff : 8139too
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff8119-ffffffff : reserved
[7.5.] PCI information ('lspci -vvv' as root)

00:00.0 Host bridge: Relience Computer: Unknown device 0005
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort+ >SERR- <PERR-
 Latency: 48 set, cache line size 08

00:0a.0 PCI bridge: Intel Corporation 80960RP [i960 RP
Microprocessor/Bridge] (rev 01) (prog-if 00 [Normal decode])
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 64 set, cache line size 08
 Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
 I/O behind bridge: 0000f000-00000fff
 Memory behind bridge: fff00000-000fffff
 Prefetchable memory behind bridge: ff000000-000fffff
 BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-

00:0a.1 RAID bus controller: Mylex Corporation DAC960PX (rev 01)
 Subsystem: Mylex Corporation: Unknown device 0010
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 64 set, cache line size 08
 Interrupt: pin A routed to IRQ 9
 Region 0: Memory at fceee000 (32-bit, prefetchable) [size=8K]
 Expansion ROM at <unassigned> [disabled] [size=32K]

00:0b.0 PCI bridge: Digital Equipment Corporation DECchip 21152 (rev 01)
(prog-if 00 [Normal decode])
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 123 set, cache line size 08
 Bus: primary=00, secondary=02, subordinate=02, sec-latency=68
 I/O behind bridge: 0000d000-0000dfff
 Memory behind bridge: fd000000-fe9fffff
 Prefetchable memory behind bridge: 00000000ff000000-0000000000000000
 BridgeCtl: Parity+ SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-

00:0f.0 ISA bridge: Compaq Computer Corporation Triflex PCI to ISA Bridge
(rev 0c)
 Subsystem: Compaq Computer Corporation: Unknown device a0f3
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 0 set

00:0f.1 IDE interface: Compaq Computer Corporation: Unknown device ae33 (rev
0a) (prog-if ea)
 Subsystem: Compaq Computer Corporation: Unknown device ae33
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 0 set
 Interrupt: pin A routed to IRQ 0
 Region 0: I/O ports at 01f0 [size=8]
 Region 1: I/O ports at 03f4
 Region 2: I/O ports at 0170 [size=8]
 Region 3: I/O ports at 0374
 Region 4: I/O ports at ecf0 [size=16]

02:06.0 VGA compatible controller: Cirrus Logic GD 5446 (prog-if 00 [VGA])
 Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Region 0: Memory at fd000000 (32-bit, prefetchable) [size=16M]
 Expansion ROM at <unassigned> [disabled] [size=32K]

02:07.0 SCSI storage controller: Adaptec AIC-7860 (rev 01)
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 4 min, 4 max, 64 set, cache line size 08
 Interrupt: pin A routed to IRQ 11
 Region 0: I/O ports at d800 [disabled] [size=256]
 Region 1: Memory at fe9fe000 (32-bit, non-prefetchable) [size=4K]

02:08.0 Ethernet controller: Intel Corporation 82557 [Ethernet Pro 100] (rev
01)
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 8 min, 56 max, 66 set
 Interrupt: pin A routed to IRQ 5
 Region 0: Memory at fe9fd000 (32-bit, prefetchable) [size=4K]
 Region 1: I/O ports at dce0 [size=32]
 Region 2: Memory at fe800000 (32-bit, non-prefetchable) [size=1M]
 Expansion ROM at <unassigned> [disabled] [size=1M]

02:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RT8139 (rev 10)
 Subsystem: Realtek Semiconductor Co., Ltd. RT8139
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
 Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 Latency: 32 min, 64 max, 64 set
 Interrupt: pin A routed to IRQ 9
 Region 0: I/O ports at d400 [size=256]
 Region 1: Memory at fe9ff800 (32-bit, non-prefetchable) [size=256]
 Expansion ROM at <unassigned> [disabled] [size=64K]
 Capabilities: [50] Power Management version 2
  Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME-
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-

[7.6.] SCSI information (from /proc/scsi/scsi)
Attached devices: none
[7.7.] Other information that might be relevant to the problem
Data from: /proc/rd/c0/current_status [controller 0 information]

***** DAC960 RAID Driver Version 2.4.11 of 11 October 2001 *****
Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
Configuring Mylex DAC960PG PCI RAID Controller
  Firmware Version: 4.06-0-08, Channels: 1, Memory Size: 4MB
  PCI Bus: 0, Device: 10, Function: 1, I/O Address: Unassigned
  PCI Address: 0xFCEEE000 mapped at 0xD0800000, IRQ Channel: 9
  Controller Queue Depth: 64, Maximum Blocks per Command: 128
  Driver Queue Depth: 63, Scatter/Gather Limit: 33 of 33 Segments
  Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 128/32
  Physical Devices:
    0:0  Vendor: SEAGATE   Model: ST34371W          Revision: 0484
         Serial Number: JDP417330J6N3C
         Disk Status: Online, 8495104 blocks
    0:1  Vendor: SEAGATE   Model: ST34371W          Revision: 0484
         Serial Number: JDY9579709XP48
         Disk Status: Online, 8495104 blocks
    0:2  Vendor: SEAGATE   Model: ST34572WC         Revision: 0784
         Serial Number: JK2616440V0B9K
         Disk Status: Online, 8888320 blocks
    0:6  Vendor: SDR       Model: GEM200            Revision: 1
  Logical Drives:
    /dev/rd/c0d0: RAID-0, Online, 25485312 blocks, Write Thru
  No Rebuild or Consistency Check in Progress
[X.] Other notes, patches, fixes, workarounds:
In order to boot this kernel, I also had to add a patch which is
referenced at http://linux-kernel.skylab.org/20011125/msg01431.html. As
the author of the DAC960 driver notes, "the Linux kernel team has
consistently refused to add the boot patches to init/main.c". However,
this is an entirely separate issue to the SMP conflict.

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