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Subject53c810 SCSI controller not accessible on type-2 config PCI [Kerne l 2.4.17]
Date
Hi,

upgrading from Suse 7.1 [Kernel 2.2.18] to 7.3 [Kernel 2.4.10], I
found that my type-2 PCI bus was no longer detected. Read Linus'
posting of 2001-10-08 [Re: PCI problem with 2.4.10 on 82434LX Chipset]
and realized that 2.4.10 is 'supposed' to not support type-2 config
PCI. Compiled 2.4.17 kernel, but had problems accessing the SCSI
controller (Symbios 53c810). Tryed also kernel 2.4.4 - same situation
as for 2.4.17 kernel.

For Kernel 2.2.18, I get the following output:
Kernel Bootmessages:
---------------------------------------------------------------------------
PCI: PCI BIOS revision 2.00 entry at 0xfb370, last bus=15
PCI: Using configuration type 2
PCI: Probing PCI hardware
[...]
scsi : 0 hosts.
scsi : detected total.
[...]
ncr53c8xx: at PCI bus 0, device 5, function 0
ncr53c8xx: MMIO base address disabled.
sym53c8xx: at PCI bus 0, device 5, function 0
sym53c8xx: not initializing, device not supported
scsi-ncr53c7,8xx : at PCI bus 0, device 5, function 0
scsi-ncr53c7,8xx : NCR53c810 at memory 0x0, io 0xd000, irq 10
scsi0 : burst length 8
scsi0 : reset ccf to 3 from 0
scsi0 : NCR code relocated to 0x2a60610 (virt 0xc2a60610)
scsi0 : test 1 started
scsi0 : NCR53c{7,8}xx (rel 17)
[...]
linuxrc uses obsolete /proc/pci interface
---------------------------------------------------------------------------

Output of 'cat /proc/pci'
----------------------------------------------------------------
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Intel 82434LX Mercury/Neptune (rev 3).
Slow devsel. Master Capable. Latency=32.
Bus 0, device 2, function 0:
Non-VGA device: Intel 82378IB (rev 3).
Medium devsel. Master Capable. No bursts.
Bus 0, device 5, function 0:
Non-VGA device: NCR 53c810 (rev 1).
Medium devsel. IRQ 10. Master Capable. Latency=80.
I/O at 0xd000 [0xd001].
Bus 0, device 6, function 0:
VGA compatible controller: S3 Inc. Trio32/Trio64 (rev 84).
Medium devsel. IRQ 11.
Non-prefetchable 32 bit memory at 0xfc000000 [0xfc000000].
----------------------------------------------------------------

Output of 'cat /proc/ioports'
----------------------------------------------------------------
[...]
03f8-03ff : serial(auto)
d000-d07f : ncr53c7,8xx
----------------------------------------------------------------

For Kernel 2.4.17, I get the following output:
Kernel Bootmessages (no Kernel options):
----------------------------------------------------------------
PCI: PCI BIOS revision 2.00 entry at 0xfb370, last bus=15
PCI: Using configuration type 2
PCI: Probing PCI Hardware
PCI: Discovered peer bus 01
PCI: Discovered peer bus 02
PCI: Discovered peer bus 03
PCI: Discovered peer bus 04
PCI: Discovered peer bus 05
PCI: Discovered peer bus 06
PCI: Discovered peer bus 07
PCI: Discovered peer bus 08
PCI: Discovered peer bus 09
PCI: Discovered peer bus 0a
PCI: Discovered peer bus 0b
PCI: Discovered peer bus 0c
PCI: Discovered peer bus 0d
PCI: Discovered peer bus 0e
PCI: Discovered peer bus 0f
PCI: Device 00:10 not found by BIOS
PCI: Device 00:28 not found by BIOS
PCI: Device 00:30 not found by BIOS
PCI: Device 01:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 01:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 02:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 03:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 04:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 05:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 06:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 07:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 08:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 09:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0a:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0b:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0c:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0d:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0e:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
PCI: Device 0f:00 not found by BIOS
PCI: BIOS reporting unknown device 00:00
[...]
SCSI subsystem driver Revision: 1.00
PCI: Device 00:05.0 not available because of resource collisions
----------------------------------------------------------------

Kernel Bootmessages (boot option 'pci=conf1'):
----------------------------------------------------------------
PCI: PCI BIOS revision 2.00 entry at 0xfb370, last bus=15
PCI: No PCI bus detected
----------------------------------------------------------------

Kernel Bootmessages (boot option 'pci=conf2' or 'pci=nobios'):
----------------------------------------------------------------
PCI: Using configuration type 2
PCI: Probing PCI Hardware
[...]
SCSI subsystem driver Revision: 1.00
PCI: Device 00:05.0 not available because of resource collisions
----------------------------------------------------------------

Output of 'cat /proc/pci'
----------------------------------------------------------------
PCI devices found:
Bus 0, device 0, function 0:
Class 0600: PCI device 8086:04a3 (rev 3)
Master Capable. Latency=32.
Bus 0, device 2, function 0:
Class 0000: PCI device 8086:0484 (rev 3)
Bus 0, device 5, function 0:
Class 0000: PCI device 1000:0001 (rev 1)
IRQ 10
Master Capable. Latency=80.
I/O at 0xd000 [0xd0ff]
Non-prefetchable 32 bit memory at 0x0 [0xff]
Bus 0, device 6, function 0:
Class 0300: PCI device 5333:8811 (rev 84)
IRQ 11
Non-prefetchable 32 bit memory at 0xfc000000 [0xffffffff].
----------------------------------------------------------------

Output of 'cat /proc/ioports'
----------------------------------------------------------------
[...]
03f8-03ff : serial(auto)
0cf8-0cfb : PCI conf2
d000-d0ff : PCI device 1000:0001
----------------------------------------------------------------

In summary:
- With no boot option, 2.4.17 detects peer busses where there are
none.
- With boot option 'pci=conf2', 2.4.17 detects a resource collision
for the SCSI controller (PCI device 5), making it unaccessible to
any SCSI low-level driver - but 2.2.18 did not detect such a
resource collision.

My Hardware:
Mainboard: ASUS P_I-P5MP3 60/66 MHz, Intel Processor Socket 4
CPU: Pentium Overdrive 133 MHz
SCSI Controller: Symbios 53c810 (rev. 1) on an ASUS SC-200 Controller
card. The SCSI controller does not support MMIO.

Thanks in advance for any advice how to solve this problem.

Regards,
Christian Bartels
-
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