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Date:      Tue, 14 Sep 1999 16:42:42 +0930 (CST)
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        freebsd-stable@freebsd.org
Subject:   PCI card initialisation order?
Message-ID:  <XFMail.990914164242.doconnor@gsoft.com.au>

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Hi,
I have a custom data acquisition system here which runs FreeBSD (yay!).
It used to be 2.2.8+CAM, but I am pushing to make our new setup run 3-STABLE.

I upgraded a machine here, and after that our custom PCI card stopped working
properly. I fixed this by going into the BIOS and changing the option labelled
'PCI Device Search Order' from 'First-Last' to 'Last-First'. The problem can
also be fixed by swapping the network card and custom DA card around.

The problem appears to be that the interrupt handler (at least) is never
called. (I can tell because a printf I placed in the interrupt handler doesn't
do anything)

I would assume its a BIOS/mobo bug but the exact same setup worked fine in
2.2.8+CAM.

This is a Supermicro P6SBS (Intel 440BX chipset) with 128meg of RAM and a
PII-450.

The card order in the slots is Dec21143, Nothing, Custom DA card, S3 Virge DX.
(From 1 to 4)

There is one difference in the dmesg's which illustrates that the BIOS set the
cards up slightly differently, ie
The non working setup ->
Working around PLX bug for PCIBAR0
Working around PLX bug for PCIBAR1
gsio0: LCR at 0xe080, I/O at 0xefa0, memory at 0xc581c000

And the working setup ->
Working around PLX bug for PCIBAR0
gsio0: LCR at 0xec00, I/O at 0xefa0, memory at 0xc581c000

The LCR is a region of registers to control the PLX 9050 chip we use to do the
PCI goo, the I/O region is a region we use to control the hardware which
is memory mapped.

The 'PLX bug' is a problem in the PLX chip such that if bit 7 of the address is
set then the chip will not allow the bus master to read from that region (oops).

So basically my question is, has anyone seen this sort of behaviour before?

---
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum

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Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
	The Regents of the University of California. All rights reserved.
FreeBSD 3.3-RC #2: Tue Sep 14 14:08:32 CST 1999
    root@test2.gsoft.com.au:/local0/src/sys/compile/GENESIS
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium III (451.03-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x672  Stepping = 2
  Features=0x387fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
OV,PAT,PSE36,<b18>,MMX,FXSR,<b25>>
real memory  = 134217728 (131072K bytes)
config> di lnc0
No such device: lnc0
Invalid command or syntax.  Type `?' for help.
config> di le0
No such device: le0
Invalid command or syntax.  Type `?' for help.
config> di ie0
No such device: ie0
Invalid command or syntax.  Type `?' for help.
config> di fe0
No such device: fe0
Invalid command or syntax.  Type `?' for help.
config> di ex0
No such device: ex0
Invalid command or syntax.  Type `?' for help.
config> di ep0
No such device: ep0
Invalid command or syntax.  Type `?' for help.
config> di ed0
No such device: ed0
Invalid command or syntax.  Type `?' for help.
config> di cs0
No such device: cs0
Invalid command or syntax.  Type `?' for help.
config> di wt0
No such device: wt0
Invalid command or syntax.  Type `?' for help.
config> di scd0
No such device: scd0
Invalid command or syntax.  Type `?' for help.
config> di mcd0
No such device: mcd0
Invalid command or syntax.  Type `?' for help.
config> di matcd0
No such device: matcd0
Invalid command or syntax.  Type `?' for help.
config> di bt0
No such device: bt0
Invalid command or syntax.  Type `?' for help.
config> di aha0
No such device: aha0
Invalid command or syntax.  Type `?' for help.
config> di adv0
No such device: adv0
Invalid command or syntax.  Type `?' for help.
config> q
avail memory = 127619072 (124628K bytes)
Preloaded elf kernel "kernel" at 0xc02a3000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc02a309c.
Pentium Pro MTRR support enabled
Probing for devices on PCI bus 0:
chip0: <Intel 82443BX host to PCI bridge> rev 0x02 on pci0.0.0
chip1: <Intel 82443BX host to AGP bridge> rev 0x02 on pci0.1.0
chip2: <Intel 82371AB PCI to ISA bridge> rev 0x02 on pci0.7.0
ide_pci0: <Intel PIIX4 Bus-master IDE controller> rev 0x01 on pci0.7.1
chip3: <Intel 82371AB Power management controller> rev 0x02 on pci0.7.3
ahc0: <Adaptec aic7895 Ultra SCSI adapter> rev 0x04 int a irq 9 on pci0.14.0
ahc0: aic7895 Wide Channel A, SCSI Id=7, 16/255 SCBs
ahc1: <Adaptec aic7895 Ultra SCSI adapter> rev 0x04 int b irq 9 on pci0.14.1
ahc1: aic7895 Wide Channel B, SCSI Id=7, 16/255 SCBs
de0: <Digital 21143 Fast Ethernet> rev 0x41 int a irq 9 on pci0.15.0
de0: 21143 [10-100Mb/s] pass 4.1 (invalid EESPROM checksum)
de0: address 00:40:c7:99:2d:71
gsio0: <Genesis Software I/O adapter> rev 0x01 int a irq 5 on pci0.18.0
gsio sc structure is at 0xc0c94000 and has size 49228
Working around PLX bug for PCIBAR0
gsio0: LCR at 0xec00, I/O at 0xefa0, memory at 0xc581c000
vga0: <S3 Trio 64 graphics accelerator> rev 0x16 int a irq 11 on pci0.20.0
Probing for devices on PCI bus 1:
Probing for PnP devices:
Probing for devices on the ISA bus:
sc0 on isa
sc0: VGA color <16 virtual consoles, flags=0x0>
atkbdc0 at 0x60-0x6f on motherboard
atkbd0 irq 1 on isa
psm0 irq 12 on isa
psm0: model Generic PS/2 mouse, device ID 0
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
ppc0 at 0x378 irq 7 on isa
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
lpt0: <generic printer> on ppbus 0
lpt0: Interrupt-driven port
wdc0 not found at 0x1f0
wdc1 not found at 0x170
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa
npx0 on motherboard
npx0: INT 16 interface
apm0 on isa
apm: found APM BIOS version 1.2
mdsio0: configured irq 10 not in bitmap of probed irqs 0xc0236150
mdsio0 at 0x3e8-0x3ef irq 10 on isa
mdsio0: type 16550A, 4-wire mode, automatic transmit control.
ccd0-3: Concatenated disk drivers
Waiting 2 seconds for SCSI devices to settle
de0: enabling 10baseT port
changing root device to da0s1a
cd0 at ahc0 bus 0 target 6 lun 0
cd0: <MATSHITA CD-R   CW-7503 1.04> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 8)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray c
losed
da0 at ahc1 bus 0 target 0 lun 0
da0: <WDIGTL WDE9180 ULTRA2 1.30> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
da0: 8727MB (17873040 512 byte sectors: 255H 63S/T 1112C)
Start pid=2 <pagedaemon>
Start pid=3 <vmdaemon>
Start pid=4 <syncer>

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