aic7xxx and Promise UDMA conflict

[Mr. Arlington Hewes]

Folks,

I have a dual PIII (GigaByte GA6BXDS)loaded up with 2 Promise Ultra-66 PCI
cards and onboard Adaptec AIC-7895U scsi controller. Whilst my drives run off
the Promise cards, I'm trying to get a nice HP DDS4 DAT drive flying on the
scsi bus for backup.

The problem arises when I try to insmod the aic7xxx driver:

(scsi0) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 12/0
(scsi0) Wide Channel A, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 374 instructions downloaded
(scsi1) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 12/1
(scsi1) Wide Channel B, SCSI ID=7, 32/255 SCBs
(scsi1) Downloading sequencer code... 374 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.20/3.2.4
       <Adaptec AIC-7895 Ultra SCSI host adapter>
scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.20/3.2.4
       <Adaptec AIC-7895 Ultra SCSI host adapter>
scsi : 2 hosts.
scsi : aborting command due to timeout : pid 0, scsi0, channel 0, id 0, lun 0 Test Unit Ready 00 00 00 00 00 
scsi : aborting command due to timeout : pid 0, scsi0, channel 0, id 0, lun 0 Test Unit Ready 00 00 00 00 00 

This is with no devices attached to the onboard SCSI, and termination on. This 
should "just work", no?

Now, as far as I can see, I definitely have a resource conflict . . . 

[root at osmin /root]# cat /proc/interrupts 
           CPU0       CPU1       
  0:      27280      24884    IO-APIC-edge  timer
  1:        189        142    IO-APIC-edge  keyboard
  2:          0          0          XT-PIC  cascade
  8:          0          1    IO-APIC-edge  rtc
 13:          1          0          XT-PIC  fpu
 14:       1262       1244    IO-APIC-edge  ide0
 16:          6          8   IO-APIC-level  ide2, ide3, aic7xxx, aic7xxx
 17:          7          7   IO-APIC-level  ide4, ide5
 18:        474        436   IO-APIC-level  Intel EtherExpress Pro 10/100 Ethernet
 19:        278        221   IO-APIC-level  Intel EtherExpress Pro 10/100 Ethernet
NMI:          0
ERR:          0

Spot the Promise card and the Adaptec fighting for 16?? What's up with that? 
Could this be the source of my troubles? This is what /proc/pci has to say 
about our friends:

  Bus  0, device   8, function  0:
    Unknown mass storage controller: Promise Technology IDE UltraDMA/66 (rev 1).      Medium devsel.  IRQ 16.  Master Capable.  Latency=64.  
      I/O at 0xb400 [0xb401].
      I/O at 0xb800 [0xb801].
      I/O at 0xbc00 [0xbc01].
      I/O at 0xc000 [0xc001].
      I/O at 0xc400 [0xc401].
      Non-prefetchable 32 bit memory at 0xec200000 [0xec200000].

  Bus  0, device   9, function  0:
    Unknown mass storage controller: Promise Technology IDE UltraDMA/66 (rev 1).      Medium devsel.  IRQ 17.  Master Capable.  Latency=64.  
      I/O at 0xc800 [0xc801].
      I/O at 0xcc00 [0xcc01].
      I/O at 0xd000 [0xd001].
      I/O at 0xd400 [0xd401].
      I/O at 0xd800 [0xd801].
      Non-prefetchable 32 bit memory at 0xec220000 [0xec220000].
  Bus  0, device  10, function  0:

    SCSI storage controller: Adaptec AIC-7895U (rev 4).
      Medium devsel.  Fast back-to-back capable.  IRQ 16.  Master Capable.  Latency=64.  Min Gnt=8.Max Lat=8.
      I/O at 0xe400 [0xe401].
      Non-prefetchable 32 bit memory at 0xec241000 [0xec241000].

Can anyone advise how I might convince my onboard SCSI to play nicely with the
rest of the children?

-Darren

-- 
Mr. Arlington Hewes           (tpcadmin at info.tpc.int)
The TPC.INT Subdomain          (http://www.tpc.int/)

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