Re: incorrect irqs with pci devices

1999-12-03 Thread Doug Rabson 

On Fri, 3 Dec 1999, Mike Heffner wrote:

 Hi,
 
 I have recently noticed that the irqs for my PCI devices are being screwed up
 somehow. It is easily noticeable with dmesg, the correct one's are in paren.:

Is this an SMP box by any chance? Does the kernel work with the irqs which
it chose?

--
Doug Rabson Mail:  [EMAIL PROTECTED]
Nonlinear Systems Ltd.  Phone: +44 181 442 9037




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Re: incorrect irqs with pci devices

1999-12-03 Thread Mike Heffner 


On 03-Dec-99 Doug Rabson said:
  | On Fri, 3 Dec 1999, Mike Heffner wrote:
  | 
  | Hi,
  | 
  | I have recently noticed that the irqs for my PCI devices are being screwed
  | up
  | somehow. It is easily noticeable with dmesg, the correct one's are in
  | paren.:
  | 
  | Is this an SMP box by any chance? Does the kernel work with the irqs which
  | it chose?
  | 

Yes, it is a SMP box, and yes, the devices work fine. I just thought it was odd
that the kernel would report incorrect ones.

-
Mike Heffner [EMAIL PROTECTED]
Fredericksburg, VA
ICQ# 882073
Date: 03-Dec-99   Time: 09:54:12
-


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Re: incorrect irqs with pci devices

1999-12-03 Thread Garrett Wollman 

On Fri, 03 Dec 1999 09:55:43 -0500 (EST), Mike Heffner [EMAIL PROTECTED] said:

 Yes, it is a SMP box, and yes, the devices work fine. I just thought it was odd
 that the kernel would report incorrect ones.

They are not incorrect.  SMP uses a different interrupt system.

-GAWollman

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Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
[EMAIL PROTECTED]  | O Siem / The fires of freedom 
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MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick


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Re: incorrect irqs with pci devices

1999-12-03 Thread Peter Wemm 

Mike Heffner wrote:
 
 On 03-Dec-99 Doug Rabson said:
   | On Fri, 3 Dec 1999, Mike Heffner wrote:
   | 
   | Hi,
   | 
   | I have recently noticed that the irqs for my PCI devices are being screw
ed
   | up
   | somehow. It is easily noticeable with dmesg, the correct one's are in
   | paren.:
   | 
   | Is this an SMP box by any chance? Does the kernel work with the irqs whic
h
   | it chose?
   | 
 
 Yes, it is a SMP box, and yes, the devices work fine. I just thought it was o
dd
 that the kernel would report incorrect ones.

It isn't "incorrect"..  SMP motherboards have a seperate interrupt
controller (APIC - Advanced programmable interupt controller) that is used
for message passing as well as distributing interrupts per cpu. It also
generally has 24 interrupt pins, and there can be more than one APIC in a
system.  When a system boots, it's in "legacy" mode until the switch is
thrown and it's running in SMP mode.  At that time, the alternative IRQ
assignments are activated.

fxp0: Intel EtherExpress Pro 10/100B Ethernet irq 18 at device 6.0 on pci0
ahc0: Adaptec aic7880 Ultra SCSI adapter irq 17 at device 9.0 on pci0

etc.  Run the mptable(1) program to see your motherboard config.

Cheers,
-Peter



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Re: incorrect irqs with pci devices

1999-12-03 Thread Chris Csanady 

Garrett Wollman wrote:
 
 On Fri, 03 Dec 1999 09:55:43 -0500 (EST), Mike Heffner [EMAIL PROTECTED] said:
 
  Yes, it is a SMP box, and yes, the devices work fine. I just thought it was odd
  that the kernel would report incorrect ones.
 
 They are not incorrect.  SMP uses a different interrupt system.

They are on my box, where incorrect is defined as the interrupts not reaching
their
supposed destination.  I would really like to fix this, but I don't know enough
about exactly what is wrong.  Any ideas would really be appreciated, as I would
like to remove my disgusting hack. :)

I have an AMI raid controller that the system reports that it is on irq 11.  The
problem is that the interrupts actually go to irq 17.  If I hard wire them with

*** pci.c.old   Mon Nov 29 19:34:46 1999
--- pci.c   Thu Dec  2 17:48:42 1999
***
*** 347,352 
--- 347,356 
}
}
}
+   if (cfg-intline == 11) {
+   printf("apic_io: incorrect int 11 - 17\n");
+   cfg-intline = 17;
+   }
  #endif /* APIC_IO */
  
cfg-mingnt = pci_cfgread(cfg, PCIR_MINGNT, 1);

...everything works fine.  I believe the problem has something to do with the
fact that it is a bridged card, but I'm not sure how things should work.

Any thoughts?

Chris


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