App correlating PCI info with SCSI host number

App correlating PCI info with SCSI host number

[Stephen Cameron]

I know on 2.6, I seem to be able to do 
something like this to correlate PCI 
(domain)/bus/dev/func with the linux 
assigned scsi host number.

myhost:/sys/bus/scsi/devices # find /sys/devices -name 'host[0-9]*' -print
/sys/devices/pci0000:64/0000:64:01.1/host15
/sys/devices/pci0000:64/0000:64:01.0/host14
/sys/devices/pci0000:62/0000:62:01.1/host11
/sys/devices/pci0000:62/0000:62:01.0/host10
/sys/devices/pci0000:60/0000:60:03.1/host9
/sys/devices/pci0000:60/0000:60:03.0/host8
/sys/devices/pci0000:60/0000:60:02.1/host7
/sys/devices/pci0000:60/0000:60:02.0/host6
/sys/devices/pci0000:38/0000:38:01.1/host5
/sys/devices/pci0000:38/0000:38:01.0/host4
/sys/devices/pci0000:34/0000:34:01.1/host13
/sys/devices/pci0000:34/0000:34:01.0/host12
/sys/devices/pci0000:20/0000:20:03.1/host3
/sys/devices/pci0000:20/0000:20:03.0/host2
/sys/devices/pci0000:20/0000:20:02.1/host1
/sys/devices/pci0000:20/0000:20:02.0/host0

Is there any generic way to make the same sort
of correlation on 2.4 kernels?

I know I can do, for instance, 

myhost:/sys/bus/scsi/devices # cat /proc/scsi/sym53c8xx/0
Chip sym53c1010-66, device id 0x21, revision id 0x1
At PCI address 0000:20:02.0, IRQ 50
Min. period factor 9, Wide SCSI BUS, DT capable
Max. started commands 448, max. commands per LUN 64

And so correlate scsi host 0 with "PCI address 0000:20:02.0"
However, that is of course different from driver to driver,
(on many the PCI info is not apparently available)
and even from version to version of the same driver, e.g:
here's a different version:

[root@myotherhost sym53c8xx]# cat /proc/scsi/sym53c8xx/0
General information:
  Chip sym53c1010-66, device id 0x21, revision id 0x1
  On PCI bus 33, device 1, function 0, IRQ 52
  Synchronous period factor 9, max commands per lun 32

So, is there any way that's not so hit-or-miss?

Thanks,

-- steve





		
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Re: App correlating PCI info with SCSI host number

[Matt Domsch]

On Thu, Jan 27, 2005 at 06:12:51AM -0800, Stephen Cameron wrote:
> 
> I know on 2.6, I seem to be able to do 
> something like this to correlate PCI 
> (domain)/bus/dev/func with the linux 
> assigned scsi host number.
> 
> myhost:/sys/bus/scsi/devices # find /sys/devices -name 'host[0-9]*' -print
> /sys/devices/pci0000:64/0000:64:01.1/host15
> /sys/devices/pci0000:64/0000:64:01.0/host14
> /sys/devices/pci0000:62/0000:62:01.1/host11
> /sys/devices/pci0000:62/0000:62:01.0/host10
> /sys/devices/pci0000:60/0000:60:03.1/host9
> /sys/devices/pci0000:60/0000:60:03.0/host8
> /sys/devices/pci0000:60/0000:60:02.1/host7
> /sys/devices/pci0000:60/0000:60:02.0/host6
> /sys/devices/pci0000:38/0000:38:01.1/host5
> /sys/devices/pci0000:38/0000:38:01.0/host4
> /sys/devices/pci0000:34/0000:34:01.1/host13
> /sys/devices/pci0000:34/0000:34:01.0/host12
> /sys/devices/pci0000:20/0000:20:03.1/host3
> /sys/devices/pci0000:20/0000:20:03.0/host2
> /sys/devices/pci0000:20/0000:20:02.1/host1
> /sys/devices/pci0000:20/0000:20:02.0/host0
> 
> Is there any generic way to make the same sort
> of correlation on 2.4 kernels?

There's an ioctl() to a disk, SCSI_IOCTL_GET_PCI, so if the controller
has a disk attached, you can get it.

-- 
Matt Domsch
Software Architect
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

Re: App correlating PCI info with SCSI host number

[Stephen Cameron]

--- Matt Domsch <Matt_Domsch@dell.com> wrote:
> > Is there any generic way to make the same sort
> > of correlation on 2.4 kernels?
> 
> There's an ioctl() to a disk, SCSI_IOCTL_GET_PCI, so if the controller
> has a disk attached, you can get it.

Ok, thanks, this, in conjunction with SCSI_IOCTL_GET_BUS_NUMBER
seems to do what I want to do.



		
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