Re: ipr boot failure caused by MSI (2.6.30-rc1+)

James Bottomley
2009-05-21T19:51:55Z

On Thu, 2009-05-21 at 13:47 -0500, Brian King wrote:
> cc'ing linuxppc-dev...
>
> -Brian
>
>
> James Bottomley wrote:
> > Kernels after 2.6.30-rc1 stopped booting on my powerstation. The ipr
> > just times out and refuses to probe devices. If I let it drop into the
> > initramfs system, this is what the interrupts shows:
> >
> > (initramfs) cat /proc/interrupts
> > CPU0 CPU1 CPU2 CPU3
> > 16: 20 10 13 11 MPIC Level pata_amd
> > 20: 0 0 0 0 MPIC Level ohci_hcd:usb1, ohci_hcd:usb2
> > 21: 0 0 0 0 MPIC-U3MSI Edge ipr
> > 68: 37 37 48 37 MPIC Edge serial
> > 251: 10 71 69 72 MPIC Edge ipi call function
> > 252: 1555 1779 1372 1155 MPIC Edge ipi reschedule
> > 253: 0 0 0 0 MPIC Edge ipi call function single
> > 254: 0 0 0 0 MPIC Edge ipi debugger
> > BAD: 416
> >
> > So you see the IPR is the only device not receiving them.
> >
> > I can fix the boot hang by reverting
> >
> > commit 5a9ef25b14d39b8413364df12cb8d9bb7a673a32
> > Author: Wayne Boyer <wayneb@linux.vnet.ibm.com>
> > Date: Fri Jan 23 09:17:35 2009 -0800
> >
> > [SCSI] ipr: add MSI support
> >
> > The system in question is:
> >
> > SYSTEM INFORMATION
> > Processor = PowerPC,970MP @ 2500 MHz
> > I/O Bridge = U4 (4.4)
> > SMP Size = 4 (#0 #1 #2 #3)
> > Boot-Date = 2009-04-21 17:13:36
> > Memory = 2 GB of RAM @ 666 MHz
> > Board Type = Bimini (7047191/0000000/1)
> > MFG Date = 1608
> > Part No. = 10N8748
> > FRU No. = 10N7182
> > FRU Serial = YL30W8106038
> > UUID = 00000000000000000000000000000000
> > Flashside = 1 (temporary)
> > Version = HEAD
> > Build Date = 12-04-2008 16:13

OK, so as an update, I booted to the initrd and inserted the network
modules, which are also MSI enabled and this is what I get:

(initramfs) cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
16: 14 11 11 18 MPIC Level pata_amd
20: 0 0 0 0 MPIC Level ohci_hcd:usb1, ohci_hcd:usb2
21: 0 0 0 0 MPIC-U3MSI Edge ipr
22: 1 0 1 0 MPIC-U3MSI Edge eth0
23: 0 2 1 0 MPIC-U3MSI Edge eth1
68: 193 166 113 177 MPIC Edge serial
251: 16 65 71 70 MPIC Edge ipi call function
252: 1574 1804 1346 1289 MPIC Edge ipi reschedule
253: 0 0 0 0 MPIC Edge ipi call function single
254: 0 0 0 0 MPIC Edge ipi debugger
BAD: 1866

So clearly the MSI interrupts to the network cards are working and it
looks like just a local problem with the ipr rather than a platform
problem with MSI.

James