On Thu, 2009-05-21 at 14:51 -0500, James Bottomley wrote: > 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@xxxxxxxxxxxxxxxxxx> > > > 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. I saw the quirk fix for this go by: http://ozlabs.org/pipermail/linuxppc-dev/2009-May/072436.html Is there an easy way to trigger an interrupt on this device? Preferably in ipr_probe_ioa() so we can at least print out if the interrupts are misrouted and fall back from MSI to normal using the PCI infrastructure? James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
