On Saturday, May 14, 2011, Dwight Schauer wrote: > On Fri, May 13, 2011 at 3:37 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > On Friday, May 13, 2011, Dwight Schauer wrote: > >> On Fri, May 13, 2011 at 3:04 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > >> > On Friday, May 13, 2011, Dwight Schauer wrote: > >> >> On Thu, May 12, 2011 at 5:29 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > >> >> > On Thursday, May 12, 2011, Rafael J. Wysocki wrote: > >> >> >> On Thursday, May 12, 2011, Alan Stern wrote: > >> >> >> > For new readers: The problem is that an xHCI USB host controller does > >> >> >> > not wake up a suspended system properly. > >> >> >> > > >> >> >> > On Thu, 12 May 2011, Dwight Schauer wrote: > >> >> >> > > >> >> >> > > Thanks Alan. > >> >> >> > > > >> >> >> > > OK, this is with 2.6.39-rc7-gregkh > >> >> >> > > > >> >> >> > > 05:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host > >> >> >> > > Controller (rev 03) (prog-if 30 [XHCI]) > >> >> >> > > Subsystem: Melco Inc Device 0241 > >> >> >> > > Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- > >> >> >> > > ParErr- Stepping- SERR+ FastB2B- DisINTx+ > >> >> >> > > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- > >> >> >> > > <TAbort- <MAbort- >SERR- <PERR- INTx- > >> >> >> > > Interrupt: pin A routed to IRQ 17 > >> >> >> > > Region 0: Memory at fe9fe000 (64-bit, non-prefetchable) [size=8K] > >> >> >> > > Capabilities: [50] Power Management version 3 > >> >> >> > > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA > >> >> >> > > PME(D0+,D1-,D2-,D3hot+,D3cold-) > >> >> >> > > Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+ > >> >> >> > > >> >> >> > That's the important part for power management and wakeup. The > >> >> >> > controller does support PCI wakeup. In fact, at the time you ran lspci > >> >> >> > the controller _was_ suspended and it was signalling a wakeup request! > >> >> >> > Obviously something is wrong somewhere... > >> >> >> > > >> >> >> > > @@@ With "on" in power/control I get this upon plugging in a keyboard: > >> >> >> > ... > >> >> >> > > @@@ and upon removing it: > >> >> >> > > >> >> >> > All normal. > >> >> >> > > >> >> >> > > @@@ If I put "auto" in power/control I get this: > >> >> >> > > > >> >> >> > > xhci_hcd 0000:05:00.0: hcd_pci_runtime_suspend: 0 > >> >> >> > > xhci_hcd 0000:05:00.0: PME# enabled > >> >> >> > > >> >> >> > This means the controller was suspended with wakeup enabled, as it > >> >> >> > should be. > >> >> >> > > >> >> >> > > @@@ Upon plugging in a keyboard nothing. > >> >> >> > > >> >> >> > Indeed, that is a problem. Since wakeup doesn't work right at runtime, > >> >> >> > it's not surprising that it also fails during system sleep. > >> >> >> > > >> >> .... > >> >> >> > > >> >> >> > Clearly something is wrong. But it looks like the problem might be > >> >> >> > somewhere else, not in the xHCI driver. Is your BIOS up to date? > >> >> >> > > >> >> >> > CC-ing the linux-pm mailing list in case anybody there has some ideas. > >> >> >> > >> >> >> I need a boot log from 2.6.39-rc6 (or current Linus') on the affected system. > >> >> > > >> >> > That should have been -rc7, sorry. > >> >> > > >> >> > Thanks, > >> >> > Rafael > >> >> > >> >> Rafael, > >> >> > >> >> I updated the BIOS, but the results are the same. > >> > > >> > I'm not really sure if that matters. > >> > > >> > Thanks for the boot log. > >> > > >> > Please send the contents of /proc/interrupts before and after you've tried > >> > to resume the xHCI controller. > >> > > ... > >> > >> @@@ plug keyboard back in > >> > >> cat /proc/interrupts > >> CPU0 CPU1 CPU2 CPU3 > >> 0: 160 2 444 122646 IO-APIC-edge timer > >> 1: 0 0 1 7 IO-APIC-edge i8042 > >> 4: 0 0 0 2 IO-APIC-edge > >> 8: 0 0 1 112 IO-APIC-edge rtc0 > >> 9: 0 0 0 2 IO-APIC-fasteoi acpi > >> 16: 0 0 0 439 IO-APIC-fasteoi hda_intel > >> 17: 0 0 0 4 IO-APIC-fasteoi > >> ehci_hcd:usb1, ehci_hcd:usb3, ehci_hcd:usb6 > >> 18: 0 0 4 669 IO-APIC-fasteoi > >> ahci, ohci_hcd:usb8, ohci_hcd:usb9, ohci_hcd:usb10, ohci_hcd:usb11, > >> radeon > >> 19: 0 1 385 25596 IO-APIC-fasteoi > >> pata_jmicron, hda_intel > >> 40: 0 0 0 0 PCI-MSI-edge PCIe PME > >> 41: 0 0 0 0 PCI-MSI-edge PCIe PME > >> 42: 0 0 0 0 PCI-MSI-edge PCIe PME > >> 43: 0 0 0 0 PCI-MSI-edge PCIe PME > >> 44: 0 0 0 1 PCI-MSI-edge xhci_hcd > >> 45: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 46: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 47: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 48: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 49: 0 0 1 93 PCI-MSI-edge xhci_hcd > >> 50: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 51: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 52: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 53: 0 0 0 0 PCI-MSI-edge xhci_hcd > >> 54: 0 0 53 10289 PCI-MSI-edge ahci > >> 55: 0 0 266 71934 PCI-MSI-edge eth0 > >> NMI: 0 0 0 0 Non-maskable interrupts > >> LOC: 25130 27508 14608 1864 Local timer interrupts > >> SPU: 0 0 0 0 Spurious interrupts > >> PMI: 0 0 0 0 Performance > >> monitoring interrupts > >> IWI: 0 0 0 0 IRQ work interrupts > >> RES: 15335 8131 5912 13899 Rescheduling interrupts > >> CAL: 95 138 135 60 Function call interrupts > >> TLB: 225 475 475 194 TLB shootdowns > >> TRM: 0 0 0 0 Thermal event interrupts > >> THR: 0 0 0 0 Threshold APIC interrupts > >> MCE: 0 0 0 0 Machine check exceptions > >> MCP: 18 18 18 18 Machine check polls > >> ERR: 0 > >> MIS: 0 > > > > So, clearly, you don't get any PCIe PME interrupts from root ports > > when the keyboard is plugged in. Without those interrupts the runtime > > resume of xhci won't work. > > > > Please attach the output of "lspci -vv" with "auto" in the (suspended) xhci's > > power/control file before and after you've plugged in the keyboard. > > > > Thanks, > > Rafael > > The lspci -vv before, after, and diff are attached. This means that the PME signaled by the xHCI doesn't cause the PMEStatus bit in its root port to be set, which is why the root port doesn't generate interrupts. This seriously looks like a hardware bug and the only thing we could do to work around it would be to poll the xHCI for the PME status periodically (while suspended). Can you see if the feature works after booting with pcie_ports=compat in the kernel command line? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
