On Tuesday, May 17, 2011, Rafael J. Wysocki wrote: > On Tuesday, May 17, 2011, Dwight Schauer wrote: > > On Tue, May 17, 2011 at 10:38 AM, Sarah Sharp > > <sarah.a.sharp@xxxxxxxxxxxxxxx> wrote: > > > On Sun, May 15, 2011 at 12:38:24AM +0200, Rafael J. Wysocki wrote: > > >> On Saturday, May 14, 2011, Dwight Schauer wrote: > > >> > 2011/5/14 Rafael J. Wysocki <rjw@xxxxxxx>: > > >> > > 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. > > >> > ... > > >> > >> > 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 > > >> > > > > >> > > > >> > I'll try that on Monday (the pcie_ports=compat kernel option). > > >> > > > >> > Well, I've got 2 different systems (one Intel and one AMD based, both > > >> > exhibit the same behavior). > > >> > > >> Are both xHCI controllers from NEC? > > >> > > >> > I have a few other systems I can try it on as well on Monday. > > >> > > >> Please do if possible. > > > > > > If pcie_ports=compat doesn't help, does it help if you use pci=nomsi? > > > I'm wondering if the hardware bug shows up only when MSI or MSI-X is > > > enabled for the NEC hardware. Also, if you turn on > > > CONFIG_USB_XHCI_HCD_DEBUGGING, what NEC firmware version do you see in > > > dmesg? > > > > > > Sarah Sharp > > > > > > > pcie_ports=compat had no effect > > with pci_=nomsi I get upon boot. > > > > xhci_hcd 0000:02:00.0: Failed to enable MSI-X > > xhci_hcd 0000:02:00.0: failed to allocate MSI entry > > xhci_hcd 0000:06:00.0: Failed to enable MSI-X > > xhci_hcd 0000:06:00.0: failed to allocate MSI entry > > > > The 6:00.0 is for NEC device in the PCIe slot. > > > > With pci_=nomsi the rutime power management works, I can put auto in > > power/control and the device comes back on it's own. > > > > However, this does not address the wakeup from system suspend issue, > > enabled in power/wakeup still does not work. If the interrupt is now > > being polled, that would make sense as to why it still does not work. > > > > For TI's xHCI device I get "xhci_hcd 0000:02:00.0: failed to allocate > > MSI entry" with pci=nomsi. > > > > The system with TI's device in it is exhibiting the same symptoms > > (wakeup does not work and by default auto in power/control does not > > work). It is a different motherboard and chip-set than the system I > > have the NEC device in. > > > > pci=nomsi has no effect on the system with the TI xHCI device in it. > > pcie_ports=compat had no effect either as far as making auto in > > power/control work properly. > > > > > > As to the NEC firmware, both the on-board and off-board NEC devices > > have the same version: > > > > xhci_hcd 0000:02:00.0: NEC firmware version 30.21 > > xhci_hcd 0000:06:00.0: NEC firmware version 30.21 > > > > Attached are the dmesg boot logs for both systems. > > OK, so for the S3 issue, I think there's a problem with the PCIe link > on these devices such that the link is not present during resume > and that's why commands are not reaching the device. I'm not sure yet > what to do about it, but I wonder if xhci_hcd does something around > PCIe links on suspend? It doesn't seem so. Dwight, can you comment out the pci_disable_device(pci_dev); in drivers/usb/core/hcd-pci.c and see if that makes a difference? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
