On Mon, May 07, 2018 at 06:43:54AM -0700, Matthew Wilcox wrote: > On Mon, May 07, 2018 at 08:30:35AM -0400, Aron Griffis wrote: > > I'm getting this error continuously with an Intel 760p on 4.16.5 (Fedora 28) > > > > pcieport 0000:00:1d.0: AER: Uncorrected (Non-Fatal) error received: id=00e8 > > pcieport 0000:00:1d.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, id=00e8(Requester ID) > > pcieport 0000:00:1d.0: device [8086:a298] error status/mask=00100000/00010000 > > pcieport 0000:00:1d.0: [20] Unsupported Request (First) > > pcieport 0000:00:1d.0: TLP Header: 34000000 70000010 00000000 88468846 > > pcieport 0000:00:1d.0: broadcast error_detected message > > pcieport 0000:00:1d.0: broadcast mmio_enabled message > > pcieport 0000:00:1d.0: broadcast resume message > > pcieport 0000:00:1d.0: AER: Device recovery successful > > > > Willy graciously decoded this for me to a "Latency Tolerance Reporting > > Message," and suggested I send email to this list to check whether it's a > > problem with the device or driver. > > Decoding this further, the Requester ID is 70:00.0 (ie the NVMe device is > sending the LTR message) so the Root Port is the one saying "Unsupported > Request". Which is fair enough, because ... > > > 00:1d.0 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #9 (rev f0) (prog-if 00 [Normal decode]) > > Bus: primary=00, secondary=70, subordinate=70, sec-latency=0 > > DevCap2: Completion Timeout: Range ABC, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd+ > > AtomicOpsCap: Routing- 32bit- 64bit- 128bitCAS- > > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd- > > AtomicOpsCtl: ReqEn- EgressBlck- > > the Root Port doesn't know what LTR is. > > > 70:00.0 Non-Volatile memory controller: Intel Corporation Device f1a6 (rev 03) (prog-if 02 [NVM Express]) > > Capabilities: [70] Express (v2) Endpoint, MSI 00 > > DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+, OBFF Not Supported > > AtomicOpsCap: 32bit- 64bit- 128bitCAS- > > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled > > AtomicOpsCtl: ReqEn- > > The device *does* know what LTR is, but it's supposed to be disabled. > > Is there more recent firmware for this device? Hi Willy, Thank you for the detailed analysis. :) I'm not familiar with this device, but I'll check internally to see if this a later firmware release address this. Aron, Could you let me know the firmware revision you're currently running? Thanks, Keith
