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[Launchpad Bug Tracker <1665436@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package pciutils - 1:3.3.1-1.1ubuntu4.1

---------------
pciutils (1:3.3.1-1.1ubuntu4.1) yakkety; urgency=medium

  * debian/patches/lspci-Support-GEN4-speed-16GT-s.patch: Cherry-pick from
    upstream to support PCI gen4 cards in lspci.  Closes LP: #1665436.

 -- Steve Langasek <steve.langasek@xxxxxxxxxx>  Thu, 16 Feb 2017
14:22:34 -0800

** Changed in: pciutils (Ubuntu Yakkety)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1665436

Title:
  lspci tool needs to be updated to support pci gen4 cards

Status in pciutils package in Ubuntu:
  Fix Released
Status in pciutils source package in Xenial:
  Fix Released
Status in pciutils source package in Yakkety:
  Fix Released

Bug description:
  [SRU Justification]
  hardware enablement for next-gen hardware in a common hardware utility.

  [Test case]
  1. On a system with a Mellanox CX5 card, run: lspci -vv -s 0001:01:00.2 | grep Speed
  2. Verify that the output shows 'Speed unknown'.
  3. Install pciutils from -proposed.
  4. Run 'lspci -vv -s 0001:01:00.2 | grep Speed' again.
  5. Verify that the output shows 'Speed 16GT/s'.

  [Regression potential]
  Minimal, and none on systems without the new hardware; this is a code change to trivially extend switch/case statements with a new value.

  ---Problem Description---
  This bugzilla is for tracking that the pciutils tool needs to be updated to support pci gen4 cards. Mellanox CX5 card is a pci gen4 card and when I do the following commands I get error. I do not see these errors with Mellanox CX4 which is pci gen3 card.
  In a system, with Mellanox CX4 and CX5 IB with SRIOV:
  lspci | grep Mell
  0001:01:00.0 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
  0001:01:00.1 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
  0001:01:00.2 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Virtual Function]
  0002:01:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
  0002:01:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
  0002:01:00.2 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
  If I do this command with CX4 is ok
  virsh nodedev-detach pci_0002_01_00_2
  Device pci_0002_01_00_2 detached
  but if I do this with CX5 it fails:
  virsh nodedev-detach pci_0001_01_00_2
  error: Failed to detach device pci_0001_01_00_2
  error: malformed 'speed' attribute: (null)

  This is what I see with CX5:
  lspci -vv -s 0001:01:00.2 | grep Speed
  LnkCap: Port #0, Speed unknown, Width x16, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited
  LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-

  and this is what I see for CX4
  lspci -vv -s 0002:01:00.2 | grep Speed
  LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited
  LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-

  ---Additional Hardware Info---
  using Mellanox CX5 card that is pci gen4
   lspci -vv -s 0001:01:00.0 | grep Speed
                  LnkCap: Port #0, Speed unknown, Width x16, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited
                  LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                  LnkCtl2: Target Link Speed: Unknown, EnterCompliance- SpeedDis-

  Machine Type = P8

  ---Steps to Reproduce---
   just plug a pci gen4 card to the system and do this command
  lspci -vv -s 0001:01:00.0 | grep Speed
                  LnkCap: Port #0, Speed unknown, Width x16, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited
                  LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                  LnkCtl2: Target Link Speed: Unknown, EnterCompliance- SpeedDis-
  Will see the speed unknown.

  Userspace tool common name: pciutils

  The patch is already in the pci utils tree:
  commit 9628600bbbeffc4ec6dc48943ee091a5d3eca18b
  Author: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
  Date:   Wed Feb 15 10:53:45 2017 +1100

      lspci: Support GEN4 speed (16GT/s)

      This enables "lspci" to show GEN4 speed (16GT/s) properly according
      to the contents in register PCI_EXP_LNKCAP, PCI_EXP_LNKSTA and
      PCI_EXP_LNKCTL2.

  IBM is asking for the patch to go into 17.04 as well s 16.04.3.

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