Public bug reported: == Comment: #0 - Frederic Barrat <frederic.bar...@fr.ibm.com> - 2020-01-27 10:56:49 == ---Problem Description--- We've added code in firmware to allow to reset an opencapi adapter on a powerpc system, and retrain the opencapi link.
On linux, resetting the opencapi link is re-using the existing PCI hotplug framework, but there's a bit of enablement code missing and we'd like to add it to Ubuntu 20.04 since it's a LTS release. Contact Information = frederic.bar...@fr.ibm.com ---Additional Hardware Info--- opencapi adapter needed ---uname output--- Linux wsp02 5.3.0-26-generic #28-Ubuntu SMP Wed Dec 18 05:34:53 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux Machine Type = all P9 supporting opencapi: mihawk and AC922 (witherspoon) ---Debugger--- A debugger is not configured Stack trace output: no Oops output: no System Dump Info: The system is not configured to capture a system dump. *Additional Instructions for frederic.bar...@fr.ibm.com: -Attach sysctl -a output output to the bug. == Comment: #1 - Frederic Barrat <frederic.bar...@fr.ibm.com> - 2020-01-27 11:00:49 == The linux code in question has been on the mailing list for a while and is expected to be merged in the 5.6 merge window opening today. Here is a link to the patches on the mailing list. I'll post the official commit IDs once they are known. http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=144336 Once merged upstream, is it possible to add them to the 20.04 kernel? Of course, I'll handle the backport if it's needed. == Comment: #3 - Frederic Barrat <frederic.bar...@fr.ibm.com> - 2020-01-30 02:51:05 == The patches have been merged in the powerpc maintainer's 'next' tree and will be in kernel 5.6 and now have official commit IDs: 05dd7da76986 powerpc/powernv/ioda: Fix ref count for devices with their own PE 80f1ff83fa11 powerpc/powernv/ioda: Protect PE list c1a2feade085 powerpc/powernv/ioda: set up PE on opencapi device when enabling f724385fea01 powerpc/powernv/ioda: Release opencapi device bbb789046084 powerpc/powernv/ioda: Find opencapi slot for a device node 658ab186dd22 pci/hotplug/pnv-php: Remove erroneous warning 323c2a26ff43 pci/hotplug/pnv-php: Improve error msg on power state change failure ea53919b15bf pci/hotplug/pnv-php: Register opencapi slots be1611e043de pci/hotplug/pnv-php: Relax check when disabling slot 748ac391ab9a pci/hotplug/pnv-php: Wrap warnings in macro 49ce94b8677c ocxl: Add PCI hotplug dependency to Kconfig They apply cleanly on kernel v5.4 and v5.5, starting from the bottom. They impact powerpc-only code and even more specifically the powernv platform. The PCI hotplug module modifications for powernv are to make the hotplug driver aware of the new opencapi slots. The "ioda" modifications are to manage the state of opencapi devices properly, since they can now be destroyed and recreated when the opencapi link is reset. Could the patches be added to the kernel which will be used for Ubuntu 20.04? Thanks ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-183470 severity-medium targetmilestone-inin2004 ** Tags added: architecture-ppc64le bugnameltc-183470 severity-medium targetmilestone-inin2004 ** Changed in: ubuntu Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1862121 Title: Allow to reset an opencapi adapter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1862121/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
