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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-22powerpc/eeh: Add eeh_force_recover to debugfsOliver O'Halloran
This patch adds a debugfs interface to force scheduling a recovery event. This can be used to recover a specific PE or schedule a "special" recovery even that checks for errors at the PHB level. To force a recovery of a normal PE, use: echo '<#pe>:<#phb>' > /sys/kernel/debug/powerpc/eeh_force_recover To force a scan for broken PHBs: echo 'hwcheck' > /sys/kernel/debug/powerpc/eeh_force_recover Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-03-27powerpc/eeh: Manage EEH_PE_RECOVERING inside eeh_handle_normal_event()Sam Bobroff
Currently the EEH_PE_RECOVERING flag for a PE is managed by both the caller and callee of eeh_handle_normal_event() (among other places not considered here). This is complicated by the fact that the PE may or may not have been invalidated by the call. So move the callee's handling into eeh_handle_normal_event(), which clarifies it and allows the return type to be changed to void (because it no longer needs to indicate at the PE has been invalidated). This should not change behaviour except in eeh_event_handler() where it was previously possible to cause eeh_pe_state_clear() to be called on an invalid PE, which is now avoided. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-03-27powerpc/eeh: Remove eeh_handle_event()Sam Bobroff
The function eeh_handle_event(pe) does nothing other than switching between calling eeh_handle_normal_event(pe) and eeh_handle_special_event(). However it is only called in two places, one where pe can't be NULL and the other where it must be NULL (see eeh_event_handler()) so it does nothing but obscure the flow of control. So, remove it. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-06-11powerpc/powernv: Fix killed EEH eventGavin Shan
On PowerNV platform, EEH errors are reported by IO accessors or poller driven by interrupt. After the PE is isolated, we won't produce EEH event for the PE. The current implementation has possibility of EEH event lost in this way: The interrupt handler queues one "special" event, which drives the poller. EEH thread doesn't pick the special event yet. IO accessors kicks in, the frozen PE is marked as "isolated" and EEH event is queued to the list. EEH thread runs because of special event and purge all existing EEH events. However, we never produce an other EEH event for the frozen PE. Eventually, the PE is marked as "isolated" and we don't have EEH event to recover it. The patch fixes the issue to keep EEH events for PEs that have been marked as "isolated" with the help of additional "force" help to eeh_remove_event(). Reported-by: Rolf Brudeseth <rolfb@us.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-06-20powerpc/eeh: Allow to purge EEH eventsGavin Shan
On PowerNV platform, we might run into the situation where subsequent events are duplicated events of former one, which is being processed. For the case, we need the function implemented by the patch to purge EEH events accordingly. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-06-20powerpc/eeh: Single kthread to handle eventsGavin Shan
We possiblly have multiple kthreads running for multiple EEH errors (events) and use one spinlock to make the process of handling those EEH events serialized. That's unnecessary and the patch creates only one kthread, which is started during EEH core initialization time in eeh_init(). A new semaphore introduced to count the number of existing EEH events in the queue and the kthread waiting on the semaphore. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-10powerpc/eeh: Handle EEH error based on PEGavin Shan
The patch reworks the current implementation so that the eeh errors will be handled basing on PE instead of eeh device. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-10powerpc/eeh: Build EEH event based on PEGavin Shan
The original implementation builds EEH event based on EEH device. We already had dedicated struct to depict PE. It's reasonable to build EEH event based on PE. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-03-09powerpc/eeh: Replace pci_dn with eeh_dev for EEH aux componentsGavin Shan
The original EEH implementation is heavily depending on struct pci_dn. We have to put EEH related information to pci_dn. Actually, we could split struct pci_dn so that the EEH sensitive information to form an individual struct, then EEH looks more independent. The patch replaces pci_dn with eeh_dev for EEH aux components like event and driver. Also, the eeh_event struct has been adjusted for a little bit since eeh_dev has linked the associated FDT (Flat Device Tree) node and PCI device. It's not necessary for eeh_event struct to trace FDT node and PCI device. We can just simply to trace eeh_dev in eeh_event. The patch also renames function pcid_name() to eeh_pcid_name(), which should be missed in the previous patch where the EEH aux components have been cleaned up. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-03-09powerpc/pseries: Cleanup comments in EEH aux componentsGavin Shan
There're several EEH aux components and the patch does some cleanup for them so that they look more clean. * Duplicated comments have been removed from the header file. * Comments have been reorganized so that it looks more clean. * The leading comments of functions are adjusted for a little bit so that the result of "make pdfdocs" would be more unified. * Function calls "xxx ()" has been replaced by "xxx()". Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-08-04powerpc: Move include files to arch/powerpc/include/asmStephen Rothwell
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>