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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3e77adeea3
Otherwise we end up not yet having computed the right diag data size
on powernv where EEH initialization is delayed, thus causing memory
corruption later on when calling OPAL.
Fixes: 5cb1f8fddd ("powerpc/powernv/pci: Dynamically allocate PHB diag data")
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/*
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* The file intends to implement dynamic creation of EEH device, which will
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* be bound with OF node and PCI device simutaneously. The EEH devices would
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* be foundamental information for EEH core components to work proerly. Besides,
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* We have to support multiple situations where dynamic creation of EEH device
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* is required:
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*
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* 1) Before PCI emunation starts, we need create EEH devices according to the
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* PCI sensitive OF nodes.
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* 2) When PCI emunation is done, we need do the binding between PCI device and
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* the associated EEH device.
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* 3) DR (Dynamic Reconfiguration) would create PCI sensitive OF node. EEH device
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* will be created while PCI sensitive OF node is detected from DR.
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* 4) PCI hotplug needs redoing the binding between PCI device and EEH device. If
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* PHB is newly inserted, we also need create EEH devices accordingly.
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*
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* Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2012.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/export.h>
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#include <linux/gfp.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/string.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc-pci.h>
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/**
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* eeh_dev_init - Create EEH device according to OF node
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* @pdn: PCI device node
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*
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* It will create EEH device according to the given OF node. The function
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* might be called by PCI emunation, DR, PHB hotplug.
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*/
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struct eeh_dev *eeh_dev_init(struct pci_dn *pdn)
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{
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struct eeh_dev *edev;
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/* Allocate EEH device */
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edev = kzalloc(sizeof(*edev), GFP_KERNEL);
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if (!edev)
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return NULL;
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/* Associate EEH device with OF node */
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pdn->edev = edev;
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edev->pdn = pdn;
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INIT_LIST_HEAD(&edev->list);
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INIT_LIST_HEAD(&edev->rmv_list);
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return edev;
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}
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/**
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* eeh_dev_phb_init_dynamic - Create EEH devices for devices included in PHB
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* @phb: PHB
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*
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* Scan the PHB OF node and its child association, then create the
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* EEH devices accordingly
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*/
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void eeh_dev_phb_init_dynamic(struct pci_controller *phb)
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{
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/* EEH PE for PHB */
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eeh_phb_pe_create(phb);
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}
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