mirror of https://gitee.com/openkylin/linux.git
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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#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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edev->bdfn = (pdn->busno << 8) | pdn->devfn;
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edev->controller = pdn->phb;
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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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