// SPDX-License-Identifier: GPL-2.0-or-later/* * The file intends to implement dynamic creation of EEH device, which will * be bound with OF node and PCI device simutaneously. The EEH devices would * be foundamental information for EEH core components to work proerly. Besides, * We have to support multiple situations where dynamic creation of EEH device * is required: * * 1) Before PCI emunation starts, we need create EEH devices according to the *    PCI sensitive OF nodes. * 2) When PCI emunation is done, we need do the binding between PCI device and *    the associated EEH device. * 3) DR (Dynamic Reconfiguration) would create PCI sensitive OF node. EEH device *    will be created while PCI sensitive OF node is detected from DR. * 4) PCI hotplug needs redoing the binding between PCI device and EEH device. If *    PHB is newly inserted, we also need create EEH devices accordingly. * * Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2012. */ #include <linux/export.h>#include <linux/gfp.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/pci.h>#include <linux/string.h> #include <asm/pci-bridge.h>#include <asm/ppc-pci.h> /** * eeh_dev_init - Create EEH device according to OF node * @pdn: PCI device node * * It will create EEH device according to the given OF node. The function * might be called by PCI emunation, DR, PHB hotplug. */struct eeh_dev *eeh_dev_init(struct pci_dn *pdn){	struct eeh_dev *edev; 	/* Allocate EEH device */	edev = kzalloc(sizeof(*edev), GFP_KERNEL);	if (!edev)		return NULL; 	/* Associate EEH device with OF node */	pdn->edev = edev;	edev->pdn = pdn; 	return edev;} /** * eeh_dev_phb_init_dynamic - Create EEH devices for devices included in PHB * @phb: PHB * * Scan the PHB OF node and its child association, then create the * EEH devices accordingly */void eeh_dev_phb_init_dynamic(struct pci_controller *phb){	/* EEH PE for PHB */	eeh_phb_pe_create(phb);}