/* * 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. * * 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 */ #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 * @dn: device node * @data: PHB * * It will create EEH device according to the given OF node. The function * might be called by PCI emunation, DR, PHB hotplug. */void *eeh_dev_init(struct device_node *dn, void *data){	struct pci_controller *phb = data;	struct eeh_dev *edev; 	/* Allocate EEH device */	edev = kzalloc(sizeof(*edev), GFP_KERNEL);	if (!edev) {		pr_warn("%s: out of memory\n",			__func__);		return NULL;	} 	/* Associate EEH device with OF node */	PCI_DN(dn)->edev = edev;	edev->dn  = dn;	edev->phb = phb;	INIT_LIST_HEAD(&edev->list); 	return NULL;} /** * 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){	struct device_node *dn = phb->dn; 	/* EEH PE for PHB */	eeh_phb_pe_create(phb); 	/* EEH device for PHB */	eeh_dev_init(dn, phb); 	/* EEH devices for children OF nodes */	traverse_pci_devices(dn, eeh_dev_init, phb);} /** * eeh_dev_phb_init - Create EEH devices for devices included in existing PHBs * * Scan all the existing PHBs and create EEH devices for their OF * nodes and their children OF nodes */static int __init eeh_dev_phb_init(void){	struct pci_controller *phb, *tmp; 	list_for_each_entry_safe(phb, tmp, &hose_list, list_node)		eeh_dev_phb_init_dynamic(phb); 	pr_info("EEH: devices created\n"); 	return 0;} core_initcall(eeh_dev_phb_init);