/* * Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c" * * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com> * Copyright (C) 2005 International Business Machines * * Updates, 2005, John Rose <johnrose@austin.ibm.com> * Updates, 2005, Linas Vepstas <linas@austin.ibm.com> * Updates, 2013, Gavin Shan <shangw@linux.vnet.ibm.com> * * 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. */ #include <linux/pci.h>#include <linux/export.h>#include <asm/pci-bridge.h>#include <asm/ppc-pci.h>#include <asm/firmware.h>#include <asm/eeh.h> /** * pcibios_release_device - release PCI device * @dev: PCI device * * The function is called before releasing the indicated PCI device. */void pcibios_release_device(struct pci_dev *dev){	eeh_remove_device(dev);} /** * pcibios_remove_pci_devices - remove all devices under this bus * @bus: the indicated PCI bus * * Remove all of the PCI devices under this bus both from the * linux pci device tree, and from the powerpc EEH address cache. */void pcibios_remove_pci_devices(struct pci_bus *bus){	struct pci_dev *dev, *tmp;	struct pci_bus *child_bus; 	/* First go down child busses */	list_for_each_entry(child_bus, &bus->children, node)		pcibios_remove_pci_devices(child_bus); 	pr_debug("PCI: Removing devices on bus %04x:%02x\n",		 pci_domain_nr(bus),  bus->number);	list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {		pr_debug("   Removing %s...\n", pci_name(dev));		pci_stop_and_remove_bus_device(dev);	}} EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices); /** * pcibios_add_pci_devices - adds new pci devices to bus * @bus: the indicated PCI bus * * This routine will find and fixup new pci devices under * the indicated bus. This routine presumes that there * might already be some devices under this bridge, so * it carefully tries to add only new devices.  (And that * is how this routine differs from other, similar pcibios * routines.) */void pcibios_add_pci_devices(struct pci_bus * bus){	int slotno, mode, pass, max;	struct pci_dev *dev;	struct device_node *dn = pci_bus_to_OF_node(bus); 	eeh_add_device_tree_early(dn); 	mode = PCI_PROBE_NORMAL;	if (ppc_md.pci_probe_mode)		mode = ppc_md.pci_probe_mode(bus); 	if (mode == PCI_PROBE_DEVTREE) {		/* use ofdt-based probe */		of_rescan_bus(dn, bus);	} else if (mode == PCI_PROBE_NORMAL) {		/*		 * Use legacy probe. In the partial hotplug case, we		 * probably have grandchildren devices unplugged. So		 * we don't check the return value from pci_scan_slot() in		 * order for fully rescan all the way down to pick them up.		 * They can have been removed during partial hotplug.		 */		slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);		pci_scan_slot(bus, PCI_DEVFN(slotno, 0));		pcibios_setup_bus_devices(bus);		max = bus->busn_res.start;		for (pass = 0; pass < 2; pass++) {			list_for_each_entry(dev, &bus->devices, bus_list) {				if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||				    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)					max = pci_scan_bridge(bus, dev,							      max, pass);			}		}	}	pcibios_finish_adding_to_bus(bus);}EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);