2 * Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c"
4 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
5 * Copyright (C) 2005 International Business Machines
7 * Updates, 2005, John Rose <johnrose@austin.ibm.com>
8 * Updates, 2005, Linas Vepstas <linas@austin.ibm.com>
9 * Updates, 2013, Gavin Shan <shangw@linux.vnet.ibm.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
17 #include <linux/pci.h>
18 #include <linux/export.h>
19 #include <asm/pci-bridge.h>
20 #include <asm/ppc-pci.h>
21 #include <asm/firmware.h>
25 * pcibios_release_device - release PCI device
28 * The function is called before releasing the indicated PCI device.
30 void pcibios_release_device(struct pci_dev *dev)
32 eeh_remove_device(dev, 1);
36 * __pcibios_remove_pci_devices - remove all devices under this bus
37 * @bus: the indicated PCI bus
38 * @purge_pe: destroy the PE on removal of PCI devices
40 * Remove all of the PCI devices under this bus both from the
41 * linux pci device tree, and from the powerpc EEH address cache.
42 * By default, the corresponding PE will be destroied during the
43 * normal PCI hotplug path. For PCI hotplug during EEH recovery,
44 * the corresponding PE won't be destroied and deallocated.
46 void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe)
48 struct pci_dev *dev, *tmp;
49 struct pci_bus *child_bus;
51 /* First go down child busses */
52 list_for_each_entry(child_bus, &bus->children, node)
53 __pcibios_remove_pci_devices(child_bus, purge_pe);
55 pr_debug("PCI: Removing devices on bus %04x:%02x\n",
56 pci_domain_nr(bus), bus->number);
57 list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
58 pr_debug(" * Removing %s...\n", pci_name(dev));
59 eeh_remove_bus_device(dev, purge_pe);
60 pci_stop_and_remove_bus_device(dev);
65 * pcibios_remove_pci_devices - remove all devices under this bus
66 * @bus: the indicated PCI bus
68 * Remove all of the PCI devices under this bus both from the
69 * linux pci device tree, and from the powerpc EEH address cache.
71 void pcibios_remove_pci_devices(struct pci_bus *bus)
73 __pcibios_remove_pci_devices(bus, 1);
75 EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
78 * pcibios_add_pci_devices - adds new pci devices to bus
79 * @bus: the indicated PCI bus
81 * This routine will find and fixup new pci devices under
82 * the indicated bus. This routine presumes that there
83 * might already be some devices under this bridge, so
84 * it carefully tries to add only new devices. (And that
85 * is how this routine differs from other, similar pcibios
88 void pcibios_add_pci_devices(struct pci_bus * bus)
90 int slotno, num, mode, pass, max;
92 struct device_node *dn = pci_bus_to_OF_node(bus);
94 eeh_add_device_tree_early(dn);
96 mode = PCI_PROBE_NORMAL;
97 if (ppc_md.pci_probe_mode)
98 mode = ppc_md.pci_probe_mode(bus);
100 if (mode == PCI_PROBE_DEVTREE) {
101 /* use ofdt-based probe */
102 of_rescan_bus(dn, bus);
103 } else if (mode == PCI_PROBE_NORMAL) {
104 /* use legacy probe */
105 slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
106 num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
109 pcibios_setup_bus_devices(bus);
110 max = bus->busn_res.start;
111 for (pass = 0; pass < 2; pass++) {
112 list_for_each_entry(dev, &bus->devices, bus_list) {
113 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
114 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
115 max = pci_scan_bridge(bus, dev,
120 pcibios_finish_adding_to_bus(bus);
122 EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);