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1 | /* | |
2 | * Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c" | |
3 | * | |
4 | * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com> | |
5 | * Copyright (C) 2005 International Business Machines | |
6 | * | |
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> | |
10 | * | |
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. | |
15 | */ | |
16 | ||
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> | |
22 | #include <asm/eeh.h> | |
23 | ||
24 | /** | |
25 | * pcibios_release_device - release PCI device | |
26 | * @dev: PCI device | |
27 | * | |
28 | * The function is called before releasing the indicated PCI device. | |
29 | */ | |
30 | void pcibios_release_device(struct pci_dev *dev) | |
31 | { | |
32 | eeh_remove_device(dev); | |
33 | } | |
34 | ||
35 | /** | |
36 | * pcibios_remove_pci_devices - remove all devices under this bus | |
37 | * @bus: the indicated PCI bus | |
38 | * | |
39 | * Remove all of the PCI devices under this bus both from the | |
40 | * linux pci device tree, and from the powerpc EEH address cache. | |
41 | */ | |
42 | void pcibios_remove_pci_devices(struct pci_bus *bus) | |
43 | { | |
44 | struct pci_dev *dev, *tmp; | |
45 | struct pci_bus *child_bus; | |
46 | ||
47 | /* First go down child busses */ | |
48 | list_for_each_entry(child_bus, &bus->children, node) | |
49 | pcibios_remove_pci_devices(child_bus); | |
50 | ||
51 | pr_debug("PCI: Removing devices on bus %04x:%02x\n", | |
52 | pci_domain_nr(bus), bus->number); | |
53 | list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) { | |
54 | pr_debug(" Removing %s...\n", pci_name(dev)); | |
55 | pci_stop_and_remove_bus_device(dev); | |
56 | } | |
57 | } | |
58 | ||
59 | EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices); | |
60 | ||
61 | /** | |
62 | * pcibios_add_pci_devices - adds new pci devices to bus | |
63 | * @bus: the indicated PCI bus | |
64 | * | |
65 | * This routine will find and fixup new pci devices under | |
66 | * the indicated bus. This routine presumes that there | |
67 | * might already be some devices under this bridge, so | |
68 | * it carefully tries to add only new devices. (And that | |
69 | * is how this routine differs from other, similar pcibios | |
70 | * routines.) | |
71 | */ | |
72 | void pcibios_add_pci_devices(struct pci_bus * bus) | |
73 | { | |
74 | int slotno, mode, pass, max; | |
75 | struct pci_dev *dev; | |
76 | struct device_node *dn = pci_bus_to_OF_node(bus); | |
77 | ||
78 | eeh_add_device_tree_early(PCI_DN(dn)); | |
79 | ||
80 | mode = PCI_PROBE_NORMAL; | |
81 | if (ppc_md.pci_probe_mode) | |
82 | mode = ppc_md.pci_probe_mode(bus); | |
83 | ||
84 | if (mode == PCI_PROBE_DEVTREE) { | |
85 | /* use ofdt-based probe */ | |
86 | of_rescan_bus(dn, bus); | |
87 | } else if (mode == PCI_PROBE_NORMAL) { | |
88 | /* | |
89 | * Use legacy probe. In the partial hotplug case, we | |
90 | * probably have grandchildren devices unplugged. So | |
91 | * we don't check the return value from pci_scan_slot() in | |
92 | * order for fully rescan all the way down to pick them up. | |
93 | * They can have been removed during partial hotplug. | |
94 | */ | |
95 | slotno = PCI_SLOT(PCI_DN(dn->child)->devfn); | |
96 | pci_scan_slot(bus, PCI_DEVFN(slotno, 0)); | |
97 | pcibios_setup_bus_devices(bus); | |
98 | max = bus->busn_res.start; | |
99 | for (pass = 0; pass < 2; pass++) { | |
100 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
101 | if (pci_is_bridge(dev)) | |
102 | max = pci_scan_bridge(bus, dev, | |
103 | max, pass); | |
104 | } | |
105 | } | |
106 | } | |
107 | pcibios_finish_adding_to_bus(bus); | |
108 | } | |
109 | EXPORT_SYMBOL_GPL(pcibios_add_pci_devices); |