Commit | Line | Data |
---|---|---|
317f06de GS |
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 | ||
6384d977 GS |
24 | static struct pci_bus *find_bus_among_children(struct pci_bus *bus, |
25 | struct device_node *dn) | |
26 | { | |
27 | struct pci_bus *child = NULL; | |
28 | struct pci_bus *tmp; | |
29 | ||
30 | if (pci_bus_to_OF_node(bus) == dn) | |
31 | return bus; | |
32 | ||
33 | list_for_each_entry(tmp, &bus->children, node) { | |
34 | child = find_bus_among_children(tmp, dn); | |
35 | if (child) | |
36 | break; | |
37 | } | |
38 | ||
39 | return child; | |
40 | } | |
41 | ||
42 | struct pci_bus *pci_find_bus_by_node(struct device_node *dn) | |
43 | { | |
44 | struct pci_dn *pdn = PCI_DN(dn); | |
45 | ||
46 | if (!pdn || !pdn->phb || !pdn->phb->bus) | |
47 | return NULL; | |
48 | ||
49 | return find_bus_among_children(pdn->phb->bus, dn); | |
50 | } | |
51 | EXPORT_SYMBOL_GPL(pci_find_bus_by_node); | |
52 | ||
008a4938 GS |
53 | /** |
54 | * pcibios_release_device - release PCI device | |
55 | * @dev: PCI device | |
56 | * | |
57 | * The function is called before releasing the indicated PCI device. | |
58 | */ | |
59 | void pcibios_release_device(struct pci_dev *dev) | |
60 | { | |
10e79630 MN |
61 | struct pci_controller *phb = pci_bus_to_host(dev->bus); |
62 | ||
807a827d | 63 | eeh_remove_device(dev); |
10e79630 MN |
64 | |
65 | if (phb->controller_ops.release_device) | |
66 | phb->controller_ops.release_device(dev); | |
008a4938 GS |
67 | } |
68 | ||
317f06de | 69 | /** |
bd251b89 | 70 | * pci_hp_remove_devices - remove all devices under this bus |
317f06de | 71 | * @bus: the indicated PCI bus |
317f06de GS |
72 | * |
73 | * Remove all of the PCI devices under this bus both from the | |
74 | * linux pci device tree, and from the powerpc EEH address cache. | |
317f06de | 75 | */ |
bd251b89 | 76 | void pci_hp_remove_devices(struct pci_bus *bus) |
317f06de GS |
77 | { |
78 | struct pci_dev *dev, *tmp; | |
79 | struct pci_bus *child_bus; | |
80 | ||
81 | /* First go down child busses */ | |
82 | list_for_each_entry(child_bus, &bus->children, node) | |
bd251b89 | 83 | pci_hp_remove_devices(child_bus); |
317f06de GS |
84 | |
85 | pr_debug("PCI: Removing devices on bus %04x:%02x\n", | |
86 | pci_domain_nr(bus), bus->number); | |
971427f5 | 87 | list_for_each_entry_safe_reverse(dev, tmp, &bus->devices, bus_list) { |
807a827d | 88 | pr_debug(" Removing %s...\n", pci_name(dev)); |
317f06de GS |
89 | pci_stop_and_remove_bus_device(dev); |
90 | } | |
91 | } | |
bd251b89 | 92 | EXPORT_SYMBOL_GPL(pci_hp_remove_devices); |
317f06de GS |
93 | |
94 | /** | |
bd251b89 | 95 | * pci_hp_add_devices - adds new pci devices to bus |
317f06de GS |
96 | * @bus: the indicated PCI bus |
97 | * | |
98 | * This routine will find and fixup new pci devices under | |
99 | * the indicated bus. This routine presumes that there | |
100 | * might already be some devices under this bridge, so | |
101 | * it carefully tries to add only new devices. (And that | |
102 | * is how this routine differs from other, similar pcibios | |
103 | * routines.) | |
104 | */ | |
bd251b89 | 105 | void pci_hp_add_devices(struct pci_bus *bus) |
317f06de | 106 | { |
ab444ec9 | 107 | int slotno, mode, pass, max; |
317f06de | 108 | struct pci_dev *dev; |
467efc2e | 109 | struct pci_controller *phb; |
317f06de GS |
110 | struct device_node *dn = pci_bus_to_OF_node(bus); |
111 | ||
ff57b454 | 112 | eeh_add_device_tree_early(PCI_DN(dn)); |
317f06de | 113 | |
467efc2e DA |
114 | phb = pci_bus_to_host(bus); |
115 | ||
317f06de | 116 | mode = PCI_PROBE_NORMAL; |
467efc2e DA |
117 | if (phb->controller_ops.probe_mode) |
118 | mode = phb->controller_ops.probe_mode(bus); | |
317f06de GS |
119 | |
120 | if (mode == PCI_PROBE_DEVTREE) { | |
121 | /* use ofdt-based probe */ | |
122 | of_rescan_bus(dn, bus); | |
4a5954ed GS |
123 | } else if (mode == PCI_PROBE_NORMAL && |
124 | dn->child && PCI_DN(dn->child)) { | |
ab444ec9 GS |
125 | /* |
126 | * Use legacy probe. In the partial hotplug case, we | |
127 | * probably have grandchildren devices unplugged. So | |
128 | * we don't check the return value from pci_scan_slot() in | |
129 | * order for fully rescan all the way down to pick them up. | |
130 | * They can have been removed during partial hotplug. | |
131 | */ | |
317f06de | 132 | slotno = PCI_SLOT(PCI_DN(dn->child)->devfn); |
ab444ec9 | 133 | pci_scan_slot(bus, PCI_DEVFN(slotno, 0)); |
317f06de GS |
134 | pcibios_setup_bus_devices(bus); |
135 | max = bus->busn_res.start; | |
136 | for (pass = 0; pass < 2; pass++) { | |
137 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
c888770e | 138 | if (pci_is_bridge(dev)) |
317f06de GS |
139 | max = pci_scan_bridge(bus, dev, |
140 | max, pass); | |
141 | } | |
142 | } | |
143 | } | |
144 | pcibios_finish_adding_to_bus(bus); | |
145 | } | |
bd251b89 | 146 | EXPORT_SYMBOL_GPL(pci_hp_add_devices); |