Commit | Line | Data |
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2bf6a8fa LV |
1 | /* |
2 | * PCI Dynamic LPAR, PCI Hot Plug and PCI EEH recovery code | |
3 | * for RPA-compliant PPC64 platform. | |
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 | * | |
10 | * All rights reserved. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
20 | * NON INFRINGEMENT. See the GNU General Public License for more | |
21 | * details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/pci.h> | |
93087948 | 29 | #include <linux/export.h> |
2bf6a8fa | 30 | #include <asm/pci-bridge.h> |
92eb4602 | 31 | #include <asm/ppc-pci.h> |
e8222502 | 32 | #include <asm/firmware.h> |
c3b9d9ab | 33 | #include <asm/eeh.h> |
2bf6a8fa | 34 | |
38ae9ec4 DA |
35 | #include "pseries.h" |
36 | ||
cad5cef6 | 37 | struct pci_controller *init_phb_dynamic(struct device_node *dn) |
92eb4602 JR |
38 | { |
39 | struct pci_controller *phb; | |
92eb4602 | 40 | |
fd6852c8 BH |
41 | pr_debug("PCI: Initializing new hotplug PHB %s\n", dn->full_name); |
42 | ||
92eb4602 JR |
43 | phb = pcibios_alloc_controller(dn); |
44 | if (!phb) | |
45 | return NULL; | |
4c9d2800 | 46 | rtas_setup_phb(phb); |
92eb4602 | 47 | pci_process_bridge_OF_ranges(phb, dn, 0); |
38ae9ec4 | 48 | phb->controller_ops = pseries_pci_controller_ops; |
92eb4602 | 49 | |
92eb4602 JR |
50 | pci_devs_phb_init_dynamic(phb); |
51 | ||
eb740b5f GS |
52 | /* Create EEH devices for the PHB */ |
53 | eeh_dev_phb_init_dynamic(phb); | |
54 | ||
92eb4602 | 55 | if (dn->child) |
ff57b454 | 56 | eeh_add_device_tree_early(PCI_DN(dn)); |
92eb4602 | 57 | |
b5d937de | 58 | pcibios_scan_phb(phb); |
fd6852c8 | 59 | pcibios_finish_adding_to_bus(phb->bus); |
92eb4602 JR |
60 | |
61 | return phb; | |
62 | } | |
63 | EXPORT_SYMBOL_GPL(init_phb_dynamic); | |
fd6852c8 BH |
64 | |
65 | /* RPA-specific bits for removing PHBs */ | |
66 | int remove_phb_dynamic(struct pci_controller *phb) | |
67 | { | |
68 | struct pci_bus *b = phb->bus; | |
69 | struct resource *res; | |
70 | int rc, i; | |
71 | ||
8354be9c | 72 | pr_debug("PCI: Removing PHB %04x:%02x...\n", |
fd6852c8 BH |
73 | pci_domain_nr(b), b->number); |
74 | ||
75 | /* We cannot to remove a root bus that has children */ | |
76 | if (!(list_empty(&b->children) && list_empty(&b->devices))) | |
77 | return -EBUSY; | |
78 | ||
79 | /* We -know- there aren't any child devices anymore at this stage | |
80 | * and thus, we can safely unmap the IO space as it's not in use | |
81 | */ | |
82 | res = &phb->io_resource; | |
83 | if (res->flags & IORESOURCE_IO) { | |
84 | rc = pcibios_unmap_io_space(b); | |
85 | if (rc) { | |
86 | printk(KERN_ERR "%s: failed to unmap IO on bus %s\n", | |
87 | __func__, b->name); | |
88 | return 1; | |
89 | } | |
90 | } | |
91 | ||
73400565 | 92 | /* Remove the PCI bus and unregister the bridge device from sysfs */ |
fd6852c8 BH |
93 | phb->bus = NULL; |
94 | pci_remove_bus(b); | |
73400565 | 95 | device_unregister(b->bridge); |
fd6852c8 BH |
96 | |
97 | /* Now release the IO resource */ | |
98 | if (res->flags & IORESOURCE_IO) | |
99 | release_resource(res); | |
100 | ||
101 | /* Release memory resources */ | |
102 | for (i = 0; i < 3; ++i) { | |
103 | res = &phb->mem_resources[i]; | |
104 | if (!(res->flags & IORESOURCE_MEM)) | |
105 | continue; | |
106 | release_resource(res); | |
107 | } | |
108 | ||
2dd9c11b MFO |
109 | /* |
110 | * The pci_controller data structure is freed by | |
111 | * the pcibios_free_controller_deferred() callback; | |
112 | * see pseries_root_bridge_prepare(). | |
113 | */ | |
fd6852c8 BH |
114 | |
115 | return 0; | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(remove_phb_dynamic); |