Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * RPA Virtual I/O device functions | |
3 | * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com> | |
4 | * | |
5 | * All rights reserved. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or (at | |
10 | * your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
15 | * NON INFRINGEMENT. See the GNU General Public License for more | |
16 | * details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * Send feedback to <lxie@us.ibm.com> | |
23 | * | |
24 | */ | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/kobject.h> | |
28 | #include <linux/sysfs.h> | |
29 | #include <linux/pci.h> | |
4e57b681 TS |
30 | #include <linux/string.h> |
31 | #include <linux/slab.h> | |
32 | ||
1da177e4 LT |
33 | #include <asm/rtas.h> |
34 | #include "rpaphp.h" | |
35 | ||
1da177e4 LT |
36 | /* free up the memory used by a slot */ |
37 | static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot) | |
38 | { | |
39 | struct slot *slot = (struct slot *) hotplug_slot->private; | |
1da177e4 LT |
40 | dealloc_slot_struct(slot); |
41 | } | |
42 | ||
43 | void dealloc_slot_struct(struct slot *slot) | |
44 | { | |
45 | kfree(slot->hotplug_slot->info); | |
b2132fec | 46 | kfree(slot->name); |
1da177e4 LT |
47 | kfree(slot->hotplug_slot); |
48 | kfree(slot); | |
1da177e4 LT |
49 | } |
50 | ||
5fd39c35 LV |
51 | struct slot *alloc_slot_struct(struct device_node *dn, |
52 | int drc_index, char *drc_name, int power_domain) | |
1da177e4 LT |
53 | { |
54 | struct slot *slot; | |
55 | ||
f5afe806 | 56 | slot = kzalloc(sizeof(struct slot), GFP_KERNEL); |
1da177e4 LT |
57 | if (!slot) |
58 | goto error_nomem; | |
f5afe806 | 59 | slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); |
1da177e4 LT |
60 | if (!slot->hotplug_slot) |
61 | goto error_slot; | |
f5afe806 | 62 | slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), |
1da177e4 LT |
63 | GFP_KERNEL); |
64 | if (!slot->hotplug_slot->info) | |
65 | goto error_hpslot; | |
b2132fec AC |
66 | slot->name = kstrdup(drc_name, GFP_KERNEL); |
67 | if (!slot->name) | |
1da177e4 | 68 | goto error_info; |
1da177e4 LT |
69 | slot->dn = dn; |
70 | slot->index = drc_index; | |
1da177e4 LT |
71 | slot->power_domain = power_domain; |
72 | slot->hotplug_slot->private = slot; | |
73 | slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops; | |
74 | slot->hotplug_slot->release = &rpaphp_release_slot; | |
75 | ||
76 | return (slot); | |
77 | ||
1da177e4 LT |
78 | error_info: |
79 | kfree(slot->hotplug_slot->info); | |
80 | error_hpslot: | |
81 | kfree(slot->hotplug_slot); | |
82 | error_slot: | |
83 | kfree(slot); | |
84 | error_nomem: | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | static int is_registered(struct slot *slot) | |
89 | { | |
5fd39c35 | 90 | struct slot *tmp_slot; |
1da177e4 LT |
91 | |
92 | list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) { | |
93 | if (!strcmp(tmp_slot->name, slot->name)) | |
94 | return 1; | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | ||
f6afbad8 | 99 | int rpaphp_deregister_slot(struct slot *slot) |
1da177e4 LT |
100 | { |
101 | int retval = 0; | |
102 | struct hotplug_slot *php_slot = slot->hotplug_slot; | |
103 | ||
104 | dbg("%s - Entry: deregistering slot=%s\n", | |
66bef8c0 | 105 | __func__, slot->name); |
1da177e4 LT |
106 | |
107 | list_del(&slot->rpaphp_slot_list); | |
108 | ||
1da177e4 LT |
109 | retval = pci_hp_deregister(php_slot); |
110 | if (retval) | |
111 | err("Problem unregistering a slot %s\n", slot->name); | |
1da177e4 | 112 | |
66bef8c0 | 113 | dbg("%s - Exit: rc[%d]\n", __func__, retval); |
1da177e4 LT |
114 | return retval; |
115 | } | |
61ee9cd5 | 116 | EXPORT_SYMBOL_GPL(rpaphp_deregister_slot); |
1da177e4 | 117 | |
f6afbad8 | 118 | int rpaphp_register_slot(struct slot *slot) |
1da177e4 | 119 | { |
f1e79092 | 120 | struct hotplug_slot *php_slot = slot->hotplug_slot; |
1da177e4 | 121 | int retval; |
f46753c5 | 122 | int slotno; |
1da177e4 LT |
123 | |
124 | dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n", | |
66bef8c0 | 125 | __func__, slot->dn->full_name, slot->index, slot->name, |
1da177e4 | 126 | slot->power_domain, slot->type); |
f1e79092 | 127 | |
1da177e4 | 128 | /* should not try to register the same slot twice */ |
f1e79092 | 129 | if (is_registered(slot)) { |
f6afbad8 | 130 | err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name); |
3499f072 | 131 | return -EAGAIN; |
1da177e4 | 132 | } |
f1e79092 | 133 | |
f46753c5 AC |
134 | if (slot->dn->child) |
135 | slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn); | |
136 | else | |
137 | slotno = -1; | |
1359f270 | 138 | retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name); |
1da177e4 LT |
139 | if (retval) { |
140 | err("pci_hp_register failed with error %d\n", retval); | |
3499f072 | 141 | return retval; |
1da177e4 | 142 | } |
1da177e4 | 143 | |
f1e79092 | 144 | /* add slot to our internal list */ |
1da177e4 | 145 | list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head); |
1b7c9fca | 146 | info("Slot [%s] registered\n", slot->name); |
1da177e4 LT |
147 | return 0; |
148 | } | |
149 |