blob: b283bbea6d24ad4132844694ae68351ff920e28f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/sysfs.h>
28#include <linux/pci.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080029#include <linux/string.h>
30#include <linux/slab.h>
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/rtas.h>
33#include "rpaphp.h"
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035/* free up the memory used by a slot */
36static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
37{
38 struct slot *slot = (struct slot *) hotplug_slot->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 dealloc_slot_struct(slot);
40}
41
42void dealloc_slot_struct(struct slot *slot)
43{
44 kfree(slot->hotplug_slot->info);
Alex Chiangb2132fe2008-10-20 17:41:43 -060045 kfree(slot->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 kfree(slot->hotplug_slot);
47 kfree(slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
Linas Vepstas5fd39c32007-04-13 15:34:10 -070050struct slot *alloc_slot_struct(struct device_node *dn,
51 int drc_index, char *drc_name, int power_domain)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
53 struct slot *slot;
54
Eric Sesterhennf5afe802006-02-28 15:34:49 +010055 slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 if (!slot)
57 goto error_nomem;
Eric Sesterhennf5afe802006-02-28 15:34:49 +010058 slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 if (!slot->hotplug_slot)
60 goto error_slot;
Eric Sesterhennf5afe802006-02-28 15:34:49 +010061 slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 GFP_KERNEL);
63 if (!slot->hotplug_slot->info)
64 goto error_hpslot;
Alex Chiangb2132fe2008-10-20 17:41:43 -060065 slot->name = kstrdup(drc_name, GFP_KERNEL);
66 if (!slot->name)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 goto error_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 slot->dn = dn;
69 slot->index = drc_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 slot->power_domain = power_domain;
71 slot->hotplug_slot->private = slot;
72 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
73 slot->hotplug_slot->release = &rpaphp_release_slot;
74
75 return (slot);
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077error_info:
78 kfree(slot->hotplug_slot->info);
79error_hpslot:
80 kfree(slot->hotplug_slot);
81error_slot:
82 kfree(slot);
83error_nomem:
84 return NULL;
85}
86
87static int is_registered(struct slot *slot)
88{
Linas Vepstas5fd39c32007-04-13 15:34:10 -070089 struct slot *tmp_slot;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
92 if (!strcmp(tmp_slot->name, slot->name))
93 return 1;
94 }
95 return 0;
96}
97
linas@austin.ibm.comf6afbad2006-01-12 18:31:01 -060098int rpaphp_deregister_slot(struct slot *slot)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
100 int retval = 0;
101 struct hotplug_slot *php_slot = slot->hotplug_slot;
102
103 dbg("%s - Entry: deregistering slot=%s\n",
Harvey Harrison66bef8c2008-03-03 19:09:46 -0800104 __func__, slot->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106 list_del(&slot->rpaphp_slot_list);
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 retval = pci_hp_deregister(php_slot);
109 if (retval)
110 err("Problem unregistering a slot %s\n", slot->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Harvey Harrison66bef8c2008-03-03 19:09:46 -0800112 dbg("%s - Exit: rc[%d]\n", __func__, retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 return retval;
114}
Linas Vepstas61ee9cd2006-02-01 18:21:09 -0600115EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
linas@austin.ibm.comf6afbad2006-01-12 18:31:01 -0600117int rpaphp_register_slot(struct slot *slot)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
Linas Vepstasf1e79092006-12-01 16:31:27 -0800119 struct hotplug_slot *php_slot = slot->hotplug_slot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 int retval;
Alex Chiangf46753c2008-06-10 15:28:50 -0600121 int slotno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
Harvey Harrison66bef8c2008-03-03 19:09:46 -0800124 __func__, slot->dn->full_name, slot->index, slot->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 slot->power_domain, slot->type);
Linas Vepstasf1e79092006-12-01 16:31:27 -0800126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 /* should not try to register the same slot twice */
Linas Vepstasf1e79092006-12-01 16:31:27 -0800128 if (is_registered(slot)) {
linas@austin.ibm.comf6afbad2006-01-12 18:31:01 -0600129 err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
Linas Vepstas3499f0722007-04-13 15:34:11 -0700130 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 }
Linas Vepstasf1e79092006-12-01 16:31:27 -0800132
Alex Chiangf46753c2008-06-10 15:28:50 -0600133 if (slot->dn->child)
134 slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
135 else
136 slotno = -1;
Alex Chiang1359f272008-10-20 17:40:42 -0600137 retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 if (retval) {
139 err("pci_hp_register failed with error %d\n", retval);
Linas Vepstas3499f0722007-04-13 15:34:11 -0700140 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 }
Linas Vepstasf1e79092006-12-01 16:31:27 -0800142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 /* add slot to our internal list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
Linas Vepstas1b7c9fc2007-11-25 23:51:37 -0800145 info("Slot [%s] registered\n", slot->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 return 0;
147}
148