2 * RPA Virtual I/O device functions
3 * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com>
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.
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
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.
22 * Send feedback to <lxie@us.ibm.com>
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>
30 #include <linux/string.h>
31 #include <linux/slab.h>
36 /* free up the memory used by a slot */
37 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
39 struct slot *slot = (struct slot *) hotplug_slot->private;
40 dealloc_slot_struct(slot);
43 void dealloc_slot_struct(struct slot *slot)
45 kfree(slot->hotplug_slot->info);
46 kfree(slot->hotplug_slot->name);
47 kfree(slot->hotplug_slot);
51 struct slot *alloc_slot_struct(struct device_node *dn,
52 int drc_index, char *drc_name, int power_domain)
56 slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
59 slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
60 if (!slot->hotplug_slot)
62 slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
64 if (!slot->hotplug_slot->info)
66 slot->hotplug_slot->name = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
67 if (!slot->hotplug_slot->name)
69 slot->name = slot->hotplug_slot->name;
70 strcpy(slot->name, drc_name);
72 slot->index = drc_index;
73 slot->power_domain = power_domain;
74 slot->hotplug_slot->private = slot;
75 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
76 slot->hotplug_slot->release = &rpaphp_release_slot;
81 kfree(slot->hotplug_slot->info);
83 kfree(slot->hotplug_slot);
90 static int is_registered(struct slot *slot)
92 struct slot *tmp_slot;
94 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
95 if (!strcmp(tmp_slot->name, slot->name))
101 int rpaphp_deregister_slot(struct slot *slot)
104 struct hotplug_slot *php_slot = slot->hotplug_slot;
106 dbg("%s - Entry: deregistering slot=%s\n",
107 __func__, slot->name);
109 list_del(&slot->rpaphp_slot_list);
111 retval = pci_hp_deregister(php_slot);
113 err("Problem unregistering a slot %s\n", slot->name);
115 dbg("%s - Exit: rc[%d]\n", __func__, retval);
118 EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
120 int rpaphp_register_slot(struct slot *slot)
122 struct hotplug_slot *php_slot = slot->hotplug_slot;
126 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
127 __func__, slot->dn->full_name, slot->index, slot->name,
128 slot->power_domain, slot->type);
130 /* should not try to register the same slot twice */
131 if (is_registered(slot)) {
132 err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
137 slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
140 retval = pci_hp_register(php_slot, slot->bus, slotno);
142 err("pci_hp_register failed with error %d\n", retval);
146 /* add slot to our internal list */
147 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
148 info("Slot [%s] registered\n", slot->name);