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 static ssize_t address_read_file (struct hotplug_slot *php_slot, char *buf)
39 struct slot *slot = (struct slot *)php_slot->private;
50 retval = sprintf(buf, pci_name(bus->self));
52 retval = sprintf(buf, "%04x:%02x:00.0",
53 pci_domain_nr(bus), bus->number);
58 static struct hotplug_slot_attribute php_attr_address = {
59 .attr = {.name = "address", .mode = S_IFREG | S_IRUGO},
60 .show = address_read_file,
63 /* free up the memory used by a slot */
64 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
66 struct slot *slot = (struct slot *) hotplug_slot->private;
67 dealloc_slot_struct(slot);
70 void dealloc_slot_struct(struct slot *slot)
72 kfree(slot->hotplug_slot->info);
73 kfree(slot->hotplug_slot->name);
74 kfree(slot->hotplug_slot);
78 struct slot *alloc_slot_struct(struct device_node *dn,
79 int drc_index, char *drc_name, int power_domain)
83 slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
86 slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
87 if (!slot->hotplug_slot)
89 slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
91 if (!slot->hotplug_slot->info)
93 slot->hotplug_slot->name = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
94 if (!slot->hotplug_slot->name)
96 slot->name = slot->hotplug_slot->name;
97 strcpy(slot->name, drc_name);
99 slot->index = drc_index;
100 slot->power_domain = power_domain;
101 slot->hotplug_slot->private = slot;
102 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
103 slot->hotplug_slot->release = &rpaphp_release_slot;
108 kfree(slot->hotplug_slot->info);
110 kfree(slot->hotplug_slot);
117 static int is_registered(struct slot *slot)
119 struct slot *tmp_slot;
121 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
122 if (!strcmp(tmp_slot->name, slot->name))
128 int rpaphp_deregister_slot(struct slot *slot)
131 struct hotplug_slot *php_slot = slot->hotplug_slot;
133 dbg("%s - Entry: deregistering slot=%s\n",
134 __func__, slot->name);
136 list_del(&slot->rpaphp_slot_list);
138 /* remove "address" file */
139 sysfs_remove_file(&php_slot->kobj, &php_attr_address.attr);
141 retval = pci_hp_deregister(php_slot);
143 err("Problem unregistering a slot %s\n", slot->name);
145 dbg("%s - Exit: rc[%d]\n", __func__, retval);
148 EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
150 int rpaphp_register_slot(struct slot *slot)
152 struct hotplug_slot *php_slot = slot->hotplug_slot;
155 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
156 __func__, slot->dn->full_name, slot->index, slot->name,
157 slot->power_domain, slot->type);
159 /* should not try to register the same slot twice */
160 if (is_registered(slot)) {
161 err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
165 retval = pci_hp_register(php_slot);
167 err("pci_hp_register failed with error %d\n", retval);
171 /* create "address" file */
172 retval = sysfs_create_file(&php_slot->kobj, &php_attr_address.attr);
174 err("sysfs_create_file failed with error %d\n", retval);
178 /* add slot to our internal list */
179 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
180 info("Slot [%s] registered\n", slot->name);
184 pci_hp_deregister(php_slot);