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 location_read_file (struct hotplug_slot *php_slot, char *buf)
40 struct slot *slot = (struct slot *)php_slot->private;
45 value = slot->location;
46 retval = sprintf (buf, "%s\n", value);
50 static struct hotplug_slot_attribute php_attr_location = {
51 .attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO},
52 .show = location_read_file,
55 /* free up the memory used by a slot */
56 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
58 struct slot *slot = (struct slot *) hotplug_slot->private;
60 dealloc_slot_struct(slot);
63 void dealloc_slot_struct(struct slot *slot)
65 kfree(slot->hotplug_slot->info);
66 kfree(slot->hotplug_slot->name);
67 kfree(slot->hotplug_slot);
72 struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
77 slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
80 slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
81 if (!slot->hotplug_slot)
83 slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
85 if (!slot->hotplug_slot->info)
87 slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
88 if (!slot->hotplug_slot->name)
90 slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
93 slot->name = slot->hotplug_slot->name;
95 slot->index = drc_index;
96 strcpy(slot->location, drc_name);
97 slot->power_domain = power_domain;
98 slot->hotplug_slot->private = slot;
99 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
100 slot->hotplug_slot->release = &rpaphp_release_slot;
105 kfree(slot->hotplug_slot->name);
107 kfree(slot->hotplug_slot->info);
109 kfree(slot->hotplug_slot);
116 static int is_registered(struct slot *slot)
118 struct slot *tmp_slot;
120 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
121 if (!strcmp(tmp_slot->name, slot->name))
127 int rpaphp_deregister_slot(struct slot *slot)
130 struct hotplug_slot *php_slot = slot->hotplug_slot;
132 dbg("%s - Entry: deregistering slot=%s\n",
133 __FUNCTION__, slot->name);
135 list_del(&slot->rpaphp_slot_list);
137 /* remove "phy_location" file */
138 sysfs_remove_file(&php_slot->kobj, &php_attr_location.attr);
140 retval = pci_hp_deregister(php_slot);
142 err("Problem unregistering a slot %s\n", slot->name);
146 dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
149 EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
151 int rpaphp_register_slot(struct slot *slot)
153 struct hotplug_slot *php_slot = slot->hotplug_slot;
156 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
157 __FUNCTION__, slot->dn->full_name, slot->index, slot->name,
158 slot->power_domain, slot->type);
160 /* should not try to register the same slot twice */
161 if (is_registered(slot)) {
162 err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
167 retval = pci_hp_register(php_slot);
169 err("pci_hp_register failed with error %d\n", retval);
173 /* create "phy_location" file */
174 retval = sysfs_create_file(&php_slot->kobj, &php_attr_location.attr);
176 err("sysfs_create_file failed with error %d\n", retval);
180 /* add slot to our internal list */
181 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
182 info("Slot [%s](PCI location=%s) registered\n", slot->name,
188 pci_hp_deregister(php_slot);
190 rpaphp_release_slot(php_slot);
194 int rpaphp_get_power_status(struct slot *slot, u8 * value)
198 rc = rtas_get_power_level(slot->power_domain, &level);
200 err("failed to get power-level for slot(%s), rc=0x%x\n",
205 dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
206 __FUNCTION__, slot->name, slot->power_domain, level);
212 int rpaphp_set_attention_status(struct slot *slot, u8 status)
216 /* status: LED_OFF or LED_ON */
217 rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
219 err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
220 slot->name, slot->location, slot->index, status, rc);