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>
33 static ssize_t removable_read_file (struct hotplug_slot *php_slot, char *buf)
37 struct slot *slot = (struct slot *)php_slot->private;
42 value = slot->removable;
43 retval = sprintf (buf, "%d\n", value);
47 static struct hotplug_slot_attribute hotplug_slot_attr_removable = {
48 .attr = {.name = "phy_removable", .mode = S_IFREG | S_IRUGO},
49 .show = removable_read_file,
52 static void rpaphp_sysfs_add_attr_removable (struct hotplug_slot *slot)
54 sysfs_create_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
57 static void rpaphp_sysfs_remove_attr_removable (struct hotplug_slot *slot)
59 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
62 static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf)
66 struct slot *slot = (struct slot *)php_slot->private;
71 value = slot->location;
72 retval = sprintf (buf, "%s\n", value);
76 static struct hotplug_slot_attribute hotplug_slot_attr_location = {
77 .attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO},
78 .show = location_read_file,
81 static void rpaphp_sysfs_add_attr_location (struct hotplug_slot *slot)
83 sysfs_create_file(&slot->kobj, &hotplug_slot_attr_location.attr);
86 static void rpaphp_sysfs_remove_attr_location (struct hotplug_slot *slot)
88 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_location.attr);
91 /* free up the memory used by a slot */
92 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
94 struct slot *slot = (struct slot *) hotplug_slot->private;
96 dealloc_slot_struct(slot);
99 void dealloc_slot_struct(struct slot *slot)
101 kfree(slot->hotplug_slot->info);
102 kfree(slot->hotplug_slot->name);
103 kfree(slot->hotplug_slot);
108 struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
113 slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
116 memset(slot, 0, sizeof (struct slot));
117 slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
118 if (!slot->hotplug_slot)
120 memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
121 slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info),
123 if (!slot->hotplug_slot->info)
125 memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
126 slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
127 if (!slot->hotplug_slot->name)
129 slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
132 slot->name = slot->hotplug_slot->name;
134 slot->index = drc_index;
135 strcpy(slot->location, drc_name);
136 slot->power_domain = power_domain;
137 slot->hotplug_slot->private = slot;
138 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
139 slot->hotplug_slot->release = &rpaphp_release_slot;
144 kfree(slot->hotplug_slot->name);
146 kfree(slot->hotplug_slot->info);
148 kfree(slot->hotplug_slot);
155 static int is_registered(struct slot *slot)
157 struct slot *tmp_slot;
159 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
160 if (!strcmp(tmp_slot->name, slot->name))
166 int deregister_slot(struct slot *slot)
169 struct hotplug_slot *php_slot = slot->hotplug_slot;
171 dbg("%s - Entry: deregistering slot=%s\n",
172 __FUNCTION__, slot->name);
174 list_del(&slot->rpaphp_slot_list);
176 /* remove "phy_location" file */
177 rpaphp_sysfs_remove_attr_location(php_slot);
179 /* remove "phy_removable" file */
180 rpaphp_sysfs_remove_attr_removable(php_slot);
182 retval = pci_hp_deregister(php_slot);
184 err("Problem unregistering a slot %s\n", slot->name);
188 dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
192 int register_slot(struct slot *slot)
196 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
197 __FUNCTION__, slot->dn->full_name, slot->index, slot->name,
198 slot->power_domain, slot->type);
199 /* should not try to register the same slot twice */
200 if (is_registered(slot)) { /* should't be here */
201 err("register_slot: slot[%s] is already registered\n", slot->name);
202 rpaphp_release_slot(slot->hotplug_slot);
205 retval = pci_hp_register(slot->hotplug_slot);
207 err("pci_hp_register failed with error %d\n", retval);
208 rpaphp_release_slot(slot->hotplug_slot);
212 /* create "phy_locatoin" file */
213 rpaphp_sysfs_add_attr_location(slot->hotplug_slot);
215 /* create "phy_removable" file */
216 rpaphp_sysfs_add_attr_removable(slot->hotplug_slot);
218 /* add slot to our internal list */
219 dbg("%s adding slot[%s] to rpaphp_slot_list\n",
220 __FUNCTION__, slot->name);
222 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
224 if (slot->dev_type == VIO_DEV)
225 info("Slot [%s](VIO location=%s) registered\n",
226 slot->name, slot->location);
228 info("Slot [%s](PCI location=%s) registered\n",
229 slot->name, slot->location);
234 int rpaphp_get_power_status(struct slot *slot, u8 * value)
238 if (slot->type == HOTPLUG) {
239 rc = rtas_get_power_level(slot->power_domain, &level);
241 dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
242 __FUNCTION__, slot->name, slot->power_domain, level);
245 err("failed to get power-level for slot(%s), rc=0x%x\n",
248 dbg("%s report POWER_ON for EMBEDDED or PHB slot %s\n",
249 __FUNCTION__, slot->location);
250 *value = (u8) POWER_ON;
256 int rpaphp_set_attention_status(struct slot *slot, u8 status)
260 /* status: LED_OFF or LED_ON */
261 rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
263 err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
264 slot->name, slot->location, slot->index, status, rc);