1 /*
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>
27 #include <linux/kobject.h>
28 #include <linux/sysfs.h>
29 #include <linux/pci.h>
30 #include <asm/rtas.h>
31 #include "rpaphp.h"
32
33 static ssize_t removable_read_file (struct hotplug_slot *php_slot, char *buf)
34 {
35 u8 value;
36 int retval = -ENOENT;
37 struct slot *slot = (struct slot *)php_slot->private;
38
39 if (!slot)
40 return retval;
41
42 value = slot->removable;
43 retval = sprintf (buf, "%d\n", value);
44 return retval;
45 }
46
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,
50 };
51
52 static void rpaphp_sysfs_add_attr_removable (struct hotplug_slot *slot)
53 {
54 sysfs_create_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
55 }
56
57 static void rpaphp_sysfs_remove_attr_removable (struct hotplug_slot *slot)
58 {
59 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
60 }
61
62 static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf)
63 {
64 char *value;
65 int retval = -ENOENT;
66 struct slot *slot = (struct slot *)php_slot->private;
67
68 if (!slot)
69 return retval;
70
71 value = slot->location;
72 retval = sprintf (buf, "%s\n", value);
73 return retval;
74 }
75
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,
79 };
80
81 static void rpaphp_sysfs_add_attr_location (struct hotplug_slot *slot)
82 {
83 sysfs_create_file(&slot->kobj, &hotplug_slot_attr_location.attr);
84 }
85
86 static void rpaphp_sysfs_remove_attr_location (struct hotplug_slot *slot)
87 {
88 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_location.attr);
89 }
90
91 /* free up the memory used by a slot */
92 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
93 {
94 struct slot *slot = (struct slot *) hotplug_slot->private;
95
96 dealloc_slot_struct(slot);
97 }
98
99 void dealloc_slot_struct(struct slot *slot)
100 {
101 struct list_head *ln, *n;
102
103 if (slot->dev_type == PCI_DEV) {
104 list_for_each_safe (ln, n, &slot->dev.pci_funcs) {
105 struct rpaphp_pci_func *func;
106
107 func = list_entry(ln, struct rpaphp_pci_func, sibling);
108 kfree(func);
109 }
110 }
111
112 kfree(slot->hotplug_slot->info);
113 kfree(slot->hotplug_slot->name);
114 kfree(slot->hotplug_slot);
115 kfree(slot);
116 return;
117 }
118
119 struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
120 int power_domain)
121 {
122 struct slot *slot;
123
124 slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
125 if (!slot)
126 goto error_nomem;
127 memset(slot, 0, sizeof (struct slot));
128 slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
129 if (!slot->hotplug_slot)
130 goto error_slot;
131 memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
132 slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info),
133 GFP_KERNEL);
134 if (!slot->hotplug_slot->info)
135 goto error_hpslot;
136 memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
137 slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
138 if (!slot->hotplug_slot->name)
139 goto error_info;
140 slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
141 if (!slot->location)
142 goto error_name;
143 slot->name = slot->hotplug_slot->name;
144 slot->dn = dn;
145 slot->index = drc_index;
146 strcpy(slot->location, drc_name);
147 slot->power_domain = power_domain;
148 slot->hotplug_slot->private = slot;
149 slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
150 slot->hotplug_slot->release = &rpaphp_release_slot;
151
152 return (slot);
153
154 error_name:
155 kfree(slot->hotplug_slot->name);
156 error_info:
157 kfree(slot->hotplug_slot->info);
158 error_hpslot:
159 kfree(slot->hotplug_slot);
160 error_slot:
161 kfree(slot);
162 error_nomem:
163 return NULL;
164 }
165
166 static int is_registered(struct slot *slot)
167 {
168 struct slot *tmp_slot;
169
170 list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
171 if (!strcmp(tmp_slot->name, slot->name))
172 return 1;
173 }
174 return 0;
175 }
176
177 int deregister_slot(struct slot *slot)
178 {
179 int retval = 0;
180 struct hotplug_slot *php_slot = slot->hotplug_slot;
181
182 dbg("%s - Entry: deregistering slot=%s\n",
183 __FUNCTION__, slot->name);
184
185 list_del(&slot->rpaphp_slot_list);
186
187 /* remove "phy_location" file */
188 rpaphp_sysfs_remove_attr_location(php_slot);
189
190 /* remove "phy_removable" file */
191 rpaphp_sysfs_remove_attr_removable(php_slot);
192
193 retval = pci_hp_deregister(php_slot);
194 if (retval)
195 err("Problem unregistering a slot %s\n", slot->name);
196 else
197 num_slots--;
198
199 dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
200 return retval;
201 }
202
203 int register_slot(struct slot *slot)
204 {
205 int retval;
206
207 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
208 __FUNCTION__, slot->dn->full_name, slot->index, slot->name,
209 slot->power_domain, slot->type);
210 /* should not try to register the same slot twice */
211 if (is_registered(slot)) { /* should't be here */
212 err("register_slot: slot[%s] is already registered\n", slot->name);
213 rpaphp_release_slot(slot->hotplug_slot);
214 return 1;
215 }
216 retval = pci_hp_register(slot->hotplug_slot);
217 if (retval) {
218 err("pci_hp_register failed with error %d\n", retval);
219 rpaphp_release_slot(slot->hotplug_slot);
220 return retval;
221 }
222
223 /* create "phy_locatoin" file */
224 rpaphp_sysfs_add_attr_location(slot->hotplug_slot);
225
226 /* create "phy_removable" file */
227 rpaphp_sysfs_add_attr_removable(slot->hotplug_slot);
228
229 /* add slot to our internal list */
230 dbg("%s adding slot[%s] to rpaphp_slot_list\n",
231 __FUNCTION__, slot->name);
232
233 list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
234
235 if (slot->dev_type == VIO_DEV)
236 info("Slot [%s](VIO location=%s) registered\n",
237 slot->name, slot->location);
238 else
239 info("Slot [%s](PCI location=%s) registered\n",
240 slot->name, slot->location);
241 num_slots++;
242 return 0;
243 }
244
245 int rpaphp_get_power_status(struct slot *slot, u8 * value)
246 {
247 int rc = 0, level;
248
249 if (slot->type == HOTPLUG) {
250 rc = rtas_get_power_level(slot->power_domain, &level);
251 if (!rc) {
252 dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
253 __FUNCTION__, slot->name, slot->power_domain, level);
254 *value = level;
255 } else
256 err("failed to get power-level for slot(%s), rc=0x%x\n",
257 slot->location, rc);
258 } else {
259 dbg("%s report POWER_ON for EMBEDDED or PHB slot %s\n",
260 __FUNCTION__, slot->location);
261 *value = (u8) POWER_ON;
262 }
263
264 return rc;
265 }
266
267 int rpaphp_set_attention_status(struct slot *slot, u8 status)
268 {
269 int rc;
270
271 /* status: LED_OFF or LED_ON */
272 rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
273 if (rc)
274 err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
275 slot->name, slot->location, slot->index, status, rc);
276
277 return rc;
278 }
279
|
This page was automatically generated by the
LXR engine.
|