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1da177e4 LT |
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> | |
4e57b681 TS |
30 | #include <linux/string.h> |
31 | #include <linux/slab.h> | |
32 | ||
1da177e4 LT |
33 | #include <asm/rtas.h> |
34 | #include "rpaphp.h" | |
35 | ||
1da177e4 LT |
36 | static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf) |
37 | { | |
f6afbad8 | 38 | char *value; |
39 | int retval = -ENOENT; | |
1da177e4 LT |
40 | struct slot *slot = (struct slot *)php_slot->private; |
41 | ||
42 | if (!slot) | |
43 | return retval; | |
44 | ||
f6afbad8 | 45 | value = slot->location; |
46 | retval = sprintf (buf, "%s\n", value); | |
47 | return retval; | |
1da177e4 LT |
48 | } |
49 | ||
50 | static struct hotplug_slot_attribute hotplug_slot_attr_location = { | |
51 | .attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO}, | |
52 | .show = location_read_file, | |
53 | }; | |
54 | ||
55 | static void rpaphp_sysfs_add_attr_location (struct hotplug_slot *slot) | |
56 | { | |
57 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_location.attr); | |
58 | } | |
59 | ||
60 | static void rpaphp_sysfs_remove_attr_location (struct hotplug_slot *slot) | |
61 | { | |
62 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_location.attr); | |
63 | } | |
64 | ||
65 | /* free up the memory used by a slot */ | |
66 | static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot) | |
67 | { | |
68 | struct slot *slot = (struct slot *) hotplug_slot->private; | |
69 | ||
70 | dealloc_slot_struct(slot); | |
71 | } | |
72 | ||
73 | void dealloc_slot_struct(struct slot *slot) | |
74 | { | |
75 | kfree(slot->hotplug_slot->info); | |
76 | kfree(slot->hotplug_slot->name); | |
77 | kfree(slot->hotplug_slot); | |
78 | kfree(slot); | |
79 | return; | |
80 | } | |
81 | ||
82 | struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, | |
83 | int power_domain) | |
84 | { | |
85 | struct slot *slot; | |
86 | ||
87 | slot = kmalloc(sizeof (struct slot), GFP_KERNEL); | |
88 | if (!slot) | |
89 | goto error_nomem; | |
90 | memset(slot, 0, sizeof (struct slot)); | |
91 | slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL); | |
92 | if (!slot->hotplug_slot) | |
93 | goto error_slot; | |
94 | memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot)); | |
95 | slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info), | |
96 | GFP_KERNEL); | |
97 | if (!slot->hotplug_slot->info) | |
98 | goto error_hpslot; | |
99 | memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info)); | |
100 | slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL); | |
101 | if (!slot->hotplug_slot->name) | |
102 | goto error_info; | |
103 | slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL); | |
104 | if (!slot->location) | |
105 | goto error_name; | |
106 | slot->name = slot->hotplug_slot->name; | |
107 | slot->dn = dn; | |
108 | slot->index = drc_index; | |
109 | strcpy(slot->location, drc_name); | |
110 | slot->power_domain = power_domain; | |
111 | slot->hotplug_slot->private = slot; | |
112 | slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops; | |
113 | slot->hotplug_slot->release = &rpaphp_release_slot; | |
114 | ||
115 | return (slot); | |
116 | ||
117 | error_name: | |
118 | kfree(slot->hotplug_slot->name); | |
119 | error_info: | |
120 | kfree(slot->hotplug_slot->info); | |
121 | error_hpslot: | |
122 | kfree(slot->hotplug_slot); | |
123 | error_slot: | |
124 | kfree(slot); | |
125 | error_nomem: | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | static int is_registered(struct slot *slot) | |
130 | { | |
131 | struct slot *tmp_slot; | |
132 | ||
133 | list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) { | |
134 | if (!strcmp(tmp_slot->name, slot->name)) | |
135 | return 1; | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
f6afbad8 | 140 | int rpaphp_deregister_slot(struct slot *slot) |
1da177e4 LT |
141 | { |
142 | int retval = 0; | |
143 | struct hotplug_slot *php_slot = slot->hotplug_slot; | |
144 | ||
145 | dbg("%s - Entry: deregistering slot=%s\n", | |
146 | __FUNCTION__, slot->name); | |
147 | ||
148 | list_del(&slot->rpaphp_slot_list); | |
149 | ||
150 | /* remove "phy_location" file */ | |
151 | rpaphp_sysfs_remove_attr_location(php_slot); | |
152 | ||
1da177e4 LT |
153 | retval = pci_hp_deregister(php_slot); |
154 | if (retval) | |
155 | err("Problem unregistering a slot %s\n", slot->name); | |
156 | else | |
157 | num_slots--; | |
158 | ||
159 | dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval); | |
160 | return retval; | |
161 | } | |
61ee9cd5 | 162 | EXPORT_SYMBOL_GPL(rpaphp_deregister_slot); |
1da177e4 | 163 | |
f6afbad8 | 164 | int rpaphp_register_slot(struct slot *slot) |
1da177e4 LT |
165 | { |
166 | int retval; | |
167 | ||
168 | dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n", | |
169 | __FUNCTION__, slot->dn->full_name, slot->index, slot->name, | |
170 | slot->power_domain, slot->type); | |
171 | /* should not try to register the same slot twice */ | |
172 | if (is_registered(slot)) { /* should't be here */ | |
f6afbad8 | 173 | err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name); |
1da177e4 LT |
174 | rpaphp_release_slot(slot->hotplug_slot); |
175 | return -EAGAIN; | |
176 | } | |
177 | retval = pci_hp_register(slot->hotplug_slot); | |
178 | if (retval) { | |
179 | err("pci_hp_register failed with error %d\n", retval); | |
180 | rpaphp_release_slot(slot->hotplug_slot); | |
181 | return retval; | |
182 | } | |
183 | ||
184 | /* create "phy_locatoin" file */ | |
185 | rpaphp_sysfs_add_attr_location(slot->hotplug_slot); | |
186 | ||
1da177e4 LT |
187 | /* add slot to our internal list */ |
188 | dbg("%s adding slot[%s] to rpaphp_slot_list\n", | |
189 | __FUNCTION__, slot->name); | |
190 | ||
191 | list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head); | |
5eeb8c63 JR |
192 | info("Slot [%s](PCI location=%s) registered\n", slot->name, |
193 | slot->location); | |
1da177e4 LT |
194 | num_slots++; |
195 | return 0; | |
196 | } | |
197 | ||
198 | int rpaphp_get_power_status(struct slot *slot, u8 * value) | |
199 | { | |
200 | int rc = 0, level; | |
201 | ||
56d8456b JR |
202 | rc = rtas_get_power_level(slot->power_domain, &level); |
203 | if (rc < 0) { | |
204 | err("failed to get power-level for slot(%s), rc=0x%x\n", | |
205 | slot->location, rc); | |
206 | return rc; | |
1da177e4 LT |
207 | } |
208 | ||
56d8456b JR |
209 | dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n", |
210 | __FUNCTION__, slot->name, slot->power_domain, level); | |
211 | *value = level; | |
212 | ||
1da177e4 LT |
213 | return rc; |
214 | } | |
215 | ||
216 | int rpaphp_set_attention_status(struct slot *slot, u8 status) | |
217 | { | |
218 | int rc; | |
219 | ||
220 | /* status: LED_OFF or LED_ON */ | |
221 | rc = rtas_set_indicator(DR_INDICATOR, slot->index, status); | |
222 | if (rc < 0) | |
223 | err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n", | |
224 | slot->name, slot->location, slot->index, status, rc); | |
225 | ||
226 | return rc; | |
227 | } |