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20#define pr_fmt(fmt) "acpiphp: " fmt
21
22#include <linux/init.h>
23#include <linux/module.h>
24#include <linux/moduleparam.h>
25
26#include <linux/kernel.h>
27#include <linux/pci.h>
28#include <linux/pci-acpi.h>
29#include <linux/pci_hotplug.h>
30#include <linux/slab.h>
31#include <linux/smp.h>
32#include "acpiphp.h"
33
34
35#define SLOT_NAME_SIZE 21
36
37bool acpiphp_disabled;
38
39
40static struct acpiphp_attention_info *attention_info;
41
42#define DRIVER_VERSION "0.5"
43#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@infradead.org>"
44#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
45
46MODULE_AUTHOR(DRIVER_AUTHOR);
47MODULE_DESCRIPTION(DRIVER_DESC);
48MODULE_LICENSE("GPL");
49MODULE_PARM_DESC(disable, "disable acpiphp driver");
50module_param_named(disable, acpiphp_disabled, bool, 0444);
51
52static int enable_slot(struct hotplug_slot *slot);
53static int disable_slot(struct hotplug_slot *slot);
54static int set_attention_status(struct hotplug_slot *slot, u8 value);
55static int get_power_status(struct hotplug_slot *slot, u8 *value);
56static int get_attention_status(struct hotplug_slot *slot, u8 *value);
57static int get_latch_status(struct hotplug_slot *slot, u8 *value);
58static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
59
60static const struct hotplug_slot_ops acpi_hotplug_slot_ops = {
61 .enable_slot = enable_slot,
62 .disable_slot = disable_slot,
63 .set_attention_status = set_attention_status,
64 .get_power_status = get_power_status,
65 .get_attention_status = get_attention_status,
66 .get_latch_status = get_latch_status,
67 .get_adapter_status = get_adapter_status,
68};
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76
77
78int acpiphp_register_attention(struct acpiphp_attention_info *info)
79{
80 int retval = -EINVAL;
81
82 if (info && info->owner && info->set_attn &&
83 info->get_attn && !attention_info) {
84 retval = 0;
85 attention_info = info;
86 }
87 return retval;
88}
89EXPORT_SYMBOL_GPL(acpiphp_register_attention);
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99
100int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
101{
102 int retval = -EINVAL;
103
104 if (info && attention_info == info) {
105 attention_info = NULL;
106 retval = 0;
107 }
108 return retval;
109}
110EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
111
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118
119static int enable_slot(struct hotplug_slot *hotplug_slot)
120{
121 struct slot *slot = to_slot(hotplug_slot);
122
123 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
124
125
126 return acpiphp_enable_slot(slot->acpi_slot);
127}
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135
136static int disable_slot(struct hotplug_slot *hotplug_slot)
137{
138 struct slot *slot = to_slot(hotplug_slot);
139
140 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
141
142
143 return acpiphp_disable_slot(slot->acpi_slot);
144}
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155
156static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
157{
158 int retval = -ENODEV;
159
160 pr_debug("%s - physical_slot = %s\n", __func__,
161 hotplug_slot_name(hotplug_slot));
162
163 if (attention_info && try_module_get(attention_info->owner)) {
164 retval = attention_info->set_attn(hotplug_slot, status);
165 module_put(attention_info->owner);
166 } else
167 attention_info = NULL;
168 return retval;
169}
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179
180static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
181{
182 struct slot *slot = to_slot(hotplug_slot);
183
184 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
185
186 *value = acpiphp_get_power_status(slot->acpi_slot);
187
188 return 0;
189}
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201
202static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
203{
204 int retval = -EINVAL;
205
206 pr_debug("%s - physical_slot = %s\n", __func__,
207 hotplug_slot_name(hotplug_slot));
208
209 if (attention_info && try_module_get(attention_info->owner)) {
210 retval = attention_info->get_attn(hotplug_slot, value);
211 module_put(attention_info->owner);
212 } else
213 attention_info = NULL;
214 return retval;
215}
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225
226static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
227{
228 struct slot *slot = to_slot(hotplug_slot);
229
230 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
231
232 *value = acpiphp_get_latch_status(slot->acpi_slot);
233
234 return 0;
235}
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245
246static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
247{
248 struct slot *slot = to_slot(hotplug_slot);
249
250 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
251
252 *value = acpiphp_get_adapter_status(slot->acpi_slot);
253
254 return 0;
255}
256
257
258int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
259 unsigned int sun)
260{
261 struct slot *slot;
262 int retval = -ENOMEM;
263 char name[SLOT_NAME_SIZE];
264
265 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
266 if (!slot)
267 goto error;
268
269 slot->hotplug_slot.ops = &acpi_hotplug_slot_ops;
270
271 slot->acpi_slot = acpiphp_slot;
272
273 acpiphp_slot->slot = slot;
274 slot->sun = sun;
275 snprintf(name, SLOT_NAME_SIZE, "%u", sun);
276
277 retval = pci_hp_register(&slot->hotplug_slot, acpiphp_slot->bus,
278 acpiphp_slot->device, name);
279 if (retval == -EBUSY)
280 goto error_slot;
281 if (retval) {
282 pr_err("pci_hp_register failed with error %d\n", retval);
283 goto error_slot;
284 }
285
286 pr_info("Slot [%s] registered\n", slot_name(slot));
287
288 return 0;
289error_slot:
290 kfree(slot);
291error:
292 return retval;
293}
294
295
296void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
297{
298 struct slot *slot = acpiphp_slot->slot;
299
300 pr_info("Slot [%s] unregistered\n", slot_name(slot));
301
302 pci_hp_deregister(&slot->hotplug_slot);
303 kfree(slot);
304}
305
306
307void __init acpiphp_init(void)
308{
309 pr_info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
310 acpiphp_disabled ? ", disabled by user; please report a bug"
311 : "");
312}
313