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33
34#define pr_fmt(fmt) "acpiphp: " fmt
35
36#include <linux/init.h>
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39
40#include <linux/kernel.h>
41#include <linux/pci.h>
42#include <linux/pci-acpi.h>
43#include <linux/pci_hotplug.h>
44#include <linux/slab.h>
45#include <linux/smp.h>
46#include "acpiphp.h"
47
48
49#define SLOT_NAME_SIZE 21
50
51bool acpiphp_disabled;
52
53
54static struct acpiphp_attention_info *attention_info;
55
56#define DRIVER_VERSION "0.5"
57#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
58#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
59
60MODULE_AUTHOR(DRIVER_AUTHOR);
61MODULE_DESCRIPTION(DRIVER_DESC);
62MODULE_LICENSE("GPL");
63MODULE_PARM_DESC(disable, "disable acpiphp driver");
64module_param_named(disable, acpiphp_disabled, bool, 0444);
65
66static int enable_slot(struct hotplug_slot *slot);
67static int disable_slot(struct hotplug_slot *slot);
68static int set_attention_status(struct hotplug_slot *slot, u8 value);
69static int get_power_status(struct hotplug_slot *slot, u8 *value);
70static int get_attention_status(struct hotplug_slot *slot, u8 *value);
71static int get_latch_status(struct hotplug_slot *slot, u8 *value);
72static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
73
74static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
75 .enable_slot = enable_slot,
76 .disable_slot = disable_slot,
77 .set_attention_status = set_attention_status,
78 .get_power_status = get_power_status,
79 .get_attention_status = get_attention_status,
80 .get_latch_status = get_latch_status,
81 .get_adapter_status = get_adapter_status,
82};
83
84
85
86
87
88
89
90
91
92int acpiphp_register_attention(struct acpiphp_attention_info *info)
93{
94 int retval = -EINVAL;
95
96 if (info && info->owner && info->set_attn &&
97 info->get_attn && !attention_info) {
98 retval = 0;
99 attention_info = info;
100 }
101 return retval;
102}
103EXPORT_SYMBOL_GPL(acpiphp_register_attention);
104
105
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108
109
110
111
112
113
114int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
115{
116 int retval = -EINVAL;
117
118 if (info && attention_info == info) {
119 attention_info = NULL;
120 retval = 0;
121 }
122 return retval;
123}
124EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
125
126
127
128
129
130
131
132
133static int enable_slot(struct hotplug_slot *hotplug_slot)
134{
135 struct slot *slot = hotplug_slot->private;
136
137 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
138
139
140 return acpiphp_enable_slot(slot->acpi_slot);
141}
142
143
144
145
146
147
148
149
150static int disable_slot(struct hotplug_slot *hotplug_slot)
151{
152 struct slot *slot = hotplug_slot->private;
153
154 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
155
156
157 return acpiphp_disable_slot(slot->acpi_slot);
158}
159
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163
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167
168
169
170static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
171{
172 int retval = -ENODEV;
173
174 pr_debug("%s - physical_slot = %s\n", __func__,
175 hotplug_slot_name(hotplug_slot));
176
177 if (attention_info && try_module_get(attention_info->owner)) {
178 retval = attention_info->set_attn(hotplug_slot, status);
179 module_put(attention_info->owner);
180 } else
181 attention_info = NULL;
182 return retval;
183}
184
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192
193
194static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
195{
196 struct slot *slot = hotplug_slot->private;
197
198 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
199
200 *value = acpiphp_get_power_status(slot->acpi_slot);
201
202 return 0;
203}
204
205
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213
214
215
216static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
217{
218 int retval = -EINVAL;
219
220 pr_debug("%s - physical_slot = %s\n", __func__,
221 hotplug_slot_name(hotplug_slot));
222
223 if (attention_info && try_module_get(attention_info->owner)) {
224 retval = attention_info->get_attn(hotplug_slot, value);
225 module_put(attention_info->owner);
226 } else
227 attention_info = NULL;
228 return retval;
229}
230
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233
234
235
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237
238
239
240static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
241{
242 struct slot *slot = hotplug_slot->private;
243
244 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
245
246 *value = acpiphp_get_latch_status(slot->acpi_slot);
247
248 return 0;
249}
250
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253
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257
258
259
260static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
261{
262 struct slot *slot = hotplug_slot->private;
263
264 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
265
266 *value = acpiphp_get_adapter_status(slot->acpi_slot);
267
268 return 0;
269}
270
271
272
273
274
275static void release_slot(struct hotplug_slot *hotplug_slot)
276{
277 struct slot *slot = hotplug_slot->private;
278
279 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
280
281 kfree(slot->hotplug_slot);
282 kfree(slot);
283}
284
285
286int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
287 unsigned int sun)
288{
289 struct slot *slot;
290 int retval = -ENOMEM;
291 char name[SLOT_NAME_SIZE];
292
293 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
294 if (!slot)
295 goto error;
296
297 slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
298 if (!slot->hotplug_slot)
299 goto error_slot;
300
301 slot->hotplug_slot->info = &slot->info;
302
303 slot->hotplug_slot->private = slot;
304 slot->hotplug_slot->release = &release_slot;
305 slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
306
307 slot->acpi_slot = acpiphp_slot;
308 slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
309 slot->hotplug_slot->info->attention_status = 0;
310 slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
311 slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
312
313 acpiphp_slot->slot = slot;
314 slot->sun = sun;
315 snprintf(name, SLOT_NAME_SIZE, "%u", sun);
316
317 retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus,
318 acpiphp_slot->device, name);
319 if (retval == -EBUSY)
320 goto error_hpslot;
321 if (retval) {
322 pr_err("pci_hp_register failed with error %d\n", retval);
323 goto error_hpslot;
324 }
325
326 pr_info("Slot [%s] registered\n", slot_name(slot));
327
328 return 0;
329error_hpslot:
330 kfree(slot->hotplug_slot);
331error_slot:
332 kfree(slot);
333error:
334 return retval;
335}
336
337
338void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
339{
340 struct slot *slot = acpiphp_slot->slot;
341 int retval = 0;
342
343 pr_info("Slot [%s] unregistered\n", slot_name(slot));
344
345 retval = pci_hp_deregister(slot->hotplug_slot);
346 if (retval)
347 pr_err("pci_hp_deregister failed with error %d\n", retval);
348}
349
350
351void __init acpiphp_init(void)
352{
353 pr_info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
354 acpiphp_disabled ? ", disabled by user; please report a bug"
355 : "");
356}
357