Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
[linux-2.6.git] / drivers / acpi / sysfs.c
1 /*
2  * sysfs.c - ACPI sysfs interface to userspace.
3  */
4
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/moduleparam.h>
8 #include <acpi/acpi_drivers.h>
9
10 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
11 ACPI_MODULE_NAME("sysfs");
12
13 #define PREFIX "ACPI: "
14
15 #ifdef CONFIG_ACPI_DEBUG
16 /*
17  * ACPI debug sysfs I/F, including:
18  * /sys/modules/acpi/parameters/debug_layer
19  * /sys/modules/acpi/parameters/debug_level
20  * /sys/modules/acpi/parameters/trace_method_name
21  * /sys/modules/acpi/parameters/trace_state
22  * /sys/modules/acpi/parameters/trace_debug_layer
23  * /sys/modules/acpi/parameters/trace_debug_level
24  */
25
26 struct acpi_dlayer {
27         const char *name;
28         unsigned long value;
29 };
30 struct acpi_dlevel {
31         const char *name;
32         unsigned long value;
33 };
34 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
35
36 static const struct acpi_dlayer acpi_debug_layers[] = {
37         ACPI_DEBUG_INIT(ACPI_UTILITIES),
38         ACPI_DEBUG_INIT(ACPI_HARDWARE),
39         ACPI_DEBUG_INIT(ACPI_EVENTS),
40         ACPI_DEBUG_INIT(ACPI_TABLES),
41         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
42         ACPI_DEBUG_INIT(ACPI_PARSER),
43         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
44         ACPI_DEBUG_INIT(ACPI_EXECUTER),
45         ACPI_DEBUG_INIT(ACPI_RESOURCES),
46         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
47         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
48         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
49         ACPI_DEBUG_INIT(ACPI_COMPILER),
50         ACPI_DEBUG_INIT(ACPI_TOOLS),
51
52         ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
53         ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
54         ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
55         ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
56         ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
57         ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
58         ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
59         ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
60         ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
61         ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
62         ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
63         ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
64         ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
65         ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
66 };
67
68 static const struct acpi_dlevel acpi_debug_levels[] = {
69         ACPI_DEBUG_INIT(ACPI_LV_INIT),
70         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
71         ACPI_DEBUG_INIT(ACPI_LV_INFO),
72
73         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
74         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
75         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
76         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
77         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
78         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
79         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
80         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
81         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
82         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
83         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
84         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
85         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
86         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
87
88         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
89         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
90         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
91
92         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
93         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
94         ACPI_DEBUG_INIT(ACPI_LV_IO),
95         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
96
97         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
98         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
99         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
100         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
101 };
102
103 static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
104 {
105         int result = 0;
106         int i;
107
108         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
109
110         for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
111                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
112                                   acpi_debug_layers[i].name,
113                                   acpi_debug_layers[i].value,
114                                   (acpi_dbg_layer & acpi_debug_layers[i].value)
115                                   ? '*' : ' ');
116         }
117         result +=
118             sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
119                     ACPI_ALL_DRIVERS,
120                     (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
121                     ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
122                     == 0 ? ' ' : '-');
123         result +=
124             sprintf(buffer + result,
125                     "--\ndebug_layer = 0x%08X ( * = enabled)\n",
126                     acpi_dbg_layer);
127
128         return result;
129 }
130
131 static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
132 {
133         int result = 0;
134         int i;
135
136         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
137
138         for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
139                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
140                                   acpi_debug_levels[i].name,
141                                   acpi_debug_levels[i].value,
142                                   (acpi_dbg_level & acpi_debug_levels[i].value)
143                                   ? '*' : ' ');
144         }
145         result +=
146             sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
147                     acpi_dbg_level);
148
149         return result;
150 }
151
152 static struct kernel_param_ops param_ops_debug_layer = {
153         .set = param_set_uint,
154         .get = param_get_debug_layer,
155 };
156
157 static struct kernel_param_ops param_ops_debug_level = {
158         .set = param_set_uint,
159         .get = param_get_debug_level,
160 };
161
162 module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
163 module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
164
165 static char trace_method_name[6];
166 module_param_string(trace_method_name, trace_method_name, 6, 0644);
167 static unsigned int trace_debug_layer;
168 module_param(trace_debug_layer, uint, 0644);
169 static unsigned int trace_debug_level;
170 module_param(trace_debug_level, uint, 0644);
171
172 static int param_set_trace_state(const char *val, struct kernel_param *kp)
173 {
174         int result = 0;
175
176         if (!strncmp(val, "enable", strlen("enable") - 1)) {
177                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
178                                           trace_debug_layer, 0);
179                 if (result)
180                         result = -EBUSY;
181                 goto exit;
182         }
183
184         if (!strncmp(val, "disable", strlen("disable") - 1)) {
185                 int name = 0;
186                 result = acpi_debug_trace((char *)&name, trace_debug_level,
187                                           trace_debug_layer, 0);
188                 if (result)
189                         result = -EBUSY;
190                 goto exit;
191         }
192
193         if (!strncmp(val, "1", 1)) {
194                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
195                                           trace_debug_layer, 1);
196                 if (result)
197                         result = -EBUSY;
198                 goto exit;
199         }
200
201         result = -EINVAL;
202 exit:
203         return result;
204 }
205
206 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
207 {
208         if (!acpi_gbl_trace_method_name)
209                 return sprintf(buffer, "disable");
210         else {
211                 if (acpi_gbl_trace_flags & 1)
212                         return sprintf(buffer, "1");
213                 else
214                         return sprintf(buffer, "enable");
215         }
216         return 0;
217 }
218
219 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
220                   NULL, 0644);
221 #endif /* CONFIG_ACPI_DEBUG */
222
223
224 /* /sys/modules/acpi/parameters/aml_debug_output */
225
226 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
227                    bool, 0644);
228 MODULE_PARM_DESC(aml_debug_output,
229                  "To enable/disable the ACPI Debug Object output.");
230
231 /* /sys/module/acpi/parameters/acpica_version */
232 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
233 {
234         int result;
235
236         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
237
238         return result;
239 }
240
241 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
242
243 /*
244  * ACPI table sysfs I/F:
245  * /sys/firmware/acpi/tables/
246  * /sys/firmware/acpi/tables/dynamic/
247  */
248
249 static LIST_HEAD(acpi_table_attr_list);
250 static struct kobject *tables_kobj;
251 static struct kobject *dynamic_tables_kobj;
252
253 struct acpi_table_attr {
254         struct bin_attribute attr;
255         char name[8];
256         int instance;
257         struct list_head node;
258 };
259
260 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
261                                struct bin_attribute *bin_attr, char *buf,
262                                loff_t offset, size_t count)
263 {
264         struct acpi_table_attr *table_attr =
265             container_of(bin_attr, struct acpi_table_attr, attr);
266         struct acpi_table_header *table_header = NULL;
267         acpi_status status;
268         char name[ACPI_NAME_SIZE];
269
270         if (strncmp(table_attr->name, "NULL", 4))
271                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
272         else
273                 memcpy(name, "\0\0\0\0", 4);
274
275         status = acpi_get_table(name, table_attr->instance, &table_header);
276         if (ACPI_FAILURE(status))
277                 return -ENODEV;
278
279         return memory_read_from_buffer(buf, count, &offset,
280                                        table_header, table_header->length);
281 }
282
283 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
284                                  struct acpi_table_header *table_header)
285 {
286         struct acpi_table_header *header = NULL;
287         struct acpi_table_attr *attr = NULL;
288
289         sysfs_attr_init(&table_attr->attr.attr);
290         if (table_header->signature[0] != '\0')
291                 memcpy(table_attr->name, table_header->signature,
292                        ACPI_NAME_SIZE);
293         else
294                 memcpy(table_attr->name, "NULL", 4);
295
296         list_for_each_entry(attr, &acpi_table_attr_list, node) {
297                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
298                         if (table_attr->instance < attr->instance)
299                                 table_attr->instance = attr->instance;
300         }
301         table_attr->instance++;
302
303         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
304                                          !acpi_get_table
305                                          (table_header->signature, 2, &header)))
306                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
307                         table_attr->instance);
308
309         table_attr->attr.size = 0;
310         table_attr->attr.read = acpi_table_show;
311         table_attr->attr.attr.name = table_attr->name;
312         table_attr->attr.attr.mode = 0400;
313
314         return;
315 }
316
317 static acpi_status
318 acpi_sysfs_table_handler(u32 event, void *table, void *context)
319 {
320         struct acpi_table_attr *table_attr;
321
322         switch (event) {
323         case ACPI_TABLE_EVENT_LOAD:
324                 table_attr =
325                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
326                 if (!table_attr)
327                         return AE_NO_MEMORY;
328
329                 acpi_table_attr_init(table_attr, table);
330                 if (sysfs_create_bin_file(dynamic_tables_kobj,
331                                           &table_attr->attr)) {
332                         kfree(table_attr);
333                         return AE_ERROR;
334                 } else
335                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
336                 break;
337         case ACPI_TABLE_EVENT_UNLOAD:
338                 /*
339                  * we do not need to do anything right now
340                  * because the table is not deleted from the
341                  * global table list when unloading it.
342                  */
343                 break;
344         default:
345                 return AE_BAD_PARAMETER;
346         }
347         return AE_OK;
348 }
349
350 static int acpi_tables_sysfs_init(void)
351 {
352         struct acpi_table_attr *table_attr;
353         struct acpi_table_header *table_header = NULL;
354         int table_index = 0;
355         int result;
356
357         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
358         if (!tables_kobj)
359                 goto err;
360
361         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
362         if (!dynamic_tables_kobj)
363                 goto err_dynamic_tables;
364
365         do {
366                 result = acpi_get_table_by_index(table_index, &table_header);
367                 if (!result) {
368                         table_index++;
369                         table_attr = NULL;
370                         table_attr =
371                             kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
372                         if (!table_attr)
373                                 return -ENOMEM;
374
375                         acpi_table_attr_init(table_attr, table_header);
376                         result =
377                             sysfs_create_bin_file(tables_kobj,
378                                                   &table_attr->attr);
379                         if (result) {
380                                 kfree(table_attr);
381                                 return result;
382                         } else
383                                 list_add_tail(&table_attr->node,
384                                               &acpi_table_attr_list);
385                 }
386         } while (!result);
387         kobject_uevent(tables_kobj, KOBJ_ADD);
388         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
389         result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
390
391         return result == AE_OK ? 0 : -EINVAL;
392 err_dynamic_tables:
393         kobject_put(tables_kobj);
394 err:
395         return -ENOMEM;
396 }
397
398 /*
399  * Detailed ACPI IRQ counters:
400  * /sys/firmware/acpi/interrupts/
401  */
402
403 u32 acpi_irq_handled;
404 u32 acpi_irq_not_handled;
405
406 #define COUNT_GPE 0
407 #define COUNT_SCI 1             /* acpi_irq_handled */
408 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
409 #define COUNT_ERROR 3           /* other */
410 #define NUM_COUNTERS_EXTRA 4
411
412 struct event_counter {
413         u32 count;
414         u32 flags;
415 };
416
417 static struct event_counter *all_counters;
418 static u32 num_gpes;
419 static u32 num_counters;
420 static struct attribute **all_attrs;
421 static u32 acpi_gpe_count;
422
423 static struct attribute_group interrupt_stats_attr_group = {
424         .name = "interrupts",
425 };
426
427 static struct kobj_attribute *counter_attrs;
428
429 static void delete_gpe_attr_array(void)
430 {
431         struct event_counter *tmp = all_counters;
432
433         all_counters = NULL;
434         kfree(tmp);
435
436         if (counter_attrs) {
437                 int i;
438
439                 for (i = 0; i < num_gpes; i++)
440                         kfree(counter_attrs[i].attr.name);
441
442                 kfree(counter_attrs);
443         }
444         kfree(all_attrs);
445
446         return;
447 }
448
449 static void gpe_count(u32 gpe_number)
450 {
451         acpi_gpe_count++;
452
453         if (!all_counters)
454                 return;
455
456         if (gpe_number < num_gpes)
457                 all_counters[gpe_number].count++;
458         else
459                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
460                              COUNT_ERROR].count++;
461
462         return;
463 }
464
465 static void fixed_event_count(u32 event_number)
466 {
467         if (!all_counters)
468                 return;
469
470         if (event_number < ACPI_NUM_FIXED_EVENTS)
471                 all_counters[num_gpes + event_number].count++;
472         else
473                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
474                              COUNT_ERROR].count++;
475
476         return;
477 }
478
479 static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
480         u32 event_number, void *context)
481 {
482         if (event_type == ACPI_EVENT_TYPE_GPE)
483                 gpe_count(event_number);
484
485         if (event_type == ACPI_EVENT_TYPE_FIXED)
486                 fixed_event_count(event_number);
487 }
488
489 static int get_status(u32 index, acpi_event_status *status,
490                       acpi_handle *handle)
491 {
492         int result = 0;
493
494         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
495                 goto end;
496
497         if (index < num_gpes) {
498                 result = acpi_get_gpe_device(index, handle);
499                 if (result) {
500                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
501                                         "Invalid GPE 0x%x\n", index));
502                         goto end;
503                 }
504                 result = acpi_get_gpe_status(*handle, index, status);
505         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
506                 result = acpi_get_event_status(index - num_gpes, status);
507
508 end:
509         return result;
510 }
511
512 static ssize_t counter_show(struct kobject *kobj,
513                             struct kobj_attribute *attr, char *buf)
514 {
515         int index = attr - counter_attrs;
516         int size;
517         acpi_handle handle;
518         acpi_event_status status;
519         int result = 0;
520
521         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
522             acpi_irq_handled;
523         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
524             acpi_irq_not_handled;
525         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
526             acpi_gpe_count;
527         size = sprintf(buf, "%8d", all_counters[index].count);
528
529         /* "gpe_all" or "sci" */
530         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
531                 goto end;
532
533         result = get_status(index, &status, &handle);
534         if (result)
535                 goto end;
536
537         if (!(status & ACPI_EVENT_FLAG_HANDLE))
538                 size += sprintf(buf + size, "   invalid");
539         else if (status & ACPI_EVENT_FLAG_ENABLED)
540                 size += sprintf(buf + size, "   enabled");
541         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
542                 size += sprintf(buf + size, "   wake_enabled");
543         else
544                 size += sprintf(buf + size, "   disabled");
545
546 end:
547         size += sprintf(buf + size, "\n");
548         return result ? result : size;
549 }
550
551 /*
552  * counter_set() sets the specified counter.
553  * setting the total "sci" file to any value clears all counters.
554  * enable/disable/clear a gpe/fixed event in user space.
555  */
556 static ssize_t counter_set(struct kobject *kobj,
557                            struct kobj_attribute *attr, const char *buf,
558                            size_t size)
559 {
560         int index = attr - counter_attrs;
561         acpi_event_status status;
562         acpi_handle handle;
563         int result = 0;
564
565         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
566                 int i;
567                 for (i = 0; i < num_counters; ++i)
568                         all_counters[i].count = 0;
569                 acpi_gpe_count = 0;
570                 acpi_irq_handled = 0;
571                 acpi_irq_not_handled = 0;
572                 goto end;
573         }
574
575         /* show the event status for both GPEs and Fixed Events */
576         result = get_status(index, &status, &handle);
577         if (result)
578                 goto end;
579
580         if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
581                 printk(KERN_WARNING PREFIX
582                        "Can not change Invalid GPE/Fixed Event status\n");
583                 return -EINVAL;
584         }
585
586         if (index < num_gpes) {
587                 if (!strcmp(buf, "disable\n") &&
588                     (status & ACPI_EVENT_FLAG_ENABLED))
589                         result = acpi_disable_gpe(handle, index);
590                 else if (!strcmp(buf, "enable\n") &&
591                          !(status & ACPI_EVENT_FLAG_ENABLED))
592                         result = acpi_enable_gpe(handle, index);
593                 else if (!strcmp(buf, "clear\n") &&
594                          (status & ACPI_EVENT_FLAG_SET))
595                         result = acpi_clear_gpe(handle, index);
596                 else
597                         all_counters[index].count = strtoul(buf, NULL, 0);
598         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
599                 int event = index - num_gpes;
600                 if (!strcmp(buf, "disable\n") &&
601                     (status & ACPI_EVENT_FLAG_ENABLED))
602                         result = acpi_disable_event(event, ACPI_NOT_ISR);
603                 else if (!strcmp(buf, "enable\n") &&
604                          !(status & ACPI_EVENT_FLAG_ENABLED))
605                         result = acpi_enable_event(event, ACPI_NOT_ISR);
606                 else if (!strcmp(buf, "clear\n") &&
607                          (status & ACPI_EVENT_FLAG_SET))
608                         result = acpi_clear_event(event);
609                 else
610                         all_counters[index].count = strtoul(buf, NULL, 0);
611         } else
612                 all_counters[index].count = strtoul(buf, NULL, 0);
613
614         if (ACPI_FAILURE(result))
615                 result = -EINVAL;
616 end:
617         return result ? result : size;
618 }
619
620 void acpi_irq_stats_init(void)
621 {
622         acpi_status status;
623         int i;
624
625         if (all_counters)
626                 return;
627
628         num_gpes = acpi_current_gpe_count;
629         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
630
631         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
632                             GFP_KERNEL);
633         if (all_attrs == NULL)
634                 return;
635
636         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
637                                GFP_KERNEL);
638         if (all_counters == NULL)
639                 goto fail;
640
641         status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
642         if (ACPI_FAILURE(status))
643                 goto fail;
644
645         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
646                                 GFP_KERNEL);
647         if (counter_attrs == NULL)
648                 goto fail;
649
650         for (i = 0; i < num_counters; ++i) {
651                 char buffer[12];
652                 char *name;
653
654                 if (i < num_gpes)
655                         sprintf(buffer, "gpe%02X", i);
656                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
657                         sprintf(buffer, "ff_pmtimer");
658                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
659                         sprintf(buffer, "ff_gbl_lock");
660                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
661                         sprintf(buffer, "ff_pwr_btn");
662                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
663                         sprintf(buffer, "ff_slp_btn");
664                 else if (i == num_gpes + ACPI_EVENT_RTC)
665                         sprintf(buffer, "ff_rt_clk");
666                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
667                         sprintf(buffer, "gpe_all");
668                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
669                         sprintf(buffer, "sci");
670                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
671                         sprintf(buffer, "sci_not");
672                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
673                         sprintf(buffer, "error");
674                 else
675                         sprintf(buffer, "bug%02X", i);
676
677                 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
678                 if (name == NULL)
679                         goto fail;
680                 strncpy(name, buffer, strlen(buffer) + 1);
681
682                 sysfs_attr_init(&counter_attrs[i].attr);
683                 counter_attrs[i].attr.name = name;
684                 counter_attrs[i].attr.mode = 0644;
685                 counter_attrs[i].show = counter_show;
686                 counter_attrs[i].store = counter_set;
687
688                 all_attrs[i] = &counter_attrs[i].attr;
689         }
690
691         interrupt_stats_attr_group.attrs = all_attrs;
692         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
693                 return;
694
695 fail:
696         delete_gpe_attr_array();
697         return;
698 }
699
700 static void __exit interrupt_stats_exit(void)
701 {
702         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
703
704         delete_gpe_attr_array();
705
706         return;
707 }
708
709 int __init acpi_sysfs_init(void)
710 {
711         int result;
712
713         result = acpi_tables_sysfs_init();
714
715         return result;
716 }