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[kvmfornfv.git] / kernel / 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 <linux/acpi.h>
9
10 #include "internal.h"
11
12 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
13 ACPI_MODULE_NAME("sysfs");
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         ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
73         ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
74
75         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
76         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
77         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
78         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
79         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
80         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
81         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
82         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
83         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
84         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
85         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
86         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
87         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
88         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
89
90         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
91         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
92         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
93
94         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
95         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
96         ACPI_DEBUG_INIT(ACPI_LV_IO),
97         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
98
99         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
100         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
101         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
102         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
103 };
104
105 static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
106 {
107         int result = 0;
108         int i;
109
110         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
111
112         for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
113                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
114                                   acpi_debug_layers[i].name,
115                                   acpi_debug_layers[i].value,
116                                   (acpi_dbg_layer & acpi_debug_layers[i].value)
117                                   ? '*' : ' ');
118         }
119         result +=
120             sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
121                     ACPI_ALL_DRIVERS,
122                     (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
123                     ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
124                     == 0 ? ' ' : '-');
125         result +=
126             sprintf(buffer + result,
127                     "--\ndebug_layer = 0x%08X ( * = enabled)\n",
128                     acpi_dbg_layer);
129
130         return result;
131 }
132
133 static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
134 {
135         int result = 0;
136         int i;
137
138         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
139
140         for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
141                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
142                                   acpi_debug_levels[i].name,
143                                   acpi_debug_levels[i].value,
144                                   (acpi_dbg_level & acpi_debug_levels[i].value)
145                                   ? '*' : ' ');
146         }
147         result +=
148             sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
149                     acpi_dbg_level);
150
151         return result;
152 }
153
154 static const struct kernel_param_ops param_ops_debug_layer = {
155         .set = param_set_uint,
156         .get = param_get_debug_layer,
157 };
158
159 static const struct kernel_param_ops param_ops_debug_level = {
160         .set = param_set_uint,
161         .get = param_get_debug_level,
162 };
163
164 module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
165 module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
166
167 static char trace_method_name[1024];
168
169 int param_set_trace_method_name(const char *val, const struct kernel_param *kp)
170 {
171         u32 saved_flags = 0;
172         bool is_abs_path = true;
173
174         if (*val != '\\')
175                 is_abs_path = false;
176
177         if ((is_abs_path && strlen(val) > 1023) ||
178             (!is_abs_path && strlen(val) > 1022)) {
179                 pr_err("%s: string parameter too long\n", kp->name);
180                 return -ENOSPC;
181         }
182
183         /*
184          * It's not safe to update acpi_gbl_trace_method_name without
185          * having the tracer stopped, so we save the original tracer
186          * state and disable it.
187          */
188         saved_flags = acpi_gbl_trace_flags;
189         (void)acpi_debug_trace(NULL,
190                                acpi_gbl_trace_dbg_level,
191                                acpi_gbl_trace_dbg_layer,
192                                0);
193
194         /* This is a hack.  We can't kmalloc in early boot. */
195         if (is_abs_path)
196                 strcpy(trace_method_name, val);
197         else {
198                 trace_method_name[0] = '\\';
199                 strcpy(trace_method_name+1, val);
200         }
201
202         /* Restore the original tracer state */
203         (void)acpi_debug_trace(trace_method_name,
204                                acpi_gbl_trace_dbg_level,
205                                acpi_gbl_trace_dbg_layer,
206                                saved_flags);
207
208         return 0;
209 }
210
211 static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp)
212 {
213         return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name);
214 }
215
216 static const struct kernel_param_ops param_ops_trace_method = {
217         .set = param_set_trace_method_name,
218         .get = param_get_trace_method_name,
219 };
220
221 static const struct kernel_param_ops param_ops_trace_attrib = {
222         .set = param_set_uint,
223         .get = param_get_uint,
224 };
225
226 module_param_cb(trace_method_name, &param_ops_trace_method, &trace_method_name, 0644);
227 module_param_cb(trace_debug_layer, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
228 module_param_cb(trace_debug_level, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644);
229
230 static int param_set_trace_state(const char *val, struct kernel_param *kp)
231 {
232         acpi_status status;
233         const char *method = trace_method_name;
234         u32 flags = 0;
235
236 /* So "xxx-once" comparison should go prior than "xxx" comparison */
237 #define acpi_compare_param(val, key)    \
238         strncmp((val), (key), sizeof(key) - 1)
239
240         if (!acpi_compare_param(val, "enable")) {
241                 method = NULL;
242                 flags = ACPI_TRACE_ENABLED;
243         } else if (!acpi_compare_param(val, "disable"))
244                 method = NULL;
245         else if (!acpi_compare_param(val, "method-once"))
246                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT;
247         else if (!acpi_compare_param(val, "method"))
248                 flags = ACPI_TRACE_ENABLED;
249         else if (!acpi_compare_param(val, "opcode-once"))
250                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE;
251         else if (!acpi_compare_param(val, "opcode"))
252                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE;
253         else
254                 return -EINVAL;
255
256         status = acpi_debug_trace(method,
257                                   acpi_gbl_trace_dbg_level,
258                                   acpi_gbl_trace_dbg_layer,
259                                   flags);
260         if (ACPI_FAILURE(status))
261                 return -EBUSY;
262
263         return 0;
264 }
265
266 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
267 {
268         if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
269                 return sprintf(buffer, "disable");
270         else {
271                 if (acpi_gbl_trace_method_name) {
272                         if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
273                                 return sprintf(buffer, "method-once");
274                         else
275                                 return sprintf(buffer, "method");
276                 } else
277                         return sprintf(buffer, "enable");
278         }
279         return 0;
280 }
281
282 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
283                   NULL, 0644);
284 #endif /* CONFIG_ACPI_DEBUG */
285
286
287 /* /sys/modules/acpi/parameters/aml_debug_output */
288
289 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
290                    byte, 0644);
291 MODULE_PARM_DESC(aml_debug_output,
292                  "To enable/disable the ACPI Debug Object output.");
293
294 /* /sys/module/acpi/parameters/acpica_version */
295 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
296 {
297         int result;
298
299         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
300
301         return result;
302 }
303
304 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
305
306 /*
307  * ACPI table sysfs I/F:
308  * /sys/firmware/acpi/tables/
309  * /sys/firmware/acpi/tables/dynamic/
310  */
311
312 static LIST_HEAD(acpi_table_attr_list);
313 static struct kobject *tables_kobj;
314 static struct kobject *dynamic_tables_kobj;
315 static struct kobject *hotplug_kobj;
316
317 struct acpi_table_attr {
318         struct bin_attribute attr;
319         char name[8];
320         int instance;
321         struct list_head node;
322 };
323
324 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
325                                struct bin_attribute *bin_attr, char *buf,
326                                loff_t offset, size_t count)
327 {
328         struct acpi_table_attr *table_attr =
329             container_of(bin_attr, struct acpi_table_attr, attr);
330         struct acpi_table_header *table_header = NULL;
331         acpi_status status;
332         char name[ACPI_NAME_SIZE];
333
334         if (strncmp(table_attr->name, "NULL", 4))
335                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
336         else
337                 memcpy(name, "\0\0\0\0", 4);
338
339         status = acpi_get_table(name, table_attr->instance, &table_header);
340         if (ACPI_FAILURE(status))
341                 return -ENODEV;
342
343         return memory_read_from_buffer(buf, count, &offset,
344                                        table_header, table_header->length);
345 }
346
347 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
348                                  struct acpi_table_header *table_header)
349 {
350         struct acpi_table_header *header = NULL;
351         struct acpi_table_attr *attr = NULL;
352
353         sysfs_attr_init(&table_attr->attr.attr);
354         if (table_header->signature[0] != '\0')
355                 memcpy(table_attr->name, table_header->signature,
356                        ACPI_NAME_SIZE);
357         else
358                 memcpy(table_attr->name, "NULL", 4);
359
360         list_for_each_entry(attr, &acpi_table_attr_list, node) {
361                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
362                         if (table_attr->instance < attr->instance)
363                                 table_attr->instance = attr->instance;
364         }
365         table_attr->instance++;
366
367         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
368                                          !acpi_get_table
369                                          (table_header->signature, 2, &header)))
370                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
371                         table_attr->instance);
372
373         table_attr->attr.size = table_header->length;
374         table_attr->attr.read = acpi_table_show;
375         table_attr->attr.attr.name = table_attr->name;
376         table_attr->attr.attr.mode = 0400;
377
378         return;
379 }
380
381 static acpi_status
382 acpi_sysfs_table_handler(u32 event, void *table, void *context)
383 {
384         struct acpi_table_attr *table_attr;
385
386         switch (event) {
387         case ACPI_TABLE_EVENT_LOAD:
388                 table_attr =
389                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
390                 if (!table_attr)
391                         return AE_NO_MEMORY;
392
393                 acpi_table_attr_init(table_attr, table);
394                 if (sysfs_create_bin_file(dynamic_tables_kobj,
395                                           &table_attr->attr)) {
396                         kfree(table_attr);
397                         return AE_ERROR;
398                 } else
399                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
400                 break;
401         case ACPI_TABLE_EVENT_UNLOAD:
402                 /*
403                  * we do not need to do anything right now
404                  * because the table is not deleted from the
405                  * global table list when unloading it.
406                  */
407                 break;
408         default:
409                 return AE_BAD_PARAMETER;
410         }
411         return AE_OK;
412 }
413
414 static int acpi_tables_sysfs_init(void)
415 {
416         struct acpi_table_attr *table_attr;
417         struct acpi_table_header *table_header = NULL;
418         int table_index;
419         acpi_status status;
420         int ret;
421
422         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
423         if (!tables_kobj)
424                 goto err;
425
426         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
427         if (!dynamic_tables_kobj)
428                 goto err_dynamic_tables;
429
430         for (table_index = 0;; table_index++) {
431                 status = acpi_get_table_by_index(table_index, &table_header);
432
433                 if (status == AE_BAD_PARAMETER)
434                         break;
435
436                 if (ACPI_FAILURE(status))
437                         continue;
438
439                 table_attr = NULL;
440                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
441                 if (!table_attr)
442                         return -ENOMEM;
443
444                 acpi_table_attr_init(table_attr, table_header);
445                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
446                 if (ret) {
447                         kfree(table_attr);
448                         return ret;
449                 }
450                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
451         }
452
453         kobject_uevent(tables_kobj, KOBJ_ADD);
454         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
455         status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
456
457         return ACPI_FAILURE(status) ? -EINVAL : 0;
458 err_dynamic_tables:
459         kobject_put(tables_kobj);
460 err:
461         return -ENOMEM;
462 }
463
464 /*
465  * Detailed ACPI IRQ counters:
466  * /sys/firmware/acpi/interrupts/
467  */
468
469 u32 acpi_irq_handled;
470 u32 acpi_irq_not_handled;
471
472 #define COUNT_GPE 0
473 #define COUNT_SCI 1             /* acpi_irq_handled */
474 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
475 #define COUNT_ERROR 3           /* other */
476 #define NUM_COUNTERS_EXTRA 4
477
478 struct event_counter {
479         u32 count;
480         u32 flags;
481 };
482
483 static struct event_counter *all_counters;
484 static u32 num_gpes;
485 static u32 num_counters;
486 static struct attribute **all_attrs;
487 static u32 acpi_gpe_count;
488
489 static struct attribute_group interrupt_stats_attr_group = {
490         .name = "interrupts",
491 };
492
493 static struct kobj_attribute *counter_attrs;
494
495 static void delete_gpe_attr_array(void)
496 {
497         struct event_counter *tmp = all_counters;
498
499         all_counters = NULL;
500         kfree(tmp);
501
502         if (counter_attrs) {
503                 int i;
504
505                 for (i = 0; i < num_gpes; i++)
506                         kfree(counter_attrs[i].attr.name);
507
508                 kfree(counter_attrs);
509         }
510         kfree(all_attrs);
511
512         return;
513 }
514
515 static void gpe_count(u32 gpe_number)
516 {
517         acpi_gpe_count++;
518
519         if (!all_counters)
520                 return;
521
522         if (gpe_number < num_gpes)
523                 all_counters[gpe_number].count++;
524         else
525                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
526                              COUNT_ERROR].count++;
527
528         return;
529 }
530
531 static void fixed_event_count(u32 event_number)
532 {
533         if (!all_counters)
534                 return;
535
536         if (event_number < ACPI_NUM_FIXED_EVENTS)
537                 all_counters[num_gpes + event_number].count++;
538         else
539                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
540                              COUNT_ERROR].count++;
541
542         return;
543 }
544
545 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
546         u32 event_number, void *context)
547 {
548         if (event_type == ACPI_EVENT_TYPE_GPE)
549                 gpe_count(event_number);
550
551         if (event_type == ACPI_EVENT_TYPE_FIXED)
552                 fixed_event_count(event_number);
553 }
554
555 static int get_status(u32 index, acpi_event_status *status,
556                       acpi_handle *handle)
557 {
558         int result;
559
560         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
561                 return -EINVAL;
562
563         if (index < num_gpes) {
564                 result = acpi_get_gpe_device(index, handle);
565                 if (result) {
566                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
567                                         "Invalid GPE 0x%x", index));
568                         return result;
569                 }
570                 result = acpi_get_gpe_status(*handle, index, status);
571         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
572                 result = acpi_get_event_status(index - num_gpes, status);
573
574         return result;
575 }
576
577 static ssize_t counter_show(struct kobject *kobj,
578                             struct kobj_attribute *attr, char *buf)
579 {
580         int index = attr - counter_attrs;
581         int size;
582         acpi_handle handle;
583         acpi_event_status status;
584         int result = 0;
585
586         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
587             acpi_irq_handled;
588         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
589             acpi_irq_not_handled;
590         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
591             acpi_gpe_count;
592         size = sprintf(buf, "%8u", all_counters[index].count);
593
594         /* "gpe_all" or "sci" */
595         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
596                 goto end;
597
598         result = get_status(index, &status, &handle);
599         if (result)
600                 goto end;
601
602         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
603                 size += sprintf(buf + size, "   invalid");
604         else if (status & ACPI_EVENT_FLAG_ENABLED)
605                 size += sprintf(buf + size, "   enabled");
606         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
607                 size += sprintf(buf + size, "   wake_enabled");
608         else
609                 size += sprintf(buf + size, "   disabled");
610
611 end:
612         size += sprintf(buf + size, "\n");
613         return result ? result : size;
614 }
615
616 /*
617  * counter_set() sets the specified counter.
618  * setting the total "sci" file to any value clears all counters.
619  * enable/disable/clear a gpe/fixed event in user space.
620  */
621 static ssize_t counter_set(struct kobject *kobj,
622                            struct kobj_attribute *attr, const char *buf,
623                            size_t size)
624 {
625         int index = attr - counter_attrs;
626         acpi_event_status status;
627         acpi_handle handle;
628         int result = 0;
629         unsigned long tmp;
630
631         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
632                 int i;
633                 for (i = 0; i < num_counters; ++i)
634                         all_counters[i].count = 0;
635                 acpi_gpe_count = 0;
636                 acpi_irq_handled = 0;
637                 acpi_irq_not_handled = 0;
638                 goto end;
639         }
640
641         /* show the event status for both GPEs and Fixed Events */
642         result = get_status(index, &status, &handle);
643         if (result)
644                 goto end;
645
646         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
647                 printk(KERN_WARNING PREFIX
648                        "Can not change Invalid GPE/Fixed Event status\n");
649                 return -EINVAL;
650         }
651
652         if (index < num_gpes) {
653                 if (!strcmp(buf, "disable\n") &&
654                     (status & ACPI_EVENT_FLAG_ENABLED))
655                         result = acpi_disable_gpe(handle, index);
656                 else if (!strcmp(buf, "enable\n") &&
657                          !(status & ACPI_EVENT_FLAG_ENABLED))
658                         result = acpi_enable_gpe(handle, index);
659                 else if (!strcmp(buf, "clear\n") &&
660                          (status & ACPI_EVENT_FLAG_SET))
661                         result = acpi_clear_gpe(handle, index);
662                 else if (!kstrtoul(buf, 0, &tmp))
663                         all_counters[index].count = tmp;
664                 else
665                         result = -EINVAL;
666         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
667                 int event = index - num_gpes;
668                 if (!strcmp(buf, "disable\n") &&
669                     (status & ACPI_EVENT_FLAG_ENABLED))
670                         result = acpi_disable_event(event, ACPI_NOT_ISR);
671                 else if (!strcmp(buf, "enable\n") &&
672                          !(status & ACPI_EVENT_FLAG_ENABLED))
673                         result = acpi_enable_event(event, ACPI_NOT_ISR);
674                 else if (!strcmp(buf, "clear\n") &&
675                          (status & ACPI_EVENT_FLAG_SET))
676                         result = acpi_clear_event(event);
677                 else if (!kstrtoul(buf, 0, &tmp))
678                         all_counters[index].count = tmp;
679                 else
680                         result = -EINVAL;
681         } else
682                 all_counters[index].count = strtoul(buf, NULL, 0);
683
684         if (ACPI_FAILURE(result))
685                 result = -EINVAL;
686 end:
687         return result ? result : size;
688 }
689
690 void acpi_irq_stats_init(void)
691 {
692         acpi_status status;
693         int i;
694
695         if (all_counters)
696                 return;
697
698         num_gpes = acpi_current_gpe_count;
699         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
700
701         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
702                             GFP_KERNEL);
703         if (all_attrs == NULL)
704                 return;
705
706         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
707                                GFP_KERNEL);
708         if (all_counters == NULL)
709                 goto fail;
710
711         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
712         if (ACPI_FAILURE(status))
713                 goto fail;
714
715         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
716                                 GFP_KERNEL);
717         if (counter_attrs == NULL)
718                 goto fail;
719
720         for (i = 0; i < num_counters; ++i) {
721                 char buffer[12];
722                 char *name;
723
724                 if (i < num_gpes)
725                         sprintf(buffer, "gpe%02X", i);
726                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
727                         sprintf(buffer, "ff_pmtimer");
728                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
729                         sprintf(buffer, "ff_gbl_lock");
730                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
731                         sprintf(buffer, "ff_pwr_btn");
732                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
733                         sprintf(buffer, "ff_slp_btn");
734                 else if (i == num_gpes + ACPI_EVENT_RTC)
735                         sprintf(buffer, "ff_rt_clk");
736                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
737                         sprintf(buffer, "gpe_all");
738                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
739                         sprintf(buffer, "sci");
740                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
741                         sprintf(buffer, "sci_not");
742                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
743                         sprintf(buffer, "error");
744                 else
745                         sprintf(buffer, "bug%02X", i);
746
747                 name = kstrdup(buffer, GFP_KERNEL);
748                 if (name == NULL)
749                         goto fail;
750
751                 sysfs_attr_init(&counter_attrs[i].attr);
752                 counter_attrs[i].attr.name = name;
753                 counter_attrs[i].attr.mode = 0644;
754                 counter_attrs[i].show = counter_show;
755                 counter_attrs[i].store = counter_set;
756
757                 all_attrs[i] = &counter_attrs[i].attr;
758         }
759
760         interrupt_stats_attr_group.attrs = all_attrs;
761         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
762                 return;
763
764 fail:
765         delete_gpe_attr_array();
766         return;
767 }
768
769 static void __exit interrupt_stats_exit(void)
770 {
771         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
772
773         delete_gpe_attr_array();
774
775         return;
776 }
777
778 static ssize_t
779 acpi_show_profile(struct device *dev, struct device_attribute *attr,
780                   char *buf)
781 {
782         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
783 }
784
785 static const struct device_attribute pm_profile_attr =
786         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
787
788 static ssize_t hotplug_enabled_show(struct kobject *kobj,
789                                     struct kobj_attribute *attr, char *buf)
790 {
791         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
792
793         return sprintf(buf, "%d\n", hotplug->enabled);
794 }
795
796 static ssize_t hotplug_enabled_store(struct kobject *kobj,
797                                      struct kobj_attribute *attr,
798                                      const char *buf, size_t size)
799 {
800         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
801         unsigned int val;
802
803         if (kstrtouint(buf, 10, &val) || val > 1)
804                 return -EINVAL;
805
806         acpi_scan_hotplug_enabled(hotplug, val);
807         return size;
808 }
809
810 static struct kobj_attribute hotplug_enabled_attr =
811         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
812                 hotplug_enabled_store);
813
814 static struct attribute *hotplug_profile_attrs[] = {
815         &hotplug_enabled_attr.attr,
816         NULL
817 };
818
819 static struct kobj_type acpi_hotplug_profile_ktype = {
820         .sysfs_ops = &kobj_sysfs_ops,
821         .default_attrs = hotplug_profile_attrs,
822 };
823
824 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
825                                     const char *name)
826 {
827         int error;
828
829         if (!hotplug_kobj)
830                 goto err_out;
831
832         error = kobject_init_and_add(&hotplug->kobj,
833                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
834         if (error)
835                 goto err_out;
836
837         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
838         return;
839
840  err_out:
841         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
842 }
843
844 static ssize_t force_remove_show(struct kobject *kobj,
845                                  struct kobj_attribute *attr, char *buf)
846 {
847         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
848 }
849
850 static ssize_t force_remove_store(struct kobject *kobj,
851                                   struct kobj_attribute *attr,
852                                   const char *buf, size_t size)
853 {
854         bool val;
855         int ret;
856
857         ret = strtobool(buf, &val);
858         if (ret < 0)
859                 return ret;
860
861         lock_device_hotplug();
862         acpi_force_hot_remove = val;
863         unlock_device_hotplug();
864         return size;
865 }
866
867 static const struct kobj_attribute force_remove_attr =
868         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
869                force_remove_store);
870
871 int __init acpi_sysfs_init(void)
872 {
873         int result;
874
875         result = acpi_tables_sysfs_init();
876         if (result)
877                 return result;
878
879         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
880         if (!hotplug_kobj)
881                 return -ENOMEM;
882
883         result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
884         if (result)
885                 return result;
886
887         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
888         return result;
889 }