Root/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
11ACPI_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
26struct acpi_dlayer {
27    const char *name;
28    unsigned long value;
29};
30struct acpi_dlevel {
31    const char *name;
32    unsigned long value;
33};
34#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
35
36static 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
68static 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
103static 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
131static 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
152static const struct kernel_param_ops param_ops_debug_layer = {
153    .set = param_set_uint,
154    .get = param_get_debug_layer,
155};
156
157static const struct kernel_param_ops param_ops_debug_level = {
158    .set = param_set_uint,
159    .get = param_get_debug_level,
160};
161
162module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
163module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
164
165static char trace_method_name[6];
166module_param_string(trace_method_name, trace_method_name, 6, 0644);
167static unsigned int trace_debug_layer;
168module_param(trace_debug_layer, uint, 0644);
169static unsigned int trace_debug_level;
170module_param(trace_debug_level, uint, 0644);
171
172static int param_set_trace_state(const char *val, struct kernel_param *kp)
173{
174    int result = 0;
175
176    if (!strncmp(val, "enable", sizeof("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", sizeof("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;
202exit:
203    return result;
204}
205
206static 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
219module_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
226module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
227           bool, 0644);
228MODULE_PARM_DESC(aml_debug_output,
229         "To enable/disable the ACPI Debug Object output.");
230
231/* /sys/module/acpi/parameters/acpica_version */
232static 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
241module_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
249static LIST_HEAD(acpi_table_attr_list);
250static struct kobject *tables_kobj;
251static struct kobject *dynamic_tables_kobj;
252
253struct acpi_table_attr {
254    struct bin_attribute attr;
255    char name[8];
256    int instance;
257    struct list_head node;
258};
259
260static 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
283static 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
317static acpi_status
318acpi_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
350static 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;
392err_dynamic_tables:
393    kobject_put(tables_kobj);
394err:
395    return -ENOMEM;
396}
397
398/*
399 * Detailed ACPI IRQ counters:
400 * /sys/firmware/acpi/interrupts/
401 */
402
403u32 acpi_irq_handled;
404u32 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
412struct event_counter {
413    u32 count;
414    u32 flags;
415};
416
417static struct event_counter *all_counters;
418static u32 num_gpes;
419static u32 num_counters;
420static struct attribute **all_attrs;
421static u32 acpi_gpe_count;
422
423static struct attribute_group interrupt_stats_attr_group = {
424    .name = "interrupts",
425};
426
427static struct kobj_attribute *counter_attrs;
428
429static 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
449static 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
465static 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
479static 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
489static 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
508end:
509    return result;
510}
511
512static 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
546end:
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 */
556static 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;
616end:
617    return result ? result : size;
618}
619
620void 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
695fail:
696    delete_gpe_attr_array();
697    return;
698}
699
700static 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
709static ssize_t
710acpi_show_profile(struct device *dev, struct device_attribute *attr,
711          char *buf)
712{
713    return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
714}
715
716static const struct device_attribute pm_profile_attr =
717    __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
718
719int __init acpi_sysfs_init(void)
720{
721    int result;
722
723    result = acpi_tables_sysfs_init();
724    if (result)
725        return result;
726    result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
727    return result;
728}
729

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