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Merge remote-tracking branch 'vfio/next'
[deliverable/linux.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 <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 acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
382 {
383 struct acpi_table_attr *table_attr;
384
385 switch (event) {
386 case ACPI_TABLE_EVENT_LOAD:
387 table_attr =
388 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
389 if (!table_attr)
390 return AE_NO_MEMORY;
391
392 acpi_table_attr_init(table_attr, table);
393 if (sysfs_create_bin_file(dynamic_tables_kobj,
394 &table_attr->attr)) {
395 kfree(table_attr);
396 return AE_ERROR;
397 } else
398 list_add_tail(&table_attr->node, &acpi_table_attr_list);
399 break;
400 case ACPI_TABLE_EVENT_UNLOAD:
401 /*
402 * we do not need to do anything right now
403 * because the table is not deleted from the
404 * global table list when unloading it.
405 */
406 break;
407 default:
408 return AE_BAD_PARAMETER;
409 }
410 return AE_OK;
411 }
412
413 static int acpi_tables_sysfs_init(void)
414 {
415 struct acpi_table_attr *table_attr;
416 struct acpi_table_header *table_header = NULL;
417 int table_index;
418 acpi_status status;
419 int ret;
420
421 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
422 if (!tables_kobj)
423 goto err;
424
425 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
426 if (!dynamic_tables_kobj)
427 goto err_dynamic_tables;
428
429 for (table_index = 0;; table_index++) {
430 status = acpi_get_table_by_index(table_index, &table_header);
431
432 if (status == AE_BAD_PARAMETER)
433 break;
434
435 if (ACPI_FAILURE(status))
436 continue;
437
438 table_attr = NULL;
439 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
440 if (!table_attr)
441 return -ENOMEM;
442
443 acpi_table_attr_init(table_attr, table_header);
444 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
445 if (ret) {
446 kfree(table_attr);
447 return ret;
448 }
449 list_add_tail(&table_attr->node, &acpi_table_attr_list);
450 }
451
452 kobject_uevent(tables_kobj, KOBJ_ADD);
453 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
454
455 return 0;
456 err_dynamic_tables:
457 kobject_put(tables_kobj);
458 err:
459 return -ENOMEM;
460 }
461
462 /*
463 * Detailed ACPI IRQ counters:
464 * /sys/firmware/acpi/interrupts/
465 */
466
467 u32 acpi_irq_handled;
468 u32 acpi_irq_not_handled;
469
470 #define COUNT_GPE 0
471 #define COUNT_SCI 1 /* acpi_irq_handled */
472 #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
473 #define COUNT_ERROR 3 /* other */
474 #define NUM_COUNTERS_EXTRA 4
475
476 struct event_counter {
477 u32 count;
478 u32 flags;
479 };
480
481 static struct event_counter *all_counters;
482 static u32 num_gpes;
483 static u32 num_counters;
484 static struct attribute **all_attrs;
485 static u32 acpi_gpe_count;
486
487 static struct attribute_group interrupt_stats_attr_group = {
488 .name = "interrupts",
489 };
490
491 static struct kobj_attribute *counter_attrs;
492
493 static void delete_gpe_attr_array(void)
494 {
495 struct event_counter *tmp = all_counters;
496
497 all_counters = NULL;
498 kfree(tmp);
499
500 if (counter_attrs) {
501 int i;
502
503 for (i = 0; i < num_gpes; i++)
504 kfree(counter_attrs[i].attr.name);
505
506 kfree(counter_attrs);
507 }
508 kfree(all_attrs);
509
510 return;
511 }
512
513 static void gpe_count(u32 gpe_number)
514 {
515 acpi_gpe_count++;
516
517 if (!all_counters)
518 return;
519
520 if (gpe_number < num_gpes)
521 all_counters[gpe_number].count++;
522 else
523 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
524 COUNT_ERROR].count++;
525
526 return;
527 }
528
529 static void fixed_event_count(u32 event_number)
530 {
531 if (!all_counters)
532 return;
533
534 if (event_number < ACPI_NUM_FIXED_EVENTS)
535 all_counters[num_gpes + event_number].count++;
536 else
537 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
538 COUNT_ERROR].count++;
539
540 return;
541 }
542
543 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
544 u32 event_number, void *context)
545 {
546 if (event_type == ACPI_EVENT_TYPE_GPE)
547 gpe_count(event_number);
548
549 if (event_type == ACPI_EVENT_TYPE_FIXED)
550 fixed_event_count(event_number);
551 }
552
553 static int get_status(u32 index, acpi_event_status *status,
554 acpi_handle *handle)
555 {
556 int result;
557
558 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
559 return -EINVAL;
560
561 if (index < num_gpes) {
562 result = acpi_get_gpe_device(index, handle);
563 if (result) {
564 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
565 "Invalid GPE 0x%x", index));
566 return result;
567 }
568 result = acpi_get_gpe_status(*handle, index, status);
569 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
570 result = acpi_get_event_status(index - num_gpes, status);
571
572 return result;
573 }
574
575 static ssize_t counter_show(struct kobject *kobj,
576 struct kobj_attribute *attr, char *buf)
577 {
578 int index = attr - counter_attrs;
579 int size;
580 acpi_handle handle;
581 acpi_event_status status;
582 int result = 0;
583
584 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
585 acpi_irq_handled;
586 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
587 acpi_irq_not_handled;
588 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
589 acpi_gpe_count;
590 size = sprintf(buf, "%8u", all_counters[index].count);
591
592 /* "gpe_all" or "sci" */
593 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
594 goto end;
595
596 result = get_status(index, &status, &handle);
597 if (result)
598 goto end;
599
600 if (status & ACPI_EVENT_FLAG_ENABLE_SET)
601 size += sprintf(buf + size, " EN");
602 else
603 size += sprintf(buf + size, " ");
604 if (status & ACPI_EVENT_FLAG_STATUS_SET)
605 size += sprintf(buf + size, " STS");
606 else
607 size += sprintf(buf + size, " ");
608
609 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
610 size += sprintf(buf + size, " invalid ");
611 else if (status & ACPI_EVENT_FLAG_ENABLED)
612 size += sprintf(buf + size, " enabled ");
613 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
614 size += sprintf(buf + size, " wake_enabled");
615 else
616 size += sprintf(buf + size, " disabled ");
617 if (status & ACPI_EVENT_FLAG_MASKED)
618 size += sprintf(buf + size, " masked ");
619 else
620 size += sprintf(buf + size, " unmasked");
621
622 end:
623 size += sprintf(buf + size, "\n");
624 return result ? result : size;
625 }
626
627 /*
628 * counter_set() sets the specified counter.
629 * setting the total "sci" file to any value clears all counters.
630 * enable/disable/clear a gpe/fixed event in user space.
631 */
632 static ssize_t counter_set(struct kobject *kobj,
633 struct kobj_attribute *attr, const char *buf,
634 size_t size)
635 {
636 int index = attr - counter_attrs;
637 acpi_event_status status;
638 acpi_handle handle;
639 int result = 0;
640 unsigned long tmp;
641
642 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
643 int i;
644 for (i = 0; i < num_counters; ++i)
645 all_counters[i].count = 0;
646 acpi_gpe_count = 0;
647 acpi_irq_handled = 0;
648 acpi_irq_not_handled = 0;
649 goto end;
650 }
651
652 /* show the event status for both GPEs and Fixed Events */
653 result = get_status(index, &status, &handle);
654 if (result)
655 goto end;
656
657 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
658 printk(KERN_WARNING PREFIX
659 "Can not change Invalid GPE/Fixed Event status\n");
660 return -EINVAL;
661 }
662
663 if (index < num_gpes) {
664 if (!strcmp(buf, "disable\n") &&
665 (status & ACPI_EVENT_FLAG_ENABLED))
666 result = acpi_disable_gpe(handle, index);
667 else if (!strcmp(buf, "enable\n") &&
668 !(status & ACPI_EVENT_FLAG_ENABLED))
669 result = acpi_enable_gpe(handle, index);
670 else if (!strcmp(buf, "clear\n") &&
671 (status & ACPI_EVENT_FLAG_STATUS_SET))
672 result = acpi_clear_gpe(handle, index);
673 else if (!strcmp(buf, "mask\n"))
674 result = acpi_mask_gpe(handle, index, TRUE);
675 else if (!strcmp(buf, "unmask\n"))
676 result = acpi_mask_gpe(handle, index, FALSE);
677 else if (!kstrtoul(buf, 0, &tmp))
678 all_counters[index].count = tmp;
679 else
680 result = -EINVAL;
681 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
682 int event = index - num_gpes;
683 if (!strcmp(buf, "disable\n") &&
684 (status & ACPI_EVENT_FLAG_ENABLE_SET))
685 result = acpi_disable_event(event, ACPI_NOT_ISR);
686 else if (!strcmp(buf, "enable\n") &&
687 !(status & ACPI_EVENT_FLAG_ENABLE_SET))
688 result = acpi_enable_event(event, ACPI_NOT_ISR);
689 else if (!strcmp(buf, "clear\n") &&
690 (status & ACPI_EVENT_FLAG_STATUS_SET))
691 result = acpi_clear_event(event);
692 else if (!kstrtoul(buf, 0, &tmp))
693 all_counters[index].count = tmp;
694 else
695 result = -EINVAL;
696 } else
697 all_counters[index].count = strtoul(buf, NULL, 0);
698
699 if (ACPI_FAILURE(result))
700 result = -EINVAL;
701 end:
702 return result ? result : size;
703 }
704
705 void acpi_irq_stats_init(void)
706 {
707 acpi_status status;
708 int i;
709
710 if (all_counters)
711 return;
712
713 num_gpes = acpi_current_gpe_count;
714 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
715
716 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
717 GFP_KERNEL);
718 if (all_attrs == NULL)
719 return;
720
721 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
722 GFP_KERNEL);
723 if (all_counters == NULL)
724 goto fail;
725
726 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
727 if (ACPI_FAILURE(status))
728 goto fail;
729
730 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
731 GFP_KERNEL);
732 if (counter_attrs == NULL)
733 goto fail;
734
735 for (i = 0; i < num_counters; ++i) {
736 char buffer[12];
737 char *name;
738
739 if (i < num_gpes)
740 sprintf(buffer, "gpe%02X", i);
741 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
742 sprintf(buffer, "ff_pmtimer");
743 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
744 sprintf(buffer, "ff_gbl_lock");
745 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
746 sprintf(buffer, "ff_pwr_btn");
747 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
748 sprintf(buffer, "ff_slp_btn");
749 else if (i == num_gpes + ACPI_EVENT_RTC)
750 sprintf(buffer, "ff_rt_clk");
751 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
752 sprintf(buffer, "gpe_all");
753 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
754 sprintf(buffer, "sci");
755 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
756 sprintf(buffer, "sci_not");
757 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
758 sprintf(buffer, "error");
759 else
760 sprintf(buffer, "bug%02X", i);
761
762 name = kstrdup(buffer, GFP_KERNEL);
763 if (name == NULL)
764 goto fail;
765
766 sysfs_attr_init(&counter_attrs[i].attr);
767 counter_attrs[i].attr.name = name;
768 counter_attrs[i].attr.mode = 0644;
769 counter_attrs[i].show = counter_show;
770 counter_attrs[i].store = counter_set;
771
772 all_attrs[i] = &counter_attrs[i].attr;
773 }
774
775 interrupt_stats_attr_group.attrs = all_attrs;
776 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
777 return;
778
779 fail:
780 delete_gpe_attr_array();
781 return;
782 }
783
784 static void __exit interrupt_stats_exit(void)
785 {
786 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
787
788 delete_gpe_attr_array();
789
790 return;
791 }
792
793 static ssize_t
794 acpi_show_profile(struct device *dev, struct device_attribute *attr,
795 char *buf)
796 {
797 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
798 }
799
800 static const struct device_attribute pm_profile_attr =
801 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
802
803 static ssize_t hotplug_enabled_show(struct kobject *kobj,
804 struct kobj_attribute *attr, char *buf)
805 {
806 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
807
808 return sprintf(buf, "%d\n", hotplug->enabled);
809 }
810
811 static ssize_t hotplug_enabled_store(struct kobject *kobj,
812 struct kobj_attribute *attr,
813 const char *buf, size_t size)
814 {
815 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
816 unsigned int val;
817
818 if (kstrtouint(buf, 10, &val) || val > 1)
819 return -EINVAL;
820
821 acpi_scan_hotplug_enabled(hotplug, val);
822 return size;
823 }
824
825 static struct kobj_attribute hotplug_enabled_attr =
826 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
827 hotplug_enabled_store);
828
829 static struct attribute *hotplug_profile_attrs[] = {
830 &hotplug_enabled_attr.attr,
831 NULL
832 };
833
834 static struct kobj_type acpi_hotplug_profile_ktype = {
835 .sysfs_ops = &kobj_sysfs_ops,
836 .default_attrs = hotplug_profile_attrs,
837 };
838
839 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
840 const char *name)
841 {
842 int error;
843
844 if (!hotplug_kobj)
845 goto err_out;
846
847 error = kobject_init_and_add(&hotplug->kobj,
848 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
849 if (error)
850 goto err_out;
851
852 kobject_uevent(&hotplug->kobj, KOBJ_ADD);
853 return;
854
855 err_out:
856 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
857 }
858
859 static ssize_t force_remove_show(struct kobject *kobj,
860 struct kobj_attribute *attr, char *buf)
861 {
862 return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
863 }
864
865 static ssize_t force_remove_store(struct kobject *kobj,
866 struct kobj_attribute *attr,
867 const char *buf, size_t size)
868 {
869 bool val;
870 int ret;
871
872 ret = strtobool(buf, &val);
873 if (ret < 0)
874 return ret;
875
876 lock_device_hotplug();
877 acpi_force_hot_remove = val;
878 unlock_device_hotplug();
879 return size;
880 }
881
882 static const struct kobj_attribute force_remove_attr =
883 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
884 force_remove_store);
885
886 int __init acpi_sysfs_init(void)
887 {
888 int result;
889
890 result = acpi_tables_sysfs_init();
891 if (result)
892 return result;
893
894 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
895 if (!hotplug_kobj)
896 return -ENOMEM;
897
898 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
899 if (result)
900 return result;
901
902 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
903 return result;
904 }
Linux kernel - Deliverables
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