projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'omap-for-v4.8/legacy' into for-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_HAS_HANDLER))
601 size += sprintf(buf + size, " invalid");
602 else if (status & ACPI_EVENT_FLAG_ENABLED)
603 size += sprintf(buf + size, " enabled");
604 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
605 size += sprintf(buf + size, " wake_enabled");
606 else
607 size += sprintf(buf + size, " disabled");
608
609 end:
610 size += sprintf(buf + size, "\n");
611 return result ? result : size;
612 }
613
614 /*
615 * counter_set() sets the specified counter.
616 * setting the total "sci" file to any value clears all counters.
617 * enable/disable/clear a gpe/fixed event in user space.
618 */
619 static ssize_t counter_set(struct kobject *kobj,
620 struct kobj_attribute *attr, const char *buf,
621 size_t size)
622 {
623 int index = attr - counter_attrs;
624 acpi_event_status status;
625 acpi_handle handle;
626 int result = 0;
627 unsigned long tmp;
628
629 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
630 int i;
631 for (i = 0; i < num_counters; ++i)
632 all_counters[i].count = 0;
633 acpi_gpe_count = 0;
634 acpi_irq_handled = 0;
635 acpi_irq_not_handled = 0;
636 goto end;
637 }
638
639 /* show the event status for both GPEs and Fixed Events */
640 result = get_status(index, &status, &handle);
641 if (result)
642 goto end;
643
644 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
645 printk(KERN_WARNING PREFIX
646 "Can not change Invalid GPE/Fixed Event status\n");
647 return -EINVAL;
648 }
649
650 if (index < num_gpes) {
651 if (!strcmp(buf, "disable\n") &&
652 (status & ACPI_EVENT_FLAG_ENABLED))
653 result = acpi_disable_gpe(handle, index);
654 else if (!strcmp(buf, "enable\n") &&
655 !(status & ACPI_EVENT_FLAG_ENABLED))
656 result = acpi_enable_gpe(handle, index);
657 else if (!strcmp(buf, "clear\n") &&
658 (status & ACPI_EVENT_FLAG_SET))
659 result = acpi_clear_gpe(handle, index);
660 else if (!kstrtoul(buf, 0, &tmp))
661 all_counters[index].count = tmp;
662 else
663 result = -EINVAL;
664 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
665 int event = index - num_gpes;
666 if (!strcmp(buf, "disable\n") &&
667 (status & ACPI_EVENT_FLAG_ENABLED))
668 result = acpi_disable_event(event, ACPI_NOT_ISR);
669 else if (!strcmp(buf, "enable\n") &&
670 !(status & ACPI_EVENT_FLAG_ENABLED))
671 result = acpi_enable_event(event, ACPI_NOT_ISR);
672 else if (!strcmp(buf, "clear\n") &&
673 (status & ACPI_EVENT_FLAG_SET))
674 result = acpi_clear_event(event);
675 else if (!kstrtoul(buf, 0, &tmp))
676 all_counters[index].count = tmp;
677 else
678 result = -EINVAL;
679 } else
680 all_counters[index].count = strtoul(buf, NULL, 0);
681
682 if (ACPI_FAILURE(result))
683 result = -EINVAL;
684 end:
685 return result ? result : size;
686 }
687
688 void acpi_irq_stats_init(void)
689 {
690 acpi_status status;
691 int i;
692
693 if (all_counters)
694 return;
695
696 num_gpes = acpi_current_gpe_count;
697 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
698
699 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
700 GFP_KERNEL);
701 if (all_attrs == NULL)
702 return;
703
704 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
705 GFP_KERNEL);
706 if (all_counters == NULL)
707 goto fail;
708
709 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
710 if (ACPI_FAILURE(status))
711 goto fail;
712
713 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
714 GFP_KERNEL);
715 if (counter_attrs == NULL)
716 goto fail;
717
718 for (i = 0; i < num_counters; ++i) {
719 char buffer[12];
720 char *name;
721
722 if (i < num_gpes)
723 sprintf(buffer, "gpe%02X", i);
724 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
725 sprintf(buffer, "ff_pmtimer");
726 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
727 sprintf(buffer, "ff_gbl_lock");
728 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
729 sprintf(buffer, "ff_pwr_btn");
730 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
731 sprintf(buffer, "ff_slp_btn");
732 else if (i == num_gpes + ACPI_EVENT_RTC)
733 sprintf(buffer, "ff_rt_clk");
734 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
735 sprintf(buffer, "gpe_all");
736 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
737 sprintf(buffer, "sci");
738 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
739 sprintf(buffer, "sci_not");
740 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
741 sprintf(buffer, "error");
742 else
743 sprintf(buffer, "bug%02X", i);
744
745 name = kstrdup(buffer, GFP_KERNEL);
746 if (name == NULL)
747 goto fail;
748
749 sysfs_attr_init(&counter_attrs[i].attr);
750 counter_attrs[i].attr.name = name;
751 counter_attrs[i].attr.mode = 0644;
752 counter_attrs[i].show = counter_show;
753 counter_attrs[i].store = counter_set;
754
755 all_attrs[i] = &counter_attrs[i].attr;
756 }
757
758 interrupt_stats_attr_group.attrs = all_attrs;
759 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
760 return;
761
762 fail:
763 delete_gpe_attr_array();
764 return;
765 }
766
767 static void __exit interrupt_stats_exit(void)
768 {
769 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
770
771 delete_gpe_attr_array();
772
773 return;
774 }
775
776 static ssize_t
777 acpi_show_profile(struct device *dev, struct device_attribute *attr,
778 char *buf)
779 {
780 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
781 }
782
783 static const struct device_attribute pm_profile_attr =
784 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
785
786 static ssize_t hotplug_enabled_show(struct kobject *kobj,
787 struct kobj_attribute *attr, char *buf)
788 {
789 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
790
791 return sprintf(buf, "%d\n", hotplug->enabled);
792 }
793
794 static ssize_t hotplug_enabled_store(struct kobject *kobj,
795 struct kobj_attribute *attr,
796 const char *buf, size_t size)
797 {
798 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
799 unsigned int val;
800
801 if (kstrtouint(buf, 10, &val) || val > 1)
802 return -EINVAL;
803
804 acpi_scan_hotplug_enabled(hotplug, val);
805 return size;
806 }
807
808 static struct kobj_attribute hotplug_enabled_attr =
809 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
810 hotplug_enabled_store);
811
812 static struct attribute *hotplug_profile_attrs[] = {
813 &hotplug_enabled_attr.attr,
814 NULL
815 };
816
817 static struct kobj_type acpi_hotplug_profile_ktype = {
818 .sysfs_ops = &kobj_sysfs_ops,
819 .default_attrs = hotplug_profile_attrs,
820 };
821
822 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
823 const char *name)
824 {
825 int error;
826
827 if (!hotplug_kobj)
828 goto err_out;
829
830 error = kobject_init_and_add(&hotplug->kobj,
831 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
832 if (error)
833 goto err_out;
834
835 kobject_uevent(&hotplug->kobj, KOBJ_ADD);
836 return;
837
838 err_out:
839 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
840 }
841
842 static ssize_t force_remove_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *buf)
844 {
845 return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
846 }
847
848 static ssize_t force_remove_store(struct kobject *kobj,
849 struct kobj_attribute *attr,
850 const char *buf, size_t size)
851 {
852 bool val;
853 int ret;
854
855 ret = strtobool(buf, &val);
856 if (ret < 0)
857 return ret;
858
859 lock_device_hotplug();
860 acpi_force_hot_remove = val;
861 unlock_device_hotplug();
862 return size;
863 }
864
865 static const struct kobj_attribute force_remove_attr =
866 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
867 force_remove_store);
868
869 int __init acpi_sysfs_init(void)
870 {
871 int result;
872
873 result = acpi_tables_sysfs_init();
874 if (result)
875 return result;
876
877 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
878 if (!hotplug_kobj)
879 return -ENOMEM;
880
881 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
882 if (result)
883 return result;
884
885 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
886 return result;
887 }
Linux kernel - Deliverables
This page took 0.065168 seconds and 6 git commands to generate.