Commit | Line | Data |
---|---|---|
1c8fce27 ZR |
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> | |
8b48463f | 8 | #include <linux/acpi.h> |
1c8fce27 | 9 | |
3f8055c3 RW |
10 | #include "internal.h" |
11 | ||
1c8fce27 ZR |
12 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
13 | ACPI_MODULE_NAME("sysfs"); | |
14 | ||
1c8fce27 ZR |
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), | |
93d98831 | 72 | ACPI_DEBUG_INIT(ACPI_LV_REPAIR), |
7901a052 | 73 | ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), |
1c8fce27 ZR |
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 | ||
ec652b35 | 105 | static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
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 | ||
ec652b35 | 133 | static int param_get_debug_level(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
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 | ||
9c8b04be | 154 | static const struct kernel_param_ops param_ops_debug_layer = { |
ec652b35 ZR |
155 | .set = param_set_uint, |
156 | .get = param_get_debug_layer, | |
157 | }; | |
158 | ||
9c8b04be | 159 | static const struct kernel_param_ops param_ops_debug_level = { |
ec652b35 ZR |
160 | .set = param_set_uint, |
161 | .get = param_get_debug_level, | |
162 | }; | |
163 | ||
164 | module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); | |
165 | module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644); | |
1c8fce27 | 166 | |
a0186bcf | 167 | static char trace_method_name[1024]; |
1c8fce27 | 168 | |
7901a052 | 169 | int param_set_trace_method_name(const char *val, const struct kernel_param *kp) |
1c8fce27 | 170 | { |
7901a052 | 171 | u32 saved_flags = 0; |
a0186bcf | 172 | bool is_abs_path = true; |
1c8fce27 | 173 | |
a0186bcf LZ |
174 | if (*val != '\\') |
175 | is_abs_path = false; | |
176 | ||
177 | if ((is_abs_path && strlen(val) > 1023) || | |
178 | (!is_abs_path && strlen(val) > 1022)) { | |
7901a052 LZ |
179 | pr_err("%s: string parameter too long\n", kp->name); |
180 | return -ENOSPC; | |
1c8fce27 ZR |
181 | } |
182 | ||
7901a052 LZ |
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 | ||
7901a052 | 194 | /* This is a hack. We can't kmalloc in early boot. */ |
a0186bcf LZ |
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 | } | |
7901a052 LZ |
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); | |
1c8fce27 | 207 | |
7901a052 LZ |
208 | return 0; |
209 | } | |
1c8fce27 | 210 | |
7901a052 LZ |
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, ¶m_ops_trace_method, &trace_method_name, 0644); | |
227 | module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644); | |
228 | module_param_cb(trace_debug_level, ¶m_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; | |
1c8fce27 ZR |
264 | } |
265 | ||
266 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
267 | { | |
7901a052 | 268 | if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) |
1c8fce27 ZR |
269 | return sprintf(buffer, "disable"); |
270 | else { | |
7901a052 LZ |
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 | |
1c8fce27 ZR |
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 | ||
aecad432 TR |
286 | |
287 | /* /sys/modules/acpi/parameters/aml_debug_output */ | |
288 | ||
289 | module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, | |
481c1381 | 290 | byte, 0644); |
aecad432 TR |
291 | MODULE_PARM_DESC(aml_debug_output, |
292 | "To enable/disable the ACPI Debug Object output."); | |
293 | ||
1c8fce27 ZR |
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; | |
3f8055c3 | 315 | static struct kobject *hotplug_kobj; |
1c8fce27 ZR |
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 | ||
083ca8c4 | 373 | table_attr->attr.size = table_header->length; |
1c8fce27 ZR |
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; | |
de03beed JC |
418 | int table_index; |
419 | acpi_status status; | |
420 | int ret; | |
1c8fce27 ZR |
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 | ||
de03beed JC |
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; | |
1c8fce27 | 449 | } |
de03beed JC |
450 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
451 | } | |
452 | ||
1c8fce27 ZR |
453 | kobject_uevent(tables_kobj, KOBJ_ADD); |
454 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); | |
de03beed | 455 | status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); |
1c8fce27 | 456 | |
de03beed | 457 | return ACPI_FAILURE(status) ? -EINVAL : 0; |
1c8fce27 ZR |
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 | ||
a0fcdb23 | 515 | static void gpe_count(u32 gpe_number) |
1c8fce27 ZR |
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 | ||
a0fcdb23 | 531 | static void fixed_event_count(u32 event_number) |
1c8fce27 ZR |
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 | ||
644ef74e | 545 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, |
a0fcdb23 LM |
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 | ||
1c8fce27 ZR |
555 | static int get_status(u32 index, acpi_event_status *status, |
556 | acpi_handle *handle) | |
557 | { | |
558 | int result = 0; | |
559 | ||
560 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
561 | goto end; | |
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, | |
c6284237 | 567 | "Invalid GPE 0x%x", index)); |
1c8fce27 ZR |
568 | goto end; |
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 | end: | |
575 | return result; | |
576 | } | |
577 | ||
578 | static ssize_t counter_show(struct kobject *kobj, | |
579 | struct kobj_attribute *attr, char *buf) | |
580 | { | |
581 | int index = attr - counter_attrs; | |
582 | int size; | |
583 | acpi_handle handle; | |
584 | acpi_event_status status; | |
585 | int result = 0; | |
586 | ||
587 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
588 | acpi_irq_handled; | |
589 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = | |
590 | acpi_irq_not_handled; | |
591 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = | |
592 | acpi_gpe_count; | |
7b1a1322 | 593 | size = sprintf(buf, "%8u", all_counters[index].count); |
1c8fce27 ZR |
594 | |
595 | /* "gpe_all" or "sci" */ | |
596 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
597 | goto end; | |
598 | ||
599 | result = get_status(index, &status, &handle); | |
600 | if (result) | |
601 | goto end; | |
602 | ||
2f857234 | 603 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) |
1c8fce27 ZR |
604 | size += sprintf(buf + size, " invalid"); |
605 | else if (status & ACPI_EVENT_FLAG_ENABLED) | |
606 | size += sprintf(buf + size, " enabled"); | |
607 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) | |
608 | size += sprintf(buf + size, " wake_enabled"); | |
609 | else | |
610 | size += sprintf(buf + size, " disabled"); | |
611 | ||
612 | end: | |
613 | size += sprintf(buf + size, "\n"); | |
614 | return result ? result : size; | |
615 | } | |
616 | ||
617 | /* | |
618 | * counter_set() sets the specified counter. | |
619 | * setting the total "sci" file to any value clears all counters. | |
620 | * enable/disable/clear a gpe/fixed event in user space. | |
621 | */ | |
622 | static ssize_t counter_set(struct kobject *kobj, | |
623 | struct kobj_attribute *attr, const char *buf, | |
624 | size_t size) | |
625 | { | |
626 | int index = attr - counter_attrs; | |
627 | acpi_event_status status; | |
628 | acpi_handle handle; | |
629 | int result = 0; | |
c48b1565 | 630 | unsigned long tmp; |
1c8fce27 ZR |
631 | |
632 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
633 | int i; | |
634 | for (i = 0; i < num_counters; ++i) | |
635 | all_counters[i].count = 0; | |
636 | acpi_gpe_count = 0; | |
637 | acpi_irq_handled = 0; | |
638 | acpi_irq_not_handled = 0; | |
639 | goto end; | |
640 | } | |
641 | ||
642 | /* show the event status for both GPEs and Fixed Events */ | |
643 | result = get_status(index, &status, &handle); | |
644 | if (result) | |
645 | goto end; | |
646 | ||
2f857234 | 647 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { |
1c8fce27 ZR |
648 | printk(KERN_WARNING PREFIX |
649 | "Can not change Invalid GPE/Fixed Event status\n"); | |
650 | return -EINVAL; | |
651 | } | |
652 | ||
653 | if (index < num_gpes) { | |
654 | if (!strcmp(buf, "disable\n") && | |
655 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
656 | result = acpi_disable_gpe(handle, index); | |
657 | else if (!strcmp(buf, "enable\n") && | |
658 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
659 | result = acpi_enable_gpe(handle, index); | |
660 | else if (!strcmp(buf, "clear\n") && | |
661 | (status & ACPI_EVENT_FLAG_SET)) | |
662 | result = acpi_clear_gpe(handle, index); | |
c48b1565 LT |
663 | else if (!kstrtoul(buf, 0, &tmp)) |
664 | all_counters[index].count = tmp; | |
1c8fce27 | 665 | else |
c48b1565 | 666 | result = -EINVAL; |
1c8fce27 ZR |
667 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { |
668 | int event = index - num_gpes; | |
669 | if (!strcmp(buf, "disable\n") && | |
670 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
671 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
672 | else if (!strcmp(buf, "enable\n") && | |
673 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
674 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
675 | else if (!strcmp(buf, "clear\n") && | |
676 | (status & ACPI_EVENT_FLAG_SET)) | |
677 | result = acpi_clear_event(event); | |
c48b1565 LT |
678 | else if (!kstrtoul(buf, 0, &tmp)) |
679 | all_counters[index].count = tmp; | |
1c8fce27 | 680 | else |
c48b1565 | 681 | result = -EINVAL; |
1c8fce27 ZR |
682 | } else |
683 | all_counters[index].count = strtoul(buf, NULL, 0); | |
684 | ||
685 | if (ACPI_FAILURE(result)) | |
686 | result = -EINVAL; | |
687 | end: | |
688 | return result ? result : size; | |
689 | } | |
690 | ||
691 | void acpi_irq_stats_init(void) | |
692 | { | |
a0fcdb23 | 693 | acpi_status status; |
1c8fce27 ZR |
694 | int i; |
695 | ||
696 | if (all_counters) | |
697 | return; | |
698 | ||
699 | num_gpes = acpi_current_gpe_count; | |
700 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
701 | ||
702 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
703 | GFP_KERNEL); | |
704 | if (all_attrs == NULL) | |
705 | return; | |
706 | ||
707 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), | |
708 | GFP_KERNEL); | |
709 | if (all_counters == NULL) | |
710 | goto fail; | |
711 | ||
644ef74e | 712 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); |
a0fcdb23 LM |
713 | if (ACPI_FAILURE(status)) |
714 | goto fail; | |
715 | ||
1c8fce27 ZR |
716 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), |
717 | GFP_KERNEL); | |
718 | if (counter_attrs == NULL) | |
719 | goto fail; | |
720 | ||
721 | for (i = 0; i < num_counters; ++i) { | |
722 | char buffer[12]; | |
723 | char *name; | |
724 | ||
725 | if (i < num_gpes) | |
726 | sprintf(buffer, "gpe%02X", i); | |
727 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
728 | sprintf(buffer, "ff_pmtimer"); | |
729 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
730 | sprintf(buffer, "ff_gbl_lock"); | |
731 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
732 | sprintf(buffer, "ff_pwr_btn"); | |
733 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
734 | sprintf(buffer, "ff_slp_btn"); | |
735 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
736 | sprintf(buffer, "ff_rt_clk"); | |
737 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
738 | sprintf(buffer, "gpe_all"); | |
739 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
740 | sprintf(buffer, "sci"); | |
741 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) | |
742 | sprintf(buffer, "sci_not"); | |
743 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
744 | sprintf(buffer, "error"); | |
745 | else | |
746 | sprintf(buffer, "bug%02X", i); | |
747 | ||
096a8aac | 748 | name = kstrdup(buffer, GFP_KERNEL); |
1c8fce27 ZR |
749 | if (name == NULL) |
750 | goto fail; | |
1c8fce27 ZR |
751 | |
752 | sysfs_attr_init(&counter_attrs[i].attr); | |
753 | counter_attrs[i].attr.name = name; | |
754 | counter_attrs[i].attr.mode = 0644; | |
755 | counter_attrs[i].show = counter_show; | |
756 | counter_attrs[i].store = counter_set; | |
757 | ||
758 | all_attrs[i] = &counter_attrs[i].attr; | |
759 | } | |
760 | ||
761 | interrupt_stats_attr_group.attrs = all_attrs; | |
762 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) | |
763 | return; | |
764 | ||
765 | fail: | |
766 | delete_gpe_attr_array(); | |
767 | return; | |
768 | } | |
769 | ||
770 | static void __exit interrupt_stats_exit(void) | |
771 | { | |
772 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
773 | ||
774 | delete_gpe_attr_array(); | |
775 | ||
776 | return; | |
777 | } | |
778 | ||
362b6460 TR |
779 | static ssize_t |
780 | acpi_show_profile(struct device *dev, struct device_attribute *attr, | |
781 | char *buf) | |
782 | { | |
783 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); | |
784 | } | |
785 | ||
786 | static const struct device_attribute pm_profile_attr = | |
787 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); | |
788 | ||
3f8055c3 RW |
789 | static ssize_t hotplug_enabled_show(struct kobject *kobj, |
790 | struct kobj_attribute *attr, char *buf) | |
791 | { | |
792 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
793 | ||
794 | return sprintf(buf, "%d\n", hotplug->enabled); | |
795 | } | |
796 | ||
797 | static ssize_t hotplug_enabled_store(struct kobject *kobj, | |
798 | struct kobj_attribute *attr, | |
799 | const char *buf, size_t size) | |
800 | { | |
801 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
802 | unsigned int val; | |
803 | ||
804 | if (kstrtouint(buf, 10, &val) || val > 1) | |
805 | return -EINVAL; | |
806 | ||
807 | acpi_scan_hotplug_enabled(hotplug, val); | |
808 | return size; | |
809 | } | |
810 | ||
811 | static struct kobj_attribute hotplug_enabled_attr = | |
812 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, | |
813 | hotplug_enabled_store); | |
814 | ||
815 | static struct attribute *hotplug_profile_attrs[] = { | |
816 | &hotplug_enabled_attr.attr, | |
817 | NULL | |
818 | }; | |
819 | ||
b09753ec | 820 | static struct kobj_type acpi_hotplug_profile_ktype = { |
3f8055c3 RW |
821 | .sysfs_ops = &kobj_sysfs_ops, |
822 | .default_attrs = hotplug_profile_attrs, | |
823 | }; | |
824 | ||
825 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, | |
826 | const char *name) | |
827 | { | |
828 | int error; | |
829 | ||
830 | if (!hotplug_kobj) | |
831 | goto err_out; | |
832 | ||
acd3e2c9 BH |
833 | error = kobject_init_and_add(&hotplug->kobj, |
834 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); | |
3f8055c3 RW |
835 | if (error) |
836 | goto err_out; | |
837 | ||
838 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); | |
839 | return; | |
840 | ||
841 | err_out: | |
842 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); | |
843 | } | |
844 | ||
683058e3 RW |
845 | static ssize_t force_remove_show(struct kobject *kobj, |
846 | struct kobj_attribute *attr, char *buf) | |
847 | { | |
848 | return sprintf(buf, "%d\n", !!acpi_force_hot_remove); | |
849 | } | |
850 | ||
851 | static ssize_t force_remove_store(struct kobject *kobj, | |
852 | struct kobj_attribute *attr, | |
853 | const char *buf, size_t size) | |
854 | { | |
855 | bool val; | |
856 | int ret; | |
857 | ||
858 | ret = strtobool(buf, &val); | |
859 | if (ret < 0) | |
860 | return ret; | |
861 | ||
862 | lock_device_hotplug(); | |
863 | acpi_force_hot_remove = val; | |
864 | unlock_device_hotplug(); | |
865 | return size; | |
866 | } | |
867 | ||
868 | static const struct kobj_attribute force_remove_attr = | |
869 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, | |
870 | force_remove_store); | |
871 | ||
1c8fce27 ZR |
872 | int __init acpi_sysfs_init(void) |
873 | { | |
874 | int result; | |
875 | ||
876 | result = acpi_tables_sysfs_init(); | |
362b6460 TR |
877 | if (result) |
878 | return result; | |
3f8055c3 RW |
879 | |
880 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); | |
683058e3 RW |
881 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); |
882 | if (result) | |
883 | return result; | |
884 | ||
362b6460 | 885 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); |
1c8fce27 ZR |
886 | return result; |
887 | } |