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Commit | Line | Data |
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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 | 316 | |
914c6194 LZ |
317 | #define ACPI_MAX_TABLE_INSTANCES 999 |
318 | #define ACPI_INST_SIZE 4 /* including trailing 0 */ | |
319 | ||
1c8fce27 ZR |
320 | struct acpi_table_attr { |
321 | struct bin_attribute attr; | |
914c6194 | 322 | char name[ACPI_NAME_SIZE]; |
1c8fce27 | 323 | int instance; |
914c6194 | 324 | char filename[ACPI_NAME_SIZE+ACPI_INST_SIZE]; |
1c8fce27 ZR |
325 | struct list_head node; |
326 | }; | |
327 | ||
328 | static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, | |
329 | struct bin_attribute *bin_attr, char *buf, | |
330 | loff_t offset, size_t count) | |
331 | { | |
332 | struct acpi_table_attr *table_attr = | |
333 | container_of(bin_attr, struct acpi_table_attr, attr); | |
334 | struct acpi_table_header *table_header = NULL; | |
335 | acpi_status status; | |
1c8fce27 | 336 | |
914c6194 LZ |
337 | status = acpi_get_table(table_attr->name, table_attr->instance, |
338 | &table_header); | |
1c8fce27 ZR |
339 | if (ACPI_FAILURE(status)) |
340 | return -ENODEV; | |
341 | ||
342 | return memory_read_from_buffer(buf, count, &offset, | |
343 | table_header, table_header->length); | |
344 | } | |
345 | ||
914c6194 LZ |
346 | static int acpi_table_attr_init(struct kobject *tables_obj, |
347 | struct acpi_table_attr *table_attr, | |
348 | struct acpi_table_header *table_header) | |
1c8fce27 ZR |
349 | { |
350 | struct acpi_table_header *header = NULL; | |
351 | struct acpi_table_attr *attr = NULL; | |
914c6194 | 352 | char instance_str[ACPI_INST_SIZE]; |
1c8fce27 ZR |
353 | |
354 | sysfs_attr_init(&table_attr->attr.attr); | |
914c6194 | 355 | ACPI_MOVE_NAME(table_attr->name, table_header->signature); |
1c8fce27 ZR |
356 | |
357 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
914c6194 | 358 | if (ACPI_COMPARE_NAME(table_attr->name, attr->name)) |
1c8fce27 ZR |
359 | if (table_attr->instance < attr->instance) |
360 | table_attr->instance = attr->instance; | |
361 | } | |
362 | table_attr->instance++; | |
914c6194 LZ |
363 | if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) { |
364 | pr_warn("%4.4s: too many table instances\n", | |
365 | table_attr->name); | |
366 | return -ERANGE; | |
367 | } | |
1c8fce27 | 368 | |
914c6194 LZ |
369 | ACPI_MOVE_NAME(table_attr->filename, table_header->signature); |
370 | table_attr->filename[ACPI_NAME_SIZE] = '\0'; | |
1c8fce27 ZR |
371 | if (table_attr->instance > 1 || (table_attr->instance == 1 && |
372 | !acpi_get_table | |
914c6194 LZ |
373 | (table_header->signature, 2, &header))) { |
374 | snprintf(instance_str, sizeof(instance_str), "%u", | |
375 | table_attr->instance); | |
376 | strcat(table_attr->filename, instance_str); | |
377 | } | |
1c8fce27 | 378 | |
083ca8c4 | 379 | table_attr->attr.size = table_header->length; |
1c8fce27 | 380 | table_attr->attr.read = acpi_table_show; |
914c6194 | 381 | table_attr->attr.attr.name = table_attr->filename; |
1c8fce27 ZR |
382 | table_attr->attr.attr.mode = 0400; |
383 | ||
914c6194 | 384 | return sysfs_create_bin_file(tables_obj, &table_attr->attr); |
1c8fce27 ZR |
385 | } |
386 | ||
68bdb677 | 387 | acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) |
1c8fce27 ZR |
388 | { |
389 | struct acpi_table_attr *table_attr; | |
390 | ||
391 | switch (event) { | |
307ecb0a | 392 | case ACPI_TABLE_EVENT_INSTALL: |
1c8fce27 ZR |
393 | table_attr = |
394 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
395 | if (!table_attr) | |
396 | return AE_NO_MEMORY; | |
397 | ||
914c6194 LZ |
398 | if (acpi_table_attr_init(dynamic_tables_kobj, |
399 | table_attr, table)) { | |
1c8fce27 ZR |
400 | kfree(table_attr); |
401 | return AE_ERROR; | |
914c6194 LZ |
402 | } |
403 | list_add_tail(&table_attr->node, &acpi_table_attr_list); | |
1c8fce27 | 404 | break; |
307ecb0a | 405 | case ACPI_TABLE_EVENT_LOAD: |
1c8fce27 | 406 | case ACPI_TABLE_EVENT_UNLOAD: |
307ecb0a | 407 | case ACPI_TABLE_EVENT_UNINSTALL: |
1c8fce27 ZR |
408 | /* |
409 | * we do not need to do anything right now | |
410 | * because the table is not deleted from the | |
411 | * global table list when unloading it. | |
412 | */ | |
413 | break; | |
414 | default: | |
415 | return AE_BAD_PARAMETER; | |
416 | } | |
417 | return AE_OK; | |
418 | } | |
419 | ||
420 | static int acpi_tables_sysfs_init(void) | |
421 | { | |
422 | struct acpi_table_attr *table_attr; | |
423 | struct acpi_table_header *table_header = NULL; | |
de03beed JC |
424 | int table_index; |
425 | acpi_status status; | |
426 | int ret; | |
1c8fce27 ZR |
427 | |
428 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); | |
429 | if (!tables_kobj) | |
430 | goto err; | |
431 | ||
432 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); | |
433 | if (!dynamic_tables_kobj) | |
434 | goto err_dynamic_tables; | |
435 | ||
de03beed JC |
436 | for (table_index = 0;; table_index++) { |
437 | status = acpi_get_table_by_index(table_index, &table_header); | |
438 | ||
439 | if (status == AE_BAD_PARAMETER) | |
440 | break; | |
441 | ||
442 | if (ACPI_FAILURE(status)) | |
443 | continue; | |
444 | ||
de03beed JC |
445 | table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); |
446 | if (!table_attr) | |
447 | return -ENOMEM; | |
448 | ||
914c6194 LZ |
449 | ret = acpi_table_attr_init(tables_kobj, |
450 | table_attr, table_header); | |
de03beed JC |
451 | if (ret) { |
452 | kfree(table_attr); | |
453 | return ret; | |
1c8fce27 | 454 | } |
de03beed JC |
455 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
456 | } | |
457 | ||
1c8fce27 ZR |
458 | kobject_uevent(tables_kobj, KOBJ_ADD); |
459 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); | |
1c8fce27 | 460 | |
68bdb677 | 461 | return 0; |
1c8fce27 ZR |
462 | err_dynamic_tables: |
463 | kobject_put(tables_kobj); | |
464 | err: | |
465 | return -ENOMEM; | |
466 | } | |
467 | ||
468 | /* | |
469 | * Detailed ACPI IRQ counters: | |
470 | * /sys/firmware/acpi/interrupts/ | |
471 | */ | |
472 | ||
473 | u32 acpi_irq_handled; | |
474 | u32 acpi_irq_not_handled; | |
475 | ||
476 | #define COUNT_GPE 0 | |
477 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
478 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ | |
479 | #define COUNT_ERROR 3 /* other */ | |
480 | #define NUM_COUNTERS_EXTRA 4 | |
481 | ||
482 | struct event_counter { | |
483 | u32 count; | |
484 | u32 flags; | |
485 | }; | |
486 | ||
487 | static struct event_counter *all_counters; | |
488 | static u32 num_gpes; | |
489 | static u32 num_counters; | |
490 | static struct attribute **all_attrs; | |
491 | static u32 acpi_gpe_count; | |
492 | ||
493 | static struct attribute_group interrupt_stats_attr_group = { | |
494 | .name = "interrupts", | |
495 | }; | |
496 | ||
497 | static struct kobj_attribute *counter_attrs; | |
498 | ||
499 | static void delete_gpe_attr_array(void) | |
500 | { | |
501 | struct event_counter *tmp = all_counters; | |
502 | ||
503 | all_counters = NULL; | |
504 | kfree(tmp); | |
505 | ||
506 | if (counter_attrs) { | |
507 | int i; | |
508 | ||
509 | for (i = 0; i < num_gpes; i++) | |
510 | kfree(counter_attrs[i].attr.name); | |
511 | ||
512 | kfree(counter_attrs); | |
513 | } | |
514 | kfree(all_attrs); | |
515 | ||
516 | return; | |
517 | } | |
518 | ||
a0fcdb23 | 519 | static void gpe_count(u32 gpe_number) |
1c8fce27 ZR |
520 | { |
521 | acpi_gpe_count++; | |
522 | ||
523 | if (!all_counters) | |
524 | return; | |
525 | ||
526 | if (gpe_number < num_gpes) | |
527 | all_counters[gpe_number].count++; | |
528 | else | |
529 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
530 | COUNT_ERROR].count++; | |
531 | ||
532 | return; | |
533 | } | |
534 | ||
a0fcdb23 | 535 | static void fixed_event_count(u32 event_number) |
1c8fce27 ZR |
536 | { |
537 | if (!all_counters) | |
538 | return; | |
539 | ||
540 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
541 | all_counters[num_gpes + event_number].count++; | |
542 | else | |
543 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
544 | COUNT_ERROR].count++; | |
545 | ||
546 | return; | |
547 | } | |
548 | ||
644ef74e | 549 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, |
a0fcdb23 LM |
550 | u32 event_number, void *context) |
551 | { | |
552 | if (event_type == ACPI_EVENT_TYPE_GPE) | |
553 | gpe_count(event_number); | |
554 | ||
555 | if (event_type == ACPI_EVENT_TYPE_FIXED) | |
556 | fixed_event_count(event_number); | |
557 | } | |
558 | ||
1c8fce27 ZR |
559 | static int get_status(u32 index, acpi_event_status *status, |
560 | acpi_handle *handle) | |
561 | { | |
f18ebc21 | 562 | int result; |
1c8fce27 ZR |
563 | |
564 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
f18ebc21 | 565 | return -EINVAL; |
1c8fce27 ZR |
566 | |
567 | if (index < num_gpes) { | |
568 | result = acpi_get_gpe_device(index, handle); | |
569 | if (result) { | |
570 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
c6284237 | 571 | "Invalid GPE 0x%x", index)); |
f18ebc21 | 572 | return result; |
1c8fce27 ZR |
573 | } |
574 | result = acpi_get_gpe_status(*handle, index, status); | |
575 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
576 | result = acpi_get_event_status(index - num_gpes, status); | |
577 | ||
1c8fce27 ZR |
578 | return result; |
579 | } | |
580 | ||
581 | static ssize_t counter_show(struct kobject *kobj, | |
582 | struct kobj_attribute *attr, char *buf) | |
583 | { | |
584 | int index = attr - counter_attrs; | |
585 | int size; | |
586 | acpi_handle handle; | |
587 | acpi_event_status status; | |
588 | int result = 0; | |
589 | ||
590 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
591 | acpi_irq_handled; | |
592 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = | |
593 | acpi_irq_not_handled; | |
594 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = | |
595 | acpi_gpe_count; | |
7b1a1322 | 596 | size = sprintf(buf, "%8u", all_counters[index].count); |
1c8fce27 ZR |
597 | |
598 | /* "gpe_all" or "sci" */ | |
599 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
600 | goto end; | |
601 | ||
602 | result = get_status(index, &status, &handle); | |
603 | if (result) | |
604 | goto end; | |
605 | ||
18864cc4 LZ |
606 | if (status & ACPI_EVENT_FLAG_ENABLE_SET) |
607 | size += sprintf(buf + size, " EN"); | |
608 | else | |
609 | size += sprintf(buf + size, " "); | |
610 | if (status & ACPI_EVENT_FLAG_STATUS_SET) | |
611 | size += sprintf(buf + size, " STS"); | |
612 | else | |
613 | size += sprintf(buf + size, " "); | |
614 | ||
2f857234 | 615 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) |
18864cc4 | 616 | size += sprintf(buf + size, " invalid "); |
1c8fce27 | 617 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
18864cc4 | 618 | size += sprintf(buf + size, " enabled "); |
1c8fce27 | 619 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) |
18864cc4 | 620 | size += sprintf(buf + size, " wake_enabled"); |
1c8fce27 | 621 | else |
18864cc4 LZ |
622 | size += sprintf(buf + size, " disabled "); |
623 | if (status & ACPI_EVENT_FLAG_MASKED) | |
624 | size += sprintf(buf + size, " masked "); | |
625 | else | |
626 | size += sprintf(buf + size, " unmasked"); | |
1c8fce27 ZR |
627 | |
628 | end: | |
629 | size += sprintf(buf + size, "\n"); | |
630 | return result ? result : size; | |
631 | } | |
632 | ||
633 | /* | |
634 | * counter_set() sets the specified counter. | |
635 | * setting the total "sci" file to any value clears all counters. | |
636 | * enable/disable/clear a gpe/fixed event in user space. | |
637 | */ | |
638 | static ssize_t counter_set(struct kobject *kobj, | |
639 | struct kobj_attribute *attr, const char *buf, | |
640 | size_t size) | |
641 | { | |
642 | int index = attr - counter_attrs; | |
643 | acpi_event_status status; | |
644 | acpi_handle handle; | |
645 | int result = 0; | |
c48b1565 | 646 | unsigned long tmp; |
1c8fce27 ZR |
647 | |
648 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
649 | int i; | |
650 | for (i = 0; i < num_counters; ++i) | |
651 | all_counters[i].count = 0; | |
652 | acpi_gpe_count = 0; | |
653 | acpi_irq_handled = 0; | |
654 | acpi_irq_not_handled = 0; | |
655 | goto end; | |
656 | } | |
657 | ||
658 | /* show the event status for both GPEs and Fixed Events */ | |
659 | result = get_status(index, &status, &handle); | |
660 | if (result) | |
661 | goto end; | |
662 | ||
2f857234 | 663 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { |
1c8fce27 ZR |
664 | printk(KERN_WARNING PREFIX |
665 | "Can not change Invalid GPE/Fixed Event status\n"); | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
669 | if (index < num_gpes) { | |
670 | if (!strcmp(buf, "disable\n") && | |
671 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
672 | result = acpi_disable_gpe(handle, index); | |
673 | else if (!strcmp(buf, "enable\n") && | |
674 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
675 | result = acpi_enable_gpe(handle, index); | |
676 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 677 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 678 | result = acpi_clear_gpe(handle, index); |
18864cc4 LZ |
679 | else if (!strcmp(buf, "mask\n")) |
680 | result = acpi_mask_gpe(handle, index, TRUE); | |
681 | else if (!strcmp(buf, "unmask\n")) | |
682 | result = acpi_mask_gpe(handle, index, FALSE); | |
c48b1565 LT |
683 | else if (!kstrtoul(buf, 0, &tmp)) |
684 | all_counters[index].count = tmp; | |
1c8fce27 | 685 | else |
c48b1565 | 686 | result = -EINVAL; |
1c8fce27 ZR |
687 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { |
688 | int event = index - num_gpes; | |
689 | if (!strcmp(buf, "disable\n") && | |
18864cc4 | 690 | (status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
691 | result = acpi_disable_event(event, ACPI_NOT_ISR); |
692 | else if (!strcmp(buf, "enable\n") && | |
18864cc4 | 693 | !(status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
694 | result = acpi_enable_event(event, ACPI_NOT_ISR); |
695 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 696 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 697 | result = acpi_clear_event(event); |
c48b1565 LT |
698 | else if (!kstrtoul(buf, 0, &tmp)) |
699 | all_counters[index].count = tmp; | |
1c8fce27 | 700 | else |
c48b1565 | 701 | result = -EINVAL; |
1c8fce27 ZR |
702 | } else |
703 | all_counters[index].count = strtoul(buf, NULL, 0); | |
704 | ||
705 | if (ACPI_FAILURE(result)) | |
706 | result = -EINVAL; | |
707 | end: | |
708 | return result ? result : size; | |
709 | } | |
710 | ||
9c4aa1ee LZ |
711 | /* |
712 | * A Quirk Mechanism for GPE Flooding Prevention: | |
713 | * | |
714 | * Quirks may be needed to prevent GPE flooding on a specific GPE. The | |
715 | * flooding typically cannot be detected and automatically prevented by | |
716 | * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in | |
717 | * the AML tables. This normally indicates a feature gap in Linux, thus | |
718 | * instead of providing endless quirk tables, we provide a boot parameter | |
719 | * for those who want this quirk. For example, if the users want to prevent | |
720 | * the GPE flooding for GPE 00, they need to specify the following boot | |
721 | * parameter: | |
722 | * acpi_mask_gpe=0x00 | |
723 | * The masking status can be modified by the following runtime controlling | |
724 | * interface: | |
725 | * echo unmask > /sys/firmware/acpi/interrupts/gpe00 | |
726 | */ | |
727 | ||
728 | /* | |
729 | * Currently, the GPE flooding prevention only supports to mask the GPEs | |
730 | * numbered from 00 to 7f. | |
731 | */ | |
732 | #define ACPI_MASKABLE_GPE_MAX 0x80 | |
733 | ||
734 | static u64 __initdata acpi_masked_gpes; | |
735 | ||
736 | static int __init acpi_gpe_set_masked_gpes(char *val) | |
737 | { | |
738 | u8 gpe; | |
739 | ||
740 | if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX) | |
741 | return -EINVAL; | |
742 | acpi_masked_gpes |= ((u64)1<<gpe); | |
743 | ||
744 | return 1; | |
745 | } | |
746 | __setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes); | |
747 | ||
748 | void __init acpi_gpe_apply_masked_gpes(void) | |
749 | { | |
750 | acpi_handle handle; | |
751 | acpi_status status; | |
752 | u8 gpe; | |
753 | ||
754 | for (gpe = 0; | |
755 | gpe < min_t(u8, ACPI_MASKABLE_GPE_MAX, acpi_current_gpe_count); | |
756 | gpe++) { | |
757 | if (acpi_masked_gpes & ((u64)1<<gpe)) { | |
758 | status = acpi_get_gpe_device(gpe, &handle); | |
759 | if (ACPI_SUCCESS(status)) { | |
760 | pr_info("Masking GPE 0x%x.\n", gpe); | |
761 | (void)acpi_mask_gpe(handle, gpe, TRUE); | |
762 | } | |
763 | } | |
764 | } | |
765 | } | |
766 | ||
1c8fce27 ZR |
767 | void acpi_irq_stats_init(void) |
768 | { | |
a0fcdb23 | 769 | acpi_status status; |
1c8fce27 ZR |
770 | int i; |
771 | ||
772 | if (all_counters) | |
773 | return; | |
774 | ||
775 | num_gpes = acpi_current_gpe_count; | |
776 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
777 | ||
778 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
779 | GFP_KERNEL); | |
780 | if (all_attrs == NULL) | |
781 | return; | |
782 | ||
783 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), | |
784 | GFP_KERNEL); | |
785 | if (all_counters == NULL) | |
786 | goto fail; | |
787 | ||
644ef74e | 788 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); |
a0fcdb23 LM |
789 | if (ACPI_FAILURE(status)) |
790 | goto fail; | |
791 | ||
1c8fce27 ZR |
792 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), |
793 | GFP_KERNEL); | |
794 | if (counter_attrs == NULL) | |
795 | goto fail; | |
796 | ||
797 | for (i = 0; i < num_counters; ++i) { | |
798 | char buffer[12]; | |
799 | char *name; | |
800 | ||
801 | if (i < num_gpes) | |
802 | sprintf(buffer, "gpe%02X", i); | |
803 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
804 | sprintf(buffer, "ff_pmtimer"); | |
805 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
806 | sprintf(buffer, "ff_gbl_lock"); | |
807 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
808 | sprintf(buffer, "ff_pwr_btn"); | |
809 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
810 | sprintf(buffer, "ff_slp_btn"); | |
811 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
812 | sprintf(buffer, "ff_rt_clk"); | |
813 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
814 | sprintf(buffer, "gpe_all"); | |
815 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
816 | sprintf(buffer, "sci"); | |
817 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) | |
818 | sprintf(buffer, "sci_not"); | |
819 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
820 | sprintf(buffer, "error"); | |
821 | else | |
822 | sprintf(buffer, "bug%02X", i); | |
823 | ||
096a8aac | 824 | name = kstrdup(buffer, GFP_KERNEL); |
1c8fce27 ZR |
825 | if (name == NULL) |
826 | goto fail; | |
1c8fce27 ZR |
827 | |
828 | sysfs_attr_init(&counter_attrs[i].attr); | |
829 | counter_attrs[i].attr.name = name; | |
830 | counter_attrs[i].attr.mode = 0644; | |
831 | counter_attrs[i].show = counter_show; | |
832 | counter_attrs[i].store = counter_set; | |
833 | ||
834 | all_attrs[i] = &counter_attrs[i].attr; | |
835 | } | |
836 | ||
837 | interrupt_stats_attr_group.attrs = all_attrs; | |
838 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) | |
839 | return; | |
840 | ||
841 | fail: | |
842 | delete_gpe_attr_array(); | |
843 | return; | |
844 | } | |
845 | ||
846 | static void __exit interrupt_stats_exit(void) | |
847 | { | |
848 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
849 | ||
850 | delete_gpe_attr_array(); | |
851 | ||
852 | return; | |
853 | } | |
854 | ||
362b6460 TR |
855 | static ssize_t |
856 | acpi_show_profile(struct device *dev, struct device_attribute *attr, | |
857 | char *buf) | |
858 | { | |
859 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); | |
860 | } | |
861 | ||
862 | static const struct device_attribute pm_profile_attr = | |
863 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); | |
864 | ||
3f8055c3 RW |
865 | static ssize_t hotplug_enabled_show(struct kobject *kobj, |
866 | struct kobj_attribute *attr, char *buf) | |
867 | { | |
868 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
869 | ||
870 | return sprintf(buf, "%d\n", hotplug->enabled); | |
871 | } | |
872 | ||
873 | static ssize_t hotplug_enabled_store(struct kobject *kobj, | |
874 | struct kobj_attribute *attr, | |
875 | const char *buf, size_t size) | |
876 | { | |
877 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
878 | unsigned int val; | |
879 | ||
880 | if (kstrtouint(buf, 10, &val) || val > 1) | |
881 | return -EINVAL; | |
882 | ||
883 | acpi_scan_hotplug_enabled(hotplug, val); | |
884 | return size; | |
885 | } | |
886 | ||
887 | static struct kobj_attribute hotplug_enabled_attr = | |
888 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, | |
889 | hotplug_enabled_store); | |
890 | ||
891 | static struct attribute *hotplug_profile_attrs[] = { | |
892 | &hotplug_enabled_attr.attr, | |
893 | NULL | |
894 | }; | |
895 | ||
b09753ec | 896 | static struct kobj_type acpi_hotplug_profile_ktype = { |
3f8055c3 RW |
897 | .sysfs_ops = &kobj_sysfs_ops, |
898 | .default_attrs = hotplug_profile_attrs, | |
899 | }; | |
900 | ||
901 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, | |
902 | const char *name) | |
903 | { | |
904 | int error; | |
905 | ||
906 | if (!hotplug_kobj) | |
907 | goto err_out; | |
908 | ||
acd3e2c9 BH |
909 | error = kobject_init_and_add(&hotplug->kobj, |
910 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); | |
3f8055c3 RW |
911 | if (error) |
912 | goto err_out; | |
913 | ||
914 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); | |
915 | return; | |
916 | ||
917 | err_out: | |
918 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); | |
919 | } | |
920 | ||
683058e3 RW |
921 | static ssize_t force_remove_show(struct kobject *kobj, |
922 | struct kobj_attribute *attr, char *buf) | |
923 | { | |
924 | return sprintf(buf, "%d\n", !!acpi_force_hot_remove); | |
925 | } | |
926 | ||
927 | static ssize_t force_remove_store(struct kobject *kobj, | |
928 | struct kobj_attribute *attr, | |
929 | const char *buf, size_t size) | |
930 | { | |
931 | bool val; | |
932 | int ret; | |
933 | ||
934 | ret = strtobool(buf, &val); | |
935 | if (ret < 0) | |
936 | return ret; | |
937 | ||
938 | lock_device_hotplug(); | |
939 | acpi_force_hot_remove = val; | |
940 | unlock_device_hotplug(); | |
941 | return size; | |
942 | } | |
943 | ||
944 | static const struct kobj_attribute force_remove_attr = | |
945 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, | |
946 | force_remove_store); | |
947 | ||
1c8fce27 ZR |
948 | int __init acpi_sysfs_init(void) |
949 | { | |
950 | int result; | |
951 | ||
952 | result = acpi_tables_sysfs_init(); | |
362b6460 TR |
953 | if (result) |
954 | return result; | |
3f8055c3 RW |
955 | |
956 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); | |
bc1e49df IY |
957 | if (!hotplug_kobj) |
958 | return -ENOMEM; | |
959 | ||
683058e3 RW |
960 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); |
961 | if (result) | |
962 | return result; | |
963 | ||
362b6460 | 964 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); |
1c8fce27 ZR |
965 | return result; |
966 | } |