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Commit | Line | Data |
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1c8fce27 ZR |
1 | /* |
2 | * sysfs.c - ACPI sysfs interface to userspace. | |
3 | */ | |
4 | ||
7db8d1d9 RW |
5 | #define pr_fmt(fmt) "ACPI: " fmt |
6 | ||
1c8fce27 ZR |
7 | #include <linux/init.h> |
8 | #include <linux/kernel.h> | |
9 | #include <linux/moduleparam.h> | |
8b48463f | 10 | #include <linux/acpi.h> |
1c8fce27 | 11 | |
3f8055c3 RW |
12 | #include "internal.h" |
13 | ||
1c8fce27 ZR |
14 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
15 | ACPI_MODULE_NAME("sysfs"); | |
16 | ||
1c8fce27 ZR |
17 | #ifdef CONFIG_ACPI_DEBUG |
18 | /* | |
19 | * ACPI debug sysfs I/F, including: | |
20 | * /sys/modules/acpi/parameters/debug_layer | |
21 | * /sys/modules/acpi/parameters/debug_level | |
22 | * /sys/modules/acpi/parameters/trace_method_name | |
23 | * /sys/modules/acpi/parameters/trace_state | |
24 | * /sys/modules/acpi/parameters/trace_debug_layer | |
25 | * /sys/modules/acpi/parameters/trace_debug_level | |
26 | */ | |
27 | ||
28 | struct acpi_dlayer { | |
29 | const char *name; | |
30 | unsigned long value; | |
31 | }; | |
32 | struct acpi_dlevel { | |
33 | const char *name; | |
34 | unsigned long value; | |
35 | }; | |
36 | #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } | |
37 | ||
38 | static const struct acpi_dlayer acpi_debug_layers[] = { | |
39 | ACPI_DEBUG_INIT(ACPI_UTILITIES), | |
40 | ACPI_DEBUG_INIT(ACPI_HARDWARE), | |
41 | ACPI_DEBUG_INIT(ACPI_EVENTS), | |
42 | ACPI_DEBUG_INIT(ACPI_TABLES), | |
43 | ACPI_DEBUG_INIT(ACPI_NAMESPACE), | |
44 | ACPI_DEBUG_INIT(ACPI_PARSER), | |
45 | ACPI_DEBUG_INIT(ACPI_DISPATCHER), | |
46 | ACPI_DEBUG_INIT(ACPI_EXECUTER), | |
47 | ACPI_DEBUG_INIT(ACPI_RESOURCES), | |
48 | ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), | |
49 | ACPI_DEBUG_INIT(ACPI_OS_SERVICES), | |
50 | ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), | |
51 | ACPI_DEBUG_INIT(ACPI_COMPILER), | |
52 | ACPI_DEBUG_INIT(ACPI_TOOLS), | |
53 | ||
54 | ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), | |
55 | ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), | |
56 | ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), | |
57 | ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), | |
58 | ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), | |
59 | ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), | |
60 | ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), | |
61 | ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), | |
62 | ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), | |
63 | ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), | |
64 | ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), | |
65 | ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), | |
66 | ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), | |
67 | ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), | |
68 | }; | |
69 | ||
70 | static const struct acpi_dlevel acpi_debug_levels[] = { | |
71 | ACPI_DEBUG_INIT(ACPI_LV_INIT), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
93d98831 | 74 | ACPI_DEBUG_INIT(ACPI_LV_REPAIR), |
7901a052 | 75 | ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), |
1c8fce27 ZR |
76 | |
77 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
79 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
80 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
82 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
83 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
84 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
85 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
86 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
87 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
88 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
89 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
90 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
91 | ||
92 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
93 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
94 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
95 | ||
96 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
97 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
98 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
99 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
100 | ||
101 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
102 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
103 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
104 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), | |
105 | }; | |
106 | ||
ec652b35 | 107 | static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
108 | { |
109 | int result = 0; | |
110 | int i; | |
111 | ||
112 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
113 | ||
114 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
115 | result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", | |
116 | acpi_debug_layers[i].name, | |
117 | acpi_debug_layers[i].value, | |
118 | (acpi_dbg_layer & acpi_debug_layers[i].value) | |
119 | ? '*' : ' '); | |
120 | } | |
121 | result += | |
122 | sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
123 | ACPI_ALL_DRIVERS, | |
124 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
125 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS) | |
126 | == 0 ? ' ' : '-'); | |
127 | result += | |
128 | sprintf(buffer + result, | |
129 | "--\ndebug_layer = 0x%08X ( * = enabled)\n", | |
130 | acpi_dbg_layer); | |
131 | ||
132 | return result; | |
133 | } | |
134 | ||
ec652b35 | 135 | static int param_get_debug_level(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
136 | { |
137 | int result = 0; | |
138 | int i; | |
139 | ||
140 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
141 | ||
142 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
143 | result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", | |
144 | acpi_debug_levels[i].name, | |
145 | acpi_debug_levels[i].value, | |
146 | (acpi_dbg_level & acpi_debug_levels[i].value) | |
147 | ? '*' : ' '); | |
148 | } | |
149 | result += | |
150 | sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
151 | acpi_dbg_level); | |
152 | ||
153 | return result; | |
154 | } | |
155 | ||
9c8b04be | 156 | static const struct kernel_param_ops param_ops_debug_layer = { |
ec652b35 ZR |
157 | .set = param_set_uint, |
158 | .get = param_get_debug_layer, | |
159 | }; | |
160 | ||
9c8b04be | 161 | static const struct kernel_param_ops param_ops_debug_level = { |
ec652b35 ZR |
162 | .set = param_set_uint, |
163 | .get = param_get_debug_level, | |
164 | }; | |
165 | ||
166 | module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); | |
167 | module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644); | |
1c8fce27 | 168 | |
a0186bcf | 169 | static char trace_method_name[1024]; |
1c8fce27 | 170 | |
7901a052 | 171 | int param_set_trace_method_name(const char *val, const struct kernel_param *kp) |
1c8fce27 | 172 | { |
7901a052 | 173 | u32 saved_flags = 0; |
a0186bcf | 174 | bool is_abs_path = true; |
1c8fce27 | 175 | |
a0186bcf LZ |
176 | if (*val != '\\') |
177 | is_abs_path = false; | |
178 | ||
179 | if ((is_abs_path && strlen(val) > 1023) || | |
180 | (!is_abs_path && strlen(val) > 1022)) { | |
7901a052 LZ |
181 | pr_err("%s: string parameter too long\n", kp->name); |
182 | return -ENOSPC; | |
1c8fce27 ZR |
183 | } |
184 | ||
7901a052 LZ |
185 | /* |
186 | * It's not safe to update acpi_gbl_trace_method_name without | |
187 | * having the tracer stopped, so we save the original tracer | |
188 | * state and disable it. | |
189 | */ | |
190 | saved_flags = acpi_gbl_trace_flags; | |
191 | (void)acpi_debug_trace(NULL, | |
192 | acpi_gbl_trace_dbg_level, | |
193 | acpi_gbl_trace_dbg_layer, | |
194 | 0); | |
195 | ||
7901a052 | 196 | /* This is a hack. We can't kmalloc in early boot. */ |
a0186bcf LZ |
197 | if (is_abs_path) |
198 | strcpy(trace_method_name, val); | |
199 | else { | |
200 | trace_method_name[0] = '\\'; | |
201 | strcpy(trace_method_name+1, val); | |
202 | } | |
7901a052 LZ |
203 | |
204 | /* Restore the original tracer state */ | |
205 | (void)acpi_debug_trace(trace_method_name, | |
206 | acpi_gbl_trace_dbg_level, | |
207 | acpi_gbl_trace_dbg_layer, | |
208 | saved_flags); | |
1c8fce27 | 209 | |
7901a052 LZ |
210 | return 0; |
211 | } | |
1c8fce27 | 212 | |
7901a052 LZ |
213 | static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp) |
214 | { | |
215 | return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name); | |
216 | } | |
217 | ||
218 | static const struct kernel_param_ops param_ops_trace_method = { | |
219 | .set = param_set_trace_method_name, | |
220 | .get = param_get_trace_method_name, | |
221 | }; | |
222 | ||
223 | static const struct kernel_param_ops param_ops_trace_attrib = { | |
224 | .set = param_set_uint, | |
225 | .get = param_get_uint, | |
226 | }; | |
227 | ||
228 | module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644); | |
229 | module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644); | |
230 | module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644); | |
231 | ||
232 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
233 | { | |
234 | acpi_status status; | |
235 | const char *method = trace_method_name; | |
236 | u32 flags = 0; | |
237 | ||
238 | /* So "xxx-once" comparison should go prior than "xxx" comparison */ | |
239 | #define acpi_compare_param(val, key) \ | |
240 | strncmp((val), (key), sizeof(key) - 1) | |
241 | ||
242 | if (!acpi_compare_param(val, "enable")) { | |
243 | method = NULL; | |
244 | flags = ACPI_TRACE_ENABLED; | |
245 | } else if (!acpi_compare_param(val, "disable")) | |
246 | method = NULL; | |
247 | else if (!acpi_compare_param(val, "method-once")) | |
248 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT; | |
249 | else if (!acpi_compare_param(val, "method")) | |
250 | flags = ACPI_TRACE_ENABLED; | |
251 | else if (!acpi_compare_param(val, "opcode-once")) | |
252 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE; | |
253 | else if (!acpi_compare_param(val, "opcode")) | |
254 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE; | |
255 | else | |
256 | return -EINVAL; | |
257 | ||
258 | status = acpi_debug_trace(method, | |
259 | acpi_gbl_trace_dbg_level, | |
260 | acpi_gbl_trace_dbg_layer, | |
261 | flags); | |
262 | if (ACPI_FAILURE(status)) | |
263 | return -EBUSY; | |
264 | ||
265 | return 0; | |
1c8fce27 ZR |
266 | } |
267 | ||
268 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
269 | { | |
7901a052 | 270 | if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) |
1c8fce27 ZR |
271 | return sprintf(buffer, "disable"); |
272 | else { | |
7901a052 LZ |
273 | if (acpi_gbl_trace_method_name) { |
274 | if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) | |
275 | return sprintf(buffer, "method-once"); | |
276 | else | |
277 | return sprintf(buffer, "method"); | |
278 | } else | |
1c8fce27 ZR |
279 | return sprintf(buffer, "enable"); |
280 | } | |
281 | return 0; | |
282 | } | |
283 | ||
284 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
285 | NULL, 0644); | |
286 | #endif /* CONFIG_ACPI_DEBUG */ | |
287 | ||
aecad432 TR |
288 | |
289 | /* /sys/modules/acpi/parameters/aml_debug_output */ | |
290 | ||
291 | module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, | |
481c1381 | 292 | byte, 0644); |
aecad432 TR |
293 | MODULE_PARM_DESC(aml_debug_output, |
294 | "To enable/disable the ACPI Debug Object output."); | |
295 | ||
1c8fce27 ZR |
296 | /* /sys/module/acpi/parameters/acpica_version */ |
297 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) | |
298 | { | |
299 | int result; | |
300 | ||
301 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
302 | ||
303 | return result; | |
304 | } | |
305 | ||
306 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
307 | ||
308 | /* | |
309 | * ACPI table sysfs I/F: | |
310 | * /sys/firmware/acpi/tables/ | |
7dae6326 | 311 | * /sys/firmware/acpi/tables/data/ |
1c8fce27 ZR |
312 | * /sys/firmware/acpi/tables/dynamic/ |
313 | */ | |
314 | ||
315 | static LIST_HEAD(acpi_table_attr_list); | |
316 | static struct kobject *tables_kobj; | |
7dae6326 | 317 | static struct kobject *tables_data_kobj; |
1c8fce27 | 318 | static struct kobject *dynamic_tables_kobj; |
3f8055c3 | 319 | static struct kobject *hotplug_kobj; |
1c8fce27 | 320 | |
914c6194 LZ |
321 | #define ACPI_MAX_TABLE_INSTANCES 999 |
322 | #define ACPI_INST_SIZE 4 /* including trailing 0 */ | |
323 | ||
1c8fce27 ZR |
324 | struct acpi_table_attr { |
325 | struct bin_attribute attr; | |
914c6194 | 326 | char name[ACPI_NAME_SIZE]; |
1c8fce27 | 327 | int instance; |
914c6194 | 328 | char filename[ACPI_NAME_SIZE+ACPI_INST_SIZE]; |
1c8fce27 ZR |
329 | struct list_head node; |
330 | }; | |
331 | ||
7dae6326 TL |
332 | struct acpi_data_attr { |
333 | struct bin_attribute attr; | |
334 | u64 addr; | |
335 | }; | |
336 | ||
1c8fce27 ZR |
337 | static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, |
338 | struct bin_attribute *bin_attr, char *buf, | |
339 | loff_t offset, size_t count) | |
340 | { | |
341 | struct acpi_table_attr *table_attr = | |
342 | container_of(bin_attr, struct acpi_table_attr, attr); | |
343 | struct acpi_table_header *table_header = NULL; | |
344 | acpi_status status; | |
0de0e198 | 345 | ssize_t rc; |
1c8fce27 | 346 | |
914c6194 LZ |
347 | status = acpi_get_table(table_attr->name, table_attr->instance, |
348 | &table_header); | |
1c8fce27 ZR |
349 | if (ACPI_FAILURE(status)) |
350 | return -ENODEV; | |
351 | ||
0de0e198 DW |
352 | rc = memory_read_from_buffer(buf, count, &offset, table_header, |
353 | table_header->length); | |
354 | acpi_put_table(table_header); | |
355 | return rc; | |
1c8fce27 ZR |
356 | } |
357 | ||
914c6194 LZ |
358 | static int acpi_table_attr_init(struct kobject *tables_obj, |
359 | struct acpi_table_attr *table_attr, | |
360 | struct acpi_table_header *table_header) | |
1c8fce27 ZR |
361 | { |
362 | struct acpi_table_header *header = NULL; | |
363 | struct acpi_table_attr *attr = NULL; | |
914c6194 | 364 | char instance_str[ACPI_INST_SIZE]; |
1c8fce27 ZR |
365 | |
366 | sysfs_attr_init(&table_attr->attr.attr); | |
914c6194 | 367 | ACPI_MOVE_NAME(table_attr->name, table_header->signature); |
1c8fce27 ZR |
368 | |
369 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
914c6194 | 370 | if (ACPI_COMPARE_NAME(table_attr->name, attr->name)) |
1c8fce27 ZR |
371 | if (table_attr->instance < attr->instance) |
372 | table_attr->instance = attr->instance; | |
373 | } | |
374 | table_attr->instance++; | |
914c6194 LZ |
375 | if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) { |
376 | pr_warn("%4.4s: too many table instances\n", | |
377 | table_attr->name); | |
378 | return -ERANGE; | |
379 | } | |
1c8fce27 | 380 | |
914c6194 LZ |
381 | ACPI_MOVE_NAME(table_attr->filename, table_header->signature); |
382 | table_attr->filename[ACPI_NAME_SIZE] = '\0'; | |
1c8fce27 ZR |
383 | if (table_attr->instance > 1 || (table_attr->instance == 1 && |
384 | !acpi_get_table | |
914c6194 LZ |
385 | (table_header->signature, 2, &header))) { |
386 | snprintf(instance_str, sizeof(instance_str), "%u", | |
387 | table_attr->instance); | |
388 | strcat(table_attr->filename, instance_str); | |
389 | } | |
1c8fce27 | 390 | |
083ca8c4 | 391 | table_attr->attr.size = table_header->length; |
1c8fce27 | 392 | table_attr->attr.read = acpi_table_show; |
914c6194 | 393 | table_attr->attr.attr.name = table_attr->filename; |
1c8fce27 ZR |
394 | table_attr->attr.attr.mode = 0400; |
395 | ||
914c6194 | 396 | return sysfs_create_bin_file(tables_obj, &table_attr->attr); |
1c8fce27 ZR |
397 | } |
398 | ||
68bdb677 | 399 | acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) |
1c8fce27 ZR |
400 | { |
401 | struct acpi_table_attr *table_attr; | |
402 | ||
403 | switch (event) { | |
307ecb0a | 404 | case ACPI_TABLE_EVENT_INSTALL: |
1c8fce27 ZR |
405 | table_attr = |
406 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
407 | if (!table_attr) | |
408 | return AE_NO_MEMORY; | |
409 | ||
914c6194 LZ |
410 | if (acpi_table_attr_init(dynamic_tables_kobj, |
411 | table_attr, table)) { | |
1c8fce27 ZR |
412 | kfree(table_attr); |
413 | return AE_ERROR; | |
914c6194 LZ |
414 | } |
415 | list_add_tail(&table_attr->node, &acpi_table_attr_list); | |
1c8fce27 | 416 | break; |
307ecb0a | 417 | case ACPI_TABLE_EVENT_LOAD: |
1c8fce27 | 418 | case ACPI_TABLE_EVENT_UNLOAD: |
307ecb0a | 419 | case ACPI_TABLE_EVENT_UNINSTALL: |
1c8fce27 ZR |
420 | /* |
421 | * we do not need to do anything right now | |
422 | * because the table is not deleted from the | |
423 | * global table list when unloading it. | |
424 | */ | |
425 | break; | |
426 | default: | |
427 | return AE_BAD_PARAMETER; | |
428 | } | |
429 | return AE_OK; | |
430 | } | |
431 | ||
7dae6326 TL |
432 | static ssize_t acpi_data_show(struct file *filp, struct kobject *kobj, |
433 | struct bin_attribute *bin_attr, char *buf, | |
434 | loff_t offset, size_t count) | |
435 | { | |
436 | struct acpi_data_attr *data_attr; | |
437 | void __iomem *base; | |
438 | ssize_t rc; | |
439 | ||
440 | data_attr = container_of(bin_attr, struct acpi_data_attr, attr); | |
441 | ||
442 | base = acpi_os_map_memory(data_attr->addr, data_attr->attr.size); | |
443 | if (!base) | |
444 | return -ENOMEM; | |
445 | rc = memory_read_from_buffer(buf, count, &offset, base, | |
446 | data_attr->attr.size); | |
447 | acpi_os_unmap_memory(base, data_attr->attr.size); | |
448 | ||
449 | return rc; | |
450 | } | |
451 | ||
452 | static int acpi_bert_data_init(void *th, struct acpi_data_attr *data_attr) | |
453 | { | |
454 | struct acpi_table_bert *bert = th; | |
455 | ||
456 | if (bert->header.length < sizeof(struct acpi_table_bert) || | |
457 | bert->region_length < sizeof(struct acpi_hest_generic_status)) { | |
458 | kfree(data_attr); | |
459 | return -EINVAL; | |
460 | } | |
461 | data_attr->addr = bert->address; | |
462 | data_attr->attr.size = bert->region_length; | |
463 | data_attr->attr.attr.name = "BERT"; | |
464 | ||
465 | return sysfs_create_bin_file(tables_data_kobj, &data_attr->attr); | |
466 | } | |
467 | ||
468 | static struct acpi_data_obj { | |
469 | char *name; | |
470 | int (*fn)(void *, struct acpi_data_attr *); | |
471 | } acpi_data_objs[] = { | |
472 | { ACPI_SIG_BERT, acpi_bert_data_init }, | |
473 | }; | |
474 | ||
475 | #define NUM_ACPI_DATA_OBJS ARRAY_SIZE(acpi_data_objs) | |
476 | ||
477 | static int acpi_table_data_init(struct acpi_table_header *th) | |
478 | { | |
479 | struct acpi_data_attr *data_attr; | |
480 | int i; | |
481 | ||
482 | for (i = 0; i < NUM_ACPI_DATA_OBJS; i++) { | |
483 | if (ACPI_COMPARE_NAME(th->signature, acpi_data_objs[i].name)) { | |
484 | data_attr = kzalloc(sizeof(*data_attr), GFP_KERNEL); | |
485 | if (!data_attr) | |
486 | return -ENOMEM; | |
487 | sysfs_attr_init(&data_attr->attr.attr); | |
488 | data_attr->attr.read = acpi_data_show; | |
489 | data_attr->attr.attr.mode = 0400; | |
490 | return acpi_data_objs[i].fn(th, data_attr); | |
491 | } | |
492 | } | |
493 | return 0; | |
494 | } | |
495 | ||
1c8fce27 ZR |
496 | static int acpi_tables_sysfs_init(void) |
497 | { | |
498 | struct acpi_table_attr *table_attr; | |
499 | struct acpi_table_header *table_header = NULL; | |
de03beed JC |
500 | int table_index; |
501 | acpi_status status; | |
502 | int ret; | |
1c8fce27 ZR |
503 | |
504 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); | |
505 | if (!tables_kobj) | |
506 | goto err; | |
507 | ||
7dae6326 TL |
508 | tables_data_kobj = kobject_create_and_add("data", tables_kobj); |
509 | if (!tables_data_kobj) | |
510 | goto err_tables_data; | |
511 | ||
1c8fce27 ZR |
512 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); |
513 | if (!dynamic_tables_kobj) | |
514 | goto err_dynamic_tables; | |
515 | ||
de03beed JC |
516 | for (table_index = 0;; table_index++) { |
517 | status = acpi_get_table_by_index(table_index, &table_header); | |
518 | ||
519 | if (status == AE_BAD_PARAMETER) | |
520 | break; | |
521 | ||
522 | if (ACPI_FAILURE(status)) | |
523 | continue; | |
524 | ||
de03beed JC |
525 | table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); |
526 | if (!table_attr) | |
527 | return -ENOMEM; | |
528 | ||
914c6194 LZ |
529 | ret = acpi_table_attr_init(tables_kobj, |
530 | table_attr, table_header); | |
de03beed JC |
531 | if (ret) { |
532 | kfree(table_attr); | |
533 | return ret; | |
1c8fce27 | 534 | } |
de03beed | 535 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
7dae6326 | 536 | acpi_table_data_init(table_header); |
de03beed JC |
537 | } |
538 | ||
1c8fce27 | 539 | kobject_uevent(tables_kobj, KOBJ_ADD); |
7dae6326 | 540 | kobject_uevent(tables_data_kobj, KOBJ_ADD); |
1c8fce27 | 541 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); |
1c8fce27 | 542 | |
68bdb677 | 543 | return 0; |
1c8fce27 | 544 | err_dynamic_tables: |
7dae6326 TL |
545 | kobject_put(tables_data_kobj); |
546 | err_tables_data: | |
1c8fce27 ZR |
547 | kobject_put(tables_kobj); |
548 | err: | |
549 | return -ENOMEM; | |
550 | } | |
551 | ||
552 | /* | |
553 | * Detailed ACPI IRQ counters: | |
554 | * /sys/firmware/acpi/interrupts/ | |
555 | */ | |
556 | ||
557 | u32 acpi_irq_handled; | |
558 | u32 acpi_irq_not_handled; | |
559 | ||
560 | #define COUNT_GPE 0 | |
561 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
562 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ | |
563 | #define COUNT_ERROR 3 /* other */ | |
564 | #define NUM_COUNTERS_EXTRA 4 | |
565 | ||
566 | struct event_counter { | |
567 | u32 count; | |
568 | u32 flags; | |
569 | }; | |
570 | ||
571 | static struct event_counter *all_counters; | |
572 | static u32 num_gpes; | |
573 | static u32 num_counters; | |
574 | static struct attribute **all_attrs; | |
575 | static u32 acpi_gpe_count; | |
576 | ||
577 | static struct attribute_group interrupt_stats_attr_group = { | |
578 | .name = "interrupts", | |
579 | }; | |
580 | ||
581 | static struct kobj_attribute *counter_attrs; | |
582 | ||
583 | static void delete_gpe_attr_array(void) | |
584 | { | |
585 | struct event_counter *tmp = all_counters; | |
586 | ||
587 | all_counters = NULL; | |
588 | kfree(tmp); | |
589 | ||
590 | if (counter_attrs) { | |
591 | int i; | |
592 | ||
593 | for (i = 0; i < num_gpes; i++) | |
594 | kfree(counter_attrs[i].attr.name); | |
595 | ||
596 | kfree(counter_attrs); | |
597 | } | |
598 | kfree(all_attrs); | |
599 | ||
600 | return; | |
601 | } | |
602 | ||
a0fcdb23 | 603 | static void gpe_count(u32 gpe_number) |
1c8fce27 ZR |
604 | { |
605 | acpi_gpe_count++; | |
606 | ||
607 | if (!all_counters) | |
608 | return; | |
609 | ||
610 | if (gpe_number < num_gpes) | |
611 | all_counters[gpe_number].count++; | |
612 | else | |
613 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
614 | COUNT_ERROR].count++; | |
615 | ||
616 | return; | |
617 | } | |
618 | ||
a0fcdb23 | 619 | static void fixed_event_count(u32 event_number) |
1c8fce27 ZR |
620 | { |
621 | if (!all_counters) | |
622 | return; | |
623 | ||
624 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
625 | all_counters[num_gpes + event_number].count++; | |
626 | else | |
627 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
628 | COUNT_ERROR].count++; | |
629 | ||
630 | return; | |
631 | } | |
632 | ||
644ef74e | 633 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, |
a0fcdb23 LM |
634 | u32 event_number, void *context) |
635 | { | |
7db8d1d9 | 636 | if (event_type == ACPI_EVENT_TYPE_GPE) { |
a0fcdb23 | 637 | gpe_count(event_number); |
7db8d1d9 RW |
638 | pr_debug("GPE event 0x%02x\n", event_number); |
639 | } else if (event_type == ACPI_EVENT_TYPE_FIXED) { | |
a0fcdb23 | 640 | fixed_event_count(event_number); |
7db8d1d9 RW |
641 | pr_debug("Fixed event 0x%02x\n", event_number); |
642 | } else { | |
643 | pr_debug("Other event 0x%02x\n", event_number); | |
644 | } | |
a0fcdb23 LM |
645 | } |
646 | ||
1c8fce27 ZR |
647 | static int get_status(u32 index, acpi_event_status *status, |
648 | acpi_handle *handle) | |
649 | { | |
f18ebc21 | 650 | int result; |
1c8fce27 ZR |
651 | |
652 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
f18ebc21 | 653 | return -EINVAL; |
1c8fce27 ZR |
654 | |
655 | if (index < num_gpes) { | |
656 | result = acpi_get_gpe_device(index, handle); | |
657 | if (result) { | |
658 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
c6284237 | 659 | "Invalid GPE 0x%x", index)); |
f18ebc21 | 660 | return result; |
1c8fce27 ZR |
661 | } |
662 | result = acpi_get_gpe_status(*handle, index, status); | |
663 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
664 | result = acpi_get_event_status(index - num_gpes, status); | |
665 | ||
1c8fce27 ZR |
666 | return result; |
667 | } | |
668 | ||
669 | static ssize_t counter_show(struct kobject *kobj, | |
670 | struct kobj_attribute *attr, char *buf) | |
671 | { | |
672 | int index = attr - counter_attrs; | |
673 | int size; | |
674 | acpi_handle handle; | |
675 | acpi_event_status status; | |
676 | int result = 0; | |
677 | ||
678 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
679 | acpi_irq_handled; | |
680 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = | |
681 | acpi_irq_not_handled; | |
682 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = | |
683 | acpi_gpe_count; | |
7b1a1322 | 684 | size = sprintf(buf, "%8u", all_counters[index].count); |
1c8fce27 ZR |
685 | |
686 | /* "gpe_all" or "sci" */ | |
687 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
688 | goto end; | |
689 | ||
690 | result = get_status(index, &status, &handle); | |
691 | if (result) | |
692 | goto end; | |
693 | ||
18864cc4 LZ |
694 | if (status & ACPI_EVENT_FLAG_ENABLE_SET) |
695 | size += sprintf(buf + size, " EN"); | |
696 | else | |
697 | size += sprintf(buf + size, " "); | |
698 | if (status & ACPI_EVENT_FLAG_STATUS_SET) | |
699 | size += sprintf(buf + size, " STS"); | |
700 | else | |
701 | size += sprintf(buf + size, " "); | |
702 | ||
2f857234 | 703 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) |
18864cc4 | 704 | size += sprintf(buf + size, " invalid "); |
1c8fce27 | 705 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
18864cc4 | 706 | size += sprintf(buf + size, " enabled "); |
1c8fce27 | 707 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) |
18864cc4 | 708 | size += sprintf(buf + size, " wake_enabled"); |
1c8fce27 | 709 | else |
18864cc4 LZ |
710 | size += sprintf(buf + size, " disabled "); |
711 | if (status & ACPI_EVENT_FLAG_MASKED) | |
712 | size += sprintf(buf + size, " masked "); | |
713 | else | |
714 | size += sprintf(buf + size, " unmasked"); | |
1c8fce27 ZR |
715 | |
716 | end: | |
717 | size += sprintf(buf + size, "\n"); | |
718 | return result ? result : size; | |
719 | } | |
720 | ||
721 | /* | |
722 | * counter_set() sets the specified counter. | |
723 | * setting the total "sci" file to any value clears all counters. | |
724 | * enable/disable/clear a gpe/fixed event in user space. | |
725 | */ | |
726 | static ssize_t counter_set(struct kobject *kobj, | |
727 | struct kobj_attribute *attr, const char *buf, | |
728 | size_t size) | |
729 | { | |
730 | int index = attr - counter_attrs; | |
731 | acpi_event_status status; | |
732 | acpi_handle handle; | |
733 | int result = 0; | |
c48b1565 | 734 | unsigned long tmp; |
1c8fce27 ZR |
735 | |
736 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
737 | int i; | |
738 | for (i = 0; i < num_counters; ++i) | |
739 | all_counters[i].count = 0; | |
740 | acpi_gpe_count = 0; | |
741 | acpi_irq_handled = 0; | |
742 | acpi_irq_not_handled = 0; | |
743 | goto end; | |
744 | } | |
745 | ||
746 | /* show the event status for both GPEs and Fixed Events */ | |
747 | result = get_status(index, &status, &handle); | |
748 | if (result) | |
749 | goto end; | |
750 | ||
2f857234 | 751 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { |
1c8fce27 ZR |
752 | printk(KERN_WARNING PREFIX |
753 | "Can not change Invalid GPE/Fixed Event status\n"); | |
754 | return -EINVAL; | |
755 | } | |
756 | ||
757 | if (index < num_gpes) { | |
758 | if (!strcmp(buf, "disable\n") && | |
759 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
760 | result = acpi_disable_gpe(handle, index); | |
761 | else if (!strcmp(buf, "enable\n") && | |
762 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
763 | result = acpi_enable_gpe(handle, index); | |
764 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 765 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 766 | result = acpi_clear_gpe(handle, index); |
18864cc4 LZ |
767 | else if (!strcmp(buf, "mask\n")) |
768 | result = acpi_mask_gpe(handle, index, TRUE); | |
769 | else if (!strcmp(buf, "unmask\n")) | |
770 | result = acpi_mask_gpe(handle, index, FALSE); | |
c48b1565 LT |
771 | else if (!kstrtoul(buf, 0, &tmp)) |
772 | all_counters[index].count = tmp; | |
1c8fce27 | 773 | else |
c48b1565 | 774 | result = -EINVAL; |
1c8fce27 ZR |
775 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { |
776 | int event = index - num_gpes; | |
777 | if (!strcmp(buf, "disable\n") && | |
18864cc4 | 778 | (status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
779 | result = acpi_disable_event(event, ACPI_NOT_ISR); |
780 | else if (!strcmp(buf, "enable\n") && | |
18864cc4 | 781 | !(status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
782 | result = acpi_enable_event(event, ACPI_NOT_ISR); |
783 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 784 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 785 | result = acpi_clear_event(event); |
c48b1565 LT |
786 | else if (!kstrtoul(buf, 0, &tmp)) |
787 | all_counters[index].count = tmp; | |
1c8fce27 | 788 | else |
c48b1565 | 789 | result = -EINVAL; |
1c8fce27 ZR |
790 | } else |
791 | all_counters[index].count = strtoul(buf, NULL, 0); | |
792 | ||
793 | if (ACPI_FAILURE(result)) | |
794 | result = -EINVAL; | |
795 | end: | |
796 | return result ? result : size; | |
797 | } | |
798 | ||
9c4aa1ee LZ |
799 | /* |
800 | * A Quirk Mechanism for GPE Flooding Prevention: | |
801 | * | |
802 | * Quirks may be needed to prevent GPE flooding on a specific GPE. The | |
803 | * flooding typically cannot be detected and automatically prevented by | |
804 | * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in | |
805 | * the AML tables. This normally indicates a feature gap in Linux, thus | |
806 | * instead of providing endless quirk tables, we provide a boot parameter | |
807 | * for those who want this quirk. For example, if the users want to prevent | |
808 | * the GPE flooding for GPE 00, they need to specify the following boot | |
809 | * parameter: | |
810 | * acpi_mask_gpe=0x00 | |
811 | * The masking status can be modified by the following runtime controlling | |
812 | * interface: | |
813 | * echo unmask > /sys/firmware/acpi/interrupts/gpe00 | |
814 | */ | |
815 | ||
816 | /* | |
817 | * Currently, the GPE flooding prevention only supports to mask the GPEs | |
818 | * numbered from 00 to 7f. | |
819 | */ | |
820 | #define ACPI_MASKABLE_GPE_MAX 0x80 | |
821 | ||
822 | static u64 __initdata acpi_masked_gpes; | |
823 | ||
824 | static int __init acpi_gpe_set_masked_gpes(char *val) | |
825 | { | |
826 | u8 gpe; | |
827 | ||
828 | if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX) | |
829 | return -EINVAL; | |
830 | acpi_masked_gpes |= ((u64)1<<gpe); | |
831 | ||
832 | return 1; | |
833 | } | |
834 | __setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes); | |
835 | ||
836 | void __init acpi_gpe_apply_masked_gpes(void) | |
837 | { | |
838 | acpi_handle handle; | |
839 | acpi_status status; | |
840 | u8 gpe; | |
841 | ||
842 | for (gpe = 0; | |
843 | gpe < min_t(u8, ACPI_MASKABLE_GPE_MAX, acpi_current_gpe_count); | |
844 | gpe++) { | |
845 | if (acpi_masked_gpes & ((u64)1<<gpe)) { | |
846 | status = acpi_get_gpe_device(gpe, &handle); | |
847 | if (ACPI_SUCCESS(status)) { | |
848 | pr_info("Masking GPE 0x%x.\n", gpe); | |
849 | (void)acpi_mask_gpe(handle, gpe, TRUE); | |
850 | } | |
851 | } | |
852 | } | |
853 | } | |
854 | ||
1c8fce27 ZR |
855 | void acpi_irq_stats_init(void) |
856 | { | |
a0fcdb23 | 857 | acpi_status status; |
1c8fce27 ZR |
858 | int i; |
859 | ||
860 | if (all_counters) | |
861 | return; | |
862 | ||
863 | num_gpes = acpi_current_gpe_count; | |
864 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
865 | ||
866 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
867 | GFP_KERNEL); | |
868 | if (all_attrs == NULL) | |
869 | return; | |
870 | ||
871 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), | |
872 | GFP_KERNEL); | |
873 | if (all_counters == NULL) | |
874 | goto fail; | |
875 | ||
644ef74e | 876 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); |
a0fcdb23 LM |
877 | if (ACPI_FAILURE(status)) |
878 | goto fail; | |
879 | ||
1c8fce27 ZR |
880 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), |
881 | GFP_KERNEL); | |
882 | if (counter_attrs == NULL) | |
883 | goto fail; | |
884 | ||
885 | for (i = 0; i < num_counters; ++i) { | |
886 | char buffer[12]; | |
887 | char *name; | |
888 | ||
889 | if (i < num_gpes) | |
890 | sprintf(buffer, "gpe%02X", i); | |
891 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
892 | sprintf(buffer, "ff_pmtimer"); | |
893 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
894 | sprintf(buffer, "ff_gbl_lock"); | |
895 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
896 | sprintf(buffer, "ff_pwr_btn"); | |
897 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
898 | sprintf(buffer, "ff_slp_btn"); | |
899 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
900 | sprintf(buffer, "ff_rt_clk"); | |
901 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
902 | sprintf(buffer, "gpe_all"); | |
903 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
904 | sprintf(buffer, "sci"); | |
905 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) | |
906 | sprintf(buffer, "sci_not"); | |
907 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
908 | sprintf(buffer, "error"); | |
909 | else | |
910 | sprintf(buffer, "bug%02X", i); | |
911 | ||
096a8aac | 912 | name = kstrdup(buffer, GFP_KERNEL); |
1c8fce27 ZR |
913 | if (name == NULL) |
914 | goto fail; | |
1c8fce27 ZR |
915 | |
916 | sysfs_attr_init(&counter_attrs[i].attr); | |
917 | counter_attrs[i].attr.name = name; | |
918 | counter_attrs[i].attr.mode = 0644; | |
919 | counter_attrs[i].show = counter_show; | |
920 | counter_attrs[i].store = counter_set; | |
921 | ||
922 | all_attrs[i] = &counter_attrs[i].attr; | |
923 | } | |
924 | ||
925 | interrupt_stats_attr_group.attrs = all_attrs; | |
926 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) | |
927 | return; | |
928 | ||
929 | fail: | |
930 | delete_gpe_attr_array(); | |
931 | return; | |
932 | } | |
933 | ||
934 | static void __exit interrupt_stats_exit(void) | |
935 | { | |
936 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
937 | ||
938 | delete_gpe_attr_array(); | |
939 | ||
940 | return; | |
941 | } | |
942 | ||
362b6460 TR |
943 | static ssize_t |
944 | acpi_show_profile(struct device *dev, struct device_attribute *attr, | |
945 | char *buf) | |
946 | { | |
947 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); | |
948 | } | |
949 | ||
950 | static const struct device_attribute pm_profile_attr = | |
951 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); | |
952 | ||
3f8055c3 RW |
953 | static ssize_t hotplug_enabled_show(struct kobject *kobj, |
954 | struct kobj_attribute *attr, char *buf) | |
955 | { | |
956 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
957 | ||
958 | return sprintf(buf, "%d\n", hotplug->enabled); | |
959 | } | |
960 | ||
961 | static ssize_t hotplug_enabled_store(struct kobject *kobj, | |
962 | struct kobj_attribute *attr, | |
963 | const char *buf, size_t size) | |
964 | { | |
965 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
966 | unsigned int val; | |
967 | ||
968 | if (kstrtouint(buf, 10, &val) || val > 1) | |
969 | return -EINVAL; | |
970 | ||
971 | acpi_scan_hotplug_enabled(hotplug, val); | |
972 | return size; | |
973 | } | |
974 | ||
975 | static struct kobj_attribute hotplug_enabled_attr = | |
976 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, | |
977 | hotplug_enabled_store); | |
978 | ||
979 | static struct attribute *hotplug_profile_attrs[] = { | |
980 | &hotplug_enabled_attr.attr, | |
981 | NULL | |
982 | }; | |
983 | ||
b09753ec | 984 | static struct kobj_type acpi_hotplug_profile_ktype = { |
3f8055c3 RW |
985 | .sysfs_ops = &kobj_sysfs_ops, |
986 | .default_attrs = hotplug_profile_attrs, | |
987 | }; | |
988 | ||
989 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, | |
990 | const char *name) | |
991 | { | |
992 | int error; | |
993 | ||
994 | if (!hotplug_kobj) | |
995 | goto err_out; | |
996 | ||
acd3e2c9 BH |
997 | error = kobject_init_and_add(&hotplug->kobj, |
998 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); | |
3f8055c3 RW |
999 | if (error) |
1000 | goto err_out; | |
1001 | ||
1002 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); | |
1003 | return; | |
1004 | ||
1005 | err_out: | |
1006 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); | |
1007 | } | |
1008 | ||
683058e3 RW |
1009 | static ssize_t force_remove_show(struct kobject *kobj, |
1010 | struct kobj_attribute *attr, char *buf) | |
1011 | { | |
ffc10d82 | 1012 | return sprintf(buf, "%d\n", 0); |
683058e3 RW |
1013 | } |
1014 | ||
1015 | static ssize_t force_remove_store(struct kobject *kobj, | |
1016 | struct kobj_attribute *attr, | |
1017 | const char *buf, size_t size) | |
1018 | { | |
1019 | bool val; | |
1020 | int ret; | |
1021 | ||
1022 | ret = strtobool(buf, &val); | |
1023 | if (ret < 0) | |
1024 | return ret; | |
1025 | ||
ffc10d82 MH |
1026 | if (val) { |
1027 | pr_err("Enabling force_remove is not supported anymore. Please report to linux-acpi@vger.kernel.org if you depend on this functionality\n"); | |
1028 | return -EINVAL; | |
1029 | } | |
683058e3 RW |
1030 | return size; |
1031 | } | |
1032 | ||
1033 | static const struct kobj_attribute force_remove_attr = | |
1034 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, | |
1035 | force_remove_store); | |
1036 | ||
1c8fce27 ZR |
1037 | int __init acpi_sysfs_init(void) |
1038 | { | |
1039 | int result; | |
1040 | ||
1041 | result = acpi_tables_sysfs_init(); | |
362b6460 TR |
1042 | if (result) |
1043 | return result; | |
3f8055c3 RW |
1044 | |
1045 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); | |
bc1e49df IY |
1046 | if (!hotplug_kobj) |
1047 | return -ENOMEM; | |
1048 | ||
683058e3 RW |
1049 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); |
1050 | if (result) | |
1051 | return result; | |
1052 | ||
362b6460 | 1053 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); |
1c8fce27 ZR |
1054 | return result; |
1055 | } |