Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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> |
Lv Zheng | 8b48463 | 2013-12-03 08:49:16 +0800 | [diff] [blame] | 8 | #include <linux/acpi.h> |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 9 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 10 | #include "internal.h" |
| 11 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 12 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
| 13 | ACPI_MODULE_NAME("sysfs"); |
| 14 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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), |
Lv Zheng | 93d9883 | 2015-08-05 16:23:43 +0800 | [diff] [blame] | 72 | ACPI_DEBUG_INIT(ACPI_LV_REPAIR), |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 73 | ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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 | |
Zhang Rui | ec652b3 | 2010-08-30 14:08:02 +0800 | [diff] [blame] | 105 | static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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 | |
Zhang Rui | ec652b3 | 2010-08-30 14:08:02 +0800 | [diff] [blame] | 133 | static int param_get_debug_level(char *buffer, const struct kernel_param *kp) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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 | |
Vasiliy Kulikov | 9c8b04b | 2011-06-25 21:07:52 +0400 | [diff] [blame] | 154 | static const struct kernel_param_ops param_ops_debug_layer = { |
Zhang Rui | ec652b3 | 2010-08-30 14:08:02 +0800 | [diff] [blame] | 155 | .set = param_set_uint, |
| 156 | .get = param_get_debug_layer, |
| 157 | }; |
| 158 | |
Vasiliy Kulikov | 9c8b04b | 2011-06-25 21:07:52 +0400 | [diff] [blame] | 159 | static const struct kernel_param_ops param_ops_debug_level = { |
Zhang Rui | ec652b3 | 2010-08-30 14:08:02 +0800 | [diff] [blame] | 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); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 166 | |
Lv Zheng | a0186bc | 2015-08-05 16:23:57 +0800 | [diff] [blame] | 167 | static char trace_method_name[1024]; |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 168 | |
| 169 | int param_set_trace_method_name(const char *val, const struct kernel_param *kp) |
| 170 | { |
| 171 | u32 saved_flags = 0; |
Lv Zheng | a0186bc | 2015-08-05 16:23:57 +0800 | [diff] [blame] | 172 | bool is_abs_path = true; |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 173 | |
Lv Zheng | a0186bc | 2015-08-05 16:23:57 +0800 | [diff] [blame] | 174 | if (*val != '\\') |
| 175 | is_abs_path = false; |
| 176 | |
| 177 | if ((is_abs_path && strlen(val) > 1023) || |
| 178 | (!is_abs_path && strlen(val) > 1022)) { |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 179 | pr_err("%s: string parameter too long\n", kp->name); |
| 180 | return -ENOSPC; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * It's not safe to update acpi_gbl_trace_method_name without |
| 185 | * having the tracer stopped, so we save the original tracer |
| 186 | * state and disable it. |
| 187 | */ |
| 188 | saved_flags = acpi_gbl_trace_flags; |
| 189 | (void)acpi_debug_trace(NULL, |
| 190 | acpi_gbl_trace_dbg_level, |
| 191 | acpi_gbl_trace_dbg_layer, |
| 192 | 0); |
| 193 | |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 194 | /* This is a hack. We can't kmalloc in early boot. */ |
Lv Zheng | a0186bc | 2015-08-05 16:23:57 +0800 | [diff] [blame] | 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 | } |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 201 | |
| 202 | /* Restore the original tracer state */ |
| 203 | (void)acpi_debug_trace(trace_method_name, |
| 204 | acpi_gbl_trace_dbg_level, |
| 205 | acpi_gbl_trace_dbg_layer, |
| 206 | saved_flags); |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp) |
| 212 | { |
| 213 | return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name); |
| 214 | } |
| 215 | |
| 216 | static const struct kernel_param_ops param_ops_trace_method = { |
| 217 | .set = param_set_trace_method_name, |
| 218 | .get = param_get_trace_method_name, |
| 219 | }; |
| 220 | |
| 221 | static const struct kernel_param_ops param_ops_trace_attrib = { |
| 222 | .set = param_set_uint, |
| 223 | .get = param_get_uint, |
| 224 | }; |
| 225 | |
| 226 | module_param_cb(trace_method_name, ¶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); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 229 | |
Kees Cook | 24da2c8 | 2017-10-17 19:04:42 -0700 | [diff] [blame] | 230 | static int param_set_trace_state(const char *val, |
| 231 | const struct kernel_param *kp) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 232 | { |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 233 | acpi_status status; |
| 234 | const char *method = trace_method_name; |
| 235 | u32 flags = 0; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 236 | |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 237 | /* So "xxx-once" comparison should go prior than "xxx" comparison */ |
| 238 | #define acpi_compare_param(val, key) \ |
| 239 | strncmp((val), (key), sizeof(key) - 1) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 240 | |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 241 | if (!acpi_compare_param(val, "enable")) { |
| 242 | method = NULL; |
| 243 | flags = ACPI_TRACE_ENABLED; |
| 244 | } else if (!acpi_compare_param(val, "disable")) |
| 245 | method = NULL; |
| 246 | else if (!acpi_compare_param(val, "method-once")) |
| 247 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT; |
| 248 | else if (!acpi_compare_param(val, "method")) |
| 249 | flags = ACPI_TRACE_ENABLED; |
| 250 | else if (!acpi_compare_param(val, "opcode-once")) |
| 251 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE; |
| 252 | else if (!acpi_compare_param(val, "opcode")) |
| 253 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE; |
| 254 | else |
| 255 | return -EINVAL; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 256 | |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 257 | status = acpi_debug_trace(method, |
| 258 | acpi_gbl_trace_dbg_level, |
| 259 | acpi_gbl_trace_dbg_layer, |
| 260 | flags); |
| 261 | if (ACPI_FAILURE(status)) |
| 262 | return -EBUSY; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 263 | |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 264 | return 0; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 265 | } |
| 266 | |
Kees Cook | 24da2c8 | 2017-10-17 19:04:42 -0700 | [diff] [blame] | 267 | static int param_get_trace_state(char *buffer, const struct kernel_param *kp) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 268 | { |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 269 | if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 270 | return sprintf(buffer, "disable"); |
| 271 | else { |
Lv Zheng | 7901a05 | 2015-08-05 16:23:51 +0800 | [diff] [blame] | 272 | if (acpi_gbl_trace_method_name) { |
| 273 | if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) |
| 274 | return sprintf(buffer, "method-once"); |
| 275 | else |
| 276 | return sprintf(buffer, "method"); |
| 277 | } else |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 278 | return sprintf(buffer, "enable"); |
| 279 | } |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, |
| 284 | NULL, 0644); |
| 285 | #endif /* CONFIG_ACPI_DEBUG */ |
| 286 | |
Thomas Renninger | aecad432 | 2011-05-26 12:26:23 +0200 | [diff] [blame] | 287 | |
| 288 | /* /sys/modules/acpi/parameters/aml_debug_output */ |
| 289 | |
| 290 | module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, |
Lv Zheng | 481c138 | 2014-01-24 08:49:51 +0800 | [diff] [blame] | 291 | byte, 0644); |
Thomas Renninger | aecad432 | 2011-05-26 12:26:23 +0200 | [diff] [blame] | 292 | MODULE_PARM_DESC(aml_debug_output, |
| 293 | "To enable/disable the ACPI Debug Object output."); |
| 294 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 295 | /* /sys/module/acpi/parameters/acpica_version */ |
Kees Cook | 24da2c8 | 2017-10-17 19:04:42 -0700 | [diff] [blame] | 296 | static int param_get_acpica_version(char *buffer, |
| 297 | const struct kernel_param *kp) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 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/ |
| 311 | * /sys/firmware/acpi/tables/dynamic/ |
| 312 | */ |
| 313 | |
| 314 | static LIST_HEAD(acpi_table_attr_list); |
| 315 | static struct kobject *tables_kobj; |
| 316 | static struct kobject *dynamic_tables_kobj; |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 317 | static struct kobject *hotplug_kobj; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 318 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 319 | #define ACPI_MAX_TABLE_INSTANCES 999 |
| 320 | #define ACPI_INST_SIZE 4 /* including trailing 0 */ |
| 321 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 322 | struct acpi_table_attr { |
| 323 | struct bin_attribute attr; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 324 | char name[ACPI_NAME_SIZE]; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 325 | int instance; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 326 | char filename[ACPI_NAME_SIZE+ACPI_INST_SIZE]; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 327 | struct list_head node; |
| 328 | }; |
| 329 | |
| 330 | static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, |
| 331 | struct bin_attribute *bin_attr, char *buf, |
| 332 | loff_t offset, size_t count) |
| 333 | { |
| 334 | struct acpi_table_attr *table_attr = |
| 335 | container_of(bin_attr, struct acpi_table_attr, attr); |
| 336 | struct acpi_table_header *table_header = NULL; |
| 337 | acpi_status status; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 338 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 339 | status = acpi_get_table(table_attr->name, table_attr->instance, |
| 340 | &table_header); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 341 | if (ACPI_FAILURE(status)) |
| 342 | return -ENODEV; |
| 343 | |
| 344 | return memory_read_from_buffer(buf, count, &offset, |
| 345 | table_header, table_header->length); |
| 346 | } |
| 347 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 348 | static int acpi_table_attr_init(struct kobject *tables_obj, |
| 349 | struct acpi_table_attr *table_attr, |
| 350 | struct acpi_table_header *table_header) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 351 | { |
| 352 | struct acpi_table_header *header = NULL; |
| 353 | struct acpi_table_attr *attr = NULL; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 354 | char instance_str[ACPI_INST_SIZE]; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 355 | |
| 356 | sysfs_attr_init(&table_attr->attr.attr); |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 357 | ACPI_MOVE_NAME(table_attr->name, table_header->signature); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 358 | |
| 359 | list_for_each_entry(attr, &acpi_table_attr_list, node) { |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 360 | if (ACPI_COMPARE_NAME(table_attr->name, attr->name)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 361 | if (table_attr->instance < attr->instance) |
| 362 | table_attr->instance = attr->instance; |
| 363 | } |
| 364 | table_attr->instance++; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 365 | if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) { |
| 366 | pr_warn("%4.4s: too many table instances\n", |
| 367 | table_attr->name); |
| 368 | return -ERANGE; |
| 369 | } |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 370 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 371 | ACPI_MOVE_NAME(table_attr->filename, table_header->signature); |
| 372 | table_attr->filename[ACPI_NAME_SIZE] = '\0'; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 373 | if (table_attr->instance > 1 || (table_attr->instance == 1 && |
| 374 | !acpi_get_table |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 375 | (table_header->signature, 2, &header))) { |
| 376 | snprintf(instance_str, sizeof(instance_str), "%u", |
| 377 | table_attr->instance); |
| 378 | strcat(table_attr->filename, instance_str); |
| 379 | } |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 380 | |
Daisuke HATAYAMA | 083ca8c | 2013-11-19 17:54:47 +0900 | [diff] [blame] | 381 | table_attr->attr.size = table_header->length; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 382 | table_attr->attr.read = acpi_table_show; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 383 | table_attr->attr.attr.name = table_attr->filename; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 384 | table_attr->attr.attr.mode = 0400; |
| 385 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 386 | return sysfs_create_bin_file(tables_obj, &table_attr->attr); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 387 | } |
| 388 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 389 | acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 390 | { |
| 391 | struct acpi_table_attr *table_attr; |
| 392 | |
| 393 | switch (event) { |
Lv Zheng | 307ecb0 | 2016-09-13 17:48:27 +0800 | [diff] [blame] | 394 | case ACPI_TABLE_EVENT_INSTALL: |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 395 | table_attr = |
| 396 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); |
| 397 | if (!table_attr) |
| 398 | return AE_NO_MEMORY; |
| 399 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 400 | if (acpi_table_attr_init(dynamic_tables_kobj, |
| 401 | table_attr, table)) { |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 402 | kfree(table_attr); |
| 403 | return AE_ERROR; |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 404 | } |
| 405 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 406 | break; |
Lv Zheng | 307ecb0 | 2016-09-13 17:48:27 +0800 | [diff] [blame] | 407 | case ACPI_TABLE_EVENT_LOAD: |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 408 | case ACPI_TABLE_EVENT_UNLOAD: |
Lv Zheng | 307ecb0 | 2016-09-13 17:48:27 +0800 | [diff] [blame] | 409 | case ACPI_TABLE_EVENT_UNINSTALL: |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 410 | /* |
| 411 | * we do not need to do anything right now |
| 412 | * because the table is not deleted from the |
| 413 | * global table list when unloading it. |
| 414 | */ |
| 415 | break; |
| 416 | default: |
| 417 | return AE_BAD_PARAMETER; |
| 418 | } |
| 419 | return AE_OK; |
| 420 | } |
| 421 | |
| 422 | static int acpi_tables_sysfs_init(void) |
| 423 | { |
| 424 | struct acpi_table_attr *table_attr; |
| 425 | struct acpi_table_header *table_header = NULL; |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 426 | int table_index; |
| 427 | acpi_status status; |
| 428 | int ret; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 429 | |
| 430 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
| 431 | if (!tables_kobj) |
| 432 | goto err; |
| 433 | |
| 434 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); |
| 435 | if (!dynamic_tables_kobj) |
| 436 | goto err_dynamic_tables; |
| 437 | |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 438 | for (table_index = 0;; table_index++) { |
| 439 | status = acpi_get_table_by_index(table_index, &table_header); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 440 | |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 441 | if (status == AE_BAD_PARAMETER) |
| 442 | break; |
| 443 | |
| 444 | if (ACPI_FAILURE(status)) |
| 445 | continue; |
| 446 | |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 447 | table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); |
| 448 | if (!table_attr) |
| 449 | return -ENOMEM; |
| 450 | |
Lv Zheng | 914c619 | 2016-09-13 17:48:34 +0800 | [diff] [blame] | 451 | ret = acpi_table_attr_init(tables_kobj, |
| 452 | table_attr, table_header); |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 453 | if (ret) { |
| 454 | kfree(table_attr); |
| 455 | return ret; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 456 | } |
Jeremy Compostella | de03bee | 2013-11-21 11:20:23 +0100 | [diff] [blame] | 457 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
| 458 | } |
| 459 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 460 | kobject_uevent(tables_kobj, KOBJ_ADD); |
| 461 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 462 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 463 | return 0; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 464 | err_dynamic_tables: |
| 465 | kobject_put(tables_kobj); |
| 466 | err: |
| 467 | return -ENOMEM; |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * Detailed ACPI IRQ counters: |
| 472 | * /sys/firmware/acpi/interrupts/ |
| 473 | */ |
| 474 | |
| 475 | u32 acpi_irq_handled; |
| 476 | u32 acpi_irq_not_handled; |
| 477 | |
| 478 | #define COUNT_GPE 0 |
| 479 | #define COUNT_SCI 1 /* acpi_irq_handled */ |
| 480 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ |
| 481 | #define COUNT_ERROR 3 /* other */ |
| 482 | #define NUM_COUNTERS_EXTRA 4 |
| 483 | |
| 484 | struct event_counter { |
| 485 | u32 count; |
| 486 | u32 flags; |
| 487 | }; |
| 488 | |
| 489 | static struct event_counter *all_counters; |
| 490 | static u32 num_gpes; |
| 491 | static u32 num_counters; |
| 492 | static struct attribute **all_attrs; |
| 493 | static u32 acpi_gpe_count; |
| 494 | |
| 495 | static struct attribute_group interrupt_stats_attr_group = { |
| 496 | .name = "interrupts", |
| 497 | }; |
| 498 | |
| 499 | static struct kobj_attribute *counter_attrs; |
| 500 | |
| 501 | static void delete_gpe_attr_array(void) |
| 502 | { |
| 503 | struct event_counter *tmp = all_counters; |
| 504 | |
| 505 | all_counters = NULL; |
| 506 | kfree(tmp); |
| 507 | |
| 508 | if (counter_attrs) { |
| 509 | int i; |
| 510 | |
| 511 | for (i = 0; i < num_gpes; i++) |
| 512 | kfree(counter_attrs[i].attr.name); |
| 513 | |
| 514 | kfree(counter_attrs); |
| 515 | } |
| 516 | kfree(all_attrs); |
| 517 | |
| 518 | return; |
| 519 | } |
| 520 | |
Lin Ming | a0fcdb2 | 2010-12-13 13:39:26 +0800 | [diff] [blame] | 521 | static void gpe_count(u32 gpe_number) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 522 | { |
| 523 | acpi_gpe_count++; |
| 524 | |
| 525 | if (!all_counters) |
| 526 | return; |
| 527 | |
| 528 | if (gpe_number < num_gpes) |
| 529 | all_counters[gpe_number].count++; |
| 530 | else |
| 531 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + |
| 532 | COUNT_ERROR].count++; |
| 533 | |
| 534 | return; |
| 535 | } |
| 536 | |
Lin Ming | a0fcdb2 | 2010-12-13 13:39:26 +0800 | [diff] [blame] | 537 | static void fixed_event_count(u32 event_number) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 538 | { |
| 539 | if (!all_counters) |
| 540 | return; |
| 541 | |
| 542 | if (event_number < ACPI_NUM_FIXED_EVENTS) |
| 543 | all_counters[num_gpes + event_number].count++; |
| 544 | else |
| 545 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + |
| 546 | COUNT_ERROR].count++; |
| 547 | |
| 548 | return; |
| 549 | } |
| 550 | |
Lv Zheng | 644ef74 | 2012-10-31 02:25:36 +0000 | [diff] [blame] | 551 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, |
Lin Ming | a0fcdb2 | 2010-12-13 13:39:26 +0800 | [diff] [blame] | 552 | u32 event_number, void *context) |
| 553 | { |
| 554 | if (event_type == ACPI_EVENT_TYPE_GPE) |
| 555 | gpe_count(event_number); |
| 556 | |
| 557 | if (event_type == ACPI_EVENT_TYPE_FIXED) |
| 558 | fixed_event_count(event_number); |
| 559 | } |
| 560 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 561 | static int get_status(u32 index, acpi_event_status *status, |
| 562 | acpi_handle *handle) |
| 563 | { |
Dan Carpenter | f18ebc2 | 2016-05-05 16:23:04 +0300 | [diff] [blame] | 564 | int result; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 565 | |
| 566 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) |
Dan Carpenter | f18ebc2 | 2016-05-05 16:23:04 +0300 | [diff] [blame] | 567 | return -EINVAL; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 568 | |
| 569 | if (index < num_gpes) { |
| 570 | result = acpi_get_gpe_device(index, handle); |
| 571 | if (result) { |
| 572 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, |
Colin Ian King | c628423 | 2012-11-29 11:53:14 +0000 | [diff] [blame] | 573 | "Invalid GPE 0x%x", index)); |
Dan Carpenter | f18ebc2 | 2016-05-05 16:23:04 +0300 | [diff] [blame] | 574 | return result; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 575 | } |
| 576 | result = acpi_get_gpe_status(*handle, index, status); |
| 577 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) |
| 578 | result = acpi_get_event_status(index - num_gpes, status); |
| 579 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 580 | return result; |
| 581 | } |
| 582 | |
| 583 | static ssize_t counter_show(struct kobject *kobj, |
| 584 | struct kobj_attribute *attr, char *buf) |
| 585 | { |
| 586 | int index = attr - counter_attrs; |
| 587 | int size; |
| 588 | acpi_handle handle; |
| 589 | acpi_event_status status; |
| 590 | int result = 0; |
| 591 | |
| 592 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = |
| 593 | acpi_irq_handled; |
| 594 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = |
| 595 | acpi_irq_not_handled; |
| 596 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
| 597 | acpi_gpe_count; |
Nan Li | 7b1a132 | 2015-03-04 18:48:35 +0800 | [diff] [blame] | 598 | size = sprintf(buf, "%8u", all_counters[index].count); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 599 | |
| 600 | /* "gpe_all" or "sci" */ |
| 601 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) |
| 602 | goto end; |
| 603 | |
| 604 | result = get_status(index, &status, &handle); |
| 605 | if (result) |
| 606 | goto end; |
| 607 | |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 608 | if (status & ACPI_EVENT_FLAG_ENABLE_SET) |
| 609 | size += sprintf(buf + size, " EN"); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 610 | else |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 611 | size += sprintf(buf + size, " "); |
| 612 | if (status & ACPI_EVENT_FLAG_STATUS_SET) |
| 613 | size += sprintf(buf + size, " STS"); |
| 614 | else |
| 615 | size += sprintf(buf + size, " "); |
| 616 | |
| 617 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) |
| 618 | size += sprintf(buf + size, " invalid "); |
| 619 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
| 620 | size += sprintf(buf + size, " enabled "); |
| 621 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) |
| 622 | size += sprintf(buf + size, " wake_enabled"); |
| 623 | else |
| 624 | size += sprintf(buf + size, " disabled "); |
| 625 | if (status & ACPI_EVENT_FLAG_MASKED) |
| 626 | size += sprintf(buf + size, " masked "); |
| 627 | else |
| 628 | size += sprintf(buf + size, " unmasked"); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 629 | |
| 630 | end: |
| 631 | size += sprintf(buf + size, "\n"); |
| 632 | return result ? result : size; |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * counter_set() sets the specified counter. |
| 637 | * setting the total "sci" file to any value clears all counters. |
| 638 | * enable/disable/clear a gpe/fixed event in user space. |
| 639 | */ |
| 640 | static ssize_t counter_set(struct kobject *kobj, |
| 641 | struct kobj_attribute *attr, const char *buf, |
| 642 | size_t size) |
| 643 | { |
| 644 | int index = attr - counter_attrs; |
| 645 | acpi_event_status status; |
| 646 | acpi_handle handle; |
| 647 | int result = 0; |
Lan Tianyu | c48b156 | 2013-09-12 03:32:05 -0400 | [diff] [blame] | 648 | unsigned long tmp; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 649 | |
| 650 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { |
| 651 | int i; |
| 652 | for (i = 0; i < num_counters; ++i) |
| 653 | all_counters[i].count = 0; |
| 654 | acpi_gpe_count = 0; |
| 655 | acpi_irq_handled = 0; |
| 656 | acpi_irq_not_handled = 0; |
| 657 | goto end; |
| 658 | } |
| 659 | |
| 660 | /* show the event status for both GPEs and Fixed Events */ |
| 661 | result = get_status(index, &status, &handle); |
| 662 | if (result) |
| 663 | goto end; |
| 664 | |
Lv Zheng | 2f85723 | 2014-10-10 10:40:05 +0800 | [diff] [blame] | 665 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 666 | printk(KERN_WARNING PREFIX |
| 667 | "Can not change Invalid GPE/Fixed Event status\n"); |
| 668 | return -EINVAL; |
| 669 | } |
| 670 | |
| 671 | if (index < num_gpes) { |
| 672 | if (!strcmp(buf, "disable\n") && |
| 673 | (status & ACPI_EVENT_FLAG_ENABLED)) |
| 674 | result = acpi_disable_gpe(handle, index); |
| 675 | else if (!strcmp(buf, "enable\n") && |
| 676 | !(status & ACPI_EVENT_FLAG_ENABLED)) |
| 677 | result = acpi_enable_gpe(handle, index); |
| 678 | else if (!strcmp(buf, "clear\n") && |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 679 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 680 | result = acpi_clear_gpe(handle, index); |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 681 | else if (!strcmp(buf, "mask\n")) |
| 682 | result = acpi_mask_gpe(handle, index, TRUE); |
| 683 | else if (!strcmp(buf, "unmask\n")) |
| 684 | result = acpi_mask_gpe(handle, index, FALSE); |
Lan Tianyu | c48b156 | 2013-09-12 03:32:05 -0400 | [diff] [blame] | 685 | else if (!kstrtoul(buf, 0, &tmp)) |
| 686 | all_counters[index].count = tmp; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 687 | else |
Lan Tianyu | c48b156 | 2013-09-12 03:32:05 -0400 | [diff] [blame] | 688 | result = -EINVAL; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 689 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { |
| 690 | int event = index - num_gpes; |
| 691 | if (!strcmp(buf, "disable\n") && |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 692 | (status & ACPI_EVENT_FLAG_ENABLE_SET)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 693 | result = acpi_disable_event(event, ACPI_NOT_ISR); |
| 694 | else if (!strcmp(buf, "enable\n") && |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 695 | !(status & ACPI_EVENT_FLAG_ENABLE_SET)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 696 | result = acpi_enable_event(event, ACPI_NOT_ISR); |
| 697 | else if (!strcmp(buf, "clear\n") && |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 698 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 699 | result = acpi_clear_event(event); |
Lan Tianyu | c48b156 | 2013-09-12 03:32:05 -0400 | [diff] [blame] | 700 | else if (!kstrtoul(buf, 0, &tmp)) |
| 701 | all_counters[index].count = tmp; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 702 | else |
Lan Tianyu | c48b156 | 2013-09-12 03:32:05 -0400 | [diff] [blame] | 703 | result = -EINVAL; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 704 | } else |
| 705 | all_counters[index].count = strtoul(buf, NULL, 0); |
| 706 | |
| 707 | if (ACPI_FAILURE(result)) |
| 708 | result = -EINVAL; |
| 709 | end: |
| 710 | return result ? result : size; |
| 711 | } |
| 712 | |
Lv Zheng | c1e9414 | 2017-04-04 19:32:17 +0000 | [diff] [blame] | 713 | /* |
| 714 | * A Quirk Mechanism for GPE Flooding Prevention: |
| 715 | * |
| 716 | * Quirks may be needed to prevent GPE flooding on a specific GPE. The |
| 717 | * flooding typically cannot be detected and automatically prevented by |
| 718 | * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in |
| 719 | * the AML tables. This normally indicates a feature gap in Linux, thus |
| 720 | * instead of providing endless quirk tables, we provide a boot parameter |
| 721 | * for those who want this quirk. For example, if the users want to prevent |
| 722 | * the GPE flooding for GPE 00, they need to specify the following boot |
| 723 | * parameter: |
| 724 | * acpi_mask_gpe=0x00 |
| 725 | * The masking status can be modified by the following runtime controlling |
| 726 | * interface: |
| 727 | * echo unmask > /sys/firmware/acpi/interrupts/gpe00 |
| 728 | */ |
Prarit Bhargava | ccebc75 | 2017-11-30 15:05:59 -0500 | [diff] [blame] | 729 | #define ACPI_MASKABLE_GPE_MAX 0xFF |
| 730 | static DECLARE_BITMAP(acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) __initdata; |
Lv Zheng | c1e9414 | 2017-04-04 19:32:17 +0000 | [diff] [blame] | 731 | |
| 732 | static int __init acpi_gpe_set_masked_gpes(char *val) |
| 733 | { |
| 734 | u8 gpe; |
| 735 | |
| 736 | if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX) |
| 737 | return -EINVAL; |
Prarit Bhargava | ccebc75 | 2017-11-30 15:05:59 -0500 | [diff] [blame] | 738 | set_bit(gpe, acpi_masked_gpes_map); |
Lv Zheng | c1e9414 | 2017-04-04 19:32:17 +0000 | [diff] [blame] | 739 | |
| 740 | return 1; |
| 741 | } |
| 742 | __setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes); |
| 743 | |
| 744 | void __init acpi_gpe_apply_masked_gpes(void) |
| 745 | { |
| 746 | acpi_handle handle; |
| 747 | acpi_status status; |
| 748 | u8 gpe; |
| 749 | |
Prarit Bhargava | ccebc75 | 2017-11-30 15:05:59 -0500 | [diff] [blame] | 750 | for_each_set_bit(gpe, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) { |
| 751 | status = acpi_get_gpe_device(gpe, &handle); |
| 752 | if (ACPI_SUCCESS(status)) { |
| 753 | pr_info("Masking GPE 0x%x.\n", gpe); |
| 754 | (void)acpi_mask_gpe(handle, gpe, TRUE); |
Lv Zheng | c1e9414 | 2017-04-04 19:32:17 +0000 | [diff] [blame] | 755 | } |
| 756 | } |
| 757 | } |
| 758 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 759 | void acpi_irq_stats_init(void) |
| 760 | { |
Lin Ming | a0fcdb2 | 2010-12-13 13:39:26 +0800 | [diff] [blame] | 761 | acpi_status status; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 762 | int i; |
| 763 | |
| 764 | if (all_counters) |
| 765 | return; |
| 766 | |
| 767 | num_gpes = acpi_current_gpe_count; |
| 768 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; |
| 769 | |
| 770 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), |
| 771 | GFP_KERNEL); |
| 772 | if (all_attrs == NULL) |
| 773 | return; |
| 774 | |
| 775 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
| 776 | GFP_KERNEL); |
| 777 | if (all_counters == NULL) |
| 778 | goto fail; |
| 779 | |
Lv Zheng | 644ef74 | 2012-10-31 02:25:36 +0000 | [diff] [blame] | 780 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); |
Lin Ming | a0fcdb2 | 2010-12-13 13:39:26 +0800 | [diff] [blame] | 781 | if (ACPI_FAILURE(status)) |
| 782 | goto fail; |
| 783 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 784 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), |
| 785 | GFP_KERNEL); |
| 786 | if (counter_attrs == NULL) |
| 787 | goto fail; |
| 788 | |
| 789 | for (i = 0; i < num_counters; ++i) { |
| 790 | char buffer[12]; |
| 791 | char *name; |
| 792 | |
| 793 | if (i < num_gpes) |
| 794 | sprintf(buffer, "gpe%02X", i); |
| 795 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) |
| 796 | sprintf(buffer, "ff_pmtimer"); |
| 797 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) |
| 798 | sprintf(buffer, "ff_gbl_lock"); |
| 799 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) |
| 800 | sprintf(buffer, "ff_pwr_btn"); |
| 801 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) |
| 802 | sprintf(buffer, "ff_slp_btn"); |
| 803 | else if (i == num_gpes + ACPI_EVENT_RTC) |
| 804 | sprintf(buffer, "ff_rt_clk"); |
| 805 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) |
| 806 | sprintf(buffer, "gpe_all"); |
| 807 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) |
| 808 | sprintf(buffer, "sci"); |
| 809 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) |
| 810 | sprintf(buffer, "sci_not"); |
| 811 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) |
| 812 | sprintf(buffer, "error"); |
| 813 | else |
| 814 | sprintf(buffer, "bug%02X", i); |
| 815 | |
Kees Cook | 096a8aa | 2013-07-03 15:04:55 -0700 | [diff] [blame] | 816 | name = kstrdup(buffer, GFP_KERNEL); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 817 | if (name == NULL) |
| 818 | goto fail; |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 819 | |
| 820 | sysfs_attr_init(&counter_attrs[i].attr); |
| 821 | counter_attrs[i].attr.name = name; |
| 822 | counter_attrs[i].attr.mode = 0644; |
| 823 | counter_attrs[i].show = counter_show; |
| 824 | counter_attrs[i].store = counter_set; |
| 825 | |
| 826 | all_attrs[i] = &counter_attrs[i].attr; |
| 827 | } |
| 828 | |
| 829 | interrupt_stats_attr_group.attrs = all_attrs; |
| 830 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
| 831 | return; |
| 832 | |
| 833 | fail: |
| 834 | delete_gpe_attr_array(); |
| 835 | return; |
| 836 | } |
| 837 | |
| 838 | static void __exit interrupt_stats_exit(void) |
| 839 | { |
| 840 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); |
| 841 | |
| 842 | delete_gpe_attr_array(); |
| 843 | |
| 844 | return; |
| 845 | } |
| 846 | |
Thomas Renninger | 362b646 | 2011-11-04 03:33:46 +0100 | [diff] [blame] | 847 | static ssize_t |
| 848 | acpi_show_profile(struct device *dev, struct device_attribute *attr, |
| 849 | char *buf) |
| 850 | { |
| 851 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); |
| 852 | } |
| 853 | |
| 854 | static const struct device_attribute pm_profile_attr = |
| 855 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); |
| 856 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 857 | static ssize_t hotplug_enabled_show(struct kobject *kobj, |
| 858 | struct kobj_attribute *attr, char *buf) |
| 859 | { |
| 860 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); |
| 861 | |
| 862 | return sprintf(buf, "%d\n", hotplug->enabled); |
| 863 | } |
| 864 | |
| 865 | static ssize_t hotplug_enabled_store(struct kobject *kobj, |
| 866 | struct kobj_attribute *attr, |
| 867 | const char *buf, size_t size) |
| 868 | { |
| 869 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); |
| 870 | unsigned int val; |
| 871 | |
| 872 | if (kstrtouint(buf, 10, &val) || val > 1) |
| 873 | return -EINVAL; |
| 874 | |
| 875 | acpi_scan_hotplug_enabled(hotplug, val); |
| 876 | return size; |
| 877 | } |
| 878 | |
| 879 | static struct kobj_attribute hotplug_enabled_attr = |
| 880 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, |
| 881 | hotplug_enabled_store); |
| 882 | |
| 883 | static struct attribute *hotplug_profile_attrs[] = { |
| 884 | &hotplug_enabled_attr.attr, |
| 885 | NULL |
| 886 | }; |
| 887 | |
Rafael J. Wysocki | b09753e | 2013-03-19 00:16:15 +0100 | [diff] [blame] | 888 | static struct kobj_type acpi_hotplug_profile_ktype = { |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 889 | .sysfs_ops = &kobj_sysfs_ops, |
| 890 | .default_attrs = hotplug_profile_attrs, |
| 891 | }; |
| 892 | |
| 893 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, |
| 894 | const char *name) |
| 895 | { |
| 896 | int error; |
| 897 | |
| 898 | if (!hotplug_kobj) |
| 899 | goto err_out; |
| 900 | |
Bjorn Helgaas | acd3e2c | 2013-09-25 14:23:20 -0600 | [diff] [blame] | 901 | error = kobject_init_and_add(&hotplug->kobj, |
| 902 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 903 | if (error) |
| 904 | goto err_out; |
| 905 | |
| 906 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); |
| 907 | return; |
| 908 | |
| 909 | err_out: |
| 910 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); |
| 911 | } |
| 912 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 913 | static ssize_t force_remove_show(struct kobject *kobj, |
| 914 | struct kobj_attribute *attr, char *buf) |
| 915 | { |
| 916 | return sprintf(buf, "%d\n", !!acpi_force_hot_remove); |
| 917 | } |
| 918 | |
| 919 | static ssize_t force_remove_store(struct kobject *kobj, |
| 920 | struct kobj_attribute *attr, |
| 921 | const char *buf, size_t size) |
| 922 | { |
| 923 | bool val; |
| 924 | int ret; |
| 925 | |
| 926 | ret = strtobool(buf, &val); |
| 927 | if (ret < 0) |
| 928 | return ret; |
| 929 | |
| 930 | lock_device_hotplug(); |
| 931 | acpi_force_hot_remove = val; |
| 932 | unlock_device_hotplug(); |
| 933 | return size; |
| 934 | } |
| 935 | |
| 936 | static const struct kobj_attribute force_remove_attr = |
| 937 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, |
| 938 | force_remove_store); |
| 939 | |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 940 | int __init acpi_sysfs_init(void) |
| 941 | { |
| 942 | int result; |
| 943 | |
| 944 | result = acpi_tables_sysfs_init(); |
Thomas Renninger | 362b646 | 2011-11-04 03:33:46 +0100 | [diff] [blame] | 945 | if (result) |
| 946 | return result; |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 947 | |
| 948 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); |
Insu Yun | bc1e49d | 2015-10-15 12:19:30 -0400 | [diff] [blame] | 949 | if (!hotplug_kobj) |
| 950 | return -ENOMEM; |
| 951 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 952 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); |
| 953 | if (result) |
| 954 | return result; |
| 955 | |
Thomas Renninger | 362b646 | 2011-11-04 03:33:46 +0100 | [diff] [blame] | 956 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); |
Zhang Rui | 1c8fce2 | 2010-07-15 10:46:30 +0800 | [diff] [blame] | 957 | return result; |
| 958 | } |