Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evmisc - Miscellaneous event manager support functions |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/acevents.h> |
| 46 | #include <acpi/acnamesp.h> |
| 47 | #include <acpi/acinterp.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 50 | ACPI_MODULE_NAME("evmisc") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 52 | #ifdef ACPI_DEBUG_OUTPUT |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 53 | static const char *acpi_notify_value_names[] = { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 54 | "Bus Check", |
| 55 | "Device Check", |
| 56 | "Device Wake", |
| 57 | "Eject request", |
| 58 | "Device Check Light", |
| 59 | "Frequency Mismatch", |
| 60 | "Bus Mode Mismatch", |
| 61 | "Power Fault" |
| 62 | }; |
| 63 | #endif |
| 64 | |
| 65 | /* Local prototypes */ |
| 66 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 68 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 69 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 70 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 71 | static u32 acpi_ev_global_lock_handler(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | /******************************************************************************* |
| 74 | * |
| 75 | * FUNCTION: acpi_ev_is_notify_object |
| 76 | * |
| 77 | * PARAMETERS: Node - Node to check |
| 78 | * |
| 79 | * RETURN: TRUE if notifies allowed on this object |
| 80 | * |
| 81 | * DESCRIPTION: Check type of node for a object that supports notifies. |
| 82 | * |
| 83 | * TBD: This could be replaced by a flag bit in the node. |
| 84 | * |
| 85 | ******************************************************************************/ |
| 86 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
| 89 | switch (node->type) { |
| 90 | case ACPI_TYPE_DEVICE: |
| 91 | case ACPI_TYPE_PROCESSOR: |
| 92 | case ACPI_TYPE_POWER: |
| 93 | case ACPI_TYPE_THERMAL: |
| 94 | /* |
| 95 | * These are the ONLY objects that can receive ACPI notifications |
| 96 | */ |
| 97 | return (TRUE); |
| 98 | |
| 99 | default: |
| 100 | return (FALSE); |
| 101 | } |
| 102 | } |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | /******************************************************************************* |
| 105 | * |
| 106 | * FUNCTION: acpi_ev_queue_notify_request |
| 107 | * |
| 108 | * PARAMETERS: Node - NS node for the notified object |
| 109 | * notify_value - Value from the Notify() request |
| 110 | * |
| 111 | * RETURN: Status |
| 112 | * |
| 113 | * DESCRIPTION: Dispatch a device notification event to a previously |
| 114 | * installed handler. |
| 115 | * |
| 116 | ******************************************************************************/ |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
| 120 | u32 notify_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | union acpi_operand_object *obj_desc; |
| 123 | union acpi_operand_object *handler_obj = NULL; |
| 124 | union acpi_generic_state *notify_info; |
| 125 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 127 | ACPI_FUNCTION_NAME(ev_queue_notify_request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | /* |
| 130 | * For value 3 (Ejection Request), some device method may need to be run. |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 131 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need |
| 132 | * to be run. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | * For value 0x80 (Status Change) on the power button or sleep button, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 134 | * initiate soft-off or sleep operation? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 136 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 137 | "Dispatching Notify(%X) on node %p\n", notify_value, |
| 138 | node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
| 140 | if (notify_value <= 7) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notify value: %s\n", |
| 142 | acpi_notify_value_names[notify_value])); |
| 143 | } else { |
| 144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 145 | "Notify value: 0x%2.2X **Device Specific**\n", |
| 146 | notify_value)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | /* Get the notify object attached to the NS Node */ |
| 150 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 151 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | /* We have the notify object, Get the right handler */ |
| 155 | |
| 156 | switch (node->type) { |
| 157 | case ACPI_TYPE_DEVICE: |
| 158 | case ACPI_TYPE_THERMAL: |
| 159 | case ACPI_TYPE_PROCESSOR: |
| 160 | case ACPI_TYPE_POWER: |
| 161 | |
| 162 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 163 | handler_obj = |
| 164 | obj_desc->common_notify.system_notify; |
| 165 | } else { |
| 166 | handler_obj = |
| 167 | obj_desc->common_notify.device_notify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | break; |
| 170 | |
| 171 | default: |
| 172 | /* All other types are not supported */ |
| 173 | return (AE_TYPE); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /* If there is any handler to run, schedule the dispatcher */ |
| 178 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 179 | if ((acpi_gbl_system_notify.handler |
| 180 | && (notify_value <= ACPI_MAX_SYS_NOTIFY)) |
| 181 | || (acpi_gbl_device_notify.handler |
| 182 | && (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { |
| 183 | notify_info = acpi_ut_create_generic_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | if (!notify_info) { |
| 185 | return (AE_NO_MEMORY); |
| 186 | } |
| 187 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 188 | notify_info->common.descriptor_type = |
| 189 | ACPI_DESC_TYPE_STATE_NOTIFY; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 190 | notify_info->notify.node = node; |
| 191 | notify_info->notify.value = (u16) notify_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | notify_info->notify.handler_obj = handler_obj; |
| 193 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 194 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, |
| 195 | acpi_ev_notify_dispatch, |
| 196 | notify_info); |
| 197 | if (ACPI_FAILURE(status)) { |
| 198 | acpi_ut_delete_generic_state(notify_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | } |
| 201 | |
| 202 | if (!handler_obj) { |
| 203 | /* |
| 204 | * There is no per-device notify handler for this device. |
| 205 | * This may or may not be a problem. |
| 206 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 207 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 208 | "No notify handler for Notify(%4.4s, %X) node %p\n", |
| 209 | acpi_ut_get_node_name(node), notify_value, |
| 210 | node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | return (status); |
| 214 | } |
| 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | /******************************************************************************* |
| 217 | * |
| 218 | * FUNCTION: acpi_ev_notify_dispatch |
| 219 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 220 | * PARAMETERS: Context - To be passed to the notify handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | * |
| 222 | * RETURN: None. |
| 223 | * |
| 224 | * DESCRIPTION: Dispatch a device notification event to a previously |
| 225 | * installed handler. |
| 226 | * |
| 227 | ******************************************************************************/ |
| 228 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 229 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 231 | union acpi_generic_state *notify_info = |
| 232 | (union acpi_generic_state *)context; |
| 233 | acpi_notify_handler global_handler = NULL; |
| 234 | void *global_context = NULL; |
| 235 | union acpi_operand_object *handler_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | ACPI_FUNCTION_ENTRY(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | /* |
| 240 | * We will invoke a global notify handler if installed. |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 241 | * This is done _before_ we invoke the per-device handler attached |
| 242 | * to the device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | */ |
| 244 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | /* Global system notification handler */ |
| 247 | |
| 248 | if (acpi_gbl_system_notify.handler) { |
| 249 | global_handler = acpi_gbl_system_notify.handler; |
| 250 | global_context = acpi_gbl_system_notify.context; |
| 251 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 252 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* Global driver notification handler */ |
| 254 | |
| 255 | if (acpi_gbl_device_notify.handler) { |
| 256 | global_handler = acpi_gbl_device_notify.handler; |
| 257 | global_context = acpi_gbl_device_notify.context; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | /* Invoke the system handler first, if present */ |
| 262 | |
| 263 | if (global_handler) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | global_handler(notify_info->notify.node, |
| 265 | notify_info->notify.value, global_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | /* Now invoke the per-device handler, if present */ |
| 269 | |
| 270 | handler_obj = notify_info->notify.handler_obj; |
| 271 | if (handler_obj) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 272 | handler_obj->notify.handler(notify_info->notify.node, |
| 273 | notify_info->notify.value, |
| 274 | handler_obj->notify.context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | /* All done with the info object */ |
| 278 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 279 | acpi_ut_delete_generic_state(notify_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /******************************************************************************* |
| 283 | * |
| 284 | * FUNCTION: acpi_ev_global_lock_thread |
| 285 | * |
| 286 | * PARAMETERS: Context - From thread interface, not used |
| 287 | * |
| 288 | * RETURN: None |
| 289 | * |
| 290 | * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the |
| 291 | * Global Lock. Simply signal all threads that are waiting |
| 292 | * for the lock. |
| 293 | * |
| 294 | ******************************************************************************/ |
| 295 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 296 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 298 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | /* Signal threads that are waiting for the lock */ |
| 301 | |
| 302 | if (acpi_gbl_global_lock_thread_count) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | /* Send sufficient units to the semaphore */ |
| 305 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 306 | status = |
| 307 | acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, |
| 308 | acpi_gbl_global_lock_thread_count); |
| 309 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 310 | ACPI_ERROR((AE_INFO, |
| 311 | "Could not signal Global Lock semaphore")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } |
| 313 | } |
| 314 | } |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /******************************************************************************* |
| 317 | * |
| 318 | * FUNCTION: acpi_ev_global_lock_handler |
| 319 | * |
| 320 | * PARAMETERS: Context - From thread interface, not used |
| 321 | * |
| 322 | * RETURN: ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED |
| 323 | * |
| 324 | * DESCRIPTION: Invoked directly from the SCI handler when a global lock |
| 325 | * release interrupt occurs. Grab the global lock and queue |
| 326 | * the global lock thread for execution |
| 327 | * |
| 328 | ******************************************************************************/ |
| 329 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | static u32 acpi_ev_global_lock_handler(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 332 | u8 acquired = FALSE; |
| 333 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
| 335 | /* |
| 336 | * Attempt to get the lock |
| 337 | * If we don't get it now, it will be marked pending and we will |
| 338 | * take another interrupt when it becomes free. |
| 339 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | if (acquired) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | /* Got the lock, now wake all threads waiting for it */ |
| 344 | |
| 345 | acpi_gbl_global_lock_acquired = TRUE; |
| 346 | |
| 347 | /* Run the Global Lock thread which will signal all waiting threads */ |
| 348 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 349 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, |
| 350 | acpi_ev_global_lock_thread, |
| 351 | context); |
| 352 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 353 | ACPI_EXCEPTION((AE_INFO, status, |
| 354 | "Could not queue Global Lock thread")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | return (ACPI_INTERRUPT_NOT_HANDLED); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | return (ACPI_INTERRUPT_HANDLED); |
| 361 | } |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | /******************************************************************************* |
| 364 | * |
| 365 | * FUNCTION: acpi_ev_init_global_lock_handler |
| 366 | * |
| 367 | * PARAMETERS: None |
| 368 | * |
| 369 | * RETURN: Status |
| 370 | * |
| 371 | * DESCRIPTION: Install a handler for the global lock release event |
| 372 | * |
| 373 | ******************************************************************************/ |
| 374 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | acpi_status acpi_ev_init_global_lock_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 377 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 379 | ACPI_FUNCTION_TRACE(ev_init_global_lock_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | acpi_gbl_global_lock_present = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 382 | status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, |
| 383 | acpi_ev_global_lock_handler, |
| 384 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
| 386 | /* |
| 387 | * If the global lock does not exist on this platform, the attempt |
| 388 | * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) |
| 389 | * Map to AE_OK, but mark global lock as not present. |
| 390 | * Any attempt to actually use the global lock will be flagged |
| 391 | * with an error. |
| 392 | */ |
| 393 | if (status == AE_NO_HARDWARE_RESPONSE) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 394 | ACPI_ERROR((AE_INFO, |
| 395 | "No response from Global Lock hardware, disabling lock")); |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame] | 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | acpi_gbl_global_lock_present = FALSE; |
| 398 | status = AE_OK; |
| 399 | } |
| 400 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 401 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /****************************************************************************** |
| 405 | * |
| 406 | * FUNCTION: acpi_ev_acquire_global_lock |
| 407 | * |
| 408 | * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. |
| 409 | * |
| 410 | * RETURN: Status |
| 411 | * |
| 412 | * DESCRIPTION: Attempt to gain ownership of the Global Lock. |
| 413 | * |
| 414 | *****************************************************************************/ |
| 415 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 418 | acpi_status status = AE_OK; |
| 419 | u8 acquired = FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 421 | ACPI_FUNCTION_TRACE(ev_acquire_global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | #ifndef ACPI_APPLICATION |
| 424 | /* Make sure that we actually have a global lock */ |
| 425 | |
| 426 | if (!acpi_gbl_global_lock_present) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 427 | return_ACPI_STATUS(AE_NO_GLOBAL_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | } |
| 429 | #endif |
| 430 | |
| 431 | /* One more thread wants the global lock */ |
| 432 | |
| 433 | acpi_gbl_global_lock_thread_count++; |
| 434 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 435 | /* |
| 436 | * If we (OS side vs. BIOS side) have the hardware lock already, |
| 437 | * we are done |
| 438 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | if (acpi_gbl_global_lock_acquired) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 440 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /* We must acquire the actual hardware lock */ |
| 444 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 445 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | if (acquired) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 447 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 448 | /* We got the lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 451 | "Acquired the HW Global Lock\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | acpi_gbl_global_lock_acquired = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 454 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Did not get the lock. The pending bit was set above, and we must now |
| 459 | * wait until we get the global lock released interrupt. |
| 460 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 461 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | /* |
| 464 | * Acquire the global lock semaphore first. |
| 465 | * Since this wait will block, we must release the interpreter |
| 466 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 467 | status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore, |
| 468 | timeout); |
| 469 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | /******************************************************************************* |
| 473 | * |
| 474 | * FUNCTION: acpi_ev_release_global_lock |
| 475 | * |
| 476 | * PARAMETERS: None |
| 477 | * |
| 478 | * RETURN: Status |
| 479 | * |
| 480 | * DESCRIPTION: Releases ownership of the Global Lock. |
| 481 | * |
| 482 | ******************************************************************************/ |
| 483 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 484 | acpi_status acpi_ev_release_global_lock(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 486 | u8 pending = FALSE; |
| 487 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 489 | ACPI_FUNCTION_TRACE(ev_release_global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | if (!acpi_gbl_global_lock_thread_count) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 492 | ACPI_WARNING((AE_INFO, |
| 493 | "Cannot release HW Global Lock, it has not been acquired")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 494 | return_ACPI_STATUS(AE_NOT_ACQUIRED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /* One fewer thread has the global lock */ |
| 498 | |
| 499 | acpi_gbl_global_lock_thread_count--; |
| 500 | if (acpi_gbl_global_lock_thread_count) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | /* There are still some threads holding the lock, cannot release */ |
| 503 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 504 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | /* |
| 508 | * No more threads holding lock, we can do the actual hardware |
| 509 | * release |
| 510 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 511 | ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, pending); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | acpi_gbl_global_lock_acquired = FALSE; |
| 513 | |
| 514 | /* |
| 515 | * If the pending bit was set, we must write GBL_RLS to the control |
| 516 | * register |
| 517 | */ |
| 518 | if (pending) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 519 | status = acpi_set_register(ACPI_BITREG_GLOBAL_LOCK_RELEASE, |
| 520 | 1, ACPI_MTX_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 523 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | /****************************************************************************** |
| 527 | * |
| 528 | * FUNCTION: acpi_ev_terminate |
| 529 | * |
| 530 | * PARAMETERS: none |
| 531 | * |
| 532 | * RETURN: none |
| 533 | * |
| 534 | * DESCRIPTION: Disable events and free memory allocated for table storage. |
| 535 | * |
| 536 | ******************************************************************************/ |
| 537 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 538 | void acpi_ev_terminate(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 540 | acpi_native_uint i; |
| 541 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 543 | ACPI_FUNCTION_TRACE(ev_terminate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | if (acpi_gbl_events_initialized) { |
| 546 | /* |
| 547 | * Disable all event-related functionality. |
| 548 | * In all cases, on error, print a message but obviously we don't abort. |
| 549 | */ |
| 550 | |
| 551 | /* Disable all fixed events */ |
| 552 | |
| 553 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 554 | status = acpi_disable_event((u32) i, 0); |
| 555 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 556 | ACPI_ERROR((AE_INFO, |
| 557 | "Could not disable fixed event %d", |
| 558 | (u32) i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
| 560 | } |
| 561 | |
| 562 | /* Disable all GPEs in all GPE blocks */ |
| 563 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 564 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | /* Remove SCI handler */ |
| 567 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 568 | status = acpi_ev_remove_sci_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 570 | ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | } |
| 573 | |
| 574 | /* Deallocate all handler objects installed within GPE info structs */ |
| 575 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 576 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
| 578 | /* Return to original mode if necessary */ |
| 579 | |
| 580 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 581 | status = acpi_disable(); |
| 582 | if (ACPI_FAILURE(status)) { |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 583 | ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
| 585 | } |
| 586 | return_VOID; |
| 587 | } |