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 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 52 | /* Names for Notify() values, used for debug output */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 53 | #ifdef ACPI_DEBUG_OUTPUT |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 54 | static const char *acpi_notify_value_names[] = { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | "Bus Check", |
| 56 | "Device Check", |
| 57 | "Device Wake", |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 58 | "Eject Request", |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 59 | "Device Check Light", |
| 60 | "Frequency Mismatch", |
| 61 | "Bus Mode Mismatch", |
| 62 | "Power Fault" |
| 63 | }; |
| 64 | #endif |
| 65 | |
| 66 | /* Local prototypes */ |
| 67 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 68 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 69 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 70 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 71 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | static u32 acpi_ev_global_lock_handler(void *context); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /******************************************************************************* |
| 75 | * |
| 76 | * FUNCTION: acpi_ev_is_notify_object |
| 77 | * |
| 78 | * PARAMETERS: Node - Node to check |
| 79 | * |
| 80 | * RETURN: TRUE if notifies allowed on this object |
| 81 | * |
| 82 | * DESCRIPTION: Check type of node for a object that supports notifies. |
| 83 | * |
| 84 | * TBD: This could be replaced by a flag bit in the node. |
| 85 | * |
| 86 | ******************************************************************************/ |
| 87 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 88 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
| 90 | switch (node->type) { |
| 91 | case ACPI_TYPE_DEVICE: |
| 92 | case ACPI_TYPE_PROCESSOR: |
| 93 | case ACPI_TYPE_POWER: |
| 94 | case ACPI_TYPE_THERMAL: |
| 95 | /* |
| 96 | * These are the ONLY objects that can receive ACPI notifications |
| 97 | */ |
| 98 | return (TRUE); |
| 99 | |
| 100 | default: |
| 101 | return (FALSE); |
| 102 | } |
| 103 | } |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | /******************************************************************************* |
| 106 | * |
| 107 | * FUNCTION: acpi_ev_queue_notify_request |
| 108 | * |
| 109 | * PARAMETERS: Node - NS node for the notified object |
| 110 | * notify_value - Value from the Notify() request |
| 111 | * |
| 112 | * RETURN: Status |
| 113 | * |
| 114 | * DESCRIPTION: Dispatch a device notification event to a previously |
| 115 | * installed handler. |
| 116 | * |
| 117 | ******************************************************************************/ |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
| 121 | u32 notify_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | union acpi_operand_object *obj_desc; |
| 124 | union acpi_operand_object *handler_obj = NULL; |
| 125 | union acpi_generic_state *notify_info; |
| 126 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 128 | ACPI_FUNCTION_NAME(ev_queue_notify_request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * 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] | 132 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need |
| 133 | * to be run. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | * For value 0x80 (Status Change) on the power button or sleep button, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 135 | * initiate soft-off or sleep operation? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 138 | "Dispatching Notify(%X) on node %p\n", notify_value, |
| 139 | node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | if (notify_value <= 7) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 142 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notify value: %s\n", |
| 143 | acpi_notify_value_names[notify_value])); |
| 144 | } else { |
| 145 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 146 | "Notify value: 0x%2.2X **Device Specific**\n", |
| 147 | notify_value)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | /* Get the notify object attached to the NS Node */ |
| 151 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | /* We have the notify object, Get the right handler */ |
| 156 | |
| 157 | switch (node->type) { |
| 158 | case ACPI_TYPE_DEVICE: |
| 159 | case ACPI_TYPE_THERMAL: |
| 160 | case ACPI_TYPE_PROCESSOR: |
| 161 | case ACPI_TYPE_POWER: |
| 162 | |
| 163 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | handler_obj = |
| 165 | obj_desc->common_notify.system_notify; |
| 166 | } else { |
| 167 | handler_obj = |
| 168 | obj_desc->common_notify.device_notify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | break; |
| 171 | |
| 172 | default: |
| 173 | /* All other types are not supported */ |
| 174 | return (AE_TYPE); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* If there is any handler to run, schedule the dispatcher */ |
| 179 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | if ((acpi_gbl_system_notify.handler |
| 181 | && (notify_value <= ACPI_MAX_SYS_NOTIFY)) |
| 182 | || (acpi_gbl_device_notify.handler |
| 183 | && (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { |
| 184 | notify_info = acpi_ut_create_generic_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | if (!notify_info) { |
| 186 | return (AE_NO_MEMORY); |
| 187 | } |
| 188 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 189 | notify_info->common.descriptor_type = |
| 190 | ACPI_DESC_TYPE_STATE_NOTIFY; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 191 | notify_info->notify.node = node; |
| 192 | notify_info->notify.value = (u16) notify_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | notify_info->notify.handler_obj = handler_obj; |
| 194 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 195 | status = |
| 196 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, |
| 197 | notify_info); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | if (ACPI_FAILURE(status)) { |
| 199 | acpi_ut_delete_generic_state(notify_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | } |
| 202 | |
| 203 | if (!handler_obj) { |
| 204 | /* |
| 205 | * There is no per-device notify handler for this device. |
| 206 | * This may or may not be a problem. |
| 207 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 209 | "No notify handler for Notify(%4.4s, %X) node %p\n", |
| 210 | acpi_ut_get_node_name(node), notify_value, |
| 211 | node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | return (status); |
| 215 | } |
| 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /******************************************************************************* |
| 218 | * |
| 219 | * FUNCTION: acpi_ev_notify_dispatch |
| 220 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 221 | * PARAMETERS: Context - To be passed to the notify handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | * |
| 223 | * RETURN: None. |
| 224 | * |
| 225 | * DESCRIPTION: Dispatch a device notification event to a previously |
| 226 | * installed handler. |
| 227 | * |
| 228 | ******************************************************************************/ |
| 229 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 230 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 232 | union acpi_generic_state *notify_info = |
| 233 | (union acpi_generic_state *)context; |
| 234 | acpi_notify_handler global_handler = NULL; |
| 235 | void *global_context = NULL; |
| 236 | union acpi_operand_object *handler_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | ACPI_FUNCTION_ENTRY(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | /* |
| 241 | * We will invoke a global notify handler if installed. |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 242 | * This is done _before_ we invoke the per-device handler attached |
| 243 | * to the device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | */ |
| 245 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | /* Global system notification handler */ |
| 248 | |
| 249 | if (acpi_gbl_system_notify.handler) { |
| 250 | global_handler = acpi_gbl_system_notify.handler; |
| 251 | global_context = acpi_gbl_system_notify.context; |
| 252 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 253 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | /* Global driver notification handler */ |
| 255 | |
| 256 | if (acpi_gbl_device_notify.handler) { |
| 257 | global_handler = acpi_gbl_device_notify.handler; |
| 258 | global_context = acpi_gbl_device_notify.context; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | /* Invoke the system handler first, if present */ |
| 263 | |
| 264 | if (global_handler) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | global_handler(notify_info->notify.node, |
| 266 | notify_info->notify.value, global_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | /* Now invoke the per-device handler, if present */ |
| 270 | |
| 271 | handler_obj = notify_info->notify.handler_obj; |
| 272 | if (handler_obj) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 273 | handler_obj->notify.handler(notify_info->notify.node, |
| 274 | notify_info->notify.value, |
| 275 | handler_obj->notify.context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | /* All done with the info object */ |
| 279 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 280 | acpi_ut_delete_generic_state(notify_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | /******************************************************************************* |
| 284 | * |
| 285 | * FUNCTION: acpi_ev_global_lock_thread |
| 286 | * |
| 287 | * PARAMETERS: Context - From thread interface, not used |
| 288 | * |
| 289 | * RETURN: None |
| 290 | * |
| 291 | * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the |
| 292 | * Global Lock. Simply signal all threads that are waiting |
| 293 | * for the lock. |
| 294 | * |
| 295 | ******************************************************************************/ |
| 296 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 297 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | /* Signal threads that are waiting for the lock */ |
| 302 | |
| 303 | if (acpi_gbl_global_lock_thread_count) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | /* Send sufficient units to the semaphore */ |
| 306 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 307 | status = |
| 308 | acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, |
| 309 | acpi_gbl_global_lock_thread_count); |
| 310 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 311 | ACPI_ERROR((AE_INFO, |
| 312 | "Could not signal Global Lock semaphore")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | /******************************************************************************* |
| 318 | * |
| 319 | * FUNCTION: acpi_ev_global_lock_handler |
| 320 | * |
| 321 | * PARAMETERS: Context - From thread interface, not used |
| 322 | * |
| 323 | * RETURN: ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED |
| 324 | * |
| 325 | * DESCRIPTION: Invoked directly from the SCI handler when a global lock |
| 326 | * release interrupt occurs. Grab the global lock and queue |
| 327 | * the global lock thread for execution |
| 328 | * |
| 329 | ******************************************************************************/ |
| 330 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 331 | static u32 acpi_ev_global_lock_handler(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 333 | u8 acquired = FALSE; |
| 334 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | /* |
| 337 | * Attempt to get the lock |
| 338 | * If we don't get it now, it will be marked pending and we will |
| 339 | * take another interrupt when it becomes free. |
| 340 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 341 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | if (acquired) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | /* Got the lock, now wake all threads waiting for it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | acpi_gbl_global_lock_acquired = TRUE; |
Alexey Y. Starikovskiy | fcfc638 | 2006-09-26 04:18:16 -0400 | [diff] [blame^] | 346 | acpi_ev_global_lock_thread(context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | return (ACPI_INTERRUPT_HANDLED); |
| 350 | } |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /******************************************************************************* |
| 353 | * |
| 354 | * FUNCTION: acpi_ev_init_global_lock_handler |
| 355 | * |
| 356 | * PARAMETERS: None |
| 357 | * |
| 358 | * RETURN: Status |
| 359 | * |
| 360 | * DESCRIPTION: Install a handler for the global lock release event |
| 361 | * |
| 362 | ******************************************************************************/ |
| 363 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 364 | acpi_status acpi_ev_init_global_lock_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 366 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 368 | ACPI_FUNCTION_TRACE(ev_init_global_lock_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | acpi_gbl_global_lock_present = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 371 | status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, |
| 372 | acpi_ev_global_lock_handler, |
| 373 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | /* |
| 376 | * If the global lock does not exist on this platform, the attempt |
| 377 | * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) |
| 378 | * Map to AE_OK, but mark global lock as not present. |
| 379 | * Any attempt to actually use the global lock will be flagged |
| 380 | * with an error. |
| 381 | */ |
| 382 | if (status == AE_NO_HARDWARE_RESPONSE) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 383 | ACPI_ERROR((AE_INFO, |
| 384 | "No response from Global Lock hardware, disabling lock")); |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame] | 385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | acpi_gbl_global_lock_present = FALSE; |
| 387 | status = AE_OK; |
| 388 | } |
| 389 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 390 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | /****************************************************************************** |
| 394 | * |
| 395 | * FUNCTION: acpi_ev_acquire_global_lock |
| 396 | * |
| 397 | * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. |
| 398 | * |
| 399 | * RETURN: Status |
| 400 | * |
| 401 | * DESCRIPTION: Attempt to gain ownership of the Global Lock. |
| 402 | * |
| 403 | *****************************************************************************/ |
| 404 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 405 | acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | acpi_status status = AE_OK; |
| 408 | u8 acquired = FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 410 | ACPI_FUNCTION_TRACE(ev_acquire_global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | #ifndef ACPI_APPLICATION |
| 413 | /* Make sure that we actually have a global lock */ |
| 414 | |
| 415 | if (!acpi_gbl_global_lock_present) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | return_ACPI_STATUS(AE_NO_GLOBAL_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | #endif |
| 419 | |
| 420 | /* One more thread wants the global lock */ |
| 421 | |
| 422 | acpi_gbl_global_lock_thread_count++; |
| 423 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 424 | /* |
| 425 | * If we (OS side vs. BIOS side) have the hardware lock already, |
| 426 | * we are done |
| 427 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (acpi_gbl_global_lock_acquired) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 429 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | /* We must acquire the actual hardware lock */ |
| 433 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 434 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | if (acquired) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 436 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 437 | /* We got the lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 439 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 440 | "Acquired the HW Global Lock\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | acpi_gbl_global_lock_acquired = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 443 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Did not get the lock. The pending bit was set above, and we must now |
| 448 | * wait until we get the global lock released interrupt. |
| 449 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | 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] | 451 | |
| 452 | /* |
| 453 | * Acquire the global lock semaphore first. |
| 454 | * Since this wait will block, we must release the interpreter |
| 455 | */ |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 456 | status = |
| 457 | acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore, |
| 458 | timeout); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 459 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | /******************************************************************************* |
| 463 | * |
| 464 | * FUNCTION: acpi_ev_release_global_lock |
| 465 | * |
| 466 | * PARAMETERS: None |
| 467 | * |
| 468 | * RETURN: Status |
| 469 | * |
| 470 | * DESCRIPTION: Releases ownership of the Global Lock. |
| 471 | * |
| 472 | ******************************************************************************/ |
| 473 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 474 | acpi_status acpi_ev_release_global_lock(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 476 | u8 pending = FALSE; |
| 477 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 479 | ACPI_FUNCTION_TRACE(ev_release_global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | if (!acpi_gbl_global_lock_thread_count) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 482 | ACPI_WARNING((AE_INFO, |
| 483 | "Cannot release HW Global Lock, it has not been acquired")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 484 | return_ACPI_STATUS(AE_NOT_ACQUIRED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /* One fewer thread has the global lock */ |
| 488 | |
| 489 | acpi_gbl_global_lock_thread_count--; |
| 490 | if (acpi_gbl_global_lock_thread_count) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | /* There are still some threads holding the lock, cannot release */ |
| 493 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 494 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /* |
| 498 | * No more threads holding lock, we can do the actual hardware |
| 499 | * release |
| 500 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, pending); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | acpi_gbl_global_lock_acquired = FALSE; |
| 503 | |
| 504 | /* |
| 505 | * If the pending bit was set, we must write GBL_RLS to the control |
| 506 | * register |
| 507 | */ |
| 508 | if (pending) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 509 | status = acpi_set_register(ACPI_BITREG_GLOBAL_LOCK_RELEASE, |
| 510 | 1, ACPI_MTX_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 513 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | /****************************************************************************** |
| 517 | * |
| 518 | * FUNCTION: acpi_ev_terminate |
| 519 | * |
| 520 | * PARAMETERS: none |
| 521 | * |
| 522 | * RETURN: none |
| 523 | * |
| 524 | * DESCRIPTION: Disable events and free memory allocated for table storage. |
| 525 | * |
| 526 | ******************************************************************************/ |
| 527 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 528 | void acpi_ev_terminate(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 530 | acpi_native_uint i; |
| 531 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 533 | ACPI_FUNCTION_TRACE(ev_terminate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | if (acpi_gbl_events_initialized) { |
| 536 | /* |
| 537 | * Disable all event-related functionality. |
| 538 | * In all cases, on error, print a message but obviously we don't abort. |
| 539 | */ |
| 540 | |
| 541 | /* Disable all fixed events */ |
| 542 | |
| 543 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 544 | status = acpi_disable_event((u32) i, 0); |
| 545 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 546 | ACPI_ERROR((AE_INFO, |
| 547 | "Could not disable fixed event %d", |
| 548 | (u32) i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
| 550 | } |
| 551 | |
| 552 | /* Disable all GPEs in all GPE blocks */ |
| 553 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 554 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | /* Remove SCI handler */ |
| 557 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 558 | status = acpi_ev_remove_sci_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 560 | ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | } |
| 563 | |
| 564 | /* Deallocate all handler objects installed within GPE info structs */ |
| 565 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 566 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
| 568 | /* Return to original mode if necessary */ |
| 569 | |
| 570 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 571 | status = acpi_disable(); |
| 572 | if (ACPI_FAILURE(status)) { |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 573 | ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | } |
| 576 | return_VOID; |
| 577 | } |