Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 3 | * Module Name: evregion - Operation Region support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 25f044e | 2013-01-25 05:38:56 +0000 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "acevents.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "acinterp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("evregion") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 53 | extern u8 acpi_gbl_default_address_spaces[]; |
| 54 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | /* Local prototypes */ |
Lin Ming | 74d3ec77 | 2009-10-13 10:29:30 +0800 | [diff] [blame] | 56 | |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 57 | static void |
| 58 | acpi_ev_orphan_ec_reg_method(struct acpi_namespace_node *ec_device_node); |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 59 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 60 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 61 | acpi_ev_reg_run(acpi_handle obj_handle, |
| 62 | u32 level, void *context, void **return_value); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 63 | |
Lin Ming | 74d3ec77 | 2009-10-13 10:29:30 +0800 | [diff] [blame] | 64 | /******************************************************************************* |
| 65 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | * FUNCTION: acpi_ev_initialize_op_regions |
| 67 | * |
| 68 | * PARAMETERS: None |
| 69 | * |
| 70 | * RETURN: Status |
| 71 | * |
| 72 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have |
| 73 | * an installed default region handler. |
| 74 | * |
| 75 | ******************************************************************************/ |
| 76 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | acpi_status acpi_ev_initialize_op_regions(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | acpi_status status; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 80 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 82 | ACPI_FUNCTION_TRACE(ev_initialize_op_regions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 85 | if (ACPI_FAILURE(status)) { |
| 86 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | } |
| 88 | |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 89 | /* Run the _REG methods for op_regions in each default address space */ |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 90 | |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 91 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { |
| 92 | /* |
Lin Ming | 74d3ec77 | 2009-10-13 10:29:30 +0800 | [diff] [blame] | 93 | * Make sure the installed handler is the DEFAULT handler. If not the |
| 94 | * default, the _REG methods will have already been run (when the |
| 95 | * handler was installed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | */ |
Lin Ming | 74d3ec77 | 2009-10-13 10:29:30 +0800 | [diff] [blame] | 97 | if (acpi_ev_has_default_handler(acpi_gbl_root_node, |
| 98 | acpi_gbl_default_address_spaces |
| 99 | [i])) { |
| 100 | status = |
| 101 | acpi_ev_execute_reg_methods(acpi_gbl_root_node, |
| 102 | acpi_gbl_default_address_spaces |
| 103 | [i]); |
| 104 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Bob Moore | ef09c4f | 2011-02-14 16:13:25 +0800 | [diff] [blame] | 107 | acpi_gbl_reg_methods_executed = TRUE; |
| 108 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 109 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 110 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /******************************************************************************* |
| 114 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | * FUNCTION: acpi_ev_address_space_dispatch |
| 116 | * |
| 117 | * PARAMETERS: region_obj - Internal region object |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 118 | * field_obj - Corresponding field. Can be NULL. |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 119 | * function - Read or Write operation |
Bob Moore | f5407af | 2009-05-21 10:56:52 +0800 | [diff] [blame] | 120 | * region_offset - Where in the region to read or write |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | * bit_width - Field width in bits (8, 16, 32, or 64) |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 122 | * value - Pointer to in or out value, must be |
Bob Moore | 5df7e6c | 2010-01-21 10:06:32 +0800 | [diff] [blame] | 123 | * a full 64-bit integer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | * |
| 125 | * RETURN: Status |
| 126 | * |
| 127 | * DESCRIPTION: Dispatch an address space or operation region access to |
| 128 | * a previously installed handler. |
| 129 | * |
| 130 | ******************************************************************************/ |
| 131 | |
| 132 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 133 | acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 134 | union acpi_operand_object *field_obj, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 135 | u32 function, |
Bob Moore | 5df7e6c | 2010-01-21 10:06:32 +0800 | [diff] [blame] | 136 | u32 region_offset, u32 bit_width, u64 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 138 | acpi_status status; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | acpi_adr_space_handler handler; |
| 140 | acpi_adr_space_setup region_setup; |
| 141 | union acpi_operand_object *handler_desc; |
| 142 | union acpi_operand_object *region_obj2; |
| 143 | void *region_context = NULL; |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 144 | struct acpi_connection_info *context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 146 | ACPI_FUNCTION_TRACE(ev_address_space_dispatch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | if (!region_obj2) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | return_ACPI_STATUS(AE_NOT_EXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /* Ensure that there is a handler associated with this region */ |
| 154 | |
| 155 | handler_desc = region_obj->region.handler; |
| 156 | if (!handler_desc) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 157 | ACPI_ERROR((AE_INFO, |
| 158 | "No handler for Region [%4.4s] (%p) [%s]", |
| 159 | acpi_ut_get_node_name(region_obj->region.node), |
| 160 | region_obj, |
| 161 | acpi_ut_get_region_name(region_obj->region. |
| 162 | space_id))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | return_ACPI_STATUS(AE_NOT_EXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 167 | context = handler_desc->address_space.context; |
| 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | /* |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 170 | * It may be the case that the region has never been initialized. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * Some types of regions require special init code |
| 172 | */ |
| 173 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 174 | |
| 175 | /* This region has not been initialized yet, do it */ |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | region_setup = handler_desc->address_space.setup; |
| 178 | if (!region_setup) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | /* No initialization routine, exit with error */ |
| 181 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 182 | ACPI_ERROR((AE_INFO, |
| 183 | "No init routine for region(%p) [%s]", |
| 184 | region_obj, |
| 185 | acpi_ut_get_region_name(region_obj->region. |
| 186 | space_id))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | return_ACPI_STATUS(AE_NOT_EXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | /* |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 191 | * We must exit the interpreter because the region setup will |
| 192 | * potentially execute control methods (for example, the _REG method |
| 193 | * for this region) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | */ |
Bob Moore | 014d433 | 2008-01-10 23:04:10 -0500 | [diff] [blame] | 195 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | status = region_setup(region_obj, ACPI_REGION_ACTIVATE, |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 198 | context, ®ion_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | /* Re-enter the interpreter */ |
| 201 | |
Bob Moore | 014d433 | 2008-01-10 23:04:10 -0500 | [diff] [blame] | 202 | acpi_ex_enter_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | /* Check for failure of the Region Setup */ |
| 205 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 206 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 207 | ACPI_EXCEPTION((AE_INFO, status, |
| 208 | "During region initialization: [%s]", |
| 209 | acpi_ut_get_region_name(region_obj-> |
| 210 | region. |
| 211 | space_id))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 215 | /* Region initialization may have been completed by region_setup */ |
| 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { |
| 218 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; |
| 219 | |
| 220 | if (region_obj2->extra.region_context) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /* The handler for this region was already installed */ |
| 223 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 224 | ACPI_FREE(region_context); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 225 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | /* |
| 227 | * Save the returned context for use in all accesses to |
| 228 | * this particular region |
| 229 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 230 | region_obj2->extra.region_context = |
| 231 | region_context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /* We have everything we need, we can invoke the address space handler */ |
| 237 | |
| 238 | handler = handler_desc->address_space.handler; |
| 239 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 240 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 241 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", |
| 242 | ®ion_obj->region.handler->address_space, handler, |
Bob Moore | f5407af | 2009-05-21 10:56:52 +0800 | [diff] [blame] | 243 | ACPI_FORMAT_NATIVE_UINT(region_obj->region.address + |
| 244 | region_offset), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 245 | acpi_ut_get_region_name(region_obj->region. |
| 246 | space_id))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 248 | /* |
| 249 | * Special handling for generic_serial_bus and general_purpose_io: |
| 250 | * There are three extra parameters that must be passed to the |
| 251 | * handler via the context: |
| 252 | * 1) Connection buffer, a resource template from Connection() op. |
| 253 | * 2) Length of the above buffer. |
| 254 | * 3) Actual access length from the access_as() op. |
| 255 | */ |
| 256 | if (((region_obj->region.space_id == ACPI_ADR_SPACE_GSBUS) || |
| 257 | (region_obj->region.space_id == ACPI_ADR_SPACE_GPIO)) && |
| 258 | context && field_obj) { |
| 259 | |
| 260 | /* Get the Connection (resource_template) buffer */ |
| 261 | |
| 262 | context->connection = field_obj->field.resource_buffer; |
| 263 | context->length = field_obj->field.resource_length; |
| 264 | context->access_length = field_obj->field.access_length; |
| 265 | } |
| 266 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 267 | if (!(handler_desc->address_space.handler_flags & |
| 268 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | /* |
| 270 | * For handlers other than the default (supplied) handlers, we must |
| 271 | * exit the interpreter because the handler *might* block -- we don't |
| 272 | * know what it will do, so we can't hold the lock on the intepreter. |
| 273 | */ |
Bob Moore | 014d433 | 2008-01-10 23:04:10 -0500 | [diff] [blame] | 274 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | /* Call the handler */ |
| 278 | |
Bob Moore | f5407af | 2009-05-21 10:56:52 +0800 | [diff] [blame] | 279 | status = handler(function, |
| 280 | (region_obj->region.address + region_offset), |
Bob Moore | 9ce8178 | 2011-11-16 13:39:07 +0800 | [diff] [blame] | 281 | bit_width, value, context, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | region_obj2->extra.region_context); |
| 283 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 284 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 285 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", |
| 286 | acpi_ut_get_region_name(region_obj->region. |
| 287 | space_id))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 290 | if (!(handler_desc->address_space.handler_flags & |
| 291 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | /* |
| 293 | * We just returned from a non-default handler, we must re-enter the |
| 294 | * interpreter |
| 295 | */ |
Bob Moore | 014d433 | 2008-01-10 23:04:10 -0500 | [diff] [blame] | 296 | acpi_ex_enter_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | /******************************************************************************* |
| 303 | * |
| 304 | * FUNCTION: acpi_ev_detach_region |
| 305 | * |
| 306 | * PARAMETERS: region_obj - Region Object |
| 307 | * acpi_ns_is_locked - Namespace Region Already Locked? |
| 308 | * |
| 309 | * RETURN: None |
| 310 | * |
| 311 | * DESCRIPTION: Break the association between the handler and the region |
| 312 | * this is a two way association. |
| 313 | * |
| 314 | ******************************************************************************/ |
| 315 | |
| 316 | void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 317 | acpi_ev_detach_region(union acpi_operand_object *region_obj, |
| 318 | u8 acpi_ns_is_locked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 320 | union acpi_operand_object *handler_obj; |
| 321 | union acpi_operand_object *obj_desc; |
| 322 | union acpi_operand_object **last_obj_ptr; |
| 323 | acpi_adr_space_setup region_setup; |
| 324 | void **region_context; |
| 325 | union acpi_operand_object *region_obj2; |
| 326 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 328 | ACPI_FUNCTION_TRACE(ev_detach_region); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (!region_obj2) { |
| 332 | return_VOID; |
| 333 | } |
| 334 | region_context = ®ion_obj2->extra.region_context; |
| 335 | |
| 336 | /* Get the address handler from the region object */ |
| 337 | |
| 338 | handler_obj = region_obj->region.handler; |
| 339 | if (!handler_obj) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /* This region has no handler, all done */ |
| 342 | |
| 343 | return_VOID; |
| 344 | } |
| 345 | |
| 346 | /* Find this region in the handler's list */ |
| 347 | |
| 348 | obj_desc = handler_obj->address_space.region_list; |
| 349 | last_obj_ptr = &handler_obj->address_space.region_list; |
| 350 | |
| 351 | while (obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* Is this the correct Region? */ |
| 354 | |
| 355 | if (obj_desc == region_obj) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 356 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 357 | "Removing Region %p from address handler %p\n", |
| 358 | region_obj, handler_obj)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | /* This is it, remove it from the handler's list */ |
| 361 | |
| 362 | *last_obj_ptr = obj_desc->region.next; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 363 | obj_desc->region.next = NULL; /* Must clear field */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
| 365 | if (acpi_ns_is_locked) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 366 | status = |
| 367 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 368 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | return_VOID; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | /* Now stop region accesses by executing the _REG method */ |
| 374 | |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 375 | status = |
| 376 | acpi_ev_execute_reg_method(region_obj, |
| 377 | ACPI_REG_DISCONNECT); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 378 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 379 | ACPI_EXCEPTION((AE_INFO, status, |
| 380 | "from region _REG, [%s]", |
| 381 | acpi_ut_get_region_name |
| 382 | (region_obj->region.space_id))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | if (acpi_ns_is_locked) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 386 | status = |
| 387 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 388 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | return_VOID; |
| 390 | } |
| 391 | } |
| 392 | |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 393 | /* |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 394 | * If the region has been activated, call the setup handler with |
| 395 | * the deactivate notification |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 396 | */ |
| 397 | if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { |
| 398 | region_setup = handler_obj->address_space.setup; |
| 399 | status = |
| 400 | region_setup(region_obj, |
| 401 | ACPI_REGION_DEACTIVATE, |
| 402 | handler_obj->address_space. |
| 403 | context, region_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 405 | /* Init routine may fail, Just ignore errors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 407 | if (ACPI_FAILURE(status)) { |
| 408 | ACPI_EXCEPTION((AE_INFO, status, |
| 409 | "from region handler - deactivate, [%s]", |
| 410 | acpi_ut_get_region_name |
| 411 | (region_obj->region. |
| 412 | space_id))); |
| 413 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 415 | region_obj->region.flags &= |
| 416 | ~(AOPOBJ_SETUP_COMPLETE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /* |
| 420 | * Remove handler reference in the region |
| 421 | * |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 422 | * NOTE: this doesn't mean that the region goes away, the region |
| 423 | * is just inaccessible as indicated to the _REG method |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | * |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 425 | * If the region is on the handler's list, this must be the |
| 426 | * region's handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | */ |
| 428 | region_obj->region.handler = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 429 | acpi_ut_remove_reference(handler_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | return_VOID; |
| 432 | } |
| 433 | |
| 434 | /* Walk the linked list of handlers */ |
| 435 | |
| 436 | last_obj_ptr = &obj_desc->region.next; |
| 437 | obj_desc = obj_desc->region.next; |
| 438 | } |
| 439 | |
| 440 | /* If we get here, the region was not in the handler's region list */ |
| 441 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 442 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 443 | "Cannot remove region %p from address handler %p\n", |
| 444 | region_obj, handler_obj)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | return_VOID; |
| 447 | } |
| 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | /******************************************************************************* |
| 450 | * |
| 451 | * FUNCTION: acpi_ev_attach_region |
| 452 | * |
| 453 | * PARAMETERS: handler_obj - Handler Object |
| 454 | * region_obj - Region Object |
| 455 | * acpi_ns_is_locked - Namespace Region Already Locked? |
| 456 | * |
| 457 | * RETURN: None |
| 458 | * |
| 459 | * DESCRIPTION: Create the association between the handler and the region |
| 460 | * this is a two way association. |
| 461 | * |
| 462 | ******************************************************************************/ |
| 463 | |
| 464 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 465 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, |
| 466 | union acpi_operand_object *region_obj, |
| 467 | u8 acpi_ns_is_locked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | { |
| 469 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 470 | ACPI_FUNCTION_TRACE(ev_attach_region); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 472 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 473 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", |
| 474 | acpi_ut_get_node_name(region_obj->region.node), |
| 475 | region_obj, handler_obj, |
| 476 | acpi_ut_get_region_name(region_obj->region. |
| 477 | space_id))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | /* Link this region to the front of the handler's list */ |
| 480 | |
| 481 | region_obj->region.next = handler_obj->address_space.region_list; |
| 482 | handler_obj->address_space.region_list = region_obj; |
| 483 | |
| 484 | /* Install the region's handler */ |
| 485 | |
| 486 | if (region_obj->region.handler) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 487 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | region_obj->region.handler = handler_obj; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 491 | acpi_ut_add_reference(handler_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 493 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | /******************************************************************************* |
| 497 | * |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 498 | * FUNCTION: acpi_ev_execute_reg_method |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | * |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 500 | * PARAMETERS: region_obj - Region object |
| 501 | * function - Passed to _REG: On (1) or Off (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | * |
| 503 | * RETURN: Status |
| 504 | * |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 505 | * DESCRIPTION: Execute _REG method for a region |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | * |
| 507 | ******************************************************************************/ |
| 508 | |
| 509 | acpi_status |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 510 | acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | { |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 512 | struct acpi_evaluate_info *info; |
| 513 | union acpi_operand_object *args[3]; |
| 514 | union acpi_operand_object *region_obj2; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 515 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 517 | ACPI_FUNCTION_TRACE(ev_execute_reg_method); |
| 518 | |
| 519 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
| 520 | if (!region_obj2) { |
| 521 | return_ACPI_STATUS(AE_NOT_EXIST); |
| 522 | } |
| 523 | |
| 524 | if (region_obj2->extra.method_REG == NULL) { |
| 525 | return_ACPI_STATUS(AE_OK); |
| 526 | } |
| 527 | |
| 528 | /* Allocate and initialize the evaluation information block */ |
| 529 | |
| 530 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
| 531 | if (!info) { |
| 532 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 533 | } |
| 534 | |
| 535 | info->prefix_node = region_obj2->extra.method_REG; |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 536 | info->relative_pathname = NULL; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 537 | info->parameters = args; |
| 538 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | /* |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 541 | * The _REG method has two arguments: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 543 | * arg0 - Integer: |
| 544 | * Operation region space ID Same value as region_obj->Region.space_id |
| 545 | * |
| 546 | * arg1 - Integer: |
| 547 | * connection status 1 for connecting the handler, 0 for disconnecting |
| 548 | * the handler (Passed as a parameter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | */ |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 550 | args[0] = |
| 551 | acpi_ut_create_integer_object((u64)region_obj->region.space_id); |
| 552 | if (!args[0]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | status = AE_NO_MEMORY; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 554 | goto cleanup1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 557 | args[1] = acpi_ut_create_integer_object((u64)function); |
| 558 | if (!args[1]) { |
| 559 | status = AE_NO_MEMORY; |
| 560 | goto cleanup2; |
| 561 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 563 | args[2] = NULL; /* Terminate list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 565 | /* Execute the method, no return value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 567 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
| 568 | (ACPI_TYPE_METHOD, info->prefix_node, NULL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 570 | status = acpi_ns_evaluate(info); |
| 571 | acpi_ut_remove_reference(args[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 573 | cleanup2: |
| 574 | acpi_ut_remove_reference(args[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 576 | cleanup1: |
| 577 | ACPI_FREE(info); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 578 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
| 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | /******************************************************************************* |
| 582 | * |
| 583 | * FUNCTION: acpi_ev_execute_reg_methods |
| 584 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 585 | * PARAMETERS: node - Namespace node for the device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | * space_id - The address space ID |
| 587 | * |
| 588 | * RETURN: Status |
| 589 | * |
| 590 | * DESCRIPTION: Run all _REG methods for the input Space ID; |
| 591 | * Note: assumes namespace is locked, or system init time. |
| 592 | * |
| 593 | ******************************************************************************/ |
| 594 | |
| 595 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 596 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, |
| 597 | acpi_adr_space_type space_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 599 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 601 | ACPI_FUNCTION_TRACE(ev_execute_reg_methods); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
| 603 | /* |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 604 | * Run all _REG methods for all Operation Regions for this space ID. This |
| 605 | * is a separate walk in order to handle any interdependencies between |
| 606 | * regions and _REG methods. (i.e. handlers must be installed for all |
| 607 | * regions of this Space ID before we can run any _REG methods) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 609 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
| 610 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 611 | NULL, &space_id, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 613 | /* Special case for EC: handle "orphan" _REG methods with no region */ |
| 614 | |
| 615 | if (space_id == ACPI_ADR_SPACE_EC) { |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 616 | acpi_ev_orphan_ec_reg_method(node); |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 617 | } |
| 618 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | /******************************************************************************* |
| 623 | * |
| 624 | * FUNCTION: acpi_ev_reg_run |
| 625 | * |
| 626 | * PARAMETERS: walk_namespace callback |
| 627 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 628 | * DESCRIPTION: Run _REG method for region objects of the requested spaceID |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | * |
| 630 | ******************************************************************************/ |
| 631 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 632 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 633 | acpi_ev_reg_run(acpi_handle obj_handle, |
| 634 | u32 level, void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 636 | union acpi_operand_object *obj_desc; |
| 637 | struct acpi_namespace_node *node; |
| 638 | acpi_adr_space_type space_id; |
| 639 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 641 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | /* Convert and validate the device handle */ |
| 644 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 645 | node = acpi_ns_validate_handle(obj_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (!node) { |
| 647 | return (AE_BAD_PARAMETER); |
| 648 | } |
| 649 | |
| 650 | /* |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 651 | * We only care about regions.and objects that are allowed to have address |
| 652 | * space handlers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 654 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | return (AE_OK); |
| 656 | } |
| 657 | |
| 658 | /* Check for an existing internal object */ |
| 659 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 660 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | if (!obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | /* No object, just exit */ |
| 664 | |
| 665 | return (AE_OK); |
| 666 | } |
| 667 | |
| 668 | /* Object is a Region */ |
| 669 | |
| 670 | if (obj_desc->region.space_id != space_id) { |
Bob Moore | 9f15fc6 | 2008-11-12 16:01:56 +0800 | [diff] [blame] | 671 | |
| 672 | /* This region is for a different address space, just ignore it */ |
| 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | return (AE_OK); |
| 675 | } |
| 676 | |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 677 | status = acpi_ev_execute_reg_method(obj_desc, ACPI_REG_CONNECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | return (status); |
| 679 | } |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 680 | |
| 681 | /******************************************************************************* |
| 682 | * |
| 683 | * FUNCTION: acpi_ev_orphan_ec_reg_method |
| 684 | * |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 685 | * PARAMETERS: ec_device_node - Namespace node for an EC device |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 686 | * |
| 687 | * RETURN: None |
| 688 | * |
| 689 | * DESCRIPTION: Execute an "orphan" _REG method that appears under the EC |
| 690 | * device. This is a _REG method that has no corresponding region |
| 691 | * within the EC device scope. The orphan _REG method appears to |
| 692 | * have been enabled by the description of the ECDT in the ACPI |
| 693 | * specification: "The availability of the region space can be |
| 694 | * detected by providing a _REG method object underneath the |
| 695 | * Embedded Controller device." |
| 696 | * |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 697 | * To quickly access the EC device, we use the ec_device_node used |
| 698 | * during EC handler installation. Otherwise, we would need to |
| 699 | * perform a time consuming namespace walk, executing _HID |
| 700 | * methods to find the EC device. |
| 701 | * |
| 702 | * MUTEX: Assumes the namespace is locked |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 703 | * |
| 704 | ******************************************************************************/ |
| 705 | |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 706 | static void |
| 707 | acpi_ev_orphan_ec_reg_method(struct acpi_namespace_node *ec_device_node) |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 708 | { |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 709 | acpi_handle reg_method; |
| 710 | struct acpi_namespace_node *next_node; |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 711 | acpi_status status; |
| 712 | struct acpi_object_list args; |
| 713 | union acpi_object objects[2]; |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 714 | |
| 715 | ACPI_FUNCTION_TRACE(ev_orphan_ec_reg_method); |
| 716 | |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 717 | if (!ec_device_node) { |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 718 | return_VOID; |
| 719 | } |
| 720 | |
| 721 | /* Namespace is currently locked, must release */ |
| 722 | |
| 723 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 724 | |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 725 | /* Get a handle to a _REG method immediately under the EC device */ |
| 726 | |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 727 | status = acpi_get_handle(ec_device_node, METHOD_NAME__REG, ®_method); |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 728 | if (ACPI_FAILURE(status)) { |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 729 | goto exit; /* There is no _REG method present */ |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Execute the _REG method only if there is no Operation Region in |
| 734 | * this scope with the Embedded Controller space ID. Otherwise, it |
| 735 | * will already have been executed. Note, this allows for Regions |
| 736 | * with other space IDs to be present; but the code below will then |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 737 | * execute the _REG method with the embedded_control space_ID argument. |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 738 | */ |
| 739 | next_node = acpi_ns_get_next_node(ec_device_node, NULL); |
| 740 | while (next_node) { |
| 741 | if ((next_node->type == ACPI_TYPE_REGION) && |
| 742 | (next_node->object) && |
| 743 | (next_node->object->region.space_id == ACPI_ADR_SPACE_EC)) { |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 744 | goto exit; /* Do not execute the _REG */ |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 745 | } |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 746 | |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 747 | next_node = acpi_ns_get_next_node(ec_device_node, next_node); |
| 748 | } |
| 749 | |
Zhang Rui | 8f4f5e7 | 2013-05-30 10:02:13 +0800 | [diff] [blame] | 750 | /* Evaluate the _REG(embedded_control,Connect) method */ |
Bob Moore | e2066ca | 2011-04-13 13:22:04 +0800 | [diff] [blame] | 751 | |
| 752 | args.count = 2; |
| 753 | args.pointer = objects; |
| 754 | objects[0].type = ACPI_TYPE_INTEGER; |
| 755 | objects[0].integer.value = ACPI_ADR_SPACE_EC; |
| 756 | objects[1].type = ACPI_TYPE_INTEGER; |
| 757 | objects[1].integer.value = ACPI_REG_CONNECT; |
| 758 | |
| 759 | status = acpi_evaluate_object(reg_method, NULL, &args, NULL); |
| 760 | |
| 761 | exit: |
| 762 | /* We ignore all errors from above, don't care */ |
| 763 | |
| 764 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 765 | return_VOID; |
| 766 | } |