diff options
Diffstat (limited to 'drivers/acpi/dispatcher/dsmethod.c')
| -rw-r--r-- | drivers/acpi/dispatcher/dsmethod.c | 596 |
1 files changed, 0 insertions, 596 deletions
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c deleted file mode 100644 index 9fc3f4c033e..00000000000 --- a/drivers/acpi/dispatcher/dsmethod.c +++ /dev/null @@ -1,596 +0,0 @@ -/****************************************************************************** - * - * Module Name: dsmethod - Parser/Interpreter interface - control method parsing - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2005, R. Byron Moore - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions, and the following disclaimer, - * without modification. - * 2. Redistributions in binary form must reproduce at minimum a disclaimer - * substantially similar to the "NO WARRANTY" disclaimer below - * ("Disclaimer") and any redistribution must be conditioned upon - * including a substantially similar Disclaimer requirement for further - * binary redistribution. - * 3. Neither the names of the above-listed copyright holders nor the names - * of any contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * NO WARRANTY - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING - * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGES. - */ - - -#include <acpi/acpi.h> -#include <acpi/acparser.h> -#include <acpi/amlcode.h> -#include <acpi/acdispat.h> -#include <acpi/acinterp.h> -#include <acpi/acnamesp.h> - - -#define _COMPONENT ACPI_DISPATCHER - ACPI_MODULE_NAME ("dsmethod") - - -/******************************************************************************* - * - * FUNCTION: acpi_ds_parse_method - * - * PARAMETERS: obj_handle - Method node - * - * RETURN: Status - * - * DESCRIPTION: Call the parser and parse the AML that is associated with the - * method. - * - * MUTEX: Assumes parser is locked - * - ******************************************************************************/ - -acpi_status -acpi_ds_parse_method ( - acpi_handle obj_handle) -{ - acpi_status status; - union acpi_operand_object *obj_desc; - union acpi_parse_object *op; - struct acpi_namespace_node *node; - acpi_owner_id owner_id; - struct acpi_walk_state *walk_state; - - - ACPI_FUNCTION_TRACE_PTR ("ds_parse_method", obj_handle); - - - /* Parameter Validation */ - - if (!obj_handle) { - return_ACPI_STATUS (AE_NULL_ENTRY); - } - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** named_obj=%p\n", - acpi_ut_get_node_name (obj_handle), obj_handle)); - - /* Extract the method object from the method Node */ - - node = (struct acpi_namespace_node *) obj_handle; - obj_desc = acpi_ns_get_attached_object (node); - if (!obj_desc) { - return_ACPI_STATUS (AE_NULL_OBJECT); - } - - /* Create a mutex for the method if there is a concurrency limit */ - - if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) && - (!obj_desc->method.semaphore)) { - status = acpi_os_create_semaphore (obj_desc->method.concurrency, - obj_desc->method.concurrency, - &obj_desc->method.semaphore); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - } - - /* - * Allocate a new parser op to be the root of the parsed - * method tree - */ - op = acpi_ps_alloc_op (AML_METHOD_OP); - if (!op) { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - /* Init new op with the method name and pointer back to the Node */ - - acpi_ps_set_name (op, node->name.integer); - op->common.node = node; - - /* - * Get a new owner_id for objects created by this method. Namespace - * objects (such as Operation Regions) can be created during the - * first pass parse. - */ - owner_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD); - obj_desc->method.owning_id = owner_id; - - /* Create and initialize a new walk state */ - - walk_state = acpi_ds_create_walk_state (owner_id, NULL, NULL, NULL); - if (!walk_state) { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - status = acpi_ds_init_aml_walk (walk_state, op, node, - obj_desc->method.aml_start, - obj_desc->method.aml_length, NULL, 1); - if (ACPI_FAILURE (status)) { - acpi_ds_delete_walk_state (walk_state); - return_ACPI_STATUS (status); - } - - /* - * Parse the method, first pass - * - * The first pass load is where newly declared named objects are added into - * the namespace. Actual evaluation of the named objects (what would be - * called a "second pass") happens during the actual execution of the - * method so that operands to the named objects can take on dynamic - * run-time values. - */ - status = acpi_ps_parse_aml (walk_state); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n", - acpi_ut_get_node_name (obj_handle), obj_handle, op)); - - acpi_ps_delete_parse_tree (op); - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ds_begin_method_execution - * - * PARAMETERS: method_node - Node of the method - * obj_desc - The method object - * calling_method_node - Caller of this method (if non-null) - * - * RETURN: Status - * - * DESCRIPTION: Prepare a method for execution. Parses the method if necessary, - * increments the thread count, and waits at the method semaphore - * for clearance to execute. - * - ******************************************************************************/ - -acpi_status -acpi_ds_begin_method_execution ( - struct acpi_namespace_node *method_node, - union acpi_operand_object *obj_desc, - struct acpi_namespace_node *calling_method_node) -{ - acpi_status status = AE_OK; - - - ACPI_FUNCTION_TRACE_PTR ("ds_begin_method_execution", method_node); - - - if (!method_node) { - return_ACPI_STATUS (AE_NULL_ENTRY); - } - - /* - * If there is a concurrency limit on this method, we need to - * obtain a unit from the method semaphore. - */ - if (obj_desc->method.semaphore) { - /* - * Allow recursive method calls, up to the reentrancy/concurrency - * limit imposed by the SERIALIZED rule and the sync_level method - * parameter. - * - * The point of this code is to avoid permanently blocking a - * thread that is making recursive method calls. - */ - if (method_node == calling_method_node) { - if (obj_desc->method.thread_count >= obj_desc->method.concurrency) { - return_ACPI_STATUS (AE_AML_METHOD_LIMIT); - } - } - - /* - * Get a unit from the method semaphore. This releases the - * interpreter if we block - */ - status = acpi_ex_system_wait_semaphore (obj_desc->method.semaphore, - ACPI_WAIT_FOREVER); - } - - /* - * Increment the method parse tree thread count since it has been - * reentered one more time (even if it is the same thread) - */ - obj_desc->method.thread_count++; - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ds_call_control_method - * - * PARAMETERS: Thread - Info for this thread - * this_walk_state - Current walk state - * Op - Current Op to be walked - * - * RETURN: Status - * - * DESCRIPTION: Transfer execution to a called control method - * - ******************************************************************************/ - -acpi_status -acpi_ds_call_control_method ( - struct acpi_thread_state *thread, - struct acpi_walk_state *this_walk_state, - union acpi_parse_object *op) -{ - acpi_status status; - struct acpi_namespace_node *method_node; - struct acpi_walk_state *next_walk_state; - union acpi_operand_object *obj_desc; - struct acpi_parameter_info info; - u32 i; - - - ACPI_FUNCTION_TRACE_PTR ("ds_call_control_method", this_walk_state); - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n", - this_walk_state->prev_op, this_walk_state)); - - /* - * Get the namespace entry for the control method we are about to call - */ - method_node = this_walk_state->method_call_node; - if (!method_node) { - return_ACPI_STATUS (AE_NULL_ENTRY); - } - - obj_desc = acpi_ns_get_attached_object (method_node); - if (!obj_desc) { - return_ACPI_STATUS (AE_NULL_OBJECT); - } - - obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD); - - /* Init for new method, wait on concurrency semaphore */ - - status = acpi_ds_begin_method_execution (method_node, obj_desc, - this_walk_state->method_node); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - - if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) { - /* 1) Parse: Create a new walk state for the preempting walk */ - - next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id, - op, obj_desc, NULL); - if (!next_walk_state) { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - /* Create and init a Root Node */ - - op = acpi_ps_create_scope_op (); - if (!op) { - status = AE_NO_MEMORY; - goto cleanup; - } - - status = acpi_ds_init_aml_walk (next_walk_state, op, method_node, - obj_desc->method.aml_start, obj_desc->method.aml_length, - NULL, 1); - if (ACPI_FAILURE (status)) { - acpi_ds_delete_walk_state (next_walk_state); - goto cleanup; - } - - /* Begin AML parse */ - - status = acpi_ps_parse_aml (next_walk_state); - acpi_ps_delete_parse_tree (op); - } - - /* 2) Execute: Create a new state for the preempting walk */ - - next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id, - NULL, obj_desc, thread); - if (!next_walk_state) { - status = AE_NO_MEMORY; - goto cleanup; - } - /* - * The resolved arguments were put on the previous walk state's operand - * stack. Operands on the previous walk state stack always - * start at index 0. - * Null terminate the list of arguments - */ - this_walk_state->operands [this_walk_state->num_operands] = NULL; - - info.parameters = &this_walk_state->operands[0]; - info.parameter_type = ACPI_PARAM_ARGS; - - status = acpi_ds_init_aml_walk (next_walk_state, NULL, method_node, - obj_desc->method.aml_start, obj_desc->method.aml_length, - &info, 3); - if (ACPI_FAILURE (status)) { - goto cleanup; - } - - /* - * Delete the operands on the previous walkstate operand stack - * (they were copied to new objects) - */ - for (i = 0; i < obj_desc->method.param_count; i++) { - acpi_ut_remove_reference (this_walk_state->operands [i]); - this_walk_state->operands [i] = NULL; - } - - /* Clear the operand stack */ - - this_walk_state->num_operands = 0; - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "Starting nested execution, newstate=%p\n", next_walk_state)); - - if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) { - status = obj_desc->method.implementation (next_walk_state); - return_ACPI_STATUS (status); - } - - return_ACPI_STATUS (AE_OK); - - - /* On error, we must delete the new walk state */ - -cleanup: - if (next_walk_state && (next_walk_state->method_desc)) { - /* Decrement the thread count on the method parse tree */ - - next_walk_state->method_desc->method.thread_count--; - } - (void) acpi_ds_terminate_control_method (next_walk_state); - acpi_ds_delete_walk_state (next_walk_state); - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ds_restart_control_method - * - * PARAMETERS: walk_state - State for preempted method (caller) - * return_desc - Return value from the called method - * - * RETURN: Status - * - * DESCRIPTION: Restart a method that was preempted by another (nested) method - * invocation. Handle the return value (if any) from the callee. - * - ******************************************************************************/ - -acpi_status -acpi_ds_restart_control_method ( - struct acpi_walk_state *walk_state, - union acpi_operand_object *return_desc) -{ - acpi_status status; - - - ACPI_FUNCTION_TRACE_PTR ("ds_restart_control_method", walk_state); - - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "****Restart [%4.4s] Op %p return_value_from_callee %p\n", - (char *) &walk_state->method_node->name, walk_state->method_call_op, - return_desc)); - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - " return_from_this_method_used?=%X res_stack %p Walk %p\n", - walk_state->return_used, - walk_state->results, walk_state)); - - /* Did the called method return a value? */ - - if (return_desc) { - /* Are we actually going to use the return value? */ - - if (walk_state->return_used) { - /* Save the return value from the previous method */ - - status = acpi_ds_result_push (return_desc, walk_state); - if (ACPI_FAILURE (status)) { - acpi_ut_remove_reference (return_desc); - return_ACPI_STATUS (status); - } - - /* - * Save as THIS method's return value in case it is returned - * immediately to yet another method - */ - walk_state->return_desc = return_desc; - } - - /* - * The following code is the - * optional support for a so-called "implicit return". Some AML code - * assumes that the last value of the method is "implicitly" returned - * to the caller. Just save the last result as the return value. - * NOTE: this is optional because the ASL language does not actually - * support this behavior. - */ - else if (!acpi_ds_do_implicit_return (return_desc, walk_state, FALSE)) { - /* - * Delete the return value if it will not be used by the - * calling method - */ - acpi_ut_remove_reference (return_desc); - } - } - - return_ACPI_STATUS (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ds_terminate_control_method - * - * PARAMETERS: walk_state - State of the method - * - * RETURN: Status - * - * DESCRIPTION: Terminate a control method. Delete everything that the method - * created, delete all locals and arguments, and delete the parse - * tree if requested. - * - ******************************************************************************/ - -acpi_status -acpi_ds_terminate_control_method ( - struct acpi_walk_state *walk_state) -{ - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *method_node; - acpi_status status; - - - ACPI_FUNCTION_TRACE_PTR ("ds_terminate_control_method", walk_state); - - - if (!walk_state) { - return (AE_BAD_PARAMETER); - } - - /* The current method object was saved in the walk state */ - - obj_desc = walk_state->method_desc; - if (!obj_desc) { - return_ACPI_STATUS (AE_OK); - } - - /* Delete all arguments and locals */ - - acpi_ds_method_data_delete_all (walk_state); - - /* - * Lock the parser while we terminate this method. - * If this is the last thread executing the method, - * we have additional cleanup to perform - */ - status = acpi_ut_acquire_mutex (ACPI_MTX_PARSER); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - - /* Signal completion of the execution of this method if necessary */ - - if (walk_state->method_desc->method.semaphore) { - status = acpi_os_signal_semaphore ( - walk_state->method_desc->method.semaphore, 1); - if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (("Could not signal method semaphore\n")); - status = AE_OK; - - /* Ignore error and continue cleanup */ - } - } - - if (walk_state->method_desc->method.thread_count) { - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "*** Not deleting method namespace, there are still %d threads\n", - walk_state->method_desc->method.thread_count)); - } - - if (!walk_state->method_desc->method.thread_count) { - /* - * Support to dynamically change a method from not_serialized to - * Serialized if it appears that the method is written foolishly and - * does not support multiple thread execution. The best example of this - * is if such a method creates namespace objects and blocks. A second - * thread will fail with an AE_ALREADY_EXISTS exception - * - * This code is here because we must wait until the last thread exits - * before creating the synchronization semaphore. - */ - if ((walk_state->method_desc->method.concurrency == 1) && - (!walk_state->method_desc->method.semaphore)) { - status = acpi_os_create_semaphore (1, - 1, - &walk_state->method_desc->method.semaphore); - } - - /* - * There are no more threads executing this method. Perform - * additional cleanup. - * - * The method Node is stored in the walk state - */ - method_node = walk_state->method_node; - - /* - * Delete any namespace entries created immediately underneath - * the method - */ - status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - - if (method_node->child) { - acpi_ns_delete_namespace_subtree (method_node); - } - - /* - * Delete any namespace entries created anywhere else within - * the namespace - */ - acpi_ns_delete_namespace_by_owner (walk_state->method_desc->method.owning_id); - status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - } - - status = acpi_ut_release_mutex (ACPI_MTX_PARSER); - return_ACPI_STATUS (status); -} - - |