cregit-Linux how code gets into the kernel

Release 4.11 drivers/acpi/acpica/psxface.c

/******************************************************************************
 *
 * Module Name: psxface - Parser external interfaces
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, Intel Corp.
 * 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 "accommon.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "actables.h"
#include "acnamesp.h"


#define _COMPONENT          ACPI_PARSER
ACPI_MODULE_NAME("psxface")

/* Local Prototypes */
static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);

/*******************************************************************************
 *
 * FUNCTION:    acpi_debug_trace
 *
 * PARAMETERS:  method_name     - Valid ACPI name string
 *              debug_level     - Optional level mask. 0 to use default
 *              debug_layer     - Optional layer mask. 0 to use default
 *              flags           - bit 1: one shot(1) or persistent(0)
 *
 * RETURN:      Status
 *
 * DESCRIPTION: External interface to enable debug tracing during control
 *              method execution
 *
 ******************************************************************************/


acpi_status acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags) { acpi_status status; status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return (status); } acpi_gbl_trace_method_name = name; acpi_gbl_trace_flags = flags; acpi_gbl_trace_dbg_level = debug_level; acpi_gbl_trace_dbg_layer = debug_layer; status = AE_OK; (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return (status); }

Contributors

PersonTokensPropCommitsCommitProp
Robert Moore7193.42%150.00%
Lv Zheng56.58%150.00%
Total76100.00%2100.00%

/******************************************************************************* * * FUNCTION: acpi_ps_execute_method * * PARAMETERS: info - Method info block, contains: * node - Method Node to execute * obj_desc - Method object * parameters - List of parameters to pass to the method, * terminated by NULL. Params itself may be * NULL if no parameters are being passed. * return_object - Where to put method's return value (if * any). If NULL, no value is returned. * parameter_type - Type of Parameter list * return_object - Where to put method's return value (if * any). If NULL, no value is returned. * pass_number - Parse or execute pass * * RETURN: Status * * DESCRIPTION: Execute a control method * ******************************************************************************/
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) { acpi_status status; union acpi_parse_object *op; struct acpi_walk_state *walk_state; ACPI_FUNCTION_TRACE(ps_execute_method); /* Quick validation of DSDT header */ acpi_tb_check_dsdt_header(); /* Validate the Info and method Node */ if (!info || !info->node) { return_ACPI_STATUS(AE_NULL_ENTRY); } /* Init for new method, wait on concurrency semaphore */ status = acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* * The caller "owns" the parameters, so give each one an extra reference */ acpi_ps_update_parameter_list(info, REF_INCREMENT); /* * Execute the method. Performs parse simultaneously */ ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n", info->node->name.ascii, info->node, info->obj_desc)); /* Create and init a Root Node */ op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start); if (!op) { status = AE_NO_MEMORY; goto cleanup; } /* Create and initialize a new walk state */ info->pass_number = ACPI_IMODE_EXECUTE; walk_state = acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, NULL, NULL); if (!walk_state) { status = AE_NO_MEMORY; goto cleanup; } status = acpi_ds_init_aml_walk(walk_state, op, info->node, info->obj_desc->method.aml_start, info->obj_desc->method.aml_length, info, info->pass_number); if (ACPI_FAILURE(status)) { acpi_ds_delete_walk_state(walk_state); goto cleanup; } if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) { walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL; } /* Invoke an internal method if necessary */ if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) { status = info->obj_desc->method.dispatch.implementation(walk_state); info->return_object = walk_state->return_desc; /* Cleanup states */ acpi_ds_scope_stack_clear(walk_state); acpi_ps_cleanup_scope(&walk_state->parser_state); acpi_ds_terminate_control_method(walk_state->method_desc, walk_state); acpi_ds_delete_walk_state(walk_state); goto cleanup; } /* * Start method evaluation with an implicit return of zero. * This is done for Windows compatibility. */ if (acpi_gbl_enable_interpreter_slack) { walk_state->implicit_return_obj = acpi_ut_create_integer_object((u64) 0); if (!walk_state->implicit_return_obj) { status = AE_NO_MEMORY; acpi_ds_delete_walk_state(walk_state); goto cleanup; } } /* Parse the AML */ status = acpi_ps_parse_aml(walk_state); /* walk_state was deleted by parse_aml */ cleanup: acpi_ps_delete_parse_tree(op); /* Take away the extra reference that we gave the parameters above */ acpi_ps_update_parameter_list(info, REF_DECREMENT); /* Exit now if error above */ if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* * If the method has returned an object, signal this to the caller with * a control exception code */ if (info->return_object) { ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n", info->return_object)); ACPI_DUMP_STACK_ENTRY(info->return_object); status = AE_CTRL_RETURN_VALUE; } return_ACPI_STATUS(status); }

Contributors

PersonTokensPropCommitsCommitProp
Robert Moore15234.55%830.77%
Valery A. Podrezov11025.00%13.85%
Lin Ming6314.32%519.23%
Linus Torvalds4510.23%311.54%
Linus Torvalds (pre-git)337.50%27.69%
Len Brown214.77%311.54%
Lv Zheng92.05%13.85%
Andy Grover71.59%311.54%
Total440100.00%26100.00%

/******************************************************************************* * * FUNCTION: acpi_ps_execute_table * * PARAMETERS: info - Method info block, contains: * node - Node to where the is entered into the * namespace * obj_desc - Pseudo method object describing the AML * code of the entire table * pass_number - Parse or execute pass * * RETURN: Status * * DESCRIPTION: Execute a table * ******************************************************************************/
acpi_status acpi_ps_execute_table(struct acpi_evaluate_info *info) { acpi_status status; union acpi_parse_object *op = NULL; struct acpi_walk_state *walk_state = NULL; ACPI_FUNCTION_TRACE(ps_execute_table); /* Create and init a Root Node */ op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start); if (!op) { status = AE_NO_MEMORY; goto cleanup; } /* Create and initialize a new walk state */ walk_state = acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, NULL, NULL); if (!walk_state) { status = AE_NO_MEMORY; goto cleanup; } status = acpi_ds_init_aml_walk(walk_state, op, info->node, info->obj_desc->method.aml_start, info->obj_desc->method.aml_length, info, info->pass_number); if (ACPI_FAILURE(status)) { goto cleanup; } if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) { walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL; } /* Info->Node is the default location to load the table */ if (info->node && info->node != acpi_gbl_root_node) { status = acpi_ds_scope_stack_push(info->node, ACPI_TYPE_METHOD, walk_state); if (ACPI_FAILURE(status)) { goto cleanup; } } /* * Parse the AML, walk_state will be deleted by parse_aml */ acpi_ex_enter_interpreter(); status = acpi_ps_parse_aml(walk_state); acpi_ex_exit_interpreter(); walk_state = NULL; cleanup: if (walk_state) { acpi_ds_delete_walk_state(walk_state); } if (op) { acpi_ps_delete_parse_tree(op); } return_ACPI_STATUS(status); }

Contributors

PersonTokensPropCommitsCommitProp
Lv Zheng248100.00%3100.00%
Total248100.00%3100.00%

/******************************************************************************* * * FUNCTION: acpi_ps_update_parameter_list * * PARAMETERS: info - See struct acpi_evaluate_info * (Used: parameter_type and Parameters) * action - Add or Remove reference * * RETURN: Status * * DESCRIPTION: Update reference count on all method parameter objects * ******************************************************************************/
static void acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action) { u32 i; if (info->parameters) { /* Update reference count for each parameter */ for (i = 0; info->parameters[i]; i++) { /* Ignore errors, just do them all */ (void)acpi_ut_update_object_reference(info-> parameters[i], action); } } }

Contributors

PersonTokensPropCommitsCommitProp
Robert Moore5795.00%375.00%
Linus Torvalds35.00%125.00%
Total60100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Robert Moore30234.59%1332.50%
Lv Zheng26630.47%512.50%
Valery A. Podrezov11012.60%12.50%
Lin Ming647.33%615.00%
Linus Torvalds495.61%410.00%
Linus Torvalds (pre-git)475.38%25.00%
Len Brown252.86%410.00%
Andy Grover91.03%410.00%
Patrick Mochel10.11%12.50%
Total873100.00%40100.00%
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