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-rw-r--r--drivers/acpi/dispatcher/dsfield.c601
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diff --git a/drivers/acpi/dispatcher/dsfield.c b/drivers/acpi/dispatcher/dsfield.c
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index 000000000000..2779211be756
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+++ b/drivers/acpi/dispatcher/dsfield.c
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+/******************************************************************************
+ *
+ * Module Name: dsfield - Dispatcher field routines
+ *
+ *****************************************************************************/
+
+/*
+ * 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/amlcode.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+
+
+#define _COMPONENT ACPI_DISPATCHER
+ ACPI_MODULE_NAME ("dsfield")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_buffer_field
+ *
+ * PARAMETERS: Opcode - The opcode to be executed
+ * Operands - List of operands for the opcode
+ * walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute the create_field operators:
+ * create_bit_field_op,
+ * create_byte_field_op,
+ * create_word_field_op,
+ * create_dword_field_op,
+ * create_qword_field_op,
+ * create_field_op (all of which define fields in buffers)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_buffer_field (
+ union acpi_parse_object *op,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_parse_object *arg;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *second_desc = NULL;
+ u32 flags;
+
+
+ ACPI_FUNCTION_TRACE ("ds_create_buffer_field");
+
+
+ /* Get the name_string argument */
+
+ if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
+ arg = acpi_ps_get_arg (op, 3);
+ }
+ else {
+ /* Create Bit/Byte/Word/Dword field */
+
+ arg = acpi_ps_get_arg (op, 2);
+ }
+
+ if (!arg) {
+ return_ACPI_STATUS (AE_AML_NO_OPERAND);
+ }
+
+ if (walk_state->deferred_node) {
+ node = walk_state->deferred_node;
+ status = AE_OK;
+ }
+ else {
+ /*
+ * During the load phase, we want to enter the name of the field into
+ * the namespace. During the execute phase (when we evaluate the size
+ * operand), we want to lookup the name
+ */
+ if (walk_state->parse_flags & ACPI_PARSE_EXECUTE) {
+ flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE;
+ }
+ else {
+ flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND;
+ }
+
+ /*
+ * Enter the name_string into the namespace
+ */
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
+ ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1,
+ flags, walk_state, &(node));
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.string, status);
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ /* We could put the returned object (Node) on the object stack for later, but
+ * for now, we will put it in the "op" object that the parser uses, so we
+ * can get it again at the end of this scope
+ */
+ op->common.node = node;
+
+ /*
+ * If there is no object attached to the node, this node was just created and
+ * we need to create the field object. Otherwise, this was a lookup of an
+ * existing node and we don't want to create the field object again.
+ */
+ obj_desc = acpi_ns_get_attached_object (node);
+ if (obj_desc) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /*
+ * The Field definition is not fully parsed at this time.
+ * (We must save the address of the AML for the buffer and index operands)
+ */
+
+ /* Create the buffer field object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER_FIELD);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /*
+ * Remember location in AML stream of the field unit
+ * opcode and operands -- since the buffer and index
+ * operands must be evaluated.
+ */
+ second_desc = obj_desc->common.next_object;
+ second_desc->extra.aml_start = op->named.data;
+ second_desc->extra.aml_length = op->named.length;
+ obj_desc->buffer_field.node = node;
+
+ /* Attach constructed field descriptors to parent node */
+
+ status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+
+cleanup:
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_get_field_names
+ *
+ * PARAMETERS: Info - create_field info structure
+ * ` walk_state - Current method state
+ * Arg - First parser arg for the field name list
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Process all named fields in a field declaration. Names are
+ * entered into the namespace.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_get_field_names (
+ struct acpi_create_field_info *info,
+ struct acpi_walk_state *walk_state,
+ union acpi_parse_object *arg)
+{
+ acpi_status status;
+ acpi_integer position;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_get_field_names", info);
+
+
+ /* First field starts at bit zero */
+
+ info->field_bit_position = 0;
+
+ /* Process all elements in the field list (of parse nodes) */
+
+ while (arg) {
+ /*
+ * Three types of field elements are handled:
+ * 1) Offset - specifies a bit offset
+ * 2) access_as - changes the access mode
+ * 3) Name - Enters a new named field into the namespace
+ */
+ switch (arg->common.aml_opcode) {
+ case AML_INT_RESERVEDFIELD_OP:
+
+ position = (acpi_integer) info->field_bit_position
+ + (acpi_integer) arg->common.value.size;
+
+ if (position > ACPI_UINT32_MAX) {
+ ACPI_REPORT_ERROR (("Bit offset within field too large (> 0xFFFFFFFF)\n"));
+ return_ACPI_STATUS (AE_SUPPORT);
+ }
+
+ info->field_bit_position = (u32) position;
+ break;
+
+
+ case AML_INT_ACCESSFIELD_OP:
+
+ /*
+ * Get a new access_type and access_attribute -- to be used for all
+ * field units that follow, until field end or another access_as keyword.
+ *
+ * In field_flags, preserve the flag bits other than the ACCESS_TYPE bits
+ */
+ info->field_flags = (u8) ((info->field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
+ ((u8) ((u32) arg->common.value.integer >> 8)));
+
+ info->attribute = (u8) (arg->common.value.integer);
+ break;
+
+
+ case AML_INT_NAMEDFIELD_OP:
+
+ /* Lookup the name */
+
+ status = acpi_ns_lookup (walk_state->scope_info,
+ (char *) &arg->named.name,
+ info->field_type, ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
+ walk_state, &info->field_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR ((char *) &arg->named.name, status);
+ if (status != AE_ALREADY_EXISTS) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Already exists, ignore error */
+ }
+ else {
+ arg->common.node = info->field_node;
+ info->field_bit_length = arg->common.value.size;
+
+ /* Create and initialize an object for the new Field Node */
+
+ status = acpi_ex_prep_field_value (info);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ /* Keep track of bit position for the next field */
+
+ position = (acpi_integer) info->field_bit_position
+ + (acpi_integer) arg->common.value.size;
+
+ if (position > ACPI_UINT32_MAX) {
+ ACPI_REPORT_ERROR (("Field [%4.4s] bit offset too large (> 0xFFFFFFFF)\n",
+ (char *) &info->field_node->name));
+ return_ACPI_STATUS (AE_SUPPORT);
+ }
+
+ info->field_bit_position += info->field_bit_length;
+ break;
+
+
+ default:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid opcode in field list: %X\n",
+ arg->common.aml_opcode));
+ return_ACPI_STATUS (AE_AML_BAD_OPCODE);
+ }
+
+ arg = arg->common.next;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_field
+ *
+ * PARAMETERS: Op - Op containing the Field definition and args
+ * region_node - Object for the containing Operation Region
+ * ` walk_state - Current method state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new field in the specified operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_field (
+ union acpi_parse_object *op,
+ struct acpi_namespace_node *region_node,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_parse_object *arg;
+ struct acpi_create_field_info info;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_create_field", op);
+
+
+ /* First arg is the name of the parent op_region (must already exist) */
+
+ arg = op->common.value.arg;
+ if (!region_node) {
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.name,
+ ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state, &region_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.name, status);
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ /* Second arg is the field flags */
+
+ arg = arg->common.next;
+ info.field_flags = (u8) arg->common.value.integer;
+ info.attribute = 0;
+
+ /* Each remaining arg is a Named Field */
+
+ info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD;
+ info.region_node = region_node;
+
+ status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_init_field_objects
+ *
+ * PARAMETERS: Op - Op containing the Field definition and args
+ * ` walk_state - Current method state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: For each "Field Unit" name in the argument list that is
+ * part of the field declaration, enter the name into the
+ * namespace.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_init_field_objects (
+ union acpi_parse_object *op,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_parse_object *arg = NULL;
+ struct acpi_namespace_node *node;
+ u8 type = 0;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_init_field_objects", op);
+
+
+ switch (walk_state->opcode) {
+ case AML_FIELD_OP:
+ arg = acpi_ps_get_arg (op, 2);
+ type = ACPI_TYPE_LOCAL_REGION_FIELD;
+ break;
+
+ case AML_BANK_FIELD_OP:
+ arg = acpi_ps_get_arg (op, 4);
+ type = ACPI_TYPE_LOCAL_BANK_FIELD;
+ break;
+
+ case AML_INDEX_FIELD_OP:
+ arg = acpi_ps_get_arg (op, 3);
+ type = ACPI_TYPE_LOCAL_INDEX_FIELD;
+ break;
+
+ default:
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Walk the list of entries in the field_list
+ */
+ while (arg) {
+ /* Ignore OFFSET and ACCESSAS terms here */
+
+ if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
+ status = acpi_ns_lookup (walk_state->scope_info,
+ (char *) &arg->named.name,
+ type, ACPI_IMODE_LOAD_PASS1,
+ ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND,
+ walk_state, &node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR ((char *) &arg->named.name, status);
+ if (status != AE_ALREADY_EXISTS) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Name already exists, just ignore this error */
+
+ status = AE_OK;
+ }
+
+ arg->common.node = node;
+ }
+
+ /* Move to next field in the list */
+
+ arg = arg->common.next;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_bank_field
+ *
+ * PARAMETERS: Op - Op containing the Field definition and args
+ * region_node - Object for the containing Operation Region
+ * ` walk_state - Current method state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new bank field in the specified operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_bank_field (
+ union acpi_parse_object *op,
+ struct acpi_namespace_node *region_node,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_parse_object *arg;
+ struct acpi_create_field_info info;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_create_bank_field", op);
+
+
+ /* First arg is the name of the parent op_region (must already exist) */
+
+ arg = op->common.value.arg;
+ if (!region_node) {
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.name,
+ ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state, &region_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.name, status);
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ /* Second arg is the Bank Register (Field) (must already exist) */
+
+ arg = arg->common.next;
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
+ ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state, &info.register_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.string, status);
+ return_ACPI_STATUS (status);
+ }
+
+ /* Third arg is the bank_value */
+
+ arg = arg->common.next;
+ info.bank_value = (u32) arg->common.value.integer;
+
+ /* Fourth arg is the field flags */
+
+ arg = arg->common.next;
+ info.field_flags = (u8) arg->common.value.integer;
+
+ /* Each remaining arg is a Named Field */
+
+ info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD;
+ info.region_node = region_node;
+
+ status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_index_field
+ *
+ * PARAMETERS: Op - Op containing the Field definition and args
+ * region_node - Object for the containing Operation Region
+ * ` walk_state - Current method state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new index field in the specified operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_index_field (
+ union acpi_parse_object *op,
+ struct acpi_namespace_node *region_node,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_parse_object *arg;
+ struct acpi_create_field_info info;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_create_index_field", op);
+
+
+ /* First arg is the name of the Index register (must already exist) */
+
+ arg = op->common.value.arg;
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
+ ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state, &info.register_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.string, status);
+ return_ACPI_STATUS (status);
+ }
+
+ /* Second arg is the data register (must already exist) */
+
+ arg = arg->common.next;
+ status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
+ ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state, &info.data_register_node);
+ if (ACPI_FAILURE (status)) {
+ ACPI_REPORT_NSERROR (arg->common.value.string, status);
+ return_ACPI_STATUS (status);
+ }
+
+ /* Next arg is the field flags */
+
+ arg = arg->common.next;
+ info.field_flags = (u8) arg->common.value.integer;
+
+ /* Each remaining arg is a Named Field */
+
+ info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD;
+ info.region_node = region_node;
+
+ status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
+
+ return_ACPI_STATUS (status);
+}
+
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.