0,0 → 1,483 |
/******************************************************************************* |
* |
* Module Name: rscreate - Create resource lists/tables |
* |
******************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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 "acresrc.h" |
#include "acnamesp.h" |
|
#define _COMPONENT ACPI_RESOURCES |
ACPI_MODULE_NAME("rscreate") |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_buffer_to_resource |
* |
* PARAMETERS: aml_buffer - Pointer to the resource byte stream |
* aml_buffer_length - Length of the aml_buffer |
* resource_ptr - Where the converted resource is returned |
* |
* RETURN: Status |
* |
* DESCRIPTION: Convert a raw AML buffer to a resource list |
* |
******************************************************************************/ |
acpi_status |
acpi_buffer_to_resource(u8 *aml_buffer, |
u16 aml_buffer_length, |
struct acpi_resource **resource_ptr) |
{ |
acpi_status status; |
acpi_size list_size_needed; |
void *resource; |
void *current_resource_ptr; |
|
ACPI_FUNCTION_TRACE(acpi_buffer_to_resource); |
|
/* |
* Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag |
* is not required here. |
*/ |
|
/* Get the required length for the converted resource */ |
|
status = acpi_rs_get_list_length(aml_buffer, aml_buffer_length, |
&list_size_needed); |
if (status == AE_AML_NO_RESOURCE_END_TAG) { |
status = AE_OK; |
} |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Allocate a buffer for the converted resource */ |
|
resource = ACPI_ALLOCATE_ZEROED(list_size_needed); |
current_resource_ptr = resource; |
if (!resource) { |
return_ACPI_STATUS(AE_NO_MEMORY); |
} |
|
/* Perform the AML-to-Resource conversion */ |
|
status = acpi_ut_walk_aml_resources(NULL, aml_buffer, aml_buffer_length, |
acpi_rs_convert_aml_to_resources, |
¤t_resource_ptr); |
if (status == AE_AML_NO_RESOURCE_END_TAG) { |
status = AE_OK; |
} |
if (ACPI_FAILURE(status)) { |
ACPI_FREE(resource); |
} else { |
*resource_ptr = resource; |
} |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_buffer_to_resource) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_rs_create_resource_list |
* |
* PARAMETERS: aml_buffer - Pointer to the resource byte stream |
* output_buffer - Pointer to the user's buffer |
* |
* RETURN: Status: AE_OK if okay, else a valid acpi_status code |
* If output_buffer is not large enough, output_buffer_length |
* indicates how large output_buffer should be, else it |
* indicates how may u8 elements of output_buffer are valid. |
* |
* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method |
* execution and parses the stream to create a linked list |
* of device resources. |
* |
******************************************************************************/ |
acpi_status |
acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer, |
struct acpi_buffer *output_buffer) |
{ |
|
acpi_status status; |
u8 *aml_start; |
acpi_size list_size_needed = 0; |
u32 aml_buffer_length; |
void *resource; |
|
ACPI_FUNCTION_TRACE(rs_create_resource_list); |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlBuffer = %p\n", aml_buffer)); |
|
/* Params already validated, so we don't re-validate here */ |
|
aml_buffer_length = aml_buffer->buffer.length; |
aml_start = aml_buffer->buffer.pointer; |
|
/* |
* Pass the aml_buffer into a module that can calculate |
* the buffer size needed for the linked list |
*/ |
status = acpi_rs_get_list_length(aml_start, aml_buffer_length, |
&list_size_needed); |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n", |
status, (u32) list_size_needed)); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Validate/Allocate/Clear caller buffer */ |
|
status = acpi_ut_initialize_buffer(output_buffer, list_size_needed); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Do the conversion */ |
|
resource = output_buffer->pointer; |
status = acpi_ut_walk_aml_resources(NULL, aml_start, aml_buffer_length, |
acpi_rs_convert_aml_to_resources, |
&resource); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n", |
output_buffer->pointer, (u32) output_buffer->length)); |
return_ACPI_STATUS(AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_rs_create_pci_routing_table |
* |
* PARAMETERS: package_object - Pointer to a package containing one |
* of more ACPI_OPERAND_OBJECTs |
* output_buffer - Pointer to the user's buffer |
* |
* RETURN: Status AE_OK if okay, else a valid acpi_status code. |
* If the output_buffer is too small, the error will be |
* AE_BUFFER_OVERFLOW and output_buffer->Length will point |
* to the size buffer needed. |
* |
* DESCRIPTION: Takes the union acpi_operand_object package and creates a |
* linked list of PCI interrupt descriptions |
* |
* NOTE: It is the caller's responsibility to ensure that the start of the |
* output buffer is aligned properly (if necessary). |
* |
******************************************************************************/ |
|
acpi_status |
acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object, |
struct acpi_buffer *output_buffer) |
{ |
u8 *buffer; |
union acpi_operand_object **top_object_list; |
union acpi_operand_object **sub_object_list; |
union acpi_operand_object *obj_desc; |
acpi_size buffer_size_needed = 0; |
u32 number_of_elements; |
u32 index; |
struct acpi_pci_routing_table *user_prt; |
struct acpi_namespace_node *node; |
acpi_status status; |
struct acpi_buffer path_buffer; |
|
ACPI_FUNCTION_TRACE(rs_create_pci_routing_table); |
|
/* Params already validated, so we don't re-validate here */ |
|
/* Get the required buffer length */ |
|
status = acpi_rs_get_pci_routing_table_length(package_object, |
&buffer_size_needed); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "BufferSizeNeeded = %X\n", |
(u32) buffer_size_needed)); |
|
/* Validate/Allocate/Clear caller buffer */ |
|
status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* |
* Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a |
* package that in turn contains an u64 Address, a u8 Pin, |
* a Name, and a u8 source_index. |
*/ |
top_object_list = package_object->package.elements; |
number_of_elements = package_object->package.count; |
buffer = output_buffer->pointer; |
user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer); |
|
for (index = 0; index < number_of_elements; index++) { |
|
/* |
* Point user_prt past this current structure |
* |
* NOTE: On the first iteration, user_prt->Length will |
* be zero because we cleared the return buffer earlier |
*/ |
buffer += user_prt->length; |
user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer); |
|
/* |
* Fill in the Length field with the information we have at this point. |
* The minus four is to subtract the size of the u8 Source[4] member |
* because it is added below. |
*/ |
user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4); |
|
/* Each subpackage must be of length 4 */ |
|
if ((*top_object_list)->package.count != 4) { |
ACPI_ERROR((AE_INFO, |
"(PRT[%u]) Need package of length 4, found length %u", |
index, (*top_object_list)->package.count)); |
return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT); |
} |
|
/* |
* Dereference the subpackage. |
* The sub_object_list will now point to an array of the four IRQ |
* elements: [Address, Pin, Source, source_index] |
*/ |
sub_object_list = (*top_object_list)->package.elements; |
|
/* 1) First subobject: Dereference the PRT.Address */ |
|
obj_desc = sub_object_list[0]; |
if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) { |
ACPI_ERROR((AE_INFO, |
"(PRT[%u].Address) Need Integer, found %s", |
index, |
acpi_ut_get_object_type_name(obj_desc))); |
return_ACPI_STATUS(AE_BAD_DATA); |
} |
|
user_prt->address = obj_desc->integer.value; |
|
/* 2) Second subobject: Dereference the PRT.Pin */ |
|
obj_desc = sub_object_list[1]; |
if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) { |
ACPI_ERROR((AE_INFO, |
"(PRT[%u].Pin) Need Integer, found %s", |
index, |
acpi_ut_get_object_type_name(obj_desc))); |
return_ACPI_STATUS(AE_BAD_DATA); |
} |
|
user_prt->pin = (u32) obj_desc->integer.value; |
|
/* |
* 3) Third subobject: Dereference the PRT.source_name |
* The name may be unresolved (slack mode), so allow a null object |
*/ |
obj_desc = sub_object_list[2]; |
if (obj_desc) { |
switch (obj_desc->common.type) { |
case ACPI_TYPE_LOCAL_REFERENCE: |
|
if (obj_desc->reference.class != |
ACPI_REFCLASS_NAME) { |
ACPI_ERROR((AE_INFO, |
"(PRT[%u].Source) Need name, found Reference Class 0x%X", |
index, |
obj_desc->reference.class)); |
return_ACPI_STATUS(AE_BAD_DATA); |
} |
|
node = obj_desc->reference.node; |
|
/* Use *remaining* length of the buffer as max for pathname */ |
|
path_buffer.length = output_buffer->length - |
(u32) ((u8 *) user_prt->source - |
(u8 *) output_buffer->pointer); |
path_buffer.pointer = user_prt->source; |
|
status = |
acpi_ns_handle_to_pathname((acpi_handle) |
node, |
&path_buffer, |
FALSE); |
|
/* +1 to include null terminator */ |
|
user_prt->length += |
(u32)strlen(user_prt->source) + 1; |
break; |
|
case ACPI_TYPE_STRING: |
|
strcpy(user_prt->source, |
obj_desc->string.pointer); |
|
/* |
* Add to the Length field the length of the string |
* (add 1 for terminator) |
*/ |
user_prt->length += obj_desc->string.length + 1; |
break; |
|
case ACPI_TYPE_INTEGER: |
/* |
* If this is a number, then the Source Name is NULL, since the |
* entire buffer was zeroed out, we can leave this alone. |
* |
* Add to the Length field the length of the u32 NULL |
*/ |
user_prt->length += sizeof(u32); |
break; |
|
default: |
|
ACPI_ERROR((AE_INFO, |
"(PRT[%u].Source) Need Ref/String/Integer, found %s", |
index, |
acpi_ut_get_object_type_name |
(obj_desc))); |
return_ACPI_STATUS(AE_BAD_DATA); |
} |
} |
|
/* Now align the current length */ |
|
user_prt->length = |
(u32) ACPI_ROUND_UP_TO_64BIT(user_prt->length); |
|
/* 4) Fourth subobject: Dereference the PRT.source_index */ |
|
obj_desc = sub_object_list[3]; |
if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) { |
ACPI_ERROR((AE_INFO, |
"(PRT[%u].SourceIndex) Need Integer, found %s", |
index, |
acpi_ut_get_object_type_name(obj_desc))); |
return_ACPI_STATUS(AE_BAD_DATA); |
} |
|
user_prt->source_index = (u32) obj_desc->integer.value; |
|
/* Point to the next union acpi_operand_object in the top level package */ |
|
top_object_list++; |
} |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n", |
output_buffer->pointer, (u32) output_buffer->length)); |
return_ACPI_STATUS(AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_rs_create_aml_resources |
* |
* PARAMETERS: resource_list - Pointer to the resource list buffer |
* output_buffer - Where the AML buffer is returned |
* |
* RETURN: Status AE_OK if okay, else a valid acpi_status code. |
* If the output_buffer is too small, the error will be |
* AE_BUFFER_OVERFLOW and output_buffer->Length will point |
* to the size buffer needed. |
* |
* DESCRIPTION: Converts a list of device resources to an AML bytestream |
* to be used as input for the _SRS control method. |
* |
******************************************************************************/ |
|
acpi_status |
acpi_rs_create_aml_resources(struct acpi_buffer *resource_list, |
struct acpi_buffer *output_buffer) |
{ |
acpi_status status; |
acpi_size aml_size_needed = 0; |
|
ACPI_FUNCTION_TRACE(rs_create_aml_resources); |
|
/* Params already validated, no need to re-validate here */ |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ResourceList Buffer = %p\n", |
resource_list->pointer)); |
|
/* Get the buffer size needed for the AML byte stream */ |
|
status = acpi_rs_get_aml_length(resource_list->pointer, |
resource_list->length, |
&aml_size_needed); |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n", |
(u32)aml_size_needed, acpi_format_exception(status))); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Validate/Allocate/Clear caller buffer */ |
|
status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Do the conversion */ |
|
status = acpi_rs_convert_resources_to_aml(resource_list->pointer, |
aml_size_needed, |
output_buffer->pointer); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n", |
output_buffer->pointer, (u32) output_buffer->length)); |
return_ACPI_STATUS(AE_OK); |
} |