ACPI_STATUS
AcpiRsCreatePciRoutingTable (
ACPI_OPERAND_OBJECT *PackageObject,
ACPI_BUFFER *OutputBuffer)
{
UINT8 *Buffer;
ACPI_OPERAND_OBJECT **TopObjectList;
ACPI_OPERAND_OBJECT **SubObjectList;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_SIZE BufferSizeNeeded = 0;
UINT32 NumberOfElements;
UINT32 Index;
ACPI_PCI_ROUTING_TABLE *UserPrt;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_BUFFER PathBuffer;
ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);
/* Params already validated, so we don't re-validate here */
/* Get the required buffer length */
Status = AcpiRsGetPciRoutingTableLength (PackageObject,
&BufferSizeNeeded);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
(UINT32) BufferSizeNeeded));
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (OutputBuffer, BufferSizeNeeded);
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 UINT64 Address, a UINT8 Pin,
* a Name, and a UINT8 SourceIndex.
*/
TopObjectList = PackageObject->Package.Elements;
NumberOfElements = PackageObject->Package.Count;
Buffer = OutputBuffer->Pointer;
UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
for (Index = 0; Index < NumberOfElements; Index++)
{
/*
* Point UserPrt past this current structure
*
* NOTE: On the first iteration, UserPrt->Length will
* be zero because we cleared the return buffer earlier
*/
Buffer += UserPrt->Length;
UserPrt = ACPI_CAST_PTR (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 UINT8 Source[4] member
* because it is added below.
*/
UserPrt->Length = (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
/* Each element of the top-level package must also be a package */
if ((*TopObjectList)->Common.Type != ACPI_TYPE_PACKAGE)
{
ACPI_ERROR ((AE_INFO,
"(PRT[%u]) Need sub-package, found %s",
Index, AcpiUtGetObjectTypeName (*TopObjectList)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Each sub-package must be of length 4 */
if ((*TopObjectList)->Package.Count != 4)
{
ACPI_ERROR ((AE_INFO,
"(PRT[%u]) Need package of length 4, found length %u",
Index, (*TopObjectList)->Package.Count));
return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
}
/*
* Dereference the sub-package.
* The SubObjectList will now point to an array of the four IRQ
* elements: [Address, Pin, Source, SourceIndex]
*/
SubObjectList = (*TopObjectList)->Package.Elements;
/* 1) First subobject: Dereference the PRT.Address */
ObjDesc = SubObjectList[0];
if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
{
ACPI_ERROR ((AE_INFO, "(PRT[%u].Address) Need Integer, found %s",
Index, AcpiUtGetObjectTypeName (ObjDesc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
UserPrt->Address = ObjDesc->Integer.Value;
/* 2) Second subobject: Dereference the PRT.Pin */
ObjDesc = SubObjectList[1];
if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
{
ACPI_ERROR ((AE_INFO, "(PRT[%u].Pin) Need Integer, found %s",
Index, AcpiUtGetObjectTypeName (ObjDesc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
UserPrt->Pin = (UINT32) ObjDesc->Integer.Value;
/*
* If the BIOS has erroneously reversed the _PRT SourceName (index 2)
* and the SourceIndex (index 3), fix it. _PRT is important enough to
* workaround this BIOS error. This also provides compatibility with
* other ACPI implementations.
*/
ObjDesc = SubObjectList[3];
if (!ObjDesc || (ObjDesc->Common.Type != ACPI_TYPE_INTEGER))
{
SubObjectList[3] = SubObjectList[2];
SubObjectList[2] = ObjDesc;
ACPI_WARNING ((AE_INFO,
"(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed",
Index));
}
/*
* 3) Third subobject: Dereference the PRT.SourceName
* The name may be unresolved (slack mode), so allow a null object
*/
ObjDesc = SubObjectList[2];
if (ObjDesc)
{
switch (ObjDesc->Common.Type)
{
case ACPI_TYPE_LOCAL_REFERENCE:
if (ObjDesc->Reference.Class != ACPI_REFCLASS_NAME)
{
ACPI_ERROR ((AE_INFO,
"(PRT[%u].Source) Need name, found Reference Class 0x%X",
Index, ObjDesc->Reference.Class));
return_ACPI_STATUS (AE_BAD_DATA);
}
Node = ObjDesc->Reference.Node;
/* Use *remaining* length of the buffer as max for pathname */
PathBuffer.Length = OutputBuffer->Length -
(UINT32) ((UINT8 *) UserPrt->Source -
(UINT8 *) OutputBuffer->Pointer);
PathBuffer.Pointer = UserPrt->Source;
Status = AcpiNsHandleToPathname ((ACPI_HANDLE) Node, &PathBuffer);
/* +1 to include null terminator */
UserPrt->Length += (UINT32) ACPI_STRLEN (UserPrt->Source) + 1;
break;
case ACPI_TYPE_STRING:
ACPI_STRCPY (UserPrt->Source, ObjDesc->String.Pointer);
/*
* Add to the Length field the length of the string
* (add 1 for terminator)
*/
UserPrt->Length += ObjDesc->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 UINT32 NULL
*/
UserPrt->Length += sizeof (UINT32);
break;
default:
ACPI_ERROR ((AE_INFO,
"(PRT[%u].Source) Need Ref/String/Integer, found %s",
Index, AcpiUtGetObjectTypeName (ObjDesc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
}
/* Now align the current length */
UserPrt->Length = (UINT32) ACPI_ROUND_UP_TO_64BIT (UserPrt->Length);
/* 4) Fourth subobject: Dereference the PRT.SourceIndex */
ObjDesc = SubObjectList[3];
if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
{
ACPI_ERROR ((AE_INFO,
"(PRT[%u].SourceIndex) Need Integer, found %s",
Index, AcpiUtGetObjectTypeName (ObjDesc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
UserPrt->SourceIndex = (UINT32) ObjDesc->Integer.Value;
/* Point to the next ACPI_OPERAND_OBJECT in the top level package */
TopObjectList++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
return_ACPI_STATUS (AE_OK);
}
acpi_status
acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object,
acpi_size * buffer_size_needed)
{
u32 number_of_elements;
acpi_size temp_size_needed = 0;
union acpi_operand_object **top_object_list;
u32 index;
union acpi_operand_object *package_element;
union acpi_operand_object **sub_object_list;
u8 name_found;
u32 table_index;
ACPI_FUNCTION_TRACE(rs_get_pci_routing_table_length);
number_of_elements = package_object->package.count;
/*
* Calculate the size of the return buffer.
* The base size is the number of elements * the sizes of the
* structures. Additional space for the strings is added below.
* The minus one is to subtract the size of the u8 Source[1]
* member because it is added below.
*
* But each PRT_ENTRY structure has a pointer to a string and
* the size of that string must be found.
*/
top_object_list = package_object->package.elements;
for (index = 0; index < number_of_elements; index++) {
/* Dereference the sub-package */
package_element = *top_object_list;
/*
* The sub_object_list will now point to an array of the
* four IRQ elements: Address, Pin, Source and source_index
*/
sub_object_list = package_element->package.elements;
/* Scan the irq_table_elements for the Source Name String */
name_found = FALSE;
for (table_index = 0; table_index < 4 && !name_found;
table_index++) {
if (*sub_object_list && /* Null object allowed */
((ACPI_TYPE_STRING ==
ACPI_GET_OBJECT_TYPE(*sub_object_list)) ||
((ACPI_TYPE_LOCAL_REFERENCE ==
ACPI_GET_OBJECT_TYPE(*sub_object_list)) &&
((*sub_object_list)->reference.opcode ==
AML_INT_NAMEPATH_OP)))) {
name_found = TRUE;
} else {
/* Look at the next element */
sub_object_list++;
}
}
temp_size_needed += (sizeof(struct acpi_pci_routing_table) - 4);
/* Was a String type found? */
if (name_found) {
if (ACPI_GET_OBJECT_TYPE(*sub_object_list) ==
ACPI_TYPE_STRING) {
/*
* The length String.Length field does not include the
* terminating NULL, add 1
*/
temp_size_needed += ((acpi_size)
(*sub_object_list)->string.
length + 1);
} else {
temp_size_needed +=
acpi_ns_get_pathname_length((*sub_object_list)->reference.node);
}
} else {
/*
* If no name was found, then this is a NULL, which is
* translated as a u32 zero.
*/
temp_size_needed += sizeof(u32);
}
/* Round up the size since each element must be aligned */
temp_size_needed = ACPI_ROUND_UP_TO_64BIT(temp_size_needed);
/* Point to the next union acpi_operand_object */
top_object_list++;
}
/*
* Add an extra element to the end of the list, essentially a
* NULL terminator
*/
*buffer_size_needed =
temp_size_needed + sizeof(struct acpi_pci_routing_table);
return_ACPI_STATUS(AE_OK);
}
ACPI_STATUS
AcpiRsGetPciRoutingTableLength (
ACPI_OPERAND_OBJECT *PackageObject,
ACPI_SIZE *BufferSizeNeeded)
{
UINT32 NumberOfElements;
ACPI_SIZE TempSizeNeeded = 0;
ACPI_OPERAND_OBJECT **TopObjectList;
UINT32 Index;
ACPI_OPERAND_OBJECT *PackageElement;
ACPI_OPERAND_OBJECT **SubObjectList;
BOOLEAN NameFound;
UINT32 TableIndex;
ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength);
NumberOfElements = PackageObject->Package.Count;
/*
* Calculate the size of the return buffer.
* The base size is the number of elements * the sizes of the
* structures. Additional space for the strings is added below.
* The minus one is to subtract the size of the UINT8 Source[1]
* member because it is added below.
*
* But each PRT_ENTRY structure has a pointer to a string and
* the size of that string must be found.
*/
TopObjectList = PackageObject->Package.Elements;
for (Index = 0; Index < NumberOfElements; Index++)
{
/* Dereference the subpackage */
PackageElement = *TopObjectList;
/* We must have a valid Package object */
if (!PackageElement ||
(PackageElement->Common.Type != ACPI_TYPE_PACKAGE))
{
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* The SubObjectList will now point to an array of the
* four IRQ elements: Address, Pin, Source and SourceIndex
*/
SubObjectList = PackageElement->Package.Elements;
/* Scan the IrqTableElements for the Source Name String */
NameFound = FALSE;
for (TableIndex = 0;
TableIndex < PackageElement->Package.Count && !NameFound;
TableIndex++)
{
if (*SubObjectList && /* Null object allowed */
((ACPI_TYPE_STRING ==
(*SubObjectList)->Common.Type) ||
((ACPI_TYPE_LOCAL_REFERENCE ==
(*SubObjectList)->Common.Type) &&
((*SubObjectList)->Reference.Class ==
ACPI_REFCLASS_NAME))))
{
NameFound = TRUE;
}
else
{
/* Look at the next element */
SubObjectList++;
}
}
TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
/* Was a String type found? */
if (NameFound)
{
if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING)
{
/*
* The length String.Length field does not include the
* terminating NULL, add 1
*/
TempSizeNeeded += ((ACPI_SIZE)
(*SubObjectList)->String.Length + 1);
}
else
{
TempSizeNeeded += AcpiNsGetPathnameLength (
(*SubObjectList)->Reference.Node);
}
}
else
{
/*
* If no name was found, then this is a NULL, which is
* translated as a UINT32 zero.
*/
TempSizeNeeded += sizeof (UINT32);
}
/* Round up the size since each element must be aligned */
TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded);
/* Point to the next ACPI_OPERAND_OBJECT */
TopObjectList++;
}
/*
* Add an extra element to the end of the list, essentially a
* NULL terminator
*/
*BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE);
return_ACPI_STATUS (AE_OK);
}
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
* acpi_integer 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++) {
int source_name_index = 2;
int source_index_index = 3;
/*
* 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 element of the top-level package must also be a package */
if (ACPI_GET_OBJECT_TYPE(*top_object_list) != ACPI_TYPE_PACKAGE) {
ACPI_ERROR((AE_INFO,
"(PRT[%X]) Need sub-package, found %s",
index,
acpi_ut_get_object_type_name
(*top_object_list)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/* Each sub-package must be of length 4 */
if ((*top_object_list)->package.count != 4) {
ACPI_ERROR((AE_INFO,
"(PRT[%X]) Need package of length 4, found length %d",
index, (*top_object_list)->package.count));
return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
}
/*
* Dereference the sub-package.
* 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 (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->address = obj_desc->integer.value;
} else {
ACPI_ERROR((AE_INFO,
"(PRT[%X].Address) Need Integer, found %s",
index,
acpi_ut_get_object_type_name(obj_desc)));
return_ACPI_STATUS(AE_BAD_DATA);
}
/* 2) Second subobject: Dereference the PRT.Pin */
obj_desc = sub_object_list[1];
if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->pin = (u32) obj_desc->integer.value;
} else {
ACPI_ERROR((AE_INFO,
"(PRT[%X].Pin) Need Integer, found %s",
index,
acpi_ut_get_object_type_name(obj_desc)));
return_ACPI_STATUS(AE_BAD_DATA);
}
/*
* If BIOS erroneously reversed the _PRT source_name and source_index,
* then reverse them back.
*/
if (ACPI_GET_OBJECT_TYPE(sub_object_list[3]) !=
ACPI_TYPE_INTEGER) {
if (acpi_gbl_enable_interpreter_slack) {
source_name_index = 3;
source_index_index = 2;
printk(KERN_WARNING
"ACPI: Handling Garbled _PRT entry\n");
} else {
ACPI_ERROR((AE_INFO,
"(PRT[%X].source_index) Need Integer, found %s",
index,
acpi_ut_get_object_type_name
(sub_object_list[3])));
return_ACPI_STATUS(AE_BAD_DATA);
}
}
/*
* 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[source_name_index];
if (obj_desc) {
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
case ACPI_TYPE_LOCAL_REFERENCE:
if (obj_desc->reference.opcode !=
AML_INT_NAMEPATH_OP) {
ACPI_ERROR((AE_INFO,
"(PRT[%X].Source) Need name, found reference op %X",
index,
obj_desc->reference.
opcode));
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);
/* +1 to include null terminator */
user_prt->length +=
(u32) ACPI_STRLEN(user_prt->source) + 1;
break;
case ACPI_TYPE_STRING:
ACPI_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[%X].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[source_index_index];
if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->source_index = (u32) obj_desc->integer.value;
} else {
ACPI_ERROR((AE_INFO,
"(PRT[%X].SourceIndex) Need Integer, found %s",
index,
acpi_ut_get_object_type_name(obj_desc)));
return_ACPI_STATUS(AE_BAD_DATA);
}
/* 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);
}