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ACPICA: _CID support for PCI Root Bridge detection.
Implemented _CID support for PCI Root Bridge detection. If the _HID does not match the predefined root bridge IDs, the _CID list (if present) is now obtained and also checked for an ID match Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore
Len Brown
parent
d1fdda83f7
commit
b7a6980630
@ -48,6 +48,11 @@
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evrgnini")
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/* Local prototypes */
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static u8 acpi_ev_match_pci_root_bridge(char *id);
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static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_system_memory_region_setup
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@ -62,6 +67,7 @@ ACPI_MODULE_NAME("evrgnini")
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* DESCRIPTION: Setup a system_memory operation region
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*
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******************************************************************************/
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acpi_status
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acpi_ev_system_memory_region_setup(acpi_handle handle,
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u32 function,
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@ -168,9 +174,9 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
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union acpi_operand_object *handler_obj;
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struct acpi_namespace_node *parent_node;
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struct acpi_namespace_node *pci_root_node;
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struct acpi_namespace_node *pci_device_node;
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union acpi_operand_object *region_obj =
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(union acpi_operand_object *)handle;
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struct acpi_device_id object_hID;
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ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
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@ -215,45 +221,30 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
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pci_root_node = parent_node;
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while (pci_root_node != acpi_gbl_root_node) {
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status =
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acpi_ut_execute_HID(pci_root_node, &object_hID);
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if (ACPI_SUCCESS(status)) {
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/*
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* Got a valid _HID string, check if this is a PCI root.
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* New for ACPI 3.0: check for a PCI Express root also.
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*/
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if (!
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(ACPI_STRNCMP
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(object_hID.value, PCI_ROOT_HID_STRING,
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sizeof(PCI_ROOT_HID_STRING)))
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||
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!(ACPI_STRNCMP
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(object_hID.value,
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PCI_EXPRESS_ROOT_HID_STRING,
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sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
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/* Install a handler for this PCI root bridge */
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/* Get the _HID/_CID in order to detect a root_bridge */
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status =
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acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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if (status == AE_SAME_HANDLER) {
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/*
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* It is OK if the handler is already installed on the root
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* bridge. Still need to return a context object for the
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* new PCI_Config operation region, however.
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*/
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status = AE_OK;
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} else {
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ACPI_EXCEPTION((AE_INFO,
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status,
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"Could not install PciConfig handler for Root Bridge %4.4s",
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acpi_ut_get_node_name
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(pci_root_node)));
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}
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if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
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/* Install a handler for this PCI root bridge */
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status = acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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if (status == AE_SAME_HANDLER) {
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/*
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* It is OK if the handler is already installed on the root
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* bridge. Still need to return a context object for the
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* new PCI_Config operation region, however.
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*/
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status = AE_OK;
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} else {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not install PciConfig handler for Root Bridge %4.4s",
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acpi_ut_get_node_name
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(pci_root_node)));
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}
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break;
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}
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break;
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}
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pci_root_node = acpi_ns_get_parent_node(pci_root_node);
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@ -282,14 +273,25 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
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/*
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* For PCI_Config space access, we need the segment, bus,
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* device and function numbers. Acquire them here.
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*
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* Find the parent device object. (This allows the operation region to be
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* within a subscope under the device, such as a control method.)
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*/
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pci_device_node = region_obj->region.node;
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while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
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pci_device_node = acpi_ns_get_parent_node(pci_device_node);
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}
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if (!pci_device_node) {
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/*
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* Get the PCI device and function numbers from the _ADR object
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* contained in the parent's scope.
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*/
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status =
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acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, parent_node,
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acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, pci_device_node,
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&pci_value);
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/*
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@ -327,6 +329,91 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_match_pci_root_bridge
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*
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* PARAMETERS: Id - The HID/CID in string format
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*
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* RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
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*
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* DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
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*
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******************************************************************************/
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static u8 acpi_ev_match_pci_root_bridge(char *id)
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{
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/*
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* Check if this is a PCI root.
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* ACPI 3.0+: check for a PCI Express root also.
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*/
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if (!(ACPI_STRNCMP(id,
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PCI_ROOT_HID_STRING,
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sizeof(PCI_ROOT_HID_STRING))) ||
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!(ACPI_STRNCMP(id,
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PCI_EXPRESS_ROOT_HID_STRING,
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sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_is_pci_root_bridge
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*
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* PARAMETERS: Node - Device node being examined
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*
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* RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
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*
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* DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
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* examining the _HID and _CID for the device.
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*
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******************************************************************************/
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static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
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{
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acpi_status status;
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struct acpi_device_id hid;
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struct acpi_compatible_id_list *cid;
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acpi_native_uint i;
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/*
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* Get the _HID and check for a PCI Root Bridge
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*/
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status = acpi_ut_execute_HID(node, &hid);
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if (ACPI_FAILURE(status)) {
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return (FALSE);
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}
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if (acpi_ev_match_pci_root_bridge(hid.value)) {
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return (TRUE);
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}
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/*
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* The _HID did not match.
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* Get the _CID and check for a PCI Root Bridge
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*/
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status = acpi_ut_execute_CID(node, &cid);
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if (ACPI_FAILURE(status)) {
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return (FALSE);
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}
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/* Check all _CIDs in the returned list */
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for (i = 0; i < cid->count; i++) {
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if (acpi_ev_match_pci_root_bridge(cid->id[i].value)) {
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ACPI_FREE(cid);
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return (TRUE);
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}
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}
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ACPI_FREE(cid);
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_pci_bar_region_setup
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