Example #1
0
static ACPI_STATUS
AcpiNsInitOneDevice (
    ACPI_HANDLE             ObjHandle,
    UINT32                  NestingLevel,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_DEVICE_WALK_INFO   *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
    ACPI_EVALUATE_INFO      *Info = WalkInfo->EvaluateInfo;
    UINT32                  Flags;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *DeviceNode;


    ACPI_FUNCTION_TRACE (NsInitOneDevice);


    /* We are interested in Devices, Processors and ThermalZones only */

    DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
    if ((DeviceNode->Type != ACPI_TYPE_DEVICE)    &&
        (DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
        (DeviceNode->Type != ACPI_TYPE_THERMAL))
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Because of an earlier namespace analysis, all subtrees that contain an
     * _INI method are tagged.
     *
     * If this device subtree does not contain any _INI methods, we
     * can exit now and stop traversing this entire subtree.
     */
    if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
    {
        return_ACPI_STATUS (AE_CTRL_DEPTH);
    }

    /*
     * Run _STA to determine if this device is present and functioning. We
     * must know this information for two important reasons (from ACPI spec):
     *
     * 1) We can only run _INI if the device is present.
     * 2) We must abort the device tree walk on this subtree if the device is
     *    not present and is not functional (we will not examine the children)
     *
     * The _STA method is not required to be present under the device, we
     * assume the device is present if _STA does not exist.
     */
    ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
        ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));

    Status = AcpiUtExecute_STA (DeviceNode, &Flags);
    if (ACPI_FAILURE (Status))
    {
        /* Ignore error and move on to next device */

        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Flags == -1 means that _STA was not found. In this case, we assume that
     * the device is both present and functional.
     *
     * From the ACPI spec, description of _STA:
     *
     * "If a device object (including the processor object) does not have an
     * _STA object, then OSPM assumes that all of the above bits are set (in
     * other words, the device is present, ..., and functioning)"
     */
    if (Flags != ACPI_UINT32_MAX)
    {
        WalkInfo->Num_STA++;
    }

    /*
     * Examine the PRESENT and FUNCTIONING status bits
     *
     * Note: ACPI spec does not seem to specify behavior for the present but
     * not functioning case, so we assume functioning if present.
     */
    if (!(Flags & ACPI_STA_DEVICE_PRESENT))
    {
        /* Device is not present, we must examine the Functioning bit */

        if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
        {
            /*
             * Device is not present but is "functioning". In this case,
             * we will not run _INI, but we continue to examine the children
             * of this device.
             *
             * From the ACPI spec, description of _STA: (Note - no mention
             * of whether to run _INI or not on the device in question)
             *
             * "_STA may return bit 0 clear (not present) with bit 3 set
             * (device is functional). This case is used to indicate a valid
             * device for which no device driver should be loaded (for example,
             * a bridge device.) Children of this device may be present and
             * valid. OSPM should continue enumeration below a device whose
             * _STA returns this bit combination"
             */
            return_ACPI_STATUS (AE_OK);
        }
        else
        {
            /*
             * Device is not present and is not functioning. We must abort the
             * walk of this subtree immediately -- don't look at the children
             * of such a device.
             *
             * From the ACPI spec, description of _INI:
             *
             * "If the _STA method indicates that the device is not present,
             * OSPM will not run the _INI and will not examine the children
             * of the device for _INI methods"
             */
            return_ACPI_STATUS (AE_CTRL_DEPTH);
        }
    }

    /*
     * The device is present or is assumed present if no _STA exists.
     * Run the _INI if it exists (not required to exist)
     *
     * Note: We know there is an _INI within this subtree, but it may not be
     * under this particular device, it may be lower in the branch.
     */
    ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
        ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));

    ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
    Info->PrefixNode = DeviceNode;
    Info->RelativePathname = METHOD_NAME__INI;
    Info->Parameters = NULL;
    Info->Flags = ACPI_IGNORE_RETURN_VALUE;

    Status = AcpiNsEvaluate (Info);
    if (ACPI_SUCCESS (Status))
    {
        WalkInfo->Num_INI++;
    }

#ifdef ACPI_DEBUG_OUTPUT
    else if (Status != AE_NOT_FOUND)
    {
        /* Ignore error and move on to next device */

        char *ScopeName = AcpiNsGetExternalPathname (Info->Node);

        ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
            ScopeName));
        ACPI_FREE (ScopeName);
    }
#endif

    /* Ignore errors from above */

    Status = AE_OK;

    /*
     * The _INI method has been run if present; call the Global Initialization
     * Handler for this device.
     */
    if (AcpiGbl_InitHandler)
    {
        Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
    }

    return_ACPI_STATUS (Status);
}
Example #2
0
static ACPI_STATUS
AcpiNsGetDeviceCallback (
    ACPI_HANDLE             ObjHandle,
    UINT32                  NestingLevel,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_GET_DEVICES_INFO   *Info = Context;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    UINT32                  Flags;
    ACPI_PNP_DEVICE_ID      *Hid;
    ACPI_PNP_DEVICE_ID_LIST *Cid;
    UINT32                  i;
    BOOLEAN                 Found;
    int                     NoMatch;


    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Node = AcpiNsValidateHandle (ObjHandle);
    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    if (!Node)
    {
        return (AE_BAD_PARAMETER);
    }

    /*
     * First, filter based on the device HID and CID.
     *
     * 01/2010: For this case where a specific HID is requested, we don't
     * want to run _STA until we have an actual HID match. Thus, we will
     * not unnecessarily execute _STA on devices for which the caller
     * doesn't care about. Previously, _STA was executed unconditionally
     * on all devices found here.
     *
     * A side-effect of this change is that now we will continue to search
     * for a matching HID even under device trees where the parent device
     * would have returned a _STA that indicates it is not present or
     * not functioning (thus aborting the search on that branch).
     */
    if (Info->Hid != NULL)
    {
        Status = AcpiUtExecute_HID (Node, &Hid);
        if (Status == AE_NOT_FOUND)
        {
            return (AE_OK);
        }
        else if (ACPI_FAILURE (Status))
        {
            return (AE_CTRL_DEPTH);
        }

        NoMatch = strcmp (Hid->String, Info->Hid);
        ACPI_FREE (Hid);

        if (NoMatch)
        {
            /*
             * HID does not match, attempt match within the
             * list of Compatible IDs (CIDs)
             */
            Status = AcpiUtExecute_CID (Node, &Cid);
            if (Status == AE_NOT_FOUND)
            {
                return (AE_OK);
            }
            else if (ACPI_FAILURE (Status))
            {
                return (AE_CTRL_DEPTH);
            }

            /* Walk the CID list */

            Found = FALSE;
            for (i = 0; i < Cid->Count; i++)
            {
                if (strcmp (Cid->Ids[i].String, Info->Hid) == 0)
                {
                    /* Found a matching CID */

                    Found = TRUE;
                    break;
                }
            }

            ACPI_FREE (Cid);
            if (!Found)
            {
                return (AE_OK);
            }
        }
    }

    /* Run _STA to determine if device is present */

    Status = AcpiUtExecute_STA (Node, &Flags);
    if (ACPI_FAILURE (Status))
    {
        return (AE_CTRL_DEPTH);
    }

    if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
        !(Flags & ACPI_STA_DEVICE_FUNCTIONING))
    {
        /*
         * Don't examine the children of the device only when the
         * device is neither present nor functional. See ACPI spec,
         * description of _STA for more information.
         */
        return (AE_CTRL_DEPTH);
    }

    /* We have a valid device, invoke the user function */

    Status = Info->UserFunction (ObjHandle, NestingLevel,
        Info->Context, ReturnValue);
    return (Status);
}
Example #3
0
static ACPI_STATUS
AcpiNsGetDeviceCallback (
    ACPI_HANDLE             ObjHandle,
    UINT32                  NestingLevel,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_GET_DEVICES_INFO   *Info = Context;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    UINT32                  Flags;
    ACPI_DEVICE_ID          *Hid;
    ACPI_DEVICE_ID_LIST     *Cid;
    UINT32                  i;
    BOOLEAN                 Found;
    int                     NoMatch;


    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Node = AcpiNsValidateHandle (ObjHandle);
    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    if (!Node)
    {
        return (AE_BAD_PARAMETER);
    }

    /* Run _STA to determine if device is present */

    Status = AcpiUtExecute_STA (Node, &Flags);
    if (ACPI_FAILURE (Status))
    {
        return (AE_CTRL_DEPTH);
    }

    if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
        !(Flags & ACPI_STA_DEVICE_FUNCTIONING))
    {
        /*
         * Don't examine the children of the device only when the
         * device is neither present nor functional. See ACPI spec,
         * description of _STA for more information.
         */
        return (AE_CTRL_DEPTH);
    }

    /* Filter based on device HID & CID */

    if (Info->Hid != NULL)
    {
        Status = AcpiUtExecute_HID (Node, &Hid);
        if (Status == AE_NOT_FOUND)
        {
            return (AE_OK);
        }
        else if (ACPI_FAILURE (Status))
        {
            return (AE_CTRL_DEPTH);
        }

        NoMatch = ACPI_STRCMP (Hid->String, Info->Hid);
        ACPI_FREE (Hid);

        if (NoMatch)
        {
            /*
             * HID does not match, attempt match within the
             * list of Compatible IDs (CIDs)
             */
            Status = AcpiUtExecute_CID (Node, &Cid);
            if (Status == AE_NOT_FOUND)
            {
                return (AE_OK);
            }
            else if (ACPI_FAILURE (Status))
            {
                return (AE_CTRL_DEPTH);
            }

            /* Walk the CID list */

            Found = FALSE;
            for (i = 0; i < Cid->Count; i++)
            {
                if (ACPI_STRCMP (Cid->Ids[i].String, Info->Hid) == 0)
                {
                    /* Found a matching CID */

                    Found = TRUE;
                    break;
                }
            }

            ACPI_FREE (Cid);
            if (!Found)
            {
                return (AE_OK);
            }
        }
    }

    /* We have a valid device, invoke the user function */

    Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
                ReturnValue);
    return (Status);
}
Example #4
0
ACPI_STATUS
AcpiGetObjectInfo (
    ACPI_HANDLE             Handle,
    ACPI_BUFFER             *Buffer)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_DEVICE_INFO        *Info;
    ACPI_DEVICE_INFO        *ReturnInfo;
    ACPI_COMPATIBLE_ID_LIST *CidList = NULL;
    ACPI_SIZE               Size;


    /* Parameter validation */

    if (!Handle || !Buffer)
    {
        return (AE_BAD_PARAMETER);
    }

    Status = AcpiUtValidateBuffer (Buffer);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_INFO));
    if (!Info)
    {
        return (AE_NO_MEMORY);
    }

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    Node = AcpiNsMapHandleToNode (Handle);
    if (!Node)
    {
        (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
        goto Cleanup;
    }

    /* Init return structure */

    Size = sizeof (ACPI_DEVICE_INFO);

    Info->Type  = Node->Type;
    Info->Name  = Node->Name.Integer;
    Info->Valid = 0;

    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* If not a device, we are all done */

    if (Info->Type == ACPI_TYPE_DEVICE)
    {
        /*
         * Get extra info for ACPI Devices objects only:
         * Run the Device _HID, _UID, _CID, _STA, _ADR and _SxD methods.
         *
         * Note: none of these methods are required, so they may or may
         * not be present for this device.  The Info->Valid bitfield is used
         * to indicate which methods were found and ran successfully.
         */

        /* Execute the Device._HID method */

        Status = AcpiUtExecute_HID (Node, &Info->HardwareId);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_HID;
        }

        /* Execute the Device._UID method */

        Status = AcpiUtExecute_UID (Node, &Info->UniqueId);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_UID;
        }

        /* Execute the Device._CID method */

        Status = AcpiUtExecute_CID (Node, &CidList);
        if (ACPI_SUCCESS (Status))
        {
            Size += CidList->Size;
            Info->Valid |= ACPI_VALID_CID;
        }

        /* Execute the Device._STA method */

        Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_STA;
        }

        /* Execute the Device._ADR method */

        Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node,
                        &Info->Address);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_ADR;
        }

        /* Execute the Device._SxD methods */

        Status = AcpiUtExecute_Sxds (Node, Info->HighestDstates);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_SXDS;
        }
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, Size);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* Populate the return buffer */

    ReturnInfo = Buffer->Pointer;
    ACPI_MEMCPY (ReturnInfo, Info, sizeof (ACPI_DEVICE_INFO));

    if (CidList)
    {
        ACPI_MEMCPY (&ReturnInfo->CompatibilityId, CidList, CidList->Size);
    }


Cleanup:
    ACPI_FREE (Info);
    if (CidList)
    {
        ACPI_FREE (CidList);
    }
    return (Status);
}
Example #5
0
ACPI_STATUS
AcpiGetObjectInfo (
    ACPI_HANDLE             Handle,
    ACPI_DEVICE_INFO        *Info)
{
    ACPI_DEVICE_ID          Hid;
    ACPI_DEVICE_ID          Uid;
    ACPI_STATUS             Status;
    UINT32                  DeviceStatus = 0;
    ACPI_INTEGER            Address = 0;
    ACPI_NAMESPACE_NODE     *Node;


    /* Ensure that ACPI has been initialized */

    ACPI_IS_INITIALIZATION_COMPLETE (Status);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Parameter validation */

    if (!Handle || !Info)
    {
        return (AE_BAD_PARAMETER);
    }

    AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);

    Node = AcpiNsConvertHandleToEntry (Handle);
    if (!Node)
    {
        AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
        return (AE_BAD_PARAMETER);
    }

    Info->Type      = Node->Type;
    Info->Name      = Node->Name;

    AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);

    /*
     * If not a device, we are all done.
     */
    if (Info->Type != ACPI_TYPE_DEVICE)
    {
        return (AE_OK);
    }


    /*
     * Get extra info for ACPI devices only.  Run the
     * _HID, _UID, _STA, and _ADR methods.  Note: none
     * of these methods are required, so they may or may
     * not be present.  The Info->Valid bits are used
     * to indicate which methods ran successfully.
     */
    Info->Valid = 0;

    /* Execute the _HID method and save the result */

    Status = AcpiUtExecute_HID (Node, &Hid);
    if (ACPI_SUCCESS (Status))
    {
        STRNCPY (Info->HardwareId, Hid.Buffer, sizeof(Info->HardwareId));

        Info->Valid |= ACPI_VALID_HID;
    }

    /* Execute the _UID method and save the result */

    Status = AcpiUtExecute_UID (Node, &Uid);
    if (ACPI_SUCCESS (Status))
    {
        STRCPY (Info->UniqueId, Uid.Buffer);

        Info->Valid |= ACPI_VALID_UID;
    }

    /*
     * Execute the _STA method and save the result
     * _STA is not always present
     */
    Status = AcpiUtExecute_STA (Node, &DeviceStatus);
    if (ACPI_SUCCESS (Status))
    {
        Info->CurrentStatus = DeviceStatus;
        Info->Valid |= ACPI_VALID_STA;
    }

    /*
     * Execute the _ADR method and save result if successful
     * _ADR is not always present
     */
    Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
                                            Node, &Address);

    if (ACPI_SUCCESS (Status))
    {
        Info->Address = Address;
        Info->Valid |= ACPI_VALID_ADR;
    }

    return (AE_OK);
}
Example #6
0
static ACPI_STATUS
AcpiNsGetDeviceCallback (
    ACPI_HANDLE             ObjHandle,
    UINT32                  NestingLevel,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_GET_DEVICES_INFO   *Info = Context;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    UINT32                  Flags;
    ACPI_DEVICE_ID          Hid;
    ACPI_COMPATIBLE_ID_LIST *Cid;
    ACPI_NATIVE_UINT        i;


    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Node = AcpiNsMapHandleToNode (ObjHandle);
    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    if (!Node)
    {
        return (AE_BAD_PARAMETER);
    }

    /* Run _STA to determine if device is present */

    Status = AcpiUtExecute_STA (Node, &Flags);
    if (ACPI_FAILURE (Status))
    {
        return (AE_CTRL_DEPTH);
    }

    if (!(Flags & ACPI_STA_DEVICE_PRESENT))
    {
        /* Don't examine children of the device if not present */

        return (AE_CTRL_DEPTH);
    }

    /* Filter based on device HID & CID */

    if (Info->Hid != NULL)
    {
        Status = AcpiUtExecute_HID (Node, &Hid);
        if (Status == AE_NOT_FOUND)
        {
            return (AE_OK);
        }
        else if (ACPI_FAILURE (Status))
        {
            return (AE_CTRL_DEPTH);
        }

        if (ACPI_STRNCMP (Hid.Value, Info->Hid, sizeof (Hid.Value)) != 0)
        {
            /* Get the list of Compatible IDs */

            Status = AcpiUtExecute_CID (Node, &Cid);
            if (Status == AE_NOT_FOUND)
            {
                return (AE_OK);
            }
            else if (ACPI_FAILURE (Status))
            {
                return (AE_CTRL_DEPTH);
            }

            /* Walk the CID list */

            for (i = 0; i < Cid->Count; i++)
            {
                if (ACPI_STRNCMP (Cid->Id[i].Value, Info->Hid,
                                        sizeof (ACPI_COMPATIBLE_ID)) != 0)
                {
                    ACPI_FREE (Cid);
                    return (AE_OK);
                }
            }
            ACPI_FREE (Cid);
        }
    }

    Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
                ReturnValue);
    return (Status);
}