+++ /dev/null
-/*******************************************************************************
- *
- * Module Name: hwpci - Obtain PCI bus, device, and function numbers
- *
- ******************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2017, 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.h"
-#include "accommon.h"
-
-
-#define _COMPONENT ACPI_NAMESPACE
- ACPI_MODULE_NAME ("hwpci")
-
-
-/* PCI configuration space values */
-
-#define PCI_CFG_HEADER_TYPE_REG 0x0E
-#define PCI_CFG_PRIMARY_BUS_NUMBER_REG 0x18
-#define PCI_CFG_SECONDARY_BUS_NUMBER_REG 0x19
-
-/* PCI header values */
-
-#define PCI_HEADER_TYPE_MASK 0x7F
-#define PCI_TYPE_BRIDGE 0x01
-#define PCI_TYPE_CARDBUS_BRIDGE 0x02
-
-typedef struct acpi_pci_device
-{
- ACPI_HANDLE Device;
- struct acpi_pci_device *Next;
-
-} ACPI_PCI_DEVICE;
-
-
-/* Local prototypes */
-
-static ACPI_STATUS
-AcpiHwBuildPciList (
- ACPI_HANDLE RootPciDevice,
- ACPI_HANDLE PciRegion,
- ACPI_PCI_DEVICE **ReturnListHead);
-
-static ACPI_STATUS
-AcpiHwProcessPciList (
- ACPI_PCI_ID *PciId,
- ACPI_PCI_DEVICE *ListHead);
-
-static void
-AcpiHwDeletePciList (
- ACPI_PCI_DEVICE *ListHead);
-
-static ACPI_STATUS
-AcpiHwGetPciDeviceInfo (
- ACPI_PCI_ID *PciId,
- ACPI_HANDLE PciDevice,
- UINT16 *BusNumber,
- BOOLEAN *IsBridge);
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiHwDerivePciId
- *
- * PARAMETERS: PciId - Initial values for the PCI ID. May be
- * modified by this function.
- * RootPciDevice - A handle to a PCI device object. This
- * object must be a PCI Root Bridge having a
- * _HID value of either PNP0A03 or PNP0A08
- * PciRegion - A handle to a PCI configuration space
- * Operation Region being initialized
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function derives a full PCI ID for a PCI device,
- * consisting of a Segment number, Bus number, Device number,
- * and function code.
- *
- * The PCI hardware dynamically configures PCI bus numbers
- * depending on the bus topology discovered during system
- * initialization. This function is invoked during configuration
- * of a PCI_Config Operation Region in order to (possibly) update
- * the Bus/Device/Function numbers in the PciId with the actual
- * values as determined by the hardware and operating system
- * configuration.
- *
- * The PciId parameter is initially populated during the Operation
- * Region initialization. This function is then called, and is
- * will make any necessary modifications to the Bus, Device, or
- * Function number PCI ID subfields as appropriate for the
- * current hardware and OS configuration.
- *
- * NOTE: Created 08/2010. Replaces the previous OSL AcpiOsDerivePciId
- * interface since this feature is OS-independent. This module
- * specifically avoids any use of recursion by building a local
- * temporary device list.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiHwDerivePciId (
- ACPI_PCI_ID *PciId,
- ACPI_HANDLE RootPciDevice,
- ACPI_HANDLE PciRegion)
-{
- ACPI_STATUS Status;
- ACPI_PCI_DEVICE *ListHead;
-
-
- ACPI_FUNCTION_TRACE (HwDerivePciId);
-
-
- if (!PciId)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /* Build a list of PCI devices, from PciRegion up to RootPciDevice */
-
- Status = AcpiHwBuildPciList (RootPciDevice, PciRegion, &ListHead);
- if (ACPI_SUCCESS (Status))
- {
- /* Walk the list, updating the PCI device/function/bus numbers */
-
- Status = AcpiHwProcessPciList (PciId, ListHead);
-
- /* Delete the list */
-
- AcpiHwDeletePciList (ListHead);
- }
-
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiHwBuildPciList
- *
- * PARAMETERS: RootPciDevice - A handle to a PCI device object. This
- * object is guaranteed to be a PCI Root
- * Bridge having a _HID value of either
- * PNP0A03 or PNP0A08
- * PciRegion - A handle to the PCI configuration space
- * Operation Region
- * ReturnListHead - Where the PCI device list is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Builds a list of devices from the input PCI region up to the
- * Root PCI device for this namespace subtree.
- *
- ******************************************************************************/
-
-static ACPI_STATUS
-AcpiHwBuildPciList (
- ACPI_HANDLE RootPciDevice,
- ACPI_HANDLE PciRegion,
- ACPI_PCI_DEVICE **ReturnListHead)
-{
- ACPI_HANDLE CurrentDevice;
- ACPI_HANDLE ParentDevice;
- ACPI_STATUS Status;
- ACPI_PCI_DEVICE *ListElement;
-
-
- /*
- * Ascend namespace branch until the RootPciDevice is reached, building
- * a list of device nodes. Loop will exit when either the PCI device is
- * found, or the root of the namespace is reached.
- */
- *ReturnListHead = NULL;
- CurrentDevice = PciRegion;
- while (1)
- {
- Status = AcpiGetParent (CurrentDevice, &ParentDevice);
- if (ACPI_FAILURE (Status))
- {
- /* Must delete the list before exit */
-
- AcpiHwDeletePciList (*ReturnListHead);
- return (Status);
- }
-
- /* Finished when we reach the PCI root device (PNP0A03 or PNP0A08) */
-
- if (ParentDevice == RootPciDevice)
- {
- return (AE_OK);
- }
-
- ListElement = ACPI_ALLOCATE (sizeof (ACPI_PCI_DEVICE));
- if (!ListElement)
- {
- /* Must delete the list before exit */
-
- AcpiHwDeletePciList (*ReturnListHead);
- return (AE_NO_MEMORY);
- }
-
- /* Put new element at the head of the list */
-
- ListElement->Next = *ReturnListHead;
- ListElement->Device = ParentDevice;
- *ReturnListHead = ListElement;
-
- CurrentDevice = ParentDevice;
- }
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiHwProcessPciList
- *
- * PARAMETERS: PciId - Initial values for the PCI ID. May be
- * modified by this function.
- * ListHead - Device list created by
- * AcpiHwBuildPciList
- *
- * RETURN: Status
- *
- * DESCRIPTION: Walk downward through the PCI device list, getting the device
- * info for each, via the PCI configuration space and updating
- * the PCI ID as necessary. Deletes the list during traversal.
- *
- ******************************************************************************/
-
-static ACPI_STATUS
-AcpiHwProcessPciList (
- ACPI_PCI_ID *PciId,
- ACPI_PCI_DEVICE *ListHead)
-{
- ACPI_STATUS Status = AE_OK;
- ACPI_PCI_DEVICE *Info;
- UINT16 BusNumber;
- BOOLEAN IsBridge = TRUE;
-
-
- ACPI_FUNCTION_NAME (HwProcessPciList);
-
-
- ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
- "Input PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X\n",
- PciId->Segment, PciId->Bus, PciId->Device, PciId->Function));
-
- BusNumber = PciId->Bus;
-
- /*
- * Descend down the namespace tree, collecting PCI device, function,
- * and bus numbers. BusNumber is only important for PCI bridges.
- * Algorithm: As we descend the tree, use the last valid PCI device,
- * function, and bus numbers that are discovered, and assign them
- * to the PCI ID for the target device.
- */
- Info = ListHead;
- while (Info)
- {
- Status = AcpiHwGetPciDeviceInfo (PciId, Info->Device,
- &BusNumber, &IsBridge);
- if (ACPI_FAILURE (Status))
- {
- return (Status);
- }
-
- Info = Info->Next;
- }
-
- ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
- "Output PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X "
- "Status %X BusNumber %X IsBridge %X\n",
- PciId->Segment, PciId->Bus, PciId->Device, PciId->Function,
- Status, BusNumber, IsBridge));
-
- return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiHwDeletePciList
- *
- * PARAMETERS: ListHead - Device list created by
- * AcpiHwBuildPciList
- *
- * RETURN: None
- *
- * DESCRIPTION: Free the entire PCI list.
- *
- ******************************************************************************/
-
-static void
-AcpiHwDeletePciList (
- ACPI_PCI_DEVICE *ListHead)
-{
- ACPI_PCI_DEVICE *Next;
- ACPI_PCI_DEVICE *Previous;
-
-
- Next = ListHead;
- while (Next)
- {
- Previous = Next;
- Next = Previous->Next;
- ACPI_FREE (Previous);
- }
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiHwGetPciDeviceInfo
- *
- * PARAMETERS: PciId - Initial values for the PCI ID. May be
- * modified by this function.
- * PciDevice - Handle for the PCI device object
- * BusNumber - Where a PCI bridge bus number is returned
- * IsBridge - Return value, indicates if this PCI
- * device is a PCI bridge
- *
- * RETURN: Status
- *
- * DESCRIPTION: Get the device info for a single PCI device object. Get the
- * _ADR (contains PCI device and function numbers), and for PCI
- * bridge devices, get the bus number from PCI configuration
- * space.
- *
- ******************************************************************************/
-
-static ACPI_STATUS
-AcpiHwGetPciDeviceInfo (
- ACPI_PCI_ID *PciId,
- ACPI_HANDLE PciDevice,
- UINT16 *BusNumber,
- BOOLEAN *IsBridge)
-{
- ACPI_STATUS Status;
- ACPI_OBJECT_TYPE ObjectType;
- UINT64 ReturnValue;
- UINT64 PciValue;
-
-
- /* We only care about objects of type Device */
-
- Status = AcpiGetType (PciDevice, &ObjectType);
- if (ACPI_FAILURE (Status))
- {
- return (Status);
- }
-
- if (ObjectType != ACPI_TYPE_DEVICE)
- {
- return (AE_OK);
- }
-
- /* We need an _ADR. Ignore device if not present */
-
- Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
- PciDevice, &ReturnValue);
- if (ACPI_FAILURE (Status))
- {
- return (AE_OK);
- }
-
- /*
- * From _ADR, get the PCI Device and Function and
- * update the PCI ID.
- */
- PciId->Device = ACPI_HIWORD (ACPI_LODWORD (ReturnValue));
- PciId->Function = ACPI_LOWORD (ACPI_LODWORD (ReturnValue));
-
- /*
- * If the previous device was a bridge, use the previous
- * device bus number
- */
- if (*IsBridge)
- {
- PciId->Bus = *BusNumber;
- }
-
- /*
- * Get the bus numbers from PCI Config space:
- *
- * First, get the PCI HeaderType
- */
- *IsBridge = FALSE;
- Status = AcpiOsReadPciConfiguration (PciId,
- PCI_CFG_HEADER_TYPE_REG, &PciValue, 8);
- if (ACPI_FAILURE (Status))
- {
- return (Status);
- }
-
- /* We only care about bridges (1=PciBridge, 2=CardBusBridge) */
-
- PciValue &= PCI_HEADER_TYPE_MASK;
-
- if ((PciValue != PCI_TYPE_BRIDGE) &&
- (PciValue != PCI_TYPE_CARDBUS_BRIDGE))
- {
- return (AE_OK);
- }
-
- /* Bridge: Get the Primary BusNumber */
-
- Status = AcpiOsReadPciConfiguration (PciId,
- PCI_CFG_PRIMARY_BUS_NUMBER_REG, &PciValue, 8);
- if (ACPI_FAILURE (Status))
- {
- return (Status);
- }
-
- *IsBridge = TRUE;
- PciId->Bus = (UINT16) PciValue;
-
- /* Bridge: Get the Secondary BusNumber */
-
- Status = AcpiOsReadPciConfiguration (PciId,
- PCI_CFG_SECONDARY_BUS_NUMBER_REG, &PciValue, 8);
- if (ACPI_FAILURE (Status))
- {
- return (Status);
- }
-
- *BusNumber = (UINT16) PciValue;
- return (AE_OK);
-}
projects / reactos.git / blobdiff