1a159c266SJung-uk Kim /******************************************************************************* 2a159c266SJung-uk Kim * 3a159c266SJung-uk Kim * Module Name: hwpci - Obtain PCI bus, device, and function numbers 4a159c266SJung-uk Kim * 5a159c266SJung-uk Kim ******************************************************************************/ 6a159c266SJung-uk Kim 70d84335fSJung-uk Kim /****************************************************************************** 80d84335fSJung-uk Kim * 90d84335fSJung-uk Kim * 1. Copyright Notice 100d84335fSJung-uk Kim * 11*804fe266SJung-uk Kim * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp. 12a159c266SJung-uk Kim * All rights reserved. 13a159c266SJung-uk Kim * 140d84335fSJung-uk Kim * 2. License 150d84335fSJung-uk Kim * 160d84335fSJung-uk Kim * 2.1. This is your license from Intel Corp. under its intellectual property 170d84335fSJung-uk Kim * rights. You may have additional license terms from the party that provided 180d84335fSJung-uk Kim * you this software, covering your right to use that party's intellectual 190d84335fSJung-uk Kim * property rights. 200d84335fSJung-uk Kim * 210d84335fSJung-uk Kim * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 220d84335fSJung-uk Kim * copy of the source code appearing in this file ("Covered Code") an 230d84335fSJung-uk Kim * irrevocable, perpetual, worldwide license under Intel's copyrights in the 240d84335fSJung-uk Kim * base code distributed originally by Intel ("Original Intel Code") to copy, 250d84335fSJung-uk Kim * make derivatives, distribute, use and display any portion of the Covered 260d84335fSJung-uk Kim * Code in any form, with the right to sublicense such rights; and 270d84335fSJung-uk Kim * 280d84335fSJung-uk Kim * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 290d84335fSJung-uk Kim * license (with the right to sublicense), under only those claims of Intel 300d84335fSJung-uk Kim * patents that are infringed by the Original Intel Code, to make, use, sell, 310d84335fSJung-uk Kim * offer to sell, and import the Covered Code and derivative works thereof 320d84335fSJung-uk Kim * solely to the minimum extent necessary to exercise the above copyright 330d84335fSJung-uk Kim * license, and in no event shall the patent license extend to any additions 340d84335fSJung-uk Kim * to or modifications of the Original Intel Code. No other license or right 350d84335fSJung-uk Kim * is granted directly or by implication, estoppel or otherwise; 360d84335fSJung-uk Kim * 370d84335fSJung-uk Kim * The above copyright and patent license is granted only if the following 380d84335fSJung-uk Kim * conditions are met: 390d84335fSJung-uk Kim * 400d84335fSJung-uk Kim * 3. Conditions 410d84335fSJung-uk Kim * 420d84335fSJung-uk Kim * 3.1. Redistribution of Source with Rights to Further Distribute Source. 430d84335fSJung-uk Kim * Redistribution of source code of any substantial portion of the Covered 440d84335fSJung-uk Kim * Code or modification with rights to further distribute source must include 450d84335fSJung-uk Kim * the above Copyright Notice, the above License, this list of Conditions, 460d84335fSJung-uk Kim * and the following Disclaimer and Export Compliance provision. In addition, 470d84335fSJung-uk Kim * Licensee must cause all Covered Code to which Licensee contributes to 480d84335fSJung-uk Kim * contain a file documenting the changes Licensee made to create that Covered 490d84335fSJung-uk Kim * Code and the date of any change. Licensee must include in that file the 500d84335fSJung-uk Kim * documentation of any changes made by any predecessor Licensee. Licensee 510d84335fSJung-uk Kim * must include a prominent statement that the modification is derived, 520d84335fSJung-uk Kim * directly or indirectly, from Original Intel Code. 530d84335fSJung-uk Kim * 540d84335fSJung-uk Kim * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 550d84335fSJung-uk Kim * Redistribution of source code of any substantial portion of the Covered 560d84335fSJung-uk Kim * Code or modification without rights to further distribute source must 570d84335fSJung-uk Kim * include the following Disclaimer and Export Compliance provision in the 580d84335fSJung-uk Kim * documentation and/or other materials provided with distribution. In 590d84335fSJung-uk Kim * addition, Licensee may not authorize further sublicense of source of any 600d84335fSJung-uk Kim * portion of the Covered Code, and must include terms to the effect that the 610d84335fSJung-uk Kim * license from Licensee to its licensee is limited to the intellectual 620d84335fSJung-uk Kim * property embodied in the software Licensee provides to its licensee, and 630d84335fSJung-uk Kim * not to intellectual property embodied in modifications its licensee may 640d84335fSJung-uk Kim * make. 650d84335fSJung-uk Kim * 660d84335fSJung-uk Kim * 3.3. Redistribution of Executable. Redistribution in executable form of any 670d84335fSJung-uk Kim * substantial portion of the Covered Code or modification must reproduce the 680d84335fSJung-uk Kim * above Copyright Notice, and the following Disclaimer and Export Compliance 690d84335fSJung-uk Kim * provision in the documentation and/or other materials provided with the 700d84335fSJung-uk Kim * distribution. 710d84335fSJung-uk Kim * 720d84335fSJung-uk Kim * 3.4. Intel retains all right, title, and interest in and to the Original 730d84335fSJung-uk Kim * Intel Code. 740d84335fSJung-uk Kim * 750d84335fSJung-uk Kim * 3.5. Neither the name Intel nor any other trademark owned or controlled by 760d84335fSJung-uk Kim * Intel shall be used in advertising or otherwise to promote the sale, use or 770d84335fSJung-uk Kim * other dealings in products derived from or relating to the Covered Code 780d84335fSJung-uk Kim * without prior written authorization from Intel. 790d84335fSJung-uk Kim * 800d84335fSJung-uk Kim * 4. Disclaimer and Export Compliance 810d84335fSJung-uk Kim * 820d84335fSJung-uk Kim * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 830d84335fSJung-uk Kim * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 840d84335fSJung-uk Kim * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 850d84335fSJung-uk Kim * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 860d84335fSJung-uk Kim * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 870d84335fSJung-uk Kim * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 880d84335fSJung-uk Kim * PARTICULAR PURPOSE. 890d84335fSJung-uk Kim * 900d84335fSJung-uk Kim * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 910d84335fSJung-uk Kim * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 920d84335fSJung-uk Kim * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 930d84335fSJung-uk Kim * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 940d84335fSJung-uk Kim * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 950d84335fSJung-uk Kim * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 960d84335fSJung-uk Kim * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 970d84335fSJung-uk Kim * LIMITED REMEDY. 980d84335fSJung-uk Kim * 990d84335fSJung-uk Kim * 4.3. Licensee shall not export, either directly or indirectly, any of this 1000d84335fSJung-uk Kim * software or system incorporating such software without first obtaining any 1010d84335fSJung-uk Kim * required license or other approval from the U. S. Department of Commerce or 1020d84335fSJung-uk Kim * any other agency or department of the United States Government. In the 1030d84335fSJung-uk Kim * event Licensee exports any such software from the United States or 1040d84335fSJung-uk Kim * re-exports any such software from a foreign destination, Licensee shall 1050d84335fSJung-uk Kim * ensure that the distribution and export/re-export of the software is in 1060d84335fSJung-uk Kim * compliance with all laws, regulations, orders, or other restrictions of the 1070d84335fSJung-uk Kim * U.S. Export Administration Regulations. Licensee agrees that neither it nor 1080d84335fSJung-uk Kim * any of its subsidiaries will export/re-export any technical data, process, 1090d84335fSJung-uk Kim * software, or service, directly or indirectly, to any country for which the 1100d84335fSJung-uk Kim * United States government or any agency thereof requires an export license, 1110d84335fSJung-uk Kim * other governmental approval, or letter of assurance, without first obtaining 1120d84335fSJung-uk Kim * such license, approval or letter. 1130d84335fSJung-uk Kim * 1140d84335fSJung-uk Kim ***************************************************************************** 1150d84335fSJung-uk Kim * 1160d84335fSJung-uk Kim * Alternatively, you may choose to be licensed under the terms of the 1170d84335fSJung-uk Kim * following license: 1180d84335fSJung-uk Kim * 119a159c266SJung-uk Kim * Redistribution and use in source and binary forms, with or without 120a159c266SJung-uk Kim * modification, are permitted provided that the following conditions 121a159c266SJung-uk Kim * are met: 122a159c266SJung-uk Kim * 1. Redistributions of source code must retain the above copyright 123a159c266SJung-uk Kim * notice, this list of conditions, and the following disclaimer, 124a159c266SJung-uk Kim * without modification. 125a159c266SJung-uk Kim * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126a159c266SJung-uk Kim * substantially similar to the "NO WARRANTY" disclaimer below 127a159c266SJung-uk Kim * ("Disclaimer") and any redistribution must be conditioned upon 128a159c266SJung-uk Kim * including a substantially similar Disclaimer requirement for further 129a159c266SJung-uk Kim * binary redistribution. 130a159c266SJung-uk Kim * 3. Neither the names of the above-listed copyright holders nor the names 131a159c266SJung-uk Kim * of any contributors may be used to endorse or promote products derived 132a159c266SJung-uk Kim * from this software without specific prior written permission. 133a159c266SJung-uk Kim * 1340d84335fSJung-uk Kim * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1350d84335fSJung-uk Kim * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1360d84335fSJung-uk Kim * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1370d84335fSJung-uk Kim * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 1380d84335fSJung-uk Kim * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 1390d84335fSJung-uk Kim * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 1400d84335fSJung-uk Kim * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 1410d84335fSJung-uk Kim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 1420d84335fSJung-uk Kim * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 1430d84335fSJung-uk Kim * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 1440d84335fSJung-uk Kim * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 1450d84335fSJung-uk Kim * 1460d84335fSJung-uk Kim * Alternatively, you may choose to be licensed under the terms of the 147a159c266SJung-uk Kim * GNU General Public License ("GPL") version 2 as published by the Free 148a159c266SJung-uk Kim * Software Foundation. 149a159c266SJung-uk Kim * 1500d84335fSJung-uk Kim *****************************************************************************/ 151a159c266SJung-uk Kim 152a159c266SJung-uk Kim #include <contrib/dev/acpica/include/acpi.h> 153a159c266SJung-uk Kim #include <contrib/dev/acpica/include/accommon.h> 154a159c266SJung-uk Kim 155a159c266SJung-uk Kim 156a159c266SJung-uk Kim #define _COMPONENT ACPI_NAMESPACE 157a159c266SJung-uk Kim ACPI_MODULE_NAME ("hwpci") 158a159c266SJung-uk Kim 159a159c266SJung-uk Kim 160a159c266SJung-uk Kim /* PCI configuration space values */ 161a159c266SJung-uk Kim 162a159c266SJung-uk Kim #define PCI_CFG_HEADER_TYPE_REG 0x0E 163a159c266SJung-uk Kim #define PCI_CFG_PRIMARY_BUS_NUMBER_REG 0x18 164a159c266SJung-uk Kim #define PCI_CFG_SECONDARY_BUS_NUMBER_REG 0x19 165a159c266SJung-uk Kim 166a159c266SJung-uk Kim /* PCI header values */ 167a159c266SJung-uk Kim 168a159c266SJung-uk Kim #define PCI_HEADER_TYPE_MASK 0x7F 169a159c266SJung-uk Kim #define PCI_TYPE_BRIDGE 0x01 170a159c266SJung-uk Kim #define PCI_TYPE_CARDBUS_BRIDGE 0x02 171a159c266SJung-uk Kim 172a159c266SJung-uk Kim typedef struct acpi_pci_device 173a159c266SJung-uk Kim { 174a159c266SJung-uk Kim ACPI_HANDLE Device; 175a159c266SJung-uk Kim struct acpi_pci_device *Next; 176a159c266SJung-uk Kim 177a159c266SJung-uk Kim } ACPI_PCI_DEVICE; 178a159c266SJung-uk Kim 179a159c266SJung-uk Kim 180a159c266SJung-uk Kim /* Local prototypes */ 181a159c266SJung-uk Kim 182a159c266SJung-uk Kim static ACPI_STATUS 183a159c266SJung-uk Kim AcpiHwBuildPciList ( 184a159c266SJung-uk Kim ACPI_HANDLE RootPciDevice, 185a159c266SJung-uk Kim ACPI_HANDLE PciRegion, 186a159c266SJung-uk Kim ACPI_PCI_DEVICE **ReturnListHead); 187a159c266SJung-uk Kim 188a159c266SJung-uk Kim static ACPI_STATUS 189a159c266SJung-uk Kim AcpiHwProcessPciList ( 190a159c266SJung-uk Kim ACPI_PCI_ID *PciId, 191a159c266SJung-uk Kim ACPI_PCI_DEVICE *ListHead); 192a159c266SJung-uk Kim 193a159c266SJung-uk Kim static void 194a159c266SJung-uk Kim AcpiHwDeletePciList ( 195a159c266SJung-uk Kim ACPI_PCI_DEVICE *ListHead); 196a159c266SJung-uk Kim 197a159c266SJung-uk Kim static ACPI_STATUS 198a159c266SJung-uk Kim AcpiHwGetPciDeviceInfo ( 199a159c266SJung-uk Kim ACPI_PCI_ID *PciId, 200a159c266SJung-uk Kim ACPI_HANDLE PciDevice, 201a159c266SJung-uk Kim UINT16 *BusNumber, 202a159c266SJung-uk Kim BOOLEAN *IsBridge); 203a159c266SJung-uk Kim 204a159c266SJung-uk Kim 205a159c266SJung-uk Kim /******************************************************************************* 206a159c266SJung-uk Kim * 207a159c266SJung-uk Kim * FUNCTION: AcpiHwDerivePciId 208a159c266SJung-uk Kim * 209a159c266SJung-uk Kim * PARAMETERS: PciId - Initial values for the PCI ID. May be 210a159c266SJung-uk Kim * modified by this function. 211a159c266SJung-uk Kim * RootPciDevice - A handle to a PCI device object. This 212a159c266SJung-uk Kim * object must be a PCI Root Bridge having a 213a159c266SJung-uk Kim * _HID value of either PNP0A03 or PNP0A08 214a159c266SJung-uk Kim * PciRegion - A handle to a PCI configuration space 215a159c266SJung-uk Kim * Operation Region being initialized 216a159c266SJung-uk Kim * 217a159c266SJung-uk Kim * RETURN: Status 218a159c266SJung-uk Kim * 219a159c266SJung-uk Kim * DESCRIPTION: This function derives a full PCI ID for a PCI device, 220a159c266SJung-uk Kim * consisting of a Segment number, Bus number, Device number, 221a159c266SJung-uk Kim * and function code. 222a159c266SJung-uk Kim * 223a159c266SJung-uk Kim * The PCI hardware dynamically configures PCI bus numbers 224a159c266SJung-uk Kim * depending on the bus topology discovered during system 225a159c266SJung-uk Kim * initialization. This function is invoked during configuration 226a159c266SJung-uk Kim * of a PCI_Config Operation Region in order to (possibly) update 227a159c266SJung-uk Kim * the Bus/Device/Function numbers in the PciId with the actual 228a159c266SJung-uk Kim * values as determined by the hardware and operating system 229a159c266SJung-uk Kim * configuration. 230a159c266SJung-uk Kim * 231a159c266SJung-uk Kim * The PciId parameter is initially populated during the Operation 232a159c266SJung-uk Kim * Region initialization. This function is then called, and is 233a159c266SJung-uk Kim * will make any necessary modifications to the Bus, Device, or 234a159c266SJung-uk Kim * Function number PCI ID subfields as appropriate for the 235a159c266SJung-uk Kim * current hardware and OS configuration. 236a159c266SJung-uk Kim * 237a159c266SJung-uk Kim * NOTE: Created 08/2010. Replaces the previous OSL AcpiOsDerivePciId 238a159c266SJung-uk Kim * interface since this feature is OS-independent. This module 239a159c266SJung-uk Kim * specifically avoids any use of recursion by building a local 240a159c266SJung-uk Kim * temporary device list. 241a159c266SJung-uk Kim * 242a159c266SJung-uk Kim ******************************************************************************/ 243a159c266SJung-uk Kim 244a159c266SJung-uk Kim ACPI_STATUS 245a159c266SJung-uk Kim AcpiHwDerivePciId ( 246a159c266SJung-uk Kim ACPI_PCI_ID *PciId, 247a159c266SJung-uk Kim ACPI_HANDLE RootPciDevice, 248a159c266SJung-uk Kim ACPI_HANDLE PciRegion) 249a159c266SJung-uk Kim { 250a159c266SJung-uk Kim ACPI_STATUS Status; 251a371a5fdSJung-uk Kim ACPI_PCI_DEVICE *ListHead; 252a159c266SJung-uk Kim 253a159c266SJung-uk Kim 254a159c266SJung-uk Kim ACPI_FUNCTION_TRACE (HwDerivePciId); 255a159c266SJung-uk Kim 256a159c266SJung-uk Kim 257a159c266SJung-uk Kim if (!PciId) 258a159c266SJung-uk Kim { 259a159c266SJung-uk Kim return_ACPI_STATUS (AE_BAD_PARAMETER); 260a159c266SJung-uk Kim } 261a159c266SJung-uk Kim 262a159c266SJung-uk Kim /* Build a list of PCI devices, from PciRegion up to RootPciDevice */ 263a159c266SJung-uk Kim 264a159c266SJung-uk Kim Status = AcpiHwBuildPciList (RootPciDevice, PciRegion, &ListHead); 265a159c266SJung-uk Kim if (ACPI_SUCCESS (Status)) 266a159c266SJung-uk Kim { 267a159c266SJung-uk Kim /* Walk the list, updating the PCI device/function/bus numbers */ 268a159c266SJung-uk Kim 269a159c266SJung-uk Kim Status = AcpiHwProcessPciList (PciId, ListHead); 270a159c266SJung-uk Kim 271313a0c13SJung-uk Kim /* Delete the list */ 272a159c266SJung-uk Kim 273a159c266SJung-uk Kim AcpiHwDeletePciList (ListHead); 274313a0c13SJung-uk Kim } 275313a0c13SJung-uk Kim 276a159c266SJung-uk Kim return_ACPI_STATUS (Status); 277a159c266SJung-uk Kim } 278a159c266SJung-uk Kim 279a159c266SJung-uk Kim 280a159c266SJung-uk Kim /******************************************************************************* 281a159c266SJung-uk Kim * 282a159c266SJung-uk Kim * FUNCTION: AcpiHwBuildPciList 283a159c266SJung-uk Kim * 284a159c266SJung-uk Kim * PARAMETERS: RootPciDevice - A handle to a PCI device object. This 285a159c266SJung-uk Kim * object is guaranteed to be a PCI Root 286a159c266SJung-uk Kim * Bridge having a _HID value of either 287a159c266SJung-uk Kim * PNP0A03 or PNP0A08 288a159c266SJung-uk Kim * PciRegion - A handle to the PCI configuration space 289a159c266SJung-uk Kim * Operation Region 290a159c266SJung-uk Kim * ReturnListHead - Where the PCI device list is returned 291a159c266SJung-uk Kim * 292a159c266SJung-uk Kim * RETURN: Status 293a159c266SJung-uk Kim * 294a159c266SJung-uk Kim * DESCRIPTION: Builds a list of devices from the input PCI region up to the 295a159c266SJung-uk Kim * Root PCI device for this namespace subtree. 296a159c266SJung-uk Kim * 297a159c266SJung-uk Kim ******************************************************************************/ 298a159c266SJung-uk Kim 299a159c266SJung-uk Kim static ACPI_STATUS 300a159c266SJung-uk Kim AcpiHwBuildPciList ( 301a159c266SJung-uk Kim ACPI_HANDLE RootPciDevice, 302a159c266SJung-uk Kim ACPI_HANDLE PciRegion, 303a159c266SJung-uk Kim ACPI_PCI_DEVICE **ReturnListHead) 304a159c266SJung-uk Kim { 305a159c266SJung-uk Kim ACPI_HANDLE CurrentDevice; 306a159c266SJung-uk Kim ACPI_HANDLE ParentDevice; 307a159c266SJung-uk Kim ACPI_STATUS Status; 308a159c266SJung-uk Kim ACPI_PCI_DEVICE *ListElement; 309a159c266SJung-uk Kim 310a159c266SJung-uk Kim 311a159c266SJung-uk Kim /* 312a159c266SJung-uk Kim * Ascend namespace branch until the RootPciDevice is reached, building 313a159c266SJung-uk Kim * a list of device nodes. Loop will exit when either the PCI device is 314a159c266SJung-uk Kim * found, or the root of the namespace is reached. 315a159c266SJung-uk Kim */ 316a371a5fdSJung-uk Kim *ReturnListHead = NULL; 317a159c266SJung-uk Kim CurrentDevice = PciRegion; 318a159c266SJung-uk Kim while (1) 319a159c266SJung-uk Kim { 320a159c266SJung-uk Kim Status = AcpiGetParent (CurrentDevice, &ParentDevice); 321a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 322a159c266SJung-uk Kim { 323313a0c13SJung-uk Kim /* Must delete the list before exit */ 324313a0c13SJung-uk Kim 325313a0c13SJung-uk Kim AcpiHwDeletePciList (*ReturnListHead); 326a159c266SJung-uk Kim return (Status); 327a159c266SJung-uk Kim } 328a159c266SJung-uk Kim 329a159c266SJung-uk Kim /* Finished when we reach the PCI root device (PNP0A03 or PNP0A08) */ 330a159c266SJung-uk Kim 331a159c266SJung-uk Kim if (ParentDevice == RootPciDevice) 332a159c266SJung-uk Kim { 333a159c266SJung-uk Kim return (AE_OK); 334a159c266SJung-uk Kim } 335a159c266SJung-uk Kim 336a159c266SJung-uk Kim ListElement = ACPI_ALLOCATE (sizeof (ACPI_PCI_DEVICE)); 337a159c266SJung-uk Kim if (!ListElement) 338a159c266SJung-uk Kim { 339313a0c13SJung-uk Kim /* Must delete the list before exit */ 340313a0c13SJung-uk Kim 341313a0c13SJung-uk Kim AcpiHwDeletePciList (*ReturnListHead); 342a159c266SJung-uk Kim return (AE_NO_MEMORY); 343a159c266SJung-uk Kim } 344a159c266SJung-uk Kim 345a159c266SJung-uk Kim /* Put new element at the head of the list */ 346a159c266SJung-uk Kim 347a371a5fdSJung-uk Kim ListElement->Next = *ReturnListHead; 348a159c266SJung-uk Kim ListElement->Device = ParentDevice; 349a371a5fdSJung-uk Kim *ReturnListHead = ListElement; 350a159c266SJung-uk Kim 351a159c266SJung-uk Kim CurrentDevice = ParentDevice; 352a159c266SJung-uk Kim } 353a159c266SJung-uk Kim } 354a159c266SJung-uk Kim 355a159c266SJung-uk Kim 356a159c266SJung-uk Kim /******************************************************************************* 357a159c266SJung-uk Kim * 358a159c266SJung-uk Kim * FUNCTION: AcpiHwProcessPciList 359a159c266SJung-uk Kim * 360a159c266SJung-uk Kim * PARAMETERS: PciId - Initial values for the PCI ID. May be 361a159c266SJung-uk Kim * modified by this function. 362a159c266SJung-uk Kim * ListHead - Device list created by 363a159c266SJung-uk Kim * AcpiHwBuildPciList 364a159c266SJung-uk Kim * 365a159c266SJung-uk Kim * RETURN: Status 366a159c266SJung-uk Kim * 367a159c266SJung-uk Kim * DESCRIPTION: Walk downward through the PCI device list, getting the device 368a159c266SJung-uk Kim * info for each, via the PCI configuration space and updating 369a159c266SJung-uk Kim * the PCI ID as necessary. Deletes the list during traversal. 370a159c266SJung-uk Kim * 371a159c266SJung-uk Kim ******************************************************************************/ 372a159c266SJung-uk Kim 373a159c266SJung-uk Kim static ACPI_STATUS 374a159c266SJung-uk Kim AcpiHwProcessPciList ( 375a159c266SJung-uk Kim ACPI_PCI_ID *PciId, 376a159c266SJung-uk Kim ACPI_PCI_DEVICE *ListHead) 377a159c266SJung-uk Kim { 378a159c266SJung-uk Kim ACPI_STATUS Status = AE_OK; 379a159c266SJung-uk Kim ACPI_PCI_DEVICE *Info; 380a159c266SJung-uk Kim UINT16 BusNumber; 381a159c266SJung-uk Kim BOOLEAN IsBridge = TRUE; 382a159c266SJung-uk Kim 383a159c266SJung-uk Kim 384a159c266SJung-uk Kim ACPI_FUNCTION_NAME (HwProcessPciList); 385a159c266SJung-uk Kim 386a159c266SJung-uk Kim 387a159c266SJung-uk Kim ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 388a159c266SJung-uk Kim "Input PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X\n", 389a159c266SJung-uk Kim PciId->Segment, PciId->Bus, PciId->Device, PciId->Function)); 390a159c266SJung-uk Kim 391a159c266SJung-uk Kim BusNumber = PciId->Bus; 392a159c266SJung-uk Kim 393a159c266SJung-uk Kim /* 394a159c266SJung-uk Kim * Descend down the namespace tree, collecting PCI device, function, 395a159c266SJung-uk Kim * and bus numbers. BusNumber is only important for PCI bridges. 396a159c266SJung-uk Kim * Algorithm: As we descend the tree, use the last valid PCI device, 397a159c266SJung-uk Kim * function, and bus numbers that are discovered, and assign them 398a159c266SJung-uk Kim * to the PCI ID for the target device. 399a159c266SJung-uk Kim */ 400a159c266SJung-uk Kim Info = ListHead; 401a159c266SJung-uk Kim while (Info) 402a159c266SJung-uk Kim { 403a159c266SJung-uk Kim Status = AcpiHwGetPciDeviceInfo (PciId, Info->Device, 404a159c266SJung-uk Kim &BusNumber, &IsBridge); 405a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 406a159c266SJung-uk Kim { 4078ef1a331SJung-uk Kim return (Status); 408a159c266SJung-uk Kim } 409a159c266SJung-uk Kim 410a159c266SJung-uk Kim Info = Info->Next; 411a159c266SJung-uk Kim } 412a159c266SJung-uk Kim 413a159c266SJung-uk Kim ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 414a159c266SJung-uk Kim "Output PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X " 415a159c266SJung-uk Kim "Status %X BusNumber %X IsBridge %X\n", 416a159c266SJung-uk Kim PciId->Segment, PciId->Bus, PciId->Device, PciId->Function, 417a159c266SJung-uk Kim Status, BusNumber, IsBridge)); 418a159c266SJung-uk Kim 4198ef1a331SJung-uk Kim return (AE_OK); 420a159c266SJung-uk Kim } 421a159c266SJung-uk Kim 422a159c266SJung-uk Kim 423a159c266SJung-uk Kim /******************************************************************************* 424a159c266SJung-uk Kim * 425a159c266SJung-uk Kim * FUNCTION: AcpiHwDeletePciList 426a159c266SJung-uk Kim * 427a159c266SJung-uk Kim * PARAMETERS: ListHead - Device list created by 428a159c266SJung-uk Kim * AcpiHwBuildPciList 429a159c266SJung-uk Kim * 430a159c266SJung-uk Kim * RETURN: None 431a159c266SJung-uk Kim * 432a159c266SJung-uk Kim * DESCRIPTION: Free the entire PCI list. 433a159c266SJung-uk Kim * 434a159c266SJung-uk Kim ******************************************************************************/ 435a159c266SJung-uk Kim 436a159c266SJung-uk Kim static void 437a159c266SJung-uk Kim AcpiHwDeletePciList ( 438a159c266SJung-uk Kim ACPI_PCI_DEVICE *ListHead) 439a159c266SJung-uk Kim { 440a159c266SJung-uk Kim ACPI_PCI_DEVICE *Next; 441a159c266SJung-uk Kim ACPI_PCI_DEVICE *Previous; 442a159c266SJung-uk Kim 443a159c266SJung-uk Kim 444a159c266SJung-uk Kim Next = ListHead; 445a159c266SJung-uk Kim while (Next) 446a159c266SJung-uk Kim { 447a159c266SJung-uk Kim Previous = Next; 448a159c266SJung-uk Kim Next = Previous->Next; 449a159c266SJung-uk Kim ACPI_FREE (Previous); 450a159c266SJung-uk Kim } 451a159c266SJung-uk Kim } 452a159c266SJung-uk Kim 453a159c266SJung-uk Kim 454a159c266SJung-uk Kim /******************************************************************************* 455a159c266SJung-uk Kim * 456a159c266SJung-uk Kim * FUNCTION: AcpiHwGetPciDeviceInfo 457a159c266SJung-uk Kim * 458a159c266SJung-uk Kim * PARAMETERS: PciId - Initial values for the PCI ID. May be 459a159c266SJung-uk Kim * modified by this function. 460a159c266SJung-uk Kim * PciDevice - Handle for the PCI device object 461a159c266SJung-uk Kim * BusNumber - Where a PCI bridge bus number is returned 462a159c266SJung-uk Kim * IsBridge - Return value, indicates if this PCI 463a159c266SJung-uk Kim * device is a PCI bridge 464a159c266SJung-uk Kim * 465a159c266SJung-uk Kim * RETURN: Status 466a159c266SJung-uk Kim * 467a159c266SJung-uk Kim * DESCRIPTION: Get the device info for a single PCI device object. Get the 468a159c266SJung-uk Kim * _ADR (contains PCI device and function numbers), and for PCI 469a159c266SJung-uk Kim * bridge devices, get the bus number from PCI configuration 470a159c266SJung-uk Kim * space. 471a159c266SJung-uk Kim * 472a159c266SJung-uk Kim ******************************************************************************/ 473a159c266SJung-uk Kim 474a159c266SJung-uk Kim static ACPI_STATUS 475a159c266SJung-uk Kim AcpiHwGetPciDeviceInfo ( 476a159c266SJung-uk Kim ACPI_PCI_ID *PciId, 477a159c266SJung-uk Kim ACPI_HANDLE PciDevice, 478a159c266SJung-uk Kim UINT16 *BusNumber, 479a159c266SJung-uk Kim BOOLEAN *IsBridge) 480a159c266SJung-uk Kim { 481a159c266SJung-uk Kim ACPI_STATUS Status; 482a159c266SJung-uk Kim ACPI_OBJECT_TYPE ObjectType; 483a159c266SJung-uk Kim UINT64 ReturnValue; 484a159c266SJung-uk Kim UINT64 PciValue; 485a159c266SJung-uk Kim 486a159c266SJung-uk Kim 487a159c266SJung-uk Kim /* We only care about objects of type Device */ 488a159c266SJung-uk Kim 489a159c266SJung-uk Kim Status = AcpiGetType (PciDevice, &ObjectType); 490a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 491a159c266SJung-uk Kim { 492a159c266SJung-uk Kim return (Status); 493a159c266SJung-uk Kim } 494a159c266SJung-uk Kim 495a159c266SJung-uk Kim if (ObjectType != ACPI_TYPE_DEVICE) 496a159c266SJung-uk Kim { 497a159c266SJung-uk Kim return (AE_OK); 498a159c266SJung-uk Kim } 499a159c266SJung-uk Kim 500a159c266SJung-uk Kim /* We need an _ADR. Ignore device if not present */ 501a159c266SJung-uk Kim 502a159c266SJung-uk Kim Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 503a159c266SJung-uk Kim PciDevice, &ReturnValue); 504a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 505a159c266SJung-uk Kim { 506a159c266SJung-uk Kim return (AE_OK); 507a159c266SJung-uk Kim } 508a159c266SJung-uk Kim 509a159c266SJung-uk Kim /* 510a159c266SJung-uk Kim * From _ADR, get the PCI Device and Function and 511a159c266SJung-uk Kim * update the PCI ID. 512a159c266SJung-uk Kim */ 513a159c266SJung-uk Kim PciId->Device = ACPI_HIWORD (ACPI_LODWORD (ReturnValue)); 514a159c266SJung-uk Kim PciId->Function = ACPI_LOWORD (ACPI_LODWORD (ReturnValue)); 515a159c266SJung-uk Kim 516a159c266SJung-uk Kim /* 517a159c266SJung-uk Kim * If the previous device was a bridge, use the previous 518a159c266SJung-uk Kim * device bus number 519a159c266SJung-uk Kim */ 520a159c266SJung-uk Kim if (*IsBridge) 521a159c266SJung-uk Kim { 522a159c266SJung-uk Kim PciId->Bus = *BusNumber; 523a159c266SJung-uk Kim } 524a159c266SJung-uk Kim 525a159c266SJung-uk Kim /* 526a159c266SJung-uk Kim * Get the bus numbers from PCI Config space: 527a159c266SJung-uk Kim * 528a159c266SJung-uk Kim * First, get the PCI HeaderType 529a159c266SJung-uk Kim */ 530a159c266SJung-uk Kim *IsBridge = FALSE; 531a159c266SJung-uk Kim Status = AcpiOsReadPciConfiguration (PciId, 532a159c266SJung-uk Kim PCI_CFG_HEADER_TYPE_REG, &PciValue, 8); 533a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 534a159c266SJung-uk Kim { 535a159c266SJung-uk Kim return (Status); 536a159c266SJung-uk Kim } 537a159c266SJung-uk Kim 538a159c266SJung-uk Kim /* We only care about bridges (1=PciBridge, 2=CardBusBridge) */ 539a159c266SJung-uk Kim 540a159c266SJung-uk Kim PciValue &= PCI_HEADER_TYPE_MASK; 541a159c266SJung-uk Kim 542a159c266SJung-uk Kim if ((PciValue != PCI_TYPE_BRIDGE) && 543a159c266SJung-uk Kim (PciValue != PCI_TYPE_CARDBUS_BRIDGE)) 544a159c266SJung-uk Kim { 545a159c266SJung-uk Kim return (AE_OK); 546a159c266SJung-uk Kim } 547a159c266SJung-uk Kim 548a159c266SJung-uk Kim /* Bridge: Get the Primary BusNumber */ 549a159c266SJung-uk Kim 550a159c266SJung-uk Kim Status = AcpiOsReadPciConfiguration (PciId, 551a159c266SJung-uk Kim PCI_CFG_PRIMARY_BUS_NUMBER_REG, &PciValue, 8); 552a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 553a159c266SJung-uk Kim { 554a159c266SJung-uk Kim return (Status); 555a159c266SJung-uk Kim } 556a159c266SJung-uk Kim 557a159c266SJung-uk Kim *IsBridge = TRUE; 558a159c266SJung-uk Kim PciId->Bus = (UINT16) PciValue; 559a159c266SJung-uk Kim 560a159c266SJung-uk Kim /* Bridge: Get the Secondary BusNumber */ 561a159c266SJung-uk Kim 562a159c266SJung-uk Kim Status = AcpiOsReadPciConfiguration (PciId, 563a159c266SJung-uk Kim PCI_CFG_SECONDARY_BUS_NUMBER_REG, &PciValue, 8); 564a159c266SJung-uk Kim if (ACPI_FAILURE (Status)) 565a159c266SJung-uk Kim { 566a159c266SJung-uk Kim return (Status); 567a159c266SJung-uk Kim } 568a159c266SJung-uk Kim 569a159c266SJung-uk Kim *BusNumber = (UINT16) PciValue; 570a159c266SJung-uk Kim return (AE_OK); 571a159c266SJung-uk Kim } 572