hwpci.c revision 1.1.1.1.2.2
1 1.1.1.1.2.2 bouyer /******************************************************************************* 2 1.1.1.1.2.2 bouyer * 3 1.1.1.1.2.2 bouyer * Module Name: hwpci - Obtain PCI bus, device, and function numbers 4 1.1.1.1.2.2 bouyer * 5 1.1.1.1.2.2 bouyer ******************************************************************************/ 6 1.1.1.1.2.2 bouyer 7 1.1.1.1.2.2 bouyer /* 8 1.1.1.1.2.2 bouyer * Copyright (C) 2000 - 2011, Intel Corp. 9 1.1.1.1.2.2 bouyer * All rights reserved. 10 1.1.1.1.2.2 bouyer * 11 1.1.1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 12 1.1.1.1.2.2 bouyer * modification, are permitted provided that the following conditions 13 1.1.1.1.2.2 bouyer * are met: 14 1.1.1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 15 1.1.1.1.2.2 bouyer * notice, this list of conditions, and the following disclaimer, 16 1.1.1.1.2.2 bouyer * without modification. 17 1.1.1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 1.1.1.1.2.2 bouyer * substantially similar to the "NO WARRANTY" disclaimer below 19 1.1.1.1.2.2 bouyer * ("Disclaimer") and any redistribution must be conditioned upon 20 1.1.1.1.2.2 bouyer * including a substantially similar Disclaimer requirement for further 21 1.1.1.1.2.2 bouyer * binary redistribution. 22 1.1.1.1.2.2 bouyer * 3. Neither the names of the above-listed copyright holders nor the names 23 1.1.1.1.2.2 bouyer * of any contributors may be used to endorse or promote products derived 24 1.1.1.1.2.2 bouyer * from this software without specific prior written permission. 25 1.1.1.1.2.2 bouyer * 26 1.1.1.1.2.2 bouyer * Alternatively, this software may be distributed under the terms of the 27 1.1.1.1.2.2 bouyer * GNU General Public License ("GPL") version 2 as published by the Free 28 1.1.1.1.2.2 bouyer * Software Foundation. 29 1.1.1.1.2.2 bouyer * 30 1.1.1.1.2.2 bouyer * NO WARRANTY 31 1.1.1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 1.1.1.1.2.2 bouyer * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 1.1.1.1.2.2 bouyer * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 1.1.1.1.2.2 bouyer * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 1.1.1.1.2.2 bouyer * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.1.1.1.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.1.1.1.2.2 bouyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.1.1.1.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 1.1.1.1.2.2 bouyer * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 1.1.1.1.2.2 bouyer * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 1.1.1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGES. 42 1.1.1.1.2.2 bouyer */ 43 1.1.1.1.2.2 bouyer 44 1.1.1.1.2.2 bouyer #define __HWPCI_C__ 45 1.1.1.1.2.2 bouyer 46 1.1.1.1.2.2 bouyer #include "acpi.h" 47 1.1.1.1.2.2 bouyer #include "accommon.h" 48 1.1.1.1.2.2 bouyer 49 1.1.1.1.2.2 bouyer 50 1.1.1.1.2.2 bouyer #define _COMPONENT ACPI_NAMESPACE 51 1.1.1.1.2.2 bouyer ACPI_MODULE_NAME ("hwpci") 52 1.1.1.1.2.2 bouyer 53 1.1.1.1.2.2 bouyer 54 1.1.1.1.2.2 bouyer /* PCI configuration space values */ 55 1.1.1.1.2.2 bouyer 56 1.1.1.1.2.2 bouyer #define PCI_CFG_HEADER_TYPE_REG 0x0E 57 1.1.1.1.2.2 bouyer #define PCI_CFG_PRIMARY_BUS_NUMBER_REG 0x18 58 1.1.1.1.2.2 bouyer #define PCI_CFG_SECONDARY_BUS_NUMBER_REG 0x19 59 1.1.1.1.2.2 bouyer 60 1.1.1.1.2.2 bouyer /* PCI header values */ 61 1.1.1.1.2.2 bouyer 62 1.1.1.1.2.2 bouyer #define PCI_HEADER_TYPE_MASK 0x7F 63 1.1.1.1.2.2 bouyer #define PCI_TYPE_BRIDGE 0x01 64 1.1.1.1.2.2 bouyer #define PCI_TYPE_CARDBUS_BRIDGE 0x02 65 1.1.1.1.2.2 bouyer 66 1.1.1.1.2.2 bouyer typedef struct acpi_pci_device 67 1.1.1.1.2.2 bouyer { 68 1.1.1.1.2.2 bouyer ACPI_HANDLE Device; 69 1.1.1.1.2.2 bouyer struct acpi_pci_device *Next; 70 1.1.1.1.2.2 bouyer 71 1.1.1.1.2.2 bouyer } ACPI_PCI_DEVICE; 72 1.1.1.1.2.2 bouyer 73 1.1.1.1.2.2 bouyer 74 1.1.1.1.2.2 bouyer /* Local prototypes */ 75 1.1.1.1.2.2 bouyer 76 1.1.1.1.2.2 bouyer static ACPI_STATUS 77 1.1.1.1.2.2 bouyer AcpiHwBuildPciList ( 78 1.1.1.1.2.2 bouyer ACPI_HANDLE RootPciDevice, 79 1.1.1.1.2.2 bouyer ACPI_HANDLE PciRegion, 80 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE **ReturnListHead); 81 1.1.1.1.2.2 bouyer 82 1.1.1.1.2.2 bouyer static ACPI_STATUS 83 1.1.1.1.2.2 bouyer AcpiHwProcessPciList ( 84 1.1.1.1.2.2 bouyer ACPI_PCI_ID *PciId, 85 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead); 86 1.1.1.1.2.2 bouyer 87 1.1.1.1.2.2 bouyer static void 88 1.1.1.1.2.2 bouyer AcpiHwDeletePciList ( 89 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead); 90 1.1.1.1.2.2 bouyer 91 1.1.1.1.2.2 bouyer static ACPI_STATUS 92 1.1.1.1.2.2 bouyer AcpiHwGetPciDeviceInfo ( 93 1.1.1.1.2.2 bouyer ACPI_PCI_ID *PciId, 94 1.1.1.1.2.2 bouyer ACPI_HANDLE PciDevice, 95 1.1.1.1.2.2 bouyer UINT16 *BusNumber, 96 1.1.1.1.2.2 bouyer BOOLEAN *IsBridge); 97 1.1.1.1.2.2 bouyer 98 1.1.1.1.2.2 bouyer 99 1.1.1.1.2.2 bouyer /******************************************************************************* 100 1.1.1.1.2.2 bouyer * 101 1.1.1.1.2.2 bouyer * FUNCTION: AcpiHwDerivePciId 102 1.1.1.1.2.2 bouyer * 103 1.1.1.1.2.2 bouyer * PARAMETERS: PciId - Initial values for the PCI ID. May be 104 1.1.1.1.2.2 bouyer * modified by this function. 105 1.1.1.1.2.2 bouyer * RootPciDevice - A handle to a PCI device object. This 106 1.1.1.1.2.2 bouyer * object must be a PCI Root Bridge having a 107 1.1.1.1.2.2 bouyer * _HID value of either PNP0A03 or PNP0A08 108 1.1.1.1.2.2 bouyer * PciRegion - A handle to a PCI configuration space 109 1.1.1.1.2.2 bouyer * Operation Region being initialized 110 1.1.1.1.2.2 bouyer * 111 1.1.1.1.2.2 bouyer * RETURN: Status 112 1.1.1.1.2.2 bouyer * 113 1.1.1.1.2.2 bouyer * DESCRIPTION: This function derives a full PCI ID for a PCI device, 114 1.1.1.1.2.2 bouyer * consisting of a Segment number, Bus number, Device number, 115 1.1.1.1.2.2 bouyer * and function code. 116 1.1.1.1.2.2 bouyer * 117 1.1.1.1.2.2 bouyer * The PCI hardware dynamically configures PCI bus numbers 118 1.1.1.1.2.2 bouyer * depending on the bus topology discovered during system 119 1.1.1.1.2.2 bouyer * initialization. This function is invoked during configuration 120 1.1.1.1.2.2 bouyer * of a PCI_Config Operation Region in order to (possibly) update 121 1.1.1.1.2.2 bouyer * the Bus/Device/Function numbers in the PciId with the actual 122 1.1.1.1.2.2 bouyer * values as determined by the hardware and operating system 123 1.1.1.1.2.2 bouyer * configuration. 124 1.1.1.1.2.2 bouyer * 125 1.1.1.1.2.2 bouyer * The PciId parameter is initially populated during the Operation 126 1.1.1.1.2.2 bouyer * Region initialization. This function is then called, and is 127 1.1.1.1.2.2 bouyer * will make any necessary modifications to the Bus, Device, or 128 1.1.1.1.2.2 bouyer * Function number PCI ID subfields as appropriate for the 129 1.1.1.1.2.2 bouyer * current hardware and OS configuration. 130 1.1.1.1.2.2 bouyer * 131 1.1.1.1.2.2 bouyer * NOTE: Created 08/2010. Replaces the previous OSL AcpiOsDerivePciId 132 1.1.1.1.2.2 bouyer * interface since this feature is OS-independent. This module 133 1.1.1.1.2.2 bouyer * specifically avoids any use of recursion by building a local 134 1.1.1.1.2.2 bouyer * temporary device list. 135 1.1.1.1.2.2 bouyer * 136 1.1.1.1.2.2 bouyer ******************************************************************************/ 137 1.1.1.1.2.2 bouyer 138 1.1.1.1.2.2 bouyer ACPI_STATUS 139 1.1.1.1.2.2 bouyer AcpiHwDerivePciId ( 140 1.1.1.1.2.2 bouyer ACPI_PCI_ID *PciId, 141 1.1.1.1.2.2 bouyer ACPI_HANDLE RootPciDevice, 142 1.1.1.1.2.2 bouyer ACPI_HANDLE PciRegion) 143 1.1.1.1.2.2 bouyer { 144 1.1.1.1.2.2 bouyer ACPI_STATUS Status; 145 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead = NULL; 146 1.1.1.1.2.2 bouyer 147 1.1.1.1.2.2 bouyer 148 1.1.1.1.2.2 bouyer ACPI_FUNCTION_TRACE (HwDerivePciId); 149 1.1.1.1.2.2 bouyer 150 1.1.1.1.2.2 bouyer 151 1.1.1.1.2.2 bouyer if (!PciId) 152 1.1.1.1.2.2 bouyer { 153 1.1.1.1.2.2 bouyer return_ACPI_STATUS (AE_BAD_PARAMETER); 154 1.1.1.1.2.2 bouyer } 155 1.1.1.1.2.2 bouyer 156 1.1.1.1.2.2 bouyer /* Build a list of PCI devices, from PciRegion up to RootPciDevice */ 157 1.1.1.1.2.2 bouyer 158 1.1.1.1.2.2 bouyer Status = AcpiHwBuildPciList (RootPciDevice, PciRegion, &ListHead); 159 1.1.1.1.2.2 bouyer if (ACPI_SUCCESS (Status)) 160 1.1.1.1.2.2 bouyer { 161 1.1.1.1.2.2 bouyer /* Walk the list, updating the PCI device/function/bus numbers */ 162 1.1.1.1.2.2 bouyer 163 1.1.1.1.2.2 bouyer Status = AcpiHwProcessPciList (PciId, ListHead); 164 1.1.1.1.2.2 bouyer } 165 1.1.1.1.2.2 bouyer 166 1.1.1.1.2.2 bouyer /* Always delete the list */ 167 1.1.1.1.2.2 bouyer 168 1.1.1.1.2.2 bouyer AcpiHwDeletePciList (ListHead); 169 1.1.1.1.2.2 bouyer return_ACPI_STATUS (Status); 170 1.1.1.1.2.2 bouyer } 171 1.1.1.1.2.2 bouyer 172 1.1.1.1.2.2 bouyer 173 1.1.1.1.2.2 bouyer /******************************************************************************* 174 1.1.1.1.2.2 bouyer * 175 1.1.1.1.2.2 bouyer * FUNCTION: AcpiHwBuildPciList 176 1.1.1.1.2.2 bouyer * 177 1.1.1.1.2.2 bouyer * PARAMETERS: RootPciDevice - A handle to a PCI device object. This 178 1.1.1.1.2.2 bouyer * object is guaranteed to be a PCI Root 179 1.1.1.1.2.2 bouyer * Bridge having a _HID value of either 180 1.1.1.1.2.2 bouyer * PNP0A03 or PNP0A08 181 1.1.1.1.2.2 bouyer * PciRegion - A handle to the PCI configuration space 182 1.1.1.1.2.2 bouyer * Operation Region 183 1.1.1.1.2.2 bouyer * ReturnListHead - Where the PCI device list is returned 184 1.1.1.1.2.2 bouyer * 185 1.1.1.1.2.2 bouyer * RETURN: Status 186 1.1.1.1.2.2 bouyer * 187 1.1.1.1.2.2 bouyer * DESCRIPTION: Builds a list of devices from the input PCI region up to the 188 1.1.1.1.2.2 bouyer * Root PCI device for this namespace subtree. 189 1.1.1.1.2.2 bouyer * 190 1.1.1.1.2.2 bouyer ******************************************************************************/ 191 1.1.1.1.2.2 bouyer 192 1.1.1.1.2.2 bouyer static ACPI_STATUS 193 1.1.1.1.2.2 bouyer AcpiHwBuildPciList ( 194 1.1.1.1.2.2 bouyer ACPI_HANDLE RootPciDevice, 195 1.1.1.1.2.2 bouyer ACPI_HANDLE PciRegion, 196 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE **ReturnListHead) 197 1.1.1.1.2.2 bouyer { 198 1.1.1.1.2.2 bouyer ACPI_HANDLE CurrentDevice; 199 1.1.1.1.2.2 bouyer ACPI_HANDLE ParentDevice; 200 1.1.1.1.2.2 bouyer ACPI_STATUS Status; 201 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListElement; 202 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead = NULL; 203 1.1.1.1.2.2 bouyer 204 1.1.1.1.2.2 bouyer 205 1.1.1.1.2.2 bouyer /* 206 1.1.1.1.2.2 bouyer * Ascend namespace branch until the RootPciDevice is reached, building 207 1.1.1.1.2.2 bouyer * a list of device nodes. Loop will exit when either the PCI device is 208 1.1.1.1.2.2 bouyer * found, or the root of the namespace is reached. 209 1.1.1.1.2.2 bouyer */ 210 1.1.1.1.2.2 bouyer CurrentDevice = PciRegion; 211 1.1.1.1.2.2 bouyer while (1) 212 1.1.1.1.2.2 bouyer { 213 1.1.1.1.2.2 bouyer Status = AcpiGetParent (CurrentDevice, &ParentDevice); 214 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 215 1.1.1.1.2.2 bouyer { 216 1.1.1.1.2.2 bouyer return (Status); 217 1.1.1.1.2.2 bouyer } 218 1.1.1.1.2.2 bouyer 219 1.1.1.1.2.2 bouyer /* Finished when we reach the PCI root device (PNP0A03 or PNP0A08) */ 220 1.1.1.1.2.2 bouyer 221 1.1.1.1.2.2 bouyer if (ParentDevice == RootPciDevice) 222 1.1.1.1.2.2 bouyer { 223 1.1.1.1.2.2 bouyer *ReturnListHead = ListHead; 224 1.1.1.1.2.2 bouyer return (AE_OK); 225 1.1.1.1.2.2 bouyer } 226 1.1.1.1.2.2 bouyer 227 1.1.1.1.2.2 bouyer ListElement = ACPI_ALLOCATE (sizeof (ACPI_PCI_DEVICE)); 228 1.1.1.1.2.2 bouyer if (!ListElement) 229 1.1.1.1.2.2 bouyer { 230 1.1.1.1.2.2 bouyer return (AE_NO_MEMORY); 231 1.1.1.1.2.2 bouyer } 232 1.1.1.1.2.2 bouyer 233 1.1.1.1.2.2 bouyer /* Put new element at the head of the list */ 234 1.1.1.1.2.2 bouyer 235 1.1.1.1.2.2 bouyer ListElement->Next = ListHead; 236 1.1.1.1.2.2 bouyer ListElement->Device = ParentDevice; 237 1.1.1.1.2.2 bouyer ListHead = ListElement; 238 1.1.1.1.2.2 bouyer 239 1.1.1.1.2.2 bouyer CurrentDevice = ParentDevice; 240 1.1.1.1.2.2 bouyer } 241 1.1.1.1.2.2 bouyer } 242 1.1.1.1.2.2 bouyer 243 1.1.1.1.2.2 bouyer 244 1.1.1.1.2.2 bouyer /******************************************************************************* 245 1.1.1.1.2.2 bouyer * 246 1.1.1.1.2.2 bouyer * FUNCTION: AcpiHwProcessPciList 247 1.1.1.1.2.2 bouyer * 248 1.1.1.1.2.2 bouyer * PARAMETERS: PciId - Initial values for the PCI ID. May be 249 1.1.1.1.2.2 bouyer * modified by this function. 250 1.1.1.1.2.2 bouyer * ListHead - Device list created by 251 1.1.1.1.2.2 bouyer * AcpiHwBuildPciList 252 1.1.1.1.2.2 bouyer * 253 1.1.1.1.2.2 bouyer * RETURN: Status 254 1.1.1.1.2.2 bouyer * 255 1.1.1.1.2.2 bouyer * DESCRIPTION: Walk downward through the PCI device list, getting the device 256 1.1.1.1.2.2 bouyer * info for each, via the PCI configuration space and updating 257 1.1.1.1.2.2 bouyer * the PCI ID as necessary. Deletes the list during traversal. 258 1.1.1.1.2.2 bouyer * 259 1.1.1.1.2.2 bouyer ******************************************************************************/ 260 1.1.1.1.2.2 bouyer 261 1.1.1.1.2.2 bouyer static ACPI_STATUS 262 1.1.1.1.2.2 bouyer AcpiHwProcessPciList ( 263 1.1.1.1.2.2 bouyer ACPI_PCI_ID *PciId, 264 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead) 265 1.1.1.1.2.2 bouyer { 266 1.1.1.1.2.2 bouyer ACPI_STATUS Status = AE_OK; 267 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *Info; 268 1.1.1.1.2.2 bouyer UINT16 BusNumber; 269 1.1.1.1.2.2 bouyer BOOLEAN IsBridge = TRUE; 270 1.1.1.1.2.2 bouyer 271 1.1.1.1.2.2 bouyer 272 1.1.1.1.2.2 bouyer ACPI_FUNCTION_NAME (HwProcessPciList); 273 1.1.1.1.2.2 bouyer 274 1.1.1.1.2.2 bouyer 275 1.1.1.1.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 276 1.1.1.1.2.2 bouyer "Input PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X\n", 277 1.1.1.1.2.2 bouyer PciId->Segment, PciId->Bus, PciId->Device, PciId->Function)); 278 1.1.1.1.2.2 bouyer 279 1.1.1.1.2.2 bouyer BusNumber = PciId->Bus; 280 1.1.1.1.2.2 bouyer 281 1.1.1.1.2.2 bouyer /* 282 1.1.1.1.2.2 bouyer * Descend down the namespace tree, collecting PCI device, function, 283 1.1.1.1.2.2 bouyer * and bus numbers. BusNumber is only important for PCI bridges. 284 1.1.1.1.2.2 bouyer * Algorithm: As we descend the tree, use the last valid PCI device, 285 1.1.1.1.2.2 bouyer * function, and bus numbers that are discovered, and assign them 286 1.1.1.1.2.2 bouyer * to the PCI ID for the target device. 287 1.1.1.1.2.2 bouyer */ 288 1.1.1.1.2.2 bouyer Info = ListHead; 289 1.1.1.1.2.2 bouyer while (Info) 290 1.1.1.1.2.2 bouyer { 291 1.1.1.1.2.2 bouyer Status = AcpiHwGetPciDeviceInfo (PciId, Info->Device, 292 1.1.1.1.2.2 bouyer &BusNumber, &IsBridge); 293 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 294 1.1.1.1.2.2 bouyer { 295 1.1.1.1.2.2 bouyer return_ACPI_STATUS (Status); 296 1.1.1.1.2.2 bouyer } 297 1.1.1.1.2.2 bouyer 298 1.1.1.1.2.2 bouyer Info = Info->Next; 299 1.1.1.1.2.2 bouyer } 300 1.1.1.1.2.2 bouyer 301 1.1.1.1.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 302 1.1.1.1.2.2 bouyer "Output PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X " 303 1.1.1.1.2.2 bouyer "Status %X BusNumber %X IsBridge %X\n", 304 1.1.1.1.2.2 bouyer PciId->Segment, PciId->Bus, PciId->Device, PciId->Function, 305 1.1.1.1.2.2 bouyer Status, BusNumber, IsBridge)); 306 1.1.1.1.2.2 bouyer 307 1.1.1.1.2.2 bouyer return_ACPI_STATUS (AE_OK); 308 1.1.1.1.2.2 bouyer } 309 1.1.1.1.2.2 bouyer 310 1.1.1.1.2.2 bouyer 311 1.1.1.1.2.2 bouyer /******************************************************************************* 312 1.1.1.1.2.2 bouyer * 313 1.1.1.1.2.2 bouyer * FUNCTION: AcpiHwDeletePciList 314 1.1.1.1.2.2 bouyer * 315 1.1.1.1.2.2 bouyer * PARAMETERS: ListHead - Device list created by 316 1.1.1.1.2.2 bouyer * AcpiHwBuildPciList 317 1.1.1.1.2.2 bouyer * 318 1.1.1.1.2.2 bouyer * RETURN: None 319 1.1.1.1.2.2 bouyer * 320 1.1.1.1.2.2 bouyer * DESCRIPTION: Free the entire PCI list. 321 1.1.1.1.2.2 bouyer * 322 1.1.1.1.2.2 bouyer ******************************************************************************/ 323 1.1.1.1.2.2 bouyer 324 1.1.1.1.2.2 bouyer static void 325 1.1.1.1.2.2 bouyer AcpiHwDeletePciList ( 326 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *ListHead) 327 1.1.1.1.2.2 bouyer { 328 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *Next; 329 1.1.1.1.2.2 bouyer ACPI_PCI_DEVICE *Previous; 330 1.1.1.1.2.2 bouyer 331 1.1.1.1.2.2 bouyer 332 1.1.1.1.2.2 bouyer Next = ListHead; 333 1.1.1.1.2.2 bouyer while (Next) 334 1.1.1.1.2.2 bouyer { 335 1.1.1.1.2.2 bouyer Previous = Next; 336 1.1.1.1.2.2 bouyer Next = Previous->Next; 337 1.1.1.1.2.2 bouyer ACPI_FREE (Previous); 338 1.1.1.1.2.2 bouyer } 339 1.1.1.1.2.2 bouyer } 340 1.1.1.1.2.2 bouyer 341 1.1.1.1.2.2 bouyer 342 1.1.1.1.2.2 bouyer /******************************************************************************* 343 1.1.1.1.2.2 bouyer * 344 1.1.1.1.2.2 bouyer * FUNCTION: AcpiHwGetPciDeviceInfo 345 1.1.1.1.2.2 bouyer * 346 1.1.1.1.2.2 bouyer * PARAMETERS: PciId - Initial values for the PCI ID. May be 347 1.1.1.1.2.2 bouyer * modified by this function. 348 1.1.1.1.2.2 bouyer * PciDevice - Handle for the PCI device object 349 1.1.1.1.2.2 bouyer * BusNumber - Where a PCI bridge bus number is returned 350 1.1.1.1.2.2 bouyer * IsBridge - Return value, indicates if this PCI 351 1.1.1.1.2.2 bouyer * device is a PCI bridge 352 1.1.1.1.2.2 bouyer * 353 1.1.1.1.2.2 bouyer * RETURN: Status 354 1.1.1.1.2.2 bouyer * 355 1.1.1.1.2.2 bouyer * DESCRIPTION: Get the device info for a single PCI device object. Get the 356 1.1.1.1.2.2 bouyer * _ADR (contains PCI device and function numbers), and for PCI 357 1.1.1.1.2.2 bouyer * bridge devices, get the bus number from PCI configuration 358 1.1.1.1.2.2 bouyer * space. 359 1.1.1.1.2.2 bouyer * 360 1.1.1.1.2.2 bouyer ******************************************************************************/ 361 1.1.1.1.2.2 bouyer 362 1.1.1.1.2.2 bouyer static ACPI_STATUS 363 1.1.1.1.2.2 bouyer AcpiHwGetPciDeviceInfo ( 364 1.1.1.1.2.2 bouyer ACPI_PCI_ID *PciId, 365 1.1.1.1.2.2 bouyer ACPI_HANDLE PciDevice, 366 1.1.1.1.2.2 bouyer UINT16 *BusNumber, 367 1.1.1.1.2.2 bouyer BOOLEAN *IsBridge) 368 1.1.1.1.2.2 bouyer { 369 1.1.1.1.2.2 bouyer ACPI_STATUS Status; 370 1.1.1.1.2.2 bouyer ACPI_OBJECT_TYPE ObjectType; 371 1.1.1.1.2.2 bouyer UINT64 ReturnValue; 372 1.1.1.1.2.2 bouyer UINT64 PciValue; 373 1.1.1.1.2.2 bouyer 374 1.1.1.1.2.2 bouyer 375 1.1.1.1.2.2 bouyer /* We only care about objects of type Device */ 376 1.1.1.1.2.2 bouyer 377 1.1.1.1.2.2 bouyer Status = AcpiGetType (PciDevice, &ObjectType); 378 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 379 1.1.1.1.2.2 bouyer { 380 1.1.1.1.2.2 bouyer return (Status); 381 1.1.1.1.2.2 bouyer } 382 1.1.1.1.2.2 bouyer 383 1.1.1.1.2.2 bouyer if (ObjectType != ACPI_TYPE_DEVICE) 384 1.1.1.1.2.2 bouyer { 385 1.1.1.1.2.2 bouyer return (AE_OK); 386 1.1.1.1.2.2 bouyer } 387 1.1.1.1.2.2 bouyer 388 1.1.1.1.2.2 bouyer /* We need an _ADR. Ignore device if not present */ 389 1.1.1.1.2.2 bouyer 390 1.1.1.1.2.2 bouyer Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 391 1.1.1.1.2.2 bouyer PciDevice, &ReturnValue); 392 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 393 1.1.1.1.2.2 bouyer { 394 1.1.1.1.2.2 bouyer return (AE_OK); 395 1.1.1.1.2.2 bouyer } 396 1.1.1.1.2.2 bouyer 397 1.1.1.1.2.2 bouyer /* 398 1.1.1.1.2.2 bouyer * From _ADR, get the PCI Device and Function and 399 1.1.1.1.2.2 bouyer * update the PCI ID. 400 1.1.1.1.2.2 bouyer */ 401 1.1.1.1.2.2 bouyer PciId->Device = ACPI_HIWORD (ACPI_LODWORD (ReturnValue)); 402 1.1.1.1.2.2 bouyer PciId->Function = ACPI_LOWORD (ACPI_LODWORD (ReturnValue)); 403 1.1.1.1.2.2 bouyer 404 1.1.1.1.2.2 bouyer /* 405 1.1.1.1.2.2 bouyer * If the previous device was a bridge, use the previous 406 1.1.1.1.2.2 bouyer * device bus number 407 1.1.1.1.2.2 bouyer */ 408 1.1.1.1.2.2 bouyer if (*IsBridge) 409 1.1.1.1.2.2 bouyer { 410 1.1.1.1.2.2 bouyer PciId->Bus = *BusNumber; 411 1.1.1.1.2.2 bouyer } 412 1.1.1.1.2.2 bouyer 413 1.1.1.1.2.2 bouyer /* 414 1.1.1.1.2.2 bouyer * Get the bus numbers from PCI Config space: 415 1.1.1.1.2.2 bouyer * 416 1.1.1.1.2.2 bouyer * First, get the PCI HeaderType 417 1.1.1.1.2.2 bouyer */ 418 1.1.1.1.2.2 bouyer *IsBridge = FALSE; 419 1.1.1.1.2.2 bouyer Status = AcpiOsReadPciConfiguration (PciId, 420 1.1.1.1.2.2 bouyer PCI_CFG_HEADER_TYPE_REG, &PciValue, 8); 421 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 422 1.1.1.1.2.2 bouyer { 423 1.1.1.1.2.2 bouyer return (Status); 424 1.1.1.1.2.2 bouyer } 425 1.1.1.1.2.2 bouyer 426 1.1.1.1.2.2 bouyer /* We only care about bridges (1=PciBridge, 2=CardBusBridge) */ 427 1.1.1.1.2.2 bouyer 428 1.1.1.1.2.2 bouyer PciValue &= PCI_HEADER_TYPE_MASK; 429 1.1.1.1.2.2 bouyer 430 1.1.1.1.2.2 bouyer if ((PciValue != PCI_TYPE_BRIDGE) && 431 1.1.1.1.2.2 bouyer (PciValue != PCI_TYPE_CARDBUS_BRIDGE)) 432 1.1.1.1.2.2 bouyer { 433 1.1.1.1.2.2 bouyer return (AE_OK); 434 1.1.1.1.2.2 bouyer } 435 1.1.1.1.2.2 bouyer 436 1.1.1.1.2.2 bouyer /* Bridge: Get the Primary BusNumber */ 437 1.1.1.1.2.2 bouyer 438 1.1.1.1.2.2 bouyer Status = AcpiOsReadPciConfiguration (PciId, 439 1.1.1.1.2.2 bouyer PCI_CFG_PRIMARY_BUS_NUMBER_REG, &PciValue, 8); 440 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 441 1.1.1.1.2.2 bouyer { 442 1.1.1.1.2.2 bouyer return (Status); 443 1.1.1.1.2.2 bouyer } 444 1.1.1.1.2.2 bouyer 445 1.1.1.1.2.2 bouyer *IsBridge = TRUE; 446 1.1.1.1.2.2 bouyer PciId->Bus = (UINT16) PciValue; 447 1.1.1.1.2.2 bouyer 448 1.1.1.1.2.2 bouyer /* Bridge: Get the Secondary BusNumber */ 449 1.1.1.1.2.2 bouyer 450 1.1.1.1.2.2 bouyer Status = AcpiOsReadPciConfiguration (PciId, 451 1.1.1.1.2.2 bouyer PCI_CFG_SECONDARY_BUS_NUMBER_REG, &PciValue, 8); 452 1.1.1.1.2.2 bouyer if (ACPI_FAILURE (Status)) 453 1.1.1.1.2.2 bouyer { 454 1.1.1.1.2.2 bouyer return (Status); 455 1.1.1.1.2.2 bouyer } 456 1.1.1.1.2.2 bouyer 457 1.1.1.1.2.2 bouyer *BusNumber = (UINT16) PciValue; 458 1.1.1.1.2.2 bouyer return (AE_OK); 459 1.1.1.1.2.2 bouyer } 460
Indexes created Thu Oct 16 14:10:15 GMT 2025