EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *ResourcePaddingDescriptors;\r
EFI_HPC_PADDING_ATTRIBUTES PaddingAttributes;\r
\r
+ //\r
+ // Bus number ranges for a PCI Root Bridge device\r
+ //\r
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *BusNumberRanges;\r
+\r
BOOLEAN IsPciExp;\r
//\r
// For SR-IOV\r
{\r
EFI_STATUS Status;\r
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration;\r
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration1;\r
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration2;\r
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration3;\r
UINT8 SubBusNumber;\r
UINT8 StartBusNumber;\r
UINT8 PaddedBusRange;\r
EFI_HANDLE RootBridgeHandle;\r
+ UINT8 Desc;\r
+ UINT64 AddrLen;\r
+ UINT64 AddrRangeMin;\r
\r
SubBusNumber = 0;\r
StartBusNumber = 0;\r
return Status;\r
}\r
\r
+ if (Configuration == NULL || Configuration->Desc == ACPI_END_TAG_DESCRIPTOR) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+ RootBridgeDev->BusNumberRanges = Configuration;\r
+\r
+ //\r
+ // Sort the descriptors in ascending order\r
+ //\r
+ for (Configuration1 = Configuration; Configuration1->Desc != ACPI_END_TAG_DESCRIPTOR; Configuration1++) {\r
+ Configuration2 = Configuration1;\r
+ for (Configuration3 = Configuration1 + 1; Configuration3->Desc != ACPI_END_TAG_DESCRIPTOR; Configuration3++) {\r
+ if (Configuration2->AddrRangeMin > Configuration3->AddrRangeMin) {\r
+ Configuration2 = Configuration3;\r
+ }\r
+ }\r
+ //\r
+ // All other fields other than AddrRangeMin and AddrLen are ignored in a descriptor,\r
+ // so only need to swap these two fields.\r
+ //\r
+ if (Configuration2 != Configuration1) {\r
+ AddrRangeMin = Configuration1->AddrRangeMin;\r
+ Configuration1->AddrRangeMin = Configuration2->AddrRangeMin;\r
+ Configuration2->AddrRangeMin = AddrRangeMin;\r
+ \r
+ AddrLen = Configuration1->AddrLen;\r
+ Configuration1->AddrLen = Configuration2->AddrLen;\r
+ Configuration2->AddrLen = AddrLen;\r
+ }\r
+ }\r
+\r
//\r
// Get the bus number to start with\r
//\r
StartBusNumber = (UINT8) (Configuration->AddrRangeMin);\r
- PaddedBusRange = (UINT8) (Configuration->AddrRangeMax);\r
\r
//\r
// Initialize the subordinate bus number\r
//\r
Status = PciScanBus (\r
RootBridgeDev,\r
- (UINT8) (Configuration->AddrRangeMin),\r
+ StartBusNumber,\r
&SubBusNumber,\r
&PaddedBusRange\r
);\r
//\r
// Assign max bus number scanned\r
//\r
- Configuration->AddrLen = SubBusNumber - StartBusNumber + 1 + PaddedBusRange;\r
\r
+ Status = PciAllocateBusNumber (RootBridgeDev, SubBusNumber, PaddedBusRange, &SubBusNumber);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ } \r
+\r
+ //\r
+ // Find the bus range which contains the higest bus number, then returns the number of buses\r
+ // that should be decoded.\r
+ //\r
+ while (Configuration->AddrRangeMin + Configuration->AddrLen - 1 < SubBusNumber) {\r
+ Configuration++;\r
+ }\r
+ AddrLen = Configuration->AddrLen;\r
+ Configuration->AddrLen = SubBusNumber - Configuration->AddrRangeMin + 1;\r
+\r
+ //\r
+ // Save the Desc field of the next descriptor. Mark the next descriptor as an END descriptor.\r
+ //\r
+ Configuration++;\r
+ Desc = Configuration->Desc;\r
+ Configuration->Desc = ACPI_END_TAG_DESCRIPTOR;\r
+ \r
//\r
// Set bus number\r
//\r
Status = PciResAlloc->SetBusNumbers (\r
PciResAlloc,\r
RootBridgeHandle,\r
- Configuration\r
+ RootBridgeDev->BusNumberRanges\r
);\r
\r
- FreePool (Configuration);\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- return EFI_SUCCESS;\r
+ //\r
+ // Restore changed fields\r
+ //\r
+ Configuration->Desc = Desc;\r
+ (Configuration - 1)->AddrLen = AddrLen;\r
+ \r
+ return Status;\r
}\r
\r
/**\r
//\r
// Reserved one bus for cardbus bridge\r
//\r
- SecondBus = ++(*SubBusNumber);\r
+ Status = PciAllocateBusNumber (Bridge, *SubBusNumber, 1, SubBusNumber);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ SecondBus = *SubBusNumber;\r
\r
Register = (UINT16) ((SecondBus << 8) | (UINT16) StartBusNumber);\r
\r
return EFI_SUCCESS;\r
}\r
\r
+/**\r
+ Allocate NumberOfBuses buses and return the next available PCI bus number.\r
+\r
+ @param Bridge Bridge device instance.\r
+ @param StartBusNumber Current available PCI bus number.\r
+ @param NumberOfBuses Number of buses enumerated below the StartBusNumber.\r
+ @param NextBusNumber Next available PCI bus number.\r
+\r
+ @retval EFI_SUCCESS Available bus number resource is enough. Next available PCI bus number\r
+ is returned in NextBusNumber.\r
+ @retval EFI_OUT_OF_RESOURCES Available bus number resource is not enough for allocation.\r
+\r
+**/\r
+EFI_STATUS\r
+PciAllocateBusNumber (\r
+ IN PCI_IO_DEVICE *Bridge,\r
+ IN UINT8 StartBusNumber,\r
+ IN UINT8 NumberOfBuses,\r
+ OUT UINT8 *NextBusNumber\r
+ )\r
+{\r
+ PCI_IO_DEVICE *RootBridge;\r
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *BusNumberRanges;\r
+ UINT8 NextNumber;\r
+ UINT64 MaxNumberInRange;\r
+\r
+ //\r
+ // Get PCI Root Bridge device\r
+ //\r
+ RootBridge = Bridge;\r
+ while (RootBridge->Parent != NULL) {\r
+ RootBridge = RootBridge->Parent;\r
+ }\r
+\r
+ //\r
+ // Get next available PCI bus number\r
+ //\r
+ BusNumberRanges = RootBridge->BusNumberRanges;\r
+ while (BusNumberRanges->Desc != ACPI_END_TAG_DESCRIPTOR) {\r
+ MaxNumberInRange = BusNumberRanges->AddrRangeMin + BusNumberRanges->AddrLen - 1;\r
+ if (StartBusNumber >= BusNumberRanges->AddrRangeMin && StartBusNumber <= MaxNumberInRange) {\r
+ NextNumber = StartBusNumber + NumberOfBuses;\r
+ while (NextNumber > MaxNumberInRange) {\r
+ ++BusNumberRanges;\r
+ if (BusNumberRanges->Desc == ACPI_END_TAG_DESCRIPTOR) {\r
+ return EFI_OUT_OF_RESOURCES;\r
+ }\r
+ NextNumber += (UINT8)(BusNumberRanges->AddrRangeMin - (MaxNumberInRange + 1));\r
+ MaxNumberInRange = BusNumberRanges->AddrRangeMin + BusNumberRanges->AddrLen - 1;\r
+ }\r
+ *NextBusNumber = NextNumber;\r
+ return EFI_SUCCESS;\r
+ }\r
+ BusNumberRanges++;\r
+ }\r
+ return EFI_OUT_OF_RESOURCES;\r
+}\r
+\r
/**\r
Scan pci bus and assign bus number to the given PCI bus system.\r
\r
}\r
}\r
\r
- //\r
- // Add feature to support customized secondary bus number\r
- //\r
- if (*SubBusNumber == 0) {\r
- *SubBusNumber = *PaddedBusRange;\r
- *PaddedBusRange = 0;\r
+ Status = PciAllocateBusNumber (Bridge, *SubBusNumber, 1, SubBusNumber);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
}\r
-\r
- (*SubBusNumber)++;\r
SecondBus = *SubBusNumber;\r
\r
Register = (UINT16) ((SecondBus << 8) | (UINT16) StartBusNumber);\r
(State & EFI_HPC_STATE_INITIALIZED) != 0) {\r
*PaddedBusRange = (UINT8) ((UINT8) (BusRange) +*PaddedBusRange);\r
} else {\r
- *SubBusNumber = (UINT8) ((UINT8) (BusRange) +*SubBusNumber);\r
+ Status = PciAllocateBusNumber (PciDevice, *SubBusNumber, (UINT8) (BusRange), SubBusNumber);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
}\r
}\r
\r
if (PcdGetBool (PcdSrIovSupport) && PciDevice->SrIovCapabilityOffset != 0) {\r
if (TempReservedBusNum < PciDevice->ReservedBusNum) {\r
\r
- (*SubBusNumber) = (UINT8)((*SubBusNumber) + PciDevice->ReservedBusNum - TempReservedBusNum);\r
+ Status = PciAllocateBusNumber (PciDevice, *SubBusNumber, (UINT8) (PciDevice->ReservedBusNum - TempReservedBusNum), SubBusNumber);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
TempReservedBusNum = PciDevice->ReservedBusNum;\r
\r
if (Func == 0) {\r
/** @file\r
Internal library declaration for PCI Bus module.\r
\r
-Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc\r
);\r
\r
+/**\r
+ Allocate NumberOfBuses buses and return the next available PCI bus number.\r
+\r
+ @param Bridge Bridge device instance.\r
+ @param StartBusNumber Current available PCI bus number.\r
+ @param NumberOfBuses Number of buses enumerated below the StartBusNumber.\r
+ @param NextBusNumber Next available PCI bus number.\r
+\r
+ @retval EFI_SUCCESS Available bus number resource is enough. Next available PCI bus number\r
+ is returned in NextBusNumber.\r
+ @retval EFI_OUT_OF_RESOURCES Available bus number resource is not enough for allocation.\r
+\r
+**/\r
+EFI_STATUS\r
+PciAllocateBusNumber (\r
+ IN PCI_IO_DEVICE *Bridge,\r
+ IN UINT8 StartBusNumber,\r
+ IN UINT8 NumberOfBuses,\r
+ OUT UINT8 *NextBusNumber\r
+ );\r
+\r
/**\r
Scan pci bus and assign bus number to the given PCI bus system.\r
\r