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MdeModulePkg PciBusDxe: The PCI Bus Driver is updated to support multiple PCI bus ranges for a PCI root bridge. 

Signed-off-by: rsun3
Reviewed-by: vanjeff


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12600 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3 2011-10-28 09:59:40 +00:00
parent 2d3fb91987
commit 306bbe82cb
4 changed files with 168 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
View File

@ -268,6 +268,11 @@ struct _PCI_IO_DEVICE {
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *ResourcePaddingDescriptors;
EFI_HPC_PADDING_ATTRIBUTES PaddingAttributes;
//
// Bus number ranges for a PCI Root Bridge device
//
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *BusNumberRanges;
BOOLEAN IsPciExp;
//
// For SR-IOV

84
MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
View File

@ -158,10 +158,16 @@ PciRootBridgeEnumerator (
{
EFI_STATUS Status;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration1;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration2;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Configuration3;
UINT8 SubBusNumber;
UINT8 StartBusNumber;
UINT8 PaddedBusRange;
EFI_HANDLE RootBridgeHandle;
UINT8 Desc;
UINT64 AddrLen;
UINT64 AddrRangeMin;
SubBusNumber = 0;
StartBusNumber = 0;
@ -191,11 +197,40 @@ PciRootBridgeEnumerator (
return Status;
}
if (Configuration == NULL || Configuration->Desc == ACPI_END_TAG_DESCRIPTOR) {
return EFI_INVALID_PARAMETER;
}
RootBridgeDev->BusNumberRanges = Configuration;
//
// Sort the descriptors in ascending order
//
for (Configuration1 = Configuration; Configuration1->Desc != ACPI_END_TAG_DESCRIPTOR; Configuration1++) {
Configuration2 = Configuration1;
for (Configuration3 = Configuration1 + 1; Configuration3->Desc != ACPI_END_TAG_DESCRIPTOR; Configuration3++) {
if (Configuration2->AddrRangeMin > Configuration3->AddrRangeMin) {
Configuration2 = Configuration3;
}
}
//
// All other fields other than AddrRangeMin and AddrLen are ignored in a descriptor,
// so only need to swap these two fields.
//
if (Configuration2 != Configuration1) {
AddrRangeMin = Configuration1->AddrRangeMin;
Configuration1->AddrRangeMin = Configuration2->AddrRangeMin;
Configuration2->AddrRangeMin = AddrRangeMin;
AddrLen = Configuration1->AddrLen;
Configuration1->AddrLen = Configuration2->AddrLen;
Configuration2->AddrLen = AddrLen;
}
}
//
// Get the bus number to start with
//
StartBusNumber = (UINT8) (Configuration->AddrRangeMin);
PaddedBusRange = (UINT8) (Configuration->AddrRangeMax);
//
// Initialize the subordinate bus number
@ -215,7 +250,7 @@ PciRootBridgeEnumerator (
//
Status = PciScanBus (
RootBridgeDev,
(UINT8) (Configuration->AddrRangeMin),
StartBusNumber,
&SubBusNumber,
&PaddedBusRange
);
@ -228,24 +263,45 @@ PciRootBridgeEnumerator (
//
// Assign max bus number scanned
//
Configuration->AddrLen = SubBusNumber - StartBusNumber + 1 + PaddedBusRange;
Status = PciAllocateBusNumber (RootBridgeDev, SubBusNumber, PaddedBusRange, &SubBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Find the bus range which contains the higest bus number, then returns the number of buses
// that should be decoded.
//
while (Configuration->AddrRangeMin + Configuration->AddrLen - 1 < SubBusNumber) {
Configuration++;
}
AddrLen = Configuration->AddrLen;
Configuration->AddrLen = SubBusNumber - Configuration->AddrRangeMin + 1;
//
// Save the Desc field of the next descriptor. Mark the next descriptor as an END descriptor.
//
Configuration++;
Desc = Configuration->Desc;
Configuration->Desc = ACPI_END_TAG_DESCRIPTOR;
//
// Set bus number
//
Status = PciResAlloc->SetBusNumbers (
PciResAlloc,
RootBridgeHandle,
Configuration
RootBridgeDev->BusNumberRanges
);
FreePool (Configuration);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
//
// Restore changed fields
//
Configuration->Desc = Desc;
(Configuration - 1)->AddrLen = AddrLen;
return Status;
}
/**
@ -351,7 +407,11 @@ PciAssignBusNumber (
//
// Reserved one bus for cardbus bridge
//
SecondBus = ++(*SubBusNumber);
Status = PciAllocateBusNumber (Bridge, *SubBusNumber, 1, SubBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
SecondBus = *SubBusNumber;
Register = (UINT16) ((SecondBus << 8) | (UINT16) StartBusNumber);

79
MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
View File

@ -896,6 +896,64 @@ PciHostBridgeResourceAllocator (
return EFI_SUCCESS;
}
/**
Allocate NumberOfBuses buses and return the next available PCI bus number.
@param Bridge Bridge device instance.
@param StartBusNumber Current available PCI bus number.
@param NumberOfBuses Number of buses enumerated below the StartBusNumber.
@param NextBusNumber Next available PCI bus number.
@retval EFI_SUCCESS Available bus number resource is enough. Next available PCI bus number
is returned in NextBusNumber.
@retval EFI_OUT_OF_RESOURCES Available bus number resource is not enough for allocation.
**/
EFI_STATUS
PciAllocateBusNumber (
IN PCI_IO_DEVICE *Bridge,
IN UINT8 StartBusNumber,
IN UINT8 NumberOfBuses,
OUT UINT8 *NextBusNumber
)
{
PCI_IO_DEVICE *RootBridge;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *BusNumberRanges;
UINT8 NextNumber;
UINT64 MaxNumberInRange;
//
// Get PCI Root Bridge device
//
RootBridge = Bridge;
while (RootBridge->Parent != NULL) {
RootBridge = RootBridge->Parent;
}
//
// Get next available PCI bus number
//
BusNumberRanges = RootBridge->BusNumberRanges;
while (BusNumberRanges->Desc != ACPI_END_TAG_DESCRIPTOR) {
MaxNumberInRange = BusNumberRanges->AddrRangeMin + BusNumberRanges->AddrLen - 1;
if (StartBusNumber >= BusNumberRanges->AddrRangeMin && StartBusNumber <= MaxNumberInRange) {
NextNumber = StartBusNumber + NumberOfBuses;
while (NextNumber > MaxNumberInRange) {
++BusNumberRanges;
if (BusNumberRanges->Desc == ACPI_END_TAG_DESCRIPTOR) {
return EFI_OUT_OF_RESOURCES;
}
NextNumber += (UINT8)(BusNumberRanges->AddrRangeMin - (MaxNumberInRange + 1));
MaxNumberInRange = BusNumberRanges->AddrRangeMin + BusNumberRanges->AddrLen - 1;
}
*NextBusNumber = NextNumber;
return EFI_SUCCESS;
}
BusNumberRanges++;
}
return EFI_OUT_OF_RESOURCES;
}
/**
Scan pci bus and assign bus number to the given PCI bus system.
@ -1100,15 +1158,10 @@ PciScanBus (
}
}
//
// Add feature to support customized secondary bus number
//
if (*SubBusNumber == 0) {
*SubBusNumber = *PaddedBusRange;
*PaddedBusRange = 0;
Status = PciAllocateBusNumber (Bridge, *SubBusNumber, 1, SubBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
(*SubBusNumber)++;
SecondBus = *SubBusNumber;
Register = (UINT16) ((SecondBus << 8) | (UINT16) StartBusNumber);
@ -1173,7 +1226,10 @@ PciScanBus (
(State & EFI_HPC_STATE_INITIALIZED) != 0) {
*PaddedBusRange = (UINT8) ((UINT8) (BusRange) +*PaddedBusRange);
} else {
*SubBusNumber = (UINT8) ((UINT8) (BusRange) +*SubBusNumber);
Status = PciAllocateBusNumber (PciDevice, *SubBusNumber, (UINT8) (BusRange), SubBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
}
}
@ -1197,7 +1253,10 @@ PciScanBus (
if (PcdGetBool (PcdSrIovSupport) && PciDevice->SrIovCapabilityOffset != 0) {
if (TempReservedBusNum < PciDevice->ReservedBusNum) {
(*SubBusNumber) = (UINT8)((*SubBusNumber) + PciDevice->ReservedBusNum - TempReservedBusNum);
Status = PciAllocateBusNumber (PciDevice, *SubBusNumber, (UINT8) (PciDevice->ReservedBusNum - TempReservedBusNum), SubBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
TempReservedBusNum = PciDevice->ReservedBusNum;
if (Func == 0) {

23
MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
View File

@ -1,7 +1,7 @@
/** @file
Internal library declaration for PCI Bus module.
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -74,6 +74,27 @@ PciHostBridgeResourceAllocator (
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc
);
/**
Allocate NumberOfBuses buses and return the next available PCI bus number.
@param Bridge Bridge device instance.
@param StartBusNumber Current available PCI bus number.
@param NumberOfBuses Number of buses enumerated below the StartBusNumber.
@param NextBusNumber Next available PCI bus number.
@retval EFI_SUCCESS Available bus number resource is enough. Next available PCI bus number
is returned in NextBusNumber.
@retval EFI_OUT_OF_RESOURCES Available bus number resource is not enough for allocation.
**/
EFI_STATUS
PciAllocateBusNumber (
IN PCI_IO_DEVICE *Bridge,
IN UINT8 StartBusNumber,
IN UINT8 NumberOfBuses,
OUT UINT8 *NextBusNumber
);
/**
Scan pci bus and assign bus number to the given PCI bus system.