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authorrsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>2011-10-28 09:59:40 +0000
committerrsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>2011-10-28 09:59:40 +0000
commit306bbe82cb0bae51db9b4ee0a891fd97660be769 (patch)
tree1937243724ddd8be1bfda3f6fc3b1143fe614992 /MdeModulePkg/Bus/Pci
parent2d3fb919872aaf67b8246fadc7bd20aa5d80dd43 (diff)
downloadedk2-platforms-306bbe82cb0bae51db9b4ee0a891fd97660be769.tar.xz
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
Diffstat (limited to 'MdeModulePkg/Bus/Pci')
-rw-r--r--MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h5
-rw-r--r--MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c84
-rw-r--r--MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c79
-rw-r--r--MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h23
4 files changed, 168 insertions, 23 deletions
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
index 239835eab7..d591f0a2c1 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
@@ -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
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
index 189ce1360f..42065738ed 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
@@ -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);
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
index eba5efdce2..87ee61956a 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
@@ -897,6 +897,64 @@ PciHostBridgeResourceAllocator (
}
/**
+ 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.
@param Bridge Bridge device instance.
@@ -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) {
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
index 87a846376f..6c2ade3f36 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
@@ -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
@@ -75,6 +75,27 @@ PciHostBridgeResourceAllocator (
);
/**
+ 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.
@param Bridge Bridge device instance.