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audk/IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c

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/**@file
Copyright (c) 2006, Intel Corporation
All rights reserved. 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
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "pcibus.h"
#include "PciEnumerator.h"
#include "PciResourceSupport.h"
#include "PciOptionRomSupport.h"
EFI_STATUS
PciEnumerator (
IN EFI_HANDLE Controller
)
/*++
Routine Description:
This routine is used to enumerate entire pci bus system
in a given platform
Arguments:
Returns:
None
--*/
// TODO: Controller - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_HANDLE HostBridgeHandle;
EFI_STATUS Status;
EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
//
// If PCI bus has already done the full enumeration, never do it again
//
if (!gFullEnumeration) {
return PciEnumeratorLight (Controller);
}
//
// If this host bridge has been already enumerated, then return successfully
//
if (RootBridgeExisted (Controller)) {
return EFI_SUCCESS;
}
//
// Get the rootbridge Io protocol to find the host bridge handle
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **) &PciRootBridgeIo,
gPciBusDriverBinding.DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the host bridge handle
//
HostBridgeHandle = PciRootBridgeIo->ParentHandle;
//
// Get the pci host bridge resource allocation protocol
//
Status = gBS->OpenProtocol (
HostBridgeHandle,
&gEfiPciHostBridgeResourceAllocationProtocolGuid,
(VOID **) &PciResAlloc,
gPciBusDriverBinding.DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Notify the pci bus enumeration is about to begin
//
NotifyPhase (PciResAlloc, EfiPciHostBridgeBeginEnumeration);
//
// Start the bus allocation phase
//
Status = PciHostBridgeEnumerator (PciResAlloc);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Submit the resource request
//
Status = PciHostBridgeResourceAllocator (PciResAlloc);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Process P2C
//
Status = PciHostBridgeP2CProcess (PciResAlloc);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Process attributes for devices on this host bridge
//
Status = PciHostBridgeDeviceAttribute (PciResAlloc);
if (EFI_ERROR (Status)) {
return Status;
}
gFullEnumeration = FALSE;
return EFI_SUCCESS;
}
EFI_STATUS
PciRootBridgeEnumerator (
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc,
IN PCI_IO_DEVICE *RootBridgeDev
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: PciResAlloc - add argument and description to function comment
// TODO: RootBridgeDev - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *pConfiguration;
UINT8 SubBusNumber;
UINT8 StartBusNumber;
UINT8 PaddedBusRange;
EFI_HANDLE RootBridgeHandle;
SubBusNumber = 0;
StartBusNumber = 0;
PaddedBusRange = 0;
//
// Get the root bridge handle
//
RootBridgeHandle = RootBridgeDev->Handle;
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_IO_BUS_PCI | EFI_IOB_PCI_PC_BUS_ENUM,
RootBridgeDev->DevicePath
);
//
// Get the Bus information
//
Status = PciResAlloc->StartBusEnumeration (
PciResAlloc,
RootBridgeHandle,
(VOID **) &pConfiguration
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the bus number to start with
//
StartBusNumber = (UINT8) (pConfiguration->AddrRangeMin);
PaddedBusRange = (UINT8) (pConfiguration->AddrRangeMax);
//
// Initialize the subordinate bus number
//
SubBusNumber = StartBusNumber;
//
// Reset all assigned PCI bus number
//
ResetAllPpbBusNumber (
RootBridgeDev,
StartBusNumber
);
//
// Assign bus number
//
Status = PciScanBus (
RootBridgeDev,
(UINT8) (pConfiguration->AddrRangeMin),
&SubBusNumber,
&PaddedBusRange
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Assign max bus number scanned
//
pConfiguration->AddrLen = SubBusNumber - StartBusNumber + 1 + PaddedBusRange;
//
// Set bus number
//
Status = PciResAlloc->SetBusNumbers (
PciResAlloc,
RootBridgeHandle,
pConfiguration
);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
EFI_STATUS
ProcessOptionRom (
IN PCI_IO_DEVICE *Bridge,
IN UINT64 RomBase,
IN UINT64 MaxLength
)
/*++
Routine Description:
This routine is used to process option rom on a certain root bridge
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: RomBase - add argument and description to function comment
// TODO: MaxLength - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
LIST_ENTRY *CurrentLink;
PCI_IO_DEVICE *Temp;
EFI_STATUS Status;
//
// Go through bridges to reach all devices
//
CurrentLink = Bridge->ChildList.ForwardLink;
while (CurrentLink && CurrentLink != &Bridge->ChildList) {
Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
if (!IsListEmpty (&Temp->ChildList)) {
//
// Go further to process the option rom under this bridge
//
Status = ProcessOptionRom (Temp, RomBase, MaxLength);
}
if (Temp->RomSize != 0 && Temp->RomSize <= MaxLength) {
//
// Load and process the option rom
//
Status = LoadOpRomImage (Temp, RomBase);
if (Status == EFI_SUCCESS) {
Status = ProcessOpRomImage (Temp);
}
}
CurrentLink = CurrentLink->ForwardLink;
}
return EFI_SUCCESS;
}
EFI_STATUS
PciAssignBusNumber (
IN PCI_IO_DEVICE *Bridge,
IN UINT8 StartBusNumber,
OUT UINT8 *SubBusNumber
)
/*++
Routine Description:
This routine is used to assign bus number to the given PCI bus system
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: StartBusNumber - add argument and description to function comment
// TODO: SubBusNumber - add argument and description to function comment
// TODO: EFI_DEVICE_ERROR - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
PCI_TYPE00 Pci;
UINT8 Device;
UINT8 Func;
UINT64 Address;
UINTN SecondBus;
UINT16 Register;
UINT8 Register8;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
PciRootBridgeIo = Bridge->PciRootBridgeIo;
SecondBus = 0;
Register = 0;
*SubBusNumber = StartBusNumber;
//
// First check to see whether the parent is ppb
//
for (Device = 0; Device <= PCI_MAX_DEVICE; Device++) {
for (Func = 0; Func <= PCI_MAX_FUNC; Func++) {
//
// Check to see whether a pci device is present
//
Status = PciDevicePresent (
PciRootBridgeIo,
&Pci,
StartBusNumber,
Device,
Func
);
if (!EFI_ERROR (Status) &&
(IS_PCI_BRIDGE (&Pci) || IS_CARDBUS_BRIDGE (&Pci))) {
//
// Reserved one bus for cardbus bridge
//
SecondBus = ++(*SubBusNumber);
Register = (UINT16) ((SecondBus << 8) | (UINT16) StartBusNumber);
Address = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0x18);
Status = PciRootBridgeIoWrite (
PciRootBridgeIo,
&Pci,
EfiPciWidthUint16,
Address,
1,
&Register
);
//
// Initialize SubBusNumber to SecondBus
//
Address = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0x1A);
Status = PciRootBridgeIoWrite (
PciRootBridgeIo,
&Pci,
EfiPciWidthUint8,
Address,
1,
SubBusNumber
);
//
// If it is PPB, resursively search down this bridge
//
if (IS_PCI_BRIDGE (&Pci)) {
Register8 = 0xFF;
Status = PciRootBridgeIoWrite (
PciRootBridgeIo,
&Pci,
EfiPciWidthUint8,
Address,
1,
&Register8
);
Status = PciAssignBusNumber (
Bridge,
(UINT8) (SecondBus),
SubBusNumber
);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
}
//
// Set the current maximum bus number under the PPB
//
Address = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0x1A);
Status = PciRootBridgeIoWrite (
PciRootBridgeIo,
&Pci,
EfiPciWidthUint8,
Address,
1,
SubBusNumber
);
}
if (Func == 0 && !IS_PCI_MULTI_FUNC (&Pci)) {
//
// Skip sub functions, this is not a multi function device
//
Func = PCI_MAX_FUNC;
}
}
}
return EFI_SUCCESS;
}
EFI_STATUS
DetermineRootBridgeAttributes (
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc,
IN PCI_IO_DEVICE *RootBridgeDev
)
/*++
Routine Description:
This routine is used to determine the root bridge attribute by interfacing
the host bridge resource allocation protocol.
Arguments:
Returns:
None
--*/
// TODO: PciResAlloc - add argument and description to function comment
// TODO: RootBridgeDev - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINT64 Attributes;
EFI_STATUS Status;
EFI_HANDLE RootBridgeHandle;
Attributes = 0;
RootBridgeHandle = RootBridgeDev->Handle;
//
// Get root bridge attribute by calling into pci host bridge resource allocation protocol
//
Status = PciResAlloc->GetAllocAttributes (
PciResAlloc,
RootBridgeHandle,
&Attributes
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Here is the point where PCI bus driver calls HOST bridge allocation protocol
// Currently we hardcoded for ea815
//
if (Attributes & EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM) {
RootBridgeDev->Decodes |= EFI_BRIDGE_PMEM_MEM_COMBINE_SUPPORTED;
}
if (Attributes & EFI_PCI_HOST_BRIDGE_MEM64_DECODE) {
RootBridgeDev->Decodes |= EFI_BRIDGE_PMEM64_DECODE_SUPPORTED;
}
RootBridgeDev->Decodes |= EFI_BRIDGE_MEM32_DECODE_SUPPORTED;
RootBridgeDev->Decodes |= EFI_BRIDGE_PMEM32_DECODE_SUPPORTED;
RootBridgeDev->Decodes |= EFI_BRIDGE_IO16_DECODE_SUPPORTED;
return EFI_SUCCESS;
}
UINT64
GetMaxOptionRomSize (
IN PCI_IO_DEVICE *Bridge
)
/*++
Routine Description:
Get Max Option Rom size on this bridge
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
{
LIST_ENTRY *CurrentLink;
PCI_IO_DEVICE *Temp;
UINT64 MaxOptionRomSize;
UINT64 TempOptionRomSize;
MaxOptionRomSize = 0;
//
// Go through bridges to reach all devices
//
CurrentLink = Bridge->ChildList.ForwardLink;
while (CurrentLink && CurrentLink != &Bridge->ChildList) {
Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
if (!IsListEmpty (&Temp->ChildList)) {
//
// Get max option rom size under this bridge
//
TempOptionRomSize = GetMaxOptionRomSize (Temp);
//
// Compare with the option rom size of the bridge
// Get the larger one
//
if (Temp->RomSize > TempOptionRomSize) {
TempOptionRomSize = Temp->RomSize;
}
} else {
//
// For devices get the rom size directly
//
TempOptionRomSize = Temp->RomSize;
}
//
// Get the largest rom size on this bridge
//
if (TempOptionRomSize > MaxOptionRomSize) {
MaxOptionRomSize = TempOptionRomSize;
}
CurrentLink = CurrentLink->ForwardLink;
}
return MaxOptionRomSize;
}
EFI_STATUS
PciHostBridgeDeviceAttribute (
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc
)
/*++
Routine Description:
Process attributes of devices on this host bridge
Arguments:
Returns:
None
--*/
// TODO: PciResAlloc - add argument and description to function comment
// TODO: EFI_NOT_FOUND - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_HANDLE RootBridgeHandle;
PCI_IO_DEVICE *RootBridgeDev;
EFI_STATUS Status;
RootBridgeHandle = NULL;
while (PciResAlloc->GetNextRootBridge (PciResAlloc, &RootBridgeHandle) == EFI_SUCCESS) {
//
// Get RootBridg Device by handle
//
RootBridgeDev = GetRootBridgeByHandle (RootBridgeHandle);
if (RootBridgeDev == NULL) {
return EFI_NOT_FOUND;
}
//
// Set the attributes for devcies behind the Root Bridge
//
Status = DetermineDeviceAttribute (RootBridgeDev);
if (EFI_ERROR (Status)) {
return Status;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
GetResourceAllocationStatus (
VOID *AcpiConfig,
OUT UINT64 *IoResStatus,
OUT UINT64 *Mem32ResStatus,
OUT UINT64 *PMem32ResStatus,
OUT UINT64 *Mem64ResStatus,
OUT UINT64 *PMem64ResStatus
)
/*++
Routine Description:
Get resource allocation status from the ACPI pointer
Arguments:
Returns:
None
--*/
// TODO: AcpiConfig - add argument and description to function comment
// TODO: IoResStatus - add argument and description to function comment
// TODO: Mem32ResStatus - add argument and description to function comment
// TODO: PMem32ResStatus - add argument and description to function comment
// TODO: Mem64ResStatus - add argument and description to function comment
// TODO: PMem64ResStatus - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINT8 *Temp;
UINT64 ResStatus;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *ptr;
Temp = (UINT8 *) AcpiConfig;
while (*Temp == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Temp;
ResStatus = ptr->AddrTranslationOffset;
switch (ptr->ResType) {
case 0:
if (ptr->AddrSpaceGranularity == 32) {
if (ptr->SpecificFlag == 0x06) {
//
// Pmem32
//
*PMem32ResStatus = ResStatus;
} else {
//
// Mem32
//
*Mem32ResStatus = ResStatus;
}
}
if (ptr->AddrSpaceGranularity == 64) {
if (ptr->SpecificFlag == 0x06) {
//
// PMem64
//
*PMem64ResStatus = ResStatus;
} else {
//
// Mem64
//
*Mem64ResStatus = ResStatus;
}
}
break;
case 1:
//
// Io
//
*IoResStatus = ResStatus;
break;
default:
break;
}
Temp += sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR);
}
return EFI_SUCCESS;
}
EFI_STATUS
RejectPciDevice (
IN PCI_IO_DEVICE *PciDevice
)
/*++
Routine Description:
Remove a PCI device from device pool and mark its bar
Arguments:
Returns:
None
--*/
// TODO: PciDevice - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_ABORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_ABORTED - add return value to function comment
{
PCI_IO_DEVICE *Bridge;
PCI_IO_DEVICE *Temp;
LIST_ENTRY *CurrentLink;
//
// Remove the padding resource from a bridge
//
if ( IS_PCI_BRIDGE(&PciDevice->Pci) && \
PciDevice->ResourcePaddingDescriptors ) {
gBS->FreePool (PciDevice->ResourcePaddingDescriptors);
PciDevice->ResourcePaddingDescriptors = NULL;
return EFI_SUCCESS;
}
//
// Skip RB and PPB
//
if (IS_PCI_BRIDGE (&PciDevice->Pci) || (!PciDevice->Parent)) {
return EFI_ABORTED;
}
if (IS_CARDBUS_BRIDGE (&PciDevice->Pci)) {
//
// Get the root bridge device
//
Bridge = PciDevice;
while (Bridge->Parent) {
Bridge = Bridge->Parent;
}
RemoveAllPciDeviceOnBridge (Bridge->Handle, PciDevice);
//
// Mark its bar
//
InitializeP2C (PciDevice);
}
//
// Remove the device
//
Bridge = PciDevice->Parent;
CurrentLink = Bridge->ChildList.ForwardLink;
while (CurrentLink && CurrentLink != &Bridge->ChildList) {
Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
if (Temp == PciDevice) {
InitializePciDevice (Temp);
RemoveEntryList (CurrentLink);
FreePciDevice (Temp);
return EFI_SUCCESS;
}
CurrentLink = CurrentLink->ForwardLink;
}
return EFI_ABORTED;
}
BOOLEAN
IsRejectiveDevice (
IN PCI_RESOURCE_NODE *PciResNode
)
/*++
Routine Description:
Determine whethter a PCI device can be rejected
Arguments:
Returns:
None
--*/
// TODO: PciResNode - add argument and description to function comment
{
PCI_IO_DEVICE *Temp;
Temp = PciResNode->PciDev;
//
// Ensure the device is present
//
if (!Temp) {
return FALSE;
}
//
// PPB and RB should go ahead
//
if (IS_PCI_BRIDGE (&Temp->Pci) || (!Temp->Parent)) {
return TRUE;
}
//
// Skip device on Bus0
//
if ((Temp->Parent) && (Temp->BusNumber == 0)) {
return FALSE;
}
//
// Skip VGA
//
if (IS_PCI_VGA (&Temp->Pci)) {
return FALSE;
}
return TRUE;
}
PCI_RESOURCE_NODE *
GetLargerConsumerDevice (
IN PCI_RESOURCE_NODE *PciResNode1,
IN PCI_RESOURCE_NODE *PciResNode2
)
/*++
Routine Description:
Get the larger resource consumer
Arguments:
Returns:
None
--*/
// TODO: PciResNode1 - add argument and description to function comment
// TODO: PciResNode2 - add argument and description to function comment
{
if (!PciResNode2) {
return PciResNode1;
}
if ((IS_PCI_BRIDGE(&(PciResNode2->PciDev->Pci)) || !(PciResNode2->PciDev->Parent)) \
&& (PciResNode2->ResourceUsage != PciResUsagePadding) )
{
return PciResNode1;
}
if (!PciResNode1) {
return PciResNode2;
}
if ((PciResNode1->Length) > (PciResNode2->Length)) {
return PciResNode1;
}
return PciResNode2;
}
PCI_RESOURCE_NODE *
GetMaxResourceConsumerDevice (
IN PCI_RESOURCE_NODE *ResPool
)
/*++
Routine Description:
Get the max resource consumer in the host resource pool
Arguments:
Returns:
None
--*/
// TODO: ResPool - add argument and description to function comment
{
PCI_RESOURCE_NODE *Temp;
LIST_ENTRY *CurrentLink;
PCI_RESOURCE_NODE *PciResNode;
PCI_RESOURCE_NODE *PPBResNode;
PciResNode = NULL;
CurrentLink = ResPool->ChildList.ForwardLink;
while (CurrentLink && CurrentLink != &ResPool->ChildList) {
Temp = RESOURCE_NODE_FROM_LINK (CurrentLink);
if (!IsRejectiveDevice (Temp)) {
CurrentLink = CurrentLink->ForwardLink;
continue;
}
if ((IS_PCI_BRIDGE (&(Temp->PciDev->Pci)) || (!Temp->PciDev->Parent)) \
&& (Temp->ResourceUsage != PciResUsagePadding))
{
PPBResNode = GetMaxResourceConsumerDevice (Temp);
PciResNode = GetLargerConsumerDevice (PciResNode, PPBResNode);
} else {
PciResNode = GetLargerConsumerDevice (PciResNode, Temp);
}
CurrentLink = CurrentLink->ForwardLink;
}
return PciResNode;
}
EFI_STATUS
PciHostBridgeAdjustAllocation (
IN PCI_RESOURCE_NODE *IoPool,
IN PCI_RESOURCE_NODE *Mem32Pool,
IN PCI_RESOURCE_NODE *PMem32Pool,
IN PCI_RESOURCE_NODE *Mem64Pool,
IN PCI_RESOURCE_NODE *PMem64Pool,
IN UINT64 IoResStatus,
IN UINT64 Mem32ResStatus,
IN UINT64 PMem32ResStatus,
IN UINT64 Mem64ResStatus,
IN UINT64 PMem64ResStatus
)
/*++
Routine Description:
Adjust host bridge allocation so as to reduce resource requirement
Arguments:
Returns:
None
--*/
// TODO: IoPool - add argument and description to function comment
// TODO: Mem32Pool - add argument and description to function comment
// TODO: PMem32Pool - add argument and description to function comment
// TODO: Mem64Pool - add argument and description to function comment
// TODO: PMem64Pool - add argument and description to function comment
// TODO: IoResStatus - add argument and description to function comment
// TODO: Mem32ResStatus - add argument and description to function comment
// TODO: PMem32ResStatus - add argument and description to function comment
// TODO: Mem64ResStatus - add argument and description to function comment
// TODO: PMem64ResStatus - add argument and description to function comment
// TODO: EFI_ABORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_ABORTED - add return value to function comment
{
BOOLEAN AllocationAjusted;
PCI_RESOURCE_NODE *PciResNode;
PCI_RESOURCE_NODE *ResPool[5];
PCI_IO_DEVICE *RemovedPciDev[5];
UINT64 ResStatus[5];
UINTN RemovedPciDevNum;
UINTN DevIndex;
UINTN ResType;
EFI_STATUS Status;
EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA_PAYLOAD AllocFailExtendedData;
PciResNode = NULL;
ZeroMem (RemovedPciDev, 5 * sizeof (PCI_IO_DEVICE *));
RemovedPciDevNum = 0;
ResPool[0] = IoPool;
ResPool[1] = Mem32Pool;
ResPool[2] = PMem32Pool;
ResPool[3] = Mem64Pool;
ResPool[4] = PMem64Pool;
ResStatus[0] = IoResStatus;
ResStatus[1] = Mem32ResStatus;
ResStatus[2] = PMem32ResStatus;
ResStatus[3] = Mem64ResStatus;
ResStatus[4] = PMem64ResStatus;
AllocationAjusted = FALSE;
for (ResType = 0; ResType < 5; ResType++) {
if (ResStatus[ResType] == EFI_RESOURCE_SATISFIED) {
continue;
}
if (ResStatus[ResType] == EFI_RESOURCE_NONEXISTENT) {
//
// Hostbridge hasn't this resource type
//
return EFI_ABORTED;
}
//
// Hostbridge hasn't enough resource
//
PciResNode = GetMaxResourceConsumerDevice (ResPool[ResType]);
if (!PciResNode) {
continue;
}
//
// Check if the device has been removed before
//
for (DevIndex = 0; DevIndex < RemovedPciDevNum; DevIndex++) {
if (PciResNode->PciDev == RemovedPciDev[DevIndex]) {
continue;
}
}
//
// Remove the device if it isn't in the array
//
Status = RejectPciDevice (PciResNode->PciDev);
if (Status == EFI_SUCCESS) {
//
// Raise the EFI_IOB_EC_RESOURCE_CONFLICT status code
//
//
// Have no way to get ReqRes, AllocRes & Bar here
//
ZeroMem (&AllocFailExtendedData, sizeof (AllocFailExtendedData));
AllocFailExtendedData.DevicePathSize = sizeof (EFI_DEVICE_PATH_PROTOCOL);
AllocFailExtendedData.DevicePath = (UINT8 *) PciResNode->PciDev->DevicePath;
AllocFailExtendedData.Bar = PciResNode->Bar;
REPORT_STATUS_CODE_WITH_EXTENDED_DATA (
EFI_PROGRESS_CODE,
EFI_IO_BUS_PCI | EFI_IOB_EC_RESOURCE_CONFLICT,
(VOID *) &AllocFailExtendedData,
sizeof (AllocFailExtendedData)
);
//
// Add it to the array and indicate at least a device has been rejected
//
RemovedPciDev[RemovedPciDevNum++] = PciResNode->PciDev;
AllocationAjusted = TRUE;
}
}
//
// End for
//
if (AllocationAjusted) {
return EFI_SUCCESS;
} else {
return EFI_ABORTED;
}
}
EFI_STATUS
ConstructAcpiResourceRequestor (
IN PCI_IO_DEVICE *Bridge,
IN PCI_RESOURCE_NODE *IoNode,
IN PCI_RESOURCE_NODE *Mem32Node,
IN PCI_RESOURCE_NODE *PMem32Node,
IN PCI_RESOURCE_NODE *Mem64Node,
IN PCI_RESOURCE_NODE *PMem64Node,
OUT VOID **pConfig
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: IoNode - add argument and description to function comment
// TODO: Mem32Node - add argument and description to function comment
// TODO: PMem32Node - add argument and description to function comment
// TODO: Mem64Node - add argument and description to function comment
// TODO: PMem64Node - add argument and description to function comment
// TODO: pConfig - add argument and description to function comment
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINT8 NumConfig;
UINT8 Aperture;
UINT8 *Configuration;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Ptr;
EFI_ACPI_END_TAG_DESCRIPTOR *PtrEnd;
NumConfig = 0;
Aperture = 0;
*pConfig = NULL;
//
// if there is io request, add to the io aperture
//
if (ResourceRequestExisted (IoNode)) {
NumConfig++;
Aperture |= 0x01;
}
//
// if there is mem32 request, add to the mem32 aperture
//
if (ResourceRequestExisted (Mem32Node)) {
NumConfig++;
Aperture |= 0x02;
}
//
// if there is pmem32 request, add to the pmem32 aperture
//
if (ResourceRequestExisted (PMem32Node)) {
NumConfig++;
Aperture |= 0x04;
}
//
// if there is mem64 request, add to the mem64 aperture
//
if (ResourceRequestExisted (Mem64Node)) {
NumConfig++;
Aperture |= 0x08;
}
//
// if there is pmem64 request, add to the pmem64 aperture
//
if (ResourceRequestExisted (PMem64Node)) {
NumConfig++;
Aperture |= 0x10;
}
if (NumConfig != 0) {
//
// If there is at least one type of resource request,
// allocate a acpi resource node
//
Configuration = AllocatePool (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) * NumConfig + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR));
if (Configuration == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ZeroMem (
Configuration,
sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) * NumConfig + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR)
);
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration;
//
// Deal with io aperture
//
if (Aperture & 0x01) {
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
Ptr->Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3;
//
// Io
//
Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_IO;
//
// non ISA range
//
Ptr->SpecificFlag = 1;
Ptr->AddrLen = IoNode->Length;
Ptr->AddrRangeMax = IoNode->Alignment;
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) ((UINT8 *) Ptr + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
}
//
// Deal with mem32 aperture
//
if (Aperture & 0x02) {
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
Ptr->Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3;
//
// Mem
//
Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;
//
// Nonprefechable
//
Ptr->SpecificFlag = 0;
//
// 32 bit
//
Ptr->AddrSpaceGranularity = 32;
Ptr->AddrLen = Mem32Node->Length;
Ptr->AddrRangeMax = Mem32Node->Alignment;
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) ((UINT8 *) Ptr + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
}
//
// Deal with Pmem32 aperture
//
if (Aperture & 0x04) {
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
Ptr->Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3;
//
// Mem
//
Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;
//
// prefechable
//
Ptr->SpecificFlag = 0x6;
//
// 32 bit
//
Ptr->AddrSpaceGranularity = 32;
Ptr->AddrLen = PMem32Node->Length;
Ptr->AddrRangeMax = PMem32Node->Alignment;
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) ((UINT8 *) Ptr + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
}
//
// Deal with mem64 aperture
//
if (Aperture & 0x08) {
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
Ptr->Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3;
//
// Mem
//
Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;
//
// nonprefechable
//
Ptr->SpecificFlag = 0;
//
// 64 bit
//
Ptr->AddrSpaceGranularity = 64;
Ptr->AddrLen = Mem64Node->Length;
Ptr->AddrRangeMax = Mem64Node->Alignment;
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) ((UINT8 *) Ptr + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
}
//
// Deal with Pmem64 aperture
//
if (Aperture & 0x10) {
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
Ptr->Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3;
//
// Mem
//
Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;
//
// prefechable
//
Ptr->SpecificFlag = 0x06;
//
// 64 bit
//
Ptr->AddrSpaceGranularity = 64;
Ptr->AddrLen = PMem64Node->Length;
Ptr->AddrRangeMax = PMem64Node->Alignment;
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) (Configuration + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
}
//
// put the checksum
//
PtrEnd = (EFI_ACPI_END_TAG_DESCRIPTOR *) ((UINT8 *) Ptr);
PtrEnd->Desc = ACPI_END_TAG_DESCRIPTOR;
PtrEnd->Checksum = 0;
} else {
//
// If there is no resource request
//
Configuration = AllocatePool (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR));
if (Configuration == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ZeroMem (Configuration, sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR));
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) (Configuration);
Ptr->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
PtrEnd = (EFI_ACPI_END_TAG_DESCRIPTOR *) (Configuration + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));
PtrEnd->Desc = ACPI_END_TAG_DESCRIPTOR;
PtrEnd->Checksum = 0;
}
*pConfig = Configuration;
return EFI_SUCCESS;
}
EFI_STATUS
GetResourceBase (
IN VOID *pConfig,
OUT UINT64 *IoBase,
OUT UINT64 *Mem32Base,
OUT UINT64 *PMem32Base,
OUT UINT64 *Mem64Base,
OUT UINT64 *PMem64Base
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: pConfig - add argument and description to function comment
// TODO: IoBase - add argument and description to function comment
// TODO: Mem32Base - add argument and description to function comment
// TODO: PMem32Base - add argument and description to function comment
// TODO: Mem64Base - add argument and description to function comment
// TODO: PMem64Base - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINT8 *Temp;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Ptr;
UINT64 ResStatus;
*IoBase = 0xFFFFFFFFFFFFFFFFULL;
*Mem32Base = 0xFFFFFFFFFFFFFFFFULL;
*PMem32Base = 0xFFFFFFFFFFFFFFFFULL;
*Mem64Base = 0xFFFFFFFFFFFFFFFFULL;
*PMem64Base = 0xFFFFFFFFFFFFFFFFULL;
Temp = (UINT8 *) pConfig;
while (*Temp == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Temp;
ResStatus = Ptr->AddrTranslationOffset;
if (ResStatus == EFI_RESOURCE_SATISFIED) {
switch (Ptr->ResType) {
//
// Memory type aperture
//
case 0:
//
// Check to see the granularity
//
if (Ptr->AddrSpaceGranularity == 32) {
if (Ptr->SpecificFlag & 0x06) {
*PMem32Base = Ptr->AddrRangeMin;
} else {
*Mem32Base = Ptr->AddrRangeMin;
}
}
if (Ptr->AddrSpaceGranularity == 64) {
if (Ptr->SpecificFlag & 0x06) {
*PMem64Base = Ptr->AddrRangeMin;
} else {
*Mem64Base = Ptr->AddrRangeMin;
}
}
break;
case 1:
//
// Io type aperture
//
*IoBase = Ptr->AddrRangeMin;
break;
default:
break;
}
//
// End switch
//
}
//
// End for
//
Temp += sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR);
}
return EFI_SUCCESS;
}
EFI_STATUS
PciBridgeEnumerator (
IN PCI_IO_DEVICE *BridgeDev
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: BridgeDev - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINT8 SubBusNumber;
UINT8 StartBusNumber;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_STATUS Status;
SubBusNumber = 0;
StartBusNumber = 0;
PciIo = &(BridgeDev->PciIo);
Status = PciIoRead (PciIo, EfiPciIoWidthUint8, 0x19, 1, &StartBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PciAssignBusNumber (
BridgeDev,
StartBusNumber,
&SubBusNumber
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PciPciDeviceInfoCollector (BridgeDev, StartBusNumber);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PciBridgeResourceAllocator (BridgeDev);
if (EFI_ERROR (Status)) {
return Status;
}
Status = DetermineDeviceAttribute (BridgeDev);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
EFI_STATUS
PciBridgeResourceAllocator (
IN PCI_IO_DEVICE *Bridge
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
PCI_RESOURCE_NODE *IoBridge;
PCI_RESOURCE_NODE *Mem32Bridge;
PCI_RESOURCE_NODE *PMem32Bridge;
PCI_RESOURCE_NODE *Mem64Bridge;
PCI_RESOURCE_NODE *PMem64Bridge;
UINT64 IoBase;
UINT64 Mem32Base;
UINT64 PMem32Base;
UINT64 Mem64Base;
UINT64 PMem64Base;
EFI_STATUS Status;
IoBridge = CreateResourceNode (
Bridge,
0,
0xFFF,
0,
PciBarTypeIo16,
PciResUsageTypical
);
Mem32Bridge = CreateResourceNode (
Bridge,
0,
0xFFFFF,
0,
PciBarTypeMem32,
PciResUsageTypical
);
PMem32Bridge = CreateResourceNode (
Bridge,
0,
0xFFFFF,
0,
PciBarTypePMem32,
PciResUsageTypical
);
Mem64Bridge = CreateResourceNode (
Bridge,
0,
0xFFFFF,
0,
PciBarTypeMem64,
PciResUsageTypical
);
PMem64Bridge = CreateResourceNode (
Bridge,
0,
0xFFFFF,
0,
PciBarTypePMem64,
PciResUsageTypical
);
//
// Create resourcemap by going through all the devices subject to this root bridge
//
Status = CreateResourceMap (
Bridge,
IoBridge,
Mem32Bridge,
PMem32Bridge,
Mem64Bridge,
PMem64Bridge
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = GetResourceBaseFromBridge (
Bridge,
&IoBase,
&Mem32Base,
&PMem32Base,
&Mem64Base,
&PMem64Base
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Program IO resources
//
ProgramResource (
IoBase,
IoBridge
);
//
// Program Mem32 resources
//
ProgramResource (
Mem32Base,
Mem32Bridge
);
//
// Program PMem32 resources
//
ProgramResource (
PMem32Base,
PMem32Bridge
);
//
// Program Mem64 resources
//
ProgramResource (
Mem64Base,
Mem64Bridge
);
//
// Program PMem64 resources
//
ProgramResource (
PMem64Base,
PMem64Bridge
);
DestroyResourceTree (IoBridge);
DestroyResourceTree (Mem32Bridge);
DestroyResourceTree (PMem32Bridge);
DestroyResourceTree (PMem64Bridge);
DestroyResourceTree (Mem64Bridge);
gBS->FreePool (IoBridge);
gBS->FreePool (Mem32Bridge);
gBS->FreePool (PMem32Bridge);
gBS->FreePool (PMem64Bridge);
gBS->FreePool (Mem64Bridge);
return EFI_SUCCESS;
}
EFI_STATUS
GetResourceBaseFromBridge (
IN PCI_IO_DEVICE *Bridge,
OUT UINT64 *IoBase,
OUT UINT64 *Mem32Base,
OUT UINT64 *PMem32Base,
OUT UINT64 *Mem64Base,
OUT UINT64 *PMem64Base
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: IoBase - add argument and description to function comment
// TODO: Mem32Base - add argument and description to function comment
// TODO: PMem32Base - add argument and description to function comment
// TODO: Mem64Base - add argument and description to function comment
// TODO: PMem64Base - add argument and description to function comment
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
if (!Bridge->Allocated) {
return EFI_OUT_OF_RESOURCES;
}
*IoBase = gAllOne;
*Mem32Base = gAllOne;
*PMem32Base = gAllOne;
*Mem64Base = gAllOne;
*PMem64Base = gAllOne;
if (IS_PCI_BRIDGE (&Bridge->Pci)) {
if (Bridge->PciBar[PPB_IO_RANGE].Length) {
*IoBase = Bridge->PciBar[PPB_IO_RANGE].BaseAddress;
}
if (Bridge->PciBar[PPB_MEM32_RANGE].Length) {
*Mem32Base = Bridge->PciBar[PPB_MEM32_RANGE].BaseAddress;
}
if (Bridge->PciBar[PPB_PMEM32_RANGE].Length) {
*PMem32Base = Bridge->PciBar[PPB_PMEM32_RANGE].BaseAddress;
}
if (Bridge->PciBar[PPB_PMEM64_RANGE].Length) {
*PMem64Base = Bridge->PciBar[PPB_PMEM64_RANGE].BaseAddress;
} else {
*PMem64Base = gAllOne;
}
}
if (IS_CARDBUS_BRIDGE (&Bridge->Pci)) {
if (Bridge->PciBar[P2C_IO_1].Length) {
*IoBase = Bridge->PciBar[P2C_IO_1].BaseAddress;
} else {
if (Bridge->PciBar[P2C_IO_2].Length) {
*IoBase = Bridge->PciBar[P2C_IO_2].BaseAddress;
}
}
if (Bridge->PciBar[P2C_MEM_1].Length) {
if (Bridge->PciBar[P2C_MEM_1].BarType == PciBarTypePMem32) {
*PMem32Base = Bridge->PciBar[P2C_MEM_1].BaseAddress;
}
if (Bridge->PciBar[P2C_MEM_1].BarType == PciBarTypeMem32) {
*Mem32Base = Bridge->PciBar[P2C_MEM_1].BaseAddress;
}
}
if (Bridge->PciBar[P2C_MEM_2].Length) {
if (Bridge->PciBar[P2C_MEM_2].BarType == PciBarTypePMem32) {
*PMem32Base = Bridge->PciBar[P2C_MEM_2].BaseAddress;
}
if (Bridge->PciBar[P2C_MEM_2].BarType == PciBarTypeMem32) {
*Mem32Base = Bridge->PciBar[P2C_MEM_2].BaseAddress;
}
}
}
return EFI_SUCCESS;
}
EFI_STATUS
NotifyPhase (
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc,
EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PHASE Phase
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: PciResAlloc - add argument and description to function comment
// TODO: Phase - add argument and description to function comment
// TODO: EFI_NOT_FOUND - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_HANDLE HostBridgeHandle;
EFI_HANDLE RootBridgeHandle;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
EFI_STATUS Status;
HostBridgeHandle = NULL;
RootBridgeHandle = NULL;
if (gPciPlatformProtocol != NULL) {
//
// Get Host Bridge Handle.
//
PciResAlloc->GetNextRootBridge (PciResAlloc, &RootBridgeHandle);
//
// Get the rootbridge Io protocol to find the host bridge handle
//
Status = gBS->HandleProtocol (
RootBridgeHandle,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **) &PciRootBridgeIo
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
HostBridgeHandle = PciRootBridgeIo->ParentHandle;
//
// Call PlatformPci::PhaseNotify() if the protocol is present.
//
gPciPlatformProtocol->PhaseNotify (
gPciPlatformProtocol,
HostBridgeHandle,
Phase,
ChipsetEntry
);
}
Status = PciResAlloc->NotifyPhase (
PciResAlloc,
Phase
);
if (gPciPlatformProtocol != NULL) {
//
// Call PlatformPci::PhaseNotify() if the protocol is present.
//
gPciPlatformProtocol->PhaseNotify (
gPciPlatformProtocol,
HostBridgeHandle,
Phase,
ChipsetExit
);
}
return EFI_SUCCESS;
}
EFI_STATUS
PreprocessController (
IN PCI_IO_DEVICE *Bridge,
IN UINT8 Bus,
IN UINT8 Device,
IN UINT8 Func,
IN EFI_PCI_CONTROLLER_RESOURCE_ALLOCATION_PHASE Phase
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: Bridge - add argument and description to function comment
// TODO: Bus - add argument and description to function comment
// TODO: Device - add argument and description to function comment
// TODO: Func - add argument and description to function comment
// TODO: Phase - add argument and description to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS RootBridgePciAddress;
EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc;
EFI_HANDLE RootBridgeHandle;
EFI_HANDLE HostBridgeHandle;
EFI_STATUS Status;
//
// Get the host bridge handle
//
HostBridgeHandle = Bridge->PciRootBridgeIo->ParentHandle;
//
// Get the pci host bridge resource allocation protocol
//
Status = gBS->OpenProtocol (
HostBridgeHandle,
&gEfiPciHostBridgeResourceAllocationProtocolGuid,
(VOID **) &PciResAlloc,
NULL,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
//
// Get Root Brige Handle
//
while (Bridge->Parent) {
Bridge = Bridge->Parent;
}
RootBridgeHandle = Bridge->Handle;
RootBridgePciAddress.Register = 0;
RootBridgePciAddress.Function = Func;
RootBridgePciAddress.Device = Device;
RootBridgePciAddress.Bus = Bus;
RootBridgePciAddress.ExtendedRegister = 0;
if (gPciPlatformProtocol != NULL) {
//
// Call PlatformPci::PrepController() if the protocol is present.
//
gPciPlatformProtocol->PlatformPrepController (
gPciPlatformProtocol,
HostBridgeHandle,
RootBridgeHandle,
RootBridgePciAddress,
Phase,
ChipsetEntry
);
}
Status = PciResAlloc->PreprocessController (
PciResAlloc,
RootBridgeHandle,
RootBridgePciAddress,
Phase
);
if (gPciPlatformProtocol != NULL) {
//
// Call PlatformPci::PrepController() if the protocol is present.
//
gPciPlatformProtocol->PlatformPrepController (
gPciPlatformProtocol,
HostBridgeHandle,
RootBridgeHandle,
RootBridgePciAddress,
Phase,
ChipsetExit
);
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PciHotPlugRequestNotify (
IN EFI_PCI_HOTPLUG_REQUEST_PROTOCOL * This,
IN EFI_PCI_HOTPLUG_OPERATION Operation,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL * RemainingDevicePath OPTIONAL,
IN OUT UINT8 *NumberOfChildren,
IN OUT EFI_HANDLE * ChildHandleBuffer
)
/*++
Routine Description:
Hot plug request notify.
Arguments:
This - A pointer to the hot plug request protocol.
Operation - The operation.
Controller - A pointer to the controller.
RemainningDevicePath - A pointer to the device path.
NumberOfChildren - A the number of child handle in the ChildHandleBuffer.
ChildHandleBuffer - A pointer to the array contain the child handle.
Returns:
Status code.
--*/
// TODO: RemainingDevicePath - add argument and description to function comment
// TODO: EFI_NOT_FOUND - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
PCI_IO_DEVICE *Bridge;
PCI_IO_DEVICE *Temp;
EFI_PCI_IO_PROTOCOL *PciIo;
UINTN Index;
EFI_HANDLE RootBridgeHandle;
EFI_STATUS Status;
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
gPciBusDriverBinding.DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
Bridge = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);
//
// Get root bridge handle
//
Temp = Bridge;
while (Temp->Parent) {
Temp = Temp->Parent;
}
RootBridgeHandle = Temp->Handle;
if (Operation == EfiPciHotPlugRequestAdd) {
if (NumberOfChildren != NULL) {
*NumberOfChildren = 0;
}
if (IsListEmpty (&Bridge->ChildList)) {
Status = PciBridgeEnumerator (Bridge);
if (EFI_ERROR (Status)) {
return Status;
}
}
Status = StartPciDevicesOnBridge (
RootBridgeHandle,
Bridge,
RemainingDevicePath,
NumberOfChildren,
ChildHandleBuffer
);
return EFI_SUCCESS;
}
if (Operation == EfiPciHotplugRequestRemove) {
if (*NumberOfChildren == 0) {
//
// Remove all devices on the bridge
//
Status = RemoveAllPciDeviceOnBridge (RootBridgeHandle, Bridge);
return Status;
}
for (Index = 0; Index < *NumberOfChildren; Index++) {
//
// De register all the pci device
//
Status = DeRegisterPciDevice (RootBridgeHandle, ChildHandleBuffer[Index]);
if (EFI_ERROR (Status)) {
return Status;
}
}
//
// End for
//
return EFI_SUCCESS;
}
return EFI_SUCCESS;
}
BOOLEAN
SearchHostBridgeHandle (
IN EFI_HANDLE RootBridgeHandle
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: RootBridgeHandle - add argument and description to function comment
{
EFI_HANDLE HostBridgeHandle;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
UINTN Index;
EFI_STATUS Status;
//
// Get the rootbridge Io protocol to find the host bridge handle
//
Status = gBS->OpenProtocol (
RootBridgeHandle,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **) &PciRootBridgeIo,
gPciBusDriverBinding.DriverBindingHandle,
RootBridgeHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return FALSE;
}
HostBridgeHandle = PciRootBridgeIo->ParentHandle;
for (Index = 0; Index < gPciHostBridgeNumber; Index++) {
if (HostBridgeHandle == gPciHostBrigeHandles[Index]) {
return TRUE;
}
}
return FALSE;
}
EFI_STATUS
AddHostBridgeEnumerator (
IN EFI_HANDLE HostBridgeHandle
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: HostBridgeHandle - add argument and description to function comment
// TODO: EFI_ABORTED - add return value to function comment
// TODO: EFI_ABORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
UINTN Index;
if (!HostBridgeHandle) {
return EFI_ABORTED;
}
for (Index = 0; Index < gPciHostBridgeNumber; Index++) {
if (HostBridgeHandle == gPciHostBrigeHandles[Index]) {
return EFI_ABORTED;
}
}
if (Index < PCI_MAX_HOST_BRIDGE_NUM) {
gPciHostBrigeHandles[Index] = HostBridgeHandle;
gPciHostBridgeNumber++;
}
return EFI_SUCCESS;
}
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