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UefiPayloadPkg ：Update RetrieveMultiSegmentInfoFromHob

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Merge the PCI root bridge with the same segment address within one.
PciSegment element.

UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.c

Signed-off-by: Linus Liu <linus.liu@intel.com>
This commit is contained in:
Linus Liu 2024-11-17 18:15:14 -08:00 committed by mergify[bot]
parent fc140c5eae
commit 105a62d3ac
1 changed files with 66 additions and 13 deletions
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79
UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.c
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@ -41,32 +41,85 @@ RetrieveMultiSegmentInfoFromHob (
OUT UINTN *NumberOfRootBridges
)
{
UINTN Size;
UINT8 Index;
UINTN Size;
UINT8 IndexForExistingSegments;
UINT8 NumberOfExistingSegments;
UINT8 IndexForRb;
PCI_SEGMENT_INFO *pPciSegments;
if (PciRootBridgeInfo == NULL) {
mPciSegments = NULL;
return;
}
IndexForExistingSegments = 0;
NumberOfExistingSegments = 0;
IndexForRb = 0;
Size = PciRootBridgeInfo->Count * sizeof (PCI_SEGMENT_INFO);
*NumberOfRootBridges = PciRootBridgeInfo->Count;
Size = PciRootBridgeInfo->Count * sizeof (PCI_SEGMENT_INFO);
mPciSegments = (PCI_SEGMENT_INFO *)AllocatePool (Size);
ASSERT (mPciSegments != NULL);
ZeroMem (mPciSegments, PciRootBridgeInfo->Count * sizeof (PCI_SEGMENT_INFO));
pPciSegments = (PCI_SEGMENT_INFO *)AllocatePool (Size);
if (pPciSegments == NULL) {
ASSERT (pPciSegments != NULL);
return;
}
ZeroMem (pPciSegments, PciRootBridgeInfo->Count * sizeof (PCI_SEGMENT_INFO));
//
// Create all root bridges with PciRootBridgeInfoHob
// RBs may share the same Segment number, but mPciSegments should not have duplicate segment data.
// 1. if RB Segment is same with existing one, update StartBus and EndBus of existing one
// 2. if RB Segment is different from all existing ones, add it to the existing Segments data buffer.
// pPciSegments is local temporary data buffer that will be freed later (size depends on numbers of RB)
// mPciSegments is global data that will be updated with the pPciSegments for caller to utilize. (size depends on numbers of different PciSegments)
//
for (Index = 0; Index < PciRootBridgeInfo->Count; Index++) {
if (UplSegmentInfo->SegmentInfo[Index].SegmentNumber == (UINT16)(PciRootBridgeInfo->RootBridge[Index].Segment)) {
mPciSegments[Index].BaseAddress = UplSegmentInfo->SegmentInfo[Index].BaseAddress;
NumberOfExistingSegments = 1;
pPciSegments[0].BaseAddress = UplSegmentInfo->SegmentInfo[0].BaseAddress;
pPciSegments[0].SegmentNumber = (UINT16)(PciRootBridgeInfo->RootBridge[0].Segment);
pPciSegments[0].StartBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[0].Bus.Base;
pPciSegments[0].EndBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[0].Bus.Limit;
for (IndexForRb = 1; IndexForRb < PciRootBridgeInfo->Count; IndexForRb++) {
for (IndexForExistingSegments = 0; IndexForExistingSegments < NumberOfExistingSegments; IndexForExistingSegments++) {
if (pPciSegments[IndexForExistingSegments].SegmentNumber == PciRootBridgeInfo->RootBridge[IndexForRb].Segment) {
if (pPciSegments[IndexForExistingSegments].StartBusNumber > PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Base) {
pPciSegments[IndexForExistingSegments].StartBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Base;
}
if (pPciSegments[IndexForExistingSegments].EndBusNumber < PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Limit) {
pPciSegments[IndexForExistingSegments].EndBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Limit;
}
break; // breaking after a match found
}
}
mPciSegments[Index].SegmentNumber = (UINT16)(PciRootBridgeInfo->RootBridge[Index].Segment);
mPciSegments[Index].StartBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[Index].Bus.Base;
mPciSegments[Index].EndBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[Index].Bus.Limit;
if (IndexForExistingSegments >= NumberOfExistingSegments) {
//
// No match found, add it to segments data buffer
//
pPciSegments[NumberOfExistingSegments].BaseAddress = UplSegmentInfo->SegmentInfo[IndexForRb].BaseAddress;
pPciSegments[NumberOfExistingSegments].SegmentNumber = (UINT16)(PciRootBridgeInfo->RootBridge[IndexForRb].Segment);
pPciSegments[NumberOfExistingSegments].StartBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Base;
pPciSegments[NumberOfExistingSegments].EndBusNumber = (UINT8)PciRootBridgeInfo->RootBridge[IndexForRb].Bus.Limit;
NumberOfExistingSegments++;
}
}
//
// Prepare data for returning to caller
//
*NumberOfRootBridges = NumberOfExistingSegments;
Size = NumberOfExistingSegments * sizeof (PCI_SEGMENT_INFO);
mPciSegments = (PCI_SEGMENT_INFO *)AllocatePool (Size);
if (mPciSegments == NULL) {
ASSERT (FALSE);
return;
}
CopyMem (&mPciSegments[0], &pPciSegments[0], Size);
if (pPciSegments != NULL) {
FreePool (pPciSegments);
}
return;