REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2335
This patch is to check the PCI Memory Base Address Register is valid or not.
*** a\NetworkPkg\SnpDxe\Snp.c 2019-11-11 16:53:40.773300500 +0530
--- b\NetworkPkg\SnpDxe\Snp.c 2019-11-03
18:46:02.000000000 +0530
*************** SimpleNetworkDriverStart (
*** 266,272 ****
UINT8 BarIndex;
PXE_STATFLAGS InitStatFlags;
EFI_PCI_IO_PROTOCOL *PciIo;
! EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR *BarDesc = NULL;
BOOLEAN FoundIoBar;
BOOLEAN FoundMemoryBar;
--- 266,272 ----
UINT8 BarIndex;
PXE_STATFLAGS InitStatFlags;
EFI_PCI_IO_PROTOCOL *PciIo;
! EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *BarDesc;
BOOLEAN FoundIoBar;
BOOLEAN FoundMemoryBar;
*************** SimpleNetworkDriverStart (
*** 481,494 ****
} else if (EFI_ERROR (Status)) {
goto Error_DeleteSNP;
}
! //PXE boot fails with cards having non-continuous BAR.
! // From UEFI Spec, GetBarAttributes can have only descriptors of
type ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR
! // and ACPI_END_TAG_DESCRIPTOR.
! if( BarDesc->Header.Header.Byte != ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR )
{
! FreePool (BarDesc);
! continue;
! }
!
if ((!FoundMemoryBar) && (BarDesc->ResType ==
ACPI_ADDRESS_SPACE_TYPE_MEM)) {
Snp->MemoryBarIndex = BarIndex;
FoundMemoryBar = TRUE;
--- 481,487 ----
} else if (EFI_ERROR (Status)) {
goto Error_DeleteSNP;
}
!
if ((!FoundMemoryBar) && (BarDesc->ResType ==
ACPI_ADDRESS_SPACE_TYPE_MEM)) {
Snp->MemoryBarIndex = BarIndex;
FoundMemoryBar = TRUE;
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