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MdeModulePkg/PciBus: Accept Spec values as BarIndex and Alignment 

PI spec IncompatiblePciSupport part defines (UINT64)-1 as all BARs
and 0 to use existing alignment. PciBus driver didn't accept these
values. It treated 0xFF as all BARs and 0xFFFFFFFFFFFFFFFFULL to use
existing alignment.
The patch changes the code to still accept old values while also
accept values defined in PI spec. So that the driver can provide
backward compatibility and follow spec.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Ruiyu Ni 2017-01-25 15:55:55 +08:00
parent 9b64832379
commit 8a93fa1efb
1 changed files with 22 additions and 14 deletions
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36
MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
View File

@ -1,7 +1,7 @@
/** @file
PCI emumeration support functions implementation for PCI Bus module.
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -17,6 +17,11 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
extern CHAR16 *mBarTypeStr[];
#define OLD_ALIGN 0xFFFFFFFFFFFFFFFFULL
#define EVEN_ALIGN 0xFFFFFFFFFFFFFFFEULL
#define SQUAD_ALIGN 0xFFFFFFFFFFFFFFFDULL
#define DQUAD_ALIGN 0xFFFFFFFFFFFFFFFCULL
/**
This routine is used to check whether the pci device is present.
@ -1335,8 +1340,8 @@ UpdatePciInfo (
)
{
EFI_STATUS Status;
UINTN BarIndex;
UINTN BarEndIndex;
UINT64 BarIndex;
UINT64 BarEndIndex;
BOOLEAN SetFlag;
VOID *Configuration;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Ptr;
@ -1390,18 +1395,19 @@ UpdatePciInfo (
break;
}
BarIndex = (UINTN) Ptr->AddrTranslationOffset;
BarIndex = Ptr->AddrTranslationOffset;
BarEndIndex = BarIndex;
//
// Update all the bars in the device
// Compare against 0xFF is to keep backward compatibility.
//
if (BarIndex == PCI_BAR_ALL) {
if ((BarIndex == MAX_UINT64) || (BarIndex == 0xFF)) {
BarIndex = 0;
BarEndIndex = PCI_MAX_BAR - 1;
}
if (BarIndex > PCI_MAX_BAR) {
if (BarIndex >= PCI_MAX_BAR) {
Ptr++;
continue;
}
@ -1472,7 +1478,7 @@ UpdatePciInfo (
//
// Update the new length for the device
//
if (Ptr->AddrLen != PCI_BAR_NOCHANGE) {
if (Ptr->AddrLen != 0) {
PciIoDevice->PciBar[BarIndex].Length = Ptr->AddrLen;
}
}
@ -1488,6 +1494,8 @@ UpdatePciInfo (
/**
This routine will update the alignment with the new alignment.
Compare with OLD_ALIGN/EVEN_ALIGN/SQUAD_ALIGN/DQUAD_ALIGN is to keep
backward compatibility.
@param Alignment Input Old alignment. Output updated alignment.
@param NewAlignment New alignment.
@ -1506,15 +1514,15 @@ SetNewAlign (
// The new alignment is the same as the original,
// so skip it
//
if (NewAlignment == PCI_BAR_OLD_ALIGN) {
if ((NewAlignment == 0) || (NewAlignment == OLD_ALIGN)) {
return ;
}
//
// Check the validity of the parameter
//
if (NewAlignment != PCI_BAR_EVEN_ALIGN &&
NewAlignment != PCI_BAR_SQUAD_ALIGN &&
NewAlignment != PCI_BAR_DQUAD_ALIGN ) {
if (NewAlignment != EVEN_ALIGN &&
NewAlignment != SQUAD_ALIGN &&
NewAlignment != DQUAD_ALIGN ) {
*Alignment = NewAlignment;
return ;
}
@ -1533,15 +1541,15 @@ SetNewAlign (
//
// Adjust the alignment to even, quad or double quad boundary
//
if (NewAlignment == PCI_BAR_EVEN_ALIGN) {
if (NewAlignment == EVEN_ALIGN) {
if ((OldAlignment & 0x01) != 0) {
OldAlignment = OldAlignment + 2 - (OldAlignment & 0x01);
}
} else if (NewAlignment == PCI_BAR_SQUAD_ALIGN) {
} else if (NewAlignment == SQUAD_ALIGN) {
if ((OldAlignment & 0x03) != 0) {
OldAlignment = OldAlignment + 4 - (OldAlignment & 0x03);
}
} else if (NewAlignment == PCI_BAR_DQUAD_ALIGN) {
} else if (NewAlignment == DQUAD_ALIGN) {
if ((OldAlignment & 0x07) != 0) {
OldAlignment = OldAlignment + 8 - (OldAlignment & 0x07);
}