[edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 05/15] MdeModulePkg/PciBusDxe: Locate PciePlatform/PcieOverride protocol
Javeed, Ashraf
ashraf.javeed at intel.com
Sun May 10 16:14:02 UTC 2020
REF:
https://bugzilla.tianocore.org/show_bug.cgi?id=1954
https://bugzilla.tianocore.org/show_bug.cgi?id=2194
https://bugzilla.tianocore.org/show_bug.cgi?id=2313
https://bugzilla.tianocore.org/show_bug.cgi?id=2499
https://bugzilla.tianocore.org/show_bug.cgi?id=2500
Signed-off-by: Ashraf Javeed <ashraf.javeed at intel.com>
Signed-off-by: Ray Ni <ray.ni at intel.com>
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Hao A Wu <hao.a.wu at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Ashraf Javeed <ashraf.javeed at intel.com>
---
MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c | 5 +++++
MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h | 1 +
MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf | 2 ++
MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.h | 25 +++++++++++++++++++++++++
5 files changed, 77 insertions(+)
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
index 53e6dfa..a139bed 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
@@ -285,6 +285,11 @@ PciBusDriverBindingStart (
);
}
+ //
+ // get the PCI Express Protocol or the PCI Express Override Protocol
+ //
+ InitializePciExpressProtocols ();
+
if (mIoMmuProtocol == NULL) {
gBS->LocateProtocol (
&gEdkiiIoMmuProtocolGuid,
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
index 9947203..ccf9ffa 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
@@ -82,6 +82,7 @@ typedef enum {
#include "PciPowerManagement.h"
#include "PciHotPlugSupport.h"
#include "PciLib.h"
+#include "PcieFeatureSupport.h"
#define VGABASE1 0x3B0
#define VGALIMIT1 0x3BB
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
index 3b1559e..0818153 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
@@ -57,6 +57,8 @@
PciCommand.h
PciIo.h
PciBus.h
+ PcieFeatureSupport.c
+ PcieFeatureSupport.h
[Packages]
MdePkg/MdePkg.dec
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.c
new file mode 100644
index 0000000..13d0e0b
--- /dev/null
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.c
@@ -0,0 +1,44 @@
+/** @file
+ PCI standard feature support functions implementation for PCI Bus module..
+
+Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "PciBus.h"
+#include "PcieFeatureSupport.h"
+EFI_PCI_EXPRESS_PLATFORM_PROTOCOL *mPciePlatformProtocol;
+
+/**
+ This function retrieves the PCI Express Platform Protocols published by platform
+ @retval EFI_STATUS direct return status from the LocateProtocol ()
+ boot service for the PCI Express Override Protocol.
+ EFI_SUCCESS The PCI Express Platform Protocol is found.
+**/
+EFI_STATUS
+InitializePciExpressProtocols (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+
+ Status = gBS->LocateProtocol (
+ &gEfiPciExpressPlatformProtocolGuid,
+ NULL,
+ (VOID **) &mPciePlatformProtocol
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // If PCI Express Platform protocol doesn't exist, try to get the Pci Express
+ // Override Protocol and treat it as PCI Express Platform protocol.
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiPciExpressOverrideProtocolGuid,
+ NULL,
+ (VOID **) &mPciePlatformProtocol
+ );
+ }
+ return Status;
+}
+
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.h
new file mode 100644
index 0000000..5d15e0a
--- /dev/null
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PcieFeatureSupport.h
@@ -0,0 +1,25 @@
+/** @file
+ PCI standard feature support functions implementation for PCI Bus module..
+
+Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __PCIE_FEATURE_SUPPORT_H__
+#define __PCIE_FEATURE_SUPPORT_H__
+
+extern EFI_PCI_EXPRESS_PLATFORM_PROTOCOL *mPciePlatformProtocol;
+/**
+ This function retrieves the PCI Express Platform Protocols published by platform
+ @retval EFI_STATUS direct return status from the LocateProtocol ()
+ boot service for the PCI Express Override Protocol
+ EFI_SUCCESS The PCI Express Platform Protocol is found
+**/
+EFI_STATUS
+InitializePciExpressProtocols (
+ VOID
+ );
+
+
+#endif
--
2.21.0.windows.1
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