[edk2-devel] [PATCH v1 1/1] UefiPayloadPkg: Scan for PCI devices after end of DXE
Marcello Sylvester Bauer
marcello.bauer at 9elements.com
Thu Jul 16 11:10:10 UTC 2020
From: Patrick Rudolph <patrick.rudolph at 9elements.com>
This allows EFI applications to iterate over those devices.
An example is iPXE.efi that requires those devices to be present.
Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
Signed-off-by: Marcello Sylvester Bauer <marcello.bauer at 9elements.com>
Cc: Patrick Rudolph <patrick.rudolph at 9elements.com>
Cc: Christian Walter <christian.walter at 9elements.com>
Cc: Maurice Ma <maurice.ma at intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Cc: Star Zeng <star.zeng at intel.com>
---
UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf | 1 +
UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c | 76 ++++++++++++++++++++
2 files changed, 77 insertions(+)
diff --git a/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf b/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
index 1f5a0bcad038..a7c6bc2d6440 100644
--- a/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
+++ b/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
@@ -57,6 +57,7 @@ [Protocols]
gEfiBootLogoProtocolGuid ## CONSUMES
gEfiDxeSmmReadyToLockProtocolGuid
gEfiSmmAccess2ProtocolGuid
+ gEfiPciRootBridgeIoProtocolGuid ## CONSUMES
[Pcd]
gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut
diff --git a/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c b/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c
index c5c6af0abcb2..ff7df53231ce 100644
--- a/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c
+++ b/UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c
@@ -138,6 +138,79 @@ PlatformRegisterFvBootOption (
}
}
+STATIC
+EFI_STATUS
+VisitAllInstancesOfProtocol (
+ IN EFI_GUID *Id,
+ IN PROTOCOL_INSTANCE_CALLBACK CallBackFunction,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ UINTN HandleCount;
+ EFI_HANDLE *HandleBuffer;
+ UINTN Index;
+ VOID *Instance;
+
+ //
+ // Start to check all the PciIo to find all possible device
+ //
+ HandleCount = 0;
+ HandleBuffer = NULL;
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ Id,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->HandleProtocol (HandleBuffer[Index], Id, &Instance);
+ if (EFI_ERROR (Status)) {
+ continue;
+ }
+
+ Status = (*CallBackFunction) (
+ HandleBuffer[Index],
+ Instance,
+ Context
+ );
+ }
+
+ gBS->FreePool (HandleBuffer);
+
+ return EFI_SUCCESS;
+}
+
+STATIC
+EFI_STATUS
+EFIAPI
+ConnectRootBridge (
+ IN EFI_HANDLE RootBridgeHandle,
+ IN VOID *Instance,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Make the PCI bus driver connect the root bridge, non-recursively. This
+ // will produce a number of child handles with PciIo on them.
+ //
+ Status = gBS->ConnectController (
+ RootBridgeHandle, // ControllerHandle
+ NULL, // DriverImageHandle
+ NULL, // RemainingDevicePath -- produce all
+ // children
+ FALSE // Recursive
+ );
+ return Status;
+}
+
/**
Do the platform specific action before the console is connected.
@@ -157,6 +230,9 @@ PlatformBootManagerBeforeConsole (
EFI_INPUT_KEY Down;
EFI_BOOT_MANAGER_LOAD_OPTION BootOption;
+ VisitAllInstancesOfProtocol (&gEfiPciRootBridgeIoProtocolGuid,
+ ConnectRootBridge, NULL);
+
PlatformConsoleInit ();
//
--
2.27.0
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