Currently we only connect the root bus with bus number 0, by device path.
Soon we will possibly have several extra root buses, so connect all root
buses up-front (bus number zero and otherwise), by protocol GUID.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <ler...@redhat.com>
---
OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf | 2 +-
OvmfPkg/Library/PlatformBdsLib/BdsPlatform.h | 25 +--------
OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c | 53 ++++++--------------
OvmfPkg/Library/PlatformBdsLib/PlatformData.c | 13 -----
4 files changed, 18 insertions(+), 75 deletions(-)
diff --git a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
index 5a28d78..ce29720 100644
--- a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
+++ b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
@@ -64,4 +64,4 @@
[Protocols]
gEfiDecompressProtocolGuid
-
+ gEfiPciRootBridgeIoProtocolGuid
diff --git a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.h
b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.h
index 7006fb3..e3e950e 100644
--- a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.h
+++ b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.h
@@ -52,6 +52,7 @@ Abstract:
#include <Protocol/PciIo.h>
#include <Protocol/FirmwareVolume2.h>
#include <Protocol/SimpleFileSystem.h>
+#include <Protocol/PciRootBridgeIo.h>
#include <Guid/Acpi.h>
#include <Guid/SmBios.h>
@@ -64,7 +65,6 @@ Abstract:
extern BDS_CONSOLE_CONNECT_ENTRY gPlatformConsole[];
extern EFI_DEVICE_PATH_PROTOCOL *gPlatformConnectSequence[];
extern EFI_DEVICE_PATH_PROTOCOL *gPlatformDriverOption[];
-extern EFI_DEVICE_PATH_PROTOCOL *gPlatformRootBridges[];
extern ACPI_HID_DEVICE_PATH gPnpPs2KeyboardDeviceNode;
extern ACPI_HID_DEVICE_PATH gPnp16550ComPortDeviceNode;
extern UART_DEVICE_PATH gUartDeviceNode;
@@ -107,9 +107,6 @@ extern VENDOR_DEVICE_PATH gTerminalTypeDeviceNode;
0 \
}
-#define gPciRootBridge \
- PNPID_DEVICE_PATH_NODE(0x0A03)
-
#define gPciIsaBridge \
PCI_DEVICE_PATH_NODE(0, 0x1f)
@@ -152,16 +149,6 @@ extern VENDOR_DEVICE_PATH gTerminalTypeDeviceNode;
DEVICE_PATH_MESSAGING_PC_ANSI \
}
-#define gEndEntire \
- { \
- END_DEVICE_PATH_TYPE, \
- END_ENTIRE_DEVICE_PATH_SUBTYPE, \
- { \
- END_DEVICE_PATH_LENGTH, \
- 0 \
- } \
- }
-
#define PCI_CLASS_SCC 0x07
#define PCI_SUBCLASS_SERIAL 0x00
#define PCI_IF_16550 0x02
@@ -172,14 +159,6 @@ extern VENDOR_DEVICE_PATH gTerminalTypeDeviceNode;
#define IS_PCI_ISA_PDECODE(_p) IS_CLASS3 (_p, PCI_CLASS_BRIDGE,
PCI_CLASS_BRIDGE_ISA_PDECODE, 0)
-//
-// Platform Root Bridge
-//
-typedef struct {
- ACPI_HID_DEVICE_PATH PciRootBridge;
- EFI_DEVICE_PATH_PROTOCOL End;
-} PLATFORM_ROOT_BRIDGE_DEVICE_PATH;
-
typedef struct {
ACPI_HID_DEVICE_PATH PciRootBridge;
PCI_DEVICE_PATH IsaBridge;
@@ -223,8 +202,6 @@ typedef struct {
EFI_DEVICE_PATH_PROTOCOL End;
} USB_CLASS_FORMAT_DEVICE_PATH;
-extern PLATFORM_ROOT_BRIDGE_DEVICE_PATH gPlatformRootBridge0;
-
//
// Platform BDS Functions
//
diff --git a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
index e521f45..2254077 100644
--- a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
@@ -116,49 +116,27 @@ Returns:
EFI_STATUS
+EFIAPI
ConnectRootBridge (
- VOID
+ IN EFI_HANDLE RootBridgeHandle,
+ IN VOID *Instance,
+ IN VOID *Context
)
-/*++
-
-Routine Description:
-
- Connect RootBridge
-
-Arguments:
-
- None.
-
-Returns:
-
- EFI_SUCCESS - Connect RootBridge successfully.
- EFI_STATUS - Connect RootBridge fail.
-
---*/
{
- EFI_STATUS Status;
- EFI_HANDLE RootHandle;
+ EFI_STATUS Status;
//
- // Make all the PCI_IO protocols on PCI Seg 0 show up
+ // Make the PCI bus driver connect the root bridge, non-recursively. This
+ // will produce a number of child handles with PciIo on them.
//
- BdsLibConnectDevicePath (gPlatformRootBridges[0]);
-
- Status = gBS->LocateDevicePath (
- &gEfiDevicePathProtocolGuid,
- &gPlatformRootBridges[0],
- &RootHandle
+ Status = gBS->ConnectController (
+ RootBridgeHandle, // ControllerHandle
+ NULL, // DriverImageHandle
+ NULL, // RemainingDevicePath -- produce all
+ // children
+ FALSE // Recursive
);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = gBS->ConnectController (RootHandle, NULL, NULL, FALSE);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- return EFI_SUCCESS;
+ return Status;
}
@@ -1216,7 +1194,8 @@ Returns:
DEBUG ((EFI_D_INFO, "PlatformBdsPolicyBehavior\n"));
- ConnectRootBridge ();
+ VisitAllInstancesOfProtocol (&gEfiPciRootBridgeIoProtocolGuid,
+ ConnectRootBridge, NULL);
if (PcdGetBool (PcdOvmfFlashVariablesEnable)) {
DEBUG ((EFI_D_INFO, "PlatformBdsPolicyBehavior: not restoring NvVars "
diff --git a/OvmfPkg/Library/PlatformBdsLib/PlatformData.c
b/OvmfPkg/Library/PlatformBdsLib/PlatformData.c
index 1a30531..f69c1a8 100644
--- a/OvmfPkg/Library/PlatformBdsLib/PlatformData.c
+++ b/OvmfPkg/Library/PlatformBdsLib/PlatformData.c
@@ -26,19 +26,6 @@ UART_DEVICE_PATH gUartDeviceNode =
gUart;
VENDOR_DEVICE_PATH gTerminalTypeDeviceNode = gPcAnsiTerminal;
//
-// Predefined platform root bridge
-//
-PLATFORM_ROOT_BRIDGE_DEVICE_PATH gPlatformRootBridge0 = {
- gPciRootBridge,
- gEndEntire
-};
-
-EFI_DEVICE_PATH_PROTOCOL *gPlatformRootBridges[] = {
- (EFI_DEVICE_PATH_PROTOCOL *) &gPlatformRootBridge0,
- NULL
-};
-
-//
// Platform specific keyboard device path
//
--
1.8.3.1
------------------------------------------------------------------------------
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