+++ /dev/null
-/** @file\r
- Driver Binding functions for PCI Bus module.\r
-\r
- Single PCI bus driver instance will manager all PCI Root Bridges in one EFI based firmware,\r
- since all PCI Root Bridges' resources need to be managed together.\r
- Supported() function will try to get PCI Root Bridge IO Protocol.\r
- Start() function will get PCI Host Bridge Resource Allocation Protocol to manage all\r
- PCI Root Bridges. So it means platform needs install PCI Root Bridge IO protocol for each\r
- PCI Root Bus and install PCI Host Bridge Resource Allocation Protocol.\r
-\r
-Copyright (c) 2006 - 2009, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
-are licensed and made available under the terms and conditions of the BSD License\r
-which accompanies this distribution. The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
-\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
-\r
-#include "PciBus.h"\r
-\r
-//\r
-// PCI Bus Driver Global Variables\r
-//\r
-EFI_DRIVER_BINDING_PROTOCOL gPciBusDriverBinding = {\r
- PciBusDriverBindingSupported,\r
- PciBusDriverBindingStart,\r
- PciBusDriverBindingStop,\r
- 0xa,\r
- NULL,\r
- NULL\r
-};\r
-\r
-EFI_HANDLE gPciHostBrigeHandles[PCI_MAX_HOST_BRIDGE_NUM];\r
-EFI_INCOMPATIBLE_PCI_DEVICE_SUPPORT_PROTOCOL *gEfiIncompatiblePciDeviceSupport = NULL;\r
-UINTN gPciHostBridgeNumber = 0;\r
-BOOLEAN gFullEnumeration = TRUE;\r
-UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;\r
-UINT64 gAllZero = 0;\r
-\r
-EFI_PCI_PLATFORM_PROTOCOL *gPciPlatformProtocol;\r
-\r
-GLOBAL_REMOVE_IF_UNREFERENCED EFI_PCI_HOTPLUG_REQUEST_PROTOCOL mPciHotPlugRequest = {\r
- PciHotPlugRequestNotify\r
-};\r
-\r
-/**\r
- The Entry Point for PCI Bus module. The user code starts with this function.\r
-\r
- Installs driver module protocols and. Creates virtual device handles for ConIn,\r
- ConOut, and StdErr. Installs Simple Text In protocol, Simple Text In Ex protocol,\r
- Simple Pointer protocol, Absolute Pointer protocol on those virtual handlers.\r
- Installs Graphics Output protocol and/or UGA Draw protocol if needed.\r
-\r
- @param[in] ImageHandle The firmware allocated handle for the EFI image.\r
- @param[in] SystemTable A pointer to the EFI System Table.\r
-\r
- @retval EFI_SUCCESS The entry point is executed successfully.\r
- @retval other Some error occurred when executing this entry point.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-PciBusEntryPoint (\r
- IN EFI_HANDLE ImageHandle,\r
- IN EFI_SYSTEM_TABLE *SystemTable\r
- )\r
-{\r
- EFI_STATUS Status;\r
- EFI_HANDLE Handle;\r
-\r
- //\r
- // Initializes PCI devices pool\r
- //\r
- InitializePciDevicePool ();\r
-\r
- //\r
- // Install driver model protocol(s).\r
- //\r
- Status = EfiLibInstallDriverBindingComponentName2 (\r
- ImageHandle,\r
- SystemTable,\r
- &gPciBusDriverBinding,\r
- ImageHandle,\r
- &gPciBusComponentName,\r
- &gPciBusComponentName2\r
- );\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- if (FeaturePcdGet (PcdPciBusHotplugDeviceSupport)) {\r
- //\r
- // If Hot Plug is supported, install EFI PCI Hot Plug Request protocol.\r
- //\r
- Handle = NULL;\r
- Status = gBS->InstallProtocolInterface (\r
- &Handle,\r
- &gEfiPciHotPlugRequestProtocolGuid,\r
- EFI_NATIVE_INTERFACE,\r
- &mPciHotPlugRequest\r
- );\r
- }\r
-\r
- return Status;\r
-}\r
-\r
-/**\r
- Test to see if this driver supports ControllerHandle. Any ControllerHandle\r
- than contains a gEfiPciRootBridgeIoProtocolGuid protocol can be supported.\r
-\r
- @param This Protocol instance pointer.\r
- @param Controller Handle of device to test.\r
- @param RemainingDevicePath Optional parameter use to pick a specific child.\r
- device to start.\r
-\r
- @retval EFI_SUCCESS This driver supports this device.\r
- @retval EFI_ALREADY_STARTED This driver is already running on this device.\r
- @retval other This driver does not support this device.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-PciBusDriverBindingSupported (\r
- IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
- IN EFI_HANDLE Controller,\r
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
- )\r
-{\r
- EFI_STATUS Status;\r
- EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
- EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
- EFI_DEV_PATH_PTR Node;\r
-\r
- //\r
- // Check RemainingDevicePath validation\r
- //\r
- if (RemainingDevicePath != NULL) {\r
- //\r
- // Check if RemainingDevicePath is the End of Device Path Node, \r
- // if yes, go on checking other conditions\r
- //\r
- if (!IsDevicePathEnd (RemainingDevicePath)) {\r
- //\r
- // If RemainingDevicePath isn't the End of Device Path Node,\r
- // check its validation\r
- //\r
- Node.DevPath = RemainingDevicePath;\r
- if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||\r
- Node.DevPath->SubType != HW_PCI_DP ||\r
- DevicePathNodeLength(Node.DevPath) != sizeof(PCI_DEVICE_PATH)) {\r
- return EFI_UNSUPPORTED;\r
- }\r
- }\r
- }\r
-\r
- //\r
- // Check if Pci Root Bridge IO protocol is installed by platform\r
- //\r
- Status = gBS->OpenProtocol (\r
- Controller,\r
- &gEfiPciRootBridgeIoProtocolGuid,\r
- (VOID **) &PciRootBridgeIo,\r
- This->DriverBindingHandle,\r
- Controller,\r
- EFI_OPEN_PROTOCOL_BY_DRIVER\r
- );\r
- if (Status == EFI_ALREADY_STARTED) {\r
- return EFI_SUCCESS;\r
- }\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- //\r
- // Close the I/O Abstraction(s) used to perform the supported test\r
- //\r
- gBS->CloseProtocol (\r
- Controller,\r
- &gEfiPciRootBridgeIoProtocolGuid,\r
- This->DriverBindingHandle,\r
- Controller\r
- );\r
-\r
- //\r
- // Open the EFI Device Path protocol needed to perform the supported test\r
- //\r
- Status = gBS->OpenProtocol (\r
- Controller,\r
- &gEfiDevicePathProtocolGuid,\r
- (VOID **) &ParentDevicePath,\r
- This->DriverBindingHandle,\r
- Controller,\r
- EFI_OPEN_PROTOCOL_BY_DRIVER\r
- );\r
- if (Status == EFI_ALREADY_STARTED) {\r
- return EFI_SUCCESS;\r
- }\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- //\r
- // Close protocol, don't use device path protocol in the Support() function\r
- //\r
- gBS->CloseProtocol (\r
- Controller,\r
- &gEfiDevicePathProtocolGuid,\r
- This->DriverBindingHandle,\r
- Controller\r
- );\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- Start this driver on ControllerHandle and enumerate Pci bus and start\r
- all device under PCI bus.\r
-\r
- @param This Protocol instance pointer.\r
- @param Controller Handle of device to bind driver to.\r
- @param RemainingDevicePath Optional parameter use to pick a specific child.\r
- device to start.\r
-\r
- @retval EFI_SUCCESS This driver is added to ControllerHandle.\r
- @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle.\r
- @retval other This driver does not support this device.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-PciBusDriverBindingStart (\r
- IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
- IN EFI_HANDLE Controller,\r
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
- )\r
-{\r
- EFI_STATUS Status;\r
-\r
- //\r
- // Check RemainingDevicePath validation\r
- //\r
- if (RemainingDevicePath != NULL) {\r
- //\r
- // Check if RemainingDevicePath is the End of Device Path Node, \r
- // if yes, return EFI_SUCCESS\r
- //\r
- if (IsDevicePathEnd (RemainingDevicePath)) {\r
- return EFI_SUCCESS;\r
- }\r
- }\r
-\r
- Status = gBS->LocateProtocol (\r
- &gEfiIncompatiblePciDeviceSupportProtocolGuid,\r
- NULL,\r
- (VOID **) &gEfiIncompatiblePciDeviceSupport\r
- );\r
-\r
- //\r
- // If PCI Platform protocol is available, get it now.\r
- // If the platform implements this, it must be installed before BDS phase\r
- //\r
- gPciPlatformProtocol = NULL;\r
- gBS->LocateProtocol (\r
- &gEfiPciPlatformProtocolGuid,\r
- NULL,\r
- (VOID **) &gPciPlatformProtocol\r
- );\r
-\r
- gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r
-\r
- //\r
- // Enumerate the entire host bridge\r
- // After enumeration, a database that records all the device information will be created\r
- //\r
- //\r
- Status = PciEnumerator (Controller);\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- //\r
- // Start all the devices under the entire host bridge.\r
- //\r
- StartPciDevices (Controller);\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- Stop this driver on ControllerHandle. Support stoping any child handles\r
- created by this driver.\r
-\r
- @param This Protocol instance pointer.\r
- @param Controller Handle of device to stop driver on.\r
- @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r
- children is zero stop the entire bus driver.\r
- @param ChildHandleBuffer List of Child Handles to Stop.\r
-\r
- @retval EFI_SUCCESS This driver is removed ControllerHandle.\r
- @retval other This driver was not removed from this device.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-PciBusDriverBindingStop (\r
- IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
- IN EFI_HANDLE Controller,\r
- IN UINTN NumberOfChildren,\r
- IN EFI_HANDLE *ChildHandleBuffer\r
- )\r
-{\r
- EFI_STATUS Status;\r
- UINTN Index;\r
- BOOLEAN AllChildrenStopped;\r
-\r
- if (NumberOfChildren == 0) {\r
- //\r
- // Close the bus driver\r
- //\r
- gBS->CloseProtocol (\r
- Controller,\r
- &gEfiDevicePathProtocolGuid,\r
- This->DriverBindingHandle,\r
- Controller\r
- );\r
- gBS->CloseProtocol (\r
- Controller,\r
- &gEfiPciRootBridgeIoProtocolGuid,\r
- This->DriverBindingHandle,\r
- Controller\r
- );\r
-\r
- DestroyRootBridgeByHandle (\r
- Controller\r
- );\r
-\r
- return EFI_SUCCESS;\r
- }\r
-\r
- //\r
- // Stop all the children\r
- //\r
-\r
- AllChildrenStopped = TRUE;\r
-\r
- for (Index = 0; Index < NumberOfChildren; Index++) {\r
-\r
- //\r
- // De register all the pci device\r
- //\r
- Status = DeRegisterPciDevice (Controller, ChildHandleBuffer[Index]);\r
-\r
- if (EFI_ERROR (Status)) {\r
- AllChildrenStopped = FALSE;\r
- }\r
- }\r
-\r
- if (!AllChildrenStopped) {\r
- return EFI_DEVICE_ERROR;\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
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