[mirror_edk2.git] / MdeModulePkg / Bus / Pci / PciBusDxe / PciBus.c

/** @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 - 2019, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\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  *gIncompatiblePciDeviceSupport = 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
EFI_PCI_OVERRIDE_PROTOCOL       *gPciOverrideProtocol;\r
EDKII_IOMMU_PROTOCOL            *mIoMmuProtocol;\r
EDKII_DEVICE_SECURITY_PROTOCOL  *mDeviceSecurityProtocol;\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
      {\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
  EFI_DEVICE_PATH_PROTOCOL         *ParentDevicePath;\r
  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *PciRootBridgeIo;\r
\r
  //\r
  // Initialize PciRootBridgeIo to suppress incorrect compiler warning.\r
  //\r
  PciRootBridgeIo = NULL;\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
  gBS->LocateProtocol (\r
         &gEfiIncompatiblePciDeviceSupportProtocolGuid,\r
         NULL,\r
         (VOID **)&gIncompatiblePciDeviceSupport\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
  //\r
  // If PCI Platform protocol doesn't exist, try to Pci Override Protocol.\r
  //\r
  if (gPciPlatformProtocol == NULL) {\r
    gPciOverrideProtocol = NULL;\r
    gBS->LocateProtocol (\r
           &gEfiPciOverrideProtocolGuid,\r
           NULL,\r
           (VOID **)&gPciOverrideProtocol\r
           );\r
  }\r
\r
  if (mIoMmuProtocol == NULL) {\r
    gBS->LocateProtocol (\r
           &gEdkiiIoMmuProtocolGuid,\r
           NULL,\r
           (VOID **)&mIoMmuProtocol\r
           );\r
  }\r
\r
  if (mDeviceSecurityProtocol == NULL) {\r
    gBS->LocateProtocol (\r
           &gEdkiiDeviceSecurityProtocolGuid,\r
           NULL,\r
           (VOID **)&mDeviceSecurityProtocol\r
           );\r
  }\r
\r
  if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r
    gFullEnumeration = FALSE;\r
  } else {\r
    gFullEnumeration = (BOOLEAN)((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r
  }\r
\r
  //\r
  // Open Device Path Protocol for PCI root bridge\r
  //\r
  Status = gBS->OpenProtocol (\r
                  Controller,\r
                  &gEfiDevicePathProtocolGuid,\r
                  (VOID **)&ParentDevicePath,\r
                  This->DriverBindingHandle,\r
                  Controller,\r
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Report Status Code to indicate PCI bus starts\r
  //\r
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
    EFI_PROGRESS_CODE,\r
    (EFI_IO_BUS_PCI | EFI_IOB_PC_INIT),\r
    ParentDevicePath\r
    );\r
\r
  Status = EFI_SUCCESS;\r
  //\r
  // Enumerate the entire host bridge\r
  // After enumeration, a database that records all the device information will be created\r
  //\r
  //\r
  if (gFullEnumeration) {\r
    //\r
    // Get the rootbridge Io protocol to find the host bridge handle\r
    //\r
    Status = gBS->OpenProtocol (\r
                    Controller,\r
                    &gEfiPciRootBridgeIoProtocolGuid,\r
                    (VOID **)&PciRootBridgeIo,\r
                    gPciBusDriverBinding.DriverBindingHandle,\r
                    Controller,\r
                    EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                    );\r
\r
    if (!EFI_ERROR (Status)) {\r
      Status = PciEnumerator (Controller, PciRootBridgeIo->ParentHandle);\r
    }\r
  } else {\r
    //\r
    // If PCI bus has already done the full enumeration, never do it again\r
    //\r
    Status = PciEnumeratorLight (Controller);\r
  }\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
  if (gFullEnumeration) {\r
    gFullEnumeration = FALSE;\r
\r
    Status = gBS->InstallProtocolInterface (\r
                    &PciRootBridgeIo->ParentHandle,\r
                    &gEfiPciEnumerationCompleteProtocolGuid,\r
                    EFI_NATIVE_INTERFACE,\r
                    NULL\r
                    );\r
    ASSERT_EFI_ERROR (Status);\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Stop this driver on ControllerHandle. Support stopping 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
    // 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
Commit	Line	Data
9060e3ec	1	/** @file\r
	2	Driver Binding functions for PCI Bus module.\r
	3	\r
	4	Single PCI bus driver instance will manager all PCI Root Bridges in one EFI based firmware,\r
	5	since all PCI Root Bridges' resources need to be managed together.\r
	6	Supported() function will try to get PCI Root Bridge IO Protocol.\r
	7	Start() function will get PCI Host Bridge Resource Allocation Protocol to manage all\r
	8	PCI Root Bridges. So it means platform needs install PCI Root Bridge IO protocol for each\r
	9	PCI Root Bus and install PCI Host Bridge Resource Allocation Protocol.\r
	10	\r
995d8b85	11	Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
9d510e61	12	SPDX-License-Identifier: BSD-2-Clause-Patent\r
9060e3ec	13	\r
	14	**/\r
	15	\r
	16	#include "PciBus.h"\r
	17	\r
	18	//\r
	19	// PCI Bus Driver Global Variables\r
	20	//\r
1436aea4	21	EFI_DRIVER_BINDING_PROTOCOL gPciBusDriverBinding = {\r
9060e3ec	22	PciBusDriverBindingSupported,\r
	23	PciBusDriverBindingStart,\r
	24	PciBusDriverBindingStop,\r
	25	0xa,\r
	26	NULL,\r
	27	NULL\r
	28	};\r
	29	\r
	30	EFI_HANDLE gPciHostBrigeHandles[PCI_MAX_HOST_BRIDGE_NUM];\r
ea669c1b	31	EFI_INCOMPATIBLE_PCI_DEVICE_SUPPORT_PROTOCOL *gIncompatiblePciDeviceSupport = NULL;\r
1436aea4 MK	32	UINTN gPciHostBridgeNumber = 0;\r
	33	BOOLEAN gFullEnumeration = TRUE;\r
	34	UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;\r
	35	UINT64 gAllZero = 0;\r
9060e3ec	36	\r
1436aea4 MK	37	EFI_PCI_PLATFORM_PROTOCOL *gPciPlatformProtocol;\r
	38	EFI_PCI_OVERRIDE_PROTOCOL *gPciOverrideProtocol;\r
	39	EDKII_IOMMU_PROTOCOL *mIoMmuProtocol;\r
	40	EDKII_DEVICE_SECURITY_PROTOCOL *mDeviceSecurityProtocol;\r
9060e3ec	41	\r
1436aea4	42	GLOBAL_REMOVE_IF_UNREFERENCED EFI_PCI_HOTPLUG_REQUEST_PROTOCOL mPciHotPlugRequest = {\r
9060e3ec	43	PciHotPlugRequestNotify\r
	44	};\r
	45	\r
	46	/**\r
	47	The Entry Point for PCI Bus module. The user code starts with this function.\r
	48	\r
	49	Installs driver module protocols and. Creates virtual device handles for ConIn,\r
	50	ConOut, and StdErr. Installs Simple Text In protocol, Simple Text In Ex protocol,\r
	51	Simple Pointer protocol, Absolute Pointer protocol on those virtual handlers.\r
	52	Installs Graphics Output protocol and/or UGA Draw protocol if needed.\r
	53	\r
	54	@param[in] ImageHandle The firmware allocated handle for the EFI image.\r
	55	@param[in] SystemTable A pointer to the EFI System Table.\r
	56	\r
	57	@retval EFI_SUCCESS The entry point is executed successfully.\r
	58	@retval other Some error occurred when executing this entry point.\r
	59	\r
	60	**/\r
	61	EFI_STATUS\r
	62	EFIAPI\r
	63	PciBusEntryPoint (\r
1436aea4 MK	64	IN EFI_HANDLE ImageHandle,\r
1436aea4 MK	65	IN EFI_SYSTEM_TABLE *SystemTable\r
9060e3ec	66	)\r
	67	{\r
	68	EFI_STATUS Status;\r
	69	EFI_HANDLE Handle;\r
	70	\r
	71	//\r
	72	// Initializes PCI devices pool\r
	73	//\r
	74	InitializePciDevicePool ();\r
	75	\r
	76	//\r
	77	// Install driver model protocol(s).\r
	78	//\r
	79	Status = EfiLibInstallDriverBindingComponentName2 (\r
	80	ImageHandle,\r
	81	SystemTable,\r
	82	&gPciBusDriverBinding,\r
	83	ImageHandle,\r
	84	&gPciBusComponentName,\r
	85	&gPciBusComponentName2\r
	86	);\r
	87	ASSERT_EFI_ERROR (Status);\r
	88	\r
	89	if (FeaturePcdGet (PcdPciBusHotplugDeviceSupport)) {\r
	90	//\r
	91	// If Hot Plug is supported, install EFI PCI Hot Plug Request protocol.\r
	92	//\r
	93	Handle = NULL;\r
	94	Status = gBS->InstallProtocolInterface (\r
	95	&Handle,\r
	96	&gEfiPciHotPlugRequestProtocolGuid,\r
	97	EFI_NATIVE_INTERFACE,\r
	98	&mPciHotPlugRequest\r
	99	);\r
	100	}\r
	101	\r
	102	return Status;\r
	103	}\r
	104	\r
	105	/**\r
	106	Test to see if this driver supports ControllerHandle. Any ControllerHandle\r
	107	than contains a gEfiPciRootBridgeIoProtocolGuid protocol can be supported.\r
	108	\r
	109	@param This Protocol instance pointer.\r
	110	@param Controller Handle of device to test.\r
ed356b9e	111	@param RemainingDevicePath Optional parameter use to pick a specific child\r
9060e3ec	112	device to start.\r
	113	\r
	114	@retval EFI_SUCCESS This driver supports this device.\r
	115	@retval EFI_ALREADY_STARTED This driver is already running on this device.\r
	116	@retval other This driver does not support this device.\r
	117	\r
	118	**/\r
	119	EFI_STATUS\r
	120	EFIAPI\r
	121	PciBusDriverBindingSupported (\r
1436aea4 MK	122	IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
	123	IN EFI_HANDLE Controller,\r
	124	IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
9060e3ec	125	)\r
9060e3ec	126	{\r
1436aea4 MK	127	EFI_STATUS Status;\r
	128	EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
	129	EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
	130	EFI_DEV_PATH_PTR Node;\r
9060e3ec	131	\r
	132	//\r
	133	// Check RemainingDevicePath validation\r
	134	//\r
	135	if (RemainingDevicePath != NULL) {\r
	136	//\r
d1102dba	137	// Check if RemainingDevicePath is the End of Device Path Node,\r
9060e3ec	138	// if yes, go on checking other conditions\r
	139	//\r
	140	if (!IsDevicePathEnd (RemainingDevicePath)) {\r
	141	//\r
	142	// If RemainingDevicePath isn't the End of Device Path Node,\r
	143	// check its validation\r
	144	//\r
	145	Node.DevPath = RemainingDevicePath;\r
1436aea4 MK	146	if ((Node.DevPath->Type != HARDWARE_DEVICE_PATH) \|\|\r
	147	(Node.DevPath->SubType != HW_PCI_DP) \|\|\r
	148	(DevicePathNodeLength (Node.DevPath) != sizeof (PCI_DEVICE_PATH)))\r
	149	{\r
9060e3ec	150	return EFI_UNSUPPORTED;\r
	151	}\r
	152	}\r
	153	}\r
	154	\r
	155	//\r
	156	// Check if Pci Root Bridge IO protocol is installed by platform\r
	157	//\r
	158	Status = gBS->OpenProtocol (\r
	159	Controller,\r
	160	&gEfiPciRootBridgeIoProtocolGuid,\r
1436aea4	161	(VOID **)&PciRootBridgeIo,\r
9060e3ec	162	This->DriverBindingHandle,\r
	163	Controller,\r
	164	EFI_OPEN_PROTOCOL_BY_DRIVER\r
	165	);\r
	166	if (Status == EFI_ALREADY_STARTED) {\r
	167	return EFI_SUCCESS;\r
	168	}\r
	169	\r
	170	if (EFI_ERROR (Status)) {\r
	171	return Status;\r
	172	}\r
	173	\r
	174	//\r
	175	// Close the I/O Abstraction(s) used to perform the supported test\r
	176	//\r
	177	gBS->CloseProtocol (\r
1436aea4 MK	178	Controller,\r
	179	&gEfiPciRootBridgeIoProtocolGuid,\r
	180	This->DriverBindingHandle,\r
	181	Controller\r
	182	);\r
9060e3ec	183	\r
	184	//\r
	185	// Open the EFI Device Path protocol needed to perform the supported test\r
	186	//\r
	187	Status = gBS->OpenProtocol (\r
	188	Controller,\r
	189	&gEfiDevicePathProtocolGuid,\r
1436aea4	190	(VOID **)&ParentDevicePath,\r
9060e3ec	191	This->DriverBindingHandle,\r
	192	Controller,\r
	193	EFI_OPEN_PROTOCOL_BY_DRIVER\r
	194	);\r
	195	if (Status == EFI_ALREADY_STARTED) {\r
	196	return EFI_SUCCESS;\r
	197	}\r
	198	\r
	199	if (EFI_ERROR (Status)) {\r
	200	return Status;\r
	201	}\r
	202	\r
	203	//\r
	204	// Close protocol, don't use device path protocol in the Support() function\r
	205	//\r
	206	gBS->CloseProtocol (\r
1436aea4 MK	207	Controller,\r
	208	&gEfiDevicePathProtocolGuid,\r
	209	This->DriverBindingHandle,\r
	210	Controller\r
	211	);\r
9060e3ec	212	\r
	213	return EFI_SUCCESS;\r
	214	}\r
	215	\r
	216	/**\r
	217	Start this driver on ControllerHandle and enumerate Pci bus and start\r
	218	all device under PCI bus.\r
	219	\r
	220	@param This Protocol instance pointer.\r
	221	@param Controller Handle of device to bind driver to.\r
ed356b9e	222	@param RemainingDevicePath Optional parameter use to pick a specific child\r
9060e3ec	223	device to start.\r
	224	\r
	225	@retval EFI_SUCCESS This driver is added to ControllerHandle.\r
	226	@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle.\r
	227	@retval other This driver does not support this device.\r
	228	\r
	229	**/\r
	230	EFI_STATUS\r
	231	EFIAPI\r
	232	PciBusDriverBindingStart (\r
	233	IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
	234	IN EFI_HANDLE Controller,\r
	235	IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
	236	)\r
	237	{\r
1436aea4 MK	238	EFI_STATUS Status;\r
	239	EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
	240	EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
9060e3ec	241	\r
a012bf6e DB	242	//\r
	243	// Initialize PciRootBridgeIo to suppress incorrect compiler warning.\r
	244	//\r
	245	PciRootBridgeIo = NULL;\r
	246	\r
9060e3ec	247	//\r
	248	// Check RemainingDevicePath validation\r
	249	//\r
	250	if (RemainingDevicePath != NULL) {\r
	251	//\r
d1102dba	252	// Check if RemainingDevicePath is the End of Device Path Node,\r
9060e3ec	253	// if yes, return EFI_SUCCESS\r
	254	//\r
	255	if (IsDevicePathEnd (RemainingDevicePath)) {\r
	256	return EFI_SUCCESS;\r
	257	}\r
	258	}\r
	259	\r
500e2ac2 OM	260	gBS->LocateProtocol (\r
	261	&gEfiIncompatiblePciDeviceSupportProtocolGuid,\r
	262	NULL,\r
1436aea4	263	(VOID **)&gIncompatiblePciDeviceSupport\r
500e2ac2	264	);\r
9060e3ec	265	\r
	266	//\r
	267	// If PCI Platform protocol is available, get it now.\r
	268	// If the platform implements this, it must be installed before BDS phase\r
	269	//\r
	270	gPciPlatformProtocol = NULL;\r
	271	gBS->LocateProtocol (\r
1436aea4 MK	272	&gEfiPciPlatformProtocolGuid,\r
	273	NULL,\r
	274	(VOID **)&gPciPlatformProtocol\r
	275	);\r
9060e3ec	276	\r
	277	//\r
	278	// If PCI Platform protocol doesn't exist, try to Pci Override Protocol.\r
	279	//\r
d1102dba	280	if (gPciPlatformProtocol == NULL) {\r
9060e3ec	281	gPciOverrideProtocol = NULL;\r
9060e3ec	282	gBS->LocateProtocol (\r
1436aea4 MK	283	&gEfiPciOverrideProtocolGuid,\r
	284	NULL,\r
	285	(VOID **)&gPciOverrideProtocol\r
	286	);\r
d1102dba	287	}\r
9060e3ec	288	\r
11a6cc5b JY	289	if (mIoMmuProtocol == NULL) {\r
11a6cc5b JY	290	gBS->LocateProtocol (\r
1436aea4 MK	291	&gEdkiiIoMmuProtocolGuid,\r
	292	NULL,\r
	293	(VOID **)&mIoMmuProtocol\r
	294	);\r
11a6cc5b JY	295	}\r
11a6cc5b JY	296	\r
995d8b85 JY	297	if (mDeviceSecurityProtocol == NULL) {\r
995d8b85 JY	298	gBS->LocateProtocol (\r
1436aea4 MK	299	&gEdkiiDeviceSecurityProtocolGuid,\r
	300	NULL,\r
	301	(VOID **)&mDeviceSecurityProtocol\r
	302	);\r
995d8b85 JY	303	}\r
995d8b85 JY	304	\r
5624a27d WL	305	if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r
	306	gFullEnumeration = FALSE;\r
	307	} else {\r
1436aea4	308	gFullEnumeration = (BOOLEAN)((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r
5624a27d	309	}\r
9060e3ec	310	\r
37623a5c	311	//\r
	312	// Open Device Path Protocol for PCI root bridge\r
	313	//\r
	314	Status = gBS->OpenProtocol (\r
	315	Controller,\r
	316	&gEfiDevicePathProtocolGuid,\r
1436aea4	317	(VOID **)&ParentDevicePath,\r
37623a5c	318	This->DriverBindingHandle,\r
	319	Controller,\r
	320	EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
d1102dba	321	);\r
37623a5c	322	ASSERT_EFI_ERROR (Status);\r
	323	\r
	324	//\r
	325	// Report Status Code to indicate PCI bus starts\r
	326	//\r
	327	REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
	328	EFI_PROGRESS_CODE,\r
	329	(EFI_IO_BUS_PCI \| EFI_IOB_PC_INIT),\r
	330	ParentDevicePath\r
	331	);\r
	332	\r
26329817	333	Status = EFI_SUCCESS;\r
9060e3ec	334	//\r
	335	// Enumerate the entire host bridge\r
	336	// After enumeration, a database that records all the device information will be created\r
	337	//\r
	338	//\r
26329817 RN	339	if (gFullEnumeration) {\r
	340	//\r
	341	// Get the rootbridge Io protocol to find the host bridge handle\r
	342	//\r
	343	Status = gBS->OpenProtocol (\r
	344	Controller,\r
	345	&gEfiPciRootBridgeIoProtocolGuid,\r
1436aea4	346	(VOID **)&PciRootBridgeIo,\r
26329817 RN	347	gPciBusDriverBinding.DriverBindingHandle,\r
	348	Controller,\r
	349	EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
	350	);\r
	351	\r
	352	if (!EFI_ERROR (Status)) {\r
	353	Status = PciEnumerator (Controller, PciRootBridgeIo->ParentHandle);\r
	354	}\r
	355	} else {\r
	356	//\r
	357	// If PCI bus has already done the full enumeration, never do it again\r
	358	//\r
	359	Status = PciEnumeratorLight (Controller);\r
	360	}\r
9060e3ec	361	\r
	362	if (EFI_ERROR (Status)) {\r
	363	return Status;\r
	364	}\r
	365	\r
	366	//\r
	367	// Start all the devices under the entire host bridge.\r
	368	//\r
	369	StartPciDevices (Controller);\r
	370	\r
42e8bc7d RN	371	if (gFullEnumeration) {\r
	372	gFullEnumeration = FALSE;\r
	373	\r
	374	Status = gBS->InstallProtocolInterface (\r
	375	&PciRootBridgeIo->ParentHandle,\r
	376	&gEfiPciEnumerationCompleteProtocolGuid,\r
	377	EFI_NATIVE_INTERFACE,\r
	378	NULL\r
	379	);\r
	380	ASSERT_EFI_ERROR (Status);\r
	381	}\r
	382	\r
	383	return Status;\r
9060e3ec	384	}\r
	385	\r
	386	/**\r
ed356b9e	387	Stop this driver on ControllerHandle. Support stopping any child handles\r
9060e3ec	388	created by this driver.\r
	389	\r
	390	@param This Protocol instance pointer.\r
	391	@param Controller Handle of device to stop driver on.\r
	392	@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r
	393	children is zero stop the entire bus driver.\r
	394	@param ChildHandleBuffer List of Child Handles to Stop.\r
	395	\r
	396	@retval EFI_SUCCESS This driver is removed ControllerHandle.\r
	397	@retval other This driver was not removed from this device.\r
	398	\r
	399	**/\r
	400	EFI_STATUS\r
	401	EFIAPI\r
	402	PciBusDriverBindingStop (\r
1436aea4 MK	403	IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
	404	IN EFI_HANDLE Controller,\r
	405	IN UINTN NumberOfChildren,\r
	406	IN EFI_HANDLE *ChildHandleBuffer\r
9060e3ec	407	)\r
	408	{\r
	409	EFI_STATUS Status;\r
	410	UINTN Index;\r
	411	BOOLEAN AllChildrenStopped;\r
	412	\r
	413	if (NumberOfChildren == 0) {\r
	414	//\r
	415	// Close the bus driver\r
	416	//\r
	417	gBS->CloseProtocol (\r
1436aea4 MK	418	Controller,\r
	419	&gEfiDevicePathProtocolGuid,\r
	420	This->DriverBindingHandle,\r
	421	Controller\r
	422	);\r
9060e3ec	423	gBS->CloseProtocol (\r
1436aea4 MK	424	Controller,\r
	425	&gEfiPciRootBridgeIoProtocolGuid,\r
	426	This->DriverBindingHandle,\r
	427	Controller\r
	428	);\r
9060e3ec	429	\r
	430	DestroyRootBridgeByHandle (\r
	431	Controller\r
	432	);\r
	433	\r
	434	return EFI_SUCCESS;\r
	435	}\r
	436	\r
	437	//\r
	438	// Stop all the children\r
	439	//\r
	440	\r
	441	AllChildrenStopped = TRUE;\r
	442	\r
	443	for (Index = 0; Index < NumberOfChildren; Index++) {\r
9060e3ec	444	//\r
	445	// De register all the pci device\r
	446	//\r
	447	Status = DeRegisterPciDevice (Controller, ChildHandleBuffer[Index]);\r
	448	\r
	449	if (EFI_ERROR (Status)) {\r
	450	AllChildrenStopped = FALSE;\r
	451	}\r
	452	}\r
	453	\r
	454	if (!AllChildrenStopped) {\r
	455	return EFI_DEVICE_ERROR;\r
	456	}\r
	457	\r
	458	return EFI_SUCCESS;\r
	459	}\r