[問題] UEFI的Driver-Model Driver

看板C_and_CPP (C/C++)作者devcc (凱西)時間1年前 (2023/03/23 11:22)推噓0(0推 0噓 4→)

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開發平台(Platform): (Ex: Win10, Linux, ...) 編譯器(Ex: GCC, clang, VC++...)+目標環境(跟開發平台不同的話需列出) VScode 額外使用到的函數庫(Library Used): (Ex: OpenGL, ...) 問題(Question)：我自己創一個驅動程序模型來驅動程序，它作用是提供一個協議來讀取 PCI 設備。首先我其實只是在用一個新的協議來包PciIo(不確定自己這樣寫的架構對不對) 測試過後 Supported跟Start似乎都正常，我另外寫一個app.c的來呼叫我新的協議也可以呼叫(只是呼叫出來的東西好像不太理想) 但在disconnect地方出現問題，他無法斷開連結是什麼原因? 程式碼(Code)：(請善用置底文網頁, 記得排版，禁止使用圖檔) #include <Uefi.h> #include <Library/UefiLib.h> #include <Library/UefiBootServicesTableLib.h> #include <Library/UefiDriverEntryPoint.h> #include <Protocol/DriverBinding.h> #include <Protocol/ComponentName2.h> #include <Protocol/PciIo.h> #define LANGUAGE_CODE_ENGLISH "en" // ========================================================== // define My Pci device EFI_GUID gMyPciProtocolGuid = {0xa1bd7202, 0xd040, 0x46ed, {0xb0, 0xcd, 0xf5, 0x2f, 0xa3, 0xad, 0xe7, 0xa6}}; typedef struct _MY_PROTOCOL MY_PROTOCOL; typedef EFI_STATUS (EFIAPI *MY_PROTOCOL_FUNCTION) ( IN MY_PROTOCOL *This, IN EFI_PCI_IO_PROTOCOL *PciIo ); struct _MY_PROTOCOL { MY_PROTOCOL_FUNCTION Function; EFI_PCI_IO_PROTOCOL *PciIo; }; EFI_STATUS EFIAPI MyProtocolFunction ( IN MY_PROTOCOL *This, IN EFI_PCI_IO_PROTOCOL *PciIo ) { UINT32 Data; // Call the PciIo function return PciIo->Pci.Read ( PciIo, EfiPciIoWidthUint32, 0, 1, &Data ); } // ========================================================== // Function Prototypes for Driver Binding Protocol Interface EFI_STATUS EFIAPI Supported( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ); EFI_STATUS EFIAPI Start( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ); EFI_STATUS EFIAPI Stop( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN UINTN NumberOfChildren, IN EFI_HANDLE *ChildHandleBuffer ); EFI_STATUS EFIAPI GetDriverName( IN EFI_COMPONENT_NAME2_PROTOCOL *This, IN CHAR8 *Language, OUT CHAR16 **DriverName ); EFI_STATUS EFIAPI GetControllerName( IN EFI_COMPONENT_NAME2_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE ChildHandle OPTIONAL, IN CHAR8 *Language, OUT CHAR16 **ControllerName ); // ========================================================== // EFI Driver Binding Protocol Instance EFI_DRIVER_BINDING_PROTOCOL gMyPciDriverBinding = { Supported, //Supported Start, //Start, Stop, //Stop, 0xa, //Version, NULL, //Image Handle, NULL //DriverBindingHandle, }; EFI_COMPONENT_NAME2_PROTOCOL gMyPciDriverComponentName2 = { GetDriverName, GetControllerName, LANGUAGE_CODE_ENGLISH }; // ========================================================== // Functions for Driver Binding Protocol Interface EFI_STATUS EFIAPI Supported( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ) { Print(L"driver-model driver Pci Driver Supported\n"); EFI_STATUS Status; UINT16 VendorId; EFI_PCI_IO_PROTOCOL *PciIo; Status = gBS->OpenProtocol ( ControllerHandle, &gEfiPciIoProtocolGuid, (VOID **)&PciIo, This->DriverBindingHandle, ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER ); if (EFI_ERROR (Status)) { return Status; } // Read the Vendor ID of the PCI device Status = PciIo->Pci.Read( PciIo, EfiPciIoWidthUint16, 0x00, 1, &VendorId ); if (EFI_ERROR(Status)) { return Status; } gBS->CloseProtocol ( ControllerHandle, &gEfiPciIoProtocolGuid, This->DriverBindingHandle, ControllerHandle ); if (VendorId == 0x8086) { Print(L"VendorId: %x\n", VendorId); return EFI_SUCCESS; } return EFI_UNSUPPORTED; } EFI_STATUS EFIAPI Start( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ) { Print(L"driver-model driver Pci Driver Start\n"); EFI_STATUS Status; EFI_PCI_IO_PROTOCOL *PciIo; MY_PROTOCOL myProtocol = {MyProtocolFunction,NULL}; Status = gBS->OpenProtocol ( ControllerHandle, &gEfiPciIoProtocolGuid, (VOID **)&PciIo, This->DriverBindingHandle, ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER ); if (EFI_ERROR (Status)) { return Status; } myProtocol.Function = MyProtocolFunction; myProtocol.PciIo = PciIo; // Install the protocol on the handle for the specified PCI device Status = gBS->InstallMultipleProtocolInterfaces( &ControllerHandle, &gMyPciProtocolGuid, myProtocol, NULL ); Print(L"install protocol(gMyPciProtocolGuid): %r\n", Status); if (EFI_ERROR(Status)) { Print(L"Failed to install protocol: %r\n", Status); return Status; } gBS->CloseProtocol ( ControllerHandle, &gEfiPciIoProtocolGuid, This->DriverBindingHandle, ControllerHandle ); return Status; } EFI_STATUS EFIAPI Stop( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN UINTN NumberOfChildren, IN EFI_HANDLE *ChildHandleBuffer ) { Print(L"driver-model driver Pci Driver Stop\n"); EFI_STATUS Status; MY_PROTOCOL *myProtocol; Status = gBS->OpenProtocol( ControllerHandle, &gMyPciProtocolGuid, (VOID**)&myProtocol, ControllerHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL); if (EFI_ERROR(Status)) { return Status; } Status = gBS->UninstallMultipleProtocolInterfaces ( ControllerHandle, &gMyPciProtocolGuid, myProtocol, NULL ); if (EFI_ERROR (Status)) { Print(L"Failed to Uninstall protocol: %r\n", Status); return Status; } Status = gBS->CloseProtocol ( ControllerHandle, &gEfiPciIoProtocolGuid, This->DriverBindingHandle, ControllerHandle ); Print(L"Protocol has been Uninstalled : %r.\n", Status); return EFI_SUCCESS; } EFI_STATUS EFIAPI GetDriverName( IN EFI_COMPONENT_NAME2_PROTOCOL *This, IN CHAR8 *Language, OUT CHAR16 **DriverName ) { Print(L"driver-model driver Pci Driver Name Get Driver Name\n"); //Supports only English if (Language == NULL || AsciiStrCmp( Language, LANGUAGE_CODE_ENGLISH) == 0) { StrCpyS (*DriverName, StrSize(L"My PCI Driver"), L"My PCI Driver"); return EFI_SUCCESS; } else { return EFI_UNSUPPORTED; } } EFI_STATUS EFIAPI GetControllerName( IN EFI_COMPONENT_NAME2_PROTOCOL *This, IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE ChildHandle OPTIONAL, IN CHAR8 *Language, OUT CHAR16 **ControllerName ) { return EFI_UNSUPPORTED; } // ========================================================== // Pci Protocol Functions Implementation EFI_STATUS EFIAPI MyPciDriverEntryPoint ( IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable ) { EFI_STATUS Status; // Install driver model protocol(s). Status = EfiLibInstallDriverBindingComponentName2 ( ImageHandle, SystemTable, &gMyPciDriverBinding, ImageHandle, NULL, &gMyPciDriverComponentName2 ); if (EFI_ERROR(Status)) { Print(L"Failed to install protocol: %r\n", Status); return Status; } return Status; } 補充說明(Supplement)： -- 有沒有準備好我不知道，但我已經做了我最好的選擇。 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 59.124.228.31 (臺灣) ※ 文章網址: https://www.ptt.cc/bbs/C_and_CPP/M.1679541775.A.25E.html