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265 lines
7.8 KiB
C
265 lines
7.8 KiB
C
/******************************************************************************
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* VDiskChainProtocol.c
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*
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* Copyright (c) 2021, longpanda <admin@ventoy.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <Uefi.h>
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#include <Library/DebugLib.h>
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#include <Library/PrintLib.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DevicePathLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/UefiApplicationEntryPoint.h>
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#include <Protocol/LoadedImage.h>
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#include <Guid/FileInfo.h>
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#include <Guid/FileSystemInfo.h>
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#include <Protocol/BlockIo.h>
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#include <Protocol/RamDisk.h>
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#include <Protocol/SimpleFileSystem.h>
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#include <VDiskChain.h>
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/* EFI block device vendor device path GUID */
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EFI_GUID gVDiskBlockDevicePathGuid = VDISK_BLOCK_DEVICE_PATH_GUID;
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EFI_STATUS EFIAPI vdisk_block_io_reset
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(
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN BOOLEAN ExtendedVerification
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)
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{
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(VOID)This;
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(VOID)ExtendedVerification;
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return EFI_SUCCESS;
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}
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EFI_STATUS EFIAPI vdisk_block_io_flush(IN EFI_BLOCK_IO_PROTOCOL *This)
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{
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(VOID)This;
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return EFI_SUCCESS;
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}
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EFI_STATUS EFIAPI vdisk_block_io_read
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(
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA Lba,
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IN UINTN BufferSize,
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OUT VOID *Buffer
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)
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{
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(VOID)This;
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(VOID)MediaId;
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debug("vdisk_block_io_read %lu %lu\n", Lba, BufferSize / 512);
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CopyMem(Buffer, g_disk_buf_addr + (Lba * 512), BufferSize);
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return EFI_SUCCESS;
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}
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EFI_STATUS EFIAPI vdisk_block_io_write
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(
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA Lba,
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IN UINTN BufferSize,
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IN VOID *Buffer
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)
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{
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(VOID)This;
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(VOID)MediaId;
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(VOID)Buffer;
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debug("vdisk_block_io_read %lu %lu\n", Lba, BufferSize / 512);
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return EFI_WRITE_PROTECTED;
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}
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EFI_STATUS EFIAPI vdisk_fill_device_path(VOID)
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{
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UINTN NameLen = 0;
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UINT8 TmpBuf[128] = {0};
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VENDOR_DEVICE_PATH *venPath = NULL;
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venPath = (VENDOR_DEVICE_PATH *)TmpBuf;
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NameLen = StrSize(VDISK_BLOCK_DEVICE_PATH_NAME);
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venPath->Header.Type = HARDWARE_DEVICE_PATH;
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venPath->Header.SubType = HW_VENDOR_DP;
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venPath->Header.Length[0] = sizeof(VENDOR_DEVICE_PATH) + NameLen;
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venPath->Header.Length[1] = 0;
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CopyMem(&venPath->Guid, &gVDiskBlockDevicePathGuid, sizeof(EFI_GUID));
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CopyMem(venPath + 1, VDISK_BLOCK_DEVICE_PATH_NAME, NameLen);
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gVDiskBlockData.Path = AppendDevicePathNode(NULL, (EFI_DEVICE_PATH_PROTOCOL *)TmpBuf);
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gVDiskBlockData.DevicePathCompareLen = sizeof(VENDOR_DEVICE_PATH) + NameLen;
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debug("gVDiskBlockData.Path=<%s>\n", ConvertDevicePathToText(gVDiskBlockData.Path, FALSE, FALSE));
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return EFI_SUCCESS;
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}
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EFI_STATUS EFIAPI vdisk_connect_driver(IN EFI_HANDLE ControllerHandle, IN CONST CHAR16 *DrvName)
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{
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UINTN i = 0;
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UINTN Count = 0;
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CHAR16 *DriverName = NULL;
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EFI_HANDLE *Handles = NULL;
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EFI_HANDLE DrvHandles[2] = { NULL };
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EFI_STATUS Status = EFI_SUCCESS;
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EFI_COMPONENT_NAME_PROTOCOL *NameProtocol = NULL;
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EFI_COMPONENT_NAME2_PROTOCOL *Name2Protocol = NULL;
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debug("vdisk_connect_driver <%s>...", DrvName);
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Status = gBS->LocateHandleBuffer(ByProtocol, &gEfiComponentName2ProtocolGuid,
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NULL, &Count, &Handles);
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if (EFI_ERROR(Status))
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{
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return Status;
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}
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for (i = 0; i < Count; i++)
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{
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Status = gBS->HandleProtocol(Handles[i], &gEfiComponentName2ProtocolGuid, (VOID **)&Name2Protocol);
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if (EFI_ERROR(Status))
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{
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continue;
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}
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Status = Name2Protocol->GetDriverName(Name2Protocol, "en", &DriverName);
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if (EFI_ERROR(Status) || NULL == DriverName)
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{
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continue;
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}
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if (StrStr(DriverName, DrvName))
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{
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debug("Find driver name2:<%s>: <%s>", DriverName, DrvName);
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DrvHandles[0] = Handles[i];
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break;
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}
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}
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if (i < Count)
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{
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Status = gBS->ConnectController(ControllerHandle, DrvHandles, NULL, TRUE);
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debug("vdisk_connect_driver:<%s> <%r>", DrvName, Status);
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goto end;
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}
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debug("%s NOT found, now try COMPONENT_NAME", DrvName);
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Count = 0;
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FreePool(Handles);
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Handles = NULL;
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Status = gBS->LocateHandleBuffer(ByProtocol, &gEfiComponentNameProtocolGuid,
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NULL, &Count, &Handles);
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if (EFI_ERROR(Status))
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{
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return Status;
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}
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for (i = 0; i < Count; i++)
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{
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Status = gBS->HandleProtocol(Handles[i], &gEfiComponentNameProtocolGuid, (VOID **)&NameProtocol);
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if (EFI_ERROR(Status))
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{
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continue;
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}
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Status = NameProtocol->GetDriverName(NameProtocol, "en", &DriverName);
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if (EFI_ERROR(Status))
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{
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continue;
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}
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if (StrStr(DriverName, DrvName))
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{
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debug("Find driver name:<%s>: <%s>", DriverName, DrvName);
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DrvHandles[0] = Handles[i];
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break;
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}
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}
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if (i < Count)
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{
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Status = gBS->ConnectController(ControllerHandle, DrvHandles, NULL, TRUE);
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debug("vdisk_connect_driver:<%s> <%r>", DrvName, Status);
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goto end;
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}
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Status = EFI_NOT_FOUND;
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end:
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FreePool(Handles);
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return Status;
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}
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EFI_STATUS EFIAPI vdisk_install_blockio(IN EFI_HANDLE ImageHandle, IN UINT64 ImgSize)
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{
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EFI_STATUS Status = EFI_SUCCESS;
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EFI_BLOCK_IO_PROTOCOL *pBlockIo = &(gVDiskBlockData.BlockIo);
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vdisk_fill_device_path();
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debug("install block io protocol %p", ImageHandle);
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vdisk_debug_pause();
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gVDiskBlockData.Media.BlockSize = 512;
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gVDiskBlockData.Media.LastBlock = ImgSize / 512 - 1;
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gVDiskBlockData.Media.ReadOnly = TRUE;
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gVDiskBlockData.Media.MediaPresent = 1;
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gVDiskBlockData.Media.LogicalBlocksPerPhysicalBlock = 1;
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pBlockIo->Revision = EFI_BLOCK_IO_PROTOCOL_REVISION3;
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pBlockIo->Media = &(gVDiskBlockData.Media);
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pBlockIo->Reset = vdisk_block_io_reset;
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pBlockIo->ReadBlocks = vdisk_block_io_read;
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pBlockIo->WriteBlocks = vdisk_block_io_write;
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pBlockIo->FlushBlocks = vdisk_block_io_flush;
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Status = gBS->InstallMultipleProtocolInterfaces(&gVDiskBlockData.Handle,
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&gEfiBlockIoProtocolGuid, &gVDiskBlockData.BlockIo,
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&gEfiDevicePathProtocolGuid, gVDiskBlockData.Path,
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NULL);
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debug("Install protocol %r %p", Status, gVDiskBlockData.Handle);
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if (EFI_ERROR(Status))
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{
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return Status;
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}
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Status = vdisk_connect_driver(gVDiskBlockData.Handle, L"Disk I/O Driver");
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debug("Connect disk IO driver %r", Status);
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Status = vdisk_connect_driver(gVDiskBlockData.Handle, L"Partition Driver");
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debug("Connect partition driver %r", Status);
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if (EFI_ERROR(Status))
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{
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Status = gBS->ConnectController(gVDiskBlockData.Handle, NULL, NULL, TRUE);
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debug("Connect all controller %r", Status);
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}
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vdisk_debug_pause();
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return EFI_SUCCESS;
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}
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