From: MC-Long <877730493@qq.com> Date: 星期六, 29 May 2021 07:03:37 +0000 (+0800) Subject: sdm845Pkg: add new driver Op6tSlotDxe X-Git-Tag: v0.4~33 X-Git-Url: https://git.renegade-project.org/?a=commitdiff_plain;h=7807db6fbda1ce54b1d8e53639faefc870f9d445;p=edk2-sdm845.git sdm845Pkg: add new driver Op6tSlotDxe --- diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/LICENSE b/sdm845Pkg/Drivers/Op6tSlotDxe/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/Op6tSlotDxe.inf b/sdm845Pkg/Drivers/Op6tSlotDxe/Op6tSlotDxe.inf new file mode 100644 index 0000000..7a330d5 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/Op6tSlotDxe.inf @@ -0,0 +1,24 @@ +[Defines] + INF_VERSION = 0x0010005 + BASE_NAME = Op6tSlotDxe + MODULE_TYPE = DXE_DRIVER + FILE_GUID = ff270133-610c-45b5-3acb-879e91b5d1dd + VERSION_STRING = 1.0 + ENTRY_POINT = SlotMain +[Sources] + slot.c + slot.h + crc32.c + crc32.h +[Packages] + MdePkg/MdePkg.dec +[LibraryClasses] + UefiDriverEntryPoint + UefiLib +[Protocols] + gEfiDiskIoProtocolGuid + gEfiBlockIoProtocolGuid +[Depex] + TRUE +[BuildOptions] +#GCC:*_*_*_CC_FLAGS = -Wno-error diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/README.md b/sdm845Pkg/Drivers/Op6tSlotDxe/README.md new file mode 100644 index 0000000..55ec522 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/README.md @@ -0,0 +1,24 @@ +# Op6TSlot +Add A/B slot support for OnePlus 6T EFI-EDK2 firmware. + +## Introduction +  The OnePlus 6T device uses the A/B slot mode proposed by AOSP. Each time it is started, the bootloader checks if the current slot is available or switches if not. +Therefore, when we use a non-Android system, bootloader will assume that the current slot used is damaged and switch between the slots, since the slot status cannot be updated. +When the same thing happens in another slot, bootloader forces it into fastboot. +  This UEFI Application module is designed to automatically update the slot state after entering UEFI firmware, without requiring an OS level solution to this problem. +  [Implementing A/B Updates](https://source.android.com/devices/tech/ota/ab/ab_implement) +  [About GPT](https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf) + +## Current Status +- [x] Find the disk with the flag. +- [x] Write Slot flag(Active/Bootable/Unbootable) to the disk +- [x] Read GPT partition entry +- [x] Generating CRC32 code for GPT partition entry +- [x] Write the CRC32 code of GPT partition entry to the specified position +- [x] Read the first 92 bytes of the GPT header +- [x] Generating CRC32 code of GPT header +- [x] Write the CRC32 code of GPT header to the specified position +- [x] Has the problem been solved? + +## License +The software is distributed under GPL v3 with additional terms. diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.c b/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.c new file mode 100644 index 0000000..fb64d2f --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.c @@ -0,0 +1,158 @@ +/* + * Op6tSlot Module + * Copyright (C) 2021 longjunyu + * Copyright (C) 2021 Junyue Wang + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see + +EFI_STATUS FixGptCRC32(EFI_BLOCK_IO_PROTOCOL *mBlockIoProtocol, + EFI_DISK_IO_PROTOCOL *mDiskIoProtocol, + EFI_SYSTEM_TABLE *mSystemTable){ + EFI_STATUS status; + UINT32 mMediaId; + UINT32 mBlockSize; + mMediaId = mBlockIoProtocol->Media->MediaId; + mBlockSize = mBlockIoProtocol->Media->BlockSize; + unsigned char crc32_header[GPT_CRC32_LEN]; + unsigned char crc32_entry[GPT_CRC32_LEN]; + unsigned char *bufGptHeader; + unsigned char *bufGptEntry; + // try to allocate pool for bufGptEntry + status = mSystemTable->BootServices->AllocatePool(EfiBootServicesCode, GPT_ENTRY_COUNT * mBlockSize, (VOID**)&bufGptEntry); + if (EFI_ERROR(status)) { + return status; + } + // read gpt entry list + status = mDiskIoProtocol->ReadDisk(mDiskIoProtocol, + mMediaId, + 2 * mBlockSize, + GPT_ENTRY_COUNT * mBlockSize, + bufGptEntry); + + if (EFI_ERROR(status)) + return status; + // get gpt entry crc32 value + get_result_array(calculate_crc32(bufGptEntry, GPT_ENTRY_COUNT * mBlockSize), crc32_entry); + + // write gpt entry crc32 value to disk + status = mDiskIoProtocol->WriteDisk(mDiskIoProtocol, + mMediaId, + mBlockSize + GPT_ENTRY_CRC32_LBA1_OFFSET, + GPT_CRC32_LEN, + crc32_entry); + if (EFI_ERROR(status)) + return status; + // try to release bufGptEntry + status = mSystemTable->BootServices->FreePool(bufGptEntry); + if (EFI_ERROR(status)) { + return status; + } + // try to allocate pool for bufGptHeader + status = mSystemTable->BootServices->AllocatePool(EfiBootServicesCode, GPT_HEADER_SIZE, (VOID**)&bufGptHeader); + // get gpt header + status = mDiskIoProtocol->ReadDisk(mDiskIoProtocol, + mMediaId, + mBlockSize, + GPT_HEADER_SIZE, + bufGptHeader); + if (EFI_ERROR(status)) + return status; + // set previous crc32 value to 0x00 + for (int i = GPT_HEADER_CRC32_LBA1_OFFSET; i < GPT_HEADER_CRC32_LBA1_OFFSET + GPT_CRC32_LEN; i++) { + bufGptHeader[i] = 0x00; + } + // get gpt header crc32 value + get_result_array(calculate_crc32(bufGptHeader, GPT_HEADER_SIZE), crc32_header); + // write gpt header crc32 value to disk + status = mDiskIoProtocol->WriteDisk(mDiskIoProtocol, + mMediaId, + mBlockSize + GPT_HEADER_CRC32_LBA1_OFFSET, + GPT_CRC32_LEN, + crc32_header); + if (EFI_ERROR(status)) + return status; + // try to release bufGptHeader + status = mSystemTable->BootServices->FreePool(bufGptHeader); + if (EFI_ERROR(status)) { + return status; + } + return EFI_SUCCESS; +} + +/* +* A8h reflected is 15h, i.e. 10101000 <--> 00010101 +*/ +int reflect(int data, int len) +{ + int ref = 0; + + for (int i = 0; i < len; i++) { + if (data & 0x1) { + ref |= (1 << ((len - 1) - i)); + } + data = (data >> 1); + } + + return ref; +} + +/* +* Function to calculate the CRC32 +*/ +unsigned int calculate_crc32(unsigned char *buffer, int len) +{ + int byte_length = 8; /*length of unit (i.e. byte) */ + int msb = 0; + int polynomial = 0x04C11DB7; /* IEEE 32bit polynomial */ + unsigned int regs = 0xFFFFFFFF; /* init to all ones */ + int regs_mask = 0xFFFFFFFF; /* ensure only 32 bit answer */ + int regs_msb = 0; + unsigned int reflected_regs; + + for (int i = 0; i < len; i++) { + int data_byte = buffer[i]; + data_byte = reflect(data_byte, 8); + for (int j = 0; j < byte_length; j++) { + msb = data_byte >> (byte_length - 1); /* get MSB */ + msb &= 1; /* ensure just 1 bit */ + regs_msb = (regs >> 31) & 1; /* MSB of regs */ + regs = regs << 1; /* shift regs for CRC-CCITT */ + if (regs_msb ^ msb) { /* MSB is a 1 */ + regs = regs ^ polynomial; /* XOR with generator poly */ + } + regs = regs & regs_mask; /* Mask off excess upper bits */ + data_byte <<= 1; /* get to next bit */ + } + } + regs = regs & regs_mask; + reflected_regs = reflect(regs, 32) ^ 0xFFFFFFFF; + + return reflected_regs; +} + +// Convert Function +//unsigned char** convert(unsigned int reflected_regs, int *size) +void get_result_array(unsigned int reflected_regs, unsigned char * res) +{ + + for (int i = 0; i < 4; i++) { + res[i] = reflected_regs & 0xff; + reflected_regs >>= 8; + } + +} diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.h b/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.h new file mode 100644 index 0000000..b3eb3b1 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/crc32.h @@ -0,0 +1,39 @@ +/* + * Op6tSlot Module + * Copyright (C) 2021 longjunyu + * Copyright (C) 2021 Junyue Wang + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see +#include + +#define GPT_HEADER_CRC32_LBA1_OFFSET 0x10 + +#define GPT_ENTRY_CRC32_LBA1_OFFSET 0x58 + +#define GPT_CRC32_LEN 4 + +#define GPT_HEADER_SIZE 92 + +#define GPT_ENTRY_COUNT 3 + +int reflect(int, int); + +unsigned int calculate_crc32(unsigned char*, int); + +void get_result_array(unsigned int, unsigned char*); + +EFI_STATUS FixGptCRC32(EFI_BLOCK_IO_PROTOCOL*, EFI_DISK_IO_PROTOCOL*, EFI_SYSTEM_TABLE*); diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/slot.c b/sdm845Pkg/Drivers/Op6tSlotDxe/slot.c new file mode 100644 index 0000000..ec67970 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/slot.c @@ -0,0 +1,168 @@ +/* + * Op6tSlot Module + * Copyright (C) 2021 longjunyu + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see +#include +#include +#include +#include "slot.h" +#include "crc32.h" + +void WaitAnyKey(EFI_SYSTEM_TABLE *mSystemTable); + +EFI_STATUS EFIAPI SlotMain(IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable) +{ + EFI_STATUS status; + EFI_HANDLE *controllerHandles = NULL; + UINTN handleIndex, numHandles; + EFI_DISK_IO_PROTOCOL *mDiskIoProtocol = NULL; + EFI_BLOCK_IO_PROTOCOL *mBlockIoProtocol = NULL; + UINT32 mMediaId; + UINT32 mBlockSize; + int index; + unsigned char currentSlotA[OP6T_SLOT_FLAG_SIZE]; + unsigned char currentSlotB[OP6T_SLOT_FLAG_SIZE]; + // list all Handles that installed DiskIoProtocol + status = SystemTable->BootServices->LocateHandleBuffer(ByProtocol, + &gEfiDiskIoProtocolGuid, + NULL, + &numHandles, + &controllerHandles); + if (EFI_ERROR(status)) { + WaitAnyKey(SystemTable); + return status; + } + // ergodic the handles + for (handleIndex = 0; handleIndex < numHandles; handleIndex++) { + // open DiskIoProtocol on target handle + status = SystemTable->BootServices->HandleProtocol( + controllerHandles[handleIndex], + &gEfiDiskIoProtocolGuid, + (VOID**)&mDiskIoProtocol); + unsigned char slotNameBuffer[OP6T_SLOT_BOOT_BUFFER_LEN]; + if (EFI_ERROR(status)) + continue; + // open BlockIoProtocol on target handle + status = SystemTable->BootServices->HandleProtocol( + controllerHandles[handleIndex], + &gEfiBlockIoProtocolGuid, + (VOID**)&mBlockIoProtocol); + if (EFI_ERROR(status)) { + continue; + } else { + // filter disk device by LogicalPartition + if (mBlockIoProtocol->Media->LogicalPartition) + continue; + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"The media is disk.\n"); + mMediaId = mBlockIoProtocol->Media->MediaId; + mBlockSize = mBlockIoProtocol->Media->BlockSize; + // read buffers from disk + status = mDiskIoProtocol->ReadDisk( + mDiskIoProtocol, + mMediaId, + 2 * mBlockSize + OP6T_SLOT_A_BOOT_BUFFER_LBA2_OFFSET, + OP6T_SLOT_BOOT_BUFFER_LEN, + slotNameBuffer); + if (EFI_ERROR(status)) + continue; + // filter disk device by the name of boot partition + int i = 0; + for (index = 0; index < OP6T_SLOT_BOOT_BUFFER_LEN; index++) { + if (slotNameBuffer[index] != OP6T_SLOT_A_BOOT_BUFFER[index]) { + i = 1; + break; + } + } + if (i == 1) + continue; + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"The name of target partition is matched.\n"); + // read flag of slot A + status = mDiskIoProtocol->ReadDisk( + mDiskIoProtocol, + mMediaId, + 2 * mBlockSize + OP6T_SLOT_A_BOOT_FLAG_LBA2_OFFSET, + OP6T_SLOT_FLAG_SIZE, + currentSlotA); + if (EFI_ERROR(status)) + return status; + // read flag of slot B + status = mDiskIoProtocol->ReadDisk( + mDiskIoProtocol, + mMediaId, + 3 * mBlockSize + OP6T_SLOT_B_BOOT_FLAG_LBA3_OFFSET, + OP6T_SLOT_FLAG_SIZE, + currentSlotB); + if (EFI_ERROR(status)) + return status; + + // analyze A/B flags + int flag_offset = 0; + if (currentSlotA[0] == OP6T_SLOT_FLAG_ACTIVE) + return EFI_SUCCESS; + else if (currentSlotA[0] == OP6T_SLOT_FLAG_UNBOOTABLE) + if (currentSlotB[0] == OP6T_SLOT_FLAG_ACTIVE) + return EFI_SUCCESS; + else if (currentSlotB[0] == OP6T_SLOT_FLAG_UNBOOTABLE) + flag_offset = 2 * mBlockSize + OP6T_SLOT_A_BOOT_FLAG_LBA2_OFFSET; + else + flag_offset = 3 * mBlockSize + OP6T_SLOT_B_BOOT_FLAG_LBA3_OFFSET; + else + flag_offset = 2 * mBlockSize + OP6T_SLOT_A_BOOT_FLAG_LBA2_OFFSET; + + + // write flag into disk + unsigned char f[1] = {OP6T_SLOT_FLAG_ACTIVE}; + status = mDiskIoProtocol->WriteDisk( + mDiskIoProtocol, + mMediaId, + flag_offset, + OP6T_SLOT_FLAG_SIZE, + f); + if (EFI_ERROR(status)) { + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Failed to write flag into disk.\n"); + continue; + } else { + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Succeed to write flag into disk.\n"); + break; + } + } + } + //try to fix gpt crc32 + if (mBlockIoProtocol != NULL) { + status = (FixGptCRC32(mBlockIoProtocol, mDiskIoProtocol, SystemTable)); + if (EFI_ERROR(status)) + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Failed to fix CRC32 value.\n"); + else + SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Succeed to fix CRC32 value.\n"); + } + + // release memory + if (controllerHandles != NULL) + SystemTable->BootServices->FreePool(controllerHandles); + //WaitAnyKey(SystemTable); + return EFI_SUCCESS; +} + +void WaitAnyKey(EFI_SYSTEM_TABLE *mSystemTable) { + UINTN index = 0; + EFI_INPUT_KEY Key; + mSystemTable->BootServices->WaitForEvent(1, &mSystemTable->ConIn->WaitForKey, &index); + mSystemTable->ConIn->ReadKeyStroke(mSystemTable->ConIn, &Key); +} + diff --git a/sdm845Pkg/Drivers/Op6tSlotDxe/slot.h b/sdm845Pkg/Drivers/Op6tSlotDxe/slot.h new file mode 100644 index 0000000..f2a9a08 --- /dev/null +++ b/sdm845Pkg/Drivers/Op6tSlotDxe/slot.h @@ -0,0 +1,73 @@ +/* + * Op6tSlot Module + * Copyright (C) 2021 longjunyu + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see