diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHcMem.c')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHcMem.c | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHcMem.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHcMem.c new file mode 100644 index 00000000..411040bf --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHcMem.c @@ -0,0 +1,429 @@ +/** @file + +Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR> + +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "SdBlockIoPei.h" + +/** + Allocate a block of memory to be used by the buffer pool. + + @param Pages How many pages to allocate. + + @return The allocated memory block or NULL if failed. + +**/ +SD_PEIM_MEM_BLOCK * +SdPeimAllocMemBlock ( + IN UINTN Pages + ) +{ + SD_PEIM_MEM_BLOCK *Block; + VOID *BufHost; + VOID *Mapping; + EFI_PHYSICAL_ADDRESS MappedAddr; + EFI_STATUS Status; + VOID *TempPtr; + + TempPtr = NULL; + Block = NULL; + + Status = PeiServicesAllocatePool (sizeof(SD_PEIM_MEM_BLOCK), &TempPtr); + if (EFI_ERROR (Status)) { + return NULL; + } + + ZeroMem ((VOID*)(UINTN)TempPtr, sizeof(SD_PEIM_MEM_BLOCK)); + + // + // each bit in the bit array represents SD_PEIM_MEM_UNIT + // bytes of memory in the memory block. + // + ASSERT (SD_PEIM_MEM_UNIT * 8 <= EFI_PAGE_SIZE); + + Block = (SD_PEIM_MEM_BLOCK*)(UINTN)TempPtr; + Block->BufLen = EFI_PAGES_TO_SIZE (Pages); + Block->BitsLen = Block->BufLen / (SD_PEIM_MEM_UNIT * 8); + + Status = PeiServicesAllocatePool (Block->BitsLen, &TempPtr); + if (EFI_ERROR (Status)) { + return NULL; + } + + ZeroMem ((VOID*)(UINTN)TempPtr, Block->BitsLen); + + Block->Bits = (UINT8*)(UINTN)TempPtr; + + Status = IoMmuAllocateBuffer ( + Pages, + &BufHost, + &MappedAddr, + &Mapping + ); + if (EFI_ERROR (Status)) { + return NULL; + } + + ZeroMem ((VOID*)(UINTN)BufHost, EFI_PAGES_TO_SIZE (Pages)); + + Block->BufHost = (UINT8 *) (UINTN) BufHost; + Block->Buf = (UINT8 *) (UINTN) MappedAddr; + Block->Mapping = Mapping; + Block->Next = NULL; + + return Block; +} + +/** + Free the memory block from the memory pool. + + @param Pool The memory pool to free the block from. + @param Block The memory block to free. + +**/ +VOID +SdPeimFreeMemBlock ( + IN SD_PEIM_MEM_POOL *Pool, + IN SD_PEIM_MEM_BLOCK *Block + ) +{ + ASSERT ((Pool != NULL) && (Block != NULL)); + + IoMmuFreeBuffer (EFI_SIZE_TO_PAGES (Block->BufLen), Block->BufHost, Block->Mapping); +} + +/** + Alloc some memory from the block. + + @param Block The memory block to allocate memory from. + @param Units Number of memory units to allocate. + + @return The pointer to the allocated memory. If couldn't allocate the needed memory, + the return value is NULL. + +**/ +VOID * +SdPeimAllocMemFromBlock ( + IN SD_PEIM_MEM_BLOCK *Block, + IN UINTN Units + ) +{ + UINTN Byte; + UINT8 Bit; + UINTN StartByte; + UINT8 StartBit; + UINTN Available; + UINTN Count; + + ASSERT ((Block != 0) && (Units != 0)); + + StartByte = 0; + StartBit = 0; + Available = 0; + + for (Byte = 0, Bit = 0; Byte < Block->BitsLen;) { + // + // If current bit is zero, the corresponding memory unit is + // available, otherwise we need to restart our searching. + // Available counts the consecutive number of zero bit. + // + if (!SD_PEIM_MEM_BIT_IS_SET (Block->Bits[Byte], Bit)) { + Available++; + + if (Available >= Units) { + break; + } + + SD_PEIM_NEXT_BIT (Byte, Bit); + + } else { + SD_PEIM_NEXT_BIT (Byte, Bit); + + Available = 0; + StartByte = Byte; + StartBit = Bit; + } + } + + if (Available < Units) { + return NULL; + } + + // + // Mark the memory as allocated + // + Byte = StartByte; + Bit = StartBit; + + for (Count = 0; Count < Units; Count++) { + ASSERT (!SD_PEIM_MEM_BIT_IS_SET (Block->Bits[Byte], Bit)); + + Block->Bits[Byte] = (UINT8) (Block->Bits[Byte] | (UINT8) SD_PEIM_MEM_BIT (Bit)); + SD_PEIM_NEXT_BIT (Byte, Bit); + } + + return Block->Buf + (StartByte * 8 + StartBit) * SD_PEIM_MEM_UNIT; +} + +/** + Insert the memory block to the pool's list of the blocks. + + @param Head The head of the memory pool's block list. + @param Block The memory block to insert. + +**/ +VOID +SdPeimInsertMemBlockToPool ( + IN SD_PEIM_MEM_BLOCK *Head, + IN SD_PEIM_MEM_BLOCK *Block + ) +{ + ASSERT ((Head != NULL) && (Block != NULL)); + Block->Next = Head->Next; + Head->Next = Block; +} + +/** + Is the memory block empty? + + @param Block The memory block to check. + + @retval TRUE The memory block is empty. + @retval FALSE The memory block isn't empty. + +**/ +BOOLEAN +SdPeimIsMemBlockEmpty ( + IN SD_PEIM_MEM_BLOCK *Block + ) +{ + UINTN Index; + + + for (Index = 0; Index < Block->BitsLen; Index++) { + if (Block->Bits[Index] != 0) { + return FALSE; + } + } + + return TRUE; +} + + + +/** + Initialize the memory management pool for the host controller. + + @param Private The Sd Peim driver private data. + + @retval EFI_SUCCESS The memory pool is initialized. + @retval Others Fail to init the memory pool. + +**/ +EFI_STATUS +SdPeimInitMemPool ( + IN SD_PEIM_HC_PRIVATE_DATA *Private + ) +{ + SD_PEIM_MEM_POOL *Pool; + EFI_STATUS Status; + VOID *TempPtr; + + TempPtr = NULL; + Pool = NULL; + + Status = PeiServicesAllocatePool (sizeof (SD_PEIM_MEM_POOL), &TempPtr); + if (EFI_ERROR (Status)) { + return EFI_OUT_OF_RESOURCES; + } + + ZeroMem ((VOID*)(UINTN)TempPtr, sizeof (SD_PEIM_MEM_POOL)); + + Pool = (SD_PEIM_MEM_POOL *)((UINTN)TempPtr); + + Pool->Head = SdPeimAllocMemBlock (SD_PEIM_MEM_DEFAULT_PAGES); + + if (Pool->Head == NULL) { + return EFI_OUT_OF_RESOURCES; + } + + Private->Pool = Pool; + return EFI_SUCCESS; +} + +/** + Release the memory management pool. + + @param Pool The memory pool to free. + + @retval EFI_DEVICE_ERROR Fail to free the memory pool. + @retval EFI_SUCCESS The memory pool is freed. + +**/ +EFI_STATUS +SdPeimFreeMemPool ( + IN SD_PEIM_MEM_POOL *Pool + ) +{ + SD_PEIM_MEM_BLOCK *Block; + + ASSERT (Pool->Head != NULL); + + // + // Unlink all the memory blocks from the pool, then free them. + // + for (Block = Pool->Head->Next; Block != NULL; Block = Pool->Head->Next) { + SdPeimFreeMemBlock (Pool, Block); + } + + SdPeimFreeMemBlock (Pool, Pool->Head); + + return EFI_SUCCESS; +} + +/** + Allocate some memory from the host controller's memory pool + which can be used to communicate with host controller. + + @param Pool The host controller's memory pool. + @param Size Size of the memory to allocate. + + @return The allocated memory or NULL. + +**/ +VOID * +SdPeimAllocateMem ( + IN SD_PEIM_MEM_POOL *Pool, + IN UINTN Size + ) +{ + SD_PEIM_MEM_BLOCK *Head; + SD_PEIM_MEM_BLOCK *Block; + SD_PEIM_MEM_BLOCK *NewBlock; + VOID *Mem; + UINTN AllocSize; + UINTN Pages; + + Mem = NULL; + AllocSize = SD_PEIM_MEM_ROUND (Size); + Head = Pool->Head; + ASSERT (Head != NULL); + + // + // First check whether current memory blocks can satisfy the allocation. + // + for (Block = Head; Block != NULL; Block = Block->Next) { + Mem = SdPeimAllocMemFromBlock (Block, AllocSize / SD_PEIM_MEM_UNIT); + + if (Mem != NULL) { + ZeroMem (Mem, Size); + break; + } + } + + if (Mem != NULL) { + return Mem; + } + + // + // Create a new memory block if there is not enough memory + // in the pool. If the allocation size is larger than the + // default page number, just allocate a large enough memory + // block. Otherwise allocate default pages. + // + if (AllocSize > EFI_PAGES_TO_SIZE (SD_PEIM_MEM_DEFAULT_PAGES)) { + Pages = EFI_SIZE_TO_PAGES (AllocSize) + 1; + } else { + Pages = SD_PEIM_MEM_DEFAULT_PAGES; + } + + NewBlock = SdPeimAllocMemBlock (Pages); + if (NewBlock == NULL) { + return NULL; + } + + // + // Add the new memory block to the pool, then allocate memory from it + // + SdPeimInsertMemBlockToPool (Head, NewBlock); + Mem = SdPeimAllocMemFromBlock (NewBlock, AllocSize / SD_PEIM_MEM_UNIT); + + if (Mem != NULL) { + ZeroMem (Mem, Size); + } + + return Mem; +} + +/** + Free the allocated memory back to the memory pool. + + @param Pool The memory pool of the host controller. + @param Mem The memory to free. + @param Size The size of the memory to free. + +**/ +VOID +SdPeimFreeMem ( + IN SD_PEIM_MEM_POOL *Pool, + IN VOID *Mem, + IN UINTN Size + ) +{ + SD_PEIM_MEM_BLOCK *Head; + SD_PEIM_MEM_BLOCK *Block; + UINT8 *ToFree; + UINTN AllocSize; + UINTN Byte; + UINTN Bit; + UINTN Count; + + Head = Pool->Head; + AllocSize = SD_PEIM_MEM_ROUND (Size); + ToFree = (UINT8 *) Mem; + + for (Block = Head; Block != NULL; Block = Block->Next) { + // + // scan the memory block list for the memory block that + // completely contains the memory to free. + // + if ((Block->Buf <= ToFree) && ((ToFree + AllocSize) <= (Block->Buf + Block->BufLen))) { + // + // compute the start byte and bit in the bit array + // + Byte = ((ToFree - Block->Buf) / SD_PEIM_MEM_UNIT) / 8; + Bit = ((ToFree - Block->Buf) / SD_PEIM_MEM_UNIT) % 8; + + // + // reset associated bits in bit array + // + for (Count = 0; Count < (AllocSize / SD_PEIM_MEM_UNIT); Count++) { + ASSERT (SD_PEIM_MEM_BIT_IS_SET (Block->Bits[Byte], Bit)); + + Block->Bits[Byte] = (UINT8) (Block->Bits[Byte] ^ SD_PEIM_MEM_BIT (Bit)); + SD_PEIM_NEXT_BIT (Byte, Bit); + } + + break; + } + } + + // + // If Block == NULL, it means that the current memory isn't + // in the host controller's pool. This is critical because + // the caller has passed in a wrong memory point + // + ASSERT (Block != NULL); + + // + // Release the current memory block if it is empty and not the head + // + if ((Block != Head) && SdPeimIsMemBlockEmpty (Block)) { + SdPeimFreeMemBlock (Pool, Block); + } + + return ; +} |