Import EhciDxe and UhciDxe into MdeModulePkg.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3191 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff
548
MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c
Normal file
548
MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c
Normal file
@@ -0,0 +1,548 @@
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/** @file
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Copyright (c) 2007, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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EhciMem.c
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Abstract:
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Revision History
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**/
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#include "Uhci.h"
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UINTN mUsbHcDebugLevel = DEBUG_INFO;
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/**
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Allocate a block of memory to be used by the buffer pool
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@param Pool The buffer pool to allocate memory for
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@param Pages How many pages to allocate
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@return The allocated memory block or NULL if failed
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**/
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STATIC
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USBHC_MEM_BLOCK *
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UsbHcAllocMemBlock (
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IN USBHC_MEM_POOL *Pool,
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IN UINTN Pages
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)
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{
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USBHC_MEM_BLOCK *Block;
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EFI_PCI_IO_PROTOCOL *PciIo;
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VOID *BufHost;
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VOID *Mapping;
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EFI_PHYSICAL_ADDRESS MappedAddr;
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UINTN Bytes;
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EFI_STATUS Status;
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PciIo = Pool->PciIo;
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Block = AllocateZeroPool (sizeof (USBHC_MEM_BLOCK));
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if (Block == NULL) {
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return NULL;
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}
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//
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// each bit in the bit array represents USBHC_MEM_UNIT
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// bytes of memory in the memory block.
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//
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ASSERT (USBHC_MEM_UNIT * 8 <= EFI_PAGE_SIZE);
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Block->BufLen = EFI_PAGES_TO_SIZE (Pages);
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Block->BitsLen = Block->BufLen / (USBHC_MEM_UNIT * 8);
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Block->Bits = AllocateZeroPool (Block->BitsLen);
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if (Block->Bits == NULL) {
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gBS->FreePool (Block);
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return NULL;
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}
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//
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// Allocate the number of Pages of memory, then map it for
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// bus master read and write.
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//
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Status = PciIo->AllocateBuffer (
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PciIo,
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AllocateAnyPages,
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EfiBootServicesData,
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Pages,
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&BufHost,
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0
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);
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if (EFI_ERROR (Status)) {
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goto FREE_BITARRAY;
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}
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Bytes = EFI_PAGES_TO_SIZE (Pages);
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Status = PciIo->Map (
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PciIo,
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EfiPciIoOperationBusMasterCommonBuffer,
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BufHost,
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&Bytes,
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&MappedAddr,
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&Mapping
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);
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if (EFI_ERROR (Status) || (Bytes != EFI_PAGES_TO_SIZE (Pages))) {
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goto FREE_BUFFER;
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}
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//
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// Check whether the data structure used by the host controller
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// should be restricted into the same 4G
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//
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if (Pool->Check4G && (Pool->Which4G != USB_HC_HIGH_32BIT (MappedAddr))) {
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PciIo->Unmap (PciIo, Mapping);
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goto FREE_BUFFER;
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}
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Block->BufHost = BufHost;
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Block->Buf = (UINT8 *) ((UINTN) MappedAddr);
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Block->Mapping = Mapping;
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DEBUG ((mUsbHcDebugLevel, "UsbHcAllocMemBlock: block %x created with buffer %x\n",
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Block, Block->Buf));
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return Block;
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FREE_BUFFER:
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PciIo->FreeBuffer (PciIo, Pages, BufHost);
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FREE_BITARRAY:
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gBS->FreePool (Block->Bits);
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gBS->FreePool (Block);
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return NULL;
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}
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/**
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Free the memory block from the memory pool
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@param Pool The memory pool to free the block from
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@param Block The memory block to free
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@return VOID
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**/
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STATIC
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VOID
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UsbHcFreeMemBlock (
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IN USBHC_MEM_POOL *Pool,
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IN USBHC_MEM_BLOCK *Block
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)
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{
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EFI_PCI_IO_PROTOCOL *PciIo;
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ASSERT ((Pool != NULL) && (Block != NULL));
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PciIo = Pool->PciIo;
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//
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// Unmap the common buffer then free the structures
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//
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PciIo->Unmap (PciIo, Block->Mapping);
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PciIo->FreeBuffer (PciIo, EFI_SIZE_TO_PAGES (Block->BufLen), Block->BufHost);
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gBS->FreePool (Block->Bits);
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gBS->FreePool (Block);
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}
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/**
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Alloc some memory from the block
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@param Block The memory block to allocate memory from
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@param Mem The variable to store the memory allocated
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@param Units Number of memory units to allocate
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@return EFI_SUCCESS : The needed memory is allocated
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@return EFI_NOT_FOUND : Can't find the free memory
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**/
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STATIC
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VOID *
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UsbHcAllocMemFromBlock (
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IN USBHC_MEM_BLOCK *Block,
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IN UINTN Units
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)
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{
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UINTN Byte;
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UINT8 Bit;
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UINTN StartByte;
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UINT8 StartBit;
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UINTN Available;
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UINTN Count;
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ASSERT ((Block != 0) && (Units != 0));
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StartByte = 0;
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StartBit = 0;
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Available = 0;
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for (Byte = 0, Bit = 0; Byte < Block->BitsLen;) {
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//
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// If current bit is zero, the corresponding memory unit is
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// available, otherwise we need to restart our searching.
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// Available counts the consective number of zero bit.
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//
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if (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit)) {
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Available++;
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if (Available >= Units) {
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break;
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}
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NEXT_BIT (Byte, Bit);
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} else {
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NEXT_BIT (Byte, Bit);
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Available = 0;
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StartByte = Byte;
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StartBit = Bit;
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}
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}
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if (Available < Units) {
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return NULL;
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}
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//
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// Mark the memory as allocated
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//
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Byte = StartByte;
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Bit = StartBit;
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for (Count = 0; Count < Units; Count++) {
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ASSERT (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));
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Block->Bits[Byte] |= USB_HC_BIT (Bit);
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NEXT_BIT (Byte, Bit);
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}
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return Block->Buf + (StartByte * 8 + StartBit) * USBHC_MEM_UNIT;
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}
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/**
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Insert the memory block to the pool's list of the blocks
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@param Head The head of the memory pool's block list
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@param Block The memory block to insert
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@return VOID
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**/
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STATIC
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VOID
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UsbHcInsertMemBlockToPool (
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IN USBHC_MEM_BLOCK *Head,
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IN USBHC_MEM_BLOCK *Block
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)
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{
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ASSERT ((Head != NULL) && (Block != NULL));
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Block->Next = Head->Next;
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Head->Next = Block;
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}
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/**
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Is the memory block empty?
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@param Block The memory block to check
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@return TRUE : The memory block is empty
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@return FALSE : The memory block isn't empty
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**/
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STATIC
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BOOLEAN
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UsbHcIsMemBlockEmpty (
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IN USBHC_MEM_BLOCK *Block
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)
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{
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UINTN Index;
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for (Index = 0; Index < Block->BitsLen; Index++) {
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if (Block->Bits[Index] != 0) {
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return FALSE;
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}
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}
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return TRUE;
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}
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/**
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Unlink the memory block from the pool's list
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@param Head The block list head of the memory's pool
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@param BlockToUnlink The memory block to unlink.
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@return VOID
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**/
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STATIC
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VOID
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UsbHcUnlinkMemBlock (
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IN USBHC_MEM_BLOCK *Head,
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IN USBHC_MEM_BLOCK *BlockToUnlink
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)
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{
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USBHC_MEM_BLOCK *Block;
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ASSERT ((Head != NULL) && (BlockToUnlink != NULL));
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for (Block = Head; Block != NULL; Block = Block->Next) {
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if (Block->Next == BlockToUnlink) {
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Block->Next = BlockToUnlink->Next;
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BlockToUnlink->Next = NULL;
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break;
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}
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}
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}
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/**
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Initialize the memory management pool for the host controller
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@param Pool The USB memory pool to initialize
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@param PciIo The PciIo that can be used to access the host controller
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@param Check4G Whether the host controller requires allocated memory
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from one 4G address space.
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@param Which4G The 4G memory area each memory allocated should be from
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@return EFI_SUCCESS : The memory pool is initialized
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@return EFI_OUT_OF_RESOURCE : Fail to init the memory pool
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**/
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USBHC_MEM_POOL *
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UsbHcInitMemPool (
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IN EFI_PCI_IO_PROTOCOL *PciIo,
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IN BOOLEAN Check4G,
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IN UINT32 Which4G
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)
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{
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USBHC_MEM_POOL *Pool;
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Pool = AllocatePool (sizeof (USBHC_MEM_POOL));
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if (Pool == NULL) {
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return Pool;
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}
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Pool->PciIo = PciIo;
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Pool->Check4G = Check4G;
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Pool->Which4G = Which4G;
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Pool->Head = UsbHcAllocMemBlock (Pool, USBHC_MEM_DEFAULT_PAGES);
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if (Pool->Head == NULL) {
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gBS->FreePool (Pool);
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Pool = NULL;
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}
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return Pool;
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}
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/**
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Release the memory management pool
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@param Pool The USB memory pool to free
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@return EFI_SUCCESS : The memory pool is freed
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@return EFI_DEVICE_ERROR : Failed to free the memory pool
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**/
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EFI_STATUS
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UsbHcFreeMemPool (
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IN USBHC_MEM_POOL *Pool
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)
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{
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USBHC_MEM_BLOCK *Block;
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ASSERT (Pool->Head != NULL);
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//
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// Unlink all the memory blocks from the pool, then free them.
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// UsbHcUnlinkMemBlock can't be used to unlink and free the
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// first block.
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//
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for (Block = Pool->Head->Next; Block != NULL; Block = Pool->Head->Next) {
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UsbHcUnlinkMemBlock (Pool->Head, Block);
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UsbHcFreeMemBlock (Pool, Block);
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}
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UsbHcFreeMemBlock (Pool, Pool->Head);
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gBS->FreePool (Pool);
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return EFI_SUCCESS;
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}
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/**
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Allocate some memory from the host controller's memory pool
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which can be used to communicate with host controller.
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@param Pool The host controller's memory pool
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@param Size Size of the memory to allocate
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@return The allocated memory or NULL
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**/
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VOID *
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UsbHcAllocateMem (
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IN USBHC_MEM_POOL *Pool,
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IN UINTN Size
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)
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{
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USBHC_MEM_BLOCK *Head;
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USBHC_MEM_BLOCK *Block;
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USBHC_MEM_BLOCK *NewBlock;
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VOID *Mem;
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UINTN AllocSize;
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UINTN Pages;
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Mem = NULL;
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AllocSize = USBHC_MEM_ROUND (Size);
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Head = Pool->Head;
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ASSERT (Head != NULL);
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//
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// First check whether current memory blocks can satisfy the allocation.
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//
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for (Block = Head; Block != NULL; Block = Block->Next) {
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Mem = UsbHcAllocMemFromBlock (Block, AllocSize / USBHC_MEM_UNIT);
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if (Mem != NULL) {
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ZeroMem (Mem, Size);
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break;
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}
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}
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if (Mem != NULL) {
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return Mem;
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}
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//
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// Create a new memory block if there is not enough memory
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// in the pool. If the allocation size is larger than the
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// default page number, just allocate a large enough memory
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// block. Otherwise allocate default pages.
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//
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if (AllocSize > EFI_PAGES_TO_SIZE (USBHC_MEM_DEFAULT_PAGES)) {
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Pages = EFI_SIZE_TO_PAGES (AllocSize) + 1;
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} else {
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Pages = USBHC_MEM_DEFAULT_PAGES;
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}
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NewBlock = UsbHcAllocMemBlock (Pool, Pages);
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if (NewBlock == NULL) {
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DEBUG ((mUsbHcDebugLevel, "UsbHcAllocateMem: failed to allocate block\n"));
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return NULL;
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}
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//
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// Add the new memory block to the pool, then allocate memory from it
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//
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UsbHcInsertMemBlockToPool (Head, NewBlock);
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Mem = UsbHcAllocMemFromBlock (NewBlock, AllocSize / USBHC_MEM_UNIT);
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if (Mem != NULL) {
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ZeroMem (Mem, Size);
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}
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return Mem;
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}
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/**
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Free the allocated memory back to the memory pool
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@param Pool The memory pool of the host controller
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@param Mem The memory to free
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@param Size The size of the memory to free
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@return VOID
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**/
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VOID
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UsbHcFreeMem (
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IN USBHC_MEM_POOL *Pool,
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IN VOID *Mem,
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IN UINTN Size
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)
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{
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USBHC_MEM_BLOCK *Head;
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USBHC_MEM_BLOCK *Block;
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UINT8 *ToFree;
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UINTN AllocSize;
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UINTN Byte;
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UINTN Bit;
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UINTN Count;
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Head = Pool->Head;
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AllocSize = USBHC_MEM_ROUND (Size);
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ToFree = (UINT8 *) Mem;
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for (Block = Head; Block != NULL; Block = Block->Next) {
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//
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// scan the memory block list for the memory block that
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// completely contains the memory to free.
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//
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if ((Block->Buf <= ToFree) && ((ToFree + AllocSize) <= (Block->Buf + Block->BufLen))) {
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//
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// compute the start byte and bit in the bit array
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//
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Byte = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) / 8;
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Bit = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) % 8;
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//
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// reset associated bits in bit arry
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//
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for (Count = 0; Count < (AllocSize / USBHC_MEM_UNIT); Count++) {
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ASSERT (USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));
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Block->Bits[Byte] ^= (UINT8) USB_HC_BIT (Bit);
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NEXT_BIT (Byte, Bit);
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}
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break;
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||||
}
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}
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||||
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||||
//
|
||||
// If Block == NULL, it means that the current memory isn't
|
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// in the host controller's pool. This is critical because
|
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// the caller has passed in a wrong memory point
|
||||
//
|
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ASSERT (Block != NULL);
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||||
|
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//
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// Release the current memory block if it is empty and not the head
|
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//
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if ((Block != Head) && UsbHcIsMemBlockEmpty (Block)) {
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DEBUG ((mUsbHcDebugLevel, "UsbHcFreeMem: block %x is empty, recycle\n", Block));
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UsbHcUnlinkMemBlock (Head, Block);
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UsbHcFreeMemBlock (Pool, Block);
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||||
}
|
||||
|
||||
return ;
|
||||
}
|
||||
Reference in New Issue
Block a user