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2e8b524c99
- Re-implement DMA buffer routines. It is now faster and consumes less memory overhead per allocated memory block. - IoGetDeviceProperty needs a PDO - Add few comments - No need to clear buffer twice in CreateQueueHead / CreateDescriptor svn path=/branches/cmake-bringup/; revision=51324
44 lines
920 B
C
44 lines
920 B
C
#pragma once
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#include "hardware.h"
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/* destroys memory allocator */
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VOID
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NTAPI
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DmaMemAllocator_Destroy(
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IN LPDMA_MEMORY_ALLOCATOR Allocator);
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/* create memory allocator */
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NTSTATUS
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NTAPI
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DmaMemAllocator_Create(
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IN LPDMA_MEMORY_ALLOCATOR *OutMemoryAllocator);
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/* initializes memory allocator */
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NTSTATUS
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NTAPI
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DmaMemAllocator_Initialize(
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IN OUT LPDMA_MEMORY_ALLOCATOR Allocator,
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IN ULONG DefaultBlockSize,
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IN PKSPIN_LOCK Lock,
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IN PHYSICAL_ADDRESS PhysicalBase,
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IN PVOID VirtualBase,
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IN ULONG Length);
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/* allocates memory from allocator */
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NTSTATUS
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NTAPI
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DmaMemAllocator_Allocate(
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IN LPDMA_MEMORY_ALLOCATOR Allocator,
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IN ULONG Size,
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OUT PVOID *OutVirtualAddress,
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OUT PPHYSICAL_ADDRESS OutPhysicalAddress);
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/* frees memory block from allocator */
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VOID
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NTAPI
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DmaMemAllocator_Free(
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IN LPDMA_MEMORY_ALLOCATOR Allocator,
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IN PVOID VirtualAddress,
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IN ULONG Size);
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