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Clean up OMAP DMA lib and split into generic DMA lib based on PCI_IO DMA abstractions and make OMAP DMA lib about channel programming only.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10555 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2010-05-29 00:21:30 +00:00
parent 6be6c2e04d
commit 81bc205daf
11 changed files with 14 additions and 365 deletions
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248
Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c
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@@ -1,6 +1,6 @@
/** @file
OMAP35xx DMA abstractions modeled on PCI IO protocol. EnableDma()/DisableDma()
are from OMAP35xx TRM.
Abstractions for simple OMAP DMA channel.
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
@@ -17,28 +17,10 @@
#include <Base.h>
#include <Library/DebugLib.h>
#include <Library/OmapDmaLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UncachedMemoryAllocationLib.h>
#include <Library/IoLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/ArmLib.h>
#include <Omap3530/Omap3530.h>
#include <Protocol/Cpu.h>
typedef struct {
EFI_PHYSICAL_ADDRESS HostAddress;
EFI_PHYSICAL_ADDRESS DeviceAddress;
UINTN NumberOfBytes;
DMA_MAP_OPERATION Operation;
BOOLEAN DoubleBuffer;
} MAP_INFO_INSTANCE;
EFI_CPU_ARCH_PROTOCOL *gCpu;
UINTN gCacheAlignment = 0;
/**
Configure OMAP DMA Channel
@@ -192,229 +174,3 @@ DisableDmaChannel (
/**
Provides the DMA controller-specific addresses needed to access system memory.
Operation is relative to the DMA bus master.
@param Operation Indicates if the bus master is going to read or write to system memory.
@param HostAddress The system memory address to map to the DMA controller.
@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
that were mapped.
@param DeviceAddress The resulting map address for the bus master controller to use to
access the hosts HostAddress.
@param Mapping A resulting value to pass to Unmap().
@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
**/
EFI_STATUS
EFIAPI
DmaMap (
IN DMA_MAP_OPERATION Operation,
IN VOID *HostAddress,
IN OUT UINTN *NumberOfBytes,
OUT PHYSICAL_ADDRESS *DeviceAddress,
OUT VOID **Mapping
)
{
EFI_STATUS Status;
MAP_INFO_INSTANCE *Map;
VOID *Buffer;
if ( HostAddress == NULL || NumberOfBytes == NULL ||
DeviceAddress == NULL || Mapping == NULL ) {
return EFI_INVALID_PARAMETER;
}
if (Operation >= MapOperationMaximum) {
return EFI_INVALID_PARAMETER;
}
*DeviceAddress = ConvertToPhysicalAddress (HostAddress);
// Remember range so we can flush on the other side
Map = AllocatePool (sizeof (MAP_INFO_INSTANCE));
if (Map == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*Mapping = Map;
if (((UINTN)HostAddress & (gCacheAlignment - 1)) != 0) {
Map->DoubleBuffer = TRUE;
Status = DmaAllocateBuffer (EfiBootServicesData, EFI_SIZE_TO_PAGES (*NumberOfBytes), &Buffer);
if (EFI_ERROR (Status)) {
return Status;
}
*DeviceAddress = (PHYSICAL_ADDRESS)(UINTN)Buffer;
} else {
Map->DoubleBuffer = FALSE;
}
*NumberOfBytes &= *NumberOfBytes & ~(gCacheAlignment - 1); // Only do it on full cache lines
Map->HostAddress = (UINTN)HostAddress;
Map->DeviceAddress = *DeviceAddress;
Map->NumberOfBytes = *NumberOfBytes;
Map->Operation = Operation;
if (Map->DoubleBuffer) {
if (Map->Operation == MapOperationBusMasterWrite) {
CopyMem ((VOID *)(UINTN)Map->DeviceAddress, (VOID *)(UINTN)Map->HostAddress, Map->NumberOfBytes);
}
} else {
// EfiCpuFlushTypeWriteBack, EfiCpuFlushTypeInvalidate
if (Map->Operation == MapOperationBusMasterWrite || Map->Operation == MapOperationBusMasterRead) {
gCpu->FlushDataCache (gCpu, (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, Map->NumberOfBytes, EfiCpuFlushTypeWriteBackInvalidate);
}
}
return EFI_SUCCESS;
}
/**
Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()
operation and releases any corresponding resources.
@param Mapping The mapping value returned from DmaMap*().
@retval EFI_SUCCESS The range was unmapped.
@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
**/
EFI_STATUS
EFIAPI
DmaUnmap (
IN VOID *Mapping
)
{
MAP_INFO_INSTANCE *Map;
if (Mapping == NULL) {
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
Map = (MAP_INFO_INSTANCE *)Mapping;
if (Map->DoubleBuffer) {
if (Map->Operation == MapOperationBusMasterRead) {
CopyMem ((VOID *)(UINTN)Map->HostAddress, (VOID *)(UINTN)Map->DeviceAddress, Map->NumberOfBytes);
}
DmaFreeBuffer (EFI_SIZE_TO_PAGES (Map->NumberOfBytes), (VOID *)(UINTN)Map->DeviceAddress);
} else {
if (Map->Operation == MapOperationBusMasterWrite) {
//
// Make sure we read buffer from uncached memory and not the cache
//
gCpu->FlushDataCache (gCpu, Map->HostAddress, Map->NumberOfBytes, EfiCpuFlushTypeInvalidate);
}
}
FreePool (Map);
return EFI_SUCCESS;
}
/**
Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.
mapping.
@param MemoryType The type of memory to allocate, EfiBootServicesData or
EfiRuntimeServicesData.
@param Pages The number of pages to allocate.
@param HostAddress A pointer to store the base system memory address of the
allocated range.
@retval EFI_SUCCESS The requested memory pages were allocated.
@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
MEMORY_WRITE_COMBINE and MEMORY_CACHED.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
**/
EFI_STATUS
EFIAPI
DmaAllocateBuffer (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
OUT VOID **HostAddress
)
{
if (HostAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
//
// We used uncached memory to keep coherency
//
if (MemoryType == EfiBootServicesData) {
*HostAddress = UncachedAllocatePages (Pages);
} else if (MemoryType != EfiRuntimeServicesData) {
*HostAddress = UncachedAllocateRuntimePages (Pages);
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
Frees memory that was allocated with DmaAllocateBuffer().
@param Pages The number of pages to free.
@param HostAddress The base system memory address of the allocated range.
@retval EFI_SUCCESS The requested memory pages were freed.
@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
was not allocated with DmaAllocateBuffer().
**/
EFI_STATUS
EFIAPI
DmaFreeBuffer (
IN UINTN Pages,
IN VOID *HostAddress
)
{
if (HostAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
UncachedFreePages (HostAddress, Pages);
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
OmapDmaLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
// Get the Cpu protocol for later use
Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&gCpu);
ASSERT_EFI_ERROR(Status);
gCacheAlignment = ArmDataCacheLineLength ();
return Status;
}