- \r
-**/
-EFI_STATUS
-EFIAPI
-DisableDmaChannel (
- IN UINTN Channel,
- IN UINT32 SuccessMask,
- IN UINT32 ErrorMask
- );
-
-
-/** \r
- Provides the DMA controller-specific addresses needed to access system memory.\r
- \r
- Operation is relative to the DMA bus master.\r
- \r
- @param Operation Indicates if the bus master is going to read or write to system memory.\r
- @param HostAddress The system memory address to map to the DMA controller.\r
- @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r
- that were mapped. \r
- @param DeviceAddress The resulting map address for the bus master controller to use to\r
- access the hosts HostAddress. \r
- @param Mapping A resulting value to pass to Unmap().\r
- \r
- @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r
- @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer. \r
- @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
- @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r
- @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r
- \r
-**/
-EFI_STATUS
-EFIAPI
-DmaMap (
- IN DMA_MAP_OPERATION Operation,
- IN VOID *HostAddress,\r
- IN OUT UINTN *NumberOfBytes,\r
- OUT PHYSICAL_ADDRESS *DeviceAddress,\r
- OUT VOID **Mapping\r
- );
-
-
-
-
-/** \r
- Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()\r
- operation and releases any corresponding resources.\r
- \r
- @param Mapping The mapping value returned from DmaMap*().\r
- \r
- @retval EFI_SUCCESS The range was unmapped.\r
- @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r
- \r
-**/
-EFI_STATUS
-EFIAPI
-DmaUnmap (
- IN VOID *Mapping\r
- );
-
-
-/** \r
- Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.\r
- mapping. \r
- \r
- @param MemoryType The type of memory to allocate, EfiBootServicesData or\r
- EfiRuntimeServicesData. \r
- @param Pages The number of pages to allocate. \r
- @param HostAddress A pointer to store the base system memory address of the\r
- allocated range. \r
-\r
- @retval EFI_SUCCESS The requested memory pages were allocated.\r
- @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r
- MEMORY_WRITE_COMBINE and MEMORY_CACHED. \r
- @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
- @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated. \r
- \r
-**/
-EFI_STATUS
-EFIAPI
-DmaAllocateBuffer (
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN Pages,\r
- OUT VOID **HostAddress\r
- );\r
-
-
-/** \r
- Frees memory that was allocated with DmaAllocateBuffer().\r
- \r
- @param Pages The number of pages to free. \r
- @param HostAddress The base system memory address of the allocated range. \r
- \r
- @retval EFI_SUCCESS The requested memory pages were freed.\r
- @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r
- was not allocated with DmaAllocateBuffer().\r
- \r