// wdm.h

typedef enum _DMA_COMMON_BUFFER_EXTENDED_CONFIGURATION_TYPE {
  CommonBufferConfigTypeLogicalAddressLimits,
  CommonBufferConfigTypeSubSection,
  CommonBufferConfigTypeHardwareAccessPermissions,
  CommonBufferConfigTypeMax
} DMA_COMMON_BUFFER_EXTENDED_CONFIGURATION_TYPE, *PDMA_COMMON_BUFFER_EXTENDED_CONFIGURATION_TYPE;
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Windows Driver Kit DDI reference (ne-wdm-_dma_common_buffer_extended_configuration_type)

Description

Provides the types of optional configurations that can be provided when creating a common buffer from an MDL. The configuration values corresponding to the types are held in the DMA_COMMON_BUFFER_EXTENDED_CONFIGURATION structure.

Constants

`CommonBufferConfigTypeLogicalAddressLimits`

The associated configuration will contain information about the limits of logical address that can be used to fulfill common buffer creation.

`CommonBufferConfigTypeSubSection`

The associated configuration will contain information about the subsection within the MDL to use to create the common buffer.

`CommonBufferConfigTypeHardwareAccessPermissions`

The associated configuration will contain information about the access permissions for the hardware.

`CommonBufferConfigTypeMax`

The number of common buffer extended configuration values for this enumeration type that represent actual common buffer configuration types.

DMA_COMMON_BUFFER_EXTENDED_CONFIGURATION_TYPE - NtDoc