GET_LOCAL_HOST_INFO7_WXP - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// 1394.h

typedef struct _GET_LOCAL_HOST_INFO7_WXP {
  ULONG          HostDmaCapabilities;
  ULARGE_INTEGER MaxDmaBufferSize;
} GET_LOCAL_HOST_INFO7_WXP, *PGET_LOCAL_HOST_INFO7_WXP;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-1394-_get_local_host_info7_wxp)

_GET_LOCAL_HOST_INFO7_WXP structure

Description

The GET_LOCAL_HOST_INFO7 structure contains the data returned by a REQUEST_GET_LOCAL_HOST_INFO request with u.GetLocalHostInformation.nLevel set to GET_HOST_DMA_CAPABILITIES.

Members

HostDmaCapabilities

Always set to zero.

MaxDmaBufferSize

Specifies the maximum size of a single DMA transfer on the 1394 host controller. A value of 0x80001000 indicates that there is no specific maximum size. Otherwise, the value of MaxDmaBufferSize reflects the number of Map Registers that are available to the 1394 host controller to map DMA transfers. MaxDmaBufferSize is the upper limit for the size of the buffer that is described in a single ISOCH_DESCRIPTOR.

View the official Windows Driver Kit DDI reference

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