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GET_LOCAL_HOST_INFO7_WXP structure (1394.h)

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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.

Syntax

typedef struct _GET_LOCAL_HOST_INFO7_WXP {
  ULONG          HostDmaCapabilities;
  ULARGE_INTEGER MaxDmaBufferSize;
} GET_LOCAL_HOST_INFO7_WXP, *PGET_LOCAL_HOST_INFO7_WXP;

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.

Requirements

Requirement Value
Header 1394.h (include 1394.h)