// sercx.h

typedef enum _SERCX2_TRANSACTION_TYPE {
  SerCx2TransactionTypeDefault,
  SerCx2TransactionTypePio,
  SerCx2TransactionTypeSystemDma,
  SerCx2TransactionTypeCustom
} SERCX2_TRANSACTION_TYPE;
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (ne-sercx-_sercx2_transaction_type)

_SERCX2_TRANSACTION_TYPE enumeration

Description

The SERCX2_TRANSACTION_TYPE enumeration defines constants that indicate the type of data-transfer mechanism to use to perform an I/O transaction.

Constants

`SerCx2TransactionTypeDefault`

Let SerCx2 decide what type of data transfer to use for the I/O transaction.

`SerCx2TransactionTypePio`

Use programmed I/O (PIO) to perform the I/O transaction.

`SerCx2TransactionTypeSystemDma`

Use system DMA to perform the I/O transaction.

`SerCx2TransactionTypeCustom`

Use the custom data-transfer mechanism to perform the I/O transaction.

Remarks

The EvtSerCx2SelectNextReceiveTransactionType and EvtSerCx2SelectNextTransmitTransactionType event callback functions return SERCX2_TRANSACTION_TYPE enumeration values.

SERCX2_TRANSACTION_TYPE - NtDoc