Working with Adapter Objects

Although the specific details vary with the nature of the device and the architecture of the driver, DMA drivers generally have to perform several kinds of operations on Adapter objects.

• Locate the Adapter object associated with the specific device.

• Acquire and release ownership of Adapter objects and their mapping registers.

• Load the Adapter object's mapping registers at the start of a transfer.

• Flush the Adapter object's cache after a transfer completes.