Queue Teardown - 3.4 English

Queue Tear-down (C2H Stream):

• Send marker packet to drain the pipeline.
• Wait for marker completion.
• Invalidate/clear prefetch context.
• Invalidate/clear completion context.
• Invalidate/clear descriptor software context.
• Invalidate timer context (clear cmd is not supported).

Queue Tear-down (H2C Stream & MM):

• Invalidate/clear descriptor software context.