[PATCH 02/12] dmaengine: add the async_tx api

From: Dan Williams [EMAIL PROTECTED] async_tx is an api to describe a series of bulk memory transfers/transforms. When possible these transactions are carried out by asynchrounous dma engines. The api handles inter-transaction dependencies and hides dma channel management from the client. When

[PATCH 02/12] dmaengine: add the async_tx api

From: Dan Williams [EMAIL PROTECTED] async_tx is an api to describe a series of bulk memory transfers/transforms. When possible these transactions are carried out by asynchrounous dma engines. The api handles inter-transaction dependencies and hides dma channel management from the client. When