Messages in this thread | | | Date | Thu, 13 Sep 2007 09:25:57 -0700 | From | "Dan Williams" <> | Subject | Re: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xxprocessors. |
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On 9/13/07, Zhang Wei-r63237 <Wei.Zhang@freescale.com> wrote: > Hi, > > > > +static void fsl_dma_set_src(dma_addr_t addr, > > > + struct dma_async_tx_descriptor > > *tx, int index) > > > +{ > > > > What is index supposed to mean? It's not used, or documented > > anywhere than > > I can see. > > I've also got more document here. Hi, Dan, could you give me some > explanation about this API? :) > The index field gets used for multi-source (or multi-dest) operations. XOR, for example, is a multi-source operation. I am preparing a documentation patch.
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