On Thu, Jun 26, 2008 at 6:23 AM, Haavard Skinnemoen <haavard.skinnemoen@xxxxxxxxx> wrote: > First of all, I'm sorry it went so much time between v3 and v4 of this > patchset. I was hoping to finish this stuff up before all kinds of > other tasks started demanding my attention, but I didn't, so I had to > put it on hold for a while. Let's try again... > > This patchset extends the DMA engine API to allow drivers to offer DMA > to and from I/O registers with hardware handshaking, aka slave DMA. > Such functionality is very common in DMA controllers integrated on SoC > devices, and it's typically used to do DMA transfers to/from other > on-SoC peripherals, but it can often do DMA transfers to/from > externally connected devices as well (e.g. IDE hard drives). > > The main differences from v3 of this patchset are: > * A DMA descriptor can hold a whole scatterlist. This means that > clients using slave DMA can submit large requests in a single call > to the driver, and they only need to keep track of a single > descriptor. > * The dma_slave_descriptor struct is gone since clients no longer > need to keep track of multiple descriptors. > * The drivers perform better and are more stable. > > The dw_dmac driver depends on this patch: > > http://lkml.org/lkml/2008/6/25/148 > > and the atmel-mci driver depends on this series: > > http://lkml.org/lkml/2008/6/26/158 > > as well as all preceding patches in this series, of course. > > Comments are welcome, as usual! Shortlog and diffstat follow. > > Haavard Skinnemoen (6): > dmaengine: Add dma_client parameter to device_alloc_chan_resources Applied. I fixed it up for fsldma and mv_xor. > dmaengine: Add dma_chan_is_in_use() function I applied the chan->client_count patch that we talked about. > dmaengine: Add slave DMA interface There were some comments to the change log and other fixes, so I'll wait for v5 of this patch. > dmaengine: Make DMA Engine menu visible for AVR32 users Applied the "remove arch dependency in drivers/dma/Kconfig" instead. > dmaengine: Driver for the Synopsys DesignWare DMA controller > Atmel MCI: Driver for Atmel on-chip MMC controllers I will wait for v5 on these as well for the chan->client_count fixups and a response to the dma_unmap situation. Thanks, Dan -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
