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Date: Thu, 8 Mar 2012 15:35:11 -0500 From: Alexandre Bounine <alexandre.bounine@....com> To: vinod.koul@...el.com, dan.j.williams@...el.com, linux@....linux.org.uk, linux-kernel@...r.kernel.org Cc: Alexandre Bounine <alexandre.bounine@....com>, jaswinder.singh@...aro.org, linus.walleij@...ricsson.com, leoli@...escale.com, zw@...kernel.org, STEricsson_nomadik_linux@...t.st.com, ben-linux@...ff.org, kgene.kim@...sung.com, mchehab@...radead.org, ludovic.desroches@...el.com, cjb@...top.org, g.liakhovetski@....de, ian@...menth.co.uk, dwmw2@...radead.org, grant.likely@...retlab.ca, alan@...ux.intel.com, balbi@...com, FlorianSchandinat@....de, perex@...ex.cz, tiwai@...e.de, viresh.kumar@...com, baohua.song@....com, srinidhi.kasagar@...ricsson.com Subject: [PATCH 0/2 V2] dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic As we agreed during our discussion about adding DMA Engine support for RapidIO subsystem [1], RapidIO and similar clients may benefit from adding an extra context parameter to device_prep_slave_sg() and device_prep_dma_cyclic() interfaces. Adding the context parameter will allow to pass client/target specific information associated with an individual data transfer request. In the case of RapidIO support this additional information consists of target destination ID and its buffer address (which is not mapped into the local CPU memory space). Because a single RapidIO-capable DMA channel may queue data transfer requests to different target devices, the per-request configuration is required. This set of patches presents changes to DMA_SLAVE and DMA_CYCLIC interfaces [2] and corresponding changes to all affected current drivers/clients. V.2 of the patches is reworked to implement wrappers and use staged approach as proposed by Russell King [3]. DMA Engine support for RapidIO and device-specific driver for Tsi721 PCIe-to-SRIO bridge will follow as a separate set of patches. [1] https://lkml.org/lkml/2011/10/24/275 [2] https://lkml.org/lkml/2012/1/30/624 [3] https://lkml.org/lkml/2012/2/3/269 Alexandre Bounine (2): dmaengine/dma_slave: introduce inline wrappers dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic arch/arm/plat-nomadik/include/plat/ste_dma40.h | 3 +- arch/arm/plat-samsung/dma-ops.c | 4 +- drivers/dma/amba-pl08x.c | 2 +- drivers/dma/at_hdmac.c | 7 ++++- drivers/dma/coh901318.c | 2 +- drivers/dma/dw_dmac.c | 2 +- drivers/dma/ep93xx_dma.c | 6 +++- drivers/dma/fsldma.c | 4 ++- drivers/dma/imx-dma.c | 5 ++- drivers/dma/imx-sdma.c | 5 ++- drivers/dma/intel_mid_dma.c | 3 +- drivers/dma/ipu/ipu_idmac.c | 3 +- drivers/dma/mxs-dma.c | 5 ++- drivers/dma/pch_dma.c | 3 +- drivers/dma/pl330.c | 5 ++- drivers/dma/shdma.c | 3 +- drivers/dma/sirf-dma.c | 2 +- drivers/dma/ste_dma40.c | 5 ++- drivers/dma/timb_dma.c | 3 +- drivers/dma/txx9dmac.c | 2 +- drivers/media/video/mx3_camera.c | 2 +- drivers/media/video/timblogiw.c | 2 +- drivers/mmc/host/atmel-mci.c | 2 +- drivers/mmc/host/mmci.c | 2 +- drivers/mmc/host/mxcmmc.c | 2 +- drivers/mmc/host/mxs-mmc.c | 2 +- drivers/mmc/host/sh_mmcif.c | 4 +- drivers/mmc/host/tmio_mmc_dma.c | 4 +- drivers/mtd/nand/gpmi-nand/gpmi-lib.c | 25 ++++++++++------------- drivers/net/ethernet/micrel/ks8842.c | 4 +- drivers/spi/spi-dw-mid.c | 4 +- drivers/spi/spi-ep93xx.c | 4 +- drivers/spi/spi-pl022.c | 4 +- drivers/spi/spi-topcliff-pch.c | 4 +- drivers/tty/serial/amba-pl011.c | 6 +--- drivers/tty/serial/pch_uart.c | 4 +- drivers/tty/serial/sh-sci.c | 4 +- drivers/usb/musb/ux500_dma.c | 3 +- drivers/usb/renesas_usbhs/fifo.c | 5 +-- drivers/video/mx3fb.c | 4 +- include/linux/dmaengine.h | 24 ++++++++++++++++++++-- sound/soc/ep93xx/ep93xx-pcm.c | 3 +- sound/soc/imx/imx-pcm-dma-mx2.c | 2 +- sound/soc/mxs/mxs-pcm.c | 2 +- sound/soc/sh/siu_pcm.c | 4 +- sound/soc/txx9/txx9aclc.c | 2 +- 46 files changed, 114 insertions(+), 88 deletions(-) -- 1.7.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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