Hi, this short series adds support for R-Car Gen-3 Internal DMAC to the SDHI driver. The approach taken is as follows: 1. Refactor the TMIO DMA code so that it is provided by a set of callbacks rather than compiled-in function calls; Refactor the DMA SDHI to use this. 2. Rename tmio_mmc_dma.c as renesas_sdhi_sysc_dmac.c which better reflects what it is is, particularly after step 2. 3. Add max_segs restriction 4. Add Gen3 DMA code as a separate set of callbacks Changes since v2: * Correct discrepancies with BSP v3.2.2 in intermal DMAC implementation. * Correctly set mmc->max_blk_count in accordance with max_segs. This appears to boost performance from ~4.7Mb/s to ~11Mb/s. * Allow fallback to PIO * Correct name of SYS DMAC Changes since v1: * Cleanup and more renaming as suggested by Wolfram Sang * max_segs restriction Testing: As described on http://elinux.org/Tests:r-car-gen3-sdhi-dma Previously performance of 4.7Mb/s was reported. With this series performance of 11Mb/s has been achieved. However, this is still lower than the 20Mb/s I originally expected. Simon Horman (3): mmc: sh_mobile_sdhi, tmio: make dma more modular mmc: sh_mobile_sdhi: rename DMA source file as renesas_sdhi_sys_dmac.c arm64: defconfig: Enable SDHI SD/SDIO controller Yoshihiro Shimoda (3): mmc: tmio: add max_segs and max_blk_count in tmio_mmc_data mmc: sh_mobile_sdhi: add some SoC specific data for R-Car Gen3 mmc: renesas_sdhi: add support for R-Car Gen3 SDHI DMAC arch/arm64/configs/defconfig | 1 + drivers/mmc/host/Kconfig | 18 ++ drivers/mmc/host/Makefile | 7 +- drivers/mmc/host/renesas_sdhi_internal_dmac.c | 196 +++++++++++++++++++++ .../{tmio_mmc_dma.c => renesas_sdhi_sys_dmac.c} | 53 ++++-- drivers/mmc/host/sh_mobile_sdhi.c | 41 +++++ drivers/mmc/host/tmio_mmc.h | 39 +--- drivers/mmc/host/tmio_mmc_pio.c | 53 +++++- include/linux/mfd/tmio.h | 2 + 9 files changed, 357 insertions(+), 53 deletions(-) create mode 100644 drivers/mmc/host/renesas_sdhi_internal_dmac.c rename drivers/mmc/host/{tmio_mmc_dma.c => renesas_sdhi_sys_dmac.c} (83%) -- 2.7.0.rc3.207.g0ac5344
