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Message-id: <560CF98B.7010609@samsung.com> Date: Thu, 01 Oct 2015 18:14:51 +0900 From: Jaehoon Chung <jh80.chung@...sung.com> To: Shawn Lin <shawn.lin@...k-chips.com>, ulf.hansson@...aro.org Cc: Vineet.Gupta1@...opsys.com, Wei Xu <xuwei5@...ilicon.com>, Joachim Eastwood <manabian@...il.com>, Alexey Brodkin <abrodkin@...opsys.com>, Kukjin Kim <kgene@...nel.org>, Krzysztof Kozlowski <k.kozlowski@...sung.com>, Russell King <linux@....linux.org.uk>, Jun Nie <jun.nie@...aro.org>, Ralf Baechle <ralf@...ux-mips.org>, Govindraj Raja <govindraj.raja@...tec.com>, Arnd Bergmann <arnd@...db.de>, heiko@...ech.de, dianders@...omium.org, linux-samsung-soc@...r.kernel.org, linux-mips@...ux-mips.org, linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, CPGS <cpgs@...sung.com> Subject: Re: [RFC PATCH v8 0/10] Add external dma support for Synopsys MSHC Dear, All. I will apply patch 01-03 at my repository on today. But i don't know better how i do about other patches relevant to config file. Best Regards, Jaehoon Chung On 09/16/2015 03:40 PM, Shawn Lin wrote: > Synopsys DesignWare mobile storage host controller supports three > types of transfer mode: pio, internal dma and external dma. However, > dw_mmc can only supports pio and internal dma now. Thus some platforms > using dw-mshc integrated with generic dma can't work in dma mode. So we > submit this patch to achieve it. > > And the config option, CONFIG_MMC_DW_IDMAC, was added by Will Newton > (commit:f95f3850) for the first version of dw_mmc and never be touched since > then. At that time dt-bindings hadn't been introduced into dw_mmc yet means > we should select CONFIG_MMC_DW_IDMAC to enable internal dma mode at compile > time. Nowadays, device-tree helps us to support a variety of boards with one > kernel. That's why we need to remove it and decide the transfer mode by reading > dw_mmc's HCON reg at runtime. > > This RFC patch needs lots of ACKs. I know it's hard, but it does need someone > to make the running. > > Patch does the following things: > - remove CONFIG_MMC_DW_IDMAC config option > - add bindings for edmac used by synopsys-dw-mshc > at runtime > - add edmac support for synopsys-dw-mshc > > Patch is based on next of git://git.linaro.org/people/ulf.hansson/mmc > > Test emmc throughput on my platform with edmac support and without edmac support(pio only) > iozone -L64 -S32 -azecwI -+n -r4k -r64k -r128k -s1g -i0 -i1 -i2 -f datafile -Rb out.xls > /mnt/result.txt > (light cpu loading, Direct IO, fixed line size, all pattern recycle, 1GB data in total) > ___________________________________________________________ > | external dma mode | > |-----------------------------------------------------------| > |blksz | Random Read | Random Write | Seq Read | Seq Write| > |-----------------------------------------------------------| > |4kB | 13953kB/s | 8602kB/s | 13672kB/s | 9785kB/s| > |-----------------------------------------------------------| > |64kB | 46058kB/s | 24794kB/s | 48058kB/s | 25418kB/s| > |-----------------------------------------------------------| > |128kB | 57026kB/s | 35117kB/s | 57375kB/s | 35183kB/s| > |-----------------------------------------------------------| > VS > ___________________________________________________________ > | pio mode | > |-----------------------------------------------------------| > |blksz | Random Read | Random Write | Seq Read | Seq Write| > |-----------------------------------------------------------| > |4kB | 11720kB/s | 8644kB/s | 11549kB/s | 9624kB/s| > |-----------------------------------------------------------| > |64kB | 21869kB/s | 24414kB/s | 22031kB/s | 27986kB/s| > |-----------------------------------------------------------| > |128kB | 23718kB/s | 34495kB/s | 24698kB/s | 34637kB/s| > |-----------------------------------------------------------| > > > Changes in v8: > - remove trans_mode variable > - remove unnecessary dma_ops check > - remove unnecessary comment > - fix coding style based on latest ulf's next > - add Acked-by: Jaehoon Chung <jh80.chung@...sung.com> > for HCON's changes > > Changes in v7: > - rebased on Ulf's next > - combine condition state > - elaborate more about DMA_INTERFACE > - define some macro for DMA_INERFACE value > - spilt HCON ops' changes into another patch > > Changes in v6: > - add trans_mode condition for IDMAC initialization > suggested by Heiko > - re-test my patch on rk3188 platform and update commit msg > - update performance of pio vs edmac in cover letter > > Changes in v5: > - add the title of cover letter > - fix typo of comment > - add macro for reading HCON register > - add "Acked-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>" for exynos_defconfig patch > - add "Acked-by: Vineet Gupta <vgupta@...opsys.com>" for axs10x_defconfig patch > - add "Acked-by: Govindraj Raja <govindraj.raja@...tec.com>" and > "Acked-by: Ralf Baechle <ralf@...ux-mips.org>" for pistachio_defconfig patch > - add "Acked-by: Joachim Eastwood <manabian@...il.com>" for lpc18xx_defconfig patch > - add "Acked-by: Wei Xu <xuwei5@...ilicon.com>" for hisi_defconfig patch > - rebase on "https://github.com/jh80chung/dw-mmc.git tags/dw-mmc-for-ulf-v4.2" for merging easily > > Changes in v4: > - remove "host->trans_mode" and use "host->use_dma" to indicate > transfer mode. > - remove all bt-bindings' changes since we don't need new properities. > - check transfer mode at runtime by reading HCON reg > - spilt defconfig changes for each sub-architecture > - fix the title of cover letter > - reuse some code for reducing code size > > Changes in v3: > - choose transfer mode at runtime > - remove all CONFIG_MMC_DW_IDMAC config option > - add supports-idmac property for some platforms > > Changes in v2: > - Fix typo of dev_info msg > - remove unused dmach from declaration of dw_mci_dma_slave > > Shawn Lin (10): > mmc: dw_mmc: Add external dma interface support > mmc: dw_mmc: use macro for HCON register operations > Documentation: synopsys-dw-mshc: add bindings for idmac and edmac > mips: pistachio_defconfig: remove CONFIG_MMC_DW_IDMAC > arc: axs10x_defconfig: remove CONFIG_MMC_DW_IDMAC > arm: exynos_defconfig: remove CONFIG_MMC_DW_IDMAC > arm: hisi_defconfig: remove CONFIG_MMC_DW_IDMAC > arm: lpc18xx_defconfig: remove CONFIG_MMC_DW_IDMAC > arm: multi_v7_defconfig: remove CONFIG_MMC_DW_IDMAC > arm: zx_defconfig: remove CONFIG_MMC_DW_IDMAC > > .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 25 ++ > arch/arc/configs/axs101_defconfig | 1 - > arch/arc/configs/axs103_defconfig | 1 - > arch/arc/configs/axs103_smp_defconfig | 1 - > arch/arm/configs/exynos_defconfig | 1 - > arch/arm/configs/hisi_defconfig | 1 - > arch/arm/configs/lpc18xx_defconfig | 1 - > arch/arm/configs/multi_v7_defconfig | 1 - > arch/arm/configs/zx_defconfig | 1 - > arch/mips/configs/pistachio_defconfig | 1 - > drivers/mmc/host/Kconfig | 11 +- > drivers/mmc/host/dw_mmc-pltfm.c | 2 + > drivers/mmc/host/dw_mmc.c | 272 +++++++++++++++++---- > drivers/mmc/host/dw_mmc.h | 9 + > include/linux/mmc/dw_mmc.h | 23 +- > 15 files changed, 276 insertions(+), 75 deletions(-) > -- 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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