[RFC PATCH v8 0/10] Add external dma support for Synopsys MSHC

Sun Oct 4 18:36:32 PDT 2015

Hi, Shawn.

On 10/02/2015 06:49 PM, Shawn Lin wrote:
> On 2015/10/1 17:14, Jaehoon Chung wrote:
>> 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.
>>
> 
> Thanks, Jaehoon. :)
> 
> I guess it would be acceptable to pick the config changes, already they were acked by the soc maintainers, via dw_mmc tree when ulf merge dw_mmc tree into his mmc-tree.

Some patches didn't get the maintainer's acked-by. 
I will wait for that..until this week. How about?

Best Regards,
Jaehoon Chung

> 
> 
>> 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 at samsung.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 at samsung.com>" for exynos_defconfig patch
>>> - add "Acked-by: Vineet Gupta <vgupta at synopsys.com>" for axs10x_defconfig patch
>>> - add "Acked-by: Govindraj Raja <govindraj.raja at imgtec.com>" and
>>>    "Acked-by: Ralf Baechle <ralf at linux-mips.org>" for pistachio_defconfig patch
>>> - add "Acked-by: Joachim Eastwood <manabian at gmail.com>" for lpc18xx_defconfig patch
>>> - add "Acked-by: Wei Xu <xuwei5 at hisilicon.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(-)
>>>
>>
>>
>>
>>
> 
> 