[PATCH 00/18] mmc: meson-gx: code and performance improvements

[PATCH 00/18] mmc: meson-gx: code and performance improvements

[Heiner Kallweit]

This patch series includes several improvements and boosted the
read performance from 13 MB/s to 32 MB/s (at 60MHz clock rate)
on a Odroid C2 with a 128GB eMMC module.

Higher frequencies needed tuning in my case. With some hacked
test tuning I reached 52 MB/s at 200MHz.
With a 8GB card 200MHz were stable out of the box, but with
less performacne.

Heiner Kallweit (18):
  mmc: meson-gx: set segment host parameters
  mmc: meson-gx: remove code for unsupported CMD23
  mmc: meson-gx: explicitely call stop command for multi-block commands only
  mmc: meson-gx: improve meson_mmc_start_cmd
  mmc: meson-gx: eliminate struct sd_emmc_data
  mmc: meson-gx: simplify bounce buffer setting in meson_mmc_start_cmd
  mmc: meson-gx: check return value of sg_copy_[from,to]_buffer
  mmc: meson-gx: make two functions return void
  mmc: meson-gx: change interrupt name
  mmc: meson-gx: remove unused members irq, ocr_mask from struct meson_host
  mmc: meson-gx: remove unneeded variable in meson_mmc_clk_init
  mmc: meson-gx: remove member parent_mux from struct meson_host
  mmc: meson-gx: remove unneeded meson_mmc_clk_set in meson_mmc_clk_init
  mmc: meson-gx: remove unneeded devm_kstrdup in meson_mmc_clk_init
  mmc: meson-gx: improve initial configuration
  mmc: meson-gx: improve response reading and sending stop command
  mmc: meson-gx: remove member mrq from struct meson_host
  mmc: meson-gx: move handling of one case from threaded handler to main irq

 drivers/mmc/host/meson-gx-mmc.c | 241 ++++++++++++++++------------------------
 1 file changed, 97 insertions(+), 144 deletions(-)

-- 
2.11.1

Re: [PATCH 00/18] mmc: meson-gx: code and performance improvements

[Kevin Hilman]

Hi Heiner,

Heiner Kallweit <hkallweit1@gmail.com> writes:

> This patch series includes several improvements and boosted the
> read performance from 13 MB/s to 32 MB/s (at 60MHz clock rate)
> on a Odroid C2 with a 128GB eMMC module.
>
> Higher frequencies needed tuning in my case. With some hacked
> test tuning I reached 52 MB/s at 200MHz.
> With a 8GB card 200MHz were stable out of the box, but with
> less performacne.

Thanks for the series and improvements.  I'm not very familiar with MMC,
so I've been hoping someone would come along and improve this driver.  I
really appreciate it.

There are a few comments I've made on individual patches in the series.

It will probably be helpful to the MMC maintainers if you separate the
series into:

- cleanups (non-functional changes)
- fixes: things that fix actual bugs (not sure there are any in this
  series)

followed by a series that does the functional changes.

Also, can I recommend that you use git-format-patch and git-send-email
to export and email your patches?  If you use git-send-email, all of the
individual patches will be sent as a reply to the cover-letter, making
the threading work better and generally make readers/reviewers happier.

Thanks again for the great work,

Kevin

> Heiner Kallweit (18):
>   mmc: meson-gx: set segment host parameters
>   mmc: meson-gx: remove code for unsupported CMD23
>   mmc: meson-gx: explicitely call stop command for multi-block commands only
>   mmc: meson-gx: improve meson_mmc_start_cmd
>   mmc: meson-gx: eliminate struct sd_emmc_data
>   mmc: meson-gx: simplify bounce buffer setting in meson_mmc_start_cmd
>   mmc: meson-gx: check return value of sg_copy_[from,to]_buffer
>   mmc: meson-gx: make two functions return void
>   mmc: meson-gx: change interrupt name
>   mmc: meson-gx: remove unused members irq, ocr_mask from struct meson_host
>   mmc: meson-gx: remove unneeded variable in meson_mmc_clk_init
>   mmc: meson-gx: remove member parent_mux from struct meson_host
>   mmc: meson-gx: remove unneeded meson_mmc_clk_set in meson_mmc_clk_init
>   mmc: meson-gx: remove unneeded devm_kstrdup in meson_mmc_clk_init
>   mmc: meson-gx: improve initial configuration
>   mmc: meson-gx: improve response reading and sending stop command
>   mmc: meson-gx: remove member mrq from struct meson_host
>   mmc: meson-gx: move handling of one case from threaded handler to main irq
>
>  drivers/mmc/host/meson-gx-mmc.c | 241 ++++++++++++++++------------------------
>  1 file changed, 97 insertions(+), 144 deletions(-)

Re: [PATCH 00/18] mmc: meson-gx: code and performance improvements

[Heiner Kallweit]

Am 15.02.2017 um 20:49 schrieb Kevin Hilman:
> Hi Heiner,
> 
> Heiner Kallweit <hkallweit1@gmail.com> writes:
> 
>> This patch series includes several improvements and boosted the
>> read performance from 13 MB/s to 32 MB/s (at 60MHz clock rate)
>> on a Odroid C2 with a 128GB eMMC module.
>>
>> Higher frequencies needed tuning in my case. With some hacked
>> test tuning I reached 52 MB/s at 200MHz.
>> With a 8GB card 200MHz were stable out of the box, but with
>> less performacne.
> 
> Thanks for the series and improvements.  I'm not very familiar with MMC,
> so I've been hoping someone would come along and improve this driver.  I
> really appreciate it.
> 
> There are a few comments I've made on individual patches in the series.
> 
> It will probably be helpful to the MMC maintainers if you separate the
> series into:
> 
> - cleanups (non-functional changes)
> - fixes: things that fix actual bugs (not sure there are any in this
>   series)
> 
> followed by a series that does the functional changes.
> 
Thanks for the review comments and indeed, the patches should be re-ordered.

> Also, can I recommend that you use git-format-patch and git-send-email
> to export and email your patches?  If you use git-send-email, all of the
> individual patches will be sent as a reply to the cover-letter, making
> the threading work better and generally make readers/reviewers happier.
> 
Uups, obviously something went wrong. The patch series was supposed to
be threaded together. I'll check ..

> Thanks again for the great work,
> 
> Kevin
> 
>> Heiner Kallweit (18):
>>   mmc: meson-gx: set segment host parameters
>>   mmc: meson-gx: remove code for unsupported CMD23
>>   mmc: meson-gx: explicitely call stop command for multi-block commands only
>>   mmc: meson-gx: improve meson_mmc_start_cmd
>>   mmc: meson-gx: eliminate struct sd_emmc_data
>>   mmc: meson-gx: simplify bounce buffer setting in meson_mmc_start_cmd
>>   mmc: meson-gx: check return value of sg_copy_[from,to]_buffer
>>   mmc: meson-gx: make two functions return void
>>   mmc: meson-gx: change interrupt name
>>   mmc: meson-gx: remove unused members irq, ocr_mask from struct meson_host
>>   mmc: meson-gx: remove unneeded variable in meson_mmc_clk_init
>>   mmc: meson-gx: remove member parent_mux from struct meson_host
>>   mmc: meson-gx: remove unneeded meson_mmc_clk_set in meson_mmc_clk_init
>>   mmc: meson-gx: remove unneeded devm_kstrdup in meson_mmc_clk_init
>>   mmc: meson-gx: improve initial configuration
>>   mmc: meson-gx: improve response reading and sending stop command
>>   mmc: meson-gx: remove member mrq from struct meson_host
>>   mmc: meson-gx: move handling of one case from threaded handler to main irq
>>
>>  drivers/mmc/host/meson-gx-mmc.c | 241 ++++++++++++++++------------------------
>>  1 file changed, 97 insertions(+), 144 deletions(-)
>