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SubjectRe: [PATCH V9 09/15] mmc: core: Add parameter use_blk_mq
On 22 September 2017 at 14:36, Adrian Hunter <adrian.hunter@intel.com> wrote:
> Until mmc has blk-mq support fully implemented and tested, add a
> parameter use_blk_mq, default to false unless config option MMC_MQ_DEFAULT
> is selected.
>
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>

Thanks, applied for next!

Kind regards
Uffe

> ---
> drivers/mmc/Kconfig | 11 +++++++++++
> drivers/mmc/core/core.c | 7 +++++++
> drivers/mmc/core/core.h | 2 ++
> drivers/mmc/core/host.c | 2 ++
> drivers/mmc/core/host.h | 4 ++++
> include/linux/mmc/host.h | 1 +
> 6 files changed, 27 insertions(+)
>
> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
> index ec21388311db..98202934bd29 100644
> --- a/drivers/mmc/Kconfig
> +++ b/drivers/mmc/Kconfig
> @@ -12,6 +12,17 @@ menuconfig MMC
> If you want MMC/SD/SDIO support, you should say Y here and
> also to your specific host controller driver.
>
> +config MMC_MQ_DEFAULT
> + bool "MMC: use blk-mq I/O path by default"
> + depends on MMC && BLOCK
> + ---help---
> + This option enables the new blk-mq based I/O path for MMC block
> + devices by default. With the option the mmc_core.use_blk_mq
> + module/boot option defaults to Y, without it to N, but it can
> + still be overridden either way.
> +
> + If unsure say N.
> +
> if MMC
>
> source "drivers/mmc/core/Kconfig"
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 2ff614d4ffac..10d7101164e4 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -66,6 +66,13 @@
> bool use_spi_crc = 1;
> module_param(use_spi_crc, bool, 0);
>
> +#ifdef CONFIG_MMC_MQ_DEFAULT
> +bool mmc_use_blk_mq = true;
> +#else
> +bool mmc_use_blk_mq = false;
> +#endif
> +module_param_named(use_blk_mq, mmc_use_blk_mq, bool, S_IWUSR | S_IRUGO);
> +
> static int mmc_schedule_delayed_work(struct delayed_work *work,
> unsigned long delay)
> {
> diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
> index ba5a8fea0dc2..159b2ca301ec 100644
> --- a/drivers/mmc/core/core.h
> +++ b/drivers/mmc/core/core.h
> @@ -35,6 +35,8 @@ struct mmc_bus_ops {
> int (*reset)(struct mmc_host *);
> };
>
> +extern bool mmc_use_blk_mq;
> +
> void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
> void mmc_detach_bus(struct mmc_host *host);
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index ad88deb2e8f3..b624dbb6cd15 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -398,6 +398,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
> host->max_blk_size = 512;
> host->max_blk_count = PAGE_SIZE / 512;
>
> + host->use_blk_mq = mmc_use_blk_mq;
> +
> return host;
> }
>
> diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h
> index 77d6f60d1bf9..170fe5947087 100644
> --- a/drivers/mmc/core/host.h
> +++ b/drivers/mmc/core/host.h
> @@ -69,6 +69,10 @@ static inline bool mmc_card_hs400es(struct mmc_card *card)
> return card->host->ios.enhanced_strobe;
> }
>
> +static inline bool mmc_host_use_blk_mq(struct mmc_host *host)
> +{
> + return host->use_blk_mq;
> +}
>
> #endif
>
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index c296f4351c1d..9109265fe529 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -378,6 +378,7 @@ struct mmc_host {
> unsigned int doing_retune:1; /* re-tuning in progress */
> unsigned int retune_now:1; /* do re-tuning at next req */
> unsigned int retune_paused:1; /* re-tuning is temporarily disabled */
> + unsigned int use_blk_mq:1; /* use blk-mq */
>
> int rescan_disable; /* disable card detection */
> int rescan_entered; /* used with nonremovable devices */
> --
> 1.9.1
>

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