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mmc: core: Add parameter use_blk_mq

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Until mmc has blk-mq support fully implemented and tested, add a parameter
use_blk_mq, set to true if config option MMC_MQ_DEFAULT is selected, which
it is by default.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Adrian Hunter 2017-11-29 15:41:02 +02:00 committed by Ulf Hansson
parent 6d3898a6a5
commit c3d53d0da6
6 changed files with 26 additions and 0 deletions
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10
drivers/mmc/Kconfig
View File

@ -12,6 +12,16 @@ 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
default y
---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 MMC
source "drivers/mmc/core/Kconfig"

7
drivers/mmc/core/core.c
View File

@ -66,6 +66,13 @@ static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
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)
{

2
drivers/mmc/core/core.h
View File

@ -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);

2
drivers/mmc/core/host.c
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@ -404,6 +404,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
host->fixed_drv_type = -EINVAL;
host->use_blk_mq = mmc_use_blk_mq;
return host;
}

4
drivers/mmc/core/host.h
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@ -74,6 +74,10 @@ 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

1
include/linux/mmc/host.h
View File

@ -380,6 +380,7 @@ 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 */