| Message ID | 20241025131442.112862-8-peter.griffin@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | UFS cleanups and enhancements to ufs-exynos for gs101 | expand |
On 10/25/24 2:14 PM, Peter Griffin wrote: > Factor out the common code into a new exynos_ufs_shareability() function > and provide a dedicated gs101_drv_init() hook. > > This allows us to enable WriteBooster capability (UFSHCD_CAP_WB_EN) in a > way that doesn't effect other SoCs supported in this driver. > > WriteBooster improves write speeds by enabling a pseudo SLC cache. Using > the `fio seqwrite` test we can achieve speeds of 945MB/s with this feature > enabled (until the cache is exhausted) before dropping back to ~260MB/s > (which are the speeds we see without the WriteBooster feature enabled). > > Assuming the UFSHCD_CAP_WB_EN capability is set by the host then > WriteBooster can also be enabled and disabled via sysfs so it is possible > for the system to only enable it when extra write performance is required. > > Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> While reviewing this patch I noticed few cleanups can be made. I sent them here: https://lore.kernel.org/linux-scsi/20241030102715.3312308-1-tudor.ambarus@linaro.org/ Feel free to include them in your set if you're going to respin. Or not, if you don't want to tie your head with cleanup patches. I can respin them on top of yours later on.
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index d4e786afbbbc..40b2563fe011 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -203,7 +203,7 @@ static int exynos7_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) return 0; } -static int exynosauto_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) +static int exynos_ufs_shareability(struct exynos_ufs *ufs) { /* IO Coherency setting */ if (ufs->sysreg) { @@ -215,6 +215,21 @@ static int exynosauto_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) return 0; } +static int gs101_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) +{ + struct ufs_hba *hba = ufs->hba; + + /* Enable WriteBooster */ + hba->caps |= UFSHCD_CAP_WB_EN; + + return exynos_ufs_shareability(ufs); +} + +static int exynosauto_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) +{ + return exynos_ufs_shareability(ufs); +} + static int exynosauto_ufs_post_hce_enable(struct exynos_ufs *ufs) { struct ufs_hba *hba = ufs->hba; @@ -2124,7 +2139,7 @@ static const struct exynos_ufs_drv_data gs101_ufs_drvs = { .opts = EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR | EXYNOS_UFS_OPT_UFSPR_SECURE | EXYNOS_UFS_OPT_TIMER_TICK_SELECT, - .drv_init = exynosauto_ufs_drv_init, + .drv_init = gs101_ufs_drv_init, .pre_link = gs101_ufs_pre_link, .post_link = gs101_ufs_post_link, .pre_pwr_change = gs101_ufs_pre_pwr_change,
Factor out the common code into a new exynos_ufs_shareability() function and provide a dedicated gs101_drv_init() hook. This allows us to enable WriteBooster capability (UFSHCD_CAP_WB_EN) in a way that doesn't effect other SoCs supported in this driver. WriteBooster improves write speeds by enabling a pseudo SLC cache. Using the `fio seqwrite` test we can achieve speeds of 945MB/s with this feature enabled (until the cache is exhausted) before dropping back to ~260MB/s (which are the speeds we see without the WriteBooster feature enabled). Assuming the UFSHCD_CAP_WB_EN capability is set by the host then WriteBooster can also be enabled and disabled via sysfs so it is possible for the system to only enable it when extra write performance is required. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> --- drivers/ufs/host/ufs-exynos.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)