6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Peter Griffin peter.griffin@linaro.org
[ Upstream commit 9cc4a4a5767756b1ebe45a76c4673432545ea70e ]
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 Link: https://lore.kernel.org/r/20241031150033.3440894-10-peter.griffin@linaro.org Reviewed-by: Tudor Ambarus tudor.ambarus@linaro.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Stable-dep-of: 68f5ef7eebf0 ("scsi: ufs: exynos: Move UFS shareability value to drvdata") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ufs/host/ufs-exynos.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index 8adf11f37c0d7..149c8127cf556 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -198,7 +198,7 @@ static inline void exynos_ufs_ungate_clks(struct exynos_ufs *ufs) exynos_ufs_ctrl_clkstop(ufs, false); }
-static int exynosauto_ufs_drv_init(struct exynos_ufs *ufs) +static int exynos_ufs_shareability(struct exynos_ufs *ufs) { struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr;
@@ -214,6 +214,21 @@ static int exynosauto_ufs_drv_init(struct exynos_ufs *ufs) return 0; }
+static int gs101_ufs_drv_init(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 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; @@ -2128,7 +2143,7 @@ static const struct exynos_ufs_drv_data gs101_ufs_drvs = { 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,