[PATCH 4/6] scsi: ufs: exynos: Enable PRDT pre-fetching with UFSHCD_CAP_CRYPTO
From: Peter Griffin <peter.griffin@linaro.org>
Date: 2025-02-26 22:04:28
Also in:
linux-samsung-soc, linux-scsi, lkml
Subsystem:
scsi subsystem, the rest, universal flash storage host controller driver exynos hooks · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds, Alim Akhtar
PRDT_PREFETCH_ENABLE[31] bit should be set when desctype field of fmpsecurity0 register is type2 (double file encryption) or type3 (file and disk excryption). Setting this bit enables PRDT pre-fetching on both TXPRDT and RXPRDT. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> --- drivers/ufs/host/ufs-exynos.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index 943cea569f66..27eb360458a7 100644
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c@@ -1098,12 +1098,17 @@ static int exynos_ufs_post_link(struct ufs_hba *hba) struct exynos_ufs *ufs = ufshcd_get_variant(hba); struct phy *generic_phy = ufs->phy; struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; + u32 val = ilog2(DATA_UNIT_SIZE); exynos_ufs_establish_connt(ufs); exynos_ufs_fit_aggr_timeout(ufs); hci_writel(ufs, 0xa, HCI_DATA_REORDER); - hci_writel(ufs, ilog2(DATA_UNIT_SIZE), HCI_TXPRDT_ENTRY_SIZE); + + if (hba->caps & UFSHCD_CAP_CRYPTO) + val |= PRDT_PREFECT_EN; + hci_writel(ufs, val, HCI_TXPRDT_ENTRY_SIZE); + hci_writel(ufs, ilog2(DATA_UNIT_SIZE), HCI_RXPRDT_ENTRY_SIZE); hci_writel(ufs, (1 << hba->nutrs) - 1, HCI_UTRL_NEXUS_TYPE); hci_writel(ufs, (1 << hba->nutmrs) - 1, HCI_UTMRL_NEXUS_TYPE);
--
2.48.1.658.g4767266eb4-goog