scsi: ufs: exynos: Enable PRDT pre-fetching with UFSHCD_CAP_CRYPTO

PRDT_PREFETCH_ENABLE[31] bit should be set when desctype field of
fmpsecurity0 register is type2 (double file encryption) or type3
(support for file and disk encryption). Setting this bit enables PRDT
pre-fetching on both TXPRDT and RXPRDT.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20250319-exynos-ufs-stability-fixes-v2-5-96722cc2ba1b@linaro.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index e77b3c63e69811527ea618e8399a699a4f9ee93a..ac71b878d872ff9c4a806a0025171cf70571e22e 100644 (file)
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -34,7 +34,7 @@
  * Exynos's Vendor specific registers for UFSHCI
  */
 #define HCI_TXPRDT_ENTRY_SIZE  0x00
-#define PRDT_PREFECT_EN                BIT(31)
+#define PRDT_PREFETCH_EN       BIT(31)
 #define HCI_RXPRDT_ENTRY_SIZE  0x04
 #define HCI_1US_TO_CNT_VAL     0x0C
 #define CNT_VAL_1US_MASK       0x3FF
@@ -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_PREFETCH_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);