[PATCH 6.6.y 3/7] scsi: ufs: core: Add UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE

[Sasha Levin <sashal@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

[ Upstream commit e95881e0081a30e132b5ca087f1e07fc08608a7e ]

Add UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE which tells the UFS core to not use
the crypto enable bit defined by the UFS specification.  This is needed to
support inline encryption on the "Exynos" UFS controller.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20240708235330.103590-4-ebiggers@kernel.org
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: d34caa89a132 ("scsi: ufs: core: Add a quirk to suppress link_startup_again")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/ufs/core/ufshcd-crypto.c | 8 ++++++++
 include/ufs/ufshcd.h             | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c
index b4980fd91cee7..a714dad82cd1f 100644
--- a/drivers/ufs/core/ufshcd-crypto.c
+++ b/drivers/ufs/core/ufshcd-crypto.c
@@ -110,6 +110,10 @@ static int ufshcd_crypto_keyslot_evict(struct blk_crypto_profile *profile,
 	return ufshcd_program_key(hba, &cfg, slot);
 }
 
+/*
+ * Reprogram the keyslots if needed, and return true if CRYPTO_GENERAL_ENABLE
+ * should be used in the host controller initialization sequence.
+ */
 bool ufshcd_crypto_enable(struct ufs_hba *hba)
 {
 	if (!(hba->caps & UFSHCD_CAP_CRYPTO))
@@ -117,6 +121,10 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba)
 
 	/* Reset might clear all keys, so reprogram all the keys. */
 	blk_crypto_reprogram_all_keys(&hba->crypto_profile);
+
+	if (hba->quirks & UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE)
+		return false;
+
 	return true;
 }
 
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 21d03510efb66..3a3183dc899c3 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -651,6 +651,13 @@ enum ufshcd_quirks {
 	 * ufs_hba_variant_ops::init() must do it instead.
 	 */
 	UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE		= 1 << 22,
+
+	/*
+	 * This quirk needs to be enabled if the host controller supports inline
+	 * encryption but does not support the CRYPTO_GENERAL_ENABLE bit, i.e.
+	 * host controller initialization fails if that bit is set.
+	 */
+	UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE		= 1 << 23,
 };
 
 enum ufshcd_caps {
-- 
2.51.0