linux-kernel - [PATCH v5 10/15] ufs: host: wrapped keys support in ufs qcom

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Date: Sun, 16 Jun 2024 17:51:05 -0700
From: Gaurav Kashyap <quic_gaurkash@...cinc.com>
To: <linux-arm-msm@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
        <andersson@...nel.org>, <ebiggers@...gle.com>,
        <neil.armstrong@...aro.org>, <srinivas.kandagatla@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <robh+dt@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <kernel@...cinc.com>, <linux-crypto@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <quic_omprsing@...cinc.com>,
        <quic_nguyenb@...cinc.com>, <bartosz.golaszewski@...aro.org>,
        <konrad.dybcio@...aro.org>, <ulf.hansson@...aro.org>,
        <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>, <mani@...nel.org>,
        <davem@...emloft.net>, <herbert@...dor.apana.org.au>,
        <psodagud@...cinc.com>, <quic_apurupa@...cinc.com>,
        <sonalg@...cinc.com>, Gaurav Kashyap
	<quic_gaurkash@...cinc.com>
Subject: [PATCH v5 10/15] ufs: host: wrapped keys support in ufs qcom

Use the wrapped keys quirk when hwkm is supported/used.
Whether to use HWKM or not would be decided during an ICE
probe, and based on this information, UFS can decide to use
wrapped keys or standard keys.

Also, propagate the appropriate key size to the ICE driver
when wrapped keys are used.

Tested-by: Neil Armstrong <neil.armstrong@...aro.org>
Reviewed-by: Om Prakash Singh <quic_omprsing@...cinc.com>
Signed-off-by: Gaurav Kashyap <quic_gaurkash@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 82584bb318fb..16f846f4a0c3 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -129,6 +129,8 @@ static int ufs_qcom_ice_init(struct ufs_qcom_host *host)
 
 	host->ice = ice;
 	hba->caps |= UFSHCD_CAP_CRYPTO;
+	if (qcom_ice_hwkm_supported(host->ice))
+		hba->quirks |= UFSHCD_QUIRK_USES_WRAPPED_CRYPTO_KEYS;
 
 	return 0;
 }
@@ -166,7 +168,11 @@ static int ufs_qcom_ice_program_key(struct ufs_hba *hba,
 	    cap.key_size != UFS_CRYPTO_KEY_SIZE_256)
 		return -EOPNOTSUPP;
 
-	ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_256;
+	if (bkey->crypto_cfg.key_type == BLK_CRYPTO_KEY_TYPE_HW_WRAPPED)
+		ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_WRAPPED;
+	else
+		ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_256;
+
 	if (config_enable)
 		return qcom_ice_program_key(host->ice,
 					    QCOM_ICE_CRYPTO_ALG_AES_XTS,
-- 
2.43.0