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authorEric Biggers <ebiggers@google.com>2021-01-25 21:38:07 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2021-02-01 14:02:33 +0300
commit433611ea8df3666845ecd3480c22667f065ea7af (patch)
tree03e9aa6e8c4fd57f2d42b1d17954e30b4532ad88 /drivers/firmware/qcom_scm.c
parent0a0c866f377ebea6ed5b65942cf1269651c21072 (diff)
downloadlinux-433611ea8df3666845ecd3480c22667f065ea7af.tar.xz
firmware: qcom_scm: update comment for ICE-related functions
The SCM calls QCOM_SCM_ES_INVALIDATE_ICE_KEY and QCOM_SCM_ES_CONFIG_SET_ICE_KEY are also needed for eMMC inline encryption support, not just for UFS. Update the comments accordingly. Reviewed-by: Satya Tangirala <satyat@google.com> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20210125183810.198008-7-ebiggers@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/firmware/qcom_scm.c')
-rw-r--r--drivers/firmware/qcom_scm.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 7be48c1bec96..f57779fc7ee9 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -965,8 +965,11 @@ EXPORT_SYMBOL(qcom_scm_ice_available);
* qcom_scm_ice_invalidate_key() - Invalidate an inline encryption key
* @index: the keyslot to invalidate
*
- * The UFSHCI standard defines a standard way to do this, but it doesn't work on
- * these SoCs; only this SCM call does.
+ * The UFSHCI and eMMC standards define a standard way to do this, but it
+ * doesn't work on these SoCs; only this SCM call does.
+ *
+ * It is assumed that the SoC has only one ICE instance being used, as this SCM
+ * call doesn't specify which ICE instance the keyslot belongs to.
*
* Return: 0 on success; -errno on failure.
*/
@@ -995,10 +998,13 @@ EXPORT_SYMBOL(qcom_scm_ice_invalidate_key);
* units, e.g. 1 = 512 bytes, 8 = 4096 bytes, etc.
*
* Program a key into a keyslot of Qualcomm ICE (Inline Crypto Engine), where it
- * can then be used to encrypt/decrypt UFS I/O requests inline.
+ * can then be used to encrypt/decrypt UFS or eMMC I/O requests inline.
+ *
+ * The UFSHCI and eMMC standards define a standard way to do this, but it
+ * doesn't work on these SoCs; only this SCM call does.
*
- * The UFSHCI standard defines a standard way to do this, but it doesn't work on
- * these SoCs; only this SCM call does.
+ * It is assumed that the SoC has only one ICE instance being used, as this SCM
+ * call doesn't specify which ICE instance the keyslot belongs to.
*
* Return: 0 on success; -errno on failure.
*/