firmware: qcom_scm: add two scm calls for iommu secure page table

Those two new SCM calls are needed from qcom-iommu driver in order
to initialize secure iommu page table.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
index 550e3a34e260..6e6d561708e2 100644
--- a/drivers/firmware/qcom_scm-64.c
+++ b/drivers/firmware/qcom_scm-64.c
@@ -397,3 +397,45 @@ int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
 
 	return ret ? : res.a1;
 }
+
+int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
+				      size_t *size)
+{
+	struct qcom_scm_desc desc = {0};
+	struct arm_smccc_res res;
+	int ret;
+
+	desc.args[0] = spare;
+	desc.arginfo = QCOM_SCM_ARGS(1);
+
+	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
+			    QCOM_SCM_IOMMU_SECURE_PTBL_SIZE, &desc, &res);
+
+	if (size)
+		*size = res.a1;
+
+	return ret ? : res.a2;
+}
+
+int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
+				      u32 spare)
+{
+	struct qcom_scm_desc desc = {0};
+	struct arm_smccc_res res;
+	int ret;
+
+	desc.args[0] = addr;
+	desc.args[1] = size;
+	desc.args[2] = spare;
+	desc.arginfo = QCOM_SCM_ARGS(3, QCOM_SCM_RW, QCOM_SCM_VAL,
+				     QCOM_SCM_VAL);
+
+	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
+			    QCOM_SCM_IOMMU_SECURE_PTBL_INIT, &desc, &res);
+
+	/* the pg table has been initialized already, ignore the error */
+	if (ret == -EPERM)
+		ret = 0;
+
+	return ret;
+}