1 files changed, 124 insertions, 1 deletions

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 26cd0458aacd..e777b7cb9b12 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -1119,7 +1119,7 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 	if (ret) {
 		dev_err(__scm->dev,
 			"Assign memory protection call failed %d\n", ret);
-		return -EINVAL;
+		return ret;
 	}
 
 	*srcvm = next_vm;
@@ -1994,11 +1994,14 @@ static const struct of_device_id qcom_scm_qseecom_allowlist[] __maybe_unused = {
 	{ .compatible = "asus,vivobook-s15" },
 	{ .compatible = "asus,zenbook-a14-ux3407qa" },
 	{ .compatible = "asus,zenbook-a14-ux3407ra" },
+	{ .compatible = "dell,inspiron-14-plus-7441" },
+	{ .compatible = "dell,latitude-7455" },
 	{ .compatible = "dell,xps13-9345" },
 	{ .compatible = "hp,elitebook-ultra-g1q" },
 	{ .compatible = "hp,omnibook-x14" },
 	{ .compatible = "huawei,gaokun3" },
 	{ .compatible = "lenovo,flex-5g" },
+	{ .compatible = "lenovo,thinkbook-16" },
 	{ .compatible = "lenovo,thinkpad-t14s" },
 	{ .compatible = "lenovo,thinkpad-x13s", },
 	{ .compatible = "lenovo,yoga-slim7x" },
@@ -2006,6 +2009,7 @@ static const struct of_device_id qcom_scm_qseecom_allowlist[] __maybe_unused = {
 	{ .compatible = "microsoft,blackrock" },
 	{ .compatible = "microsoft,romulus13", },
 	{ .compatible = "microsoft,romulus15", },
+	{ .compatible = "qcom,hamoa-iot-evk" },
 	{ .compatible = "qcom,sc8180x-primus" },
 	{ .compatible = "qcom,x1e001de-devkit" },
 	{ .compatible = "qcom,x1e80100-crd" },
@@ -2094,6 +2098,122 @@ static int qcom_scm_qseecom_init(struct qcom_scm *scm)
 #endif /* CONFIG_QCOM_QSEECOM */
 
 /**
+ * qcom_scm_qtee_invoke_smc() - Invoke a QTEE object.
+ * @inbuf: start address of memory area used for inbound buffer.
+ * @inbuf_size: size of the memory area used for inbound buffer.
+ * @outbuf: start address of memory area used for outbound buffer.
+ * @outbuf_size: size of the memory area used for outbound buffer.
+ * @result: result of QTEE object invocation.
+ * @response_type: response type returned by QTEE.
+ *
+ * @response_type determines how the contents of @inbuf and @outbuf
+ * should be processed.
+ *
+ * Return: On success, return 0 or <0 on failure.
+ */
+int qcom_scm_qtee_invoke_smc(phys_addr_t inbuf, size_t inbuf_size,
+			     phys_addr_t outbuf, size_t outbuf_size,
+			     u64 *result, u64 *response_type)
+{
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_SMCINVOKE,
+		.cmd = QCOM_SCM_SMCINVOKE_INVOKE,
+		.owner = ARM_SMCCC_OWNER_TRUSTED_OS,
+		.args[0] = inbuf,
+		.args[1] = inbuf_size,
+		.args[2] = outbuf,
+		.args[3] = outbuf_size,
+		.arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_RW, QCOM_SCM_VAL,
+					 QCOM_SCM_RW, QCOM_SCM_VAL),
+	};
+	struct qcom_scm_res res;
+	int ret;
+
+	ret = qcom_scm_call(__scm->dev, &desc, &res);
+	if (ret)
+		return ret;
+
+	if (response_type)
+		*response_type = res.result[0];
+
+	if (result)
+		*result = res.result[1];
+
+	return 0;
+}
+EXPORT_SYMBOL(qcom_scm_qtee_invoke_smc);
+
+/**
+ * qcom_scm_qtee_callback_response() - Submit response for callback request.
+ * @buf: start address of memory area used for outbound buffer.
+ * @buf_size: size of the memory area used for outbound buffer.
+ * @result: Result of QTEE object invocation.
+ * @response_type: Response type returned by QTEE.
+ *
+ * @response_type determines how the contents of @buf should be processed.
+ *
+ * Return: On success, return 0 or <0 on failure.
+ */
+int qcom_scm_qtee_callback_response(phys_addr_t buf, size_t buf_size,
+				    u64 *result, u64 *response_type)
+{
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_SMCINVOKE,
+		.cmd = QCOM_SCM_SMCINVOKE_CB_RSP,
+		.owner = ARM_SMCCC_OWNER_TRUSTED_OS,
+		.args[0] = buf,
+		.args[1] = buf_size,
+		.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL),
+	};
+	struct qcom_scm_res res;
+	int ret;
+
+	ret = qcom_scm_call(__scm->dev, &desc, &res);
+	if (ret)
+		return ret;
+
+	if (response_type)
+		*response_type = res.result[0];
+
+	if (result)
+		*result = res.result[1];
+
+	return 0;
+}
+EXPORT_SYMBOL(qcom_scm_qtee_callback_response);
+
+static void qcom_scm_qtee_free(void *data)
+{
+	struct platform_device *qtee_dev = data;
+
+	platform_device_unregister(qtee_dev);
+}
+
+static void qcom_scm_qtee_init(struct qcom_scm *scm)
+{
+	struct platform_device *qtee_dev;
+	u64 result, response_type;
+	int ret;
+
+	/*
+	 * Probe for smcinvoke support. This will fail due to invalid buffers,
+	 * but first, it checks whether the call is supported in QTEE syscall
+	 * handler. If it is not supported, -EIO is returned.
+	 */
+	ret = qcom_scm_qtee_invoke_smc(0, 0, 0, 0, &result, &response_type);
+	if (ret == -EIO)
+		return;
+
+	/* Setup QTEE interface device. */
+	qtee_dev = platform_device_register_data(scm->dev, "qcomtee",
+						 PLATFORM_DEVID_NONE, NULL, 0);
+	if (IS_ERR(qtee_dev))
+		return;
+
+	devm_add_action_or_reset(scm->dev, qcom_scm_qtee_free, qtee_dev);
+}
+
+/**
  * qcom_scm_is_available() - Checks if SCM is available
  */
 bool qcom_scm_is_available(void)
@@ -2325,6 +2445,9 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	ret = qcom_scm_qseecom_init(scm);
 	WARN(ret < 0, "failed to initialize qseecom: %d\n", ret);
 
+	/* Initialize the QTEE object interface. */
+	qcom_scm_qtee_init(scm);
+
 	return 0;
 }