tee: optee: discover services dependent on tee-supplicant

Makes OP-TEE to enumerate also services depending on tee-supplicant
support in U-Boot. This change allows OP-TEE services like fTPM TA
to be discovered and get a TPM device registered in U-Boot.

Signed-off-by: Etienne Carriere <[email protected]>
Reviewed-by: Ilias Apalodimas <[email protected]>
Reviewed-by: Jens Wiklander <[email protected]>
Signed-off-by: Ilias Apalodimas <[email protected]>

Author: etienne-lms

drivers/tee/optee/core.c

@@ -102,13 +102,14 @@ static int bind_service_list(struct udevice *dev, struct tee_shm *service_list,
 	return 0;
 }
 
-static int __enum_services(struct udevice *dev, struct tee_shm *shm, size_t *shm_size, u32 tee_sess)
+static int __enum_services(struct udevice *dev, struct tee_shm *shm, size_t *shm_size, u32 tee_sess,
+			   unsigned int pta_cmd)
 {
 	struct tee_invoke_arg arg = { };
 	struct tee_param param = { };
 	int ret = 0;
 
-	arg.func = PTA_CMD_GET_DEVICES;
+	arg.func = pta_cmd;
 	arg.session = tee_sess;
 
 	/* Fill invoke cmd params */
@@ -118,7 +119,7 @@ static int __enum_services(struct udevice *dev, struct tee_shm *shm, size_t *shm
 
 	ret = tee_invoke_func(dev, &arg, 1, &param);
 	if (ret || (arg.ret && arg.ret != TEE_ERROR_SHORT_BUFFER)) {
-		dev_err(dev, "PTA_CMD_GET_DEVICES invoke function err: 0x%x\n", arg.ret);
+		dev_err(dev, "Enumeration command 0x%x failed: 0x%x\n", pta_cmd, arg.ret);
 		return -EINVAL;
 	}
 
@@ -127,12 +128,13 @@ static int __enum_services(struct udevice *dev, struct tee_shm *shm, size_t *shm
 	return 0;
 }
 
-static int enum_services(struct udevice *dev, struct tee_shm **shm, size_t *count, u32 tee_sess)
+static int enum_services(struct udevice *dev, struct tee_shm **shm, size_t *count, u32 tee_sess,
+			 unsigned int pta_cmd)
 {
 	size_t shm_size = 0;
 	int ret;
 
-	ret = __enum_services(dev, NULL, &shm_size, tee_sess);
+	ret = __enum_services(dev, NULL, &shm_size, tee_sess, pta_cmd);
 	if (ret)
 		return ret;
 
@@ -142,7 +144,7 @@ static int enum_services(struct udevice *dev, struct tee_shm **shm, size_t *coun
 		return ret;
 	}
 
-	ret = __enum_services(dev, *shm, &shm_size, tee_sess);
+	ret = __enum_services(dev, *shm, &shm_size, tee_sess, pta_cmd);
 	if (!ret)
 		*count = shm_size / sizeof(struct tee_optee_ta_uuid);
 
@@ -174,20 +176,32 @@ static int bind_service_drivers(struct udevice *dev)
 	struct tee_shm *service_list = NULL;
 	size_t service_count;
 	u32 tee_sess;
-	int ret;
+	int ret, ret2;
 
 	ret = open_enum_session(dev, &tee_sess);
 	if (ret)
 		return ret;
 
-	ret = enum_services(dev, &service_list, &service_count, tee_sess);
+	ret = enum_services(dev, &service_list, &service_count, tee_sess,
+			    PTA_CMD_GET_DEVICES);
 	if (!ret)
 		ret = bind_service_list(dev, service_list, service_count);
 
 	tee_shm_free(service_list);
+
+	ret2 = enum_services(dev, &service_list, &service_count, tee_sess,
+			     PTA_CMD_GET_DEVICES_SUPP);
+	if (!ret2)
+		ret2 = bind_service_list(dev, service_list, service_count);
+
+	tee_shm_free(service_list);
+
 	tee_close_session(dev, tee_sess);
 
-	return ret;
+	if (ret)
+		return ret;
+
+	return ret2;
 }
 
 /**