| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Driver for Qualcomm Secure Execution Environment (SEE) interface (QSEECOM). |
| * Responsible for setting up and managing QSEECOM client devices. |
| * |
| * Copyright (C) 2023 Maximilian Luz <luzmaximilian@gmail.com> |
| */ |
| |
| #ifndef __QCOM_QSEECOM_H |
| #define __QCOM_QSEECOM_H |
| |
| #include <linux/auxiliary_bus.h> |
| #include <linux/types.h> |
| |
| #include <linux/firmware/qcom/qcom_scm.h> |
| |
| /** |
| * struct qseecom_client - QSEECOM client device. |
| * @aux_dev: Underlying auxiliary device. |
| * @app_id: ID of the loaded application. |
| */ |
| struct qseecom_client { |
| struct auxiliary_device aux_dev; |
| u32 app_id; |
| }; |
| |
| /** |
| * qcom_qseecom_app_send() - Send to and receive data from a given QSEE app. |
| * @client: The QSEECOM client associated with the target app. |
| * @req: Request buffer sent to the app (must be DMA-mappable). |
| * @req_size: Size of the request buffer. |
| * @rsp: Response buffer, written to by the app (must be DMA-mappable). |
| * @rsp_size: Size of the response buffer. |
| * |
| * Sends a request to the QSEE app associated with the given client and read |
| * back its response. The caller must provide two DMA memory regions, one for |
| * the request and one for the response, and fill out the @req region with the |
| * respective (app-specific) request data. The QSEE app reads this and returns |
| * its response in the @rsp region. |
| * |
| * Note: This is a convenience wrapper around qcom_scm_qseecom_app_send(). |
| * Clients should prefer to use this wrapper. |
| * |
| * Return: Zero on success, nonzero on failure. |
| */ |
| static inline int qcom_qseecom_app_send(struct qseecom_client *client, void *req, size_t req_size, |
| void *rsp, size_t rsp_size) |
| { |
| return qcom_scm_qseecom_app_send(client->app_id, req, req_size, rsp, rsp_size); |
| } |
| |
| #endif /* __QCOM_QSEECOM_H */ |