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ada1682d60
The qseecom header does not contain ifdef guards against multiple
inclusion. Add them.
Fixes: 00b1248606 ("firmware: qcom_scm: Add support for Qualcomm Secure Execution Environment SCM interface")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20231004185732.98621-1-brgl@bgdev.pl
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Driver for Qualcomm Secure Execution Environment (SEE) interface (QSEECOM).
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* Responsible for setting up and managing QSEECOM client devices.
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*
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* Copyright (C) 2023 Maximilian Luz <luzmaximilian@gmail.com>
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*/
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#ifndef __QCOM_QSEECOM_H
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#define __QCOM_QSEECOM_H
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#include <linux/auxiliary_bus.h>
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#include <linux/types.h>
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#include <linux/firmware/qcom/qcom_scm.h>
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/**
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* struct qseecom_client - QSEECOM client device.
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* @aux_dev: Underlying auxiliary device.
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* @app_id: ID of the loaded application.
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*/
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struct qseecom_client {
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struct auxiliary_device aux_dev;
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u32 app_id;
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};
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/**
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* qcom_qseecom_app_send() - Send to and receive data from a given QSEE app.
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* @client: The QSEECOM client associated with the target app.
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* @req: Request buffer sent to the app (must be DMA-mappable).
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* @req_size: Size of the request buffer.
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* @rsp: Response buffer, written to by the app (must be DMA-mappable).
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* @rsp_size: Size of the response buffer.
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*
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* Sends a request to the QSEE app associated with the given client and read
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* back its response. The caller must provide two DMA memory regions, one for
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* the request and one for the response, and fill out the @req region with the
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* respective (app-specific) request data. The QSEE app reads this and returns
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* its response in the @rsp region.
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*
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* Note: This is a convenience wrapper around qcom_scm_qseecom_app_send().
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* Clients should prefer to use this wrapper.
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*
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* Return: Zero on success, nonzero on failure.
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*/
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static inline int qcom_qseecom_app_send(struct qseecom_client *client, void *req, size_t req_size,
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void *rsp, size_t rsp_size)
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{
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return qcom_scm_qseecom_app_send(client->app_id, req, req_size, rsp, rsp_size);
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}
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#endif /* __QCOM_QSEECOM_H */
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