130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
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/*
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* Tegra capture IVC driver.
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*
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* Copyright (c) 2017-2021, NVIDIA CORPORATION. All rights reserved.
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*
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* NVIDIA CORPORATION and its licensors retain all intellectual property
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* and proprietary rights in and to this software, related documentation
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* and any modifications thereto. Any use, reproduction, disclosure or
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* distribution of this software and related documentation without an express
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* license agreement from NVIDIA CORPORATION is strictly prohibited.
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*/
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#ifndef INCLUDE_CAPTURE_IVC_H
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#define INCLUDE_CAPTURE_IVC_H
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#include <linux/types.h>
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/*
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* Submit the control message binary blob to capture-IVC driver,
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* which is to be transfered over control IVC channel to RTCPU.
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*
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* @param[in] control_desc: binary blob containing control message descriptor,
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* is opaque to capture-IVC driver.
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* @param[in] len: size of control_desc.
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*/
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int tegra_capture_ivc_control_submit(const void *control_desc, size_t len);
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/*
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* Submit the capture message binary blob to capture-IVC driver,
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* which is to be transfered over capture IVC channel to RTCPU.
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*
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* @param[in] capture_desc: binary blob containing capture message descriptor,
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* is opaque to KMDs.
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* @param[in] len: size of capture_desc.
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*/
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int tegra_capture_ivc_capture_submit(const void *capture_desc, size_t len);
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/*
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* Callback function to be registered by client to receive the rtcpu
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* notifications through control or capture IVC channel.
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*
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* @param[in] resp_desc: binary blob containing the response message received
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* from rtcpu through control or capture IVC channel, its opaque to KMDs.
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* @param[in] priv_context: Client's private context, opaque to
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* capture-IVC driver.
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*/
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typedef void (*tegra_capture_ivc_cb_func)(const void *resp_desc,
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const void *priv_context);
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/*
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* Register callback function to receive response messages from rtcpu through
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* control IVC channel.
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*
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* @param[in] control_resp_cb: callback function to be registered for
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* control IVC channel.
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* @param[in] priv_context: client's private context, opaque to
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* capture-IVC driver.
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* @param[out] trans_id: temporary id assigned by capture-IVC driver, for the
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* clients whose unique chan_id is not yet allocated by RTCPU, to match their
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* responses with the requests.
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*
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*/
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int tegra_capture_ivc_register_control_cb(
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tegra_capture_ivc_cb_func control_resp_cb,
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uint32_t *trans_id, const void *priv_context);
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/*
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* Notify client’s channel ID to capture-IVC driver.
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*
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* Once client gets the newly allocated channel ID from RTCPU, it has to
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* notify it to capture-IVC driver also, so that it can replace the temporary
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* ID trans_id with the new channel ID chan_id in its internal context.
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* IVC driver uses this unique channel ID for mapping upcoming responses
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* with the client requests.
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*
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* @param[in] chan_id: new channel id allocated by RTCPU for the client,
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* capture-IVC driver uses to refer the client for its future control responses.
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* @param[in] trans_id: temporary id assigned by capture-IVC driver,
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* for the client.
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*/
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int tegra_capture_ivc_notify_chan_id(uint32_t chan_id, uint32_t trans_id);
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/*
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* Register callback function to receive status-indication messages from
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* rtcpu through capture IVC channel.
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*
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* @param[in] capture_status_ind_cb: callback function to be registered for
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* capture ivc channel.
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* @param[in] chan_id: client's channel id, capture-IVC driver uses it refer
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* the client for its capture responses.
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* @param[in] priv_context: client's private context, opaque to
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* capture-IVC driver.
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*/
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int tegra_capture_ivc_register_capture_cb(
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tegra_capture_ivc_cb_func capture_status_ind_cb,
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uint32_t chan_id, const void *priv_context);
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/*
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* Un-register callback function to stop receiving messages over control ivc
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* channel.
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*
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* @param[in] id: client's channel id or transaction id, for which the callback
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* needs to be unregistered.
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*/
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int tegra_capture_ivc_unregister_control_cb(uint32_t id);
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/*
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* Un-register callback function to stop receiving messages over capture ivc
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* channel.
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*
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* @param[in] chan_id: client's channel id, for which the callback needs to be
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* unregistered.
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*/
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int tegra_capture_ivc_unregister_capture_cb(uint32_t chan_id);
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/*
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* Read number of pending capture control ivc messages
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*
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*/
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int tegra_capture_ivc_capture_control_can_read(void);
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/*
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* Read number of pending capture status ivc messages
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*
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*/
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int tegra_capture_ivc_capture_status_can_read(void);
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#endif /* INCLUDE_CAPTURE_IVC_H */
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