mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
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7bca2b2466
incorrect use of NVIDIA Properitary License in Linux driver code Bug 5197152 Change-Id: Id23b8cbd4fd6315664c77d7f42014206d1ef8d5c Signed-off-by: Jerry Chang <jerchang@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3330623 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SPDX-FileCopyrightText: Copyright (c) 2017-2025 NVIDIA CORPORATION & AFFILIATES.
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* All rights reserved.
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*/
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#ifndef __CAPTURE_IVC_PRIV_H__
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#define __CAPTURE_IVC_PRIV_H__
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/** Total number of capture channels (2 * VI + ISP). T234 has two VI units */
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#define NUM_CAPTURE_CHANNELS 88
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/** Temporary ids for the clients whose channel-id is not yet allocated */
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#define NUM_CAPTURE_TRANSACTION_IDS NUM_CAPTURE_CHANNELS
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/** Total number of channels including Temporary IDs */
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#define TOTAL_CHANNELS (NUM_CAPTURE_CHANNELS + NUM_CAPTURE_TRANSACTION_IDS)
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#define TRANS_ID_START_IDX NUM_CAPTURE_CHANNELS
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/**
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* @brief Callback context of an IVC channel.
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*/
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struct tegra_capture_ivc_cb_ctx {
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/** Linked list of callback contexts */
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struct list_head node;
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/** Callback function registered by client */
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tegra_capture_ivc_cb_func cb_func;
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/** Private context of a VI/ISP capture context */
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const void *priv_context;
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struct semaphore sem_ch;
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};
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/**
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* @brief IVC channel context.
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*/
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struct tegra_capture_ivc {
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/** Pointer to IVC channel */
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struct tegra_ivc_channel *chan;
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/** Callback context lock */
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struct mutex cb_ctx_lock;
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/** Channel write lock */
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struct mutex ivc_wr_lock;
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/** Deferred work */
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struct kthread_work work;
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/** ivc worker thread **/
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struct kthread_worker ivc_worker;
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/** task struct **/
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struct task_struct *ivc_kthread;
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/** Channel work queue head */
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wait_queue_head_t write_q;
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/** Array holding callbacks registered by each channel */
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struct tegra_capture_ivc_cb_ctx cb_ctx[TOTAL_CHANNELS];
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/** spinlock protecting access to linked list */
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spinlock_t avl_ctx_list_lock;
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/** Linked list holding callback contexts */
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struct list_head avl_ctx_list;
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};
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/**
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* @brief Standard message header for all capture IVC messages.
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*/
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struct tegra_capture_ivc_msg_header {
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/** Message identifier. */
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uint32_t msg_id;
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union {
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/** Channel identifier. */
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uint32_t channel_id;
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/** Transaction id */
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uint32_t transaction;
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};
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} __aligned(8);
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/**
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* @brief Response of IVC msg
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*/
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struct tegra_capture_ivc_resp {
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/** IVC msg header. See @ref tegra_capture_ivc_msg_header */
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struct tegra_capture_ivc_msg_header header;
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};
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/** Pointer holding the Control IVC channel context, created during probe call*/
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static struct tegra_capture_ivc *__scivc_control;
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/** Pointer holding the Capture IVC channel context, created during probe call*/
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static struct tegra_capture_ivc *__scivc_capture;
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/**
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* @brief Worker thread to handle the asynchronous msgs on the IVC channel.
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This will further calls callbacks registered by Channel drivers.
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*
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* @param[in] work kthread_work pointer
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*/
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static void tegra_capture_ivc_worker(
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struct kthread_work *work);
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/**
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* @brief Implementation of IVC notify operation which gets called when we any
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* new message on the bus for the channel. This signals the worker thread.
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*
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* @param[in] chan tegra_ivc_channel channel pointer
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*/
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static void tegra_capture_ivc_notify(
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struct tegra_ivc_channel *chan);
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/**
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* @brief Implementation of probe operation which gets called during boot
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*
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* @param[in,out] chan tegra_ivc_channel channel pointer
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*
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* @returns 0 (success), neg. errno (failure)
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*/
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static int tegra_capture_ivc_probe(
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struct tegra_ivc_channel *chan);
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/**
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* @brief Implementation of remove operation
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*
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* @param[in] chan tegra_ivc_channel channel pointer
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*/
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static void tegra_capture_ivc_remove(
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struct tegra_ivc_channel *chan);
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/**
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* @brief Function to transmit the IVC msg after checking if it can write,
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* using Tegra IVC core library APIs.
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*
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* @param[in] civc IVC channel on which the msg needs to be transmitted.
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* @param[in] req IVC msg blob.
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* @param[in] len IVC msg length.
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*
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* @returns 0 (success), neg. errno (failure)
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*/
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static int tegra_capture_ivc_tx(
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struct tegra_capture_ivc *civc,
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const void *req,
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size_t len);
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#endif /* __CAPTURE_IVC_PRIV_H__ */
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