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4e8ed5f7b7
Linux v6.2 update the Tegra IVC driver to use iosys-map and this broke support for the IVC EXT driver. Update the IVC EXT driver to support iosys-map if the kernel supports this version of the Tegra IVC driver. Bug 4221847 Change-Id: I1f1ddb1cc4312cb2359373b53287c110831b473c Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2996208 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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*/
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#ifndef __TEGRA_IVC_EXT_H
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#define __TEGRA_IVC_EXT_H
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#include <nvidia/conftest.h>
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#include <linux/types.h>
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#include <soc/tegra/ivc-priv.h>
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/**
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* tegra_ivc_channel_notified - notifies the peer device
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* @ivc pointer of the IVC channel
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*
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* notifies the peer device
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*
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* Returns 0 if success else -EAGAIN in case of failure.
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*/
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int tegra_ivc_channel_notified(struct tegra_ivc *ivc);
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/**
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* tegra_ivc_channel_reset - Resets the channel state
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* @ivc pointer of the IVC channel
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*
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* Resets the channel state
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*/
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void tegra_ivc_channel_reset(struct tegra_ivc *ivc);
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#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP)
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/**
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* tegra_ivc_empty - Checks whether channel is empty or not
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* @map pointer to iosys-map buffer for the IVC channel
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*
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* Checks whether channel is empty or not to read or write
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*
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* Returns true if channel is empty to read or write.
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*/
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bool tegra_ivc_empty(struct tegra_ivc *ivc, struct iosys_map *map);
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#else
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/**
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* tegra_ivc_empty - Checks whether channel is empty or not
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* @ivc pointer of the IVC channel
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*
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* Checks whether channel is empty or not to read or write
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*
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* Returns true if channel is empty to read or write.
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*/
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bool tegra_ivc_empty(struct tegra_ivc *ivc, struct tegra_ivc_header *header);
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#endif
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/**
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* tegra_ivc_channel_sync - Syncs the IVC channel accross reboots.
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* @ivc pointer of the IVC channel
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*
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* Syncs the IVC channel accross reboots.
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*
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* Returns 0 on success.
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*/
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int tegra_ivc_channel_sync(struct tegra_ivc *ivc);
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#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP)
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/**
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* tegra_ivc_frames_available - Checks number of available frames.
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* @map pointer to iosys-map buffer for the IVC channel
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*
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* Checks number of available frames.
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*
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* Returns integer value indicating number of available frames..
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*/
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uint32_t tegra_ivc_frames_available(struct tegra_ivc *ivc, struct iosys_map *map);
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#else
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/**
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* tegra_ivc_frames_available - Checks number of available frames.
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* @ivc pointer of the IVC channel
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*
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* Checks number of available frames.
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*
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* Returns integer value indicating number of available frames..
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*/
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uint32_t tegra_ivc_frames_available(struct tegra_ivc *ivc, struct tegra_ivc_header *header);
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#endif
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/**
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* tegra_ivc_can_read - Checks whether we can read from ivc channel
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* @ivc pointer of the IVC channel
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*
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* Checks whether we can read from ivc channel or not
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*
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* Returns 1 for success and 0 for failure.
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*/
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int tegra_ivc_can_read(struct tegra_ivc *ivc);
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/**
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* tegra_ivc_can_write - Checks whether we can write to ivc channel
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* @ivc pointer of the IVC channel
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*
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* Checks whether we can write to ivc channel or not
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*
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* Returns 1 for success and 0 for failure.
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*/
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int tegra_ivc_can_write(struct tegra_ivc *ivc);
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/**
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* tegra_ivc_read - Reads frame form ivc channel
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* @ivc pointer of the IVC channel
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* @usr_buf user buffer to be updated with data
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* @buf kernel buffer to be updated with data
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* @max_read max data ro be read form ivc channel
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*
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* Reads frame form ivc channel
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*
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* Returns no. of bytes read from ivc channel else return error.
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*/
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int tegra_ivc_read(struct tegra_ivc *ivc, void __user *usr_buf, void *buf, size_t max_read);
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/**
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* tegra_ivc_read_peek - Reads frame form ivc channel
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* @ivc pointer of the IVC channel
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* @usr_buf user buffer to be updated with data
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* @buf kernel buffer to be updated with data
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* @offset kernel buffer to be updated with data from some offset
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* @size max data ro be read form ivc channel
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*
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* Reads frame form ivc channel from some offset
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*
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* Returns no. of bytes read from ivc channel else return error.
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*/
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int tegra_ivc_read_peek(struct tegra_ivc *ivc, void __user *usr_buf, void *buf, size_t offset, size_t size);
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/**
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* tegra_ivc_write - Writes frame to ivc channel
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* @ivc pointer of the IVC channel
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* @usr_buf user buffer to e written to ivc channel
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* @buf kernel buffer to be written to ivc channel
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* @size Data size to be written to ivc channel
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*
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* Writes frame to ivc channel
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*
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* Returns no. of bytes written to ivc channel else return error.
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*/
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int tegra_ivc_write(struct tegra_ivc *ivc, const void __user *usr_buf, const void *buf, size_t size);
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#endif /* __TEGRA_IVC_EXT_H */
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