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git://nv-tegra.nvidia.com/linux-nv-oot.git
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b20c5f57e3
Use SPDX license GPL-V2.0 format and change Nvidia copyright year to include 2023. Bug 4078035 Change-Id: Icc0060431eb8d9c470a44f4cee50913cc1d8048a Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2890656 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Arun Swain <arswain@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2019-2023, NVIDIA CORPORATION. All rights reserved.
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*/
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#ifndef TEGRA_DCE_CLIENT_IPC_H
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#define TEGRA_DCE_CLIENT_IPC_H
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#define DCE_CLIENT_IPC_TYPE_CPU_RM 0U
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#define DCE_CLIENT_IPC_TYPE_HDCP_KMD 1U
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#define DCE_CLIENT_IPC_TYPE_RM_EVENT 2U
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#define DCE_CLIENT_IPC_TYPE_MAX 3U
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#define DCE_CLIENT_MAX_IPC_MSG_SIZE 4096
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/**
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* struct dce_ipc_message - Contains necessary info for an ipc msg.
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*
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* @tx : transmit message info
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* @rx : receive message info
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*/
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struct dce_ipc_message {
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struct {
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void *data;
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size_t size;
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} tx;
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struct {
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void *data;
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size_t size;
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} rx;
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};
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/*
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* tegra_dce_client_ipc_callback_t - callback function to notify the
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* client when the CPU Driver receives an IPC from DCE for the client.
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*
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* @client_id: id that represents the corresponding client.
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* @interface_type: Interface on which the IPC was received.
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* @msg_length: Length of the message.
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* @msg_data: Message data.
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* @usr_ctx: Any user context if present.
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*/
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typedef void (*tegra_dce_client_ipc_callback_t)(u32 handle,
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u32 interface_type, u32 msg_length,
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void *msg_data, void *usr_ctx);
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/*
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* tegra_dce_register_ipc_client() - used by clients to register with dce driver
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* @interface_type: Interface for which this client is expected to send rpcs and
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* receive callbacks.
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* @callback_fn: callback function to be called by DCE driver on receiving IPCs
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* from DCE on this interface.
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* @usr_ctx: Any user context if present.
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*
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* Return: valid client_id if no errors else corresponding error value.
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*/
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int tegra_dce_register_ipc_client(u32 interface_type,
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tegra_dce_client_ipc_callback_t callback_fn,
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void *usr_ctx, u32 *handlep);
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/*
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* tegra_dce_unregister_client() - used by clients to unregister to dce driver
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* @client_id : ointer to client's data
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*
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* Return: 0 if no errors else corresponding error value.
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*/
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int tegra_dce_unregister_ipc_client(u32 handle);
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/*
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* tegra_dce_client_ipc_send_recv() - used by clients to send rpcs to dce
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* @client_id : client_id registered with dce driver
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* @msg : message to be sent and received
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*
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* Return: 0 if no errors else corresponding error value.
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*/
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int tegra_dce_client_ipc_send_recv(u32 handle, struct dce_ipc_message *msg);
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#endif
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