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/* Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _CAM_NODE_H_
#define _CAM_NODE_H_
#include <linux/kref.h>
#include "cam_context.h"
#include "cam_hw_mgr_intf.h"
#include "cam_req_mgr_interface.h"
#define CAM_NODE_STATE_UNINIT 0
#define CAM_NODE_STATE_INIT 1
/**
* struct cam_node - Singleton Node for camera HW devices
*
* @name: Name for struct cam_node
* @state: Node state:
* 0 = uninitialized, 1 = initialized
* @list_mutex: Mutex for the context pool
* @free_ctx_list: Free context pool list
* @ctx_list: Context list
* @ctx_size: Context list size
* @hw_mgr_intf: Interface for cam_node to HW
* @crm_node_intf: Interface for the CRM to cam_node
*
*/
struct cam_node {
char name[CAM_CTX_DEV_NAME_MAX_LENGTH];
uint32_t state;
/* context pool */
struct mutex list_mutex;
struct list_head free_ctx_list;
struct cam_context *ctx_list;
uint32_t ctx_size;
/* interfaces */
struct cam_hw_mgr_intf hw_mgr_intf;
struct cam_req_mgr_kmd_ops crm_node_intf;
};
/**
* cam_node_handle_ioctl()
*
* @brief: Handle ioctl commands
*
* @node: Node handle
* @cmd: IOCTL command
*
*/
int cam_node_handle_ioctl(struct cam_node *node, struct cam_control *cmd);
/**
* cam_node_deinit()
*
* @brief: Deinitialization function for the Node interface
*
* @node: Node handle
*
*/
int cam_node_deinit(struct cam_node *node);
/**
* cam_node_shutdown()
*
* @brief: Shutdowns/Closes the cam node.
*
* @node: Cam_node pointer
*
*/
int cam_node_shutdown(struct cam_node *node);
/**
* cam_node_init()
*
* @brief: Initialization function for the Node interface.
*
* @node: Cam_node pointer
* @hw_mgr_intf: HW manager interface blob
* @ctx_list: List of cam_contexts to be added
* @ctx_size: Size of the cam_context
* @name: Name for the node
*
*/
int cam_node_init(struct cam_node *node, struct cam_hw_mgr_intf *hw_mgr_intf,
struct cam_context *ctx_list, uint32_t ctx_size, char *name);
/**
* cam_node_put_ctxt_to_free_list()
*
* @brief: Put context in node free list.
*
* @ref: Context's kref object
*
*/
void cam_node_put_ctxt_to_free_list(struct kref *ref);
#endif /* _CAM_NODE_H_ */
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