linux/drivers/staging/media/atomisp/pci/runtime/rmgr/src/rmgr_vbuf.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2010-2015, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#include "hmm.h"
#include "ia_css_rmgr.h"

#include <type_support.h>
#include <assert_support.h>
#include <platform_support.h> /* memset */
#include <ia_css_debug.h>

/*
 * @brief VBUF resource handles
 */
#define NUM_HANDLES …
static struct ia_css_rmgr_vbuf_handle handle_table[NUM_HANDLES];

/*
 * @brief VBUF resource pool - refpool
 */
static struct ia_css_rmgr_vbuf_pool refpool;

/*
 * @brief VBUF resource pool - writepool
 */
static struct ia_css_rmgr_vbuf_pool writepool = …;

/*
 * @brief VBUF resource pool - hmmbufferpool
 */
static struct ia_css_rmgr_vbuf_pool hmmbufferpool = …;

struct ia_css_rmgr_vbuf_pool *vbuf_ref = …;
struct ia_css_rmgr_vbuf_pool *vbuf_write = …;
struct ia_css_rmgr_vbuf_pool *hmm_buffer_pool = …;

/*
 * @brief Initialize the reference count (host, vbuf)
 */
static void rmgr_refcount_init_vbuf(void)
{ … }

/*
 * @brief Retain the reference count for a handle (host, vbuf)
 *
 * @param handle	The pointer to the handle
 */
void ia_css_rmgr_refcount_retain_vbuf(struct ia_css_rmgr_vbuf_handle **handle)
{ … }

/*
 * @brief Release the reference count for a handle (host, vbuf)
 *
 * @param handle	The pointer to the handle
 */
void ia_css_rmgr_refcount_release_vbuf(struct ia_css_rmgr_vbuf_handle **handle)
{ … }

/*
 * @brief Initialize the resource pool (host, vbuf)
 *
 * @param pool	The pointer to the pool
 */
int ia_css_rmgr_init_vbuf(struct ia_css_rmgr_vbuf_pool *pool)
{ … }

/*
 * @brief Uninitialize the resource pool (host, vbuf)
 *
 * @param pool	The pointer to the pool
 */
void ia_css_rmgr_uninit_vbuf(struct ia_css_rmgr_vbuf_pool *pool)
{ … }

/*
 * @brief Push a handle to the pool
 *
 * @param pool		The pointer to the pool
 * @param handle	The pointer to the handle
 */
static
void rmgr_push_handle(struct ia_css_rmgr_vbuf_pool *pool,
		      struct ia_css_rmgr_vbuf_handle **handle)
{ … }

/*
 * @brief Pop a handle from the pool
 *
 * @param pool		The pointer to the pool
 * @param handle	The pointer to the handle
 */
static
void rmgr_pop_handle(struct ia_css_rmgr_vbuf_pool *pool,
		     struct ia_css_rmgr_vbuf_handle **handle)
{ … }

/*
 * @brief Acquire a handle from the pool (host, vbuf)
 *
 * @param pool		The pointer to the pool
 * @param handle	The pointer to the handle
 */
void ia_css_rmgr_acq_vbuf(struct ia_css_rmgr_vbuf_pool *pool,
			  struct ia_css_rmgr_vbuf_handle **handle)
{ … }

/*
 * @brief Release a handle to the pool (host, vbuf)
 *
 * @param pool		The pointer to the pool
 * @param handle	The pointer to the handle
 */
void ia_css_rmgr_rel_vbuf(struct ia_css_rmgr_vbuf_pool *pool,
			  struct ia_css_rmgr_vbuf_handle **handle)
{ … }