/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2015, Intel Corporation.
 */

#ifndef __IA_CSS_BUFFER_H
#define __IA_CSS_BUFFER_H

/* @file
 * This file contains datastructures and types for buffers used in CSS
 */

#include <type_support.h>
#include "ia_css_types.h"
#include "ia_css_timer.h"

/* Enumeration of buffer types. Buffers can be queued and de-queued
 *  to hand them over between IA and ISP.
 */
enum ia_css_buffer_type {
        IA_CSS_BUFFER_TYPE_INVALID = -1,
        IA_CSS_BUFFER_TYPE_3A_STATISTICS = 0,
        IA_CSS_BUFFER_TYPE_DIS_STATISTICS,
        IA_CSS_BUFFER_TYPE_LACE_STATISTICS,
        IA_CSS_BUFFER_TYPE_INPUT_FRAME,
        IA_CSS_BUFFER_TYPE_OUTPUT_FRAME,
        IA_CSS_BUFFER_TYPE_SEC_OUTPUT_FRAME,
        IA_CSS_BUFFER_TYPE_VF_OUTPUT_FRAME,
        IA_CSS_BUFFER_TYPE_SEC_VF_OUTPUT_FRAME,
        IA_CSS_BUFFER_TYPE_RAW_OUTPUT_FRAME,
        IA_CSS_BUFFER_TYPE_CUSTOM_INPUT,
        IA_CSS_BUFFER_TYPE_CUSTOM_OUTPUT,
        IA_CSS_BUFFER_TYPE_METADATA,
        IA_CSS_BUFFER_TYPE_PARAMETER_SET,
        IA_CSS_BUFFER_TYPE_PER_FRAME_PARAMETER_SET,
        IA_CSS_NUM_DYNAMIC_BUFFER_TYPE,
        IA_CSS_NUM_BUFFER_TYPE
};

/* Driver API is not SP/ISP visible, 64 bit types not supported on hivecc */

/* Buffer structure. This is a container structure that enables content
 *  independent buffer queues and access functions.
 */
struct ia_css_buffer {
        enum ia_css_buffer_type type; /** Buffer type. */
        unsigned int exp_id;
        /** exposure id for this buffer; 0 = not available
             see ia_css_event_public.h for more detail. */
        union {
                struct ia_css_isp_3a_statistics
                        *stats_3a;    /** 3A statistics & optionally RGBY statistics. */
                struct ia_css_isp_dvs_statistics *stats_dvs;   /** DVS statistics. */
                struct ia_css_isp_skc_dvs_statistics *stats_skc_dvs;  /** SKC DVS statistics. */
                struct ia_css_frame              *frame;       /** Frame buffer. */
                struct ia_css_acc_param          *custom_data; /** Custom buffer. */
                struct ia_css_metadata           *metadata;    /** Sensor metadata. */
        } data; /** Buffer data pointer. */
        u64 driver_cookie; /** cookie for the driver */
        struct ia_css_time_meas
                timing_data; /** timing data (readings from the timer) */
        struct ia_css_clock_tick
                isys_eof_clock_tick; /** ISYS's end of frame timer tick*/
};

/* @brief Dequeue param buffers from sp2host_queue
 *
 * @return                                       None
 *
 * This function must be called at every driver interrupt handler to prevent
 * overflow of sp2host_queue.
 */
void
ia_css_dequeue_param_buffers(void);

#endif /* __IA_CSS_BUFFER_H */