/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2010 - 2015, Intel Corporation.
 */

#ifndef __QUEUE_ACCESS_H
#define __QUEUE_ACCESS_H

#include <linux/errno.h>

#include <type_support.h>
#include <ia_css_queue_comm.h>
#include <ia_css_circbuf.h>

#define QUEUE_IGNORE_START_FLAG 0x0001
#define QUEUE_IGNORE_END_FLAG   0x0002
#define QUEUE_IGNORE_SIZE_FLAG  0x0004
#define QUEUE_IGNORE_STEP_FLAG  0x0008
#define QUEUE_IGNORE_DESC_FLAGS_MAX 0x000f

#define QUEUE_IGNORE_SIZE_START_STEP_FLAGS \
        (QUEUE_IGNORE_SIZE_FLAG | \
        QUEUE_IGNORE_START_FLAG | \
        QUEUE_IGNORE_STEP_FLAG)

#define QUEUE_IGNORE_SIZE_END_STEP_FLAGS \
        (QUEUE_IGNORE_SIZE_FLAG | \
        QUEUE_IGNORE_END_FLAG   | \
        QUEUE_IGNORE_STEP_FLAG)

#define QUEUE_IGNORE_START_END_STEP_FLAGS \
        (QUEUE_IGNORE_START_FLAG | \
        QUEUE_IGNORE_END_FLAG     | \
        QUEUE_IGNORE_STEP_FLAG)

#define QUEUE_CB_DESC_INIT(cb_desc)     \
        do {                            \
                (cb_desc)->size  = 0;   \
                (cb_desc)->step  = 0;   \
                (cb_desc)->start = 0;   \
                (cb_desc)->end   = 0;   \
        } while (0)

struct ia_css_queue {
        u8 type;        /* Specify remote/local type of access */
        u8 location;    /* Cell location for queue */
        u8 proc_id;     /* Processor id for queue access */
        union {
                ia_css_circbuf_t cb_local;
                struct {
                        u32 cb_desc_addr; /*Circbuf desc address for remote queues*/
                        u32 cb_elems_addr; /*Circbuf elements addr for remote queue*/
                }       remote;
        } desc;
};

int ia_css_queue_load(
    struct ia_css_queue *rdesc,
    ia_css_circbuf_desc_t *cb_desc,
    uint32_t ignore_desc_flags);

int ia_css_queue_store(
    struct ia_css_queue *rdesc,
    ia_css_circbuf_desc_t *cb_desc,
    uint32_t ignore_desc_flags);

int ia_css_queue_item_load(
    struct ia_css_queue *rdesc,
    u8 position,
    ia_css_circbuf_elem_t *item);

int ia_css_queue_item_store(
    struct ia_css_queue *rdesc,
    u8 position,
    ia_css_circbuf_elem_t *item);

#endif /* __QUEUE_ACCESS_H */