/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */

#ifndef _VNIC_CQ_H_
#define _VNIC_CQ_H_

#include "cq_desc.h"
#include "vnic_dev.h"

/* Completion queue control */
struct vnic_cq_ctrl {
        u64 ring_base;                  /* 0x00 */
        u32 ring_size;                  /* 0x08 */
        u32 pad0;
        u32 flow_control_enable;        /* 0x10 */
        u32 pad1;
        u32 color_enable;               /* 0x18 */
        u32 pad2;
        u32 cq_head;                    /* 0x20 */
        u32 pad3;
        u32 cq_tail;                    /* 0x28 */
        u32 pad4;
        u32 cq_tail_color;              /* 0x30 */
        u32 pad5;
        u32 interrupt_enable;           /* 0x38 */
        u32 pad6;
        u32 cq_entry_enable;            /* 0x40 */
        u32 pad7;
        u32 cq_message_enable;          /* 0x48 */
        u32 pad8;
        u32 interrupt_offset;           /* 0x50 */
        u32 pad9;
        u64 cq_message_addr;            /* 0x58 */
        u32 pad10;
};

struct vnic_rx_bytes_counter {
        unsigned int small_pkt_bytes_cnt;
        unsigned int large_pkt_bytes_cnt;
};

struct vnic_cq {
        unsigned int index;
        struct vnic_dev *vdev;
        struct vnic_cq_ctrl __iomem *ctrl;              /* memory-mapped */
        struct vnic_dev_ring ring;
        unsigned int to_clean;
        unsigned int last_color;
        unsigned int interrupt_offset;
        struct vnic_rx_bytes_counter pkt_size_counter;
        unsigned int cur_rx_coal_timeval;
        unsigned int tobe_rx_coal_timeval;
        ktime_t prev_ts;
};

static inline void *vnic_cq_to_clean(struct vnic_cq *cq)
{
        return ((u8 *)cq->ring.descs + cq->ring.desc_size * cq->to_clean);
}

static inline void vnic_cq_inc_to_clean(struct vnic_cq *cq)
{
        cq->to_clean++;
        if (cq->to_clean == cq->ring.desc_count) {
                cq->to_clean = 0;
                cq->last_color = cq->last_color ? 0 : 1;
        }
}

void vnic_cq_free(struct vnic_cq *cq);
int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
        unsigned int desc_count, unsigned int desc_size);
int vnic_cq_alloc_with_type(struct vnic_dev *vdev, struct vnic_cq *cq,
                            unsigned int index, unsigned int desc_count,
                            unsigned int desc_size, unsigned int res_type);
void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
        unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
        unsigned int cq_tail_color, unsigned int interrupt_enable,
        unsigned int cq_entry_enable, unsigned int message_enable,
        unsigned int interrupt_offset, u64 message_addr);
void vnic_cq_clean(struct vnic_cq *cq);

#endif /* _VNIC_CQ_H_ */