drivers/net/ethernet/cisco/enic/vnic_cq.h

/* 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);
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_ */