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/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * Copyright (c) 2014, Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */
#ident "$Id: vnic_intr.c 171146 2014-05-02 07:08:20Z ssujith $"

#include "vnic_dev.h"
#include "vnic_intr.h"

void vnic_intr_free(struct vnic_intr *intr)
{
	intr->ctrl = NULL;
}

int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
	unsigned int index)
{
	intr->index = index;
	intr->vdev = vdev;

	intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
	if (!intr->ctrl) {
		pr_err("Failed to hook INTR[%d].ctrl resource\n", index);
		return -EINVAL;
	}

	return 0;
}

void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
	unsigned int coalescing_type, unsigned int mask_on_assertion)
{
	vnic_intr_coalescing_timer_set(intr, coalescing_timer);
	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
	iowrite32(0, &intr->ctrl->int_credits);
}

void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
	u32 coalescing_timer)
{
	iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
		coalescing_timer), &intr->ctrl->coalescing_timer);
}

void vnic_intr_clean(struct vnic_intr *intr)
{
	iowrite32(0, &intr->ctrl->int_credits);
}