1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
5 */
6
7#include <linux/kernel.h>
8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/pci.h>
11#include <linux/delay.h>
12
13#include "vnic_dev.h"
14#include "vnic_intr.h"
15#include "enic.h"
16
17void vnic_intr_free(struct vnic_intr *intr)
18{
19	intr->ctrl = NULL;
20}
21
22int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
23	unsigned int index)
24{
25	intr->index = index;
26	intr->vdev = vdev;
27
28	intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
29	if (!intr->ctrl) {
30		vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n",
31			 index);
32		return -EINVAL;
33	}
34
35	return 0;
36}
37
38void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
39	unsigned int coalescing_type, unsigned int mask_on_assertion)
40{
41	vnic_intr_coalescing_timer_set(intr, coalescing_timer);
42	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
43	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
44	iowrite32(0, &intr->ctrl->int_credits);
45}
46
47void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
48	u32 coalescing_timer)
49{
50	iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
51		coalescing_timer), &intr->ctrl->coalescing_timer);
52}
53
54void vnic_intr_clean(struct vnic_intr *intr)
55{
56	iowrite32(0, &intr->ctrl->int_credits);
57}
58