1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2014 Cisco Systems, Inc. All rights reserved.
3
4 #include <linux/kernel.h>
5 #include <linux/errno.h>
6 #include <linux/types.h>
7 #include <linux/pci.h>
8 #include <linux/delay.h>
9 #include "vnic_dev.h"
10 #include "vnic_intr.h"
11
svnic_intr_free(struct vnic_intr * intr)12 void svnic_intr_free(struct vnic_intr *intr)
13 {
14 intr->ctrl = NULL;
15 }
16
svnic_intr_alloc(struct vnic_dev * vdev,struct vnic_intr * intr,unsigned int index)17 int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
18 unsigned int index)
19 {
20 intr->index = index;
21 intr->vdev = vdev;
22
23 intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
24 if (!intr->ctrl) {
25 pr_err("Failed to hook INTR[%d].ctrl resource\n",
26 index);
27 return -EINVAL;
28 }
29
30 return 0;
31 }
32
svnic_intr_init(struct vnic_intr * intr,unsigned int coalescing_timer,unsigned int coalescing_type,unsigned int mask_on_assertion)33 void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
34 unsigned int coalescing_type, unsigned int mask_on_assertion)
35 {
36 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
37 iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
38 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
39 iowrite32(0, &intr->ctrl->int_credits);
40 }
41
svnic_intr_clean(struct vnic_intr * intr)42 void svnic_intr_clean(struct vnic_intr *intr)
43 {
44 iowrite32(0, &intr->ctrl->int_credits);
45 }
46