1 /*
2  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
3  *
4  * This program is free software; you may redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 2 of the License.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15  * SOFTWARE.
16  */
17 
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/types.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include "vnic_dev.h"
24 #include "vnic_intr.h"
25 
svnic_intr_free(struct vnic_intr * intr)26 void svnic_intr_free(struct vnic_intr *intr)
27 {
28 	intr->ctrl = NULL;
29 }
30 
svnic_intr_alloc(struct vnic_dev * vdev,struct vnic_intr * intr,unsigned int index)31 int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
32 	unsigned int index)
33 {
34 	intr->index = index;
35 	intr->vdev = vdev;
36 
37 	intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
38 	if (!intr->ctrl) {
39 		pr_err("Failed to hook INTR[%d].ctrl resource\n",
40 			index);
41 		return -EINVAL;
42 	}
43 
44 	return 0;
45 }
46 
svnic_intr_init(struct vnic_intr * intr,unsigned int coalescing_timer,unsigned int coalescing_type,unsigned int mask_on_assertion)47 void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
48 	unsigned int coalescing_type, unsigned int mask_on_assertion)
49 {
50 	iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
51 	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
52 	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
53 	iowrite32(0, &intr->ctrl->int_credits);
54 }
55 
svnic_intr_clean(struct vnic_intr * intr)56 void svnic_intr_clean(struct vnic_intr *intr)
57 {
58 	iowrite32(0, &intr->ctrl->int_credits);
59 }
60