1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/types.h>
22 #include <linux/pci.h>
23 #include <linux/delay.h>
24 #include "vnic_dev.h"
25 #include "vnic_intr.h"
26
vnic_intr_free(struct vnic_intr * intr)27 void vnic_intr_free(struct vnic_intr *intr)
28 {
29 intr->ctrl = NULL;
30 }
31
vnic_intr_alloc(struct vnic_dev * vdev,struct vnic_intr * intr,unsigned int index)32 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
33 unsigned int index)
34 {
35 intr->index = index;
36 intr->vdev = vdev;
37
38 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
39 if (!intr->ctrl) {
40 printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
41 index);
42 return -EINVAL;
43 }
44
45 return 0;
46 }
47
vnic_intr_init(struct vnic_intr * intr,unsigned int coalescing_timer,unsigned int coalescing_type,unsigned int mask_on_assertion)48 void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
49 unsigned int coalescing_type, unsigned int mask_on_assertion)
50 {
51 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
52 iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
53 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
54 iowrite32(0, &intr->ctrl->int_credits);
55 }
56
vnic_intr_clean(struct vnic_intr * intr)57 void vnic_intr_clean(struct vnic_intr *intr)
58 {
59 iowrite32(0, &intr->ctrl->int_credits);
60 }
61