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/drivers/scsi/fnic/vnic_intr.c

http://github.com/mirrors/linux
C | 60 lines | 36 code | 7 blank | 17 comment | 1 complexity | df4a5294ae41922e3f0d4af7c5c345a7 MD5 | raw file
 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
27void vnic_intr_free(struct vnic_intr *intr)
28{
29	intr->ctrl = NULL;
30}
31
32int 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
48void 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
57void vnic_intr_clean(struct vnic_intr *intr)
58{
59	iowrite32(0, &intr->ctrl->int_credits);
60}