LXR linux/drivers/scsi/fnic/vnic

   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}
  61