LXR linux/drivers/net/ethernet/cisco/enic/vnic

   1/*
   2 * Copyright 2008-2010 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
  20#include <linux/kernel.h>
  21#include <linux/errno.h>
  22#include <linux/types.h>
  23#include <linux/pci.h>
  24#include <linux/delay.h>
  25
  26#include "vnic_dev.h"
  27#include "vnic_intr.h"
  28#include "enic.h"
  29
  30void vnic_intr_free(struct vnic_intr *intr)
  31{
  32        intr->ctrl = NULL;
  33}
  34
  35int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
  36        unsigned int index)
  37{
  38        intr->index = index;
  39        intr->vdev = vdev;
  40
  41        intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
  42        if (!intr->ctrl) {
  43                vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n",
  44                         index);
  45                return -EINVAL;
  46        }
  47
  48        return 0;
  49}
  50
  51void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
  52        unsigned int coalescing_type, unsigned int mask_on_assertion)
  53{
  54        vnic_intr_coalescing_timer_set(intr, coalescing_timer);
  55        iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
  56        iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
  57        iowrite32(0, &intr->ctrl->int_credits);
  58}
  59
  60void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
  61        u32 coalescing_timer)
  62{
  63        iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
  64                coalescing_timer), &intr->ctrl->coalescing_timer);
  65}
  66
  67void vnic_intr_clean(struct vnic_intr *intr)
  68{
  69        iowrite32(0, &intr->ctrl->int_credits);
  70}
  71