ceph/src/dpdk/drivers/net/enic/base/vnic_intr.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include "vnic_dev.h"
  36 #include "vnic_intr.h"
  37
  38 void vnic_intr_free(struct vnic_intr *intr)
  39 {
  40         intr->ctrl = NULL;
  41 }
  42
  43 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
  44         unsigned int index)
  45 {
  46         intr->index = index;
  47         intr->vdev = vdev;
  48
  49         intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
  50         if (!intr->ctrl) {
  51                 pr_err("Failed to hook INTR[%d].ctrl resource\n", index);
  52                 return -EINVAL;
  53         }
  54
  55         return 0;
  56 }
  57
  58 void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
  59         unsigned int coalescing_type, unsigned int mask_on_assertion)
  60 {
  61         vnic_intr_coalescing_timer_set(intr, coalescing_timer);
  62         iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
  63         iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
  64         iowrite32(0, &intr->ctrl->int_credits);
  65 }
  66
  67 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
  68         u32 coalescing_timer)
  69 {
  70         iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
  71                 coalescing_timer), &intr->ctrl->coalescing_timer);
  72 }
  73
  74 void vnic_intr_clean(struct vnic_intr *intr)
  75 {
  76         iowrite32(0, &intr->ctrl->int_credits);
  77 }