drivers/net/enic/base/vnic_intr.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  */
   5
   6 #include "vnic_dev.h"
   7 #include "vnic_intr.h"
   8
   9 void vnic_intr_free(struct vnic_intr *intr)
  10 {
  11         intr->ctrl = NULL;
  12 }
  13
  14 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
  15         unsigned int index)
  16 {
  17         intr->index = index;
  18         intr->vdev = vdev;
  19
  20         intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
  21         if (!intr->ctrl) {
  22                 pr_err("Failed to hook INTR[%d].ctrl resource\n", index);
  23                 return -EINVAL;
  24         }
  25
  26         return 0;
  27 }
  28
  29 void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
  30         unsigned int coalescing_type, unsigned int mask_on_assertion)
  31 {
  32         vnic_intr_coalescing_timer_set(intr, coalescing_timer);
  33         iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
  34         iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
  35         iowrite32(0, &intr->ctrl->int_credits);
  36 }
  37
  38 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
  39         u32 coalescing_timer)
  40 {
  41         iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
  42                 coalescing_timer), &intr->ctrl->coalescing_timer);
  43 }
  44
  45 void vnic_intr_clean(struct vnic_intr *intr)
  46 {
  47         iowrite32(0, &intr->ctrl->int_credits);
  48 }