drivers/net/ethernet/cisco/enic/vnic_intr.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/errno.h>
   9 #include <linux/types.h>
  10 #include <linux/pci.h>
  11 #include <linux/delay.h>
  12
  13 #include "vnic_dev.h"
  14 #include "vnic_intr.h"
  15 #include "enic.h"
  16
  17 void vnic_intr_free(struct vnic_intr *intr)
  18 {
  19         intr->ctrl = NULL;
  20 }
  21
  22 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
  23         unsigned int index)
  24 {
  25         intr->index = index;
  26         intr->vdev = vdev;
  27
  28         intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
  29         if (!intr->ctrl) {
  30                 vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n",
  31                          index);
  32                 return -EINVAL;
  33         }
  34
  35         return 0;
  36 }
  37
  38 void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
  39         unsigned int coalescing_type, unsigned int mask_on_assertion)
  40 {
  41         vnic_intr_coalescing_timer_set(intr, coalescing_timer);
  42         iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
  43         iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
  44         iowrite32(0, &intr->ctrl->int_credits);
  45 }
  46
  47 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
  48         u32 coalescing_timer)
  49 {
  50         iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
  51                 coalescing_timer), &intr->ctrl->coalescing_timer);
  52 }
  53
  54 void vnic_intr_clean(struct vnic_intr *intr)
  55 {
  56         iowrite32(0, &intr->ctrl->int_credits);
  57 }