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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright 2013 Cisco Systems, Inc.  All rights reserved.
   3
   4 #include <linux/netdevice.h>
   5 #include <linux/spinlock.h>
   6
   7 #include "vnic_dev.h"
   8 #include "vnic_devcmd.h"
   9
  10 #include "enic_res.h"
  11 #include "enic.h"
  12 #include "enic_api.h"
  13
  14 int enic_api_devcmd_proxy_by_index(struct net_device *netdev, int vf,
  15         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
  16 {
  17         int err;
  18         struct enic *enic = netdev_priv(netdev);
  19         struct vnic_dev *vdev = enic->vdev;
  20
  21         spin_lock(&enic->enic_api_lock);
  22         while (enic->enic_api_busy) {
  23                 spin_unlock(&enic->enic_api_lock);
  24                 cpu_relax();
  25                 spin_lock(&enic->enic_api_lock);
  26         }
  27
  28         spin_lock_bh(&enic->devcmd_lock);
  29
  30         vnic_dev_cmd_proxy_by_index_start(vdev, vf);
  31         err = vnic_dev_cmd(vdev, cmd, a0, a1, wait);
  32         vnic_dev_cmd_proxy_end(vdev);
  33
  34         spin_unlock_bh(&enic->devcmd_lock);
  35         spin_unlock(&enic->enic_api_lock);
  36
  37         return err;
  38 }
  39 EXPORT_SYMBOL(enic_api_devcmd_proxy_by_index);