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

   1/*
   2 * Copyright 2013 Cisco Systems, Inc.  All rights reserved.
   3 *
   4 * This program is free software; you may redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; version 2 of the License.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15 * SOFTWARE.
  16 *
  17 */
  18
  19#include <linux/netdevice.h>
  20#include <linux/spinlock.h>
  21
  22#include "vnic_dev.h"
  23#include "vnic_devcmd.h"
  24
  25#include "enic_res.h"
  26#include "enic.h"
  27#include "enic_api.h"
  28
  29int enic_api_devcmd_proxy_by_index(struct net_device *netdev, int vf,
  30        enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
  31{
  32        int err;
  33        struct enic *enic = netdev_priv(netdev);
  34        struct vnic_dev *vdev = enic->vdev;
  35
  36        spin_lock(&enic->enic_api_lock);
  37        while (enic->enic_api_busy) {
  38                spin_unlock(&enic->enic_api_lock);
  39                cpu_relax();
  40                spin_lock(&enic->enic_api_lock);
  41        }
  42
  43        spin_lock_bh(&enic->devcmd_lock);
  44
  45        vnic_dev_cmd_proxy_by_index_start(vdev, vf);
  46        err = vnic_dev_cmd(vdev, cmd, a0, a1, wait);
  47        vnic_dev_cmd_proxy_end(vdev);
  48
  49        spin_unlock_bh(&enic->devcmd_lock);
  50        spin_unlock(&enic->enic_api_lock);
  51
  52        return err;
  53}
  54EXPORT_SYMBOL(enic_api_devcmd_proxy_by_index);
  55