cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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enic_api.c (1603B)

      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);