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 
29 int 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 }
54 EXPORT_SYMBOL(enic_api_devcmd_proxy_by_index);
55