xref: /linux/drivers/net/ethernet/cisco/enic/enic_api.c (revision 9f2c9170934eace462499ba0bfe042cc72900173)
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);
40