/*
* This file is part of the Chelsio T4 Ethernet driver for Linux.
*
* Copyright (c) 2015 Chelsio Communications, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifdef CONFIG_CHELSIO_T4_FCOE
#include <scsi/fc/fc_fs.h>
#include <scsi/libfcoe.h>
#include "cxgb4.h"
bool cxgb_fcoe_sof_eof_supported(struct adapter *adap, struct sk_buff *skb)
{
struct fcoe_hdr *fcoeh = (struct fcoe_hdr *)skb_network_header(skb);
u8 sof = fcoeh->fcoe_sof;
u8 eof = 0;
if ((sof != FC_SOF_I3) && (sof != FC_SOF_N3)) {
dev_err(adap->pdev_dev, "Unsupported SOF 0x%x\n", sof);
return false;
}
skb_copy_bits(skb, skb->len - 4, &eof, 1);
if ((eof != FC_EOF_N) && (eof != FC_EOF_T)) {
dev_err(adap->pdev_dev, "Unsupported EOF 0x%x\n", eof);
return false;
}
return true;
}
/**
* cxgb_fcoe_enable - enable FCoE offload features
* @netdev: net device
*
* Returns 0 on success or -EINVAL on failure.
*/
int cxgb_fcoe_enable(struct net_device *netdev)
{
struct port_info *pi = netdev_priv(netdev);
struct adapter *adap = pi->adapter;
struct cxgb_fcoe *fcoe = &pi->fcoe;
if (is_t4(adap->params.chip))
return -EINVAL;
if (!(adap->flags & CXGB4_FULL_INIT_DONE))
return -EINVAL;
dev_info(adap->pdev_dev, "Enabling FCoE offload features\n");
netdev->features |= NETIF_F_FCOE_CRC;
netdev->vlan_features |= NETIF_F_FCOE_CRC;
netdev->fcoe_mtu = true;
netdev_features_change(netdev);
fcoe->flags |= CXGB_FCOE_ENABLED;
return 0;
}
/**
* cxgb_fcoe_disable - disable FCoE offload
* @netdev: net device
*
* Returns 0 on success or -EINVAL on failure.
*/
int cxgb_fcoe_disable(struct net_device *netdev)
{
struct port_info *pi = netdev_priv(netdev);
struct adapter *adap = pi->adapter;
struct cxgb_fcoe *fcoe = &pi->fcoe;
if (!(fcoe->flags & CXGB_FCOE_ENABLED))
return -EINVAL;
dev_info(adap->pdev_dev, "Disabling FCoE offload features\n");
fcoe->flags &= ~CXGB_FCOE_ENABLED;
netdev->features &= ~NETIF_F_FCOE_CRC;
netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
netdev->fcoe_mtu = false;
netdev_features_change(netdev);
return 0;
}
#endif /* CONFIG_CHELSIO_T4_FCOE */
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