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