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122 lines
3.5 KiB
122 lines
3.5 KiB
/* |
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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 & CXGB4_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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