1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is part of the Chelsio T4 Ethernet driver for Linux.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 2015 Chelsio Communications, Inc. All rights reserved.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * This software is available to you under a choice of one of two
7*4882a593Smuzhiyun * licenses. You may choose to be licensed under the terms of the GNU
8*4882a593Smuzhiyun * General Public License (GPL) Version 2, available from the file
9*4882a593Smuzhiyun * COPYING in the main directory of this source tree, or the
10*4882a593Smuzhiyun * OpenIB.org BSD license below:
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or
13*4882a593Smuzhiyun * without modification, are permitted provided that the following
14*4882a593Smuzhiyun * conditions are met:
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * - Redistributions of source code must retain the above
17*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
18*4882a593Smuzhiyun * disclaimer.
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above
21*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
22*4882a593Smuzhiyun * disclaimer in the documentation and/or other materials
23*4882a593Smuzhiyun * provided with the distribution.
24*4882a593Smuzhiyun *
25*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32*4882a593Smuzhiyun * SOFTWARE.
33*4882a593Smuzhiyun */
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #ifdef CONFIG_CHELSIO_T4_FCOE
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #include <scsi/fc/fc_fs.h>
38*4882a593Smuzhiyun #include <scsi/libfcoe.h>
39*4882a593Smuzhiyun #include "cxgb4.h"
40*4882a593Smuzhiyun
cxgb_fcoe_sof_eof_supported(struct adapter * adap,struct sk_buff * skb)41*4882a593Smuzhiyun bool cxgb_fcoe_sof_eof_supported(struct adapter *adap, struct sk_buff *skb)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun struct fcoe_hdr *fcoeh = (struct fcoe_hdr *)skb_network_header(skb);
44*4882a593Smuzhiyun u8 sof = fcoeh->fcoe_sof;
45*4882a593Smuzhiyun u8 eof = 0;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun if ((sof != FC_SOF_I3) && (sof != FC_SOF_N3)) {
48*4882a593Smuzhiyun dev_err(adap->pdev_dev, "Unsupported SOF 0x%x\n", sof);
49*4882a593Smuzhiyun return false;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun skb_copy_bits(skb, skb->len - 4, &eof, 1);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if ((eof != FC_EOF_N) && (eof != FC_EOF_T)) {
55*4882a593Smuzhiyun dev_err(adap->pdev_dev, "Unsupported EOF 0x%x\n", eof);
56*4882a593Smuzhiyun return false;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return true;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun /**
63*4882a593Smuzhiyun * cxgb_fcoe_enable - enable FCoE offload features
64*4882a593Smuzhiyun * @netdev: net device
65*4882a593Smuzhiyun *
66*4882a593Smuzhiyun * Returns 0 on success or -EINVAL on failure.
67*4882a593Smuzhiyun */
cxgb_fcoe_enable(struct net_device * netdev)68*4882a593Smuzhiyun int cxgb_fcoe_enable(struct net_device *netdev)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun struct port_info *pi = netdev_priv(netdev);
71*4882a593Smuzhiyun struct adapter *adap = pi->adapter;
72*4882a593Smuzhiyun struct cxgb_fcoe *fcoe = &pi->fcoe;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun if (is_t4(adap->params.chip))
75*4882a593Smuzhiyun return -EINVAL;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun if (!(adap->flags & CXGB4_FULL_INIT_DONE))
78*4882a593Smuzhiyun return -EINVAL;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun dev_info(adap->pdev_dev, "Enabling FCoE offload features\n");
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun netdev->features |= NETIF_F_FCOE_CRC;
83*4882a593Smuzhiyun netdev->vlan_features |= NETIF_F_FCOE_CRC;
84*4882a593Smuzhiyun netdev->features |= NETIF_F_FCOE_MTU;
85*4882a593Smuzhiyun netdev->vlan_features |= NETIF_F_FCOE_MTU;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun netdev_features_change(netdev);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun fcoe->flags |= CXGB_FCOE_ENABLED;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun return 0;
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun /**
95*4882a593Smuzhiyun * cxgb_fcoe_disable - disable FCoE offload
96*4882a593Smuzhiyun * @netdev: net device
97*4882a593Smuzhiyun *
98*4882a593Smuzhiyun * Returns 0 on success or -EINVAL on failure.
99*4882a593Smuzhiyun */
cxgb_fcoe_disable(struct net_device * netdev)100*4882a593Smuzhiyun int cxgb_fcoe_disable(struct net_device *netdev)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun struct port_info *pi = netdev_priv(netdev);
103*4882a593Smuzhiyun struct adapter *adap = pi->adapter;
104*4882a593Smuzhiyun struct cxgb_fcoe *fcoe = &pi->fcoe;
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun if (!(fcoe->flags & CXGB_FCOE_ENABLED))
107*4882a593Smuzhiyun return -EINVAL;
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun dev_info(adap->pdev_dev, "Disabling FCoE offload features\n");
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun fcoe->flags &= ~CXGB_FCOE_ENABLED;
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun netdev->features &= ~NETIF_F_FCOE_CRC;
114*4882a593Smuzhiyun netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
115*4882a593Smuzhiyun netdev->features &= ~NETIF_F_FCOE_MTU;
116*4882a593Smuzhiyun netdev->vlan_features &= ~NETIF_F_FCOE_MTU;
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun netdev_features_change(netdev);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun return 0;
121*4882a593Smuzhiyun }
122*4882a593Smuzhiyun #endif /* CONFIG_CHELSIO_T4_FCOE */
123