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path: root/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
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Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
new file mode 100644
index 000000000000..6c8a62eefe51
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
@@ -0,0 +1,122 @@
+/*
+ * 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 & 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->features |= NETIF_F_FCOE_MTU;
+ netdev->vlan_features |= NETIF_F_FCOE_MTU;
+
+ 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->features &= ~NETIF_F_FCOE_MTU;
+ netdev->vlan_features &= ~NETIF_F_FCOE_MTU;
+
+ netdev_features_change(netdev);
+
+ return 0;
+}
+#endif /* CONFIG_CHELSIO_T4_FCOE */