FCoE support in cxgb4 driver

index 4555634..bf46ca9 100644
@@ -387,6 +387,10 @@ struct sge_rspq;
 
 #include "cxgb4_dcb.h"
 
+#ifdef CONFIG_CHELSIO_T4_FCOE
+#include "cxgb4_fcoe.h"
+#endif /* CONFIG_CHELSIO_T4_FCOE */
+
 struct port_info {
 	struct adapter *adapter;
 	u16    viid;

@@ -406,6 +410,9 @@ struct port_info {
 #ifdef CONFIG_CHELSIO_T4_DCB
 	struct port_dcb_info dcb;     /* Data Center Bridging support */
 #endif
+#ifdef CONFIG_CHELSIO_T4_FCOE
+	struct cxgb_fcoe fcoe;
+#endif /* CONFIG_CHELSIO_T4_FCOE */
 };
 
 struct dentry;

57 lines not on this page · raw message

index 0fb975e..30a2f56 100644
@@ -794,6 +794,14 @@ struct cpl_rx_pkt {
 	__be16 err_vec;
 };
 
+#define RXF_PSH_S    20
+#define RXF_PSH_V(x) ((x) << RXF_PSH_S)
+#define RXF_PSH_F    RXF_PSH_V(1U)
+
+#define RXF_SYN_S    21
+#define RXF_SYN_V(x) ((x) << RXF_SYN_S)
+#define RXF_SYN_F    RXF_SYN_V(1U)
+
 #define RXF_UDP_S    22
 #define RXF_UDP_V(x) ((x) << RXF_UDP_S)
 #define RXF_UDP_F    RXF_UDP_V(1U)

@@ -810,6 +818,18 @@ struct cpl_rx_pkt {
 #define RXF_IP6_V(x) ((x) << RXF_IP6_S)
 #define RXF_IP6_F    RXF_IP6_V(1U)
 
+#define RXF_SYN_COOKIE_S    26
+#define RXF_SYN_COOKIE_V(x) ((x) << RXF_SYN_COOKIE_S)
+#define RXF_SYN_COOKIE_F    RXF_SYN_COOKIE_V(1U)
+
+#define RXF_FCOE_S    26
+#define RXF_FCOE_V(x) ((x) << RXF_FCOE_S)
+#define RXF_FCOE_F    RXF_FCOE_V(1U)
+
+#define RXF_LRO_S    27
+#define RXF_LRO_V(x) ((x) << RXF_LRO_S)
+#define RXF_LRO_F    RXF_LRO_V(1U)
+
 /* rx_pkt.l2info fields */
 #define RX_ETHHDR_LEN_S    0
 #define RX_ETHHDR_LEN_M    0x1F

@@ -846,6 +866,11 @@ struct cpl_rx_pkt {
 #define RX_IPHDR_LEN_V(x) ((x) << RX_IPHDR_LEN_S)
 #define RX_IPHDR_LEN_G(x) (((x) >> RX_IPHDR_LEN_S) & RX_IPHDR_LEN_M)
 
+/* rx_pkt.err_vec fields */
+#define RXERR_CSUM_S    13
+#define RXERR_CSUM_V(x) ((x) << RXERR_CSUM_S)
+#define RXERR_CSUM_F    RXERR_CSUM_V(1U)
+
 struct cpl_trace_pkt {
 	u8 opcode;
 	u8 intf;

new file mode 100644
index 0000000..062d3c0
@@ -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 0;
+	}
+
+	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 0;
+	}
+
+	return 1;
+}
+
+/**
+ * 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 */

index dd4b2da..e40e283 100644
@@ -1271,6 +1271,10 @@ static u16 cxgb_select_queue(struct net_device *dev, struct sk_buff *skb,
 			txq = 0;
 		} else {
 			txq = (vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+#ifdef CONFIG_CHELSIO_T4_FCOE
+			if (skb->protocol == htons(ETH_P_FCOE))
+				txq = skb->priority & 0x7;
+#endif /* CONFIG_CHELSIO_T4_FCOE */
 		}
 		return txq;
 	}

@@ -4578,6 +4582,10 @@ static const struct net_device_ops cxgb4_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller  = cxgb_netpoll,
 #endif
+#ifdef CONFIG_CHELSIO_T4_FCOE
+	.ndo_fcoe_enable      = cxgb_fcoe_enable,
+	.ndo_fcoe_disable     = cxgb_fcoe_disable,
+#endif /* CONFIG_CHELSIO_T4_FCOE */
 #ifdef CONFIG_NET_RX_BUSY_POLL
 	.ndo_busy_poll        = cxgb_busy_poll,
 #endif

122 lines not on this page · raw message