2 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 #include <linux/netdevice.h>
24 #include <linux/skbuff.h>
25 #include <scsi/fc/fc_fcoe.h>
26 #include <scsi/libfc.h>
29 * this percpu struct for fcoe
31 struct fcoe_percpu_s {
33 struct task_struct *thread;
34 struct sk_buff_head fcoe_rx_list;
35 struct page *crc_eof_page;
40 * the fcoe sw transport private data
43 struct list_head list;
45 struct net_device *real_dev;
46 struct net_device *phys_dev; /* device with ethtool_ops */
47 struct packet_type fcoe_packet_type;
48 struct sk_buff_head fcoe_pending_queue;
50 u8 dest_addr[ETH_ALEN];
51 u8 ctl_src_addr[ETH_ALEN];
52 u8 data_src_addr[ETH_ALEN];
54 * fcoe protocol address learning related stuff
61 static inline struct net_device *fcoe_netdev(
62 const struct fc_lport *lp)
64 return ((struct fcoe_softc *)lport_priv(lp))->real_dev;
67 static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
69 return (struct fcoe_hdr *)skb_network_header(skb);
72 static inline int skb_fcoe_offset(const struct sk_buff *skb)
74 return skb_network_offset(skb);
77 static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb)
79 return (struct fc_frame_header *)skb_transport_header(skb);
82 static inline int skb_fc_offset(const struct sk_buff *skb)
84 return skb_transport_offset(skb);
87 static inline void skb_reset_fc_header(struct sk_buff *skb)
89 skb_reset_network_header(skb);
90 skb_set_transport_header(skb, skb_network_offset(skb) +
91 sizeof(struct fcoe_hdr));
94 static inline bool skb_fc_is_data(const struct sk_buff *skb)
96 return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA;
99 static inline bool skb_fc_is_cmd(const struct sk_buff *skb)
101 return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD;
104 static inline bool skb_fc_has_exthdr(const struct sk_buff *skb)
106 return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) ||
107 (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) ||
108 (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH);
111 static inline bool skb_fc_is_roff(const struct sk_buff *skb)
113 return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF;
116 static inline u16 skb_fc_oxid(const struct sk_buff *skb)
118 return be16_to_cpu(skb_fc_header(skb)->fh_ox_id);
121 static inline u16 skb_fc_rxid(const struct sk_buff *skb)
123 return be16_to_cpu(skb_fc_header(skb)->fh_rx_id);
126 /* FIXME - DMA_BIDIRECTIONAL ? */
127 #define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0]))
128 #define skb_cmd(skb) (skb_cb(skb)->fr_cmd)
129 #define skb_dir(skb) (skb_cmd(skb)->sc_data_direction)
130 static inline bool skb_fc_is_read(const struct sk_buff *skb)
132 if (skb_fc_is_cmd(skb) && skb_cmd(skb))
133 return skb_dir(skb) == DMA_FROM_DEVICE;
137 static inline bool skb_fc_is_write(const struct sk_buff *skb)
139 if (skb_fc_is_cmd(skb) && skb_cmd(skb))
140 return skb_dir(skb) == DMA_TO_DEVICE;
145 int fcoe_reset(struct Scsi_Host *shost);
146 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
147 unsigned int scheme, unsigned int port);
149 u32 fcoe_fc_crc(struct fc_frame *fp);
150 int fcoe_xmit(struct fc_lport *, struct fc_frame *);
151 int fcoe_rcv(struct sk_buff *, struct net_device *,
152 struct packet_type *, struct net_device *);
154 int fcoe_percpu_receive_thread(void *arg);
155 void fcoe_clean_pending_queue(struct fc_lport *lp);
156 void fcoe_percpu_clean(struct fc_lport *lp);
157 void fcoe_watchdog(ulong vp);
158 int fcoe_link_ok(struct fc_lport *lp);
160 struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
161 int fcoe_hostlist_add(const struct fc_lport *);
162 int fcoe_hostlist_remove(const struct fc_lport *);
164 struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
165 int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
168 int __init fcoe_sw_init(void);
169 int __exit fcoe_sw_exit(void);
170 #endif /* _LIBFCOE_H */