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1 | /* |
2 | * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. | |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * more details. | |
12 | * | |
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. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #ifndef _LIBFCOE_H | |
21 | #define _LIBFCOE_H | |
22 | ||
23 | #include <linux/netdevice.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <scsi/fc/fc_fcoe.h> | |
26 | #include <scsi/libfc.h> | |
27 | ||
28 | /* | |
29 | * this percpu struct for fcoe | |
30 | */ | |
31 | struct fcoe_percpu_s { | |
32 | int cpu; | |
33 | struct task_struct *thread; | |
34 | struct sk_buff_head fcoe_rx_list; | |
35 | struct page *crc_eof_page; | |
36 | int crc_eof_offset; | |
37 | }; | |
38 | ||
39 | /* | |
40 | * the fcoe sw transport private data | |
41 | */ | |
42 | struct fcoe_softc { | |
43 | struct list_head list; | |
44 | struct fc_lport *lp; | |
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; | |
c826a314 | 49 | u8 fcoe_pending_queue_active; |
85b4aa49 RL |
50 | |
51 | u8 dest_addr[ETH_ALEN]; | |
52 | u8 ctl_src_addr[ETH_ALEN]; | |
53 | u8 data_src_addr[ETH_ALEN]; | |
54 | /* | |
55 | * fcoe protocol address learning related stuff | |
56 | */ | |
57 | u16 flogi_oxid; | |
58 | u8 flogi_progress; | |
59 | u8 address_mode; | |
60 | }; | |
61 | ||
85b4aa49 RL |
62 | static inline struct net_device *fcoe_netdev( |
63 | const struct fc_lport *lp) | |
64 | { | |
fc47ff6b | 65 | return ((struct fcoe_softc *)lport_priv(lp))->real_dev; |
85b4aa49 RL |
66 | } |
67 | ||
68 | static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb) | |
69 | { | |
70 | return (struct fcoe_hdr *)skb_network_header(skb); | |
71 | } | |
72 | ||
73 | static inline int skb_fcoe_offset(const struct sk_buff *skb) | |
74 | { | |
75 | return skb_network_offset(skb); | |
76 | } | |
77 | ||
78 | static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb) | |
79 | { | |
80 | return (struct fc_frame_header *)skb_transport_header(skb); | |
81 | } | |
82 | ||
83 | static inline int skb_fc_offset(const struct sk_buff *skb) | |
84 | { | |
85 | return skb_transport_offset(skb); | |
86 | } | |
87 | ||
88 | static inline void skb_reset_fc_header(struct sk_buff *skb) | |
89 | { | |
90 | skb_reset_network_header(skb); | |
91 | skb_set_transport_header(skb, skb_network_offset(skb) + | |
92 | sizeof(struct fcoe_hdr)); | |
93 | } | |
94 | ||
95 | static inline bool skb_fc_is_data(const struct sk_buff *skb) | |
96 | { | |
97 | return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA; | |
98 | } | |
99 | ||
100 | static inline bool skb_fc_is_cmd(const struct sk_buff *skb) | |
101 | { | |
102 | return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD; | |
103 | } | |
104 | ||
105 | static inline bool skb_fc_has_exthdr(const struct sk_buff *skb) | |
106 | { | |
107 | return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) || | |
108 | (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) || | |
109 | (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH); | |
110 | } | |
111 | ||
112 | static inline bool skb_fc_is_roff(const struct sk_buff *skb) | |
113 | { | |
114 | return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF; | |
115 | } | |
116 | ||
117 | static inline u16 skb_fc_oxid(const struct sk_buff *skb) | |
118 | { | |
119 | return be16_to_cpu(skb_fc_header(skb)->fh_ox_id); | |
120 | } | |
121 | ||
122 | static inline u16 skb_fc_rxid(const struct sk_buff *skb) | |
123 | { | |
124 | return be16_to_cpu(skb_fc_header(skb)->fh_rx_id); | |
125 | } | |
126 | ||
127 | /* FIXME - DMA_BIDIRECTIONAL ? */ | |
128 | #define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0])) | |
129 | #define skb_cmd(skb) (skb_cb(skb)->fr_cmd) | |
130 | #define skb_dir(skb) (skb_cmd(skb)->sc_data_direction) | |
131 | static inline bool skb_fc_is_read(const struct sk_buff *skb) | |
132 | { | |
133 | if (skb_fc_is_cmd(skb) && skb_cmd(skb)) | |
134 | return skb_dir(skb) == DMA_FROM_DEVICE; | |
135 | return false; | |
136 | } | |
137 | ||
138 | static inline bool skb_fc_is_write(const struct sk_buff *skb) | |
139 | { | |
140 | if (skb_fc_is_cmd(skb) && skb_cmd(skb)) | |
141 | return skb_dir(skb) == DMA_TO_DEVICE; | |
142 | return false; | |
143 | } | |
144 | ||
145 | /* libfcoe funcs */ | |
146 | int fcoe_reset(struct Scsi_Host *shost); | |
147 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
148 | unsigned int scheme, unsigned int port); | |
149 | ||
150 | u32 fcoe_fc_crc(struct fc_frame *fp); | |
151 | int fcoe_xmit(struct fc_lport *, struct fc_frame *); | |
152 | int fcoe_rcv(struct sk_buff *, struct net_device *, | |
153 | struct packet_type *, struct net_device *); | |
154 | ||
155 | int fcoe_percpu_receive_thread(void *arg); | |
156 | void fcoe_clean_pending_queue(struct fc_lport *lp); | |
157 | void fcoe_percpu_clean(struct fc_lport *lp); | |
158 | void fcoe_watchdog(ulong vp); | |
159 | int fcoe_link_ok(struct fc_lport *lp); | |
160 | ||
161 | struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
162 | int fcoe_hostlist_add(const struct fc_lport *); | |
163 | int fcoe_hostlist_remove(const struct fc_lport *); | |
164 | ||
165 | struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int); | |
166 | int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *); | |
167 | ||
168 | /* fcoe sw hba */ | |
169 | int __init fcoe_sw_init(void); | |
170 | int __exit fcoe_sw_exit(void); | |
171 | #endif /* _LIBFCOE_H */ |