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85b4aa49 | 1 | /* |
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2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2007-2008 Intel Corporation. All rights reserved. | |
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4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
21 | #ifndef _LIBFCOE_H | |
22 | #define _LIBFCOE_H | |
23 | ||
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24 | #include <linux/etherdevice.h> |
25 | #include <linux/if_ether.h> | |
85b4aa49 RL |
26 | #include <linux/netdevice.h> |
27 | #include <linux/skbuff.h> | |
97c8389d | 28 | #include <linux/workqueue.h> |
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29 | #include <scsi/fc/fc_fcoe.h> |
30 | #include <scsi/libfc.h> | |
31 | ||
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32 | /* |
33 | * FIP tunable parameters. | |
34 | */ | |
35 | #define FCOE_CTLR_START_DELAY 2000 /* mS after first adv. to choose FCF */ | |
36 | #define FCOE_CTRL_SOL_TOV 2000 /* min. solicitation interval (mS) */ | |
37 | #define FCOE_CTLR_FCF_LIMIT 20 /* max. number of FCF entries */ | |
38 | ||
39 | /** | |
40 | * enum fip_state - internal state of FCoE controller. | |
41 | * @FIP_ST_DISABLED: controller has been disabled or not yet enabled. | |
42 | * @FIP_ST_LINK_WAIT: the physical link is down or unusable. | |
43 | * @FIP_ST_AUTO: determining whether to use FIP or non-FIP mode. | |
44 | * @FIP_ST_NON_FIP: non-FIP mode selected. | |
45 | * @FIP_ST_ENABLED: FIP mode selected. | |
46 | */ | |
47 | enum fip_state { | |
48 | FIP_ST_DISABLED, | |
49 | FIP_ST_LINK_WAIT, | |
50 | FIP_ST_AUTO, | |
51 | FIP_ST_NON_FIP, | |
52 | FIP_ST_ENABLED, | |
53 | }; | |
54 | ||
55 | /** | |
56 | * struct fcoe_ctlr - FCoE Controller and FIP state. | |
57 | * @state: internal FIP state for network link and FIP or non-FIP mode. | |
58 | * @lp: &fc_lport: libfc local port. | |
59 | * @sel_fcf: currently selected FCF, or NULL. | |
60 | * @fcfs: list of discovered FCFs. | |
61 | * @fcf_count: number of discovered FCF entries. | |
62 | * @sol_time: time when a multicast solicitation was last sent. | |
63 | * @sel_time: time after which to select an FCF. | |
64 | * @port_ka_time: time of next port keep-alive. | |
65 | * @ctlr_ka_time: time of next controller keep-alive. | |
66 | * @timer: timer struct used for all delayed events. | |
67 | * @link_work: &work_struct for doing FCF selection. | |
68 | * @recv_work: &work_struct for receiving FIP frames. | |
69 | * @fip_recv_list: list of received FIP frames. | |
70 | * @user_mfs: configured maximum FC frame size, including FC header. | |
71 | * @flogi_oxid: exchange ID of most recent fabric login. | |
72 | * @flogi_count: number of FLOGI attempts in AUTO mode. | |
73 | * @link: current link status for libfc. | |
74 | * @last_link: last link state reported to libfc. | |
75 | * @map_dest: use the FC_MAP mode for destination MAC addresses. | |
184dd345 | 76 | * @spma: supports SPMA server-provided MACs mode |
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77 | * @send_ctlr_ka: need to send controller keep alive |
78 | * @send_port_ka: need to send port keep alives | |
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79 | * @dest_addr: MAC address of the selected FC forwarder. |
80 | * @ctl_src_addr: the native MAC address of our local port. | |
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81 | * @send: LLD-supplied function to handle sending of FIP Ethernet frames. |
82 | * @update_mac: LLD-supplied function to handle changes to MAC addresses. | |
11b56188 | 83 | * @get_src_addr: LLD-supplied function to supply a source MAC address. |
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84 | * @lock: lock protecting this structure. |
85 | * | |
86 | * This structure is used by all FCoE drivers. It contains information | |
87 | * needed by all FCoE low-level drivers (LLDs) as well as internal state | |
88 | * for FIP, and fields shared with the LLDS. | |
89 | */ | |
90 | struct fcoe_ctlr { | |
91 | enum fip_state state; | |
92 | struct fc_lport *lp; | |
93 | struct fcoe_fcf *sel_fcf; | |
94 | struct list_head fcfs; | |
95 | u16 fcf_count; | |
96 | unsigned long sol_time; | |
97 | unsigned long sel_time; | |
98 | unsigned long port_ka_time; | |
99 | unsigned long ctlr_ka_time; | |
100 | struct timer_list timer; | |
101 | struct work_struct link_work; | |
102 | struct work_struct recv_work; | |
103 | struct sk_buff_head fip_recv_list; | |
104 | u16 user_mfs; | |
105 | u16 flogi_oxid; | |
106 | u8 flogi_count; | |
107 | u8 link; | |
108 | u8 last_link; | |
109 | u8 map_dest; | |
184dd345 | 110 | u8 spma; |
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111 | u8 send_ctlr_ka; |
112 | u8 send_port_ka; | |
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113 | u8 dest_addr[ETH_ALEN]; |
114 | u8 ctl_src_addr[ETH_ALEN]; | |
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115 | |
116 | void (*send)(struct fcoe_ctlr *, struct sk_buff *); | |
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117 | void (*update_mac)(struct fc_lport *, u8 *addr); |
118 | u8 * (*get_src_addr)(struct fc_lport *); | |
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119 | spinlock_t lock; |
120 | }; | |
121 | ||
122 | /* | |
123 | * struct fcoe_fcf - Fibre-Channel Forwarder. | |
124 | * @list: list linkage. | |
125 | * @time: system time (jiffies) when an advertisement was last received. | |
126 | * @switch_name: WWN of switch from advertisement. | |
127 | * @fabric_name: WWN of fabric from advertisement. | |
128 | * @fc_map: FC_MAP value from advertisement. | |
129 | * @fcf_mac: Ethernet address of the FCF. | |
130 | * @vfid: virtual fabric ID. | |
131 | * @pri: seletion priority, smaller values are better. | |
132 | * @flags: flags received from advertisement. | |
133 | * @fka_period: keep-alive period, in jiffies. | |
134 | * | |
135 | * A Fibre-Channel Forwarder (FCF) is the entity on the Ethernet that | |
136 | * passes FCoE frames on to an FC fabric. This structure represents | |
137 | * one FCF from which advertisements have been received. | |
138 | * | |
139 | * When looking up an FCF, @switch_name, @fabric_name, @fc_map, @vfid, and | |
140 | * @fcf_mac together form the lookup key. | |
141 | */ | |
142 | struct fcoe_fcf { | |
143 | struct list_head list; | |
144 | unsigned long time; | |
145 | ||
146 | u64 switch_name; | |
147 | u64 fabric_name; | |
148 | u32 fc_map; | |
149 | u16 vfid; | |
150 | u8 fcf_mac[ETH_ALEN]; | |
151 | ||
152 | u8 pri; | |
153 | u16 flags; | |
154 | u32 fka_period; | |
155 | }; | |
156 | ||
157 | /* FIP API functions */ | |
158 | void fcoe_ctlr_init(struct fcoe_ctlr *); | |
159 | void fcoe_ctlr_destroy(struct fcoe_ctlr *); | |
160 | void fcoe_ctlr_link_up(struct fcoe_ctlr *); | |
161 | int fcoe_ctlr_link_down(struct fcoe_ctlr *); | |
11b56188 | 162 | int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct fc_lport *, struct sk_buff *); |
97c8389d | 163 | void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *); |
11b56188 CL |
164 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *lport, |
165 | struct fc_frame *fp, u8 *sa); | |
97c8389d | 166 | |
85b4aa49 | 167 | /* libfcoe funcs */ |
fdd78027 | 168 | u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int); |
85b4aa49 | 169 | int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *); |
fdd78027 | 170 | |
85b4aa49 | 171 | #endif /* _LIBFCOE_H */ |