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1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Enterprise Fibre Channel Host Bus Adapters. *
4 * Refer to the README file included with this package for *
5 * driver version and adapter support. *
6 * Copyright (C) 2004 Emulex Corporation. *
7 * www.emulex.com *
8 * *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of the GNU General Public License *
11 * as published by the Free Software Foundation; either version 2 *
12 * of the License, or (at your option) any later version. *
13 * *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17 * GNU General Public License for more details, a copy of which *
18 * can be found in the file COPYING included with this package. *
19 *******************************************************************/
20
21/*
22 * $Id: lpfc_disc.h 1.61 2005/04/07 08:46:52EDT sf_support Exp $
23 */
24
25#define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */
26#define FC_MAX_NS_RSP 65536 /* max size NameServer rsp */
27#define FC_MAXLOOP 126 /* max devices supported on a fc loop */
28#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
29
30
31/* This is the protocol dependent definition for a Node List Entry.
32 * This is used by Fibre Channel protocol to support FCP.
33 */
34
35/* structure used to queue event to the discovery tasklet */
36struct lpfc_work_evt {
37 struct list_head evt_listp;
38 void * evt_arg1;
39 void * evt_arg2;
40 uint32_t evt;
41};
42
43#define LPFC_EVT_NODEV_TMO 0x1
44#define LPFC_EVT_ONLINE 0x2
45#define LPFC_EVT_OFFLINE 0x3
46#define LPFC_EVT_ELS_RETRY 0x4
47
48struct lpfc_nodelist {
49 struct list_head nlp_listp;
50 struct lpfc_name nlp_portname; /* port name */
51 struct lpfc_name nlp_nodename; /* node name */
52 uint32_t nlp_flag; /* entry flags */
53 uint32_t nlp_DID; /* FC D_ID of entry */
54 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
55 uint16_t nlp_type;
56#define NLP_FC_NODE 0x1 /* entry is an FC node */
57#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
58#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
59#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
60
61 uint16_t nlp_rpi;
62 uint16_t nlp_state; /* state transition indicator */
63 uint16_t nlp_xri; /* output exchange id for RPI */
64 uint16_t nlp_sid; /* scsi id */
65#define NLP_NO_SID 0xffff
66 uint16_t nlp_maxframe; /* Max RCV frame size */
67 uint8_t nlp_class_sup; /* Supported Classes */
68 uint8_t nlp_retry; /* used for ELS retries */
69 uint8_t nlp_disc_refcnt; /* used for DSM */
70 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
71#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
72
73 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
74 struct timer_list nlp_tmofunc; /* Used for nodev tmo */
75 struct fc_rport *rport; /* Corresponding FC transport
76 port structure */
77 struct lpfc_nodelist *nlp_rpi_hash_next;
78 struct lpfc_hba *nlp_phba;
79 struct lpfc_work_evt nodev_timeout_evt;
80 struct lpfc_work_evt els_retry_evt;
81};
82
83/* Defines for nlp_flag (uint32) */
84#define NLP_NO_LIST 0x0 /* Indicates immediately free node */
85#define NLP_UNUSED_LIST 0x1 /* Flg to indicate node will be freed */
86#define NLP_PLOGI_LIST 0x2 /* Flg to indicate sent PLOGI */
87#define NLP_ADISC_LIST 0x3 /* Flg to indicate sent ADISC */
88#define NLP_REGLOGIN_LIST 0x4 /* Flg to indicate sent REG_LOGIN */
89#define NLP_PRLI_LIST 0x5 /* Flg to indicate sent PRLI */
90#define NLP_UNMAPPED_LIST 0x6 /* Node is now unmapped */
91#define NLP_MAPPED_LIST 0x7 /* Node is now mapped */
92#define NLP_NPR_LIST 0x8 /* Node is in NPort Recovery state */
93#define NLP_JUST_DQ 0x9 /* just deque ndlp in lpfc_nlp_list */
94#define NLP_LIST_MASK 0xf /* mask to see what list node is on */
95#define NLP_PLOGI_SND 0x20 /* sent PLOGI request for this entry */
96#define NLP_PRLI_SND 0x40 /* sent PRLI request for this entry */
97#define NLP_ADISC_SND 0x80 /* sent ADISC request for this entry */
98#define NLP_LOGO_SND 0x100 /* sent LOGO request for this entry */
99#define NLP_RNID_SND 0x400 /* sent RNID request for this entry */
100#define NLP_ELS_SND_MASK 0x7e0 /* sent ELS request for this entry */
101#define NLP_NODEV_TMO 0x10000 /* nodev timeout is running for node */
102#define NLP_DELAY_TMO 0x20000 /* delay timeout is running for node */
103#define NLP_NPR_2B_DISC 0x40000 /* node is included in num_disc_nodes */
104#define NLP_RCV_PLOGI 0x80000 /* Rcv'ed PLOGI from remote system */
105#define NLP_LOGO_ACC 0x100000 /* Process LOGO after ACC completes */
106#define NLP_TGT_NO_SCSIID 0x200000 /* good PRLI but no binding for scsid */
107#define NLP_ACC_REGLOGIN 0x1000000 /* Issue Reg Login after successful
108 ACC */
109#define NLP_NPR_ADISC 0x2000000 /* Issue ADISC when dq'ed from
110 NPR list */
111#define NLP_DELAY_REMOVE 0x4000000 /* Defer removal till end of DSM */
112
113/* Defines for list searchs */
114#define NLP_SEARCH_MAPPED 0x1 /* search mapped */
115#define NLP_SEARCH_UNMAPPED 0x2 /* search unmapped */
116#define NLP_SEARCH_PLOGI 0x4 /* search plogi */
117#define NLP_SEARCH_ADISC 0x8 /* search adisc */
118#define NLP_SEARCH_REGLOGIN 0x10 /* search reglogin */
119#define NLP_SEARCH_PRLI 0x20 /* search prli */
120#define NLP_SEARCH_NPR 0x40 /* search npr */
121#define NLP_SEARCH_UNUSED 0x80 /* search mapped */
122#define NLP_SEARCH_ALL 0xff /* search all lists */
123
124/* There are 4 different double linked lists nodelist entries can reside on.
125 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
126 * when Link Up discovery or Registered State Change Notification (RSCN)
127 * processing is needed. Each list holds the nodes that require a PLOGI or
128 * ADISC Extended Link Service (ELS) request. These lists keep track of the
129 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
130 * by Link Up) event. The unmapped_list contains all nodes that have
131 * successfully logged into at the Fibre Channel level. The
132 * mapped_list will contain all nodes that are mapped FCP targets.
133 *
134 * The bind list is a list of undiscovered (potentially non-existent) nodes
135 * that we have saved binding information on. This information is used when
136 * nodes transition from the unmapped to the mapped list.
137 */
138
139/* Defines for nlp_state */
140#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
141#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
142#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
143#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
144#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
145#define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */
146#define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */
147#define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */
148#define NLP_STE_MAX_STATE 0x8
149#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
150
151/* For UNUSED_NODE state, the node has just been allocated.
152 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
153 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
154 * and put on the unmapped list. For ADISC processing, the node is taken off
155 * the ADISC list and placed on either the mapped or unmapped list (depending
156 * on its previous state). Once on the unmapped list, a PRLI is issued and the
157 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
158 * changed to PRLI_COMPL. If the completion indicates a mapped
159 * node, the node is taken off the unmapped list. The binding list is checked
160 * for a valid binding, or a binding is automatically assigned. If binding
161 * assignment is unsuccessful, the node is left on the unmapped list. If
162 * binding assignment is successful, the associated binding list entry (if
163 * any) is removed, and the node is placed on the mapped list.
164 */
165/*
166 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
167 * lists will receive a DEVICE_RECOVERY event. If the linkdown or nodev timers
168 * expire, all effected nodes will receive a DEVICE_RM event.
169 */
170/*
171 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
172 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
173 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
174 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
175 * we will first process the ADISC list. 32 entries are processed initially and
176 * ADISC is initited for each one. Completions / Events for each node are
177 * funnelled thru the state machine. As each node finishes ADISC processing, it
178 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
179 * waiting, and the ADISC list count is identically 0, then we are done. For
180 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
181 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
182 * list. 32 entries are processed initially and PLOGI is initited for each one.
183 * Completions / Events for each node are funnelled thru the state machine. As
184 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
185 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
186 * identically 0, then we are done. We have now completed discovery / RSCN
187 * handling. Upon completion, ALL nodes should be on either the mapped or
188 * unmapped lists.
189 */
190
191/* Defines for Node List Entry Events that could happen */
192#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
193#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
194#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
195#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
196#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
197#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
198#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
199#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
200#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
201#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
202#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
203#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
204#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
205#define NLP_EVT_MAX_EVENT 0xd
206
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