1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2006 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
19 *******************************************************************/
21 #define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */
22 #define FC_MAX_NS_RSP 65536 /* max size NameServer rsp */
23 #define FC_MAXLOOP 126 /* max devices supported on a fc loop */
24 #define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
27 /* This is the protocol dependent definition for a Node List Entry.
28 * This is used by Fibre Channel protocol to support FCP.
31 /* worker thread events */
40 /* structure used to queue event to the discovery tasklet */
41 struct lpfc_work_evt {
42 struct list_head evt_listp;
45 enum lpfc_work_type evt;
49 struct lpfc_nodelist {
50 struct list_head nlp_listp;
51 struct lpfc_name nlp_portname; /* port name */
52 struct lpfc_name nlp_nodename; /* node name */
53 uint32_t nlp_flag; /* entry flags */
54 uint32_t nlp_DID; /* FC D_ID of entry */
55 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
57 #define NLP_FC_NODE 0x1 /* entry is an FC node */
58 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
59 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
60 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
63 uint16_t nlp_state; /* state transition indicator */
64 uint16_t nlp_prev_state; /* state transition indicator */
65 uint16_t nlp_xri; /* output exchange id for RPI */
66 uint16_t nlp_sid; /* scsi id */
67 #define NLP_NO_SID 0xffff
68 uint16_t nlp_maxframe; /* Max RCV frame size */
69 uint8_t nlp_class_sup; /* Supported Classes */
70 uint8_t nlp_retry; /* used for ELS retries */
71 uint8_t nlp_disc_refcnt; /* used for DSM */
72 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
73 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
75 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
76 struct fc_rport *rport; /* Corresponding FC transport
78 struct lpfc_hba *nlp_phba;
79 struct lpfc_work_evt els_retry_evt;
80 unsigned long last_ramp_up_time; /* jiffy of last ramp up */
81 unsigned long last_q_full_time; /* jiffy of last queue full */
84 /* Defines for nlp_flag (uint32) */
85 #define NLP_NO_LIST 0x0 /* Indicates immediately free node */
86 #define NLP_UNUSED_LIST 0x1 /* Flg to indicate node will be freed */
87 #define NLP_PLOGI_LIST 0x2 /* Flg to indicate sent PLOGI */
88 #define NLP_ADISC_LIST 0x3 /* Flg to indicate sent ADISC */
89 #define NLP_REGLOGIN_LIST 0x4 /* Flg to indicate sent REG_LOGIN */
90 #define NLP_PRLI_LIST 0x5 /* Flg to indicate sent PRLI */
91 #define NLP_UNMAPPED_LIST 0x6 /* Node is now unmapped */
92 #define NLP_MAPPED_LIST 0x7 /* Node is now mapped */
93 #define NLP_NPR_LIST 0x8 /* Node is in NPort Recovery state */
94 #define NLP_JUST_DQ 0x9 /* just deque ndlp in lpfc_nlp_list */
95 #define NLP_LIST_MASK 0xf /* mask to see what list node is on */
96 #define NLP_PLOGI_SND 0x20 /* sent PLOGI request for this entry */
97 #define NLP_PRLI_SND 0x40 /* sent PRLI request for this entry */
98 #define NLP_ADISC_SND 0x80 /* sent ADISC request for this entry */
99 #define NLP_LOGO_SND 0x100 /* sent LOGO request for this entry */
100 #define NLP_RNID_SND 0x400 /* sent RNID request for this entry */
101 #define NLP_ELS_SND_MASK 0x7e0 /* sent ELS request for this entry */
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
109 #define NLP_NPR_ADISC 0x2000000 /* Issue ADISC when dq'ed from
111 #define NLP_DELAY_REMOVE 0x4000000 /* Defer removal till end of DSM */
112 #define NLP_NODEV_REMOVE 0x8000000 /* Defer removal till discovery ends */
114 /* Defines for list searchs */
115 #define NLP_SEARCH_MAPPED 0x1 /* search mapped */
116 #define NLP_SEARCH_UNMAPPED 0x2 /* search unmapped */
117 #define NLP_SEARCH_PLOGI 0x4 /* search plogi */
118 #define NLP_SEARCH_ADISC 0x8 /* search adisc */
119 #define NLP_SEARCH_REGLOGIN 0x10 /* search reglogin */
120 #define NLP_SEARCH_PRLI 0x20 /* search prli */
121 #define NLP_SEARCH_NPR 0x40 /* search npr */
122 #define NLP_SEARCH_UNUSED 0x80 /* search mapped */
123 #define NLP_SEARCH_ALL 0xff /* search all lists */
125 /* There are 4 different double linked lists nodelist entries can reside on.
126 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
127 * when Link Up discovery or Registered State Change Notification (RSCN)
128 * processing is needed. Each list holds the nodes that require a PLOGI or
129 * ADISC Extended Link Service (ELS) request. These lists keep track of the
130 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
131 * by Link Up) event. The unmapped_list contains all nodes that have
132 * successfully logged into at the Fibre Channel level. The
133 * mapped_list will contain all nodes that are mapped FCP targets.
135 * The bind list is a list of undiscovered (potentially non-existent) nodes
136 * that we have saved binding information on. This information is used when
137 * nodes transition from the unmapped to the mapped list.
140 /* Defines for nlp_state */
141 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
142 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
143 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
144 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
145 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
146 #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */
147 #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */
148 #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */
149 #define NLP_STE_MAX_STATE 0x8
150 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
152 /* For UNUSED_NODE state, the node has just been allocated.
153 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
154 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
155 * and put on the unmapped list. For ADISC processing, the node is taken off
156 * the ADISC list and placed on either the mapped or unmapped list (depending
157 * on its previous state). Once on the unmapped list, a PRLI is issued and the
158 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
159 * changed to PRLI_COMPL. If the completion indicates a mapped
160 * node, the node is taken off the unmapped list. The binding list is checked
161 * for a valid binding, or a binding is automatically assigned. If binding
162 * assignment is unsuccessful, the node is left on the unmapped list. If
163 * binding assignment is successful, the associated binding list entry (if
164 * any) is removed, and the node is placed on the mapped list.
167 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
168 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
169 * expire, all effected nodes will receive a DEVICE_RM event.
172 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
173 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
174 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
175 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
176 * we will first process the ADISC list. 32 entries are processed initially and
177 * ADISC is initited for each one. Completions / Events for each node are
178 * funnelled thru the state machine. As each node finishes ADISC processing, it
179 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
180 * waiting, and the ADISC list count is identically 0, then we are done. For
181 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
182 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
183 * list. 32 entries are processed initially and PLOGI is initited for each one.
184 * Completions / Events for each node are funnelled thru the state machine. As
185 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
186 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
187 * identically 0, then we are done. We have now completed discovery / RSCN
188 * handling. Upon completion, ALL nodes should be on either the mapped or
192 /* Defines for Node List Entry Events that could happen */
193 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
194 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
195 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
196 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
197 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
198 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
199 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
200 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
201 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
202 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
203 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
204 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
205 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
206 #define NLP_EVT_MAX_EVENT 0xd