1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2008 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 */
34 LPFC_EVT_OFFLINE_PREP,
42 /* structure used to queue event to the discovery tasklet */
43 struct lpfc_work_evt {
44 struct list_head evt_listp;
47 enum lpfc_work_type evt;
51 struct lpfc_nodelist {
52 struct list_head nlp_listp;
53 struct lpfc_name nlp_portname;
54 struct lpfc_name nlp_nodename;
55 uint32_t nlp_flag; /* entry flags */
56 uint32_t nlp_DID; /* FC D_ID of entry */
57 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
59 #define NLP_FC_NODE 0x1 /* entry is an FC node */
60 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
61 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
62 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
65 uint16_t nlp_state; /* state transition indicator */
66 uint16_t nlp_prev_state; /* state transition indicator */
67 uint16_t nlp_xri; /* output exchange id for RPI */
68 uint16_t nlp_sid; /* scsi id */
69 #define NLP_NO_SID 0xffff
70 uint16_t nlp_maxframe; /* Max RCV frame size */
71 uint8_t nlp_class_sup; /* Supported Classes */
72 uint8_t nlp_retry; /* used for ELS retries */
73 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
74 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
76 uint16_t nlp_usg_map; /* ndlp management usage bitmap */
77 #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
78 #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
79 #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
80 #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
82 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
83 struct fc_rport *rport; /* Corresponding FC transport
85 struct lpfc_vport *vport;
86 struct lpfc_work_evt els_retry_evt;
87 struct lpfc_work_evt dev_loss_evt;
88 unsigned long last_ramp_up_time; /* jiffy of last ramp up */
89 unsigned long last_q_full_time; /* jiffy of last queue full */
93 /* Defines for nlp_flag (uint32) */
94 #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
95 #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
96 #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
97 #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
98 #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
99 #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
100 #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
101 #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
102 #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
103 #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
104 #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
105 #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
106 #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
108 #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
110 #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
111 #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
112 #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
113 #define NLP_SC_REQ 0x20000000 /* Target requires authentication */
115 /* ndlp usage management macros */
116 #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
117 & NLP_USG_NODE_ACT_BIT) \
119 !((ndlp)->nlp_usg_map \
120 & NLP_USG_FREE_ACK_BIT))
121 #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
122 |= NLP_USG_NODE_ACT_BIT)
123 #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
124 = NLP_USG_NODE_ACT_BIT)
125 #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
126 &= ~NLP_USG_NODE_ACT_BIT)
127 #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
128 & NLP_USG_IACT_REQ_BIT)
129 #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
130 |= NLP_USG_IACT_REQ_BIT)
131 #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
132 & NLP_USG_FREE_REQ_BIT)
133 #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
134 |= NLP_USG_FREE_REQ_BIT)
135 #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
136 & NLP_USG_FREE_ACK_BIT)
137 #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
138 |= NLP_USG_FREE_ACK_BIT)
140 /* There are 4 different double linked lists nodelist entries can reside on.
141 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
142 * when Link Up discovery or Registered State Change Notification (RSCN)
143 * processing is needed. Each list holds the nodes that require a PLOGI or
144 * ADISC Extended Link Service (ELS) request. These lists keep track of the
145 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
146 * by Link Up) event. The unmapped_list contains all nodes that have
147 * successfully logged into at the Fibre Channel level. The
148 * mapped_list will contain all nodes that are mapped FCP targets.
150 * The bind list is a list of undiscovered (potentially non-existent) nodes
151 * that we have saved binding information on. This information is used when
152 * nodes transition from the unmapped to the mapped list.
155 /* Defines for nlp_state */
156 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
157 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
158 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
159 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
160 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
161 #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */
162 #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */
163 #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */
164 #define NLP_STE_MAX_STATE 0x8
165 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
167 /* For UNUSED_NODE state, the node has just been allocated.
168 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
169 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
170 * and put on the unmapped list. For ADISC processing, the node is taken off
171 * the ADISC list and placed on either the mapped or unmapped list (depending
172 * on its previous state). Once on the unmapped list, a PRLI is issued and the
173 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
174 * changed to PRLI_COMPL. If the completion indicates a mapped
175 * node, the node is taken off the unmapped list. The binding list is checked
176 * for a valid binding, or a binding is automatically assigned. If binding
177 * assignment is unsuccessful, the node is left on the unmapped list. If
178 * binding assignment is successful, the associated binding list entry (if
179 * any) is removed, and the node is placed on the mapped list.
182 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
183 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
184 * expire, all effected nodes will receive a DEVICE_RM event.
187 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
188 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
189 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
190 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
191 * we will first process the ADISC list. 32 entries are processed initially and
192 * ADISC is initited for each one. Completions / Events for each node are
193 * funnelled thru the state machine. As each node finishes ADISC processing, it
194 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
195 * waiting, and the ADISC list count is identically 0, then we are done. For
196 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
197 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
198 * list. 32 entries are processed initially and PLOGI is initited for each one.
199 * Completions / Events for each node are funnelled thru the state machine. As
200 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
201 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
202 * identically 0, then we are done. We have now completed discovery / RSCN
203 * handling. Upon completion, ALL nodes should be on either the mapped or
207 /* Defines for Node List Entry Events that could happen */
208 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
209 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
210 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
211 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
212 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
213 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
214 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
215 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
216 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
217 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
218 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
219 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
220 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
221 #define NLP_EVT_MAX_EVENT 0xd