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dea31012005-04-17 16:05:31 -05001/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04003 * Fibre Channel Host Bus Adapters. *
James Smarte47c9092008-02-08 18:49:26 -05004 * Copyright (C) 2004-2008 Emulex. All rights reserved. *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04005 * EMULEX and SLI are trademarks of Emulex. *
dea31012005-04-17 16:05:31 -05006 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04009 * 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. *
dea31012005-04-17 16:05:31 -050019 *******************************************************************/
20
dea31012005-04-17 16:05:31 -050021#define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */
James Smart6a9c52c2009-10-02 15:16:51 -040022#define FC_MAX_NS_RSP 64512 /* max size NameServer rsp */
dea31012005-04-17 16:05:31 -050023#define FC_MAXLOOP 126 /* max devices supported on a fc loop */
24#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
25
26
27/* This is the protocol dependent definition for a Node List Entry.
28 * This is used by Fibre Channel protocol to support FCP.
29 */
30
Jamie Wellnitz41415862006-02-28 19:25:27 -050031/* worker thread events */
32enum lpfc_work_type {
Jamie Wellnitz41415862006-02-28 19:25:27 -050033 LPFC_EVT_ONLINE,
James Smart46fa3112007-04-25 09:51:45 -040034 LPFC_EVT_OFFLINE_PREP,
Jamie Wellnitz41415862006-02-28 19:25:27 -050035 LPFC_EVT_OFFLINE,
36 LPFC_EVT_WARM_START,
37 LPFC_EVT_KILL,
38 LPFC_EVT_ELS_RETRY,
James Smart92d7f7b2007-06-17 19:56:38 -050039 LPFC_EVT_DEV_LOSS,
James Smartea2151b2008-09-07 11:52:10 -040040 LPFC_EVT_FASTPATH_MGMT_EVT,
James Smart78730cf2010-04-06 15:06:30 -040041 LPFC_EVT_RESET_HBA,
Jamie Wellnitz41415862006-02-28 19:25:27 -050042};
43
dea31012005-04-17 16:05:31 -050044/* structure used to queue event to the discovery tasklet */
45struct lpfc_work_evt {
46 struct list_head evt_listp;
James Smart92d7f7b2007-06-17 19:56:38 -050047 void *evt_arg1;
48 void *evt_arg2;
Jamie Wellnitz41415862006-02-28 19:25:27 -050049 enum lpfc_work_type evt;
dea31012005-04-17 16:05:31 -050050};
51
James Smartea2151b2008-09-07 11:52:10 -040052struct lpfc_scsi_check_condition_event;
53struct lpfc_scsi_varqueuedepth_event;
54struct lpfc_scsi_event_header;
55struct lpfc_fabric_event_header;
56struct lpfc_fcprdchkerr_event;
57
58/* structure used for sending events from fast path */
59struct lpfc_fast_path_event {
60 struct lpfc_work_evt work_evt;
61 struct lpfc_vport *vport;
62 union {
63 struct lpfc_scsi_check_condition_event check_cond_evt;
64 struct lpfc_scsi_varqueuedepth_event queue_depth_evt;
65 struct lpfc_scsi_event_header scsi_evt;
66 struct lpfc_fabric_event_header fabric_evt;
67 struct lpfc_fcprdchkerr_event read_check_error;
68 } un;
69};
dea31012005-04-17 16:05:31 -050070
71struct lpfc_nodelist {
72 struct list_head nlp_listp;
James Smart2e0fef82007-06-17 19:56:36 -050073 struct lpfc_name nlp_portname;
74 struct lpfc_name nlp_nodename;
dea31012005-04-17 16:05:31 -050075 uint32_t nlp_flag; /* entry flags */
76 uint32_t nlp_DID; /* FC D_ID of entry */
77 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
78 uint16_t nlp_type;
79#define NLP_FC_NODE 0x1 /* entry is an FC node */
80#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
81#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
82#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
83
84 uint16_t nlp_rpi;
85 uint16_t nlp_state; /* state transition indicator */
Jamie Wellnitz5024ab12006-02-28 19:25:28 -050086 uint16_t nlp_prev_state; /* state transition indicator */
dea31012005-04-17 16:05:31 -050087 uint16_t nlp_xri; /* output exchange id for RPI */
88 uint16_t nlp_sid; /* scsi id */
89#define NLP_NO_SID 0xffff
90 uint16_t nlp_maxframe; /* Max RCV frame size */
91 uint8_t nlp_class_sup; /* Supported Classes */
92 uint8_t nlp_retry; /* used for ELS retries */
dea31012005-04-17 16:05:31 -050093 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
94#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
95
James Smarte47c9092008-02-08 18:49:26 -050096 uint16_t nlp_usg_map; /* ndlp management usage bitmap */
97#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
98#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
99#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
100#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
101
dea31012005-04-17 16:05:31 -0500102 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
James Smarta257bf92009-04-06 18:48:10 -0400103 struct lpfc_hba *phba;
dea31012005-04-17 16:05:31 -0500104 struct fc_rport *rport; /* Corresponding FC transport
105 port structure */
James Smart2e0fef82007-06-17 19:56:36 -0500106 struct lpfc_vport *vport;
dea31012005-04-17 16:05:31 -0500107 struct lpfc_work_evt els_retry_evt;
James Smart92d7f7b2007-06-17 19:56:38 -0500108 struct lpfc_work_evt dev_loss_evt;
James Smart329f9bc2007-04-25 09:53:01 -0400109 struct kref kref;
James Smart977b5a02008-09-07 11:52:04 -0400110 atomic_t cmd_pending;
111 uint32_t cmd_qdepth;
112 unsigned long last_change_time;
James Smartea2151b2008-09-07 11:52:10 -0400113 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
dea31012005-04-17 16:05:31 -0500114};
115
116/* Defines for nlp_flag (uint32) */
James Smartffc95492010-06-07 15:23:17 -0400117#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
118#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
James Smart7f5f3d02008-02-08 18:50:14 -0500119#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
120#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
121#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
122#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
123#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
124#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
125#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
126#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
127#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
128#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
129#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
130#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
131#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
dea31012005-04-17 16:05:31 -0500132 ACC */
James Smart7f5f3d02008-02-08 18:50:14 -0500133#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
dea31012005-04-17 16:05:31 -0500134 NPR list */
James Smart7f5f3d02008-02-08 18:50:14 -0500135#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
136#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
James Smart92d7f7b2007-06-17 19:56:38 -0500137#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
James Smart7f5f3d02008-02-08 18:50:14 -0500138#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
James Smartf4b4c682009-05-22 14:53:12 -0400139#define NLP_RPI_VALID 0x80000000 /* nlp_rpi is valid */
dea31012005-04-17 16:05:31 -0500140
James Smarte47c9092008-02-08 18:49:26 -0500141/* ndlp usage management macros */
142#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
143 & NLP_USG_NODE_ACT_BIT) \
144 && \
145 !((ndlp)->nlp_usg_map \
146 & NLP_USG_FREE_ACK_BIT))
147#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
148 |= NLP_USG_NODE_ACT_BIT)
149#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
150 = NLP_USG_NODE_ACT_BIT)
151#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
152 &= ~NLP_USG_NODE_ACT_BIT)
153#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
154 & NLP_USG_IACT_REQ_BIT)
155#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
156 |= NLP_USG_IACT_REQ_BIT)
157#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
158 & NLP_USG_FREE_REQ_BIT)
159#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
160 |= NLP_USG_FREE_REQ_BIT)
161#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
162 & NLP_USG_FREE_ACK_BIT)
163#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
164 |= NLP_USG_FREE_ACK_BIT)
165
dea31012005-04-17 16:05:31 -0500166/* There are 4 different double linked lists nodelist entries can reside on.
167 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
168 * when Link Up discovery or Registered State Change Notification (RSCN)
169 * processing is needed. Each list holds the nodes that require a PLOGI or
170 * ADISC Extended Link Service (ELS) request. These lists keep track of the
171 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
172 * by Link Up) event. The unmapped_list contains all nodes that have
173 * successfully logged into at the Fibre Channel level. The
174 * mapped_list will contain all nodes that are mapped FCP targets.
175 *
176 * The bind list is a list of undiscovered (potentially non-existent) nodes
177 * that we have saved binding information on. This information is used when
178 * nodes transition from the unmapped to the mapped list.
179 */
180
181/* Defines for nlp_state */
182#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
183#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
184#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
185#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
186#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
187#define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */
188#define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */
189#define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */
190#define NLP_STE_MAX_STATE 0x8
191#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
192
193/* For UNUSED_NODE state, the node has just been allocated.
194 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
195 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
196 * and put on the unmapped list. For ADISC processing, the node is taken off
197 * the ADISC list and placed on either the mapped or unmapped list (depending
198 * on its previous state). Once on the unmapped list, a PRLI is issued and the
199 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
200 * changed to PRLI_COMPL. If the completion indicates a mapped
201 * node, the node is taken off the unmapped list. The binding list is checked
202 * for a valid binding, or a binding is automatically assigned. If binding
203 * assignment is unsuccessful, the node is left on the unmapped list. If
204 * binding assignment is successful, the associated binding list entry (if
205 * any) is removed, and the node is placed on the mapped list.
206 */
207/*
208 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
James Smartc01f3202006-08-18 17:47:08 -0400209 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
dea31012005-04-17 16:05:31 -0500210 * expire, all effected nodes will receive a DEVICE_RM event.
211 */
212/*
213 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
214 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
215 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
216 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
217 * we will first process the ADISC list. 32 entries are processed initially and
218 * ADISC is initited for each one. Completions / Events for each node are
219 * funnelled thru the state machine. As each node finishes ADISC processing, it
220 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
221 * waiting, and the ADISC list count is identically 0, then we are done. For
222 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
223 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
224 * list. 32 entries are processed initially and PLOGI is initited for each one.
225 * Completions / Events for each node are funnelled thru the state machine. As
226 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
227 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
228 * identically 0, then we are done. We have now completed discovery / RSCN
229 * handling. Upon completion, ALL nodes should be on either the mapped or
230 * unmapped lists.
231 */
232
233/* Defines for Node List Entry Events that could happen */
234#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
235#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
236#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
237#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
238#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
239#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
240#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
241#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
242#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
243#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
244#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
245#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
246#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
247#define NLP_EVT_MAX_EVENT 0xd
248