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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
James Smart19ca7602010-11-20 23:11:55 -050071#define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */
72#define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)
73struct lpfc_node_rrqs {
74 unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
75};
76
dea31012005-04-17 16:05:31 -050077struct lpfc_nodelist {
78 struct list_head nlp_listp;
James Smart2e0fef82007-06-17 19:56:36 -050079 struct lpfc_name nlp_portname;
80 struct lpfc_name nlp_nodename;
dea31012005-04-17 16:05:31 -050081 uint32_t nlp_flag; /* entry flags */
82 uint32_t nlp_DID; /* FC D_ID of entry */
83 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
84 uint16_t nlp_type;
85#define NLP_FC_NODE 0x1 /* entry is an FC node */
86#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
87#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
88#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
89
90 uint16_t nlp_rpi;
91 uint16_t nlp_state; /* state transition indicator */
Jamie Wellnitz5024ab12006-02-28 19:25:28 -050092 uint16_t nlp_prev_state; /* state transition indicator */
dea31012005-04-17 16:05:31 -050093 uint16_t nlp_xri; /* output exchange id for RPI */
94 uint16_t nlp_sid; /* scsi id */
95#define NLP_NO_SID 0xffff
96 uint16_t nlp_maxframe; /* Max RCV frame size */
97 uint8_t nlp_class_sup; /* Supported Classes */
98 uint8_t nlp_retry; /* used for ELS retries */
dea31012005-04-17 16:05:31 -050099 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
100#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
101
James Smarte47c9092008-02-08 18:49:26 -0500102 uint16_t nlp_usg_map; /* ndlp management usage bitmap */
103#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
104#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
105#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
106#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
107
dea31012005-04-17 16:05:31 -0500108 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
James Smarta257bf92009-04-06 18:48:10 -0400109 struct lpfc_hba *phba;
dea31012005-04-17 16:05:31 -0500110 struct fc_rport *rport; /* Corresponding FC transport
111 port structure */
James Smart2e0fef82007-06-17 19:56:36 -0500112 struct lpfc_vport *vport;
dea31012005-04-17 16:05:31 -0500113 struct lpfc_work_evt els_retry_evt;
James Smart92d7f7b2007-06-17 19:56:38 -0500114 struct lpfc_work_evt dev_loss_evt;
James Smart329f9bc2007-04-25 09:53:01 -0400115 struct kref kref;
James Smart977b5a02008-09-07 11:52:04 -0400116 atomic_t cmd_pending;
117 uint32_t cmd_qdepth;
118 unsigned long last_change_time;
James Smart19ca7602010-11-20 23:11:55 -0500119 struct lpfc_node_rrqs active_rrqs;
James Smartea2151b2008-09-07 11:52:10 -0400120 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
dea31012005-04-17 16:05:31 -0500121};
James Smart19ca7602010-11-20 23:11:55 -0500122struct lpfc_node_rrq {
123 struct list_head list;
124 uint16_t xritag;
125 uint16_t send_rrq;
126 uint16_t rxid;
127 uint32_t nlp_DID; /* FC D_ID of entry */
128 struct lpfc_vport *vport;
129 struct lpfc_nodelist *ndlp;
130 unsigned long rrq_stop_time;
131};
dea31012005-04-17 16:05:31 -0500132
133/* Defines for nlp_flag (uint32) */
James Smartffc95492010-06-07 15:23:17 -0400134#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
135#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
James Smart7f5f3d02008-02-08 18:50:14 -0500136#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
137#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
138#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
139#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
140#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
141#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
142#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
143#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
144#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
145#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
146#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
147#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
James Smart086a3452012-08-14 14:25:21 -0400148#define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */
James Smart7f5f3d02008-02-08 18:50:14 -0500149#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
dea31012005-04-17 16:05:31 -0500150 ACC */
James Smart7f5f3d02008-02-08 18:50:14 -0500151#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
dea31012005-04-17 16:05:31 -0500152 NPR list */
James Smart7f5f3d02008-02-08 18:50:14 -0500153#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
154#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
James Smart92d7f7b2007-06-17 19:56:38 -0500155#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
James Smart7f5f3d02008-02-08 18:50:14 -0500156#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
James Smart40426292010-12-15 17:58:10 -0500157#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */
dea31012005-04-17 16:05:31 -0500158
James Smarte47c9092008-02-08 18:49:26 -0500159/* ndlp usage management macros */
160#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
161 & NLP_USG_NODE_ACT_BIT) \
162 && \
163 !((ndlp)->nlp_usg_map \
164 & NLP_USG_FREE_ACK_BIT))
165#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
166 |= NLP_USG_NODE_ACT_BIT)
167#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
168 = NLP_USG_NODE_ACT_BIT)
169#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
170 &= ~NLP_USG_NODE_ACT_BIT)
171#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
172 & NLP_USG_IACT_REQ_BIT)
173#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
174 |= NLP_USG_IACT_REQ_BIT)
175#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
176 & NLP_USG_FREE_REQ_BIT)
177#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
178 |= NLP_USG_FREE_REQ_BIT)
179#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
180 & NLP_USG_FREE_ACK_BIT)
181#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
182 |= NLP_USG_FREE_ACK_BIT)
183
dea31012005-04-17 16:05:31 -0500184/* There are 4 different double linked lists nodelist entries can reside on.
185 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
186 * when Link Up discovery or Registered State Change Notification (RSCN)
187 * processing is needed. Each list holds the nodes that require a PLOGI or
188 * ADISC Extended Link Service (ELS) request. These lists keep track of the
189 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
190 * by Link Up) event. The unmapped_list contains all nodes that have
191 * successfully logged into at the Fibre Channel level. The
192 * mapped_list will contain all nodes that are mapped FCP targets.
193 *
194 * The bind list is a list of undiscovered (potentially non-existent) nodes
195 * that we have saved binding information on. This information is used when
196 * nodes transition from the unmapped to the mapped list.
197 */
198
199/* Defines for nlp_state */
200#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
201#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
202#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
203#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
204#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
James Smart086a3452012-08-14 14:25:21 -0400205#define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */
206#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */
207#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */
208#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */
209#define NLP_STE_MAX_STATE 0x9
dea31012005-04-17 16:05:31 -0500210#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
211
212/* For UNUSED_NODE state, the node has just been allocated.
213 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
214 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
215 * and put on the unmapped list. For ADISC processing, the node is taken off
216 * the ADISC list and placed on either the mapped or unmapped list (depending
217 * on its previous state). Once on the unmapped list, a PRLI is issued and the
218 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
219 * changed to PRLI_COMPL. If the completion indicates a mapped
220 * node, the node is taken off the unmapped list. The binding list is checked
221 * for a valid binding, or a binding is automatically assigned. If binding
222 * assignment is unsuccessful, the node is left on the unmapped list. If
223 * binding assignment is successful, the associated binding list entry (if
224 * any) is removed, and the node is placed on the mapped list.
225 */
226/*
227 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
James Smartc01f3202006-08-18 17:47:08 -0400228 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
dea31012005-04-17 16:05:31 -0500229 * expire, all effected nodes will receive a DEVICE_RM event.
230 */
231/*
232 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
233 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
234 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
235 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
236 * we will first process the ADISC list. 32 entries are processed initially and
237 * ADISC is initited for each one. Completions / Events for each node are
238 * funnelled thru the state machine. As each node finishes ADISC processing, it
239 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
240 * waiting, and the ADISC list count is identically 0, then we are done. For
241 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
242 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
243 * list. 32 entries are processed initially and PLOGI is initited for each one.
244 * Completions / Events for each node are funnelled thru the state machine. As
245 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
246 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
247 * identically 0, then we are done. We have now completed discovery / RSCN
248 * handling. Upon completion, ALL nodes should be on either the mapped or
249 * unmapped lists.
250 */
251
252/* Defines for Node List Entry Events that could happen */
253#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
254#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
255#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
256#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
257#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
258#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
259#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
260#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
261#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
262#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
263#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
264#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
265#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
266#define NLP_EVT_MAX_EVENT 0xd
267