1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2005 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * * 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 *******************************************************************/ 20 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 */ 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 31 /* structure used to queue event to the discovery tasklet */ 32 struct lpfc_work_evt { 33 struct list_head evt_listp; 34 void * evt_arg1; 35 void * evt_arg2; 36 uint32_t evt; 37 }; 38 39 #define LPFC_EVT_NODEV_TMO 0x1 40 #define LPFC_EVT_ONLINE 0x2 41 #define LPFC_EVT_OFFLINE 0x3 42 #define LPFC_EVT_ELS_RETRY 0x4 43 44 struct lpfc_nodelist { 45 struct list_head nlp_listp; 46 struct lpfc_name nlp_portname; /* port name */ 47 struct lpfc_name nlp_nodename; /* node name */ 48 uint32_t nlp_flag; /* entry flags */ 49 uint32_t nlp_DID; /* FC D_ID of entry */ 50 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ 51 uint16_t nlp_type; 52 #define NLP_FC_NODE 0x1 /* entry is an FC node */ 53 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ 54 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ 55 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ 56 57 uint16_t nlp_rpi; 58 uint16_t nlp_state; /* state transition indicator */ 59 uint16_t nlp_xri; /* output exchange id for RPI */ 60 uint16_t nlp_sid; /* scsi id */ 61 #define NLP_NO_SID 0xffff 62 uint16_t nlp_maxframe; /* Max RCV frame size */ 63 uint8_t nlp_class_sup; /* Supported Classes */ 64 uint8_t nlp_retry; /* used for ELS retries */ 65 uint8_t nlp_disc_refcnt; /* used for DSM */ 66 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 67 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 68 69 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 70 struct timer_list nlp_tmofunc; /* Used for nodev tmo */ 71 struct fc_rport *rport; /* Corresponding FC transport 72 port structure */ 73 struct lpfc_nodelist *nlp_rpi_hash_next; 74 struct lpfc_hba *nlp_phba; 75 struct lpfc_work_evt nodev_timeout_evt; 76 struct lpfc_work_evt els_retry_evt; 77 }; 78 79 /* Defines for nlp_flag (uint32) */ 80 #define NLP_NO_LIST 0x0 /* Indicates immediately free node */ 81 #define NLP_UNUSED_LIST 0x1 /* Flg to indicate node will be freed */ 82 #define NLP_PLOGI_LIST 0x2 /* Flg to indicate sent PLOGI */ 83 #define NLP_ADISC_LIST 0x3 /* Flg to indicate sent ADISC */ 84 #define NLP_REGLOGIN_LIST 0x4 /* Flg to indicate sent REG_LOGIN */ 85 #define NLP_PRLI_LIST 0x5 /* Flg to indicate sent PRLI */ 86 #define NLP_UNMAPPED_LIST 0x6 /* Node is now unmapped */ 87 #define NLP_MAPPED_LIST 0x7 /* Node is now mapped */ 88 #define NLP_NPR_LIST 0x8 /* Node is in NPort Recovery state */ 89 #define NLP_JUST_DQ 0x9 /* just deque ndlp in lpfc_nlp_list */ 90 #define NLP_LIST_MASK 0xf /* mask to see what list node is on */ 91 #define NLP_PLOGI_SND 0x20 /* sent PLOGI request for this entry */ 92 #define NLP_PRLI_SND 0x40 /* sent PRLI request for this entry */ 93 #define NLP_ADISC_SND 0x80 /* sent ADISC request for this entry */ 94 #define NLP_LOGO_SND 0x100 /* sent LOGO request for this entry */ 95 #define NLP_RNID_SND 0x400 /* sent RNID request for this entry */ 96 #define NLP_ELS_SND_MASK 0x7e0 /* sent ELS request for this entry */ 97 #define NLP_NODEV_TMO 0x10000 /* nodev timeout is running for node */ 98 #define NLP_DELAY_TMO 0x20000 /* delay timeout is running for node */ 99 #define NLP_NPR_2B_DISC 0x40000 /* node is included in num_disc_nodes */ 100 #define NLP_RCV_PLOGI 0x80000 /* Rcv'ed PLOGI from remote system */ 101 #define NLP_LOGO_ACC 0x100000 /* Process LOGO after ACC completes */ 102 #define NLP_TGT_NO_SCSIID 0x200000 /* good PRLI but no binding for scsid */ 103 #define NLP_ACC_REGLOGIN 0x1000000 /* Issue Reg Login after successful 104 ACC */ 105 #define NLP_NPR_ADISC 0x2000000 /* Issue ADISC when dq'ed from 106 NPR list */ 107 #define NLP_DELAY_REMOVE 0x4000000 /* Defer removal till end of DSM */ 108 109 /* Defines for list searchs */ 110 #define NLP_SEARCH_MAPPED 0x1 /* search mapped */ 111 #define NLP_SEARCH_UNMAPPED 0x2 /* search unmapped */ 112 #define NLP_SEARCH_PLOGI 0x4 /* search plogi */ 113 #define NLP_SEARCH_ADISC 0x8 /* search adisc */ 114 #define NLP_SEARCH_REGLOGIN 0x10 /* search reglogin */ 115 #define NLP_SEARCH_PRLI 0x20 /* search prli */ 116 #define NLP_SEARCH_NPR 0x40 /* search npr */ 117 #define NLP_SEARCH_UNUSED 0x80 /* search mapped */ 118 #define NLP_SEARCH_ALL 0xff /* search all lists */ 119 120 /* There are 4 different double linked lists nodelist entries can reside on. 121 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 122 * when Link Up discovery or Registered State Change Notification (RSCN) 123 * processing is needed. Each list holds the nodes that require a PLOGI or 124 * ADISC Extended Link Service (ELS) request. These lists keep track of the 125 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 126 * by Link Up) event. The unmapped_list contains all nodes that have 127 * successfully logged into at the Fibre Channel level. The 128 * mapped_list will contain all nodes that are mapped FCP targets. 129 * 130 * The bind list is a list of undiscovered (potentially non-existent) nodes 131 * that we have saved binding information on. This information is used when 132 * nodes transition from the unmapped to the mapped list. 133 */ 134 135 /* Defines for nlp_state */ 136 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 137 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 138 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 139 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 140 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 141 #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ 142 #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ 143 #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ 144 #define NLP_STE_MAX_STATE 0x8 145 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 146 147 /* For UNUSED_NODE state, the node has just been allocated. 148 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 149 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 150 * and put on the unmapped list. For ADISC processing, the node is taken off 151 * the ADISC list and placed on either the mapped or unmapped list (depending 152 * on its previous state). Once on the unmapped list, a PRLI is issued and the 153 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 154 * changed to PRLI_COMPL. If the completion indicates a mapped 155 * node, the node is taken off the unmapped list. The binding list is checked 156 * for a valid binding, or a binding is automatically assigned. If binding 157 * assignment is unsuccessful, the node is left on the unmapped list. If 158 * binding assignment is successful, the associated binding list entry (if 159 * any) is removed, and the node is placed on the mapped list. 160 */ 161 /* 162 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 163 * lists will receive a DEVICE_RECOVERY event. If the linkdown or nodev timers 164 * expire, all effected nodes will receive a DEVICE_RM event. 165 */ 166 /* 167 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 168 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 169 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 170 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 171 * we will first process the ADISC list. 32 entries are processed initially and 172 * ADISC is initited for each one. Completions / Events for each node are 173 * funnelled thru the state machine. As each node finishes ADISC processing, it 174 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 175 * waiting, and the ADISC list count is identically 0, then we are done. For 176 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 177 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 178 * list. 32 entries are processed initially and PLOGI is initited for each one. 179 * Completions / Events for each node are funnelled thru the state machine. As 180 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 181 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 182 * identically 0, then we are done. We have now completed discovery / RSCN 183 * handling. Upon completion, ALL nodes should be on either the mapped or 184 * unmapped lists. 185 */ 186 187 /* Defines for Node List Entry Events that could happen */ 188 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 189 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 190 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 191 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 192 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 193 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 194 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 195 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 196 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 197 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 198 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 199 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 200 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 201 #define NLP_EVT_MAX_EVENT 0xd 202 203