/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2007 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ #define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */ #define FC_MAX_NS_RSP 65536 /* max size NameServer rsp */ #define FC_MAXLOOP 126 /* max devices supported on a fc loop */ #define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */ /* This is the protocol dependent definition for a Node List Entry. * This is used by Fibre Channel protocol to support FCP. */ /* worker thread events */ enum lpfc_work_type { LPFC_EVT_ONLINE, LPFC_EVT_OFFLINE_PREP, LPFC_EVT_OFFLINE, LPFC_EVT_WARM_START, LPFC_EVT_KILL, LPFC_EVT_ELS_RETRY, }; /* structure used to queue event to the discovery tasklet */ struct lpfc_work_evt { struct list_head evt_listp; void * evt_arg1; void * evt_arg2; enum lpfc_work_type evt; }; struct lpfc_nodelist { struct list_head nlp_listp; struct lpfc_name nlp_portname; struct lpfc_name nlp_nodename; uint32_t nlp_flag; /* entry flags */ uint32_t nlp_DID; /* FC D_ID of entry */ uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ uint16_t nlp_type; #define NLP_FC_NODE 0x1 /* entry is an FC node */ #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ uint16_t nlp_rpi; uint16_t nlp_state; /* state transition indicator */ uint16_t nlp_prev_state; /* state transition indicator */ uint16_t nlp_xri; /* output exchange id for RPI */ uint16_t nlp_sid; /* scsi id */ #define NLP_NO_SID 0xffff uint16_t nlp_maxframe; /* Max RCV frame size */ uint8_t nlp_class_sup; /* Supported Classes */ uint8_t nlp_retry; /* used for ELS retries */ uint8_t nlp_fcp_info; /* class info, bits 0-3 */ #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ struct fc_rport *rport; /* Corresponding FC transport port structure */ struct lpfc_vport *vport; struct lpfc_work_evt els_retry_evt; unsigned long last_ramp_up_time; /* jiffy of last ramp up */ unsigned long last_q_full_time; /* jiffy of last queue full */ struct kref kref; }; /* Defines for nlp_flag (uint32) */ #define NLP_PLOGI_SND 0x20 /* sent PLOGI request for this entry */ #define NLP_PRLI_SND 0x40 /* sent PRLI request for this entry */ #define NLP_ADISC_SND 0x80 /* sent ADISC request for this entry */ #define NLP_LOGO_SND 0x100 /* sent LOGO request for this entry */ #define NLP_RNID_SND 0x400 /* sent RNID request for this entry */ #define NLP_ELS_SND_MASK 0x7e0 /* sent ELS request for this entry */ #define NLP_DELAY_TMO 0x20000 /* delay timeout is running for node */ #define NLP_NPR_2B_DISC 0x40000 /* node is included in num_disc_nodes */ #define NLP_RCV_PLOGI 0x80000 /* Rcv'ed PLOGI from remote system */ #define NLP_LOGO_ACC 0x100000 /* Process LOGO after ACC completes */ #define NLP_TGT_NO_SCSIID 0x200000 /* good PRLI but no binding for scsid */ #define NLP_ACC_REGLOGIN 0x1000000 /* Issue Reg Login after successful ACC */ #define NLP_NPR_ADISC 0x2000000 /* Issue ADISC when dq'ed from NPR list */ #define NLP_NODEV_REMOVE 0x8000000 /* Defer removal till discovery ends */ /* There are 4 different double linked lists nodelist entries can reside on. * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used * when Link Up discovery or Registered State Change Notification (RSCN) * processing is needed. Each list holds the nodes that require a PLOGI or * ADISC Extended Link Service (ELS) request. These lists keep track of the * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected * by Link Up) event. The unmapped_list contains all nodes that have * successfully logged into at the Fibre Channel level. The * mapped_list will contain all nodes that are mapped FCP targets. * * The bind list is a list of undiscovered (potentially non-existent) nodes * that we have saved binding information on. This information is used when * nodes transition from the unmapped to the mapped list. */ /* Defines for nlp_state */ #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ #define NLP_STE_MAX_STATE 0x8 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ /* For UNUSED_NODE state, the node has just been allocated. * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list * and put on the unmapped list. For ADISC processing, the node is taken off * the ADISC list and placed on either the mapped or unmapped list (depending * on its previous state). Once on the unmapped list, a PRLI is issued and the * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is * changed to PRLI_COMPL. If the completion indicates a mapped * node, the node is taken off the unmapped list. The binding list is checked * for a valid binding, or a binding is automatically assigned. If binding * assignment is unsuccessful, the node is left on the unmapped list. If * binding assignment is successful, the associated binding list entry (if * any) is removed, and the node is placed on the mapped list. */ /* * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers * expire, all effected nodes will receive a DEVICE_RM event. */ /* * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, * we will first process the ADISC list. 32 entries are processed initially and * ADISC is initited for each one. Completions / Events for each node are * funnelled thru the state machine. As each node finishes ADISC processing, it * starts ADISC for any nodes waiting for ADISC processing. If no nodes are * waiting, and the ADISC list count is identically 0, then we are done. For * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI * list. 32 entries are processed initially and PLOGI is initited for each one. * Completions / Events for each node are funnelled thru the state machine. As * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is * identically 0, then we are done. We have now completed discovery / RSCN * handling. Upon completion, ALL nodes should be on either the mapped or * unmapped lists. */ /* Defines for Node List Entry Events that could happen */ #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ #define NLP_EVT_MAX_EVENT 0xd