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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_disc.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_disc.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_disc.h b/drivers/scsi/lpfc/lpfc_disc.h new file mode 100644 index 000000000000..adccc99510d5 --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_disc.h @@ -0,0 +1,206 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Enterprise Fibre Channel Host Bus Adapters. * + * Refer to the README file included with this package for * + * driver version and adapter support. * + * Copyright (C) 2004 Emulex Corporation. * + * www.emulex.com * + * * + * This program is free software; you can redistribute it and/or * + * modify it under the terms of the GNU General Public License * + * as published by the Free Software Foundation; either version 2 * + * of the License, or (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details, a copy of which * + * can be found in the file COPYING included with this package. * + *******************************************************************/ + +/* + * $Id: lpfc_disc.h 1.61 2005/04/07 08:46:52EDT sf_support Exp $ + */ + +#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. + */ + +/* structure used to queue event to the discovery tasklet */ +struct lpfc_work_evt { + struct list_head evt_listp; + void * evt_arg1; + void * evt_arg2; + uint32_t evt; +}; + +#define LPFC_EVT_NODEV_TMO 0x1 +#define LPFC_EVT_ONLINE 0x2 +#define LPFC_EVT_OFFLINE 0x3 +#define LPFC_EVT_ELS_RETRY 0x4 + +struct lpfc_nodelist { + struct list_head nlp_listp; + struct lpfc_name nlp_portname; /* port name */ + struct lpfc_name nlp_nodename; /* node name */ + 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_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_disc_refcnt; /* used for DSM */ + 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 timer_list nlp_tmofunc; /* Used for nodev tmo */ + struct fc_rport *rport; /* Corresponding FC transport + port structure */ + struct lpfc_nodelist *nlp_rpi_hash_next; + struct lpfc_hba *nlp_phba; + struct lpfc_work_evt nodev_timeout_evt; + struct lpfc_work_evt els_retry_evt; +}; + +/* Defines for nlp_flag (uint32) */ +#define NLP_NO_LIST 0x0 /* Indicates immediately free node */ +#define NLP_UNUSED_LIST 0x1 /* Flg to indicate node will be freed */ +#define NLP_PLOGI_LIST 0x2 /* Flg to indicate sent PLOGI */ +#define NLP_ADISC_LIST 0x3 /* Flg to indicate sent ADISC */ +#define NLP_REGLOGIN_LIST 0x4 /* Flg to indicate sent REG_LOGIN */ +#define NLP_PRLI_LIST 0x5 /* Flg to indicate sent PRLI */ +#define NLP_UNMAPPED_LIST 0x6 /* Node is now unmapped */ +#define NLP_MAPPED_LIST 0x7 /* Node is now mapped */ +#define NLP_NPR_LIST 0x8 /* Node is in NPort Recovery state */ +#define NLP_JUST_DQ 0x9 /* just deque ndlp in lpfc_nlp_list */ +#define NLP_LIST_MASK 0xf /* mask to see what list node is on */ +#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_NODEV_TMO 0x10000 /* nodev timeout is running for node */ +#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_DELAY_REMOVE 0x4000000 /* Defer removal till end of DSM */ + +/* Defines for list searchs */ +#define NLP_SEARCH_MAPPED 0x1 /* search mapped */ +#define NLP_SEARCH_UNMAPPED 0x2 /* search unmapped */ +#define NLP_SEARCH_PLOGI 0x4 /* search plogi */ +#define NLP_SEARCH_ADISC 0x8 /* search adisc */ +#define NLP_SEARCH_REGLOGIN 0x10 /* search reglogin */ +#define NLP_SEARCH_PRLI 0x20 /* search prli */ +#define NLP_SEARCH_NPR 0x40 /* search npr */ +#define NLP_SEARCH_UNUSED 0x80 /* search mapped */ +#define NLP_SEARCH_ALL 0xff /* search all lists */ + +/* 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 nodev 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 + |