1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2008 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 64512 /* 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/* worker thread events */ 32enum lpfc_work_type { 33 LPFC_EVT_ONLINE, 34 LPFC_EVT_OFFLINE_PREP, 35 LPFC_EVT_OFFLINE, 36 LPFC_EVT_WARM_START, 37 LPFC_EVT_KILL, 38 LPFC_EVT_ELS_RETRY, 39 LPFC_EVT_DEV_LOSS, 40 LPFC_EVT_FASTPATH_MGMT_EVT, 41 LPFC_EVT_RESET_HBA, 42}; 43 44/* structure used to queue event to the discovery tasklet */ 45struct lpfc_work_evt { 46 struct list_head evt_listp; 47 void *evt_arg1; 48 void *evt_arg2; 49 enum lpfc_work_type evt; 50}; 51 52struct 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}; 70 71struct lpfc_nodelist { 72 struct list_head nlp_listp; 73 struct lpfc_name nlp_portname; 74 struct lpfc_name nlp_nodename; 75 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 */ 86 uint16_t nlp_prev_state; /* state transition indicator */ 87 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 */ 93 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 94#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 95 96 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 */ 101 102 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 103 struct lpfc_hba *phba; 104 struct fc_rport *rport; /* Corresponding FC transport 105 port structure */ 106 struct lpfc_vport *vport; 107 struct lpfc_work_evt els_retry_evt; 108 struct lpfc_work_evt dev_loss_evt; 109 struct kref kref; 110 atomic_t cmd_pending; 111 uint32_t cmd_qdepth; 112 unsigned long last_change_time; 113 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 114}; 115 116/* Defines for nlp_flag (uint32) */ 117#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */ 118#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */ 119#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 132 ACC */ 133#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 134 NPR list */ 135#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 136#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 137#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 138#define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 139#define NLP_RPI_VALID 0x80000000 /* nlp_rpi is valid */ 140 141/* 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) 165 166/* 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 209 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 210 * 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