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 71#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 77struct lpfc_nodelist { 78 struct list_head nlp_listp; 79 struct lpfc_name nlp_portname; 80 struct lpfc_name nlp_nodename; 81 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 */ 92 uint16_t nlp_prev_state; /* state transition indicator */ 93 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 */ 99 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 100#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 101 102 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 */ 107 108 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 109 struct lpfc_hba *phba; 110 struct fc_rport *rport; /* Corresponding FC transport 111 port structure */ 112 struct lpfc_vport *vport; 113 struct lpfc_work_evt els_retry_evt; 114 struct lpfc_work_evt dev_loss_evt; 115 struct kref kref; 116 atomic_t cmd_pending; 117 uint32_t cmd_qdepth; 118 unsigned long last_change_time; 119 struct lpfc_node_rrqs active_rrqs; 120 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 121}; 122struct 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}; 132 133/* Defines for nlp_flag (uint32) */ 134#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */ 135#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */ 136#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 */ 148#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful 149 ACC */ 150#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 151 NPR list */ 152#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 153#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 154#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 155#define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 156#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */ 157 158/* ndlp usage management macros */ 159#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ 160 & NLP_USG_NODE_ACT_BIT) \ 161 && \ 162 !((ndlp)->nlp_usg_map \ 163 & NLP_USG_FREE_ACK_BIT)) 164#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 165 |= NLP_USG_NODE_ACT_BIT) 166#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 167 = NLP_USG_NODE_ACT_BIT) 168#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 169 &= ~NLP_USG_NODE_ACT_BIT) 170#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 171 & NLP_USG_IACT_REQ_BIT) 172#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 173 |= NLP_USG_IACT_REQ_BIT) 174#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 175 & NLP_USG_FREE_REQ_BIT) 176#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 177 |= NLP_USG_FREE_REQ_BIT) 178#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 179 & NLP_USG_FREE_ACK_BIT) 180#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 181 |= NLP_USG_FREE_ACK_BIT) 182 183/* There are 4 different double linked lists nodelist entries can reside on. 184 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 185 * when Link Up discovery or Registered State Change Notification (RSCN) 186 * processing is needed. Each list holds the nodes that require a PLOGI or 187 * ADISC Extended Link Service (ELS) request. These lists keep track of the 188 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 189 * by Link Up) event. The unmapped_list contains all nodes that have 190 * successfully logged into at the Fibre Channel level. The 191 * mapped_list will contain all nodes that are mapped FCP targets. 192 * 193 * The bind list is a list of undiscovered (potentially non-existent) nodes 194 * that we have saved binding information on. This information is used when 195 * nodes transition from the unmapped to the mapped list. 196 */ 197 198/* Defines for nlp_state */ 199#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 200#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 201#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 202#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 203#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 204#define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ 205#define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ 206#define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ 207#define NLP_STE_MAX_STATE 0x8 208#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 209 210/* For UNUSED_NODE state, the node has just been allocated. 211 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 212 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 213 * and put on the unmapped list. For ADISC processing, the node is taken off 214 * the ADISC list and placed on either the mapped or unmapped list (depending 215 * on its previous state). Once on the unmapped list, a PRLI is issued and the 216 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 217 * changed to PRLI_COMPL. If the completion indicates a mapped 218 * node, the node is taken off the unmapped list. The binding list is checked 219 * for a valid binding, or a binding is automatically assigned. If binding 220 * assignment is unsuccessful, the node is left on the unmapped list. If 221 * binding assignment is successful, the associated binding list entry (if 222 * any) is removed, and the node is placed on the mapped list. 223 */ 224/* 225 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 226 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 227 * expire, all effected nodes will receive a DEVICE_RM event. 228 */ 229/* 230 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 231 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 232 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 233 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 234 * we will first process the ADISC list. 32 entries are processed initially and 235 * ADISC is initited for each one. Completions / Events for each node are 236 * funnelled thru the state machine. As each node finishes ADISC processing, it 237 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 238 * waiting, and the ADISC list count is identically 0, then we are done. For 239 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 240 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 241 * list. 32 entries are processed initially and PLOGI is initited for each one. 242 * Completions / Events for each node are funnelled thru the state machine. As 243 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 244 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 245 * identically 0, then we are done. We have now completed discovery / RSCN 246 * handling. Upon completion, ALL nodes should be on either the mapped or 247 * unmapped lists. 248 */ 249 250/* Defines for Node List Entry Events that could happen */ 251#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 252#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 253#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 254#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 255#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 256#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 257#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 258#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 259#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 260#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 261#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 262#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 263#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 264#define NLP_EVT_MAX_EVENT 0xd 265 266