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 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 /* worker thread events */ 32 enum 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 }; 42 43 /* structure used to queue event to the discovery tasklet */ 44 struct lpfc_work_evt { 45 struct list_head evt_listp; 46 void *evt_arg1; 47 void *evt_arg2; 48 enum lpfc_work_type evt; 49 }; 50 51 struct lpfc_scsi_check_condition_event; 52 struct lpfc_scsi_varqueuedepth_event; 53 struct lpfc_scsi_event_header; 54 struct lpfc_fabric_event_header; 55 struct lpfc_fcprdchkerr_event; 56 57 /* structure used for sending events from fast path */ 58 struct lpfc_fast_path_event { 59 struct lpfc_work_evt work_evt; 60 struct lpfc_vport *vport; 61 union { 62 struct lpfc_scsi_check_condition_event check_cond_evt; 63 struct lpfc_scsi_varqueuedepth_event queue_depth_evt; 64 struct lpfc_scsi_event_header scsi_evt; 65 struct lpfc_fabric_event_header fabric_evt; 66 struct lpfc_fcprdchkerr_event read_check_error; 67 } un; 68 }; 69 70 struct lpfc_nodelist { 71 struct list_head nlp_listp; 72 struct lpfc_name nlp_portname; 73 struct lpfc_name nlp_nodename; 74 uint32_t nlp_flag; /* entry flags */ 75 uint32_t nlp_DID; /* FC D_ID of entry */ 76 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ 77 uint16_t nlp_type; 78 #define NLP_FC_NODE 0x1 /* entry is an FC node */ 79 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ 80 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ 81 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ 82 83 uint16_t nlp_rpi; 84 uint16_t nlp_state; /* state transition indicator */ 85 uint16_t nlp_prev_state; /* state transition indicator */ 86 uint16_t nlp_xri; /* output exchange id for RPI */ 87 uint16_t nlp_sid; /* scsi id */ 88 #define NLP_NO_SID 0xffff 89 uint16_t nlp_maxframe; /* Max RCV frame size */ 90 uint8_t nlp_class_sup; /* Supported Classes */ 91 uint8_t nlp_retry; /* used for ELS retries */ 92 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 93 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 94 95 uint16_t nlp_usg_map; /* ndlp management usage bitmap */ 96 #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */ 97 #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */ 98 #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */ 99 #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */ 100 101 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 102 struct lpfc_hba *phba; 103 struct fc_rport *rport; /* Corresponding FC transport 104 port structure */ 105 struct lpfc_vport *vport; 106 struct lpfc_work_evt els_retry_evt; 107 struct lpfc_work_evt dev_loss_evt; 108 unsigned long last_ramp_up_time; /* jiffy of last ramp up */ 109 unsigned long last_q_full_time; /* jiffy of last queue full */ 110 struct kref kref; 111 atomic_t cmd_pending; 112 uint32_t cmd_qdepth; 113 unsigned long last_change_time; 114 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 115 }; 116 117 /* Defines for nlp_flag (uint32) */ 118 #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ 119 #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ 120 #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ 121 #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ 122 #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ 123 #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ 124 #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ 125 #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ 126 #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ 127 #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ 128 #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ 129 #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ 130 #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful 131 ACC */ 132 #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 133 NPR list */ 134 #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 135 #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 136 #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 137 #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 138 #define NLP_RPI_VALID 0x80000000 /* nlp_rpi is valid */ 139 140 /* ndlp usage management macros */ 141 #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ 142 & NLP_USG_NODE_ACT_BIT) \ 143 && \ 144 !((ndlp)->nlp_usg_map \ 145 & NLP_USG_FREE_ACK_BIT)) 146 #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 147 |= NLP_USG_NODE_ACT_BIT) 148 #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 149 = NLP_USG_NODE_ACT_BIT) 150 #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 151 &= ~NLP_USG_NODE_ACT_BIT) 152 #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 153 & NLP_USG_IACT_REQ_BIT) 154 #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 155 |= NLP_USG_IACT_REQ_BIT) 156 #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 157 & NLP_USG_FREE_REQ_BIT) 158 #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 159 |= NLP_USG_FREE_REQ_BIT) 160 #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 161 & NLP_USG_FREE_ACK_BIT) 162 #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 163 |= NLP_USG_FREE_ACK_BIT) 164 165 /* There are 4 different double linked lists nodelist entries can reside on. 166 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 167 * when Link Up discovery or Registered State Change Notification (RSCN) 168 * processing is needed. Each list holds the nodes that require a PLOGI or 169 * ADISC Extended Link Service (ELS) request. These lists keep track of the 170 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 171 * by Link Up) event. The unmapped_list contains all nodes that have 172 * successfully logged into at the Fibre Channel level. The 173 * mapped_list will contain all nodes that are mapped FCP targets. 174 * 175 * The bind list is a list of undiscovered (potentially non-existent) nodes 176 * that we have saved binding information on. This information is used when 177 * nodes transition from the unmapped to the mapped list. 178 */ 179 180 /* Defines for nlp_state */ 181 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 182 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 183 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 184 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 185 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 186 #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ 187 #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ 188 #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ 189 #define NLP_STE_MAX_STATE 0x8 190 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 191 192 /* For UNUSED_NODE state, the node has just been allocated. 193 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 194 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 195 * and put on the unmapped list. For ADISC processing, the node is taken off 196 * the ADISC list and placed on either the mapped or unmapped list (depending 197 * on its previous state). Once on the unmapped list, a PRLI is issued and the 198 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 199 * changed to PRLI_COMPL. If the completion indicates a mapped 200 * node, the node is taken off the unmapped list. The binding list is checked 201 * for a valid binding, or a binding is automatically assigned. If binding 202 * assignment is unsuccessful, the node is left on the unmapped list. If 203 * binding assignment is successful, the associated binding list entry (if 204 * any) is removed, and the node is placed on the mapped list. 205 */ 206 /* 207 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 208 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 209 * expire, all effected nodes will receive a DEVICE_RM event. 210 */ 211 /* 212 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 213 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 214 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 215 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 216 * we will first process the ADISC list. 32 entries are processed initially and 217 * ADISC is initited for each one. Completions / Events for each node are 218 * funnelled thru the state machine. As each node finishes ADISC processing, it 219 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 220 * waiting, and the ADISC list count is identically 0, then we are done. For 221 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 222 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 223 * list. 32 entries are processed initially and PLOGI is initited for each one. 224 * Completions / Events for each node are funnelled thru the state machine. As 225 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 226 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 227 * identically 0, then we are done. We have now completed discovery / RSCN 228 * handling. Upon completion, ALL nodes should be on either the mapped or 229 * unmapped lists. 230 */ 231 232 /* Defines for Node List Entry Events that could happen */ 233 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 234 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 235 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 236 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 237 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 238 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 239 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 240 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 241 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 242 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 243 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 244 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 245 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 246 #define NLP_EVT_MAX_EVENT 0xd 247 248