1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2013 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 */ 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 LPFC_EVT_RESET_HBA, 42 }; 43 44 /* structure used to queue event to the discovery tasklet */ 45 struct 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 52 struct lpfc_scsi_check_condition_event; 53 struct lpfc_scsi_varqueuedepth_event; 54 struct lpfc_scsi_event_header; 55 struct lpfc_fabric_event_header; 56 struct lpfc_fcprdchkerr_event; 57 58 /* structure used for sending events from fast path */ 59 struct 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) 73 struct lpfc_node_rrqs { 74 unsigned long xri_bitmap[XRI_BITMAP_ULONGS]; 75 }; 76 77 struct 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_add_flag; /* additional flags */ 83 uint32_t nlp_DID; /* FC D_ID of entry */ 84 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ 85 uint16_t nlp_type; 86 #define NLP_FC_NODE 0x1 /* entry is an FC node */ 87 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ 88 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ 89 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ 90 91 uint16_t nlp_rpi; 92 uint16_t nlp_state; /* state transition indicator */ 93 uint16_t nlp_prev_state; /* state transition indicator */ 94 uint16_t nlp_xri; /* output exchange id for RPI */ 95 uint16_t nlp_sid; /* scsi id */ 96 #define NLP_NO_SID 0xffff 97 uint16_t nlp_maxframe; /* Max RCV frame size */ 98 uint8_t nlp_class_sup; /* Supported Classes */ 99 uint8_t nlp_retry; /* used for ELS retries */ 100 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 101 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 102 103 uint16_t nlp_usg_map; /* ndlp management usage bitmap */ 104 #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */ 105 #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */ 106 #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */ 107 #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */ 108 109 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 110 struct lpfc_hba *phba; 111 struct fc_rport *rport; /* Corresponding FC transport 112 port structure */ 113 struct lpfc_vport *vport; 114 struct lpfc_work_evt els_retry_evt; 115 struct lpfc_work_evt dev_loss_evt; 116 struct kref kref; 117 atomic_t cmd_pending; 118 uint32_t cmd_qdepth; 119 unsigned long last_change_time; 120 unsigned long *active_rrqs_xri_bitmap; 121 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 122 }; 123 struct lpfc_node_rrq { 124 struct list_head list; 125 uint16_t xritag; 126 uint16_t send_rrq; 127 uint16_t rxid; 128 uint32_t nlp_DID; /* FC D_ID of entry */ 129 struct lpfc_vport *vport; 130 struct lpfc_nodelist *ndlp; 131 unsigned long rrq_stop_time; 132 }; 133 134 /* Defines for nlp_flag (uint32) */ 135 #define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */ 136 #define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */ 137 #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ 138 #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ 139 #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ 140 #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ 141 #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ 142 #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ 143 #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ 144 #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ 145 #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ 146 #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ 147 #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ 148 #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ 149 #define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */ 150 #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful 151 ACC */ 152 #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 153 NPR list */ 154 #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 155 #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 156 #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 157 #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 158 #define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */ 159 #define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */ 160 161 /* Defines for nlp_add_flag (uint32) */ 162 #define NLP_IN_DEV_LOSS 0x00000001 /* Dev Loss processing in progress */ 163 164 /* ndlp usage management macros */ 165 #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ 166 & NLP_USG_NODE_ACT_BIT) \ 167 && \ 168 !((ndlp)->nlp_usg_map \ 169 & NLP_USG_FREE_ACK_BIT)) 170 #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 171 |= NLP_USG_NODE_ACT_BIT) 172 #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 173 = NLP_USG_NODE_ACT_BIT) 174 #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 175 &= ~NLP_USG_NODE_ACT_BIT) 176 #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 177 & NLP_USG_IACT_REQ_BIT) 178 #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 179 |= NLP_USG_IACT_REQ_BIT) 180 #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 181 & NLP_USG_FREE_REQ_BIT) 182 #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 183 |= NLP_USG_FREE_REQ_BIT) 184 #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 185 & NLP_USG_FREE_ACK_BIT) 186 #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 187 |= NLP_USG_FREE_ACK_BIT) 188 189 /* There are 4 different double linked lists nodelist entries can reside on. 190 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 191 * when Link Up discovery or Registered State Change Notification (RSCN) 192 * processing is needed. Each list holds the nodes that require a PLOGI or 193 * ADISC Extended Link Service (ELS) request. These lists keep track of the 194 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 195 * by Link Up) event. The unmapped_list contains all nodes that have 196 * successfully logged into at the Fibre Channel level. The 197 * mapped_list will contain all nodes that are mapped FCP targets. 198 * 199 * The bind list is a list of undiscovered (potentially non-existent) nodes 200 * that we have saved binding information on. This information is used when 201 * nodes transition from the unmapped to the mapped list. 202 */ 203 204 /* Defines for nlp_state */ 205 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 206 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 207 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 208 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 209 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 210 #define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */ 211 #define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */ 212 #define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */ 213 #define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */ 214 #define NLP_STE_MAX_STATE 0x9 215 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 216 217 /* For UNUSED_NODE state, the node has just been allocated. 218 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 219 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 220 * and put on the unmapped list. For ADISC processing, the node is taken off 221 * the ADISC list and placed on either the mapped or unmapped list (depending 222 * on its previous state). Once on the unmapped list, a PRLI is issued and the 223 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 224 * changed to PRLI_COMPL. If the completion indicates a mapped 225 * node, the node is taken off the unmapped list. The binding list is checked 226 * for a valid binding, or a binding is automatically assigned. If binding 227 * assignment is unsuccessful, the node is left on the unmapped list. If 228 * binding assignment is successful, the associated binding list entry (if 229 * any) is removed, and the node is placed on the mapped list. 230 */ 231 /* 232 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 233 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 234 * expire, all effected nodes will receive a DEVICE_RM event. 235 */ 236 /* 237 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 238 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 239 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 240 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 241 * we will first process the ADISC list. 32 entries are processed initially and 242 * ADISC is initited for each one. Completions / Events for each node are 243 * funnelled thru the state machine. As each node finishes ADISC processing, it 244 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 245 * waiting, and the ADISC list count is identically 0, then we are done. For 246 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 247 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 248 * list. 32 entries are processed initially and PLOGI is initited for each one. 249 * Completions / Events for each node are funnelled thru the state machine. As 250 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 251 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 252 * identically 0, then we are done. We have now completed discovery / RSCN 253 * handling. Upon completion, ALL nodes should be on either the mapped or 254 * unmapped lists. 255 */ 256 257 /* Defines for Node List Entry Events that could happen */ 258 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 259 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 260 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 261 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 262 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 263 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 264 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 265 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 266 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 267 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 268 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 269 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 270 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 271 #define NLP_EVT_MAX_EVENT 0xd 272 273