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1/*******************************************************************2 * This file is part of the Emulex Linux Device Driver for *3 * Fibre Channel Host Bus Adapters. *4 * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *6 * Copyright (C) 2004-2013 Emulex. All rights reserved. *7 * EMULEX and SLI are trademarks of Emulex. *8 * www.broadcom.com *9 * *10 * This program is free software; you can redistribute it and/or *11 * modify it under the terms of version 2 of the GNU General *12 * Public License as published by the Free Software Foundation. *13 * This program is distributed in the hope that it will be useful. *14 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *15 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *16 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *17 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *18 * TO BE LEGALLY INVALID. See the GNU General Public License for *19 * more details, a copy of which can be found in the file COPYING *20 * included with this package. *21 *******************************************************************/22 23#define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */24#define FC_MAX_NS_RSP 64512 /* max size NameServer rsp */25#define FC_MAXLOOP 126 /* max devices supported on a fc loop */26#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */27 28 29/* This is the protocol dependent definition for a Node List Entry.30 * This is used by Fibre Channel protocol to support FCP.31 */32 33/* worker thread events */34enum lpfc_work_type {35 LPFC_EVT_ONLINE,36 LPFC_EVT_OFFLINE_PREP,37 LPFC_EVT_OFFLINE,38 LPFC_EVT_WARM_START,39 LPFC_EVT_KILL,40 LPFC_EVT_ELS_RETRY,41 LPFC_EVT_DEV_LOSS,42 LPFC_EVT_FASTPATH_MGMT_EVT,43 LPFC_EVT_RESET_HBA,44 LPFC_EVT_RECOVER_PORT45};46 47/* structure used to queue event to the discovery tasklet */48struct lpfc_work_evt {49 struct list_head evt_listp;50 void *evt_arg1;51 void *evt_arg2;52 enum lpfc_work_type evt;53};54 55struct lpfc_scsi_check_condition_event;56struct lpfc_scsi_varqueuedepth_event;57struct lpfc_scsi_event_header;58struct lpfc_fabric_event_header;59struct lpfc_fcprdchkerr_event;60 61/* structure used for sending events from fast path */62struct lpfc_fast_path_event {63 struct lpfc_work_evt work_evt;64 struct lpfc_vport *vport;65 union {66 struct lpfc_scsi_check_condition_event check_cond_evt;67 struct lpfc_scsi_varqueuedepth_event queue_depth_evt;68 struct lpfc_scsi_event_header scsi_evt;69 struct lpfc_fabric_event_header fabric_evt;70 struct lpfc_fcprdchkerr_event read_check_error;71 } un;72};73 74#define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */75#define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)76struct lpfc_node_rrqs {77 unsigned long xri_bitmap[XRI_BITMAP_ULONGS];78};79 80enum lpfc_fc4_xpt_flags {81 NLP_XPT_REGD = 0x1,82 SCSI_XPT_REGD = 0x2,83 NVME_XPT_REGD = 0x4,84 NVME_XPT_UNREG_WAIT = 0x8,85 NLP_XPT_HAS_HH = 0x1086};87 88enum lpfc_nlp_save_flags {89 /* devloss occurred during recovery */90 NLP_IN_RECOV_POST_DEV_LOSS = 0x1,91 /* wait for outstanding LOGO to cmpl */92 NLP_WAIT_FOR_LOGO = 0x2,93 /* wait for outstanding DA_ID to finish */94 NLP_WAIT_FOR_DA_ID = 0x495};96 97struct lpfc_nodelist {98 struct list_head nlp_listp;99 struct serv_parm fc_sparam; /* buffer for service params */100 struct lpfc_name nlp_portname;101 struct lpfc_name nlp_nodename;102 103 spinlock_t lock; /* Node management lock */104 105 uint32_t nlp_flag; /* entry flags */106 uint32_t nlp_DID; /* FC D_ID of entry */107 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */108 uint16_t nlp_type;109#define NLP_FC_NODE 0x1 /* entry is an FC node */110#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */111#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */112#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */113#define NLP_NVME_TARGET 0x20 /* entry is a NVME Target */114#define NLP_NVME_INITIATOR 0x40 /* entry is a NVME Initiator */115#define NLP_NVME_DISCOVERY 0x80 /* entry has NVME disc srvc */116 117 uint16_t nlp_fc4_type; /* FC types node supports. */118 /* Assigned from GID_FF, only119 * FCP (0x8) and NVME (0x28)120 * supported.121 */122#define NLP_FC4_NONE 0x0123#define NLP_FC4_FCP 0x1 /* FC4 Type FCP (value x8)) */124#define NLP_FC4_NVME 0x2 /* FC4 TYPE NVME (value x28) */125 126 uint16_t nlp_rpi;127 uint16_t nlp_state; /* state transition indicator */128 uint16_t nlp_prev_state; /* state transition indicator */129 uint16_t nlp_xri; /* output exchange id for RPI */130 uint16_t nlp_sid; /* scsi id */131#define NLP_NO_SID 0xffff132 uint16_t nlp_maxframe; /* Max RCV frame size */133 uint8_t nlp_class_sup; /* Supported Classes */134 uint8_t nlp_retry; /* used for ELS retries */135 uint8_t nlp_fcp_info; /* class info, bits 0-3 */136#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */137 u8 nlp_nvme_info; /* NVME NSLER Support */138 uint8_t vmid_support; /* destination VMID support */139#define NLP_NVME_NSLER 0x1 /* NVME NSLER device */140 141 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */142 struct lpfc_hba *phba;143 struct fc_rport *rport; /* scsi_transport_fc port structure */144 struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */145 struct lpfc_vport *vport;146 struct lpfc_work_evt els_retry_evt;147 struct lpfc_work_evt dev_loss_evt;148 struct lpfc_work_evt recovery_evt;149 struct kref kref;150 atomic_t cmd_pending;151 uint32_t cmd_qdepth;152 unsigned long last_change_time;153 unsigned long *active_rrqs_xri_bitmap;154 uint32_t fc4_prli_sent;155 156 /* flags to keep ndlp alive until special conditions are met */157 enum lpfc_nlp_save_flags save_flags;158 159 enum lpfc_fc4_xpt_flags fc4_xpt_flags;160 161 uint32_t nvme_fb_size; /* NVME target's supported byte cnt */162#define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */163 uint32_t nlp_defer_did;164 165 /* These wait objects are NPIV specific. These IOs must complete166 * synchronously.167 */168 wait_queue_head_t *logo_waitq;169 wait_queue_head_t *da_id_waitq;170};171 172struct lpfc_node_rrq {173 struct list_head list;174 uint16_t xritag;175 uint16_t send_rrq;176 uint16_t rxid;177 uint32_t nlp_DID; /* FC D_ID of entry */178 struct lpfc_vport *vport;179 unsigned long rrq_stop_time;180};181 182#define lpfc_ndlp_check_qdepth(phba, ndlp) \183 (ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri)184 185/* Defines for nlp_flag (uint32) */186#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */187#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */188#define NLP_RELEASE_RPI 0x00000004 /* Release RPI to free pool */189#define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */190#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */191#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */192#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */193#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */194#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */195#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */196#define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */197#define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */198#define NLP_DROPPED 0x00010000 /* Init ref count has been dropped */199#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */200#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */201#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */202#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */203#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */204#define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */205#define NLP_IN_DEV_LOSS 0x00800000 /* devloss in progress */206#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful207 ACC */208#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from209 NPR list */210#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */211#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */212#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */213#define NLP_SC_REQ 0x20000000 /* Target requires authentication */214#define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */215#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */216 217/* There are 4 different double linked lists nodelist entries can reside on.218 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used219 * when Link Up discovery or Registered State Change Notification (RSCN)220 * processing is needed. Each list holds the nodes that require a PLOGI or221 * ADISC Extended Link Service (ELS) request. These lists keep track of the222 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected223 * by Link Up) event. The unmapped_list contains all nodes that have224 * successfully logged into at the Fibre Channel level. The225 * mapped_list will contain all nodes that are mapped FCP targets.226 *227 * The bind list is a list of undiscovered (potentially non-existent) nodes228 * that we have saved binding information on. This information is used when229 * nodes transition from the unmapped to the mapped list.230 */231 232/* Defines for nlp_state */233#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */234#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */235#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */236#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */237#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */238#define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */239#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */240#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */241#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */242#define NLP_STE_MAX_STATE 0x9243#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */244 245/* For UNUSED_NODE state, the node has just been allocated.246 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on247 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list248 * and put on the unmapped list. For ADISC processing, the node is taken off249 * the ADISC list and placed on either the mapped or unmapped list (depending250 * on its previous state). Once on the unmapped list, a PRLI is issued and the251 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is252 * changed to PRLI_COMPL. If the completion indicates a mapped253 * node, the node is taken off the unmapped list. The binding list is checked254 * for a valid binding, or a binding is automatically assigned. If binding255 * assignment is unsuccessful, the node is left on the unmapped list. If256 * binding assignment is successful, the associated binding list entry (if257 * any) is removed, and the node is placed on the mapped list.258 */259/*260 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped261 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers262 * expire, all effected nodes will receive a DEVICE_RM event.263 */264/*265 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists266 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap267 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /268 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,269 * we will first process the ADISC list. 32 entries are processed initially and270 * ADISC is initited for each one. Completions / Events for each node are271 * funnelled thru the state machine. As each node finishes ADISC processing, it272 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are273 * waiting, and the ADISC list count is identically 0, then we are done. For274 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we275 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI276 * list. 32 entries are processed initially and PLOGI is initited for each one.277 * Completions / Events for each node are funnelled thru the state machine. As278 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting279 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is280 * identically 0, then we are done. We have now completed discovery / RSCN281 * handling. Upon completion, ALL nodes should be on either the mapped or282 * unmapped lists.283 */284 285/* Defines for Node List Entry Events that could happen */286#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */287#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */288#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */289#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */290#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */291#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */292#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */293#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */294#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */295#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */296#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */297#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */298#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */299#define NLP_EVT_MAX_EVENT 0xd300#define NLP_EVT_NOTHING_PENDING 0xff301