OSCL-LXR linux-6.0.1/​drivers/​scsi/​lpfc/​lpfc_disc.h	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
  * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
  * Copyright (C) 2004-2013 Emulex.  All rights reserved.           *
  * EMULEX and SLI are trademarks of Emulex.                        *
  * www.broadcom.com                                                *
  *                                                                 *
  * This program is free software; you can redistribute it and/or   *
  * modify it under the terms of version 2 of the GNU General       *
  * Public License as published by the Free Software Foundation.    *
  * This program is distributed in the hope that it will be useful. *
  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  * more details, a copy of which can be found in the file COPYING  *
  * included with this package.                                     *
  *******************************************************************/
 
 #define FC_MAX_HOLD_RSCN     32       /* max number of deferred RSCNs */
 #define FC_MAX_NS_RSP        64512    /* max size NameServer rsp */
 #define FC_MAXLOOP           126      /* max devices supported on a fc loop */
 #define LPFC_DISC_FLOGI_TMO  10       /* Discovery FLOGI ratov */
 
 
 /* This is the protocol dependent definition for a Node List Entry.
  * This is used by Fibre Channel protocol to support FCP.
  */
 
 /* worker thread events */
 enum lpfc_work_type {
     LPFC_EVT_ONLINE,
     LPFC_EVT_OFFLINE_PREP,
     LPFC_EVT_OFFLINE,
     LPFC_EVT_WARM_START,
     LPFC_EVT_KILL,
     LPFC_EVT_ELS_RETRY,
     LPFC_EVT_DEV_LOSS,
     LPFC_EVT_FASTPATH_MGMT_EVT,
     LPFC_EVT_RESET_HBA,
     LPFC_EVT_RECOVER_PORT
 };
 
 /* structure used to queue event to the discovery tasklet */
 struct lpfc_work_evt {
     struct list_head      evt_listp;
     void                 *evt_arg1;
     void                 *evt_arg2;
     enum lpfc_work_type   evt;
 };
 
 struct lpfc_scsi_check_condition_event;
 struct lpfc_scsi_varqueuedepth_event;
 struct lpfc_scsi_event_header;
 struct lpfc_fabric_event_header;
 struct lpfc_fcprdchkerr_event;
 
 /* structure used for sending events from fast path */
 struct lpfc_fast_path_event {
     struct lpfc_work_evt work_evt;
     struct lpfc_vport     *vport;
     union {
         struct lpfc_scsi_check_condition_event check_cond_evt;
         struct lpfc_scsi_varqueuedepth_event queue_depth_evt;
         struct lpfc_scsi_event_header scsi_evt;
         struct lpfc_fabric_event_header fabric_evt;
         struct lpfc_fcprdchkerr_event read_check_error;
     } un;
 };
 
 #define LPFC_SLI4_MAX_XRI   1024    /* Used to make the ndlp's xri_bitmap */
 #define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)
 struct lpfc_node_rrqs {
     unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
 };
 
 enum lpfc_fc4_xpt_flags {
     NLP_XPT_REGD        = 0x1,
     SCSI_XPT_REGD       = 0x2,
     NVME_XPT_REGD       = 0x4,
     NVME_XPT_UNREG_WAIT = 0x8,
     NLP_XPT_HAS_HH      = 0x10
 };
 
 enum lpfc_nlp_save_flags {
     /* devloss occurred during recovery */
     NLP_IN_RECOV_POST_DEV_LOSS  = 0x1,
     /* wait for outstanding LOGO to cmpl */
     NLP_WAIT_FOR_LOGO       = 0x2,
 };
 
 struct lpfc_nodelist {
     struct list_head nlp_listp;
     struct serv_parm fc_sparam;     /* buffer for service params */
     struct lpfc_name nlp_portname;
     struct lpfc_name nlp_nodename;
 
     spinlock_t  lock;           /* Node management lock */
 
     uint32_t         nlp_flag;      /* entry flags */
     uint32_t         nlp_DID;       /* FC D_ID of entry */
     uint32_t         nlp_last_elscmd;   /* Last ELS cmd sent */
     uint16_t         nlp_type;
 #define NLP_FC_NODE        0x1          /* entry is an FC node */
 #define NLP_FABRIC         0x4          /* entry rep a Fabric entity */
 #define NLP_FCP_TARGET     0x8          /* entry is an FCP target */
 #define NLP_FCP_INITIATOR  0x10         /* entry is an FCP Initiator */
 #define NLP_NVME_TARGET    0x20         /* entry is a NVME Target */
 #define NLP_NVME_INITIATOR 0x40         /* entry is a NVME Initiator */
 #define NLP_NVME_DISCOVERY 0x80                 /* entry has NVME disc srvc */
 
     uint16_t    nlp_fc4_type;       /* FC types node supports. */
                         /* Assigned from GID_FF, only
                          * FCP (0x8) and NVME (0x28)
                          * supported.
                          */
 #define NLP_FC4_NONE    0x0
 #define NLP_FC4_FCP 0x1         /* FC4 Type FCP (value x8)) */
 #define NLP_FC4_NVME    0x2         /* FC4 TYPE NVME (value x28) */
 
     uint16_t        nlp_rpi;
     uint16_t        nlp_state;      /* state transition indicator */
     uint16_t        nlp_prev_state;     /* state transition indicator */
     uint16_t        nlp_xri;        /* output exchange id for RPI */
     uint16_t        nlp_sid;        /* scsi id */
 #define NLP_NO_SID      0xffff
     uint16_t    nlp_maxframe;       /* Max RCV frame size */
     uint8_t     nlp_class_sup;      /* Supported Classes */
     uint8_t         nlp_retry;      /* used for ELS retries */
     uint8_t         nlp_fcp_info;           /* class info, bits 0-3 */
 #define NLP_FCP_2_DEVICE   0x10         /* FCP-2 device */
     u8      nlp_nvme_info;          /* NVME NSLER Support */
     uint8_t     vmid_support;       /* destination VMID support */
 #define NLP_NVME_NSLER     0x1          /* NVME NSLER device */
 
     struct timer_list   nlp_delayfunc;  /* Used for delayed ELS cmds */
     struct lpfc_hba *phba;
     struct fc_rport *rport;     /* scsi_transport_fc port structure */
     struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */
     struct lpfc_vport *vport;
     struct lpfc_work_evt els_retry_evt;
     struct lpfc_work_evt dev_loss_evt;
     struct lpfc_work_evt recovery_evt;
     struct kref     kref;
     atomic_t cmd_pending;
     uint32_t cmd_qdepth;
     unsigned long last_change_time;
     unsigned long *active_rrqs_xri_bitmap;
     struct lpfc_scsicmd_bkt *lat_data;  /* Latency data */
     uint32_t fc4_prli_sent;
 
     /* flags to keep ndlp alive until special conditions are met */
     enum lpfc_nlp_save_flags save_flags;
 
     enum lpfc_fc4_xpt_flags fc4_xpt_flags;
 
     uint32_t nvme_fb_size; /* NVME target's supported byte cnt */
 #define NVME_FB_BIT_SHIFT 9    /* PRLI Rsp first burst in 512B units. */
     uint32_t nlp_defer_did;
     wait_queue_head_t *logo_waitq;
 };
 
 struct lpfc_node_rrq {
     struct list_head list;
     uint16_t xritag;
     uint16_t send_rrq;
     uint16_t rxid;
     uint32_t         nlp_DID;       /* FC D_ID of entry */
     struct lpfc_vport *vport;
     unsigned long rrq_stop_time;
 };
 
 #define lpfc_ndlp_check_qdepth(phba, ndlp) \
     (ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri)
 
 /* Defines for nlp_flag (uint32) */
 #define NLP_IGNR_REG_CMPL  0x00000001 /* Rcvd rscn before we cmpl reg login */
 #define NLP_REG_LOGIN_SEND 0x00000002   /* sent reglogin to adapter */
 #define NLP_RELEASE_RPI    0x00000004   /* Release RPI to free pool */
 #define NLP_SUPPRESS_RSP   0x00000010   /* Remote NPort supports suppress rsp */
 #define NLP_PLOGI_SND      0x00000020   /* sent PLOGI request for this entry */
 #define NLP_PRLI_SND       0x00000040   /* sent PRLI request for this entry */
 #define NLP_ADISC_SND      0x00000080   /* sent ADISC request for this entry */
 #define NLP_LOGO_SND       0x00000100   /* sent LOGO request for this entry */
 #define NLP_RNID_SND       0x00000400   /* sent RNID request for this entry */
 #define NLP_ELS_SND_MASK   0x000007e0   /* sent ELS request for this entry */
 #define NLP_NVMET_RECOV    0x00001000   /* NVMET auditing node for recovery. */
 #define NLP_FCP_PRLI_RJT   0x00002000   /* Rport does not support FCP PRLI. */
 #define NLP_UNREG_INP      0x00008000   /* UNREG_RPI cmd is in progress */
 #define NLP_DROPPED        0x00010000   /* Init ref count has been dropped */
 #define NLP_DELAY_TMO      0x00020000   /* delay timeout is running for node */
 #define NLP_NPR_2B_DISC    0x00040000   /* node is included in num_disc_nodes */
 #define NLP_RCV_PLOGI      0x00080000   /* Rcv'ed PLOGI from remote system */
 #define NLP_LOGO_ACC       0x00100000   /* Process LOGO after ACC completes */
 #define NLP_TGT_NO_SCSIID  0x00200000   /* good PRLI but no binding for scsid */
 #define NLP_ISSUE_LOGO     0x00400000   /* waiting to issue a LOGO */
 #define NLP_IN_DEV_LOSS    0x00800000   /* devloss in progress */
 #define NLP_ACC_REGLOGIN   0x01000000   /* Issue Reg Login after successful
                        ACC */
 #define NLP_NPR_ADISC      0x02000000   /* Issue ADISC when dq'ed from
                        NPR list */
 #define NLP_RM_DFLT_RPI    0x04000000   /* need to remove leftover dflt RPI */
 #define NLP_NODEV_REMOVE   0x08000000   /* Defer removal till discovery ends */
 #define NLP_TARGET_REMOVE  0x10000000   /* Target remove in process */
 #define NLP_SC_REQ         0x20000000   /* Target requires authentication */
 #define NLP_FIRSTBURST     0x40000000   /* Target supports FirstBurst */
 #define NLP_RPI_REGISTERED 0x80000000   /* nlp_rpi is valid */
 
 /* There are 4 different double linked lists nodelist entries can reside on.
  * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
  * when Link Up discovery or Registered State Change Notification (RSCN)
  * processing is needed.  Each list holds the nodes that require a PLOGI or
  * ADISC Extended Link Service (ELS) request.  These lists keep track of the
  * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
  * by Link Up) event.  The unmapped_list contains all nodes that have
  * successfully logged into at the Fibre Channel level.  The
  * mapped_list will contain all nodes that are mapped FCP targets.
  *
  * The bind list is a list of undiscovered (potentially non-existent) nodes
  * that we have saved binding information on. This information is used when
  * nodes transition from the unmapped to the mapped list.
  */
 
 /* Defines for nlp_state */
 #define NLP_STE_UNUSED_NODE       0x0   /* node is just allocated */
 #define NLP_STE_PLOGI_ISSUE       0x1   /* PLOGI was sent to NL_PORT */
 #define NLP_STE_ADISC_ISSUE       0x2   /* ADISC was sent to NL_PORT */
 #define NLP_STE_REG_LOGIN_ISSUE   0x3   /* REG_LOGIN was issued for NL_PORT */
 #define NLP_STE_PRLI_ISSUE        0x4   /* PRLI was sent to NL_PORT */
 #define NLP_STE_LOGO_ISSUE    0x5   /* LOGO was sent to NL_PORT */
 #define NLP_STE_UNMAPPED_NODE     0x6   /* PRLI completed from NL_PORT */
 #define NLP_STE_MAPPED_NODE       0x7   /* Identified as a FCP Target */
 #define NLP_STE_NPR_NODE          0x8   /* NPort disappeared */
 #define NLP_STE_MAX_STATE         0x9
 #define NLP_STE_FREED_NODE        0xff  /* node entry was freed to MEM_NLP */
 
 /* For UNUSED_NODE state, the node has just been allocated.
  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
  * and put on the unmapped list. For ADISC processing, the node is taken off
  * the ADISC list and placed on either the mapped or unmapped list (depending
  * on its previous state). Once on the unmapped list, a PRLI is issued and the
  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
  * changed to PRLI_COMPL. If the completion indicates a mapped
  * node, the node is taken off the unmapped list. The binding list is checked
  * for a valid binding, or a binding is automatically assigned. If binding
  * assignment is unsuccessful, the node is left on the unmapped list. If
  * binding assignment is successful, the associated binding list entry (if
  * any) is removed, and the node is placed on the mapped list.
  */
 /*
  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
  * expire, all effected nodes will receive a DEVICE_RM event.
  */
 /*
  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
  * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
  * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
  * we will first process the ADISC list.  32 entries are processed initially and
  * ADISC is initited for each one.  Completions / Events for each node are
  * funnelled thru the state machine.  As each node finishes ADISC processing, it
  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
  * waiting, and the ADISC list count is identically 0, then we are done. For
  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
  * list.  32 entries are processed initially and PLOGI is initited for each one.
  * Completions / Events for each node are funnelled thru the state machine.  As
  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
  * identically 0, then we are done. We have now completed discovery / RSCN
  * handling. Upon completion, ALL nodes should be on either the mapped or
  * unmapped lists.
  */
 
 /* Defines for Node List Entry Events that could happen */
 #define NLP_EVT_RCV_PLOGI         0x0   /* Rcv'd an ELS PLOGI command */
 #define NLP_EVT_RCV_PRLI          0x1   /* Rcv'd an ELS PRLI  command */
 #define NLP_EVT_RCV_LOGO          0x2   /* Rcv'd an ELS LOGO  command */
 #define NLP_EVT_RCV_ADISC         0x3   /* Rcv'd an ELS ADISC command */
 #define NLP_EVT_RCV_PDISC         0x4   /* Rcv'd an ELS PDISC command */
 #define NLP_EVT_RCV_PRLO          0x5   /* Rcv'd an ELS PRLO  command */
 #define NLP_EVT_CMPL_PLOGI        0x6   /* Sent an ELS PLOGI command */
 #define NLP_EVT_CMPL_PRLI         0x7   /* Sent an ELS PRLI  command */
 #define NLP_EVT_CMPL_LOGO         0x8   /* Sent an ELS LOGO  command */
 #define NLP_EVT_CMPL_ADISC        0x9   /* Sent an ELS ADISC command */
 #define NLP_EVT_CMPL_REG_LOGIN    0xa   /* REG_LOGIN mbox cmd completed */
 #define NLP_EVT_DEVICE_RM         0xb   /* Device not found in NS / ALPAmap */
 #define NLP_EVT_DEVICE_RECOVERY   0xc   /* Device existence unknown */
 #define NLP_EVT_MAX_EVENT         0xd
 #define NLP_EVT_NOTHING_PENDING   0xff

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