248 lines
12 KiB
C
248 lines
12 KiB
C
/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2004-2008 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*******************************************************************/
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#define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */
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#define FC_MAX_NS_RSP 65536 /* max size NameServer rsp */
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#define FC_MAXLOOP 126 /* max devices supported on a fc loop */
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#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
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/* This is the protocol dependent definition for a Node List Entry.
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* This is used by Fibre Channel protocol to support FCP.
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*/
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/* worker thread events */
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enum lpfc_work_type {
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LPFC_EVT_ONLINE,
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LPFC_EVT_OFFLINE_PREP,
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LPFC_EVT_OFFLINE,
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LPFC_EVT_WARM_START,
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LPFC_EVT_KILL,
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LPFC_EVT_ELS_RETRY,
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LPFC_EVT_DEV_LOSS,
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LPFC_EVT_FASTPATH_MGMT_EVT,
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};
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/* structure used to queue event to the discovery tasklet */
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struct lpfc_work_evt {
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struct list_head evt_listp;
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void *evt_arg1;
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void *evt_arg2;
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enum lpfc_work_type evt;
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};
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struct lpfc_scsi_check_condition_event;
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struct lpfc_scsi_varqueuedepth_event;
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struct lpfc_scsi_event_header;
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struct lpfc_fabric_event_header;
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struct lpfc_fcprdchkerr_event;
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/* structure used for sending events from fast path */
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struct lpfc_fast_path_event {
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struct lpfc_work_evt work_evt;
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struct lpfc_vport *vport;
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union {
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struct lpfc_scsi_check_condition_event check_cond_evt;
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struct lpfc_scsi_varqueuedepth_event queue_depth_evt;
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struct lpfc_scsi_event_header scsi_evt;
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struct lpfc_fabric_event_header fabric_evt;
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struct lpfc_fcprdchkerr_event read_check_error;
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} un;
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};
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struct lpfc_nodelist {
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struct list_head nlp_listp;
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struct lpfc_name nlp_portname;
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struct lpfc_name nlp_nodename;
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uint32_t nlp_flag; /* entry flags */
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uint32_t nlp_DID; /* FC D_ID of entry */
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uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
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uint16_t nlp_type;
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#define NLP_FC_NODE 0x1 /* entry is an FC node */
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#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
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#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
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#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
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uint16_t nlp_rpi;
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uint16_t nlp_state; /* state transition indicator */
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uint16_t nlp_prev_state; /* state transition indicator */
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uint16_t nlp_xri; /* output exchange id for RPI */
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uint16_t nlp_sid; /* scsi id */
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#define NLP_NO_SID 0xffff
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uint16_t nlp_maxframe; /* Max RCV frame size */
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uint8_t nlp_class_sup; /* Supported Classes */
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uint8_t nlp_retry; /* used for ELS retries */
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uint8_t nlp_fcp_info; /* class info, bits 0-3 */
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#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
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uint16_t nlp_usg_map; /* ndlp management usage bitmap */
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#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
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#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
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#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
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#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
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struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
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struct lpfc_hba *phba;
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struct fc_rport *rport; /* Corresponding FC transport
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port structure */
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struct lpfc_vport *vport;
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struct lpfc_work_evt els_retry_evt;
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struct lpfc_work_evt dev_loss_evt;
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unsigned long last_ramp_up_time; /* jiffy of last ramp up */
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unsigned long last_q_full_time; /* jiffy of last queue full */
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struct kref kref;
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atomic_t cmd_pending;
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uint32_t cmd_qdepth;
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unsigned long last_change_time;
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struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
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};
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/* Defines for nlp_flag (uint32) */
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#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
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#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
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#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
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#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
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#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
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#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
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#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
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#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
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#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
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#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
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#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
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#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
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#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
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ACC */
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#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
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NPR list */
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#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
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#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
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#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
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#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
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#define NLP_RPI_VALID 0x80000000 /* nlp_rpi is valid */
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/* ndlp usage management macros */
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#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
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& NLP_USG_NODE_ACT_BIT) \
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&& \
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!((ndlp)->nlp_usg_map \
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& NLP_USG_FREE_ACK_BIT))
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#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
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|= NLP_USG_NODE_ACT_BIT)
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#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
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= NLP_USG_NODE_ACT_BIT)
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#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
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&= ~NLP_USG_NODE_ACT_BIT)
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#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
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& NLP_USG_IACT_REQ_BIT)
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#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
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|= NLP_USG_IACT_REQ_BIT)
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#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
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& NLP_USG_FREE_REQ_BIT)
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#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
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|= NLP_USG_FREE_REQ_BIT)
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#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
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& NLP_USG_FREE_ACK_BIT)
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#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
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|= NLP_USG_FREE_ACK_BIT)
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/* There are 4 different double linked lists nodelist entries can reside on.
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* The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
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* when Link Up discovery or Registered State Change Notification (RSCN)
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* processing is needed. Each list holds the nodes that require a PLOGI or
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* ADISC Extended Link Service (ELS) request. These lists keep track of the
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* nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
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* by Link Up) event. The unmapped_list contains all nodes that have
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* successfully logged into at the Fibre Channel level. The
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* mapped_list will contain all nodes that are mapped FCP targets.
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*
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* The bind list is a list of undiscovered (potentially non-existent) nodes
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* that we have saved binding information on. This information is used when
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* nodes transition from the unmapped to the mapped list.
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*/
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/* Defines for nlp_state */
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#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
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#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
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#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
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#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
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#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
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#define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */
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#define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */
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#define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */
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#define NLP_STE_MAX_STATE 0x8
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#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
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/* For UNUSED_NODE state, the node has just been allocated.
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* For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
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* the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
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* and put on the unmapped list. For ADISC processing, the node is taken off
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* the ADISC list and placed on either the mapped or unmapped list (depending
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* on its previous state). Once on the unmapped list, a PRLI is issued and the
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* state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
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* changed to PRLI_COMPL. If the completion indicates a mapped
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* node, the node is taken off the unmapped list. The binding list is checked
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* for a valid binding, or a binding is automatically assigned. If binding
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* assignment is unsuccessful, the node is left on the unmapped list. If
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* binding assignment is successful, the associated binding list entry (if
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* any) is removed, and the node is placed on the mapped list.
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*/
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/*
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* For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
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* lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
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* expire, all effected nodes will receive a DEVICE_RM event.
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*/
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/*
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* For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
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* to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
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* check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
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* from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
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* we will first process the ADISC list. 32 entries are processed initially and
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* ADISC is initited for each one. Completions / Events for each node are
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* funnelled thru the state machine. As each node finishes ADISC processing, it
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* starts ADISC for any nodes waiting for ADISC processing. If no nodes are
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* waiting, and the ADISC list count is identically 0, then we are done. For
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* Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
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* can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
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* list. 32 entries are processed initially and PLOGI is initited for each one.
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* Completions / Events for each node are funnelled thru the state machine. As
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* each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
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* for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
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* identically 0, then we are done. We have now completed discovery / RSCN
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* handling. Upon completion, ALL nodes should be on either the mapped or
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* unmapped lists.
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*/
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/* Defines for Node List Entry Events that could happen */
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#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
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#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
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#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
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#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
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#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
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#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
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#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
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#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
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#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
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#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
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#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
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#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
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#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
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#define NLP_EVT_MAX_EVENT 0xd
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