dea16bdae2
The driver is getting hit with 100s of RSCNs during remote port address changes. Each of those RSCN's ends up generating UNREG_RPI and REG_PRI mailbox commands. The discovery engine within the driver doesn't wait for the mailbox command completions. Instead it sets state flags and moves forward. At some point, there's a massive backlog of mailbox commands which take time for the adapter to process. Additionally, it appears there were duplicate events from the switch so the driver generated duplicate mailbox commands for the same remote port. During this window, failures on PLOGI and PRLI ELS's are see as the adapter is rejecting them as they are for remote ports that still have pending mailbox commands. Streamline the discovery engine so that PLOGI log checks for outstanding UNREG_RPIs and defer the processing until the commands complete. This better synchronizes the ELS transmission vs the RPI registrations. Filter out multiple UNREG_RPIs being queued up for the same remote port. Beef up log messages in this area. Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
299 lines
14 KiB
C
299 lines
14 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) 2017-2018 Broadcom. All Rights Reserved. The term *
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
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* Copyright (C) 2004-2013 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.broadcom.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 64512 /* 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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LPFC_EVT_RESET_HBA,
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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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#define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */
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#define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)
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struct lpfc_node_rrqs {
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unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
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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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#define NLP_NVME_TARGET 0x20 /* entry is a NVME Target */
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#define NLP_NVME_INITIATOR 0x40 /* entry is a NVME Initiator */
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#define NLP_NVME_DISCOVERY 0x80 /* entry has NVME disc srvc */
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uint16_t nlp_fc4_type; /* FC types node supports. */
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/* Assigned from GID_FF, only
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* FCP (0x8) and NVME (0x28)
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* supported.
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*/
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#define NLP_FC4_NONE 0x0
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#define NLP_FC4_FCP 0x1 /* FC4 Type FCP (value x8)) */
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#define NLP_FC4_NVME 0x2 /* FC4 TYPE NVME (value x28) */
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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; /* scsi_transport_fc port structure */
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struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */
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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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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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unsigned long *active_rrqs_xri_bitmap;
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struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
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uint32_t fc4_prli_sent;
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uint32_t upcall_flags;
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#define NLP_WAIT_FOR_UNREG 0x1
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uint32_t nvme_fb_size; /* NVME target's supported byte cnt */
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#define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */
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uint32_t nlp_defer_did;
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};
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struct lpfc_node_rrq {
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struct list_head list;
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uint16_t xritag;
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uint16_t send_rrq;
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uint16_t rxid;
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uint32_t nlp_DID; /* FC D_ID of entry */
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struct lpfc_vport *vport;
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struct lpfc_nodelist *ndlp;
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unsigned long rrq_stop_time;
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};
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#define lpfc_ndlp_check_qdepth(phba, ndlp) \
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(ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri)
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/* Defines for nlp_flag (uint32) */
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#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
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#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
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#define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */
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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_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */
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#define NLP_FCP_PRLI_RJT 0x00002000 /* Rport does not support FCP PRLI. */
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#define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */
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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_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */
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#define NLP_IN_DEV_LOSS 0x00800000 /* devloss in progress */
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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_FIRSTBURST 0x40000000 /* Target supports FirstBurst */
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#define NLP_RPI_REGISTERED 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_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */
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#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */
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#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */
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#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */
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#define NLP_STE_MAX_STATE 0x9
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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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#define NLP_EVT_NOTHING_PENDING 0xff
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