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295 lines
14 KiB
295 lines
14 KiB
/******************************************************************* |
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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) 2017-2021 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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LPFC_EVT_RECOVER_PORT |
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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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enum lpfc_fc4_xpt_flags { |
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NLP_XPT_REGD = 0x1, |
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SCSI_XPT_REGD = 0x2, |
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NVME_XPT_REGD = 0x4, |
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NVME_XPT_UNREG_WAIT = 0x8, |
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NLP_XPT_HAS_HH = 0x10 |
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}; |
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enum lpfc_nlp_save_flags { |
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/* devloss occurred during recovery */ |
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NLP_IN_RECOV_POST_DEV_LOSS = 0x1, |
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/* wait for outstanding LOGO to cmpl */ |
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NLP_WAIT_FOR_LOGO = 0x2, |
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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 serv_parm fc_sparam; /* buffer for service params */ |
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struct lpfc_name nlp_portname; |
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struct lpfc_name nlp_nodename; |
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spinlock_t lock; /* Node management lock */ |
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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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u8 nlp_nvme_info; /* NVME NSLER Support */ |
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uint8_t vmid_support; /* destination VMID support */ |
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#define NLP_NVME_NSLER 0x1 /* NVME NSLER device */ |
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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 lpfc_work_evt recovery_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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/* flags to keep ndlp alive until special conditions are met */ |
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enum lpfc_nlp_save_flags save_flags; |
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enum lpfc_fc4_xpt_flags fc4_xpt_flags; |
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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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wait_queue_head_t *logo_waitq; |
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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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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_RELEASE_RPI 0x00000004 /* Release RPI to free pool */ |
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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_DROPPED 0x00010000 /* Init ref count has been dropped */ |
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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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/* 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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