| /******************************************************************* |
| * This file is part of the Emulex Linux Device Driver for * |
| * Fibre Channel Host Bus Adapters. * |
| * Copyright (C) 2004-2008 Emulex. All rights reserved. * |
| * EMULEX and SLI are trademarks of Emulex. * |
| * www.emulex.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 65536 /* 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, |
| }; |
| |
| /* 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; |
| }; |
| |
| struct lpfc_nodelist { |
| struct list_head nlp_listp; |
| struct lpfc_name nlp_portname; |
| struct lpfc_name nlp_nodename; |
| 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 */ |
| |
| 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 */ |
| |
| uint16_t nlp_usg_map; /* ndlp management usage bitmap */ |
| #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */ |
| #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */ |
| #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */ |
| #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */ |
| |
| struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ |
| struct lpfc_hba *phba; |
| struct fc_rport *rport; /* Corresponding FC transport |
| port structure */ |
| struct lpfc_vport *vport; |
| struct lpfc_work_evt els_retry_evt; |
| struct lpfc_work_evt dev_loss_evt; |
| unsigned long last_ramp_up_time; /* jiffy of last ramp up */ |
| unsigned long last_q_full_time; /* jiffy of last queue full */ |
| struct kref kref; |
| atomic_t cmd_pending; |
| uint32_t cmd_qdepth; |
| unsigned long last_change_time; |
| struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ |
| }; |
| |
| /* Defines for nlp_flag (uint32) */ |
| #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_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ |
| #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_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_RPI_VALID 0x80000000 /* nlp_rpi is valid */ |
| |
| /* ndlp usage management macros */ |
| #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ |
| & NLP_USG_NODE_ACT_BIT) \ |
| && \ |
| !((ndlp)->nlp_usg_map \ |
| & NLP_USG_FREE_ACK_BIT)) |
| #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| |= NLP_USG_NODE_ACT_BIT) |
| #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| = NLP_USG_NODE_ACT_BIT) |
| #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| &= ~NLP_USG_NODE_ACT_BIT) |
| #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| & NLP_USG_IACT_REQ_BIT) |
| #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| |= NLP_USG_IACT_REQ_BIT) |
| #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| & NLP_USG_FREE_REQ_BIT) |
| #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| |= NLP_USG_FREE_REQ_BIT) |
| #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ |
| & NLP_USG_FREE_ACK_BIT) |
| #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ |
| |= NLP_USG_FREE_ACK_BIT) |
| |
| /* 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_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ |
| #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ |
| #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ |
| #define NLP_STE_MAX_STATE 0x8 |
| #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 |
| |