--- /dev/null
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for *
+ * Fibre Channel Host Bus Adapters. *
+ * Copyright (C) 2004-2013 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 64512 /* max size NameServer rsp */
+#define FC_MAXLOOP 126 /* max devices supported on a fc loop */
+#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
+
+
+/* This is the protocol dependent definition for a Node List Entry.
+ * This is used by Fibre Channel protocol to support FCP.
+ */
+
+/* worker thread events */
+enum lpfc_work_type {
+ LPFC_EVT_ONLINE,
+ LPFC_EVT_OFFLINE_PREP,
+ LPFC_EVT_OFFLINE,
+ LPFC_EVT_WARM_START,
+ LPFC_EVT_KILL,
+ LPFC_EVT_ELS_RETRY,
+ LPFC_EVT_DEV_LOSS,
+ LPFC_EVT_FASTPATH_MGMT_EVT,
+ LPFC_EVT_RESET_HBA,
+};
+
+/* structure used to queue event to the discovery tasklet */
+struct lpfc_work_evt {
+ struct list_head evt_listp;
+ void *evt_arg1;
+ void *evt_arg2;
+ enum lpfc_work_type evt;
+};
+
+struct lpfc_scsi_check_condition_event;
+struct lpfc_scsi_varqueuedepth_event;
+struct lpfc_scsi_event_header;
+struct lpfc_fabric_event_header;
+struct lpfc_fcprdchkerr_event;
+
+/* structure used for sending events from fast path */
+struct lpfc_fast_path_event {
+ struct lpfc_work_evt work_evt;
+ struct lpfc_vport *vport;
+ union {
+ struct lpfc_scsi_check_condition_event check_cond_evt;
+ struct lpfc_scsi_varqueuedepth_event queue_depth_evt;
+ struct lpfc_scsi_event_header scsi_evt;
+ struct lpfc_fabric_event_header fabric_evt;
+ struct lpfc_fcprdchkerr_event read_check_error;
+ } un;
+};
+
+#define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */
+#define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)
+struct lpfc_node_rrqs {
+ unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
+};
+
+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_add_flag; /* additional 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;
+ struct kref kref;
+ atomic_t cmd_pending;
+ uint32_t cmd_qdepth;
+ unsigned long last_change_time;
+ unsigned long *active_rrqs_xri_bitmap;
+ struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
+};
+struct lpfc_node_rrq {
+ struct list_head list;
+ uint16_t xritag;
+ uint16_t send_rrq;
+ uint16_t rxid;
+ uint32_t nlp_DID; /* FC D_ID of entry */
+ struct lpfc_vport *vport;
+ struct lpfc_nodelist *ndlp;
+ unsigned long rrq_stop_time;
+};
+
+/* Defines for nlp_flag (uint32) */
+#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
+#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
+#define NLP_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_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */
+#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
+ ACC */
+#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
+ NPR list */
+#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
+#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
+#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
+#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
+#define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */
+#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */
+
+/* Defines for nlp_add_flag (uint32) */
+#define NLP_IN_DEV_LOSS 0x00000001 /* Dev Loss processing in progress */
+
+/* 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_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */
+#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */
+#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */
+#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */
+#define NLP_STE_MAX_STATE 0x9
+#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
+
+/* For UNUSED_NODE state, the node has just been allocated.
+ * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
+ * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
+ * and put on the unmapped list. For ADISC processing, the node is taken off
+ * the ADISC list and placed on either the mapped or unmapped list (depending
+ * on its previous state). Once on the unmapped list, a PRLI is issued and the
+ * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
+ * changed to PRLI_COMPL. If the completion indicates a mapped
+ * node, the node is taken off the unmapped list. The binding list is checked
+ * for a valid binding, or a binding is automatically assigned. If binding
+ * assignment is unsuccessful, the node is left on the unmapped list. If
+ * binding assignment is successful, the associated binding list entry (if
+ * any) is removed, and the node is placed on the mapped list.
+ */
+/*
+ * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
+ * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
+ * expire, all effected nodes will receive a DEVICE_RM event.
+ */
+/*
+ * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
+ * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
+ * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
+ * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
+ * we will first process the ADISC list. 32 entries are processed initially and
+ * ADISC is initited for each one. Completions / Events for each node are
+ * funnelled thru the state machine. As each node finishes ADISC processing, it
+ * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
+ * waiting, and the ADISC list count is identically 0, then we are done. For
+ * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
+ * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
+ * list. 32 entries are processed initially and PLOGI is initited for each one.
+ * Completions / Events for each node are funnelled thru the state machine. As
+ * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
+ * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
+ * identically 0, then we are done. We have now completed discovery / RSCN
+ * handling. Upon completion, ALL nodes should be on either the mapped or
+ * unmapped lists.
+ */
+
+/* Defines for Node List Entry Events that could happen */
+#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
+#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
+#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
+#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
+#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
+#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
+#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
+#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
+#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
+#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
+#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
+#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
+#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
+#define NLP_EVT_MAX_EVENT 0xd
+
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