/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2017-2024 Broadcom. All Rights Reserved. The term * * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. * * Copyright (C) 2004-2016 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.broadcom.com * * Portions Copyright (C) 2004-2005 Christoph Hellwig * * * * 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. * *******************************************************************/ #include <linux/blkdev.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_transport_fc.h> #include <scsi/fc/fc_fs.h> #include "lpfc_hw4.h" #include "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_sli4.h" #include "lpfc_nl.h" #include "lpfc_disc.h" #include "lpfc.h" #include "lpfc_scsi.h" #include "lpfc_nvme.h" #include "lpfc_logmsg.h" #include "lpfc_crtn.h" #include "lpfc_vport.h" #include "lpfc_debugfs.h" /* Called to clear RSCN discovery flags when driver is unloading. */ static bool lpfc_check_unload_and_clr_rscn(unsigned long *fc_flag) { … } /* Called to verify a rcv'ed ADISC was intended for us. */ static int lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_name *nn, struct lpfc_name *pn) { … } int lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct serv_parm *sp, uint32_t class, int flogi) { … } static void * lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, struct lpfc_iocbq *rspiocb) { … } /* * Free resources / clean up outstanding I/Os * associated with a LPFC_NODELIST entry. This * routine effectively results in a "software abort". */ void lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) { … } /* lpfc_defer_plogi_acc - Issue PLOGI ACC after reg_login completes * @phba: pointer to lpfc hba data structure. * @login_mbox: pointer to REG_RPI mailbox object * * The ACC for a rcv'ed PLOGI is deferred until AFTER the REG_RPI completes */ static void lpfc_defer_plogi_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *login_mbox) { … } static int lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb) { … } /** * lpfc_mbx_cmpl_resume_rpi - Resume RPI completion routine * @phba: pointer to lpfc hba data structure. * @mboxq: pointer to mailbox object * * This routine is invoked to issue a completion to a rcv'ed * ADISC or PDISC after the paused RPI has been resumed. **/ static void lpfc_mbx_cmpl_resume_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq) { … } static int lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb) { … } static int lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb, uint32_t els_cmd) { … } static uint32_t lpfc_rcv_prli_support_check(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb) { … } static void lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb) { … } static uint32_t lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { … } /** * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd. * @phba : Pointer to lpfc_hba structure. * @vport: Pointer to lpfc_vport structure. * @ndlp: Pointer to lpfc_nodelist structure. * @rpi : rpi to be release. * * This function will send a unreg_login mailbox command to the firmware * to release a rpi. **/ static void lpfc_release_rpi(struct lpfc_hba *phba, struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, uint16_t rpi) { … } static uint32_t lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } /* Start of Discovery State Machine routines */ static uint32_t lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } /* This routine is envoked when we rcv a PRLO request from a nport * we are logged into. We should send back a PRLO rsp setting the * appropriate bits. * NEXT STATE = PRLI_ISSUE */ static uint32_t lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } /*! lpfc_device_rm_prli_issue * * \pre * \post * \param phba * \param ndlp * \param arg * \param evt * \return uint32_t * * \b Description: * This routine is envoked when we a request to remove a nport we are in the * process of PRLIing. We should software abort outstanding prli, unreg * login, send a logout. We will change node state to UNUSED_NODE, put it * on plogi list so it can be freed when LOGO completes. * */ static uint32_t lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } /*! lpfc_device_recov_prli_issue * * \pre * \post * \param phba * \param ndlp * \param arg * \param evt * \return uint32_t * * \b Description: * The routine is envoked when the state of a device is unknown, like * during a link down. We should remove the nodelist entry from the * unmapped list, issue a UNREG_LOGIN, do a software abort of the * outstanding PRLI command, then free the node entry. */ static uint32_t lpfc_device_recov_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } static uint32_t lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … } /* This next section defines the NPort Discovery State Machine */ /* There are 4 different double linked lists nodelist entries can reside on. * The plogi list and adisc list are used when Link Up discovery or RSCN * processing is needed. Each list holds the nodes that we will send PLOGI * or ADISC on. These lists will keep track of what nodes will be effected * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up). * The unmapped_list will contain all nodes that we 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. */ /* 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 UNMAPPED_NODE. 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 or removed (via 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 * indentically 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. */ static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT]) (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = …; int lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { … }
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