ocs_sm.c

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    1 /*-
    2  * Copyright (c) 2017 Broadcom. All rights reserved.
    3  * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions are met:
    7  *
    8  * 1. Redistributions of source code must retain the above copyright notice,
    9  *    this list of conditions and the following disclaimer.
   10  *
   11  * 2. Redistributions in binary form must reproduce the above copyright notice,
   12  *    this list of conditions and the following disclaimer in the documentation
   13  *    and/or other materials provided with the distribution.
   14  *
   15  * 3. Neither the name of the copyright holder nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 /**
   35  * @file
   36  * Generic state machine framework.
   37  */
   38 
   39 #include "ocs_os.h"
   40 #include "ocs_sm.h"
   41 
   42 const char *ocs_sm_id[] = {
   43         "common",
   44         "domain",
   45         "login"
   46 };
   47 
   48 /**
   49  * @brief Post an event to a context.
   50  *
   51  * @param ctx State machine context
   52  * @param evt Event to post
   53  * @param data Event-specific data (if any)
   54  *
   55  * @return 0 if successfully posted event; -1 if state machine
   56  *         is disabled
   57  */
   58 int
   59 ocs_sm_post_event(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *data)
   60 {
   61         if (ctx->current_state) {
   62                 ctx->current_state(ctx, evt, data);
   63                 return 0;
   64         } else {
   65                 return -1;
   66         }
   67 }
   68 
   69 /**
   70  * @brief Transition to a new state.
   71  */
   72 void
   73 ocs_sm_transition(ocs_sm_ctx_t *ctx, ocs_sm_function_t state, void *data)
   74 {
   75         if (ctx->current_state == state) {
   76                 ocs_sm_post_event(ctx, OCS_EVT_REENTER, data);
   77         } else {
   78                 ocs_sm_post_event(ctx, OCS_EVT_EXIT, data);
   79                 ctx->current_state = state;
   80                 ocs_sm_post_event(ctx, OCS_EVT_ENTER, data);
   81         }
   82 }
   83 
   84 /**
   85  * @brief Disable further state machine processing.
   86  */
   87 void
   88 ocs_sm_disable(ocs_sm_ctx_t *ctx)
   89 {
   90         ctx->current_state = NULL;
   91 }
   92 
   93 const char *ocs_sm_event_name(ocs_sm_event_t evt)
   94 {
   95         switch (evt) {
   96         #define RETEVT(x)       case x:         return #x;
   97         RETEVT(OCS_EVT_ENTER)
   98         RETEVT(OCS_EVT_REENTER)
   99         RETEVT(OCS_EVT_EXIT)
  100         RETEVT(OCS_EVT_SHUTDOWN)
  101         RETEVT(OCS_EVT_RESPONSE)
  102         RETEVT(OCS_EVT_RESUME)
  103         RETEVT(OCS_EVT_TIMER_EXPIRED)
  104         RETEVT(OCS_EVT_ERROR)
  105         RETEVT(OCS_EVT_SRRS_ELS_REQ_OK)
  106         RETEVT(OCS_EVT_SRRS_ELS_CMPL_OK)
  107         RETEVT(OCS_EVT_SRRS_ELS_REQ_FAIL)
  108         RETEVT(OCS_EVT_SRRS_ELS_CMPL_FAIL)
  109         RETEVT(OCS_EVT_SRRS_ELS_REQ_RJT)
  110         RETEVT(OCS_EVT_NODE_ATTACH_OK)
  111         RETEVT(OCS_EVT_NODE_ATTACH_FAIL)
  112         RETEVT(OCS_EVT_NODE_FREE_OK)
  113         RETEVT(OCS_EVT_ELS_REQ_TIMEOUT)
  114         RETEVT(OCS_EVT_ELS_REQ_ABORTED)
  115         RETEVT(OCS_EVT_ABORT_ELS)
  116         RETEVT(OCS_EVT_ELS_ABORT_CMPL)
  117 
  118         RETEVT(OCS_EVT_DOMAIN_FOUND)
  119         RETEVT(OCS_EVT_DOMAIN_ALLOC_OK)
  120         RETEVT(OCS_EVT_DOMAIN_ALLOC_FAIL)
  121         RETEVT(OCS_EVT_DOMAIN_REQ_ATTACH)
  122         RETEVT(OCS_EVT_DOMAIN_ATTACH_OK)
  123         RETEVT(OCS_EVT_DOMAIN_ATTACH_FAIL)
  124         RETEVT(OCS_EVT_DOMAIN_LOST)
  125         RETEVT(OCS_EVT_DOMAIN_FREE_OK)
  126         RETEVT(OCS_EVT_DOMAIN_FREE_FAIL)
  127         RETEVT(OCS_EVT_HW_DOMAIN_REQ_ATTACH)
  128         RETEVT(OCS_EVT_HW_DOMAIN_REQ_FREE)
  129         RETEVT(OCS_EVT_ALL_CHILD_NODES_FREE)
  130 
  131         RETEVT(OCS_EVT_SPORT_ALLOC_OK)
  132         RETEVT(OCS_EVT_SPORT_ALLOC_FAIL)
  133         RETEVT(OCS_EVT_SPORT_ATTACH_OK)
  134         RETEVT(OCS_EVT_SPORT_ATTACH_FAIL)
  135         RETEVT(OCS_EVT_SPORT_FREE_OK)
  136         RETEVT(OCS_EVT_SPORT_FREE_FAIL)
  137         RETEVT(OCS_EVT_SPORT_TOPOLOGY_NOTIFY)
  138         RETEVT(OCS_EVT_HW_PORT_ALLOC_OK)
  139         RETEVT(OCS_EVT_HW_PORT_ALLOC_FAIL)
  140         RETEVT(OCS_EVT_HW_PORT_ATTACH_OK)
  141         RETEVT(OCS_EVT_HW_PORT_REQ_ATTACH)
  142         RETEVT(OCS_EVT_HW_PORT_REQ_FREE)
  143         RETEVT(OCS_EVT_HW_PORT_FREE_OK)
  144 
  145         RETEVT(OCS_EVT_NODE_FREE_FAIL)
  146 
  147         RETEVT(OCS_EVT_ABTS_RCVD)
  148 
  149         RETEVT(OCS_EVT_NODE_MISSING)
  150         RETEVT(OCS_EVT_NODE_REFOUND)
  151         RETEVT(OCS_EVT_SHUTDOWN_IMPLICIT_LOGO)
  152         RETEVT(OCS_EVT_SHUTDOWN_EXPLICIT_LOGO)
  153 
  154         RETEVT(OCS_EVT_ELS_FRAME)
  155         RETEVT(OCS_EVT_PLOGI_RCVD)
  156         RETEVT(OCS_EVT_FLOGI_RCVD)
  157         RETEVT(OCS_EVT_LOGO_RCVD)
  158         RETEVT(OCS_EVT_PRLI_RCVD)
  159         RETEVT(OCS_EVT_PRLO_RCVD)
  160         RETEVT(OCS_EVT_PDISC_RCVD)
  161         RETEVT(OCS_EVT_FDISC_RCVD)
  162         RETEVT(OCS_EVT_ADISC_RCVD)
  163         RETEVT(OCS_EVT_RSCN_RCVD)
  164         RETEVT(OCS_EVT_SCR_RCVD)
  165         RETEVT(OCS_EVT_ELS_RCVD)
  166         RETEVT(OCS_EVT_LAST)
  167         RETEVT(OCS_EVT_FCP_CMD_RCVD)
  168 
  169         RETEVT(OCS_EVT_RFT_ID_RCVD)
  170         RETEVT(OCS_EVT_RFF_ID_RCVD)
  171         RETEVT(OCS_EVT_GNN_ID_RCVD)
  172         RETEVT(OCS_EVT_GPN_ID_RCVD)
  173         RETEVT(OCS_EVT_GFPN_ID_RCVD)
  174         RETEVT(OCS_EVT_GFF_ID_RCVD)
  175         RETEVT(OCS_EVT_GID_FT_RCVD)
  176         RETEVT(OCS_EVT_GID_PT_RCVD)
  177         RETEVT(OCS_EVT_RPN_ID_RCVD)
  178         RETEVT(OCS_EVT_RNN_ID_RCVD)
  179         RETEVT(OCS_EVT_RCS_ID_RCVD)
  180         RETEVT(OCS_EVT_RSNN_NN_RCVD)
  181         RETEVT(OCS_EVT_RSPN_ID_RCVD)
  182         RETEVT(OCS_EVT_RHBA_RCVD)
  183         RETEVT(OCS_EVT_RPA_RCVD)
  184 
  185         RETEVT(OCS_EVT_GIDPT_DELAY_EXPIRED)
  186 
  187         RETEVT(OCS_EVT_ABORT_IO)
  188         RETEVT(OCS_EVT_ABORT_IO_NO_RESP)
  189         RETEVT(OCS_EVT_IO_CMPL)
  190         RETEVT(OCS_EVT_IO_CMPL_ERRORS)
  191         RETEVT(OCS_EVT_RESP_CMPL)
  192         RETEVT(OCS_EVT_ABORT_CMPL)
  193         RETEVT(OCS_EVT_NODE_ACTIVE_IO_LIST_EMPTY)
  194         RETEVT(OCS_EVT_NODE_DEL_INI_COMPLETE)
  195         RETEVT(OCS_EVT_NODE_DEL_TGT_COMPLETE)
  196         RETEVT(OCS_EVT_IO_ABORTED_BY_TMF)
  197         RETEVT(OCS_EVT_IO_ABORT_IGNORED)
  198         RETEVT(OCS_EVT_IO_FIRST_BURST)
  199         RETEVT(OCS_EVT_IO_FIRST_BURST_ERR)
  200         RETEVT(OCS_EVT_IO_FIRST_BURST_ABORTED)
  201 
  202         default:
  203                 break;
  204         #undef RETEVT
  205         }
  206         return "unknown";
  207 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ocs_fc/ocs_sm.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ocs_fc/ocs_sm.c