drivers/scsi/bfa/include/cs/bfa_sm.h

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 /**
  19  *  bfasm.h State machine defines
  20  */
  21
  22 #ifndef __BFA_SM_H__
  23 #define __BFA_SM_H__
  24
  25 typedef void (*bfa_sm_t)(void *sm, int event);
  26
  27 #define bfa_sm_set_state(_sm, _state)   (_sm)->sm = (bfa_sm_t)(_state)
  28 #define bfa_sm_send_event(_sm, _event)  (_sm)->sm((_sm), (_event))
  29 #define bfa_sm_get_state(_sm)           ((_sm)->sm)
  30 #define bfa_sm_cmp_state(_sm, _state)   ((_sm)->sm == (bfa_sm_t)(_state))
  31
  32 /**
  33  * For converting from state machine function to state encoding.
  34  */
  35 struct bfa_sm_table_s {
  36         bfa_sm_t        sm;     /*  state machine function      */
  37         int             state;  /*  state machine encoding      */
  38         char            *name;  /*  state name for display      */
  39 };
  40 #define BFA_SM(_sm)     ((bfa_sm_t)(_sm))
  41
  42 int bfa_sm_to_state(struct bfa_sm_table_s *smt, bfa_sm_t sm);
  43
  44 /**
  45  * State machine with entry actions.
  46  */
  47 typedef void (*bfa_fsm_t)(void *fsm, int event);
  48
  49 /**
  50  * oc - object class eg. bfa_ioc
  51  * st - state, eg. reset
  52  * otype - object type, eg. struct bfa_ioc_s
  53  * etype - object type, eg. enum ioc_event
  54  */
  55 #define bfa_fsm_state_decl(oc, st, otype, etype)                \
  56         static void oc ## _sm_ ## st(otype * fsm, etype event);      \
  57         static void oc ## _sm_ ## st ## _entry(otype * fsm)
  58
  59 #define bfa_fsm_set_state(_fsm, _state) do {    \
  60         (_fsm)->fsm = (bfa_fsm_t)(_state);      \
  61         _state ## _entry(_fsm);      \
  62 } while (0)
  63
  64 #define bfa_fsm_send_event(_fsm, _event)        \
  65         (_fsm)->fsm((_fsm), (_event))
  66 #define bfa_fsm_cmp_state(_fsm, _state)         \
  67         ((_fsm)->fsm == (bfa_fsm_t)(_state))
  68
  69 #endif