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 25typedef void (*bfa_sm_t)(void *sm, int event); 26/** 27 * oc - object class eg. bfa_ioc 28 * st - state, eg. reset 29 * otype - object type, eg. struct bfa_ioc_s 30 * etype - object type, eg. enum ioc_event 31 */ 32#define bfa_sm_state_decl(oc, st, otype, etype) \ 33 static void oc ## _sm_ ## st(otype * fsm, etype event) 34 35#define bfa_sm_set_state(_sm, _state) ((_sm)->sm = (bfa_sm_t)(_state)) 36#define bfa_sm_send_event(_sm, _event) ((_sm)->sm((_sm), (_event))) 37#define bfa_sm_get_state(_sm) ((_sm)->sm) 38#define bfa_sm_cmp_state(_sm, _state) ((_sm)->sm == (bfa_sm_t)(_state)) 39 40/** 41 * For converting from state machine function to state encoding. 42 */ 43struct bfa_sm_table_s { 44 bfa_sm_t sm; /* state machine function */ 45 int state; /* state machine encoding */ 46 char *name; /* state name for display */ 47}; 48#define BFA_SM(_sm) ((bfa_sm_t)(_sm)) 49 50int bfa_sm_to_state(struct bfa_sm_table_s *smt, bfa_sm_t sm); 51 52/** 53 * State machine with entry actions. 54 */ 55typedef void (*bfa_fsm_t)(void *fsm, int event); 56 57/** 58 * oc - object class eg. bfa_ioc 59 * st - state, eg. reset 60 * otype - object type, eg. struct bfa_ioc_s 61 * etype - object type, eg. enum ioc_event 62 */ 63#define bfa_fsm_state_decl(oc, st, otype, etype) \ 64 static void oc ## _sm_ ## st(otype * fsm, etype event); \ 65 static void oc ## _sm_ ## st ## _entry(otype * fsm) 66 67#define bfa_fsm_set_state(_fsm, _state) do { \ 68 (_fsm)->fsm = (bfa_fsm_t)(_state); \ 69 _state ## _entry(_fsm); \ 70} while (0) 71 72#define bfa_fsm_send_event(_fsm, _event) \ 73 ((_fsm)->fsm((_fsm), (_event))) 74#define bfa_fsm_cmp_state(_fsm, _state) \ 75 ((_fsm)->fsm == (bfa_fsm_t)(_state)) 76 77#endif 78