141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/*
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* Linux network driver for Brocade Converged Network Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/*
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* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*/
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/**
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* @file bfa_cs.h BFA common services
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*/
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#ifndef __BFA_CS_H__
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#define __BFA_CS_H__
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#include "cna.h"
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/**
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* @ BFA state machine interfaces
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*/
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typedef void (*bfa_sm_t)(void *sm, int event);
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/**
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* oc - object class eg. bfa_ioc
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* st - state, eg. reset
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* otype - object type, eg. struct bfa_ioc
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* etype - object type, eg. enum ioc_event
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*/
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#define bfa_sm_state_decl(oc, st, otype, etype) \
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static void oc ## _sm_ ## st(otype * fsm, etype event)
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#define bfa_sm_set_state(_sm, _state) ((_sm)->sm = (bfa_sm_t)(_state))
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#define bfa_sm_send_event(_sm, _event) ((_sm)->sm((_sm), (_event)))
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#define bfa_sm_get_state(_sm) ((_sm)->sm)
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#define bfa_sm_cmp_state(_sm, _state) ((_sm)->sm == (bfa_sm_t)(_state))
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/**
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* For converting from state machine function to state encoding.
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*/
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struct bfa_sm_table {
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bfa_sm_t sm; /*!< state machine function */
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int state; /*!< state machine encoding */
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char *name; /*!< state name for display */
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};
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#define BFA_SM(_sm) ((bfa_sm_t)(_sm))
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/**
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* State machine with entry actions.
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*/
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typedef void (*bfa_fsm_t)(void *fsm, int event);
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/**
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* oc - object class eg. bfa_ioc
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* st - state, eg. reset
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* otype - object type, eg. struct bfa_ioc
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* etype - object type, eg. enum ioc_event
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*/
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#define bfa_fsm_state_decl(oc, st, otype, etype) \
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static void oc ## _sm_ ## st(otype * fsm, etype event); \
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static void oc ## _sm_ ## st ## _entry(otype * fsm)
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#define bfa_fsm_set_state(_fsm, _state) do { \
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(_fsm)->fsm = (bfa_fsm_t)(_state); \
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_state ## _entry(_fsm); \
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} while (0)
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#define bfa_fsm_send_event(_fsm, _event) ((_fsm)->fsm((_fsm), (_event)))
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#define bfa_fsm_get_state(_fsm) ((_fsm)->fsm)
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#define bfa_fsm_cmp_state(_fsm, _state) \
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((_fsm)->fsm == (bfa_fsm_t)(_state))
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static inline int
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bfa_sm_to_state(const struct bfa_sm_table *smt, bfa_sm_t sm)
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{
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int i = 0;
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while (smt[i].sm && smt[i].sm != sm)
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i++;
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return smt[i].state;
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}
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/**
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* @ Generic wait counter.
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*/
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typedef void (*bfa_wc_resume_t) (void *cbarg);
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struct bfa_wc {
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bfa_wc_resume_t wc_resume;
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void *wc_cbarg;
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int wc_count;
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};
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static inline void
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bfa_wc_up(struct bfa_wc *wc)
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{
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wc->wc_count++;
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}
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static inline void
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bfa_wc_down(struct bfa_wc *wc)
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{
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wc->wc_count--;
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if (wc->wc_count == 0)
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wc->wc_resume(wc->wc_cbarg);
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}
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/**
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* Initialize a waiting counter.
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*/
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static inline void
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bfa_wc_init(struct bfa_wc *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg)
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{
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wc->wc_resume = wc_resume;
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wc->wc_cbarg = wc_cbarg;
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wc->wc_count = 0;
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bfa_wc_up(wc);
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}
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/**
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* Wait for counter to reach zero
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*/
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static inline void
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bfa_wc_wait(struct bfa_wc *wc)
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{
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bfa_wc_down(wc);
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}
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#endif /* __BFA_CS_H__ */
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