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