tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Linux network driver for Brocade Converged Network Adapter.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License (GPL) Version 2 as
6 * published by the Free Software Foundation
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13/*
14 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
15 * All rights reserved
16 * www.brocade.com
17 */
18
19/**
20 * @file bfasm.h State machine defines
21 */
22
23#ifndef __BFA_SM_H__
24#define __BFA_SM_H__
25
26#include "cna.h"
27
28typedef void (*bfa_sm_t)(void *sm, int event);
29
30/**
31 * oc - object class eg. bfa_ioc
32 * st - state, eg. reset
33 * otype - object type, eg. struct bfa_ioc
34 * etype - object type, eg. enum ioc_event
35 */
36#define bfa_sm_state_decl(oc, st, otype, etype) \
37 static void oc ## _sm_ ## st(otype * fsm, etype event)
38
39#define bfa_sm_set_state(_sm, _state) ((_sm)->sm = (bfa_sm_t)(_state))
40#define bfa_sm_send_event(_sm, _event) ((_sm)->sm((_sm), (_event)))
41#define bfa_sm_get_state(_sm) ((_sm)->sm)
42#define bfa_sm_cmp_state(_sm, _state) ((_sm)->sm == (bfa_sm_t)(_state))
43
44/**
45 * For converting from state machine function to state encoding.
46 */
47struct bfa_sm_table {
48 bfa_sm_t sm; /*!< state machine function */
49 int state; /*!< state machine encoding */
50 char *name; /*!< state name for display */
51};
52#define BFA_SM(_sm) ((bfa_sm_t)(_sm))
53
54/**
55 * State machine with entry actions.
56 */
57typedef void (*bfa_fsm_t)(void *fsm, int event);
58
59/**
60 * oc - object class eg. bfa_ioc
61 * st - state, eg. reset
62 * otype - object type, eg. struct bfa_ioc
63 * etype - object type, eg. enum ioc_event
64 */
65#define bfa_fsm_state_decl(oc, st, otype, etype) \
66 static void oc ## _sm_ ## st(otype * fsm, etype event); \
67 static void oc ## _sm_ ## st ## _entry(otype * fsm)
68
69#define bfa_fsm_set_state(_fsm, _state) do { \
70 (_fsm)->fsm = (bfa_fsm_t)(_state); \
71 _state ## _entry(_fsm); \
72} while (0)
73
74#define bfa_fsm_send_event(_fsm, _event) ((_fsm)->fsm((_fsm), (_event)))
75#define bfa_fsm_get_state(_fsm) ((_fsm)->fsm)
76#define bfa_fsm_cmp_state(_fsm, _state) \
77 ((_fsm)->fsm == (bfa_fsm_t)(_state))
78
79static inline int
80bfa_sm_to_state(const struct bfa_sm_table *smt, bfa_sm_t sm)
81{
82 int i = 0;
83
84 while (smt[i].sm && smt[i].sm != sm)
85 i++;
86 return smt[i].state;
87}
88#endif