| Rasesh Mody | 8b230ed | 2010-08-23 20:24:12 -0700 | [diff] [blame] | 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 | |
| 28 | typedef 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 | */ |
| 47 | struct 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 | */ |
| 57 | typedef 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 | |
| 79 | static inline int |
| Rasesh Mody | b7ee31c5 | 2010-10-05 15:46:05 +0000 | [diff] [blame] | 80 | bfa_sm_to_state(const struct bfa_sm_table *smt, bfa_sm_t sm) |
| Rasesh Mody | 8b230ed | 2010-08-23 20:24:12 -0700 | [diff] [blame] | 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 |