xref: /openbmc/linux/net/llc/llc_s_st.c (revision a34a9f1a)
1  /*
2   * llc_s_st.c - Defines SAP component state machine transitions.
3   *
4   * The followed transitions are SAP component state machine transitions
5   * which are described in 802.2 LLC protocol standard document.
6   *
7   * Copyright (c) 1997 by Procom Technology, Inc.
8   *		 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
9   *
10   * This program can be redistributed or modified under the terms of the
11   * GNU General Public License as published by the Free Software Foundation.
12   * This program is distributed without any warranty or implied warranty
13   * of merchantability or fitness for a particular purpose.
14   *
15   * See the GNU General Public License for more details.
16   */
17  #include <linux/types.h>
18  #include <net/llc_if.h>
19  #include <net/llc_s_ev.h>
20  #include <net/llc_s_ac.h>
21  #include <net/llc_s_st.h>
22  
23  /* dummy last-transition indicator; common to all state transition groups
24   * last entry for this state
25   * all members are zeros, .bss zeroes it
26   */
27  static struct llc_sap_state_trans llc_sap_state_trans_end;
28  
29  /* state LLC_SAP_STATE_INACTIVE transition for
30   * LLC_SAP_EV_ACTIVATION_REQ event
31   */
32  static const llc_sap_action_t llc_sap_inactive_state_actions_1[] = {
33  	[0] = llc_sap_action_report_status,
34  	[1] = NULL,
35  };
36  
37  static struct llc_sap_state_trans llc_sap_inactive_state_trans_1 = {
38  	.ev =		llc_sap_ev_activation_req,
39  	.next_state =	LLC_SAP_STATE_ACTIVE,
40  	.ev_actions =	llc_sap_inactive_state_actions_1,
41  };
42  
43  /* array of pointers; one to each transition */
44  static struct llc_sap_state_trans *llc_sap_inactive_state_transitions[] = {
45  	[0] = &llc_sap_inactive_state_trans_1,
46  	[1] = &llc_sap_state_trans_end,
47  };
48  
49  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_UI event */
50  static const llc_sap_action_t llc_sap_active_state_actions_1[] = {
51  	[0] = llc_sap_action_unitdata_ind,
52  	[1] = NULL,
53  };
54  
55  static struct llc_sap_state_trans llc_sap_active_state_trans_1 = {
56  	.ev =		llc_sap_ev_rx_ui,
57  	.next_state =	LLC_SAP_STATE_ACTIVE,
58  	.ev_actions =	llc_sap_active_state_actions_1,
59  };
60  
61  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_UNITDATA_REQ event */
62  static const llc_sap_action_t llc_sap_active_state_actions_2[] = {
63  	[0] = llc_sap_action_send_ui,
64  	[1] = NULL,
65  };
66  
67  static struct llc_sap_state_trans llc_sap_active_state_trans_2 = {
68  	.ev =		llc_sap_ev_unitdata_req,
69  	.next_state =	LLC_SAP_STATE_ACTIVE,
70  	.ev_actions =	llc_sap_active_state_actions_2,
71  };
72  
73  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_XID_REQ event */
74  static const llc_sap_action_t llc_sap_active_state_actions_3[] = {
75  	[0] = llc_sap_action_send_xid_c,
76  	[1] = NULL,
77  };
78  
79  static struct llc_sap_state_trans llc_sap_active_state_trans_3 = {
80  	.ev =		llc_sap_ev_xid_req,
81  	.next_state =	LLC_SAP_STATE_ACTIVE,
82  	.ev_actions =	llc_sap_active_state_actions_3,
83  };
84  
85  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_C event */
86  static const llc_sap_action_t llc_sap_active_state_actions_4[] = {
87  	[0] = llc_sap_action_send_xid_r,
88  	[1] = NULL,
89  };
90  
91  static struct llc_sap_state_trans llc_sap_active_state_trans_4 = {
92  	.ev =		llc_sap_ev_rx_xid_c,
93  	.next_state =	LLC_SAP_STATE_ACTIVE,
94  	.ev_actions =	llc_sap_active_state_actions_4,
95  };
96  
97  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_R event */
98  static const llc_sap_action_t llc_sap_active_state_actions_5[] = {
99  	[0] = llc_sap_action_xid_ind,
100  	[1] = NULL,
101  };
102  
103  static struct llc_sap_state_trans llc_sap_active_state_trans_5 = {
104  	.ev =		llc_sap_ev_rx_xid_r,
105  	.next_state =	LLC_SAP_STATE_ACTIVE,
106  	.ev_actions =	llc_sap_active_state_actions_5,
107  };
108  
109  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_TEST_REQ event */
110  static const llc_sap_action_t llc_sap_active_state_actions_6[] = {
111  	[0] = llc_sap_action_send_test_c,
112  	[1] = NULL,
113  };
114  
115  static struct llc_sap_state_trans llc_sap_active_state_trans_6 = {
116  	.ev =		llc_sap_ev_test_req,
117  	.next_state =	LLC_SAP_STATE_ACTIVE,
118  	.ev_actions =	llc_sap_active_state_actions_6,
119  };
120  
121  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_C event */
122  static const llc_sap_action_t llc_sap_active_state_actions_7[] = {
123  	[0] = llc_sap_action_send_test_r,
124  	[1] = NULL,
125  };
126  
127  static struct llc_sap_state_trans llc_sap_active_state_trans_7 = {
128  	.ev =		llc_sap_ev_rx_test_c,
129  	.next_state =	LLC_SAP_STATE_ACTIVE,
130  	.ev_actions =	llc_sap_active_state_actions_7
131  };
132  
133  /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_R event */
134  static const llc_sap_action_t llc_sap_active_state_actions_8[] = {
135  	[0] = llc_sap_action_test_ind,
136  	[1] = NULL,
137  };
138  
139  static struct llc_sap_state_trans llc_sap_active_state_trans_8 = {
140  	.ev =		llc_sap_ev_rx_test_r,
141  	.next_state =	LLC_SAP_STATE_ACTIVE,
142  	.ev_actions =	llc_sap_active_state_actions_8,
143  };
144  
145  /* state LLC_SAP_STATE_ACTIVE transition for
146   * LLC_SAP_EV_DEACTIVATION_REQ event
147   */
148  static const llc_sap_action_t llc_sap_active_state_actions_9[] = {
149  	[0] = llc_sap_action_report_status,
150  	[1] = NULL,
151  };
152  
153  static struct llc_sap_state_trans llc_sap_active_state_trans_9 = {
154  	.ev =		llc_sap_ev_deactivation_req,
155  	.next_state =	LLC_SAP_STATE_INACTIVE,
156  	.ev_actions =	llc_sap_active_state_actions_9
157  };
158  
159  /* array of pointers; one to each transition */
160  static struct llc_sap_state_trans *llc_sap_active_state_transitions[] = {
161  	[0] = &llc_sap_active_state_trans_2,
162  	[1] = &llc_sap_active_state_trans_1,
163  	[2] = &llc_sap_active_state_trans_3,
164  	[3] = &llc_sap_active_state_trans_4,
165  	[4] = &llc_sap_active_state_trans_5,
166  	[5] = &llc_sap_active_state_trans_6,
167  	[6] = &llc_sap_active_state_trans_7,
168  	[7] = &llc_sap_active_state_trans_8,
169  	[8] = &llc_sap_active_state_trans_9,
170  	[9] = &llc_sap_state_trans_end,
171  };
172  
173  /* SAP state transition table */
174  struct llc_sap_state llc_sap_state_table[LLC_NR_SAP_STATES] = {
175  	[LLC_SAP_STATE_INACTIVE - 1] = {
176  		.curr_state	= LLC_SAP_STATE_INACTIVE,
177  		.transitions	= llc_sap_inactive_state_transitions,
178  	},
179  	[LLC_SAP_STATE_ACTIVE - 1] = {
180  		.curr_state	= LLC_SAP_STATE_ACTIVE,
181  		.transitions	= llc_sap_active_state_transitions,
182  	},
183  };
184