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293d984f | 1 | /* |
293d984f PT |
2 | * Copyright IBM Corp. 2001, 2007 |
3 | * Authors: Fritz Elfert (felfert@millenux.com) | |
4 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
5 | * MPC additions : | |
6 | * Belinda Thompson (belindat@us.ibm.com) | |
7 | * Andy Richter (richtera@us.ibm.com) | |
8 | */ | |
9 | #ifndef _CTCM_FSMS_H_ | |
10 | #define _CTCM_FSMS_H_ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/timer.h> | |
20 | #include <linux/bitops.h> | |
21 | ||
22 | #include <linux/signal.h> | |
23 | #include <linux/string.h> | |
24 | ||
25 | #include <linux/ip.h> | |
26 | #include <linux/if_arp.h> | |
27 | #include <linux/tcp.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/ctype.h> | |
30 | #include <net/dst.h> | |
31 | ||
32 | #include <linux/io.h> | |
33 | #include <asm/ccwdev.h> | |
34 | #include <asm/ccwgroup.h> | |
35 | #include <linux/uaccess.h> | |
36 | ||
37 | #include <asm/idals.h> | |
38 | ||
39 | #include "fsm.h" | |
293d984f PT |
40 | #include "ctcm_main.h" |
41 | ||
42 | /* | |
43 | * Definitions for the channel statemachine(s) for ctc and ctcmpc | |
44 | * | |
45 | * To allow better kerntyping, prefix-less definitions for channel states | |
46 | * and channel events have been replaced : | |
47 | * ch_event... -> ctc_ch_event... | |
48 | * CH_EVENT... -> CTC_EVENT... | |
49 | * ch_state... -> ctc_ch_state... | |
50 | * CH_STATE... -> CTC_STATE... | |
51 | */ | |
52 | /* | |
53 | * Events of the channel statemachine(s) for ctc and ctcmpc | |
54 | */ | |
55 | enum ctc_ch_events { | |
56 | /* | |
57 | * Events, representing return code of | |
58 | * I/O operations (ccw_device_start, ccw_device_halt et al.) | |
59 | */ | |
60 | CTC_EVENT_IO_SUCCESS, | |
61 | CTC_EVENT_IO_EBUSY, | |
62 | CTC_EVENT_IO_ENODEV, | |
63 | CTC_EVENT_IO_UNKNOWN, | |
64 | ||
65 | CTC_EVENT_ATTNBUSY, | |
66 | CTC_EVENT_ATTN, | |
67 | CTC_EVENT_BUSY, | |
68 | /* | |
69 | * Events, representing unit-check | |
70 | */ | |
71 | CTC_EVENT_UC_RCRESET, | |
72 | CTC_EVENT_UC_RSRESET, | |
73 | CTC_EVENT_UC_TXTIMEOUT, | |
74 | CTC_EVENT_UC_TXPARITY, | |
75 | CTC_EVENT_UC_HWFAIL, | |
76 | CTC_EVENT_UC_RXPARITY, | |
77 | CTC_EVENT_UC_ZERO, | |
78 | CTC_EVENT_UC_UNKNOWN, | |
79 | /* | |
80 | * Events, representing subchannel-check | |
81 | */ | |
82 | CTC_EVENT_SC_UNKNOWN, | |
83 | /* | |
84 | * Events, representing machine checks | |
85 | */ | |
86 | CTC_EVENT_MC_FAIL, | |
87 | CTC_EVENT_MC_GOOD, | |
88 | /* | |
89 | * Event, representing normal IRQ | |
90 | */ | |
91 | CTC_EVENT_IRQ, | |
92 | CTC_EVENT_FINSTAT, | |
93 | /* | |
94 | * Event, representing timer expiry. | |
95 | */ | |
96 | CTC_EVENT_TIMER, | |
97 | /* | |
98 | * Events, representing commands from upper levels. | |
99 | */ | |
100 | CTC_EVENT_START, | |
101 | CTC_EVENT_STOP, | |
102 | CTC_NR_EVENTS, | |
103 | /* | |
104 | * additional MPC events | |
105 | */ | |
106 | CTC_EVENT_SEND_XID = CTC_NR_EVENTS, | |
107 | CTC_EVENT_RSWEEP_TIMER, | |
108 | /* | |
109 | * MUST be always the last element!! | |
110 | */ | |
111 | CTC_MPC_NR_EVENTS, | |
112 | }; | |
113 | ||
114 | /* | |
115 | * States of the channel statemachine(s) for ctc and ctcmpc. | |
116 | */ | |
117 | enum ctc_ch_states { | |
118 | /* | |
119 | * Channel not assigned to any device, | |
120 | * initial state, direction invalid | |
121 | */ | |
122 | CTC_STATE_IDLE, | |
123 | /* | |
124 | * Channel assigned but not operating | |
125 | */ | |
126 | CTC_STATE_STOPPED, | |
127 | CTC_STATE_STARTWAIT, | |
128 | CTC_STATE_STARTRETRY, | |
129 | CTC_STATE_SETUPWAIT, | |
130 | CTC_STATE_RXINIT, | |
131 | CTC_STATE_TXINIT, | |
132 | CTC_STATE_RX, | |
133 | CTC_STATE_TX, | |
134 | CTC_STATE_RXIDLE, | |
135 | CTC_STATE_TXIDLE, | |
136 | CTC_STATE_RXERR, | |
137 | CTC_STATE_TXERR, | |
138 | CTC_STATE_TERM, | |
139 | CTC_STATE_DTERM, | |
140 | CTC_STATE_NOTOP, | |
141 | CTC_NR_STATES, /* MUST be the last element of non-expanded states */ | |
142 | /* | |
143 | * additional MPC states | |
144 | */ | |
145 | CH_XID0_PENDING = CTC_NR_STATES, | |
146 | CH_XID0_INPROGRESS, | |
147 | CH_XID7_PENDING, | |
148 | CH_XID7_PENDING1, | |
149 | CH_XID7_PENDING2, | |
150 | CH_XID7_PENDING3, | |
151 | CH_XID7_PENDING4, | |
152 | CTC_MPC_NR_STATES, /* MUST be the last element of expanded mpc states */ | |
153 | }; | |
154 | ||
155 | extern const char *ctc_ch_event_names[]; | |
156 | ||
157 | extern const char *ctc_ch_state_names[]; | |
158 | ||
159 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg); | |
160 | void ctcm_purge_skb_queue(struct sk_buff_head *q); | |
161 | void fsm_action_nop(fsm_instance *fi, int event, void *arg); | |
162 | ||
163 | /* | |
164 | * ----- non-static actions for ctcm channel statemachine ----- | |
165 | * | |
166 | */ | |
167 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg); | |
168 | ||
169 | /* | |
170 | * ----- FSM (state/event/action) of the ctcm channel statemachine ----- | |
171 | */ | |
172 | extern const fsm_node ch_fsm[]; | |
173 | extern int ch_fsm_len; | |
174 | ||
175 | ||
176 | /* | |
177 | * ----- non-static actions for ctcmpc channel statemachine ---- | |
178 | * | |
179 | */ | |
180 | /* shared : | |
181 | void ctcm_chx_txidle(fsm_instance * fi, int event, void *arg); | |
182 | */ | |
183 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg); | |
184 | ||
185 | /* | |
186 | * ----- FSM (state/event/action) of the ctcmpc channel statemachine ----- | |
187 | */ | |
188 | extern const fsm_node ctcmpc_ch_fsm[]; | |
189 | extern int mpc_ch_fsm_len; | |
190 | ||
191 | /* | |
192 | * Definitions for the device interface statemachine for ctc and mpc | |
193 | */ | |
194 | ||
195 | /* | |
196 | * States of the device interface statemachine. | |
197 | */ | |
198 | enum dev_states { | |
199 | DEV_STATE_STOPPED, | |
200 | DEV_STATE_STARTWAIT_RXTX, | |
201 | DEV_STATE_STARTWAIT_RX, | |
202 | DEV_STATE_STARTWAIT_TX, | |
203 | DEV_STATE_STOPWAIT_RXTX, | |
204 | DEV_STATE_STOPWAIT_RX, | |
205 | DEV_STATE_STOPWAIT_TX, | |
206 | DEV_STATE_RUNNING, | |
207 | /* | |
208 | * MUST be always the last element!! | |
209 | */ | |
210 | CTCM_NR_DEV_STATES | |
211 | }; | |
212 | ||
213 | extern const char *dev_state_names[]; | |
214 | ||
215 | /* | |
216 | * Events of the device interface statemachine. | |
217 | * ctcm and ctcmpc | |
218 | */ | |
219 | enum dev_events { | |
220 | DEV_EVENT_START, | |
221 | DEV_EVENT_STOP, | |
222 | DEV_EVENT_RXUP, | |
223 | DEV_EVENT_TXUP, | |
224 | DEV_EVENT_RXDOWN, | |
225 | DEV_EVENT_TXDOWN, | |
226 | DEV_EVENT_RESTART, | |
227 | /* | |
228 | * MUST be always the last element!! | |
229 | */ | |
230 | CTCM_NR_DEV_EVENTS | |
231 | }; | |
232 | ||
233 | extern const char *dev_event_names[]; | |
234 | ||
235 | /* | |
236 | * Actions for the device interface statemachine. | |
237 | * ctc and ctcmpc | |
238 | */ | |
239 | /* | |
240 | static void dev_action_start(fsm_instance * fi, int event, void *arg); | |
241 | static void dev_action_stop(fsm_instance * fi, int event, void *arg); | |
242 | static void dev_action_restart(fsm_instance *fi, int event, void *arg); | |
243 | static void dev_action_chup(fsm_instance * fi, int event, void *arg); | |
244 | static void dev_action_chdown(fsm_instance * fi, int event, void *arg); | |
245 | */ | |
246 | ||
247 | /* | |
248 | * The (state/event/action) fsm table of the device interface statemachine. | |
249 | * ctcm and ctcmpc | |
250 | */ | |
251 | extern const fsm_node dev_fsm[]; | |
252 | extern int dev_fsm_len; | |
253 | ||
254 | ||
255 | /* | |
256 | * Definitions for the MPC Group statemachine | |
257 | */ | |
258 | ||
259 | /* | |
260 | * MPC Group Station FSM States | |
261 | ||
262 | State Name When In This State | |
263 | ====================== ======================================= | |
264 | MPCG_STATE_RESET Initial State When Driver Loaded | |
265 | We receive and send NOTHING | |
266 | ||
267 | MPCG_STATE_INOP INOP Received. | |
268 | Group level non-recoverable error | |
269 | ||
270 | MPCG_STATE_READY XID exchanges for at least 1 write and | |
271 | 1 read channel have completed. | |
272 | Group is ready for data transfer. | |
273 | ||
274 | States from ctc_mpc_alloc_channel | |
275 | ============================================================== | |
276 | MPCG_STATE_XID2INITW Awaiting XID2(0) Initiation | |
277 | ATTN from other side will start | |
278 | XID negotiations. | |
279 | Y-side protocol only. | |
280 | ||
281 | MPCG_STATE_XID2INITX XID2(0) negotiations are in progress. | |
282 | At least 1, but not all, XID2(0)'s | |
283 | have been received from partner. | |
284 | ||
285 | MPCG_STATE_XID7INITW XID2(0) complete | |
286 | No XID2(7)'s have yet been received. | |
287 | XID2(7) negotiations pending. | |
288 | ||
289 | MPCG_STATE_XID7INITX XID2(7) negotiations in progress. | |
290 | At least 1, but not all, XID2(7)'s | |
291 | have been received from partner. | |
292 | ||
293 | MPCG_STATE_XID7INITF XID2(7) negotiations complete. | |
294 | Transitioning to READY. | |
295 | ||
296 | MPCG_STATE_READY Ready for Data Transfer. | |
297 | ||
298 | ||
299 | States from ctc_mpc_establish_connectivity call | |
300 | ============================================================== | |
301 | MPCG_STATE_XID0IOWAIT Initiating XID2(0) negotiations. | |
302 | X-side protocol only. | |
303 | ATTN-BUSY from other side will convert | |
304 | this to Y-side protocol and the | |
305 | ctc_mpc_alloc_channel flow will begin. | |
306 | ||
307 | MPCG_STATE_XID0IOWAIX XID2(0) negotiations are in progress. | |
308 | At least 1, but not all, XID2(0)'s | |
309 | have been received from partner. | |
310 | ||
311 | MPCG_STATE_XID7INITI XID2(0) complete | |
312 | No XID2(7)'s have yet been received. | |
313 | XID2(7) negotiations pending. | |
314 | ||
315 | MPCG_STATE_XID7INITZ XID2(7) negotiations in progress. | |
316 | At least 1, but not all, XID2(7)'s | |
317 | have been received from partner. | |
318 | ||
319 | MPCG_STATE_XID7INITF XID2(7) negotiations complete. | |
320 | Transitioning to READY. | |
321 | ||
322 | MPCG_STATE_READY Ready for Data Transfer. | |
323 | ||
324 | */ | |
325 | ||
326 | enum mpcg_events { | |
327 | MPCG_EVENT_INOP, | |
328 | MPCG_EVENT_DISCONC, | |
329 | MPCG_EVENT_XID0DO, | |
330 | MPCG_EVENT_XID2, | |
331 | MPCG_EVENT_XID2DONE, | |
332 | MPCG_EVENT_XID7DONE, | |
333 | MPCG_EVENT_TIMER, | |
334 | MPCG_EVENT_DOIO, | |
335 | MPCG_NR_EVENTS, | |
336 | }; | |
337 | ||
338 | enum mpcg_states { | |
339 | MPCG_STATE_RESET, | |
340 | MPCG_STATE_INOP, | |
341 | MPCG_STATE_XID2INITW, | |
342 | MPCG_STATE_XID2INITX, | |
343 | MPCG_STATE_XID7INITW, | |
344 | MPCG_STATE_XID7INITX, | |
345 | MPCG_STATE_XID0IOWAIT, | |
346 | MPCG_STATE_XID0IOWAIX, | |
347 | MPCG_STATE_XID7INITI, | |
348 | MPCG_STATE_XID7INITZ, | |
349 | MPCG_STATE_XID7INITF, | |
350 | MPCG_STATE_FLOWC, | |
351 | MPCG_STATE_READY, | |
352 | MPCG_NR_STATES, | |
353 | }; | |
354 | ||
355 | #endif | |
356 | /* --- This is the END my friend --- */ |