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Commit | Line | Data |
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293d984f | 1 | /* |
293d984f PT |
2 | * Copyright IBM Corp. 2004, 2007 |
3 | * Authors: Belinda Thompson (belindat@us.ibm.com) | |
4 | * Andy Richter (richtera@us.ibm.com) | |
5 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
6 | */ | |
7 | ||
8 | /* | |
9 | This module exports functions to be used by CCS: | |
10 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
11 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
12 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
13 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
14 | */ | |
15 | ||
16 | #undef DEBUG | |
17 | #undef DEBUGDATA | |
18 | #undef DEBUGCCW | |
19 | ||
2a7c6f2c PT |
20 | #define KMSG_COMPONENT "ctcm" |
21 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
22 | ||
293d984f PT |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/timer.h> | |
31 | #include <linux/sched.h> | |
32 | ||
33 | #include <linux/signal.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/proc_fs.h> | |
36 | ||
37 | #include <linux/ip.h> | |
38 | #include <linux/if_arp.h> | |
39 | #include <linux/tcp.h> | |
40 | #include <linux/skbuff.h> | |
41 | #include <linux/ctype.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <net/dst.h> | |
44 | ||
45 | #include <linux/io.h> /* instead of <asm/io.h> ok ? */ | |
46 | #include <asm/ccwdev.h> | |
47 | #include <asm/ccwgroup.h> | |
48 | #include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */ | |
49 | #include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */ | |
50 | #include <linux/wait.h> | |
51 | #include <linux/moduleparam.h> | |
52 | #include <asm/idals.h> | |
53 | ||
293d984f | 54 | #include "ctcm_main.h" |
ce1f8938 | 55 | #include "ctcm_mpc.h" |
293d984f PT |
56 | #include "ctcm_fsms.h" |
57 | ||
58 | static const struct xid2 init_xid = { | |
59 | .xid2_type_id = XID_FM2, | |
60 | .xid2_len = 0x45, | |
61 | .xid2_adj_id = 0, | |
62 | .xid2_rlen = 0x31, | |
63 | .xid2_resv1 = 0, | |
64 | .xid2_flag1 = 0, | |
65 | .xid2_fmtt = 0, | |
66 | .xid2_flag4 = 0x80, | |
67 | .xid2_resv2 = 0, | |
68 | .xid2_tgnum = 0, | |
69 | .xid2_sender_id = 0, | |
70 | .xid2_flag2 = 0, | |
71 | .xid2_option = XID2_0, | |
72 | .xid2_resv3 = "\x00", | |
73 | .xid2_resv4 = 0, | |
74 | .xid2_dlc_type = XID2_READ_SIDE, | |
75 | .xid2_resv5 = 0, | |
76 | .xid2_mpc_flag = 0, | |
77 | .xid2_resv6 = 0, | |
78 | .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35), | |
79 | }; | |
80 | ||
81 | static const struct th_header thnorm = { | |
82 | .th_seg = 0x00, | |
83 | .th_ch_flag = TH_IS_XID, | |
84 | .th_blk_flag = TH_DATA_IS_XID, | |
85 | .th_is_xid = 0x01, | |
86 | .th_seq_num = 0x00000000, | |
87 | }; | |
88 | ||
89 | static const struct th_header thdummy = { | |
90 | .th_seg = 0x00, | |
91 | .th_ch_flag = 0x00, | |
92 | .th_blk_flag = TH_DATA_IS_XID, | |
93 | .th_is_xid = 0x01, | |
94 | .th_seq_num = 0x00000000, | |
95 | }; | |
96 | ||
97 | /* | |
98 | * Definition of one MPC group | |
99 | */ | |
100 | ||
101 | /* | |
102 | * Compatibility macros for busy handling | |
103 | * of network devices. | |
104 | */ | |
105 | ||
106 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb); | |
107 | ||
108 | /* | |
109 | * MPC Group state machine actions (static prototypes) | |
110 | */ | |
111 | static void mpc_action_nop(fsm_instance *fsm, int event, void *arg); | |
112 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg); | |
113 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg); | |
114 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg); | |
115 | static int mpc_validate_xid(struct mpcg_info *mpcginfo); | |
116 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg); | |
117 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg); | |
118 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg); | |
119 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg); | |
120 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg); | |
121 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg); | |
122 | ||
123 | #ifdef DEBUGDATA | |
124 | /*-------------------------------------------------------------------* | |
125 | * Dump buffer format * | |
126 | * * | |
127 | *--------------------------------------------------------------------*/ | |
128 | void ctcmpc_dumpit(char *buf, int len) | |
129 | { | |
130 | __u32 ct, sw, rm, dup; | |
131 | char *ptr, *rptr; | |
132 | char tbuf[82], tdup[82]; | |
293d984f | 133 | char addr[22]; |
293d984f PT |
134 | char boff[12]; |
135 | char bhex[82], duphex[82]; | |
136 | char basc[40]; | |
137 | ||
138 | sw = 0; | |
139 | rptr = ptr = buf; | |
140 | rm = 16; | |
141 | duphex[0] = 0x00; | |
142 | dup = 0; | |
143 | ||
144 | for (ct = 0; ct < len; ct++, ptr++, rptr++) { | |
145 | if (sw == 0) { | |
ce1f8938 | 146 | sprintf(addr, "%16.16llx", (__u64)rptr); |
293d984f PT |
147 | |
148 | sprintf(boff, "%4.4X", (__u32)ct); | |
149 | bhex[0] = '\0'; | |
150 | basc[0] = '\0'; | |
151 | } | |
152 | if ((sw == 4) || (sw == 12)) | |
153 | strcat(bhex, " "); | |
154 | if (sw == 8) | |
155 | strcat(bhex, " "); | |
156 | ||
ce1f8938 | 157 | sprintf(tbuf, "%2.2llX", (__u64)*ptr); |
293d984f PT |
158 | |
159 | tbuf[2] = '\0'; | |
160 | strcat(bhex, tbuf); | |
161 | if ((0 != isprint(*ptr)) && (*ptr >= 0x20)) | |
162 | basc[sw] = *ptr; | |
163 | else | |
164 | basc[sw] = '.'; | |
165 | ||
166 | basc[sw+1] = '\0'; | |
167 | sw++; | |
168 | rm--; | |
aa3f2cb6 PT |
169 | if (sw != 16) |
170 | continue; | |
171 | if ((strcmp(duphex, bhex)) != 0) { | |
172 | if (dup != 0) { | |
173 | sprintf(tdup, | |
174 | "Duplicate as above to %s", addr); | |
175 | ctcm_pr_debug(" --- %s ---\n", | |
176 | tdup); | |
177 | } | |
178 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", | |
293d984f | 179 | addr, boff, bhex, basc); |
aa3f2cb6 PT |
180 | dup = 0; |
181 | strcpy(duphex, bhex); | |
182 | } else | |
183 | dup++; | |
293d984f | 184 | |
aa3f2cb6 PT |
185 | sw = 0; |
186 | rm = 16; | |
293d984f PT |
187 | } /* endfor */ |
188 | ||
189 | if (sw != 0) { | |
190 | for ( ; rm > 0; rm--, sw++) { | |
191 | if ((sw == 4) || (sw == 12)) | |
192 | strcat(bhex, " "); | |
193 | if (sw == 8) | |
194 | strcat(bhex, " "); | |
195 | strcat(bhex, " "); | |
196 | strcat(basc, " "); | |
197 | } | |
198 | if (dup != 0) { | |
199 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 200 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f | 201 | } |
aa3f2cb6 PT |
202 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
203 | addr, boff, bhex, basc); | |
293d984f PT |
204 | } else { |
205 | if (dup >= 1) { | |
206 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 207 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f PT |
208 | } |
209 | if (dup != 0) { | |
aa3f2cb6 | 210 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
293d984f PT |
211 | addr, boff, bhex, basc); |
212 | } | |
213 | } | |
214 | ||
215 | return; | |
216 | ||
217 | } /* end of ctcmpc_dumpit */ | |
218 | #endif | |
219 | ||
220 | #ifdef DEBUGDATA | |
221 | /* | |
222 | * Dump header and first 16 bytes of an sk_buff for debugging purposes. | |
223 | * | |
224 | * skb The sk_buff to dump. | |
225 | * offset Offset relative to skb-data, where to start the dump. | |
226 | */ | |
227 | void ctcmpc_dump_skb(struct sk_buff *skb, int offset) | |
228 | { | |
aa3f2cb6 | 229 | __u8 *p = skb->data; |
293d984f PT |
230 | struct th_header *header; |
231 | struct pdu *pheader; | |
232 | int bl = skb->len; | |
233 | int i; | |
234 | ||
235 | if (p == NULL) | |
236 | return; | |
237 | ||
238 | p += offset; | |
239 | header = (struct th_header *)p; | |
240 | ||
aa3f2cb6 PT |
241 | ctcm_pr_debug("dump:\n"); |
242 | ctcm_pr_debug("skb len=%d \n", skb->len); | |
293d984f PT |
243 | if (skb->len > 2) { |
244 | switch (header->th_ch_flag) { | |
245 | case TH_HAS_PDU: | |
246 | break; | |
247 | case 0x00: | |
248 | case TH_IS_XID: | |
249 | if ((header->th_blk_flag == TH_DATA_IS_XID) && | |
250 | (header->th_is_xid == 0x01)) | |
251 | goto dumpth; | |
252 | case TH_SWEEP_REQ: | |
253 | goto dumpth; | |
254 | case TH_SWEEP_RESP: | |
255 | goto dumpth; | |
256 | default: | |
257 | break; | |
258 | } | |
259 | ||
260 | pheader = (struct pdu *)p; | |
aa3f2cb6 PT |
261 | ctcm_pr_debug("pdu->offset: %d hex: %04x\n", |
262 | pheader->pdu_offset, pheader->pdu_offset); | |
263 | ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag); | |
264 | ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto); | |
265 | ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq); | |
293d984f PT |
266 | goto dumpdata; |
267 | ||
268 | dumpth: | |
aa3f2cb6 PT |
269 | ctcm_pr_debug("th->seg : %02x\n", header->th_seg); |
270 | ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag); | |
271 | ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag); | |
272 | ctcm_pr_debug("th->type : %s\n", | |
273 | (header->th_is_xid) ? "DATA" : "XID"); | |
274 | ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num); | |
293d984f PT |
275 | |
276 | } | |
277 | dumpdata: | |
278 | if (bl > 32) | |
279 | bl = 32; | |
aa3f2cb6 | 280 | ctcm_pr_debug("data: "); |
293d984f | 281 | for (i = 0; i < bl; i++) |
aa3f2cb6 PT |
282 | ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n"); |
283 | ctcm_pr_debug("\n"); | |
293d984f PT |
284 | } |
285 | #endif | |
286 | ||
aa3f2cb6 PT |
287 | static struct net_device *ctcmpc_get_dev(int port_num) |
288 | { | |
289 | char device[20]; | |
290 | struct net_device *dev; | |
291 | struct ctcm_priv *priv; | |
292 | ||
293 | sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); | |
294 | ||
295 | dev = __dev_get_by_name(&init_net, device); | |
296 | ||
297 | if (dev == NULL) { | |
298 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
299 | "%s: Device not found by name: %s", | |
300 | CTCM_FUNTAIL, device); | |
301 | return NULL; | |
302 | } | |
261893d3 | 303 | priv = dev->ml_priv; |
aa3f2cb6 PT |
304 | if (priv == NULL) { |
305 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
261893d3 | 306 | "%s(%s): dev->ml_priv is NULL", |
aa3f2cb6 PT |
307 | CTCM_FUNTAIL, device); |
308 | return NULL; | |
309 | } | |
310 | if (priv->mpcg == NULL) { | |
311 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
312 | "%s(%s): priv->mpcg is NULL", | |
313 | CTCM_FUNTAIL, device); | |
314 | return NULL; | |
315 | } | |
316 | return dev; | |
317 | } | |
318 | ||
293d984f PT |
319 | /* |
320 | * ctc_mpc_alloc_channel | |
321 | * (exported interface) | |
322 | * | |
323 | * Device Initialization : | |
324 | * ACTPATH driven IO operations | |
325 | */ | |
326 | int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int)) | |
327 | { | |
293d984f PT |
328 | struct net_device *dev; |
329 | struct mpc_group *grp; | |
330 | struct ctcm_priv *priv; | |
331 | ||
aa3f2cb6 PT |
332 | dev = ctcmpc_get_dev(port_num); |
333 | if (dev == NULL) | |
293d984f | 334 | return 1; |
261893d3 | 335 | priv = dev->ml_priv; |
293d984f | 336 | grp = priv->mpcg; |
293d984f PT |
337 | |
338 | grp->allochanfunc = callback; | |
339 | grp->port_num = port_num; | |
340 | grp->port_persist = 1; | |
341 | ||
aa3f2cb6 PT |
342 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
343 | "%s(%s): state=%s", | |
344 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
345 | |
346 | switch (fsm_getstate(grp->fsm)) { | |
347 | case MPCG_STATE_INOP: | |
348 | /* Group is in the process of terminating */ | |
349 | grp->alloc_called = 1; | |
350 | break; | |
351 | case MPCG_STATE_RESET: | |
352 | /* MPC Group will transition to state */ | |
353 | /* MPCG_STATE_XID2INITW iff the minimum number */ | |
354 | /* of 1 read and 1 write channel have successfully*/ | |
355 | /* activated */ | |
356 | /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/ | |
357 | if (callback) | |
358 | grp->send_qllc_disc = 1; | |
359 | case MPCG_STATE_XID0IOWAIT: | |
360 | fsm_deltimer(&grp->timer); | |
361 | grp->outstanding_xid2 = 0; | |
362 | grp->outstanding_xid7 = 0; | |
363 | grp->outstanding_xid7_p2 = 0; | |
364 | grp->saved_xid2 = NULL; | |
365 | if (callback) | |
366 | ctcm_open(dev); | |
367 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
368 | break; | |
369 | case MPCG_STATE_READY: | |
370 | /* XID exchanges completed after PORT was activated */ | |
371 | /* Link station already active */ | |
372 | /* Maybe timing issue...retry callback */ | |
373 | grp->allocchan_callback_retries++; | |
374 | if (grp->allocchan_callback_retries < 4) { | |
375 | if (grp->allochanfunc) | |
376 | grp->allochanfunc(grp->port_num, | |
2a7c6f2c | 377 | grp->group_max_buflen); |
293d984f PT |
378 | } else { |
379 | /* there are problems...bail out */ | |
380 | /* there may be a state mismatch so restart */ | |
293d984f PT |
381 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
382 | grp->allocchan_callback_retries = 0; | |
383 | } | |
384 | break; | |
293d984f PT |
385 | } |
386 | ||
293d984f PT |
387 | return 0; |
388 | } | |
389 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
390 | ||
391 | /* | |
392 | * ctc_mpc_establish_connectivity | |
393 | * (exported interface) | |
394 | */ | |
395 | void ctc_mpc_establish_connectivity(int port_num, | |
396 | void (*callback)(int, int, int)) | |
397 | { | |
293d984f PT |
398 | struct net_device *dev; |
399 | struct mpc_group *grp; | |
400 | struct ctcm_priv *priv; | |
401 | struct channel *rch, *wch; | |
402 | ||
aa3f2cb6 PT |
403 | dev = ctcmpc_get_dev(port_num); |
404 | if (dev == NULL) | |
293d984f | 405 | return; |
261893d3 | 406 | priv = dev->ml_priv; |
aa3f2cb6 | 407 | grp = priv->mpcg; |
3c09e264 UB |
408 | rch = priv->channel[CTCM_READ]; |
409 | wch = priv->channel[CTCM_WRITE]; | |
293d984f | 410 | |
aa3f2cb6 PT |
411 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
412 | "%s(%s): state=%s", | |
413 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
414 | |
415 | grp->estconnfunc = callback; | |
416 | grp->port_num = port_num; | |
417 | ||
418 | switch (fsm_getstate(grp->fsm)) { | |
419 | case MPCG_STATE_READY: | |
420 | /* XID exchanges completed after PORT was activated */ | |
421 | /* Link station already active */ | |
422 | /* Maybe timing issue...retry callback */ | |
423 | fsm_deltimer(&grp->timer); | |
424 | grp->estconn_callback_retries++; | |
425 | if (grp->estconn_callback_retries < 4) { | |
426 | if (grp->estconnfunc) { | |
427 | grp->estconnfunc(grp->port_num, 0, | |
428 | grp->group_max_buflen); | |
429 | grp->estconnfunc = NULL; | |
430 | } | |
431 | } else { | |
432 | /* there are problems...bail out */ | |
433 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
434 | grp->estconn_callback_retries = 0; | |
435 | } | |
436 | break; | |
437 | case MPCG_STATE_INOP: | |
438 | case MPCG_STATE_RESET: | |
439 | /* MPC Group is not ready to start XID - min num of */ | |
440 | /* 1 read and 1 write channel have not been acquired*/ | |
aa3f2cb6 PT |
441 | |
442 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
443 | "%s(%s): REJECTED - inactive channels", | |
444 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
445 | if (grp->estconnfunc) { |
446 | grp->estconnfunc(grp->port_num, -1, 0); | |
447 | grp->estconnfunc = NULL; | |
448 | } | |
449 | break; | |
450 | case MPCG_STATE_XID2INITW: | |
451 | /* alloc channel was called but no XID exchange */ | |
452 | /* has occurred. initiate xside XID exchange */ | |
453 | /* make sure yside XID0 processing has not started */ | |
aa3f2cb6 | 454 | |
293d984f PT |
455 | if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) || |
456 | (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) { | |
aa3f2cb6 PT |
457 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
458 | "%s(%s): ABORT - PASSIVE XID", | |
459 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
460 | break; |
461 | } | |
462 | grp->send_qllc_disc = 1; | |
463 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT); | |
464 | fsm_deltimer(&grp->timer); | |
465 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
466 | MPCG_EVENT_TIMER, dev); | |
467 | grp->outstanding_xid7 = 0; | |
468 | grp->outstanding_xid7_p2 = 0; | |
469 | grp->saved_xid2 = NULL; | |
470 | if ((rch->in_mpcgroup) && | |
471 | (fsm_getstate(rch->fsm) == CH_XID0_PENDING)) | |
472 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch); | |
473 | else { | |
aa3f2cb6 PT |
474 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
475 | "%s(%s): RX-%s not ready for ACTIVE XID0", | |
476 | CTCM_FUNTAIL, dev->name, rch->id); | |
293d984f PT |
477 | if (grp->estconnfunc) { |
478 | grp->estconnfunc(grp->port_num, -1, 0); | |
479 | grp->estconnfunc = NULL; | |
480 | } | |
481 | fsm_deltimer(&grp->timer); | |
482 | goto done; | |
483 | } | |
484 | if ((wch->in_mpcgroup) && | |
485 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) | |
486 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch); | |
487 | else { | |
aa3f2cb6 PT |
488 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
489 | "%s(%s): WX-%s not ready for ACTIVE XID0", | |
490 | CTCM_FUNTAIL, dev->name, wch->id); | |
293d984f PT |
491 | if (grp->estconnfunc) { |
492 | grp->estconnfunc(grp->port_num, -1, 0); | |
493 | grp->estconnfunc = NULL; | |
494 | } | |
495 | fsm_deltimer(&grp->timer); | |
496 | goto done; | |
497 | } | |
498 | break; | |
499 | case MPCG_STATE_XID0IOWAIT: | |
500 | /* already in active XID negotiations */ | |
501 | default: | |
502 | break; | |
503 | } | |
504 | ||
505 | done: | |
aa3f2cb6 | 506 | CTCM_PR_DEBUG("Exit %s()\n", __func__); |
293d984f PT |
507 | return; |
508 | } | |
509 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
510 | ||
511 | /* | |
512 | * ctc_mpc_dealloc_ch | |
513 | * (exported interface) | |
514 | */ | |
515 | void ctc_mpc_dealloc_ch(int port_num) | |
516 | { | |
517 | struct net_device *dev; | |
293d984f PT |
518 | struct ctcm_priv *priv; |
519 | struct mpc_group *grp; | |
520 | ||
aa3f2cb6 PT |
521 | dev = ctcmpc_get_dev(port_num); |
522 | if (dev == NULL) | |
523 | return; | |
261893d3 | 524 | priv = dev->ml_priv; |
aa3f2cb6 | 525 | grp = priv->mpcg; |
293d984f | 526 | |
aa3f2cb6 PT |
527 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG, |
528 | "%s: %s: refcount = %d\n", | |
9fbb711e | 529 | CTCM_FUNTAIL, dev->name, netdev_refcnt_read(dev)); |
293d984f | 530 | |
293d984f | 531 | fsm_deltimer(&priv->restart_timer); |
293d984f | 532 | grp->channels_terminating = 0; |
293d984f | 533 | fsm_deltimer(&grp->timer); |
293d984f PT |
534 | grp->allochanfunc = NULL; |
535 | grp->estconnfunc = NULL; | |
536 | grp->port_persist = 0; | |
537 | grp->send_qllc_disc = 0; | |
538 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
539 | ||
540 | ctcm_close(dev); | |
293d984f PT |
541 | return; |
542 | } | |
543 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
544 | ||
545 | /* | |
546 | * ctc_mpc_flow_control | |
547 | * (exported interface) | |
548 | */ | |
549 | void ctc_mpc_flow_control(int port_num, int flowc) | |
550 | { | |
293d984f PT |
551 | struct ctcm_priv *priv; |
552 | struct mpc_group *grp; | |
553 | struct net_device *dev; | |
554 | struct channel *rch; | |
555 | int mpcg_state; | |
556 | ||
aa3f2cb6 PT |
557 | dev = ctcmpc_get_dev(port_num); |
558 | if (dev == NULL) | |
293d984f | 559 | return; |
261893d3 | 560 | priv = dev->ml_priv; |
aa3f2cb6 | 561 | grp = priv->mpcg; |
293d984f | 562 | |
aa3f2cb6 PT |
563 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
564 | "%s: %s: flowc = %d", | |
565 | CTCM_FUNTAIL, dev->name, flowc); | |
293d984f | 566 | |
3c09e264 | 567 | rch = priv->channel[CTCM_READ]; |
293d984f PT |
568 | |
569 | mpcg_state = fsm_getstate(grp->fsm); | |
570 | switch (flowc) { | |
571 | case 1: | |
572 | if (mpcg_state == MPCG_STATE_FLOWC) | |
573 | break; | |
574 | if (mpcg_state == MPCG_STATE_READY) { | |
575 | if (grp->flow_off_called == 1) | |
576 | grp->flow_off_called = 0; | |
577 | else | |
578 | fsm_newstate(grp->fsm, MPCG_STATE_FLOWC); | |
579 | break; | |
580 | } | |
581 | break; | |
582 | case 0: | |
583 | if (mpcg_state == MPCG_STATE_FLOWC) { | |
584 | fsm_newstate(grp->fsm, MPCG_STATE_READY); | |
585 | /* ensure any data that has accumulated */ | |
586 | /* on the io_queue will now be sen t */ | |
587 | tasklet_schedule(&rch->ch_tasklet); | |
588 | } | |
589 | /* possible race condition */ | |
590 | if (mpcg_state == MPCG_STATE_READY) { | |
591 | grp->flow_off_called = 1; | |
592 | break; | |
593 | } | |
594 | break; | |
595 | } | |
596 | ||
293d984f PT |
597 | } |
598 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
599 | ||
600 | static int mpc_send_qllc_discontact(struct net_device *); | |
601 | ||
602 | /* | |
603 | * helper function of ctcmpc_unpack_skb | |
604 | */ | |
605 | static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) | |
606 | { | |
607 | struct channel *rch = mpcginfo->ch; | |
608 | struct net_device *dev = rch->netdev; | |
261893d3 | 609 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 610 | struct mpc_group *grp = priv->mpcg; |
3c09e264 | 611 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f | 612 | |
aa3f2cb6 PT |
613 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
614 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); | |
293d984f PT |
615 | |
616 | grp->sweep_rsp_pend_num--; | |
617 | ||
618 | if ((grp->sweep_req_pend_num == 0) && | |
619 | (grp->sweep_rsp_pend_num == 0)) { | |
620 | fsm_deltimer(&ch->sweep_timer); | |
621 | grp->in_sweep = 0; | |
622 | rch->th_seq_num = 0x00; | |
623 | ch->th_seq_num = 0x00; | |
624 | ctcm_clear_busy_do(dev); | |
625 | } | |
626 | ||
627 | kfree(mpcginfo); | |
628 | ||
629 | return; | |
630 | ||
631 | } | |
632 | ||
633 | /* | |
634 | * helper function of mpc_rcvd_sweep_req | |
635 | * which is a helper of ctcmpc_unpack_skb | |
636 | */ | |
637 | static void ctcmpc_send_sweep_resp(struct channel *rch) | |
638 | { | |
639 | struct net_device *dev = rch->netdev; | |
261893d3 | 640 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 641 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
642 | struct th_sweep *header; |
643 | struct sk_buff *sweep_skb; | |
3c09e264 | 644 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f | 645 | |
aa3f2cb6 | 646 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id); |
293d984f | 647 | |
aa3f2cb6 | 648 | sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
293d984f | 649 | if (sweep_skb == NULL) { |
aa3f2cb6 PT |
650 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
651 | "%s(%s): sweep_skb allocation ERROR\n", | |
652 | CTCM_FUNTAIL, rch->id); | |
ff2aed7d | 653 | goto done; |
293d984f PT |
654 | } |
655 | ||
ae57b20a | 656 | header = kmalloc(sizeof(struct th_sweep), gfp_type()); |
293d984f PT |
657 | |
658 | if (!header) { | |
659 | dev_kfree_skb_any(sweep_skb); | |
ff2aed7d | 660 | goto done; |
293d984f PT |
661 | } |
662 | ||
663 | header->th.th_seg = 0x00 ; | |
664 | header->th.th_ch_flag = TH_SWEEP_RESP; | |
665 | header->th.th_blk_flag = 0x00; | |
666 | header->th.th_is_xid = 0x00; | |
667 | header->th.th_seq_num = 0x00; | |
668 | header->sw.th_last_seq = ch->th_seq_num; | |
669 | ||
670 | memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH); | |
671 | ||
672 | kfree(header); | |
673 | ||
860e9538 | 674 | netif_trans_update(dev); |
293d984f PT |
675 | skb_queue_tail(&ch->sweep_queue, sweep_skb); |
676 | ||
677 | fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch); | |
678 | ||
679 | return; | |
680 | ||
681 | done: | |
e2fc8cb4 JF |
682 | grp->in_sweep = 0; |
683 | ctcm_clear_busy_do(dev); | |
684 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
293d984f PT |
685 | |
686 | return; | |
687 | } | |
688 | ||
689 | /* | |
690 | * helper function of ctcmpc_unpack_skb | |
691 | */ | |
692 | static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo) | |
693 | { | |
694 | struct channel *rch = mpcginfo->ch; | |
695 | struct net_device *dev = rch->netdev; | |
261893d3 | 696 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 697 | struct mpc_group *grp = priv->mpcg; |
3c09e264 | 698 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f PT |
699 | |
700 | if (do_debug) | |
701 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, | |
aa3f2cb6 | 702 | " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
703 | |
704 | if (grp->in_sweep == 0) { | |
705 | grp->in_sweep = 1; | |
706 | ctcm_test_and_set_busy(dev); | |
3c09e264 UB |
707 | grp->sweep_req_pend_num = grp->active_channels[CTCM_READ]; |
708 | grp->sweep_rsp_pend_num = grp->active_channels[CTCM_READ]; | |
293d984f PT |
709 | } |
710 | ||
aa3f2cb6 | 711 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
293d984f PT |
712 | |
713 | grp->sweep_req_pend_num--; | |
714 | ctcmpc_send_sweep_resp(ch); | |
715 | kfree(mpcginfo); | |
716 | return; | |
717 | } | |
718 | ||
719 | /* | |
720 | * MPC Group Station FSM definitions | |
721 | */ | |
722 | static const char *mpcg_event_names[] = { | |
723 | [MPCG_EVENT_INOP] = "INOP Condition", | |
724 | [MPCG_EVENT_DISCONC] = "Discontact Received", | |
725 | [MPCG_EVENT_XID0DO] = "Channel Active - Start XID", | |
726 | [MPCG_EVENT_XID2] = "XID2 Received", | |
727 | [MPCG_EVENT_XID2DONE] = "XID0 Complete", | |
728 | [MPCG_EVENT_XID7DONE] = "XID7 Complete", | |
729 | [MPCG_EVENT_TIMER] = "XID Setup Timer", | |
730 | [MPCG_EVENT_DOIO] = "XID DoIO", | |
731 | }; | |
732 | ||
733 | static const char *mpcg_state_names[] = { | |
734 | [MPCG_STATE_RESET] = "Reset", | |
735 | [MPCG_STATE_INOP] = "INOP", | |
736 | [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start", | |
737 | [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete", | |
738 | [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start", | |
739 | [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete", | |
740 | [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start", | |
741 | [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete", | |
742 | [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start", | |
743 | [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ", | |
744 | [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ", | |
745 | [MPCG_STATE_FLOWC] = "FLOW CONTROL ON", | |
746 | [MPCG_STATE_READY] = "READY", | |
747 | }; | |
748 | ||
749 | /* | |
750 | * The MPC Group Station FSM | |
751 | * 22 events | |
752 | */ | |
753 | static const fsm_node mpcg_fsm[] = { | |
754 | { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
755 | { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop }, | |
756 | { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
757 | ||
758 | { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
759 | { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
760 | ||
761 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
762 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
763 | { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
764 | { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
765 | { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
766 | ||
767 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
768 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
769 | { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
770 | { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
771 | { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
772 | ||
773 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, | |
774 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
775 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
776 | { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
777 | { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
778 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
779 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
780 | ||
781 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
782 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
783 | { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
784 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
785 | { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
786 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
787 | ||
788 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
789 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
790 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
791 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
792 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
793 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
794 | ||
795 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
796 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
797 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
798 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
799 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
800 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
801 | ||
802 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, | |
803 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
804 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
805 | { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
806 | { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
807 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
808 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
809 | ||
810 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
811 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
812 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
813 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
814 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
815 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
816 | ||
817 | { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
818 | { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready }, | |
819 | }; | |
820 | ||
821 | static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm); | |
822 | ||
823 | /* | |
824 | * MPC Group Station FSM action | |
825 | * CTCM_PROTO_MPC only | |
826 | */ | |
827 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg) | |
828 | { | |
829 | struct net_device *dev = arg; | |
261893d3 | 830 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 831 | struct mpc_group *grp = priv->mpcg; |
293d984f | 832 | |
293d984f | 833 | if (grp == NULL) { |
aa3f2cb6 PT |
834 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
835 | "%s(%s): No MPC group", | |
836 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
837 | return; |
838 | } | |
839 | ||
840 | fsm_deltimer(&grp->timer); | |
841 | ||
842 | if (grp->saved_xid2->xid2_flag2 == 0x40) { | |
843 | priv->xid->xid2_flag2 = 0x00; | |
844 | if (grp->estconnfunc) { | |
845 | grp->estconnfunc(grp->port_num, 1, | |
846 | grp->group_max_buflen); | |
847 | grp->estconnfunc = NULL; | |
848 | } else if (grp->allochanfunc) | |
849 | grp->send_qllc_disc = 1; | |
aa3f2cb6 PT |
850 | |
851 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
852 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
853 | "%s(%s): fails", | |
854 | CTCM_FUNTAIL, dev->name); | |
855 | return; | |
293d984f PT |
856 | } |
857 | ||
858 | grp->port_persist = 1; | |
859 | grp->out_of_sequence = 0; | |
860 | grp->estconn_called = 0; | |
861 | ||
862 | tasklet_hi_schedule(&grp->mpc_tasklet2); | |
863 | ||
293d984f | 864 | return; |
293d984f PT |
865 | } |
866 | ||
867 | /* | |
868 | * helper of ctcm_init_netdevice | |
869 | * CTCM_PROTO_MPC only | |
870 | */ | |
871 | void mpc_group_ready(unsigned long adev) | |
872 | { | |
873 | struct net_device *dev = (struct net_device *)adev; | |
261893d3 | 874 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 875 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
876 | struct channel *ch = NULL; |
877 | ||
293d984f | 878 | if (grp == NULL) { |
aa3f2cb6 PT |
879 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
880 | "%s(%s): No MPC group", | |
881 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
882 | return; |
883 | } | |
884 | ||
aa3f2cb6 PT |
885 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
886 | "%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n", | |
887 | CTCM_FUNTAIL, dev->name, grp->group_max_buflen); | |
293d984f PT |
888 | |
889 | fsm_newstate(grp->fsm, MPCG_STATE_READY); | |
890 | ||
891 | /* Put up a read on the channel */ | |
3c09e264 | 892 | ch = priv->channel[CTCM_READ]; |
293d984f | 893 | ch->pdu_seq = 0; |
aa3f2cb6 PT |
894 | CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" , |
895 | __func__, ch->pdu_seq); | |
293d984f PT |
896 | |
897 | ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch); | |
898 | /* Put the write channel in idle state */ | |
3c09e264 | 899 | ch = priv->channel[CTCM_WRITE]; |
293d984f PT |
900 | if (ch->collect_len > 0) { |
901 | spin_lock(&ch->collect_lock); | |
902 | ctcm_purge_skb_queue(&ch->collect_queue); | |
903 | ch->collect_len = 0; | |
904 | spin_unlock(&ch->collect_lock); | |
905 | } | |
906 | ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch); | |
293d984f PT |
907 | ctcm_clear_busy(dev); |
908 | ||
909 | if (grp->estconnfunc) { | |
910 | grp->estconnfunc(grp->port_num, 0, | |
911 | grp->group_max_buflen); | |
912 | grp->estconnfunc = NULL; | |
aa3f2cb6 PT |
913 | } else if (grp->allochanfunc) |
914 | grp->allochanfunc(grp->port_num, grp->group_max_buflen); | |
293d984f PT |
915 | |
916 | grp->send_qllc_disc = 1; | |
917 | grp->changed_side = 0; | |
918 | ||
293d984f PT |
919 | return; |
920 | ||
921 | } | |
922 | ||
923 | /* | |
924 | * Increment the MPC Group Active Channel Counts | |
925 | * helper of dev_action (called from channel fsm) | |
926 | */ | |
aa3f2cb6 | 927 | void mpc_channel_action(struct channel *ch, int direction, int action) |
293d984f | 928 | { |
aa3f2cb6 | 929 | struct net_device *dev = ch->netdev; |
261893d3 | 930 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 931 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
932 | |
933 | if (grp == NULL) { | |
aa3f2cb6 PT |
934 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
935 | "%s(%s): No MPC group", | |
936 | CTCM_FUNTAIL, dev->name); | |
937 | return; | |
293d984f PT |
938 | } |
939 | ||
aa3f2cb6 PT |
940 | CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
941 | ||
942 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, | |
943 | "%s: %i / Grp:%s total_channels=%i, active_channels: " | |
944 | "read=%i, write=%i\n", __func__, action, | |
945 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, | |
3c09e264 UB |
946 | grp->active_channels[CTCM_READ], |
947 | grp->active_channels[CTCM_WRITE]); | |
293d984f PT |
948 | |
949 | if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) { | |
950 | grp->num_channel_paths++; | |
951 | grp->active_channels[direction]++; | |
952 | grp->outstanding_xid2++; | |
953 | ch->in_mpcgroup = 1; | |
954 | ||
955 | if (ch->xid_skb != NULL) | |
956 | dev_kfree_skb_any(ch->xid_skb); | |
957 | ||
958 | ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, | |
959 | GFP_ATOMIC | GFP_DMA); | |
960 | if (ch->xid_skb == NULL) { | |
aa3f2cb6 PT |
961 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
962 | "%s(%s): Couldn't alloc ch xid_skb\n", | |
963 | CTCM_FUNTAIL, dev->name); | |
293d984f | 964 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
aa3f2cb6 | 965 | return; |
293d984f PT |
966 | } |
967 | ch->xid_skb_data = ch->xid_skb->data; | |
968 | ch->xid_th = (struct th_header *)ch->xid_skb->data; | |
969 | skb_put(ch->xid_skb, TH_HEADER_LENGTH); | |
970 | ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb); | |
971 | skb_put(ch->xid_skb, XID2_LENGTH); | |
972 | ch->xid_id = skb_tail_pointer(ch->xid_skb); | |
973 | ch->xid_skb->data = ch->xid_skb_data; | |
974 | skb_reset_tail_pointer(ch->xid_skb); | |
975 | ch->xid_skb->len = 0; | |
976 | ||
977 | memcpy(skb_put(ch->xid_skb, grp->xid_skb->len), | |
978 | grp->xid_skb->data, | |
979 | grp->xid_skb->len); | |
980 | ||
3c09e264 UB |
981 | ch->xid->xid2_dlc_type = |
982 | ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) | |
293d984f PT |
983 | ? XID2_READ_SIDE : XID2_WRITE_SIDE); |
984 | ||
3c09e264 | 985 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) |
293d984f PT |
986 | ch->xid->xid2_buf_len = 0x00; |
987 | ||
988 | ch->xid_skb->data = ch->xid_skb_data; | |
989 | skb_reset_tail_pointer(ch->xid_skb); | |
990 | ch->xid_skb->len = 0; | |
991 | ||
992 | fsm_newstate(ch->fsm, CH_XID0_PENDING); | |
993 | ||
3c09e264 UB |
994 | if ((grp->active_channels[CTCM_READ] > 0) && |
995 | (grp->active_channels[CTCM_WRITE] > 0) && | |
293d984f PT |
996 | (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) { |
997 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
aa3f2cb6 PT |
998 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
999 | "%s: %s: MPC GROUP CHANNELS ACTIVE\n", | |
1000 | __func__, dev->name); | |
293d984f PT |
1001 | } |
1002 | } else if ((action == MPC_CHANNEL_REMOVE) && | |
1003 | (ch->in_mpcgroup == 1)) { | |
1004 | ch->in_mpcgroup = 0; | |
1005 | grp->num_channel_paths--; | |
1006 | grp->active_channels[direction]--; | |
1007 | ||
1008 | if (ch->xid_skb != NULL) | |
1009 | dev_kfree_skb_any(ch->xid_skb); | |
1010 | ch->xid_skb = NULL; | |
1011 | ||
1012 | if (grp->channels_terminating) | |
1013 | goto done; | |
1014 | ||
3c09e264 UB |
1015 | if (((grp->active_channels[CTCM_READ] == 0) && |
1016 | (grp->active_channels[CTCM_WRITE] > 0)) | |
1017 | || ((grp->active_channels[CTCM_WRITE] == 0) && | |
1018 | (grp->active_channels[CTCM_READ] > 0))) | |
293d984f PT |
1019 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
1020 | } | |
293d984f | 1021 | done: |
aa3f2cb6 PT |
1022 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1023 | "exit %s: %i / Grp:%s total_channels=%i, active_channels: " | |
1024 | "read=%i, write=%i\n", __func__, action, | |
1025 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, | |
3c09e264 UB |
1026 | grp->active_channels[CTCM_READ], |
1027 | grp->active_channels[CTCM_WRITE]); | |
293d984f | 1028 | |
aa3f2cb6 | 1029 | CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
1030 | } |
1031 | ||
1032 | /** | |
1033 | * Unpack a just received skb and hand it over to | |
1034 | * upper layers. | |
1035 | * special MPC version of unpack_skb. | |
1036 | * | |
1037 | * ch The channel where this skb has been received. | |
1038 | * pskb The received skb. | |
1039 | */ | |
1040 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) | |
1041 | { | |
1042 | struct net_device *dev = ch->netdev; | |
261893d3 | 1043 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1044 | struct mpc_group *grp = priv->mpcg; |
1045 | struct pdu *curr_pdu; | |
1046 | struct mpcg_info *mpcginfo; | |
1047 | struct th_header *header = NULL; | |
1048 | struct th_sweep *sweep = NULL; | |
1049 | int pdu_last_seen = 0; | |
1050 | __u32 new_len; | |
1051 | struct sk_buff *skb; | |
1052 | int skblen; | |
1053 | int sendrc = 0; | |
1054 | ||
aa3f2cb6 PT |
1055 | CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n", |
1056 | __func__, dev->name, smp_processor_id(), ch->id); | |
293d984f PT |
1057 | |
1058 | header = (struct th_header *)pskb->data; | |
1059 | if ((header->th_seg == 0) && | |
1060 | (header->th_ch_flag == 0) && | |
1061 | (header->th_blk_flag == 0) && | |
1062 | (header->th_seq_num == 0)) | |
1063 | /* nothing for us */ goto done; | |
1064 | ||
aa3f2cb6 PT |
1065 | CTCM_PR_DBGDATA("%s: th_header\n", __func__); |
1066 | CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH); | |
1067 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len); | |
293d984f PT |
1068 | |
1069 | pskb->dev = dev; | |
1070 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
1071 | skb_pull(pskb, TH_HEADER_LENGTH); | |
1072 | ||
1073 | if (likely(header->th_ch_flag == TH_HAS_PDU)) { | |
aa3f2cb6 | 1074 | CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__); |
293d984f PT |
1075 | if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) || |
1076 | ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) && | |
1077 | (header->th_seq_num != ch->th_seq_num + 1) && | |
1078 | (ch->th_seq_num != 0))) { | |
1079 | /* This is NOT the next segment * | |
1080 | * we are not the correct race winner * | |
1081 | * go away and let someone else win * | |
1082 | * BUT..this only applies if xid negot * | |
1083 | * is done * | |
1084 | */ | |
1085 | grp->out_of_sequence += 1; | |
1086 | __skb_push(pskb, TH_HEADER_LENGTH); | |
1087 | skb_queue_tail(&ch->io_queue, pskb); | |
aa3f2cb6 PT |
1088 | CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x " |
1089 | "got:%08x\n", __func__, | |
1090 | ch->th_seq_num + 1, header->th_seq_num); | |
293d984f PT |
1091 | |
1092 | return; | |
1093 | } | |
1094 | grp->out_of_sequence = 0; | |
1095 | ch->th_seq_num = header->th_seq_num; | |
1096 | ||
aa3f2cb6 PT |
1097 | CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n", |
1098 | __func__, ch->th_seq_num); | |
293d984f PT |
1099 | |
1100 | if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY)) | |
1101 | goto done; | |
293d984f PT |
1102 | while ((pskb->len > 0) && !pdu_last_seen) { |
1103 | curr_pdu = (struct pdu *)pskb->data; | |
aa3f2cb6 PT |
1104 | |
1105 | CTCM_PR_DBGDATA("%s: pdu_header\n", __func__); | |
1106 | CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH); | |
1107 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", | |
1108 | __func__, pskb->len); | |
1109 | ||
293d984f PT |
1110 | skb_pull(pskb, PDU_HEADER_LENGTH); |
1111 | ||
1112 | if (curr_pdu->pdu_flag & PDU_LAST) | |
1113 | pdu_last_seen = 1; | |
1114 | if (curr_pdu->pdu_flag & PDU_CNTL) | |
1115 | pskb->protocol = htons(ETH_P_SNAP); | |
1116 | else | |
1117 | pskb->protocol = htons(ETH_P_SNA_DIX); | |
1118 | ||
1119 | if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) { | |
aa3f2cb6 PT |
1120 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1121 | "%s(%s): Dropping packet with " | |
1122 | "illegal siize %d", | |
1123 | CTCM_FUNTAIL, dev->name, pskb->len); | |
1124 | ||
293d984f PT |
1125 | priv->stats.rx_dropped++; |
1126 | priv->stats.rx_length_errors++; | |
1127 | goto done; | |
1128 | } | |
1129 | skb_reset_mac_header(pskb); | |
1130 | new_len = curr_pdu->pdu_offset; | |
aa3f2cb6 PT |
1131 | CTCM_PR_DBGDATA("%s: new_len: %04x \n", |
1132 | __func__, new_len); | |
293d984f PT |
1133 | if ((new_len == 0) || (new_len > pskb->len)) { |
1134 | /* should never happen */ | |
1135 | /* pskb len must be hosed...bail out */ | |
aa3f2cb6 PT |
1136 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1137 | "%s(%s): non valid pdu_offset: %04x", | |
1138 | /* "data may be lost", */ | |
1139 | CTCM_FUNTAIL, dev->name, new_len); | |
1140 | goto done; | |
293d984f PT |
1141 | } |
1142 | skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC); | |
1143 | ||
1144 | if (!skb) { | |
aa3f2cb6 PT |
1145 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1146 | "%s(%s): MEMORY allocation error", | |
1147 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1148 | priv->stats.rx_dropped++; |
aa3f2cb6 | 1149 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
293d984f PT |
1150 | goto done; |
1151 | } | |
aa3f2cb6 | 1152 | memcpy(skb_put(skb, new_len), pskb->data, new_len); |
293d984f PT |
1153 | |
1154 | skb_reset_mac_header(skb); | |
1155 | skb->dev = pskb->dev; | |
1156 | skb->protocol = pskb->protocol; | |
1157 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1158 | *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq; | |
1159 | ch->pdu_seq++; | |
1160 | ||
293d984f | 1161 | if (do_debug_data) { |
aa3f2cb6 PT |
1162 | ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n", |
1163 | __func__, ch->pdu_seq); | |
1164 | ctcm_pr_debug("%s: skb:%0lx " | |
1165 | "skb len: %d \n", __func__, | |
1166 | (unsigned long)skb, skb->len); | |
1167 | ctcm_pr_debug("%s: up to 32 bytes " | |
1168 | "of pdu_data sent\n", __func__); | |
293d984f PT |
1169 | ctcmpc_dump32((char *)skb->data, skb->len); |
1170 | } | |
1171 | ||
1172 | skblen = skb->len; | |
1173 | sendrc = netif_rx(skb); | |
1174 | priv->stats.rx_packets++; | |
1175 | priv->stats.rx_bytes += skblen; | |
1176 | skb_pull(pskb, new_len); /* point to next PDU */ | |
1177 | } | |
1178 | } else { | |
ae57b20a | 1179 | mpcginfo = kmalloc(sizeof(struct mpcg_info), gfp_type()); |
293d984f PT |
1180 | if (mpcginfo == NULL) |
1181 | goto done; | |
1182 | ||
1183 | mpcginfo->ch = ch; | |
1184 | mpcginfo->th = header; | |
1185 | mpcginfo->skb = pskb; | |
aa3f2cb6 PT |
1186 | CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n", |
1187 | __func__); | |
293d984f PT |
1188 | /* it's a sweep? */ |
1189 | sweep = (struct th_sweep *)pskb->data; | |
1190 | mpcginfo->sweep = sweep; | |
1191 | if (header->th_ch_flag == TH_SWEEP_REQ) | |
1192 | mpc_rcvd_sweep_req(mpcginfo); | |
1193 | else if (header->th_ch_flag == TH_SWEEP_RESP) | |
1194 | mpc_rcvd_sweep_resp(mpcginfo); | |
1195 | else if (header->th_blk_flag == TH_DATA_IS_XID) { | |
1196 | struct xid2 *thisxid = (struct xid2 *)pskb->data; | |
1197 | skb_pull(pskb, XID2_LENGTH); | |
1198 | mpcginfo->xid = thisxid; | |
1199 | fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo); | |
1200 | } else if (header->th_blk_flag == TH_DISCONTACT) | |
1201 | fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo); | |
1202 | else if (header->th_seq_num != 0) { | |
aa3f2cb6 PT |
1203 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1204 | "%s(%s): control pkt expected\n", | |
1205 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1206 | priv->stats.rx_dropped++; |
1207 | /* mpcginfo only used for non-data transfers */ | |
1208 | kfree(mpcginfo); | |
1209 | if (do_debug_data) | |
1210 | ctcmpc_dump_skb(pskb, -8); | |
1211 | } | |
1212 | } | |
1213 | done: | |
1214 | ||
1215 | dev_kfree_skb_any(pskb); | |
1216 | if (sendrc == NET_RX_DROP) { | |
2a7c6f2c PT |
1217 | dev_warn(&dev->dev, |
1218 | "The network backlog for %s is exceeded, " | |
1219 | "package dropped\n", __func__); | |
293d984f PT |
1220 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
1221 | } | |
1222 | ||
aa3f2cb6 PT |
1223 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1224 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1225 | } |
1226 | ||
1227 | /** | |
1228 | * tasklet helper for mpc's skb unpacking. | |
1229 | * | |
1230 | * ch The channel to work on. | |
1231 | * Allow flow control back pressure to occur here. | |
1232 | * Throttling back channel can result in excessive | |
1233 | * channel inactivity and system deact of channel | |
1234 | */ | |
1235 | void ctcmpc_bh(unsigned long thischan) | |
1236 | { | |
aa3f2cb6 | 1237 | struct channel *ch = (struct channel *)thischan; |
293d984f | 1238 | struct sk_buff *skb; |
aa3f2cb6 | 1239 | struct net_device *dev = ch->netdev; |
261893d3 | 1240 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1241 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1242 | |
aa3f2cb6 PT |
1243 | CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n", |
1244 | dev->name, smp_processor_id(), __func__, ch->id); | |
293d984f PT |
1245 | /* caller has requested driver to throttle back */ |
1246 | while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) && | |
1247 | (skb = skb_dequeue(&ch->io_queue))) { | |
1248 | ctcmpc_unpack_skb(ch, skb); | |
1249 | if (grp->out_of_sequence > 20) { | |
1250 | /* assume data loss has occurred if */ | |
1251 | /* missing seq_num for extended */ | |
1252 | /* period of time */ | |
1253 | grp->out_of_sequence = 0; | |
1254 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1255 | break; | |
1256 | } | |
1257 | if (skb == skb_peek(&ch->io_queue)) | |
1258 | break; | |
1259 | } | |
aa3f2cb6 PT |
1260 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1261 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1262 | return; |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * MPC Group Initializations | |
1267 | */ | |
1268 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv) | |
1269 | { | |
1270 | struct mpc_group *grp; | |
1271 | ||
aa3f2cb6 PT |
1272 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
1273 | "Enter %s(%p)", CTCM_FUNTAIL, priv); | |
293d984f PT |
1274 | |
1275 | grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL); | |
1276 | if (grp == NULL) | |
1277 | return NULL; | |
1278 | ||
aa3f2cb6 PT |
1279 | grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names, |
1280 | MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm, | |
1281 | mpcg_fsm_len, GFP_KERNEL); | |
293d984f PT |
1282 | if (grp->fsm == NULL) { |
1283 | kfree(grp); | |
1284 | return NULL; | |
1285 | } | |
1286 | ||
1287 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); | |
1288 | fsm_settimer(grp->fsm, &grp->timer); | |
1289 | ||
1290 | grp->xid_skb = | |
1291 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); | |
1292 | if (grp->xid_skb == NULL) { | |
293d984f PT |
1293 | kfree_fsm(grp->fsm); |
1294 | kfree(grp); | |
1295 | return NULL; | |
1296 | } | |
1297 | /* base xid for all channels in group */ | |
1298 | grp->xid_skb_data = grp->xid_skb->data; | |
1299 | grp->xid_th = (struct th_header *)grp->xid_skb->data; | |
1300 | memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH), | |
1301 | &thnorm, TH_HEADER_LENGTH); | |
1302 | ||
aa3f2cb6 | 1303 | grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb); |
293d984f PT |
1304 | memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH); |
1305 | grp->xid->xid2_adj_id = jiffies | 0xfff00000; | |
1306 | grp->xid->xid2_sender_id = jiffies; | |
1307 | ||
1308 | grp->xid_id = skb_tail_pointer(grp->xid_skb); | |
1309 | memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4); | |
1310 | ||
1311 | grp->rcvd_xid_skb = | |
1312 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA); | |
1313 | if (grp->rcvd_xid_skb == NULL) { | |
293d984f PT |
1314 | kfree_fsm(grp->fsm); |
1315 | dev_kfree_skb(grp->xid_skb); | |
1316 | kfree(grp); | |
1317 | return NULL; | |
1318 | } | |
1319 | grp->rcvd_xid_data = grp->rcvd_xid_skb->data; | |
1320 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; | |
1321 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), | |
1322 | &thnorm, TH_HEADER_LENGTH); | |
1323 | grp->saved_xid2 = NULL; | |
1324 | priv->xid = grp->xid; | |
1325 | priv->mpcg = grp; | |
1326 | return grp; | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * The MPC Group Station FSM | |
1331 | */ | |
1332 | ||
1333 | /* | |
1334 | * MPC Group Station FSM actions | |
1335 | * CTCM_PROTO_MPC only | |
1336 | */ | |
1337 | ||
1338 | /** | |
1339 | * NOP action for statemachines | |
1340 | */ | |
1341 | static void mpc_action_nop(fsm_instance *fi, int event, void *arg) | |
1342 | { | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * invoked when the device transitions to dev_stopped | |
1347 | * MPC will stop each individual channel if a single XID failure | |
1348 | * occurs, or will intitiate all channels be stopped if a GROUP | |
1349 | * level failure occurs. | |
1350 | */ | |
1351 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg) | |
1352 | { | |
1353 | struct net_device *dev = arg; | |
1354 | struct ctcm_priv *priv; | |
1355 | struct mpc_group *grp; | |
ff2aed7d | 1356 | struct channel *wch; |
293d984f | 1357 | |
aa3f2cb6 | 1358 | CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name); |
293d984f | 1359 | |
261893d3 | 1360 | priv = dev->ml_priv; |
293d984f PT |
1361 | grp = priv->mpcg; |
1362 | grp->flow_off_called = 0; | |
293d984f | 1363 | fsm_deltimer(&grp->timer); |
293d984f | 1364 | if (grp->channels_terminating) |
aa3f2cb6 | 1365 | return; |
293d984f PT |
1366 | |
1367 | grp->channels_terminating = 1; | |
293d984f PT |
1368 | grp->saved_state = fsm_getstate(grp->fsm); |
1369 | fsm_newstate(grp->fsm, MPCG_STATE_INOP); | |
1370 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1371 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1372 | "%s(%s): MPC GROUP INOPERATIVE", | |
1373 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1374 | if ((grp->saved_state != MPCG_STATE_RESET) || |
1375 | /* dealloc_channel has been called */ | |
e2fc8cb4 | 1376 | (grp->port_persist == 0)) |
293d984f PT |
1377 | fsm_deltimer(&priv->restart_timer); |
1378 | ||
3c09e264 | 1379 | wch = priv->channel[CTCM_WRITE]; |
293d984f PT |
1380 | |
1381 | switch (grp->saved_state) { | |
1382 | case MPCG_STATE_RESET: | |
1383 | case MPCG_STATE_INOP: | |
1384 | case MPCG_STATE_XID2INITW: | |
1385 | case MPCG_STATE_XID0IOWAIT: | |
1386 | case MPCG_STATE_XID2INITX: | |
1387 | case MPCG_STATE_XID7INITW: | |
1388 | case MPCG_STATE_XID7INITX: | |
1389 | case MPCG_STATE_XID0IOWAIX: | |
1390 | case MPCG_STATE_XID7INITI: | |
1391 | case MPCG_STATE_XID7INITZ: | |
1392 | case MPCG_STATE_XID7INITF: | |
1393 | break; | |
1394 | case MPCG_STATE_FLOWC: | |
1395 | case MPCG_STATE_READY: | |
1396 | default: | |
1397 | tasklet_hi_schedule(&wch->ch_disc_tasklet); | |
1398 | } | |
1399 | ||
1400 | grp->xid2_tgnum = 0; | |
1401 | grp->group_max_buflen = 0; /*min of all received */ | |
1402 | grp->outstanding_xid2 = 0; | |
1403 | grp->outstanding_xid7 = 0; | |
1404 | grp->outstanding_xid7_p2 = 0; | |
1405 | grp->saved_xid2 = NULL; | |
1406 | grp->xidnogood = 0; | |
1407 | grp->changed_side = 0; | |
1408 | ||
1409 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; | |
1410 | skb_reset_tail_pointer(grp->rcvd_xid_skb); | |
1411 | grp->rcvd_xid_skb->len = 0; | |
1412 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; | |
1413 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm, | |
1414 | TH_HEADER_LENGTH); | |
1415 | ||
1416 | if (grp->send_qllc_disc == 1) { | |
1417 | grp->send_qllc_disc = 0; | |
ff2aed7d | 1418 | mpc_send_qllc_discontact(dev); |
293d984f PT |
1419 | } |
1420 | ||
1421 | /* DO NOT issue DEV_EVENT_STOP directly out of this code */ | |
1422 | /* This can result in INOP of VTAM PU due to halting of */ | |
1423 | /* outstanding IO which causes a sense to be returned */ | |
1424 | /* Only about 3 senses are allowed and then IOS/VTAM will*/ | |
aa3f2cb6 PT |
1425 | /* become unreachable without manual intervention */ |
1426 | if ((grp->port_persist == 1) || (grp->alloc_called)) { | |
293d984f PT |
1427 | grp->alloc_called = 0; |
1428 | fsm_deltimer(&priv->restart_timer); | |
aa3f2cb6 | 1429 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev); |
293d984f PT |
1430 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
1431 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1432 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1433 | "%s(%s): MPC GROUP RECOVERY SCHEDULED", | |
1434 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1435 | } else { |
1436 | fsm_deltimer(&priv->restart_timer); | |
1437 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev); | |
1438 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); | |
aa3f2cb6 PT |
1439 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1440 | "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED", | |
1441 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1442 | } |
293d984f PT |
1443 | } |
1444 | ||
1445 | /** | |
1446 | * Handle mpc group action timeout. | |
1447 | * MPC Group Station FSM action | |
1448 | * CTCM_PROTO_MPC only | |
1449 | * | |
1450 | * fi An instance of an mpc_group fsm. | |
1451 | * event The event, just happened. | |
1452 | * arg Generic pointer, casted from net_device * upon call. | |
1453 | */ | |
1454 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg) | |
1455 | { | |
1456 | struct net_device *dev = arg; | |
1457 | struct ctcm_priv *priv; | |
1458 | struct mpc_group *grp; | |
1459 | struct channel *wch; | |
1460 | struct channel *rch; | |
1461 | ||
261893d3 | 1462 | priv = dev->ml_priv; |
293d984f | 1463 | grp = priv->mpcg; |
3c09e264 UB |
1464 | wch = priv->channel[CTCM_WRITE]; |
1465 | rch = priv->channel[CTCM_READ]; | |
293d984f PT |
1466 | |
1467 | switch (fsm_getstate(grp->fsm)) { | |
1468 | case MPCG_STATE_XID2INITW: | |
1469 | /* Unless there is outstanding IO on the */ | |
1470 | /* channel just return and wait for ATTN */ | |
1471 | /* interrupt to begin XID negotiations */ | |
1472 | if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) && | |
1473 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) | |
1474 | break; | |
1475 | default: | |
1476 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1477 | } | |
1478 | ||
aa3f2cb6 PT |
1479 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1480 | "%s: dev=%s exit", | |
1481 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1482 | return; |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * MPC Group Station FSM action | |
1487 | * CTCM_PROTO_MPC only | |
1488 | */ | |
1489 | void mpc_action_discontact(fsm_instance *fi, int event, void *arg) | |
1490 | { | |
1491 | struct mpcg_info *mpcginfo = arg; | |
1492 | struct channel *ch = mpcginfo->ch; | |
aa3f2cb6 PT |
1493 | struct net_device *dev; |
1494 | struct ctcm_priv *priv; | |
1495 | struct mpc_group *grp; | |
293d984f | 1496 | |
aa3f2cb6 PT |
1497 | if (ch) { |
1498 | dev = ch->netdev; | |
1499 | if (dev) { | |
261893d3 | 1500 | priv = dev->ml_priv; |
aa3f2cb6 PT |
1501 | if (priv) { |
1502 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, | |
1503 | "%s: %s: %s\n", | |
1504 | CTCM_FUNTAIL, dev->name, ch->id); | |
1505 | grp = priv->mpcg; | |
1506 | grp->send_qllc_disc = 1; | |
1507 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1508 | } | |
1509 | } | |
293d984f PT |
1510 | } |
1511 | ||
293d984f PT |
1512 | return; |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * MPC Group Station - not part of FSM | |
1517 | * CTCM_PROTO_MPC only | |
1518 | * called from add_channel in ctcm_main.c | |
1519 | */ | |
1520 | void mpc_action_send_discontact(unsigned long thischan) | |
1521 | { | |
aa3f2cb6 PT |
1522 | int rc; |
1523 | struct channel *ch = (struct channel *)thischan; | |
1524 | unsigned long saveflags = 0; | |
293d984f PT |
1525 | |
1526 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1527 | rc = ccw_device_start(ch->cdev, &ch->ccw[15], | |
1528 | (unsigned long)ch, 0xff, 0); | |
1529 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
1530 | ||
1531 | if (rc != 0) { | |
aa3f2cb6 | 1532 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
1533 | } |
1534 | ||
293d984f PT |
1535 | return; |
1536 | } | |
1537 | ||
1538 | ||
1539 | /* | |
1540 | * helper function of mpc FSM | |
1541 | * CTCM_PROTO_MPC only | |
1542 | * mpc_action_rcvd_xid7 | |
1543 | */ | |
1544 | static int mpc_validate_xid(struct mpcg_info *mpcginfo) | |
1545 | { | |
aa3f2cb6 PT |
1546 | struct channel *ch = mpcginfo->ch; |
1547 | struct net_device *dev = ch->netdev; | |
261893d3 | 1548 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1549 | struct mpc_group *grp = priv->mpcg; |
aa3f2cb6 PT |
1550 | struct xid2 *xid = mpcginfo->xid; |
1551 | int rc = 0; | |
1552 | __u64 our_id = 0; | |
1553 | __u64 their_id = 0; | |
1554 | int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH; | |
293d984f | 1555 | |
aa3f2cb6 | 1556 | CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid); |
293d984f | 1557 | |
aa3f2cb6 | 1558 | if (xid == NULL) { |
293d984f | 1559 | rc = 1; |
aa3f2cb6 PT |
1560 | /* XID REJECTED: xid == NULL */ |
1561 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1562 | "%s(%s): xid = NULL", | |
1563 | CTCM_FUNTAIL, ch->id); | |
1564 | goto done; | |
293d984f PT |
1565 | } |
1566 | ||
aa3f2cb6 | 1567 | CTCM_D3_DUMP((char *)xid, XID2_LENGTH); |
293d984f PT |
1568 | |
1569 | /*the received direction should be the opposite of ours */ | |
3c09e264 | 1570 | if (((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? XID2_WRITE_SIDE : |
293d984f | 1571 | XID2_READ_SIDE) != xid->xid2_dlc_type) { |
aa3f2cb6 PT |
1572 | rc = 2; |
1573 | /* XID REJECTED: r/w channel pairing mismatch */ | |
1574 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1575 | "%s(%s): r/w channel pairing mismatch", | |
1576 | CTCM_FUNTAIL, ch->id); | |
1577 | goto done; | |
293d984f PT |
1578 | } |
1579 | ||
1580 | if (xid->xid2_dlc_type == XID2_READ_SIDE) { | |
aa3f2cb6 PT |
1581 | CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__, |
1582 | grp->group_max_buflen, xid->xid2_buf_len); | |
293d984f | 1583 | |
aa3f2cb6 PT |
1584 | if (grp->group_max_buflen == 0 || grp->group_max_buflen > |
1585 | xid->xid2_buf_len - len) | |
293d984f PT |
1586 | grp->group_max_buflen = xid->xid2_buf_len - len; |
1587 | } | |
1588 | ||
aa3f2cb6 | 1589 | if (grp->saved_xid2 == NULL) { |
293d984f PT |
1590 | grp->saved_xid2 = |
1591 | (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb); | |
1592 | ||
1593 | memcpy(skb_put(grp->rcvd_xid_skb, | |
1594 | XID2_LENGTH), xid, XID2_LENGTH); | |
1595 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; | |
1596 | ||
1597 | skb_reset_tail_pointer(grp->rcvd_xid_skb); | |
1598 | grp->rcvd_xid_skb->len = 0; | |
1599 | ||
1600 | /* convert two 32 bit numbers into 1 64 bit for id compare */ | |
1601 | our_id = (__u64)priv->xid->xid2_adj_id; | |
1602 | our_id = our_id << 32; | |
1603 | our_id = our_id + priv->xid->xid2_sender_id; | |
1604 | their_id = (__u64)xid->xid2_adj_id; | |
1605 | their_id = their_id << 32; | |
1606 | their_id = their_id + xid->xid2_sender_id; | |
1607 | /* lower id assume the xside role */ | |
1608 | if (our_id < their_id) { | |
1609 | grp->roll = XSIDE; | |
aa3f2cb6 PT |
1610 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1611 | "%s(%s): WE HAVE LOW ID - TAKE XSIDE", | |
1612 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1613 | } else { |
1614 | grp->roll = YSIDE; | |
aa3f2cb6 PT |
1615 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1616 | "%s(%s): WE HAVE HIGH ID - TAKE YSIDE", | |
1617 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1618 | } |
1619 | ||
1620 | } else { | |
1621 | if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) { | |
aa3f2cb6 PT |
1622 | rc = 3; |
1623 | /* XID REJECTED: xid flag byte4 mismatch */ | |
1624 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1625 | "%s(%s): xid flag byte4 mismatch", | |
1626 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1627 | } |
1628 | if (xid->xid2_flag2 == 0x40) { | |
aa3f2cb6 PT |
1629 | rc = 4; |
1630 | /* XID REJECTED - xid NOGOOD */ | |
1631 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1632 | "%s(%s): xid NOGOOD", | |
1633 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1634 | } |
1635 | if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) { | |
aa3f2cb6 PT |
1636 | rc = 5; |
1637 | /* XID REJECTED - Adjacent Station ID Mismatch */ | |
1638 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1639 | "%s(%s): Adjacent Station ID Mismatch", | |
1640 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1641 | } |
1642 | if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) { | |
aa3f2cb6 PT |
1643 | rc = 6; |
1644 | /* XID REJECTED - Sender Address Mismatch */ | |
1645 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1646 | "%s(%s): Sender Address Mismatch", | |
1647 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1648 | } |
1649 | } | |
aa3f2cb6 PT |
1650 | done: |
1651 | if (rc) { | |
2a7c6f2c PT |
1652 | dev_warn(&dev->dev, |
1653 | "The XID used in the MPC protocol is not valid, " | |
1654 | "rc = %d\n", rc); | |
293d984f PT |
1655 | priv->xid->xid2_flag2 = 0x40; |
1656 | grp->saved_xid2->xid2_flag2 = 0x40; | |
293d984f PT |
1657 | } |
1658 | ||
293d984f PT |
1659 | return rc; |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * MPC Group Station FSM action | |
1664 | * CTCM_PROTO_MPC only | |
1665 | */ | |
1666 | static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side) | |
1667 | { | |
1668 | struct channel *ch = arg; | |
293d984f PT |
1669 | int rc = 0; |
1670 | int gotlock = 0; | |
1671 | unsigned long saveflags = 0; /* avoids compiler warning with | |
aa3f2cb6 | 1672 | spin_unlock_irqrestore */ |
293d984f | 1673 | |
aa3f2cb6 PT |
1674 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1675 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1676 | |
1677 | if (ctcm_checkalloc_buffer(ch)) | |
1678 | goto done; | |
1679 | ||
aa3f2cb6 PT |
1680 | /* |
1681 | * skb data-buffer referencing: | |
1682 | */ | |
293d984f PT |
1683 | ch->trans_skb->data = ch->trans_skb_data; |
1684 | skb_reset_tail_pointer(ch->trans_skb); | |
1685 | ch->trans_skb->len = 0; | |
1686 | /* result of the previous 3 statements is NOT always | |
1687 | * already set after ctcm_checkalloc_buffer | |
1688 | * because of possible reuse of the trans_skb | |
1689 | */ | |
1690 | memset(ch->trans_skb->data, 0, 16); | |
1691 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; | |
1692 | /* check is main purpose here: */ | |
1693 | skb_put(ch->trans_skb, TH_HEADER_LENGTH); | |
1694 | ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb); | |
1695 | /* check is main purpose here: */ | |
1696 | skb_put(ch->trans_skb, XID2_LENGTH); | |
1697 | ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb); | |
1698 | /* cleanup back to startpoint */ | |
1699 | ch->trans_skb->data = ch->trans_skb_data; | |
1700 | skb_reset_tail_pointer(ch->trans_skb); | |
1701 | ch->trans_skb->len = 0; | |
1702 | ||
1703 | /* non-checking rewrite of above skb data-buffer referencing: */ | |
1704 | /* | |
1705 | memset(ch->trans_skb->data, 0, 16); | |
1706 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; | |
1707 | ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH); | |
1708 | ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH; | |
1709 | */ | |
1710 | ||
1711 | ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1712 | ch->ccw[8].count = 0; | |
1713 | ch->ccw[8].cda = 0x00; | |
1714 | ||
aa3f2cb6 PT |
1715 | if (!(ch->xid_th && ch->xid && ch->xid_id)) |
1716 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, | |
1717 | "%s(%s): xid_th=%p, xid=%p, xid_id=%p", | |
1718 | CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id); | |
1719 | ||
293d984f PT |
1720 | if (side == XSIDE) { |
1721 | /* mpc_action_xside_xid */ | |
aa3f2cb6 PT |
1722 | if (ch->xid_th == NULL) |
1723 | goto done; | |
293d984f PT |
1724 | ch->ccw[9].cmd_code = CCW_CMD_WRITE; |
1725 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1726 | ch->ccw[9].count = TH_HEADER_LENGTH; | |
1727 | ch->ccw[9].cda = virt_to_phys(ch->xid_th); | |
1728 | ||
aa3f2cb6 PT |
1729 | if (ch->xid == NULL) |
1730 | goto done; | |
293d984f PT |
1731 | ch->ccw[10].cmd_code = CCW_CMD_WRITE; |
1732 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1733 | ch->ccw[10].count = XID2_LENGTH; | |
1734 | ch->ccw[10].cda = virt_to_phys(ch->xid); | |
1735 | ||
1736 | ch->ccw[11].cmd_code = CCW_CMD_READ; | |
1737 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1738 | ch->ccw[11].count = TH_HEADER_LENGTH; | |
1739 | ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th); | |
1740 | ||
1741 | ch->ccw[12].cmd_code = CCW_CMD_READ; | |
1742 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1743 | ch->ccw[12].count = XID2_LENGTH; | |
1744 | ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid); | |
1745 | ||
1746 | ch->ccw[13].cmd_code = CCW_CMD_READ; | |
1747 | ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id); | |
1748 | ||
1749 | } else { /* side == YSIDE : mpc_action_yside_xid */ | |
1750 | ch->ccw[9].cmd_code = CCW_CMD_READ; | |
1751 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1752 | ch->ccw[9].count = TH_HEADER_LENGTH; | |
1753 | ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th); | |
1754 | ||
1755 | ch->ccw[10].cmd_code = CCW_CMD_READ; | |
1756 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1757 | ch->ccw[10].count = XID2_LENGTH; | |
1758 | ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid); | |
1759 | ||
aa3f2cb6 PT |
1760 | if (ch->xid_th == NULL) |
1761 | goto done; | |
293d984f PT |
1762 | ch->ccw[11].cmd_code = CCW_CMD_WRITE; |
1763 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1764 | ch->ccw[11].count = TH_HEADER_LENGTH; | |
1765 | ch->ccw[11].cda = virt_to_phys(ch->xid_th); | |
1766 | ||
aa3f2cb6 PT |
1767 | if (ch->xid == NULL) |
1768 | goto done; | |
293d984f PT |
1769 | ch->ccw[12].cmd_code = CCW_CMD_WRITE; |
1770 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1771 | ch->ccw[12].count = XID2_LENGTH; | |
1772 | ch->ccw[12].cda = virt_to_phys(ch->xid); | |
1773 | ||
aa3f2cb6 PT |
1774 | if (ch->xid_id == NULL) |
1775 | goto done; | |
293d984f PT |
1776 | ch->ccw[13].cmd_code = CCW_CMD_WRITE; |
1777 | ch->ccw[13].cda = virt_to_phys(ch->xid_id); | |
1778 | ||
1779 | } | |
1780 | ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1781 | ch->ccw[13].count = 4; | |
1782 | ||
1783 | ch->ccw[14].cmd_code = CCW_CMD_NOOP; | |
1784 | ch->ccw[14].flags = CCW_FLAG_SLI; | |
1785 | ch->ccw[14].count = 0; | |
1786 | ch->ccw[14].cda = 0; | |
1787 | ||
aa3f2cb6 PT |
1788 | CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7); |
1789 | CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH); | |
1790 | CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH); | |
1791 | CTCM_D3_DUMP((char *)ch->xid_id, 4); | |
293d984f | 1792 | |
293d984f PT |
1793 | if (!in_irq()) { |
1794 | /* Such conditional locking is a known problem for | |
1795 | * sparse because its static undeterministic. | |
1796 | * Warnings should be ignored here. */ | |
1797 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1798 | gotlock = 1; | |
1799 | } | |
1800 | ||
1801 | fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch); | |
1802 | rc = ccw_device_start(ch->cdev, &ch->ccw[8], | |
1803 | (unsigned long)ch, 0xff, 0); | |
1804 | ||
1805 | if (gotlock) /* see remark above about conditional locking */ | |
1806 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
1807 | ||
1808 | if (rc != 0) { | |
293d984f PT |
1809 | ctcm_ccw_check_rc(ch, rc, |
1810 | (side == XSIDE) ? "x-side XID" : "y-side XID"); | |
1811 | } | |
1812 | ||
1813 | done: | |
aa3f2cb6 PT |
1814 | CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n", |
1815 | __func__, ch, ch->id); | |
293d984f PT |
1816 | return; |
1817 | ||
1818 | } | |
1819 | ||
1820 | /* | |
1821 | * MPC Group Station FSM action | |
1822 | * CTCM_PROTO_MPC only | |
1823 | */ | |
1824 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg) | |
1825 | { | |
1826 | mpc_action_side_xid(fsm, arg, XSIDE); | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * MPC Group Station FSM action | |
1831 | * CTCM_PROTO_MPC only | |
1832 | */ | |
1833 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg) | |
1834 | { | |
1835 | mpc_action_side_xid(fsm, arg, YSIDE); | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * MPC Group Station FSM action | |
1840 | * CTCM_PROTO_MPC only | |
1841 | */ | |
1842 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg) | |
1843 | { | |
aa3f2cb6 PT |
1844 | struct channel *ch = arg; |
1845 | struct net_device *dev = ch->netdev; | |
261893d3 | 1846 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1847 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1848 | |
aa3f2cb6 PT |
1849 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1850 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1851 | |
1852 | if (ch->xid == NULL) { | |
aa3f2cb6 PT |
1853 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1854 | "%s(%s): ch->xid == NULL", | |
1855 | CTCM_FUNTAIL, dev->name); | |
1856 | return; | |
293d984f PT |
1857 | } |
1858 | ||
1859 | fsm_newstate(ch->fsm, CH_XID0_INPROGRESS); | |
1860 | ||
1861 | ch->xid->xid2_option = XID2_0; | |
1862 | ||
1863 | switch (fsm_getstate(grp->fsm)) { | |
1864 | case MPCG_STATE_XID2INITW: | |
1865 | case MPCG_STATE_XID2INITX: | |
1866 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1867 | break; | |
1868 | case MPCG_STATE_XID0IOWAIT: | |
1869 | case MPCG_STATE_XID0IOWAIX: | |
1870 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1871 | break; | |
1872 | } | |
1873 | ||
1874 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1875 | ||
293d984f | 1876 | return; |
293d984f PT |
1877 | } |
1878 | ||
1879 | /* | |
1880 | * MPC Group Station FSM action | |
1881 | * CTCM_PROTO_MPC only | |
1882 | */ | |
1883 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg) | |
1884 | { | |
1885 | struct net_device *dev = arg; | |
261893d3 | 1886 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1887 | struct mpc_group *grp = NULL; |
293d984f | 1888 | int direction; |
293d984f PT |
1889 | int send = 0; |
1890 | ||
aa3f2cb6 PT |
1891 | if (priv) |
1892 | grp = priv->mpcg; | |
e2fc8cb4 | 1893 | if (grp == NULL) |
aa3f2cb6 | 1894 | return; |
293d984f | 1895 | |
3c09e264 | 1896 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
1897 | struct channel *ch = priv->channel[direction]; |
1898 | struct xid2 *thisxid = ch->xid; | |
1899 | ch->xid_skb->data = ch->xid_skb_data; | |
1900 | skb_reset_tail_pointer(ch->xid_skb); | |
1901 | ch->xid_skb->len = 0; | |
1902 | thisxid->xid2_option = XID2_7; | |
1903 | send = 0; | |
1904 | ||
1905 | /* xid7 phase 1 */ | |
1906 | if (grp->outstanding_xid7_p2 > 0) { | |
1907 | if (grp->roll == YSIDE) { | |
1908 | if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) { | |
1909 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); | |
1910 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1911 | memcpy(skb_put(ch->xid_skb, | |
1912 | TH_HEADER_LENGTH), | |
1913 | &thdummy, TH_HEADER_LENGTH); | |
1914 | send = 1; | |
1915 | } | |
1916 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) { | |
1917 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); | |
1918 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1919 | memcpy(skb_put(ch->xid_skb, | |
1920 | TH_HEADER_LENGTH), | |
1921 | &thnorm, TH_HEADER_LENGTH); | |
1922 | send = 1; | |
1923 | } | |
1924 | } else { | |
1925 | /* xid7 phase 2 */ | |
1926 | if (grp->roll == YSIDE) { | |
1927 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) { | |
1928 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); | |
1929 | memcpy(skb_put(ch->xid_skb, | |
1930 | TH_HEADER_LENGTH), | |
1931 | &thnorm, TH_HEADER_LENGTH); | |
1932 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1933 | send = 1; | |
1934 | } | |
1935 | } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) { | |
1936 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); | |
1937 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1938 | memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH), | |
1939 | &thdummy, TH_HEADER_LENGTH); | |
1940 | send = 1; | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | if (send) | |
1945 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1946 | } | |
1947 | ||
293d984f PT |
1948 | return; |
1949 | } | |
1950 | ||
1951 | /* | |
1952 | * MPC Group Station FSM action | |
1953 | * CTCM_PROTO_MPC only | |
1954 | */ | |
1955 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) | |
1956 | { | |
1957 | ||
aa3f2cb6 PT |
1958 | struct mpcg_info *mpcginfo = arg; |
1959 | struct channel *ch = mpcginfo->ch; | |
1960 | struct net_device *dev = ch->netdev; | |
261893d3 | 1961 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1962 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1963 | |
aa3f2cb6 PT |
1964 | CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n", |
1965 | __func__, ch->id, grp->outstanding_xid2, | |
1966 | grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
293d984f PT |
1967 | |
1968 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING) | |
1969 | fsm_newstate(ch->fsm, CH_XID7_PENDING); | |
1970 | ||
1971 | grp->outstanding_xid2--; | |
1972 | grp->outstanding_xid7++; | |
1973 | grp->outstanding_xid7_p2++; | |
1974 | ||
1975 | /* must change state before validating xid to */ | |
1976 | /* properly handle interim interrupts received*/ | |
1977 | switch (fsm_getstate(grp->fsm)) { | |
1978 | case MPCG_STATE_XID2INITW: | |
1979 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX); | |
1980 | mpc_validate_xid(mpcginfo); | |
1981 | break; | |
1982 | case MPCG_STATE_XID0IOWAIT: | |
1983 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX); | |
1984 | mpc_validate_xid(mpcginfo); | |
1985 | break; | |
1986 | case MPCG_STATE_XID2INITX: | |
1987 | if (grp->outstanding_xid2 == 0) { | |
1988 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW); | |
1989 | mpc_validate_xid(mpcginfo); | |
1990 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); | |
1991 | } | |
1992 | break; | |
1993 | case MPCG_STATE_XID0IOWAIX: | |
1994 | if (grp->outstanding_xid2 == 0) { | |
1995 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI); | |
1996 | mpc_validate_xid(mpcginfo); | |
1997 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); | |
1998 | } | |
1999 | break; | |
2000 | } | |
2001 | kfree(mpcginfo); | |
2002 | ||
aa3f2cb6 PT |
2003 | CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n", |
2004 | __func__, ch->id, grp->outstanding_xid2, | |
2005 | grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
2006 | CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n", | |
2007 | __func__, ch->id, | |
2008 | fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm)); | |
293d984f PT |
2009 | return; |
2010 | ||
2011 | } | |
2012 | ||
2013 | ||
2014 | /* | |
2015 | * MPC Group Station FSM action | |
2016 | * CTCM_PROTO_MPC only | |
2017 | */ | |
2018 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) | |
2019 | { | |
2020 | struct mpcg_info *mpcginfo = arg; | |
2021 | struct channel *ch = mpcginfo->ch; | |
2022 | struct net_device *dev = ch->netdev; | |
261893d3 | 2023 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2024 | struct mpc_group *grp = priv->mpcg; |
2025 | ||
aa3f2cb6 PT |
2026 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
2027 | __func__, smp_processor_id(), ch, ch->id); | |
2028 | CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n", | |
2029 | __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
293d984f PT |
2030 | |
2031 | grp->outstanding_xid7--; | |
2032 | ch->xid_skb->data = ch->xid_skb_data; | |
2033 | skb_reset_tail_pointer(ch->xid_skb); | |
2034 | ch->xid_skb->len = 0; | |
2035 | ||
2036 | switch (fsm_getstate(grp->fsm)) { | |
2037 | case MPCG_STATE_XID7INITI: | |
2038 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ); | |
2039 | mpc_validate_xid(mpcginfo); | |
2040 | break; | |
2041 | case MPCG_STATE_XID7INITW: | |
2042 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX); | |
2043 | mpc_validate_xid(mpcginfo); | |
2044 | break; | |
2045 | case MPCG_STATE_XID7INITZ: | |
2046 | case MPCG_STATE_XID7INITX: | |
2047 | if (grp->outstanding_xid7 == 0) { | |
2048 | if (grp->outstanding_xid7_p2 > 0) { | |
2049 | grp->outstanding_xid7 = | |
2050 | grp->outstanding_xid7_p2; | |
2051 | grp->outstanding_xid7_p2 = 0; | |
2052 | } else | |
2053 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF); | |
2054 | ||
2055 | mpc_validate_xid(mpcginfo); | |
2056 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
2057 | break; | |
2058 | } | |
2059 | mpc_validate_xid(mpcginfo); | |
2060 | break; | |
2061 | } | |
293d984f | 2062 | kfree(mpcginfo); |
293d984f | 2063 | return; |
293d984f PT |
2064 | } |
2065 | ||
2066 | /* | |
2067 | * mpc_action helper of an MPC Group Station FSM action | |
2068 | * CTCM_PROTO_MPC only | |
2069 | */ | |
2070 | static int mpc_send_qllc_discontact(struct net_device *dev) | |
2071 | { | |
293d984f PT |
2072 | __u32 new_len = 0; |
2073 | struct sk_buff *skb; | |
2074 | struct qllc *qllcptr; | |
261893d3 | 2075 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2076 | struct mpc_group *grp = priv->mpcg; |
293d984f | 2077 | |
aa3f2cb6 PT |
2078 | CTCM_PR_DEBUG("%s: GROUP STATE: %s\n", |
2079 | __func__, mpcg_state_names[grp->saved_state]); | |
293d984f PT |
2080 | |
2081 | switch (grp->saved_state) { | |
2082 | /* | |
2083 | * establish conn callback function is | |
2084 | * preferred method to report failure | |
2085 | */ | |
2086 | case MPCG_STATE_XID0IOWAIT: | |
2087 | case MPCG_STATE_XID0IOWAIX: | |
2088 | case MPCG_STATE_XID7INITI: | |
2089 | case MPCG_STATE_XID7INITZ: | |
2090 | case MPCG_STATE_XID2INITW: | |
2091 | case MPCG_STATE_XID2INITX: | |
2092 | case MPCG_STATE_XID7INITW: | |
2093 | case MPCG_STATE_XID7INITX: | |
2094 | if (grp->estconnfunc) { | |
2095 | grp->estconnfunc(grp->port_num, -1, 0); | |
2096 | grp->estconnfunc = NULL; | |
2097 | break; | |
2098 | } | |
2099 | case MPCG_STATE_FLOWC: | |
2100 | case MPCG_STATE_READY: | |
2101 | grp->send_qllc_disc = 2; | |
2102 | new_len = sizeof(struct qllc); | |
2103 | qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA); | |
2104 | if (qllcptr == NULL) { | |
aa3f2cb6 PT |
2105 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2106 | "%s(%s): qllcptr allocation error", | |
2107 | CTCM_FUNTAIL, dev->name); | |
2108 | return -ENOMEM; | |
293d984f PT |
2109 | } |
2110 | ||
2111 | qllcptr->qllc_address = 0xcc; | |
2112 | qllcptr->qllc_commands = 0x03; | |
2113 | ||
2114 | skb = __dev_alloc_skb(new_len, GFP_ATOMIC); | |
2115 | ||
2116 | if (skb == NULL) { | |
aa3f2cb6 PT |
2117 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2118 | "%s(%s): skb allocation error", | |
2119 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2120 | priv->stats.rx_dropped++; |
293d984f | 2121 | kfree(qllcptr); |
aa3f2cb6 | 2122 | return -ENOMEM; |
293d984f PT |
2123 | } |
2124 | ||
2125 | memcpy(skb_put(skb, new_len), qllcptr, new_len); | |
2126 | kfree(qllcptr); | |
2127 | ||
2128 | if (skb_headroom(skb) < 4) { | |
aa3f2cb6 PT |
2129 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2130 | "%s(%s): skb_headroom error", | |
2131 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2132 | dev_kfree_skb_any(skb); |
aa3f2cb6 | 2133 | return -ENOMEM; |
293d984f PT |
2134 | } |
2135 | ||
3c09e264 UB |
2136 | *((__u32 *)skb_push(skb, 4)) = |
2137 | priv->channel[CTCM_READ]->pdu_seq; | |
2138 | priv->channel[CTCM_READ]->pdu_seq++; | |
aa3f2cb6 | 2139 | CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n", |
3c09e264 | 2140 | __func__, priv->channel[CTCM_READ]->pdu_seq); |
293d984f PT |
2141 | |
2142 | /* receipt of CC03 resets anticipated sequence number on | |
2143 | receiving side */ | |
3c09e264 | 2144 | priv->channel[CTCM_READ]->pdu_seq = 0x00; |
293d984f PT |
2145 | skb_reset_mac_header(skb); |
2146 | skb->dev = dev; | |
2147 | skb->protocol = htons(ETH_P_SNAP); | |
2148 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2149 | ||
aa3f2cb6 | 2150 | CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4)); |
293d984f PT |
2151 | |
2152 | netif_rx(skb); | |
2153 | break; | |
2154 | default: | |
2155 | break; | |
2156 | ||
2157 | } | |
2158 | ||
aa3f2cb6 | 2159 | return 0; |
293d984f PT |
2160 | } |
2161 | /* --- This is the END my friend --- */ | |
2162 |