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15
16#undef DEBUG
17#undef DEBUGDATA
18#undef DEBUGCCW
19
20#define KMSG_COMPONENT "ctcm"
21#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
22
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>
46#include <asm/ccwdev.h>
47#include <asm/ccwgroup.h>
48#include <linux/bitops.h>
49#include <linux/uaccess.h>
50#include <linux/wait.h>
51#include <linux/moduleparam.h>
52#include <asm/idals.h>
53
54#include "ctcm_main.h"
55#include "ctcm_mpc.h"
56#include "ctcm_fsms.h"
57
58static 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
81static 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
89static 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
99
100
101
102
103
104
105
106static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb);
107
108
109
110
111static void mpc_action_nop(fsm_instance *fsm, int event, void *arg);
112static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg);
113static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg);
114static void mpc_action_timeout(fsm_instance *fi, int event, void *arg);
115static int mpc_validate_xid(struct mpcg_info *mpcginfo);
116static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg);
117static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg);
118static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg);
119static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg);
120static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg);
121static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg);
122
123#ifdef DEBUGDATA
124
125
126
127
128void ctcmpc_dumpit(char *buf, int len)
129{
130 __u32 ct, sw, rm, dup;
131 char *ptr, *rptr;
132 char tbuf[82], tdup[82];
133 char addr[22];
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) {
146 sprintf(addr, "%16.16llx", (__u64)rptr);
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
157 sprintf(tbuf, "%2.2llX", (__u64)*ptr);
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--;
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",
179 addr, boff, bhex, basc);
180 dup = 0;
181 strcpy(duphex, bhex);
182 } else
183 dup++;
184
185 sw = 0;
186 rm = 16;
187 }
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);
200 ctcm_pr_debug(" --- %s ---\n", tdup);
201 }
202 ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
203 addr, boff, bhex, basc);
204 } else {
205 if (dup >= 1) {
206 sprintf(tdup, "Duplicate as above to %s", addr);
207 ctcm_pr_debug(" --- %s ---\n", tdup);
208 }
209 if (dup != 0) {
210 ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
211 addr, boff, bhex, basc);
212 }
213 }
214
215 return;
216
217}
218#endif
219
220#ifdef DEBUGDATA
221
222
223
224
225
226
227void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
228{
229 __u8 *p = skb->data;
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
241 ctcm_pr_debug("dump:\n");
242 ctcm_pr_debug("skb len=%d \n", skb->len);
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;
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);
266 goto dumpdata;
267
268dumpth:
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);
275
276 }
277dumpdata:
278 if (bl > 32)
279 bl = 32;
280 ctcm_pr_debug("data: ");
281 for (i = 0; i < bl; i++)
282 ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n");
283 ctcm_pr_debug("\n");
284}
285#endif
286
287static 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 }
303 priv = dev->ml_priv;
304 if (priv == NULL) {
305 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
306 "%s(%s): dev->ml_priv is NULL",
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
319
320
321
322
323
324
325
326int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int))
327{
328 struct net_device *dev;
329 struct mpc_group *grp;
330 struct ctcm_priv *priv;
331
332 dev = ctcmpc_get_dev(port_num);
333 if (dev == NULL)
334 return 1;
335 priv = dev->ml_priv;
336 grp = priv->mpcg;
337
338 grp->allochanfunc = callback;
339 grp->port_num = port_num;
340 grp->port_persist = 1;
341
342 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
343 "%s(%s): state=%s",
344 CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
345
346 switch (fsm_getstate(grp->fsm)) {
347 case MPCG_STATE_INOP:
348
349 grp->alloc_called = 1;
350 break;
351 case MPCG_STATE_RESET:
352
353
354
355
356
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
371
372
373 grp->allocchan_callback_retries++;
374 if (grp->allocchan_callback_retries < 4) {
375 if (grp->allochanfunc)
376 grp->allochanfunc(grp->port_num,
377 grp->group_max_buflen);
378 } else {
379
380
381 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
382 grp->allocchan_callback_retries = 0;
383 }
384 break;
385 }
386
387 return 0;
388}
389EXPORT_SYMBOL(ctc_mpc_alloc_channel);
390
391
392
393
394
395void ctc_mpc_establish_connectivity(int port_num,
396 void (*callback)(int, int, int))
397{
398 struct net_device *dev;
399 struct mpc_group *grp;
400 struct ctcm_priv *priv;
401 struct channel *rch, *wch;
402
403 dev = ctcmpc_get_dev(port_num);
404 if (dev == NULL)
405 return;
406 priv = dev->ml_priv;
407 grp = priv->mpcg;
408 rch = priv->channel[CTCM_READ];
409 wch = priv->channel[CTCM_WRITE];
410
411 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
412 "%s(%s): state=%s",
413 CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
414
415 grp->estconnfunc = callback;
416 grp->port_num = port_num;
417
418 switch (fsm_getstate(grp->fsm)) {
419 case MPCG_STATE_READY:
420
421
422
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
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
440
441
442 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
443 "%s(%s): REJECTED - inactive channels",
444 CTCM_FUNTAIL, dev->name);
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
452
453
454
455 if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) ||
456 (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) {
457 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
458 "%s(%s): ABORT - PASSIVE XID",
459 CTCM_FUNTAIL, dev->name);
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 {
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);
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 {
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);
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
501 default:
502 break;
503 }
504
505done:
506 CTCM_PR_DEBUG("Exit %s()\n", __func__);
507 return;
508}
509EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
510
511
512
513
514
515void ctc_mpc_dealloc_ch(int port_num)
516{
517 struct net_device *dev;
518 struct ctcm_priv *priv;
519 struct mpc_group *grp;
520
521 dev = ctcmpc_get_dev(port_num);
522 if (dev == NULL)
523 return;
524 priv = dev->ml_priv;
525 grp = priv->mpcg;
526
527 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG,
528 "%s: %s: refcount = %d\n",
529 CTCM_FUNTAIL, dev->name, netdev_refcnt_read(dev));
530
531 fsm_deltimer(&priv->restart_timer);
532 grp->channels_terminating = 0;
533 fsm_deltimer(&grp->timer);
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);
541 return;
542}
543EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
544
545
546
547
548
549void ctc_mpc_flow_control(int port_num, int flowc)
550{
551 struct ctcm_priv *priv;
552 struct mpc_group *grp;
553 struct net_device *dev;
554 struct channel *rch;
555 int mpcg_state;
556
557 dev = ctcmpc_get_dev(port_num);
558 if (dev == NULL)
559 return;
560 priv = dev->ml_priv;
561 grp = priv->mpcg;
562
563 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
564 "%s: %s: flowc = %d",
565 CTCM_FUNTAIL, dev->name, flowc);
566
567 rch = priv->channel[CTCM_READ];
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
586
587 tasklet_schedule(&rch->ch_tasklet);
588 }
589
590 if (mpcg_state == MPCG_STATE_READY) {
591 grp->flow_off_called = 1;
592 break;
593 }
594 break;
595 }
596
597}
598EXPORT_SYMBOL(ctc_mpc_flow_control);
599
600static int mpc_send_qllc_discontact(struct net_device *);
601
602
603
604
605static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo)
606{
607 struct channel *rch = mpcginfo->ch;
608 struct net_device *dev = rch->netdev;
609 struct ctcm_priv *priv = dev->ml_priv;
610 struct mpc_group *grp = priv->mpcg;
611 struct channel *ch = priv->channel[CTCM_WRITE];
612
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);
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
635
636
637static void ctcmpc_send_sweep_resp(struct channel *rch)
638{
639 struct net_device *dev = rch->netdev;
640 struct ctcm_priv *priv = dev->ml_priv;
641 struct mpc_group *grp = priv->mpcg;
642 struct th_sweep *header;
643 struct sk_buff *sweep_skb;
644 struct channel *ch = priv->channel[CTCM_WRITE];
645
646 CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id);
647
648 sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
649 if (sweep_skb == NULL) {
650 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
651 "%s(%s): sweep_skb allocation ERROR\n",
652 CTCM_FUNTAIL, rch->id);
653 goto done;
654 }
655
656 header = kmalloc(sizeof(struct th_sweep), gfp_type());
657
658 if (!header) {
659 dev_kfree_skb_any(sweep_skb);
660 goto done;
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 skb_put_data(sweep_skb, header, TH_SWEEP_LENGTH);
671
672 kfree(header);
673
674 netif_trans_update(dev);
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
681done:
682 grp->in_sweep = 0;
683 ctcm_clear_busy_do(dev);
684 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
685
686 return;
687}
688
689
690
691
692static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo)
693{
694 struct channel *rch = mpcginfo->ch;
695 struct net_device *dev = rch->netdev;
696 struct ctcm_priv *priv = dev->ml_priv;
697 struct mpc_group *grp = priv->mpcg;
698 struct channel *ch = priv->channel[CTCM_WRITE];
699
700 if (do_debug)
701 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
702 " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id);
703
704 if (grp->in_sweep == 0) {
705 grp->in_sweep = 1;
706 ctcm_test_and_set_busy(dev);
707 grp->sweep_req_pend_num = grp->active_channels[CTCM_READ];
708 grp->sweep_rsp_pend_num = grp->active_channels[CTCM_READ];
709 }
710
711 CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
712
713 grp->sweep_req_pend_num--;
714 ctcmpc_send_sweep_resp(ch);
715 kfree(mpcginfo);
716 return;
717}
718
719
720
721
722static 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
733static 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
751
752
753static 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
821static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm);
822
823
824
825
826
827static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg)
828{
829 struct net_device *dev = arg;
830 struct ctcm_priv *priv = dev->ml_priv;
831 struct mpc_group *grp = priv->mpcg;
832
833 if (grp == NULL) {
834 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
835 "%s(%s): No MPC group",
836 CTCM_FUNTAIL, dev->name);
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;
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;
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
864 return;
865}
866
867
868
869
870
871void mpc_group_ready(unsigned long adev)
872{
873 struct net_device *dev = (struct net_device *)adev;
874 struct ctcm_priv *priv = dev->ml_priv;
875 struct mpc_group *grp = priv->mpcg;
876 struct channel *ch = NULL;
877
878 if (grp == NULL) {
879 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
880 "%s(%s): No MPC group",
881 CTCM_FUNTAIL, dev->name);
882 return;
883 }
884
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);
888
889 fsm_newstate(grp->fsm, MPCG_STATE_READY);
890
891
892 ch = priv->channel[CTCM_READ];
893 ch->pdu_seq = 0;
894 CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" ,
895 __func__, ch->pdu_seq);
896
897 ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch);
898
899 ch = priv->channel[CTCM_WRITE];
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);
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;
913 } else if (grp->allochanfunc)
914 grp->allochanfunc(grp->port_num, grp->group_max_buflen);
915
916 grp->send_qllc_disc = 1;
917 grp->changed_side = 0;
918
919 return;
920
921}
922
923
924
925
926
927void mpc_channel_action(struct channel *ch, int direction, int action)
928{
929 struct net_device *dev = ch->netdev;
930 struct ctcm_priv *priv = dev->ml_priv;
931 struct mpc_group *grp = priv->mpcg;
932
933 if (grp == NULL) {
934 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
935 "%s(%s): No MPC group",
936 CTCM_FUNTAIL, dev->name);
937 return;
938 }
939
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,
946 grp->active_channels[CTCM_READ],
947 grp->active_channels[CTCM_WRITE]);
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) {
961 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
962 "%s(%s): Couldn't alloc ch xid_skb\n",
963 CTCM_FUNTAIL, dev->name);
964 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
965 return;
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 skb_put_data(ch->xid_skb, grp->xid_skb->data,
978 grp->xid_skb->len);
979
980 ch->xid->xid2_dlc_type =
981 ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
982 ? XID2_READ_SIDE : XID2_WRITE_SIDE);
983
984 if (CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE)
985 ch->xid->xid2_buf_len = 0x00;
986
987 ch->xid_skb->data = ch->xid_skb_data;
988 skb_reset_tail_pointer(ch->xid_skb);
989 ch->xid_skb->len = 0;
990
991 fsm_newstate(ch->fsm, CH_XID0_PENDING);
992
993 if ((grp->active_channels[CTCM_READ] > 0) &&
994 (grp->active_channels[CTCM_WRITE] > 0) &&
995 (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) {
996 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
997 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE,
998 "%s: %s: MPC GROUP CHANNELS ACTIVE\n",
999 __func__, dev->name);
1000 }
1001 } else if ((action == MPC_CHANNEL_REMOVE) &&
1002 (ch->in_mpcgroup == 1)) {
1003 ch->in_mpcgroup = 0;
1004 grp->num_channel_paths--;
1005 grp->active_channels[direction]--;
1006
1007 if (ch->xid_skb != NULL)
1008 dev_kfree_skb_any(ch->xid_skb);
1009 ch->xid_skb = NULL;
1010
1011 if (grp->channels_terminating)
1012 goto done;
1013
1014 if (((grp->active_channels[CTCM_READ] == 0) &&
1015 (grp->active_channels[CTCM_WRITE] > 0))
1016 || ((grp->active_channels[CTCM_WRITE] == 0) &&
1017 (grp->active_channels[CTCM_READ] > 0)))
1018 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1019 }
1020done:
1021 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1022 "exit %s: %i / Grp:%s total_channels=%i, active_channels: "
1023 "read=%i, write=%i\n", __func__, action,
1024 fsm_getstate_str(grp->fsm), grp->num_channel_paths,
1025 grp->active_channels[CTCM_READ],
1026 grp->active_channels[CTCM_WRITE]);
1027
1028 CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id);
1029}
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb)
1040{
1041 struct net_device *dev = ch->netdev;
1042 struct ctcm_priv *priv = dev->ml_priv;
1043 struct mpc_group *grp = priv->mpcg;
1044 struct pdu *curr_pdu;
1045 struct mpcg_info *mpcginfo;
1046 struct th_header *header = NULL;
1047 struct th_sweep *sweep = NULL;
1048 int pdu_last_seen = 0;
1049 __u32 new_len;
1050 struct sk_buff *skb;
1051 int skblen;
1052 int sendrc = 0;
1053
1054 CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n",
1055 __func__, dev->name, smp_processor_id(), ch->id);
1056
1057 header = (struct th_header *)pskb->data;
1058 if ((header->th_seg == 0) &&
1059 (header->th_ch_flag == 0) &&
1060 (header->th_blk_flag == 0) &&
1061 (header->th_seq_num == 0))
1062 goto done;
1063
1064 CTCM_PR_DBGDATA("%s: th_header\n", __func__);
1065 CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH);
1066 CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len);
1067
1068 pskb->dev = dev;
1069 pskb->ip_summed = CHECKSUM_UNNECESSARY;
1070 skb_pull(pskb, TH_HEADER_LENGTH);
1071
1072 if (likely(header->th_ch_flag == TH_HAS_PDU)) {
1073 CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__);
1074 if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) ||
1075 ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) &&
1076 (header->th_seq_num != ch->th_seq_num + 1) &&
1077 (ch->th_seq_num != 0))) {
1078
1079
1080
1081
1082
1083
1084 grp->out_of_sequence += 1;
1085 __skb_push(pskb, TH_HEADER_LENGTH);
1086 skb_queue_tail(&ch->io_queue, pskb);
1087 CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x "
1088 "got:%08x\n", __func__,
1089 ch->th_seq_num + 1, header->th_seq_num);
1090
1091 return;
1092 }
1093 grp->out_of_sequence = 0;
1094 ch->th_seq_num = header->th_seq_num;
1095
1096 CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n",
1097 __func__, ch->th_seq_num);
1098
1099 if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY))
1100 goto done;
1101 while ((pskb->len > 0) && !pdu_last_seen) {
1102 curr_pdu = (struct pdu *)pskb->data;
1103
1104 CTCM_PR_DBGDATA("%s: pdu_header\n", __func__);
1105 CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH);
1106 CTCM_PR_DBGDATA("%s: pskb len: %04x \n",
1107 __func__, pskb->len);
1108
1109 skb_pull(pskb, PDU_HEADER_LENGTH);
1110
1111 if (curr_pdu->pdu_flag & PDU_LAST)
1112 pdu_last_seen = 1;
1113 if (curr_pdu->pdu_flag & PDU_CNTL)
1114 pskb->protocol = htons(ETH_P_SNAP);
1115 else
1116 pskb->protocol = htons(ETH_P_SNA_DIX);
1117
1118 if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) {
1119 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1120 "%s(%s): Dropping packet with "
1121 "illegal siize %d",
1122 CTCM_FUNTAIL, dev->name, pskb->len);
1123
1124 priv->stats.rx_dropped++;
1125 priv->stats.rx_length_errors++;
1126 goto done;
1127 }
1128 skb_reset_mac_header(pskb);
1129 new_len = curr_pdu->pdu_offset;
1130 CTCM_PR_DBGDATA("%s: new_len: %04x \n",
1131 __func__, new_len);
1132 if ((new_len == 0) || (new_len > pskb->len)) {
1133
1134
1135 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1136 "%s(%s): non valid pdu_offset: %04x",
1137
1138 CTCM_FUNTAIL, dev->name, new_len);
1139 goto done;
1140 }
1141 skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC);
1142
1143 if (!skb) {
1144 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1145 "%s(%s): MEMORY allocation error",
1146 CTCM_FUNTAIL, dev->name);
1147 priv->stats.rx_dropped++;
1148 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1149 goto done;
1150 }
1151 skb_put_data(skb, pskb->data, new_len);
1152
1153 skb_reset_mac_header(skb);
1154 skb->dev = pskb->dev;
1155 skb->protocol = pskb->protocol;
1156 skb->ip_summed = CHECKSUM_UNNECESSARY;
1157 *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq;
1158 ch->pdu_seq++;
1159
1160 if (do_debug_data) {
1161 ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n",
1162 __func__, ch->pdu_seq);
1163 ctcm_pr_debug("%s: skb:%0lx "
1164 "skb len: %d \n", __func__,
1165 (unsigned long)skb, skb->len);
1166 ctcm_pr_debug("%s: up to 32 bytes "
1167 "of pdu_data sent\n", __func__);
1168 ctcmpc_dump32((char *)skb->data, skb->len);
1169 }
1170
1171 skblen = skb->len;
1172 sendrc = netif_rx(skb);
1173 priv->stats.rx_packets++;
1174 priv->stats.rx_bytes += skblen;
1175 skb_pull(pskb, new_len);
1176 }
1177 } else {
1178 mpcginfo = kmalloc(sizeof(struct mpcg_info), gfp_type());
1179 if (mpcginfo == NULL)
1180 goto done;
1181
1182 mpcginfo->ch = ch;
1183 mpcginfo->th = header;
1184 mpcginfo->skb = pskb;
1185 CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n",
1186 __func__);
1187
1188 sweep = (struct th_sweep *)pskb->data;
1189 mpcginfo->sweep = sweep;
1190 if (header->th_ch_flag == TH_SWEEP_REQ)
1191 mpc_rcvd_sweep_req(mpcginfo);
1192 else if (header->th_ch_flag == TH_SWEEP_RESP)
1193 mpc_rcvd_sweep_resp(mpcginfo);
1194 else if (header->th_blk_flag == TH_DATA_IS_XID) {
1195 struct xid2 *thisxid = (struct xid2 *)pskb->data;
1196 skb_pull(pskb, XID2_LENGTH);
1197 mpcginfo->xid = thisxid;
1198 fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo);
1199 } else if (header->th_blk_flag == TH_DISCONTACT)
1200 fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo);
1201 else if (header->th_seq_num != 0) {
1202 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1203 "%s(%s): control pkt expected\n",
1204 CTCM_FUNTAIL, dev->name);
1205 priv->stats.rx_dropped++;
1206
1207 kfree(mpcginfo);
1208 if (do_debug_data)
1209 ctcmpc_dump_skb(pskb, -8);
1210 }
1211 }
1212done:
1213
1214 dev_kfree_skb_any(pskb);
1215 if (sendrc == NET_RX_DROP) {
1216 dev_warn(&dev->dev,
1217 "The network backlog for %s is exceeded, "
1218 "package dropped\n", __func__);
1219 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1220 }
1221
1222 CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
1223 __func__, dev->name, ch, ch->id);
1224}
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234void ctcmpc_bh(unsigned long thischan)
1235{
1236 struct channel *ch = (struct channel *)thischan;
1237 struct sk_buff *skb;
1238 struct net_device *dev = ch->netdev;
1239 struct ctcm_priv *priv = dev->ml_priv;
1240 struct mpc_group *grp = priv->mpcg;
1241
1242 CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n",
1243 dev->name, smp_processor_id(), __func__, ch->id);
1244
1245 while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) &&
1246 (skb = skb_dequeue(&ch->io_queue))) {
1247 ctcmpc_unpack_skb(ch, skb);
1248 if (grp->out_of_sequence > 20) {
1249
1250
1251
1252 grp->out_of_sequence = 0;
1253 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1254 break;
1255 }
1256 if (skb == skb_peek(&ch->io_queue))
1257 break;
1258 }
1259 CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
1260 __func__, dev->name, ch, ch->id);
1261 return;
1262}
1263
1264
1265
1266
1267struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv)
1268{
1269 struct mpc_group *grp;
1270
1271 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
1272 "Enter %s(%p)", CTCM_FUNTAIL, priv);
1273
1274 grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL);
1275 if (grp == NULL)
1276 return NULL;
1277
1278 grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names,
1279 MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm,
1280 mpcg_fsm_len, GFP_KERNEL);
1281 if (grp->fsm == NULL) {
1282 kfree(grp);
1283 return NULL;
1284 }
1285
1286 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1287 fsm_settimer(grp->fsm, &grp->timer);
1288
1289 grp->xid_skb =
1290 __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
1291 if (grp->xid_skb == NULL) {
1292 kfree_fsm(grp->fsm);
1293 kfree(grp);
1294 return NULL;
1295 }
1296
1297 grp->xid_skb_data = grp->xid_skb->data;
1298 grp->xid_th = (struct th_header *)grp->xid_skb->data;
1299 skb_put_data(grp->xid_skb, &thnorm, TH_HEADER_LENGTH);
1300
1301 grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb);
1302 skb_put_data(grp->xid_skb, &init_xid, XID2_LENGTH);
1303 grp->xid->xid2_adj_id = jiffies | 0xfff00000;
1304 grp->xid->xid2_sender_id = jiffies;
1305
1306 grp->xid_id = skb_tail_pointer(grp->xid_skb);
1307 skb_put_data(grp->xid_skb, "VTAM", 4);
1308
1309 grp->rcvd_xid_skb =
1310 __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA);
1311 if (grp->rcvd_xid_skb == NULL) {
1312 kfree_fsm(grp->fsm);
1313 dev_kfree_skb(grp->xid_skb);
1314 kfree(grp);
1315 return NULL;
1316 }
1317 grp->rcvd_xid_data = grp->rcvd_xid_skb->data;
1318 grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
1319 skb_put_data(grp->rcvd_xid_skb, &thnorm, TH_HEADER_LENGTH);
1320 grp->saved_xid2 = NULL;
1321 priv->xid = grp->xid;
1322 priv->mpcg = grp;
1323 return grp;
1324}
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338static void mpc_action_nop(fsm_instance *fi, int event, void *arg)
1339{
1340}
1341
1342
1343
1344
1345
1346
1347
1348static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg)
1349{
1350 struct net_device *dev = arg;
1351 struct ctcm_priv *priv;
1352 struct mpc_group *grp;
1353 struct channel *wch;
1354
1355 CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name);
1356
1357 priv = dev->ml_priv;
1358 grp = priv->mpcg;
1359 grp->flow_off_called = 0;
1360 fsm_deltimer(&grp->timer);
1361 if (grp->channels_terminating)
1362 return;
1363
1364 grp->channels_terminating = 1;
1365 grp->saved_state = fsm_getstate(grp->fsm);
1366 fsm_newstate(grp->fsm, MPCG_STATE_INOP);
1367 if (grp->saved_state > MPCG_STATE_XID7INITF)
1368 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1369 "%s(%s): MPC GROUP INOPERATIVE",
1370 CTCM_FUNTAIL, dev->name);
1371 if ((grp->saved_state != MPCG_STATE_RESET) ||
1372
1373 (grp->port_persist == 0))
1374 fsm_deltimer(&priv->restart_timer);
1375
1376 wch = priv->channel[CTCM_WRITE];
1377
1378 switch (grp->saved_state) {
1379 case MPCG_STATE_RESET:
1380 case MPCG_STATE_INOP:
1381 case MPCG_STATE_XID2INITW:
1382 case MPCG_STATE_XID0IOWAIT:
1383 case MPCG_STATE_XID2INITX:
1384 case MPCG_STATE_XID7INITW:
1385 case MPCG_STATE_XID7INITX:
1386 case MPCG_STATE_XID0IOWAIX:
1387 case MPCG_STATE_XID7INITI:
1388 case MPCG_STATE_XID7INITZ:
1389 case MPCG_STATE_XID7INITF:
1390 break;
1391 case MPCG_STATE_FLOWC:
1392 case MPCG_STATE_READY:
1393 default:
1394 tasklet_hi_schedule(&wch->ch_disc_tasklet);
1395 }
1396
1397 grp->xid2_tgnum = 0;
1398 grp->group_max_buflen = 0;
1399 grp->outstanding_xid2 = 0;
1400 grp->outstanding_xid7 = 0;
1401 grp->outstanding_xid7_p2 = 0;
1402 grp->saved_xid2 = NULL;
1403 grp->xidnogood = 0;
1404 grp->changed_side = 0;
1405
1406 grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
1407 skb_reset_tail_pointer(grp->rcvd_xid_skb);
1408 grp->rcvd_xid_skb->len = 0;
1409 grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
1410 skb_put_data(grp->rcvd_xid_skb, &thnorm, TH_HEADER_LENGTH);
1411
1412 if (grp->send_qllc_disc == 1) {
1413 grp->send_qllc_disc = 0;
1414 mpc_send_qllc_discontact(dev);
1415 }
1416
1417
1418
1419
1420
1421
1422 if ((grp->port_persist == 1) || (grp->alloc_called)) {
1423 grp->alloc_called = 0;
1424 fsm_deltimer(&priv->restart_timer);
1425 fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev);
1426 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1427 if (grp->saved_state > MPCG_STATE_XID7INITF)
1428 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
1429 "%s(%s): MPC GROUP RECOVERY SCHEDULED",
1430 CTCM_FUNTAIL, dev->name);
1431 } else {
1432 fsm_deltimer(&priv->restart_timer);
1433 fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev);
1434 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1435 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
1436 "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED",
1437 CTCM_FUNTAIL, dev->name);
1438 }
1439}
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450static void mpc_action_timeout(fsm_instance *fi, int event, void *arg)
1451{
1452 struct net_device *dev = arg;
1453 struct ctcm_priv *priv;
1454 struct mpc_group *grp;
1455 struct channel *wch;
1456 struct channel *rch;
1457
1458 priv = dev->ml_priv;
1459 grp = priv->mpcg;
1460 wch = priv->channel[CTCM_WRITE];
1461 rch = priv->channel[CTCM_READ];
1462
1463 switch (fsm_getstate(grp->fsm)) {
1464 case MPCG_STATE_XID2INITW:
1465
1466
1467
1468 if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) &&
1469 (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
1470 break;
1471 default:
1472 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1473 }
1474
1475 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1476 "%s: dev=%s exit",
1477 CTCM_FUNTAIL, dev->name);
1478 return;
1479}
1480
1481
1482
1483
1484
1485void mpc_action_discontact(fsm_instance *fi, int event, void *arg)
1486{
1487 struct mpcg_info *mpcginfo = arg;
1488 struct channel *ch = mpcginfo->ch;
1489 struct net_device *dev;
1490 struct ctcm_priv *priv;
1491 struct mpc_group *grp;
1492
1493 if (ch) {
1494 dev = ch->netdev;
1495 if (dev) {
1496 priv = dev->ml_priv;
1497 if (priv) {
1498 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1499 "%s: %s: %s\n",
1500 CTCM_FUNTAIL, dev->name, ch->id);
1501 grp = priv->mpcg;
1502 grp->send_qllc_disc = 1;
1503 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1504 }
1505 }
1506 }
1507
1508 return;
1509}
1510
1511
1512
1513
1514
1515
1516void mpc_action_send_discontact(unsigned long thischan)
1517{
1518 int rc;
1519 struct channel *ch = (struct channel *)thischan;
1520 unsigned long saveflags = 0;
1521
1522 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1523 rc = ccw_device_start(ch->cdev, &ch->ccw[15],
1524 (unsigned long)ch, 0xff, 0);
1525 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
1526
1527 if (rc != 0) {
1528 ctcm_ccw_check_rc(ch, rc, (char *)__func__);
1529 }
1530
1531 return;
1532}
1533
1534
1535
1536
1537
1538
1539
1540static int mpc_validate_xid(struct mpcg_info *mpcginfo)
1541{
1542 struct channel *ch = mpcginfo->ch;
1543 struct net_device *dev = ch->netdev;
1544 struct ctcm_priv *priv = dev->ml_priv;
1545 struct mpc_group *grp = priv->mpcg;
1546 struct xid2 *xid = mpcginfo->xid;
1547 int rc = 0;
1548 __u64 our_id = 0;
1549 __u64 their_id = 0;
1550 int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
1551
1552 CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid);
1553
1554 if (xid == NULL) {
1555 rc = 1;
1556
1557 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1558 "%s(%s): xid = NULL",
1559 CTCM_FUNTAIL, ch->id);
1560 goto done;
1561 }
1562
1563 CTCM_D3_DUMP((char *)xid, XID2_LENGTH);
1564
1565
1566 if (((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? XID2_WRITE_SIDE :
1567 XID2_READ_SIDE) != xid->xid2_dlc_type) {
1568 rc = 2;
1569
1570 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1571 "%s(%s): r/w channel pairing mismatch",
1572 CTCM_FUNTAIL, ch->id);
1573 goto done;
1574 }
1575
1576 if (xid->xid2_dlc_type == XID2_READ_SIDE) {
1577 CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__,
1578 grp->group_max_buflen, xid->xid2_buf_len);
1579
1580 if (grp->group_max_buflen == 0 || grp->group_max_buflen >
1581 xid->xid2_buf_len - len)
1582 grp->group_max_buflen = xid->xid2_buf_len - len;
1583 }
1584
1585 if (grp->saved_xid2 == NULL) {
1586 grp->saved_xid2 =
1587 (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb);
1588
1589 skb_put_data(grp->rcvd_xid_skb, xid, XID2_LENGTH);
1590 grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
1591
1592 skb_reset_tail_pointer(grp->rcvd_xid_skb);
1593 grp->rcvd_xid_skb->len = 0;
1594
1595
1596 our_id = (__u64)priv->xid->xid2_adj_id;
1597 our_id = our_id << 32;
1598 our_id = our_id + priv->xid->xid2_sender_id;
1599 their_id = (__u64)xid->xid2_adj_id;
1600 their_id = their_id << 32;
1601 their_id = their_id + xid->xid2_sender_id;
1602
1603 if (our_id < their_id) {
1604 grp->roll = XSIDE;
1605 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1606 "%s(%s): WE HAVE LOW ID - TAKE XSIDE",
1607 CTCM_FUNTAIL, ch->id);
1608 } else {
1609 grp->roll = YSIDE;
1610 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1611 "%s(%s): WE HAVE HIGH ID - TAKE YSIDE",
1612 CTCM_FUNTAIL, ch->id);
1613 }
1614
1615 } else {
1616 if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) {
1617 rc = 3;
1618
1619 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1620 "%s(%s): xid flag byte4 mismatch",
1621 CTCM_FUNTAIL, ch->id);
1622 }
1623 if (xid->xid2_flag2 == 0x40) {
1624 rc = 4;
1625
1626 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1627 "%s(%s): xid NOGOOD",
1628 CTCM_FUNTAIL, ch->id);
1629 }
1630 if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) {
1631 rc = 5;
1632
1633 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1634 "%s(%s): Adjacent Station ID Mismatch",
1635 CTCM_FUNTAIL, ch->id);
1636 }
1637 if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) {
1638 rc = 6;
1639
1640 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1641 "%s(%s): Sender Address Mismatch",
1642 CTCM_FUNTAIL, ch->id);
1643 }
1644 }
1645done:
1646 if (rc) {
1647 dev_warn(&dev->dev,
1648 "The XID used in the MPC protocol is not valid, "
1649 "rc = %d\n", rc);
1650 priv->xid->xid2_flag2 = 0x40;
1651 grp->saved_xid2->xid2_flag2 = 0x40;
1652 }
1653
1654 return rc;
1655}
1656
1657
1658
1659
1660
1661static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side)
1662{
1663 struct channel *ch = arg;
1664 int rc = 0;
1665 int gotlock = 0;
1666 unsigned long saveflags = 0;
1667
1668
1669 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
1670 __func__, smp_processor_id(), ch, ch->id);
1671
1672 if (ctcm_checkalloc_buffer(ch))
1673 goto done;
1674
1675
1676
1677
1678 ch->trans_skb->data = ch->trans_skb_data;
1679 skb_reset_tail_pointer(ch->trans_skb);
1680 ch->trans_skb->len = 0;
1681
1682
1683
1684
1685 memset(ch->trans_skb->data, 0, 16);
1686 ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
1687
1688 skb_put(ch->trans_skb, TH_HEADER_LENGTH);
1689 ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb);
1690
1691 skb_put(ch->trans_skb, XID2_LENGTH);
1692 ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb);
1693
1694 ch->trans_skb->data = ch->trans_skb_data;
1695 skb_reset_tail_pointer(ch->trans_skb);
1696 ch->trans_skb->len = 0;
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706 ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1707 ch->ccw[8].count = 0;
1708 ch->ccw[8].cda = 0x00;
1709
1710 if (!(ch->xid_th && ch->xid && ch->xid_id))
1711 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
1712 "%s(%s): xid_th=%p, xid=%p, xid_id=%p",
1713 CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id);
1714
1715 if (side == XSIDE) {
1716
1717 if (ch->xid_th == NULL)
1718 goto done;
1719 ch->ccw[9].cmd_code = CCW_CMD_WRITE;
1720 ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1721 ch->ccw[9].count = TH_HEADER_LENGTH;
1722 ch->ccw[9].cda = virt_to_phys(ch->xid_th);
1723
1724 if (ch->xid == NULL)
1725 goto done;
1726 ch->ccw[10].cmd_code = CCW_CMD_WRITE;
1727 ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1728 ch->ccw[10].count = XID2_LENGTH;
1729 ch->ccw[10].cda = virt_to_phys(ch->xid);
1730
1731 ch->ccw[11].cmd_code = CCW_CMD_READ;
1732 ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1733 ch->ccw[11].count = TH_HEADER_LENGTH;
1734 ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th);
1735
1736 ch->ccw[12].cmd_code = CCW_CMD_READ;
1737 ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1738 ch->ccw[12].count = XID2_LENGTH;
1739 ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid);
1740
1741 ch->ccw[13].cmd_code = CCW_CMD_READ;
1742 ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id);
1743
1744 } else {
1745 ch->ccw[9].cmd_code = CCW_CMD_READ;
1746 ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1747 ch->ccw[9].count = TH_HEADER_LENGTH;
1748 ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th);
1749
1750 ch->ccw[10].cmd_code = CCW_CMD_READ;
1751 ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1752 ch->ccw[10].count = XID2_LENGTH;
1753 ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid);
1754
1755 if (ch->xid_th == NULL)
1756 goto done;
1757 ch->ccw[11].cmd_code = CCW_CMD_WRITE;
1758 ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1759 ch->ccw[11].count = TH_HEADER_LENGTH;
1760 ch->ccw[11].cda = virt_to_phys(ch->xid_th);
1761
1762 if (ch->xid == NULL)
1763 goto done;
1764 ch->ccw[12].cmd_code = CCW_CMD_WRITE;
1765 ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1766 ch->ccw[12].count = XID2_LENGTH;
1767 ch->ccw[12].cda = virt_to_phys(ch->xid);
1768
1769 if (ch->xid_id == NULL)
1770 goto done;
1771 ch->ccw[13].cmd_code = CCW_CMD_WRITE;
1772 ch->ccw[13].cda = virt_to_phys(ch->xid_id);
1773
1774 }
1775 ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1776 ch->ccw[13].count = 4;
1777
1778 ch->ccw[14].cmd_code = CCW_CMD_NOOP;
1779 ch->ccw[14].flags = CCW_FLAG_SLI;
1780 ch->ccw[14].count = 0;
1781 ch->ccw[14].cda = 0;
1782
1783 CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7);
1784 CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH);
1785 CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH);
1786 CTCM_D3_DUMP((char *)ch->xid_id, 4);
1787
1788 if (!in_irq()) {
1789
1790
1791
1792 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1793 gotlock = 1;
1794 }
1795
1796 fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch);
1797 rc = ccw_device_start(ch->cdev, &ch->ccw[8],
1798 (unsigned long)ch, 0xff, 0);
1799
1800 if (gotlock)
1801 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
1802
1803 if (rc != 0) {
1804 ctcm_ccw_check_rc(ch, rc,
1805 (side == XSIDE) ? "x-side XID" : "y-side XID");
1806 }
1807
1808done:
1809 CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n",
1810 __func__, ch, ch->id);
1811 return;
1812
1813}
1814
1815
1816
1817
1818
1819static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg)
1820{
1821 mpc_action_side_xid(fsm, arg, XSIDE);
1822}
1823
1824
1825
1826
1827
1828static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg)
1829{
1830 mpc_action_side_xid(fsm, arg, YSIDE);
1831}
1832
1833
1834
1835
1836
1837static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg)
1838{
1839 struct channel *ch = arg;
1840 struct net_device *dev = ch->netdev;
1841 struct ctcm_priv *priv = dev->ml_priv;
1842 struct mpc_group *grp = priv->mpcg;
1843
1844 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
1845 __func__, smp_processor_id(), ch, ch->id);
1846
1847 if (ch->xid == NULL) {
1848 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1849 "%s(%s): ch->xid == NULL",
1850 CTCM_FUNTAIL, dev->name);
1851 return;
1852 }
1853
1854 fsm_newstate(ch->fsm, CH_XID0_INPROGRESS);
1855
1856 ch->xid->xid2_option = XID2_0;
1857
1858 switch (fsm_getstate(grp->fsm)) {
1859 case MPCG_STATE_XID2INITW:
1860 case MPCG_STATE_XID2INITX:
1861 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1862 break;
1863 case MPCG_STATE_XID0IOWAIT:
1864 case MPCG_STATE_XID0IOWAIX:
1865 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1866 break;
1867 }
1868
1869 fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
1870
1871 return;
1872}
1873
1874
1875
1876
1877
1878static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg)
1879{
1880 struct net_device *dev = arg;
1881 struct ctcm_priv *priv = dev->ml_priv;
1882 struct mpc_group *grp = NULL;
1883 int direction;
1884 int send = 0;
1885
1886 if (priv)
1887 grp = priv->mpcg;
1888 if (grp == NULL)
1889 return;
1890
1891 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
1892 struct channel *ch = priv->channel[direction];
1893 struct xid2 *thisxid = ch->xid;
1894 ch->xid_skb->data = ch->xid_skb_data;
1895 skb_reset_tail_pointer(ch->xid_skb);
1896 ch->xid_skb->len = 0;
1897 thisxid->xid2_option = XID2_7;
1898 send = 0;
1899
1900
1901 if (grp->outstanding_xid7_p2 > 0) {
1902 if (grp->roll == YSIDE) {
1903 if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) {
1904 fsm_newstate(ch->fsm, CH_XID7_PENDING2);
1905 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1906 skb_put_data(ch->xid_skb, &thdummy,
1907 TH_HEADER_LENGTH);
1908 send = 1;
1909 }
1910 } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) {
1911 fsm_newstate(ch->fsm, CH_XID7_PENDING2);
1912 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1913 skb_put_data(ch->xid_skb, &thnorm,
1914 TH_HEADER_LENGTH);
1915 send = 1;
1916 }
1917 } else {
1918
1919 if (grp->roll == YSIDE) {
1920 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) {
1921 fsm_newstate(ch->fsm, CH_XID7_PENDING4);
1922 skb_put_data(ch->xid_skb, &thnorm,
1923 TH_HEADER_LENGTH);
1924 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1925 send = 1;
1926 }
1927 } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) {
1928 fsm_newstate(ch->fsm, CH_XID7_PENDING4);
1929 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1930 skb_put_data(ch->xid_skb, &thdummy,
1931 TH_HEADER_LENGTH);
1932 send = 1;
1933 }
1934 }
1935
1936 if (send)
1937 fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
1938 }
1939
1940 return;
1941}
1942
1943
1944
1945
1946
1947static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg)
1948{
1949
1950 struct mpcg_info *mpcginfo = arg;
1951 struct channel *ch = mpcginfo->ch;
1952 struct net_device *dev = ch->netdev;
1953 struct ctcm_priv *priv = dev->ml_priv;
1954 struct mpc_group *grp = priv->mpcg;
1955
1956 CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n",
1957 __func__, ch->id, grp->outstanding_xid2,
1958 grp->outstanding_xid7, grp->outstanding_xid7_p2);
1959
1960 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING)
1961 fsm_newstate(ch->fsm, CH_XID7_PENDING);
1962
1963 grp->outstanding_xid2--;
1964 grp->outstanding_xid7++;
1965 grp->outstanding_xid7_p2++;
1966
1967
1968
1969 switch (fsm_getstate(grp->fsm)) {
1970 case MPCG_STATE_XID2INITW:
1971 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX);
1972 mpc_validate_xid(mpcginfo);
1973 break;
1974 case MPCG_STATE_XID0IOWAIT:
1975 fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX);
1976 mpc_validate_xid(mpcginfo);
1977 break;
1978 case MPCG_STATE_XID2INITX:
1979 if (grp->outstanding_xid2 == 0) {
1980 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW);
1981 mpc_validate_xid(mpcginfo);
1982 fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
1983 }
1984 break;
1985 case MPCG_STATE_XID0IOWAIX:
1986 if (grp->outstanding_xid2 == 0) {
1987 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI);
1988 mpc_validate_xid(mpcginfo);
1989 fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
1990 }
1991 break;
1992 }
1993 kfree(mpcginfo);
1994
1995 CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n",
1996 __func__, ch->id, grp->outstanding_xid2,
1997 grp->outstanding_xid7, grp->outstanding_xid7_p2);
1998 CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n",
1999 __func__, ch->id,
2000 fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm));
2001 return;
2002
2003}
2004
2005
2006
2007
2008
2009
2010static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg)
2011{
2012 struct mpcg_info *mpcginfo = arg;
2013 struct channel *ch = mpcginfo->ch;
2014 struct net_device *dev = ch->netdev;
2015 struct ctcm_priv *priv = dev->ml_priv;
2016 struct mpc_group *grp = priv->mpcg;
2017
2018 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
2019 __func__, smp_processor_id(), ch, ch->id);
2020 CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n",
2021 __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2);
2022
2023 grp->outstanding_xid7--;
2024 ch->xid_skb->data = ch->xid_skb_data;
2025 skb_reset_tail_pointer(ch->xid_skb);
2026 ch->xid_skb->len = 0;
2027
2028 switch (fsm_getstate(grp->fsm)) {
2029 case MPCG_STATE_XID7INITI:
2030 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ);
2031 mpc_validate_xid(mpcginfo);
2032 break;
2033 case MPCG_STATE_XID7INITW:
2034 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX);
2035 mpc_validate_xid(mpcginfo);
2036 break;
2037 case MPCG_STATE_XID7INITZ:
2038 case MPCG_STATE_XID7INITX:
2039 if (grp->outstanding_xid7 == 0) {
2040 if (grp->outstanding_xid7_p2 > 0) {
2041 grp->outstanding_xid7 =
2042 grp->outstanding_xid7_p2;
2043 grp->outstanding_xid7_p2 = 0;
2044 } else
2045 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF);
2046
2047 mpc_validate_xid(mpcginfo);
2048 fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
2049 break;
2050 }
2051 mpc_validate_xid(mpcginfo);
2052 break;
2053 }
2054 kfree(mpcginfo);
2055 return;
2056}
2057
2058
2059
2060
2061
2062static int mpc_send_qllc_discontact(struct net_device *dev)
2063{
2064 __u32 new_len = 0;
2065 struct sk_buff *skb;
2066 struct qllc *qllcptr;
2067 struct ctcm_priv *priv = dev->ml_priv;
2068 struct mpc_group *grp = priv->mpcg;
2069
2070 CTCM_PR_DEBUG("%s: GROUP STATE: %s\n",
2071 __func__, mpcg_state_names[grp->saved_state]);
2072
2073 switch (grp->saved_state) {
2074
2075
2076
2077
2078 case MPCG_STATE_XID0IOWAIT:
2079 case MPCG_STATE_XID0IOWAIX:
2080 case MPCG_STATE_XID7INITI:
2081 case MPCG_STATE_XID7INITZ:
2082 case MPCG_STATE_XID2INITW:
2083 case MPCG_STATE_XID2INITX:
2084 case MPCG_STATE_XID7INITW:
2085 case MPCG_STATE_XID7INITX:
2086 if (grp->estconnfunc) {
2087 grp->estconnfunc(grp->port_num, -1, 0);
2088 grp->estconnfunc = NULL;
2089 break;
2090 }
2091 case MPCG_STATE_FLOWC:
2092 case MPCG_STATE_READY:
2093 grp->send_qllc_disc = 2;
2094 new_len = sizeof(struct qllc);
2095 qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA);
2096 if (qllcptr == NULL) {
2097 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2098 "%s(%s): qllcptr allocation error",
2099 CTCM_FUNTAIL, dev->name);
2100 return -ENOMEM;
2101 }
2102
2103 qllcptr->qllc_address = 0xcc;
2104 qllcptr->qllc_commands = 0x03;
2105
2106 skb = __dev_alloc_skb(new_len, GFP_ATOMIC);
2107
2108 if (skb == NULL) {
2109 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2110 "%s(%s): skb allocation error",
2111 CTCM_FUNTAIL, dev->name);
2112 priv->stats.rx_dropped++;
2113 kfree(qllcptr);
2114 return -ENOMEM;
2115 }
2116
2117 skb_put_data(skb, qllcptr, new_len);
2118 kfree(qllcptr);
2119
2120 if (skb_headroom(skb) < 4) {
2121 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2122 "%s(%s): skb_headroom error",
2123 CTCM_FUNTAIL, dev->name);
2124 dev_kfree_skb_any(skb);
2125 return -ENOMEM;
2126 }
2127
2128 *((__u32 *)skb_push(skb, 4)) =
2129 priv->channel[CTCM_READ]->pdu_seq;
2130 priv->channel[CTCM_READ]->pdu_seq++;
2131 CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n",
2132 __func__, priv->channel[CTCM_READ]->pdu_seq);
2133
2134
2135
2136 priv->channel[CTCM_READ]->pdu_seq = 0x00;
2137 skb_reset_mac_header(skb);
2138 skb->dev = dev;
2139 skb->protocol = htons(ETH_P_SNAP);
2140 skb->ip_summed = CHECKSUM_UNNECESSARY;
2141
2142 CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4));
2143
2144 netif_rx(skb);
2145 break;
2146 default:
2147 break;
2148
2149 }
2150
2151 return 0;
2152}
2153
2154
2155
