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)
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);
20 #define KMSG_COMPONENT "ctcm"
21 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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>
33 #include <linux/signal.h>
34 #include <linux/string.h>
35 #include <linux/proc_fs.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>
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>
54 #include "ctcm_main.h"
56 #include "ctcm_fsms.h"
58 static const struct xid2 init_xid = {
59 .xid2_type_id = XID_FM2,
71 .xid2_option = XID2_0,
74 .xid2_dlc_type = XID2_READ_SIDE,
78 .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35),
81 static const struct th_header thnorm = {
83 .th_ch_flag = TH_IS_XID,
84 .th_blk_flag = TH_DATA_IS_XID,
86 .th_seq_num = 0x00000000,
89 static const struct th_header thdummy = {
92 .th_blk_flag = TH_DATA_IS_XID,
94 .th_seq_num = 0x00000000,
98 * Definition of one MPC group
102 * Compatibility macros for busy handling
103 * of network devices.
106 static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb);
109 * MPC Group state machine actions (static prototypes)
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);
124 /*-------------------------------------------------------------------*
125 * Dump buffer format *
127 *--------------------------------------------------------------------*/
128 void ctcmpc_dumpit(char *buf, int len)
130 __u32 ct, sw, rm, dup;
132 char tbuf[82], tdup[82];
139 char bhex[82], duphex[82];
148 for (ct = 0; ct < len; ct++, ptr++, rptr++) {
151 sprintf(addr, "%16.16llx", (__u64)rptr);
153 sprintf(addr, "%8.8X", (__u32)rptr);
156 sprintf(boff, "%4.4X", (__u32)ct);
160 if ((sw == 4) || (sw == 12))
166 sprintf(tbuf, "%2.2llX", (__u64)*ptr);
168 sprintf(tbuf, "%2.2X", (__u32)*ptr);
173 if ((0 != isprint(*ptr)) && (*ptr >= 0x20))
183 if ((strcmp(duphex, bhex)) != 0) {
186 "Duplicate as above to %s", addr);
187 ctcm_pr_debug(" --- %s ---\n",
190 ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
191 addr, boff, bhex, basc);
193 strcpy(duphex, bhex);
202 for ( ; rm > 0; rm--, sw++) {
203 if ((sw == 4) || (sw == 12))
211 sprintf(tdup, "Duplicate as above to %s", addr);
212 ctcm_pr_debug(" --- %s ---\n", tdup);
214 ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
215 addr, boff, bhex, basc);
218 sprintf(tdup, "Duplicate as above to %s", addr);
219 ctcm_pr_debug(" --- %s ---\n", tdup);
222 ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
223 addr, boff, bhex, basc);
229 } /* end of ctcmpc_dumpit */
234 * Dump header and first 16 bytes of an sk_buff for debugging purposes.
236 * skb The sk_buff to dump.
237 * offset Offset relative to skb-data, where to start the dump.
239 void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
242 struct th_header *header;
251 header = (struct th_header *)p;
253 ctcm_pr_debug("dump:\n");
254 ctcm_pr_debug("skb len=%d \n", skb->len);
256 switch (header->th_ch_flag) {
261 if ((header->th_blk_flag == TH_DATA_IS_XID) &&
262 (header->th_is_xid == 0x01))
272 pheader = (struct pdu *)p;
273 ctcm_pr_debug("pdu->offset: %d hex: %04x\n",
274 pheader->pdu_offset, pheader->pdu_offset);
275 ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag);
276 ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto);
277 ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq);
281 ctcm_pr_debug("th->seg : %02x\n", header->th_seg);
282 ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag);
283 ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag);
284 ctcm_pr_debug("th->type : %s\n",
285 (header->th_is_xid) ? "DATA" : "XID");
286 ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num);
292 ctcm_pr_debug("data: ");
293 for (i = 0; i < bl; i++)
294 ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n");
299 static struct net_device *ctcmpc_get_dev(int port_num)
302 struct net_device *dev;
303 struct ctcm_priv *priv;
305 sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
307 dev = __dev_get_by_name(&init_net, device);
310 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
311 "%s: Device not found by name: %s",
312 CTCM_FUNTAIL, device);
317 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
318 "%s(%s): dev->ml_priv is NULL",
319 CTCM_FUNTAIL, device);
322 if (priv->mpcg == NULL) {
323 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
324 "%s(%s): priv->mpcg is NULL",
325 CTCM_FUNTAIL, device);
332 * ctc_mpc_alloc_channel
333 * (exported interface)
335 * Device Initialization :
336 * ACTPATH driven IO operations
338 int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int))
340 struct net_device *dev;
341 struct mpc_group *grp;
342 struct ctcm_priv *priv;
344 dev = ctcmpc_get_dev(port_num);
350 grp->allochanfunc = callback;
351 grp->port_num = port_num;
352 grp->port_persist = 1;
354 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
356 CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
358 switch (fsm_getstate(grp->fsm)) {
359 case MPCG_STATE_INOP:
360 /* Group is in the process of terminating */
361 grp->alloc_called = 1;
363 case MPCG_STATE_RESET:
364 /* MPC Group will transition to state */
365 /* MPCG_STATE_XID2INITW iff the minimum number */
366 /* of 1 read and 1 write channel have successfully*/
368 /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/
370 grp->send_qllc_disc = 1;
371 case MPCG_STATE_XID0IOWAIT:
372 fsm_deltimer(&grp->timer);
373 grp->outstanding_xid2 = 0;
374 grp->outstanding_xid7 = 0;
375 grp->outstanding_xid7_p2 = 0;
376 grp->saved_xid2 = NULL;
379 fsm_event(priv->fsm, DEV_EVENT_START, dev);
381 case MPCG_STATE_READY:
382 /* XID exchanges completed after PORT was activated */
383 /* Link station already active */
384 /* Maybe timing issue...retry callback */
385 grp->allocchan_callback_retries++;
386 if (grp->allocchan_callback_retries < 4) {
387 if (grp->allochanfunc)
388 grp->allochanfunc(grp->port_num,
389 grp->group_max_buflen);
391 /* there are problems...bail out */
392 /* there may be a state mismatch so restart */
393 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
394 grp->allocchan_callback_retries = 0;
401 EXPORT_SYMBOL(ctc_mpc_alloc_channel);
404 * ctc_mpc_establish_connectivity
405 * (exported interface)
407 void ctc_mpc_establish_connectivity(int port_num,
408 void (*callback)(int, int, int))
410 struct net_device *dev;
411 struct mpc_group *grp;
412 struct ctcm_priv *priv;
413 struct channel *rch, *wch;
415 dev = ctcmpc_get_dev(port_num);
420 rch = priv->channel[CTCM_READ];
421 wch = priv->channel[CTCM_WRITE];
423 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
425 CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
427 grp->estconnfunc = callback;
428 grp->port_num = port_num;
430 switch (fsm_getstate(grp->fsm)) {
431 case MPCG_STATE_READY:
432 /* XID exchanges completed after PORT was activated */
433 /* Link station already active */
434 /* Maybe timing issue...retry callback */
435 fsm_deltimer(&grp->timer);
436 grp->estconn_callback_retries++;
437 if (grp->estconn_callback_retries < 4) {
438 if (grp->estconnfunc) {
439 grp->estconnfunc(grp->port_num, 0,
440 grp->group_max_buflen);
441 grp->estconnfunc = NULL;
444 /* there are problems...bail out */
445 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
446 grp->estconn_callback_retries = 0;
449 case MPCG_STATE_INOP:
450 case MPCG_STATE_RESET:
451 /* MPC Group is not ready to start XID - min num of */
452 /* 1 read and 1 write channel have not been acquired*/
454 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
455 "%s(%s): REJECTED - inactive channels",
456 CTCM_FUNTAIL, dev->name);
457 if (grp->estconnfunc) {
458 grp->estconnfunc(grp->port_num, -1, 0);
459 grp->estconnfunc = NULL;
462 case MPCG_STATE_XID2INITW:
463 /* alloc channel was called but no XID exchange */
464 /* has occurred. initiate xside XID exchange */
465 /* make sure yside XID0 processing has not started */
467 if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) ||
468 (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) {
469 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
470 "%s(%s): ABORT - PASSIVE XID",
471 CTCM_FUNTAIL, dev->name);
474 grp->send_qllc_disc = 1;
475 fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT);
476 fsm_deltimer(&grp->timer);
477 fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
478 MPCG_EVENT_TIMER, dev);
479 grp->outstanding_xid7 = 0;
480 grp->outstanding_xid7_p2 = 0;
481 grp->saved_xid2 = NULL;
482 if ((rch->in_mpcgroup) &&
483 (fsm_getstate(rch->fsm) == CH_XID0_PENDING))
484 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch);
486 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
487 "%s(%s): RX-%s not ready for ACTIVE XID0",
488 CTCM_FUNTAIL, dev->name, rch->id);
489 if (grp->estconnfunc) {
490 grp->estconnfunc(grp->port_num, -1, 0);
491 grp->estconnfunc = NULL;
493 fsm_deltimer(&grp->timer);
496 if ((wch->in_mpcgroup) &&
497 (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
498 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch);
500 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
501 "%s(%s): WX-%s not ready for ACTIVE XID0",
502 CTCM_FUNTAIL, dev->name, wch->id);
503 if (grp->estconnfunc) {
504 grp->estconnfunc(grp->port_num, -1, 0);
505 grp->estconnfunc = NULL;
507 fsm_deltimer(&grp->timer);
511 case MPCG_STATE_XID0IOWAIT:
512 /* already in active XID negotiations */
518 CTCM_PR_DEBUG("Exit %s()\n", __func__);
521 EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
525 * (exported interface)
527 void ctc_mpc_dealloc_ch(int port_num)
529 struct net_device *dev;
530 struct ctcm_priv *priv;
531 struct mpc_group *grp;
533 dev = ctcmpc_get_dev(port_num);
539 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG,
540 "%s: %s: refcount = %d\n",
541 CTCM_FUNTAIL, dev->name, netdev_refcnt_read(dev));
543 fsm_deltimer(&priv->restart_timer);
544 grp->channels_terminating = 0;
545 fsm_deltimer(&grp->timer);
546 grp->allochanfunc = NULL;
547 grp->estconnfunc = NULL;
548 grp->port_persist = 0;
549 grp->send_qllc_disc = 0;
550 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
555 EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
558 * ctc_mpc_flow_control
559 * (exported interface)
561 void ctc_mpc_flow_control(int port_num, int flowc)
563 struct ctcm_priv *priv;
564 struct mpc_group *grp;
565 struct net_device *dev;
569 dev = ctcmpc_get_dev(port_num);
575 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
576 "%s: %s: flowc = %d",
577 CTCM_FUNTAIL, dev->name, flowc);
579 rch = priv->channel[CTCM_READ];
581 mpcg_state = fsm_getstate(grp->fsm);
584 if (mpcg_state == MPCG_STATE_FLOWC)
586 if (mpcg_state == MPCG_STATE_READY) {
587 if (grp->flow_off_called == 1)
588 grp->flow_off_called = 0;
590 fsm_newstate(grp->fsm, MPCG_STATE_FLOWC);
595 if (mpcg_state == MPCG_STATE_FLOWC) {
596 fsm_newstate(grp->fsm, MPCG_STATE_READY);
597 /* ensure any data that has accumulated */
598 /* on the io_queue will now be sen t */
599 tasklet_schedule(&rch->ch_tasklet);
601 /* possible race condition */
602 if (mpcg_state == MPCG_STATE_READY) {
603 grp->flow_off_called = 1;
610 EXPORT_SYMBOL(ctc_mpc_flow_control);
612 static int mpc_send_qllc_discontact(struct net_device *);
615 * helper function of ctcmpc_unpack_skb
617 static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo)
619 struct channel *rch = mpcginfo->ch;
620 struct net_device *dev = rch->netdev;
621 struct ctcm_priv *priv = dev->ml_priv;
622 struct mpc_group *grp = priv->mpcg;
623 struct channel *ch = priv->channel[CTCM_WRITE];
625 CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id);
626 CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
628 grp->sweep_rsp_pend_num--;
630 if ((grp->sweep_req_pend_num == 0) &&
631 (grp->sweep_rsp_pend_num == 0)) {
632 fsm_deltimer(&ch->sweep_timer);
634 rch->th_seq_num = 0x00;
635 ch->th_seq_num = 0x00;
636 ctcm_clear_busy_do(dev);
646 * helper function of mpc_rcvd_sweep_req
647 * which is a helper of ctcmpc_unpack_skb
649 static void ctcmpc_send_sweep_resp(struct channel *rch)
651 struct net_device *dev = rch->netdev;
652 struct ctcm_priv *priv = dev->ml_priv;
653 struct mpc_group *grp = priv->mpcg;
654 struct th_sweep *header;
655 struct sk_buff *sweep_skb;
656 struct channel *ch = priv->channel[CTCM_WRITE];
658 CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id);
660 sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
661 if (sweep_skb == NULL) {
662 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
663 "%s(%s): sweep_skb allocation ERROR\n",
664 CTCM_FUNTAIL, rch->id);
668 header = kmalloc(sizeof(struct th_sweep), gfp_type());
671 dev_kfree_skb_any(sweep_skb);
675 header->th.th_seg = 0x00 ;
676 header->th.th_ch_flag = TH_SWEEP_RESP;
677 header->th.th_blk_flag = 0x00;
678 header->th.th_is_xid = 0x00;
679 header->th.th_seq_num = 0x00;
680 header->sw.th_last_seq = ch->th_seq_num;
682 memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH);
686 dev->trans_start = jiffies;
687 skb_queue_tail(&ch->sweep_queue, sweep_skb);
689 fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch);
695 ctcm_clear_busy_do(dev);
696 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
702 * helper function of ctcmpc_unpack_skb
704 static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo)
706 struct channel *rch = mpcginfo->ch;
707 struct net_device *dev = rch->netdev;
708 struct ctcm_priv *priv = dev->ml_priv;
709 struct mpc_group *grp = priv->mpcg;
710 struct channel *ch = priv->channel[CTCM_WRITE];
713 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
714 " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id);
716 if (grp->in_sweep == 0) {
718 ctcm_test_and_set_busy(dev);
719 grp->sweep_req_pend_num = grp->active_channels[CTCM_READ];
720 grp->sweep_rsp_pend_num = grp->active_channels[CTCM_READ];
723 CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
725 grp->sweep_req_pend_num--;
726 ctcmpc_send_sweep_resp(ch);
732 * MPC Group Station FSM definitions
734 static const char *mpcg_event_names[] = {
735 [MPCG_EVENT_INOP] = "INOP Condition",
736 [MPCG_EVENT_DISCONC] = "Discontact Received",
737 [MPCG_EVENT_XID0DO] = "Channel Active - Start XID",
738 [MPCG_EVENT_XID2] = "XID2 Received",
739 [MPCG_EVENT_XID2DONE] = "XID0 Complete",
740 [MPCG_EVENT_XID7DONE] = "XID7 Complete",
741 [MPCG_EVENT_TIMER] = "XID Setup Timer",
742 [MPCG_EVENT_DOIO] = "XID DoIO",
745 static const char *mpcg_state_names[] = {
746 [MPCG_STATE_RESET] = "Reset",
747 [MPCG_STATE_INOP] = "INOP",
748 [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start",
749 [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete",
750 [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start",
751 [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete",
752 [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start",
753 [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete",
754 [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start",
755 [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ",
756 [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ",
757 [MPCG_STATE_FLOWC] = "FLOW CONTROL ON",
758 [MPCG_STATE_READY] = "READY",
762 * The MPC Group Station FSM
765 static const fsm_node mpcg_fsm[] = {
766 { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop },
767 { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop },
768 { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop },
770 { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact },
771 { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop },
773 { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
774 { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
775 { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
776 { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
777 { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
779 { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
780 { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
781 { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
782 { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
783 { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
785 { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
786 { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact },
787 { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
788 { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
789 { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
790 { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
791 { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
793 { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact },
794 { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
795 { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
796 { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
797 { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
798 { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
800 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
801 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact },
802 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
803 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop },
804 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout },
805 { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid },
807 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
808 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact },
809 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
810 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop },
811 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout },
812 { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid },
814 { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
815 { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
816 { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact },
817 { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop },
818 { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout },
819 { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
820 { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid },
822 { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
823 { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
824 { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact },
825 { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop },
826 { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout },
827 { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid },
829 { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop },
830 { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready },
833 static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm);
836 * MPC Group Station FSM action
837 * CTCM_PROTO_MPC only
839 static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg)
841 struct net_device *dev = arg;
842 struct ctcm_priv *priv = dev->ml_priv;
843 struct mpc_group *grp = priv->mpcg;
846 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
847 "%s(%s): No MPC group",
848 CTCM_FUNTAIL, dev->name);
852 fsm_deltimer(&grp->timer);
854 if (grp->saved_xid2->xid2_flag2 == 0x40) {
855 priv->xid->xid2_flag2 = 0x00;
856 if (grp->estconnfunc) {
857 grp->estconnfunc(grp->port_num, 1,
858 grp->group_max_buflen);
859 grp->estconnfunc = NULL;
860 } else if (grp->allochanfunc)
861 grp->send_qllc_disc = 1;
863 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
864 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
866 CTCM_FUNTAIL, dev->name);
870 grp->port_persist = 1;
871 grp->out_of_sequence = 0;
872 grp->estconn_called = 0;
874 tasklet_hi_schedule(&grp->mpc_tasklet2);
880 * helper of ctcm_init_netdevice
881 * CTCM_PROTO_MPC only
883 void mpc_group_ready(unsigned long adev)
885 struct net_device *dev = (struct net_device *)adev;
886 struct ctcm_priv *priv = dev->ml_priv;
887 struct mpc_group *grp = priv->mpcg;
888 struct channel *ch = NULL;
891 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
892 "%s(%s): No MPC group",
893 CTCM_FUNTAIL, dev->name);
897 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE,
898 "%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n",
899 CTCM_FUNTAIL, dev->name, grp->group_max_buflen);
901 fsm_newstate(grp->fsm, MPCG_STATE_READY);
903 /* Put up a read on the channel */
904 ch = priv->channel[CTCM_READ];
906 CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" ,
907 __func__, ch->pdu_seq);
909 ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch);
910 /* Put the write channel in idle state */
911 ch = priv->channel[CTCM_WRITE];
912 if (ch->collect_len > 0) {
913 spin_lock(&ch->collect_lock);
914 ctcm_purge_skb_queue(&ch->collect_queue);
916 spin_unlock(&ch->collect_lock);
918 ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch);
919 ctcm_clear_busy(dev);
921 if (grp->estconnfunc) {
922 grp->estconnfunc(grp->port_num, 0,
923 grp->group_max_buflen);
924 grp->estconnfunc = NULL;
925 } else if (grp->allochanfunc)
926 grp->allochanfunc(grp->port_num, grp->group_max_buflen);
928 grp->send_qllc_disc = 1;
929 grp->changed_side = 0;
936 * Increment the MPC Group Active Channel Counts
937 * helper of dev_action (called from channel fsm)
939 void mpc_channel_action(struct channel *ch, int direction, int action)
941 struct net_device *dev = ch->netdev;
942 struct ctcm_priv *priv = dev->ml_priv;
943 struct mpc_group *grp = priv->mpcg;
946 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
947 "%s(%s): No MPC group",
948 CTCM_FUNTAIL, dev->name);
952 CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id);
954 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
955 "%s: %i / Grp:%s total_channels=%i, active_channels: "
956 "read=%i, write=%i\n", __func__, action,
957 fsm_getstate_str(grp->fsm), grp->num_channel_paths,
958 grp->active_channels[CTCM_READ],
959 grp->active_channels[CTCM_WRITE]);
961 if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) {
962 grp->num_channel_paths++;
963 grp->active_channels[direction]++;
964 grp->outstanding_xid2++;
967 if (ch->xid_skb != NULL)
968 dev_kfree_skb_any(ch->xid_skb);
970 ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT,
971 GFP_ATOMIC | GFP_DMA);
972 if (ch->xid_skb == NULL) {
973 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
974 "%s(%s): Couldn't alloc ch xid_skb\n",
975 CTCM_FUNTAIL, dev->name);
976 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
979 ch->xid_skb_data = ch->xid_skb->data;
980 ch->xid_th = (struct th_header *)ch->xid_skb->data;
981 skb_put(ch->xid_skb, TH_HEADER_LENGTH);
982 ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb);
983 skb_put(ch->xid_skb, XID2_LENGTH);
984 ch->xid_id = skb_tail_pointer(ch->xid_skb);
985 ch->xid_skb->data = ch->xid_skb_data;
986 skb_reset_tail_pointer(ch->xid_skb);
987 ch->xid_skb->len = 0;
989 memcpy(skb_put(ch->xid_skb, grp->xid_skb->len),
993 ch->xid->xid2_dlc_type =
994 ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
995 ? XID2_READ_SIDE : XID2_WRITE_SIDE);
997 if (CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE)
998 ch->xid->xid2_buf_len = 0x00;
1000 ch->xid_skb->data = ch->xid_skb_data;
1001 skb_reset_tail_pointer(ch->xid_skb);
1002 ch->xid_skb->len = 0;
1004 fsm_newstate(ch->fsm, CH_XID0_PENDING);
1006 if ((grp->active_channels[CTCM_READ] > 0) &&
1007 (grp->active_channels[CTCM_WRITE] > 0) &&
1008 (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) {
1009 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
1010 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE,
1011 "%s: %s: MPC GROUP CHANNELS ACTIVE\n",
1012 __func__, dev->name);
1014 } else if ((action == MPC_CHANNEL_REMOVE) &&
1015 (ch->in_mpcgroup == 1)) {
1016 ch->in_mpcgroup = 0;
1017 grp->num_channel_paths--;
1018 grp->active_channels[direction]--;
1020 if (ch->xid_skb != NULL)
1021 dev_kfree_skb_any(ch->xid_skb);
1024 if (grp->channels_terminating)
1027 if (((grp->active_channels[CTCM_READ] == 0) &&
1028 (grp->active_channels[CTCM_WRITE] > 0))
1029 || ((grp->active_channels[CTCM_WRITE] == 0) &&
1030 (grp->active_channels[CTCM_READ] > 0)))
1031 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1034 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1035 "exit %s: %i / Grp:%s total_channels=%i, active_channels: "
1036 "read=%i, write=%i\n", __func__, action,
1037 fsm_getstate_str(grp->fsm), grp->num_channel_paths,
1038 grp->active_channels[CTCM_READ],
1039 grp->active_channels[CTCM_WRITE]);
1041 CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id);
1045 * Unpack a just received skb and hand it over to
1047 * special MPC version of unpack_skb.
1049 * ch The channel where this skb has been received.
1050 * pskb The received skb.
1052 static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb)
1054 struct net_device *dev = ch->netdev;
1055 struct ctcm_priv *priv = dev->ml_priv;
1056 struct mpc_group *grp = priv->mpcg;
1057 struct pdu *curr_pdu;
1058 struct mpcg_info *mpcginfo;
1059 struct th_header *header = NULL;
1060 struct th_sweep *sweep = NULL;
1061 int pdu_last_seen = 0;
1063 struct sk_buff *skb;
1067 CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n",
1068 __func__, dev->name, smp_processor_id(), ch->id);
1070 header = (struct th_header *)pskb->data;
1071 if ((header->th_seg == 0) &&
1072 (header->th_ch_flag == 0) &&
1073 (header->th_blk_flag == 0) &&
1074 (header->th_seq_num == 0))
1075 /* nothing for us */ goto done;
1077 CTCM_PR_DBGDATA("%s: th_header\n", __func__);
1078 CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH);
1079 CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len);
1082 pskb->ip_summed = CHECKSUM_UNNECESSARY;
1083 skb_pull(pskb, TH_HEADER_LENGTH);
1085 if (likely(header->th_ch_flag == TH_HAS_PDU)) {
1086 CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__);
1087 if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) ||
1088 ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) &&
1089 (header->th_seq_num != ch->th_seq_num + 1) &&
1090 (ch->th_seq_num != 0))) {
1091 /* This is NOT the next segment *
1092 * we are not the correct race winner *
1093 * go away and let someone else win *
1094 * BUT..this only applies if xid negot *
1097 grp->out_of_sequence += 1;
1098 __skb_push(pskb, TH_HEADER_LENGTH);
1099 skb_queue_tail(&ch->io_queue, pskb);
1100 CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x "
1101 "got:%08x\n", __func__,
1102 ch->th_seq_num + 1, header->th_seq_num);
1106 grp->out_of_sequence = 0;
1107 ch->th_seq_num = header->th_seq_num;
1109 CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n",
1110 __func__, ch->th_seq_num);
1112 if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY))
1114 while ((pskb->len > 0) && !pdu_last_seen) {
1115 curr_pdu = (struct pdu *)pskb->data;
1117 CTCM_PR_DBGDATA("%s: pdu_header\n", __func__);
1118 CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH);
1119 CTCM_PR_DBGDATA("%s: pskb len: %04x \n",
1120 __func__, pskb->len);
1122 skb_pull(pskb, PDU_HEADER_LENGTH);
1124 if (curr_pdu->pdu_flag & PDU_LAST)
1126 if (curr_pdu->pdu_flag & PDU_CNTL)
1127 pskb->protocol = htons(ETH_P_SNAP);
1129 pskb->protocol = htons(ETH_P_SNA_DIX);
1131 if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) {
1132 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1133 "%s(%s): Dropping packet with "
1135 CTCM_FUNTAIL, dev->name, pskb->len);
1137 priv->stats.rx_dropped++;
1138 priv->stats.rx_length_errors++;
1141 skb_reset_mac_header(pskb);
1142 new_len = curr_pdu->pdu_offset;
1143 CTCM_PR_DBGDATA("%s: new_len: %04x \n",
1145 if ((new_len == 0) || (new_len > pskb->len)) {
1146 /* should never happen */
1147 /* pskb len must be hosed...bail out */
1148 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1149 "%s(%s): non valid pdu_offset: %04x",
1150 /* "data may be lost", */
1151 CTCM_FUNTAIL, dev->name, new_len);
1154 skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC);
1157 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1158 "%s(%s): MEMORY allocation error",
1159 CTCM_FUNTAIL, dev->name);
1160 priv->stats.rx_dropped++;
1161 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1164 memcpy(skb_put(skb, new_len), pskb->data, new_len);
1166 skb_reset_mac_header(skb);
1167 skb->dev = pskb->dev;
1168 skb->protocol = pskb->protocol;
1169 skb->ip_summed = CHECKSUM_UNNECESSARY;
1170 *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq;
1173 if (do_debug_data) {
1174 ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n",
1175 __func__, ch->pdu_seq);
1176 ctcm_pr_debug("%s: skb:%0lx "
1177 "skb len: %d \n", __func__,
1178 (unsigned long)skb, skb->len);
1179 ctcm_pr_debug("%s: up to 32 bytes "
1180 "of pdu_data sent\n", __func__);
1181 ctcmpc_dump32((char *)skb->data, skb->len);
1185 sendrc = netif_rx(skb);
1186 priv->stats.rx_packets++;
1187 priv->stats.rx_bytes += skblen;
1188 skb_pull(pskb, new_len); /* point to next PDU */
1191 mpcginfo = kmalloc(sizeof(struct mpcg_info), gfp_type());
1192 if (mpcginfo == NULL)
1196 mpcginfo->th = header;
1197 mpcginfo->skb = pskb;
1198 CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n",
1201 sweep = (struct th_sweep *)pskb->data;
1202 mpcginfo->sweep = sweep;
1203 if (header->th_ch_flag == TH_SWEEP_REQ)
1204 mpc_rcvd_sweep_req(mpcginfo);
1205 else if (header->th_ch_flag == TH_SWEEP_RESP)
1206 mpc_rcvd_sweep_resp(mpcginfo);
1207 else if (header->th_blk_flag == TH_DATA_IS_XID) {
1208 struct xid2 *thisxid = (struct xid2 *)pskb->data;
1209 skb_pull(pskb, XID2_LENGTH);
1210 mpcginfo->xid = thisxid;
1211 fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo);
1212 } else if (header->th_blk_flag == TH_DISCONTACT)
1213 fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo);
1214 else if (header->th_seq_num != 0) {
1215 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1216 "%s(%s): control pkt expected\n",
1217 CTCM_FUNTAIL, dev->name);
1218 priv->stats.rx_dropped++;
1219 /* mpcginfo only used for non-data transfers */
1222 ctcmpc_dump_skb(pskb, -8);
1227 dev_kfree_skb_any(pskb);
1228 if (sendrc == NET_RX_DROP) {
1230 "The network backlog for %s is exceeded, "
1231 "package dropped\n", __func__);
1232 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1235 CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
1236 __func__, dev->name, ch, ch->id);
1240 * tasklet helper for mpc's skb unpacking.
1242 * ch The channel to work on.
1243 * Allow flow control back pressure to occur here.
1244 * Throttling back channel can result in excessive
1245 * channel inactivity and system deact of channel
1247 void ctcmpc_bh(unsigned long thischan)
1249 struct channel *ch = (struct channel *)thischan;
1250 struct sk_buff *skb;
1251 struct net_device *dev = ch->netdev;
1252 struct ctcm_priv *priv = dev->ml_priv;
1253 struct mpc_group *grp = priv->mpcg;
1255 CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n",
1256 dev->name, smp_processor_id(), __func__, ch->id);
1257 /* caller has requested driver to throttle back */
1258 while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) &&
1259 (skb = skb_dequeue(&ch->io_queue))) {
1260 ctcmpc_unpack_skb(ch, skb);
1261 if (grp->out_of_sequence > 20) {
1262 /* assume data loss has occurred if */
1263 /* missing seq_num for extended */
1264 /* period of time */
1265 grp->out_of_sequence = 0;
1266 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1269 if (skb == skb_peek(&ch->io_queue))
1272 CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
1273 __func__, dev->name, ch, ch->id);
1278 * MPC Group Initializations
1280 struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv)
1282 struct mpc_group *grp;
1284 CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
1285 "Enter %s(%p)", CTCM_FUNTAIL, priv);
1287 grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL);
1291 grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names,
1292 MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm,
1293 mpcg_fsm_len, GFP_KERNEL);
1294 if (grp->fsm == NULL) {
1299 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1300 fsm_settimer(grp->fsm, &grp->timer);
1303 __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
1304 if (grp->xid_skb == NULL) {
1305 kfree_fsm(grp->fsm);
1309 /* base xid for all channels in group */
1310 grp->xid_skb_data = grp->xid_skb->data;
1311 grp->xid_th = (struct th_header *)grp->xid_skb->data;
1312 memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH),
1313 &thnorm, TH_HEADER_LENGTH);
1315 grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb);
1316 memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH);
1317 grp->xid->xid2_adj_id = jiffies | 0xfff00000;
1318 grp->xid->xid2_sender_id = jiffies;
1320 grp->xid_id = skb_tail_pointer(grp->xid_skb);
1321 memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4);
1324 __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA);
1325 if (grp->rcvd_xid_skb == NULL) {
1326 kfree_fsm(grp->fsm);
1327 dev_kfree_skb(grp->xid_skb);
1331 grp->rcvd_xid_data = grp->rcvd_xid_skb->data;
1332 grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
1333 memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH),
1334 &thnorm, TH_HEADER_LENGTH);
1335 grp->saved_xid2 = NULL;
1336 priv->xid = grp->xid;
1342 * The MPC Group Station FSM
1346 * MPC Group Station FSM actions
1347 * CTCM_PROTO_MPC only
1351 * NOP action for statemachines
1353 static void mpc_action_nop(fsm_instance *fi, int event, void *arg)
1358 * invoked when the device transitions to dev_stopped
1359 * MPC will stop each individual channel if a single XID failure
1360 * occurs, or will intitiate all channels be stopped if a GROUP
1361 * level failure occurs.
1363 static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg)
1365 struct net_device *dev = arg;
1366 struct ctcm_priv *priv;
1367 struct mpc_group *grp;
1368 struct channel *wch;
1370 CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name);
1372 priv = dev->ml_priv;
1374 grp->flow_off_called = 0;
1375 fsm_deltimer(&grp->timer);
1376 if (grp->channels_terminating)
1379 grp->channels_terminating = 1;
1380 grp->saved_state = fsm_getstate(grp->fsm);
1381 fsm_newstate(grp->fsm, MPCG_STATE_INOP);
1382 if (grp->saved_state > MPCG_STATE_XID7INITF)
1383 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1384 "%s(%s): MPC GROUP INOPERATIVE",
1385 CTCM_FUNTAIL, dev->name);
1386 if ((grp->saved_state != MPCG_STATE_RESET) ||
1387 /* dealloc_channel has been called */
1388 (grp->port_persist == 0))
1389 fsm_deltimer(&priv->restart_timer);
1391 wch = priv->channel[CTCM_WRITE];
1393 switch (grp->saved_state) {
1394 case MPCG_STATE_RESET:
1395 case MPCG_STATE_INOP:
1396 case MPCG_STATE_XID2INITW:
1397 case MPCG_STATE_XID0IOWAIT:
1398 case MPCG_STATE_XID2INITX:
1399 case MPCG_STATE_XID7INITW:
1400 case MPCG_STATE_XID7INITX:
1401 case MPCG_STATE_XID0IOWAIX:
1402 case MPCG_STATE_XID7INITI:
1403 case MPCG_STATE_XID7INITZ:
1404 case MPCG_STATE_XID7INITF:
1406 case MPCG_STATE_FLOWC:
1407 case MPCG_STATE_READY:
1409 tasklet_hi_schedule(&wch->ch_disc_tasklet);
1412 grp->xid2_tgnum = 0;
1413 grp->group_max_buflen = 0; /*min of all received */
1414 grp->outstanding_xid2 = 0;
1415 grp->outstanding_xid7 = 0;
1416 grp->outstanding_xid7_p2 = 0;
1417 grp->saved_xid2 = NULL;
1419 grp->changed_side = 0;
1421 grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
1422 skb_reset_tail_pointer(grp->rcvd_xid_skb);
1423 grp->rcvd_xid_skb->len = 0;
1424 grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
1425 memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm,
1428 if (grp->send_qllc_disc == 1) {
1429 grp->send_qllc_disc = 0;
1430 mpc_send_qllc_discontact(dev);
1433 /* DO NOT issue DEV_EVENT_STOP directly out of this code */
1434 /* This can result in INOP of VTAM PU due to halting of */
1435 /* outstanding IO which causes a sense to be returned */
1436 /* Only about 3 senses are allowed and then IOS/VTAM will*/
1437 /* become unreachable without manual intervention */
1438 if ((grp->port_persist == 1) || (grp->alloc_called)) {
1439 grp->alloc_called = 0;
1440 fsm_deltimer(&priv->restart_timer);
1441 fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev);
1442 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1443 if (grp->saved_state > MPCG_STATE_XID7INITF)
1444 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
1445 "%s(%s): MPC GROUP RECOVERY SCHEDULED",
1446 CTCM_FUNTAIL, dev->name);
1448 fsm_deltimer(&priv->restart_timer);
1449 fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev);
1450 fsm_newstate(grp->fsm, MPCG_STATE_RESET);
1451 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
1452 "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED",
1453 CTCM_FUNTAIL, dev->name);
1458 * Handle mpc group action timeout.
1459 * MPC Group Station FSM action
1460 * CTCM_PROTO_MPC only
1462 * fi An instance of an mpc_group fsm.
1463 * event The event, just happened.
1464 * arg Generic pointer, casted from net_device * upon call.
1466 static void mpc_action_timeout(fsm_instance *fi, int event, void *arg)
1468 struct net_device *dev = arg;
1469 struct ctcm_priv *priv;
1470 struct mpc_group *grp;
1471 struct channel *wch;
1472 struct channel *rch;
1474 priv = dev->ml_priv;
1476 wch = priv->channel[CTCM_WRITE];
1477 rch = priv->channel[CTCM_READ];
1479 switch (fsm_getstate(grp->fsm)) {
1480 case MPCG_STATE_XID2INITW:
1481 /* Unless there is outstanding IO on the */
1482 /* channel just return and wait for ATTN */
1483 /* interrupt to begin XID negotiations */
1484 if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) &&
1485 (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
1488 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1491 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1493 CTCM_FUNTAIL, dev->name);
1498 * MPC Group Station FSM action
1499 * CTCM_PROTO_MPC only
1501 void mpc_action_discontact(fsm_instance *fi, int event, void *arg)
1503 struct mpcg_info *mpcginfo = arg;
1504 struct channel *ch = mpcginfo->ch;
1505 struct net_device *dev;
1506 struct ctcm_priv *priv;
1507 struct mpc_group *grp;
1512 priv = dev->ml_priv;
1514 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1516 CTCM_FUNTAIL, dev->name, ch->id);
1518 grp->send_qllc_disc = 1;
1519 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1528 * MPC Group Station - not part of FSM
1529 * CTCM_PROTO_MPC only
1530 * called from add_channel in ctcm_main.c
1532 void mpc_action_send_discontact(unsigned long thischan)
1535 struct channel *ch = (struct channel *)thischan;
1536 unsigned long saveflags = 0;
1538 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1539 rc = ccw_device_start(ch->cdev, &ch->ccw[15],
1540 (unsigned long)ch, 0xff, 0);
1541 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
1544 ctcm_ccw_check_rc(ch, rc, (char *)__func__);
1552 * helper function of mpc FSM
1553 * CTCM_PROTO_MPC only
1554 * mpc_action_rcvd_xid7
1556 static int mpc_validate_xid(struct mpcg_info *mpcginfo)
1558 struct channel *ch = mpcginfo->ch;
1559 struct net_device *dev = ch->netdev;
1560 struct ctcm_priv *priv = dev->ml_priv;
1561 struct mpc_group *grp = priv->mpcg;
1562 struct xid2 *xid = mpcginfo->xid;
1566 int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
1568 CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid);
1572 /* XID REJECTED: xid == NULL */
1573 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1574 "%s(%s): xid = NULL",
1575 CTCM_FUNTAIL, ch->id);
1579 CTCM_D3_DUMP((char *)xid, XID2_LENGTH);
1581 /*the received direction should be the opposite of ours */
1582 if (((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? XID2_WRITE_SIDE :
1583 XID2_READ_SIDE) != xid->xid2_dlc_type) {
1585 /* XID REJECTED: r/w channel pairing mismatch */
1586 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1587 "%s(%s): r/w channel pairing mismatch",
1588 CTCM_FUNTAIL, ch->id);
1592 if (xid->xid2_dlc_type == XID2_READ_SIDE) {
1593 CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__,
1594 grp->group_max_buflen, xid->xid2_buf_len);
1596 if (grp->group_max_buflen == 0 || grp->group_max_buflen >
1597 xid->xid2_buf_len - len)
1598 grp->group_max_buflen = xid->xid2_buf_len - len;
1601 if (grp->saved_xid2 == NULL) {
1603 (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb);
1605 memcpy(skb_put(grp->rcvd_xid_skb,
1606 XID2_LENGTH), xid, XID2_LENGTH);
1607 grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
1609 skb_reset_tail_pointer(grp->rcvd_xid_skb);
1610 grp->rcvd_xid_skb->len = 0;
1612 /* convert two 32 bit numbers into 1 64 bit for id compare */
1613 our_id = (__u64)priv->xid->xid2_adj_id;
1614 our_id = our_id << 32;
1615 our_id = our_id + priv->xid->xid2_sender_id;
1616 their_id = (__u64)xid->xid2_adj_id;
1617 their_id = their_id << 32;
1618 their_id = their_id + xid->xid2_sender_id;
1619 /* lower id assume the xside role */
1620 if (our_id < their_id) {
1622 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1623 "%s(%s): WE HAVE LOW ID - TAKE XSIDE",
1624 CTCM_FUNTAIL, ch->id);
1627 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
1628 "%s(%s): WE HAVE HIGH ID - TAKE YSIDE",
1629 CTCM_FUNTAIL, ch->id);
1633 if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) {
1635 /* XID REJECTED: xid flag byte4 mismatch */
1636 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1637 "%s(%s): xid flag byte4 mismatch",
1638 CTCM_FUNTAIL, ch->id);
1640 if (xid->xid2_flag2 == 0x40) {
1642 /* XID REJECTED - xid NOGOOD */
1643 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1644 "%s(%s): xid NOGOOD",
1645 CTCM_FUNTAIL, ch->id);
1647 if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) {
1649 /* XID REJECTED - Adjacent Station ID Mismatch */
1650 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1651 "%s(%s): Adjacent Station ID Mismatch",
1652 CTCM_FUNTAIL, ch->id);
1654 if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) {
1656 /* XID REJECTED - Sender Address Mismatch */
1657 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1658 "%s(%s): Sender Address Mismatch",
1659 CTCM_FUNTAIL, ch->id);
1665 "The XID used in the MPC protocol is not valid, "
1667 priv->xid->xid2_flag2 = 0x40;
1668 grp->saved_xid2->xid2_flag2 = 0x40;
1675 * MPC Group Station FSM action
1676 * CTCM_PROTO_MPC only
1678 static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side)
1680 struct channel *ch = arg;
1683 unsigned long saveflags = 0; /* avoids compiler warning with
1684 spin_unlock_irqrestore */
1686 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
1687 __func__, smp_processor_id(), ch, ch->id);
1689 if (ctcm_checkalloc_buffer(ch))
1693 * skb data-buffer referencing:
1695 ch->trans_skb->data = ch->trans_skb_data;
1696 skb_reset_tail_pointer(ch->trans_skb);
1697 ch->trans_skb->len = 0;
1698 /* result of the previous 3 statements is NOT always
1699 * already set after ctcm_checkalloc_buffer
1700 * because of possible reuse of the trans_skb
1702 memset(ch->trans_skb->data, 0, 16);
1703 ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
1704 /* check is main purpose here: */
1705 skb_put(ch->trans_skb, TH_HEADER_LENGTH);
1706 ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb);
1707 /* check is main purpose here: */
1708 skb_put(ch->trans_skb, XID2_LENGTH);
1709 ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb);
1710 /* cleanup back to startpoint */
1711 ch->trans_skb->data = ch->trans_skb_data;
1712 skb_reset_tail_pointer(ch->trans_skb);
1713 ch->trans_skb->len = 0;
1715 /* non-checking rewrite of above skb data-buffer referencing: */
1717 memset(ch->trans_skb->data, 0, 16);
1718 ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
1719 ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH);
1720 ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH;
1723 ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1724 ch->ccw[8].count = 0;
1725 ch->ccw[8].cda = 0x00;
1727 if (!(ch->xid_th && ch->xid && ch->xid_id))
1728 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
1729 "%s(%s): xid_th=%p, xid=%p, xid_id=%p",
1730 CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id);
1732 if (side == XSIDE) {
1733 /* mpc_action_xside_xid */
1734 if (ch->xid_th == NULL)
1736 ch->ccw[9].cmd_code = CCW_CMD_WRITE;
1737 ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1738 ch->ccw[9].count = TH_HEADER_LENGTH;
1739 ch->ccw[9].cda = virt_to_phys(ch->xid_th);
1741 if (ch->xid == NULL)
1743 ch->ccw[10].cmd_code = CCW_CMD_WRITE;
1744 ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1745 ch->ccw[10].count = XID2_LENGTH;
1746 ch->ccw[10].cda = virt_to_phys(ch->xid);
1748 ch->ccw[11].cmd_code = CCW_CMD_READ;
1749 ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1750 ch->ccw[11].count = TH_HEADER_LENGTH;
1751 ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th);
1753 ch->ccw[12].cmd_code = CCW_CMD_READ;
1754 ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1755 ch->ccw[12].count = XID2_LENGTH;
1756 ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid);
1758 ch->ccw[13].cmd_code = CCW_CMD_READ;
1759 ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id);
1761 } else { /* side == YSIDE : mpc_action_yside_xid */
1762 ch->ccw[9].cmd_code = CCW_CMD_READ;
1763 ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1764 ch->ccw[9].count = TH_HEADER_LENGTH;
1765 ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th);
1767 ch->ccw[10].cmd_code = CCW_CMD_READ;
1768 ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1769 ch->ccw[10].count = XID2_LENGTH;
1770 ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid);
1772 if (ch->xid_th == NULL)
1774 ch->ccw[11].cmd_code = CCW_CMD_WRITE;
1775 ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1776 ch->ccw[11].count = TH_HEADER_LENGTH;
1777 ch->ccw[11].cda = virt_to_phys(ch->xid_th);
1779 if (ch->xid == NULL)
1781 ch->ccw[12].cmd_code = CCW_CMD_WRITE;
1782 ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1783 ch->ccw[12].count = XID2_LENGTH;
1784 ch->ccw[12].cda = virt_to_phys(ch->xid);
1786 if (ch->xid_id == NULL)
1788 ch->ccw[13].cmd_code = CCW_CMD_WRITE;
1789 ch->ccw[13].cda = virt_to_phys(ch->xid_id);
1792 ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1793 ch->ccw[13].count = 4;
1795 ch->ccw[14].cmd_code = CCW_CMD_NOOP;
1796 ch->ccw[14].flags = CCW_FLAG_SLI;
1797 ch->ccw[14].count = 0;
1798 ch->ccw[14].cda = 0;
1800 CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7);
1801 CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH);
1802 CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH);
1803 CTCM_D3_DUMP((char *)ch->xid_id, 4);
1806 /* Such conditional locking is a known problem for
1807 * sparse because its static undeterministic.
1808 * Warnings should be ignored here. */
1809 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1813 fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch);
1814 rc = ccw_device_start(ch->cdev, &ch->ccw[8],
1815 (unsigned long)ch, 0xff, 0);
1817 if (gotlock) /* see remark above about conditional locking */
1818 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
1821 ctcm_ccw_check_rc(ch, rc,
1822 (side == XSIDE) ? "x-side XID" : "y-side XID");
1826 CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n",
1827 __func__, ch, ch->id);
1833 * MPC Group Station FSM action
1834 * CTCM_PROTO_MPC only
1836 static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg)
1838 mpc_action_side_xid(fsm, arg, XSIDE);
1842 * MPC Group Station FSM action
1843 * CTCM_PROTO_MPC only
1845 static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg)
1847 mpc_action_side_xid(fsm, arg, YSIDE);
1851 * MPC Group Station FSM action
1852 * CTCM_PROTO_MPC only
1854 static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg)
1856 struct channel *ch = arg;
1857 struct net_device *dev = ch->netdev;
1858 struct ctcm_priv *priv = dev->ml_priv;
1859 struct mpc_group *grp = priv->mpcg;
1861 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
1862 __func__, smp_processor_id(), ch, ch->id);
1864 if (ch->xid == NULL) {
1865 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1866 "%s(%s): ch->xid == NULL",
1867 CTCM_FUNTAIL, dev->name);
1871 fsm_newstate(ch->fsm, CH_XID0_INPROGRESS);
1873 ch->xid->xid2_option = XID2_0;
1875 switch (fsm_getstate(grp->fsm)) {
1876 case MPCG_STATE_XID2INITW:
1877 case MPCG_STATE_XID2INITX:
1878 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1880 case MPCG_STATE_XID0IOWAIT:
1881 case MPCG_STATE_XID0IOWAIX:
1882 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1886 fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
1892 * MPC Group Station FSM action
1893 * CTCM_PROTO_MPC only
1895 static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg)
1897 struct net_device *dev = arg;
1898 struct ctcm_priv *priv = dev->ml_priv;
1899 struct mpc_group *grp = NULL;
1908 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
1909 struct channel *ch = priv->channel[direction];
1910 struct xid2 *thisxid = ch->xid;
1911 ch->xid_skb->data = ch->xid_skb_data;
1912 skb_reset_tail_pointer(ch->xid_skb);
1913 ch->xid_skb->len = 0;
1914 thisxid->xid2_option = XID2_7;
1918 if (grp->outstanding_xid7_p2 > 0) {
1919 if (grp->roll == YSIDE) {
1920 if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) {
1921 fsm_newstate(ch->fsm, CH_XID7_PENDING2);
1922 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1923 memcpy(skb_put(ch->xid_skb,
1925 &thdummy, TH_HEADER_LENGTH);
1928 } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) {
1929 fsm_newstate(ch->fsm, CH_XID7_PENDING2);
1930 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1931 memcpy(skb_put(ch->xid_skb,
1933 &thnorm, TH_HEADER_LENGTH);
1938 if (grp->roll == YSIDE) {
1939 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) {
1940 fsm_newstate(ch->fsm, CH_XID7_PENDING4);
1941 memcpy(skb_put(ch->xid_skb,
1943 &thnorm, TH_HEADER_LENGTH);
1944 ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
1947 } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) {
1948 fsm_newstate(ch->fsm, CH_XID7_PENDING4);
1949 ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
1950 memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH),
1951 &thdummy, TH_HEADER_LENGTH);
1957 fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
1964 * MPC Group Station FSM action
1965 * CTCM_PROTO_MPC only
1967 static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg)
1970 struct mpcg_info *mpcginfo = arg;
1971 struct channel *ch = mpcginfo->ch;
1972 struct net_device *dev = ch->netdev;
1973 struct ctcm_priv *priv = dev->ml_priv;
1974 struct mpc_group *grp = priv->mpcg;
1976 CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n",
1977 __func__, ch->id, grp->outstanding_xid2,
1978 grp->outstanding_xid7, grp->outstanding_xid7_p2);
1980 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING)
1981 fsm_newstate(ch->fsm, CH_XID7_PENDING);
1983 grp->outstanding_xid2--;
1984 grp->outstanding_xid7++;
1985 grp->outstanding_xid7_p2++;
1987 /* must change state before validating xid to */
1988 /* properly handle interim interrupts received*/
1989 switch (fsm_getstate(grp->fsm)) {
1990 case MPCG_STATE_XID2INITW:
1991 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX);
1992 mpc_validate_xid(mpcginfo);
1994 case MPCG_STATE_XID0IOWAIT:
1995 fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX);
1996 mpc_validate_xid(mpcginfo);
1998 case MPCG_STATE_XID2INITX:
1999 if (grp->outstanding_xid2 == 0) {
2000 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW);
2001 mpc_validate_xid(mpcginfo);
2002 fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
2005 case MPCG_STATE_XID0IOWAIX:
2006 if (grp->outstanding_xid2 == 0) {
2007 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI);
2008 mpc_validate_xid(mpcginfo);
2009 fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
2015 CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n",
2016 __func__, ch->id, grp->outstanding_xid2,
2017 grp->outstanding_xid7, grp->outstanding_xid7_p2);
2018 CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n",
2020 fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm));
2027 * MPC Group Station FSM action
2028 * CTCM_PROTO_MPC only
2030 static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg)
2032 struct mpcg_info *mpcginfo = arg;
2033 struct channel *ch = mpcginfo->ch;
2034 struct net_device *dev = ch->netdev;
2035 struct ctcm_priv *priv = dev->ml_priv;
2036 struct mpc_group *grp = priv->mpcg;
2038 CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
2039 __func__, smp_processor_id(), ch, ch->id);
2040 CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n",
2041 __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2);
2043 grp->outstanding_xid7--;
2044 ch->xid_skb->data = ch->xid_skb_data;
2045 skb_reset_tail_pointer(ch->xid_skb);
2046 ch->xid_skb->len = 0;
2048 switch (fsm_getstate(grp->fsm)) {
2049 case MPCG_STATE_XID7INITI:
2050 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ);
2051 mpc_validate_xid(mpcginfo);
2053 case MPCG_STATE_XID7INITW:
2054 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX);
2055 mpc_validate_xid(mpcginfo);
2057 case MPCG_STATE_XID7INITZ:
2058 case MPCG_STATE_XID7INITX:
2059 if (grp->outstanding_xid7 == 0) {
2060 if (grp->outstanding_xid7_p2 > 0) {
2061 grp->outstanding_xid7 =
2062 grp->outstanding_xid7_p2;
2063 grp->outstanding_xid7_p2 = 0;
2065 fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF);
2067 mpc_validate_xid(mpcginfo);
2068 fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
2071 mpc_validate_xid(mpcginfo);
2079 * mpc_action helper of an MPC Group Station FSM action
2080 * CTCM_PROTO_MPC only
2082 static int mpc_send_qllc_discontact(struct net_device *dev)
2085 struct sk_buff *skb;
2086 struct qllc *qllcptr;
2087 struct ctcm_priv *priv = dev->ml_priv;
2088 struct mpc_group *grp = priv->mpcg;
2090 CTCM_PR_DEBUG("%s: GROUP STATE: %s\n",
2091 __func__, mpcg_state_names[grp->saved_state]);
2093 switch (grp->saved_state) {
2095 * establish conn callback function is
2096 * preferred method to report failure
2098 case MPCG_STATE_XID0IOWAIT:
2099 case MPCG_STATE_XID0IOWAIX:
2100 case MPCG_STATE_XID7INITI:
2101 case MPCG_STATE_XID7INITZ:
2102 case MPCG_STATE_XID2INITW:
2103 case MPCG_STATE_XID2INITX:
2104 case MPCG_STATE_XID7INITW:
2105 case MPCG_STATE_XID7INITX:
2106 if (grp->estconnfunc) {
2107 grp->estconnfunc(grp->port_num, -1, 0);
2108 grp->estconnfunc = NULL;
2111 case MPCG_STATE_FLOWC:
2112 case MPCG_STATE_READY:
2113 grp->send_qllc_disc = 2;
2114 new_len = sizeof(struct qllc);
2115 qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA);
2116 if (qllcptr == NULL) {
2117 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2118 "%s(%s): qllcptr allocation error",
2119 CTCM_FUNTAIL, dev->name);
2123 qllcptr->qllc_address = 0xcc;
2124 qllcptr->qllc_commands = 0x03;
2126 skb = __dev_alloc_skb(new_len, GFP_ATOMIC);
2129 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2130 "%s(%s): skb allocation error",
2131 CTCM_FUNTAIL, dev->name);
2132 priv->stats.rx_dropped++;
2137 memcpy(skb_put(skb, new_len), qllcptr, new_len);
2140 if (skb_headroom(skb) < 4) {
2141 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
2142 "%s(%s): skb_headroom error",
2143 CTCM_FUNTAIL, dev->name);
2144 dev_kfree_skb_any(skb);
2148 *((__u32 *)skb_push(skb, 4)) =
2149 priv->channel[CTCM_READ]->pdu_seq;
2150 priv->channel[CTCM_READ]->pdu_seq++;
2151 CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n",
2152 __func__, priv->channel[CTCM_READ]->pdu_seq);
2154 /* receipt of CC03 resets anticipated sequence number on
2156 priv->channel[CTCM_READ]->pdu_seq = 0x00;
2157 skb_reset_mac_header(skb);
2159 skb->protocol = htons(ETH_P_SNAP);
2160 skb->ip_summed = CHECKSUM_UNNECESSARY;
2162 CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4));
2173 /* --- This is the END my friend --- */