Commit | Line | Data |
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293d984f PT |
1 | /* |
2 | * drivers/s390/net/ctcm_mpc.c | |
3 | * | |
4 | * Copyright IBM Corp. 2004, 2007 | |
5 | * Authors: Belinda Thompson (belindat@us.ibm.com) | |
6 | * Andy Richter (richtera@us.ibm.com) | |
7 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
8 | */ | |
9 | ||
10 | /* | |
11 | This module exports functions to be used by CCS: | |
12 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
13 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
14 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
15 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
16 | */ | |
17 | ||
18 | #undef DEBUG | |
19 | #undef DEBUGDATA | |
20 | #undef DEBUGCCW | |
21 | ||
2a7c6f2c PT |
22 | #define KMSG_COMPONENT "ctcm" |
23 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
24 | ||
293d984f PT |
25 | #include <linux/module.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/sched.h> | |
34 | ||
35 | #include <linux/signal.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/proc_fs.h> | |
38 | ||
39 | #include <linux/ip.h> | |
40 | #include <linux/if_arp.h> | |
41 | #include <linux/tcp.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/ctype.h> | |
44 | #include <linux/netdevice.h> | |
45 | #include <net/dst.h> | |
46 | ||
47 | #include <linux/io.h> /* instead of <asm/io.h> ok ? */ | |
48 | #include <asm/ccwdev.h> | |
49 | #include <asm/ccwgroup.h> | |
50 | #include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */ | |
51 | #include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */ | |
52 | #include <linux/wait.h> | |
53 | #include <linux/moduleparam.h> | |
54 | #include <asm/idals.h> | |
55 | ||
293d984f PT |
56 | #include "ctcm_mpc.h" |
57 | #include "ctcm_main.h" | |
58 | #include "ctcm_fsms.h" | |
59 | ||
60 | static const struct xid2 init_xid = { | |
61 | .xid2_type_id = XID_FM2, | |
62 | .xid2_len = 0x45, | |
63 | .xid2_adj_id = 0, | |
64 | .xid2_rlen = 0x31, | |
65 | .xid2_resv1 = 0, | |
66 | .xid2_flag1 = 0, | |
67 | .xid2_fmtt = 0, | |
68 | .xid2_flag4 = 0x80, | |
69 | .xid2_resv2 = 0, | |
70 | .xid2_tgnum = 0, | |
71 | .xid2_sender_id = 0, | |
72 | .xid2_flag2 = 0, | |
73 | .xid2_option = XID2_0, | |
74 | .xid2_resv3 = "\x00", | |
75 | .xid2_resv4 = 0, | |
76 | .xid2_dlc_type = XID2_READ_SIDE, | |
77 | .xid2_resv5 = 0, | |
78 | .xid2_mpc_flag = 0, | |
79 | .xid2_resv6 = 0, | |
80 | .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35), | |
81 | }; | |
82 | ||
83 | static const struct th_header thnorm = { | |
84 | .th_seg = 0x00, | |
85 | .th_ch_flag = TH_IS_XID, | |
86 | .th_blk_flag = TH_DATA_IS_XID, | |
87 | .th_is_xid = 0x01, | |
88 | .th_seq_num = 0x00000000, | |
89 | }; | |
90 | ||
91 | static const struct th_header thdummy = { | |
92 | .th_seg = 0x00, | |
93 | .th_ch_flag = 0x00, | |
94 | .th_blk_flag = TH_DATA_IS_XID, | |
95 | .th_is_xid = 0x01, | |
96 | .th_seq_num = 0x00000000, | |
97 | }; | |
98 | ||
99 | /* | |
100 | * Definition of one MPC group | |
101 | */ | |
102 | ||
103 | /* | |
104 | * Compatibility macros for busy handling | |
105 | * of network devices. | |
106 | */ | |
107 | ||
108 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb); | |
109 | ||
110 | /* | |
111 | * MPC Group state machine actions (static prototypes) | |
112 | */ | |
113 | static void mpc_action_nop(fsm_instance *fsm, int event, void *arg); | |
114 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg); | |
115 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg); | |
116 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg); | |
117 | static int mpc_validate_xid(struct mpcg_info *mpcginfo); | |
118 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg); | |
119 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg); | |
120 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg); | |
121 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg); | |
122 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg); | |
123 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg); | |
124 | ||
125 | #ifdef DEBUGDATA | |
126 | /*-------------------------------------------------------------------* | |
127 | * Dump buffer format * | |
128 | * * | |
129 | *--------------------------------------------------------------------*/ | |
130 | void ctcmpc_dumpit(char *buf, int len) | |
131 | { | |
132 | __u32 ct, sw, rm, dup; | |
133 | char *ptr, *rptr; | |
134 | char tbuf[82], tdup[82]; | |
135 | #if (UTS_MACHINE == s390x) | |
136 | char addr[22]; | |
137 | #else | |
138 | char addr[12]; | |
139 | #endif | |
140 | char boff[12]; | |
141 | char bhex[82], duphex[82]; | |
142 | char basc[40]; | |
143 | ||
144 | sw = 0; | |
145 | rptr = ptr = buf; | |
146 | rm = 16; | |
147 | duphex[0] = 0x00; | |
148 | dup = 0; | |
149 | ||
150 | for (ct = 0; ct < len; ct++, ptr++, rptr++) { | |
151 | if (sw == 0) { | |
152 | #if (UTS_MACHINE == s390x) | |
aa3f2cb6 | 153 | sprintf(addr, "%16.16lx", (__u64)rptr); |
293d984f PT |
154 | #else |
155 | sprintf(addr, "%8.8X", (__u32)rptr); | |
156 | #endif | |
157 | ||
158 | sprintf(boff, "%4.4X", (__u32)ct); | |
159 | bhex[0] = '\0'; | |
160 | basc[0] = '\0'; | |
161 | } | |
162 | if ((sw == 4) || (sw == 12)) | |
163 | strcat(bhex, " "); | |
164 | if (sw == 8) | |
165 | strcat(bhex, " "); | |
166 | ||
167 | #if (UTS_MACHINE == s390x) | |
aa3f2cb6 | 168 | sprintf(tbuf, "%2.2lX", (__u64)*ptr); |
293d984f PT |
169 | #else |
170 | sprintf(tbuf, "%2.2X", (__u32)*ptr); | |
171 | #endif | |
172 | ||
173 | tbuf[2] = '\0'; | |
174 | strcat(bhex, tbuf); | |
175 | if ((0 != isprint(*ptr)) && (*ptr >= 0x20)) | |
176 | basc[sw] = *ptr; | |
177 | else | |
178 | basc[sw] = '.'; | |
179 | ||
180 | basc[sw+1] = '\0'; | |
181 | sw++; | |
182 | rm--; | |
aa3f2cb6 PT |
183 | if (sw != 16) |
184 | continue; | |
185 | if ((strcmp(duphex, bhex)) != 0) { | |
186 | if (dup != 0) { | |
187 | sprintf(tdup, | |
188 | "Duplicate as above to %s", addr); | |
189 | ctcm_pr_debug(" --- %s ---\n", | |
190 | tdup); | |
191 | } | |
192 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", | |
293d984f | 193 | addr, boff, bhex, basc); |
aa3f2cb6 PT |
194 | dup = 0; |
195 | strcpy(duphex, bhex); | |
196 | } else | |
197 | dup++; | |
293d984f | 198 | |
aa3f2cb6 PT |
199 | sw = 0; |
200 | rm = 16; | |
293d984f PT |
201 | } /* endfor */ |
202 | ||
203 | if (sw != 0) { | |
204 | for ( ; rm > 0; rm--, sw++) { | |
205 | if ((sw == 4) || (sw == 12)) | |
206 | strcat(bhex, " "); | |
207 | if (sw == 8) | |
208 | strcat(bhex, " "); | |
209 | strcat(bhex, " "); | |
210 | strcat(basc, " "); | |
211 | } | |
212 | if (dup != 0) { | |
213 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 214 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f | 215 | } |
aa3f2cb6 PT |
216 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
217 | addr, boff, bhex, basc); | |
293d984f PT |
218 | } else { |
219 | if (dup >= 1) { | |
220 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 221 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f PT |
222 | } |
223 | if (dup != 0) { | |
aa3f2cb6 | 224 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
293d984f PT |
225 | addr, boff, bhex, basc); |
226 | } | |
227 | } | |
228 | ||
229 | return; | |
230 | ||
231 | } /* end of ctcmpc_dumpit */ | |
232 | #endif | |
233 | ||
234 | #ifdef DEBUGDATA | |
235 | /* | |
236 | * Dump header and first 16 bytes of an sk_buff for debugging purposes. | |
237 | * | |
238 | * skb The sk_buff to dump. | |
239 | * offset Offset relative to skb-data, where to start the dump. | |
240 | */ | |
241 | void ctcmpc_dump_skb(struct sk_buff *skb, int offset) | |
242 | { | |
aa3f2cb6 | 243 | __u8 *p = skb->data; |
293d984f PT |
244 | struct th_header *header; |
245 | struct pdu *pheader; | |
246 | int bl = skb->len; | |
247 | int i; | |
248 | ||
249 | if (p == NULL) | |
250 | return; | |
251 | ||
252 | p += offset; | |
253 | header = (struct th_header *)p; | |
254 | ||
aa3f2cb6 PT |
255 | ctcm_pr_debug("dump:\n"); |
256 | ctcm_pr_debug("skb len=%d \n", skb->len); | |
293d984f PT |
257 | if (skb->len > 2) { |
258 | switch (header->th_ch_flag) { | |
259 | case TH_HAS_PDU: | |
260 | break; | |
261 | case 0x00: | |
262 | case TH_IS_XID: | |
263 | if ((header->th_blk_flag == TH_DATA_IS_XID) && | |
264 | (header->th_is_xid == 0x01)) | |
265 | goto dumpth; | |
266 | case TH_SWEEP_REQ: | |
267 | goto dumpth; | |
268 | case TH_SWEEP_RESP: | |
269 | goto dumpth; | |
270 | default: | |
271 | break; | |
272 | } | |
273 | ||
274 | pheader = (struct pdu *)p; | |
aa3f2cb6 PT |
275 | ctcm_pr_debug("pdu->offset: %d hex: %04x\n", |
276 | pheader->pdu_offset, pheader->pdu_offset); | |
277 | ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag); | |
278 | ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto); | |
279 | ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq); | |
293d984f PT |
280 | goto dumpdata; |
281 | ||
282 | dumpth: | |
aa3f2cb6 PT |
283 | ctcm_pr_debug("th->seg : %02x\n", header->th_seg); |
284 | ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag); | |
285 | ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag); | |
286 | ctcm_pr_debug("th->type : %s\n", | |
287 | (header->th_is_xid) ? "DATA" : "XID"); | |
288 | ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num); | |
293d984f PT |
289 | |
290 | } | |
291 | dumpdata: | |
292 | if (bl > 32) | |
293 | bl = 32; | |
aa3f2cb6 | 294 | ctcm_pr_debug("data: "); |
293d984f | 295 | for (i = 0; i < bl; i++) |
aa3f2cb6 PT |
296 | ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n"); |
297 | ctcm_pr_debug("\n"); | |
293d984f PT |
298 | } |
299 | #endif | |
300 | ||
aa3f2cb6 PT |
301 | static struct net_device *ctcmpc_get_dev(int port_num) |
302 | { | |
303 | char device[20]; | |
304 | struct net_device *dev; | |
305 | struct ctcm_priv *priv; | |
306 | ||
307 | sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); | |
308 | ||
309 | dev = __dev_get_by_name(&init_net, device); | |
310 | ||
311 | if (dev == NULL) { | |
312 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
313 | "%s: Device not found by name: %s", | |
314 | CTCM_FUNTAIL, device); | |
315 | return NULL; | |
316 | } | |
261893d3 | 317 | priv = dev->ml_priv; |
aa3f2cb6 PT |
318 | if (priv == NULL) { |
319 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
261893d3 | 320 | "%s(%s): dev->ml_priv is NULL", |
aa3f2cb6 PT |
321 | CTCM_FUNTAIL, device); |
322 | return NULL; | |
323 | } | |
324 | if (priv->mpcg == NULL) { | |
325 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
326 | "%s(%s): priv->mpcg is NULL", | |
327 | CTCM_FUNTAIL, device); | |
328 | return NULL; | |
329 | } | |
330 | return dev; | |
331 | } | |
332 | ||
293d984f PT |
333 | /* |
334 | * ctc_mpc_alloc_channel | |
335 | * (exported interface) | |
336 | * | |
337 | * Device Initialization : | |
338 | * ACTPATH driven IO operations | |
339 | */ | |
340 | int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int)) | |
341 | { | |
293d984f PT |
342 | struct net_device *dev; |
343 | struct mpc_group *grp; | |
344 | struct ctcm_priv *priv; | |
345 | ||
aa3f2cb6 PT |
346 | dev = ctcmpc_get_dev(port_num); |
347 | if (dev == NULL) | |
293d984f | 348 | return 1; |
261893d3 | 349 | priv = dev->ml_priv; |
293d984f | 350 | grp = priv->mpcg; |
293d984f PT |
351 | |
352 | grp->allochanfunc = callback; | |
353 | grp->port_num = port_num; | |
354 | grp->port_persist = 1; | |
355 | ||
aa3f2cb6 PT |
356 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
357 | "%s(%s): state=%s", | |
358 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
359 | |
360 | switch (fsm_getstate(grp->fsm)) { | |
361 | case MPCG_STATE_INOP: | |
362 | /* Group is in the process of terminating */ | |
363 | grp->alloc_called = 1; | |
364 | break; | |
365 | case MPCG_STATE_RESET: | |
366 | /* MPC Group will transition to state */ | |
367 | /* MPCG_STATE_XID2INITW iff the minimum number */ | |
368 | /* of 1 read and 1 write channel have successfully*/ | |
369 | /* activated */ | |
370 | /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/ | |
371 | if (callback) | |
372 | grp->send_qllc_disc = 1; | |
373 | case MPCG_STATE_XID0IOWAIT: | |
374 | fsm_deltimer(&grp->timer); | |
375 | grp->outstanding_xid2 = 0; | |
376 | grp->outstanding_xid7 = 0; | |
377 | grp->outstanding_xid7_p2 = 0; | |
378 | grp->saved_xid2 = NULL; | |
379 | if (callback) | |
380 | ctcm_open(dev); | |
381 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
382 | break; | |
383 | case MPCG_STATE_READY: | |
384 | /* XID exchanges completed after PORT was activated */ | |
385 | /* Link station already active */ | |
386 | /* Maybe timing issue...retry callback */ | |
387 | grp->allocchan_callback_retries++; | |
388 | if (grp->allocchan_callback_retries < 4) { | |
389 | if (grp->allochanfunc) | |
390 | grp->allochanfunc(grp->port_num, | |
2a7c6f2c | 391 | grp->group_max_buflen); |
293d984f PT |
392 | } else { |
393 | /* there are problems...bail out */ | |
394 | /* there may be a state mismatch so restart */ | |
293d984f PT |
395 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
396 | grp->allocchan_callback_retries = 0; | |
397 | } | |
398 | break; | |
293d984f PT |
399 | } |
400 | ||
293d984f PT |
401 | return 0; |
402 | } | |
403 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
404 | ||
405 | /* | |
406 | * ctc_mpc_establish_connectivity | |
407 | * (exported interface) | |
408 | */ | |
409 | void ctc_mpc_establish_connectivity(int port_num, | |
410 | void (*callback)(int, int, int)) | |
411 | { | |
293d984f PT |
412 | struct net_device *dev; |
413 | struct mpc_group *grp; | |
414 | struct ctcm_priv *priv; | |
415 | struct channel *rch, *wch; | |
416 | ||
aa3f2cb6 PT |
417 | dev = ctcmpc_get_dev(port_num); |
418 | if (dev == NULL) | |
293d984f | 419 | return; |
261893d3 | 420 | priv = dev->ml_priv; |
aa3f2cb6 | 421 | grp = priv->mpcg; |
293d984f PT |
422 | rch = priv->channel[READ]; |
423 | wch = priv->channel[WRITE]; | |
424 | ||
aa3f2cb6 PT |
425 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
426 | "%s(%s): state=%s", | |
427 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
428 | |
429 | grp->estconnfunc = callback; | |
430 | grp->port_num = port_num; | |
431 | ||
432 | switch (fsm_getstate(grp->fsm)) { | |
433 | case MPCG_STATE_READY: | |
434 | /* XID exchanges completed after PORT was activated */ | |
435 | /* Link station already active */ | |
436 | /* Maybe timing issue...retry callback */ | |
437 | fsm_deltimer(&grp->timer); | |
438 | grp->estconn_callback_retries++; | |
439 | if (grp->estconn_callback_retries < 4) { | |
440 | if (grp->estconnfunc) { | |
441 | grp->estconnfunc(grp->port_num, 0, | |
442 | grp->group_max_buflen); | |
443 | grp->estconnfunc = NULL; | |
444 | } | |
445 | } else { | |
446 | /* there are problems...bail out */ | |
447 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
448 | grp->estconn_callback_retries = 0; | |
449 | } | |
450 | break; | |
451 | case MPCG_STATE_INOP: | |
452 | case MPCG_STATE_RESET: | |
453 | /* MPC Group is not ready to start XID - min num of */ | |
454 | /* 1 read and 1 write channel have not been acquired*/ | |
aa3f2cb6 PT |
455 | |
456 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
457 | "%s(%s): REJECTED - inactive channels", | |
458 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
459 | if (grp->estconnfunc) { |
460 | grp->estconnfunc(grp->port_num, -1, 0); | |
461 | grp->estconnfunc = NULL; | |
462 | } | |
463 | break; | |
464 | case MPCG_STATE_XID2INITW: | |
465 | /* alloc channel was called but no XID exchange */ | |
466 | /* has occurred. initiate xside XID exchange */ | |
467 | /* make sure yside XID0 processing has not started */ | |
aa3f2cb6 | 468 | |
293d984f PT |
469 | if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) || |
470 | (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) { | |
aa3f2cb6 PT |
471 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
472 | "%s(%s): ABORT - PASSIVE XID", | |
473 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
474 | break; |
475 | } | |
476 | grp->send_qllc_disc = 1; | |
477 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT); | |
478 | fsm_deltimer(&grp->timer); | |
479 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
480 | MPCG_EVENT_TIMER, dev); | |
481 | grp->outstanding_xid7 = 0; | |
482 | grp->outstanding_xid7_p2 = 0; | |
483 | grp->saved_xid2 = NULL; | |
484 | if ((rch->in_mpcgroup) && | |
485 | (fsm_getstate(rch->fsm) == CH_XID0_PENDING)) | |
486 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch); | |
487 | else { | |
aa3f2cb6 PT |
488 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
489 | "%s(%s): RX-%s not ready for ACTIVE XID0", | |
490 | CTCM_FUNTAIL, dev->name, rch->id); | |
293d984f PT |
491 | if (grp->estconnfunc) { |
492 | grp->estconnfunc(grp->port_num, -1, 0); | |
493 | grp->estconnfunc = NULL; | |
494 | } | |
495 | fsm_deltimer(&grp->timer); | |
496 | goto done; | |
497 | } | |
498 | if ((wch->in_mpcgroup) && | |
499 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) | |
500 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch); | |
501 | else { | |
aa3f2cb6 PT |
502 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
503 | "%s(%s): WX-%s not ready for ACTIVE XID0", | |
504 | CTCM_FUNTAIL, dev->name, wch->id); | |
293d984f PT |
505 | if (grp->estconnfunc) { |
506 | grp->estconnfunc(grp->port_num, -1, 0); | |
507 | grp->estconnfunc = NULL; | |
508 | } | |
509 | fsm_deltimer(&grp->timer); | |
510 | goto done; | |
511 | } | |
512 | break; | |
513 | case MPCG_STATE_XID0IOWAIT: | |
514 | /* already in active XID negotiations */ | |
515 | default: | |
516 | break; | |
517 | } | |
518 | ||
519 | done: | |
aa3f2cb6 | 520 | CTCM_PR_DEBUG("Exit %s()\n", __func__); |
293d984f PT |
521 | return; |
522 | } | |
523 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
524 | ||
525 | /* | |
526 | * ctc_mpc_dealloc_ch | |
527 | * (exported interface) | |
528 | */ | |
529 | void ctc_mpc_dealloc_ch(int port_num) | |
530 | { | |
531 | struct net_device *dev; | |
293d984f PT |
532 | struct ctcm_priv *priv; |
533 | struct mpc_group *grp; | |
534 | ||
aa3f2cb6 PT |
535 | dev = ctcmpc_get_dev(port_num); |
536 | if (dev == NULL) | |
537 | return; | |
261893d3 | 538 | priv = dev->ml_priv; |
aa3f2cb6 | 539 | grp = priv->mpcg; |
293d984f | 540 | |
aa3f2cb6 PT |
541 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG, |
542 | "%s: %s: refcount = %d\n", | |
543 | CTCM_FUNTAIL, dev->name, atomic_read(&dev->refcnt)); | |
293d984f | 544 | |
293d984f | 545 | fsm_deltimer(&priv->restart_timer); |
293d984f | 546 | grp->channels_terminating = 0; |
293d984f | 547 | fsm_deltimer(&grp->timer); |
293d984f PT |
548 | grp->allochanfunc = NULL; |
549 | grp->estconnfunc = NULL; | |
550 | grp->port_persist = 0; | |
551 | grp->send_qllc_disc = 0; | |
552 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
553 | ||
554 | ctcm_close(dev); | |
293d984f PT |
555 | return; |
556 | } | |
557 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
558 | ||
559 | /* | |
560 | * ctc_mpc_flow_control | |
561 | * (exported interface) | |
562 | */ | |
563 | void ctc_mpc_flow_control(int port_num, int flowc) | |
564 | { | |
293d984f PT |
565 | struct ctcm_priv *priv; |
566 | struct mpc_group *grp; | |
567 | struct net_device *dev; | |
568 | struct channel *rch; | |
569 | int mpcg_state; | |
570 | ||
aa3f2cb6 PT |
571 | dev = ctcmpc_get_dev(port_num); |
572 | if (dev == NULL) | |
293d984f | 573 | return; |
261893d3 | 574 | priv = dev->ml_priv; |
aa3f2cb6 | 575 | grp = priv->mpcg; |
293d984f | 576 | |
aa3f2cb6 PT |
577 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
578 | "%s: %s: flowc = %d", | |
579 | CTCM_FUNTAIL, dev->name, flowc); | |
293d984f | 580 | |
293d984f PT |
581 | rch = priv->channel[READ]; |
582 | ||
583 | mpcg_state = fsm_getstate(grp->fsm); | |
584 | switch (flowc) { | |
585 | case 1: | |
586 | if (mpcg_state == MPCG_STATE_FLOWC) | |
587 | break; | |
588 | if (mpcg_state == MPCG_STATE_READY) { | |
589 | if (grp->flow_off_called == 1) | |
590 | grp->flow_off_called = 0; | |
591 | else | |
592 | fsm_newstate(grp->fsm, MPCG_STATE_FLOWC); | |
593 | break; | |
594 | } | |
595 | break; | |
596 | case 0: | |
597 | if (mpcg_state == MPCG_STATE_FLOWC) { | |
598 | fsm_newstate(grp->fsm, MPCG_STATE_READY); | |
599 | /* ensure any data that has accumulated */ | |
600 | /* on the io_queue will now be sen t */ | |
601 | tasklet_schedule(&rch->ch_tasklet); | |
602 | } | |
603 | /* possible race condition */ | |
604 | if (mpcg_state == MPCG_STATE_READY) { | |
605 | grp->flow_off_called = 1; | |
606 | break; | |
607 | } | |
608 | break; | |
609 | } | |
610 | ||
293d984f PT |
611 | } |
612 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
613 | ||
614 | static int mpc_send_qllc_discontact(struct net_device *); | |
615 | ||
616 | /* | |
617 | * helper function of ctcmpc_unpack_skb | |
618 | */ | |
619 | static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) | |
620 | { | |
621 | struct channel *rch = mpcginfo->ch; | |
622 | struct net_device *dev = rch->netdev; | |
261893d3 | 623 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
624 | struct mpc_group *grp = priv->mpcg; |
625 | struct channel *ch = priv->channel[WRITE]; | |
626 | ||
aa3f2cb6 PT |
627 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
628 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); | |
293d984f PT |
629 | |
630 | grp->sweep_rsp_pend_num--; | |
631 | ||
632 | if ((grp->sweep_req_pend_num == 0) && | |
633 | (grp->sweep_rsp_pend_num == 0)) { | |
634 | fsm_deltimer(&ch->sweep_timer); | |
635 | grp->in_sweep = 0; | |
636 | rch->th_seq_num = 0x00; | |
637 | ch->th_seq_num = 0x00; | |
638 | ctcm_clear_busy_do(dev); | |
639 | } | |
640 | ||
641 | kfree(mpcginfo); | |
642 | ||
643 | return; | |
644 | ||
645 | } | |
646 | ||
647 | /* | |
648 | * helper function of mpc_rcvd_sweep_req | |
649 | * which is a helper of ctcmpc_unpack_skb | |
650 | */ | |
651 | static void ctcmpc_send_sweep_resp(struct channel *rch) | |
652 | { | |
653 | struct net_device *dev = rch->netdev; | |
261893d3 | 654 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
655 | struct mpc_group *grp = priv->mpcg; |
656 | int rc = 0; | |
657 | struct th_sweep *header; | |
658 | struct sk_buff *sweep_skb; | |
659 | struct channel *ch = priv->channel[WRITE]; | |
660 | ||
aa3f2cb6 | 661 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id); |
293d984f | 662 | |
aa3f2cb6 | 663 | sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
293d984f | 664 | if (sweep_skb == NULL) { |
aa3f2cb6 PT |
665 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
666 | "%s(%s): sweep_skb allocation ERROR\n", | |
667 | CTCM_FUNTAIL, rch->id); | |
293d984f PT |
668 | rc = -ENOMEM; |
669 | goto done; | |
670 | } | |
671 | ||
672 | header = (struct th_sweep *) | |
673 | kmalloc(sizeof(struct th_sweep), gfp_type()); | |
674 | ||
675 | if (!header) { | |
676 | dev_kfree_skb_any(sweep_skb); | |
677 | rc = -ENOMEM; | |
678 | goto done; | |
679 | } | |
680 | ||
681 | header->th.th_seg = 0x00 ; | |
682 | header->th.th_ch_flag = TH_SWEEP_RESP; | |
683 | header->th.th_blk_flag = 0x00; | |
684 | header->th.th_is_xid = 0x00; | |
685 | header->th.th_seq_num = 0x00; | |
686 | header->sw.th_last_seq = ch->th_seq_num; | |
687 | ||
688 | memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH); | |
689 | ||
690 | kfree(header); | |
691 | ||
692 | dev->trans_start = jiffies; | |
693 | skb_queue_tail(&ch->sweep_queue, sweep_skb); | |
694 | ||
695 | fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch); | |
696 | ||
697 | return; | |
698 | ||
699 | done: | |
e2fc8cb4 JF |
700 | grp->in_sweep = 0; |
701 | ctcm_clear_busy_do(dev); | |
702 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
293d984f PT |
703 | |
704 | return; | |
705 | } | |
706 | ||
707 | /* | |
708 | * helper function of ctcmpc_unpack_skb | |
709 | */ | |
710 | static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo) | |
711 | { | |
712 | struct channel *rch = mpcginfo->ch; | |
713 | struct net_device *dev = rch->netdev; | |
261893d3 | 714 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
715 | struct mpc_group *grp = priv->mpcg; |
716 | struct channel *ch = priv->channel[WRITE]; | |
717 | ||
718 | if (do_debug) | |
719 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, | |
aa3f2cb6 | 720 | " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
721 | |
722 | if (grp->in_sweep == 0) { | |
723 | grp->in_sweep = 1; | |
724 | ctcm_test_and_set_busy(dev); | |
725 | grp->sweep_req_pend_num = grp->active_channels[READ]; | |
726 | grp->sweep_rsp_pend_num = grp->active_channels[READ]; | |
727 | } | |
728 | ||
aa3f2cb6 | 729 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
293d984f PT |
730 | |
731 | grp->sweep_req_pend_num--; | |
732 | ctcmpc_send_sweep_resp(ch); | |
733 | kfree(mpcginfo); | |
734 | return; | |
735 | } | |
736 | ||
737 | /* | |
738 | * MPC Group Station FSM definitions | |
739 | */ | |
740 | static const char *mpcg_event_names[] = { | |
741 | [MPCG_EVENT_INOP] = "INOP Condition", | |
742 | [MPCG_EVENT_DISCONC] = "Discontact Received", | |
743 | [MPCG_EVENT_XID0DO] = "Channel Active - Start XID", | |
744 | [MPCG_EVENT_XID2] = "XID2 Received", | |
745 | [MPCG_EVENT_XID2DONE] = "XID0 Complete", | |
746 | [MPCG_EVENT_XID7DONE] = "XID7 Complete", | |
747 | [MPCG_EVENT_TIMER] = "XID Setup Timer", | |
748 | [MPCG_EVENT_DOIO] = "XID DoIO", | |
749 | }; | |
750 | ||
751 | static const char *mpcg_state_names[] = { | |
752 | [MPCG_STATE_RESET] = "Reset", | |
753 | [MPCG_STATE_INOP] = "INOP", | |
754 | [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start", | |
755 | [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete", | |
756 | [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start", | |
757 | [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete", | |
758 | [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start", | |
759 | [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete", | |
760 | [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start", | |
761 | [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ", | |
762 | [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ", | |
763 | [MPCG_STATE_FLOWC] = "FLOW CONTROL ON", | |
764 | [MPCG_STATE_READY] = "READY", | |
765 | }; | |
766 | ||
767 | /* | |
768 | * The MPC Group Station FSM | |
769 | * 22 events | |
770 | */ | |
771 | static const fsm_node mpcg_fsm[] = { | |
772 | { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
773 | { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop }, | |
774 | { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
775 | ||
776 | { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
777 | { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
778 | ||
779 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
780 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
781 | { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
782 | { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
783 | { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
784 | ||
785 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
786 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
787 | { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
788 | { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
789 | { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
790 | ||
791 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, | |
792 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
793 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
794 | { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
795 | { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
796 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
797 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
798 | ||
799 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
800 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
801 | { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
802 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
803 | { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
804 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, | |
805 | ||
806 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
807 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
808 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
809 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
810 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
811 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
812 | ||
813 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, | |
814 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
815 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, | |
816 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
817 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
818 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
819 | ||
820 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, | |
821 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
822 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
823 | { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
824 | { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
825 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
826 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
827 | ||
828 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, | |
829 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, | |
830 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
831 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
832 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout }, | |
833 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid }, | |
834 | ||
835 | { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
836 | { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready }, | |
837 | }; | |
838 | ||
839 | static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm); | |
840 | ||
841 | /* | |
842 | * MPC Group Station FSM action | |
843 | * CTCM_PROTO_MPC only | |
844 | */ | |
845 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg) | |
846 | { | |
847 | struct net_device *dev = arg; | |
261893d3 | 848 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 849 | struct mpc_group *grp = priv->mpcg; |
293d984f | 850 | |
293d984f | 851 | if (grp == NULL) { |
aa3f2cb6 PT |
852 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
853 | "%s(%s): No MPC group", | |
854 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
855 | return; |
856 | } | |
857 | ||
858 | fsm_deltimer(&grp->timer); | |
859 | ||
860 | if (grp->saved_xid2->xid2_flag2 == 0x40) { | |
861 | priv->xid->xid2_flag2 = 0x00; | |
862 | if (grp->estconnfunc) { | |
863 | grp->estconnfunc(grp->port_num, 1, | |
864 | grp->group_max_buflen); | |
865 | grp->estconnfunc = NULL; | |
866 | } else if (grp->allochanfunc) | |
867 | grp->send_qllc_disc = 1; | |
aa3f2cb6 PT |
868 | |
869 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
870 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
871 | "%s(%s): fails", | |
872 | CTCM_FUNTAIL, dev->name); | |
873 | return; | |
293d984f PT |
874 | } |
875 | ||
876 | grp->port_persist = 1; | |
877 | grp->out_of_sequence = 0; | |
878 | grp->estconn_called = 0; | |
879 | ||
880 | tasklet_hi_schedule(&grp->mpc_tasklet2); | |
881 | ||
293d984f | 882 | return; |
293d984f PT |
883 | } |
884 | ||
885 | /* | |
886 | * helper of ctcm_init_netdevice | |
887 | * CTCM_PROTO_MPC only | |
888 | */ | |
889 | void mpc_group_ready(unsigned long adev) | |
890 | { | |
891 | struct net_device *dev = (struct net_device *)adev; | |
261893d3 | 892 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 893 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
894 | struct channel *ch = NULL; |
895 | ||
293d984f | 896 | if (grp == NULL) { |
aa3f2cb6 PT |
897 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
898 | "%s(%s): No MPC group", | |
899 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
900 | return; |
901 | } | |
902 | ||
aa3f2cb6 PT |
903 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
904 | "%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n", | |
905 | CTCM_FUNTAIL, dev->name, grp->group_max_buflen); | |
293d984f PT |
906 | |
907 | fsm_newstate(grp->fsm, MPCG_STATE_READY); | |
908 | ||
909 | /* Put up a read on the channel */ | |
910 | ch = priv->channel[READ]; | |
911 | ch->pdu_seq = 0; | |
aa3f2cb6 PT |
912 | CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" , |
913 | __func__, ch->pdu_seq); | |
293d984f PT |
914 | |
915 | ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch); | |
916 | /* Put the write channel in idle state */ | |
917 | ch = priv->channel[WRITE]; | |
918 | if (ch->collect_len > 0) { | |
919 | spin_lock(&ch->collect_lock); | |
920 | ctcm_purge_skb_queue(&ch->collect_queue); | |
921 | ch->collect_len = 0; | |
922 | spin_unlock(&ch->collect_lock); | |
923 | } | |
924 | ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch); | |
293d984f PT |
925 | ctcm_clear_busy(dev); |
926 | ||
927 | if (grp->estconnfunc) { | |
928 | grp->estconnfunc(grp->port_num, 0, | |
929 | grp->group_max_buflen); | |
930 | grp->estconnfunc = NULL; | |
aa3f2cb6 PT |
931 | } else if (grp->allochanfunc) |
932 | grp->allochanfunc(grp->port_num, grp->group_max_buflen); | |
293d984f PT |
933 | |
934 | grp->send_qllc_disc = 1; | |
935 | grp->changed_side = 0; | |
936 | ||
293d984f PT |
937 | return; |
938 | ||
939 | } | |
940 | ||
941 | /* | |
942 | * Increment the MPC Group Active Channel Counts | |
943 | * helper of dev_action (called from channel fsm) | |
944 | */ | |
aa3f2cb6 | 945 | void mpc_channel_action(struct channel *ch, int direction, int action) |
293d984f | 946 | { |
aa3f2cb6 | 947 | struct net_device *dev = ch->netdev; |
261893d3 | 948 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 949 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
950 | |
951 | if (grp == NULL) { | |
aa3f2cb6 PT |
952 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
953 | "%s(%s): No MPC group", | |
954 | CTCM_FUNTAIL, dev->name); | |
955 | return; | |
293d984f PT |
956 | } |
957 | ||
aa3f2cb6 PT |
958 | CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
959 | ||
960 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, | |
961 | "%s: %i / Grp:%s total_channels=%i, active_channels: " | |
962 | "read=%i, write=%i\n", __func__, action, | |
963 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, | |
964 | grp->active_channels[READ], grp->active_channels[WRITE]); | |
293d984f PT |
965 | |
966 | if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) { | |
967 | grp->num_channel_paths++; | |
968 | grp->active_channels[direction]++; | |
969 | grp->outstanding_xid2++; | |
970 | ch->in_mpcgroup = 1; | |
971 | ||
972 | if (ch->xid_skb != NULL) | |
973 | dev_kfree_skb_any(ch->xid_skb); | |
974 | ||
975 | ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, | |
976 | GFP_ATOMIC | GFP_DMA); | |
977 | if (ch->xid_skb == NULL) { | |
aa3f2cb6 PT |
978 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
979 | "%s(%s): Couldn't alloc ch xid_skb\n", | |
980 | CTCM_FUNTAIL, dev->name); | |
293d984f | 981 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
aa3f2cb6 | 982 | return; |
293d984f PT |
983 | } |
984 | ch->xid_skb_data = ch->xid_skb->data; | |
985 | ch->xid_th = (struct th_header *)ch->xid_skb->data; | |
986 | skb_put(ch->xid_skb, TH_HEADER_LENGTH); | |
987 | ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb); | |
988 | skb_put(ch->xid_skb, XID2_LENGTH); | |
989 | ch->xid_id = skb_tail_pointer(ch->xid_skb); | |
990 | ch->xid_skb->data = ch->xid_skb_data; | |
991 | skb_reset_tail_pointer(ch->xid_skb); | |
992 | ch->xid_skb->len = 0; | |
993 | ||
994 | memcpy(skb_put(ch->xid_skb, grp->xid_skb->len), | |
995 | grp->xid_skb->data, | |
996 | grp->xid_skb->len); | |
997 | ||
998 | ch->xid->xid2_dlc_type = ((CHANNEL_DIRECTION(ch->flags) == READ) | |
999 | ? XID2_READ_SIDE : XID2_WRITE_SIDE); | |
1000 | ||
1001 | if (CHANNEL_DIRECTION(ch->flags) == WRITE) | |
1002 | ch->xid->xid2_buf_len = 0x00; | |
1003 | ||
1004 | ch->xid_skb->data = ch->xid_skb_data; | |
1005 | skb_reset_tail_pointer(ch->xid_skb); | |
1006 | ch->xid_skb->len = 0; | |
1007 | ||
1008 | fsm_newstate(ch->fsm, CH_XID0_PENDING); | |
1009 | ||
1010 | if ((grp->active_channels[READ] > 0) && | |
1011 | (grp->active_channels[WRITE] > 0) && | |
1012 | (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) { | |
1013 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
aa3f2cb6 PT |
1014 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
1015 | "%s: %s: MPC GROUP CHANNELS ACTIVE\n", | |
1016 | __func__, dev->name); | |
293d984f PT |
1017 | } |
1018 | } else if ((action == MPC_CHANNEL_REMOVE) && | |
1019 | (ch->in_mpcgroup == 1)) { | |
1020 | ch->in_mpcgroup = 0; | |
1021 | grp->num_channel_paths--; | |
1022 | grp->active_channels[direction]--; | |
1023 | ||
1024 | if (ch->xid_skb != NULL) | |
1025 | dev_kfree_skb_any(ch->xid_skb); | |
1026 | ch->xid_skb = NULL; | |
1027 | ||
1028 | if (grp->channels_terminating) | |
1029 | goto done; | |
1030 | ||
1031 | if (((grp->active_channels[READ] == 0) && | |
1032 | (grp->active_channels[WRITE] > 0)) | |
1033 | || ((grp->active_channels[WRITE] == 0) && | |
1034 | (grp->active_channels[READ] > 0))) | |
1035 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1036 | } | |
293d984f | 1037 | done: |
aa3f2cb6 PT |
1038 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1039 | "exit %s: %i / Grp:%s total_channels=%i, active_channels: " | |
1040 | "read=%i, write=%i\n", __func__, action, | |
1041 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, | |
1042 | grp->active_channels[READ], grp->active_channels[WRITE]); | |
293d984f | 1043 | |
aa3f2cb6 | 1044 | CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
1045 | } |
1046 | ||
1047 | /** | |
1048 | * Unpack a just received skb and hand it over to | |
1049 | * upper layers. | |
1050 | * special MPC version of unpack_skb. | |
1051 | * | |
1052 | * ch The channel where this skb has been received. | |
1053 | * pskb The received skb. | |
1054 | */ | |
1055 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) | |
1056 | { | |
1057 | struct net_device *dev = ch->netdev; | |
261893d3 | 1058 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1059 | struct mpc_group *grp = priv->mpcg; |
1060 | struct pdu *curr_pdu; | |
1061 | struct mpcg_info *mpcginfo; | |
1062 | struct th_header *header = NULL; | |
1063 | struct th_sweep *sweep = NULL; | |
1064 | int pdu_last_seen = 0; | |
1065 | __u32 new_len; | |
1066 | struct sk_buff *skb; | |
1067 | int skblen; | |
1068 | int sendrc = 0; | |
1069 | ||
aa3f2cb6 PT |
1070 | CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n", |
1071 | __func__, dev->name, smp_processor_id(), ch->id); | |
293d984f PT |
1072 | |
1073 | header = (struct th_header *)pskb->data; | |
1074 | if ((header->th_seg == 0) && | |
1075 | (header->th_ch_flag == 0) && | |
1076 | (header->th_blk_flag == 0) && | |
1077 | (header->th_seq_num == 0)) | |
1078 | /* nothing for us */ goto done; | |
1079 | ||
aa3f2cb6 PT |
1080 | CTCM_PR_DBGDATA("%s: th_header\n", __func__); |
1081 | CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH); | |
1082 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len); | |
293d984f PT |
1083 | |
1084 | pskb->dev = dev; | |
1085 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
1086 | skb_pull(pskb, TH_HEADER_LENGTH); | |
1087 | ||
1088 | if (likely(header->th_ch_flag == TH_HAS_PDU)) { | |
aa3f2cb6 | 1089 | CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__); |
293d984f PT |
1090 | if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) || |
1091 | ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) && | |
1092 | (header->th_seq_num != ch->th_seq_num + 1) && | |
1093 | (ch->th_seq_num != 0))) { | |
1094 | /* This is NOT the next segment * | |
1095 | * we are not the correct race winner * | |
1096 | * go away and let someone else win * | |
1097 | * BUT..this only applies if xid negot * | |
1098 | * is done * | |
1099 | */ | |
1100 | grp->out_of_sequence += 1; | |
1101 | __skb_push(pskb, TH_HEADER_LENGTH); | |
1102 | skb_queue_tail(&ch->io_queue, pskb); | |
aa3f2cb6 PT |
1103 | CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x " |
1104 | "got:%08x\n", __func__, | |
1105 | ch->th_seq_num + 1, header->th_seq_num); | |
293d984f PT |
1106 | |
1107 | return; | |
1108 | } | |
1109 | grp->out_of_sequence = 0; | |
1110 | ch->th_seq_num = header->th_seq_num; | |
1111 | ||
aa3f2cb6 PT |
1112 | CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n", |
1113 | __func__, ch->th_seq_num); | |
293d984f PT |
1114 | |
1115 | if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY)) | |
1116 | goto done; | |
293d984f PT |
1117 | while ((pskb->len > 0) && !pdu_last_seen) { |
1118 | curr_pdu = (struct pdu *)pskb->data; | |
aa3f2cb6 PT |
1119 | |
1120 | CTCM_PR_DBGDATA("%s: pdu_header\n", __func__); | |
1121 | CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH); | |
1122 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", | |
1123 | __func__, pskb->len); | |
1124 | ||
293d984f PT |
1125 | skb_pull(pskb, PDU_HEADER_LENGTH); |
1126 | ||
1127 | if (curr_pdu->pdu_flag & PDU_LAST) | |
1128 | pdu_last_seen = 1; | |
1129 | if (curr_pdu->pdu_flag & PDU_CNTL) | |
1130 | pskb->protocol = htons(ETH_P_SNAP); | |
1131 | else | |
1132 | pskb->protocol = htons(ETH_P_SNA_DIX); | |
1133 | ||
1134 | if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) { | |
aa3f2cb6 PT |
1135 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1136 | "%s(%s): Dropping packet with " | |
1137 | "illegal siize %d", | |
1138 | CTCM_FUNTAIL, dev->name, pskb->len); | |
1139 | ||
293d984f PT |
1140 | priv->stats.rx_dropped++; |
1141 | priv->stats.rx_length_errors++; | |
1142 | goto done; | |
1143 | } | |
1144 | skb_reset_mac_header(pskb); | |
1145 | new_len = curr_pdu->pdu_offset; | |
aa3f2cb6 PT |
1146 | CTCM_PR_DBGDATA("%s: new_len: %04x \n", |
1147 | __func__, new_len); | |
293d984f PT |
1148 | if ((new_len == 0) || (new_len > pskb->len)) { |
1149 | /* should never happen */ | |
1150 | /* pskb len must be hosed...bail out */ | |
aa3f2cb6 PT |
1151 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1152 | "%s(%s): non valid pdu_offset: %04x", | |
1153 | /* "data may be lost", */ | |
1154 | CTCM_FUNTAIL, dev->name, new_len); | |
1155 | goto done; | |
293d984f PT |
1156 | } |
1157 | skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC); | |
1158 | ||
1159 | if (!skb) { | |
aa3f2cb6 PT |
1160 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1161 | "%s(%s): MEMORY allocation error", | |
1162 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1163 | priv->stats.rx_dropped++; |
aa3f2cb6 | 1164 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
293d984f PT |
1165 | goto done; |
1166 | } | |
aa3f2cb6 | 1167 | memcpy(skb_put(skb, new_len), pskb->data, new_len); |
293d984f PT |
1168 | |
1169 | skb_reset_mac_header(skb); | |
1170 | skb->dev = pskb->dev; | |
1171 | skb->protocol = pskb->protocol; | |
1172 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1173 | *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq; | |
1174 | ch->pdu_seq++; | |
1175 | ||
293d984f | 1176 | if (do_debug_data) { |
aa3f2cb6 PT |
1177 | ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n", |
1178 | __func__, ch->pdu_seq); | |
1179 | ctcm_pr_debug("%s: skb:%0lx " | |
1180 | "skb len: %d \n", __func__, | |
1181 | (unsigned long)skb, skb->len); | |
1182 | ctcm_pr_debug("%s: up to 32 bytes " | |
1183 | "of pdu_data sent\n", __func__); | |
293d984f PT |
1184 | ctcmpc_dump32((char *)skb->data, skb->len); |
1185 | } | |
1186 | ||
1187 | skblen = skb->len; | |
1188 | sendrc = netif_rx(skb); | |
1189 | priv->stats.rx_packets++; | |
1190 | priv->stats.rx_bytes += skblen; | |
1191 | skb_pull(pskb, new_len); /* point to next PDU */ | |
1192 | } | |
1193 | } else { | |
1194 | mpcginfo = (struct mpcg_info *) | |
1195 | kmalloc(sizeof(struct mpcg_info), gfp_type()); | |
1196 | if (mpcginfo == NULL) | |
1197 | goto done; | |
1198 | ||
1199 | mpcginfo->ch = ch; | |
1200 | mpcginfo->th = header; | |
1201 | mpcginfo->skb = pskb; | |
aa3f2cb6 PT |
1202 | CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n", |
1203 | __func__); | |
293d984f PT |
1204 | /* it's a sweep? */ |
1205 | sweep = (struct th_sweep *)pskb->data; | |
1206 | mpcginfo->sweep = sweep; | |
1207 | if (header->th_ch_flag == TH_SWEEP_REQ) | |
1208 | mpc_rcvd_sweep_req(mpcginfo); | |
1209 | else if (header->th_ch_flag == TH_SWEEP_RESP) | |
1210 | mpc_rcvd_sweep_resp(mpcginfo); | |
1211 | else if (header->th_blk_flag == TH_DATA_IS_XID) { | |
1212 | struct xid2 *thisxid = (struct xid2 *)pskb->data; | |
1213 | skb_pull(pskb, XID2_LENGTH); | |
1214 | mpcginfo->xid = thisxid; | |
1215 | fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo); | |
1216 | } else if (header->th_blk_flag == TH_DISCONTACT) | |
1217 | fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo); | |
1218 | else if (header->th_seq_num != 0) { | |
aa3f2cb6 PT |
1219 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1220 | "%s(%s): control pkt expected\n", | |
1221 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1222 | priv->stats.rx_dropped++; |
1223 | /* mpcginfo only used for non-data transfers */ | |
1224 | kfree(mpcginfo); | |
1225 | if (do_debug_data) | |
1226 | ctcmpc_dump_skb(pskb, -8); | |
1227 | } | |
1228 | } | |
1229 | done: | |
1230 | ||
1231 | dev_kfree_skb_any(pskb); | |
1232 | if (sendrc == NET_RX_DROP) { | |
2a7c6f2c PT |
1233 | dev_warn(&dev->dev, |
1234 | "The network backlog for %s is exceeded, " | |
1235 | "package dropped\n", __func__); | |
293d984f PT |
1236 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
1237 | } | |
1238 | ||
aa3f2cb6 PT |
1239 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1240 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1241 | } |
1242 | ||
1243 | /** | |
1244 | * tasklet helper for mpc's skb unpacking. | |
1245 | * | |
1246 | * ch The channel to work on. | |
1247 | * Allow flow control back pressure to occur here. | |
1248 | * Throttling back channel can result in excessive | |
1249 | * channel inactivity and system deact of channel | |
1250 | */ | |
1251 | void ctcmpc_bh(unsigned long thischan) | |
1252 | { | |
aa3f2cb6 | 1253 | struct channel *ch = (struct channel *)thischan; |
293d984f | 1254 | struct sk_buff *skb; |
aa3f2cb6 | 1255 | struct net_device *dev = ch->netdev; |
261893d3 | 1256 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1257 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1258 | |
aa3f2cb6 PT |
1259 | CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n", |
1260 | dev->name, smp_processor_id(), __func__, ch->id); | |
293d984f PT |
1261 | /* caller has requested driver to throttle back */ |
1262 | while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) && | |
1263 | (skb = skb_dequeue(&ch->io_queue))) { | |
1264 | ctcmpc_unpack_skb(ch, skb); | |
1265 | if (grp->out_of_sequence > 20) { | |
1266 | /* assume data loss has occurred if */ | |
1267 | /* missing seq_num for extended */ | |
1268 | /* period of time */ | |
1269 | grp->out_of_sequence = 0; | |
1270 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1271 | break; | |
1272 | } | |
1273 | if (skb == skb_peek(&ch->io_queue)) | |
1274 | break; | |
1275 | } | |
aa3f2cb6 PT |
1276 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1277 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1278 | return; |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * MPC Group Initializations | |
1283 | */ | |
1284 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv) | |
1285 | { | |
1286 | struct mpc_group *grp; | |
1287 | ||
aa3f2cb6 PT |
1288 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
1289 | "Enter %s(%p)", CTCM_FUNTAIL, priv); | |
293d984f PT |
1290 | |
1291 | grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL); | |
1292 | if (grp == NULL) | |
1293 | return NULL; | |
1294 | ||
aa3f2cb6 PT |
1295 | grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names, |
1296 | MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm, | |
1297 | mpcg_fsm_len, GFP_KERNEL); | |
293d984f PT |
1298 | if (grp->fsm == NULL) { |
1299 | kfree(grp); | |
1300 | return NULL; | |
1301 | } | |
1302 | ||
1303 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); | |
1304 | fsm_settimer(grp->fsm, &grp->timer); | |
1305 | ||
1306 | grp->xid_skb = | |
1307 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); | |
1308 | if (grp->xid_skb == NULL) { | |
293d984f PT |
1309 | kfree_fsm(grp->fsm); |
1310 | kfree(grp); | |
1311 | return NULL; | |
1312 | } | |
1313 | /* base xid for all channels in group */ | |
1314 | grp->xid_skb_data = grp->xid_skb->data; | |
1315 | grp->xid_th = (struct th_header *)grp->xid_skb->data; | |
1316 | memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH), | |
1317 | &thnorm, TH_HEADER_LENGTH); | |
1318 | ||
aa3f2cb6 | 1319 | grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb); |
293d984f PT |
1320 | memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH); |
1321 | grp->xid->xid2_adj_id = jiffies | 0xfff00000; | |
1322 | grp->xid->xid2_sender_id = jiffies; | |
1323 | ||
1324 | grp->xid_id = skb_tail_pointer(grp->xid_skb); | |
1325 | memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4); | |
1326 | ||
1327 | grp->rcvd_xid_skb = | |
1328 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA); | |
1329 | if (grp->rcvd_xid_skb == NULL) { | |
293d984f PT |
1330 | kfree_fsm(grp->fsm); |
1331 | dev_kfree_skb(grp->xid_skb); | |
1332 | kfree(grp); | |
1333 | return NULL; | |
1334 | } | |
1335 | grp->rcvd_xid_data = grp->rcvd_xid_skb->data; | |
1336 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; | |
1337 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), | |
1338 | &thnorm, TH_HEADER_LENGTH); | |
1339 | grp->saved_xid2 = NULL; | |
1340 | priv->xid = grp->xid; | |
1341 | priv->mpcg = grp; | |
1342 | return grp; | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * The MPC Group Station FSM | |
1347 | */ | |
1348 | ||
1349 | /* | |
1350 | * MPC Group Station FSM actions | |
1351 | * CTCM_PROTO_MPC only | |
1352 | */ | |
1353 | ||
1354 | /** | |
1355 | * NOP action for statemachines | |
1356 | */ | |
1357 | static void mpc_action_nop(fsm_instance *fi, int event, void *arg) | |
1358 | { | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * invoked when the device transitions to dev_stopped | |
1363 | * MPC will stop each individual channel if a single XID failure | |
1364 | * occurs, or will intitiate all channels be stopped if a GROUP | |
1365 | * level failure occurs. | |
1366 | */ | |
1367 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg) | |
1368 | { | |
1369 | struct net_device *dev = arg; | |
1370 | struct ctcm_priv *priv; | |
1371 | struct mpc_group *grp; | |
1372 | int rc = 0; | |
1373 | struct channel *wch, *rch; | |
1374 | ||
aa3f2cb6 PT |
1375 | BUG_ON(dev == NULL); |
1376 | CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name); | |
293d984f | 1377 | |
261893d3 | 1378 | priv = dev->ml_priv; |
293d984f PT |
1379 | grp = priv->mpcg; |
1380 | grp->flow_off_called = 0; | |
293d984f | 1381 | fsm_deltimer(&grp->timer); |
293d984f | 1382 | if (grp->channels_terminating) |
aa3f2cb6 | 1383 | return; |
293d984f PT |
1384 | |
1385 | grp->channels_terminating = 1; | |
293d984f PT |
1386 | grp->saved_state = fsm_getstate(grp->fsm); |
1387 | fsm_newstate(grp->fsm, MPCG_STATE_INOP); | |
1388 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1389 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1390 | "%s(%s): MPC GROUP INOPERATIVE", | |
1391 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1392 | if ((grp->saved_state != MPCG_STATE_RESET) || |
1393 | /* dealloc_channel has been called */ | |
e2fc8cb4 | 1394 | (grp->port_persist == 0)) |
293d984f PT |
1395 | fsm_deltimer(&priv->restart_timer); |
1396 | ||
1397 | wch = priv->channel[WRITE]; | |
1398 | rch = priv->channel[READ]; | |
1399 | ||
1400 | switch (grp->saved_state) { | |
1401 | case MPCG_STATE_RESET: | |
1402 | case MPCG_STATE_INOP: | |
1403 | case MPCG_STATE_XID2INITW: | |
1404 | case MPCG_STATE_XID0IOWAIT: | |
1405 | case MPCG_STATE_XID2INITX: | |
1406 | case MPCG_STATE_XID7INITW: | |
1407 | case MPCG_STATE_XID7INITX: | |
1408 | case MPCG_STATE_XID0IOWAIX: | |
1409 | case MPCG_STATE_XID7INITI: | |
1410 | case MPCG_STATE_XID7INITZ: | |
1411 | case MPCG_STATE_XID7INITF: | |
1412 | break; | |
1413 | case MPCG_STATE_FLOWC: | |
1414 | case MPCG_STATE_READY: | |
1415 | default: | |
1416 | tasklet_hi_schedule(&wch->ch_disc_tasklet); | |
1417 | } | |
1418 | ||
1419 | grp->xid2_tgnum = 0; | |
1420 | grp->group_max_buflen = 0; /*min of all received */ | |
1421 | grp->outstanding_xid2 = 0; | |
1422 | grp->outstanding_xid7 = 0; | |
1423 | grp->outstanding_xid7_p2 = 0; | |
1424 | grp->saved_xid2 = NULL; | |
1425 | grp->xidnogood = 0; | |
1426 | grp->changed_side = 0; | |
1427 | ||
1428 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; | |
1429 | skb_reset_tail_pointer(grp->rcvd_xid_skb); | |
1430 | grp->rcvd_xid_skb->len = 0; | |
1431 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; | |
1432 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm, | |
1433 | TH_HEADER_LENGTH); | |
1434 | ||
1435 | if (grp->send_qllc_disc == 1) { | |
1436 | grp->send_qllc_disc = 0; | |
1437 | rc = mpc_send_qllc_discontact(dev); | |
1438 | } | |
1439 | ||
1440 | /* DO NOT issue DEV_EVENT_STOP directly out of this code */ | |
1441 | /* This can result in INOP of VTAM PU due to halting of */ | |
1442 | /* outstanding IO which causes a sense to be returned */ | |
1443 | /* Only about 3 senses are allowed and then IOS/VTAM will*/ | |
aa3f2cb6 PT |
1444 | /* become unreachable without manual intervention */ |
1445 | if ((grp->port_persist == 1) || (grp->alloc_called)) { | |
293d984f PT |
1446 | grp->alloc_called = 0; |
1447 | fsm_deltimer(&priv->restart_timer); | |
aa3f2cb6 | 1448 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev); |
293d984f PT |
1449 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
1450 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1451 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1452 | "%s(%s): MPC GROUP RECOVERY SCHEDULED", | |
1453 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1454 | } else { |
1455 | fsm_deltimer(&priv->restart_timer); | |
1456 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev); | |
1457 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); | |
aa3f2cb6 PT |
1458 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1459 | "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED", | |
1460 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1461 | } |
293d984f PT |
1462 | } |
1463 | ||
1464 | /** | |
1465 | * Handle mpc group action timeout. | |
1466 | * MPC Group Station FSM action | |
1467 | * CTCM_PROTO_MPC only | |
1468 | * | |
1469 | * fi An instance of an mpc_group fsm. | |
1470 | * event The event, just happened. | |
1471 | * arg Generic pointer, casted from net_device * upon call. | |
1472 | */ | |
1473 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg) | |
1474 | { | |
1475 | struct net_device *dev = arg; | |
1476 | struct ctcm_priv *priv; | |
1477 | struct mpc_group *grp; | |
1478 | struct channel *wch; | |
1479 | struct channel *rch; | |
1480 | ||
aa3f2cb6 | 1481 | BUG_ON(dev == NULL); |
293d984f | 1482 | |
261893d3 | 1483 | priv = dev->ml_priv; |
293d984f PT |
1484 | grp = priv->mpcg; |
1485 | wch = priv->channel[WRITE]; | |
1486 | rch = priv->channel[READ]; | |
1487 | ||
1488 | switch (fsm_getstate(grp->fsm)) { | |
1489 | case MPCG_STATE_XID2INITW: | |
1490 | /* Unless there is outstanding IO on the */ | |
1491 | /* channel just return and wait for ATTN */ | |
1492 | /* interrupt to begin XID negotiations */ | |
1493 | if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) && | |
1494 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) | |
1495 | break; | |
1496 | default: | |
1497 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1498 | } | |
1499 | ||
aa3f2cb6 PT |
1500 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1501 | "%s: dev=%s exit", | |
1502 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1503 | return; |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * MPC Group Station FSM action | |
1508 | * CTCM_PROTO_MPC only | |
1509 | */ | |
1510 | void mpc_action_discontact(fsm_instance *fi, int event, void *arg) | |
1511 | { | |
1512 | struct mpcg_info *mpcginfo = arg; | |
1513 | struct channel *ch = mpcginfo->ch; | |
aa3f2cb6 PT |
1514 | struct net_device *dev; |
1515 | struct ctcm_priv *priv; | |
1516 | struct mpc_group *grp; | |
293d984f | 1517 | |
aa3f2cb6 PT |
1518 | if (ch) { |
1519 | dev = ch->netdev; | |
1520 | if (dev) { | |
261893d3 | 1521 | priv = dev->ml_priv; |
aa3f2cb6 PT |
1522 | if (priv) { |
1523 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, | |
1524 | "%s: %s: %s\n", | |
1525 | CTCM_FUNTAIL, dev->name, ch->id); | |
1526 | grp = priv->mpcg; | |
1527 | grp->send_qllc_disc = 1; | |
1528 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1529 | } | |
1530 | } | |
293d984f PT |
1531 | } |
1532 | ||
293d984f PT |
1533 | return; |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * MPC Group Station - not part of FSM | |
1538 | * CTCM_PROTO_MPC only | |
1539 | * called from add_channel in ctcm_main.c | |
1540 | */ | |
1541 | void mpc_action_send_discontact(unsigned long thischan) | |
1542 | { | |
aa3f2cb6 PT |
1543 | int rc; |
1544 | struct channel *ch = (struct channel *)thischan; | |
1545 | unsigned long saveflags = 0; | |
293d984f PT |
1546 | |
1547 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1548 | rc = ccw_device_start(ch->cdev, &ch->ccw[15], | |
1549 | (unsigned long)ch, 0xff, 0); | |
1550 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
1551 | ||
1552 | if (rc != 0) { | |
aa3f2cb6 | 1553 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
1554 | } |
1555 | ||
293d984f PT |
1556 | return; |
1557 | } | |
1558 | ||
1559 | ||
1560 | /* | |
1561 | * helper function of mpc FSM | |
1562 | * CTCM_PROTO_MPC only | |
1563 | * mpc_action_rcvd_xid7 | |
1564 | */ | |
1565 | static int mpc_validate_xid(struct mpcg_info *mpcginfo) | |
1566 | { | |
aa3f2cb6 PT |
1567 | struct channel *ch = mpcginfo->ch; |
1568 | struct net_device *dev = ch->netdev; | |
261893d3 | 1569 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1570 | struct mpc_group *grp = priv->mpcg; |
aa3f2cb6 PT |
1571 | struct xid2 *xid = mpcginfo->xid; |
1572 | int rc = 0; | |
1573 | __u64 our_id = 0; | |
1574 | __u64 their_id = 0; | |
1575 | int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH; | |
293d984f | 1576 | |
aa3f2cb6 | 1577 | CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid); |
293d984f | 1578 | |
aa3f2cb6 | 1579 | if (xid == NULL) { |
293d984f | 1580 | rc = 1; |
aa3f2cb6 PT |
1581 | /* XID REJECTED: xid == NULL */ |
1582 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1583 | "%s(%s): xid = NULL", | |
1584 | CTCM_FUNTAIL, ch->id); | |
1585 | goto done; | |
293d984f PT |
1586 | } |
1587 | ||
aa3f2cb6 | 1588 | CTCM_D3_DUMP((char *)xid, XID2_LENGTH); |
293d984f PT |
1589 | |
1590 | /*the received direction should be the opposite of ours */ | |
1591 | if (((CHANNEL_DIRECTION(ch->flags) == READ) ? XID2_WRITE_SIDE : | |
1592 | XID2_READ_SIDE) != xid->xid2_dlc_type) { | |
aa3f2cb6 PT |
1593 | rc = 2; |
1594 | /* XID REJECTED: r/w channel pairing mismatch */ | |
1595 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1596 | "%s(%s): r/w channel pairing mismatch", | |
1597 | CTCM_FUNTAIL, ch->id); | |
1598 | goto done; | |
293d984f PT |
1599 | } |
1600 | ||
1601 | if (xid->xid2_dlc_type == XID2_READ_SIDE) { | |
aa3f2cb6 PT |
1602 | CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__, |
1603 | grp->group_max_buflen, xid->xid2_buf_len); | |
293d984f | 1604 | |
aa3f2cb6 PT |
1605 | if (grp->group_max_buflen == 0 || grp->group_max_buflen > |
1606 | xid->xid2_buf_len - len) | |
293d984f PT |
1607 | grp->group_max_buflen = xid->xid2_buf_len - len; |
1608 | } | |
1609 | ||
aa3f2cb6 | 1610 | if (grp->saved_xid2 == NULL) { |
293d984f PT |
1611 | grp->saved_xid2 = |
1612 | (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb); | |
1613 | ||
1614 | memcpy(skb_put(grp->rcvd_xid_skb, | |
1615 | XID2_LENGTH), xid, XID2_LENGTH); | |
1616 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; | |
1617 | ||
1618 | skb_reset_tail_pointer(grp->rcvd_xid_skb); | |
1619 | grp->rcvd_xid_skb->len = 0; | |
1620 | ||
1621 | /* convert two 32 bit numbers into 1 64 bit for id compare */ | |
1622 | our_id = (__u64)priv->xid->xid2_adj_id; | |
1623 | our_id = our_id << 32; | |
1624 | our_id = our_id + priv->xid->xid2_sender_id; | |
1625 | their_id = (__u64)xid->xid2_adj_id; | |
1626 | their_id = their_id << 32; | |
1627 | their_id = their_id + xid->xid2_sender_id; | |
1628 | /* lower id assume the xside role */ | |
1629 | if (our_id < their_id) { | |
1630 | grp->roll = XSIDE; | |
aa3f2cb6 PT |
1631 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1632 | "%s(%s): WE HAVE LOW ID - TAKE XSIDE", | |
1633 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1634 | } else { |
1635 | grp->roll = YSIDE; | |
aa3f2cb6 PT |
1636 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1637 | "%s(%s): WE HAVE HIGH ID - TAKE YSIDE", | |
1638 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1639 | } |
1640 | ||
1641 | } else { | |
1642 | if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) { | |
aa3f2cb6 PT |
1643 | rc = 3; |
1644 | /* XID REJECTED: xid flag byte4 mismatch */ | |
1645 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1646 | "%s(%s): xid flag byte4 mismatch", | |
1647 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1648 | } |
1649 | if (xid->xid2_flag2 == 0x40) { | |
aa3f2cb6 PT |
1650 | rc = 4; |
1651 | /* XID REJECTED - xid NOGOOD */ | |
1652 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1653 | "%s(%s): xid NOGOOD", | |
1654 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1655 | } |
1656 | if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) { | |
aa3f2cb6 PT |
1657 | rc = 5; |
1658 | /* XID REJECTED - Adjacent Station ID Mismatch */ | |
1659 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1660 | "%s(%s): Adjacent Station ID Mismatch", | |
1661 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1662 | } |
1663 | if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) { | |
aa3f2cb6 PT |
1664 | rc = 6; |
1665 | /* XID REJECTED - Sender Address Mismatch */ | |
1666 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1667 | "%s(%s): Sender Address Mismatch", | |
1668 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1669 | } |
1670 | } | |
aa3f2cb6 PT |
1671 | done: |
1672 | if (rc) { | |
2a7c6f2c PT |
1673 | dev_warn(&dev->dev, |
1674 | "The XID used in the MPC protocol is not valid, " | |
1675 | "rc = %d\n", rc); | |
293d984f PT |
1676 | priv->xid->xid2_flag2 = 0x40; |
1677 | grp->saved_xid2->xid2_flag2 = 0x40; | |
293d984f PT |
1678 | } |
1679 | ||
293d984f PT |
1680 | return rc; |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * MPC Group Station FSM action | |
1685 | * CTCM_PROTO_MPC only | |
1686 | */ | |
1687 | static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side) | |
1688 | { | |
1689 | struct channel *ch = arg; | |
293d984f PT |
1690 | int rc = 0; |
1691 | int gotlock = 0; | |
1692 | unsigned long saveflags = 0; /* avoids compiler warning with | |
aa3f2cb6 | 1693 | spin_unlock_irqrestore */ |
293d984f | 1694 | |
aa3f2cb6 PT |
1695 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1696 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1697 | |
1698 | if (ctcm_checkalloc_buffer(ch)) | |
1699 | goto done; | |
1700 | ||
aa3f2cb6 PT |
1701 | /* |
1702 | * skb data-buffer referencing: | |
1703 | */ | |
293d984f PT |
1704 | ch->trans_skb->data = ch->trans_skb_data; |
1705 | skb_reset_tail_pointer(ch->trans_skb); | |
1706 | ch->trans_skb->len = 0; | |
1707 | /* result of the previous 3 statements is NOT always | |
1708 | * already set after ctcm_checkalloc_buffer | |
1709 | * because of possible reuse of the trans_skb | |
1710 | */ | |
1711 | memset(ch->trans_skb->data, 0, 16); | |
1712 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; | |
1713 | /* check is main purpose here: */ | |
1714 | skb_put(ch->trans_skb, TH_HEADER_LENGTH); | |
1715 | ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb); | |
1716 | /* check is main purpose here: */ | |
1717 | skb_put(ch->trans_skb, XID2_LENGTH); | |
1718 | ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb); | |
1719 | /* cleanup back to startpoint */ | |
1720 | ch->trans_skb->data = ch->trans_skb_data; | |
1721 | skb_reset_tail_pointer(ch->trans_skb); | |
1722 | ch->trans_skb->len = 0; | |
1723 | ||
1724 | /* non-checking rewrite of above skb data-buffer referencing: */ | |
1725 | /* | |
1726 | memset(ch->trans_skb->data, 0, 16); | |
1727 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; | |
1728 | ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH); | |
1729 | ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH; | |
1730 | */ | |
1731 | ||
1732 | ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1733 | ch->ccw[8].count = 0; | |
1734 | ch->ccw[8].cda = 0x00; | |
1735 | ||
aa3f2cb6 PT |
1736 | if (!(ch->xid_th && ch->xid && ch->xid_id)) |
1737 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, | |
1738 | "%s(%s): xid_th=%p, xid=%p, xid_id=%p", | |
1739 | CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id); | |
1740 | ||
293d984f PT |
1741 | if (side == XSIDE) { |
1742 | /* mpc_action_xside_xid */ | |
aa3f2cb6 PT |
1743 | if (ch->xid_th == NULL) |
1744 | goto done; | |
293d984f PT |
1745 | ch->ccw[9].cmd_code = CCW_CMD_WRITE; |
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->xid_th); | |
1749 | ||
aa3f2cb6 PT |
1750 | if (ch->xid == NULL) |
1751 | goto done; | |
293d984f PT |
1752 | ch->ccw[10].cmd_code = CCW_CMD_WRITE; |
1753 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1754 | ch->ccw[10].count = XID2_LENGTH; | |
1755 | ch->ccw[10].cda = virt_to_phys(ch->xid); | |
1756 | ||
1757 | ch->ccw[11].cmd_code = CCW_CMD_READ; | |
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->rcvd_xid_th); | |
1761 | ||
1762 | ch->ccw[12].cmd_code = CCW_CMD_READ; | |
1763 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1764 | ch->ccw[12].count = XID2_LENGTH; | |
1765 | ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid); | |
1766 | ||
1767 | ch->ccw[13].cmd_code = CCW_CMD_READ; | |
1768 | ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id); | |
1769 | ||
1770 | } else { /* side == YSIDE : mpc_action_yside_xid */ | |
1771 | ch->ccw[9].cmd_code = CCW_CMD_READ; | |
1772 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1773 | ch->ccw[9].count = TH_HEADER_LENGTH; | |
1774 | ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th); | |
1775 | ||
1776 | ch->ccw[10].cmd_code = CCW_CMD_READ; | |
1777 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1778 | ch->ccw[10].count = XID2_LENGTH; | |
1779 | ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid); | |
1780 | ||
aa3f2cb6 PT |
1781 | if (ch->xid_th == NULL) |
1782 | goto done; | |
293d984f PT |
1783 | ch->ccw[11].cmd_code = CCW_CMD_WRITE; |
1784 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1785 | ch->ccw[11].count = TH_HEADER_LENGTH; | |
1786 | ch->ccw[11].cda = virt_to_phys(ch->xid_th); | |
1787 | ||
aa3f2cb6 PT |
1788 | if (ch->xid == NULL) |
1789 | goto done; | |
293d984f PT |
1790 | ch->ccw[12].cmd_code = CCW_CMD_WRITE; |
1791 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1792 | ch->ccw[12].count = XID2_LENGTH; | |
1793 | ch->ccw[12].cda = virt_to_phys(ch->xid); | |
1794 | ||
aa3f2cb6 PT |
1795 | if (ch->xid_id == NULL) |
1796 | goto done; | |
293d984f PT |
1797 | ch->ccw[13].cmd_code = CCW_CMD_WRITE; |
1798 | ch->ccw[13].cda = virt_to_phys(ch->xid_id); | |
1799 | ||
1800 | } | |
1801 | ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1802 | ch->ccw[13].count = 4; | |
1803 | ||
1804 | ch->ccw[14].cmd_code = CCW_CMD_NOOP; | |
1805 | ch->ccw[14].flags = CCW_FLAG_SLI; | |
1806 | ch->ccw[14].count = 0; | |
1807 | ch->ccw[14].cda = 0; | |
1808 | ||
aa3f2cb6 PT |
1809 | CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7); |
1810 | CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH); | |
1811 | CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH); | |
1812 | CTCM_D3_DUMP((char *)ch->xid_id, 4); | |
293d984f | 1813 | |
293d984f PT |
1814 | if (!in_irq()) { |
1815 | /* Such conditional locking is a known problem for | |
1816 | * sparse because its static undeterministic. | |
1817 | * Warnings should be ignored here. */ | |
1818 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1819 | gotlock = 1; | |
1820 | } | |
1821 | ||
1822 | fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch); | |
1823 | rc = ccw_device_start(ch->cdev, &ch->ccw[8], | |
1824 | (unsigned long)ch, 0xff, 0); | |
1825 | ||
1826 | if (gotlock) /* see remark above about conditional locking */ | |
1827 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
1828 | ||
1829 | if (rc != 0) { | |
293d984f PT |
1830 | ctcm_ccw_check_rc(ch, rc, |
1831 | (side == XSIDE) ? "x-side XID" : "y-side XID"); | |
1832 | } | |
1833 | ||
1834 | done: | |
aa3f2cb6 PT |
1835 | CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n", |
1836 | __func__, ch, ch->id); | |
293d984f PT |
1837 | return; |
1838 | ||
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * MPC Group Station FSM action | |
1843 | * CTCM_PROTO_MPC only | |
1844 | */ | |
1845 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg) | |
1846 | { | |
1847 | mpc_action_side_xid(fsm, arg, XSIDE); | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * MPC Group Station FSM action | |
1852 | * CTCM_PROTO_MPC only | |
1853 | */ | |
1854 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg) | |
1855 | { | |
1856 | mpc_action_side_xid(fsm, arg, YSIDE); | |
1857 | } | |
1858 | ||
1859 | /* | |
1860 | * MPC Group Station FSM action | |
1861 | * CTCM_PROTO_MPC only | |
1862 | */ | |
1863 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg) | |
1864 | { | |
aa3f2cb6 PT |
1865 | struct channel *ch = arg; |
1866 | struct net_device *dev = ch->netdev; | |
261893d3 | 1867 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1868 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1869 | |
aa3f2cb6 PT |
1870 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1871 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1872 | |
1873 | if (ch->xid == NULL) { | |
aa3f2cb6 PT |
1874 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1875 | "%s(%s): ch->xid == NULL", | |
1876 | CTCM_FUNTAIL, dev->name); | |
1877 | return; | |
293d984f PT |
1878 | } |
1879 | ||
1880 | fsm_newstate(ch->fsm, CH_XID0_INPROGRESS); | |
1881 | ||
1882 | ch->xid->xid2_option = XID2_0; | |
1883 | ||
1884 | switch (fsm_getstate(grp->fsm)) { | |
1885 | case MPCG_STATE_XID2INITW: | |
1886 | case MPCG_STATE_XID2INITX: | |
1887 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1888 | break; | |
1889 | case MPCG_STATE_XID0IOWAIT: | |
1890 | case MPCG_STATE_XID0IOWAIX: | |
1891 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1892 | break; | |
1893 | } | |
1894 | ||
1895 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1896 | ||
293d984f | 1897 | return; |
293d984f PT |
1898 | } |
1899 | ||
1900 | /* | |
1901 | * MPC Group Station FSM action | |
1902 | * CTCM_PROTO_MPC only | |
1903 | */ | |
1904 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg) | |
1905 | { | |
1906 | struct net_device *dev = arg; | |
261893d3 | 1907 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1908 | struct mpc_group *grp = NULL; |
293d984f | 1909 | int direction; |
293d984f PT |
1910 | int send = 0; |
1911 | ||
aa3f2cb6 PT |
1912 | if (priv) |
1913 | grp = priv->mpcg; | |
e2fc8cb4 | 1914 | if (grp == NULL) |
aa3f2cb6 | 1915 | return; |
293d984f PT |
1916 | |
1917 | for (direction = READ; direction <= WRITE; direction++) { | |
1918 | struct channel *ch = priv->channel[direction]; | |
1919 | struct xid2 *thisxid = ch->xid; | |
1920 | ch->xid_skb->data = ch->xid_skb_data; | |
1921 | skb_reset_tail_pointer(ch->xid_skb); | |
1922 | ch->xid_skb->len = 0; | |
1923 | thisxid->xid2_option = XID2_7; | |
1924 | send = 0; | |
1925 | ||
1926 | /* xid7 phase 1 */ | |
1927 | if (grp->outstanding_xid7_p2 > 0) { | |
1928 | if (grp->roll == YSIDE) { | |
1929 | if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) { | |
1930 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); | |
1931 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1932 | memcpy(skb_put(ch->xid_skb, | |
1933 | TH_HEADER_LENGTH), | |
1934 | &thdummy, TH_HEADER_LENGTH); | |
1935 | send = 1; | |
1936 | } | |
1937 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) { | |
1938 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); | |
1939 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1940 | memcpy(skb_put(ch->xid_skb, | |
1941 | TH_HEADER_LENGTH), | |
1942 | &thnorm, TH_HEADER_LENGTH); | |
1943 | send = 1; | |
1944 | } | |
1945 | } else { | |
1946 | /* xid7 phase 2 */ | |
1947 | if (grp->roll == YSIDE) { | |
1948 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) { | |
1949 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); | |
1950 | memcpy(skb_put(ch->xid_skb, | |
1951 | TH_HEADER_LENGTH), | |
1952 | &thnorm, TH_HEADER_LENGTH); | |
1953 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1954 | send = 1; | |
1955 | } | |
1956 | } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) { | |
1957 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); | |
1958 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; | |
1959 | memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH), | |
1960 | &thdummy, TH_HEADER_LENGTH); | |
1961 | send = 1; | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | if (send) | |
1966 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1967 | } | |
1968 | ||
293d984f PT |
1969 | return; |
1970 | } | |
1971 | ||
1972 | /* | |
1973 | * MPC Group Station FSM action | |
1974 | * CTCM_PROTO_MPC only | |
1975 | */ | |
1976 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) | |
1977 | { | |
1978 | ||
aa3f2cb6 PT |
1979 | struct mpcg_info *mpcginfo = arg; |
1980 | struct channel *ch = mpcginfo->ch; | |
1981 | struct net_device *dev = ch->netdev; | |
261893d3 | 1982 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1983 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1984 | |
aa3f2cb6 PT |
1985 | CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n", |
1986 | __func__, ch->id, grp->outstanding_xid2, | |
1987 | grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
293d984f PT |
1988 | |
1989 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING) | |
1990 | fsm_newstate(ch->fsm, CH_XID7_PENDING); | |
1991 | ||
1992 | grp->outstanding_xid2--; | |
1993 | grp->outstanding_xid7++; | |
1994 | grp->outstanding_xid7_p2++; | |
1995 | ||
1996 | /* must change state before validating xid to */ | |
1997 | /* properly handle interim interrupts received*/ | |
1998 | switch (fsm_getstate(grp->fsm)) { | |
1999 | case MPCG_STATE_XID2INITW: | |
2000 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX); | |
2001 | mpc_validate_xid(mpcginfo); | |
2002 | break; | |
2003 | case MPCG_STATE_XID0IOWAIT: | |
2004 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX); | |
2005 | mpc_validate_xid(mpcginfo); | |
2006 | break; | |
2007 | case MPCG_STATE_XID2INITX: | |
2008 | if (grp->outstanding_xid2 == 0) { | |
2009 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW); | |
2010 | mpc_validate_xid(mpcginfo); | |
2011 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); | |
2012 | } | |
2013 | break; | |
2014 | case MPCG_STATE_XID0IOWAIX: | |
2015 | if (grp->outstanding_xid2 == 0) { | |
2016 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI); | |
2017 | mpc_validate_xid(mpcginfo); | |
2018 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); | |
2019 | } | |
2020 | break; | |
2021 | } | |
2022 | kfree(mpcginfo); | |
2023 | ||
aa3f2cb6 PT |
2024 | CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n", |
2025 | __func__, ch->id, grp->outstanding_xid2, | |
2026 | grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
2027 | CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n", | |
2028 | __func__, ch->id, | |
2029 | fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm)); | |
293d984f PT |
2030 | return; |
2031 | ||
2032 | } | |
2033 | ||
2034 | ||
2035 | /* | |
2036 | * MPC Group Station FSM action | |
2037 | * CTCM_PROTO_MPC only | |
2038 | */ | |
2039 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) | |
2040 | { | |
2041 | struct mpcg_info *mpcginfo = arg; | |
2042 | struct channel *ch = mpcginfo->ch; | |
2043 | struct net_device *dev = ch->netdev; | |
261893d3 | 2044 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2045 | struct mpc_group *grp = priv->mpcg; |
2046 | ||
aa3f2cb6 PT |
2047 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
2048 | __func__, smp_processor_id(), ch, ch->id); | |
2049 | CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n", | |
2050 | __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2); | |
293d984f PT |
2051 | |
2052 | grp->outstanding_xid7--; | |
2053 | ch->xid_skb->data = ch->xid_skb_data; | |
2054 | skb_reset_tail_pointer(ch->xid_skb); | |
2055 | ch->xid_skb->len = 0; | |
2056 | ||
2057 | switch (fsm_getstate(grp->fsm)) { | |
2058 | case MPCG_STATE_XID7INITI: | |
2059 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ); | |
2060 | mpc_validate_xid(mpcginfo); | |
2061 | break; | |
2062 | case MPCG_STATE_XID7INITW: | |
2063 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX); | |
2064 | mpc_validate_xid(mpcginfo); | |
2065 | break; | |
2066 | case MPCG_STATE_XID7INITZ: | |
2067 | case MPCG_STATE_XID7INITX: | |
2068 | if (grp->outstanding_xid7 == 0) { | |
2069 | if (grp->outstanding_xid7_p2 > 0) { | |
2070 | grp->outstanding_xid7 = | |
2071 | grp->outstanding_xid7_p2; | |
2072 | grp->outstanding_xid7_p2 = 0; | |
2073 | } else | |
2074 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF); | |
2075 | ||
2076 | mpc_validate_xid(mpcginfo); | |
2077 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
2078 | break; | |
2079 | } | |
2080 | mpc_validate_xid(mpcginfo); | |
2081 | break; | |
2082 | } | |
293d984f | 2083 | kfree(mpcginfo); |
293d984f | 2084 | return; |
293d984f PT |
2085 | } |
2086 | ||
2087 | /* | |
2088 | * mpc_action helper of an MPC Group Station FSM action | |
2089 | * CTCM_PROTO_MPC only | |
2090 | */ | |
2091 | static int mpc_send_qllc_discontact(struct net_device *dev) | |
2092 | { | |
293d984f PT |
2093 | __u32 new_len = 0; |
2094 | struct sk_buff *skb; | |
2095 | struct qllc *qllcptr; | |
261893d3 | 2096 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2097 | struct mpc_group *grp = priv->mpcg; |
293d984f | 2098 | |
aa3f2cb6 PT |
2099 | CTCM_PR_DEBUG("%s: GROUP STATE: %s\n", |
2100 | __func__, mpcg_state_names[grp->saved_state]); | |
293d984f PT |
2101 | |
2102 | switch (grp->saved_state) { | |
2103 | /* | |
2104 | * establish conn callback function is | |
2105 | * preferred method to report failure | |
2106 | */ | |
2107 | case MPCG_STATE_XID0IOWAIT: | |
2108 | case MPCG_STATE_XID0IOWAIX: | |
2109 | case MPCG_STATE_XID7INITI: | |
2110 | case MPCG_STATE_XID7INITZ: | |
2111 | case MPCG_STATE_XID2INITW: | |
2112 | case MPCG_STATE_XID2INITX: | |
2113 | case MPCG_STATE_XID7INITW: | |
2114 | case MPCG_STATE_XID7INITX: | |
2115 | if (grp->estconnfunc) { | |
2116 | grp->estconnfunc(grp->port_num, -1, 0); | |
2117 | grp->estconnfunc = NULL; | |
2118 | break; | |
2119 | } | |
2120 | case MPCG_STATE_FLOWC: | |
2121 | case MPCG_STATE_READY: | |
2122 | grp->send_qllc_disc = 2; | |
2123 | new_len = sizeof(struct qllc); | |
2124 | qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA); | |
2125 | if (qllcptr == NULL) { | |
aa3f2cb6 PT |
2126 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2127 | "%s(%s): qllcptr allocation error", | |
2128 | CTCM_FUNTAIL, dev->name); | |
2129 | return -ENOMEM; | |
293d984f PT |
2130 | } |
2131 | ||
2132 | qllcptr->qllc_address = 0xcc; | |
2133 | qllcptr->qllc_commands = 0x03; | |
2134 | ||
2135 | skb = __dev_alloc_skb(new_len, GFP_ATOMIC); | |
2136 | ||
2137 | if (skb == NULL) { | |
aa3f2cb6 PT |
2138 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2139 | "%s(%s): skb allocation error", | |
2140 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2141 | priv->stats.rx_dropped++; |
293d984f | 2142 | kfree(qllcptr); |
aa3f2cb6 | 2143 | return -ENOMEM; |
293d984f PT |
2144 | } |
2145 | ||
2146 | memcpy(skb_put(skb, new_len), qllcptr, new_len); | |
2147 | kfree(qllcptr); | |
2148 | ||
2149 | if (skb_headroom(skb) < 4) { | |
aa3f2cb6 PT |
2150 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2151 | "%s(%s): skb_headroom error", | |
2152 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2153 | dev_kfree_skb_any(skb); |
aa3f2cb6 | 2154 | return -ENOMEM; |
293d984f PT |
2155 | } |
2156 | ||
2157 | *((__u32 *)skb_push(skb, 4)) = priv->channel[READ]->pdu_seq; | |
2158 | priv->channel[READ]->pdu_seq++; | |
aa3f2cb6 PT |
2159 | CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n", |
2160 | __func__, priv->channel[READ]->pdu_seq); | |
293d984f PT |
2161 | |
2162 | /* receipt of CC03 resets anticipated sequence number on | |
2163 | receiving side */ | |
2164 | priv->channel[READ]->pdu_seq = 0x00; | |
2165 | skb_reset_mac_header(skb); | |
2166 | skb->dev = dev; | |
2167 | skb->protocol = htons(ETH_P_SNAP); | |
2168 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2169 | ||
aa3f2cb6 | 2170 | CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4)); |
293d984f PT |
2171 | |
2172 | netif_rx(skb); | |
2173 | break; | |
2174 | default: | |
2175 | break; | |
2176 | ||
2177 | } | |
2178 | ||
aa3f2cb6 | 2179 | return 0; |
293d984f PT |
2180 | } |
2181 | /* --- This is the END my friend --- */ | |
2182 |