Commit | Line | Data |
---|---|---|
293d984f | 1 | /* |
293d984f PT |
2 | * Copyright IBM Corp. 2004, 2007 |
3 | * Authors: Belinda Thompson (belindat@us.ibm.com) | |
4 | * Andy Richter (richtera@us.ibm.com) | |
5 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
6 | */ | |
7 | ||
8 | /* | |
9 | This module exports functions to be used by CCS: | |
10 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
11 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
12 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
13 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
14 | */ | |
15 | ||
16 | #undef DEBUG | |
17 | #undef DEBUGDATA | |
18 | #undef DEBUGCCW | |
19 | ||
2a7c6f2c PT |
20 | #define KMSG_COMPONENT "ctcm" |
21 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
22 | ||
293d984f PT |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/timer.h> | |
31 | #include <linux/sched.h> | |
32 | ||
33 | #include <linux/signal.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/proc_fs.h> | |
36 | ||
37 | #include <linux/ip.h> | |
38 | #include <linux/if_arp.h> | |
39 | #include <linux/tcp.h> | |
40 | #include <linux/skbuff.h> | |
41 | #include <linux/ctype.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <net/dst.h> | |
44 | ||
45 | #include <linux/io.h> /* instead of <asm/io.h> ok ? */ | |
46 | #include <asm/ccwdev.h> | |
47 | #include <asm/ccwgroup.h> | |
48 | #include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */ | |
49 | #include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */ | |
50 | #include <linux/wait.h> | |
51 | #include <linux/moduleparam.h> | |
52 | #include <asm/idals.h> | |
53 | ||
293d984f | 54 | #include "ctcm_main.h" |
ce1f8938 | 55 | #include "ctcm_mpc.h" |
293d984f PT |
56 | #include "ctcm_fsms.h" |
57 | ||
58 | static const struct xid2 init_xid = { | |
59 | .xid2_type_id = XID_FM2, | |
60 | .xid2_len = 0x45, | |
61 | .xid2_adj_id = 0, | |
62 | .xid2_rlen = 0x31, | |
63 | .xid2_resv1 = 0, | |
64 | .xid2_flag1 = 0, | |
65 | .xid2_fmtt = 0, | |
66 | .xid2_flag4 = 0x80, | |
67 | .xid2_resv2 = 0, | |
68 | .xid2_tgnum = 0, | |
69 | .xid2_sender_id = 0, | |
70 | .xid2_flag2 = 0, | |
71 | .xid2_option = XID2_0, | |
72 | .xid2_resv3 = "\x00", | |
73 | .xid2_resv4 = 0, | |
74 | .xid2_dlc_type = XID2_READ_SIDE, | |
75 | .xid2_resv5 = 0, | |
76 | .xid2_mpc_flag = 0, | |
77 | .xid2_resv6 = 0, | |
78 | .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35), | |
79 | }; | |
80 | ||
81 | static const struct th_header thnorm = { | |
82 | .th_seg = 0x00, | |
83 | .th_ch_flag = TH_IS_XID, | |
84 | .th_blk_flag = TH_DATA_IS_XID, | |
85 | .th_is_xid = 0x01, | |
86 | .th_seq_num = 0x00000000, | |
87 | }; | |
88 | ||
89 | static const struct th_header thdummy = { | |
90 | .th_seg = 0x00, | |
91 | .th_ch_flag = 0x00, | |
92 | .th_blk_flag = TH_DATA_IS_XID, | |
93 | .th_is_xid = 0x01, | |
94 | .th_seq_num = 0x00000000, | |
95 | }; | |
96 | ||
97 | /* | |
98 | * Definition of one MPC group | |
99 | */ | |
100 | ||
101 | /* | |
102 | * Compatibility macros for busy handling | |
103 | * of network devices. | |
104 | */ | |
105 | ||
106 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb); | |
107 | ||
108 | /* | |
109 | * MPC Group state machine actions (static prototypes) | |
110 | */ | |
111 | static void mpc_action_nop(fsm_instance *fsm, int event, void *arg); | |
112 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg); | |
113 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg); | |
114 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg); | |
115 | static int mpc_validate_xid(struct mpcg_info *mpcginfo); | |
116 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg); | |
117 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg); | |
118 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg); | |
119 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg); | |
120 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg); | |
121 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg); | |
122 | ||
123 | #ifdef DEBUGDATA | |
124 | /*-------------------------------------------------------------------* | |
125 | * Dump buffer format * | |
126 | * * | |
127 | *--------------------------------------------------------------------*/ | |
128 | void ctcmpc_dumpit(char *buf, int len) | |
129 | { | |
130 | __u32 ct, sw, rm, dup; | |
131 | char *ptr, *rptr; | |
132 | char tbuf[82], tdup[82]; | |
ce1f8938 | 133 | #ifdef CONFIG_64BIT |
293d984f PT |
134 | char addr[22]; |
135 | #else | |
136 | char addr[12]; | |
137 | #endif | |
138 | char boff[12]; | |
139 | char bhex[82], duphex[82]; | |
140 | char basc[40]; | |
141 | ||
142 | sw = 0; | |
143 | rptr = ptr = buf; | |
144 | rm = 16; | |
145 | duphex[0] = 0x00; | |
146 | dup = 0; | |
147 | ||
148 | for (ct = 0; ct < len; ct++, ptr++, rptr++) { | |
149 | if (sw == 0) { | |
ce1f8938 UB |
150 | #ifdef CONFIG_64BIT |
151 | sprintf(addr, "%16.16llx", (__u64)rptr); | |
293d984f PT |
152 | #else |
153 | sprintf(addr, "%8.8X", (__u32)rptr); | |
154 | #endif | |
155 | ||
156 | sprintf(boff, "%4.4X", (__u32)ct); | |
157 | bhex[0] = '\0'; | |
158 | basc[0] = '\0'; | |
159 | } | |
160 | if ((sw == 4) || (sw == 12)) | |
161 | strcat(bhex, " "); | |
162 | if (sw == 8) | |
163 | strcat(bhex, " "); | |
164 | ||
ce1f8938 UB |
165 | #if CONFIG_64BIT |
166 | sprintf(tbuf, "%2.2llX", (__u64)*ptr); | |
293d984f PT |
167 | #else |
168 | sprintf(tbuf, "%2.2X", (__u32)*ptr); | |
169 | #endif | |
170 | ||
171 | tbuf[2] = '\0'; | |
172 | strcat(bhex, tbuf); | |
173 | if ((0 != isprint(*ptr)) && (*ptr >= 0x20)) | |
174 | basc[sw] = *ptr; | |
175 | else | |
176 | basc[sw] = '.'; | |
177 | ||
178 | basc[sw+1] = '\0'; | |
179 | sw++; | |
180 | rm--; | |
aa3f2cb6 PT |
181 | if (sw != 16) |
182 | continue; | |
183 | if ((strcmp(duphex, bhex)) != 0) { | |
184 | if (dup != 0) { | |
185 | sprintf(tdup, | |
186 | "Duplicate as above to %s", addr); | |
187 | ctcm_pr_debug(" --- %s ---\n", | |
188 | tdup); | |
189 | } | |
190 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", | |
293d984f | 191 | addr, boff, bhex, basc); |
aa3f2cb6 PT |
192 | dup = 0; |
193 | strcpy(duphex, bhex); | |
194 | } else | |
195 | dup++; | |
293d984f | 196 | |
aa3f2cb6 PT |
197 | sw = 0; |
198 | rm = 16; | |
293d984f PT |
199 | } /* endfor */ |
200 | ||
201 | if (sw != 0) { | |
202 | for ( ; rm > 0; rm--, sw++) { | |
203 | if ((sw == 4) || (sw == 12)) | |
204 | strcat(bhex, " "); | |
205 | if (sw == 8) | |
206 | strcat(bhex, " "); | |
207 | strcat(bhex, " "); | |
208 | strcat(basc, " "); | |
209 | } | |
210 | if (dup != 0) { | |
211 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 212 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f | 213 | } |
aa3f2cb6 PT |
214 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
215 | addr, boff, bhex, basc); | |
293d984f PT |
216 | } else { |
217 | if (dup >= 1) { | |
218 | sprintf(tdup, "Duplicate as above to %s", addr); | |
aa3f2cb6 | 219 | ctcm_pr_debug(" --- %s ---\n", tdup); |
293d984f PT |
220 | } |
221 | if (dup != 0) { | |
aa3f2cb6 | 222 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
293d984f PT |
223 | addr, boff, bhex, basc); |
224 | } | |
225 | } | |
226 | ||
227 | return; | |
228 | ||
229 | } /* end of ctcmpc_dumpit */ | |
230 | #endif | |
231 | ||
232 | #ifdef DEBUGDATA | |
233 | /* | |
234 | * Dump header and first 16 bytes of an sk_buff for debugging purposes. | |
235 | * | |
236 | * skb The sk_buff to dump. | |
237 | * offset Offset relative to skb-data, where to start the dump. | |
238 | */ | |
239 | void ctcmpc_dump_skb(struct sk_buff *skb, int offset) | |
240 | { | |
aa3f2cb6 | 241 | __u8 *p = skb->data; |
293d984f PT |
242 | struct th_header *header; |
243 | struct pdu *pheader; | |
244 | int bl = skb->len; | |
245 | int i; | |
246 | ||
247 | if (p == NULL) | |
248 | return; | |
249 | ||
250 | p += offset; | |
251 | header = (struct th_header *)p; | |
252 | ||
aa3f2cb6 PT |
253 | ctcm_pr_debug("dump:\n"); |
254 | ctcm_pr_debug("skb len=%d \n", skb->len); | |
293d984f PT |
255 | if (skb->len > 2) { |
256 | switch (header->th_ch_flag) { | |
257 | case TH_HAS_PDU: | |
258 | break; | |
259 | case 0x00: | |
260 | case TH_IS_XID: | |
261 | if ((header->th_blk_flag == TH_DATA_IS_XID) && | |
262 | (header->th_is_xid == 0x01)) | |
263 | goto dumpth; | |
264 | case TH_SWEEP_REQ: | |
265 | goto dumpth; | |
266 | case TH_SWEEP_RESP: | |
267 | goto dumpth; | |
268 | default: | |
269 | break; | |
270 | } | |
271 | ||
272 | pheader = (struct pdu *)p; | |
aa3f2cb6 PT |
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); | |
293d984f PT |
278 | goto dumpdata; |
279 | ||
280 | dumpth: | |
aa3f2cb6 PT |
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); | |
293d984f PT |
287 | |
288 | } | |
289 | dumpdata: | |
290 | if (bl > 32) | |
291 | bl = 32; | |
aa3f2cb6 | 292 | ctcm_pr_debug("data: "); |
293d984f | 293 | for (i = 0; i < bl; i++) |
aa3f2cb6 PT |
294 | ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n"); |
295 | ctcm_pr_debug("\n"); | |
293d984f PT |
296 | } |
297 | #endif | |
298 | ||
aa3f2cb6 PT |
299 | static struct net_device *ctcmpc_get_dev(int port_num) |
300 | { | |
301 | char device[20]; | |
302 | struct net_device *dev; | |
303 | struct ctcm_priv *priv; | |
304 | ||
305 | sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); | |
306 | ||
307 | dev = __dev_get_by_name(&init_net, device); | |
308 | ||
309 | if (dev == NULL) { | |
310 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
311 | "%s: Device not found by name: %s", | |
312 | CTCM_FUNTAIL, device); | |
313 | return NULL; | |
314 | } | |
261893d3 | 315 | priv = dev->ml_priv; |
aa3f2cb6 PT |
316 | if (priv == NULL) { |
317 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
261893d3 | 318 | "%s(%s): dev->ml_priv is NULL", |
aa3f2cb6 PT |
319 | CTCM_FUNTAIL, device); |
320 | return NULL; | |
321 | } | |
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); | |
326 | return NULL; | |
327 | } | |
328 | return dev; | |
329 | } | |
330 | ||
293d984f PT |
331 | /* |
332 | * ctc_mpc_alloc_channel | |
333 | * (exported interface) | |
334 | * | |
335 | * Device Initialization : | |
336 | * ACTPATH driven IO operations | |
337 | */ | |
338 | int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int)) | |
339 | { | |
293d984f PT |
340 | struct net_device *dev; |
341 | struct mpc_group *grp; | |
342 | struct ctcm_priv *priv; | |
343 | ||
aa3f2cb6 PT |
344 | dev = ctcmpc_get_dev(port_num); |
345 | if (dev == NULL) | |
293d984f | 346 | return 1; |
261893d3 | 347 | priv = dev->ml_priv; |
293d984f | 348 | grp = priv->mpcg; |
293d984f PT |
349 | |
350 | grp->allochanfunc = callback; | |
351 | grp->port_num = port_num; | |
352 | grp->port_persist = 1; | |
353 | ||
aa3f2cb6 PT |
354 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
355 | "%s(%s): state=%s", | |
356 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
357 | |
358 | switch (fsm_getstate(grp->fsm)) { | |
359 | case MPCG_STATE_INOP: | |
360 | /* Group is in the process of terminating */ | |
361 | grp->alloc_called = 1; | |
362 | break; | |
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*/ | |
367 | /* activated */ | |
368 | /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/ | |
369 | if (callback) | |
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; | |
377 | if (callback) | |
378 | ctcm_open(dev); | |
379 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
380 | break; | |
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, | |
2a7c6f2c | 389 | grp->group_max_buflen); |
293d984f PT |
390 | } else { |
391 | /* there are problems...bail out */ | |
392 | /* there may be a state mismatch so restart */ | |
293d984f PT |
393 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
394 | grp->allocchan_callback_retries = 0; | |
395 | } | |
396 | break; | |
293d984f PT |
397 | } |
398 | ||
293d984f PT |
399 | return 0; |
400 | } | |
401 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); | |
402 | ||
403 | /* | |
404 | * ctc_mpc_establish_connectivity | |
405 | * (exported interface) | |
406 | */ | |
407 | void ctc_mpc_establish_connectivity(int port_num, | |
408 | void (*callback)(int, int, int)) | |
409 | { | |
293d984f PT |
410 | struct net_device *dev; |
411 | struct mpc_group *grp; | |
412 | struct ctcm_priv *priv; | |
413 | struct channel *rch, *wch; | |
414 | ||
aa3f2cb6 PT |
415 | dev = ctcmpc_get_dev(port_num); |
416 | if (dev == NULL) | |
293d984f | 417 | return; |
261893d3 | 418 | priv = dev->ml_priv; |
aa3f2cb6 | 419 | grp = priv->mpcg; |
3c09e264 UB |
420 | rch = priv->channel[CTCM_READ]; |
421 | wch = priv->channel[CTCM_WRITE]; | |
293d984f | 422 | |
aa3f2cb6 PT |
423 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
424 | "%s(%s): state=%s", | |
425 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); | |
293d984f PT |
426 | |
427 | grp->estconnfunc = callback; | |
428 | grp->port_num = port_num; | |
429 | ||
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; | |
442 | } | |
443 | } else { | |
444 | /* there are problems...bail out */ | |
445 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
446 | grp->estconn_callback_retries = 0; | |
447 | } | |
448 | break; | |
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*/ | |
aa3f2cb6 PT |
453 | |
454 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
455 | "%s(%s): REJECTED - inactive channels", | |
456 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
457 | if (grp->estconnfunc) { |
458 | grp->estconnfunc(grp->port_num, -1, 0); | |
459 | grp->estconnfunc = NULL; | |
460 | } | |
461 | break; | |
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 */ | |
aa3f2cb6 | 466 | |
293d984f PT |
467 | if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) || |
468 | (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) { | |
aa3f2cb6 PT |
469 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
470 | "%s(%s): ABORT - PASSIVE XID", | |
471 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
472 | break; |
473 | } | |
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); | |
485 | else { | |
aa3f2cb6 PT |
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); | |
293d984f PT |
489 | if (grp->estconnfunc) { |
490 | grp->estconnfunc(grp->port_num, -1, 0); | |
491 | grp->estconnfunc = NULL; | |
492 | } | |
493 | fsm_deltimer(&grp->timer); | |
494 | goto done; | |
495 | } | |
496 | if ((wch->in_mpcgroup) && | |
497 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) | |
498 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch); | |
499 | else { | |
aa3f2cb6 PT |
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); | |
293d984f PT |
503 | if (grp->estconnfunc) { |
504 | grp->estconnfunc(grp->port_num, -1, 0); | |
505 | grp->estconnfunc = NULL; | |
506 | } | |
507 | fsm_deltimer(&grp->timer); | |
508 | goto done; | |
509 | } | |
510 | break; | |
511 | case MPCG_STATE_XID0IOWAIT: | |
512 | /* already in active XID negotiations */ | |
513 | default: | |
514 | break; | |
515 | } | |
516 | ||
517 | done: | |
aa3f2cb6 | 518 | CTCM_PR_DEBUG("Exit %s()\n", __func__); |
293d984f PT |
519 | return; |
520 | } | |
521 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); | |
522 | ||
523 | /* | |
524 | * ctc_mpc_dealloc_ch | |
525 | * (exported interface) | |
526 | */ | |
527 | void ctc_mpc_dealloc_ch(int port_num) | |
528 | { | |
529 | struct net_device *dev; | |
293d984f PT |
530 | struct ctcm_priv *priv; |
531 | struct mpc_group *grp; | |
532 | ||
aa3f2cb6 PT |
533 | dev = ctcmpc_get_dev(port_num); |
534 | if (dev == NULL) | |
535 | return; | |
261893d3 | 536 | priv = dev->ml_priv; |
aa3f2cb6 | 537 | grp = priv->mpcg; |
293d984f | 538 | |
aa3f2cb6 PT |
539 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG, |
540 | "%s: %s: refcount = %d\n", | |
9fbb711e | 541 | CTCM_FUNTAIL, dev->name, netdev_refcnt_read(dev)); |
293d984f | 542 | |
293d984f | 543 | fsm_deltimer(&priv->restart_timer); |
293d984f | 544 | grp->channels_terminating = 0; |
293d984f | 545 | fsm_deltimer(&grp->timer); |
293d984f PT |
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); | |
551 | ||
552 | ctcm_close(dev); | |
293d984f PT |
553 | return; |
554 | } | |
555 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); | |
556 | ||
557 | /* | |
558 | * ctc_mpc_flow_control | |
559 | * (exported interface) | |
560 | */ | |
561 | void ctc_mpc_flow_control(int port_num, int flowc) | |
562 | { | |
293d984f PT |
563 | struct ctcm_priv *priv; |
564 | struct mpc_group *grp; | |
565 | struct net_device *dev; | |
566 | struct channel *rch; | |
567 | int mpcg_state; | |
568 | ||
aa3f2cb6 PT |
569 | dev = ctcmpc_get_dev(port_num); |
570 | if (dev == NULL) | |
293d984f | 571 | return; |
261893d3 | 572 | priv = dev->ml_priv; |
aa3f2cb6 | 573 | grp = priv->mpcg; |
293d984f | 574 | |
aa3f2cb6 PT |
575 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
576 | "%s: %s: flowc = %d", | |
577 | CTCM_FUNTAIL, dev->name, flowc); | |
293d984f | 578 | |
3c09e264 | 579 | rch = priv->channel[CTCM_READ]; |
293d984f PT |
580 | |
581 | mpcg_state = fsm_getstate(grp->fsm); | |
582 | switch (flowc) { | |
583 | case 1: | |
584 | if (mpcg_state == MPCG_STATE_FLOWC) | |
585 | break; | |
586 | if (mpcg_state == MPCG_STATE_READY) { | |
587 | if (grp->flow_off_called == 1) | |
588 | grp->flow_off_called = 0; | |
589 | else | |
590 | fsm_newstate(grp->fsm, MPCG_STATE_FLOWC); | |
591 | break; | |
592 | } | |
593 | break; | |
594 | case 0: | |
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); | |
600 | } | |
601 | /* possible race condition */ | |
602 | if (mpcg_state == MPCG_STATE_READY) { | |
603 | grp->flow_off_called = 1; | |
604 | break; | |
605 | } | |
606 | break; | |
607 | } | |
608 | ||
293d984f PT |
609 | } |
610 | EXPORT_SYMBOL(ctc_mpc_flow_control); | |
611 | ||
612 | static int mpc_send_qllc_discontact(struct net_device *); | |
613 | ||
614 | /* | |
615 | * helper function of ctcmpc_unpack_skb | |
616 | */ | |
617 | static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) | |
618 | { | |
619 | struct channel *rch = mpcginfo->ch; | |
620 | struct net_device *dev = rch->netdev; | |
261893d3 | 621 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 622 | struct mpc_group *grp = priv->mpcg; |
3c09e264 | 623 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f | 624 | |
aa3f2cb6 PT |
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); | |
293d984f PT |
627 | |
628 | grp->sweep_rsp_pend_num--; | |
629 | ||
630 | if ((grp->sweep_req_pend_num == 0) && | |
631 | (grp->sweep_rsp_pend_num == 0)) { | |
632 | fsm_deltimer(&ch->sweep_timer); | |
633 | grp->in_sweep = 0; | |
634 | rch->th_seq_num = 0x00; | |
635 | ch->th_seq_num = 0x00; | |
636 | ctcm_clear_busy_do(dev); | |
637 | } | |
638 | ||
639 | kfree(mpcginfo); | |
640 | ||
641 | return; | |
642 | ||
643 | } | |
644 | ||
645 | /* | |
646 | * helper function of mpc_rcvd_sweep_req | |
647 | * which is a helper of ctcmpc_unpack_skb | |
648 | */ | |
649 | static void ctcmpc_send_sweep_resp(struct channel *rch) | |
650 | { | |
651 | struct net_device *dev = rch->netdev; | |
261893d3 | 652 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 653 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
654 | struct th_sweep *header; |
655 | struct sk_buff *sweep_skb; | |
3c09e264 | 656 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f | 657 | |
aa3f2cb6 | 658 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id); |
293d984f | 659 | |
aa3f2cb6 | 660 | sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
293d984f | 661 | if (sweep_skb == NULL) { |
aa3f2cb6 PT |
662 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
663 | "%s(%s): sweep_skb allocation ERROR\n", | |
664 | CTCM_FUNTAIL, rch->id); | |
ff2aed7d | 665 | goto done; |
293d984f PT |
666 | } |
667 | ||
ae57b20a | 668 | header = kmalloc(sizeof(struct th_sweep), gfp_type()); |
293d984f PT |
669 | |
670 | if (!header) { | |
671 | dev_kfree_skb_any(sweep_skb); | |
ff2aed7d | 672 | goto done; |
293d984f PT |
673 | } |
674 | ||
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; | |
681 | ||
682 | memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH); | |
683 | ||
684 | kfree(header); | |
685 | ||
686 | dev->trans_start = jiffies; | |
687 | skb_queue_tail(&ch->sweep_queue, sweep_skb); | |
688 | ||
689 | fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch); | |
690 | ||
691 | return; | |
692 | ||
693 | done: | |
e2fc8cb4 JF |
694 | grp->in_sweep = 0; |
695 | ctcm_clear_busy_do(dev); | |
696 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
293d984f PT |
697 | |
698 | return; | |
699 | } | |
700 | ||
701 | /* | |
702 | * helper function of ctcmpc_unpack_skb | |
703 | */ | |
704 | static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo) | |
705 | { | |
706 | struct channel *rch = mpcginfo->ch; | |
707 | struct net_device *dev = rch->netdev; | |
261893d3 | 708 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 709 | struct mpc_group *grp = priv->mpcg; |
3c09e264 | 710 | struct channel *ch = priv->channel[CTCM_WRITE]; |
293d984f PT |
711 | |
712 | if (do_debug) | |
713 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, | |
aa3f2cb6 | 714 | " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
715 | |
716 | if (grp->in_sweep == 0) { | |
717 | grp->in_sweep = 1; | |
718 | ctcm_test_and_set_busy(dev); | |
3c09e264 UB |
719 | grp->sweep_req_pend_num = grp->active_channels[CTCM_READ]; |
720 | grp->sweep_rsp_pend_num = grp->active_channels[CTCM_READ]; | |
293d984f PT |
721 | } |
722 | ||
aa3f2cb6 | 723 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
293d984f PT |
724 | |
725 | grp->sweep_req_pend_num--; | |
726 | ctcmpc_send_sweep_resp(ch); | |
727 | kfree(mpcginfo); | |
728 | return; | |
729 | } | |
730 | ||
731 | /* | |
732 | * MPC Group Station FSM definitions | |
733 | */ | |
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", | |
743 | }; | |
744 | ||
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", | |
759 | }; | |
760 | ||
761 | /* | |
762 | * The MPC Group Station FSM | |
763 | * 22 events | |
764 | */ | |
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 }, | |
769 | ||
770 | { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact }, | |
771 | { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
772 | ||
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 }, | |
778 | ||
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 }, | |
784 | ||
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 }, | |
792 | ||
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 }, | |
799 | ||
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 }, | |
806 | ||
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 }, | |
813 | ||
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 }, | |
821 | ||
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 }, | |
828 | ||
829 | { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop }, | |
830 | { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready }, | |
831 | }; | |
832 | ||
833 | static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm); | |
834 | ||
835 | /* | |
836 | * MPC Group Station FSM action | |
837 | * CTCM_PROTO_MPC only | |
838 | */ | |
839 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg) | |
840 | { | |
841 | struct net_device *dev = arg; | |
261893d3 | 842 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 843 | struct mpc_group *grp = priv->mpcg; |
293d984f | 844 | |
293d984f | 845 | if (grp == NULL) { |
aa3f2cb6 PT |
846 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
847 | "%s(%s): No MPC group", | |
848 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
849 | return; |
850 | } | |
851 | ||
852 | fsm_deltimer(&grp->timer); | |
853 | ||
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; | |
aa3f2cb6 PT |
862 | |
863 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
864 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
865 | "%s(%s): fails", | |
866 | CTCM_FUNTAIL, dev->name); | |
867 | return; | |
293d984f PT |
868 | } |
869 | ||
870 | grp->port_persist = 1; | |
871 | grp->out_of_sequence = 0; | |
872 | grp->estconn_called = 0; | |
873 | ||
874 | tasklet_hi_schedule(&grp->mpc_tasklet2); | |
875 | ||
293d984f | 876 | return; |
293d984f PT |
877 | } |
878 | ||
879 | /* | |
880 | * helper of ctcm_init_netdevice | |
881 | * CTCM_PROTO_MPC only | |
882 | */ | |
883 | void mpc_group_ready(unsigned long adev) | |
884 | { | |
885 | struct net_device *dev = (struct net_device *)adev; | |
261893d3 | 886 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 887 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
888 | struct channel *ch = NULL; |
889 | ||
293d984f | 890 | if (grp == NULL) { |
aa3f2cb6 PT |
891 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
892 | "%s(%s): No MPC group", | |
893 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
894 | return; |
895 | } | |
896 | ||
aa3f2cb6 PT |
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); | |
293d984f PT |
900 | |
901 | fsm_newstate(grp->fsm, MPCG_STATE_READY); | |
902 | ||
903 | /* Put up a read on the channel */ | |
3c09e264 | 904 | ch = priv->channel[CTCM_READ]; |
293d984f | 905 | ch->pdu_seq = 0; |
aa3f2cb6 PT |
906 | CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" , |
907 | __func__, ch->pdu_seq); | |
293d984f PT |
908 | |
909 | ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch); | |
910 | /* Put the write channel in idle state */ | |
3c09e264 | 911 | ch = priv->channel[CTCM_WRITE]; |
293d984f PT |
912 | if (ch->collect_len > 0) { |
913 | spin_lock(&ch->collect_lock); | |
914 | ctcm_purge_skb_queue(&ch->collect_queue); | |
915 | ch->collect_len = 0; | |
916 | spin_unlock(&ch->collect_lock); | |
917 | } | |
918 | ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch); | |
293d984f PT |
919 | ctcm_clear_busy(dev); |
920 | ||
921 | if (grp->estconnfunc) { | |
922 | grp->estconnfunc(grp->port_num, 0, | |
923 | grp->group_max_buflen); | |
924 | grp->estconnfunc = NULL; | |
aa3f2cb6 PT |
925 | } else if (grp->allochanfunc) |
926 | grp->allochanfunc(grp->port_num, grp->group_max_buflen); | |
293d984f PT |
927 | |
928 | grp->send_qllc_disc = 1; | |
929 | grp->changed_side = 0; | |
930 | ||
293d984f PT |
931 | return; |
932 | ||
933 | } | |
934 | ||
935 | /* | |
936 | * Increment the MPC Group Active Channel Counts | |
937 | * helper of dev_action (called from channel fsm) | |
938 | */ | |
aa3f2cb6 | 939 | void mpc_channel_action(struct channel *ch, int direction, int action) |
293d984f | 940 | { |
aa3f2cb6 | 941 | struct net_device *dev = ch->netdev; |
261893d3 | 942 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 943 | struct mpc_group *grp = priv->mpcg; |
293d984f PT |
944 | |
945 | if (grp == NULL) { | |
aa3f2cb6 PT |
946 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
947 | "%s(%s): No MPC group", | |
948 | CTCM_FUNTAIL, dev->name); | |
949 | return; | |
293d984f PT |
950 | } |
951 | ||
aa3f2cb6 PT |
952 | CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
953 | ||
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, | |
3c09e264 UB |
958 | grp->active_channels[CTCM_READ], |
959 | grp->active_channels[CTCM_WRITE]); | |
293d984f PT |
960 | |
961 | if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) { | |
962 | grp->num_channel_paths++; | |
963 | grp->active_channels[direction]++; | |
964 | grp->outstanding_xid2++; | |
965 | ch->in_mpcgroup = 1; | |
966 | ||
967 | if (ch->xid_skb != NULL) | |
968 | dev_kfree_skb_any(ch->xid_skb); | |
969 | ||
970 | ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, | |
971 | GFP_ATOMIC | GFP_DMA); | |
972 | if (ch->xid_skb == NULL) { | |
aa3f2cb6 PT |
973 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
974 | "%s(%s): Couldn't alloc ch xid_skb\n", | |
975 | CTCM_FUNTAIL, dev->name); | |
293d984f | 976 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
aa3f2cb6 | 977 | return; |
293d984f PT |
978 | } |
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; | |
988 | ||
989 | memcpy(skb_put(ch->xid_skb, grp->xid_skb->len), | |
990 | grp->xid_skb->data, | |
991 | grp->xid_skb->len); | |
992 | ||
3c09e264 UB |
993 | ch->xid->xid2_dlc_type = |
994 | ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) | |
293d984f PT |
995 | ? XID2_READ_SIDE : XID2_WRITE_SIDE); |
996 | ||
3c09e264 | 997 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) |
293d984f PT |
998 | ch->xid->xid2_buf_len = 0x00; |
999 | ||
1000 | ch->xid_skb->data = ch->xid_skb_data; | |
1001 | skb_reset_tail_pointer(ch->xid_skb); | |
1002 | ch->xid_skb->len = 0; | |
1003 | ||
1004 | fsm_newstate(ch->fsm, CH_XID0_PENDING); | |
1005 | ||
3c09e264 UB |
1006 | if ((grp->active_channels[CTCM_READ] > 0) && |
1007 | (grp->active_channels[CTCM_WRITE] > 0) && | |
293d984f PT |
1008 | (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) { |
1009 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
aa3f2cb6 PT |
1010 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
1011 | "%s: %s: MPC GROUP CHANNELS ACTIVE\n", | |
1012 | __func__, dev->name); | |
293d984f PT |
1013 | } |
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]--; | |
1019 | ||
1020 | if (ch->xid_skb != NULL) | |
1021 | dev_kfree_skb_any(ch->xid_skb); | |
1022 | ch->xid_skb = NULL; | |
1023 | ||
1024 | if (grp->channels_terminating) | |
1025 | goto done; | |
1026 | ||
3c09e264 UB |
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))) | |
293d984f PT |
1031 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
1032 | } | |
293d984f | 1033 | done: |
aa3f2cb6 PT |
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, | |
3c09e264 UB |
1038 | grp->active_channels[CTCM_READ], |
1039 | grp->active_channels[CTCM_WRITE]); | |
293d984f | 1040 | |
aa3f2cb6 | 1041 | CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
293d984f PT |
1042 | } |
1043 | ||
1044 | /** | |
1045 | * Unpack a just received skb and hand it over to | |
1046 | * upper layers. | |
1047 | * special MPC version of unpack_skb. | |
1048 | * | |
1049 | * ch The channel where this skb has been received. | |
1050 | * pskb The received skb. | |
1051 | */ | |
1052 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) | |
1053 | { | |
1054 | struct net_device *dev = ch->netdev; | |
261893d3 | 1055 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
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; | |
1062 | __u32 new_len; | |
1063 | struct sk_buff *skb; | |
1064 | int skblen; | |
1065 | int sendrc = 0; | |
1066 | ||
aa3f2cb6 PT |
1067 | CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n", |
1068 | __func__, dev->name, smp_processor_id(), ch->id); | |
293d984f PT |
1069 | |
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; | |
1076 | ||
aa3f2cb6 PT |
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); | |
293d984f PT |
1080 | |
1081 | pskb->dev = dev; | |
1082 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
1083 | skb_pull(pskb, TH_HEADER_LENGTH); | |
1084 | ||
1085 | if (likely(header->th_ch_flag == TH_HAS_PDU)) { | |
aa3f2cb6 | 1086 | CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__); |
293d984f PT |
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 * | |
1095 | * is done * | |
1096 | */ | |
1097 | grp->out_of_sequence += 1; | |
1098 | __skb_push(pskb, TH_HEADER_LENGTH); | |
1099 | skb_queue_tail(&ch->io_queue, pskb); | |
aa3f2cb6 PT |
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); | |
293d984f PT |
1103 | |
1104 | return; | |
1105 | } | |
1106 | grp->out_of_sequence = 0; | |
1107 | ch->th_seq_num = header->th_seq_num; | |
1108 | ||
aa3f2cb6 PT |
1109 | CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n", |
1110 | __func__, ch->th_seq_num); | |
293d984f PT |
1111 | |
1112 | if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY)) | |
1113 | goto done; | |
293d984f PT |
1114 | while ((pskb->len > 0) && !pdu_last_seen) { |
1115 | curr_pdu = (struct pdu *)pskb->data; | |
aa3f2cb6 PT |
1116 | |
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); | |
1121 | ||
293d984f PT |
1122 | skb_pull(pskb, PDU_HEADER_LENGTH); |
1123 | ||
1124 | if (curr_pdu->pdu_flag & PDU_LAST) | |
1125 | pdu_last_seen = 1; | |
1126 | if (curr_pdu->pdu_flag & PDU_CNTL) | |
1127 | pskb->protocol = htons(ETH_P_SNAP); | |
1128 | else | |
1129 | pskb->protocol = htons(ETH_P_SNA_DIX); | |
1130 | ||
1131 | if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) { | |
aa3f2cb6 PT |
1132 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1133 | "%s(%s): Dropping packet with " | |
1134 | "illegal siize %d", | |
1135 | CTCM_FUNTAIL, dev->name, pskb->len); | |
1136 | ||
293d984f PT |
1137 | priv->stats.rx_dropped++; |
1138 | priv->stats.rx_length_errors++; | |
1139 | goto done; | |
1140 | } | |
1141 | skb_reset_mac_header(pskb); | |
1142 | new_len = curr_pdu->pdu_offset; | |
aa3f2cb6 PT |
1143 | CTCM_PR_DBGDATA("%s: new_len: %04x \n", |
1144 | __func__, new_len); | |
293d984f PT |
1145 | if ((new_len == 0) || (new_len > pskb->len)) { |
1146 | /* should never happen */ | |
1147 | /* pskb len must be hosed...bail out */ | |
aa3f2cb6 PT |
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); | |
1152 | goto done; | |
293d984f PT |
1153 | } |
1154 | skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC); | |
1155 | ||
1156 | if (!skb) { | |
aa3f2cb6 PT |
1157 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1158 | "%s(%s): MEMORY allocation error", | |
1159 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1160 | priv->stats.rx_dropped++; |
aa3f2cb6 | 1161 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
293d984f PT |
1162 | goto done; |
1163 | } | |
aa3f2cb6 | 1164 | memcpy(skb_put(skb, new_len), pskb->data, new_len); |
293d984f PT |
1165 | |
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; | |
1171 | ch->pdu_seq++; | |
1172 | ||
293d984f | 1173 | if (do_debug_data) { |
aa3f2cb6 PT |
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__); | |
293d984f PT |
1181 | ctcmpc_dump32((char *)skb->data, skb->len); |
1182 | } | |
1183 | ||
1184 | skblen = 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 */ | |
1189 | } | |
1190 | } else { | |
ae57b20a | 1191 | mpcginfo = kmalloc(sizeof(struct mpcg_info), gfp_type()); |
293d984f PT |
1192 | if (mpcginfo == NULL) |
1193 | goto done; | |
1194 | ||
1195 | mpcginfo->ch = ch; | |
1196 | mpcginfo->th = header; | |
1197 | mpcginfo->skb = pskb; | |
aa3f2cb6 PT |
1198 | CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n", |
1199 | __func__); | |
293d984f PT |
1200 | /* it's a sweep? */ |
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) { | |
aa3f2cb6 PT |
1215 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1216 | "%s(%s): control pkt expected\n", | |
1217 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1218 | priv->stats.rx_dropped++; |
1219 | /* mpcginfo only used for non-data transfers */ | |
1220 | kfree(mpcginfo); | |
1221 | if (do_debug_data) | |
1222 | ctcmpc_dump_skb(pskb, -8); | |
1223 | } | |
1224 | } | |
1225 | done: | |
1226 | ||
1227 | dev_kfree_skb_any(pskb); | |
1228 | if (sendrc == NET_RX_DROP) { | |
2a7c6f2c PT |
1229 | dev_warn(&dev->dev, |
1230 | "The network backlog for %s is exceeded, " | |
1231 | "package dropped\n", __func__); | |
293d984f PT |
1232 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
1233 | } | |
1234 | ||
aa3f2cb6 PT |
1235 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1236 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1237 | } |
1238 | ||
1239 | /** | |
1240 | * tasklet helper for mpc's skb unpacking. | |
1241 | * | |
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 | |
1246 | */ | |
1247 | void ctcmpc_bh(unsigned long thischan) | |
1248 | { | |
aa3f2cb6 | 1249 | struct channel *ch = (struct channel *)thischan; |
293d984f | 1250 | struct sk_buff *skb; |
aa3f2cb6 | 1251 | struct net_device *dev = ch->netdev; |
261893d3 | 1252 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1253 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1254 | |
aa3f2cb6 PT |
1255 | CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n", |
1256 | dev->name, smp_processor_id(), __func__, ch->id); | |
293d984f PT |
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); | |
1267 | break; | |
1268 | } | |
1269 | if (skb == skb_peek(&ch->io_queue)) | |
1270 | break; | |
1271 | } | |
aa3f2cb6 PT |
1272 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
1273 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1274 | return; |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * MPC Group Initializations | |
1279 | */ | |
1280 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv) | |
1281 | { | |
1282 | struct mpc_group *grp; | |
1283 | ||
aa3f2cb6 PT |
1284 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
1285 | "Enter %s(%p)", CTCM_FUNTAIL, priv); | |
293d984f PT |
1286 | |
1287 | grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL); | |
1288 | if (grp == NULL) | |
1289 | return NULL; | |
1290 | ||
aa3f2cb6 PT |
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); | |
293d984f PT |
1294 | if (grp->fsm == NULL) { |
1295 | kfree(grp); | |
1296 | return NULL; | |
1297 | } | |
1298 | ||
1299 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); | |
1300 | fsm_settimer(grp->fsm, &grp->timer); | |
1301 | ||
1302 | grp->xid_skb = | |
1303 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); | |
1304 | if (grp->xid_skb == NULL) { | |
293d984f PT |
1305 | kfree_fsm(grp->fsm); |
1306 | kfree(grp); | |
1307 | return NULL; | |
1308 | } | |
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); | |
1314 | ||
aa3f2cb6 | 1315 | grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb); |
293d984f PT |
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; | |
1319 | ||
1320 | grp->xid_id = skb_tail_pointer(grp->xid_skb); | |
1321 | memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4); | |
1322 | ||
1323 | grp->rcvd_xid_skb = | |
1324 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA); | |
1325 | if (grp->rcvd_xid_skb == NULL) { | |
293d984f PT |
1326 | kfree_fsm(grp->fsm); |
1327 | dev_kfree_skb(grp->xid_skb); | |
1328 | kfree(grp); | |
1329 | return NULL; | |
1330 | } | |
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; | |
1337 | priv->mpcg = grp; | |
1338 | return grp; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * The MPC Group Station FSM | |
1343 | */ | |
1344 | ||
1345 | /* | |
1346 | * MPC Group Station FSM actions | |
1347 | * CTCM_PROTO_MPC only | |
1348 | */ | |
1349 | ||
1350 | /** | |
1351 | * NOP action for statemachines | |
1352 | */ | |
1353 | static void mpc_action_nop(fsm_instance *fi, int event, void *arg) | |
1354 | { | |
1355 | } | |
1356 | ||
1357 | /* | |
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. | |
1362 | */ | |
1363 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg) | |
1364 | { | |
1365 | struct net_device *dev = arg; | |
1366 | struct ctcm_priv *priv; | |
1367 | struct mpc_group *grp; | |
ff2aed7d | 1368 | struct channel *wch; |
293d984f | 1369 | |
aa3f2cb6 | 1370 | CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name); |
293d984f | 1371 | |
261893d3 | 1372 | priv = dev->ml_priv; |
293d984f PT |
1373 | grp = priv->mpcg; |
1374 | grp->flow_off_called = 0; | |
293d984f | 1375 | fsm_deltimer(&grp->timer); |
293d984f | 1376 | if (grp->channels_terminating) |
aa3f2cb6 | 1377 | return; |
293d984f PT |
1378 | |
1379 | grp->channels_terminating = 1; | |
293d984f PT |
1380 | grp->saved_state = fsm_getstate(grp->fsm); |
1381 | fsm_newstate(grp->fsm, MPCG_STATE_INOP); | |
1382 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1383 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1384 | "%s(%s): MPC GROUP INOPERATIVE", | |
1385 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1386 | if ((grp->saved_state != MPCG_STATE_RESET) || |
1387 | /* dealloc_channel has been called */ | |
e2fc8cb4 | 1388 | (grp->port_persist == 0)) |
293d984f PT |
1389 | fsm_deltimer(&priv->restart_timer); |
1390 | ||
3c09e264 | 1391 | wch = priv->channel[CTCM_WRITE]; |
293d984f PT |
1392 | |
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: | |
1405 | break; | |
1406 | case MPCG_STATE_FLOWC: | |
1407 | case MPCG_STATE_READY: | |
1408 | default: | |
1409 | tasklet_hi_schedule(&wch->ch_disc_tasklet); | |
1410 | } | |
1411 | ||
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; | |
1418 | grp->xidnogood = 0; | |
1419 | grp->changed_side = 0; | |
1420 | ||
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, | |
1426 | TH_HEADER_LENGTH); | |
1427 | ||
1428 | if (grp->send_qllc_disc == 1) { | |
1429 | grp->send_qllc_disc = 0; | |
ff2aed7d | 1430 | mpc_send_qllc_discontact(dev); |
293d984f PT |
1431 | } |
1432 | ||
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*/ | |
aa3f2cb6 PT |
1437 | /* become unreachable without manual intervention */ |
1438 | if ((grp->port_persist == 1) || (grp->alloc_called)) { | |
293d984f PT |
1439 | grp->alloc_called = 0; |
1440 | fsm_deltimer(&priv->restart_timer); | |
aa3f2cb6 | 1441 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev); |
293d984f PT |
1442 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
1443 | if (grp->saved_state > MPCG_STATE_XID7INITF) | |
aa3f2cb6 PT |
1444 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1445 | "%s(%s): MPC GROUP RECOVERY SCHEDULED", | |
1446 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1447 | } else { |
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); | |
aa3f2cb6 PT |
1451 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
1452 | "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED", | |
1453 | CTCM_FUNTAIL, dev->name); | |
293d984f | 1454 | } |
293d984f PT |
1455 | } |
1456 | ||
1457 | /** | |
1458 | * Handle mpc group action timeout. | |
1459 | * MPC Group Station FSM action | |
1460 | * CTCM_PROTO_MPC only | |
1461 | * | |
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. | |
1465 | */ | |
1466 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg) | |
1467 | { | |
1468 | struct net_device *dev = arg; | |
1469 | struct ctcm_priv *priv; | |
1470 | struct mpc_group *grp; | |
1471 | struct channel *wch; | |
1472 | struct channel *rch; | |
1473 | ||
261893d3 | 1474 | priv = dev->ml_priv; |
293d984f | 1475 | grp = priv->mpcg; |
3c09e264 UB |
1476 | wch = priv->channel[CTCM_WRITE]; |
1477 | rch = priv->channel[CTCM_READ]; | |
293d984f PT |
1478 | |
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)) | |
1486 | break; | |
1487 | default: | |
1488 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1489 | } | |
1490 | ||
aa3f2cb6 PT |
1491 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1492 | "%s: dev=%s exit", | |
1493 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1494 | return; |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * MPC Group Station FSM action | |
1499 | * CTCM_PROTO_MPC only | |
1500 | */ | |
1501 | void mpc_action_discontact(fsm_instance *fi, int event, void *arg) | |
1502 | { | |
1503 | struct mpcg_info *mpcginfo = arg; | |
1504 | struct channel *ch = mpcginfo->ch; | |
aa3f2cb6 PT |
1505 | struct net_device *dev; |
1506 | struct ctcm_priv *priv; | |
1507 | struct mpc_group *grp; | |
293d984f | 1508 | |
aa3f2cb6 PT |
1509 | if (ch) { |
1510 | dev = ch->netdev; | |
1511 | if (dev) { | |
261893d3 | 1512 | priv = dev->ml_priv; |
aa3f2cb6 PT |
1513 | if (priv) { |
1514 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, | |
1515 | "%s: %s: %s\n", | |
1516 | CTCM_FUNTAIL, dev->name, ch->id); | |
1517 | grp = priv->mpcg; | |
1518 | grp->send_qllc_disc = 1; | |
1519 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1520 | } | |
1521 | } | |
293d984f PT |
1522 | } |
1523 | ||
293d984f PT |
1524 | return; |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * MPC Group Station - not part of FSM | |
1529 | * CTCM_PROTO_MPC only | |
1530 | * called from add_channel in ctcm_main.c | |
1531 | */ | |
1532 | void mpc_action_send_discontact(unsigned long thischan) | |
1533 | { | |
aa3f2cb6 PT |
1534 | int rc; |
1535 | struct channel *ch = (struct channel *)thischan; | |
1536 | unsigned long saveflags = 0; | |
293d984f PT |
1537 | |
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); | |
1542 | ||
1543 | if (rc != 0) { | |
aa3f2cb6 | 1544 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
1545 | } |
1546 | ||
293d984f PT |
1547 | return; |
1548 | } | |
1549 | ||
1550 | ||
1551 | /* | |
1552 | * helper function of mpc FSM | |
1553 | * CTCM_PROTO_MPC only | |
1554 | * mpc_action_rcvd_xid7 | |
1555 | */ | |
1556 | static int mpc_validate_xid(struct mpcg_info *mpcginfo) | |
1557 | { | |
aa3f2cb6 PT |
1558 | struct channel *ch = mpcginfo->ch; |
1559 | struct net_device *dev = ch->netdev; | |
261893d3 | 1560 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1561 | struct mpc_group *grp = priv->mpcg; |
aa3f2cb6 PT |
1562 | struct xid2 *xid = mpcginfo->xid; |
1563 | int rc = 0; | |
1564 | __u64 our_id = 0; | |
1565 | __u64 their_id = 0; | |
1566 | int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH; | |
293d984f | 1567 | |
aa3f2cb6 | 1568 | CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid); |
293d984f | 1569 | |
aa3f2cb6 | 1570 | if (xid == NULL) { |
293d984f | 1571 | rc = 1; |
aa3f2cb6 PT |
1572 | /* XID REJECTED: xid == NULL */ |
1573 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1574 | "%s(%s): xid = NULL", | |
1575 | CTCM_FUNTAIL, ch->id); | |
1576 | goto done; | |
293d984f PT |
1577 | } |
1578 | ||
aa3f2cb6 | 1579 | CTCM_D3_DUMP((char *)xid, XID2_LENGTH); |
293d984f PT |
1580 | |
1581 | /*the received direction should be the opposite of ours */ | |
3c09e264 | 1582 | if (((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? XID2_WRITE_SIDE : |
293d984f | 1583 | XID2_READ_SIDE) != xid->xid2_dlc_type) { |
aa3f2cb6 PT |
1584 | rc = 2; |
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); | |
1589 | goto done; | |
293d984f PT |
1590 | } |
1591 | ||
1592 | if (xid->xid2_dlc_type == XID2_READ_SIDE) { | |
aa3f2cb6 PT |
1593 | CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__, |
1594 | grp->group_max_buflen, xid->xid2_buf_len); | |
293d984f | 1595 | |
aa3f2cb6 PT |
1596 | if (grp->group_max_buflen == 0 || grp->group_max_buflen > |
1597 | xid->xid2_buf_len - len) | |
293d984f PT |
1598 | grp->group_max_buflen = xid->xid2_buf_len - len; |
1599 | } | |
1600 | ||
aa3f2cb6 | 1601 | if (grp->saved_xid2 == NULL) { |
293d984f PT |
1602 | grp->saved_xid2 = |
1603 | (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb); | |
1604 | ||
1605 | memcpy(skb_put(grp->rcvd_xid_skb, | |
1606 | XID2_LENGTH), xid, XID2_LENGTH); | |
1607 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; | |
1608 | ||
1609 | skb_reset_tail_pointer(grp->rcvd_xid_skb); | |
1610 | grp->rcvd_xid_skb->len = 0; | |
1611 | ||
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) { | |
1621 | grp->roll = XSIDE; | |
aa3f2cb6 PT |
1622 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1623 | "%s(%s): WE HAVE LOW ID - TAKE XSIDE", | |
1624 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1625 | } else { |
1626 | grp->roll = YSIDE; | |
aa3f2cb6 PT |
1627 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
1628 | "%s(%s): WE HAVE HIGH ID - TAKE YSIDE", | |
1629 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1630 | } |
1631 | ||
1632 | } else { | |
1633 | if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) { | |
aa3f2cb6 PT |
1634 | rc = 3; |
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); | |
293d984f PT |
1639 | } |
1640 | if (xid->xid2_flag2 == 0x40) { | |
aa3f2cb6 PT |
1641 | rc = 4; |
1642 | /* XID REJECTED - xid NOGOOD */ | |
1643 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, | |
1644 | "%s(%s): xid NOGOOD", | |
1645 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1646 | } |
1647 | if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) { | |
aa3f2cb6 PT |
1648 | rc = 5; |
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); | |
293d984f PT |
1653 | } |
1654 | if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) { | |
aa3f2cb6 PT |
1655 | rc = 6; |
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); | |
293d984f PT |
1660 | } |
1661 | } | |
aa3f2cb6 PT |
1662 | done: |
1663 | if (rc) { | |
2a7c6f2c PT |
1664 | dev_warn(&dev->dev, |
1665 | "The XID used in the MPC protocol is not valid, " | |
1666 | "rc = %d\n", rc); | |
293d984f PT |
1667 | priv->xid->xid2_flag2 = 0x40; |
1668 | grp->saved_xid2->xid2_flag2 = 0x40; | |
293d984f PT |
1669 | } |
1670 | ||
293d984f PT |
1671 | return rc; |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * MPC Group Station FSM action | |
1676 | * CTCM_PROTO_MPC only | |
1677 | */ | |
1678 | static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side) | |
1679 | { | |
1680 | struct channel *ch = arg; | |
293d984f PT |
1681 | int rc = 0; |
1682 | int gotlock = 0; | |
1683 | unsigned long saveflags = 0; /* avoids compiler warning with | |
aa3f2cb6 | 1684 | spin_unlock_irqrestore */ |
293d984f | 1685 | |
aa3f2cb6 PT |
1686 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1687 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1688 | |
1689 | if (ctcm_checkalloc_buffer(ch)) | |
1690 | goto done; | |
1691 | ||
aa3f2cb6 PT |
1692 | /* |
1693 | * skb data-buffer referencing: | |
1694 | */ | |
293d984f PT |
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 | |
1701 | */ | |
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; | |
1714 | ||
1715 | /* non-checking rewrite of above skb data-buffer referencing: */ | |
1716 | /* | |
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; | |
1721 | */ | |
1722 | ||
1723 | ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1724 | ch->ccw[8].count = 0; | |
1725 | ch->ccw[8].cda = 0x00; | |
1726 | ||
aa3f2cb6 PT |
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); | |
1731 | ||
293d984f PT |
1732 | if (side == XSIDE) { |
1733 | /* mpc_action_xside_xid */ | |
aa3f2cb6 PT |
1734 | if (ch->xid_th == NULL) |
1735 | goto done; | |
293d984f PT |
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); | |
1740 | ||
aa3f2cb6 PT |
1741 | if (ch->xid == NULL) |
1742 | goto done; | |
293d984f PT |
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); | |
1747 | ||
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); | |
1752 | ||
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); | |
1757 | ||
1758 | ch->ccw[13].cmd_code = CCW_CMD_READ; | |
1759 | ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id); | |
1760 | ||
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); | |
1766 | ||
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); | |
1771 | ||
aa3f2cb6 PT |
1772 | if (ch->xid_th == NULL) |
1773 | goto done; | |
293d984f PT |
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); | |
1778 | ||
aa3f2cb6 PT |
1779 | if (ch->xid == NULL) |
1780 | goto done; | |
293d984f PT |
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); | |
1785 | ||
aa3f2cb6 PT |
1786 | if (ch->xid_id == NULL) |
1787 | goto done; | |
293d984f PT |
1788 | ch->ccw[13].cmd_code = CCW_CMD_WRITE; |
1789 | ch->ccw[13].cda = virt_to_phys(ch->xid_id); | |
1790 | ||
1791 | } | |
1792 | ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1793 | ch->ccw[13].count = 4; | |
1794 | ||
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; | |
1799 | ||
aa3f2cb6 PT |
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); | |
293d984f | 1804 | |
293d984f PT |
1805 | if (!in_irq()) { |
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); | |
1810 | gotlock = 1; | |
1811 | } | |
1812 | ||
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); | |
1816 | ||
1817 | if (gotlock) /* see remark above about conditional locking */ | |
1818 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
1819 | ||
1820 | if (rc != 0) { | |
293d984f PT |
1821 | ctcm_ccw_check_rc(ch, rc, |
1822 | (side == XSIDE) ? "x-side XID" : "y-side XID"); | |
1823 | } | |
1824 | ||
1825 | done: | |
aa3f2cb6 PT |
1826 | CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n", |
1827 | __func__, ch, ch->id); | |
293d984f PT |
1828 | return; |
1829 | ||
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * MPC Group Station FSM action | |
1834 | * CTCM_PROTO_MPC only | |
1835 | */ | |
1836 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg) | |
1837 | { | |
1838 | mpc_action_side_xid(fsm, arg, XSIDE); | |
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * MPC Group Station FSM action | |
1843 | * CTCM_PROTO_MPC only | |
1844 | */ | |
1845 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg) | |
1846 | { | |
1847 | mpc_action_side_xid(fsm, arg, YSIDE); | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * MPC Group Station FSM action | |
1852 | * CTCM_PROTO_MPC only | |
1853 | */ | |
1854 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg) | |
1855 | { | |
aa3f2cb6 PT |
1856 | struct channel *ch = arg; |
1857 | struct net_device *dev = ch->netdev; | |
261893d3 | 1858 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1859 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1860 | |
aa3f2cb6 PT |
1861 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
1862 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1863 | |
1864 | if (ch->xid == NULL) { | |
aa3f2cb6 PT |
1865 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1866 | "%s(%s): ch->xid == NULL", | |
1867 | CTCM_FUNTAIL, dev->name); | |
1868 | return; | |
293d984f PT |
1869 | } |
1870 | ||
1871 | fsm_newstate(ch->fsm, CH_XID0_INPROGRESS); | |
1872 | ||
1873 | ch->xid->xid2_option = XID2_0; | |
1874 | ||
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; | |
1879 | break; | |
1880 | case MPCG_STATE_XID0IOWAIT: | |
1881 | case MPCG_STATE_XID0IOWAIX: | |
1882 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1883 | break; | |
1884 | } | |
1885 | ||
1886 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1887 | ||
293d984f | 1888 | return; |
293d984f PT |
1889 | } |
1890 | ||
1891 | /* | |
1892 | * MPC Group Station FSM action | |
1893 | * CTCM_PROTO_MPC only | |
1894 | */ | |
1895 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg) | |
1896 | { | |
1897 | struct net_device *dev = arg; | |
261893d3 | 1898 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1899 | struct mpc_group *grp = NULL; |
293d984f | 1900 | int direction; |
293d984f PT |
1901 | int send = 0; |
1902 | ||
aa3f2cb6 PT |
1903 | if (priv) |
1904 | grp = priv->mpcg; | |
e2fc8cb4 | 1905 | if (grp == NULL) |
aa3f2cb6 | 1906 | return; |
293d984f | 1907 | |
3c09e264 | 1908 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
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; | |
1915 | send = 0; | |
1916 | ||
1917 | /* xid7 phase 1 */ | |
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, | |
1924 | TH_HEADER_LENGTH), | |
1925 | &thdummy, TH_HEADER_LENGTH); | |
1926 | send = 1; | |
1927 | } | |
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, | |
1932 | TH_HEADER_LENGTH), | |
1933 | &thnorm, TH_HEADER_LENGTH); | |
1934 | send = 1; | |
1935 | } | |
1936 | } else { | |
1937 | /* xid7 phase 2 */ | |
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, | |
1942 | TH_HEADER_LENGTH), | |
1943 | &thnorm, TH_HEADER_LENGTH); | |
1944 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; | |
1945 | send = 1; | |
1946 | } | |
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); | |
1952 | send = 1; | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | if (send) | |
1957 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); | |
1958 | } | |
1959 | ||
293d984f PT |
1960 | return; |
1961 | } | |
1962 | ||
1963 | /* | |
1964 | * MPC Group Station FSM action | |
1965 | * CTCM_PROTO_MPC only | |
1966 | */ | |
1967 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) | |
1968 | { | |
1969 | ||
aa3f2cb6 PT |
1970 | struct mpcg_info *mpcginfo = arg; |
1971 | struct channel *ch = mpcginfo->ch; | |
1972 | struct net_device *dev = ch->netdev; | |
261893d3 | 1973 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1974 | struct mpc_group *grp = priv->mpcg; |
293d984f | 1975 | |
aa3f2cb6 PT |
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); | |
293d984f PT |
1979 | |
1980 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING) | |
1981 | fsm_newstate(ch->fsm, CH_XID7_PENDING); | |
1982 | ||
1983 | grp->outstanding_xid2--; | |
1984 | grp->outstanding_xid7++; | |
1985 | grp->outstanding_xid7_p2++; | |
1986 | ||
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); | |
1993 | break; | |
1994 | case MPCG_STATE_XID0IOWAIT: | |
1995 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX); | |
1996 | mpc_validate_xid(mpcginfo); | |
1997 | break; | |
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); | |
2003 | } | |
2004 | break; | |
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); | |
2010 | } | |
2011 | break; | |
2012 | } | |
2013 | kfree(mpcginfo); | |
2014 | ||
aa3f2cb6 PT |
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", | |
2019 | __func__, ch->id, | |
2020 | fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm)); | |
293d984f PT |
2021 | return; |
2022 | ||
2023 | } | |
2024 | ||
2025 | ||
2026 | /* | |
2027 | * MPC Group Station FSM action | |
2028 | * CTCM_PROTO_MPC only | |
2029 | */ | |
2030 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) | |
2031 | { | |
2032 | struct mpcg_info *mpcginfo = arg; | |
2033 | struct channel *ch = mpcginfo->ch; | |
2034 | struct net_device *dev = ch->netdev; | |
261893d3 | 2035 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2036 | struct mpc_group *grp = priv->mpcg; |
2037 | ||
aa3f2cb6 PT |
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); | |
293d984f PT |
2042 | |
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; | |
2047 | ||
2048 | switch (fsm_getstate(grp->fsm)) { | |
2049 | case MPCG_STATE_XID7INITI: | |
2050 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ); | |
2051 | mpc_validate_xid(mpcginfo); | |
2052 | break; | |
2053 | case MPCG_STATE_XID7INITW: | |
2054 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX); | |
2055 | mpc_validate_xid(mpcginfo); | |
2056 | break; | |
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; | |
2064 | } else | |
2065 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF); | |
2066 | ||
2067 | mpc_validate_xid(mpcginfo); | |
2068 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
2069 | break; | |
2070 | } | |
2071 | mpc_validate_xid(mpcginfo); | |
2072 | break; | |
2073 | } | |
293d984f | 2074 | kfree(mpcginfo); |
293d984f | 2075 | return; |
293d984f PT |
2076 | } |
2077 | ||
2078 | /* | |
2079 | * mpc_action helper of an MPC Group Station FSM action | |
2080 | * CTCM_PROTO_MPC only | |
2081 | */ | |
2082 | static int mpc_send_qllc_discontact(struct net_device *dev) | |
2083 | { | |
293d984f PT |
2084 | __u32 new_len = 0; |
2085 | struct sk_buff *skb; | |
2086 | struct qllc *qllcptr; | |
261893d3 | 2087 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2088 | struct mpc_group *grp = priv->mpcg; |
293d984f | 2089 | |
aa3f2cb6 PT |
2090 | CTCM_PR_DEBUG("%s: GROUP STATE: %s\n", |
2091 | __func__, mpcg_state_names[grp->saved_state]); | |
293d984f PT |
2092 | |
2093 | switch (grp->saved_state) { | |
2094 | /* | |
2095 | * establish conn callback function is | |
2096 | * preferred method to report failure | |
2097 | */ | |
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; | |
2109 | break; | |
2110 | } | |
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) { | |
aa3f2cb6 PT |
2117 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2118 | "%s(%s): qllcptr allocation error", | |
2119 | CTCM_FUNTAIL, dev->name); | |
2120 | return -ENOMEM; | |
293d984f PT |
2121 | } |
2122 | ||
2123 | qllcptr->qllc_address = 0xcc; | |
2124 | qllcptr->qllc_commands = 0x03; | |
2125 | ||
2126 | skb = __dev_alloc_skb(new_len, GFP_ATOMIC); | |
2127 | ||
2128 | if (skb == NULL) { | |
aa3f2cb6 PT |
2129 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2130 | "%s(%s): skb allocation error", | |
2131 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2132 | priv->stats.rx_dropped++; |
293d984f | 2133 | kfree(qllcptr); |
aa3f2cb6 | 2134 | return -ENOMEM; |
293d984f PT |
2135 | } |
2136 | ||
2137 | memcpy(skb_put(skb, new_len), qllcptr, new_len); | |
2138 | kfree(qllcptr); | |
2139 | ||
2140 | if (skb_headroom(skb) < 4) { | |
aa3f2cb6 PT |
2141 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
2142 | "%s(%s): skb_headroom error", | |
2143 | CTCM_FUNTAIL, dev->name); | |
293d984f | 2144 | dev_kfree_skb_any(skb); |
aa3f2cb6 | 2145 | return -ENOMEM; |
293d984f PT |
2146 | } |
2147 | ||
3c09e264 UB |
2148 | *((__u32 *)skb_push(skb, 4)) = |
2149 | priv->channel[CTCM_READ]->pdu_seq; | |
2150 | priv->channel[CTCM_READ]->pdu_seq++; | |
aa3f2cb6 | 2151 | CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n", |
3c09e264 | 2152 | __func__, priv->channel[CTCM_READ]->pdu_seq); |
293d984f PT |
2153 | |
2154 | /* receipt of CC03 resets anticipated sequence number on | |
2155 | receiving side */ | |
3c09e264 | 2156 | priv->channel[CTCM_READ]->pdu_seq = 0x00; |
293d984f PT |
2157 | skb_reset_mac_header(skb); |
2158 | skb->dev = dev; | |
2159 | skb->protocol = htons(ETH_P_SNAP); | |
2160 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2161 | ||
aa3f2cb6 | 2162 | CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4)); |
293d984f PT |
2163 | |
2164 | netif_rx(skb); | |
2165 | break; | |
2166 | default: | |
2167 | break; | |
2168 | ||
2169 | } | |
2170 | ||
aa3f2cb6 | 2171 | return 0; |
293d984f PT |
2172 | } |
2173 | /* --- This is the END my friend --- */ | |
2174 |