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holepunch: fix mmap_sem i_mutex deadlock
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
blob067f1519eb04dcda87ff07f79d6cae072675770e
1 /*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
5 * (C) Copyright IBM Corp. 2002, 2006
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include "zfcp_ext.h"
23
24 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
25 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
26 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
27 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
28 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
29 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
30 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
31 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
32 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
33 static int zfcp_fsf_send_fcp_command_task_management_handler(
34 struct zfcp_fsf_req *);
35 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
36 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
37 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
38 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
39 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
40 static inline int zfcp_fsf_req_sbal_check(
41 unsigned long *, struct zfcp_qdio_queue *, int);
42 static inline int zfcp_use_one_sbal(
43 struct scatterlist *, int, struct scatterlist *, int);
44 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
45 static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
46 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
47 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
48 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
49 static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *,
50 struct fsf_link_down_info *);
51 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
52
53 /* association between FSF command and FSF QTCB type */
54 static u32 fsf_qtcb_type[] = {
55 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
56 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
58 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
59 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
61 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
62 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
63 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
64 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
65 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
66 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
67 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
68 };
69
70 static const char zfcp_act_subtable_type[5][8] = {
71 "unknown", "OS", "WWPN", "DID", "LUN"
72 };
73
74 /****************************************************************/
75 /*************** FSF related Functions *************************/
76 /****************************************************************/
77
78 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
79
80 /*
81 * function: zfcp_fsf_req_alloc
82 *
83 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
84 * unsolicited requests) via helper functions
85 * Does some initial fsf request set-up.
86 *
87 * returns: pointer to allocated fsf_req if successfull
88 * NULL otherwise
89 *
90 * locks: none
91 *
92 */
93 static struct zfcp_fsf_req *
94 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
95 {
96 size_t size;
97 void *ptr;
98 struct zfcp_fsf_req *fsf_req = NULL;
99
100 if (req_flags & ZFCP_REQ_NO_QTCB)
101 size = sizeof(struct zfcp_fsf_req);
102 else
103 size = sizeof(struct zfcp_fsf_req_qtcb);
104
105 if (likely(pool))
106 ptr = mempool_alloc(pool, GFP_ATOMIC);
107 else {
108 if (req_flags & ZFCP_REQ_NO_QTCB)
109 ptr = kmalloc(size, GFP_ATOMIC);
110 else
111 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
112 GFP_ATOMIC);
113 }
114
115 if (unlikely(!ptr))
116 goto out;
117
118 memset(ptr, 0, size);
119
120 if (req_flags & ZFCP_REQ_NO_QTCB) {
121 fsf_req = (struct zfcp_fsf_req *) ptr;
122 } else {
123 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
124 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
125 }
126
127 fsf_req->pool = pool;
128
129 out:
130 return fsf_req;
131 }
132
133 /*
134 * function: zfcp_fsf_req_free
135 *
136 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
137 * returns it into the pool via helper functions.
138 *
139 * returns: sod all
140 *
141 * locks: none
142 */
143 void
144 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
145 {
146 if (likely(fsf_req->pool)) {
147 mempool_free(fsf_req, fsf_req->pool);
148 return;
149 }
150
151 if (fsf_req->qtcb) {
152 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
153 return;
154 }
155
156 kfree(fsf_req);
157 }
158
159 /**
160 * zfcp_fsf_req_dismiss - dismiss a single fsf request
161 */
162 static void zfcp_fsf_req_dismiss(struct zfcp_adapter *adapter,
163 struct zfcp_fsf_req *fsf_req,
164 unsigned int counter)
165 {
166 u64 dbg_tmp[2];
167
168 dbg_tmp[0] = (u64) atomic_read(&adapter->reqs_active);
169 dbg_tmp[1] = (u64) counter;
170 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
171 list_del(&fsf_req->list);
172 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
173 zfcp_fsf_req_complete(fsf_req);
174 }
175
176 /**
177 * zfcp_fsf_req_dismiss_all - dismiss all remaining fsf requests
178 */
179 int zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
180 {
181 struct zfcp_fsf_req *request, *tmp;
182 unsigned long flags;
183 unsigned int i, counter;
184
185 spin_lock_irqsave(&adapter->req_list_lock, flags);
186 atomic_set(&adapter->reqs_active, 0);
187 for (i=0; i<REQUEST_LIST_SIZE; i++) {
188 if (list_empty(&adapter->req_list[i]))
189 continue;
190
191 counter = 0;
192 list_for_each_entry_safe(request, tmp,
193 &adapter->req_list[i], list) {
194 zfcp_fsf_req_dismiss(adapter, request, counter);
195 counter++;
196 }
197 }
198 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
199
200 return 0;
201 }
202
203 /*
204 * function: zfcp_fsf_req_complete
205 *
206 * purpose: Updates active counts and timers for openfcp-reqs
207 * May cleanup request after req_eval returns
208 *
209 * returns: 0 - success
210 * !0 - failure
211 *
212 * context:
213 */
214 int
215 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
216 {
217 int retval = 0;
218 int cleanup;
219
220 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
221 ZFCP_LOG_DEBUG("Status read response received\n");
222 /*
223 * Note: all cleanup handling is done in the callchain of
224 * the function call-chain below.
225 */
226 zfcp_fsf_status_read_handler(fsf_req);
227 goto out;
228 } else {
229 del_timer(&fsf_req->timer);
230 zfcp_fsf_protstatus_eval(fsf_req);
231 }
232
233 /*
234 * fsf_req may be deleted due to waking up functions, so
235 * cleanup is saved here and used later
236 */
237 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
238 cleanup = 1;
239 else
240 cleanup = 0;
241
242 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
243
244 /* cleanup request if requested by initiator */
245 if (likely(cleanup)) {
246 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
247 /*
248 * lock must not be held here since it will be
249 * grabed by the called routine, too
250 */
251 zfcp_fsf_req_free(fsf_req);
252 } else {
253 /* notify initiator waiting for the requests completion */
254 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
255 /*
256 * FIXME: Race! We must not access fsf_req here as it might have been
257 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
258 * flag. It's an improbable case. But, we have the same paranoia for
259 * the cleanup flag already.
260 * Might better be handled using complete()?
261 * (setting the flag and doing wakeup ought to be atomic
262 * with regard to checking the flag as long as waitqueue is
263 * part of the to be released structure)
264 */
265 wake_up(&fsf_req->completion_wq);
266 }
267
268 out:
269 return retval;
270 }
271
272 /*
273 * function: zfcp_fsf_protstatus_eval
274 *
275 * purpose: evaluates the QTCB of the finished FSF request
276 * and initiates appropriate actions
277 * (usually calling FSF command specific handlers)
278 *
279 * returns:
280 *
281 * context:
282 *
283 * locks:
284 */
285 static int
286 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
287 {
288 int retval = 0;
289 struct zfcp_adapter *adapter = fsf_req->adapter;
290 struct fsf_qtcb *qtcb = fsf_req->qtcb;
291 union fsf_prot_status_qual *prot_status_qual =
292 &qtcb->prefix.prot_status_qual;
293
294 zfcp_hba_dbf_event_fsf_response(fsf_req);
295
296 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
297 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
298 (unsigned long) fsf_req);
299 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
300 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
301 goto skip_protstatus;
302 }
303
304 /* log additional information provided by FSF (if any) */
305 if (unlikely(qtcb->header.log_length)) {
306 /* do not trust them ;-) */
307 if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
308 ZFCP_LOG_NORMAL
309 ("bug: ULP (FSF logging) log data starts "
310 "beyond end of packet header. Ignored. "
311 "(start=%i, size=%li)\n",
312 qtcb->header.log_start,
313 sizeof(struct fsf_qtcb));
314 goto forget_log;
315 }
316 if ((size_t) (qtcb->header.log_start + qtcb->header.log_length)
317 > sizeof(struct fsf_qtcb)) {
318 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
319 "beyond end of packet header. Ignored. "
320 "(start=%i, length=%i, size=%li)\n",
321 qtcb->header.log_start,
322 qtcb->header.log_length,
323 sizeof(struct fsf_qtcb));
324 goto forget_log;
325 }
326 ZFCP_LOG_TRACE("ULP log data: \n");
327 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
328 (char *) qtcb + qtcb->header.log_start,
329 qtcb->header.log_length);
330 }
331 forget_log:
332
333 /* evaluate FSF Protocol Status */
334 switch (qtcb->prefix.prot_status) {
335
336 case FSF_PROT_GOOD:
337 case FSF_PROT_FSF_STATUS_PRESENTED:
338 break;
339
340 case FSF_PROT_QTCB_VERSION_ERROR:
341 ZFCP_LOG_NORMAL("error: The adapter %s contains "
342 "microcode of version 0x%x, the device driver "
343 "only supports 0x%x. Aborting.\n",
344 zfcp_get_busid_by_adapter(adapter),
345 prot_status_qual->version_error.fsf_version,
346 ZFCP_QTCB_VERSION);
347 zfcp_erp_adapter_shutdown(adapter, 0);
348 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
349 break;
350
351 case FSF_PROT_SEQ_NUMB_ERROR:
352 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
353 "driver (0x%x) and adapter %s (0x%x). "
354 "Restarting all operations on this adapter.\n",
355 qtcb->prefix.req_seq_no,
356 zfcp_get_busid_by_adapter(adapter),
357 prot_status_qual->sequence_error.exp_req_seq_no);
358 zfcp_erp_adapter_reopen(adapter, 0);
359 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
360 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
361 break;
362
363 case FSF_PROT_UNSUPP_QTCB_TYPE:
364 ZFCP_LOG_NORMAL("error: Packet header type used by the "
365 "device driver is incompatible with "
366 "that used on adapter %s. "
367 "Stopping all operations on this adapter.\n",
368 zfcp_get_busid_by_adapter(adapter));
369 zfcp_erp_adapter_shutdown(adapter, 0);
370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372
373 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
374 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
376 &(adapter->status));
377 break;
378
379 case FSF_PROT_DUPLICATE_REQUEST_ID:
380 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
381 "to the adapter %s is ambiguous. "
382 "Stopping all operations on this adapter.\n",
383 *(unsigned long long*)
384 (&qtcb->bottom.support.req_handle),
385 zfcp_get_busid_by_adapter(adapter));
386 zfcp_erp_adapter_shutdown(adapter, 0);
387 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
388 break;
389
390 case FSF_PROT_LINK_DOWN:
391 zfcp_fsf_link_down_info_eval(adapter,
392 &prot_status_qual->link_down_info);
393 zfcp_erp_adapter_reopen(adapter, 0);
394 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
395 break;
396
397 case FSF_PROT_REEST_QUEUE:
398 ZFCP_LOG_NORMAL("The local link to adapter with "
399 "%s was re-plugged. "
400 "Re-starting operations on this adapter.\n",
401 zfcp_get_busid_by_adapter(adapter));
402 /* All ports should be marked as ready to run again */
403 zfcp_erp_modify_adapter_status(adapter,
404 ZFCP_STATUS_COMMON_RUNNING,
405 ZFCP_SET);
406 zfcp_erp_adapter_reopen(adapter,
407 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
408 | ZFCP_STATUS_COMMON_ERP_FAILED);
409 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
410 break;
411
412 case FSF_PROT_ERROR_STATE:
413 ZFCP_LOG_NORMAL("error: The adapter %s "
414 "has entered the error state. "
415 "Restarting all operations on this "
416 "adapter.\n",
417 zfcp_get_busid_by_adapter(adapter));
418 zfcp_erp_adapter_reopen(adapter, 0);
419 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
420 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
421 break;
422
423 default:
424 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
425 "provided by the adapter %s "
426 "is not compatible with the device driver. "
427 "Stopping all operations on this adapter. "
428 "(debug info 0x%x).\n",
429 zfcp_get_busid_by_adapter(adapter),
430 qtcb->prefix.prot_status);
431 zfcp_erp_adapter_shutdown(adapter, 0);
432 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
433 }
434
435 skip_protstatus:
436 /*
437 * always call specific handlers to give them a chance to do
438 * something meaningful even in error cases
439 */
440 zfcp_fsf_fsfstatus_eval(fsf_req);
441 return retval;
442 }
443
444 /*
445 * function: zfcp_fsf_fsfstatus_eval
446 *
447 * purpose: evaluates FSF status of completed FSF request
448 * and acts accordingly
449 *
450 * returns:
451 */
452 static int
453 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
454 {
455 int retval = 0;
456
457 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
458 goto skip_fsfstatus;
459 }
460
461 /* evaluate FSF Status */
462 switch (fsf_req->qtcb->header.fsf_status) {
463 case FSF_UNKNOWN_COMMAND:
464 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
465 "not known by the adapter %s "
466 "Stopping all operations on this adapter. "
467 "(debug info 0x%x).\n",
468 zfcp_get_busid_by_adapter(fsf_req->adapter),
469 fsf_req->qtcb->header.fsf_command);
470 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
471 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
472 break;
473
474 case FSF_FCP_RSP_AVAILABLE:
475 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
476 "SCSI stack.\n");
477 break;
478
479 case FSF_ADAPTER_STATUS_AVAILABLE:
480 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
481 break;
482 }
483
484 skip_fsfstatus:
485 /*
486 * always call specific handlers to give them a chance to do
487 * something meaningful even in error cases
488 */
489 zfcp_fsf_req_dispatch(fsf_req);
490
491 return retval;
492 }
493
494 /*
495 * function: zfcp_fsf_fsfstatus_qual_eval
496 *
497 * purpose: evaluates FSF status-qualifier of completed FSF request
498 * and acts accordingly
499 *
500 * returns:
501 */
502 static int
503 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
504 {
505 int retval = 0;
506
507 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
508 case FSF_SQ_FCP_RSP_AVAILABLE:
509 break;
510 case FSF_SQ_RETRY_IF_POSSIBLE:
511 /* The SCSI-stack may now issue retries or escalate */
512 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
513 break;
514 case FSF_SQ_COMMAND_ABORTED:
515 /* Carry the aborted state on to upper layer */
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
518 break;
519 case FSF_SQ_NO_RECOM:
520 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
521 "problem on the adapter %s "
522 "Stopping all operations on this adapter. ",
523 zfcp_get_busid_by_adapter(fsf_req->adapter));
524 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
525 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
526 break;
527 case FSF_SQ_ULP_PROGRAMMING_ERROR:
528 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
529 "(adapter %s)\n",
530 zfcp_get_busid_by_adapter(fsf_req->adapter));
531 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
532 break;
533 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
534 case FSF_SQ_NO_RETRY_POSSIBLE:
535 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
536 /* dealt with in the respective functions */
537 break;
538 default:
539 ZFCP_LOG_NORMAL("bug: Additional status info could "
540 "not be interpreted properly.\n");
541 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
542 (char *) &fsf_req->qtcb->header.fsf_status_qual,
543 sizeof (union fsf_status_qual));
544 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
545 break;
546 }
547
548 return retval;
549 }
550
551 /**
552 * zfcp_fsf_link_down_info_eval - evaluate link down information block
553 */
554 static void
555 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter,
556 struct fsf_link_down_info *link_down)
557 {
558 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
559 &adapter->status))
560 return;
561
562 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
563
564 if (link_down == NULL)
565 goto out;
566
567 switch (link_down->error_code) {
568 case FSF_PSQ_LINK_NO_LIGHT:
569 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
570 "(no light detected)\n",
571 zfcp_get_busid_by_adapter(adapter));
572 break;
573 case FSF_PSQ_LINK_WRAP_PLUG:
574 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
575 "(wrap plug detected)\n",
576 zfcp_get_busid_by_adapter(adapter));
577 break;
578 case FSF_PSQ_LINK_NO_FCP:
579 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
580 "(adjacent node on link does not support FCP)\n",
581 zfcp_get_busid_by_adapter(adapter));
582 break;
583 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
584 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
585 "(firmware update in progress)\n",
586 zfcp_get_busid_by_adapter(adapter));
587 break;
588 case FSF_PSQ_LINK_INVALID_WWPN:
589 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
590 "(duplicate or invalid WWPN detected)\n",
591 zfcp_get_busid_by_adapter(adapter));
592 break;
593 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
594 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
595 "(no support for NPIV by Fabric)\n",
596 zfcp_get_busid_by_adapter(adapter));
597 break;
598 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
599 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
600 "(out of resource in FCP daughtercard)\n",
601 zfcp_get_busid_by_adapter(adapter));
602 break;
603 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
604 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
605 "(out of resource in Fabric)\n",
606 zfcp_get_busid_by_adapter(adapter));
607 break;
608 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
609 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
610 "(unable to Fabric login)\n",
611 zfcp_get_busid_by_adapter(adapter));
612 break;
613 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
614 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
615 zfcp_get_busid_by_adapter(adapter));
616 break;
617 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
618 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
619 zfcp_get_busid_by_adapter(adapter));
620 break;
621 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
622 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
623 zfcp_get_busid_by_adapter(adapter));
624 break;
625 default:
626 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
627 "(warning: unknown reason code %d)\n",
628 zfcp_get_busid_by_adapter(adapter),
629 link_down->error_code);
630 }
631
632 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
633 ZFCP_LOG_DEBUG("Debug information to link down: "
634 "primary_status=0x%02x "
635 "ioerr_code=0x%02x "
636 "action_code=0x%02x "
637 "reason_code=0x%02x "
638 "explanation_code=0x%02x "
639 "vendor_specific_code=0x%02x\n",
640 link_down->primary_status,
641 link_down->ioerr_code,
642 link_down->action_code,
643 link_down->reason_code,
644 link_down->explanation_code,
645 link_down->vendor_specific_code);
646
647 out:
648 zfcp_erp_adapter_failed(adapter);
649 }
650
651 /*
652 * function: zfcp_fsf_req_dispatch
653 *
654 * purpose: calls the appropriate command specific handler
655 *
656 * returns:
657 */
658 static int
659 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
660 {
661 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
662 struct zfcp_adapter *adapter = fsf_req->adapter;
663 int retval = 0;
664
665
666 switch (fsf_req->fsf_command) {
667
668 case FSF_QTCB_FCP_CMND:
669 zfcp_fsf_send_fcp_command_handler(fsf_req);
670 break;
671
672 case FSF_QTCB_ABORT_FCP_CMND:
673 zfcp_fsf_abort_fcp_command_handler(fsf_req);
674 break;
675
676 case FSF_QTCB_SEND_GENERIC:
677 zfcp_fsf_send_ct_handler(fsf_req);
678 break;
679
680 case FSF_QTCB_OPEN_PORT_WITH_DID:
681 zfcp_fsf_open_port_handler(fsf_req);
682 break;
683
684 case FSF_QTCB_OPEN_LUN:
685 zfcp_fsf_open_unit_handler(fsf_req);
686 break;
687
688 case FSF_QTCB_CLOSE_LUN:
689 zfcp_fsf_close_unit_handler(fsf_req);
690 break;
691
692 case FSF_QTCB_CLOSE_PORT:
693 zfcp_fsf_close_port_handler(fsf_req);
694 break;
695
696 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
697 zfcp_fsf_close_physical_port_handler(fsf_req);
698 break;
699
700 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
701 zfcp_fsf_exchange_config_data_handler(fsf_req);
702 break;
703
704 case FSF_QTCB_EXCHANGE_PORT_DATA:
705 zfcp_fsf_exchange_port_data_handler(fsf_req);
706 break;
707
708 case FSF_QTCB_SEND_ELS:
709 zfcp_fsf_send_els_handler(fsf_req);
710 break;
711
712 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
713 zfcp_fsf_control_file_handler(fsf_req);
714 break;
715
716 case FSF_QTCB_UPLOAD_CONTROL_FILE:
717 zfcp_fsf_control_file_handler(fsf_req);
718 break;
719
720 default:
721 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
722 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
723 "not supported by the adapter %s\n",
724 zfcp_get_busid_by_adapter(adapter));
725 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
726 ZFCP_LOG_NORMAL
727 ("bug: Command issued by the device driver differs "
728 "from the command returned by the adapter %s "
729 "(debug info 0x%x, 0x%x).\n",
730 zfcp_get_busid_by_adapter(adapter),
731 fsf_req->fsf_command,
732 fsf_req->qtcb->header.fsf_command);
733 }
734
735 if (!erp_action)
736 return retval;
737
738 zfcp_erp_async_handler(erp_action, 0);
739
740 return retval;
741 }
742
743 /*
744 * function: zfcp_fsf_status_read
745 *
746 * purpose: initiates a Status Read command at the specified adapter
747 *
748 * returns:
749 */
750 int
751 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
752 {
753 struct zfcp_fsf_req *fsf_req;
754 struct fsf_status_read_buffer *status_buffer;
755 unsigned long lock_flags;
756 volatile struct qdio_buffer_element *sbale;
757 int retval = 0;
758
759 /* setup new FSF request */
760 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
761 req_flags | ZFCP_REQ_NO_QTCB,
762 adapter->pool.fsf_req_status_read,
763 &lock_flags, &fsf_req);
764 if (retval < 0) {
765 ZFCP_LOG_INFO("error: Could not create unsolicited status "
766 "buffer for adapter %s.\n",
767 zfcp_get_busid_by_adapter(adapter));
768 goto failed_req_create;
769 }
770
771 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
772 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
773 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
774 fsf_req->sbale_curr = 2;
775
776 status_buffer =
777 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
778 if (!status_buffer) {
779 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
780 goto failed_buf;
781 }
782 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
783 fsf_req->data = (unsigned long) status_buffer;
784
785 /* insert pointer to respective buffer */
786 sbale = zfcp_qdio_sbale_curr(fsf_req);
787 sbale->addr = (void *) status_buffer;
788 sbale->length = sizeof(struct fsf_status_read_buffer);
789
790 retval = zfcp_fsf_req_send(fsf_req);
791 if (retval) {
792 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
793 "environment.\n");
794 goto failed_req_send;
795 }
796
797 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
798 zfcp_get_busid_by_adapter(adapter));
799 goto out;
800
801 failed_req_send:
802 mempool_free(status_buffer, adapter->pool.data_status_read);
803
804 failed_buf:
805 zfcp_fsf_req_free(fsf_req);
806 failed_req_create:
807 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
808 out:
809 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
810 return retval;
811 }
812
813 static int
814 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
815 {
816 struct fsf_status_read_buffer *status_buffer;
817 struct zfcp_adapter *adapter;
818 struct zfcp_port *port;
819 unsigned long flags;
820
821 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
822 adapter = fsf_req->adapter;
823
824 read_lock_irqsave(&zfcp_data.config_lock, flags);
825 list_for_each_entry(port, &adapter->port_list_head, list)
826 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
827 break;
828 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
829
830 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
831 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
832 "nonexisting port with d_id 0x%08x on "
833 "adapter %s. Ignored.\n",
834 status_buffer->d_id & ZFCP_DID_MASK,
835 zfcp_get_busid_by_adapter(adapter));
836 goto out;
837 }
838
839 switch (status_buffer->status_subtype) {
840
841 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
842 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
843 zfcp_erp_port_reopen(port, 0);
844 break;
845
846 case FSF_STATUS_READ_SUB_ERROR_PORT:
847 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
848 zfcp_erp_port_shutdown(port, 0);
849 break;
850
851 default:
852 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
853 debug_exception(adapter->erp_dbf, 0,
854 &status_buffer->status_subtype, sizeof (u32));
855 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
856 "for a reopen indication on port with "
857 "d_id 0x%08x on the adapter %s. "
858 "Ignored. (debug info 0x%x)\n",
859 status_buffer->d_id,
860 zfcp_get_busid_by_adapter(adapter),
861 status_buffer->status_subtype);
862 }
863 out:
864 return 0;
865 }
866
867 /*
868 * function: zfcp_fsf_status_read_handler
869 *
870 * purpose: is called for finished Open Port command
871 *
872 * returns:
873 */
874 static int
875 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
876 {
877 int retval = 0;
878 struct zfcp_adapter *adapter = fsf_req->adapter;
879 struct fsf_status_read_buffer *status_buffer =
880 (struct fsf_status_read_buffer *) fsf_req->data;
881 struct fsf_bit_error_payload *fsf_bit_error;
882
883 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
884 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
885 mempool_free(status_buffer, adapter->pool.data_status_read);
886 zfcp_fsf_req_free(fsf_req);
887 goto out;
888 }
889
890 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
891
892 switch (status_buffer->status_type) {
893
894 case FSF_STATUS_READ_PORT_CLOSED:
895 zfcp_fsf_status_read_port_closed(fsf_req);
896 break;
897
898 case FSF_STATUS_READ_INCOMING_ELS:
899 zfcp_fsf_incoming_els(fsf_req);
900 break;
901
902 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
903 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
904 zfcp_get_busid_by_adapter(adapter));
905 break;
906
907 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
908 fsf_bit_error = (struct fsf_bit_error_payload *)
909 status_buffer->payload;
910 ZFCP_LOG_NORMAL("Warning: bit error threshold data "
911 "received (adapter %s, "
912 "link failures = %i, loss of sync errors = %i, "
913 "loss of signal errors = %i, "
914 "primitive sequence errors = %i, "
915 "invalid transmission word errors = %i, "
916 "CRC errors = %i)\n",
917 zfcp_get_busid_by_adapter(adapter),
918 fsf_bit_error->link_failure_error_count,
919 fsf_bit_error->loss_of_sync_error_count,
920 fsf_bit_error->loss_of_signal_error_count,
921 fsf_bit_error->primitive_sequence_error_count,
922 fsf_bit_error->invalid_transmission_word_error_count,
923 fsf_bit_error->crc_error_count);
924 ZFCP_LOG_INFO("Additional bit error threshold data "
925 "(adapter %s, "
926 "primitive sequence event time-outs = %i, "
927 "elastic buffer overrun errors = %i, "
928 "advertised receive buffer-to-buffer credit = %i, "
929 "current receice buffer-to-buffer credit = %i, "
930 "advertised transmit buffer-to-buffer credit = %i, "
931 "current transmit buffer-to-buffer credit = %i)\n",
932 zfcp_get_busid_by_adapter(adapter),
933 fsf_bit_error->primitive_sequence_event_timeout_count,
934 fsf_bit_error->elastic_buffer_overrun_error_count,
935 fsf_bit_error->advertised_receive_b2b_credit,
936 fsf_bit_error->current_receive_b2b_credit,
937 fsf_bit_error->advertised_transmit_b2b_credit,
938 fsf_bit_error->current_transmit_b2b_credit);
939 break;
940
941 case FSF_STATUS_READ_LINK_DOWN:
942 switch (status_buffer->status_subtype) {
943 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
944 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
945 zfcp_get_busid_by_adapter(adapter));
946 zfcp_fsf_link_down_info_eval(adapter,
947 (struct fsf_link_down_info *)
948 &status_buffer->payload);
949 break;
950 case FSF_STATUS_READ_SUB_FDISC_FAILED:
951 ZFCP_LOG_INFO("Local link to adapter %s is down "
952 "due to failed FDISC login\n",
953 zfcp_get_busid_by_adapter(adapter));
954 zfcp_fsf_link_down_info_eval(adapter,
955 (struct fsf_link_down_info *)
956 &status_buffer->payload);
957 break;
958 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
959 ZFCP_LOG_INFO("Local link to adapter %s is down "
960 "due to firmware update on adapter\n",
961 zfcp_get_busid_by_adapter(adapter));
962 zfcp_fsf_link_down_info_eval(adapter, NULL);
963 break;
964 default:
965 ZFCP_LOG_INFO("Local link to adapter %s is down "
966 "due to unknown reason\n",
967 zfcp_get_busid_by_adapter(adapter));
968 zfcp_fsf_link_down_info_eval(adapter, NULL);
969 };
970 break;
971
972 case FSF_STATUS_READ_LINK_UP:
973 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
974 "Restarting operations on this adapter\n",
975 zfcp_get_busid_by_adapter(adapter));
976 /* All ports should be marked as ready to run again */
977 zfcp_erp_modify_adapter_status(adapter,
978 ZFCP_STATUS_COMMON_RUNNING,
979 ZFCP_SET);
980 zfcp_erp_adapter_reopen(adapter,
981 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
982 | ZFCP_STATUS_COMMON_ERP_FAILED);
983 break;
984
985 case FSF_STATUS_READ_NOTIFICATION_LOST:
986 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
987 "adapter %s%s%s%s%s%s%s%s%s\n",
988 zfcp_get_busid_by_adapter(adapter),
989 (status_buffer->status_subtype &
990 FSF_STATUS_READ_SUB_INCOMING_ELS) ?
991 ", incoming ELS" : "",
992 (status_buffer->status_subtype &
993 FSF_STATUS_READ_SUB_SENSE_DATA) ?
994 ", sense data" : "",
995 (status_buffer->status_subtype &
996 FSF_STATUS_READ_SUB_LINK_STATUS) ?
997 ", link status change" : "",
998 (status_buffer->status_subtype &
999 FSF_STATUS_READ_SUB_PORT_CLOSED) ?
1000 ", port close" : "",
1001 (status_buffer->status_subtype &
1002 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
1003 ", bit error exception" : "",
1004 (status_buffer->status_subtype &
1005 FSF_STATUS_READ_SUB_ACT_UPDATED) ?
1006 ", ACT update" : "",
1007 (status_buffer->status_subtype &
1008 FSF_STATUS_READ_SUB_ACT_HARDENED) ?
1009 ", ACT hardening" : "",
1010 (status_buffer->status_subtype &
1011 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
1012 ", adapter feature change" : "");
1013
1014 if (status_buffer->status_subtype &
1015 FSF_STATUS_READ_SUB_ACT_UPDATED)
1016 zfcp_erp_adapter_access_changed(adapter);
1017 break;
1018
1019 case FSF_STATUS_READ_CFDC_UPDATED:
1020 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
1021 zfcp_get_busid_by_adapter(adapter));
1022 zfcp_erp_adapter_access_changed(adapter);
1023 break;
1024
1025 case FSF_STATUS_READ_CFDC_HARDENED:
1026 switch (status_buffer->status_subtype) {
1027 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
1028 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
1029 zfcp_get_busid_by_adapter(adapter));
1030 break;
1031 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
1032 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
1033 "to the secondary SE\n",
1034 zfcp_get_busid_by_adapter(adapter));
1035 break;
1036 default:
1037 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
1038 zfcp_get_busid_by_adapter(adapter));
1039 }
1040 break;
1041
1042 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
1043 debug_text_event(adapter->erp_dbf, 2, "unsol_features:");
1044 ZFCP_LOG_INFO("List of supported features on adapter %s has "
1045 "been changed from 0x%08X to 0x%08X\n",
1046 zfcp_get_busid_by_adapter(adapter),
1047 *(u32*) (status_buffer->payload + 4),
1048 *(u32*) (status_buffer->payload));
1049 adapter->adapter_features = *(u32*) status_buffer->payload;
1050 break;
1051
1052 default:
1053 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1054 "type was received (debug info 0x%x)\n",
1055 status_buffer->status_type);
1056 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1057 status_buffer);
1058 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1059 (char *) status_buffer,
1060 sizeof (struct fsf_status_read_buffer));
1061 break;
1062 }
1063 mempool_free(status_buffer, adapter->pool.data_status_read);
1064 zfcp_fsf_req_free(fsf_req);
1065 /*
1066 * recycle buffer and start new request repeat until outbound
1067 * queue is empty or adapter shutdown is requested
1068 */
1069 /*
1070 * FIXME(qdio):
1071 * we may wait in the req_create for 5s during shutdown, so
1072 * qdio_cleanup will have to wait at least that long before returning
1073 * with failure to allow us a proper cleanup under all circumstances
1074 */
1075 /*
1076 * FIXME:
1077 * allocation failure possible? (Is this code needed?)
1078 */
1079 retval = zfcp_fsf_status_read(adapter, 0);
1080 if (retval < 0) {
1081 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1082 "request for the adapter %s.\n",
1083 zfcp_get_busid_by_adapter(adapter));
1084 /* temporary fix to avoid status read buffer shortage */
1085 adapter->status_read_failed++;
1086 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1087 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1088 ZFCP_LOG_INFO("restart adapter %s due to status read "
1089 "buffer shortage\n",
1090 zfcp_get_busid_by_adapter(adapter));
1091 zfcp_erp_adapter_reopen(adapter, 0);
1092 }
1093 }
1094 out:
1095 return retval;
1096 }
1097
1098 /*
1099 * function: zfcp_fsf_abort_fcp_command
1100 *
1101 * purpose: tells FSF to abort a running SCSI command
1102 *
1103 * returns: address of initiated FSF request
1104 * NULL - request could not be initiated
1105 *
1106 * FIXME(design): should be watched by a timeout !!!
1107 * FIXME(design) shouldn't this be modified to return an int
1108 * also...don't know how though
1109 */
1110 struct zfcp_fsf_req *
1111 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1112 struct zfcp_adapter *adapter,
1113 struct zfcp_unit *unit, int req_flags)
1114 {
1115 volatile struct qdio_buffer_element *sbale;
1116 struct zfcp_fsf_req *fsf_req = NULL;
1117 unsigned long lock_flags;
1118 int retval = 0;
1119
1120 /* setup new FSF request */
1121 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1122 req_flags, adapter->pool.fsf_req_abort,
1123 &lock_flags, &fsf_req);
1124 if (retval < 0) {
1125 ZFCP_LOG_INFO("error: Failed to create an abort command "
1126 "request for lun 0x%016Lx on port 0x%016Lx "
1127 "on adapter %s.\n",
1128 unit->fcp_lun,
1129 unit->port->wwpn,
1130 zfcp_get_busid_by_adapter(adapter));
1131 goto out;
1132 }
1133
1134 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1135 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1136 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1137
1138 fsf_req->data = (unsigned long) unit;
1139
1140 /* set handles of unit and its parent port in QTCB */
1141 fsf_req->qtcb->header.lun_handle = unit->handle;
1142 fsf_req->qtcb->header.port_handle = unit->port->handle;
1143
1144 /* set handle of request which should be aborted */
1145 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1146
1147 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
1148 retval = zfcp_fsf_req_send(fsf_req);
1149 if (retval) {
1150 ZFCP_LOG_INFO("error: Failed to send abort command request "
1151 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1152 zfcp_get_busid_by_adapter(adapter),
1153 unit->port->wwpn, unit->fcp_lun);
1154 zfcp_fsf_req_free(fsf_req);
1155 fsf_req = NULL;
1156 goto out;
1157 }
1158
1159 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1160 "(adapter%s, port d_id=0x%08x, "
1161 "unit x%016Lx, old_req_id=0x%lx)\n",
1162 zfcp_get_busid_by_adapter(adapter),
1163 unit->port->d_id,
1164 unit->fcp_lun, old_req_id);
1165 out:
1166 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1167 return fsf_req;
1168 }
1169
1170 /*
1171 * function: zfcp_fsf_abort_fcp_command_handler
1172 *
1173 * purpose: is called for finished Abort FCP Command request
1174 *
1175 * returns:
1176 */
1177 static int
1178 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1179 {
1180 int retval = -EINVAL;
1181 struct zfcp_unit *unit;
1182 unsigned char status_qual =
1183 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1184
1185 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1186 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1187 goto skip_fsfstatus;
1188 }
1189
1190 unit = (struct zfcp_unit *) new_fsf_req->data;
1191
1192 /* evaluate FSF status in QTCB */
1193 switch (new_fsf_req->qtcb->header.fsf_status) {
1194
1195 case FSF_PORT_HANDLE_NOT_VALID:
1196 if (status_qual >> 4 != status_qual % 0xf) {
1197 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1198 "fsf_s_phand_nv0");
1199 /*
1200 * In this case a command that was sent prior to a port
1201 * reopen was aborted (handles are different). This is
1202 * fine.
1203 */
1204 } else {
1205 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1206 "port 0x%016Lx on adapter %s invalid. "
1207 "This may happen occasionally.\n",
1208 unit->port->handle,
1209 unit->port->wwpn,
1210 zfcp_get_busid_by_unit(unit));
1211 ZFCP_LOG_INFO("status qualifier:\n");
1212 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1213 (char *) &new_fsf_req->qtcb->header.
1214 fsf_status_qual,
1215 sizeof (union fsf_status_qual));
1216 /* Let's hope this sorts out the mess */
1217 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1218 "fsf_s_phand_nv1");
1219 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1220 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1221 }
1222 break;
1223
1224 case FSF_LUN_HANDLE_NOT_VALID:
1225 if (status_qual >> 4 != status_qual % 0xf) {
1226 /* 2 */
1227 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1228 "fsf_s_lhand_nv0");
1229 /*
1230 * In this case a command that was sent prior to a unit
1231 * reopen was aborted (handles are different).
1232 * This is fine.
1233 */
1234 } else {
1235 ZFCP_LOG_INFO
1236 ("Warning: Temporary LUN identifier 0x%x of LUN "
1237 "0x%016Lx on port 0x%016Lx on adapter %s is "
1238 "invalid. This may happen in rare cases. "
1239 "Trying to re-establish link.\n",
1240 unit->handle,
1241 unit->fcp_lun,
1242 unit->port->wwpn,
1243 zfcp_get_busid_by_unit(unit));
1244 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1245 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1246 (char *) &new_fsf_req->qtcb->header.
1247 fsf_status_qual,
1248 sizeof (union fsf_status_qual));
1249 /* Let's hope this sorts out the mess */
1250 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1251 "fsf_s_lhand_nv1");
1252 zfcp_erp_port_reopen(unit->port, 0);
1253 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1254 }
1255 break;
1256
1257 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1258 retval = 0;
1259 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1260 "fsf_s_no_exist");
1261 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1262 break;
1263
1264 case FSF_PORT_BOXED:
1265 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1266 "be reopened\n", unit->port->wwpn,
1267 zfcp_get_busid_by_unit(unit));
1268 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1269 "fsf_s_pboxed");
1270 zfcp_erp_port_boxed(unit->port);
1271 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1272 | ZFCP_STATUS_FSFREQ_RETRY;
1273 break;
1274
1275 case FSF_LUN_BOXED:
1276 ZFCP_LOG_INFO(
1277 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1278 "to be reopened\n",
1279 unit->fcp_lun, unit->port->wwpn,
1280 zfcp_get_busid_by_unit(unit));
1281 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1282 zfcp_erp_unit_boxed(unit);
1283 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1284 | ZFCP_STATUS_FSFREQ_RETRY;
1285 break;
1286
1287 case FSF_ADAPTER_STATUS_AVAILABLE:
1288 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1289 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1290 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1291 "fsf_sq_ltest");
1292 zfcp_test_link(unit->port);
1293 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1294 break;
1295 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1296 /* SCSI stack will escalate */
1297 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1298 "fsf_sq_ulp");
1299 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1300 break;
1301 default:
1302 ZFCP_LOG_NORMAL
1303 ("bug: Wrong status qualifier 0x%x arrived.\n",
1304 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1305 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1306 "fsf_sq_inval:");
1307 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1308 &new_fsf_req->qtcb->header.
1309 fsf_status_qual.word[0], sizeof (u32));
1310 break;
1311 }
1312 break;
1313
1314 case FSF_GOOD:
1315 retval = 0;
1316 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1317 break;
1318
1319 default:
1320 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1321 "(debug info 0x%x)\n",
1322 new_fsf_req->qtcb->header.fsf_status);
1323 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1324 "fsf_s_inval:");
1325 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1326 &new_fsf_req->qtcb->header.fsf_status,
1327 sizeof (u32));
1328 break;
1329 }
1330 skip_fsfstatus:
1331 return retval;
1332 }
1333
1334 /**
1335 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1336 * one SBALE
1337 * Two scatter-gather lists are passed, one for the reqeust and one for the
1338 * response.
1339 */
1340 static inline int
1341 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1342 struct scatterlist *resp, int resp_count)
1343 {
1344 return ((req_count == 1) &&
1345 (resp_count == 1) &&
1346 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1347 PAGE_MASK) ==
1348 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1349 req[0].length - 1) & PAGE_MASK)) &&
1350 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1351 PAGE_MASK) ==
1352 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1353 resp[0].length - 1) & PAGE_MASK)));
1354 }
1355
1356 /**
1357 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1358 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1359 * the request
1360 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1361 * a struct zfcp_fsf_req
1362 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1363 * is sent within error recovery
1364 */
1365 int
1366 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1367 struct zfcp_erp_action *erp_action)
1368 {
1369 volatile struct qdio_buffer_element *sbale;
1370 struct zfcp_port *port;
1371 struct zfcp_adapter *adapter;
1372 struct zfcp_fsf_req *fsf_req;
1373 unsigned long lock_flags;
1374 int bytes;
1375 int ret = 0;
1376
1377 port = ct->port;
1378 adapter = port->adapter;
1379
1380 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1381 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1382 pool, &lock_flags, &fsf_req);
1383 if (ret < 0) {
1384 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1385 "adapter: %s\n",
1386 zfcp_get_busid_by_adapter(adapter));
1387 goto failed_req;
1388 }
1389
1390 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1391 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1392 ct->resp, ct->resp_count)){
1393 /* both request buffer and response buffer
1394 fit into one sbale each */
1395 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1396 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1397 sbale[2].length = ct->req[0].length;
1398 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1399 sbale[3].length = ct->resp[0].length;
1400 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1401 } else if (adapter->adapter_features &
1402 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1403 /* try to use chained SBALs */
1404 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1405 SBAL_FLAGS0_TYPE_WRITE_READ,
1406 ct->req, ct->req_count,
1407 ZFCP_MAX_SBALS_PER_CT_REQ);
1408 if (bytes <= 0) {
1409 ZFCP_LOG_INFO("error: creation of CT request failed "
1410 "on adapter %s\n",
1411 zfcp_get_busid_by_adapter(adapter));
1412 if (bytes == 0)
1413 ret = -ENOMEM;
1414 else
1415 ret = bytes;
1416
1417 goto failed_send;
1418 }
1419 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1420 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1421 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1422 SBAL_FLAGS0_TYPE_WRITE_READ,
1423 ct->resp, ct->resp_count,
1424 ZFCP_MAX_SBALS_PER_CT_REQ);
1425 if (bytes <= 0) {
1426 ZFCP_LOG_INFO("error: creation of CT request failed "
1427 "on adapter %s\n",
1428 zfcp_get_busid_by_adapter(adapter));
1429 if (bytes == 0)
1430 ret = -ENOMEM;
1431 else
1432 ret = bytes;
1433
1434 goto failed_send;
1435 }
1436 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1437 } else {
1438 /* reject send generic request */
1439 ZFCP_LOG_INFO(
1440 "error: microcode does not support chained SBALs,"
1441 "CT request too big (adapter %s)\n",
1442 zfcp_get_busid_by_adapter(adapter));
1443 ret = -EOPNOTSUPP;
1444 goto failed_send;
1445 }
1446
1447 /* settings in QTCB */
1448 fsf_req->qtcb->header.port_handle = port->handle;
1449 fsf_req->qtcb->bottom.support.service_class =
1450 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1451 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1452 fsf_req->data = (unsigned long) ct;
1453
1454 zfcp_san_dbf_event_ct_request(fsf_req);
1455
1456 if (erp_action) {
1457 erp_action->fsf_req = fsf_req;
1458 fsf_req->erp_action = erp_action;
1459 zfcp_erp_start_timer(fsf_req);
1460 } else
1461 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1462
1463 ret = zfcp_fsf_req_send(fsf_req);
1464 if (ret) {
1465 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1466 "(adapter %s, port 0x%016Lx)\n",
1467 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1468 goto failed_send;
1469 }
1470
1471 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1472 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1473 goto out;
1474
1475 failed_send:
1476 zfcp_fsf_req_free(fsf_req);
1477 if (erp_action != NULL) {
1478 erp_action->fsf_req = NULL;
1479 }
1480 failed_req:
1481 out:
1482 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1483 lock_flags);
1484 return ret;
1485 }
1486
1487 /**
1488 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1489 * @fsf_req: pointer to struct zfcp_fsf_req
1490 *
1491 * Data specific for the Generic Service request is passed using
1492 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1493 * Usually a specific handler for the CT request is called which is
1494 * found in this structure.
1495 */
1496 static int
1497 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1498 {
1499 struct zfcp_port *port;
1500 struct zfcp_adapter *adapter;
1501 struct zfcp_send_ct *send_ct;
1502 struct fsf_qtcb_header *header;
1503 struct fsf_qtcb_bottom_support *bottom;
1504 int retval = -EINVAL;
1505 u16 subtable, rule, counter;
1506
1507 adapter = fsf_req->adapter;
1508 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1509 port = send_ct->port;
1510 header = &fsf_req->qtcb->header;
1511 bottom = &fsf_req->qtcb->bottom.support;
1512
1513 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1514 goto skip_fsfstatus;
1515
1516 /* evaluate FSF status in QTCB */
1517 switch (header->fsf_status) {
1518
1519 case FSF_GOOD:
1520 zfcp_san_dbf_event_ct_response(fsf_req);
1521 retval = 0;
1522 break;
1523
1524 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1525 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1526 "class %d.\n",
1527 zfcp_get_busid_by_port(port),
1528 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1529 /* stop operation for this adapter */
1530 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1531 zfcp_erp_adapter_shutdown(adapter, 0);
1532 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1533 break;
1534
1535 case FSF_ADAPTER_STATUS_AVAILABLE:
1536 switch (header->fsf_status_qual.word[0]){
1537 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1538 /* reopening link to port */
1539 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1540 zfcp_test_link(port);
1541 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1542 break;
1543 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1544 /* ERP strategy will escalate */
1545 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1546 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1547 break;
1548 default:
1549 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1550 "arrived.\n",
1551 header->fsf_status_qual.word[0]);
1552 break;
1553 }
1554 break;
1555
1556 case FSF_ACCESS_DENIED:
1557 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1558 "command (adapter %s, port d_id=0x%08x)\n",
1559 zfcp_get_busid_by_port(port), port->d_id);
1560 for (counter = 0; counter < 2; counter++) {
1561 subtable = header->fsf_status_qual.halfword[counter * 2];
1562 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1563 switch (subtable) {
1564 case FSF_SQ_CFDC_SUBTABLE_OS:
1565 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1566 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1567 case FSF_SQ_CFDC_SUBTABLE_LUN:
1568 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1569 zfcp_act_subtable_type[subtable], rule);
1570 break;
1571 }
1572 }
1573 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1574 zfcp_erp_port_access_denied(port);
1575 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1576 break;
1577
1578 case FSF_GENERIC_COMMAND_REJECTED:
1579 ZFCP_LOG_INFO("generic service command rejected "
1580 "(adapter %s, port d_id=0x%08x)\n",
1581 zfcp_get_busid_by_port(port), port->d_id);
1582 ZFCP_LOG_INFO("status qualifier:\n");
1583 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1584 (char *) &header->fsf_status_qual,
1585 sizeof (union fsf_status_qual));
1586 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1587 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588 break;
1589
1590 case FSF_PORT_HANDLE_NOT_VALID:
1591 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1592 "0x%016Lx on adapter %s invalid. This may "
1593 "happen occasionally.\n", port->handle,
1594 port->wwpn, zfcp_get_busid_by_port(port));
1595 ZFCP_LOG_INFO("status qualifier:\n");
1596 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1597 (char *) &header->fsf_status_qual,
1598 sizeof (union fsf_status_qual));
1599 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1600 zfcp_erp_adapter_reopen(adapter, 0);
1601 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1602 break;
1603
1604 case FSF_PORT_BOXED:
1605 ZFCP_LOG_INFO("port needs to be reopened "
1606 "(adapter %s, port d_id=0x%08x)\n",
1607 zfcp_get_busid_by_port(port), port->d_id);
1608 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1609 zfcp_erp_port_boxed(port);
1610 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1611 | ZFCP_STATUS_FSFREQ_RETRY;
1612 break;
1613
1614 /* following states should never occure, all cases avoided
1615 in zfcp_fsf_send_ct - but who knows ... */
1616 case FSF_PAYLOAD_SIZE_MISMATCH:
1617 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1618 "req_buf_length=%d, resp_buf_length=%d)\n",
1619 zfcp_get_busid_by_adapter(adapter),
1620 bottom->req_buf_length, bottom->resp_buf_length);
1621 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1622 break;
1623 case FSF_REQUEST_SIZE_TOO_LARGE:
1624 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1625 "req_buf_length=%d)\n",
1626 zfcp_get_busid_by_adapter(adapter),
1627 bottom->req_buf_length);
1628 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1629 break;
1630 case FSF_RESPONSE_SIZE_TOO_LARGE:
1631 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1632 "resp_buf_length=%d)\n",
1633 zfcp_get_busid_by_adapter(adapter),
1634 bottom->resp_buf_length);
1635 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1636 break;
1637 case FSF_SBAL_MISMATCH:
1638 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1639 "resp_buf_length=%d)\n",
1640 zfcp_get_busid_by_adapter(adapter),
1641 bottom->req_buf_length, bottom->resp_buf_length);
1642 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1643 break;
1644
1645 default:
1646 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1647 "(debug info 0x%x)\n", header->fsf_status);
1648 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1649 debug_exception(adapter->erp_dbf, 0,
1650 &header->fsf_status_qual.word[0], sizeof (u32));
1651 break;
1652 }
1653
1654 skip_fsfstatus:
1655 send_ct->status = retval;
1656
1657 if (send_ct->handler != NULL)
1658 send_ct->handler(send_ct->handler_data);
1659
1660 return retval;
1661 }
1662
1663 /**
1664 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1665 * @els: pointer to struct zfcp_send_els which contains all needed data for
1666 * the command.
1667 */
1668 int
1669 zfcp_fsf_send_els(struct zfcp_send_els *els)
1670 {
1671 volatile struct qdio_buffer_element *sbale;
1672 struct zfcp_fsf_req *fsf_req;
1673 u32 d_id;
1674 struct zfcp_adapter *adapter;
1675 unsigned long lock_flags;
1676 int bytes;
1677 int ret = 0;
1678
1679 d_id = els->d_id;
1680 adapter = els->adapter;
1681
1682 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1683 ZFCP_REQ_AUTO_CLEANUP,
1684 NULL, &lock_flags, &fsf_req);
1685 if (ret < 0) {
1686 ZFCP_LOG_INFO("error: creation of ELS request failed "
1687 "(adapter %s, port d_id: 0x%08x)\n",
1688 zfcp_get_busid_by_adapter(adapter), d_id);
1689 goto failed_req;
1690 }
1691
1692 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1693 if (zfcp_use_one_sbal(els->req, els->req_count,
1694 els->resp, els->resp_count)){
1695 /* both request buffer and response buffer
1696 fit into one sbale each */
1697 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1698 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1699 sbale[2].length = els->req[0].length;
1700 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1701 sbale[3].length = els->resp[0].length;
1702 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1703 } else if (adapter->adapter_features &
1704 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1705 /* try to use chained SBALs */
1706 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1707 SBAL_FLAGS0_TYPE_WRITE_READ,
1708 els->req, els->req_count,
1709 ZFCP_MAX_SBALS_PER_ELS_REQ);
1710 if (bytes <= 0) {
1711 ZFCP_LOG_INFO("error: creation of ELS request failed "
1712 "(adapter %s, port d_id: 0x%08x)\n",
1713 zfcp_get_busid_by_adapter(adapter), d_id);
1714 if (bytes == 0) {
1715 ret = -ENOMEM;
1716 } else {
1717 ret = bytes;
1718 }
1719 goto failed_send;
1720 }
1721 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1722 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1723 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1724 SBAL_FLAGS0_TYPE_WRITE_READ,
1725 els->resp, els->resp_count,
1726 ZFCP_MAX_SBALS_PER_ELS_REQ);
1727 if (bytes <= 0) {
1728 ZFCP_LOG_INFO("error: creation of ELS request failed "
1729 "(adapter %s, port d_id: 0x%08x)\n",
1730 zfcp_get_busid_by_adapter(adapter), d_id);
1731 if (bytes == 0) {
1732 ret = -ENOMEM;
1733 } else {
1734 ret = bytes;
1735 }
1736 goto failed_send;
1737 }
1738 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1739 } else {
1740 /* reject request */
1741 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1742 ", ELS request too big (adapter %s, "
1743 "port d_id: 0x%08x)\n",
1744 zfcp_get_busid_by_adapter(adapter), d_id);
1745 ret = -EOPNOTSUPP;
1746 goto failed_send;
1747 }
1748
1749 /* settings in QTCB */
1750 fsf_req->qtcb->bottom.support.d_id = d_id;
1751 fsf_req->qtcb->bottom.support.service_class =
1752 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1753 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1754 fsf_req->data = (unsigned long) els;
1755
1756 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1757
1758 zfcp_san_dbf_event_els_request(fsf_req);
1759
1760 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1761 ret = zfcp_fsf_req_send(fsf_req);
1762 if (ret) {
1763 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1764 "(adapter %s, port d_id: 0x%08x)\n",
1765 zfcp_get_busid_by_adapter(adapter), d_id);
1766 goto failed_send;
1767 }
1768
1769 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1770 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1771 goto out;
1772
1773 failed_send:
1774 zfcp_fsf_req_free(fsf_req);
1775
1776 failed_req:
1777 out:
1778 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1779 lock_flags);
1780
1781 return ret;
1782 }
1783
1784 /**
1785 * zfcp_fsf_send_els_handler - handler for ELS commands
1786 * @fsf_req: pointer to struct zfcp_fsf_req
1787 *
1788 * Data specific for the ELS command is passed using
1789 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1790 * Usually a specific handler for the ELS command is called which is
1791 * found in this structure.
1792 */
1793 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1794 {
1795 struct zfcp_adapter *adapter;
1796 struct zfcp_port *port;
1797 u32 d_id;
1798 struct fsf_qtcb_header *header;
1799 struct fsf_qtcb_bottom_support *bottom;
1800 struct zfcp_send_els *send_els;
1801 int retval = -EINVAL;
1802 u16 subtable, rule, counter;
1803
1804 send_els = (struct zfcp_send_els *) fsf_req->data;
1805 adapter = send_els->adapter;
1806 port = send_els->port;
1807 d_id = send_els->d_id;
1808 header = &fsf_req->qtcb->header;
1809 bottom = &fsf_req->qtcb->bottom.support;
1810
1811 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1812 goto skip_fsfstatus;
1813
1814 switch (header->fsf_status) {
1815
1816 case FSF_GOOD:
1817 zfcp_san_dbf_event_els_response(fsf_req);
1818 retval = 0;
1819 break;
1820
1821 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1822 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1823 "class %d.\n",
1824 zfcp_get_busid_by_adapter(adapter),
1825 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1826 /* stop operation for this adapter */
1827 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1828 zfcp_erp_adapter_shutdown(adapter, 0);
1829 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1830 break;
1831
1832 case FSF_ADAPTER_STATUS_AVAILABLE:
1833 switch (header->fsf_status_qual.word[0]){
1834 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1835 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1836 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1837 zfcp_test_link(port);
1838 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1839 break;
1840 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1841 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1842 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1843 retval =
1844 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1845 (struct zfcp_ls_rjt_par *)
1846 &header->fsf_status_qual.word[2]);
1847 break;
1848 case FSF_SQ_RETRY_IF_POSSIBLE:
1849 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1850 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1851 break;
1852 default:
1853 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1854 header->fsf_status_qual.word[0]);
1855 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1856 (char*)header->fsf_status_qual.word, 16);
1857 }
1858 break;
1859
1860 case FSF_ELS_COMMAND_REJECTED:
1861 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1862 "prohibited sending "
1863 "(adapter: %s, port d_id: 0x%08x)\n",
1864 zfcp_get_busid_by_adapter(adapter), d_id);
1865
1866 break;
1867
1868 case FSF_PAYLOAD_SIZE_MISMATCH:
1869 ZFCP_LOG_INFO(
1870 "ELS request size and ELS response size must be either "
1871 "both 0, or both greater than 0 "
1872 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1873 zfcp_get_busid_by_adapter(adapter),
1874 bottom->req_buf_length,
1875 bottom->resp_buf_length);
1876 break;
1877
1878 case FSF_REQUEST_SIZE_TOO_LARGE:
1879 ZFCP_LOG_INFO(
1880 "Length of the ELS request buffer, "
1881 "specified in QTCB bottom, "
1882 "exceeds the size of the buffers "
1883 "that have been allocated for ELS request data "
1884 "(adapter: %s, req_buf_length=%d)\n",
1885 zfcp_get_busid_by_adapter(adapter),
1886 bottom->req_buf_length);
1887 break;
1888
1889 case FSF_RESPONSE_SIZE_TOO_LARGE:
1890 ZFCP_LOG_INFO(
1891 "Length of the ELS response buffer, "
1892 "specified in QTCB bottom, "
1893 "exceeds the size of the buffers "
1894 "that have been allocated for ELS response data "
1895 "(adapter: %s, resp_buf_length=%d)\n",
1896 zfcp_get_busid_by_adapter(adapter),
1897 bottom->resp_buf_length);
1898 break;
1899
1900 case FSF_SBAL_MISMATCH:
1901 /* should never occure, avoided in zfcp_fsf_send_els */
1902 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1903 "resp_buf_length=%d)\n",
1904 zfcp_get_busid_by_adapter(adapter),
1905 bottom->req_buf_length, bottom->resp_buf_length);
1906 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1907 break;
1908
1909 case FSF_ACCESS_DENIED:
1910 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1911 "(adapter %s, port d_id=0x%08x)\n",
1912 zfcp_get_busid_by_adapter(adapter), d_id);
1913 for (counter = 0; counter < 2; counter++) {
1914 subtable = header->fsf_status_qual.halfword[counter * 2];
1915 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1916 switch (subtable) {
1917 case FSF_SQ_CFDC_SUBTABLE_OS:
1918 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1919 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1920 case FSF_SQ_CFDC_SUBTABLE_LUN:
1921 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1922 zfcp_act_subtable_type[subtable], rule);
1923 break;
1924 }
1925 }
1926 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1927 if (port != NULL)
1928 zfcp_erp_port_access_denied(port);
1929 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1930 break;
1931
1932 default:
1933 ZFCP_LOG_NORMAL(
1934 "bug: An unknown FSF Status was presented "
1935 "(adapter: %s, fsf_status=0x%08x)\n",
1936 zfcp_get_busid_by_adapter(adapter),
1937 header->fsf_status);
1938 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1939 debug_exception(adapter->erp_dbf, 0,
1940 &header->fsf_status_qual.word[0], sizeof(u32));
1941 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1942 break;
1943 }
1944
1945 skip_fsfstatus:
1946 send_els->status = retval;
1947
1948 if (send_els->handler != 0)
1949 send_els->handler(send_els->handler_data);
1950
1951 return retval;
1952 }
1953
1954 int
1955 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1956 {
1957 volatile struct qdio_buffer_element *sbale;
1958 struct zfcp_fsf_req *fsf_req;
1959 unsigned long lock_flags;
1960 int retval = 0;
1961
1962 /* setup new FSF request */
1963 retval = zfcp_fsf_req_create(erp_action->adapter,
1964 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1965 ZFCP_REQ_AUTO_CLEANUP,
1966 erp_action->adapter->pool.fsf_req_erp,
1967 &lock_flags, &fsf_req);
1968 if (retval < 0) {
1969 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1970 "data request for adapter %s.\n",
1971 zfcp_get_busid_by_adapter(erp_action->adapter));
1972 goto out;
1973 }
1974
1975 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1976 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1977 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1978
1979 fsf_req->qtcb->bottom.config.feature_selection =
1980 FSF_FEATURE_CFDC |
1981 FSF_FEATURE_LUN_SHARING |
1982 FSF_FEATURE_NOTIFICATION_LOST |
1983 FSF_FEATURE_UPDATE_ALERT;
1984 fsf_req->erp_action = erp_action;
1985 erp_action->fsf_req = fsf_req;
1986
1987 zfcp_erp_start_timer(fsf_req);
1988 retval = zfcp_fsf_req_send(fsf_req);
1989 if (retval) {
1990 ZFCP_LOG_INFO
1991 ("error: Could not send exchange configuration data "
1992 "command on the adapter %s\n",
1993 zfcp_get_busid_by_adapter(erp_action->adapter));
1994 zfcp_fsf_req_free(fsf_req);
1995 erp_action->fsf_req = NULL;
1996 goto out;
1997 }
1998
1999 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
2000 "(adapter %s)\n",
2001 zfcp_get_busid_by_adapter(erp_action->adapter));
2002
2003 out:
2004 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2005 lock_flags);
2006 return retval;
2007 }
2008
2009 /**
2010 * zfcp_fsf_exchange_config_evaluate
2011 * @fsf_req: fsf_req which belongs to xchg config data request
2012 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2013 *
2014 * returns: -EIO on error, 0 otherwise
2015 */
2016 static int
2017 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2018 {
2019 struct fsf_qtcb_bottom_config *bottom;
2020 struct zfcp_adapter *adapter = fsf_req->adapter;
2021 struct Scsi_Host *shost = adapter->scsi_host;
2022
2023 bottom = &fsf_req->qtcb->bottom.config;
2024 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2025 bottom->low_qtcb_version, bottom->high_qtcb_version);
2026 adapter->fsf_lic_version = bottom->lic_version;
2027 adapter->adapter_features = bottom->adapter_features;
2028 adapter->connection_features = bottom->connection_features;
2029 adapter->peer_wwpn = 0;
2030 adapter->peer_wwnn = 0;
2031 adapter->peer_d_id = 0;
2032
2033 if (xchg_ok) {
2034 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
2035 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
2036 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
2037 fc_host_speed(shost) = bottom->fc_link_speed;
2038 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
2039 adapter->hydra_version = bottom->adapter_type;
2040 if (fc_host_permanent_port_name(shost) == -1)
2041 fc_host_permanent_port_name(shost) =
2042 fc_host_port_name(shost);
2043 if (bottom->fc_topology == FSF_TOPO_P2P) {
2044 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2045 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2046 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2047 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
2048 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
2049 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
2050 else if (bottom->fc_topology == FSF_TOPO_AL)
2051 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
2052 else
2053 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
2054 } else {
2055 fc_host_node_name(shost) = 0;
2056 fc_host_port_name(shost) = 0;
2057 fc_host_port_id(shost) = 0;
2058 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
2059 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
2060 adapter->hydra_version = 0;
2061 }
2062
2063 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
2064 adapter->hardware_version = bottom->hardware_version;
2065 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2066 min(FC_SERIAL_NUMBER_SIZE, 17));
2067 EBCASC(fc_host_serial_number(shost),
2068 min(FC_SERIAL_NUMBER_SIZE, 17));
2069 }
2070
2071 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
2072 "WWNN 0x%016Lx, "
2073 "WWPN 0x%016Lx, "
2074 "S_ID 0x%08x,\n"
2075 "adapter version 0x%x, "
2076 "LIC version 0x%x, "
2077 "FC link speed %d Gb/s\n",
2078 zfcp_get_busid_by_adapter(adapter),
2079 (wwn_t) fc_host_node_name(shost),
2080 (wwn_t) fc_host_port_name(shost),
2081 fc_host_port_id(shost),
2082 adapter->hydra_version,
2083 adapter->fsf_lic_version,
2084 fc_host_speed(shost));
2085 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2086 ZFCP_LOG_NORMAL("error: the adapter %s "
2087 "only supports newer control block "
2088 "versions in comparison to this device "
2089 "driver (try updated device driver)\n",
2090 zfcp_get_busid_by_adapter(adapter));
2091 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2092 zfcp_erp_adapter_shutdown(adapter, 0);
2093 return -EIO;
2094 }
2095 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2096 ZFCP_LOG_NORMAL("error: the adapter %s "
2097 "only supports older control block "
2098 "versions than this device driver uses"
2099 "(consider a microcode upgrade)\n",
2100 zfcp_get_busid_by_adapter(adapter));
2101 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2102 zfcp_erp_adapter_shutdown(adapter, 0);
2103 return -EIO;
2104 }
2105 return 0;
2106 }
2107
2108 /*
2109 * function: zfcp_fsf_exchange_config_data_handler
2110 *
2111 * purpose: is called for finished Exchange Configuration Data command
2112 *
2113 * returns:
2114 */
2115 static int
2116 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2117 {
2118 struct fsf_qtcb_bottom_config *bottom;
2119 struct zfcp_adapter *adapter = fsf_req->adapter;
2120 struct fsf_qtcb *qtcb = fsf_req->qtcb;
2121
2122 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2123 return -EIO;
2124
2125 switch (qtcb->header.fsf_status) {
2126
2127 case FSF_GOOD:
2128 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2129 return -EIO;
2130
2131 switch (fc_host_port_type(adapter->scsi_host)) {
2132 case FC_PORTTYPE_PTP:
2133 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2134 "configuration detected at adapter %s\n"
2135 "Peer WWNN 0x%016llx, "
2136 "peer WWPN 0x%016llx, "
2137 "peer d_id 0x%06x\n",
2138 zfcp_get_busid_by_adapter(adapter),
2139 adapter->peer_wwnn,
2140 adapter->peer_wwpn,
2141 adapter->peer_d_id);
2142 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2143 "top-p-to-p");
2144 break;
2145 case FC_PORTTYPE_NLPORT:
2146 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2147 "topology detected at adapter %s "
2148 "unsupported, shutting down adapter\n",
2149 zfcp_get_busid_by_adapter(adapter));
2150 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2151 "top-al");
2152 zfcp_erp_adapter_shutdown(adapter, 0);
2153 return -EIO;
2154 case FC_PORTTYPE_NPORT:
2155 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
2156 "network detected at adapter %s.\n",
2157 zfcp_get_busid_by_adapter(adapter));
2158 break;
2159 default:
2160 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2161 "reported by the exchange "
2162 "configuration command for "
2163 "the adapter %s is not "
2164 "of a type known to the zfcp "
2165 "driver, shutting down adapter\n",
2166 zfcp_get_busid_by_adapter(adapter));
2167 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2168 "unknown-topo");
2169 zfcp_erp_adapter_shutdown(adapter, 0);
2170 return -EIO;
2171 }
2172 bottom = &qtcb->bottom.config;
2173 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2174 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2175 "allowed by the adapter %s "
2176 "is lower than the minimum "
2177 "required by the driver (%ld bytes).\n",
2178 bottom->max_qtcb_size,
2179 zfcp_get_busid_by_adapter(adapter),
2180 sizeof(struct fsf_qtcb));
2181 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2182 "qtcb-size");
2183 debug_event(fsf_req->adapter->erp_dbf, 0,
2184 &bottom->max_qtcb_size, sizeof (u32));
2185 zfcp_erp_adapter_shutdown(adapter, 0);
2186 return -EIO;
2187 }
2188 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2189 &adapter->status);
2190 break;
2191 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2192 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2193
2194 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2195 return -EIO;
2196
2197 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
2198
2199 zfcp_fsf_link_down_info_eval(adapter,
2200 &qtcb->header.fsf_status_qual.link_down_info);
2201 break;
2202 default:
2203 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2204 debug_event(fsf_req->adapter->erp_dbf, 0,
2205 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2206 zfcp_erp_adapter_shutdown(adapter, 0);
2207 return -EIO;
2208 }
2209 return 0;
2210 }
2211
2212 /**
2213 * zfcp_fsf_exchange_port_data - request information about local port
2214 * @erp_action: ERP action for the adapter for which port data is requested
2215 * @adapter: for which port data is requested
2216 * @data: response to exchange port data request
2217 */
2218 int
2219 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action,
2220 struct zfcp_adapter *adapter,
2221 struct fsf_qtcb_bottom_port *data)
2222 {
2223 volatile struct qdio_buffer_element *sbale;
2224 struct zfcp_fsf_req *fsf_req;
2225 unsigned long lock_flags;
2226 int retval = 0;
2227
2228 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2229 ZFCP_LOG_INFO("error: exchange port data "
2230 "command not supported by adapter %s\n",
2231 zfcp_get_busid_by_adapter(adapter));
2232 return -EOPNOTSUPP;
2233 }
2234
2235 /* setup new FSF request */
2236 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2237 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0,
2238 NULL, &lock_flags, &fsf_req);
2239 if (retval < 0) {
2240 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2241 "exchange port data request for"
2242 "the adapter %s.\n",
2243 zfcp_get_busid_by_adapter(adapter));
2244 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2245 lock_flags);
2246 return retval;
2247 }
2248
2249 if (data)
2250 fsf_req->data = (unsigned long) data;
2251
2252 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2253 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2254 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2255
2256 if (erp_action) {
2257 erp_action->fsf_req = fsf_req;
2258 fsf_req->erp_action = erp_action;
2259 zfcp_erp_start_timer(fsf_req);
2260 } else
2261 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2262
2263 retval = zfcp_fsf_req_send(fsf_req);
2264 if (retval) {
2265 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2266 "command on the adapter %s\n",
2267 zfcp_get_busid_by_adapter(adapter));
2268 zfcp_fsf_req_free(fsf_req);
2269 if (erp_action)
2270 erp_action->fsf_req = NULL;
2271 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2272 lock_flags);
2273 return retval;
2274 }
2275
2276 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2277
2278 if (!erp_action) {
2279 wait_event(fsf_req->completion_wq,
2280 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2281 zfcp_fsf_req_free(fsf_req);
2282 }
2283 return retval;
2284 }
2285
2286 /**
2287 * zfcp_fsf_exchange_port_evaluate
2288 * @fsf_req: fsf_req which belongs to xchg port data request
2289 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
2290 */
2291 static void
2292 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2293 {
2294 struct zfcp_adapter *adapter;
2295 struct fsf_qtcb *qtcb;
2296 struct fsf_qtcb_bottom_port *bottom, *data;
2297 struct Scsi_Host *shost;
2298
2299 adapter = fsf_req->adapter;
2300 qtcb = fsf_req->qtcb;
2301 bottom = &qtcb->bottom.port;
2302 shost = adapter->scsi_host;
2303
2304 data = (struct fsf_qtcb_bottom_port*) fsf_req->data;
2305 if (data)
2306 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port));
2307
2308 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
2309 fc_host_permanent_port_name(shost) = bottom->wwpn;
2310 else
2311 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
2312 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
2313 fc_host_supported_speeds(shost) = bottom->supported_speed;
2314 }
2315
2316 /**
2317 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2318 * @fsf_req: pointer to struct zfcp_fsf_req
2319 */
2320 static void
2321 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2322 {
2323 struct zfcp_adapter *adapter;
2324 struct fsf_qtcb *qtcb;
2325
2326 adapter = fsf_req->adapter;
2327 qtcb = fsf_req->qtcb;
2328
2329 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2330 return;
2331
2332 switch (qtcb->header.fsf_status) {
2333 case FSF_GOOD:
2334 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
2335 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2336 break;
2337 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2338 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
2339 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2340 zfcp_fsf_link_down_info_eval(adapter,
2341 &qtcb->header.fsf_status_qual.link_down_info);
2342 break;
2343 default:
2344 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");
2345 debug_event(adapter->erp_dbf, 0,
2346 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2347 }
2348 }
2349
2350
2351 /*
2352 * function: zfcp_fsf_open_port
2353 *
2354 * purpose:
2355 *
2356 * returns: address of initiated FSF request
2357 * NULL - request could not be initiated
2358 */
2359 int
2360 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2361 {
2362 volatile struct qdio_buffer_element *sbale;
2363 struct zfcp_fsf_req *fsf_req;
2364 unsigned long lock_flags;
2365 int retval = 0;
2366
2367 /* setup new FSF request */
2368 retval = zfcp_fsf_req_create(erp_action->adapter,
2369 FSF_QTCB_OPEN_PORT_WITH_DID,
2370 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2371 erp_action->adapter->pool.fsf_req_erp,
2372 &lock_flags, &fsf_req);
2373 if (retval < 0) {
2374 ZFCP_LOG_INFO("error: Could not create open port request "
2375 "for port 0x%016Lx on adapter %s.\n",
2376 erp_action->port->wwpn,
2377 zfcp_get_busid_by_adapter(erp_action->adapter));
2378 goto out;
2379 }
2380
2381 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2382 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2383 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2384
2385 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2386 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2387 fsf_req->data = (unsigned long) erp_action->port;
2388 fsf_req->erp_action = erp_action;
2389 erp_action->fsf_req = fsf_req;
2390
2391 zfcp_erp_start_timer(fsf_req);
2392 retval = zfcp_fsf_req_send(fsf_req);
2393 if (retval) {
2394 ZFCP_LOG_INFO("error: Could not send open port request for "
2395 "port 0x%016Lx on adapter %s.\n",
2396 erp_action->port->wwpn,
2397 zfcp_get_busid_by_adapter(erp_action->adapter));
2398 zfcp_fsf_req_free(fsf_req);
2399 erp_action->fsf_req = NULL;
2400 goto out;
2401 }
2402
2403 ZFCP_LOG_DEBUG("open port request initiated "
2404 "(adapter %s, port 0x%016Lx)\n",
2405 zfcp_get_busid_by_adapter(erp_action->adapter),
2406 erp_action->port->wwpn);
2407 out:
2408 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2409 lock_flags);
2410 return retval;
2411 }
2412
2413 /*
2414 * function: zfcp_fsf_open_port_handler
2415 *
2416 * purpose: is called for finished Open Port command
2417 *
2418 * returns:
2419 */
2420 static int
2421 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2422 {
2423 int retval = -EINVAL;
2424 struct zfcp_port *port;
2425 struct fsf_plogi *plogi;
2426 struct fsf_qtcb_header *header;
2427 u16 subtable, rule, counter;
2428
2429 port = (struct zfcp_port *) fsf_req->data;
2430 header = &fsf_req->qtcb->header;
2431
2432 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2433 /* don't change port status in our bookkeeping */
2434 goto skip_fsfstatus;
2435 }
2436
2437 /* evaluate FSF status in QTCB */
2438 switch (header->fsf_status) {
2439
2440 case FSF_PORT_ALREADY_OPEN:
2441 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2442 "is already open.\n",
2443 port->wwpn, zfcp_get_busid_by_port(port));
2444 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2445 "fsf_s_popen");
2446 /*
2447 * This is a bug, however operation should continue normally
2448 * if it is simply ignored
2449 */
2450 break;
2451
2452 case FSF_ACCESS_DENIED:
2453 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2454 "on adapter %s\n",
2455 port->wwpn, zfcp_get_busid_by_port(port));
2456 for (counter = 0; counter < 2; counter++) {
2457 subtable = header->fsf_status_qual.halfword[counter * 2];
2458 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2459 switch (subtable) {
2460 case FSF_SQ_CFDC_SUBTABLE_OS:
2461 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2462 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2463 case FSF_SQ_CFDC_SUBTABLE_LUN:
2464 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2465 zfcp_act_subtable_type[subtable], rule);
2466 break;
2467 }
2468 }
2469 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2470 zfcp_erp_port_access_denied(port);
2471 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2472 break;
2473
2474 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2475 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2476 "The remote port 0x%016Lx on adapter %s "
2477 "could not be opened. Disabling it.\n",
2478 port->wwpn, zfcp_get_busid_by_port(port));
2479 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2480 "fsf_s_max_ports");
2481 zfcp_erp_port_failed(port);
2482 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2483 break;
2484
2485 case FSF_ADAPTER_STATUS_AVAILABLE:
2486 switch (header->fsf_status_qual.word[0]) {
2487 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2488 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2489 "fsf_sq_ltest");
2490 /* ERP strategy will escalate */
2491 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2492 break;
2493 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2494 /* ERP strategy will escalate */
2495 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2496 "fsf_sq_ulp");
2497 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2498 break;
2499 case FSF_SQ_NO_RETRY_POSSIBLE:
2500 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2501 "adapter %s could not be opened. "
2502 "Disabling it.\n",
2503 port->wwpn,
2504 zfcp_get_busid_by_port(port));
2505 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2506 "fsf_sq_no_retry");
2507 zfcp_erp_port_failed(port);
2508 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2509 break;
2510 default:
2511 ZFCP_LOG_NORMAL
2512 ("bug: Wrong status qualifier 0x%x arrived.\n",
2513 header->fsf_status_qual.word[0]);
2514 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2515 "fsf_sq_inval:");
2516 debug_exception(
2517 fsf_req->adapter->erp_dbf, 0,
2518 &header->fsf_status_qual.word[0],
2519 sizeof (u32));
2520 break;
2521 }
2522 break;
2523
2524 case FSF_GOOD:
2525 /* save port handle assigned by FSF */
2526 port->handle = header->port_handle;
2527 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2528 "was opened, it's port handle is 0x%x\n",
2529 port->wwpn, zfcp_get_busid_by_port(port),
2530 port->handle);
2531 /* mark port as open */
2532 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2533 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2534 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2535 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2536 &port->status);
2537 retval = 0;
2538 /* check whether D_ID has changed during open */
2539 /*
2540 * FIXME: This check is not airtight, as the FCP channel does
2541 * not monitor closures of target port connections caused on
2542 * the remote side. Thus, they might miss out on invalidating
2543 * locally cached WWPNs (and other N_Port parameters) of gone
2544 * target ports. So, our heroic attempt to make things safe
2545 * could be undermined by 'open port' response data tagged with
2546 * obsolete WWPNs. Another reason to monitor potential
2547 * connection closures ourself at least (by interpreting
2548 * incoming ELS' and unsolicited status). It just crosses my
2549 * mind that one should be able to cross-check by means of
2550 * another GID_PN straight after a port has been opened.
2551 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2552 */
2553 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2554 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2555 {
2556 if (fsf_req->qtcb->bottom.support.els1_length <
2557 sizeof (struct fsf_plogi)) {
2558 ZFCP_LOG_INFO(
2559 "warning: insufficient length of "
2560 "PLOGI payload (%i)\n",
2561 fsf_req->qtcb->bottom.support.els1_length);
2562 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2563 "fsf_s_short_plogi:");
2564 /* skip sanity check and assume wwpn is ok */
2565 } else {
2566 if (plogi->serv_param.wwpn != port->wwpn) {
2567 ZFCP_LOG_INFO("warning: d_id of port "
2568 "0x%016Lx changed during "
2569 "open\n", port->wwpn);
2570 debug_text_event(
2571 fsf_req->adapter->erp_dbf, 0,
2572 "fsf_s_did_change:");
2573 atomic_clear_mask(
2574 ZFCP_STATUS_PORT_DID_DID,
2575 &port->status);
2576 } else {
2577 port->wwnn = plogi->serv_param.wwnn;
2578 zfcp_plogi_evaluate(port, plogi);
2579 }
2580 }
2581 }
2582 break;
2583
2584 case FSF_UNKNOWN_OP_SUBTYPE:
2585 /* should never occure, subtype not set in zfcp_fsf_open_port */
2586 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2587 "op_subtype=0x%x)\n",
2588 zfcp_get_busid_by_port(port),
2589 fsf_req->qtcb->bottom.support.operation_subtype);
2590 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2591 break;
2592
2593 default:
2594 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2595 "(debug info 0x%x)\n",
2596 header->fsf_status);
2597 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2598 debug_exception(fsf_req->adapter->erp_dbf, 0,
2599 &header->fsf_status, sizeof (u32));
2600 break;
2601 }
2602
2603 skip_fsfstatus:
2604 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2605 return retval;
2606 }
2607
2608 /*
2609 * function: zfcp_fsf_close_port
2610 *
2611 * purpose: submit FSF command "close port"
2612 *
2613 * returns: address of initiated FSF request
2614 * NULL - request could not be initiated
2615 */
2616 int
2617 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2618 {
2619 volatile struct qdio_buffer_element *sbale;
2620 struct zfcp_fsf_req *fsf_req;
2621 unsigned long lock_flags;
2622 int retval = 0;
2623
2624 /* setup new FSF request */
2625 retval = zfcp_fsf_req_create(erp_action->adapter,
2626 FSF_QTCB_CLOSE_PORT,
2627 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2628 erp_action->adapter->pool.fsf_req_erp,
2629 &lock_flags, &fsf_req);
2630 if (retval < 0) {
2631 ZFCP_LOG_INFO("error: Could not create a close port request "
2632 "for port 0x%016Lx on adapter %s.\n",
2633 erp_action->port->wwpn,
2634 zfcp_get_busid_by_adapter(erp_action->adapter));
2635 goto out;
2636 }
2637
2638 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2639 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2640 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2641
2642 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2643 fsf_req->data = (unsigned long) erp_action->port;
2644 fsf_req->erp_action = erp_action;
2645 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2646 fsf_req->erp_action = erp_action;
2647 erp_action->fsf_req = fsf_req;
2648
2649 zfcp_erp_start_timer(fsf_req);
2650 retval = zfcp_fsf_req_send(fsf_req);
2651 if (retval) {
2652 ZFCP_LOG_INFO("error: Could not send a close port request for "
2653 "port 0x%016Lx on adapter %s.\n",
2654 erp_action->port->wwpn,
2655 zfcp_get_busid_by_adapter(erp_action->adapter));
2656 zfcp_fsf_req_free(fsf_req);
2657 erp_action->fsf_req = NULL;
2658 goto out;
2659 }
2660
2661 ZFCP_LOG_TRACE("close port request initiated "
2662 "(adapter %s, port 0x%016Lx)\n",
2663 zfcp_get_busid_by_adapter(erp_action->adapter),
2664 erp_action->port->wwpn);
2665 out:
2666 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2667 lock_flags);
2668 return retval;
2669 }
2670
2671 /*
2672 * function: zfcp_fsf_close_port_handler
2673 *
2674 * purpose: is called for finished Close Port FSF command
2675 *
2676 * returns:
2677 */
2678 static int
2679 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2680 {
2681 int retval = -EINVAL;
2682 struct zfcp_port *port;
2683
2684 port = (struct zfcp_port *) fsf_req->data;
2685
2686 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2687 /* don't change port status in our bookkeeping */
2688 goto skip_fsfstatus;
2689 }
2690
2691 /* evaluate FSF status in QTCB */
2692 switch (fsf_req->qtcb->header.fsf_status) {
2693
2694 case FSF_PORT_HANDLE_NOT_VALID:
2695 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2696 "0x%016Lx on adapter %s invalid. This may happen "
2697 "occasionally.\n", port->handle,
2698 port->wwpn, zfcp_get_busid_by_port(port));
2699 ZFCP_LOG_DEBUG("status qualifier:\n");
2700 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2701 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2702 sizeof (union fsf_status_qual));
2703 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2704 "fsf_s_phand_nv");
2705 zfcp_erp_adapter_reopen(port->adapter, 0);
2706 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2707 break;
2708
2709 case FSF_ADAPTER_STATUS_AVAILABLE:
2710 /* Note: FSF has actually closed the port in this case.
2711 * The status code is just daft. Fingers crossed for a change
2712 */
2713 retval = 0;
2714 break;
2715
2716 case FSF_GOOD:
2717 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2718 "port handle 0x%x\n", port->wwpn,
2719 zfcp_get_busid_by_port(port), port->handle);
2720 zfcp_erp_modify_port_status(port,
2721 ZFCP_STATUS_COMMON_OPEN,
2722 ZFCP_CLEAR);
2723 retval = 0;
2724 break;
2725
2726 default:
2727 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2728 "(debug info 0x%x)\n",
2729 fsf_req->qtcb->header.fsf_status);
2730 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2731 debug_exception(fsf_req->adapter->erp_dbf, 0,
2732 &fsf_req->qtcb->header.fsf_status,
2733 sizeof (u32));
2734 break;
2735 }
2736
2737 skip_fsfstatus:
2738 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2739 return retval;
2740 }
2741
2742 /*
2743 * function: zfcp_fsf_close_physical_port
2744 *
2745 * purpose: submit FSF command "close physical port"
2746 *
2747 * returns: address of initiated FSF request
2748 * NULL - request could not be initiated
2749 */
2750 int
2751 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2752 {
2753 volatile struct qdio_buffer_element *sbale;
2754 struct zfcp_fsf_req *fsf_req;
2755 unsigned long lock_flags;
2756 int retval = 0;
2757
2758 /* setup new FSF request */
2759 retval = zfcp_fsf_req_create(erp_action->adapter,
2760 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2761 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2762 erp_action->adapter->pool.fsf_req_erp,
2763 &lock_flags, &fsf_req);
2764 if (retval < 0) {
2765 ZFCP_LOG_INFO("error: Could not create close physical port "
2766 "request (adapter %s, port 0x%016Lx)\n",
2767 zfcp_get_busid_by_adapter(erp_action->adapter),
2768 erp_action->port->wwpn);
2769
2770 goto out;
2771 }
2772
2773 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2774 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2775 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2776
2777 /* mark port as being closed */
2778 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2779 &erp_action->port->status);
2780 /* save a pointer to this port */
2781 fsf_req->data = (unsigned long) erp_action->port;
2782 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2783 fsf_req->erp_action = erp_action;
2784 erp_action->fsf_req = fsf_req;
2785
2786 zfcp_erp_start_timer(fsf_req);
2787 retval = zfcp_fsf_req_send(fsf_req);
2788 if (retval) {
2789 ZFCP_LOG_INFO("error: Could not send close physical port "
2790 "request (adapter %s, port 0x%016Lx)\n",
2791 zfcp_get_busid_by_adapter(erp_action->adapter),
2792 erp_action->port->wwpn);
2793 zfcp_fsf_req_free(fsf_req);
2794 erp_action->fsf_req = NULL;
2795 goto out;
2796 }
2797
2798 ZFCP_LOG_TRACE("close physical port request initiated "
2799 "(adapter %s, port 0x%016Lx)\n",
2800 zfcp_get_busid_by_adapter(erp_action->adapter),
2801 erp_action->port->wwpn);
2802 out:
2803 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2804 lock_flags);
2805 return retval;
2806 }
2807
2808 /*
2809 * function: zfcp_fsf_close_physical_port_handler
2810 *
2811 * purpose: is called for finished Close Physical Port FSF command
2812 *
2813 * returns:
2814 */
2815 static int
2816 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2817 {
2818 int retval = -EINVAL;
2819 struct zfcp_port *port;
2820 struct zfcp_unit *unit;
2821 struct fsf_qtcb_header *header;
2822 u16 subtable, rule, counter;
2823
2824 port = (struct zfcp_port *) fsf_req->data;
2825 header = &fsf_req->qtcb->header;
2826
2827 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2828 /* don't change port status in our bookkeeping */
2829 goto skip_fsfstatus;
2830 }
2831
2832 /* evaluate FSF status in QTCB */
2833 switch (header->fsf_status) {
2834
2835 case FSF_PORT_HANDLE_NOT_VALID:
2836 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2837 "(adapter %s, port 0x%016Lx). "
2838 "This may happen occasionally.\n",
2839 port->handle,
2840 zfcp_get_busid_by_port(port),
2841 port->wwpn);
2842 ZFCP_LOG_DEBUG("status qualifier:\n");
2843 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2844 (char *) &header->fsf_status_qual,
2845 sizeof (union fsf_status_qual));
2846 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2847 "fsf_s_phand_nv");
2848 zfcp_erp_adapter_reopen(port->adapter, 0);
2849 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2850 break;
2851
2852 case FSF_ACCESS_DENIED:
2853 ZFCP_LOG_NORMAL("Access denied, cannot close "
2854 "physical port 0x%016Lx on adapter %s\n",
2855 port->wwpn, zfcp_get_busid_by_port(port));
2856 for (counter = 0; counter < 2; counter++) {
2857 subtable = header->fsf_status_qual.halfword[counter * 2];
2858 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2859 switch (subtable) {
2860 case FSF_SQ_CFDC_SUBTABLE_OS:
2861 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2862 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2863 case FSF_SQ_CFDC_SUBTABLE_LUN:
2864 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2865 zfcp_act_subtable_type[subtable], rule);
2866 break;
2867 }
2868 }
2869 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2870 zfcp_erp_port_access_denied(port);
2871 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2872 break;
2873
2874 case FSF_PORT_BOXED:
2875 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2876 "%s needs to be reopened but it was attempted "
2877 "to close it physically.\n",
2878 port->wwpn,
2879 zfcp_get_busid_by_port(port));
2880 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2881 zfcp_erp_port_boxed(port);
2882 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2883 ZFCP_STATUS_FSFREQ_RETRY;
2884 break;
2885
2886 case FSF_ADAPTER_STATUS_AVAILABLE:
2887 switch (header->fsf_status_qual.word[0]) {
2888 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2889 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2890 "fsf_sq_ltest");
2891 /* This will now be escalated by ERP */
2892 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2893 break;
2894 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2895 /* ERP strategy will escalate */
2896 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2897 "fsf_sq_ulp");
2898 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2899 break;
2900 default:
2901 ZFCP_LOG_NORMAL
2902 ("bug: Wrong status qualifier 0x%x arrived.\n",
2903 header->fsf_status_qual.word[0]);
2904 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2905 "fsf_sq_inval:");
2906 debug_exception(
2907 fsf_req->adapter->erp_dbf, 0,
2908 &header->fsf_status_qual.word[0], sizeof (u32));
2909 break;
2910 }
2911 break;
2912
2913 case FSF_GOOD:
2914 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2915 "physically closed, port handle 0x%x\n",
2916 port->wwpn,
2917 zfcp_get_busid_by_port(port), port->handle);
2918 /* can't use generic zfcp_erp_modify_port_status because
2919 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2920 */
2921 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2922 list_for_each_entry(unit, &port->unit_list_head, list)
2923 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2924 retval = 0;
2925 break;
2926
2927 default:
2928 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2929 "(debug info 0x%x)\n",
2930 header->fsf_status);
2931 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2932 debug_exception(fsf_req->adapter->erp_dbf, 0,
2933 &header->fsf_status, sizeof (u32));
2934 break;
2935 }
2936
2937 skip_fsfstatus:
2938 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2939 return retval;
2940 }
2941
2942 /*
2943 * function: zfcp_fsf_open_unit
2944 *
2945 * purpose:
2946 *
2947 * returns:
2948 *
2949 * assumptions: This routine does not check whether the associated
2950 * remote port has already been opened. This should be
2951 * done by calling routines. Otherwise some status
2952 * may be presented by FSF
2953 */
2954 int
2955 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2956 {
2957 volatile struct qdio_buffer_element *sbale;
2958 struct zfcp_fsf_req *fsf_req;
2959 unsigned long lock_flags;
2960 int retval = 0;
2961
2962 /* setup new FSF request */
2963 retval = zfcp_fsf_req_create(erp_action->adapter,
2964 FSF_QTCB_OPEN_LUN,
2965 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2966 erp_action->adapter->pool.fsf_req_erp,
2967 &lock_flags, &fsf_req);
2968 if (retval < 0) {
2969 ZFCP_LOG_INFO("error: Could not create open unit request for "
2970 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2971 erp_action->unit->fcp_lun,
2972 erp_action->unit->port->wwpn,
2973 zfcp_get_busid_by_adapter(erp_action->adapter));
2974 goto out;
2975 }
2976
2977 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2978 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2979 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2980
2981 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2982 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
2983 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2984 fsf_req->qtcb->bottom.support.option =
2985 FSF_OPEN_LUN_SUPPRESS_BOXING;
2986 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2987 fsf_req->data = (unsigned long) erp_action->unit;
2988 fsf_req->erp_action = erp_action;
2989 erp_action->fsf_req = fsf_req;
2990
2991 zfcp_erp_start_timer(fsf_req);
2992 retval = zfcp_fsf_req_send(erp_action->fsf_req);
2993 if (retval) {
2994 ZFCP_LOG_INFO("error: Could not send an open unit request "
2995 "on the adapter %s, port 0x%016Lx for "
2996 "unit 0x%016Lx\n",
2997 zfcp_get_busid_by_adapter(erp_action->adapter),
2998 erp_action->port->wwpn,
2999 erp_action->unit->fcp_lun);
3000 zfcp_fsf_req_free(fsf_req);
3001 erp_action->fsf_req = NULL;
3002 goto out;
3003 }
3004
3005 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3006 "port 0x%016Lx, unit 0x%016Lx)\n",
3007 zfcp_get_busid_by_adapter(erp_action->adapter),
3008 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3009 out:
3010 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3011 lock_flags);
3012 return retval;
3013 }
3014
3015 /*
3016 * function: zfcp_fsf_open_unit_handler
3017 *
3018 * purpose: is called for finished Open LUN command
3019 *
3020 * returns:
3021 */
3022 static int
3023 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3024 {
3025 int retval = -EINVAL;
3026 struct zfcp_adapter *adapter;
3027 struct zfcp_unit *unit;
3028 struct fsf_qtcb_header *header;
3029 struct fsf_qtcb_bottom_support *bottom;
3030 struct fsf_queue_designator *queue_designator;
3031 u16 subtable, rule, counter;
3032 int exclusive, readwrite;
3033
3034 unit = (struct zfcp_unit *) fsf_req->data;
3035
3036 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3037 /* don't change unit status in our bookkeeping */
3038 goto skip_fsfstatus;
3039 }
3040
3041 adapter = fsf_req->adapter;
3042 header = &fsf_req->qtcb->header;
3043 bottom = &fsf_req->qtcb->bottom.support;
3044 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3045
3046 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3047 ZFCP_STATUS_UNIT_SHARED |
3048 ZFCP_STATUS_UNIT_READONLY,
3049 &unit->status);
3050
3051 /* evaluate FSF status in QTCB */
3052 switch (header->fsf_status) {
3053
3054 case FSF_PORT_HANDLE_NOT_VALID:
3055 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3056 "for port 0x%016Lx on adapter %s invalid "
3057 "This may happen occasionally\n",
3058 unit->port->handle,
3059 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3060 ZFCP_LOG_DEBUG("status qualifier:\n");
3061 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3062 (char *) &header->fsf_status_qual,
3063 sizeof (union fsf_status_qual));
3064 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3065 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3066 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3067 break;
3068
3069 case FSF_LUN_ALREADY_OPEN:
3070 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3071 "remote port 0x%016Lx on adapter %s twice.\n",
3072 unit->fcp_lun,
3073 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3074 debug_text_exception(adapter->erp_dbf, 0,
3075 "fsf_s_uopen");
3076 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3077 break;
3078
3079 case FSF_ACCESS_DENIED:
3080 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3081 "remote port 0x%016Lx on adapter %s\n",
3082 unit->fcp_lun, unit->port->wwpn,
3083 zfcp_get_busid_by_unit(unit));
3084 for (counter = 0; counter < 2; counter++) {
3085 subtable = header->fsf_status_qual.halfword[counter * 2];
3086 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3087 switch (subtable) {
3088 case FSF_SQ_CFDC_SUBTABLE_OS:
3089 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3090 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3091 case FSF_SQ_CFDC_SUBTABLE_LUN:
3092 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3093 zfcp_act_subtable_type[subtable], rule);
3094 break;
3095 }
3096 }
3097 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3098 zfcp_erp_unit_access_denied(unit);
3099 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3100 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3101 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3102 break;
3103
3104 case FSF_PORT_BOXED:
3105 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3106 "needs to be reopened\n",
3107 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3108 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3109 zfcp_erp_port_boxed(unit->port);
3110 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3111 ZFCP_STATUS_FSFREQ_RETRY;
3112 break;
3113
3114 case FSF_LUN_SHARING_VIOLATION:
3115 if (header->fsf_status_qual.word[0] != 0) {
3116 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3117 "with WWPN 0x%Lx "
3118 "connected to the adapter %s "
3119 "is already in use in LPAR%d, CSS%d\n",
3120 unit->fcp_lun,
3121 unit->port->wwpn,
3122 zfcp_get_busid_by_unit(unit),
3123 queue_designator->hla,
3124 queue_designator->cssid);
3125 } else {
3126 subtable = header->fsf_status_qual.halfword[4];
3127 rule = header->fsf_status_qual.halfword[5];
3128 switch (subtable) {
3129 case FSF_SQ_CFDC_SUBTABLE_OS:
3130 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3131 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3132 case FSF_SQ_CFDC_SUBTABLE_LUN:
3133 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3134 "remote port with WWPN 0x%Lx "
3135 "connected to the adapter %s "
3136 "is denied (%s rule %d)\n",
3137 unit->fcp_lun,
3138 unit->port->wwpn,
3139 zfcp_get_busid_by_unit(unit),
3140 zfcp_act_subtable_type[subtable],
3141 rule);
3142 break;
3143 }
3144 }
3145 ZFCP_LOG_DEBUG("status qualifier:\n");
3146 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3147 (char *) &header->fsf_status_qual,
3148 sizeof (union fsf_status_qual));
3149 debug_text_event(adapter->erp_dbf, 2,
3150 "fsf_s_l_sh_vio");
3151 zfcp_erp_unit_access_denied(unit);
3152 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3153 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3154 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3155 break;
3156
3157 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3158 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3159 "There is no handle (temporary port identifier) "
3160 "available for unit 0x%016Lx on port 0x%016Lx "
3161 "on adapter %s\n",
3162 unit->fcp_lun,
3163 unit->port->wwpn,
3164 zfcp_get_busid_by_unit(unit));
3165 debug_text_event(adapter->erp_dbf, 1,
3166 "fsf_s_max_units");
3167 zfcp_erp_unit_failed(unit);
3168 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3169 break;
3170
3171 case FSF_ADAPTER_STATUS_AVAILABLE:
3172 switch (header->fsf_status_qual.word[0]) {
3173 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3174 /* Re-establish link to port */
3175 debug_text_event(adapter->erp_dbf, 1,
3176 "fsf_sq_ltest");
3177 zfcp_test_link(unit->port);
3178 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3179 break;
3180 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3181 /* ERP strategy will escalate */
3182 debug_text_event(adapter->erp_dbf, 1,
3183 "fsf_sq_ulp");
3184 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3185 break;
3186 default:
3187 ZFCP_LOG_NORMAL
3188 ("bug: Wrong status qualifier 0x%x arrived.\n",
3189 header->fsf_status_qual.word[0]);
3190 debug_text_event(adapter->erp_dbf, 0,
3191 "fsf_sq_inval:");
3192 debug_exception(adapter->erp_dbf, 0,
3193 &header->fsf_status_qual.word[0],
3194 sizeof (u32));
3195 }
3196 break;
3197
3198 case FSF_INVALID_COMMAND_OPTION:
3199 ZFCP_LOG_NORMAL(
3200 "Invalid option 0x%x has been specified "
3201 "in QTCB bottom sent to the adapter %s\n",
3202 bottom->option,
3203 zfcp_get_busid_by_adapter(adapter));
3204 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3205 retval = -EINVAL;
3206 break;
3207
3208 case FSF_GOOD:
3209 /* save LUN handle assigned by FSF */
3210 unit->handle = header->lun_handle;
3211 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3212 "adapter %s opened, port handle 0x%x\n",
3213 unit->fcp_lun,
3214 unit->port->wwpn,
3215 zfcp_get_busid_by_unit(unit),
3216 unit->handle);
3217 /* mark unit as open */
3218 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3219
3220 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3221 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3222 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3223 exclusive = (bottom->lun_access_info &
3224 FSF_UNIT_ACCESS_EXCLUSIVE);
3225 readwrite = (bottom->lun_access_info &
3226 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3227
3228 if (!exclusive)
3229 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3230 &unit->status);
3231
3232 if (!readwrite) {
3233 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3234 &unit->status);
3235 ZFCP_LOG_NORMAL("read-only access for unit "
3236 "(adapter %s, wwpn=0x%016Lx, "
3237 "fcp_lun=0x%016Lx)\n",
3238 zfcp_get_busid_by_unit(unit),
3239 unit->port->wwpn,
3240 unit->fcp_lun);
3241 }
3242
3243 if (exclusive && !readwrite) {
3244 ZFCP_LOG_NORMAL("exclusive access of read-only "
3245 "unit not supported\n");
3246 zfcp_erp_unit_failed(unit);
3247 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3248 zfcp_erp_unit_shutdown(unit, 0);
3249 } else if (!exclusive && readwrite) {
3250 ZFCP_LOG_NORMAL("shared access of read-write "
3251 "unit not supported\n");
3252 zfcp_erp_unit_failed(unit);
3253 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3254 zfcp_erp_unit_shutdown(unit, 0);
3255 }
3256 }
3257
3258 retval = 0;
3259 break;
3260
3261 default:
3262 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3263 "(debug info 0x%x)\n",
3264 header->fsf_status);
3265 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3266 debug_exception(adapter->erp_dbf, 0,
3267 &header->fsf_status, sizeof (u32));
3268 break;
3269 }
3270
3271 skip_fsfstatus:
3272 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3273 return retval;
3274 }
3275
3276 /*
3277 * function: zfcp_fsf_close_unit
3278 *
3279 * purpose:
3280 *
3281 * returns: address of fsf_req - request successfully initiated
3282 * NULL -
3283 *
3284 * assumptions: This routine does not check whether the associated
3285 * remote port/lun has already been opened. This should be
3286 * done by calling routines. Otherwise some status
3287 * may be presented by FSF
3288 */
3289 int
3290 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3291 {
3292 volatile struct qdio_buffer_element *sbale;
3293 struct zfcp_fsf_req *fsf_req;
3294 unsigned long lock_flags;
3295 int retval = 0;
3296
3297 /* setup new FSF request */
3298 retval = zfcp_fsf_req_create(erp_action->adapter,
3299 FSF_QTCB_CLOSE_LUN,
3300 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3301 erp_action->adapter->pool.fsf_req_erp,
3302 &lock_flags, &fsf_req);
3303 if (retval < 0) {
3304 ZFCP_LOG_INFO("error: Could not create close unit request for "
3305 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3306 erp_action->unit->fcp_lun,
3307 erp_action->port->wwpn,
3308 zfcp_get_busid_by_adapter(erp_action->adapter));
3309 goto out;
3310 }
3311
3312 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3313 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3314 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3315
3316 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3317 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3318 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3319 fsf_req->data = (unsigned long) erp_action->unit;
3320 fsf_req->erp_action = erp_action;
3321 erp_action->fsf_req = fsf_req;
3322
3323 zfcp_erp_start_timer(fsf_req);
3324 retval = zfcp_fsf_req_send(erp_action->fsf_req);
3325 if (retval) {
3326 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3327 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3328 erp_action->unit->fcp_lun,
3329 erp_action->port->wwpn,
3330 zfcp_get_busid_by_adapter(erp_action->adapter));
3331 zfcp_fsf_req_free(fsf_req);
3332 erp_action->fsf_req = NULL;
3333 goto out;
3334 }
3335
3336 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3337 "port 0x%016Lx, unit 0x%016Lx)\n",
3338 zfcp_get_busid_by_adapter(erp_action->adapter),
3339 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3340 out:
3341 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3342 lock_flags);
3343 return retval;
3344 }
3345
3346 /*
3347 * function: zfcp_fsf_close_unit_handler
3348 *
3349 * purpose: is called for finished Close LUN FSF command
3350 *
3351 * returns:
3352 */
3353 static int
3354 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3355 {
3356 int retval = -EINVAL;
3357 struct zfcp_unit *unit;
3358
3359 unit = (struct zfcp_unit *) fsf_req->data;
3360
3361 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3362 /* don't change unit status in our bookkeeping */
3363 goto skip_fsfstatus;
3364 }
3365
3366 /* evaluate FSF status in QTCB */
3367 switch (fsf_req->qtcb->header.fsf_status) {
3368
3369 case FSF_PORT_HANDLE_NOT_VALID:
3370 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3371 "0x%016Lx on adapter %s invalid. This may "
3372 "happen in rare circumstances\n",
3373 unit->port->handle,
3374 unit->port->wwpn,
3375 zfcp_get_busid_by_unit(unit));
3376 ZFCP_LOG_DEBUG("status qualifier:\n");
3377 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3378 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3379 sizeof (union fsf_status_qual));
3380 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3381 "fsf_s_phand_nv");
3382 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3383 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3384 break;
3385
3386 case FSF_LUN_HANDLE_NOT_VALID:
3387 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3388 "0x%016Lx on port 0x%016Lx on adapter %s is "
3389 "invalid. This may happen occasionally.\n",
3390 unit->handle,
3391 unit->fcp_lun,
3392 unit->port->wwpn,
3393 zfcp_get_busid_by_unit(unit));
3394 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3395 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3396 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3397 sizeof (union fsf_status_qual));
3398 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3399 "fsf_s_lhand_nv");
3400 zfcp_erp_port_reopen(unit->port, 0);
3401 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3402 break;
3403
3404 case FSF_PORT_BOXED:
3405 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3406 "needs to be reopened\n",
3407 unit->port->wwpn,
3408 zfcp_get_busid_by_unit(unit));
3409 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3410 zfcp_erp_port_boxed(unit->port);
3411 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3412 ZFCP_STATUS_FSFREQ_RETRY;
3413 break;
3414
3415 case FSF_ADAPTER_STATUS_AVAILABLE:
3416 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3417 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3418 /* re-establish link to port */
3419 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3420 "fsf_sq_ltest");
3421 zfcp_test_link(unit->port);
3422 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3423 break;
3424 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3425 /* ERP strategy will escalate */
3426 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3427 "fsf_sq_ulp");
3428 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3429 break;
3430 default:
3431 ZFCP_LOG_NORMAL
3432 ("bug: Wrong status qualifier 0x%x arrived.\n",
3433 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3434 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3435 "fsf_sq_inval:");
3436 debug_exception(
3437 fsf_req->adapter->erp_dbf, 0,
3438 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3439 sizeof (u32));
3440 break;
3441 }
3442 break;
3443
3444 case FSF_GOOD:
3445 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3446 "closed, port handle 0x%x\n",
3447 unit->fcp_lun,
3448 unit->port->wwpn,
3449 zfcp_get_busid_by_unit(unit),
3450 unit->handle);
3451 /* mark unit as closed */
3452 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3453 retval = 0;
3454 break;
3455
3456 default:
3457 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3458 "(debug info 0x%x)\n",
3459 fsf_req->qtcb->header.fsf_status);
3460 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3461 debug_exception(fsf_req->adapter->erp_dbf, 0,
3462 &fsf_req->qtcb->header.fsf_status,
3463 sizeof (u32));
3464 break;
3465 }
3466
3467 skip_fsfstatus:
3468 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3469 return retval;
3470 }
3471
3472 /**
3473 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3474 * @adapter: adapter where scsi command is issued
3475 * @unit: unit where command is sent to
3476 * @scsi_cmnd: scsi command to be sent
3477 * @timer: timer to be started when request is initiated
3478 * @req_flags: flags for fsf_request
3479 */
3480 int
3481 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3482 struct zfcp_unit *unit,
3483 struct scsi_cmnd * scsi_cmnd,
3484 int use_timer, int req_flags)
3485 {
3486 struct zfcp_fsf_req *fsf_req = NULL;
3487 struct fcp_cmnd_iu *fcp_cmnd_iu;
3488 unsigned int sbtype;
3489 unsigned long lock_flags;
3490 int real_bytes = 0;
3491 int retval = 0;
3492 int mask;
3493
3494 /* setup new FSF request */
3495 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3496 adapter->pool.fsf_req_scsi,
3497 &lock_flags, &fsf_req);
3498 if (unlikely(retval < 0)) {
3499 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3500 "for unit 0x%016Lx on port 0x%016Lx on "
3501 "adapter %s\n",
3502 unit->fcp_lun,
3503 unit->port->wwpn,
3504 zfcp_get_busid_by_adapter(adapter));
3505 goto failed_req_create;
3506 }
3507
3508 zfcp_unit_get(unit);
3509 fsf_req->unit = unit;
3510
3511 /* associate FSF request with SCSI request (for look up on abort) */
3512 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
3513
3514 /* associate SCSI command with FSF request */
3515 fsf_req->data = (unsigned long) scsi_cmnd;
3516
3517 /* set handles of unit and its parent port in QTCB */
3518 fsf_req->qtcb->header.lun_handle = unit->handle;
3519 fsf_req->qtcb->header.port_handle = unit->port->handle;
3520
3521 /* FSF does not define the structure of the FCP_CMND IU */
3522 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3523 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3524
3525 /*
3526 * set depending on data direction:
3527 * data direction bits in SBALE (SB Type)
3528 * data direction bits in QTCB
3529 * data direction bits in FCP_CMND IU
3530 */
3531 switch (scsi_cmnd->sc_data_direction) {
3532 case DMA_NONE:
3533 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3534 /*
3535 * FIXME(qdio):
3536 * what is the correct type for commands
3537 * without 'real' data buffers?
3538 */
3539 sbtype = SBAL_FLAGS0_TYPE_READ;
3540 break;
3541 case DMA_FROM_DEVICE:
3542 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3543 sbtype = SBAL_FLAGS0_TYPE_READ;
3544 fcp_cmnd_iu->rddata = 1;
3545 break;
3546 case DMA_TO_DEVICE:
3547 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3548 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3549 fcp_cmnd_iu->wddata = 1;
3550 break;
3551 case DMA_BIDIRECTIONAL:
3552 default:
3553 /*
3554 * dummy, catch this condition earlier
3555 * in zfcp_scsi_queuecommand
3556 */
3557 goto failed_scsi_cmnd;
3558 }
3559
3560 /* set FC service class in QTCB (3 per default) */
3561 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
3562
3563 /* set FCP_LUN in FCP_CMND IU in QTCB */
3564 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3565
3566 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3567
3568 /* set task attributes in FCP_CMND IU in QTCB */
3569 if (likely((scsi_cmnd->device->simple_tags) ||
3570 (atomic_test_mask(mask, &unit->status))))
3571 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3572 else
3573 fcp_cmnd_iu->task_attribute = UNTAGGED;
3574
3575 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3576 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3577 fcp_cmnd_iu->add_fcp_cdb_length
3578 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3579 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3580 "additional FCP_CDB length is 0x%x "
3581 "(shifted right 2 bits)\n",
3582 scsi_cmnd->cmd_len,
3583 fcp_cmnd_iu->add_fcp_cdb_length);
3584 }
3585 /*
3586 * copy SCSI CDB (including additional length, if any) to
3587 * FCP_CDB in FCP_CMND IU in QTCB
3588 */
3589 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3590
3591 /* FCP CMND IU length in QTCB */
3592 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3593 sizeof (struct fcp_cmnd_iu) +
3594 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3595
3596 /* generate SBALEs from data buffer */
3597 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3598 if (unlikely(real_bytes < 0)) {
3599 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3600 ZFCP_LOG_DEBUG(
3601 "Data did not fit into available buffer(s), "
3602 "waiting for more...\n");
3603 retval = -EIO;
3604 } else {
3605 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3606 "required. Shutting down unit "
3607 "(adapter %s, port 0x%016Lx, "
3608 "unit 0x%016Lx)\n",
3609 zfcp_get_busid_by_unit(unit),
3610 unit->port->wwpn,
3611 unit->fcp_lun);
3612 zfcp_erp_unit_shutdown(unit, 0);
3613 retval = -EINVAL;
3614 }
3615 goto no_fit;
3616 }
3617
3618 /* set length of FCP data length in FCP_CMND IU in QTCB */
3619 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3620
3621 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3622 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3623 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3624
3625 if (use_timer)
3626 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3627
3628 retval = zfcp_fsf_req_send(fsf_req);
3629 if (unlikely(retval < 0)) {
3630 ZFCP_LOG_INFO("error: Could not send FCP command request "
3631 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3632 zfcp_get_busid_by_adapter(adapter),
3633 unit->port->wwpn,
3634 unit->fcp_lun);
3635 goto send_failed;
3636 }
3637
3638 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3639 "port 0x%016Lx, unit 0x%016Lx)\n",
3640 zfcp_get_busid_by_adapter(adapter),
3641 unit->port->wwpn,
3642 unit->fcp_lun);
3643 goto success;
3644
3645 send_failed:
3646 no_fit:
3647 failed_scsi_cmnd:
3648 zfcp_unit_put(unit);
3649 zfcp_fsf_req_free(fsf_req);
3650 fsf_req = NULL;
3651 scsi_cmnd->host_scribble = NULL;
3652 success:
3653 failed_req_create:
3654 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3655 return retval;
3656 }
3657
3658 struct zfcp_fsf_req *
3659 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3660 struct zfcp_unit *unit,
3661 u8 tm_flags, int req_flags)
3662 {
3663 struct zfcp_fsf_req *fsf_req = NULL;
3664 int retval = 0;
3665 struct fcp_cmnd_iu *fcp_cmnd_iu;
3666 unsigned long lock_flags;
3667 volatile struct qdio_buffer_element *sbale;
3668
3669 /* setup new FSF request */
3670 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3671 adapter->pool.fsf_req_scsi,
3672 &lock_flags, &fsf_req);
3673 if (retval < 0) {
3674 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3675 "management) request for adapter %s, port "
3676 " 0x%016Lx, unit 0x%016Lx.\n",
3677 zfcp_get_busid_by_adapter(adapter),
3678 unit->port->wwpn, unit->fcp_lun);
3679 goto out;
3680 }
3681
3682 /*
3683 * Used to decide on proper handler in the return path,
3684 * could be either zfcp_fsf_send_fcp_command_task_handler or
3685 * zfcp_fsf_send_fcp_command_task_management_handler */
3686
3687 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3688
3689 /*
3690 * hold a pointer to the unit being target of this
3691 * task management request
3692 */
3693 fsf_req->data = (unsigned long) unit;
3694
3695 /* set FSF related fields in QTCB */
3696 fsf_req->qtcb->header.lun_handle = unit->handle;
3697 fsf_req->qtcb->header.port_handle = unit->port->handle;
3698 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3699 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
3700 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3701 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3702
3703 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3704 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3705 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3706
3707 /* set FCP related fields in FCP_CMND IU in QTCB */
3708 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3709 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3710 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3711 fcp_cmnd_iu->task_management_flags = tm_flags;
3712
3713 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
3714 retval = zfcp_fsf_req_send(fsf_req);
3715 if (retval) {
3716 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3717 "management) on adapter %s, port 0x%016Lx for "
3718 "unit LUN 0x%016Lx\n",
3719 zfcp_get_busid_by_adapter(adapter),
3720 unit->port->wwpn,
3721 unit->fcp_lun);
3722 zfcp_fsf_req_free(fsf_req);
3723 fsf_req = NULL;
3724 goto out;
3725 }
3726
3727 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3728 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3729 "tm_flags=0x%x)\n",
3730 zfcp_get_busid_by_adapter(adapter),
3731 unit->port->wwpn,
3732 unit->fcp_lun,
3733 tm_flags);
3734 out:
3735 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3736 return fsf_req;
3737 }
3738
3739 /*
3740 * function: zfcp_fsf_send_fcp_command_handler
3741 *
3742 * purpose: is called for finished Send FCP Command
3743 *
3744 * returns:
3745 */
3746 static int
3747 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3748 {
3749 int retval = -EINVAL;
3750 struct zfcp_unit *unit;
3751 struct fsf_qtcb_header *header;
3752 u16 subtable, rule, counter;
3753
3754 header = &fsf_req->qtcb->header;
3755
3756 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3757 unit = (struct zfcp_unit *) fsf_req->data;
3758 else
3759 unit = fsf_req->unit;
3760
3761 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3762 /* go directly to calls of special handlers */
3763 goto skip_fsfstatus;
3764 }
3765
3766 /* evaluate FSF status in QTCB */
3767 switch (header->fsf_status) {
3768
3769 case FSF_PORT_HANDLE_NOT_VALID:
3770 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3771 "0x%016Lx on adapter %s invalid\n",
3772 unit->port->handle,
3773 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3774 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3775 (char *) &header->fsf_status_qual,
3776 sizeof (union fsf_status_qual));
3777 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3778 "fsf_s_phand_nv");
3779 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3780 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3781 break;
3782
3783 case FSF_LUN_HANDLE_NOT_VALID:
3784 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3785 "0x%016Lx on port 0x%016Lx on adapter %s is "
3786 "invalid. This may happen occasionally.\n",
3787 unit->handle,
3788 unit->fcp_lun,
3789 unit->port->wwpn,
3790 zfcp_get_busid_by_unit(unit));
3791 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3792 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3793 (char *) &header->fsf_status_qual,
3794 sizeof (union fsf_status_qual));
3795 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3796 "fsf_s_uhand_nv");
3797 zfcp_erp_port_reopen(unit->port, 0);
3798 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3799 break;
3800
3801 case FSF_HANDLE_MISMATCH:
3802 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3803 "unexpectedly. (adapter %s, port 0x%016Lx, "
3804 "unit 0x%016Lx)\n",
3805 unit->port->handle,
3806 zfcp_get_busid_by_unit(unit),
3807 unit->port->wwpn,
3808 unit->fcp_lun);
3809 ZFCP_LOG_NORMAL("status qualifier:\n");
3810 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3811 (char *) &header->fsf_status_qual,
3812 sizeof (union fsf_status_qual));
3813 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3814 "fsf_s_hand_mis");
3815 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3816 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3817 break;
3818
3819 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3820 ZFCP_LOG_INFO("error: adapter %s does not support fc "
3821 "class %d.\n",
3822 zfcp_get_busid_by_unit(unit),
3823 ZFCP_FC_SERVICE_CLASS_DEFAULT);
3824 /* stop operation for this adapter */
3825 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3826 "fsf_s_class_nsup");
3827 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3828 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3829 break;
3830
3831 case FSF_FCPLUN_NOT_VALID:
3832 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3833 "adapter %s does not have correct unit "
3834 "handle 0x%x\n",
3835 unit->fcp_lun,
3836 unit->port->wwpn,
3837 zfcp_get_busid_by_unit(unit),
3838 unit->handle);
3839 ZFCP_LOG_DEBUG("status qualifier:\n");
3840 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3841 (char *) &header->fsf_status_qual,
3842 sizeof (union fsf_status_qual));
3843 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3844 "fsf_s_fcp_lun_nv");
3845 zfcp_erp_port_reopen(unit->port, 0);
3846 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3847 break;
3848
3849 case FSF_ACCESS_DENIED:
3850 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3851 "unit 0x%016Lx on port 0x%016Lx on "
3852 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3853 zfcp_get_busid_by_unit(unit));
3854 for (counter = 0; counter < 2; counter++) {
3855 subtable = header->fsf_status_qual.halfword[counter * 2];
3856 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3857 switch (subtable) {
3858 case FSF_SQ_CFDC_SUBTABLE_OS:
3859 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3860 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3861 case FSF_SQ_CFDC_SUBTABLE_LUN:
3862 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3863 zfcp_act_subtable_type[subtable], rule);
3864 break;
3865 }
3866 }
3867 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3868 zfcp_erp_unit_access_denied(unit);
3869 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3870 break;
3871
3872 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3873 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3874 "0x%016Lx on port 0x%016Lx on adapter %s "
3875 "(debug info %d)\n",
3876 unit->fcp_lun,
3877 unit->port->wwpn,
3878 zfcp_get_busid_by_unit(unit),
3879 fsf_req->qtcb->bottom.io.data_direction);
3880 /* stop operation for this adapter */
3881 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3882 "fsf_s_dir_ind_nv");
3883 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3884 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3885 break;
3886
3887 case FSF_CMND_LENGTH_NOT_VALID:
3888 ZFCP_LOG_NORMAL
3889 ("bug: An invalid control-data-block length field "
3890 "was found in a command for unit 0x%016Lx on port "
3891 "0x%016Lx on adapter %s " "(debug info %d)\n",
3892 unit->fcp_lun, unit->port->wwpn,
3893 zfcp_get_busid_by_unit(unit),
3894 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3895 /* stop operation for this adapter */
3896 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3897 "fsf_s_cmd_len_nv");
3898 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3899 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3900 break;
3901
3902 case FSF_PORT_BOXED:
3903 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3904 "needs to be reopened\n",
3905 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3906 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3907 zfcp_erp_port_boxed(unit->port);
3908 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3909 ZFCP_STATUS_FSFREQ_RETRY;
3910 break;
3911
3912 case FSF_LUN_BOXED:
3913 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3914 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3915 zfcp_get_busid_by_unit(unit),
3916 unit->port->wwpn, unit->fcp_lun);
3917 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
3918 zfcp_erp_unit_boxed(unit);
3919 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3920 | ZFCP_STATUS_FSFREQ_RETRY;
3921 break;
3922
3923 case FSF_ADAPTER_STATUS_AVAILABLE:
3924 switch (header->fsf_status_qual.word[0]) {
3925 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3926 /* re-establish link to port */
3927 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3928 "fsf_sq_ltest");
3929 zfcp_test_link(unit->port);
3930 break;
3931 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3932 /* FIXME(hw) need proper specs for proper action */
3933 /* let scsi stack deal with retries and escalation */
3934 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3935 "fsf_sq_ulp");
3936 break;
3937 default:
3938 ZFCP_LOG_NORMAL
3939 ("Unknown status qualifier 0x%x arrived.\n",
3940 header->fsf_status_qual.word[0]);
3941 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3942 "fsf_sq_inval:");
3943 debug_exception(fsf_req->adapter->erp_dbf, 0,
3944 &header->fsf_status_qual.word[0],
3945 sizeof(u32));
3946 break;
3947 }
3948 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3949 break;
3950
3951 case FSF_GOOD:
3952 break;
3953
3954 case FSF_FCP_RSP_AVAILABLE:
3955 break;
3956
3957 default:
3958 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3959 debug_exception(fsf_req->adapter->erp_dbf, 0,
3960 &header->fsf_status, sizeof(u32));
3961 break;
3962 }
3963
3964 skip_fsfstatus:
3965 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3966 retval =
3967 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3968 } else {
3969 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
3970 fsf_req->unit = NULL;
3971 zfcp_unit_put(unit);
3972 }
3973 return retval;
3974 }
3975
3976 /*
3977 * function: zfcp_fsf_send_fcp_command_task_handler
3978 *
3979 * purpose: evaluates FCP_RSP IU
3980 *
3981 * returns:
3982 */
3983 static int
3984 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3985 {
3986 int retval = 0;
3987 struct scsi_cmnd *scpnt;
3988 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3989 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3990 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3991 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3992 u32 sns_len;
3993 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3994 unsigned long flags;
3995 struct zfcp_unit *unit = fsf_req->unit;
3996
3997 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
3998 scpnt = (struct scsi_cmnd *) fsf_req->data;
3999 if (unlikely(!scpnt)) {
4000 ZFCP_LOG_DEBUG
4001 ("Command with fsf_req %p is not associated to "
4002 "a scsi command anymore. Aborted?\n", fsf_req);
4003 goto out;
4004 }
4005 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4006 /* FIXME: (design) mid-layer should handle DID_ABORT like
4007 * DID_SOFT_ERROR by retrying the request for devices
4008 * that allow retries.
4009 */
4010 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4011 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4012 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4013 goto skip_fsfstatus;
4014 }
4015
4016 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4017 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4018 set_host_byte(&scpnt->result, DID_ERROR);
4019 goto skip_fsfstatus;
4020 }
4021
4022 /* set message byte of result in SCSI command */
4023 scpnt->result |= COMMAND_COMPLETE << 8;
4024
4025 /*
4026 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4027 * of result in SCSI command
4028 */
4029 scpnt->result |= fcp_rsp_iu->scsi_status;
4030 if (unlikely(fcp_rsp_iu->scsi_status)) {
4031 /* DEBUG */
4032 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4033 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4034 scpnt->cmnd, scpnt->cmd_len);
4035 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4036 fcp_rsp_iu->scsi_status);
4037 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4038 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4039 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4040 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4041 fcp_rsp_iu->fcp_sns_len);
4042 }
4043
4044 /* check FCP_RSP_INFO */
4045 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4046 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4047 switch (fcp_rsp_info[3]) {
4048 case RSP_CODE_GOOD:
4049 /* ok, continue */
4050 ZFCP_LOG_TRACE("no failure or Task Management "
4051 "Function complete\n");
4052 set_host_byte(&scpnt->result, DID_OK);
4053 break;
4054 case RSP_CODE_LENGTH_MISMATCH:
4055 /* hardware bug */
4056 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4057 "that the fibrechannel protocol data "
4058 "length differs from the burst length. "
4059 "The problem occured on unit 0x%016Lx "
4060 "on port 0x%016Lx on adapter %s",
4061 unit->fcp_lun,
4062 unit->port->wwpn,
4063 zfcp_get_busid_by_unit(unit));
4064 /* dump SCSI CDB as prepared by zfcp */
4065 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4066 (char *) &fsf_req->qtcb->
4067 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4068 set_host_byte(&scpnt->result, DID_ERROR);
4069 goto skip_fsfstatus;
4070 case RSP_CODE_FIELD_INVALID:
4071 /* driver or hardware bug */
4072 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4073 "that the fibrechannel protocol data "
4074 "fields were incorrectly set up. "
4075 "The problem occured on the unit "
4076 "0x%016Lx on port 0x%016Lx on "
4077 "adapter %s",
4078 unit->fcp_lun,
4079 unit->port->wwpn,
4080 zfcp_get_busid_by_unit(unit));
4081 /* dump SCSI CDB as prepared by zfcp */
4082 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4083 (char *) &fsf_req->qtcb->
4084 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4085 set_host_byte(&scpnt->result, DID_ERROR);
4086 goto skip_fsfstatus;
4087 case RSP_CODE_RO_MISMATCH:
4088 /* hardware bug */
4089 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4090 "that conflicting values for the "
4091 "fibrechannel payload offset from the "
4092 "header were found. "
4093 "The problem occured on unit 0x%016Lx "
4094 "on port 0x%016Lx on adapter %s.\n",
4095 unit->fcp_lun,
4096 unit->port->wwpn,
4097 zfcp_get_busid_by_unit(unit));
4098 /* dump SCSI CDB as prepared by zfcp */
4099 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4100 (char *) &fsf_req->qtcb->
4101 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4102 set_host_byte(&scpnt->result, DID_ERROR);
4103 goto skip_fsfstatus;
4104 default:
4105 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4106 "code was detected for a command. "
4107 "The problem occured on the unit "
4108 "0x%016Lx on port 0x%016Lx on "
4109 "adapter %s (debug info 0x%x)\n",
4110 unit->fcp_lun,
4111 unit->port->wwpn,
4112 zfcp_get_busid_by_unit(unit),
4113 fcp_rsp_info[3]);
4114 /* dump SCSI CDB as prepared by zfcp */
4115 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4116 (char *) &fsf_req->qtcb->
4117 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4118 set_host_byte(&scpnt->result, DID_ERROR);
4119 goto skip_fsfstatus;
4120 }
4121 }
4122
4123 /* check for sense data */
4124 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4125 sns_len = FSF_FCP_RSP_SIZE -
4126 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4127 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4128 sns_len);
4129 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4130 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4131 SCSI_SENSE_BUFFERSIZE);
4132 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4133 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4134 scpnt->result);
4135 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4136 (void *) &scpnt->cmnd, scpnt->cmd_len);
4137
4138 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4139 fcp_rsp_iu->fcp_sns_len);
4140 memcpy(&scpnt->sense_buffer,
4141 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4142 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4143 (void *) &scpnt->sense_buffer, sns_len);
4144 }
4145
4146 /* check for overrun */
4147 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4148 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4149 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4150 "The response data length is "
4151 "%d, the original length was %d.\n",
4152 unit->fcp_lun,
4153 unit->port->wwpn,
4154 zfcp_get_busid_by_unit(unit),
4155 fcp_rsp_iu->fcp_resid,
4156 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4157 }
4158
4159 /* check for underrun */
4160 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4161 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4162 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4163 "The response data length is "
4164 "%d, the original length was %d.\n",
4165 unit->fcp_lun,
4166 unit->port->wwpn,
4167 zfcp_get_busid_by_unit(unit),
4168 fcp_rsp_iu->fcp_resid,
4169 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4170
4171 scpnt->resid = fcp_rsp_iu->fcp_resid;
4172 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4173 set_host_byte(&scpnt->result, DID_ERROR);
4174 }
4175
4176 skip_fsfstatus:
4177 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4178
4179 if (scpnt->result != 0)
4180 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
4181 else if (scpnt->retries > 0)
4182 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
4183 else
4184 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
4185
4186 /* cleanup pointer (need this especially for abort) */
4187 scpnt->host_scribble = NULL;
4188
4189 /* always call back */
4190 (scpnt->scsi_done) (scpnt);
4191
4192 /*
4193 * We must hold this lock until scsi_done has been called.
4194 * Otherwise we may call scsi_done after abort regarding this
4195 * command has completed.
4196 * Note: scsi_done must not block!
4197 */
4198 out:
4199 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4200 return retval;
4201 }
4202
4203 /*
4204 * function: zfcp_fsf_send_fcp_command_task_management_handler
4205 *
4206 * purpose: evaluates FCP_RSP IU
4207 *
4208 * returns:
4209 */
4210 static int
4211 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4212 {
4213 int retval = 0;
4214 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4215 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4216 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4217 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
4218
4219 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4220 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4221 goto skip_fsfstatus;
4222 }
4223
4224 /* check FCP_RSP_INFO */
4225 switch (fcp_rsp_info[3]) {
4226 case RSP_CODE_GOOD:
4227 /* ok, continue */
4228 ZFCP_LOG_DEBUG("no failure or Task Management "
4229 "Function complete\n");
4230 break;
4231 case RSP_CODE_TASKMAN_UNSUPP:
4232 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4233 "is not supported on the target device "
4234 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4235 unit->fcp_lun,
4236 unit->port->wwpn,
4237 zfcp_get_busid_by_unit(unit));
4238 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4239 break;
4240 case RSP_CODE_TASKMAN_FAILED:
4241 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4242 "failed to complete successfully. "
4243 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4244 unit->fcp_lun,
4245 unit->port->wwpn,
4246 zfcp_get_busid_by_unit(unit));
4247 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4248 break;
4249 default:
4250 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4251 "code was detected for a command. "
4252 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4253 "(debug info 0x%x)\n",
4254 unit->fcp_lun,
4255 unit->port->wwpn,
4256 zfcp_get_busid_by_unit(unit),
4257 fcp_rsp_info[3]);
4258 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4259 }
4260
4261 skip_fsfstatus:
4262 return retval;
4263 }
4264
4265
4266 /*
4267 * function: zfcp_fsf_control_file
4268 *
4269 * purpose: Initiator of the control file upload/download FSF requests
4270 *
4271 * returns: 0 - FSF request is successfuly created and queued
4272 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4273 * -EINVAL - Invalid direction specified
4274 * -ENOMEM - Insufficient memory
4275 * -EPERM - Cannot create FSF request or place it in QDIO queue
4276 */
4277 int
4278 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4279 struct zfcp_fsf_req **fsf_req_ptr,
4280 u32 fsf_command,
4281 u32 option,
4282 struct zfcp_sg_list *sg_list)
4283 {
4284 struct zfcp_fsf_req *fsf_req;
4285 struct fsf_qtcb_bottom_support *bottom;
4286 volatile struct qdio_buffer_element *sbale;
4287 unsigned long lock_flags;
4288 int req_flags = 0;
4289 int direction;
4290 int retval = 0;
4291
4292 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
4293 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4294 zfcp_get_busid_by_adapter(adapter));
4295 retval = -EOPNOTSUPP;
4296 goto out;
4297 }
4298
4299 switch (fsf_command) {
4300
4301 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4302 direction = SBAL_FLAGS0_TYPE_WRITE;
4303 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4304 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4305 req_flags = ZFCP_WAIT_FOR_SBAL;
4306 break;
4307
4308 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4309 direction = SBAL_FLAGS0_TYPE_READ;
4310 break;
4311
4312 default:
4313 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4314 retval = -EINVAL;
4315 goto out;
4316 }
4317
4318 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4319 NULL, &lock_flags, &fsf_req);
4320 if (retval < 0) {
4321 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4322 "adapter %s\n",
4323 zfcp_get_busid_by_adapter(adapter));
4324 retval = -EPERM;
4325 goto unlock_queue_lock;
4326 }
4327
4328 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4329 sbale[0].flags |= direction;
4330
4331 bottom = &fsf_req->qtcb->bottom.support;
4332 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4333 bottom->option = option;
4334
4335 if (sg_list->count > 0) {
4336 int bytes;
4337
4338 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4339 sg_list->sg, sg_list->count,
4340 ZFCP_MAX_SBALS_PER_REQ);
4341 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4342 ZFCP_LOG_INFO(
4343 "error: Could not create sufficient number of "
4344 "SBALS for an FSF request to the adapter %s\n",
4345 zfcp_get_busid_by_adapter(adapter));
4346 retval = -ENOMEM;
4347 goto free_fsf_req;
4348 }
4349 } else
4350 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4351
4352 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
4353 retval = zfcp_fsf_req_send(fsf_req);
4354 if (retval < 0) {
4355 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4356 "(adapter %s)\n",
4357 zfcp_get_busid_by_adapter(adapter));
4358 retval = -EPERM;
4359 goto free_fsf_req;
4360 }
4361 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4362
4363 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4364 "adapter %s\n",
4365 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4366 "download" : "upload",
4367 zfcp_get_busid_by_adapter(adapter));
4368
4369 wait_event(fsf_req->completion_wq,
4370 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4371
4372 *fsf_req_ptr = fsf_req;
4373 goto out;
4374
4375 free_fsf_req:
4376 zfcp_fsf_req_free(fsf_req);
4377 unlock_queue_lock:
4378 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4379 out:
4380 return retval;
4381 }
4382
4383
4384 /*
4385 * function: zfcp_fsf_control_file_handler
4386 *
4387 * purpose: Handler of the control file upload/download FSF requests
4388 *
4389 * returns: 0 - FSF request successfuly processed
4390 * -EAGAIN - Operation has to be repeated because of a temporary problem
4391 * -EACCES - There is no permission to execute an operation
4392 * -EPERM - The control file is not in a right format
4393 * -EIO - There is a problem with the FCP adapter
4394 * -EINVAL - Invalid operation
4395 * -EFAULT - User space memory I/O operation fault
4396 */
4397 static int
4398 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4399 {
4400 struct zfcp_adapter *adapter = fsf_req->adapter;
4401 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4402 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4403 int retval = 0;
4404
4405 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4406 retval = -EINVAL;
4407 goto skip_fsfstatus;
4408 }
4409
4410 switch (header->fsf_status) {
4411
4412 case FSF_GOOD:
4413 ZFCP_LOG_NORMAL(
4414 "The FSF request has been successfully completed "
4415 "on the adapter %s\n",
4416 zfcp_get_busid_by_adapter(adapter));
4417 break;
4418
4419 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4420 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4421 switch (header->fsf_status_qual.word[0]) {
4422
4423 case FSF_SQ_CFDC_HARDENED_ON_SE:
4424 ZFCP_LOG_NORMAL(
4425 "CFDC on the adapter %s has being "
4426 "hardened on primary and secondary SE\n",
4427 zfcp_get_busid_by_adapter(adapter));
4428 break;
4429
4430 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4431 ZFCP_LOG_NORMAL(
4432 "CFDC of the adapter %s could not "
4433 "be saved on the SE\n",
4434 zfcp_get_busid_by_adapter(adapter));
4435 break;
4436
4437 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4438 ZFCP_LOG_NORMAL(
4439 "CFDC of the adapter %s could not "
4440 "be copied to the secondary SE\n",
4441 zfcp_get_busid_by_adapter(adapter));
4442 break;
4443
4444 default:
4445 ZFCP_LOG_NORMAL(
4446 "CFDC could not be hardened "
4447 "on the adapter %s\n",
4448 zfcp_get_busid_by_adapter(adapter));
4449 }
4450 }
4451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4452 retval = -EAGAIN;
4453 break;
4454
4455 case FSF_AUTHORIZATION_FAILURE:
4456 ZFCP_LOG_NORMAL(
4457 "Adapter %s does not accept privileged commands\n",
4458 zfcp_get_busid_by_adapter(adapter));
4459 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4460 retval = -EACCES;
4461 break;
4462
4463 case FSF_CFDC_ERROR_DETECTED:
4464 ZFCP_LOG_NORMAL(
4465 "Error at position %d in the CFDC, "
4466 "CFDC is discarded by the adapter %s\n",
4467 header->fsf_status_qual.word[0],
4468 zfcp_get_busid_by_adapter(adapter));
4469 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4470 retval = -EPERM;
4471 break;
4472
4473 case FSF_CONTROL_FILE_UPDATE_ERROR:
4474 ZFCP_LOG_NORMAL(
4475 "Adapter %s cannot harden the control file, "
4476 "file is discarded\n",
4477 zfcp_get_busid_by_adapter(adapter));
4478 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4479 retval = -EIO;
4480 break;
4481
4482 case FSF_CONTROL_FILE_TOO_LARGE:
4483 ZFCP_LOG_NORMAL(
4484 "Control file is too large, file is discarded "
4485 "by the adapter %s\n",
4486 zfcp_get_busid_by_adapter(adapter));
4487 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4488 retval = -EIO;
4489 break;
4490
4491 case FSF_ACCESS_CONFLICT_DETECTED:
4492 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4493 ZFCP_LOG_NORMAL(
4494 "CFDC has been discarded by the adapter %s, "
4495 "because activation would impact "
4496 "%d active connection(s)\n",
4497 zfcp_get_busid_by_adapter(adapter),
4498 header->fsf_status_qual.word[0]);
4499 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4500 retval = -EIO;
4501 break;
4502
4503 case FSF_CONFLICTS_OVERRULED:
4504 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4505 ZFCP_LOG_NORMAL(
4506 "CFDC has been activated on the adapter %s, "
4507 "but activation has impacted "
4508 "%d active connection(s)\n",
4509 zfcp_get_busid_by_adapter(adapter),
4510 header->fsf_status_qual.word[0]);
4511 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4512 retval = -EIO;
4513 break;
4514
4515 case FSF_UNKNOWN_OP_SUBTYPE:
4516 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4517 "op_subtype=0x%x)\n",
4518 zfcp_get_busid_by_adapter(adapter),
4519 bottom->operation_subtype);
4520 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4521 retval = -EINVAL;
4522 break;
4523
4524 case FSF_INVALID_COMMAND_OPTION:
4525 ZFCP_LOG_NORMAL(
4526 "Invalid option 0x%x has been specified "
4527 "in QTCB bottom sent to the adapter %s\n",
4528 bottom->option,
4529 zfcp_get_busid_by_adapter(adapter));
4530 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4531 retval = -EINVAL;
4532 break;
4533
4534 default:
4535 ZFCP_LOG_NORMAL(
4536 "bug: An unknown/unexpected FSF status 0x%08x "
4537 "was presented on the adapter %s\n",
4538 header->fsf_status,
4539 zfcp_get_busid_by_adapter(adapter));
4540 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4541 debug_exception(fsf_req->adapter->erp_dbf, 0,
4542 &header->fsf_status_qual.word[0], sizeof(u32));
4543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4544 retval = -EINVAL;
4545 break;
4546 }
4547
4548 skip_fsfstatus:
4549 return retval;
4550 }
4551
4552 static inline int
4553 zfcp_fsf_req_sbal_check(unsigned long *flags,
4554 struct zfcp_qdio_queue *queue, int needed)
4555 {
4556 write_lock_irqsave(&queue->queue_lock, *flags);
4557 if (likely(atomic_read(&queue->free_count) >= needed))
4558 return 1;
4559 write_unlock_irqrestore(&queue->queue_lock, *flags);
4560 return 0;
4561 }
4562
4563 /*
4564 * set qtcb pointer in fsf_req and initialize QTCB
4565 */
4566 static inline void
4567 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
4568 {
4569 if (likely(fsf_req->qtcb != NULL)) {
4570 fsf_req->qtcb->prefix.req_seq_no =
4571 fsf_req->adapter->fsf_req_seq_no;
4572 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
4573 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4574 fsf_req->qtcb->prefix.qtcb_type =
4575 fsf_qtcb_type[fsf_req->fsf_command];
4576 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4577 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
4578 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
4579 }
4580 }
4581
4582 /**
4583 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4584 * @adapter: adapter for which request queue is examined
4585 * @req_flags: flags indicating whether to wait for needed SBAL or not
4586 * @lock_flags: lock_flags if queue_lock is taken
4587 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4588 * Locks: lock adapter->request_queue->queue_lock on success
4589 */
4590 static int
4591 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4592 unsigned long *lock_flags)
4593 {
4594 long ret;
4595 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4596
4597 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4598 ret = wait_event_interruptible_timeout(adapter->request_wq,
4599 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4600 ZFCP_SBAL_TIMEOUT);
4601 if (ret < 0)
4602 return ret;
4603 if (!ret)
4604 return -EIO;
4605 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4606 return -EIO;
4607
4608 return 0;
4609 }
4610
4611 /*
4612 * function: zfcp_fsf_req_create
4613 *
4614 * purpose: create an FSF request at the specified adapter and
4615 * setup common fields
4616 *
4617 * returns: -ENOMEM if there was insufficient memory for a request
4618 * -EIO if no qdio buffers could be allocate to the request
4619 * -EINVAL/-EPERM on bug conditions in req_dequeue
4620 * 0 in success
4621 *
4622 * note: The created request is returned by reference.
4623 *
4624 * locks: lock of concerned request queue must not be held,
4625 * but is held on completion (write, irqsave)
4626 */
4627 int
4628 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4629 mempool_t *pool, unsigned long *lock_flags,
4630 struct zfcp_fsf_req **fsf_req_p)
4631 {
4632 volatile struct qdio_buffer_element *sbale;
4633 struct zfcp_fsf_req *fsf_req = NULL;
4634 int ret = 0;
4635 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4636
4637 /* allocate new FSF request */
4638 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4639 if (unlikely(NULL == fsf_req)) {
4640 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4641 "the outbound (send) queue.\n");
4642 ret = -ENOMEM;
4643 goto failed_fsf_req;
4644 }
4645
4646 fsf_req->adapter = adapter;
4647 fsf_req->fsf_command = fsf_cmd;
4648 INIT_LIST_HEAD(&fsf_req->list);
4649
4650 /* this is serialized (we are holding req_queue-lock of adapter */
4651 if (adapter->req_no == 0)
4652 adapter->req_no++;
4653 fsf_req->req_id = adapter->req_no++;
4654
4655 init_timer(&fsf_req->timer);
4656 zfcp_fsf_req_qtcb_init(fsf_req);
4657
4658 /* initialize waitqueue which may be used to wait on
4659 this request completion */
4660 init_waitqueue_head(&fsf_req->completion_wq);
4661
4662 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4663 if(ret < 0) {
4664 goto failed_sbals;
4665 }
4666
4667 /*
4668 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4669 * if it is not set (see also *_open_qdio and *_close_qdio).
4670 */
4671
4672 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4673 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4674 ret = -EIO;
4675 goto failed_sbals;
4676 }
4677
4678 if (fsf_req->qtcb) {
4679 fsf_req->seq_no = adapter->fsf_req_seq_no;
4680 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4681 }
4682 fsf_req->sbal_number = 1;
4683 fsf_req->sbal_first = req_queue->free_index;
4684 fsf_req->sbal_curr = req_queue->free_index;
4685 fsf_req->sbale_curr = 1;
4686
4687 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4688 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4689 }
4690
4691 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4692
4693 /* setup common SBALE fields */
4694 sbale[0].addr = (void *) fsf_req->req_id;
4695 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4696 if (likely(fsf_req->qtcb != NULL)) {
4697 sbale[1].addr = (void *) fsf_req->qtcb;
4698 sbale[1].length = sizeof(struct fsf_qtcb);
4699 }
4700
4701 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4702 fsf_req->sbal_number, fsf_req->sbal_first);
4703
4704 goto success;
4705
4706 failed_sbals:
4707 /* dequeue new FSF request previously enqueued */
4708 zfcp_fsf_req_free(fsf_req);
4709 fsf_req = NULL;
4710
4711 failed_fsf_req:
4712 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4713 success:
4714 *fsf_req_p = fsf_req;
4715 return ret;
4716 }
4717
4718 /*
4719 * function: zfcp_fsf_req_send
4720 *
4721 * purpose: start transfer of FSF request via QDIO
4722 *
4723 * returns: 0 - request transfer succesfully started
4724 * !0 - start of request transfer failed
4725 */
4726 static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
4727 {
4728 struct zfcp_adapter *adapter;
4729 struct zfcp_qdio_queue *req_queue;
4730 volatile struct qdio_buffer_element *sbale;
4731 int inc_seq_no;
4732 int new_distance_from_int;
4733 u64 dbg_tmp[2];
4734 int retval = 0;
4735
4736 adapter = fsf_req->adapter;
4737 req_queue = &adapter->request_queue,
4738
4739
4740 /* FIXME(debug): remove it later */
4741 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4742 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4743 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4744 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4745 sbale[1].length);
4746
4747 /* put allocated FSF request into hash table */
4748 spin_lock(&adapter->req_list_lock);
4749 zfcp_reqlist_add(adapter, fsf_req);
4750 spin_unlock(&adapter->req_list_lock);
4751
4752 inc_seq_no = (fsf_req->qtcb != NULL);
4753
4754 ZFCP_LOG_TRACE("request queue of adapter %s: "
4755 "next free SBAL is %i, %i free SBALs\n",
4756 zfcp_get_busid_by_adapter(adapter),
4757 req_queue->free_index,
4758 atomic_read(&req_queue->free_count));
4759
4760 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4761 "index_in_queue=%i, count=%i, buffers=%p\n",
4762 zfcp_get_busid_by_adapter(adapter),
4763 QDIO_FLAG_SYNC_OUTPUT,
4764 0, fsf_req->sbal_first, fsf_req->sbal_number,
4765 &req_queue->buffer[fsf_req->sbal_first]);
4766
4767 /*
4768 * adjust the number of free SBALs in request queue as well as
4769 * position of first one
4770 */
4771 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4772 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4773 req_queue->free_index += fsf_req->sbal_number; /* increase */
4774 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4775 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4776
4777 fsf_req->issued = get_clock();
4778
4779 retval = do_QDIO(adapter->ccw_device,
4780 QDIO_FLAG_SYNC_OUTPUT,
4781 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4782
4783 dbg_tmp[0] = (unsigned long) sbale[0].addr;
4784 dbg_tmp[1] = (u64) retval;
4785 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
4786
4787 if (unlikely(retval)) {
4788 /* Queues are down..... */
4789 retval = -EIO;
4790 del_timer(&fsf_req->timer);
4791 spin_lock(&adapter->req_list_lock);
4792 zfcp_reqlist_remove(adapter, fsf_req->req_id);
4793 spin_unlock(&adapter->req_list_lock);
4794 /* undo changes in request queue made for this request */
4795 zfcp_qdio_zero_sbals(req_queue->buffer,
4796 fsf_req->sbal_first, fsf_req->sbal_number);
4797 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4798 req_queue->free_index -= fsf_req->sbal_number;
4799 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4800 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4801 zfcp_erp_adapter_reopen(adapter, 0);
4802 } else {
4803 req_queue->distance_from_int = new_distance_from_int;
4804 /*
4805 * increase FSF sequence counter -
4806 * this must only be done for request successfully enqueued to
4807 * QDIO this rejected requests may be cleaned up by calling
4808 * routines resulting in missing sequence counter values
4809 * otherwise,
4810 */
4811
4812 /* Don't increase for unsolicited status */
4813 if (inc_seq_no)
4814 adapter->fsf_req_seq_no++;
4815
4816 /* count FSF requests pending */
4817 atomic_inc(&adapter->reqs_active);
4818 }
4819 return retval;
4820 }
4821
4822 #undef ZFCP_LOG_AREA
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree