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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
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 * Never ever call this without shutting down the adapter first.
161 * Otherwise the adapter would continue using and corrupting s390 storage.
162 * Included BUG_ON() call to ensure this is done.
163 * ERP is supposed to be the only user of this function.
164 */
165 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
166 {
167 struct zfcp_fsf_req *fsf_req, *tmp;
168 unsigned long flags;
169 LIST_HEAD(remove_queue);
170 unsigned int i;
171
172 BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
173 spin_lock_irqsave(&adapter->req_list_lock, flags);
174 atomic_set(&adapter->reqs_active, 0);
175 for (i = 0; i < REQUEST_LIST_SIZE; i++)
176 list_splice_init(&adapter->req_list[i], &remove_queue);
177 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
178
179 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
180 list_del(&fsf_req->list);
181 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
182 zfcp_fsf_req_complete(fsf_req);
183 }
184 }
185
186 /*
187 * function: zfcp_fsf_req_complete
188 *
189 * purpose: Updates active counts and timers for openfcp-reqs
190 * May cleanup request after req_eval returns
191 *
192 * returns: 0 - success
193 * !0 - failure
194 *
195 * context:
196 */
197 int
198 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
199 {
200 int retval = 0;
201 int cleanup;
202
203 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
204 ZFCP_LOG_DEBUG("Status read response received\n");
205 /*
206 * Note: all cleanup handling is done in the callchain of
207 * the function call-chain below.
208 */
209 zfcp_fsf_status_read_handler(fsf_req);
210 goto out;
211 } else {
212 del_timer(&fsf_req->timer);
213 zfcp_fsf_protstatus_eval(fsf_req);
214 }
215
216 /*
217 * fsf_req may be deleted due to waking up functions, so
218 * cleanup is saved here and used later
219 */
220 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
221 cleanup = 1;
222 else
223 cleanup = 0;
224
225 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
226
227 /* cleanup request if requested by initiator */
228 if (likely(cleanup)) {
229 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
230 /*
231 * lock must not be held here since it will be
232 * grabed by the called routine, too
233 */
234 zfcp_fsf_req_free(fsf_req);
235 } else {
236 /* notify initiator waiting for the requests completion */
237 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
238 /*
239 * FIXME: Race! We must not access fsf_req here as it might have been
240 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
241 * flag. It's an improbable case. But, we have the same paranoia for
242 * the cleanup flag already.
243 * Might better be handled using complete()?
244 * (setting the flag and doing wakeup ought to be atomic
245 * with regard to checking the flag as long as waitqueue is
246 * part of the to be released structure)
247 */
248 wake_up(&fsf_req->completion_wq);
249 }
250
251 out:
252 return retval;
253 }
254
255 /*
256 * function: zfcp_fsf_protstatus_eval
257 *
258 * purpose: evaluates the QTCB of the finished FSF request
259 * and initiates appropriate actions
260 * (usually calling FSF command specific handlers)
261 *
262 * returns:
263 *
264 * context:
265 *
266 * locks:
267 */
268 static int
269 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
270 {
271 int retval = 0;
272 struct zfcp_adapter *adapter = fsf_req->adapter;
273 struct fsf_qtcb *qtcb = fsf_req->qtcb;
274 union fsf_prot_status_qual *prot_status_qual =
275 &qtcb->prefix.prot_status_qual;
276
277 zfcp_hba_dbf_event_fsf_response(fsf_req);
278
279 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
280 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
281 (unsigned long) fsf_req);
282 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
283 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
284 goto skip_protstatus;
285 }
286
287 /* log additional information provided by FSF (if any) */
288 if (likely(qtcb->header.log_length)) {
289 /* do not trust them ;-) */
290 if (unlikely(qtcb->header.log_start >
291 sizeof(struct fsf_qtcb))) {
292 ZFCP_LOG_NORMAL
293 ("bug: ULP (FSF logging) log data starts "
294 "beyond end of packet header. Ignored. "
295 "(start=%i, size=%li)\n",
296 qtcb->header.log_start,
297 sizeof(struct fsf_qtcb));
298 goto forget_log;
299 }
300 if (unlikely((size_t) (qtcb->header.log_start +
301 qtcb->header.log_length) >
302 sizeof(struct fsf_qtcb))) {
303 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
304 "beyond end of packet header. Ignored. "
305 "(start=%i, length=%i, size=%li)\n",
306 qtcb->header.log_start,
307 qtcb->header.log_length,
308 sizeof(struct fsf_qtcb));
309 goto forget_log;
310 }
311 ZFCP_LOG_TRACE("ULP log data: \n");
312 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
313 (char *) qtcb + qtcb->header.log_start,
314 qtcb->header.log_length);
315 }
316 forget_log:
317
318 /* evaluate FSF Protocol Status */
319 switch (qtcb->prefix.prot_status) {
320
321 case FSF_PROT_GOOD:
322 case FSF_PROT_FSF_STATUS_PRESENTED:
323 break;
324
325 case FSF_PROT_QTCB_VERSION_ERROR:
326 ZFCP_LOG_NORMAL("error: The adapter %s contains "
327 "microcode of version 0x%x, the device driver "
328 "only supports 0x%x. Aborting.\n",
329 zfcp_get_busid_by_adapter(adapter),
330 prot_status_qual->version_error.fsf_version,
331 ZFCP_QTCB_VERSION);
332 zfcp_erp_adapter_shutdown(adapter, 0);
333 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
334 break;
335
336 case FSF_PROT_SEQ_NUMB_ERROR:
337 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
338 "driver (0x%x) and adapter %s (0x%x). "
339 "Restarting all operations on this adapter.\n",
340 qtcb->prefix.req_seq_no,
341 zfcp_get_busid_by_adapter(adapter),
342 prot_status_qual->sequence_error.exp_req_seq_no);
343 zfcp_erp_adapter_reopen(adapter, 0);
344 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
345 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
346 break;
347
348 case FSF_PROT_UNSUPP_QTCB_TYPE:
349 ZFCP_LOG_NORMAL("error: Packet header type used by the "
350 "device driver is incompatible with "
351 "that used on adapter %s. "
352 "Stopping all operations on this adapter.\n",
353 zfcp_get_busid_by_adapter(adapter));
354 zfcp_erp_adapter_shutdown(adapter, 0);
355 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
356 break;
357
358 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
359 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
360 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
361 &(adapter->status));
362 break;
363
364 case FSF_PROT_DUPLICATE_REQUEST_ID:
365 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
366 "to the adapter %s is ambiguous. "
367 "Stopping all operations on this adapter.\n",
368 *(unsigned long long*)
369 (&qtcb->bottom.support.req_handle),
370 zfcp_get_busid_by_adapter(adapter));
371 zfcp_erp_adapter_shutdown(adapter, 0);
372 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
373 break;
374
375 case FSF_PROT_LINK_DOWN:
376 zfcp_fsf_link_down_info_eval(adapter,
377 &prot_status_qual->link_down_info);
378 zfcp_erp_adapter_reopen(adapter, 0);
379 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
380 break;
381
382 case FSF_PROT_REEST_QUEUE:
383 ZFCP_LOG_NORMAL("The local link to adapter with "
384 "%s was re-plugged. "
385 "Re-starting operations on this adapter.\n",
386 zfcp_get_busid_by_adapter(adapter));
387 /* All ports should be marked as ready to run again */
388 zfcp_erp_modify_adapter_status(adapter,
389 ZFCP_STATUS_COMMON_RUNNING,
390 ZFCP_SET);
391 zfcp_erp_adapter_reopen(adapter,
392 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
393 | ZFCP_STATUS_COMMON_ERP_FAILED);
394 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
395 break;
396
397 case FSF_PROT_ERROR_STATE:
398 ZFCP_LOG_NORMAL("error: The adapter %s "
399 "has entered the error state. "
400 "Restarting all operations on this "
401 "adapter.\n",
402 zfcp_get_busid_by_adapter(adapter));
403 zfcp_erp_adapter_reopen(adapter, 0);
404 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
405 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
406 break;
407
408 default:
409 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
410 "provided by the adapter %s "
411 "is not compatible with the device driver. "
412 "Stopping all operations on this adapter. "
413 "(debug info 0x%x).\n",
414 zfcp_get_busid_by_adapter(adapter),
415 qtcb->prefix.prot_status);
416 zfcp_erp_adapter_shutdown(adapter, 0);
417 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
418 }
419
420 skip_protstatus:
421 /*
422 * always call specific handlers to give them a chance to do
423 * something meaningful even in error cases
424 */
425 zfcp_fsf_fsfstatus_eval(fsf_req);
426 return retval;
427 }
428
429 /*
430 * function: zfcp_fsf_fsfstatus_eval
431 *
432 * purpose: evaluates FSF status of completed FSF request
433 * and acts accordingly
434 *
435 * returns:
436 */
437 static int
438 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
439 {
440 int retval = 0;
441
442 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
443 goto skip_fsfstatus;
444 }
445
446 /* evaluate FSF Status */
447 switch (fsf_req->qtcb->header.fsf_status) {
448 case FSF_UNKNOWN_COMMAND:
449 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
450 "not known by the adapter %s "
451 "Stopping all operations on this adapter. "
452 "(debug info 0x%x).\n",
453 zfcp_get_busid_by_adapter(fsf_req->adapter),
454 fsf_req->qtcb->header.fsf_command);
455 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
456 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
457 break;
458
459 case FSF_FCP_RSP_AVAILABLE:
460 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
461 "SCSI stack.\n");
462 break;
463
464 case FSF_ADAPTER_STATUS_AVAILABLE:
465 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
466 break;
467 }
468
469 skip_fsfstatus:
470 /*
471 * always call specific handlers to give them a chance to do
472 * something meaningful even in error cases
473 */
474 zfcp_fsf_req_dispatch(fsf_req);
475
476 return retval;
477 }
478
479 /*
480 * function: zfcp_fsf_fsfstatus_qual_eval
481 *
482 * purpose: evaluates FSF status-qualifier of completed FSF request
483 * and acts accordingly
484 *
485 * returns:
486 */
487 static int
488 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
489 {
490 int retval = 0;
491
492 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
493 case FSF_SQ_FCP_RSP_AVAILABLE:
494 break;
495 case FSF_SQ_RETRY_IF_POSSIBLE:
496 /* The SCSI-stack may now issue retries or escalate */
497 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
498 break;
499 case FSF_SQ_COMMAND_ABORTED:
500 /* Carry the aborted state on to upper layer */
501 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
502 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
503 break;
504 case FSF_SQ_NO_RECOM:
505 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
506 "problem on the adapter %s "
507 "Stopping all operations on this adapter. ",
508 zfcp_get_busid_by_adapter(fsf_req->adapter));
509 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
510 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
511 break;
512 case FSF_SQ_ULP_PROGRAMMING_ERROR:
513 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
514 "(adapter %s)\n",
515 zfcp_get_busid_by_adapter(fsf_req->adapter));
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
517 break;
518 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
519 case FSF_SQ_NO_RETRY_POSSIBLE:
520 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
521 /* dealt with in the respective functions */
522 break;
523 default:
524 ZFCP_LOG_NORMAL("bug: Additional status info could "
525 "not be interpreted properly.\n");
526 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
527 (char *) &fsf_req->qtcb->header.fsf_status_qual,
528 sizeof (union fsf_status_qual));
529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
530 break;
531 }
532
533 return retval;
534 }
535
536 /**
537 * zfcp_fsf_link_down_info_eval - evaluate link down information block
538 */
539 static void
540 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter,
541 struct fsf_link_down_info *link_down)
542 {
543 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
544 &adapter->status))
545 return;
546
547 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
548
549 if (link_down == NULL)
550 goto out;
551
552 switch (link_down->error_code) {
553 case FSF_PSQ_LINK_NO_LIGHT:
554 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
555 "(no light detected)\n",
556 zfcp_get_busid_by_adapter(adapter));
557 break;
558 case FSF_PSQ_LINK_WRAP_PLUG:
559 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
560 "(wrap plug detected)\n",
561 zfcp_get_busid_by_adapter(adapter));
562 break;
563 case FSF_PSQ_LINK_NO_FCP:
564 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
565 "(adjacent node on link does not support FCP)\n",
566 zfcp_get_busid_by_adapter(adapter));
567 break;
568 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
569 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
570 "(firmware update in progress)\n",
571 zfcp_get_busid_by_adapter(adapter));
572 break;
573 case FSF_PSQ_LINK_INVALID_WWPN:
574 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
575 "(duplicate or invalid WWPN detected)\n",
576 zfcp_get_busid_by_adapter(adapter));
577 break;
578 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
579 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
580 "(no support for NPIV by Fabric)\n",
581 zfcp_get_busid_by_adapter(adapter));
582 break;
583 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
584 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
585 "(out of resource in FCP daughtercard)\n",
586 zfcp_get_busid_by_adapter(adapter));
587 break;
588 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
589 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
590 "(out of resource in Fabric)\n",
591 zfcp_get_busid_by_adapter(adapter));
592 break;
593 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
594 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
595 "(unable to Fabric login)\n",
596 zfcp_get_busid_by_adapter(adapter));
597 break;
598 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
599 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
600 zfcp_get_busid_by_adapter(adapter));
601 break;
602 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
603 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
604 zfcp_get_busid_by_adapter(adapter));
605 break;
606 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
607 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
608 zfcp_get_busid_by_adapter(adapter));
609 break;
610 default:
611 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
612 "(warning: unknown reason code %d)\n",
613 zfcp_get_busid_by_adapter(adapter),
614 link_down->error_code);
615 }
616
617 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
618 ZFCP_LOG_DEBUG("Debug information to link down: "
619 "primary_status=0x%02x "
620 "ioerr_code=0x%02x "
621 "action_code=0x%02x "
622 "reason_code=0x%02x "
623 "explanation_code=0x%02x "
624 "vendor_specific_code=0x%02x\n",
625 link_down->primary_status,
626 link_down->ioerr_code,
627 link_down->action_code,
628 link_down->reason_code,
629 link_down->explanation_code,
630 link_down->vendor_specific_code);
631
632 out:
633 zfcp_erp_adapter_failed(adapter);
634 }
635
636 /*
637 * function: zfcp_fsf_req_dispatch
638 *
639 * purpose: calls the appropriate command specific handler
640 *
641 * returns:
642 */
643 static int
644 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
645 {
646 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
647 struct zfcp_adapter *adapter = fsf_req->adapter;
648 int retval = 0;
649
650
651 switch (fsf_req->fsf_command) {
652
653 case FSF_QTCB_FCP_CMND:
654 zfcp_fsf_send_fcp_command_handler(fsf_req);
655 break;
656
657 case FSF_QTCB_ABORT_FCP_CMND:
658 zfcp_fsf_abort_fcp_command_handler(fsf_req);
659 break;
660
661 case FSF_QTCB_SEND_GENERIC:
662 zfcp_fsf_send_ct_handler(fsf_req);
663 break;
664
665 case FSF_QTCB_OPEN_PORT_WITH_DID:
666 zfcp_fsf_open_port_handler(fsf_req);
667 break;
668
669 case FSF_QTCB_OPEN_LUN:
670 zfcp_fsf_open_unit_handler(fsf_req);
671 break;
672
673 case FSF_QTCB_CLOSE_LUN:
674 zfcp_fsf_close_unit_handler(fsf_req);
675 break;
676
677 case FSF_QTCB_CLOSE_PORT:
678 zfcp_fsf_close_port_handler(fsf_req);
679 break;
680
681 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
682 zfcp_fsf_close_physical_port_handler(fsf_req);
683 break;
684
685 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
686 zfcp_fsf_exchange_config_data_handler(fsf_req);
687 break;
688
689 case FSF_QTCB_EXCHANGE_PORT_DATA:
690 zfcp_fsf_exchange_port_data_handler(fsf_req);
691 break;
692
693 case FSF_QTCB_SEND_ELS:
694 zfcp_fsf_send_els_handler(fsf_req);
695 break;
696
697 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
698 zfcp_fsf_control_file_handler(fsf_req);
699 break;
700
701 case FSF_QTCB_UPLOAD_CONTROL_FILE:
702 zfcp_fsf_control_file_handler(fsf_req);
703 break;
704
705 default:
706 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
707 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
708 "not supported by the adapter %s\n",
709 zfcp_get_busid_by_adapter(adapter));
710 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
711 ZFCP_LOG_NORMAL
712 ("bug: Command issued by the device driver differs "
713 "from the command returned by the adapter %s "
714 "(debug info 0x%x, 0x%x).\n",
715 zfcp_get_busid_by_adapter(adapter),
716 fsf_req->fsf_command,
717 fsf_req->qtcb->header.fsf_command);
718 }
719
720 if (!erp_action)
721 return retval;
722
723 zfcp_erp_async_handler(erp_action, 0);
724
725 return retval;
726 }
727
728 /*
729 * function: zfcp_fsf_status_read
730 *
731 * purpose: initiates a Status Read command at the specified adapter
732 *
733 * returns:
734 */
735 int
736 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
737 {
738 struct zfcp_fsf_req *fsf_req;
739 struct fsf_status_read_buffer *status_buffer;
740 unsigned long lock_flags;
741 volatile struct qdio_buffer_element *sbale;
742 int retval = 0;
743
744 /* setup new FSF request */
745 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
746 req_flags | ZFCP_REQ_NO_QTCB,
747 adapter->pool.fsf_req_status_read,
748 &lock_flags, &fsf_req);
749 if (retval < 0) {
750 ZFCP_LOG_INFO("error: Could not create unsolicited status "
751 "buffer for adapter %s.\n",
752 zfcp_get_busid_by_adapter(adapter));
753 goto failed_req_create;
754 }
755
756 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
757 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
758 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
759 fsf_req->sbale_curr = 2;
760
761 status_buffer =
762 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
763 if (!status_buffer) {
764 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
765 goto failed_buf;
766 }
767 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
768 fsf_req->data = (unsigned long) status_buffer;
769
770 /* insert pointer to respective buffer */
771 sbale = zfcp_qdio_sbale_curr(fsf_req);
772 sbale->addr = (void *) status_buffer;
773 sbale->length = sizeof(struct fsf_status_read_buffer);
774
775 retval = zfcp_fsf_req_send(fsf_req);
776 if (retval) {
777 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
778 "environment.\n");
779 goto failed_req_send;
780 }
781
782 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
783 zfcp_get_busid_by_adapter(adapter));
784 goto out;
785
786 failed_req_send:
787 mempool_free(status_buffer, adapter->pool.data_status_read);
788
789 failed_buf:
790 zfcp_fsf_req_free(fsf_req);
791 failed_req_create:
792 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
793 out:
794 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
795 return retval;
796 }
797
798 static int
799 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
800 {
801 struct fsf_status_read_buffer *status_buffer;
802 struct zfcp_adapter *adapter;
803 struct zfcp_port *port;
804 unsigned long flags;
805
806 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
807 adapter = fsf_req->adapter;
808
809 read_lock_irqsave(&zfcp_data.config_lock, flags);
810 list_for_each_entry(port, &adapter->port_list_head, list)
811 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
812 break;
813 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
814
815 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
816 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
817 "nonexisting port with d_id 0x%06x on "
818 "adapter %s. Ignored.\n",
819 status_buffer->d_id & ZFCP_DID_MASK,
820 zfcp_get_busid_by_adapter(adapter));
821 goto out;
822 }
823
824 switch (status_buffer->status_subtype) {
825
826 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
827 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
828 zfcp_erp_port_reopen(port, 0);
829 break;
830
831 case FSF_STATUS_READ_SUB_ERROR_PORT:
832 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
833 zfcp_erp_port_shutdown(port, 0);
834 break;
835
836 default:
837 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
838 debug_exception(adapter->erp_dbf, 0,
839 &status_buffer->status_subtype, sizeof (u32));
840 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
841 "for a reopen indication on port with "
842 "d_id 0x%06x on the adapter %s. "
843 "Ignored. (debug info 0x%x)\n",
844 status_buffer->d_id,
845 zfcp_get_busid_by_adapter(adapter),
846 status_buffer->status_subtype);
847 }
848 out:
849 return 0;
850 }
851
852 /*
853 * function: zfcp_fsf_status_read_handler
854 *
855 * purpose: is called for finished Open Port command
856 *
857 * returns:
858 */
859 static int
860 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
861 {
862 int retval = 0;
863 struct zfcp_adapter *adapter = fsf_req->adapter;
864 struct fsf_status_read_buffer *status_buffer =
865 (struct fsf_status_read_buffer *) fsf_req->data;
866 struct fsf_bit_error_payload *fsf_bit_error;
867
868 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
869 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
870 mempool_free(status_buffer, adapter->pool.data_status_read);
871 zfcp_fsf_req_free(fsf_req);
872 goto out;
873 }
874
875 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
876
877 switch (status_buffer->status_type) {
878
879 case FSF_STATUS_READ_PORT_CLOSED:
880 zfcp_fsf_status_read_port_closed(fsf_req);
881 break;
882
883 case FSF_STATUS_READ_INCOMING_ELS:
884 zfcp_fsf_incoming_els(fsf_req);
885 break;
886
887 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
888 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
889 zfcp_get_busid_by_adapter(adapter));
890 break;
891
892 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
893 fsf_bit_error = (struct fsf_bit_error_payload *)
894 status_buffer->payload;
895 ZFCP_LOG_NORMAL("Warning: bit error threshold data "
896 "received (adapter %s, "
897 "link failures = %i, loss of sync errors = %i, "
898 "loss of signal errors = %i, "
899 "primitive sequence errors = %i, "
900 "invalid transmission word errors = %i, "
901 "CRC errors = %i)\n",
902 zfcp_get_busid_by_adapter(adapter),
903 fsf_bit_error->link_failure_error_count,
904 fsf_bit_error->loss_of_sync_error_count,
905 fsf_bit_error->loss_of_signal_error_count,
906 fsf_bit_error->primitive_sequence_error_count,
907 fsf_bit_error->invalid_transmission_word_error_count,
908 fsf_bit_error->crc_error_count);
909 ZFCP_LOG_INFO("Additional bit error threshold data "
910 "(adapter %s, "
911 "primitive sequence event time-outs = %i, "
912 "elastic buffer overrun errors = %i, "
913 "advertised receive buffer-to-buffer credit = %i, "
914 "current receice buffer-to-buffer credit = %i, "
915 "advertised transmit buffer-to-buffer credit = %i, "
916 "current transmit buffer-to-buffer credit = %i)\n",
917 zfcp_get_busid_by_adapter(adapter),
918 fsf_bit_error->primitive_sequence_event_timeout_count,
919 fsf_bit_error->elastic_buffer_overrun_error_count,
920 fsf_bit_error->advertised_receive_b2b_credit,
921 fsf_bit_error->current_receive_b2b_credit,
922 fsf_bit_error->advertised_transmit_b2b_credit,
923 fsf_bit_error->current_transmit_b2b_credit);
924 break;
925
926 case FSF_STATUS_READ_LINK_DOWN:
927 switch (status_buffer->status_subtype) {
928 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
929 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
930 zfcp_get_busid_by_adapter(adapter));
931 zfcp_fsf_link_down_info_eval(adapter,
932 (struct fsf_link_down_info *)
933 &status_buffer->payload);
934 break;
935 case FSF_STATUS_READ_SUB_FDISC_FAILED:
936 ZFCP_LOG_INFO("Local link to adapter %s is down "
937 "due to failed FDISC login\n",
938 zfcp_get_busid_by_adapter(adapter));
939 zfcp_fsf_link_down_info_eval(adapter,
940 (struct fsf_link_down_info *)
941 &status_buffer->payload);
942 break;
943 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
944 ZFCP_LOG_INFO("Local link to adapter %s is down "
945 "due to firmware update on adapter\n",
946 zfcp_get_busid_by_adapter(adapter));
947 zfcp_fsf_link_down_info_eval(adapter, NULL);
948 break;
949 default:
950 ZFCP_LOG_INFO("Local link to adapter %s is down "
951 "due to unknown reason\n",
952 zfcp_get_busid_by_adapter(adapter));
953 zfcp_fsf_link_down_info_eval(adapter, NULL);
954 };
955 break;
956
957 case FSF_STATUS_READ_LINK_UP:
958 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
959 "Restarting operations on this adapter\n",
960 zfcp_get_busid_by_adapter(adapter));
961 /* All ports should be marked as ready to run again */
962 zfcp_erp_modify_adapter_status(adapter,
963 ZFCP_STATUS_COMMON_RUNNING,
964 ZFCP_SET);
965 zfcp_erp_adapter_reopen(adapter,
966 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
967 | ZFCP_STATUS_COMMON_ERP_FAILED);
968 break;
969
970 case FSF_STATUS_READ_NOTIFICATION_LOST:
971 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
972 "adapter %s%s%s%s%s%s%s%s%s\n",
973 zfcp_get_busid_by_adapter(adapter),
974 (status_buffer->status_subtype &
975 FSF_STATUS_READ_SUB_INCOMING_ELS) ?
976 ", incoming ELS" : "",
977 (status_buffer->status_subtype &
978 FSF_STATUS_READ_SUB_SENSE_DATA) ?
979 ", sense data" : "",
980 (status_buffer->status_subtype &
981 FSF_STATUS_READ_SUB_LINK_STATUS) ?
982 ", link status change" : "",
983 (status_buffer->status_subtype &
984 FSF_STATUS_READ_SUB_PORT_CLOSED) ?
985 ", port close" : "",
986 (status_buffer->status_subtype &
987 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
988 ", bit error exception" : "",
989 (status_buffer->status_subtype &
990 FSF_STATUS_READ_SUB_ACT_UPDATED) ?
991 ", ACT update" : "",
992 (status_buffer->status_subtype &
993 FSF_STATUS_READ_SUB_ACT_HARDENED) ?
994 ", ACT hardening" : "",
995 (status_buffer->status_subtype &
996 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
997 ", adapter feature change" : "");
998
999 if (status_buffer->status_subtype &
1000 FSF_STATUS_READ_SUB_ACT_UPDATED)
1001 zfcp_erp_adapter_access_changed(adapter);
1002 break;
1003
1004 case FSF_STATUS_READ_CFDC_UPDATED:
1005 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
1006 zfcp_get_busid_by_adapter(adapter));
1007 zfcp_erp_adapter_access_changed(adapter);
1008 break;
1009
1010 case FSF_STATUS_READ_CFDC_HARDENED:
1011 switch (status_buffer->status_subtype) {
1012 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
1013 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
1014 zfcp_get_busid_by_adapter(adapter));
1015 break;
1016 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
1017 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
1018 "to the secondary SE\n",
1019 zfcp_get_busid_by_adapter(adapter));
1020 break;
1021 default:
1022 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
1023 zfcp_get_busid_by_adapter(adapter));
1024 }
1025 break;
1026
1027 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
1028 debug_text_event(adapter->erp_dbf, 2, "unsol_features:");
1029 ZFCP_LOG_INFO("List of supported features on adapter %s has "
1030 "been changed from 0x%08X to 0x%08X\n",
1031 zfcp_get_busid_by_adapter(adapter),
1032 *(u32*) (status_buffer->payload + 4),
1033 *(u32*) (status_buffer->payload));
1034 adapter->adapter_features = *(u32*) status_buffer->payload;
1035 break;
1036
1037 default:
1038 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1039 "type was received (debug info 0x%x)\n",
1040 status_buffer->status_type);
1041 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1042 status_buffer);
1043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1044 (char *) status_buffer,
1045 sizeof (struct fsf_status_read_buffer));
1046 break;
1047 }
1048 mempool_free(status_buffer, adapter->pool.data_status_read);
1049 zfcp_fsf_req_free(fsf_req);
1050 /*
1051 * recycle buffer and start new request repeat until outbound
1052 * queue is empty or adapter shutdown is requested
1053 */
1054 /*
1055 * FIXME(qdio):
1056 * we may wait in the req_create for 5s during shutdown, so
1057 * qdio_cleanup will have to wait at least that long before returning
1058 * with failure to allow us a proper cleanup under all circumstances
1059 */
1060 /*
1061 * FIXME:
1062 * allocation failure possible? (Is this code needed?)
1063 */
1064 retval = zfcp_fsf_status_read(adapter, 0);
1065 if (retval < 0) {
1066 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1067 "request for the adapter %s.\n",
1068 zfcp_get_busid_by_adapter(adapter));
1069 /* temporary fix to avoid status read buffer shortage */
1070 adapter->status_read_failed++;
1071 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1072 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1073 ZFCP_LOG_INFO("restart adapter %s due to status read "
1074 "buffer shortage\n",
1075 zfcp_get_busid_by_adapter(adapter));
1076 zfcp_erp_adapter_reopen(adapter, 0);
1077 }
1078 }
1079 out:
1080 return retval;
1081 }
1082
1083 /*
1084 * function: zfcp_fsf_abort_fcp_command
1085 *
1086 * purpose: tells FSF to abort a running SCSI command
1087 *
1088 * returns: address of initiated FSF request
1089 * NULL - request could not be initiated
1090 *
1091 * FIXME(design): should be watched by a timeout !!!
1092 * FIXME(design) shouldn't this be modified to return an int
1093 * also...don't know how though
1094 */
1095 struct zfcp_fsf_req *
1096 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1097 struct zfcp_adapter *adapter,
1098 struct zfcp_unit *unit, int req_flags)
1099 {
1100 volatile struct qdio_buffer_element *sbale;
1101 struct zfcp_fsf_req *fsf_req = NULL;
1102 unsigned long lock_flags;
1103 int retval = 0;
1104
1105 /* setup new FSF request */
1106 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1107 req_flags, adapter->pool.fsf_req_abort,
1108 &lock_flags, &fsf_req);
1109 if (retval < 0) {
1110 ZFCP_LOG_INFO("error: Failed to create an abort command "
1111 "request for lun 0x%016Lx on port 0x%016Lx "
1112 "on adapter %s.\n",
1113 unit->fcp_lun,
1114 unit->port->wwpn,
1115 zfcp_get_busid_by_adapter(adapter));
1116 goto out;
1117 }
1118
1119 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1120 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1121 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1122
1123 fsf_req->data = (unsigned long) unit;
1124
1125 /* set handles of unit and its parent port in QTCB */
1126 fsf_req->qtcb->header.lun_handle = unit->handle;
1127 fsf_req->qtcb->header.port_handle = unit->port->handle;
1128
1129 /* set handle of request which should be aborted */
1130 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1131
1132 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
1133 retval = zfcp_fsf_req_send(fsf_req);
1134 if (retval) {
1135 ZFCP_LOG_INFO("error: Failed to send abort command request "
1136 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1137 zfcp_get_busid_by_adapter(adapter),
1138 unit->port->wwpn, unit->fcp_lun);
1139 zfcp_fsf_req_free(fsf_req);
1140 fsf_req = NULL;
1141 goto out;
1142 }
1143
1144 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1145 "(adapter%s, port d_id=0x%06x, "
1146 "unit x%016Lx, old_req_id=0x%lx)\n",
1147 zfcp_get_busid_by_adapter(adapter),
1148 unit->port->d_id,
1149 unit->fcp_lun, old_req_id);
1150 out:
1151 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1152 return fsf_req;
1153 }
1154
1155 /*
1156 * function: zfcp_fsf_abort_fcp_command_handler
1157 *
1158 * purpose: is called for finished Abort FCP Command request
1159 *
1160 * returns:
1161 */
1162 static int
1163 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1164 {
1165 int retval = -EINVAL;
1166 struct zfcp_unit *unit;
1167 unsigned char status_qual =
1168 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1169
1170 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1171 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1172 goto skip_fsfstatus;
1173 }
1174
1175 unit = (struct zfcp_unit *) new_fsf_req->data;
1176
1177 /* evaluate FSF status in QTCB */
1178 switch (new_fsf_req->qtcb->header.fsf_status) {
1179
1180 case FSF_PORT_HANDLE_NOT_VALID:
1181 if (status_qual >> 4 != status_qual % 0xf) {
1182 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1183 "fsf_s_phand_nv0");
1184 /*
1185 * In this case a command that was sent prior to a port
1186 * reopen was aborted (handles are different). This is
1187 * fine.
1188 */
1189 } else {
1190 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1191 "port 0x%016Lx on adapter %s invalid. "
1192 "This may happen occasionally.\n",
1193 unit->port->handle,
1194 unit->port->wwpn,
1195 zfcp_get_busid_by_unit(unit));
1196 ZFCP_LOG_INFO("status qualifier:\n");
1197 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1198 (char *) &new_fsf_req->qtcb->header.
1199 fsf_status_qual,
1200 sizeof (union fsf_status_qual));
1201 /* Let's hope this sorts out the mess */
1202 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1203 "fsf_s_phand_nv1");
1204 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1205 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1206 }
1207 break;
1208
1209 case FSF_LUN_HANDLE_NOT_VALID:
1210 if (status_qual >> 4 != status_qual % 0xf) {
1211 /* 2 */
1212 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1213 "fsf_s_lhand_nv0");
1214 /*
1215 * In this case a command that was sent prior to a unit
1216 * reopen was aborted (handles are different).
1217 * This is fine.
1218 */
1219 } else {
1220 ZFCP_LOG_INFO
1221 ("Warning: Temporary LUN identifier 0x%x of LUN "
1222 "0x%016Lx on port 0x%016Lx on adapter %s is "
1223 "invalid. This may happen in rare cases. "
1224 "Trying to re-establish link.\n",
1225 unit->handle,
1226 unit->fcp_lun,
1227 unit->port->wwpn,
1228 zfcp_get_busid_by_unit(unit));
1229 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1230 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1231 (char *) &new_fsf_req->qtcb->header.
1232 fsf_status_qual,
1233 sizeof (union fsf_status_qual));
1234 /* Let's hope this sorts out the mess */
1235 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1236 "fsf_s_lhand_nv1");
1237 zfcp_erp_port_reopen(unit->port, 0);
1238 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1239 }
1240 break;
1241
1242 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1243 retval = 0;
1244 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1245 "fsf_s_no_exist");
1246 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1247 break;
1248
1249 case FSF_PORT_BOXED:
1250 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1251 "be reopened\n", unit->port->wwpn,
1252 zfcp_get_busid_by_unit(unit));
1253 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1254 "fsf_s_pboxed");
1255 zfcp_erp_port_boxed(unit->port);
1256 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1257 | ZFCP_STATUS_FSFREQ_RETRY;
1258 break;
1259
1260 case FSF_LUN_BOXED:
1261 ZFCP_LOG_INFO(
1262 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1263 "to be reopened\n",
1264 unit->fcp_lun, unit->port->wwpn,
1265 zfcp_get_busid_by_unit(unit));
1266 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1267 zfcp_erp_unit_boxed(unit);
1268 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1269 | ZFCP_STATUS_FSFREQ_RETRY;
1270 break;
1271
1272 case FSF_ADAPTER_STATUS_AVAILABLE:
1273 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1274 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1275 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1276 "fsf_sq_ltest");
1277 zfcp_test_link(unit->port);
1278 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1279 break;
1280 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1281 /* SCSI stack will escalate */
1282 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1283 "fsf_sq_ulp");
1284 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1285 break;
1286 default:
1287 ZFCP_LOG_NORMAL
1288 ("bug: Wrong status qualifier 0x%x arrived.\n",
1289 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1290 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1291 "fsf_sq_inval:");
1292 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1293 &new_fsf_req->qtcb->header.
1294 fsf_status_qual.word[0], sizeof (u32));
1295 break;
1296 }
1297 break;
1298
1299 case FSF_GOOD:
1300 retval = 0;
1301 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1302 break;
1303
1304 default:
1305 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1306 "(debug info 0x%x)\n",
1307 new_fsf_req->qtcb->header.fsf_status);
1308 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1309 "fsf_s_inval:");
1310 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1311 &new_fsf_req->qtcb->header.fsf_status,
1312 sizeof (u32));
1313 break;
1314 }
1315 skip_fsfstatus:
1316 return retval;
1317 }
1318
1319 /**
1320 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1321 * one SBALE
1322 * Two scatter-gather lists are passed, one for the reqeust and one for the
1323 * response.
1324 */
1325 static inline int
1326 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1327 struct scatterlist *resp, int resp_count)
1328 {
1329 return ((req_count == 1) &&
1330 (resp_count == 1) &&
1331 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1332 PAGE_MASK) ==
1333 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1334 req[0].length - 1) & PAGE_MASK)) &&
1335 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1336 PAGE_MASK) ==
1337 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1338 resp[0].length - 1) & PAGE_MASK)));
1339 }
1340
1341 /**
1342 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1343 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1344 * the request
1345 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1346 * a struct zfcp_fsf_req
1347 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1348 * is sent within error recovery
1349 */
1350 int
1351 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1352 struct zfcp_erp_action *erp_action)
1353 {
1354 volatile struct qdio_buffer_element *sbale;
1355 struct zfcp_port *port;
1356 struct zfcp_adapter *adapter;
1357 struct zfcp_fsf_req *fsf_req;
1358 unsigned long lock_flags;
1359 int bytes;
1360 int ret = 0;
1361
1362 port = ct->port;
1363 adapter = port->adapter;
1364
1365 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1366 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1367 pool, &lock_flags, &fsf_req);
1368 if (ret < 0) {
1369 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1370 "adapter: %s\n",
1371 zfcp_get_busid_by_adapter(adapter));
1372 goto failed_req;
1373 }
1374
1375 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1376 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1377 ct->resp, ct->resp_count)){
1378 /* both request buffer and response buffer
1379 fit into one sbale each */
1380 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1381 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1382 sbale[2].length = ct->req[0].length;
1383 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1384 sbale[3].length = ct->resp[0].length;
1385 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1386 } else if (adapter->adapter_features &
1387 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1388 /* try to use chained SBALs */
1389 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1390 SBAL_FLAGS0_TYPE_WRITE_READ,
1391 ct->req, ct->req_count,
1392 ZFCP_MAX_SBALS_PER_CT_REQ);
1393 if (bytes <= 0) {
1394 ZFCP_LOG_INFO("error: creation of CT request failed "
1395 "on adapter %s\n",
1396 zfcp_get_busid_by_adapter(adapter));
1397 if (bytes == 0)
1398 ret = -ENOMEM;
1399 else
1400 ret = bytes;
1401
1402 goto failed_send;
1403 }
1404 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1405 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1406 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1407 SBAL_FLAGS0_TYPE_WRITE_READ,
1408 ct->resp, ct->resp_count,
1409 ZFCP_MAX_SBALS_PER_CT_REQ);
1410 if (bytes <= 0) {
1411 ZFCP_LOG_INFO("error: creation of CT request failed "
1412 "on adapter %s\n",
1413 zfcp_get_busid_by_adapter(adapter));
1414 if (bytes == 0)
1415 ret = -ENOMEM;
1416 else
1417 ret = bytes;
1418
1419 goto failed_send;
1420 }
1421 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1422 } else {
1423 /* reject send generic request */
1424 ZFCP_LOG_INFO(
1425 "error: microcode does not support chained SBALs,"
1426 "CT request too big (adapter %s)\n",
1427 zfcp_get_busid_by_adapter(adapter));
1428 ret = -EOPNOTSUPP;
1429 goto failed_send;
1430 }
1431
1432 /* settings in QTCB */
1433 fsf_req->qtcb->header.port_handle = port->handle;
1434 fsf_req->qtcb->bottom.support.service_class =
1435 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1436 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1437 fsf_req->data = (unsigned long) ct;
1438
1439 zfcp_san_dbf_event_ct_request(fsf_req);
1440
1441 if (erp_action) {
1442 erp_action->fsf_req = fsf_req;
1443 fsf_req->erp_action = erp_action;
1444 zfcp_erp_start_timer(fsf_req);
1445 } else
1446 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1447
1448 ret = zfcp_fsf_req_send(fsf_req);
1449 if (ret) {
1450 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1451 "(adapter %s, port 0x%016Lx)\n",
1452 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1453 goto failed_send;
1454 }
1455
1456 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1457 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1458 goto out;
1459
1460 failed_send:
1461 zfcp_fsf_req_free(fsf_req);
1462 if (erp_action != NULL) {
1463 erp_action->fsf_req = NULL;
1464 }
1465 failed_req:
1466 out:
1467 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1468 lock_flags);
1469 return ret;
1470 }
1471
1472 /**
1473 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1474 * @fsf_req: pointer to struct zfcp_fsf_req
1475 *
1476 * Data specific for the Generic Service request is passed using
1477 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1478 * Usually a specific handler for the CT request is called which is
1479 * found in this structure.
1480 */
1481 static int
1482 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1483 {
1484 struct zfcp_port *port;
1485 struct zfcp_adapter *adapter;
1486 struct zfcp_send_ct *send_ct;
1487 struct fsf_qtcb_header *header;
1488 struct fsf_qtcb_bottom_support *bottom;
1489 int retval = -EINVAL;
1490 u16 subtable, rule, counter;
1491
1492 adapter = fsf_req->adapter;
1493 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1494 port = send_ct->port;
1495 header = &fsf_req->qtcb->header;
1496 bottom = &fsf_req->qtcb->bottom.support;
1497
1498 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1499 goto skip_fsfstatus;
1500
1501 /* evaluate FSF status in QTCB */
1502 switch (header->fsf_status) {
1503
1504 case FSF_GOOD:
1505 zfcp_san_dbf_event_ct_response(fsf_req);
1506 retval = 0;
1507 break;
1508
1509 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1510 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1511 "class %d.\n",
1512 zfcp_get_busid_by_port(port),
1513 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1514 /* stop operation for this adapter */
1515 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1516 zfcp_erp_adapter_shutdown(adapter, 0);
1517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1518 break;
1519
1520 case FSF_ADAPTER_STATUS_AVAILABLE:
1521 switch (header->fsf_status_qual.word[0]){
1522 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1523 /* reopening link to port */
1524 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1525 zfcp_test_link(port);
1526 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1527 break;
1528 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1529 /* ERP strategy will escalate */
1530 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1531 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1532 break;
1533 default:
1534 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1535 "arrived.\n",
1536 header->fsf_status_qual.word[0]);
1537 break;
1538 }
1539 break;
1540
1541 case FSF_ACCESS_DENIED:
1542 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1543 "command (adapter %s, port d_id=0x%06x)\n",
1544 zfcp_get_busid_by_port(port), port->d_id);
1545 for (counter = 0; counter < 2; counter++) {
1546 subtable = header->fsf_status_qual.halfword[counter * 2];
1547 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1548 switch (subtable) {
1549 case FSF_SQ_CFDC_SUBTABLE_OS:
1550 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1551 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1552 case FSF_SQ_CFDC_SUBTABLE_LUN:
1553 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1554 zfcp_act_subtable_type[subtable], rule);
1555 break;
1556 }
1557 }
1558 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1559 zfcp_erp_port_access_denied(port);
1560 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1561 break;
1562
1563 case FSF_GENERIC_COMMAND_REJECTED:
1564 ZFCP_LOG_INFO("generic service command rejected "
1565 "(adapter %s, port d_id=0x%06x)\n",
1566 zfcp_get_busid_by_port(port), port->d_id);
1567 ZFCP_LOG_INFO("status qualifier:\n");
1568 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1569 (char *) &header->fsf_status_qual,
1570 sizeof (union fsf_status_qual));
1571 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1572 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1573 break;
1574
1575 case FSF_PORT_HANDLE_NOT_VALID:
1576 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1577 "0x%016Lx on adapter %s invalid. This may "
1578 "happen occasionally.\n", port->handle,
1579 port->wwpn, zfcp_get_busid_by_port(port));
1580 ZFCP_LOG_INFO("status qualifier:\n");
1581 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1582 (char *) &header->fsf_status_qual,
1583 sizeof (union fsf_status_qual));
1584 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1585 zfcp_erp_adapter_reopen(adapter, 0);
1586 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1587 break;
1588
1589 case FSF_PORT_BOXED:
1590 ZFCP_LOG_INFO("port needs to be reopened "
1591 "(adapter %s, port d_id=0x%06x)\n",
1592 zfcp_get_busid_by_port(port), port->d_id);
1593 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1594 zfcp_erp_port_boxed(port);
1595 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1596 | ZFCP_STATUS_FSFREQ_RETRY;
1597 break;
1598
1599 /* following states should never occure, all cases avoided
1600 in zfcp_fsf_send_ct - but who knows ... */
1601 case FSF_PAYLOAD_SIZE_MISMATCH:
1602 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1603 "req_buf_length=%d, resp_buf_length=%d)\n",
1604 zfcp_get_busid_by_adapter(adapter),
1605 bottom->req_buf_length, bottom->resp_buf_length);
1606 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1607 break;
1608 case FSF_REQUEST_SIZE_TOO_LARGE:
1609 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1610 "req_buf_length=%d)\n",
1611 zfcp_get_busid_by_adapter(adapter),
1612 bottom->req_buf_length);
1613 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1614 break;
1615 case FSF_RESPONSE_SIZE_TOO_LARGE:
1616 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1617 "resp_buf_length=%d)\n",
1618 zfcp_get_busid_by_adapter(adapter),
1619 bottom->resp_buf_length);
1620 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1621 break;
1622 case FSF_SBAL_MISMATCH:
1623 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1624 "resp_buf_length=%d)\n",
1625 zfcp_get_busid_by_adapter(adapter),
1626 bottom->req_buf_length, bottom->resp_buf_length);
1627 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1628 break;
1629
1630 default:
1631 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1632 "(debug info 0x%x)\n", header->fsf_status);
1633 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1634 debug_exception(adapter->erp_dbf, 0,
1635 &header->fsf_status_qual.word[0], sizeof (u32));
1636 break;
1637 }
1638
1639 skip_fsfstatus:
1640 send_ct->status = retval;
1641
1642 if (send_ct->handler != NULL)
1643 send_ct->handler(send_ct->handler_data);
1644
1645 return retval;
1646 }
1647
1648 /**
1649 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1650 * @els: pointer to struct zfcp_send_els which contains all needed data for
1651 * the command.
1652 */
1653 int
1654 zfcp_fsf_send_els(struct zfcp_send_els *els)
1655 {
1656 volatile struct qdio_buffer_element *sbale;
1657 struct zfcp_fsf_req *fsf_req;
1658 u32 d_id;
1659 struct zfcp_adapter *adapter;
1660 unsigned long lock_flags;
1661 int bytes;
1662 int ret = 0;
1663
1664 d_id = els->d_id;
1665 adapter = els->adapter;
1666
1667 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1668 ZFCP_REQ_AUTO_CLEANUP,
1669 NULL, &lock_flags, &fsf_req);
1670 if (ret < 0) {
1671 ZFCP_LOG_INFO("error: creation of ELS request failed "
1672 "(adapter %s, port d_id: 0x%06x)\n",
1673 zfcp_get_busid_by_adapter(adapter), d_id);
1674 goto failed_req;
1675 }
1676
1677 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1678 if (zfcp_use_one_sbal(els->req, els->req_count,
1679 els->resp, els->resp_count)){
1680 /* both request buffer and response buffer
1681 fit into one sbale each */
1682 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1683 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1684 sbale[2].length = els->req[0].length;
1685 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1686 sbale[3].length = els->resp[0].length;
1687 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1688 } else if (adapter->adapter_features &
1689 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1690 /* try to use chained SBALs */
1691 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1692 SBAL_FLAGS0_TYPE_WRITE_READ,
1693 els->req, els->req_count,
1694 ZFCP_MAX_SBALS_PER_ELS_REQ);
1695 if (bytes <= 0) {
1696 ZFCP_LOG_INFO("error: creation of ELS request failed "
1697 "(adapter %s, port d_id: 0x%06x)\n",
1698 zfcp_get_busid_by_adapter(adapter), d_id);
1699 if (bytes == 0) {
1700 ret = -ENOMEM;
1701 } else {
1702 ret = bytes;
1703 }
1704 goto failed_send;
1705 }
1706 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1707 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1708 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1709 SBAL_FLAGS0_TYPE_WRITE_READ,
1710 els->resp, els->resp_count,
1711 ZFCP_MAX_SBALS_PER_ELS_REQ);
1712 if (bytes <= 0) {
1713 ZFCP_LOG_INFO("error: creation of ELS request failed "
1714 "(adapter %s, port d_id: 0x%06x)\n",
1715 zfcp_get_busid_by_adapter(adapter), d_id);
1716 if (bytes == 0) {
1717 ret = -ENOMEM;
1718 } else {
1719 ret = bytes;
1720 }
1721 goto failed_send;
1722 }
1723 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1724 } else {
1725 /* reject request */
1726 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1727 ", ELS request too big (adapter %s, "
1728 "port d_id: 0x%06x)\n",
1729 zfcp_get_busid_by_adapter(adapter), d_id);
1730 ret = -EOPNOTSUPP;
1731 goto failed_send;
1732 }
1733
1734 /* settings in QTCB */
1735 fsf_req->qtcb->bottom.support.d_id = d_id;
1736 fsf_req->qtcb->bottom.support.service_class =
1737 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1738 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1739 fsf_req->data = (unsigned long) els;
1740
1741 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1742
1743 zfcp_san_dbf_event_els_request(fsf_req);
1744
1745 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1746 ret = zfcp_fsf_req_send(fsf_req);
1747 if (ret) {
1748 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1749 "(adapter %s, port d_id: 0x%06x)\n",
1750 zfcp_get_busid_by_adapter(adapter), d_id);
1751 goto failed_send;
1752 }
1753
1754 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1755 "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1756 goto out;
1757
1758 failed_send:
1759 zfcp_fsf_req_free(fsf_req);
1760
1761 failed_req:
1762 out:
1763 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1764 lock_flags);
1765
1766 return ret;
1767 }
1768
1769 /**
1770 * zfcp_fsf_send_els_handler - handler for ELS commands
1771 * @fsf_req: pointer to struct zfcp_fsf_req
1772 *
1773 * Data specific for the ELS command is passed using
1774 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1775 * Usually a specific handler for the ELS command is called which is
1776 * found in this structure.
1777 */
1778 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1779 {
1780 struct zfcp_adapter *adapter;
1781 struct zfcp_port *port;
1782 u32 d_id;
1783 struct fsf_qtcb_header *header;
1784 struct fsf_qtcb_bottom_support *bottom;
1785 struct zfcp_send_els *send_els;
1786 int retval = -EINVAL;
1787 u16 subtable, rule, counter;
1788
1789 send_els = (struct zfcp_send_els *) fsf_req->data;
1790 adapter = send_els->adapter;
1791 port = send_els->port;
1792 d_id = send_els->d_id;
1793 header = &fsf_req->qtcb->header;
1794 bottom = &fsf_req->qtcb->bottom.support;
1795
1796 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1797 goto skip_fsfstatus;
1798
1799 switch (header->fsf_status) {
1800
1801 case FSF_GOOD:
1802 zfcp_san_dbf_event_els_response(fsf_req);
1803 retval = 0;
1804 break;
1805
1806 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1807 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1808 "class %d.\n",
1809 zfcp_get_busid_by_adapter(adapter),
1810 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1811 /* stop operation for this adapter */
1812 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1813 zfcp_erp_adapter_shutdown(adapter, 0);
1814 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1815 break;
1816
1817 case FSF_ADAPTER_STATUS_AVAILABLE:
1818 switch (header->fsf_status_qual.word[0]){
1819 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1820 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1821 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1822 zfcp_test_link(port);
1823 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1824 break;
1825 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1826 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1827 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1828 retval =
1829 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1830 (struct zfcp_ls_rjt_par *)
1831 &header->fsf_status_qual.word[2]);
1832 break;
1833 case FSF_SQ_RETRY_IF_POSSIBLE:
1834 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1835 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1836 break;
1837 default:
1838 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1839 header->fsf_status_qual.word[0]);
1840 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1841 (char*)header->fsf_status_qual.word, 16);
1842 }
1843 break;
1844
1845 case FSF_ELS_COMMAND_REJECTED:
1846 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1847 "prohibited sending "
1848 "(adapter: %s, port d_id: 0x%06x)\n",
1849 zfcp_get_busid_by_adapter(adapter), d_id);
1850
1851 break;
1852
1853 case FSF_PAYLOAD_SIZE_MISMATCH:
1854 ZFCP_LOG_INFO(
1855 "ELS request size and ELS response size must be either "
1856 "both 0, or both greater than 0 "
1857 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1858 zfcp_get_busid_by_adapter(adapter),
1859 bottom->req_buf_length,
1860 bottom->resp_buf_length);
1861 break;
1862
1863 case FSF_REQUEST_SIZE_TOO_LARGE:
1864 ZFCP_LOG_INFO(
1865 "Length of the ELS request buffer, "
1866 "specified in QTCB bottom, "
1867 "exceeds the size of the buffers "
1868 "that have been allocated for ELS request data "
1869 "(adapter: %s, req_buf_length=%d)\n",
1870 zfcp_get_busid_by_adapter(adapter),
1871 bottom->req_buf_length);
1872 break;
1873
1874 case FSF_RESPONSE_SIZE_TOO_LARGE:
1875 ZFCP_LOG_INFO(
1876 "Length of the ELS response buffer, "
1877 "specified in QTCB bottom, "
1878 "exceeds the size of the buffers "
1879 "that have been allocated for ELS response data "
1880 "(adapter: %s, resp_buf_length=%d)\n",
1881 zfcp_get_busid_by_adapter(adapter),
1882 bottom->resp_buf_length);
1883 break;
1884
1885 case FSF_SBAL_MISMATCH:
1886 /* should never occure, avoided in zfcp_fsf_send_els */
1887 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1888 "resp_buf_length=%d)\n",
1889 zfcp_get_busid_by_adapter(adapter),
1890 bottom->req_buf_length, bottom->resp_buf_length);
1891 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1892 break;
1893
1894 case FSF_ACCESS_DENIED:
1895 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1896 "(adapter %s, port d_id=0x%06x)\n",
1897 zfcp_get_busid_by_adapter(adapter), d_id);
1898 for (counter = 0; counter < 2; counter++) {
1899 subtable = header->fsf_status_qual.halfword[counter * 2];
1900 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1901 switch (subtable) {
1902 case FSF_SQ_CFDC_SUBTABLE_OS:
1903 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1904 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1905 case FSF_SQ_CFDC_SUBTABLE_LUN:
1906 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1907 zfcp_act_subtable_type[subtable], rule);
1908 break;
1909 }
1910 }
1911 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1912 if (port != NULL)
1913 zfcp_erp_port_access_denied(port);
1914 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915 break;
1916
1917 default:
1918 ZFCP_LOG_NORMAL(
1919 "bug: An unknown FSF Status was presented "
1920 "(adapter: %s, fsf_status=0x%08x)\n",
1921 zfcp_get_busid_by_adapter(adapter),
1922 header->fsf_status);
1923 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1924 debug_exception(adapter->erp_dbf, 0,
1925 &header->fsf_status_qual.word[0], sizeof(u32));
1926 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1927 break;
1928 }
1929
1930 skip_fsfstatus:
1931 send_els->status = retval;
1932
1933 if (send_els->handler)
1934 send_els->handler(send_els->handler_data);
1935
1936 return retval;
1937 }
1938
1939 int
1940 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1941 {
1942 volatile struct qdio_buffer_element *sbale;
1943 struct zfcp_fsf_req *fsf_req;
1944 struct zfcp_adapter *adapter = erp_action->adapter;
1945 unsigned long lock_flags;
1946 int retval;
1947
1948 /* setup new FSF request */
1949 retval = zfcp_fsf_req_create(adapter,
1950 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1951 ZFCP_REQ_AUTO_CLEANUP,
1952 adapter->pool.fsf_req_erp,
1953 &lock_flags, &fsf_req);
1954 if (retval) {
1955 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1956 "data request for adapter %s.\n",
1957 zfcp_get_busid_by_adapter(adapter));
1958 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1959 lock_flags);
1960 return retval;
1961 }
1962
1963 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1964 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1965 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1966
1967 fsf_req->qtcb->bottom.config.feature_selection =
1968 FSF_FEATURE_CFDC |
1969 FSF_FEATURE_LUN_SHARING |
1970 FSF_FEATURE_NOTIFICATION_LOST |
1971 FSF_FEATURE_UPDATE_ALERT;
1972 fsf_req->erp_action = erp_action;
1973 erp_action->fsf_req = fsf_req;
1974
1975 zfcp_erp_start_timer(fsf_req);
1976 retval = zfcp_fsf_req_send(fsf_req);
1977 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1978 lock_flags);
1979 if (retval) {
1980 ZFCP_LOG_INFO("error: Could not send exchange configuration "
1981 "data command on the adapter %s\n",
1982 zfcp_get_busid_by_adapter(adapter));
1983 zfcp_fsf_req_free(fsf_req);
1984 erp_action->fsf_req = NULL;
1985 }
1986 else
1987 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1988 "(adapter %s)\n",
1989 zfcp_get_busid_by_adapter(adapter));
1990
1991 return retval;
1992 }
1993
1994 int
1995 zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1996 struct fsf_qtcb_bottom_config *data)
1997 {
1998 volatile struct qdio_buffer_element *sbale;
1999 struct zfcp_fsf_req *fsf_req;
2000 unsigned long lock_flags;
2001 int retval;
2002
2003 /* setup new FSF request */
2004 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
2005 0, NULL, &lock_flags, &fsf_req);
2006 if (retval) {
2007 ZFCP_LOG_INFO("error: Could not create exchange configuration "
2008 "data request for adapter %s.\n",
2009 zfcp_get_busid_by_adapter(adapter));
2010 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2011 lock_flags);
2012 return retval;
2013 }
2014
2015 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2016 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2017 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2018
2019 fsf_req->qtcb->bottom.config.feature_selection =
2020 FSF_FEATURE_CFDC |
2021 FSF_FEATURE_LUN_SHARING |
2022 FSF_FEATURE_NOTIFICATION_LOST |
2023 FSF_FEATURE_UPDATE_ALERT;
2024
2025 if (data)
2026 fsf_req->data = (unsigned long) data;
2027
2028 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2029 retval = zfcp_fsf_req_send(fsf_req);
2030 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2031 lock_flags);
2032 if (retval)
2033 ZFCP_LOG_INFO("error: Could not send exchange configuration "
2034 "data command on the adapter %s\n",
2035 zfcp_get_busid_by_adapter(adapter));
2036 else
2037 wait_event(fsf_req->completion_wq,
2038 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2039
2040 zfcp_fsf_req_free(fsf_req);
2041
2042 return retval;
2043 }
2044
2045 /**
2046 * zfcp_fsf_exchange_config_evaluate
2047 * @fsf_req: fsf_req which belongs to xchg config data request
2048 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2049 *
2050 * returns: -EIO on error, 0 otherwise
2051 */
2052 static int
2053 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2054 {
2055 struct fsf_qtcb_bottom_config *bottom;
2056 struct zfcp_adapter *adapter = fsf_req->adapter;
2057 struct Scsi_Host *shost = adapter->scsi_host;
2058
2059 bottom = &fsf_req->qtcb->bottom.config;
2060 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2061 bottom->low_qtcb_version, bottom->high_qtcb_version);
2062 adapter->fsf_lic_version = bottom->lic_version;
2063 adapter->adapter_features = bottom->adapter_features;
2064 adapter->connection_features = bottom->connection_features;
2065 adapter->peer_wwpn = 0;
2066 adapter->peer_wwnn = 0;
2067 adapter->peer_d_id = 0;
2068
2069 if (xchg_ok) {
2070
2071 if (fsf_req->data)
2072 memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
2073 bottom, sizeof (struct fsf_qtcb_bottom_config));
2074
2075 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
2076 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
2077 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
2078 fc_host_speed(shost) = bottom->fc_link_speed;
2079 fc_host_supported_classes(shost) =
2080 FC_COS_CLASS2 | FC_COS_CLASS3;
2081 adapter->hydra_version = bottom->adapter_type;
2082 if (fc_host_permanent_port_name(shost) == -1)
2083 fc_host_permanent_port_name(shost) =
2084 fc_host_port_name(shost);
2085 if (bottom->fc_topology == FSF_TOPO_P2P) {
2086 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2087 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2088 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2089 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
2090 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
2091 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
2092 else if (bottom->fc_topology == FSF_TOPO_AL)
2093 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
2094 else
2095 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
2096 } else {
2097 fc_host_node_name(shost) = 0;
2098 fc_host_port_name(shost) = 0;
2099 fc_host_port_id(shost) = 0;
2100 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
2101 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
2102 adapter->hydra_version = 0;
2103 }
2104
2105 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
2106 adapter->hardware_version = bottom->hardware_version;
2107 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2108 min(FC_SERIAL_NUMBER_SIZE, 17));
2109 EBCASC(fc_host_serial_number(shost),
2110 min(FC_SERIAL_NUMBER_SIZE, 17));
2111 }
2112
2113 ZFCP_LOG_NORMAL("The adapter %s reported the following "
2114 "characteristics:\n"
2115 "WWNN 0x%016Lx, "
2116 "WWPN 0x%016Lx, "
2117 "S_ID 0x%06x,\n"
2118 "adapter version 0x%x, "
2119 "LIC version 0x%x, "
2120 "FC link speed %d Gb/s\n",
2121 zfcp_get_busid_by_adapter(adapter),
2122 (wwn_t) fc_host_node_name(shost),
2123 (wwn_t) fc_host_port_name(shost),
2124 fc_host_port_id(shost),
2125 adapter->hydra_version,
2126 adapter->fsf_lic_version,
2127 fc_host_speed(shost));
2128 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2129 ZFCP_LOG_NORMAL("error: the adapter %s "
2130 "only supports newer control block "
2131 "versions in comparison to this device "
2132 "driver (try updated device driver)\n",
2133 zfcp_get_busid_by_adapter(adapter));
2134 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2135 zfcp_erp_adapter_shutdown(adapter, 0);
2136 return -EIO;
2137 }
2138 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2139 ZFCP_LOG_NORMAL("error: the adapter %s "
2140 "only supports older control block "
2141 "versions than this device driver uses"
2142 "(consider a microcode upgrade)\n",
2143 zfcp_get_busid_by_adapter(adapter));
2144 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2145 zfcp_erp_adapter_shutdown(adapter, 0);
2146 return -EIO;
2147 }
2148 return 0;
2149 }
2150
2151 /**
2152 * function: zfcp_fsf_exchange_config_data_handler
2153 *
2154 * purpose: is called for finished Exchange Configuration Data command
2155 *
2156 * returns:
2157 */
2158 static int
2159 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2160 {
2161 struct fsf_qtcb_bottom_config *bottom;
2162 struct zfcp_adapter *adapter = fsf_req->adapter;
2163 struct fsf_qtcb *qtcb = fsf_req->qtcb;
2164
2165 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2166 return -EIO;
2167
2168 switch (qtcb->header.fsf_status) {
2169
2170 case FSF_GOOD:
2171 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2172 return -EIO;
2173
2174 switch (fc_host_port_type(adapter->scsi_host)) {
2175 case FC_PORTTYPE_PTP:
2176 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2177 "configuration detected at adapter %s\n"
2178 "Peer WWNN 0x%016llx, "
2179 "peer WWPN 0x%016llx, "
2180 "peer d_id 0x%06x\n",
2181 zfcp_get_busid_by_adapter(adapter),
2182 adapter->peer_wwnn,
2183 adapter->peer_wwpn,
2184 adapter->peer_d_id);
2185 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2186 "top-p-to-p");
2187 break;
2188 case FC_PORTTYPE_NLPORT:
2189 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2190 "topology detected at adapter %s "
2191 "unsupported, shutting down adapter\n",
2192 zfcp_get_busid_by_adapter(adapter));
2193 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2194 "top-al");
2195 zfcp_erp_adapter_shutdown(adapter, 0);
2196 return -EIO;
2197 case FC_PORTTYPE_NPORT:
2198 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
2199 "network detected at adapter %s.\n",
2200 zfcp_get_busid_by_adapter(adapter));
2201 break;
2202 default:
2203 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2204 "reported by the exchange "
2205 "configuration command for "
2206 "the adapter %s is not "
2207 "of a type known to the zfcp "
2208 "driver, shutting down adapter\n",
2209 zfcp_get_busid_by_adapter(adapter));
2210 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2211 "unknown-topo");
2212 zfcp_erp_adapter_shutdown(adapter, 0);
2213 return -EIO;
2214 }
2215 bottom = &qtcb->bottom.config;
2216 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2217 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2218 "allowed by the adapter %s "
2219 "is lower than the minimum "
2220 "required by the driver (%ld bytes).\n",
2221 bottom->max_qtcb_size,
2222 zfcp_get_busid_by_adapter(adapter),
2223 sizeof(struct fsf_qtcb));
2224 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2225 "qtcb-size");
2226 debug_event(fsf_req->adapter->erp_dbf, 0,
2227 &bottom->max_qtcb_size, sizeof (u32));
2228 zfcp_erp_adapter_shutdown(adapter, 0);
2229 return -EIO;
2230 }
2231 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2232 &adapter->status);
2233 break;
2234 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2235 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2236
2237 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2238 return -EIO;
2239
2240 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2241 &adapter->status);
2242
2243 zfcp_fsf_link_down_info_eval(adapter,
2244 &qtcb->header.fsf_status_qual.link_down_info);
2245 break;
2246 default:
2247 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2248 debug_event(fsf_req->adapter->erp_dbf, 0,
2249 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2250 zfcp_erp_adapter_shutdown(adapter, 0);
2251 return -EIO;
2252 }
2253 return 0;
2254 }
2255
2256 /**
2257 * zfcp_fsf_exchange_port_data - request information about local port
2258 * @erp_action: ERP action for the adapter for which port data is requested
2259 */
2260 int
2261 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
2262 {
2263 volatile struct qdio_buffer_element *sbale;
2264 struct zfcp_fsf_req *fsf_req;
2265 struct zfcp_adapter *adapter = erp_action->adapter;
2266 unsigned long lock_flags;
2267 int retval;
2268
2269 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2270 ZFCP_LOG_INFO("error: exchange port data "
2271 "command not supported by adapter %s\n",
2272 zfcp_get_busid_by_adapter(adapter));
2273 return -EOPNOTSUPP;
2274 }
2275
2276 /* setup new FSF request */
2277 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2278 ZFCP_REQ_AUTO_CLEANUP,
2279 adapter->pool.fsf_req_erp,
2280 &lock_flags, &fsf_req);
2281 if (retval) {
2282 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2283 "exchange port data request for"
2284 "the adapter %s.\n",
2285 zfcp_get_busid_by_adapter(adapter));
2286 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2287 lock_flags);
2288 return retval;
2289 }
2290
2291 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2292 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2293 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2294
2295 erp_action->fsf_req = fsf_req;
2296 fsf_req->erp_action = erp_action;
2297 zfcp_erp_start_timer(fsf_req);
2298
2299 retval = zfcp_fsf_req_send(fsf_req);
2300 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2301
2302 if (retval) {
2303 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2304 "command on the adapter %s\n",
2305 zfcp_get_busid_by_adapter(adapter));
2306 zfcp_fsf_req_free(fsf_req);
2307 erp_action->fsf_req = NULL;
2308 }
2309 else
2310 ZFCP_LOG_DEBUG("exchange port data request initiated "
2311 "(adapter %s)\n",
2312 zfcp_get_busid_by_adapter(adapter));
2313 return retval;
2314 }
2315
2316
2317 /**
2318 * zfcp_fsf_exchange_port_data_sync - request information about local port
2319 * and wait until information is ready
2320 */
2321 int
2322 zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
2323 struct fsf_qtcb_bottom_port *data)
2324 {
2325 volatile struct qdio_buffer_element *sbale;
2326 struct zfcp_fsf_req *fsf_req;
2327 unsigned long lock_flags;
2328 int retval;
2329
2330 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2331 ZFCP_LOG_INFO("error: exchange port data "
2332 "command not supported by adapter %s\n",
2333 zfcp_get_busid_by_adapter(adapter));
2334 return -EOPNOTSUPP;
2335 }
2336
2337 /* setup new FSF request */
2338 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2339 0, NULL, &lock_flags, &fsf_req);
2340 if (retval) {
2341 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2342 "exchange port data request for"
2343 "the adapter %s.\n",
2344 zfcp_get_busid_by_adapter(adapter));
2345 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2346 lock_flags);
2347 return retval;
2348 }
2349
2350 if (data)
2351 fsf_req->data = (unsigned long) data;
2352
2353 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2354 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2355 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2356
2357 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2358 retval = zfcp_fsf_req_send(fsf_req);
2359 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2360
2361 if (retval)
2362 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2363 "command on the adapter %s\n",
2364 zfcp_get_busid_by_adapter(adapter));
2365 else
2366 wait_event(fsf_req->completion_wq,
2367 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2368
2369 zfcp_fsf_req_free(fsf_req);
2370
2371 return retval;
2372 }
2373
2374 /**
2375 * zfcp_fsf_exchange_port_evaluate
2376 * @fsf_req: fsf_req which belongs to xchg port data request
2377 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
2378 */
2379 static void
2380 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2381 {
2382 struct zfcp_adapter *adapter;
2383 struct fsf_qtcb_bottom_port *bottom;
2384 struct Scsi_Host *shost;
2385
2386 adapter = fsf_req->adapter;
2387 bottom = &fsf_req->qtcb->bottom.port;
2388 shost = adapter->scsi_host;
2389
2390 if (fsf_req->data)
2391 memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
2392 sizeof(struct fsf_qtcb_bottom_port));
2393
2394 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
2395 fc_host_permanent_port_name(shost) = bottom->wwpn;
2396 else
2397 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
2398 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
2399 fc_host_supported_speeds(shost) = bottom->supported_speed;
2400 }
2401
2402 /**
2403 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2404 * @fsf_req: pointer to struct zfcp_fsf_req
2405 */
2406 static void
2407 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2408 {
2409 struct zfcp_adapter *adapter;
2410 struct fsf_qtcb *qtcb;
2411
2412 adapter = fsf_req->adapter;
2413 qtcb = fsf_req->qtcb;
2414
2415 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2416 return;
2417
2418 switch (qtcb->header.fsf_status) {
2419 case FSF_GOOD:
2420 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
2421 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2422 break;
2423 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2424 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
2425 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2426 zfcp_fsf_link_down_info_eval(adapter,
2427 &qtcb->header.fsf_status_qual.link_down_info);
2428 break;
2429 default:
2430 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");
2431 debug_event(adapter->erp_dbf, 0,
2432 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2433 }
2434 }
2435
2436
2437 /*
2438 * function: zfcp_fsf_open_port
2439 *
2440 * purpose:
2441 *
2442 * returns: address of initiated FSF request
2443 * NULL - request could not be initiated
2444 */
2445 int
2446 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2447 {
2448 volatile struct qdio_buffer_element *sbale;
2449 struct zfcp_fsf_req *fsf_req;
2450 unsigned long lock_flags;
2451 int retval = 0;
2452
2453 /* setup new FSF request */
2454 retval = zfcp_fsf_req_create(erp_action->adapter,
2455 FSF_QTCB_OPEN_PORT_WITH_DID,
2456 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2457 erp_action->adapter->pool.fsf_req_erp,
2458 &lock_flags, &fsf_req);
2459 if (retval < 0) {
2460 ZFCP_LOG_INFO("error: Could not create open port request "
2461 "for port 0x%016Lx on adapter %s.\n",
2462 erp_action->port->wwpn,
2463 zfcp_get_busid_by_adapter(erp_action->adapter));
2464 goto out;
2465 }
2466
2467 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2468 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2469 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2470
2471 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2472 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2473 fsf_req->data = (unsigned long) erp_action->port;
2474 fsf_req->erp_action = erp_action;
2475 erp_action->fsf_req = fsf_req;
2476
2477 zfcp_erp_start_timer(fsf_req);
2478 retval = zfcp_fsf_req_send(fsf_req);
2479 if (retval) {
2480 ZFCP_LOG_INFO("error: Could not send open port request for "
2481 "port 0x%016Lx on adapter %s.\n",
2482 erp_action->port->wwpn,
2483 zfcp_get_busid_by_adapter(erp_action->adapter));
2484 zfcp_fsf_req_free(fsf_req);
2485 erp_action->fsf_req = NULL;
2486 goto out;
2487 }
2488
2489 ZFCP_LOG_DEBUG("open port request initiated "
2490 "(adapter %s, port 0x%016Lx)\n",
2491 zfcp_get_busid_by_adapter(erp_action->adapter),
2492 erp_action->port->wwpn);
2493 out:
2494 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2495 lock_flags);
2496 return retval;
2497 }
2498
2499 /*
2500 * function: zfcp_fsf_open_port_handler
2501 *
2502 * purpose: is called for finished Open Port command
2503 *
2504 * returns:
2505 */
2506 static int
2507 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2508 {
2509 int retval = -EINVAL;
2510 struct zfcp_port *port;
2511 struct fsf_plogi *plogi;
2512 struct fsf_qtcb_header *header;
2513 u16 subtable, rule, counter;
2514
2515 port = (struct zfcp_port *) fsf_req->data;
2516 header = &fsf_req->qtcb->header;
2517
2518 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2519 /* don't change port status in our bookkeeping */
2520 goto skip_fsfstatus;
2521 }
2522
2523 /* evaluate FSF status in QTCB */
2524 switch (header->fsf_status) {
2525
2526 case FSF_PORT_ALREADY_OPEN:
2527 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2528 "is already open.\n",
2529 port->wwpn, zfcp_get_busid_by_port(port));
2530 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2531 "fsf_s_popen");
2532 /*
2533 * This is a bug, however operation should continue normally
2534 * if it is simply ignored
2535 */
2536 break;
2537
2538 case FSF_ACCESS_DENIED:
2539 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2540 "on adapter %s\n",
2541 port->wwpn, zfcp_get_busid_by_port(port));
2542 for (counter = 0; counter < 2; counter++) {
2543 subtable = header->fsf_status_qual.halfword[counter * 2];
2544 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2545 switch (subtable) {
2546 case FSF_SQ_CFDC_SUBTABLE_OS:
2547 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2548 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2549 case FSF_SQ_CFDC_SUBTABLE_LUN:
2550 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2551 zfcp_act_subtable_type[subtable], rule);
2552 break;
2553 }
2554 }
2555 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2556 zfcp_erp_port_access_denied(port);
2557 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2558 break;
2559
2560 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2561 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2562 "The remote port 0x%016Lx on adapter %s "
2563 "could not be opened. Disabling it.\n",
2564 port->wwpn, zfcp_get_busid_by_port(port));
2565 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2566 "fsf_s_max_ports");
2567 zfcp_erp_port_failed(port);
2568 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2569 break;
2570
2571 case FSF_ADAPTER_STATUS_AVAILABLE:
2572 switch (header->fsf_status_qual.word[0]) {
2573 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2574 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2575 "fsf_sq_ltest");
2576 /* ERP strategy will escalate */
2577 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2578 break;
2579 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2580 /* ERP strategy will escalate */
2581 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2582 "fsf_sq_ulp");
2583 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2584 break;
2585 case FSF_SQ_NO_RETRY_POSSIBLE:
2586 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2587 "adapter %s could not be opened. "
2588 "Disabling it.\n",
2589 port->wwpn,
2590 zfcp_get_busid_by_port(port));
2591 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2592 "fsf_sq_no_retry");
2593 zfcp_erp_port_failed(port);
2594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2595 break;
2596 default:
2597 ZFCP_LOG_NORMAL
2598 ("bug: Wrong status qualifier 0x%x arrived.\n",
2599 header->fsf_status_qual.word[0]);
2600 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2601 "fsf_sq_inval:");
2602 debug_exception(
2603 fsf_req->adapter->erp_dbf, 0,
2604 &header->fsf_status_qual.word[0],
2605 sizeof (u32));
2606 break;
2607 }
2608 break;
2609
2610 case FSF_GOOD:
2611 /* save port handle assigned by FSF */
2612 port->handle = header->port_handle;
2613 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2614 "was opened, it's port handle is 0x%x\n",
2615 port->wwpn, zfcp_get_busid_by_port(port),
2616 port->handle);
2617 /* mark port as open */
2618 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2619 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2620 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2621 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2622 &port->status);
2623 retval = 0;
2624 /* check whether D_ID has changed during open */
2625 /*
2626 * FIXME: This check is not airtight, as the FCP channel does
2627 * not monitor closures of target port connections caused on
2628 * the remote side. Thus, they might miss out on invalidating
2629 * locally cached WWPNs (and other N_Port parameters) of gone
2630 * target ports. So, our heroic attempt to make things safe
2631 * could be undermined by 'open port' response data tagged with
2632 * obsolete WWPNs. Another reason to monitor potential
2633 * connection closures ourself at least (by interpreting
2634 * incoming ELS' and unsolicited status). It just crosses my
2635 * mind that one should be able to cross-check by means of
2636 * another GID_PN straight after a port has been opened.
2637 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2638 */
2639 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2640 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2641 {
2642 if (fsf_req->qtcb->bottom.support.els1_length <
2643 sizeof (struct fsf_plogi)) {
2644 ZFCP_LOG_INFO(
2645 "warning: insufficient length of "
2646 "PLOGI payload (%i)\n",
2647 fsf_req->qtcb->bottom.support.els1_length);
2648 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2649 "fsf_s_short_plogi:");
2650 /* skip sanity check and assume wwpn is ok */
2651 } else {
2652 if (plogi->serv_param.wwpn != port->wwpn) {
2653 ZFCP_LOG_INFO("warning: d_id of port "
2654 "0x%016Lx changed during "
2655 "open\n", port->wwpn);
2656 debug_text_event(
2657 fsf_req->adapter->erp_dbf, 0,
2658 "fsf_s_did_change:");
2659 atomic_clear_mask(
2660 ZFCP_STATUS_PORT_DID_DID,
2661 &port->status);
2662 } else {
2663 port->wwnn = plogi->serv_param.wwnn;
2664 zfcp_plogi_evaluate(port, plogi);
2665 }
2666 }
2667 }
2668 break;
2669
2670 case FSF_UNKNOWN_OP_SUBTYPE:
2671 /* should never occure, subtype not set in zfcp_fsf_open_port */
2672 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2673 "op_subtype=0x%x)\n",
2674 zfcp_get_busid_by_port(port),
2675 fsf_req->qtcb->bottom.support.operation_subtype);
2676 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2677 break;
2678
2679 default:
2680 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2681 "(debug info 0x%x)\n",
2682 header->fsf_status);
2683 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2684 debug_exception(fsf_req->adapter->erp_dbf, 0,
2685 &header->fsf_status, sizeof (u32));
2686 break;
2687 }
2688
2689 skip_fsfstatus:
2690 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2691 return retval;
2692 }
2693
2694 /*
2695 * function: zfcp_fsf_close_port
2696 *
2697 * purpose: submit FSF command "close port"
2698 *
2699 * returns: address of initiated FSF request
2700 * NULL - request could not be initiated
2701 */
2702 int
2703 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2704 {
2705 volatile struct qdio_buffer_element *sbale;
2706 struct zfcp_fsf_req *fsf_req;
2707 unsigned long lock_flags;
2708 int retval = 0;
2709
2710 /* setup new FSF request */
2711 retval = zfcp_fsf_req_create(erp_action->adapter,
2712 FSF_QTCB_CLOSE_PORT,
2713 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2714 erp_action->adapter->pool.fsf_req_erp,
2715 &lock_flags, &fsf_req);
2716 if (retval < 0) {
2717 ZFCP_LOG_INFO("error: Could not create a close port request "
2718 "for port 0x%016Lx on adapter %s.\n",
2719 erp_action->port->wwpn,
2720 zfcp_get_busid_by_adapter(erp_action->adapter));
2721 goto out;
2722 }
2723
2724 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2725 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2726 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2727
2728 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2729 fsf_req->data = (unsigned long) erp_action->port;
2730 fsf_req->erp_action = erp_action;
2731 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2732 fsf_req->erp_action = erp_action;
2733 erp_action->fsf_req = fsf_req;
2734
2735 zfcp_erp_start_timer(fsf_req);
2736 retval = zfcp_fsf_req_send(fsf_req);
2737 if (retval) {
2738 ZFCP_LOG_INFO("error: Could not send a close port request for "
2739 "port 0x%016Lx on adapter %s.\n",
2740 erp_action->port->wwpn,
2741 zfcp_get_busid_by_adapter(erp_action->adapter));
2742 zfcp_fsf_req_free(fsf_req);
2743 erp_action->fsf_req = NULL;
2744 goto out;
2745 }
2746
2747 ZFCP_LOG_TRACE("close port request initiated "
2748 "(adapter %s, port 0x%016Lx)\n",
2749 zfcp_get_busid_by_adapter(erp_action->adapter),
2750 erp_action->port->wwpn);
2751 out:
2752 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2753 lock_flags);
2754 return retval;
2755 }
2756
2757 /*
2758 * function: zfcp_fsf_close_port_handler
2759 *
2760 * purpose: is called for finished Close Port FSF command
2761 *
2762 * returns:
2763 */
2764 static int
2765 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2766 {
2767 int retval = -EINVAL;
2768 struct zfcp_port *port;
2769
2770 port = (struct zfcp_port *) fsf_req->data;
2771
2772 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2773 /* don't change port status in our bookkeeping */
2774 goto skip_fsfstatus;
2775 }
2776
2777 /* evaluate FSF status in QTCB */
2778 switch (fsf_req->qtcb->header.fsf_status) {
2779
2780 case FSF_PORT_HANDLE_NOT_VALID:
2781 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2782 "0x%016Lx on adapter %s invalid. This may happen "
2783 "occasionally.\n", port->handle,
2784 port->wwpn, zfcp_get_busid_by_port(port));
2785 ZFCP_LOG_DEBUG("status qualifier:\n");
2786 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2787 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2788 sizeof (union fsf_status_qual));
2789 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2790 "fsf_s_phand_nv");
2791 zfcp_erp_adapter_reopen(port->adapter, 0);
2792 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2793 break;
2794
2795 case FSF_ADAPTER_STATUS_AVAILABLE:
2796 /* Note: FSF has actually closed the port in this case.
2797 * The status code is just daft. Fingers crossed for a change
2798 */
2799 retval = 0;
2800 break;
2801
2802 case FSF_GOOD:
2803 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2804 "port handle 0x%x\n", port->wwpn,
2805 zfcp_get_busid_by_port(port), port->handle);
2806 zfcp_erp_modify_port_status(port,
2807 ZFCP_STATUS_COMMON_OPEN,
2808 ZFCP_CLEAR);
2809 retval = 0;
2810 break;
2811
2812 default:
2813 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2814 "(debug info 0x%x)\n",
2815 fsf_req->qtcb->header.fsf_status);
2816 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2817 debug_exception(fsf_req->adapter->erp_dbf, 0,
2818 &fsf_req->qtcb->header.fsf_status,
2819 sizeof (u32));
2820 break;
2821 }
2822
2823 skip_fsfstatus:
2824 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2825 return retval;
2826 }
2827
2828 /*
2829 * function: zfcp_fsf_close_physical_port
2830 *
2831 * purpose: submit FSF command "close physical port"
2832 *
2833 * returns: address of initiated FSF request
2834 * NULL - request could not be initiated
2835 */
2836 int
2837 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2838 {
2839 volatile struct qdio_buffer_element *sbale;
2840 struct zfcp_fsf_req *fsf_req;
2841 unsigned long lock_flags;
2842 int retval = 0;
2843
2844 /* setup new FSF request */
2845 retval = zfcp_fsf_req_create(erp_action->adapter,
2846 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2847 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2848 erp_action->adapter->pool.fsf_req_erp,
2849 &lock_flags, &fsf_req);
2850 if (retval < 0) {
2851 ZFCP_LOG_INFO("error: Could not create close physical port "
2852 "request (adapter %s, port 0x%016Lx)\n",
2853 zfcp_get_busid_by_adapter(erp_action->adapter),
2854 erp_action->port->wwpn);
2855
2856 goto out;
2857 }
2858
2859 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2860 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2861 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2862
2863 /* mark port as being closed */
2864 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2865 &erp_action->port->status);
2866 /* save a pointer to this port */
2867 fsf_req->data = (unsigned long) erp_action->port;
2868 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2869 fsf_req->erp_action = erp_action;
2870 erp_action->fsf_req = fsf_req;
2871
2872 zfcp_erp_start_timer(fsf_req);
2873 retval = zfcp_fsf_req_send(fsf_req);
2874 if (retval) {
2875 ZFCP_LOG_INFO("error: Could not send close physical port "
2876 "request (adapter %s, port 0x%016Lx)\n",
2877 zfcp_get_busid_by_adapter(erp_action->adapter),
2878 erp_action->port->wwpn);
2879 zfcp_fsf_req_free(fsf_req);
2880 erp_action->fsf_req = NULL;
2881 goto out;
2882 }
2883
2884 ZFCP_LOG_TRACE("close physical port request initiated "
2885 "(adapter %s, port 0x%016Lx)\n",
2886 zfcp_get_busid_by_adapter(erp_action->adapter),
2887 erp_action->port->wwpn);
2888 out:
2889 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2890 lock_flags);
2891 return retval;
2892 }
2893
2894 /*
2895 * function: zfcp_fsf_close_physical_port_handler
2896 *
2897 * purpose: is called for finished Close Physical Port FSF command
2898 *
2899 * returns:
2900 */
2901 static int
2902 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2903 {
2904 int retval = -EINVAL;
2905 struct zfcp_port *port;
2906 struct zfcp_unit *unit;
2907 struct fsf_qtcb_header *header;
2908 u16 subtable, rule, counter;
2909
2910 port = (struct zfcp_port *) fsf_req->data;
2911 header = &fsf_req->qtcb->header;
2912
2913 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2914 /* don't change port status in our bookkeeping */
2915 goto skip_fsfstatus;
2916 }
2917
2918 /* evaluate FSF status in QTCB */
2919 switch (header->fsf_status) {
2920
2921 case FSF_PORT_HANDLE_NOT_VALID:
2922 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2923 "(adapter %s, port 0x%016Lx). "
2924 "This may happen occasionally.\n",
2925 port->handle,
2926 zfcp_get_busid_by_port(port),
2927 port->wwpn);
2928 ZFCP_LOG_DEBUG("status qualifier:\n");
2929 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2930 (char *) &header->fsf_status_qual,
2931 sizeof (union fsf_status_qual));
2932 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2933 "fsf_s_phand_nv");
2934 zfcp_erp_adapter_reopen(port->adapter, 0);
2935 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2936 break;
2937
2938 case FSF_ACCESS_DENIED:
2939 ZFCP_LOG_NORMAL("Access denied, cannot close "
2940 "physical port 0x%016Lx on adapter %s\n",
2941 port->wwpn, zfcp_get_busid_by_port(port));
2942 for (counter = 0; counter < 2; counter++) {
2943 subtable = header->fsf_status_qual.halfword[counter * 2];
2944 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2945 switch (subtable) {
2946 case FSF_SQ_CFDC_SUBTABLE_OS:
2947 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2948 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2949 case FSF_SQ_CFDC_SUBTABLE_LUN:
2950 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2951 zfcp_act_subtable_type[subtable], rule);
2952 break;
2953 }
2954 }
2955 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2956 zfcp_erp_port_access_denied(port);
2957 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2958 break;
2959
2960 case FSF_PORT_BOXED:
2961 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2962 "%s needs to be reopened but it was attempted "
2963 "to close it physically.\n",
2964 port->wwpn,
2965 zfcp_get_busid_by_port(port));
2966 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2967 zfcp_erp_port_boxed(port);
2968 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2969 ZFCP_STATUS_FSFREQ_RETRY;
2970 break;
2971
2972 case FSF_ADAPTER_STATUS_AVAILABLE:
2973 switch (header->fsf_status_qual.word[0]) {
2974 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2975 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2976 "fsf_sq_ltest");
2977 /* This will now be escalated by ERP */
2978 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2979 break;
2980 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2981 /* ERP strategy will escalate */
2982 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2983 "fsf_sq_ulp");
2984 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2985 break;
2986 default:
2987 ZFCP_LOG_NORMAL
2988 ("bug: Wrong status qualifier 0x%x arrived.\n",
2989 header->fsf_status_qual.word[0]);
2990 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2991 "fsf_sq_inval:");
2992 debug_exception(
2993 fsf_req->adapter->erp_dbf, 0,
2994 &header->fsf_status_qual.word[0], sizeof (u32));
2995 break;
2996 }
2997 break;
2998
2999 case FSF_GOOD:
3000 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
3001 "physically closed, port handle 0x%x\n",
3002 port->wwpn,
3003 zfcp_get_busid_by_port(port), port->handle);
3004 /* can't use generic zfcp_erp_modify_port_status because
3005 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
3006 */
3007 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
3008 list_for_each_entry(unit, &port->unit_list_head, list)
3009 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3010 retval = 0;
3011 break;
3012
3013 default:
3014 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3015 "(debug info 0x%x)\n",
3016 header->fsf_status);
3017 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3018 debug_exception(fsf_req->adapter->erp_dbf, 0,
3019 &header->fsf_status, sizeof (u32));
3020 break;
3021 }
3022
3023 skip_fsfstatus:
3024 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
3025 return retval;
3026 }
3027
3028 /*
3029 * function: zfcp_fsf_open_unit
3030 *
3031 * purpose:
3032 *
3033 * returns:
3034 *
3035 * assumptions: This routine does not check whether the associated
3036 * remote port has already been opened. This should be
3037 * done by calling routines. Otherwise some status
3038 * may be presented by FSF
3039 */
3040 int
3041 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
3042 {
3043 volatile struct qdio_buffer_element *sbale;
3044 struct zfcp_fsf_req *fsf_req;
3045 unsigned long lock_flags;
3046 int retval = 0;
3047
3048 /* setup new FSF request */
3049 retval = zfcp_fsf_req_create(erp_action->adapter,
3050 FSF_QTCB_OPEN_LUN,
3051 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3052 erp_action->adapter->pool.fsf_req_erp,
3053 &lock_flags, &fsf_req);
3054 if (retval < 0) {
3055 ZFCP_LOG_INFO("error: Could not create open unit request for "
3056 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3057 erp_action->unit->fcp_lun,
3058 erp_action->unit->port->wwpn,
3059 zfcp_get_busid_by_adapter(erp_action->adapter));
3060 goto out;
3061 }
3062
3063 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3064 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3065 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3066
3067 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3068 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
3069 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
3070 fsf_req->qtcb->bottom.support.option =
3071 FSF_OPEN_LUN_SUPPRESS_BOXING;
3072 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
3073 fsf_req->data = (unsigned long) erp_action->unit;
3074 fsf_req->erp_action = erp_action;
3075 erp_action->fsf_req = fsf_req;
3076
3077 zfcp_erp_start_timer(fsf_req);
3078 retval = zfcp_fsf_req_send(erp_action->fsf_req);
3079 if (retval) {
3080 ZFCP_LOG_INFO("error: Could not send an open unit request "
3081 "on the adapter %s, port 0x%016Lx for "
3082 "unit 0x%016Lx\n",
3083 zfcp_get_busid_by_adapter(erp_action->adapter),
3084 erp_action->port->wwpn,
3085 erp_action->unit->fcp_lun);
3086 zfcp_fsf_req_free(fsf_req);
3087 erp_action->fsf_req = NULL;
3088 goto out;
3089 }
3090
3091 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3092 "port 0x%016Lx, unit 0x%016Lx)\n",
3093 zfcp_get_busid_by_adapter(erp_action->adapter),
3094 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3095 out:
3096 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3097 lock_flags);
3098 return retval;
3099 }
3100
3101 /*
3102 * function: zfcp_fsf_open_unit_handler
3103 *
3104 * purpose: is called for finished Open LUN command
3105 *
3106 * returns:
3107 */
3108 static int
3109 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3110 {
3111 int retval = -EINVAL;
3112 struct zfcp_adapter *adapter;
3113 struct zfcp_unit *unit;
3114 struct fsf_qtcb_header *header;
3115 struct fsf_qtcb_bottom_support *bottom;
3116 struct fsf_queue_designator *queue_designator;
3117 u16 subtable, rule, counter;
3118 int exclusive, readwrite;
3119
3120 unit = (struct zfcp_unit *) fsf_req->data;
3121
3122 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3123 /* don't change unit status in our bookkeeping */
3124 goto skip_fsfstatus;
3125 }
3126
3127 adapter = fsf_req->adapter;
3128 header = &fsf_req->qtcb->header;
3129 bottom = &fsf_req->qtcb->bottom.support;
3130 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3131
3132 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3133 ZFCP_STATUS_COMMON_ACCESS_BOXED |
3134 ZFCP_STATUS_UNIT_SHARED |
3135 ZFCP_STATUS_UNIT_READONLY,
3136 &unit->status);
3137
3138 /* evaluate FSF status in QTCB */
3139 switch (header->fsf_status) {
3140
3141 case FSF_PORT_HANDLE_NOT_VALID:
3142 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3143 "for port 0x%016Lx on adapter %s invalid "
3144 "This may happen occasionally\n",
3145 unit->port->handle,
3146 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3147 ZFCP_LOG_DEBUG("status qualifier:\n");
3148 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3149 (char *) &header->fsf_status_qual,
3150 sizeof (union fsf_status_qual));
3151 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3152 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3153 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3154 break;
3155
3156 case FSF_LUN_ALREADY_OPEN:
3157 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3158 "remote port 0x%016Lx on adapter %s twice.\n",
3159 unit->fcp_lun,
3160 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3161 debug_text_exception(adapter->erp_dbf, 0,
3162 "fsf_s_uopen");
3163 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3164 break;
3165
3166 case FSF_ACCESS_DENIED:
3167 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3168 "remote port 0x%016Lx on adapter %s\n",
3169 unit->fcp_lun, unit->port->wwpn,
3170 zfcp_get_busid_by_unit(unit));
3171 for (counter = 0; counter < 2; counter++) {
3172 subtable = header->fsf_status_qual.halfword[counter * 2];
3173 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3174 switch (subtable) {
3175 case FSF_SQ_CFDC_SUBTABLE_OS:
3176 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3177 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3178 case FSF_SQ_CFDC_SUBTABLE_LUN:
3179 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3180 zfcp_act_subtable_type[subtable], rule);
3181 break;
3182 }
3183 }
3184 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3185 zfcp_erp_unit_access_denied(unit);
3186 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3187 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3188 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3189 break;
3190
3191 case FSF_PORT_BOXED:
3192 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3193 "needs to be reopened\n",
3194 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3195 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3196 zfcp_erp_port_boxed(unit->port);
3197 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3198 ZFCP_STATUS_FSFREQ_RETRY;
3199 break;
3200
3201 case FSF_LUN_SHARING_VIOLATION:
3202 if (header->fsf_status_qual.word[0] != 0) {
3203 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3204 "with WWPN 0x%Lx "
3205 "connected to the adapter %s "
3206 "is already in use in LPAR%d, CSS%d\n",
3207 unit->fcp_lun,
3208 unit->port->wwpn,
3209 zfcp_get_busid_by_unit(unit),
3210 queue_designator->hla,
3211 queue_designator->cssid);
3212 } else {
3213 subtable = header->fsf_status_qual.halfword[4];
3214 rule = header->fsf_status_qual.halfword[5];
3215 switch (subtable) {
3216 case FSF_SQ_CFDC_SUBTABLE_OS:
3217 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3218 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3219 case FSF_SQ_CFDC_SUBTABLE_LUN:
3220 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3221 "remote port with WWPN 0x%Lx "
3222 "connected to the adapter %s "
3223 "is denied (%s rule %d)\n",
3224 unit->fcp_lun,
3225 unit->port->wwpn,
3226 zfcp_get_busid_by_unit(unit),
3227 zfcp_act_subtable_type[subtable],
3228 rule);
3229 break;
3230 }
3231 }
3232 ZFCP_LOG_DEBUG("status qualifier:\n");
3233 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3234 (char *) &header->fsf_status_qual,
3235 sizeof (union fsf_status_qual));
3236 debug_text_event(adapter->erp_dbf, 2,
3237 "fsf_s_l_sh_vio");
3238 zfcp_erp_unit_access_denied(unit);
3239 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3240 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3241 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3242 break;
3243
3244 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3245 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3246 "There is no handle (temporary port identifier) "
3247 "available for unit 0x%016Lx on port 0x%016Lx "
3248 "on adapter %s\n",
3249 unit->fcp_lun,
3250 unit->port->wwpn,
3251 zfcp_get_busid_by_unit(unit));
3252 debug_text_event(adapter->erp_dbf, 1,
3253 "fsf_s_max_units");
3254 zfcp_erp_unit_failed(unit);
3255 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3256 break;
3257
3258 case FSF_ADAPTER_STATUS_AVAILABLE:
3259 switch (header->fsf_status_qual.word[0]) {
3260 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3261 /* Re-establish link to port */
3262 debug_text_event(adapter->erp_dbf, 1,
3263 "fsf_sq_ltest");
3264 zfcp_test_link(unit->port);
3265 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3266 break;
3267 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3268 /* ERP strategy will escalate */
3269 debug_text_event(adapter->erp_dbf, 1,
3270 "fsf_sq_ulp");
3271 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3272 break;
3273 default:
3274 ZFCP_LOG_NORMAL
3275 ("bug: Wrong status qualifier 0x%x arrived.\n",
3276 header->fsf_status_qual.word[0]);
3277 debug_text_event(adapter->erp_dbf, 0,
3278 "fsf_sq_inval:");
3279 debug_exception(adapter->erp_dbf, 0,
3280 &header->fsf_status_qual.word[0],
3281 sizeof (u32));
3282 }
3283 break;
3284
3285 case FSF_INVALID_COMMAND_OPTION:
3286 ZFCP_LOG_NORMAL(
3287 "Invalid option 0x%x has been specified "
3288 "in QTCB bottom sent to the adapter %s\n",
3289 bottom->option,
3290 zfcp_get_busid_by_adapter(adapter));
3291 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3292 retval = -EINVAL;
3293 break;
3294
3295 case FSF_GOOD:
3296 /* save LUN handle assigned by FSF */
3297 unit->handle = header->lun_handle;
3298 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3299 "adapter %s opened, port handle 0x%x\n",
3300 unit->fcp_lun,
3301 unit->port->wwpn,
3302 zfcp_get_busid_by_unit(unit),
3303 unit->handle);
3304 /* mark unit as open */
3305 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3306
3307 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3308 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3309 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3310 exclusive = (bottom->lun_access_info &
3311 FSF_UNIT_ACCESS_EXCLUSIVE);
3312 readwrite = (bottom->lun_access_info &
3313 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3314
3315 if (!exclusive)
3316 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3317 &unit->status);
3318
3319 if (!readwrite) {
3320 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3321 &unit->status);
3322 ZFCP_LOG_NORMAL("read-only access for unit "
3323 "(adapter %s, wwpn=0x%016Lx, "
3324 "fcp_lun=0x%016Lx)\n",
3325 zfcp_get_busid_by_unit(unit),
3326 unit->port->wwpn,
3327 unit->fcp_lun);
3328 }
3329
3330 if (exclusive && !readwrite) {
3331 ZFCP_LOG_NORMAL("exclusive access of read-only "
3332 "unit not supported\n");
3333 zfcp_erp_unit_failed(unit);
3334 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3335 zfcp_erp_unit_shutdown(unit, 0);
3336 } else if (!exclusive && readwrite) {
3337 ZFCP_LOG_NORMAL("shared access of read-write "
3338 "unit not supported\n");
3339 zfcp_erp_unit_failed(unit);
3340 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3341 zfcp_erp_unit_shutdown(unit, 0);
3342 }
3343 }
3344
3345 retval = 0;
3346 break;
3347
3348 default:
3349 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3350 "(debug info 0x%x)\n",
3351 header->fsf_status);
3352 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3353 debug_exception(adapter->erp_dbf, 0,
3354 &header->fsf_status, sizeof (u32));
3355 break;
3356 }
3357
3358 skip_fsfstatus:
3359 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3360 return retval;
3361 }
3362
3363 /*
3364 * function: zfcp_fsf_close_unit
3365 *
3366 * purpose:
3367 *
3368 * returns: address of fsf_req - request successfully initiated
3369 * NULL -
3370 *
3371 * assumptions: This routine does not check whether the associated
3372 * remote port/lun has already been opened. This should be
3373 * done by calling routines. Otherwise some status
3374 * may be presented by FSF
3375 */
3376 int
3377 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3378 {
3379 volatile struct qdio_buffer_element *sbale;
3380 struct zfcp_fsf_req *fsf_req;
3381 unsigned long lock_flags;
3382 int retval = 0;
3383
3384 /* setup new FSF request */
3385 retval = zfcp_fsf_req_create(erp_action->adapter,
3386 FSF_QTCB_CLOSE_LUN,
3387 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3388 erp_action->adapter->pool.fsf_req_erp,
3389 &lock_flags, &fsf_req);
3390 if (retval < 0) {
3391 ZFCP_LOG_INFO("error: Could not create close unit request for "
3392 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3393 erp_action->unit->fcp_lun,
3394 erp_action->port->wwpn,
3395 zfcp_get_busid_by_adapter(erp_action->adapter));
3396 goto out;
3397 }
3398
3399 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3400 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3401 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3402
3403 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3404 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3405 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3406 fsf_req->data = (unsigned long) erp_action->unit;
3407 fsf_req->erp_action = erp_action;
3408 erp_action->fsf_req = fsf_req;
3409
3410 zfcp_erp_start_timer(fsf_req);
3411 retval = zfcp_fsf_req_send(erp_action->fsf_req);
3412 if (retval) {
3413 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3414 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3415 erp_action->unit->fcp_lun,
3416 erp_action->port->wwpn,
3417 zfcp_get_busid_by_adapter(erp_action->adapter));
3418 zfcp_fsf_req_free(fsf_req);
3419 erp_action->fsf_req = NULL;
3420 goto out;
3421 }
3422
3423 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3424 "port 0x%016Lx, unit 0x%016Lx)\n",
3425 zfcp_get_busid_by_adapter(erp_action->adapter),
3426 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3427 out:
3428 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3429 lock_flags);
3430 return retval;
3431 }
3432
3433 /*
3434 * function: zfcp_fsf_close_unit_handler
3435 *
3436 * purpose: is called for finished Close LUN FSF command
3437 *
3438 * returns:
3439 */
3440 static int
3441 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3442 {
3443 int retval = -EINVAL;
3444 struct zfcp_unit *unit;
3445
3446 unit = (struct zfcp_unit *) fsf_req->data;
3447
3448 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3449 /* don't change unit status in our bookkeeping */
3450 goto skip_fsfstatus;
3451 }
3452
3453 /* evaluate FSF status in QTCB */
3454 switch (fsf_req->qtcb->header.fsf_status) {
3455
3456 case FSF_PORT_HANDLE_NOT_VALID:
3457 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3458 "0x%016Lx on adapter %s invalid. This may "
3459 "happen in rare circumstances\n",
3460 unit->port->handle,
3461 unit->port->wwpn,
3462 zfcp_get_busid_by_unit(unit));
3463 ZFCP_LOG_DEBUG("status qualifier:\n");
3464 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3465 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3466 sizeof (union fsf_status_qual));
3467 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3468 "fsf_s_phand_nv");
3469 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3471 break;
3472
3473 case FSF_LUN_HANDLE_NOT_VALID:
3474 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3475 "0x%016Lx on port 0x%016Lx on adapter %s is "
3476 "invalid. This may happen occasionally.\n",
3477 unit->handle,
3478 unit->fcp_lun,
3479 unit->port->wwpn,
3480 zfcp_get_busid_by_unit(unit));
3481 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3482 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3483 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3484 sizeof (union fsf_status_qual));
3485 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3486 "fsf_s_lhand_nv");
3487 zfcp_erp_port_reopen(unit->port, 0);
3488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3489 break;
3490
3491 case FSF_PORT_BOXED:
3492 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3493 "needs to be reopened\n",
3494 unit->port->wwpn,
3495 zfcp_get_busid_by_unit(unit));
3496 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3497 zfcp_erp_port_boxed(unit->port);
3498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3499 ZFCP_STATUS_FSFREQ_RETRY;
3500 break;
3501
3502 case FSF_ADAPTER_STATUS_AVAILABLE:
3503 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3504 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3505 /* re-establish link to port */
3506 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3507 "fsf_sq_ltest");
3508 zfcp_test_link(unit->port);
3509 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3510 break;
3511 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3512 /* ERP strategy will escalate */
3513 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3514 "fsf_sq_ulp");
3515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3516 break;
3517 default:
3518 ZFCP_LOG_NORMAL
3519 ("bug: Wrong status qualifier 0x%x arrived.\n",
3520 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3521 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3522 "fsf_sq_inval:");
3523 debug_exception(
3524 fsf_req->adapter->erp_dbf, 0,
3525 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3526 sizeof (u32));
3527 break;
3528 }
3529 break;
3530
3531 case FSF_GOOD:
3532 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3533 "closed, port handle 0x%x\n",
3534 unit->fcp_lun,
3535 unit->port->wwpn,
3536 zfcp_get_busid_by_unit(unit),
3537 unit->handle);
3538 /* mark unit as closed */
3539 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3540 retval = 0;
3541 break;
3542
3543 default:
3544 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3545 "(debug info 0x%x)\n",
3546 fsf_req->qtcb->header.fsf_status);
3547 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3548 debug_exception(fsf_req->adapter->erp_dbf, 0,
3549 &fsf_req->qtcb->header.fsf_status,
3550 sizeof (u32));
3551 break;
3552 }
3553
3554 skip_fsfstatus:
3555 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3556 return retval;
3557 }
3558
3559 /**
3560 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3561 * @adapter: adapter where scsi command is issued
3562 * @unit: unit where command is sent to
3563 * @scsi_cmnd: scsi command to be sent
3564 * @timer: timer to be started when request is initiated
3565 * @req_flags: flags for fsf_request
3566 */
3567 int
3568 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3569 struct zfcp_unit *unit,
3570 struct scsi_cmnd * scsi_cmnd,
3571 int use_timer, int req_flags)
3572 {
3573 struct zfcp_fsf_req *fsf_req = NULL;
3574 struct fcp_cmnd_iu *fcp_cmnd_iu;
3575 unsigned int sbtype;
3576 unsigned long lock_flags;
3577 int real_bytes = 0;
3578 int retval = 0;
3579 int mask;
3580
3581 /* setup new FSF request */
3582 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3583 adapter->pool.fsf_req_scsi,
3584 &lock_flags, &fsf_req);
3585 if (unlikely(retval < 0)) {
3586 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3587 "for unit 0x%016Lx on port 0x%016Lx on "
3588 "adapter %s\n",
3589 unit->fcp_lun,
3590 unit->port->wwpn,
3591 zfcp_get_busid_by_adapter(adapter));
3592 goto failed_req_create;
3593 }
3594
3595 zfcp_unit_get(unit);
3596 fsf_req->unit = unit;
3597
3598 /* associate FSF request with SCSI request (for look up on abort) */
3599 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
3600
3601 /* associate SCSI command with FSF request */
3602 fsf_req->data = (unsigned long) scsi_cmnd;
3603
3604 /* set handles of unit and its parent port in QTCB */
3605 fsf_req->qtcb->header.lun_handle = unit->handle;
3606 fsf_req->qtcb->header.port_handle = unit->port->handle;
3607
3608 /* FSF does not define the structure of the FCP_CMND IU */
3609 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3610 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3611
3612 /*
3613 * set depending on data direction:
3614 * data direction bits in SBALE (SB Type)
3615 * data direction bits in QTCB
3616 * data direction bits in FCP_CMND IU
3617 */
3618 switch (scsi_cmnd->sc_data_direction) {
3619 case DMA_NONE:
3620 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3621 /*
3622 * FIXME(qdio):
3623 * what is the correct type for commands
3624 * without 'real' data buffers?
3625 */
3626 sbtype = SBAL_FLAGS0_TYPE_READ;
3627 break;
3628 case DMA_FROM_DEVICE:
3629 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3630 sbtype = SBAL_FLAGS0_TYPE_READ;
3631 fcp_cmnd_iu->rddata = 1;
3632 break;
3633 case DMA_TO_DEVICE:
3634 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3635 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3636 fcp_cmnd_iu->wddata = 1;
3637 break;
3638 case DMA_BIDIRECTIONAL:
3639 default:
3640 /*
3641 * dummy, catch this condition earlier
3642 * in zfcp_scsi_queuecommand
3643 */
3644 goto failed_scsi_cmnd;
3645 }
3646
3647 /* set FC service class in QTCB (3 per default) */
3648 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
3649
3650 /* set FCP_LUN in FCP_CMND IU in QTCB */
3651 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3652
3653 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3654
3655 /* set task attributes in FCP_CMND IU in QTCB */
3656 if (likely((scsi_cmnd->device->simple_tags) ||
3657 (atomic_test_mask(mask, &unit->status))))
3658 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3659 else
3660 fcp_cmnd_iu->task_attribute = UNTAGGED;
3661
3662 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3663 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3664 fcp_cmnd_iu->add_fcp_cdb_length
3665 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3666 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3667 "additional FCP_CDB length is 0x%x "
3668 "(shifted right 2 bits)\n",
3669 scsi_cmnd->cmd_len,
3670 fcp_cmnd_iu->add_fcp_cdb_length);
3671 }
3672 /*
3673 * copy SCSI CDB (including additional length, if any) to
3674 * FCP_CDB in FCP_CMND IU in QTCB
3675 */
3676 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3677
3678 /* FCP CMND IU length in QTCB */
3679 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3680 sizeof (struct fcp_cmnd_iu) +
3681 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3682
3683 /* generate SBALEs from data buffer */
3684 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3685 if (unlikely(real_bytes < 0)) {
3686 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3687 ZFCP_LOG_DEBUG(
3688 "Data did not fit into available buffer(s), "
3689 "waiting for more...\n");
3690 retval = -EIO;
3691 } else {
3692 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3693 "required. Shutting down unit "
3694 "(adapter %s, port 0x%016Lx, "
3695 "unit 0x%016Lx)\n",
3696 zfcp_get_busid_by_unit(unit),
3697 unit->port->wwpn,
3698 unit->fcp_lun);
3699 zfcp_erp_unit_shutdown(unit, 0);
3700 retval = -EINVAL;
3701 }
3702 goto no_fit;
3703 }
3704
3705 /* set length of FCP data length in FCP_CMND IU in QTCB */
3706 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3707
3708 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3709 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3710 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3711
3712 if (use_timer)
3713 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3714
3715 retval = zfcp_fsf_req_send(fsf_req);
3716 if (unlikely(retval < 0)) {
3717 ZFCP_LOG_INFO("error: Could not send FCP command request "
3718 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3719 zfcp_get_busid_by_adapter(adapter),
3720 unit->port->wwpn,
3721 unit->fcp_lun);
3722 goto send_failed;
3723 }
3724
3725 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3726 "port 0x%016Lx, unit 0x%016Lx)\n",
3727 zfcp_get_busid_by_adapter(adapter),
3728 unit->port->wwpn,
3729 unit->fcp_lun);
3730 goto success;
3731
3732 send_failed:
3733 no_fit:
3734 failed_scsi_cmnd:
3735 zfcp_unit_put(unit);
3736 zfcp_fsf_req_free(fsf_req);
3737 fsf_req = NULL;
3738 scsi_cmnd->host_scribble = NULL;
3739 success:
3740 failed_req_create:
3741 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3742 return retval;
3743 }
3744
3745 struct zfcp_fsf_req *
3746 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3747 struct zfcp_unit *unit,
3748 u8 tm_flags, int req_flags)
3749 {
3750 struct zfcp_fsf_req *fsf_req = NULL;
3751 int retval = 0;
3752 struct fcp_cmnd_iu *fcp_cmnd_iu;
3753 unsigned long lock_flags;
3754 volatile struct qdio_buffer_element *sbale;
3755
3756 /* setup new FSF request */
3757 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3758 adapter->pool.fsf_req_scsi,
3759 &lock_flags, &fsf_req);
3760 if (retval < 0) {
3761 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3762 "management) request for adapter %s, port "
3763 " 0x%016Lx, unit 0x%016Lx.\n",
3764 zfcp_get_busid_by_adapter(adapter),
3765 unit->port->wwpn, unit->fcp_lun);
3766 goto out;
3767 }
3768
3769 /*
3770 * Used to decide on proper handler in the return path,
3771 * could be either zfcp_fsf_send_fcp_command_task_handler or
3772 * zfcp_fsf_send_fcp_command_task_management_handler */
3773
3774 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3775
3776 /*
3777 * hold a pointer to the unit being target of this
3778 * task management request
3779 */
3780 fsf_req->data = (unsigned long) unit;
3781
3782 /* set FSF related fields in QTCB */
3783 fsf_req->qtcb->header.lun_handle = unit->handle;
3784 fsf_req->qtcb->header.port_handle = unit->port->handle;
3785 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3786 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
3787 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3788 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3789
3790 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3791 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3792 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3793
3794 /* set FCP related fields in FCP_CMND IU in QTCB */
3795 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3796 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3797 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3798 fcp_cmnd_iu->task_management_flags = tm_flags;
3799
3800 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
3801 retval = zfcp_fsf_req_send(fsf_req);
3802 if (retval) {
3803 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3804 "management) on adapter %s, port 0x%016Lx for "
3805 "unit LUN 0x%016Lx\n",
3806 zfcp_get_busid_by_adapter(adapter),
3807 unit->port->wwpn,
3808 unit->fcp_lun);
3809 zfcp_fsf_req_free(fsf_req);
3810 fsf_req = NULL;
3811 goto out;
3812 }
3813
3814 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3815 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3816 "tm_flags=0x%x)\n",
3817 zfcp_get_busid_by_adapter(adapter),
3818 unit->port->wwpn,
3819 unit->fcp_lun,
3820 tm_flags);
3821 out:
3822 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3823 return fsf_req;
3824 }
3825
3826 /*
3827 * function: zfcp_fsf_send_fcp_command_handler
3828 *
3829 * purpose: is called for finished Send FCP Command
3830 *
3831 * returns:
3832 */
3833 static int
3834 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3835 {
3836 int retval = -EINVAL;
3837 struct zfcp_unit *unit;
3838 struct fsf_qtcb_header *header;
3839 u16 subtable, rule, counter;
3840
3841 header = &fsf_req->qtcb->header;
3842
3843 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3844 unit = (struct zfcp_unit *) fsf_req->data;
3845 else
3846 unit = fsf_req->unit;
3847
3848 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3849 /* go directly to calls of special handlers */
3850 goto skip_fsfstatus;
3851 }
3852
3853 /* evaluate FSF status in QTCB */
3854 switch (header->fsf_status) {
3855
3856 case FSF_PORT_HANDLE_NOT_VALID:
3857 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3858 "0x%016Lx on adapter %s invalid\n",
3859 unit->port->handle,
3860 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3861 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3862 (char *) &header->fsf_status_qual,
3863 sizeof (union fsf_status_qual));
3864 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3865 "fsf_s_phand_nv");
3866 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3867 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3868 break;
3869
3870 case FSF_LUN_HANDLE_NOT_VALID:
3871 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3872 "0x%016Lx on port 0x%016Lx on adapter %s is "
3873 "invalid. This may happen occasionally.\n",
3874 unit->handle,
3875 unit->fcp_lun,
3876 unit->port->wwpn,
3877 zfcp_get_busid_by_unit(unit));
3878 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3879 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3880 (char *) &header->fsf_status_qual,
3881 sizeof (union fsf_status_qual));
3882 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3883 "fsf_s_uhand_nv");
3884 zfcp_erp_port_reopen(unit->port, 0);
3885 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3886 break;
3887
3888 case FSF_HANDLE_MISMATCH:
3889 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3890 "unexpectedly. (adapter %s, port 0x%016Lx, "
3891 "unit 0x%016Lx)\n",
3892 unit->port->handle,
3893 zfcp_get_busid_by_unit(unit),
3894 unit->port->wwpn,
3895 unit->fcp_lun);
3896 ZFCP_LOG_NORMAL("status qualifier:\n");
3897 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3898 (char *) &header->fsf_status_qual,
3899 sizeof (union fsf_status_qual));
3900 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3901 "fsf_s_hand_mis");
3902 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3903 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3904 break;
3905
3906 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3907 ZFCP_LOG_INFO("error: adapter %s does not support fc "
3908 "class %d.\n",
3909 zfcp_get_busid_by_unit(unit),
3910 ZFCP_FC_SERVICE_CLASS_DEFAULT);
3911 /* stop operation for this adapter */
3912 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3913 "fsf_s_class_nsup");
3914 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3915 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3916 break;
3917
3918 case FSF_FCPLUN_NOT_VALID:
3919 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3920 "adapter %s does not have correct unit "
3921 "handle 0x%x\n",
3922 unit->fcp_lun,
3923 unit->port->wwpn,
3924 zfcp_get_busid_by_unit(unit),
3925 unit->handle);
3926 ZFCP_LOG_DEBUG("status qualifier:\n");
3927 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3928 (char *) &header->fsf_status_qual,
3929 sizeof (union fsf_status_qual));
3930 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3931 "fsf_s_fcp_lun_nv");
3932 zfcp_erp_port_reopen(unit->port, 0);
3933 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3934 break;
3935
3936 case FSF_ACCESS_DENIED:
3937 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3938 "unit 0x%016Lx on port 0x%016Lx on "
3939 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3940 zfcp_get_busid_by_unit(unit));
3941 for (counter = 0; counter < 2; counter++) {
3942 subtable = header->fsf_status_qual.halfword[counter * 2];
3943 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3944 switch (subtable) {
3945 case FSF_SQ_CFDC_SUBTABLE_OS:
3946 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3947 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3948 case FSF_SQ_CFDC_SUBTABLE_LUN:
3949 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3950 zfcp_act_subtable_type[subtable], rule);
3951 break;
3952 }
3953 }
3954 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3955 zfcp_erp_unit_access_denied(unit);
3956 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3957 break;
3958
3959 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3960 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3961 "0x%016Lx on port 0x%016Lx on adapter %s "
3962 "(debug info %d)\n",
3963 unit->fcp_lun,
3964 unit->port->wwpn,
3965 zfcp_get_busid_by_unit(unit),
3966 fsf_req->qtcb->bottom.io.data_direction);
3967 /* stop operation for this adapter */
3968 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3969 "fsf_s_dir_ind_nv");
3970 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3971 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3972 break;
3973
3974 case FSF_CMND_LENGTH_NOT_VALID:
3975 ZFCP_LOG_NORMAL
3976 ("bug: An invalid control-data-block length field "
3977 "was found in a command for unit 0x%016Lx on port "
3978 "0x%016Lx on adapter %s " "(debug info %d)\n",
3979 unit->fcp_lun, unit->port->wwpn,
3980 zfcp_get_busid_by_unit(unit),
3981 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3982 /* stop operation for this adapter */
3983 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3984 "fsf_s_cmd_len_nv");
3985 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3986 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3987 break;
3988
3989 case FSF_PORT_BOXED:
3990 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3991 "needs to be reopened\n",
3992 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3993 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3994 zfcp_erp_port_boxed(unit->port);
3995 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3996 ZFCP_STATUS_FSFREQ_RETRY;
3997 break;
3998
3999 case FSF_LUN_BOXED:
4000 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
4001 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
4002 zfcp_get_busid_by_unit(unit),
4003 unit->port->wwpn, unit->fcp_lun);
4004 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
4005 zfcp_erp_unit_boxed(unit);
4006 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
4007 | ZFCP_STATUS_FSFREQ_RETRY;
4008 break;
4009
4010 case FSF_ADAPTER_STATUS_AVAILABLE:
4011 switch (header->fsf_status_qual.word[0]) {
4012 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
4013 /* re-establish link to port */
4014 debug_text_event(fsf_req->adapter->erp_dbf, 1,
4015 "fsf_sq_ltest");
4016 zfcp_test_link(unit->port);
4017 break;
4018 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
4019 /* FIXME(hw) need proper specs for proper action */
4020 /* let scsi stack deal with retries and escalation */
4021 debug_text_event(fsf_req->adapter->erp_dbf, 1,
4022 "fsf_sq_ulp");
4023 break;
4024 default:
4025 ZFCP_LOG_NORMAL
4026 ("Unknown status qualifier 0x%x arrived.\n",
4027 header->fsf_status_qual.word[0]);
4028 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4029 "fsf_sq_inval:");
4030 debug_exception(fsf_req->adapter->erp_dbf, 0,
4031 &header->fsf_status_qual.word[0],
4032 sizeof(u32));
4033 break;
4034 }
4035 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4036 break;
4037
4038 case FSF_GOOD:
4039 break;
4040
4041 case FSF_FCP_RSP_AVAILABLE:
4042 break;
4043
4044 default:
4045 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
4046 debug_exception(fsf_req->adapter->erp_dbf, 0,
4047 &header->fsf_status, sizeof(u32));
4048 break;
4049 }
4050
4051 skip_fsfstatus:
4052 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
4053 retval =
4054 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
4055 } else {
4056 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
4057 fsf_req->unit = NULL;
4058 zfcp_unit_put(unit);
4059 }
4060 return retval;
4061 }
4062
4063 /*
4064 * function: zfcp_fsf_send_fcp_command_task_handler
4065 *
4066 * purpose: evaluates FCP_RSP IU
4067 *
4068 * returns:
4069 */
4070 static int
4071 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
4072 {
4073 int retval = 0;
4074 struct scsi_cmnd *scpnt;
4075 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4076 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4077 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
4078 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
4079 u32 sns_len;
4080 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4081 unsigned long flags;
4082 struct zfcp_unit *unit = fsf_req->unit;
4083
4084 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
4085 scpnt = (struct scsi_cmnd *) fsf_req->data;
4086 if (unlikely(!scpnt)) {
4087 ZFCP_LOG_DEBUG
4088 ("Command with fsf_req %p is not associated to "
4089 "a scsi command anymore. Aborted?\n", fsf_req);
4090 goto out;
4091 }
4092 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4093 /* FIXME: (design) mid-layer should handle DID_ABORT like
4094 * DID_SOFT_ERROR by retrying the request for devices
4095 * that allow retries.
4096 */
4097 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4098 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4099 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4100 goto skip_fsfstatus;
4101 }
4102
4103 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4104 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4105 set_host_byte(&scpnt->result, DID_ERROR);
4106 goto skip_fsfstatus;
4107 }
4108
4109 /* set message byte of result in SCSI command */
4110 scpnt->result |= COMMAND_COMPLETE << 8;
4111
4112 /*
4113 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4114 * of result in SCSI command
4115 */
4116 scpnt->result |= fcp_rsp_iu->scsi_status;
4117 if (unlikely(fcp_rsp_iu->scsi_status)) {
4118 /* DEBUG */
4119 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4120 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4121 scpnt->cmnd, scpnt->cmd_len);
4122 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4123 fcp_rsp_iu->scsi_status);
4124 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4125 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4126 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4127 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4128 fcp_rsp_iu->fcp_sns_len);
4129 }
4130
4131 /* check FCP_RSP_INFO */
4132 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4133 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4134 switch (fcp_rsp_info[3]) {
4135 case RSP_CODE_GOOD:
4136 /* ok, continue */
4137 ZFCP_LOG_TRACE("no failure or Task Management "
4138 "Function complete\n");
4139 set_host_byte(&scpnt->result, DID_OK);
4140 break;
4141 case RSP_CODE_LENGTH_MISMATCH:
4142 /* hardware bug */
4143 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4144 "that the fibrechannel protocol data "
4145 "length differs from the burst length. "
4146 "The problem occured on unit 0x%016Lx "
4147 "on port 0x%016Lx on adapter %s",
4148 unit->fcp_lun,
4149 unit->port->wwpn,
4150 zfcp_get_busid_by_unit(unit));
4151 /* dump SCSI CDB as prepared by zfcp */
4152 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4153 (char *) &fsf_req->qtcb->
4154 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4155 set_host_byte(&scpnt->result, DID_ERROR);
4156 goto skip_fsfstatus;
4157 case RSP_CODE_FIELD_INVALID:
4158 /* driver or hardware bug */
4159 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4160 "that the fibrechannel protocol data "
4161 "fields were incorrectly set up. "
4162 "The problem occured on the unit "
4163 "0x%016Lx on port 0x%016Lx on "
4164 "adapter %s",
4165 unit->fcp_lun,
4166 unit->port->wwpn,
4167 zfcp_get_busid_by_unit(unit));
4168 /* dump SCSI CDB as prepared by zfcp */
4169 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4170 (char *) &fsf_req->qtcb->
4171 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4172 set_host_byte(&scpnt->result, DID_ERROR);
4173 goto skip_fsfstatus;
4174 case RSP_CODE_RO_MISMATCH:
4175 /* hardware bug */
4176 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4177 "that conflicting values for the "
4178 "fibrechannel payload offset from the "
4179 "header were found. "
4180 "The problem occured on unit 0x%016Lx "
4181 "on port 0x%016Lx on adapter %s.\n",
4182 unit->fcp_lun,
4183 unit->port->wwpn,
4184 zfcp_get_busid_by_unit(unit));
4185 /* dump SCSI CDB as prepared by zfcp */
4186 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4187 (char *) &fsf_req->qtcb->
4188 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4189 set_host_byte(&scpnt->result, DID_ERROR);
4190 goto skip_fsfstatus;
4191 default:
4192 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4193 "code was detected for a command. "
4194 "The problem occured on the unit "
4195 "0x%016Lx on port 0x%016Lx on "
4196 "adapter %s (debug info 0x%x)\n",
4197 unit->fcp_lun,
4198 unit->port->wwpn,
4199 zfcp_get_busid_by_unit(unit),
4200 fcp_rsp_info[3]);
4201 /* dump SCSI CDB as prepared by zfcp */
4202 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4203 (char *) &fsf_req->qtcb->
4204 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4205 set_host_byte(&scpnt->result, DID_ERROR);
4206 goto skip_fsfstatus;
4207 }
4208 }
4209
4210 /* check for sense data */
4211 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4212 sns_len = FSF_FCP_RSP_SIZE -
4213 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4214 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4215 sns_len);
4216 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4217 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4218 SCSI_SENSE_BUFFERSIZE);
4219 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4220 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4221 scpnt->result);
4222 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4223 (void *) &scpnt->cmnd, scpnt->cmd_len);
4224
4225 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4226 fcp_rsp_iu->fcp_sns_len);
4227 memcpy(&scpnt->sense_buffer,
4228 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4229 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4230 (void *) &scpnt->sense_buffer, sns_len);
4231 }
4232
4233 /* check for overrun */
4234 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4235 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4236 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4237 "The response data length is "
4238 "%d, the original length was %d.\n",
4239 unit->fcp_lun,
4240 unit->port->wwpn,
4241 zfcp_get_busid_by_unit(unit),
4242 fcp_rsp_iu->fcp_resid,
4243 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4244 }
4245
4246 /* check for underrun */
4247 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4248 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4249 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4250 "The response data length is "
4251 "%d, the original length was %d.\n",
4252 unit->fcp_lun,
4253 unit->port->wwpn,
4254 zfcp_get_busid_by_unit(unit),
4255 fcp_rsp_iu->fcp_resid,
4256 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4257
4258 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
4259 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
4260 scpnt->underflow)
4261 set_host_byte(&scpnt->result, DID_ERROR);
4262 }
4263
4264 skip_fsfstatus:
4265 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4266
4267 if (scpnt->result != 0)
4268 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
4269 else if (scpnt->retries > 0)
4270 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
4271 else
4272 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
4273
4274 /* cleanup pointer (need this especially for abort) */
4275 scpnt->host_scribble = NULL;
4276
4277 /* always call back */
4278 (scpnt->scsi_done) (scpnt);
4279
4280 /*
4281 * We must hold this lock until scsi_done has been called.
4282 * Otherwise we may call scsi_done after abort regarding this
4283 * command has completed.
4284 * Note: scsi_done must not block!
4285 */
4286 out:
4287 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4288 return retval;
4289 }
4290
4291 /*
4292 * function: zfcp_fsf_send_fcp_command_task_management_handler
4293 *
4294 * purpose: evaluates FCP_RSP IU
4295 *
4296 * returns:
4297 */
4298 static int
4299 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4300 {
4301 int retval = 0;
4302 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4303 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4304 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4305 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
4306
4307 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4308 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4309 goto skip_fsfstatus;
4310 }
4311
4312 /* check FCP_RSP_INFO */
4313 switch (fcp_rsp_info[3]) {
4314 case RSP_CODE_GOOD:
4315 /* ok, continue */
4316 ZFCP_LOG_DEBUG("no failure or Task Management "
4317 "Function complete\n");
4318 break;
4319 case RSP_CODE_TASKMAN_UNSUPP:
4320 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4321 "is not supported on the target device "
4322 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4323 unit->fcp_lun,
4324 unit->port->wwpn,
4325 zfcp_get_busid_by_unit(unit));
4326 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4327 break;
4328 case RSP_CODE_TASKMAN_FAILED:
4329 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4330 "failed to complete successfully. "
4331 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4332 unit->fcp_lun,
4333 unit->port->wwpn,
4334 zfcp_get_busid_by_unit(unit));
4335 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4336 break;
4337 default:
4338 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4339 "code was detected for a command. "
4340 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4341 "(debug info 0x%x)\n",
4342 unit->fcp_lun,
4343 unit->port->wwpn,
4344 zfcp_get_busid_by_unit(unit),
4345 fcp_rsp_info[3]);
4346 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4347 }
4348
4349 skip_fsfstatus:
4350 return retval;
4351 }
4352
4353
4354 /*
4355 * function: zfcp_fsf_control_file
4356 *
4357 * purpose: Initiator of the control file upload/download FSF requests
4358 *
4359 * returns: 0 - FSF request is successfuly created and queued
4360 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4361 * -EINVAL - Invalid direction specified
4362 * -ENOMEM - Insufficient memory
4363 * -EPERM - Cannot create FSF request or place it in QDIO queue
4364 */
4365 int
4366 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4367 struct zfcp_fsf_req **fsf_req_ptr,
4368 u32 fsf_command,
4369 u32 option,
4370 struct zfcp_sg_list *sg_list)
4371 {
4372 struct zfcp_fsf_req *fsf_req;
4373 struct fsf_qtcb_bottom_support *bottom;
4374 volatile struct qdio_buffer_element *sbale;
4375 unsigned long lock_flags;
4376 int req_flags = 0;
4377 int direction;
4378 int retval = 0;
4379
4380 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
4381 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4382 zfcp_get_busid_by_adapter(adapter));
4383 retval = -EOPNOTSUPP;
4384 goto out;
4385 }
4386
4387 switch (fsf_command) {
4388
4389 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4390 direction = SBAL_FLAGS0_TYPE_WRITE;
4391 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4392 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4393 req_flags = ZFCP_WAIT_FOR_SBAL;
4394 break;
4395
4396 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4397 direction = SBAL_FLAGS0_TYPE_READ;
4398 break;
4399
4400 default:
4401 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4402 retval = -EINVAL;
4403 goto out;
4404 }
4405
4406 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4407 NULL, &lock_flags, &fsf_req);
4408 if (retval < 0) {
4409 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4410 "adapter %s\n",
4411 zfcp_get_busid_by_adapter(adapter));
4412 retval = -EPERM;
4413 goto unlock_queue_lock;
4414 }
4415
4416 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4417 sbale[0].flags |= direction;
4418
4419 bottom = &fsf_req->qtcb->bottom.support;
4420 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4421 bottom->option = option;
4422
4423 if (sg_list->count > 0) {
4424 int bytes;
4425
4426 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4427 sg_list->sg, sg_list->count,
4428 ZFCP_MAX_SBALS_PER_REQ);
4429 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4430 ZFCP_LOG_INFO(
4431 "error: Could not create sufficient number of "
4432 "SBALS for an FSF request to the adapter %s\n",
4433 zfcp_get_busid_by_adapter(adapter));
4434 retval = -ENOMEM;
4435 goto free_fsf_req;
4436 }
4437 } else
4438 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4439
4440 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
4441 retval = zfcp_fsf_req_send(fsf_req);
4442 if (retval < 0) {
4443 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4444 "(adapter %s)\n",
4445 zfcp_get_busid_by_adapter(adapter));
4446 retval = -EPERM;
4447 goto free_fsf_req;
4448 }
4449 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4450
4451 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4452 "adapter %s\n",
4453 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4454 "download" : "upload",
4455 zfcp_get_busid_by_adapter(adapter));
4456
4457 wait_event(fsf_req->completion_wq,
4458 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4459
4460 *fsf_req_ptr = fsf_req;
4461 goto out;
4462
4463 free_fsf_req:
4464 zfcp_fsf_req_free(fsf_req);
4465 unlock_queue_lock:
4466 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4467 out:
4468 return retval;
4469 }
4470
4471
4472 /*
4473 * function: zfcp_fsf_control_file_handler
4474 *
4475 * purpose: Handler of the control file upload/download FSF requests
4476 *
4477 * returns: 0 - FSF request successfuly processed
4478 * -EAGAIN - Operation has to be repeated because of a temporary problem
4479 * -EACCES - There is no permission to execute an operation
4480 * -EPERM - The control file is not in a right format
4481 * -EIO - There is a problem with the FCP adapter
4482 * -EINVAL - Invalid operation
4483 * -EFAULT - User space memory I/O operation fault
4484 */
4485 static int
4486 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4487 {
4488 struct zfcp_adapter *adapter = fsf_req->adapter;
4489 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4490 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4491 int retval = 0;
4492
4493 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4494 retval = -EINVAL;
4495 goto skip_fsfstatus;
4496 }
4497
4498 switch (header->fsf_status) {
4499
4500 case FSF_GOOD:
4501 ZFCP_LOG_NORMAL(
4502 "The FSF request has been successfully completed "
4503 "on the adapter %s\n",
4504 zfcp_get_busid_by_adapter(adapter));
4505 break;
4506
4507 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4508 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4509 switch (header->fsf_status_qual.word[0]) {
4510
4511 case FSF_SQ_CFDC_HARDENED_ON_SE:
4512 ZFCP_LOG_NORMAL(
4513 "CFDC on the adapter %s has being "
4514 "hardened on primary and secondary SE\n",
4515 zfcp_get_busid_by_adapter(adapter));
4516 break;
4517
4518 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4519 ZFCP_LOG_NORMAL(
4520 "CFDC of the adapter %s could not "
4521 "be saved on the SE\n",
4522 zfcp_get_busid_by_adapter(adapter));
4523 break;
4524
4525 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4526 ZFCP_LOG_NORMAL(
4527 "CFDC of the adapter %s could not "
4528 "be copied to the secondary SE\n",
4529 zfcp_get_busid_by_adapter(adapter));
4530 break;
4531
4532 default:
4533 ZFCP_LOG_NORMAL(
4534 "CFDC could not be hardened "
4535 "on the adapter %s\n",
4536 zfcp_get_busid_by_adapter(adapter));
4537 }
4538 }
4539 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4540 retval = -EAGAIN;
4541 break;
4542
4543 case FSF_AUTHORIZATION_FAILURE:
4544 ZFCP_LOG_NORMAL(
4545 "Adapter %s does not accept privileged commands\n",
4546 zfcp_get_busid_by_adapter(adapter));
4547 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4548 retval = -EACCES;
4549 break;
4550
4551 case FSF_CFDC_ERROR_DETECTED:
4552 ZFCP_LOG_NORMAL(
4553 "Error at position %d in the CFDC, "
4554 "CFDC is discarded by the adapter %s\n",
4555 header->fsf_status_qual.word[0],
4556 zfcp_get_busid_by_adapter(adapter));
4557 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4558 retval = -EPERM;
4559 break;
4560
4561 case FSF_CONTROL_FILE_UPDATE_ERROR:
4562 ZFCP_LOG_NORMAL(
4563 "Adapter %s cannot harden the control file, "
4564 "file is discarded\n",
4565 zfcp_get_busid_by_adapter(adapter));
4566 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4567 retval = -EIO;
4568 break;
4569
4570 case FSF_CONTROL_FILE_TOO_LARGE:
4571 ZFCP_LOG_NORMAL(
4572 "Control file is too large, file is discarded "
4573 "by the adapter %s\n",
4574 zfcp_get_busid_by_adapter(adapter));
4575 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4576 retval = -EIO;
4577 break;
4578
4579 case FSF_ACCESS_CONFLICT_DETECTED:
4580 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4581 ZFCP_LOG_NORMAL(
4582 "CFDC has been discarded by the adapter %s, "
4583 "because activation would impact "
4584 "%d active connection(s)\n",
4585 zfcp_get_busid_by_adapter(adapter),
4586 header->fsf_status_qual.word[0]);
4587 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4588 retval = -EIO;
4589 break;
4590
4591 case FSF_CONFLICTS_OVERRULED:
4592 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4593 ZFCP_LOG_NORMAL(
4594 "CFDC has been activated on the adapter %s, "
4595 "but activation has impacted "
4596 "%d active connection(s)\n",
4597 zfcp_get_busid_by_adapter(adapter),
4598 header->fsf_status_qual.word[0]);
4599 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4600 retval = -EIO;
4601 break;
4602
4603 case FSF_UNKNOWN_OP_SUBTYPE:
4604 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4605 "op_subtype=0x%x)\n",
4606 zfcp_get_busid_by_adapter(adapter),
4607 bottom->operation_subtype);
4608 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4609 retval = -EINVAL;
4610 break;
4611
4612 case FSF_INVALID_COMMAND_OPTION:
4613 ZFCP_LOG_NORMAL(
4614 "Invalid option 0x%x has been specified "
4615 "in QTCB bottom sent to the adapter %s\n",
4616 bottom->option,
4617 zfcp_get_busid_by_adapter(adapter));
4618 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4619 retval = -EINVAL;
4620 break;
4621
4622 default:
4623 ZFCP_LOG_NORMAL(
4624 "bug: An unknown/unexpected FSF status 0x%08x "
4625 "was presented on the adapter %s\n",
4626 header->fsf_status,
4627 zfcp_get_busid_by_adapter(adapter));
4628 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4629 debug_exception(fsf_req->adapter->erp_dbf, 0,
4630 &header->fsf_status_qual.word[0], sizeof(u32));
4631 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4632 retval = -EINVAL;
4633 break;
4634 }
4635
4636 skip_fsfstatus:
4637 return retval;
4638 }
4639
4640 static inline int
4641 zfcp_fsf_req_sbal_check(unsigned long *flags,
4642 struct zfcp_qdio_queue *queue, int needed)
4643 {
4644 write_lock_irqsave(&queue->queue_lock, *flags);
4645 if (likely(atomic_read(&queue->free_count) >= needed))
4646 return 1;
4647 write_unlock_irqrestore(&queue->queue_lock, *flags);
4648 return 0;
4649 }
4650
4651 /*
4652 * set qtcb pointer in fsf_req and initialize QTCB
4653 */
4654 static void
4655 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
4656 {
4657 if (likely(fsf_req->qtcb != NULL)) {
4658 fsf_req->qtcb->prefix.req_seq_no =
4659 fsf_req->adapter->fsf_req_seq_no;
4660 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
4661 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4662 fsf_req->qtcb->prefix.qtcb_type =
4663 fsf_qtcb_type[fsf_req->fsf_command];
4664 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4665 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
4666 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
4667 }
4668 }
4669
4670 /**
4671 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4672 * @adapter: adapter for which request queue is examined
4673 * @req_flags: flags indicating whether to wait for needed SBAL or not
4674 * @lock_flags: lock_flags if queue_lock is taken
4675 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4676 * Locks: lock adapter->request_queue->queue_lock on success
4677 */
4678 static int
4679 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4680 unsigned long *lock_flags)
4681 {
4682 long ret;
4683 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4684
4685 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4686 ret = wait_event_interruptible_timeout(adapter->request_wq,
4687 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4688 ZFCP_SBAL_TIMEOUT);
4689 if (ret < 0)
4690 return ret;
4691 if (!ret)
4692 return -EIO;
4693 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4694 return -EIO;
4695
4696 return 0;
4697 }
4698
4699 /*
4700 * function: zfcp_fsf_req_create
4701 *
4702 * purpose: create an FSF request at the specified adapter and
4703 * setup common fields
4704 *
4705 * returns: -ENOMEM if there was insufficient memory for a request
4706 * -EIO if no qdio buffers could be allocate to the request
4707 * -EINVAL/-EPERM on bug conditions in req_dequeue
4708 * 0 in success
4709 *
4710 * note: The created request is returned by reference.
4711 *
4712 * locks: lock of concerned request queue must not be held,
4713 * but is held on completion (write, irqsave)
4714 */
4715 int
4716 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4717 mempool_t *pool, unsigned long *lock_flags,
4718 struct zfcp_fsf_req **fsf_req_p)
4719 {
4720 volatile struct qdio_buffer_element *sbale;
4721 struct zfcp_fsf_req *fsf_req = NULL;
4722 int ret = 0;
4723 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4724
4725 /* allocate new FSF request */
4726 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4727 if (unlikely(NULL == fsf_req)) {
4728 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4729 "the outbound (send) queue.\n");
4730 ret = -ENOMEM;
4731 goto failed_fsf_req;
4732 }
4733
4734 fsf_req->adapter = adapter;
4735 fsf_req->fsf_command = fsf_cmd;
4736 INIT_LIST_HEAD(&fsf_req->list);
4737 init_timer(&fsf_req->timer);
4738
4739 /* initialize waitqueue which may be used to wait on
4740 this request completion */
4741 init_waitqueue_head(&fsf_req->completion_wq);
4742
4743 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4744 if (ret < 0)
4745 goto failed_sbals;
4746
4747 /* this is serialized (we are holding req_queue-lock of adapter) */
4748 if (adapter->req_no == 0)
4749 adapter->req_no++;
4750 fsf_req->req_id = adapter->req_no++;
4751
4752 zfcp_fsf_req_qtcb_init(fsf_req);
4753
4754 /*
4755 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4756 * if it is not set (see also *_open_qdio and *_close_qdio).
4757 */
4758
4759 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4760 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4761 ret = -EIO;
4762 goto failed_sbals;
4763 }
4764
4765 if (fsf_req->qtcb) {
4766 fsf_req->seq_no = adapter->fsf_req_seq_no;
4767 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4768 }
4769 fsf_req->sbal_number = 1;
4770 fsf_req->sbal_first = req_queue->free_index;
4771 fsf_req->sbal_curr = req_queue->free_index;
4772 fsf_req->sbale_curr = 1;
4773
4774 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4775 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4776 }
4777
4778 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4779
4780 /* setup common SBALE fields */
4781 sbale[0].addr = (void *) fsf_req->req_id;
4782 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4783 if (likely(fsf_req->qtcb != NULL)) {
4784 sbale[1].addr = (void *) fsf_req->qtcb;
4785 sbale[1].length = sizeof(struct fsf_qtcb);
4786 }
4787
4788 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4789 fsf_req->sbal_number, fsf_req->sbal_first);
4790
4791 goto success;
4792
4793 failed_sbals:
4794 /* dequeue new FSF request previously enqueued */
4795 zfcp_fsf_req_free(fsf_req);
4796 fsf_req = NULL;
4797
4798 failed_fsf_req:
4799 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4800 success:
4801 *fsf_req_p = fsf_req;
4802 return ret;
4803 }
4804
4805 /*
4806 * function: zfcp_fsf_req_send
4807 *
4808 * purpose: start transfer of FSF request via QDIO
4809 *
4810 * returns: 0 - request transfer succesfully started
4811 * !0 - start of request transfer failed
4812 */
4813 static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
4814 {
4815 struct zfcp_adapter *adapter;
4816 struct zfcp_qdio_queue *req_queue;
4817 volatile struct qdio_buffer_element *sbale;
4818 int inc_seq_no;
4819 int new_distance_from_int;
4820 u64 dbg_tmp[2];
4821 int retval = 0;
4822
4823 adapter = fsf_req->adapter;
4824 req_queue = &adapter->request_queue,
4825
4826
4827 /* FIXME(debug): remove it later */
4828 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4829 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4830 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4831 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4832 sbale[1].length);
4833
4834 /* put allocated FSF request into hash table */
4835 spin_lock(&adapter->req_list_lock);
4836 zfcp_reqlist_add(adapter, fsf_req);
4837 spin_unlock(&adapter->req_list_lock);
4838
4839 inc_seq_no = (fsf_req->qtcb != NULL);
4840
4841 ZFCP_LOG_TRACE("request queue of adapter %s: "
4842 "next free SBAL is %i, %i free SBALs\n",
4843 zfcp_get_busid_by_adapter(adapter),
4844 req_queue->free_index,
4845 atomic_read(&req_queue->free_count));
4846
4847 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4848 "index_in_queue=%i, count=%i, buffers=%p\n",
4849 zfcp_get_busid_by_adapter(adapter),
4850 QDIO_FLAG_SYNC_OUTPUT,
4851 0, fsf_req->sbal_first, fsf_req->sbal_number,
4852 &req_queue->buffer[fsf_req->sbal_first]);
4853
4854 /*
4855 * adjust the number of free SBALs in request queue as well as
4856 * position of first one
4857 */
4858 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4859 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4860 req_queue->free_index += fsf_req->sbal_number; /* increase */
4861 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4862 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4863
4864 fsf_req->issued = get_clock();
4865
4866 retval = do_QDIO(adapter->ccw_device,
4867 QDIO_FLAG_SYNC_OUTPUT,
4868 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4869
4870 dbg_tmp[0] = (unsigned long) sbale[0].addr;
4871 dbg_tmp[1] = (u64) retval;
4872 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
4873
4874 if (unlikely(retval)) {
4875 /* Queues are down..... */
4876 retval = -EIO;
4877 del_timer(&fsf_req->timer);
4878 spin_lock(&adapter->req_list_lock);
4879 zfcp_reqlist_remove(adapter, fsf_req);
4880 spin_unlock(&adapter->req_list_lock);
4881 /* undo changes in request queue made for this request */
4882 zfcp_qdio_zero_sbals(req_queue->buffer,
4883 fsf_req->sbal_first, fsf_req->sbal_number);
4884 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4885 req_queue->free_index -= fsf_req->sbal_number;
4886 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4887 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4888 zfcp_erp_adapter_reopen(adapter, 0);
4889 } else {
4890 req_queue->distance_from_int = new_distance_from_int;
4891 /*
4892 * increase FSF sequence counter -
4893 * this must only be done for request successfully enqueued to
4894 * QDIO this rejected requests may be cleaned up by calling
4895 * routines resulting in missing sequence counter values
4896 * otherwise,
4897 */
4898
4899 /* Don't increase for unsolicited status */
4900 if (inc_seq_no)
4901 adapter->fsf_req_seq_no++;
4902
4903 /* count FSF requests pending */
4904 atomic_inc(&adapter->reqs_active);
4905 }
4906 return retval;
4907 }
4908
4909 #undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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