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[SCSI] zfcp: fix link down handling during firmware update
[linux-2.6/linux-loongson.git] / drivers / s390 / scsi / zfcp_fsf.c
blob59587951c847cae2a6eb48baadaa3d64ba0136b4
1 /*
2 *
3 * linux/drivers/s390/scsi/zfcp_fsf.c
4 *
5 * FCP adapter driver for IBM eServer zSeries
6 *
7 * (C) Copyright IBM Corp. 2002, 2004
8 *
9 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
10 * Raimund Schroeder <raimund.schroeder@de.ibm.com>
11 * Aron Zeh
12 * Wolfgang Taphorn
13 * Stefan Bader <stefan.bader@de.ibm.com>
14 * Heiko Carstens <heiko.carstens@de.ibm.com>
15 * Andreas Herrmann <aherrman@de.ibm.com>
16 * Volker Sameske <sameske@de.ibm.com>
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2, or (at your option)
21 * any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33 #define ZFCP_FSF_C_REVISION "$Revision: 1.92 $"
34
35 #include "zfcp_ext.h"
36
37 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
38 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
39 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
40 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
41 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
42 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
43 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
44 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
45 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
46 static int zfcp_fsf_send_fcp_command_task_management_handler(
47 struct zfcp_fsf_req *);
48 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
49 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
50 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
51 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
52 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
53 static inline int zfcp_fsf_req_sbal_check(
54 unsigned long *, struct zfcp_qdio_queue *, int);
55 static inline int zfcp_use_one_sbal(
56 struct scatterlist *, int, struct scatterlist *, int);
57 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
58 static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *);
59 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
60 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
61 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
62 static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *,
63 struct fsf_link_down_info *);
64 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
65 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
66
67 /* association between FSF command and FSF QTCB type */
68 static u32 fsf_qtcb_type[] = {
69 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
70 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
75 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
76 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
77 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
78 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
79 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
80 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
81 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
82 };
83
84 static const char zfcp_act_subtable_type[5][8] = {
85 "unknown", "OS", "WWPN", "DID", "LUN"
86 };
87
88 /****************************************************************/
89 /*************** FSF related Functions *************************/
90 /****************************************************************/
91
92 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
93
94 /*
95 * function: zfcp_fsf_req_alloc
96 *
97 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
98 * unsolicited requests) via helper functions
99 * Does some initial fsf request set-up.
100 *
101 * returns: pointer to allocated fsf_req if successfull
102 * NULL otherwise
103 *
104 * locks: none
105 *
106 */
107 static struct zfcp_fsf_req *
108 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
109 {
110 size_t size;
111 void *ptr;
112 struct zfcp_fsf_req *fsf_req = NULL;
113
114 if (req_flags & ZFCP_REQ_NO_QTCB)
115 size = sizeof(struct zfcp_fsf_req);
116 else
117 size = sizeof(struct zfcp_fsf_req_pool_element);
118
119 if (likely(pool != NULL))
120 ptr = mempool_alloc(pool, GFP_ATOMIC);
121 else
122 ptr = kmalloc(size, GFP_ATOMIC);
123
124 if (unlikely(NULL == ptr))
125 goto out;
126
127 memset(ptr, 0, size);
128
129 if (req_flags & ZFCP_REQ_NO_QTCB) {
130 fsf_req = (struct zfcp_fsf_req *) ptr;
131 } else {
132 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
133 fsf_req->qtcb =
134 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
135 }
136
137 fsf_req->pool = pool;
138
139 out:
140 return fsf_req;
141 }
142
143 /*
144 * function: zfcp_fsf_req_free
145 *
146 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
147 * returns it into the pool via helper functions.
148 *
149 * returns: sod all
150 *
151 * locks: none
152 */
153 void
154 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
155 {
156 if (likely(fsf_req->pool != NULL))
157 mempool_free(fsf_req, fsf_req->pool);
158 else
159 kfree(fsf_req);
160 }
161
162 /*
163 * function:
164 *
165 * purpose:
166 *
167 * returns:
168 *
169 * note: qdio queues shall be down (no ongoing inbound processing)
170 */
171 int
172 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
173 {
174 struct zfcp_fsf_req *fsf_req, *tmp;
175 unsigned long flags;
176 LIST_HEAD(remove_queue);
177
178 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
179 list_splice_init(&adapter->fsf_req_list_head, &remove_queue);
180 atomic_set(&adapter->fsf_reqs_active, 0);
181 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
182
183 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
184 list_del(&fsf_req->list);
185 zfcp_fsf_req_dismiss(fsf_req);
186 }
187
188 return 0;
189 }
190
191 /*
192 * function:
193 *
194 * purpose:
195 *
196 * returns:
197 */
198 static void
199 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
200 {
201 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
202 zfcp_fsf_req_complete(fsf_req);
203 }
204
205 /*
206 * function: zfcp_fsf_req_complete
207 *
208 * purpose: Updates active counts and timers for openfcp-reqs
209 * May cleanup request after req_eval returns
210 *
211 * returns: 0 - success
212 * !0 - failure
213 *
214 * context:
215 */
216 int
217 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
218 {
219 int retval = 0;
220 int cleanup;
221
222 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
223 ZFCP_LOG_DEBUG("Status read response received\n");
224 /*
225 * Note: all cleanup handling is done in the callchain of
226 * the function call-chain below.
227 */
228 zfcp_fsf_status_read_handler(fsf_req);
229 goto out;
230 } else
231 zfcp_fsf_protstatus_eval(fsf_req);
232
233 /*
234 * fsf_req may be deleted due to waking up functions, so
235 * cleanup is saved here and used later
236 */
237 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
238 cleanup = 1;
239 else
240 cleanup = 0;
241
242 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
243
244 /* cleanup request if requested by initiator */
245 if (likely(cleanup)) {
246 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
247 /*
248 * lock must not be held here since it will be
249 * grabed by the called routine, too
250 */
251 zfcp_fsf_req_free(fsf_req);
252 } else {
253 /* notify initiator waiting for the requests completion */
254 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
255 /*
256 * FIXME: Race! We must not access fsf_req here as it might have been
257 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
258 * flag. It's an improbable case. But, we have the same paranoia for
259 * the cleanup flag already.
260 * Might better be handled using complete()?
261 * (setting the flag and doing wakeup ought to be atomic
262 * with regard to checking the flag as long as waitqueue is
263 * part of the to be released structure)
264 */
265 wake_up(&fsf_req->completion_wq);
266 }
267
268 out:
269 return retval;
270 }
271
272 /*
273 * function: zfcp_fsf_protstatus_eval
274 *
275 * purpose: evaluates the QTCB of the finished FSF request
276 * and initiates appropriate actions
277 * (usually calling FSF command specific handlers)
278 *
279 * returns:
280 *
281 * context:
282 *
283 * locks:
284 */
285 static int
286 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
287 {
288 int retval = 0;
289 struct zfcp_adapter *adapter = fsf_req->adapter;
290 struct fsf_qtcb *qtcb = fsf_req->qtcb;
291 union fsf_prot_status_qual *prot_status_qual =
292 &qtcb->prefix.prot_status_qual;
293
294 zfcp_hba_dbf_event_fsf_response(fsf_req);
295
296 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
297 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
298 (unsigned long) fsf_req);
299 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
300 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
301 goto skip_protstatus;
302 }
303
304 /* log additional information provided by FSF (if any) */
305 if (unlikely(qtcb->header.log_length)) {
306 /* do not trust them ;-) */
307 if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
308 ZFCP_LOG_NORMAL
309 ("bug: ULP (FSF logging) log data starts "
310 "beyond end of packet header. Ignored. "
311 "(start=%i, size=%li)\n",
312 qtcb->header.log_start,
313 sizeof(struct fsf_qtcb));
314 goto forget_log;
315 }
316 if ((size_t) (qtcb->header.log_start + qtcb->header.log_length)
317 > sizeof(struct fsf_qtcb)) {
318 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
319 "beyond end of packet header. Ignored. "
320 "(start=%i, length=%i, size=%li)\n",
321 qtcb->header.log_start,
322 qtcb->header.log_length,
323 sizeof(struct fsf_qtcb));
324 goto forget_log;
325 }
326 ZFCP_LOG_TRACE("ULP log data: \n");
327 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
328 (char *) qtcb + qtcb->header.log_start,
329 qtcb->header.log_length);
330 }
331 forget_log:
332
333 /* evaluate FSF Protocol Status */
334 switch (qtcb->prefix.prot_status) {
335
336 case FSF_PROT_GOOD:
337 case FSF_PROT_FSF_STATUS_PRESENTED:
338 break;
339
340 case FSF_PROT_QTCB_VERSION_ERROR:
341 ZFCP_LOG_NORMAL("error: The adapter %s contains "
342 "microcode of version 0x%x, the device driver "
343 "only supports 0x%x. Aborting.\n",
344 zfcp_get_busid_by_adapter(adapter),
345 prot_status_qual->version_error.fsf_version,
346 ZFCP_QTCB_VERSION);
347 zfcp_erp_adapter_shutdown(adapter, 0);
348 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
349 break;
350
351 case FSF_PROT_SEQ_NUMB_ERROR:
352 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
353 "driver (0x%x) and adapter %s (0x%x). "
354 "Restarting all operations on this adapter.\n",
355 qtcb->prefix.req_seq_no,
356 zfcp_get_busid_by_adapter(adapter),
357 prot_status_qual->sequence_error.exp_req_seq_no);
358 zfcp_erp_adapter_reopen(adapter, 0);
359 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
360 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
361 break;
362
363 case FSF_PROT_UNSUPP_QTCB_TYPE:
364 ZFCP_LOG_NORMAL("error: Packet header type used by the "
365 "device driver is incompatible with "
366 "that used on adapter %s. "
367 "Stopping all operations on this adapter.\n",
368 zfcp_get_busid_by_adapter(adapter));
369 zfcp_erp_adapter_shutdown(adapter, 0);
370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372
373 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
374 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
376 &(adapter->status));
377 break;
378
379 case FSF_PROT_DUPLICATE_REQUEST_ID:
380 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
381 "to the adapter %s is ambiguous. "
382 "Stopping all operations on this adapter.\n",
383 *(unsigned long long*)
384 (&qtcb->bottom.support.req_handle),
385 zfcp_get_busid_by_adapter(adapter));
386 zfcp_erp_adapter_shutdown(adapter, 0);
387 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
388 break;
389
390 case FSF_PROT_LINK_DOWN:
391 zfcp_fsf_link_down_info_eval(adapter,
392 &prot_status_qual->link_down_info);
393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
394 break;
395
396 case FSF_PROT_REEST_QUEUE:
397 ZFCP_LOG_NORMAL("The local link to adapter with "
398 "%s was re-plugged. "
399 "Re-starting operations on this adapter.\n",
400 zfcp_get_busid_by_adapter(adapter));
401 /* All ports should be marked as ready to run again */
402 zfcp_erp_modify_adapter_status(adapter,
403 ZFCP_STATUS_COMMON_RUNNING,
404 ZFCP_SET);
405 zfcp_erp_adapter_reopen(adapter,
406 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
407 | ZFCP_STATUS_COMMON_ERP_FAILED);
408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
409 break;
410
411 case FSF_PROT_ERROR_STATE:
412 ZFCP_LOG_NORMAL("error: The adapter %s "
413 "has entered the error state. "
414 "Restarting all operations on this "
415 "adapter.\n",
416 zfcp_get_busid_by_adapter(adapter));
417 zfcp_erp_adapter_reopen(adapter, 0);
418 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
419 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
420 break;
421
422 default:
423 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
424 "provided by the adapter %s "
425 "is not compatible with the device driver. "
426 "Stopping all operations on this adapter. "
427 "(debug info 0x%x).\n",
428 zfcp_get_busid_by_adapter(adapter),
429 qtcb->prefix.prot_status);
430 zfcp_erp_adapter_shutdown(adapter, 0);
431 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
432 }
433
434 skip_protstatus:
435 /*
436 * always call specific handlers to give them a chance to do
437 * something meaningful even in error cases
438 */
439 zfcp_fsf_fsfstatus_eval(fsf_req);
440 return retval;
441 }
442
443 /*
444 * function: zfcp_fsf_fsfstatus_eval
445 *
446 * purpose: evaluates FSF status of completed FSF request
447 * and acts accordingly
448 *
449 * returns:
450 */
451 static int
452 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
453 {
454 int retval = 0;
455
456 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
457 goto skip_fsfstatus;
458 }
459
460 /* evaluate FSF Status */
461 switch (fsf_req->qtcb->header.fsf_status) {
462 case FSF_UNKNOWN_COMMAND:
463 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
464 "not known by the adapter %s "
465 "Stopping all operations on this adapter. "
466 "(debug info 0x%x).\n",
467 zfcp_get_busid_by_adapter(fsf_req->adapter),
468 fsf_req->qtcb->header.fsf_command);
469 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
471 break;
472
473 case FSF_FCP_RSP_AVAILABLE:
474 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
475 "SCSI stack.\n");
476 break;
477
478 case FSF_ADAPTER_STATUS_AVAILABLE:
479 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
480 break;
481 }
482
483 skip_fsfstatus:
484 /*
485 * always call specific handlers to give them a chance to do
486 * something meaningful even in error cases
487 */
488 zfcp_fsf_req_dispatch(fsf_req);
489
490 return retval;
491 }
492
493 /*
494 * function: zfcp_fsf_fsfstatus_qual_eval
495 *
496 * purpose: evaluates FSF status-qualifier of completed FSF request
497 * and acts accordingly
498 *
499 * returns:
500 */
501 static int
502 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
503 {
504 int retval = 0;
505
506 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
507 case FSF_SQ_FCP_RSP_AVAILABLE:
508 break;
509 case FSF_SQ_RETRY_IF_POSSIBLE:
510 /* The SCSI-stack may now issue retries or escalate */
511 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
512 break;
513 case FSF_SQ_COMMAND_ABORTED:
514 /* Carry the aborted state on to upper layer */
515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
517 break;
518 case FSF_SQ_NO_RECOM:
519 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
520 "problem on the adapter %s "
521 "Stopping all operations on this adapter. ",
522 zfcp_get_busid_by_adapter(fsf_req->adapter));
523 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
524 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
525 break;
526 case FSF_SQ_ULP_PROGRAMMING_ERROR:
527 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
528 "(adapter %s)\n",
529 zfcp_get_busid_by_adapter(fsf_req->adapter));
530 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
531 break;
532 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
533 case FSF_SQ_NO_RETRY_POSSIBLE:
534 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
535 /* dealt with in the respective functions */
536 break;
537 default:
538 ZFCP_LOG_NORMAL("bug: Additional status info could "
539 "not be interpreted properly.\n");
540 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
541 (char *) &fsf_req->qtcb->header.fsf_status_qual,
542 sizeof (union fsf_status_qual));
543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
544 break;
545 }
546
547 return retval;
548 }
549
550 /**
551 * zfcp_fsf_link_down_info_eval - evaluate link down information block
552 */
553 static void
554 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter,
555 struct fsf_link_down_info *link_down)
556 {
557 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
558 &adapter->status))
559 return;
560
561 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
562
563 if (link_down == NULL) {
564 zfcp_erp_adapter_reopen(adapter, 0);
565 return;
566 }
567
568 switch (link_down->error_code) {
569 case FSF_PSQ_LINK_NO_LIGHT:
570 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
571 "(no light detected)\n",
572 zfcp_get_busid_by_adapter(adapter));
573 break;
574 case FSF_PSQ_LINK_WRAP_PLUG:
575 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
576 "(wrap plug detected)\n",
577 zfcp_get_busid_by_adapter(adapter));
578 break;
579 case FSF_PSQ_LINK_NO_FCP:
580 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
581 "(adjacent node on link does not support FCP)\n",
582 zfcp_get_busid_by_adapter(adapter));
583 break;
584 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
585 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
586 "(firmware update in progress)\n",
587 zfcp_get_busid_by_adapter(adapter));
588 break;
589 case FSF_PSQ_LINK_INVALID_WWPN:
590 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
591 "(duplicate or invalid WWPN detected)\n",
592 zfcp_get_busid_by_adapter(adapter));
593 break;
594 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
595 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
596 "(no support for NPIV by Fabric)\n",
597 zfcp_get_busid_by_adapter(adapter));
598 break;
599 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
600 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
601 "(out of resource in FCP daughtercard)\n",
602 zfcp_get_busid_by_adapter(adapter));
603 break;
604 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
605 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
606 "(out of resource in Fabric)\n",
607 zfcp_get_busid_by_adapter(adapter));
608 break;
609 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
610 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
611 "(unable to Fabric login)\n",
612 zfcp_get_busid_by_adapter(adapter));
613 break;
614 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
615 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
616 zfcp_get_busid_by_adapter(adapter));
617 break;
618 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
619 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
620 zfcp_get_busid_by_adapter(adapter));
621 break;
622 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
623 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
624 zfcp_get_busid_by_adapter(adapter));
625 break;
626 default:
627 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
628 "(warning: unknown reason code %d)\n",
629 zfcp_get_busid_by_adapter(adapter),
630 link_down->error_code);
631 }
632
633 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
634 ZFCP_LOG_DEBUG("Debug information to link down: "
635 "primary_status=0x%02x "
636 "ioerr_code=0x%02x "
637 "action_code=0x%02x "
638 "reason_code=0x%02x "
639 "explanation_code=0x%02x "
640 "vendor_specific_code=0x%02x\n",
641 link_down->primary_status,
642 link_down->ioerr_code,
643 link_down->action_code,
644 link_down->reason_code,
645 link_down->explanation_code,
646 link_down->vendor_specific_code);
647
648 switch (link_down->error_code) {
649 case FSF_PSQ_LINK_NO_LIGHT:
650 case FSF_PSQ_LINK_WRAP_PLUG:
651 case FSF_PSQ_LINK_NO_FCP:
652 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
653 zfcp_erp_adapter_reopen(adapter, 0);
654 break;
655 default:
656 zfcp_erp_adapter_failed(adapter);
657 }
658 }
659
660 /*
661 * function: zfcp_fsf_req_dispatch
662 *
663 * purpose: calls the appropriate command specific handler
664 *
665 * returns:
666 */
667 static int
668 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
669 {
670 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
671 struct zfcp_adapter *adapter = fsf_req->adapter;
672 int retval = 0;
673
674
675 switch (fsf_req->fsf_command) {
676
677 case FSF_QTCB_FCP_CMND:
678 zfcp_fsf_send_fcp_command_handler(fsf_req);
679 break;
680
681 case FSF_QTCB_ABORT_FCP_CMND:
682 zfcp_fsf_abort_fcp_command_handler(fsf_req);
683 break;
684
685 case FSF_QTCB_SEND_GENERIC:
686 zfcp_fsf_send_ct_handler(fsf_req);
687 break;
688
689 case FSF_QTCB_OPEN_PORT_WITH_DID:
690 zfcp_fsf_open_port_handler(fsf_req);
691 break;
692
693 case FSF_QTCB_OPEN_LUN:
694 zfcp_fsf_open_unit_handler(fsf_req);
695 break;
696
697 case FSF_QTCB_CLOSE_LUN:
698 zfcp_fsf_close_unit_handler(fsf_req);
699 break;
700
701 case FSF_QTCB_CLOSE_PORT:
702 zfcp_fsf_close_port_handler(fsf_req);
703 break;
704
705 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
706 zfcp_fsf_close_physical_port_handler(fsf_req);
707 break;
708
709 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
710 zfcp_fsf_exchange_config_data_handler(fsf_req);
711 break;
712
713 case FSF_QTCB_EXCHANGE_PORT_DATA:
714 zfcp_fsf_exchange_port_data_handler(fsf_req);
715 break;
716
717 case FSF_QTCB_SEND_ELS:
718 zfcp_fsf_send_els_handler(fsf_req);
719 break;
720
721 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
722 zfcp_fsf_control_file_handler(fsf_req);
723 break;
724
725 case FSF_QTCB_UPLOAD_CONTROL_FILE:
726 zfcp_fsf_control_file_handler(fsf_req);
727 break;
728
729 default:
730 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
731 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
732 "not supported by the adapter %s\n",
733 zfcp_get_busid_by_adapter(adapter));
734 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
735 ZFCP_LOG_NORMAL
736 ("bug: Command issued by the device driver differs "
737 "from the command returned by the adapter %s "
738 "(debug info 0x%x, 0x%x).\n",
739 zfcp_get_busid_by_adapter(adapter),
740 fsf_req->fsf_command,
741 fsf_req->qtcb->header.fsf_command);
742 }
743
744 if (!erp_action)
745 return retval;
746
747 zfcp_erp_async_handler(erp_action, 0);
748
749 return retval;
750 }
751
752 /*
753 * function: zfcp_fsf_status_read
754 *
755 * purpose: initiates a Status Read command at the specified adapter
756 *
757 * returns:
758 */
759 int
760 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
761 {
762 struct zfcp_fsf_req *fsf_req;
763 struct fsf_status_read_buffer *status_buffer;
764 unsigned long lock_flags;
765 volatile struct qdio_buffer_element *sbale;
766 int retval = 0;
767
768 /* setup new FSF request */
769 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
770 req_flags | ZFCP_REQ_NO_QTCB,
771 adapter->pool.fsf_req_status_read,
772 &lock_flags, &fsf_req);
773 if (retval < 0) {
774 ZFCP_LOG_INFO("error: Could not create unsolicited status "
775 "buffer for adapter %s.\n",
776 zfcp_get_busid_by_adapter(adapter));
777 goto failed_req_create;
778 }
779
780 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
781 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
782 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
783 fsf_req->sbale_curr = 2;
784
785 status_buffer =
786 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
787 if (!status_buffer) {
788 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
789 goto failed_buf;
790 }
791 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
792 fsf_req->data = (unsigned long) status_buffer;
793
794 /* insert pointer to respective buffer */
795 sbale = zfcp_qdio_sbale_curr(fsf_req);
796 sbale->addr = (void *) status_buffer;
797 sbale->length = sizeof(struct fsf_status_read_buffer);
798
799 /* start QDIO request for this FSF request */
800 retval = zfcp_fsf_req_send(fsf_req, NULL);
801 if (retval) {
802 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
803 "environment.\n");
804 goto failed_req_send;
805 }
806
807 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
808 zfcp_get_busid_by_adapter(adapter));
809 goto out;
810
811 failed_req_send:
812 mempool_free(status_buffer, adapter->pool.data_status_read);
813
814 failed_buf:
815 zfcp_fsf_req_free(fsf_req);
816 failed_req_create:
817 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
818 out:
819 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
820 return retval;
821 }
822
823 static int
824 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
825 {
826 struct fsf_status_read_buffer *status_buffer;
827 struct zfcp_adapter *adapter;
828 struct zfcp_port *port;
829 unsigned long flags;
830
831 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
832 adapter = fsf_req->adapter;
833
834 read_lock_irqsave(&zfcp_data.config_lock, flags);
835 list_for_each_entry(port, &adapter->port_list_head, list)
836 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
837 break;
838 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
839
840 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
841 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
842 "nonexisting port with d_id 0x%08x on "
843 "adapter %s. Ignored.\n",
844 status_buffer->d_id & ZFCP_DID_MASK,
845 zfcp_get_busid_by_adapter(adapter));
846 goto out;
847 }
848
849 switch (status_buffer->status_subtype) {
850
851 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
852 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
853 zfcp_erp_port_reopen(port, 0);
854 break;
855
856 case FSF_STATUS_READ_SUB_ERROR_PORT:
857 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
858 zfcp_erp_port_shutdown(port, 0);
859 break;
860
861 default:
862 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
863 debug_exception(adapter->erp_dbf, 0,
864 &status_buffer->status_subtype, sizeof (u32));
865 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
866 "for a reopen indication on port with "
867 "d_id 0x%08x on the adapter %s. "
868 "Ignored. (debug info 0x%x)\n",
869 status_buffer->d_id,
870 zfcp_get_busid_by_adapter(adapter),
871 status_buffer->status_subtype);
872 }
873 out:
874 return 0;
875 }
876
877 /*
878 * function: zfcp_fsf_status_read_handler
879 *
880 * purpose: is called for finished Open Port command
881 *
882 * returns:
883 */
884 static int
885 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
886 {
887 int retval = 0;
888 struct zfcp_adapter *adapter = fsf_req->adapter;
889 struct fsf_status_read_buffer *status_buffer =
890 (struct fsf_status_read_buffer *) fsf_req->data;
891
892 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
893 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
894 mempool_free(status_buffer, adapter->pool.data_status_read);
895 zfcp_fsf_req_free(fsf_req);
896 goto out;
897 }
898
899 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
900
901 switch (status_buffer->status_type) {
902
903 case FSF_STATUS_READ_PORT_CLOSED:
904 zfcp_fsf_status_read_port_closed(fsf_req);
905 break;
906
907 case FSF_STATUS_READ_INCOMING_ELS:
908 zfcp_fsf_incoming_els(fsf_req);
909 break;
910
911 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
912 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
913 zfcp_get_busid_by_adapter(adapter));
914 break;
915
916 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
917 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
918 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
919 (char *) status_buffer,
920 sizeof (struct fsf_status_read_buffer));
921 break;
922
923 case FSF_STATUS_READ_LINK_DOWN:
924 switch (status_buffer->status_subtype) {
925 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
926 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
927 zfcp_get_busid_by_adapter(adapter));
928 zfcp_fsf_link_down_info_eval(adapter,
929 (struct fsf_link_down_info *)
930 &status_buffer->payload);
931 break;
932 case FSF_STATUS_READ_SUB_FDISC_FAILED:
933 ZFCP_LOG_INFO("Local link to adapter %s is down "
934 "due to failed FDISC login\n",
935 zfcp_get_busid_by_adapter(adapter));
936 zfcp_fsf_link_down_info_eval(adapter,
937 (struct fsf_link_down_info *)
938 &status_buffer->payload);
939 break;
940 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
941 ZFCP_LOG_INFO("Local link to adapter %s is down "
942 "due to firmware update on adapter\n",
943 zfcp_get_busid_by_adapter(adapter));
944 zfcp_fsf_link_down_info_eval(adapter, NULL);
945 break;
946 default:
947 ZFCP_LOG_INFO("Local link to adapter %s is down "
948 "due to unknown reason\n",
949 zfcp_get_busid_by_adapter(adapter));
950 zfcp_fsf_link_down_info_eval(adapter, NULL);
951 };
952 break;
953
954 case FSF_STATUS_READ_LINK_UP:
955 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
956 "Restarting operations on this adapter\n",
957 zfcp_get_busid_by_adapter(adapter));
958 /* All ports should be marked as ready to run again */
959 zfcp_erp_modify_adapter_status(adapter,
960 ZFCP_STATUS_COMMON_RUNNING,
961 ZFCP_SET);
962 zfcp_erp_adapter_reopen(adapter,
963 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
964 | ZFCP_STATUS_COMMON_ERP_FAILED);
965 break;
966
967 case FSF_STATUS_READ_CFDC_UPDATED:
968 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
969 zfcp_get_busid_by_adapter(adapter));
970 zfcp_erp_adapter_access_changed(adapter);
971 break;
972
973 case FSF_STATUS_READ_CFDC_HARDENED:
974 switch (status_buffer->status_subtype) {
975 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
976 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
977 zfcp_get_busid_by_adapter(adapter));
978 break;
979 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
980 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
981 "to the secondary SE\n",
982 zfcp_get_busid_by_adapter(adapter));
983 break;
984 default:
985 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
986 zfcp_get_busid_by_adapter(adapter));
987 }
988 break;
989
990 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
991 debug_text_event(adapter->erp_dbf, 2, "unsol_features:");
992 ZFCP_LOG_INFO("List of supported features on adapter %s has "
993 "been changed from 0x%08X to 0x%08X\n",
994 zfcp_get_busid_by_adapter(adapter),
995 *(u32*) (status_buffer->payload + 4),
996 *(u32*) (status_buffer->payload));
997 adapter->adapter_features = *(u32*) status_buffer->payload;
998 break;
999
1000 default:
1001 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1002 "type was received (debug info 0x%x)\n",
1003 status_buffer->status_type);
1004 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1005 status_buffer);
1006 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1007 (char *) status_buffer,
1008 sizeof (struct fsf_status_read_buffer));
1009 break;
1010 }
1011 mempool_free(status_buffer, adapter->pool.data_status_read);
1012 zfcp_fsf_req_free(fsf_req);
1013 /*
1014 * recycle buffer and start new request repeat until outbound
1015 * queue is empty or adapter shutdown is requested
1016 */
1017 /*
1018 * FIXME(qdio):
1019 * we may wait in the req_create for 5s during shutdown, so
1020 * qdio_cleanup will have to wait at least that long before returning
1021 * with failure to allow us a proper cleanup under all circumstances
1022 */
1023 /*
1024 * FIXME:
1025 * allocation failure possible? (Is this code needed?)
1026 */
1027 retval = zfcp_fsf_status_read(adapter, 0);
1028 if (retval < 0) {
1029 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1030 "request for the adapter %s.\n",
1031 zfcp_get_busid_by_adapter(adapter));
1032 /* temporary fix to avoid status read buffer shortage */
1033 adapter->status_read_failed++;
1034 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1035 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1036 ZFCP_LOG_INFO("restart adapter %s due to status read "
1037 "buffer shortage\n",
1038 zfcp_get_busid_by_adapter(adapter));
1039 zfcp_erp_adapter_reopen(adapter, 0);
1040 }
1041 }
1042 out:
1043 return retval;
1044 }
1045
1046 /*
1047 * function: zfcp_fsf_abort_fcp_command
1048 *
1049 * purpose: tells FSF to abort a running SCSI command
1050 *
1051 * returns: address of initiated FSF request
1052 * NULL - request could not be initiated
1053 *
1054 * FIXME(design): should be watched by a timeout !!!
1055 * FIXME(design) shouldn't this be modified to return an int
1056 * also...don't know how though
1057 */
1058 struct zfcp_fsf_req *
1059 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1060 struct zfcp_adapter *adapter,
1061 struct zfcp_unit *unit, int req_flags)
1062 {
1063 volatile struct qdio_buffer_element *sbale;
1064 unsigned long lock_flags;
1065 struct zfcp_fsf_req *fsf_req = NULL;
1066 int retval = 0;
1067
1068 /* setup new FSF request */
1069 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1070 req_flags, adapter->pool.fsf_req_abort,
1071 &lock_flags, &fsf_req);
1072 if (retval < 0) {
1073 ZFCP_LOG_INFO("error: Failed to create an abort command "
1074 "request for lun 0x%016Lx on port 0x%016Lx "
1075 "on adapter %s.\n",
1076 unit->fcp_lun,
1077 unit->port->wwpn,
1078 zfcp_get_busid_by_adapter(adapter));
1079 goto out;
1080 }
1081
1082 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1083 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1084 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1085
1086 fsf_req->data = (unsigned long) unit;
1087
1088 /* set handles of unit and its parent port in QTCB */
1089 fsf_req->qtcb->header.lun_handle = unit->handle;
1090 fsf_req->qtcb->header.port_handle = unit->port->handle;
1091
1092 /* set handle of request which should be aborted */
1093 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1094
1095 /* start QDIO request for this FSF request */
1096
1097 zfcp_fsf_start_scsi_er_timer(adapter);
1098 retval = zfcp_fsf_req_send(fsf_req, NULL);
1099 if (retval) {
1100 del_timer(&adapter->scsi_er_timer);
1101 ZFCP_LOG_INFO("error: Failed to send abort command request "
1102 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1103 zfcp_get_busid_by_adapter(adapter),
1104 unit->port->wwpn, unit->fcp_lun);
1105 zfcp_fsf_req_free(fsf_req);
1106 fsf_req = NULL;
1107 goto out;
1108 }
1109
1110 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1111 "(adapter%s, port d_id=0x%08x, "
1112 "unit x%016Lx, old_req_id=0x%lx)\n",
1113 zfcp_get_busid_by_adapter(adapter),
1114 unit->port->d_id,
1115 unit->fcp_lun, old_req_id);
1116 out:
1117 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1118 return fsf_req;
1119 }
1120
1121 /*
1122 * function: zfcp_fsf_abort_fcp_command_handler
1123 *
1124 * purpose: is called for finished Abort FCP Command request
1125 *
1126 * returns:
1127 */
1128 static int
1129 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1130 {
1131 int retval = -EINVAL;
1132 struct zfcp_unit *unit;
1133 unsigned char status_qual =
1134 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1135
1136 del_timer(&new_fsf_req->adapter->scsi_er_timer);
1137
1138 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1139 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1140 goto skip_fsfstatus;
1141 }
1142
1143 unit = (struct zfcp_unit *) new_fsf_req->data;
1144
1145 /* evaluate FSF status in QTCB */
1146 switch (new_fsf_req->qtcb->header.fsf_status) {
1147
1148 case FSF_PORT_HANDLE_NOT_VALID:
1149 if (status_qual >> 4 != status_qual % 0xf) {
1150 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1151 "fsf_s_phand_nv0");
1152 /*
1153 * In this case a command that was sent prior to a port
1154 * reopen was aborted (handles are different). This is
1155 * fine.
1156 */
1157 } else {
1158 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1159 "port 0x%016Lx on adapter %s invalid. "
1160 "This may happen occasionally.\n",
1161 unit->port->handle,
1162 unit->port->wwpn,
1163 zfcp_get_busid_by_unit(unit));
1164 ZFCP_LOG_INFO("status qualifier:\n");
1165 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1166 (char *) &new_fsf_req->qtcb->header.
1167 fsf_status_qual,
1168 sizeof (union fsf_status_qual));
1169 /* Let's hope this sorts out the mess */
1170 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1171 "fsf_s_phand_nv1");
1172 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1173 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1174 }
1175 break;
1176
1177 case FSF_LUN_HANDLE_NOT_VALID:
1178 if (status_qual >> 4 != status_qual % 0xf) {
1179 /* 2 */
1180 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1181 "fsf_s_lhand_nv0");
1182 /*
1183 * In this case a command that was sent prior to a unit
1184 * reopen was aborted (handles are different).
1185 * This is fine.
1186 */
1187 } else {
1188 ZFCP_LOG_INFO
1189 ("Warning: Temporary LUN identifier 0x%x of LUN "
1190 "0x%016Lx on port 0x%016Lx on adapter %s is "
1191 "invalid. This may happen in rare cases. "
1192 "Trying to re-establish link.\n",
1193 unit->handle,
1194 unit->fcp_lun,
1195 unit->port->wwpn,
1196 zfcp_get_busid_by_unit(unit));
1197 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1198 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1199 (char *) &new_fsf_req->qtcb->header.
1200 fsf_status_qual,
1201 sizeof (union fsf_status_qual));
1202 /* Let's hope this sorts out the mess */
1203 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1204 "fsf_s_lhand_nv1");
1205 zfcp_erp_port_reopen(unit->port, 0);
1206 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1207 }
1208 break;
1209
1210 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1211 retval = 0;
1212 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1213 "fsf_s_no_exist");
1214 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1215 break;
1216
1217 case FSF_PORT_BOXED:
1218 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1219 "be reopened\n", unit->port->wwpn,
1220 zfcp_get_busid_by_unit(unit));
1221 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1222 "fsf_s_pboxed");
1223 zfcp_erp_port_boxed(unit->port);
1224 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1225 | ZFCP_STATUS_FSFREQ_RETRY;
1226 break;
1227
1228 case FSF_LUN_BOXED:
1229 ZFCP_LOG_INFO(
1230 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1231 "to be reopened\n",
1232 unit->fcp_lun, unit->port->wwpn,
1233 zfcp_get_busid_by_unit(unit));
1234 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1235 zfcp_erp_unit_boxed(unit);
1236 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1237 | ZFCP_STATUS_FSFREQ_RETRY;
1238 break;
1239
1240 case FSF_ADAPTER_STATUS_AVAILABLE:
1241 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1242 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1243 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1244 "fsf_sq_ltest");
1245 zfcp_test_link(unit->port);
1246 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1247 break;
1248 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1249 /* SCSI stack will escalate */
1250 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1251 "fsf_sq_ulp");
1252 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1253 break;
1254 default:
1255 ZFCP_LOG_NORMAL
1256 ("bug: Wrong status qualifier 0x%x arrived.\n",
1257 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1258 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1259 "fsf_sq_inval:");
1260 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1261 &new_fsf_req->qtcb->header.
1262 fsf_status_qual.word[0], sizeof (u32));
1263 break;
1264 }
1265 break;
1266
1267 case FSF_GOOD:
1268 retval = 0;
1269 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1270 break;
1271
1272 default:
1273 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1274 "(debug info 0x%x)\n",
1275 new_fsf_req->qtcb->header.fsf_status);
1276 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1277 "fsf_s_inval:");
1278 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1279 &new_fsf_req->qtcb->header.fsf_status,
1280 sizeof (u32));
1281 break;
1282 }
1283 skip_fsfstatus:
1284 return retval;
1285 }
1286
1287 /**
1288 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1289 * one SBALE
1290 * Two scatter-gather lists are passed, one for the reqeust and one for the
1291 * response.
1292 */
1293 static inline int
1294 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1295 struct scatterlist *resp, int resp_count)
1296 {
1297 return ((req_count == 1) &&
1298 (resp_count == 1) &&
1299 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1300 PAGE_MASK) ==
1301 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1302 req[0].length - 1) & PAGE_MASK)) &&
1303 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1304 PAGE_MASK) ==
1305 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1306 resp[0].length - 1) & PAGE_MASK)));
1307 }
1308
1309 /**
1310 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1311 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1312 * the request
1313 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1314 * a struct zfcp_fsf_req
1315 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1316 * is sent within error recovery
1317 */
1318 int
1319 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1320 struct zfcp_erp_action *erp_action)
1321 {
1322 volatile struct qdio_buffer_element *sbale;
1323 struct zfcp_port *port;
1324 struct zfcp_adapter *adapter;
1325 struct zfcp_fsf_req *fsf_req;
1326 unsigned long lock_flags;
1327 int bytes;
1328 int ret = 0;
1329
1330 port = ct->port;
1331 adapter = port->adapter;
1332
1333 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1334 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1335 pool, &lock_flags, &fsf_req);
1336 if (ret < 0) {
1337 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1338 "adapter: %s\n",
1339 zfcp_get_busid_by_adapter(adapter));
1340 goto failed_req;
1341 }
1342
1343 if (erp_action != NULL) {
1344 erp_action->fsf_req = fsf_req;
1345 fsf_req->erp_action = erp_action;
1346 }
1347
1348 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1349 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1350 ct->resp, ct->resp_count)){
1351 /* both request buffer and response buffer
1352 fit into one sbale each */
1353 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1354 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1355 sbale[2].length = ct->req[0].length;
1356 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1357 sbale[3].length = ct->resp[0].length;
1358 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1359 } else if (adapter->adapter_features &
1360 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1361 /* try to use chained SBALs */
1362 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1363 SBAL_FLAGS0_TYPE_WRITE_READ,
1364 ct->req, ct->req_count,
1365 ZFCP_MAX_SBALS_PER_CT_REQ);
1366 if (bytes <= 0) {
1367 ZFCP_LOG_INFO("error: creation of CT request failed "
1368 "on adapter %s\n",
1369 zfcp_get_busid_by_adapter(adapter));
1370 if (bytes == 0)
1371 ret = -ENOMEM;
1372 else
1373 ret = bytes;
1374
1375 goto failed_send;
1376 }
1377 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1378 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1379 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1380 SBAL_FLAGS0_TYPE_WRITE_READ,
1381 ct->resp, ct->resp_count,
1382 ZFCP_MAX_SBALS_PER_CT_REQ);
1383 if (bytes <= 0) {
1384 ZFCP_LOG_INFO("error: creation of CT request failed "
1385 "on adapter %s\n",
1386 zfcp_get_busid_by_adapter(adapter));
1387 if (bytes == 0)
1388 ret = -ENOMEM;
1389 else
1390 ret = bytes;
1391
1392 goto failed_send;
1393 }
1394 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1395 } else {
1396 /* reject send generic request */
1397 ZFCP_LOG_INFO(
1398 "error: microcode does not support chained SBALs,"
1399 "CT request too big (adapter %s)\n",
1400 zfcp_get_busid_by_adapter(adapter));
1401 ret = -EOPNOTSUPP;
1402 goto failed_send;
1403 }
1404
1405 /* settings in QTCB */
1406 fsf_req->qtcb->header.port_handle = port->handle;
1407 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1408 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1409 fsf_req->data = (unsigned long) ct;
1410
1411 zfcp_san_dbf_event_ct_request(fsf_req);
1412
1413 /* start QDIO request for this FSF request */
1414 ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1415 if (ret) {
1416 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1417 "(adapter %s, port 0x%016Lx)\n",
1418 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1419 goto failed_send;
1420 }
1421
1422 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1423 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1424 goto out;
1425
1426 failed_send:
1427 zfcp_fsf_req_free(fsf_req);
1428 if (erp_action != NULL) {
1429 erp_action->fsf_req = NULL;
1430 }
1431 failed_req:
1432 out:
1433 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1434 lock_flags);
1435 return ret;
1436 }
1437
1438 /**
1439 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1440 * @fsf_req: pointer to struct zfcp_fsf_req
1441 *
1442 * Data specific for the Generic Service request is passed using
1443 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1444 * Usually a specific handler for the CT request is called which is
1445 * found in this structure.
1446 */
1447 static int
1448 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1449 {
1450 struct zfcp_port *port;
1451 struct zfcp_adapter *adapter;
1452 struct zfcp_send_ct *send_ct;
1453 struct fsf_qtcb_header *header;
1454 struct fsf_qtcb_bottom_support *bottom;
1455 int retval = -EINVAL;
1456 u16 subtable, rule, counter;
1457
1458 adapter = fsf_req->adapter;
1459 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1460 port = send_ct->port;
1461 header = &fsf_req->qtcb->header;
1462 bottom = &fsf_req->qtcb->bottom.support;
1463
1464 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1465 goto skip_fsfstatus;
1466
1467 /* evaluate FSF status in QTCB */
1468 switch (header->fsf_status) {
1469
1470 case FSF_GOOD:
1471 zfcp_san_dbf_event_ct_response(fsf_req);
1472 retval = 0;
1473 break;
1474
1475 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1476 if (adapter->fc_service_class <= 3) {
1477 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1478 "class %d.\n",
1479 zfcp_get_busid_by_port(port),
1480 adapter->fc_service_class);
1481 } else {
1482 ZFCP_LOG_INFO("bug: The fibre channel class at the "
1483 "adapter %s is invalid. "
1484 "(debug info %d)\n",
1485 zfcp_get_busid_by_port(port),
1486 adapter->fc_service_class);
1487 }
1488 /* stop operation for this adapter */
1489 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1490 zfcp_erp_adapter_shutdown(adapter, 0);
1491 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1492 break;
1493
1494 case FSF_ADAPTER_STATUS_AVAILABLE:
1495 switch (header->fsf_status_qual.word[0]){
1496 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1497 /* reopening link to port */
1498 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1499 zfcp_test_link(port);
1500 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1501 break;
1502 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1503 /* ERP strategy will escalate */
1504 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1505 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1506 break;
1507 default:
1508 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1509 "arrived.\n",
1510 header->fsf_status_qual.word[0]);
1511 break;
1512 }
1513 break;
1514
1515 case FSF_ACCESS_DENIED:
1516 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1517 "command (adapter %s, port d_id=0x%08x)\n",
1518 zfcp_get_busid_by_port(port), port->d_id);
1519 for (counter = 0; counter < 2; counter++) {
1520 subtable = header->fsf_status_qual.halfword[counter * 2];
1521 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1522 switch (subtable) {
1523 case FSF_SQ_CFDC_SUBTABLE_OS:
1524 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1525 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1526 case FSF_SQ_CFDC_SUBTABLE_LUN:
1527 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1528 zfcp_act_subtable_type[subtable], rule);
1529 break;
1530 }
1531 }
1532 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1533 zfcp_erp_port_access_denied(port);
1534 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1535 break;
1536
1537 case FSF_GENERIC_COMMAND_REJECTED:
1538 ZFCP_LOG_INFO("generic service command rejected "
1539 "(adapter %s, port d_id=0x%08x)\n",
1540 zfcp_get_busid_by_port(port), port->d_id);
1541 ZFCP_LOG_INFO("status qualifier:\n");
1542 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1543 (char *) &header->fsf_status_qual,
1544 sizeof (union fsf_status_qual));
1545 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1546 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1547 break;
1548
1549 case FSF_PORT_HANDLE_NOT_VALID:
1550 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1551 "0x%016Lx on adapter %s invalid. This may "
1552 "happen occasionally.\n", port->handle,
1553 port->wwpn, zfcp_get_busid_by_port(port));
1554 ZFCP_LOG_INFO("status qualifier:\n");
1555 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1556 (char *) &header->fsf_status_qual,
1557 sizeof (union fsf_status_qual));
1558 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1559 zfcp_erp_adapter_reopen(adapter, 0);
1560 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1561 break;
1562
1563 case FSF_PORT_BOXED:
1564 ZFCP_LOG_INFO("port needs to be reopened "
1565 "(adapter %s, port d_id=0x%08x)\n",
1566 zfcp_get_busid_by_port(port), port->d_id);
1567 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1568 zfcp_erp_port_boxed(port);
1569 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1570 | ZFCP_STATUS_FSFREQ_RETRY;
1571 break;
1572
1573 /* following states should never occure, all cases avoided
1574 in zfcp_fsf_send_ct - but who knows ... */
1575 case FSF_PAYLOAD_SIZE_MISMATCH:
1576 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1577 "req_buf_length=%d, resp_buf_length=%d)\n",
1578 zfcp_get_busid_by_adapter(adapter),
1579 bottom->req_buf_length, bottom->resp_buf_length);
1580 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1581 break;
1582 case FSF_REQUEST_SIZE_TOO_LARGE:
1583 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1584 "req_buf_length=%d)\n",
1585 zfcp_get_busid_by_adapter(adapter),
1586 bottom->req_buf_length);
1587 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588 break;
1589 case FSF_RESPONSE_SIZE_TOO_LARGE:
1590 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1591 "resp_buf_length=%d)\n",
1592 zfcp_get_busid_by_adapter(adapter),
1593 bottom->resp_buf_length);
1594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595 break;
1596 case FSF_SBAL_MISMATCH:
1597 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1598 "resp_buf_length=%d)\n",
1599 zfcp_get_busid_by_adapter(adapter),
1600 bottom->req_buf_length, bottom->resp_buf_length);
1601 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1602 break;
1603
1604 default:
1605 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1606 "(debug info 0x%x)\n", header->fsf_status);
1607 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1608 debug_exception(adapter->erp_dbf, 0,
1609 &header->fsf_status_qual.word[0], sizeof (u32));
1610 break;
1611 }
1612
1613 skip_fsfstatus:
1614 send_ct->status = retval;
1615
1616 if (send_ct->handler != NULL)
1617 send_ct->handler(send_ct->handler_data);
1618
1619 return retval;
1620 }
1621
1622 /**
1623 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1624 * @els: pointer to struct zfcp_send_els which contains all needed data for
1625 * the command.
1626 */
1627 int
1628 zfcp_fsf_send_els(struct zfcp_send_els *els)
1629 {
1630 volatile struct qdio_buffer_element *sbale;
1631 struct zfcp_fsf_req *fsf_req;
1632 u32 d_id;
1633 struct zfcp_adapter *adapter;
1634 unsigned long lock_flags;
1635 int bytes;
1636 int ret = 0;
1637
1638 d_id = els->d_id;
1639 adapter = els->adapter;
1640
1641 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1642 ZFCP_REQ_AUTO_CLEANUP,
1643 NULL, &lock_flags, &fsf_req);
1644 if (ret < 0) {
1645 ZFCP_LOG_INFO("error: creation of ELS request failed "
1646 "(adapter %s, port d_id: 0x%08x)\n",
1647 zfcp_get_busid_by_adapter(adapter), d_id);
1648 goto failed_req;
1649 }
1650
1651 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1652 if (zfcp_use_one_sbal(els->req, els->req_count,
1653 els->resp, els->resp_count)){
1654 /* both request buffer and response buffer
1655 fit into one sbale each */
1656 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1657 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1658 sbale[2].length = els->req[0].length;
1659 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1660 sbale[3].length = els->resp[0].length;
1661 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1662 } else if (adapter->adapter_features &
1663 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1664 /* try to use chained SBALs */
1665 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1666 SBAL_FLAGS0_TYPE_WRITE_READ,
1667 els->req, els->req_count,
1668 ZFCP_MAX_SBALS_PER_ELS_REQ);
1669 if (bytes <= 0) {
1670 ZFCP_LOG_INFO("error: creation of ELS request failed "
1671 "(adapter %s, port d_id: 0x%08x)\n",
1672 zfcp_get_busid_by_adapter(adapter), d_id);
1673 if (bytes == 0) {
1674 ret = -ENOMEM;
1675 } else {
1676 ret = bytes;
1677 }
1678 goto failed_send;
1679 }
1680 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1681 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1682 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1683 SBAL_FLAGS0_TYPE_WRITE_READ,
1684 els->resp, els->resp_count,
1685 ZFCP_MAX_SBALS_PER_ELS_REQ);
1686 if (bytes <= 0) {
1687 ZFCP_LOG_INFO("error: creation of ELS request failed "
1688 "(adapter %s, port d_id: 0x%08x)\n",
1689 zfcp_get_busid_by_adapter(adapter), d_id);
1690 if (bytes == 0) {
1691 ret = -ENOMEM;
1692 } else {
1693 ret = bytes;
1694 }
1695 goto failed_send;
1696 }
1697 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1698 } else {
1699 /* reject request */
1700 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1701 ", ELS request too big (adapter %s, "
1702 "port d_id: 0x%08x)\n",
1703 zfcp_get_busid_by_adapter(adapter), d_id);
1704 ret = -EOPNOTSUPP;
1705 goto failed_send;
1706 }
1707
1708 /* settings in QTCB */
1709 fsf_req->qtcb->bottom.support.d_id = d_id;
1710 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1711 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1712 fsf_req->data = (unsigned long) els;
1713
1714 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1715
1716 zfcp_san_dbf_event_els_request(fsf_req);
1717
1718 /* start QDIO request for this FSF request */
1719 ret = zfcp_fsf_req_send(fsf_req, els->timer);
1720 if (ret) {
1721 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1722 "(adapter %s, port d_id: 0x%08x)\n",
1723 zfcp_get_busid_by_adapter(adapter), d_id);
1724 goto failed_send;
1725 }
1726
1727 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1728 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1729 goto out;
1730
1731 failed_send:
1732 zfcp_fsf_req_free(fsf_req);
1733
1734 failed_req:
1735 out:
1736 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1737 lock_flags);
1738
1739 return ret;
1740 }
1741
1742 /**
1743 * zfcp_fsf_send_els_handler - handler for ELS commands
1744 * @fsf_req: pointer to struct zfcp_fsf_req
1745 *
1746 * Data specific for the ELS command is passed using
1747 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1748 * Usually a specific handler for the ELS command is called which is
1749 * found in this structure.
1750 */
1751 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1752 {
1753 struct zfcp_adapter *adapter;
1754 struct zfcp_port *port;
1755 u32 d_id;
1756 struct fsf_qtcb_header *header;
1757 struct fsf_qtcb_bottom_support *bottom;
1758 struct zfcp_send_els *send_els;
1759 int retval = -EINVAL;
1760 u16 subtable, rule, counter;
1761
1762 send_els = (struct zfcp_send_els *) fsf_req->data;
1763 adapter = send_els->adapter;
1764 port = send_els->port;
1765 d_id = send_els->d_id;
1766 header = &fsf_req->qtcb->header;
1767 bottom = &fsf_req->qtcb->bottom.support;
1768
1769 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1770 goto skip_fsfstatus;
1771
1772 switch (header->fsf_status) {
1773
1774 case FSF_GOOD:
1775 zfcp_san_dbf_event_els_response(fsf_req);
1776 retval = 0;
1777 break;
1778
1779 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1780 if (adapter->fc_service_class <= 3) {
1781 ZFCP_LOG_INFO("error: adapter %s does "
1782 "not support fibrechannel class %d.\n",
1783 zfcp_get_busid_by_adapter(adapter),
1784 adapter->fc_service_class);
1785 } else {
1786 ZFCP_LOG_INFO("bug: The fibrechannel class at "
1787 "adapter %s is invalid. "
1788 "(debug info %d)\n",
1789 zfcp_get_busid_by_adapter(adapter),
1790 adapter->fc_service_class);
1791 }
1792 /* stop operation for this adapter */
1793 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1794 zfcp_erp_adapter_shutdown(adapter, 0);
1795 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1796 break;
1797
1798 case FSF_ADAPTER_STATUS_AVAILABLE:
1799 switch (header->fsf_status_qual.word[0]){
1800 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1801 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1802 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1803 zfcp_test_link(port);
1804 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1805 break;
1806 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1807 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1809 retval =
1810 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1811 (struct zfcp_ls_rjt_par *)
1812 &header->fsf_status_qual.word[2]);
1813 break;
1814 case FSF_SQ_RETRY_IF_POSSIBLE:
1815 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1816 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1817 break;
1818 default:
1819 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1820 header->fsf_status_qual.word[0]);
1821 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1822 (char*)header->fsf_status_qual.word, 16);
1823 }
1824 break;
1825
1826 case FSF_ELS_COMMAND_REJECTED:
1827 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1828 "prohibited sending "
1829 "(adapter: %s, port d_id: 0x%08x)\n",
1830 zfcp_get_busid_by_adapter(adapter), d_id);
1831
1832 break;
1833
1834 case FSF_PAYLOAD_SIZE_MISMATCH:
1835 ZFCP_LOG_INFO(
1836 "ELS request size and ELS response size must be either "
1837 "both 0, or both greater than 0 "
1838 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1839 zfcp_get_busid_by_adapter(adapter),
1840 bottom->req_buf_length,
1841 bottom->resp_buf_length);
1842 break;
1843
1844 case FSF_REQUEST_SIZE_TOO_LARGE:
1845 ZFCP_LOG_INFO(
1846 "Length of the ELS request buffer, "
1847 "specified in QTCB bottom, "
1848 "exceeds the size of the buffers "
1849 "that have been allocated for ELS request data "
1850 "(adapter: %s, req_buf_length=%d)\n",
1851 zfcp_get_busid_by_adapter(adapter),
1852 bottom->req_buf_length);
1853 break;
1854
1855 case FSF_RESPONSE_SIZE_TOO_LARGE:
1856 ZFCP_LOG_INFO(
1857 "Length of the ELS response buffer, "
1858 "specified in QTCB bottom, "
1859 "exceeds the size of the buffers "
1860 "that have been allocated for ELS response data "
1861 "(adapter: %s, resp_buf_length=%d)\n",
1862 zfcp_get_busid_by_adapter(adapter),
1863 bottom->resp_buf_length);
1864 break;
1865
1866 case FSF_SBAL_MISMATCH:
1867 /* should never occure, avoided in zfcp_fsf_send_els */
1868 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1869 "resp_buf_length=%d)\n",
1870 zfcp_get_busid_by_adapter(adapter),
1871 bottom->req_buf_length, bottom->resp_buf_length);
1872 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1873 break;
1874
1875 case FSF_ACCESS_DENIED:
1876 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1877 "(adapter %s, port d_id=0x%08x)\n",
1878 zfcp_get_busid_by_adapter(adapter), d_id);
1879 for (counter = 0; counter < 2; counter++) {
1880 subtable = header->fsf_status_qual.halfword[counter * 2];
1881 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1882 switch (subtable) {
1883 case FSF_SQ_CFDC_SUBTABLE_OS:
1884 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1885 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1886 case FSF_SQ_CFDC_SUBTABLE_LUN:
1887 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1888 zfcp_act_subtable_type[subtable], rule);
1889 break;
1890 }
1891 }
1892 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1893 if (port != NULL)
1894 zfcp_erp_port_access_denied(port);
1895 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1896 break;
1897
1898 default:
1899 ZFCP_LOG_NORMAL(
1900 "bug: An unknown FSF Status was presented "
1901 "(adapter: %s, fsf_status=0x%08x)\n",
1902 zfcp_get_busid_by_adapter(adapter),
1903 header->fsf_status);
1904 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1905 debug_exception(adapter->erp_dbf, 0,
1906 &header->fsf_status_qual.word[0], sizeof(u32));
1907 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 break;
1909 }
1910
1911 skip_fsfstatus:
1912 send_els->status = retval;
1913
1914 if (send_els->handler != 0)
1915 send_els->handler(send_els->handler_data);
1916
1917 return retval;
1918 }
1919
1920 /*
1921 * function:
1922 *
1923 * purpose:
1924 *
1925 * returns: address of initiated FSF request
1926 * NULL - request could not be initiated
1927 */
1928 int
1929 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1930 {
1931 volatile struct qdio_buffer_element *sbale;
1932 unsigned long lock_flags;
1933 int retval = 0;
1934
1935 /* setup new FSF request */
1936 retval = zfcp_fsf_req_create(erp_action->adapter,
1937 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1938 ZFCP_REQ_AUTO_CLEANUP,
1939 erp_action->adapter->pool.fsf_req_erp,
1940 &lock_flags, &(erp_action->fsf_req));
1941 if (retval < 0) {
1942 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1943 "data request for adapter %s.\n",
1944 zfcp_get_busid_by_adapter(erp_action->adapter));
1945 goto out;
1946 }
1947
1948 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
1949 erp_action->fsf_req->sbal_curr, 0);
1950 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1951 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1952
1953 erp_action->fsf_req->erp_action = erp_action;
1954 erp_action->fsf_req->qtcb->bottom.config.feature_selection =
1955 FSF_FEATURE_CFDC |
1956 FSF_FEATURE_LUN_SHARING |
1957 FSF_FEATURE_UPDATE_ALERT;
1958
1959 /* start QDIO request for this FSF request */
1960 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
1961 if (retval) {
1962 ZFCP_LOG_INFO
1963 ("error: Could not send exchange configuration data "
1964 "command on the adapter %s\n",
1965 zfcp_get_busid_by_adapter(erp_action->adapter));
1966 zfcp_fsf_req_free(erp_action->fsf_req);
1967 erp_action->fsf_req = NULL;
1968 goto out;
1969 }
1970
1971 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1972 "(adapter %s)\n",
1973 zfcp_get_busid_by_adapter(erp_action->adapter));
1974
1975 out:
1976 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
1977 lock_flags);
1978 return retval;
1979 }
1980
1981 /**
1982 * zfcp_fsf_exchange_config_evaluate
1983 * @fsf_req: fsf_req which belongs to xchg config data request
1984 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1985 *
1986 * returns: -EIO on error, 0 otherwise
1987 */
1988 static int
1989 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1990 {
1991 struct fsf_qtcb_bottom_config *bottom;
1992 struct zfcp_adapter *adapter = fsf_req->adapter;
1993 struct Scsi_Host *shost = adapter->scsi_host;
1994
1995 bottom = &fsf_req->qtcb->bottom.config;
1996 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
1997 bottom->low_qtcb_version, bottom->high_qtcb_version);
1998 adapter->fsf_lic_version = bottom->lic_version;
1999 adapter->adapter_features = bottom->adapter_features;
2000 adapter->connection_features = bottom->connection_features;
2001 adapter->peer_wwpn = 0;
2002 adapter->peer_wwnn = 0;
2003 adapter->peer_d_id = 0;
2004
2005 if (xchg_ok) {
2006 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
2007 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
2008 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
2009 fc_host_speed(shost) = bottom->fc_link_speed;
2010 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
2011 adapter->fc_topology = bottom->fc_topology;
2012 adapter->hydra_version = bottom->adapter_type;
2013 if (adapter->physical_wwpn == 0)
2014 adapter->physical_wwpn = fc_host_port_name(shost);
2015 if (adapter->physical_s_id == 0)
2016 adapter->physical_s_id = fc_host_port_id(shost);
2017 } else {
2018 fc_host_node_name(shost) = 0;
2019 fc_host_port_name(shost) = 0;
2020 fc_host_port_id(shost) = 0;
2021 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
2022 adapter->fc_topology = 0;
2023 adapter->hydra_version = 0;
2024 }
2025
2026 if (adapter->fc_topology == FSF_TOPO_P2P) {
2027 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2028 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2029 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2030 }
2031
2032 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
2033 adapter->hardware_version = bottom->hardware_version;
2034 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2035 min(FC_SERIAL_NUMBER_SIZE, 17));
2036 EBCASC(fc_host_serial_number(shost),
2037 min(FC_SERIAL_NUMBER_SIZE, 17));
2038 }
2039
2040 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
2041 "WWNN 0x%016Lx, "
2042 "WWPN 0x%016Lx, "
2043 "S_ID 0x%08x,\n"
2044 "adapter version 0x%x, "
2045 "LIC version 0x%x, "
2046 "FC link speed %d Gb/s\n",
2047 zfcp_get_busid_by_adapter(adapter),
2048 (wwn_t) fc_host_node_name(shost),
2049 (wwn_t) fc_host_port_name(shost),
2050 fc_host_port_id(shost),
2051 adapter->hydra_version,
2052 adapter->fsf_lic_version,
2053 fc_host_speed(shost));
2054 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2055 ZFCP_LOG_NORMAL("error: the adapter %s "
2056 "only supports newer control block "
2057 "versions in comparison to this device "
2058 "driver (try updated device driver)\n",
2059 zfcp_get_busid_by_adapter(adapter));
2060 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2061 zfcp_erp_adapter_shutdown(adapter, 0);
2062 return -EIO;
2063 }
2064 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2065 ZFCP_LOG_NORMAL("error: the adapter %s "
2066 "only supports older control block "
2067 "versions than this device driver uses"
2068 "(consider a microcode upgrade)\n",
2069 zfcp_get_busid_by_adapter(adapter));
2070 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2071 zfcp_erp_adapter_shutdown(adapter, 0);
2072 return -EIO;
2073 }
2074 return 0;
2075 }
2076
2077 /*
2078 * function: zfcp_fsf_exchange_config_data_handler
2079 *
2080 * purpose: is called for finished Exchange Configuration Data command
2081 *
2082 * returns:
2083 */
2084 static int
2085 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2086 {
2087 struct fsf_qtcb_bottom_config *bottom;
2088 struct zfcp_adapter *adapter = fsf_req->adapter;
2089 struct fsf_qtcb *qtcb = fsf_req->qtcb;
2090
2091 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2092 return -EIO;
2093
2094 switch (qtcb->header.fsf_status) {
2095
2096 case FSF_GOOD:
2097 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2098 return -EIO;
2099
2100 switch (adapter->fc_topology) {
2101 case FSF_TOPO_P2P:
2102 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2103 "configuration detected at adapter %s\n"
2104 "Peer WWNN 0x%016llx, "
2105 "peer WWPN 0x%016llx, "
2106 "peer d_id 0x%06x\n",
2107 zfcp_get_busid_by_adapter(adapter),
2108 adapter->peer_wwnn,
2109 adapter->peer_wwpn,
2110 adapter->peer_d_id);
2111 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2112 "top-p-to-p");
2113 break;
2114 case FSF_TOPO_AL:
2115 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2116 "topology detected at adapter %s "
2117 "unsupported, shutting down adapter\n",
2118 zfcp_get_busid_by_adapter(adapter));
2119 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2120 "top-al");
2121 zfcp_erp_adapter_shutdown(adapter, 0);
2122 return -EIO;
2123 case FSF_TOPO_FABRIC:
2124 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
2125 "network detected at adapter %s.\n",
2126 zfcp_get_busid_by_adapter(adapter));
2127 break;
2128 default:
2129 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2130 "reported by the exchange "
2131 "configuration command for "
2132 "the adapter %s is not "
2133 "of a type known to the zfcp "
2134 "driver, shutting down adapter\n",
2135 zfcp_get_busid_by_adapter(adapter));
2136 adapter->fc_topology = FSF_TOPO_ERROR;
2137 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2138 "unknown-topo");
2139 zfcp_erp_adapter_shutdown(adapter, 0);
2140 return -EIO;
2141 }
2142 bottom = &qtcb->bottom.config;
2143 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2144 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2145 "allowed by the adapter %s "
2146 "is lower than the minimum "
2147 "required by the driver (%ld bytes).\n",
2148 bottom->max_qtcb_size,
2149 zfcp_get_busid_by_adapter(adapter),
2150 sizeof(struct fsf_qtcb));
2151 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2152 "qtcb-size");
2153 debug_event(fsf_req->adapter->erp_dbf, 0,
2154 &bottom->max_qtcb_size, sizeof (u32));
2155 zfcp_erp_adapter_shutdown(adapter, 0);
2156 return -EIO;
2157 }
2158 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2159 &adapter->status);
2160 break;
2161 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2162 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2163
2164 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2165 return -EIO;
2166
2167 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
2168
2169 zfcp_fsf_link_down_info_eval(adapter,
2170 &qtcb->header.fsf_status_qual.link_down_info);
2171 break;
2172 default:
2173 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2174 debug_event(fsf_req->adapter->erp_dbf, 0,
2175 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2176 zfcp_erp_adapter_shutdown(adapter, 0);
2177 return -EIO;
2178 }
2179 return 0;
2180 }
2181
2182 /**
2183 * zfcp_fsf_exchange_port_data - request information about local port
2184 * @erp_action: ERP action for the adapter for which port data is requested
2185 * @adapter: for which port data is requested
2186 * @data: response to exchange port data request
2187 */
2188 int
2189 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action,
2190 struct zfcp_adapter *adapter,
2191 struct fsf_qtcb_bottom_port *data)
2192 {
2193 volatile struct qdio_buffer_element *sbale;
2194 int retval = 0;
2195 unsigned long lock_flags;
2196 struct zfcp_fsf_req *fsf_req;
2197 struct timer_list *timer;
2198
2199 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2200 ZFCP_LOG_INFO("error: exchange port data "
2201 "command not supported by adapter %s\n",
2202 zfcp_get_busid_by_adapter(adapter));
2203 return -EOPNOTSUPP;
2204 }
2205
2206 /* setup new FSF request */
2207 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2208 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0,
2209 0, &lock_flags, &fsf_req);
2210 if (retval < 0) {
2211 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2212 "exchange port data request for"
2213 "the adapter %s.\n",
2214 zfcp_get_busid_by_adapter(adapter));
2215 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2216 lock_flags);
2217 return retval;
2218 }
2219
2220 if (data)
2221 fsf_req->data = (unsigned long) data;
2222
2223 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2224 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2225 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2226
2227 if (erp_action) {
2228 erp_action->fsf_req = fsf_req;
2229 fsf_req->erp_action = erp_action;
2230 timer = &erp_action->timer;
2231 } else {
2232 timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC);
2233 if (!timer) {
2234 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2235 lock_flags);
2236 zfcp_fsf_req_free(fsf_req);
2237 return -ENOMEM;
2238 }
2239 init_timer(timer);
2240 timer->function = zfcp_fsf_request_timeout_handler;
2241 timer->data = (unsigned long) adapter;
2242 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2243 }
2244
2245 retval = zfcp_fsf_req_send(fsf_req, timer);
2246 if (retval) {
2247 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2248 "command on the adapter %s\n",
2249 zfcp_get_busid_by_adapter(adapter));
2250 zfcp_fsf_req_free(fsf_req);
2251 if (erp_action)
2252 erp_action->fsf_req = NULL;
2253 else
2254 kfree(timer);
2255 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2256 lock_flags);
2257 return retval;
2258 }
2259
2260 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2261
2262 if (!erp_action) {
2263 wait_event(fsf_req->completion_wq,
2264 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2265 del_timer_sync(timer);
2266 zfcp_fsf_req_free(fsf_req);
2267 kfree(timer);
2268 }
2269 return retval;
2270 }
2271
2272
2273 /**
2274 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2275 * @fsf_req: pointer to struct zfcp_fsf_req
2276 */
2277 static void
2278 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2279 {
2280 struct zfcp_adapter *adapter = fsf_req->adapter;
2281 struct Scsi_Host *shost = adapter->scsi_host;
2282 struct fsf_qtcb *qtcb = fsf_req->qtcb;
2283 struct fsf_qtcb_bottom_port *bottom, *data;
2284
2285 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2286 return;
2287
2288 switch (qtcb->header.fsf_status) {
2289 case FSF_GOOD:
2290 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2291
2292 bottom = &qtcb->bottom.port;
2293 data = (struct fsf_qtcb_bottom_port*) fsf_req->data;
2294 if (data)
2295 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port));
2296 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
2297 adapter->physical_wwpn = bottom->wwpn;
2298 adapter->physical_s_id = bottom->fc_port_id;
2299 } else {
2300 adapter->physical_wwpn = fc_host_port_name(shost);
2301 adapter->physical_s_id = fc_host_port_id(shost);
2302 }
2303 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
2304 break;
2305
2306 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2307 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2308
2309 zfcp_fsf_link_down_info_eval(adapter,
2310 &qtcb->header.fsf_status_qual.link_down_info);
2311 break;
2312
2313 default:
2314 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");
2315 debug_event(adapter->erp_dbf, 0,
2316 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2317 }
2318 }
2319
2320
2321 /*
2322 * function: zfcp_fsf_open_port
2323 *
2324 * purpose:
2325 *
2326 * returns: address of initiated FSF request
2327 * NULL - request could not be initiated
2328 */
2329 int
2330 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2331 {
2332 volatile struct qdio_buffer_element *sbale;
2333 unsigned long lock_flags;
2334 int retval = 0;
2335
2336 /* setup new FSF request */
2337 retval = zfcp_fsf_req_create(erp_action->adapter,
2338 FSF_QTCB_OPEN_PORT_WITH_DID,
2339 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2340 erp_action->adapter->pool.fsf_req_erp,
2341 &lock_flags, &(erp_action->fsf_req));
2342 if (retval < 0) {
2343 ZFCP_LOG_INFO("error: Could not create open port request "
2344 "for port 0x%016Lx on adapter %s.\n",
2345 erp_action->port->wwpn,
2346 zfcp_get_busid_by_adapter(erp_action->adapter));
2347 goto out;
2348 }
2349
2350 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2351 erp_action->fsf_req->sbal_curr, 0);
2352 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2353 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2354
2355 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2356 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2357 erp_action->fsf_req->data = (unsigned long) erp_action->port;
2358 erp_action->fsf_req->erp_action = erp_action;
2359
2360 /* start QDIO request for this FSF request */
2361 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2362 if (retval) {
2363 ZFCP_LOG_INFO("error: Could not send open port request for "
2364 "port 0x%016Lx on adapter %s.\n",
2365 erp_action->port->wwpn,
2366 zfcp_get_busid_by_adapter(erp_action->adapter));
2367 zfcp_fsf_req_free(erp_action->fsf_req);
2368 erp_action->fsf_req = NULL;
2369 goto out;
2370 }
2371
2372 ZFCP_LOG_DEBUG("open port request initiated "
2373 "(adapter %s, port 0x%016Lx)\n",
2374 zfcp_get_busid_by_adapter(erp_action->adapter),
2375 erp_action->port->wwpn);
2376 out:
2377 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2378 lock_flags);
2379 return retval;
2380 }
2381
2382 /*
2383 * function: zfcp_fsf_open_port_handler
2384 *
2385 * purpose: is called for finished Open Port command
2386 *
2387 * returns:
2388 */
2389 static int
2390 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2391 {
2392 int retval = -EINVAL;
2393 struct zfcp_port *port;
2394 struct fsf_plogi *plogi;
2395 struct fsf_qtcb_header *header;
2396 u16 subtable, rule, counter;
2397
2398 port = (struct zfcp_port *) fsf_req->data;
2399 header = &fsf_req->qtcb->header;
2400
2401 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2402 /* don't change port status in our bookkeeping */
2403 goto skip_fsfstatus;
2404 }
2405
2406 /* evaluate FSF status in QTCB */
2407 switch (header->fsf_status) {
2408
2409 case FSF_PORT_ALREADY_OPEN:
2410 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2411 "is already open.\n",
2412 port->wwpn, zfcp_get_busid_by_port(port));
2413 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2414 "fsf_s_popen");
2415 /*
2416 * This is a bug, however operation should continue normally
2417 * if it is simply ignored
2418 */
2419 break;
2420
2421 case FSF_ACCESS_DENIED:
2422 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2423 "on adapter %s\n",
2424 port->wwpn, zfcp_get_busid_by_port(port));
2425 for (counter = 0; counter < 2; counter++) {
2426 subtable = header->fsf_status_qual.halfword[counter * 2];
2427 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2428 switch (subtable) {
2429 case FSF_SQ_CFDC_SUBTABLE_OS:
2430 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2431 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2432 case FSF_SQ_CFDC_SUBTABLE_LUN:
2433 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2434 zfcp_act_subtable_type[subtable], rule);
2435 break;
2436 }
2437 }
2438 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2439 zfcp_erp_port_access_denied(port);
2440 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2441 break;
2442
2443 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2444 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2445 "The remote port 0x%016Lx on adapter %s "
2446 "could not be opened. Disabling it.\n",
2447 port->wwpn, zfcp_get_busid_by_port(port));
2448 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2449 "fsf_s_max_ports");
2450 zfcp_erp_port_failed(port);
2451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2452 break;
2453
2454 case FSF_ADAPTER_STATUS_AVAILABLE:
2455 switch (header->fsf_status_qual.word[0]) {
2456 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2457 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2458 "fsf_sq_ltest");
2459 /* ERP strategy will escalate */
2460 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2461 break;
2462 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2463 /* ERP strategy will escalate */
2464 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2465 "fsf_sq_ulp");
2466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2467 break;
2468 case FSF_SQ_NO_RETRY_POSSIBLE:
2469 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2470 "adapter %s could not be opened. "
2471 "Disabling it.\n",
2472 port->wwpn,
2473 zfcp_get_busid_by_port(port));
2474 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2475 "fsf_sq_no_retry");
2476 zfcp_erp_port_failed(port);
2477 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2478 break;
2479 default:
2480 ZFCP_LOG_NORMAL
2481 ("bug: Wrong status qualifier 0x%x arrived.\n",
2482 header->fsf_status_qual.word[0]);
2483 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2484 "fsf_sq_inval:");
2485 debug_exception(
2486 fsf_req->adapter->erp_dbf, 0,
2487 &header->fsf_status_qual.word[0],
2488 sizeof (u32));
2489 break;
2490 }
2491 break;
2492
2493 case FSF_GOOD:
2494 /* save port handle assigned by FSF */
2495 port->handle = header->port_handle;
2496 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2497 "was opened, it's port handle is 0x%x\n",
2498 port->wwpn, zfcp_get_busid_by_port(port),
2499 port->handle);
2500 /* mark port as open */
2501 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2502 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2503 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2504 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2505 &port->status);
2506 retval = 0;
2507 /* check whether D_ID has changed during open */
2508 /*
2509 * FIXME: This check is not airtight, as the FCP channel does
2510 * not monitor closures of target port connections caused on
2511 * the remote side. Thus, they might miss out on invalidating
2512 * locally cached WWPNs (and other N_Port parameters) of gone
2513 * target ports. So, our heroic attempt to make things safe
2514 * could be undermined by 'open port' response data tagged with
2515 * obsolete WWPNs. Another reason to monitor potential
2516 * connection closures ourself at least (by interpreting
2517 * incoming ELS' and unsolicited status). It just crosses my
2518 * mind that one should be able to cross-check by means of
2519 * another GID_PN straight after a port has been opened.
2520 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2521 */
2522 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2523 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2524 {
2525 if (fsf_req->qtcb->bottom.support.els1_length <
2526 ((((unsigned long) &plogi->serv_param.wwpn) -
2527 ((unsigned long) plogi)) + sizeof (u64))) {
2528 ZFCP_LOG_INFO(
2529 "warning: insufficient length of "
2530 "PLOGI payload (%i)\n",
2531 fsf_req->qtcb->bottom.support.els1_length);
2532 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2533 "fsf_s_short_plogi:");
2534 /* skip sanity check and assume wwpn is ok */
2535 } else {
2536 if (plogi->serv_param.wwpn != port->wwpn) {
2537 ZFCP_LOG_INFO("warning: d_id of port "
2538 "0x%016Lx changed during "
2539 "open\n", port->wwpn);
2540 debug_text_event(
2541 fsf_req->adapter->erp_dbf, 0,
2542 "fsf_s_did_change:");
2543 atomic_clear_mask(
2544 ZFCP_STATUS_PORT_DID_DID,
2545 &port->status);
2546 } else
2547 port->wwnn = plogi->serv_param.wwnn;
2548 }
2549 }
2550 break;
2551
2552 case FSF_UNKNOWN_OP_SUBTYPE:
2553 /* should never occure, subtype not set in zfcp_fsf_open_port */
2554 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2555 "op_subtype=0x%x)\n",
2556 zfcp_get_busid_by_port(port),
2557 fsf_req->qtcb->bottom.support.operation_subtype);
2558 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2559 break;
2560
2561 default:
2562 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2563 "(debug info 0x%x)\n",
2564 header->fsf_status);
2565 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2566 debug_exception(fsf_req->adapter->erp_dbf, 0,
2567 &header->fsf_status, sizeof (u32));
2568 break;
2569 }
2570
2571 skip_fsfstatus:
2572 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2573 return retval;
2574 }
2575
2576 /*
2577 * function: zfcp_fsf_close_port
2578 *
2579 * purpose: submit FSF command "close port"
2580 *
2581 * returns: address of initiated FSF request
2582 * NULL - request could not be initiated
2583 */
2584 int
2585 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2586 {
2587 volatile struct qdio_buffer_element *sbale;
2588 unsigned long lock_flags;
2589 int retval = 0;
2590
2591 /* setup new FSF request */
2592 retval = zfcp_fsf_req_create(erp_action->adapter,
2593 FSF_QTCB_CLOSE_PORT,
2594 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2595 erp_action->adapter->pool.fsf_req_erp,
2596 &lock_flags, &(erp_action->fsf_req));
2597 if (retval < 0) {
2598 ZFCP_LOG_INFO("error: Could not create a close port request "
2599 "for port 0x%016Lx on adapter %s.\n",
2600 erp_action->port->wwpn,
2601 zfcp_get_busid_by_adapter(erp_action->adapter));
2602 goto out;
2603 }
2604
2605 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2606 erp_action->fsf_req->sbal_curr, 0);
2607 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2608 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2609
2610 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2611 erp_action->fsf_req->data = (unsigned long) erp_action->port;
2612 erp_action->fsf_req->erp_action = erp_action;
2613 erp_action->fsf_req->qtcb->header.port_handle =
2614 erp_action->port->handle;
2615
2616 /* start QDIO request for this FSF request */
2617 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2618 if (retval) {
2619 ZFCP_LOG_INFO("error: Could not send a close port request for "
2620 "port 0x%016Lx on adapter %s.\n",
2621 erp_action->port->wwpn,
2622 zfcp_get_busid_by_adapter(erp_action->adapter));
2623 zfcp_fsf_req_free(erp_action->fsf_req);
2624 erp_action->fsf_req = NULL;
2625 goto out;
2626 }
2627
2628 ZFCP_LOG_TRACE("close port request initiated "
2629 "(adapter %s, port 0x%016Lx)\n",
2630 zfcp_get_busid_by_adapter(erp_action->adapter),
2631 erp_action->port->wwpn);
2632 out:
2633 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2634 lock_flags);
2635 return retval;
2636 }
2637
2638 /*
2639 * function: zfcp_fsf_close_port_handler
2640 *
2641 * purpose: is called for finished Close Port FSF command
2642 *
2643 * returns:
2644 */
2645 static int
2646 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2647 {
2648 int retval = -EINVAL;
2649 struct zfcp_port *port;
2650
2651 port = (struct zfcp_port *) fsf_req->data;
2652
2653 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2654 /* don't change port status in our bookkeeping */
2655 goto skip_fsfstatus;
2656 }
2657
2658 /* evaluate FSF status in QTCB */
2659 switch (fsf_req->qtcb->header.fsf_status) {
2660
2661 case FSF_PORT_HANDLE_NOT_VALID:
2662 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2663 "0x%016Lx on adapter %s invalid. This may happen "
2664 "occasionally.\n", port->handle,
2665 port->wwpn, zfcp_get_busid_by_port(port));
2666 ZFCP_LOG_DEBUG("status qualifier:\n");
2667 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2668 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2669 sizeof (union fsf_status_qual));
2670 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2671 "fsf_s_phand_nv");
2672 zfcp_erp_adapter_reopen(port->adapter, 0);
2673 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2674 break;
2675
2676 case FSF_ADAPTER_STATUS_AVAILABLE:
2677 /* Note: FSF has actually closed the port in this case.
2678 * The status code is just daft. Fingers crossed for a change
2679 */
2680 retval = 0;
2681 break;
2682
2683 case FSF_GOOD:
2684 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2685 "port handle 0x%x\n", port->wwpn,
2686 zfcp_get_busid_by_port(port), port->handle);
2687 zfcp_erp_modify_port_status(port,
2688 ZFCP_STATUS_COMMON_OPEN,
2689 ZFCP_CLEAR);
2690 retval = 0;
2691 break;
2692
2693 default:
2694 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2695 "(debug info 0x%x)\n",
2696 fsf_req->qtcb->header.fsf_status);
2697 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2698 debug_exception(fsf_req->adapter->erp_dbf, 0,
2699 &fsf_req->qtcb->header.fsf_status,
2700 sizeof (u32));
2701 break;
2702 }
2703
2704 skip_fsfstatus:
2705 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2706 return retval;
2707 }
2708
2709 /*
2710 * function: zfcp_fsf_close_physical_port
2711 *
2712 * purpose: submit FSF command "close physical port"
2713 *
2714 * returns: address of initiated FSF request
2715 * NULL - request could not be initiated
2716 */
2717 int
2718 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2719 {
2720 int retval = 0;
2721 unsigned long lock_flags;
2722 volatile struct qdio_buffer_element *sbale;
2723
2724 /* setup new FSF request */
2725 retval = zfcp_fsf_req_create(erp_action->adapter,
2726 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2727 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2728 erp_action->adapter->pool.fsf_req_erp,
2729 &lock_flags, &erp_action->fsf_req);
2730 if (retval < 0) {
2731 ZFCP_LOG_INFO("error: Could not create close physical port "
2732 "request (adapter %s, port 0x%016Lx)\n",
2733 zfcp_get_busid_by_adapter(erp_action->adapter),
2734 erp_action->port->wwpn);
2735
2736 goto out;
2737 }
2738
2739 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2740 erp_action->fsf_req->sbal_curr, 0);
2741 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2742 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2743
2744 /* mark port as being closed */
2745 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2746 &erp_action->port->status);
2747 /* save a pointer to this port */
2748 erp_action->fsf_req->data = (unsigned long) erp_action->port;
2749 /* port to be closed */
2750 erp_action->fsf_req->qtcb->header.port_handle =
2751 erp_action->port->handle;
2752 erp_action->fsf_req->erp_action = erp_action;
2753
2754 /* start QDIO request for this FSF request */
2755 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2756 if (retval) {
2757 ZFCP_LOG_INFO("error: Could not send close physical port "
2758 "request (adapter %s, port 0x%016Lx)\n",
2759 zfcp_get_busid_by_adapter(erp_action->adapter),
2760 erp_action->port->wwpn);
2761 zfcp_fsf_req_free(erp_action->fsf_req);
2762 erp_action->fsf_req = NULL;
2763 goto out;
2764 }
2765
2766 ZFCP_LOG_TRACE("close physical port request initiated "
2767 "(adapter %s, port 0x%016Lx)\n",
2768 zfcp_get_busid_by_adapter(erp_action->adapter),
2769 erp_action->port->wwpn);
2770 out:
2771 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2772 lock_flags);
2773 return retval;
2774 }
2775
2776 /*
2777 * function: zfcp_fsf_close_physical_port_handler
2778 *
2779 * purpose: is called for finished Close Physical Port FSF command
2780 *
2781 * returns:
2782 */
2783 static int
2784 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2785 {
2786 int retval = -EINVAL;
2787 struct zfcp_port *port;
2788 struct zfcp_unit *unit;
2789 struct fsf_qtcb_header *header;
2790 u16 subtable, rule, counter;
2791
2792 port = (struct zfcp_port *) fsf_req->data;
2793 header = &fsf_req->qtcb->header;
2794
2795 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2796 /* don't change port status in our bookkeeping */
2797 goto skip_fsfstatus;
2798 }
2799
2800 /* evaluate FSF status in QTCB */
2801 switch (header->fsf_status) {
2802
2803 case FSF_PORT_HANDLE_NOT_VALID:
2804 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2805 "(adapter %s, port 0x%016Lx). "
2806 "This may happen occasionally.\n",
2807 port->handle,
2808 zfcp_get_busid_by_port(port),
2809 port->wwpn);
2810 ZFCP_LOG_DEBUG("status qualifier:\n");
2811 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2812 (char *) &header->fsf_status_qual,
2813 sizeof (union fsf_status_qual));
2814 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2815 "fsf_s_phand_nv");
2816 zfcp_erp_adapter_reopen(port->adapter, 0);
2817 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2818 break;
2819
2820 case FSF_ACCESS_DENIED:
2821 ZFCP_LOG_NORMAL("Access denied, cannot close "
2822 "physical port 0x%016Lx on adapter %s\n",
2823 port->wwpn, zfcp_get_busid_by_port(port));
2824 for (counter = 0; counter < 2; counter++) {
2825 subtable = header->fsf_status_qual.halfword[counter * 2];
2826 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2827 switch (subtable) {
2828 case FSF_SQ_CFDC_SUBTABLE_OS:
2829 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2830 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2831 case FSF_SQ_CFDC_SUBTABLE_LUN:
2832 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2833 zfcp_act_subtable_type[subtable], rule);
2834 break;
2835 }
2836 }
2837 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2838 zfcp_erp_port_access_denied(port);
2839 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2840 break;
2841
2842 case FSF_PORT_BOXED:
2843 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2844 "%s needs to be reopened but it was attempted "
2845 "to close it physically.\n",
2846 port->wwpn,
2847 zfcp_get_busid_by_port(port));
2848 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2849 zfcp_erp_port_boxed(port);
2850 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2851 ZFCP_STATUS_FSFREQ_RETRY;
2852 break;
2853
2854 case FSF_ADAPTER_STATUS_AVAILABLE:
2855 switch (header->fsf_status_qual.word[0]) {
2856 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2857 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2858 "fsf_sq_ltest");
2859 /* This will now be escalated by ERP */
2860 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2861 break;
2862 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2863 /* ERP strategy will escalate */
2864 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2865 "fsf_sq_ulp");
2866 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2867 break;
2868 default:
2869 ZFCP_LOG_NORMAL
2870 ("bug: Wrong status qualifier 0x%x arrived.\n",
2871 header->fsf_status_qual.word[0]);
2872 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2873 "fsf_sq_inval:");
2874 debug_exception(
2875 fsf_req->adapter->erp_dbf, 0,
2876 &header->fsf_status_qual.word[0], sizeof (u32));
2877 break;
2878 }
2879 break;
2880
2881 case FSF_GOOD:
2882 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2883 "physically closed, port handle 0x%x\n",
2884 port->wwpn,
2885 zfcp_get_busid_by_port(port), port->handle);
2886 /* can't use generic zfcp_erp_modify_port_status because
2887 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2888 */
2889 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2890 list_for_each_entry(unit, &port->unit_list_head, list)
2891 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2892 retval = 0;
2893 break;
2894
2895 default:
2896 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2897 "(debug info 0x%x)\n",
2898 header->fsf_status);
2899 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2900 debug_exception(fsf_req->adapter->erp_dbf, 0,
2901 &header->fsf_status, sizeof (u32));
2902 break;
2903 }
2904
2905 skip_fsfstatus:
2906 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2907 return retval;
2908 }
2909
2910 /*
2911 * function: zfcp_fsf_open_unit
2912 *
2913 * purpose:
2914 *
2915 * returns:
2916 *
2917 * assumptions: This routine does not check whether the associated
2918 * remote port has already been opened. This should be
2919 * done by calling routines. Otherwise some status
2920 * may be presented by FSF
2921 */
2922 int
2923 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2924 {
2925 volatile struct qdio_buffer_element *sbale;
2926 unsigned long lock_flags;
2927 int retval = 0;
2928
2929 /* setup new FSF request */
2930 retval = zfcp_fsf_req_create(erp_action->adapter,
2931 FSF_QTCB_OPEN_LUN,
2932 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2933 erp_action->adapter->pool.fsf_req_erp,
2934 &lock_flags, &(erp_action->fsf_req));
2935 if (retval < 0) {
2936 ZFCP_LOG_INFO("error: Could not create open unit request for "
2937 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2938 erp_action->unit->fcp_lun,
2939 erp_action->unit->port->wwpn,
2940 zfcp_get_busid_by_adapter(erp_action->adapter));
2941 goto out;
2942 }
2943
2944 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2945 erp_action->fsf_req->sbal_curr, 0);
2946 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2947 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2948
2949 erp_action->fsf_req->qtcb->header.port_handle =
2950 erp_action->port->handle;
2951 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
2952 erp_action->unit->fcp_lun;
2953 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2954 erp_action->fsf_req->qtcb->bottom.support.option =
2955 FSF_OPEN_LUN_SUPPRESS_BOXING;
2956 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2957 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
2958 erp_action->fsf_req->erp_action = erp_action;
2959
2960 /* start QDIO request for this FSF request */
2961 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2962 if (retval) {
2963 ZFCP_LOG_INFO("error: Could not send an open unit request "
2964 "on the adapter %s, port 0x%016Lx for "
2965 "unit 0x%016Lx\n",
2966 zfcp_get_busid_by_adapter(erp_action->adapter),
2967 erp_action->port->wwpn,
2968 erp_action->unit->fcp_lun);
2969 zfcp_fsf_req_free(erp_action->fsf_req);
2970 erp_action->fsf_req = NULL;
2971 goto out;
2972 }
2973
2974 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2975 "port 0x%016Lx, unit 0x%016Lx)\n",
2976 zfcp_get_busid_by_adapter(erp_action->adapter),
2977 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2978 out:
2979 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2980 lock_flags);
2981 return retval;
2982 }
2983
2984 /*
2985 * function: zfcp_fsf_open_unit_handler
2986 *
2987 * purpose: is called for finished Open LUN command
2988 *
2989 * returns:
2990 */
2991 static int
2992 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2993 {
2994 int retval = -EINVAL;
2995 struct zfcp_adapter *adapter;
2996 struct zfcp_unit *unit;
2997 struct fsf_qtcb_header *header;
2998 struct fsf_qtcb_bottom_support *bottom;
2999 struct fsf_queue_designator *queue_designator;
3000 u16 subtable, rule, counter;
3001 int exclusive, readwrite;
3002
3003 unit = (struct zfcp_unit *) fsf_req->data;
3004
3005 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3006 /* don't change unit status in our bookkeeping */
3007 goto skip_fsfstatus;
3008 }
3009
3010 adapter = fsf_req->adapter;
3011 header = &fsf_req->qtcb->header;
3012 bottom = &fsf_req->qtcb->bottom.support;
3013 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3014
3015 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3016 ZFCP_STATUS_UNIT_SHARED |
3017 ZFCP_STATUS_UNIT_READONLY,
3018 &unit->status);
3019
3020 /* evaluate FSF status in QTCB */
3021 switch (header->fsf_status) {
3022
3023 case FSF_PORT_HANDLE_NOT_VALID:
3024 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3025 "for port 0x%016Lx on adapter %s invalid "
3026 "This may happen occasionally\n",
3027 unit->port->handle,
3028 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3029 ZFCP_LOG_DEBUG("status qualifier:\n");
3030 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3031 (char *) &header->fsf_status_qual,
3032 sizeof (union fsf_status_qual));
3033 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3034 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3035 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3036 break;
3037
3038 case FSF_LUN_ALREADY_OPEN:
3039 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3040 "remote port 0x%016Lx on adapter %s twice.\n",
3041 unit->fcp_lun,
3042 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3043 debug_text_exception(adapter->erp_dbf, 0,
3044 "fsf_s_uopen");
3045 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3046 break;
3047
3048 case FSF_ACCESS_DENIED:
3049 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3050 "remote port 0x%016Lx on adapter %s\n",
3051 unit->fcp_lun, unit->port->wwpn,
3052 zfcp_get_busid_by_unit(unit));
3053 for (counter = 0; counter < 2; counter++) {
3054 subtable = header->fsf_status_qual.halfword[counter * 2];
3055 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3056 switch (subtable) {
3057 case FSF_SQ_CFDC_SUBTABLE_OS:
3058 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3059 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3060 case FSF_SQ_CFDC_SUBTABLE_LUN:
3061 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3062 zfcp_act_subtable_type[subtable], rule);
3063 break;
3064 }
3065 }
3066 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3067 zfcp_erp_unit_access_denied(unit);
3068 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3069 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3070 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3071 break;
3072
3073 case FSF_PORT_BOXED:
3074 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3075 "needs to be reopened\n",
3076 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3077 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3078 zfcp_erp_port_boxed(unit->port);
3079 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3080 ZFCP_STATUS_FSFREQ_RETRY;
3081 break;
3082
3083 case FSF_LUN_SHARING_VIOLATION:
3084 if (header->fsf_status_qual.word[0] != 0) {
3085 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3086 "with WWPN 0x%Lx "
3087 "connected to the adapter %s "
3088 "is already in use in LPAR%d, CSS%d\n",
3089 unit->fcp_lun,
3090 unit->port->wwpn,
3091 zfcp_get_busid_by_unit(unit),
3092 queue_designator->hla,
3093 queue_designator->cssid);
3094 } else {
3095 subtable = header->fsf_status_qual.halfword[4];
3096 rule = header->fsf_status_qual.halfword[5];
3097 switch (subtable) {
3098 case FSF_SQ_CFDC_SUBTABLE_OS:
3099 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3100 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3101 case FSF_SQ_CFDC_SUBTABLE_LUN:
3102 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3103 "remote port with WWPN 0x%Lx "
3104 "connected to the adapter %s "
3105 "is denied (%s rule %d)\n",
3106 unit->fcp_lun,
3107 unit->port->wwpn,
3108 zfcp_get_busid_by_unit(unit),
3109 zfcp_act_subtable_type[subtable],
3110 rule);
3111 break;
3112 }
3113 }
3114 ZFCP_LOG_DEBUG("status qualifier:\n");
3115 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3116 (char *) &header->fsf_status_qual,
3117 sizeof (union fsf_status_qual));
3118 debug_text_event(adapter->erp_dbf, 2,
3119 "fsf_s_l_sh_vio");
3120 zfcp_erp_unit_access_denied(unit);
3121 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3122 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3123 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3124 break;
3125
3126 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3127 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3128 "There is no handle (temporary port identifier) "
3129 "available for unit 0x%016Lx on port 0x%016Lx "
3130 "on adapter %s\n",
3131 unit->fcp_lun,
3132 unit->port->wwpn,
3133 zfcp_get_busid_by_unit(unit));
3134 debug_text_event(adapter->erp_dbf, 1,
3135 "fsf_s_max_units");
3136 zfcp_erp_unit_failed(unit);
3137 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3138 break;
3139
3140 case FSF_ADAPTER_STATUS_AVAILABLE:
3141 switch (header->fsf_status_qual.word[0]) {
3142 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3143 /* Re-establish link to port */
3144 debug_text_event(adapter->erp_dbf, 1,
3145 "fsf_sq_ltest");
3146 zfcp_test_link(unit->port);
3147 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3148 break;
3149 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3150 /* ERP strategy will escalate */
3151 debug_text_event(adapter->erp_dbf, 1,
3152 "fsf_sq_ulp");
3153 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3154 break;
3155 default:
3156 ZFCP_LOG_NORMAL
3157 ("bug: Wrong status qualifier 0x%x arrived.\n",
3158 header->fsf_status_qual.word[0]);
3159 debug_text_event(adapter->erp_dbf, 0,
3160 "fsf_sq_inval:");
3161 debug_exception(adapter->erp_dbf, 0,
3162 &header->fsf_status_qual.word[0],
3163 sizeof (u32));
3164 }
3165 break;
3166
3167 case FSF_INVALID_COMMAND_OPTION:
3168 ZFCP_LOG_NORMAL(
3169 "Invalid option 0x%x has been specified "
3170 "in QTCB bottom sent to the adapter %s\n",
3171 bottom->option,
3172 zfcp_get_busid_by_adapter(adapter));
3173 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3174 retval = -EINVAL;
3175 break;
3176
3177 case FSF_GOOD:
3178 /* save LUN handle assigned by FSF */
3179 unit->handle = header->lun_handle;
3180 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3181 "adapter %s opened, port handle 0x%x\n",
3182 unit->fcp_lun,
3183 unit->port->wwpn,
3184 zfcp_get_busid_by_unit(unit),
3185 unit->handle);
3186 /* mark unit as open */
3187 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3188
3189 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3190 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3191 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3192 exclusive = (bottom->lun_access_info &
3193 FSF_UNIT_ACCESS_EXCLUSIVE);
3194 readwrite = (bottom->lun_access_info &
3195 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3196
3197 if (!exclusive)
3198 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3199 &unit->status);
3200
3201 if (!readwrite) {
3202 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3203 &unit->status);
3204 ZFCP_LOG_NORMAL("read-only access for unit "
3205 "(adapter %s, wwpn=0x%016Lx, "
3206 "fcp_lun=0x%016Lx)\n",
3207 zfcp_get_busid_by_unit(unit),
3208 unit->port->wwpn,
3209 unit->fcp_lun);
3210 }
3211
3212 if (exclusive && !readwrite) {
3213 ZFCP_LOG_NORMAL("exclusive access of read-only "
3214 "unit not supported\n");
3215 zfcp_erp_unit_failed(unit);
3216 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3217 zfcp_erp_unit_shutdown(unit, 0);
3218 } else if (!exclusive && readwrite) {
3219 ZFCP_LOG_NORMAL("shared access of read-write "
3220 "unit not supported\n");
3221 zfcp_erp_unit_failed(unit);
3222 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3223 zfcp_erp_unit_shutdown(unit, 0);
3224 }
3225 }
3226
3227 retval = 0;
3228 break;
3229
3230 default:
3231 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3232 "(debug info 0x%x)\n",
3233 header->fsf_status);
3234 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3235 debug_exception(adapter->erp_dbf, 0,
3236 &header->fsf_status, sizeof (u32));
3237 break;
3238 }
3239
3240 skip_fsfstatus:
3241 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3242 return retval;
3243 }
3244
3245 /*
3246 * function: zfcp_fsf_close_unit
3247 *
3248 * purpose:
3249 *
3250 * returns: address of fsf_req - request successfully initiated
3251 * NULL -
3252 *
3253 * assumptions: This routine does not check whether the associated
3254 * remote port/lun has already been opened. This should be
3255 * done by calling routines. Otherwise some status
3256 * may be presented by FSF
3257 */
3258 int
3259 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3260 {
3261 volatile struct qdio_buffer_element *sbale;
3262 unsigned long lock_flags;
3263 int retval = 0;
3264
3265 /* setup new FSF request */
3266 retval = zfcp_fsf_req_create(erp_action->adapter,
3267 FSF_QTCB_CLOSE_LUN,
3268 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3269 erp_action->adapter->pool.fsf_req_erp,
3270 &lock_flags, &(erp_action->fsf_req));
3271 if (retval < 0) {
3272 ZFCP_LOG_INFO("error: Could not create close unit request for "
3273 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3274 erp_action->unit->fcp_lun,
3275 erp_action->port->wwpn,
3276 zfcp_get_busid_by_adapter(erp_action->adapter));
3277 goto out;
3278 }
3279
3280 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3281 erp_action->fsf_req->sbal_curr, 0);
3282 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3283 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3284
3285 erp_action->fsf_req->qtcb->header.port_handle =
3286 erp_action->port->handle;
3287 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3288 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3289 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
3290 erp_action->fsf_req->erp_action = erp_action;
3291
3292 /* start QDIO request for this FSF request */
3293 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3294 if (retval) {
3295 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3296 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3297 erp_action->unit->fcp_lun,
3298 erp_action->port->wwpn,
3299 zfcp_get_busid_by_adapter(erp_action->adapter));
3300 zfcp_fsf_req_free(erp_action->fsf_req);
3301 erp_action->fsf_req = NULL;
3302 goto out;
3303 }
3304
3305 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3306 "port 0x%016Lx, unit 0x%016Lx)\n",
3307 zfcp_get_busid_by_adapter(erp_action->adapter),
3308 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3309 out:
3310 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3311 lock_flags);
3312 return retval;
3313 }
3314
3315 /*
3316 * function: zfcp_fsf_close_unit_handler
3317 *
3318 * purpose: is called for finished Close LUN FSF command
3319 *
3320 * returns:
3321 */
3322 static int
3323 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3324 {
3325 int retval = -EINVAL;
3326 struct zfcp_unit *unit;
3327
3328 unit = (struct zfcp_unit *) fsf_req->data;
3329
3330 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3331 /* don't change unit status in our bookkeeping */
3332 goto skip_fsfstatus;
3333 }
3334
3335 /* evaluate FSF status in QTCB */
3336 switch (fsf_req->qtcb->header.fsf_status) {
3337
3338 case FSF_PORT_HANDLE_NOT_VALID:
3339 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3340 "0x%016Lx on adapter %s invalid. This may "
3341 "happen in rare circumstances\n",
3342 unit->port->handle,
3343 unit->port->wwpn,
3344 zfcp_get_busid_by_unit(unit));
3345 ZFCP_LOG_DEBUG("status qualifier:\n");
3346 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3347 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3348 sizeof (union fsf_status_qual));
3349 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3350 "fsf_s_phand_nv");
3351 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3352 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3353 break;
3354
3355 case FSF_LUN_HANDLE_NOT_VALID:
3356 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3357 "0x%016Lx on port 0x%016Lx on adapter %s is "
3358 "invalid. This may happen occasionally.\n",
3359 unit->handle,
3360 unit->fcp_lun,
3361 unit->port->wwpn,
3362 zfcp_get_busid_by_unit(unit));
3363 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3364 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3365 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3366 sizeof (union fsf_status_qual));
3367 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3368 "fsf_s_lhand_nv");
3369 zfcp_erp_port_reopen(unit->port, 0);
3370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3371 break;
3372
3373 case FSF_PORT_BOXED:
3374 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3375 "needs to be reopened\n",
3376 unit->port->wwpn,
3377 zfcp_get_busid_by_unit(unit));
3378 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3379 zfcp_erp_port_boxed(unit->port);
3380 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3381 ZFCP_STATUS_FSFREQ_RETRY;
3382 break;
3383
3384 case FSF_ADAPTER_STATUS_AVAILABLE:
3385 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3386 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3387 /* re-establish link to port */
3388 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3389 "fsf_sq_ltest");
3390 zfcp_test_link(unit->port);
3391 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3392 break;
3393 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3394 /* ERP strategy will escalate */
3395 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3396 "fsf_sq_ulp");
3397 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3398 break;
3399 default:
3400 ZFCP_LOG_NORMAL
3401 ("bug: Wrong status qualifier 0x%x arrived.\n",
3402 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3403 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3404 "fsf_sq_inval:");
3405 debug_exception(
3406 fsf_req->adapter->erp_dbf, 0,
3407 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3408 sizeof (u32));
3409 break;
3410 }
3411 break;
3412
3413 case FSF_GOOD:
3414 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3415 "closed, port handle 0x%x\n",
3416 unit->fcp_lun,
3417 unit->port->wwpn,
3418 zfcp_get_busid_by_unit(unit),
3419 unit->handle);
3420 /* mark unit as closed */
3421 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3422 retval = 0;
3423 break;
3424
3425 default:
3426 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3427 "(debug info 0x%x)\n",
3428 fsf_req->qtcb->header.fsf_status);
3429 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3430 debug_exception(fsf_req->adapter->erp_dbf, 0,
3431 &fsf_req->qtcb->header.fsf_status,
3432 sizeof (u32));
3433 break;
3434 }
3435
3436 skip_fsfstatus:
3437 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3438 return retval;
3439 }
3440
3441 /**
3442 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3443 * @adapter: adapter where scsi command is issued
3444 * @unit: unit where command is sent to
3445 * @scsi_cmnd: scsi command to be sent
3446 * @timer: timer to be started when request is initiated
3447 * @req_flags: flags for fsf_request
3448 */
3449 int
3450 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3451 struct zfcp_unit *unit,
3452 struct scsi_cmnd * scsi_cmnd,
3453 struct timer_list *timer, int req_flags)
3454 {
3455 struct zfcp_fsf_req *fsf_req = NULL;
3456 struct fcp_cmnd_iu *fcp_cmnd_iu;
3457 unsigned int sbtype;
3458 unsigned long lock_flags;
3459 int real_bytes = 0;
3460 int retval = 0;
3461 int mask;
3462
3463 /* setup new FSF request */
3464 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3465 adapter->pool.fsf_req_scsi,
3466 &lock_flags, &fsf_req);
3467 if (unlikely(retval < 0)) {
3468 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3469 "for unit 0x%016Lx on port 0x%016Lx on "
3470 "adapter %s\n",
3471 unit->fcp_lun,
3472 unit->port->wwpn,
3473 zfcp_get_busid_by_adapter(adapter));
3474 goto failed_req_create;
3475 }
3476
3477 zfcp_unit_get(unit);
3478 fsf_req->unit = unit;
3479
3480 /* associate FSF request with SCSI request (for look up on abort) */
3481 scsi_cmnd->host_scribble = (char *) fsf_req;
3482
3483 /* associate SCSI command with FSF request */
3484 fsf_req->data = (unsigned long) scsi_cmnd;
3485
3486 /* set handles of unit and its parent port in QTCB */
3487 fsf_req->qtcb->header.lun_handle = unit->handle;
3488 fsf_req->qtcb->header.port_handle = unit->port->handle;
3489
3490 /* FSF does not define the structure of the FCP_CMND IU */
3491 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3492 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3493
3494 /*
3495 * set depending on data direction:
3496 * data direction bits in SBALE (SB Type)
3497 * data direction bits in QTCB
3498 * data direction bits in FCP_CMND IU
3499 */
3500 switch (scsi_cmnd->sc_data_direction) {
3501 case DMA_NONE:
3502 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3503 /*
3504 * FIXME(qdio):
3505 * what is the correct type for commands
3506 * without 'real' data buffers?
3507 */
3508 sbtype = SBAL_FLAGS0_TYPE_READ;
3509 break;
3510 case DMA_FROM_DEVICE:
3511 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3512 sbtype = SBAL_FLAGS0_TYPE_READ;
3513 fcp_cmnd_iu->rddata = 1;
3514 break;
3515 case DMA_TO_DEVICE:
3516 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3517 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3518 fcp_cmnd_iu->wddata = 1;
3519 break;
3520 case DMA_BIDIRECTIONAL:
3521 default:
3522 /*
3523 * dummy, catch this condition earlier
3524 * in zfcp_scsi_queuecommand
3525 */
3526 goto failed_scsi_cmnd;
3527 }
3528
3529 /* set FC service class in QTCB (3 per default) */
3530 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3531
3532 /* set FCP_LUN in FCP_CMND IU in QTCB */
3533 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3534
3535 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3536
3537 /* set task attributes in FCP_CMND IU in QTCB */
3538 if (likely((scsi_cmnd->device->simple_tags) ||
3539 (atomic_test_mask(mask, &unit->status))))
3540 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3541 else
3542 fcp_cmnd_iu->task_attribute = UNTAGGED;
3543
3544 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3545 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3546 fcp_cmnd_iu->add_fcp_cdb_length
3547 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3548 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3549 "additional FCP_CDB length is 0x%x "
3550 "(shifted right 2 bits)\n",
3551 scsi_cmnd->cmd_len,
3552 fcp_cmnd_iu->add_fcp_cdb_length);
3553 }
3554 /*
3555 * copy SCSI CDB (including additional length, if any) to
3556 * FCP_CDB in FCP_CMND IU in QTCB
3557 */
3558 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3559
3560 /* FCP CMND IU length in QTCB */
3561 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3562 sizeof (struct fcp_cmnd_iu) +
3563 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3564
3565 /* generate SBALEs from data buffer */
3566 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3567 if (unlikely(real_bytes < 0)) {
3568 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3569 ZFCP_LOG_DEBUG(
3570 "Data did not fit into available buffer(s), "
3571 "waiting for more...\n");
3572 retval = -EIO;
3573 } else {
3574 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3575 "required. Shutting down unit "
3576 "(adapter %s, port 0x%016Lx, "
3577 "unit 0x%016Lx)\n",
3578 zfcp_get_busid_by_unit(unit),
3579 unit->port->wwpn,
3580 unit->fcp_lun);
3581 zfcp_erp_unit_shutdown(unit, 0);
3582 retval = -EINVAL;
3583 }
3584 goto no_fit;
3585 }
3586
3587 /* set length of FCP data length in FCP_CMND IU in QTCB */
3588 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3589
3590 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3591 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3592 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3593
3594 /*
3595 * start QDIO request for this FSF request
3596 * covered by an SBALE)
3597 */
3598 retval = zfcp_fsf_req_send(fsf_req, timer);
3599 if (unlikely(retval < 0)) {
3600 ZFCP_LOG_INFO("error: Could not send FCP command request "
3601 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3602 zfcp_get_busid_by_adapter(adapter),
3603 unit->port->wwpn,
3604 unit->fcp_lun);
3605 goto send_failed;
3606 }
3607
3608 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3609 "port 0x%016Lx, unit 0x%016Lx)\n",
3610 zfcp_get_busid_by_adapter(adapter),
3611 unit->port->wwpn,
3612 unit->fcp_lun);
3613 goto success;
3614
3615 send_failed:
3616 no_fit:
3617 failed_scsi_cmnd:
3618 zfcp_unit_put(unit);
3619 zfcp_fsf_req_free(fsf_req);
3620 fsf_req = NULL;
3621 scsi_cmnd->host_scribble = NULL;
3622 success:
3623 failed_req_create:
3624 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3625 return retval;
3626 }
3627
3628 /*
3629 * function: zfcp_fsf_send_fcp_command_task_management
3630 *
3631 * purpose:
3632 *
3633 * returns:
3634 *
3635 * FIXME(design): should be watched by a timeout!!!
3636 * FIXME(design) shouldn't this be modified to return an int
3637 * also...don't know how though
3638 *
3639 */
3640 struct zfcp_fsf_req *
3641 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3642 struct zfcp_unit *unit,
3643 u8 tm_flags, int req_flags)
3644 {
3645 struct zfcp_fsf_req *fsf_req = NULL;
3646 int retval = 0;
3647 struct fcp_cmnd_iu *fcp_cmnd_iu;
3648 unsigned long lock_flags;
3649 volatile struct qdio_buffer_element *sbale;
3650
3651 /* setup new FSF request */
3652 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3653 adapter->pool.fsf_req_scsi,
3654 &lock_flags, &fsf_req);
3655 if (retval < 0) {
3656 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3657 "management) request for adapter %s, port "
3658 " 0x%016Lx, unit 0x%016Lx.\n",
3659 zfcp_get_busid_by_adapter(adapter),
3660 unit->port->wwpn, unit->fcp_lun);
3661 goto out;
3662 }
3663
3664 /*
3665 * Used to decide on proper handler in the return path,
3666 * could be either zfcp_fsf_send_fcp_command_task_handler or
3667 * zfcp_fsf_send_fcp_command_task_management_handler */
3668
3669 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3670
3671 /*
3672 * hold a pointer to the unit being target of this
3673 * task management request
3674 */
3675 fsf_req->data = (unsigned long) unit;
3676
3677 /* set FSF related fields in QTCB */
3678 fsf_req->qtcb->header.lun_handle = unit->handle;
3679 fsf_req->qtcb->header.port_handle = unit->port->handle;
3680 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3681 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3682 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3683 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3684
3685 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3686 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3687 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3688
3689 /* set FCP related fields in FCP_CMND IU in QTCB */
3690 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3691 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3692 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3693 fcp_cmnd_iu->task_management_flags = tm_flags;
3694
3695 /* start QDIO request for this FSF request */
3696 zfcp_fsf_start_scsi_er_timer(adapter);
3697 retval = zfcp_fsf_req_send(fsf_req, NULL);
3698 if (retval) {
3699 del_timer(&adapter->scsi_er_timer);
3700 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3701 "management) on adapter %s, port 0x%016Lx for "
3702 "unit LUN 0x%016Lx\n",
3703 zfcp_get_busid_by_adapter(adapter),
3704 unit->port->wwpn,
3705 unit->fcp_lun);
3706 zfcp_fsf_req_free(fsf_req);
3707 fsf_req = NULL;
3708 goto out;
3709 }
3710
3711 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3712 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3713 "tm_flags=0x%x)\n",
3714 zfcp_get_busid_by_adapter(adapter),
3715 unit->port->wwpn,
3716 unit->fcp_lun,
3717 tm_flags);
3718 out:
3719 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3720 return fsf_req;
3721 }
3722
3723 /*
3724 * function: zfcp_fsf_send_fcp_command_handler
3725 *
3726 * purpose: is called for finished Send FCP Command
3727 *
3728 * returns:
3729 */
3730 static int
3731 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3732 {
3733 int retval = -EINVAL;
3734 struct zfcp_unit *unit;
3735 struct fsf_qtcb_header *header;
3736 u16 subtable, rule, counter;
3737
3738 header = &fsf_req->qtcb->header;
3739
3740 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3741 unit = (struct zfcp_unit *) fsf_req->data;
3742 else
3743 unit = fsf_req->unit;
3744
3745 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3746 /* go directly to calls of special handlers */
3747 goto skip_fsfstatus;
3748 }
3749
3750 /* evaluate FSF status in QTCB */
3751 switch (header->fsf_status) {
3752
3753 case FSF_PORT_HANDLE_NOT_VALID:
3754 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3755 "0x%016Lx on adapter %s invalid\n",
3756 unit->port->handle,
3757 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3758 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3759 (char *) &header->fsf_status_qual,
3760 sizeof (union fsf_status_qual));
3761 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3762 "fsf_s_phand_nv");
3763 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3764 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3765 break;
3766
3767 case FSF_LUN_HANDLE_NOT_VALID:
3768 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3769 "0x%016Lx on port 0x%016Lx on adapter %s is "
3770 "invalid. This may happen occasionally.\n",
3771 unit->handle,
3772 unit->fcp_lun,
3773 unit->port->wwpn,
3774 zfcp_get_busid_by_unit(unit));
3775 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3776 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3777 (char *) &header->fsf_status_qual,
3778 sizeof (union fsf_status_qual));
3779 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3780 "fsf_s_uhand_nv");
3781 zfcp_erp_port_reopen(unit->port, 0);
3782 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3783 break;
3784
3785 case FSF_HANDLE_MISMATCH:
3786 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3787 "unexpectedly. (adapter %s, port 0x%016Lx, "
3788 "unit 0x%016Lx)\n",
3789 unit->port->handle,
3790 zfcp_get_busid_by_unit(unit),
3791 unit->port->wwpn,
3792 unit->fcp_lun);
3793 ZFCP_LOG_NORMAL("status qualifier:\n");
3794 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3795 (char *) &header->fsf_status_qual,
3796 sizeof (union fsf_status_qual));
3797 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3798 "fsf_s_hand_mis");
3799 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3800 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3801 break;
3802
3803 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3804 if (fsf_req->adapter->fc_service_class <= 3) {
3805 ZFCP_LOG_NORMAL("error: The adapter %s does "
3806 "not support fibrechannel class %d.\n",
3807 zfcp_get_busid_by_unit(unit),
3808 fsf_req->adapter->fc_service_class);
3809 } else {
3810 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3811 "adapter %s is invalid. "
3812 "(debug info %d)\n",
3813 zfcp_get_busid_by_unit(unit),
3814 fsf_req->adapter->fc_service_class);
3815 }
3816 /* stop operation for this adapter */
3817 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3818 "fsf_s_class_nsup");
3819 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3820 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3821 break;
3822
3823 case FSF_FCPLUN_NOT_VALID:
3824 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3825 "adapter %s does not have correct unit "
3826 "handle 0x%x\n",
3827 unit->fcp_lun,
3828 unit->port->wwpn,
3829 zfcp_get_busid_by_unit(unit),
3830 unit->handle);
3831 ZFCP_LOG_DEBUG("status qualifier:\n");
3832 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3833 (char *) &header->fsf_status_qual,
3834 sizeof (union fsf_status_qual));
3835 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3836 "fsf_s_fcp_lun_nv");
3837 zfcp_erp_port_reopen(unit->port, 0);
3838 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3839 break;
3840
3841 case FSF_ACCESS_DENIED:
3842 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3843 "unit 0x%016Lx on port 0x%016Lx on "
3844 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3845 zfcp_get_busid_by_unit(unit));
3846 for (counter = 0; counter < 2; counter++) {
3847 subtable = header->fsf_status_qual.halfword[counter * 2];
3848 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3849 switch (subtable) {
3850 case FSF_SQ_CFDC_SUBTABLE_OS:
3851 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3852 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3853 case FSF_SQ_CFDC_SUBTABLE_LUN:
3854 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3855 zfcp_act_subtable_type[subtable], rule);
3856 break;
3857 }
3858 }
3859 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3860 zfcp_erp_unit_access_denied(unit);
3861 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3862 break;
3863
3864 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3865 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3866 "0x%016Lx on port 0x%016Lx on adapter %s "
3867 "(debug info %d)\n",
3868 unit->fcp_lun,
3869 unit->port->wwpn,
3870 zfcp_get_busid_by_unit(unit),
3871 fsf_req->qtcb->bottom.io.data_direction);
3872 /* stop operation for this adapter */
3873 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3874 "fsf_s_dir_ind_nv");
3875 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3876 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3877 break;
3878
3879 case FSF_CMND_LENGTH_NOT_VALID:
3880 ZFCP_LOG_NORMAL
3881 ("bug: An invalid control-data-block length field "
3882 "was found in a command for unit 0x%016Lx on port "
3883 "0x%016Lx on adapter %s " "(debug info %d)\n",
3884 unit->fcp_lun, unit->port->wwpn,
3885 zfcp_get_busid_by_unit(unit),
3886 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3887 /* stop operation for this adapter */
3888 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3889 "fsf_s_cmd_len_nv");
3890 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3891 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3892 break;
3893
3894 case FSF_PORT_BOXED:
3895 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3896 "needs to be reopened\n",
3897 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3898 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3899 zfcp_erp_port_boxed(unit->port);
3900 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3901 ZFCP_STATUS_FSFREQ_RETRY;
3902 break;
3903
3904 case FSF_LUN_BOXED:
3905 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3906 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3907 zfcp_get_busid_by_unit(unit),
3908 unit->port->wwpn, unit->fcp_lun);
3909 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
3910 zfcp_erp_unit_boxed(unit);
3911 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3912 | ZFCP_STATUS_FSFREQ_RETRY;
3913 break;
3914
3915 case FSF_ADAPTER_STATUS_AVAILABLE:
3916 switch (header->fsf_status_qual.word[0]) {
3917 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3918 /* re-establish link to port */
3919 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3920 "fsf_sq_ltest");
3921 zfcp_test_link(unit->port);
3922 break;
3923 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3924 /* FIXME(hw) need proper specs for proper action */
3925 /* let scsi stack deal with retries and escalation */
3926 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3927 "fsf_sq_ulp");
3928 break;
3929 default:
3930 ZFCP_LOG_NORMAL
3931 ("Unknown status qualifier 0x%x arrived.\n",
3932 header->fsf_status_qual.word[0]);
3933 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3934 "fsf_sq_inval:");
3935 debug_exception(fsf_req->adapter->erp_dbf, 0,
3936 &header->fsf_status_qual.word[0],
3937 sizeof(u32));
3938 break;
3939 }
3940 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3941 break;
3942
3943 case FSF_GOOD:
3944 break;
3945
3946 case FSF_FCP_RSP_AVAILABLE:
3947 break;
3948
3949 default:
3950 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3951 debug_exception(fsf_req->adapter->erp_dbf, 0,
3952 &header->fsf_status, sizeof(u32));
3953 break;
3954 }
3955
3956 skip_fsfstatus:
3957 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3958 retval =
3959 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3960 } else {
3961 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
3962 fsf_req->unit = NULL;
3963 zfcp_unit_put(unit);
3964 }
3965 return retval;
3966 }
3967
3968 /*
3969 * function: zfcp_fsf_send_fcp_command_task_handler
3970 *
3971 * purpose: evaluates FCP_RSP IU
3972 *
3973 * returns:
3974 */
3975 static int
3976 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3977 {
3978 int retval = 0;
3979 struct scsi_cmnd *scpnt;
3980 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3981 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3982 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3983 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3984 u32 sns_len;
3985 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3986 unsigned long flags;
3987 struct zfcp_unit *unit = fsf_req->unit;
3988
3989 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
3990 scpnt = (struct scsi_cmnd *) fsf_req->data;
3991 if (unlikely(!scpnt)) {
3992 ZFCP_LOG_DEBUG
3993 ("Command with fsf_req %p is not associated to "
3994 "a scsi command anymore. Aborted?\n", fsf_req);
3995 goto out;
3996 }
3997 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3998 /* FIXME: (design) mid-layer should handle DID_ABORT like
3999 * DID_SOFT_ERROR by retrying the request for devices
4000 * that allow retries.
4001 */
4002 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4003 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4004 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4005 goto skip_fsfstatus;
4006 }
4007
4008 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4009 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4010 set_host_byte(&scpnt->result, DID_ERROR);
4011 goto skip_fsfstatus;
4012 }
4013
4014 /* set message byte of result in SCSI command */
4015 scpnt->result |= COMMAND_COMPLETE << 8;
4016
4017 /*
4018 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4019 * of result in SCSI command
4020 */
4021 scpnt->result |= fcp_rsp_iu->scsi_status;
4022 if (unlikely(fcp_rsp_iu->scsi_status)) {
4023 /* DEBUG */
4024 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4025 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4026 scpnt->cmnd, scpnt->cmd_len);
4027 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4028 fcp_rsp_iu->scsi_status);
4029 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4030 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4031 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4032 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4033 fcp_rsp_iu->fcp_sns_len);
4034 }
4035
4036 /* check FCP_RSP_INFO */
4037 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4038 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4039 switch (fcp_rsp_info[3]) {
4040 case RSP_CODE_GOOD:
4041 /* ok, continue */
4042 ZFCP_LOG_TRACE("no failure or Task Management "
4043 "Function complete\n");
4044 set_host_byte(&scpnt->result, DID_OK);
4045 break;
4046 case RSP_CODE_LENGTH_MISMATCH:
4047 /* hardware bug */
4048 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4049 "that the fibrechannel protocol data "
4050 "length differs from the burst length. "
4051 "The problem occured on unit 0x%016Lx "
4052 "on port 0x%016Lx on adapter %s",
4053 unit->fcp_lun,
4054 unit->port->wwpn,
4055 zfcp_get_busid_by_unit(unit));
4056 /* dump SCSI CDB as prepared by zfcp */
4057 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4058 (char *) &fsf_req->qtcb->
4059 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4060 set_host_byte(&scpnt->result, DID_ERROR);
4061 goto skip_fsfstatus;
4062 case RSP_CODE_FIELD_INVALID:
4063 /* driver or hardware bug */
4064 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4065 "that the fibrechannel protocol data "
4066 "fields were incorrectly set up. "
4067 "The problem occured on the unit "
4068 "0x%016Lx on port 0x%016Lx on "
4069 "adapter %s",
4070 unit->fcp_lun,
4071 unit->port->wwpn,
4072 zfcp_get_busid_by_unit(unit));
4073 /* dump SCSI CDB as prepared by zfcp */
4074 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4075 (char *) &fsf_req->qtcb->
4076 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4077 set_host_byte(&scpnt->result, DID_ERROR);
4078 goto skip_fsfstatus;
4079 case RSP_CODE_RO_MISMATCH:
4080 /* hardware bug */
4081 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4082 "that conflicting values for the "
4083 "fibrechannel payload offset from the "
4084 "header were found. "
4085 "The problem occured on unit 0x%016Lx "
4086 "on port 0x%016Lx on adapter %s.\n",
4087 unit->fcp_lun,
4088 unit->port->wwpn,
4089 zfcp_get_busid_by_unit(unit));
4090 /* dump SCSI CDB as prepared by zfcp */
4091 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4092 (char *) &fsf_req->qtcb->
4093 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4094 set_host_byte(&scpnt->result, DID_ERROR);
4095 goto skip_fsfstatus;
4096 default:
4097 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4098 "code was detected for a command. "
4099 "The problem occured on the unit "
4100 "0x%016Lx on port 0x%016Lx on "
4101 "adapter %s (debug info 0x%x)\n",
4102 unit->fcp_lun,
4103 unit->port->wwpn,
4104 zfcp_get_busid_by_unit(unit),
4105 fcp_rsp_info[3]);
4106 /* dump SCSI CDB as prepared by zfcp */
4107 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4108 (char *) &fsf_req->qtcb->
4109 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4110 set_host_byte(&scpnt->result, DID_ERROR);
4111 goto skip_fsfstatus;
4112 }
4113 }
4114
4115 /* check for sense data */
4116 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4117 sns_len = FSF_FCP_RSP_SIZE -
4118 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4119 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4120 sns_len);
4121 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4122 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4123 SCSI_SENSE_BUFFERSIZE);
4124 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4125 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4126 scpnt->result);
4127 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4128 (void *) &scpnt->cmnd, scpnt->cmd_len);
4129
4130 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4131 fcp_rsp_iu->fcp_sns_len);
4132 memcpy(&scpnt->sense_buffer,
4133 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4134 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4135 (void *) &scpnt->sense_buffer, sns_len);
4136 }
4137
4138 /* check for overrun */
4139 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4140 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4141 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4142 "The response data length is "
4143 "%d, the original length was %d.\n",
4144 unit->fcp_lun,
4145 unit->port->wwpn,
4146 zfcp_get_busid_by_unit(unit),
4147 fcp_rsp_iu->fcp_resid,
4148 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4149 }
4150
4151 /* check for underrun */
4152 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4153 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4154 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4155 "The response data length is "
4156 "%d, the original length was %d.\n",
4157 unit->fcp_lun,
4158 unit->port->wwpn,
4159 zfcp_get_busid_by_unit(unit),
4160 fcp_rsp_iu->fcp_resid,
4161 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4162
4163 scpnt->resid = fcp_rsp_iu->fcp_resid;
4164 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4165 set_host_byte(&scpnt->result, DID_ERROR);
4166 }
4167
4168 skip_fsfstatus:
4169 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4170
4171 if (scpnt->result != 0)
4172 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt);
4173 else if (scpnt->retries > 0)
4174 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt);
4175 else
4176 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt);
4177
4178 /* cleanup pointer (need this especially for abort) */
4179 scpnt->host_scribble = NULL;
4180
4181 /* always call back */
4182 (scpnt->scsi_done) (scpnt);
4183
4184 /*
4185 * We must hold this lock until scsi_done has been called.
4186 * Otherwise we may call scsi_done after abort regarding this
4187 * command has completed.
4188 * Note: scsi_done must not block!
4189 */
4190 out:
4191 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4192 return retval;
4193 }
4194
4195 /*
4196 * function: zfcp_fsf_send_fcp_command_task_management_handler
4197 *
4198 * purpose: evaluates FCP_RSP IU
4199 *
4200 * returns:
4201 */
4202 static int
4203 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4204 {
4205 int retval = 0;
4206 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4207 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4208 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4209 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
4210
4211 del_timer(&fsf_req->adapter->scsi_er_timer);
4212 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4213 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4214 goto skip_fsfstatus;
4215 }
4216
4217 /* check FCP_RSP_INFO */
4218 switch (fcp_rsp_info[3]) {
4219 case RSP_CODE_GOOD:
4220 /* ok, continue */
4221 ZFCP_LOG_DEBUG("no failure or Task Management "
4222 "Function complete\n");
4223 break;
4224 case RSP_CODE_TASKMAN_UNSUPP:
4225 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4226 "is not supported on the target device "
4227 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4228 unit->fcp_lun,
4229 unit->port->wwpn,
4230 zfcp_get_busid_by_unit(unit));
4231 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4232 break;
4233 case RSP_CODE_TASKMAN_FAILED:
4234 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4235 "failed to complete successfully. "
4236 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4237 unit->fcp_lun,
4238 unit->port->wwpn,
4239 zfcp_get_busid_by_unit(unit));
4240 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4241 break;
4242 default:
4243 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4244 "code was detected for a command. "
4245 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4246 "(debug info 0x%x)\n",
4247 unit->fcp_lun,
4248 unit->port->wwpn,
4249 zfcp_get_busid_by_unit(unit),
4250 fcp_rsp_info[3]);
4251 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4252 }
4253
4254 skip_fsfstatus:
4255 return retval;
4256 }
4257
4258
4259 /*
4260 * function: zfcp_fsf_control_file
4261 *
4262 * purpose: Initiator of the control file upload/download FSF requests
4263 *
4264 * returns: 0 - FSF request is successfuly created and queued
4265 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4266 * -EINVAL - Invalid direction specified
4267 * -ENOMEM - Insufficient memory
4268 * -EPERM - Cannot create FSF request or place it in QDIO queue
4269 */
4270 int
4271 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4272 struct zfcp_fsf_req **fsf_req_ptr,
4273 u32 fsf_command,
4274 u32 option,
4275 struct zfcp_sg_list *sg_list)
4276 {
4277 struct zfcp_fsf_req *fsf_req;
4278 struct fsf_qtcb_bottom_support *bottom;
4279 volatile struct qdio_buffer_element *sbale;
4280 struct timer_list *timer;
4281 unsigned long lock_flags;
4282 int req_flags = 0;
4283 int direction;
4284 int retval = 0;
4285
4286 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
4287 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4288 zfcp_get_busid_by_adapter(adapter));
4289 retval = -EOPNOTSUPP;
4290 goto out;
4291 }
4292
4293 switch (fsf_command) {
4294
4295 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4296 direction = SBAL_FLAGS0_TYPE_WRITE;
4297 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4298 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4299 req_flags = ZFCP_WAIT_FOR_SBAL;
4300 break;
4301
4302 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4303 direction = SBAL_FLAGS0_TYPE_READ;
4304 break;
4305
4306 default:
4307 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4308 retval = -EINVAL;
4309 goto out;
4310 }
4311
4312 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4313 if (!timer) {
4314 retval = -ENOMEM;
4315 goto out;
4316 }
4317
4318 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4319 NULL, &lock_flags, &fsf_req);
4320 if (retval < 0) {
4321 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4322 "adapter %s\n",
4323 zfcp_get_busid_by_adapter(adapter));
4324 retval = -EPERM;
4325 goto unlock_queue_lock;
4326 }
4327
4328 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4329 sbale[0].flags |= direction;
4330
4331 bottom = &fsf_req->qtcb->bottom.support;
4332 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4333 bottom->option = option;
4334
4335 if (sg_list->count > 0) {
4336 int bytes;
4337
4338 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4339 sg_list->sg, sg_list->count,
4340 ZFCP_MAX_SBALS_PER_REQ);
4341 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4342 ZFCP_LOG_INFO(
4343 "error: Could not create sufficient number of "
4344 "SBALS for an FSF request to the adapter %s\n",
4345 zfcp_get_busid_by_adapter(adapter));
4346 retval = -ENOMEM;
4347 goto free_fsf_req;
4348 }
4349 } else
4350 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4351
4352 init_timer(timer);
4353 timer->function = zfcp_fsf_request_timeout_handler;
4354 timer->data = (unsigned long) adapter;
4355 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4356
4357 retval = zfcp_fsf_req_send(fsf_req, timer);
4358 if (retval < 0) {
4359 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4360 "(adapter %s)\n",
4361 zfcp_get_busid_by_adapter(adapter));
4362 retval = -EPERM;
4363 goto free_fsf_req;
4364 }
4365 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4366
4367 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4368 "adapter %s\n",
4369 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4370 "download" : "upload",
4371 zfcp_get_busid_by_adapter(adapter));
4372
4373 wait_event(fsf_req->completion_wq,
4374 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4375
4376 *fsf_req_ptr = fsf_req;
4377 del_timer_sync(timer);
4378 goto free_timer;
4379
4380 free_fsf_req:
4381 zfcp_fsf_req_free(fsf_req);
4382 unlock_queue_lock:
4383 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4384 free_timer:
4385 kfree(timer);
4386 out:
4387 return retval;
4388 }
4389
4390
4391 /*
4392 * function: zfcp_fsf_control_file_handler
4393 *
4394 * purpose: Handler of the control file upload/download FSF requests
4395 *
4396 * returns: 0 - FSF request successfuly processed
4397 * -EAGAIN - Operation has to be repeated because of a temporary problem
4398 * -EACCES - There is no permission to execute an operation
4399 * -EPERM - The control file is not in a right format
4400 * -EIO - There is a problem with the FCP adapter
4401 * -EINVAL - Invalid operation
4402 * -EFAULT - User space memory I/O operation fault
4403 */
4404 static int
4405 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4406 {
4407 struct zfcp_adapter *adapter = fsf_req->adapter;
4408 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4409 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4410 int retval = 0;
4411
4412 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4413 retval = -EINVAL;
4414 goto skip_fsfstatus;
4415 }
4416
4417 switch (header->fsf_status) {
4418
4419 case FSF_GOOD:
4420 ZFCP_LOG_NORMAL(
4421 "The FSF request has been successfully completed "
4422 "on the adapter %s\n",
4423 zfcp_get_busid_by_adapter(adapter));
4424 break;
4425
4426 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4427 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4428 switch (header->fsf_status_qual.word[0]) {
4429
4430 case FSF_SQ_CFDC_HARDENED_ON_SE:
4431 ZFCP_LOG_NORMAL(
4432 "CFDC on the adapter %s has being "
4433 "hardened on primary and secondary SE\n",
4434 zfcp_get_busid_by_adapter(adapter));
4435 break;
4436
4437 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4438 ZFCP_LOG_NORMAL(
4439 "CFDC of the adapter %s could not "
4440 "be saved on the SE\n",
4441 zfcp_get_busid_by_adapter(adapter));
4442 break;
4443
4444 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4445 ZFCP_LOG_NORMAL(
4446 "CFDC of the adapter %s could not "
4447 "be copied to the secondary SE\n",
4448 zfcp_get_busid_by_adapter(adapter));
4449 break;
4450
4451 default:
4452 ZFCP_LOG_NORMAL(
4453 "CFDC could not be hardened "
4454 "on the adapter %s\n",
4455 zfcp_get_busid_by_adapter(adapter));
4456 }
4457 }
4458 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4459 retval = -EAGAIN;
4460 break;
4461
4462 case FSF_AUTHORIZATION_FAILURE:
4463 ZFCP_LOG_NORMAL(
4464 "Adapter %s does not accept privileged commands\n",
4465 zfcp_get_busid_by_adapter(adapter));
4466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4467 retval = -EACCES;
4468 break;
4469
4470 case FSF_CFDC_ERROR_DETECTED:
4471 ZFCP_LOG_NORMAL(
4472 "Error at position %d in the CFDC, "
4473 "CFDC is discarded by the adapter %s\n",
4474 header->fsf_status_qual.word[0],
4475 zfcp_get_busid_by_adapter(adapter));
4476 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4477 retval = -EPERM;
4478 break;
4479
4480 case FSF_CONTROL_FILE_UPDATE_ERROR:
4481 ZFCP_LOG_NORMAL(
4482 "Adapter %s cannot harden the control file, "
4483 "file is discarded\n",
4484 zfcp_get_busid_by_adapter(adapter));
4485 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4486 retval = -EIO;
4487 break;
4488
4489 case FSF_CONTROL_FILE_TOO_LARGE:
4490 ZFCP_LOG_NORMAL(
4491 "Control file is too large, file is discarded "
4492 "by the adapter %s\n",
4493 zfcp_get_busid_by_adapter(adapter));
4494 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4495 retval = -EIO;
4496 break;
4497
4498 case FSF_ACCESS_CONFLICT_DETECTED:
4499 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4500 ZFCP_LOG_NORMAL(
4501 "CFDC has been discarded by the adapter %s, "
4502 "because activation would impact "
4503 "%d active connection(s)\n",
4504 zfcp_get_busid_by_adapter(adapter),
4505 header->fsf_status_qual.word[0]);
4506 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4507 retval = -EIO;
4508 break;
4509
4510 case FSF_CONFLICTS_OVERRULED:
4511 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4512 ZFCP_LOG_NORMAL(
4513 "CFDC has been activated on the adapter %s, "
4514 "but activation has impacted "
4515 "%d active connection(s)\n",
4516 zfcp_get_busid_by_adapter(adapter),
4517 header->fsf_status_qual.word[0]);
4518 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4519 retval = -EIO;
4520 break;
4521
4522 case FSF_UNKNOWN_OP_SUBTYPE:
4523 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4524 "op_subtype=0x%x)\n",
4525 zfcp_get_busid_by_adapter(adapter),
4526 bottom->operation_subtype);
4527 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4528 retval = -EINVAL;
4529 break;
4530
4531 case FSF_INVALID_COMMAND_OPTION:
4532 ZFCP_LOG_NORMAL(
4533 "Invalid option 0x%x has been specified "
4534 "in QTCB bottom sent to the adapter %s\n",
4535 bottom->option,
4536 zfcp_get_busid_by_adapter(adapter));
4537 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4538 retval = -EINVAL;
4539 break;
4540
4541 default:
4542 ZFCP_LOG_NORMAL(
4543 "bug: An unknown/unexpected FSF status 0x%08x "
4544 "was presented on the adapter %s\n",
4545 header->fsf_status,
4546 zfcp_get_busid_by_adapter(adapter));
4547 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4548 debug_exception(fsf_req->adapter->erp_dbf, 0,
4549 &header->fsf_status_qual.word[0], sizeof(u32));
4550 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4551 retval = -EINVAL;
4552 break;
4553 }
4554
4555 skip_fsfstatus:
4556 return retval;
4557 }
4558
4559 static inline int
4560 zfcp_fsf_req_sbal_check(unsigned long *flags,
4561 struct zfcp_qdio_queue *queue, int needed)
4562 {
4563 write_lock_irqsave(&queue->queue_lock, *flags);
4564 if (likely(atomic_read(&queue->free_count) >= needed))
4565 return 1;
4566 write_unlock_irqrestore(&queue->queue_lock, *flags);
4567 return 0;
4568 }
4569
4570 /*
4571 * set qtcb pointer in fsf_req and initialize QTCB
4572 */
4573 static inline void
4574 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
4575 {
4576 if (likely(fsf_req->qtcb != NULL)) {
4577 fsf_req->qtcb->prefix.req_seq_no = fsf_req->adapter->fsf_req_seq_no;
4578 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4579 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4580 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_req->fsf_command];
4581 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4582 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4583 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
4584 }
4585 }
4586
4587 /**
4588 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4589 * @adapter: adapter for which request queue is examined
4590 * @req_flags: flags indicating whether to wait for needed SBAL or not
4591 * @lock_flags: lock_flags if queue_lock is taken
4592 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4593 * Locks: lock adapter->request_queue->queue_lock on success
4594 */
4595 static int
4596 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4597 unsigned long *lock_flags)
4598 {
4599 long ret;
4600 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4601
4602 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4603 ret = wait_event_interruptible_timeout(adapter->request_wq,
4604 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4605 ZFCP_SBAL_TIMEOUT);
4606 if (ret < 0)
4607 return ret;
4608 if (!ret)
4609 return -EIO;
4610 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4611 return -EIO;
4612
4613 return 0;
4614 }
4615
4616 /*
4617 * function: zfcp_fsf_req_create
4618 *
4619 * purpose: create an FSF request at the specified adapter and
4620 * setup common fields
4621 *
4622 * returns: -ENOMEM if there was insufficient memory for a request
4623 * -EIO if no qdio buffers could be allocate to the request
4624 * -EINVAL/-EPERM on bug conditions in req_dequeue
4625 * 0 in success
4626 *
4627 * note: The created request is returned by reference.
4628 *
4629 * locks: lock of concerned request queue must not be held,
4630 * but is held on completion (write, irqsave)
4631 */
4632 int
4633 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4634 mempool_t *pool, unsigned long *lock_flags,
4635 struct zfcp_fsf_req **fsf_req_p)
4636 {
4637 volatile struct qdio_buffer_element *sbale;
4638 struct zfcp_fsf_req *fsf_req = NULL;
4639 int ret = 0;
4640 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4641
4642 /* allocate new FSF request */
4643 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4644 if (unlikely(NULL == fsf_req)) {
4645 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4646 "the outbound (send) queue.\n");
4647 ret = -ENOMEM;
4648 goto failed_fsf_req;
4649 }
4650
4651 fsf_req->adapter = adapter;
4652 fsf_req->fsf_command = fsf_cmd;
4653
4654 zfcp_fsf_req_qtcb_init(fsf_req);
4655
4656 /* initialize waitqueue which may be used to wait on
4657 this request completion */
4658 init_waitqueue_head(&fsf_req->completion_wq);
4659
4660 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4661 if(ret < 0) {
4662 goto failed_sbals;
4663 }
4664
4665 /*
4666 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4667 * if it is not set (see also *_open_qdio and *_close_qdio).
4668 */
4669
4670 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4671 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4672 ret = -EIO;
4673 goto failed_sbals;
4674 }
4675
4676 if (fsf_req->qtcb) {
4677 fsf_req->seq_no = adapter->fsf_req_seq_no;
4678 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4679 }
4680 fsf_req->sbal_number = 1;
4681 fsf_req->sbal_first = req_queue->free_index;
4682 fsf_req->sbal_curr = req_queue->free_index;
4683 fsf_req->sbale_curr = 1;
4684
4685 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4686 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4687 }
4688
4689 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4690
4691 /* setup common SBALE fields */
4692 sbale[0].addr = fsf_req;
4693 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4694 if (likely(fsf_req->qtcb != NULL)) {
4695 sbale[1].addr = (void *) fsf_req->qtcb;
4696 sbale[1].length = sizeof(struct fsf_qtcb);
4697 }
4698
4699 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4700 fsf_req->sbal_number, fsf_req->sbal_first);
4701
4702 goto success;
4703
4704 failed_sbals:
4705 /* dequeue new FSF request previously enqueued */
4706 zfcp_fsf_req_free(fsf_req);
4707 fsf_req = NULL;
4708
4709 failed_fsf_req:
4710 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4711 success:
4712 *fsf_req_p = fsf_req;
4713 return ret;
4714 }
4715
4716 /*
4717 * function: zfcp_fsf_req_send
4718 *
4719 * purpose: start transfer of FSF request via QDIO
4720 *
4721 * returns: 0 - request transfer succesfully started
4722 * !0 - start of request transfer failed
4723 */
4724 static int
4725 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4726 {
4727 struct zfcp_adapter *adapter;
4728 struct zfcp_qdio_queue *req_queue;
4729 volatile struct qdio_buffer_element *sbale;
4730 int inc_seq_no;
4731 int new_distance_from_int;
4732 unsigned long flags;
4733 int retval = 0;
4734
4735 adapter = fsf_req->adapter;
4736 req_queue = &adapter->request_queue,
4737
4738
4739 /* FIXME(debug): remove it later */
4740 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4741 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4742 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4743 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4744 sbale[1].length);
4745
4746 /* put allocated FSF request at list tail */
4747 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4748 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
4749 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4750
4751 inc_seq_no = (fsf_req->qtcb != NULL);
4752
4753 /* figure out expiration time of timeout and start timeout */
4754 if (unlikely(timer)) {
4755 timer->expires += jiffies;
4756 add_timer(timer);
4757 }
4758
4759 ZFCP_LOG_TRACE("request queue of adapter %s: "
4760 "next free SBAL is %i, %i free SBALs\n",
4761 zfcp_get_busid_by_adapter(adapter),
4762 req_queue->free_index,
4763 atomic_read(&req_queue->free_count));
4764
4765 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4766 "index_in_queue=%i, count=%i, buffers=%p\n",
4767 zfcp_get_busid_by_adapter(adapter),
4768 QDIO_FLAG_SYNC_OUTPUT,
4769 0, fsf_req->sbal_first, fsf_req->sbal_number,
4770 &req_queue->buffer[fsf_req->sbal_first]);
4771
4772 /*
4773 * adjust the number of free SBALs in request queue as well as
4774 * position of first one
4775 */
4776 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4777 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4778 req_queue->free_index += fsf_req->sbal_number; /* increase */
4779 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4780 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4781
4782 fsf_req->issued = get_clock();
4783
4784 retval = do_QDIO(adapter->ccw_device,
4785 QDIO_FLAG_SYNC_OUTPUT,
4786 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4787
4788 if (unlikely(retval)) {
4789 /* Queues are down..... */
4790 retval = -EIO;
4791 /*
4792 * FIXME(potential race):
4793 * timer might be expired (absolutely unlikely)
4794 */
4795 if (timer)
4796 del_timer(timer);
4797 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4798 list_del(&fsf_req->list);
4799 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4800 /*
4801 * adjust the number of free SBALs in request queue as well as
4802 * position of first one
4803 */
4804 zfcp_qdio_zero_sbals(req_queue->buffer,
4805 fsf_req->sbal_first, fsf_req->sbal_number);
4806 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4807 req_queue->free_index -= fsf_req->sbal_number; /* increase */
4808 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4809 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4810 ZFCP_LOG_DEBUG
4811 ("error: do_QDIO failed. Buffers could not be enqueued "
4812 "to request queue.\n");
4813 } else {
4814 req_queue->distance_from_int = new_distance_from_int;
4815 /*
4816 * increase FSF sequence counter -
4817 * this must only be done for request successfully enqueued to
4818 * QDIO this rejected requests may be cleaned up by calling
4819 * routines resulting in missing sequence counter values
4820 * otherwise,
4821 */
4822
4823 /* Don't increase for unsolicited status */
4824 if (inc_seq_no)
4825 adapter->fsf_req_seq_no++;
4826
4827 /* count FSF requests pending */
4828 atomic_inc(&adapter->fsf_reqs_active);
4829 }
4830 return retval;
4831 }
4832
4833 #undef ZFCP_LOG_AREA
linux kernel for loongson