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[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
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 int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
63 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
64
65 /* association between FSF command and FSF QTCB type */
66 static u32 fsf_qtcb_type[] = {
67 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
68 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
69 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
70 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
75 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
76 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
77 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
78 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
79 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
80 };
81
82 static const char zfcp_act_subtable_type[5][8] = {
83 "unknown", "OS", "WWPN", "DID", "LUN"
84 };
85
86 /****************************************************************/
87 /*************** FSF related Functions *************************/
88 /****************************************************************/
89
90 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
91
92 /*
93 * function: zfcp_fsf_req_alloc
94 *
95 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
96 * unsolicited requests) via helper functions
97 * Does some initial fsf request set-up.
98 *
99 * returns: pointer to allocated fsf_req if successfull
100 * NULL otherwise
101 *
102 * locks: none
103 *
104 */
105 static struct zfcp_fsf_req *
106 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
107 {
108 size_t size;
109 void *ptr;
110 struct zfcp_fsf_req *fsf_req = NULL;
111
112 if (req_flags & ZFCP_REQ_NO_QTCB)
113 size = sizeof(struct zfcp_fsf_req);
114 else
115 size = sizeof(struct zfcp_fsf_req_pool_element);
116
117 if (likely(pool != NULL))
118 ptr = mempool_alloc(pool, GFP_ATOMIC);
119 else
120 ptr = kmalloc(size, GFP_ATOMIC);
121
122 if (unlikely(NULL == ptr))
123 goto out;
124
125 memset(ptr, 0, size);
126
127 if (req_flags & ZFCP_REQ_NO_QTCB) {
128 fsf_req = (struct zfcp_fsf_req *) ptr;
129 } else {
130 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
131 fsf_req->qtcb =
132 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
133 }
134
135 fsf_req->pool = pool;
136
137 out:
138 return fsf_req;
139 }
140
141 /*
142 * function: zfcp_fsf_req_free
143 *
144 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
145 * returns it into the pool via helper functions.
146 *
147 * returns: sod all
148 *
149 * locks: none
150 */
151 void
152 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
153 {
154 if (likely(fsf_req->pool != NULL))
155 mempool_free(fsf_req, fsf_req->pool);
156 else
157 kfree(fsf_req);
158 }
159
160 /*
161 * function:
162 *
163 * purpose:
164 *
165 * returns:
166 *
167 * note: qdio queues shall be down (no ongoing inbound processing)
168 */
169 int
170 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
171 {
172 struct zfcp_fsf_req *fsf_req, *tmp;
173 unsigned long flags;
174 LIST_HEAD(remove_queue);
175
176 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
177 list_splice_init(&adapter->fsf_req_list_head, &remove_queue);
178 atomic_set(&adapter->fsf_reqs_active, 0);
179 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
180
181 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
182 list_del(&fsf_req->list);
183 zfcp_fsf_req_dismiss(fsf_req);
184 }
185
186 return 0;
187 }
188
189 /*
190 * function:
191 *
192 * purpose:
193 *
194 * returns:
195 */
196 static void
197 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
198 {
199 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
200 zfcp_fsf_req_complete(fsf_req);
201 }
202
203 /*
204 * function: zfcp_fsf_req_complete
205 *
206 * purpose: Updates active counts and timers for openfcp-reqs
207 * May cleanup request after req_eval returns
208 *
209 * returns: 0 - success
210 * !0 - failure
211 *
212 * context:
213 */
214 int
215 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
216 {
217 int retval = 0;
218 int cleanup;
219
220 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
221 ZFCP_LOG_DEBUG("Status read response received\n");
222 /*
223 * Note: all cleanup handling is done in the callchain of
224 * the function call-chain below.
225 */
226 zfcp_fsf_status_read_handler(fsf_req);
227 goto out;
228 } else
229 zfcp_fsf_protstatus_eval(fsf_req);
230
231 /*
232 * fsf_req may be deleted due to waking up functions, so
233 * cleanup is saved here and used later
234 */
235 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
236 cleanup = 1;
237 else
238 cleanup = 0;
239
240 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
241
242 /* cleanup request if requested by initiator */
243 if (likely(cleanup)) {
244 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
245 /*
246 * lock must not be held here since it will be
247 * grabed by the called routine, too
248 */
249 zfcp_fsf_req_free(fsf_req);
250 } else {
251 /* notify initiator waiting for the requests completion */
252 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
253 /*
254 * FIXME: Race! We must not access fsf_req here as it might have been
255 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
256 * flag. It's an improbable case. But, we have the same paranoia for
257 * the cleanup flag already.
258 * Might better be handled using complete()?
259 * (setting the flag and doing wakeup ought to be atomic
260 * with regard to checking the flag as long as waitqueue is
261 * part of the to be released structure)
262 */
263 wake_up(&fsf_req->completion_wq);
264 }
265
266 out:
267 return retval;
268 }
269
270 /*
271 * function: zfcp_fsf_protstatus_eval
272 *
273 * purpose: evaluates the QTCB of the finished FSF request
274 * and initiates appropriate actions
275 * (usually calling FSF command specific handlers)
276 *
277 * returns:
278 *
279 * context:
280 *
281 * locks:
282 */
283 static int
284 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
285 {
286 int retval = 0;
287 struct zfcp_adapter *adapter = fsf_req->adapter;
288
289 ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
290
291 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
292 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
293 (unsigned long) fsf_req);
294 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
295 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
296 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
297 goto skip_protstatus;
298 }
299
300 /* log additional information provided by FSF (if any) */
301 if (unlikely(fsf_req->qtcb->header.log_length)) {
302 /* do not trust them ;-) */
303 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
304 ZFCP_LOG_NORMAL
305 ("bug: ULP (FSF logging) log data starts "
306 "beyond end of packet header. Ignored. "
307 "(start=%i, size=%li)\n",
308 fsf_req->qtcb->header.log_start,
309 sizeof(struct fsf_qtcb));
310 goto forget_log;
311 }
312 if ((size_t) (fsf_req->qtcb->header.log_start +
313 fsf_req->qtcb->header.log_length)
314 > sizeof(struct fsf_qtcb)) {
315 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
316 "beyond end of packet header. Ignored. "
317 "(start=%i, length=%i, size=%li)\n",
318 fsf_req->qtcb->header.log_start,
319 fsf_req->qtcb->header.log_length,
320 sizeof(struct fsf_qtcb));
321 goto forget_log;
322 }
323 ZFCP_LOG_TRACE("ULP log data: \n");
324 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
325 (char *) fsf_req->qtcb +
326 fsf_req->qtcb->header.log_start,
327 fsf_req->qtcb->header.log_length);
328 }
329 forget_log:
330
331 /* evaluate FSF Protocol Status */
332 switch (fsf_req->qtcb->prefix.prot_status) {
333
334 case FSF_PROT_GOOD:
335 case FSF_PROT_FSF_STATUS_PRESENTED:
336 break;
337
338 case FSF_PROT_QTCB_VERSION_ERROR:
339 ZFCP_LOG_NORMAL("error: The adapter %s contains "
340 "microcode of version 0x%x, the device driver "
341 "only supports 0x%x. Aborting.\n",
342 zfcp_get_busid_by_adapter(adapter),
343 fsf_req->qtcb->prefix.prot_status_qual.
344 version_error.fsf_version, ZFCP_QTCB_VERSION);
345 /* stop operation for this adapter */
346 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
347 zfcp_erp_adapter_shutdown(adapter, 0);
348 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
349 &fsf_req->qtcb->prefix.prot_status_qual,
350 sizeof (union fsf_prot_status_qual));
351 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
352 break;
353
354 case FSF_PROT_SEQ_NUMB_ERROR:
355 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
356 "driver (0x%x) and adapter %s (0x%x). "
357 "Restarting all operations on this adapter.\n",
358 fsf_req->qtcb->prefix.req_seq_no,
359 zfcp_get_busid_by_adapter(adapter),
360 fsf_req->qtcb->prefix.prot_status_qual.
361 sequence_error.exp_req_seq_no);
362 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
363 /* restart operation on this adapter */
364 zfcp_erp_adapter_reopen(adapter, 0);
365 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
366 &fsf_req->qtcb->prefix.prot_status_qual,
367 sizeof (union fsf_prot_status_qual));
368 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
369 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
370 break;
371
372 case FSF_PROT_UNSUPP_QTCB_TYPE:
373 ZFCP_LOG_NORMAL("error: Packet header type used by the "
374 "device driver is incompatible with "
375 "that used on adapter %s. "
376 "Stopping all operations on this adapter.\n",
377 zfcp_get_busid_by_adapter(adapter));
378 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
379 zfcp_erp_adapter_shutdown(adapter, 0);
380 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
381 &fsf_req->qtcb->prefix.prot_status_qual,
382 sizeof (union fsf_prot_status_qual));
383 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
384 break;
385
386 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
387 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
388 &fsf_req->qtcb->prefix.prot_status_qual,
389 sizeof (union fsf_prot_status_qual));
390 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
391 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
392 &(adapter->status));
393 debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
394 break;
395
396 case FSF_PROT_DUPLICATE_REQUEST_ID:
397 if (fsf_req->qtcb) {
398 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
399 "to the adapter %s is ambiguous. "
400 "Stopping all operations on this "
401 "adapter.\n",
402 *(unsigned long long *)
403 (&fsf_req->qtcb->bottom.support.
404 req_handle),
405 zfcp_get_busid_by_adapter(adapter));
406 } else {
407 ZFCP_LOG_NORMAL("bug: The request identifier %p "
408 "to the adapter %s is ambiguous. "
409 "Stopping all operations on this "
410 "adapter. "
411 "(bug: got this for an unsolicited "
412 "status read request)\n",
413 fsf_req,
414 zfcp_get_busid_by_adapter(adapter));
415 }
416 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
417 zfcp_erp_adapter_shutdown(adapter, 0);
418 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
419 &fsf_req->qtcb->prefix.prot_status_qual,
420 sizeof (union fsf_prot_status_qual));
421 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
422 break;
423
424 case FSF_PROT_LINK_DOWN:
425 /*
426 * 'test and set' is not atomic here -
427 * it's ok as long as calls to our response queue handler
428 * (and thus execution of this code here) are serialized
429 * by the qdio module
430 */
431 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
432 &adapter->status)) {
433 switch (fsf_req->qtcb->prefix.prot_status_qual.
434 locallink_error.code) {
435 case FSF_PSQ_LINK_NOLIGHT:
436 ZFCP_LOG_INFO("The local link to adapter %s "
437 "is down (no light detected).\n",
438 zfcp_get_busid_by_adapter(
439 adapter));
440 break;
441 case FSF_PSQ_LINK_WRAPPLUG:
442 ZFCP_LOG_INFO("The local link to adapter %s "
443 "is down (wrap plug detected).\n",
444 zfcp_get_busid_by_adapter(
445 adapter));
446 break;
447 case FSF_PSQ_LINK_NOFCP:
448 ZFCP_LOG_INFO("The local link to adapter %s "
449 "is down (adjacent node on "
450 "link does not support FCP).\n",
451 zfcp_get_busid_by_adapter(
452 adapter));
453 break;
454 default:
455 ZFCP_LOG_INFO("The local link to adapter %s "
456 "is down "
457 "(warning: unknown reason "
458 "code).\n",
459 zfcp_get_busid_by_adapter(
460 adapter));
461 break;
462
463 }
464 /*
465 * Due to the 'erp failed' flag the adapter won't
466 * be recovered but will be just set to 'blocked'
467 * state. All subordinary devices will have state
468 * 'blocked' and 'erp failed', too.
469 * Thus the adapter is still able to provide
470 * 'link up' status without being flooded with
471 * requests.
472 * (note: even 'close port' is not permitted)
473 */
474 ZFCP_LOG_INFO("Stopping all operations for adapter "
475 "%s.\n",
476 zfcp_get_busid_by_adapter(adapter));
477 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
478 ZFCP_STATUS_COMMON_ERP_FAILED,
479 &adapter->status);
480 zfcp_erp_adapter_reopen(adapter, 0);
481 }
482 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
483 break;
484
485 case FSF_PROT_REEST_QUEUE:
486 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
487 ZFCP_LOG_INFO("The local link to adapter with "
488 "%s was re-plugged. "
489 "Re-starting operations on this adapter.\n",
490 zfcp_get_busid_by_adapter(adapter));
491 /* All ports should be marked as ready to run again */
492 zfcp_erp_modify_adapter_status(adapter,
493 ZFCP_STATUS_COMMON_RUNNING,
494 ZFCP_SET);
495 zfcp_erp_adapter_reopen(adapter,
496 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
497 | ZFCP_STATUS_COMMON_ERP_FAILED);
498 zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
499 &fsf_req->qtcb->prefix.prot_status_qual,
500 sizeof (union fsf_prot_status_qual));
501 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
502 break;
503
504 case FSF_PROT_ERROR_STATE:
505 ZFCP_LOG_NORMAL("error: The adapter %s "
506 "has entered the error state. "
507 "Restarting all operations on this "
508 "adapter.\n",
509 zfcp_get_busid_by_adapter(adapter));
510 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
511 /* restart operation on this adapter */
512 zfcp_erp_adapter_reopen(adapter, 0);
513 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
514 &fsf_req->qtcb->prefix.prot_status_qual,
515 sizeof (union fsf_prot_status_qual));
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
518 break;
519
520 default:
521 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
522 "provided by the adapter %s "
523 "is not compatible with the device driver. "
524 "Stopping all operations on this adapter. "
525 "(debug info 0x%x).\n",
526 zfcp_get_busid_by_adapter(adapter),
527 fsf_req->qtcb->prefix.prot_status);
528 debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
529 debug_exception(adapter->erp_dbf, 0,
530 &fsf_req->qtcb->prefix.prot_status,
531 sizeof (u32));
532 zfcp_erp_adapter_shutdown(adapter, 0);
533 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
534 }
535
536 skip_protstatus:
537 /*
538 * always call specific handlers to give them a chance to do
539 * something meaningful even in error cases
540 */
541 zfcp_fsf_fsfstatus_eval(fsf_req);
542 return retval;
543 }
544
545 /*
546 * function: zfcp_fsf_fsfstatus_eval
547 *
548 * purpose: evaluates FSF status of completed FSF request
549 * and acts accordingly
550 *
551 * returns:
552 */
553 static int
554 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
555 {
556 int retval = 0;
557
558 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
559 goto skip_fsfstatus;
560 }
561
562 /* evaluate FSF Status */
563 switch (fsf_req->qtcb->header.fsf_status) {
564 case FSF_UNKNOWN_COMMAND:
565 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
566 "not known by the adapter %s "
567 "Stopping all operations on this adapter. "
568 "(debug info 0x%x).\n",
569 zfcp_get_busid_by_adapter(fsf_req->adapter),
570 fsf_req->qtcb->header.fsf_command);
571 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
572 "fsf_s_unknown");
573 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
574 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
575 &fsf_req->qtcb->header.fsf_status_qual,
576 sizeof (union fsf_status_qual));
577 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
578 break;
579
580 case FSF_FCP_RSP_AVAILABLE:
581 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
582 "SCSI stack.\n");
583 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
584 break;
585
586 case FSF_ADAPTER_STATUS_AVAILABLE:
587 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
588 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
589 break;
590
591 default:
592 break;
593 }
594
595 skip_fsfstatus:
596 /*
597 * always call specific handlers to give them a chance to do
598 * something meaningful even in error cases
599 */
600 zfcp_fsf_req_dispatch(fsf_req);
601
602 return retval;
603 }
604
605 /*
606 * function: zfcp_fsf_fsfstatus_qual_eval
607 *
608 * purpose: evaluates FSF status-qualifier of completed FSF request
609 * and acts accordingly
610 *
611 * returns:
612 */
613 static int
614 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
615 {
616 int retval = 0;
617
618 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
619 case FSF_SQ_FCP_RSP_AVAILABLE:
620 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
621 break;
622 case FSF_SQ_RETRY_IF_POSSIBLE:
623 /* The SCSI-stack may now issue retries or escalate */
624 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
625 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
626 &fsf_req->qtcb->header.fsf_status_qual,
627 sizeof (union fsf_status_qual));
628 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
629 break;
630 case FSF_SQ_COMMAND_ABORTED:
631 /* Carry the aborted state on to upper layer */
632 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
633 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
634 &fsf_req->qtcb->header.fsf_status_qual,
635 sizeof (union fsf_status_qual));
636 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
637 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
638 break;
639 case FSF_SQ_NO_RECOM:
640 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
641 "fsf_sq_no_rec");
642 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
643 "problem on the adapter %s "
644 "Stopping all operations on this adapter. ",
645 zfcp_get_busid_by_adapter(fsf_req->adapter));
646 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
647 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
648 &fsf_req->qtcb->header.fsf_status_qual,
649 sizeof (union fsf_status_qual));
650 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
651 break;
652 case FSF_SQ_ULP_PROGRAMMING_ERROR:
653 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
654 "(adapter %s)\n",
655 zfcp_get_busid_by_adapter(fsf_req->adapter));
656 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
657 "fsf_sq_ulp_err");
658 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
659 break;
660 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
661 case FSF_SQ_NO_RETRY_POSSIBLE:
662 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
663 /* dealt with in the respective functions */
664 break;
665 default:
666 ZFCP_LOG_NORMAL("bug: Additional status info could "
667 "not be interpreted properly.\n");
668 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
669 (char *) &fsf_req->qtcb->header.fsf_status_qual,
670 sizeof (union fsf_status_qual));
671 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
672 debug_exception(fsf_req->adapter->erp_dbf, 0,
673 &fsf_req->qtcb->header.fsf_status_qual.word[0],
674 sizeof (u32));
675 zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
676 &fsf_req->qtcb->header.fsf_status_qual,
677 sizeof (union fsf_status_qual));
678 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
679 break;
680 }
681
682 return retval;
683 }
684
685 /*
686 * function: zfcp_fsf_req_dispatch
687 *
688 * purpose: calls the appropriate command specific handler
689 *
690 * returns:
691 */
692 static int
693 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
694 {
695 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
696 struct zfcp_adapter *adapter = fsf_req->adapter;
697 int retval = 0;
698
699 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
700 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
701 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
702 (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
703 }
704
705 switch (fsf_req->fsf_command) {
706
707 case FSF_QTCB_FCP_CMND:
708 zfcp_fsf_send_fcp_command_handler(fsf_req);
709 break;
710
711 case FSF_QTCB_ABORT_FCP_CMND:
712 zfcp_fsf_abort_fcp_command_handler(fsf_req);
713 break;
714
715 case FSF_QTCB_SEND_GENERIC:
716 zfcp_fsf_send_ct_handler(fsf_req);
717 break;
718
719 case FSF_QTCB_OPEN_PORT_WITH_DID:
720 zfcp_fsf_open_port_handler(fsf_req);
721 break;
722
723 case FSF_QTCB_OPEN_LUN:
724 zfcp_fsf_open_unit_handler(fsf_req);
725 break;
726
727 case FSF_QTCB_CLOSE_LUN:
728 zfcp_fsf_close_unit_handler(fsf_req);
729 break;
730
731 case FSF_QTCB_CLOSE_PORT:
732 zfcp_fsf_close_port_handler(fsf_req);
733 break;
734
735 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
736 zfcp_fsf_close_physical_port_handler(fsf_req);
737 break;
738
739 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
740 zfcp_fsf_exchange_config_data_handler(fsf_req);
741 break;
742
743 case FSF_QTCB_EXCHANGE_PORT_DATA:
744 zfcp_fsf_exchange_port_data_handler(fsf_req);
745 break;
746
747 case FSF_QTCB_SEND_ELS:
748 zfcp_fsf_send_els_handler(fsf_req);
749 break;
750
751 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
752 zfcp_fsf_control_file_handler(fsf_req);
753 break;
754
755 case FSF_QTCB_UPLOAD_CONTROL_FILE:
756 zfcp_fsf_control_file_handler(fsf_req);
757 break;
758
759 default:
760 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
761 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
762 "not supported by the adapter %s\n",
763 zfcp_get_busid_by_adapter(fsf_req->adapter));
764 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
765 ZFCP_LOG_NORMAL
766 ("bug: Command issued by the device driver differs "
767 "from the command returned by the adapter %s "
768 "(debug info 0x%x, 0x%x).\n",
769 zfcp_get_busid_by_adapter(fsf_req->adapter),
770 fsf_req->fsf_command,
771 fsf_req->qtcb->header.fsf_command);
772 }
773
774 if (!erp_action)
775 return retval;
776
777 debug_text_event(adapter->erp_dbf, 3, "a_frh");
778 debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
779 zfcp_erp_async_handler(erp_action, 0);
780
781 return retval;
782 }
783
784 /*
785 * function: zfcp_fsf_status_read
786 *
787 * purpose: initiates a Status Read command at the specified adapter
788 *
789 * returns:
790 */
791 int
792 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
793 {
794 struct zfcp_fsf_req *fsf_req;
795 struct fsf_status_read_buffer *status_buffer;
796 unsigned long lock_flags;
797 volatile struct qdio_buffer_element *sbale;
798 int retval = 0;
799
800 /* setup new FSF request */
801 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
802 req_flags | ZFCP_REQ_NO_QTCB,
803 adapter->pool.fsf_req_status_read,
804 &lock_flags, &fsf_req);
805 if (retval < 0) {
806 ZFCP_LOG_INFO("error: Could not create unsolicited status "
807 "buffer for adapter %s.\n",
808 zfcp_get_busid_by_adapter(adapter));
809 goto failed_req_create;
810 }
811
812 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
813 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
814 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
815 fsf_req->sbale_curr = 2;
816
817 status_buffer =
818 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
819 if (!status_buffer) {
820 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
821 goto failed_buf;
822 }
823 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
824 fsf_req->data.status_read.buffer = status_buffer;
825
826 /* insert pointer to respective buffer */
827 sbale = zfcp_qdio_sbale_curr(fsf_req);
828 sbale->addr = (void *) status_buffer;
829 sbale->length = sizeof(struct fsf_status_read_buffer);
830
831 /* start QDIO request for this FSF request */
832 retval = zfcp_fsf_req_send(fsf_req, NULL);
833 if (retval) {
834 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
835 "environment.\n");
836 goto failed_req_send;
837 }
838
839 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
840 zfcp_get_busid_by_adapter(adapter));
841 goto out;
842
843 failed_req_send:
844 mempool_free(status_buffer, adapter->pool.data_status_read);
845
846 failed_buf:
847 zfcp_fsf_req_free(fsf_req);
848 failed_req_create:
849 out:
850 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
851 return retval;
852 }
853
854 static int
855 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
856 {
857 struct fsf_status_read_buffer *status_buffer;
858 struct zfcp_adapter *adapter;
859 struct zfcp_port *port;
860 unsigned long flags;
861
862 status_buffer = fsf_req->data.status_read.buffer;
863 adapter = fsf_req->adapter;
864
865 read_lock_irqsave(&zfcp_data.config_lock, flags);
866 list_for_each_entry(port, &adapter->port_list_head, list)
867 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
868 break;
869 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
870
871 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
872 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
873 "nonexisting port with d_id 0x%08x on "
874 "adapter %s. Ignored.\n",
875 status_buffer->d_id & ZFCP_DID_MASK,
876 zfcp_get_busid_by_adapter(adapter));
877 goto out;
878 }
879
880 switch (status_buffer->status_subtype) {
881
882 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
883 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
884 zfcp_erp_port_reopen(port, 0);
885 break;
886
887 case FSF_STATUS_READ_SUB_ERROR_PORT:
888 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
889 zfcp_erp_port_shutdown(port, 0);
890 break;
891
892 default:
893 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
894 debug_exception(adapter->erp_dbf, 0,
895 &status_buffer->status_subtype, sizeof (u32));
896 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
897 "for a reopen indication on port with "
898 "d_id 0x%08x on the adapter %s. "
899 "Ignored. (debug info 0x%x)\n",
900 status_buffer->d_id,
901 zfcp_get_busid_by_adapter(adapter),
902 status_buffer->status_subtype);
903 }
904 out:
905 return 0;
906 }
907
908 /*
909 * function: zfcp_fsf_status_read_handler
910 *
911 * purpose: is called for finished Open Port command
912 *
913 * returns:
914 */
915 static int
916 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
917 {
918 int retval = 0;
919 struct zfcp_adapter *adapter = fsf_req->adapter;
920 struct fsf_status_read_buffer *status_buffer =
921 fsf_req->data.status_read.buffer;
922
923 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
924 mempool_free(status_buffer, adapter->pool.data_status_read);
925 zfcp_fsf_req_free(fsf_req);
926 goto out;
927 }
928
929 switch (status_buffer->status_type) {
930
931 case FSF_STATUS_READ_PORT_CLOSED:
932 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
933 debug_event(adapter->erp_dbf, 3,
934 &status_buffer->d_id, sizeof (u32));
935 zfcp_fsf_status_read_port_closed(fsf_req);
936 break;
937
938 case FSF_STATUS_READ_INCOMING_ELS:
939 debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
940 zfcp_fsf_incoming_els(fsf_req);
941 break;
942
943 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
944 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
945 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
946 zfcp_get_busid_by_adapter(adapter));
947 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
948 sizeof(struct fsf_status_read_buffer));
949 break;
950
951 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
952 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
953 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
954 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
955 (char *) status_buffer,
956 sizeof (struct fsf_status_read_buffer));
957 break;
958
959 case FSF_STATUS_READ_LINK_DOWN:
960 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
961 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
962 zfcp_get_busid_by_adapter(adapter));
963 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
964 &adapter->status);
965 zfcp_erp_adapter_failed(adapter);
966 break;
967
968 case FSF_STATUS_READ_LINK_UP:
969 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
970 ZFCP_LOG_INFO("Local link to adapter %s was replugged. "
971 "Restarting operations on this adapter\n",
972 zfcp_get_busid_by_adapter(adapter));
973 /* All ports should be marked as ready to run again */
974 zfcp_erp_modify_adapter_status(adapter,
975 ZFCP_STATUS_COMMON_RUNNING,
976 ZFCP_SET);
977 zfcp_erp_adapter_reopen(adapter,
978 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
979 | ZFCP_STATUS_COMMON_ERP_FAILED);
980 break;
981
982 case FSF_STATUS_READ_CFDC_UPDATED:
983 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
984 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
985 zfcp_get_busid_by_adapter(adapter));
986 zfcp_erp_adapter_access_changed(adapter);
987 break;
988
989 case FSF_STATUS_READ_CFDC_HARDENED:
990 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
991 switch (status_buffer->status_subtype) {
992 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
993 ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n",
994 zfcp_get_busid_by_adapter(adapter));
995 break;
996 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
997 ZFCP_LOG_INFO("CFDC of adapter %s has been copied "
998 "to the secondary SE\n",
999 zfcp_get_busid_by_adapter(adapter));
1000 break;
1001 default:
1002 ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
1003 zfcp_get_busid_by_adapter(adapter));
1004 }
1005 break;
1006
1007 default:
1008 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
1009 debug_exception(adapter->erp_dbf, 0,
1010 &status_buffer->status_type, sizeof (u32));
1011 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown "
1012 "type was received (debug info 0x%x)\n",
1013 status_buffer->status_type);
1014 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1015 status_buffer);
1016 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1017 (char *) status_buffer,
1018 sizeof (struct fsf_status_read_buffer));
1019 break;
1020 }
1021 mempool_free(status_buffer, adapter->pool.data_status_read);
1022 zfcp_fsf_req_free(fsf_req);
1023 /*
1024 * recycle buffer and start new request repeat until outbound
1025 * queue is empty or adapter shutdown is requested
1026 */
1027 /*
1028 * FIXME(qdio):
1029 * we may wait in the req_create for 5s during shutdown, so
1030 * qdio_cleanup will have to wait at least that long before returning
1031 * with failure to allow us a proper cleanup under all circumstances
1032 */
1033 /*
1034 * FIXME:
1035 * allocation failure possible? (Is this code needed?)
1036 */
1037 retval = zfcp_fsf_status_read(adapter, 0);
1038 if (retval < 0) {
1039 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1040 "request for the adapter %s.\n",
1041 zfcp_get_busid_by_adapter(adapter));
1042 /* temporary fix to avoid status read buffer shortage */
1043 adapter->status_read_failed++;
1044 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1045 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1046 ZFCP_LOG_INFO("restart adapter %s due to status read "
1047 "buffer shortage\n",
1048 zfcp_get_busid_by_adapter(adapter));
1049 zfcp_erp_adapter_reopen(adapter, 0);
1050 }
1051 }
1052 out:
1053 return retval;
1054 }
1055
1056 /*
1057 * function: zfcp_fsf_abort_fcp_command
1058 *
1059 * purpose: tells FSF to abort a running SCSI command
1060 *
1061 * returns: address of initiated FSF request
1062 * NULL - request could not be initiated
1063 *
1064 * FIXME(design): should be watched by a timeout !!!
1065 * FIXME(design) shouldn't this be modified to return an int
1066 * also...don't know how though
1067 */
1068 struct zfcp_fsf_req *
1069 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1070 struct zfcp_adapter *adapter,
1071 struct zfcp_unit *unit, int req_flags)
1072 {
1073 volatile struct qdio_buffer_element *sbale;
1074 unsigned long lock_flags;
1075 struct zfcp_fsf_req *fsf_req = NULL;
1076 int retval = 0;
1077
1078 /* setup new FSF request */
1079 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1080 req_flags, adapter->pool.fsf_req_abort,
1081 &lock_flags, &fsf_req);
1082 if (retval < 0) {
1083 ZFCP_LOG_INFO("error: Failed to create an abort command "
1084 "request for lun 0x%016Lx on port 0x%016Lx "
1085 "on adapter %s.\n",
1086 unit->fcp_lun,
1087 unit->port->wwpn,
1088 zfcp_get_busid_by_adapter(adapter));
1089 goto out;
1090 }
1091
1092 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1093 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1094 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1095
1096 fsf_req->data.abort_fcp_command.unit = unit;
1097
1098 /* set handles of unit and its parent port in QTCB */
1099 fsf_req->qtcb->header.lun_handle = unit->handle;
1100 fsf_req->qtcb->header.port_handle = unit->port->handle;
1101
1102 /* set handle of request which should be aborted */
1103 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1104
1105 /* start QDIO request for this FSF request */
1106
1107 zfcp_fsf_start_scsi_er_timer(adapter);
1108 retval = zfcp_fsf_req_send(fsf_req, NULL);
1109 if (retval) {
1110 del_timer(&adapter->scsi_er_timer);
1111 ZFCP_LOG_INFO("error: Failed to send abort command request "
1112 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1113 zfcp_get_busid_by_adapter(adapter),
1114 unit->port->wwpn, unit->fcp_lun);
1115 zfcp_fsf_req_free(fsf_req);
1116 fsf_req = NULL;
1117 goto out;
1118 }
1119
1120 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1121 "(adapter%s, port d_id=0x%08x, "
1122 "unit x%016Lx, old_req_id=0x%lx)\n",
1123 zfcp_get_busid_by_adapter(adapter),
1124 unit->port->d_id,
1125 unit->fcp_lun, old_req_id);
1126 out:
1127 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1128 return fsf_req;
1129 }
1130
1131 /*
1132 * function: zfcp_fsf_abort_fcp_command_handler
1133 *
1134 * purpose: is called for finished Abort FCP Command request
1135 *
1136 * returns:
1137 */
1138 static int
1139 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1140 {
1141 int retval = -EINVAL;
1142 struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit;
1143 unsigned char status_qual =
1144 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1145
1146 del_timer(&new_fsf_req->adapter->scsi_er_timer);
1147
1148 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1149 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1150 goto skip_fsfstatus;
1151 }
1152
1153 /* evaluate FSF status in QTCB */
1154 switch (new_fsf_req->qtcb->header.fsf_status) {
1155
1156 case FSF_PORT_HANDLE_NOT_VALID:
1157 if (status_qual >> 4 != status_qual % 0xf) {
1158 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1159 "fsf_s_phand_nv0");
1160 /*
1161 * In this case a command that was sent prior to a port
1162 * reopen was aborted (handles are different). This is
1163 * fine.
1164 */
1165 } else {
1166 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1167 "port 0x%016Lx on adapter %s invalid. "
1168 "This may happen occasionally.\n",
1169 unit->port->handle,
1170 unit->port->wwpn,
1171 zfcp_get_busid_by_unit(unit));
1172 ZFCP_LOG_INFO("status qualifier:\n");
1173 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1174 (char *) &new_fsf_req->qtcb->header.
1175 fsf_status_qual,
1176 sizeof (union fsf_status_qual));
1177 /* Let's hope this sorts out the mess */
1178 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1179 "fsf_s_phand_nv1");
1180 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1181 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1182 }
1183 break;
1184
1185 case FSF_LUN_HANDLE_NOT_VALID:
1186 if (status_qual >> 4 != status_qual % 0xf) {
1187 /* 2 */
1188 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1189 "fsf_s_lhand_nv0");
1190 /*
1191 * In this case a command that was sent prior to a unit
1192 * reopen was aborted (handles are different).
1193 * This is fine.
1194 */
1195 } else {
1196 ZFCP_LOG_INFO
1197 ("Warning: Temporary LUN identifier 0x%x of LUN "
1198 "0x%016Lx on port 0x%016Lx on adapter %s is "
1199 "invalid. This may happen in rare cases. "
1200 "Trying to re-establish link.\n",
1201 unit->handle,
1202 unit->fcp_lun,
1203 unit->port->wwpn,
1204 zfcp_get_busid_by_unit(unit));
1205 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1206 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1207 (char *) &new_fsf_req->qtcb->header.
1208 fsf_status_qual,
1209 sizeof (union fsf_status_qual));
1210 /* Let's hope this sorts out the mess */
1211 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1212 "fsf_s_lhand_nv1");
1213 zfcp_erp_port_reopen(unit->port, 0);
1214 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1215 }
1216 break;
1217
1218 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1219 retval = 0;
1220 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1221 "fsf_s_no_exist");
1222 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1223 break;
1224
1225 case FSF_PORT_BOXED:
1226 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1227 "be reopened\n", unit->port->wwpn,
1228 zfcp_get_busid_by_unit(unit));
1229 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1230 "fsf_s_pboxed");
1231 zfcp_erp_port_boxed(unit->port);
1232 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1233 | ZFCP_STATUS_FSFREQ_RETRY;
1234 break;
1235
1236 case FSF_LUN_BOXED:
1237 ZFCP_LOG_INFO(
1238 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1239 "to be reopened\n",
1240 unit->fcp_lun, unit->port->wwpn,
1241 zfcp_get_busid_by_unit(unit));
1242 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1243 zfcp_erp_unit_boxed(unit);
1244 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1245 | ZFCP_STATUS_FSFREQ_RETRY;
1246 break;
1247
1248 case FSF_ADAPTER_STATUS_AVAILABLE:
1249 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1250 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1251 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1252 "fsf_sq_ltest");
1253 zfcp_test_link(unit->port);
1254 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1255 break;
1256 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1257 /* SCSI stack will escalate */
1258 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1259 "fsf_sq_ulp");
1260 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1261 break;
1262 default:
1263 ZFCP_LOG_NORMAL
1264 ("bug: Wrong status qualifier 0x%x arrived.\n",
1265 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1266 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1267 "fsf_sq_inval:");
1268 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1269 &new_fsf_req->qtcb->header.
1270 fsf_status_qual.word[0], sizeof (u32));
1271 break;
1272 }
1273 break;
1274
1275 case FSF_GOOD:
1276 retval = 0;
1277 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1278 break;
1279
1280 default:
1281 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1282 "(debug info 0x%x)\n",
1283 new_fsf_req->qtcb->header.fsf_status);
1284 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1285 "fsf_s_inval:");
1286 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1287 &new_fsf_req->qtcb->header.fsf_status,
1288 sizeof (u32));
1289 break;
1290 }
1291 skip_fsfstatus:
1292 return retval;
1293 }
1294
1295 /**
1296 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1297 * one SBALE
1298 * Two scatter-gather lists are passed, one for the reqeust and one for the
1299 * response.
1300 */
1301 static inline int
1302 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1303 struct scatterlist *resp, int resp_count)
1304 {
1305 return ((req_count == 1) &&
1306 (resp_count == 1) &&
1307 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1308 PAGE_MASK) ==
1309 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1310 req[0].length - 1) & PAGE_MASK)) &&
1311 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1312 PAGE_MASK) ==
1313 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1314 resp[0].length - 1) & PAGE_MASK)));
1315 }
1316
1317 /**
1318 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1319 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1320 * the request
1321 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1322 * a struct zfcp_fsf_req
1323 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1324 * is sent within error recovery
1325 */
1326 int
1327 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1328 struct zfcp_erp_action *erp_action)
1329 {
1330 volatile struct qdio_buffer_element *sbale;
1331 struct zfcp_port *port;
1332 struct zfcp_adapter *adapter;
1333 struct zfcp_fsf_req *fsf_req;
1334 unsigned long lock_flags;
1335 int bytes;
1336 int ret = 0;
1337
1338 port = ct->port;
1339 adapter = port->adapter;
1340
1341 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1342 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1343 pool, &lock_flags, &fsf_req);
1344 if (ret < 0) {
1345 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1346 "adapter: %s\n",
1347 zfcp_get_busid_by_adapter(adapter));
1348 goto failed_req;
1349 }
1350
1351 if (erp_action != NULL) {
1352 erp_action->fsf_req = fsf_req;
1353 fsf_req->erp_action = erp_action;
1354 }
1355
1356 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1357 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1358 ct->resp, ct->resp_count)){
1359 /* both request buffer and response buffer
1360 fit into one sbale each */
1361 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1362 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1363 sbale[2].length = ct->req[0].length;
1364 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1365 sbale[3].length = ct->resp[0].length;
1366 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1367 } else if (adapter->supported_features &
1368 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1369 /* try to use chained SBALs */
1370 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1371 SBAL_FLAGS0_TYPE_WRITE_READ,
1372 ct->req, ct->req_count,
1373 ZFCP_MAX_SBALS_PER_CT_REQ);
1374 if (bytes <= 0) {
1375 ZFCP_LOG_INFO("error: creation of CT request failed "
1376 "on adapter %s\n",
1377 zfcp_get_busid_by_adapter(adapter));
1378 if (bytes == 0)
1379 ret = -ENOMEM;
1380 else
1381 ret = bytes;
1382
1383 goto failed_send;
1384 }
1385 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1386 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1387 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1388 SBAL_FLAGS0_TYPE_WRITE_READ,
1389 ct->resp, ct->resp_count,
1390 ZFCP_MAX_SBALS_PER_CT_REQ);
1391 if (bytes <= 0) {
1392 ZFCP_LOG_INFO("error: creation of CT request failed "
1393 "on adapter %s\n",
1394 zfcp_get_busid_by_adapter(adapter));
1395 if (bytes == 0)
1396 ret = -ENOMEM;
1397 else
1398 ret = bytes;
1399
1400 goto failed_send;
1401 }
1402 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1403 } else {
1404 /* reject send generic request */
1405 ZFCP_LOG_INFO(
1406 "error: microcode does not support chained SBALs,"
1407 "CT request too big (adapter %s)\n",
1408 zfcp_get_busid_by_adapter(adapter));
1409 ret = -EOPNOTSUPP;
1410 goto failed_send;
1411 }
1412
1413 /* settings in QTCB */
1414 fsf_req->qtcb->header.port_handle = port->handle;
1415 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1416 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1417 fsf_req->data.send_ct = ct;
1418
1419 /* start QDIO request for this FSF request */
1420 ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1421 if (ret) {
1422 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1423 "(adapter %s, port 0x%016Lx)\n",
1424 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1425 goto failed_send;
1426 }
1427
1428 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1429 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1430 goto out;
1431
1432 failed_send:
1433 zfcp_fsf_req_free(fsf_req);
1434 if (erp_action != NULL) {
1435 erp_action->fsf_req = NULL;
1436 }
1437 failed_req:
1438 out:
1439 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1440 lock_flags);
1441 return ret;
1442 }
1443
1444 /**
1445 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1446 * @fsf_req: pointer to struct zfcp_fsf_req
1447 *
1448 * Data specific for the Generic Service request is passed by
1449 * fsf_req->data.send_ct
1450 * Usually a specific handler for the request is called via
1451 * fsf_req->data.send_ct->handler at end of this function.
1452 */
1453 static int
1454 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1455 {
1456 struct zfcp_port *port;
1457 struct zfcp_adapter *adapter;
1458 struct zfcp_send_ct *send_ct;
1459 struct fsf_qtcb_header *header;
1460 struct fsf_qtcb_bottom_support *bottom;
1461 int retval = -EINVAL;
1462 u16 subtable, rule, counter;
1463
1464 adapter = fsf_req->adapter;
1465 send_ct = fsf_req->data.send_ct;
1466 port = send_ct->port;
1467 header = &fsf_req->qtcb->header;
1468 bottom = &fsf_req->qtcb->bottom.support;
1469
1470 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1471 goto skip_fsfstatus;
1472
1473 /* evaluate FSF status in QTCB */
1474 switch (header->fsf_status) {
1475
1476 case FSF_GOOD:
1477 retval = 0;
1478 break;
1479
1480 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1481 if (adapter->fc_service_class <= 3) {
1482 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1483 "class %d.\n",
1484 zfcp_get_busid_by_port(port),
1485 adapter->fc_service_class);
1486 } else {
1487 ZFCP_LOG_INFO("bug: The fibre channel class at the "
1488 "adapter %s is invalid. "
1489 "(debug info %d)\n",
1490 zfcp_get_busid_by_port(port),
1491 adapter->fc_service_class);
1492 }
1493 /* stop operation for this adapter */
1494 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1495 zfcp_erp_adapter_shutdown(adapter, 0);
1496 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1497 break;
1498
1499 case FSF_ADAPTER_STATUS_AVAILABLE:
1500 switch (header->fsf_status_qual.word[0]){
1501 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1502 /* reopening link to port */
1503 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1504 zfcp_test_link(port);
1505 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1506 break;
1507 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1508 /* ERP strategy will escalate */
1509 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1510 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1511 break;
1512 default:
1513 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1514 "arrived.\n",
1515 header->fsf_status_qual.word[0]);
1516 break;
1517 }
1518 break;
1519
1520 case FSF_ACCESS_DENIED:
1521 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1522 "command (adapter %s, port d_id=0x%08x)\n",
1523 zfcp_get_busid_by_port(port), port->d_id);
1524 for (counter = 0; counter < 2; counter++) {
1525 subtable = header->fsf_status_qual.halfword[counter * 2];
1526 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1527 switch (subtable) {
1528 case FSF_SQ_CFDC_SUBTABLE_OS:
1529 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1530 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1531 case FSF_SQ_CFDC_SUBTABLE_LUN:
1532 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1533 zfcp_act_subtable_type[subtable], rule);
1534 break;
1535 }
1536 }
1537 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1538 zfcp_erp_port_access_denied(port);
1539 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1540 break;
1541
1542 case FSF_GENERIC_COMMAND_REJECTED:
1543 ZFCP_LOG_INFO("generic service command rejected "
1544 "(adapter %s, port d_id=0x%08x)\n",
1545 zfcp_get_busid_by_port(port), port->d_id);
1546 ZFCP_LOG_INFO("status qualifier:\n");
1547 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1548 (char *) &header->fsf_status_qual,
1549 sizeof (union fsf_status_qual));
1550 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1551 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1552 break;
1553
1554 case FSF_PORT_HANDLE_NOT_VALID:
1555 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1556 "0x%016Lx on adapter %s invalid. This may "
1557 "happen occasionally.\n", port->handle,
1558 port->wwpn, zfcp_get_busid_by_port(port));
1559 ZFCP_LOG_INFO("status qualifier:\n");
1560 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1561 (char *) &header->fsf_status_qual,
1562 sizeof (union fsf_status_qual));
1563 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1564 zfcp_erp_adapter_reopen(adapter, 0);
1565 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1566 break;
1567
1568 case FSF_PORT_BOXED:
1569 ZFCP_LOG_INFO("port needs to be reopened "
1570 "(adapter %s, port d_id=0x%08x)\n",
1571 zfcp_get_busid_by_port(port), port->d_id);
1572 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1573 zfcp_erp_port_boxed(port);
1574 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1575 | ZFCP_STATUS_FSFREQ_RETRY;
1576 break;
1577
1578 /* following states should never occure, all cases avoided
1579 in zfcp_fsf_send_ct - but who knows ... */
1580 case FSF_PAYLOAD_SIZE_MISMATCH:
1581 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1582 "req_buf_length=%d, resp_buf_length=%d)\n",
1583 zfcp_get_busid_by_adapter(adapter),
1584 bottom->req_buf_length, bottom->resp_buf_length);
1585 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1586 break;
1587 case FSF_REQUEST_SIZE_TOO_LARGE:
1588 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1589 "req_buf_length=%d)\n",
1590 zfcp_get_busid_by_adapter(adapter),
1591 bottom->req_buf_length);
1592 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1593 break;
1594 case FSF_RESPONSE_SIZE_TOO_LARGE:
1595 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1596 "resp_buf_length=%d)\n",
1597 zfcp_get_busid_by_adapter(adapter),
1598 bottom->resp_buf_length);
1599 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1600 break;
1601 case FSF_SBAL_MISMATCH:
1602 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1603 "resp_buf_length=%d)\n",
1604 zfcp_get_busid_by_adapter(adapter),
1605 bottom->req_buf_length, bottom->resp_buf_length);
1606 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1607 break;
1608
1609 default:
1610 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1611 "(debug info 0x%x)\n", header->fsf_status);
1612 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1613 debug_exception(adapter->erp_dbf, 0,
1614 &header->fsf_status_qual.word[0], sizeof (u32));
1615 break;
1616 }
1617
1618 skip_fsfstatus:
1619 send_ct->status = retval;
1620
1621 if (send_ct->handler != NULL)
1622 send_ct->handler(send_ct->handler_data);
1623
1624 return retval;
1625 }
1626
1627 /**
1628 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1629 * @els: pointer to struct zfcp_send_els which contains all needed data for
1630 * the command.
1631 */
1632 int
1633 zfcp_fsf_send_els(struct zfcp_send_els *els)
1634 {
1635 volatile struct qdio_buffer_element *sbale;
1636 struct zfcp_fsf_req *fsf_req;
1637 fc_id_t d_id;
1638 struct zfcp_adapter *adapter;
1639 unsigned long lock_flags;
1640 int bytes;
1641 int ret = 0;
1642
1643 d_id = els->d_id;
1644 adapter = els->adapter;
1645
1646 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1647 ZFCP_REQ_AUTO_CLEANUP,
1648 NULL, &lock_flags, &fsf_req);
1649 if (ret < 0) {
1650 ZFCP_LOG_INFO("error: creation of ELS request failed "
1651 "(adapter %s, port d_id: 0x%08x)\n",
1652 zfcp_get_busid_by_adapter(adapter), d_id);
1653 goto failed_req;
1654 }
1655
1656 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1657 if (zfcp_use_one_sbal(els->req, els->req_count,
1658 els->resp, els->resp_count)){
1659 /* both request buffer and response buffer
1660 fit into one sbale each */
1661 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1662 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1663 sbale[2].length = els->req[0].length;
1664 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1665 sbale[3].length = els->resp[0].length;
1666 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1667 } else if (adapter->supported_features &
1668 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1669 /* try to use chained SBALs */
1670 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1671 SBAL_FLAGS0_TYPE_WRITE_READ,
1672 els->req, els->req_count,
1673 ZFCP_MAX_SBALS_PER_ELS_REQ);
1674 if (bytes <= 0) {
1675 ZFCP_LOG_INFO("error: creation of ELS request failed "
1676 "(adapter %s, port d_id: 0x%08x)\n",
1677 zfcp_get_busid_by_adapter(adapter), d_id);
1678 if (bytes == 0) {
1679 ret = -ENOMEM;
1680 } else {
1681 ret = bytes;
1682 }
1683 goto failed_send;
1684 }
1685 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1686 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1687 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1688 SBAL_FLAGS0_TYPE_WRITE_READ,
1689 els->resp, els->resp_count,
1690 ZFCP_MAX_SBALS_PER_ELS_REQ);
1691 if (bytes <= 0) {
1692 ZFCP_LOG_INFO("error: creation of ELS request failed "
1693 "(adapter %s, port d_id: 0x%08x)\n",
1694 zfcp_get_busid_by_adapter(adapter), d_id);
1695 if (bytes == 0) {
1696 ret = -ENOMEM;
1697 } else {
1698 ret = bytes;
1699 }
1700 goto failed_send;
1701 }
1702 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1703 } else {
1704 /* reject request */
1705 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1706 ", ELS request too big (adapter %s, "
1707 "port d_id: 0x%08x)\n",
1708 zfcp_get_busid_by_adapter(adapter), d_id);
1709 ret = -EOPNOTSUPP;
1710 goto failed_send;
1711 }
1712
1713 /* settings in QTCB */
1714 fsf_req->qtcb->bottom.support.d_id = d_id;
1715 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1716 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1717 fsf_req->data.send_els = els;
1718
1719 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1720
1721 /* start QDIO request for this FSF request */
1722 ret = zfcp_fsf_req_send(fsf_req, els->timer);
1723 if (ret) {
1724 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1725 "(adapter %s, port d_id: 0x%08x)\n",
1726 zfcp_get_busid_by_adapter(adapter), d_id);
1727 goto failed_send;
1728 }
1729
1730 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1731 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1732 goto out;
1733
1734 failed_send:
1735 zfcp_fsf_req_free(fsf_req);
1736
1737 failed_req:
1738 out:
1739 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1740 lock_flags);
1741
1742 return ret;
1743 }
1744
1745 /**
1746 * zfcp_fsf_send_els_handler - handler for ELS commands
1747 * @fsf_req: pointer to struct zfcp_fsf_req
1748 *
1749 * Data specific for the ELS command is passed by
1750 * fsf_req->data.send_els
1751 * Usually a specific handler for the command is called via
1752 * fsf_req->data.send_els->handler at end of this function.
1753 */
1754 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1755 {
1756 struct zfcp_adapter *adapter;
1757 struct zfcp_port *port;
1758 fc_id_t d_id;
1759 struct fsf_qtcb_header *header;
1760 struct fsf_qtcb_bottom_support *bottom;
1761 struct zfcp_send_els *send_els;
1762 int retval = -EINVAL;
1763 u16 subtable, rule, counter;
1764
1765 send_els = fsf_req->data.send_els;
1766 adapter = send_els->adapter;
1767 port = send_els->port;
1768 d_id = send_els->d_id;
1769 header = &fsf_req->qtcb->header;
1770 bottom = &fsf_req->qtcb->bottom.support;
1771
1772 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1773 goto skip_fsfstatus;
1774
1775 switch (header->fsf_status) {
1776
1777 case FSF_GOOD:
1778 retval = 0;
1779 break;
1780
1781 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1782 if (adapter->fc_service_class <= 3) {
1783 ZFCP_LOG_INFO("error: adapter %s does "
1784 "not support fibrechannel class %d.\n",
1785 zfcp_get_busid_by_adapter(adapter),
1786 adapter->fc_service_class);
1787 } else {
1788 ZFCP_LOG_INFO("bug: The fibrechannel class at "
1789 "adapter %s is invalid. "
1790 "(debug info %d)\n",
1791 zfcp_get_busid_by_adapter(adapter),
1792 adapter->fc_service_class);
1793 }
1794 /* stop operation for this adapter */
1795 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1796 zfcp_erp_adapter_shutdown(adapter, 0);
1797 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1798 break;
1799
1800 case FSF_ADAPTER_STATUS_AVAILABLE:
1801 switch (header->fsf_status_qual.word[0]){
1802 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1803 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1804 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1805 zfcp_test_link(port);
1806 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1807 break;
1808 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1809 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1810 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1811 retval =
1812 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1813 (struct zfcp_ls_rjt_par *)
1814 &header->fsf_status_qual.word[2]);
1815 break;
1816 case FSF_SQ_RETRY_IF_POSSIBLE:
1817 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1818 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1819 break;
1820 default:
1821 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1822 header->fsf_status_qual.word[0]);
1823 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1824 (char*)header->fsf_status_qual.word, 16);
1825 }
1826 break;
1827
1828 case FSF_ELS_COMMAND_REJECTED:
1829 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1830 "prohibited sending "
1831 "(adapter: %s, port d_id: 0x%08x)\n",
1832 zfcp_get_busid_by_adapter(adapter), d_id);
1833
1834 break;
1835
1836 case FSF_PAYLOAD_SIZE_MISMATCH:
1837 ZFCP_LOG_INFO(
1838 "ELS request size and ELS response size must be either "
1839 "both 0, or both greater than 0 "
1840 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1841 zfcp_get_busid_by_adapter(adapter),
1842 bottom->req_buf_length,
1843 bottom->resp_buf_length);
1844 break;
1845
1846 case FSF_REQUEST_SIZE_TOO_LARGE:
1847 ZFCP_LOG_INFO(
1848 "Length of the ELS request buffer, "
1849 "specified in QTCB bottom, "
1850 "exceeds the size of the buffers "
1851 "that have been allocated for ELS request data "
1852 "(adapter: %s, req_buf_length=%d)\n",
1853 zfcp_get_busid_by_adapter(adapter),
1854 bottom->req_buf_length);
1855 break;
1856
1857 case FSF_RESPONSE_SIZE_TOO_LARGE:
1858 ZFCP_LOG_INFO(
1859 "Length of the ELS response buffer, "
1860 "specified in QTCB bottom, "
1861 "exceeds the size of the buffers "
1862 "that have been allocated for ELS response data "
1863 "(adapter: %s, resp_buf_length=%d)\n",
1864 zfcp_get_busid_by_adapter(adapter),
1865 bottom->resp_buf_length);
1866 break;
1867
1868 case FSF_SBAL_MISMATCH:
1869 /* should never occure, avoided in zfcp_fsf_send_els */
1870 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1871 "resp_buf_length=%d)\n",
1872 zfcp_get_busid_by_adapter(adapter),
1873 bottom->req_buf_length, bottom->resp_buf_length);
1874 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1875 break;
1876
1877 case FSF_ACCESS_DENIED:
1878 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1879 "(adapter %s, port d_id=0x%08x)\n",
1880 zfcp_get_busid_by_adapter(adapter), d_id);
1881 for (counter = 0; counter < 2; counter++) {
1882 subtable = header->fsf_status_qual.halfword[counter * 2];
1883 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1884 switch (subtable) {
1885 case FSF_SQ_CFDC_SUBTABLE_OS:
1886 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1887 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1888 case FSF_SQ_CFDC_SUBTABLE_LUN:
1889 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1890 zfcp_act_subtable_type[subtable], rule);
1891 break;
1892 }
1893 }
1894 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1895 if (port != NULL)
1896 zfcp_erp_port_access_denied(port);
1897 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898 break;
1899
1900 default:
1901 ZFCP_LOG_NORMAL(
1902 "bug: An unknown FSF Status was presented "
1903 "(adapter: %s, fsf_status=0x%08x)\n",
1904 zfcp_get_busid_by_adapter(adapter),
1905 header->fsf_status);
1906 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1907 debug_exception(adapter->erp_dbf, 0,
1908 &header->fsf_status_qual.word[0], sizeof(u32));
1909 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1910 break;
1911 }
1912
1913 skip_fsfstatus:
1914 send_els->status = retval;
1915
1916 if (send_els->handler != 0)
1917 send_els->handler(send_els->handler_data);
1918
1919 return retval;
1920 }
1921
1922 /*
1923 * function:
1924 *
1925 * purpose:
1926 *
1927 * returns: address of initiated FSF request
1928 * NULL - request could not be initiated
1929 */
1930 int
1931 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1932 {
1933 volatile struct qdio_buffer_element *sbale;
1934 unsigned long lock_flags;
1935 int retval = 0;
1936
1937 /* setup new FSF request */
1938 retval = zfcp_fsf_req_create(erp_action->adapter,
1939 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1940 ZFCP_REQ_AUTO_CLEANUP,
1941 erp_action->adapter->pool.fsf_req_erp,
1942 &lock_flags, &(erp_action->fsf_req));
1943 if (retval < 0) {
1944 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1945 "data request for adapter %s.\n",
1946 zfcp_get_busid_by_adapter(erp_action->adapter));
1947 goto out;
1948 }
1949
1950 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
1951 erp_action->fsf_req->sbal_curr, 0);
1952 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1953 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1954
1955 erp_action->fsf_req->erp_action = erp_action;
1956 erp_action->fsf_req->qtcb->bottom.config.feature_selection =
1957 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
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
1994 bottom = &fsf_req->qtcb->bottom.config;
1995 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
1996 bottom->low_qtcb_version, bottom->high_qtcb_version);
1997 adapter->fsf_lic_version = bottom->lic_version;
1998 adapter->supported_features = bottom->supported_features;
1999 adapter->peer_wwpn = 0;
2000 adapter->peer_wwnn = 0;
2001 adapter->peer_d_id = 0;
2002
2003 if (xchg_ok) {
2004 adapter->wwnn = bottom->nport_serv_param.wwnn;
2005 adapter->wwpn = bottom->nport_serv_param.wwpn;
2006 adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
2007 adapter->fc_topology = bottom->fc_topology;
2008 adapter->fc_link_speed = bottom->fc_link_speed;
2009 adapter->hydra_version = bottom->adapter_type;
2010 } else {
2011 adapter->wwnn = 0;
2012 adapter->wwpn = 0;
2013 adapter->s_id = 0;
2014 adapter->fc_topology = 0;
2015 adapter->fc_link_speed = 0;
2016 adapter->hydra_version = 0;
2017 }
2018
2019 if (adapter->fc_topology == FSF_TOPO_P2P) {
2020 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2021 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2022 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2023 }
2024
2025 if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
2026 adapter->hardware_version = bottom->hardware_version;
2027 memcpy(adapter->serial_number, bottom->serial_number, 17);
2028 EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
2029 }
2030
2031 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
2032 "WWNN 0x%016Lx, "
2033 "WWPN 0x%016Lx, "
2034 "S_ID 0x%08x,\n"
2035 "adapter version 0x%x, "
2036 "LIC version 0x%x, "
2037 "FC link speed %d Gb/s\n",
2038 zfcp_get_busid_by_adapter(adapter),
2039 adapter->wwnn,
2040 adapter->wwpn,
2041 (unsigned int) adapter->s_id,
2042 adapter->hydra_version,
2043 adapter->fsf_lic_version,
2044 adapter->fc_link_speed);
2045 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2046 ZFCP_LOG_NORMAL("error: the adapter %s "
2047 "only supports newer control block "
2048 "versions in comparison to this device "
2049 "driver (try updated device driver)\n",
2050 zfcp_get_busid_by_adapter(adapter));
2051 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2052 zfcp_erp_adapter_shutdown(adapter, 0);
2053 return -EIO;
2054 }
2055 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2056 ZFCP_LOG_NORMAL("error: the adapter %s "
2057 "only supports older control block "
2058 "versions than this device driver uses"
2059 "(consider a microcode upgrade)\n",
2060 zfcp_get_busid_by_adapter(adapter));
2061 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2062 zfcp_erp_adapter_shutdown(adapter, 0);
2063 return -EIO;
2064 }
2065 zfcp_set_fc_host_attrs(adapter);
2066 return 0;
2067 }
2068
2069 /*
2070 * function: zfcp_fsf_exchange_config_data_handler
2071 *
2072 * purpose: is called for finished Exchange Configuration Data command
2073 *
2074 * returns:
2075 */
2076 static int
2077 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2078 {
2079 struct fsf_qtcb_bottom_config *bottom;
2080 struct zfcp_adapter *adapter = fsf_req->adapter;
2081
2082 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2083 return -EIO;
2084
2085 switch (fsf_req->qtcb->header.fsf_status) {
2086
2087 case FSF_GOOD:
2088 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2089 return -EIO;
2090
2091 switch (adapter->fc_topology) {
2092 case FSF_TOPO_P2P:
2093 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2094 "configuration detected at adapter %s\n"
2095 "Peer WWNN 0x%016llx, "
2096 "peer WWPN 0x%016llx, "
2097 "peer d_id 0x%06x\n",
2098 zfcp_get_busid_by_adapter(adapter),
2099 adapter->peer_wwnn,
2100 adapter->peer_wwpn,
2101 adapter->peer_d_id);
2102 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2103 "top-p-to-p");
2104 break;
2105 case FSF_TOPO_AL:
2106 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2107 "topology detected at adapter %s "
2108 "unsupported, shutting down adapter\n",
2109 zfcp_get_busid_by_adapter(adapter));
2110 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2111 "top-al");
2112 zfcp_erp_adapter_shutdown(adapter, 0);
2113 return -EIO;
2114 case FSF_TOPO_FABRIC:
2115 ZFCP_LOG_INFO("Switched fabric fibrechannel "
2116 "network detected at adapter %s.\n",
2117 zfcp_get_busid_by_adapter(adapter));
2118 break;
2119 default:
2120 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2121 "reported by the exchange "
2122 "configuration command for "
2123 "the adapter %s is not "
2124 "of a type known to the zfcp "
2125 "driver, shutting down adapter\n",
2126 zfcp_get_busid_by_adapter(adapter));
2127 adapter->fc_topology = FSF_TOPO_ERROR;
2128 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2129 "unknown-topo");
2130 zfcp_erp_adapter_shutdown(adapter, 0);
2131 return -EIO;
2132 }
2133 bottom = &fsf_req->qtcb->bottom.config;
2134 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2135 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2136 "allowed by the adapter %s "
2137 "is lower than the minimum "
2138 "required by the driver (%ld bytes).\n",
2139 bottom->max_qtcb_size,
2140 zfcp_get_busid_by_adapter(adapter),
2141 sizeof(struct fsf_qtcb));
2142 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2143 "qtcb-size");
2144 debug_event(fsf_req->adapter->erp_dbf, 0,
2145 &bottom->max_qtcb_size, sizeof (u32));
2146 zfcp_erp_adapter_shutdown(adapter, 0);
2147 return -EIO;
2148 }
2149 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2150 &adapter->status);
2151 break;
2152 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2153 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2154
2155 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2156 return -EIO;
2157
2158 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2159 zfcp_get_busid_by_adapter(adapter));
2160 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2161 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2162 &adapter->status);
2163 zfcp_erp_adapter_failed(adapter);
2164 break;
2165 default:
2166 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2167 debug_event(fsf_req->adapter->erp_dbf, 0,
2168 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2169 zfcp_erp_adapter_shutdown(adapter, 0);
2170 return -EIO;
2171 }
2172 return 0;
2173 }
2174
2175 /**
2176 * zfcp_fsf_exchange_port_data - request information about local port
2177 * @adapter: for which port data is requested
2178 * @data: response to exchange port data request
2179 */
2180 int
2181 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2182 struct fsf_qtcb_bottom_port *data)
2183 {
2184 volatile struct qdio_buffer_element *sbale;
2185 int retval = 0;
2186 unsigned long lock_flags;
2187 struct zfcp_fsf_req *fsf_req;
2188 struct timer_list *timer;
2189
2190 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2191 ZFCP_LOG_INFO("error: exchange port data "
2192 "command not supported by adapter %s\n",
2193 zfcp_get_busid_by_adapter(adapter));
2194 return -EOPNOTSUPP;
2195 }
2196
2197 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2198 if (!timer)
2199 return -ENOMEM;
2200
2201 /* setup new FSF request */
2202 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2203 0, 0, &lock_flags, &fsf_req);
2204 if (retval < 0) {
2205 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2206 "exchange port data request for"
2207 "the adapter %s.\n",
2208 zfcp_get_busid_by_adapter(adapter));
2209 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2210 lock_flags);
2211 goto out;
2212 }
2213
2214 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2215 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2216 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2217
2218 fsf_req->data.port_data = data;
2219
2220 init_timer(timer);
2221 timer->function = zfcp_fsf_request_timeout_handler;
2222 timer->data = (unsigned long) adapter;
2223 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2224
2225 retval = zfcp_fsf_req_send(fsf_req, timer);
2226 if (retval) {
2227 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2228 "command on the adapter %s\n",
2229 zfcp_get_busid_by_adapter(adapter));
2230 zfcp_fsf_req_free(fsf_req);
2231 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2232 lock_flags);
2233 goto out;
2234 }
2235
2236 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2237 zfcp_get_busid_by_adapter(adapter));
2238
2239 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2240 lock_flags);
2241
2242 wait_event(fsf_req->completion_wq,
2243 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2244 del_timer_sync(timer);
2245 zfcp_fsf_req_free(fsf_req);
2246 out:
2247 kfree(timer);
2248 return retval;
2249 }
2250
2251
2252 /**
2253 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2254 * @fsf_req: pointer to struct zfcp_fsf_req
2255 */
2256 static void
2257 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2258 {
2259 struct fsf_qtcb_bottom_port *bottom;
2260 struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
2261
2262 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2263 return;
2264
2265 switch (fsf_req->qtcb->header.fsf_status) {
2266 case FSF_GOOD:
2267 bottom = &fsf_req->qtcb->bottom.port;
2268 memcpy(data, bottom, sizeof(*data));
2269 break;
2270
2271 default:
2272 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2273 debug_event(fsf_req->adapter->erp_dbf, 0,
2274 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2275 }
2276 }
2277
2278
2279 /*
2280 * function: zfcp_fsf_open_port
2281 *
2282 * purpose:
2283 *
2284 * returns: address of initiated FSF request
2285 * NULL - request could not be initiated
2286 */
2287 int
2288 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2289 {
2290 volatile struct qdio_buffer_element *sbale;
2291 unsigned long lock_flags;
2292 int retval = 0;
2293
2294 /* setup new FSF request */
2295 retval = zfcp_fsf_req_create(erp_action->adapter,
2296 FSF_QTCB_OPEN_PORT_WITH_DID,
2297 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2298 erp_action->adapter->pool.fsf_req_erp,
2299 &lock_flags, &(erp_action->fsf_req));
2300 if (retval < 0) {
2301 ZFCP_LOG_INFO("error: Could not create open port request "
2302 "for port 0x%016Lx on adapter %s.\n",
2303 erp_action->port->wwpn,
2304 zfcp_get_busid_by_adapter(erp_action->adapter));
2305 goto out;
2306 }
2307
2308 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2309 erp_action->fsf_req->sbal_curr, 0);
2310 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2311 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2312
2313 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2314 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2315 erp_action->fsf_req->data.open_port.port = erp_action->port;
2316 erp_action->fsf_req->erp_action = erp_action;
2317
2318 /* start QDIO request for this FSF request */
2319 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2320 if (retval) {
2321 ZFCP_LOG_INFO("error: Could not send open port request for "
2322 "port 0x%016Lx on adapter %s.\n",
2323 erp_action->port->wwpn,
2324 zfcp_get_busid_by_adapter(erp_action->adapter));
2325 zfcp_fsf_req_free(erp_action->fsf_req);
2326 erp_action->fsf_req = NULL;
2327 goto out;
2328 }
2329
2330 ZFCP_LOG_DEBUG("open port request initiated "
2331 "(adapter %s, port 0x%016Lx)\n",
2332 zfcp_get_busid_by_adapter(erp_action->adapter),
2333 erp_action->port->wwpn);
2334 out:
2335 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2336 lock_flags);
2337 return retval;
2338 }
2339
2340 /*
2341 * function: zfcp_fsf_open_port_handler
2342 *
2343 * purpose: is called for finished Open Port command
2344 *
2345 * returns:
2346 */
2347 static int
2348 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2349 {
2350 int retval = -EINVAL;
2351 struct zfcp_port *port;
2352 struct fsf_plogi *plogi;
2353 struct fsf_qtcb_header *header;
2354 u16 subtable, rule, counter;
2355
2356 port = fsf_req->data.open_port.port;
2357 header = &fsf_req->qtcb->header;
2358
2359 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2360 /* don't change port status in our bookkeeping */
2361 goto skip_fsfstatus;
2362 }
2363
2364 /* evaluate FSF status in QTCB */
2365 switch (header->fsf_status) {
2366
2367 case FSF_PORT_ALREADY_OPEN:
2368 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2369 "is already open.\n",
2370 port->wwpn, zfcp_get_busid_by_port(port));
2371 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2372 "fsf_s_popen");
2373 /*
2374 * This is a bug, however operation should continue normally
2375 * if it is simply ignored
2376 */
2377 break;
2378
2379 case FSF_ACCESS_DENIED:
2380 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2381 "on adapter %s\n",
2382 port->wwpn, zfcp_get_busid_by_port(port));
2383 for (counter = 0; counter < 2; counter++) {
2384 subtable = header->fsf_status_qual.halfword[counter * 2];
2385 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2386 switch (subtable) {
2387 case FSF_SQ_CFDC_SUBTABLE_OS:
2388 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2389 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2390 case FSF_SQ_CFDC_SUBTABLE_LUN:
2391 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2392 zfcp_act_subtable_type[subtable], rule);
2393 break;
2394 }
2395 }
2396 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2397 zfcp_erp_port_access_denied(port);
2398 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2399 break;
2400
2401 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2402 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2403 "The remote port 0x%016Lx on adapter %s "
2404 "could not be opened. Disabling it.\n",
2405 port->wwpn, zfcp_get_busid_by_port(port));
2406 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2407 "fsf_s_max_ports");
2408 zfcp_erp_port_failed(port);
2409 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2410 break;
2411
2412 case FSF_ADAPTER_STATUS_AVAILABLE:
2413 switch (header->fsf_status_qual.word[0]) {
2414 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2415 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2416 "fsf_sq_ltest");
2417 /* ERP strategy will escalate */
2418 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2419 break;
2420 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2421 /* ERP strategy will escalate */
2422 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2423 "fsf_sq_ulp");
2424 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2425 break;
2426 case FSF_SQ_NO_RETRY_POSSIBLE:
2427 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2428 "adapter %s could not be opened. "
2429 "Disabling it.\n",
2430 port->wwpn,
2431 zfcp_get_busid_by_port(port));
2432 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2433 "fsf_sq_no_retry");
2434 zfcp_erp_port_failed(port);
2435 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2436 break;
2437 default:
2438 ZFCP_LOG_NORMAL
2439 ("bug: Wrong status qualifier 0x%x arrived.\n",
2440 header->fsf_status_qual.word[0]);
2441 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2442 "fsf_sq_inval:");
2443 debug_exception(
2444 fsf_req->adapter->erp_dbf, 0,
2445 &header->fsf_status_qual.word[0],
2446 sizeof (u32));
2447 break;
2448 }
2449 break;
2450
2451 case FSF_GOOD:
2452 /* save port handle assigned by FSF */
2453 port->handle = header->port_handle;
2454 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2455 "was opened, it's port handle is 0x%x\n",
2456 port->wwpn, zfcp_get_busid_by_port(port),
2457 port->handle);
2458 /* mark port as open */
2459 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2460 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2461 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2462 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2463 &port->status);
2464 retval = 0;
2465 /* check whether D_ID has changed during open */
2466 /*
2467 * FIXME: This check is not airtight, as the FCP channel does
2468 * not monitor closures of target port connections caused on
2469 * the remote side. Thus, they might miss out on invalidating
2470 * locally cached WWPNs (and other N_Port parameters) of gone
2471 * target ports. So, our heroic attempt to make things safe
2472 * could be undermined by 'open port' response data tagged with
2473 * obsolete WWPNs. Another reason to monitor potential
2474 * connection closures ourself at least (by interpreting
2475 * incoming ELS' and unsolicited status). It just crosses my
2476 * mind that one should be able to cross-check by means of
2477 * another GID_PN straight after a port has been opened.
2478 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2479 */
2480 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2481 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2482 {
2483 if (fsf_req->qtcb->bottom.support.els1_length <
2484 ((((unsigned long) &plogi->serv_param.wwpn) -
2485 ((unsigned long) plogi)) + sizeof (u64))) {
2486 ZFCP_LOG_INFO(
2487 "warning: insufficient length of "
2488 "PLOGI payload (%i)\n",
2489 fsf_req->qtcb->bottom.support.els1_length);
2490 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2491 "fsf_s_short_plogi:");
2492 /* skip sanity check and assume wwpn is ok */
2493 } else {
2494 if (plogi->serv_param.wwpn != port->wwpn) {
2495 ZFCP_LOG_INFO("warning: d_id of port "
2496 "0x%016Lx changed during "
2497 "open\n", port->wwpn);
2498 debug_text_event(
2499 fsf_req->adapter->erp_dbf, 0,
2500 "fsf_s_did_change:");
2501 atomic_clear_mask(
2502 ZFCP_STATUS_PORT_DID_DID,
2503 &port->status);
2504 } else
2505 port->wwnn = plogi->serv_param.wwnn;
2506 }
2507 }
2508 break;
2509
2510 case FSF_UNKNOWN_OP_SUBTYPE:
2511 /* should never occure, subtype not set in zfcp_fsf_open_port */
2512 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2513 "op_subtype=0x%x)\n",
2514 zfcp_get_busid_by_port(port),
2515 fsf_req->qtcb->bottom.support.operation_subtype);
2516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2517 break;
2518
2519 default:
2520 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2521 "(debug info 0x%x)\n",
2522 header->fsf_status);
2523 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2524 debug_exception(fsf_req->adapter->erp_dbf, 0,
2525 &header->fsf_status, sizeof (u32));
2526 break;
2527 }
2528
2529 skip_fsfstatus:
2530 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2531 return retval;
2532 }
2533
2534 /*
2535 * function: zfcp_fsf_close_port
2536 *
2537 * purpose: submit FSF command "close port"
2538 *
2539 * returns: address of initiated FSF request
2540 * NULL - request could not be initiated
2541 */
2542 int
2543 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2544 {
2545 volatile struct qdio_buffer_element *sbale;
2546 unsigned long lock_flags;
2547 int retval = 0;
2548
2549 /* setup new FSF request */
2550 retval = zfcp_fsf_req_create(erp_action->adapter,
2551 FSF_QTCB_CLOSE_PORT,
2552 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2553 erp_action->adapter->pool.fsf_req_erp,
2554 &lock_flags, &(erp_action->fsf_req));
2555 if (retval < 0) {
2556 ZFCP_LOG_INFO("error: Could not create a close port request "
2557 "for port 0x%016Lx on adapter %s.\n",
2558 erp_action->port->wwpn,
2559 zfcp_get_busid_by_adapter(erp_action->adapter));
2560 goto out;
2561 }
2562
2563 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2564 erp_action->fsf_req->sbal_curr, 0);
2565 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2566 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2567
2568 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2569 erp_action->fsf_req->data.close_port.port = erp_action->port;
2570 erp_action->fsf_req->erp_action = erp_action;
2571 erp_action->fsf_req->qtcb->header.port_handle =
2572 erp_action->port->handle;
2573
2574 /* start QDIO request for this FSF request */
2575 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2576 if (retval) {
2577 ZFCP_LOG_INFO("error: Could not send a close port request for "
2578 "port 0x%016Lx on adapter %s.\n",
2579 erp_action->port->wwpn,
2580 zfcp_get_busid_by_adapter(erp_action->adapter));
2581 zfcp_fsf_req_free(erp_action->fsf_req);
2582 erp_action->fsf_req = NULL;
2583 goto out;
2584 }
2585
2586 ZFCP_LOG_TRACE("close port request initiated "
2587 "(adapter %s, port 0x%016Lx)\n",
2588 zfcp_get_busid_by_adapter(erp_action->adapter),
2589 erp_action->port->wwpn);
2590 out:
2591 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2592 lock_flags);
2593 return retval;
2594 }
2595
2596 /*
2597 * function: zfcp_fsf_close_port_handler
2598 *
2599 * purpose: is called for finished Close Port FSF command
2600 *
2601 * returns:
2602 */
2603 static int
2604 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2605 {
2606 int retval = -EINVAL;
2607 struct zfcp_port *port;
2608
2609 port = fsf_req->data.close_port.port;
2610
2611 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2612 /* don't change port status in our bookkeeping */
2613 goto skip_fsfstatus;
2614 }
2615
2616 /* evaluate FSF status in QTCB */
2617 switch (fsf_req->qtcb->header.fsf_status) {
2618
2619 case FSF_PORT_HANDLE_NOT_VALID:
2620 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2621 "0x%016Lx on adapter %s invalid. This may happen "
2622 "occasionally.\n", port->handle,
2623 port->wwpn, zfcp_get_busid_by_port(port));
2624 ZFCP_LOG_DEBUG("status qualifier:\n");
2625 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2626 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2627 sizeof (union fsf_status_qual));
2628 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2629 "fsf_s_phand_nv");
2630 zfcp_erp_adapter_reopen(port->adapter, 0);
2631 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2632 break;
2633
2634 case FSF_ADAPTER_STATUS_AVAILABLE:
2635 /* Note: FSF has actually closed the port in this case.
2636 * The status code is just daft. Fingers crossed for a change
2637 */
2638 retval = 0;
2639 break;
2640
2641 case FSF_GOOD:
2642 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2643 "port handle 0x%x\n", port->wwpn,
2644 zfcp_get_busid_by_port(port), port->handle);
2645 zfcp_erp_modify_port_status(port,
2646 ZFCP_STATUS_COMMON_OPEN,
2647 ZFCP_CLEAR);
2648 retval = 0;
2649 break;
2650
2651 default:
2652 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2653 "(debug info 0x%x)\n",
2654 fsf_req->qtcb->header.fsf_status);
2655 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2656 debug_exception(fsf_req->adapter->erp_dbf, 0,
2657 &fsf_req->qtcb->header.fsf_status,
2658 sizeof (u32));
2659 break;
2660 }
2661
2662 skip_fsfstatus:
2663 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2664 return retval;
2665 }
2666
2667 /*
2668 * function: zfcp_fsf_close_physical_port
2669 *
2670 * purpose: submit FSF command "close physical port"
2671 *
2672 * returns: address of initiated FSF request
2673 * NULL - request could not be initiated
2674 */
2675 int
2676 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2677 {
2678 int retval = 0;
2679 unsigned long lock_flags;
2680 volatile struct qdio_buffer_element *sbale;
2681
2682 /* setup new FSF request */
2683 retval = zfcp_fsf_req_create(erp_action->adapter,
2684 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2685 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2686 erp_action->adapter->pool.fsf_req_erp,
2687 &lock_flags, &erp_action->fsf_req);
2688 if (retval < 0) {
2689 ZFCP_LOG_INFO("error: Could not create close physical port "
2690 "request (adapter %s, port 0x%016Lx)\n",
2691 zfcp_get_busid_by_adapter(erp_action->adapter),
2692 erp_action->port->wwpn);
2693
2694 goto out;
2695 }
2696
2697 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2698 erp_action->fsf_req->sbal_curr, 0);
2699 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2700 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2701
2702 /* mark port as being closed */
2703 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2704 &erp_action->port->status);
2705 /* save a pointer to this port */
2706 erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
2707 /* port to be closeed */
2708 erp_action->fsf_req->qtcb->header.port_handle =
2709 erp_action->port->handle;
2710 erp_action->fsf_req->erp_action = erp_action;
2711
2712 /* start QDIO request for this FSF request */
2713 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2714 if (retval) {
2715 ZFCP_LOG_INFO("error: Could not send close physical port "
2716 "request (adapter %s, port 0x%016Lx)\n",
2717 zfcp_get_busid_by_adapter(erp_action->adapter),
2718 erp_action->port->wwpn);
2719 zfcp_fsf_req_free(erp_action->fsf_req);
2720 erp_action->fsf_req = NULL;
2721 goto out;
2722 }
2723
2724 ZFCP_LOG_TRACE("close physical port request initiated "
2725 "(adapter %s, port 0x%016Lx)\n",
2726 zfcp_get_busid_by_adapter(erp_action->adapter),
2727 erp_action->port->wwpn);
2728 out:
2729 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2730 lock_flags);
2731 return retval;
2732 }
2733
2734 /*
2735 * function: zfcp_fsf_close_physical_port_handler
2736 *
2737 * purpose: is called for finished Close Physical Port FSF command
2738 *
2739 * returns:
2740 */
2741 static int
2742 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2743 {
2744 int retval = -EINVAL;
2745 struct zfcp_port *port;
2746 struct zfcp_unit *unit;
2747 struct fsf_qtcb_header *header;
2748 u16 subtable, rule, counter;
2749
2750 port = fsf_req->data.close_physical_port.port;
2751 header = &fsf_req->qtcb->header;
2752
2753 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2754 /* don't change port status in our bookkeeping */
2755 goto skip_fsfstatus;
2756 }
2757
2758 /* evaluate FSF status in QTCB */
2759 switch (header->fsf_status) {
2760
2761 case FSF_PORT_HANDLE_NOT_VALID:
2762 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2763 "(adapter %s, port 0x%016Lx). "
2764 "This may happen occasionally.\n",
2765 port->handle,
2766 zfcp_get_busid_by_port(port),
2767 port->wwpn);
2768 ZFCP_LOG_DEBUG("status qualifier:\n");
2769 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2770 (char *) &header->fsf_status_qual,
2771 sizeof (union fsf_status_qual));
2772 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2773 "fsf_s_phand_nv");
2774 zfcp_erp_adapter_reopen(port->adapter, 0);
2775 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2776 break;
2777
2778 case FSF_ACCESS_DENIED:
2779 ZFCP_LOG_NORMAL("Access denied, cannot close "
2780 "physical port 0x%016Lx on adapter %s\n",
2781 port->wwpn, zfcp_get_busid_by_port(port));
2782 for (counter = 0; counter < 2; counter++) {
2783 subtable = header->fsf_status_qual.halfword[counter * 2];
2784 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2785 switch (subtable) {
2786 case FSF_SQ_CFDC_SUBTABLE_OS:
2787 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2788 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2789 case FSF_SQ_CFDC_SUBTABLE_LUN:
2790 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2791 zfcp_act_subtable_type[subtable], rule);
2792 break;
2793 }
2794 }
2795 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2796 zfcp_erp_port_access_denied(port);
2797 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2798 break;
2799
2800 case FSF_PORT_BOXED:
2801 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2802 "%s needs to be reopened but it was attempted "
2803 "to close it physically.\n",
2804 port->wwpn,
2805 zfcp_get_busid_by_port(port));
2806 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2807 zfcp_erp_port_boxed(port);
2808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2809 ZFCP_STATUS_FSFREQ_RETRY;
2810 break;
2811
2812 case FSF_ADAPTER_STATUS_AVAILABLE:
2813 switch (header->fsf_status_qual.word[0]) {
2814 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2815 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2816 "fsf_sq_ltest");
2817 /* This will now be escalated by ERP */
2818 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2819 break;
2820 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2821 /* ERP strategy will escalate */
2822 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2823 "fsf_sq_ulp");
2824 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2825 break;
2826 default:
2827 ZFCP_LOG_NORMAL
2828 ("bug: Wrong status qualifier 0x%x arrived.\n",
2829 header->fsf_status_qual.word[0]);
2830 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2831 "fsf_sq_inval:");
2832 debug_exception(
2833 fsf_req->adapter->erp_dbf, 0,
2834 &header->fsf_status_qual.word[0], sizeof (u32));
2835 break;
2836 }
2837 break;
2838
2839 case FSF_GOOD:
2840 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2841 "physically closed, port handle 0x%x\n",
2842 port->wwpn,
2843 zfcp_get_busid_by_port(port), port->handle);
2844 /* can't use generic zfcp_erp_modify_port_status because
2845 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2846 */
2847 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2848 list_for_each_entry(unit, &port->unit_list_head, list)
2849 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2850 retval = 0;
2851 break;
2852
2853 default:
2854 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2855 "(debug info 0x%x)\n",
2856 header->fsf_status);
2857 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2858 debug_exception(fsf_req->adapter->erp_dbf, 0,
2859 &header->fsf_status, sizeof (u32));
2860 break;
2861 }
2862
2863 skip_fsfstatus:
2864 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2865 return retval;
2866 }
2867
2868 /*
2869 * function: zfcp_fsf_open_unit
2870 *
2871 * purpose:
2872 *
2873 * returns:
2874 *
2875 * assumptions: This routine does not check whether the associated
2876 * remote port has already been opened. This should be
2877 * done by calling routines. Otherwise some status
2878 * may be presented by FSF
2879 */
2880 int
2881 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2882 {
2883 volatile struct qdio_buffer_element *sbale;
2884 unsigned long lock_flags;
2885 int retval = 0;
2886
2887 /* setup new FSF request */
2888 retval = zfcp_fsf_req_create(erp_action->adapter,
2889 FSF_QTCB_OPEN_LUN,
2890 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2891 erp_action->adapter->pool.fsf_req_erp,
2892 &lock_flags, &(erp_action->fsf_req));
2893 if (retval < 0) {
2894 ZFCP_LOG_INFO("error: Could not create open unit request for "
2895 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2896 erp_action->unit->fcp_lun,
2897 erp_action->unit->port->wwpn,
2898 zfcp_get_busid_by_adapter(erp_action->adapter));
2899 goto out;
2900 }
2901
2902 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2903 erp_action->fsf_req->sbal_curr, 0);
2904 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2905 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2906
2907 erp_action->fsf_req->qtcb->header.port_handle =
2908 erp_action->port->handle;
2909 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
2910 erp_action->unit->fcp_lun;
2911 erp_action->fsf_req->qtcb->bottom.support.option =
2912 FSF_OPEN_LUN_SUPPRESS_BOXING;
2913 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2914 erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
2915 erp_action->fsf_req->erp_action = erp_action;
2916
2917 /* start QDIO request for this FSF request */
2918 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2919 if (retval) {
2920 ZFCP_LOG_INFO("error: Could not send an open unit request "
2921 "on the adapter %s, port 0x%016Lx for "
2922 "unit 0x%016Lx\n",
2923 zfcp_get_busid_by_adapter(erp_action->adapter),
2924 erp_action->port->wwpn,
2925 erp_action->unit->fcp_lun);
2926 zfcp_fsf_req_free(erp_action->fsf_req);
2927 erp_action->fsf_req = NULL;
2928 goto out;
2929 }
2930
2931 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2932 "port 0x%016Lx, unit 0x%016Lx)\n",
2933 zfcp_get_busid_by_adapter(erp_action->adapter),
2934 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2935 out:
2936 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2937 lock_flags);
2938 return retval;
2939 }
2940
2941 /*
2942 * function: zfcp_fsf_open_unit_handler
2943 *
2944 * purpose: is called for finished Open LUN command
2945 *
2946 * returns:
2947 */
2948 static int
2949 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2950 {
2951 int retval = -EINVAL;
2952 struct zfcp_adapter *adapter;
2953 struct zfcp_unit *unit;
2954 struct fsf_qtcb_header *header;
2955 struct fsf_qtcb_bottom_support *bottom;
2956 struct fsf_queue_designator *queue_designator;
2957 u16 subtable, rule, counter;
2958 u32 allowed, exclusive, readwrite;
2959
2960 unit = fsf_req->data.open_unit.unit;
2961
2962 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2963 /* don't change unit status in our bookkeeping */
2964 goto skip_fsfstatus;
2965 }
2966
2967 adapter = fsf_req->adapter;
2968 header = &fsf_req->qtcb->header;
2969 bottom = &fsf_req->qtcb->bottom.support;
2970 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2971
2972 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
2973 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
2974 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
2975
2976 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2977 ZFCP_STATUS_UNIT_SHARED |
2978 ZFCP_STATUS_UNIT_READONLY,
2979 &unit->status);
2980
2981 /* evaluate FSF status in QTCB */
2982 switch (header->fsf_status) {
2983
2984 case FSF_PORT_HANDLE_NOT_VALID:
2985 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
2986 "for port 0x%016Lx on adapter %s invalid "
2987 "This may happen occasionally\n",
2988 unit->port->handle,
2989 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
2990 ZFCP_LOG_DEBUG("status qualifier:\n");
2991 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2992 (char *) &header->fsf_status_qual,
2993 sizeof (union fsf_status_qual));
2994 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
2995 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
2996 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2997 break;
2998
2999 case FSF_LUN_ALREADY_OPEN:
3000 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3001 "remote port 0x%016Lx on adapter %s twice.\n",
3002 unit->fcp_lun,
3003 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3004 debug_text_exception(adapter->erp_dbf, 0,
3005 "fsf_s_uopen");
3006 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3007 break;
3008
3009 case FSF_ACCESS_DENIED:
3010 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3011 "remote port 0x%016Lx on adapter %s\n",
3012 unit->fcp_lun, unit->port->wwpn,
3013 zfcp_get_busid_by_unit(unit));
3014 for (counter = 0; counter < 2; counter++) {
3015 subtable = header->fsf_status_qual.halfword[counter * 2];
3016 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3017 switch (subtable) {
3018 case FSF_SQ_CFDC_SUBTABLE_OS:
3019 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3020 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3021 case FSF_SQ_CFDC_SUBTABLE_LUN:
3022 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3023 zfcp_act_subtable_type[subtable], rule);
3024 break;
3025 }
3026 }
3027 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3028 zfcp_erp_unit_access_denied(unit);
3029 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3030 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3031 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3032 break;
3033
3034 case FSF_PORT_BOXED:
3035 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3036 "needs to be reopened\n",
3037 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3038 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3039 zfcp_erp_port_boxed(unit->port);
3040 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3041 ZFCP_STATUS_FSFREQ_RETRY;
3042 break;
3043
3044 case FSF_LUN_SHARING_VIOLATION:
3045 if (header->fsf_status_qual.word[0] != 0) {
3046 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3047 "with WWPN 0x%Lx "
3048 "connected to the adapter %s "
3049 "is already in use in LPAR%d, CSS%d\n",
3050 unit->fcp_lun,
3051 unit->port->wwpn,
3052 zfcp_get_busid_by_unit(unit),
3053 queue_designator->hla,
3054 queue_designator->cssid);
3055 } else {
3056 subtable = header->fsf_status_qual.halfword[4];
3057 rule = header->fsf_status_qual.halfword[5];
3058 switch (subtable) {
3059 case FSF_SQ_CFDC_SUBTABLE_OS:
3060 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3061 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3062 case FSF_SQ_CFDC_SUBTABLE_LUN:
3063 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3064 "remote port with WWPN 0x%Lx "
3065 "connected to the adapter %s "
3066 "is denied (%s rule %d)\n",
3067 unit->fcp_lun,
3068 unit->port->wwpn,
3069 zfcp_get_busid_by_unit(unit),
3070 zfcp_act_subtable_type[subtable],
3071 rule);
3072 break;
3073 }
3074 }
3075 ZFCP_LOG_DEBUG("status qualifier:\n");
3076 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3077 (char *) &header->fsf_status_qual,
3078 sizeof (union fsf_status_qual));
3079 debug_text_event(adapter->erp_dbf, 2,
3080 "fsf_s_l_sh_vio");
3081 zfcp_erp_unit_access_denied(unit);
3082 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3083 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3084 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3085 break;
3086
3087 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3088 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3089 "There is no handle (temporary port identifier) "
3090 "available for unit 0x%016Lx on port 0x%016Lx "
3091 "on adapter %s\n",
3092 unit->fcp_lun,
3093 unit->port->wwpn,
3094 zfcp_get_busid_by_unit(unit));
3095 debug_text_event(adapter->erp_dbf, 1,
3096 "fsf_s_max_units");
3097 zfcp_erp_unit_failed(unit);
3098 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3099 break;
3100
3101 case FSF_ADAPTER_STATUS_AVAILABLE:
3102 switch (header->fsf_status_qual.word[0]) {
3103 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3104 /* Re-establish link to port */
3105 debug_text_event(adapter->erp_dbf, 1,
3106 "fsf_sq_ltest");
3107 zfcp_test_link(unit->port);
3108 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3109 break;
3110 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3111 /* ERP strategy will escalate */
3112 debug_text_event(adapter->erp_dbf, 1,
3113 "fsf_sq_ulp");
3114 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3115 break;
3116 default:
3117 ZFCP_LOG_NORMAL
3118 ("bug: Wrong status qualifier 0x%x arrived.\n",
3119 header->fsf_status_qual.word[0]);
3120 debug_text_event(adapter->erp_dbf, 0,
3121 "fsf_sq_inval:");
3122 debug_exception(adapter->erp_dbf, 0,
3123 &header->fsf_status_qual.word[0],
3124 sizeof (u32));
3125 }
3126 break;
3127
3128 case FSF_INVALID_COMMAND_OPTION:
3129 ZFCP_LOG_NORMAL(
3130 "Invalid option 0x%x has been specified "
3131 "in QTCB bottom sent to the adapter %s\n",
3132 bottom->option,
3133 zfcp_get_busid_by_adapter(adapter));
3134 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3135 retval = -EINVAL;
3136 break;
3137
3138 case FSF_GOOD:
3139 /* save LUN handle assigned by FSF */
3140 unit->handle = header->lun_handle;
3141 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3142 "adapter %s opened, port handle 0x%x\n",
3143 unit->fcp_lun,
3144 unit->port->wwpn,
3145 zfcp_get_busid_by_unit(unit),
3146 unit->handle);
3147 /* mark unit as open */
3148 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3149 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3150 ZFCP_STATUS_COMMON_ACCESS_BOXED,
3151 &unit->status);
3152 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3153 if (!exclusive)
3154 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3155 &unit->status);
3156
3157 if (!readwrite) {
3158 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3159 &unit->status);
3160 ZFCP_LOG_NORMAL("read-only access for unit "
3161 "(adapter %s, wwpn=0x%016Lx, "
3162 "fcp_lun=0x%016Lx)\n",
3163 zfcp_get_busid_by_unit(unit),
3164 unit->port->wwpn,
3165 unit->fcp_lun);
3166 }
3167
3168 if (exclusive && !readwrite) {
3169 ZFCP_LOG_NORMAL("exclusive access of read-only "
3170 "unit not supported\n");
3171 zfcp_erp_unit_failed(unit);
3172 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3173 zfcp_erp_unit_shutdown(unit, 0);
3174 } else if (!exclusive && readwrite) {
3175 ZFCP_LOG_NORMAL("shared access of read-write "
3176 "unit not supported\n");
3177 zfcp_erp_unit_failed(unit);
3178 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3179 zfcp_erp_unit_shutdown(unit, 0);
3180 }
3181 }
3182
3183 retval = 0;
3184 break;
3185
3186 default:
3187 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3188 "(debug info 0x%x)\n",
3189 header->fsf_status);
3190 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3191 debug_exception(adapter->erp_dbf, 0,
3192 &header->fsf_status, sizeof (u32));
3193 break;
3194 }
3195
3196 skip_fsfstatus:
3197 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3198 return retval;
3199 }
3200
3201 /*
3202 * function: zfcp_fsf_close_unit
3203 *
3204 * purpose:
3205 *
3206 * returns: address of fsf_req - request successfully initiated
3207 * NULL -
3208 *
3209 * assumptions: This routine does not check whether the associated
3210 * remote port/lun has already been opened. This should be
3211 * done by calling routines. Otherwise some status
3212 * may be presented by FSF
3213 */
3214 int
3215 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3216 {
3217 volatile struct qdio_buffer_element *sbale;
3218 unsigned long lock_flags;
3219 int retval = 0;
3220
3221 /* setup new FSF request */
3222 retval = zfcp_fsf_req_create(erp_action->adapter,
3223 FSF_QTCB_CLOSE_LUN,
3224 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3225 erp_action->adapter->pool.fsf_req_erp,
3226 &lock_flags, &(erp_action->fsf_req));
3227 if (retval < 0) {
3228 ZFCP_LOG_INFO("error: Could not create close unit request for "
3229 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3230 erp_action->unit->fcp_lun,
3231 erp_action->port->wwpn,
3232 zfcp_get_busid_by_adapter(erp_action->adapter));
3233 goto out;
3234 }
3235
3236 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3237 erp_action->fsf_req->sbal_curr, 0);
3238 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3239 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3240
3241 erp_action->fsf_req->qtcb->header.port_handle =
3242 erp_action->port->handle;
3243 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3244 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3245 erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
3246 erp_action->fsf_req->erp_action = erp_action;
3247
3248 /* start QDIO request for this FSF request */
3249 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3250 if (retval) {
3251 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3252 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3253 erp_action->unit->fcp_lun,
3254 erp_action->port->wwpn,
3255 zfcp_get_busid_by_adapter(erp_action->adapter));
3256 zfcp_fsf_req_free(erp_action->fsf_req);
3257 erp_action->fsf_req = NULL;
3258 goto out;
3259 }
3260
3261 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3262 "port 0x%016Lx, unit 0x%016Lx)\n",
3263 zfcp_get_busid_by_adapter(erp_action->adapter),
3264 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3265 out:
3266 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3267 lock_flags);
3268 return retval;
3269 }
3270
3271 /*
3272 * function: zfcp_fsf_close_unit_handler
3273 *
3274 * purpose: is called for finished Close LUN FSF command
3275 *
3276 * returns:
3277 */
3278 static int
3279 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3280 {
3281 int retval = -EINVAL;
3282 struct zfcp_unit *unit;
3283
3284 unit = fsf_req->data.close_unit.unit; /* restore unit */
3285
3286 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3287 /* don't change unit status in our bookkeeping */
3288 goto skip_fsfstatus;
3289 }
3290
3291 /* evaluate FSF status in QTCB */
3292 switch (fsf_req->qtcb->header.fsf_status) {
3293
3294 case FSF_PORT_HANDLE_NOT_VALID:
3295 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3296 "0x%016Lx on adapter %s invalid. This may "
3297 "happen in rare circumstances\n",
3298 unit->port->handle,
3299 unit->port->wwpn,
3300 zfcp_get_busid_by_unit(unit));
3301 ZFCP_LOG_DEBUG("status qualifier:\n");
3302 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3303 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3304 sizeof (union fsf_status_qual));
3305 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3306 "fsf_s_phand_nv");
3307 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3308 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3309 &fsf_req->qtcb->header.fsf_status_qual,
3310 sizeof (union fsf_status_qual));
3311 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3312 break;
3313
3314 case FSF_LUN_HANDLE_NOT_VALID:
3315 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3316 "0x%016Lx on port 0x%016Lx on adapter %s is "
3317 "invalid. This may happen occasionally.\n",
3318 unit->handle,
3319 unit->fcp_lun,
3320 unit->port->wwpn,
3321 zfcp_get_busid_by_unit(unit));
3322 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3323 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3324 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3325 sizeof (union fsf_status_qual));
3326 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3327 "fsf_s_lhand_nv");
3328 zfcp_erp_port_reopen(unit->port, 0);
3329 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3330 &fsf_req->qtcb->header.fsf_status_qual,
3331 sizeof (union fsf_status_qual));
3332 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3333 break;
3334
3335 case FSF_PORT_BOXED:
3336 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3337 "needs to be reopened\n",
3338 unit->port->wwpn,
3339 zfcp_get_busid_by_unit(unit));
3340 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3341 zfcp_erp_port_boxed(unit->port);
3342 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3343 ZFCP_STATUS_FSFREQ_RETRY;
3344 break;
3345
3346 case FSF_ADAPTER_STATUS_AVAILABLE:
3347 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3348 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3349 /* re-establish link to port */
3350 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3351 "fsf_sq_ltest");
3352 zfcp_test_link(unit->port);
3353 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3354 break;
3355 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3356 /* ERP strategy will escalate */
3357 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3358 "fsf_sq_ulp");
3359 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3360 break;
3361 default:
3362 ZFCP_LOG_NORMAL
3363 ("bug: Wrong status qualifier 0x%x arrived.\n",
3364 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3365 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3366 "fsf_sq_inval:");
3367 debug_exception(
3368 fsf_req->adapter->erp_dbf, 0,
3369 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3370 sizeof (u32));
3371 break;
3372 }
3373 break;
3374
3375 case FSF_GOOD:
3376 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3377 "closed, port handle 0x%x\n",
3378 unit->fcp_lun,
3379 unit->port->wwpn,
3380 zfcp_get_busid_by_unit(unit),
3381 unit->handle);
3382 /* mark unit as closed */
3383 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3384 retval = 0;
3385 break;
3386
3387 default:
3388 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3389 "(debug info 0x%x)\n",
3390 fsf_req->qtcb->header.fsf_status);
3391 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3392 debug_exception(fsf_req->adapter->erp_dbf, 0,
3393 &fsf_req->qtcb->header.fsf_status,
3394 sizeof (u32));
3395 break;
3396 }
3397
3398 skip_fsfstatus:
3399 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3400 return retval;
3401 }
3402
3403 /**
3404 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3405 * @adapter: adapter where scsi command is issued
3406 * @unit: unit where command is sent to
3407 * @scsi_cmnd: scsi command to be sent
3408 * @timer: timer to be started when request is initiated
3409 * @req_flags: flags for fsf_request
3410 */
3411 int
3412 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3413 struct zfcp_unit *unit,
3414 struct scsi_cmnd * scsi_cmnd,
3415 struct timer_list *timer, int req_flags)
3416 {
3417 struct zfcp_fsf_req *fsf_req = NULL;
3418 struct fcp_cmnd_iu *fcp_cmnd_iu;
3419 unsigned int sbtype;
3420 unsigned long lock_flags;
3421 int real_bytes = 0;
3422 int retval = 0;
3423 int mask;
3424
3425 /* setup new FSF request */
3426 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3427 adapter->pool.fsf_req_scsi,
3428 &lock_flags, &fsf_req);
3429 if (unlikely(retval < 0)) {
3430 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3431 "for unit 0x%016Lx on port 0x%016Lx on "
3432 "adapter %s\n",
3433 unit->fcp_lun,
3434 unit->port->wwpn,
3435 zfcp_get_busid_by_adapter(adapter));
3436 goto failed_req_create;
3437 }
3438
3439 /*
3440 * associate FSF request with SCSI request
3441 * (need this for look up on abort)
3442 */
3443 fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
3444 scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
3445
3446 /*
3447 * associate SCSI command with FSF request
3448 * (need this for look up on normal command completion)
3449 */
3450 fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
3451 fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
3452 fsf_req->data.send_fcp_command_task.unit = unit;
3453 ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
3454
3455 /* set handles of unit and its parent port in QTCB */
3456 fsf_req->qtcb->header.lun_handle = unit->handle;
3457 fsf_req->qtcb->header.port_handle = unit->port->handle;
3458
3459 /* FSF does not define the structure of the FCP_CMND IU */
3460 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3461 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3462
3463 /*
3464 * set depending on data direction:
3465 * data direction bits in SBALE (SB Type)
3466 * data direction bits in QTCB
3467 * data direction bits in FCP_CMND IU
3468 */
3469 switch (scsi_cmnd->sc_data_direction) {
3470 case DMA_NONE:
3471 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3472 /*
3473 * FIXME(qdio):
3474 * what is the correct type for commands
3475 * without 'real' data buffers?
3476 */
3477 sbtype = SBAL_FLAGS0_TYPE_READ;
3478 break;
3479 case DMA_FROM_DEVICE:
3480 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3481 sbtype = SBAL_FLAGS0_TYPE_READ;
3482 fcp_cmnd_iu->rddata = 1;
3483 break;
3484 case DMA_TO_DEVICE:
3485 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3486 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3487 fcp_cmnd_iu->wddata = 1;
3488 break;
3489 case DMA_BIDIRECTIONAL:
3490 default:
3491 /*
3492 * dummy, catch this condition earlier
3493 * in zfcp_scsi_queuecommand
3494 */
3495 goto failed_scsi_cmnd;
3496 }
3497
3498 /* set FC service class in QTCB (3 per default) */
3499 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3500
3501 /* set FCP_LUN in FCP_CMND IU in QTCB */
3502 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3503
3504 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3505
3506 /* set task attributes in FCP_CMND IU in QTCB */
3507 if (likely((scsi_cmnd->device->simple_tags) ||
3508 (atomic_test_mask(mask, &unit->status))))
3509 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3510 else
3511 fcp_cmnd_iu->task_attribute = UNTAGGED;
3512
3513 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3514 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3515 fcp_cmnd_iu->add_fcp_cdb_length
3516 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3517 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3518 "additional FCP_CDB length is 0x%x "
3519 "(shifted right 2 bits)\n",
3520 scsi_cmnd->cmd_len,
3521 fcp_cmnd_iu->add_fcp_cdb_length);
3522 }
3523 /*
3524 * copy SCSI CDB (including additional length, if any) to
3525 * FCP_CDB in FCP_CMND IU in QTCB
3526 */
3527 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3528
3529 /* FCP CMND IU length in QTCB */
3530 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3531 sizeof (struct fcp_cmnd_iu) +
3532 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3533
3534 /* generate SBALEs from data buffer */
3535 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3536 if (unlikely(real_bytes < 0)) {
3537 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3538 ZFCP_LOG_DEBUG(
3539 "Data did not fit into available buffer(s), "
3540 "waiting for more...\n");
3541 retval = -EIO;
3542 } else {
3543 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3544 "required. Shutting down unit "
3545 "(adapter %s, port 0x%016Lx, "
3546 "unit 0x%016Lx)\n",
3547 zfcp_get_busid_by_unit(unit),
3548 unit->port->wwpn,
3549 unit->fcp_lun);
3550 zfcp_erp_unit_shutdown(unit, 0);
3551 retval = -EINVAL;
3552 }
3553 goto no_fit;
3554 }
3555
3556 /* set length of FCP data length in FCP_CMND IU in QTCB */
3557 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3558
3559 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3560 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3561 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3562
3563 /*
3564 * start QDIO request for this FSF request
3565 * covered by an SBALE)
3566 */
3567 retval = zfcp_fsf_req_send(fsf_req, timer);
3568 if (unlikely(retval < 0)) {
3569 ZFCP_LOG_INFO("error: Could not send FCP command request "
3570 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3571 zfcp_get_busid_by_adapter(adapter),
3572 unit->port->wwpn,
3573 unit->fcp_lun);
3574 goto send_failed;
3575 }
3576
3577 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3578 "port 0x%016Lx, unit 0x%016Lx)\n",
3579 zfcp_get_busid_by_adapter(adapter),
3580 unit->port->wwpn,
3581 unit->fcp_lun);
3582 goto success;
3583
3584 send_failed:
3585 no_fit:
3586 failed_scsi_cmnd:
3587 zfcp_fsf_req_free(fsf_req);
3588 fsf_req = NULL;
3589 scsi_cmnd->host_scribble = NULL;
3590 success:
3591 failed_req_create:
3592 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3593 return retval;
3594 }
3595
3596 /*
3597 * function: zfcp_fsf_send_fcp_command_task_management
3598 *
3599 * purpose:
3600 *
3601 * returns:
3602 *
3603 * FIXME(design): should be watched by a timeout!!!
3604 * FIXME(design) shouldn't this be modified to return an int
3605 * also...don't know how though
3606 *
3607 */
3608 struct zfcp_fsf_req *
3609 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3610 struct zfcp_unit *unit,
3611 u8 tm_flags, int req_flags)
3612 {
3613 struct zfcp_fsf_req *fsf_req = NULL;
3614 int retval = 0;
3615 struct fcp_cmnd_iu *fcp_cmnd_iu;
3616 unsigned long lock_flags;
3617 volatile struct qdio_buffer_element *sbale;
3618
3619 /* setup new FSF request */
3620 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3621 adapter->pool.fsf_req_scsi,
3622 &lock_flags, &fsf_req);
3623 if (retval < 0) {
3624 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3625 "management) request for adapter %s, port "
3626 " 0x%016Lx, unit 0x%016Lx.\n",
3627 zfcp_get_busid_by_adapter(adapter),
3628 unit->port->wwpn, unit->fcp_lun);
3629 goto out;
3630 }
3631
3632 /*
3633 * Used to decide on proper handler in the return path,
3634 * could be either zfcp_fsf_send_fcp_command_task_handler or
3635 * zfcp_fsf_send_fcp_command_task_management_handler */
3636
3637 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3638
3639 /*
3640 * hold a pointer to the unit being target of this
3641 * task management request
3642 */
3643 fsf_req->data.send_fcp_command_task_management.unit = unit;
3644
3645 /* set FSF related fields in QTCB */
3646 fsf_req->qtcb->header.lun_handle = unit->handle;
3647 fsf_req->qtcb->header.port_handle = unit->port->handle;
3648 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3649 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3650 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3651 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3652
3653 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3654 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3655 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3656
3657 /* set FCP related fields in FCP_CMND IU in QTCB */
3658 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3659 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3660 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3661 fcp_cmnd_iu->task_management_flags = tm_flags;
3662
3663 /* start QDIO request for this FSF request */
3664 zfcp_fsf_start_scsi_er_timer(adapter);
3665 retval = zfcp_fsf_req_send(fsf_req, NULL);
3666 if (retval) {
3667 del_timer(&adapter->scsi_er_timer);
3668 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3669 "management) on adapter %s, port 0x%016Lx for "
3670 "unit LUN 0x%016Lx\n",
3671 zfcp_get_busid_by_adapter(adapter),
3672 unit->port->wwpn,
3673 unit->fcp_lun);
3674 zfcp_fsf_req_free(fsf_req);
3675 fsf_req = NULL;
3676 goto out;
3677 }
3678
3679 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3680 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3681 "tm_flags=0x%x)\n",
3682 zfcp_get_busid_by_adapter(adapter),
3683 unit->port->wwpn,
3684 unit->fcp_lun,
3685 tm_flags);
3686 out:
3687 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3688 return fsf_req;
3689 }
3690
3691 /*
3692 * function: zfcp_fsf_send_fcp_command_handler
3693 *
3694 * purpose: is called for finished Send FCP Command
3695 *
3696 * returns:
3697 */
3698 static int
3699 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3700 {
3701 int retval = -EINVAL;
3702 struct zfcp_unit *unit;
3703 struct fsf_qtcb_header *header;
3704 u16 subtable, rule, counter;
3705
3706 header = &fsf_req->qtcb->header;
3707
3708 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3709 unit = fsf_req->data.send_fcp_command_task_management.unit;
3710 else
3711 unit = fsf_req->data.send_fcp_command_task.unit;
3712
3713 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3714 /* go directly to calls of special handlers */
3715 goto skip_fsfstatus;
3716 }
3717
3718 /* evaluate FSF status in QTCB */
3719 switch (header->fsf_status) {
3720
3721 case FSF_PORT_HANDLE_NOT_VALID:
3722 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3723 "0x%016Lx on adapter %s invalid\n",
3724 unit->port->handle,
3725 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3726 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3727 (char *) &header->fsf_status_qual,
3728 sizeof (union fsf_status_qual));
3729 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3730 "fsf_s_phand_nv");
3731 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3732 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3733 break;
3734
3735 case FSF_LUN_HANDLE_NOT_VALID:
3736 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3737 "0x%016Lx on port 0x%016Lx on adapter %s is "
3738 "invalid. This may happen occasionally.\n",
3739 unit->handle,
3740 unit->fcp_lun,
3741 unit->port->wwpn,
3742 zfcp_get_busid_by_unit(unit));
3743 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3744 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3745 (char *) &header->fsf_status_qual,
3746 sizeof (union fsf_status_qual));
3747 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3748 "fsf_s_uhand_nv");
3749 zfcp_erp_port_reopen(unit->port, 0);
3750 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3751 break;
3752
3753 case FSF_HANDLE_MISMATCH:
3754 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3755 "unexpectedly. (adapter %s, port 0x%016Lx, "
3756 "unit 0x%016Lx)\n",
3757 unit->port->handle,
3758 zfcp_get_busid_by_unit(unit),
3759 unit->port->wwpn,
3760 unit->fcp_lun);
3761 ZFCP_LOG_NORMAL("status qualifier:\n");
3762 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3763 (char *) &header->fsf_status_qual,
3764 sizeof (union fsf_status_qual));
3765 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3766 "fsf_s_hand_mis");
3767 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3768 zfcp_cmd_dbf_event_fsf("handmism",
3769 fsf_req,
3770 &header->fsf_status_qual,
3771 sizeof (union fsf_status_qual));
3772 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3773 break;
3774
3775 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3776 if (fsf_req->adapter->fc_service_class <= 3) {
3777 ZFCP_LOG_NORMAL("error: The adapter %s does "
3778 "not support fibrechannel class %d.\n",
3779 zfcp_get_busid_by_unit(unit),
3780 fsf_req->adapter->fc_service_class);
3781 } else {
3782 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3783 "adapter %s is invalid. "
3784 "(debug info %d)\n",
3785 zfcp_get_busid_by_unit(unit),
3786 fsf_req->adapter->fc_service_class);
3787 }
3788 /* stop operation for this adapter */
3789 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3790 "fsf_s_class_nsup");
3791 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3792 zfcp_cmd_dbf_event_fsf("unsclass",
3793 fsf_req,
3794 &header->fsf_status_qual,
3795 sizeof (union fsf_status_qual));
3796 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3797 break;
3798
3799 case FSF_FCPLUN_NOT_VALID:
3800 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3801 "adapter %s does not have correct unit "
3802 "handle 0x%x\n",
3803 unit->fcp_lun,
3804 unit->port->wwpn,
3805 zfcp_get_busid_by_unit(unit),
3806 unit->handle);
3807 ZFCP_LOG_DEBUG("status qualifier:\n");
3808 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3809 (char *) &header->fsf_status_qual,
3810 sizeof (union fsf_status_qual));
3811 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3812 "fsf_s_fcp_lun_nv");
3813 zfcp_erp_port_reopen(unit->port, 0);
3814 zfcp_cmd_dbf_event_fsf("fluninv",
3815 fsf_req,
3816 &header->fsf_status_qual,
3817 sizeof (union fsf_status_qual));
3818 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3819 break;
3820
3821 case FSF_ACCESS_DENIED:
3822 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3823 "unit 0x%016Lx on port 0x%016Lx on "
3824 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3825 zfcp_get_busid_by_unit(unit));
3826 for (counter = 0; counter < 2; counter++) {
3827 subtable = header->fsf_status_qual.halfword[counter * 2];
3828 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3829 switch (subtable) {
3830 case FSF_SQ_CFDC_SUBTABLE_OS:
3831 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3832 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3833 case FSF_SQ_CFDC_SUBTABLE_LUN:
3834 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3835 zfcp_act_subtable_type[subtable], rule);
3836 break;
3837 }
3838 }
3839 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3840 zfcp_erp_unit_access_denied(unit);
3841 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3842 break;
3843
3844 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3845 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3846 "0x%016Lx on port 0x%016Lx on adapter %s "
3847 "(debug info %d)\n",
3848 unit->fcp_lun,
3849 unit->port->wwpn,
3850 zfcp_get_busid_by_unit(unit),
3851 fsf_req->qtcb->bottom.io.data_direction);
3852 /* stop operation for this adapter */
3853 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3854 "fsf_s_dir_ind_nv");
3855 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3856 zfcp_cmd_dbf_event_fsf("dirinv",
3857 fsf_req,
3858 &header->fsf_status_qual,
3859 sizeof (union fsf_status_qual));
3860 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3861 break;
3862
3863 case FSF_CMND_LENGTH_NOT_VALID:
3864 ZFCP_LOG_NORMAL
3865 ("bug: An invalid control-data-block length field "
3866 "was found in a command for unit 0x%016Lx on port "
3867 "0x%016Lx on adapter %s " "(debug info %d)\n",
3868 unit->fcp_lun, unit->port->wwpn,
3869 zfcp_get_busid_by_unit(unit),
3870 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3871 /* stop operation for this adapter */
3872 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3873 "fsf_s_cmd_len_nv");
3874 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3875 zfcp_cmd_dbf_event_fsf("cleninv",
3876 fsf_req,
3877 &header->fsf_status_qual,
3878 sizeof (union fsf_status_qual));
3879 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3880 break;
3881
3882 case FSF_PORT_BOXED:
3883 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3884 "needs to be reopened\n",
3885 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3886 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3887 zfcp_erp_port_boxed(unit->port);
3888 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3889 ZFCP_STATUS_FSFREQ_RETRY;
3890 break;
3891
3892 case FSF_LUN_BOXED:
3893 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3894 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3895 zfcp_get_busid_by_unit(unit),
3896 unit->port->wwpn, unit->fcp_lun);
3897 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
3898 zfcp_erp_unit_boxed(unit);
3899 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3900 | ZFCP_STATUS_FSFREQ_RETRY;
3901 break;
3902
3903 case FSF_ADAPTER_STATUS_AVAILABLE:
3904 switch (header->fsf_status_qual.word[0]) {
3905 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3906 /* re-establish link to port */
3907 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3908 "fsf_sq_ltest");
3909 zfcp_test_link(unit->port);
3910 break;
3911 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3912 /* FIXME(hw) need proper specs for proper action */
3913 /* let scsi stack deal with retries and escalation */
3914 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3915 "fsf_sq_ulp");
3916 break;
3917 default:
3918 ZFCP_LOG_NORMAL
3919 ("Unknown status qualifier 0x%x arrived.\n",
3920 header->fsf_status_qual.word[0]);
3921 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3922 "fsf_sq_inval:");
3923 debug_exception(fsf_req->adapter->erp_dbf, 0,
3924 &header->fsf_status_qual.word[0],
3925 sizeof(u32));
3926 break;
3927 }
3928 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3929 break;
3930
3931 case FSF_GOOD:
3932 break;
3933
3934 case FSF_FCP_RSP_AVAILABLE:
3935 break;
3936
3937 default:
3938 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3939 debug_exception(fsf_req->adapter->erp_dbf, 0,
3940 &header->fsf_status, sizeof(u32));
3941 break;
3942 }
3943
3944 skip_fsfstatus:
3945 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3946 retval =
3947 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3948 } else {
3949 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
3950 }
3951 return retval;
3952 }
3953
3954 /*
3955 * function: zfcp_fsf_send_fcp_command_task_handler
3956 *
3957 * purpose: evaluates FCP_RSP IU
3958 *
3959 * returns:
3960 */
3961 static int
3962 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3963 {
3964 int retval = 0;
3965 struct scsi_cmnd *scpnt;
3966 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3967 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3968 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3969 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3970 u32 sns_len;
3971 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3972 unsigned long flags;
3973 struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit;
3974
3975 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
3976 scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
3977 if (unlikely(!scpnt)) {
3978 ZFCP_LOG_DEBUG
3979 ("Command with fsf_req %p is not associated to "
3980 "a scsi command anymore. Aborted?\n", fsf_req);
3981 goto out;
3982 }
3983 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3984 /* FIXME: (design) mid-layer should handle DID_ABORT like
3985 * DID_SOFT_ERROR by retrying the request for devices
3986 * that allow retries.
3987 */
3988 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
3989 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
3990 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
3991 goto skip_fsfstatus;
3992 }
3993
3994 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3995 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
3996 set_host_byte(&scpnt->result, DID_ERROR);
3997 goto skip_fsfstatus;
3998 }
3999
4000 /* set message byte of result in SCSI command */
4001 scpnt->result |= COMMAND_COMPLETE << 8;
4002
4003 /*
4004 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4005 * of result in SCSI command
4006 */
4007 scpnt->result |= fcp_rsp_iu->scsi_status;
4008 if (unlikely(fcp_rsp_iu->scsi_status)) {
4009 /* DEBUG */
4010 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4011 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4012 scpnt->cmnd, scpnt->cmd_len);
4013 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4014 fcp_rsp_iu->scsi_status);
4015 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4016 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4017 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4018 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4019 fcp_rsp_iu->fcp_sns_len);
4020 }
4021
4022 /* check FCP_RSP_INFO */
4023 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4024 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4025 switch (fcp_rsp_info[3]) {
4026 case RSP_CODE_GOOD:
4027 /* ok, continue */
4028 ZFCP_LOG_TRACE("no failure or Task Management "
4029 "Function complete\n");
4030 set_host_byte(&scpnt->result, DID_OK);
4031 break;
4032 case RSP_CODE_LENGTH_MISMATCH:
4033 /* hardware bug */
4034 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4035 "that the fibrechannel protocol data "
4036 "length differs from the burst length. "
4037 "The problem occured on unit 0x%016Lx "
4038 "on port 0x%016Lx on adapter %s",
4039 unit->fcp_lun,
4040 unit->port->wwpn,
4041 zfcp_get_busid_by_unit(unit));
4042 /* dump SCSI CDB as prepared by zfcp */
4043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4044 (char *) &fsf_req->qtcb->
4045 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4046 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4047 set_host_byte(&scpnt->result, DID_ERROR);
4048 goto skip_fsfstatus;
4049 case RSP_CODE_FIELD_INVALID:
4050 /* driver or hardware bug */
4051 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4052 "that the fibrechannel protocol data "
4053 "fields were incorrectly set up. "
4054 "The problem occured on the unit "
4055 "0x%016Lx on port 0x%016Lx on "
4056 "adapter %s",
4057 unit->fcp_lun,
4058 unit->port->wwpn,
4059 zfcp_get_busid_by_unit(unit));
4060 /* dump SCSI CDB as prepared by zfcp */
4061 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4062 (char *) &fsf_req->qtcb->
4063 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4064 set_host_byte(&scpnt->result, DID_ERROR);
4065 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4066 goto skip_fsfstatus;
4067 case RSP_CODE_RO_MISMATCH:
4068 /* hardware bug */
4069 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4070 "that conflicting values for the "
4071 "fibrechannel payload offset from the "
4072 "header were found. "
4073 "The problem occured on unit 0x%016Lx "
4074 "on port 0x%016Lx on adapter %s.\n",
4075 unit->fcp_lun,
4076 unit->port->wwpn,
4077 zfcp_get_busid_by_unit(unit));
4078 /* dump SCSI CDB as prepared by zfcp */
4079 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4080 (char *) &fsf_req->qtcb->
4081 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4082 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4083 set_host_byte(&scpnt->result, DID_ERROR);
4084 goto skip_fsfstatus;
4085 default:
4086 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4087 "code was detected for a command. "
4088 "The problem occured on the unit "
4089 "0x%016Lx on port 0x%016Lx on "
4090 "adapter %s (debug info 0x%x)\n",
4091 unit->fcp_lun,
4092 unit->port->wwpn,
4093 zfcp_get_busid_by_unit(unit),
4094 fcp_rsp_info[3]);
4095 /* dump SCSI CDB as prepared by zfcp */
4096 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4097 (char *) &fsf_req->qtcb->
4098 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4099 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4100 set_host_byte(&scpnt->result, DID_ERROR);
4101 goto skip_fsfstatus;
4102 }
4103 }
4104
4105 /* check for sense data */
4106 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4107 sns_len = FSF_FCP_RSP_SIZE -
4108 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4109 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4110 sns_len);
4111 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4112 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4113 SCSI_SENSE_BUFFERSIZE);
4114 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4115 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4116 scpnt->result);
4117 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4118 (void *) &scpnt->cmnd, scpnt->cmd_len);
4119
4120 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4121 fcp_rsp_iu->fcp_sns_len);
4122 memcpy(&scpnt->sense_buffer,
4123 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4124 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4125 (void *) &scpnt->sense_buffer, sns_len);
4126 }
4127
4128 /* check for overrun */
4129 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4130 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4131 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4132 "The response data length is "
4133 "%d, the original length was %d.\n",
4134 unit->fcp_lun,
4135 unit->port->wwpn,
4136 zfcp_get_busid_by_unit(unit),
4137 fcp_rsp_iu->fcp_resid,
4138 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4139 }
4140
4141 /* check for underrun */
4142 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4143 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4144 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4145 "The response data length is "
4146 "%d, the original length was %d.\n",
4147 unit->fcp_lun,
4148 unit->port->wwpn,
4149 zfcp_get_busid_by_unit(unit),
4150 fcp_rsp_iu->fcp_resid,
4151 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4152
4153 scpnt->resid = fcp_rsp_iu->fcp_resid;
4154 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4155 set_host_byte(&scpnt->result, DID_ERROR);
4156 }
4157
4158 skip_fsfstatus:
4159 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4160
4161 zfcp_cmd_dbf_event_scsi("response", scpnt);
4162
4163 /* cleanup pointer (need this especially for abort) */
4164 scpnt->host_scribble = NULL;
4165
4166 /*
4167 * NOTE:
4168 * according to the outcome of a discussion on linux-scsi we
4169 * don't need to grab the io_request_lock here since we use
4170 * the new eh
4171 */
4172 /* always call back */
4173
4174 (scpnt->scsi_done) (scpnt);
4175
4176 /*
4177 * We must hold this lock until scsi_done has been called.
4178 * Otherwise we may call scsi_done after abort regarding this
4179 * command has completed.
4180 * Note: scsi_done must not block!
4181 */
4182 out:
4183 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4184 return retval;
4185 }
4186
4187 /*
4188 * function: zfcp_fsf_send_fcp_command_task_management_handler
4189 *
4190 * purpose: evaluates FCP_RSP IU
4191 *
4192 * returns:
4193 */
4194 static int
4195 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4196 {
4197 int retval = 0;
4198 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4199 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4200 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4201 struct zfcp_unit *unit =
4202 fsf_req->data.send_fcp_command_task_management.unit;
4203
4204 del_timer(&fsf_req->adapter->scsi_er_timer);
4205 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4206 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4207 goto skip_fsfstatus;
4208 }
4209
4210 /* check FCP_RSP_INFO */
4211 switch (fcp_rsp_info[3]) {
4212 case RSP_CODE_GOOD:
4213 /* ok, continue */
4214 ZFCP_LOG_DEBUG("no failure or Task Management "
4215 "Function complete\n");
4216 break;
4217 case RSP_CODE_TASKMAN_UNSUPP:
4218 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4219 "is not supported on the target device "
4220 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4221 unit->fcp_lun,
4222 unit->port->wwpn,
4223 zfcp_get_busid_by_unit(unit));
4224 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4225 break;
4226 case RSP_CODE_TASKMAN_FAILED:
4227 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4228 "failed to complete successfully. "
4229 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4230 unit->fcp_lun,
4231 unit->port->wwpn,
4232 zfcp_get_busid_by_unit(unit));
4233 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4234 break;
4235 default:
4236 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4237 "code was detected for a command. "
4238 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4239 "(debug info 0x%x)\n",
4240 unit->fcp_lun,
4241 unit->port->wwpn,
4242 zfcp_get_busid_by_unit(unit),
4243 fcp_rsp_info[3]);
4244 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4245 }
4246
4247 skip_fsfstatus:
4248 return retval;
4249 }
4250
4251
4252 /*
4253 * function: zfcp_fsf_control_file
4254 *
4255 * purpose: Initiator of the control file upload/download FSF requests
4256 *
4257 * returns: 0 - FSF request is successfuly created and queued
4258 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4259 * -EINVAL - Invalid direction specified
4260 * -ENOMEM - Insufficient memory
4261 * -EPERM - Cannot create FSF request or place it in QDIO queue
4262 */
4263 int
4264 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4265 struct zfcp_fsf_req **fsf_req_ptr,
4266 u32 fsf_command,
4267 u32 option,
4268 struct zfcp_sg_list *sg_list)
4269 {
4270 struct zfcp_fsf_req *fsf_req;
4271 struct fsf_qtcb_bottom_support *bottom;
4272 volatile struct qdio_buffer_element *sbale;
4273 struct timer_list *timer;
4274 unsigned long lock_flags;
4275 int req_flags = 0;
4276 int direction;
4277 int retval = 0;
4278
4279 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4280 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4281 zfcp_get_busid_by_adapter(adapter));
4282 retval = -EOPNOTSUPP;
4283 goto out;
4284 }
4285
4286 switch (fsf_command) {
4287
4288 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4289 direction = SBAL_FLAGS0_TYPE_WRITE;
4290 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4291 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4292 req_flags = ZFCP_WAIT_FOR_SBAL;
4293 break;
4294
4295 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4296 direction = SBAL_FLAGS0_TYPE_READ;
4297 break;
4298
4299 default:
4300 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4301 retval = -EINVAL;
4302 goto out;
4303 }
4304
4305 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4306 if (!timer) {
4307 retval = -ENOMEM;
4308 goto out;
4309 }
4310
4311 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4312 NULL, &lock_flags, &fsf_req);
4313 if (retval < 0) {
4314 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4315 "adapter %s\n",
4316 zfcp_get_busid_by_adapter(adapter));
4317 retval = -EPERM;
4318 goto unlock_queue_lock;
4319 }
4320
4321 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4322 sbale[0].flags |= direction;
4323
4324 bottom = &fsf_req->qtcb->bottom.support;
4325 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4326 bottom->option = option;
4327
4328 if (sg_list->count > 0) {
4329 int bytes;
4330
4331 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4332 sg_list->sg, sg_list->count,
4333 ZFCP_MAX_SBALS_PER_REQ);
4334 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4335 ZFCP_LOG_INFO(
4336 "error: Could not create sufficient number of "
4337 "SBALS for an FSF request to the adapter %s\n",
4338 zfcp_get_busid_by_adapter(adapter));
4339 retval = -ENOMEM;
4340 goto free_fsf_req;
4341 }
4342 } else
4343 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4344
4345 init_timer(timer);
4346 timer->function = zfcp_fsf_request_timeout_handler;
4347 timer->data = (unsigned long) adapter;
4348 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4349
4350 retval = zfcp_fsf_req_send(fsf_req, timer);
4351 if (retval < 0) {
4352 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4353 "(adapter %s)\n",
4354 zfcp_get_busid_by_adapter(adapter));
4355 retval = -EPERM;
4356 goto free_fsf_req;
4357 }
4358 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4359
4360 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4361 "adapter %s\n",
4362 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4363 "download" : "upload",
4364 zfcp_get_busid_by_adapter(adapter));
4365
4366 wait_event(fsf_req->completion_wq,
4367 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4368
4369 *fsf_req_ptr = fsf_req;
4370 del_timer_sync(timer);
4371 goto free_timer;
4372
4373 free_fsf_req:
4374 zfcp_fsf_req_free(fsf_req);
4375 unlock_queue_lock:
4376 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4377 free_timer:
4378 kfree(timer);
4379 out:
4380 return retval;
4381 }
4382
4383
4384 /*
4385 * function: zfcp_fsf_control_file_handler
4386 *
4387 * purpose: Handler of the control file upload/download FSF requests
4388 *
4389 * returns: 0 - FSF request successfuly processed
4390 * -EAGAIN - Operation has to be repeated because of a temporary problem
4391 * -EACCES - There is no permission to execute an operation
4392 * -EPERM - The control file is not in a right format
4393 * -EIO - There is a problem with the FCP adapter
4394 * -EINVAL - Invalid operation
4395 * -EFAULT - User space memory I/O operation fault
4396 */
4397 static int
4398 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4399 {
4400 struct zfcp_adapter *adapter = fsf_req->adapter;
4401 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4402 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4403 int retval = 0;
4404
4405 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4406 retval = -EINVAL;
4407 goto skip_fsfstatus;
4408 }
4409
4410 switch (header->fsf_status) {
4411
4412 case FSF_GOOD:
4413 ZFCP_LOG_NORMAL(
4414 "The FSF request has been successfully completed "
4415 "on the adapter %s\n",
4416 zfcp_get_busid_by_adapter(adapter));
4417 break;
4418
4419 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4420 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4421 switch (header->fsf_status_qual.word[0]) {
4422
4423 case FSF_SQ_CFDC_HARDENED_ON_SE:
4424 ZFCP_LOG_NORMAL(
4425 "CFDC on the adapter %s has being "
4426 "hardened on primary and secondary SE\n",
4427 zfcp_get_busid_by_adapter(adapter));
4428 break;
4429
4430 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4431 ZFCP_LOG_NORMAL(
4432 "CFDC of the adapter %s could not "
4433 "be saved on the SE\n",
4434 zfcp_get_busid_by_adapter(adapter));
4435 break;
4436
4437 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4438 ZFCP_LOG_NORMAL(
4439 "CFDC of the adapter %s could not "
4440 "be copied to the secondary SE\n",
4441 zfcp_get_busid_by_adapter(adapter));
4442 break;
4443
4444 default:
4445 ZFCP_LOG_NORMAL(
4446 "CFDC could not be hardened "
4447 "on the adapter %s\n",
4448 zfcp_get_busid_by_adapter(adapter));
4449 }
4450 }
4451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4452 retval = -EAGAIN;
4453 break;
4454
4455 case FSF_AUTHORIZATION_FAILURE:
4456 ZFCP_LOG_NORMAL(
4457 "Adapter %s does not accept privileged commands\n",
4458 zfcp_get_busid_by_adapter(adapter));
4459 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4460 retval = -EACCES;
4461 break;
4462
4463 case FSF_CFDC_ERROR_DETECTED:
4464 ZFCP_LOG_NORMAL(
4465 "Error at position %d in the CFDC, "
4466 "CFDC is discarded by the adapter %s\n",
4467 header->fsf_status_qual.word[0],
4468 zfcp_get_busid_by_adapter(adapter));
4469 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4470 retval = -EPERM;
4471 break;
4472
4473 case FSF_CONTROL_FILE_UPDATE_ERROR:
4474 ZFCP_LOG_NORMAL(
4475 "Adapter %s cannot harden the control file, "
4476 "file is discarded\n",
4477 zfcp_get_busid_by_adapter(adapter));
4478 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4479 retval = -EIO;
4480 break;
4481
4482 case FSF_CONTROL_FILE_TOO_LARGE:
4483 ZFCP_LOG_NORMAL(
4484 "Control file is too large, file is discarded "
4485 "by the adapter %s\n",
4486 zfcp_get_busid_by_adapter(adapter));
4487 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4488 retval = -EIO;
4489 break;
4490
4491 case FSF_ACCESS_CONFLICT_DETECTED:
4492 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4493 ZFCP_LOG_NORMAL(
4494 "CFDC has been discarded by the adapter %s, "
4495 "because activation would impact "
4496 "%d active connection(s)\n",
4497 zfcp_get_busid_by_adapter(adapter),
4498 header->fsf_status_qual.word[0]);
4499 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4500 retval = -EIO;
4501 break;
4502
4503 case FSF_CONFLICTS_OVERRULED:
4504 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4505 ZFCP_LOG_NORMAL(
4506 "CFDC has been activated on the adapter %s, "
4507 "but activation has impacted "
4508 "%d active connection(s)\n",
4509 zfcp_get_busid_by_adapter(adapter),
4510 header->fsf_status_qual.word[0]);
4511 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4512 retval = -EIO;
4513 break;
4514
4515 case FSF_UNKNOWN_OP_SUBTYPE:
4516 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4517 "op_subtype=0x%x)\n",
4518 zfcp_get_busid_by_adapter(adapter),
4519 bottom->operation_subtype);
4520 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4521 retval = -EINVAL;
4522 break;
4523
4524 case FSF_INVALID_COMMAND_OPTION:
4525 ZFCP_LOG_NORMAL(
4526 "Invalid option 0x%x has been specified "
4527 "in QTCB bottom sent to the adapter %s\n",
4528 bottom->option,
4529 zfcp_get_busid_by_adapter(adapter));
4530 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4531 retval = -EINVAL;
4532 break;
4533
4534 default:
4535 ZFCP_LOG_NORMAL(
4536 "bug: An unknown/unexpected FSF status 0x%08x "
4537 "was presented on the adapter %s\n",
4538 header->fsf_status,
4539 zfcp_get_busid_by_adapter(adapter));
4540 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4541 debug_exception(fsf_req->adapter->erp_dbf, 0,
4542 &header->fsf_status_qual.word[0], sizeof(u32));
4543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4544 retval = -EINVAL;
4545 break;
4546 }
4547
4548 skip_fsfstatus:
4549 return retval;
4550 }
4551
4552
4553 /*
4554 * function: zfcp_fsf_req_wait_and_cleanup
4555 *
4556 * purpose:
4557 *
4558 * FIXME(design): signal seems to be <0 !!!
4559 * returns: 0 - request completed (*status is valid), cleanup succ.
4560 * <0 - request completed (*status is valid), cleanup failed
4561 * >0 - signal which interrupted waiting (*status invalid),
4562 * request not completed, no cleanup
4563 *
4564 * *status is a copy of status of completed fsf_req
4565 */
4566 int
4567 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
4568 int interruptible, u32 * status)
4569 {
4570 int retval = 0;
4571 int signal = 0;
4572
4573 if (interruptible) {
4574 __wait_event_interruptible(fsf_req->completion_wq,
4575 fsf_req->status &
4576 ZFCP_STATUS_FSFREQ_COMPLETED,
4577 signal);
4578 if (signal) {
4579 ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
4580 "completion of the request at %p\n",
4581 signal, fsf_req);
4582 retval = signal;
4583 goto out;
4584 }
4585 } else {
4586 __wait_event(fsf_req->completion_wq,
4587 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4588 }
4589
4590 *status = fsf_req->status;
4591
4592 /* cleanup request */
4593 zfcp_fsf_req_free(fsf_req);
4594 out:
4595 return retval;
4596 }
4597
4598 static inline int
4599 zfcp_fsf_req_sbal_check(unsigned long *flags,
4600 struct zfcp_qdio_queue *queue, int needed)
4601 {
4602 write_lock_irqsave(&queue->queue_lock, *flags);
4603 if (likely(atomic_read(&queue->free_count) >= needed))
4604 return 1;
4605 write_unlock_irqrestore(&queue->queue_lock, *flags);
4606 return 0;
4607 }
4608
4609 /*
4610 * set qtcb pointer in fsf_req and initialize QTCB
4611 */
4612 static inline void
4613 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4614 {
4615 if (likely(fsf_req->qtcb != NULL)) {
4616 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4617 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4618 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4619 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4620 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4621 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4622 }
4623 }
4624
4625 /**
4626 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4627 * @adapter: adapter for which request queue is examined
4628 * @req_flags: flags indicating whether to wait for needed SBAL or not
4629 * @lock_flags: lock_flags if queue_lock is taken
4630 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4631 * Locks: lock adapter->request_queue->queue_lock on success
4632 */
4633 static int
4634 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4635 unsigned long *lock_flags)
4636 {
4637 long ret;
4638 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4639
4640 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4641 ret = wait_event_interruptible_timeout(adapter->request_wq,
4642 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4643 ZFCP_SBAL_TIMEOUT);
4644 if (ret < 0)
4645 return ret;
4646 if (!ret)
4647 return -EIO;
4648 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4649 return -EIO;
4650
4651 return 0;
4652 }
4653
4654 /*
4655 * function: zfcp_fsf_req_create
4656 *
4657 * purpose: create an FSF request at the specified adapter and
4658 * setup common fields
4659 *
4660 * returns: -ENOMEM if there was insufficient memory for a request
4661 * -EIO if no qdio buffers could be allocate to the request
4662 * -EINVAL/-EPERM on bug conditions in req_dequeue
4663 * 0 in success
4664 *
4665 * note: The created request is returned by reference.
4666 *
4667 * locks: lock of concerned request queue must not be held,
4668 * but is held on completion (write, irqsave)
4669 */
4670 int
4671 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4672 mempool_t *pool, unsigned long *lock_flags,
4673 struct zfcp_fsf_req **fsf_req_p)
4674 {
4675 volatile struct qdio_buffer_element *sbale;
4676 struct zfcp_fsf_req *fsf_req = NULL;
4677 int ret = 0;
4678 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4679
4680 /* allocate new FSF request */
4681 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4682 if (unlikely(NULL == fsf_req)) {
4683 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4684 "the outbound (send) queue.\n");
4685 ret = -ENOMEM;
4686 goto failed_fsf_req;
4687 }
4688
4689 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
4690
4691 /* initialize waitqueue which may be used to wait on
4692 this request completion */
4693 init_waitqueue_head(&fsf_req->completion_wq);
4694
4695 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4696 if(ret < 0) {
4697 goto failed_sbals;
4698 }
4699
4700 /*
4701 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4702 * if it is not set (see also *_open_qdio and *_close_qdio).
4703 */
4704
4705 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4706 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4707 ret = -EIO;
4708 goto failed_sbals;
4709 }
4710
4711 fsf_req->adapter = adapter; /* pointer to "parent" adapter */
4712 fsf_req->fsf_command = fsf_cmd;
4713 fsf_req->sbal_number = 1;
4714 fsf_req->sbal_first = req_queue->free_index;
4715 fsf_req->sbal_curr = req_queue->free_index;
4716 fsf_req->sbale_curr = 1;
4717
4718 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4719 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4720 }
4721
4722 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4723
4724 /* setup common SBALE fields */
4725 sbale[0].addr = fsf_req;
4726 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4727 if (likely(fsf_req->qtcb != NULL)) {
4728 sbale[1].addr = (void *) fsf_req->qtcb;
4729 sbale[1].length = sizeof(struct fsf_qtcb);
4730 }
4731
4732 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4733 fsf_req->sbal_number, fsf_req->sbal_first);
4734
4735 goto success;
4736
4737 failed_sbals:
4738 /* dequeue new FSF request previously enqueued */
4739 zfcp_fsf_req_free(fsf_req);
4740 fsf_req = NULL;
4741
4742 failed_fsf_req:
4743 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4744 success:
4745 *fsf_req_p = fsf_req;
4746 return ret;
4747 }
4748
4749 /*
4750 * function: zfcp_fsf_req_send
4751 *
4752 * purpose: start transfer of FSF request via QDIO
4753 *
4754 * returns: 0 - request transfer succesfully started
4755 * !0 - start of request transfer failed
4756 */
4757 static int
4758 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4759 {
4760 struct zfcp_adapter *adapter;
4761 struct zfcp_qdio_queue *req_queue;
4762 volatile struct qdio_buffer_element *sbale;
4763 int new_distance_from_int;
4764 unsigned long flags;
4765 int inc_seq_no = 1;
4766 int retval = 0;
4767
4768 adapter = fsf_req->adapter;
4769 req_queue = &adapter->request_queue,
4770
4771
4772 /* FIXME(debug): remove it later */
4773 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4774 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4775 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4776 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4777 sbale[1].length);
4778
4779 /* set sequence counter in QTCB */
4780 if (likely(fsf_req->qtcb)) {
4781 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4782 fsf_req->seq_no = adapter->fsf_req_seq_no;
4783 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4784 "FSF sequence counter value of %i\n",
4785 fsf_req,
4786 zfcp_get_busid_by_adapter(adapter),
4787 fsf_req->qtcb->prefix.req_seq_no);
4788 } else
4789 inc_seq_no = 0;
4790
4791 /* put allocated FSF request at list tail */
4792 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4793 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
4794 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4795
4796 /* figure out expiration time of timeout and start timeout */
4797 if (unlikely(timer)) {
4798 timer->expires += jiffies;
4799 add_timer(timer);
4800 }
4801
4802 ZFCP_LOG_TRACE("request queue of adapter %s: "
4803 "next free SBAL is %i, %i free SBALs\n",
4804 zfcp_get_busid_by_adapter(adapter),
4805 req_queue->free_index,
4806 atomic_read(&req_queue->free_count));
4807
4808 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4809 "index_in_queue=%i, count=%i, buffers=%p\n",
4810 zfcp_get_busid_by_adapter(adapter),
4811 QDIO_FLAG_SYNC_OUTPUT,
4812 0, fsf_req->sbal_first, fsf_req->sbal_number,
4813 &req_queue->buffer[fsf_req->sbal_first]);
4814
4815 /*
4816 * adjust the number of free SBALs in request queue as well as
4817 * position of first one
4818 */
4819 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4820 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4821 req_queue->free_index += fsf_req->sbal_number; /* increase */
4822 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4823 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4824
4825 retval = do_QDIO(adapter->ccw_device,
4826 QDIO_FLAG_SYNC_OUTPUT,
4827 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4828
4829 if (unlikely(retval)) {
4830 /* Queues are down..... */
4831 retval = -EIO;
4832 /*
4833 * FIXME(potential race):
4834 * timer might be expired (absolutely unlikely)
4835 */
4836 if (timer)
4837 del_timer(timer);
4838 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4839 list_del(&fsf_req->list);
4840 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4841 /*
4842 * adjust the number of free SBALs in request queue as well as
4843 * position of first one
4844 */
4845 zfcp_qdio_zero_sbals(req_queue->buffer,
4846 fsf_req->sbal_first, fsf_req->sbal_number);
4847 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4848 req_queue->free_index -= fsf_req->sbal_number; /* increase */
4849 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4850 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4851 ZFCP_LOG_DEBUG
4852 ("error: do_QDIO failed. Buffers could not be enqueued "
4853 "to request queue.\n");
4854 } else {
4855 req_queue->distance_from_int = new_distance_from_int;
4856 /*
4857 * increase FSF sequence counter -
4858 * this must only be done for request successfully enqueued to
4859 * QDIO this rejected requests may be cleaned up by calling
4860 * routines resulting in missing sequence counter values
4861 * otherwise,
4862 */
4863 /* Don't increase for unsolicited status */
4864 if (likely(inc_seq_no)) {
4865 adapter->fsf_req_seq_no++;
4866 ZFCP_LOG_TRACE
4867 ("FSF sequence counter value of adapter %s "
4868 "increased to %i\n",
4869 zfcp_get_busid_by_adapter(adapter),
4870 adapter->fsf_req_seq_no);
4871 }
4872 /* count FSF requests pending */
4873 atomic_inc(&adapter->fsf_reqs_active);
4874 }
4875 return retval;
4876 }
4877
4878 #undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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