?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[SCSI] zfcp: fix handling of port boxed and lun boxed fsf states
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
blob0d9f20edc490f8c5702e46953f8c357796eaf46d
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 return 0;
2066 }
2067
2068 /*
2069 * function: zfcp_fsf_exchange_config_data_handler
2070 *
2071 * purpose: is called for finished Exchange Configuration Data command
2072 *
2073 * returns:
2074 */
2075 static int
2076 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2077 {
2078 struct fsf_qtcb_bottom_config *bottom;
2079 struct zfcp_adapter *adapter = fsf_req->adapter;
2080
2081 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2082 return -EIO;
2083
2084 switch (fsf_req->qtcb->header.fsf_status) {
2085
2086 case FSF_GOOD:
2087 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2088 return -EIO;
2089
2090 switch (adapter->fc_topology) {
2091 case FSF_TOPO_P2P:
2092 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2093 "configuration detected at adapter %s\n"
2094 "Peer WWNN 0x%016llx, "
2095 "peer WWPN 0x%016llx, "
2096 "peer d_id 0x%06x\n",
2097 zfcp_get_busid_by_adapter(adapter),
2098 adapter->peer_wwnn,
2099 adapter->peer_wwpn,
2100 adapter->peer_d_id);
2101 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2102 "top-p-to-p");
2103 break;
2104 case FSF_TOPO_AL:
2105 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2106 "topology detected at adapter %s "
2107 "unsupported, shutting down adapter\n",
2108 zfcp_get_busid_by_adapter(adapter));
2109 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2110 "top-al");
2111 zfcp_erp_adapter_shutdown(adapter, 0);
2112 return -EIO;
2113 case FSF_TOPO_FABRIC:
2114 ZFCP_LOG_INFO("Switched fabric fibrechannel "
2115 "network detected at adapter %s.\n",
2116 zfcp_get_busid_by_adapter(adapter));
2117 break;
2118 default:
2119 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2120 "reported by the exchange "
2121 "configuration command for "
2122 "the adapter %s is not "
2123 "of a type known to the zfcp "
2124 "driver, shutting down adapter\n",
2125 zfcp_get_busid_by_adapter(adapter));
2126 adapter->fc_topology = FSF_TOPO_ERROR;
2127 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2128 "unknown-topo");
2129 zfcp_erp_adapter_shutdown(adapter, 0);
2130 return -EIO;
2131 }
2132 bottom = &fsf_req->qtcb->bottom.config;
2133 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2134 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2135 "allowed by the adapter %s "
2136 "is lower than the minimum "
2137 "required by the driver (%ld bytes).\n",
2138 bottom->max_qtcb_size,
2139 zfcp_get_busid_by_adapter(adapter),
2140 sizeof(struct fsf_qtcb));
2141 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2142 "qtcb-size");
2143 debug_event(fsf_req->adapter->erp_dbf, 0,
2144 &bottom->max_qtcb_size, sizeof (u32));
2145 zfcp_erp_adapter_shutdown(adapter, 0);
2146 return -EIO;
2147 }
2148 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2149 &adapter->status);
2150 break;
2151 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2152 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2153
2154 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2155 return -EIO;
2156
2157 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2158 zfcp_get_busid_by_adapter(adapter));
2159 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2160 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2161 &adapter->status);
2162 zfcp_erp_adapter_failed(adapter);
2163 break;
2164 default:
2165 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2166 debug_event(fsf_req->adapter->erp_dbf, 0,
2167 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2168 zfcp_erp_adapter_shutdown(adapter, 0);
2169 return -EIO;
2170 }
2171 return 0;
2172 }
2173
2174 /**
2175 * zfcp_fsf_exchange_port_data - request information about local port
2176 * @adapter: for which port data is requested
2177 * @data: response to exchange port data request
2178 */
2179 int
2180 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2181 struct fsf_qtcb_bottom_port *data)
2182 {
2183 volatile struct qdio_buffer_element *sbale;
2184 int retval = 0;
2185 unsigned long lock_flags;
2186 struct zfcp_fsf_req *fsf_req;
2187 struct timer_list *timer;
2188
2189 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2190 ZFCP_LOG_INFO("error: exchange port data "
2191 "command not supported by adapter %s\n",
2192 zfcp_get_busid_by_adapter(adapter));
2193 return -EOPNOTSUPP;
2194 }
2195
2196 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2197 if (!timer)
2198 return -ENOMEM;
2199
2200 /* setup new FSF request */
2201 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2202 0, 0, &lock_flags, &fsf_req);
2203 if (retval < 0) {
2204 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2205 "exchange port data request for"
2206 "the adapter %s.\n",
2207 zfcp_get_busid_by_adapter(adapter));
2208 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2209 lock_flags);
2210 goto out;
2211 }
2212
2213 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2214 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2215 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2216
2217 fsf_req->data.port_data = data;
2218
2219 init_timer(timer);
2220 timer->function = zfcp_fsf_request_timeout_handler;
2221 timer->data = (unsigned long) adapter;
2222 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2223
2224 retval = zfcp_fsf_req_send(fsf_req, timer);
2225 if (retval) {
2226 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2227 "command on the adapter %s\n",
2228 zfcp_get_busid_by_adapter(adapter));
2229 zfcp_fsf_req_free(fsf_req);
2230 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2231 lock_flags);
2232 goto out;
2233 }
2234
2235 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2236 zfcp_get_busid_by_adapter(adapter));
2237
2238 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2239 lock_flags);
2240
2241 wait_event(fsf_req->completion_wq,
2242 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2243 del_timer_sync(timer);
2244 zfcp_fsf_req_free(fsf_req);
2245 out:
2246 kfree(timer);
2247 return retval;
2248 }
2249
2250
2251 /**
2252 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2253 * @fsf_req: pointer to struct zfcp_fsf_req
2254 */
2255 static void
2256 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2257 {
2258 struct fsf_qtcb_bottom_port *bottom;
2259 struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
2260
2261 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2262 return;
2263
2264 switch (fsf_req->qtcb->header.fsf_status) {
2265 case FSF_GOOD:
2266 bottom = &fsf_req->qtcb->bottom.port;
2267 memcpy(data, bottom, sizeof(*data));
2268 break;
2269
2270 default:
2271 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2272 debug_event(fsf_req->adapter->erp_dbf, 0,
2273 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2274 }
2275 }
2276
2277
2278 /*
2279 * function: zfcp_fsf_open_port
2280 *
2281 * purpose:
2282 *
2283 * returns: address of initiated FSF request
2284 * NULL - request could not be initiated
2285 */
2286 int
2287 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2288 {
2289 volatile struct qdio_buffer_element *sbale;
2290 unsigned long lock_flags;
2291 int retval = 0;
2292
2293 /* setup new FSF request */
2294 retval = zfcp_fsf_req_create(erp_action->adapter,
2295 FSF_QTCB_OPEN_PORT_WITH_DID,
2296 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2297 erp_action->adapter->pool.fsf_req_erp,
2298 &lock_flags, &(erp_action->fsf_req));
2299 if (retval < 0) {
2300 ZFCP_LOG_INFO("error: Could not create open port request "
2301 "for port 0x%016Lx on adapter %s.\n",
2302 erp_action->port->wwpn,
2303 zfcp_get_busid_by_adapter(erp_action->adapter));
2304 goto out;
2305 }
2306
2307 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2308 erp_action->fsf_req->sbal_curr, 0);
2309 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2310 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2311
2312 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2313 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2314 erp_action->fsf_req->data.open_port.port = erp_action->port;
2315 erp_action->fsf_req->erp_action = erp_action;
2316
2317 /* start QDIO request for this FSF request */
2318 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2319 if (retval) {
2320 ZFCP_LOG_INFO("error: Could not send open port request for "
2321 "port 0x%016Lx on adapter %s.\n",
2322 erp_action->port->wwpn,
2323 zfcp_get_busid_by_adapter(erp_action->adapter));
2324 zfcp_fsf_req_free(erp_action->fsf_req);
2325 erp_action->fsf_req = NULL;
2326 goto out;
2327 }
2328
2329 ZFCP_LOG_DEBUG("open port request initiated "
2330 "(adapter %s, port 0x%016Lx)\n",
2331 zfcp_get_busid_by_adapter(erp_action->adapter),
2332 erp_action->port->wwpn);
2333 out:
2334 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2335 lock_flags);
2336 return retval;
2337 }
2338
2339 /*
2340 * function: zfcp_fsf_open_port_handler
2341 *
2342 * purpose: is called for finished Open Port command
2343 *
2344 * returns:
2345 */
2346 static int
2347 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2348 {
2349 int retval = -EINVAL;
2350 struct zfcp_port *port;
2351 struct fsf_plogi *plogi;
2352 struct fsf_qtcb_header *header;
2353 u16 subtable, rule, counter;
2354
2355 port = fsf_req->data.open_port.port;
2356 header = &fsf_req->qtcb->header;
2357
2358 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2359 /* don't change port status in our bookkeeping */
2360 goto skip_fsfstatus;
2361 }
2362
2363 /* evaluate FSF status in QTCB */
2364 switch (header->fsf_status) {
2365
2366 case FSF_PORT_ALREADY_OPEN:
2367 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2368 "is already open.\n",
2369 port->wwpn, zfcp_get_busid_by_port(port));
2370 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2371 "fsf_s_popen");
2372 /*
2373 * This is a bug, however operation should continue normally
2374 * if it is simply ignored
2375 */
2376 break;
2377
2378 case FSF_ACCESS_DENIED:
2379 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2380 "on adapter %s\n",
2381 port->wwpn, zfcp_get_busid_by_port(port));
2382 for (counter = 0; counter < 2; counter++) {
2383 subtable = header->fsf_status_qual.halfword[counter * 2];
2384 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2385 switch (subtable) {
2386 case FSF_SQ_CFDC_SUBTABLE_OS:
2387 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2388 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2389 case FSF_SQ_CFDC_SUBTABLE_LUN:
2390 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2391 zfcp_act_subtable_type[subtable], rule);
2392 break;
2393 }
2394 }
2395 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2396 zfcp_erp_port_access_denied(port);
2397 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2398 break;
2399
2400 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2401 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2402 "The remote port 0x%016Lx on adapter %s "
2403 "could not be opened. Disabling it.\n",
2404 port->wwpn, zfcp_get_busid_by_port(port));
2405 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2406 "fsf_s_max_ports");
2407 zfcp_erp_port_failed(port);
2408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2409 break;
2410
2411 case FSF_ADAPTER_STATUS_AVAILABLE:
2412 switch (header->fsf_status_qual.word[0]) {
2413 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2414 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2415 "fsf_sq_ltest");
2416 /* ERP strategy will escalate */
2417 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2418 break;
2419 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2420 /* ERP strategy will escalate */
2421 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2422 "fsf_sq_ulp");
2423 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2424 break;
2425 case FSF_SQ_NO_RETRY_POSSIBLE:
2426 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2427 "adapter %s could not be opened. "
2428 "Disabling it.\n",
2429 port->wwpn,
2430 zfcp_get_busid_by_port(port));
2431 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2432 "fsf_sq_no_retry");
2433 zfcp_erp_port_failed(port);
2434 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2435 break;
2436 default:
2437 ZFCP_LOG_NORMAL
2438 ("bug: Wrong status qualifier 0x%x arrived.\n",
2439 header->fsf_status_qual.word[0]);
2440 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2441 "fsf_sq_inval:");
2442 debug_exception(
2443 fsf_req->adapter->erp_dbf, 0,
2444 &header->fsf_status_qual.word[0],
2445 sizeof (u32));
2446 break;
2447 }
2448 break;
2449
2450 case FSF_GOOD:
2451 /* save port handle assigned by FSF */
2452 port->handle = header->port_handle;
2453 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2454 "was opened, it's port handle is 0x%x\n",
2455 port->wwpn, zfcp_get_busid_by_port(port),
2456 port->handle);
2457 /* mark port as open */
2458 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2459 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2460 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2461 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2462 &port->status);
2463 retval = 0;
2464 /* check whether D_ID has changed during open */
2465 /*
2466 * FIXME: This check is not airtight, as the FCP channel does
2467 * not monitor closures of target port connections caused on
2468 * the remote side. Thus, they might miss out on invalidating
2469 * locally cached WWPNs (and other N_Port parameters) of gone
2470 * target ports. So, our heroic attempt to make things safe
2471 * could be undermined by 'open port' response data tagged with
2472 * obsolete WWPNs. Another reason to monitor potential
2473 * connection closures ourself at least (by interpreting
2474 * incoming ELS' and unsolicited status). It just crosses my
2475 * mind that one should be able to cross-check by means of
2476 * another GID_PN straight after a port has been opened.
2477 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2478 */
2479 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2480 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2481 {
2482 if (fsf_req->qtcb->bottom.support.els1_length <
2483 ((((unsigned long) &plogi->serv_param.wwpn) -
2484 ((unsigned long) plogi)) + sizeof (u64))) {
2485 ZFCP_LOG_INFO(
2486 "warning: insufficient length of "
2487 "PLOGI payload (%i)\n",
2488 fsf_req->qtcb->bottom.support.els1_length);
2489 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2490 "fsf_s_short_plogi:");
2491 /* skip sanity check and assume wwpn is ok */
2492 } else {
2493 if (plogi->serv_param.wwpn != port->wwpn) {
2494 ZFCP_LOG_INFO("warning: d_id of port "
2495 "0x%016Lx changed during "
2496 "open\n", port->wwpn);
2497 debug_text_event(
2498 fsf_req->adapter->erp_dbf, 0,
2499 "fsf_s_did_change:");
2500 atomic_clear_mask(
2501 ZFCP_STATUS_PORT_DID_DID,
2502 &port->status);
2503 } else
2504 port->wwnn = plogi->serv_param.wwnn;
2505 }
2506 }
2507 break;
2508
2509 case FSF_UNKNOWN_OP_SUBTYPE:
2510 /* should never occure, subtype not set in zfcp_fsf_open_port */
2511 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2512 "op_subtype=0x%x)\n",
2513 zfcp_get_busid_by_port(port),
2514 fsf_req->qtcb->bottom.support.operation_subtype);
2515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2516 break;
2517
2518 default:
2519 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2520 "(debug info 0x%x)\n",
2521 header->fsf_status);
2522 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2523 debug_exception(fsf_req->adapter->erp_dbf, 0,
2524 &header->fsf_status, sizeof (u32));
2525 break;
2526 }
2527
2528 skip_fsfstatus:
2529 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2530 return retval;
2531 }
2532
2533 /*
2534 * function: zfcp_fsf_close_port
2535 *
2536 * purpose: submit FSF command "close port"
2537 *
2538 * returns: address of initiated FSF request
2539 * NULL - request could not be initiated
2540 */
2541 int
2542 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2543 {
2544 volatile struct qdio_buffer_element *sbale;
2545 unsigned long lock_flags;
2546 int retval = 0;
2547
2548 /* setup new FSF request */
2549 retval = zfcp_fsf_req_create(erp_action->adapter,
2550 FSF_QTCB_CLOSE_PORT,
2551 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2552 erp_action->adapter->pool.fsf_req_erp,
2553 &lock_flags, &(erp_action->fsf_req));
2554 if (retval < 0) {
2555 ZFCP_LOG_INFO("error: Could not create a close port request "
2556 "for port 0x%016Lx on adapter %s.\n",
2557 erp_action->port->wwpn,
2558 zfcp_get_busid_by_adapter(erp_action->adapter));
2559 goto out;
2560 }
2561
2562 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2563 erp_action->fsf_req->sbal_curr, 0);
2564 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2565 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2566
2567 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2568 erp_action->fsf_req->data.close_port.port = erp_action->port;
2569 erp_action->fsf_req->erp_action = erp_action;
2570 erp_action->fsf_req->qtcb->header.port_handle =
2571 erp_action->port->handle;
2572
2573 /* start QDIO request for this FSF request */
2574 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2575 if (retval) {
2576 ZFCP_LOG_INFO("error: Could not send a close port request for "
2577 "port 0x%016Lx on adapter %s.\n",
2578 erp_action->port->wwpn,
2579 zfcp_get_busid_by_adapter(erp_action->adapter));
2580 zfcp_fsf_req_free(erp_action->fsf_req);
2581 erp_action->fsf_req = NULL;
2582 goto out;
2583 }
2584
2585 ZFCP_LOG_TRACE("close port request initiated "
2586 "(adapter %s, port 0x%016Lx)\n",
2587 zfcp_get_busid_by_adapter(erp_action->adapter),
2588 erp_action->port->wwpn);
2589 out:
2590 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2591 lock_flags);
2592 return retval;
2593 }
2594
2595 /*
2596 * function: zfcp_fsf_close_port_handler
2597 *
2598 * purpose: is called for finished Close Port FSF command
2599 *
2600 * returns:
2601 */
2602 static int
2603 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2604 {
2605 int retval = -EINVAL;
2606 struct zfcp_port *port;
2607
2608 port = fsf_req->data.close_port.port;
2609
2610 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2611 /* don't change port status in our bookkeeping */
2612 goto skip_fsfstatus;
2613 }
2614
2615 /* evaluate FSF status in QTCB */
2616 switch (fsf_req->qtcb->header.fsf_status) {
2617
2618 case FSF_PORT_HANDLE_NOT_VALID:
2619 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2620 "0x%016Lx on adapter %s invalid. This may happen "
2621 "occasionally.\n", port->handle,
2622 port->wwpn, zfcp_get_busid_by_port(port));
2623 ZFCP_LOG_DEBUG("status qualifier:\n");
2624 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2625 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2626 sizeof (union fsf_status_qual));
2627 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2628 "fsf_s_phand_nv");
2629 zfcp_erp_adapter_reopen(port->adapter, 0);
2630 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2631 break;
2632
2633 case FSF_ADAPTER_STATUS_AVAILABLE:
2634 /* Note: FSF has actually closed the port in this case.
2635 * The status code is just daft. Fingers crossed for a change
2636 */
2637 retval = 0;
2638 break;
2639
2640 case FSF_GOOD:
2641 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2642 "port handle 0x%x\n", port->wwpn,
2643 zfcp_get_busid_by_port(port), port->handle);
2644 zfcp_erp_modify_port_status(port,
2645 ZFCP_STATUS_COMMON_OPEN,
2646 ZFCP_CLEAR);
2647 retval = 0;
2648 break;
2649
2650 default:
2651 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2652 "(debug info 0x%x)\n",
2653 fsf_req->qtcb->header.fsf_status);
2654 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2655 debug_exception(fsf_req->adapter->erp_dbf, 0,
2656 &fsf_req->qtcb->header.fsf_status,
2657 sizeof (u32));
2658 break;
2659 }
2660
2661 skip_fsfstatus:
2662 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2663 return retval;
2664 }
2665
2666 /*
2667 * function: zfcp_fsf_close_physical_port
2668 *
2669 * purpose: submit FSF command "close physical port"
2670 *
2671 * returns: address of initiated FSF request
2672 * NULL - request could not be initiated
2673 */
2674 int
2675 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2676 {
2677 int retval = 0;
2678 unsigned long lock_flags;
2679 volatile struct qdio_buffer_element *sbale;
2680
2681 /* setup new FSF request */
2682 retval = zfcp_fsf_req_create(erp_action->adapter,
2683 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2684 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2685 erp_action->adapter->pool.fsf_req_erp,
2686 &lock_flags, &erp_action->fsf_req);
2687 if (retval < 0) {
2688 ZFCP_LOG_INFO("error: Could not create close physical port "
2689 "request (adapter %s, port 0x%016Lx)\n",
2690 zfcp_get_busid_by_adapter(erp_action->adapter),
2691 erp_action->port->wwpn);
2692
2693 goto out;
2694 }
2695
2696 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2697 erp_action->fsf_req->sbal_curr, 0);
2698 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2699 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2700
2701 /* mark port as being closed */
2702 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2703 &erp_action->port->status);
2704 /* save a pointer to this port */
2705 erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
2706 /* port to be closeed */
2707 erp_action->fsf_req->qtcb->header.port_handle =
2708 erp_action->port->handle;
2709 erp_action->fsf_req->erp_action = erp_action;
2710
2711 /* start QDIO request for this FSF request */
2712 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2713 if (retval) {
2714 ZFCP_LOG_INFO("error: Could not send close physical port "
2715 "request (adapter %s, port 0x%016Lx)\n",
2716 zfcp_get_busid_by_adapter(erp_action->adapter),
2717 erp_action->port->wwpn);
2718 zfcp_fsf_req_free(erp_action->fsf_req);
2719 erp_action->fsf_req = NULL;
2720 goto out;
2721 }
2722
2723 ZFCP_LOG_TRACE("close physical port request initiated "
2724 "(adapter %s, port 0x%016Lx)\n",
2725 zfcp_get_busid_by_adapter(erp_action->adapter),
2726 erp_action->port->wwpn);
2727 out:
2728 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2729 lock_flags);
2730 return retval;
2731 }
2732
2733 /*
2734 * function: zfcp_fsf_close_physical_port_handler
2735 *
2736 * purpose: is called for finished Close Physical Port FSF command
2737 *
2738 * returns:
2739 */
2740 static int
2741 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2742 {
2743 int retval = -EINVAL;
2744 struct zfcp_port *port;
2745 struct zfcp_unit *unit;
2746 struct fsf_qtcb_header *header;
2747 u16 subtable, rule, counter;
2748
2749 port = fsf_req->data.close_physical_port.port;
2750 header = &fsf_req->qtcb->header;
2751
2752 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2753 /* don't change port status in our bookkeeping */
2754 goto skip_fsfstatus;
2755 }
2756
2757 /* evaluate FSF status in QTCB */
2758 switch (header->fsf_status) {
2759
2760 case FSF_PORT_HANDLE_NOT_VALID:
2761 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2762 "(adapter %s, port 0x%016Lx). "
2763 "This may happen occasionally.\n",
2764 port->handle,
2765 zfcp_get_busid_by_port(port),
2766 port->wwpn);
2767 ZFCP_LOG_DEBUG("status qualifier:\n");
2768 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2769 (char *) &header->fsf_status_qual,
2770 sizeof (union fsf_status_qual));
2771 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2772 "fsf_s_phand_nv");
2773 zfcp_erp_adapter_reopen(port->adapter, 0);
2774 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2775 break;
2776
2777 case FSF_ACCESS_DENIED:
2778 ZFCP_LOG_NORMAL("Access denied, cannot close "
2779 "physical port 0x%016Lx on adapter %s\n",
2780 port->wwpn, zfcp_get_busid_by_port(port));
2781 for (counter = 0; counter < 2; counter++) {
2782 subtable = header->fsf_status_qual.halfword[counter * 2];
2783 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2784 switch (subtable) {
2785 case FSF_SQ_CFDC_SUBTABLE_OS:
2786 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2787 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2788 case FSF_SQ_CFDC_SUBTABLE_LUN:
2789 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2790 zfcp_act_subtable_type[subtable], rule);
2791 break;
2792 }
2793 }
2794 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2795 zfcp_erp_port_access_denied(port);
2796 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2797 break;
2798
2799 case FSF_PORT_BOXED:
2800 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2801 "%s needs to be reopened but it was attempted "
2802 "to close it physically.\n",
2803 port->wwpn,
2804 zfcp_get_busid_by_port(port));
2805 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2806 zfcp_erp_port_boxed(port);
2807 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2808 ZFCP_STATUS_FSFREQ_RETRY;
2809 break;
2810
2811 case FSF_ADAPTER_STATUS_AVAILABLE:
2812 switch (header->fsf_status_qual.word[0]) {
2813 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2814 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2815 "fsf_sq_ltest");
2816 /* This will now be escalated by ERP */
2817 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2818 break;
2819 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2820 /* ERP strategy will escalate */
2821 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2822 "fsf_sq_ulp");
2823 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2824 break;
2825 default:
2826 ZFCP_LOG_NORMAL
2827 ("bug: Wrong status qualifier 0x%x arrived.\n",
2828 header->fsf_status_qual.word[0]);
2829 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2830 "fsf_sq_inval:");
2831 debug_exception(
2832 fsf_req->adapter->erp_dbf, 0,
2833 &header->fsf_status_qual.word[0], sizeof (u32));
2834 break;
2835 }
2836 break;
2837
2838 case FSF_GOOD:
2839 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2840 "physically closed, port handle 0x%x\n",
2841 port->wwpn,
2842 zfcp_get_busid_by_port(port), port->handle);
2843 /* can't use generic zfcp_erp_modify_port_status because
2844 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2845 */
2846 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2847 list_for_each_entry(unit, &port->unit_list_head, list)
2848 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2849 retval = 0;
2850 break;
2851
2852 default:
2853 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2854 "(debug info 0x%x)\n",
2855 header->fsf_status);
2856 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2857 debug_exception(fsf_req->adapter->erp_dbf, 0,
2858 &header->fsf_status, sizeof (u32));
2859 break;
2860 }
2861
2862 skip_fsfstatus:
2863 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2864 return retval;
2865 }
2866
2867 /*
2868 * function: zfcp_fsf_open_unit
2869 *
2870 * purpose:
2871 *
2872 * returns:
2873 *
2874 * assumptions: This routine does not check whether the associated
2875 * remote port has already been opened. This should be
2876 * done by calling routines. Otherwise some status
2877 * may be presented by FSF
2878 */
2879 int
2880 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2881 {
2882 volatile struct qdio_buffer_element *sbale;
2883 unsigned long lock_flags;
2884 int retval = 0;
2885
2886 /* setup new FSF request */
2887 retval = zfcp_fsf_req_create(erp_action->adapter,
2888 FSF_QTCB_OPEN_LUN,
2889 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2890 erp_action->adapter->pool.fsf_req_erp,
2891 &lock_flags, &(erp_action->fsf_req));
2892 if (retval < 0) {
2893 ZFCP_LOG_INFO("error: Could not create open unit request for "
2894 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2895 erp_action->unit->fcp_lun,
2896 erp_action->unit->port->wwpn,
2897 zfcp_get_busid_by_adapter(erp_action->adapter));
2898 goto out;
2899 }
2900
2901 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2902 erp_action->fsf_req->sbal_curr, 0);
2903 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2904 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2905
2906 erp_action->fsf_req->qtcb->header.port_handle =
2907 erp_action->port->handle;
2908 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
2909 erp_action->unit->fcp_lun;
2910 erp_action->fsf_req->qtcb->bottom.support.option =
2911 FSF_OPEN_LUN_SUPPRESS_BOXING;
2912 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2913 erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
2914 erp_action->fsf_req->erp_action = erp_action;
2915
2916 /* start QDIO request for this FSF request */
2917 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2918 if (retval) {
2919 ZFCP_LOG_INFO("error: Could not send an open unit request "
2920 "on the adapter %s, port 0x%016Lx for "
2921 "unit 0x%016Lx\n",
2922 zfcp_get_busid_by_adapter(erp_action->adapter),
2923 erp_action->port->wwpn,
2924 erp_action->unit->fcp_lun);
2925 zfcp_fsf_req_free(erp_action->fsf_req);
2926 erp_action->fsf_req = NULL;
2927 goto out;
2928 }
2929
2930 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2931 "port 0x%016Lx, unit 0x%016Lx)\n",
2932 zfcp_get_busid_by_adapter(erp_action->adapter),
2933 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2934 out:
2935 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2936 lock_flags);
2937 return retval;
2938 }
2939
2940 /*
2941 * function: zfcp_fsf_open_unit_handler
2942 *
2943 * purpose: is called for finished Open LUN command
2944 *
2945 * returns:
2946 */
2947 static int
2948 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2949 {
2950 int retval = -EINVAL;
2951 struct zfcp_adapter *adapter;
2952 struct zfcp_unit *unit;
2953 struct fsf_qtcb_header *header;
2954 struct fsf_qtcb_bottom_support *bottom;
2955 struct fsf_queue_designator *queue_designator;
2956 u16 subtable, rule, counter;
2957 u32 allowed, exclusive, readwrite;
2958
2959 unit = fsf_req->data.open_unit.unit;
2960
2961 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2962 /* don't change unit status in our bookkeeping */
2963 goto skip_fsfstatus;
2964 }
2965
2966 adapter = fsf_req->adapter;
2967 header = &fsf_req->qtcb->header;
2968 bottom = &fsf_req->qtcb->bottom.support;
2969 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2970
2971 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
2972 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
2973 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
2974
2975 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2976 ZFCP_STATUS_UNIT_SHARED |
2977 ZFCP_STATUS_UNIT_READONLY,
2978 &unit->status);
2979
2980 /* evaluate FSF status in QTCB */
2981 switch (header->fsf_status) {
2982
2983 case FSF_PORT_HANDLE_NOT_VALID:
2984 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
2985 "for port 0x%016Lx on adapter %s invalid "
2986 "This may happen occasionally\n",
2987 unit->port->handle,
2988 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
2989 ZFCP_LOG_DEBUG("status qualifier:\n");
2990 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2991 (char *) &header->fsf_status_qual,
2992 sizeof (union fsf_status_qual));
2993 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
2994 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
2995 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2996 break;
2997
2998 case FSF_LUN_ALREADY_OPEN:
2999 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3000 "remote port 0x%016Lx on adapter %s twice.\n",
3001 unit->fcp_lun,
3002 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3003 debug_text_exception(adapter->erp_dbf, 0,
3004 "fsf_s_uopen");
3005 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3006 break;
3007
3008 case FSF_ACCESS_DENIED:
3009 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3010 "remote port 0x%016Lx on adapter %s\n",
3011 unit->fcp_lun, unit->port->wwpn,
3012 zfcp_get_busid_by_unit(unit));
3013 for (counter = 0; counter < 2; counter++) {
3014 subtable = header->fsf_status_qual.halfword[counter * 2];
3015 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3016 switch (subtable) {
3017 case FSF_SQ_CFDC_SUBTABLE_OS:
3018 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3019 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3020 case FSF_SQ_CFDC_SUBTABLE_LUN:
3021 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3022 zfcp_act_subtable_type[subtable], rule);
3023 break;
3024 }
3025 }
3026 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3027 zfcp_erp_unit_access_denied(unit);
3028 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3029 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3030 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3031 break;
3032
3033 case FSF_PORT_BOXED:
3034 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3035 "needs to be reopened\n",
3036 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3037 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3038 zfcp_erp_port_boxed(unit->port);
3039 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3040 ZFCP_STATUS_FSFREQ_RETRY;
3041 break;
3042
3043 case FSF_LUN_SHARING_VIOLATION:
3044 if (header->fsf_status_qual.word[0] != 0) {
3045 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3046 "with WWPN 0x%Lx "
3047 "connected to the adapter %s "
3048 "is already in use in LPAR%d, CSS%d\n",
3049 unit->fcp_lun,
3050 unit->port->wwpn,
3051 zfcp_get_busid_by_unit(unit),
3052 queue_designator->hla,
3053 queue_designator->cssid);
3054 } else {
3055 subtable = header->fsf_status_qual.halfword[4];
3056 rule = header->fsf_status_qual.halfword[5];
3057 switch (subtable) {
3058 case FSF_SQ_CFDC_SUBTABLE_OS:
3059 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3060 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3061 case FSF_SQ_CFDC_SUBTABLE_LUN:
3062 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3063 "remote port with WWPN 0x%Lx "
3064 "connected to the adapter %s "
3065 "is denied (%s rule %d)\n",
3066 unit->fcp_lun,
3067 unit->port->wwpn,
3068 zfcp_get_busid_by_unit(unit),
3069 zfcp_act_subtable_type[subtable],
3070 rule);
3071 break;
3072 }
3073 }
3074 ZFCP_LOG_DEBUG("status qualifier:\n");
3075 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3076 (char *) &header->fsf_status_qual,
3077 sizeof (union fsf_status_qual));
3078 debug_text_event(adapter->erp_dbf, 2,
3079 "fsf_s_l_sh_vio");
3080 zfcp_erp_unit_access_denied(unit);
3081 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3082 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3083 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3084 break;
3085
3086 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3087 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3088 "There is no handle (temporary port identifier) "
3089 "available for unit 0x%016Lx on port 0x%016Lx "
3090 "on adapter %s\n",
3091 unit->fcp_lun,
3092 unit->port->wwpn,
3093 zfcp_get_busid_by_unit(unit));
3094 debug_text_event(adapter->erp_dbf, 1,
3095 "fsf_s_max_units");
3096 zfcp_erp_unit_failed(unit);
3097 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3098 break;
3099
3100 case FSF_ADAPTER_STATUS_AVAILABLE:
3101 switch (header->fsf_status_qual.word[0]) {
3102 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3103 /* Re-establish link to port */
3104 debug_text_event(adapter->erp_dbf, 1,
3105 "fsf_sq_ltest");
3106 zfcp_test_link(unit->port);
3107 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3108 break;
3109 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3110 /* ERP strategy will escalate */
3111 debug_text_event(adapter->erp_dbf, 1,
3112 "fsf_sq_ulp");
3113 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3114 break;
3115 default:
3116 ZFCP_LOG_NORMAL
3117 ("bug: Wrong status qualifier 0x%x arrived.\n",
3118 header->fsf_status_qual.word[0]);
3119 debug_text_event(adapter->erp_dbf, 0,
3120 "fsf_sq_inval:");
3121 debug_exception(adapter->erp_dbf, 0,
3122 &header->fsf_status_qual.word[0],
3123 sizeof (u32));
3124 }
3125 break;
3126
3127 case FSF_INVALID_COMMAND_OPTION:
3128 ZFCP_LOG_NORMAL(
3129 "Invalid option 0x%x has been specified "
3130 "in QTCB bottom sent to the adapter %s\n",
3131 bottom->option,
3132 zfcp_get_busid_by_adapter(adapter));
3133 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3134 retval = -EINVAL;
3135 break;
3136
3137 case FSF_GOOD:
3138 /* save LUN handle assigned by FSF */
3139 unit->handle = header->lun_handle;
3140 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3141 "adapter %s opened, port handle 0x%x\n",
3142 unit->fcp_lun,
3143 unit->port->wwpn,
3144 zfcp_get_busid_by_unit(unit),
3145 unit->handle);
3146 /* mark unit as open */
3147 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3148 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3149 ZFCP_STATUS_COMMON_ACCESS_BOXED,
3150 &unit->status);
3151 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3152 if (!exclusive)
3153 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3154 &unit->status);
3155
3156 if (!readwrite) {
3157 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3158 &unit->status);
3159 ZFCP_LOG_NORMAL("read-only access for unit "
3160 "(adapter %s, wwpn=0x%016Lx, "
3161 "fcp_lun=0x%016Lx)\n",
3162 zfcp_get_busid_by_unit(unit),
3163 unit->port->wwpn,
3164 unit->fcp_lun);
3165 }
3166
3167 if (exclusive && !readwrite) {
3168 ZFCP_LOG_NORMAL("exclusive access of read-only "
3169 "unit not supported\n");
3170 zfcp_erp_unit_failed(unit);
3171 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3172 zfcp_erp_unit_shutdown(unit, 0);
3173 } else if (!exclusive && readwrite) {
3174 ZFCP_LOG_NORMAL("shared access of read-write "
3175 "unit not supported\n");
3176 zfcp_erp_unit_failed(unit);
3177 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3178 zfcp_erp_unit_shutdown(unit, 0);
3179 }
3180 }
3181
3182 retval = 0;
3183 break;
3184
3185 default:
3186 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3187 "(debug info 0x%x)\n",
3188 header->fsf_status);
3189 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3190 debug_exception(adapter->erp_dbf, 0,
3191 &header->fsf_status, sizeof (u32));
3192 break;
3193 }
3194
3195 skip_fsfstatus:
3196 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3197 return retval;
3198 }
3199
3200 /*
3201 * function: zfcp_fsf_close_unit
3202 *
3203 * purpose:
3204 *
3205 * returns: address of fsf_req - request successfully initiated
3206 * NULL -
3207 *
3208 * assumptions: This routine does not check whether the associated
3209 * remote port/lun has already been opened. This should be
3210 * done by calling routines. Otherwise some status
3211 * may be presented by FSF
3212 */
3213 int
3214 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3215 {
3216 volatile struct qdio_buffer_element *sbale;
3217 unsigned long lock_flags;
3218 int retval = 0;
3219
3220 /* setup new FSF request */
3221 retval = zfcp_fsf_req_create(erp_action->adapter,
3222 FSF_QTCB_CLOSE_LUN,
3223 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3224 erp_action->adapter->pool.fsf_req_erp,
3225 &lock_flags, &(erp_action->fsf_req));
3226 if (retval < 0) {
3227 ZFCP_LOG_INFO("error: Could not create close unit request for "
3228 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3229 erp_action->unit->fcp_lun,
3230 erp_action->port->wwpn,
3231 zfcp_get_busid_by_adapter(erp_action->adapter));
3232 goto out;
3233 }
3234
3235 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3236 erp_action->fsf_req->sbal_curr, 0);
3237 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3238 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3239
3240 erp_action->fsf_req->qtcb->header.port_handle =
3241 erp_action->port->handle;
3242 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3243 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3244 erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
3245 erp_action->fsf_req->erp_action = erp_action;
3246
3247 /* start QDIO request for this FSF request */
3248 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3249 if (retval) {
3250 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3251 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3252 erp_action->unit->fcp_lun,
3253 erp_action->port->wwpn,
3254 zfcp_get_busid_by_adapter(erp_action->adapter));
3255 zfcp_fsf_req_free(erp_action->fsf_req);
3256 erp_action->fsf_req = NULL;
3257 goto out;
3258 }
3259
3260 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3261 "port 0x%016Lx, unit 0x%016Lx)\n",
3262 zfcp_get_busid_by_adapter(erp_action->adapter),
3263 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3264 out:
3265 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3266 lock_flags);
3267 return retval;
3268 }
3269
3270 /*
3271 * function: zfcp_fsf_close_unit_handler
3272 *
3273 * purpose: is called for finished Close LUN FSF command
3274 *
3275 * returns:
3276 */
3277 static int
3278 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3279 {
3280 int retval = -EINVAL;
3281 struct zfcp_unit *unit;
3282
3283 unit = fsf_req->data.close_unit.unit; /* restore unit */
3284
3285 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3286 /* don't change unit status in our bookkeeping */
3287 goto skip_fsfstatus;
3288 }
3289
3290 /* evaluate FSF status in QTCB */
3291 switch (fsf_req->qtcb->header.fsf_status) {
3292
3293 case FSF_PORT_HANDLE_NOT_VALID:
3294 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3295 "0x%016Lx on adapter %s invalid. This may "
3296 "happen in rare circumstances\n",
3297 unit->port->handle,
3298 unit->port->wwpn,
3299 zfcp_get_busid_by_unit(unit));
3300 ZFCP_LOG_DEBUG("status qualifier:\n");
3301 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3302 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3303 sizeof (union fsf_status_qual));
3304 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3305 "fsf_s_phand_nv");
3306 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3307 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3308 &fsf_req->qtcb->header.fsf_status_qual,
3309 sizeof (union fsf_status_qual));
3310 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3311 break;
3312
3313 case FSF_LUN_HANDLE_NOT_VALID:
3314 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3315 "0x%016Lx on port 0x%016Lx on adapter %s is "
3316 "invalid. This may happen occasionally.\n",
3317 unit->handle,
3318 unit->fcp_lun,
3319 unit->port->wwpn,
3320 zfcp_get_busid_by_unit(unit));
3321 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3322 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3323 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3324 sizeof (union fsf_status_qual));
3325 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3326 "fsf_s_lhand_nv");
3327 zfcp_erp_port_reopen(unit->port, 0);
3328 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3329 &fsf_req->qtcb->header.fsf_status_qual,
3330 sizeof (union fsf_status_qual));
3331 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3332 break;
3333
3334 case FSF_PORT_BOXED:
3335 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3336 "needs to be reopened\n",
3337 unit->port->wwpn,
3338 zfcp_get_busid_by_unit(unit));
3339 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3340 zfcp_erp_port_boxed(unit->port);
3341 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3342 ZFCP_STATUS_FSFREQ_RETRY;
3343 break;
3344
3345 case FSF_ADAPTER_STATUS_AVAILABLE:
3346 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3347 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3348 /* re-establish link to port */
3349 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3350 "fsf_sq_ltest");
3351 zfcp_test_link(unit->port);
3352 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3353 break;
3354 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3355 /* ERP strategy will escalate */
3356 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3357 "fsf_sq_ulp");
3358 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3359 break;
3360 default:
3361 ZFCP_LOG_NORMAL
3362 ("bug: Wrong status qualifier 0x%x arrived.\n",
3363 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3364 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3365 "fsf_sq_inval:");
3366 debug_exception(
3367 fsf_req->adapter->erp_dbf, 0,
3368 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3369 sizeof (u32));
3370 break;
3371 }
3372 break;
3373
3374 case FSF_GOOD:
3375 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3376 "closed, port handle 0x%x\n",
3377 unit->fcp_lun,
3378 unit->port->wwpn,
3379 zfcp_get_busid_by_unit(unit),
3380 unit->handle);
3381 /* mark unit as closed */
3382 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3383 retval = 0;
3384 break;
3385
3386 default:
3387 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3388 "(debug info 0x%x)\n",
3389 fsf_req->qtcb->header.fsf_status);
3390 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3391 debug_exception(fsf_req->adapter->erp_dbf, 0,
3392 &fsf_req->qtcb->header.fsf_status,
3393 sizeof (u32));
3394 break;
3395 }
3396
3397 skip_fsfstatus:
3398 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3399 return retval;
3400 }
3401
3402 /**
3403 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3404 * @adapter: adapter where scsi command is issued
3405 * @unit: unit where command is sent to
3406 * @scsi_cmnd: scsi command to be sent
3407 * @timer: timer to be started when request is initiated
3408 * @req_flags: flags for fsf_request
3409 */
3410 int
3411 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3412 struct zfcp_unit *unit,
3413 struct scsi_cmnd * scsi_cmnd,
3414 struct timer_list *timer, int req_flags)
3415 {
3416 struct zfcp_fsf_req *fsf_req = NULL;
3417 struct fcp_cmnd_iu *fcp_cmnd_iu;
3418 unsigned int sbtype;
3419 unsigned long lock_flags;
3420 int real_bytes = 0;
3421 int retval = 0;
3422 int mask;
3423
3424 /* setup new FSF request */
3425 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3426 adapter->pool.fsf_req_scsi,
3427 &lock_flags, &fsf_req);
3428 if (unlikely(retval < 0)) {
3429 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3430 "for unit 0x%016Lx on port 0x%016Lx on "
3431 "adapter %s\n",
3432 unit->fcp_lun,
3433 unit->port->wwpn,
3434 zfcp_get_busid_by_adapter(adapter));
3435 goto failed_req_create;
3436 }
3437
3438 /*
3439 * associate FSF request with SCSI request
3440 * (need this for look up on abort)
3441 */
3442 fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
3443 scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
3444
3445 /*
3446 * associate SCSI command with FSF request
3447 * (need this for look up on normal command completion)
3448 */
3449 fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
3450 fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
3451 fsf_req->data.send_fcp_command_task.unit = unit;
3452 ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
3453
3454 /* set handles of unit and its parent port in QTCB */
3455 fsf_req->qtcb->header.lun_handle = unit->handle;
3456 fsf_req->qtcb->header.port_handle = unit->port->handle;
3457
3458 /* FSF does not define the structure of the FCP_CMND IU */
3459 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3460 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3461
3462 /*
3463 * set depending on data direction:
3464 * data direction bits in SBALE (SB Type)
3465 * data direction bits in QTCB
3466 * data direction bits in FCP_CMND IU
3467 */
3468 switch (scsi_cmnd->sc_data_direction) {
3469 case DMA_NONE:
3470 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3471 /*
3472 * FIXME(qdio):
3473 * what is the correct type for commands
3474 * without 'real' data buffers?
3475 */
3476 sbtype = SBAL_FLAGS0_TYPE_READ;
3477 break;
3478 case DMA_FROM_DEVICE:
3479 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3480 sbtype = SBAL_FLAGS0_TYPE_READ;
3481 fcp_cmnd_iu->rddata = 1;
3482 break;
3483 case DMA_TO_DEVICE:
3484 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3485 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3486 fcp_cmnd_iu->wddata = 1;
3487 break;
3488 case DMA_BIDIRECTIONAL:
3489 default:
3490 /*
3491 * dummy, catch this condition earlier
3492 * in zfcp_scsi_queuecommand
3493 */
3494 goto failed_scsi_cmnd;
3495 }
3496
3497 /* set FC service class in QTCB (3 per default) */
3498 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3499
3500 /* set FCP_LUN in FCP_CMND IU in QTCB */
3501 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3502
3503 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3504
3505 /* set task attributes in FCP_CMND IU in QTCB */
3506 if (likely((scsi_cmnd->device->simple_tags) ||
3507 (atomic_test_mask(mask, &unit->status))))
3508 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3509 else
3510 fcp_cmnd_iu->task_attribute = UNTAGGED;
3511
3512 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3513 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3514 fcp_cmnd_iu->add_fcp_cdb_length
3515 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3516 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3517 "additional FCP_CDB length is 0x%x "
3518 "(shifted right 2 bits)\n",
3519 scsi_cmnd->cmd_len,
3520 fcp_cmnd_iu->add_fcp_cdb_length);
3521 }
3522 /*
3523 * copy SCSI CDB (including additional length, if any) to
3524 * FCP_CDB in FCP_CMND IU in QTCB
3525 */
3526 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3527
3528 /* FCP CMND IU length in QTCB */
3529 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3530 sizeof (struct fcp_cmnd_iu) +
3531 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3532
3533 /* generate SBALEs from data buffer */
3534 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3535 if (unlikely(real_bytes < 0)) {
3536 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3537 ZFCP_LOG_DEBUG(
3538 "Data did not fit into available buffer(s), "
3539 "waiting for more...\n");
3540 retval = -EIO;
3541 } else {
3542 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3543 "required. Shutting down unit "
3544 "(adapter %s, port 0x%016Lx, "
3545 "unit 0x%016Lx)\n",
3546 zfcp_get_busid_by_unit(unit),
3547 unit->port->wwpn,
3548 unit->fcp_lun);
3549 zfcp_erp_unit_shutdown(unit, 0);
3550 retval = -EINVAL;
3551 }
3552 goto no_fit;
3553 }
3554
3555 /* set length of FCP data length in FCP_CMND IU in QTCB */
3556 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3557
3558 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3559 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3560 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3561
3562 /*
3563 * start QDIO request for this FSF request
3564 * covered by an SBALE)
3565 */
3566 retval = zfcp_fsf_req_send(fsf_req, timer);
3567 if (unlikely(retval < 0)) {
3568 ZFCP_LOG_INFO("error: Could not send FCP command request "
3569 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3570 zfcp_get_busid_by_adapter(adapter),
3571 unit->port->wwpn,
3572 unit->fcp_lun);
3573 goto send_failed;
3574 }
3575
3576 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3577 "port 0x%016Lx, unit 0x%016Lx)\n",
3578 zfcp_get_busid_by_adapter(adapter),
3579 unit->port->wwpn,
3580 unit->fcp_lun);
3581 goto success;
3582
3583 send_failed:
3584 no_fit:
3585 failed_scsi_cmnd:
3586 zfcp_fsf_req_free(fsf_req);
3587 fsf_req = NULL;
3588 scsi_cmnd->host_scribble = NULL;
3589 success:
3590 failed_req_create:
3591 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3592 return retval;
3593 }
3594
3595 /*
3596 * function: zfcp_fsf_send_fcp_command_task_management
3597 *
3598 * purpose:
3599 *
3600 * returns:
3601 *
3602 * FIXME(design): should be watched by a timeout!!!
3603 * FIXME(design) shouldn't this be modified to return an int
3604 * also...don't know how though
3605 *
3606 */
3607 struct zfcp_fsf_req *
3608 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3609 struct zfcp_unit *unit,
3610 u8 tm_flags, int req_flags)
3611 {
3612 struct zfcp_fsf_req *fsf_req = NULL;
3613 int retval = 0;
3614 struct fcp_cmnd_iu *fcp_cmnd_iu;
3615 unsigned long lock_flags;
3616 volatile struct qdio_buffer_element *sbale;
3617
3618 /* setup new FSF request */
3619 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3620 adapter->pool.fsf_req_scsi,
3621 &lock_flags, &fsf_req);
3622 if (retval < 0) {
3623 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3624 "management) request for adapter %s, port "
3625 " 0x%016Lx, unit 0x%016Lx.\n",
3626 zfcp_get_busid_by_adapter(adapter),
3627 unit->port->wwpn, unit->fcp_lun);
3628 goto out;
3629 }
3630
3631 /*
3632 * Used to decide on proper handler in the return path,
3633 * could be either zfcp_fsf_send_fcp_command_task_handler or
3634 * zfcp_fsf_send_fcp_command_task_management_handler */
3635
3636 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3637
3638 /*
3639 * hold a pointer to the unit being target of this
3640 * task management request
3641 */
3642 fsf_req->data.send_fcp_command_task_management.unit = unit;
3643
3644 /* set FSF related fields in QTCB */
3645 fsf_req->qtcb->header.lun_handle = unit->handle;
3646 fsf_req->qtcb->header.port_handle = unit->port->handle;
3647 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3648 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3649 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3650 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3651
3652 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3653 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3654 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3655
3656 /* set FCP related fields in FCP_CMND IU in QTCB */
3657 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3658 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3659 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3660 fcp_cmnd_iu->task_management_flags = tm_flags;
3661
3662 /* start QDIO request for this FSF request */
3663 zfcp_fsf_start_scsi_er_timer(adapter);
3664 retval = zfcp_fsf_req_send(fsf_req, NULL);
3665 if (retval) {
3666 del_timer(&adapter->scsi_er_timer);
3667 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3668 "management) on adapter %s, port 0x%016Lx for "
3669 "unit LUN 0x%016Lx\n",
3670 zfcp_get_busid_by_adapter(adapter),
3671 unit->port->wwpn,
3672 unit->fcp_lun);
3673 zfcp_fsf_req_free(fsf_req);
3674 fsf_req = NULL;
3675 goto out;
3676 }
3677
3678 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3679 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3680 "tm_flags=0x%x)\n",
3681 zfcp_get_busid_by_adapter(adapter),
3682 unit->port->wwpn,
3683 unit->fcp_lun,
3684 tm_flags);
3685 out:
3686 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3687 return fsf_req;
3688 }
3689
3690 /*
3691 * function: zfcp_fsf_send_fcp_command_handler
3692 *
3693 * purpose: is called for finished Send FCP Command
3694 *
3695 * returns:
3696 */
3697 static int
3698 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3699 {
3700 int retval = -EINVAL;
3701 struct zfcp_unit *unit;
3702 struct fsf_qtcb_header *header;
3703 u16 subtable, rule, counter;
3704
3705 header = &fsf_req->qtcb->header;
3706
3707 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3708 unit = fsf_req->data.send_fcp_command_task_management.unit;
3709 else
3710 unit = fsf_req->data.send_fcp_command_task.unit;
3711
3712 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3713 /* go directly to calls of special handlers */
3714 goto skip_fsfstatus;
3715 }
3716
3717 /* evaluate FSF status in QTCB */
3718 switch (header->fsf_status) {
3719
3720 case FSF_PORT_HANDLE_NOT_VALID:
3721 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3722 "0x%016Lx on adapter %s invalid\n",
3723 unit->port->handle,
3724 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3725 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3726 (char *) &header->fsf_status_qual,
3727 sizeof (union fsf_status_qual));
3728 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3729 "fsf_s_phand_nv");
3730 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3731 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3732 break;
3733
3734 case FSF_LUN_HANDLE_NOT_VALID:
3735 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3736 "0x%016Lx on port 0x%016Lx on adapter %s is "
3737 "invalid. This may happen occasionally.\n",
3738 unit->handle,
3739 unit->fcp_lun,
3740 unit->port->wwpn,
3741 zfcp_get_busid_by_unit(unit));
3742 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3743 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3744 (char *) &header->fsf_status_qual,
3745 sizeof (union fsf_status_qual));
3746 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3747 "fsf_s_uhand_nv");
3748 zfcp_erp_port_reopen(unit->port, 0);
3749 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3750 break;
3751
3752 case FSF_HANDLE_MISMATCH:
3753 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3754 "unexpectedly. (adapter %s, port 0x%016Lx, "
3755 "unit 0x%016Lx)\n",
3756 unit->port->handle,
3757 zfcp_get_busid_by_unit(unit),
3758 unit->port->wwpn,
3759 unit->fcp_lun);
3760 ZFCP_LOG_NORMAL("status qualifier:\n");
3761 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3762 (char *) &header->fsf_status_qual,
3763 sizeof (union fsf_status_qual));
3764 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3765 "fsf_s_hand_mis");
3766 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3767 zfcp_cmd_dbf_event_fsf("handmism",
3768 fsf_req,
3769 &header->fsf_status_qual,
3770 sizeof (union fsf_status_qual));
3771 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3772 break;
3773
3774 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3775 if (fsf_req->adapter->fc_service_class <= 3) {
3776 ZFCP_LOG_NORMAL("error: The adapter %s does "
3777 "not support fibrechannel class %d.\n",
3778 zfcp_get_busid_by_unit(unit),
3779 fsf_req->adapter->fc_service_class);
3780 } else {
3781 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3782 "adapter %s is invalid. "
3783 "(debug info %d)\n",
3784 zfcp_get_busid_by_unit(unit),
3785 fsf_req->adapter->fc_service_class);
3786 }
3787 /* stop operation for this adapter */
3788 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3789 "fsf_s_class_nsup");
3790 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3791 zfcp_cmd_dbf_event_fsf("unsclass",
3792 fsf_req,
3793 &header->fsf_status_qual,
3794 sizeof (union fsf_status_qual));
3795 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3796 break;
3797
3798 case FSF_FCPLUN_NOT_VALID:
3799 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3800 "adapter %s does not have correct unit "
3801 "handle 0x%x\n",
3802 unit->fcp_lun,
3803 unit->port->wwpn,
3804 zfcp_get_busid_by_unit(unit),
3805 unit->handle);
3806 ZFCP_LOG_DEBUG("status qualifier:\n");
3807 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3808 (char *) &header->fsf_status_qual,
3809 sizeof (union fsf_status_qual));
3810 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3811 "fsf_s_fcp_lun_nv");
3812 zfcp_erp_port_reopen(unit->port, 0);
3813 zfcp_cmd_dbf_event_fsf("fluninv",
3814 fsf_req,
3815 &header->fsf_status_qual,
3816 sizeof (union fsf_status_qual));
3817 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3818 break;
3819
3820 case FSF_ACCESS_DENIED:
3821 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3822 "unit 0x%016Lx on port 0x%016Lx on "
3823 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3824 zfcp_get_busid_by_unit(unit));
3825 for (counter = 0; counter < 2; counter++) {
3826 subtable = header->fsf_status_qual.halfword[counter * 2];
3827 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3828 switch (subtable) {
3829 case FSF_SQ_CFDC_SUBTABLE_OS:
3830 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3831 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3832 case FSF_SQ_CFDC_SUBTABLE_LUN:
3833 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3834 zfcp_act_subtable_type[subtable], rule);
3835 break;
3836 }
3837 }
3838 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3839 zfcp_erp_unit_access_denied(unit);
3840 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3841 break;
3842
3843 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3844 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3845 "0x%016Lx on port 0x%016Lx on adapter %s "
3846 "(debug info %d)\n",
3847 unit->fcp_lun,
3848 unit->port->wwpn,
3849 zfcp_get_busid_by_unit(unit),
3850 fsf_req->qtcb->bottom.io.data_direction);
3851 /* stop operation for this adapter */
3852 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3853 "fsf_s_dir_ind_nv");
3854 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3855 zfcp_cmd_dbf_event_fsf("dirinv",
3856 fsf_req,
3857 &header->fsf_status_qual,
3858 sizeof (union fsf_status_qual));
3859 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3860 break;
3861
3862 case FSF_CMND_LENGTH_NOT_VALID:
3863 ZFCP_LOG_NORMAL
3864 ("bug: An invalid control-data-block length field "
3865 "was found in a command for unit 0x%016Lx on port "
3866 "0x%016Lx on adapter %s " "(debug info %d)\n",
3867 unit->fcp_lun, unit->port->wwpn,
3868 zfcp_get_busid_by_unit(unit),
3869 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3870 /* stop operation for this adapter */
3871 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3872 "fsf_s_cmd_len_nv");
3873 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3874 zfcp_cmd_dbf_event_fsf("cleninv",
3875 fsf_req,
3876 &header->fsf_status_qual,
3877 sizeof (union fsf_status_qual));
3878 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3879 break;
3880
3881 case FSF_PORT_BOXED:
3882 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3883 "needs to be reopened\n",
3884 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3885 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3886 zfcp_erp_port_boxed(unit->port);
3887 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3888 ZFCP_STATUS_FSFREQ_RETRY;
3889 break;
3890
3891 case FSF_LUN_BOXED:
3892 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3893 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3894 zfcp_get_busid_by_unit(unit),
3895 unit->port->wwpn, unit->fcp_lun);
3896 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
3897 zfcp_erp_unit_boxed(unit);
3898 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3899 | ZFCP_STATUS_FSFREQ_RETRY;
3900 break;
3901
3902 case FSF_ADAPTER_STATUS_AVAILABLE:
3903 switch (header->fsf_status_qual.word[0]) {
3904 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3905 /* re-establish link to port */
3906 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3907 "fsf_sq_ltest");
3908 zfcp_test_link(unit->port);
3909 break;
3910 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3911 /* FIXME(hw) need proper specs for proper action */
3912 /* let scsi stack deal with retries and escalation */
3913 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3914 "fsf_sq_ulp");
3915 break;
3916 default:
3917 ZFCP_LOG_NORMAL
3918 ("Unknown status qualifier 0x%x arrived.\n",
3919 header->fsf_status_qual.word[0]);
3920 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3921 "fsf_sq_inval:");
3922 debug_exception(fsf_req->adapter->erp_dbf, 0,
3923 &header->fsf_status_qual.word[0],
3924 sizeof(u32));
3925 break;
3926 }
3927 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3928 break;
3929
3930 case FSF_GOOD:
3931 break;
3932
3933 case FSF_FCP_RSP_AVAILABLE:
3934 break;
3935
3936 default:
3937 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3938 debug_exception(fsf_req->adapter->erp_dbf, 0,
3939 &header->fsf_status, sizeof(u32));
3940 break;
3941 }
3942
3943 skip_fsfstatus:
3944 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3945 retval =
3946 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3947 } else {
3948 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
3949 }
3950 return retval;
3951 }
3952
3953 /*
3954 * function: zfcp_fsf_send_fcp_command_task_handler
3955 *
3956 * purpose: evaluates FCP_RSP IU
3957 *
3958 * returns:
3959 */
3960 static int
3961 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3962 {
3963 int retval = 0;
3964 struct scsi_cmnd *scpnt;
3965 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3966 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3967 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3968 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3969 u32 sns_len;
3970 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3971 unsigned long flags;
3972 struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit;
3973
3974 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
3975 scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
3976 if (unlikely(!scpnt)) {
3977 ZFCP_LOG_DEBUG
3978 ("Command with fsf_req %p is not associated to "
3979 "a scsi command anymore. Aborted?\n", fsf_req);
3980 goto out;
3981 }
3982 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3983 /* FIXME: (design) mid-layer should handle DID_ABORT like
3984 * DID_SOFT_ERROR by retrying the request for devices
3985 * that allow retries.
3986 */
3987 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
3988 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
3989 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
3990 goto skip_fsfstatus;
3991 }
3992
3993 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3994 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
3995 set_host_byte(&scpnt->result, DID_ERROR);
3996 goto skip_fsfstatus;
3997 }
3998
3999 /* set message byte of result in SCSI command */
4000 scpnt->result |= COMMAND_COMPLETE << 8;
4001
4002 /*
4003 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4004 * of result in SCSI command
4005 */
4006 scpnt->result |= fcp_rsp_iu->scsi_status;
4007 if (unlikely(fcp_rsp_iu->scsi_status)) {
4008 /* DEBUG */
4009 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4010 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4011 scpnt->cmnd, scpnt->cmd_len);
4012 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4013 fcp_rsp_iu->scsi_status);
4014 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4015 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4016 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4017 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4018 fcp_rsp_iu->fcp_sns_len);
4019 }
4020
4021 /* check FCP_RSP_INFO */
4022 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4023 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4024 switch (fcp_rsp_info[3]) {
4025 case RSP_CODE_GOOD:
4026 /* ok, continue */
4027 ZFCP_LOG_TRACE("no failure or Task Management "
4028 "Function complete\n");
4029 set_host_byte(&scpnt->result, DID_OK);
4030 break;
4031 case RSP_CODE_LENGTH_MISMATCH:
4032 /* hardware bug */
4033 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4034 "that the fibrechannel protocol data "
4035 "length differs from the burst length. "
4036 "The problem occured on unit 0x%016Lx "
4037 "on port 0x%016Lx on adapter %s",
4038 unit->fcp_lun,
4039 unit->port->wwpn,
4040 zfcp_get_busid_by_unit(unit));
4041 /* dump SCSI CDB as prepared by zfcp */
4042 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4043 (char *) &fsf_req->qtcb->
4044 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4045 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4046 set_host_byte(&scpnt->result, DID_ERROR);
4047 goto skip_fsfstatus;
4048 case RSP_CODE_FIELD_INVALID:
4049 /* driver or hardware bug */
4050 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4051 "that the fibrechannel protocol data "
4052 "fields were incorrectly set up. "
4053 "The problem occured on the unit "
4054 "0x%016Lx on port 0x%016Lx on "
4055 "adapter %s",
4056 unit->fcp_lun,
4057 unit->port->wwpn,
4058 zfcp_get_busid_by_unit(unit));
4059 /* dump SCSI CDB as prepared by zfcp */
4060 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4061 (char *) &fsf_req->qtcb->
4062 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4063 set_host_byte(&scpnt->result, DID_ERROR);
4064 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4065 goto skip_fsfstatus;
4066 case RSP_CODE_RO_MISMATCH:
4067 /* hardware bug */
4068 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4069 "that conflicting values for the "
4070 "fibrechannel payload offset from the "
4071 "header were found. "
4072 "The problem occured on unit 0x%016Lx "
4073 "on port 0x%016Lx on adapter %s.\n",
4074 unit->fcp_lun,
4075 unit->port->wwpn,
4076 zfcp_get_busid_by_unit(unit));
4077 /* dump SCSI CDB as prepared by zfcp */
4078 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4079 (char *) &fsf_req->qtcb->
4080 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4081 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4082 set_host_byte(&scpnt->result, DID_ERROR);
4083 goto skip_fsfstatus;
4084 default:
4085 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4086 "code was detected for a command. "
4087 "The problem occured on the unit "
4088 "0x%016Lx on port 0x%016Lx on "
4089 "adapter %s (debug info 0x%x)\n",
4090 unit->fcp_lun,
4091 unit->port->wwpn,
4092 zfcp_get_busid_by_unit(unit),
4093 fcp_rsp_info[3]);
4094 /* dump SCSI CDB as prepared by zfcp */
4095 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4096 (char *) &fsf_req->qtcb->
4097 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4098 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4099 set_host_byte(&scpnt->result, DID_ERROR);
4100 goto skip_fsfstatus;
4101 }
4102 }
4103
4104 /* check for sense data */
4105 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4106 sns_len = FSF_FCP_RSP_SIZE -
4107 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4108 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4109 sns_len);
4110 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4111 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4112 SCSI_SENSE_BUFFERSIZE);
4113 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4114 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4115 scpnt->result);
4116 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4117 (void *) &scpnt->cmnd, scpnt->cmd_len);
4118
4119 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4120 fcp_rsp_iu->fcp_sns_len);
4121 memcpy(&scpnt->sense_buffer,
4122 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4123 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4124 (void *) &scpnt->sense_buffer, sns_len);
4125 }
4126
4127 /* check for overrun */
4128 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4129 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4130 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4131 "The response data length is "
4132 "%d, the original length was %d.\n",
4133 unit->fcp_lun,
4134 unit->port->wwpn,
4135 zfcp_get_busid_by_unit(unit),
4136 fcp_rsp_iu->fcp_resid,
4137 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4138 }
4139
4140 /* check for underrun */
4141 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4142 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4143 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4144 "The response data length is "
4145 "%d, the original length was %d.\n",
4146 unit->fcp_lun,
4147 unit->port->wwpn,
4148 zfcp_get_busid_by_unit(unit),
4149 fcp_rsp_iu->fcp_resid,
4150 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4151
4152 scpnt->resid = fcp_rsp_iu->fcp_resid;
4153 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4154 set_host_byte(&scpnt->result, DID_ERROR);
4155 }
4156
4157 skip_fsfstatus:
4158 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4159
4160 zfcp_cmd_dbf_event_scsi("response", scpnt);
4161
4162 /* cleanup pointer (need this especially for abort) */
4163 scpnt->host_scribble = NULL;
4164
4165 /*
4166 * NOTE:
4167 * according to the outcome of a discussion on linux-scsi we
4168 * don't need to grab the io_request_lock here since we use
4169 * the new eh
4170 */
4171 /* always call back */
4172
4173 (scpnt->scsi_done) (scpnt);
4174
4175 /*
4176 * We must hold this lock until scsi_done has been called.
4177 * Otherwise we may call scsi_done after abort regarding this
4178 * command has completed.
4179 * Note: scsi_done must not block!
4180 */
4181 out:
4182 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4183 return retval;
4184 }
4185
4186 /*
4187 * function: zfcp_fsf_send_fcp_command_task_management_handler
4188 *
4189 * purpose: evaluates FCP_RSP IU
4190 *
4191 * returns:
4192 */
4193 static int
4194 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4195 {
4196 int retval = 0;
4197 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4198 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4199 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4200 struct zfcp_unit *unit =
4201 fsf_req->data.send_fcp_command_task_management.unit;
4202
4203 del_timer(&fsf_req->adapter->scsi_er_timer);
4204 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4205 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4206 goto skip_fsfstatus;
4207 }
4208
4209 /* check FCP_RSP_INFO */
4210 switch (fcp_rsp_info[3]) {
4211 case RSP_CODE_GOOD:
4212 /* ok, continue */
4213 ZFCP_LOG_DEBUG("no failure or Task Management "
4214 "Function complete\n");
4215 break;
4216 case RSP_CODE_TASKMAN_UNSUPP:
4217 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4218 "is not supported on the target device "
4219 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4220 unit->fcp_lun,
4221 unit->port->wwpn,
4222 zfcp_get_busid_by_unit(unit));
4223 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4224 break;
4225 case RSP_CODE_TASKMAN_FAILED:
4226 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4227 "failed to complete successfully. "
4228 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4229 unit->fcp_lun,
4230 unit->port->wwpn,
4231 zfcp_get_busid_by_unit(unit));
4232 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4233 break;
4234 default:
4235 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4236 "code was detected for a command. "
4237 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4238 "(debug info 0x%x)\n",
4239 unit->fcp_lun,
4240 unit->port->wwpn,
4241 zfcp_get_busid_by_unit(unit),
4242 fcp_rsp_info[3]);
4243 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4244 }
4245
4246 skip_fsfstatus:
4247 return retval;
4248 }
4249
4250
4251 /*
4252 * function: zfcp_fsf_control_file
4253 *
4254 * purpose: Initiator of the control file upload/download FSF requests
4255 *
4256 * returns: 0 - FSF request is successfuly created and queued
4257 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4258 * -EINVAL - Invalid direction specified
4259 * -ENOMEM - Insufficient memory
4260 * -EPERM - Cannot create FSF request or place it in QDIO queue
4261 */
4262 int
4263 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4264 struct zfcp_fsf_req **fsf_req_ptr,
4265 u32 fsf_command,
4266 u32 option,
4267 struct zfcp_sg_list *sg_list)
4268 {
4269 struct zfcp_fsf_req *fsf_req;
4270 struct fsf_qtcb_bottom_support *bottom;
4271 volatile struct qdio_buffer_element *sbale;
4272 struct timer_list *timer;
4273 unsigned long lock_flags;
4274 int req_flags = 0;
4275 int direction;
4276 int retval = 0;
4277
4278 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4279 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4280 zfcp_get_busid_by_adapter(adapter));
4281 retval = -EOPNOTSUPP;
4282 goto out;
4283 }
4284
4285 switch (fsf_command) {
4286
4287 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4288 direction = SBAL_FLAGS0_TYPE_WRITE;
4289 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4290 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4291 req_flags = ZFCP_WAIT_FOR_SBAL;
4292 break;
4293
4294 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4295 direction = SBAL_FLAGS0_TYPE_READ;
4296 break;
4297
4298 default:
4299 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4300 retval = -EINVAL;
4301 goto out;
4302 }
4303
4304 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4305 if (!timer) {
4306 retval = -ENOMEM;
4307 goto out;
4308 }
4309
4310 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4311 NULL, &lock_flags, &fsf_req);
4312 if (retval < 0) {
4313 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4314 "adapter %s\n",
4315 zfcp_get_busid_by_adapter(adapter));
4316 retval = -EPERM;
4317 goto unlock_queue_lock;
4318 }
4319
4320 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4321 sbale[0].flags |= direction;
4322
4323 bottom = &fsf_req->qtcb->bottom.support;
4324 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4325 bottom->option = option;
4326
4327 if (sg_list->count > 0) {
4328 int bytes;
4329
4330 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4331 sg_list->sg, sg_list->count,
4332 ZFCP_MAX_SBALS_PER_REQ);
4333 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4334 ZFCP_LOG_INFO(
4335 "error: Could not create sufficient number of "
4336 "SBALS for an FSF request to the adapter %s\n",
4337 zfcp_get_busid_by_adapter(adapter));
4338 retval = -ENOMEM;
4339 goto free_fsf_req;
4340 }
4341 } else
4342 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4343
4344 init_timer(timer);
4345 timer->function = zfcp_fsf_request_timeout_handler;
4346 timer->data = (unsigned long) adapter;
4347 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4348
4349 retval = zfcp_fsf_req_send(fsf_req, timer);
4350 if (retval < 0) {
4351 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4352 "(adapter %s)\n",
4353 zfcp_get_busid_by_adapter(adapter));
4354 retval = -EPERM;
4355 goto free_fsf_req;
4356 }
4357 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4358
4359 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4360 "adapter %s\n",
4361 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4362 "download" : "upload",
4363 zfcp_get_busid_by_adapter(adapter));
4364
4365 wait_event(fsf_req->completion_wq,
4366 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4367
4368 *fsf_req_ptr = fsf_req;
4369 del_timer_sync(timer);
4370 goto free_timer;
4371
4372 free_fsf_req:
4373 zfcp_fsf_req_free(fsf_req);
4374 unlock_queue_lock:
4375 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4376 free_timer:
4377 kfree(timer);
4378 out:
4379 return retval;
4380 }
4381
4382
4383 /*
4384 * function: zfcp_fsf_control_file_handler
4385 *
4386 * purpose: Handler of the control file upload/download FSF requests
4387 *
4388 * returns: 0 - FSF request successfuly processed
4389 * -EAGAIN - Operation has to be repeated because of a temporary problem
4390 * -EACCES - There is no permission to execute an operation
4391 * -EPERM - The control file is not in a right format
4392 * -EIO - There is a problem with the FCP adapter
4393 * -EINVAL - Invalid operation
4394 * -EFAULT - User space memory I/O operation fault
4395 */
4396 static int
4397 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4398 {
4399 struct zfcp_adapter *adapter = fsf_req->adapter;
4400 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4401 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4402 int retval = 0;
4403
4404 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4405 retval = -EINVAL;
4406 goto skip_fsfstatus;
4407 }
4408
4409 switch (header->fsf_status) {
4410
4411 case FSF_GOOD:
4412 ZFCP_LOG_NORMAL(
4413 "The FSF request has been successfully completed "
4414 "on the adapter %s\n",
4415 zfcp_get_busid_by_adapter(adapter));
4416 break;
4417
4418 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4419 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4420 switch (header->fsf_status_qual.word[0]) {
4421
4422 case FSF_SQ_CFDC_HARDENED_ON_SE:
4423 ZFCP_LOG_NORMAL(
4424 "CFDC on the adapter %s has being "
4425 "hardened on primary and secondary SE\n",
4426 zfcp_get_busid_by_adapter(adapter));
4427 break;
4428
4429 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4430 ZFCP_LOG_NORMAL(
4431 "CFDC of the adapter %s could not "
4432 "be saved on the SE\n",
4433 zfcp_get_busid_by_adapter(adapter));
4434 break;
4435
4436 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4437 ZFCP_LOG_NORMAL(
4438 "CFDC of the adapter %s could not "
4439 "be copied to the secondary SE\n",
4440 zfcp_get_busid_by_adapter(adapter));
4441 break;
4442
4443 default:
4444 ZFCP_LOG_NORMAL(
4445 "CFDC could not be hardened "
4446 "on the adapter %s\n",
4447 zfcp_get_busid_by_adapter(adapter));
4448 }
4449 }
4450 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4451 retval = -EAGAIN;
4452 break;
4453
4454 case FSF_AUTHORIZATION_FAILURE:
4455 ZFCP_LOG_NORMAL(
4456 "Adapter %s does not accept privileged commands\n",
4457 zfcp_get_busid_by_adapter(adapter));
4458 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4459 retval = -EACCES;
4460 break;
4461
4462 case FSF_CFDC_ERROR_DETECTED:
4463 ZFCP_LOG_NORMAL(
4464 "Error at position %d in the CFDC, "
4465 "CFDC is discarded by the adapter %s\n",
4466 header->fsf_status_qual.word[0],
4467 zfcp_get_busid_by_adapter(adapter));
4468 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4469 retval = -EPERM;
4470 break;
4471
4472 case FSF_CONTROL_FILE_UPDATE_ERROR:
4473 ZFCP_LOG_NORMAL(
4474 "Adapter %s cannot harden the control file, "
4475 "file is discarded\n",
4476 zfcp_get_busid_by_adapter(adapter));
4477 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4478 retval = -EIO;
4479 break;
4480
4481 case FSF_CONTROL_FILE_TOO_LARGE:
4482 ZFCP_LOG_NORMAL(
4483 "Control file is too large, file is discarded "
4484 "by the adapter %s\n",
4485 zfcp_get_busid_by_adapter(adapter));
4486 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4487 retval = -EIO;
4488 break;
4489
4490 case FSF_ACCESS_CONFLICT_DETECTED:
4491 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4492 ZFCP_LOG_NORMAL(
4493 "CFDC has been discarded by the adapter %s, "
4494 "because activation would impact "
4495 "%d active connection(s)\n",
4496 zfcp_get_busid_by_adapter(adapter),
4497 header->fsf_status_qual.word[0]);
4498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4499 retval = -EIO;
4500 break;
4501
4502 case FSF_CONFLICTS_OVERRULED:
4503 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4504 ZFCP_LOG_NORMAL(
4505 "CFDC has been activated on the adapter %s, "
4506 "but activation has impacted "
4507 "%d active connection(s)\n",
4508 zfcp_get_busid_by_adapter(adapter),
4509 header->fsf_status_qual.word[0]);
4510 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4511 retval = -EIO;
4512 break;
4513
4514 case FSF_UNKNOWN_OP_SUBTYPE:
4515 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4516 "op_subtype=0x%x)\n",
4517 zfcp_get_busid_by_adapter(adapter),
4518 bottom->operation_subtype);
4519 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4520 retval = -EINVAL;
4521 break;
4522
4523 case FSF_INVALID_COMMAND_OPTION:
4524 ZFCP_LOG_NORMAL(
4525 "Invalid option 0x%x has been specified "
4526 "in QTCB bottom sent to the adapter %s\n",
4527 bottom->option,
4528 zfcp_get_busid_by_adapter(adapter));
4529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4530 retval = -EINVAL;
4531 break;
4532
4533 default:
4534 ZFCP_LOG_NORMAL(
4535 "bug: An unknown/unexpected FSF status 0x%08x "
4536 "was presented on the adapter %s\n",
4537 header->fsf_status,
4538 zfcp_get_busid_by_adapter(adapter));
4539 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4540 debug_exception(fsf_req->adapter->erp_dbf, 0,
4541 &header->fsf_status_qual.word[0], sizeof(u32));
4542 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4543 retval = -EINVAL;
4544 break;
4545 }
4546
4547 skip_fsfstatus:
4548 return retval;
4549 }
4550
4551
4552 /*
4553 * function: zfcp_fsf_req_wait_and_cleanup
4554 *
4555 * purpose:
4556 *
4557 * FIXME(design): signal seems to be <0 !!!
4558 * returns: 0 - request completed (*status is valid), cleanup succ.
4559 * <0 - request completed (*status is valid), cleanup failed
4560 * >0 - signal which interrupted waiting (*status invalid),
4561 * request not completed, no cleanup
4562 *
4563 * *status is a copy of status of completed fsf_req
4564 */
4565 int
4566 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
4567 int interruptible, u32 * status)
4568 {
4569 int retval = 0;
4570 int signal = 0;
4571
4572 if (interruptible) {
4573 __wait_event_interruptible(fsf_req->completion_wq,
4574 fsf_req->status &
4575 ZFCP_STATUS_FSFREQ_COMPLETED,
4576 signal);
4577 if (signal) {
4578 ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
4579 "completion of the request at %p\n",
4580 signal, fsf_req);
4581 retval = signal;
4582 goto out;
4583 }
4584 } else {
4585 __wait_event(fsf_req->completion_wq,
4586 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4587 }
4588
4589 *status = fsf_req->status;
4590
4591 /* cleanup request */
4592 zfcp_fsf_req_free(fsf_req);
4593 out:
4594 return retval;
4595 }
4596
4597 static inline int
4598 zfcp_fsf_req_sbal_check(unsigned long *flags,
4599 struct zfcp_qdio_queue *queue, int needed)
4600 {
4601 write_lock_irqsave(&queue->queue_lock, *flags);
4602 if (likely(atomic_read(&queue->free_count) >= needed))
4603 return 1;
4604 write_unlock_irqrestore(&queue->queue_lock, *flags);
4605 return 0;
4606 }
4607
4608 /*
4609 * set qtcb pointer in fsf_req and initialize QTCB
4610 */
4611 static inline void
4612 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4613 {
4614 if (likely(fsf_req->qtcb != NULL)) {
4615 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4616 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4617 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4618 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4619 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4620 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4621 }
4622 }
4623
4624 /**
4625 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4626 * @adapter: adapter for which request queue is examined
4627 * @req_flags: flags indicating whether to wait for needed SBAL or not
4628 * @lock_flags: lock_flags if queue_lock is taken
4629 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4630 * Locks: lock adapter->request_queue->queue_lock on success
4631 */
4632 static int
4633 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4634 unsigned long *lock_flags)
4635 {
4636 long ret;
4637 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4638
4639 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4640 ret = wait_event_interruptible_timeout(adapter->request_wq,
4641 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4642 ZFCP_SBAL_TIMEOUT);
4643 if (ret < 0)
4644 return ret;
4645 if (!ret)
4646 return -EIO;
4647 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4648 return -EIO;
4649
4650 return 0;
4651 }
4652
4653 /*
4654 * function: zfcp_fsf_req_create
4655 *
4656 * purpose: create an FSF request at the specified adapter and
4657 * setup common fields
4658 *
4659 * returns: -ENOMEM if there was insufficient memory for a request
4660 * -EIO if no qdio buffers could be allocate to the request
4661 * -EINVAL/-EPERM on bug conditions in req_dequeue
4662 * 0 in success
4663 *
4664 * note: The created request is returned by reference.
4665 *
4666 * locks: lock of concerned request queue must not be held,
4667 * but is held on completion (write, irqsave)
4668 */
4669 int
4670 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4671 mempool_t *pool, unsigned long *lock_flags,
4672 struct zfcp_fsf_req **fsf_req_p)
4673 {
4674 volatile struct qdio_buffer_element *sbale;
4675 struct zfcp_fsf_req *fsf_req = NULL;
4676 int ret = 0;
4677 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4678
4679 /* allocate new FSF request */
4680 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4681 if (unlikely(NULL == fsf_req)) {
4682 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4683 "the outbound (send) queue.\n");
4684 ret = -ENOMEM;
4685 goto failed_fsf_req;
4686 }
4687
4688 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
4689
4690 /* initialize waitqueue which may be used to wait on
4691 this request completion */
4692 init_waitqueue_head(&fsf_req->completion_wq);
4693
4694 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4695 if(ret < 0) {
4696 goto failed_sbals;
4697 }
4698
4699 /*
4700 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4701 * if it is not set (see also *_open_qdio and *_close_qdio).
4702 */
4703
4704 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4705 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4706 ret = -EIO;
4707 goto failed_sbals;
4708 }
4709
4710 fsf_req->adapter = adapter; /* pointer to "parent" adapter */
4711 fsf_req->fsf_command = fsf_cmd;
4712 fsf_req->sbal_number = 1;
4713 fsf_req->sbal_first = req_queue->free_index;
4714 fsf_req->sbal_curr = req_queue->free_index;
4715 fsf_req->sbale_curr = 1;
4716
4717 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4718 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4719 }
4720
4721 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4722
4723 /* setup common SBALE fields */
4724 sbale[0].addr = fsf_req;
4725 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4726 if (likely(fsf_req->qtcb != NULL)) {
4727 sbale[1].addr = (void *) fsf_req->qtcb;
4728 sbale[1].length = sizeof(struct fsf_qtcb);
4729 }
4730
4731 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4732 fsf_req->sbal_number, fsf_req->sbal_first);
4733
4734 goto success;
4735
4736 failed_sbals:
4737 /* dequeue new FSF request previously enqueued */
4738 zfcp_fsf_req_free(fsf_req);
4739 fsf_req = NULL;
4740
4741 failed_fsf_req:
4742 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4743 success:
4744 *fsf_req_p = fsf_req;
4745 return ret;
4746 }
4747
4748 /*
4749 * function: zfcp_fsf_req_send
4750 *
4751 * purpose: start transfer of FSF request via QDIO
4752 *
4753 * returns: 0 - request transfer succesfully started
4754 * !0 - start of request transfer failed
4755 */
4756 static int
4757 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4758 {
4759 struct zfcp_adapter *adapter;
4760 struct zfcp_qdio_queue *req_queue;
4761 volatile struct qdio_buffer_element *sbale;
4762 int new_distance_from_int;
4763 unsigned long flags;
4764 int inc_seq_no = 1;
4765 int retval = 0;
4766
4767 adapter = fsf_req->adapter;
4768 req_queue = &adapter->request_queue,
4769
4770
4771 /* FIXME(debug): remove it later */
4772 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4773 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4774 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4775 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4776 sbale[1].length);
4777
4778 /* set sequence counter in QTCB */
4779 if (likely(fsf_req->qtcb)) {
4780 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4781 fsf_req->seq_no = adapter->fsf_req_seq_no;
4782 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4783 "FSF sequence counter value of %i\n",
4784 fsf_req,
4785 zfcp_get_busid_by_adapter(adapter),
4786 fsf_req->qtcb->prefix.req_seq_no);
4787 } else
4788 inc_seq_no = 0;
4789
4790 /* put allocated FSF request at list tail */
4791 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4792 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
4793 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4794
4795 /* figure out expiration time of timeout and start timeout */
4796 if (unlikely(timer)) {
4797 timer->expires += jiffies;
4798 add_timer(timer);
4799 }
4800
4801 ZFCP_LOG_TRACE("request queue of adapter %s: "
4802 "next free SBAL is %i, %i free SBALs\n",
4803 zfcp_get_busid_by_adapter(adapter),
4804 req_queue->free_index,
4805 atomic_read(&req_queue->free_count));
4806
4807 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4808 "index_in_queue=%i, count=%i, buffers=%p\n",
4809 zfcp_get_busid_by_adapter(adapter),
4810 QDIO_FLAG_SYNC_OUTPUT,
4811 0, fsf_req->sbal_first, fsf_req->sbal_number,
4812 &req_queue->buffer[fsf_req->sbal_first]);
4813
4814 /*
4815 * adjust the number of free SBALs in request queue as well as
4816 * position of first one
4817 */
4818 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4819 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4820 req_queue->free_index += fsf_req->sbal_number; /* increase */
4821 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4822 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4823
4824 retval = do_QDIO(adapter->ccw_device,
4825 QDIO_FLAG_SYNC_OUTPUT,
4826 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4827
4828 if (unlikely(retval)) {
4829 /* Queues are down..... */
4830 retval = -EIO;
4831 /*
4832 * FIXME(potential race):
4833 * timer might be expired (absolutely unlikely)
4834 */
4835 if (timer)
4836 del_timer(timer);
4837 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4838 list_del(&fsf_req->list);
4839 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4840 /*
4841 * adjust the number of free SBALs in request queue as well as
4842 * position of first one
4843 */
4844 zfcp_qdio_zero_sbals(req_queue->buffer,
4845 fsf_req->sbal_first, fsf_req->sbal_number);
4846 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4847 req_queue->free_index -= fsf_req->sbal_number; /* increase */
4848 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4849 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4850 ZFCP_LOG_DEBUG
4851 ("error: do_QDIO failed. Buffers could not be enqueued "
4852 "to request queue.\n");
4853 } else {
4854 req_queue->distance_from_int = new_distance_from_int;
4855 /*
4856 * increase FSF sequence counter -
4857 * this must only be done for request successfully enqueued to
4858 * QDIO this rejected requests may be cleaned up by calling
4859 * routines resulting in missing sequence counter values
4860 * otherwise,
4861 */
4862 /* Don't increase for unsolicited status */
4863 if (likely(inc_seq_no)) {
4864 adapter->fsf_req_seq_no++;
4865 ZFCP_LOG_TRACE
4866 ("FSF sequence counter value of adapter %s "
4867 "increased to %i\n",
4868 zfcp_get_busid_by_adapter(adapter),
4869 adapter->fsf_req_seq_no);
4870 }
4871 /* count FSF requests pending */
4872 atomic_inc(&adapter->fsf_reqs_active);
4873 }
4874 return retval;
4875 }
4876
4877 #undef ZFCP_LOG_AREA
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree