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[SCSI] zfcp: fix adapter initialization
[mirror_ubuntu-zesty-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4
LT		 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
37static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
38static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
39static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
40static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
41static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
42static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
43static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
44static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
45static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
46static int zfcp_fsf_send_fcp_command_task_management_handler(
47 struct zfcp_fsf_req *);
48static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
49static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
50static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
51static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
52static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
53static inline int zfcp_fsf_req_sbal_check(
54 unsigned long *, struct zfcp_qdio_queue *, int);
55static inline int zfcp_use_one_sbal(
56 struct scatterlist *, int, struct scatterlist *, int);
57static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
58static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *);
59static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
60static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
61static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
aef4a983
MS		 62static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *,
63 struct fsf_link_down_info *);
1da177e4
LT		 64static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
65static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
1da177e4
LT		 66
67/* association between FSF command and FSF QTCB type */
68static u32 fsf_qtcb_type[] = {
69 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
70 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
75 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
76 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
77 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
78 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
79 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
80 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
81 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
82};
83
84static const char zfcp_act_subtable_type[5][8] = {
85 "unknown", "OS", "WWPN", "DID", "LUN"
86};
87
88/****************************************************************/
89/*************** FSF related Functions *************************/
90/****************************************************************/
91
92#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
93
94/*
95 * function: zfcp_fsf_req_alloc
96 *
97 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
98 * unsolicited requests) via helper functions
99 * Does some initial fsf request set-up.
100 *
101 * returns: pointer to allocated fsf_req if successfull
102 * NULL otherwise
103 *
104 * locks: none
105 *
106 */
107static struct zfcp_fsf_req *
108zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
109{
110 size_t size;
111 void *ptr;
112 struct zfcp_fsf_req *fsf_req = NULL;
113
114 if (req_flags & ZFCP_REQ_NO_QTCB)
115 size = sizeof(struct zfcp_fsf_req);
116 else
117 size = sizeof(struct zfcp_fsf_req_pool_element);
118
119 if (likely(pool != NULL))
120 ptr = mempool_alloc(pool, GFP_ATOMIC);
121 else
122 ptr = kmalloc(size, GFP_ATOMIC);
123
124 if (unlikely(NULL == ptr))
125 goto out;
126
127 memset(ptr, 0, size);
128
129 if (req_flags & ZFCP_REQ_NO_QTCB) {
130 fsf_req = (struct zfcp_fsf_req *) ptr;
131 } else {
132 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
133 fsf_req->qtcb =
134 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
135 }
136
137 fsf_req->pool = pool;
138
139 out:
140 return fsf_req;
141}
142
143/*
144 * function: zfcp_fsf_req_free
145 *
146 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
147 * returns it into the pool via helper functions.
148 *
149 * returns: sod all
150 *
151 * locks: none
152 */
1db2c9c0 153void
1da177e4
LT		 154zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
155{
156 if (likely(fsf_req->pool != NULL))
157 mempool_free(fsf_req, fsf_req->pool);
1db2c9c0
AH		 158 else
159 kfree(fsf_req);
1da177e4
LT		 160}
161
162/*
163 * function:
164 *
165 * purpose:
166 *
167 * returns:
168 *
169 * note: qdio queues shall be down (no ongoing inbound processing)
170 */
171int
172zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
173{
1da177e4 174 struct zfcp_fsf_req *fsf_req, *tmp;
1db2c9c0
AH		 175 unsigned long flags;
176 LIST_HEAD(remove_queue);
1da177e4 177
1db2c9c0
AH		 178 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
179 list_splice_init(&adapter->fsf_req_list_head, &remove_queue);
180 atomic_set(&adapter->fsf_reqs_active, 0);
181 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4 182
1db2c9c0
AH		 183 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
184 list_del(&fsf_req->list);
185 zfcp_fsf_req_dismiss(fsf_req);
1da177e4
LT		 186 }
187
1db2c9c0 188 return 0;
1da177e4
LT		 189}
190
191/*
192 * function:
193 *
194 * purpose:
195 *
196 * returns:
197 */
198static void
199zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
200{
201 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
202 zfcp_fsf_req_complete(fsf_req);
203}
204
205/*
206 * function: zfcp_fsf_req_complete
207 *
208 * purpose: Updates active counts and timers for openfcp-reqs
209 * May cleanup request after req_eval returns
210 *
211 * returns: 0 - success
212 * !0 - failure
213 *
214 * context:
215 */
216int
217zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
218{
219 int retval = 0;
220 int cleanup;
1da177e4
LT		 221
222 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
223 ZFCP_LOG_DEBUG("Status read response received\n");
224 /*
225 * Note: all cleanup handling is done in the callchain of
226 * the function call-chain below.
227 */
228 zfcp_fsf_status_read_handler(fsf_req);
229 goto out;
230 } else
231 zfcp_fsf_protstatus_eval(fsf_req);
232
233 /*
234 * fsf_req may be deleted due to waking up functions, so
235 * cleanup is saved here and used later
236 */
237 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
238 cleanup = 1;
239 else
240 cleanup = 0;
241
242 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
243
244 /* cleanup request if requested by initiator */
245 if (likely(cleanup)) {
246 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
247 /*
248 * lock must not be held here since it will be
249 * grabed by the called routine, too
250 */
1db2c9c0 251 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 252 } else {
253 /* notify initiator waiting for the requests completion */
254 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
255 /*
256 * FIXME: Race! We must not access fsf_req here as it might have been
257 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
258 * flag. It's an improbable case. But, we have the same paranoia for
259 * the cleanup flag already.
260 * Might better be handled using complete()?
261 * (setting the flag and doing wakeup ought to be atomic
262 * with regard to checking the flag as long as waitqueue is
263 * part of the to be released structure)
264 */
265 wake_up(&fsf_req->completion_wq);
266 }
267
268 out:
269 return retval;
270}
271
272/*
273 * function: zfcp_fsf_protstatus_eval
274 *
275 * purpose: evaluates the QTCB of the finished FSF request
276 * and initiates appropriate actions
277 * (usually calling FSF command specific handlers)
278 *
279 * returns:
280 *
281 * context:
282 *
283 * locks:
284 */
285static int
286zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
287{
288 int retval = 0;
289 struct zfcp_adapter *adapter = fsf_req->adapter;
8a36e453
MS		 290 struct fsf_qtcb *qtcb = fsf_req->qtcb;
291 union fsf_prot_status_qual *prot_status_qual =
292 &qtcb->prefix.prot_status_qual;
1da177e4 293
8a36e453 294 zfcp_hba_dbf_event_fsf_response(fsf_req);
1da177e4
LT		 295
296 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
297 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
298 (unsigned long) fsf_req);
299 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
300 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
1da177e4
LT		 301 goto skip_protstatus;
302 }
303
304 /* log additional information provided by FSF (if any) */
8a36e453 305 if (unlikely(qtcb->header.log_length)) {
1da177e4 306 /* do not trust them ;-) */
8a36e453 307 if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
1da177e4
LT		 308 ZFCP_LOG_NORMAL
309 ("bug: ULP (FSF logging) log data starts "
310 "beyond end of packet header. Ignored. "
311 "(start=%i, size=%li)\n",
8a36e453 312 qtcb->header.log_start,
1da177e4
LT		 313 sizeof(struct fsf_qtcb));
314 goto forget_log;
315 }
8a36e453 316 if ((size_t) (qtcb->header.log_start + qtcb->header.log_length)
1da177e4
LT		 317 > sizeof(struct fsf_qtcb)) {
318 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
319 "beyond end of packet header. Ignored. "
320 "(start=%i, length=%i, size=%li)\n",
8a36e453
MS		 321 qtcb->header.log_start,
322 qtcb->header.log_length,
1da177e4
LT		 323 sizeof(struct fsf_qtcb));
324 goto forget_log;
325 }
326 ZFCP_LOG_TRACE("ULP log data: \n");
327 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
8a36e453
MS		 328 (char *) qtcb + qtcb->header.log_start,
329 qtcb->header.log_length);
1da177e4
LT		 330 }
331 forget_log:
332
333 /* evaluate FSF Protocol Status */
8a36e453 334 switch (qtcb->prefix.prot_status) {
1da177e4
LT		 335
336 case FSF_PROT_GOOD:
1da177e4 337 case FSF_PROT_FSF_STATUS_PRESENTED:
1da177e4
LT		 338 break;
339
340 case FSF_PROT_QTCB_VERSION_ERROR:
1da177e4
LT		 341 ZFCP_LOG_NORMAL("error: The adapter %s contains "
342 "microcode of version 0x%x, the device driver "
343 "only supports 0x%x. Aborting.\n",
344 zfcp_get_busid_by_adapter(adapter),
8a36e453
MS		 345 prot_status_qual->version_error.fsf_version,
346 ZFCP_QTCB_VERSION);
1da177e4 347 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 348 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
349 break;
350
351 case FSF_PROT_SEQ_NUMB_ERROR:
1da177e4
LT		 352 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
353 "driver (0x%x) and adapter %s (0x%x). "
354 "Restarting all operations on this adapter.\n",
8a36e453 355 qtcb->prefix.req_seq_no,
1da177e4 356 zfcp_get_busid_by_adapter(adapter),
8a36e453 357 prot_status_qual->sequence_error.exp_req_seq_no);
1da177e4 358 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 359 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
360 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
361 break;
362
363 case FSF_PROT_UNSUPP_QTCB_TYPE:
1da177e4
LT		 364 ZFCP_LOG_NORMAL("error: Packet header type used by the "
365 "device driver is incompatible with "
366 "that used on adapter %s. "
367 "Stopping all operations on this adapter.\n",
368 zfcp_get_busid_by_adapter(adapter));
1da177e4 369 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372
373 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
1da177e4
LT		 374 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
376 &(adapter->status));
1da177e4
LT		 377 break;
378
379 case FSF_PROT_DUPLICATE_REQUEST_ID:
1da177e4
LT		 380 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
381 "to the adapter %s is ambiguous. "
aef4a983
MS		 382 "Stopping all operations on this adapter.\n",
383 *(unsigned long long*)
384 (&qtcb->bottom.support.req_handle),
1da177e4 385 zfcp_get_busid_by_adapter(adapter));
1da177e4 386 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 387 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
388 break;
389
390 case FSF_PROT_LINK_DOWN:
aef4a983
MS		 391 zfcp_fsf_link_down_info_eval(adapter,
392 &prot_status_qual->link_down_info);
1da177e4
LT		 393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
394 break;
395
396 case FSF_PROT_REEST_QUEUE:
8a36e453 397 ZFCP_LOG_NORMAL("The local link to adapter with "
1da177e4
LT		 398 "%s was re-plugged. "
399 "Re-starting operations on this adapter.\n",
400 zfcp_get_busid_by_adapter(adapter));
401 /* All ports should be marked as ready to run again */
402 zfcp_erp_modify_adapter_status(adapter,
403 ZFCP_STATUS_COMMON_RUNNING,
404 ZFCP_SET);
405 zfcp_erp_adapter_reopen(adapter,
406 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
407 | ZFCP_STATUS_COMMON_ERP_FAILED);
1da177e4
LT		 408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
409 break;
410
411 case FSF_PROT_ERROR_STATE:
1da177e4
LT		 412 ZFCP_LOG_NORMAL("error: The adapter %s "
413 "has entered the error state. "
414 "Restarting all operations on this "
415 "adapter.\n",
416 zfcp_get_busid_by_adapter(adapter));
1da177e4 417 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 418 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
419 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
420 break;
421
422 default:
423 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
424 "provided by the adapter %s "
425 "is not compatible with the device driver. "
426 "Stopping all operations on this adapter. "
427 "(debug info 0x%x).\n",
428 zfcp_get_busid_by_adapter(adapter),
8a36e453 429 qtcb->prefix.prot_status);
1da177e4
LT		 430 zfcp_erp_adapter_shutdown(adapter, 0);
431 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
432 }
433
434 skip_protstatus:
435 /*
436 * always call specific handlers to give them a chance to do
437 * something meaningful even in error cases
438 */
439 zfcp_fsf_fsfstatus_eval(fsf_req);
440 return retval;
441}
442
443/*
444 * function: zfcp_fsf_fsfstatus_eval
445 *
446 * purpose: evaluates FSF status of completed FSF request
447 * and acts accordingly
448 *
449 * returns:
450 */
451static int
452zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
453{
454 int retval = 0;
455
456 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
457 goto skip_fsfstatus;
458 }
459
460 /* evaluate FSF Status */
461 switch (fsf_req->qtcb->header.fsf_status) {
462 case FSF_UNKNOWN_COMMAND:
1da177e4
LT		 463 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
464 "not known by the adapter %s "
465 "Stopping all operations on this adapter. "
466 "(debug info 0x%x).\n",
467 zfcp_get_busid_by_adapter(fsf_req->adapter),
468 fsf_req->qtcb->header.fsf_command);
1da177e4 469 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
1da177e4
LT		 470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
471 break;
472
473 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 474 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
475 "SCSI stack.\n");
1da177e4
LT		 476 break;
477
478 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 479 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
480 break;
1da177e4
LT		 481 }
482
483 skip_fsfstatus:
484 /*
485 * always call specific handlers to give them a chance to do
486 * something meaningful even in error cases
487 */
488 zfcp_fsf_req_dispatch(fsf_req);
489
490 return retval;
491}
492
493/*
494 * function: zfcp_fsf_fsfstatus_qual_eval
495 *
496 * purpose: evaluates FSF status-qualifier of completed FSF request
497 * and acts accordingly
498 *
499 * returns:
500 */
501static int
502zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
503{
504 int retval = 0;
505
506 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
507 case FSF_SQ_FCP_RSP_AVAILABLE:
1da177e4
LT		 508 break;
509 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4 510 /* The SCSI-stack may now issue retries or escalate */
1da177e4
LT		 511 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
512 break;
513 case FSF_SQ_COMMAND_ABORTED:
1da177e4 514 /* Carry the aborted state on to upper layer */
1da177e4
LT		 515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
517 break;
518 case FSF_SQ_NO_RECOM:
1da177e4
LT		 519 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
520 "problem on the adapter %s "
521 "Stopping all operations on this adapter. ",
522 zfcp_get_busid_by_adapter(fsf_req->adapter));
523 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
1da177e4
LT		 524 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
525 break;
526 case FSF_SQ_ULP_PROGRAMMING_ERROR:
1da177e4
LT		 527 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
528 "(adapter %s)\n",
529 zfcp_get_busid_by_adapter(fsf_req->adapter));
1da177e4
LT		 530 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
531 break;
532 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
533 case FSF_SQ_NO_RETRY_POSSIBLE:
534 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
535 /* dealt with in the respective functions */
536 break;
537 default:
538 ZFCP_LOG_NORMAL("bug: Additional status info could "
539 "not be interpreted properly.\n");
540 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
541 (char *) &fsf_req->qtcb->header.fsf_status_qual,
542 sizeof (union fsf_status_qual));
1da177e4
LT		 543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
544 break;
545 }
546
547 return retval;
548}
549
aef4a983
MS		 550/**
551 * zfcp_fsf_link_down_info_eval - evaluate link down information block
552 */
553static void
554zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter,
555 struct fsf_link_down_info *link_down)
556{
557 switch (link_down->error_code) {
558 case FSF_PSQ_LINK_NO_LIGHT:
559 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
560 "(no light detected)\n",
561 zfcp_get_busid_by_adapter(adapter));
562 break;
563 case FSF_PSQ_LINK_WRAP_PLUG:
564 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
565 "(wrap plug detected)\n",
566 zfcp_get_busid_by_adapter(adapter));
567 break;
568 case FSF_PSQ_LINK_NO_FCP:
569 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
570 "(adjacent node on link does not support FCP)\n",
571 zfcp_get_busid_by_adapter(adapter));
572 break;
573 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
574 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
575 "(firmware update in progress)\n",
576 zfcp_get_busid_by_adapter(adapter));
577 break;
578 case FSF_PSQ_LINK_INVALID_WWPN:
579 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
580 "(duplicate or invalid WWPN detected)\n",
581 zfcp_get_busid_by_adapter(adapter));
582 break;
583 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
584 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
585 "(no support for NPIV by Fabric)\n",
586 zfcp_get_busid_by_adapter(adapter));
587 break;
588 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
589 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
590 "(out of resource in FCP daughtercard)\n",
591 zfcp_get_busid_by_adapter(adapter));
592 break;
593 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
594 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
595 "(out of resource in Fabric)\n",
596 zfcp_get_busid_by_adapter(adapter));
597 break;
598 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
599 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
600 "(unable to Fabric login)\n",
601 zfcp_get_busid_by_adapter(adapter));
602 break;
603 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
604 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
605 zfcp_get_busid_by_adapter(adapter));
606 break;
607 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
608 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
609 zfcp_get_busid_by_adapter(adapter));
610 break;
611 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
612 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
613 zfcp_get_busid_by_adapter(adapter));
614 break;
615 default:
616 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
617 "(warning: unknown reason code %d)\n",
618 zfcp_get_busid_by_adapter(adapter),
619 link_down->error_code);
620 }
621
622 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
623 ZFCP_LOG_DEBUG("Debug information to link down: "
624 "primary_status=0x%02x "
625 "ioerr_code=0x%02x "
626 "action_code=0x%02x "
627 "reason_code=0x%02x "
628 "explanation_code=0x%02x "
629 "vendor_specific_code=0x%02x\n",
630 link_down->primary_status,
631 link_down->ioerr_code,
632 link_down->action_code,
633 link_down->reason_code,
634 link_down->explanation_code,
635 link_down->vendor_specific_code);
636
637 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
638 &adapter->status)) {
639 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
640 &adapter->status);
641 switch (link_down->error_code) {
642 case FSF_PSQ_LINK_NO_LIGHT:
643 case FSF_PSQ_LINK_WRAP_PLUG:
644 case FSF_PSQ_LINK_NO_FCP:
645 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
646 zfcp_erp_adapter_reopen(adapter, 0);
647 break;
648 default:
649 zfcp_erp_adapter_failed(adapter);
650 }
651 }
652}
653
1da177e4
LT		 654/*
655 * function: zfcp_fsf_req_dispatch
656 *
657 * purpose: calls the appropriate command specific handler
658 *
659 * returns:
660 */
661static int
662zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
663{
664 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
665 struct zfcp_adapter *adapter = fsf_req->adapter;
666 int retval = 0;
667
1da177e4
LT		 668
669 switch (fsf_req->fsf_command) {
670
671 case FSF_QTCB_FCP_CMND:
1da177e4
LT		 672 zfcp_fsf_send_fcp_command_handler(fsf_req);
673 break;
674
675 case FSF_QTCB_ABORT_FCP_CMND:
1da177e4
LT		 676 zfcp_fsf_abort_fcp_command_handler(fsf_req);
677 break;
678
679 case FSF_QTCB_SEND_GENERIC:
1da177e4
LT		 680 zfcp_fsf_send_ct_handler(fsf_req);
681 break;
682
683 case FSF_QTCB_OPEN_PORT_WITH_DID:
1da177e4
LT		 684 zfcp_fsf_open_port_handler(fsf_req);
685 break;
686
687 case FSF_QTCB_OPEN_LUN:
1da177e4
LT		 688 zfcp_fsf_open_unit_handler(fsf_req);
689 break;
690
691 case FSF_QTCB_CLOSE_LUN:
1da177e4
LT		 692 zfcp_fsf_close_unit_handler(fsf_req);
693 break;
694
695 case FSF_QTCB_CLOSE_PORT:
1da177e4
LT		 696 zfcp_fsf_close_port_handler(fsf_req);
697 break;
698
699 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
1da177e4
LT		 700 zfcp_fsf_close_physical_port_handler(fsf_req);
701 break;
702
703 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
1da177e4
LT		 704 zfcp_fsf_exchange_config_data_handler(fsf_req);
705 break;
706
707 case FSF_QTCB_EXCHANGE_PORT_DATA:
1da177e4
LT		 708 zfcp_fsf_exchange_port_data_handler(fsf_req);
709 break;
710
711 case FSF_QTCB_SEND_ELS:
1da177e4
LT		 712 zfcp_fsf_send_els_handler(fsf_req);
713 break;
714
715 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
1da177e4
LT		 716 zfcp_fsf_control_file_handler(fsf_req);
717 break;
718
719 case FSF_QTCB_UPLOAD_CONTROL_FILE:
1da177e4
LT		 720 zfcp_fsf_control_file_handler(fsf_req);
721 break;
722
723 default:
1da177e4
LT		 724 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
725 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
726 "not supported by the adapter %s\n",
8a36e453 727 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 728 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
729 ZFCP_LOG_NORMAL
730 ("bug: Command issued by the device driver differs "
731 "from the command returned by the adapter %s "
732 "(debug info 0x%x, 0x%x).\n",
8a36e453 733 zfcp_get_busid_by_adapter(adapter),
1da177e4
LT		 734 fsf_req->fsf_command,
735 fsf_req->qtcb->header.fsf_command);
736 }
737
738 if (!erp_action)
739 return retval;
740
1da177e4
LT		 741 zfcp_erp_async_handler(erp_action, 0);
742
743 return retval;
744}
745
746/*
747 * function: zfcp_fsf_status_read
748 *
749 * purpose: initiates a Status Read command at the specified adapter
750 *
751 * returns:
752 */
753int
754zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
755{
756 struct zfcp_fsf_req *fsf_req;
757 struct fsf_status_read_buffer *status_buffer;
758 unsigned long lock_flags;
759 volatile struct qdio_buffer_element *sbale;
760 int retval = 0;
761
762 /* setup new FSF request */
763 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
764 req_flags | ZFCP_REQ_NO_QTCB,
765 adapter->pool.fsf_req_status_read,
766 &lock_flags, &fsf_req);
767 if (retval < 0) {
768 ZFCP_LOG_INFO("error: Could not create unsolicited status "
769 "buffer for adapter %s.\n",
770 zfcp_get_busid_by_adapter(adapter));
771 goto failed_req_create;
772 }
773
774 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
775 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
776 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
777 fsf_req->sbale_curr = 2;
778
779 status_buffer =
780 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
781 if (!status_buffer) {
782 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
783 goto failed_buf;
784 }
785 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
059c97d0 786 fsf_req->data = (unsigned long) status_buffer;
1da177e4
LT		 787
788 /* insert pointer to respective buffer */
789 sbale = zfcp_qdio_sbale_curr(fsf_req);
790 sbale->addr = (void *) status_buffer;
791 sbale->length = sizeof(struct fsf_status_read_buffer);
792
793 /* start QDIO request for this FSF request */
794 retval = zfcp_fsf_req_send(fsf_req, NULL);
795 if (retval) {
796 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
797 "environment.\n");
798 goto failed_req_send;
799 }
800
801 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
802 zfcp_get_busid_by_adapter(adapter));
803 goto out;
804
805 failed_req_send:
806 mempool_free(status_buffer, adapter->pool.data_status_read);
807
808 failed_buf:
809 zfcp_fsf_req_free(fsf_req);
810 failed_req_create:
8a36e453 811 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
1da177e4
LT		 812 out:
813 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
814 return retval;
815}
816
817static int
818zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
819{
820 struct fsf_status_read_buffer *status_buffer;
821 struct zfcp_adapter *adapter;
822 struct zfcp_port *port;
823 unsigned long flags;
824
059c97d0 825 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 826 adapter = fsf_req->adapter;
827
828 read_lock_irqsave(&zfcp_data.config_lock, flags);
829 list_for_each_entry(port, &adapter->port_list_head, list)
830 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
831 break;
832 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
833
834 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
835 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
836 "nonexisting port with d_id 0x%08x on "
837 "adapter %s. Ignored.\n",
838 status_buffer->d_id & ZFCP_DID_MASK,
839 zfcp_get_busid_by_adapter(adapter));
840 goto out;
841 }
842
843 switch (status_buffer->status_subtype) {
844
845 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
1da177e4
LT		 846 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
847 zfcp_erp_port_reopen(port, 0);
848 break;
849
850 case FSF_STATUS_READ_SUB_ERROR_PORT:
1da177e4
LT		 851 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
852 zfcp_erp_port_shutdown(port, 0);
853 break;
854
855 default:
856 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
857 debug_exception(adapter->erp_dbf, 0,
858 &status_buffer->status_subtype, sizeof (u32));
859 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
860 "for a reopen indication on port with "
861 "d_id 0x%08x on the adapter %s. "
862 "Ignored. (debug info 0x%x)\n",
863 status_buffer->d_id,
864 zfcp_get_busid_by_adapter(adapter),
865 status_buffer->status_subtype);
866 }
867 out:
868 return 0;
869}
870
871/*
872 * function: zfcp_fsf_status_read_handler
873 *
874 * purpose: is called for finished Open Port command
875 *
876 * returns:
877 */
878static int
879zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
880{
881 int retval = 0;
882 struct zfcp_adapter *adapter = fsf_req->adapter;
883 struct fsf_status_read_buffer *status_buffer =
059c97d0 884 (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 885
886 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
8a36e453 887 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
1da177e4 888 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 889 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 890 goto out;
891 }
892
8a36e453
MS		 893 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
894
1da177e4
LT		 895 switch (status_buffer->status_type) {
896
897 case FSF_STATUS_READ_PORT_CLOSED:
1da177e4
LT		 898 zfcp_fsf_status_read_port_closed(fsf_req);
899 break;
900
901 case FSF_STATUS_READ_INCOMING_ELS:
1da177e4
LT		 902 zfcp_fsf_incoming_els(fsf_req);
903 break;
904
905 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4
LT		 906 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
907 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 908 break;
909
910 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
1da177e4
LT		 911 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
912 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
913 (char *) status_buffer,
914 sizeof (struct fsf_status_read_buffer));
915 break;
916
917 case FSF_STATUS_READ_LINK_DOWN:
aef4a983
MS		 918 switch (status_buffer->status_subtype) {
919 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
920 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
921 zfcp_get_busid_by_adapter(adapter));
922 break;
923 case FSF_STATUS_READ_SUB_FDISC_FAILED:
924 ZFCP_LOG_INFO("Local link to adapter %s is down "
925 "due to failed FDISC login\n",
1da177e4 926 zfcp_get_busid_by_adapter(adapter));
aef4a983
MS		 927 break;
928 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
929 ZFCP_LOG_INFO("Local link to adapter %s is down "
930 "due to firmware update on adapter\n",
931 zfcp_get_busid_by_adapter(adapter));
932 break;
933 default:
934 ZFCP_LOG_INFO("Local link to adapter %s is down "
935 "due to unknown reason\n",
936 zfcp_get_busid_by_adapter(adapter));
937 };
938 zfcp_fsf_link_down_info_eval(adapter,
939 (struct fsf_link_down_info *) &status_buffer->payload);
1da177e4
LT		 940 break;
941
942 case FSF_STATUS_READ_LINK_UP:
aef4a983 943 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
1da177e4
LT		 944 "Restarting operations on this adapter\n",
945 zfcp_get_busid_by_adapter(adapter));
946 /* All ports should be marked as ready to run again */
947 zfcp_erp_modify_adapter_status(adapter,
948 ZFCP_STATUS_COMMON_RUNNING,
949 ZFCP_SET);
950 zfcp_erp_adapter_reopen(adapter,
951 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
952 | ZFCP_STATUS_COMMON_ERP_FAILED);
953 break;
954
955 case FSF_STATUS_READ_CFDC_UPDATED:
8a36e453 956 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
1da177e4
LT		 957 zfcp_get_busid_by_adapter(adapter));
958 zfcp_erp_adapter_access_changed(adapter);
959 break;
960
961 case FSF_STATUS_READ_CFDC_HARDENED:
1da177e4
LT		 962 switch (status_buffer->status_subtype) {
963 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
8a36e453 964 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
1da177e4
LT		 965 zfcp_get_busid_by_adapter(adapter));
966 break;
967 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
8a36e453 968 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
1da177e4
LT		 969 "to the secondary SE\n",
970 zfcp_get_busid_by_adapter(adapter));
971 break;
972 default:
8a36e453 973 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
1da177e4
LT		 974 zfcp_get_busid_by_adapter(adapter));
975 }
976 break;
977
aef4a983
MS		 978 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
979 debug_text_event(adapter->erp_dbf, 2, "unsol_features:");
980 ZFCP_LOG_INFO("List of supported features on adapter %s has "
981 "been changed from 0x%08X to 0x%08X\n",
982 zfcp_get_busid_by_adapter(adapter),
983 *(u32*) (status_buffer->payload + 4),
984 *(u32*) (status_buffer->payload));
985 adapter->adapter_features = *(u32*) status_buffer->payload;
986 break;
987
1da177e4 988 default:
8a36e453 989 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1da177e4
LT		 990 "type was received (debug info 0x%x)\n",
991 status_buffer->status_type);
992 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
993 status_buffer);
994 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
995 (char *) status_buffer,
996 sizeof (struct fsf_status_read_buffer));
997 break;
998 }
999 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 1000 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 1001 /*
1002 * recycle buffer and start new request repeat until outbound
1003 * queue is empty or adapter shutdown is requested
1004 */
1005 /*
1006 * FIXME(qdio):
1007 * we may wait in the req_create for 5s during shutdown, so
1008 * qdio_cleanup will have to wait at least that long before returning
1009 * with failure to allow us a proper cleanup under all circumstances
1010 */
1011 /*
1012 * FIXME:
1013 * allocation failure possible? (Is this code needed?)
1014 */
1015 retval = zfcp_fsf_status_read(adapter, 0);
1016 if (retval < 0) {
1017 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1018 "request for the adapter %s.\n",
1019 zfcp_get_busid_by_adapter(adapter));
1020 /* temporary fix to avoid status read buffer shortage */
1021 adapter->status_read_failed++;
1022 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1023 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1024 ZFCP_LOG_INFO("restart adapter %s due to status read "
1025 "buffer shortage\n",
1026 zfcp_get_busid_by_adapter(adapter));
1027 zfcp_erp_adapter_reopen(adapter, 0);
1028 }
1029 }
1030 out:
1031 return retval;
1032}
1033
1034/*
1035 * function: zfcp_fsf_abort_fcp_command
1036 *
1037 * purpose: tells FSF to abort a running SCSI command
1038 *
1039 * returns: address of initiated FSF request
1040 * NULL - request could not be initiated
1041 *
1042 * FIXME(design): should be watched by a timeout !!!
1043 * FIXME(design) shouldn't this be modified to return an int
1044 * also...don't know how though
1045 */
1046struct zfcp_fsf_req *
1047zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1048 struct zfcp_adapter *adapter,
1049 struct zfcp_unit *unit, int req_flags)
1050{
1051 volatile struct qdio_buffer_element *sbale;
1052 unsigned long lock_flags;
1053 struct zfcp_fsf_req *fsf_req = NULL;
1054 int retval = 0;
1055
1056 /* setup new FSF request */
1057 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1058 req_flags, adapter->pool.fsf_req_abort,
1059 &lock_flags, &fsf_req);
1060 if (retval < 0) {
1061 ZFCP_LOG_INFO("error: Failed to create an abort command "
1062 "request for lun 0x%016Lx on port 0x%016Lx "
1063 "on adapter %s.\n",
1064 unit->fcp_lun,
1065 unit->port->wwpn,
1066 zfcp_get_busid_by_adapter(adapter));
1067 goto out;
1068 }
1069
1070 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1071 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1072 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1073
059c97d0 1074 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 1075
1076 /* set handles of unit and its parent port in QTCB */
1077 fsf_req->qtcb->header.lun_handle = unit->handle;
1078 fsf_req->qtcb->header.port_handle = unit->port->handle;
1079
1080 /* set handle of request which should be aborted */
1081 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1082
1083 /* start QDIO request for this FSF request */
1084
1085 zfcp_fsf_start_scsi_er_timer(adapter);
1086 retval = zfcp_fsf_req_send(fsf_req, NULL);
1087 if (retval) {
1088 del_timer(&adapter->scsi_er_timer);
1089 ZFCP_LOG_INFO("error: Failed to send abort command request "
1090 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1091 zfcp_get_busid_by_adapter(adapter),
1092 unit->port->wwpn, unit->fcp_lun);
1093 zfcp_fsf_req_free(fsf_req);
1094 fsf_req = NULL;
1095 goto out;
1096 }
1097
1098 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1099 "(adapter%s, port d_id=0x%08x, "
1100 "unit x%016Lx, old_req_id=0x%lx)\n",
1101 zfcp_get_busid_by_adapter(adapter),
1102 unit->port->d_id,
1103 unit->fcp_lun, old_req_id);
1104 out:
1105 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1106 return fsf_req;
1107}
1108
1109/*
1110 * function: zfcp_fsf_abort_fcp_command_handler
1111 *
1112 * purpose: is called for finished Abort FCP Command request
1113 *
1114 * returns:
1115 */
1116static int
1117zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1118{
1119 int retval = -EINVAL;
059c97d0 1120 struct zfcp_unit *unit;
1da177e4
LT		 1121 unsigned char status_qual =
1122 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1123
1124 del_timer(&new_fsf_req->adapter->scsi_er_timer);
1125
1126 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1127 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1128 goto skip_fsfstatus;
1129 }
1130
059c97d0
AH		 1131 unit = (struct zfcp_unit *) new_fsf_req->data;
1132
1da177e4
LT		 1133 /* evaluate FSF status in QTCB */
1134 switch (new_fsf_req->qtcb->header.fsf_status) {
1135
1136 case FSF_PORT_HANDLE_NOT_VALID:
1137 if (status_qual >> 4 != status_qual % 0xf) {
1da177e4
LT		 1138 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1139 "fsf_s_phand_nv0");
1140 /*
1141 * In this case a command that was sent prior to a port
1142 * reopen was aborted (handles are different). This is
1143 * fine.
1144 */
1145 } else {
1da177e4
LT		 1146 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1147 "port 0x%016Lx on adapter %s invalid. "
1148 "This may happen occasionally.\n",
1149 unit->port->handle,
1150 unit->port->wwpn,
1151 zfcp_get_busid_by_unit(unit));
1152 ZFCP_LOG_INFO("status qualifier:\n");
1153 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1154 (char *) &new_fsf_req->qtcb->header.
1155 fsf_status_qual,
1156 sizeof (union fsf_status_qual));
1157 /* Let's hope this sorts out the mess */
1158 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1159 "fsf_s_phand_nv1");
1160 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1161 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1162 }
1163 break;
1164
1165 case FSF_LUN_HANDLE_NOT_VALID:
1166 if (status_qual >> 4 != status_qual % 0xf) {
1167 /* 2 */
1da177e4
LT		 1168 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1169 "fsf_s_lhand_nv0");
1170 /*
1171 * In this case a command that was sent prior to a unit
1172 * reopen was aborted (handles are different).
1173 * This is fine.
1174 */
1175 } else {
1da177e4
LT		 1176 ZFCP_LOG_INFO
1177 ("Warning: Temporary LUN identifier 0x%x of LUN "
1178 "0x%016Lx on port 0x%016Lx on adapter %s is "
1179 "invalid. This may happen in rare cases. "
1180 "Trying to re-establish link.\n",
1181 unit->handle,
1182 unit->fcp_lun,
1183 unit->port->wwpn,
1184 zfcp_get_busid_by_unit(unit));
1185 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1186 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1187 (char *) &new_fsf_req->qtcb->header.
1188 fsf_status_qual,
1189 sizeof (union fsf_status_qual));
1190 /* Let's hope this sorts out the mess */
1191 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1192 "fsf_s_lhand_nv1");
1193 zfcp_erp_port_reopen(unit->port, 0);
1194 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1195 }
1196 break;
1197
1198 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1da177e4
LT		 1199 retval = 0;
1200 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1201 "fsf_s_no_exist");
1202 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1203 break;
1204
1205 case FSF_PORT_BOXED:
1da177e4
LT		 1206 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1207 "be reopened\n", unit->port->wwpn,
1208 zfcp_get_busid_by_unit(unit));
1209 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1210 "fsf_s_pboxed");
d736a27b 1211 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 1212 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1213 | ZFCP_STATUS_FSFREQ_RETRY;
1214 break;
1215
1216 case FSF_LUN_BOXED:
1da177e4
LT		 1217 ZFCP_LOG_INFO(
1218 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1219 "to be reopened\n",
1220 unit->fcp_lun, unit->port->wwpn,
1221 zfcp_get_busid_by_unit(unit));
1222 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 1223 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 1224 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1225 | ZFCP_STATUS_FSFREQ_RETRY;
1226 break;
1227
1228 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1229 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1230 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1231 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1232 "fsf_sq_ltest");
65a8d4e1 1233 zfcp_test_link(unit->port);
1da177e4
LT		 1234 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1235 break;
1236 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1237 /* SCSI stack will escalate */
1238 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1239 "fsf_sq_ulp");
1240 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1241 break;
1242 default:
1243 ZFCP_LOG_NORMAL
1244 ("bug: Wrong status qualifier 0x%x arrived.\n",
1245 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1246 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1247 "fsf_sq_inval:");
1248 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1249 &new_fsf_req->qtcb->header.
1250 fsf_status_qual.word[0], sizeof (u32));
1251 break;
1252 }
1253 break;
1254
1255 case FSF_GOOD:
1da177e4
LT		 1256 retval = 0;
1257 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1258 break;
1259
1260 default:
1261 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1262 "(debug info 0x%x)\n",
1263 new_fsf_req->qtcb->header.fsf_status);
1264 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1265 "fsf_s_inval:");
1266 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1267 &new_fsf_req->qtcb->header.fsf_status,
1268 sizeof (u32));
1269 break;
1270 }
1271 skip_fsfstatus:
1272 return retval;
1273}
1274
1275/**
1276 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1277 * one SBALE
1278 * Two scatter-gather lists are passed, one for the reqeust and one for the
1279 * response.
1280 */
1281static inline int
1282zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1283 struct scatterlist *resp, int resp_count)
1284{
1285 return ((req_count == 1) &&
1286 (resp_count == 1) &&
1287 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1288 PAGE_MASK) ==
1289 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1290 req[0].length - 1) & PAGE_MASK)) &&
1291 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1292 PAGE_MASK) ==
1293 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1294 resp[0].length - 1) & PAGE_MASK)));
1295}
1296
1297/**
1298 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1299 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1300 * the request
1301 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1302 * a struct zfcp_fsf_req
1303 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1304 * is sent within error recovery
1305 */
1306int
1307zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1308 struct zfcp_erp_action *erp_action)
1309{
1310 volatile struct qdio_buffer_element *sbale;
1311 struct zfcp_port *port;
1312 struct zfcp_adapter *adapter;
1313 struct zfcp_fsf_req *fsf_req;
1314 unsigned long lock_flags;
1315 int bytes;
1316 int ret = 0;
1317
1318 port = ct->port;
1319 adapter = port->adapter;
1320
1321 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1322 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1323 pool, &lock_flags, &fsf_req);
1324 if (ret < 0) {
1325 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1326 "adapter: %s\n",
1327 zfcp_get_busid_by_adapter(adapter));
1328 goto failed_req;
1329 }
1330
1331 if (erp_action != NULL) {
1332 erp_action->fsf_req = fsf_req;
1333 fsf_req->erp_action = erp_action;
1334 }
1335
1336 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1337 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1338 ct->resp, ct->resp_count)){
1339 /* both request buffer and response buffer
1340 fit into one sbale each */
1341 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1342 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1343 sbale[2].length = ct->req[0].length;
1344 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1345 sbale[3].length = ct->resp[0].length;
1346 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1347 } else if (adapter->adapter_features &
1da177e4
LT		 1348 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1349 /* try to use chained SBALs */
1350 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1351 SBAL_FLAGS0_TYPE_WRITE_READ,
1352 ct->req, ct->req_count,
1353 ZFCP_MAX_SBALS_PER_CT_REQ);
1354 if (bytes <= 0) {
1355 ZFCP_LOG_INFO("error: creation of CT request failed "
1356 "on adapter %s\n",
1357 zfcp_get_busid_by_adapter(adapter));
1358 if (bytes == 0)
1359 ret = -ENOMEM;
1360 else
1361 ret = bytes;
1362
1363 goto failed_send;
1364 }
1365 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1366 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1367 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1368 SBAL_FLAGS0_TYPE_WRITE_READ,
1369 ct->resp, ct->resp_count,
1370 ZFCP_MAX_SBALS_PER_CT_REQ);
1371 if (bytes <= 0) {
1372 ZFCP_LOG_INFO("error: creation of CT request failed "
1373 "on adapter %s\n",
1374 zfcp_get_busid_by_adapter(adapter));
1375 if (bytes == 0)
1376 ret = -ENOMEM;
1377 else
1378 ret = bytes;
1379
1380 goto failed_send;
1381 }
1382 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1383 } else {
1384 /* reject send generic request */
1385 ZFCP_LOG_INFO(
1386 "error: microcode does not support chained SBALs,"
1387 "CT request too big (adapter %s)\n",
1388 zfcp_get_busid_by_adapter(adapter));
1389 ret = -EOPNOTSUPP;
1390 goto failed_send;
1391 }
1392
1393 /* settings in QTCB */
1394 fsf_req->qtcb->header.port_handle = port->handle;
1395 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1396 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
059c97d0 1397 fsf_req->data = (unsigned long) ct;
1da177e4 1398
8a36e453
MS		 1399 zfcp_san_dbf_event_ct_request(fsf_req);
1400
1da177e4
LT		 1401 /* start QDIO request for this FSF request */
1402 ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1403 if (ret) {
1404 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1405 "(adapter %s, port 0x%016Lx)\n",
1406 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1407 goto failed_send;
1408 }
1409
1410 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1411 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1412 goto out;
1413
1414 failed_send:
1415 zfcp_fsf_req_free(fsf_req);
1416 if (erp_action != NULL) {
1417 erp_action->fsf_req = NULL;
1418 }
1419 failed_req:
1420 out:
1421 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1422 lock_flags);
1423 return ret;
1424}
1425
1426/**
1427 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1428 * @fsf_req: pointer to struct zfcp_fsf_req
1429 *
059c97d0
AH		 1430 * Data specific for the Generic Service request is passed using
1431 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1432 * Usually a specific handler for the CT request is called which is
1433 * found in this structure.
1da177e4
LT		 1434 */
1435static int
1436zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1437{
1438 struct zfcp_port *port;
1439 struct zfcp_adapter *adapter;
1440 struct zfcp_send_ct *send_ct;
1441 struct fsf_qtcb_header *header;
1442 struct fsf_qtcb_bottom_support *bottom;
1443 int retval = -EINVAL;
1444 u16 subtable, rule, counter;
1445
1446 adapter = fsf_req->adapter;
059c97d0 1447 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1da177e4
LT		 1448 port = send_ct->port;
1449 header = &fsf_req->qtcb->header;
1450 bottom = &fsf_req->qtcb->bottom.support;
1451
1452 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1453 goto skip_fsfstatus;
1454
1455 /* evaluate FSF status in QTCB */
1456 switch (header->fsf_status) {
1457
1458 case FSF_GOOD:
8a36e453 1459 zfcp_san_dbf_event_ct_response(fsf_req);
1da177e4
LT		 1460 retval = 0;
1461 break;
1462
1463 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 1464 if (adapter->fc_service_class <= 3) {
1465 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1466 "class %d.\n",
1467 zfcp_get_busid_by_port(port),
1468 adapter->fc_service_class);
1469 } else {
1470 ZFCP_LOG_INFO("bug: The fibre channel class at the "
1471 "adapter %s is invalid. "
1472 "(debug info %d)\n",
1473 zfcp_get_busid_by_port(port),
1474 adapter->fc_service_class);
1475 }
1476 /* stop operation for this adapter */
1477 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1478 zfcp_erp_adapter_shutdown(adapter, 0);
1479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1480 break;
1481
1482 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1483 switch (header->fsf_status_qual.word[0]){
1484 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1485 /* reopening link to port */
1486 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1487 zfcp_test_link(port);
1488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1489 break;
1490 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1491 /* ERP strategy will escalate */
1492 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1493 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1494 break;
1495 default:
1496 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1497 "arrived.\n",
1498 header->fsf_status_qual.word[0]);
1499 break;
1500 }
1501 break;
1502
1503 case FSF_ACCESS_DENIED:
1da177e4
LT		 1504 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1505 "command (adapter %s, port d_id=0x%08x)\n",
1506 zfcp_get_busid_by_port(port), port->d_id);
1507 for (counter = 0; counter < 2; counter++) {
1508 subtable = header->fsf_status_qual.halfword[counter * 2];
1509 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1510 switch (subtable) {
1511 case FSF_SQ_CFDC_SUBTABLE_OS:
1512 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1513 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1514 case FSF_SQ_CFDC_SUBTABLE_LUN:
1515 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1516 zfcp_act_subtable_type[subtable], rule);
1517 break;
1518 }
1519 }
1520 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1521 zfcp_erp_port_access_denied(port);
1522 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1523 break;
1524
1525 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4
LT		 1526 ZFCP_LOG_INFO("generic service command rejected "
1527 "(adapter %s, port d_id=0x%08x)\n",
1528 zfcp_get_busid_by_port(port), port->d_id);
1529 ZFCP_LOG_INFO("status qualifier:\n");
1530 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1531 (char *) &header->fsf_status_qual,
1532 sizeof (union fsf_status_qual));
1533 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1534 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1535 break;
1536
1537 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 1538 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1539 "0x%016Lx on adapter %s invalid. This may "
1540 "happen occasionally.\n", port->handle,
1541 port->wwpn, zfcp_get_busid_by_port(port));
1542 ZFCP_LOG_INFO("status qualifier:\n");
1543 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1544 (char *) &header->fsf_status_qual,
1545 sizeof (union fsf_status_qual));
1546 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1547 zfcp_erp_adapter_reopen(adapter, 0);
1548 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1549 break;
1550
1551 case FSF_PORT_BOXED:
1da177e4
LT		 1552 ZFCP_LOG_INFO("port needs to be reopened "
1553 "(adapter %s, port d_id=0x%08x)\n",
1554 zfcp_get_busid_by_port(port), port->d_id);
1555 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 1556 zfcp_erp_port_boxed(port);
1da177e4
LT		 1557 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1558 | ZFCP_STATUS_FSFREQ_RETRY;
1559 break;
1560
1561 /* following states should never occure, all cases avoided
1562 in zfcp_fsf_send_ct - but who knows ... */
1563 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1564 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1565 "req_buf_length=%d, resp_buf_length=%d)\n",
1566 zfcp_get_busid_by_adapter(adapter),
1567 bottom->req_buf_length, bottom->resp_buf_length);
1568 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1569 break;
1570 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1571 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1572 "req_buf_length=%d)\n",
1573 zfcp_get_busid_by_adapter(adapter),
1574 bottom->req_buf_length);
1575 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1576 break;
1577 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1578 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1579 "resp_buf_length=%d)\n",
1580 zfcp_get_busid_by_adapter(adapter),
1581 bottom->resp_buf_length);
1582 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1583 break;
1584 case FSF_SBAL_MISMATCH:
1da177e4
LT		 1585 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1586 "resp_buf_length=%d)\n",
1587 zfcp_get_busid_by_adapter(adapter),
1588 bottom->req_buf_length, bottom->resp_buf_length);
1589 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1590 break;
1591
1592 default:
1593 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1594 "(debug info 0x%x)\n", header->fsf_status);
1595 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1596 debug_exception(adapter->erp_dbf, 0,
1597 &header->fsf_status_qual.word[0], sizeof (u32));
1598 break;
1599 }
1600
1601skip_fsfstatus:
1602 send_ct->status = retval;
1603
1604 if (send_ct->handler != NULL)
1605 send_ct->handler(send_ct->handler_data);
1606
1607 return retval;
1608}
1609
1610/**
1611 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1612 * @els: pointer to struct zfcp_send_els which contains all needed data for
1613 * the command.
1614 */
1615int
1616zfcp_fsf_send_els(struct zfcp_send_els *els)
1617{
1618 volatile struct qdio_buffer_element *sbale;
1619 struct zfcp_fsf_req *fsf_req;
13e1e1f0 1620 u32 d_id;
1da177e4
LT		 1621 struct zfcp_adapter *adapter;
1622 unsigned long lock_flags;
1623 int bytes;
1624 int ret = 0;
1625
1626 d_id = els->d_id;
1627 adapter = els->adapter;
1628
1629 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1630 ZFCP_REQ_AUTO_CLEANUP,
1631 NULL, &lock_flags, &fsf_req);
1632 if (ret < 0) {
1633 ZFCP_LOG_INFO("error: creation of ELS request failed "
1634 "(adapter %s, port d_id: 0x%08x)\n",
1635 zfcp_get_busid_by_adapter(adapter), d_id);
1636 goto failed_req;
1637 }
1638
1639 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1640 if (zfcp_use_one_sbal(els->req, els->req_count,
1641 els->resp, els->resp_count)){
1642 /* both request buffer and response buffer
1643 fit into one sbale each */
1644 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1645 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1646 sbale[2].length = els->req[0].length;
1647 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1648 sbale[3].length = els->resp[0].length;
1649 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1650 } else if (adapter->adapter_features &
1da177e4
LT		 1651 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1652 /* try to use chained SBALs */
1653 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1654 SBAL_FLAGS0_TYPE_WRITE_READ,
1655 els->req, els->req_count,
1656 ZFCP_MAX_SBALS_PER_ELS_REQ);
1657 if (bytes <= 0) {
1658 ZFCP_LOG_INFO("error: creation of ELS request failed "
1659 "(adapter %s, port d_id: 0x%08x)\n",
1660 zfcp_get_busid_by_adapter(adapter), d_id);
1661 if (bytes == 0) {
1662 ret = -ENOMEM;
1663 } else {
1664 ret = bytes;
1665 }
1666 goto failed_send;
1667 }
1668 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1669 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1670 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1671 SBAL_FLAGS0_TYPE_WRITE_READ,
1672 els->resp, els->resp_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.resp_buf_length = bytes;
1686 } else {
1687 /* reject request */
1688 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1689 ", ELS request too big (adapter %s, "
1690 "port d_id: 0x%08x)\n",
1691 zfcp_get_busid_by_adapter(adapter), d_id);
1692 ret = -EOPNOTSUPP;
1693 goto failed_send;
1694 }
1695
1696 /* settings in QTCB */
1697 fsf_req->qtcb->bottom.support.d_id = d_id;
1698 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1699 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
059c97d0 1700 fsf_req->data = (unsigned long) els;
1da177e4
LT		 1701
1702 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1703
8a36e453
MS		 1704 zfcp_san_dbf_event_els_request(fsf_req);
1705
1da177e4
LT		 1706 /* start QDIO request for this FSF request */
1707 ret = zfcp_fsf_req_send(fsf_req, els->timer);
1708 if (ret) {
1709 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1710 "(adapter %s, port d_id: 0x%08x)\n",
1711 zfcp_get_busid_by_adapter(adapter), d_id);
1712 goto failed_send;
1713 }
1714
1715 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1716 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1717 goto out;
1718
1719 failed_send:
1720 zfcp_fsf_req_free(fsf_req);
1721
1722 failed_req:
1723 out:
1724 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1725 lock_flags);
1726
1727 return ret;
1728}
1729
1730/**
1731 * zfcp_fsf_send_els_handler - handler for ELS commands
1732 * @fsf_req: pointer to struct zfcp_fsf_req
1733 *
059c97d0
AH		 1734 * Data specific for the ELS command is passed using
1735 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1736 * Usually a specific handler for the ELS command is called which is
1737 * found in this structure.
1da177e4
LT		 1738 */
1739static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1740{
1741 struct zfcp_adapter *adapter;
1da177e4 1742 struct zfcp_port *port;
13e1e1f0 1743 u32 d_id;
1da177e4
LT		 1744 struct fsf_qtcb_header *header;
1745 struct fsf_qtcb_bottom_support *bottom;
1746 struct zfcp_send_els *send_els;
1747 int retval = -EINVAL;
1748 u16 subtable, rule, counter;
1749
059c97d0 1750 send_els = (struct zfcp_send_els *) fsf_req->data;
1da177e4 1751 adapter = send_els->adapter;
64b29a13 1752 port = send_els->port;
1da177e4
LT		 1753 d_id = send_els->d_id;
1754 header = &fsf_req->qtcb->header;
1755 bottom = &fsf_req->qtcb->bottom.support;
1756
1757 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1758 goto skip_fsfstatus;
1759
1760 switch (header->fsf_status) {
1761
1762 case FSF_GOOD:
8a36e453 1763 zfcp_san_dbf_event_els_response(fsf_req);
1da177e4
LT		 1764 retval = 0;
1765 break;
1766
1767 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 1768 if (adapter->fc_service_class <= 3) {
1769 ZFCP_LOG_INFO("error: adapter %s does "
1770 "not support fibrechannel class %d.\n",
1771 zfcp_get_busid_by_adapter(adapter),
1772 adapter->fc_service_class);
1773 } else {
1774 ZFCP_LOG_INFO("bug: The fibrechannel class at "
1775 "adapter %s is invalid. "
1776 "(debug info %d)\n",
1777 zfcp_get_busid_by_adapter(adapter),
1778 adapter->fc_service_class);
1779 }
1780 /* stop operation for this adapter */
1781 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1782 zfcp_erp_adapter_shutdown(adapter, 0);
1783 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1784 break;
1785
1786 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1787 switch (header->fsf_status_qual.word[0]){
1788 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1789 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
64b29a13
AH		 1790 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1791 zfcp_test_link(port);
1da177e4
LT		 1792 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1793 break;
1794 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1795 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1796 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1797 retval =
1798 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1799 (struct zfcp_ls_rjt_par *)
1800 &header->fsf_status_qual.word[2]);
1801 break;
1802 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 1803 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1804 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1805 break;
1806 default:
1807 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1808 header->fsf_status_qual.word[0]);
1809 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1810 (char*)header->fsf_status_qual.word, 16);
1811 }
1812 break;
1813
1814 case FSF_ELS_COMMAND_REJECTED:
1da177e4
LT		 1815 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1816 "prohibited sending "
1817 "(adapter: %s, port d_id: 0x%08x)\n",
1818 zfcp_get_busid_by_adapter(adapter), d_id);
1819
1820 break;
1821
1822 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1823 ZFCP_LOG_INFO(
1824 "ELS request size and ELS response size must be either "
1825 "both 0, or both greater than 0 "
1826 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1827 zfcp_get_busid_by_adapter(adapter),
1828 bottom->req_buf_length,
1829 bottom->resp_buf_length);
1830 break;
1831
1832 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1833 ZFCP_LOG_INFO(
1834 "Length of the ELS request buffer, "
1835 "specified in QTCB bottom, "
1836 "exceeds the size of the buffers "
1837 "that have been allocated for ELS request data "
1838 "(adapter: %s, req_buf_length=%d)\n",
1839 zfcp_get_busid_by_adapter(adapter),
1840 bottom->req_buf_length);
1841 break;
1842
1843 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1844 ZFCP_LOG_INFO(
1845 "Length of the ELS response buffer, "
1846 "specified in QTCB bottom, "
1847 "exceeds the size of the buffers "
1848 "that have been allocated for ELS response data "
1849 "(adapter: %s, resp_buf_length=%d)\n",
1850 zfcp_get_busid_by_adapter(adapter),
1851 bottom->resp_buf_length);
1852 break;
1853
1854 case FSF_SBAL_MISMATCH:
1855 /* should never occure, avoided in zfcp_fsf_send_els */
1da177e4
LT		 1856 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1857 "resp_buf_length=%d)\n",
1858 zfcp_get_busid_by_adapter(adapter),
1859 bottom->req_buf_length, bottom->resp_buf_length);
1860 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1861 break;
1862
1863 case FSF_ACCESS_DENIED:
1da177e4
LT		 1864 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1865 "(adapter %s, port d_id=0x%08x)\n",
1866 zfcp_get_busid_by_adapter(adapter), d_id);
1867 for (counter = 0; counter < 2; counter++) {
1868 subtable = header->fsf_status_qual.halfword[counter * 2];
1869 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1870 switch (subtable) {
1871 case FSF_SQ_CFDC_SUBTABLE_OS:
1872 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1873 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1874 case FSF_SQ_CFDC_SUBTABLE_LUN:
1875 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1876 zfcp_act_subtable_type[subtable], rule);
1877 break;
1878 }
1879 }
1880 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1da177e4
LT		 1881 if (port != NULL)
1882 zfcp_erp_port_access_denied(port);
1da177e4
LT		 1883 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1884 break;
1885
1886 default:
1887 ZFCP_LOG_NORMAL(
1888 "bug: An unknown FSF Status was presented "
1889 "(adapter: %s, fsf_status=0x%08x)\n",
1890 zfcp_get_busid_by_adapter(adapter),
1891 header->fsf_status);
1892 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1893 debug_exception(adapter->erp_dbf, 0,
1894 &header->fsf_status_qual.word[0], sizeof(u32));
1895 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1896 break;
1897 }
1898
1899skip_fsfstatus:
1900 send_els->status = retval;
1901
1902 if (send_els->handler != 0)
1903 send_els->handler(send_els->handler_data);
1904
1905 return retval;
1906}
1907
1908/*
1909 * function:
1910 *
1911 * purpose:
1912 *
1913 * returns: address of initiated FSF request
1914 * NULL - request could not be initiated
1915 */
1916int
1917zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1918{
1919 volatile struct qdio_buffer_element *sbale;
1920 unsigned long lock_flags;
1921 int retval = 0;
1922
1923 /* setup new FSF request */
1924 retval = zfcp_fsf_req_create(erp_action->adapter,
1925 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1926 ZFCP_REQ_AUTO_CLEANUP,
1927 erp_action->adapter->pool.fsf_req_erp,
1928 &lock_flags, &(erp_action->fsf_req));
1929 if (retval < 0) {
1930 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1931 "data request for adapter %s.\n",
1932 zfcp_get_busid_by_adapter(erp_action->adapter));
1933 goto out;
1934 }
1935
1936 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
1937 erp_action->fsf_req->sbal_curr, 0);
1938 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1939 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1940
1941 erp_action->fsf_req->erp_action = erp_action;
1942 erp_action->fsf_req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1943 FSF_FEATURE_CFDC |
1944 FSF_FEATURE_LUN_SHARING |
1945 FSF_FEATURE_UPDATE_ALERT;
1da177e4
LT		 1946
1947 /* start QDIO request for this FSF request */
1948 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
1949 if (retval) {
1950 ZFCP_LOG_INFO
1951 ("error: Could not send exchange configuration data "
1952 "command on the adapter %s\n",
1953 zfcp_get_busid_by_adapter(erp_action->adapter));
1954 zfcp_fsf_req_free(erp_action->fsf_req);
1955 erp_action->fsf_req = NULL;
1956 goto out;
1957 }
1958
1959 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1960 "(adapter %s)\n",
1961 zfcp_get_busid_by_adapter(erp_action->adapter));
1962
1963 out:
1964 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
1965 lock_flags);
1966 return retval;
1967}
1968
1969/**
1970 * zfcp_fsf_exchange_config_evaluate
1971 * @fsf_req: fsf_req which belongs to xchg config data request
1972 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1973 *
1974 * returns: -EIO on error, 0 otherwise
1975 */
1976static int
1977zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1978{
1979 struct fsf_qtcb_bottom_config *bottom;
1980 struct zfcp_adapter *adapter = fsf_req->adapter;
13e1e1f0 1981 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4
LT		 1982
1983 bottom = &fsf_req->qtcb->bottom.config;
1984 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
1985 bottom->low_qtcb_version, bottom->high_qtcb_version);
1986 adapter->fsf_lic_version = bottom->lic_version;
aef4a983
MS		 1987 adapter->adapter_features = bottom->adapter_features;
1988 adapter->connection_features = bottom->connection_features;
6f71d9bc
JB		 1989 adapter->peer_wwpn = 0;
1990 adapter->peer_wwnn = 0;
1991 adapter->peer_d_id = 0;
1da177e4
LT		 1992
1993 if (xchg_ok) {
13e1e1f0
AH		 1994 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
1995 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
1996 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
1997 fc_host_speed(shost) = bottom->fc_link_speed;
1998 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
1da177e4 1999 adapter->fc_topology = bottom->fc_topology;
1da177e4 2000 adapter->hydra_version = bottom->adapter_type;
aef4a983 2001 if (adapter->physical_wwpn == 0)
13e1e1f0 2002 adapter->physical_wwpn = fc_host_port_name(shost);
aef4a983 2003 if (adapter->physical_s_id == 0)
13e1e1f0 2004 adapter->physical_s_id = fc_host_port_id(shost);
1da177e4 2005 } else {
13e1e1f0
AH		 2006 fc_host_node_name(shost) = 0;
2007 fc_host_port_name(shost) = 0;
2008 fc_host_port_id(shost) = 0;
2009 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1da177e4 2010 adapter->fc_topology = 0;
1da177e4
LT		 2011 adapter->hydra_version = 0;
2012 }
2013
6f71d9bc
JB		 2014 if (adapter->fc_topology == FSF_TOPO_P2P) {
2015 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2016 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2017 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2018 }
2019
aef4a983 2020 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
1da177e4 2021 adapter->hardware_version = bottom->hardware_version;
13e1e1f0
AH		 2022 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2023 min(FC_SERIAL_NUMBER_SIZE, 17));
2024 EBCASC(fc_host_serial_number(shost),
2025 min(FC_SERIAL_NUMBER_SIZE, 17));
1da177e4
LT		 2026 }
2027
6f71d9bc 2028 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
13e1e1f0
AH		 2029 "WWNN 0x%016Lx, "
2030 "WWPN 0x%016Lx, "
2031 "S_ID 0x%08x,\n"
2032 "adapter version 0x%x, "
2033 "LIC version 0x%x, "
2034 "FC link speed %d Gb/s\n",
2035 zfcp_get_busid_by_adapter(adapter),
2036 (wwn_t) fc_host_node_name(shost),
2037 (wwn_t) fc_host_port_name(shost),
2038 fc_host_port_id(shost),
2039 adapter->hydra_version,
2040 adapter->fsf_lic_version,
2041 fc_host_speed(shost));
1da177e4
LT		 2042 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2043 ZFCP_LOG_NORMAL("error: the adapter %s "
2044 "only supports newer control block "
2045 "versions in comparison to this device "
2046 "driver (try updated device driver)\n",
2047 zfcp_get_busid_by_adapter(adapter));
2048 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2049 zfcp_erp_adapter_shutdown(adapter, 0);
2050 return -EIO;
2051 }
2052 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2053 ZFCP_LOG_NORMAL("error: the adapter %s "
2054 "only supports older control block "
2055 "versions than this device driver uses"
2056 "(consider a microcode upgrade)\n",
2057 zfcp_get_busid_by_adapter(adapter));
2058 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2059 zfcp_erp_adapter_shutdown(adapter, 0);
2060 return -EIO;
2061 }
2062 return 0;
2063}
2064
2065/*
2066 * function: zfcp_fsf_exchange_config_data_handler
2067 *
2068 * purpose: is called for finished Exchange Configuration Data command
2069 *
2070 * returns:
2071 */
2072static int
2073zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2074{
2075 struct fsf_qtcb_bottom_config *bottom;
2076 struct zfcp_adapter *adapter = fsf_req->adapter;
aef4a983 2077 struct fsf_qtcb *qtcb = fsf_req->qtcb;
1da177e4
LT		 2078
2079 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2080 return -EIO;
2081
aef4a983 2082 switch (qtcb->header.fsf_status) {
1da177e4
LT		 2083
2084 case FSF_GOOD:
1da177e4
LT		 2085 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2086 return -EIO;
2087
2088 switch (adapter->fc_topology) {
2089 case FSF_TOPO_P2P:
6f71d9bc
JB		 2090 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2091 "configuration detected at adapter %s\n"
2092 "Peer WWNN 0x%016llx, "
2093 "peer WWPN 0x%016llx, "
2094 "peer d_id 0x%06x\n",
2095 zfcp_get_busid_by_adapter(adapter),
2096 adapter->peer_wwnn,
2097 adapter->peer_wwpn,
2098 adapter->peer_d_id);
1da177e4
LT		 2099 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2100 "top-p-to-p");
6f71d9bc 2101 break;
1da177e4 2102 case FSF_TOPO_AL:
1da177e4
LT		 2103 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2104 "topology detected at adapter %s "
2105 "unsupported, shutting down adapter\n",
2106 zfcp_get_busid_by_adapter(adapter));
2107 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2108 "top-al");
2109 zfcp_erp_adapter_shutdown(adapter, 0);
2110 return -EIO;
2111 case FSF_TOPO_FABRIC:
aef4a983 2112 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
1da177e4
LT		 2113 "network detected at adapter %s.\n",
2114 zfcp_get_busid_by_adapter(adapter));
2115 break;
2116 default:
2117 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2118 "reported by the exchange "
2119 "configuration command for "
2120 "the adapter %s is not "
2121 "of a type known to the zfcp "
2122 "driver, shutting down adapter\n",
2123 zfcp_get_busid_by_adapter(adapter));
6f71d9bc 2124 adapter->fc_topology = FSF_TOPO_ERROR;
1da177e4
LT		 2125 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2126 "unknown-topo");
2127 zfcp_erp_adapter_shutdown(adapter, 0);
2128 return -EIO;
2129 }
aef4a983 2130 bottom = &qtcb->bottom.config;
1da177e4
LT		 2131 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2132 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2133 "allowed by the adapter %s "
2134 "is lower than the minimum "
2135 "required by the driver (%ld bytes).\n",
2136 bottom->max_qtcb_size,
2137 zfcp_get_busid_by_adapter(adapter),
2138 sizeof(struct fsf_qtcb));
2139 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2140 "qtcb-size");
2141 debug_event(fsf_req->adapter->erp_dbf, 0,
2142 &bottom->max_qtcb_size, sizeof (u32));
2143 zfcp_erp_adapter_shutdown(adapter, 0);
2144 return -EIO;
2145 }
2146 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2147 &adapter->status);
2148 break;
2149 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2150 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2151
2152 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2153 return -EIO;
2154
aef4a983
MS		 2155 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
2156
2157 zfcp_fsf_link_down_info_eval(adapter,
2158 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4
LT		 2159 break;
2160 default:
2161 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2162 debug_event(fsf_req->adapter->erp_dbf, 0,
2163 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2164 zfcp_erp_adapter_shutdown(adapter, 0);
2165 return -EIO;
2166 }
2167 return 0;
2168}
2169
2170/**
2171 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 2172 * @erp_action: ERP action for the adapter for which port data is requested
1da177e4
LT		 2173 * @adapter: for which port data is requested
2174 * @data: response to exchange port data request
2175 */
2176int
aef4a983
MS		 2177zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action,
2178 struct zfcp_adapter *adapter,
1da177e4
LT		 2179 struct fsf_qtcb_bottom_port *data)
2180{
2181 volatile struct qdio_buffer_element *sbale;
2182 int retval = 0;
2183 unsigned long lock_flags;
2184 struct zfcp_fsf_req *fsf_req;
2185 struct timer_list *timer;
2186
aef4a983 2187 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
1da177e4
LT		 2188 ZFCP_LOG_INFO("error: exchange port data "
2189 "command not supported by adapter %s\n",
2190 zfcp_get_busid_by_adapter(adapter));
2191 return -EOPNOTSUPP;
2192 }
2193
1da177e4
LT		 2194 /* setup new FSF request */
2195 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2448c459
AH		 2196 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0,
2197 0, &lock_flags, &fsf_req);
1da177e4
LT		 2198 if (retval < 0) {
2199 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2200 "exchange port data request for"
2201 "the adapter %s.\n",
2202 zfcp_get_busid_by_adapter(adapter));
2203 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2204 lock_flags);
2448c459 2205 return retval;
aef4a983
MS		 2206 }
2207
2208 if (data)
2448c459 2209 fsf_req->data = (unsigned long) data;
059c97d0 2210
1da177e4
LT		 2211 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2212 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2213 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2214
2448c459
AH		 2215 if (erp_action) {
2216 erp_action->fsf_req = fsf_req;
2217 fsf_req->erp_action = erp_action;
2218 timer = &erp_action->timer;
2219 } else {
2220 timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC);
2221 if (!timer) {
2222 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2223 lock_flags);
2224 zfcp_fsf_req_free(fsf_req);
2225 return -ENOMEM;
2226 }
2227 init_timer(timer);
2228 timer->function = zfcp_fsf_request_timeout_handler;
2229 timer->data = (unsigned long) adapter;
2230 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2231 }
1da177e4
LT		 2232
2233 retval = zfcp_fsf_req_send(fsf_req, timer);
2234 if (retval) {
2235 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2236 "command on the adapter %s\n",
2237 zfcp_get_busid_by_adapter(adapter));
2238 zfcp_fsf_req_free(fsf_req);
aef4a983
MS		 2239 if (erp_action)
2240 erp_action->fsf_req = NULL;
2448c459
AH		 2241 else
2242 kfree(timer);
1da177e4
LT		 2243 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2244 lock_flags);
2448c459 2245 return retval;
1da177e4
LT		 2246 }
2247
2448c459 2248 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1da177e4 2249
2448c459
AH		 2250 if (!erp_action) {
2251 wait_event(fsf_req->completion_wq,
2252 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2253 del_timer_sync(timer);
2254 zfcp_fsf_req_free(fsf_req);
2255 kfree(timer);
2256 }
1da177e4
LT		 2257 return retval;
2258}
2259
2260
2261/**
2262 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2263 * @fsf_req: pointer to struct zfcp_fsf_req
2264 */
2265static void
2266zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2267{
aef4a983 2268 struct zfcp_adapter *adapter = fsf_req->adapter;
13e1e1f0 2269 struct Scsi_Host *shost = adapter->scsi_host;
aef4a983
MS		 2270 struct fsf_qtcb *qtcb = fsf_req->qtcb;
2271 struct fsf_qtcb_bottom_port *bottom, *data;
1da177e4
LT		 2272
2273 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2274 return;
2275
aef4a983 2276 switch (qtcb->header.fsf_status) {
1da177e4 2277 case FSF_GOOD:
aef4a983
MS		 2278 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2279
2280 bottom = &qtcb->bottom.port;
2281 data = (struct fsf_qtcb_bottom_port*) fsf_req->data;
2282 if (data)
2283 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port));
2284 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
2285 adapter->physical_wwpn = bottom->wwpn;
2286 adapter->physical_s_id = bottom->fc_port_id;
2287 } else {
13e1e1f0
AH		 2288 adapter->physical_wwpn = fc_host_port_name(shost);
2289 adapter->physical_s_id = fc_host_port_id(shost);
aef4a983 2290 }
13e1e1f0 2291 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
aef4a983
MS		 2292 break;
2293
2294 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2295 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
2296
2297 zfcp_fsf_link_down_info_eval(adapter,
2298 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4
LT		 2299 break;
2300
2301 default:
aef4a983
MS		 2302 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");
2303 debug_event(adapter->erp_dbf, 0,
1da177e4
LT		 2304 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2305 }
2306}
2307
2308
2309/*
2310 * function: zfcp_fsf_open_port
2311 *
2312 * purpose:
2313 *
2314 * returns: address of initiated FSF request
2315 * NULL - request could not be initiated
2316 */
2317int
2318zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2319{
2320 volatile struct qdio_buffer_element *sbale;
2321 unsigned long lock_flags;
2322 int retval = 0;
2323
2324 /* setup new FSF request */
2325 retval = zfcp_fsf_req_create(erp_action->adapter,
2326 FSF_QTCB_OPEN_PORT_WITH_DID,
2327 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2328 erp_action->adapter->pool.fsf_req_erp,
2329 &lock_flags, &(erp_action->fsf_req));
2330 if (retval < 0) {
2331 ZFCP_LOG_INFO("error: Could not create open port request "
2332 "for port 0x%016Lx on adapter %s.\n",
2333 erp_action->port->wwpn,
2334 zfcp_get_busid_by_adapter(erp_action->adapter));
2335 goto out;
2336 }
2337
2338 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2339 erp_action->fsf_req->sbal_curr, 0);
2340 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2341 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2342
2343 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2344 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
059c97d0 2345 erp_action->fsf_req->data = (unsigned long) erp_action->port;
1da177e4
LT		 2346 erp_action->fsf_req->erp_action = erp_action;
2347
2348 /* start QDIO request for this FSF request */
2349 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2350 if (retval) {
2351 ZFCP_LOG_INFO("error: Could not send open port request for "
2352 "port 0x%016Lx on adapter %s.\n",
2353 erp_action->port->wwpn,
2354 zfcp_get_busid_by_adapter(erp_action->adapter));
2355 zfcp_fsf_req_free(erp_action->fsf_req);
2356 erp_action->fsf_req = NULL;
2357 goto out;
2358 }
2359
2360 ZFCP_LOG_DEBUG("open port request initiated "
2361 "(adapter %s, port 0x%016Lx)\n",
2362 zfcp_get_busid_by_adapter(erp_action->adapter),
2363 erp_action->port->wwpn);
2364 out:
2365 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2366 lock_flags);
2367 return retval;
2368}
2369
2370/*
2371 * function: zfcp_fsf_open_port_handler
2372 *
2373 * purpose: is called for finished Open Port command
2374 *
2375 * returns:
2376 */
2377static int
2378zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2379{
2380 int retval = -EINVAL;
2381 struct zfcp_port *port;
2382 struct fsf_plogi *plogi;
2383 struct fsf_qtcb_header *header;
2384 u16 subtable, rule, counter;
2385
059c97d0 2386 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2387 header = &fsf_req->qtcb->header;
2388
2389 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2390 /* don't change port status in our bookkeeping */
2391 goto skip_fsfstatus;
2392 }
2393
2394 /* evaluate FSF status in QTCB */
2395 switch (header->fsf_status) {
2396
2397 case FSF_PORT_ALREADY_OPEN:
1da177e4
LT		 2398 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2399 "is already open.\n",
2400 port->wwpn, zfcp_get_busid_by_port(port));
2401 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2402 "fsf_s_popen");
2403 /*
2404 * This is a bug, however operation should continue normally
2405 * if it is simply ignored
2406 */
2407 break;
2408
2409 case FSF_ACCESS_DENIED:
1da177e4
LT		 2410 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2411 "on adapter %s\n",
2412 port->wwpn, zfcp_get_busid_by_port(port));
2413 for (counter = 0; counter < 2; counter++) {
2414 subtable = header->fsf_status_qual.halfword[counter * 2];
2415 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2416 switch (subtable) {
2417 case FSF_SQ_CFDC_SUBTABLE_OS:
2418 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2419 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2420 case FSF_SQ_CFDC_SUBTABLE_LUN:
2421 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2422 zfcp_act_subtable_type[subtable], rule);
2423 break;
2424 }
2425 }
2426 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2427 zfcp_erp_port_access_denied(port);
2428 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2429 break;
2430
2431 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1da177e4
LT		 2432 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2433 "The remote port 0x%016Lx on adapter %s "
2434 "could not be opened. Disabling it.\n",
2435 port->wwpn, zfcp_get_busid_by_port(port));
2436 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2437 "fsf_s_max_ports");
2438 zfcp_erp_port_failed(port);
2439 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2440 break;
2441
2442 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2443 switch (header->fsf_status_qual.word[0]) {
2444 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2445 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2446 "fsf_sq_ltest");
2447 /* ERP strategy will escalate */
2448 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2449 break;
2450 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2451 /* ERP strategy will escalate */
2452 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2453 "fsf_sq_ulp");
2454 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2455 break;
2456 case FSF_SQ_NO_RETRY_POSSIBLE:
1da177e4
LT		 2457 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2458 "adapter %s could not be opened. "
2459 "Disabling it.\n",
2460 port->wwpn,
2461 zfcp_get_busid_by_port(port));
2462 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2463 "fsf_sq_no_retry");
2464 zfcp_erp_port_failed(port);
2465 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2466 break;
2467 default:
2468 ZFCP_LOG_NORMAL
2469 ("bug: Wrong status qualifier 0x%x arrived.\n",
2470 header->fsf_status_qual.word[0]);
2471 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2472 "fsf_sq_inval:");
2473 debug_exception(
2474 fsf_req->adapter->erp_dbf, 0,
2475 &header->fsf_status_qual.word[0],
2476 sizeof (u32));
2477 break;
2478 }
2479 break;
2480
2481 case FSF_GOOD:
1da177e4
LT		 2482 /* save port handle assigned by FSF */
2483 port->handle = header->port_handle;
2484 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2485 "was opened, it's port handle is 0x%x\n",
2486 port->wwpn, zfcp_get_busid_by_port(port),
2487 port->handle);
2488 /* mark port as open */
2489 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2490 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 2491 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2492 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2493 &port->status);
1da177e4
LT		 2494 retval = 0;
2495 /* check whether D_ID has changed during open */
2496 /*
2497 * FIXME: This check is not airtight, as the FCP channel does
2498 * not monitor closures of target port connections caused on
2499 * the remote side. Thus, they might miss out on invalidating
2500 * locally cached WWPNs (and other N_Port parameters) of gone
2501 * target ports. So, our heroic attempt to make things safe
2502 * could be undermined by 'open port' response data tagged with
2503 * obsolete WWPNs. Another reason to monitor potential
2504 * connection closures ourself at least (by interpreting
2505 * incoming ELS' and unsolicited status). It just crosses my
2506 * mind that one should be able to cross-check by means of
2507 * another GID_PN straight after a port has been opened.
2508 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2509 */
2510 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2511 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2512 {
2513 if (fsf_req->qtcb->bottom.support.els1_length <
2514 ((((unsigned long) &plogi->serv_param.wwpn) -
2515 ((unsigned long) plogi)) + sizeof (u64))) {
2516 ZFCP_LOG_INFO(
2517 "warning: insufficient length of "
2518 "PLOGI payload (%i)\n",
2519 fsf_req->qtcb->bottom.support.els1_length);
2520 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2521 "fsf_s_short_plogi:");
2522 /* skip sanity check and assume wwpn is ok */
2523 } else {
2524 if (plogi->serv_param.wwpn != port->wwpn) {
2525 ZFCP_LOG_INFO("warning: d_id of port "
2526 "0x%016Lx changed during "
2527 "open\n", port->wwpn);
2528 debug_text_event(
2529 fsf_req->adapter->erp_dbf, 0,
2530 "fsf_s_did_change:");
2531 atomic_clear_mask(
2532 ZFCP_STATUS_PORT_DID_DID,
2533 &port->status);
2534 } else
2535 port->wwnn = plogi->serv_param.wwnn;
2536 }
2537 }
2538 break;
2539
2540 case FSF_UNKNOWN_OP_SUBTYPE:
2541 /* should never occure, subtype not set in zfcp_fsf_open_port */
1da177e4
LT		 2542 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2543 "op_subtype=0x%x)\n",
2544 zfcp_get_busid_by_port(port),
2545 fsf_req->qtcb->bottom.support.operation_subtype);
2546 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2547 break;
2548
2549 default:
2550 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2551 "(debug info 0x%x)\n",
2552 header->fsf_status);
2553 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2554 debug_exception(fsf_req->adapter->erp_dbf, 0,
2555 &header->fsf_status, sizeof (u32));
2556 break;
2557 }
2558
2559 skip_fsfstatus:
2560 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2561 return retval;
2562}
2563
2564/*
2565 * function: zfcp_fsf_close_port
2566 *
2567 * purpose: submit FSF command "close port"
2568 *
2569 * returns: address of initiated FSF request
2570 * NULL - request could not be initiated
2571 */
2572int
2573zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2574{
2575 volatile struct qdio_buffer_element *sbale;
2576 unsigned long lock_flags;
2577 int retval = 0;
2578
2579 /* setup new FSF request */
2580 retval = zfcp_fsf_req_create(erp_action->adapter,
2581 FSF_QTCB_CLOSE_PORT,
2582 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2583 erp_action->adapter->pool.fsf_req_erp,
2584 &lock_flags, &(erp_action->fsf_req));
2585 if (retval < 0) {
2586 ZFCP_LOG_INFO("error: Could not create a close port request "
2587 "for port 0x%016Lx on adapter %s.\n",
2588 erp_action->port->wwpn,
2589 zfcp_get_busid_by_adapter(erp_action->adapter));
2590 goto out;
2591 }
2592
2593 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2594 erp_action->fsf_req->sbal_curr, 0);
2595 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2596 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2597
2598 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
059c97d0 2599 erp_action->fsf_req->data = (unsigned long) erp_action->port;
1da177e4
LT		 2600 erp_action->fsf_req->erp_action = erp_action;
2601 erp_action->fsf_req->qtcb->header.port_handle =
2602 erp_action->port->handle;
2603
2604 /* start QDIO request for this FSF request */
2605 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2606 if (retval) {
2607 ZFCP_LOG_INFO("error: Could not send a close port request for "
2608 "port 0x%016Lx on adapter %s.\n",
2609 erp_action->port->wwpn,
2610 zfcp_get_busid_by_adapter(erp_action->adapter));
2611 zfcp_fsf_req_free(erp_action->fsf_req);
2612 erp_action->fsf_req = NULL;
2613 goto out;
2614 }
2615
2616 ZFCP_LOG_TRACE("close port request initiated "
2617 "(adapter %s, port 0x%016Lx)\n",
2618 zfcp_get_busid_by_adapter(erp_action->adapter),
2619 erp_action->port->wwpn);
2620 out:
2621 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2622 lock_flags);
2623 return retval;
2624}
2625
2626/*
2627 * function: zfcp_fsf_close_port_handler
2628 *
2629 * purpose: is called for finished Close Port FSF command
2630 *
2631 * returns:
2632 */
2633static int
2634zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2635{
2636 int retval = -EINVAL;
2637 struct zfcp_port *port;
2638
059c97d0 2639 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2640
2641 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2642 /* don't change port status in our bookkeeping */
2643 goto skip_fsfstatus;
2644 }
2645
2646 /* evaluate FSF status in QTCB */
2647 switch (fsf_req->qtcb->header.fsf_status) {
2648
2649 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2650 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2651 "0x%016Lx on adapter %s invalid. This may happen "
2652 "occasionally.\n", port->handle,
2653 port->wwpn, zfcp_get_busid_by_port(port));
2654 ZFCP_LOG_DEBUG("status qualifier:\n");
2655 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2656 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2657 sizeof (union fsf_status_qual));
2658 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2659 "fsf_s_phand_nv");
2660 zfcp_erp_adapter_reopen(port->adapter, 0);
2661 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2662 break;
2663
2664 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2665 /* Note: FSF has actually closed the port in this case.
2666 * The status code is just daft. Fingers crossed for a change
2667 */
2668 retval = 0;
2669 break;
2670
2671 case FSF_GOOD:
1da177e4
LT		 2672 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2673 "port handle 0x%x\n", port->wwpn,
2674 zfcp_get_busid_by_port(port), port->handle);
2675 zfcp_erp_modify_port_status(port,
2676 ZFCP_STATUS_COMMON_OPEN,
2677 ZFCP_CLEAR);
2678 retval = 0;
2679 break;
2680
2681 default:
2682 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2683 "(debug info 0x%x)\n",
2684 fsf_req->qtcb->header.fsf_status);
2685 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2686 debug_exception(fsf_req->adapter->erp_dbf, 0,
2687 &fsf_req->qtcb->header.fsf_status,
2688 sizeof (u32));
2689 break;
2690 }
2691
2692 skip_fsfstatus:
2693 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2694 return retval;
2695}
2696
2697/*
2698 * function: zfcp_fsf_close_physical_port
2699 *
2700 * purpose: submit FSF command "close physical port"
2701 *
2702 * returns: address of initiated FSF request
2703 * NULL - request could not be initiated
2704 */
2705int
2706zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2707{
2708 int retval = 0;
2709 unsigned long lock_flags;
2710 volatile struct qdio_buffer_element *sbale;
2711
2712 /* setup new FSF request */
2713 retval = zfcp_fsf_req_create(erp_action->adapter,
2714 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2715 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2716 erp_action->adapter->pool.fsf_req_erp,
2717 &lock_flags, &erp_action->fsf_req);
2718 if (retval < 0) {
2719 ZFCP_LOG_INFO("error: Could not create close physical port "
2720 "request (adapter %s, port 0x%016Lx)\n",
2721 zfcp_get_busid_by_adapter(erp_action->adapter),
2722 erp_action->port->wwpn);
2723
2724 goto out;
2725 }
2726
2727 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2728 erp_action->fsf_req->sbal_curr, 0);
2729 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2730 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2731
2732 /* mark port as being closed */
2733 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2734 &erp_action->port->status);
2735 /* save a pointer to this port */
059c97d0 2736 erp_action->fsf_req->data = (unsigned long) erp_action->port;
aef4a983 2737 /* port to be closed */
1da177e4
LT		 2738 erp_action->fsf_req->qtcb->header.port_handle =
2739 erp_action->port->handle;
2740 erp_action->fsf_req->erp_action = erp_action;
2741
2742 /* start QDIO request for this FSF request */
2743 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2744 if (retval) {
2745 ZFCP_LOG_INFO("error: Could not send close physical port "
2746 "request (adapter %s, port 0x%016Lx)\n",
2747 zfcp_get_busid_by_adapter(erp_action->adapter),
2748 erp_action->port->wwpn);
2749 zfcp_fsf_req_free(erp_action->fsf_req);
2750 erp_action->fsf_req = NULL;
2751 goto out;
2752 }
2753
2754 ZFCP_LOG_TRACE("close physical port request initiated "
2755 "(adapter %s, port 0x%016Lx)\n",
2756 zfcp_get_busid_by_adapter(erp_action->adapter),
2757 erp_action->port->wwpn);
2758 out:
2759 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2760 lock_flags);
2761 return retval;
2762}
2763
2764/*
2765 * function: zfcp_fsf_close_physical_port_handler
2766 *
2767 * purpose: is called for finished Close Physical Port FSF command
2768 *
2769 * returns:
2770 */
2771static int
2772zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2773{
2774 int retval = -EINVAL;
2775 struct zfcp_port *port;
2776 struct zfcp_unit *unit;
2777 struct fsf_qtcb_header *header;
2778 u16 subtable, rule, counter;
2779
059c97d0 2780 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2781 header = &fsf_req->qtcb->header;
2782
2783 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2784 /* don't change port status in our bookkeeping */
2785 goto skip_fsfstatus;
2786 }
2787
2788 /* evaluate FSF status in QTCB */
2789 switch (header->fsf_status) {
2790
2791 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2792 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2793 "(adapter %s, port 0x%016Lx). "
2794 "This may happen occasionally.\n",
2795 port->handle,
2796 zfcp_get_busid_by_port(port),
2797 port->wwpn);
2798 ZFCP_LOG_DEBUG("status qualifier:\n");
2799 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2800 (char *) &header->fsf_status_qual,
2801 sizeof (union fsf_status_qual));
2802 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2803 "fsf_s_phand_nv");
2804 zfcp_erp_adapter_reopen(port->adapter, 0);
2805 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2806 break;
2807
2808 case FSF_ACCESS_DENIED:
1da177e4
LT		 2809 ZFCP_LOG_NORMAL("Access denied, cannot close "
2810 "physical port 0x%016Lx on adapter %s\n",
2811 port->wwpn, zfcp_get_busid_by_port(port));
2812 for (counter = 0; counter < 2; counter++) {
2813 subtable = header->fsf_status_qual.halfword[counter * 2];
2814 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2815 switch (subtable) {
2816 case FSF_SQ_CFDC_SUBTABLE_OS:
2817 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2818 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2819 case FSF_SQ_CFDC_SUBTABLE_LUN:
2820 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2821 zfcp_act_subtable_type[subtable], rule);
2822 break;
2823 }
2824 }
2825 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2826 zfcp_erp_port_access_denied(port);
2827 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2828 break;
2829
2830 case FSF_PORT_BOXED:
1da177e4
LT		 2831 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2832 "%s needs to be reopened but it was attempted "
2833 "to close it physically.\n",
2834 port->wwpn,
2835 zfcp_get_busid_by_port(port));
2836 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
d736a27b 2837 zfcp_erp_port_boxed(port);
1da177e4
LT		 2838 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2839 ZFCP_STATUS_FSFREQ_RETRY;
2840 break;
2841
2842 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2843 switch (header->fsf_status_qual.word[0]) {
2844 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2845 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2846 "fsf_sq_ltest");
2847 /* This will now be escalated by ERP */
2848 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2849 break;
2850 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 2851 /* ERP strategy will escalate */
2852 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2853 "fsf_sq_ulp");
2854 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2855 break;
2856 default:
2857 ZFCP_LOG_NORMAL
2858 ("bug: Wrong status qualifier 0x%x arrived.\n",
2859 header->fsf_status_qual.word[0]);
2860 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2861 "fsf_sq_inval:");
2862 debug_exception(
2863 fsf_req->adapter->erp_dbf, 0,
2864 &header->fsf_status_qual.word[0], sizeof (u32));
2865 break;
2866 }
2867 break;
2868
2869 case FSF_GOOD:
1da177e4
LT		 2870 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2871 "physically closed, port handle 0x%x\n",
2872 port->wwpn,
2873 zfcp_get_busid_by_port(port), port->handle);
2874 /* can't use generic zfcp_erp_modify_port_status because
2875 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2876 */
2877 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2878 list_for_each_entry(unit, &port->unit_list_head, list)
2879 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2880 retval = 0;
2881 break;
2882
2883 default:
2884 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2885 "(debug info 0x%x)\n",
2886 header->fsf_status);
2887 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2888 debug_exception(fsf_req->adapter->erp_dbf, 0,
2889 &header->fsf_status, sizeof (u32));
2890 break;
2891 }
2892
2893 skip_fsfstatus:
2894 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2895 return retval;
2896}
2897
2898/*
2899 * function: zfcp_fsf_open_unit
2900 *
2901 * purpose:
2902 *
2903 * returns:
2904 *
2905 * assumptions: This routine does not check whether the associated
2906 * remote port has already been opened. This should be
2907 * done by calling routines. Otherwise some status
2908 * may be presented by FSF
2909 */
2910int
2911zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2912{
2913 volatile struct qdio_buffer_element *sbale;
2914 unsigned long lock_flags;
2915 int retval = 0;
2916
2917 /* setup new FSF request */
2918 retval = zfcp_fsf_req_create(erp_action->adapter,
2919 FSF_QTCB_OPEN_LUN,
2920 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2921 erp_action->adapter->pool.fsf_req_erp,
2922 &lock_flags, &(erp_action->fsf_req));
2923 if (retval < 0) {
2924 ZFCP_LOG_INFO("error: Could not create open unit request for "
2925 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2926 erp_action->unit->fcp_lun,
2927 erp_action->unit->port->wwpn,
2928 zfcp_get_busid_by_adapter(erp_action->adapter));
2929 goto out;
2930 }
2931
2932 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2933 erp_action->fsf_req->sbal_curr, 0);
2934 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2935 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2936
2937 erp_action->fsf_req->qtcb->header.port_handle =
2938 erp_action->port->handle;
2939 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
2940 erp_action->unit->fcp_lun;
aef4a983 2941 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1da177e4
LT		 2942 erp_action->fsf_req->qtcb->bottom.support.option =
2943 FSF_OPEN_LUN_SUPPRESS_BOXING;
2944 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
059c97d0 2945 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
1da177e4
LT		 2946 erp_action->fsf_req->erp_action = erp_action;
2947
2948 /* start QDIO request for this FSF request */
2949 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2950 if (retval) {
2951 ZFCP_LOG_INFO("error: Could not send an open unit request "
2952 "on the adapter %s, port 0x%016Lx for "
2953 "unit 0x%016Lx\n",
2954 zfcp_get_busid_by_adapter(erp_action->adapter),
2955 erp_action->port->wwpn,
2956 erp_action->unit->fcp_lun);
2957 zfcp_fsf_req_free(erp_action->fsf_req);
2958 erp_action->fsf_req = NULL;
2959 goto out;
2960 }
2961
2962 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2963 "port 0x%016Lx, unit 0x%016Lx)\n",
2964 zfcp_get_busid_by_adapter(erp_action->adapter),
2965 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2966 out:
2967 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2968 lock_flags);
2969 return retval;
2970}
2971
2972/*
2973 * function: zfcp_fsf_open_unit_handler
2974 *
2975 * purpose: is called for finished Open LUN command
2976 *
2977 * returns:
2978 */
2979static int
2980zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2981{
2982 int retval = -EINVAL;
2983 struct zfcp_adapter *adapter;
2984 struct zfcp_unit *unit;
2985 struct fsf_qtcb_header *header;
2986 struct fsf_qtcb_bottom_support *bottom;
2987 struct fsf_queue_designator *queue_designator;
2988 u16 subtable, rule, counter;
aef4a983 2989 int exclusive, readwrite;
1da177e4 2990
059c97d0 2991 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 2992
2993 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2994 /* don't change unit status in our bookkeeping */
2995 goto skip_fsfstatus;
2996 }
2997
2998 adapter = fsf_req->adapter;
2999 header = &fsf_req->qtcb->header;
3000 bottom = &fsf_req->qtcb->bottom.support;
3001 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3002
1da177e4
LT		 3003 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3004 ZFCP_STATUS_UNIT_SHARED |
3005 ZFCP_STATUS_UNIT_READONLY,
3006 &unit->status);
3007
3008 /* evaluate FSF status in QTCB */
3009 switch (header->fsf_status) {
3010
3011 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3012 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3013 "for port 0x%016Lx on adapter %s invalid "
3014 "This may happen occasionally\n",
3015 unit->port->handle,
3016 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3017 ZFCP_LOG_DEBUG("status qualifier:\n");
3018 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3019 (char *) &header->fsf_status_qual,
3020 sizeof (union fsf_status_qual));
3021 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3022 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3023 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3024 break;
3025
3026 case FSF_LUN_ALREADY_OPEN:
1da177e4
LT		 3027 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3028 "remote port 0x%016Lx on adapter %s twice.\n",
3029 unit->fcp_lun,
3030 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3031 debug_text_exception(adapter->erp_dbf, 0,
3032 "fsf_s_uopen");
3033 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3034 break;
3035
3036 case FSF_ACCESS_DENIED:
1da177e4
LT		 3037 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3038 "remote port 0x%016Lx on adapter %s\n",
3039 unit->fcp_lun, unit->port->wwpn,
3040 zfcp_get_busid_by_unit(unit));
3041 for (counter = 0; counter < 2; counter++) {
3042 subtable = header->fsf_status_qual.halfword[counter * 2];
3043 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3044 switch (subtable) {
3045 case FSF_SQ_CFDC_SUBTABLE_OS:
3046 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3047 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3048 case FSF_SQ_CFDC_SUBTABLE_LUN:
3049 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3050 zfcp_act_subtable_type[subtable], rule);
3051 break;
3052 }
3053 }
3054 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3055 zfcp_erp_unit_access_denied(unit);
3056 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3057 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3058 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3059 break;
3060
3061 case FSF_PORT_BOXED:
1da177e4
LT		 3062 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3063 "needs to be reopened\n",
3064 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3065 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3066 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3067 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3068 ZFCP_STATUS_FSFREQ_RETRY;
3069 break;
3070
3071 case FSF_LUN_SHARING_VIOLATION:
1da177e4
LT		 3072 if (header->fsf_status_qual.word[0] != 0) {
3073 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3074 "with WWPN 0x%Lx "
3075 "connected to the adapter %s "
3076 "is already in use in LPAR%d, CSS%d\n",
3077 unit->fcp_lun,
3078 unit->port->wwpn,
3079 zfcp_get_busid_by_unit(unit),
3080 queue_designator->hla,
3081 queue_designator->cssid);
3082 } else {
3083 subtable = header->fsf_status_qual.halfword[4];
3084 rule = header->fsf_status_qual.halfword[5];
3085 switch (subtable) {
3086 case FSF_SQ_CFDC_SUBTABLE_OS:
3087 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3088 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3089 case FSF_SQ_CFDC_SUBTABLE_LUN:
3090 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3091 "remote port with WWPN 0x%Lx "
3092 "connected to the adapter %s "
3093 "is denied (%s rule %d)\n",
3094 unit->fcp_lun,
3095 unit->port->wwpn,
3096 zfcp_get_busid_by_unit(unit),
3097 zfcp_act_subtable_type[subtable],
3098 rule);
3099 break;
3100 }
3101 }
3102 ZFCP_LOG_DEBUG("status qualifier:\n");
3103 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3104 (char *) &header->fsf_status_qual,
3105 sizeof (union fsf_status_qual));
3106 debug_text_event(adapter->erp_dbf, 2,
3107 "fsf_s_l_sh_vio");
3108 zfcp_erp_unit_access_denied(unit);
3109 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3110 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3111 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3112 break;
3113
3114 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1da177e4
LT		 3115 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3116 "There is no handle (temporary port identifier) "
3117 "available for unit 0x%016Lx on port 0x%016Lx "
3118 "on adapter %s\n",
3119 unit->fcp_lun,
3120 unit->port->wwpn,
3121 zfcp_get_busid_by_unit(unit));
3122 debug_text_event(adapter->erp_dbf, 1,
3123 "fsf_s_max_units");
3124 zfcp_erp_unit_failed(unit);
3125 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3126 break;
3127
3128 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3129 switch (header->fsf_status_qual.word[0]) {
3130 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3131 /* Re-establish link to port */
3132 debug_text_event(adapter->erp_dbf, 1,
3133 "fsf_sq_ltest");
65a8d4e1 3134 zfcp_test_link(unit->port);
1da177e4
LT		 3135 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3136 break;
3137 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3138 /* ERP strategy will escalate */
3139 debug_text_event(adapter->erp_dbf, 1,
3140 "fsf_sq_ulp");
3141 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3142 break;
3143 default:
3144 ZFCP_LOG_NORMAL
3145 ("bug: Wrong status qualifier 0x%x arrived.\n",
3146 header->fsf_status_qual.word[0]);
3147 debug_text_event(adapter->erp_dbf, 0,
3148 "fsf_sq_inval:");
3149 debug_exception(adapter->erp_dbf, 0,
3150 &header->fsf_status_qual.word[0],
3151 sizeof (u32));
3152 }
3153 break;
3154
3155 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 3156 ZFCP_LOG_NORMAL(
3157 "Invalid option 0x%x has been specified "
3158 "in QTCB bottom sent to the adapter %s\n",
3159 bottom->option,
3160 zfcp_get_busid_by_adapter(adapter));
3161 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3162 retval = -EINVAL;
3163 break;
3164
3165 case FSF_GOOD:
1da177e4
LT		 3166 /* save LUN handle assigned by FSF */
3167 unit->handle = header->lun_handle;
3168 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3169 "adapter %s opened, port handle 0x%x\n",
3170 unit->fcp_lun,
3171 unit->port->wwpn,
3172 zfcp_get_busid_by_unit(unit),
3173 unit->handle);
3174 /* mark unit as open */
3175 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 3176
3177 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3178 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3179 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3180 exclusive = (bottom->lun_access_info &
3181 FSF_UNIT_ACCESS_EXCLUSIVE);
3182 readwrite = (bottom->lun_access_info &
3183 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3184
1da177e4
LT		 3185 if (!exclusive)
3186 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3187 &unit->status);
3188
3189 if (!readwrite) {
3190 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3191 &unit->status);
3192 ZFCP_LOG_NORMAL("read-only access for unit "
3193 "(adapter %s, wwpn=0x%016Lx, "
3194 "fcp_lun=0x%016Lx)\n",
3195 zfcp_get_busid_by_unit(unit),
3196 unit->port->wwpn,
3197 unit->fcp_lun);
3198 }
3199
3200 if (exclusive && !readwrite) {
3201 ZFCP_LOG_NORMAL("exclusive access of read-only "
3202 "unit not supported\n");
3203 zfcp_erp_unit_failed(unit);
3204 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3205 zfcp_erp_unit_shutdown(unit, 0);
3206 } else if (!exclusive && readwrite) {
3207 ZFCP_LOG_NORMAL("shared access of read-write "
3208 "unit not supported\n");
3209 zfcp_erp_unit_failed(unit);
3210 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3211 zfcp_erp_unit_shutdown(unit, 0);
3212 }
3213 }
3214
3215 retval = 0;
3216 break;
3217
3218 default:
3219 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3220 "(debug info 0x%x)\n",
3221 header->fsf_status);
3222 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3223 debug_exception(adapter->erp_dbf, 0,
3224 &header->fsf_status, sizeof (u32));
3225 break;
3226 }
3227
3228 skip_fsfstatus:
3229 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3230 return retval;
3231}
3232
3233/*
3234 * function: zfcp_fsf_close_unit
3235 *
3236 * purpose:
3237 *
3238 * returns: address of fsf_req - request successfully initiated
3239 * NULL -
3240 *
3241 * assumptions: This routine does not check whether the associated
3242 * remote port/lun has already been opened. This should be
3243 * done by calling routines. Otherwise some status
3244 * may be presented by FSF
3245 */
3246int
3247zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3248{
3249 volatile struct qdio_buffer_element *sbale;
3250 unsigned long lock_flags;
3251 int retval = 0;
3252
3253 /* setup new FSF request */
3254 retval = zfcp_fsf_req_create(erp_action->adapter,
3255 FSF_QTCB_CLOSE_LUN,
3256 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3257 erp_action->adapter->pool.fsf_req_erp,
3258 &lock_flags, &(erp_action->fsf_req));
3259 if (retval < 0) {
3260 ZFCP_LOG_INFO("error: Could not create close unit request for "
3261 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3262 erp_action->unit->fcp_lun,
3263 erp_action->port->wwpn,
3264 zfcp_get_busid_by_adapter(erp_action->adapter));
3265 goto out;
3266 }
3267
3268 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3269 erp_action->fsf_req->sbal_curr, 0);
3270 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3271 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3272
3273 erp_action->fsf_req->qtcb->header.port_handle =
3274 erp_action->port->handle;
3275 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3276 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
059c97d0 3277 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
1da177e4
LT		 3278 erp_action->fsf_req->erp_action = erp_action;
3279
3280 /* start QDIO request for this FSF request */
3281 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3282 if (retval) {
3283 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3284 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3285 erp_action->unit->fcp_lun,
3286 erp_action->port->wwpn,
3287 zfcp_get_busid_by_adapter(erp_action->adapter));
3288 zfcp_fsf_req_free(erp_action->fsf_req);
3289 erp_action->fsf_req = NULL;
3290 goto out;
3291 }
3292
3293 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3294 "port 0x%016Lx, unit 0x%016Lx)\n",
3295 zfcp_get_busid_by_adapter(erp_action->adapter),
3296 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3297 out:
3298 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3299 lock_flags);
3300 return retval;
3301}
3302
3303/*
3304 * function: zfcp_fsf_close_unit_handler
3305 *
3306 * purpose: is called for finished Close LUN FSF command
3307 *
3308 * returns:
3309 */
3310static int
3311zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3312{
3313 int retval = -EINVAL;
3314 struct zfcp_unit *unit;
3315
059c97d0 3316 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 3317
3318 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3319 /* don't change unit status in our bookkeeping */
3320 goto skip_fsfstatus;
3321 }
3322
3323 /* evaluate FSF status in QTCB */
3324 switch (fsf_req->qtcb->header.fsf_status) {
3325
3326 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3327 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3328 "0x%016Lx on adapter %s invalid. This may "
3329 "happen in rare circumstances\n",
3330 unit->port->handle,
3331 unit->port->wwpn,
3332 zfcp_get_busid_by_unit(unit));
3333 ZFCP_LOG_DEBUG("status qualifier:\n");
3334 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3335 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3336 sizeof (union fsf_status_qual));
3337 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3338 "fsf_s_phand_nv");
3339 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1da177e4
LT		 3340 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3341 break;
3342
3343 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3344 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3345 "0x%016Lx on port 0x%016Lx on adapter %s is "
3346 "invalid. This may happen occasionally.\n",
3347 unit->handle,
3348 unit->fcp_lun,
3349 unit->port->wwpn,
3350 zfcp_get_busid_by_unit(unit));
3351 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3352 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3353 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3354 sizeof (union fsf_status_qual));
3355 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3356 "fsf_s_lhand_nv");
3357 zfcp_erp_port_reopen(unit->port, 0);
1da177e4
LT		 3358 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3359 break;
3360
3361 case FSF_PORT_BOXED:
1da177e4
LT		 3362 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3363 "needs to be reopened\n",
3364 unit->port->wwpn,
3365 zfcp_get_busid_by_unit(unit));
3366 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3367 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3368 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3369 ZFCP_STATUS_FSFREQ_RETRY;
3370 break;
3371
3372 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3373 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3374 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3375 /* re-establish link to port */
3376 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3377 "fsf_sq_ltest");
65a8d4e1 3378 zfcp_test_link(unit->port);
1da177e4
LT		 3379 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3380 break;
3381 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3382 /* ERP strategy will escalate */
3383 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3384 "fsf_sq_ulp");
3385 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3386 break;
3387 default:
3388 ZFCP_LOG_NORMAL
3389 ("bug: Wrong status qualifier 0x%x arrived.\n",
3390 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3391 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3392 "fsf_sq_inval:");
3393 debug_exception(
3394 fsf_req->adapter->erp_dbf, 0,
3395 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3396 sizeof (u32));
3397 break;
3398 }
3399 break;
3400
3401 case FSF_GOOD:
1da177e4
LT		 3402 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3403 "closed, port handle 0x%x\n",
3404 unit->fcp_lun,
3405 unit->port->wwpn,
3406 zfcp_get_busid_by_unit(unit),
3407 unit->handle);
3408 /* mark unit as closed */
3409 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3410 retval = 0;
3411 break;
3412
3413 default:
3414 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3415 "(debug info 0x%x)\n",
3416 fsf_req->qtcb->header.fsf_status);
3417 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3418 debug_exception(fsf_req->adapter->erp_dbf, 0,
3419 &fsf_req->qtcb->header.fsf_status,
3420 sizeof (u32));
3421 break;
3422 }
3423
3424 skip_fsfstatus:
3425 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3426 return retval;
3427}
3428
3429/**
3430 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3431 * @adapter: adapter where scsi command is issued
3432 * @unit: unit where command is sent to
3433 * @scsi_cmnd: scsi command to be sent
3434 * @timer: timer to be started when request is initiated
3435 * @req_flags: flags for fsf_request
3436 */
3437int
3438zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3439 struct zfcp_unit *unit,
3440 struct scsi_cmnd * scsi_cmnd,
3441 struct timer_list *timer, int req_flags)
3442{
3443 struct zfcp_fsf_req *fsf_req = NULL;
3444 struct fcp_cmnd_iu *fcp_cmnd_iu;
3445 unsigned int sbtype;
3446 unsigned long lock_flags;
3447 int real_bytes = 0;
3448 int retval = 0;
3449 int mask;
3450
3451 /* setup new FSF request */
3452 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3453 adapter->pool.fsf_req_scsi,
3454 &lock_flags, &fsf_req);
3455 if (unlikely(retval < 0)) {
3456 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3457 "for unit 0x%016Lx on port 0x%016Lx on "
3458 "adapter %s\n",
3459 unit->fcp_lun,
3460 unit->port->wwpn,
3461 zfcp_get_busid_by_adapter(adapter));
3462 goto failed_req_create;
3463 }
3464
059c97d0
AH		 3465 zfcp_unit_get(unit);
3466 fsf_req->unit = unit;
1da177e4 3467
059c97d0
AH		 3468 /* associate FSF request with SCSI request (for look up on abort) */
3469 scsi_cmnd->host_scribble = (char *) fsf_req;
3470
3471 /* associate SCSI command with FSF request */
3472 fsf_req->data = (unsigned long) scsi_cmnd;
1da177e4
LT		 3473
3474 /* set handles of unit and its parent port in QTCB */
3475 fsf_req->qtcb->header.lun_handle = unit->handle;
3476 fsf_req->qtcb->header.port_handle = unit->port->handle;
3477
3478 /* FSF does not define the structure of the FCP_CMND IU */
3479 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3480 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3481
3482 /*
3483 * set depending on data direction:
3484 * data direction bits in SBALE (SB Type)
3485 * data direction bits in QTCB
3486 * data direction bits in FCP_CMND IU
3487 */
3488 switch (scsi_cmnd->sc_data_direction) {
3489 case DMA_NONE:
1da177e4
LT		 3490 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3491 /*
3492 * FIXME(qdio):
3493 * what is the correct type for commands
3494 * without 'real' data buffers?
3495 */
3496 sbtype = SBAL_FLAGS0_TYPE_READ;
3497 break;
3498 case DMA_FROM_DEVICE:
1da177e4
LT		 3499 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3500 sbtype = SBAL_FLAGS0_TYPE_READ;
3501 fcp_cmnd_iu->rddata = 1;
3502 break;
3503 case DMA_TO_DEVICE:
1da177e4
LT		 3504 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3505 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3506 fcp_cmnd_iu->wddata = 1;
3507 break;
3508 case DMA_BIDIRECTIONAL:
1da177e4
LT		 3509 default:
3510 /*
3511 * dummy, catch this condition earlier
3512 * in zfcp_scsi_queuecommand
3513 */
3514 goto failed_scsi_cmnd;
3515 }
3516
3517 /* set FC service class in QTCB (3 per default) */
3518 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3519
3520 /* set FCP_LUN in FCP_CMND IU in QTCB */
3521 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3522
3523 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3524
3525 /* set task attributes in FCP_CMND IU in QTCB */
3526 if (likely((scsi_cmnd->device->simple_tags) ||
3527 (atomic_test_mask(mask, &unit->status))))
3528 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3529 else
3530 fcp_cmnd_iu->task_attribute = UNTAGGED;
3531
3532 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3533 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3534 fcp_cmnd_iu->add_fcp_cdb_length
3535 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3536 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3537 "additional FCP_CDB length is 0x%x "
3538 "(shifted right 2 bits)\n",
3539 scsi_cmnd->cmd_len,
3540 fcp_cmnd_iu->add_fcp_cdb_length);
3541 }
3542 /*
3543 * copy SCSI CDB (including additional length, if any) to
3544 * FCP_CDB in FCP_CMND IU in QTCB
3545 */
3546 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3547
3548 /* FCP CMND IU length in QTCB */
3549 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3550 sizeof (struct fcp_cmnd_iu) +
3551 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3552
3553 /* generate SBALEs from data buffer */
3554 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3555 if (unlikely(real_bytes < 0)) {
3556 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3557 ZFCP_LOG_DEBUG(
3558 "Data did not fit into available buffer(s), "
3559 "waiting for more...\n");
3560 retval = -EIO;
3561 } else {
3562 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3563 "required. Shutting down unit "
3564 "(adapter %s, port 0x%016Lx, "
3565 "unit 0x%016Lx)\n",
3566 zfcp_get_busid_by_unit(unit),
3567 unit->port->wwpn,
3568 unit->fcp_lun);
3569 zfcp_erp_unit_shutdown(unit, 0);
3570 retval = -EINVAL;
3571 }
3572 goto no_fit;
3573 }
3574
3575 /* set length of FCP data length in FCP_CMND IU in QTCB */
3576 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3577
3578 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3579 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3580 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3581
3582 /*
3583 * start QDIO request for this FSF request
3584 * covered by an SBALE)
3585 */
3586 retval = zfcp_fsf_req_send(fsf_req, timer);
3587 if (unlikely(retval < 0)) {
3588 ZFCP_LOG_INFO("error: Could not send FCP command request "
3589 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3590 zfcp_get_busid_by_adapter(adapter),
3591 unit->port->wwpn,
3592 unit->fcp_lun);
3593 goto send_failed;
3594 }
3595
3596 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3597 "port 0x%016Lx, unit 0x%016Lx)\n",
3598 zfcp_get_busid_by_adapter(adapter),
3599 unit->port->wwpn,
3600 unit->fcp_lun);
3601 goto success;
3602
3603 send_failed:
3604 no_fit:
3605 failed_scsi_cmnd:
059c97d0 3606 zfcp_unit_put(unit);
1da177e4
LT		 3607 zfcp_fsf_req_free(fsf_req);
3608 fsf_req = NULL;
3609 scsi_cmnd->host_scribble = NULL;
3610 success:
3611 failed_req_create:
3612 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3613 return retval;
3614}
3615
3616/*
3617 * function: zfcp_fsf_send_fcp_command_task_management
3618 *
3619 * purpose:
3620 *
3621 * returns:
3622 *
3623 * FIXME(design): should be watched by a timeout!!!
3624 * FIXME(design) shouldn't this be modified to return an int
3625 * also...don't know how though
3626 *
3627 */
3628struct zfcp_fsf_req *
3629zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3630 struct zfcp_unit *unit,
3631 u8 tm_flags, int req_flags)
3632{
3633 struct zfcp_fsf_req *fsf_req = NULL;
3634 int retval = 0;
3635 struct fcp_cmnd_iu *fcp_cmnd_iu;
3636 unsigned long lock_flags;
3637 volatile struct qdio_buffer_element *sbale;
3638
3639 /* setup new FSF request */
3640 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3641 adapter->pool.fsf_req_scsi,
3642 &lock_flags, &fsf_req);
3643 if (retval < 0) {
3644 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3645 "management) request for adapter %s, port "
3646 " 0x%016Lx, unit 0x%016Lx.\n",
3647 zfcp_get_busid_by_adapter(adapter),
3648 unit->port->wwpn, unit->fcp_lun);
3649 goto out;
3650 }
3651
3652 /*
3653 * Used to decide on proper handler in the return path,
3654 * could be either zfcp_fsf_send_fcp_command_task_handler or
3655 * zfcp_fsf_send_fcp_command_task_management_handler */
3656
3657 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3658
3659 /*
3660 * hold a pointer to the unit being target of this
3661 * task management request
3662 */
059c97d0 3663 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 3664
3665 /* set FSF related fields in QTCB */
3666 fsf_req->qtcb->header.lun_handle = unit->handle;
3667 fsf_req->qtcb->header.port_handle = unit->port->handle;
3668 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3669 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3670 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3671 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3672
3673 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3674 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3675 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3676
3677 /* set FCP related fields in FCP_CMND IU in QTCB */
3678 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3679 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3680 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3681 fcp_cmnd_iu->task_management_flags = tm_flags;
3682
3683 /* start QDIO request for this FSF request */
3684 zfcp_fsf_start_scsi_er_timer(adapter);
3685 retval = zfcp_fsf_req_send(fsf_req, NULL);
3686 if (retval) {
3687 del_timer(&adapter->scsi_er_timer);
3688 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3689 "management) on adapter %s, port 0x%016Lx for "
3690 "unit LUN 0x%016Lx\n",
3691 zfcp_get_busid_by_adapter(adapter),
3692 unit->port->wwpn,
3693 unit->fcp_lun);
3694 zfcp_fsf_req_free(fsf_req);
3695 fsf_req = NULL;
3696 goto out;
3697 }
3698
3699 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3700 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3701 "tm_flags=0x%x)\n",
3702 zfcp_get_busid_by_adapter(adapter),
3703 unit->port->wwpn,
3704 unit->fcp_lun,
3705 tm_flags);
3706 out:
3707 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3708 return fsf_req;
3709}
3710
3711/*
3712 * function: zfcp_fsf_send_fcp_command_handler
3713 *
3714 * purpose: is called for finished Send FCP Command
3715 *
3716 * returns:
3717 */
3718static int
3719zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3720{
3721 int retval = -EINVAL;
3722 struct zfcp_unit *unit;
3723 struct fsf_qtcb_header *header;
3724 u16 subtable, rule, counter;
3725
3726 header = &fsf_req->qtcb->header;
3727
3728 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
059c97d0 3729 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 3730 else
059c97d0 3731 unit = fsf_req->unit;
1da177e4
LT		 3732
3733 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3734 /* go directly to calls of special handlers */
3735 goto skip_fsfstatus;
3736 }
3737
3738 /* evaluate FSF status in QTCB */
3739 switch (header->fsf_status) {
3740
3741 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3742 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3743 "0x%016Lx on adapter %s invalid\n",
3744 unit->port->handle,
3745 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3746 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3747 (char *) &header->fsf_status_qual,
3748 sizeof (union fsf_status_qual));
3749 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3750 "fsf_s_phand_nv");
3751 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3752 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3753 break;
3754
3755 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3756 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3757 "0x%016Lx on port 0x%016Lx on adapter %s is "
3758 "invalid. This may happen occasionally.\n",
3759 unit->handle,
3760 unit->fcp_lun,
3761 unit->port->wwpn,
3762 zfcp_get_busid_by_unit(unit));
3763 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3764 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3765 (char *) &header->fsf_status_qual,
3766 sizeof (union fsf_status_qual));
3767 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3768 "fsf_s_uhand_nv");
3769 zfcp_erp_port_reopen(unit->port, 0);
3770 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3771 break;
3772
3773 case FSF_HANDLE_MISMATCH:
1da177e4
LT		 3774 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3775 "unexpectedly. (adapter %s, port 0x%016Lx, "
3776 "unit 0x%016Lx)\n",
3777 unit->port->handle,
3778 zfcp_get_busid_by_unit(unit),
3779 unit->port->wwpn,
3780 unit->fcp_lun);
3781 ZFCP_LOG_NORMAL("status qualifier:\n");
3782 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3783 (char *) &header->fsf_status_qual,
3784 sizeof (union fsf_status_qual));
3785 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3786 "fsf_s_hand_mis");
3787 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1da177e4
LT		 3788 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3789 break;
3790
3791 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 3792 if (fsf_req->adapter->fc_service_class <= 3) {
3793 ZFCP_LOG_NORMAL("error: The adapter %s does "
3794 "not support fibrechannel class %d.\n",
3795 zfcp_get_busid_by_unit(unit),
3796 fsf_req->adapter->fc_service_class);
3797 } else {
3798 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3799 "adapter %s is invalid. "
3800 "(debug info %d)\n",
3801 zfcp_get_busid_by_unit(unit),
3802 fsf_req->adapter->fc_service_class);
3803 }
3804 /* stop operation for this adapter */
3805 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3806 "fsf_s_class_nsup");
3807 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3809 break;
3810
3811 case FSF_FCPLUN_NOT_VALID:
1da177e4
LT		 3812 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3813 "adapter %s does not have correct unit "
3814 "handle 0x%x\n",
3815 unit->fcp_lun,
3816 unit->port->wwpn,
3817 zfcp_get_busid_by_unit(unit),
3818 unit->handle);
3819 ZFCP_LOG_DEBUG("status qualifier:\n");
3820 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3821 (char *) &header->fsf_status_qual,
3822 sizeof (union fsf_status_qual));
3823 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3824 "fsf_s_fcp_lun_nv");
3825 zfcp_erp_port_reopen(unit->port, 0);
1da177e4
LT		 3826 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3827 break;
3828
3829 case FSF_ACCESS_DENIED:
1da177e4
LT		 3830 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3831 "unit 0x%016Lx on port 0x%016Lx on "
3832 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3833 zfcp_get_busid_by_unit(unit));
3834 for (counter = 0; counter < 2; counter++) {
3835 subtable = header->fsf_status_qual.halfword[counter * 2];
3836 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3837 switch (subtable) {
3838 case FSF_SQ_CFDC_SUBTABLE_OS:
3839 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3840 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3841 case FSF_SQ_CFDC_SUBTABLE_LUN:
3842 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3843 zfcp_act_subtable_type[subtable], rule);
3844 break;
3845 }
3846 }
3847 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3848 zfcp_erp_unit_access_denied(unit);
3849 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3850 break;
3851
3852 case FSF_DIRECTION_INDICATOR_NOT_VALID:
1da177e4
LT		 3853 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3854 "0x%016Lx on port 0x%016Lx on adapter %s "
3855 "(debug info %d)\n",
3856 unit->fcp_lun,
3857 unit->port->wwpn,
3858 zfcp_get_busid_by_unit(unit),
3859 fsf_req->qtcb->bottom.io.data_direction);
3860 /* stop operation for this adapter */
3861 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3862 "fsf_s_dir_ind_nv");
3863 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3864 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3865 break;
3866
3867 case FSF_CMND_LENGTH_NOT_VALID:
1da177e4
LT		 3868 ZFCP_LOG_NORMAL
3869 ("bug: An invalid control-data-block length field "
3870 "was found in a command for unit 0x%016Lx on port "
3871 "0x%016Lx on adapter %s " "(debug info %d)\n",
3872 unit->fcp_lun, unit->port->wwpn,
3873 zfcp_get_busid_by_unit(unit),
3874 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3875 /* stop operation for this adapter */
3876 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3877 "fsf_s_cmd_len_nv");
3878 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3879 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3880 break;
3881
3882 case FSF_PORT_BOXED:
1da177e4
LT		 3883 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3884 "needs to be reopened\n",
3885 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3886 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3887 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3888 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3889 ZFCP_STATUS_FSFREQ_RETRY;
3890 break;
3891
3892 case FSF_LUN_BOXED:
1da177e4
LT		 3893 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3894 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3895 zfcp_get_busid_by_unit(unit),
3896 unit->port->wwpn, unit->fcp_lun);
3897 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 3898 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 3899 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3900 | ZFCP_STATUS_FSFREQ_RETRY;
3901 break;
3902
3903 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3904 switch (header->fsf_status_qual.word[0]) {
3905 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3906 /* re-establish link to port */
3907 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3908 "fsf_sq_ltest");
65a8d4e1 3909 zfcp_test_link(unit->port);
1da177e4
LT		 3910 break;
3911 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3912 /* FIXME(hw) need proper specs for proper action */
3913 /* let scsi stack deal with retries and escalation */
3914 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3915 "fsf_sq_ulp");
1da177e4
LT		 3916 break;
3917 default:
1da177e4 3918 ZFCP_LOG_NORMAL
516a4201 3919 ("Unknown status qualifier 0x%x arrived.\n",
1da177e4
LT		 3920 header->fsf_status_qual.word[0]);
3921 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3922 "fsf_sq_inval:");
3923 debug_exception(fsf_req->adapter->erp_dbf, 0,
3924 &header->fsf_status_qual.word[0],
3925 sizeof(u32));
3926 break;
3927 }
516a4201 3928 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 3929 break;
3930
3931 case FSF_GOOD:
1da177e4
LT		 3932 break;
3933
3934 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 3935 break;
3936
3937 default:
3938 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3939 debug_exception(fsf_req->adapter->erp_dbf, 0,
3940 &header->fsf_status, sizeof(u32));
3941 break;
3942 }
3943
3944 skip_fsfstatus:
3945 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3946 retval =
3947 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3948 } else {
3949 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
059c97d0
AH		 3950 fsf_req->unit = NULL;
3951 zfcp_unit_put(unit);
1da177e4
LT		 3952 }
3953 return retval;
3954}
3955
3956/*
3957 * function: zfcp_fsf_send_fcp_command_task_handler
3958 *
3959 * purpose: evaluates FCP_RSP IU
3960 *
3961 * returns:
3962 */
3963static int
3964zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3965{
3966 int retval = 0;
3967 struct scsi_cmnd *scpnt;
3968 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3969 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3970 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3971 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3972 u32 sns_len;
3973 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3974 unsigned long flags;
059c97d0 3975 struct zfcp_unit *unit = fsf_req->unit;
1da177e4
LT		 3976
3977 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
059c97d0 3978 scpnt = (struct scsi_cmnd *) fsf_req->data;
1da177e4
LT		 3979 if (unlikely(!scpnt)) {
3980 ZFCP_LOG_DEBUG
3981 ("Command with fsf_req %p is not associated to "
3982 "a scsi command anymore. Aborted?\n", fsf_req);
3983 goto out;
3984 }
3985 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3986 /* FIXME: (design) mid-layer should handle DID_ABORT like
3987 * DID_SOFT_ERROR by retrying the request for devices
3988 * that allow retries.
3989 */
3990 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
3991 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
3992 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
3993 goto skip_fsfstatus;
3994 }
3995
3996 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3997 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
3998 set_host_byte(&scpnt->result, DID_ERROR);
3999 goto skip_fsfstatus;
4000 }
4001
4002 /* set message byte of result in SCSI command */
4003 scpnt->result |= COMMAND_COMPLETE << 8;
4004
4005 /*
4006 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4007 * of result in SCSI command
4008 */
4009 scpnt->result |= fcp_rsp_iu->scsi_status;
4010 if (unlikely(fcp_rsp_iu->scsi_status)) {
4011 /* DEBUG */
4012 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4013 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4014 scpnt->cmnd, scpnt->cmd_len);
4015 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4016 fcp_rsp_iu->scsi_status);
4017 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4018 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4019 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4020 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4021 fcp_rsp_iu->fcp_sns_len);
4022 }
4023
4024 /* check FCP_RSP_INFO */
4025 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4026 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4027 switch (fcp_rsp_info[3]) {
4028 case RSP_CODE_GOOD:
1da177e4
LT		 4029 /* ok, continue */
4030 ZFCP_LOG_TRACE("no failure or Task Management "
4031 "Function complete\n");
4032 set_host_byte(&scpnt->result, DID_OK);
4033 break;
4034 case RSP_CODE_LENGTH_MISMATCH:
1da177e4
LT		 4035 /* hardware bug */
4036 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4037 "that the fibrechannel protocol data "
4038 "length differs from the burst length. "
4039 "The problem occured on unit 0x%016Lx "
4040 "on port 0x%016Lx on adapter %s",
4041 unit->fcp_lun,
4042 unit->port->wwpn,
4043 zfcp_get_busid_by_unit(unit));
4044 /* dump SCSI CDB as prepared by zfcp */
4045 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4046 (char *) &fsf_req->qtcb->
4047 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 4048 set_host_byte(&scpnt->result, DID_ERROR);
4049 goto skip_fsfstatus;
4050 case RSP_CODE_FIELD_INVALID:
1da177e4
LT		 4051 /* driver or hardware bug */
4052 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4053 "that the fibrechannel protocol data "
4054 "fields were incorrectly set up. "
4055 "The problem occured on the unit "
4056 "0x%016Lx on port 0x%016Lx on "
4057 "adapter %s",
4058 unit->fcp_lun,
4059 unit->port->wwpn,
4060 zfcp_get_busid_by_unit(unit));
4061 /* dump SCSI CDB as prepared by zfcp */
4062 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4063 (char *) &fsf_req->qtcb->
4064 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4065 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4066 goto skip_fsfstatus;
4067 case RSP_CODE_RO_MISMATCH:
1da177e4
LT		 4068 /* hardware bug */
4069 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4070 "that conflicting values for the "
4071 "fibrechannel payload offset from the "
4072 "header were found. "
4073 "The problem occured on unit 0x%016Lx "
4074 "on port 0x%016Lx on adapter %s.\n",
4075 unit->fcp_lun,
4076 unit->port->wwpn,
4077 zfcp_get_busid_by_unit(unit));
4078 /* dump SCSI CDB as prepared by zfcp */
4079 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4080 (char *) &fsf_req->qtcb->
4081 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 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);
1da177e4 4098 set_host_byte(&scpnt->result, DID_ERROR);
6f71d9bc 4099 goto skip_fsfstatus;
1da177e4
LT		 4100 }
4101 }
4102
4103 /* check for sense data */
4104 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4105 sns_len = FSF_FCP_RSP_SIZE -
4106 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4107 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4108 sns_len);
4109 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4110 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4111 SCSI_SENSE_BUFFERSIZE);
4112 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4113 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4114 scpnt->result);
4115 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4116 (void *) &scpnt->cmnd, scpnt->cmd_len);
4117
4118 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4119 fcp_rsp_iu->fcp_sns_len);
4120 memcpy(&scpnt->sense_buffer,
4121 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4122 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4123 (void *) &scpnt->sense_buffer, sns_len);
4124 }
4125
4126 /* check for overrun */
4127 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4128 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4129 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4130 "The response data length is "
4131 "%d, the original length was %d.\n",
4132 unit->fcp_lun,
4133 unit->port->wwpn,
4134 zfcp_get_busid_by_unit(unit),
4135 fcp_rsp_iu->fcp_resid,
4136 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4137 }
4138
4139 /* check for underrun */
4140 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4141 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4142 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4143 "The response data length is "
4144 "%d, the original length was %d.\n",
4145 unit->fcp_lun,
4146 unit->port->wwpn,
4147 zfcp_get_busid_by_unit(unit),
4148 fcp_rsp_iu->fcp_resid,
4149 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4150
4151 scpnt->resid = fcp_rsp_iu->fcp_resid;
4152 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
6f71d9bc 4153 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4154 }
4155
4156 skip_fsfstatus:
4157 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4158
8a36e453
MS		 4159 if (scpnt->result != 0)
4160 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt);
4161 else if (scpnt->retries > 0)
4162 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt);
4163 else
4164 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt);
1da177e4
LT		 4165
4166 /* cleanup pointer (need this especially for abort) */
4167 scpnt->host_scribble = NULL;
4168
1da177e4 4169 /* always call back */
1da177e4
LT		 4170 (scpnt->scsi_done) (scpnt);
4171
4172 /*
4173 * We must hold this lock until scsi_done has been called.
4174 * Otherwise we may call scsi_done after abort regarding this
4175 * command has completed.
4176 * Note: scsi_done must not block!
4177 */
4178 out:
4179 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4180 return retval;
4181}
4182
4183/*
4184 * function: zfcp_fsf_send_fcp_command_task_management_handler
4185 *
4186 * purpose: evaluates FCP_RSP IU
4187 *
4188 * returns:
4189 */
4190static int
4191zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4192{
4193 int retval = 0;
4194 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4195 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4196 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
059c97d0 4197 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 4198
4199 del_timer(&fsf_req->adapter->scsi_er_timer);
4200 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4201 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4202 goto skip_fsfstatus;
4203 }
4204
4205 /* check FCP_RSP_INFO */
4206 switch (fcp_rsp_info[3]) {
4207 case RSP_CODE_GOOD:
1da177e4
LT		 4208 /* ok, continue */
4209 ZFCP_LOG_DEBUG("no failure or Task Management "
4210 "Function complete\n");
4211 break;
4212 case RSP_CODE_TASKMAN_UNSUPP:
1da177e4
LT		 4213 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4214 "is not supported on the target device "
4215 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4216 unit->fcp_lun,
4217 unit->port->wwpn,
4218 zfcp_get_busid_by_unit(unit));
4219 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4220 break;
4221 case RSP_CODE_TASKMAN_FAILED:
1da177e4
LT		 4222 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4223 "failed to complete successfully. "
4224 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4225 unit->fcp_lun,
4226 unit->port->wwpn,
4227 zfcp_get_busid_by_unit(unit));
4228 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4229 break;
4230 default:
4231 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4232 "code was detected for a command. "
4233 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4234 "(debug info 0x%x)\n",
4235 unit->fcp_lun,
4236 unit->port->wwpn,
4237 zfcp_get_busid_by_unit(unit),
4238 fcp_rsp_info[3]);
4239 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4240 }
4241
4242 skip_fsfstatus:
4243 return retval;
4244}
4245
4246
4247/*
4248 * function: zfcp_fsf_control_file
4249 *
4250 * purpose: Initiator of the control file upload/download FSF requests
4251 *
4252 * returns: 0 - FSF request is successfuly created and queued
4253 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4254 * -EINVAL - Invalid direction specified
4255 * -ENOMEM - Insufficient memory
4256 * -EPERM - Cannot create FSF request or place it in QDIO queue
4257 */
4258int
4259zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4260 struct zfcp_fsf_req **fsf_req_ptr,
4261 u32 fsf_command,
4262 u32 option,
4263 struct zfcp_sg_list *sg_list)
4264{
4265 struct zfcp_fsf_req *fsf_req;
4266 struct fsf_qtcb_bottom_support *bottom;
4267 volatile struct qdio_buffer_element *sbale;
4268 struct timer_list *timer;
4269 unsigned long lock_flags;
4270 int req_flags = 0;
4271 int direction;
4272 int retval = 0;
4273
aef4a983 4274 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
1da177e4
LT		 4275 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4276 zfcp_get_busid_by_adapter(adapter));
4277 retval = -EOPNOTSUPP;
4278 goto out;
4279 }
4280
4281 switch (fsf_command) {
4282
4283 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4284 direction = SBAL_FLAGS0_TYPE_WRITE;
4285 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4286 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4287 req_flags = ZFCP_WAIT_FOR_SBAL;
4288 break;
4289
4290 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4291 direction = SBAL_FLAGS0_TYPE_READ;
4292 break;
4293
4294 default:
4295 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4296 retval = -EINVAL;
4297 goto out;
4298 }
4299
4300 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4301 if (!timer) {
4302 retval = -ENOMEM;
4303 goto out;
4304 }
4305
4306 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4307 NULL, &lock_flags, &fsf_req);
4308 if (retval < 0) {
4309 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4310 "adapter %s\n",
4311 zfcp_get_busid_by_adapter(adapter));
4312 retval = -EPERM;
4313 goto unlock_queue_lock;
4314 }
4315
4316 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4317 sbale[0].flags |= direction;
4318
4319 bottom = &fsf_req->qtcb->bottom.support;
4320 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4321 bottom->option = option;
4322
4323 if (sg_list->count > 0) {
4324 int bytes;
4325
4326 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4327 sg_list->sg, sg_list->count,
4328 ZFCP_MAX_SBALS_PER_REQ);
4329 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4330 ZFCP_LOG_INFO(
4331 "error: Could not create sufficient number of "
4332 "SBALS for an FSF request to the adapter %s\n",
4333 zfcp_get_busid_by_adapter(adapter));
4334 retval = -ENOMEM;
4335 goto free_fsf_req;
4336 }
4337 } else
4338 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4339
4340 init_timer(timer);
4341 timer->function = zfcp_fsf_request_timeout_handler;
4342 timer->data = (unsigned long) adapter;
4343 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4344
4345 retval = zfcp_fsf_req_send(fsf_req, timer);
4346 if (retval < 0) {
4347 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4348 "(adapter %s)\n",
4349 zfcp_get_busid_by_adapter(adapter));
4350 retval = -EPERM;
4351 goto free_fsf_req;
4352 }
4353 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4354
4355 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4356 "adapter %s\n",
4357 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4358 "download" : "upload",
4359 zfcp_get_busid_by_adapter(adapter));
4360
4361 wait_event(fsf_req->completion_wq,
4362 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4363
4364 *fsf_req_ptr = fsf_req;
4365 del_timer_sync(timer);
4366 goto free_timer;
4367
4368 free_fsf_req:
4369 zfcp_fsf_req_free(fsf_req);
4370 unlock_queue_lock:
4371 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4372 free_timer:
4373 kfree(timer);
4374 out:
4375 return retval;
4376}
4377
4378
4379/*
4380 * function: zfcp_fsf_control_file_handler
4381 *
4382 * purpose: Handler of the control file upload/download FSF requests
4383 *
4384 * returns: 0 - FSF request successfuly processed
4385 * -EAGAIN - Operation has to be repeated because of a temporary problem
4386 * -EACCES - There is no permission to execute an operation
4387 * -EPERM - The control file is not in a right format
4388 * -EIO - There is a problem with the FCP adapter
4389 * -EINVAL - Invalid operation
4390 * -EFAULT - User space memory I/O operation fault
4391 */
4392static int
4393zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4394{
4395 struct zfcp_adapter *adapter = fsf_req->adapter;
4396 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4397 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4398 int retval = 0;
4399
4400 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4401 retval = -EINVAL;
4402 goto skip_fsfstatus;
4403 }
4404
4405 switch (header->fsf_status) {
4406
4407 case FSF_GOOD:
1da177e4
LT		 4408 ZFCP_LOG_NORMAL(
4409 "The FSF request has been successfully completed "
4410 "on the adapter %s\n",
4411 zfcp_get_busid_by_adapter(adapter));
4412 break;
4413
4414 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
1da177e4
LT		 4415 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4416 switch (header->fsf_status_qual.word[0]) {
4417
6f71d9bc
JB		 4418 case FSF_SQ_CFDC_HARDENED_ON_SE:
4419 ZFCP_LOG_NORMAL(
4420 "CFDC on the adapter %s has being "
4421 "hardened on primary and secondary SE\n",
4422 zfcp_get_busid_by_adapter(adapter));
4423 break;
4424
1da177e4
LT		 4425 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4426 ZFCP_LOG_NORMAL(
4427 "CFDC of the adapter %s could not "
4428 "be saved on the SE\n",
4429 zfcp_get_busid_by_adapter(adapter));
4430 break;
4431
4432 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4433 ZFCP_LOG_NORMAL(
4434 "CFDC of the adapter %s could not "
4435 "be copied to the secondary SE\n",
4436 zfcp_get_busid_by_adapter(adapter));
4437 break;
4438
4439 default:
4440 ZFCP_LOG_NORMAL(
4441 "CFDC could not be hardened "
4442 "on the adapter %s\n",
4443 zfcp_get_busid_by_adapter(adapter));
4444 }
4445 }
4446 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4447 retval = -EAGAIN;
4448 break;
4449
4450 case FSF_AUTHORIZATION_FAILURE:
1da177e4
LT		 4451 ZFCP_LOG_NORMAL(
4452 "Adapter %s does not accept privileged commands\n",
4453 zfcp_get_busid_by_adapter(adapter));
4454 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4455 retval = -EACCES;
4456 break;
4457
4458 case FSF_CFDC_ERROR_DETECTED:
1da177e4
LT		 4459 ZFCP_LOG_NORMAL(
4460 "Error at position %d in the CFDC, "
4461 "CFDC is discarded by the adapter %s\n",
4462 header->fsf_status_qual.word[0],
4463 zfcp_get_busid_by_adapter(adapter));
4464 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4465 retval = -EPERM;
4466 break;
4467
4468 case FSF_CONTROL_FILE_UPDATE_ERROR:
1da177e4
LT		 4469 ZFCP_LOG_NORMAL(
4470 "Adapter %s cannot harden the control file, "
4471 "file is discarded\n",
4472 zfcp_get_busid_by_adapter(adapter));
4473 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4474 retval = -EIO;
4475 break;
4476
4477 case FSF_CONTROL_FILE_TOO_LARGE:
1da177e4
LT		 4478 ZFCP_LOG_NORMAL(
4479 "Control file is too large, file is discarded "
4480 "by the adapter %s\n",
4481 zfcp_get_busid_by_adapter(adapter));
4482 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4483 retval = -EIO;
4484 break;
4485
4486 case FSF_ACCESS_CONFLICT_DETECTED:
1da177e4
LT		 4487 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4488 ZFCP_LOG_NORMAL(
4489 "CFDC has been discarded by the adapter %s, "
4490 "because activation would impact "
4491 "%d active connection(s)\n",
4492 zfcp_get_busid_by_adapter(adapter),
4493 header->fsf_status_qual.word[0]);
4494 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4495 retval = -EIO;
4496 break;
4497
4498 case FSF_CONFLICTS_OVERRULED:
1da177e4
LT		 4499 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4500 ZFCP_LOG_NORMAL(
4501 "CFDC has been activated on the adapter %s, "
4502 "but activation has impacted "
4503 "%d active connection(s)\n",
4504 zfcp_get_busid_by_adapter(adapter),
4505 header->fsf_status_qual.word[0]);
4506 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4507 retval = -EIO;
4508 break;
4509
4510 case FSF_UNKNOWN_OP_SUBTYPE:
1da177e4
LT		 4511 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4512 "op_subtype=0x%x)\n",
4513 zfcp_get_busid_by_adapter(adapter),
4514 bottom->operation_subtype);
4515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4516 retval = -EINVAL;
4517 break;
4518
4519 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 4520 ZFCP_LOG_NORMAL(
4521 "Invalid option 0x%x has been specified "
4522 "in QTCB bottom sent to the adapter %s\n",
4523 bottom->option,
4524 zfcp_get_busid_by_adapter(adapter));
4525 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4526 retval = -EINVAL;
4527 break;
4528
4529 default:
4530 ZFCP_LOG_NORMAL(
4531 "bug: An unknown/unexpected FSF status 0x%08x "
4532 "was presented on the adapter %s\n",
4533 header->fsf_status,
4534 zfcp_get_busid_by_adapter(adapter));
4535 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4536 debug_exception(fsf_req->adapter->erp_dbf, 0,
4537 &header->fsf_status_qual.word[0], sizeof(u32));
4538 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4539 retval = -EINVAL;
4540 break;
4541 }
4542
4543skip_fsfstatus:
4544 return retval;
4545}
4546
1da177e4
LT		 4547static inline int
4548zfcp_fsf_req_sbal_check(unsigned long *flags,
4549 struct zfcp_qdio_queue *queue, int needed)
4550{
4551 write_lock_irqsave(&queue->queue_lock, *flags);
4552 if (likely(atomic_read(&queue->free_count) >= needed))
4553 return 1;
4554 write_unlock_irqrestore(&queue->queue_lock, *flags);
4555 return 0;
4556}
4557
4558/*
4559 * set qtcb pointer in fsf_req and initialize QTCB
4560 */
4561static inline void
8a36e453 4562zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 4563{
4564 if (likely(fsf_req->qtcb != NULL)) {
8a36e453 4565 fsf_req->qtcb->prefix.req_seq_no = fsf_req->adapter->fsf_req_seq_no;
1da177e4
LT		 4566 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4567 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
8a36e453 4568 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_req->fsf_command];
1da177e4
LT		 4569 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4570 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
8a36e453 4571 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
1da177e4
LT		 4572 }
4573}
4574
4575/**
4576 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4577 * @adapter: adapter for which request queue is examined
4578 * @req_flags: flags indicating whether to wait for needed SBAL or not
4579 * @lock_flags: lock_flags if queue_lock is taken
4580 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4581 * Locks: lock adapter->request_queue->queue_lock on success
4582 */
4583static int
4584zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4585 unsigned long *lock_flags)
4586{
4587 long ret;
4588 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4589
4590 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4591 ret = wait_event_interruptible_timeout(adapter->request_wq,
4592 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4593 ZFCP_SBAL_TIMEOUT);
4594 if (ret < 0)
4595 return ret;
4596 if (!ret)
4597 return -EIO;
4598 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4599 return -EIO;
4600
4601 return 0;
4602}
4603
4604/*
4605 * function: zfcp_fsf_req_create
4606 *
4607 * purpose: create an FSF request at the specified adapter and
4608 * setup common fields
4609 *
4610 * returns: -ENOMEM if there was insufficient memory for a request
4611 * -EIO if no qdio buffers could be allocate to the request
4612 * -EINVAL/-EPERM on bug conditions in req_dequeue
4613 * 0 in success
4614 *
4615 * note: The created request is returned by reference.
4616 *
4617 * locks: lock of concerned request queue must not be held,
4618 * but is held on completion (write, irqsave)
4619 */
4620int
4621zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4622 mempool_t *pool, unsigned long *lock_flags,
4623 struct zfcp_fsf_req **fsf_req_p)
4624{
4625 volatile struct qdio_buffer_element *sbale;
4626 struct zfcp_fsf_req *fsf_req = NULL;
4627 int ret = 0;
4628 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4629
4630 /* allocate new FSF request */
4631 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4632 if (unlikely(NULL == fsf_req)) {
4633 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4634 "the outbound (send) queue.\n");
4635 ret = -ENOMEM;
4636 goto failed_fsf_req;
4637 }
4638
8a36e453
MS		 4639 fsf_req->adapter = adapter;
4640 fsf_req->fsf_command = fsf_cmd;
4641
4642 zfcp_fsf_req_qtcb_init(fsf_req);
1da177e4
LT		 4643
4644 /* initialize waitqueue which may be used to wait on
4645 this request completion */
4646 init_waitqueue_head(&fsf_req->completion_wq);
4647
4648 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4649 if(ret < 0) {
4650 goto failed_sbals;
4651 }
4652
4653 /*
4654 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4655 * if it is not set (see also *_open_qdio and *_close_qdio).
4656 */
4657
4658 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4659 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4660 ret = -EIO;
4661 goto failed_sbals;
4662 }
4663
8a36e453
MS		 4664 if (fsf_req->qtcb) {
4665 fsf_req->seq_no = adapter->fsf_req_seq_no;
4666 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4667 }
1da177e4
LT		 4668 fsf_req->sbal_number = 1;
4669 fsf_req->sbal_first = req_queue->free_index;
4670 fsf_req->sbal_curr = req_queue->free_index;
4671 fsf_req->sbale_curr = 1;
4672
4673 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4674 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4675 }
4676
4677 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4678
4679 /* setup common SBALE fields */
4680 sbale[0].addr = fsf_req;
4681 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4682 if (likely(fsf_req->qtcb != NULL)) {
4683 sbale[1].addr = (void *) fsf_req->qtcb;
4684 sbale[1].length = sizeof(struct fsf_qtcb);
4685 }
4686
4687 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4688 fsf_req->sbal_number, fsf_req->sbal_first);
4689
4690 goto success;
4691
4692 failed_sbals:
4693/* dequeue new FSF request previously enqueued */
4694 zfcp_fsf_req_free(fsf_req);
4695 fsf_req = NULL;
4696
4697 failed_fsf_req:
4698 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4699 success:
4700 *fsf_req_p = fsf_req;
4701 return ret;
4702}
4703
4704/*
4705 * function: zfcp_fsf_req_send
4706 *
4707 * purpose: start transfer of FSF request via QDIO
4708 *
4709 * returns: 0 - request transfer succesfully started
4710 * !0 - start of request transfer failed
4711 */
4712static int
4713zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4714{
4715 struct zfcp_adapter *adapter;
4716 struct zfcp_qdio_queue *req_queue;
4717 volatile struct qdio_buffer_element *sbale;
8a36e453 4718 int inc_seq_no;
1da177e4
LT		 4719 int new_distance_from_int;
4720 unsigned long flags;
1da177e4
LT		 4721 int retval = 0;
4722
4723 adapter = fsf_req->adapter;
4724 req_queue = &adapter->request_queue,
4725
4726
4727 /* FIXME(debug): remove it later */
4728 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4729 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4730 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4731 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4732 sbale[1].length);
4733
1da177e4 4734 /* put allocated FSF request at list tail */
1db2c9c0 4735 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
1da177e4 4736 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
1db2c9c0 4737 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4 4738
8a36e453
MS		 4739 inc_seq_no = (fsf_req->qtcb != NULL);
4740
1da177e4
LT		 4741 /* figure out expiration time of timeout and start timeout */
4742 if (unlikely(timer)) {
4743 timer->expires += jiffies;
4744 add_timer(timer);
4745 }
4746
4747 ZFCP_LOG_TRACE("request queue of adapter %s: "
4748 "next free SBAL is %i, %i free SBALs\n",
4749 zfcp_get_busid_by_adapter(adapter),
4750 req_queue->free_index,
4751 atomic_read(&req_queue->free_count));
4752
4753 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4754 "index_in_queue=%i, count=%i, buffers=%p\n",
4755 zfcp_get_busid_by_adapter(adapter),
4756 QDIO_FLAG_SYNC_OUTPUT,
4757 0, fsf_req->sbal_first, fsf_req->sbal_number,
4758 &req_queue->buffer[fsf_req->sbal_first]);
4759
4760 /*
4761 * adjust the number of free SBALs in request queue as well as
4762 * position of first one
4763 */
4764 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4765 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4766 req_queue->free_index += fsf_req->sbal_number; /* increase */
4767 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4768 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4769
8a36e453
MS		 4770 fsf_req->issued = get_clock();
4771
1da177e4
LT		 4772 retval = do_QDIO(adapter->ccw_device,
4773 QDIO_FLAG_SYNC_OUTPUT,
4774 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4775
4776 if (unlikely(retval)) {
4777 /* Queues are down..... */
4778 retval = -EIO;
4779 /*
4780 * FIXME(potential race):
4781 * timer might be expired (absolutely unlikely)
4782 */
4783 if (timer)
4784 del_timer(timer);
1db2c9c0 4785 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
1da177e4 4786 list_del(&fsf_req->list);
1db2c9c0 4787 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4
LT		 4788 /*
4789 * adjust the number of free SBALs in request queue as well as
4790 * position of first one
4791 */
4792 zfcp_qdio_zero_sbals(req_queue->buffer,
4793 fsf_req->sbal_first, fsf_req->sbal_number);
4794 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4795 req_queue->free_index -= fsf_req->sbal_number; /* increase */
4796 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4797 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4798 ZFCP_LOG_DEBUG
4799 ("error: do_QDIO failed. Buffers could not be enqueued "
4800 "to request queue.\n");
4801 } else {
4802 req_queue->distance_from_int = new_distance_from_int;
4803 /*
4804 * increase FSF sequence counter -
4805 * this must only be done for request successfully enqueued to
4806 * QDIO this rejected requests may be cleaned up by calling
4807 * routines resulting in missing sequence counter values
4808 * otherwise,
4809 */
8a36e453 4810
1da177e4 4811 /* Don't increase for unsolicited status */
8a36e453 4812 if (inc_seq_no)
1da177e4 4813 adapter->fsf_req_seq_no++;
8a36e453 4814
1da177e4
LT		 4815 /* count FSF requests pending */
4816 atomic_inc(&adapter->fsf_reqs_active);
4817 }
4818 return retval;
4819}
4820
1da177e4 4821#undef ZFCP_LOG_AREA
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