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[SCSI] zfcp: shorten eh_bus_reset and eh_host_reset handlers
[deliverable/linux.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 *);
62static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
63static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
1da177e4
LT		 64
65/* association between FSF command and FSF QTCB type */
66static u32 fsf_qtcb_type[] = {
67 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
68 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
69 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
70 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
75 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
76 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
77 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
78 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
79 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
80};
81
82static const char zfcp_act_subtable_type[5][8] = {
83 "unknown", "OS", "WWPN", "DID", "LUN"
84};
85
86/****************************************************************/
87/*************** FSF related Functions *************************/
88/****************************************************************/
89
90#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
91
92/*
93 * function: zfcp_fsf_req_alloc
94 *
95 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
96 * unsolicited requests) via helper functions
97 * Does some initial fsf request set-up.
98 *
99 * returns: pointer to allocated fsf_req if successfull
100 * NULL otherwise
101 *
102 * locks: none
103 *
104 */
105static struct zfcp_fsf_req *
106zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
107{
108 size_t size;
109 void *ptr;
110 struct zfcp_fsf_req *fsf_req = NULL;
111
112 if (req_flags & ZFCP_REQ_NO_QTCB)
113 size = sizeof(struct zfcp_fsf_req);
114 else
115 size = sizeof(struct zfcp_fsf_req_pool_element);
116
117 if (likely(pool != NULL))
118 ptr = mempool_alloc(pool, GFP_ATOMIC);
119 else
120 ptr = kmalloc(size, GFP_ATOMIC);
121
122 if (unlikely(NULL == ptr))
123 goto out;
124
125 memset(ptr, 0, size);
126
127 if (req_flags & ZFCP_REQ_NO_QTCB) {
128 fsf_req = (struct zfcp_fsf_req *) ptr;
129 } else {
130 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
131 fsf_req->qtcb =
132 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
133 }
134
135 fsf_req->pool = pool;
136
137 out:
138 return fsf_req;
139}
140
141/*
142 * function: zfcp_fsf_req_free
143 *
144 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
145 * returns it into the pool via helper functions.
146 *
147 * returns: sod all
148 *
149 * locks: none
150 */
1db2c9c0 151void
1da177e4
LT		 152zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
153{
154 if (likely(fsf_req->pool != NULL))
155 mempool_free(fsf_req, fsf_req->pool);
1db2c9c0
AH		 156 else
157 kfree(fsf_req);
1da177e4
LT		 158}
159
160/*
161 * function:
162 *
163 * purpose:
164 *
165 * returns:
166 *
167 * note: qdio queues shall be down (no ongoing inbound processing)
168 */
169int
170zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
171{
1da177e4 172 struct zfcp_fsf_req *fsf_req, *tmp;
1db2c9c0
AH		 173 unsigned long flags;
174 LIST_HEAD(remove_queue);
1da177e4 175
1db2c9c0
AH		 176 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
177 list_splice_init(&adapter->fsf_req_list_head, &remove_queue);
178 atomic_set(&adapter->fsf_reqs_active, 0);
179 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4 180
1db2c9c0
AH		 181 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
182 list_del(&fsf_req->list);
183 zfcp_fsf_req_dismiss(fsf_req);
1da177e4
LT		 184 }
185
1db2c9c0 186 return 0;
1da177e4
LT		 187}
188
189/*
190 * function:
191 *
192 * purpose:
193 *
194 * returns:
195 */
196static void
197zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
198{
199 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
200 zfcp_fsf_req_complete(fsf_req);
201}
202
203/*
204 * function: zfcp_fsf_req_complete
205 *
206 * purpose: Updates active counts and timers for openfcp-reqs
207 * May cleanup request after req_eval returns
208 *
209 * returns: 0 - success
210 * !0 - failure
211 *
212 * context:
213 */
214int
215zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
216{
217 int retval = 0;
218 int cleanup;
1da177e4
LT		 219
220 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
221 ZFCP_LOG_DEBUG("Status read response received\n");
222 /*
223 * Note: all cleanup handling is done in the callchain of
224 * the function call-chain below.
225 */
226 zfcp_fsf_status_read_handler(fsf_req);
227 goto out;
228 } else
229 zfcp_fsf_protstatus_eval(fsf_req);
230
231 /*
232 * fsf_req may be deleted due to waking up functions, so
233 * cleanup is saved here and used later
234 */
235 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
236 cleanup = 1;
237 else
238 cleanup = 0;
239
240 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
241
242 /* cleanup request if requested by initiator */
243 if (likely(cleanup)) {
244 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
245 /*
246 * lock must not be held here since it will be
247 * grabed by the called routine, too
248 */
1db2c9c0 249 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 250 } else {
251 /* notify initiator waiting for the requests completion */
252 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
253 /*
254 * FIXME: Race! We must not access fsf_req here as it might have been
255 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
256 * flag. It's an improbable case. But, we have the same paranoia for
257 * the cleanup flag already.
258 * Might better be handled using complete()?
259 * (setting the flag and doing wakeup ought to be atomic
260 * with regard to checking the flag as long as waitqueue is
261 * part of the to be released structure)
262 */
263 wake_up(&fsf_req->completion_wq);
264 }
265
266 out:
267 return retval;
268}
269
270/*
271 * function: zfcp_fsf_protstatus_eval
272 *
273 * purpose: evaluates the QTCB of the finished FSF request
274 * and initiates appropriate actions
275 * (usually calling FSF command specific handlers)
276 *
277 * returns:
278 *
279 * context:
280 *
281 * locks:
282 */
283static int
284zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
285{
286 int retval = 0;
287 struct zfcp_adapter *adapter = fsf_req->adapter;
288
289 ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
290
291 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
292 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
293 (unsigned long) fsf_req);
294 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
295 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
296 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
297 goto skip_protstatus;
298 }
299
300 /* log additional information provided by FSF (if any) */
301 if (unlikely(fsf_req->qtcb->header.log_length)) {
302 /* do not trust them ;-) */
303 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
304 ZFCP_LOG_NORMAL
305 ("bug: ULP (FSF logging) log data starts "
306 "beyond end of packet header. Ignored. "
307 "(start=%i, size=%li)\n",
308 fsf_req->qtcb->header.log_start,
309 sizeof(struct fsf_qtcb));
310 goto forget_log;
311 }
312 if ((size_t) (fsf_req->qtcb->header.log_start +
313 fsf_req->qtcb->header.log_length)
314 > sizeof(struct fsf_qtcb)) {
315 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
316 "beyond end of packet header. Ignored. "
317 "(start=%i, length=%i, size=%li)\n",
318 fsf_req->qtcb->header.log_start,
319 fsf_req->qtcb->header.log_length,
320 sizeof(struct fsf_qtcb));
321 goto forget_log;
322 }
323 ZFCP_LOG_TRACE("ULP log data: \n");
324 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
325 (char *) fsf_req->qtcb +
326 fsf_req->qtcb->header.log_start,
327 fsf_req->qtcb->header.log_length);
328 }
329 forget_log:
330
331 /* evaluate FSF Protocol Status */
332 switch (fsf_req->qtcb->prefix.prot_status) {
333
334 case FSF_PROT_GOOD:
1da177e4 335 case FSF_PROT_FSF_STATUS_PRESENTED:
1da177e4
LT		 336 break;
337
338 case FSF_PROT_QTCB_VERSION_ERROR:
1da177e4
LT		 339 ZFCP_LOG_NORMAL("error: The adapter %s contains "
340 "microcode of version 0x%x, the device driver "
341 "only supports 0x%x. Aborting.\n",
342 zfcp_get_busid_by_adapter(adapter),
343 fsf_req->qtcb->prefix.prot_status_qual.
344 version_error.fsf_version, ZFCP_QTCB_VERSION);
345 /* stop operation for this adapter */
346 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
347 zfcp_erp_adapter_shutdown(adapter, 0);
348 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
349 &fsf_req->qtcb->prefix.prot_status_qual,
350 sizeof (union fsf_prot_status_qual));
351 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
352 break;
353
354 case FSF_PROT_SEQ_NUMB_ERROR:
1da177e4
LT		 355 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
356 "driver (0x%x) and adapter %s (0x%x). "
357 "Restarting all operations on this adapter.\n",
358 fsf_req->qtcb->prefix.req_seq_no,
359 zfcp_get_busid_by_adapter(adapter),
360 fsf_req->qtcb->prefix.prot_status_qual.
361 sequence_error.exp_req_seq_no);
362 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
363 /* restart operation on this adapter */
364 zfcp_erp_adapter_reopen(adapter, 0);
365 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
366 &fsf_req->qtcb->prefix.prot_status_qual,
367 sizeof (union fsf_prot_status_qual));
368 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
369 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
370 break;
371
372 case FSF_PROT_UNSUPP_QTCB_TYPE:
1da177e4
LT		 373 ZFCP_LOG_NORMAL("error: Packet header type used by the "
374 "device driver is incompatible with "
375 "that used on adapter %s. "
376 "Stopping all operations on this adapter.\n",
377 zfcp_get_busid_by_adapter(adapter));
378 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
379 zfcp_erp_adapter_shutdown(adapter, 0);
380 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
381 &fsf_req->qtcb->prefix.prot_status_qual,
382 sizeof (union fsf_prot_status_qual));
383 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
384 break;
385
386 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
1da177e4
LT		 387 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
388 &fsf_req->qtcb->prefix.prot_status_qual,
389 sizeof (union fsf_prot_status_qual));
390 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
391 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
392 &(adapter->status));
393 debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
394 break;
395
396 case FSF_PROT_DUPLICATE_REQUEST_ID:
1da177e4
LT		 397 if (fsf_req->qtcb) {
398 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
399 "to the adapter %s is ambiguous. "
400 "Stopping all operations on this "
401 "adapter.\n",
402 *(unsigned long long *)
403 (&fsf_req->qtcb->bottom.support.
404 req_handle),
405 zfcp_get_busid_by_adapter(adapter));
406 } else {
407 ZFCP_LOG_NORMAL("bug: The request identifier %p "
408 "to the adapter %s is ambiguous. "
409 "Stopping all operations on this "
410 "adapter. "
411 "(bug: got this for an unsolicited "
412 "status read request)\n",
413 fsf_req,
414 zfcp_get_busid_by_adapter(adapter));
415 }
416 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
417 zfcp_erp_adapter_shutdown(adapter, 0);
418 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
419 &fsf_req->qtcb->prefix.prot_status_qual,
420 sizeof (union fsf_prot_status_qual));
421 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
422 break;
423
424 case FSF_PROT_LINK_DOWN:
1da177e4
LT		 425 /*
426 * 'test and set' is not atomic here -
427 * it's ok as long as calls to our response queue handler
428 * (and thus execution of this code here) are serialized
429 * by the qdio module
430 */
431 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
432 &adapter->status)) {
433 switch (fsf_req->qtcb->prefix.prot_status_qual.
434 locallink_error.code) {
435 case FSF_PSQ_LINK_NOLIGHT:
436 ZFCP_LOG_INFO("The local link to adapter %s "
437 "is down (no light detected).\n",
438 zfcp_get_busid_by_adapter(
439 adapter));
440 break;
441 case FSF_PSQ_LINK_WRAPPLUG:
442 ZFCP_LOG_INFO("The local link to adapter %s "
443 "is down (wrap plug detected).\n",
444 zfcp_get_busid_by_adapter(
445 adapter));
446 break;
447 case FSF_PSQ_LINK_NOFCP:
448 ZFCP_LOG_INFO("The local link to adapter %s "
449 "is down (adjacent node on "
450 "link does not support FCP).\n",
451 zfcp_get_busid_by_adapter(
452 adapter));
453 break;
454 default:
455 ZFCP_LOG_INFO("The local link to adapter %s "
456 "is down "
457 "(warning: unknown reason "
458 "code).\n",
459 zfcp_get_busid_by_adapter(
460 adapter));
461 break;
462
463 }
464 /*
465 * Due to the 'erp failed' flag the adapter won't
466 * be recovered but will be just set to 'blocked'
467 * state. All subordinary devices will have state
468 * 'blocked' and 'erp failed', too.
469 * Thus the adapter is still able to provide
470 * 'link up' status without being flooded with
471 * requests.
472 * (note: even 'close port' is not permitted)
473 */
474 ZFCP_LOG_INFO("Stopping all operations for adapter "
475 "%s.\n",
476 zfcp_get_busid_by_adapter(adapter));
477 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
478 ZFCP_STATUS_COMMON_ERP_FAILED,
479 &adapter->status);
480 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 481 }
482 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
483 break;
484
485 case FSF_PROT_REEST_QUEUE:
1da177e4
LT		 486 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
487 ZFCP_LOG_INFO("The local link to adapter with "
488 "%s was re-plugged. "
489 "Re-starting operations on this adapter.\n",
490 zfcp_get_busid_by_adapter(adapter));
491 /* All ports should be marked as ready to run again */
492 zfcp_erp_modify_adapter_status(adapter,
493 ZFCP_STATUS_COMMON_RUNNING,
494 ZFCP_SET);
495 zfcp_erp_adapter_reopen(adapter,
496 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
497 | ZFCP_STATUS_COMMON_ERP_FAILED);
498 zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
499 &fsf_req->qtcb->prefix.prot_status_qual,
500 sizeof (union fsf_prot_status_qual));
501 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
502 break;
503
504 case FSF_PROT_ERROR_STATE:
1da177e4
LT		 505 ZFCP_LOG_NORMAL("error: The adapter %s "
506 "has entered the error state. "
507 "Restarting all operations on this "
508 "adapter.\n",
509 zfcp_get_busid_by_adapter(adapter));
510 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
511 /* restart operation on this adapter */
512 zfcp_erp_adapter_reopen(adapter, 0);
513 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
514 &fsf_req->qtcb->prefix.prot_status_qual,
515 sizeof (union fsf_prot_status_qual));
516 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
518 break;
519
520 default:
521 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
522 "provided by the adapter %s "
523 "is not compatible with the device driver. "
524 "Stopping all operations on this adapter. "
525 "(debug info 0x%x).\n",
526 zfcp_get_busid_by_adapter(adapter),
527 fsf_req->qtcb->prefix.prot_status);
528 debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
529 debug_exception(adapter->erp_dbf, 0,
530 &fsf_req->qtcb->prefix.prot_status,
531 sizeof (u32));
532 zfcp_erp_adapter_shutdown(adapter, 0);
533 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
534 }
535
536 skip_protstatus:
537 /*
538 * always call specific handlers to give them a chance to do
539 * something meaningful even in error cases
540 */
541 zfcp_fsf_fsfstatus_eval(fsf_req);
542 return retval;
543}
544
545/*
546 * function: zfcp_fsf_fsfstatus_eval
547 *
548 * purpose: evaluates FSF status of completed FSF request
549 * and acts accordingly
550 *
551 * returns:
552 */
553static int
554zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
555{
556 int retval = 0;
557
558 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
559 goto skip_fsfstatus;
560 }
561
562 /* evaluate FSF Status */
563 switch (fsf_req->qtcb->header.fsf_status) {
564 case FSF_UNKNOWN_COMMAND:
1da177e4
LT		 565 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
566 "not known by the adapter %s "
567 "Stopping all operations on this adapter. "
568 "(debug info 0x%x).\n",
569 zfcp_get_busid_by_adapter(fsf_req->adapter),
570 fsf_req->qtcb->header.fsf_command);
571 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
572 "fsf_s_unknown");
573 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
574 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
575 &fsf_req->qtcb->header.fsf_status_qual,
576 sizeof (union fsf_status_qual));
577 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
578 break;
579
580 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 581 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
582 "SCSI stack.\n");
583 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
584 break;
585
586 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 587 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
588 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
589 break;
590
591 default:
592 break;
593 }
594
595 skip_fsfstatus:
596 /*
597 * always call specific handlers to give them a chance to do
598 * something meaningful even in error cases
599 */
600 zfcp_fsf_req_dispatch(fsf_req);
601
602 return retval;
603}
604
605/*
606 * function: zfcp_fsf_fsfstatus_qual_eval
607 *
608 * purpose: evaluates FSF status-qualifier of completed FSF request
609 * and acts accordingly
610 *
611 * returns:
612 */
613static int
614zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
615{
616 int retval = 0;
617
618 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
619 case FSF_SQ_FCP_RSP_AVAILABLE:
1da177e4
LT		 620 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
621 break;
622 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 623 /* The SCSI-stack may now issue retries or escalate */
624 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
625 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
626 &fsf_req->qtcb->header.fsf_status_qual,
627 sizeof (union fsf_status_qual));
628 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
629 break;
630 case FSF_SQ_COMMAND_ABORTED:
1da177e4
LT		 631 /* Carry the aborted state on to upper layer */
632 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
633 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
634 &fsf_req->qtcb->header.fsf_status_qual,
635 sizeof (union fsf_status_qual));
636 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
637 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
638 break;
639 case FSF_SQ_NO_RECOM:
1da177e4
LT		 640 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
641 "fsf_sq_no_rec");
642 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
643 "problem on the adapter %s "
644 "Stopping all operations on this adapter. ",
645 zfcp_get_busid_by_adapter(fsf_req->adapter));
646 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
647 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
648 &fsf_req->qtcb->header.fsf_status_qual,
649 sizeof (union fsf_status_qual));
650 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
651 break;
652 case FSF_SQ_ULP_PROGRAMMING_ERROR:
1da177e4
LT		 653 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
654 "(adapter %s)\n",
655 zfcp_get_busid_by_adapter(fsf_req->adapter));
656 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
657 "fsf_sq_ulp_err");
658 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
659 break;
660 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
661 case FSF_SQ_NO_RETRY_POSSIBLE:
662 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
663 /* dealt with in the respective functions */
664 break;
665 default:
666 ZFCP_LOG_NORMAL("bug: Additional status info could "
667 "not be interpreted properly.\n");
668 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
669 (char *) &fsf_req->qtcb->header.fsf_status_qual,
670 sizeof (union fsf_status_qual));
671 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
672 debug_exception(fsf_req->adapter->erp_dbf, 0,
673 &fsf_req->qtcb->header.fsf_status_qual.word[0],
674 sizeof (u32));
675 zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
676 &fsf_req->qtcb->header.fsf_status_qual,
677 sizeof (union fsf_status_qual));
678 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
679 break;
680 }
681
682 return retval;
683}
684
685/*
686 * function: zfcp_fsf_req_dispatch
687 *
688 * purpose: calls the appropriate command specific handler
689 *
690 * returns:
691 */
692static int
693zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
694{
695 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
696 struct zfcp_adapter *adapter = fsf_req->adapter;
697 int retval = 0;
698
699 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
700 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
701 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
702 (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
703 }
704
705 switch (fsf_req->fsf_command) {
706
707 case FSF_QTCB_FCP_CMND:
1da177e4
LT		 708 zfcp_fsf_send_fcp_command_handler(fsf_req);
709 break;
710
711 case FSF_QTCB_ABORT_FCP_CMND:
1da177e4
LT		 712 zfcp_fsf_abort_fcp_command_handler(fsf_req);
713 break;
714
715 case FSF_QTCB_SEND_GENERIC:
1da177e4
LT		 716 zfcp_fsf_send_ct_handler(fsf_req);
717 break;
718
719 case FSF_QTCB_OPEN_PORT_WITH_DID:
1da177e4
LT		 720 zfcp_fsf_open_port_handler(fsf_req);
721 break;
722
723 case FSF_QTCB_OPEN_LUN:
1da177e4
LT		 724 zfcp_fsf_open_unit_handler(fsf_req);
725 break;
726
727 case FSF_QTCB_CLOSE_LUN:
1da177e4
LT		 728 zfcp_fsf_close_unit_handler(fsf_req);
729 break;
730
731 case FSF_QTCB_CLOSE_PORT:
1da177e4
LT		 732 zfcp_fsf_close_port_handler(fsf_req);
733 break;
734
735 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
1da177e4
LT		 736 zfcp_fsf_close_physical_port_handler(fsf_req);
737 break;
738
739 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
1da177e4
LT		 740 zfcp_fsf_exchange_config_data_handler(fsf_req);
741 break;
742
743 case FSF_QTCB_EXCHANGE_PORT_DATA:
1da177e4
LT		 744 zfcp_fsf_exchange_port_data_handler(fsf_req);
745 break;
746
747 case FSF_QTCB_SEND_ELS:
1da177e4
LT		 748 zfcp_fsf_send_els_handler(fsf_req);
749 break;
750
751 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
1da177e4
LT		 752 zfcp_fsf_control_file_handler(fsf_req);
753 break;
754
755 case FSF_QTCB_UPLOAD_CONTROL_FILE:
1da177e4
LT		 756 zfcp_fsf_control_file_handler(fsf_req);
757 break;
758
759 default:
1da177e4
LT		 760 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
761 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
762 "not supported by the adapter %s\n",
763 zfcp_get_busid_by_adapter(fsf_req->adapter));
764 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
765 ZFCP_LOG_NORMAL
766 ("bug: Command issued by the device driver differs "
767 "from the command returned by the adapter %s "
768 "(debug info 0x%x, 0x%x).\n",
769 zfcp_get_busid_by_adapter(fsf_req->adapter),
770 fsf_req->fsf_command,
771 fsf_req->qtcb->header.fsf_command);
772 }
773
774 if (!erp_action)
775 return retval;
776
777 debug_text_event(adapter->erp_dbf, 3, "a_frh");
778 debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
779 zfcp_erp_async_handler(erp_action, 0);
780
781 return retval;
782}
783
784/*
785 * function: zfcp_fsf_status_read
786 *
787 * purpose: initiates a Status Read command at the specified adapter
788 *
789 * returns:
790 */
791int
792zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
793{
794 struct zfcp_fsf_req *fsf_req;
795 struct fsf_status_read_buffer *status_buffer;
796 unsigned long lock_flags;
797 volatile struct qdio_buffer_element *sbale;
798 int retval = 0;
799
800 /* setup new FSF request */
801 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
802 req_flags | ZFCP_REQ_NO_QTCB,
803 adapter->pool.fsf_req_status_read,
804 &lock_flags, &fsf_req);
805 if (retval < 0) {
806 ZFCP_LOG_INFO("error: Could not create unsolicited status "
807 "buffer for adapter %s.\n",
808 zfcp_get_busid_by_adapter(adapter));
809 goto failed_req_create;
810 }
811
812 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
813 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
814 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
815 fsf_req->sbale_curr = 2;
816
817 status_buffer =
818 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
819 if (!status_buffer) {
820 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
821 goto failed_buf;
822 }
823 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
059c97d0 824 fsf_req->data = (unsigned long) status_buffer;
1da177e4
LT		 825
826 /* insert pointer to respective buffer */
827 sbale = zfcp_qdio_sbale_curr(fsf_req);
828 sbale->addr = (void *) status_buffer;
829 sbale->length = sizeof(struct fsf_status_read_buffer);
830
831 /* start QDIO request for this FSF request */
832 retval = zfcp_fsf_req_send(fsf_req, NULL);
833 if (retval) {
834 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
835 "environment.\n");
836 goto failed_req_send;
837 }
838
839 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
840 zfcp_get_busid_by_adapter(adapter));
841 goto out;
842
843 failed_req_send:
844 mempool_free(status_buffer, adapter->pool.data_status_read);
845
846 failed_buf:
847 zfcp_fsf_req_free(fsf_req);
848 failed_req_create:
849 out:
850 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
851 return retval;
852}
853
854static int
855zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
856{
857 struct fsf_status_read_buffer *status_buffer;
858 struct zfcp_adapter *adapter;
859 struct zfcp_port *port;
860 unsigned long flags;
861
059c97d0 862 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 863 adapter = fsf_req->adapter;
864
865 read_lock_irqsave(&zfcp_data.config_lock, flags);
866 list_for_each_entry(port, &adapter->port_list_head, list)
867 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
868 break;
869 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
870
871 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
872 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
873 "nonexisting port with d_id 0x%08x on "
874 "adapter %s. Ignored.\n",
875 status_buffer->d_id & ZFCP_DID_MASK,
876 zfcp_get_busid_by_adapter(adapter));
877 goto out;
878 }
879
880 switch (status_buffer->status_subtype) {
881
882 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
1da177e4
LT		 883 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
884 zfcp_erp_port_reopen(port, 0);
885 break;
886
887 case FSF_STATUS_READ_SUB_ERROR_PORT:
1da177e4
LT		 888 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
889 zfcp_erp_port_shutdown(port, 0);
890 break;
891
892 default:
893 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
894 debug_exception(adapter->erp_dbf, 0,
895 &status_buffer->status_subtype, sizeof (u32));
896 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
897 "for a reopen indication on port with "
898 "d_id 0x%08x on the adapter %s. "
899 "Ignored. (debug info 0x%x)\n",
900 status_buffer->d_id,
901 zfcp_get_busid_by_adapter(adapter),
902 status_buffer->status_subtype);
903 }
904 out:
905 return 0;
906}
907
908/*
909 * function: zfcp_fsf_status_read_handler
910 *
911 * purpose: is called for finished Open Port command
912 *
913 * returns:
914 */
915static int
916zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
917{
918 int retval = 0;
919 struct zfcp_adapter *adapter = fsf_req->adapter;
920 struct fsf_status_read_buffer *status_buffer =
059c97d0 921 (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 922
923 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
924 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 925 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 926 goto out;
927 }
928
929 switch (status_buffer->status_type) {
930
931 case FSF_STATUS_READ_PORT_CLOSED:
1da177e4
LT		 932 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
933 debug_event(adapter->erp_dbf, 3,
934 &status_buffer->d_id, sizeof (u32));
935 zfcp_fsf_status_read_port_closed(fsf_req);
936 break;
937
938 case FSF_STATUS_READ_INCOMING_ELS:
1da177e4
LT		 939 debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
940 zfcp_fsf_incoming_els(fsf_req);
941 break;
942
943 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4
LT		 944 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
945 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
946 zfcp_get_busid_by_adapter(adapter));
947 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
948 sizeof(struct fsf_status_read_buffer));
949 break;
950
951 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
1da177e4
LT		 952 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
953 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
954 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
955 (char *) status_buffer,
956 sizeof (struct fsf_status_read_buffer));
957 break;
958
959 case FSF_STATUS_READ_LINK_DOWN:
1da177e4
LT		 960 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
961 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
962 zfcp_get_busid_by_adapter(adapter));
963 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
964 &adapter->status);
965 zfcp_erp_adapter_failed(adapter);
966 break;
967
968 case FSF_STATUS_READ_LINK_UP:
1da177e4
LT		 969 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
970 ZFCP_LOG_INFO("Local link to adapter %s was replugged. "
971 "Restarting operations on this adapter\n",
972 zfcp_get_busid_by_adapter(adapter));
973 /* All ports should be marked as ready to run again */
974 zfcp_erp_modify_adapter_status(adapter,
975 ZFCP_STATUS_COMMON_RUNNING,
976 ZFCP_SET);
977 zfcp_erp_adapter_reopen(adapter,
978 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
979 | ZFCP_STATUS_COMMON_ERP_FAILED);
980 break;
981
982 case FSF_STATUS_READ_CFDC_UPDATED:
1da177e4
LT		 983 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
984 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
985 zfcp_get_busid_by_adapter(adapter));
986 zfcp_erp_adapter_access_changed(adapter);
987 break;
988
989 case FSF_STATUS_READ_CFDC_HARDENED:
1da177e4
LT		 990 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
991 switch (status_buffer->status_subtype) {
992 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
993 ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n",
994 zfcp_get_busid_by_adapter(adapter));
995 break;
996 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
997 ZFCP_LOG_INFO("CFDC of adapter %s has been copied "
998 "to the secondary SE\n",
999 zfcp_get_busid_by_adapter(adapter));
1000 break;
1001 default:
1002 ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
1003 zfcp_get_busid_by_adapter(adapter));
1004 }
1005 break;
1006
1007 default:
1008 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
1009 debug_exception(adapter->erp_dbf, 0,
1010 &status_buffer->status_type, sizeof (u32));
1011 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown "
1012 "type was received (debug info 0x%x)\n",
1013 status_buffer->status_type);
1014 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1015 status_buffer);
1016 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1017 (char *) status_buffer,
1018 sizeof (struct fsf_status_read_buffer));
1019 break;
1020 }
1021 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 1022 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 1023 /*
1024 * recycle buffer and start new request repeat until outbound
1025 * queue is empty or adapter shutdown is requested
1026 */
1027 /*
1028 * FIXME(qdio):
1029 * we may wait in the req_create for 5s during shutdown, so
1030 * qdio_cleanup will have to wait at least that long before returning
1031 * with failure to allow us a proper cleanup under all circumstances
1032 */
1033 /*
1034 * FIXME:
1035 * allocation failure possible? (Is this code needed?)
1036 */
1037 retval = zfcp_fsf_status_read(adapter, 0);
1038 if (retval < 0) {
1039 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1040 "request for the adapter %s.\n",
1041 zfcp_get_busid_by_adapter(adapter));
1042 /* temporary fix to avoid status read buffer shortage */
1043 adapter->status_read_failed++;
1044 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1045 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1046 ZFCP_LOG_INFO("restart adapter %s due to status read "
1047 "buffer shortage\n",
1048 zfcp_get_busid_by_adapter(adapter));
1049 zfcp_erp_adapter_reopen(adapter, 0);
1050 }
1051 }
1052 out:
1053 return retval;
1054}
1055
1056/*
1057 * function: zfcp_fsf_abort_fcp_command
1058 *
1059 * purpose: tells FSF to abort a running SCSI command
1060 *
1061 * returns: address of initiated FSF request
1062 * NULL - request could not be initiated
1063 *
1064 * FIXME(design): should be watched by a timeout !!!
1065 * FIXME(design) shouldn't this be modified to return an int
1066 * also...don't know how though
1067 */
1068struct zfcp_fsf_req *
1069zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1070 struct zfcp_adapter *adapter,
1071 struct zfcp_unit *unit, int req_flags)
1072{
1073 volatile struct qdio_buffer_element *sbale;
1074 unsigned long lock_flags;
1075 struct zfcp_fsf_req *fsf_req = NULL;
1076 int retval = 0;
1077
1078 /* setup new FSF request */
1079 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1080 req_flags, adapter->pool.fsf_req_abort,
1081 &lock_flags, &fsf_req);
1082 if (retval < 0) {
1083 ZFCP_LOG_INFO("error: Failed to create an abort command "
1084 "request for lun 0x%016Lx on port 0x%016Lx "
1085 "on adapter %s.\n",
1086 unit->fcp_lun,
1087 unit->port->wwpn,
1088 zfcp_get_busid_by_adapter(adapter));
1089 goto out;
1090 }
1091
1092 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1093 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1094 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1095
059c97d0 1096 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 1097
1098 /* set handles of unit and its parent port in QTCB */
1099 fsf_req->qtcb->header.lun_handle = unit->handle;
1100 fsf_req->qtcb->header.port_handle = unit->port->handle;
1101
1102 /* set handle of request which should be aborted */
1103 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1104
1105 /* start QDIO request for this FSF request */
1106
1107 zfcp_fsf_start_scsi_er_timer(adapter);
1108 retval = zfcp_fsf_req_send(fsf_req, NULL);
1109 if (retval) {
1110 del_timer(&adapter->scsi_er_timer);
1111 ZFCP_LOG_INFO("error: Failed to send abort command request "
1112 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1113 zfcp_get_busid_by_adapter(adapter),
1114 unit->port->wwpn, unit->fcp_lun);
1115 zfcp_fsf_req_free(fsf_req);
1116 fsf_req = NULL;
1117 goto out;
1118 }
1119
1120 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1121 "(adapter%s, port d_id=0x%08x, "
1122 "unit x%016Lx, old_req_id=0x%lx)\n",
1123 zfcp_get_busid_by_adapter(adapter),
1124 unit->port->d_id,
1125 unit->fcp_lun, old_req_id);
1126 out:
1127 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1128 return fsf_req;
1129}
1130
1131/*
1132 * function: zfcp_fsf_abort_fcp_command_handler
1133 *
1134 * purpose: is called for finished Abort FCP Command request
1135 *
1136 * returns:
1137 */
1138static int
1139zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1140{
1141 int retval = -EINVAL;
059c97d0 1142 struct zfcp_unit *unit;
1da177e4
LT		 1143 unsigned char status_qual =
1144 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1145
1146 del_timer(&new_fsf_req->adapter->scsi_er_timer);
1147
1148 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1149 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1150 goto skip_fsfstatus;
1151 }
1152
059c97d0
AH		 1153 unit = (struct zfcp_unit *) new_fsf_req->data;
1154
1da177e4
LT		 1155 /* evaluate FSF status in QTCB */
1156 switch (new_fsf_req->qtcb->header.fsf_status) {
1157
1158 case FSF_PORT_HANDLE_NOT_VALID:
1159 if (status_qual >> 4 != status_qual % 0xf) {
1da177e4
LT		 1160 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1161 "fsf_s_phand_nv0");
1162 /*
1163 * In this case a command that was sent prior to a port
1164 * reopen was aborted (handles are different). This is
1165 * fine.
1166 */
1167 } else {
1da177e4
LT		 1168 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1169 "port 0x%016Lx on adapter %s invalid. "
1170 "This may happen occasionally.\n",
1171 unit->port->handle,
1172 unit->port->wwpn,
1173 zfcp_get_busid_by_unit(unit));
1174 ZFCP_LOG_INFO("status qualifier:\n");
1175 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1176 (char *) &new_fsf_req->qtcb->header.
1177 fsf_status_qual,
1178 sizeof (union fsf_status_qual));
1179 /* Let's hope this sorts out the mess */
1180 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1181 "fsf_s_phand_nv1");
1182 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1183 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1184 }
1185 break;
1186
1187 case FSF_LUN_HANDLE_NOT_VALID:
1188 if (status_qual >> 4 != status_qual % 0xf) {
1189 /* 2 */
1da177e4
LT		 1190 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1191 "fsf_s_lhand_nv0");
1192 /*
1193 * In this case a command that was sent prior to a unit
1194 * reopen was aborted (handles are different).
1195 * This is fine.
1196 */
1197 } else {
1da177e4
LT		 1198 ZFCP_LOG_INFO
1199 ("Warning: Temporary LUN identifier 0x%x of LUN "
1200 "0x%016Lx on port 0x%016Lx on adapter %s is "
1201 "invalid. This may happen in rare cases. "
1202 "Trying to re-establish link.\n",
1203 unit->handle,
1204 unit->fcp_lun,
1205 unit->port->wwpn,
1206 zfcp_get_busid_by_unit(unit));
1207 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1208 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1209 (char *) &new_fsf_req->qtcb->header.
1210 fsf_status_qual,
1211 sizeof (union fsf_status_qual));
1212 /* Let's hope this sorts out the mess */
1213 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1214 "fsf_s_lhand_nv1");
1215 zfcp_erp_port_reopen(unit->port, 0);
1216 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1217 }
1218 break;
1219
1220 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1da177e4
LT		 1221 retval = 0;
1222 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1223 "fsf_s_no_exist");
1224 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1225 break;
1226
1227 case FSF_PORT_BOXED:
1da177e4
LT		 1228 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1229 "be reopened\n", unit->port->wwpn,
1230 zfcp_get_busid_by_unit(unit));
1231 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1232 "fsf_s_pboxed");
d736a27b 1233 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 1234 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1235 | ZFCP_STATUS_FSFREQ_RETRY;
1236 break;
1237
1238 case FSF_LUN_BOXED:
1da177e4
LT		 1239 ZFCP_LOG_INFO(
1240 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1241 "to be reopened\n",
1242 unit->fcp_lun, unit->port->wwpn,
1243 zfcp_get_busid_by_unit(unit));
1244 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 1245 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 1246 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1247 | ZFCP_STATUS_FSFREQ_RETRY;
1248 break;
1249
1250 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1251 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1252 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1253 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1254 "fsf_sq_ltest");
65a8d4e1 1255 zfcp_test_link(unit->port);
1da177e4
LT		 1256 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1257 break;
1258 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1259 /* SCSI stack will escalate */
1260 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1261 "fsf_sq_ulp");
1262 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1263 break;
1264 default:
1265 ZFCP_LOG_NORMAL
1266 ("bug: Wrong status qualifier 0x%x arrived.\n",
1267 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1268 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1269 "fsf_sq_inval:");
1270 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1271 &new_fsf_req->qtcb->header.
1272 fsf_status_qual.word[0], sizeof (u32));
1273 break;
1274 }
1275 break;
1276
1277 case FSF_GOOD:
1da177e4
LT		 1278 retval = 0;
1279 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1280 break;
1281
1282 default:
1283 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1284 "(debug info 0x%x)\n",
1285 new_fsf_req->qtcb->header.fsf_status);
1286 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1287 "fsf_s_inval:");
1288 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1289 &new_fsf_req->qtcb->header.fsf_status,
1290 sizeof (u32));
1291 break;
1292 }
1293 skip_fsfstatus:
1294 return retval;
1295}
1296
1297/**
1298 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1299 * one SBALE
1300 * Two scatter-gather lists are passed, one for the reqeust and one for the
1301 * response.
1302 */
1303static inline int
1304zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1305 struct scatterlist *resp, int resp_count)
1306{
1307 return ((req_count == 1) &&
1308 (resp_count == 1) &&
1309 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1310 PAGE_MASK) ==
1311 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1312 req[0].length - 1) & PAGE_MASK)) &&
1313 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1314 PAGE_MASK) ==
1315 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1316 resp[0].length - 1) & PAGE_MASK)));
1317}
1318
1319/**
1320 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1321 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1322 * the request
1323 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1324 * a struct zfcp_fsf_req
1325 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1326 * is sent within error recovery
1327 */
1328int
1329zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1330 struct zfcp_erp_action *erp_action)
1331{
1332 volatile struct qdio_buffer_element *sbale;
1333 struct zfcp_port *port;
1334 struct zfcp_adapter *adapter;
1335 struct zfcp_fsf_req *fsf_req;
1336 unsigned long lock_flags;
1337 int bytes;
1338 int ret = 0;
1339
1340 port = ct->port;
1341 adapter = port->adapter;
1342
1343 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1344 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1345 pool, &lock_flags, &fsf_req);
1346 if (ret < 0) {
1347 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1348 "adapter: %s\n",
1349 zfcp_get_busid_by_adapter(adapter));
1350 goto failed_req;
1351 }
1352
1353 if (erp_action != NULL) {
1354 erp_action->fsf_req = fsf_req;
1355 fsf_req->erp_action = erp_action;
1356 }
1357
1358 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1359 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1360 ct->resp, ct->resp_count)){
1361 /* both request buffer and response buffer
1362 fit into one sbale each */
1363 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1364 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1365 sbale[2].length = ct->req[0].length;
1366 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1367 sbale[3].length = ct->resp[0].length;
1368 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1369 } else if (adapter->supported_features &
1370 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1371 /* try to use chained SBALs */
1372 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1373 SBAL_FLAGS0_TYPE_WRITE_READ,
1374 ct->req, ct->req_count,
1375 ZFCP_MAX_SBALS_PER_CT_REQ);
1376 if (bytes <= 0) {
1377 ZFCP_LOG_INFO("error: creation of CT request failed "
1378 "on adapter %s\n",
1379 zfcp_get_busid_by_adapter(adapter));
1380 if (bytes == 0)
1381 ret = -ENOMEM;
1382 else
1383 ret = bytes;
1384
1385 goto failed_send;
1386 }
1387 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1388 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1389 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1390 SBAL_FLAGS0_TYPE_WRITE_READ,
1391 ct->resp, ct->resp_count,
1392 ZFCP_MAX_SBALS_PER_CT_REQ);
1393 if (bytes <= 0) {
1394 ZFCP_LOG_INFO("error: creation of CT request failed "
1395 "on adapter %s\n",
1396 zfcp_get_busid_by_adapter(adapter));
1397 if (bytes == 0)
1398 ret = -ENOMEM;
1399 else
1400 ret = bytes;
1401
1402 goto failed_send;
1403 }
1404 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1405 } else {
1406 /* reject send generic request */
1407 ZFCP_LOG_INFO(
1408 "error: microcode does not support chained SBALs,"
1409 "CT request too big (adapter %s)\n",
1410 zfcp_get_busid_by_adapter(adapter));
1411 ret = -EOPNOTSUPP;
1412 goto failed_send;
1413 }
1414
1415 /* settings in QTCB */
1416 fsf_req->qtcb->header.port_handle = port->handle;
1417 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1418 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
059c97d0 1419 fsf_req->data = (unsigned long) ct;
1da177e4
LT		 1420
1421 /* start QDIO request for this FSF request */
1422 ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1423 if (ret) {
1424 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1425 "(adapter %s, port 0x%016Lx)\n",
1426 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1427 goto failed_send;
1428 }
1429
1430 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1431 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1432 goto out;
1433
1434 failed_send:
1435 zfcp_fsf_req_free(fsf_req);
1436 if (erp_action != NULL) {
1437 erp_action->fsf_req = NULL;
1438 }
1439 failed_req:
1440 out:
1441 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1442 lock_flags);
1443 return ret;
1444}
1445
1446/**
1447 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1448 * @fsf_req: pointer to struct zfcp_fsf_req
1449 *
059c97d0
AH		 1450 * Data specific for the Generic Service request is passed using
1451 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1452 * Usually a specific handler for the CT request is called which is
1453 * found in this structure.
1da177e4
LT		 1454 */
1455static int
1456zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1457{
1458 struct zfcp_port *port;
1459 struct zfcp_adapter *adapter;
1460 struct zfcp_send_ct *send_ct;
1461 struct fsf_qtcb_header *header;
1462 struct fsf_qtcb_bottom_support *bottom;
1463 int retval = -EINVAL;
1464 u16 subtable, rule, counter;
1465
1466 adapter = fsf_req->adapter;
059c97d0 1467 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1da177e4
LT		 1468 port = send_ct->port;
1469 header = &fsf_req->qtcb->header;
1470 bottom = &fsf_req->qtcb->bottom.support;
1471
1472 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1473 goto skip_fsfstatus;
1474
1475 /* evaluate FSF status in QTCB */
1476 switch (header->fsf_status) {
1477
1478 case FSF_GOOD:
1da177e4
LT		 1479 retval = 0;
1480 break;
1481
1482 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 1483 if (adapter->fc_service_class <= 3) {
1484 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1485 "class %d.\n",
1486 zfcp_get_busid_by_port(port),
1487 adapter->fc_service_class);
1488 } else {
1489 ZFCP_LOG_INFO("bug: The fibre channel class at the "
1490 "adapter %s is invalid. "
1491 "(debug info %d)\n",
1492 zfcp_get_busid_by_port(port),
1493 adapter->fc_service_class);
1494 }
1495 /* stop operation for this adapter */
1496 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1497 zfcp_erp_adapter_shutdown(adapter, 0);
1498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1499 break;
1500
1501 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1502 switch (header->fsf_status_qual.word[0]){
1503 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1504 /* reopening link to port */
1505 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1506 zfcp_test_link(port);
1507 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1508 break;
1509 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1510 /* ERP strategy will escalate */
1511 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1512 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1513 break;
1514 default:
1515 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1516 "arrived.\n",
1517 header->fsf_status_qual.word[0]);
1518 break;
1519 }
1520 break;
1521
1522 case FSF_ACCESS_DENIED:
1da177e4
LT		 1523 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1524 "command (adapter %s, port d_id=0x%08x)\n",
1525 zfcp_get_busid_by_port(port), port->d_id);
1526 for (counter = 0; counter < 2; counter++) {
1527 subtable = header->fsf_status_qual.halfword[counter * 2];
1528 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1529 switch (subtable) {
1530 case FSF_SQ_CFDC_SUBTABLE_OS:
1531 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1532 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1533 case FSF_SQ_CFDC_SUBTABLE_LUN:
1534 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1535 zfcp_act_subtable_type[subtable], rule);
1536 break;
1537 }
1538 }
1539 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1540 zfcp_erp_port_access_denied(port);
1541 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1542 break;
1543
1544 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4
LT		 1545 ZFCP_LOG_INFO("generic service command rejected "
1546 "(adapter %s, port d_id=0x%08x)\n",
1547 zfcp_get_busid_by_port(port), port->d_id);
1548 ZFCP_LOG_INFO("status qualifier:\n");
1549 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1550 (char *) &header->fsf_status_qual,
1551 sizeof (union fsf_status_qual));
1552 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1553 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1554 break;
1555
1556 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 1557 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1558 "0x%016Lx on adapter %s invalid. This may "
1559 "happen occasionally.\n", port->handle,
1560 port->wwpn, zfcp_get_busid_by_port(port));
1561 ZFCP_LOG_INFO("status qualifier:\n");
1562 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1563 (char *) &header->fsf_status_qual,
1564 sizeof (union fsf_status_qual));
1565 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1566 zfcp_erp_adapter_reopen(adapter, 0);
1567 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1568 break;
1569
1570 case FSF_PORT_BOXED:
1da177e4
LT		 1571 ZFCP_LOG_INFO("port needs to be reopened "
1572 "(adapter %s, port d_id=0x%08x)\n",
1573 zfcp_get_busid_by_port(port), port->d_id);
1574 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 1575 zfcp_erp_port_boxed(port);
1da177e4
LT		 1576 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1577 | ZFCP_STATUS_FSFREQ_RETRY;
1578 break;
1579
1580 /* following states should never occure, all cases avoided
1581 in zfcp_fsf_send_ct - but who knows ... */
1582 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1583 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1584 "req_buf_length=%d, resp_buf_length=%d)\n",
1585 zfcp_get_busid_by_adapter(adapter),
1586 bottom->req_buf_length, bottom->resp_buf_length);
1587 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588 break;
1589 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1590 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1591 "req_buf_length=%d)\n",
1592 zfcp_get_busid_by_adapter(adapter),
1593 bottom->req_buf_length);
1594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595 break;
1596 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1597 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1598 "resp_buf_length=%d)\n",
1599 zfcp_get_busid_by_adapter(adapter),
1600 bottom->resp_buf_length);
1601 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1602 break;
1603 case FSF_SBAL_MISMATCH:
1da177e4
LT		 1604 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1605 "resp_buf_length=%d)\n",
1606 zfcp_get_busid_by_adapter(adapter),
1607 bottom->req_buf_length, bottom->resp_buf_length);
1608 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1609 break;
1610
1611 default:
1612 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1613 "(debug info 0x%x)\n", header->fsf_status);
1614 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1615 debug_exception(adapter->erp_dbf, 0,
1616 &header->fsf_status_qual.word[0], sizeof (u32));
1617 break;
1618 }
1619
1620skip_fsfstatus:
1621 send_ct->status = retval;
1622
1623 if (send_ct->handler != NULL)
1624 send_ct->handler(send_ct->handler_data);
1625
1626 return retval;
1627}
1628
1629/**
1630 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1631 * @els: pointer to struct zfcp_send_els which contains all needed data for
1632 * the command.
1633 */
1634int
1635zfcp_fsf_send_els(struct zfcp_send_els *els)
1636{
1637 volatile struct qdio_buffer_element *sbale;
1638 struct zfcp_fsf_req *fsf_req;
1639 fc_id_t d_id;
1640 struct zfcp_adapter *adapter;
1641 unsigned long lock_flags;
1642 int bytes;
1643 int ret = 0;
1644
1645 d_id = els->d_id;
1646 adapter = els->adapter;
1647
1648 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1649 ZFCP_REQ_AUTO_CLEANUP,
1650 NULL, &lock_flags, &fsf_req);
1651 if (ret < 0) {
1652 ZFCP_LOG_INFO("error: creation of ELS request failed "
1653 "(adapter %s, port d_id: 0x%08x)\n",
1654 zfcp_get_busid_by_adapter(adapter), d_id);
1655 goto failed_req;
1656 }
1657
1658 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1659 if (zfcp_use_one_sbal(els->req, els->req_count,
1660 els->resp, els->resp_count)){
1661 /* both request buffer and response buffer
1662 fit into one sbale each */
1663 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1664 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1665 sbale[2].length = els->req[0].length;
1666 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1667 sbale[3].length = els->resp[0].length;
1668 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1669 } else if (adapter->supported_features &
1670 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1671 /* try to use chained SBALs */
1672 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1673 SBAL_FLAGS0_TYPE_WRITE_READ,
1674 els->req, els->req_count,
1675 ZFCP_MAX_SBALS_PER_ELS_REQ);
1676 if (bytes <= 0) {
1677 ZFCP_LOG_INFO("error: creation of ELS request failed "
1678 "(adapter %s, port d_id: 0x%08x)\n",
1679 zfcp_get_busid_by_adapter(adapter), d_id);
1680 if (bytes == 0) {
1681 ret = -ENOMEM;
1682 } else {
1683 ret = bytes;
1684 }
1685 goto failed_send;
1686 }
1687 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1688 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1689 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1690 SBAL_FLAGS0_TYPE_WRITE_READ,
1691 els->resp, els->resp_count,
1692 ZFCP_MAX_SBALS_PER_ELS_REQ);
1693 if (bytes <= 0) {
1694 ZFCP_LOG_INFO("error: creation of ELS request failed "
1695 "(adapter %s, port d_id: 0x%08x)\n",
1696 zfcp_get_busid_by_adapter(adapter), d_id);
1697 if (bytes == 0) {
1698 ret = -ENOMEM;
1699 } else {
1700 ret = bytes;
1701 }
1702 goto failed_send;
1703 }
1704 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1705 } else {
1706 /* reject request */
1707 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1708 ", ELS request too big (adapter %s, "
1709 "port d_id: 0x%08x)\n",
1710 zfcp_get_busid_by_adapter(adapter), d_id);
1711 ret = -EOPNOTSUPP;
1712 goto failed_send;
1713 }
1714
1715 /* settings in QTCB */
1716 fsf_req->qtcb->bottom.support.d_id = d_id;
1717 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1718 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
059c97d0 1719 fsf_req->data = (unsigned long) els;
1da177e4
LT		 1720
1721 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1722
1723 /* start QDIO request for this FSF request */
1724 ret = zfcp_fsf_req_send(fsf_req, els->timer);
1725 if (ret) {
1726 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1727 "(adapter %s, port d_id: 0x%08x)\n",
1728 zfcp_get_busid_by_adapter(adapter), d_id);
1729 goto failed_send;
1730 }
1731
1732 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1733 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1734 goto out;
1735
1736 failed_send:
1737 zfcp_fsf_req_free(fsf_req);
1738
1739 failed_req:
1740 out:
1741 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1742 lock_flags);
1743
1744 return ret;
1745}
1746
1747/**
1748 * zfcp_fsf_send_els_handler - handler for ELS commands
1749 * @fsf_req: pointer to struct zfcp_fsf_req
1750 *
059c97d0
AH		 1751 * Data specific for the ELS command is passed using
1752 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1753 * Usually a specific handler for the ELS command is called which is
1754 * found in this structure.
1da177e4
LT		 1755 */
1756static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1757{
1758 struct zfcp_adapter *adapter;
1da177e4 1759 struct zfcp_port *port;
64b29a13 1760 fc_id_t d_id;
1da177e4
LT		 1761 struct fsf_qtcb_header *header;
1762 struct fsf_qtcb_bottom_support *bottom;
1763 struct zfcp_send_els *send_els;
1764 int retval = -EINVAL;
1765 u16 subtable, rule, counter;
1766
059c97d0 1767 send_els = (struct zfcp_send_els *) fsf_req->data;
1da177e4 1768 adapter = send_els->adapter;
64b29a13 1769 port = send_els->port;
1da177e4
LT		 1770 d_id = send_els->d_id;
1771 header = &fsf_req->qtcb->header;
1772 bottom = &fsf_req->qtcb->bottom.support;
1773
1774 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1775 goto skip_fsfstatus;
1776
1777 switch (header->fsf_status) {
1778
1779 case FSF_GOOD:
1da177e4
LT		 1780 retval = 0;
1781 break;
1782
1783 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 1784 if (adapter->fc_service_class <= 3) {
1785 ZFCP_LOG_INFO("error: adapter %s does "
1786 "not support fibrechannel class %d.\n",
1787 zfcp_get_busid_by_adapter(adapter),
1788 adapter->fc_service_class);
1789 } else {
1790 ZFCP_LOG_INFO("bug: The fibrechannel class at "
1791 "adapter %s is invalid. "
1792 "(debug info %d)\n",
1793 zfcp_get_busid_by_adapter(adapter),
1794 adapter->fc_service_class);
1795 }
1796 /* stop operation for this adapter */
1797 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1798 zfcp_erp_adapter_shutdown(adapter, 0);
1799 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1800 break;
1801
1802 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1803 switch (header->fsf_status_qual.word[0]){
1804 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1805 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
64b29a13
AH		 1806 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1807 zfcp_test_link(port);
1da177e4
LT		 1808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1809 break;
1810 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1811 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1812 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1813 retval =
1814 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1815 (struct zfcp_ls_rjt_par *)
1816 &header->fsf_status_qual.word[2]);
1817 break;
1818 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 1819 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1820 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1821 break;
1822 default:
1823 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1824 header->fsf_status_qual.word[0]);
1825 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1826 (char*)header->fsf_status_qual.word, 16);
1827 }
1828 break;
1829
1830 case FSF_ELS_COMMAND_REJECTED:
1da177e4
LT		 1831 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1832 "prohibited sending "
1833 "(adapter: %s, port d_id: 0x%08x)\n",
1834 zfcp_get_busid_by_adapter(adapter), d_id);
1835
1836 break;
1837
1838 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1839 ZFCP_LOG_INFO(
1840 "ELS request size and ELS response size must be either "
1841 "both 0, or both greater than 0 "
1842 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1843 zfcp_get_busid_by_adapter(adapter),
1844 bottom->req_buf_length,
1845 bottom->resp_buf_length);
1846 break;
1847
1848 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1849 ZFCP_LOG_INFO(
1850 "Length of the ELS request buffer, "
1851 "specified in QTCB bottom, "
1852 "exceeds the size of the buffers "
1853 "that have been allocated for ELS request data "
1854 "(adapter: %s, req_buf_length=%d)\n",
1855 zfcp_get_busid_by_adapter(adapter),
1856 bottom->req_buf_length);
1857 break;
1858
1859 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1860 ZFCP_LOG_INFO(
1861 "Length of the ELS response buffer, "
1862 "specified in QTCB bottom, "
1863 "exceeds the size of the buffers "
1864 "that have been allocated for ELS response data "
1865 "(adapter: %s, resp_buf_length=%d)\n",
1866 zfcp_get_busid_by_adapter(adapter),
1867 bottom->resp_buf_length);
1868 break;
1869
1870 case FSF_SBAL_MISMATCH:
1871 /* should never occure, avoided in zfcp_fsf_send_els */
1da177e4
LT		 1872 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1873 "resp_buf_length=%d)\n",
1874 zfcp_get_busid_by_adapter(adapter),
1875 bottom->req_buf_length, bottom->resp_buf_length);
1876 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1877 break;
1878
1879 case FSF_ACCESS_DENIED:
1da177e4
LT		 1880 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1881 "(adapter %s, port d_id=0x%08x)\n",
1882 zfcp_get_busid_by_adapter(adapter), d_id);
1883 for (counter = 0; counter < 2; counter++) {
1884 subtable = header->fsf_status_qual.halfword[counter * 2];
1885 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1886 switch (subtable) {
1887 case FSF_SQ_CFDC_SUBTABLE_OS:
1888 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1889 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1890 case FSF_SQ_CFDC_SUBTABLE_LUN:
1891 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1892 zfcp_act_subtable_type[subtable], rule);
1893 break;
1894 }
1895 }
1896 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1da177e4
LT		 1897 if (port != NULL)
1898 zfcp_erp_port_access_denied(port);
1da177e4
LT		 1899 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1900 break;
1901
1902 default:
1903 ZFCP_LOG_NORMAL(
1904 "bug: An unknown FSF Status was presented "
1905 "(adapter: %s, fsf_status=0x%08x)\n",
1906 zfcp_get_busid_by_adapter(adapter),
1907 header->fsf_status);
1908 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1909 debug_exception(adapter->erp_dbf, 0,
1910 &header->fsf_status_qual.word[0], sizeof(u32));
1911 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912 break;
1913 }
1914
1915skip_fsfstatus:
1916 send_els->status = retval;
1917
1918 if (send_els->handler != 0)
1919 send_els->handler(send_els->handler_data);
1920
1921 return retval;
1922}
1923
1924/*
1925 * function:
1926 *
1927 * purpose:
1928 *
1929 * returns: address of initiated FSF request
1930 * NULL - request could not be initiated
1931 */
1932int
1933zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1934{
1935 volatile struct qdio_buffer_element *sbale;
1936 unsigned long lock_flags;
1937 int retval = 0;
1938
1939 /* setup new FSF request */
1940 retval = zfcp_fsf_req_create(erp_action->adapter,
1941 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1942 ZFCP_REQ_AUTO_CLEANUP,
1943 erp_action->adapter->pool.fsf_req_erp,
1944 &lock_flags, &(erp_action->fsf_req));
1945 if (retval < 0) {
1946 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1947 "data request for adapter %s.\n",
1948 zfcp_get_busid_by_adapter(erp_action->adapter));
1949 goto out;
1950 }
1951
1952 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
1953 erp_action->fsf_req->sbal_curr, 0);
1954 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1955 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1956
1957 erp_action->fsf_req->erp_action = erp_action;
1958 erp_action->fsf_req->qtcb->bottom.config.feature_selection =
1959 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
1960
1961 /* start QDIO request for this FSF request */
1962 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
1963 if (retval) {
1964 ZFCP_LOG_INFO
1965 ("error: Could not send exchange configuration data "
1966 "command on the adapter %s\n",
1967 zfcp_get_busid_by_adapter(erp_action->adapter));
1968 zfcp_fsf_req_free(erp_action->fsf_req);
1969 erp_action->fsf_req = NULL;
1970 goto out;
1971 }
1972
1973 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1974 "(adapter %s)\n",
1975 zfcp_get_busid_by_adapter(erp_action->adapter));
1976
1977 out:
1978 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
1979 lock_flags);
1980 return retval;
1981}
1982
1983/**
1984 * zfcp_fsf_exchange_config_evaluate
1985 * @fsf_req: fsf_req which belongs to xchg config data request
1986 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1987 *
1988 * returns: -EIO on error, 0 otherwise
1989 */
1990static int
1991zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1992{
1993 struct fsf_qtcb_bottom_config *bottom;
1994 struct zfcp_adapter *adapter = fsf_req->adapter;
1995
1996 bottom = &fsf_req->qtcb->bottom.config;
1997 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
1998 bottom->low_qtcb_version, bottom->high_qtcb_version);
1999 adapter->fsf_lic_version = bottom->lic_version;
2000 adapter->supported_features = bottom->supported_features;
6f71d9bc 2001 adapter->peer_wwpn = 0;
2002 adapter->peer_wwnn = 0;
2003 adapter->peer_d_id = 0;
1da177e4
LT		 2004
2005 if (xchg_ok) {
2006 adapter->wwnn = bottom->nport_serv_param.wwnn;
2007 adapter->wwpn = bottom->nport_serv_param.wwpn;
2008 adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
2009 adapter->fc_topology = bottom->fc_topology;
2010 adapter->fc_link_speed = bottom->fc_link_speed;
2011 adapter->hydra_version = bottom->adapter_type;
2012 } else {
2013 adapter->wwnn = 0;
2014 adapter->wwpn = 0;
2015 adapter->s_id = 0;
2016 adapter->fc_topology = 0;
2017 adapter->fc_link_speed = 0;
2018 adapter->hydra_version = 0;
2019 }
2020
6f71d9bc 2021 if (adapter->fc_topology == FSF_TOPO_P2P) {
2022 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2023 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2024 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2025 }
2026
1da177e4
LT		 2027 if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
2028 adapter->hardware_version = bottom->hardware_version;
2029 memcpy(adapter->serial_number, bottom->serial_number, 17);
2030 EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
2031 }
2032
6f71d9bc 2033 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
1da177e4
LT		 2034 "WWNN 0x%016Lx, "
2035 "WWPN 0x%016Lx, "
2036 "S_ID 0x%08x,\n"
2037 "adapter version 0x%x, "
2038 "LIC version 0x%x, "
2039 "FC link speed %d Gb/s\n",
2040 zfcp_get_busid_by_adapter(adapter),
2041 adapter->wwnn,
2042 adapter->wwpn,
2043 (unsigned int) adapter->s_id,
2044 adapter->hydra_version,
2045 adapter->fsf_lic_version,
2046 adapter->fc_link_speed);
2047 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2048 ZFCP_LOG_NORMAL("error: the adapter %s "
2049 "only supports newer control block "
2050 "versions in comparison to this device "
2051 "driver (try updated device driver)\n",
2052 zfcp_get_busid_by_adapter(adapter));
2053 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2054 zfcp_erp_adapter_shutdown(adapter, 0);
2055 return -EIO;
2056 }
2057 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2058 ZFCP_LOG_NORMAL("error: the adapter %s "
2059 "only supports older control block "
2060 "versions than this device driver uses"
2061 "(consider a microcode upgrade)\n",
2062 zfcp_get_busid_by_adapter(adapter));
2063 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2064 zfcp_erp_adapter_shutdown(adapter, 0);
2065 return -EIO;
2066 }
3859f6a2 2067 zfcp_set_fc_host_attrs(adapter);
1da177e4
LT		 2068 return 0;
2069}
2070
2071/*
2072 * function: zfcp_fsf_exchange_config_data_handler
2073 *
2074 * purpose: is called for finished Exchange Configuration Data command
2075 *
2076 * returns:
2077 */
2078static int
2079zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2080{
2081 struct fsf_qtcb_bottom_config *bottom;
2082 struct zfcp_adapter *adapter = fsf_req->adapter;
2083
2084 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2085 return -EIO;
2086
2087 switch (fsf_req->qtcb->header.fsf_status) {
2088
2089 case FSF_GOOD:
1da177e4
LT		 2090 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2091 return -EIO;
2092
2093 switch (adapter->fc_topology) {
2094 case FSF_TOPO_P2P:
6f71d9bc 2095 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2096 "configuration detected at adapter %s\n"
2097 "Peer WWNN 0x%016llx, "
2098 "peer WWPN 0x%016llx, "
2099 "peer d_id 0x%06x\n",
2100 zfcp_get_busid_by_adapter(adapter),
2101 adapter->peer_wwnn,
2102 adapter->peer_wwpn,
2103 adapter->peer_d_id);
1da177e4
LT		 2104 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2105 "top-p-to-p");
6f71d9bc 2106 break;
1da177e4 2107 case FSF_TOPO_AL:
1da177e4
LT		 2108 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2109 "topology detected at adapter %s "
2110 "unsupported, shutting down adapter\n",
2111 zfcp_get_busid_by_adapter(adapter));
2112 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2113 "top-al");
2114 zfcp_erp_adapter_shutdown(adapter, 0);
2115 return -EIO;
2116 case FSF_TOPO_FABRIC:
1da177e4
LT		 2117 ZFCP_LOG_INFO("Switched fabric fibrechannel "
2118 "network detected at adapter %s.\n",
2119 zfcp_get_busid_by_adapter(adapter));
2120 break;
2121 default:
2122 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2123 "reported by the exchange "
2124 "configuration command for "
2125 "the adapter %s is not "
2126 "of a type known to the zfcp "
2127 "driver, shutting down adapter\n",
2128 zfcp_get_busid_by_adapter(adapter));
6f71d9bc 2129 adapter->fc_topology = FSF_TOPO_ERROR;
1da177e4
LT		 2130 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2131 "unknown-topo");
2132 zfcp_erp_adapter_shutdown(adapter, 0);
2133 return -EIO;
2134 }
2135 bottom = &fsf_req->qtcb->bottom.config;
2136 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2137 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2138 "allowed by the adapter %s "
2139 "is lower than the minimum "
2140 "required by the driver (%ld bytes).\n",
2141 bottom->max_qtcb_size,
2142 zfcp_get_busid_by_adapter(adapter),
2143 sizeof(struct fsf_qtcb));
2144 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2145 "qtcb-size");
2146 debug_event(fsf_req->adapter->erp_dbf, 0,
2147 &bottom->max_qtcb_size, sizeof (u32));
2148 zfcp_erp_adapter_shutdown(adapter, 0);
2149 return -EIO;
2150 }
2151 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2152 &adapter->status);
2153 break;
2154 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2155 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2156
2157 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2158 return -EIO;
2159
2160 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2161 zfcp_get_busid_by_adapter(adapter));
2162 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2163 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2164 &adapter->status);
2165 zfcp_erp_adapter_failed(adapter);
2166 break;
2167 default:
2168 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2169 debug_event(fsf_req->adapter->erp_dbf, 0,
2170 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2171 zfcp_erp_adapter_shutdown(adapter, 0);
2172 return -EIO;
2173 }
2174 return 0;
2175}
2176
2177/**
2178 * zfcp_fsf_exchange_port_data - request information about local port
2179 * @adapter: for which port data is requested
2180 * @data: response to exchange port data request
2181 */
2182int
2183zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2184 struct fsf_qtcb_bottom_port *data)
2185{
2186 volatile struct qdio_buffer_element *sbale;
2187 int retval = 0;
2188 unsigned long lock_flags;
2189 struct zfcp_fsf_req *fsf_req;
2190 struct timer_list *timer;
2191
2192 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2193 ZFCP_LOG_INFO("error: exchange port data "
2194 "command not supported by adapter %s\n",
2195 zfcp_get_busid_by_adapter(adapter));
2196 return -EOPNOTSUPP;
2197 }
2198
2199 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2200 if (!timer)
2201 return -ENOMEM;
2202
2203 /* setup new FSF request */
2204 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2205 0, 0, &lock_flags, &fsf_req);
2206 if (retval < 0) {
2207 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2208 "exchange port data request for"
2209 "the adapter %s.\n",
2210 zfcp_get_busid_by_adapter(adapter));
2211 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2212 lock_flags);
2213 goto out;
2214 }
2215
059c97d0
AH		 2216 fsf_req->data = (unsigned long) data;
2217
1da177e4
LT		 2218 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2219 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2220 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2221
1da177e4
LT		 2222 init_timer(timer);
2223 timer->function = zfcp_fsf_request_timeout_handler;
2224 timer->data = (unsigned long) adapter;
2225 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2226
2227 retval = zfcp_fsf_req_send(fsf_req, timer);
2228 if (retval) {
2229 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2230 "command on the adapter %s\n",
2231 zfcp_get_busid_by_adapter(adapter));
2232 zfcp_fsf_req_free(fsf_req);
2233 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2234 lock_flags);
2235 goto out;
2236 }
2237
2238 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2239 zfcp_get_busid_by_adapter(adapter));
2240
2241 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2242 lock_flags);
2243
2244 wait_event(fsf_req->completion_wq,
2245 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2246 del_timer_sync(timer);
1db2c9c0 2247 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2248 out:
2249 kfree(timer);
2250 return retval;
2251}
2252
2253
2254/**
2255 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2256 * @fsf_req: pointer to struct zfcp_fsf_req
2257 */
2258static void
2259zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2260{
2261 struct fsf_qtcb_bottom_port *bottom;
059c97d0
AH		 2262 struct fsf_qtcb_bottom_port *data;
2263
2264 data = (struct fsf_qtcb_bottom_port*) fsf_req->data;
1da177e4
LT		 2265
2266 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2267 return;
2268
2269 switch (fsf_req->qtcb->header.fsf_status) {
2270 case FSF_GOOD:
1da177e4
LT		 2271 bottom = &fsf_req->qtcb->bottom.port;
2272 memcpy(data, bottom, sizeof(*data));
2273 break;
2274
2275 default:
2276 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2277 debug_event(fsf_req->adapter->erp_dbf, 0,
2278 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2279 }
2280}
2281
2282
2283/*
2284 * function: zfcp_fsf_open_port
2285 *
2286 * purpose:
2287 *
2288 * returns: address of initiated FSF request
2289 * NULL - request could not be initiated
2290 */
2291int
2292zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2293{
2294 volatile struct qdio_buffer_element *sbale;
2295 unsigned long lock_flags;
2296 int retval = 0;
2297
2298 /* setup new FSF request */
2299 retval = zfcp_fsf_req_create(erp_action->adapter,
2300 FSF_QTCB_OPEN_PORT_WITH_DID,
2301 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2302 erp_action->adapter->pool.fsf_req_erp,
2303 &lock_flags, &(erp_action->fsf_req));
2304 if (retval < 0) {
2305 ZFCP_LOG_INFO("error: Could not create open port request "
2306 "for port 0x%016Lx on adapter %s.\n",
2307 erp_action->port->wwpn,
2308 zfcp_get_busid_by_adapter(erp_action->adapter));
2309 goto out;
2310 }
2311
2312 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2313 erp_action->fsf_req->sbal_curr, 0);
2314 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2315 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2316
2317 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2318 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
059c97d0 2319 erp_action->fsf_req->data = (unsigned long) erp_action->port;
1da177e4
LT		 2320 erp_action->fsf_req->erp_action = erp_action;
2321
2322 /* start QDIO request for this FSF request */
2323 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2324 if (retval) {
2325 ZFCP_LOG_INFO("error: Could not send open port request for "
2326 "port 0x%016Lx on adapter %s.\n",
2327 erp_action->port->wwpn,
2328 zfcp_get_busid_by_adapter(erp_action->adapter));
2329 zfcp_fsf_req_free(erp_action->fsf_req);
2330 erp_action->fsf_req = NULL;
2331 goto out;
2332 }
2333
2334 ZFCP_LOG_DEBUG("open port request initiated "
2335 "(adapter %s, port 0x%016Lx)\n",
2336 zfcp_get_busid_by_adapter(erp_action->adapter),
2337 erp_action->port->wwpn);
2338 out:
2339 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2340 lock_flags);
2341 return retval;
2342}
2343
2344/*
2345 * function: zfcp_fsf_open_port_handler
2346 *
2347 * purpose: is called for finished Open Port command
2348 *
2349 * returns:
2350 */
2351static int
2352zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2353{
2354 int retval = -EINVAL;
2355 struct zfcp_port *port;
2356 struct fsf_plogi *plogi;
2357 struct fsf_qtcb_header *header;
2358 u16 subtable, rule, counter;
2359
059c97d0 2360 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2361 header = &fsf_req->qtcb->header;
2362
2363 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2364 /* don't change port status in our bookkeeping */
2365 goto skip_fsfstatus;
2366 }
2367
2368 /* evaluate FSF status in QTCB */
2369 switch (header->fsf_status) {
2370
2371 case FSF_PORT_ALREADY_OPEN:
1da177e4
LT		 2372 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2373 "is already open.\n",
2374 port->wwpn, zfcp_get_busid_by_port(port));
2375 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2376 "fsf_s_popen");
2377 /*
2378 * This is a bug, however operation should continue normally
2379 * if it is simply ignored
2380 */
2381 break;
2382
2383 case FSF_ACCESS_DENIED:
1da177e4
LT		 2384 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2385 "on adapter %s\n",
2386 port->wwpn, zfcp_get_busid_by_port(port));
2387 for (counter = 0; counter < 2; counter++) {
2388 subtable = header->fsf_status_qual.halfword[counter * 2];
2389 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2390 switch (subtable) {
2391 case FSF_SQ_CFDC_SUBTABLE_OS:
2392 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2393 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2394 case FSF_SQ_CFDC_SUBTABLE_LUN:
2395 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2396 zfcp_act_subtable_type[subtable], rule);
2397 break;
2398 }
2399 }
2400 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2401 zfcp_erp_port_access_denied(port);
2402 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2403 break;
2404
2405 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1da177e4
LT		 2406 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2407 "The remote port 0x%016Lx on adapter %s "
2408 "could not be opened. Disabling it.\n",
2409 port->wwpn, zfcp_get_busid_by_port(port));
2410 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2411 "fsf_s_max_ports");
2412 zfcp_erp_port_failed(port);
2413 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2414 break;
2415
2416 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2417 switch (header->fsf_status_qual.word[0]) {
2418 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2419 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2420 "fsf_sq_ltest");
2421 /* ERP strategy will escalate */
2422 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2423 break;
2424 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2425 /* ERP strategy will escalate */
2426 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2427 "fsf_sq_ulp");
2428 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2429 break;
2430 case FSF_SQ_NO_RETRY_POSSIBLE:
1da177e4
LT		 2431 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2432 "adapter %s could not be opened. "
2433 "Disabling it.\n",
2434 port->wwpn,
2435 zfcp_get_busid_by_port(port));
2436 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2437 "fsf_sq_no_retry");
2438 zfcp_erp_port_failed(port);
2439 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2440 break;
2441 default:
2442 ZFCP_LOG_NORMAL
2443 ("bug: Wrong status qualifier 0x%x arrived.\n",
2444 header->fsf_status_qual.word[0]);
2445 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2446 "fsf_sq_inval:");
2447 debug_exception(
2448 fsf_req->adapter->erp_dbf, 0,
2449 &header->fsf_status_qual.word[0],
2450 sizeof (u32));
2451 break;
2452 }
2453 break;
2454
2455 case FSF_GOOD:
1da177e4
LT		 2456 /* save port handle assigned by FSF */
2457 port->handle = header->port_handle;
2458 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2459 "was opened, it's port handle is 0x%x\n",
2460 port->wwpn, zfcp_get_busid_by_port(port),
2461 port->handle);
2462 /* mark port as open */
2463 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2464 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 2465 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2466 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2467 &port->status);
1da177e4
LT		 2468 retval = 0;
2469 /* check whether D_ID has changed during open */
2470 /*
2471 * FIXME: This check is not airtight, as the FCP channel does
2472 * not monitor closures of target port connections caused on
2473 * the remote side. Thus, they might miss out on invalidating
2474 * locally cached WWPNs (and other N_Port parameters) of gone
2475 * target ports. So, our heroic attempt to make things safe
2476 * could be undermined by 'open port' response data tagged with
2477 * obsolete WWPNs. Another reason to monitor potential
2478 * connection closures ourself at least (by interpreting
2479 * incoming ELS' and unsolicited status). It just crosses my
2480 * mind that one should be able to cross-check by means of
2481 * another GID_PN straight after a port has been opened.
2482 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2483 */
2484 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2485 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2486 {
2487 if (fsf_req->qtcb->bottom.support.els1_length <
2488 ((((unsigned long) &plogi->serv_param.wwpn) -
2489 ((unsigned long) plogi)) + sizeof (u64))) {
2490 ZFCP_LOG_INFO(
2491 "warning: insufficient length of "
2492 "PLOGI payload (%i)\n",
2493 fsf_req->qtcb->bottom.support.els1_length);
2494 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2495 "fsf_s_short_plogi:");
2496 /* skip sanity check and assume wwpn is ok */
2497 } else {
2498 if (plogi->serv_param.wwpn != port->wwpn) {
2499 ZFCP_LOG_INFO("warning: d_id of port "
2500 "0x%016Lx changed during "
2501 "open\n", port->wwpn);
2502 debug_text_event(
2503 fsf_req->adapter->erp_dbf, 0,
2504 "fsf_s_did_change:");
2505 atomic_clear_mask(
2506 ZFCP_STATUS_PORT_DID_DID,
2507 &port->status);
2508 } else
2509 port->wwnn = plogi->serv_param.wwnn;
2510 }
2511 }
2512 break;
2513
2514 case FSF_UNKNOWN_OP_SUBTYPE:
2515 /* should never occure, subtype not set in zfcp_fsf_open_port */
1da177e4
LT		 2516 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2517 "op_subtype=0x%x)\n",
2518 zfcp_get_busid_by_port(port),
2519 fsf_req->qtcb->bottom.support.operation_subtype);
2520 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2521 break;
2522
2523 default:
2524 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2525 "(debug info 0x%x)\n",
2526 header->fsf_status);
2527 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2528 debug_exception(fsf_req->adapter->erp_dbf, 0,
2529 &header->fsf_status, sizeof (u32));
2530 break;
2531 }
2532
2533 skip_fsfstatus:
2534 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2535 return retval;
2536}
2537
2538/*
2539 * function: zfcp_fsf_close_port
2540 *
2541 * purpose: submit FSF command "close port"
2542 *
2543 * returns: address of initiated FSF request
2544 * NULL - request could not be initiated
2545 */
2546int
2547zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2548{
2549 volatile struct qdio_buffer_element *sbale;
2550 unsigned long lock_flags;
2551 int retval = 0;
2552
2553 /* setup new FSF request */
2554 retval = zfcp_fsf_req_create(erp_action->adapter,
2555 FSF_QTCB_CLOSE_PORT,
2556 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2557 erp_action->adapter->pool.fsf_req_erp,
2558 &lock_flags, &(erp_action->fsf_req));
2559 if (retval < 0) {
2560 ZFCP_LOG_INFO("error: Could not create a close port request "
2561 "for port 0x%016Lx on adapter %s.\n",
2562 erp_action->port->wwpn,
2563 zfcp_get_busid_by_adapter(erp_action->adapter));
2564 goto out;
2565 }
2566
2567 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2568 erp_action->fsf_req->sbal_curr, 0);
2569 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2570 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2571
2572 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
059c97d0 2573 erp_action->fsf_req->data = (unsigned long) erp_action->port;
1da177e4
LT		 2574 erp_action->fsf_req->erp_action = erp_action;
2575 erp_action->fsf_req->qtcb->header.port_handle =
2576 erp_action->port->handle;
2577
2578 /* start QDIO request for this FSF request */
2579 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2580 if (retval) {
2581 ZFCP_LOG_INFO("error: Could not send a close port request for "
2582 "port 0x%016Lx on adapter %s.\n",
2583 erp_action->port->wwpn,
2584 zfcp_get_busid_by_adapter(erp_action->adapter));
2585 zfcp_fsf_req_free(erp_action->fsf_req);
2586 erp_action->fsf_req = NULL;
2587 goto out;
2588 }
2589
2590 ZFCP_LOG_TRACE("close port request initiated "
2591 "(adapter %s, port 0x%016Lx)\n",
2592 zfcp_get_busid_by_adapter(erp_action->adapter),
2593 erp_action->port->wwpn);
2594 out:
2595 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2596 lock_flags);
2597 return retval;
2598}
2599
2600/*
2601 * function: zfcp_fsf_close_port_handler
2602 *
2603 * purpose: is called for finished Close Port FSF command
2604 *
2605 * returns:
2606 */
2607static int
2608zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2609{
2610 int retval = -EINVAL;
2611 struct zfcp_port *port;
2612
059c97d0 2613 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2614
2615 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2616 /* don't change port status in our bookkeeping */
2617 goto skip_fsfstatus;
2618 }
2619
2620 /* evaluate FSF status in QTCB */
2621 switch (fsf_req->qtcb->header.fsf_status) {
2622
2623 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2624 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2625 "0x%016Lx on adapter %s invalid. This may happen "
2626 "occasionally.\n", port->handle,
2627 port->wwpn, zfcp_get_busid_by_port(port));
2628 ZFCP_LOG_DEBUG("status qualifier:\n");
2629 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2630 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2631 sizeof (union fsf_status_qual));
2632 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2633 "fsf_s_phand_nv");
2634 zfcp_erp_adapter_reopen(port->adapter, 0);
2635 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2636 break;
2637
2638 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2639 /* Note: FSF has actually closed the port in this case.
2640 * The status code is just daft. Fingers crossed for a change
2641 */
2642 retval = 0;
2643 break;
2644
2645 case FSF_GOOD:
1da177e4
LT		 2646 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2647 "port handle 0x%x\n", port->wwpn,
2648 zfcp_get_busid_by_port(port), port->handle);
2649 zfcp_erp_modify_port_status(port,
2650 ZFCP_STATUS_COMMON_OPEN,
2651 ZFCP_CLEAR);
2652 retval = 0;
2653 break;
2654
2655 default:
2656 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2657 "(debug info 0x%x)\n",
2658 fsf_req->qtcb->header.fsf_status);
2659 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2660 debug_exception(fsf_req->adapter->erp_dbf, 0,
2661 &fsf_req->qtcb->header.fsf_status,
2662 sizeof (u32));
2663 break;
2664 }
2665
2666 skip_fsfstatus:
2667 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2668 return retval;
2669}
2670
2671/*
2672 * function: zfcp_fsf_close_physical_port
2673 *
2674 * purpose: submit FSF command "close physical port"
2675 *
2676 * returns: address of initiated FSF request
2677 * NULL - request could not be initiated
2678 */
2679int
2680zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2681{
2682 int retval = 0;
2683 unsigned long lock_flags;
2684 volatile struct qdio_buffer_element *sbale;
2685
2686 /* setup new FSF request */
2687 retval = zfcp_fsf_req_create(erp_action->adapter,
2688 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2689 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2690 erp_action->adapter->pool.fsf_req_erp,
2691 &lock_flags, &erp_action->fsf_req);
2692 if (retval < 0) {
2693 ZFCP_LOG_INFO("error: Could not create close physical port "
2694 "request (adapter %s, port 0x%016Lx)\n",
2695 zfcp_get_busid_by_adapter(erp_action->adapter),
2696 erp_action->port->wwpn);
2697
2698 goto out;
2699 }
2700
2701 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2702 erp_action->fsf_req->sbal_curr, 0);
2703 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2704 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2705
2706 /* mark port as being closed */
2707 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2708 &erp_action->port->status);
2709 /* save a pointer to this port */
059c97d0 2710 erp_action->fsf_req->data = (unsigned long) erp_action->port;
1da177e4
LT		 2711 /* port to be closeed */
2712 erp_action->fsf_req->qtcb->header.port_handle =
2713 erp_action->port->handle;
2714 erp_action->fsf_req->erp_action = erp_action;
2715
2716 /* start QDIO request for this FSF request */
2717 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2718 if (retval) {
2719 ZFCP_LOG_INFO("error: Could not send 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 zfcp_fsf_req_free(erp_action->fsf_req);
2724 erp_action->fsf_req = NULL;
2725 goto out;
2726 }
2727
2728 ZFCP_LOG_TRACE("close physical port request initiated "
2729 "(adapter %s, port 0x%016Lx)\n",
2730 zfcp_get_busid_by_adapter(erp_action->adapter),
2731 erp_action->port->wwpn);
2732 out:
2733 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2734 lock_flags);
2735 return retval;
2736}
2737
2738/*
2739 * function: zfcp_fsf_close_physical_port_handler
2740 *
2741 * purpose: is called for finished Close Physical Port FSF command
2742 *
2743 * returns:
2744 */
2745static int
2746zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2747{
2748 int retval = -EINVAL;
2749 struct zfcp_port *port;
2750 struct zfcp_unit *unit;
2751 struct fsf_qtcb_header *header;
2752 u16 subtable, rule, counter;
2753
059c97d0 2754 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2755 header = &fsf_req->qtcb->header;
2756
2757 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2758 /* don't change port status in our bookkeeping */
2759 goto skip_fsfstatus;
2760 }
2761
2762 /* evaluate FSF status in QTCB */
2763 switch (header->fsf_status) {
2764
2765 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2766 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2767 "(adapter %s, port 0x%016Lx). "
2768 "This may happen occasionally.\n",
2769 port->handle,
2770 zfcp_get_busid_by_port(port),
2771 port->wwpn);
2772 ZFCP_LOG_DEBUG("status qualifier:\n");
2773 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2774 (char *) &header->fsf_status_qual,
2775 sizeof (union fsf_status_qual));
2776 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2777 "fsf_s_phand_nv");
2778 zfcp_erp_adapter_reopen(port->adapter, 0);
2779 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2780 break;
2781
2782 case FSF_ACCESS_DENIED:
1da177e4
LT		 2783 ZFCP_LOG_NORMAL("Access denied, cannot close "
2784 "physical port 0x%016Lx on adapter %s\n",
2785 port->wwpn, zfcp_get_busid_by_port(port));
2786 for (counter = 0; counter < 2; counter++) {
2787 subtable = header->fsf_status_qual.halfword[counter * 2];
2788 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2789 switch (subtable) {
2790 case FSF_SQ_CFDC_SUBTABLE_OS:
2791 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2792 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2793 case FSF_SQ_CFDC_SUBTABLE_LUN:
2794 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2795 zfcp_act_subtable_type[subtable], rule);
2796 break;
2797 }
2798 }
2799 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2800 zfcp_erp_port_access_denied(port);
2801 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2802 break;
2803
2804 case FSF_PORT_BOXED:
1da177e4
LT		 2805 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2806 "%s needs to be reopened but it was attempted "
2807 "to close it physically.\n",
2808 port->wwpn,
2809 zfcp_get_busid_by_port(port));
2810 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
d736a27b 2811 zfcp_erp_port_boxed(port);
1da177e4
LT		 2812 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2813 ZFCP_STATUS_FSFREQ_RETRY;
2814 break;
2815
2816 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2817 switch (header->fsf_status_qual.word[0]) {
2818 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2819 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2820 "fsf_sq_ltest");
2821 /* This will now be escalated by ERP */
2822 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2823 break;
2824 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 2825 /* ERP strategy will escalate */
2826 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2827 "fsf_sq_ulp");
2828 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2829 break;
2830 default:
2831 ZFCP_LOG_NORMAL
2832 ("bug: Wrong status qualifier 0x%x arrived.\n",
2833 header->fsf_status_qual.word[0]);
2834 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2835 "fsf_sq_inval:");
2836 debug_exception(
2837 fsf_req->adapter->erp_dbf, 0,
2838 &header->fsf_status_qual.word[0], sizeof (u32));
2839 break;
2840 }
2841 break;
2842
2843 case FSF_GOOD:
1da177e4
LT		 2844 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2845 "physically closed, port handle 0x%x\n",
2846 port->wwpn,
2847 zfcp_get_busid_by_port(port), port->handle);
2848 /* can't use generic zfcp_erp_modify_port_status because
2849 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2850 */
2851 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2852 list_for_each_entry(unit, &port->unit_list_head, list)
2853 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2854 retval = 0;
2855 break;
2856
2857 default:
2858 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2859 "(debug info 0x%x)\n",
2860 header->fsf_status);
2861 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2862 debug_exception(fsf_req->adapter->erp_dbf, 0,
2863 &header->fsf_status, sizeof (u32));
2864 break;
2865 }
2866
2867 skip_fsfstatus:
2868 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2869 return retval;
2870}
2871
2872/*
2873 * function: zfcp_fsf_open_unit
2874 *
2875 * purpose:
2876 *
2877 * returns:
2878 *
2879 * assumptions: This routine does not check whether the associated
2880 * remote port has already been opened. This should be
2881 * done by calling routines. Otherwise some status
2882 * may be presented by FSF
2883 */
2884int
2885zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2886{
2887 volatile struct qdio_buffer_element *sbale;
2888 unsigned long lock_flags;
2889 int retval = 0;
2890
2891 /* setup new FSF request */
2892 retval = zfcp_fsf_req_create(erp_action->adapter,
2893 FSF_QTCB_OPEN_LUN,
2894 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2895 erp_action->adapter->pool.fsf_req_erp,
2896 &lock_flags, &(erp_action->fsf_req));
2897 if (retval < 0) {
2898 ZFCP_LOG_INFO("error: Could not create open unit request for "
2899 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2900 erp_action->unit->fcp_lun,
2901 erp_action->unit->port->wwpn,
2902 zfcp_get_busid_by_adapter(erp_action->adapter));
2903 goto out;
2904 }
2905
2906 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2907 erp_action->fsf_req->sbal_curr, 0);
2908 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2909 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2910
2911 erp_action->fsf_req->qtcb->header.port_handle =
2912 erp_action->port->handle;
2913 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
2914 erp_action->unit->fcp_lun;
2915 erp_action->fsf_req->qtcb->bottom.support.option =
2916 FSF_OPEN_LUN_SUPPRESS_BOXING;
2917 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
059c97d0 2918 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
1da177e4
LT		 2919 erp_action->fsf_req->erp_action = erp_action;
2920
2921 /* start QDIO request for this FSF request */
2922 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2923 if (retval) {
2924 ZFCP_LOG_INFO("error: Could not send an open unit request "
2925 "on the adapter %s, port 0x%016Lx for "
2926 "unit 0x%016Lx\n",
2927 zfcp_get_busid_by_adapter(erp_action->adapter),
2928 erp_action->port->wwpn,
2929 erp_action->unit->fcp_lun);
2930 zfcp_fsf_req_free(erp_action->fsf_req);
2931 erp_action->fsf_req = NULL;
2932 goto out;
2933 }
2934
2935 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2936 "port 0x%016Lx, unit 0x%016Lx)\n",
2937 zfcp_get_busid_by_adapter(erp_action->adapter),
2938 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2939 out:
2940 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2941 lock_flags);
2942 return retval;
2943}
2944
2945/*
2946 * function: zfcp_fsf_open_unit_handler
2947 *
2948 * purpose: is called for finished Open LUN command
2949 *
2950 * returns:
2951 */
2952static int
2953zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2954{
2955 int retval = -EINVAL;
2956 struct zfcp_adapter *adapter;
2957 struct zfcp_unit *unit;
2958 struct fsf_qtcb_header *header;
2959 struct fsf_qtcb_bottom_support *bottom;
2960 struct fsf_queue_designator *queue_designator;
2961 u16 subtable, rule, counter;
2962 u32 allowed, exclusive, readwrite;
2963
059c97d0 2964 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 2965
2966 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2967 /* don't change unit status in our bookkeeping */
2968 goto skip_fsfstatus;
2969 }
2970
2971 adapter = fsf_req->adapter;
2972 header = &fsf_req->qtcb->header;
2973 bottom = &fsf_req->qtcb->bottom.support;
2974 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2975
2976 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
2977 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
2978 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
2979
2980 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2981 ZFCP_STATUS_UNIT_SHARED |
2982 ZFCP_STATUS_UNIT_READONLY,
2983 &unit->status);
2984
2985 /* evaluate FSF status in QTCB */
2986 switch (header->fsf_status) {
2987
2988 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2989 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
2990 "for port 0x%016Lx on adapter %s invalid "
2991 "This may happen occasionally\n",
2992 unit->port->handle,
2993 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
2994 ZFCP_LOG_DEBUG("status qualifier:\n");
2995 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2996 (char *) &header->fsf_status_qual,
2997 sizeof (union fsf_status_qual));
2998 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
2999 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3000 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3001 break;
3002
3003 case FSF_LUN_ALREADY_OPEN:
1da177e4
LT		 3004 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3005 "remote port 0x%016Lx on adapter %s twice.\n",
3006 unit->fcp_lun,
3007 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3008 debug_text_exception(adapter->erp_dbf, 0,
3009 "fsf_s_uopen");
3010 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3011 break;
3012
3013 case FSF_ACCESS_DENIED:
1da177e4
LT		 3014 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3015 "remote port 0x%016Lx on adapter %s\n",
3016 unit->fcp_lun, unit->port->wwpn,
3017 zfcp_get_busid_by_unit(unit));
3018 for (counter = 0; counter < 2; counter++) {
3019 subtable = header->fsf_status_qual.halfword[counter * 2];
3020 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3021 switch (subtable) {
3022 case FSF_SQ_CFDC_SUBTABLE_OS:
3023 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3024 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3025 case FSF_SQ_CFDC_SUBTABLE_LUN:
3026 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3027 zfcp_act_subtable_type[subtable], rule);
3028 break;
3029 }
3030 }
3031 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3032 zfcp_erp_unit_access_denied(unit);
3033 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3034 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3035 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3036 break;
3037
3038 case FSF_PORT_BOXED:
1da177e4
LT		 3039 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3040 "needs to be reopened\n",
3041 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3042 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3043 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3044 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3045 ZFCP_STATUS_FSFREQ_RETRY;
3046 break;
3047
3048 case FSF_LUN_SHARING_VIOLATION:
1da177e4
LT		 3049 if (header->fsf_status_qual.word[0] != 0) {
3050 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3051 "with WWPN 0x%Lx "
3052 "connected to the adapter %s "
3053 "is already in use in LPAR%d, CSS%d\n",
3054 unit->fcp_lun,
3055 unit->port->wwpn,
3056 zfcp_get_busid_by_unit(unit),
3057 queue_designator->hla,
3058 queue_designator->cssid);
3059 } else {
3060 subtable = header->fsf_status_qual.halfword[4];
3061 rule = header->fsf_status_qual.halfword[5];
3062 switch (subtable) {
3063 case FSF_SQ_CFDC_SUBTABLE_OS:
3064 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3065 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3066 case FSF_SQ_CFDC_SUBTABLE_LUN:
3067 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3068 "remote port with WWPN 0x%Lx "
3069 "connected to the adapter %s "
3070 "is denied (%s rule %d)\n",
3071 unit->fcp_lun,
3072 unit->port->wwpn,
3073 zfcp_get_busid_by_unit(unit),
3074 zfcp_act_subtable_type[subtable],
3075 rule);
3076 break;
3077 }
3078 }
3079 ZFCP_LOG_DEBUG("status qualifier:\n");
3080 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3081 (char *) &header->fsf_status_qual,
3082 sizeof (union fsf_status_qual));
3083 debug_text_event(adapter->erp_dbf, 2,
3084 "fsf_s_l_sh_vio");
3085 zfcp_erp_unit_access_denied(unit);
3086 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3087 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3088 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3089 break;
3090
3091 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1da177e4
LT		 3092 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3093 "There is no handle (temporary port identifier) "
3094 "available for unit 0x%016Lx on port 0x%016Lx "
3095 "on adapter %s\n",
3096 unit->fcp_lun,
3097 unit->port->wwpn,
3098 zfcp_get_busid_by_unit(unit));
3099 debug_text_event(adapter->erp_dbf, 1,
3100 "fsf_s_max_units");
3101 zfcp_erp_unit_failed(unit);
3102 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3103 break;
3104
3105 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3106 switch (header->fsf_status_qual.word[0]) {
3107 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3108 /* Re-establish link to port */
3109 debug_text_event(adapter->erp_dbf, 1,
3110 "fsf_sq_ltest");
65a8d4e1 3111 zfcp_test_link(unit->port);
1da177e4
LT		 3112 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3113 break;
3114 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3115 /* ERP strategy will escalate */
3116 debug_text_event(adapter->erp_dbf, 1,
3117 "fsf_sq_ulp");
3118 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3119 break;
3120 default:
3121 ZFCP_LOG_NORMAL
3122 ("bug: Wrong status qualifier 0x%x arrived.\n",
3123 header->fsf_status_qual.word[0]);
3124 debug_text_event(adapter->erp_dbf, 0,
3125 "fsf_sq_inval:");
3126 debug_exception(adapter->erp_dbf, 0,
3127 &header->fsf_status_qual.word[0],
3128 sizeof (u32));
3129 }
3130 break;
3131
3132 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 3133 ZFCP_LOG_NORMAL(
3134 "Invalid option 0x%x has been specified "
3135 "in QTCB bottom sent to the adapter %s\n",
3136 bottom->option,
3137 zfcp_get_busid_by_adapter(adapter));
3138 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3139 retval = -EINVAL;
3140 break;
3141
3142 case FSF_GOOD:
1da177e4
LT		 3143 /* save LUN handle assigned by FSF */
3144 unit->handle = header->lun_handle;
3145 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3146 "adapter %s opened, port handle 0x%x\n",
3147 unit->fcp_lun,
3148 unit->port->wwpn,
3149 zfcp_get_busid_by_unit(unit),
3150 unit->handle);
3151 /* mark unit as open */
3152 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
d736a27b
AH		 3153 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3154 ZFCP_STATUS_COMMON_ACCESS_BOXED,
3155 &unit->status);
1da177e4
LT		 3156 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3157 if (!exclusive)
3158 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3159 &unit->status);
3160
3161 if (!readwrite) {
3162 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3163 &unit->status);
3164 ZFCP_LOG_NORMAL("read-only access for unit "
3165 "(adapter %s, wwpn=0x%016Lx, "
3166 "fcp_lun=0x%016Lx)\n",
3167 zfcp_get_busid_by_unit(unit),
3168 unit->port->wwpn,
3169 unit->fcp_lun);
3170 }
3171
3172 if (exclusive && !readwrite) {
3173 ZFCP_LOG_NORMAL("exclusive access of read-only "
3174 "unit not supported\n");
3175 zfcp_erp_unit_failed(unit);
3176 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3177 zfcp_erp_unit_shutdown(unit, 0);
3178 } else if (!exclusive && readwrite) {
3179 ZFCP_LOG_NORMAL("shared access of read-write "
3180 "unit not supported\n");
3181 zfcp_erp_unit_failed(unit);
3182 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3183 zfcp_erp_unit_shutdown(unit, 0);
3184 }
3185 }
3186
3187 retval = 0;
3188 break;
3189
3190 default:
3191 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3192 "(debug info 0x%x)\n",
3193 header->fsf_status);
3194 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3195 debug_exception(adapter->erp_dbf, 0,
3196 &header->fsf_status, sizeof (u32));
3197 break;
3198 }
3199
3200 skip_fsfstatus:
3201 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3202 return retval;
3203}
3204
3205/*
3206 * function: zfcp_fsf_close_unit
3207 *
3208 * purpose:
3209 *
3210 * returns: address of fsf_req - request successfully initiated
3211 * NULL -
3212 *
3213 * assumptions: This routine does not check whether the associated
3214 * remote port/lun has already been opened. This should be
3215 * done by calling routines. Otherwise some status
3216 * may be presented by FSF
3217 */
3218int
3219zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3220{
3221 volatile struct qdio_buffer_element *sbale;
3222 unsigned long lock_flags;
3223 int retval = 0;
3224
3225 /* setup new FSF request */
3226 retval = zfcp_fsf_req_create(erp_action->adapter,
3227 FSF_QTCB_CLOSE_LUN,
3228 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3229 erp_action->adapter->pool.fsf_req_erp,
3230 &lock_flags, &(erp_action->fsf_req));
3231 if (retval < 0) {
3232 ZFCP_LOG_INFO("error: Could not create close unit request for "
3233 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3234 erp_action->unit->fcp_lun,
3235 erp_action->port->wwpn,
3236 zfcp_get_busid_by_adapter(erp_action->adapter));
3237 goto out;
3238 }
3239
3240 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3241 erp_action->fsf_req->sbal_curr, 0);
3242 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3243 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3244
3245 erp_action->fsf_req->qtcb->header.port_handle =
3246 erp_action->port->handle;
3247 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3248 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
059c97d0 3249 erp_action->fsf_req->data = (unsigned long) erp_action->unit;
1da177e4
LT		 3250 erp_action->fsf_req->erp_action = erp_action;
3251
3252 /* start QDIO request for this FSF request */
3253 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3254 if (retval) {
3255 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3256 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3257 erp_action->unit->fcp_lun,
3258 erp_action->port->wwpn,
3259 zfcp_get_busid_by_adapter(erp_action->adapter));
3260 zfcp_fsf_req_free(erp_action->fsf_req);
3261 erp_action->fsf_req = NULL;
3262 goto out;
3263 }
3264
3265 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3266 "port 0x%016Lx, unit 0x%016Lx)\n",
3267 zfcp_get_busid_by_adapter(erp_action->adapter),
3268 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3269 out:
3270 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3271 lock_flags);
3272 return retval;
3273}
3274
3275/*
3276 * function: zfcp_fsf_close_unit_handler
3277 *
3278 * purpose: is called for finished Close LUN FSF command
3279 *
3280 * returns:
3281 */
3282static int
3283zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3284{
3285 int retval = -EINVAL;
3286 struct zfcp_unit *unit;
3287
059c97d0 3288 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 3289
3290 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3291 /* don't change unit status in our bookkeeping */
3292 goto skip_fsfstatus;
3293 }
3294
3295 /* evaluate FSF status in QTCB */
3296 switch (fsf_req->qtcb->header.fsf_status) {
3297
3298 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3299 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3300 "0x%016Lx on adapter %s invalid. This may "
3301 "happen in rare circumstances\n",
3302 unit->port->handle,
3303 unit->port->wwpn,
3304 zfcp_get_busid_by_unit(unit));
3305 ZFCP_LOG_DEBUG("status qualifier:\n");
3306 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3307 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3308 sizeof (union fsf_status_qual));
3309 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3310 "fsf_s_phand_nv");
3311 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3312 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3313 &fsf_req->qtcb->header.fsf_status_qual,
3314 sizeof (union fsf_status_qual));
3315 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3316 break;
3317
3318 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3319 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3320 "0x%016Lx on port 0x%016Lx on adapter %s is "
3321 "invalid. This may happen occasionally.\n",
3322 unit->handle,
3323 unit->fcp_lun,
3324 unit->port->wwpn,
3325 zfcp_get_busid_by_unit(unit));
3326 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3327 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3328 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3329 sizeof (union fsf_status_qual));
3330 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3331 "fsf_s_lhand_nv");
3332 zfcp_erp_port_reopen(unit->port, 0);
3333 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3334 &fsf_req->qtcb->header.fsf_status_qual,
3335 sizeof (union fsf_status_qual));
3336 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3337 break;
3338
3339 case FSF_PORT_BOXED:
1da177e4
LT		 3340 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3341 "needs to be reopened\n",
3342 unit->port->wwpn,
3343 zfcp_get_busid_by_unit(unit));
3344 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3345 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3346 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3347 ZFCP_STATUS_FSFREQ_RETRY;
3348 break;
3349
3350 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3351 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3352 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3353 /* re-establish link to port */
3354 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3355 "fsf_sq_ltest");
65a8d4e1 3356 zfcp_test_link(unit->port);
1da177e4
LT		 3357 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3358 break;
3359 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3360 /* ERP strategy will escalate */
3361 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3362 "fsf_sq_ulp");
3363 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3364 break;
3365 default:
3366 ZFCP_LOG_NORMAL
3367 ("bug: Wrong status qualifier 0x%x arrived.\n",
3368 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3369 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3370 "fsf_sq_inval:");
3371 debug_exception(
3372 fsf_req->adapter->erp_dbf, 0,
3373 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3374 sizeof (u32));
3375 break;
3376 }
3377 break;
3378
3379 case FSF_GOOD:
1da177e4
LT		 3380 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3381 "closed, port handle 0x%x\n",
3382 unit->fcp_lun,
3383 unit->port->wwpn,
3384 zfcp_get_busid_by_unit(unit),
3385 unit->handle);
3386 /* mark unit as closed */
3387 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3388 retval = 0;
3389 break;
3390
3391 default:
3392 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3393 "(debug info 0x%x)\n",
3394 fsf_req->qtcb->header.fsf_status);
3395 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3396 debug_exception(fsf_req->adapter->erp_dbf, 0,
3397 &fsf_req->qtcb->header.fsf_status,
3398 sizeof (u32));
3399 break;
3400 }
3401
3402 skip_fsfstatus:
3403 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3404 return retval;
3405}
3406
3407/**
3408 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3409 * @adapter: adapter where scsi command is issued
3410 * @unit: unit where command is sent to
3411 * @scsi_cmnd: scsi command to be sent
3412 * @timer: timer to be started when request is initiated
3413 * @req_flags: flags for fsf_request
3414 */
3415int
3416zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3417 struct zfcp_unit *unit,
3418 struct scsi_cmnd * scsi_cmnd,
3419 struct timer_list *timer, int req_flags)
3420{
3421 struct zfcp_fsf_req *fsf_req = NULL;
3422 struct fcp_cmnd_iu *fcp_cmnd_iu;
3423 unsigned int sbtype;
3424 unsigned long lock_flags;
3425 int real_bytes = 0;
3426 int retval = 0;
3427 int mask;
3428
3429 /* setup new FSF request */
3430 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3431 adapter->pool.fsf_req_scsi,
3432 &lock_flags, &fsf_req);
3433 if (unlikely(retval < 0)) {
3434 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3435 "for unit 0x%016Lx on port 0x%016Lx on "
3436 "adapter %s\n",
3437 unit->fcp_lun,
3438 unit->port->wwpn,
3439 zfcp_get_busid_by_adapter(adapter));
3440 goto failed_req_create;
3441 }
3442
059c97d0
AH		 3443 zfcp_unit_get(unit);
3444 fsf_req->unit = unit;
1da177e4 3445
059c97d0
AH		 3446 /* associate FSF request with SCSI request (for look up on abort) */
3447 scsi_cmnd->host_scribble = (char *) fsf_req;
3448
3449 /* associate SCSI command with FSF request */
3450 fsf_req->data = (unsigned long) scsi_cmnd;
1da177e4
LT		 3451
3452 /* set handles of unit and its parent port in QTCB */
3453 fsf_req->qtcb->header.lun_handle = unit->handle;
3454 fsf_req->qtcb->header.port_handle = unit->port->handle;
3455
3456 /* FSF does not define the structure of the FCP_CMND IU */
3457 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3458 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3459
3460 /*
3461 * set depending on data direction:
3462 * data direction bits in SBALE (SB Type)
3463 * data direction bits in QTCB
3464 * data direction bits in FCP_CMND IU
3465 */
3466 switch (scsi_cmnd->sc_data_direction) {
3467 case DMA_NONE:
1da177e4
LT		 3468 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3469 /*
3470 * FIXME(qdio):
3471 * what is the correct type for commands
3472 * without 'real' data buffers?
3473 */
3474 sbtype = SBAL_FLAGS0_TYPE_READ;
3475 break;
3476 case DMA_FROM_DEVICE:
1da177e4
LT		 3477 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3478 sbtype = SBAL_FLAGS0_TYPE_READ;
3479 fcp_cmnd_iu->rddata = 1;
3480 break;
3481 case DMA_TO_DEVICE:
1da177e4
LT		 3482 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3483 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3484 fcp_cmnd_iu->wddata = 1;
3485 break;
3486 case DMA_BIDIRECTIONAL:
1da177e4
LT		 3487 default:
3488 /*
3489 * dummy, catch this condition earlier
3490 * in zfcp_scsi_queuecommand
3491 */
3492 goto failed_scsi_cmnd;
3493 }
3494
3495 /* set FC service class in QTCB (3 per default) */
3496 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3497
3498 /* set FCP_LUN in FCP_CMND IU in QTCB */
3499 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3500
3501 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3502
3503 /* set task attributes in FCP_CMND IU in QTCB */
3504 if (likely((scsi_cmnd->device->simple_tags) ||
3505 (atomic_test_mask(mask, &unit->status))))
3506 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3507 else
3508 fcp_cmnd_iu->task_attribute = UNTAGGED;
3509
3510 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3511 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3512 fcp_cmnd_iu->add_fcp_cdb_length
3513 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3514 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3515 "additional FCP_CDB length is 0x%x "
3516 "(shifted right 2 bits)\n",
3517 scsi_cmnd->cmd_len,
3518 fcp_cmnd_iu->add_fcp_cdb_length);
3519 }
3520 /*
3521 * copy SCSI CDB (including additional length, if any) to
3522 * FCP_CDB in FCP_CMND IU in QTCB
3523 */
3524 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3525
3526 /* FCP CMND IU length in QTCB */
3527 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3528 sizeof (struct fcp_cmnd_iu) +
3529 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3530
3531 /* generate SBALEs from data buffer */
3532 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3533 if (unlikely(real_bytes < 0)) {
3534 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3535 ZFCP_LOG_DEBUG(
3536 "Data did not fit into available buffer(s), "
3537 "waiting for more...\n");
3538 retval = -EIO;
3539 } else {
3540 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3541 "required. Shutting down unit "
3542 "(adapter %s, port 0x%016Lx, "
3543 "unit 0x%016Lx)\n",
3544 zfcp_get_busid_by_unit(unit),
3545 unit->port->wwpn,
3546 unit->fcp_lun);
3547 zfcp_erp_unit_shutdown(unit, 0);
3548 retval = -EINVAL;
3549 }
3550 goto no_fit;
3551 }
3552
3553 /* set length of FCP data length in FCP_CMND IU in QTCB */
3554 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3555
3556 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3557 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3558 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3559
3560 /*
3561 * start QDIO request for this FSF request
3562 * covered by an SBALE)
3563 */
3564 retval = zfcp_fsf_req_send(fsf_req, timer);
3565 if (unlikely(retval < 0)) {
3566 ZFCP_LOG_INFO("error: Could not send FCP command request "
3567 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3568 zfcp_get_busid_by_adapter(adapter),
3569 unit->port->wwpn,
3570 unit->fcp_lun);
3571 goto send_failed;
3572 }
3573
3574 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3575 "port 0x%016Lx, unit 0x%016Lx)\n",
3576 zfcp_get_busid_by_adapter(adapter),
3577 unit->port->wwpn,
3578 unit->fcp_lun);
3579 goto success;
3580
3581 send_failed:
3582 no_fit:
3583 failed_scsi_cmnd:
059c97d0 3584 zfcp_unit_put(unit);
1da177e4
LT		 3585 zfcp_fsf_req_free(fsf_req);
3586 fsf_req = NULL;
3587 scsi_cmnd->host_scribble = NULL;
3588 success:
3589 failed_req_create:
3590 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3591 return retval;
3592}
3593
3594/*
3595 * function: zfcp_fsf_send_fcp_command_task_management
3596 *
3597 * purpose:
3598 *
3599 * returns:
3600 *
3601 * FIXME(design): should be watched by a timeout!!!
3602 * FIXME(design) shouldn't this be modified to return an int
3603 * also...don't know how though
3604 *
3605 */
3606struct zfcp_fsf_req *
3607zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3608 struct zfcp_unit *unit,
3609 u8 tm_flags, int req_flags)
3610{
3611 struct zfcp_fsf_req *fsf_req = NULL;
3612 int retval = 0;
3613 struct fcp_cmnd_iu *fcp_cmnd_iu;
3614 unsigned long lock_flags;
3615 volatile struct qdio_buffer_element *sbale;
3616
3617 /* setup new FSF request */
3618 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3619 adapter->pool.fsf_req_scsi,
3620 &lock_flags, &fsf_req);
3621 if (retval < 0) {
3622 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3623 "management) request for adapter %s, port "
3624 " 0x%016Lx, unit 0x%016Lx.\n",
3625 zfcp_get_busid_by_adapter(adapter),
3626 unit->port->wwpn, unit->fcp_lun);
3627 goto out;
3628 }
3629
3630 /*
3631 * Used to decide on proper handler in the return path,
3632 * could be either zfcp_fsf_send_fcp_command_task_handler or
3633 * zfcp_fsf_send_fcp_command_task_management_handler */
3634
3635 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3636
3637 /*
3638 * hold a pointer to the unit being target of this
3639 * task management request
3640 */
059c97d0 3641 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 3642
3643 /* set FSF related fields in QTCB */
3644 fsf_req->qtcb->header.lun_handle = unit->handle;
3645 fsf_req->qtcb->header.port_handle = unit->port->handle;
3646 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3647 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3648 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3649 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3650
3651 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3652 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3653 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3654
3655 /* set FCP related fields in FCP_CMND IU in QTCB */
3656 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3657 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3658 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3659 fcp_cmnd_iu->task_management_flags = tm_flags;
3660
3661 /* start QDIO request for this FSF request */
3662 zfcp_fsf_start_scsi_er_timer(adapter);
3663 retval = zfcp_fsf_req_send(fsf_req, NULL);
3664 if (retval) {
3665 del_timer(&adapter->scsi_er_timer);
3666 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3667 "management) on adapter %s, port 0x%016Lx for "
3668 "unit LUN 0x%016Lx\n",
3669 zfcp_get_busid_by_adapter(adapter),
3670 unit->port->wwpn,
3671 unit->fcp_lun);
3672 zfcp_fsf_req_free(fsf_req);
3673 fsf_req = NULL;
3674 goto out;
3675 }
3676
3677 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3678 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3679 "tm_flags=0x%x)\n",
3680 zfcp_get_busid_by_adapter(adapter),
3681 unit->port->wwpn,
3682 unit->fcp_lun,
3683 tm_flags);
3684 out:
3685 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3686 return fsf_req;
3687}
3688
3689/*
3690 * function: zfcp_fsf_send_fcp_command_handler
3691 *
3692 * purpose: is called for finished Send FCP Command
3693 *
3694 * returns:
3695 */
3696static int
3697zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3698{
3699 int retval = -EINVAL;
3700 struct zfcp_unit *unit;
3701 struct fsf_qtcb_header *header;
3702 u16 subtable, rule, counter;
3703
3704 header = &fsf_req->qtcb->header;
3705
3706 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
059c97d0 3707 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 3708 else
059c97d0 3709 unit = fsf_req->unit;
1da177e4
LT		 3710
3711 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3712 /* go directly to calls of special handlers */
3713 goto skip_fsfstatus;
3714 }
3715
3716 /* evaluate FSF status in QTCB */
3717 switch (header->fsf_status) {
3718
3719 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3720 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3721 "0x%016Lx on adapter %s invalid\n",
3722 unit->port->handle,
3723 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3724 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3725 (char *) &header->fsf_status_qual,
3726 sizeof (union fsf_status_qual));
3727 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3728 "fsf_s_phand_nv");
3729 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3730 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3731 break;
3732
3733 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3734 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3735 "0x%016Lx on port 0x%016Lx on adapter %s is "
3736 "invalid. This may happen occasionally.\n",
3737 unit->handle,
3738 unit->fcp_lun,
3739 unit->port->wwpn,
3740 zfcp_get_busid_by_unit(unit));
3741 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3742 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3743 (char *) &header->fsf_status_qual,
3744 sizeof (union fsf_status_qual));
3745 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3746 "fsf_s_uhand_nv");
3747 zfcp_erp_port_reopen(unit->port, 0);
3748 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3749 break;
3750
3751 case FSF_HANDLE_MISMATCH:
1da177e4
LT		 3752 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3753 "unexpectedly. (adapter %s, port 0x%016Lx, "
3754 "unit 0x%016Lx)\n",
3755 unit->port->handle,
3756 zfcp_get_busid_by_unit(unit),
3757 unit->port->wwpn,
3758 unit->fcp_lun);
3759 ZFCP_LOG_NORMAL("status qualifier:\n");
3760 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3761 (char *) &header->fsf_status_qual,
3762 sizeof (union fsf_status_qual));
3763 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3764 "fsf_s_hand_mis");
3765 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3766 zfcp_cmd_dbf_event_fsf("handmism",
3767 fsf_req,
3768 &header->fsf_status_qual,
3769 sizeof (union fsf_status_qual));
3770 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3771 break;
3772
3773 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1da177e4
LT		 3774 if (fsf_req->adapter->fc_service_class <= 3) {
3775 ZFCP_LOG_NORMAL("error: The adapter %s does "
3776 "not support fibrechannel class %d.\n",
3777 zfcp_get_busid_by_unit(unit),
3778 fsf_req->adapter->fc_service_class);
3779 } else {
3780 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3781 "adapter %s is invalid. "
3782 "(debug info %d)\n",
3783 zfcp_get_busid_by_unit(unit),
3784 fsf_req->adapter->fc_service_class);
3785 }
3786 /* stop operation for this adapter */
3787 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3788 "fsf_s_class_nsup");
3789 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3790 zfcp_cmd_dbf_event_fsf("unsclass",
3791 fsf_req,
3792 &header->fsf_status_qual,
3793 sizeof (union fsf_status_qual));
3794 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3795 break;
3796
3797 case FSF_FCPLUN_NOT_VALID:
1da177e4
LT		 3798 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3799 "adapter %s does not have correct unit "
3800 "handle 0x%x\n",
3801 unit->fcp_lun,
3802 unit->port->wwpn,
3803 zfcp_get_busid_by_unit(unit),
3804 unit->handle);
3805 ZFCP_LOG_DEBUG("status qualifier:\n");
3806 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3807 (char *) &header->fsf_status_qual,
3808 sizeof (union fsf_status_qual));
3809 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3810 "fsf_s_fcp_lun_nv");
3811 zfcp_erp_port_reopen(unit->port, 0);
3812 zfcp_cmd_dbf_event_fsf("fluninv",
3813 fsf_req,
3814 &header->fsf_status_qual,
3815 sizeof (union fsf_status_qual));
3816 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3817 break;
3818
3819 case FSF_ACCESS_DENIED:
1da177e4
LT		 3820 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3821 "unit 0x%016Lx on port 0x%016Lx on "
3822 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3823 zfcp_get_busid_by_unit(unit));
3824 for (counter = 0; counter < 2; counter++) {
3825 subtable = header->fsf_status_qual.halfword[counter * 2];
3826 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3827 switch (subtable) {
3828 case FSF_SQ_CFDC_SUBTABLE_OS:
3829 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3830 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3831 case FSF_SQ_CFDC_SUBTABLE_LUN:
3832 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3833 zfcp_act_subtable_type[subtable], rule);
3834 break;
3835 }
3836 }
3837 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3838 zfcp_erp_unit_access_denied(unit);
3839 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3840 break;
3841
3842 case FSF_DIRECTION_INDICATOR_NOT_VALID:
1da177e4
LT		 3843 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3844 "0x%016Lx on port 0x%016Lx on adapter %s "
3845 "(debug info %d)\n",
3846 unit->fcp_lun,
3847 unit->port->wwpn,
3848 zfcp_get_busid_by_unit(unit),
3849 fsf_req->qtcb->bottom.io.data_direction);
3850 /* stop operation for this adapter */
3851 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3852 "fsf_s_dir_ind_nv");
3853 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3854 zfcp_cmd_dbf_event_fsf("dirinv",
3855 fsf_req,
3856 &header->fsf_status_qual,
3857 sizeof (union fsf_status_qual));
3858 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3859 break;
3860
3861 case FSF_CMND_LENGTH_NOT_VALID:
1da177e4
LT		 3862 ZFCP_LOG_NORMAL
3863 ("bug: An invalid control-data-block length field "
3864 "was found in a command for unit 0x%016Lx on port "
3865 "0x%016Lx on adapter %s " "(debug info %d)\n",
3866 unit->fcp_lun, unit->port->wwpn,
3867 zfcp_get_busid_by_unit(unit),
3868 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3869 /* stop operation for this adapter */
3870 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3871 "fsf_s_cmd_len_nv");
3872 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3873 zfcp_cmd_dbf_event_fsf("cleninv",
3874 fsf_req,
3875 &header->fsf_status_qual,
3876 sizeof (union fsf_status_qual));
3877 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3878 break;
3879
3880 case FSF_PORT_BOXED:
1da177e4
LT		 3881 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3882 "needs to be reopened\n",
3883 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3884 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3885 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3886 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3887 ZFCP_STATUS_FSFREQ_RETRY;
3888 break;
3889
3890 case FSF_LUN_BOXED:
1da177e4
LT		 3891 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3892 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3893 zfcp_get_busid_by_unit(unit),
3894 unit->port->wwpn, unit->fcp_lun);
3895 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 3896 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 3897 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3898 | ZFCP_STATUS_FSFREQ_RETRY;
3899 break;
3900
3901 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3902 switch (header->fsf_status_qual.word[0]) {
3903 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3904 /* re-establish link to port */
3905 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3906 "fsf_sq_ltest");
65a8d4e1 3907 zfcp_test_link(unit->port);
1da177e4
LT		 3908 break;
3909 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3910 /* FIXME(hw) need proper specs for proper action */
3911 /* let scsi stack deal with retries and escalation */
3912 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3913 "fsf_sq_ulp");
1da177e4
LT		 3914 break;
3915 default:
1da177e4 3916 ZFCP_LOG_NORMAL
516a4201 3917 ("Unknown status qualifier 0x%x arrived.\n",
1da177e4
LT		 3918 header->fsf_status_qual.word[0]);
3919 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3920 "fsf_sq_inval:");
3921 debug_exception(fsf_req->adapter->erp_dbf, 0,
3922 &header->fsf_status_qual.word[0],
3923 sizeof(u32));
3924 break;
3925 }
516a4201 3926 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 3927 break;
3928
3929 case FSF_GOOD:
1da177e4
LT		 3930 break;
3931
3932 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 3933 break;
3934
3935 default:
3936 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3937 debug_exception(fsf_req->adapter->erp_dbf, 0,
3938 &header->fsf_status, sizeof(u32));
3939 break;
3940 }
3941
3942 skip_fsfstatus:
3943 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3944 retval =
3945 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3946 } else {
3947 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
059c97d0
AH		 3948 fsf_req->unit = NULL;
3949 zfcp_unit_put(unit);
1da177e4
LT		 3950 }
3951 return retval;
3952}
3953
3954/*
3955 * function: zfcp_fsf_send_fcp_command_task_handler
3956 *
3957 * purpose: evaluates FCP_RSP IU
3958 *
3959 * returns:
3960 */
3961static int
3962zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3963{
3964 int retval = 0;
3965 struct scsi_cmnd *scpnt;
3966 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3967 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3968 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3969 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3970 u32 sns_len;
3971 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3972 unsigned long flags;
059c97d0 3973 struct zfcp_unit *unit = fsf_req->unit;
1da177e4
LT		 3974
3975 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
059c97d0 3976 scpnt = (struct scsi_cmnd *) fsf_req->data;
1da177e4
LT		 3977 if (unlikely(!scpnt)) {
3978 ZFCP_LOG_DEBUG
3979 ("Command with fsf_req %p is not associated to "
3980 "a scsi command anymore. Aborted?\n", fsf_req);
3981 goto out;
3982 }
3983 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3984 /* FIXME: (design) mid-layer should handle DID_ABORT like
3985 * DID_SOFT_ERROR by retrying the request for devices
3986 * that allow retries.
3987 */
3988 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
3989 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
3990 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
3991 goto skip_fsfstatus;
3992 }
3993
3994 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3995 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
3996 set_host_byte(&scpnt->result, DID_ERROR);
3997 goto skip_fsfstatus;
3998 }
3999
4000 /* set message byte of result in SCSI command */
4001 scpnt->result |= COMMAND_COMPLETE << 8;
4002
4003 /*
4004 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4005 * of result in SCSI command
4006 */
4007 scpnt->result |= fcp_rsp_iu->scsi_status;
4008 if (unlikely(fcp_rsp_iu->scsi_status)) {
4009 /* DEBUG */
4010 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4011 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4012 scpnt->cmnd, scpnt->cmd_len);
4013 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4014 fcp_rsp_iu->scsi_status);
4015 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4016 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4017 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4018 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4019 fcp_rsp_iu->fcp_sns_len);
4020 }
4021
4022 /* check FCP_RSP_INFO */
4023 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4024 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4025 switch (fcp_rsp_info[3]) {
4026 case RSP_CODE_GOOD:
1da177e4
LT		 4027 /* ok, continue */
4028 ZFCP_LOG_TRACE("no failure or Task Management "
4029 "Function complete\n");
4030 set_host_byte(&scpnt->result, DID_OK);
4031 break;
4032 case RSP_CODE_LENGTH_MISMATCH:
1da177e4
LT		 4033 /* hardware bug */
4034 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4035 "that the fibrechannel protocol data "
4036 "length differs from the burst length. "
4037 "The problem occured on unit 0x%016Lx "
4038 "on port 0x%016Lx on adapter %s",
4039 unit->fcp_lun,
4040 unit->port->wwpn,
4041 zfcp_get_busid_by_unit(unit));
4042 /* dump SCSI CDB as prepared by zfcp */
4043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4044 (char *) &fsf_req->qtcb->
4045 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4046 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4047 set_host_byte(&scpnt->result, DID_ERROR);
4048 goto skip_fsfstatus;
4049 case RSP_CODE_FIELD_INVALID:
1da177e4
LT		 4050 /* driver or hardware bug */
4051 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4052 "that the fibrechannel protocol data "
4053 "fields were incorrectly set up. "
4054 "The problem occured on the unit "
4055 "0x%016Lx on port 0x%016Lx on "
4056 "adapter %s",
4057 unit->fcp_lun,
4058 unit->port->wwpn,
4059 zfcp_get_busid_by_unit(unit));
4060 /* dump SCSI CDB as prepared by zfcp */
4061 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4062 (char *) &fsf_req->qtcb->
4063 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4064 set_host_byte(&scpnt->result, DID_ERROR);
4065 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4066 goto skip_fsfstatus;
4067 case RSP_CODE_RO_MISMATCH:
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);
4082 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4083 set_host_byte(&scpnt->result, DID_ERROR);
4084 goto skip_fsfstatus;
4085 default:
4086 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4087 "code was detected for a command. "
4088 "The problem occured on the unit "
4089 "0x%016Lx on port 0x%016Lx on "
4090 "adapter %s (debug info 0x%x)\n",
4091 unit->fcp_lun,
4092 unit->port->wwpn,
4093 zfcp_get_busid_by_unit(unit),
4094 fcp_rsp_info[3]);
4095 /* dump SCSI CDB as prepared by zfcp */
4096 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4097 (char *) &fsf_req->qtcb->
4098 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4099 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4100 set_host_byte(&scpnt->result, DID_ERROR);
6f71d9bc 4101 goto skip_fsfstatus;
1da177e4
LT		 4102 }
4103 }
4104
4105 /* check for sense data */
4106 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4107 sns_len = FSF_FCP_RSP_SIZE -
4108 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4109 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4110 sns_len);
4111 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4112 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4113 SCSI_SENSE_BUFFERSIZE);
4114 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4115 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4116 scpnt->result);
4117 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4118 (void *) &scpnt->cmnd, scpnt->cmd_len);
4119
4120 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4121 fcp_rsp_iu->fcp_sns_len);
4122 memcpy(&scpnt->sense_buffer,
4123 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4124 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4125 (void *) &scpnt->sense_buffer, sns_len);
4126 }
4127
4128 /* check for overrun */
4129 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4130 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4131 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4132 "The response data length is "
4133 "%d, the original length was %d.\n",
4134 unit->fcp_lun,
4135 unit->port->wwpn,
4136 zfcp_get_busid_by_unit(unit),
4137 fcp_rsp_iu->fcp_resid,
4138 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4139 }
4140
4141 /* check for underrun */
4142 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4143 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4144 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4145 "The response data length is "
4146 "%d, the original length was %d.\n",
4147 unit->fcp_lun,
4148 unit->port->wwpn,
4149 zfcp_get_busid_by_unit(unit),
4150 fcp_rsp_iu->fcp_resid,
4151 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4152
4153 scpnt->resid = fcp_rsp_iu->fcp_resid;
4154 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
6f71d9bc 4155 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4156 }
4157
4158 skip_fsfstatus:
4159 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4160
4161 zfcp_cmd_dbf_event_scsi("response", scpnt);
4162
4163 /* cleanup pointer (need this especially for abort) */
4164 scpnt->host_scribble = NULL;
4165
4166 /*
4167 * NOTE:
4168 * according to the outcome of a discussion on linux-scsi we
4169 * don't need to grab the io_request_lock here since we use
4170 * the new eh
4171 */
4172 /* always call back */
4173
4174 (scpnt->scsi_done) (scpnt);
4175
4176 /*
4177 * We must hold this lock until scsi_done has been called.
4178 * Otherwise we may call scsi_done after abort regarding this
4179 * command has completed.
4180 * Note: scsi_done must not block!
4181 */
4182 out:
4183 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4184 return retval;
4185}
4186
4187/*
4188 * function: zfcp_fsf_send_fcp_command_task_management_handler
4189 *
4190 * purpose: evaluates FCP_RSP IU
4191 *
4192 * returns:
4193 */
4194static int
4195zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4196{
4197 int retval = 0;
4198 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4199 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4200 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
059c97d0 4201 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 4202
4203 del_timer(&fsf_req->adapter->scsi_er_timer);
4204 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4205 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4206 goto skip_fsfstatus;
4207 }
4208
4209 /* check FCP_RSP_INFO */
4210 switch (fcp_rsp_info[3]) {
4211 case RSP_CODE_GOOD:
1da177e4
LT		 4212 /* ok, continue */
4213 ZFCP_LOG_DEBUG("no failure or Task Management "
4214 "Function complete\n");
4215 break;
4216 case RSP_CODE_TASKMAN_UNSUPP:
1da177e4
LT		 4217 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4218 "is not supported on the target device "
4219 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4220 unit->fcp_lun,
4221 unit->port->wwpn,
4222 zfcp_get_busid_by_unit(unit));
4223 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4224 break;
4225 case RSP_CODE_TASKMAN_FAILED:
1da177e4
LT		 4226 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4227 "failed to complete successfully. "
4228 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4229 unit->fcp_lun,
4230 unit->port->wwpn,
4231 zfcp_get_busid_by_unit(unit));
4232 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4233 break;
4234 default:
4235 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4236 "code was detected for a command. "
4237 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4238 "(debug info 0x%x)\n",
4239 unit->fcp_lun,
4240 unit->port->wwpn,
4241 zfcp_get_busid_by_unit(unit),
4242 fcp_rsp_info[3]);
4243 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4244 }
4245
4246 skip_fsfstatus:
4247 return retval;
4248}
4249
4250
4251/*
4252 * function: zfcp_fsf_control_file
4253 *
4254 * purpose: Initiator of the control file upload/download FSF requests
4255 *
4256 * returns: 0 - FSF request is successfuly created and queued
4257 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4258 * -EINVAL - Invalid direction specified
4259 * -ENOMEM - Insufficient memory
4260 * -EPERM - Cannot create FSF request or place it in QDIO queue
4261 */
4262int
4263zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4264 struct zfcp_fsf_req **fsf_req_ptr,
4265 u32 fsf_command,
4266 u32 option,
4267 struct zfcp_sg_list *sg_list)
4268{
4269 struct zfcp_fsf_req *fsf_req;
4270 struct fsf_qtcb_bottom_support *bottom;
4271 volatile struct qdio_buffer_element *sbale;
4272 struct timer_list *timer;
4273 unsigned long lock_flags;
4274 int req_flags = 0;
4275 int direction;
4276 int retval = 0;
4277
4278 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4279 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4280 zfcp_get_busid_by_adapter(adapter));
4281 retval = -EOPNOTSUPP;
4282 goto out;
4283 }
4284
4285 switch (fsf_command) {
4286
4287 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4288 direction = SBAL_FLAGS0_TYPE_WRITE;
4289 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4290 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4291 req_flags = ZFCP_WAIT_FOR_SBAL;
4292 break;
4293
4294 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4295 direction = SBAL_FLAGS0_TYPE_READ;
4296 break;
4297
4298 default:
4299 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4300 retval = -EINVAL;
4301 goto out;
4302 }
4303
4304 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4305 if (!timer) {
4306 retval = -ENOMEM;
4307 goto out;
4308 }
4309
4310 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4311 NULL, &lock_flags, &fsf_req);
4312 if (retval < 0) {
4313 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4314 "adapter %s\n",
4315 zfcp_get_busid_by_adapter(adapter));
4316 retval = -EPERM;
4317 goto unlock_queue_lock;
4318 }
4319
4320 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4321 sbale[0].flags |= direction;
4322
4323 bottom = &fsf_req->qtcb->bottom.support;
4324 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4325 bottom->option = option;
4326
4327 if (sg_list->count > 0) {
4328 int bytes;
4329
4330 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4331 sg_list->sg, sg_list->count,
4332 ZFCP_MAX_SBALS_PER_REQ);
4333 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4334 ZFCP_LOG_INFO(
4335 "error: Could not create sufficient number of "
4336 "SBALS for an FSF request to the adapter %s\n",
4337 zfcp_get_busid_by_adapter(adapter));
4338 retval = -ENOMEM;
4339 goto free_fsf_req;
4340 }
4341 } else
4342 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4343
4344 init_timer(timer);
4345 timer->function = zfcp_fsf_request_timeout_handler;
4346 timer->data = (unsigned long) adapter;
4347 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4348
4349 retval = zfcp_fsf_req_send(fsf_req, timer);
4350 if (retval < 0) {
4351 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4352 "(adapter %s)\n",
4353 zfcp_get_busid_by_adapter(adapter));
4354 retval = -EPERM;
4355 goto free_fsf_req;
4356 }
4357 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4358
4359 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4360 "adapter %s\n",
4361 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4362 "download" : "upload",
4363 zfcp_get_busid_by_adapter(adapter));
4364
4365 wait_event(fsf_req->completion_wq,
4366 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4367
4368 *fsf_req_ptr = fsf_req;
4369 del_timer_sync(timer);
4370 goto free_timer;
4371
4372 free_fsf_req:
4373 zfcp_fsf_req_free(fsf_req);
4374 unlock_queue_lock:
4375 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4376 free_timer:
4377 kfree(timer);
4378 out:
4379 return retval;
4380}
4381
4382
4383/*
4384 * function: zfcp_fsf_control_file_handler
4385 *
4386 * purpose: Handler of the control file upload/download FSF requests
4387 *
4388 * returns: 0 - FSF request successfuly processed
4389 * -EAGAIN - Operation has to be repeated because of a temporary problem
4390 * -EACCES - There is no permission to execute an operation
4391 * -EPERM - The control file is not in a right format
4392 * -EIO - There is a problem with the FCP adapter
4393 * -EINVAL - Invalid operation
4394 * -EFAULT - User space memory I/O operation fault
4395 */
4396static int
4397zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4398{
4399 struct zfcp_adapter *adapter = fsf_req->adapter;
4400 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4401 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4402 int retval = 0;
4403
4404 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4405 retval = -EINVAL;
4406 goto skip_fsfstatus;
4407 }
4408
4409 switch (header->fsf_status) {
4410
4411 case FSF_GOOD:
1da177e4
LT		 4412 ZFCP_LOG_NORMAL(
4413 "The FSF request has been successfully completed "
4414 "on the adapter %s\n",
4415 zfcp_get_busid_by_adapter(adapter));
4416 break;
4417
4418 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
1da177e4
LT		 4419 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4420 switch (header->fsf_status_qual.word[0]) {
4421
6f71d9bc 4422 case FSF_SQ_CFDC_HARDENED_ON_SE:
4423 ZFCP_LOG_NORMAL(
4424 "CFDC on the adapter %s has being "
4425 "hardened on primary and secondary SE\n",
4426 zfcp_get_busid_by_adapter(adapter));
4427 break;
4428
1da177e4
LT		 4429 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4430 ZFCP_LOG_NORMAL(
4431 "CFDC of the adapter %s could not "
4432 "be saved on the SE\n",
4433 zfcp_get_busid_by_adapter(adapter));
4434 break;
4435
4436 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4437 ZFCP_LOG_NORMAL(
4438 "CFDC of the adapter %s could not "
4439 "be copied to the secondary SE\n",
4440 zfcp_get_busid_by_adapter(adapter));
4441 break;
4442
4443 default:
4444 ZFCP_LOG_NORMAL(
4445 "CFDC could not be hardened "
4446 "on the adapter %s\n",
4447 zfcp_get_busid_by_adapter(adapter));
4448 }
4449 }
4450 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4451 retval = -EAGAIN;
4452 break;
4453
4454 case FSF_AUTHORIZATION_FAILURE:
1da177e4
LT		 4455 ZFCP_LOG_NORMAL(
4456 "Adapter %s does not accept privileged commands\n",
4457 zfcp_get_busid_by_adapter(adapter));
4458 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4459 retval = -EACCES;
4460 break;
4461
4462 case FSF_CFDC_ERROR_DETECTED:
1da177e4
LT		 4463 ZFCP_LOG_NORMAL(
4464 "Error at position %d in the CFDC, "
4465 "CFDC is discarded by the adapter %s\n",
4466 header->fsf_status_qual.word[0],
4467 zfcp_get_busid_by_adapter(adapter));
4468 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4469 retval = -EPERM;
4470 break;
4471
4472 case FSF_CONTROL_FILE_UPDATE_ERROR:
1da177e4
LT		 4473 ZFCP_LOG_NORMAL(
4474 "Adapter %s cannot harden the control file, "
4475 "file is discarded\n",
4476 zfcp_get_busid_by_adapter(adapter));
4477 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4478 retval = -EIO;
4479 break;
4480
4481 case FSF_CONTROL_FILE_TOO_LARGE:
1da177e4
LT		 4482 ZFCP_LOG_NORMAL(
4483 "Control file is too large, file is discarded "
4484 "by the adapter %s\n",
4485 zfcp_get_busid_by_adapter(adapter));
4486 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4487 retval = -EIO;
4488 break;
4489
4490 case FSF_ACCESS_CONFLICT_DETECTED:
1da177e4
LT		 4491 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4492 ZFCP_LOG_NORMAL(
4493 "CFDC has been discarded by the adapter %s, "
4494 "because activation would impact "
4495 "%d active connection(s)\n",
4496 zfcp_get_busid_by_adapter(adapter),
4497 header->fsf_status_qual.word[0]);
4498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4499 retval = -EIO;
4500 break;
4501
4502 case FSF_CONFLICTS_OVERRULED:
1da177e4
LT		 4503 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4504 ZFCP_LOG_NORMAL(
4505 "CFDC has been activated on the adapter %s, "
4506 "but activation has impacted "
4507 "%d active connection(s)\n",
4508 zfcp_get_busid_by_adapter(adapter),
4509 header->fsf_status_qual.word[0]);
4510 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4511 retval = -EIO;
4512 break;
4513
4514 case FSF_UNKNOWN_OP_SUBTYPE:
1da177e4
LT		 4515 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4516 "op_subtype=0x%x)\n",
4517 zfcp_get_busid_by_adapter(adapter),
4518 bottom->operation_subtype);
4519 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4520 retval = -EINVAL;
4521 break;
4522
4523 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 4524 ZFCP_LOG_NORMAL(
4525 "Invalid option 0x%x has been specified "
4526 "in QTCB bottom sent to the adapter %s\n",
4527 bottom->option,
4528 zfcp_get_busid_by_adapter(adapter));
4529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4530 retval = -EINVAL;
4531 break;
4532
4533 default:
4534 ZFCP_LOG_NORMAL(
4535 "bug: An unknown/unexpected FSF status 0x%08x "
4536 "was presented on the adapter %s\n",
4537 header->fsf_status,
4538 zfcp_get_busid_by_adapter(adapter));
4539 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4540 debug_exception(fsf_req->adapter->erp_dbf, 0,
4541 &header->fsf_status_qual.word[0], sizeof(u32));
4542 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4543 retval = -EINVAL;
4544 break;
4545 }
4546
4547skip_fsfstatus:
4548 return retval;
4549}
4550
1da177e4
LT		 4551static inline int
4552zfcp_fsf_req_sbal_check(unsigned long *flags,
4553 struct zfcp_qdio_queue *queue, int needed)
4554{
4555 write_lock_irqsave(&queue->queue_lock, *flags);
4556 if (likely(atomic_read(&queue->free_count) >= needed))
4557 return 1;
4558 write_unlock_irqrestore(&queue->queue_lock, *flags);
4559 return 0;
4560}
4561
4562/*
4563 * set qtcb pointer in fsf_req and initialize QTCB
4564 */
4565static inline void
4566zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4567{
4568 if (likely(fsf_req->qtcb != NULL)) {
4569 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4570 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4571 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4572 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4573 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4574 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4575 }
4576}
4577
4578/**
4579 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4580 * @adapter: adapter for which request queue is examined
4581 * @req_flags: flags indicating whether to wait for needed SBAL or not
4582 * @lock_flags: lock_flags if queue_lock is taken
4583 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4584 * Locks: lock adapter->request_queue->queue_lock on success
4585 */
4586static int
4587zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4588 unsigned long *lock_flags)
4589{
4590 long ret;
4591 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4592
4593 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4594 ret = wait_event_interruptible_timeout(adapter->request_wq,
4595 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4596 ZFCP_SBAL_TIMEOUT);
4597 if (ret < 0)
4598 return ret;
4599 if (!ret)
4600 return -EIO;
4601 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4602 return -EIO;
4603
4604 return 0;
4605}
4606
4607/*
4608 * function: zfcp_fsf_req_create
4609 *
4610 * purpose: create an FSF request at the specified adapter and
4611 * setup common fields
4612 *
4613 * returns: -ENOMEM if there was insufficient memory for a request
4614 * -EIO if no qdio buffers could be allocate to the request
4615 * -EINVAL/-EPERM on bug conditions in req_dequeue
4616 * 0 in success
4617 *
4618 * note: The created request is returned by reference.
4619 *
4620 * locks: lock of concerned request queue must not be held,
4621 * but is held on completion (write, irqsave)
4622 */
4623int
4624zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4625 mempool_t *pool, unsigned long *lock_flags,
4626 struct zfcp_fsf_req **fsf_req_p)
4627{
4628 volatile struct qdio_buffer_element *sbale;
4629 struct zfcp_fsf_req *fsf_req = NULL;
4630 int ret = 0;
4631 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4632
4633 /* allocate new FSF request */
4634 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4635 if (unlikely(NULL == fsf_req)) {
4636 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4637 "the outbound (send) queue.\n");
4638 ret = -ENOMEM;
4639 goto failed_fsf_req;
4640 }
4641
4642 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
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
4664 fsf_req->adapter = adapter; /* pointer to "parent" adapter */
4665 fsf_req->fsf_command = fsf_cmd;
4666 fsf_req->sbal_number = 1;
4667 fsf_req->sbal_first = req_queue->free_index;
4668 fsf_req->sbal_curr = req_queue->free_index;
4669 fsf_req->sbale_curr = 1;
4670
4671 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4672 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4673 }
4674
4675 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4676
4677 /* setup common SBALE fields */
4678 sbale[0].addr = fsf_req;
4679 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4680 if (likely(fsf_req->qtcb != NULL)) {
4681 sbale[1].addr = (void *) fsf_req->qtcb;
4682 sbale[1].length = sizeof(struct fsf_qtcb);
4683 }
4684
4685 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4686 fsf_req->sbal_number, fsf_req->sbal_first);
4687
4688 goto success;
4689
4690 failed_sbals:
4691/* dequeue new FSF request previously enqueued */
4692 zfcp_fsf_req_free(fsf_req);
4693 fsf_req = NULL;
4694
4695 failed_fsf_req:
4696 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4697 success:
4698 *fsf_req_p = fsf_req;
4699 return ret;
4700}
4701
4702/*
4703 * function: zfcp_fsf_req_send
4704 *
4705 * purpose: start transfer of FSF request via QDIO
4706 *
4707 * returns: 0 - request transfer succesfully started
4708 * !0 - start of request transfer failed
4709 */
4710static int
4711zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4712{
4713 struct zfcp_adapter *adapter;
4714 struct zfcp_qdio_queue *req_queue;
4715 volatile struct qdio_buffer_element *sbale;
4716 int new_distance_from_int;
4717 unsigned long flags;
4718 int inc_seq_no = 1;
4719 int retval = 0;
4720
4721 adapter = fsf_req->adapter;
4722 req_queue = &adapter->request_queue,
4723
4724
4725 /* FIXME(debug): remove it later */
4726 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4727 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4728 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4729 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4730 sbale[1].length);
4731
4732 /* set sequence counter in QTCB */
4733 if (likely(fsf_req->qtcb)) {
4734 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4735 fsf_req->seq_no = adapter->fsf_req_seq_no;
4736 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4737 "FSF sequence counter value of %i\n",
4738 fsf_req,
4739 zfcp_get_busid_by_adapter(adapter),
4740 fsf_req->qtcb->prefix.req_seq_no);
4741 } else
4742 inc_seq_no = 0;
4743
4744 /* put allocated FSF request at list tail */
1db2c9c0 4745 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
1da177e4 4746 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
1db2c9c0 4747 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4
LT		 4748
4749 /* figure out expiration time of timeout and start timeout */
4750 if (unlikely(timer)) {
4751 timer->expires += jiffies;
4752 add_timer(timer);
4753 }
4754
4755 ZFCP_LOG_TRACE("request queue of adapter %s: "
4756 "next free SBAL is %i, %i free SBALs\n",
4757 zfcp_get_busid_by_adapter(adapter),
4758 req_queue->free_index,
4759 atomic_read(&req_queue->free_count));
4760
4761 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4762 "index_in_queue=%i, count=%i, buffers=%p\n",
4763 zfcp_get_busid_by_adapter(adapter),
4764 QDIO_FLAG_SYNC_OUTPUT,
4765 0, fsf_req->sbal_first, fsf_req->sbal_number,
4766 &req_queue->buffer[fsf_req->sbal_first]);
4767
4768 /*
4769 * adjust the number of free SBALs in request queue as well as
4770 * position of first one
4771 */
4772 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4773 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4774 req_queue->free_index += fsf_req->sbal_number; /* increase */
4775 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4776 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4777
4778 retval = do_QDIO(adapter->ccw_device,
4779 QDIO_FLAG_SYNC_OUTPUT,
4780 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4781
4782 if (unlikely(retval)) {
4783 /* Queues are down..... */
4784 retval = -EIO;
4785 /*
4786 * FIXME(potential race):
4787 * timer might be expired (absolutely unlikely)
4788 */
4789 if (timer)
4790 del_timer(timer);
1db2c9c0 4791 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
1da177e4 4792 list_del(&fsf_req->list);
1db2c9c0 4793 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
1da177e4
LT		 4794 /*
4795 * adjust the number of free SBALs in request queue as well as
4796 * position of first one
4797 */
4798 zfcp_qdio_zero_sbals(req_queue->buffer,
4799 fsf_req->sbal_first, fsf_req->sbal_number);
4800 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
4801 req_queue->free_index -= fsf_req->sbal_number; /* increase */
4802 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4803 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
4804 ZFCP_LOG_DEBUG
4805 ("error: do_QDIO failed. Buffers could not be enqueued "
4806 "to request queue.\n");
4807 } else {
4808 req_queue->distance_from_int = new_distance_from_int;
4809 /*
4810 * increase FSF sequence counter -
4811 * this must only be done for request successfully enqueued to
4812 * QDIO this rejected requests may be cleaned up by calling
4813 * routines resulting in missing sequence counter values
4814 * otherwise,
4815 */
4816 /* Don't increase for unsolicited status */
4817 if (likely(inc_seq_no)) {
4818 adapter->fsf_req_seq_no++;
4819 ZFCP_LOG_TRACE
4820 ("FSF sequence counter value of adapter %s "
4821 "increased to %i\n",
4822 zfcp_get_busid_by_adapter(adapter),
4823 adapter->fsf_req_seq_no);
4824 }
4825 /* count FSF requests pending */
4826 atomic_inc(&adapter->fsf_reqs_active);
4827 }
4828 return retval;
4829}
4830
1da177e4 4831#undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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