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[SCSI] zfcp: Add trace records for recovery thread and its queues
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
4a9d2d8b
AH		 2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
1da177e4 4 *
4a9d2d8b 5 * (C) Copyright IBM Corp. 2002, 2006
1da177e4
LT		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
1da177e4
LT		 22#include "zfcp_ext.h"
23
24static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
25static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
26static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
27static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
28static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
29static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
30static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
31static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
32static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
33static int zfcp_fsf_send_fcp_command_task_management_handler(
34 struct zfcp_fsf_req *);
35static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
36static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
37static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
38static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
39static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
40static inline int zfcp_fsf_req_sbal_check(
41 unsigned long *, struct zfcp_qdio_queue *, int);
42static inline int zfcp_use_one_sbal(
43 struct scatterlist *, int, struct scatterlist *, int);
44static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
2abbe866 45static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
1da177e4
LT		 46static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
47static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
48static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
aef4a983
MS		 49static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *,
50 struct fsf_link_down_info *);
1da177e4 51static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
1da177e4
LT		 52
53/* association between FSF command and FSF QTCB type */
54static u32 fsf_qtcb_type[] = {
55 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
56 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
58 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
59 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
61 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
62 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
63 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
64 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
65 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
66 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
67 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
68};
69
70static const char zfcp_act_subtable_type[5][8] = {
71 "unknown", "OS", "WWPN", "DID", "LUN"
72};
73
74/****************************************************************/
75/*************** FSF related Functions *************************/
76/****************************************************************/
77
78#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
79
80/*
81 * function: zfcp_fsf_req_alloc
82 *
41fa2ada 83 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
1da177e4
LT		 84 * unsolicited requests) via helper functions
85 * Does some initial fsf request set-up.
41fa2ada 86 *
1da177e4
LT		 87 * returns: pointer to allocated fsf_req if successfull
88 * NULL otherwise
89 *
90 * locks: none
91 *
92 */
93static struct zfcp_fsf_req *
94zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
95{
96 size_t size;
97 void *ptr;
98 struct zfcp_fsf_req *fsf_req = NULL;
99
100 if (req_flags & ZFCP_REQ_NO_QTCB)
101 size = sizeof(struct zfcp_fsf_req);
102 else
dd52e0ea 103 size = sizeof(struct zfcp_fsf_req_qtcb);
1da177e4 104
dd52e0ea 105 if (likely(pool))
1da177e4 106 ptr = mempool_alloc(pool, GFP_ATOMIC);
dd52e0ea
HC		 107 else {
108 if (req_flags & ZFCP_REQ_NO_QTCB)
109 ptr = kmalloc(size, GFP_ATOMIC);
110 else
111 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
54e6ecb2 112 GFP_ATOMIC);
dd52e0ea 113 }
1da177e4 114
dd52e0ea 115 if (unlikely(!ptr))
1da177e4
LT		 116 goto out;
117
118 memset(ptr, 0, size);
119
120 if (req_flags & ZFCP_REQ_NO_QTCB) {
121 fsf_req = (struct zfcp_fsf_req *) ptr;
122 } else {
dd52e0ea
HC		 123 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
124 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
1da177e4
LT		 125 }
126
127 fsf_req->pool = pool;
128
129 out:
130 return fsf_req;
131}
132
133/*
134 * function: zfcp_fsf_req_free
135 *
136 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
137 * returns it into the pool via helper functions.
138 *
139 * returns: sod all
140 *
141 * locks: none
142 */
1db2c9c0 143void
1da177e4
LT		 144zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
145{
dd52e0ea 146 if (likely(fsf_req->pool)) {
1da177e4 147 mempool_free(fsf_req, fsf_req->pool);
dd52e0ea
HC		 148 return;
149 }
150
151 if (fsf_req->qtcb) {
152 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
153 return;
154 }
155
156 kfree(fsf_req);
1da177e4
LT		 157}
158
869b2b44
MP		 159/*
160 * Never ever call this without shutting down the adapter first.
161 * Otherwise the adapter would continue using and corrupting s390 storage.
162 * Included BUG_ON() call to ensure this is done.
163 * ERP is supposed to be the only user of this function.
1da177e4 164 */
6fcc4711 165void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 166{
869b2b44 167 struct zfcp_fsf_req *fsf_req, *tmp;
fea9d6c7 168 unsigned long flags;
6fcc4711 169 LIST_HEAD(remove_queue);
869b2b44 170 unsigned int i;
fea9d6c7 171
869b2b44 172 BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
fea9d6c7
VS		 173 spin_lock_irqsave(&adapter->req_list_lock, flags);
174 atomic_set(&adapter->reqs_active, 0);
869b2b44 175 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 176 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 177 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
178
869b2b44
MP		 179 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
180 list_del(&fsf_req->list);
181 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
182 zfcp_fsf_req_complete(fsf_req);
6fcc4711 183 }
1da177e4
LT		 184}
185
186/*
187 * function: zfcp_fsf_req_complete
188 *
189 * purpose: Updates active counts and timers for openfcp-reqs
190 * May cleanup request after req_eval returns
191 *
192 * returns: 0 - success
193 * !0 - failure
194 *
41fa2ada 195 * context:
1da177e4
LT		 196 */
197int
198zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
199{
200 int retval = 0;
201 int cleanup;
1da177e4
LT		 202
203 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
204 ZFCP_LOG_DEBUG("Status read response received\n");
205 /*
206 * Note: all cleanup handling is done in the callchain of
207 * the function call-chain below.
208 */
209 zfcp_fsf_status_read_handler(fsf_req);
210 goto out;
2abbe866
AH		 211 } else {
212 del_timer(&fsf_req->timer);
1da177e4 213 zfcp_fsf_protstatus_eval(fsf_req);
2abbe866 214 }
1da177e4
LT		 215
216 /*
41fa2ada
SS		 217 * fsf_req may be deleted due to waking up functions, so
218 * cleanup is saved here and used later
1da177e4
LT		 219 */
220 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
221 cleanup = 1;
222 else
223 cleanup = 0;
224
225 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
226
227 /* cleanup request if requested by initiator */
228 if (likely(cleanup)) {
229 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
230 /*
231 * lock must not be held here since it will be
232 * grabed by the called routine, too
233 */
1db2c9c0 234 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 235 } else {
236 /* notify initiator waiting for the requests completion */
237 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
238 /*
239 * FIXME: Race! We must not access fsf_req here as it might have been
240 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
241 * flag. It's an improbable case. But, we have the same paranoia for
242 * the cleanup flag already.
243 * Might better be handled using complete()?
244 * (setting the flag and doing wakeup ought to be atomic
245 * with regard to checking the flag as long as waitqueue is
246 * part of the to be released structure)
247 */
248 wake_up(&fsf_req->completion_wq);
249 }
250
251 out:
252 return retval;
253}
254
255/*
256 * function: zfcp_fsf_protstatus_eval
257 *
258 * purpose: evaluates the QTCB of the finished FSF request
259 * and initiates appropriate actions
260 * (usually calling FSF command specific handlers)
261 *
41fa2ada 262 * returns:
1da177e4 263 *
41fa2ada 264 * context:
1da177e4
LT		 265 *
266 * locks:
267 */
268static int
269zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
270{
271 int retval = 0;
272 struct zfcp_adapter *adapter = fsf_req->adapter;
8a36e453
MS		 273 struct fsf_qtcb *qtcb = fsf_req->qtcb;
274 union fsf_prot_status_qual *prot_status_qual =
275 &qtcb->prefix.prot_status_qual;
1da177e4 276
8a36e453 277 zfcp_hba_dbf_event_fsf_response(fsf_req);
1da177e4
LT		 278
279 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
280 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
281 (unsigned long) fsf_req);
282 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
283 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
1da177e4
LT		 284 goto skip_protstatus;
285 }
286
1da177e4 287 /* evaluate FSF Protocol Status */
8a36e453 288 switch (qtcb->prefix.prot_status) {
1da177e4
LT		 289
290 case FSF_PROT_GOOD:
1da177e4 291 case FSF_PROT_FSF_STATUS_PRESENTED:
1da177e4
LT		 292 break;
293
294 case FSF_PROT_QTCB_VERSION_ERROR:
1da177e4
LT		 295 ZFCP_LOG_NORMAL("error: The adapter %s contains "
296 "microcode of version 0x%x, the device driver "
297 "only supports 0x%x. Aborting.\n",
298 zfcp_get_busid_by_adapter(adapter),
8a36e453
MS		 299 prot_status_qual->version_error.fsf_version,
300 ZFCP_QTCB_VERSION);
1da177e4 301 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 302 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
303 break;
304
305 case FSF_PROT_SEQ_NUMB_ERROR:
1da177e4
LT		 306 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
307 "driver (0x%x) and adapter %s (0x%x). "
308 "Restarting all operations on this adapter.\n",
8a36e453 309 qtcb->prefix.req_seq_no,
1da177e4 310 zfcp_get_busid_by_adapter(adapter),
8a36e453 311 prot_status_qual->sequence_error.exp_req_seq_no);
1da177e4 312 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 313 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
314 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
315 break;
316
317 case FSF_PROT_UNSUPP_QTCB_TYPE:
1da177e4
LT		 318 ZFCP_LOG_NORMAL("error: Packet header type used by the "
319 "device driver is incompatible with "
320 "that used on adapter %s. "
321 "Stopping all operations on this adapter.\n",
322 zfcp_get_busid_by_adapter(adapter));
1da177e4 323 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 324 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
325 break;
326
327 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
1da177e4
LT		 328 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
329 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
330 &(adapter->status));
1da177e4
LT		 331 break;
332
333 case FSF_PROT_DUPLICATE_REQUEST_ID:
1da177e4
LT		 334 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
335 "to the adapter %s is ambiguous. "
aef4a983
MS		 336 "Stopping all operations on this adapter.\n",
337 *(unsigned long long*)
338 (&qtcb->bottom.support.req_handle),
1da177e4 339 zfcp_get_busid_by_adapter(adapter));
1da177e4 340 zfcp_erp_adapter_shutdown(adapter, 0);
1da177e4
LT		 341 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
342 break;
343
344 case FSF_PROT_LINK_DOWN:
aef4a983
MS		 345 zfcp_fsf_link_down_info_eval(adapter,
346 &prot_status_qual->link_down_info);
2f8f3ed5 347 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 348 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
349 break;
350
351 case FSF_PROT_REEST_QUEUE:
8a36e453 352 ZFCP_LOG_NORMAL("The local link to adapter with "
1da177e4
LT		 353 "%s was re-plugged. "
354 "Re-starting operations on this adapter.\n",
355 zfcp_get_busid_by_adapter(adapter));
356 /* All ports should be marked as ready to run again */
357 zfcp_erp_modify_adapter_status(adapter,
358 ZFCP_STATUS_COMMON_RUNNING,
359 ZFCP_SET);
360 zfcp_erp_adapter_reopen(adapter,
361 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
362 | ZFCP_STATUS_COMMON_ERP_FAILED);
1da177e4
LT		 363 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
364 break;
365
366 case FSF_PROT_ERROR_STATE:
1da177e4
LT		 367 ZFCP_LOG_NORMAL("error: The adapter %s "
368 "has entered the error state. "
369 "Restarting all operations on this "
370 "adapter.\n",
371 zfcp_get_busid_by_adapter(adapter));
1da177e4 372 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 373 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
374 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 break;
376
377 default:
378 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
379 "provided by the adapter %s "
380 "is not compatible with the device driver. "
381 "Stopping all operations on this adapter. "
382 "(debug info 0x%x).\n",
383 zfcp_get_busid_by_adapter(adapter),
8a36e453 384 qtcb->prefix.prot_status);
1da177e4
LT		 385 zfcp_erp_adapter_shutdown(adapter, 0);
386 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
387 }
388
389 skip_protstatus:
390 /*
391 * always call specific handlers to give them a chance to do
392 * something meaningful even in error cases
393 */
394 zfcp_fsf_fsfstatus_eval(fsf_req);
395 return retval;
396}
397
398/*
399 * function: zfcp_fsf_fsfstatus_eval
400 *
401 * purpose: evaluates FSF status of completed FSF request
402 * and acts accordingly
403 *
404 * returns:
405 */
406static int
407zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
408{
409 int retval = 0;
410
411 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
412 goto skip_fsfstatus;
413 }
414
415 /* evaluate FSF Status */
416 switch (fsf_req->qtcb->header.fsf_status) {
417 case FSF_UNKNOWN_COMMAND:
1da177e4
LT		 418 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
419 "not known by the adapter %s "
420 "Stopping all operations on this adapter. "
421 "(debug info 0x%x).\n",
422 zfcp_get_busid_by_adapter(fsf_req->adapter),
423 fsf_req->qtcb->header.fsf_command);
1da177e4 424 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
1da177e4
LT		 425 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
426 break;
427
428 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 429 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
430 "SCSI stack.\n");
1da177e4
LT		 431 break;
432
433 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 434 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
435 break;
1da177e4
LT		 436 }
437
438 skip_fsfstatus:
439 /*
440 * always call specific handlers to give them a chance to do
441 * something meaningful even in error cases
442 */
443 zfcp_fsf_req_dispatch(fsf_req);
444
445 return retval;
446}
447
448/*
449 * function: zfcp_fsf_fsfstatus_qual_eval
450 *
451 * purpose: evaluates FSF status-qualifier of completed FSF request
452 * and acts accordingly
453 *
454 * returns:
455 */
456static int
457zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
458{
459 int retval = 0;
460
461 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
462 case FSF_SQ_FCP_RSP_AVAILABLE:
1da177e4
LT		 463 break;
464 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4 465 /* The SCSI-stack may now issue retries or escalate */
1da177e4
LT		 466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
467 break;
468 case FSF_SQ_COMMAND_ABORTED:
1da177e4 469 /* Carry the aborted state on to upper layer */
1da177e4
LT		 470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
471 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
472 break;
473 case FSF_SQ_NO_RECOM:
ceb3dfba 474 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a "
1da177e4
LT		 475 "problem on the adapter %s "
476 "Stopping all operations on this adapter. ",
477 zfcp_get_busid_by_adapter(fsf_req->adapter));
478 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
1da177e4
LT		 479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
480 break;
481 case FSF_SQ_ULP_PROGRAMMING_ERROR:
1da177e4
LT		 482 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
483 "(adapter %s)\n",
484 zfcp_get_busid_by_adapter(fsf_req->adapter));
1da177e4
LT		 485 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
486 break;
487 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
488 case FSF_SQ_NO_RETRY_POSSIBLE:
489 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
490 /* dealt with in the respective functions */
491 break;
492 default:
493 ZFCP_LOG_NORMAL("bug: Additional status info could "
494 "not be interpreted properly.\n");
495 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
496 (char *) &fsf_req->qtcb->header.fsf_status_qual,
497 sizeof (union fsf_status_qual));
1da177e4
LT		 498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
499 break;
500 }
501
502 return retval;
503}
504
aef4a983
MS		 505/**
506 * zfcp_fsf_link_down_info_eval - evaluate link down information block
507 */
508static void
509zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter,
510 struct fsf_link_down_info *link_down)
511{
ee69ab7a
MS		 512 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
513 &adapter->status))
514 return;
515
516 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
517
2f8f3ed5
AH		 518 if (link_down == NULL)
519 goto out;
ee69ab7a 520
aef4a983
MS		 521 switch (link_down->error_code) {
522 case FSF_PSQ_LINK_NO_LIGHT:
523 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
524 "(no light detected)\n",
525 zfcp_get_busid_by_adapter(adapter));
526 break;
527 case FSF_PSQ_LINK_WRAP_PLUG:
528 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
529 "(wrap plug detected)\n",
530 zfcp_get_busid_by_adapter(adapter));
531 break;
532 case FSF_PSQ_LINK_NO_FCP:
533 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
534 "(adjacent node on link does not support FCP)\n",
535 zfcp_get_busid_by_adapter(adapter));
536 break;
537 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
538 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
539 "(firmware update in progress)\n",
540 zfcp_get_busid_by_adapter(adapter));
541 break;
542 case FSF_PSQ_LINK_INVALID_WWPN:
543 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
544 "(duplicate or invalid WWPN detected)\n",
545 zfcp_get_busid_by_adapter(adapter));
546 break;
547 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
548 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
549 "(no support for NPIV by Fabric)\n",
550 zfcp_get_busid_by_adapter(adapter));
551 break;
552 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
553 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
554 "(out of resource in FCP daughtercard)\n",
555 zfcp_get_busid_by_adapter(adapter));
556 break;
557 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
558 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
559 "(out of resource in Fabric)\n",
560 zfcp_get_busid_by_adapter(adapter));
561 break;
562 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
563 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
564 "(unable to Fabric login)\n",
565 zfcp_get_busid_by_adapter(adapter));
566 break;
567 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
568 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
569 zfcp_get_busid_by_adapter(adapter));
570 break;
571 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
572 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
573 zfcp_get_busid_by_adapter(adapter));
574 break;
575 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
576 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
577 zfcp_get_busid_by_adapter(adapter));
578 break;
579 default:
580 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
581 "(warning: unknown reason code %d)\n",
582 zfcp_get_busid_by_adapter(adapter),
583 link_down->error_code);
584 }
585
586 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
587 ZFCP_LOG_DEBUG("Debug information to link down: "
588 "primary_status=0x%02x "
589 "ioerr_code=0x%02x "
590 "action_code=0x%02x "
591 "reason_code=0x%02x "
592 "explanation_code=0x%02x "
593 "vendor_specific_code=0x%02x\n",
594 link_down->primary_status,
595 link_down->ioerr_code,
596 link_down->action_code,
597 link_down->reason_code,
598 link_down->explanation_code,
599 link_down->vendor_specific_code);
600
2f8f3ed5
AH		 601 out:
602 zfcp_erp_adapter_failed(adapter);
aef4a983
MS		 603}
604
1da177e4
LT		 605/*
606 * function: zfcp_fsf_req_dispatch
607 *
608 * purpose: calls the appropriate command specific handler
609 *
41fa2ada 610 * returns:
1da177e4
LT		 611 */
612static int
613zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
614{
615 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
616 struct zfcp_adapter *adapter = fsf_req->adapter;
617 int retval = 0;
618
1da177e4
LT		 619
620 switch (fsf_req->fsf_command) {
621
622 case FSF_QTCB_FCP_CMND:
1da177e4
LT		 623 zfcp_fsf_send_fcp_command_handler(fsf_req);
624 break;
625
626 case FSF_QTCB_ABORT_FCP_CMND:
1da177e4
LT		 627 zfcp_fsf_abort_fcp_command_handler(fsf_req);
628 break;
629
630 case FSF_QTCB_SEND_GENERIC:
1da177e4
LT		 631 zfcp_fsf_send_ct_handler(fsf_req);
632 break;
633
634 case FSF_QTCB_OPEN_PORT_WITH_DID:
1da177e4
LT		 635 zfcp_fsf_open_port_handler(fsf_req);
636 break;
637
638 case FSF_QTCB_OPEN_LUN:
1da177e4
LT		 639 zfcp_fsf_open_unit_handler(fsf_req);
640 break;
641
642 case FSF_QTCB_CLOSE_LUN:
1da177e4
LT		 643 zfcp_fsf_close_unit_handler(fsf_req);
644 break;
645
646 case FSF_QTCB_CLOSE_PORT:
1da177e4
LT		 647 zfcp_fsf_close_port_handler(fsf_req);
648 break;
649
650 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
1da177e4
LT		 651 zfcp_fsf_close_physical_port_handler(fsf_req);
652 break;
653
654 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
1da177e4
LT		 655 zfcp_fsf_exchange_config_data_handler(fsf_req);
656 break;
657
658 case FSF_QTCB_EXCHANGE_PORT_DATA:
1da177e4
LT		 659 zfcp_fsf_exchange_port_data_handler(fsf_req);
660 break;
661
662 case FSF_QTCB_SEND_ELS:
1da177e4
LT		 663 zfcp_fsf_send_els_handler(fsf_req);
664 break;
665
666 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
1da177e4
LT		 667 zfcp_fsf_control_file_handler(fsf_req);
668 break;
669
670 case FSF_QTCB_UPLOAD_CONTROL_FILE:
1da177e4
LT		 671 zfcp_fsf_control_file_handler(fsf_req);
672 break;
673
674 default:
1da177e4
LT		 675 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
676 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
677 "not supported by the adapter %s\n",
8a36e453 678 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 679 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
680 ZFCP_LOG_NORMAL
681 ("bug: Command issued by the device driver differs "
682 "from the command returned by the adapter %s "
683 "(debug info 0x%x, 0x%x).\n",
8a36e453 684 zfcp_get_busid_by_adapter(adapter),
1da177e4
LT		 685 fsf_req->fsf_command,
686 fsf_req->qtcb->header.fsf_command);
687 }
688
689 if (!erp_action)
690 return retval;
691
1da177e4
LT		 692 zfcp_erp_async_handler(erp_action, 0);
693
694 return retval;
695}
696
697/*
698 * function: zfcp_fsf_status_read
699 *
700 * purpose: initiates a Status Read command at the specified adapter
701 *
702 * returns:
703 */
704int
705zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
706{
707 struct zfcp_fsf_req *fsf_req;
708 struct fsf_status_read_buffer *status_buffer;
709 unsigned long lock_flags;
710 volatile struct qdio_buffer_element *sbale;
711 int retval = 0;
712
713 /* setup new FSF request */
714 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
715 req_flags | ZFCP_REQ_NO_QTCB,
716 adapter->pool.fsf_req_status_read,
717 &lock_flags, &fsf_req);
718 if (retval < 0) {
719 ZFCP_LOG_INFO("error: Could not create unsolicited status "
720 "buffer for adapter %s.\n",
721 zfcp_get_busid_by_adapter(adapter));
722 goto failed_req_create;
723 }
724
725 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
726 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
727 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
728 fsf_req->sbale_curr = 2;
729
730 status_buffer =
731 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
732 if (!status_buffer) {
733 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
734 goto failed_buf;
735 }
736 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
059c97d0 737 fsf_req->data = (unsigned long) status_buffer;
1da177e4
LT		 738
739 /* insert pointer to respective buffer */
740 sbale = zfcp_qdio_sbale_curr(fsf_req);
741 sbale->addr = (void *) status_buffer;
742 sbale->length = sizeof(struct fsf_status_read_buffer);
743
2abbe866 744 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 745 if (retval) {
746 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
747 "environment.\n");
748 goto failed_req_send;
749 }
750
751 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
752 zfcp_get_busid_by_adapter(adapter));
753 goto out;
754
755 failed_req_send:
756 mempool_free(status_buffer, adapter->pool.data_status_read);
757
758 failed_buf:
759 zfcp_fsf_req_free(fsf_req);
760 failed_req_create:
8a36e453 761 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
1da177e4
LT		 762 out:
763 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
764 return retval;
765}
766
767static int
768zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
769{
770 struct fsf_status_read_buffer *status_buffer;
771 struct zfcp_adapter *adapter;
772 struct zfcp_port *port;
773 unsigned long flags;
774
059c97d0 775 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 776 adapter = fsf_req->adapter;
777
778 read_lock_irqsave(&zfcp_data.config_lock, flags);
779 list_for_each_entry(port, &adapter->port_list_head, list)
780 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
781 break;
782 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
783
784 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
ceb3dfba 785 ZFCP_LOG_NORMAL("bug: Reopen port indication received for "
1d589edf 786 "nonexisting port with d_id 0x%06x on "
1da177e4
LT		 787 "adapter %s. Ignored.\n",
788 status_buffer->d_id & ZFCP_DID_MASK,
789 zfcp_get_busid_by_adapter(adapter));
790 goto out;
791 }
792
793 switch (status_buffer->status_subtype) {
794
795 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
1da177e4
LT		 796 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
797 zfcp_erp_port_reopen(port, 0);
798 break;
799
800 case FSF_STATUS_READ_SUB_ERROR_PORT:
1da177e4
LT		 801 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
802 zfcp_erp_port_shutdown(port, 0);
803 break;
804
805 default:
806 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
807 debug_exception(adapter->erp_dbf, 0,
808 &status_buffer->status_subtype, sizeof (u32));
809 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
810 "for a reopen indication on port with "
1d589edf 811 "d_id 0x%06x on the adapter %s. "
1da177e4
LT		 812 "Ignored. (debug info 0x%x)\n",
813 status_buffer->d_id,
814 zfcp_get_busid_by_adapter(adapter),
815 status_buffer->status_subtype);
816 }
817 out:
818 return 0;
819}
820
821/*
822 * function: zfcp_fsf_status_read_handler
823 *
824 * purpose: is called for finished Open Port command
825 *
41fa2ada 826 * returns:
1da177e4
LT		 827 */
828static int
829zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
830{
831 int retval = 0;
832 struct zfcp_adapter *adapter = fsf_req->adapter;
833 struct fsf_status_read_buffer *status_buffer =
059c97d0 834 (struct fsf_status_read_buffer *) fsf_req->data;
b7a52fa7 835 struct fsf_bit_error_payload *fsf_bit_error;
1da177e4
LT		 836
837 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
8a36e453 838 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
1da177e4 839 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 840 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 841 goto out;
842 }
843
8a36e453
MS		 844 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
845
1da177e4
LT		 846 switch (status_buffer->status_type) {
847
848 case FSF_STATUS_READ_PORT_CLOSED:
1da177e4
LT		 849 zfcp_fsf_status_read_port_closed(fsf_req);
850 break;
851
852 case FSF_STATUS_READ_INCOMING_ELS:
1da177e4
LT		 853 zfcp_fsf_incoming_els(fsf_req);
854 break;
855
856 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4
LT		 857 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
858 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 859 break;
860
861 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
b7a52fa7
RW		 862 fsf_bit_error = (struct fsf_bit_error_payload *)
863 status_buffer->payload;
864 ZFCP_LOG_NORMAL("Warning: bit error threshold data "
865 "received (adapter %s, "
866 "link failures = %i, loss of sync errors = %i, "
867 "loss of signal errors = %i, "
868 "primitive sequence errors = %i, "
869 "invalid transmission word errors = %i, "
870 "CRC errors = %i)\n",
871 zfcp_get_busid_by_adapter(adapter),
872 fsf_bit_error->link_failure_error_count,
873 fsf_bit_error->loss_of_sync_error_count,
874 fsf_bit_error->loss_of_signal_error_count,
875 fsf_bit_error->primitive_sequence_error_count,
876 fsf_bit_error->invalid_transmission_word_error_count,
877 fsf_bit_error->crc_error_count);
878 ZFCP_LOG_INFO("Additional bit error threshold data "
879 "(adapter %s, "
880 "primitive sequence event time-outs = %i, "
881 "elastic buffer overrun errors = %i, "
882 "advertised receive buffer-to-buffer credit = %i, "
883 "current receice buffer-to-buffer credit = %i, "
884 "advertised transmit buffer-to-buffer credit = %i, "
885 "current transmit buffer-to-buffer credit = %i)\n",
886 zfcp_get_busid_by_adapter(adapter),
887 fsf_bit_error->primitive_sequence_event_timeout_count,
888 fsf_bit_error->elastic_buffer_overrun_error_count,
889 fsf_bit_error->advertised_receive_b2b_credit,
890 fsf_bit_error->current_receive_b2b_credit,
891 fsf_bit_error->advertised_transmit_b2b_credit,
892 fsf_bit_error->current_transmit_b2b_credit);
1da177e4
LT		 893 break;
894
895 case FSF_STATUS_READ_LINK_DOWN:
aef4a983
MS		 896 switch (status_buffer->status_subtype) {
897 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
898 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
899 zfcp_get_busid_by_adapter(adapter));
ee69ab7a
MS		 900 zfcp_fsf_link_down_info_eval(adapter,
901 (struct fsf_link_down_info *)
902 &status_buffer->payload);
aef4a983
MS		 903 break;
904 case FSF_STATUS_READ_SUB_FDISC_FAILED:
905 ZFCP_LOG_INFO("Local link to adapter %s is down "
906 "due to failed FDISC login\n",
ee69ab7a
MS		 907 zfcp_get_busid_by_adapter(adapter));
908 zfcp_fsf_link_down_info_eval(adapter,
909 (struct fsf_link_down_info *)
910 &status_buffer->payload);
aef4a983
MS		 911 break;
912 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
913 ZFCP_LOG_INFO("Local link to adapter %s is down "
914 "due to firmware update on adapter\n",
915 zfcp_get_busid_by_adapter(adapter));
ee69ab7a 916 zfcp_fsf_link_down_info_eval(adapter, NULL);
aef4a983
MS		 917 break;
918 default:
919 ZFCP_LOG_INFO("Local link to adapter %s is down "
920 "due to unknown reason\n",
921 zfcp_get_busid_by_adapter(adapter));
ee69ab7a 922 zfcp_fsf_link_down_info_eval(adapter, NULL);
aef4a983 923 };
1da177e4
LT		 924 break;
925
926 case FSF_STATUS_READ_LINK_UP:
aef4a983 927 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
ee69ab7a
MS		 928 "Restarting operations on this adapter\n",
929 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 930 /* All ports should be marked as ready to run again */
931 zfcp_erp_modify_adapter_status(adapter,
932 ZFCP_STATUS_COMMON_RUNNING,
933 ZFCP_SET);
934 zfcp_erp_adapter_reopen(adapter,
935 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
936 | ZFCP_STATUS_COMMON_ERP_FAILED);
937 break;
938
9eb69aff
MS		 939 case FSF_STATUS_READ_NOTIFICATION_LOST:
940 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
941 "adapter %s%s%s%s%s%s%s%s%s\n",
942 zfcp_get_busid_by_adapter(adapter),
943 (status_buffer->status_subtype &
944 FSF_STATUS_READ_SUB_INCOMING_ELS) ?
945 ", incoming ELS" : "",
946 (status_buffer->status_subtype &
947 FSF_STATUS_READ_SUB_SENSE_DATA) ?
948 ", sense data" : "",
949 (status_buffer->status_subtype &
950 FSF_STATUS_READ_SUB_LINK_STATUS) ?
951 ", link status change" : "",
952 (status_buffer->status_subtype &
953 FSF_STATUS_READ_SUB_PORT_CLOSED) ?
954 ", port close" : "",
955 (status_buffer->status_subtype &
956 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
957 ", bit error exception" : "",
958 (status_buffer->status_subtype &
959 FSF_STATUS_READ_SUB_ACT_UPDATED) ?
960 ", ACT update" : "",
961 (status_buffer->status_subtype &
962 FSF_STATUS_READ_SUB_ACT_HARDENED) ?
963 ", ACT hardening" : "",
964 (status_buffer->status_subtype &
965 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
966 ", adapter feature change" : "");
967
968 if (status_buffer->status_subtype &
969 FSF_STATUS_READ_SUB_ACT_UPDATED)
970 zfcp_erp_adapter_access_changed(adapter);
971 break;
972
1da177e4 973 case FSF_STATUS_READ_CFDC_UPDATED:
8a36e453 974 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
1da177e4
LT		 975 zfcp_get_busid_by_adapter(adapter));
976 zfcp_erp_adapter_access_changed(adapter);
977 break;
978
979 case FSF_STATUS_READ_CFDC_HARDENED:
1da177e4
LT		 980 switch (status_buffer->status_subtype) {
981 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
8a36e453 982 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
1da177e4
LT		 983 zfcp_get_busid_by_adapter(adapter));
984 break;
985 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
8a36e453 986 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
1da177e4
LT		 987 "to the secondary SE\n",
988 zfcp_get_busid_by_adapter(adapter));
989 break;
990 default:
8a36e453 991 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
1da177e4
LT		 992 zfcp_get_busid_by_adapter(adapter));
993 }
994 break;
995
aef4a983
MS		 996 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
997 debug_text_event(adapter->erp_dbf, 2, "unsol_features:");
998 ZFCP_LOG_INFO("List of supported features on adapter %s has "
999 "been changed from 0x%08X to 0x%08X\n",
1000 zfcp_get_busid_by_adapter(adapter),
1001 *(u32*) (status_buffer->payload + 4),
1002 *(u32*) (status_buffer->payload));
1003 adapter->adapter_features = *(u32*) status_buffer->payload;
1004 break;
1005
1da177e4 1006 default:
8a36e453 1007 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1da177e4
LT		 1008 "type was received (debug info 0x%x)\n",
1009 status_buffer->status_type);
1010 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1011 status_buffer);
1012 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1013 (char *) status_buffer,
1014 sizeof (struct fsf_status_read_buffer));
1015 break;
1016 }
1017 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 1018 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 1019 /*
1020 * recycle buffer and start new request repeat until outbound
1021 * queue is empty or adapter shutdown is requested
1022 */
1023 /*
1024 * FIXME(qdio):
1025 * we may wait in the req_create for 5s during shutdown, so
1026 * qdio_cleanup will have to wait at least that long before returning
1027 * with failure to allow us a proper cleanup under all circumstances
1028 */
1029 /*
1030 * FIXME:
1031 * allocation failure possible? (Is this code needed?)
1032 */
1033 retval = zfcp_fsf_status_read(adapter, 0);
1034 if (retval < 0) {
1035 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1036 "request for the adapter %s.\n",
1037 zfcp_get_busid_by_adapter(adapter));
1038 /* temporary fix to avoid status read buffer shortage */
1039 adapter->status_read_failed++;
1040 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1041 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1042 ZFCP_LOG_INFO("restart adapter %s due to status read "
1043 "buffer shortage\n",
1044 zfcp_get_busid_by_adapter(adapter));
1045 zfcp_erp_adapter_reopen(adapter, 0);
1046 }
1047 }
1048 out:
1049 return retval;
1050}
1051
1052/*
1053 * function: zfcp_fsf_abort_fcp_command
1054 *
1055 * purpose: tells FSF to abort a running SCSI command
1056 *
1057 * returns: address of initiated FSF request
1058 * NULL - request could not be initiated
1059 *
41fa2ada 1060 * FIXME(design): should be watched by a timeout !!!
1da177e4
LT		 1061 * FIXME(design) shouldn't this be modified to return an int
1062 * also...don't know how though
1063 */
1064struct zfcp_fsf_req *
1065zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1066 struct zfcp_adapter *adapter,
1067 struct zfcp_unit *unit, int req_flags)
1068{
1069 volatile struct qdio_buffer_element *sbale;
1da177e4 1070 struct zfcp_fsf_req *fsf_req = NULL;
2abbe866 1071 unsigned long lock_flags;
1da177e4
LT		 1072 int retval = 0;
1073
1074 /* setup new FSF request */
1075 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1076 req_flags, adapter->pool.fsf_req_abort,
1077 &lock_flags, &fsf_req);
1078 if (retval < 0) {
1079 ZFCP_LOG_INFO("error: Failed to create an abort command "
1080 "request for lun 0x%016Lx on port 0x%016Lx "
1081 "on adapter %s.\n",
1082 unit->fcp_lun,
1083 unit->port->wwpn,
1084 zfcp_get_busid_by_adapter(adapter));
1085 goto out;
1086 }
1087
951f746f
CS		 1088 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1089 &unit->status)))
1090 goto unit_blocked;
1091
1da177e4
LT		 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
2abbe866
AH		 1105 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
1106 retval = zfcp_fsf_req_send(fsf_req);
951f746f
CS		 1107 if (!retval)
1108 goto out;
1109
1110 unit_blocked:
1da177e4
LT		 1111 zfcp_fsf_req_free(fsf_req);
1112 fsf_req = NULL;
1da177e4 1113
1da177e4
LT		 1114 out:
1115 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1116 return fsf_req;
1117}
1118
1119/*
1120 * function: zfcp_fsf_abort_fcp_command_handler
1121 *
1122 * purpose: is called for finished Abort FCP Command request
1123 *
41fa2ada 1124 * returns:
1da177e4
LT		 1125 */
1126static int
1127zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1128{
1129 int retval = -EINVAL;
059c97d0 1130 struct zfcp_unit *unit;
8627533c
CS		 1131 union fsf_status_qual *fsf_stat_qual =
1132 &new_fsf_req->qtcb->header.fsf_status_qual;
1da177e4 1133
1da177e4
LT		 1134 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1135 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1136 goto skip_fsfstatus;
1137 }
1138
059c97d0
AH		 1139 unit = (struct zfcp_unit *) new_fsf_req->data;
1140
1da177e4
LT		 1141 /* evaluate FSF status in QTCB */
1142 switch (new_fsf_req->qtcb->header.fsf_status) {
1143
1144 case FSF_PORT_HANDLE_NOT_VALID:
8627533c 1145 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1146 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1147 "fsf_s_phand_nv0");
1148 /*
1149 * In this case a command that was sent prior to a port
1150 * reopen was aborted (handles are different). This is
1151 * fine.
1152 */
1153 } else {
1da177e4
LT		 1154 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1155 "port 0x%016Lx on adapter %s invalid. "
1156 "This may happen occasionally.\n",
1157 unit->port->handle,
1158 unit->port->wwpn,
1159 zfcp_get_busid_by_unit(unit));
1160 ZFCP_LOG_INFO("status qualifier:\n");
1161 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1162 (char *) &new_fsf_req->qtcb->header.
1163 fsf_status_qual,
1164 sizeof (union fsf_status_qual));
1165 /* Let's hope this sorts out the mess */
1166 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1167 "fsf_s_phand_nv1");
1168 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1169 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1170 }
1171 break;
1172
1173 case FSF_LUN_HANDLE_NOT_VALID:
8627533c 1174 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1175 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1176 "fsf_s_lhand_nv0");
1177 /*
1178 * In this case a command that was sent prior to a unit
1179 * reopen was aborted (handles are different).
1180 * This is fine.
1181 */
1182 } else {
1da177e4
LT		 1183 ZFCP_LOG_INFO
1184 ("Warning: Temporary LUN identifier 0x%x of LUN "
1185 "0x%016Lx on port 0x%016Lx on adapter %s is "
1186 "invalid. This may happen in rare cases. "
1187 "Trying to re-establish link.\n",
1188 unit->handle,
1189 unit->fcp_lun,
1190 unit->port->wwpn,
1191 zfcp_get_busid_by_unit(unit));
1192 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1193 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1194 (char *) &new_fsf_req->qtcb->header.
1195 fsf_status_qual,
1196 sizeof (union fsf_status_qual));
1197 /* Let's hope this sorts out the mess */
1198 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1199 "fsf_s_lhand_nv1");
1200 zfcp_erp_port_reopen(unit->port, 0);
1201 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1202 }
1203 break;
1204
1205 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1da177e4
LT		 1206 retval = 0;
1207 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1208 "fsf_s_no_exist");
1209 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1210 break;
1211
1212 case FSF_PORT_BOXED:
1da177e4
LT		 1213 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1214 "be reopened\n", unit->port->wwpn,
1215 zfcp_get_busid_by_unit(unit));
1216 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1217 "fsf_s_pboxed");
d736a27b 1218 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 1219 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1220 | ZFCP_STATUS_FSFREQ_RETRY;
1221 break;
1222
1223 case FSF_LUN_BOXED:
1da177e4
LT		 1224 ZFCP_LOG_INFO(
1225 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1226 "to be reopened\n",
1227 unit->fcp_lun, unit->port->wwpn,
1228 zfcp_get_busid_by_unit(unit));
1229 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 1230 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 1231 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1232 | ZFCP_STATUS_FSFREQ_RETRY;
1233 break;
1234
1235 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1236 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1237 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1238 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1239 "fsf_sq_ltest");
65a8d4e1 1240 zfcp_test_link(unit->port);
1da177e4
LT		 1241 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1242 break;
1243 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1244 /* SCSI stack will escalate */
1245 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1246 "fsf_sq_ulp");
1247 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1248 break;
1249 default:
1250 ZFCP_LOG_NORMAL
1251 ("bug: Wrong status qualifier 0x%x arrived.\n",
1252 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1253 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1254 "fsf_sq_inval:");
1255 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1256 &new_fsf_req->qtcb->header.
1257 fsf_status_qual.word[0], sizeof (u32));
1258 break;
1259 }
1260 break;
1261
1262 case FSF_GOOD:
1da177e4
LT		 1263 retval = 0;
1264 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1265 break;
1266
1267 default:
1268 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1269 "(debug info 0x%x)\n",
1270 new_fsf_req->qtcb->header.fsf_status);
1271 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1272 "fsf_s_inval:");
1273 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1274 &new_fsf_req->qtcb->header.fsf_status,
1275 sizeof (u32));
1276 break;
1277 }
1278 skip_fsfstatus:
1279 return retval;
1280}
1281
1282/**
1283 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1284 * one SBALE
1285 * Two scatter-gather lists are passed, one for the reqeust and one for the
1286 * response.
1287 */
1288static inline int
1289zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1290 struct scatterlist *resp, int resp_count)
1291{
1292 return ((req_count == 1) &&
1293 (resp_count == 1) &&
1294 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1295 PAGE_MASK) ==
1296 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1297 req[0].length - 1) & PAGE_MASK)) &&
1298 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1299 PAGE_MASK) ==
1300 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1301 resp[0].length - 1) & PAGE_MASK)));
1302}
1303
1304/**
1305 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1306 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1307 * the request
1308 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1309 * a struct zfcp_fsf_req
1310 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1311 * is sent within error recovery
1312 */
1313int
1314zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1315 struct zfcp_erp_action *erp_action)
1316{
1317 volatile struct qdio_buffer_element *sbale;
1318 struct zfcp_port *port;
1319 struct zfcp_adapter *adapter;
1320 struct zfcp_fsf_req *fsf_req;
1321 unsigned long lock_flags;
1322 int bytes;
1323 int ret = 0;
1324
1325 port = ct->port;
1326 adapter = port->adapter;
1327
1328 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1329 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1330 pool, &lock_flags, &fsf_req);
1331 if (ret < 0) {
1332 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1333 "adapter: %s\n",
1334 zfcp_get_busid_by_adapter(adapter));
1335 goto failed_req;
1336 }
1337
1da177e4
LT		 1338 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1339 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1340 ct->resp, ct->resp_count)){
1341 /* both request buffer and response buffer
1342 fit into one sbale each */
1343 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1344 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1345 sbale[2].length = ct->req[0].length;
1346 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1347 sbale[3].length = ct->resp[0].length;
1348 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1349 } else if (adapter->adapter_features &
1da177e4
LT		 1350 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1351 /* try to use chained SBALs */
1352 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1353 SBAL_FLAGS0_TYPE_WRITE_READ,
1354 ct->req, ct->req_count,
1355 ZFCP_MAX_SBALS_PER_CT_REQ);
1356 if (bytes <= 0) {
1357 ZFCP_LOG_INFO("error: creation of CT request failed "
1358 "on adapter %s\n",
1359 zfcp_get_busid_by_adapter(adapter));
1360 if (bytes == 0)
1361 ret = -ENOMEM;
1362 else
1363 ret = bytes;
1364
1365 goto failed_send;
1366 }
1367 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1368 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1369 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1370 SBAL_FLAGS0_TYPE_WRITE_READ,
1371 ct->resp, ct->resp_count,
1372 ZFCP_MAX_SBALS_PER_CT_REQ);
1373 if (bytes <= 0) {
1374 ZFCP_LOG_INFO("error: creation of CT request failed "
1375 "on adapter %s\n",
1376 zfcp_get_busid_by_adapter(adapter));
1377 if (bytes == 0)
1378 ret = -ENOMEM;
1379 else
1380 ret = bytes;
1381
1382 goto failed_send;
1383 }
1384 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1385 } else {
1386 /* reject send generic request */
1387 ZFCP_LOG_INFO(
1388 "error: microcode does not support chained SBALs,"
1389 "CT request too big (adapter %s)\n",
1390 zfcp_get_busid_by_adapter(adapter));
1391 ret = -EOPNOTSUPP;
1392 goto failed_send;
1393 }
1394
1395 /* settings in QTCB */
1396 fsf_req->qtcb->header.port_handle = port->handle;
06506d00
AH		 1397 fsf_req->qtcb->bottom.support.service_class =
1398 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1399 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
059c97d0 1400 fsf_req->data = (unsigned long) ct;
1da177e4 1401
8a36e453
MS		 1402 zfcp_san_dbf_event_ct_request(fsf_req);
1403
2abbe866
AH		 1404 if (erp_action) {
1405 erp_action->fsf_req = fsf_req;
1406 fsf_req->erp_action = erp_action;
1407 zfcp_erp_start_timer(fsf_req);
1408 } else
1409 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1410
1411 ret = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 1412 if (ret) {
1413 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1414 "(adapter %s, port 0x%016Lx)\n",
1415 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1416 goto failed_send;
1417 }
1418
1419 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1420 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1421 goto out;
1422
1423 failed_send:
1424 zfcp_fsf_req_free(fsf_req);
1425 if (erp_action != NULL) {
1426 erp_action->fsf_req = NULL;
1427 }
1428 failed_req:
1429 out:
1430 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1431 lock_flags);
1432 return ret;
1433}
1434
1435/**
1436 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1437 * @fsf_req: pointer to struct zfcp_fsf_req
1438 *
059c97d0
AH		 1439 * Data specific for the Generic Service request is passed using
1440 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1441 * Usually a specific handler for the CT request is called which is
1442 * found in this structure.
1da177e4
LT		 1443 */
1444static int
1445zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1446{
1447 struct zfcp_port *port;
1448 struct zfcp_adapter *adapter;
1449 struct zfcp_send_ct *send_ct;
1450 struct fsf_qtcb_header *header;
1451 struct fsf_qtcb_bottom_support *bottom;
1452 int retval = -EINVAL;
1453 u16 subtable, rule, counter;
1454
1455 adapter = fsf_req->adapter;
059c97d0 1456 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1da177e4
LT		 1457 port = send_ct->port;
1458 header = &fsf_req->qtcb->header;
1459 bottom = &fsf_req->qtcb->bottom.support;
1460
1461 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1462 goto skip_fsfstatus;
1463
1464 /* evaluate FSF status in QTCB */
1465 switch (header->fsf_status) {
1466
1467 case FSF_GOOD:
8a36e453 1468 zfcp_san_dbf_event_ct_response(fsf_req);
1da177e4
LT		 1469 retval = 0;
1470 break;
1471
1472 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 1473 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1474 "class %d.\n",
1475 zfcp_get_busid_by_port(port),
1476 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4
LT		 1477 /* stop operation for this adapter */
1478 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1479 zfcp_erp_adapter_shutdown(adapter, 0);
1480 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1481 break;
1482
1483 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1484 switch (header->fsf_status_qual.word[0]){
1485 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1486 /* reopening link to port */
1487 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1488 zfcp_test_link(port);
1489 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1490 break;
1491 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1492 /* ERP strategy will escalate */
1493 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1494 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1495 break;
1496 default:
1497 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1498 "arrived.\n",
1499 header->fsf_status_qual.word[0]);
1500 break;
1501 }
1502 break;
1503
1504 case FSF_ACCESS_DENIED:
1da177e4 1505 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1d589edf 1506 "command (adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1507 zfcp_get_busid_by_port(port), port->d_id);
1508 for (counter = 0; counter < 2; counter++) {
1509 subtable = header->fsf_status_qual.halfword[counter * 2];
1510 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1511 switch (subtable) {
1512 case FSF_SQ_CFDC_SUBTABLE_OS:
1513 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1514 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1515 case FSF_SQ_CFDC_SUBTABLE_LUN:
1516 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1517 zfcp_act_subtable_type[subtable], rule);
1518 break;
1519 }
1520 }
1521 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1522 zfcp_erp_port_access_denied(port);
1523 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1524 break;
1525
1526 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 1527 ZFCP_LOG_INFO("generic service command rejected "
1d589edf 1528 "(adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1529 zfcp_get_busid_by_port(port), port->d_id);
1530 ZFCP_LOG_INFO("status qualifier:\n");
1531 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1532 (char *) &header->fsf_status_qual,
1533 sizeof (union fsf_status_qual));
1534 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1535 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1536 break;
1537
1538 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 1539 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1540 "0x%016Lx on adapter %s invalid. This may "
1541 "happen occasionally.\n", port->handle,
1542 port->wwpn, zfcp_get_busid_by_port(port));
1543 ZFCP_LOG_INFO("status qualifier:\n");
1544 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1545 (char *) &header->fsf_status_qual,
1546 sizeof (union fsf_status_qual));
1547 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1548 zfcp_erp_adapter_reopen(adapter, 0);
1549 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1550 break;
1551
1552 case FSF_PORT_BOXED:
1da177e4 1553 ZFCP_LOG_INFO("port needs to be reopened "
1d589edf 1554 "(adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1555 zfcp_get_busid_by_port(port), port->d_id);
1556 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 1557 zfcp_erp_port_boxed(port);
1da177e4
LT		 1558 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1559 | ZFCP_STATUS_FSFREQ_RETRY;
1560 break;
1561
1562 /* following states should never occure, all cases avoided
1563 in zfcp_fsf_send_ct - but who knows ... */
1564 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1565 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1566 "req_buf_length=%d, resp_buf_length=%d)\n",
1567 zfcp_get_busid_by_adapter(adapter),
1568 bottom->req_buf_length, bottom->resp_buf_length);
1569 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1570 break;
1571 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1572 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1573 "req_buf_length=%d)\n",
1574 zfcp_get_busid_by_adapter(adapter),
1575 bottom->req_buf_length);
1576 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1577 break;
1578 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1579 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1580 "resp_buf_length=%d)\n",
1581 zfcp_get_busid_by_adapter(adapter),
1582 bottom->resp_buf_length);
1583 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1584 break;
1585 case FSF_SBAL_MISMATCH:
1da177e4
LT		 1586 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1587 "resp_buf_length=%d)\n",
1588 zfcp_get_busid_by_adapter(adapter),
1589 bottom->req_buf_length, bottom->resp_buf_length);
1590 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1591 break;
1592
1593 default:
1594 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1595 "(debug info 0x%x)\n", header->fsf_status);
1596 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1597 debug_exception(adapter->erp_dbf, 0,
1598 &header->fsf_status_qual.word[0], sizeof (u32));
1599 break;
1600 }
1601
1602skip_fsfstatus:
1603 send_ct->status = retval;
1604
1605 if (send_ct->handler != NULL)
1606 send_ct->handler(send_ct->handler_data);
1607
1608 return retval;
1609}
1610
1611/**
1612 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1613 * @els: pointer to struct zfcp_send_els which contains all needed data for
1614 * the command.
1615 */
1616int
1617zfcp_fsf_send_els(struct zfcp_send_els *els)
1618{
1619 volatile struct qdio_buffer_element *sbale;
1620 struct zfcp_fsf_req *fsf_req;
13e1e1f0 1621 u32 d_id;
1da177e4
LT		 1622 struct zfcp_adapter *adapter;
1623 unsigned long lock_flags;
1624 int bytes;
1625 int ret = 0;
1626
1627 d_id = els->d_id;
1628 adapter = els->adapter;
1629
1630 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1631 ZFCP_REQ_AUTO_CLEANUP,
1632 NULL, &lock_flags, &fsf_req);
1633 if (ret < 0) {
1634 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1635 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1636 zfcp_get_busid_by_adapter(adapter), d_id);
1637 goto failed_req;
1638 }
1639
3f0ca62a
CS		 1640 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1641 &els->port->status))) {
1642 ret = -EBUSY;
1643 goto port_blocked;
1644 }
1645
1da177e4
LT		 1646 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1647 if (zfcp_use_one_sbal(els->req, els->req_count,
1648 els->resp, els->resp_count)){
1649 /* both request buffer and response buffer
1650 fit into one sbale each */
1651 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1652 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1653 sbale[2].length = els->req[0].length;
1654 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1655 sbale[3].length = els->resp[0].length;
1656 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1657 } else if (adapter->adapter_features &
1da177e4
LT		 1658 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1659 /* try to use chained SBALs */
1660 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1661 SBAL_FLAGS0_TYPE_WRITE_READ,
1662 els->req, els->req_count,
1663 ZFCP_MAX_SBALS_PER_ELS_REQ);
1664 if (bytes <= 0) {
1665 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1666 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1667 zfcp_get_busid_by_adapter(adapter), d_id);
1668 if (bytes == 0) {
1669 ret = -ENOMEM;
1670 } else {
1671 ret = bytes;
1672 }
1673 goto failed_send;
1674 }
1675 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1676 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1677 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1678 SBAL_FLAGS0_TYPE_WRITE_READ,
1679 els->resp, els->resp_count,
1680 ZFCP_MAX_SBALS_PER_ELS_REQ);
1681 if (bytes <= 0) {
1682 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1683 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1684 zfcp_get_busid_by_adapter(adapter), d_id);
1685 if (bytes == 0) {
1686 ret = -ENOMEM;
1687 } else {
1688 ret = bytes;
1689 }
1690 goto failed_send;
1691 }
1692 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1693 } else {
1694 /* reject request */
1695 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1696 ", ELS request too big (adapter %s, "
1d589edf 1697 "port d_id: 0x%06x)\n",
1da177e4
LT		 1698 zfcp_get_busid_by_adapter(adapter), d_id);
1699 ret = -EOPNOTSUPP;
1700 goto failed_send;
1701 }
1702
1703 /* settings in QTCB */
1704 fsf_req->qtcb->bottom.support.d_id = d_id;
06506d00
AH		 1705 fsf_req->qtcb->bottom.support.service_class =
1706 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1707 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
059c97d0 1708 fsf_req->data = (unsigned long) els;
1da177e4
LT		 1709
1710 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1711
8a36e453
MS		 1712 zfcp_san_dbf_event_els_request(fsf_req);
1713
2abbe866
AH		 1714 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1715 ret = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 1716 if (ret) {
1717 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1d589edf 1718 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1719 zfcp_get_busid_by_adapter(adapter), d_id);
1720 goto failed_send;
1721 }
1722
1723 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1d589edf 1724 "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1da177e4
LT		 1725 goto out;
1726
3f0ca62a 1727 port_blocked:
1da177e4
LT		 1728 failed_send:
1729 zfcp_fsf_req_free(fsf_req);
1730
1731 failed_req:
1732 out:
1733 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1734 lock_flags);
1735
1736 return ret;
1737}
1738
1739/**
1740 * zfcp_fsf_send_els_handler - handler for ELS commands
1741 * @fsf_req: pointer to struct zfcp_fsf_req
1742 *
059c97d0
AH		 1743 * Data specific for the ELS command is passed using
1744 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1745 * Usually a specific handler for the ELS command is called which is
1746 * found in this structure.
1da177e4
LT		 1747 */
1748static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1749{
1750 struct zfcp_adapter *adapter;
1da177e4 1751 struct zfcp_port *port;
13e1e1f0 1752 u32 d_id;
1da177e4
LT		 1753 struct fsf_qtcb_header *header;
1754 struct fsf_qtcb_bottom_support *bottom;
1755 struct zfcp_send_els *send_els;
1756 int retval = -EINVAL;
1757 u16 subtable, rule, counter;
1758
059c97d0 1759 send_els = (struct zfcp_send_els *) fsf_req->data;
1da177e4 1760 adapter = send_els->adapter;
64b29a13 1761 port = send_els->port;
1da177e4
LT		 1762 d_id = send_els->d_id;
1763 header = &fsf_req->qtcb->header;
1764 bottom = &fsf_req->qtcb->bottom.support;
1765
1766 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1767 goto skip_fsfstatus;
1768
1769 switch (header->fsf_status) {
1770
1771 case FSF_GOOD:
8a36e453 1772 zfcp_san_dbf_event_els_response(fsf_req);
1da177e4
LT		 1773 retval = 0;
1774 break;
1775
1776 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 1777 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1778 "class %d.\n",
1779 zfcp_get_busid_by_adapter(adapter),
1780 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4
LT		 1781 /* stop operation for this adapter */
1782 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1783 zfcp_erp_adapter_shutdown(adapter, 0);
1784 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1785 break;
1786
1787 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1788 switch (header->fsf_status_qual.word[0]){
1789 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1790 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
64b29a13
AH		 1791 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1792 zfcp_test_link(port);
1da177e4
LT		 1793 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1794 break;
1795 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 1796 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1797 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1798 retval =
1799 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1800 (struct zfcp_ls_rjt_par *)
1801 &header->fsf_status_qual.word[2]);
1802 break;
1803 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 1804 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1805 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1806 break;
1807 default:
1808 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1809 header->fsf_status_qual.word[0]);
1810 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1811 (char*)header->fsf_status_qual.word, 16);
1812 }
1813 break;
1814
1815 case FSF_ELS_COMMAND_REJECTED:
1da177e4
LT		 1816 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1817 "prohibited sending "
1d589edf 1818 "(adapter: %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1819 zfcp_get_busid_by_adapter(adapter), d_id);
1820
1821 break;
1822
1823 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1824 ZFCP_LOG_INFO(
1825 "ELS request size and ELS response size must be either "
1826 "both 0, or both greater than 0 "
1827 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1828 zfcp_get_busid_by_adapter(adapter),
1829 bottom->req_buf_length,
1830 bottom->resp_buf_length);
1831 break;
1832
1833 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1834 ZFCP_LOG_INFO(
1835 "Length of the ELS request buffer, "
1836 "specified in QTCB bottom, "
1837 "exceeds the size of the buffers "
1838 "that have been allocated for ELS request data "
1839 "(adapter: %s, req_buf_length=%d)\n",
1840 zfcp_get_busid_by_adapter(adapter),
1841 bottom->req_buf_length);
1842 break;
1843
1844 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1845 ZFCP_LOG_INFO(
1846 "Length of the ELS response buffer, "
1847 "specified in QTCB bottom, "
1848 "exceeds the size of the buffers "
1849 "that have been allocated for ELS response data "
1850 "(adapter: %s, resp_buf_length=%d)\n",
1851 zfcp_get_busid_by_adapter(adapter),
1852 bottom->resp_buf_length);
1853 break;
1854
1855 case FSF_SBAL_MISMATCH:
1856 /* should never occure, avoided in zfcp_fsf_send_els */
1da177e4
LT		 1857 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1858 "resp_buf_length=%d)\n",
1859 zfcp_get_busid_by_adapter(adapter),
1860 bottom->req_buf_length, bottom->resp_buf_length);
1861 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1862 break;
1863
1864 case FSF_ACCESS_DENIED:
1da177e4 1865 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1d589edf 1866 "(adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1867 zfcp_get_busid_by_adapter(adapter), d_id);
1868 for (counter = 0; counter < 2; counter++) {
1869 subtable = header->fsf_status_qual.halfword[counter * 2];
1870 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1871 switch (subtable) {
1872 case FSF_SQ_CFDC_SUBTABLE_OS:
1873 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1874 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1875 case FSF_SQ_CFDC_SUBTABLE_LUN:
1876 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1877 zfcp_act_subtable_type[subtable], rule);
1878 break;
1879 }
1880 }
1881 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1da177e4
LT		 1882 if (port != NULL)
1883 zfcp_erp_port_access_denied(port);
1da177e4
LT		 1884 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1885 break;
1886
1887 default:
1888 ZFCP_LOG_NORMAL(
1889 "bug: An unknown FSF Status was presented "
1890 "(adapter: %s, fsf_status=0x%08x)\n",
1891 zfcp_get_busid_by_adapter(adapter),
1892 header->fsf_status);
1893 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
1894 debug_exception(adapter->erp_dbf, 0,
1895 &header->fsf_status_qual.word[0], sizeof(u32));
1896 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1897 break;
1898 }
1899
1900skip_fsfstatus:
1901 send_els->status = retval;
1902
aa551daf 1903 if (send_els->handler)
1da177e4
LT		 1904 send_els->handler(send_els->handler_data);
1905
1906 return retval;
1907}
1908
1da177e4
LT		 1909int
1910zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1911{
1912 volatile struct qdio_buffer_element *sbale;
2abbe866 1913 struct zfcp_fsf_req *fsf_req;
52ef11a7 1914 struct zfcp_adapter *adapter = erp_action->adapter;
1da177e4 1915 unsigned long lock_flags;
52ef11a7 1916 int retval;
1da177e4
LT		 1917
1918 /* setup new FSF request */
52ef11a7 1919 retval = zfcp_fsf_req_create(adapter,
1da177e4
LT		 1920 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1921 ZFCP_REQ_AUTO_CLEANUP,
52ef11a7 1922 adapter->pool.fsf_req_erp,
2abbe866 1923 &lock_flags, &fsf_req);
52ef11a7 1924 if (retval) {
1da177e4
LT		 1925 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1926 "data request for adapter %s.\n",
52ef11a7
SS		 1927 zfcp_get_busid_by_adapter(adapter));
1928 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1929 lock_flags);
1930 return retval;
1da177e4
LT		 1931 }
1932
2abbe866 1933 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
52ef11a7
SS		 1934 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1935 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1936
2abbe866 1937 fsf_req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1938 FSF_FEATURE_CFDC |
1939 FSF_FEATURE_LUN_SHARING |
9eb69aff 1940 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1941 FSF_FEATURE_UPDATE_ALERT;
2abbe866
AH		 1942 fsf_req->erp_action = erp_action;
1943 erp_action->fsf_req = fsf_req;
1da177e4 1944
2abbe866
AH		 1945 zfcp_erp_start_timer(fsf_req);
1946 retval = zfcp_fsf_req_send(fsf_req);
52ef11a7
SS		 1947 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1948 lock_flags);
1da177e4 1949 if (retval) {
52ef11a7
SS		 1950 ZFCP_LOG_INFO("error: Could not send exchange configuration "
1951 "data command on the adapter %s\n",
1952 zfcp_get_busid_by_adapter(adapter));
2abbe866 1953 zfcp_fsf_req_free(fsf_req);
1da177e4 1954 erp_action->fsf_req = NULL;
1da177e4 1955 }
52ef11a7
SS		 1956 else
1957 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1958 "(adapter %s)\n",
1959 zfcp_get_busid_by_adapter(adapter));
1da177e4 1960
52ef11a7
SS		 1961 return retval;
1962}
1da177e4 1963
52ef11a7
SS		 1964int
1965zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1966 struct fsf_qtcb_bottom_config *data)
1967{
1968 volatile struct qdio_buffer_element *sbale;
1969 struct zfcp_fsf_req *fsf_req;
1970 unsigned long lock_flags;
1971 int retval;
1972
1973 /* setup new FSF request */
1974 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1975 0, NULL, &lock_flags, &fsf_req);
1976 if (retval) {
1977 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1978 "data request for adapter %s.\n",
1979 zfcp_get_busid_by_adapter(adapter));
1980 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1981 lock_flags);
1982 return retval;
1983 }
1984
1985 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1986 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1987 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1988
1989 fsf_req->qtcb->bottom.config.feature_selection =
1990 FSF_FEATURE_CFDC |
1991 FSF_FEATURE_LUN_SHARING |
1992 FSF_FEATURE_NOTIFICATION_LOST |
1993 FSF_FEATURE_UPDATE_ALERT;
1994
1995 if (data)
1996 fsf_req->data = (unsigned long) data;
1997
1998 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1999 retval = zfcp_fsf_req_send(fsf_req);
2000 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1da177e4 2001 lock_flags);
52ef11a7
SS		 2002 if (retval)
2003 ZFCP_LOG_INFO("error: Could not send exchange configuration "
2004 "data command on the adapter %s\n",
2005 zfcp_get_busid_by_adapter(adapter));
2006 else
2007 wait_event(fsf_req->completion_wq,
2008 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2009
2010 zfcp_fsf_req_free(fsf_req);
2011
1da177e4
LT		 2012 return retval;
2013}
2014
2015/**
2016 * zfcp_fsf_exchange_config_evaluate
2017 * @fsf_req: fsf_req which belongs to xchg config data request
2018 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2019 *
2020 * returns: -EIO on error, 0 otherwise
2021 */
2022static int
2023zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2024{
2025 struct fsf_qtcb_bottom_config *bottom;
2026 struct zfcp_adapter *adapter = fsf_req->adapter;
13e1e1f0 2027 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4
LT		 2028
2029 bottom = &fsf_req->qtcb->bottom.config;
2030 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2031 bottom->low_qtcb_version, bottom->high_qtcb_version);
2032 adapter->fsf_lic_version = bottom->lic_version;
aef4a983
MS		 2033 adapter->adapter_features = bottom->adapter_features;
2034 adapter->connection_features = bottom->connection_features;
6f71d9bc 2035 adapter->peer_wwpn = 0;
2036 adapter->peer_wwnn = 0;
2037 adapter->peer_d_id = 0;
1da177e4
LT		 2038
2039 if (xchg_ok) {
52ef11a7
SS		 2040
2041 if (fsf_req->data)
2042 memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
2043 bottom, sizeof (struct fsf_qtcb_bottom_config));
2044
13e1e1f0
AH		 2045 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
2046 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
2047 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
2048 fc_host_speed(shost) = bottom->fc_link_speed;
52ef11a7
SS		 2049 fc_host_supported_classes(shost) =
2050 FC_COS_CLASS2 | FC_COS_CLASS3;
1da177e4 2051 adapter->hydra_version = bottom->adapter_type;
ad757cdf
AH		 2052 if (fc_host_permanent_port_name(shost) == -1)
2053 fc_host_permanent_port_name(shost) =
2054 fc_host_port_name(shost);
2055 if (bottom->fc_topology == FSF_TOPO_P2P) {
2056 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2057 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2058 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2059 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
2060 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
2061 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
2062 else if (bottom->fc_topology == FSF_TOPO_AL)
2063 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
2064 else
2065 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4 2066 } else {
13e1e1f0
AH		 2067 fc_host_node_name(shost) = 0;
2068 fc_host_port_name(shost) = 0;
2069 fc_host_port_id(shost) = 0;
2070 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
ad757cdf 2071 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4
LT		 2072 adapter->hydra_version = 0;
2073 }
2074
aef4a983 2075 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
1da177e4 2076 adapter->hardware_version = bottom->hardware_version;
13e1e1f0
AH		 2077 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2078 min(FC_SERIAL_NUMBER_SIZE, 17));
2079 EBCASC(fc_host_serial_number(shost),
2080 min(FC_SERIAL_NUMBER_SIZE, 17));
1da177e4
LT		 2081 }
2082
52ef11a7
SS		 2083 ZFCP_LOG_NORMAL("The adapter %s reported the following "
2084 "characteristics:\n"
13e1e1f0
AH		 2085 "WWNN 0x%016Lx, "
2086 "WWPN 0x%016Lx, "
1d589edf 2087 "S_ID 0x%06x,\n"
13e1e1f0
AH		 2088 "adapter version 0x%x, "
2089 "LIC version 0x%x, "
2090 "FC link speed %d Gb/s\n",
2091 zfcp_get_busid_by_adapter(adapter),
2092 (wwn_t) fc_host_node_name(shost),
2093 (wwn_t) fc_host_port_name(shost),
2094 fc_host_port_id(shost),
2095 adapter->hydra_version,
2096 adapter->fsf_lic_version,
2097 fc_host_speed(shost));
1da177e4
LT		 2098 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2099 ZFCP_LOG_NORMAL("error: the adapter %s "
2100 "only supports newer control block "
2101 "versions in comparison to this device "
2102 "driver (try updated device driver)\n",
2103 zfcp_get_busid_by_adapter(adapter));
2104 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2105 zfcp_erp_adapter_shutdown(adapter, 0);
2106 return -EIO;
2107 }
2108 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2109 ZFCP_LOG_NORMAL("error: the adapter %s "
2110 "only supports older control block "
2111 "versions than this device driver uses"
2112 "(consider a microcode upgrade)\n",
2113 zfcp_get_busid_by_adapter(adapter));
2114 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2115 zfcp_erp_adapter_shutdown(adapter, 0);
2116 return -EIO;
2117 }
2118 return 0;
2119}
2120
52ef11a7 2121/**
1da177e4
LT		 2122 * function: zfcp_fsf_exchange_config_data_handler
2123 *
2124 * purpose: is called for finished Exchange Configuration Data command
2125 *
2126 * returns:
2127 */
2128static int
2129zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2130{
2131 struct fsf_qtcb_bottom_config *bottom;
2132 struct zfcp_adapter *adapter = fsf_req->adapter;
aef4a983 2133 struct fsf_qtcb *qtcb = fsf_req->qtcb;
1da177e4
LT		 2134
2135 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2136 return -EIO;
2137
aef4a983 2138 switch (qtcb->header.fsf_status) {
1da177e4
LT		 2139
2140 case FSF_GOOD:
1da177e4
LT		 2141 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2142 return -EIO;
2143
ad757cdf
AH		 2144 switch (fc_host_port_type(adapter->scsi_host)) {
2145 case FC_PORTTYPE_PTP:
6f71d9bc 2146 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2147 "configuration detected at adapter %s\n"
2148 "Peer WWNN 0x%016llx, "
2149 "peer WWPN 0x%016llx, "
2150 "peer d_id 0x%06x\n",
2151 zfcp_get_busid_by_adapter(adapter),
2152 adapter->peer_wwnn,
2153 adapter->peer_wwpn,
2154 adapter->peer_d_id);
1da177e4 2155 debug_text_event(fsf_req->adapter->erp_dbf, 0,
52ef11a7 2156 "top-p-to-p");
6f71d9bc 2157 break;
ad757cdf 2158 case FC_PORTTYPE_NLPORT:
1da177e4
LT		 2159 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2160 "topology detected at adapter %s "
2161 "unsupported, shutting down adapter\n",
2162 zfcp_get_busid_by_adapter(adapter));
2163 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2164 "top-al");
2165 zfcp_erp_adapter_shutdown(adapter, 0);
2166 return -EIO;
ad757cdf 2167 case FC_PORTTYPE_NPORT:
aef4a983 2168 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
52ef11a7
SS		 2169 "network detected at adapter %s.\n",
2170 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 2171 break;
2172 default:
2173 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2174 "reported by the exchange "
2175 "configuration command for "
2176 "the adapter %s is not "
2177 "of a type known to the zfcp "
2178 "driver, shutting down adapter\n",
2179 zfcp_get_busid_by_adapter(adapter));
2180 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2181 "unknown-topo");
2182 zfcp_erp_adapter_shutdown(adapter, 0);
2183 return -EIO;
2184 }
aef4a983 2185 bottom = &qtcb->bottom.config;
1da177e4
LT		 2186 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2187 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2188 "allowed by the adapter %s "
2189 "is lower than the minimum "
2190 "required by the driver (%ld bytes).\n",
2191 bottom->max_qtcb_size,
2192 zfcp_get_busid_by_adapter(adapter),
2193 sizeof(struct fsf_qtcb));
2194 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2195 "qtcb-size");
2196 debug_event(fsf_req->adapter->erp_dbf, 0,
2197 &bottom->max_qtcb_size, sizeof (u32));
2198 zfcp_erp_adapter_shutdown(adapter, 0);
2199 return -EIO;
2200 }
2201 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2202 &adapter->status);
2203 break;
2204 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2205 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2206
2207 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2208 return -EIO;
2209
52ef11a7
SS		 2210 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2211 &adapter->status);
aef4a983
MS		 2212
2213 zfcp_fsf_link_down_info_eval(adapter,
2214 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4
LT		 2215 break;
2216 default:
2217 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2218 debug_event(fsf_req->adapter->erp_dbf, 0,
52ef11a7 2219 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
1da177e4
LT		 2220 zfcp_erp_adapter_shutdown(adapter, 0);
2221 return -EIO;
2222 }
2223 return 0;
2224}
2225
2226/**
2227 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 2228 * @erp_action: ERP action for the adapter for which port data is requested
1da177e4
LT		 2229 */
2230int
52ef11a7 2231zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4
LT		 2232{
2233 volatile struct qdio_buffer_element *sbale;
52ef11a7
SS		 2234 struct zfcp_fsf_req *fsf_req;
2235 struct zfcp_adapter *adapter = erp_action->adapter;
2abbe866 2236 unsigned long lock_flags;
52ef11a7 2237 int retval;
1da177e4 2238
aef4a983 2239 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
1da177e4 2240 ZFCP_LOG_INFO("error: exchange port data "
52ef11a7 2241 "command not supported by adapter %s\n",
1da177e4 2242 zfcp_get_busid_by_adapter(adapter));
52ef11a7
SS		 2243 return -EOPNOTSUPP;
2244 }
1da177e4 2245
1da177e4
LT		 2246 /* setup new FSF request */
2247 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
52ef11a7
SS		 2248 ZFCP_REQ_AUTO_CLEANUP,
2249 adapter->pool.fsf_req_erp,
2250 &lock_flags, &fsf_req);
2251 if (retval) {
1da177e4 2252 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
ceb3dfba 2253 "exchange port data request for "
52ef11a7 2254 "the adapter %s.\n",
1da177e4
LT		 2255 zfcp_get_busid_by_adapter(adapter));
2256 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2257 lock_flags);
2448c459 2258 return retval;
aef4a983
MS		 2259 }
2260
1da177e4 2261 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
52ef11a7
SS		 2262 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2263 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2264
52ef11a7
SS		 2265 erp_action->fsf_req = fsf_req;
2266 fsf_req->erp_action = erp_action;
2267 zfcp_erp_start_timer(fsf_req);
1da177e4 2268
2abbe866 2269 retval = zfcp_fsf_req_send(fsf_req);
52ef11a7
SS		 2270 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2271
1da177e4
LT		 2272 if (retval) {
2273 ZFCP_LOG_INFO("error: Could not send an exchange port data "
52ef11a7 2274 "command on the adapter %s\n",
1da177e4
LT		 2275 zfcp_get_busid_by_adapter(adapter));
2276 zfcp_fsf_req_free(fsf_req);
52ef11a7
SS		 2277 erp_action->fsf_req = NULL;
2278 }
2279 else
2280 ZFCP_LOG_DEBUG("exchange port data request initiated "
2281 "(adapter %s)\n",
2282 zfcp_get_busid_by_adapter(adapter));
2283 return retval;
2284}
2285
2286
2287/**
2288 * zfcp_fsf_exchange_port_data_sync - request information about local port
2289 * and wait until information is ready
2290 */
2291int
2292zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
2293 struct fsf_qtcb_bottom_port *data)
2294{
2295 volatile struct qdio_buffer_element *sbale;
2296 struct zfcp_fsf_req *fsf_req;
2297 unsigned long lock_flags;
2298 int retval;
2299
2300 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2301 ZFCP_LOG_INFO("error: exchange port data "
2302 "command not supported by adapter %s\n",
2303 zfcp_get_busid_by_adapter(adapter));
2304 return -EOPNOTSUPP;
2305 }
2306
2307 /* setup new FSF request */
2308 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2309 0, NULL, &lock_flags, &fsf_req);
2310 if (retval) {
2311 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
ceb3dfba 2312 "exchange port data request for "
52ef11a7
SS		 2313 "the adapter %s.\n",
2314 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 2315 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2316 lock_flags);
2448c459 2317 return retval;
1da177e4
LT		 2318 }
2319
52ef11a7
SS		 2320 if (data)
2321 fsf_req->data = (unsigned long) data;
2322
2323 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2324 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2325 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2326
2327 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2328 retval = zfcp_fsf_req_send(fsf_req);
2448c459 2329 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1da177e4 2330
52ef11a7
SS		 2331 if (retval)
2332 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2333 "command on the adapter %s\n",
2334 zfcp_get_busid_by_adapter(adapter));
2335 else
2448c459
AH		 2336 wait_event(fsf_req->completion_wq,
2337 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7
SS		 2338
2339 zfcp_fsf_req_free(fsf_req);
2340
1da177e4
LT		 2341 return retval;
2342}
2343
2f8f3ed5
AH		 2344/**
2345 * zfcp_fsf_exchange_port_evaluate
2346 * @fsf_req: fsf_req which belongs to xchg port data request
2347 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
2348 */
2349static void
2350zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2351{
2352 struct zfcp_adapter *adapter;
52ef11a7 2353 struct fsf_qtcb_bottom_port *bottom;
2f8f3ed5
AH		 2354 struct Scsi_Host *shost;
2355
2356 adapter = fsf_req->adapter;
52ef11a7 2357 bottom = &fsf_req->qtcb->bottom.port;
2f8f3ed5
AH		 2358 shost = adapter->scsi_host;
2359
52ef11a7
SS		 2360 if (fsf_req->data)
2361 memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
2362 sizeof(struct fsf_qtcb_bottom_port));
2f8f3ed5
AH		 2363
2364 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
2365 fc_host_permanent_port_name(shost) = bottom->wwpn;
2366 else
2367 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
2368 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
2369 fc_host_supported_speeds(shost) = bottom->supported_speed;
2370}
1da177e4
LT		 2371
2372/**
2373 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2374 * @fsf_req: pointer to struct zfcp_fsf_req
2375 */
2376static void
2377zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2378{
2f8f3ed5
AH		 2379 struct zfcp_adapter *adapter;
2380 struct fsf_qtcb *qtcb;
2381
2382 adapter = fsf_req->adapter;
2383 qtcb = fsf_req->qtcb;
1da177e4
LT		 2384
2385 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2386 return;
2387
aef4a983 2388 switch (qtcb->header.fsf_status) {
1da177e4 2389 case FSF_GOOD:
2f8f3ed5 2390 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
aef4a983 2391 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
aef4a983 2392 break;
aef4a983 2393 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2f8f3ed5 2394 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
aef4a983 2395 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
aef4a983
MS		 2396 zfcp_fsf_link_down_info_eval(adapter,
2397 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 2398 break;
1da177e4 2399 default:
aef4a983
MS		 2400 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");
2401 debug_event(adapter->erp_dbf, 0,
1da177e4
LT		 2402 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2403 }
2404}
2405
2406
2407/*
2408 * function: zfcp_fsf_open_port
2409 *
41fa2ada 2410 * purpose:
1da177e4
LT		 2411 *
2412 * returns: address of initiated FSF request
41fa2ada 2413 * NULL - request could not be initiated
1da177e4
LT		 2414 */
2415int
2416zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2417{
2418 volatile struct qdio_buffer_element *sbale;
2abbe866 2419 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2420 unsigned long lock_flags;
2421 int retval = 0;
2422
2423 /* setup new FSF request */
2424 retval = zfcp_fsf_req_create(erp_action->adapter,
2425 FSF_QTCB_OPEN_PORT_WITH_DID,
2426 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2427 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2428 &lock_flags, &fsf_req);
1da177e4
LT		 2429 if (retval < 0) {
2430 ZFCP_LOG_INFO("error: Could not create open port request "
2431 "for port 0x%016Lx on adapter %s.\n",
2432 erp_action->port->wwpn,
2433 zfcp_get_busid_by_adapter(erp_action->adapter));
2434 goto out;
2435 }
2436
2abbe866 2437 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1da177e4
LT		 2438 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2439 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2440
2abbe866 2441 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1da177e4 2442 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2abbe866
AH		 2443 fsf_req->data = (unsigned long) erp_action->port;
2444 fsf_req->erp_action = erp_action;
2445 erp_action->fsf_req = fsf_req;
1da177e4 2446
2abbe866
AH		 2447 zfcp_erp_start_timer(fsf_req);
2448 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2449 if (retval) {
2450 ZFCP_LOG_INFO("error: Could not send open port request for "
2451 "port 0x%016Lx on adapter %s.\n",
2452 erp_action->port->wwpn,
2453 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 2454 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2455 erp_action->fsf_req = NULL;
2456 goto out;
2457 }
2458
2459 ZFCP_LOG_DEBUG("open port request initiated "
2460 "(adapter %s, port 0x%016Lx)\n",
2461 zfcp_get_busid_by_adapter(erp_action->adapter),
2462 erp_action->port->wwpn);
2463 out:
2464 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2465 lock_flags);
2466 return retval;
2467}
2468
2469/*
2470 * function: zfcp_fsf_open_port_handler
2471 *
2472 * purpose: is called for finished Open Port command
2473 *
41fa2ada 2474 * returns:
1da177e4
LT		 2475 */
2476static int
2477zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2478{
2479 int retval = -EINVAL;
2480 struct zfcp_port *port;
2481 struct fsf_plogi *plogi;
2482 struct fsf_qtcb_header *header;
2483 u16 subtable, rule, counter;
2484
059c97d0 2485 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2486 header = &fsf_req->qtcb->header;
2487
2488 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2489 /* don't change port status in our bookkeeping */
2490 goto skip_fsfstatus;
2491 }
2492
2493 /* evaluate FSF status in QTCB */
2494 switch (header->fsf_status) {
2495
2496 case FSF_PORT_ALREADY_OPEN:
1da177e4
LT		 2497 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2498 "is already open.\n",
2499 port->wwpn, zfcp_get_busid_by_port(port));
2500 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2501 "fsf_s_popen");
2502 /*
2503 * This is a bug, however operation should continue normally
2504 * if it is simply ignored
2505 */
2506 break;
2507
2508 case FSF_ACCESS_DENIED:
1da177e4
LT		 2509 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2510 "on adapter %s\n",
2511 port->wwpn, zfcp_get_busid_by_port(port));
2512 for (counter = 0; counter < 2; counter++) {
2513 subtable = header->fsf_status_qual.halfword[counter * 2];
2514 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2515 switch (subtable) {
2516 case FSF_SQ_CFDC_SUBTABLE_OS:
2517 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2518 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2519 case FSF_SQ_CFDC_SUBTABLE_LUN:
2520 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2521 zfcp_act_subtable_type[subtable], rule);
2522 break;
2523 }
2524 }
2525 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2526 zfcp_erp_port_access_denied(port);
2527 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2528 break;
2529
2530 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1da177e4
LT		 2531 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2532 "The remote port 0x%016Lx on adapter %s "
2533 "could not be opened. Disabling it.\n",
2534 port->wwpn, zfcp_get_busid_by_port(port));
2535 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2536 "fsf_s_max_ports");
2537 zfcp_erp_port_failed(port);
2538 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2539 break;
2540
2541 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2542 switch (header->fsf_status_qual.word[0]) {
2543 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2544 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2545 "fsf_sq_ltest");
2546 /* ERP strategy will escalate */
2547 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2548 break;
2549 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2550 /* ERP strategy will escalate */
2551 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2552 "fsf_sq_ulp");
2553 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2554 break;
2555 case FSF_SQ_NO_RETRY_POSSIBLE:
1da177e4
LT		 2556 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2557 "adapter %s could not be opened. "
2558 "Disabling it.\n",
2559 port->wwpn,
2560 zfcp_get_busid_by_port(port));
2561 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2562 "fsf_sq_no_retry");
2563 zfcp_erp_port_failed(port);
2564 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2565 break;
2566 default:
2567 ZFCP_LOG_NORMAL
2568 ("bug: Wrong status qualifier 0x%x arrived.\n",
2569 header->fsf_status_qual.word[0]);
2570 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2571 "fsf_sq_inval:");
2572 debug_exception(
2573 fsf_req->adapter->erp_dbf, 0,
2574 &header->fsf_status_qual.word[0],
2575 sizeof (u32));
2576 break;
2577 }
2578 break;
2579
2580 case FSF_GOOD:
1da177e4
LT		 2581 /* save port handle assigned by FSF */
2582 port->handle = header->port_handle;
2583 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2584 "was opened, it's port handle is 0x%x\n",
2585 port->wwpn, zfcp_get_busid_by_port(port),
2586 port->handle);
2587 /* mark port as open */
2588 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2589 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 2590 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2591 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2592 &port->status);
1da177e4
LT		 2593 retval = 0;
2594 /* check whether D_ID has changed during open */
2595 /*
2596 * FIXME: This check is not airtight, as the FCP channel does
2597 * not monitor closures of target port connections caused on
2598 * the remote side. Thus, they might miss out on invalidating
2599 * locally cached WWPNs (and other N_Port parameters) of gone
2600 * target ports. So, our heroic attempt to make things safe
2601 * could be undermined by 'open port' response data tagged with
2602 * obsolete WWPNs. Another reason to monitor potential
2603 * connection closures ourself at least (by interpreting
2604 * incoming ELS' and unsolicited status). It just crosses my
2605 * mind that one should be able to cross-check by means of
2606 * another GID_PN straight after a port has been opened.
2607 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2608 */
2609 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2610 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2611 {
2612 if (fsf_req->qtcb->bottom.support.els1_length <
75bfc283 2613 sizeof (struct fsf_plogi)) {
1da177e4
LT		 2614 ZFCP_LOG_INFO(
2615 "warning: insufficient length of "
2616 "PLOGI payload (%i)\n",
2617 fsf_req->qtcb->bottom.support.els1_length);
2618 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2619 "fsf_s_short_plogi:");
2620 /* skip sanity check and assume wwpn is ok */
2621 } else {
2622 if (plogi->serv_param.wwpn != port->wwpn) {
2623 ZFCP_LOG_INFO("warning: d_id of port "
2624 "0x%016Lx changed during "
2625 "open\n", port->wwpn);
2626 debug_text_event(
2627 fsf_req->adapter->erp_dbf, 0,
2628 "fsf_s_did_change:");
2629 atomic_clear_mask(
2630 ZFCP_STATUS_PORT_DID_DID,
2631 &port->status);
75bfc283 2632 } else {
1da177e4 2633 port->wwnn = plogi->serv_param.wwnn;
75bfc283
RW		 2634 zfcp_plogi_evaluate(port, plogi);
2635 }
1da177e4
LT		 2636 }
2637 }
2638 break;
2639
2640 case FSF_UNKNOWN_OP_SUBTYPE:
2641 /* should never occure, subtype not set in zfcp_fsf_open_port */
1da177e4
LT		 2642 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2643 "op_subtype=0x%x)\n",
2644 zfcp_get_busid_by_port(port),
2645 fsf_req->qtcb->bottom.support.operation_subtype);
2646 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2647 break;
2648
2649 default:
2650 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2651 "(debug info 0x%x)\n",
2652 header->fsf_status);
2653 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2654 debug_exception(fsf_req->adapter->erp_dbf, 0,
2655 &header->fsf_status, sizeof (u32));
2656 break;
2657 }
2658
2659 skip_fsfstatus:
2660 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2661 return retval;
2662}
2663
2664/*
2665 * function: zfcp_fsf_close_port
2666 *
2667 * purpose: submit FSF command "close port"
2668 *
2669 * returns: address of initiated FSF request
2670 * NULL - request could not be initiated
2671 */
2672int
2673zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2674{
2675 volatile struct qdio_buffer_element *sbale;
2abbe866 2676 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2677 unsigned long lock_flags;
2678 int retval = 0;
2679
2680 /* setup new FSF request */
2681 retval = zfcp_fsf_req_create(erp_action->adapter,
2682 FSF_QTCB_CLOSE_PORT,
2683 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2684 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2685 &lock_flags, &fsf_req);
1da177e4
LT		 2686 if (retval < 0) {
2687 ZFCP_LOG_INFO("error: Could not create a close port request "
2688 "for port 0x%016Lx on adapter %s.\n",
2689 erp_action->port->wwpn,
2690 zfcp_get_busid_by_adapter(erp_action->adapter));
2691 goto out;
2692 }
2693
2abbe866 2694 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1da177e4
LT		 2695 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2696 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2697
2698 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2abbe866
AH		 2699 fsf_req->data = (unsigned long) erp_action->port;
2700 fsf_req->erp_action = erp_action;
2701 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2702 fsf_req->erp_action = erp_action;
2703 erp_action->fsf_req = fsf_req;
2704
2705 zfcp_erp_start_timer(fsf_req);
2706 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2707 if (retval) {
2708 ZFCP_LOG_INFO("error: Could not send a close port request for "
2709 "port 0x%016Lx on adapter %s.\n",
2710 erp_action->port->wwpn,
2711 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 2712 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2713 erp_action->fsf_req = NULL;
2714 goto out;
2715 }
2716
2717 ZFCP_LOG_TRACE("close port request initiated "
2718 "(adapter %s, port 0x%016Lx)\n",
2719 zfcp_get_busid_by_adapter(erp_action->adapter),
2720 erp_action->port->wwpn);
2721 out:
2722 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2723 lock_flags);
2724 return retval;
2725}
2726
2727/*
2728 * function: zfcp_fsf_close_port_handler
2729 *
2730 * purpose: is called for finished Close Port FSF command
2731 *
2732 * returns:
2733 */
2734static int
2735zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2736{
2737 int retval = -EINVAL;
2738 struct zfcp_port *port;
2739
059c97d0 2740 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2741
2742 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2743 /* don't change port status in our bookkeeping */
2744 goto skip_fsfstatus;
2745 }
2746
2747 /* evaluate FSF status in QTCB */
2748 switch (fsf_req->qtcb->header.fsf_status) {
2749
2750 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2751 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2752 "0x%016Lx on adapter %s invalid. This may happen "
2753 "occasionally.\n", port->handle,
2754 port->wwpn, zfcp_get_busid_by_port(port));
2755 ZFCP_LOG_DEBUG("status qualifier:\n");
2756 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2757 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2758 sizeof (union fsf_status_qual));
2759 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2760 "fsf_s_phand_nv");
2761 zfcp_erp_adapter_reopen(port->adapter, 0);
2762 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2763 break;
2764
2765 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2766 /* Note: FSF has actually closed the port in this case.
2767 * The status code is just daft. Fingers crossed for a change
2768 */
2769 retval = 0;
2770 break;
2771
2772 case FSF_GOOD:
1da177e4
LT		 2773 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2774 "port handle 0x%x\n", port->wwpn,
2775 zfcp_get_busid_by_port(port), port->handle);
2776 zfcp_erp_modify_port_status(port,
2777 ZFCP_STATUS_COMMON_OPEN,
2778 ZFCP_CLEAR);
2779 retval = 0;
2780 break;
2781
2782 default:
2783 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2784 "(debug info 0x%x)\n",
2785 fsf_req->qtcb->header.fsf_status);
2786 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2787 debug_exception(fsf_req->adapter->erp_dbf, 0,
2788 &fsf_req->qtcb->header.fsf_status,
2789 sizeof (u32));
2790 break;
2791 }
2792
2793 skip_fsfstatus:
2794 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2795 return retval;
2796}
2797
2798/*
2799 * function: zfcp_fsf_close_physical_port
2800 *
2801 * purpose: submit FSF command "close physical port"
2802 *
2803 * returns: address of initiated FSF request
2804 * NULL - request could not be initiated
2805 */
2806int
2807zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2808{
1da177e4 2809 volatile struct qdio_buffer_element *sbale;
2abbe866
AH		 2810 struct zfcp_fsf_req *fsf_req;
2811 unsigned long lock_flags;
2812 int retval = 0;
1da177e4
LT		 2813
2814 /* setup new FSF request */
2815 retval = zfcp_fsf_req_create(erp_action->adapter,
2816 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2817 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2818 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2819 &lock_flags, &fsf_req);
1da177e4
LT		 2820 if (retval < 0) {
2821 ZFCP_LOG_INFO("error: Could not create close physical port "
2822 "request (adapter %s, port 0x%016Lx)\n",
2823 zfcp_get_busid_by_adapter(erp_action->adapter),
2824 erp_action->port->wwpn);
2825
2826 goto out;
2827 }
2828
2abbe866 2829 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1da177e4
LT		 2830 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2831 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2832
2833 /* mark port as being closed */
2834 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2835 &erp_action->port->status);
2836 /* save a pointer to this port */
2abbe866
AH		 2837 fsf_req->data = (unsigned long) erp_action->port;
2838 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2839 fsf_req->erp_action = erp_action;
2840 erp_action->fsf_req = fsf_req;
2841
2842 zfcp_erp_start_timer(fsf_req);
2843 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2844 if (retval) {
2845 ZFCP_LOG_INFO("error: Could not send close physical port "
2846 "request (adapter %s, port 0x%016Lx)\n",
2847 zfcp_get_busid_by_adapter(erp_action->adapter),
2848 erp_action->port->wwpn);
2abbe866 2849 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2850 erp_action->fsf_req = NULL;
2851 goto out;
2852 }
2853
2854 ZFCP_LOG_TRACE("close physical port request initiated "
2855 "(adapter %s, port 0x%016Lx)\n",
2856 zfcp_get_busid_by_adapter(erp_action->adapter),
2857 erp_action->port->wwpn);
2858 out:
2859 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2860 lock_flags);
2861 return retval;
2862}
2863
2864/*
2865 * function: zfcp_fsf_close_physical_port_handler
2866 *
2867 * purpose: is called for finished Close Physical Port FSF command
2868 *
2869 * returns:
2870 */
2871static int
2872zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2873{
2874 int retval = -EINVAL;
2875 struct zfcp_port *port;
2876 struct zfcp_unit *unit;
2877 struct fsf_qtcb_header *header;
2878 u16 subtable, rule, counter;
2879
059c97d0 2880 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2881 header = &fsf_req->qtcb->header;
2882
2883 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2884 /* don't change port status in our bookkeeping */
2885 goto skip_fsfstatus;
2886 }
2887
2888 /* evaluate FSF status in QTCB */
2889 switch (header->fsf_status) {
2890
2891 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2892 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2893 "(adapter %s, port 0x%016Lx). "
2894 "This may happen occasionally.\n",
2895 port->handle,
2896 zfcp_get_busid_by_port(port),
2897 port->wwpn);
2898 ZFCP_LOG_DEBUG("status qualifier:\n");
2899 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2900 (char *) &header->fsf_status_qual,
2901 sizeof (union fsf_status_qual));
2902 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2903 "fsf_s_phand_nv");
2904 zfcp_erp_adapter_reopen(port->adapter, 0);
2905 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2906 break;
2907
2908 case FSF_ACCESS_DENIED:
1da177e4
LT		 2909 ZFCP_LOG_NORMAL("Access denied, cannot close "
2910 "physical port 0x%016Lx on adapter %s\n",
2911 port->wwpn, zfcp_get_busid_by_port(port));
2912 for (counter = 0; counter < 2; counter++) {
2913 subtable = header->fsf_status_qual.halfword[counter * 2];
2914 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2915 switch (subtable) {
2916 case FSF_SQ_CFDC_SUBTABLE_OS:
2917 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2918 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2919 case FSF_SQ_CFDC_SUBTABLE_LUN:
2920 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2921 zfcp_act_subtable_type[subtable], rule);
2922 break;
2923 }
2924 }
2925 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2926 zfcp_erp_port_access_denied(port);
2927 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2928 break;
2929
2930 case FSF_PORT_BOXED:
1da177e4
LT		 2931 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2932 "%s needs to be reopened but it was attempted "
2933 "to close it physically.\n",
2934 port->wwpn,
2935 zfcp_get_busid_by_port(port));
2936 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
d736a27b 2937 zfcp_erp_port_boxed(port);
1da177e4
LT		 2938 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2939 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 2940
2941 /* can't use generic zfcp_erp_modify_port_status because
2942 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2943 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2944 list_for_each_entry(unit, &port->unit_list_head, list)
2945 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
2946 &unit->status);
1da177e4
LT		 2947 break;
2948
2949 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2950 switch (header->fsf_status_qual.word[0]) {
2951 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2952 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2953 "fsf_sq_ltest");
2954 /* This will now be escalated by ERP */
2955 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2956 break;
2957 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 2958 /* ERP strategy will escalate */
2959 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2960 "fsf_sq_ulp");
2961 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2962 break;
2963 default:
2964 ZFCP_LOG_NORMAL
2965 ("bug: Wrong status qualifier 0x%x arrived.\n",
2966 header->fsf_status_qual.word[0]);
2967 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2968 "fsf_sq_inval:");
2969 debug_exception(
2970 fsf_req->adapter->erp_dbf, 0,
2971 &header->fsf_status_qual.word[0], sizeof (u32));
2972 break;
2973 }
2974 break;
2975
2976 case FSF_GOOD:
1da177e4
LT		 2977 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2978 "physically closed, port handle 0x%x\n",
2979 port->wwpn,
2980 zfcp_get_busid_by_port(port), port->handle);
2981 /* can't use generic zfcp_erp_modify_port_status because
2982 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2983 */
2984 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2985 list_for_each_entry(unit, &port->unit_list_head, list)
2986 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2987 retval = 0;
2988 break;
2989
2990 default:
2991 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2992 "(debug info 0x%x)\n",
2993 header->fsf_status);
2994 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2995 debug_exception(fsf_req->adapter->erp_dbf, 0,
2996 &header->fsf_status, sizeof (u32));
2997 break;
2998 }
2999
3000 skip_fsfstatus:
3001 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
3002 return retval;
3003}
3004
3005/*
3006 * function: zfcp_fsf_open_unit
3007 *
3008 * purpose:
3009 *
3010 * returns:
3011 *
3012 * assumptions: This routine does not check whether the associated
3013 * remote port has already been opened. This should be
3014 * done by calling routines. Otherwise some status
3015 * may be presented by FSF
3016 */
3017int
3018zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
3019{
3020 volatile struct qdio_buffer_element *sbale;
2abbe866 3021 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 3022 unsigned long lock_flags;
3023 int retval = 0;
3024
3025 /* setup new FSF request */
3026 retval = zfcp_fsf_req_create(erp_action->adapter,
3027 FSF_QTCB_OPEN_LUN,
3028 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3029 erp_action->adapter->pool.fsf_req_erp,
2abbe866 3030 &lock_flags, &fsf_req);
1da177e4
LT		 3031 if (retval < 0) {
3032 ZFCP_LOG_INFO("error: Could not create open unit request for "
3033 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3034 erp_action->unit->fcp_lun,
3035 erp_action->unit->port->wwpn,
3036 zfcp_get_busid_by_adapter(erp_action->adapter));
3037 goto out;
3038 }
3039
2abbe866 3040 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1da177e4
LT		 3041 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3042 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3043
2abbe866
AH		 3044 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3045 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
aef4a983 3046 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2abbe866 3047 fsf_req->qtcb->bottom.support.option =
06506d00 3048 FSF_OPEN_LUN_SUPPRESS_BOXING;
1da177e4 3049 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2abbe866
AH		 3050 fsf_req->data = (unsigned long) erp_action->unit;
3051 fsf_req->erp_action = erp_action;
3052 erp_action->fsf_req = fsf_req;
1da177e4 3053
2abbe866
AH		 3054 zfcp_erp_start_timer(fsf_req);
3055 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4
LT		 3056 if (retval) {
3057 ZFCP_LOG_INFO("error: Could not send an open unit request "
3058 "on the adapter %s, port 0x%016Lx for "
3059 "unit 0x%016Lx\n",
3060 zfcp_get_busid_by_adapter(erp_action->adapter),
3061 erp_action->port->wwpn,
3062 erp_action->unit->fcp_lun);
2abbe866 3063 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 3064 erp_action->fsf_req = NULL;
3065 goto out;
3066 }
3067
3068 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3069 "port 0x%016Lx, unit 0x%016Lx)\n",
3070 zfcp_get_busid_by_adapter(erp_action->adapter),
3071 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3072 out:
3073 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3074 lock_flags);
3075 return retval;
3076}
3077
3078/*
3079 * function: zfcp_fsf_open_unit_handler
3080 *
3081 * purpose: is called for finished Open LUN command
3082 *
41fa2ada 3083 * returns:
1da177e4
LT		 3084 */
3085static int
3086zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3087{
3088 int retval = -EINVAL;
3089 struct zfcp_adapter *adapter;
3090 struct zfcp_unit *unit;
3091 struct fsf_qtcb_header *header;
3092 struct fsf_qtcb_bottom_support *bottom;
3093 struct fsf_queue_designator *queue_designator;
3094 u16 subtable, rule, counter;
aef4a983 3095 int exclusive, readwrite;
1da177e4 3096
059c97d0 3097 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 3098
3099 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3100 /* don't change unit status in our bookkeeping */
3101 goto skip_fsfstatus;
3102 }
3103
3104 adapter = fsf_req->adapter;
3105 header = &fsf_req->qtcb->header;
3106 bottom = &fsf_req->qtcb->bottom.support;
3107 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3108
1da177e4 3109 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 3110 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 3111 ZFCP_STATUS_UNIT_SHARED |
3112 ZFCP_STATUS_UNIT_READONLY,
3113 &unit->status);
3114
3115 /* evaluate FSF status in QTCB */
3116 switch (header->fsf_status) {
3117
3118 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3119 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3120 "for port 0x%016Lx on adapter %s invalid "
3121 "This may happen occasionally\n",
3122 unit->port->handle,
3123 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3124 ZFCP_LOG_DEBUG("status qualifier:\n");
3125 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3126 (char *) &header->fsf_status_qual,
3127 sizeof (union fsf_status_qual));
3128 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3129 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3130 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3131 break;
3132
3133 case FSF_LUN_ALREADY_OPEN:
1da177e4
LT		 3134 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3135 "remote port 0x%016Lx on adapter %s twice.\n",
3136 unit->fcp_lun,
3137 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3138 debug_text_exception(adapter->erp_dbf, 0,
3139 "fsf_s_uopen");
3140 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3141 break;
3142
3143 case FSF_ACCESS_DENIED:
1da177e4
LT		 3144 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3145 "remote port 0x%016Lx on adapter %s\n",
3146 unit->fcp_lun, unit->port->wwpn,
3147 zfcp_get_busid_by_unit(unit));
3148 for (counter = 0; counter < 2; counter++) {
3149 subtable = header->fsf_status_qual.halfword[counter * 2];
3150 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3151 switch (subtable) {
3152 case FSF_SQ_CFDC_SUBTABLE_OS:
3153 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3154 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3155 case FSF_SQ_CFDC_SUBTABLE_LUN:
3156 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3157 zfcp_act_subtable_type[subtable], rule);
3158 break;
3159 }
3160 }
3161 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3162 zfcp_erp_unit_access_denied(unit);
3163 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3164 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3165 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3166 break;
3167
3168 case FSF_PORT_BOXED:
1da177e4
LT		 3169 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3170 "needs to be reopened\n",
3171 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3172 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3173 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3174 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3175 ZFCP_STATUS_FSFREQ_RETRY;
3176 break;
3177
3178 case FSF_LUN_SHARING_VIOLATION:
1da177e4
LT		 3179 if (header->fsf_status_qual.word[0] != 0) {
3180 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3181 "with WWPN 0x%Lx "
3182 "connected to the adapter %s "
3183 "is already in use in LPAR%d, CSS%d\n",
3184 unit->fcp_lun,
3185 unit->port->wwpn,
3186 zfcp_get_busid_by_unit(unit),
3187 queue_designator->hla,
3188 queue_designator->cssid);
3189 } else {
3190 subtable = header->fsf_status_qual.halfword[4];
3191 rule = header->fsf_status_qual.halfword[5];
3192 switch (subtable) {
3193 case FSF_SQ_CFDC_SUBTABLE_OS:
3194 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3195 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3196 case FSF_SQ_CFDC_SUBTABLE_LUN:
3197 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3198 "remote port with WWPN 0x%Lx "
3199 "connected to the adapter %s "
3200 "is denied (%s rule %d)\n",
3201 unit->fcp_lun,
3202 unit->port->wwpn,
3203 zfcp_get_busid_by_unit(unit),
3204 zfcp_act_subtable_type[subtable],
3205 rule);
3206 break;
3207 }
3208 }
3209 ZFCP_LOG_DEBUG("status qualifier:\n");
3210 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3211 (char *) &header->fsf_status_qual,
3212 sizeof (union fsf_status_qual));
3213 debug_text_event(adapter->erp_dbf, 2,
3214 "fsf_s_l_sh_vio");
3215 zfcp_erp_unit_access_denied(unit);
3216 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3217 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3218 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3219 break;
3220
3221 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1da177e4
LT		 3222 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3223 "There is no handle (temporary port identifier) "
3224 "available for unit 0x%016Lx on port 0x%016Lx "
3225 "on adapter %s\n",
3226 unit->fcp_lun,
3227 unit->port->wwpn,
3228 zfcp_get_busid_by_unit(unit));
3229 debug_text_event(adapter->erp_dbf, 1,
3230 "fsf_s_max_units");
3231 zfcp_erp_unit_failed(unit);
3232 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3233 break;
3234
3235 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3236 switch (header->fsf_status_qual.word[0]) {
3237 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3238 /* Re-establish link to port */
3239 debug_text_event(adapter->erp_dbf, 1,
3240 "fsf_sq_ltest");
65a8d4e1 3241 zfcp_test_link(unit->port);
1da177e4
LT		 3242 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3243 break;
3244 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3245 /* ERP strategy will escalate */
3246 debug_text_event(adapter->erp_dbf, 1,
3247 "fsf_sq_ulp");
3248 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3249 break;
3250 default:
3251 ZFCP_LOG_NORMAL
3252 ("bug: Wrong status qualifier 0x%x arrived.\n",
3253 header->fsf_status_qual.word[0]);
3254 debug_text_event(adapter->erp_dbf, 0,
3255 "fsf_sq_inval:");
3256 debug_exception(adapter->erp_dbf, 0,
3257 &header->fsf_status_qual.word[0],
3258 sizeof (u32));
3259 }
3260 break;
3261
3262 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 3263 ZFCP_LOG_NORMAL(
3264 "Invalid option 0x%x has been specified "
3265 "in QTCB bottom sent to the adapter %s\n",
3266 bottom->option,
3267 zfcp_get_busid_by_adapter(adapter));
3268 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3269 retval = -EINVAL;
3270 break;
3271
3272 case FSF_GOOD:
1da177e4
LT		 3273 /* save LUN handle assigned by FSF */
3274 unit->handle = header->lun_handle;
3275 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3276 "adapter %s opened, port handle 0x%x\n",
3277 unit->fcp_lun,
3278 unit->port->wwpn,
3279 zfcp_get_busid_by_unit(unit),
3280 unit->handle);
3281 /* mark unit as open */
3282 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 3283
3284 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3285 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3286 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3287 exclusive = (bottom->lun_access_info &
3288 FSF_UNIT_ACCESS_EXCLUSIVE);
3289 readwrite = (bottom->lun_access_info &
3290 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3291
1da177e4
LT		 3292 if (!exclusive)
3293 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3294 &unit->status);
3295
3296 if (!readwrite) {
3297 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3298 &unit->status);
3299 ZFCP_LOG_NORMAL("read-only access for unit "
3300 "(adapter %s, wwpn=0x%016Lx, "
3301 "fcp_lun=0x%016Lx)\n",
3302 zfcp_get_busid_by_unit(unit),
3303 unit->port->wwpn,
3304 unit->fcp_lun);
3305 }
3306
3307 if (exclusive && !readwrite) {
3308 ZFCP_LOG_NORMAL("exclusive access of read-only "
3309 "unit not supported\n");
3310 zfcp_erp_unit_failed(unit);
3311 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3312 zfcp_erp_unit_shutdown(unit, 0);
3313 } else if (!exclusive && readwrite) {
3314 ZFCP_LOG_NORMAL("shared access of read-write "
3315 "unit not supported\n");
3316 zfcp_erp_unit_failed(unit);
3317 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3318 zfcp_erp_unit_shutdown(unit, 0);
3319 }
3320 }
3321
3322 retval = 0;
3323 break;
3324
3325 default:
3326 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3327 "(debug info 0x%x)\n",
3328 header->fsf_status);
3329 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3330 debug_exception(adapter->erp_dbf, 0,
3331 &header->fsf_status, sizeof (u32));
3332 break;
3333 }
3334
3335 skip_fsfstatus:
3336 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3337 return retval;
3338}
3339
3340/*
3341 * function: zfcp_fsf_close_unit
3342 *
3343 * purpose:
3344 *
3345 * returns: address of fsf_req - request successfully initiated
41fa2ada 3346 * NULL -
1da177e4
LT		 3347 *
3348 * assumptions: This routine does not check whether the associated
3349 * remote port/lun has already been opened. This should be
3350 * done by calling routines. Otherwise some status
3351 * may be presented by FSF
3352 */
3353int
3354zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3355{
3356 volatile struct qdio_buffer_element *sbale;
2abbe866 3357 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 3358 unsigned long lock_flags;
3359 int retval = 0;
3360
3361 /* setup new FSF request */
3362 retval = zfcp_fsf_req_create(erp_action->adapter,
3363 FSF_QTCB_CLOSE_LUN,
3364 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3365 erp_action->adapter->pool.fsf_req_erp,
2abbe866 3366 &lock_flags, &fsf_req);
1da177e4
LT		 3367 if (retval < 0) {
3368 ZFCP_LOG_INFO("error: Could not create close unit request for "
3369 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3370 erp_action->unit->fcp_lun,
3371 erp_action->port->wwpn,
3372 zfcp_get_busid_by_adapter(erp_action->adapter));
3373 goto out;
3374 }
3375
2abbe866 3376 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1da177e4
LT		 3377 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3378 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3379
2abbe866
AH		 3380 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3381 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
1da177e4 3382 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
2abbe866
AH		 3383 fsf_req->data = (unsigned long) erp_action->unit;
3384 fsf_req->erp_action = erp_action;
3385 erp_action->fsf_req = fsf_req;
1da177e4 3386
2abbe866
AH		 3387 zfcp_erp_start_timer(fsf_req);
3388 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4
LT		 3389 if (retval) {
3390 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3391 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3392 erp_action->unit->fcp_lun,
3393 erp_action->port->wwpn,
3394 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 3395 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 3396 erp_action->fsf_req = NULL;
3397 goto out;
3398 }
3399
3400 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3401 "port 0x%016Lx, unit 0x%016Lx)\n",
3402 zfcp_get_busid_by_adapter(erp_action->adapter),
3403 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3404 out:
3405 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3406 lock_flags);
3407 return retval;
3408}
3409
3410/*
3411 * function: zfcp_fsf_close_unit_handler
3412 *
3413 * purpose: is called for finished Close LUN FSF command
3414 *
3415 * returns:
3416 */
3417static int
3418zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3419{
3420 int retval = -EINVAL;
3421 struct zfcp_unit *unit;
3422
059c97d0 3423 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 3424
3425 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3426 /* don't change unit status in our bookkeeping */
3427 goto skip_fsfstatus;
3428 }
3429
3430 /* evaluate FSF status in QTCB */
3431 switch (fsf_req->qtcb->header.fsf_status) {
3432
3433 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3434 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3435 "0x%016Lx on adapter %s invalid. This may "
3436 "happen in rare circumstances\n",
3437 unit->port->handle,
3438 unit->port->wwpn,
3439 zfcp_get_busid_by_unit(unit));
3440 ZFCP_LOG_DEBUG("status qualifier:\n");
3441 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3442 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3443 sizeof (union fsf_status_qual));
3444 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3445 "fsf_s_phand_nv");
3446 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1da177e4
LT		 3447 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3448 break;
3449
3450 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3451 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3452 "0x%016Lx on port 0x%016Lx on adapter %s is "
3453 "invalid. This may happen occasionally.\n",
3454 unit->handle,
3455 unit->fcp_lun,
3456 unit->port->wwpn,
3457 zfcp_get_busid_by_unit(unit));
3458 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3459 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3460 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3461 sizeof (union fsf_status_qual));
3462 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3463 "fsf_s_lhand_nv");
3464 zfcp_erp_port_reopen(unit->port, 0);
1da177e4
LT		 3465 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3466 break;
3467
3468 case FSF_PORT_BOXED:
1da177e4
LT		 3469 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3470 "needs to be reopened\n",
3471 unit->port->wwpn,
3472 zfcp_get_busid_by_unit(unit));
3473 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3474 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3475 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3476 ZFCP_STATUS_FSFREQ_RETRY;
3477 break;
3478
3479 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3480 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3481 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3482 /* re-establish link to port */
3483 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3484 "fsf_sq_ltest");
65a8d4e1 3485 zfcp_test_link(unit->port);
1da177e4
LT		 3486 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3487 break;
3488 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3489 /* ERP strategy will escalate */
3490 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3491 "fsf_sq_ulp");
3492 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3493 break;
3494 default:
3495 ZFCP_LOG_NORMAL
3496 ("bug: Wrong status qualifier 0x%x arrived.\n",
3497 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3498 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3499 "fsf_sq_inval:");
3500 debug_exception(
3501 fsf_req->adapter->erp_dbf, 0,
3502 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3503 sizeof (u32));
3504 break;
3505 }
3506 break;
3507
3508 case FSF_GOOD:
1da177e4
LT		 3509 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3510 "closed, port handle 0x%x\n",
3511 unit->fcp_lun,
3512 unit->port->wwpn,
3513 zfcp_get_busid_by_unit(unit),
3514 unit->handle);
3515 /* mark unit as closed */
3516 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3517 retval = 0;
3518 break;
3519
3520 default:
3521 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3522 "(debug info 0x%x)\n",
3523 fsf_req->qtcb->header.fsf_status);
3524 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3525 debug_exception(fsf_req->adapter->erp_dbf, 0,
3526 &fsf_req->qtcb->header.fsf_status,
3527 sizeof (u32));
3528 break;
3529 }
3530
3531 skip_fsfstatus:
3532 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3533 return retval;
3534}
3535
3536/**
3537 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3538 * @adapter: adapter where scsi command is issued
3539 * @unit: unit where command is sent to
3540 * @scsi_cmnd: scsi command to be sent
3541 * @timer: timer to be started when request is initiated
3542 * @req_flags: flags for fsf_request
3543 */
3544int
3545zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3546 struct zfcp_unit *unit,
3547 struct scsi_cmnd * scsi_cmnd,
2abbe866 3548 int use_timer, int req_flags)
1da177e4
LT		 3549{
3550 struct zfcp_fsf_req *fsf_req = NULL;
3551 struct fcp_cmnd_iu *fcp_cmnd_iu;
3552 unsigned int sbtype;
3553 unsigned long lock_flags;
3554 int real_bytes = 0;
3555 int retval = 0;
3556 int mask;
3557
3558 /* setup new FSF request */
3559 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3560 adapter->pool.fsf_req_scsi,
3561 &lock_flags, &fsf_req);
3562 if (unlikely(retval < 0)) {
3563 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3564 "for unit 0x%016Lx on port 0x%016Lx on "
3565 "adapter %s\n",
3566 unit->fcp_lun,
3567 unit->port->wwpn,
3568 zfcp_get_busid_by_adapter(adapter));
3569 goto failed_req_create;
3570 }
3571
ba172420
CS		 3572 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
3573 &unit->status))) {
3574 retval = -EBUSY;
3575 goto unit_blocked;
3576 }
3577
059c97d0
AH		 3578 zfcp_unit_get(unit);
3579 fsf_req->unit = unit;
1da177e4 3580
059c97d0 3581 /* associate FSF request with SCSI request (for look up on abort) */
4eff4a36 3582 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
059c97d0
AH		 3583
3584 /* associate SCSI command with FSF request */
3585 fsf_req->data = (unsigned long) scsi_cmnd;
1da177e4
LT		 3586
3587 /* set handles of unit and its parent port in QTCB */
3588 fsf_req->qtcb->header.lun_handle = unit->handle;
3589 fsf_req->qtcb->header.port_handle = unit->port->handle;
3590
3591 /* FSF does not define the structure of the FCP_CMND IU */
3592 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3593 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3594
3595 /*
3596 * set depending on data direction:
3597 * data direction bits in SBALE (SB Type)
3598 * data direction bits in QTCB
3599 * data direction bits in FCP_CMND IU
3600 */
3601 switch (scsi_cmnd->sc_data_direction) {
3602 case DMA_NONE:
1da177e4
LT		 3603 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3604 /*
3605 * FIXME(qdio):
3606 * what is the correct type for commands
3607 * without 'real' data buffers?
3608 */
3609 sbtype = SBAL_FLAGS0_TYPE_READ;
3610 break;
3611 case DMA_FROM_DEVICE:
1da177e4
LT		 3612 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3613 sbtype = SBAL_FLAGS0_TYPE_READ;
3614 fcp_cmnd_iu->rddata = 1;
3615 break;
3616 case DMA_TO_DEVICE:
1da177e4
LT		 3617 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3618 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3619 fcp_cmnd_iu->wddata = 1;
3620 break;
3621 case DMA_BIDIRECTIONAL:
1da177e4
LT		 3622 default:
3623 /*
3624 * dummy, catch this condition earlier
3625 * in zfcp_scsi_queuecommand
3626 */
3627 goto failed_scsi_cmnd;
3628 }
3629
3630 /* set FC service class in QTCB (3 per default) */
06506d00 3631 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 3632
3633 /* set FCP_LUN in FCP_CMND IU in QTCB */
3634 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3635
3636 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3637
3638 /* set task attributes in FCP_CMND IU in QTCB */
3639 if (likely((scsi_cmnd->device->simple_tags) ||
3640 (atomic_test_mask(mask, &unit->status))))
3641 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3642 else
3643 fcp_cmnd_iu->task_attribute = UNTAGGED;
3644
3645 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3646 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3647 fcp_cmnd_iu->add_fcp_cdb_length
3648 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3649 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3650 "additional FCP_CDB length is 0x%x "
3651 "(shifted right 2 bits)\n",
3652 scsi_cmnd->cmd_len,
3653 fcp_cmnd_iu->add_fcp_cdb_length);
3654 }
3655 /*
3656 * copy SCSI CDB (including additional length, if any) to
3657 * FCP_CDB in FCP_CMND IU in QTCB
3658 */
3659 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3660
3661 /* FCP CMND IU length in QTCB */
3662 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3663 sizeof (struct fcp_cmnd_iu) +
3664 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3665
3666 /* generate SBALEs from data buffer */
3667 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3668 if (unlikely(real_bytes < 0)) {
3669 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3670 ZFCP_LOG_DEBUG(
3671 "Data did not fit into available buffer(s), "
3672 "waiting for more...\n");
2282f658
CS		 3673 retval = -EIO;
3674 } else {
3675 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3676 "required. Shutting down unit "
3677 "(adapter %s, port 0x%016Lx, "
3678 "unit 0x%016Lx)\n",
3679 zfcp_get_busid_by_unit(unit),
3680 unit->port->wwpn,
3681 unit->fcp_lun);
3682 zfcp_erp_unit_shutdown(unit, 0);
3683 retval = -EINVAL;
1da177e4
LT		 3684 }
3685 goto no_fit;
3686 }
3687
3688 /* set length of FCP data length in FCP_CMND IU in QTCB */
3689 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3690
3691 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3692 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3693 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3694
2abbe866
AH		 3695 if (use_timer)
3696 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3697
3698 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 3699 if (unlikely(retval < 0)) {
3700 ZFCP_LOG_INFO("error: Could not send FCP command request "
3701 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3702 zfcp_get_busid_by_adapter(adapter),
3703 unit->port->wwpn,
3704 unit->fcp_lun);
3705 goto send_failed;
3706 }
3707
3708 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3709 "port 0x%016Lx, unit 0x%016Lx)\n",
3710 zfcp_get_busid_by_adapter(adapter),
3711 unit->port->wwpn,
3712 unit->fcp_lun);
3713 goto success;
3714
3715 send_failed:
3716 no_fit:
3717 failed_scsi_cmnd:
ba172420 3718 unit_blocked:
059c97d0 3719 zfcp_unit_put(unit);
1da177e4
LT		 3720 zfcp_fsf_req_free(fsf_req);
3721 fsf_req = NULL;
3722 scsi_cmnd->host_scribble = NULL;
3723 success:
3724 failed_req_create:
3725 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3726 return retval;
3727}
3728
1da177e4
LT		 3729struct zfcp_fsf_req *
3730zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3731 struct zfcp_unit *unit,
3732 u8 tm_flags, int req_flags)
3733{
3734 struct zfcp_fsf_req *fsf_req = NULL;
3735 int retval = 0;
3736 struct fcp_cmnd_iu *fcp_cmnd_iu;
3737 unsigned long lock_flags;
3738 volatile struct qdio_buffer_element *sbale;
3739
3740 /* setup new FSF request */
3741 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3742 adapter->pool.fsf_req_scsi,
3743 &lock_flags, &fsf_req);
3744 if (retval < 0) {
3745 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3746 "management) request for adapter %s, port "
3747 " 0x%016Lx, unit 0x%016Lx.\n",
3748 zfcp_get_busid_by_adapter(adapter),
3749 unit->port->wwpn, unit->fcp_lun);
3750 goto out;
3751 }
3752
fdf23452
CS		 3753 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
3754 &unit->status)))
3755 goto unit_blocked;
3756
1da177e4
LT		 3757 /*
3758 * Used to decide on proper handler in the return path,
3759 * could be either zfcp_fsf_send_fcp_command_task_handler or
3760 * zfcp_fsf_send_fcp_command_task_management_handler */
3761
3762 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3763
3764 /*
3765 * hold a pointer to the unit being target of this
3766 * task management request
3767 */
059c97d0 3768 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 3769
3770 /* set FSF related fields in QTCB */
3771 fsf_req->qtcb->header.lun_handle = unit->handle;
3772 fsf_req->qtcb->header.port_handle = unit->port->handle;
3773 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
06506d00 3774 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 3775 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3776 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3777
3778 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3779 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3780 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3781
3782 /* set FCP related fields in FCP_CMND IU in QTCB */
3783 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3784 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3785 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3786 fcp_cmnd_iu->task_management_flags = tm_flags;
3787
2abbe866
AH		 3788 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
3789 retval = zfcp_fsf_req_send(fsf_req);
fdf23452 3790 if (!retval)
1da177e4 3791 goto out;
1da177e4 3792
fdf23452
CS		 3793 unit_blocked:
3794 zfcp_fsf_req_free(fsf_req);
3795 fsf_req = NULL;
3796
1da177e4
LT		 3797 out:
3798 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3799 return fsf_req;
3800}
3801
3802/*
3803 * function: zfcp_fsf_send_fcp_command_handler
3804 *
3805 * purpose: is called for finished Send FCP Command
3806 *
41fa2ada 3807 * returns:
1da177e4
LT		 3808 */
3809static int
3810zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3811{
3812 int retval = -EINVAL;
3813 struct zfcp_unit *unit;
3814 struct fsf_qtcb_header *header;
3815 u16 subtable, rule, counter;
3816
3817 header = &fsf_req->qtcb->header;
3818
3819 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
059c97d0 3820 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 3821 else
059c97d0 3822 unit = fsf_req->unit;
1da177e4
LT		 3823
3824 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3825 /* go directly to calls of special handlers */
3826 goto skip_fsfstatus;
3827 }
3828
3829 /* evaluate FSF status in QTCB */
3830 switch (header->fsf_status) {
3831
3832 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3833 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3834 "0x%016Lx on adapter %s invalid\n",
3835 unit->port->handle,
3836 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3837 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3838 (char *) &header->fsf_status_qual,
3839 sizeof (union fsf_status_qual));
3840 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3841 "fsf_s_phand_nv");
3842 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3843 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3844 break;
3845
3846 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3847 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3848 "0x%016Lx on port 0x%016Lx on adapter %s is "
3849 "invalid. This may happen occasionally.\n",
3850 unit->handle,
3851 unit->fcp_lun,
3852 unit->port->wwpn,
3853 zfcp_get_busid_by_unit(unit));
3854 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3855 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3856 (char *) &header->fsf_status_qual,
3857 sizeof (union fsf_status_qual));
3858 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3859 "fsf_s_uhand_nv");
3860 zfcp_erp_port_reopen(unit->port, 0);
3861 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3862 break;
3863
3864 case FSF_HANDLE_MISMATCH:
1da177e4
LT		 3865 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3866 "unexpectedly. (adapter %s, port 0x%016Lx, "
3867 "unit 0x%016Lx)\n",
3868 unit->port->handle,
3869 zfcp_get_busid_by_unit(unit),
3870 unit->port->wwpn,
3871 unit->fcp_lun);
3872 ZFCP_LOG_NORMAL("status qualifier:\n");
3873 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3874 (char *) &header->fsf_status_qual,
3875 sizeof (union fsf_status_qual));
3876 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3877 "fsf_s_hand_mis");
3878 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1da177e4
LT		 3879 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3880 break;
3881
3882 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 3883 ZFCP_LOG_INFO("error: adapter %s does not support fc "
3884 "class %d.\n",
3885 zfcp_get_busid_by_unit(unit),
3886 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4
LT		 3887 /* stop operation for this adapter */
3888 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3889 "fsf_s_class_nsup");
3890 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3891 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3892 break;
3893
3894 case FSF_FCPLUN_NOT_VALID:
1da177e4
LT		 3895 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3896 "adapter %s does not have correct unit "
3897 "handle 0x%x\n",
3898 unit->fcp_lun,
3899 unit->port->wwpn,
3900 zfcp_get_busid_by_unit(unit),
3901 unit->handle);
3902 ZFCP_LOG_DEBUG("status qualifier:\n");
3903 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3904 (char *) &header->fsf_status_qual,
3905 sizeof (union fsf_status_qual));
3906 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3907 "fsf_s_fcp_lun_nv");
3908 zfcp_erp_port_reopen(unit->port, 0);
1da177e4
LT		 3909 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3910 break;
3911
3912 case FSF_ACCESS_DENIED:
1da177e4
LT		 3913 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3914 "unit 0x%016Lx on port 0x%016Lx on "
3915 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3916 zfcp_get_busid_by_unit(unit));
3917 for (counter = 0; counter < 2; counter++) {
3918 subtable = header->fsf_status_qual.halfword[counter * 2];
3919 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3920 switch (subtable) {
3921 case FSF_SQ_CFDC_SUBTABLE_OS:
3922 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3923 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3924 case FSF_SQ_CFDC_SUBTABLE_LUN:
3925 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3926 zfcp_act_subtable_type[subtable], rule);
3927 break;
3928 }
3929 }
3930 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3931 zfcp_erp_unit_access_denied(unit);
3932 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3933 break;
3934
3935 case FSF_DIRECTION_INDICATOR_NOT_VALID:
1da177e4
LT		 3936 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3937 "0x%016Lx on port 0x%016Lx on adapter %s "
3938 "(debug info %d)\n",
3939 unit->fcp_lun,
3940 unit->port->wwpn,
3941 zfcp_get_busid_by_unit(unit),
3942 fsf_req->qtcb->bottom.io.data_direction);
3943 /* stop operation for this adapter */
3944 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3945 "fsf_s_dir_ind_nv");
3946 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3947 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3948 break;
3949
3950 case FSF_CMND_LENGTH_NOT_VALID:
1da177e4
LT		 3951 ZFCP_LOG_NORMAL
3952 ("bug: An invalid control-data-block length field "
3953 "was found in a command for unit 0x%016Lx on port "
3954 "0x%016Lx on adapter %s " "(debug info %d)\n",
3955 unit->fcp_lun, unit->port->wwpn,
3956 zfcp_get_busid_by_unit(unit),
3957 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3958 /* stop operation for this adapter */
3959 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3960 "fsf_s_cmd_len_nv");
3961 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
1da177e4
LT		 3962 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3963 break;
3964
3965 case FSF_PORT_BOXED:
1da177e4
LT		 3966 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3967 "needs to be reopened\n",
3968 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3969 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
d736a27b 3970 zfcp_erp_port_boxed(unit->port);
1da177e4
LT		 3971 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3972 ZFCP_STATUS_FSFREQ_RETRY;
3973 break;
3974
3975 case FSF_LUN_BOXED:
1da177e4
LT		 3976 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3977 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3978 zfcp_get_busid_by_unit(unit),
3979 unit->port->wwpn, unit->fcp_lun);
3980 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
d736a27b 3981 zfcp_erp_unit_boxed(unit);
1da177e4
LT		 3982 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3983 | ZFCP_STATUS_FSFREQ_RETRY;
3984 break;
3985
3986 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3987 switch (header->fsf_status_qual.word[0]) {
3988 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 3989 /* re-establish link to port */
3990 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3991 "fsf_sq_ltest");
65a8d4e1 3992 zfcp_test_link(unit->port);
1da177e4
LT		 3993 break;
3994 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3995 /* FIXME(hw) need proper specs for proper action */
3996 /* let scsi stack deal with retries and escalation */
3997 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3998 "fsf_sq_ulp");
1da177e4
LT		 3999 break;
4000 default:
1da177e4 4001 ZFCP_LOG_NORMAL
516a4201 4002 ("Unknown status qualifier 0x%x arrived.\n",
1da177e4
LT		 4003 header->fsf_status_qual.word[0]);
4004 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4005 "fsf_sq_inval:");
4006 debug_exception(fsf_req->adapter->erp_dbf, 0,
4007 &header->fsf_status_qual.word[0],
4008 sizeof(u32));
4009 break;
4010 }
516a4201 4011 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 4012 break;
4013
4014 case FSF_GOOD:
1da177e4
LT		 4015 break;
4016
4017 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 4018 break;
4019
4020 default:
4021 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
4022 debug_exception(fsf_req->adapter->erp_dbf, 0,
4023 &header->fsf_status, sizeof(u32));
4024 break;
4025 }
4026
4027 skip_fsfstatus:
4028 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
4029 retval =
4030 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
4031 } else {
4032 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
059c97d0
AH		 4033 fsf_req->unit = NULL;
4034 zfcp_unit_put(unit);
1da177e4
LT		 4035 }
4036 return retval;
4037}
4038
4039/*
4040 * function: zfcp_fsf_send_fcp_command_task_handler
4041 *
4042 * purpose: evaluates FCP_RSP IU
4043 *
41fa2ada 4044 * returns:
1da177e4
LT		 4045 */
4046static int
4047zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
4048{
4049 int retval = 0;
4050 struct scsi_cmnd *scpnt;
4051 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4052 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4053 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
4054 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
4055 u32 sns_len;
4056 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4057 unsigned long flags;
059c97d0 4058 struct zfcp_unit *unit = fsf_req->unit;
1da177e4
LT		 4059
4060 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
059c97d0 4061 scpnt = (struct scsi_cmnd *) fsf_req->data;
1da177e4
LT		 4062 if (unlikely(!scpnt)) {
4063 ZFCP_LOG_DEBUG
4064 ("Command with fsf_req %p is not associated to "
4065 "a scsi command anymore. Aborted?\n", fsf_req);
4066 goto out;
4067 }
4068 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4069 /* FIXME: (design) mid-layer should handle DID_ABORT like
4070 * DID_SOFT_ERROR by retrying the request for devices
4071 * that allow retries.
4072 */
4073 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4074 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4075 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4076 goto skip_fsfstatus;
4077 }
4078
4079 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4080 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4081 set_host_byte(&scpnt->result, DID_ERROR);
4082 goto skip_fsfstatus;
4083 }
4084
4085 /* set message byte of result in SCSI command */
4086 scpnt->result |= COMMAND_COMPLETE << 8;
4087
4088 /*
4089 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4090 * of result in SCSI command
4091 */
4092 scpnt->result |= fcp_rsp_iu->scsi_status;
4093 if (unlikely(fcp_rsp_iu->scsi_status)) {
4094 /* DEBUG */
4095 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4096 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4097 scpnt->cmnd, scpnt->cmd_len);
4098 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4099 fcp_rsp_iu->scsi_status);
4100 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4101 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4102 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4103 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4104 fcp_rsp_iu->fcp_sns_len);
4105 }
4106
4107 /* check FCP_RSP_INFO */
4108 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4109 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4110 switch (fcp_rsp_info[3]) {
4111 case RSP_CODE_GOOD:
1da177e4
LT		 4112 /* ok, continue */
4113 ZFCP_LOG_TRACE("no failure or Task Management "
4114 "Function complete\n");
4115 set_host_byte(&scpnt->result, DID_OK);
4116 break;
4117 case RSP_CODE_LENGTH_MISMATCH:
1da177e4
LT		 4118 /* hardware bug */
4119 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4120 "that the fibrechannel protocol data "
4121 "length differs from the burst length. "
4122 "The problem occured on unit 0x%016Lx "
4123 "on port 0x%016Lx on adapter %s",
4124 unit->fcp_lun,
4125 unit->port->wwpn,
4126 zfcp_get_busid_by_unit(unit));
4127 /* dump SCSI CDB as prepared by zfcp */
4128 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4129 (char *) &fsf_req->qtcb->
4130 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 4131 set_host_byte(&scpnt->result, DID_ERROR);
4132 goto skip_fsfstatus;
4133 case RSP_CODE_FIELD_INVALID:
1da177e4
LT		 4134 /* driver or hardware bug */
4135 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4136 "that the fibrechannel protocol data "
4137 "fields were incorrectly set up. "
4138 "The problem occured on the unit "
4139 "0x%016Lx on port 0x%016Lx on "
4140 "adapter %s",
4141 unit->fcp_lun,
4142 unit->port->wwpn,
4143 zfcp_get_busid_by_unit(unit));
4144 /* dump SCSI CDB as prepared by zfcp */
4145 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4146 (char *) &fsf_req->qtcb->
4147 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4148 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4149 goto skip_fsfstatus;
4150 case RSP_CODE_RO_MISMATCH:
1da177e4
LT		 4151 /* hardware bug */
4152 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4153 "that conflicting values for the "
4154 "fibrechannel payload offset from the "
4155 "header were found. "
4156 "The problem occured on unit 0x%016Lx "
4157 "on port 0x%016Lx on adapter %s.\n",
4158 unit->fcp_lun,
4159 unit->port->wwpn,
4160 zfcp_get_busid_by_unit(unit));
4161 /* dump SCSI CDB as prepared by zfcp */
4162 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4163 (char *) &fsf_req->qtcb->
4164 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 4165 set_host_byte(&scpnt->result, DID_ERROR);
4166 goto skip_fsfstatus;
4167 default:
4168 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4169 "code was detected for a command. "
4170 "The problem occured on the unit "
4171 "0x%016Lx on port 0x%016Lx on "
4172 "adapter %s (debug info 0x%x)\n",
4173 unit->fcp_lun,
4174 unit->port->wwpn,
4175 zfcp_get_busid_by_unit(unit),
4176 fcp_rsp_info[3]);
4177 /* dump SCSI CDB as prepared by zfcp */
4178 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4179 (char *) &fsf_req->qtcb->
4180 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4 4181 set_host_byte(&scpnt->result, DID_ERROR);
6f71d9bc 4182 goto skip_fsfstatus;
1da177e4
LT		 4183 }
4184 }
4185
4186 /* check for sense data */
4187 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4188 sns_len = FSF_FCP_RSP_SIZE -
4189 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4190 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4191 sns_len);
4192 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4193 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4194 SCSI_SENSE_BUFFERSIZE);
4195 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4196 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4197 scpnt->result);
4198 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4199 (void *) &scpnt->cmnd, scpnt->cmd_len);
4200
4201 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4202 fcp_rsp_iu->fcp_sns_len);
9d058ecf 4203 memcpy(scpnt->sense_buffer,
1da177e4
LT		 4204 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4205 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
9d058ecf 4206 (void *)scpnt->sense_buffer, sns_len);
1da177e4
LT		 4207 }
4208
4209 /* check for overrun */
4210 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4211 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4212 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4213 "The response data length is "
4214 "%d, the original length was %d.\n",
4215 unit->fcp_lun,
4216 unit->port->wwpn,
4217 zfcp_get_busid_by_unit(unit),
4218 fcp_rsp_iu->fcp_resid,
4219 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4220 }
4221
4222 /* check for underrun */
4223 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4224 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4225 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4226 "The response data length is "
4227 "%d, the original length was %d.\n",
4228 unit->fcp_lun,
4229 unit->port->wwpn,
4230 zfcp_get_busid_by_unit(unit),
4231 fcp_rsp_iu->fcp_resid,
4232 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4233
7936a892
FT		 4234 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
4235 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
4236 scpnt->underflow)
6f71d9bc 4237 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4238 }
4239
4240 skip_fsfstatus:
4241 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4242
8a36e453 4243 if (scpnt->result != 0)
ed829ad6 4244 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
8a36e453 4245 else if (scpnt->retries > 0)
ed829ad6 4246 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
8a36e453 4247 else
ed829ad6 4248 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
1da177e4
LT		 4249
4250 /* cleanup pointer (need this especially for abort) */
4251 scpnt->host_scribble = NULL;
4252
1da177e4 4253 /* always call back */
1da177e4
LT		 4254 (scpnt->scsi_done) (scpnt);
4255
4256 /*
4257 * We must hold this lock until scsi_done has been called.
4258 * Otherwise we may call scsi_done after abort regarding this
4259 * command has completed.
4260 * Note: scsi_done must not block!
4261 */
4262 out:
4263 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4264 return retval;
4265}
4266
4267/*
4268 * function: zfcp_fsf_send_fcp_command_task_management_handler
4269 *
4270 * purpose: evaluates FCP_RSP IU
4271 *
41fa2ada 4272 * returns:
1da177e4
LT		 4273 */
4274static int
4275zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4276{
4277 int retval = 0;
4278 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4279 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4280 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
059c97d0 4281 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 4282
1da177e4
LT		 4283 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4284 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4285 goto skip_fsfstatus;
4286 }
4287
4288 /* check FCP_RSP_INFO */
4289 switch (fcp_rsp_info[3]) {
4290 case RSP_CODE_GOOD:
1da177e4
LT		 4291 /* ok, continue */
4292 ZFCP_LOG_DEBUG("no failure or Task Management "
4293 "Function complete\n");
4294 break;
4295 case RSP_CODE_TASKMAN_UNSUPP:
1da177e4
LT		 4296 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4297 "is not supported on the target device "
4298 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4299 unit->fcp_lun,
4300 unit->port->wwpn,
4301 zfcp_get_busid_by_unit(unit));
4302 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4303 break;
4304 case RSP_CODE_TASKMAN_FAILED:
1da177e4
LT		 4305 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4306 "failed to complete successfully. "
4307 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4308 unit->fcp_lun,
4309 unit->port->wwpn,
4310 zfcp_get_busid_by_unit(unit));
4311 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4312 break;
4313 default:
4314 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4315 "code was detected for a command. "
4316 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4317 "(debug info 0x%x)\n",
4318 unit->fcp_lun,
4319 unit->port->wwpn,
4320 zfcp_get_busid_by_unit(unit),
4321 fcp_rsp_info[3]);
4322 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4323 }
4324
4325 skip_fsfstatus:
4326 return retval;
4327}
4328
4329
4330/*
4331 * function: zfcp_fsf_control_file
4332 *
4333 * purpose: Initiator of the control file upload/download FSF requests
4334 *
4335 * returns: 0 - FSF request is successfuly created and queued
4336 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4337 * -EINVAL - Invalid direction specified
4338 * -ENOMEM - Insufficient memory
4339 * -EPERM - Cannot create FSF request or place it in QDIO queue
4340 */
4341int
4342zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4343 struct zfcp_fsf_req **fsf_req_ptr,
4344 u32 fsf_command,
4345 u32 option,
4346 struct zfcp_sg_list *sg_list)
4347{
4348 struct zfcp_fsf_req *fsf_req;
4349 struct fsf_qtcb_bottom_support *bottom;
4350 volatile struct qdio_buffer_element *sbale;
1da177e4
LT		 4351 unsigned long lock_flags;
4352 int req_flags = 0;
4353 int direction;
4354 int retval = 0;
4355
aef4a983 4356 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
1da177e4
LT		 4357 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4358 zfcp_get_busid_by_adapter(adapter));
4359 retval = -EOPNOTSUPP;
4360 goto out;
4361 }
4362
4363 switch (fsf_command) {
4364
4365 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4366 direction = SBAL_FLAGS0_TYPE_WRITE;
4367 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4368 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4369 req_flags = ZFCP_WAIT_FOR_SBAL;
4370 break;
4371
4372 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4373 direction = SBAL_FLAGS0_TYPE_READ;
4374 break;
4375
4376 default:
4377 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4378 retval = -EINVAL;
4379 goto out;
4380 }
4381
1da177e4
LT		 4382 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4383 NULL, &lock_flags, &fsf_req);
4384 if (retval < 0) {
4385 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4386 "adapter %s\n",
4387 zfcp_get_busid_by_adapter(adapter));
4388 retval = -EPERM;
4389 goto unlock_queue_lock;
4390 }
4391
4392 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4393 sbale[0].flags |= direction;
4394
4395 bottom = &fsf_req->qtcb->bottom.support;
4396 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4397 bottom->option = option;
4398
4399 if (sg_list->count > 0) {
4400 int bytes;
4401
4402 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4403 sg_list->sg, sg_list->count,
4404 ZFCP_MAX_SBALS_PER_REQ);
4405 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4406 ZFCP_LOG_INFO(
4407 "error: Could not create sufficient number of "
4408 "SBALS for an FSF request to the adapter %s\n",
4409 zfcp_get_busid_by_adapter(adapter));
4410 retval = -ENOMEM;
4411 goto free_fsf_req;
4412 }
4413 } else
4414 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4415
2abbe866
AH		 4416 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
4417 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 4418 if (retval < 0) {
4419 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4420 "(adapter %s)\n",
4421 zfcp_get_busid_by_adapter(adapter));
4422 retval = -EPERM;
4423 goto free_fsf_req;
4424 }
4425 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4426
4427 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4428 "adapter %s\n",
4429 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4430 "download" : "upload",
4431 zfcp_get_busid_by_adapter(adapter));
4432
4433 wait_event(fsf_req->completion_wq,
4434 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4435
4436 *fsf_req_ptr = fsf_req;
2abbe866 4437 goto out;
1da177e4
LT		 4438
4439 free_fsf_req:
4440 zfcp_fsf_req_free(fsf_req);
4441 unlock_queue_lock:
4442 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1da177e4
LT		 4443 out:
4444 return retval;
4445}
4446
4447
4448/*
4449 * function: zfcp_fsf_control_file_handler
4450 *
4451 * purpose: Handler of the control file upload/download FSF requests
4452 *
4453 * returns: 0 - FSF request successfuly processed
4454 * -EAGAIN - Operation has to be repeated because of a temporary problem
4455 * -EACCES - There is no permission to execute an operation
4456 * -EPERM - The control file is not in a right format
4457 * -EIO - There is a problem with the FCP adapter
4458 * -EINVAL - Invalid operation
4459 * -EFAULT - User space memory I/O operation fault
4460 */
4461static int
4462zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4463{
4464 struct zfcp_adapter *adapter = fsf_req->adapter;
4465 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4466 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4467 int retval = 0;
4468
4469 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4470 retval = -EINVAL;
4471 goto skip_fsfstatus;
4472 }
4473
4474 switch (header->fsf_status) {
4475
4476 case FSF_GOOD:
1da177e4
LT		 4477 ZFCP_LOG_NORMAL(
4478 "The FSF request has been successfully completed "
4479 "on the adapter %s\n",
4480 zfcp_get_busid_by_adapter(adapter));
4481 break;
4482
4483 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
1da177e4
LT		 4484 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4485 switch (header->fsf_status_qual.word[0]) {
4486
6f71d9bc 4487 case FSF_SQ_CFDC_HARDENED_ON_SE:
4488 ZFCP_LOG_NORMAL(
4489 "CFDC on the adapter %s has being "
4490 "hardened on primary and secondary SE\n",
4491 zfcp_get_busid_by_adapter(adapter));
4492 break;
4493
1da177e4
LT		 4494 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4495 ZFCP_LOG_NORMAL(
4496 "CFDC of the adapter %s could not "
4497 "be saved on the SE\n",
4498 zfcp_get_busid_by_adapter(adapter));
4499 break;
4500
4501 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4502 ZFCP_LOG_NORMAL(
4503 "CFDC of the adapter %s could not "
4504 "be copied to the secondary SE\n",
4505 zfcp_get_busid_by_adapter(adapter));
4506 break;
4507
4508 default:
4509 ZFCP_LOG_NORMAL(
4510 "CFDC could not be hardened "
4511 "on the adapter %s\n",
4512 zfcp_get_busid_by_adapter(adapter));
4513 }
4514 }
4515 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4516 retval = -EAGAIN;
4517 break;
4518
4519 case FSF_AUTHORIZATION_FAILURE:
1da177e4
LT		 4520 ZFCP_LOG_NORMAL(
4521 "Adapter %s does not accept privileged commands\n",
4522 zfcp_get_busid_by_adapter(adapter));
4523 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4524 retval = -EACCES;
4525 break;
4526
4527 case FSF_CFDC_ERROR_DETECTED:
1da177e4
LT		 4528 ZFCP_LOG_NORMAL(
4529 "Error at position %d in the CFDC, "
4530 "CFDC is discarded by the adapter %s\n",
4531 header->fsf_status_qual.word[0],
4532 zfcp_get_busid_by_adapter(adapter));
4533 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4534 retval = -EPERM;
4535 break;
4536
4537 case FSF_CONTROL_FILE_UPDATE_ERROR:
1da177e4
LT		 4538 ZFCP_LOG_NORMAL(
4539 "Adapter %s cannot harden the control file, "
4540 "file is discarded\n",
4541 zfcp_get_busid_by_adapter(adapter));
4542 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4543 retval = -EIO;
4544 break;
4545
4546 case FSF_CONTROL_FILE_TOO_LARGE:
1da177e4
LT		 4547 ZFCP_LOG_NORMAL(
4548 "Control file is too large, file is discarded "
4549 "by the adapter %s\n",
4550 zfcp_get_busid_by_adapter(adapter));
4551 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4552 retval = -EIO;
4553 break;
4554
4555 case FSF_ACCESS_CONFLICT_DETECTED:
1da177e4
LT		 4556 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4557 ZFCP_LOG_NORMAL(
4558 "CFDC has been discarded by the adapter %s, "
4559 "because activation would impact "
4560 "%d active connection(s)\n",
4561 zfcp_get_busid_by_adapter(adapter),
4562 header->fsf_status_qual.word[0]);
4563 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4564 retval = -EIO;
4565 break;
4566
4567 case FSF_CONFLICTS_OVERRULED:
1da177e4
LT		 4568 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4569 ZFCP_LOG_NORMAL(
4570 "CFDC has been activated on the adapter %s, "
4571 "but activation has impacted "
4572 "%d active connection(s)\n",
4573 zfcp_get_busid_by_adapter(adapter),
4574 header->fsf_status_qual.word[0]);
4575 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4576 retval = -EIO;
4577 break;
4578
4579 case FSF_UNKNOWN_OP_SUBTYPE:
1da177e4
LT		 4580 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4581 "op_subtype=0x%x)\n",
4582 zfcp_get_busid_by_adapter(adapter),
4583 bottom->operation_subtype);
4584 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4585 retval = -EINVAL;
4586 break;
4587
4588 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 4589 ZFCP_LOG_NORMAL(
4590 "Invalid option 0x%x has been specified "
4591 "in QTCB bottom sent to the adapter %s\n",
4592 bottom->option,
4593 zfcp_get_busid_by_adapter(adapter));
4594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4595 retval = -EINVAL;
4596 break;
4597
4598 default:
4599 ZFCP_LOG_NORMAL(
4600 "bug: An unknown/unexpected FSF status 0x%08x "
4601 "was presented on the adapter %s\n",
4602 header->fsf_status,
4603 zfcp_get_busid_by_adapter(adapter));
4604 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4605 debug_exception(fsf_req->adapter->erp_dbf, 0,
4606 &header->fsf_status_qual.word[0], sizeof(u32));
4607 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4608 retval = -EINVAL;
4609 break;
4610 }
4611
4612skip_fsfstatus:
4613 return retval;
4614}
4615
1da177e4
LT		 4616static inline int
4617zfcp_fsf_req_sbal_check(unsigned long *flags,
4618 struct zfcp_qdio_queue *queue, int needed)
4619{
4620 write_lock_irqsave(&queue->queue_lock, *flags);
4621 if (likely(atomic_read(&queue->free_count) >= needed))
4622 return 1;
4623 write_unlock_irqrestore(&queue->queue_lock, *flags);
4624 return 0;
4625}
4626
4627/*
4628 * set qtcb pointer in fsf_req and initialize QTCB
4629 */
4d284cac 4630static void
8a36e453 4631zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 4632{
4633 if (likely(fsf_req->qtcb != NULL)) {
fea9d6c7
VS		 4634 fsf_req->qtcb->prefix.req_seq_no =
4635 fsf_req->adapter->fsf_req_seq_no;
4636 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
1da177e4 4637 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
fea9d6c7
VS		 4638 fsf_req->qtcb->prefix.qtcb_type =
4639 fsf_qtcb_type[fsf_req->fsf_command];
1da177e4 4640 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
fea9d6c7 4641 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
8a36e453 4642 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
1da177e4
LT		 4643 }
4644}
4645
4646/**
4647 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4648 * @adapter: adapter for which request queue is examined
4649 * @req_flags: flags indicating whether to wait for needed SBAL or not
4650 * @lock_flags: lock_flags if queue_lock is taken
4651 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4652 * Locks: lock adapter->request_queue->queue_lock on success
4653 */
4654static int
4655zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4656 unsigned long *lock_flags)
4657{
4658 long ret;
4659 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4660
4661 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4662 ret = wait_event_interruptible_timeout(adapter->request_wq,
4663 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4664 ZFCP_SBAL_TIMEOUT);
4665 if (ret < 0)
4666 return ret;
4667 if (!ret)
4668 return -EIO;
4669 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4670 return -EIO;
4671
4672 return 0;
4673}
4674
4675/*
4676 * function: zfcp_fsf_req_create
4677 *
4678 * purpose: create an FSF request at the specified adapter and
4679 * setup common fields
4680 *
4681 * returns: -ENOMEM if there was insufficient memory for a request
4682 * -EIO if no qdio buffers could be allocate to the request
4683 * -EINVAL/-EPERM on bug conditions in req_dequeue
4684 * 0 in success
4685 *
4686 * note: The created request is returned by reference.
4687 *
4688 * locks: lock of concerned request queue must not be held,
4689 * but is held on completion (write, irqsave)
4690 */
4691int
4692zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4693 mempool_t *pool, unsigned long *lock_flags,
4694 struct zfcp_fsf_req **fsf_req_p)
4695{
4696 volatile struct qdio_buffer_element *sbale;
4697 struct zfcp_fsf_req *fsf_req = NULL;
4698 int ret = 0;
4699 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4700
4701 /* allocate new FSF request */
4702 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4703 if (unlikely(NULL == fsf_req)) {
ceb3dfba 4704 ZFCP_LOG_DEBUG("error: Could not put an FSF request into "
1da177e4
LT		 4705 "the outbound (send) queue.\n");
4706 ret = -ENOMEM;
4707 goto failed_fsf_req;
4708 }
4709
8a36e453
MS		 4710 fsf_req->adapter = adapter;
4711 fsf_req->fsf_command = fsf_cmd;
fea9d6c7 4712 INIT_LIST_HEAD(&fsf_req->list);
2abbe866 4713 init_timer(&fsf_req->timer);
1da177e4 4714
41fa2ada 4715 /* initialize waitqueue which may be used to wait on
1da177e4
LT		 4716 this request completion */
4717 init_waitqueue_head(&fsf_req->completion_wq);
4718
4719 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
801e0ced 4720 if (ret < 0)
1da177e4 4721 goto failed_sbals;
801e0ced
CS		 4722
4723 /* this is serialized (we are holding req_queue-lock of adapter) */
4724 if (adapter->req_no == 0)
4725 adapter->req_no++;
4726 fsf_req->req_id = adapter->req_no++;
4727
4728 zfcp_fsf_req_qtcb_init(fsf_req);
1da177e4
LT		 4729
4730 /*
4731 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4732 * if it is not set (see also *_open_qdio and *_close_qdio).
4733 */
4734
4735 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4736 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4737 ret = -EIO;
4738 goto failed_sbals;
4739 }
4740
8a36e453
MS		 4741 if (fsf_req->qtcb) {
4742 fsf_req->seq_no = adapter->fsf_req_seq_no;
4743 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4744 }
1da177e4
LT		 4745 fsf_req->sbal_number = 1;
4746 fsf_req->sbal_first = req_queue->free_index;
4747 fsf_req->sbal_curr = req_queue->free_index;
4748 fsf_req->sbale_curr = 1;
4749
4750 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4751 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4752 }
4753
4754 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4755
4756 /* setup common SBALE fields */
fea9d6c7 4757 sbale[0].addr = (void *) fsf_req->req_id;
1da177e4
LT		 4758 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4759 if (likely(fsf_req->qtcb != NULL)) {
4760 sbale[1].addr = (void *) fsf_req->qtcb;
4761 sbale[1].length = sizeof(struct fsf_qtcb);
4762 }
4763
4764 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4765 fsf_req->sbal_number, fsf_req->sbal_first);
4766
4767 goto success;
4768
4769 failed_sbals:
4770/* dequeue new FSF request previously enqueued */
4771 zfcp_fsf_req_free(fsf_req);
4772 fsf_req = NULL;
4773
4774 failed_fsf_req:
4775 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4776 success:
4777 *fsf_req_p = fsf_req;
4778 return ret;
4779}
4780
4781/*
4782 * function: zfcp_fsf_req_send
4783 *
4784 * purpose: start transfer of FSF request via QDIO
4785 *
4786 * returns: 0 - request transfer succesfully started
4787 * !0 - start of request transfer failed
4788 */
2abbe866 4789static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 4790{
4791 struct zfcp_adapter *adapter;
4792 struct zfcp_qdio_queue *req_queue;
4793 volatile struct qdio_buffer_element *sbale;
8a36e453 4794 int inc_seq_no;
1da177e4 4795 int new_distance_from_int;
fea9d6c7 4796 u64 dbg_tmp[2];
1da177e4
LT		 4797 int retval = 0;
4798
4799 adapter = fsf_req->adapter;
4800 req_queue = &adapter->request_queue,
4801
4802
4803 /* FIXME(debug): remove it later */
4804 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4805 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4806 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4807 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4808 sbale[1].length);
4809
fea9d6c7
VS		 4810 /* put allocated FSF request into hash table */
4811 spin_lock(&adapter->req_list_lock);
4812 zfcp_reqlist_add(adapter, fsf_req);
4813 spin_unlock(&adapter->req_list_lock);
1da177e4 4814
8a36e453
MS		 4815 inc_seq_no = (fsf_req->qtcb != NULL);
4816
1da177e4
LT		 4817 ZFCP_LOG_TRACE("request queue of adapter %s: "
4818 "next free SBAL is %i, %i free SBALs\n",
4819 zfcp_get_busid_by_adapter(adapter),
4820 req_queue->free_index,
4821 atomic_read(&req_queue->free_count));
4822
4823 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4824 "index_in_queue=%i, count=%i, buffers=%p\n",
4825 zfcp_get_busid_by_adapter(adapter),
4826 QDIO_FLAG_SYNC_OUTPUT,
4827 0, fsf_req->sbal_first, fsf_req->sbal_number,
4828 &req_queue->buffer[fsf_req->sbal_first]);
4829
4830 /*
4831 * adjust the number of free SBALs in request queue as well as
4832 * position of first one
4833 */
4834 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4835 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4836 req_queue->free_index += fsf_req->sbal_number; /* increase */
4837 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4838 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4839
8a36e453
MS		 4840 fsf_req->issued = get_clock();
4841
1da177e4
LT		 4842 retval = do_QDIO(adapter->ccw_device,
4843 QDIO_FLAG_SYNC_OUTPUT,
4844 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4845
fea9d6c7
VS		 4846 dbg_tmp[0] = (unsigned long) sbale[0].addr;
4847 dbg_tmp[1] = (u64) retval;
4848 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
4849
1da177e4
LT		 4850 if (unlikely(retval)) {
4851 /* Queues are down..... */
4852 retval = -EIO;
2abbe866 4853 del_timer(&fsf_req->timer);
fea9d6c7 4854 spin_lock(&adapter->req_list_lock);
ca2d02c2 4855 zfcp_reqlist_remove(adapter, fsf_req);
fea9d6c7
VS		 4856 spin_unlock(&adapter->req_list_lock);
4857 /* undo changes in request queue made for this request */
1da177e4
LT		 4858 zfcp_qdio_zero_sbals(req_queue->buffer,
4859 fsf_req->sbal_first, fsf_req->sbal_number);
4860 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
fea9d6c7 4861 req_queue->free_index -= fsf_req->sbal_number;
1da177e4
LT		 4862 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4863 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
fea9d6c7 4864 zfcp_erp_adapter_reopen(adapter, 0);
1da177e4
LT		 4865 } else {
4866 req_queue->distance_from_int = new_distance_from_int;
4867 /*
4868 * increase FSF sequence counter -
4869 * this must only be done for request successfully enqueued to
4870 * QDIO this rejected requests may be cleaned up by calling
4871 * routines resulting in missing sequence counter values
4872 * otherwise,
4873 */
8a36e453 4874
1da177e4 4875 /* Don't increase for unsolicited status */
8a36e453 4876 if (inc_seq_no)
1da177e4 4877 adapter->fsf_req_seq_no++;
8a36e453 4878
1da177e4 4879 /* count FSF requests pending */
fea9d6c7 4880 atomic_inc(&adapter->reqs_active);
1da177e4
LT		 4881 }
4882 return retval;
4883}
4884
1da177e4 4885#undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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