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[SCSI] zfcp: Move CFDC code to new file.
[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 *);
45633fdc 39static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
1da177e4
LT		 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 *);
698ec016 49static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
aef4a983 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);
1f6f7129 301 zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
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);
1f6f7129 312 zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
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));
1f6f7129 323 zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
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));
1f6f7129 340 zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
1da177e4
LT		 341 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
342 break;
343
344 case FSF_PROT_LINK_DOWN:
698ec016 345 zfcp_fsf_link_down_info_eval(fsf_req, 37,
aef4a983 346 &prot_status_qual->link_down_info);
9467a9b3 347 /* FIXME: reopening adapter now? better wait for link up */
1f6f7129 348 zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
1da177e4
LT		 349 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
350 break;
351
352 case FSF_PROT_REEST_QUEUE:
8a36e453 353 ZFCP_LOG_NORMAL("The local link to adapter with "
1da177e4
LT		 354 "%s was re-plugged. "
355 "Re-starting operations on this adapter.\n",
356 zfcp_get_busid_by_adapter(adapter));
357 /* All ports should be marked as ready to run again */
1f6f7129
MP		 358 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
359 ZFCP_STATUS_COMMON_RUNNING,
1da177e4
LT		 360 ZFCP_SET);
361 zfcp_erp_adapter_reopen(adapter,
362 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
9467a9b3 363 | ZFCP_STATUS_COMMON_ERP_FAILED,
1f6f7129 364 99, fsf_req);
1da177e4
LT		 365 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
366 break;
367
368 case FSF_PROT_ERROR_STATE:
1da177e4
LT		 369 ZFCP_LOG_NORMAL("error: The adapter %s "
370 "has entered the error state. "
371 "Restarting all operations on this "
372 "adapter.\n",
373 zfcp_get_busid_by_adapter(adapter));
1f6f7129 374 zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
1da177e4
LT		 375 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
376 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
377 break;
378
379 default:
380 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
381 "provided by the adapter %s "
382 "is not compatible with the device driver. "
383 "Stopping all operations on this adapter. "
384 "(debug info 0x%x).\n",
385 zfcp_get_busid_by_adapter(adapter),
8a36e453 386 qtcb->prefix.prot_status);
1f6f7129 387 zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
1da177e4
LT		 388 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
389 }
390
391 skip_protstatus:
392 /*
393 * always call specific handlers to give them a chance to do
394 * something meaningful even in error cases
395 */
396 zfcp_fsf_fsfstatus_eval(fsf_req);
397 return retval;
398}
399
400/*
401 * function: zfcp_fsf_fsfstatus_eval
402 *
403 * purpose: evaluates FSF status of completed FSF request
404 * and acts accordingly
405 *
406 * returns:
407 */
408static int
409zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
410{
411 int retval = 0;
412
413 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
414 goto skip_fsfstatus;
415 }
416
417 /* evaluate FSF Status */
418 switch (fsf_req->qtcb->header.fsf_status) {
419 case FSF_UNKNOWN_COMMAND:
1da177e4
LT		 420 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
421 "not known by the adapter %s "
422 "Stopping all operations on this adapter. "
423 "(debug info 0x%x).\n",
424 zfcp_get_busid_by_adapter(fsf_req->adapter),
425 fsf_req->qtcb->header.fsf_command);
1f6f7129 426 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
1da177e4
LT		 427 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
428 break;
429
430 case FSF_FCP_RSP_AVAILABLE:
1da177e4
LT		 431 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
432 "SCSI stack.\n");
1da177e4
LT		 433 break;
434
435 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 436 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
437 break;
1da177e4
LT		 438 }
439
440 skip_fsfstatus:
441 /*
442 * always call specific handlers to give them a chance to do
443 * something meaningful even in error cases
444 */
445 zfcp_fsf_req_dispatch(fsf_req);
446
447 return retval;
448}
449
450/*
451 * function: zfcp_fsf_fsfstatus_qual_eval
452 *
453 * purpose: evaluates FSF status-qualifier of completed FSF request
454 * and acts accordingly
455 *
456 * returns:
457 */
458static int
459zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
460{
461 int retval = 0;
462
463 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
464 case FSF_SQ_FCP_RSP_AVAILABLE:
1da177e4
LT		 465 break;
466 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4 467 /* The SCSI-stack may now issue retries or escalate */
1da177e4
LT		 468 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
469 break;
470 case FSF_SQ_COMMAND_ABORTED:
1da177e4 471 /* Carry the aborted state on to upper layer */
1da177e4
LT		 472 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
473 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
474 break;
475 case FSF_SQ_NO_RECOM:
ceb3dfba 476 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a "
1da177e4
LT		 477 "problem on the adapter %s "
478 "Stopping all operations on this adapter. ",
479 zfcp_get_busid_by_adapter(fsf_req->adapter));
1f6f7129 480 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
1da177e4
LT		 481 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
482 break;
483 case FSF_SQ_ULP_PROGRAMMING_ERROR:
1da177e4
LT		 484 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
485 "(adapter %s)\n",
486 zfcp_get_busid_by_adapter(fsf_req->adapter));
1da177e4
LT		 487 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
488 break;
489 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
490 case FSF_SQ_NO_RETRY_POSSIBLE:
491 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
492 /* dealt with in the respective functions */
493 break;
494 default:
495 ZFCP_LOG_NORMAL("bug: Additional status info could "
496 "not be interpreted properly.\n");
497 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
498 (char *) &fsf_req->qtcb->header.fsf_status_qual,
499 sizeof (union fsf_status_qual));
1da177e4
LT		 500 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
501 break;
502 }
503
504 return retval;
505}
506
aef4a983
MS		 507/**
508 * zfcp_fsf_link_down_info_eval - evaluate link down information block
509 */
510static void
698ec016 511zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
aef4a983
MS		 512 struct fsf_link_down_info *link_down)
513{
698ec016
MP		 514 struct zfcp_adapter *adapter = fsf_req->adapter;
515
ee69ab7a
MS		 516 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
517 &adapter->status))
518 return;
519
520 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
521
2f8f3ed5
AH		 522 if (link_down == NULL)
523 goto out;
ee69ab7a 524
aef4a983
MS		 525 switch (link_down->error_code) {
526 case FSF_PSQ_LINK_NO_LIGHT:
527 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
528 "(no light detected)\n",
529 zfcp_get_busid_by_adapter(adapter));
530 break;
531 case FSF_PSQ_LINK_WRAP_PLUG:
532 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
533 "(wrap plug detected)\n",
534 zfcp_get_busid_by_adapter(adapter));
535 break;
536 case FSF_PSQ_LINK_NO_FCP:
537 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
538 "(adjacent node on link does not support FCP)\n",
539 zfcp_get_busid_by_adapter(adapter));
540 break;
541 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
542 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
543 "(firmware update in progress)\n",
544 zfcp_get_busid_by_adapter(adapter));
545 break;
546 case FSF_PSQ_LINK_INVALID_WWPN:
547 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
548 "(duplicate or invalid WWPN detected)\n",
549 zfcp_get_busid_by_adapter(adapter));
550 break;
551 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
552 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
553 "(no support for NPIV by Fabric)\n",
554 zfcp_get_busid_by_adapter(adapter));
555 break;
556 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
557 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
558 "(out of resource in FCP daughtercard)\n",
559 zfcp_get_busid_by_adapter(adapter));
560 break;
561 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
562 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
563 "(out of resource in Fabric)\n",
564 zfcp_get_busid_by_adapter(adapter));
565 break;
566 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
567 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
568 "(unable to Fabric login)\n",
569 zfcp_get_busid_by_adapter(adapter));
570 break;
571 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
572 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
573 zfcp_get_busid_by_adapter(adapter));
574 break;
575 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
576 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
577 zfcp_get_busid_by_adapter(adapter));
578 break;
579 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
580 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
581 zfcp_get_busid_by_adapter(adapter));
582 break;
583 default:
584 ZFCP_LOG_NORMAL("The local link to adapter %s is down "
585 "(warning: unknown reason code %d)\n",
586 zfcp_get_busid_by_adapter(adapter),
587 link_down->error_code);
588 }
589
590 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
591 ZFCP_LOG_DEBUG("Debug information to link down: "
592 "primary_status=0x%02x "
593 "ioerr_code=0x%02x "
594 "action_code=0x%02x "
595 "reason_code=0x%02x "
596 "explanation_code=0x%02x "
597 "vendor_specific_code=0x%02x\n",
598 link_down->primary_status,
599 link_down->ioerr_code,
600 link_down->action_code,
601 link_down->reason_code,
602 link_down->explanation_code,
603 link_down->vendor_specific_code);
604
2f8f3ed5 605 out:
1f6f7129 606 zfcp_erp_adapter_failed(adapter, id, fsf_req);
aef4a983
MS		 607}
608
1da177e4
LT		 609/*
610 * function: zfcp_fsf_req_dispatch
611 *
612 * purpose: calls the appropriate command specific handler
613 *
41fa2ada 614 * returns:
1da177e4
LT		 615 */
616static int
617zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
618{
619 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
620 struct zfcp_adapter *adapter = fsf_req->adapter;
621 int retval = 0;
622
1da177e4
LT		 623
624 switch (fsf_req->fsf_command) {
625
626 case FSF_QTCB_FCP_CMND:
1da177e4
LT		 627 zfcp_fsf_send_fcp_command_handler(fsf_req);
628 break;
629
630 case FSF_QTCB_ABORT_FCP_CMND:
1da177e4
LT		 631 zfcp_fsf_abort_fcp_command_handler(fsf_req);
632 break;
633
634 case FSF_QTCB_SEND_GENERIC:
1da177e4
LT		 635 zfcp_fsf_send_ct_handler(fsf_req);
636 break;
637
638 case FSF_QTCB_OPEN_PORT_WITH_DID:
1da177e4
LT		 639 zfcp_fsf_open_port_handler(fsf_req);
640 break;
641
642 case FSF_QTCB_OPEN_LUN:
1da177e4
LT		 643 zfcp_fsf_open_unit_handler(fsf_req);
644 break;
645
646 case FSF_QTCB_CLOSE_LUN:
1da177e4
LT		 647 zfcp_fsf_close_unit_handler(fsf_req);
648 break;
649
650 case FSF_QTCB_CLOSE_PORT:
1da177e4
LT		 651 zfcp_fsf_close_port_handler(fsf_req);
652 break;
653
654 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
1da177e4
LT		 655 zfcp_fsf_close_physical_port_handler(fsf_req);
656 break;
657
658 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
1da177e4
LT		 659 zfcp_fsf_exchange_config_data_handler(fsf_req);
660 break;
661
662 case FSF_QTCB_EXCHANGE_PORT_DATA:
1da177e4
LT		 663 zfcp_fsf_exchange_port_data_handler(fsf_req);
664 break;
665
666 case FSF_QTCB_SEND_ELS:
1da177e4
LT		 667 zfcp_fsf_send_els_handler(fsf_req);
668 break;
669
670 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
1da177e4
LT		 671 zfcp_fsf_control_file_handler(fsf_req);
672 break;
673
674 case FSF_QTCB_UPLOAD_CONTROL_FILE:
1da177e4
LT		 675 zfcp_fsf_control_file_handler(fsf_req);
676 break;
677
678 default:
1da177e4
LT		 679 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
680 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
681 "not supported by the adapter %s\n",
8a36e453 682 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 683 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
684 ZFCP_LOG_NORMAL
685 ("bug: Command issued by the device driver differs "
686 "from the command returned by the adapter %s "
687 "(debug info 0x%x, 0x%x).\n",
8a36e453 688 zfcp_get_busid_by_adapter(adapter),
1da177e4
LT		 689 fsf_req->fsf_command,
690 fsf_req->qtcb->header.fsf_command);
691 }
692
693 if (!erp_action)
694 return retval;
695
1da177e4
LT		 696 zfcp_erp_async_handler(erp_action, 0);
697
698 return retval;
699}
700
701/*
702 * function: zfcp_fsf_status_read
703 *
704 * purpose: initiates a Status Read command at the specified adapter
705 *
706 * returns:
707 */
708int
709zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
710{
711 struct zfcp_fsf_req *fsf_req;
712 struct fsf_status_read_buffer *status_buffer;
713 unsigned long lock_flags;
714 volatile struct qdio_buffer_element *sbale;
b2141782 715 int retval;
1da177e4
LT		 716
717 /* setup new FSF request */
718 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
719 req_flags | ZFCP_REQ_NO_QTCB,
720 adapter->pool.fsf_req_status_read,
721 &lock_flags, &fsf_req);
722 if (retval < 0) {
723 ZFCP_LOG_INFO("error: Could not create unsolicited status "
724 "buffer for adapter %s.\n",
725 zfcp_get_busid_by_adapter(adapter));
726 goto failed_req_create;
727 }
728
e891bffe 729 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 730 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
731 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
732 fsf_req->sbale_curr = 2;
733
b2141782 734 retval = -ENOMEM;
1da177e4
LT		 735 status_buffer =
736 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
b2141782 737 if (!status_buffer)
1da177e4 738 goto failed_buf;
1da177e4 739 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
059c97d0 740 fsf_req->data = (unsigned long) status_buffer;
1da177e4
LT		 741
742 /* insert pointer to respective buffer */
743 sbale = zfcp_qdio_sbale_curr(fsf_req);
744 sbale->addr = (void *) status_buffer;
745 sbale->length = sizeof(struct fsf_status_read_buffer);
746
2abbe866 747 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 748 if (retval) {
749 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
750 "environment.\n");
751 goto failed_req_send;
752 }
753
754 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
755 zfcp_get_busid_by_adapter(adapter));
756 goto out;
757
758 failed_req_send:
759 mempool_free(status_buffer, adapter->pool.data_status_read);
760
761 failed_buf:
762 zfcp_fsf_req_free(fsf_req);
763 failed_req_create:
8a36e453 764 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
1da177e4
LT		 765 out:
766 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
767 return retval;
768}
769
770static int
771zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
772{
773 struct fsf_status_read_buffer *status_buffer;
774 struct zfcp_adapter *adapter;
775 struct zfcp_port *port;
776 unsigned long flags;
777
059c97d0 778 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 779 adapter = fsf_req->adapter;
780
781 read_lock_irqsave(&zfcp_data.config_lock, flags);
782 list_for_each_entry(port, &adapter->port_list_head, list)
783 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
784 break;
785 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
786
787 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
ceb3dfba 788 ZFCP_LOG_NORMAL("bug: Reopen port indication received for "
1d589edf 789 "nonexisting port with d_id 0x%06x on "
1da177e4
LT		 790 "adapter %s. Ignored.\n",
791 status_buffer->d_id & ZFCP_DID_MASK,
792 zfcp_get_busid_by_adapter(adapter));
793 goto out;
794 }
795
796 switch (status_buffer->status_subtype) {
797
798 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
1f6f7129 799 zfcp_erp_port_reopen(port, 0, 101, fsf_req);
1da177e4
LT		 800 break;
801
802 case FSF_STATUS_READ_SUB_ERROR_PORT:
1f6f7129 803 zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
1da177e4
LT		 804 break;
805
806 default:
1da177e4
LT		 807 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
808 "for a reopen indication on port with "
1d589edf 809 "d_id 0x%06x on the adapter %s. "
1da177e4
LT		 810 "Ignored. (debug info 0x%x)\n",
811 status_buffer->d_id,
812 zfcp_get_busid_by_adapter(adapter),
813 status_buffer->status_subtype);
814 }
815 out:
816 return 0;
817}
818
819/*
820 * function: zfcp_fsf_status_read_handler
821 *
822 * purpose: is called for finished Open Port command
823 *
41fa2ada 824 * returns:
1da177e4
LT		 825 */
826static int
827zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
828{
829 int retval = 0;
830 struct zfcp_adapter *adapter = fsf_req->adapter;
831 struct fsf_status_read_buffer *status_buffer =
059c97d0 832 (struct fsf_status_read_buffer *) fsf_req->data;
b7a52fa7 833 struct fsf_bit_error_payload *fsf_bit_error;
1da177e4
LT		 834
835 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
8a36e453 836 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
1da177e4 837 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 838 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 839 goto out;
840 }
841
8a36e453
MS		 842 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
843
1da177e4
LT		 844 switch (status_buffer->status_type) {
845
846 case FSF_STATUS_READ_PORT_CLOSED:
1da177e4
LT		 847 zfcp_fsf_status_read_port_closed(fsf_req);
848 break;
849
850 case FSF_STATUS_READ_INCOMING_ELS:
24073b47 851 zfcp_fc_incoming_els(fsf_req);
1da177e4
LT		 852 break;
853
854 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4
LT		 855 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
856 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 857 break;
858
859 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
b7a52fa7
RW		 860 fsf_bit_error = (struct fsf_bit_error_payload *)
861 status_buffer->payload;
862 ZFCP_LOG_NORMAL("Warning: bit error threshold data "
863 "received (adapter %s, "
864 "link failures = %i, loss of sync errors = %i, "
865 "loss of signal errors = %i, "
866 "primitive sequence errors = %i, "
867 "invalid transmission word errors = %i, "
868 "CRC errors = %i)\n",
869 zfcp_get_busid_by_adapter(adapter),
870 fsf_bit_error->link_failure_error_count,
871 fsf_bit_error->loss_of_sync_error_count,
872 fsf_bit_error->loss_of_signal_error_count,
873 fsf_bit_error->primitive_sequence_error_count,
874 fsf_bit_error->invalid_transmission_word_error_count,
875 fsf_bit_error->crc_error_count);
876 ZFCP_LOG_INFO("Additional bit error threshold data "
877 "(adapter %s, "
878 "primitive sequence event time-outs = %i, "
879 "elastic buffer overrun errors = %i, "
880 "advertised receive buffer-to-buffer credit = %i, "
881 "current receice buffer-to-buffer credit = %i, "
882 "advertised transmit buffer-to-buffer credit = %i, "
883 "current transmit buffer-to-buffer credit = %i)\n",
884 zfcp_get_busid_by_adapter(adapter),
885 fsf_bit_error->primitive_sequence_event_timeout_count,
886 fsf_bit_error->elastic_buffer_overrun_error_count,
887 fsf_bit_error->advertised_receive_b2b_credit,
888 fsf_bit_error->current_receive_b2b_credit,
889 fsf_bit_error->advertised_transmit_b2b_credit,
890 fsf_bit_error->current_transmit_b2b_credit);
1da177e4
LT		 891 break;
892
893 case FSF_STATUS_READ_LINK_DOWN:
aef4a983
MS		 894 switch (status_buffer->status_subtype) {
895 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
896 ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
897 zfcp_get_busid_by_adapter(adapter));
698ec016 898 zfcp_fsf_link_down_info_eval(fsf_req, 38,
ee69ab7a
MS		 899 (struct fsf_link_down_info *)
900 &status_buffer->payload);
aef4a983
MS		 901 break;
902 case FSF_STATUS_READ_SUB_FDISC_FAILED:
903 ZFCP_LOG_INFO("Local link to adapter %s is down "
904 "due to failed FDISC login\n",
ee69ab7a 905 zfcp_get_busid_by_adapter(adapter));
698ec016 906 zfcp_fsf_link_down_info_eval(fsf_req, 39,
ee69ab7a
MS		 907 (struct fsf_link_down_info *)
908 &status_buffer->payload);
aef4a983
MS		 909 break;
910 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
911 ZFCP_LOG_INFO("Local link to adapter %s is down "
912 "due to firmware update on adapter\n",
913 zfcp_get_busid_by_adapter(adapter));
698ec016 914 zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
aef4a983
MS		 915 break;
916 default:
917 ZFCP_LOG_INFO("Local link to adapter %s is down "
918 "due to unknown reason\n",
919 zfcp_get_busid_by_adapter(adapter));
698ec016 920 zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
aef4a983 921 };
1da177e4
LT		 922 break;
923
924 case FSF_STATUS_READ_LINK_UP:
aef4a983 925 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
ee69ab7a
MS		 926 "Restarting operations on this adapter\n",
927 zfcp_get_busid_by_adapter(adapter));
1da177e4 928 /* All ports should be marked as ready to run again */
1f6f7129 929 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
1da177e4
LT		 930 ZFCP_STATUS_COMMON_RUNNING,
931 ZFCP_SET);
932 zfcp_erp_adapter_reopen(adapter,
933 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
9467a9b3 934 | ZFCP_STATUS_COMMON_ERP_FAILED,
1f6f7129 935 102, fsf_req);
1da177e4
LT		 936 break;
937
9eb69aff
MS		 938 case FSF_STATUS_READ_NOTIFICATION_LOST:
939 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
940 "adapter %s%s%s%s%s%s%s%s%s\n",
941 zfcp_get_busid_by_adapter(adapter),
942 (status_buffer->status_subtype &
943 FSF_STATUS_READ_SUB_INCOMING_ELS) ?
944 ", incoming ELS" : "",
945 (status_buffer->status_subtype &
946 FSF_STATUS_READ_SUB_SENSE_DATA) ?
947 ", sense data" : "",
948 (status_buffer->status_subtype &
949 FSF_STATUS_READ_SUB_LINK_STATUS) ?
950 ", link status change" : "",
951 (status_buffer->status_subtype &
952 FSF_STATUS_READ_SUB_PORT_CLOSED) ?
953 ", port close" : "",
954 (status_buffer->status_subtype &
955 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
956 ", bit error exception" : "",
957 (status_buffer->status_subtype &
958 FSF_STATUS_READ_SUB_ACT_UPDATED) ?
959 ", ACT update" : "",
960 (status_buffer->status_subtype &
961 FSF_STATUS_READ_SUB_ACT_HARDENED) ?
962 ", ACT hardening" : "",
963 (status_buffer->status_subtype &
964 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
965 ", adapter feature change" : "");
966
967 if (status_buffer->status_subtype &
968 FSF_STATUS_READ_SUB_ACT_UPDATED)
1f6f7129 969 zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
9eb69aff
MS		 970 break;
971
1da177e4 972 case FSF_STATUS_READ_CFDC_UPDATED:
8a36e453 973 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
1da177e4 974 zfcp_get_busid_by_adapter(adapter));
1f6f7129 975 zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
1da177e4
LT		 976 break;
977
978 case FSF_STATUS_READ_CFDC_HARDENED:
1da177e4
LT		 979 switch (status_buffer->status_subtype) {
980 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
8a36e453 981 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
1da177e4
LT		 982 zfcp_get_busid_by_adapter(adapter));
983 break;
984 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
8a36e453 985 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
1da177e4
LT		 986 "to the secondary SE\n",
987 zfcp_get_busid_by_adapter(adapter));
988 break;
989 default:
8a36e453 990 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
1da177e4
LT		 991 zfcp_get_busid_by_adapter(adapter));
992 }
993 break;
994
aef4a983 995 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
aef4a983
MS		 996 ZFCP_LOG_INFO("List of supported features on adapter %s has "
997 "been changed from 0x%08X to 0x%08X\n",
998 zfcp_get_busid_by_adapter(adapter),
999 *(u32*) (status_buffer->payload + 4),
1000 *(u32*) (status_buffer->payload));
1001 adapter->adapter_features = *(u32*) status_buffer->payload;
1002 break;
1003
1da177e4 1004 default:
8a36e453 1005 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
1da177e4
LT		 1006 "type was received (debug info 0x%x)\n",
1007 status_buffer->status_type);
1008 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1009 status_buffer);
1010 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1011 (char *) status_buffer,
1012 sizeof (struct fsf_status_read_buffer));
1013 break;
1014 }
1015 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 1016 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 1017 /*
1018 * recycle buffer and start new request repeat until outbound
1019 * queue is empty or adapter shutdown is requested
1020 */
1021 /*
1022 * FIXME(qdio):
1023 * we may wait in the req_create for 5s during shutdown, so
1024 * qdio_cleanup will have to wait at least that long before returning
1025 * with failure to allow us a proper cleanup under all circumstances
1026 */
1027 /*
1028 * FIXME:
1029 * allocation failure possible? (Is this code needed?)
1030 */
d26ab06e
SS		 1031
1032 atomic_inc(&adapter->stat_miss);
1033 schedule_work(&adapter->stat_work);
1da177e4
LT		 1034 out:
1035 return retval;
1036}
1037
1038/*
1039 * function: zfcp_fsf_abort_fcp_command
1040 *
1041 * purpose: tells FSF to abort a running SCSI command
1042 *
1043 * returns: address of initiated FSF request
1044 * NULL - request could not be initiated
1045 *
41fa2ada 1046 * FIXME(design): should be watched by a timeout !!!
1da177e4
LT		 1047 * FIXME(design) shouldn't this be modified to return an int
1048 * also...don't know how though
1049 */
1050struct zfcp_fsf_req *
1051zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1052 struct zfcp_adapter *adapter,
1053 struct zfcp_unit *unit, int req_flags)
1054{
1055 volatile struct qdio_buffer_element *sbale;
1da177e4 1056 struct zfcp_fsf_req *fsf_req = NULL;
2abbe866 1057 unsigned long lock_flags;
1da177e4
LT		 1058 int retval = 0;
1059
1060 /* setup new FSF request */
1061 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1062 req_flags, adapter->pool.fsf_req_abort,
1063 &lock_flags, &fsf_req);
1064 if (retval < 0) {
1065 ZFCP_LOG_INFO("error: Failed to create an abort command "
1066 "request for lun 0x%016Lx on port 0x%016Lx "
1067 "on adapter %s.\n",
1068 unit->fcp_lun,
1069 unit->port->wwpn,
1070 zfcp_get_busid_by_adapter(adapter));
1071 goto out;
1072 }
1073
951f746f
CS		 1074 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1075 &unit->status)))
1076 goto unit_blocked;
1077
e891bffe 1078 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 1079 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1080 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1081
059c97d0 1082 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 1083
1084 /* set handles of unit and its parent port in QTCB */
1085 fsf_req->qtcb->header.lun_handle = unit->handle;
1086 fsf_req->qtcb->header.port_handle = unit->port->handle;
1087
1088 /* set handle of request which should be aborted */
1089 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1090
2abbe866
AH		 1091 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
1092 retval = zfcp_fsf_req_send(fsf_req);
951f746f
CS		 1093 if (!retval)
1094 goto out;
1095
1096 unit_blocked:
1da177e4
LT		 1097 zfcp_fsf_req_free(fsf_req);
1098 fsf_req = NULL;
1da177e4 1099
1da177e4
LT		 1100 out:
1101 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1102 return fsf_req;
1103}
1104
1105/*
1106 * function: zfcp_fsf_abort_fcp_command_handler
1107 *
1108 * purpose: is called for finished Abort FCP Command request
1109 *
41fa2ada 1110 * returns:
1da177e4
LT		 1111 */
1112static int
1113zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1114{
1115 int retval = -EINVAL;
059c97d0 1116 struct zfcp_unit *unit;
8627533c
CS		 1117 union fsf_status_qual *fsf_stat_qual =
1118 &new_fsf_req->qtcb->header.fsf_status_qual;
1da177e4 1119
1da177e4
LT		 1120 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1121 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1122 goto skip_fsfstatus;
1123 }
1124
059c97d0
AH		 1125 unit = (struct zfcp_unit *) new_fsf_req->data;
1126
1da177e4
LT		 1127 /* evaluate FSF status in QTCB */
1128 switch (new_fsf_req->qtcb->header.fsf_status) {
1129
1130 case FSF_PORT_HANDLE_NOT_VALID:
8627533c 1131 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1132 /*
1133 * In this case a command that was sent prior to a port
1134 * reopen was aborted (handles are different). This is
1135 * fine.
1136 */
1137 } else {
1da177e4
LT		 1138 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1139 "port 0x%016Lx on adapter %s invalid. "
1140 "This may happen occasionally.\n",
1141 unit->port->handle,
1142 unit->port->wwpn,
1143 zfcp_get_busid_by_unit(unit));
1144 ZFCP_LOG_INFO("status qualifier:\n");
1145 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1146 (char *) &new_fsf_req->qtcb->header.
1147 fsf_status_qual,
1148 sizeof (union fsf_status_qual));
1149 /* Let's hope this sorts out the mess */
9467a9b3 1150 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
1f6f7129 1151 new_fsf_req);
1da177e4
LT		 1152 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1153 }
1154 break;
1155
1156 case FSF_LUN_HANDLE_NOT_VALID:
8627533c 1157 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1158 /*
1159 * In this case a command that was sent prior to a unit
1160 * reopen was aborted (handles are different).
1161 * This is fine.
1162 */
1163 } else {
1da177e4
LT		 1164 ZFCP_LOG_INFO
1165 ("Warning: Temporary LUN identifier 0x%x of LUN "
1166 "0x%016Lx on port 0x%016Lx on adapter %s is "
1167 "invalid. This may happen in rare cases. "
1168 "Trying to re-establish link.\n",
1169 unit->handle,
1170 unit->fcp_lun,
1171 unit->port->wwpn,
1172 zfcp_get_busid_by_unit(unit));
1173 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1174 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1175 (char *) &new_fsf_req->qtcb->header.
1176 fsf_status_qual,
1177 sizeof (union fsf_status_qual));
1178 /* Let's hope this sorts out the mess */
1f6f7129 1179 zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
1da177e4
LT		 1180 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1181 }
1182 break;
1183
1184 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1da177e4 1185 retval = 0;
1da177e4
LT		 1186 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1187 break;
1188
1189 case FSF_PORT_BOXED:
1da177e4
LT		 1190 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1191 "be reopened\n", unit->port->wwpn,
1192 zfcp_get_busid_by_unit(unit));
1f6f7129 1193 zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
1da177e4
LT		 1194 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1195 | ZFCP_STATUS_FSFREQ_RETRY;
1196 break;
1197
1198 case FSF_LUN_BOXED:
1da177e4
LT		 1199 ZFCP_LOG_INFO(
1200 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1201 "to be reopened\n",
1202 unit->fcp_lun, unit->port->wwpn,
1203 zfcp_get_busid_by_unit(unit));
1f6f7129 1204 zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
1da177e4
LT		 1205 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1206 | ZFCP_STATUS_FSFREQ_RETRY;
1207 break;
1208
1209 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1210 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1211 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1212 zfcp_test_link(unit->port);
1da177e4
LT		 1213 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1214 break;
1215 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1216 /* SCSI stack will escalate */
1da177e4
LT		 1217 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1218 break;
1219 default:
1220 ZFCP_LOG_NORMAL
1221 ("bug: Wrong status qualifier 0x%x arrived.\n",
1222 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1da177e4
LT		 1223 break;
1224 }
1225 break;
1226
1227 case FSF_GOOD:
1da177e4
LT		 1228 retval = 0;
1229 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1230 break;
1231
1232 default:
1233 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1234 "(debug info 0x%x)\n",
1235 new_fsf_req->qtcb->header.fsf_status);
1da177e4
LT		 1236 break;
1237 }
1238 skip_fsfstatus:
1239 return retval;
1240}
1241
1242/**
1243 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1244 * one SBALE
1245 * Two scatter-gather lists are passed, one for the reqeust and one for the
1246 * response.
1247 */
1248static inline int
1249zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1250 struct scatterlist *resp, int resp_count)
1251{
1252 return ((req_count == 1) &&
1253 (resp_count == 1) &&
1254 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1255 PAGE_MASK) ==
1256 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1257 req[0].length - 1) & PAGE_MASK)) &&
1258 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1259 PAGE_MASK) ==
1260 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1261 resp[0].length - 1) & PAGE_MASK)));
1262}
1263
1264/**
1265 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1266 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1267 * the request
1268 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1269 * a struct zfcp_fsf_req
1270 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1271 * is sent within error recovery
1272 */
1273int
1274zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1275 struct zfcp_erp_action *erp_action)
1276{
1277 volatile struct qdio_buffer_element *sbale;
1278 struct zfcp_port *port;
1279 struct zfcp_adapter *adapter;
1280 struct zfcp_fsf_req *fsf_req;
1281 unsigned long lock_flags;
1282 int bytes;
1283 int ret = 0;
1284
1285 port = ct->port;
1286 adapter = port->adapter;
1287
1288 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1289 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1290 pool, &lock_flags, &fsf_req);
1291 if (ret < 0) {
1292 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1293 "adapter: %s\n",
1294 zfcp_get_busid_by_adapter(adapter));
1295 goto failed_req;
1296 }
1297
e891bffe 1298 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 1299 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1300 ct->resp, ct->resp_count)){
1301 /* both request buffer and response buffer
1302 fit into one sbale each */
1303 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1304 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1305 sbale[2].length = ct->req[0].length;
1306 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1307 sbale[3].length = ct->resp[0].length;
1308 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1309 } else if (adapter->adapter_features &
1da177e4
LT		 1310 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1311 /* try to use chained SBALs */
1312 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1313 SBAL_FLAGS0_TYPE_WRITE_READ,
1314 ct->req, ct->req_count,
1315 ZFCP_MAX_SBALS_PER_CT_REQ);
1316 if (bytes <= 0) {
1317 ZFCP_LOG_INFO("error: creation of CT request failed "
1318 "on adapter %s\n",
1319 zfcp_get_busid_by_adapter(adapter));
1320 if (bytes == 0)
1321 ret = -ENOMEM;
1322 else
1323 ret = bytes;
1324
1325 goto failed_send;
1326 }
1327 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1328 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1329 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1330 SBAL_FLAGS0_TYPE_WRITE_READ,
1331 ct->resp, ct->resp_count,
1332 ZFCP_MAX_SBALS_PER_CT_REQ);
1333 if (bytes <= 0) {
1334 ZFCP_LOG_INFO("error: creation of CT request failed "
1335 "on adapter %s\n",
1336 zfcp_get_busid_by_adapter(adapter));
1337 if (bytes == 0)
1338 ret = -ENOMEM;
1339 else
1340 ret = bytes;
1341
1342 goto failed_send;
1343 }
1344 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1345 } else {
1346 /* reject send generic request */
1347 ZFCP_LOG_INFO(
1348 "error: microcode does not support chained SBALs,"
1349 "CT request too big (adapter %s)\n",
1350 zfcp_get_busid_by_adapter(adapter));
1351 ret = -EOPNOTSUPP;
1352 goto failed_send;
1353 }
1354
1355 /* settings in QTCB */
1356 fsf_req->qtcb->header.port_handle = port->handle;
06506d00
AH		 1357 fsf_req->qtcb->bottom.support.service_class =
1358 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1359 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
059c97d0 1360 fsf_req->data = (unsigned long) ct;
1da177e4 1361
8a36e453
MS		 1362 zfcp_san_dbf_event_ct_request(fsf_req);
1363
2abbe866
AH		 1364 if (erp_action) {
1365 erp_action->fsf_req = fsf_req;
1366 fsf_req->erp_action = erp_action;
1367 zfcp_erp_start_timer(fsf_req);
1368 } else
1369 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1370
1371 ret = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 1372 if (ret) {
1373 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1374 "(adapter %s, port 0x%016Lx)\n",
1375 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1376 goto failed_send;
1377 }
1378
1379 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1380 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1381 goto out;
1382
1383 failed_send:
1384 zfcp_fsf_req_free(fsf_req);
1385 if (erp_action != NULL) {
1386 erp_action->fsf_req = NULL;
1387 }
1388 failed_req:
1389 out:
1390 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1391 lock_flags);
1392 return ret;
1393}
1394
1395/**
1396 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1397 * @fsf_req: pointer to struct zfcp_fsf_req
1398 *
059c97d0
AH		 1399 * Data specific for the Generic Service request is passed using
1400 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1401 * Usually a specific handler for the CT request is called which is
1402 * found in this structure.
1da177e4
LT		 1403 */
1404static int
1405zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1406{
1407 struct zfcp_port *port;
1408 struct zfcp_adapter *adapter;
1409 struct zfcp_send_ct *send_ct;
1410 struct fsf_qtcb_header *header;
1411 struct fsf_qtcb_bottom_support *bottom;
1412 int retval = -EINVAL;
1413 u16 subtable, rule, counter;
1414
1415 adapter = fsf_req->adapter;
059c97d0 1416 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1da177e4
LT		 1417 port = send_ct->port;
1418 header = &fsf_req->qtcb->header;
1419 bottom = &fsf_req->qtcb->bottom.support;
1420
1421 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1422 goto skip_fsfstatus;
1423
1424 /* evaluate FSF status in QTCB */
1425 switch (header->fsf_status) {
1426
1427 case FSF_GOOD:
8a36e453 1428 zfcp_san_dbf_event_ct_response(fsf_req);
1da177e4
LT		 1429 retval = 0;
1430 break;
1431
1432 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 1433 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1434 "class %d.\n",
1435 zfcp_get_busid_by_port(port),
1436 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4 1437 /* stop operation for this adapter */
1f6f7129 1438 zfcp_erp_adapter_shutdown(adapter, 0, 123, fsf_req);
1da177e4
LT		 1439 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1440 break;
1441
1442 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1443 switch (header->fsf_status_qual.word[0]){
1444 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1445 /* reopening link to port */
1da177e4
LT		 1446 zfcp_test_link(port);
1447 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1448 break;
1449 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1450 /* ERP strategy will escalate */
1da177e4
LT		 1451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452 break;
1453 default:
1454 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1455 "arrived.\n",
1456 header->fsf_status_qual.word[0]);
1457 break;
1458 }
1459 break;
1460
1461 case FSF_ACCESS_DENIED:
1da177e4 1462 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1d589edf 1463 "command (adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1464 zfcp_get_busid_by_port(port), port->d_id);
1465 for (counter = 0; counter < 2; counter++) {
1466 subtable = header->fsf_status_qual.halfword[counter * 2];
1467 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1468 switch (subtable) {
1469 case FSF_SQ_CFDC_SUBTABLE_OS:
1470 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1471 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1472 case FSF_SQ_CFDC_SUBTABLE_LUN:
1473 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1474 zfcp_act_subtable_type[subtable], rule);
1475 break;
1476 }
1477 }
1f6f7129 1478 zfcp_erp_port_access_denied(port, 55, fsf_req);
1da177e4
LT		 1479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1480 break;
1481
1482 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 1483 ZFCP_LOG_INFO("generic service command rejected "
1d589edf 1484 "(adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1485 zfcp_get_busid_by_port(port), port->d_id);
1486 ZFCP_LOG_INFO("status qualifier:\n");
1487 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1488 (char *) &header->fsf_status_qual,
1489 sizeof (union fsf_status_qual));
1da177e4
LT		 1490 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1491 break;
1492
1493 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 1494 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1495 "0x%016Lx on adapter %s invalid. This may "
1496 "happen occasionally.\n", port->handle,
1497 port->wwpn, zfcp_get_busid_by_port(port));
1498 ZFCP_LOG_INFO("status qualifier:\n");
1499 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1500 (char *) &header->fsf_status_qual,
1501 sizeof (union fsf_status_qual));
1f6f7129 1502 zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
1da177e4
LT		 1503 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1504 break;
1505
1506 case FSF_PORT_BOXED:
1da177e4 1507 ZFCP_LOG_INFO("port needs to be reopened "
1d589edf 1508 "(adapter %s, port d_id=0x%06x)\n",
1da177e4 1509 zfcp_get_busid_by_port(port), port->d_id);
1f6f7129 1510 zfcp_erp_port_boxed(port, 49, fsf_req);
1da177e4
LT		 1511 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1512 | ZFCP_STATUS_FSFREQ_RETRY;
1513 break;
1514
1515 /* following states should never occure, all cases avoided
1516 in zfcp_fsf_send_ct - but who knows ... */
1517 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1518 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1519 "req_buf_length=%d, resp_buf_length=%d)\n",
1520 zfcp_get_busid_by_adapter(adapter),
1521 bottom->req_buf_length, bottom->resp_buf_length);
1522 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1523 break;
1524 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1525 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1526 "req_buf_length=%d)\n",
1527 zfcp_get_busid_by_adapter(adapter),
1528 bottom->req_buf_length);
1529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1530 break;
1531 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1532 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1533 "resp_buf_length=%d)\n",
1534 zfcp_get_busid_by_adapter(adapter),
1535 bottom->resp_buf_length);
1536 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1537 break;
1538 case FSF_SBAL_MISMATCH:
1da177e4
LT		 1539 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1540 "resp_buf_length=%d)\n",
1541 zfcp_get_busid_by_adapter(adapter),
1542 bottom->req_buf_length, bottom->resp_buf_length);
1543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1544 break;
1545
1546 default:
1547 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1548 "(debug info 0x%x)\n", header->fsf_status);
1da177e4
LT		 1549 break;
1550 }
1551
1552skip_fsfstatus:
1553 send_ct->status = retval;
1554
1555 if (send_ct->handler != NULL)
1556 send_ct->handler(send_ct->handler_data);
1557
1558 return retval;
1559}
1560
1561/**
1562 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1563 * @els: pointer to struct zfcp_send_els which contains all needed data for
1564 * the command.
1565 */
1566int
1567zfcp_fsf_send_els(struct zfcp_send_els *els)
1568{
1569 volatile struct qdio_buffer_element *sbale;
1570 struct zfcp_fsf_req *fsf_req;
13e1e1f0 1571 u32 d_id;
1da177e4
LT		 1572 struct zfcp_adapter *adapter;
1573 unsigned long lock_flags;
1574 int bytes;
1575 int ret = 0;
1576
1577 d_id = els->d_id;
1578 adapter = els->adapter;
1579
1580 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1581 ZFCP_REQ_AUTO_CLEANUP,
1582 NULL, &lock_flags, &fsf_req);
1583 if (ret < 0) {
1584 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1585 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1586 zfcp_get_busid_by_adapter(adapter), d_id);
1587 goto failed_req;
1588 }
1589
3f0ca62a
CS		 1590 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1591 &els->port->status))) {
1592 ret = -EBUSY;
1593 goto port_blocked;
1594 }
1595
e891bffe 1596 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 1597 if (zfcp_use_one_sbal(els->req, els->req_count,
1598 els->resp, els->resp_count)){
1599 /* both request buffer and response buffer
1600 fit into one sbale each */
1601 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1602 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1603 sbale[2].length = els->req[0].length;
1604 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1605 sbale[3].length = els->resp[0].length;
1606 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1607 } else if (adapter->adapter_features &
1da177e4
LT		 1608 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1609 /* try to use chained SBALs */
1610 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1611 SBAL_FLAGS0_TYPE_WRITE_READ,
1612 els->req, els->req_count,
1613 ZFCP_MAX_SBALS_PER_ELS_REQ);
1614 if (bytes <= 0) {
1615 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1616 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1617 zfcp_get_busid_by_adapter(adapter), d_id);
1618 if (bytes == 0) {
1619 ret = -ENOMEM;
1620 } else {
1621 ret = bytes;
1622 }
1623 goto failed_send;
1624 }
1625 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1626 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1627 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1628 SBAL_FLAGS0_TYPE_WRITE_READ,
1629 els->resp, els->resp_count,
1630 ZFCP_MAX_SBALS_PER_ELS_REQ);
1631 if (bytes <= 0) {
1632 ZFCP_LOG_INFO("error: creation of ELS request failed "
1d589edf 1633 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1634 zfcp_get_busid_by_adapter(adapter), d_id);
1635 if (bytes == 0) {
1636 ret = -ENOMEM;
1637 } else {
1638 ret = bytes;
1639 }
1640 goto failed_send;
1641 }
1642 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1643 } else {
1644 /* reject request */
1645 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1646 ", ELS request too big (adapter %s, "
1d589edf 1647 "port d_id: 0x%06x)\n",
1da177e4
LT		 1648 zfcp_get_busid_by_adapter(adapter), d_id);
1649 ret = -EOPNOTSUPP;
1650 goto failed_send;
1651 }
1652
1653 /* settings in QTCB */
1654 fsf_req->qtcb->bottom.support.d_id = d_id;
06506d00
AH		 1655 fsf_req->qtcb->bottom.support.service_class =
1656 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1657 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
059c97d0 1658 fsf_req->data = (unsigned long) els;
1da177e4 1659
e891bffe 1660 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4 1661
8a36e453
MS		 1662 zfcp_san_dbf_event_els_request(fsf_req);
1663
2abbe866
AH		 1664 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1665 ret = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 1666 if (ret) {
1667 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1d589edf 1668 "(adapter %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1669 zfcp_get_busid_by_adapter(adapter), d_id);
1670 goto failed_send;
1671 }
1672
1673 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1d589edf 1674 "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1da177e4
LT		 1675 goto out;
1676
3f0ca62a 1677 port_blocked:
1da177e4
LT		 1678 failed_send:
1679 zfcp_fsf_req_free(fsf_req);
1680
1681 failed_req:
1682 out:
1683 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1684 lock_flags);
1685
1686 return ret;
1687}
1688
1689/**
1690 * zfcp_fsf_send_els_handler - handler for ELS commands
1691 * @fsf_req: pointer to struct zfcp_fsf_req
1692 *
059c97d0
AH		 1693 * Data specific for the ELS command is passed using
1694 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1695 * Usually a specific handler for the ELS command is called which is
1696 * found in this structure.
1da177e4
LT		 1697 */
1698static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1699{
1700 struct zfcp_adapter *adapter;
1da177e4 1701 struct zfcp_port *port;
13e1e1f0 1702 u32 d_id;
1da177e4
LT		 1703 struct fsf_qtcb_header *header;
1704 struct fsf_qtcb_bottom_support *bottom;
1705 struct zfcp_send_els *send_els;
1706 int retval = -EINVAL;
1707 u16 subtable, rule, counter;
1708
059c97d0 1709 send_els = (struct zfcp_send_els *) fsf_req->data;
1da177e4 1710 adapter = send_els->adapter;
64b29a13 1711 port = send_els->port;
1da177e4
LT		 1712 d_id = send_els->d_id;
1713 header = &fsf_req->qtcb->header;
1714 bottom = &fsf_req->qtcb->bottom.support;
1715
1716 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1717 goto skip_fsfstatus;
1718
1719 switch (header->fsf_status) {
1720
1721 case FSF_GOOD:
8a36e453 1722 zfcp_san_dbf_event_els_response(fsf_req);
1da177e4
LT		 1723 retval = 0;
1724 break;
1725
1726 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 1727 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1728 "class %d.\n",
1729 zfcp_get_busid_by_adapter(adapter),
1730 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4 1731 /* stop operation for this adapter */
1f6f7129 1732 zfcp_erp_adapter_shutdown(adapter, 0, 124, fsf_req);
1da177e4
LT		 1733 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1734 break;
1735
1736 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1737 switch (header->fsf_status_qual.word[0]){
1738 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1739 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1740 zfcp_test_link(port);
1da177e4
LT		 1741 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1742 break;
1743 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1744 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1745 break;
1746 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 1747 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1748 break;
1749 default:
1750 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1751 header->fsf_status_qual.word[0]);
1752 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1753 (char*)header->fsf_status_qual.word, 16);
1754 }
1755 break;
1756
1757 case FSF_ELS_COMMAND_REJECTED:
1da177e4
LT		 1758 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1759 "prohibited sending "
1d589edf 1760 "(adapter: %s, port d_id: 0x%06x)\n",
1da177e4
LT		 1761 zfcp_get_busid_by_adapter(adapter), d_id);
1762
1763 break;
1764
1765 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4
LT		 1766 ZFCP_LOG_INFO(
1767 "ELS request size and ELS response size must be either "
1768 "both 0, or both greater than 0 "
1769 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1770 zfcp_get_busid_by_adapter(adapter),
1771 bottom->req_buf_length,
1772 bottom->resp_buf_length);
1773 break;
1774
1775 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4
LT		 1776 ZFCP_LOG_INFO(
1777 "Length of the ELS request buffer, "
1778 "specified in QTCB bottom, "
1779 "exceeds the size of the buffers "
1780 "that have been allocated for ELS request data "
1781 "(adapter: %s, req_buf_length=%d)\n",
1782 zfcp_get_busid_by_adapter(adapter),
1783 bottom->req_buf_length);
1784 break;
1785
1786 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1787 ZFCP_LOG_INFO(
1788 "Length of the ELS response buffer, "
1789 "specified in QTCB bottom, "
1790 "exceeds the size of the buffers "
1791 "that have been allocated for ELS response data "
1792 "(adapter: %s, resp_buf_length=%d)\n",
1793 zfcp_get_busid_by_adapter(adapter),
1794 bottom->resp_buf_length);
1795 break;
1796
1797 case FSF_SBAL_MISMATCH:
1798 /* should never occure, avoided in zfcp_fsf_send_els */
1da177e4
LT		 1799 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1800 "resp_buf_length=%d)\n",
1801 zfcp_get_busid_by_adapter(adapter),
1802 bottom->req_buf_length, bottom->resp_buf_length);
1803 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1804 break;
1805
1806 case FSF_ACCESS_DENIED:
1da177e4 1807 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1d589edf 1808 "(adapter %s, port d_id=0x%06x)\n",
1da177e4
LT		 1809 zfcp_get_busid_by_adapter(adapter), d_id);
1810 for (counter = 0; counter < 2; counter++) {
1811 subtable = header->fsf_status_qual.halfword[counter * 2];
1812 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1813 switch (subtable) {
1814 case FSF_SQ_CFDC_SUBTABLE_OS:
1815 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1816 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1817 case FSF_SQ_CFDC_SUBTABLE_LUN:
1818 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1819 zfcp_act_subtable_type[subtable], rule);
1820 break;
1821 }
1822 }
1da177e4 1823 if (port != NULL)
1f6f7129 1824 zfcp_erp_port_access_denied(port, 56, fsf_req);
1da177e4
LT		 1825 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1826 break;
1827
1828 default:
1829 ZFCP_LOG_NORMAL(
1830 "bug: An unknown FSF Status was presented "
1831 "(adapter: %s, fsf_status=0x%08x)\n",
1832 zfcp_get_busid_by_adapter(adapter),
1833 header->fsf_status);
1da177e4
LT		 1834 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1835 break;
1836 }
1837
1838skip_fsfstatus:
1839 send_els->status = retval;
1840
aa551daf 1841 if (send_els->handler)
1da177e4
LT		 1842 send_els->handler(send_els->handler_data);
1843
1844 return retval;
1845}
1846
1da177e4
LT		 1847int
1848zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1849{
1850 volatile struct qdio_buffer_element *sbale;
2abbe866 1851 struct zfcp_fsf_req *fsf_req;
52ef11a7 1852 struct zfcp_adapter *adapter = erp_action->adapter;
1da177e4 1853 unsigned long lock_flags;
52ef11a7 1854 int retval;
1da177e4
LT		 1855
1856 /* setup new FSF request */
52ef11a7 1857 retval = zfcp_fsf_req_create(adapter,
1da177e4
LT		 1858 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1859 ZFCP_REQ_AUTO_CLEANUP,
52ef11a7 1860 adapter->pool.fsf_req_erp,
2abbe866 1861 &lock_flags, &fsf_req);
52ef11a7 1862 if (retval) {
1da177e4
LT		 1863 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1864 "data request for adapter %s.\n",
52ef11a7
SS		 1865 zfcp_get_busid_by_adapter(adapter));
1866 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1867 lock_flags);
1868 return retval;
1da177e4
LT		 1869 }
1870
e891bffe 1871 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
52ef11a7
SS		 1872 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1873 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1874
2abbe866 1875 fsf_req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1876 FSF_FEATURE_CFDC |
1877 FSF_FEATURE_LUN_SHARING |
9eb69aff 1878 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1879 FSF_FEATURE_UPDATE_ALERT;
2abbe866
AH		 1880 fsf_req->erp_action = erp_action;
1881 erp_action->fsf_req = fsf_req;
1da177e4 1882
2abbe866
AH		 1883 zfcp_erp_start_timer(fsf_req);
1884 retval = zfcp_fsf_req_send(fsf_req);
52ef11a7
SS		 1885 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1886 lock_flags);
1da177e4 1887 if (retval) {
52ef11a7
SS		 1888 ZFCP_LOG_INFO("error: Could not send exchange configuration "
1889 "data command on the adapter %s\n",
1890 zfcp_get_busid_by_adapter(adapter));
2abbe866 1891 zfcp_fsf_req_free(fsf_req);
1da177e4 1892 erp_action->fsf_req = NULL;
1da177e4 1893 }
52ef11a7
SS		 1894 else
1895 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
1896 "(adapter %s)\n",
1897 zfcp_get_busid_by_adapter(adapter));
1da177e4 1898
52ef11a7
SS		 1899 return retval;
1900}
1da177e4 1901
52ef11a7
SS		 1902int
1903zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1904 struct fsf_qtcb_bottom_config *data)
1905{
1906 volatile struct qdio_buffer_element *sbale;
1907 struct zfcp_fsf_req *fsf_req;
1908 unsigned long lock_flags;
1909 int retval;
1910
1911 /* setup new FSF request */
1912 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
aee6ef18
SS		 1913 ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
1914 &fsf_req);
52ef11a7
SS		 1915 if (retval) {
1916 ZFCP_LOG_INFO("error: Could not create exchange configuration "
1917 "data request for adapter %s.\n",
1918 zfcp_get_busid_by_adapter(adapter));
1919 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1920 lock_flags);
1921 return retval;
1922 }
1923
e891bffe 1924 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
52ef11a7
SS		 1925 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1926 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1927
1928 fsf_req->qtcb->bottom.config.feature_selection =
1929 FSF_FEATURE_CFDC |
1930 FSF_FEATURE_LUN_SHARING |
1931 FSF_FEATURE_NOTIFICATION_LOST |
1932 FSF_FEATURE_UPDATE_ALERT;
1933
1934 if (data)
1935 fsf_req->data = (unsigned long) data;
1936
1937 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1938 retval = zfcp_fsf_req_send(fsf_req);
1939 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1da177e4 1940 lock_flags);
52ef11a7
SS		 1941 if (retval)
1942 ZFCP_LOG_INFO("error: Could not send exchange configuration "
1943 "data command on the adapter %s\n",
1944 zfcp_get_busid_by_adapter(adapter));
1945 else
1946 wait_event(fsf_req->completion_wq,
1947 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1948
1949 zfcp_fsf_req_free(fsf_req);
1950
1da177e4
LT		 1951 return retval;
1952}
1953
1954/**
1955 * zfcp_fsf_exchange_config_evaluate
1956 * @fsf_req: fsf_req which belongs to xchg config data request
1957 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1958 *
1959 * returns: -EIO on error, 0 otherwise
1960 */
1961static int
1962zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1963{
1964 struct fsf_qtcb_bottom_config *bottom;
1965 struct zfcp_adapter *adapter = fsf_req->adapter;
13e1e1f0 1966 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4
LT		 1967
1968 bottom = &fsf_req->qtcb->bottom.config;
1969 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
1970 bottom->low_qtcb_version, bottom->high_qtcb_version);
1971 adapter->fsf_lic_version = bottom->lic_version;
aef4a983
MS		 1972 adapter->adapter_features = bottom->adapter_features;
1973 adapter->connection_features = bottom->connection_features;
6f71d9bc 1974 adapter->peer_wwpn = 0;
1975 adapter->peer_wwnn = 0;
1976 adapter->peer_d_id = 0;
1da177e4
LT		 1977
1978 if (xchg_ok) {
52ef11a7
SS		 1979
1980 if (fsf_req->data)
1981 memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
1982 bottom, sizeof (struct fsf_qtcb_bottom_config));
1983
13e1e1f0
AH		 1984 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
1985 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
1986 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
1987 fc_host_speed(shost) = bottom->fc_link_speed;
52ef11a7
SS		 1988 fc_host_supported_classes(shost) =
1989 FC_COS_CLASS2 | FC_COS_CLASS3;
1da177e4 1990 adapter->hydra_version = bottom->adapter_type;
c9615858 1991 adapter->timer_ticks = bottom->timer_interval;
ad757cdf
AH		 1992 if (fc_host_permanent_port_name(shost) == -1)
1993 fc_host_permanent_port_name(shost) =
1994 fc_host_port_name(shost);
1995 if (bottom->fc_topology == FSF_TOPO_P2P) {
1996 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
1997 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
1998 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
1999 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
2000 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
2001 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
2002 else if (bottom->fc_topology == FSF_TOPO_AL)
2003 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
2004 else
2005 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4 2006 } else {
13e1e1f0
AH		 2007 fc_host_node_name(shost) = 0;
2008 fc_host_port_name(shost) = 0;
2009 fc_host_port_id(shost) = 0;
2010 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
ad757cdf 2011 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4
LT		 2012 adapter->hydra_version = 0;
2013 }
2014
aef4a983 2015 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
1da177e4 2016 adapter->hardware_version = bottom->hardware_version;
13e1e1f0
AH		 2017 memcpy(fc_host_serial_number(shost), bottom->serial_number,
2018 min(FC_SERIAL_NUMBER_SIZE, 17));
2019 EBCASC(fc_host_serial_number(shost),
2020 min(FC_SERIAL_NUMBER_SIZE, 17));
1da177e4
LT		 2021 }
2022
ec258fe4
SS		 2023 if (fsf_req->erp_action)
2024 ZFCP_LOG_NORMAL("The adapter %s reported the following "
2025 "characteristics:\n"
2026 "WWNN 0x%016Lx, WWPN 0x%016Lx, "
2027 "S_ID 0x%06x,\n"
2028 "adapter version 0x%x, "
2029 "LIC version 0x%x, "
2030 "FC link speed %d Gb/s\n",
2031 zfcp_get_busid_by_adapter(adapter),
2032 (wwn_t) fc_host_node_name(shost),
2033 (wwn_t) fc_host_port_name(shost),
2034 fc_host_port_id(shost),
2035 adapter->hydra_version,
2036 adapter->fsf_lic_version,
2037 fc_host_speed(shost));
1da177e4
LT		 2038 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2039 ZFCP_LOG_NORMAL("error: the adapter %s "
2040 "only supports newer control block "
2041 "versions in comparison to this device "
2042 "driver (try updated device driver)\n",
2043 zfcp_get_busid_by_adapter(adapter));
1f6f7129 2044 zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
1da177e4
LT		 2045 return -EIO;
2046 }
2047 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2048 ZFCP_LOG_NORMAL("error: the adapter %s "
2049 "only supports older control block "
2050 "versions than this device driver uses"
2051 "(consider a microcode upgrade)\n",
2052 zfcp_get_busid_by_adapter(adapter));
1f6f7129 2053 zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
1da177e4
LT		 2054 return -EIO;
2055 }
2056 return 0;
2057}
2058
52ef11a7 2059/**
1da177e4
LT		 2060 * function: zfcp_fsf_exchange_config_data_handler
2061 *
2062 * purpose: is called for finished Exchange Configuration Data command
2063 *
2064 * returns:
2065 */
2066static int
2067zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2068{
2069 struct fsf_qtcb_bottom_config *bottom;
2070 struct zfcp_adapter *adapter = fsf_req->adapter;
aef4a983 2071 struct fsf_qtcb *qtcb = fsf_req->qtcb;
1da177e4
LT		 2072
2073 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2074 return -EIO;
2075
aef4a983 2076 switch (qtcb->header.fsf_status) {
1da177e4
LT		 2077
2078 case FSF_GOOD:
1da177e4
LT		 2079 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2080 return -EIO;
2081
ad757cdf
AH		 2082 switch (fc_host_port_type(adapter->scsi_host)) {
2083 case FC_PORTTYPE_PTP:
6f71d9bc 2084 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2085 "configuration detected at adapter %s\n"
2086 "Peer WWNN 0x%016llx, "
2087 "peer WWPN 0x%016llx, "
2088 "peer d_id 0x%06x\n",
2089 zfcp_get_busid_by_adapter(adapter),
2090 adapter->peer_wwnn,
2091 adapter->peer_wwpn,
2092 adapter->peer_d_id);
6f71d9bc 2093 break;
ad757cdf 2094 case FC_PORTTYPE_NLPORT:
1da177e4
LT		 2095 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2096 "topology detected at adapter %s "
2097 "unsupported, shutting down adapter\n",
2098 zfcp_get_busid_by_adapter(adapter));
1f6f7129 2099 zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
1da177e4 2100 return -EIO;
ad757cdf 2101 case FC_PORTTYPE_NPORT:
ec258fe4
SS		 2102 if (fsf_req->erp_action)
2103 ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
2104 "network detected at adapter "
2105 "%s.\n",
52ef11a7 2106 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 2107 break;
2108 default:
2109 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2110 "reported by the exchange "
2111 "configuration command for "
2112 "the adapter %s is not "
2113 "of a type known to the zfcp "
2114 "driver, shutting down adapter\n",
2115 zfcp_get_busid_by_adapter(adapter));
1f6f7129 2116 zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
1da177e4
LT		 2117 return -EIO;
2118 }
aef4a983 2119 bottom = &qtcb->bottom.config;
1da177e4
LT		 2120 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2121 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2122 "allowed by the adapter %s "
2123 "is lower than the minimum "
2124 "required by the driver (%ld bytes).\n",
2125 bottom->max_qtcb_size,
2126 zfcp_get_busid_by_adapter(adapter),
2127 sizeof(struct fsf_qtcb));
1f6f7129 2128 zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
1da177e4
LT		 2129 return -EIO;
2130 }
2131 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2132 &adapter->status);
2133 break;
2134 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
1da177e4
LT		 2135 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2136 return -EIO;
2137
52ef11a7
SS		 2138 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2139 &adapter->status);
aef4a983 2140
698ec016 2141 zfcp_fsf_link_down_info_eval(fsf_req, 42,
aef4a983 2142 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4
LT		 2143 break;
2144 default:
1f6f7129 2145 zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
1da177e4
LT		 2146 return -EIO;
2147 }
2148 return 0;
2149}
2150
2151/**
2152 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 2153 * @erp_action: ERP action for the adapter for which port data is requested
1da177e4
LT		 2154 */
2155int
52ef11a7 2156zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4
LT		 2157{
2158 volatile struct qdio_buffer_element *sbale;
52ef11a7
SS		 2159 struct zfcp_fsf_req *fsf_req;
2160 struct zfcp_adapter *adapter = erp_action->adapter;
2abbe866 2161 unsigned long lock_flags;
52ef11a7 2162 int retval;
1da177e4 2163
aef4a983 2164 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
1da177e4 2165 ZFCP_LOG_INFO("error: exchange port data "
52ef11a7 2166 "command not supported by adapter %s\n",
1da177e4 2167 zfcp_get_busid_by_adapter(adapter));
52ef11a7
SS		 2168 return -EOPNOTSUPP;
2169 }
1da177e4 2170
1da177e4
LT		 2171 /* setup new FSF request */
2172 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
52ef11a7
SS		 2173 ZFCP_REQ_AUTO_CLEANUP,
2174 adapter->pool.fsf_req_erp,
2175 &lock_flags, &fsf_req);
2176 if (retval) {
1da177e4 2177 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
ceb3dfba 2178 "exchange port data request for "
52ef11a7 2179 "the adapter %s.\n",
1da177e4
LT		 2180 zfcp_get_busid_by_adapter(adapter));
2181 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2182 lock_flags);
2448c459 2183 return retval;
aef4a983
MS		 2184 }
2185
e891bffe 2186 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
52ef11a7
SS		 2187 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2188 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2189
52ef11a7
SS		 2190 erp_action->fsf_req = fsf_req;
2191 fsf_req->erp_action = erp_action;
2192 zfcp_erp_start_timer(fsf_req);
1da177e4 2193
2abbe866 2194 retval = zfcp_fsf_req_send(fsf_req);
52ef11a7
SS		 2195 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
2196
1da177e4
LT		 2197 if (retval) {
2198 ZFCP_LOG_INFO("error: Could not send an exchange port data "
52ef11a7 2199 "command on the adapter %s\n",
1da177e4
LT		 2200 zfcp_get_busid_by_adapter(adapter));
2201 zfcp_fsf_req_free(fsf_req);
52ef11a7
SS		 2202 erp_action->fsf_req = NULL;
2203 }
2204 else
2205 ZFCP_LOG_DEBUG("exchange port data request initiated "
2206 "(adapter %s)\n",
2207 zfcp_get_busid_by_adapter(adapter));
2208 return retval;
2209}
2210
2211
2212/**
2213 * zfcp_fsf_exchange_port_data_sync - request information about local port
2214 * and wait until information is ready
2215 */
2216int
2217zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
2218 struct fsf_qtcb_bottom_port *data)
2219{
2220 volatile struct qdio_buffer_element *sbale;
2221 struct zfcp_fsf_req *fsf_req;
2222 unsigned long lock_flags;
2223 int retval;
2224
2225 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
2226 ZFCP_LOG_INFO("error: exchange port data "
2227 "command not supported by adapter %s\n",
2228 zfcp_get_busid_by_adapter(adapter));
2229 return -EOPNOTSUPP;
2230 }
2231
2232 /* setup new FSF request */
2233 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2234 0, NULL, &lock_flags, &fsf_req);
2235 if (retval) {
2236 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
ceb3dfba 2237 "exchange port data request for "
52ef11a7
SS		 2238 "the adapter %s.\n",
2239 zfcp_get_busid_by_adapter(adapter));
1da177e4
LT		 2240 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2241 lock_flags);
2448c459 2242 return retval;
1da177e4
LT		 2243 }
2244
52ef11a7
SS		 2245 if (data)
2246 fsf_req->data = (unsigned long) data;
2247
e891bffe 2248 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
52ef11a7
SS		 2249 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2250 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2251
2252 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2253 retval = zfcp_fsf_req_send(fsf_req);
2448c459 2254 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1da177e4 2255
52ef11a7
SS		 2256 if (retval)
2257 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2258 "command on the adapter %s\n",
2259 zfcp_get_busid_by_adapter(adapter));
2260 else
2448c459
AH		 2261 wait_event(fsf_req->completion_wq,
2262 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7
SS		 2263
2264 zfcp_fsf_req_free(fsf_req);
2265
1da177e4
LT		 2266 return retval;
2267}
2268
2f8f3ed5
AH		 2269/**
2270 * zfcp_fsf_exchange_port_evaluate
2271 * @fsf_req: fsf_req which belongs to xchg port data request
2272 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
2273 */
2274static void
2275zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2276{
2277 struct zfcp_adapter *adapter;
52ef11a7 2278 struct fsf_qtcb_bottom_port *bottom;
2f8f3ed5
AH		 2279 struct Scsi_Host *shost;
2280
2281 adapter = fsf_req->adapter;
52ef11a7 2282 bottom = &fsf_req->qtcb->bottom.port;
2f8f3ed5
AH		 2283 shost = adapter->scsi_host;
2284
52ef11a7
SS		 2285 if (fsf_req->data)
2286 memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
2287 sizeof(struct fsf_qtcb_bottom_port));
2f8f3ed5
AH		 2288
2289 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
2290 fc_host_permanent_port_name(shost) = bottom->wwpn;
2291 else
2292 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
2293 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
2294 fc_host_supported_speeds(shost) = bottom->supported_speed;
2295}
1da177e4
LT		 2296
2297/**
2298 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2299 * @fsf_req: pointer to struct zfcp_fsf_req
2300 */
2301static void
2302zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2303{
2f8f3ed5
AH		 2304 struct zfcp_adapter *adapter;
2305 struct fsf_qtcb *qtcb;
2306
2307 adapter = fsf_req->adapter;
2308 qtcb = fsf_req->qtcb;
1da177e4
LT		 2309
2310 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2311 return;
2312
aef4a983 2313 switch (qtcb->header.fsf_status) {
1da177e4 2314 case FSF_GOOD:
2f8f3ed5 2315 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
aef4a983 2316 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
aef4a983 2317 break;
aef4a983 2318 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2f8f3ed5 2319 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
aef4a983 2320 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
698ec016 2321 zfcp_fsf_link_down_info_eval(fsf_req, 43,
aef4a983 2322 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 2323 break;
1da177e4
LT		 2324 }
2325}
2326
2327
2328/*
2329 * function: zfcp_fsf_open_port
2330 *
41fa2ada 2331 * purpose:
1da177e4
LT		 2332 *
2333 * returns: address of initiated FSF request
41fa2ada 2334 * NULL - request could not be initiated
1da177e4
LT		 2335 */
2336int
2337zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2338{
2339 volatile struct qdio_buffer_element *sbale;
2abbe866 2340 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2341 unsigned long lock_flags;
2342 int retval = 0;
2343
2344 /* setup new FSF request */
2345 retval = zfcp_fsf_req_create(erp_action->adapter,
2346 FSF_QTCB_OPEN_PORT_WITH_DID,
2347 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2348 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2349 &lock_flags, &fsf_req);
1da177e4
LT		 2350 if (retval < 0) {
2351 ZFCP_LOG_INFO("error: Could not create open port request "
2352 "for port 0x%016Lx on adapter %s.\n",
2353 erp_action->port->wwpn,
2354 zfcp_get_busid_by_adapter(erp_action->adapter));
2355 goto out;
2356 }
2357
e891bffe 2358 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 2359 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2360 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2361
2abbe866 2362 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1da177e4 2363 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2abbe866
AH		 2364 fsf_req->data = (unsigned long) erp_action->port;
2365 fsf_req->erp_action = erp_action;
2366 erp_action->fsf_req = fsf_req;
1da177e4 2367
2abbe866
AH		 2368 zfcp_erp_start_timer(fsf_req);
2369 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2370 if (retval) {
2371 ZFCP_LOG_INFO("error: Could not send open port request for "
2372 "port 0x%016Lx on adapter %s.\n",
2373 erp_action->port->wwpn,
2374 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 2375 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2376 erp_action->fsf_req = NULL;
2377 goto out;
2378 }
2379
2380 ZFCP_LOG_DEBUG("open port request initiated "
2381 "(adapter %s, port 0x%016Lx)\n",
2382 zfcp_get_busid_by_adapter(erp_action->adapter),
2383 erp_action->port->wwpn);
2384 out:
2385 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2386 lock_flags);
2387 return retval;
2388}
2389
2390/*
2391 * function: zfcp_fsf_open_port_handler
2392 *
2393 * purpose: is called for finished Open Port command
2394 *
41fa2ada 2395 * returns:
1da177e4
LT		 2396 */
2397static int
2398zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2399{
2400 int retval = -EINVAL;
2401 struct zfcp_port *port;
2402 struct fsf_plogi *plogi;
2403 struct fsf_qtcb_header *header;
2404 u16 subtable, rule, counter;
2405
059c97d0 2406 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2407 header = &fsf_req->qtcb->header;
2408
2409 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2410 /* don't change port status in our bookkeeping */
2411 goto skip_fsfstatus;
2412 }
2413
2414 /* evaluate FSF status in QTCB */
2415 switch (header->fsf_status) {
2416
2417 case FSF_PORT_ALREADY_OPEN:
1da177e4
LT		 2418 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2419 "is already open.\n",
2420 port->wwpn, zfcp_get_busid_by_port(port));
1da177e4
LT		 2421 /*
2422 * This is a bug, however operation should continue normally
2423 * if it is simply ignored
2424 */
2425 break;
2426
2427 case FSF_ACCESS_DENIED:
1da177e4
LT		 2428 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2429 "on adapter %s\n",
2430 port->wwpn, zfcp_get_busid_by_port(port));
2431 for (counter = 0; counter < 2; counter++) {
2432 subtable = header->fsf_status_qual.halfword[counter * 2];
2433 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2434 switch (subtable) {
2435 case FSF_SQ_CFDC_SUBTABLE_OS:
2436 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2437 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2438 case FSF_SQ_CFDC_SUBTABLE_LUN:
2439 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2440 zfcp_act_subtable_type[subtable], rule);
2441 break;
2442 }
2443 }
1f6f7129 2444 zfcp_erp_port_access_denied(port, 57, fsf_req);
1da177e4
LT		 2445 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2446 break;
2447
2448 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1da177e4
LT		 2449 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2450 "The remote port 0x%016Lx on adapter %s "
2451 "could not be opened. Disabling it.\n",
2452 port->wwpn, zfcp_get_busid_by_port(port));
1f6f7129 2453 zfcp_erp_port_failed(port, 31, fsf_req);
1da177e4
LT		 2454 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2455 break;
2456
2457 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2458 switch (header->fsf_status_qual.word[0]) {
2459 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2460 /* ERP strategy will escalate */
2461 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2462 break;
2463 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2464 /* ERP strategy will escalate */
1da177e4
LT		 2465 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2466 break;
2467 case FSF_SQ_NO_RETRY_POSSIBLE:
1da177e4
LT		 2468 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2469 "adapter %s could not be opened. "
2470 "Disabling it.\n",
2471 port->wwpn,
2472 zfcp_get_busid_by_port(port));
1f6f7129 2473 zfcp_erp_port_failed(port, 32, fsf_req);
1da177e4
LT		 2474 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2475 break;
2476 default:
2477 ZFCP_LOG_NORMAL
2478 ("bug: Wrong status qualifier 0x%x arrived.\n",
2479 header->fsf_status_qual.word[0]);
1da177e4
LT		 2480 break;
2481 }
2482 break;
2483
2484 case FSF_GOOD:
1da177e4
LT		 2485 /* save port handle assigned by FSF */
2486 port->handle = header->port_handle;
2487 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2488 "was opened, it's port handle is 0x%x\n",
2489 port->wwpn, zfcp_get_busid_by_port(port),
2490 port->handle);
2491 /* mark port as open */
2492 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2493 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 2494 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2495 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2496 &port->status);
1da177e4
LT		 2497 retval = 0;
2498 /* check whether D_ID has changed during open */
2499 /*
2500 * FIXME: This check is not airtight, as the FCP channel does
2501 * not monitor closures of target port connections caused on
2502 * the remote side. Thus, they might miss out on invalidating
2503 * locally cached WWPNs (and other N_Port parameters) of gone
2504 * target ports. So, our heroic attempt to make things safe
2505 * could be undermined by 'open port' response data tagged with
2506 * obsolete WWPNs. Another reason to monitor potential
2507 * connection closures ourself at least (by interpreting
2508 * incoming ELS' and unsolicited status). It just crosses my
2509 * mind that one should be able to cross-check by means of
2510 * another GID_PN straight after a port has been opened.
2511 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2512 */
2513 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2514 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2515 {
2516 if (fsf_req->qtcb->bottom.support.els1_length <
75bfc283 2517 sizeof (struct fsf_plogi)) {
1da177e4
LT		 2518 ZFCP_LOG_INFO(
2519 "warning: insufficient length of "
2520 "PLOGI payload (%i)\n",
2521 fsf_req->qtcb->bottom.support.els1_length);
1da177e4
LT		 2522 /* skip sanity check and assume wwpn is ok */
2523 } else {
2524 if (plogi->serv_param.wwpn != port->wwpn) {
2525 ZFCP_LOG_INFO("warning: d_id of port "
2526 "0x%016Lx changed during "
2527 "open\n", port->wwpn);
1da177e4
LT		 2528 atomic_clear_mask(
2529 ZFCP_STATUS_PORT_DID_DID,
2530 &port->status);
75bfc283 2531 } else {
1da177e4 2532 port->wwnn = plogi->serv_param.wwnn;
24073b47 2533 zfcp_fc_plogi_evaluate(port, plogi);
75bfc283 2534 }
1da177e4
LT		 2535 }
2536 }
2537 break;
2538
2539 case FSF_UNKNOWN_OP_SUBTYPE:
2540 /* should never occure, subtype not set in zfcp_fsf_open_port */
1da177e4
LT		 2541 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2542 "op_subtype=0x%x)\n",
2543 zfcp_get_busid_by_port(port),
2544 fsf_req->qtcb->bottom.support.operation_subtype);
2545 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2546 break;
2547
2548 default:
2549 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2550 "(debug info 0x%x)\n",
2551 header->fsf_status);
1da177e4
LT		 2552 break;
2553 }
2554
2555 skip_fsfstatus:
2556 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2557 return retval;
2558}
2559
2560/*
2561 * function: zfcp_fsf_close_port
2562 *
2563 * purpose: submit FSF command "close port"
2564 *
2565 * returns: address of initiated FSF request
2566 * NULL - request could not be initiated
2567 */
2568int
2569zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2570{
2571 volatile struct qdio_buffer_element *sbale;
2abbe866 2572 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2573 unsigned long lock_flags;
2574 int retval = 0;
2575
2576 /* setup new FSF request */
2577 retval = zfcp_fsf_req_create(erp_action->adapter,
2578 FSF_QTCB_CLOSE_PORT,
2579 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2580 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2581 &lock_flags, &fsf_req);
1da177e4
LT		 2582 if (retval < 0) {
2583 ZFCP_LOG_INFO("error: Could not create a close port request "
2584 "for port 0x%016Lx on adapter %s.\n",
2585 erp_action->port->wwpn,
2586 zfcp_get_busid_by_adapter(erp_action->adapter));
2587 goto out;
2588 }
2589
e891bffe 2590 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 2591 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2592 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2593
2594 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2abbe866
AH		 2595 fsf_req->data = (unsigned long) erp_action->port;
2596 fsf_req->erp_action = erp_action;
2597 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2598 fsf_req->erp_action = erp_action;
2599 erp_action->fsf_req = fsf_req;
2600
2601 zfcp_erp_start_timer(fsf_req);
2602 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2603 if (retval) {
2604 ZFCP_LOG_INFO("error: Could not send a close port request for "
2605 "port 0x%016Lx on adapter %s.\n",
2606 erp_action->port->wwpn,
2607 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 2608 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2609 erp_action->fsf_req = NULL;
2610 goto out;
2611 }
2612
2613 ZFCP_LOG_TRACE("close port request initiated "
2614 "(adapter %s, port 0x%016Lx)\n",
2615 zfcp_get_busid_by_adapter(erp_action->adapter),
2616 erp_action->port->wwpn);
2617 out:
2618 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2619 lock_flags);
2620 return retval;
2621}
2622
2623/*
2624 * function: zfcp_fsf_close_port_handler
2625 *
2626 * purpose: is called for finished Close Port FSF command
2627 *
2628 * returns:
2629 */
2630static int
2631zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2632{
2633 int retval = -EINVAL;
2634 struct zfcp_port *port;
2635
059c97d0 2636 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2637
2638 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2639 /* don't change port status in our bookkeeping */
2640 goto skip_fsfstatus;
2641 }
2642
2643 /* evaluate FSF status in QTCB */
2644 switch (fsf_req->qtcb->header.fsf_status) {
2645
2646 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2647 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2648 "0x%016Lx on adapter %s invalid. This may happen "
2649 "occasionally.\n", port->handle,
2650 port->wwpn, zfcp_get_busid_by_port(port));
2651 ZFCP_LOG_DEBUG("status qualifier:\n");
2652 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2653 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2654 sizeof (union fsf_status_qual));
1f6f7129 2655 zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
1da177e4
LT		 2656 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2657 break;
2658
2659 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2660 /* Note: FSF has actually closed the port in this case.
2661 * The status code is just daft. Fingers crossed for a change
2662 */
2663 retval = 0;
2664 break;
2665
2666 case FSF_GOOD:
1da177e4
LT		 2667 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2668 "port handle 0x%x\n", port->wwpn,
2669 zfcp_get_busid_by_port(port), port->handle);
1f6f7129 2670 zfcp_erp_modify_port_status(port, 33, fsf_req,
1da177e4
LT		 2671 ZFCP_STATUS_COMMON_OPEN,
2672 ZFCP_CLEAR);
2673 retval = 0;
2674 break;
2675
2676 default:
2677 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2678 "(debug info 0x%x)\n",
2679 fsf_req->qtcb->header.fsf_status);
1da177e4
LT		 2680 break;
2681 }
2682
2683 skip_fsfstatus:
2684 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2685 return retval;
2686}
2687
2688/*
2689 * function: zfcp_fsf_close_physical_port
2690 *
2691 * purpose: submit FSF command "close physical port"
2692 *
2693 * returns: address of initiated FSF request
2694 * NULL - request could not be initiated
2695 */
2696int
2697zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2698{
1da177e4 2699 volatile struct qdio_buffer_element *sbale;
2abbe866
AH		 2700 struct zfcp_fsf_req *fsf_req;
2701 unsigned long lock_flags;
2702 int retval = 0;
1da177e4
LT		 2703
2704 /* setup new FSF request */
2705 retval = zfcp_fsf_req_create(erp_action->adapter,
2706 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2707 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2708 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2709 &lock_flags, &fsf_req);
1da177e4
LT		 2710 if (retval < 0) {
2711 ZFCP_LOG_INFO("error: Could not create close physical port "
2712 "request (adapter %s, port 0x%016Lx)\n",
2713 zfcp_get_busid_by_adapter(erp_action->adapter),
2714 erp_action->port->wwpn);
2715
2716 goto out;
2717 }
2718
e891bffe 2719 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 2720 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2721 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2722
2723 /* mark port as being closed */
2724 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2725 &erp_action->port->status);
2726 /* save a pointer to this port */
2abbe866
AH		 2727 fsf_req->data = (unsigned long) erp_action->port;
2728 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2729 fsf_req->erp_action = erp_action;
2730 erp_action->fsf_req = fsf_req;
2731
2732 zfcp_erp_start_timer(fsf_req);
2733 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 2734 if (retval) {
2735 ZFCP_LOG_INFO("error: Could not send close physical port "
2736 "request (adapter %s, port 0x%016Lx)\n",
2737 zfcp_get_busid_by_adapter(erp_action->adapter),
2738 erp_action->port->wwpn);
2abbe866 2739 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2740 erp_action->fsf_req = NULL;
2741 goto out;
2742 }
2743
2744 ZFCP_LOG_TRACE("close physical port request initiated "
2745 "(adapter %s, port 0x%016Lx)\n",
2746 zfcp_get_busid_by_adapter(erp_action->adapter),
2747 erp_action->port->wwpn);
2748 out:
2749 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2750 lock_flags);
2751 return retval;
2752}
2753
2754/*
2755 * function: zfcp_fsf_close_physical_port_handler
2756 *
2757 * purpose: is called for finished Close Physical Port FSF command
2758 *
2759 * returns:
2760 */
2761static int
2762zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2763{
2764 int retval = -EINVAL;
2765 struct zfcp_port *port;
2766 struct zfcp_unit *unit;
2767 struct fsf_qtcb_header *header;
2768 u16 subtable, rule, counter;
2769
059c97d0 2770 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2771 header = &fsf_req->qtcb->header;
2772
2773 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2774 /* don't change port status in our bookkeeping */
2775 goto skip_fsfstatus;
2776 }
2777
2778 /* evaluate FSF status in QTCB */
2779 switch (header->fsf_status) {
2780
2781 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2782 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2783 "(adapter %s, port 0x%016Lx). "
2784 "This may happen occasionally.\n",
2785 port->handle,
2786 zfcp_get_busid_by_port(port),
2787 port->wwpn);
2788 ZFCP_LOG_DEBUG("status qualifier:\n");
2789 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2790 (char *) &header->fsf_status_qual,
2791 sizeof (union fsf_status_qual));
1f6f7129 2792 zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
1da177e4
LT		 2793 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2794 break;
2795
2796 case FSF_ACCESS_DENIED:
1da177e4
LT		 2797 ZFCP_LOG_NORMAL("Access denied, cannot close "
2798 "physical port 0x%016Lx on adapter %s\n",
2799 port->wwpn, zfcp_get_busid_by_port(port));
2800 for (counter = 0; counter < 2; counter++) {
2801 subtable = header->fsf_status_qual.halfword[counter * 2];
2802 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2803 switch (subtable) {
2804 case FSF_SQ_CFDC_SUBTABLE_OS:
2805 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2806 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2807 case FSF_SQ_CFDC_SUBTABLE_LUN:
2808 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2809 zfcp_act_subtable_type[subtable], rule);
2810 break;
2811 }
2812 }
1f6f7129 2813 zfcp_erp_port_access_denied(port, 58, fsf_req);
1da177e4
LT		 2814 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2815 break;
2816
2817 case FSF_PORT_BOXED:
1da177e4
LT		 2818 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2819 "%s needs to be reopened but it was attempted "
2820 "to close it physically.\n",
2821 port->wwpn,
2822 zfcp_get_busid_by_port(port));
1f6f7129 2823 zfcp_erp_port_boxed(port, 50, fsf_req);
1da177e4
LT		 2824 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2825 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 2826
2827 /* can't use generic zfcp_erp_modify_port_status because
2828 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2829 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2830 list_for_each_entry(unit, &port->unit_list_head, list)
2831 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
2832 &unit->status);
1da177e4
LT		 2833 break;
2834
2835 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2836 switch (header->fsf_status_qual.word[0]) {
2837 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2838 /* This will now be escalated by ERP */
2839 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2840 break;
2841 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 2842 /* ERP strategy will escalate */
1da177e4
LT		 2843 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2844 break;
2845 default:
2846 ZFCP_LOG_NORMAL
2847 ("bug: Wrong status qualifier 0x%x arrived.\n",
2848 header->fsf_status_qual.word[0]);
1da177e4
LT		 2849 break;
2850 }
2851 break;
2852
2853 case FSF_GOOD:
1da177e4
LT		 2854 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2855 "physically closed, port handle 0x%x\n",
2856 port->wwpn,
2857 zfcp_get_busid_by_port(port), port->handle);
2858 /* can't use generic zfcp_erp_modify_port_status because
2859 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2860 */
2861 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2862 list_for_each_entry(unit, &port->unit_list_head, list)
2863 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2864 retval = 0;
2865 break;
2866
2867 default:
2868 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2869 "(debug info 0x%x)\n",
2870 header->fsf_status);
1da177e4
LT		 2871 break;
2872 }
2873
2874 skip_fsfstatus:
2875 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2876 return retval;
2877}
2878
2879/*
2880 * function: zfcp_fsf_open_unit
2881 *
2882 * purpose:
2883 *
2884 * returns:
2885 *
2886 * assumptions: This routine does not check whether the associated
2887 * remote port has already been opened. This should be
2888 * done by calling routines. Otherwise some status
2889 * may be presented by FSF
2890 */
2891int
2892zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2893{
2894 volatile struct qdio_buffer_element *sbale;
2abbe866 2895 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2896 unsigned long lock_flags;
2897 int retval = 0;
2898
2899 /* setup new FSF request */
2900 retval = zfcp_fsf_req_create(erp_action->adapter,
2901 FSF_QTCB_OPEN_LUN,
2902 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2903 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2904 &lock_flags, &fsf_req);
1da177e4
LT		 2905 if (retval < 0) {
2906 ZFCP_LOG_INFO("error: Could not create open unit request for "
2907 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
2908 erp_action->unit->fcp_lun,
2909 erp_action->unit->port->wwpn,
2910 zfcp_get_busid_by_adapter(erp_action->adapter));
2911 goto out;
2912 }
2913
e891bffe 2914 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 2915 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2916 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2917
2abbe866
AH		 2918 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2919 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
aef4a983 2920 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2abbe866 2921 fsf_req->qtcb->bottom.support.option =
06506d00 2922 FSF_OPEN_LUN_SUPPRESS_BOXING;
1da177e4 2923 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2abbe866
AH		 2924 fsf_req->data = (unsigned long) erp_action->unit;
2925 fsf_req->erp_action = erp_action;
2926 erp_action->fsf_req = fsf_req;
1da177e4 2927
2abbe866
AH		 2928 zfcp_erp_start_timer(fsf_req);
2929 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4
LT		 2930 if (retval) {
2931 ZFCP_LOG_INFO("error: Could not send an open unit request "
2932 "on the adapter %s, port 0x%016Lx for "
2933 "unit 0x%016Lx\n",
2934 zfcp_get_busid_by_adapter(erp_action->adapter),
2935 erp_action->port->wwpn,
2936 erp_action->unit->fcp_lun);
2abbe866 2937 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2938 erp_action->fsf_req = NULL;
2939 goto out;
2940 }
2941
2942 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
2943 "port 0x%016Lx, unit 0x%016Lx)\n",
2944 zfcp_get_busid_by_adapter(erp_action->adapter),
2945 erp_action->port->wwpn, erp_action->unit->fcp_lun);
2946 out:
2947 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2948 lock_flags);
2949 return retval;
2950}
2951
2952/*
2953 * function: zfcp_fsf_open_unit_handler
2954 *
2955 * purpose: is called for finished Open LUN command
2956 *
41fa2ada 2957 * returns:
1da177e4
LT		 2958 */
2959static int
2960zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2961{
2962 int retval = -EINVAL;
2963 struct zfcp_adapter *adapter;
2964 struct zfcp_unit *unit;
2965 struct fsf_qtcb_header *header;
2966 struct fsf_qtcb_bottom_support *bottom;
2967 struct fsf_queue_designator *queue_designator;
2968 u16 subtable, rule, counter;
aef4a983 2969 int exclusive, readwrite;
1da177e4 2970
059c97d0 2971 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 2972
2973 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2974 /* don't change unit status in our bookkeeping */
2975 goto skip_fsfstatus;
2976 }
2977
2978 adapter = fsf_req->adapter;
2979 header = &fsf_req->qtcb->header;
2980 bottom = &fsf_req->qtcb->bottom.support;
2981 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2982
1da177e4 2983 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 2984 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 2985 ZFCP_STATUS_UNIT_SHARED |
2986 ZFCP_STATUS_UNIT_READONLY,
2987 &unit->status);
2988
2989 /* evaluate FSF status in QTCB */
2990 switch (header->fsf_status) {
2991
2992 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 2993 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
2994 "for port 0x%016Lx on adapter %s invalid "
2995 "This may happen occasionally\n",
2996 unit->port->handle,
2997 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
2998 ZFCP_LOG_DEBUG("status qualifier:\n");
2999 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3000 (char *) &header->fsf_status_qual,
3001 sizeof (union fsf_status_qual));
1f6f7129 3002 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
1da177e4
LT		 3003 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3004 break;
3005
3006 case FSF_LUN_ALREADY_OPEN:
1da177e4
LT		 3007 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3008 "remote port 0x%016Lx on adapter %s twice.\n",
3009 unit->fcp_lun,
3010 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
1da177e4
LT		 3011 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3012 break;
3013
3014 case FSF_ACCESS_DENIED:
1da177e4
LT		 3015 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3016 "remote port 0x%016Lx on adapter %s\n",
3017 unit->fcp_lun, unit->port->wwpn,
3018 zfcp_get_busid_by_unit(unit));
3019 for (counter = 0; counter < 2; counter++) {
3020 subtable = header->fsf_status_qual.halfword[counter * 2];
3021 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3022 switch (subtable) {
3023 case FSF_SQ_CFDC_SUBTABLE_OS:
3024 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3025 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3026 case FSF_SQ_CFDC_SUBTABLE_LUN:
3027 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3028 zfcp_act_subtable_type[subtable], rule);
3029 break;
3030 }
3031 }
1f6f7129 3032 zfcp_erp_unit_access_denied(unit, 59, fsf_req);
1da177e4
LT		 3033 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3034 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3035 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3036 break;
3037
3038 case FSF_PORT_BOXED:
1da177e4
LT		 3039 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3040 "needs to be reopened\n",
3041 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
1f6f7129 3042 zfcp_erp_port_boxed(unit->port, 51, fsf_req);
1da177e4
LT		 3043 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3044 ZFCP_STATUS_FSFREQ_RETRY;
3045 break;
3046
3047 case FSF_LUN_SHARING_VIOLATION:
1da177e4
LT		 3048 if (header->fsf_status_qual.word[0] != 0) {
3049 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3050 "with WWPN 0x%Lx "
3051 "connected to the adapter %s "
3052 "is already in use in LPAR%d, CSS%d\n",
3053 unit->fcp_lun,
3054 unit->port->wwpn,
3055 zfcp_get_busid_by_unit(unit),
3056 queue_designator->hla,
3057 queue_designator->cssid);
3058 } else {
3059 subtable = header->fsf_status_qual.halfword[4];
3060 rule = header->fsf_status_qual.halfword[5];
3061 switch (subtable) {
3062 case FSF_SQ_CFDC_SUBTABLE_OS:
3063 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3064 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3065 case FSF_SQ_CFDC_SUBTABLE_LUN:
3066 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3067 "remote port with WWPN 0x%Lx "
3068 "connected to the adapter %s "
3069 "is denied (%s rule %d)\n",
3070 unit->fcp_lun,
3071 unit->port->wwpn,
3072 zfcp_get_busid_by_unit(unit),
3073 zfcp_act_subtable_type[subtable],
3074 rule);
3075 break;
3076 }
3077 }
3078 ZFCP_LOG_DEBUG("status qualifier:\n");
3079 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3080 (char *) &header->fsf_status_qual,
3081 sizeof (union fsf_status_qual));
1f6f7129 3082 zfcp_erp_unit_access_denied(unit, 60, fsf_req);
1da177e4
LT		 3083 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3084 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3085 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3086 break;
3087
3088 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1da177e4
LT		 3089 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3090 "There is no handle (temporary port identifier) "
3091 "available for unit 0x%016Lx on port 0x%016Lx "
3092 "on adapter %s\n",
3093 unit->fcp_lun,
3094 unit->port->wwpn,
3095 zfcp_get_busid_by_unit(unit));
1f6f7129 3096 zfcp_erp_unit_failed(unit, 34, fsf_req);
1da177e4
LT		 3097 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3098 break;
3099
3100 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3101 switch (header->fsf_status_qual.word[0]) {
3102 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 3103 /* Re-establish link to port */
65a8d4e1 3104 zfcp_test_link(unit->port);
1da177e4
LT		 3105 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3106 break;
3107 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 3108 /* ERP strategy will escalate */
1da177e4
LT		 3109 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3110 break;
3111 default:
3112 ZFCP_LOG_NORMAL
3113 ("bug: Wrong status qualifier 0x%x arrived.\n",
3114 header->fsf_status_qual.word[0]);
1da177e4
LT		 3115 }
3116 break;
3117
3118 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 3119 ZFCP_LOG_NORMAL(
3120 "Invalid option 0x%x has been specified "
3121 "in QTCB bottom sent to the adapter %s\n",
3122 bottom->option,
3123 zfcp_get_busid_by_adapter(adapter));
3124 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3125 retval = -EINVAL;
3126 break;
3127
3128 case FSF_GOOD:
1da177e4
LT		 3129 /* save LUN handle assigned by FSF */
3130 unit->handle = header->lun_handle;
3131 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3132 "adapter %s opened, port handle 0x%x\n",
3133 unit->fcp_lun,
3134 unit->port->wwpn,
3135 zfcp_get_busid_by_unit(unit),
3136 unit->handle);
3137 /* mark unit as open */
3138 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 3139
3140 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
3141 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
3142 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
3143 exclusive = (bottom->lun_access_info &
3144 FSF_UNIT_ACCESS_EXCLUSIVE);
3145 readwrite = (bottom->lun_access_info &
3146 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
3147
1da177e4
LT		 3148 if (!exclusive)
3149 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3150 &unit->status);
3151
3152 if (!readwrite) {
3153 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3154 &unit->status);
3155 ZFCP_LOG_NORMAL("read-only access for unit "
3156 "(adapter %s, wwpn=0x%016Lx, "
3157 "fcp_lun=0x%016Lx)\n",
3158 zfcp_get_busid_by_unit(unit),
3159 unit->port->wwpn,
3160 unit->fcp_lun);
3161 }
3162
3163 if (exclusive && !readwrite) {
3164 ZFCP_LOG_NORMAL("exclusive access of read-only "
3165 "unit not supported\n");
1f6f7129 3166 zfcp_erp_unit_failed(unit, 35, fsf_req);
1da177e4 3167 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1f6f7129 3168 zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
1da177e4
LT		 3169 } else if (!exclusive && readwrite) {
3170 ZFCP_LOG_NORMAL("shared access of read-write "
3171 "unit not supported\n");
1f6f7129 3172 zfcp_erp_unit_failed(unit, 36, fsf_req);
1da177e4 3173 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1f6f7129 3174 zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
1da177e4
LT		 3175 }
3176 }
3177
3178 retval = 0;
3179 break;
3180
3181 default:
3182 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3183 "(debug info 0x%x)\n",
3184 header->fsf_status);
1da177e4
LT		 3185 break;
3186 }
3187
3188 skip_fsfstatus:
3189 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3190 return retval;
3191}
3192
3193/*
3194 * function: zfcp_fsf_close_unit
3195 *
3196 * purpose:
3197 *
3198 * returns: address of fsf_req - request successfully initiated
41fa2ada 3199 * NULL -
1da177e4
LT		 3200 *
3201 * assumptions: This routine does not check whether the associated
3202 * remote port/lun has already been opened. This should be
3203 * done by calling routines. Otherwise some status
3204 * may be presented by FSF
3205 */
3206int
3207zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3208{
3209 volatile struct qdio_buffer_element *sbale;
2abbe866 3210 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 3211 unsigned long lock_flags;
3212 int retval = 0;
3213
3214 /* setup new FSF request */
3215 retval = zfcp_fsf_req_create(erp_action->adapter,
3216 FSF_QTCB_CLOSE_LUN,
3217 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3218 erp_action->adapter->pool.fsf_req_erp,
2abbe866 3219 &lock_flags, &fsf_req);
1da177e4
LT		 3220 if (retval < 0) {
3221 ZFCP_LOG_INFO("error: Could not create close unit request for "
3222 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3223 erp_action->unit->fcp_lun,
3224 erp_action->port->wwpn,
3225 zfcp_get_busid_by_adapter(erp_action->adapter));
3226 goto out;
3227 }
3228
e891bffe 3229 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 3230 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3231 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3232
2abbe866
AH		 3233 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
3234 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
1da177e4 3235 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
2abbe866
AH		 3236 fsf_req->data = (unsigned long) erp_action->unit;
3237 fsf_req->erp_action = erp_action;
3238 erp_action->fsf_req = fsf_req;
1da177e4 3239
2abbe866
AH		 3240 zfcp_erp_start_timer(fsf_req);
3241 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4
LT		 3242 if (retval) {
3243 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3244 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3245 erp_action->unit->fcp_lun,
3246 erp_action->port->wwpn,
3247 zfcp_get_busid_by_adapter(erp_action->adapter));
2abbe866 3248 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 3249 erp_action->fsf_req = NULL;
3250 goto out;
3251 }
3252
3253 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3254 "port 0x%016Lx, unit 0x%016Lx)\n",
3255 zfcp_get_busid_by_adapter(erp_action->adapter),
3256 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3257 out:
3258 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3259 lock_flags);
3260 return retval;
3261}
3262
3263/*
3264 * function: zfcp_fsf_close_unit_handler
3265 *
3266 * purpose: is called for finished Close LUN FSF command
3267 *
3268 * returns:
3269 */
3270static int
3271zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3272{
3273 int retval = -EINVAL;
3274 struct zfcp_unit *unit;
3275
059c97d0 3276 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 3277
3278 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3279 /* don't change unit status in our bookkeeping */
3280 goto skip_fsfstatus;
3281 }
3282
3283 /* evaluate FSF status in QTCB */
3284 switch (fsf_req->qtcb->header.fsf_status) {
3285
3286 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3287 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3288 "0x%016Lx on adapter %s invalid. This may "
3289 "happen in rare circumstances\n",
3290 unit->port->handle,
3291 unit->port->wwpn,
3292 zfcp_get_busid_by_unit(unit));
3293 ZFCP_LOG_DEBUG("status qualifier:\n");
3294 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3295 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3296 sizeof (union fsf_status_qual));
1f6f7129 3297 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
1da177e4
LT		 3298 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3299 break;
3300
3301 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3302 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3303 "0x%016Lx on port 0x%016Lx on adapter %s is "
3304 "invalid. This may happen occasionally.\n",
3305 unit->handle,
3306 unit->fcp_lun,
3307 unit->port->wwpn,
3308 zfcp_get_busid_by_unit(unit));
3309 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3310 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3311 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3312 sizeof (union fsf_status_qual));
1f6f7129 3313 zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
1da177e4
LT		 3314 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3315 break;
3316
3317 case FSF_PORT_BOXED:
1da177e4
LT		 3318 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3319 "needs to be reopened\n",
3320 unit->port->wwpn,
3321 zfcp_get_busid_by_unit(unit));
1f6f7129 3322 zfcp_erp_port_boxed(unit->port, 52, fsf_req);
1da177e4
LT		 3323 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3324 ZFCP_STATUS_FSFREQ_RETRY;
3325 break;
3326
3327 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3328 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3329 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 3330 /* re-establish link to port */
65a8d4e1 3331 zfcp_test_link(unit->port);
1da177e4
LT		 3332 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3333 break;
3334 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 3335 /* ERP strategy will escalate */
1da177e4
LT		 3336 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3337 break;
3338 default:
3339 ZFCP_LOG_NORMAL
3340 ("bug: Wrong status qualifier 0x%x arrived.\n",
3341 fsf_req->qtcb->header.fsf_status_qual.word[0]);
1da177e4
LT		 3342 break;
3343 }
3344 break;
3345
3346 case FSF_GOOD:
1da177e4
LT		 3347 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3348 "closed, port handle 0x%x\n",
3349 unit->fcp_lun,
3350 unit->port->wwpn,
3351 zfcp_get_busid_by_unit(unit),
3352 unit->handle);
3353 /* mark unit as closed */
3354 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3355 retval = 0;
3356 break;
3357
3358 default:
3359 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3360 "(debug info 0x%x)\n",
3361 fsf_req->qtcb->header.fsf_status);
1da177e4
LT		 3362 break;
3363 }
3364
3365 skip_fsfstatus:
3366 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3367 return retval;
3368}
3369
3370/**
3371 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3372 * @adapter: adapter where scsi command is issued
3373 * @unit: unit where command is sent to
3374 * @scsi_cmnd: scsi command to be sent
3375 * @timer: timer to be started when request is initiated
3376 * @req_flags: flags for fsf_request
3377 */
3378int
3379zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3380 struct zfcp_unit *unit,
3381 struct scsi_cmnd * scsi_cmnd,
2abbe866 3382 int use_timer, int req_flags)
1da177e4
LT		 3383{
3384 struct zfcp_fsf_req *fsf_req = NULL;
3385 struct fcp_cmnd_iu *fcp_cmnd_iu;
3386 unsigned int sbtype;
3387 unsigned long lock_flags;
3388 int real_bytes = 0;
3389 int retval = 0;
3390 int mask;
3391
3392 /* setup new FSF request */
3393 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3394 adapter->pool.fsf_req_scsi,
3395 &lock_flags, &fsf_req);
3396 if (unlikely(retval < 0)) {
3397 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3398 "for unit 0x%016Lx on port 0x%016Lx on "
3399 "adapter %s\n",
3400 unit->fcp_lun,
3401 unit->port->wwpn,
3402 zfcp_get_busid_by_adapter(adapter));
3403 goto failed_req_create;
3404 }
3405
ba172420
CS		 3406 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
3407 &unit->status))) {
3408 retval = -EBUSY;
3409 goto unit_blocked;
3410 }
3411
059c97d0
AH		 3412 zfcp_unit_get(unit);
3413 fsf_req->unit = unit;
1da177e4 3414
059c97d0 3415 /* associate FSF request with SCSI request (for look up on abort) */
4eff4a36 3416 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
059c97d0
AH		 3417
3418 /* associate SCSI command with FSF request */
3419 fsf_req->data = (unsigned long) scsi_cmnd;
1da177e4
LT		 3420
3421 /* set handles of unit and its parent port in QTCB */
3422 fsf_req->qtcb->header.lun_handle = unit->handle;
3423 fsf_req->qtcb->header.port_handle = unit->port->handle;
3424
3425 /* FSF does not define the structure of the FCP_CMND IU */
3426 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3427 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3428
3429 /*
3430 * set depending on data direction:
3431 * data direction bits in SBALE (SB Type)
3432 * data direction bits in QTCB
3433 * data direction bits in FCP_CMND IU
3434 */
3435 switch (scsi_cmnd->sc_data_direction) {
3436 case DMA_NONE:
1da177e4
LT		 3437 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3438 /*
3439 * FIXME(qdio):
3440 * what is the correct type for commands
3441 * without 'real' data buffers?
3442 */
3443 sbtype = SBAL_FLAGS0_TYPE_READ;
3444 break;
3445 case DMA_FROM_DEVICE:
1da177e4
LT		 3446 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3447 sbtype = SBAL_FLAGS0_TYPE_READ;
3448 fcp_cmnd_iu->rddata = 1;
3449 break;
3450 case DMA_TO_DEVICE:
1da177e4
LT		 3451 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3452 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3453 fcp_cmnd_iu->wddata = 1;
3454 break;
3455 case DMA_BIDIRECTIONAL:
1da177e4
LT		 3456 default:
3457 /*
3458 * dummy, catch this condition earlier
3459 * in zfcp_scsi_queuecommand
3460 */
3461 goto failed_scsi_cmnd;
3462 }
3463
3464 /* set FC service class in QTCB (3 per default) */
06506d00 3465 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 3466
3467 /* set FCP_LUN in FCP_CMND IU in QTCB */
3468 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3469
3470 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3471
3472 /* set task attributes in FCP_CMND IU in QTCB */
3473 if (likely((scsi_cmnd->device->simple_tags) ||
3474 (atomic_test_mask(mask, &unit->status))))
3475 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3476 else
3477 fcp_cmnd_iu->task_attribute = UNTAGGED;
3478
3479 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3480 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3481 fcp_cmnd_iu->add_fcp_cdb_length
3482 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3483 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3484 "additional FCP_CDB length is 0x%x "
3485 "(shifted right 2 bits)\n",
3486 scsi_cmnd->cmd_len,
3487 fcp_cmnd_iu->add_fcp_cdb_length);
3488 }
3489 /*
3490 * copy SCSI CDB (including additional length, if any) to
3491 * FCP_CDB in FCP_CMND IU in QTCB
3492 */
3493 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3494
3495 /* FCP CMND IU length in QTCB */
3496 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3497 sizeof (struct fcp_cmnd_iu) +
3498 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3499
3500 /* generate SBALEs from data buffer */
3501 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3502 if (unlikely(real_bytes < 0)) {
3503 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3504 ZFCP_LOG_DEBUG(
3505 "Data did not fit into available buffer(s), "
3506 "waiting for more...\n");
2282f658
CS		 3507 retval = -EIO;
3508 } else {
3509 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3510 "required. Shutting down unit "
3511 "(adapter %s, port 0x%016Lx, "
3512 "unit 0x%016Lx)\n",
3513 zfcp_get_busid_by_unit(unit),
3514 unit->port->wwpn,
3515 unit->fcp_lun);
1f6f7129 3516 zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
2282f658 3517 retval = -EINVAL;
1da177e4
LT		 3518 }
3519 goto no_fit;
3520 }
3521
3522 /* set length of FCP data length in FCP_CMND IU in QTCB */
3523 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3524
3525 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3526 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3527 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3528
2abbe866
AH		 3529 if (use_timer)
3530 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3531
3532 retval = zfcp_fsf_req_send(fsf_req);
1da177e4
LT		 3533 if (unlikely(retval < 0)) {
3534 ZFCP_LOG_INFO("error: Could not send FCP command request "
3535 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3536 zfcp_get_busid_by_adapter(adapter),
3537 unit->port->wwpn,
3538 unit->fcp_lun);
3539 goto send_failed;
3540 }
3541
3542 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3543 "port 0x%016Lx, unit 0x%016Lx)\n",
3544 zfcp_get_busid_by_adapter(adapter),
3545 unit->port->wwpn,
3546 unit->fcp_lun);
3547 goto success;
3548
3549 send_failed:
3550 no_fit:
3551 failed_scsi_cmnd:
059c97d0 3552 zfcp_unit_put(unit);
57b7658a 3553 unit_blocked:
1da177e4
LT		 3554 zfcp_fsf_req_free(fsf_req);
3555 fsf_req = NULL;
3556 scsi_cmnd->host_scribble = NULL;
3557 success:
3558 failed_req_create:
3559 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3560 return retval;
3561}
3562
1da177e4
LT		 3563struct zfcp_fsf_req *
3564zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3565 struct zfcp_unit *unit,
3566 u8 tm_flags, int req_flags)
3567{
3568 struct zfcp_fsf_req *fsf_req = NULL;
3569 int retval = 0;
3570 struct fcp_cmnd_iu *fcp_cmnd_iu;
3571 unsigned long lock_flags;
3572 volatile struct qdio_buffer_element *sbale;
3573
3574 /* setup new FSF request */
3575 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3576 adapter->pool.fsf_req_scsi,
3577 &lock_flags, &fsf_req);
3578 if (retval < 0) {
3579 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3580 "management) request for adapter %s, port "
3581 " 0x%016Lx, unit 0x%016Lx.\n",
3582 zfcp_get_busid_by_adapter(adapter),
3583 unit->port->wwpn, unit->fcp_lun);
3584 goto out;
3585 }
3586
fdf23452
CS		 3587 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
3588 &unit->status)))
3589 goto unit_blocked;
3590
1da177e4
LT		 3591 /*
3592 * Used to decide on proper handler in the return path,
3593 * could be either zfcp_fsf_send_fcp_command_task_handler or
3594 * zfcp_fsf_send_fcp_command_task_management_handler */
3595
3596 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3597
3598 /*
3599 * hold a pointer to the unit being target of this
3600 * task management request
3601 */
059c97d0 3602 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 3603
3604 /* set FSF related fields in QTCB */
3605 fsf_req->qtcb->header.lun_handle = unit->handle;
3606 fsf_req->qtcb->header.port_handle = unit->port->handle;
3607 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
06506d00 3608 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 3609 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3610 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3611
e891bffe 3612 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 3613 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3614 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3615
3616 /* set FCP related fields in FCP_CMND IU in QTCB */
3617 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3618 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3619 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3620 fcp_cmnd_iu->task_management_flags = tm_flags;
3621
2abbe866
AH		 3622 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
3623 retval = zfcp_fsf_req_send(fsf_req);
fdf23452 3624 if (!retval)
1da177e4 3625 goto out;
1da177e4 3626
fdf23452
CS		 3627 unit_blocked:
3628 zfcp_fsf_req_free(fsf_req);
3629 fsf_req = NULL;
3630
1da177e4
LT		 3631 out:
3632 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3633 return fsf_req;
3634}
3635
c9615858
CS		 3636static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
3637{
3638 lat_rec->sum += lat;
3639 if (lat_rec->min > lat)
3640 lat_rec->min = lat;
3641 if (lat_rec->max < lat)
3642 lat_rec->max = lat;
3643}
3644
3645static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
3646{
3647 struct fsf_qual_latency_info *lat_inf;
3648 struct latency_cont *lat;
3649 struct zfcp_unit *unit;
3650 unsigned long flags;
3651
3652 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
3653 unit = fsf_req->unit;
3654
3655 switch (fsf_req->qtcb->bottom.io.data_direction) {
3656 case FSF_DATADIR_READ:
3657 lat = &unit->latencies.read;
3658 break;
3659 case FSF_DATADIR_WRITE:
3660 lat = &unit->latencies.write;
3661 break;
3662 case FSF_DATADIR_CMND:
3663 lat = &unit->latencies.cmd;
3664 break;
3665 default:
3666 return;
3667 }
3668
3669 spin_lock_irqsave(&unit->latencies.lock, flags);
3670 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
3671 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
3672 lat->counter++;
3673 spin_unlock_irqrestore(&unit->latencies.lock, flags);
3674}
3675
1da177e4
LT		 3676/*
3677 * function: zfcp_fsf_send_fcp_command_handler
3678 *
3679 * purpose: is called for finished Send FCP Command
3680 *
41fa2ada 3681 * returns:
1da177e4
LT		 3682 */
3683static int
3684zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3685{
3686 int retval = -EINVAL;
3687 struct zfcp_unit *unit;
3688 struct fsf_qtcb_header *header;
3689 u16 subtable, rule, counter;
3690
3691 header = &fsf_req->qtcb->header;
3692
3693 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
059c97d0 3694 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 3695 else
059c97d0 3696 unit = fsf_req->unit;
1da177e4
LT		 3697
3698 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3699 /* go directly to calls of special handlers */
3700 goto skip_fsfstatus;
3701 }
3702
3703 /* evaluate FSF status in QTCB */
3704 switch (header->fsf_status) {
3705
3706 case FSF_PORT_HANDLE_NOT_VALID:
1da177e4
LT		 3707 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3708 "0x%016Lx on adapter %s invalid\n",
3709 unit->port->handle,
3710 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3711 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3712 (char *) &header->fsf_status_qual,
3713 sizeof (union fsf_status_qual));
1f6f7129 3714 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
1da177e4
LT		 3715 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3716 break;
3717
3718 case FSF_LUN_HANDLE_NOT_VALID:
1da177e4
LT		 3719 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3720 "0x%016Lx on port 0x%016Lx on adapter %s is "
3721 "invalid. This may happen occasionally.\n",
3722 unit->handle,
3723 unit->fcp_lun,
3724 unit->port->wwpn,
3725 zfcp_get_busid_by_unit(unit));
3726 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3727 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3728 (char *) &header->fsf_status_qual,
3729 sizeof (union fsf_status_qual));
1f6f7129 3730 zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
1da177e4
LT		 3731 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3732 break;
3733
3734 case FSF_HANDLE_MISMATCH:
1da177e4
LT		 3735 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3736 "unexpectedly. (adapter %s, port 0x%016Lx, "
3737 "unit 0x%016Lx)\n",
3738 unit->port->handle,
3739 zfcp_get_busid_by_unit(unit),
3740 unit->port->wwpn,
3741 unit->fcp_lun);
3742 ZFCP_LOG_NORMAL("status qualifier:\n");
3743 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3744 (char *) &header->fsf_status_qual,
3745 sizeof (union fsf_status_qual));
1f6f7129 3746 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
1da177e4
LT		 3747 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3748 break;
3749
3750 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
06506d00
AH		 3751 ZFCP_LOG_INFO("error: adapter %s does not support fc "
3752 "class %d.\n",
3753 zfcp_get_busid_by_unit(unit),
3754 ZFCP_FC_SERVICE_CLASS_DEFAULT);
1da177e4 3755 /* stop operation for this adapter */
1f6f7129 3756 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 132, fsf_req);
1da177e4
LT		 3757 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3758 break;
3759
3760 case FSF_FCPLUN_NOT_VALID:
1da177e4
LT		 3761 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3762 "adapter %s does not have correct unit "
3763 "handle 0x%x\n",
3764 unit->fcp_lun,
3765 unit->port->wwpn,
3766 zfcp_get_busid_by_unit(unit),
3767 unit->handle);
3768 ZFCP_LOG_DEBUG("status qualifier:\n");
3769 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3770 (char *) &header->fsf_status_qual,
3771 sizeof (union fsf_status_qual));
1f6f7129 3772 zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
1da177e4
LT		 3773 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3774 break;
3775
3776 case FSF_ACCESS_DENIED:
1da177e4
LT		 3777 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3778 "unit 0x%016Lx on port 0x%016Lx on "
3779 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3780 zfcp_get_busid_by_unit(unit));
3781 for (counter = 0; counter < 2; counter++) {
3782 subtable = header->fsf_status_qual.halfword[counter * 2];
3783 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3784 switch (subtable) {
3785 case FSF_SQ_CFDC_SUBTABLE_OS:
3786 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3787 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3788 case FSF_SQ_CFDC_SUBTABLE_LUN:
3789 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3790 zfcp_act_subtable_type[subtable], rule);
3791 break;
3792 }
3793 }
1f6f7129 3794 zfcp_erp_unit_access_denied(unit, 61, fsf_req);
1da177e4
LT		 3795 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3796 break;
3797
3798 case FSF_DIRECTION_INDICATOR_NOT_VALID:
1da177e4
LT		 3799 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3800 "0x%016Lx on port 0x%016Lx on adapter %s "
3801 "(debug info %d)\n",
3802 unit->fcp_lun,
3803 unit->port->wwpn,
3804 zfcp_get_busid_by_unit(unit),
3805 fsf_req->qtcb->bottom.io.data_direction);
3806 /* stop operation for this adapter */
1f6f7129 3807 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
1da177e4
LT		 3808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3809 break;
3810
3811 case FSF_CMND_LENGTH_NOT_VALID:
1da177e4
LT		 3812 ZFCP_LOG_NORMAL
3813 ("bug: An invalid control-data-block length field "
3814 "was found in a command for unit 0x%016Lx on port "
3815 "0x%016Lx on adapter %s " "(debug info %d)\n",
3816 unit->fcp_lun, unit->port->wwpn,
3817 zfcp_get_busid_by_unit(unit),
3818 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
3819 /* stop operation for this adapter */
1f6f7129 3820 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
1da177e4
LT		 3821 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3822 break;
3823
3824 case FSF_PORT_BOXED:
1da177e4
LT		 3825 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3826 "needs to be reopened\n",
3827 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
1f6f7129 3828 zfcp_erp_port_boxed(unit->port, 53, fsf_req);
1da177e4
LT		 3829 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3830 ZFCP_STATUS_FSFREQ_RETRY;
3831 break;
3832
3833 case FSF_LUN_BOXED:
1da177e4
LT		 3834 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
3835 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
3836 zfcp_get_busid_by_unit(unit),
3837 unit->port->wwpn, unit->fcp_lun);
1f6f7129 3838 zfcp_erp_unit_boxed(unit, 54, fsf_req);
1da177e4
LT		 3839 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
3840 | ZFCP_STATUS_FSFREQ_RETRY;
3841 break;
3842
3843 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 3844 switch (header->fsf_status_qual.word[0]) {
3845 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 3846 /* re-establish link to port */
65a8d4e1 3847 zfcp_test_link(unit->port);
1da177e4
LT		 3848 break;
3849 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 3850 /* FIXME(hw) need proper specs for proper action */
3851 /* let scsi stack deal with retries and escalation */
1da177e4
LT		 3852 break;
3853 default:
1da177e4 3854 ZFCP_LOG_NORMAL
516a4201 3855 ("Unknown status qualifier 0x%x arrived.\n",
1da177e4 3856 header->fsf_status_qual.word[0]);
1da177e4
LT		 3857 break;
3858 }
516a4201 3859 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 3860 break;
3861
3862 case FSF_GOOD:
1da177e4
LT		 3863 break;
3864
3865 case FSF_FCP_RSP_AVAILABLE:
1da177e4 3866 break;
1da177e4
LT		 3867 }
3868
3869 skip_fsfstatus:
3870 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3871 retval =
3872 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3873 } else {
3874 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
059c97d0
AH		 3875 fsf_req->unit = NULL;
3876 zfcp_unit_put(unit);
1da177e4
LT		 3877 }
3878 return retval;
3879}
3880
3881/*
3882 * function: zfcp_fsf_send_fcp_command_task_handler
3883 *
3884 * purpose: evaluates FCP_RSP IU
3885 *
41fa2ada 3886 * returns:
1da177e4
LT		 3887 */
3888static int
3889zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3890{
3891 int retval = 0;
3892 struct scsi_cmnd *scpnt;
3893 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3894 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3895 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3896 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3897 u32 sns_len;
3898 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
3899 unsigned long flags;
059c97d0 3900 struct zfcp_unit *unit = fsf_req->unit;
1da177e4
LT		 3901
3902 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
059c97d0 3903 scpnt = (struct scsi_cmnd *) fsf_req->data;
1da177e4
LT		 3904 if (unlikely(!scpnt)) {
3905 ZFCP_LOG_DEBUG
3906 ("Command with fsf_req %p is not associated to "
3907 "a scsi command anymore. Aborted?\n", fsf_req);
3908 goto out;
3909 }
3910 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3911 /* FIXME: (design) mid-layer should handle DID_ABORT like
3912 * DID_SOFT_ERROR by retrying the request for devices
3913 * that allow retries.
3914 */
3915 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
3916 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
3917 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
3918 goto skip_fsfstatus;
3919 }
3920
3921 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3922 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
3923 set_host_byte(&scpnt->result, DID_ERROR);
3924 goto skip_fsfstatus;
3925 }
3926
3927 /* set message byte of result in SCSI command */
3928 scpnt->result |= COMMAND_COMPLETE << 8;
3929
3930 /*
3931 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
3932 * of result in SCSI command
3933 */
3934 scpnt->result |= fcp_rsp_iu->scsi_status;
3935 if (unlikely(fcp_rsp_iu->scsi_status)) {
3936 /* DEBUG */
3937 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
3938 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3939 scpnt->cmnd, scpnt->cmd_len);
3940 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
3941 fcp_rsp_iu->scsi_status);
3942 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3943 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
3944 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3945 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
3946 fcp_rsp_iu->fcp_sns_len);
3947 }
3948
c9615858
CS		 3949 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
3950 zfcp_fsf_req_latency(fsf_req);
3951
1da177e4
LT		 3952 /* check FCP_RSP_INFO */
3953 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
3954 ZFCP_LOG_DEBUG("rsp_len is valid\n");
3955 switch (fcp_rsp_info[3]) {
3956 case RSP_CODE_GOOD:
1da177e4
LT		 3957 /* ok, continue */
3958 ZFCP_LOG_TRACE("no failure or Task Management "
3959 "Function complete\n");
3960 set_host_byte(&scpnt->result, DID_OK);
3961 break;
3962 case RSP_CODE_LENGTH_MISMATCH:
1da177e4
LT		 3963 /* hardware bug */
3964 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
3965 "that the fibrechannel protocol data "
3966 "length differs from the burst length. "
3967 "The problem occured on unit 0x%016Lx "
3968 "on port 0x%016Lx on adapter %s",
3969 unit->fcp_lun,
3970 unit->port->wwpn,
3971 zfcp_get_busid_by_unit(unit));
3972 /* dump SCSI CDB as prepared by zfcp */
3973 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3974 (char *) &fsf_req->qtcb->
3975 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 3976 set_host_byte(&scpnt->result, DID_ERROR);
3977 goto skip_fsfstatus;
3978 case RSP_CODE_FIELD_INVALID:
1da177e4
LT		 3979 /* driver or hardware bug */
3980 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
3981 "that the fibrechannel protocol data "
3982 "fields were incorrectly set up. "
3983 "The problem occured on the unit "
3984 "0x%016Lx on port 0x%016Lx on "
3985 "adapter %s",
3986 unit->fcp_lun,
3987 unit->port->wwpn,
3988 zfcp_get_busid_by_unit(unit));
3989 /* dump SCSI CDB as prepared by zfcp */
3990 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3991 (char *) &fsf_req->qtcb->
3992 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
3993 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 3994 goto skip_fsfstatus;
3995 case RSP_CODE_RO_MISMATCH:
1da177e4
LT		 3996 /* hardware bug */
3997 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
3998 "that conflicting values for the "
3999 "fibrechannel payload offset from the "
4000 "header were found. "
4001 "The problem occured on unit 0x%016Lx "
4002 "on port 0x%016Lx on adapter %s.\n",
4003 unit->fcp_lun,
4004 unit->port->wwpn,
4005 zfcp_get_busid_by_unit(unit));
4006 /* dump SCSI CDB as prepared by zfcp */
4007 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4008 (char *) &fsf_req->qtcb->
4009 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4
LT		 4010 set_host_byte(&scpnt->result, DID_ERROR);
4011 goto skip_fsfstatus;
4012 default:
4013 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4014 "code was detected for a command. "
4015 "The problem occured on the unit "
4016 "0x%016Lx on port 0x%016Lx on "
4017 "adapter %s (debug info 0x%x)\n",
4018 unit->fcp_lun,
4019 unit->port->wwpn,
4020 zfcp_get_busid_by_unit(unit),
4021 fcp_rsp_info[3]);
4022 /* dump SCSI CDB as prepared by zfcp */
4023 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4024 (char *) &fsf_req->qtcb->
4025 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
1da177e4 4026 set_host_byte(&scpnt->result, DID_ERROR);
6f71d9bc 4027 goto skip_fsfstatus;
1da177e4
LT		 4028 }
4029 }
4030
4031 /* check for sense data */
4032 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4033 sns_len = FSF_FCP_RSP_SIZE -
4034 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4035 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4036 sns_len);
4037 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4038 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4039 SCSI_SENSE_BUFFERSIZE);
4040 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4041 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4042 scpnt->result);
4043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
64a87b24 4044 scpnt->cmnd, scpnt->cmd_len);
1da177e4
LT		 4045
4046 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4047 fcp_rsp_iu->fcp_sns_len);
9d058ecf 4048 memcpy(scpnt->sense_buffer,
1da177e4
LT		 4049 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4050 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
9d058ecf 4051 (void *)scpnt->sense_buffer, sns_len);
1da177e4
LT		 4052 }
4053
4054 /* check for overrun */
4055 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4056 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4057 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4058 "The response data length is "
4059 "%d, the original length was %d.\n",
4060 unit->fcp_lun,
4061 unit->port->wwpn,
4062 zfcp_get_busid_by_unit(unit),
4063 fcp_rsp_iu->fcp_resid,
4064 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4065 }
4066
4067 /* check for underrun */
4068 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4069 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4070 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4071 "The response data length is "
4072 "%d, the original length was %d.\n",
4073 unit->fcp_lun,
4074 unit->port->wwpn,
4075 zfcp_get_busid_by_unit(unit),
4076 fcp_rsp_iu->fcp_resid,
4077 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4078
7936a892
FT		 4079 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
4080 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
4081 scpnt->underflow)
6f71d9bc 4082 set_host_byte(&scpnt->result, DID_ERROR);
1da177e4
LT		 4083 }
4084
4085 skip_fsfstatus:
4086 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4087
8a36e453 4088 if (scpnt->result != 0)
ed829ad6 4089 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
8a36e453 4090 else if (scpnt->retries > 0)
ed829ad6 4091 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
8a36e453 4092 else
ed829ad6 4093 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
1da177e4
LT		 4094
4095 /* cleanup pointer (need this especially for abort) */
4096 scpnt->host_scribble = NULL;
4097
1da177e4 4098 /* always call back */
1da177e4
LT		 4099 (scpnt->scsi_done) (scpnt);
4100
4101 /*
4102 * We must hold this lock until scsi_done has been called.
4103 * Otherwise we may call scsi_done after abort regarding this
4104 * command has completed.
4105 * Note: scsi_done must not block!
4106 */
4107 out:
4108 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4109 return retval;
4110}
4111
4112/*
4113 * function: zfcp_fsf_send_fcp_command_task_management_handler
4114 *
4115 * purpose: evaluates FCP_RSP IU
4116 *
41fa2ada 4117 * returns:
1da177e4
LT		 4118 */
4119static int
4120zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4121{
4122 int retval = 0;
4123 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4124 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4125 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
059c97d0 4126 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 4127
1da177e4
LT		 4128 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4129 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4130 goto skip_fsfstatus;
4131 }
4132
4133 /* check FCP_RSP_INFO */
4134 switch (fcp_rsp_info[3]) {
4135 case RSP_CODE_GOOD:
1da177e4
LT		 4136 /* ok, continue */
4137 ZFCP_LOG_DEBUG("no failure or Task Management "
4138 "Function complete\n");
4139 break;
4140 case RSP_CODE_TASKMAN_UNSUPP:
1da177e4
LT		 4141 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4142 "is not supported on the target device "
4143 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4144 unit->fcp_lun,
4145 unit->port->wwpn,
4146 zfcp_get_busid_by_unit(unit));
4147 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4148 break;
4149 case RSP_CODE_TASKMAN_FAILED:
1da177e4
LT		 4150 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4151 "failed to complete successfully. "
4152 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4153 unit->fcp_lun,
4154 unit->port->wwpn,
4155 zfcp_get_busid_by_unit(unit));
4156 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4157 break;
4158 default:
4159 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4160 "code was detected for a command. "
4161 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4162 "(debug info 0x%x)\n",
4163 unit->fcp_lun,
4164 unit->port->wwpn,
4165 zfcp_get_busid_by_unit(unit),
4166 fcp_rsp_info[3]);
4167 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4168 }
4169
4170 skip_fsfstatus:
4171 return retval;
4172}
4173
4174
4175/*
4176 * function: zfcp_fsf_control_file
4177 *
4178 * purpose: Initiator of the control file upload/download FSF requests
4179 *
4180 * returns: 0 - FSF request is successfuly created and queued
4181 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4182 * -EINVAL - Invalid direction specified
4183 * -ENOMEM - Insufficient memory
4184 * -EPERM - Cannot create FSF request or place it in QDIO queue
4185 */
45633fdc
CS		 4186struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4187 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4
LT		 4188{
4189 struct zfcp_fsf_req *fsf_req;
4190 struct fsf_qtcb_bottom_support *bottom;
4191 volatile struct qdio_buffer_element *sbale;
1da177e4 4192 unsigned long lock_flags;
1da177e4 4193 int direction;
45633fdc
CS		 4194 int retval;
4195 int bytes;
1da177e4 4196
45633fdc
CS		 4197 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
4198 return ERR_PTR(-EOPNOTSUPP);
1da177e4 4199
45633fdc 4200 switch (fsf_cfdc->command) {
1da177e4
LT		 4201 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4202 direction = SBAL_FLAGS0_TYPE_WRITE;
1da177e4 4203 break;
1da177e4
LT		 4204 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4205 direction = SBAL_FLAGS0_TYPE_READ;
4206 break;
1da177e4 4207 default:
45633fdc 4208 return ERR_PTR(-EINVAL);
1da177e4
LT		 4209 }
4210
45633fdc
CS		 4211 retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
4212 ZFCP_WAIT_FOR_SBAL,
1da177e4
LT		 4213 NULL, &lock_flags, &fsf_req);
4214 if (retval < 0) {
1da177e4
LT		 4215 retval = -EPERM;
4216 goto unlock_queue_lock;
4217 }
4218
e891bffe 4219 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 4220 sbale[0].flags |= direction;
4221
4222 bottom = &fsf_req->qtcb->bottom.support;
4223 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
45633fdc
CS		 4224 bottom->option = fsf_cfdc->option;
4225
4226 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4227 fsf_cfdc->sg, ZFCP_CFDC_PAGES,
4228 ZFCP_MAX_SBALS_PER_REQ);
4229 if (bytes != ZFCP_CFDC_MAX_SIZE) {
4230 retval = -ENOMEM;
4231 goto free_fsf_req;
4232 }
1da177e4 4233
2abbe866
AH		 4234 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
4235 retval = zfcp_fsf_req_send(fsf_req);
1da177e4 4236 if (retval < 0) {
1da177e4
LT		 4237 retval = -EPERM;
4238 goto free_fsf_req;
4239 }
4240 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4241
1da177e4
LT		 4242 wait_event(fsf_req->completion_wq,
4243 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4244
45633fdc 4245 return fsf_req;
1da177e4
LT		 4246
4247 free_fsf_req:
4248 zfcp_fsf_req_free(fsf_req);
4249 unlock_queue_lock:
4250 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
45633fdc 4251 return ERR_PTR(retval);
1da177e4
LT		 4252}
4253
45633fdc 4254static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
1da177e4 4255{
45633fdc 4256 if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
1da177e4 4257 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 4258}
4259
1da177e4
LT		 4260static inline int
4261zfcp_fsf_req_sbal_check(unsigned long *flags,
4262 struct zfcp_qdio_queue *queue, int needed)
4263{
4264 write_lock_irqsave(&queue->queue_lock, *flags);
4265 if (likely(atomic_read(&queue->free_count) >= needed))
4266 return 1;
4267 write_unlock_irqrestore(&queue->queue_lock, *flags);
4268 return 0;
4269}
4270
4271/*
4272 * set qtcb pointer in fsf_req and initialize QTCB
4273 */
4d284cac 4274static void
8a36e453 4275zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 4276{
4277 if (likely(fsf_req->qtcb != NULL)) {
fea9d6c7
VS		 4278 fsf_req->qtcb->prefix.req_seq_no =
4279 fsf_req->adapter->fsf_req_seq_no;
4280 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
1da177e4 4281 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
fea9d6c7
VS		 4282 fsf_req->qtcb->prefix.qtcb_type =
4283 fsf_qtcb_type[fsf_req->fsf_command];
1da177e4 4284 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
fea9d6c7 4285 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
8a36e453 4286 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
1da177e4
LT		 4287 }
4288}
4289
4290/**
4291 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4292 * @adapter: adapter for which request queue is examined
4293 * @req_flags: flags indicating whether to wait for needed SBAL or not
4294 * @lock_flags: lock_flags if queue_lock is taken
4295 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4296 * Locks: lock adapter->request_queue->queue_lock on success
4297 */
4298static int
4299zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4300 unsigned long *lock_flags)
4301{
4302 long ret;
4303 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4304
4305 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4306 ret = wait_event_interruptible_timeout(adapter->request_wq,
4307 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4308 ZFCP_SBAL_TIMEOUT);
4309 if (ret < 0)
4310 return ret;
4311 if (!ret)
4312 return -EIO;
4313 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4314 return -EIO;
4315
4316 return 0;
4317}
4318
4319/*
4320 * function: zfcp_fsf_req_create
4321 *
4322 * purpose: create an FSF request at the specified adapter and
4323 * setup common fields
4324 *
4325 * returns: -ENOMEM if there was insufficient memory for a request
4326 * -EIO if no qdio buffers could be allocate to the request
4327 * -EINVAL/-EPERM on bug conditions in req_dequeue
4328 * 0 in success
4329 *
4330 * note: The created request is returned by reference.
4331 *
4332 * locks: lock of concerned request queue must not be held,
4333 * but is held on completion (write, irqsave)
4334 */
4335int
4336zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4337 mempool_t *pool, unsigned long *lock_flags,
4338 struct zfcp_fsf_req **fsf_req_p)
4339{
4340 volatile struct qdio_buffer_element *sbale;
4341 struct zfcp_fsf_req *fsf_req = NULL;
4342 int ret = 0;
4343 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4344
4345 /* allocate new FSF request */
4346 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4347 if (unlikely(NULL == fsf_req)) {
ceb3dfba 4348 ZFCP_LOG_DEBUG("error: Could not put an FSF request into "
1da177e4
LT		 4349 "the outbound (send) queue.\n");
4350 ret = -ENOMEM;
4351 goto failed_fsf_req;
4352 }
4353
8a36e453
MS		 4354 fsf_req->adapter = adapter;
4355 fsf_req->fsf_command = fsf_cmd;
fea9d6c7 4356 INIT_LIST_HEAD(&fsf_req->list);
2abbe866 4357 init_timer(&fsf_req->timer);
1da177e4 4358
41fa2ada 4359 /* initialize waitqueue which may be used to wait on
1da177e4
LT		 4360 this request completion */
4361 init_waitqueue_head(&fsf_req->completion_wq);
4362
4363 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
801e0ced 4364 if (ret < 0)
1da177e4 4365 goto failed_sbals;
801e0ced
CS		 4366
4367 /* this is serialized (we are holding req_queue-lock of adapter) */
4368 if (adapter->req_no == 0)
4369 adapter->req_no++;
4370 fsf_req->req_id = adapter->req_no++;
4371
4372 zfcp_fsf_req_qtcb_init(fsf_req);
1da177e4
LT		 4373
4374 /*
4375 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4376 * if it is not set (see also *_open_qdio and *_close_qdio).
4377 */
4378
4379 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4380 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4381 ret = -EIO;
4382 goto failed_sbals;
4383 }
4384
8a36e453
MS		 4385 if (fsf_req->qtcb) {
4386 fsf_req->seq_no = adapter->fsf_req_seq_no;
4387 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4388 }
1da177e4
LT		 4389 fsf_req->sbal_number = 1;
4390 fsf_req->sbal_first = req_queue->free_index;
e891bffe 4391 fsf_req->sbal_last = req_queue->free_index;
1da177e4
LT		 4392 fsf_req->sbale_curr = 1;
4393
4394 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4395 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4396 }
4397
e891bffe 4398 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
1da177e4
LT		 4399
4400 /* setup common SBALE fields */
fea9d6c7 4401 sbale[0].addr = (void *) fsf_req->req_id;
1da177e4
LT		 4402 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4403 if (likely(fsf_req->qtcb != NULL)) {
4404 sbale[1].addr = (void *) fsf_req->qtcb;
4405 sbale[1].length = sizeof(struct fsf_qtcb);
4406 }
4407
4408 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4409 fsf_req->sbal_number, fsf_req->sbal_first);
4410
4411 goto success;
4412
4413 failed_sbals:
4414/* dequeue new FSF request previously enqueued */
4415 zfcp_fsf_req_free(fsf_req);
4416 fsf_req = NULL;
4417
4418 failed_fsf_req:
4419 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4420 success:
4421 *fsf_req_p = fsf_req;
4422 return ret;
4423}
4424
4425/*
4426 * function: zfcp_fsf_req_send
4427 *
4428 * purpose: start transfer of FSF request via QDIO
4429 *
4430 * returns: 0 - request transfer succesfully started
4431 * !0 - start of request transfer failed
4432 */
2abbe866 4433static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 4434{
4435 struct zfcp_adapter *adapter;
4436 struct zfcp_qdio_queue *req_queue;
4437 volatile struct qdio_buffer_element *sbale;
8a36e453 4438 int inc_seq_no;
1da177e4 4439 int new_distance_from_int;
1da177e4
LT		 4440 int retval = 0;
4441
4442 adapter = fsf_req->adapter;
4443 req_queue = &adapter->request_queue,
4444
4445
4446 /* FIXME(debug): remove it later */
4447 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4448 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4449 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4450 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4451 sbale[1].length);
4452
fea9d6c7
VS		 4453 /* put allocated FSF request into hash table */
4454 spin_lock(&adapter->req_list_lock);
4455 zfcp_reqlist_add(adapter, fsf_req);
4456 spin_unlock(&adapter->req_list_lock);
1da177e4 4457
8a36e453
MS		 4458 inc_seq_no = (fsf_req->qtcb != NULL);
4459
1da177e4
LT		 4460 ZFCP_LOG_TRACE("request queue of adapter %s: "
4461 "next free SBAL is %i, %i free SBALs\n",
4462 zfcp_get_busid_by_adapter(adapter),
4463 req_queue->free_index,
4464 atomic_read(&req_queue->free_count));
4465
4466 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4467 "index_in_queue=%i, count=%i, buffers=%p\n",
4468 zfcp_get_busid_by_adapter(adapter),
4469 QDIO_FLAG_SYNC_OUTPUT,
4470 0, fsf_req->sbal_first, fsf_req->sbal_number,
4471 &req_queue->buffer[fsf_req->sbal_first]);
4472
4473 /*
4474 * adjust the number of free SBALs in request queue as well as
4475 * position of first one
4476 */
4477 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
4478 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
4479 req_queue->free_index += fsf_req->sbal_number; /* increase */
4480 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
4481 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
4482
8a36e453
MS		 4483 fsf_req->issued = get_clock();
4484
1da177e4
LT		 4485 retval = do_QDIO(adapter->ccw_device,
4486 QDIO_FLAG_SYNC_OUTPUT,
4487 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
4488
4489 if (unlikely(retval)) {
4490 /* Queues are down..... */
4491 retval = -EIO;
2abbe866 4492 del_timer(&fsf_req->timer);
fea9d6c7 4493 spin_lock(&adapter->req_list_lock);
ca2d02c2 4494 zfcp_reqlist_remove(adapter, fsf_req);
fea9d6c7
VS		 4495 spin_unlock(&adapter->req_list_lock);
4496 /* undo changes in request queue made for this request */
1da177e4
LT		 4497 zfcp_qdio_zero_sbals(req_queue->buffer,
4498 fsf_req->sbal_first, fsf_req->sbal_number);
4499 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
fea9d6c7 4500 req_queue->free_index -= fsf_req->sbal_number;
1da177e4
LT		 4501 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
4502 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
1f6f7129 4503 zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
1da177e4
LT		 4504 } else {
4505 req_queue->distance_from_int = new_distance_from_int;
4506 /*
4507 * increase FSF sequence counter -
4508 * this must only be done for request successfully enqueued to
4509 * QDIO this rejected requests may be cleaned up by calling
4510 * routines resulting in missing sequence counter values
4511 * otherwise,
4512 */
8a36e453 4513
1da177e4 4514 /* Don't increase for unsolicited status */
8a36e453 4515 if (inc_seq_no)
1da177e4 4516 adapter->fsf_req_seq_no++;
8a36e453 4517
1da177e4 4518 /* count FSF requests pending */
fea9d6c7 4519 atomic_inc(&adapter->reqs_active);
1da177e4
LT		 4520 }
4521 return retval;
4522}
4523
1da177e4 4524#undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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