aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/s390/scsi/zfcp_fsf.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c5087
1 files changed, 5087 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
new file mode 100644
index 000000000000..578b9fbe5206
--- /dev/null
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -0,0 +1,5087 @@
1/*
2 *
3 * linux/drivers/s390/scsi/zfcp_fsf.c
4 *
5 * FCP adapter driver for IBM eServer zSeries
6 *
7 * (C) Copyright IBM Corp. 2002, 2004
8 *
9 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
10 * Raimund Schroeder <raimund.schroeder@de.ibm.com>
11 * Aron Zeh
12 * Wolfgang Taphorn
13 * Stefan Bader <stefan.bader@de.ibm.com>
14 * Heiko Carstens <heiko.carstens@de.ibm.com>
15 * Andreas Herrmann <aherrman@de.ibm.com>
16 * Volker Sameske <sameske@de.ibm.com>
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2, or (at your option)
21 * any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33#define ZFCP_FSF_C_REVISION "$Revision: 1.92 $"
34
35#include "zfcp_ext.h"
36
37static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
38static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
39static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
40static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
41static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
42static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
43static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
44static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
45static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
46static int zfcp_fsf_send_fcp_command_task_management_handler(
47 struct zfcp_fsf_req *);
48static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
49static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
50static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
51static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
52static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
53static inline int zfcp_fsf_req_sbal_check(
54 unsigned long *, struct zfcp_qdio_queue *, int);
55static inline int zfcp_use_one_sbal(
56 struct scatterlist *, int, struct scatterlist *, int);
57static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
58static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *);
59static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
60static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
61static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
62static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
63static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
64static void zfcp_fsf_req_free(struct zfcp_fsf_req *);
65
66/* association between FSF command and FSF QTCB type */
67static u32 fsf_qtcb_type[] = {
68 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
69 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
70 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
75 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
76 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
77 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
78 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
79 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
80 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
81};
82
83static const char zfcp_act_subtable_type[5][8] = {
84 "unknown", "OS", "WWPN", "DID", "LUN"
85};
86
87/****************************************************************/
88/*************** FSF related Functions *************************/
89/****************************************************************/
90
91#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
92
93/*
94 * function: zfcp_fsf_req_alloc
95 *
96 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
97 * unsolicited requests) via helper functions
98 * Does some initial fsf request set-up.
99 *
100 * returns: pointer to allocated fsf_req if successfull
101 * NULL otherwise
102 *
103 * locks: none
104 *
105 */
106static struct zfcp_fsf_req *
107zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
108{
109 size_t size;
110 void *ptr;
111 struct zfcp_fsf_req *fsf_req = NULL;
112
113 if (req_flags & ZFCP_REQ_NO_QTCB)
114 size = sizeof(struct zfcp_fsf_req);
115 else
116 size = sizeof(struct zfcp_fsf_req_pool_element);
117
118 if (likely(pool != NULL))
119 ptr = mempool_alloc(pool, GFP_ATOMIC);
120 else
121 ptr = kmalloc(size, GFP_ATOMIC);
122
123 if (unlikely(NULL == ptr))
124 goto out;
125
126 memset(ptr, 0, size);
127
128 if (req_flags & ZFCP_REQ_NO_QTCB) {
129 fsf_req = (struct zfcp_fsf_req *) ptr;
130 } else {
131 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
132 fsf_req->qtcb =
133 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
134 }
135
136 fsf_req->pool = pool;
137
138 out:
139 return fsf_req;
140}
141
142/*
143 * function: zfcp_fsf_req_free
144 *
145 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
146 * returns it into the pool via helper functions.
147 *
148 * returns: sod all
149 *
150 * locks: none
151 */
152static void
153zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
154{
155 if (likely(fsf_req->pool != NULL))
156 mempool_free(fsf_req, fsf_req->pool);
157 else
158 kfree(fsf_req);
159}
160
161/*
162 * function:
163 *
164 * purpose:
165 *
166 * returns:
167 *
168 * note: qdio queues shall be down (no ongoing inbound processing)
169 */
170int
171zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
172{
173 int retval = 0;
174 struct zfcp_fsf_req *fsf_req, *tmp;
175
176 list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head,
177 list)
178 zfcp_fsf_req_dismiss(fsf_req);
179 /* wait_event_timeout? */
180 while (!list_empty(&adapter->fsf_req_list_head)) {
181 ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n",
182 zfcp_get_busid_by_adapter(adapter));
183 /* wait for woken intiators to clean up their requests */
184 msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT));
185 }
186
187 /* consistency check */
188 if (atomic_read(&adapter->fsf_reqs_active)) {
189 ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending "
190 "on adapter %s after cleanup.\n",
191 atomic_read(&adapter->fsf_reqs_active),
192 zfcp_get_busid_by_adapter(adapter));
193 atomic_set(&adapter->fsf_reqs_active, 0);
194 }
195
196 return retval;
197}
198
199/*
200 * function:
201 *
202 * purpose:
203 *
204 * returns:
205 */
206static void
207zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
208{
209 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
210 zfcp_fsf_req_complete(fsf_req);
211}
212
213/*
214 * function: zfcp_fsf_req_complete
215 *
216 * purpose: Updates active counts and timers for openfcp-reqs
217 * May cleanup request after req_eval returns
218 *
219 * returns: 0 - success
220 * !0 - failure
221 *
222 * context:
223 */
224int
225zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
226{
227 int retval = 0;
228 int cleanup;
229 struct zfcp_adapter *adapter = fsf_req->adapter;
230
231 /* do some statistics */
232 atomic_dec(&adapter->fsf_reqs_active);
233
234 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
235 ZFCP_LOG_DEBUG("Status read response received\n");
236 /*
237 * Note: all cleanup handling is done in the callchain of
238 * the function call-chain below.
239 */
240 zfcp_fsf_status_read_handler(fsf_req);
241 goto out;
242 } else
243 zfcp_fsf_protstatus_eval(fsf_req);
244
245 /*
246 * fsf_req may be deleted due to waking up functions, so
247 * cleanup is saved here and used later
248 */
249 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
250 cleanup = 1;
251 else
252 cleanup = 0;
253
254 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
255
256 /* cleanup request if requested by initiator */
257 if (likely(cleanup)) {
258 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
259 /*
260 * lock must not be held here since it will be
261 * grabed by the called routine, too
262 */
263 zfcp_fsf_req_cleanup(fsf_req);
264 } else {
265 /* notify initiator waiting for the requests completion */
266 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
267 /*
268 * FIXME: Race! We must not access fsf_req here as it might have been
269 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
270 * flag. It's an improbable case. But, we have the same paranoia for
271 * the cleanup flag already.
272 * Might better be handled using complete()?
273 * (setting the flag and doing wakeup ought to be atomic
274 * with regard to checking the flag as long as waitqueue is
275 * part of the to be released structure)
276 */
277 wake_up(&fsf_req->completion_wq);
278 }
279
280 out:
281 return retval;
282}
283
284/*
285 * function: zfcp_fsf_protstatus_eval
286 *
287 * purpose: evaluates the QTCB of the finished FSF request
288 * and initiates appropriate actions
289 * (usually calling FSF command specific handlers)
290 *
291 * returns:
292 *
293 * context:
294 *
295 * locks:
296 */
297static int
298zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
299{
300 int retval = 0;
301 struct zfcp_adapter *adapter = fsf_req->adapter;
302
303 ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
304
305 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
306 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
307 (unsigned long) fsf_req);
308 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
309 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
310 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
311 goto skip_protstatus;
312 }
313
314 /* log additional information provided by FSF (if any) */
315 if (unlikely(fsf_req->qtcb->header.log_length)) {
316 /* do not trust them ;-) */
317 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
318 ZFCP_LOG_NORMAL
319 ("bug: ULP (FSF logging) log data starts "
320 "beyond end of packet header. Ignored. "
321 "(start=%i, size=%li)\n",
322 fsf_req->qtcb->header.log_start,
323 sizeof(struct fsf_qtcb));
324 goto forget_log;
325 }
326 if ((size_t) (fsf_req->qtcb->header.log_start +
327 fsf_req->qtcb->header.log_length)
328 > sizeof(struct fsf_qtcb)) {
329 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
330 "beyond end of packet header. Ignored. "
331 "(start=%i, length=%i, size=%li)\n",
332 fsf_req->qtcb->header.log_start,
333 fsf_req->qtcb->header.log_length,
334 sizeof(struct fsf_qtcb));
335 goto forget_log;
336 }
337 ZFCP_LOG_TRACE("ULP log data: \n");
338 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
339 (char *) fsf_req->qtcb +
340 fsf_req->qtcb->header.log_start,
341 fsf_req->qtcb->header.log_length);
342 }
343 forget_log:
344
345 /* evaluate FSF Protocol Status */
346 switch (fsf_req->qtcb->prefix.prot_status) {
347
348 case FSF_PROT_GOOD:
349 ZFCP_LOG_TRACE("FSF_PROT_GOOD\n");
350 break;
351
352 case FSF_PROT_FSF_STATUS_PRESENTED:
353 ZFCP_LOG_TRACE("FSF_PROT_FSF_STATUS_PRESENTED\n");
354 break;
355
356 case FSF_PROT_QTCB_VERSION_ERROR:
357 ZFCP_LOG_FLAGS(0, "FSF_PROT_QTCB_VERSION_ERROR\n");
358 ZFCP_LOG_NORMAL("error: The adapter %s contains "
359 "microcode of version 0x%x, the device driver "
360 "only supports 0x%x. Aborting.\n",
361 zfcp_get_busid_by_adapter(adapter),
362 fsf_req->qtcb->prefix.prot_status_qual.
363 version_error.fsf_version, ZFCP_QTCB_VERSION);
364 /* stop operation for this adapter */
365 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
366 zfcp_erp_adapter_shutdown(adapter, 0);
367 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
368 &fsf_req->qtcb->prefix.prot_status_qual,
369 sizeof (union fsf_prot_status_qual));
370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372
373 case FSF_PROT_SEQ_NUMB_ERROR:
374 ZFCP_LOG_FLAGS(0, "FSF_PROT_SEQ_NUMB_ERROR\n");
375 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
376 "driver (0x%x) and adapter %s (0x%x). "
377 "Restarting all operations on this adapter.\n",
378 fsf_req->qtcb->prefix.req_seq_no,
379 zfcp_get_busid_by_adapter(adapter),
380 fsf_req->qtcb->prefix.prot_status_qual.
381 sequence_error.exp_req_seq_no);
382 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
383 /* restart operation on this adapter */
384 zfcp_erp_adapter_reopen(adapter, 0);
385 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
386 &fsf_req->qtcb->prefix.prot_status_qual,
387 sizeof (union fsf_prot_status_qual));
388 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
389 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
390 break;
391
392 case FSF_PROT_UNSUPP_QTCB_TYPE:
393 ZFCP_LOG_FLAGS(0, "FSF_PROT_UNSUP_QTCB_TYPE\n");
394 ZFCP_LOG_NORMAL("error: Packet header type used by the "
395 "device driver is incompatible with "
396 "that used on adapter %s. "
397 "Stopping all operations on this adapter.\n",
398 zfcp_get_busid_by_adapter(adapter));
399 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
400 zfcp_erp_adapter_shutdown(adapter, 0);
401 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
402 &fsf_req->qtcb->prefix.prot_status_qual,
403 sizeof (union fsf_prot_status_qual));
404 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
405 break;
406
407 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
408 ZFCP_LOG_FLAGS(1, "FSF_PROT_HOST_CONNECTION_INITIALIZING\n");
409 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
410 &fsf_req->qtcb->prefix.prot_status_qual,
411 sizeof (union fsf_prot_status_qual));
412 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
413 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
414 &(adapter->status));
415 debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
416 break;
417
418 case FSF_PROT_DUPLICATE_REQUEST_ID:
419 ZFCP_LOG_FLAGS(0, "FSF_PROT_DUPLICATE_REQUEST_IDS\n");
420 if (fsf_req->qtcb) {
421 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
422 "to the adapter %s is ambiguous. "
423 "Stopping all operations on this "
424 "adapter.\n",
425 *(unsigned long long *)
426 (&fsf_req->qtcb->bottom.support.
427 req_handle),
428 zfcp_get_busid_by_adapter(adapter));
429 } else {
430 ZFCP_LOG_NORMAL("bug: The request identifier %p "
431 "to the adapter %s is ambiguous. "
432 "Stopping all operations on this "
433 "adapter. "
434 "(bug: got this for an unsolicited "
435 "status read request)\n",
436 fsf_req,
437 zfcp_get_busid_by_adapter(adapter));
438 }
439 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
440 zfcp_erp_adapter_shutdown(adapter, 0);
441 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
442 &fsf_req->qtcb->prefix.prot_status_qual,
443 sizeof (union fsf_prot_status_qual));
444 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
445 break;
446
447 case FSF_PROT_LINK_DOWN:
448 ZFCP_LOG_FLAGS(1, "FSF_PROT_LINK_DOWN\n");
449 /*
450 * 'test and set' is not atomic here -
451 * it's ok as long as calls to our response queue handler
452 * (and thus execution of this code here) are serialized
453 * by the qdio module
454 */
455 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
456 &adapter->status)) {
457 switch (fsf_req->qtcb->prefix.prot_status_qual.
458 locallink_error.code) {
459 case FSF_PSQ_LINK_NOLIGHT:
460 ZFCP_LOG_INFO("The local link to adapter %s "
461 "is down (no light detected).\n",
462 zfcp_get_busid_by_adapter(
463 adapter));
464 break;
465 case FSF_PSQ_LINK_WRAPPLUG:
466 ZFCP_LOG_INFO("The local link to adapter %s "
467 "is down (wrap plug detected).\n",
468 zfcp_get_busid_by_adapter(
469 adapter));
470 break;
471 case FSF_PSQ_LINK_NOFCP:
472 ZFCP_LOG_INFO("The local link to adapter %s "
473 "is down (adjacent node on "
474 "link does not support FCP).\n",
475 zfcp_get_busid_by_adapter(
476 adapter));
477 break;
478 default:
479 ZFCP_LOG_INFO("The local link to adapter %s "
480 "is down "
481 "(warning: unknown reason "
482 "code).\n",
483 zfcp_get_busid_by_adapter(
484 adapter));
485 break;
486
487 }
488 /*
489 * Due to the 'erp failed' flag the adapter won't
490 * be recovered but will be just set to 'blocked'
491 * state. All subordinary devices will have state
492 * 'blocked' and 'erp failed', too.
493 * Thus the adapter is still able to provide
494 * 'link up' status without being flooded with
495 * requests.
496 * (note: even 'close port' is not permitted)
497 */
498 ZFCP_LOG_INFO("Stopping all operations for adapter "
499 "%s.\n",
500 zfcp_get_busid_by_adapter(adapter));
501 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
502 ZFCP_STATUS_COMMON_ERP_FAILED,
503 &adapter->status);
504 zfcp_erp_adapter_reopen(adapter, 0);
505 debug_text_event(adapter->erp_dbf, 1, "prot_link_down");
506 }
507 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
508 break;
509
510 case FSF_PROT_REEST_QUEUE:
511 ZFCP_LOG_FLAGS(1, "FSF_PROT_REEST_QUEUE\n");
512 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
513 ZFCP_LOG_INFO("The local link to adapter with "
514 "%s was re-plugged. "
515 "Re-starting operations on this adapter.\n",
516 zfcp_get_busid_by_adapter(adapter));
517 /* All ports should be marked as ready to run again */
518 zfcp_erp_modify_adapter_status(adapter,
519 ZFCP_STATUS_COMMON_RUNNING,
520 ZFCP_SET);
521 zfcp_erp_adapter_reopen(adapter,
522 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
523 | ZFCP_STATUS_COMMON_ERP_FAILED);
524 zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
525 &fsf_req->qtcb->prefix.prot_status_qual,
526 sizeof (union fsf_prot_status_qual));
527 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
528 break;
529
530 case FSF_PROT_ERROR_STATE:
531 ZFCP_LOG_FLAGS(0, "FSF_PROT_ERROR_STATE\n");
532 ZFCP_LOG_NORMAL("error: The adapter %s "
533 "has entered the error state. "
534 "Restarting all operations on this "
535 "adapter.\n",
536 zfcp_get_busid_by_adapter(adapter));
537 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
538 /* restart operation on this adapter */
539 zfcp_erp_adapter_reopen(adapter, 0);
540 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
541 &fsf_req->qtcb->prefix.prot_status_qual,
542 sizeof (union fsf_prot_status_qual));
543 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
544 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
545 break;
546
547 default:
548 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
549 "provided by the adapter %s "
550 "is not compatible with the device driver. "
551 "Stopping all operations on this adapter. "
552 "(debug info 0x%x).\n",
553 zfcp_get_busid_by_adapter(adapter),
554 fsf_req->qtcb->prefix.prot_status);
555 debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
556 debug_exception(adapter->erp_dbf, 0,
557 &fsf_req->qtcb->prefix.prot_status,
558 sizeof (u32));
559 zfcp_erp_adapter_shutdown(adapter, 0);
560 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
561 }
562
563 skip_protstatus:
564 /*
565 * always call specific handlers to give them a chance to do
566 * something meaningful even in error cases
567 */
568 zfcp_fsf_fsfstatus_eval(fsf_req);
569 return retval;
570}
571
572/*
573 * function: zfcp_fsf_fsfstatus_eval
574 *
575 * purpose: evaluates FSF status of completed FSF request
576 * and acts accordingly
577 *
578 * returns:
579 */
580static int
581zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
582{
583 int retval = 0;
584
585 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
586 goto skip_fsfstatus;
587 }
588
589 /* evaluate FSF Status */
590 switch (fsf_req->qtcb->header.fsf_status) {
591 case FSF_UNKNOWN_COMMAND:
592 ZFCP_LOG_FLAGS(0, "FSF_UNKNOWN_COMMAND\n");
593 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
594 "not known by the adapter %s "
595 "Stopping all operations on this adapter. "
596 "(debug info 0x%x).\n",
597 zfcp_get_busid_by_adapter(fsf_req->adapter),
598 fsf_req->qtcb->header.fsf_command);
599 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
600 "fsf_s_unknown");
601 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
602 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
603 &fsf_req->qtcb->header.fsf_status_qual,
604 sizeof (union fsf_status_qual));
605 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
606 break;
607
608 case FSF_FCP_RSP_AVAILABLE:
609 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
610 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
611 "SCSI stack.\n");
612 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
613 break;
614
615 case FSF_ADAPTER_STATUS_AVAILABLE:
616 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
617 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
618 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
619 break;
620
621 default:
622 break;
623 }
624
625 skip_fsfstatus:
626 /*
627 * always call specific handlers to give them a chance to do
628 * something meaningful even in error cases
629 */
630 zfcp_fsf_req_dispatch(fsf_req);
631
632 return retval;
633}
634
635/*
636 * function: zfcp_fsf_fsfstatus_qual_eval
637 *
638 * purpose: evaluates FSF status-qualifier of completed FSF request
639 * and acts accordingly
640 *
641 * returns:
642 */
643static int
644zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
645{
646 int retval = 0;
647
648 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
649 case FSF_SQ_FCP_RSP_AVAILABLE:
650 ZFCP_LOG_FLAGS(2, "FSF_SQ_FCP_RSP_AVAILABLE\n");
651 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
652 break;
653 case FSF_SQ_RETRY_IF_POSSIBLE:
654 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
655 /* The SCSI-stack may now issue retries or escalate */
656 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
657 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
658 &fsf_req->qtcb->header.fsf_status_qual,
659 sizeof (union fsf_status_qual));
660 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
661 break;
662 case FSF_SQ_COMMAND_ABORTED:
663 ZFCP_LOG_FLAGS(2, "FSF_SQ_COMMAND_ABORTED\n");
664 /* Carry the aborted state on to upper layer */
665 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
666 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
667 &fsf_req->qtcb->header.fsf_status_qual,
668 sizeof (union fsf_status_qual));
669 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
670 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
671 break;
672 case FSF_SQ_NO_RECOM:
673 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RECOM\n");
674 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
675 "fsf_sq_no_rec");
676 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
677 "problem on the adapter %s "
678 "Stopping all operations on this adapter. ",
679 zfcp_get_busid_by_adapter(fsf_req->adapter));
680 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
681 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
682 &fsf_req->qtcb->header.fsf_status_qual,
683 sizeof (union fsf_status_qual));
684 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
685 break;
686 case FSF_SQ_ULP_PROGRAMMING_ERROR:
687 ZFCP_LOG_FLAGS(0, "FSF_SQ_ULP_PROGRAMMING_ERROR\n");
688 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
689 "(adapter %s)\n",
690 zfcp_get_busid_by_adapter(fsf_req->adapter));
691 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
692 "fsf_sq_ulp_err");
693 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
694 break;
695 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
696 case FSF_SQ_NO_RETRY_POSSIBLE:
697 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
698 /* dealt with in the respective functions */
699 break;
700 default:
701 ZFCP_LOG_NORMAL("bug: Additional status info could "
702 "not be interpreted properly.\n");
703 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
704 (char *) &fsf_req->qtcb->header.fsf_status_qual,
705 sizeof (union fsf_status_qual));
706 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
707 debug_exception(fsf_req->adapter->erp_dbf, 0,
708 &fsf_req->qtcb->header.fsf_status_qual.word[0],
709 sizeof (u32));
710 zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
711 &fsf_req->qtcb->header.fsf_status_qual,
712 sizeof (union fsf_status_qual));
713 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
714 break;
715 }
716
717 return retval;
718}
719
720/*
721 * function: zfcp_fsf_req_dispatch
722 *
723 * purpose: calls the appropriate command specific handler
724 *
725 * returns:
726 */
727static int
728zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
729{
730 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
731 struct zfcp_adapter *adapter = fsf_req->adapter;
732 int retval = 0;
733
734 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
735 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
736 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
737 (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
738 }
739
740 switch (fsf_req->fsf_command) {
741
742 case FSF_QTCB_FCP_CMND:
743 ZFCP_LOG_FLAGS(3, "FSF_QTCB_FCP_CMND\n");
744 zfcp_fsf_send_fcp_command_handler(fsf_req);
745 break;
746
747 case FSF_QTCB_ABORT_FCP_CMND:
748 ZFCP_LOG_FLAGS(2, "FSF_QTCB_ABORT_FCP_CMND\n");
749 zfcp_fsf_abort_fcp_command_handler(fsf_req);
750 break;
751
752 case FSF_QTCB_SEND_GENERIC:
753 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_GENERIC\n");
754 zfcp_fsf_send_ct_handler(fsf_req);
755 break;
756
757 case FSF_QTCB_OPEN_PORT_WITH_DID:
758 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_PORT_WITH_DID\n");
759 zfcp_fsf_open_port_handler(fsf_req);
760 break;
761
762 case FSF_QTCB_OPEN_LUN:
763 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_LUN\n");
764 zfcp_fsf_open_unit_handler(fsf_req);
765 break;
766
767 case FSF_QTCB_CLOSE_LUN:
768 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_LUN\n");
769 zfcp_fsf_close_unit_handler(fsf_req);
770 break;
771
772 case FSF_QTCB_CLOSE_PORT:
773 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PORT\n");
774 zfcp_fsf_close_port_handler(fsf_req);
775 break;
776
777 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
778 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PHYSICAL_PORT\n");
779 zfcp_fsf_close_physical_port_handler(fsf_req);
780 break;
781
782 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
783 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_CONFIG_DATA\n");
784 zfcp_fsf_exchange_config_data_handler(fsf_req);
785 break;
786
787 case FSF_QTCB_EXCHANGE_PORT_DATA:
788 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_PORT_DATA\n");
789 zfcp_fsf_exchange_port_data_handler(fsf_req);
790 break;
791
792 case FSF_QTCB_SEND_ELS:
793 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_ELS\n");
794 zfcp_fsf_send_els_handler(fsf_req);
795 break;
796
797 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
798 ZFCP_LOG_FLAGS(2, "FSF_QTCB_DOWNLOAD_CONTROL_FILE\n");
799 zfcp_fsf_control_file_handler(fsf_req);
800 break;
801
802 case FSF_QTCB_UPLOAD_CONTROL_FILE:
803 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UPLOAD_CONTROL_FILE\n");
804 zfcp_fsf_control_file_handler(fsf_req);
805 break;
806
807 default:
808 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UNKNOWN\n");
809 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
810 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
811 "not supported by the adapter %s\n",
812 zfcp_get_busid_by_adapter(fsf_req->adapter));
813 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
814 ZFCP_LOG_NORMAL
815 ("bug: Command issued by the device driver differs "
816 "from the command returned by the adapter %s "
817 "(debug info 0x%x, 0x%x).\n",
818 zfcp_get_busid_by_adapter(fsf_req->adapter),
819 fsf_req->fsf_command,
820 fsf_req->qtcb->header.fsf_command);
821 }
822
823 if (!erp_action)
824 return retval;
825
826 debug_text_event(adapter->erp_dbf, 3, "a_frh");
827 debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
828 zfcp_erp_async_handler(erp_action, 0);
829
830 return retval;
831}
832
833/*
834 * function: zfcp_fsf_status_read
835 *
836 * purpose: initiates a Status Read command at the specified adapter
837 *
838 * returns:
839 */
840int
841zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
842{
843 struct zfcp_fsf_req *fsf_req;
844 struct fsf_status_read_buffer *status_buffer;
845 unsigned long lock_flags;
846 volatile struct qdio_buffer_element *sbale;
847 int retval = 0;
848
849 /* setup new FSF request */
850 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
851 req_flags | ZFCP_REQ_NO_QTCB,
852 adapter->pool.fsf_req_status_read,
853 &lock_flags, &fsf_req);
854 if (retval < 0) {
855 ZFCP_LOG_INFO("error: Could not create unsolicited status "
856 "buffer for adapter %s.\n",
857 zfcp_get_busid_by_adapter(adapter));
858 goto failed_req_create;
859 }
860
861 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
862 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
863 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
864 fsf_req->sbale_curr = 2;
865
866 status_buffer =
867 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
868 if (!status_buffer) {
869 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
870 goto failed_buf;
871 }
872 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
873 fsf_req->data.status_read.buffer = status_buffer;
874
875 /* insert pointer to respective buffer */
876 sbale = zfcp_qdio_sbale_curr(fsf_req);
877 sbale->addr = (void *) status_buffer;
878 sbale->length = sizeof(struct fsf_status_read_buffer);
879
880 /* start QDIO request for this FSF request */
881 retval = zfcp_fsf_req_send(fsf_req, NULL);
882 if (retval) {
883 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
884 "environment.\n");
885 goto failed_req_send;
886 }
887
888 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
889 zfcp_get_busid_by_adapter(adapter));
890 goto out;
891
892 failed_req_send:
893 mempool_free(status_buffer, adapter->pool.data_status_read);
894
895 failed_buf:
896 zfcp_fsf_req_free(fsf_req);
897 failed_req_create:
898 out:
899 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
900 return retval;
901}
902
903static int
904zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
905{
906 struct fsf_status_read_buffer *status_buffer;
907 struct zfcp_adapter *adapter;
908 struct zfcp_port *port;
909 unsigned long flags;
910
911 status_buffer = fsf_req->data.status_read.buffer;
912 adapter = fsf_req->adapter;
913
914 read_lock_irqsave(&zfcp_data.config_lock, flags);
915 list_for_each_entry(port, &adapter->port_list_head, list)
916 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
917 break;
918 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
919
920 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
921 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
922 "nonexisting port with d_id 0x%08x on "
923 "adapter %s. Ignored.\n",
924 status_buffer->d_id & ZFCP_DID_MASK,
925 zfcp_get_busid_by_adapter(adapter));
926 goto out;
927 }
928
929 switch (status_buffer->status_subtype) {
930
931 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
932 ZFCP_LOG_FLAGS(2, "FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT\n");
933 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
934 zfcp_erp_port_reopen(port, 0);
935 break;
936
937 case FSF_STATUS_READ_SUB_ERROR_PORT:
938 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SUB_ERROR_PORT\n");
939 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
940 zfcp_erp_port_shutdown(port, 0);
941 break;
942
943 default:
944 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
945 debug_exception(adapter->erp_dbf, 0,
946 &status_buffer->status_subtype, sizeof (u32));
947 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
948 "for a reopen indication on port with "
949 "d_id 0x%08x on the adapter %s. "
950 "Ignored. (debug info 0x%x)\n",
951 status_buffer->d_id,
952 zfcp_get_busid_by_adapter(adapter),
953 status_buffer->status_subtype);
954 }
955 out:
956 return 0;
957}
958
959/*
960 * function: zfcp_fsf_status_read_handler
961 *
962 * purpose: is called for finished Open Port command
963 *
964 * returns:
965 */
966static int
967zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
968{
969 int retval = 0;
970 struct zfcp_adapter *adapter = fsf_req->adapter;
971 struct fsf_status_read_buffer *status_buffer =
972 fsf_req->data.status_read.buffer;
973
974 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
975 mempool_free(status_buffer, adapter->pool.data_status_read);
976 zfcp_fsf_req_cleanup(fsf_req);
977 goto out;
978 }
979
980 switch (status_buffer->status_type) {
981
982 case FSF_STATUS_READ_PORT_CLOSED:
983 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_PORT_CLOSED\n");
984 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
985 debug_event(adapter->erp_dbf, 3,
986 &status_buffer->d_id, sizeof (u32));
987 zfcp_fsf_status_read_port_closed(fsf_req);
988 break;
989
990 case FSF_STATUS_READ_INCOMING_ELS:
991 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_INCOMING_ELS\n");
992 debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
993 zfcp_fsf_incoming_els(fsf_req);
994 break;
995
996 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
997 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SENSE_DATA_AVAIL\n");
998 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
999 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
1000 zfcp_get_busid_by_adapter(adapter));
1001 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
1002 sizeof(struct fsf_status_read_buffer));
1003 break;
1004
1005 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
1006 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_BIT_ERROR_THRESHOLD\n");
1007 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
1008 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
1009 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
1010 (char *) status_buffer,
1011 sizeof (struct fsf_status_read_buffer));
1012 break;
1013
1014 case FSF_STATUS_READ_LINK_DOWN:
1015 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_DOWN\n");
1016 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
1017 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
1018 zfcp_get_busid_by_adapter(adapter));
1019 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
1020 &adapter->status);
1021 zfcp_erp_adapter_failed(adapter);
1022 break;
1023
1024 case FSF_STATUS_READ_LINK_UP:
1025 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_UP\n");
1026 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
1027 ZFCP_LOG_INFO("Local link to adapter %s was replugged. "
1028 "Restarting operations on this adapter\n",
1029 zfcp_get_busid_by_adapter(adapter));
1030 /* All ports should be marked as ready to run again */
1031 zfcp_erp_modify_adapter_status(adapter,
1032 ZFCP_STATUS_COMMON_RUNNING,
1033 ZFCP_SET);
1034 zfcp_erp_adapter_reopen(adapter,
1035 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
1036 | ZFCP_STATUS_COMMON_ERP_FAILED);
1037 break;
1038
1039 case FSF_STATUS_READ_CFDC_UPDATED:
1040 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_UPDATED\n");
1041 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
1042 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
1043 zfcp_get_busid_by_adapter(adapter));
1044 zfcp_erp_adapter_access_changed(adapter);
1045 break;
1046
1047 case FSF_STATUS_READ_CFDC_HARDENED:
1048 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_HARDENED\n");
1049 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
1050 switch (status_buffer->status_subtype) {
1051 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
1052 ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n",
1053 zfcp_get_busid_by_adapter(adapter));
1054 break;
1055 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
1056 ZFCP_LOG_INFO("CFDC of adapter %s has been copied "
1057 "to the secondary SE\n",
1058 zfcp_get_busid_by_adapter(adapter));
1059 break;
1060 default:
1061 ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
1062 zfcp_get_busid_by_adapter(adapter));
1063 }
1064 break;
1065
1066 default:
1067 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
1068 debug_exception(adapter->erp_dbf, 0,
1069 &status_buffer->status_type, sizeof (u32));
1070 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown "
1071 "type was received (debug info 0x%x)\n",
1072 status_buffer->status_type);
1073 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1074 status_buffer);
1075 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1076 (char *) status_buffer,
1077 sizeof (struct fsf_status_read_buffer));
1078 break;
1079 }
1080 mempool_free(status_buffer, adapter->pool.data_status_read);
1081 zfcp_fsf_req_cleanup(fsf_req);
1082 /*
1083 * recycle buffer and start new request repeat until outbound
1084 * queue is empty or adapter shutdown is requested
1085 */
1086 /*
1087 * FIXME(qdio):
1088 * we may wait in the req_create for 5s during shutdown, so
1089 * qdio_cleanup will have to wait at least that long before returning
1090 * with failure to allow us a proper cleanup under all circumstances
1091 */
1092 /*
1093 * FIXME:
1094 * allocation failure possible? (Is this code needed?)
1095 */
1096 retval = zfcp_fsf_status_read(adapter, 0);
1097 if (retval < 0) {
1098 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1099 "request for the adapter %s.\n",
1100 zfcp_get_busid_by_adapter(adapter));
1101 /* temporary fix to avoid status read buffer shortage */
1102 adapter->status_read_failed++;
1103 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1104 < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1105 ZFCP_LOG_INFO("restart adapter %s due to status read "
1106 "buffer shortage\n",
1107 zfcp_get_busid_by_adapter(adapter));
1108 zfcp_erp_adapter_reopen(adapter, 0);
1109 }
1110 }
1111 out:
1112 return retval;
1113}
1114
1115/*
1116 * function: zfcp_fsf_abort_fcp_command
1117 *
1118 * purpose: tells FSF to abort a running SCSI command
1119 *
1120 * returns: address of initiated FSF request
1121 * NULL - request could not be initiated
1122 *
1123 * FIXME(design): should be watched by a timeout !!!
1124 * FIXME(design) shouldn't this be modified to return an int
1125 * also...don't know how though
1126 */
1127struct zfcp_fsf_req *
1128zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1129 struct zfcp_adapter *adapter,
1130 struct zfcp_unit *unit, int req_flags)
1131{
1132 volatile struct qdio_buffer_element *sbale;
1133 unsigned long lock_flags;
1134 struct zfcp_fsf_req *fsf_req = NULL;
1135 int retval = 0;
1136
1137 /* setup new FSF request */
1138 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1139 req_flags, adapter->pool.fsf_req_abort,
1140 &lock_flags, &fsf_req);
1141 if (retval < 0) {
1142 ZFCP_LOG_INFO("error: Failed to create an abort command "
1143 "request for lun 0x%016Lx on port 0x%016Lx "
1144 "on adapter %s.\n",
1145 unit->fcp_lun,
1146 unit->port->wwpn,
1147 zfcp_get_busid_by_adapter(adapter));
1148 goto out;
1149 }
1150
1151 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1152 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1153 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1154
1155 fsf_req->data.abort_fcp_command.unit = unit;
1156
1157 /* set handles of unit and its parent port in QTCB */
1158 fsf_req->qtcb->header.lun_handle = unit->handle;
1159 fsf_req->qtcb->header.port_handle = unit->port->handle;
1160
1161 /* set handle of request which should be aborted */
1162 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1163
1164 /* start QDIO request for this FSF request */
1165
1166 zfcp_fsf_start_scsi_er_timer(adapter);
1167 retval = zfcp_fsf_req_send(fsf_req, NULL);
1168 if (retval) {
1169 del_timer(&adapter->scsi_er_timer);
1170 ZFCP_LOG_INFO("error: Failed to send abort command request "
1171 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1172 zfcp_get_busid_by_adapter(adapter),
1173 unit->port->wwpn, unit->fcp_lun);
1174 zfcp_fsf_req_free(fsf_req);
1175 fsf_req = NULL;
1176 goto out;
1177 }
1178
1179 ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1180 "(adapter%s, port d_id=0x%08x, "
1181 "unit x%016Lx, old_req_id=0x%lx)\n",
1182 zfcp_get_busid_by_adapter(adapter),
1183 unit->port->d_id,
1184 unit->fcp_lun, old_req_id);
1185 out:
1186 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1187 return fsf_req;
1188}
1189
1190/*
1191 * function: zfcp_fsf_abort_fcp_command_handler
1192 *
1193 * purpose: is called for finished Abort FCP Command request
1194 *
1195 * returns:
1196 */
1197static int
1198zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1199{
1200 int retval = -EINVAL;
1201 struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit;
1202 unsigned char status_qual =
1203 new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1204
1205 del_timer(&new_fsf_req->adapter->scsi_er_timer);
1206
1207 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1208 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1209 goto skip_fsfstatus;
1210 }
1211
1212 /* evaluate FSF status in QTCB */
1213 switch (new_fsf_req->qtcb->header.fsf_status) {
1214
1215 case FSF_PORT_HANDLE_NOT_VALID:
1216 if (status_qual >> 4 != status_qual % 0xf) {
1217 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1218 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1219 "fsf_s_phand_nv0");
1220 /*
1221 * In this case a command that was sent prior to a port
1222 * reopen was aborted (handles are different). This is
1223 * fine.
1224 */
1225 } else {
1226 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
1227 ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1228 "port 0x%016Lx on adapter %s invalid. "
1229 "This may happen occasionally.\n",
1230 unit->port->handle,
1231 unit->port->wwpn,
1232 zfcp_get_busid_by_unit(unit));
1233 ZFCP_LOG_INFO("status qualifier:\n");
1234 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1235 (char *) &new_fsf_req->qtcb->header.
1236 fsf_status_qual,
1237 sizeof (union fsf_status_qual));
1238 /* Let's hope this sorts out the mess */
1239 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1240 "fsf_s_phand_nv1");
1241 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1242 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1243 }
1244 break;
1245
1246 case FSF_LUN_HANDLE_NOT_VALID:
1247 if (status_qual >> 4 != status_qual % 0xf) {
1248 /* 2 */
1249 ZFCP_LOG_FLAGS(0, "FSF_LUN_HANDLE_NOT_VALID\n");
1250 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1251 "fsf_s_lhand_nv0");
1252 /*
1253 * In this case a command that was sent prior to a unit
1254 * reopen was aborted (handles are different).
1255 * This is fine.
1256 */
1257 } else {
1258 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
1259 ZFCP_LOG_INFO
1260 ("Warning: Temporary LUN identifier 0x%x of LUN "
1261 "0x%016Lx on port 0x%016Lx on adapter %s is "
1262 "invalid. This may happen in rare cases. "
1263 "Trying to re-establish link.\n",
1264 unit->handle,
1265 unit->fcp_lun,
1266 unit->port->wwpn,
1267 zfcp_get_busid_by_unit(unit));
1268 ZFCP_LOG_DEBUG("Status qualifier data:\n");
1269 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1270 (char *) &new_fsf_req->qtcb->header.
1271 fsf_status_qual,
1272 sizeof (union fsf_status_qual));
1273 /* Let's hope this sorts out the mess */
1274 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1275 "fsf_s_lhand_nv1");
1276 zfcp_erp_port_reopen(unit->port, 0);
1277 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1278 }
1279 break;
1280
1281 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1282 ZFCP_LOG_FLAGS(2, "FSF_FCP_COMMAND_DOES_NOT_EXIST\n");
1283 retval = 0;
1284 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1285 "fsf_s_no_exist");
1286 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1287 break;
1288
1289 case FSF_PORT_BOXED:
1290 /* 2 */
1291 ZFCP_LOG_FLAGS(0, "FSF_PORT_BOXED\n");
1292 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1293 "be reopened\n", unit->port->wwpn,
1294 zfcp_get_busid_by_unit(unit));
1295 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1296 "fsf_s_pboxed");
1297 zfcp_erp_port_reopen(unit->port, 0);
1298 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1299 | ZFCP_STATUS_FSFREQ_RETRY;
1300 break;
1301
1302 case FSF_LUN_BOXED:
1303 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
1304 ZFCP_LOG_INFO(
1305 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1306 "to be reopened\n",
1307 unit->fcp_lun, unit->port->wwpn,
1308 zfcp_get_busid_by_unit(unit));
1309 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1310 zfcp_erp_unit_reopen(unit, 0);
1311 zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req,
1312 &new_fsf_req->qtcb->header.fsf_status_qual,
1313 sizeof(union fsf_status_qual));
1314 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1315 | ZFCP_STATUS_FSFREQ_RETRY;
1316 break;
1317
1318 case FSF_ADAPTER_STATUS_AVAILABLE:
1319 /* 2 */
1320 ZFCP_LOG_FLAGS(0, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1321 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1322 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1323 ZFCP_LOG_FLAGS(2,
1324 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1325 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1326 "fsf_sq_ltest");
1327 /* reopening link to port */
1328 zfcp_erp_port_reopen(unit->port, 0);
1329 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1330 break;
1331 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1332 ZFCP_LOG_FLAGS(2,
1333 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1334 /* SCSI stack will escalate */
1335 debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1336 "fsf_sq_ulp");
1337 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1338 break;
1339 default:
1340 ZFCP_LOG_NORMAL
1341 ("bug: Wrong status qualifier 0x%x arrived.\n",
1342 new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1343 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1344 "fsf_sq_inval:");
1345 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1346 &new_fsf_req->qtcb->header.
1347 fsf_status_qual.word[0], sizeof (u32));
1348 break;
1349 }
1350 break;
1351
1352 case FSF_GOOD:
1353 /* 3 */
1354 ZFCP_LOG_FLAGS(0, "FSF_GOOD\n");
1355 retval = 0;
1356 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1357 break;
1358
1359 default:
1360 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1361 "(debug info 0x%x)\n",
1362 new_fsf_req->qtcb->header.fsf_status);
1363 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1364 "fsf_s_inval:");
1365 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1366 &new_fsf_req->qtcb->header.fsf_status,
1367 sizeof (u32));
1368 break;
1369 }
1370 skip_fsfstatus:
1371 return retval;
1372}
1373
1374/**
1375 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1376 * one SBALE
1377 * Two scatter-gather lists are passed, one for the reqeust and one for the
1378 * response.
1379 */
1380static inline int
1381zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1382 struct scatterlist *resp, int resp_count)
1383{
1384 return ((req_count == 1) &&
1385 (resp_count == 1) &&
1386 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1387 PAGE_MASK) ==
1388 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1389 req[0].length - 1) & PAGE_MASK)) &&
1390 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1391 PAGE_MASK) ==
1392 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1393 resp[0].length - 1) & PAGE_MASK)));
1394}
1395
1396/**
1397 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1398 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1399 * the request
1400 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1401 * a struct zfcp_fsf_req
1402 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1403 * is sent within error recovery
1404 */
1405int
1406zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1407 struct zfcp_erp_action *erp_action)
1408{
1409 volatile struct qdio_buffer_element *sbale;
1410 struct zfcp_port *port;
1411 struct zfcp_adapter *adapter;
1412 struct zfcp_fsf_req *fsf_req;
1413 unsigned long lock_flags;
1414 int bytes;
1415 int ret = 0;
1416
1417 port = ct->port;
1418 adapter = port->adapter;
1419
1420 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1421 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1422 pool, &lock_flags, &fsf_req);
1423 if (ret < 0) {
1424 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1425 "adapter: %s\n",
1426 zfcp_get_busid_by_adapter(adapter));
1427 goto failed_req;
1428 }
1429
1430 if (erp_action != NULL) {
1431 erp_action->fsf_req = fsf_req;
1432 fsf_req->erp_action = erp_action;
1433 }
1434
1435 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1436 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1437 ct->resp, ct->resp_count)){
1438 /* both request buffer and response buffer
1439 fit into one sbale each */
1440 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1441 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1442 sbale[2].length = ct->req[0].length;
1443 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1444 sbale[3].length = ct->resp[0].length;
1445 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1446 } else if (adapter->supported_features &
1447 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1448 /* try to use chained SBALs */
1449 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1450 SBAL_FLAGS0_TYPE_WRITE_READ,
1451 ct->req, ct->req_count,
1452 ZFCP_MAX_SBALS_PER_CT_REQ);
1453 if (bytes <= 0) {
1454 ZFCP_LOG_INFO("error: creation of CT request failed "
1455 "on adapter %s\n",
1456 zfcp_get_busid_by_adapter(adapter));
1457 if (bytes == 0)
1458 ret = -ENOMEM;
1459 else
1460 ret = bytes;
1461
1462 goto failed_send;
1463 }
1464 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1465 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1466 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1467 SBAL_FLAGS0_TYPE_WRITE_READ,
1468 ct->resp, ct->resp_count,
1469 ZFCP_MAX_SBALS_PER_CT_REQ);
1470 if (bytes <= 0) {
1471 ZFCP_LOG_INFO("error: creation of CT request failed "
1472 "on adapter %s\n",
1473 zfcp_get_busid_by_adapter(adapter));
1474 if (bytes == 0)
1475 ret = -ENOMEM;
1476 else
1477 ret = bytes;
1478
1479 goto failed_send;
1480 }
1481 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1482 } else {
1483 /* reject send generic request */
1484 ZFCP_LOG_INFO(
1485 "error: microcode does not support chained SBALs,"
1486 "CT request too big (adapter %s)\n",
1487 zfcp_get_busid_by_adapter(adapter));
1488 ret = -EOPNOTSUPP;
1489 goto failed_send;
1490 }
1491
1492 /* settings in QTCB */
1493 fsf_req->qtcb->header.port_handle = port->handle;
1494 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1495 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1496 fsf_req->data.send_ct = ct;
1497
1498 /* start QDIO request for this FSF request */
1499 ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1500 if (ret) {
1501 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1502 "(adapter %s, port 0x%016Lx)\n",
1503 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1504 goto failed_send;
1505 }
1506
1507 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1508 zfcp_get_busid_by_adapter(adapter), port->wwpn);
1509 goto out;
1510
1511 failed_send:
1512 zfcp_fsf_req_free(fsf_req);
1513 if (erp_action != NULL) {
1514 erp_action->fsf_req = NULL;
1515 }
1516 failed_req:
1517 out:
1518 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1519 lock_flags);
1520 return ret;
1521}
1522
1523/**
1524 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1525 * @fsf_req: pointer to struct zfcp_fsf_req
1526 *
1527 * Data specific for the Generic Service request is passed by
1528 * fsf_req->data.send_ct
1529 * Usually a specific handler for the request is called via
1530 * fsf_req->data.send_ct->handler at end of this function.
1531 */
1532static int
1533zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1534{
1535 struct zfcp_port *port;
1536 struct zfcp_adapter *adapter;
1537 struct zfcp_send_ct *send_ct;
1538 struct fsf_qtcb_header *header;
1539 struct fsf_qtcb_bottom_support *bottom;
1540 int retval = -EINVAL;
1541 u16 subtable, rule, counter;
1542
1543 adapter = fsf_req->adapter;
1544 send_ct = fsf_req->data.send_ct;
1545 port = send_ct->port;
1546 header = &fsf_req->qtcb->header;
1547 bottom = &fsf_req->qtcb->bottom.support;
1548
1549 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1550 goto skip_fsfstatus;
1551
1552 /* evaluate FSF status in QTCB */
1553 switch (header->fsf_status) {
1554
1555 case FSF_GOOD:
1556 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
1557 retval = 0;
1558 break;
1559
1560 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1561 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1562 if (adapter->fc_service_class <= 3) {
1563 ZFCP_LOG_INFO("error: adapter %s does not support fc "
1564 "class %d.\n",
1565 zfcp_get_busid_by_port(port),
1566 adapter->fc_service_class);
1567 } else {
1568 ZFCP_LOG_INFO("bug: The fibre channel class at the "
1569 "adapter %s is invalid. "
1570 "(debug info %d)\n",
1571 zfcp_get_busid_by_port(port),
1572 adapter->fc_service_class);
1573 }
1574 /* stop operation for this adapter */
1575 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1576 zfcp_erp_adapter_shutdown(adapter, 0);
1577 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1578 break;
1579
1580 case FSF_ADAPTER_STATUS_AVAILABLE:
1581 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1582 switch (header->fsf_status_qual.word[0]){
1583 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1584 ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1585 /* reopening link to port */
1586 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1587 zfcp_test_link(port);
1588 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1589 break;
1590 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1591 ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1592 /* ERP strategy will escalate */
1593 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595 break;
1596 default:
1597 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1598 "arrived.\n",
1599 header->fsf_status_qual.word[0]);
1600 break;
1601 }
1602 break;
1603
1604 case FSF_ACCESS_DENIED:
1605 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1606 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1607 "command (adapter %s, port d_id=0x%08x)\n",
1608 zfcp_get_busid_by_port(port), port->d_id);
1609 for (counter = 0; counter < 2; counter++) {
1610 subtable = header->fsf_status_qual.halfword[counter * 2];
1611 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1612 switch (subtable) {
1613 case FSF_SQ_CFDC_SUBTABLE_OS:
1614 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1615 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1616 case FSF_SQ_CFDC_SUBTABLE_LUN:
1617 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1618 zfcp_act_subtable_type[subtable], rule);
1619 break;
1620 }
1621 }
1622 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1623 zfcp_erp_port_access_denied(port);
1624 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1625 break;
1626
1627 case FSF_GENERIC_COMMAND_REJECTED:
1628 ZFCP_LOG_FLAGS(2, "FSF_GENERIC_COMMAND_REJECTED\n");
1629 ZFCP_LOG_INFO("generic service command rejected "
1630 "(adapter %s, port d_id=0x%08x)\n",
1631 zfcp_get_busid_by_port(port), port->d_id);
1632 ZFCP_LOG_INFO("status qualifier:\n");
1633 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1634 (char *) &header->fsf_status_qual,
1635 sizeof (union fsf_status_qual));
1636 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1637 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1638 break;
1639
1640 case FSF_PORT_HANDLE_NOT_VALID:
1641 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1642 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1643 "0x%016Lx on adapter %s invalid. This may "
1644 "happen occasionally.\n", port->handle,
1645 port->wwpn, zfcp_get_busid_by_port(port));
1646 ZFCP_LOG_INFO("status qualifier:\n");
1647 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1648 (char *) &header->fsf_status_qual,
1649 sizeof (union fsf_status_qual));
1650 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1651 zfcp_erp_adapter_reopen(adapter, 0);
1652 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1653 break;
1654
1655 case FSF_PORT_BOXED:
1656 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
1657 ZFCP_LOG_INFO("port needs to be reopened "
1658 "(adapter %s, port d_id=0x%08x)\n",
1659 zfcp_get_busid_by_port(port), port->d_id);
1660 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1661 zfcp_erp_port_reopen(port, 0);
1662 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1663 | ZFCP_STATUS_FSFREQ_RETRY;
1664 break;
1665
1666 /* following states should never occure, all cases avoided
1667 in zfcp_fsf_send_ct - but who knows ... */
1668 case FSF_PAYLOAD_SIZE_MISMATCH:
1669 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1670 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1671 "req_buf_length=%d, resp_buf_length=%d)\n",
1672 zfcp_get_busid_by_adapter(adapter),
1673 bottom->req_buf_length, bottom->resp_buf_length);
1674 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1675 break;
1676 case FSF_REQUEST_SIZE_TOO_LARGE:
1677 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1678 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1679 "req_buf_length=%d)\n",
1680 zfcp_get_busid_by_adapter(adapter),
1681 bottom->req_buf_length);
1682 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1683 break;
1684 case FSF_RESPONSE_SIZE_TOO_LARGE:
1685 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1686 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1687 "resp_buf_length=%d)\n",
1688 zfcp_get_busid_by_adapter(adapter),
1689 bottom->resp_buf_length);
1690 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1691 break;
1692 case FSF_SBAL_MISMATCH:
1693 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1694 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1695 "resp_buf_length=%d)\n",
1696 zfcp_get_busid_by_adapter(adapter),
1697 bottom->req_buf_length, bottom->resp_buf_length);
1698 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1699 break;
1700
1701 default:
1702 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1703 "(debug info 0x%x)\n", header->fsf_status);
1704 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1705 debug_exception(adapter->erp_dbf, 0,
1706 &header->fsf_status_qual.word[0], sizeof (u32));
1707 break;
1708 }
1709
1710skip_fsfstatus:
1711 send_ct->status = retval;
1712
1713 if (send_ct->handler != NULL)
1714 send_ct->handler(send_ct->handler_data);
1715
1716 return retval;
1717}
1718
1719/**
1720 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1721 * @els: pointer to struct zfcp_send_els which contains all needed data for
1722 * the command.
1723 */
1724int
1725zfcp_fsf_send_els(struct zfcp_send_els *els)
1726{
1727 volatile struct qdio_buffer_element *sbale;
1728 struct zfcp_fsf_req *fsf_req;
1729 fc_id_t d_id;
1730 struct zfcp_adapter *adapter;
1731 unsigned long lock_flags;
1732 int bytes;
1733 int ret = 0;
1734
1735 d_id = els->d_id;
1736 adapter = els->adapter;
1737
1738 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1739 ZFCP_REQ_AUTO_CLEANUP,
1740 NULL, &lock_flags, &fsf_req);
1741 if (ret < 0) {
1742 ZFCP_LOG_INFO("error: creation of ELS request failed "
1743 "(adapter %s, port d_id: 0x%08x)\n",
1744 zfcp_get_busid_by_adapter(adapter), d_id);
1745 goto failed_req;
1746 }
1747
1748 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1749 if (zfcp_use_one_sbal(els->req, els->req_count,
1750 els->resp, els->resp_count)){
1751 /* both request buffer and response buffer
1752 fit into one sbale each */
1753 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1754 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1755 sbale[2].length = els->req[0].length;
1756 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1757 sbale[3].length = els->resp[0].length;
1758 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1759 } else if (adapter->supported_features &
1760 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1761 /* try to use chained SBALs */
1762 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1763 SBAL_FLAGS0_TYPE_WRITE_READ,
1764 els->req, els->req_count,
1765 ZFCP_MAX_SBALS_PER_ELS_REQ);
1766 if (bytes <= 0) {
1767 ZFCP_LOG_INFO("error: creation of ELS request failed "
1768 "(adapter %s, port d_id: 0x%08x)\n",
1769 zfcp_get_busid_by_adapter(adapter), d_id);
1770 if (bytes == 0) {
1771 ret = -ENOMEM;
1772 } else {
1773 ret = bytes;
1774 }
1775 goto failed_send;
1776 }
1777 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1778 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1779 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1780 SBAL_FLAGS0_TYPE_WRITE_READ,
1781 els->resp, els->resp_count,
1782 ZFCP_MAX_SBALS_PER_ELS_REQ);
1783 if (bytes <= 0) {
1784 ZFCP_LOG_INFO("error: creation of ELS request failed "
1785 "(adapter %s, port d_id: 0x%08x)\n",
1786 zfcp_get_busid_by_adapter(adapter), d_id);
1787 if (bytes == 0) {
1788 ret = -ENOMEM;
1789 } else {
1790 ret = bytes;
1791 }
1792 goto failed_send;
1793 }
1794 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1795 } else {
1796 /* reject request */
1797 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1798 ", ELS request too big (adapter %s, "
1799 "port d_id: 0x%08x)\n",
1800 zfcp_get_busid_by_adapter(adapter), d_id);
1801 ret = -EOPNOTSUPP;
1802 goto failed_send;
1803 }
1804
1805 /* settings in QTCB */
1806 fsf_req->qtcb->bottom.support.d_id = d_id;
1807 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1808 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1809 fsf_req->data.send_els = els;
1810
1811 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1812
1813 /* start QDIO request for this FSF request */
1814 ret = zfcp_fsf_req_send(fsf_req, els->timer);
1815 if (ret) {
1816 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1817 "(adapter %s, port d_id: 0x%08x)\n",
1818 zfcp_get_busid_by_adapter(adapter), d_id);
1819 goto failed_send;
1820 }
1821
1822 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1823 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1824 goto out;
1825
1826 failed_send:
1827 zfcp_fsf_req_free(fsf_req);
1828
1829 failed_req:
1830 out:
1831 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1832 lock_flags);
1833
1834 return ret;
1835}
1836
1837/**
1838 * zfcp_fsf_send_els_handler - handler for ELS commands
1839 * @fsf_req: pointer to struct zfcp_fsf_req
1840 *
1841 * Data specific for the ELS command is passed by
1842 * fsf_req->data.send_els
1843 * Usually a specific handler for the command is called via
1844 * fsf_req->data.send_els->handler at end of this function.
1845 */
1846static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1847{
1848 struct zfcp_adapter *adapter;
1849 fc_id_t d_id;
1850 struct zfcp_port *port;
1851 struct fsf_qtcb_header *header;
1852 struct fsf_qtcb_bottom_support *bottom;
1853 struct zfcp_send_els *send_els;
1854 int retval = -EINVAL;
1855 u16 subtable, rule, counter;
1856
1857 send_els = fsf_req->data.send_els;
1858 adapter = send_els->adapter;
1859 d_id = send_els->d_id;
1860 header = &fsf_req->qtcb->header;
1861 bottom = &fsf_req->qtcb->bottom.support;
1862
1863 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1864 goto skip_fsfstatus;
1865
1866 switch (header->fsf_status) {
1867
1868 case FSF_GOOD:
1869 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
1870 retval = 0;
1871 break;
1872
1873 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1874 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1875 if (adapter->fc_service_class <= 3) {
1876 ZFCP_LOG_INFO("error: adapter %s does "
1877 "not support fibrechannel class %d.\n",
1878 zfcp_get_busid_by_adapter(adapter),
1879 adapter->fc_service_class);
1880 } else {
1881 ZFCP_LOG_INFO("bug: The fibrechannel class at "
1882 "adapter %s is invalid. "
1883 "(debug info %d)\n",
1884 zfcp_get_busid_by_adapter(adapter),
1885 adapter->fc_service_class);
1886 }
1887 /* stop operation for this adapter */
1888 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1889 zfcp_erp_adapter_shutdown(adapter, 0);
1890 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1891 break;
1892
1893 case FSF_ADAPTER_STATUS_AVAILABLE:
1894 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1895 switch (header->fsf_status_qual.word[0]){
1896 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1897 ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1898 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1899 if (send_els->ls_code != ZFCP_LS_ADISC) {
1900 read_lock(&zfcp_data.config_lock);
1901 port = zfcp_get_port_by_did(adapter, d_id);
1902 if (port)
1903 zfcp_test_link(port);
1904 read_unlock(&zfcp_data.config_lock);
1905 }
1906 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1907 break;
1908 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1909 ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1910 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1911 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912 retval =
1913 zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1914 (struct zfcp_ls_rjt_par *)
1915 &header->fsf_status_qual.word[2]);
1916 break;
1917 case FSF_SQ_RETRY_IF_POSSIBLE:
1918 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
1919 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1920 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921 break;
1922 default:
1923 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1924 header->fsf_status_qual.word[0]);
1925 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1926 (char*)header->fsf_status_qual.word, 16);
1927 }
1928 break;
1929
1930 case FSF_ELS_COMMAND_REJECTED:
1931 ZFCP_LOG_FLAGS(2, "FSF_ELS_COMMAND_REJECTED\n");
1932 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1933 "prohibited sending "
1934 "(adapter: %s, port d_id: 0x%08x)\n",
1935 zfcp_get_busid_by_adapter(adapter), d_id);
1936
1937 break;
1938
1939 case FSF_PAYLOAD_SIZE_MISMATCH:
1940 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1941 ZFCP_LOG_INFO(
1942 "ELS request size and ELS response size must be either "
1943 "both 0, or both greater than 0 "
1944 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1945 zfcp_get_busid_by_adapter(adapter),
1946 bottom->req_buf_length,
1947 bottom->resp_buf_length);
1948 break;
1949
1950 case FSF_REQUEST_SIZE_TOO_LARGE:
1951 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1952 ZFCP_LOG_INFO(
1953 "Length of the ELS request buffer, "
1954 "specified in QTCB bottom, "
1955 "exceeds the size of the buffers "
1956 "that have been allocated for ELS request data "
1957 "(adapter: %s, req_buf_length=%d)\n",
1958 zfcp_get_busid_by_adapter(adapter),
1959 bottom->req_buf_length);
1960 break;
1961
1962 case FSF_RESPONSE_SIZE_TOO_LARGE:
1963 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1964 ZFCP_LOG_INFO(
1965 "Length of the ELS response buffer, "
1966 "specified in QTCB bottom, "
1967 "exceeds the size of the buffers "
1968 "that have been allocated for ELS response data "
1969 "(adapter: %s, resp_buf_length=%d)\n",
1970 zfcp_get_busid_by_adapter(adapter),
1971 bottom->resp_buf_length);
1972 break;
1973
1974 case FSF_SBAL_MISMATCH:
1975 /* should never occure, avoided in zfcp_fsf_send_els */
1976 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1977 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1978 "resp_buf_length=%d)\n",
1979 zfcp_get_busid_by_adapter(adapter),
1980 bottom->req_buf_length, bottom->resp_buf_length);
1981 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1982 break;
1983
1984 case FSF_ACCESS_DENIED:
1985 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1986 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1987 "(adapter %s, port d_id=0x%08x)\n",
1988 zfcp_get_busid_by_adapter(adapter), d_id);
1989 for (counter = 0; counter < 2; counter++) {
1990 subtable = header->fsf_status_qual.halfword[counter * 2];
1991 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1992 switch (subtable) {
1993 case FSF_SQ_CFDC_SUBTABLE_OS:
1994 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1995 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1996 case FSF_SQ_CFDC_SUBTABLE_LUN:
1997 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1998 zfcp_act_subtable_type[subtable], rule);
1999 break;
2000 }
2001 }
2002 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
2003 read_lock(&zfcp_data.config_lock);
2004 port = zfcp_get_port_by_did(adapter, d_id);
2005 if (port != NULL)
2006 zfcp_erp_port_access_denied(port);
2007 read_unlock(&zfcp_data.config_lock);
2008 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2009 break;
2010
2011 default:
2012 ZFCP_LOG_NORMAL(
2013 "bug: An unknown FSF Status was presented "
2014 "(adapter: %s, fsf_status=0x%08x)\n",
2015 zfcp_get_busid_by_adapter(adapter),
2016 header->fsf_status);
2017 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
2018 debug_exception(adapter->erp_dbf, 0,
2019 &header->fsf_status_qual.word[0], sizeof(u32));
2020 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2021 break;
2022 }
2023
2024skip_fsfstatus:
2025 send_els->status = retval;
2026
2027 if (send_els->handler != 0)
2028 send_els->handler(send_els->handler_data);
2029
2030 return retval;
2031}
2032
2033/*
2034 * function:
2035 *
2036 * purpose:
2037 *
2038 * returns: address of initiated FSF request
2039 * NULL - request could not be initiated
2040 */
2041int
2042zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
2043{
2044 volatile struct qdio_buffer_element *sbale;
2045 unsigned long lock_flags;
2046 int retval = 0;
2047
2048 /* setup new FSF request */
2049 retval = zfcp_fsf_req_create(erp_action->adapter,
2050 FSF_QTCB_EXCHANGE_CONFIG_DATA,
2051 ZFCP_REQ_AUTO_CLEANUP,
2052 erp_action->adapter->pool.fsf_req_erp,
2053 &lock_flags, &(erp_action->fsf_req));
2054 if (retval < 0) {
2055 ZFCP_LOG_INFO("error: Could not create exchange configuration "
2056 "data request for adapter %s.\n",
2057 zfcp_get_busid_by_adapter(erp_action->adapter));
2058 goto out;
2059 }
2060
2061 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2062 erp_action->fsf_req->sbal_curr, 0);
2063 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2064 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2065
2066 erp_action->fsf_req->erp_action = erp_action;
2067 erp_action->fsf_req->qtcb->bottom.config.feature_selection =
2068 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
2069
2070 /* start QDIO request for this FSF request */
2071 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2072 if (retval) {
2073 ZFCP_LOG_INFO
2074 ("error: Could not send exchange configuration data "
2075 "command on the adapter %s\n",
2076 zfcp_get_busid_by_adapter(erp_action->adapter));
2077 zfcp_fsf_req_free(erp_action->fsf_req);
2078 erp_action->fsf_req = NULL;
2079 goto out;
2080 }
2081
2082 ZFCP_LOG_DEBUG("exchange configuration data request initiated "
2083 "(adapter %s)\n",
2084 zfcp_get_busid_by_adapter(erp_action->adapter));
2085
2086 out:
2087 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2088 lock_flags);
2089 return retval;
2090}
2091
2092/**
2093 * zfcp_fsf_exchange_config_evaluate
2094 * @fsf_req: fsf_req which belongs to xchg config data request
2095 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2096 *
2097 * returns: -EIO on error, 0 otherwise
2098 */
2099static int
2100zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2101{
2102 struct fsf_qtcb_bottom_config *bottom;
2103 struct zfcp_adapter *adapter = fsf_req->adapter;
2104
2105 bottom = &fsf_req->qtcb->bottom.config;
2106 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2107 bottom->low_qtcb_version, bottom->high_qtcb_version);
2108 adapter->fsf_lic_version = bottom->lic_version;
2109 adapter->supported_features = bottom->supported_features;
2110
2111 if (xchg_ok) {
2112 adapter->wwnn = bottom->nport_serv_param.wwnn;
2113 adapter->wwpn = bottom->nport_serv_param.wwpn;
2114 adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
2115 adapter->fc_topology = bottom->fc_topology;
2116 adapter->fc_link_speed = bottom->fc_link_speed;
2117 adapter->hydra_version = bottom->adapter_type;
2118 } else {
2119 adapter->wwnn = 0;
2120 adapter->wwpn = 0;
2121 adapter->s_id = 0;
2122 adapter->fc_topology = 0;
2123 adapter->fc_link_speed = 0;
2124 adapter->hydra_version = 0;
2125 }
2126
2127 if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
2128 adapter->hardware_version = bottom->hardware_version;
2129 memcpy(adapter->serial_number, bottom->serial_number, 17);
2130 EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
2131 }
2132
2133 ZFCP_LOG_INFO("The adapter %s reported the following characteristics:\n"
2134 "WWNN 0x%016Lx, "
2135 "WWPN 0x%016Lx, "
2136 "S_ID 0x%08x,\n"
2137 "adapter version 0x%x, "
2138 "LIC version 0x%x, "
2139 "FC link speed %d Gb/s\n",
2140 zfcp_get_busid_by_adapter(adapter),
2141 adapter->wwnn,
2142 adapter->wwpn,
2143 (unsigned int) adapter->s_id,
2144 adapter->hydra_version,
2145 adapter->fsf_lic_version,
2146 adapter->fc_link_speed);
2147 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2148 ZFCP_LOG_NORMAL("error: the adapter %s "
2149 "only supports newer control block "
2150 "versions in comparison to this device "
2151 "driver (try updated device driver)\n",
2152 zfcp_get_busid_by_adapter(adapter));
2153 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2154 zfcp_erp_adapter_shutdown(adapter, 0);
2155 return -EIO;
2156 }
2157 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2158 ZFCP_LOG_NORMAL("error: the adapter %s "
2159 "only supports older control block "
2160 "versions than this device driver uses"
2161 "(consider a microcode upgrade)\n",
2162 zfcp_get_busid_by_adapter(adapter));
2163 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2164 zfcp_erp_adapter_shutdown(adapter, 0);
2165 return -EIO;
2166 }
2167 return 0;
2168}
2169
2170/*
2171 * function: zfcp_fsf_exchange_config_data_handler
2172 *
2173 * purpose: is called for finished Exchange Configuration Data command
2174 *
2175 * returns:
2176 */
2177static int
2178zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2179{
2180 struct fsf_qtcb_bottom_config *bottom;
2181 struct zfcp_adapter *adapter = fsf_req->adapter;
2182
2183 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2184 return -EIO;
2185
2186 switch (fsf_req->qtcb->header.fsf_status) {
2187
2188 case FSF_GOOD:
2189 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
2190
2191 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2192 return -EIO;
2193
2194 switch (adapter->fc_topology) {
2195 case FSF_TOPO_P2P:
2196 ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n");
2197 ZFCP_LOG_NORMAL("error: Point-to-point fibrechannel "
2198 "configuration detected at adapter %s "
2199 "unsupported, shutting down adapter\n",
2200 zfcp_get_busid_by_adapter(adapter));
2201 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2202 "top-p-to-p");
2203 zfcp_erp_adapter_shutdown(adapter, 0);
2204 return -EIO;
2205 case FSF_TOPO_AL:
2206 ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n");
2207 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2208 "topology detected at adapter %s "
2209 "unsupported, shutting down adapter\n",
2210 zfcp_get_busid_by_adapter(adapter));
2211 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2212 "top-al");
2213 zfcp_erp_adapter_shutdown(adapter, 0);
2214 return -EIO;
2215 case FSF_TOPO_FABRIC:
2216 ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n");
2217 ZFCP_LOG_INFO("Switched fabric fibrechannel "
2218 "network detected at adapter %s.\n",
2219 zfcp_get_busid_by_adapter(adapter));
2220 break;
2221 default:
2222 ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2223 "reported by the exchange "
2224 "configuration command for "
2225 "the adapter %s is not "
2226 "of a type known to the zfcp "
2227 "driver, shutting down adapter\n",
2228 zfcp_get_busid_by_adapter(adapter));
2229 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2230 "unknown-topo");
2231 zfcp_erp_adapter_shutdown(adapter, 0);
2232 return -EIO;
2233 }
2234 bottom = &fsf_req->qtcb->bottom.config;
2235 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2236 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2237 "allowed by the adapter %s "
2238 "is lower than the minimum "
2239 "required by the driver (%ld bytes).\n",
2240 bottom->max_qtcb_size,
2241 zfcp_get_busid_by_adapter(adapter),
2242 sizeof(struct fsf_qtcb));
2243 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2244 "qtcb-size");
2245 debug_event(fsf_req->adapter->erp_dbf, 0,
2246 &bottom->max_qtcb_size, sizeof (u32));
2247 zfcp_erp_adapter_shutdown(adapter, 0);
2248 return -EIO;
2249 }
2250 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2251 &adapter->status);
2252 break;
2253 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2254 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2255
2256 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2257 return -EIO;
2258
2259 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2260 zfcp_get_busid_by_adapter(adapter));
2261 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2262 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2263 &adapter->status);
2264 zfcp_erp_adapter_failed(adapter);
2265 break;
2266 default:
2267 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2268 debug_event(fsf_req->adapter->erp_dbf, 0,
2269 &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2270 zfcp_erp_adapter_shutdown(adapter, 0);
2271 return -EIO;
2272 }
2273 return 0;
2274}
2275
2276/**
2277 * zfcp_fsf_exchange_port_data - request information about local port
2278 * @adapter: for which port data is requested
2279 * @data: response to exchange port data request
2280 */
2281int
2282zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2283 struct fsf_qtcb_bottom_port *data)
2284{
2285 volatile struct qdio_buffer_element *sbale;
2286 int retval = 0;
2287 unsigned long lock_flags;
2288 struct zfcp_fsf_req *fsf_req;
2289 struct timer_list *timer;
2290
2291 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2292 ZFCP_LOG_INFO("error: exchange port data "
2293 "command not supported by adapter %s\n",
2294 zfcp_get_busid_by_adapter(adapter));
2295 return -EOPNOTSUPP;
2296 }
2297
2298 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2299 if (!timer)
2300 return -ENOMEM;
2301
2302 /* setup new FSF request */
2303 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2304 0, 0, &lock_flags, &fsf_req);
2305 if (retval < 0) {
2306 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2307 "exchange port data request for"
2308 "the adapter %s.\n",
2309 zfcp_get_busid_by_adapter(adapter));
2310 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2311 lock_flags);
2312 goto out;
2313 }
2314
2315 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2316 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2317 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2318
2319 fsf_req->data.port_data = data;
2320
2321 init_timer(timer);
2322 timer->function = zfcp_fsf_request_timeout_handler;
2323 timer->data = (unsigned long) adapter;
2324 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2325
2326 retval = zfcp_fsf_req_send(fsf_req, timer);
2327 if (retval) {
2328 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2329 "command on the adapter %s\n",
2330 zfcp_get_busid_by_adapter(adapter));
2331 zfcp_fsf_req_free(fsf_req);
2332 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2333 lock_flags);
2334 goto out;
2335 }
2336
2337 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2338 zfcp_get_busid_by_adapter(adapter));
2339
2340 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2341 lock_flags);
2342
2343 wait_event(fsf_req->completion_wq,
2344 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2345 del_timer_sync(timer);
2346 zfcp_fsf_req_cleanup(fsf_req);
2347 out:
2348 kfree(timer);
2349 return retval;
2350}
2351
2352
2353/**
2354 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2355 * @fsf_req: pointer to struct zfcp_fsf_req
2356 */
2357static void
2358zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2359{
2360 struct fsf_qtcb_bottom_port *bottom;
2361 struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
2362
2363 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2364 return;
2365
2366 switch (fsf_req->qtcb->header.fsf_status) {
2367 case FSF_GOOD:
2368 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
2369 bottom = &fsf_req->qtcb->bottom.port;
2370 memcpy(data, bottom, sizeof(*data));
2371 break;
2372
2373 default:
2374 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2375 debug_event(fsf_req->adapter->erp_dbf, 0,
2376 &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2377 }
2378}
2379
2380
2381/*
2382 * function: zfcp_fsf_open_port
2383 *
2384 * purpose:
2385 *
2386 * returns: address of initiated FSF request
2387 * NULL - request could not be initiated
2388 */
2389int
2390zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2391{
2392 volatile struct qdio_buffer_element *sbale;
2393 unsigned long lock_flags;
2394 int retval = 0;
2395
2396 /* setup new FSF request */
2397 retval = zfcp_fsf_req_create(erp_action->adapter,
2398 FSF_QTCB_OPEN_PORT_WITH_DID,
2399 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2400 erp_action->adapter->pool.fsf_req_erp,
2401 &lock_flags, &(erp_action->fsf_req));
2402 if (retval < 0) {
2403 ZFCP_LOG_INFO("error: Could not create open port request "
2404 "for port 0x%016Lx on adapter %s.\n",
2405 erp_action->port->wwpn,
2406 zfcp_get_busid_by_adapter(erp_action->adapter));
2407 goto out;
2408 }
2409
2410 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2411 erp_action->fsf_req->sbal_curr, 0);
2412 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2413 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2414
2415 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2416 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2417 erp_action->fsf_req->data.open_port.port = erp_action->port;
2418 erp_action->fsf_req->erp_action = erp_action;
2419
2420 /* start QDIO request for this FSF request */
2421 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2422 if (retval) {
2423 ZFCP_LOG_INFO("error: Could not send open port request for "
2424 "port 0x%016Lx on adapter %s.\n",
2425 erp_action->port->wwpn,
2426 zfcp_get_busid_by_adapter(erp_action->adapter));
2427 zfcp_fsf_req_free(erp_action->fsf_req);
2428 erp_action->fsf_req = NULL;
2429 goto out;
2430 }
2431
2432 ZFCP_LOG_DEBUG("open port request initiated "
2433 "(adapter %s, port 0x%016Lx)\n",
2434 zfcp_get_busid_by_adapter(erp_action->adapter),
2435 erp_action->port->wwpn);
2436 out:
2437 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2438 lock_flags);
2439 return retval;
2440}
2441
2442/*
2443 * function: zfcp_fsf_open_port_handler
2444 *
2445 * purpose: is called for finished Open Port command
2446 *
2447 * returns:
2448 */
2449static int
2450zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2451{
2452 int retval = -EINVAL;
2453 struct zfcp_port *port;
2454 struct fsf_plogi *plogi;
2455 struct fsf_qtcb_header *header;
2456 u16 subtable, rule, counter;
2457
2458 port = fsf_req->data.open_port.port;
2459 header = &fsf_req->qtcb->header;
2460
2461 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2462 /* don't change port status in our bookkeeping */
2463 goto skip_fsfstatus;
2464 }
2465
2466 /* evaluate FSF status in QTCB */
2467 switch (header->fsf_status) {
2468
2469 case FSF_PORT_ALREADY_OPEN:
2470 ZFCP_LOG_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n");
2471 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2472 "is already open.\n",
2473 port->wwpn, zfcp_get_busid_by_port(port));
2474 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2475 "fsf_s_popen");
2476 /*
2477 * This is a bug, however operation should continue normally
2478 * if it is simply ignored
2479 */
2480 break;
2481
2482 case FSF_ACCESS_DENIED:
2483 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2484 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2485 "on adapter %s\n",
2486 port->wwpn, zfcp_get_busid_by_port(port));
2487 for (counter = 0; counter < 2; counter++) {
2488 subtable = header->fsf_status_qual.halfword[counter * 2];
2489 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2490 switch (subtable) {
2491 case FSF_SQ_CFDC_SUBTABLE_OS:
2492 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2493 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2494 case FSF_SQ_CFDC_SUBTABLE_LUN:
2495 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2496 zfcp_act_subtable_type[subtable], rule);
2497 break;
2498 }
2499 }
2500 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2501 zfcp_erp_port_access_denied(port);
2502 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2503 break;
2504
2505 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2506 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n");
2507 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2508 "The remote port 0x%016Lx on adapter %s "
2509 "could not be opened. Disabling it.\n",
2510 port->wwpn, zfcp_get_busid_by_port(port));
2511 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2512 "fsf_s_max_ports");
2513 zfcp_erp_port_failed(port);
2514 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2515 break;
2516
2517 case FSF_ADAPTER_STATUS_AVAILABLE:
2518 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2519 switch (header->fsf_status_qual.word[0]) {
2520 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2521 ZFCP_LOG_FLAGS(2,
2522 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2523 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2524 "fsf_sq_ltest");
2525 /* ERP strategy will escalate */
2526 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2527 break;
2528 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2529 /* ERP strategy will escalate */
2530 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2531 "fsf_sq_ulp");
2532 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2533 break;
2534 case FSF_SQ_NO_RETRY_POSSIBLE:
2535 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n");
2536 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2537 "adapter %s could not be opened. "
2538 "Disabling it.\n",
2539 port->wwpn,
2540 zfcp_get_busid_by_port(port));
2541 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2542 "fsf_sq_no_retry");
2543 zfcp_erp_port_failed(port);
2544 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2545 break;
2546 default:
2547 ZFCP_LOG_NORMAL
2548 ("bug: Wrong status qualifier 0x%x arrived.\n",
2549 header->fsf_status_qual.word[0]);
2550 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2551 "fsf_sq_inval:");
2552 debug_exception(
2553 fsf_req->adapter->erp_dbf, 0,
2554 &header->fsf_status_qual.word[0],
2555 sizeof (u32));
2556 break;
2557 }
2558 break;
2559
2560 case FSF_GOOD:
2561 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2562 /* save port handle assigned by FSF */
2563 port->handle = header->port_handle;
2564 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2565 "was opened, it's port handle is 0x%x\n",
2566 port->wwpn, zfcp_get_busid_by_port(port),
2567 port->handle);
2568 /* mark port as open */
2569 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2570 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2571 retval = 0;
2572 /* check whether D_ID has changed during open */
2573 /*
2574 * FIXME: This check is not airtight, as the FCP channel does
2575 * not monitor closures of target port connections caused on
2576 * the remote side. Thus, they might miss out on invalidating
2577 * locally cached WWPNs (and other N_Port parameters) of gone
2578 * target ports. So, our heroic attempt to make things safe
2579 * could be undermined by 'open port' response data tagged with
2580 * obsolete WWPNs. Another reason to monitor potential
2581 * connection closures ourself at least (by interpreting
2582 * incoming ELS' and unsolicited status). It just crosses my
2583 * mind that one should be able to cross-check by means of
2584 * another GID_PN straight after a port has been opened.
2585 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2586 */
2587 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2588 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2589 {
2590 if (fsf_req->qtcb->bottom.support.els1_length <
2591 ((((unsigned long) &plogi->serv_param.wwpn) -
2592 ((unsigned long) plogi)) + sizeof (u64))) {
2593 ZFCP_LOG_INFO(
2594 "warning: insufficient length of "
2595 "PLOGI payload (%i)\n",
2596 fsf_req->qtcb->bottom.support.els1_length);
2597 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2598 "fsf_s_short_plogi:");
2599 /* skip sanity check and assume wwpn is ok */
2600 } else {
2601 if (plogi->serv_param.wwpn != port->wwpn) {
2602 ZFCP_LOG_INFO("warning: d_id of port "
2603 "0x%016Lx changed during "
2604 "open\n", port->wwpn);
2605 debug_text_event(
2606 fsf_req->adapter->erp_dbf, 0,
2607 "fsf_s_did_change:");
2608 atomic_clear_mask(
2609 ZFCP_STATUS_PORT_DID_DID,
2610 &port->status);
2611 } else
2612 port->wwnn = plogi->serv_param.wwnn;
2613 }
2614 }
2615 break;
2616
2617 case FSF_UNKNOWN_OP_SUBTYPE:
2618 /* should never occure, subtype not set in zfcp_fsf_open_port */
2619 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
2620 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2621 "op_subtype=0x%x)\n",
2622 zfcp_get_busid_by_port(port),
2623 fsf_req->qtcb->bottom.support.operation_subtype);
2624 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2625 break;
2626
2627 default:
2628 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2629 "(debug info 0x%x)\n",
2630 header->fsf_status);
2631 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2632 debug_exception(fsf_req->adapter->erp_dbf, 0,
2633 &header->fsf_status, sizeof (u32));
2634 break;
2635 }
2636
2637 skip_fsfstatus:
2638 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2639 return retval;
2640}
2641
2642/*
2643 * function: zfcp_fsf_close_port
2644 *
2645 * purpose: submit FSF command "close port"
2646 *
2647 * returns: address of initiated FSF request
2648 * NULL - request could not be initiated
2649 */
2650int
2651zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2652{
2653 volatile struct qdio_buffer_element *sbale;
2654 unsigned long lock_flags;
2655 int retval = 0;
2656
2657 /* setup new FSF request */
2658 retval = zfcp_fsf_req_create(erp_action->adapter,
2659 FSF_QTCB_CLOSE_PORT,
2660 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2661 erp_action->adapter->pool.fsf_req_erp,
2662 &lock_flags, &(erp_action->fsf_req));
2663 if (retval < 0) {
2664 ZFCP_LOG_INFO("error: Could not create a close port request "
2665 "for port 0x%016Lx on adapter %s.\n",
2666 erp_action->port->wwpn,
2667 zfcp_get_busid_by_adapter(erp_action->adapter));
2668 goto out;
2669 }
2670
2671 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2672 erp_action->fsf_req->sbal_curr, 0);
2673 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2674 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2675
2676 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2677 erp_action->fsf_req->data.close_port.port = erp_action->port;
2678 erp_action->fsf_req->erp_action = erp_action;
2679 erp_action->fsf_req->qtcb->header.port_handle =
2680 erp_action->port->handle;
2681
2682 /* start QDIO request for this FSF request */
2683 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2684 if (retval) {
2685 ZFCP_LOG_INFO("error: Could not send a close port request for "
2686 "port 0x%016Lx on adapter %s.\n",
2687 erp_action->port->wwpn,
2688 zfcp_get_busid_by_adapter(erp_action->adapter));
2689 zfcp_fsf_req_free(erp_action->fsf_req);
2690 erp_action->fsf_req = NULL;
2691 goto out;
2692 }
2693
2694 ZFCP_LOG_TRACE("close port request initiated "
2695 "(adapter %s, port 0x%016Lx)\n",
2696 zfcp_get_busid_by_adapter(erp_action->adapter),
2697 erp_action->port->wwpn);
2698 out:
2699 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2700 lock_flags);
2701 return retval;
2702}
2703
2704/*
2705 * function: zfcp_fsf_close_port_handler
2706 *
2707 * purpose: is called for finished Close Port FSF command
2708 *
2709 * returns:
2710 */
2711static int
2712zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2713{
2714 int retval = -EINVAL;
2715 struct zfcp_port *port;
2716
2717 port = fsf_req->data.close_port.port;
2718
2719 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2720 /* don't change port status in our bookkeeping */
2721 goto skip_fsfstatus;
2722 }
2723
2724 /* evaluate FSF status in QTCB */
2725 switch (fsf_req->qtcb->header.fsf_status) {
2726
2727 case FSF_PORT_HANDLE_NOT_VALID:
2728 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2729 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2730 "0x%016Lx on adapter %s invalid. This may happen "
2731 "occasionally.\n", port->handle,
2732 port->wwpn, zfcp_get_busid_by_port(port));
2733 ZFCP_LOG_DEBUG("status qualifier:\n");
2734 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2735 (char *) &fsf_req->qtcb->header.fsf_status_qual,
2736 sizeof (union fsf_status_qual));
2737 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2738 "fsf_s_phand_nv");
2739 zfcp_erp_adapter_reopen(port->adapter, 0);
2740 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2741 break;
2742
2743 case FSF_ADAPTER_STATUS_AVAILABLE:
2744 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2745 /* Note: FSF has actually closed the port in this case.
2746 * The status code is just daft. Fingers crossed for a change
2747 */
2748 retval = 0;
2749 break;
2750
2751 case FSF_GOOD:
2752 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2753 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2754 "port handle 0x%x\n", port->wwpn,
2755 zfcp_get_busid_by_port(port), port->handle);
2756 zfcp_erp_modify_port_status(port,
2757 ZFCP_STATUS_COMMON_OPEN,
2758 ZFCP_CLEAR);
2759 retval = 0;
2760 break;
2761
2762 default:
2763 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2764 "(debug info 0x%x)\n",
2765 fsf_req->qtcb->header.fsf_status);
2766 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2767 debug_exception(fsf_req->adapter->erp_dbf, 0,
2768 &fsf_req->qtcb->header.fsf_status,
2769 sizeof (u32));
2770 break;
2771 }
2772
2773 skip_fsfstatus:
2774 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2775 return retval;
2776}
2777
2778/*
2779 * function: zfcp_fsf_close_physical_port
2780 *
2781 * purpose: submit FSF command "close physical port"
2782 *
2783 * returns: address of initiated FSF request
2784 * NULL - request could not be initiated
2785 */
2786int
2787zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2788{
2789 int retval = 0;
2790 unsigned long lock_flags;
2791 volatile struct qdio_buffer_element *sbale;
2792
2793 /* setup new FSF request */
2794 retval = zfcp_fsf_req_create(erp_action->adapter,
2795 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2796 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2797 erp_action->adapter->pool.fsf_req_erp,
2798 &lock_flags, &erp_action->fsf_req);
2799 if (retval < 0) {
2800 ZFCP_LOG_INFO("error: Could not create close physical port "
2801 "request (adapter %s, port 0x%016Lx)\n",
2802 zfcp_get_busid_by_adapter(erp_action->adapter),
2803 erp_action->port->wwpn);
2804
2805 goto out;
2806 }
2807
2808 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2809 erp_action->fsf_req->sbal_curr, 0);
2810 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2811 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2812
2813 /* mark port as being closed */
2814 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2815 &erp_action->port->status);
2816 /* save a pointer to this port */
2817 erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
2818 /* port to be closeed */
2819 erp_action->fsf_req->qtcb->header.port_handle =
2820 erp_action->port->handle;
2821 erp_action->fsf_req->erp_action = erp_action;
2822
2823 /* start QDIO request for this FSF request */
2824 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2825 if (retval) {
2826 ZFCP_LOG_INFO("error: Could not send close physical port "
2827 "request (adapter %s, port 0x%016Lx)\n",
2828 zfcp_get_busid_by_adapter(erp_action->adapter),
2829 erp_action->port->wwpn);
2830 zfcp_fsf_req_free(erp_action->fsf_req);
2831 erp_action->fsf_req = NULL;
2832 goto out;
2833 }
2834
2835 ZFCP_LOG_TRACE("close physical port request initiated "
2836 "(adapter %s, port 0x%016Lx)\n",
2837 zfcp_get_busid_by_adapter(erp_action->adapter),
2838 erp_action->port->wwpn);
2839 out:
2840 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2841 lock_flags);
2842 return retval;
2843}
2844
2845/*
2846 * function: zfcp_fsf_close_physical_port_handler
2847 *
2848 * purpose: is called for finished Close Physical Port FSF command
2849 *
2850 * returns:
2851 */
2852static int
2853zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2854{
2855 int retval = -EINVAL;
2856 struct zfcp_port *port;
2857 struct zfcp_unit *unit;
2858 struct fsf_qtcb_header *header;
2859 u16 subtable, rule, counter;
2860
2861 port = fsf_req->data.close_physical_port.port;
2862 header = &fsf_req->qtcb->header;
2863
2864 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2865 /* don't change port status in our bookkeeping */
2866 goto skip_fsfstatus;
2867 }
2868
2869 /* evaluate FSF status in QTCB */
2870 switch (header->fsf_status) {
2871
2872 case FSF_PORT_HANDLE_NOT_VALID:
2873 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2874 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2875 "(adapter %s, port 0x%016Lx). "
2876 "This may happen occasionally.\n",
2877 port->handle,
2878 zfcp_get_busid_by_port(port),
2879 port->wwpn);
2880 ZFCP_LOG_DEBUG("status qualifier:\n");
2881 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2882 (char *) &header->fsf_status_qual,
2883 sizeof (union fsf_status_qual));
2884 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2885 "fsf_s_phand_nv");
2886 zfcp_erp_adapter_reopen(port->adapter, 0);
2887 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2888 break;
2889
2890 case FSF_ACCESS_DENIED:
2891 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2892 ZFCP_LOG_NORMAL("Access denied, cannot close "
2893 "physical port 0x%016Lx on adapter %s\n",
2894 port->wwpn, zfcp_get_busid_by_port(port));
2895 for (counter = 0; counter < 2; counter++) {
2896 subtable = header->fsf_status_qual.halfword[counter * 2];
2897 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2898 switch (subtable) {
2899 case FSF_SQ_CFDC_SUBTABLE_OS:
2900 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2901 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2902 case FSF_SQ_CFDC_SUBTABLE_LUN:
2903 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2904 zfcp_act_subtable_type[subtable], rule);
2905 break;
2906 }
2907 }
2908 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2909 zfcp_erp_port_access_denied(port);
2910 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2911 break;
2912
2913 case FSF_PORT_BOXED:
2914 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
2915 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2916 "%s needs to be reopened but it was attempted "
2917 "to close it physically.\n",
2918 port->wwpn,
2919 zfcp_get_busid_by_port(port));
2920 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2921 zfcp_erp_port_reopen(port, 0);
2922 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2923 ZFCP_STATUS_FSFREQ_RETRY;
2924 break;
2925
2926 case FSF_ADAPTER_STATUS_AVAILABLE:
2927 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2928 switch (header->fsf_status_qual.word[0]) {
2929 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2930 ZFCP_LOG_FLAGS(2,
2931 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2932 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2933 "fsf_sq_ltest");
2934 /* This will now be escalated by ERP */
2935 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2936 break;
2937 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2938 ZFCP_LOG_FLAGS(2,
2939 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
2940 /* ERP strategy will escalate */
2941 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2942 "fsf_sq_ulp");
2943 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2944 break;
2945 default:
2946 ZFCP_LOG_NORMAL
2947 ("bug: Wrong status qualifier 0x%x arrived.\n",
2948 header->fsf_status_qual.word[0]);
2949 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2950 "fsf_sq_inval:");
2951 debug_exception(
2952 fsf_req->adapter->erp_dbf, 0,
2953 &header->fsf_status_qual.word[0], sizeof (u32));
2954 break;
2955 }
2956 break;
2957
2958 case FSF_GOOD:
2959 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2960 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2961 "physically closed, port handle 0x%x\n",
2962 port->wwpn,
2963 zfcp_get_busid_by_port(port), port->handle);
2964 /* can't use generic zfcp_erp_modify_port_status because
2965 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2966 */
2967 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2968 list_for_each_entry(unit, &port->unit_list_head, list)
2969 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2970 retval = 0;
2971 break;
2972
2973 default:
2974 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2975 "(debug info 0x%x)\n",
2976 header->fsf_status);
2977 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2978 debug_exception(fsf_req->adapter->erp_dbf, 0,
2979 &header->fsf_status, sizeof (u32));
2980 break;
2981 }
2982
2983 skip_fsfstatus:
2984 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2985 return retval;
2986}
2987
2988/*
2989 * function: zfcp_fsf_open_unit
2990 *
2991 * purpose:
2992 *
2993 * returns:
2994 *
2995 * assumptions: This routine does not check whether the associated
2996 * remote port has already been opened. This should be
2997 * done by calling routines. Otherwise some status
2998 * may be presented by FSF
2999 */
3000int
3001zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
3002{
3003 volatile struct qdio_buffer_element *sbale;
3004 unsigned long lock_flags;
3005 int retval = 0;
3006
3007 /* setup new FSF request */
3008 retval = zfcp_fsf_req_create(erp_action->adapter,
3009 FSF_QTCB_OPEN_LUN,
3010 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3011 erp_action->adapter->pool.fsf_req_erp,
3012 &lock_flags, &(erp_action->fsf_req));
3013 if (retval < 0) {
3014 ZFCP_LOG_INFO("error: Could not create open unit request for "
3015 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3016 erp_action->unit->fcp_lun,
3017 erp_action->unit->port->wwpn,
3018 zfcp_get_busid_by_adapter(erp_action->adapter));
3019 goto out;
3020 }
3021
3022 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3023 erp_action->fsf_req->sbal_curr, 0);
3024 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3025 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3026
3027 erp_action->fsf_req->qtcb->header.port_handle =
3028 erp_action->port->handle;
3029 erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
3030 erp_action->unit->fcp_lun;
3031 erp_action->fsf_req->qtcb->bottom.support.option =
3032 FSF_OPEN_LUN_SUPPRESS_BOXING;
3033 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
3034 erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
3035 erp_action->fsf_req->erp_action = erp_action;
3036
3037 /* start QDIO request for this FSF request */
3038 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3039 if (retval) {
3040 ZFCP_LOG_INFO("error: Could not send an open unit request "
3041 "on the adapter %s, port 0x%016Lx for "
3042 "unit 0x%016Lx\n",
3043 zfcp_get_busid_by_adapter(erp_action->adapter),
3044 erp_action->port->wwpn,
3045 erp_action->unit->fcp_lun);
3046 zfcp_fsf_req_free(erp_action->fsf_req);
3047 erp_action->fsf_req = NULL;
3048 goto out;
3049 }
3050
3051 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3052 "port 0x%016Lx, unit 0x%016Lx)\n",
3053 zfcp_get_busid_by_adapter(erp_action->adapter),
3054 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3055 out:
3056 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3057 lock_flags);
3058 return retval;
3059}
3060
3061/*
3062 * function: zfcp_fsf_open_unit_handler
3063 *
3064 * purpose: is called for finished Open LUN command
3065 *
3066 * returns:
3067 */
3068static int
3069zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3070{
3071 int retval = -EINVAL;
3072 struct zfcp_adapter *adapter;
3073 struct zfcp_unit *unit;
3074 struct fsf_qtcb_header *header;
3075 struct fsf_qtcb_bottom_support *bottom;
3076 struct fsf_queue_designator *queue_designator;
3077 u16 subtable, rule, counter;
3078 u32 allowed, exclusive, readwrite;
3079
3080 unit = fsf_req->data.open_unit.unit;
3081
3082 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3083 /* don't change unit status in our bookkeeping */
3084 goto skip_fsfstatus;
3085 }
3086
3087 adapter = fsf_req->adapter;
3088 header = &fsf_req->qtcb->header;
3089 bottom = &fsf_req->qtcb->bottom.support;
3090 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3091
3092 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
3093 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
3094 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
3095
3096 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3097 ZFCP_STATUS_UNIT_SHARED |
3098 ZFCP_STATUS_UNIT_READONLY,
3099 &unit->status);
3100
3101 /* evaluate FSF status in QTCB */
3102 switch (header->fsf_status) {
3103
3104 case FSF_PORT_HANDLE_NOT_VALID:
3105 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3106 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3107 "for port 0x%016Lx on adapter %s invalid "
3108 "This may happen occasionally\n",
3109 unit->port->handle,
3110 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3111 ZFCP_LOG_DEBUG("status qualifier:\n");
3112 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3113 (char *) &header->fsf_status_qual,
3114 sizeof (union fsf_status_qual));
3115 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3116 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3117 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3118 break;
3119
3120 case FSF_LUN_ALREADY_OPEN:
3121 ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n");
3122 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3123 "remote port 0x%016Lx on adapter %s twice.\n",
3124 unit->fcp_lun,
3125 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3126 debug_text_exception(adapter->erp_dbf, 0,
3127 "fsf_s_uopen");
3128 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3129 break;
3130
3131 case FSF_ACCESS_DENIED:
3132 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3133 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3134 "remote port 0x%016Lx on adapter %s\n",
3135 unit->fcp_lun, unit->port->wwpn,
3136 zfcp_get_busid_by_unit(unit));
3137 for (counter = 0; counter < 2; counter++) {
3138 subtable = header->fsf_status_qual.halfword[counter * 2];
3139 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3140 switch (subtable) {
3141 case FSF_SQ_CFDC_SUBTABLE_OS:
3142 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3143 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3144 case FSF_SQ_CFDC_SUBTABLE_LUN:
3145 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3146 zfcp_act_subtable_type[subtable], rule);
3147 break;
3148 }
3149 }
3150 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3151 zfcp_erp_unit_access_denied(unit);
3152 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3153 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3154 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3155 break;
3156
3157 case FSF_PORT_BOXED:
3158 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3159 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3160 "needs to be reopened\n",
3161 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3162 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3163 zfcp_erp_port_reopen(unit->port, 0);
3164 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3165 ZFCP_STATUS_FSFREQ_RETRY;
3166 break;
3167
3168 case FSF_LUN_SHARING_VIOLATION:
3169 ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n");
3170 if (header->fsf_status_qual.word[0] != 0) {
3171 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3172 "with WWPN 0x%Lx "
3173 "connected to the adapter %s "
3174 "is already in use in LPAR%d, CSS%d\n",
3175 unit->fcp_lun,
3176 unit->port->wwpn,
3177 zfcp_get_busid_by_unit(unit),
3178 queue_designator->hla,
3179 queue_designator->cssid);
3180 } else {
3181 subtable = header->fsf_status_qual.halfword[4];
3182 rule = header->fsf_status_qual.halfword[5];
3183 switch (subtable) {
3184 case FSF_SQ_CFDC_SUBTABLE_OS:
3185 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3186 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3187 case FSF_SQ_CFDC_SUBTABLE_LUN:
3188 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3189 "remote port with WWPN 0x%Lx "
3190 "connected to the adapter %s "
3191 "is denied (%s rule %d)\n",
3192 unit->fcp_lun,
3193 unit->port->wwpn,
3194 zfcp_get_busid_by_unit(unit),
3195 zfcp_act_subtable_type[subtable],
3196 rule);
3197 break;
3198 }
3199 }
3200 ZFCP_LOG_DEBUG("status qualifier:\n");
3201 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3202 (char *) &header->fsf_status_qual,
3203 sizeof (union fsf_status_qual));
3204 debug_text_event(adapter->erp_dbf, 2,
3205 "fsf_s_l_sh_vio");
3206 zfcp_erp_unit_access_denied(unit);
3207 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3208 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3209 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3210 break;
3211
3212 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3213 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n");
3214 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3215 "There is no handle (temporary port identifier) "
3216 "available for unit 0x%016Lx on port 0x%016Lx "
3217 "on adapter %s\n",
3218 unit->fcp_lun,
3219 unit->port->wwpn,
3220 zfcp_get_busid_by_unit(unit));
3221 debug_text_event(adapter->erp_dbf, 1,
3222 "fsf_s_max_units");
3223 zfcp_erp_unit_failed(unit);
3224 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3225 break;
3226
3227 case FSF_ADAPTER_STATUS_AVAILABLE:
3228 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3229 switch (header->fsf_status_qual.word[0]) {
3230 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3231 ZFCP_LOG_FLAGS(2,
3232 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3233 /* Re-establish link to port */
3234 debug_text_event(adapter->erp_dbf, 1,
3235 "fsf_sq_ltest");
3236 zfcp_erp_port_reopen(unit->port, 0);
3237 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3238 break;
3239 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3240 ZFCP_LOG_FLAGS(2,
3241 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3242 /* ERP strategy will escalate */
3243 debug_text_event(adapter->erp_dbf, 1,
3244 "fsf_sq_ulp");
3245 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3246 break;
3247 default:
3248 ZFCP_LOG_NORMAL
3249 ("bug: Wrong status qualifier 0x%x arrived.\n",
3250 header->fsf_status_qual.word[0]);
3251 debug_text_event(adapter->erp_dbf, 0,
3252 "fsf_sq_inval:");
3253 debug_exception(adapter->erp_dbf, 0,
3254 &header->fsf_status_qual.word[0],
3255 sizeof (u32));
3256 }
3257 break;
3258
3259 case FSF_INVALID_COMMAND_OPTION:
3260 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
3261 ZFCP_LOG_NORMAL(
3262 "Invalid option 0x%x has been specified "
3263 "in QTCB bottom sent to the adapter %s\n",
3264 bottom->option,
3265 zfcp_get_busid_by_adapter(adapter));
3266 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3267 retval = -EINVAL;
3268 break;
3269
3270 case FSF_GOOD:
3271 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3272 /* save LUN handle assigned by FSF */
3273 unit->handle = header->lun_handle;
3274 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3275 "adapter %s opened, port handle 0x%x\n",
3276 unit->fcp_lun,
3277 unit->port->wwpn,
3278 zfcp_get_busid_by_unit(unit),
3279 unit->handle);
3280 /* mark unit as open */
3281 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3282
3283 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3284 if (!exclusive)
3285 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3286 &unit->status);
3287
3288 if (!readwrite) {
3289 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3290 &unit->status);
3291 ZFCP_LOG_NORMAL("read-only access for unit "
3292 "(adapter %s, wwpn=0x%016Lx, "
3293 "fcp_lun=0x%016Lx)\n",
3294 zfcp_get_busid_by_unit(unit),
3295 unit->port->wwpn,
3296 unit->fcp_lun);
3297 }
3298
3299 if (exclusive && !readwrite) {
3300 ZFCP_LOG_NORMAL("exclusive access of read-only "
3301 "unit not supported\n");
3302 zfcp_erp_unit_failed(unit);
3303 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3304 zfcp_erp_unit_shutdown(unit, 0);
3305 } else if (!exclusive && readwrite) {
3306 ZFCP_LOG_NORMAL("shared access of read-write "
3307 "unit not supported\n");
3308 zfcp_erp_unit_failed(unit);
3309 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3310 zfcp_erp_unit_shutdown(unit, 0);
3311 }
3312 }
3313
3314 retval = 0;
3315 break;
3316
3317 default:
3318 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3319 "(debug info 0x%x)\n",
3320 header->fsf_status);
3321 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3322 debug_exception(adapter->erp_dbf, 0,
3323 &header->fsf_status, sizeof (u32));
3324 break;
3325 }
3326
3327 skip_fsfstatus:
3328 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3329 return retval;
3330}
3331
3332/*
3333 * function: zfcp_fsf_close_unit
3334 *
3335 * purpose:
3336 *
3337 * returns: address of fsf_req - request successfully initiated
3338 * NULL -
3339 *
3340 * assumptions: This routine does not check whether the associated
3341 * remote port/lun has already been opened. This should be
3342 * done by calling routines. Otherwise some status
3343 * may be presented by FSF
3344 */
3345int
3346zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3347{
3348 volatile struct qdio_buffer_element *sbale;
3349 unsigned long lock_flags;
3350 int retval = 0;
3351
3352 /* setup new FSF request */
3353 retval = zfcp_fsf_req_create(erp_action->adapter,
3354 FSF_QTCB_CLOSE_LUN,
3355 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3356 erp_action->adapter->pool.fsf_req_erp,
3357 &lock_flags, &(erp_action->fsf_req));
3358 if (retval < 0) {
3359 ZFCP_LOG_INFO("error: Could not create close unit request for "
3360 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3361 erp_action->unit->fcp_lun,
3362 erp_action->port->wwpn,
3363 zfcp_get_busid_by_adapter(erp_action->adapter));
3364 goto out;
3365 }
3366
3367 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3368 erp_action->fsf_req->sbal_curr, 0);
3369 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3370 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3371
3372 erp_action->fsf_req->qtcb->header.port_handle =
3373 erp_action->port->handle;
3374 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3375 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3376 erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
3377 erp_action->fsf_req->erp_action = erp_action;
3378
3379 /* start QDIO request for this FSF request */
3380 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3381 if (retval) {
3382 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3383 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3384 erp_action->unit->fcp_lun,
3385 erp_action->port->wwpn,
3386 zfcp_get_busid_by_adapter(erp_action->adapter));
3387 zfcp_fsf_req_free(erp_action->fsf_req);
3388 erp_action->fsf_req = NULL;
3389 goto out;
3390 }
3391
3392 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3393 "port 0x%016Lx, unit 0x%016Lx)\n",
3394 zfcp_get_busid_by_adapter(erp_action->adapter),
3395 erp_action->port->wwpn, erp_action->unit->fcp_lun);
3396 out:
3397 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3398 lock_flags);
3399 return retval;
3400}
3401
3402/*
3403 * function: zfcp_fsf_close_unit_handler
3404 *
3405 * purpose: is called for finished Close LUN FSF command
3406 *
3407 * returns:
3408 */
3409static int
3410zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3411{
3412 int retval = -EINVAL;
3413 struct zfcp_unit *unit;
3414
3415 unit = fsf_req->data.close_unit.unit; /* restore unit */
3416
3417 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3418 /* don't change unit status in our bookkeeping */
3419 goto skip_fsfstatus;
3420 }
3421
3422 /* evaluate FSF status in QTCB */
3423 switch (fsf_req->qtcb->header.fsf_status) {
3424
3425 case FSF_PORT_HANDLE_NOT_VALID:
3426 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3427 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3428 "0x%016Lx on adapter %s invalid. This may "
3429 "happen in rare circumstances\n",
3430 unit->port->handle,
3431 unit->port->wwpn,
3432 zfcp_get_busid_by_unit(unit));
3433 ZFCP_LOG_DEBUG("status qualifier:\n");
3434 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3435 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3436 sizeof (union fsf_status_qual));
3437 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3438 "fsf_s_phand_nv");
3439 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3440 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3441 &fsf_req->qtcb->header.fsf_status_qual,
3442 sizeof (union fsf_status_qual));
3443 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3444 break;
3445
3446 case FSF_LUN_HANDLE_NOT_VALID:
3447 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3448 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3449 "0x%016Lx on port 0x%016Lx on adapter %s is "
3450 "invalid. This may happen occasionally.\n",
3451 unit->handle,
3452 unit->fcp_lun,
3453 unit->port->wwpn,
3454 zfcp_get_busid_by_unit(unit));
3455 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3456 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3457 (char *) &fsf_req->qtcb->header.fsf_status_qual,
3458 sizeof (union fsf_status_qual));
3459 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3460 "fsf_s_lhand_nv");
3461 zfcp_erp_port_reopen(unit->port, 0);
3462 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3463 &fsf_req->qtcb->header.fsf_status_qual,
3464 sizeof (union fsf_status_qual));
3465 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3466 break;
3467
3468 case FSF_PORT_BOXED:
3469 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3470 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3471 "needs to be reopened\n",
3472 unit->port->wwpn,
3473 zfcp_get_busid_by_unit(unit));
3474 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3475 zfcp_erp_port_reopen(unit->port, 0);
3476 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3477 ZFCP_STATUS_FSFREQ_RETRY;
3478 break;
3479
3480 case FSF_ADAPTER_STATUS_AVAILABLE:
3481 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3482 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3483 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3484 ZFCP_LOG_FLAGS(2,
3485 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3486 /* re-establish link to port */
3487 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3488 "fsf_sq_ltest");
3489 zfcp_erp_port_reopen(unit->port, 0);
3490 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3491 break;
3492 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3493 ZFCP_LOG_FLAGS(2,
3494 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3495 /* ERP strategy will escalate */
3496 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3497 "fsf_sq_ulp");
3498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3499 break;
3500 default:
3501 ZFCP_LOG_NORMAL
3502 ("bug: Wrong status qualifier 0x%x arrived.\n",
3503 fsf_req->qtcb->header.fsf_status_qual.word[0]);
3504 debug_text_event(fsf_req->adapter->erp_dbf, 0,
3505 "fsf_sq_inval:");
3506 debug_exception(
3507 fsf_req->adapter->erp_dbf, 0,
3508 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3509 sizeof (u32));
3510 break;
3511 }
3512 break;
3513
3514 case FSF_GOOD:
3515 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3516 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3517 "closed, port handle 0x%x\n",
3518 unit->fcp_lun,
3519 unit->port->wwpn,
3520 zfcp_get_busid_by_unit(unit),
3521 unit->handle);
3522 /* mark unit as closed */
3523 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3524 retval = 0;
3525 break;
3526
3527 default:
3528 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3529 "(debug info 0x%x)\n",
3530 fsf_req->qtcb->header.fsf_status);
3531 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3532 debug_exception(fsf_req->adapter->erp_dbf, 0,
3533 &fsf_req->qtcb->header.fsf_status,
3534 sizeof (u32));
3535 break;
3536 }
3537
3538 skip_fsfstatus:
3539 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3540 return retval;
3541}
3542
3543/**
3544 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3545 * @adapter: adapter where scsi command is issued
3546 * @unit: unit where command is sent to
3547 * @scsi_cmnd: scsi command to be sent
3548 * @timer: timer to be started when request is initiated
3549 * @req_flags: flags for fsf_request
3550 */
3551int
3552zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3553 struct zfcp_unit *unit,
3554 struct scsi_cmnd * scsi_cmnd,
3555 struct timer_list *timer, int req_flags)
3556{
3557 struct zfcp_fsf_req *fsf_req = NULL;
3558 struct fcp_cmnd_iu *fcp_cmnd_iu;
3559 unsigned int sbtype;
3560 unsigned long lock_flags;
3561 int real_bytes = 0;
3562 int retval = 0;
3563 int mask;
3564
3565 /* setup new FSF request */
3566 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3567 adapter->pool.fsf_req_scsi,
3568 &lock_flags, &fsf_req);
3569 if (unlikely(retval < 0)) {
3570 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3571 "for unit 0x%016Lx on port 0x%016Lx on "
3572 "adapter %s\n",
3573 unit->fcp_lun,
3574 unit->port->wwpn,
3575 zfcp_get_busid_by_adapter(adapter));
3576 goto failed_req_create;
3577 }
3578
3579 /*
3580 * associate FSF request with SCSI request
3581 * (need this for look up on abort)
3582 */
3583 fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
3584 scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
3585
3586 /*
3587 * associate SCSI command with FSF request
3588 * (need this for look up on normal command completion)
3589 */
3590 fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
3591 fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
3592 fsf_req->data.send_fcp_command_task.unit = unit;
3593 ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
3594
3595 /* set handles of unit and its parent port in QTCB */
3596 fsf_req->qtcb->header.lun_handle = unit->handle;
3597 fsf_req->qtcb->header.port_handle = unit->port->handle;
3598
3599 /* FSF does not define the structure of the FCP_CMND IU */
3600 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3601 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3602
3603 /*
3604 * set depending on data direction:
3605 * data direction bits in SBALE (SB Type)
3606 * data direction bits in QTCB
3607 * data direction bits in FCP_CMND IU
3608 */
3609 switch (scsi_cmnd->sc_data_direction) {
3610 case DMA_NONE:
3611 ZFCP_LOG_FLAGS(3, "DMA_NONE\n");
3612 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3613 /*
3614 * FIXME(qdio):
3615 * what is the correct type for commands
3616 * without 'real' data buffers?
3617 */
3618 sbtype = SBAL_FLAGS0_TYPE_READ;
3619 break;
3620 case DMA_FROM_DEVICE:
3621 ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n");
3622 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3623 sbtype = SBAL_FLAGS0_TYPE_READ;
3624 fcp_cmnd_iu->rddata = 1;
3625 break;
3626 case DMA_TO_DEVICE:
3627 ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n");
3628 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3629 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3630 fcp_cmnd_iu->wddata = 1;
3631 break;
3632 case DMA_BIDIRECTIONAL:
3633 ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n");
3634 default:
3635 /*
3636 * dummy, catch this condition earlier
3637 * in zfcp_scsi_queuecommand
3638 */
3639 goto failed_scsi_cmnd;
3640 }
3641
3642 /* set FC service class in QTCB (3 per default) */
3643 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3644
3645 /* set FCP_LUN in FCP_CMND IU in QTCB */
3646 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3647
3648 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3649
3650 /* set task attributes in FCP_CMND IU in QTCB */
3651 if (likely((scsi_cmnd->device->simple_tags) ||
3652 (atomic_test_mask(mask, &unit->status))))
3653 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3654 else
3655 fcp_cmnd_iu->task_attribute = UNTAGGED;
3656
3657 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3658 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3659 fcp_cmnd_iu->add_fcp_cdb_length
3660 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3661 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3662 "additional FCP_CDB length is 0x%x "
3663 "(shifted right 2 bits)\n",
3664 scsi_cmnd->cmd_len,
3665 fcp_cmnd_iu->add_fcp_cdb_length);
3666 }
3667 /*
3668 * copy SCSI CDB (including additional length, if any) to
3669 * FCP_CDB in FCP_CMND IU in QTCB
3670 */
3671 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3672
3673 /* FCP CMND IU length in QTCB */
3674 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3675 sizeof (struct fcp_cmnd_iu) +
3676 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3677
3678 /* generate SBALEs from data buffer */
3679 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3680 if (unlikely(real_bytes < 0)) {
3681 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3682 ZFCP_LOG_DEBUG(
3683 "Data did not fit into available buffer(s), "
3684 "waiting for more...\n");
3685 retval = -EIO;
3686 } else {
3687 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3688 "required. Shutting down unit "
3689 "(adapter %s, port 0x%016Lx, "
3690 "unit 0x%016Lx)\n",
3691 zfcp_get_busid_by_unit(unit),
3692 unit->port->wwpn,
3693 unit->fcp_lun);
3694 zfcp_erp_unit_shutdown(unit, 0);
3695 retval = -EINVAL;
3696 }
3697 goto no_fit;
3698 }
3699
3700 /* set length of FCP data length in FCP_CMND IU in QTCB */
3701 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3702
3703 ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3704 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3705 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3706
3707 /*
3708 * start QDIO request for this FSF request
3709 * covered by an SBALE)
3710 */
3711 retval = zfcp_fsf_req_send(fsf_req, timer);
3712 if (unlikely(retval < 0)) {
3713 ZFCP_LOG_INFO("error: Could not send FCP command request "
3714 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3715 zfcp_get_busid_by_adapter(adapter),
3716 unit->port->wwpn,
3717 unit->fcp_lun);
3718 goto send_failed;
3719 }
3720
3721 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3722 "port 0x%016Lx, unit 0x%016Lx)\n",
3723 zfcp_get_busid_by_adapter(adapter),
3724 unit->port->wwpn,
3725 unit->fcp_lun);
3726 goto success;
3727
3728 send_failed:
3729 no_fit:
3730 failed_scsi_cmnd:
3731 zfcp_fsf_req_free(fsf_req);
3732 fsf_req = NULL;
3733 scsi_cmnd->host_scribble = NULL;
3734 success:
3735 failed_req_create:
3736 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3737 return retval;
3738}
3739
3740/*
3741 * function: zfcp_fsf_send_fcp_command_task_management
3742 *
3743 * purpose:
3744 *
3745 * returns:
3746 *
3747 * FIXME(design): should be watched by a timeout!!!
3748 * FIXME(design) shouldn't this be modified to return an int
3749 * also...don't know how though
3750 *
3751 */
3752struct zfcp_fsf_req *
3753zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3754 struct zfcp_unit *unit,
3755 u8 tm_flags, int req_flags)
3756{
3757 struct zfcp_fsf_req *fsf_req = NULL;
3758 int retval = 0;
3759 struct fcp_cmnd_iu *fcp_cmnd_iu;
3760 unsigned long lock_flags;
3761 volatile struct qdio_buffer_element *sbale;
3762
3763 /* setup new FSF request */
3764 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3765 adapter->pool.fsf_req_scsi,
3766 &lock_flags, &fsf_req);
3767 if (retval < 0) {
3768 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3769 "management) request for adapter %s, port "
3770 " 0x%016Lx, unit 0x%016Lx.\n",
3771 zfcp_get_busid_by_adapter(adapter),
3772 unit->port->wwpn, unit->fcp_lun);
3773 goto out;
3774 }
3775
3776 /*
3777 * Used to decide on proper handler in the return path,
3778 * could be either zfcp_fsf_send_fcp_command_task_handler or
3779 * zfcp_fsf_send_fcp_command_task_management_handler */
3780
3781 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3782
3783 /*
3784 * hold a pointer to the unit being target of this
3785 * task management request
3786 */
3787 fsf_req->data.send_fcp_command_task_management.unit = unit;
3788
3789 /* set FSF related fields in QTCB */
3790 fsf_req->qtcb->header.lun_handle = unit->handle;
3791 fsf_req->qtcb->header.port_handle = unit->port->handle;
3792 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3793 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3794 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3795 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3796
3797 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3798 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3799 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3800
3801 /* set FCP related fields in FCP_CMND IU in QTCB */
3802 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3803 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3804 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3805 fcp_cmnd_iu->task_management_flags = tm_flags;
3806
3807 /* start QDIO request for this FSF request */
3808 zfcp_fsf_start_scsi_er_timer(adapter);
3809 retval = zfcp_fsf_req_send(fsf_req, NULL);
3810 if (retval) {
3811 del_timer(&adapter->scsi_er_timer);
3812 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3813 "management) on adapter %s, port 0x%016Lx for "
3814 "unit LUN 0x%016Lx\n",
3815 zfcp_get_busid_by_adapter(adapter),
3816 unit->port->wwpn,
3817 unit->fcp_lun);
3818 zfcp_fsf_req_free(fsf_req);
3819 fsf_req = NULL;
3820 goto out;
3821 }
3822
3823 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3824 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3825 "tm_flags=0x%x)\n",
3826 zfcp_get_busid_by_adapter(adapter),
3827 unit->port->wwpn,
3828 unit->fcp_lun,
3829 tm_flags);
3830 out:
3831 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3832 return fsf_req;
3833}
3834
3835/*
3836 * function: zfcp_fsf_send_fcp_command_handler
3837 *
3838 * purpose: is called for finished Send FCP Command
3839 *
3840 * returns:
3841 */
3842static int
3843zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3844{
3845 int retval = -EINVAL;
3846 struct zfcp_unit *unit;
3847 struct fsf_qtcb_header *header;
3848 u16 subtable, rule, counter;
3849
3850 header = &fsf_req->qtcb->header;
3851
3852 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3853 unit = fsf_req->data.send_fcp_command_task_management.unit;
3854 else
3855 unit = fsf_req->data.send_fcp_command_task.unit;
3856
3857 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3858 /* go directly to calls of special handlers */
3859 goto skip_fsfstatus;
3860 }
3861
3862 /* evaluate FSF status in QTCB */
3863 switch (header->fsf_status) {
3864
3865 case FSF_PORT_HANDLE_NOT_VALID:
3866 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3867 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3868 "0x%016Lx on adapter %s invalid\n",
3869 unit->port->handle,
3870 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3871 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3872 (char *) &header->fsf_status_qual,
3873 sizeof (union fsf_status_qual));
3874 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3875 "fsf_s_phand_nv");
3876 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3877 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3878 break;
3879
3880 case FSF_LUN_HANDLE_NOT_VALID:
3881 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3882 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3883 "0x%016Lx on port 0x%016Lx on adapter %s is "
3884 "invalid. This may happen occasionally.\n",
3885 unit->handle,
3886 unit->fcp_lun,
3887 unit->port->wwpn,
3888 zfcp_get_busid_by_unit(unit));
3889 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3890 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3891 (char *) &header->fsf_status_qual,
3892 sizeof (union fsf_status_qual));
3893 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3894 "fsf_s_uhand_nv");
3895 zfcp_erp_port_reopen(unit->port, 0);
3896 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3897 break;
3898
3899 case FSF_HANDLE_MISMATCH:
3900 ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n");
3901 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3902 "unexpectedly. (adapter %s, port 0x%016Lx, "
3903 "unit 0x%016Lx)\n",
3904 unit->port->handle,
3905 zfcp_get_busid_by_unit(unit),
3906 unit->port->wwpn,
3907 unit->fcp_lun);
3908 ZFCP_LOG_NORMAL("status qualifier:\n");
3909 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3910 (char *) &header->fsf_status_qual,
3911 sizeof (union fsf_status_qual));
3912 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3913 "fsf_s_hand_mis");
3914 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3915 zfcp_cmd_dbf_event_fsf("handmism",
3916 fsf_req,
3917 &header->fsf_status_qual,
3918 sizeof (union fsf_status_qual));
3919 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3920 break;
3921
3922 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3923 ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
3924 if (fsf_req->adapter->fc_service_class <= 3) {
3925 ZFCP_LOG_NORMAL("error: The adapter %s does "
3926 "not support fibrechannel class %d.\n",
3927 zfcp_get_busid_by_unit(unit),
3928 fsf_req->adapter->fc_service_class);
3929 } else {
3930 ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3931 "adapter %s is invalid. "
3932 "(debug info %d)\n",
3933 zfcp_get_busid_by_unit(unit),
3934 fsf_req->adapter->fc_service_class);
3935 }
3936 /* stop operation for this adapter */
3937 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3938 "fsf_s_class_nsup");
3939 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3940 zfcp_cmd_dbf_event_fsf("unsclass",
3941 fsf_req,
3942 &header->fsf_status_qual,
3943 sizeof (union fsf_status_qual));
3944 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3945 break;
3946
3947 case FSF_FCPLUN_NOT_VALID:
3948 ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n");
3949 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3950 "adapter %s does not have correct unit "
3951 "handle 0x%x\n",
3952 unit->fcp_lun,
3953 unit->port->wwpn,
3954 zfcp_get_busid_by_unit(unit),
3955 unit->handle);
3956 ZFCP_LOG_DEBUG("status qualifier:\n");
3957 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3958 (char *) &header->fsf_status_qual,
3959 sizeof (union fsf_status_qual));
3960 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3961 "fsf_s_fcp_lun_nv");
3962 zfcp_erp_port_reopen(unit->port, 0);
3963 zfcp_cmd_dbf_event_fsf("fluninv",
3964 fsf_req,
3965 &header->fsf_status_qual,
3966 sizeof (union fsf_status_qual));
3967 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3968 break;
3969
3970 case FSF_ACCESS_DENIED:
3971 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3972 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3973 "unit 0x%016Lx on port 0x%016Lx on "
3974 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3975 zfcp_get_busid_by_unit(unit));
3976 for (counter = 0; counter < 2; counter++) {
3977 subtable = header->fsf_status_qual.halfword[counter * 2];
3978 rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3979 switch (subtable) {
3980 case FSF_SQ_CFDC_SUBTABLE_OS:
3981 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3982 case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3983 case FSF_SQ_CFDC_SUBTABLE_LUN:
3984 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3985 zfcp_act_subtable_type[subtable], rule);
3986 break;
3987 }
3988 }
3989 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3990 zfcp_erp_unit_access_denied(unit);
3991 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3992 break;
3993
3994 case FSF_DIRECTION_INDICATOR_NOT_VALID:
3995 ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n");
3996 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3997 "0x%016Lx on port 0x%016Lx on adapter %s "
3998 "(debug info %d)\n",
3999 unit->fcp_lun,
4000 unit->port->wwpn,
4001 zfcp_get_busid_by_unit(unit),
4002 fsf_req->qtcb->bottom.io.data_direction);
4003 /* stop operation for this adapter */
4004 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4005 "fsf_s_dir_ind_nv");
4006 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4007 zfcp_cmd_dbf_event_fsf("dirinv",
4008 fsf_req,
4009 &header->fsf_status_qual,
4010 sizeof (union fsf_status_qual));
4011 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4012 break;
4013
4014 case FSF_CMND_LENGTH_NOT_VALID:
4015 ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n");
4016 ZFCP_LOG_NORMAL
4017 ("bug: An invalid control-data-block length field "
4018 "was found in a command for unit 0x%016Lx on port "
4019 "0x%016Lx on adapter %s " "(debug info %d)\n",
4020 unit->fcp_lun, unit->port->wwpn,
4021 zfcp_get_busid_by_unit(unit),
4022 fsf_req->qtcb->bottom.io.fcp_cmnd_length);
4023 /* stop operation for this adapter */
4024 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4025 "fsf_s_cmd_len_nv");
4026 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4027 zfcp_cmd_dbf_event_fsf("cleninv",
4028 fsf_req,
4029 &header->fsf_status_qual,
4030 sizeof (union fsf_status_qual));
4031 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4032 break;
4033
4034 case FSF_PORT_BOXED:
4035 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
4036 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
4037 "needs to be reopened\n",
4038 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
4039 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
4040 zfcp_erp_port_reopen(unit->port, 0);
4041 zfcp_cmd_dbf_event_fsf("portbox", fsf_req,
4042 &header->fsf_status_qual,
4043 sizeof (union fsf_status_qual));
4044 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
4045 ZFCP_STATUS_FSFREQ_RETRY;
4046 break;
4047
4048 case FSF_LUN_BOXED:
4049 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
4050 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
4051 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
4052 zfcp_get_busid_by_unit(unit),
4053 unit->port->wwpn, unit->fcp_lun);
4054 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
4055 zfcp_erp_unit_reopen(unit, 0);
4056 zfcp_cmd_dbf_event_fsf("unitbox", fsf_req,
4057 &header->fsf_status_qual,
4058 sizeof(union fsf_status_qual));
4059 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
4060 | ZFCP_STATUS_FSFREQ_RETRY;
4061 break;
4062
4063 case FSF_ADAPTER_STATUS_AVAILABLE:
4064 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
4065 switch (header->fsf_status_qual.word[0]) {
4066 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
4067 ZFCP_LOG_FLAGS(2,
4068 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
4069 /* re-establish link to port */
4070 debug_text_event(fsf_req->adapter->erp_dbf, 1,
4071 "fsf_sq_ltest");
4072 zfcp_erp_port_reopen(unit->port, 0);
4073 zfcp_cmd_dbf_event_fsf(
4074 "sqltest",
4075 fsf_req,
4076 &header->fsf_status_qual,
4077 sizeof (union fsf_status_qual));
4078 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4079 break;
4080 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
4081 ZFCP_LOG_FLAGS(3,
4082 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
4083 /* FIXME(hw) need proper specs for proper action */
4084 /* let scsi stack deal with retries and escalation */
4085 debug_text_event(fsf_req->adapter->erp_dbf, 1,
4086 "fsf_sq_ulp");
4087 zfcp_cmd_dbf_event_fsf(
4088 "sqdeperp",
4089 fsf_req,
4090 &header->fsf_status_qual,
4091 sizeof (union fsf_status_qual));
4092 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4093 break;
4094 default:
4095 /* FIXME: shall we consider this a successful transfer? */
4096 ZFCP_LOG_NORMAL
4097 ("bug: Wrong status qualifier 0x%x arrived.\n",
4098 header->fsf_status_qual.word[0]);
4099 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4100 "fsf_sq_inval:");
4101 debug_exception(fsf_req->adapter->erp_dbf, 0,
4102 &header->fsf_status_qual.word[0],
4103 sizeof(u32));
4104 break;
4105 }
4106 break;
4107
4108 case FSF_GOOD:
4109 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
4110 break;
4111
4112 case FSF_FCP_RSP_AVAILABLE:
4113 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
4114 break;
4115
4116 default:
4117 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
4118 debug_exception(fsf_req->adapter->erp_dbf, 0,
4119 &header->fsf_status, sizeof(u32));
4120 break;
4121 }
4122
4123 skip_fsfstatus:
4124 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
4125 retval =
4126 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
4127 } else {
4128 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
4129 }
4130 return retval;
4131}
4132
4133/*
4134 * function: zfcp_fsf_send_fcp_command_task_handler
4135 *
4136 * purpose: evaluates FCP_RSP IU
4137 *
4138 * returns:
4139 */
4140static int
4141zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
4142{
4143 int retval = 0;
4144 struct scsi_cmnd *scpnt;
4145 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4146 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4147 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
4148 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
4149 u32 sns_len;
4150 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4151 unsigned long flags;
4152 struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit;
4153
4154 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
4155 scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
4156 if (unlikely(!scpnt)) {
4157 ZFCP_LOG_DEBUG
4158 ("Command with fsf_req %p is not associated to "
4159 "a scsi command anymore. Aborted?\n", fsf_req);
4160 goto out;
4161 }
4162 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4163 /* FIXME: (design) mid-layer should handle DID_ABORT like
4164 * DID_SOFT_ERROR by retrying the request for devices
4165 * that allow retries.
4166 */
4167 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4168 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4169 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4170 goto skip_fsfstatus;
4171 }
4172
4173 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4174 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4175 set_host_byte(&scpnt->result, DID_ERROR);
4176 goto skip_fsfstatus;
4177 }
4178
4179 /* set message byte of result in SCSI command */
4180 scpnt->result |= COMMAND_COMPLETE << 8;
4181
4182 /*
4183 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4184 * of result in SCSI command
4185 */
4186 scpnt->result |= fcp_rsp_iu->scsi_status;
4187 if (unlikely(fcp_rsp_iu->scsi_status)) {
4188 /* DEBUG */
4189 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4190 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4191 scpnt->cmnd, scpnt->cmd_len);
4192 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4193 fcp_rsp_iu->scsi_status);
4194 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4195 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4196 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4197 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4198 fcp_rsp_iu->fcp_sns_len);
4199 }
4200
4201 /* check FCP_RSP_INFO */
4202 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4203 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4204 switch (fcp_rsp_info[3]) {
4205 case RSP_CODE_GOOD:
4206 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4207 /* ok, continue */
4208 ZFCP_LOG_TRACE("no failure or Task Management "
4209 "Function complete\n");
4210 set_host_byte(&scpnt->result, DID_OK);
4211 break;
4212 case RSP_CODE_LENGTH_MISMATCH:
4213 ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n");
4214 /* hardware bug */
4215 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4216 "that the fibrechannel protocol data "
4217 "length differs from the burst length. "
4218 "The problem occured on unit 0x%016Lx "
4219 "on port 0x%016Lx on adapter %s",
4220 unit->fcp_lun,
4221 unit->port->wwpn,
4222 zfcp_get_busid_by_unit(unit));
4223 /* dump SCSI CDB as prepared by zfcp */
4224 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4225 (char *) &fsf_req->qtcb->
4226 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4227 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4228 set_host_byte(&scpnt->result, DID_ERROR);
4229 goto skip_fsfstatus;
4230 case RSP_CODE_FIELD_INVALID:
4231 ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n");
4232 /* driver or hardware bug */
4233 ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4234 "that the fibrechannel protocol data "
4235 "fields were incorrectly set up. "
4236 "The problem occured on the unit "
4237 "0x%016Lx on port 0x%016Lx on "
4238 "adapter %s",
4239 unit->fcp_lun,
4240 unit->port->wwpn,
4241 zfcp_get_busid_by_unit(unit));
4242 /* dump SCSI CDB as prepared by zfcp */
4243 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4244 (char *) &fsf_req->qtcb->
4245 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4246 set_host_byte(&scpnt->result, DID_ERROR);
4247 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4248 goto skip_fsfstatus;
4249 case RSP_CODE_RO_MISMATCH:
4250 ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n");
4251 /* hardware bug */
4252 ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4253 "that conflicting values for the "
4254 "fibrechannel payload offset from the "
4255 "header were found. "
4256 "The problem occured on unit 0x%016Lx "
4257 "on port 0x%016Lx on adapter %s.\n",
4258 unit->fcp_lun,
4259 unit->port->wwpn,
4260 zfcp_get_busid_by_unit(unit));
4261 /* dump SCSI CDB as prepared by zfcp */
4262 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4263 (char *) &fsf_req->qtcb->
4264 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4265 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4266 set_host_byte(&scpnt->result, DID_ERROR);
4267 goto skip_fsfstatus;
4268 default:
4269 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4270 "code was detected for a command. "
4271 "The problem occured on the unit "
4272 "0x%016Lx on port 0x%016Lx on "
4273 "adapter %s (debug info 0x%x)\n",
4274 unit->fcp_lun,
4275 unit->port->wwpn,
4276 zfcp_get_busid_by_unit(unit),
4277 fcp_rsp_info[3]);
4278 /* dump SCSI CDB as prepared by zfcp */
4279 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4280 (char *) &fsf_req->qtcb->
4281 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4282 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4283 set_host_byte(&scpnt->result, DID_ERROR);
4284 }
4285 }
4286
4287 /* check for sense data */
4288 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4289 sns_len = FSF_FCP_RSP_SIZE -
4290 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4291 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4292 sns_len);
4293 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4294 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4295 SCSI_SENSE_BUFFERSIZE);
4296 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4297 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4298 scpnt->result);
4299 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4300 (void *) &scpnt->cmnd, scpnt->cmd_len);
4301
4302 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4303 fcp_rsp_iu->fcp_sns_len);
4304 memcpy(&scpnt->sense_buffer,
4305 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4306 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4307 (void *) &scpnt->sense_buffer, sns_len);
4308 }
4309
4310 /* check for overrun */
4311 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4312 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4313 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4314 "The response data length is "
4315 "%d, the original length was %d.\n",
4316 unit->fcp_lun,
4317 unit->port->wwpn,
4318 zfcp_get_busid_by_unit(unit),
4319 fcp_rsp_iu->fcp_resid,
4320 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4321 }
4322
4323 /* check for underrun */
4324 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4325 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4326 "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4327 "The response data length is "
4328 "%d, the original length was %d.\n",
4329 unit->fcp_lun,
4330 unit->port->wwpn,
4331 zfcp_get_busid_by_unit(unit),
4332 fcp_rsp_iu->fcp_resid,
4333 (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4334
4335 scpnt->resid = fcp_rsp_iu->fcp_resid;
4336 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4337 scpnt->result |= DID_ERROR << 16;
4338 }
4339
4340 skip_fsfstatus:
4341 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4342
4343 zfcp_cmd_dbf_event_scsi("response", scpnt);
4344
4345 /* cleanup pointer (need this especially for abort) */
4346 scpnt->host_scribble = NULL;
4347
4348 /*
4349 * NOTE:
4350 * according to the outcome of a discussion on linux-scsi we
4351 * don't need to grab the io_request_lock here since we use
4352 * the new eh
4353 */
4354 /* always call back */
4355
4356 (scpnt->scsi_done) (scpnt);
4357
4358 /*
4359 * We must hold this lock until scsi_done has been called.
4360 * Otherwise we may call scsi_done after abort regarding this
4361 * command has completed.
4362 * Note: scsi_done must not block!
4363 */
4364 out:
4365 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4366 return retval;
4367}
4368
4369/*
4370 * function: zfcp_fsf_send_fcp_command_task_management_handler
4371 *
4372 * purpose: evaluates FCP_RSP IU
4373 *
4374 * returns:
4375 */
4376static int
4377zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4378{
4379 int retval = 0;
4380 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4381 &(fsf_req->qtcb->bottom.io.fcp_rsp);
4382 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4383 struct zfcp_unit *unit =
4384 fsf_req->data.send_fcp_command_task_management.unit;
4385
4386 del_timer(&fsf_req->adapter->scsi_er_timer);
4387 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4388 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4389 goto skip_fsfstatus;
4390 }
4391
4392 /* check FCP_RSP_INFO */
4393 switch (fcp_rsp_info[3]) {
4394 case RSP_CODE_GOOD:
4395 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4396 /* ok, continue */
4397 ZFCP_LOG_DEBUG("no failure or Task Management "
4398 "Function complete\n");
4399 break;
4400 case RSP_CODE_TASKMAN_UNSUPP:
4401 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n");
4402 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4403 "is not supported on the target device "
4404 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4405 unit->fcp_lun,
4406 unit->port->wwpn,
4407 zfcp_get_busid_by_unit(unit));
4408 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4409 break;
4410 case RSP_CODE_TASKMAN_FAILED:
4411 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n");
4412 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4413 "failed to complete successfully. "
4414 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4415 unit->fcp_lun,
4416 unit->port->wwpn,
4417 zfcp_get_busid_by_unit(unit));
4418 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4419 break;
4420 default:
4421 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4422 "code was detected for a command. "
4423 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4424 "(debug info 0x%x)\n",
4425 unit->fcp_lun,
4426 unit->port->wwpn,
4427 zfcp_get_busid_by_unit(unit),
4428 fcp_rsp_info[3]);
4429 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4430 }
4431
4432 skip_fsfstatus:
4433 return retval;
4434}
4435
4436
4437/*
4438 * function: zfcp_fsf_control_file
4439 *
4440 * purpose: Initiator of the control file upload/download FSF requests
4441 *
4442 * returns: 0 - FSF request is successfuly created and queued
4443 * -EOPNOTSUPP - The FCP adapter does not have Control File support
4444 * -EINVAL - Invalid direction specified
4445 * -ENOMEM - Insufficient memory
4446 * -EPERM - Cannot create FSF request or place it in QDIO queue
4447 */
4448int
4449zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4450 struct zfcp_fsf_req **fsf_req_ptr,
4451 u32 fsf_command,
4452 u32 option,
4453 struct zfcp_sg_list *sg_list)
4454{
4455 struct zfcp_fsf_req *fsf_req;
4456 struct fsf_qtcb_bottom_support *bottom;
4457 volatile struct qdio_buffer_element *sbale;
4458 struct timer_list *timer;
4459 unsigned long lock_flags;
4460 int req_flags = 0;
4461 int direction;
4462 int retval = 0;
4463
4464 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4465 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4466 zfcp_get_busid_by_adapter(adapter));
4467 retval = -EOPNOTSUPP;
4468 goto out;
4469 }
4470
4471 switch (fsf_command) {
4472
4473 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4474 direction = SBAL_FLAGS0_TYPE_WRITE;
4475 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4476 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4477 req_flags = ZFCP_WAIT_FOR_SBAL;
4478 break;
4479
4480 case FSF_QTCB_UPLOAD_CONTROL_FILE:
4481 direction = SBAL_FLAGS0_TYPE_READ;
4482 break;
4483
4484 default:
4485 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4486 retval = -EINVAL;
4487 goto out;
4488 }
4489
4490 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4491 if (!timer) {
4492 retval = -ENOMEM;
4493 goto out;
4494 }
4495
4496 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4497 NULL, &lock_flags, &fsf_req);
4498 if (retval < 0) {
4499 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4500 "adapter %s\n",
4501 zfcp_get_busid_by_adapter(adapter));
4502 retval = -EPERM;
4503 goto unlock_queue_lock;
4504 }
4505
4506 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4507 sbale[0].flags |= direction;
4508
4509 bottom = &fsf_req->qtcb->bottom.support;
4510 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4511 bottom->option = option;
4512
4513 if (sg_list->count > 0) {
4514 int bytes;
4515
4516 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4517 sg_list->sg, sg_list->count,
4518 ZFCP_MAX_SBALS_PER_REQ);
4519 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4520 ZFCP_LOG_INFO(
4521 "error: Could not create sufficient number of "
4522 "SBALS for an FSF request to the adapter %s\n",
4523 zfcp_get_busid_by_adapter(adapter));
4524 retval = -ENOMEM;
4525 goto free_fsf_req;
4526 }
4527 } else
4528 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4529
4530 init_timer(timer);
4531 timer->function = zfcp_fsf_request_timeout_handler;
4532 timer->data = (unsigned long) adapter;
4533 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4534
4535 retval = zfcp_fsf_req_send(fsf_req, timer);
4536 if (retval < 0) {
4537 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4538 "(adapter %s)\n",
4539 zfcp_get_busid_by_adapter(adapter));
4540 retval = -EPERM;
4541 goto free_fsf_req;
4542 }
4543 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4544
4545 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4546 "adapter %s\n",
4547 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4548 "download" : "upload",
4549 zfcp_get_busid_by_adapter(adapter));
4550
4551 wait_event(fsf_req->completion_wq,
4552 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4553
4554 *fsf_req_ptr = fsf_req;
4555 del_timer_sync(timer);
4556 goto free_timer;
4557
4558 free_fsf_req:
4559 zfcp_fsf_req_free(fsf_req);
4560 unlock_queue_lock:
4561 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4562 free_timer:
4563 kfree(timer);
4564 out:
4565 return retval;
4566}
4567
4568
4569/*
4570 * function: zfcp_fsf_control_file_handler
4571 *
4572 * purpose: Handler of the control file upload/download FSF requests
4573 *
4574 * returns: 0 - FSF request successfuly processed
4575 * -EAGAIN - Operation has to be repeated because of a temporary problem
4576 * -EACCES - There is no permission to execute an operation
4577 * -EPERM - The control file is not in a right format
4578 * -EIO - There is a problem with the FCP adapter
4579 * -EINVAL - Invalid operation
4580 * -EFAULT - User space memory I/O operation fault
4581 */
4582static int
4583zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4584{
4585 struct zfcp_adapter *adapter = fsf_req->adapter;
4586 struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4587 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4588 int retval = 0;
4589
4590 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4591 retval = -EINVAL;
4592 goto skip_fsfstatus;
4593 }
4594
4595 switch (header->fsf_status) {
4596
4597 case FSF_GOOD:
4598 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
4599 ZFCP_LOG_NORMAL(
4600 "The FSF request has been successfully completed "
4601 "on the adapter %s\n",
4602 zfcp_get_busid_by_adapter(adapter));
4603 break;
4604
4605 case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4606 ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n");
4607 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4608 switch (header->fsf_status_qual.word[0]) {
4609
4610 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4611 ZFCP_LOG_NORMAL(
4612 "CFDC of the adapter %s could not "
4613 "be saved on the SE\n",
4614 zfcp_get_busid_by_adapter(adapter));
4615 break;
4616
4617 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4618 ZFCP_LOG_NORMAL(
4619 "CFDC of the adapter %s could not "
4620 "be copied to the secondary SE\n",
4621 zfcp_get_busid_by_adapter(adapter));
4622 break;
4623
4624 default:
4625 ZFCP_LOG_NORMAL(
4626 "CFDC could not be hardened "
4627 "on the adapter %s\n",
4628 zfcp_get_busid_by_adapter(adapter));
4629 }
4630 }
4631 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4632 retval = -EAGAIN;
4633 break;
4634
4635 case FSF_AUTHORIZATION_FAILURE:
4636 ZFCP_LOG_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n");
4637 ZFCP_LOG_NORMAL(
4638 "Adapter %s does not accept privileged commands\n",
4639 zfcp_get_busid_by_adapter(adapter));
4640 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4641 retval = -EACCES;
4642 break;
4643
4644 case FSF_CFDC_ERROR_DETECTED:
4645 ZFCP_LOG_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n");
4646 ZFCP_LOG_NORMAL(
4647 "Error at position %d in the CFDC, "
4648 "CFDC is discarded by the adapter %s\n",
4649 header->fsf_status_qual.word[0],
4650 zfcp_get_busid_by_adapter(adapter));
4651 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4652 retval = -EPERM;
4653 break;
4654
4655 case FSF_CONTROL_FILE_UPDATE_ERROR:
4656 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n");
4657 ZFCP_LOG_NORMAL(
4658 "Adapter %s cannot harden the control file, "
4659 "file is discarded\n",
4660 zfcp_get_busid_by_adapter(adapter));
4661 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4662 retval = -EIO;
4663 break;
4664
4665 case FSF_CONTROL_FILE_TOO_LARGE:
4666 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n");
4667 ZFCP_LOG_NORMAL(
4668 "Control file is too large, file is discarded "
4669 "by the adapter %s\n",
4670 zfcp_get_busid_by_adapter(adapter));
4671 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4672 retval = -EIO;
4673 break;
4674
4675 case FSF_ACCESS_CONFLICT_DETECTED:
4676 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n");
4677 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4678 ZFCP_LOG_NORMAL(
4679 "CFDC has been discarded by the adapter %s, "
4680 "because activation would impact "
4681 "%d active connection(s)\n",
4682 zfcp_get_busid_by_adapter(adapter),
4683 header->fsf_status_qual.word[0]);
4684 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4685 retval = -EIO;
4686 break;
4687
4688 case FSF_CONFLICTS_OVERRULED:
4689 ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n");
4690 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4691 ZFCP_LOG_NORMAL(
4692 "CFDC has been activated on the adapter %s, "
4693 "but activation has impacted "
4694 "%d active connection(s)\n",
4695 zfcp_get_busid_by_adapter(adapter),
4696 header->fsf_status_qual.word[0]);
4697 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4698 retval = -EIO;
4699 break;
4700
4701 case FSF_UNKNOWN_OP_SUBTYPE:
4702 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
4703 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4704 "op_subtype=0x%x)\n",
4705 zfcp_get_busid_by_adapter(adapter),
4706 bottom->operation_subtype);
4707 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4708 retval = -EINVAL;
4709 break;
4710
4711 case FSF_INVALID_COMMAND_OPTION:
4712 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
4713 ZFCP_LOG_NORMAL(
4714 "Invalid option 0x%x has been specified "
4715 "in QTCB bottom sent to the adapter %s\n",
4716 bottom->option,
4717 zfcp_get_busid_by_adapter(adapter));
4718 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4719 retval = -EINVAL;
4720 break;
4721
4722 default:
4723 ZFCP_LOG_NORMAL(
4724 "bug: An unknown/unexpected FSF status 0x%08x "
4725 "was presented on the adapter %s\n",
4726 header->fsf_status,
4727 zfcp_get_busid_by_adapter(adapter));
4728 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4729 debug_exception(fsf_req->adapter->erp_dbf, 0,
4730 &header->fsf_status_qual.word[0], sizeof(u32));
4731 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4732 retval = -EINVAL;
4733 break;
4734 }
4735
4736skip_fsfstatus:
4737 return retval;
4738}
4739
4740
4741/*
4742 * function: zfcp_fsf_req_wait_and_cleanup
4743 *
4744 * purpose:
4745 *
4746 * FIXME(design): signal seems to be <0 !!!
4747 * returns: 0 - request completed (*status is valid), cleanup succ.
4748 * <0 - request completed (*status is valid), cleanup failed
4749 * >0 - signal which interrupted waiting (*status invalid),
4750 * request not completed, no cleanup
4751 *
4752 * *status is a copy of status of completed fsf_req
4753 */
4754int
4755zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
4756 int interruptible, u32 * status)
4757{
4758 int retval = 0;
4759 int signal = 0;
4760
4761 if (interruptible) {
4762 __wait_event_interruptible(fsf_req->completion_wq,
4763 fsf_req->status &
4764 ZFCP_STATUS_FSFREQ_COMPLETED,
4765 signal);
4766 if (signal) {
4767 ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
4768 "completion of the request at %p\n",
4769 signal, fsf_req);
4770 retval = signal;
4771 goto out;
4772 }
4773 } else {
4774 __wait_event(fsf_req->completion_wq,
4775 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4776 }
4777
4778 *status = fsf_req->status;
4779
4780 /* cleanup request */
4781 zfcp_fsf_req_cleanup(fsf_req);
4782 out:
4783 return retval;
4784}
4785
4786static inline int
4787zfcp_fsf_req_sbal_check(unsigned long *flags,
4788 struct zfcp_qdio_queue *queue, int needed)
4789{
4790 write_lock_irqsave(&queue->queue_lock, *flags);
4791 if (likely(atomic_read(&queue->free_count) >= needed))
4792 return 1;
4793 write_unlock_irqrestore(&queue->queue_lock, *flags);
4794 return 0;
4795}
4796
4797/*
4798 * set qtcb pointer in fsf_req and initialize QTCB
4799 */
4800static inline void
4801zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4802{
4803 if (likely(fsf_req->qtcb != NULL)) {
4804 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4805 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4806 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4807 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4808 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4809 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4810 }
4811}
4812
4813/**
4814 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4815 * @adapter: adapter for which request queue is examined
4816 * @req_flags: flags indicating whether to wait for needed SBAL or not
4817 * @lock_flags: lock_flags if queue_lock is taken
4818 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4819 * Locks: lock adapter->request_queue->queue_lock on success
4820 */
4821static int
4822zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4823 unsigned long *lock_flags)
4824{
4825 long ret;
4826 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4827
4828 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4829 ret = wait_event_interruptible_timeout(adapter->request_wq,
4830 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4831 ZFCP_SBAL_TIMEOUT);
4832 if (ret < 0)
4833 return ret;
4834 if (!ret)
4835 return -EIO;
4836 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4837 return -EIO;
4838
4839 return 0;
4840}
4841
4842/*
4843 * function: zfcp_fsf_req_create
4844 *
4845 * purpose: create an FSF request at the specified adapter and
4846 * setup common fields
4847 *
4848 * returns: -ENOMEM if there was insufficient memory for a request
4849 * -EIO if no qdio buffers could be allocate to the request
4850 * -EINVAL/-EPERM on bug conditions in req_dequeue
4851 * 0 in success
4852 *
4853 * note: The created request is returned by reference.
4854 *
4855 * locks: lock of concerned request queue must not be held,
4856 * but is held on completion (write, irqsave)
4857 */
4858int
4859zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4860 mempool_t *pool, unsigned long *lock_flags,
4861 struct zfcp_fsf_req **fsf_req_p)
4862{
4863 volatile struct qdio_buffer_element *sbale;
4864 struct zfcp_fsf_req *fsf_req = NULL;
4865 int ret = 0;
4866 struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4867
4868 /* allocate new FSF request */
4869 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4870 if (unlikely(NULL == fsf_req)) {
4871 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4872 "the outbound (send) queue.\n");
4873 ret = -ENOMEM;
4874 goto failed_fsf_req;
4875 }
4876
4877 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
4878
4879 /* initialize waitqueue which may be used to wait on
4880 this request completion */
4881 init_waitqueue_head(&fsf_req->completion_wq);
4882
4883 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4884 if(ret < 0) {
4885 goto failed_sbals;
4886 }
4887
4888 /*
4889 * We hold queue_lock here. Check if QDIOUP is set and let request fail
4890 * if it is not set (see also *_open_qdio and *_close_qdio).
4891 */
4892
4893 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4894 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4895 ret = -EIO;
4896 goto failed_sbals;
4897 }
4898
4899 fsf_req->adapter = adapter; /* pointer to "parent" adapter */
4900 fsf_req->fsf_command = fsf_cmd;
4901 fsf_req->sbal_number = 1;
4902 fsf_req->sbal_first = req_queue->free_index;
4903 fsf_req->sbal_curr = req_queue->free_index;
4904 fsf_req->sbale_curr = 1;
4905
4906 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4907 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4908 }
4909
4910 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4911
4912 /* setup common SBALE fields */
4913 sbale[0].addr = fsf_req;
4914 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4915 if (likely(fsf_req->qtcb != NULL)) {
4916 sbale[1].addr = (void *) fsf_req->qtcb;
4917 sbale[1].length = sizeof(struct fsf_qtcb);
4918 }
4919
4920 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4921 fsf_req->sbal_number, fsf_req->sbal_first);
4922
4923 goto success;
4924
4925 failed_sbals:
4926/* dequeue new FSF request previously enqueued */
4927 zfcp_fsf_req_free(fsf_req);
4928 fsf_req = NULL;
4929
4930 failed_fsf_req:
4931 write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4932 success:
4933 *fsf_req_p = fsf_req;
4934 return ret;
4935}
4936
4937/*
4938 * function: zfcp_fsf_req_send
4939 *
4940 * purpose: start transfer of FSF request via QDIO
4941 *
4942 * returns: 0 - request transfer succesfully started
4943 * !0 - start of request transfer failed
4944 */
4945static int
4946zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4947{
4948 struct zfcp_adapter *adapter;
4949 struct zfcp_qdio_queue *req_queue;
4950 volatile struct qdio_buffer_element *sbale;
4951 int new_distance_from_int;
4952 unsigned long flags;
4953 int inc_seq_no = 1;
4954 int retval = 0;
4955
4956 adapter = fsf_req->adapter;
4957 req_queue = &adapter->request_queue,
4958
4959
4960 /* FIXME(debug): remove it later */
4961 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4962 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4963 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4964 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4965 sbale[1].length);
4966
4967 /* set sequence counter in QTCB */
4968 if (likely(fsf_req->qtcb)) {
4969 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4970 fsf_req->seq_no = adapter->fsf_req_seq_no;
4971 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4972 "FSF sequence counter value of %i\n",
4973 fsf_req,
4974 zfcp_get_busid_by_adapter(adapter),
4975 fsf_req->qtcb->prefix.req_seq_no);
4976 } else
4977 inc_seq_no = 0;
4978
4979 /* put allocated FSF request at list tail */
4980 write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4981 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
4982 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4983
4984 /* figure out expiration time of timeout and start timeout */
4985 if (unlikely(timer)) {
4986 timer->expires += jiffies;
4987 add_timer(timer);
4988 }
4989
4990 ZFCP_LOG_TRACE("request queue of adapter %s: "
4991 "next free SBAL is %i, %i free SBALs\n",
4992 zfcp_get_busid_by_adapter(adapter),
4993 req_queue->free_index,
4994 atomic_read(&req_queue->free_count));
4995
4996 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4997 "index_in_queue=%i, count=%i, buffers=%p\n",
4998 zfcp_get_busid_by_adapter(adapter),
4999 QDIO_FLAG_SYNC_OUTPUT,
5000 0, fsf_req->sbal_first, fsf_req->sbal_number,
5001 &req_queue->buffer[fsf_req->sbal_first]);
5002
5003 /*
5004 * adjust the number of free SBALs in request queue as well as
5005 * position of first one
5006 */
5007 atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
5008 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
5009 req_queue->free_index += fsf_req->sbal_number; /* increase */
5010 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
5011 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
5012
5013 retval = do_QDIO(adapter->ccw_device,
5014 QDIO_FLAG_SYNC_OUTPUT,
5015 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
5016
5017 if (unlikely(retval)) {
5018 /* Queues are down..... */
5019 retval = -EIO;
5020 /*
5021 * FIXME(potential race):
5022 * timer might be expired (absolutely unlikely)
5023 */
5024 if (timer)
5025 del_timer(timer);
5026 write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5027 list_del(&fsf_req->list);
5028 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5029 /*
5030 * adjust the number of free SBALs in request queue as well as
5031 * position of first one
5032 */
5033 zfcp_qdio_zero_sbals(req_queue->buffer,
5034 fsf_req->sbal_first, fsf_req->sbal_number);
5035 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
5036 req_queue->free_index -= fsf_req->sbal_number; /* increase */
5037 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
5038 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
5039 ZFCP_LOG_DEBUG
5040 ("error: do_QDIO failed. Buffers could not be enqueued "
5041 "to request queue.\n");
5042 } else {
5043 req_queue->distance_from_int = new_distance_from_int;
5044 /*
5045 * increase FSF sequence counter -
5046 * this must only be done for request successfully enqueued to
5047 * QDIO this rejected requests may be cleaned up by calling
5048 * routines resulting in missing sequence counter values
5049 * otherwise,
5050 */
5051 /* Don't increase for unsolicited status */
5052 if (likely(inc_seq_no)) {
5053 adapter->fsf_req_seq_no++;
5054 ZFCP_LOG_TRACE
5055 ("FSF sequence counter value of adapter %s "
5056 "increased to %i\n",
5057 zfcp_get_busid_by_adapter(adapter),
5058 adapter->fsf_req_seq_no);
5059 }
5060 /* count FSF requests pending */
5061 atomic_inc(&adapter->fsf_reqs_active);
5062 }
5063 return retval;
5064}
5065
5066/*
5067 * function: zfcp_fsf_req_cleanup
5068 *
5069 * purpose: cleans up an FSF request and removes it from the specified list
5070 *
5071 * returns:
5072 *
5073 * assumption: no pending SB in SBALEs other than QTCB
5074 */
5075void
5076zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req)
5077{
5078 struct zfcp_adapter *adapter = fsf_req->adapter;
5079 unsigned long flags;
5080
5081 write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5082 list_del(&fsf_req->list);
5083 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5084 zfcp_fsf_req_free(fsf_req);
5085}
5086
5087#undef ZFCP_LOG_AREA
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 08:58:31 -0500