4 * Implementation of FSF commands.
6 * Copyright IBM Corporation 2002, 2008
11 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
12 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
13 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
14 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
15 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
16 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
17 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
18 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
19 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
20 static int zfcp_fsf_send_fcp_command_task_management_handler(
21 struct zfcp_fsf_req *);
22 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
23 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
24 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
25 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
26 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
27 static inline int zfcp_fsf_req_sbal_check(
28 unsigned long *, struct zfcp_qdio_queue *, int);
29 static inline int zfcp_use_one_sbal(
30 struct scatterlist *, int, struct scatterlist *, int);
31 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
32 static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
33 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
34 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
35 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
36 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
37 struct fsf_link_down_info *);
38 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
40 /* association between FSF command and FSF QTCB type */
41 static u32 fsf_qtcb_type[] = {
42 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
43 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
52 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
53 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
57 static const char zfcp_act_subtable_type[5][8] = {
58 "unknown", "OS", "WWPN", "DID", "LUN"
61 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
63 u16 subtable = (table & 0xffff0000) >> 16;
64 u16 rule = table & 0xffff;
67 subtable < ARRAY_SIZE(zfcp_act_subtable_type)) {
68 dev_warn(&adapter->ccw_device->dev,
69 "Access denied in subtable %s, rule %d.\n",
70 zfcp_act_subtable_type[subtable], rule);
74 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
75 struct zfcp_port *port)
77 struct fsf_qtcb_header *header = &req->qtcb->header;
78 dev_warn(&req->adapter->ccw_device->dev,
79 "Access denied, cannot send command to port 0x%016Lx.\n",
81 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
82 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
83 zfcp_erp_port_access_denied(port, 55, req);
84 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
87 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
88 struct zfcp_unit *unit)
90 struct fsf_qtcb_header *header = &req->qtcb->header;
91 dev_warn(&req->adapter->ccw_device->dev,
92 "Access denied for unit 0x%016Lx on port 0x%016Lx.\n",
93 unit->fcp_lun, unit->port->wwpn);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
95 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
96 zfcp_erp_unit_access_denied(unit, 59, req);
97 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
100 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
102 dev_err(&req->adapter->ccw_device->dev,
103 "Required FC class not supported by adapter, "
104 "shutting down adapter.\n");
105 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
106 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
109 /****************************************************************/
110 /*************** FSF related Functions *************************/
111 /****************************************************************/
114 * function: zfcp_fsf_req_alloc
116 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
117 * unsolicited requests) via helper functions
118 * Does some initial fsf request set-up.
120 * returns: pointer to allocated fsf_req if successfull
126 static struct zfcp_fsf_req *
127 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
131 struct zfcp_fsf_req *fsf_req = NULL;
133 if (req_flags & ZFCP_REQ_NO_QTCB)
134 size = sizeof(struct zfcp_fsf_req);
136 size = sizeof(struct zfcp_fsf_req_qtcb);
139 ptr = mempool_alloc(pool, GFP_ATOMIC);
141 if (req_flags & ZFCP_REQ_NO_QTCB)
142 ptr = kmalloc(size, GFP_ATOMIC);
144 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
151 memset(ptr, 0, size);
153 if (req_flags & ZFCP_REQ_NO_QTCB) {
154 fsf_req = (struct zfcp_fsf_req *) ptr;
156 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
157 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
160 fsf_req->pool = pool;
167 * function: zfcp_fsf_req_free
169 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
170 * returns it into the pool via helper functions.
177 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
179 if (likely(fsf_req->pool)) {
180 mempool_free(fsf_req, fsf_req->pool);
185 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
193 * Never ever call this without shutting down the adapter first.
194 * Otherwise the adapter would continue using and corrupting s390 storage.
195 * Included BUG_ON() call to ensure this is done.
196 * ERP is supposed to be the only user of this function.
198 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
200 struct zfcp_fsf_req *fsf_req, *tmp;
202 LIST_HEAD(remove_queue);
205 BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
206 spin_lock_irqsave(&adapter->req_list_lock, flags);
207 for (i = 0; i < REQUEST_LIST_SIZE; i++)
208 list_splice_init(&adapter->req_list[i], &remove_queue);
209 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
211 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
212 list_del(&fsf_req->list);
213 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
214 zfcp_fsf_req_complete(fsf_req);
219 * function: zfcp_fsf_req_complete
221 * purpose: Updates active counts and timers for openfcp-reqs
222 * May cleanup request after req_eval returns
224 * returns: 0 - success
230 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
235 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
237 * Note: all cleanup handling is done in the callchain of
238 * the function call-chain below.
240 zfcp_fsf_status_read_handler(fsf_req);
243 del_timer(&fsf_req->timer);
244 zfcp_fsf_protstatus_eval(fsf_req);
248 * fsf_req may be deleted due to waking up functions, so
249 * cleanup is saved here and used later
251 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
256 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
258 /* cleanup request if requested by initiator */
259 if (likely(cleanup)) {
261 * lock must not be held here since it will be
262 * grabed by the called routine, too
264 zfcp_fsf_req_free(fsf_req);
266 /* notify initiator waiting for the requests completion */
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)
277 wake_up(&fsf_req->completion_wq);
285 * function: zfcp_fsf_protstatus_eval
287 * purpose: evaluates the QTCB of the finished FSF request
288 * and initiates appropriate actions
289 * (usually calling FSF command specific handlers)
298 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
301 struct zfcp_adapter *adapter = fsf_req->adapter;
302 struct fsf_qtcb *qtcb = fsf_req->qtcb;
303 union fsf_prot_status_qual *prot_status_qual =
304 &qtcb->prefix.prot_status_qual;
306 zfcp_hba_dbf_event_fsf_response(fsf_req);
308 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
309 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
310 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
311 goto skip_protstatus;
314 /* evaluate FSF Protocol Status */
315 switch (qtcb->prefix.prot_status) {
318 case FSF_PROT_FSF_STATUS_PRESENTED:
321 case FSF_PROT_QTCB_VERSION_ERROR:
322 dev_err(&adapter->ccw_device->dev,
323 "The QTCB version requested by zfcp (0x%x) is not "
324 "supported by the FCP adapter (lowest supported 0x%x, "
325 "highest supported 0x%x).\n",
326 ZFCP_QTCB_VERSION, prot_status_qual->word[0],
327 prot_status_qual->word[1]);
328 zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
329 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
332 case FSF_PROT_SEQ_NUMB_ERROR:
333 zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
334 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
335 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
338 case FSF_PROT_UNSUPP_QTCB_TYPE:
339 dev_err(&adapter->ccw_device->dev,
340 "Packet header type used by the device driver is "
341 "incompatible with that used on the adapter.\n");
342 zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
343 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
346 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
347 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
348 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
352 case FSF_PROT_DUPLICATE_REQUEST_ID:
353 dev_err(&adapter->ccw_device->dev,
354 "The request identifier 0x%Lx is ambiguous.\n",
355 (unsigned long long)qtcb->bottom.support.req_handle);
356 zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
357 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
360 case FSF_PROT_LINK_DOWN:
361 zfcp_fsf_link_down_info_eval(fsf_req, 37,
362 &prot_status_qual->link_down_info);
363 /* FIXME: reopening adapter now? better wait for link up */
364 zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
365 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
368 case FSF_PROT_REEST_QUEUE:
369 /* All ports should be marked as ready to run again */
370 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
371 ZFCP_STATUS_COMMON_RUNNING,
373 zfcp_erp_adapter_reopen(adapter,
374 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
375 | ZFCP_STATUS_COMMON_ERP_FAILED,
377 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
380 case FSF_PROT_ERROR_STATE:
381 zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
382 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
383 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
387 dev_err(&adapter->ccw_device->dev,
388 "Transfer protocol status information"
389 "provided by the adapter (0x%x) "
390 "is not compatible with the device driver.\n",
391 qtcb->prefix.prot_status);
392 zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
398 * always call specific handlers to give them a chance to do
399 * something meaningful even in error cases
401 zfcp_fsf_fsfstatus_eval(fsf_req);
406 * function: zfcp_fsf_fsfstatus_eval
408 * purpose: evaluates FSF status of completed FSF request
409 * and acts accordingly
414 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
418 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
422 /* evaluate FSF Status */
423 switch (fsf_req->qtcb->header.fsf_status) {
424 case FSF_UNKNOWN_COMMAND:
425 dev_err(&fsf_req->adapter->ccw_device->dev,
426 "Command issued by the device driver (0x%x) is "
427 "not known by the adapter.\n",
428 fsf_req->qtcb->header.fsf_command);
429 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
430 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
433 case FSF_ADAPTER_STATUS_AVAILABLE:
434 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
440 * always call specific handlers to give them a chance to do
441 * something meaningful even in error cases
443 zfcp_fsf_req_dispatch(fsf_req);
449 * function: zfcp_fsf_fsfstatus_qual_eval
451 * purpose: evaluates FSF status-qualifier of completed FSF request
452 * and acts accordingly
457 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
461 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
462 case FSF_SQ_FCP_RSP_AVAILABLE:
464 case FSF_SQ_RETRY_IF_POSSIBLE:
465 /* The SCSI-stack may now issue retries or escalate */
466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
468 case FSF_SQ_COMMAND_ABORTED:
469 /* Carry the aborted state on to upper layer */
470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
471 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
473 case FSF_SQ_NO_RECOM:
474 dev_err(&fsf_req->adapter->ccw_device->dev,
475 "No recommendation could be given for a "
476 "problem on the adapter.\n");
477 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
478 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
480 case FSF_SQ_ULP_PROGRAMMING_ERROR:
481 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
483 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
484 case FSF_SQ_NO_RETRY_POSSIBLE:
485 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
486 /* dealt with in the respective functions */
489 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
497 * zfcp_fsf_link_down_info_eval - evaluate link down information block
500 zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
501 struct fsf_link_down_info *link_down)
503 struct zfcp_adapter *adapter = fsf_req->adapter;
505 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
509 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
511 if (link_down == NULL)
514 switch (link_down->error_code) {
515 case FSF_PSQ_LINK_NO_LIGHT:
516 dev_warn(&fsf_req->adapter->ccw_device->dev,
517 "The local link is down: "
518 "no light detected.\n");
520 case FSF_PSQ_LINK_WRAP_PLUG:
521 dev_warn(&fsf_req->adapter->ccw_device->dev,
522 "The local link is down: "
523 "wrap plug detected.\n");
525 case FSF_PSQ_LINK_NO_FCP:
526 dev_warn(&fsf_req->adapter->ccw_device->dev,
527 "The local link is down: "
528 "adjacent node on link does not support FCP.\n");
530 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
531 dev_warn(&fsf_req->adapter->ccw_device->dev,
532 "The local link is down: "
533 "firmware update in progress.\n");
535 case FSF_PSQ_LINK_INVALID_WWPN:
536 dev_warn(&fsf_req->adapter->ccw_device->dev,
537 "The local link is down: "
538 "duplicate or invalid WWPN detected.\n");
540 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
541 dev_warn(&fsf_req->adapter->ccw_device->dev,
542 "The local link is down: "
543 "no support for NPIV by Fabric.\n");
545 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
546 dev_warn(&fsf_req->adapter->ccw_device->dev,
547 "The local link is down: "
548 "out of resource in FCP daughtercard.\n");
550 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
551 dev_warn(&fsf_req->adapter->ccw_device->dev,
552 "The local link is down: "
553 "out of resource in Fabric.\n");
555 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
556 dev_warn(&fsf_req->adapter->ccw_device->dev,
557 "The local link is down: "
558 "unable to login to Fabric.\n");
560 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
561 dev_warn(&fsf_req->adapter->ccw_device->dev,
562 "WWPN assignment file corrupted on adapter.\n");
564 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
565 dev_warn(&fsf_req->adapter->ccw_device->dev,
566 "Mode table corrupted on adapter.\n");
568 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
569 dev_warn(&fsf_req->adapter->ccw_device->dev,
570 "No WWPN for assignment table on adapter.\n");
573 dev_warn(&fsf_req->adapter->ccw_device->dev,
574 "The local link to adapter is down.\n");
578 zfcp_erp_adapter_failed(adapter, id, fsf_req);
582 * function: zfcp_fsf_req_dispatch
584 * purpose: calls the appropriate command specific handler
589 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
591 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
595 switch (fsf_req->fsf_command) {
597 case FSF_QTCB_FCP_CMND:
598 zfcp_fsf_send_fcp_command_handler(fsf_req);
601 case FSF_QTCB_ABORT_FCP_CMND:
602 zfcp_fsf_abort_fcp_command_handler(fsf_req);
605 case FSF_QTCB_SEND_GENERIC:
606 zfcp_fsf_send_ct_handler(fsf_req);
609 case FSF_QTCB_OPEN_PORT_WITH_DID:
610 zfcp_fsf_open_port_handler(fsf_req);
613 case FSF_QTCB_OPEN_LUN:
614 zfcp_fsf_open_unit_handler(fsf_req);
617 case FSF_QTCB_CLOSE_LUN:
618 zfcp_fsf_close_unit_handler(fsf_req);
621 case FSF_QTCB_CLOSE_PORT:
622 zfcp_fsf_close_port_handler(fsf_req);
625 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
626 zfcp_fsf_close_physical_port_handler(fsf_req);
629 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
630 zfcp_fsf_exchange_config_data_handler(fsf_req);
633 case FSF_QTCB_EXCHANGE_PORT_DATA:
634 zfcp_fsf_exchange_port_data_handler(fsf_req);
637 case FSF_QTCB_SEND_ELS:
638 zfcp_fsf_send_els_handler(fsf_req);
641 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
642 zfcp_fsf_control_file_handler(fsf_req);
645 case FSF_QTCB_UPLOAD_CONTROL_FILE:
646 zfcp_fsf_control_file_handler(fsf_req);
653 zfcp_erp_async_handler(erp_action, 0);
659 * function: zfcp_fsf_status_read
661 * purpose: initiates a Status Read command at the specified adapter
666 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
668 struct zfcp_fsf_req *fsf_req;
669 struct fsf_status_read_buffer *status_buffer;
670 unsigned long lock_flags;
671 volatile struct qdio_buffer_element *sbale;
674 /* setup new FSF request */
675 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
676 req_flags | ZFCP_REQ_NO_QTCB,
677 adapter->pool.fsf_req_status_read,
678 &lock_flags, &fsf_req);
680 goto failed_req_create;
682 sbale = zfcp_qdio_sbale_req(fsf_req);
683 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
684 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
685 fsf_req->sbale_curr = 2;
689 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
692 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
693 fsf_req->data = (unsigned long) status_buffer;
695 /* insert pointer to respective buffer */
696 sbale = zfcp_qdio_sbale_curr(fsf_req);
697 sbale->addr = (void *) status_buffer;
698 sbale->length = sizeof(struct fsf_status_read_buffer);
700 retval = zfcp_fsf_req_send(fsf_req);
702 goto failed_req_send;
707 mempool_free(status_buffer, adapter->pool.data_status_read);
710 zfcp_fsf_req_free(fsf_req);
712 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
714 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
719 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
721 struct fsf_status_read_buffer *status_buffer;
722 struct zfcp_adapter *adapter;
723 struct zfcp_port *port;
726 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
727 adapter = fsf_req->adapter;
729 read_lock_irqsave(&zfcp_data.config_lock, flags);
730 list_for_each_entry(port, &adapter->port_list_head, list)
731 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
733 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
735 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK)))
738 switch (status_buffer->status_subtype) {
740 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
741 zfcp_erp_port_reopen(port, 0, 101, fsf_req);
744 case FSF_STATUS_READ_SUB_ERROR_PORT:
745 zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
752 static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
754 struct zfcp_adapter *adapter = req->adapter;
755 struct fsf_status_read_buffer *buf =
756 (struct fsf_status_read_buffer *) req->data;
757 struct fsf_bit_error_payload *err =
758 (struct fsf_bit_error_payload *) buf->payload;
759 dev_warn(&adapter->ccw_device->dev,
760 "Warning: bit error threshold data "
761 "received for the adapter: "
762 "link failures = %i, loss of sync errors = %i, "
763 "loss of signal errors = %i, "
764 "primitive sequence errors = %i, "
765 "invalid transmission word errors = %i, "
766 "CRC errors = %i).\n",
767 err->link_failure_error_count,
768 err->loss_of_sync_error_count,
769 err->loss_of_signal_error_count,
770 err->primitive_sequence_error_count,
771 err->invalid_transmission_word_error_count,
772 err->crc_error_count);
773 dev_warn(&adapter->ccw_device->dev,
774 "Additional bit error threshold data of the adapter: "
775 "primitive sequence event time-outs = %i, "
776 "elastic buffer overrun errors = %i, "
777 "advertised receive buffer-to-buffer credit = %i, "
778 "current receice buffer-to-buffer credit = %i, "
779 "advertised transmit buffer-to-buffer credit = %i, "
780 "current transmit buffer-to-buffer credit = %i).\n",
781 err->primitive_sequence_event_timeout_count,
782 err->elastic_buffer_overrun_error_count,
783 err->advertised_receive_b2b_credit,
784 err->current_receive_b2b_credit,
785 err->advertised_transmit_b2b_credit,
786 err->current_transmit_b2b_credit);
790 * function: zfcp_fsf_status_read_handler
792 * purpose: is called for finished Open Port command
797 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
800 struct zfcp_adapter *adapter = fsf_req->adapter;
801 struct fsf_status_read_buffer *status_buffer =
802 (struct fsf_status_read_buffer *) fsf_req->data;
804 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
805 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
806 mempool_free(status_buffer, adapter->pool.data_status_read);
807 zfcp_fsf_req_free(fsf_req);
811 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
813 switch (status_buffer->status_type) {
815 case FSF_STATUS_READ_PORT_CLOSED:
816 zfcp_fsf_status_read_port_closed(fsf_req);
819 case FSF_STATUS_READ_INCOMING_ELS:
820 zfcp_fc_incoming_els(fsf_req);
823 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
826 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
827 zfcp_fsf_bit_error_threshold(fsf_req);
830 case FSF_STATUS_READ_LINK_DOWN:
831 switch (status_buffer->status_subtype) {
832 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
833 dev_warn(&adapter->ccw_device->dev,
834 "Physical link is down.\n");
835 zfcp_fsf_link_down_info_eval(fsf_req, 38,
836 (struct fsf_link_down_info *)
837 &status_buffer->payload);
839 case FSF_STATUS_READ_SUB_FDISC_FAILED:
840 dev_warn(&adapter->ccw_device->dev,
841 "Local link is down "
842 "due to failed FDISC login.\n");
843 zfcp_fsf_link_down_info_eval(fsf_req, 39,
844 (struct fsf_link_down_info *)
845 &status_buffer->payload);
847 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
848 dev_warn(&adapter->ccw_device->dev,
849 "Local link is down "
850 "due to firmware update on adapter.\n");
851 zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
854 dev_warn(&adapter->ccw_device->dev,
855 "Local link is down.\n");
856 zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
860 case FSF_STATUS_READ_LINK_UP:
861 dev_info(&adapter->ccw_device->dev,
862 "Local link was replugged.\n");
863 /* All ports should be marked as ready to run again */
864 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
865 ZFCP_STATUS_COMMON_RUNNING,
867 zfcp_erp_adapter_reopen(adapter,
868 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
869 | ZFCP_STATUS_COMMON_ERP_FAILED,
873 case FSF_STATUS_READ_NOTIFICATION_LOST:
874 if (status_buffer->status_subtype &
875 FSF_STATUS_READ_SUB_ACT_UPDATED)
876 zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
877 if (status_buffer->status_subtype &
878 FSF_STATUS_READ_SUB_INCOMING_ELS)
879 schedule_work(&adapter->scan_work);
882 case FSF_STATUS_READ_CFDC_UPDATED:
883 zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
886 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
887 adapter->adapter_features = *(u32*) status_buffer->payload;
890 mempool_free(status_buffer, adapter->pool.data_status_read);
891 zfcp_fsf_req_free(fsf_req);
893 * recycle buffer and start new request repeat until outbound
894 * queue is empty or adapter shutdown is requested
898 * we may wait in the req_create for 5s during shutdown, so
899 * qdio_cleanup will have to wait at least that long before returning
900 * with failure to allow us a proper cleanup under all circumstances
904 * allocation failure possible? (Is this code needed?)
907 atomic_inc(&adapter->stat_miss);
908 schedule_work(&adapter->stat_work);
914 * function: zfcp_fsf_abort_fcp_command
916 * purpose: tells FSF to abort a running SCSI command
918 * returns: address of initiated FSF request
919 * NULL - request could not be initiated
921 * FIXME(design): should be watched by a timeout !!!
922 * FIXME(design) shouldn't this be modified to return an int
923 * also...don't know how though
925 struct zfcp_fsf_req *
926 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
927 struct zfcp_adapter *adapter,
928 struct zfcp_unit *unit, int req_flags)
930 volatile struct qdio_buffer_element *sbale;
931 struct zfcp_fsf_req *fsf_req = NULL;
932 unsigned long lock_flags;
935 /* setup new FSF request */
936 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
937 req_flags, adapter->pool.fsf_req_abort,
938 &lock_flags, &fsf_req);
942 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
946 sbale = zfcp_qdio_sbale_req(fsf_req);
947 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
948 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
950 fsf_req->data = (unsigned long) unit;
952 /* set handles of unit and its parent port in QTCB */
953 fsf_req->qtcb->header.lun_handle = unit->handle;
954 fsf_req->qtcb->header.port_handle = unit->port->handle;
956 /* set handle of request which should be aborted */
957 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
959 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
960 retval = zfcp_fsf_req_send(fsf_req);
965 zfcp_fsf_req_free(fsf_req);
969 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
974 * function: zfcp_fsf_abort_fcp_command_handler
976 * purpose: is called for finished Abort FCP Command request
981 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
983 int retval = -EINVAL;
984 struct zfcp_unit *unit;
985 union fsf_status_qual *fsf_stat_qual =
986 &new_fsf_req->qtcb->header.fsf_status_qual;
988 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
989 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
993 unit = (struct zfcp_unit *) new_fsf_req->data;
995 /* evaluate FSF status in QTCB */
996 switch (new_fsf_req->qtcb->header.fsf_status) {
998 case FSF_PORT_HANDLE_NOT_VALID:
999 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1001 * In this case a command that was sent prior to a port
1002 * reopen was aborted (handles are different). This is
1006 /* Let's hope this sorts out the mess */
1007 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
1009 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1013 case FSF_LUN_HANDLE_NOT_VALID:
1014 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1016 * In this case a command that was sent prior to a unit
1017 * reopen was aborted (handles are different).
1021 /* Let's hope this sorts out the mess */
1022 zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
1023 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1027 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1029 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1032 case FSF_PORT_BOXED:
1033 zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
1034 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1035 | ZFCP_STATUS_FSFREQ_RETRY;
1039 zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
1040 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1041 | ZFCP_STATUS_FSFREQ_RETRY;
1044 case FSF_ADAPTER_STATUS_AVAILABLE:
1045 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1046 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1047 zfcp_test_link(unit->port);
1048 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1050 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1051 /* SCSI stack will escalate */
1052 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1059 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1067 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1069 * Two scatter-gather lists are passed, one for the reqeust and one for the
1073 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1074 struct scatterlist *resp, int resp_count)
1076 return ((req_count == 1) &&
1077 (resp_count == 1) &&
1078 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1080 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1081 req[0].length - 1) & PAGE_MASK)) &&
1082 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1084 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1085 resp[0].length - 1) & PAGE_MASK)));
1089 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1090 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1092 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1093 * a struct zfcp_fsf_req
1094 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1095 * is sent within error recovery
1098 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1099 struct zfcp_erp_action *erp_action)
1101 volatile struct qdio_buffer_element *sbale;
1102 struct zfcp_port *port;
1103 struct zfcp_adapter *adapter;
1104 struct zfcp_fsf_req *fsf_req;
1105 unsigned long lock_flags;
1110 adapter = port->adapter;
1112 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1113 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1114 pool, &lock_flags, &fsf_req);
1118 sbale = zfcp_qdio_sbale_req(fsf_req);
1119 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1120 ct->resp, ct->resp_count)){
1121 /* both request buffer and response buffer
1122 fit into one sbale each */
1123 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1124 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1125 sbale[2].length = ct->req[0].length;
1126 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1127 sbale[3].length = ct->resp[0].length;
1128 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1129 } else if (adapter->adapter_features &
1130 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1131 /* try to use chained SBALs */
1132 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1133 SBAL_FLAGS0_TYPE_WRITE_READ,
1135 ZFCP_MAX_SBALS_PER_CT_REQ);
1144 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1145 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1146 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1147 SBAL_FLAGS0_TYPE_WRITE_READ,
1149 ZFCP_MAX_SBALS_PER_CT_REQ);
1158 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1160 /* reject send generic request */
1165 /* settings in QTCB */
1166 fsf_req->qtcb->header.port_handle = port->handle;
1167 fsf_req->qtcb->bottom.support.service_class =
1168 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1169 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1170 fsf_req->data = (unsigned long) ct;
1172 zfcp_san_dbf_event_ct_request(fsf_req);
1175 erp_action->fsf_req = fsf_req;
1176 fsf_req->erp_action = erp_action;
1177 zfcp_erp_start_timer(fsf_req);
1179 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1181 ret = zfcp_fsf_req_send(fsf_req);
1188 zfcp_fsf_req_free(fsf_req);
1189 if (erp_action != NULL) {
1190 erp_action->fsf_req = NULL;
1194 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1199 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1200 * @fsf_req: pointer to struct zfcp_fsf_req
1202 * Data specific for the Generic Service request is passed using
1203 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1204 * Usually a specific handler for the CT request is called which is
1205 * found in this structure.
1208 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1210 struct zfcp_port *port;
1211 struct zfcp_adapter *adapter;
1212 struct zfcp_send_ct *send_ct;
1213 struct fsf_qtcb_header *header;
1214 struct fsf_qtcb_bottom_support *bottom;
1215 int retval = -EINVAL;
1217 adapter = fsf_req->adapter;
1218 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1219 port = send_ct->port;
1220 header = &fsf_req->qtcb->header;
1221 bottom = &fsf_req->qtcb->bottom.support;
1223 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1224 goto skip_fsfstatus;
1226 /* evaluate FSF status in QTCB */
1227 switch (header->fsf_status) {
1230 zfcp_san_dbf_event_ct_response(fsf_req);
1234 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1235 zfcp_fsf_class_not_supp(fsf_req);
1238 case FSF_ADAPTER_STATUS_AVAILABLE:
1239 switch (header->fsf_status_qual.word[0]){
1240 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1241 /* reopening link to port */
1242 zfcp_test_link(port);
1243 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1245 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1246 /* ERP strategy will escalate */
1247 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1252 case FSF_ACCESS_DENIED:
1253 zfcp_fsf_access_denied_port(fsf_req, port);
1256 case FSF_GENERIC_COMMAND_REJECTED:
1257 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1260 case FSF_PORT_HANDLE_NOT_VALID:
1261 zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
1262 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1265 case FSF_PORT_BOXED:
1266 zfcp_erp_port_boxed(port, 49, fsf_req);
1267 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1268 | ZFCP_STATUS_FSFREQ_RETRY;
1271 /* following states should never occure, all cases avoided
1272 in zfcp_fsf_send_ct - but who knows ... */
1273 case FSF_PAYLOAD_SIZE_MISMATCH:
1274 case FSF_REQUEST_SIZE_TOO_LARGE:
1275 case FSF_RESPONSE_SIZE_TOO_LARGE:
1276 case FSF_SBAL_MISMATCH:
1277 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1285 send_ct->status = retval;
1287 if (send_ct->handler != NULL)
1288 send_ct->handler(send_ct->handler_data);
1294 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1295 * @els: pointer to struct zfcp_send_els which contains all needed data for
1299 zfcp_fsf_send_els(struct zfcp_send_els *els)
1301 volatile struct qdio_buffer_element *sbale;
1302 struct zfcp_fsf_req *fsf_req;
1304 struct zfcp_adapter *adapter;
1305 unsigned long lock_flags;
1310 adapter = els->adapter;
1312 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1313 ZFCP_REQ_AUTO_CLEANUP,
1314 NULL, &lock_flags, &fsf_req);
1318 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1319 &els->port->status))) {
1324 sbale = zfcp_qdio_sbale_req(fsf_req);
1325 if (zfcp_use_one_sbal(els->req, els->req_count,
1326 els->resp, els->resp_count)){
1327 /* both request buffer and response buffer
1328 fit into one sbale each */
1329 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1330 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1331 sbale[2].length = els->req[0].length;
1332 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1333 sbale[3].length = els->resp[0].length;
1334 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1335 } else if (adapter->adapter_features &
1336 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1337 /* try to use chained SBALs */
1338 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1339 SBAL_FLAGS0_TYPE_WRITE_READ,
1341 ZFCP_MAX_SBALS_PER_ELS_REQ);
1350 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1351 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1352 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1353 SBAL_FLAGS0_TYPE_WRITE_READ,
1355 ZFCP_MAX_SBALS_PER_ELS_REQ);
1364 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1366 /* reject request */
1371 /* settings in QTCB */
1372 fsf_req->qtcb->bottom.support.d_id = d_id;
1373 fsf_req->qtcb->bottom.support.service_class =
1374 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1375 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1376 fsf_req->data = (unsigned long) els;
1378 sbale = zfcp_qdio_sbale_req(fsf_req);
1380 zfcp_san_dbf_event_els_request(fsf_req);
1382 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1383 ret = zfcp_fsf_req_send(fsf_req);
1391 zfcp_fsf_req_free(fsf_req);
1395 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1401 * zfcp_fsf_send_els_handler - handler for ELS commands
1402 * @fsf_req: pointer to struct zfcp_fsf_req
1404 * Data specific for the ELS command is passed using
1405 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1406 * Usually a specific handler for the ELS command is called which is
1407 * found in this structure.
1409 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1411 struct zfcp_adapter *adapter;
1412 struct zfcp_port *port;
1414 struct fsf_qtcb_header *header;
1415 struct fsf_qtcb_bottom_support *bottom;
1416 struct zfcp_send_els *send_els;
1417 int retval = -EINVAL;
1419 send_els = (struct zfcp_send_els *) fsf_req->data;
1420 adapter = send_els->adapter;
1421 port = send_els->port;
1422 d_id = send_els->d_id;
1423 header = &fsf_req->qtcb->header;
1424 bottom = &fsf_req->qtcb->bottom.support;
1426 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1427 goto skip_fsfstatus;
1429 switch (header->fsf_status) {
1432 zfcp_san_dbf_event_els_response(fsf_req);
1436 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1437 zfcp_fsf_class_not_supp(fsf_req);
1440 case FSF_ADAPTER_STATUS_AVAILABLE:
1441 switch (header->fsf_status_qual.word[0]){
1442 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1443 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1444 zfcp_test_link(port);
1445 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1447 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1448 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1450 case FSF_SQ_RETRY_IF_POSSIBLE:
1451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1456 case FSF_ELS_COMMAND_REJECTED:
1457 case FSF_PAYLOAD_SIZE_MISMATCH:
1458 case FSF_REQUEST_SIZE_TOO_LARGE:
1459 case FSF_RESPONSE_SIZE_TOO_LARGE:
1462 case FSF_SBAL_MISMATCH:
1463 /* should never occure, avoided in zfcp_fsf_send_els */
1464 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1467 case FSF_ACCESS_DENIED:
1468 zfcp_fsf_access_denied_port(fsf_req, port);
1472 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1477 send_els->status = retval;
1479 if (send_els->handler)
1480 send_els->handler(send_els->handler_data);
1486 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1488 volatile struct qdio_buffer_element *sbale;
1489 struct zfcp_fsf_req *fsf_req;
1490 struct zfcp_adapter *adapter = erp_action->adapter;
1491 unsigned long lock_flags;
1494 /* setup new FSF request */
1495 retval = zfcp_fsf_req_create(adapter,
1496 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1497 ZFCP_REQ_AUTO_CLEANUP,
1498 adapter->pool.fsf_req_erp,
1499 &lock_flags, &fsf_req);
1501 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1505 sbale = zfcp_qdio_sbale_req(fsf_req);
1506 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1507 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1509 fsf_req->qtcb->bottom.config.feature_selection =
1511 FSF_FEATURE_LUN_SHARING |
1512 FSF_FEATURE_NOTIFICATION_LOST |
1513 FSF_FEATURE_UPDATE_ALERT;
1514 fsf_req->erp_action = erp_action;
1515 erp_action->fsf_req = fsf_req;
1517 zfcp_erp_start_timer(fsf_req);
1518 retval = zfcp_fsf_req_send(fsf_req);
1519 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1521 zfcp_fsf_req_free(fsf_req);
1522 erp_action->fsf_req = NULL;
1529 zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1530 struct fsf_qtcb_bottom_config *data)
1532 volatile struct qdio_buffer_element *sbale;
1533 struct zfcp_fsf_req *fsf_req;
1534 unsigned long lock_flags;
1537 /* setup new FSF request */
1538 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1539 ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
1542 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1546 sbale = zfcp_qdio_sbale_req(fsf_req);
1547 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1548 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1550 fsf_req->qtcb->bottom.config.feature_selection =
1552 FSF_FEATURE_LUN_SHARING |
1553 FSF_FEATURE_NOTIFICATION_LOST |
1554 FSF_FEATURE_UPDATE_ALERT;
1557 fsf_req->data = (unsigned long) data;
1559 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1560 retval = zfcp_fsf_req_send(fsf_req);
1561 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1563 wait_event(fsf_req->completion_wq,
1564 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1566 zfcp_fsf_req_free(fsf_req);
1572 * zfcp_fsf_exchange_config_evaluate
1573 * @fsf_req: fsf_req which belongs to xchg config data request
1574 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1576 * returns: -EIO on error, 0 otherwise
1579 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1581 struct fsf_qtcb_bottom_config *bottom;
1582 struct zfcp_adapter *adapter = fsf_req->adapter;
1583 struct Scsi_Host *shost = adapter->scsi_host;
1585 bottom = &fsf_req->qtcb->bottom.config;
1586 adapter->fsf_lic_version = bottom->lic_version;
1587 adapter->adapter_features = bottom->adapter_features;
1588 adapter->connection_features = bottom->connection_features;
1589 adapter->peer_wwpn = 0;
1590 adapter->peer_wwnn = 0;
1591 adapter->peer_d_id = 0;
1596 memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
1597 bottom, sizeof (struct fsf_qtcb_bottom_config));
1599 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
1600 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
1601 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
1602 fc_host_speed(shost) = bottom->fc_link_speed;
1603 fc_host_supported_classes(shost) =
1604 FC_COS_CLASS2 | FC_COS_CLASS3;
1605 adapter->hydra_version = bottom->adapter_type;
1606 adapter->timer_ticks = bottom->timer_interval;
1607 if (fc_host_permanent_port_name(shost) == -1)
1608 fc_host_permanent_port_name(shost) =
1609 fc_host_port_name(shost);
1610 if (bottom->fc_topology == FSF_TOPO_P2P) {
1611 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
1612 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
1613 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
1614 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
1615 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
1616 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
1617 else if (bottom->fc_topology == FSF_TOPO_AL)
1618 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
1620 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1622 fc_host_node_name(shost) = 0;
1623 fc_host_port_name(shost) = 0;
1624 fc_host_port_id(shost) = 0;
1625 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1626 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1627 adapter->hydra_version = 0;
1630 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
1631 adapter->hardware_version = bottom->hardware_version;
1632 memcpy(fc_host_serial_number(shost), bottom->serial_number,
1633 min(FC_SERIAL_NUMBER_SIZE, 17));
1634 EBCASC(fc_host_serial_number(shost),
1635 min(FC_SERIAL_NUMBER_SIZE, 17));
1638 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
1639 dev_err(&adapter->ccw_device->dev,
1640 "The adapter only supports newer control block "
1641 "versions, try updated device driver.\n");
1642 zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
1645 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
1646 dev_err(&adapter->ccw_device->dev,
1647 "The adapter only supports older control block "
1648 "versions, consider a microcode upgrade.\n");
1649 zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
1656 * function: zfcp_fsf_exchange_config_data_handler
1658 * purpose: is called for finished Exchange Configuration Data command
1663 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
1665 struct fsf_qtcb_bottom_config *bottom;
1666 struct zfcp_adapter *adapter = fsf_req->adapter;
1667 struct fsf_qtcb *qtcb = fsf_req->qtcb;
1669 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1672 switch (qtcb->header.fsf_status) {
1675 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
1678 switch (fc_host_port_type(adapter->scsi_host)) {
1679 case FC_PORTTYPE_PTP:
1680 if (fsf_req->erp_action)
1681 dev_info(&adapter->ccw_device->dev,
1682 "Point-to-Point fibrechannel "
1683 "configuration detected.\n");
1685 case FC_PORTTYPE_NLPORT:
1686 dev_err(&adapter->ccw_device->dev,
1687 "Unsupported arbitrated loop fibrechannel "
1688 "topology detected, shutting down adapter\n");
1689 zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
1691 case FC_PORTTYPE_NPORT:
1692 if (fsf_req->erp_action)
1693 dev_info(&adapter->ccw_device->dev,
1694 "Switched fabric fibrechannel "
1695 "network detected.\n");
1698 dev_err(&adapter->ccw_device->dev,
1699 "The fibrechannel topology reported by the "
1700 "adapter is not known by the zfcp driver, "
1701 "shutting down adapter.\n");
1702 zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
1705 bottom = &qtcb->bottom.config;
1706 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
1707 dev_err(&adapter->ccw_device->dev,
1708 "Maximum QTCB size (%d bytes) allowed by "
1709 "the adapter is lower than the minimum "
1710 "required by the driver (%ld bytes).\n",
1711 bottom->max_qtcb_size, sizeof(struct fsf_qtcb));
1712 zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
1715 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
1718 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
1719 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
1722 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
1725 zfcp_fsf_link_down_info_eval(fsf_req, 42,
1726 &qtcb->header.fsf_status_qual.link_down_info);
1729 zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
1736 * zfcp_fsf_exchange_port_data - request information about local port
1737 * @erp_action: ERP action for the adapter for which port data is requested
1740 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1742 volatile struct qdio_buffer_element *sbale;
1743 struct zfcp_fsf_req *fsf_req;
1744 struct zfcp_adapter *adapter = erp_action->adapter;
1745 unsigned long lock_flags;
1748 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1751 /* setup new FSF request */
1752 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1753 ZFCP_REQ_AUTO_CLEANUP,
1754 adapter->pool.fsf_req_erp,
1755 &lock_flags, &fsf_req);
1757 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1761 sbale = zfcp_qdio_sbale_req(fsf_req);
1762 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1763 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1765 erp_action->fsf_req = fsf_req;
1766 fsf_req->erp_action = erp_action;
1767 zfcp_erp_start_timer(fsf_req);
1769 retval = zfcp_fsf_req_send(fsf_req);
1770 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1773 zfcp_fsf_req_free(fsf_req);
1774 erp_action->fsf_req = NULL;
1781 * zfcp_fsf_exchange_port_data_sync - request information about local port
1782 * and wait until information is ready
1785 zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1786 struct fsf_qtcb_bottom_port *data)
1788 volatile struct qdio_buffer_element *sbale;
1789 struct zfcp_fsf_req *fsf_req;
1790 unsigned long lock_flags;
1793 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1796 /* setup new FSF request */
1797 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1798 0, NULL, &lock_flags, &fsf_req);
1800 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1805 fsf_req->data = (unsigned long) data;
1807 sbale = zfcp_qdio_sbale_req(fsf_req);
1808 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1809 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1811 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1812 retval = zfcp_fsf_req_send(fsf_req);
1813 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1816 wait_event(fsf_req->completion_wq,
1817 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1819 zfcp_fsf_req_free(fsf_req);
1825 * zfcp_fsf_exchange_port_evaluate
1826 * @fsf_req: fsf_req which belongs to xchg port data request
1827 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
1830 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1832 struct zfcp_adapter *adapter;
1833 struct fsf_qtcb_bottom_port *bottom;
1834 struct Scsi_Host *shost;
1836 adapter = fsf_req->adapter;
1837 bottom = &fsf_req->qtcb->bottom.port;
1838 shost = adapter->scsi_host;
1841 memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
1842 sizeof(struct fsf_qtcb_bottom_port));
1844 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
1845 fc_host_permanent_port_name(shost) = bottom->wwpn;
1847 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
1848 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
1849 fc_host_supported_speeds(shost) = bottom->supported_speed;
1853 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
1854 * @fsf_req: pointer to struct zfcp_fsf_req
1857 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
1859 struct zfcp_adapter *adapter;
1860 struct fsf_qtcb *qtcb;
1862 adapter = fsf_req->adapter;
1863 qtcb = fsf_req->qtcb;
1865 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1868 switch (qtcb->header.fsf_status) {
1870 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
1871 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
1873 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
1874 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
1875 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
1876 zfcp_fsf_link_down_info_eval(fsf_req, 43,
1877 &qtcb->header.fsf_status_qual.link_down_info);
1884 * function: zfcp_fsf_open_port
1888 * returns: address of initiated FSF request
1889 * NULL - request could not be initiated
1892 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1894 volatile struct qdio_buffer_element *sbale;
1895 struct zfcp_fsf_req *fsf_req;
1896 unsigned long lock_flags;
1899 /* setup new FSF request */
1900 retval = zfcp_fsf_req_create(erp_action->adapter,
1901 FSF_QTCB_OPEN_PORT_WITH_DID,
1902 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1903 erp_action->adapter->pool.fsf_req_erp,
1904 &lock_flags, &fsf_req);
1908 sbale = zfcp_qdio_sbale_req(fsf_req);
1909 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1910 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1912 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1913 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
1914 fsf_req->data = (unsigned long) erp_action->port;
1915 fsf_req->erp_action = erp_action;
1916 erp_action->fsf_req = fsf_req;
1918 zfcp_erp_start_timer(fsf_req);
1919 retval = zfcp_fsf_req_send(fsf_req);
1921 zfcp_fsf_req_free(fsf_req);
1922 erp_action->fsf_req = NULL;
1927 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1932 * function: zfcp_fsf_open_port_handler
1934 * purpose: is called for finished Open Port command
1939 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
1941 int retval = -EINVAL;
1942 struct zfcp_port *port;
1943 struct fsf_plogi *plogi;
1944 struct fsf_qtcb_header *header;
1946 port = (struct zfcp_port *) fsf_req->data;
1947 header = &fsf_req->qtcb->header;
1949 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1950 /* don't change port status in our bookkeeping */
1951 goto skip_fsfstatus;
1954 /* evaluate FSF status in QTCB */
1955 switch (header->fsf_status) {
1957 case FSF_PORT_ALREADY_OPEN:
1959 * This is a bug, however operation should continue normally
1960 * if it is simply ignored
1964 case FSF_ACCESS_DENIED:
1965 zfcp_fsf_access_denied_port(fsf_req, port);
1968 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1969 dev_warn(&fsf_req->adapter->ccw_device->dev,
1970 "The adapter is out of resources. The remote port "
1971 "0x%016Lx could not be opened, disabling it.\n",
1973 zfcp_erp_port_failed(port, 31, fsf_req);
1974 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1977 case FSF_ADAPTER_STATUS_AVAILABLE:
1978 switch (header->fsf_status_qual.word[0]) {
1979 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1980 /* ERP strategy will escalate */
1981 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1984 /* ERP strategy will escalate */
1985 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1987 case FSF_SQ_NO_RETRY_POSSIBLE:
1988 dev_warn(&fsf_req->adapter->ccw_device->dev,
1989 "The remote port 0x%016Lx could not be "
1990 "opened. Disabling it.\n", port->wwpn);
1991 zfcp_erp_port_failed(port, 32, fsf_req);
1992 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2000 /* save port handle assigned by FSF */
2001 port->handle = header->port_handle;
2002 /* mark port as open */
2003 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2004 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2005 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2006 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2009 /* check whether D_ID has changed during open */
2011 * FIXME: This check is not airtight, as the FCP channel does
2012 * not monitor closures of target port connections caused on
2013 * the remote side. Thus, they might miss out on invalidating
2014 * locally cached WWPNs (and other N_Port parameters) of gone
2015 * target ports. So, our heroic attempt to make things safe
2016 * could be undermined by 'open port' response data tagged with
2017 * obsolete WWPNs. Another reason to monitor potential
2018 * connection closures ourself at least (by interpreting
2019 * incoming ELS' and unsolicited status). It just crosses my
2020 * mind that one should be able to cross-check by means of
2021 * another GID_PN straight after a port has been opened.
2022 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2024 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2025 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2027 if (fsf_req->qtcb->bottom.support.els1_length <
2028 sizeof (struct fsf_plogi)) {
2029 /* skip sanity check and assume wwpn is ok */
2031 if (plogi->serv_param.wwpn != port->wwpn) {
2033 ZFCP_STATUS_PORT_DID_DID,
2036 port->wwnn = plogi->serv_param.wwnn;
2037 zfcp_fc_plogi_evaluate(port, plogi);
2043 case FSF_UNKNOWN_OP_SUBTYPE:
2044 /* should never occure, subtype not set in zfcp_fsf_open_port */
2045 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2053 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2058 * function: zfcp_fsf_close_port
2060 * purpose: submit FSF command "close port"
2062 * returns: address of initiated FSF request
2063 * NULL - request could not be initiated
2066 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2068 volatile struct qdio_buffer_element *sbale;
2069 struct zfcp_fsf_req *fsf_req;
2070 unsigned long lock_flags;
2073 /* setup new FSF request */
2074 retval = zfcp_fsf_req_create(erp_action->adapter,
2075 FSF_QTCB_CLOSE_PORT,
2076 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2077 erp_action->adapter->pool.fsf_req_erp,
2078 &lock_flags, &fsf_req);
2082 sbale = zfcp_qdio_sbale_req(fsf_req);
2083 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2084 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2086 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2087 fsf_req->data = (unsigned long) erp_action->port;
2088 fsf_req->erp_action = erp_action;
2089 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2090 fsf_req->erp_action = erp_action;
2091 erp_action->fsf_req = fsf_req;
2093 zfcp_erp_start_timer(fsf_req);
2094 retval = zfcp_fsf_req_send(fsf_req);
2096 zfcp_fsf_req_free(fsf_req);
2097 erp_action->fsf_req = NULL;
2102 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
2107 * function: zfcp_fsf_close_port_handler
2109 * purpose: is called for finished Close Port FSF command
2114 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2116 int retval = -EINVAL;
2117 struct zfcp_port *port;
2119 port = (struct zfcp_port *) fsf_req->data;
2121 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2122 /* don't change port status in our bookkeeping */
2123 goto skip_fsfstatus;
2126 /* evaluate FSF status in QTCB */
2127 switch (fsf_req->qtcb->header.fsf_status) {
2129 case FSF_PORT_HANDLE_NOT_VALID:
2130 zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
2131 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2134 case FSF_ADAPTER_STATUS_AVAILABLE:
2135 /* Note: FSF has actually closed the port in this case.
2136 * The status code is just daft. Fingers crossed for a change
2142 zfcp_erp_modify_port_status(port, 33, fsf_req,
2143 ZFCP_STATUS_COMMON_OPEN,
2150 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2155 * function: zfcp_fsf_close_physical_port
2157 * purpose: submit FSF command "close physical port"
2159 * returns: address of initiated FSF request
2160 * NULL - request could not be initiated
2163 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2165 volatile struct qdio_buffer_element *sbale;
2166 struct zfcp_fsf_req *fsf_req;
2167 unsigned long lock_flags;
2170 /* setup new FSF request */
2171 retval = zfcp_fsf_req_create(erp_action->adapter,
2172 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2173 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2174 erp_action->adapter->pool.fsf_req_erp,
2175 &lock_flags, &fsf_req);
2179 sbale = zfcp_qdio_sbale_req(fsf_req);
2180 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2181 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2183 /* mark port as being closed */
2184 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2185 &erp_action->port->status);
2186 /* save a pointer to this port */
2187 fsf_req->data = (unsigned long) erp_action->port;
2188 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2189 fsf_req->erp_action = erp_action;
2190 erp_action->fsf_req = fsf_req;
2192 zfcp_erp_start_timer(fsf_req);
2193 retval = zfcp_fsf_req_send(fsf_req);
2195 zfcp_fsf_req_free(fsf_req);
2196 erp_action->fsf_req = NULL;
2201 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
2206 * function: zfcp_fsf_close_physical_port_handler
2208 * purpose: is called for finished Close Physical Port FSF command
2213 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2215 int retval = -EINVAL;
2216 struct zfcp_port *port;
2217 struct zfcp_unit *unit;
2218 struct fsf_qtcb_header *header;
2220 port = (struct zfcp_port *) fsf_req->data;
2221 header = &fsf_req->qtcb->header;
2223 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2224 /* don't change port status in our bookkeeping */
2225 goto skip_fsfstatus;
2228 /* evaluate FSF status in QTCB */
2229 switch (header->fsf_status) {
2231 case FSF_PORT_HANDLE_NOT_VALID:
2232 zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
2233 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2236 case FSF_ACCESS_DENIED:
2237 zfcp_fsf_access_denied_port(fsf_req, port);
2240 case FSF_PORT_BOXED:
2241 zfcp_erp_port_boxed(port, 50, fsf_req);
2242 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2243 ZFCP_STATUS_FSFREQ_RETRY;
2245 /* can't use generic zfcp_erp_modify_port_status because
2246 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2247 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2248 list_for_each_entry(unit, &port->unit_list_head, list)
2249 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
2253 case FSF_ADAPTER_STATUS_AVAILABLE:
2254 switch (header->fsf_status_qual.word[0]) {
2255 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2256 /* This will now be escalated by ERP */
2257 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2259 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2260 /* ERP strategy will escalate */
2261 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2267 /* can't use generic zfcp_erp_modify_port_status because
2268 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2270 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2271 list_for_each_entry(unit, &port->unit_list_head, list)
2272 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2278 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2283 * function: zfcp_fsf_open_unit
2289 * assumptions: This routine does not check whether the associated
2290 * remote port has already been opened. This should be
2291 * done by calling routines. Otherwise some status
2292 * may be presented by FSF
2295 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2297 volatile struct qdio_buffer_element *sbale;
2298 struct zfcp_fsf_req *fsf_req;
2299 unsigned long lock_flags;
2302 /* setup new FSF request */
2303 retval = zfcp_fsf_req_create(erp_action->adapter,
2305 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2306 erp_action->adapter->pool.fsf_req_erp,
2307 &lock_flags, &fsf_req);
2311 sbale = zfcp_qdio_sbale_req(fsf_req);
2312 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2313 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2315 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2316 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
2317 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2318 fsf_req->qtcb->bottom.support.option =
2319 FSF_OPEN_LUN_SUPPRESS_BOXING;
2320 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2321 fsf_req->data = (unsigned long) erp_action->unit;
2322 fsf_req->erp_action = erp_action;
2323 erp_action->fsf_req = fsf_req;
2325 zfcp_erp_start_timer(fsf_req);
2326 retval = zfcp_fsf_req_send(erp_action->fsf_req);
2328 zfcp_fsf_req_free(fsf_req);
2329 erp_action->fsf_req = NULL;
2333 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
2338 * function: zfcp_fsf_open_unit_handler
2340 * purpose: is called for finished Open LUN command
2345 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2347 int retval = -EINVAL;
2348 struct zfcp_adapter *adapter;
2349 struct zfcp_unit *unit;
2350 struct fsf_qtcb_header *header;
2351 struct fsf_qtcb_bottom_support *bottom;
2352 struct fsf_queue_designator *queue_designator;
2353 int exclusive, readwrite;
2355 unit = (struct zfcp_unit *) fsf_req->data;
2357 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2358 /* don't change unit status in our bookkeeping */
2359 goto skip_fsfstatus;
2362 adapter = fsf_req->adapter;
2363 header = &fsf_req->qtcb->header;
2364 bottom = &fsf_req->qtcb->bottom.support;
2365 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2367 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2368 ZFCP_STATUS_COMMON_ACCESS_BOXED |
2369 ZFCP_STATUS_UNIT_SHARED |
2370 ZFCP_STATUS_UNIT_READONLY,
2373 /* evaluate FSF status in QTCB */
2374 switch (header->fsf_status) {
2376 case FSF_PORT_HANDLE_NOT_VALID:
2377 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
2378 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2381 case FSF_LUN_ALREADY_OPEN:
2382 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2385 case FSF_ACCESS_DENIED:
2386 zfcp_fsf_access_denied_unit(fsf_req, unit);
2387 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
2388 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
2391 case FSF_PORT_BOXED:
2392 zfcp_erp_port_boxed(unit->port, 51, fsf_req);
2393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2394 ZFCP_STATUS_FSFREQ_RETRY;
2397 case FSF_LUN_SHARING_VIOLATION:
2398 if (header->fsf_status_qual.word[0] != 0) {
2399 dev_warn(&adapter->ccw_device->dev,
2400 "FCP-LUN 0x%Lx at the remote port "
2402 "connected to the adapter "
2403 "is already in use in LPAR%d, CSS%d.\n",
2406 queue_designator->hla,
2407 queue_designator->cssid);
2409 zfcp_act_eval_err(adapter,
2410 header->fsf_status_qual.word[2]);
2411 zfcp_erp_unit_access_denied(unit, 60, fsf_req);
2412 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
2413 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
2414 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2417 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
2418 dev_warn(&fsf_req->adapter->ccw_device->dev,
2419 "The adapter ran out of resources. There is no "
2420 "handle available for unit 0x%016Lx on port 0x%016Lx.",
2421 unit->fcp_lun, unit->port->wwpn);
2422 zfcp_erp_unit_failed(unit, 34, fsf_req);
2423 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2426 case FSF_ADAPTER_STATUS_AVAILABLE:
2427 switch (header->fsf_status_qual.word[0]) {
2428 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2429 /* Re-establish link to port */
2430 zfcp_test_link(unit->port);
2431 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2433 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2434 /* ERP strategy will escalate */
2435 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2440 case FSF_INVALID_COMMAND_OPTION:
2441 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2446 /* save LUN handle assigned by FSF */
2447 unit->handle = header->lun_handle;
2448 /* mark unit as open */
2449 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2451 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
2452 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
2453 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
2454 exclusive = (bottom->lun_access_info &
2455 FSF_UNIT_ACCESS_EXCLUSIVE);
2456 readwrite = (bottom->lun_access_info &
2457 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
2460 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
2464 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
2466 dev_info(&fsf_req->adapter->ccw_device->dev,
2467 "Read-only access for unit 0x%016Lx "
2468 "on port 0x%016Lx.\n",
2469 unit->fcp_lun, unit->port->wwpn);
2472 if (exclusive && !readwrite) {
2473 dev_err(&fsf_req->adapter->ccw_device->dev,
2474 "Exclusive access of read-only unit "
2475 "0x%016Lx on port 0x%016Lx not "
2476 "supported, disabling unit.\n",
2477 unit->fcp_lun, unit->port->wwpn);
2478 zfcp_erp_unit_failed(unit, 35, fsf_req);
2479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2480 zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
2481 } else if (!exclusive && readwrite) {
2482 dev_err(&fsf_req->adapter->ccw_device->dev,
2483 "Shared access of read-write unit "
2484 "0x%016Lx on port 0x%016Lx not "
2485 "supported, disabling unit.\n",
2486 unit->fcp_lun, unit->port->wwpn);
2487 zfcp_erp_unit_failed(unit, 36, fsf_req);
2488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2489 zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
2498 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
2503 * function: zfcp_fsf_close_unit
2507 * returns: address of fsf_req - request successfully initiated
2510 * assumptions: This routine does not check whether the associated
2511 * remote port/lun has already been opened. This should be
2512 * done by calling routines. Otherwise some status
2513 * may be presented by FSF
2516 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2518 volatile struct qdio_buffer_element *sbale;
2519 struct zfcp_fsf_req *fsf_req;
2520 unsigned long lock_flags;
2523 /* setup new FSF request */
2524 retval = zfcp_fsf_req_create(erp_action->adapter,
2526 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2527 erp_action->adapter->pool.fsf_req_erp,
2528 &lock_flags, &fsf_req);
2532 sbale = zfcp_qdio_sbale_req(fsf_req);
2533 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2534 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2536 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2537 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
2538 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
2539 fsf_req->data = (unsigned long) erp_action->unit;
2540 fsf_req->erp_action = erp_action;
2541 erp_action->fsf_req = fsf_req;
2543 zfcp_erp_start_timer(fsf_req);
2544 retval = zfcp_fsf_req_send(erp_action->fsf_req);
2546 zfcp_fsf_req_free(fsf_req);
2547 erp_action->fsf_req = NULL;
2552 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
2557 * function: zfcp_fsf_close_unit_handler
2559 * purpose: is called for finished Close LUN FSF command
2564 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
2566 int retval = -EINVAL;
2567 struct zfcp_unit *unit;
2569 unit = (struct zfcp_unit *) fsf_req->data;
2571 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2572 /* don't change unit status in our bookkeeping */
2573 goto skip_fsfstatus;
2576 /* evaluate FSF status in QTCB */
2577 switch (fsf_req->qtcb->header.fsf_status) {
2579 case FSF_PORT_HANDLE_NOT_VALID:
2580 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
2581 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2584 case FSF_LUN_HANDLE_NOT_VALID:
2585 zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
2586 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2589 case FSF_PORT_BOXED:
2590 zfcp_erp_port_boxed(unit->port, 52, fsf_req);
2591 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2592 ZFCP_STATUS_FSFREQ_RETRY;
2595 case FSF_ADAPTER_STATUS_AVAILABLE:
2596 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
2597 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2598 /* re-establish link to port */
2599 zfcp_test_link(unit->port);
2600 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2602 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2603 /* ERP strategy will escalate */
2604 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2612 /* mark unit as closed */
2613 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2619 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
2624 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2625 * @adapter: adapter where scsi command is issued
2626 * @unit: unit where command is sent to
2627 * @scsi_cmnd: scsi command to be sent
2628 * @timer: timer to be started when request is initiated
2629 * @req_flags: flags for fsf_request
2632 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2633 struct zfcp_unit *unit,
2634 struct scsi_cmnd * scsi_cmnd,
2635 int use_timer, int req_flags)
2637 struct zfcp_fsf_req *fsf_req = NULL;
2638 struct fcp_cmnd_iu *fcp_cmnd_iu;
2639 unsigned int sbtype;
2640 unsigned long lock_flags;
2645 /* setup new FSF request */
2646 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2647 adapter->pool.fsf_req_scsi,
2648 &lock_flags, &fsf_req);
2649 if (unlikely(retval < 0))
2650 goto failed_req_create;
2652 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
2658 zfcp_unit_get(unit);
2659 fsf_req->unit = unit;
2661 /* associate FSF request with SCSI request (for look up on abort) */
2662 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
2664 /* associate SCSI command with FSF request */
2665 fsf_req->data = (unsigned long) scsi_cmnd;
2667 /* set handles of unit and its parent port in QTCB */
2668 fsf_req->qtcb->header.lun_handle = unit->handle;
2669 fsf_req->qtcb->header.port_handle = unit->port->handle;
2671 /* FSF does not define the structure of the FCP_CMND IU */
2672 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
2673 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
2676 * set depending on data direction:
2677 * data direction bits in SBALE (SB Type)
2678 * data direction bits in QTCB
2679 * data direction bits in FCP_CMND IU
2681 switch (scsi_cmnd->sc_data_direction) {
2683 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2686 * what is the correct type for commands
2687 * without 'real' data buffers?
2689 sbtype = SBAL_FLAGS0_TYPE_READ;
2691 case DMA_FROM_DEVICE:
2692 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2693 sbtype = SBAL_FLAGS0_TYPE_READ;
2694 fcp_cmnd_iu->rddata = 1;
2697 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2698 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2699 fcp_cmnd_iu->wddata = 1;
2701 case DMA_BIDIRECTIONAL:
2704 * dummy, catch this condition earlier
2705 * in zfcp_scsi_queuecommand
2707 goto failed_scsi_cmnd;
2710 /* set FC service class in QTCB (3 per default) */
2711 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
2713 /* set FCP_LUN in FCP_CMND IU in QTCB */
2714 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2716 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
2718 /* set task attributes in FCP_CMND IU in QTCB */
2719 if (likely((scsi_cmnd->device->simple_tags) ||
2720 (atomic_test_mask(mask, &unit->status))))
2721 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2723 fcp_cmnd_iu->task_attribute = UNTAGGED;
2725 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
2726 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2727 fcp_cmnd_iu->add_fcp_cdb_length
2728 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2730 * copy SCSI CDB (including additional length, if any) to
2731 * FCP_CDB in FCP_CMND IU in QTCB
2733 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2735 /* FCP CMND IU length in QTCB */
2736 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
2737 sizeof (struct fcp_cmnd_iu) +
2738 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
2740 /* generate SBALEs from data buffer */
2741 real_bytes = zfcp_qdio_sbals_from_sg(fsf_req, sbtype,
2742 scsi_sglist(scsi_cmnd),
2743 ZFCP_MAX_SBALS_PER_REQ);
2744 if (unlikely(real_bytes < 0)) {
2745 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ)
2748 dev_err(&adapter->ccw_device->dev,
2749 "SCSI request too large. "
2750 "Shutting down unit 0x%016Lx on port "
2751 "0x%016Lx.\n", unit->fcp_lun,
2753 zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
2759 /* set length of FCP data length in FCP_CMND IU in QTCB */
2760 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2763 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2765 retval = zfcp_fsf_req_send(fsf_req);
2766 if (unlikely(retval < 0))
2774 zfcp_unit_put(unit);
2776 zfcp_fsf_req_free(fsf_req);
2778 scsi_cmnd->host_scribble = NULL;
2781 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
2785 struct zfcp_fsf_req *
2786 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
2787 struct zfcp_unit *unit,
2788 u8 tm_flags, int req_flags)
2790 struct zfcp_fsf_req *fsf_req = NULL;
2792 struct fcp_cmnd_iu *fcp_cmnd_iu;
2793 unsigned long lock_flags;
2794 volatile struct qdio_buffer_element *sbale;
2796 /* setup new FSF request */
2797 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2798 adapter->pool.fsf_req_scsi,
2799 &lock_flags, &fsf_req);
2803 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
2808 * Used to decide on proper handler in the return path,
2809 * could be either zfcp_fsf_send_fcp_command_task_handler or
2810 * zfcp_fsf_send_fcp_command_task_management_handler */
2812 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2815 * hold a pointer to the unit being target of this
2816 * task management request
2818 fsf_req->data = (unsigned long) unit;
2820 /* set FSF related fields in QTCB */
2821 fsf_req->qtcb->header.lun_handle = unit->handle;
2822 fsf_req->qtcb->header.port_handle = unit->port->handle;
2823 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2824 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
2825 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
2826 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
2828 sbale = zfcp_qdio_sbale_req(fsf_req);
2829 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2830 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2832 /* set FCP related fields in FCP_CMND IU in QTCB */
2833 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
2834 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
2835 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2836 fcp_cmnd_iu->task_management_flags = tm_flags;
2838 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
2839 retval = zfcp_fsf_req_send(fsf_req);
2844 zfcp_fsf_req_free(fsf_req);
2848 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
2852 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2854 lat_rec->sum += lat;
2855 if (lat_rec->min > lat)
2857 if (lat_rec->max < lat)
2861 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
2863 struct fsf_qual_latency_info *lat_inf;
2864 struct latency_cont *lat;
2865 struct zfcp_unit *unit;
2866 unsigned long flags;
2868 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2869 unit = fsf_req->unit;
2871 switch (fsf_req->qtcb->bottom.io.data_direction) {
2872 case FSF_DATADIR_READ:
2873 lat = &unit->latencies.read;
2875 case FSF_DATADIR_WRITE:
2876 lat = &unit->latencies.write;
2878 case FSF_DATADIR_CMND:
2879 lat = &unit->latencies.cmd;
2885 spin_lock_irqsave(&unit->latencies.lock, flags);
2886 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2887 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2889 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2893 * function: zfcp_fsf_send_fcp_command_handler
2895 * purpose: is called for finished Send FCP Command
2900 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
2902 int retval = -EINVAL;
2903 struct zfcp_unit *unit;
2904 struct fsf_qtcb_header *header;
2906 header = &fsf_req->qtcb->header;
2908 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2909 unit = (struct zfcp_unit *) fsf_req->data;
2911 unit = fsf_req->unit;
2913 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2914 /* go directly to calls of special handlers */
2915 goto skip_fsfstatus;
2918 /* evaluate FSF status in QTCB */
2919 switch (header->fsf_status) {
2921 case FSF_PORT_HANDLE_NOT_VALID:
2922 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
2923 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2926 case FSF_LUN_HANDLE_NOT_VALID:
2927 zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
2928 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2931 case FSF_HANDLE_MISMATCH:
2932 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
2933 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2936 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2937 zfcp_fsf_class_not_supp(fsf_req);
2940 case FSF_FCPLUN_NOT_VALID:
2941 zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
2942 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2945 case FSF_ACCESS_DENIED:
2946 zfcp_fsf_access_denied_unit(fsf_req, unit);
2949 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2950 dev_err(&fsf_req->adapter->ccw_device->dev,
2951 "Invalid data direction (%d) given for unit 0x%016Lx "
2952 "on port 0x%016Lx, shutting down adapter.\n",
2953 fsf_req->qtcb->bottom.io.data_direction,
2954 unit->fcp_lun, unit->port->wwpn);
2955 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
2956 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2959 case FSF_CMND_LENGTH_NOT_VALID:
2960 dev_err(&fsf_req->adapter->ccw_device->dev,
2961 "An invalid control-data-block length field (%d) "
2962 "was found in a command for unit 0x%016Lx on port "
2963 "0x%016Lx. Shutting down adapter.\n",
2964 fsf_req->qtcb->bottom.io.fcp_cmnd_length,
2965 unit->fcp_lun, unit->port->wwpn);
2966 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
2967 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2970 case FSF_PORT_BOXED:
2971 zfcp_erp_port_boxed(unit->port, 53, fsf_req);
2972 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2973 ZFCP_STATUS_FSFREQ_RETRY;
2977 zfcp_erp_unit_boxed(unit, 54, fsf_req);
2978 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
2979 | ZFCP_STATUS_FSFREQ_RETRY;
2982 case FSF_ADAPTER_STATUS_AVAILABLE:
2983 switch (header->fsf_status_qual.word[0]) {
2984 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2985 /* re-establish link to port */
2986 zfcp_test_link(unit->port);
2988 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2989 /* FIXME(hw) need proper specs for proper action */
2990 /* let scsi stack deal with retries and escalation */
2993 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2999 case FSF_FCP_RSP_AVAILABLE:
3004 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3006 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3008 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
3009 fsf_req->unit = NULL;
3010 zfcp_unit_put(unit);
3016 * function: zfcp_fsf_send_fcp_command_task_handler
3018 * purpose: evaluates FCP_RSP IU
3023 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3026 struct scsi_cmnd *scpnt;
3027 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3028 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3030 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
3031 unsigned long flags;
3033 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
3034 scpnt = (struct scsi_cmnd *) fsf_req->data;
3035 if (unlikely(!scpnt))
3038 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3039 /* FIXME: (design) mid-layer should handle DID_ABORT like
3040 * DID_SOFT_ERROR by retrying the request for devices
3041 * that allow retries.
3043 set_host_byte(scpnt, DID_SOFT_ERROR);
3044 set_driver_byte(scpnt, SUGGEST_RETRY);
3045 goto skip_fsfstatus;
3048 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3049 set_host_byte(scpnt, DID_ERROR);
3050 goto skip_fsfstatus;
3053 /* set message byte of result in SCSI command */
3054 set_msg_byte(scpnt, COMMAND_COMPLETE);
3057 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
3058 * of result in SCSI command
3060 scpnt->result |= fcp_rsp_iu->scsi_status;
3062 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
3063 zfcp_fsf_req_latency(fsf_req);
3065 /* check FCP_RSP_INFO */
3066 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
3067 switch (fcp_rsp_info[3]) {
3070 set_host_byte(scpnt, DID_OK);
3072 case RSP_CODE_LENGTH_MISMATCH:
3074 set_host_byte(scpnt, DID_ERROR);
3075 goto skip_fsfstatus;
3076 case RSP_CODE_FIELD_INVALID:
3077 /* driver or hardware bug */
3078 set_host_byte(scpnt, DID_ERROR);
3079 goto skip_fsfstatus;
3080 case RSP_CODE_RO_MISMATCH:
3082 set_host_byte(scpnt, DID_ERROR);
3083 goto skip_fsfstatus;
3085 /* invalid FCP response code */
3086 set_host_byte(scpnt, DID_ERROR);
3087 goto skip_fsfstatus;
3091 /* check for sense data */
3092 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
3093 sns_len = FSF_FCP_RSP_SIZE -
3094 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
3095 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
3096 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
3098 memcpy(scpnt->sense_buffer,
3099 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
3102 /* check for underrun */
3103 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
3104 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
3105 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
3107 set_host_byte(scpnt, DID_ERROR);
3111 if (scpnt->result != 0)
3112 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
3113 else if (scpnt->retries > 0)
3114 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
3116 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
3118 /* cleanup pointer (need this especially for abort) */
3119 scpnt->host_scribble = NULL;
3121 /* always call back */
3122 (scpnt->scsi_done) (scpnt);
3125 * We must hold this lock until scsi_done has been called.
3126 * Otherwise we may call scsi_done after abort regarding this
3127 * command has completed.
3128 * Note: scsi_done must not block!
3131 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
3136 * function: zfcp_fsf_send_fcp_command_task_management_handler
3138 * purpose: evaluates FCP_RSP IU
3143 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
3146 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3147 &(fsf_req->qtcb->bottom.io.fcp_rsp);
3148 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
3150 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3151 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3152 goto skip_fsfstatus;
3155 /* check FCP_RSP_INFO */
3156 switch (fcp_rsp_info[3]) {
3160 case RSP_CODE_TASKMAN_UNSUPP:
3161 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
3163 case RSP_CODE_TASKMAN_FAILED:
3164 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3167 /* invalid FCP response code */
3168 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3177 * function: zfcp_fsf_control_file
3179 * purpose: Initiator of the control file upload/download FSF requests
3181 * returns: 0 - FSF request is successfuly created and queued
3182 * -EOPNOTSUPP - The FCP adapter does not have Control File support
3183 * -EINVAL - Invalid direction specified
3184 * -ENOMEM - Insufficient memory
3185 * -EPERM - Cannot create FSF request or place it in QDIO queue
3187 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
3188 struct zfcp_fsf_cfdc *fsf_cfdc)
3190 struct zfcp_fsf_req *fsf_req;
3191 struct fsf_qtcb_bottom_support *bottom;
3192 volatile struct qdio_buffer_element *sbale;
3193 unsigned long lock_flags;
3198 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
3199 return ERR_PTR(-EOPNOTSUPP);
3201 switch (fsf_cfdc->command) {
3202 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
3203 direction = SBAL_FLAGS0_TYPE_WRITE;
3205 case FSF_QTCB_UPLOAD_CONTROL_FILE:
3206 direction = SBAL_FLAGS0_TYPE_READ;
3209 return ERR_PTR(-EINVAL);
3212 retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
3214 NULL, &lock_flags, &fsf_req);
3217 goto unlock_queue_lock;
3220 sbale = zfcp_qdio_sbale_req(fsf_req);
3221 sbale[0].flags |= direction;
3223 bottom = &fsf_req->qtcb->bottom.support;
3224 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
3225 bottom->option = fsf_cfdc->option;
3227 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
3229 ZFCP_MAX_SBALS_PER_REQ);
3230 if (bytes != ZFCP_CFDC_MAX_SIZE) {
3235 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3236 retval = zfcp_fsf_req_send(fsf_req);
3241 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
3243 wait_event(fsf_req->completion_wq,
3244 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
3249 zfcp_fsf_req_free(fsf_req);
3251 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
3252 return ERR_PTR(retval);
3255 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
3257 if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
3258 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3262 zfcp_fsf_req_sbal_check(unsigned long *flags,
3263 struct zfcp_qdio_queue *queue, int needed)
3265 write_lock_irqsave(&queue->lock, *flags);
3266 if (likely(atomic_read(&queue->count) >= needed))
3268 write_unlock_irqrestore(&queue->lock, *flags);
3273 * set qtcb pointer in fsf_req and initialize QTCB
3276 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
3278 if (likely(fsf_req->qtcb != NULL)) {
3279 fsf_req->qtcb->prefix.req_seq_no =
3280 fsf_req->adapter->fsf_req_seq_no;
3281 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
3282 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
3283 fsf_req->qtcb->prefix.qtcb_type =
3284 fsf_qtcb_type[fsf_req->fsf_command];
3285 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
3286 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
3287 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
3292 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
3293 * @adapter: adapter for which request queue is examined
3294 * @req_flags: flags indicating whether to wait for needed SBAL or not
3295 * @lock_flags: lock_flags if queue_lock is taken
3296 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
3297 * Locks: lock adapter->req_q->lock on success
3300 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
3301 unsigned long *lock_flags)
3304 struct zfcp_qdio_queue *req_q = &adapter->req_q;
3306 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
3307 ret = wait_event_interruptible_timeout(adapter->request_wq,
3308 zfcp_fsf_req_sbal_check(lock_flags, req_q, 1),
3314 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 1))
3321 * function: zfcp_fsf_req_create
3323 * purpose: create an FSF request at the specified adapter and
3324 * setup common fields
3326 * returns: -ENOMEM if there was insufficient memory for a request
3327 * -EIO if no qdio buffers could be allocate to the request
3328 * -EINVAL/-EPERM on bug conditions in req_dequeue
3331 * note: The created request is returned by reference.
3333 * locks: lock of concerned request queue must not be held,
3334 * but is held on completion (write, irqsave)
3337 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
3338 mempool_t *pool, unsigned long *lock_flags,
3339 struct zfcp_fsf_req **fsf_req_p)
3341 volatile struct qdio_buffer_element *sbale;
3342 struct zfcp_fsf_req *fsf_req = NULL;
3344 struct zfcp_qdio_queue *req_q = &adapter->req_q;
3346 /* allocate new FSF request */
3347 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
3348 if (unlikely(!fsf_req)) {
3350 goto failed_fsf_req;
3353 fsf_req->adapter = adapter;
3354 fsf_req->fsf_command = fsf_cmd;
3355 INIT_LIST_HEAD(&fsf_req->list);
3356 init_timer(&fsf_req->timer);
3358 /* initialize waitqueue which may be used to wait on
3359 this request completion */
3360 init_waitqueue_head(&fsf_req->completion_wq);
3362 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
3366 /* this is serialized (we are holding req_queue-lock of adapter) */
3367 if (adapter->req_no == 0)
3369 fsf_req->req_id = adapter->req_no++;
3371 zfcp_fsf_req_qtcb_init(fsf_req);
3374 * We hold queue_lock here. Check if QDIOUP is set and let request fail
3375 * if it is not set (see also *_open_qdio and *_close_qdio).
3378 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
3379 write_unlock_irqrestore(&req_q->lock, *lock_flags);
3384 if (fsf_req->qtcb) {
3385 fsf_req->seq_no = adapter->fsf_req_seq_no;
3386 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
3388 fsf_req->sbal_number = 1;
3389 fsf_req->sbal_first = req_q->first;
3390 fsf_req->sbal_last = req_q->first;
3391 fsf_req->sbale_curr = 1;
3393 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
3394 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
3397 sbale = zfcp_qdio_sbale_req(fsf_req);
3399 /* setup common SBALE fields */
3400 sbale[0].addr = (void *) fsf_req->req_id;
3401 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
3402 if (likely(fsf_req->qtcb != NULL)) {
3403 sbale[1].addr = (void *) fsf_req->qtcb;
3404 sbale[1].length = sizeof(struct fsf_qtcb);
3410 /* dequeue new FSF request previously enqueued */
3411 zfcp_fsf_req_free(fsf_req);
3415 write_lock_irqsave(&req_q->lock, *lock_flags);
3417 *fsf_req_p = fsf_req;
3422 * function: zfcp_fsf_req_send
3424 * purpose: start transfer of FSF request via QDIO
3426 * returns: 0 - request transfer succesfully started
3427 * !0 - start of request transfer failed
3429 static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
3431 struct zfcp_adapter *adapter;
3432 struct zfcp_qdio_queue *req_q;
3433 volatile struct qdio_buffer_element *sbale;
3437 adapter = fsf_req->adapter;
3438 req_q = &adapter->req_q;
3440 sbale = zfcp_qdio_sbale_req(fsf_req);
3442 /* put allocated FSF request into hash table */
3443 spin_lock(&adapter->req_list_lock);
3444 zfcp_reqlist_add(adapter, fsf_req);
3445 spin_unlock(&adapter->req_list_lock);
3447 inc_seq_no = (fsf_req->qtcb != NULL);
3449 fsf_req->issued = get_clock();
3451 retval = zfcp_qdio_send(fsf_req);
3453 if (unlikely(retval)) {
3454 /* Queues are down..... */
3455 del_timer(&fsf_req->timer);
3456 spin_lock(&adapter->req_list_lock);
3457 zfcp_reqlist_remove(adapter, fsf_req);
3458 spin_unlock(&adapter->req_list_lock);
3459 /* undo changes in request queue made for this request */
3460 atomic_add(fsf_req->sbal_number, &req_q->count);
3461 req_q->first -= fsf_req->sbal_number;
3462 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
3463 req_q->first %= QDIO_MAX_BUFFERS_PER_Q;
3464 zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
3468 * increase FSF sequence counter -
3469 * this must only be done for request successfully enqueued to
3470 * QDIO this rejected requests may be cleaned up by calling
3471 * routines resulting in missing sequence counter values
3475 /* Don't increase for unsolicited status */
3477 adapter->fsf_req_seq_no++;