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[SCSI] zfcp: attach and release SAN nameserver port on demand
[linux-2.6/mini2440.git] / drivers / s390 / scsi / zfcp_fsf.c
blob23dd9088153f90d29ffdb7b23d226f7ab6a52a09
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2008
7 */
8
9 #include "zfcp_ext.h"
10
11 static void zfcp_fsf_request_timeout_handler(unsigned long data)
12 {
13 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
14 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
15 NULL);
16 }
17
18 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
19 unsigned long timeout)
20 {
21 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
22 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
23 fsf_req->timer.expires = jiffies + timeout;
24 add_timer(&fsf_req->timer);
25 }
26
27 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
28 {
29 BUG_ON(!fsf_req->erp_action);
30 fsf_req->timer.function = zfcp_erp_timeout_handler;
31 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
32 fsf_req->timer.expires = jiffies + 30 * HZ;
33 add_timer(&fsf_req->timer);
34 }
35
36 /* association between FSF command and FSF QTCB type */
37 static u32 fsf_qtcb_type[] = {
38 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
39 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
40 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
41 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
42 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
43 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
48 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
49 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
51 };
52
53 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
54 {
55 u16 subtable = table >> 16;
56 u16 rule = table & 0xffff;
57 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
58
59 if (subtable && subtable < ARRAY_SIZE(act_type))
60 dev_warn(&adapter->ccw_device->dev,
61 "Access denied according to ACT rule type %s, "
62 "rule %d\n", act_type[subtable], rule);
63 }
64
65 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
66 struct zfcp_port *port)
67 {
68 struct fsf_qtcb_header *header = &req->qtcb->header;
69 dev_warn(&req->adapter->ccw_device->dev,
70 "Access denied to port 0x%016Lx\n",
71 port->wwpn);
72 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
73 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
74 zfcp_erp_port_access_denied(port, 55, req);
75 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
76 }
77
78 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
79 struct zfcp_unit *unit)
80 {
81 struct fsf_qtcb_header *header = &req->qtcb->header;
82 dev_warn(&req->adapter->ccw_device->dev,
83 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
84 unit->fcp_lun, unit->port->wwpn);
85 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
86 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
87 zfcp_erp_unit_access_denied(unit, 59, req);
88 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
89 }
90
91 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
92 {
93 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
94 "operational because of an unsupported FC class\n");
95 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97 }
98
99 /**
100 * zfcp_fsf_req_free - free memory used by fsf request
101 * @fsf_req: pointer to struct zfcp_fsf_req
102 */
103 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
104 {
105 if (likely(req->pool)) {
106 mempool_free(req, req->pool);
107 return;
108 }
109
110 if (req->qtcb) {
111 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
112 return;
113 }
114 }
115
116 /**
117 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
118 * @adapter: pointer to struct zfcp_adapter
119 *
120 * Never ever call this without shutting down the adapter first.
121 * Otherwise the adapter would continue using and corrupting s390 storage.
122 * Included BUG_ON() call to ensure this is done.
123 * ERP is supposed to be the only user of this function.
124 */
125 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
126 {
127 struct zfcp_fsf_req *req, *tmp;
128 unsigned long flags;
129 LIST_HEAD(remove_queue);
130 unsigned int i;
131
132 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
133 spin_lock_irqsave(&adapter->req_list_lock, flags);
134 for (i = 0; i < REQUEST_LIST_SIZE; i++)
135 list_splice_init(&adapter->req_list[i], &remove_queue);
136 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
137
138 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
139 list_del(&req->list);
140 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
141 zfcp_fsf_req_complete(req);
142 }
143 }
144
145 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
146 {
147 struct fsf_status_read_buffer *sr_buf = req->data;
148 struct zfcp_adapter *adapter = req->adapter;
149 struct zfcp_port *port;
150 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
151 unsigned long flags;
152
153 read_lock_irqsave(&zfcp_data.config_lock, flags);
154 list_for_each_entry(port, &adapter->port_list_head, list)
155 if (port->d_id == d_id) {
156 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
157 switch (sr_buf->status_subtype) {
158 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
159 zfcp_erp_port_reopen(port, 0, 101, req);
160 break;
161 case FSF_STATUS_READ_SUB_ERROR_PORT:
162 zfcp_erp_port_shutdown(port, 0, 122, req);
163 break;
164 }
165 return;
166 }
167 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
168 }
169
170 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
171 struct fsf_link_down_info *link_down)
172 {
173 struct zfcp_adapter *adapter = req->adapter;
174
175 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
176 return;
177
178 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
179
180 if (!link_down)
181 goto out;
182
183 switch (link_down->error_code) {
184 case FSF_PSQ_LINK_NO_LIGHT:
185 dev_warn(&req->adapter->ccw_device->dev,
186 "There is no light signal from the local "
187 "fibre channel cable\n");
188 break;
189 case FSF_PSQ_LINK_WRAP_PLUG:
190 dev_warn(&req->adapter->ccw_device->dev,
191 "There is a wrap plug instead of a fibre "
192 "channel cable\n");
193 break;
194 case FSF_PSQ_LINK_NO_FCP:
195 dev_warn(&req->adapter->ccw_device->dev,
196 "The adjacent fibre channel node does not "
197 "support FCP\n");
198 break;
199 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
200 dev_warn(&req->adapter->ccw_device->dev,
201 "The FCP device is suspended because of a "
202 "firmware update\n");
203 break;
204 case FSF_PSQ_LINK_INVALID_WWPN:
205 dev_warn(&req->adapter->ccw_device->dev,
206 "The FCP device detected a WWPN that is "
207 "duplicate or not valid\n");
208 break;
209 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
210 dev_warn(&req->adapter->ccw_device->dev,
211 "The fibre channel fabric does not support NPIV\n");
212 break;
213 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
214 dev_warn(&req->adapter->ccw_device->dev,
215 "The FCP adapter cannot support more NPIV ports\n");
216 break;
217 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
218 dev_warn(&req->adapter->ccw_device->dev,
219 "The adjacent switch cannot support "
220 "more NPIV ports\n");
221 break;
222 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
223 dev_warn(&req->adapter->ccw_device->dev,
224 "The FCP adapter could not log in to the "
225 "fibre channel fabric\n");
226 break;
227 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
228 dev_warn(&req->adapter->ccw_device->dev,
229 "The WWPN assignment file on the FCP adapter "
230 "has been damaged\n");
231 break;
232 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
233 dev_warn(&req->adapter->ccw_device->dev,
234 "The mode table on the FCP adapter "
235 "has been damaged\n");
236 break;
237 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
238 dev_warn(&req->adapter->ccw_device->dev,
239 "All NPIV ports on the FCP adapter have "
240 "been assigned\n");
241 break;
242 default:
243 dev_warn(&req->adapter->ccw_device->dev,
244 "The link between the FCP adapter and "
245 "the FC fabric is down\n");
246 }
247 out:
248 zfcp_erp_adapter_failed(adapter, id, req);
249 }
250
251 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
252 {
253 struct fsf_status_read_buffer *sr_buf = req->data;
254 struct fsf_link_down_info *ldi =
255 (struct fsf_link_down_info *) &sr_buf->payload;
256
257 switch (sr_buf->status_subtype) {
258 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
259 zfcp_fsf_link_down_info_eval(req, 38, ldi);
260 break;
261 case FSF_STATUS_READ_SUB_FDISC_FAILED:
262 zfcp_fsf_link_down_info_eval(req, 39, ldi);
263 break;
264 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
265 zfcp_fsf_link_down_info_eval(req, 40, NULL);
266 };
267 }
268
269 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
270 {
271 struct zfcp_adapter *adapter = req->adapter;
272 struct fsf_status_read_buffer *sr_buf = req->data;
273
274 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
275 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
276 mempool_free(sr_buf, adapter->pool.data_status_read);
277 zfcp_fsf_req_free(req);
278 return;
279 }
280
281 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
282
283 switch (sr_buf->status_type) {
284 case FSF_STATUS_READ_PORT_CLOSED:
285 zfcp_fsf_status_read_port_closed(req);
286 break;
287 case FSF_STATUS_READ_INCOMING_ELS:
288 zfcp_fc_incoming_els(req);
289 break;
290 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
291 break;
292 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
293 dev_warn(&adapter->ccw_device->dev,
294 "The error threshold for checksum statistics "
295 "has been exceeded\n");
296 break;
297 case FSF_STATUS_READ_LINK_DOWN:
298 zfcp_fsf_status_read_link_down(req);
299 break;
300 case FSF_STATUS_READ_LINK_UP:
301 dev_info(&adapter->ccw_device->dev,
302 "The local link has been restored\n");
303 /* All ports should be marked as ready to run again */
304 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
305 ZFCP_STATUS_COMMON_RUNNING,
306 ZFCP_SET);
307 zfcp_erp_adapter_reopen(adapter,
308 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
309 ZFCP_STATUS_COMMON_ERP_FAILED,
310 102, req);
311 break;
312 case FSF_STATUS_READ_NOTIFICATION_LOST:
313 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
314 zfcp_erp_adapter_access_changed(adapter, 135, req);
315 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
316 schedule_work(&adapter->scan_work);
317 break;
318 case FSF_STATUS_READ_CFDC_UPDATED:
319 zfcp_erp_adapter_access_changed(adapter, 136, req);
320 break;
321 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
322 adapter->adapter_features = sr_buf->payload.word[0];
323 break;
324 }
325
326 mempool_free(sr_buf, adapter->pool.data_status_read);
327 zfcp_fsf_req_free(req);
328
329 atomic_inc(&adapter->stat_miss);
330 schedule_work(&adapter->stat_work);
331 }
332
333 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
334 {
335 switch (req->qtcb->header.fsf_status_qual.word[0]) {
336 case FSF_SQ_FCP_RSP_AVAILABLE:
337 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
338 case FSF_SQ_NO_RETRY_POSSIBLE:
339 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
340 return;
341 case FSF_SQ_COMMAND_ABORTED:
342 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
343 break;
344 case FSF_SQ_NO_RECOM:
345 dev_err(&req->adapter->ccw_device->dev,
346 "The FCP adapter reported a problem "
347 "that cannot be recovered\n");
348 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
349 break;
350 }
351 /* all non-return stats set FSFREQ_ERROR*/
352 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
353 }
354
355 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
356 {
357 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
358 return;
359
360 switch (req->qtcb->header.fsf_status) {
361 case FSF_UNKNOWN_COMMAND:
362 dev_err(&req->adapter->ccw_device->dev,
363 "The FCP adapter does not recognize the command 0x%x\n",
364 req->qtcb->header.fsf_command);
365 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
366 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
367 break;
368 case FSF_ADAPTER_STATUS_AVAILABLE:
369 zfcp_fsf_fsfstatus_qual_eval(req);
370 break;
371 }
372 }
373
374 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
375 {
376 struct zfcp_adapter *adapter = req->adapter;
377 struct fsf_qtcb *qtcb = req->qtcb;
378 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
379
380 zfcp_hba_dbf_event_fsf_response(req);
381
382 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
383 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
384 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
385 return;
386 }
387
388 switch (qtcb->prefix.prot_status) {
389 case FSF_PROT_GOOD:
390 case FSF_PROT_FSF_STATUS_PRESENTED:
391 return;
392 case FSF_PROT_QTCB_VERSION_ERROR:
393 dev_err(&adapter->ccw_device->dev,
394 "QTCB version 0x%x not supported by FCP adapter "
395 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
396 psq->word[0], psq->word[1]);
397 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
398 break;
399 case FSF_PROT_ERROR_STATE:
400 case FSF_PROT_SEQ_NUMB_ERROR:
401 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
402 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
403 break;
404 case FSF_PROT_UNSUPP_QTCB_TYPE:
405 dev_err(&adapter->ccw_device->dev,
406 "The QTCB type is not supported by the FCP adapter\n");
407 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
408 break;
409 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
410 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
411 &adapter->status);
412 break;
413 case FSF_PROT_DUPLICATE_REQUEST_ID:
414 dev_err(&adapter->ccw_device->dev,
415 "0x%Lx is an ambiguous request identifier\n",
416 (unsigned long long)qtcb->bottom.support.req_handle);
417 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
418 break;
419 case FSF_PROT_LINK_DOWN:
420 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
421 /* FIXME: reopening adapter now? better wait for link up */
422 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
423 break;
424 case FSF_PROT_REEST_QUEUE:
425 /* All ports should be marked as ready to run again */
426 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
427 ZFCP_STATUS_COMMON_RUNNING,
428 ZFCP_SET);
429 zfcp_erp_adapter_reopen(adapter,
430 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
431 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
432 break;
433 default:
434 dev_err(&adapter->ccw_device->dev,
435 "0x%x is not a valid transfer protocol status\n",
436 qtcb->prefix.prot_status);
437 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
438 }
439 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
440 }
441
442 /**
443 * zfcp_fsf_req_complete - process completion of a FSF request
444 * @fsf_req: The FSF request that has been completed.
445 *
446 * When a request has been completed either from the FCP adapter,
447 * or it has been dismissed due to a queue shutdown, this function
448 * is called to process the completion status and trigger further
449 * events related to the FSF request.
450 */
451 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
452 {
453 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
454 zfcp_fsf_status_read_handler(req);
455 return;
456 }
457
458 del_timer(&req->timer);
459 zfcp_fsf_protstatus_eval(req);
460 zfcp_fsf_fsfstatus_eval(req);
461 req->handler(req);
462
463 if (req->erp_action)
464 zfcp_erp_notify(req->erp_action, 0);
465 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
466
467 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
468 zfcp_fsf_req_free(req);
469 else
470 /* notify initiator waiting for the requests completion */
471 /*
472 * FIXME: Race! We must not access fsf_req here as it might have been
473 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
474 * flag. It's an improbable case. But, we have the same paranoia for
475 * the cleanup flag already.
476 * Might better be handled using complete()?
477 * (setting the flag and doing wakeup ought to be atomic
478 * with regard to checking the flag as long as waitqueue is
479 * part of the to be released structure)
480 */
481 wake_up(&req->completion_wq);
482 }
483
484 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
485 {
486 struct fsf_qtcb_bottom_config *bottom;
487 struct zfcp_adapter *adapter = req->adapter;
488 struct Scsi_Host *shost = adapter->scsi_host;
489
490 bottom = &req->qtcb->bottom.config;
491
492 if (req->data)
493 memcpy(req->data, bottom, sizeof(*bottom));
494
495 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
496 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
497 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
498 fc_host_speed(shost) = bottom->fc_link_speed;
499 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
500
501 adapter->hydra_version = bottom->adapter_type;
502 adapter->timer_ticks = bottom->timer_interval;
503
504 if (fc_host_permanent_port_name(shost) == -1)
505 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
506
507 switch (bottom->fc_topology) {
508 case FSF_TOPO_P2P:
509 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
510 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
511 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
512 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
513 break;
514 case FSF_TOPO_FABRIC:
515 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
516 break;
517 case FSF_TOPO_AL:
518 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
519 default:
520 dev_err(&adapter->ccw_device->dev,
521 "Unknown or unsupported arbitrated loop "
522 "fibre channel topology detected\n");
523 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
524 return -EIO;
525 }
526
527 return 0;
528 }
529
530 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
531 {
532 struct zfcp_adapter *adapter = req->adapter;
533 struct fsf_qtcb *qtcb = req->qtcb;
534 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
535 struct Scsi_Host *shost = adapter->scsi_host;
536
537 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
538 return;
539
540 adapter->fsf_lic_version = bottom->lic_version;
541 adapter->adapter_features = bottom->adapter_features;
542 adapter->connection_features = bottom->connection_features;
543 adapter->peer_wwpn = 0;
544 adapter->peer_wwnn = 0;
545 adapter->peer_d_id = 0;
546
547 switch (qtcb->header.fsf_status) {
548 case FSF_GOOD:
549 if (zfcp_fsf_exchange_config_evaluate(req))
550 return;
551
552 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
553 dev_err(&adapter->ccw_device->dev,
554 "FCP adapter maximum QTCB size (%d bytes) "
555 "is too small\n",
556 bottom->max_qtcb_size);
557 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
558 return;
559 }
560 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
561 &adapter->status);
562 break;
563 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
564 fc_host_node_name(shost) = 0;
565 fc_host_port_name(shost) = 0;
566 fc_host_port_id(shost) = 0;
567 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
568 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
569 adapter->hydra_version = 0;
570
571 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
572 &adapter->status);
573
574 zfcp_fsf_link_down_info_eval(req, 42,
575 &qtcb->header.fsf_status_qual.link_down_info);
576 break;
577 default:
578 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
579 return;
580 }
581
582 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
583 adapter->hardware_version = bottom->hardware_version;
584 memcpy(fc_host_serial_number(shost), bottom->serial_number,
585 min(FC_SERIAL_NUMBER_SIZE, 17));
586 EBCASC(fc_host_serial_number(shost),
587 min(FC_SERIAL_NUMBER_SIZE, 17));
588 }
589
590 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
591 dev_err(&adapter->ccw_device->dev,
592 "The FCP adapter only supports newer "
593 "control block versions\n");
594 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
595 return;
596 }
597 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
598 dev_err(&adapter->ccw_device->dev,
599 "The FCP adapter only supports older "
600 "control block versions\n");
601 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
602 }
603 }
604
605 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
606 {
607 struct zfcp_adapter *adapter = req->adapter;
608 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
609 struct Scsi_Host *shost = adapter->scsi_host;
610
611 if (req->data)
612 memcpy(req->data, bottom, sizeof(*bottom));
613
614 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
615 fc_host_permanent_port_name(shost) = bottom->wwpn;
616 else
617 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
618 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
619 fc_host_supported_speeds(shost) = bottom->supported_speed;
620 }
621
622 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
623 {
624 struct fsf_qtcb *qtcb = req->qtcb;
625
626 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
627 return;
628
629 switch (qtcb->header.fsf_status) {
630 case FSF_GOOD:
631 zfcp_fsf_exchange_port_evaluate(req);
632 break;
633 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
634 zfcp_fsf_exchange_port_evaluate(req);
635 zfcp_fsf_link_down_info_eval(req, 43,
636 &qtcb->header.fsf_status_qual.link_down_info);
637 break;
638 }
639 }
640
641 static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
642 {
643 spin_lock_bh(&queue->lock);
644 if (atomic_read(&queue->count))
645 return 1;
646 spin_unlock_bh(&queue->lock);
647 return 0;
648 }
649
650 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
651 {
652 unsigned int count = atomic_read(&adapter->req_q.count);
653 if (!count)
654 atomic_inc(&adapter->qdio_outb_full);
655 return count > 0;
656 }
657
658 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
659 {
660 long ret;
661 struct zfcp_qdio_queue *req_q = &adapter->req_q;
662
663 spin_unlock_bh(&req_q->lock);
664 ret = wait_event_interruptible_timeout(adapter->request_wq,
665 zfcp_fsf_sbal_check(req_q), 5 * HZ);
666 if (ret > 0)
667 return 0;
668 if (!ret)
669 atomic_inc(&adapter->qdio_outb_full);
670
671 spin_lock_bh(&req_q->lock);
672 return -EIO;
673 }
674
675 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
676 {
677 struct zfcp_fsf_req *req;
678 req = mempool_alloc(pool, GFP_ATOMIC);
679 if (!req)
680 return NULL;
681 memset(req, 0, sizeof(*req));
682 return req;
683 }
684
685 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
686 {
687 struct zfcp_fsf_req_qtcb *qtcb;
688
689 if (likely(pool))
690 qtcb = mempool_alloc(pool, GFP_ATOMIC);
691 else
692 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
693 GFP_ATOMIC);
694 if (unlikely(!qtcb))
695 return NULL;
696
697 memset(qtcb, 0, sizeof(*qtcb));
698 qtcb->fsf_req.qtcb = &qtcb->qtcb;
699 qtcb->fsf_req.pool = pool;
700
701 return &qtcb->fsf_req;
702 }
703
704 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
705 u32 fsf_cmd, int req_flags,
706 mempool_t *pool)
707 {
708 struct qdio_buffer_element *sbale;
709
710 struct zfcp_fsf_req *req;
711 struct zfcp_qdio_queue *req_q = &adapter->req_q;
712
713 if (req_flags & ZFCP_REQ_NO_QTCB)
714 req = zfcp_fsf_alloc_noqtcb(pool);
715 else
716 req = zfcp_fsf_alloc_qtcb(pool);
717
718 if (unlikely(!req))
719 return ERR_PTR(-EIO);
720
721 if (adapter->req_no == 0)
722 adapter->req_no++;
723
724 INIT_LIST_HEAD(&req->list);
725 init_timer(&req->timer);
726 init_waitqueue_head(&req->completion_wq);
727
728 req->adapter = adapter;
729 req->fsf_command = fsf_cmd;
730 req->req_id = adapter->req_no++;
731 req->sbal_number = 1;
732 req->sbal_first = req_q->first;
733 req->sbal_last = req_q->first;
734 req->sbale_curr = 1;
735
736 sbale = zfcp_qdio_sbale_req(req);
737 sbale[0].addr = (void *) req->req_id;
738 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
739
740 if (likely(req->qtcb)) {
741 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
742 req->qtcb->prefix.req_id = req->req_id;
743 req->qtcb->prefix.ulp_info = 26;
744 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
745 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
746 req->qtcb->header.req_handle = req->req_id;
747 req->qtcb->header.fsf_command = req->fsf_command;
748 req->seq_no = adapter->fsf_req_seq_no;
749 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
750 sbale[1].addr = (void *) req->qtcb;
751 sbale[1].length = sizeof(struct fsf_qtcb);
752 }
753
754 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
755 zfcp_fsf_req_free(req);
756 return ERR_PTR(-EIO);
757 }
758
759 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
760 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
761
762 return req;
763 }
764
765 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
766 {
767 struct zfcp_adapter *adapter = req->adapter;
768 struct zfcp_qdio_queue *req_q = &adapter->req_q;
769 int idx;
770
771 /* put allocated FSF request into hash table */
772 spin_lock(&adapter->req_list_lock);
773 idx = zfcp_reqlist_hash(req->req_id);
774 list_add_tail(&req->list, &adapter->req_list[idx]);
775 spin_unlock(&adapter->req_list_lock);
776
777 req->issued = get_clock();
778 if (zfcp_qdio_send(req)) {
779 /* Queues are down..... */
780 del_timer(&req->timer);
781 spin_lock(&adapter->req_list_lock);
782 zfcp_reqlist_remove(adapter, req);
783 spin_unlock(&adapter->req_list_lock);
784 /* undo changes in request queue made for this request */
785 atomic_add(req->sbal_number, &req_q->count);
786 req_q->first -= req->sbal_number;
787 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
788 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
789 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
790 return -EIO;
791 }
792
793 /* Don't increase for unsolicited status */
794 if (req->qtcb)
795 adapter->fsf_req_seq_no++;
796
797 return 0;
798 }
799
800 /**
801 * zfcp_fsf_status_read - send status read request
802 * @adapter: pointer to struct zfcp_adapter
803 * @req_flags: request flags
804 * Returns: 0 on success, ERROR otherwise
805 */
806 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
807 {
808 struct zfcp_fsf_req *req;
809 struct fsf_status_read_buffer *sr_buf;
810 struct qdio_buffer_element *sbale;
811 int retval = -EIO;
812
813 spin_lock_bh(&adapter->req_q.lock);
814 if (zfcp_fsf_req_sbal_get(adapter))
815 goto out;
816
817 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
818 ZFCP_REQ_NO_QTCB,
819 adapter->pool.fsf_req_status_read);
820 if (IS_ERR(req)) {
821 retval = PTR_ERR(req);
822 goto out;
823 }
824
825 sbale = zfcp_qdio_sbale_req(req);
826 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
840
841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
844
845 goto out;
846
847 failed_req_send:
848 mempool_free(sr_buf, adapter->pool.data_status_read);
849 failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
852 out:
853 spin_unlock_bh(&adapter->req_q.lock);
854 return retval;
855 }
856
857 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858 {
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
866 case FSF_PORT_HANDLE_NOT_VALID:
867 if (fsq->word[0] == fsq->word[1]) {
868 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
869 req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
871 }
872 break;
873 case FSF_LUN_HANDLE_NOT_VALID:
874 if (fsq->word[0] == fsq->word[1]) {
875 zfcp_erp_port_reopen(unit->port, 0, 105, req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
877 }
878 break;
879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
881 break;
882 case FSF_PORT_BOXED:
883 zfcp_erp_port_boxed(unit->port, 47, req);
884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
886 break;
887 case FSF_LUN_BOXED:
888 zfcp_erp_unit_boxed(unit, 48, req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_ADAPTER_STATUS_AVAILABLE:
893 switch (fsq->word[0]) {
894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
895 zfcp_test_link(unit->port);
896 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
898 break;
899 }
900 break;
901 case FSF_GOOD:
902 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
903 break;
904 }
905 }
906
907 /**
908 * zfcp_fsf_abort_fcp_command - abort running SCSI command
909 * @old_req_id: unsigned long
910 * @adapter: pointer to struct zfcp_adapter
911 * @unit: pointer to struct zfcp_unit
912 * @req_flags: integer specifying the request flags
913 * Returns: pointer to struct zfcp_fsf_req
914 *
915 * FIXME(design): should be watched by a timeout !!!
916 */
917
918 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
919 struct zfcp_adapter *adapter,
920 struct zfcp_unit *unit,
921 int req_flags)
922 {
923 struct qdio_buffer_element *sbale;
924 struct zfcp_fsf_req *req = NULL;
925
926 spin_lock(&adapter->req_q.lock);
927 if (!zfcp_fsf_sbal_available(adapter))
928 goto out;
929 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
930 req_flags, adapter->pool.fsf_req_abort);
931 if (IS_ERR(req))
932 goto out;
933
934 if (unlikely(!(atomic_read(&unit->status) &
935 ZFCP_STATUS_COMMON_UNBLOCKED)))
936 goto out_error_free;
937
938 sbale = zfcp_qdio_sbale_req(req);
939 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
940 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
941
942 req->data = unit;
943 req->handler = zfcp_fsf_abort_fcp_command_handler;
944 req->qtcb->header.lun_handle = unit->handle;
945 req->qtcb->header.port_handle = unit->port->handle;
946 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
947
948 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
949 if (!zfcp_fsf_req_send(req))
950 goto out;
951
952 out_error_free:
953 zfcp_fsf_req_free(req);
954 req = NULL;
955 out:
956 spin_unlock(&adapter->req_q.lock);
957 return req;
958 }
959
960 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
961 {
962 struct zfcp_adapter *adapter = req->adapter;
963 struct zfcp_send_ct *send_ct = req->data;
964 struct fsf_qtcb_header *header = &req->qtcb->header;
965
966 send_ct->status = -EINVAL;
967
968 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
969 goto skip_fsfstatus;
970
971 switch (header->fsf_status) {
972 case FSF_GOOD:
973 zfcp_san_dbf_event_ct_response(req);
974 send_ct->status = 0;
975 break;
976 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
977 zfcp_fsf_class_not_supp(req);
978 break;
979 case FSF_ADAPTER_STATUS_AVAILABLE:
980 switch (header->fsf_status_qual.word[0]){
981 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
982 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
983 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
984 break;
985 }
986 break;
987 case FSF_ACCESS_DENIED:
988 break;
989 case FSF_PORT_BOXED:
990 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
991 ZFCP_STATUS_FSFREQ_RETRY;
992 break;
993 case FSF_PORT_HANDLE_NOT_VALID:
994 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
995 case FSF_GENERIC_COMMAND_REJECTED:
996 case FSF_PAYLOAD_SIZE_MISMATCH:
997 case FSF_REQUEST_SIZE_TOO_LARGE:
998 case FSF_RESPONSE_SIZE_TOO_LARGE:
999 case FSF_SBAL_MISMATCH:
1000 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1001 break;
1002 }
1003
1004 skip_fsfstatus:
1005 if (send_ct->handler)
1006 send_ct->handler(send_ct->handler_data);
1007 }
1008
1009 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1010 struct scatterlist *sg_req,
1011 struct scatterlist *sg_resp, int max_sbals)
1012 {
1013 int bytes;
1014
1015 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1016 sg_req, max_sbals);
1017 if (bytes <= 0)
1018 return -ENOMEM;
1019 req->qtcb->bottom.support.req_buf_length = bytes;
1020 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1021
1022 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1023 sg_resp, max_sbals);
1024 if (bytes <= 0)
1025 return -ENOMEM;
1026 req->qtcb->bottom.support.resp_buf_length = bytes;
1027
1028 return 0;
1029 }
1030
1031 /**
1032 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1033 * @ct: pointer to struct zfcp_send_ct with data for request
1034 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1035 * @erp_action: if non-null the Generic Service request sent within ERP
1036 */
1037 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1038 struct zfcp_erp_action *erp_action)
1039 {
1040 struct zfcp_wka_port *wka_port = ct->wka_port;
1041 struct zfcp_adapter *adapter = wka_port->adapter;
1042 struct zfcp_fsf_req *req;
1043 int ret = -EIO;
1044
1045 spin_lock_bh(&adapter->req_q.lock);
1046 if (zfcp_fsf_req_sbal_get(adapter))
1047 goto out;
1048
1049 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1050 ZFCP_REQ_AUTO_CLEANUP, pool);
1051 if (IS_ERR(req)) {
1052 ret = PTR_ERR(req);
1053 goto out;
1054 }
1055
1056 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1057 FSF_MAX_SBALS_PER_REQ);
1058 if (ret)
1059 goto failed_send;
1060
1061 req->handler = zfcp_fsf_send_ct_handler;
1062 req->qtcb->header.port_handle = wka_port->handle;
1063 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1064 req->qtcb->bottom.support.timeout = ct->timeout;
1065 req->data = ct;
1066
1067 zfcp_san_dbf_event_ct_request(req);
1068
1069 if (erp_action) {
1070 erp_action->fsf_req = req;
1071 req->erp_action = erp_action;
1072 zfcp_fsf_start_erp_timer(req);
1073 } else
1074 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1075
1076 ret = zfcp_fsf_req_send(req);
1077 if (ret)
1078 goto failed_send;
1079
1080 goto out;
1081
1082 failed_send:
1083 zfcp_fsf_req_free(req);
1084 if (erp_action)
1085 erp_action->fsf_req = NULL;
1086 out:
1087 spin_unlock_bh(&adapter->req_q.lock);
1088 return ret;
1089 }
1090
1091 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1092 {
1093 struct zfcp_send_els *send_els = req->data;
1094 struct zfcp_port *port = send_els->port;
1095 struct fsf_qtcb_header *header = &req->qtcb->header;
1096
1097 send_els->status = -EINVAL;
1098
1099 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1100 goto skip_fsfstatus;
1101
1102 switch (header->fsf_status) {
1103 case FSF_GOOD:
1104 zfcp_san_dbf_event_els_response(req);
1105 send_els->status = 0;
1106 break;
1107 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1108 zfcp_fsf_class_not_supp(req);
1109 break;
1110 case FSF_ADAPTER_STATUS_AVAILABLE:
1111 switch (header->fsf_status_qual.word[0]){
1112 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1113 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1114 zfcp_test_link(port);
1115 /*fall through */
1116 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1117 case FSF_SQ_RETRY_IF_POSSIBLE:
1118 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1119 break;
1120 }
1121 break;
1122 case FSF_ELS_COMMAND_REJECTED:
1123 case FSF_PAYLOAD_SIZE_MISMATCH:
1124 case FSF_REQUEST_SIZE_TOO_LARGE:
1125 case FSF_RESPONSE_SIZE_TOO_LARGE:
1126 break;
1127 case FSF_ACCESS_DENIED:
1128 zfcp_fsf_access_denied_port(req, port);
1129 break;
1130 case FSF_SBAL_MISMATCH:
1131 /* should never occure, avoided in zfcp_fsf_send_els */
1132 /* fall through */
1133 default:
1134 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1135 break;
1136 }
1137 skip_fsfstatus:
1138 if (send_els->handler)
1139 send_els->handler(send_els->handler_data);
1140 }
1141
1142 /**
1143 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1144 * @els: pointer to struct zfcp_send_els with data for the command
1145 */
1146 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1147 {
1148 struct zfcp_fsf_req *req;
1149 struct zfcp_adapter *adapter = els->adapter;
1150 struct fsf_qtcb_bottom_support *bottom;
1151 int ret = -EIO;
1152
1153 if (unlikely(!(atomic_read(&els->port->status) &
1154 ZFCP_STATUS_COMMON_UNBLOCKED)))
1155 return -EBUSY;
1156
1157 spin_lock(&adapter->req_q.lock);
1158 if (!zfcp_fsf_sbal_available(adapter))
1159 goto out;
1160 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1161 ZFCP_REQ_AUTO_CLEANUP, NULL);
1162 if (IS_ERR(req)) {
1163 ret = PTR_ERR(req);
1164 goto out;
1165 }
1166
1167 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1168
1169 if (ret)
1170 goto failed_send;
1171
1172 bottom = &req->qtcb->bottom.support;
1173 req->handler = zfcp_fsf_send_els_handler;
1174 bottom->d_id = els->d_id;
1175 bottom->service_class = FSF_CLASS_3;
1176 bottom->timeout = 2 * R_A_TOV;
1177 req->data = els;
1178
1179 zfcp_san_dbf_event_els_request(req);
1180
1181 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1182 ret = zfcp_fsf_req_send(req);
1183 if (ret)
1184 goto failed_send;
1185
1186 goto out;
1187
1188 failed_send:
1189 zfcp_fsf_req_free(req);
1190 out:
1191 spin_unlock(&adapter->req_q.lock);
1192 return ret;
1193 }
1194
1195 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1196 {
1197 struct qdio_buffer_element *sbale;
1198 struct zfcp_fsf_req *req;
1199 struct zfcp_adapter *adapter = erp_action->adapter;
1200 int retval = -EIO;
1201
1202 spin_lock_bh(&adapter->req_q.lock);
1203 if (!zfcp_fsf_sbal_available(adapter))
1204 goto out;
1205 req = zfcp_fsf_req_create(adapter,
1206 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1207 ZFCP_REQ_AUTO_CLEANUP,
1208 adapter->pool.fsf_req_erp);
1209 if (IS_ERR(req)) {
1210 retval = PTR_ERR(req);
1211 goto out;
1212 }
1213
1214 sbale = zfcp_qdio_sbale_req(req);
1215 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1216 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1217
1218 req->qtcb->bottom.config.feature_selection =
1219 FSF_FEATURE_CFDC |
1220 FSF_FEATURE_LUN_SHARING |
1221 FSF_FEATURE_NOTIFICATION_LOST |
1222 FSF_FEATURE_UPDATE_ALERT;
1223 req->erp_action = erp_action;
1224 req->handler = zfcp_fsf_exchange_config_data_handler;
1225 erp_action->fsf_req = req;
1226
1227 zfcp_fsf_start_erp_timer(req);
1228 retval = zfcp_fsf_req_send(req);
1229 if (retval) {
1230 zfcp_fsf_req_free(req);
1231 erp_action->fsf_req = NULL;
1232 }
1233 out:
1234 spin_unlock_bh(&adapter->req_q.lock);
1235 return retval;
1236 }
1237
1238 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1239 struct fsf_qtcb_bottom_config *data)
1240 {
1241 struct qdio_buffer_element *sbale;
1242 struct zfcp_fsf_req *req = NULL;
1243 int retval = -EIO;
1244
1245 spin_lock_bh(&adapter->req_q.lock);
1246 if (zfcp_fsf_req_sbal_get(adapter))
1247 goto out;
1248
1249 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1250 0, NULL);
1251 if (IS_ERR(req)) {
1252 retval = PTR_ERR(req);
1253 goto out;
1254 }
1255
1256 sbale = zfcp_qdio_sbale_req(req);
1257 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1258 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1259 req->handler = zfcp_fsf_exchange_config_data_handler;
1260
1261 req->qtcb->bottom.config.feature_selection =
1262 FSF_FEATURE_CFDC |
1263 FSF_FEATURE_LUN_SHARING |
1264 FSF_FEATURE_NOTIFICATION_LOST |
1265 FSF_FEATURE_UPDATE_ALERT;
1266
1267 if (data)
1268 req->data = data;
1269
1270 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1271 retval = zfcp_fsf_req_send(req);
1272 out:
1273 spin_unlock_bh(&adapter->req_q.lock);
1274 if (!retval)
1275 wait_event(req->completion_wq,
1276 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1277
1278 zfcp_fsf_req_free(req);
1279
1280 return retval;
1281 }
1282
1283 /**
1284 * zfcp_fsf_exchange_port_data - request information about local port
1285 * @erp_action: ERP action for the adapter for which port data is requested
1286 * Returns: 0 on success, error otherwise
1287 */
1288 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1289 {
1290 struct qdio_buffer_element *sbale;
1291 struct zfcp_fsf_req *req;
1292 struct zfcp_adapter *adapter = erp_action->adapter;
1293 int retval = -EIO;
1294
1295 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1296 return -EOPNOTSUPP;
1297
1298 spin_lock_bh(&adapter->req_q.lock);
1299 if (!zfcp_fsf_sbal_available(adapter))
1300 goto out;
1301 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1302 ZFCP_REQ_AUTO_CLEANUP,
1303 adapter->pool.fsf_req_erp);
1304 if (IS_ERR(req)) {
1305 retval = PTR_ERR(req);
1306 goto out;
1307 }
1308
1309 sbale = zfcp_qdio_sbale_req(req);
1310 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1311 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1312
1313 req->handler = zfcp_fsf_exchange_port_data_handler;
1314 req->erp_action = erp_action;
1315 erp_action->fsf_req = req;
1316
1317 zfcp_fsf_start_erp_timer(req);
1318 retval = zfcp_fsf_req_send(req);
1319 if (retval) {
1320 zfcp_fsf_req_free(req);
1321 erp_action->fsf_req = NULL;
1322 }
1323 out:
1324 spin_unlock_bh(&adapter->req_q.lock);
1325 return retval;
1326 }
1327
1328 /**
1329 * zfcp_fsf_exchange_port_data_sync - request information about local port
1330 * @adapter: pointer to struct zfcp_adapter
1331 * @data: pointer to struct fsf_qtcb_bottom_port
1332 * Returns: 0 on success, error otherwise
1333 */
1334 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1335 struct fsf_qtcb_bottom_port *data)
1336 {
1337 struct qdio_buffer_element *sbale;
1338 struct zfcp_fsf_req *req = NULL;
1339 int retval = -EIO;
1340
1341 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1342 return -EOPNOTSUPP;
1343
1344 spin_lock_bh(&adapter->req_q.lock);
1345 if (!zfcp_fsf_sbal_available(adapter))
1346 goto out;
1347
1348 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1349 NULL);
1350 if (IS_ERR(req)) {
1351 retval = PTR_ERR(req);
1352 goto out;
1353 }
1354
1355 if (data)
1356 req->data = data;
1357
1358 sbale = zfcp_qdio_sbale_req(req);
1359 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1360 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1361
1362 req->handler = zfcp_fsf_exchange_port_data_handler;
1363 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1364 retval = zfcp_fsf_req_send(req);
1365 out:
1366 spin_unlock_bh(&adapter->req_q.lock);
1367 if (!retval)
1368 wait_event(req->completion_wq,
1369 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1370 zfcp_fsf_req_free(req);
1371
1372 return retval;
1373 }
1374
1375 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1376 {
1377 struct zfcp_port *port = req->data;
1378 struct fsf_qtcb_header *header = &req->qtcb->header;
1379 struct fsf_plogi *plogi;
1380
1381 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1382 return;
1383
1384 switch (header->fsf_status) {
1385 case FSF_PORT_ALREADY_OPEN:
1386 break;
1387 case FSF_ACCESS_DENIED:
1388 zfcp_fsf_access_denied_port(req, port);
1389 break;
1390 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1391 dev_warn(&req->adapter->ccw_device->dev,
1392 "Not enough FCP adapter resources to open "
1393 "remote port 0x%016Lx\n", port->wwpn);
1394 zfcp_erp_port_failed(port, 31, req);
1395 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1396 break;
1397 case FSF_ADAPTER_STATUS_AVAILABLE:
1398 switch (header->fsf_status_qual.word[0]) {
1399 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1400 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1401 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1402 break;
1403 case FSF_SQ_NO_RETRY_POSSIBLE:
1404 dev_warn(&req->adapter->ccw_device->dev,
1405 "Remote port 0x%016Lx could not be opened\n",
1406 port->wwpn);
1407 zfcp_erp_port_failed(port, 32, req);
1408 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1409 break;
1410 }
1411 break;
1412 case FSF_GOOD:
1413 port->handle = header->port_handle;
1414 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1415 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1416 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1417 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1418 &port->status);
1419 /* check whether D_ID has changed during open */
1420 /*
1421 * FIXME: This check is not airtight, as the FCP channel does
1422 * not monitor closures of target port connections caused on
1423 * the remote side. Thus, they might miss out on invalidating
1424 * locally cached WWPNs (and other N_Port parameters) of gone
1425 * target ports. So, our heroic attempt to make things safe
1426 * could be undermined by 'open port' response data tagged with
1427 * obsolete WWPNs. Another reason to monitor potential
1428 * connection closures ourself at least (by interpreting
1429 * incoming ELS' and unsolicited status). It just crosses my
1430 * mind that one should be able to cross-check by means of
1431 * another GID_PN straight after a port has been opened.
1432 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1433 */
1434 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1435 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1436 if (plogi->serv_param.wwpn != port->wwpn)
1437 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1438 &port->status);
1439 else {
1440 port->wwnn = plogi->serv_param.wwnn;
1441 zfcp_fc_plogi_evaluate(port, plogi);
1442 }
1443 }
1444 break;
1445 case FSF_UNKNOWN_OP_SUBTYPE:
1446 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1447 break;
1448 }
1449 }
1450
1451 /**
1452 * zfcp_fsf_open_port - create and send open port request
1453 * @erp_action: pointer to struct zfcp_erp_action
1454 * Returns: 0 on success, error otherwise
1455 */
1456 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1457 {
1458 struct qdio_buffer_element *sbale;
1459 struct zfcp_adapter *adapter = erp_action->adapter;
1460 struct zfcp_fsf_req *req;
1461 int retval = -EIO;
1462
1463 spin_lock_bh(&adapter->req_q.lock);
1464 if (zfcp_fsf_req_sbal_get(adapter))
1465 goto out;
1466
1467 req = zfcp_fsf_req_create(adapter,
1468 FSF_QTCB_OPEN_PORT_WITH_DID,
1469 ZFCP_REQ_AUTO_CLEANUP,
1470 adapter->pool.fsf_req_erp);
1471 if (IS_ERR(req)) {
1472 retval = PTR_ERR(req);
1473 goto out;
1474 }
1475
1476 sbale = zfcp_qdio_sbale_req(req);
1477 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1478 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1479
1480 req->handler = zfcp_fsf_open_port_handler;
1481 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1482 req->data = erp_action->port;
1483 req->erp_action = erp_action;
1484 erp_action->fsf_req = req;
1485
1486 zfcp_fsf_start_erp_timer(req);
1487 retval = zfcp_fsf_req_send(req);
1488 if (retval) {
1489 zfcp_fsf_req_free(req);
1490 erp_action->fsf_req = NULL;
1491 }
1492 out:
1493 spin_unlock_bh(&adapter->req_q.lock);
1494 return retval;
1495 }
1496
1497 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1498 {
1499 struct zfcp_port *port = req->data;
1500
1501 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1502 return;
1503
1504 switch (req->qtcb->header.fsf_status) {
1505 case FSF_PORT_HANDLE_NOT_VALID:
1506 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1507 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1508 break;
1509 case FSF_ADAPTER_STATUS_AVAILABLE:
1510 break;
1511 case FSF_GOOD:
1512 zfcp_erp_modify_port_status(port, 33, req,
1513 ZFCP_STATUS_COMMON_OPEN,
1514 ZFCP_CLEAR);
1515 break;
1516 }
1517 }
1518
1519 /**
1520 * zfcp_fsf_close_port - create and send close port request
1521 * @erp_action: pointer to struct zfcp_erp_action
1522 * Returns: 0 on success, error otherwise
1523 */
1524 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1525 {
1526 struct qdio_buffer_element *sbale;
1527 struct zfcp_adapter *adapter = erp_action->adapter;
1528 struct zfcp_fsf_req *req;
1529 int retval = -EIO;
1530
1531 spin_lock_bh(&adapter->req_q.lock);
1532 if (zfcp_fsf_req_sbal_get(adapter))
1533 goto out;
1534
1535 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1536 ZFCP_REQ_AUTO_CLEANUP,
1537 adapter->pool.fsf_req_erp);
1538 if (IS_ERR(req)) {
1539 retval = PTR_ERR(req);
1540 goto out;
1541 }
1542
1543 sbale = zfcp_qdio_sbale_req(req);
1544 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1545 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1546
1547 req->handler = zfcp_fsf_close_port_handler;
1548 req->data = erp_action->port;
1549 req->erp_action = erp_action;
1550 req->qtcb->header.port_handle = erp_action->port->handle;
1551 erp_action->fsf_req = req;
1552
1553 zfcp_fsf_start_erp_timer(req);
1554 retval = zfcp_fsf_req_send(req);
1555 if (retval) {
1556 zfcp_fsf_req_free(req);
1557 erp_action->fsf_req = NULL;
1558 }
1559 out:
1560 spin_unlock_bh(&adapter->req_q.lock);
1561 return retval;
1562 }
1563
1564 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1565 {
1566 struct zfcp_wka_port *wka_port = req->data;
1567 struct fsf_qtcb_header *header = &req->qtcb->header;
1568
1569 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1570 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1571 goto out;
1572 }
1573
1574 switch (header->fsf_status) {
1575 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1576 dev_warn(&req->adapter->ccw_device->dev,
1577 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1578 case FSF_ADAPTER_STATUS_AVAILABLE:
1579 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1580 case FSF_ACCESS_DENIED:
1581 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1582 break;
1583 case FSF_PORT_ALREADY_OPEN:
1584 case FSF_GOOD:
1585 wka_port->handle = header->port_handle;
1586 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1587 }
1588 out:
1589 wake_up(&wka_port->completion_wq);
1590 }
1591
1592 /**
1593 * zfcp_fsf_open_wka_port - create and send open wka-port request
1594 * @wka_port: pointer to struct zfcp_wka_port
1595 * Returns: 0 on success, error otherwise
1596 */
1597 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1598 {
1599 struct qdio_buffer_element *sbale;
1600 struct zfcp_adapter *adapter = wka_port->adapter;
1601 struct zfcp_fsf_req *req;
1602 int retval = -EIO;
1603
1604 spin_lock_bh(&adapter->req_q.lock);
1605 if (zfcp_fsf_req_sbal_get(adapter))
1606 goto out;
1607
1608 req = zfcp_fsf_req_create(adapter,
1609 FSF_QTCB_OPEN_PORT_WITH_DID,
1610 ZFCP_REQ_AUTO_CLEANUP,
1611 adapter->pool.fsf_req_erp);
1612 if (unlikely(IS_ERR(req))) {
1613 retval = PTR_ERR(req);
1614 goto out;
1615 }
1616
1617 sbale = zfcp_qdio_sbale_req(req);
1618 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1619 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1620
1621 req->handler = zfcp_fsf_open_wka_port_handler;
1622 req->qtcb->bottom.support.d_id = wka_port->d_id;
1623 req->data = wka_port;
1624
1625 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1626 retval = zfcp_fsf_req_send(req);
1627 if (retval)
1628 zfcp_fsf_req_free(req);
1629 out:
1630 spin_unlock_bh(&adapter->req_q.lock);
1631 return retval;
1632 }
1633
1634 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1635 {
1636 struct zfcp_wka_port *wka_port = req->data;
1637
1638 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1639 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1640 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 107, req);
1641 }
1642
1643 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1644 wake_up(&wka_port->completion_wq);
1645 }
1646
1647 /**
1648 * zfcp_fsf_close_wka_port - create and send close wka port request
1649 * @erp_action: pointer to struct zfcp_erp_action
1650 * Returns: 0 on success, error otherwise
1651 */
1652 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1653 {
1654 struct qdio_buffer_element *sbale;
1655 struct zfcp_adapter *adapter = wka_port->adapter;
1656 struct zfcp_fsf_req *req;
1657 int retval = -EIO;
1658
1659 spin_lock_bh(&adapter->req_q.lock);
1660 if (zfcp_fsf_req_sbal_get(adapter))
1661 goto out;
1662
1663 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1664 ZFCP_REQ_AUTO_CLEANUP,
1665 adapter->pool.fsf_req_erp);
1666 if (unlikely(IS_ERR(req))) {
1667 retval = PTR_ERR(req);
1668 goto out;
1669 }
1670
1671 sbale = zfcp_qdio_sbale_req(req);
1672 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1673 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1674
1675 req->handler = zfcp_fsf_close_wka_port_handler;
1676 req->data = wka_port;
1677 req->qtcb->header.port_handle = wka_port->handle;
1678
1679 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1680 retval = zfcp_fsf_req_send(req);
1681 if (retval)
1682 zfcp_fsf_req_free(req);
1683 out:
1684 spin_unlock_bh(&adapter->req_q.lock);
1685 return retval;
1686 }
1687
1688 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1689 {
1690 struct zfcp_port *port = req->data;
1691 struct fsf_qtcb_header *header = &req->qtcb->header;
1692 struct zfcp_unit *unit;
1693
1694 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1695 goto skip_fsfstatus;
1696
1697 switch (header->fsf_status) {
1698 case FSF_PORT_HANDLE_NOT_VALID:
1699 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1700 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1701 break;
1702 case FSF_ACCESS_DENIED:
1703 zfcp_fsf_access_denied_port(req, port);
1704 break;
1705 case FSF_PORT_BOXED:
1706 zfcp_erp_port_boxed(port, 50, req);
1707 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1708 ZFCP_STATUS_FSFREQ_RETRY;
1709 /* can't use generic zfcp_erp_modify_port_status because
1710 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1711 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1712 list_for_each_entry(unit, &port->unit_list_head, list)
1713 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1714 &unit->status);
1715 break;
1716 case FSF_ADAPTER_STATUS_AVAILABLE:
1717 switch (header->fsf_status_qual.word[0]) {
1718 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1719 /* fall through */
1720 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1721 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1722 break;
1723 }
1724 break;
1725 case FSF_GOOD:
1726 /* can't use generic zfcp_erp_modify_port_status because
1727 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1728 */
1729 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1730 list_for_each_entry(unit, &port->unit_list_head, list)
1731 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1732 &unit->status);
1733 break;
1734 }
1735 skip_fsfstatus:
1736 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1737 }
1738
1739 /**
1740 * zfcp_fsf_close_physical_port - close physical port
1741 * @erp_action: pointer to struct zfcp_erp_action
1742 * Returns: 0 on success
1743 */
1744 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1745 {
1746 struct qdio_buffer_element *sbale;
1747 struct zfcp_adapter *adapter = erp_action->adapter;
1748 struct zfcp_fsf_req *req;
1749 int retval = -EIO;
1750
1751 spin_lock_bh(&adapter->req_q.lock);
1752 if (zfcp_fsf_req_sbal_get(adapter))
1753 goto out;
1754
1755 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1756 ZFCP_REQ_AUTO_CLEANUP,
1757 adapter->pool.fsf_req_erp);
1758 if (IS_ERR(req)) {
1759 retval = PTR_ERR(req);
1760 goto out;
1761 }
1762
1763 sbale = zfcp_qdio_sbale_req(req);
1764 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1765 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1766
1767 req->data = erp_action->port;
1768 req->qtcb->header.port_handle = erp_action->port->handle;
1769 req->erp_action = erp_action;
1770 req->handler = zfcp_fsf_close_physical_port_handler;
1771 erp_action->fsf_req = req;
1772 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1773 &erp_action->port->status);
1774
1775 zfcp_fsf_start_erp_timer(req);
1776 retval = zfcp_fsf_req_send(req);
1777 if (retval) {
1778 zfcp_fsf_req_free(req);
1779 erp_action->fsf_req = NULL;
1780 }
1781 out:
1782 spin_unlock_bh(&adapter->req_q.lock);
1783 return retval;
1784 }
1785
1786 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1787 {
1788 struct zfcp_adapter *adapter = req->adapter;
1789 struct zfcp_unit *unit = req->data;
1790 struct fsf_qtcb_header *header = &req->qtcb->header;
1791 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1792 struct fsf_queue_designator *queue_designator =
1793 &header->fsf_status_qual.fsf_queue_designator;
1794 int exclusive, readwrite;
1795
1796 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1797 return;
1798
1799 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1800 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1801 ZFCP_STATUS_UNIT_SHARED |
1802 ZFCP_STATUS_UNIT_READONLY,
1803 &unit->status);
1804
1805 switch (header->fsf_status) {
1806
1807 case FSF_PORT_HANDLE_NOT_VALID:
1808 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1809 /* fall through */
1810 case FSF_LUN_ALREADY_OPEN:
1811 break;
1812 case FSF_ACCESS_DENIED:
1813 zfcp_fsf_access_denied_unit(req, unit);
1814 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1815 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1816 break;
1817 case FSF_PORT_BOXED:
1818 zfcp_erp_port_boxed(unit->port, 51, req);
1819 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1820 ZFCP_STATUS_FSFREQ_RETRY;
1821 break;
1822 case FSF_LUN_SHARING_VIOLATION:
1823 if (header->fsf_status_qual.word[0])
1824 dev_warn(&adapter->ccw_device->dev,
1825 "LUN 0x%Lx on port 0x%Lx is already in "
1826 "use by CSS%d, MIF Image ID %x\n",
1827 unit->fcp_lun,
1828 unit->port->wwpn,
1829 queue_designator->cssid,
1830 queue_designator->hla);
1831 else
1832 zfcp_act_eval_err(adapter,
1833 header->fsf_status_qual.word[2]);
1834 zfcp_erp_unit_access_denied(unit, 60, req);
1835 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1836 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1837 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1838 break;
1839 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1840 dev_warn(&adapter->ccw_device->dev,
1841 "No handle is available for LUN "
1842 "0x%016Lx on port 0x%016Lx\n",
1843 unit->fcp_lun, unit->port->wwpn);
1844 zfcp_erp_unit_failed(unit, 34, req);
1845 /* fall through */
1846 case FSF_INVALID_COMMAND_OPTION:
1847 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1848 break;
1849 case FSF_ADAPTER_STATUS_AVAILABLE:
1850 switch (header->fsf_status_qual.word[0]) {
1851 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1852 zfcp_test_link(unit->port);
1853 /* fall through */
1854 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1855 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1856 break;
1857 }
1858 break;
1859
1860 case FSF_GOOD:
1861 unit->handle = header->lun_handle;
1862 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1863
1864 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1865 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1866 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1867 exclusive = (bottom->lun_access_info &
1868 FSF_UNIT_ACCESS_EXCLUSIVE);
1869 readwrite = (bottom->lun_access_info &
1870 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1871
1872 if (!exclusive)
1873 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1874 &unit->status);
1875
1876 if (!readwrite) {
1877 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1878 &unit->status);
1879 dev_info(&adapter->ccw_device->dev,
1880 "SCSI device at LUN 0x%016Lx on port "
1881 "0x%016Lx opened read-only\n",
1882 unit->fcp_lun, unit->port->wwpn);
1883 }
1884
1885 if (exclusive && !readwrite) {
1886 dev_err(&adapter->ccw_device->dev,
1887 "Exclusive read-only access not "
1888 "supported (unit 0x%016Lx, "
1889 "port 0x%016Lx)\n",
1890 unit->fcp_lun, unit->port->wwpn);
1891 zfcp_erp_unit_failed(unit, 35, req);
1892 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1893 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1894 } else if (!exclusive && readwrite) {
1895 dev_err(&adapter->ccw_device->dev,
1896 "Shared read-write access not "
1897 "supported (unit 0x%016Lx, port "
1898 "0x%016Lx\n)",
1899 unit->fcp_lun, unit->port->wwpn);
1900 zfcp_erp_unit_failed(unit, 36, req);
1901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1903 }
1904 }
1905 break;
1906 }
1907 }
1908
1909 /**
1910 * zfcp_fsf_open_unit - open unit
1911 * @erp_action: pointer to struct zfcp_erp_action
1912 * Returns: 0 on success, error otherwise
1913 */
1914 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1915 {
1916 struct qdio_buffer_element *sbale;
1917 struct zfcp_adapter *adapter = erp_action->adapter;
1918 struct zfcp_fsf_req *req;
1919 int retval = -EIO;
1920
1921 spin_lock_bh(&adapter->req_q.lock);
1922 if (zfcp_fsf_req_sbal_get(adapter))
1923 goto out;
1924
1925 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1926 ZFCP_REQ_AUTO_CLEANUP,
1927 adapter->pool.fsf_req_erp);
1928 if (IS_ERR(req)) {
1929 retval = PTR_ERR(req);
1930 goto out;
1931 }
1932
1933 sbale = zfcp_qdio_sbale_req(req);
1934 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1935 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1936
1937 req->qtcb->header.port_handle = erp_action->port->handle;
1938 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1939 req->handler = zfcp_fsf_open_unit_handler;
1940 req->data = erp_action->unit;
1941 req->erp_action = erp_action;
1942 erp_action->fsf_req = req;
1943
1944 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1945 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1946
1947 zfcp_fsf_start_erp_timer(req);
1948 retval = zfcp_fsf_req_send(req);
1949 if (retval) {
1950 zfcp_fsf_req_free(req);
1951 erp_action->fsf_req = NULL;
1952 }
1953 out:
1954 spin_unlock_bh(&adapter->req_q.lock);
1955 return retval;
1956 }
1957
1958 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1959 {
1960 struct zfcp_unit *unit = req->data;
1961
1962 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1963 return;
1964
1965 switch (req->qtcb->header.fsf_status) {
1966 case FSF_PORT_HANDLE_NOT_VALID:
1967 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1968 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1969 break;
1970 case FSF_LUN_HANDLE_NOT_VALID:
1971 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1972 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1973 break;
1974 case FSF_PORT_BOXED:
1975 zfcp_erp_port_boxed(unit->port, 52, req);
1976 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1977 ZFCP_STATUS_FSFREQ_RETRY;
1978 break;
1979 case FSF_ADAPTER_STATUS_AVAILABLE:
1980 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1981 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1982 zfcp_test_link(unit->port);
1983 /* fall through */
1984 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1985 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1986 break;
1987 }
1988 break;
1989 case FSF_GOOD:
1990 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1991 break;
1992 }
1993 }
1994
1995 /**
1996 * zfcp_fsf_close_unit - close zfcp unit
1997 * @erp_action: pointer to struct zfcp_unit
1998 * Returns: 0 on success, error otherwise
1999 */
2000 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2001 {
2002 struct qdio_buffer_element *sbale;
2003 struct zfcp_adapter *adapter = erp_action->adapter;
2004 struct zfcp_fsf_req *req;
2005 int retval = -EIO;
2006
2007 spin_lock_bh(&adapter->req_q.lock);
2008 if (zfcp_fsf_req_sbal_get(adapter))
2009 goto out;
2010 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2011 ZFCP_REQ_AUTO_CLEANUP,
2012 adapter->pool.fsf_req_erp);
2013 if (IS_ERR(req)) {
2014 retval = PTR_ERR(req);
2015 goto out;
2016 }
2017
2018 sbale = zfcp_qdio_sbale_req(req);
2019 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2020 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2021
2022 req->qtcb->header.port_handle = erp_action->port->handle;
2023 req->qtcb->header.lun_handle = erp_action->unit->handle;
2024 req->handler = zfcp_fsf_close_unit_handler;
2025 req->data = erp_action->unit;
2026 req->erp_action = erp_action;
2027 erp_action->fsf_req = req;
2028
2029 zfcp_fsf_start_erp_timer(req);
2030 retval = zfcp_fsf_req_send(req);
2031 if (retval) {
2032 zfcp_fsf_req_free(req);
2033 erp_action->fsf_req = NULL;
2034 }
2035 out:
2036 spin_unlock_bh(&adapter->req_q.lock);
2037 return retval;
2038 }
2039
2040 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2041 {
2042 lat_rec->sum += lat;
2043 lat_rec->min = min(lat_rec->min, lat);
2044 lat_rec->max = max(lat_rec->max, lat);
2045 }
2046
2047 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2048 {
2049 struct fsf_qual_latency_info *lat_inf;
2050 struct latency_cont *lat;
2051 struct zfcp_unit *unit = req->unit;
2052 unsigned long flags;
2053
2054 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2055
2056 switch (req->qtcb->bottom.io.data_direction) {
2057 case FSF_DATADIR_READ:
2058 lat = &unit->latencies.read;
2059 break;
2060 case FSF_DATADIR_WRITE:
2061 lat = &unit->latencies.write;
2062 break;
2063 case FSF_DATADIR_CMND:
2064 lat = &unit->latencies.cmd;
2065 break;
2066 default:
2067 return;
2068 }
2069
2070 spin_lock_irqsave(&unit->latencies.lock, flags);
2071 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2072 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2073 lat->counter++;
2074 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2075 }
2076
2077 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2078 {
2079 struct scsi_cmnd *scpnt = req->data;
2080 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2081 &(req->qtcb->bottom.io.fcp_rsp);
2082 u32 sns_len;
2083 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2084 unsigned long flags;
2085
2086 if (unlikely(!scpnt))
2087 return;
2088
2089 read_lock_irqsave(&req->adapter->abort_lock, flags);
2090
2091 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2092 set_host_byte(scpnt, DID_SOFT_ERROR);
2093 set_driver_byte(scpnt, SUGGEST_RETRY);
2094 goto skip_fsfstatus;
2095 }
2096
2097 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2098 set_host_byte(scpnt, DID_ERROR);
2099 goto skip_fsfstatus;
2100 }
2101
2102 set_msg_byte(scpnt, COMMAND_COMPLETE);
2103
2104 scpnt->result |= fcp_rsp_iu->scsi_status;
2105
2106 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2107 zfcp_fsf_req_latency(req);
2108
2109 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2110 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2111 set_host_byte(scpnt, DID_OK);
2112 else {
2113 set_host_byte(scpnt, DID_ERROR);
2114 goto skip_fsfstatus;
2115 }
2116 }
2117
2118 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2119 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2120 fcp_rsp_iu->fcp_rsp_len;
2121 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2122 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2123
2124 memcpy(scpnt->sense_buffer,
2125 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2126 }
2127
2128 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2129 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2130 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2131 scpnt->underflow)
2132 set_host_byte(scpnt, DID_ERROR);
2133 }
2134 skip_fsfstatus:
2135 if (scpnt->result != 0)
2136 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2137 else if (scpnt->retries > 0)
2138 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2139 else
2140 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2141
2142 scpnt->host_scribble = NULL;
2143 (scpnt->scsi_done) (scpnt);
2144 /*
2145 * We must hold this lock until scsi_done has been called.
2146 * Otherwise we may call scsi_done after abort regarding this
2147 * command has completed.
2148 * Note: scsi_done must not block!
2149 */
2150 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2151 }
2152
2153 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2154 {
2155 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2156 &(req->qtcb->bottom.io.fcp_rsp);
2157 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2158
2159 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2160 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2161 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2162 }
2163
2164
2165 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2166 {
2167 struct zfcp_unit *unit;
2168 struct fsf_qtcb_header *header = &req->qtcb->header;
2169
2170 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2171 unit = req->data;
2172 else
2173 unit = req->unit;
2174
2175 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2176 goto skip_fsfstatus;
2177
2178 switch (header->fsf_status) {
2179 case FSF_HANDLE_MISMATCH:
2180 case FSF_PORT_HANDLE_NOT_VALID:
2181 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2182 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2183 break;
2184 case FSF_FCPLUN_NOT_VALID:
2185 case FSF_LUN_HANDLE_NOT_VALID:
2186 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2187 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2188 break;
2189 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2190 zfcp_fsf_class_not_supp(req);
2191 break;
2192 case FSF_ACCESS_DENIED:
2193 zfcp_fsf_access_denied_unit(req, unit);
2194 break;
2195 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2196 dev_err(&req->adapter->ccw_device->dev,
2197 "Incorrect direction %d, unit 0x%016Lx on port "
2198 "0x%016Lx closed\n",
2199 req->qtcb->bottom.io.data_direction,
2200 unit->fcp_lun, unit->port->wwpn);
2201 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2202 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2203 break;
2204 case FSF_CMND_LENGTH_NOT_VALID:
2205 dev_err(&req->adapter->ccw_device->dev,
2206 "Incorrect CDB length %d, unit 0x%016Lx on "
2207 "port 0x%016Lx closed\n",
2208 req->qtcb->bottom.io.fcp_cmnd_length,
2209 unit->fcp_lun, unit->port->wwpn);
2210 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2211 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2212 break;
2213 case FSF_PORT_BOXED:
2214 zfcp_erp_port_boxed(unit->port, 53, req);
2215 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2216 ZFCP_STATUS_FSFREQ_RETRY;
2217 break;
2218 case FSF_LUN_BOXED:
2219 zfcp_erp_unit_boxed(unit, 54, req);
2220 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2221 ZFCP_STATUS_FSFREQ_RETRY;
2222 break;
2223 case FSF_ADAPTER_STATUS_AVAILABLE:
2224 if (header->fsf_status_qual.word[0] ==
2225 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2226 zfcp_test_link(unit->port);
2227 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2228 break;
2229 }
2230 skip_fsfstatus:
2231 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2232 zfcp_fsf_send_fcp_ctm_handler(req);
2233 else {
2234 zfcp_fsf_send_fcp_command_task_handler(req);
2235 req->unit = NULL;
2236 zfcp_unit_put(unit);
2237 }
2238 }
2239
2240 /**
2241 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2242 * @adapter: adapter where scsi command is issued
2243 * @unit: unit where command is sent to
2244 * @scsi_cmnd: scsi command to be sent
2245 * @timer: timer to be started when request is initiated
2246 * @req_flags: flags for fsf_request
2247 */
2248 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2249 struct zfcp_unit *unit,
2250 struct scsi_cmnd *scsi_cmnd,
2251 int use_timer, int req_flags)
2252 {
2253 struct zfcp_fsf_req *req;
2254 struct fcp_cmnd_iu *fcp_cmnd_iu;
2255 unsigned int sbtype;
2256 int real_bytes, retval = -EIO;
2257
2258 if (unlikely(!(atomic_read(&unit->status) &
2259 ZFCP_STATUS_COMMON_UNBLOCKED)))
2260 return -EBUSY;
2261
2262 spin_lock(&adapter->req_q.lock);
2263 if (!zfcp_fsf_sbal_available(adapter))
2264 goto out;
2265 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2266 adapter->pool.fsf_req_scsi);
2267 if (IS_ERR(req)) {
2268 retval = PTR_ERR(req);
2269 goto out;
2270 }
2271
2272 zfcp_unit_get(unit);
2273 req->unit = unit;
2274 req->data = scsi_cmnd;
2275 req->handler = zfcp_fsf_send_fcp_command_handler;
2276 req->qtcb->header.lun_handle = unit->handle;
2277 req->qtcb->header.port_handle = unit->port->handle;
2278 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2279
2280 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2281
2282 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2283 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2284 /*
2285 * set depending on data direction:
2286 * data direction bits in SBALE (SB Type)
2287 * data direction bits in QTCB
2288 * data direction bits in FCP_CMND IU
2289 */
2290 switch (scsi_cmnd->sc_data_direction) {
2291 case DMA_NONE:
2292 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2293 sbtype = SBAL_FLAGS0_TYPE_READ;
2294 break;
2295 case DMA_FROM_DEVICE:
2296 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2297 sbtype = SBAL_FLAGS0_TYPE_READ;
2298 fcp_cmnd_iu->rddata = 1;
2299 break;
2300 case DMA_TO_DEVICE:
2301 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2302 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2303 fcp_cmnd_iu->wddata = 1;
2304 break;
2305 case DMA_BIDIRECTIONAL:
2306 default:
2307 retval = -EIO;
2308 goto failed_scsi_cmnd;
2309 }
2310
2311 if (likely((scsi_cmnd->device->simple_tags) ||
2312 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2313 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2314 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2315 else
2316 fcp_cmnd_iu->task_attribute = UNTAGGED;
2317
2318 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2319 fcp_cmnd_iu->add_fcp_cdb_length =
2320 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2321
2322 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2323
2324 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2325 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(fcp_dl_t);
2326
2327 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2328 scsi_sglist(scsi_cmnd),
2329 FSF_MAX_SBALS_PER_REQ);
2330 if (unlikely(real_bytes < 0)) {
2331 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2332 retval = -EIO;
2333 else {
2334 dev_err(&adapter->ccw_device->dev,
2335 "Oversize data package, unit 0x%016Lx "
2336 "on port 0x%016Lx closed\n",
2337 unit->fcp_lun, unit->port->wwpn);
2338 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2339 retval = -EINVAL;
2340 }
2341 goto failed_scsi_cmnd;
2342 }
2343
2344 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2345
2346 if (use_timer)
2347 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2348
2349 retval = zfcp_fsf_req_send(req);
2350 if (unlikely(retval))
2351 goto failed_scsi_cmnd;
2352
2353 goto out;
2354
2355 failed_scsi_cmnd:
2356 zfcp_unit_put(unit);
2357 zfcp_fsf_req_free(req);
2358 scsi_cmnd->host_scribble = NULL;
2359 out:
2360 spin_unlock(&adapter->req_q.lock);
2361 return retval;
2362 }
2363
2364 /**
2365 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2366 * @adapter: pointer to struct zfcp-adapter
2367 * @unit: pointer to struct zfcp_unit
2368 * @tm_flags: unsigned byte for task management flags
2369 * @req_flags: int request flags
2370 * Returns: on success pointer to struct fsf_req, NULL otherwise
2371 */
2372 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2373 struct zfcp_unit *unit,
2374 u8 tm_flags, int req_flags)
2375 {
2376 struct qdio_buffer_element *sbale;
2377 struct zfcp_fsf_req *req = NULL;
2378 struct fcp_cmnd_iu *fcp_cmnd_iu;
2379
2380 if (unlikely(!(atomic_read(&unit->status) &
2381 ZFCP_STATUS_COMMON_UNBLOCKED)))
2382 return NULL;
2383
2384 spin_lock(&adapter->req_q.lock);
2385 if (!zfcp_fsf_sbal_available(adapter))
2386 goto out;
2387 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2388 adapter->pool.fsf_req_scsi);
2389 if (IS_ERR(req))
2390 goto out;
2391
2392 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2393 req->data = unit;
2394 req->handler = zfcp_fsf_send_fcp_command_handler;
2395 req->qtcb->header.lun_handle = unit->handle;
2396 req->qtcb->header.port_handle = unit->port->handle;
2397 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2398 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2399 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2400 sizeof(fcp_dl_t);
2401
2402 sbale = zfcp_qdio_sbale_req(req);
2403 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2404 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2405
2406 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2407 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2408 fcp_cmnd_iu->task_management_flags = tm_flags;
2409
2410 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2411 if (!zfcp_fsf_req_send(req))
2412 goto out;
2413
2414 zfcp_fsf_req_free(req);
2415 req = NULL;
2416 out:
2417 spin_unlock(&adapter->req_q.lock);
2418 return req;
2419 }
2420
2421 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2422 {
2423 if (req->qtcb->header.fsf_status != FSF_GOOD)
2424 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2425 }
2426
2427 /**
2428 * zfcp_fsf_control_file - control file upload/download
2429 * @adapter: pointer to struct zfcp_adapter
2430 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2431 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2432 */
2433 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2434 struct zfcp_fsf_cfdc *fsf_cfdc)
2435 {
2436 struct qdio_buffer_element *sbale;
2437 struct zfcp_fsf_req *req = NULL;
2438 struct fsf_qtcb_bottom_support *bottom;
2439 int direction, retval = -EIO, bytes;
2440
2441 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2442 return ERR_PTR(-EOPNOTSUPP);
2443
2444 switch (fsf_cfdc->command) {
2445 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2446 direction = SBAL_FLAGS0_TYPE_WRITE;
2447 break;
2448 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2449 direction = SBAL_FLAGS0_TYPE_READ;
2450 break;
2451 default:
2452 return ERR_PTR(-EINVAL);
2453 }
2454
2455 spin_lock_bh(&adapter->req_q.lock);
2456 if (zfcp_fsf_req_sbal_get(adapter))
2457 goto out;
2458
2459 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2460 if (IS_ERR(req)) {
2461 retval = -EPERM;
2462 goto out;
2463 }
2464
2465 req->handler = zfcp_fsf_control_file_handler;
2466
2467 sbale = zfcp_qdio_sbale_req(req);
2468 sbale[0].flags |= direction;
2469
2470 bottom = &req->qtcb->bottom.support;
2471 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2472 bottom->option = fsf_cfdc->option;
2473
2474 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2475 FSF_MAX_SBALS_PER_REQ);
2476 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2477 retval = -ENOMEM;
2478 zfcp_fsf_req_free(req);
2479 goto out;
2480 }
2481
2482 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2483 retval = zfcp_fsf_req_send(req);
2484 out:
2485 spin_unlock_bh(&adapter->req_q.lock);
2486
2487 if (!retval) {
2488 wait_event(req->completion_wq,
2489 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2490 return req;
2491 }
2492 return ERR_PTR(retval);
2493 }
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