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[SCSI] zfcp: fix req_list_locking.
[linux-2.6/mini2440.git] / drivers / s390 / scsi / zfcp_fsf.c
blob694d9c9ea7cc0c496d620f682f1c7be77e8d6e61
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2008
7 */
8
9 #include <linux/blktrace_api.h>
10 #include "zfcp_ext.h"
11
12 static void zfcp_fsf_request_timeout_handler(unsigned long data)
13 {
14 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
15 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
16 NULL);
17 }
18
19 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
20 unsigned long timeout)
21 {
22 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
23 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
24 fsf_req->timer.expires = jiffies + timeout;
25 add_timer(&fsf_req->timer);
26 }
27
28 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
29 {
30 BUG_ON(!fsf_req->erp_action);
31 fsf_req->timer.function = zfcp_erp_timeout_handler;
32 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
33 fsf_req->timer.expires = jiffies + 30 * HZ;
34 add_timer(&fsf_req->timer);
35 }
36
37 /* association between FSF command and FSF QTCB type */
38 static u32 fsf_qtcb_type[] = {
39 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
40 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
41 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
42 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
43 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
49 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
50 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
52 };
53
54 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
55 {
56 u16 subtable = table >> 16;
57 u16 rule = table & 0xffff;
58 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
59
60 if (subtable && subtable < ARRAY_SIZE(act_type))
61 dev_warn(&adapter->ccw_device->dev,
62 "Access denied according to ACT rule type %s, "
63 "rule %d\n", act_type[subtable], rule);
64 }
65
66 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
67 struct zfcp_port *port)
68 {
69 struct fsf_qtcb_header *header = &req->qtcb->header;
70 dev_warn(&req->adapter->ccw_device->dev,
71 "Access denied to port 0x%016Lx\n",
72 (unsigned long long)port->wwpn);
73 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
74 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
75 zfcp_erp_port_access_denied(port, 55, req);
76 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
77 }
78
79 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
80 struct zfcp_unit *unit)
81 {
82 struct fsf_qtcb_header *header = &req->qtcb->header;
83 dev_warn(&req->adapter->ccw_device->dev,
84 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
85 (unsigned long long)unit->fcp_lun,
86 (unsigned long long)unit->port->wwpn);
87 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
88 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
89 zfcp_erp_unit_access_denied(unit, 59, req);
90 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
91 }
92
93 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
94 {
95 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
96 "operational because of an unsupported FC class\n");
97 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
98 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
99 }
100
101 /**
102 * zfcp_fsf_req_free - free memory used by fsf request
103 * @fsf_req: pointer to struct zfcp_fsf_req
104 */
105 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
106 {
107 if (likely(req->pool)) {
108 mempool_free(req, req->pool);
109 return;
110 }
111
112 if (req->qtcb) {
113 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
114 return;
115 }
116 }
117
118 /**
119 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
120 * @adapter: pointer to struct zfcp_adapter
121 *
122 * Never ever call this without shutting down the adapter first.
123 * Otherwise the adapter would continue using and corrupting s390 storage.
124 * Included BUG_ON() call to ensure this is done.
125 * ERP is supposed to be the only user of this function.
126 */
127 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
128 {
129 struct zfcp_fsf_req *req, *tmp;
130 unsigned long flags;
131 LIST_HEAD(remove_queue);
132 unsigned int i;
133
134 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
135 spin_lock_irqsave(&adapter->req_list_lock, flags);
136 for (i = 0; i < REQUEST_LIST_SIZE; i++)
137 list_splice_init(&adapter->req_list[i], &remove_queue);
138 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
139
140 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
141 list_del(&req->list);
142 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
143 zfcp_fsf_req_complete(req);
144 }
145 }
146
147 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
148 {
149 struct fsf_status_read_buffer *sr_buf = req->data;
150 struct zfcp_adapter *adapter = req->adapter;
151 struct zfcp_port *port;
152 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
153 unsigned long flags;
154
155 read_lock_irqsave(&zfcp_data.config_lock, flags);
156 list_for_each_entry(port, &adapter->port_list_head, list)
157 if (port->d_id == d_id) {
158 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
159 switch (sr_buf->status_subtype) {
160 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
161 zfcp_erp_port_reopen(port, 0, 101, req);
162 break;
163 case FSF_STATUS_READ_SUB_ERROR_PORT:
164 zfcp_erp_port_shutdown(port, 0, 122, req);
165 break;
166 }
167 return;
168 }
169 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
170 }
171
172 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
173 struct fsf_link_down_info *link_down)
174 {
175 struct zfcp_adapter *adapter = req->adapter;
176
177 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
178 return;
179
180 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
181
182 if (!link_down)
183 goto out;
184
185 switch (link_down->error_code) {
186 case FSF_PSQ_LINK_NO_LIGHT:
187 dev_warn(&req->adapter->ccw_device->dev,
188 "There is no light signal from the local "
189 "fibre channel cable\n");
190 break;
191 case FSF_PSQ_LINK_WRAP_PLUG:
192 dev_warn(&req->adapter->ccw_device->dev,
193 "There is a wrap plug instead of a fibre "
194 "channel cable\n");
195 break;
196 case FSF_PSQ_LINK_NO_FCP:
197 dev_warn(&req->adapter->ccw_device->dev,
198 "The adjacent fibre channel node does not "
199 "support FCP\n");
200 break;
201 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
202 dev_warn(&req->adapter->ccw_device->dev,
203 "The FCP device is suspended because of a "
204 "firmware update\n");
205 break;
206 case FSF_PSQ_LINK_INVALID_WWPN:
207 dev_warn(&req->adapter->ccw_device->dev,
208 "The FCP device detected a WWPN that is "
209 "duplicate or not valid\n");
210 break;
211 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
212 dev_warn(&req->adapter->ccw_device->dev,
213 "The fibre channel fabric does not support NPIV\n");
214 break;
215 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
216 dev_warn(&req->adapter->ccw_device->dev,
217 "The FCP adapter cannot support more NPIV ports\n");
218 break;
219 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The adjacent switch cannot support "
222 "more NPIV ports\n");
223 break;
224 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
225 dev_warn(&req->adapter->ccw_device->dev,
226 "The FCP adapter could not log in to the "
227 "fibre channel fabric\n");
228 break;
229 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
230 dev_warn(&req->adapter->ccw_device->dev,
231 "The WWPN assignment file on the FCP adapter "
232 "has been damaged\n");
233 break;
234 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
235 dev_warn(&req->adapter->ccw_device->dev,
236 "The mode table on the FCP adapter "
237 "has been damaged\n");
238 break;
239 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
240 dev_warn(&req->adapter->ccw_device->dev,
241 "All NPIV ports on the FCP adapter have "
242 "been assigned\n");
243 break;
244 default:
245 dev_warn(&req->adapter->ccw_device->dev,
246 "The link between the FCP adapter and "
247 "the FC fabric is down\n");
248 }
249 out:
250 zfcp_erp_adapter_failed(adapter, id, req);
251 }
252
253 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
254 {
255 struct fsf_status_read_buffer *sr_buf = req->data;
256 struct fsf_link_down_info *ldi =
257 (struct fsf_link_down_info *) &sr_buf->payload;
258
259 switch (sr_buf->status_subtype) {
260 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
261 zfcp_fsf_link_down_info_eval(req, 38, ldi);
262 break;
263 case FSF_STATUS_READ_SUB_FDISC_FAILED:
264 zfcp_fsf_link_down_info_eval(req, 39, ldi);
265 break;
266 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
267 zfcp_fsf_link_down_info_eval(req, 40, NULL);
268 };
269 }
270
271 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
272 {
273 struct zfcp_adapter *adapter = req->adapter;
274 struct fsf_status_read_buffer *sr_buf = req->data;
275
276 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
277 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
278 mempool_free(sr_buf, adapter->pool.data_status_read);
279 zfcp_fsf_req_free(req);
280 return;
281 }
282
283 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
284
285 switch (sr_buf->status_type) {
286 case FSF_STATUS_READ_PORT_CLOSED:
287 zfcp_fsf_status_read_port_closed(req);
288 break;
289 case FSF_STATUS_READ_INCOMING_ELS:
290 zfcp_fc_incoming_els(req);
291 break;
292 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
293 break;
294 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
295 dev_warn(&adapter->ccw_device->dev,
296 "The error threshold for checksum statistics "
297 "has been exceeded\n");
298 zfcp_hba_dbf_event_berr(adapter, req);
299 break;
300 case FSF_STATUS_READ_LINK_DOWN:
301 zfcp_fsf_status_read_link_down(req);
302 break;
303 case FSF_STATUS_READ_LINK_UP:
304 dev_info(&adapter->ccw_device->dev,
305 "The local link has been restored\n");
306 /* All ports should be marked as ready to run again */
307 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
308 ZFCP_STATUS_COMMON_RUNNING,
309 ZFCP_SET);
310 zfcp_erp_adapter_reopen(adapter,
311 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
312 ZFCP_STATUS_COMMON_ERP_FAILED,
313 102, req);
314 break;
315 case FSF_STATUS_READ_NOTIFICATION_LOST:
316 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
317 zfcp_erp_adapter_access_changed(adapter, 135, req);
318 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
319 schedule_work(&adapter->scan_work);
320 break;
321 case FSF_STATUS_READ_CFDC_UPDATED:
322 zfcp_erp_adapter_access_changed(adapter, 136, req);
323 break;
324 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
325 adapter->adapter_features = sr_buf->payload.word[0];
326 break;
327 }
328
329 mempool_free(sr_buf, adapter->pool.data_status_read);
330 zfcp_fsf_req_free(req);
331
332 atomic_inc(&adapter->stat_miss);
333 queue_work(zfcp_data.work_queue, &adapter->stat_work);
334 }
335
336 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
337 {
338 switch (req->qtcb->header.fsf_status_qual.word[0]) {
339 case FSF_SQ_FCP_RSP_AVAILABLE:
340 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
341 case FSF_SQ_NO_RETRY_POSSIBLE:
342 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
343 return;
344 case FSF_SQ_COMMAND_ABORTED:
345 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
346 break;
347 case FSF_SQ_NO_RECOM:
348 dev_err(&req->adapter->ccw_device->dev,
349 "The FCP adapter reported a problem "
350 "that cannot be recovered\n");
351 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
352 break;
353 }
354 /* all non-return stats set FSFREQ_ERROR*/
355 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
356 }
357
358 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
359 {
360 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
361 return;
362
363 switch (req->qtcb->header.fsf_status) {
364 case FSF_UNKNOWN_COMMAND:
365 dev_err(&req->adapter->ccw_device->dev,
366 "The FCP adapter does not recognize the command 0x%x\n",
367 req->qtcb->header.fsf_command);
368 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
369 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
370 break;
371 case FSF_ADAPTER_STATUS_AVAILABLE:
372 zfcp_fsf_fsfstatus_qual_eval(req);
373 break;
374 }
375 }
376
377 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
378 {
379 struct zfcp_adapter *adapter = req->adapter;
380 struct fsf_qtcb *qtcb = req->qtcb;
381 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
382
383 zfcp_hba_dbf_event_fsf_response(req);
384
385 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
386 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
387 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
388 return;
389 }
390
391 switch (qtcb->prefix.prot_status) {
392 case FSF_PROT_GOOD:
393 case FSF_PROT_FSF_STATUS_PRESENTED:
394 return;
395 case FSF_PROT_QTCB_VERSION_ERROR:
396 dev_err(&adapter->ccw_device->dev,
397 "QTCB version 0x%x not supported by FCP adapter "
398 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
399 psq->word[0], psq->word[1]);
400 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
401 break;
402 case FSF_PROT_ERROR_STATE:
403 case FSF_PROT_SEQ_NUMB_ERROR:
404 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
405 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
406 break;
407 case FSF_PROT_UNSUPP_QTCB_TYPE:
408 dev_err(&adapter->ccw_device->dev,
409 "The QTCB type is not supported by the FCP adapter\n");
410 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
411 break;
412 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
413 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
414 &adapter->status);
415 break;
416 case FSF_PROT_DUPLICATE_REQUEST_ID:
417 dev_err(&adapter->ccw_device->dev,
418 "0x%Lx is an ambiguous request identifier\n",
419 (unsigned long long)qtcb->bottom.support.req_handle);
420 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
421 break;
422 case FSF_PROT_LINK_DOWN:
423 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
424 /* FIXME: reopening adapter now? better wait for link up */
425 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
426 break;
427 case FSF_PROT_REEST_QUEUE:
428 /* All ports should be marked as ready to run again */
429 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
430 ZFCP_STATUS_COMMON_RUNNING,
431 ZFCP_SET);
432 zfcp_erp_adapter_reopen(adapter,
433 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
434 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
435 break;
436 default:
437 dev_err(&adapter->ccw_device->dev,
438 "0x%x is not a valid transfer protocol status\n",
439 qtcb->prefix.prot_status);
440 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
441 }
442 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
443 }
444
445 /**
446 * zfcp_fsf_req_complete - process completion of a FSF request
447 * @fsf_req: The FSF request that has been completed.
448 *
449 * When a request has been completed either from the FCP adapter,
450 * or it has been dismissed due to a queue shutdown, this function
451 * is called to process the completion status and trigger further
452 * events related to the FSF request.
453 */
454 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
455 {
456 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
457 zfcp_fsf_status_read_handler(req);
458 return;
459 }
460
461 del_timer(&req->timer);
462 zfcp_fsf_protstatus_eval(req);
463 zfcp_fsf_fsfstatus_eval(req);
464 req->handler(req);
465
466 if (req->erp_action)
467 zfcp_erp_notify(req->erp_action, 0);
468 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
469
470 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
471 zfcp_fsf_req_free(req);
472 else
473 /* notify initiator waiting for the requests completion */
474 /*
475 * FIXME: Race! We must not access fsf_req here as it might have been
476 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
477 * flag. It's an improbable case. But, we have the same paranoia for
478 * the cleanup flag already.
479 * Might better be handled using complete()?
480 * (setting the flag and doing wakeup ought to be atomic
481 * with regard to checking the flag as long as waitqueue is
482 * part of the to be released structure)
483 */
484 wake_up(&req->completion_wq);
485 }
486
487 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
488 {
489 struct fsf_qtcb_bottom_config *bottom;
490 struct zfcp_adapter *adapter = req->adapter;
491 struct Scsi_Host *shost = adapter->scsi_host;
492
493 bottom = &req->qtcb->bottom.config;
494
495 if (req->data)
496 memcpy(req->data, bottom, sizeof(*bottom));
497
498 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
499 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
500 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
501 fc_host_speed(shost) = bottom->fc_link_speed;
502 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
503
504 adapter->hydra_version = bottom->adapter_type;
505 adapter->timer_ticks = bottom->timer_interval;
506
507 if (fc_host_permanent_port_name(shost) == -1)
508 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
509
510 switch (bottom->fc_topology) {
511 case FSF_TOPO_P2P:
512 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
513 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
514 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
515 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
516 break;
517 case FSF_TOPO_FABRIC:
518 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
519 break;
520 case FSF_TOPO_AL:
521 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
522 default:
523 dev_err(&adapter->ccw_device->dev,
524 "Unknown or unsupported arbitrated loop "
525 "fibre channel topology detected\n");
526 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
527 return -EIO;
528 }
529
530 return 0;
531 }
532
533 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
534 {
535 struct zfcp_adapter *adapter = req->adapter;
536 struct fsf_qtcb *qtcb = req->qtcb;
537 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
538 struct Scsi_Host *shost = adapter->scsi_host;
539
540 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
541 return;
542
543 adapter->fsf_lic_version = bottom->lic_version;
544 adapter->adapter_features = bottom->adapter_features;
545 adapter->connection_features = bottom->connection_features;
546 adapter->peer_wwpn = 0;
547 adapter->peer_wwnn = 0;
548 adapter->peer_d_id = 0;
549
550 switch (qtcb->header.fsf_status) {
551 case FSF_GOOD:
552 if (zfcp_fsf_exchange_config_evaluate(req))
553 return;
554
555 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
556 dev_err(&adapter->ccw_device->dev,
557 "FCP adapter maximum QTCB size (%d bytes) "
558 "is too small\n",
559 bottom->max_qtcb_size);
560 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
561 return;
562 }
563 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
564 &adapter->status);
565 break;
566 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
567 fc_host_node_name(shost) = 0;
568 fc_host_port_name(shost) = 0;
569 fc_host_port_id(shost) = 0;
570 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
571 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
572 adapter->hydra_version = 0;
573
574 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
575 &adapter->status);
576
577 zfcp_fsf_link_down_info_eval(req, 42,
578 &qtcb->header.fsf_status_qual.link_down_info);
579 break;
580 default:
581 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
582 return;
583 }
584
585 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
586 adapter->hardware_version = bottom->hardware_version;
587 memcpy(fc_host_serial_number(shost), bottom->serial_number,
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 EBCASC(fc_host_serial_number(shost),
590 min(FC_SERIAL_NUMBER_SIZE, 17));
591 }
592
593 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
594 dev_err(&adapter->ccw_device->dev,
595 "The FCP adapter only supports newer "
596 "control block versions\n");
597 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
598 return;
599 }
600 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
601 dev_err(&adapter->ccw_device->dev,
602 "The FCP adapter only supports older "
603 "control block versions\n");
604 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
605 }
606 }
607
608 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
609 {
610 struct zfcp_adapter *adapter = req->adapter;
611 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
612 struct Scsi_Host *shost = adapter->scsi_host;
613
614 if (req->data)
615 memcpy(req->data, bottom, sizeof(*bottom));
616
617 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
618 fc_host_permanent_port_name(shost) = bottom->wwpn;
619 else
620 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
621 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
622 fc_host_supported_speeds(shost) = bottom->supported_speed;
623 }
624
625 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
626 {
627 struct fsf_qtcb *qtcb = req->qtcb;
628
629 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
630 return;
631
632 switch (qtcb->header.fsf_status) {
633 case FSF_GOOD:
634 zfcp_fsf_exchange_port_evaluate(req);
635 break;
636 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
637 zfcp_fsf_exchange_port_evaluate(req);
638 zfcp_fsf_link_down_info_eval(req, 43,
639 &qtcb->header.fsf_status_qual.link_down_info);
640 break;
641 }
642 }
643
644 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
645 {
646 struct zfcp_qdio_queue *req_q = &adapter->req_q;
647
648 spin_lock_bh(&adapter->req_q_lock);
649 if (atomic_read(&req_q->count))
650 return 1;
651 spin_unlock_bh(&adapter->req_q_lock);
652 return 0;
653 }
654
655 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
656 {
657 unsigned int count = atomic_read(&adapter->req_q.count);
658 if (!count)
659 atomic_inc(&adapter->qdio_outb_full);
660 return count > 0;
661 }
662
663 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
664 {
665 long ret;
666
667 spin_unlock_bh(&adapter->req_q_lock);
668 ret = wait_event_interruptible_timeout(adapter->request_wq,
669 zfcp_fsf_sbal_check(adapter), 5 * HZ);
670 if (ret > 0)
671 return 0;
672 if (!ret)
673 atomic_inc(&adapter->qdio_outb_full);
674
675 spin_lock_bh(&adapter->req_q_lock);
676 return -EIO;
677 }
678
679 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
680 {
681 struct zfcp_fsf_req *req;
682 req = mempool_alloc(pool, GFP_ATOMIC);
683 if (!req)
684 return NULL;
685 memset(req, 0, sizeof(*req));
686 return req;
687 }
688
689 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
690 {
691 struct zfcp_fsf_req_qtcb *qtcb;
692
693 if (likely(pool))
694 qtcb = mempool_alloc(pool, GFP_ATOMIC);
695 else
696 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
697 GFP_ATOMIC);
698 if (unlikely(!qtcb))
699 return NULL;
700
701 memset(qtcb, 0, sizeof(*qtcb));
702 qtcb->fsf_req.qtcb = &qtcb->qtcb;
703 qtcb->fsf_req.pool = pool;
704
705 return &qtcb->fsf_req;
706 }
707
708 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
709 u32 fsf_cmd, int req_flags,
710 mempool_t *pool)
711 {
712 struct qdio_buffer_element *sbale;
713
714 struct zfcp_fsf_req *req;
715 struct zfcp_qdio_queue *req_q = &adapter->req_q;
716
717 if (req_flags & ZFCP_REQ_NO_QTCB)
718 req = zfcp_fsf_alloc_noqtcb(pool);
719 else
720 req = zfcp_fsf_alloc_qtcb(pool);
721
722 if (unlikely(!req))
723 return ERR_PTR(-EIO);
724
725 if (adapter->req_no == 0)
726 adapter->req_no++;
727
728 INIT_LIST_HEAD(&req->list);
729 init_timer(&req->timer);
730 init_waitqueue_head(&req->completion_wq);
731
732 req->adapter = adapter;
733 req->fsf_command = fsf_cmd;
734 req->req_id = adapter->req_no++;
735 req->sbal_number = 1;
736 req->sbal_first = req_q->first;
737 req->sbal_last = req_q->first;
738 req->sbale_curr = 1;
739
740 sbale = zfcp_qdio_sbale_req(req);
741 sbale[0].addr = (void *) req->req_id;
742 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
743
744 if (likely(req->qtcb)) {
745 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
746 req->qtcb->prefix.req_id = req->req_id;
747 req->qtcb->prefix.ulp_info = 26;
748 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
749 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
750 req->qtcb->header.req_handle = req->req_id;
751 req->qtcb->header.fsf_command = req->fsf_command;
752 req->seq_no = adapter->fsf_req_seq_no;
753 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
754 sbale[1].addr = (void *) req->qtcb;
755 sbale[1].length = sizeof(struct fsf_qtcb);
756 }
757
758 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
759 zfcp_fsf_req_free(req);
760 return ERR_PTR(-EIO);
761 }
762
763 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
764 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
765
766 return req;
767 }
768
769 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
770 {
771 struct zfcp_adapter *adapter = req->adapter;
772 struct zfcp_qdio_queue *req_q = &adapter->req_q;
773 unsigned long flags;
774 int idx;
775
776 /* put allocated FSF request into hash table */
777 spin_lock_irqsave(&adapter->req_list_lock, flags);
778 idx = zfcp_reqlist_hash(req->req_id);
779 list_add_tail(&req->list, &adapter->req_list[idx]);
780 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
781
782 req->qdio_outb_usage = atomic_read(&req_q->count);
783 req->issued = get_clock();
784 if (zfcp_qdio_send(req)) {
785 /* Queues are down..... */
786 del_timer(&req->timer);
787 spin_lock(&adapter->req_list_lock);
788 zfcp_reqlist_remove(adapter, req);
789 spin_unlock(&adapter->req_list_lock);
790 /* undo changes in request queue made for this request */
791 atomic_add(req->sbal_number, &req_q->count);
792 req_q->first -= req->sbal_number;
793 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
794 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
795 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
796 return -EIO;
797 }
798
799 /* Don't increase for unsolicited status */
800 if (req->qtcb)
801 adapter->fsf_req_seq_no++;
802
803 return 0;
804 }
805
806 /**
807 * zfcp_fsf_status_read - send status read request
808 * @adapter: pointer to struct zfcp_adapter
809 * @req_flags: request flags
810 * Returns: 0 on success, ERROR otherwise
811 */
812 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
813 {
814 struct zfcp_fsf_req *req;
815 struct fsf_status_read_buffer *sr_buf;
816 struct qdio_buffer_element *sbale;
817 int retval = -EIO;
818
819 spin_lock_bh(&adapter->req_q_lock);
820 if (zfcp_fsf_req_sbal_get(adapter))
821 goto out;
822
823 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
824 ZFCP_REQ_NO_QTCB,
825 adapter->pool.fsf_req_status_read);
826 if (IS_ERR(req)) {
827 retval = PTR_ERR(req);
828 goto out;
829 }
830
831 sbale = zfcp_qdio_sbale_req(req);
832 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
833 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
834 req->sbale_curr = 2;
835
836 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
837 if (!sr_buf) {
838 retval = -ENOMEM;
839 goto failed_buf;
840 }
841 memset(sr_buf, 0, sizeof(*sr_buf));
842 req->data = sr_buf;
843 sbale = zfcp_qdio_sbale_curr(req);
844 sbale->addr = (void *) sr_buf;
845 sbale->length = sizeof(*sr_buf);
846
847 retval = zfcp_fsf_req_send(req);
848 if (retval)
849 goto failed_req_send;
850
851 goto out;
852
853 failed_req_send:
854 mempool_free(sr_buf, adapter->pool.data_status_read);
855 failed_buf:
856 zfcp_fsf_req_free(req);
857 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
858 out:
859 spin_unlock_bh(&adapter->req_q_lock);
860 return retval;
861 }
862
863 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
864 {
865 struct zfcp_unit *unit = req->data;
866 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
867
868 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
869 return;
870
871 switch (req->qtcb->header.fsf_status) {
872 case FSF_PORT_HANDLE_NOT_VALID:
873 if (fsq->word[0] == fsq->word[1]) {
874 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
875 req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
877 }
878 break;
879 case FSF_LUN_HANDLE_NOT_VALID:
880 if (fsq->word[0] == fsq->word[1]) {
881 zfcp_erp_port_reopen(unit->port, 0, 105, req);
882 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
883 }
884 break;
885 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
886 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
887 break;
888 case FSF_PORT_BOXED:
889 zfcp_erp_port_boxed(unit->port, 47, req);
890 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
891 ZFCP_STATUS_FSFREQ_RETRY;
892 break;
893 case FSF_LUN_BOXED:
894 zfcp_erp_unit_boxed(unit, 48, req);
895 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
896 ZFCP_STATUS_FSFREQ_RETRY;
897 break;
898 case FSF_ADAPTER_STATUS_AVAILABLE:
899 switch (fsq->word[0]) {
900 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
901 zfcp_test_link(unit->port);
902 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
904 break;
905 }
906 break;
907 case FSF_GOOD:
908 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
909 break;
910 }
911 }
912
913 /**
914 * zfcp_fsf_abort_fcp_command - abort running SCSI command
915 * @old_req_id: unsigned long
916 * @adapter: pointer to struct zfcp_adapter
917 * @unit: pointer to struct zfcp_unit
918 * @req_flags: integer specifying the request flags
919 * Returns: pointer to struct zfcp_fsf_req
920 *
921 * FIXME(design): should be watched by a timeout !!!
922 */
923
924 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
925 struct zfcp_adapter *adapter,
926 struct zfcp_unit *unit,
927 int req_flags)
928 {
929 struct qdio_buffer_element *sbale;
930 struct zfcp_fsf_req *req = NULL;
931
932 spin_lock(&adapter->req_q_lock);
933 if (!zfcp_fsf_sbal_available(adapter))
934 goto out;
935 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
936 req_flags, adapter->pool.fsf_req_abort);
937 if (IS_ERR(req))
938 goto out;
939
940 if (unlikely(!(atomic_read(&unit->status) &
941 ZFCP_STATUS_COMMON_UNBLOCKED)))
942 goto out_error_free;
943
944 sbale = zfcp_qdio_sbale_req(req);
945 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
946 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
947
948 req->data = unit;
949 req->handler = zfcp_fsf_abort_fcp_command_handler;
950 req->qtcb->header.lun_handle = unit->handle;
951 req->qtcb->header.port_handle = unit->port->handle;
952 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
953
954 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
955 if (!zfcp_fsf_req_send(req))
956 goto out;
957
958 out_error_free:
959 zfcp_fsf_req_free(req);
960 req = NULL;
961 out:
962 spin_unlock(&adapter->req_q_lock);
963 return req;
964 }
965
966 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
967 {
968 struct zfcp_adapter *adapter = req->adapter;
969 struct zfcp_send_ct *send_ct = req->data;
970 struct fsf_qtcb_header *header = &req->qtcb->header;
971
972 send_ct->status = -EINVAL;
973
974 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
975 goto skip_fsfstatus;
976
977 switch (header->fsf_status) {
978 case FSF_GOOD:
979 zfcp_san_dbf_event_ct_response(req);
980 send_ct->status = 0;
981 break;
982 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
983 zfcp_fsf_class_not_supp(req);
984 break;
985 case FSF_ADAPTER_STATUS_AVAILABLE:
986 switch (header->fsf_status_qual.word[0]){
987 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
988 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
989 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
990 break;
991 }
992 break;
993 case FSF_ACCESS_DENIED:
994 break;
995 case FSF_PORT_BOXED:
996 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
997 ZFCP_STATUS_FSFREQ_RETRY;
998 break;
999 case FSF_PORT_HANDLE_NOT_VALID:
1000 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1001 case FSF_GENERIC_COMMAND_REJECTED:
1002 case FSF_PAYLOAD_SIZE_MISMATCH:
1003 case FSF_REQUEST_SIZE_TOO_LARGE:
1004 case FSF_RESPONSE_SIZE_TOO_LARGE:
1005 case FSF_SBAL_MISMATCH:
1006 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1007 break;
1008 }
1009
1010 skip_fsfstatus:
1011 if (send_ct->handler)
1012 send_ct->handler(send_ct->handler_data);
1013 }
1014
1015 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1016 struct scatterlist *sg_req,
1017 struct scatterlist *sg_resp, int max_sbals)
1018 {
1019 int bytes;
1020
1021 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1022 sg_req, max_sbals);
1023 if (bytes <= 0)
1024 return -ENOMEM;
1025 req->qtcb->bottom.support.req_buf_length = bytes;
1026 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1027
1028 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1029 sg_resp, max_sbals);
1030 if (bytes <= 0)
1031 return -ENOMEM;
1032 req->qtcb->bottom.support.resp_buf_length = bytes;
1033
1034 return 0;
1035 }
1036
1037 /**
1038 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1039 * @ct: pointer to struct zfcp_send_ct with data for request
1040 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1041 * @erp_action: if non-null the Generic Service request sent within ERP
1042 */
1043 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1044 struct zfcp_erp_action *erp_action)
1045 {
1046 struct zfcp_wka_port *wka_port = ct->wka_port;
1047 struct zfcp_adapter *adapter = wka_port->adapter;
1048 struct zfcp_fsf_req *req;
1049 int ret = -EIO;
1050
1051 spin_lock_bh(&adapter->req_q_lock);
1052 if (zfcp_fsf_req_sbal_get(adapter))
1053 goto out;
1054
1055 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1056 ZFCP_REQ_AUTO_CLEANUP, pool);
1057 if (IS_ERR(req)) {
1058 ret = PTR_ERR(req);
1059 goto out;
1060 }
1061
1062 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1063 FSF_MAX_SBALS_PER_REQ);
1064 if (ret)
1065 goto failed_send;
1066
1067 req->handler = zfcp_fsf_send_ct_handler;
1068 req->qtcb->header.port_handle = wka_port->handle;
1069 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1070 req->qtcb->bottom.support.timeout = ct->timeout;
1071 req->data = ct;
1072
1073 zfcp_san_dbf_event_ct_request(req);
1074
1075 if (erp_action) {
1076 erp_action->fsf_req = req;
1077 req->erp_action = erp_action;
1078 zfcp_fsf_start_erp_timer(req);
1079 } else
1080 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1081
1082 ret = zfcp_fsf_req_send(req);
1083 if (ret)
1084 goto failed_send;
1085
1086 goto out;
1087
1088 failed_send:
1089 zfcp_fsf_req_free(req);
1090 if (erp_action)
1091 erp_action->fsf_req = NULL;
1092 out:
1093 spin_unlock_bh(&adapter->req_q_lock);
1094 return ret;
1095 }
1096
1097 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1098 {
1099 struct zfcp_send_els *send_els = req->data;
1100 struct zfcp_port *port = send_els->port;
1101 struct fsf_qtcb_header *header = &req->qtcb->header;
1102
1103 send_els->status = -EINVAL;
1104
1105 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1106 goto skip_fsfstatus;
1107
1108 switch (header->fsf_status) {
1109 case FSF_GOOD:
1110 zfcp_san_dbf_event_els_response(req);
1111 send_els->status = 0;
1112 break;
1113 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1114 zfcp_fsf_class_not_supp(req);
1115 break;
1116 case FSF_ADAPTER_STATUS_AVAILABLE:
1117 switch (header->fsf_status_qual.word[0]){
1118 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1119 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1120 zfcp_test_link(port);
1121 /*fall through */
1122 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1123 case FSF_SQ_RETRY_IF_POSSIBLE:
1124 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1125 break;
1126 }
1127 break;
1128 case FSF_ELS_COMMAND_REJECTED:
1129 case FSF_PAYLOAD_SIZE_MISMATCH:
1130 case FSF_REQUEST_SIZE_TOO_LARGE:
1131 case FSF_RESPONSE_SIZE_TOO_LARGE:
1132 break;
1133 case FSF_ACCESS_DENIED:
1134 zfcp_fsf_access_denied_port(req, port);
1135 break;
1136 case FSF_SBAL_MISMATCH:
1137 /* should never occure, avoided in zfcp_fsf_send_els */
1138 /* fall through */
1139 default:
1140 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1141 break;
1142 }
1143 skip_fsfstatus:
1144 if (send_els->handler)
1145 send_els->handler(send_els->handler_data);
1146 }
1147
1148 /**
1149 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1150 * @els: pointer to struct zfcp_send_els with data for the command
1151 */
1152 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1153 {
1154 struct zfcp_fsf_req *req;
1155 struct zfcp_adapter *adapter = els->adapter;
1156 struct fsf_qtcb_bottom_support *bottom;
1157 int ret = -EIO;
1158
1159 if (unlikely(!(atomic_read(&els->port->status) &
1160 ZFCP_STATUS_COMMON_UNBLOCKED)))
1161 return -EBUSY;
1162
1163 spin_lock(&adapter->req_q_lock);
1164 if (!zfcp_fsf_sbal_available(adapter))
1165 goto out;
1166 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1167 ZFCP_REQ_AUTO_CLEANUP, NULL);
1168 if (IS_ERR(req)) {
1169 ret = PTR_ERR(req);
1170 goto out;
1171 }
1172
1173 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1174
1175 if (ret)
1176 goto failed_send;
1177
1178 bottom = &req->qtcb->bottom.support;
1179 req->handler = zfcp_fsf_send_els_handler;
1180 bottom->d_id = els->d_id;
1181 bottom->service_class = FSF_CLASS_3;
1182 bottom->timeout = 2 * R_A_TOV;
1183 req->data = els;
1184
1185 zfcp_san_dbf_event_els_request(req);
1186
1187 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1188 ret = zfcp_fsf_req_send(req);
1189 if (ret)
1190 goto failed_send;
1191
1192 goto out;
1193
1194 failed_send:
1195 zfcp_fsf_req_free(req);
1196 out:
1197 spin_unlock(&adapter->req_q_lock);
1198 return ret;
1199 }
1200
1201 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1202 {
1203 struct qdio_buffer_element *sbale;
1204 struct zfcp_fsf_req *req;
1205 struct zfcp_adapter *adapter = erp_action->adapter;
1206 int retval = -EIO;
1207
1208 spin_lock_bh(&adapter->req_q_lock);
1209 if (!zfcp_fsf_sbal_available(adapter))
1210 goto out;
1211 req = zfcp_fsf_req_create(adapter,
1212 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1213 ZFCP_REQ_AUTO_CLEANUP,
1214 adapter->pool.fsf_req_erp);
1215 if (IS_ERR(req)) {
1216 retval = PTR_ERR(req);
1217 goto out;
1218 }
1219
1220 sbale = zfcp_qdio_sbale_req(req);
1221 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1222 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1223
1224 req->qtcb->bottom.config.feature_selection =
1225 FSF_FEATURE_CFDC |
1226 FSF_FEATURE_LUN_SHARING |
1227 FSF_FEATURE_NOTIFICATION_LOST |
1228 FSF_FEATURE_UPDATE_ALERT;
1229 req->erp_action = erp_action;
1230 req->handler = zfcp_fsf_exchange_config_data_handler;
1231 erp_action->fsf_req = req;
1232
1233 zfcp_fsf_start_erp_timer(req);
1234 retval = zfcp_fsf_req_send(req);
1235 if (retval) {
1236 zfcp_fsf_req_free(req);
1237 erp_action->fsf_req = NULL;
1238 }
1239 out:
1240 spin_unlock_bh(&adapter->req_q_lock);
1241 return retval;
1242 }
1243
1244 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1245 struct fsf_qtcb_bottom_config *data)
1246 {
1247 struct qdio_buffer_element *sbale;
1248 struct zfcp_fsf_req *req = NULL;
1249 int retval = -EIO;
1250
1251 spin_lock_bh(&adapter->req_q_lock);
1252 if (zfcp_fsf_req_sbal_get(adapter))
1253 goto out;
1254
1255 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1256 0, NULL);
1257 if (IS_ERR(req)) {
1258 retval = PTR_ERR(req);
1259 goto out;
1260 }
1261
1262 sbale = zfcp_qdio_sbale_req(req);
1263 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1264 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1265 req->handler = zfcp_fsf_exchange_config_data_handler;
1266
1267 req->qtcb->bottom.config.feature_selection =
1268 FSF_FEATURE_CFDC |
1269 FSF_FEATURE_LUN_SHARING |
1270 FSF_FEATURE_NOTIFICATION_LOST |
1271 FSF_FEATURE_UPDATE_ALERT;
1272
1273 if (data)
1274 req->data = data;
1275
1276 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1277 retval = zfcp_fsf_req_send(req);
1278 out:
1279 spin_unlock_bh(&adapter->req_q_lock);
1280 if (!retval)
1281 wait_event(req->completion_wq,
1282 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1283
1284 zfcp_fsf_req_free(req);
1285
1286 return retval;
1287 }
1288
1289 /**
1290 * zfcp_fsf_exchange_port_data - request information about local port
1291 * @erp_action: ERP action for the adapter for which port data is requested
1292 * Returns: 0 on success, error otherwise
1293 */
1294 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1295 {
1296 struct qdio_buffer_element *sbale;
1297 struct zfcp_fsf_req *req;
1298 struct zfcp_adapter *adapter = erp_action->adapter;
1299 int retval = -EIO;
1300
1301 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1302 return -EOPNOTSUPP;
1303
1304 spin_lock_bh(&adapter->req_q_lock);
1305 if (!zfcp_fsf_sbal_available(adapter))
1306 goto out;
1307 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1308 ZFCP_REQ_AUTO_CLEANUP,
1309 adapter->pool.fsf_req_erp);
1310 if (IS_ERR(req)) {
1311 retval = PTR_ERR(req);
1312 goto out;
1313 }
1314
1315 sbale = zfcp_qdio_sbale_req(req);
1316 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1317 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1318
1319 req->handler = zfcp_fsf_exchange_port_data_handler;
1320 req->erp_action = erp_action;
1321 erp_action->fsf_req = req;
1322
1323 zfcp_fsf_start_erp_timer(req);
1324 retval = zfcp_fsf_req_send(req);
1325 if (retval) {
1326 zfcp_fsf_req_free(req);
1327 erp_action->fsf_req = NULL;
1328 }
1329 out:
1330 spin_unlock_bh(&adapter->req_q_lock);
1331 return retval;
1332 }
1333
1334 /**
1335 * zfcp_fsf_exchange_port_data_sync - request information about local port
1336 * @adapter: pointer to struct zfcp_adapter
1337 * @data: pointer to struct fsf_qtcb_bottom_port
1338 * Returns: 0 on success, error otherwise
1339 */
1340 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1341 struct fsf_qtcb_bottom_port *data)
1342 {
1343 struct qdio_buffer_element *sbale;
1344 struct zfcp_fsf_req *req = NULL;
1345 int retval = -EIO;
1346
1347 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1348 return -EOPNOTSUPP;
1349
1350 spin_lock_bh(&adapter->req_q_lock);
1351 if (!zfcp_fsf_sbal_available(adapter))
1352 goto out;
1353
1354 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1355 NULL);
1356 if (IS_ERR(req)) {
1357 retval = PTR_ERR(req);
1358 goto out;
1359 }
1360
1361 if (data)
1362 req->data = data;
1363
1364 sbale = zfcp_qdio_sbale_req(req);
1365 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1366 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1367
1368 req->handler = zfcp_fsf_exchange_port_data_handler;
1369 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1370 retval = zfcp_fsf_req_send(req);
1371 out:
1372 spin_unlock_bh(&adapter->req_q_lock);
1373 if (!retval)
1374 wait_event(req->completion_wq,
1375 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1376 zfcp_fsf_req_free(req);
1377
1378 return retval;
1379 }
1380
1381 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1382 {
1383 struct zfcp_port *port = req->data;
1384 struct fsf_qtcb_header *header = &req->qtcb->header;
1385 struct fsf_plogi *plogi;
1386
1387 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1388 return;
1389
1390 switch (header->fsf_status) {
1391 case FSF_PORT_ALREADY_OPEN:
1392 break;
1393 case FSF_ACCESS_DENIED:
1394 zfcp_fsf_access_denied_port(req, port);
1395 break;
1396 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1397 dev_warn(&req->adapter->ccw_device->dev,
1398 "Not enough FCP adapter resources to open "
1399 "remote port 0x%016Lx\n",
1400 (unsigned long long)port->wwpn);
1401 zfcp_erp_port_failed(port, 31, req);
1402 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1403 break;
1404 case FSF_ADAPTER_STATUS_AVAILABLE:
1405 switch (header->fsf_status_qual.word[0]) {
1406 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1407 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1408 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1409 break;
1410 case FSF_SQ_NO_RETRY_POSSIBLE:
1411 dev_warn(&req->adapter->ccw_device->dev,
1412 "Remote port 0x%016Lx could not be opened\n",
1413 (unsigned long long)port->wwpn);
1414 zfcp_erp_port_failed(port, 32, req);
1415 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1416 break;
1417 }
1418 break;
1419 case FSF_GOOD:
1420 port->handle = header->port_handle;
1421 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1422 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1423 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1424 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1425 &port->status);
1426 /* check whether D_ID has changed during open */
1427 /*
1428 * FIXME: This check is not airtight, as the FCP channel does
1429 * not monitor closures of target port connections caused on
1430 * the remote side. Thus, they might miss out on invalidating
1431 * locally cached WWPNs (and other N_Port parameters) of gone
1432 * target ports. So, our heroic attempt to make things safe
1433 * could be undermined by 'open port' response data tagged with
1434 * obsolete WWPNs. Another reason to monitor potential
1435 * connection closures ourself at least (by interpreting
1436 * incoming ELS' and unsolicited status). It just crosses my
1437 * mind that one should be able to cross-check by means of
1438 * another GID_PN straight after a port has been opened.
1439 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1440 */
1441 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1442 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1443 if (plogi->serv_param.wwpn != port->wwpn)
1444 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1445 &port->status);
1446 else {
1447 port->wwnn = plogi->serv_param.wwnn;
1448 zfcp_fc_plogi_evaluate(port, plogi);
1449 }
1450 }
1451 break;
1452 case FSF_UNKNOWN_OP_SUBTYPE:
1453 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1454 break;
1455 }
1456 }
1457
1458 /**
1459 * zfcp_fsf_open_port - create and send open port request
1460 * @erp_action: pointer to struct zfcp_erp_action
1461 * Returns: 0 on success, error otherwise
1462 */
1463 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1464 {
1465 struct qdio_buffer_element *sbale;
1466 struct zfcp_adapter *adapter = erp_action->adapter;
1467 struct zfcp_fsf_req *req;
1468 int retval = -EIO;
1469
1470 spin_lock_bh(&adapter->req_q_lock);
1471 if (zfcp_fsf_req_sbal_get(adapter))
1472 goto out;
1473
1474 req = zfcp_fsf_req_create(adapter,
1475 FSF_QTCB_OPEN_PORT_WITH_DID,
1476 ZFCP_REQ_AUTO_CLEANUP,
1477 adapter->pool.fsf_req_erp);
1478 if (IS_ERR(req)) {
1479 retval = PTR_ERR(req);
1480 goto out;
1481 }
1482
1483 sbale = zfcp_qdio_sbale_req(req);
1484 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1485 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1486
1487 req->handler = zfcp_fsf_open_port_handler;
1488 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1489 req->data = erp_action->port;
1490 req->erp_action = erp_action;
1491 erp_action->fsf_req = req;
1492
1493 zfcp_fsf_start_erp_timer(req);
1494 retval = zfcp_fsf_req_send(req);
1495 if (retval) {
1496 zfcp_fsf_req_free(req);
1497 erp_action->fsf_req = NULL;
1498 }
1499 out:
1500 spin_unlock_bh(&adapter->req_q_lock);
1501 return retval;
1502 }
1503
1504 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1505 {
1506 struct zfcp_port *port = req->data;
1507
1508 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1509 return;
1510
1511 switch (req->qtcb->header.fsf_status) {
1512 case FSF_PORT_HANDLE_NOT_VALID:
1513 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1514 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1515 break;
1516 case FSF_ADAPTER_STATUS_AVAILABLE:
1517 break;
1518 case FSF_GOOD:
1519 zfcp_erp_modify_port_status(port, 33, req,
1520 ZFCP_STATUS_COMMON_OPEN,
1521 ZFCP_CLEAR);
1522 break;
1523 }
1524 }
1525
1526 /**
1527 * zfcp_fsf_close_port - create and send close port request
1528 * @erp_action: pointer to struct zfcp_erp_action
1529 * Returns: 0 on success, error otherwise
1530 */
1531 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1532 {
1533 struct qdio_buffer_element *sbale;
1534 struct zfcp_adapter *adapter = erp_action->adapter;
1535 struct zfcp_fsf_req *req;
1536 int retval = -EIO;
1537
1538 spin_lock_bh(&adapter->req_q_lock);
1539 if (zfcp_fsf_req_sbal_get(adapter))
1540 goto out;
1541
1542 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1543 ZFCP_REQ_AUTO_CLEANUP,
1544 adapter->pool.fsf_req_erp);
1545 if (IS_ERR(req)) {
1546 retval = PTR_ERR(req);
1547 goto out;
1548 }
1549
1550 sbale = zfcp_qdio_sbale_req(req);
1551 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1552 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1553
1554 req->handler = zfcp_fsf_close_port_handler;
1555 req->data = erp_action->port;
1556 req->erp_action = erp_action;
1557 req->qtcb->header.port_handle = erp_action->port->handle;
1558 erp_action->fsf_req = req;
1559
1560 zfcp_fsf_start_erp_timer(req);
1561 retval = zfcp_fsf_req_send(req);
1562 if (retval) {
1563 zfcp_fsf_req_free(req);
1564 erp_action->fsf_req = NULL;
1565 }
1566 out:
1567 spin_unlock_bh(&adapter->req_q_lock);
1568 return retval;
1569 }
1570
1571 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1572 {
1573 struct zfcp_wka_port *wka_port = req->data;
1574 struct fsf_qtcb_header *header = &req->qtcb->header;
1575
1576 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1577 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1578 goto out;
1579 }
1580
1581 switch (header->fsf_status) {
1582 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1583 dev_warn(&req->adapter->ccw_device->dev,
1584 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1585 case FSF_ADAPTER_STATUS_AVAILABLE:
1586 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1587 case FSF_ACCESS_DENIED:
1588 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1589 break;
1590 case FSF_PORT_ALREADY_OPEN:
1591 case FSF_GOOD:
1592 wka_port->handle = header->port_handle;
1593 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1594 }
1595 out:
1596 wake_up(&wka_port->completion_wq);
1597 }
1598
1599 /**
1600 * zfcp_fsf_open_wka_port - create and send open wka-port request
1601 * @wka_port: pointer to struct zfcp_wka_port
1602 * Returns: 0 on success, error otherwise
1603 */
1604 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1605 {
1606 struct qdio_buffer_element *sbale;
1607 struct zfcp_adapter *adapter = wka_port->adapter;
1608 struct zfcp_fsf_req *req;
1609 int retval = -EIO;
1610
1611 spin_lock_bh(&adapter->req_q_lock);
1612 if (zfcp_fsf_req_sbal_get(adapter))
1613 goto out;
1614
1615 req = zfcp_fsf_req_create(adapter,
1616 FSF_QTCB_OPEN_PORT_WITH_DID,
1617 ZFCP_REQ_AUTO_CLEANUP,
1618 adapter->pool.fsf_req_erp);
1619 if (unlikely(IS_ERR(req))) {
1620 retval = PTR_ERR(req);
1621 goto out;
1622 }
1623
1624 sbale = zfcp_qdio_sbale_req(req);
1625 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1626 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1627
1628 req->handler = zfcp_fsf_open_wka_port_handler;
1629 req->qtcb->bottom.support.d_id = wka_port->d_id;
1630 req->data = wka_port;
1631
1632 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1633 retval = zfcp_fsf_req_send(req);
1634 if (retval)
1635 zfcp_fsf_req_free(req);
1636 out:
1637 spin_unlock_bh(&adapter->req_q_lock);
1638 return retval;
1639 }
1640
1641 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1642 {
1643 struct zfcp_wka_port *wka_port = req->data;
1644
1645 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1646 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1647 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1648 }
1649
1650 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1651 wake_up(&wka_port->completion_wq);
1652 }
1653
1654 /**
1655 * zfcp_fsf_close_wka_port - create and send close wka port request
1656 * @erp_action: pointer to struct zfcp_erp_action
1657 * Returns: 0 on success, error otherwise
1658 */
1659 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1660 {
1661 struct qdio_buffer_element *sbale;
1662 struct zfcp_adapter *adapter = wka_port->adapter;
1663 struct zfcp_fsf_req *req;
1664 int retval = -EIO;
1665
1666 spin_lock_bh(&adapter->req_q_lock);
1667 if (zfcp_fsf_req_sbal_get(adapter))
1668 goto out;
1669
1670 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1671 ZFCP_REQ_AUTO_CLEANUP,
1672 adapter->pool.fsf_req_erp);
1673 if (unlikely(IS_ERR(req))) {
1674 retval = PTR_ERR(req);
1675 goto out;
1676 }
1677
1678 sbale = zfcp_qdio_sbale_req(req);
1679 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1680 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1681
1682 req->handler = zfcp_fsf_close_wka_port_handler;
1683 req->data = wka_port;
1684 req->qtcb->header.port_handle = wka_port->handle;
1685
1686 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1687 retval = zfcp_fsf_req_send(req);
1688 if (retval)
1689 zfcp_fsf_req_free(req);
1690 out:
1691 spin_unlock_bh(&adapter->req_q_lock);
1692 return retval;
1693 }
1694
1695 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1696 {
1697 struct zfcp_port *port = req->data;
1698 struct fsf_qtcb_header *header = &req->qtcb->header;
1699 struct zfcp_unit *unit;
1700
1701 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1702 goto skip_fsfstatus;
1703
1704 switch (header->fsf_status) {
1705 case FSF_PORT_HANDLE_NOT_VALID:
1706 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1707 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1708 break;
1709 case FSF_ACCESS_DENIED:
1710 zfcp_fsf_access_denied_port(req, port);
1711 break;
1712 case FSF_PORT_BOXED:
1713 zfcp_erp_port_boxed(port, 50, req);
1714 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1715 ZFCP_STATUS_FSFREQ_RETRY;
1716 /* can't use generic zfcp_erp_modify_port_status because
1717 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1718 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1719 list_for_each_entry(unit, &port->unit_list_head, list)
1720 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1721 &unit->status);
1722 break;
1723 case FSF_ADAPTER_STATUS_AVAILABLE:
1724 switch (header->fsf_status_qual.word[0]) {
1725 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1726 /* fall through */
1727 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1728 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1729 break;
1730 }
1731 break;
1732 case FSF_GOOD:
1733 /* can't use generic zfcp_erp_modify_port_status because
1734 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1735 */
1736 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1737 list_for_each_entry(unit, &port->unit_list_head, list)
1738 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1739 &unit->status);
1740 break;
1741 }
1742 skip_fsfstatus:
1743 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1744 }
1745
1746 /**
1747 * zfcp_fsf_close_physical_port - close physical port
1748 * @erp_action: pointer to struct zfcp_erp_action
1749 * Returns: 0 on success
1750 */
1751 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1752 {
1753 struct qdio_buffer_element *sbale;
1754 struct zfcp_adapter *adapter = erp_action->adapter;
1755 struct zfcp_fsf_req *req;
1756 int retval = -EIO;
1757
1758 spin_lock_bh(&adapter->req_q_lock);
1759 if (zfcp_fsf_req_sbal_get(adapter))
1760 goto out;
1761
1762 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1763 ZFCP_REQ_AUTO_CLEANUP,
1764 adapter->pool.fsf_req_erp);
1765 if (IS_ERR(req)) {
1766 retval = PTR_ERR(req);
1767 goto out;
1768 }
1769
1770 sbale = zfcp_qdio_sbale_req(req);
1771 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1772 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1773
1774 req->data = erp_action->port;
1775 req->qtcb->header.port_handle = erp_action->port->handle;
1776 req->erp_action = erp_action;
1777 req->handler = zfcp_fsf_close_physical_port_handler;
1778 erp_action->fsf_req = req;
1779 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1780 &erp_action->port->status);
1781
1782 zfcp_fsf_start_erp_timer(req);
1783 retval = zfcp_fsf_req_send(req);
1784 if (retval) {
1785 zfcp_fsf_req_free(req);
1786 erp_action->fsf_req = NULL;
1787 }
1788 out:
1789 spin_unlock_bh(&adapter->req_q_lock);
1790 return retval;
1791 }
1792
1793 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1794 {
1795 struct zfcp_adapter *adapter = req->adapter;
1796 struct zfcp_unit *unit = req->data;
1797 struct fsf_qtcb_header *header = &req->qtcb->header;
1798 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1799 struct fsf_queue_designator *queue_designator =
1800 &header->fsf_status_qual.fsf_queue_designator;
1801 int exclusive, readwrite;
1802
1803 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1804 return;
1805
1806 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1807 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1808 ZFCP_STATUS_UNIT_SHARED |
1809 ZFCP_STATUS_UNIT_READONLY,
1810 &unit->status);
1811
1812 switch (header->fsf_status) {
1813
1814 case FSF_PORT_HANDLE_NOT_VALID:
1815 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1816 /* fall through */
1817 case FSF_LUN_ALREADY_OPEN:
1818 break;
1819 case FSF_ACCESS_DENIED:
1820 zfcp_fsf_access_denied_unit(req, unit);
1821 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1822 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1823 break;
1824 case FSF_PORT_BOXED:
1825 zfcp_erp_port_boxed(unit->port, 51, req);
1826 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1827 ZFCP_STATUS_FSFREQ_RETRY;
1828 break;
1829 case FSF_LUN_SHARING_VIOLATION:
1830 if (header->fsf_status_qual.word[0])
1831 dev_warn(&adapter->ccw_device->dev,
1832 "LUN 0x%Lx on port 0x%Lx is already in "
1833 "use by CSS%d, MIF Image ID %x\n",
1834 (unsigned long long)unit->fcp_lun,
1835 (unsigned long long)unit->port->wwpn,
1836 queue_designator->cssid,
1837 queue_designator->hla);
1838 else
1839 zfcp_act_eval_err(adapter,
1840 header->fsf_status_qual.word[2]);
1841 zfcp_erp_unit_access_denied(unit, 60, req);
1842 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1843 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1844 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1845 break;
1846 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1847 dev_warn(&adapter->ccw_device->dev,
1848 "No handle is available for LUN "
1849 "0x%016Lx on port 0x%016Lx\n",
1850 (unsigned long long)unit->fcp_lun,
1851 (unsigned long long)unit->port->wwpn);
1852 zfcp_erp_unit_failed(unit, 34, req);
1853 /* fall through */
1854 case FSF_INVALID_COMMAND_OPTION:
1855 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1856 break;
1857 case FSF_ADAPTER_STATUS_AVAILABLE:
1858 switch (header->fsf_status_qual.word[0]) {
1859 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1860 zfcp_test_link(unit->port);
1861 /* fall through */
1862 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1863 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1864 break;
1865 }
1866 break;
1867
1868 case FSF_GOOD:
1869 unit->handle = header->lun_handle;
1870 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1871
1872 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1873 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1874 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1875 exclusive = (bottom->lun_access_info &
1876 FSF_UNIT_ACCESS_EXCLUSIVE);
1877 readwrite = (bottom->lun_access_info &
1878 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1879
1880 if (!exclusive)
1881 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1882 &unit->status);
1883
1884 if (!readwrite) {
1885 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1886 &unit->status);
1887 dev_info(&adapter->ccw_device->dev,
1888 "SCSI device at LUN 0x%016Lx on port "
1889 "0x%016Lx opened read-only\n",
1890 (unsigned long long)unit->fcp_lun,
1891 (unsigned long long)unit->port->wwpn);
1892 }
1893
1894 if (exclusive && !readwrite) {
1895 dev_err(&adapter->ccw_device->dev,
1896 "Exclusive read-only access not "
1897 "supported (unit 0x%016Lx, "
1898 "port 0x%016Lx)\n",
1899 (unsigned long long)unit->fcp_lun,
1900 (unsigned long long)unit->port->wwpn);
1901 zfcp_erp_unit_failed(unit, 35, req);
1902 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1903 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1904 } else if (!exclusive && readwrite) {
1905 dev_err(&adapter->ccw_device->dev,
1906 "Shared read-write access not "
1907 "supported (unit 0x%016Lx, port "
1908 "0x%016Lx\n)",
1909 (unsigned long long)unit->fcp_lun,
1910 (unsigned long long)unit->port->wwpn);
1911 zfcp_erp_unit_failed(unit, 36, req);
1912 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1913 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1914 }
1915 }
1916 break;
1917 }
1918 }
1919
1920 /**
1921 * zfcp_fsf_open_unit - open unit
1922 * @erp_action: pointer to struct zfcp_erp_action
1923 * Returns: 0 on success, error otherwise
1924 */
1925 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1926 {
1927 struct qdio_buffer_element *sbale;
1928 struct zfcp_adapter *adapter = erp_action->adapter;
1929 struct zfcp_fsf_req *req;
1930 int retval = -EIO;
1931
1932 spin_lock_bh(&adapter->req_q_lock);
1933 if (zfcp_fsf_req_sbal_get(adapter))
1934 goto out;
1935
1936 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1937 ZFCP_REQ_AUTO_CLEANUP,
1938 adapter->pool.fsf_req_erp);
1939 if (IS_ERR(req)) {
1940 retval = PTR_ERR(req);
1941 goto out;
1942 }
1943
1944 sbale = zfcp_qdio_sbale_req(req);
1945 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1946 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1947
1948 req->qtcb->header.port_handle = erp_action->port->handle;
1949 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1950 req->handler = zfcp_fsf_open_unit_handler;
1951 req->data = erp_action->unit;
1952 req->erp_action = erp_action;
1953 erp_action->fsf_req = req;
1954
1955 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1956 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1957
1958 zfcp_fsf_start_erp_timer(req);
1959 retval = zfcp_fsf_req_send(req);
1960 if (retval) {
1961 zfcp_fsf_req_free(req);
1962 erp_action->fsf_req = NULL;
1963 }
1964 out:
1965 spin_unlock_bh(&adapter->req_q_lock);
1966 return retval;
1967 }
1968
1969 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1970 {
1971 struct zfcp_unit *unit = req->data;
1972
1973 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1974 return;
1975
1976 switch (req->qtcb->header.fsf_status) {
1977 case FSF_PORT_HANDLE_NOT_VALID:
1978 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1979 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1980 break;
1981 case FSF_LUN_HANDLE_NOT_VALID:
1982 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1983 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1984 break;
1985 case FSF_PORT_BOXED:
1986 zfcp_erp_port_boxed(unit->port, 52, req);
1987 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1988 ZFCP_STATUS_FSFREQ_RETRY;
1989 break;
1990 case FSF_ADAPTER_STATUS_AVAILABLE:
1991 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1992 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1993 zfcp_test_link(unit->port);
1994 /* fall through */
1995 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1996 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1997 break;
1998 }
1999 break;
2000 case FSF_GOOD:
2001 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2002 break;
2003 }
2004 }
2005
2006 /**
2007 * zfcp_fsf_close_unit - close zfcp unit
2008 * @erp_action: pointer to struct zfcp_unit
2009 * Returns: 0 on success, error otherwise
2010 */
2011 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2012 {
2013 struct qdio_buffer_element *sbale;
2014 struct zfcp_adapter *adapter = erp_action->adapter;
2015 struct zfcp_fsf_req *req;
2016 int retval = -EIO;
2017
2018 spin_lock_bh(&adapter->req_q_lock);
2019 if (zfcp_fsf_req_sbal_get(adapter))
2020 goto out;
2021 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2022 ZFCP_REQ_AUTO_CLEANUP,
2023 adapter->pool.fsf_req_erp);
2024 if (IS_ERR(req)) {
2025 retval = PTR_ERR(req);
2026 goto out;
2027 }
2028
2029 sbale = zfcp_qdio_sbale_req(req);
2030 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2031 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2032
2033 req->qtcb->header.port_handle = erp_action->port->handle;
2034 req->qtcb->header.lun_handle = erp_action->unit->handle;
2035 req->handler = zfcp_fsf_close_unit_handler;
2036 req->data = erp_action->unit;
2037 req->erp_action = erp_action;
2038 erp_action->fsf_req = req;
2039
2040 zfcp_fsf_start_erp_timer(req);
2041 retval = zfcp_fsf_req_send(req);
2042 if (retval) {
2043 zfcp_fsf_req_free(req);
2044 erp_action->fsf_req = NULL;
2045 }
2046 out:
2047 spin_unlock_bh(&adapter->req_q_lock);
2048 return retval;
2049 }
2050
2051 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2052 {
2053 lat_rec->sum += lat;
2054 lat_rec->min = min(lat_rec->min, lat);
2055 lat_rec->max = max(lat_rec->max, lat);
2056 }
2057
2058 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2059 {
2060 struct fsf_qual_latency_info *lat_inf;
2061 struct latency_cont *lat;
2062 struct zfcp_unit *unit = req->unit;
2063 unsigned long flags;
2064
2065 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2066
2067 switch (req->qtcb->bottom.io.data_direction) {
2068 case FSF_DATADIR_READ:
2069 lat = &unit->latencies.read;
2070 break;
2071 case FSF_DATADIR_WRITE:
2072 lat = &unit->latencies.write;
2073 break;
2074 case FSF_DATADIR_CMND:
2075 lat = &unit->latencies.cmd;
2076 break;
2077 default:
2078 return;
2079 }
2080
2081 spin_lock_irqsave(&unit->latencies.lock, flags);
2082 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2083 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2084 lat->counter++;
2085 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2086 }
2087
2088 #ifdef CONFIG_BLK_DEV_IO_TRACE
2089 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2090 {
2091 struct fsf_qual_latency_info *lat_inf;
2092 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2093 struct request *req = scsi_cmnd->request;
2094 struct zfcp_blk_drv_data trace;
2095 int ticks = fsf_req->adapter->timer_ticks;
2096
2097 trace.flags = 0;
2098 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2099 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2100 trace.flags |= ZFCP_BLK_LAT_VALID;
2101 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2102 trace.channel_lat = lat_inf->channel_lat * ticks;
2103 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2104 }
2105 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2106 trace.flags |= ZFCP_BLK_REQ_ERROR;
2107 trace.inb_usage = fsf_req->qdio_inb_usage;
2108 trace.outb_usage = fsf_req->qdio_outb_usage;
2109
2110 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2111 }
2112 #else
2113 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2114 {
2115 }
2116 #endif
2117
2118 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2119 {
2120 struct scsi_cmnd *scpnt = req->data;
2121 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2122 &(req->qtcb->bottom.io.fcp_rsp);
2123 u32 sns_len;
2124 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2125 unsigned long flags;
2126
2127 if (unlikely(!scpnt))
2128 return;
2129
2130 read_lock_irqsave(&req->adapter->abort_lock, flags);
2131
2132 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2133 set_host_byte(scpnt, DID_SOFT_ERROR);
2134 set_driver_byte(scpnt, SUGGEST_RETRY);
2135 goto skip_fsfstatus;
2136 }
2137
2138 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2139 set_host_byte(scpnt, DID_ERROR);
2140 goto skip_fsfstatus;
2141 }
2142
2143 set_msg_byte(scpnt, COMMAND_COMPLETE);
2144
2145 scpnt->result |= fcp_rsp_iu->scsi_status;
2146
2147 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2148 zfcp_fsf_req_latency(req);
2149
2150 zfcp_fsf_trace_latency(req);
2151
2152 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2153 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2154 set_host_byte(scpnt, DID_OK);
2155 else {
2156 set_host_byte(scpnt, DID_ERROR);
2157 goto skip_fsfstatus;
2158 }
2159 }
2160
2161 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2162 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2163 fcp_rsp_iu->fcp_rsp_len;
2164 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2165 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2166
2167 memcpy(scpnt->sense_buffer,
2168 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2169 }
2170
2171 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2172 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2173 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2174 scpnt->underflow)
2175 set_host_byte(scpnt, DID_ERROR);
2176 }
2177 skip_fsfstatus:
2178 if (scpnt->result != 0)
2179 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2180 else if (scpnt->retries > 0)
2181 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2182 else
2183 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2184
2185 scpnt->host_scribble = NULL;
2186 (scpnt->scsi_done) (scpnt);
2187 /*
2188 * We must hold this lock until scsi_done has been called.
2189 * Otherwise we may call scsi_done after abort regarding this
2190 * command has completed.
2191 * Note: scsi_done must not block!
2192 */
2193 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2194 }
2195
2196 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2197 {
2198 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2199 &(req->qtcb->bottom.io.fcp_rsp);
2200 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2201
2202 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2203 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2204 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2205 }
2206
2207
2208 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2209 {
2210 struct zfcp_unit *unit;
2211 struct fsf_qtcb_header *header = &req->qtcb->header;
2212
2213 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2214 unit = req->data;
2215 else
2216 unit = req->unit;
2217
2218 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2219 goto skip_fsfstatus;
2220
2221 switch (header->fsf_status) {
2222 case FSF_HANDLE_MISMATCH:
2223 case FSF_PORT_HANDLE_NOT_VALID:
2224 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2225 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2226 break;
2227 case FSF_FCPLUN_NOT_VALID:
2228 case FSF_LUN_HANDLE_NOT_VALID:
2229 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2230 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2231 break;
2232 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2233 zfcp_fsf_class_not_supp(req);
2234 break;
2235 case FSF_ACCESS_DENIED:
2236 zfcp_fsf_access_denied_unit(req, unit);
2237 break;
2238 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2239 dev_err(&req->adapter->ccw_device->dev,
2240 "Incorrect direction %d, unit 0x%016Lx on port "
2241 "0x%016Lx closed\n",
2242 req->qtcb->bottom.io.data_direction,
2243 (unsigned long long)unit->fcp_lun,
2244 (unsigned long long)unit->port->wwpn);
2245 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2246 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2247 break;
2248 case FSF_CMND_LENGTH_NOT_VALID:
2249 dev_err(&req->adapter->ccw_device->dev,
2250 "Incorrect CDB length %d, unit 0x%016Lx on "
2251 "port 0x%016Lx closed\n",
2252 req->qtcb->bottom.io.fcp_cmnd_length,
2253 (unsigned long long)unit->fcp_lun,
2254 (unsigned long long)unit->port->wwpn);
2255 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2256 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2257 break;
2258 case FSF_PORT_BOXED:
2259 zfcp_erp_port_boxed(unit->port, 53, req);
2260 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2261 ZFCP_STATUS_FSFREQ_RETRY;
2262 break;
2263 case FSF_LUN_BOXED:
2264 zfcp_erp_unit_boxed(unit, 54, req);
2265 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2266 ZFCP_STATUS_FSFREQ_RETRY;
2267 break;
2268 case FSF_ADAPTER_STATUS_AVAILABLE:
2269 if (header->fsf_status_qual.word[0] ==
2270 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2271 zfcp_test_link(unit->port);
2272 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2273 break;
2274 }
2275 skip_fsfstatus:
2276 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2277 zfcp_fsf_send_fcp_ctm_handler(req);
2278 else {
2279 zfcp_fsf_send_fcp_command_task_handler(req);
2280 req->unit = NULL;
2281 zfcp_unit_put(unit);
2282 }
2283 }
2284
2285 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2286 {
2287 u32 *fcp_dl_ptr;
2288
2289 /*
2290 * fcp_dl_addr = start address of fcp_cmnd structure +
2291 * size of fixed part + size of dynamically sized add_dcp_cdb field
2292 * SEE FCP-2 documentation
2293 */
2294 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2295 (fcp_cmd->add_fcp_cdb_length << 2));
2296 *fcp_dl_ptr = fcp_dl;
2297 }
2298
2299 /**
2300 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2301 * @adapter: adapter where scsi command is issued
2302 * @unit: unit where command is sent to
2303 * @scsi_cmnd: scsi command to be sent
2304 * @timer: timer to be started when request is initiated
2305 * @req_flags: flags for fsf_request
2306 */
2307 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2308 struct zfcp_unit *unit,
2309 struct scsi_cmnd *scsi_cmnd,
2310 int use_timer, int req_flags)
2311 {
2312 struct zfcp_fsf_req *req;
2313 struct fcp_cmnd_iu *fcp_cmnd_iu;
2314 unsigned int sbtype;
2315 int real_bytes, retval = -EIO;
2316
2317 if (unlikely(!(atomic_read(&unit->status) &
2318 ZFCP_STATUS_COMMON_UNBLOCKED)))
2319 return -EBUSY;
2320
2321 spin_lock(&adapter->req_q_lock);
2322 if (!zfcp_fsf_sbal_available(adapter))
2323 goto out;
2324 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2325 adapter->pool.fsf_req_scsi);
2326 if (IS_ERR(req)) {
2327 retval = PTR_ERR(req);
2328 goto out;
2329 }
2330
2331 zfcp_unit_get(unit);
2332 req->unit = unit;
2333 req->data = scsi_cmnd;
2334 req->handler = zfcp_fsf_send_fcp_command_handler;
2335 req->qtcb->header.lun_handle = unit->handle;
2336 req->qtcb->header.port_handle = unit->port->handle;
2337 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2338
2339 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2340
2341 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2342 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2343 /*
2344 * set depending on data direction:
2345 * data direction bits in SBALE (SB Type)
2346 * data direction bits in QTCB
2347 * data direction bits in FCP_CMND IU
2348 */
2349 switch (scsi_cmnd->sc_data_direction) {
2350 case DMA_NONE:
2351 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2352 sbtype = SBAL_FLAGS0_TYPE_READ;
2353 break;
2354 case DMA_FROM_DEVICE:
2355 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2356 sbtype = SBAL_FLAGS0_TYPE_READ;
2357 fcp_cmnd_iu->rddata = 1;
2358 break;
2359 case DMA_TO_DEVICE:
2360 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2361 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2362 fcp_cmnd_iu->wddata = 1;
2363 break;
2364 case DMA_BIDIRECTIONAL:
2365 default:
2366 retval = -EIO;
2367 goto failed_scsi_cmnd;
2368 }
2369
2370 if (likely((scsi_cmnd->device->simple_tags) ||
2371 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2372 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2373 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2374 else
2375 fcp_cmnd_iu->task_attribute = UNTAGGED;
2376
2377 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2378 fcp_cmnd_iu->add_fcp_cdb_length =
2379 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2380
2381 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2382
2383 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2384 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2385
2386 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2387 scsi_sglist(scsi_cmnd),
2388 FSF_MAX_SBALS_PER_REQ);
2389 if (unlikely(real_bytes < 0)) {
2390 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2391 retval = -EIO;
2392 else {
2393 dev_err(&adapter->ccw_device->dev,
2394 "Oversize data package, unit 0x%016Lx "
2395 "on port 0x%016Lx closed\n",
2396 (unsigned long long)unit->fcp_lun,
2397 (unsigned long long)unit->port->wwpn);
2398 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2399 retval = -EINVAL;
2400 }
2401 goto failed_scsi_cmnd;
2402 }
2403
2404 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2405
2406 if (use_timer)
2407 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2408
2409 retval = zfcp_fsf_req_send(req);
2410 if (unlikely(retval))
2411 goto failed_scsi_cmnd;
2412
2413 goto out;
2414
2415 failed_scsi_cmnd:
2416 zfcp_unit_put(unit);
2417 zfcp_fsf_req_free(req);
2418 scsi_cmnd->host_scribble = NULL;
2419 out:
2420 spin_unlock(&adapter->req_q_lock);
2421 return retval;
2422 }
2423
2424 /**
2425 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2426 * @adapter: pointer to struct zfcp-adapter
2427 * @unit: pointer to struct zfcp_unit
2428 * @tm_flags: unsigned byte for task management flags
2429 * @req_flags: int request flags
2430 * Returns: on success pointer to struct fsf_req, NULL otherwise
2431 */
2432 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2433 struct zfcp_unit *unit,
2434 u8 tm_flags, int req_flags)
2435 {
2436 struct qdio_buffer_element *sbale;
2437 struct zfcp_fsf_req *req = NULL;
2438 struct fcp_cmnd_iu *fcp_cmnd_iu;
2439
2440 if (unlikely(!(atomic_read(&unit->status) &
2441 ZFCP_STATUS_COMMON_UNBLOCKED)))
2442 return NULL;
2443
2444 spin_lock(&adapter->req_q_lock);
2445 if (!zfcp_fsf_sbal_available(adapter))
2446 goto out;
2447 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2448 adapter->pool.fsf_req_scsi);
2449 if (IS_ERR(req))
2450 goto out;
2451
2452 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2453 req->data = unit;
2454 req->handler = zfcp_fsf_send_fcp_command_handler;
2455 req->qtcb->header.lun_handle = unit->handle;
2456 req->qtcb->header.port_handle = unit->port->handle;
2457 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2458 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2459 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2460 sizeof(u32);
2461
2462 sbale = zfcp_qdio_sbale_req(req);
2463 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2464 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2465
2466 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2467 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2468 fcp_cmnd_iu->task_management_flags = tm_flags;
2469
2470 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2471 if (!zfcp_fsf_req_send(req))
2472 goto out;
2473
2474 zfcp_fsf_req_free(req);
2475 req = NULL;
2476 out:
2477 spin_unlock(&adapter->req_q_lock);
2478 return req;
2479 }
2480
2481 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2482 {
2483 if (req->qtcb->header.fsf_status != FSF_GOOD)
2484 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2485 }
2486
2487 /**
2488 * zfcp_fsf_control_file - control file upload/download
2489 * @adapter: pointer to struct zfcp_adapter
2490 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2491 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2492 */
2493 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2494 struct zfcp_fsf_cfdc *fsf_cfdc)
2495 {
2496 struct qdio_buffer_element *sbale;
2497 struct zfcp_fsf_req *req = NULL;
2498 struct fsf_qtcb_bottom_support *bottom;
2499 int direction, retval = -EIO, bytes;
2500
2501 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2502 return ERR_PTR(-EOPNOTSUPP);
2503
2504 switch (fsf_cfdc->command) {
2505 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2506 direction = SBAL_FLAGS0_TYPE_WRITE;
2507 break;
2508 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2509 direction = SBAL_FLAGS0_TYPE_READ;
2510 break;
2511 default:
2512 return ERR_PTR(-EINVAL);
2513 }
2514
2515 spin_lock_bh(&adapter->req_q_lock);
2516 if (zfcp_fsf_req_sbal_get(adapter))
2517 goto out;
2518
2519 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2520 if (IS_ERR(req)) {
2521 retval = -EPERM;
2522 goto out;
2523 }
2524
2525 req->handler = zfcp_fsf_control_file_handler;
2526
2527 sbale = zfcp_qdio_sbale_req(req);
2528 sbale[0].flags |= direction;
2529
2530 bottom = &req->qtcb->bottom.support;
2531 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2532 bottom->option = fsf_cfdc->option;
2533
2534 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2535 FSF_MAX_SBALS_PER_REQ);
2536 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2537 retval = -ENOMEM;
2538 zfcp_fsf_req_free(req);
2539 goto out;
2540 }
2541
2542 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2543 retval = zfcp_fsf_req_send(req);
2544 out:
2545 spin_unlock_bh(&adapter->req_q_lock);
2546
2547 if (!retval) {
2548 wait_event(req->completion_wq,
2549 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2550 return req;
2551 }
2552 return ERR_PTR(retval);
2553 }
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