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[SCSI] zfcp: eliminate race between validation and locking
[linux-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
blobdc0367690405e864538d33b0d96f088b0047e80a
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 req->pool = pool;
687 return req;
688 }
689
690 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
691 {
692 struct zfcp_fsf_req_qtcb *qtcb;
693
694 if (likely(pool))
695 qtcb = mempool_alloc(pool, GFP_ATOMIC);
696 else
697 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
698 GFP_ATOMIC);
699 if (unlikely(!qtcb))
700 return NULL;
701
702 memset(qtcb, 0, sizeof(*qtcb));
703 qtcb->fsf_req.qtcb = &qtcb->qtcb;
704 qtcb->fsf_req.pool = pool;
705
706 return &qtcb->fsf_req;
707 }
708
709 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
710 u32 fsf_cmd, int req_flags,
711 mempool_t *pool)
712 {
713 struct qdio_buffer_element *sbale;
714
715 struct zfcp_fsf_req *req;
716 struct zfcp_qdio_queue *req_q = &adapter->req_q;
717
718 if (req_flags & ZFCP_REQ_NO_QTCB)
719 req = zfcp_fsf_alloc_noqtcb(pool);
720 else
721 req = zfcp_fsf_alloc_qtcb(pool);
722
723 if (unlikely(!req))
724 return ERR_PTR(-EIO);
725
726 if (adapter->req_no == 0)
727 adapter->req_no++;
728
729 INIT_LIST_HEAD(&req->list);
730 init_timer(&req->timer);
731 init_waitqueue_head(&req->completion_wq);
732
733 req->adapter = adapter;
734 req->fsf_command = fsf_cmd;
735 req->req_id = adapter->req_no++;
736 req->sbal_number = 1;
737 req->sbal_first = req_q->first;
738 req->sbal_last = req_q->first;
739 req->sbale_curr = 1;
740
741 sbale = zfcp_qdio_sbale_req(req);
742 sbale[0].addr = (void *) req->req_id;
743 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
744
745 if (likely(req->qtcb)) {
746 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
747 req->qtcb->prefix.req_id = req->req_id;
748 req->qtcb->prefix.ulp_info = 26;
749 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
750 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
751 req->qtcb->header.req_handle = req->req_id;
752 req->qtcb->header.fsf_command = req->fsf_command;
753 req->seq_no = adapter->fsf_req_seq_no;
754 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
755 sbale[1].addr = (void *) req->qtcb;
756 sbale[1].length = sizeof(struct fsf_qtcb);
757 }
758
759 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
760 zfcp_fsf_req_free(req);
761 return ERR_PTR(-EIO);
762 }
763
764 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
765 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
766
767 return req;
768 }
769
770 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
771 {
772 struct zfcp_adapter *adapter = req->adapter;
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(&adapter->req_q.count);
783 req->issued = get_clock();
784 if (zfcp_qdio_send(req)) {
785 del_timer(&req->timer);
786 spin_lock_irqsave(&adapter->req_list_lock, flags);
787 /* lookup request again, list might have changed */
788 if (zfcp_reqlist_find_safe(adapter, req))
789 zfcp_reqlist_remove(adapter, req);
790 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
791 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
792 return -EIO;
793 }
794
795 /* Don't increase for unsolicited status */
796 if (req->qtcb)
797 adapter->fsf_req_seq_no++;
798
799 return 0;
800 }
801
802 /**
803 * zfcp_fsf_status_read - send status read request
804 * @adapter: pointer to struct zfcp_adapter
805 * @req_flags: request flags
806 * Returns: 0 on success, ERROR otherwise
807 */
808 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
809 {
810 struct zfcp_fsf_req *req;
811 struct fsf_status_read_buffer *sr_buf;
812 struct qdio_buffer_element *sbale;
813 int retval = -EIO;
814
815 spin_lock_bh(&adapter->req_q_lock);
816 if (zfcp_fsf_req_sbal_get(adapter))
817 goto out;
818
819 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
820 ZFCP_REQ_NO_QTCB,
821 adapter->pool.fsf_req_status_read);
822 if (IS_ERR(req)) {
823 retval = PTR_ERR(req);
824 goto out;
825 }
826
827 sbale = zfcp_qdio_sbale_req(req);
828 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
829 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
830 req->sbale_curr = 2;
831
832 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
833 if (!sr_buf) {
834 retval = -ENOMEM;
835 goto failed_buf;
836 }
837 memset(sr_buf, 0, sizeof(*sr_buf));
838 req->data = sr_buf;
839 sbale = zfcp_qdio_sbale_curr(req);
840 sbale->addr = (void *) sr_buf;
841 sbale->length = sizeof(*sr_buf);
842
843 retval = zfcp_fsf_req_send(req);
844 if (retval)
845 goto failed_req_send;
846
847 goto out;
848
849 failed_req_send:
850 mempool_free(sr_buf, adapter->pool.data_status_read);
851 failed_buf:
852 zfcp_fsf_req_free(req);
853 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
854 out:
855 spin_unlock_bh(&adapter->req_q_lock);
856 return retval;
857 }
858
859 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
860 {
861 struct zfcp_unit *unit = req->data;
862 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
863
864 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
865 return;
866
867 switch (req->qtcb->header.fsf_status) {
868 case FSF_PORT_HANDLE_NOT_VALID:
869 if (fsq->word[0] == fsq->word[1]) {
870 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
871 req);
872 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
873 }
874 break;
875 case FSF_LUN_HANDLE_NOT_VALID:
876 if (fsq->word[0] == fsq->word[1]) {
877 zfcp_erp_port_reopen(unit->port, 0, 105, req);
878 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
879 }
880 break;
881 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
882 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
883 break;
884 case FSF_PORT_BOXED:
885 zfcp_erp_port_boxed(unit->port, 47, req);
886 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
887 ZFCP_STATUS_FSFREQ_RETRY;
888 break;
889 case FSF_LUN_BOXED:
890 zfcp_erp_unit_boxed(unit, 48, req);
891 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
892 ZFCP_STATUS_FSFREQ_RETRY;
893 break;
894 case FSF_ADAPTER_STATUS_AVAILABLE:
895 switch (fsq->word[0]) {
896 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
897 zfcp_test_link(unit->port);
898 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
899 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
900 break;
901 }
902 break;
903 case FSF_GOOD:
904 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
905 break;
906 }
907 }
908
909 /**
910 * zfcp_fsf_abort_fcp_command - abort running SCSI command
911 * @old_req_id: unsigned long
912 * @adapter: pointer to struct zfcp_adapter
913 * @unit: pointer to struct zfcp_unit
914 * @req_flags: integer specifying the request flags
915 * Returns: pointer to struct zfcp_fsf_req
916 *
917 * FIXME(design): should be watched by a timeout !!!
918 */
919
920 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
921 struct zfcp_adapter *adapter,
922 struct zfcp_unit *unit,
923 int req_flags)
924 {
925 struct qdio_buffer_element *sbale;
926 struct zfcp_fsf_req *req = NULL;
927
928 spin_lock(&adapter->req_q_lock);
929 if (!zfcp_fsf_sbal_available(adapter))
930 goto out;
931 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
932 req_flags, adapter->pool.fsf_req_abort);
933 if (IS_ERR(req)) {
934 req = NULL;
935 goto out;
936 }
937
938 if (unlikely(!(atomic_read(&unit->status) &
939 ZFCP_STATUS_COMMON_UNBLOCKED)))
940 goto out_error_free;
941
942 sbale = zfcp_qdio_sbale_req(req);
943 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
944 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
945
946 req->data = unit;
947 req->handler = zfcp_fsf_abort_fcp_command_handler;
948 req->qtcb->header.lun_handle = unit->handle;
949 req->qtcb->header.port_handle = unit->port->handle;
950 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
951
952 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
953 if (!zfcp_fsf_req_send(req))
954 goto out;
955
956 out_error_free:
957 zfcp_fsf_req_free(req);
958 req = NULL;
959 out:
960 spin_unlock(&adapter->req_q_lock);
961 return req;
962 }
963
964 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
965 {
966 struct zfcp_adapter *adapter = req->adapter;
967 struct zfcp_send_ct *send_ct = req->data;
968 struct fsf_qtcb_header *header = &req->qtcb->header;
969
970 send_ct->status = -EINVAL;
971
972 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
973 goto skip_fsfstatus;
974
975 switch (header->fsf_status) {
976 case FSF_GOOD:
977 zfcp_san_dbf_event_ct_response(req);
978 send_ct->status = 0;
979 break;
980 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
981 zfcp_fsf_class_not_supp(req);
982 break;
983 case FSF_ADAPTER_STATUS_AVAILABLE:
984 switch (header->fsf_status_qual.word[0]){
985 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
986 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
987 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
988 break;
989 }
990 break;
991 case FSF_ACCESS_DENIED:
992 break;
993 case FSF_PORT_BOXED:
994 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
995 ZFCP_STATUS_FSFREQ_RETRY;
996 break;
997 case FSF_PORT_HANDLE_NOT_VALID:
998 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
999 case FSF_GENERIC_COMMAND_REJECTED:
1000 case FSF_PAYLOAD_SIZE_MISMATCH:
1001 case FSF_REQUEST_SIZE_TOO_LARGE:
1002 case FSF_RESPONSE_SIZE_TOO_LARGE:
1003 case FSF_SBAL_MISMATCH:
1004 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1005 break;
1006 }
1007
1008 skip_fsfstatus:
1009 if (send_ct->handler)
1010 send_ct->handler(send_ct->handler_data);
1011 }
1012
1013 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1014 struct scatterlist *sg_req,
1015 struct scatterlist *sg_resp, int max_sbals)
1016 {
1017 int bytes;
1018
1019 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1020 sg_req, max_sbals);
1021 if (bytes <= 0)
1022 return -ENOMEM;
1023 req->qtcb->bottom.support.req_buf_length = bytes;
1024 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1025
1026 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1027 sg_resp, max_sbals);
1028 if (bytes <= 0)
1029 return -ENOMEM;
1030 req->qtcb->bottom.support.resp_buf_length = bytes;
1031
1032 return 0;
1033 }
1034
1035 /**
1036 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1037 * @ct: pointer to struct zfcp_send_ct with data for request
1038 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1039 * @erp_action: if non-null the Generic Service request sent within ERP
1040 */
1041 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1042 struct zfcp_erp_action *erp_action)
1043 {
1044 struct zfcp_wka_port *wka_port = ct->wka_port;
1045 struct zfcp_adapter *adapter = wka_port->adapter;
1046 struct zfcp_fsf_req *req;
1047 int ret = -EIO;
1048
1049 spin_lock_bh(&adapter->req_q_lock);
1050 if (zfcp_fsf_req_sbal_get(adapter))
1051 goto out;
1052
1053 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1054 ZFCP_REQ_AUTO_CLEANUP, pool);
1055 if (IS_ERR(req)) {
1056 ret = PTR_ERR(req);
1057 goto out;
1058 }
1059
1060 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1061 FSF_MAX_SBALS_PER_REQ);
1062 if (ret)
1063 goto failed_send;
1064
1065 req->handler = zfcp_fsf_send_ct_handler;
1066 req->qtcb->header.port_handle = wka_port->handle;
1067 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1068 req->qtcb->bottom.support.timeout = ct->timeout;
1069 req->data = ct;
1070
1071 zfcp_san_dbf_event_ct_request(req);
1072
1073 if (erp_action) {
1074 erp_action->fsf_req = req;
1075 req->erp_action = erp_action;
1076 zfcp_fsf_start_erp_timer(req);
1077 } else
1078 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1079
1080 ret = zfcp_fsf_req_send(req);
1081 if (ret)
1082 goto failed_send;
1083
1084 goto out;
1085
1086 failed_send:
1087 zfcp_fsf_req_free(req);
1088 if (erp_action)
1089 erp_action->fsf_req = NULL;
1090 out:
1091 spin_unlock_bh(&adapter->req_q_lock);
1092 return ret;
1093 }
1094
1095 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1096 {
1097 struct zfcp_send_els *send_els = req->data;
1098 struct zfcp_port *port = send_els->port;
1099 struct fsf_qtcb_header *header = &req->qtcb->header;
1100
1101 send_els->status = -EINVAL;
1102
1103 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1104 goto skip_fsfstatus;
1105
1106 switch (header->fsf_status) {
1107 case FSF_GOOD:
1108 zfcp_san_dbf_event_els_response(req);
1109 send_els->status = 0;
1110 break;
1111 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1112 zfcp_fsf_class_not_supp(req);
1113 break;
1114 case FSF_ADAPTER_STATUS_AVAILABLE:
1115 switch (header->fsf_status_qual.word[0]){
1116 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1117 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1118 zfcp_test_link(port);
1119 /*fall through */
1120 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1121 case FSF_SQ_RETRY_IF_POSSIBLE:
1122 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1123 break;
1124 }
1125 break;
1126 case FSF_ELS_COMMAND_REJECTED:
1127 case FSF_PAYLOAD_SIZE_MISMATCH:
1128 case FSF_REQUEST_SIZE_TOO_LARGE:
1129 case FSF_RESPONSE_SIZE_TOO_LARGE:
1130 break;
1131 case FSF_ACCESS_DENIED:
1132 zfcp_fsf_access_denied_port(req, port);
1133 break;
1134 case FSF_SBAL_MISMATCH:
1135 /* should never occure, avoided in zfcp_fsf_send_els */
1136 /* fall through */
1137 default:
1138 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1139 break;
1140 }
1141 skip_fsfstatus:
1142 if (send_els->handler)
1143 send_els->handler(send_els->handler_data);
1144 }
1145
1146 /**
1147 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1148 * @els: pointer to struct zfcp_send_els with data for the command
1149 */
1150 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1151 {
1152 struct zfcp_fsf_req *req;
1153 struct zfcp_adapter *adapter = els->adapter;
1154 struct fsf_qtcb_bottom_support *bottom;
1155 int ret = -EIO;
1156
1157 if (unlikely(!(atomic_read(&els->port->status) &
1158 ZFCP_STATUS_COMMON_UNBLOCKED)))
1159 return -EBUSY;
1160
1161 spin_lock(&adapter->req_q_lock);
1162 if (!zfcp_fsf_sbal_available(adapter))
1163 goto out;
1164 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1165 ZFCP_REQ_AUTO_CLEANUP, NULL);
1166 if (IS_ERR(req)) {
1167 ret = PTR_ERR(req);
1168 goto out;
1169 }
1170
1171 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1172
1173 if (ret)
1174 goto failed_send;
1175
1176 bottom = &req->qtcb->bottom.support;
1177 req->handler = zfcp_fsf_send_els_handler;
1178 bottom->d_id = els->d_id;
1179 bottom->service_class = FSF_CLASS_3;
1180 bottom->timeout = 2 * R_A_TOV;
1181 req->data = els;
1182
1183 zfcp_san_dbf_event_els_request(req);
1184
1185 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1186 ret = zfcp_fsf_req_send(req);
1187 if (ret)
1188 goto failed_send;
1189
1190 goto out;
1191
1192 failed_send:
1193 zfcp_fsf_req_free(req);
1194 out:
1195 spin_unlock(&adapter->req_q_lock);
1196 return ret;
1197 }
1198
1199 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1200 {
1201 struct qdio_buffer_element *sbale;
1202 struct zfcp_fsf_req *req;
1203 struct zfcp_adapter *adapter = erp_action->adapter;
1204 int retval = -EIO;
1205
1206 spin_lock_bh(&adapter->req_q_lock);
1207 if (!zfcp_fsf_sbal_available(adapter))
1208 goto out;
1209 req = zfcp_fsf_req_create(adapter,
1210 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1211 ZFCP_REQ_AUTO_CLEANUP,
1212 adapter->pool.fsf_req_erp);
1213 if (IS_ERR(req)) {
1214 retval = PTR_ERR(req);
1215 goto out;
1216 }
1217
1218 sbale = zfcp_qdio_sbale_req(req);
1219 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1220 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1221
1222 req->qtcb->bottom.config.feature_selection =
1223 FSF_FEATURE_CFDC |
1224 FSF_FEATURE_LUN_SHARING |
1225 FSF_FEATURE_NOTIFICATION_LOST |
1226 FSF_FEATURE_UPDATE_ALERT;
1227 req->erp_action = erp_action;
1228 req->handler = zfcp_fsf_exchange_config_data_handler;
1229 erp_action->fsf_req = req;
1230
1231 zfcp_fsf_start_erp_timer(req);
1232 retval = zfcp_fsf_req_send(req);
1233 if (retval) {
1234 zfcp_fsf_req_free(req);
1235 erp_action->fsf_req = NULL;
1236 }
1237 out:
1238 spin_unlock_bh(&adapter->req_q_lock);
1239 return retval;
1240 }
1241
1242 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1243 struct fsf_qtcb_bottom_config *data)
1244 {
1245 struct qdio_buffer_element *sbale;
1246 struct zfcp_fsf_req *req = NULL;
1247 int retval = -EIO;
1248
1249 spin_lock_bh(&adapter->req_q_lock);
1250 if (zfcp_fsf_req_sbal_get(adapter))
1251 goto out;
1252
1253 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1254 0, NULL);
1255 if (IS_ERR(req)) {
1256 retval = PTR_ERR(req);
1257 goto out;
1258 }
1259
1260 sbale = zfcp_qdio_sbale_req(req);
1261 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1262 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1263 req->handler = zfcp_fsf_exchange_config_data_handler;
1264
1265 req->qtcb->bottom.config.feature_selection =
1266 FSF_FEATURE_CFDC |
1267 FSF_FEATURE_LUN_SHARING |
1268 FSF_FEATURE_NOTIFICATION_LOST |
1269 FSF_FEATURE_UPDATE_ALERT;
1270
1271 if (data)
1272 req->data = data;
1273
1274 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1275 retval = zfcp_fsf_req_send(req);
1276 out:
1277 spin_unlock_bh(&adapter->req_q_lock);
1278 if (!retval)
1279 wait_event(req->completion_wq,
1280 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1281
1282 zfcp_fsf_req_free(req);
1283
1284 return retval;
1285 }
1286
1287 /**
1288 * zfcp_fsf_exchange_port_data - request information about local port
1289 * @erp_action: ERP action for the adapter for which port data is requested
1290 * Returns: 0 on success, error otherwise
1291 */
1292 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1293 {
1294 struct qdio_buffer_element *sbale;
1295 struct zfcp_fsf_req *req;
1296 struct zfcp_adapter *adapter = erp_action->adapter;
1297 int retval = -EIO;
1298
1299 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1300 return -EOPNOTSUPP;
1301
1302 spin_lock_bh(&adapter->req_q_lock);
1303 if (!zfcp_fsf_sbal_available(adapter))
1304 goto out;
1305 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1306 ZFCP_REQ_AUTO_CLEANUP,
1307 adapter->pool.fsf_req_erp);
1308 if (IS_ERR(req)) {
1309 retval = PTR_ERR(req);
1310 goto out;
1311 }
1312
1313 sbale = zfcp_qdio_sbale_req(req);
1314 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1315 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1316
1317 req->handler = zfcp_fsf_exchange_port_data_handler;
1318 req->erp_action = erp_action;
1319 erp_action->fsf_req = req;
1320
1321 zfcp_fsf_start_erp_timer(req);
1322 retval = zfcp_fsf_req_send(req);
1323 if (retval) {
1324 zfcp_fsf_req_free(req);
1325 erp_action->fsf_req = NULL;
1326 }
1327 out:
1328 spin_unlock_bh(&adapter->req_q_lock);
1329 return retval;
1330 }
1331
1332 /**
1333 * zfcp_fsf_exchange_port_data_sync - request information about local port
1334 * @adapter: pointer to struct zfcp_adapter
1335 * @data: pointer to struct fsf_qtcb_bottom_port
1336 * Returns: 0 on success, error otherwise
1337 */
1338 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1339 struct fsf_qtcb_bottom_port *data)
1340 {
1341 struct qdio_buffer_element *sbale;
1342 struct zfcp_fsf_req *req = NULL;
1343 int retval = -EIO;
1344
1345 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1346 return -EOPNOTSUPP;
1347
1348 spin_lock_bh(&adapter->req_q_lock);
1349 if (!zfcp_fsf_sbal_available(adapter))
1350 goto out;
1351
1352 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1353 NULL);
1354 if (IS_ERR(req)) {
1355 retval = PTR_ERR(req);
1356 goto out;
1357 }
1358
1359 if (data)
1360 req->data = data;
1361
1362 sbale = zfcp_qdio_sbale_req(req);
1363 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1364 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1365
1366 req->handler = zfcp_fsf_exchange_port_data_handler;
1367 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1368 retval = zfcp_fsf_req_send(req);
1369 out:
1370 spin_unlock_bh(&adapter->req_q_lock);
1371 if (!retval)
1372 wait_event(req->completion_wq,
1373 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1374 zfcp_fsf_req_free(req);
1375
1376 return retval;
1377 }
1378
1379 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1380 {
1381 struct zfcp_port *port = req->data;
1382 struct fsf_qtcb_header *header = &req->qtcb->header;
1383 struct fsf_plogi *plogi;
1384
1385 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1386 return;
1387
1388 switch (header->fsf_status) {
1389 case FSF_PORT_ALREADY_OPEN:
1390 break;
1391 case FSF_ACCESS_DENIED:
1392 zfcp_fsf_access_denied_port(req, port);
1393 break;
1394 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1395 dev_warn(&req->adapter->ccw_device->dev,
1396 "Not enough FCP adapter resources to open "
1397 "remote port 0x%016Lx\n",
1398 (unsigned long long)port->wwpn);
1399 zfcp_erp_port_failed(port, 31, req);
1400 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1401 break;
1402 case FSF_ADAPTER_STATUS_AVAILABLE:
1403 switch (header->fsf_status_qual.word[0]) {
1404 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1405 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1406 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1407 break;
1408 case FSF_SQ_NO_RETRY_POSSIBLE:
1409 dev_warn(&req->adapter->ccw_device->dev,
1410 "Remote port 0x%016Lx could not be opened\n",
1411 (unsigned long long)port->wwpn);
1412 zfcp_erp_port_failed(port, 32, req);
1413 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1414 break;
1415 }
1416 break;
1417 case FSF_GOOD:
1418 port->handle = header->port_handle;
1419 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1420 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1421 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1422 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1423 &port->status);
1424 /* check whether D_ID has changed during open */
1425 /*
1426 * FIXME: This check is not airtight, as the FCP channel does
1427 * not monitor closures of target port connections caused on
1428 * the remote side. Thus, they might miss out on invalidating
1429 * locally cached WWPNs (and other N_Port parameters) of gone
1430 * target ports. So, our heroic attempt to make things safe
1431 * could be undermined by 'open port' response data tagged with
1432 * obsolete WWPNs. Another reason to monitor potential
1433 * connection closures ourself at least (by interpreting
1434 * incoming ELS' and unsolicited status). It just crosses my
1435 * mind that one should be able to cross-check by means of
1436 * another GID_PN straight after a port has been opened.
1437 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1438 */
1439 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1440 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1441 if (plogi->serv_param.wwpn != port->wwpn)
1442 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1443 &port->status);
1444 else {
1445 port->wwnn = plogi->serv_param.wwnn;
1446 zfcp_fc_plogi_evaluate(port, plogi);
1447 }
1448 }
1449 break;
1450 case FSF_UNKNOWN_OP_SUBTYPE:
1451 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452 break;
1453 }
1454 }
1455
1456 /**
1457 * zfcp_fsf_open_port - create and send open port request
1458 * @erp_action: pointer to struct zfcp_erp_action
1459 * Returns: 0 on success, error otherwise
1460 */
1461 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1462 {
1463 struct qdio_buffer_element *sbale;
1464 struct zfcp_adapter *adapter = erp_action->adapter;
1465 struct zfcp_fsf_req *req;
1466 int retval = -EIO;
1467
1468 spin_lock_bh(&adapter->req_q_lock);
1469 if (zfcp_fsf_req_sbal_get(adapter))
1470 goto out;
1471
1472 req = zfcp_fsf_req_create(adapter,
1473 FSF_QTCB_OPEN_PORT_WITH_DID,
1474 ZFCP_REQ_AUTO_CLEANUP,
1475 adapter->pool.fsf_req_erp);
1476 if (IS_ERR(req)) {
1477 retval = PTR_ERR(req);
1478 goto out;
1479 }
1480
1481 sbale = zfcp_qdio_sbale_req(req);
1482 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1483 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1484
1485 req->handler = zfcp_fsf_open_port_handler;
1486 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1487 req->data = erp_action->port;
1488 req->erp_action = erp_action;
1489 erp_action->fsf_req = req;
1490
1491 zfcp_fsf_start_erp_timer(req);
1492 retval = zfcp_fsf_req_send(req);
1493 if (retval) {
1494 zfcp_fsf_req_free(req);
1495 erp_action->fsf_req = NULL;
1496 }
1497 out:
1498 spin_unlock_bh(&adapter->req_q_lock);
1499 return retval;
1500 }
1501
1502 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1503 {
1504 struct zfcp_port *port = req->data;
1505
1506 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1507 return;
1508
1509 switch (req->qtcb->header.fsf_status) {
1510 case FSF_PORT_HANDLE_NOT_VALID:
1511 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1512 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1513 break;
1514 case FSF_ADAPTER_STATUS_AVAILABLE:
1515 break;
1516 case FSF_GOOD:
1517 zfcp_erp_modify_port_status(port, 33, req,
1518 ZFCP_STATUS_COMMON_OPEN,
1519 ZFCP_CLEAR);
1520 break;
1521 }
1522 }
1523
1524 /**
1525 * zfcp_fsf_close_port - create and send close port request
1526 * @erp_action: pointer to struct zfcp_erp_action
1527 * Returns: 0 on success, error otherwise
1528 */
1529 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1530 {
1531 struct qdio_buffer_element *sbale;
1532 struct zfcp_adapter *adapter = erp_action->adapter;
1533 struct zfcp_fsf_req *req;
1534 int retval = -EIO;
1535
1536 spin_lock_bh(&adapter->req_q_lock);
1537 if (zfcp_fsf_req_sbal_get(adapter))
1538 goto out;
1539
1540 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1541 ZFCP_REQ_AUTO_CLEANUP,
1542 adapter->pool.fsf_req_erp);
1543 if (IS_ERR(req)) {
1544 retval = PTR_ERR(req);
1545 goto out;
1546 }
1547
1548 sbale = zfcp_qdio_sbale_req(req);
1549 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1550 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1551
1552 req->handler = zfcp_fsf_close_port_handler;
1553 req->data = erp_action->port;
1554 req->erp_action = erp_action;
1555 req->qtcb->header.port_handle = erp_action->port->handle;
1556 erp_action->fsf_req = req;
1557
1558 zfcp_fsf_start_erp_timer(req);
1559 retval = zfcp_fsf_req_send(req);
1560 if (retval) {
1561 zfcp_fsf_req_free(req);
1562 erp_action->fsf_req = NULL;
1563 }
1564 out:
1565 spin_unlock_bh(&adapter->req_q_lock);
1566 return retval;
1567 }
1568
1569 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1570 {
1571 struct zfcp_wka_port *wka_port = req->data;
1572 struct fsf_qtcb_header *header = &req->qtcb->header;
1573
1574 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1575 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1576 goto out;
1577 }
1578
1579 switch (header->fsf_status) {
1580 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1581 dev_warn(&req->adapter->ccw_device->dev,
1582 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1583 case FSF_ADAPTER_STATUS_AVAILABLE:
1584 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1585 case FSF_ACCESS_DENIED:
1586 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1587 break;
1588 case FSF_PORT_ALREADY_OPEN:
1589 break;
1590 case FSF_GOOD:
1591 wka_port->handle = header->port_handle;
1592 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1593 }
1594 out:
1595 wake_up(&wka_port->completion_wq);
1596 }
1597
1598 /**
1599 * zfcp_fsf_open_wka_port - create and send open wka-port request
1600 * @wka_port: pointer to struct zfcp_wka_port
1601 * Returns: 0 on success, error otherwise
1602 */
1603 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1604 {
1605 struct qdio_buffer_element *sbale;
1606 struct zfcp_adapter *adapter = wka_port->adapter;
1607 struct zfcp_fsf_req *req;
1608 int retval = -EIO;
1609
1610 spin_lock_bh(&adapter->req_q_lock);
1611 if (zfcp_fsf_req_sbal_get(adapter))
1612 goto out;
1613
1614 req = zfcp_fsf_req_create(adapter,
1615 FSF_QTCB_OPEN_PORT_WITH_DID,
1616 ZFCP_REQ_AUTO_CLEANUP,
1617 adapter->pool.fsf_req_erp);
1618 if (unlikely(IS_ERR(req))) {
1619 retval = PTR_ERR(req);
1620 goto out;
1621 }
1622
1623 sbale = zfcp_qdio_sbale_req(req);
1624 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1625 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1626
1627 req->handler = zfcp_fsf_open_wka_port_handler;
1628 req->qtcb->bottom.support.d_id = wka_port->d_id;
1629 req->data = wka_port;
1630
1631 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1632 retval = zfcp_fsf_req_send(req);
1633 if (retval)
1634 zfcp_fsf_req_free(req);
1635 out:
1636 spin_unlock_bh(&adapter->req_q_lock);
1637 return retval;
1638 }
1639
1640 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1641 {
1642 struct zfcp_wka_port *wka_port = req->data;
1643
1644 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1645 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1647 }
1648
1649 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1650 wake_up(&wka_port->completion_wq);
1651 }
1652
1653 /**
1654 * zfcp_fsf_close_wka_port - create and send close wka port request
1655 * @erp_action: pointer to struct zfcp_erp_action
1656 * Returns: 0 on success, error otherwise
1657 */
1658 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1659 {
1660 struct qdio_buffer_element *sbale;
1661 struct zfcp_adapter *adapter = wka_port->adapter;
1662 struct zfcp_fsf_req *req;
1663 int retval = -EIO;
1664
1665 spin_lock_bh(&adapter->req_q_lock);
1666 if (zfcp_fsf_req_sbal_get(adapter))
1667 goto out;
1668
1669 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1670 ZFCP_REQ_AUTO_CLEANUP,
1671 adapter->pool.fsf_req_erp);
1672 if (unlikely(IS_ERR(req))) {
1673 retval = PTR_ERR(req);
1674 goto out;
1675 }
1676
1677 sbale = zfcp_qdio_sbale_req(req);
1678 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1679 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1680
1681 req->handler = zfcp_fsf_close_wka_port_handler;
1682 req->data = wka_port;
1683 req->qtcb->header.port_handle = wka_port->handle;
1684
1685 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1686 retval = zfcp_fsf_req_send(req);
1687 if (retval)
1688 zfcp_fsf_req_free(req);
1689 out:
1690 spin_unlock_bh(&adapter->req_q_lock);
1691 return retval;
1692 }
1693
1694 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1695 {
1696 struct zfcp_port *port = req->data;
1697 struct fsf_qtcb_header *header = &req->qtcb->header;
1698 struct zfcp_unit *unit;
1699
1700 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1701 goto skip_fsfstatus;
1702
1703 switch (header->fsf_status) {
1704 case FSF_PORT_HANDLE_NOT_VALID:
1705 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1706 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707 break;
1708 case FSF_ACCESS_DENIED:
1709 zfcp_fsf_access_denied_port(req, port);
1710 break;
1711 case FSF_PORT_BOXED:
1712 zfcp_erp_port_boxed(port, 50, req);
1713 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1714 ZFCP_STATUS_FSFREQ_RETRY;
1715 /* can't use generic zfcp_erp_modify_port_status because
1716 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1717 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718 list_for_each_entry(unit, &port->unit_list_head, list)
1719 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1720 &unit->status);
1721 break;
1722 case FSF_ADAPTER_STATUS_AVAILABLE:
1723 switch (header->fsf_status_qual.word[0]) {
1724 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1725 /* fall through */
1726 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1727 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1728 break;
1729 }
1730 break;
1731 case FSF_GOOD:
1732 /* can't use generic zfcp_erp_modify_port_status because
1733 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1734 */
1735 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1736 list_for_each_entry(unit, &port->unit_list_head, list)
1737 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1738 &unit->status);
1739 break;
1740 }
1741 skip_fsfstatus:
1742 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1743 }
1744
1745 /**
1746 * zfcp_fsf_close_physical_port - close physical port
1747 * @erp_action: pointer to struct zfcp_erp_action
1748 * Returns: 0 on success
1749 */
1750 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1751 {
1752 struct qdio_buffer_element *sbale;
1753 struct zfcp_adapter *adapter = erp_action->adapter;
1754 struct zfcp_fsf_req *req;
1755 int retval = -EIO;
1756
1757 spin_lock_bh(&adapter->req_q_lock);
1758 if (zfcp_fsf_req_sbal_get(adapter))
1759 goto out;
1760
1761 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1762 ZFCP_REQ_AUTO_CLEANUP,
1763 adapter->pool.fsf_req_erp);
1764 if (IS_ERR(req)) {
1765 retval = PTR_ERR(req);
1766 goto out;
1767 }
1768
1769 sbale = zfcp_qdio_sbale_req(req);
1770 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1771 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1772
1773 req->data = erp_action->port;
1774 req->qtcb->header.port_handle = erp_action->port->handle;
1775 req->erp_action = erp_action;
1776 req->handler = zfcp_fsf_close_physical_port_handler;
1777 erp_action->fsf_req = req;
1778 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1779 &erp_action->port->status);
1780
1781 zfcp_fsf_start_erp_timer(req);
1782 retval = zfcp_fsf_req_send(req);
1783 if (retval) {
1784 zfcp_fsf_req_free(req);
1785 erp_action->fsf_req = NULL;
1786 }
1787 out:
1788 spin_unlock_bh(&adapter->req_q_lock);
1789 return retval;
1790 }
1791
1792 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1793 {
1794 struct zfcp_adapter *adapter = req->adapter;
1795 struct zfcp_unit *unit = req->data;
1796 struct fsf_qtcb_header *header = &req->qtcb->header;
1797 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1798 struct fsf_queue_designator *queue_designator =
1799 &header->fsf_status_qual.fsf_queue_designator;
1800 int exclusive, readwrite;
1801
1802 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1803 return;
1804
1805 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1806 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1807 ZFCP_STATUS_UNIT_SHARED |
1808 ZFCP_STATUS_UNIT_READONLY,
1809 &unit->status);
1810
1811 switch (header->fsf_status) {
1812
1813 case FSF_PORT_HANDLE_NOT_VALID:
1814 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1815 /* fall through */
1816 case FSF_LUN_ALREADY_OPEN:
1817 break;
1818 case FSF_ACCESS_DENIED:
1819 zfcp_fsf_access_denied_unit(req, unit);
1820 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1821 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1822 break;
1823 case FSF_PORT_BOXED:
1824 zfcp_erp_port_boxed(unit->port, 51, req);
1825 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1826 ZFCP_STATUS_FSFREQ_RETRY;
1827 break;
1828 case FSF_LUN_SHARING_VIOLATION:
1829 if (header->fsf_status_qual.word[0])
1830 dev_warn(&adapter->ccw_device->dev,
1831 "LUN 0x%Lx on port 0x%Lx is already in "
1832 "use by CSS%d, MIF Image ID %x\n",
1833 (unsigned long long)unit->fcp_lun,
1834 (unsigned long long)unit->port->wwpn,
1835 queue_designator->cssid,
1836 queue_designator->hla);
1837 else
1838 zfcp_act_eval_err(adapter,
1839 header->fsf_status_qual.word[2]);
1840 zfcp_erp_unit_access_denied(unit, 60, req);
1841 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1842 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1843 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1844 break;
1845 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1846 dev_warn(&adapter->ccw_device->dev,
1847 "No handle is available for LUN "
1848 "0x%016Lx on port 0x%016Lx\n",
1849 (unsigned long long)unit->fcp_lun,
1850 (unsigned long long)unit->port->wwpn);
1851 zfcp_erp_unit_failed(unit, 34, req);
1852 /* fall through */
1853 case FSF_INVALID_COMMAND_OPTION:
1854 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1855 break;
1856 case FSF_ADAPTER_STATUS_AVAILABLE:
1857 switch (header->fsf_status_qual.word[0]) {
1858 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1859 zfcp_test_link(unit->port);
1860 /* fall through */
1861 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1862 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1863 break;
1864 }
1865 break;
1866
1867 case FSF_GOOD:
1868 unit->handle = header->lun_handle;
1869 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1870
1871 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1872 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1873 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1874 exclusive = (bottom->lun_access_info &
1875 FSF_UNIT_ACCESS_EXCLUSIVE);
1876 readwrite = (bottom->lun_access_info &
1877 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1878
1879 if (!exclusive)
1880 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1881 &unit->status);
1882
1883 if (!readwrite) {
1884 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1885 &unit->status);
1886 dev_info(&adapter->ccw_device->dev,
1887 "SCSI device at LUN 0x%016Lx on port "
1888 "0x%016Lx opened read-only\n",
1889 (unsigned long long)unit->fcp_lun,
1890 (unsigned long long)unit->port->wwpn);
1891 }
1892
1893 if (exclusive && !readwrite) {
1894 dev_err(&adapter->ccw_device->dev,
1895 "Exclusive read-only access not "
1896 "supported (unit 0x%016Lx, "
1897 "port 0x%016Lx)\n",
1898 (unsigned long long)unit->fcp_lun,
1899 (unsigned long long)unit->port->wwpn);
1900 zfcp_erp_unit_failed(unit, 35, req);
1901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1903 } else if (!exclusive && readwrite) {
1904 dev_err(&adapter->ccw_device->dev,
1905 "Shared read-write access not "
1906 "supported (unit 0x%016Lx, port "
1907 "0x%016Lx\n)",
1908 (unsigned long long)unit->fcp_lun,
1909 (unsigned long long)unit->port->wwpn);
1910 zfcp_erp_unit_failed(unit, 36, req);
1911 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1913 }
1914 }
1915 break;
1916 }
1917 }
1918
1919 /**
1920 * zfcp_fsf_open_unit - open unit
1921 * @erp_action: pointer to struct zfcp_erp_action
1922 * Returns: 0 on success, error otherwise
1923 */
1924 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1925 {
1926 struct qdio_buffer_element *sbale;
1927 struct zfcp_adapter *adapter = erp_action->adapter;
1928 struct zfcp_fsf_req *req;
1929 int retval = -EIO;
1930
1931 spin_lock_bh(&adapter->req_q_lock);
1932 if (zfcp_fsf_req_sbal_get(adapter))
1933 goto out;
1934
1935 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1936 ZFCP_REQ_AUTO_CLEANUP,
1937 adapter->pool.fsf_req_erp);
1938 if (IS_ERR(req)) {
1939 retval = PTR_ERR(req);
1940 goto out;
1941 }
1942
1943 sbale = zfcp_qdio_sbale_req(req);
1944 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1945 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1946
1947 req->qtcb->header.port_handle = erp_action->port->handle;
1948 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1949 req->handler = zfcp_fsf_open_unit_handler;
1950 req->data = erp_action->unit;
1951 req->erp_action = erp_action;
1952 erp_action->fsf_req = req;
1953
1954 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1955 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1956
1957 zfcp_fsf_start_erp_timer(req);
1958 retval = zfcp_fsf_req_send(req);
1959 if (retval) {
1960 zfcp_fsf_req_free(req);
1961 erp_action->fsf_req = NULL;
1962 }
1963 out:
1964 spin_unlock_bh(&adapter->req_q_lock);
1965 return retval;
1966 }
1967
1968 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1969 {
1970 struct zfcp_unit *unit = req->data;
1971
1972 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1973 return;
1974
1975 switch (req->qtcb->header.fsf_status) {
1976 case FSF_PORT_HANDLE_NOT_VALID:
1977 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1978 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1979 break;
1980 case FSF_LUN_HANDLE_NOT_VALID:
1981 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1982 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1983 break;
1984 case FSF_PORT_BOXED:
1985 zfcp_erp_port_boxed(unit->port, 52, req);
1986 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1987 ZFCP_STATUS_FSFREQ_RETRY;
1988 break;
1989 case FSF_ADAPTER_STATUS_AVAILABLE:
1990 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1991 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1992 zfcp_test_link(unit->port);
1993 /* fall through */
1994 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1995 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1996 break;
1997 }
1998 break;
1999 case FSF_GOOD:
2000 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2001 break;
2002 }
2003 }
2004
2005 /**
2006 * zfcp_fsf_close_unit - close zfcp unit
2007 * @erp_action: pointer to struct zfcp_unit
2008 * Returns: 0 on success, error otherwise
2009 */
2010 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2011 {
2012 struct qdio_buffer_element *sbale;
2013 struct zfcp_adapter *adapter = erp_action->adapter;
2014 struct zfcp_fsf_req *req;
2015 int retval = -EIO;
2016
2017 spin_lock_bh(&adapter->req_q_lock);
2018 if (zfcp_fsf_req_sbal_get(adapter))
2019 goto out;
2020 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2021 ZFCP_REQ_AUTO_CLEANUP,
2022 adapter->pool.fsf_req_erp);
2023 if (IS_ERR(req)) {
2024 retval = PTR_ERR(req);
2025 goto out;
2026 }
2027
2028 sbale = zfcp_qdio_sbale_req(req);
2029 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2030 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2031
2032 req->qtcb->header.port_handle = erp_action->port->handle;
2033 req->qtcb->header.lun_handle = erp_action->unit->handle;
2034 req->handler = zfcp_fsf_close_unit_handler;
2035 req->data = erp_action->unit;
2036 req->erp_action = erp_action;
2037 erp_action->fsf_req = req;
2038
2039 zfcp_fsf_start_erp_timer(req);
2040 retval = zfcp_fsf_req_send(req);
2041 if (retval) {
2042 zfcp_fsf_req_free(req);
2043 erp_action->fsf_req = NULL;
2044 }
2045 out:
2046 spin_unlock_bh(&adapter->req_q_lock);
2047 return retval;
2048 }
2049
2050 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2051 {
2052 lat_rec->sum += lat;
2053 lat_rec->min = min(lat_rec->min, lat);
2054 lat_rec->max = max(lat_rec->max, lat);
2055 }
2056
2057 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2058 {
2059 struct fsf_qual_latency_info *lat_inf;
2060 struct latency_cont *lat;
2061 struct zfcp_unit *unit = req->unit;
2062 unsigned long flags;
2063
2064 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2065
2066 switch (req->qtcb->bottom.io.data_direction) {
2067 case FSF_DATADIR_READ:
2068 lat = &unit->latencies.read;
2069 break;
2070 case FSF_DATADIR_WRITE:
2071 lat = &unit->latencies.write;
2072 break;
2073 case FSF_DATADIR_CMND:
2074 lat = &unit->latencies.cmd;
2075 break;
2076 default:
2077 return;
2078 }
2079
2080 spin_lock_irqsave(&unit->latencies.lock, flags);
2081 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2082 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2083 lat->counter++;
2084 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2085 }
2086
2087 #ifdef CONFIG_BLK_DEV_IO_TRACE
2088 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2089 {
2090 struct fsf_qual_latency_info *lat_inf;
2091 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2092 struct request *req = scsi_cmnd->request;
2093 struct zfcp_blk_drv_data trace;
2094 int ticks = fsf_req->adapter->timer_ticks;
2095
2096 trace.flags = 0;
2097 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2098 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2099 trace.flags |= ZFCP_BLK_LAT_VALID;
2100 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2101 trace.channel_lat = lat_inf->channel_lat * ticks;
2102 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2103 }
2104 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2105 trace.flags |= ZFCP_BLK_REQ_ERROR;
2106 trace.inb_usage = fsf_req->qdio_inb_usage;
2107 trace.outb_usage = fsf_req->qdio_outb_usage;
2108
2109 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2110 }
2111 #else
2112 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2113 {
2114 }
2115 #endif
2116
2117 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2118 {
2119 struct scsi_cmnd *scpnt;
2120 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2121 &(req->qtcb->bottom.io.fcp_rsp);
2122 u32 sns_len;
2123 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2124 unsigned long flags;
2125
2126 read_lock_irqsave(&req->adapter->abort_lock, flags);
2127
2128 scpnt = req->data;
2129 if (unlikely(!scpnt)) {
2130 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2131 return;
2132 }
2133
2134 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2135 set_host_byte(scpnt, DID_SOFT_ERROR);
2136 set_driver_byte(scpnt, SUGGEST_RETRY);
2137 goto skip_fsfstatus;
2138 }
2139
2140 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2141 set_host_byte(scpnt, DID_ERROR);
2142 goto skip_fsfstatus;
2143 }
2144
2145 set_msg_byte(scpnt, COMMAND_COMPLETE);
2146
2147 scpnt->result |= fcp_rsp_iu->scsi_status;
2148
2149 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2150 zfcp_fsf_req_latency(req);
2151
2152 zfcp_fsf_trace_latency(req);
2153
2154 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2155 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2156 set_host_byte(scpnt, DID_OK);
2157 else {
2158 set_host_byte(scpnt, DID_ERROR);
2159 goto skip_fsfstatus;
2160 }
2161 }
2162
2163 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2164 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2165 fcp_rsp_iu->fcp_rsp_len;
2166 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2167 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2168
2169 memcpy(scpnt->sense_buffer,
2170 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2171 }
2172
2173 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2174 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2175 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2176 scpnt->underflow)
2177 set_host_byte(scpnt, DID_ERROR);
2178 }
2179 skip_fsfstatus:
2180 if (scpnt->result != 0)
2181 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2182 else if (scpnt->retries > 0)
2183 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2184 else
2185 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2186
2187 scpnt->host_scribble = NULL;
2188 (scpnt->scsi_done) (scpnt);
2189 /*
2190 * We must hold this lock until scsi_done has been called.
2191 * Otherwise we may call scsi_done after abort regarding this
2192 * command has completed.
2193 * Note: scsi_done must not block!
2194 */
2195 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2196 }
2197
2198 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2199 {
2200 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2201 &(req->qtcb->bottom.io.fcp_rsp);
2202 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2203
2204 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2205 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2206 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2207 }
2208
2209
2210 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2211 {
2212 struct zfcp_unit *unit;
2213 struct fsf_qtcb_header *header = &req->qtcb->header;
2214
2215 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2216 unit = req->data;
2217 else
2218 unit = req->unit;
2219
2220 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2221 goto skip_fsfstatus;
2222
2223 switch (header->fsf_status) {
2224 case FSF_HANDLE_MISMATCH:
2225 case FSF_PORT_HANDLE_NOT_VALID:
2226 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2227 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2228 break;
2229 case FSF_FCPLUN_NOT_VALID:
2230 case FSF_LUN_HANDLE_NOT_VALID:
2231 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2232 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2233 break;
2234 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2235 zfcp_fsf_class_not_supp(req);
2236 break;
2237 case FSF_ACCESS_DENIED:
2238 zfcp_fsf_access_denied_unit(req, unit);
2239 break;
2240 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2241 dev_err(&req->adapter->ccw_device->dev,
2242 "Incorrect direction %d, unit 0x%016Lx on port "
2243 "0x%016Lx closed\n",
2244 req->qtcb->bottom.io.data_direction,
2245 (unsigned long long)unit->fcp_lun,
2246 (unsigned long long)unit->port->wwpn);
2247 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2248 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2249 break;
2250 case FSF_CMND_LENGTH_NOT_VALID:
2251 dev_err(&req->adapter->ccw_device->dev,
2252 "Incorrect CDB length %d, unit 0x%016Lx on "
2253 "port 0x%016Lx closed\n",
2254 req->qtcb->bottom.io.fcp_cmnd_length,
2255 (unsigned long long)unit->fcp_lun,
2256 (unsigned long long)unit->port->wwpn);
2257 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2258 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2259 break;
2260 case FSF_PORT_BOXED:
2261 zfcp_erp_port_boxed(unit->port, 53, req);
2262 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2263 ZFCP_STATUS_FSFREQ_RETRY;
2264 break;
2265 case FSF_LUN_BOXED:
2266 zfcp_erp_unit_boxed(unit, 54, req);
2267 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2268 ZFCP_STATUS_FSFREQ_RETRY;
2269 break;
2270 case FSF_ADAPTER_STATUS_AVAILABLE:
2271 if (header->fsf_status_qual.word[0] ==
2272 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2273 zfcp_test_link(unit->port);
2274 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2275 break;
2276 }
2277 skip_fsfstatus:
2278 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2279 zfcp_fsf_send_fcp_ctm_handler(req);
2280 else {
2281 zfcp_fsf_send_fcp_command_task_handler(req);
2282 req->unit = NULL;
2283 zfcp_unit_put(unit);
2284 }
2285 }
2286
2287 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2288 {
2289 u32 *fcp_dl_ptr;
2290
2291 /*
2292 * fcp_dl_addr = start address of fcp_cmnd structure +
2293 * size of fixed part + size of dynamically sized add_dcp_cdb field
2294 * SEE FCP-2 documentation
2295 */
2296 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2297 (fcp_cmd->add_fcp_cdb_length << 2));
2298 *fcp_dl_ptr = fcp_dl;
2299 }
2300
2301 /**
2302 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2303 * @adapter: adapter where scsi command is issued
2304 * @unit: unit where command is sent to
2305 * @scsi_cmnd: scsi command to be sent
2306 * @timer: timer to be started when request is initiated
2307 * @req_flags: flags for fsf_request
2308 */
2309 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2310 struct zfcp_unit *unit,
2311 struct scsi_cmnd *scsi_cmnd,
2312 int use_timer, int req_flags)
2313 {
2314 struct zfcp_fsf_req *req;
2315 struct fcp_cmnd_iu *fcp_cmnd_iu;
2316 unsigned int sbtype;
2317 int real_bytes, retval = -EIO;
2318
2319 if (unlikely(!(atomic_read(&unit->status) &
2320 ZFCP_STATUS_COMMON_UNBLOCKED)))
2321 return -EBUSY;
2322
2323 spin_lock(&adapter->req_q_lock);
2324 if (!zfcp_fsf_sbal_available(adapter))
2325 goto out;
2326 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2327 adapter->pool.fsf_req_scsi);
2328 if (IS_ERR(req)) {
2329 retval = PTR_ERR(req);
2330 goto out;
2331 }
2332
2333 zfcp_unit_get(unit);
2334 req->unit = unit;
2335 req->data = scsi_cmnd;
2336 req->handler = zfcp_fsf_send_fcp_command_handler;
2337 req->qtcb->header.lun_handle = unit->handle;
2338 req->qtcb->header.port_handle = unit->port->handle;
2339 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2340
2341 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2342
2343 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2344 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2345 /*
2346 * set depending on data direction:
2347 * data direction bits in SBALE (SB Type)
2348 * data direction bits in QTCB
2349 * data direction bits in FCP_CMND IU
2350 */
2351 switch (scsi_cmnd->sc_data_direction) {
2352 case DMA_NONE:
2353 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2354 sbtype = SBAL_FLAGS0_TYPE_READ;
2355 break;
2356 case DMA_FROM_DEVICE:
2357 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2358 sbtype = SBAL_FLAGS0_TYPE_READ;
2359 fcp_cmnd_iu->rddata = 1;
2360 break;
2361 case DMA_TO_DEVICE:
2362 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2363 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2364 fcp_cmnd_iu->wddata = 1;
2365 break;
2366 case DMA_BIDIRECTIONAL:
2367 default:
2368 retval = -EIO;
2369 goto failed_scsi_cmnd;
2370 }
2371
2372 if (likely((scsi_cmnd->device->simple_tags) ||
2373 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2374 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2375 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2376 else
2377 fcp_cmnd_iu->task_attribute = UNTAGGED;
2378
2379 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2380 fcp_cmnd_iu->add_fcp_cdb_length =
2381 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2382
2383 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2384
2385 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2386 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2387
2388 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2389 scsi_sglist(scsi_cmnd),
2390 FSF_MAX_SBALS_PER_REQ);
2391 if (unlikely(real_bytes < 0)) {
2392 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2393 retval = -EIO;
2394 else {
2395 dev_err(&adapter->ccw_device->dev,
2396 "Oversize data package, unit 0x%016Lx "
2397 "on port 0x%016Lx closed\n",
2398 (unsigned long long)unit->fcp_lun,
2399 (unsigned long long)unit->port->wwpn);
2400 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2401 retval = -EINVAL;
2402 }
2403 goto failed_scsi_cmnd;
2404 }
2405
2406 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2407
2408 if (use_timer)
2409 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2410
2411 retval = zfcp_fsf_req_send(req);
2412 if (unlikely(retval))
2413 goto failed_scsi_cmnd;
2414
2415 goto out;
2416
2417 failed_scsi_cmnd:
2418 zfcp_unit_put(unit);
2419 zfcp_fsf_req_free(req);
2420 scsi_cmnd->host_scribble = NULL;
2421 out:
2422 spin_unlock(&adapter->req_q_lock);
2423 return retval;
2424 }
2425
2426 /**
2427 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2428 * @adapter: pointer to struct zfcp-adapter
2429 * @unit: pointer to struct zfcp_unit
2430 * @tm_flags: unsigned byte for task management flags
2431 * @req_flags: int request flags
2432 * Returns: on success pointer to struct fsf_req, NULL otherwise
2433 */
2434 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2435 struct zfcp_unit *unit,
2436 u8 tm_flags, int req_flags)
2437 {
2438 struct qdio_buffer_element *sbale;
2439 struct zfcp_fsf_req *req = NULL;
2440 struct fcp_cmnd_iu *fcp_cmnd_iu;
2441
2442 if (unlikely(!(atomic_read(&unit->status) &
2443 ZFCP_STATUS_COMMON_UNBLOCKED)))
2444 return NULL;
2445
2446 spin_lock(&adapter->req_q_lock);
2447 if (!zfcp_fsf_sbal_available(adapter))
2448 goto out;
2449 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2450 adapter->pool.fsf_req_scsi);
2451 if (IS_ERR(req)) {
2452 req = NULL;
2453 goto out;
2454 }
2455
2456 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2457 req->data = unit;
2458 req->handler = zfcp_fsf_send_fcp_command_handler;
2459 req->qtcb->header.lun_handle = unit->handle;
2460 req->qtcb->header.port_handle = unit->port->handle;
2461 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2462 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2463 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2464 sizeof(u32);
2465
2466 sbale = zfcp_qdio_sbale_req(req);
2467 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2468 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2469
2470 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2471 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2472 fcp_cmnd_iu->task_management_flags = tm_flags;
2473
2474 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2475 if (!zfcp_fsf_req_send(req))
2476 goto out;
2477
2478 zfcp_fsf_req_free(req);
2479 req = NULL;
2480 out:
2481 spin_unlock(&adapter->req_q_lock);
2482 return req;
2483 }
2484
2485 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2486 {
2487 if (req->qtcb->header.fsf_status != FSF_GOOD)
2488 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2489 }
2490
2491 /**
2492 * zfcp_fsf_control_file - control file upload/download
2493 * @adapter: pointer to struct zfcp_adapter
2494 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2495 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2496 */
2497 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2498 struct zfcp_fsf_cfdc *fsf_cfdc)
2499 {
2500 struct qdio_buffer_element *sbale;
2501 struct zfcp_fsf_req *req = NULL;
2502 struct fsf_qtcb_bottom_support *bottom;
2503 int direction, retval = -EIO, bytes;
2504
2505 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2506 return ERR_PTR(-EOPNOTSUPP);
2507
2508 switch (fsf_cfdc->command) {
2509 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2510 direction = SBAL_FLAGS0_TYPE_WRITE;
2511 break;
2512 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2513 direction = SBAL_FLAGS0_TYPE_READ;
2514 break;
2515 default:
2516 return ERR_PTR(-EINVAL);
2517 }
2518
2519 spin_lock_bh(&adapter->req_q_lock);
2520 if (zfcp_fsf_req_sbal_get(adapter))
2521 goto out;
2522
2523 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2524 if (IS_ERR(req)) {
2525 retval = -EPERM;
2526 goto out;
2527 }
2528
2529 req->handler = zfcp_fsf_control_file_handler;
2530
2531 sbale = zfcp_qdio_sbale_req(req);
2532 sbale[0].flags |= direction;
2533
2534 bottom = &req->qtcb->bottom.support;
2535 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2536 bottom->option = fsf_cfdc->option;
2537
2538 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2539 FSF_MAX_SBALS_PER_REQ);
2540 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2541 retval = -ENOMEM;
2542 zfcp_fsf_req_free(req);
2543 goto out;
2544 }
2545
2546 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2547 retval = zfcp_fsf_req_send(req);
2548 out:
2549 spin_unlock_bh(&adapter->req_q_lock);
2550
2551 if (!retval) {
2552 wait_event(req->completion_wq,
2553 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2554 return req;
2555 }
2556 return ERR_PTR(retval);
2557 }
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