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[SCSI] zfcp: remove all typedefs and replace them with standards
[linux-2.6/mini2440.git] / drivers / s390 / scsi / zfcp_fsf.c
blob02a570084d88fbba6bff7466bdf26375f2749019
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2008
7 */
8
9 #include "zfcp_ext.h"
10
11 static void zfcp_fsf_request_timeout_handler(unsigned long data)
12 {
13 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
14 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
15 NULL);
16 }
17
18 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
19 unsigned long timeout)
20 {
21 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
22 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
23 fsf_req->timer.expires = jiffies + timeout;
24 add_timer(&fsf_req->timer);
25 }
26
27 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
28 {
29 BUG_ON(!fsf_req->erp_action);
30 fsf_req->timer.function = zfcp_erp_timeout_handler;
31 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
32 fsf_req->timer.expires = jiffies + 30 * HZ;
33 add_timer(&fsf_req->timer);
34 }
35
36 /* association between FSF command and FSF QTCB type */
37 static u32 fsf_qtcb_type[] = {
38 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
39 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
40 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
41 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
42 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
43 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
48 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
49 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
51 };
52
53 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
54 {
55 u16 subtable = table >> 16;
56 u16 rule = table & 0xffff;
57 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
58
59 if (subtable && subtable < ARRAY_SIZE(act_type))
60 dev_warn(&adapter->ccw_device->dev,
61 "Access denied according to ACT rule type %s, "
62 "rule %d\n", act_type[subtable], rule);
63 }
64
65 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
66 struct zfcp_port *port)
67 {
68 struct fsf_qtcb_header *header = &req->qtcb->header;
69 dev_warn(&req->adapter->ccw_device->dev,
70 "Access denied to port 0x%016Lx\n",
71 (unsigned long long)port->wwpn);
72 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
73 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
74 zfcp_erp_port_access_denied(port, 55, req);
75 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
76 }
77
78 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
79 struct zfcp_unit *unit)
80 {
81 struct fsf_qtcb_header *header = &req->qtcb->header;
82 dev_warn(&req->adapter->ccw_device->dev,
83 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
84 (unsigned long long)unit->fcp_lun,
85 (unsigned long long)unit->port->wwpn);
86 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
87 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
88 zfcp_erp_unit_access_denied(unit, 59, req);
89 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
90 }
91
92 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
93 {
94 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
95 "operational because of an unsupported FC class\n");
96 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
97 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
98 }
99
100 /**
101 * zfcp_fsf_req_free - free memory used by fsf request
102 * @fsf_req: pointer to struct zfcp_fsf_req
103 */
104 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
105 {
106 if (likely(req->pool)) {
107 mempool_free(req, req->pool);
108 return;
109 }
110
111 if (req->qtcb) {
112 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
113 return;
114 }
115 }
116
117 /**
118 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
119 * @adapter: pointer to struct zfcp_adapter
120 *
121 * Never ever call this without shutting down the adapter first.
122 * Otherwise the adapter would continue using and corrupting s390 storage.
123 * Included BUG_ON() call to ensure this is done.
124 * ERP is supposed to be the only user of this function.
125 */
126 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
127 {
128 struct zfcp_fsf_req *req, *tmp;
129 unsigned long flags;
130 LIST_HEAD(remove_queue);
131 unsigned int i;
132
133 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
134 spin_lock_irqsave(&adapter->req_list_lock, flags);
135 for (i = 0; i < REQUEST_LIST_SIZE; i++)
136 list_splice_init(&adapter->req_list[i], &remove_queue);
137 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
138
139 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
140 list_del(&req->list);
141 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
142 zfcp_fsf_req_complete(req);
143 }
144 }
145
146 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
147 {
148 struct fsf_status_read_buffer *sr_buf = req->data;
149 struct zfcp_adapter *adapter = req->adapter;
150 struct zfcp_port *port;
151 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
152 unsigned long flags;
153
154 read_lock_irqsave(&zfcp_data.config_lock, flags);
155 list_for_each_entry(port, &adapter->port_list_head, list)
156 if (port->d_id == d_id) {
157 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
158 switch (sr_buf->status_subtype) {
159 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
160 zfcp_erp_port_reopen(port, 0, 101, req);
161 break;
162 case FSF_STATUS_READ_SUB_ERROR_PORT:
163 zfcp_erp_port_shutdown(port, 0, 122, req);
164 break;
165 }
166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
169 }
170
171 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
172 struct fsf_link_down_info *link_down)
173 {
174 struct zfcp_adapter *adapter = req->adapter;
175
176 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
177 return;
178
179 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
180
181 if (!link_down)
182 goto out;
183
184 switch (link_down->error_code) {
185 case FSF_PSQ_LINK_NO_LIGHT:
186 dev_warn(&req->adapter->ccw_device->dev,
187 "There is no light signal from the local "
188 "fibre channel cable\n");
189 break;
190 case FSF_PSQ_LINK_WRAP_PLUG:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "There is a wrap plug instead of a fibre "
193 "channel cable\n");
194 break;
195 case FSF_PSQ_LINK_NO_FCP:
196 dev_warn(&req->adapter->ccw_device->dev,
197 "The adjacent fibre channel node does not "
198 "support FCP\n");
199 break;
200 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
201 dev_warn(&req->adapter->ccw_device->dev,
202 "The FCP device is suspended because of a "
203 "firmware update\n");
204 break;
205 case FSF_PSQ_LINK_INVALID_WWPN:
206 dev_warn(&req->adapter->ccw_device->dev,
207 "The FCP device detected a WWPN that is "
208 "duplicate or not valid\n");
209 break;
210 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
211 dev_warn(&req->adapter->ccw_device->dev,
212 "The fibre channel fabric does not support NPIV\n");
213 break;
214 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
215 dev_warn(&req->adapter->ccw_device->dev,
216 "The FCP adapter cannot support more NPIV ports\n");
217 break;
218 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
219 dev_warn(&req->adapter->ccw_device->dev,
220 "The adjacent switch cannot support "
221 "more NPIV ports\n");
222 break;
223 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
224 dev_warn(&req->adapter->ccw_device->dev,
225 "The FCP adapter could not log in to the "
226 "fibre channel fabric\n");
227 break;
228 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
229 dev_warn(&req->adapter->ccw_device->dev,
230 "The WWPN assignment file on the FCP adapter "
231 "has been damaged\n");
232 break;
233 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
234 dev_warn(&req->adapter->ccw_device->dev,
235 "The mode table on the FCP adapter "
236 "has been damaged\n");
237 break;
238 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
239 dev_warn(&req->adapter->ccw_device->dev,
240 "All NPIV ports on the FCP adapter have "
241 "been assigned\n");
242 break;
243 default:
244 dev_warn(&req->adapter->ccw_device->dev,
245 "The link between the FCP adapter and "
246 "the FC fabric is down\n");
247 }
248 out:
249 zfcp_erp_adapter_failed(adapter, id, req);
250 }
251
252 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
253 {
254 struct fsf_status_read_buffer *sr_buf = req->data;
255 struct fsf_link_down_info *ldi =
256 (struct fsf_link_down_info *) &sr_buf->payload;
257
258 switch (sr_buf->status_subtype) {
259 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
260 zfcp_fsf_link_down_info_eval(req, 38, ldi);
261 break;
262 case FSF_STATUS_READ_SUB_FDISC_FAILED:
263 zfcp_fsf_link_down_info_eval(req, 39, ldi);
264 break;
265 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
266 zfcp_fsf_link_down_info_eval(req, 40, NULL);
267 };
268 }
269
270 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
271 {
272 struct zfcp_adapter *adapter = req->adapter;
273 struct fsf_status_read_buffer *sr_buf = req->data;
274
275 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
276 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
277 mempool_free(sr_buf, adapter->pool.data_status_read);
278 zfcp_fsf_req_free(req);
279 return;
280 }
281
282 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
283
284 switch (sr_buf->status_type) {
285 case FSF_STATUS_READ_PORT_CLOSED:
286 zfcp_fsf_status_read_port_closed(req);
287 break;
288 case FSF_STATUS_READ_INCOMING_ELS:
289 zfcp_fc_incoming_els(req);
290 break;
291 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
292 break;
293 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
294 dev_warn(&adapter->ccw_device->dev,
295 "The error threshold for checksum statistics "
296 "has been exceeded\n");
297 break;
298 case FSF_STATUS_READ_LINK_DOWN:
299 zfcp_fsf_status_read_link_down(req);
300 break;
301 case FSF_STATUS_READ_LINK_UP:
302 dev_info(&adapter->ccw_device->dev,
303 "The local link has been restored\n");
304 /* All ports should be marked as ready to run again */
305 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
306 ZFCP_STATUS_COMMON_RUNNING,
307 ZFCP_SET);
308 zfcp_erp_adapter_reopen(adapter,
309 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
310 ZFCP_STATUS_COMMON_ERP_FAILED,
311 102, req);
312 break;
313 case FSF_STATUS_READ_NOTIFICATION_LOST:
314 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
315 zfcp_erp_adapter_access_changed(adapter, 135, req);
316 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
317 schedule_work(&adapter->scan_work);
318 break;
319 case FSF_STATUS_READ_CFDC_UPDATED:
320 zfcp_erp_adapter_access_changed(adapter, 136, req);
321 break;
322 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
323 adapter->adapter_features = sr_buf->payload.word[0];
324 break;
325 }
326
327 mempool_free(sr_buf, adapter->pool.data_status_read);
328 zfcp_fsf_req_free(req);
329
330 atomic_inc(&adapter->stat_miss);
331 schedule_work(&adapter->stat_work);
332 }
333
334 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
335 {
336 switch (req->qtcb->header.fsf_status_qual.word[0]) {
337 case FSF_SQ_FCP_RSP_AVAILABLE:
338 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
339 case FSF_SQ_NO_RETRY_POSSIBLE:
340 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
341 return;
342 case FSF_SQ_COMMAND_ABORTED:
343 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
344 break;
345 case FSF_SQ_NO_RECOM:
346 dev_err(&req->adapter->ccw_device->dev,
347 "The FCP adapter reported a problem "
348 "that cannot be recovered\n");
349 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
350 break;
351 }
352 /* all non-return stats set FSFREQ_ERROR*/
353 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
354 }
355
356 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
357 {
358 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
359 return;
360
361 switch (req->qtcb->header.fsf_status) {
362 case FSF_UNKNOWN_COMMAND:
363 dev_err(&req->adapter->ccw_device->dev,
364 "The FCP adapter does not recognize the command 0x%x\n",
365 req->qtcb->header.fsf_command);
366 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
367 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
368 break;
369 case FSF_ADAPTER_STATUS_AVAILABLE:
370 zfcp_fsf_fsfstatus_qual_eval(req);
371 break;
372 }
373 }
374
375 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
376 {
377 struct zfcp_adapter *adapter = req->adapter;
378 struct fsf_qtcb *qtcb = req->qtcb;
379 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
380
381 zfcp_hba_dbf_event_fsf_response(req);
382
383 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
384 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
385 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
386 return;
387 }
388
389 switch (qtcb->prefix.prot_status) {
390 case FSF_PROT_GOOD:
391 case FSF_PROT_FSF_STATUS_PRESENTED:
392 return;
393 case FSF_PROT_QTCB_VERSION_ERROR:
394 dev_err(&adapter->ccw_device->dev,
395 "QTCB version 0x%x not supported by FCP adapter "
396 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
397 psq->word[0], psq->word[1]);
398 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
399 break;
400 case FSF_PROT_ERROR_STATE:
401 case FSF_PROT_SEQ_NUMB_ERROR:
402 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
403 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
404 break;
405 case FSF_PROT_UNSUPP_QTCB_TYPE:
406 dev_err(&adapter->ccw_device->dev,
407 "The QTCB type is not supported by the FCP adapter\n");
408 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
409 break;
410 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
411 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
412 &adapter->status);
413 break;
414 case FSF_PROT_DUPLICATE_REQUEST_ID:
415 dev_err(&adapter->ccw_device->dev,
416 "0x%Lx is an ambiguous request identifier\n",
417 (unsigned long long)qtcb->bottom.support.req_handle);
418 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
419 break;
420 case FSF_PROT_LINK_DOWN:
421 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
422 /* FIXME: reopening adapter now? better wait for link up */
423 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
424 break;
425 case FSF_PROT_REEST_QUEUE:
426 /* All ports should be marked as ready to run again */
427 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
428 ZFCP_STATUS_COMMON_RUNNING,
429 ZFCP_SET);
430 zfcp_erp_adapter_reopen(adapter,
431 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
432 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
433 break;
434 default:
435 dev_err(&adapter->ccw_device->dev,
436 "0x%x is not a valid transfer protocol status\n",
437 qtcb->prefix.prot_status);
438 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
439 }
440 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
441 }
442
443 /**
444 * zfcp_fsf_req_complete - process completion of a FSF request
445 * @fsf_req: The FSF request that has been completed.
446 *
447 * When a request has been completed either from the FCP adapter,
448 * or it has been dismissed due to a queue shutdown, this function
449 * is called to process the completion status and trigger further
450 * events related to the FSF request.
451 */
452 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
453 {
454 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
455 zfcp_fsf_status_read_handler(req);
456 return;
457 }
458
459 del_timer(&req->timer);
460 zfcp_fsf_protstatus_eval(req);
461 zfcp_fsf_fsfstatus_eval(req);
462 req->handler(req);
463
464 if (req->erp_action)
465 zfcp_erp_notify(req->erp_action, 0);
466 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
467
468 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
469 zfcp_fsf_req_free(req);
470 else
471 /* notify initiator waiting for the requests completion */
472 /*
473 * FIXME: Race! We must not access fsf_req here as it might have been
474 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
475 * flag. It's an improbable case. But, we have the same paranoia for
476 * the cleanup flag already.
477 * Might better be handled using complete()?
478 * (setting the flag and doing wakeup ought to be atomic
479 * with regard to checking the flag as long as waitqueue is
480 * part of the to be released structure)
481 */
482 wake_up(&req->completion_wq);
483 }
484
485 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
486 {
487 struct fsf_qtcb_bottom_config *bottom;
488 struct zfcp_adapter *adapter = req->adapter;
489 struct Scsi_Host *shost = adapter->scsi_host;
490
491 bottom = &req->qtcb->bottom.config;
492
493 if (req->data)
494 memcpy(req->data, bottom, sizeof(*bottom));
495
496 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
497 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
498 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
499 fc_host_speed(shost) = bottom->fc_link_speed;
500 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
501
502 adapter->hydra_version = bottom->adapter_type;
503 adapter->timer_ticks = bottom->timer_interval;
504
505 if (fc_host_permanent_port_name(shost) == -1)
506 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
507
508 switch (bottom->fc_topology) {
509 case FSF_TOPO_P2P:
510 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
511 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
512 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
513 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
514 break;
515 case FSF_TOPO_FABRIC:
516 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
517 break;
518 case FSF_TOPO_AL:
519 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
520 default:
521 dev_err(&adapter->ccw_device->dev,
522 "Unknown or unsupported arbitrated loop "
523 "fibre channel topology detected\n");
524 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
525 return -EIO;
526 }
527
528 return 0;
529 }
530
531 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
532 {
533 struct zfcp_adapter *adapter = req->adapter;
534 struct fsf_qtcb *qtcb = req->qtcb;
535 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
536 struct Scsi_Host *shost = adapter->scsi_host;
537
538 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
539 return;
540
541 adapter->fsf_lic_version = bottom->lic_version;
542 adapter->adapter_features = bottom->adapter_features;
543 adapter->connection_features = bottom->connection_features;
544 adapter->peer_wwpn = 0;
545 adapter->peer_wwnn = 0;
546 adapter->peer_d_id = 0;
547
548 switch (qtcb->header.fsf_status) {
549 case FSF_GOOD:
550 if (zfcp_fsf_exchange_config_evaluate(req))
551 return;
552
553 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
554 dev_err(&adapter->ccw_device->dev,
555 "FCP adapter maximum QTCB size (%d bytes) "
556 "is too small\n",
557 bottom->max_qtcb_size);
558 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
559 return;
560 }
561 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
562 &adapter->status);
563 break;
564 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
565 fc_host_node_name(shost) = 0;
566 fc_host_port_name(shost) = 0;
567 fc_host_port_id(shost) = 0;
568 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
569 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
570 adapter->hydra_version = 0;
571
572 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
573 &adapter->status);
574
575 zfcp_fsf_link_down_info_eval(req, 42,
576 &qtcb->header.fsf_status_qual.link_down_info);
577 break;
578 default:
579 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
580 return;
581 }
582
583 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
584 adapter->hardware_version = bottom->hardware_version;
585 memcpy(fc_host_serial_number(shost), bottom->serial_number,
586 min(FC_SERIAL_NUMBER_SIZE, 17));
587 EBCASC(fc_host_serial_number(shost),
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 }
590
591 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
592 dev_err(&adapter->ccw_device->dev,
593 "The FCP adapter only supports newer "
594 "control block versions\n");
595 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
596 return;
597 }
598 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
599 dev_err(&adapter->ccw_device->dev,
600 "The FCP adapter only supports older "
601 "control block versions\n");
602 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
603 }
604 }
605
606 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
607 {
608 struct zfcp_adapter *adapter = req->adapter;
609 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
610 struct Scsi_Host *shost = adapter->scsi_host;
611
612 if (req->data)
613 memcpy(req->data, bottom, sizeof(*bottom));
614
615 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
616 fc_host_permanent_port_name(shost) = bottom->wwpn;
617 else
618 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
619 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
620 fc_host_supported_speeds(shost) = bottom->supported_speed;
621 }
622
623 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
624 {
625 struct fsf_qtcb *qtcb = req->qtcb;
626
627 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
628 return;
629
630 switch (qtcb->header.fsf_status) {
631 case FSF_GOOD:
632 zfcp_fsf_exchange_port_evaluate(req);
633 break;
634 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
635 zfcp_fsf_exchange_port_evaluate(req);
636 zfcp_fsf_link_down_info_eval(req, 43,
637 &qtcb->header.fsf_status_qual.link_down_info);
638 break;
639 }
640 }
641
642 static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
643 {
644 spin_lock_bh(&queue->lock);
645 if (atomic_read(&queue->count))
646 return 1;
647 spin_unlock_bh(&queue->lock);
648 return 0;
649 }
650
651 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
652 {
653 unsigned int count = atomic_read(&adapter->req_q.count);
654 if (!count)
655 atomic_inc(&adapter->qdio_outb_full);
656 return count > 0;
657 }
658
659 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
660 {
661 long ret;
662 struct zfcp_qdio_queue *req_q = &adapter->req_q;
663
664 spin_unlock_bh(&req_q->lock);
665 ret = wait_event_interruptible_timeout(adapter->request_wq,
666 zfcp_fsf_sbal_check(req_q), 5 * HZ);
667 if (ret > 0)
668 return 0;
669 if (!ret)
670 atomic_inc(&adapter->qdio_outb_full);
671
672 spin_lock_bh(&req_q->lock);
673 return -EIO;
674 }
675
676 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
677 {
678 struct zfcp_fsf_req *req;
679 req = mempool_alloc(pool, GFP_ATOMIC);
680 if (!req)
681 return NULL;
682 memset(req, 0, sizeof(*req));
683 return req;
684 }
685
686 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
687 {
688 struct zfcp_fsf_req_qtcb *qtcb;
689
690 if (likely(pool))
691 qtcb = mempool_alloc(pool, GFP_ATOMIC);
692 else
693 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
694 GFP_ATOMIC);
695 if (unlikely(!qtcb))
696 return NULL;
697
698 memset(qtcb, 0, sizeof(*qtcb));
699 qtcb->fsf_req.qtcb = &qtcb->qtcb;
700 qtcb->fsf_req.pool = pool;
701
702 return &qtcb->fsf_req;
703 }
704
705 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
706 u32 fsf_cmd, int req_flags,
707 mempool_t *pool)
708 {
709 struct qdio_buffer_element *sbale;
710
711 struct zfcp_fsf_req *req;
712 struct zfcp_qdio_queue *req_q = &adapter->req_q;
713
714 if (req_flags & ZFCP_REQ_NO_QTCB)
715 req = zfcp_fsf_alloc_noqtcb(pool);
716 else
717 req = zfcp_fsf_alloc_qtcb(pool);
718
719 if (unlikely(!req))
720 return ERR_PTR(-EIO);
721
722 if (adapter->req_no == 0)
723 adapter->req_no++;
724
725 INIT_LIST_HEAD(&req->list);
726 init_timer(&req->timer);
727 init_waitqueue_head(&req->completion_wq);
728
729 req->adapter = adapter;
730 req->fsf_command = fsf_cmd;
731 req->req_id = adapter->req_no++;
732 req->sbal_number = 1;
733 req->sbal_first = req_q->first;
734 req->sbal_last = req_q->first;
735 req->sbale_curr = 1;
736
737 sbale = zfcp_qdio_sbale_req(req);
738 sbale[0].addr = (void *) req->req_id;
739 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
740
741 if (likely(req->qtcb)) {
742 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
743 req->qtcb->prefix.req_id = req->req_id;
744 req->qtcb->prefix.ulp_info = 26;
745 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
746 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
747 req->qtcb->header.req_handle = req->req_id;
748 req->qtcb->header.fsf_command = req->fsf_command;
749 req->seq_no = adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
751 sbale[1].addr = (void *) req->qtcb;
752 sbale[1].length = sizeof(struct fsf_qtcb);
753 }
754
755 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
756 zfcp_fsf_req_free(req);
757 return ERR_PTR(-EIO);
758 }
759
760 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
761 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
762
763 return req;
764 }
765
766 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767 {
768 struct zfcp_adapter *adapter = req->adapter;
769 struct zfcp_qdio_queue *req_q = &adapter->req_q;
770 int idx;
771
772 /* put allocated FSF request into hash table */
773 spin_lock(&adapter->req_list_lock);
774 idx = zfcp_reqlist_hash(req->req_id);
775 list_add_tail(&req->list, &adapter->req_list[idx]);
776 spin_unlock(&adapter->req_list_lock);
777
778 req->issued = get_clock();
779 if (zfcp_qdio_send(req)) {
780 /* Queues are down..... */
781 del_timer(&req->timer);
782 spin_lock(&adapter->req_list_lock);
783 zfcp_reqlist_remove(adapter, req);
784 spin_unlock(&adapter->req_list_lock);
785 /* undo changes in request queue made for this request */
786 atomic_add(req->sbal_number, &req_q->count);
787 req_q->first -= req->sbal_number;
788 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
789 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
790 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
791 return -EIO;
792 }
793
794 /* Don't increase for unsolicited status */
795 if (req->qtcb)
796 adapter->fsf_req_seq_no++;
797
798 return 0;
799 }
800
801 /**
802 * zfcp_fsf_status_read - send status read request
803 * @adapter: pointer to struct zfcp_adapter
804 * @req_flags: request flags
805 * Returns: 0 on success, ERROR otherwise
806 */
807 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
808 {
809 struct zfcp_fsf_req *req;
810 struct fsf_status_read_buffer *sr_buf;
811 struct qdio_buffer_element *sbale;
812 int retval = -EIO;
813
814 spin_lock_bh(&adapter->req_q.lock);
815 if (zfcp_fsf_req_sbal_get(adapter))
816 goto out;
817
818 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
819 ZFCP_REQ_NO_QTCB,
820 adapter->pool.fsf_req_status_read);
821 if (IS_ERR(req)) {
822 retval = PTR_ERR(req);
823 goto out;
824 }
825
826 sbale = zfcp_qdio_sbale_req(req);
827 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
828 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
829 req->sbale_curr = 2;
830
831 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
832 if (!sr_buf) {
833 retval = -ENOMEM;
834 goto failed_buf;
835 }
836 memset(sr_buf, 0, sizeof(*sr_buf));
837 req->data = sr_buf;
838 sbale = zfcp_qdio_sbale_curr(req);
839 sbale->addr = (void *) sr_buf;
840 sbale->length = sizeof(*sr_buf);
841
842 retval = zfcp_fsf_req_send(req);
843 if (retval)
844 goto failed_req_send;
845
846 goto out;
847
848 failed_req_send:
849 mempool_free(sr_buf, adapter->pool.data_status_read);
850 failed_buf:
851 zfcp_fsf_req_free(req);
852 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
853 out:
854 spin_unlock_bh(&adapter->req_q.lock);
855 return retval;
856 }
857
858 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
859 {
860 struct zfcp_unit *unit = req->data;
861 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
862
863 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
864 return;
865
866 switch (req->qtcb->header.fsf_status) {
867 case FSF_PORT_HANDLE_NOT_VALID:
868 if (fsq->word[0] == fsq->word[1]) {
869 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
870 req);
871 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
872 }
873 break;
874 case FSF_LUN_HANDLE_NOT_VALID:
875 if (fsq->word[0] == fsq->word[1]) {
876 zfcp_erp_port_reopen(unit->port, 0, 105, req);
877 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
878 }
879 break;
880 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
881 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
882 break;
883 case FSF_PORT_BOXED:
884 zfcp_erp_port_boxed(unit->port, 47, req);
885 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
886 ZFCP_STATUS_FSFREQ_RETRY;
887 break;
888 case FSF_LUN_BOXED:
889 zfcp_erp_unit_boxed(unit, 48, req);
890 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
891 ZFCP_STATUS_FSFREQ_RETRY;
892 break;
893 case FSF_ADAPTER_STATUS_AVAILABLE:
894 switch (fsq->word[0]) {
895 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
896 zfcp_test_link(unit->port);
897 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
898 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
899 break;
900 }
901 break;
902 case FSF_GOOD:
903 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
904 break;
905 }
906 }
907
908 /**
909 * zfcp_fsf_abort_fcp_command - abort running SCSI command
910 * @old_req_id: unsigned long
911 * @adapter: pointer to struct zfcp_adapter
912 * @unit: pointer to struct zfcp_unit
913 * @req_flags: integer specifying the request flags
914 * Returns: pointer to struct zfcp_fsf_req
915 *
916 * FIXME(design): should be watched by a timeout !!!
917 */
918
919 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
920 struct zfcp_adapter *adapter,
921 struct zfcp_unit *unit,
922 int req_flags)
923 {
924 struct qdio_buffer_element *sbale;
925 struct zfcp_fsf_req *req = NULL;
926
927 spin_lock(&adapter->req_q.lock);
928 if (!zfcp_fsf_sbal_available(adapter))
929 goto out;
930 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
931 req_flags, adapter->pool.fsf_req_abort);
932 if (IS_ERR(req))
933 goto out;
934
935 if (unlikely(!(atomic_read(&unit->status) &
936 ZFCP_STATUS_COMMON_UNBLOCKED)))
937 goto out_error_free;
938
939 sbale = zfcp_qdio_sbale_req(req);
940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
942
943 req->data = unit;
944 req->handler = zfcp_fsf_abort_fcp_command_handler;
945 req->qtcb->header.lun_handle = unit->handle;
946 req->qtcb->header.port_handle = unit->port->handle;
947 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
948
949 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
950 if (!zfcp_fsf_req_send(req))
951 goto out;
952
953 out_error_free:
954 zfcp_fsf_req_free(req);
955 req = NULL;
956 out:
957 spin_unlock(&adapter->req_q.lock);
958 return req;
959 }
960
961 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
962 {
963 struct zfcp_adapter *adapter = req->adapter;
964 struct zfcp_send_ct *send_ct = req->data;
965 struct fsf_qtcb_header *header = &req->qtcb->header;
966
967 send_ct->status = -EINVAL;
968
969 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
970 goto skip_fsfstatus;
971
972 switch (header->fsf_status) {
973 case FSF_GOOD:
974 zfcp_san_dbf_event_ct_response(req);
975 send_ct->status = 0;
976 break;
977 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
978 zfcp_fsf_class_not_supp(req);
979 break;
980 case FSF_ADAPTER_STATUS_AVAILABLE:
981 switch (header->fsf_status_qual.word[0]){
982 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
984 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
985 break;
986 }
987 break;
988 case FSF_ACCESS_DENIED:
989 break;
990 case FSF_PORT_BOXED:
991 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
992 ZFCP_STATUS_FSFREQ_RETRY;
993 break;
994 case FSF_PORT_HANDLE_NOT_VALID:
995 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
996 case FSF_GENERIC_COMMAND_REJECTED:
997 case FSF_PAYLOAD_SIZE_MISMATCH:
998 case FSF_REQUEST_SIZE_TOO_LARGE:
999 case FSF_RESPONSE_SIZE_TOO_LARGE:
1000 case FSF_SBAL_MISMATCH:
1001 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1002 break;
1003 }
1004
1005 skip_fsfstatus:
1006 if (send_ct->handler)
1007 send_ct->handler(send_ct->handler_data);
1008 }
1009
1010 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1011 struct scatterlist *sg_req,
1012 struct scatterlist *sg_resp, int max_sbals)
1013 {
1014 int bytes;
1015
1016 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1017 sg_req, max_sbals);
1018 if (bytes <= 0)
1019 return -ENOMEM;
1020 req->qtcb->bottom.support.req_buf_length = bytes;
1021 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1022
1023 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1024 sg_resp, max_sbals);
1025 if (bytes <= 0)
1026 return -ENOMEM;
1027 req->qtcb->bottom.support.resp_buf_length = bytes;
1028
1029 return 0;
1030 }
1031
1032 /**
1033 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1034 * @ct: pointer to struct zfcp_send_ct with data for request
1035 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1036 * @erp_action: if non-null the Generic Service request sent within ERP
1037 */
1038 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1039 struct zfcp_erp_action *erp_action)
1040 {
1041 struct zfcp_wka_port *wka_port = ct->wka_port;
1042 struct zfcp_adapter *adapter = wka_port->adapter;
1043 struct zfcp_fsf_req *req;
1044 int ret = -EIO;
1045
1046 spin_lock_bh(&adapter->req_q.lock);
1047 if (zfcp_fsf_req_sbal_get(adapter))
1048 goto out;
1049
1050 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1051 ZFCP_REQ_AUTO_CLEANUP, pool);
1052 if (IS_ERR(req)) {
1053 ret = PTR_ERR(req);
1054 goto out;
1055 }
1056
1057 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1058 FSF_MAX_SBALS_PER_REQ);
1059 if (ret)
1060 goto failed_send;
1061
1062 req->handler = zfcp_fsf_send_ct_handler;
1063 req->qtcb->header.port_handle = wka_port->handle;
1064 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1065 req->qtcb->bottom.support.timeout = ct->timeout;
1066 req->data = ct;
1067
1068 zfcp_san_dbf_event_ct_request(req);
1069
1070 if (erp_action) {
1071 erp_action->fsf_req = req;
1072 req->erp_action = erp_action;
1073 zfcp_fsf_start_erp_timer(req);
1074 } else
1075 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1076
1077 ret = zfcp_fsf_req_send(req);
1078 if (ret)
1079 goto failed_send;
1080
1081 goto out;
1082
1083 failed_send:
1084 zfcp_fsf_req_free(req);
1085 if (erp_action)
1086 erp_action->fsf_req = NULL;
1087 out:
1088 spin_unlock_bh(&adapter->req_q.lock);
1089 return ret;
1090 }
1091
1092 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1093 {
1094 struct zfcp_send_els *send_els = req->data;
1095 struct zfcp_port *port = send_els->port;
1096 struct fsf_qtcb_header *header = &req->qtcb->header;
1097
1098 send_els->status = -EINVAL;
1099
1100 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1101 goto skip_fsfstatus;
1102
1103 switch (header->fsf_status) {
1104 case FSF_GOOD:
1105 zfcp_san_dbf_event_els_response(req);
1106 send_els->status = 0;
1107 break;
1108 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1109 zfcp_fsf_class_not_supp(req);
1110 break;
1111 case FSF_ADAPTER_STATUS_AVAILABLE:
1112 switch (header->fsf_status_qual.word[0]){
1113 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1114 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1115 zfcp_test_link(port);
1116 /*fall through */
1117 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1118 case FSF_SQ_RETRY_IF_POSSIBLE:
1119 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1120 break;
1121 }
1122 break;
1123 case FSF_ELS_COMMAND_REJECTED:
1124 case FSF_PAYLOAD_SIZE_MISMATCH:
1125 case FSF_REQUEST_SIZE_TOO_LARGE:
1126 case FSF_RESPONSE_SIZE_TOO_LARGE:
1127 break;
1128 case FSF_ACCESS_DENIED:
1129 zfcp_fsf_access_denied_port(req, port);
1130 break;
1131 case FSF_SBAL_MISMATCH:
1132 /* should never occure, avoided in zfcp_fsf_send_els */
1133 /* fall through */
1134 default:
1135 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1136 break;
1137 }
1138 skip_fsfstatus:
1139 if (send_els->handler)
1140 send_els->handler(send_els->handler_data);
1141 }
1142
1143 /**
1144 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1145 * @els: pointer to struct zfcp_send_els with data for the command
1146 */
1147 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1148 {
1149 struct zfcp_fsf_req *req;
1150 struct zfcp_adapter *adapter = els->adapter;
1151 struct fsf_qtcb_bottom_support *bottom;
1152 int ret = -EIO;
1153
1154 if (unlikely(!(atomic_read(&els->port->status) &
1155 ZFCP_STATUS_COMMON_UNBLOCKED)))
1156 return -EBUSY;
1157
1158 spin_lock(&adapter->req_q.lock);
1159 if (!zfcp_fsf_sbal_available(adapter))
1160 goto out;
1161 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1162 ZFCP_REQ_AUTO_CLEANUP, NULL);
1163 if (IS_ERR(req)) {
1164 ret = PTR_ERR(req);
1165 goto out;
1166 }
1167
1168 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1169
1170 if (ret)
1171 goto failed_send;
1172
1173 bottom = &req->qtcb->bottom.support;
1174 req->handler = zfcp_fsf_send_els_handler;
1175 bottom->d_id = els->d_id;
1176 bottom->service_class = FSF_CLASS_3;
1177 bottom->timeout = 2 * R_A_TOV;
1178 req->data = els;
1179
1180 zfcp_san_dbf_event_els_request(req);
1181
1182 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1183 ret = zfcp_fsf_req_send(req);
1184 if (ret)
1185 goto failed_send;
1186
1187 goto out;
1188
1189 failed_send:
1190 zfcp_fsf_req_free(req);
1191 out:
1192 spin_unlock(&adapter->req_q.lock);
1193 return ret;
1194 }
1195
1196 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1197 {
1198 struct qdio_buffer_element *sbale;
1199 struct zfcp_fsf_req *req;
1200 struct zfcp_adapter *adapter = erp_action->adapter;
1201 int retval = -EIO;
1202
1203 spin_lock_bh(&adapter->req_q.lock);
1204 if (!zfcp_fsf_sbal_available(adapter))
1205 goto out;
1206 req = zfcp_fsf_req_create(adapter,
1207 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1208 ZFCP_REQ_AUTO_CLEANUP,
1209 adapter->pool.fsf_req_erp);
1210 if (IS_ERR(req)) {
1211 retval = PTR_ERR(req);
1212 goto out;
1213 }
1214
1215 sbale = zfcp_qdio_sbale_req(req);
1216 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1217 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1218
1219 req->qtcb->bottom.config.feature_selection =
1220 FSF_FEATURE_CFDC |
1221 FSF_FEATURE_LUN_SHARING |
1222 FSF_FEATURE_NOTIFICATION_LOST |
1223 FSF_FEATURE_UPDATE_ALERT;
1224 req->erp_action = erp_action;
1225 req->handler = zfcp_fsf_exchange_config_data_handler;
1226 erp_action->fsf_req = req;
1227
1228 zfcp_fsf_start_erp_timer(req);
1229 retval = zfcp_fsf_req_send(req);
1230 if (retval) {
1231 zfcp_fsf_req_free(req);
1232 erp_action->fsf_req = NULL;
1233 }
1234 out:
1235 spin_unlock_bh(&adapter->req_q.lock);
1236 return retval;
1237 }
1238
1239 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1240 struct fsf_qtcb_bottom_config *data)
1241 {
1242 struct qdio_buffer_element *sbale;
1243 struct zfcp_fsf_req *req = NULL;
1244 int retval = -EIO;
1245
1246 spin_lock_bh(&adapter->req_q.lock);
1247 if (zfcp_fsf_req_sbal_get(adapter))
1248 goto out;
1249
1250 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1251 0, NULL);
1252 if (IS_ERR(req)) {
1253 retval = PTR_ERR(req);
1254 goto out;
1255 }
1256
1257 sbale = zfcp_qdio_sbale_req(req);
1258 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1259 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1260 req->handler = zfcp_fsf_exchange_config_data_handler;
1261
1262 req->qtcb->bottom.config.feature_selection =
1263 FSF_FEATURE_CFDC |
1264 FSF_FEATURE_LUN_SHARING |
1265 FSF_FEATURE_NOTIFICATION_LOST |
1266 FSF_FEATURE_UPDATE_ALERT;
1267
1268 if (data)
1269 req->data = data;
1270
1271 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1272 retval = zfcp_fsf_req_send(req);
1273 out:
1274 spin_unlock_bh(&adapter->req_q.lock);
1275 if (!retval)
1276 wait_event(req->completion_wq,
1277 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1278
1279 zfcp_fsf_req_free(req);
1280
1281 return retval;
1282 }
1283
1284 /**
1285 * zfcp_fsf_exchange_port_data - request information about local port
1286 * @erp_action: ERP action for the adapter for which port data is requested
1287 * Returns: 0 on success, error otherwise
1288 */
1289 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1290 {
1291 struct qdio_buffer_element *sbale;
1292 struct zfcp_fsf_req *req;
1293 struct zfcp_adapter *adapter = erp_action->adapter;
1294 int retval = -EIO;
1295
1296 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1297 return -EOPNOTSUPP;
1298
1299 spin_lock_bh(&adapter->req_q.lock);
1300 if (!zfcp_fsf_sbal_available(adapter))
1301 goto out;
1302 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1303 ZFCP_REQ_AUTO_CLEANUP,
1304 adapter->pool.fsf_req_erp);
1305 if (IS_ERR(req)) {
1306 retval = PTR_ERR(req);
1307 goto out;
1308 }
1309
1310 sbale = zfcp_qdio_sbale_req(req);
1311 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1312 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1313
1314 req->handler = zfcp_fsf_exchange_port_data_handler;
1315 req->erp_action = erp_action;
1316 erp_action->fsf_req = req;
1317
1318 zfcp_fsf_start_erp_timer(req);
1319 retval = zfcp_fsf_req_send(req);
1320 if (retval) {
1321 zfcp_fsf_req_free(req);
1322 erp_action->fsf_req = NULL;
1323 }
1324 out:
1325 spin_unlock_bh(&adapter->req_q.lock);
1326 return retval;
1327 }
1328
1329 /**
1330 * zfcp_fsf_exchange_port_data_sync - request information about local port
1331 * @adapter: pointer to struct zfcp_adapter
1332 * @data: pointer to struct fsf_qtcb_bottom_port
1333 * Returns: 0 on success, error otherwise
1334 */
1335 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1336 struct fsf_qtcb_bottom_port *data)
1337 {
1338 struct qdio_buffer_element *sbale;
1339 struct zfcp_fsf_req *req = NULL;
1340 int retval = -EIO;
1341
1342 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1343 return -EOPNOTSUPP;
1344
1345 spin_lock_bh(&adapter->req_q.lock);
1346 if (!zfcp_fsf_sbal_available(adapter))
1347 goto out;
1348
1349 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1350 NULL);
1351 if (IS_ERR(req)) {
1352 retval = PTR_ERR(req);
1353 goto out;
1354 }
1355
1356 if (data)
1357 req->data = data;
1358
1359 sbale = zfcp_qdio_sbale_req(req);
1360 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1361 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1362
1363 req->handler = zfcp_fsf_exchange_port_data_handler;
1364 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1365 retval = zfcp_fsf_req_send(req);
1366 out:
1367 spin_unlock_bh(&adapter->req_q.lock);
1368 if (!retval)
1369 wait_event(req->completion_wq,
1370 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1371 zfcp_fsf_req_free(req);
1372
1373 return retval;
1374 }
1375
1376 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1377 {
1378 struct zfcp_port *port = req->data;
1379 struct fsf_qtcb_header *header = &req->qtcb->header;
1380 struct fsf_plogi *plogi;
1381
1382 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1383 return;
1384
1385 switch (header->fsf_status) {
1386 case FSF_PORT_ALREADY_OPEN:
1387 break;
1388 case FSF_ACCESS_DENIED:
1389 zfcp_fsf_access_denied_port(req, port);
1390 break;
1391 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1392 dev_warn(&req->adapter->ccw_device->dev,
1393 "Not enough FCP adapter resources to open "
1394 "remote port 0x%016Lx\n",
1395 (unsigned long long)port->wwpn);
1396 zfcp_erp_port_failed(port, 31, req);
1397 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1398 break;
1399 case FSF_ADAPTER_STATUS_AVAILABLE:
1400 switch (header->fsf_status_qual.word[0]) {
1401 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1402 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1403 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1404 break;
1405 case FSF_SQ_NO_RETRY_POSSIBLE:
1406 dev_warn(&req->adapter->ccw_device->dev,
1407 "Remote port 0x%016Lx could not be opened\n",
1408 (unsigned long long)port->wwpn);
1409 zfcp_erp_port_failed(port, 32, req);
1410 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1411 break;
1412 }
1413 break;
1414 case FSF_GOOD:
1415 port->handle = header->port_handle;
1416 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1417 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1418 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1419 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1420 &port->status);
1421 /* check whether D_ID has changed during open */
1422 /*
1423 * FIXME: This check is not airtight, as the FCP channel does
1424 * not monitor closures of target port connections caused on
1425 * the remote side. Thus, they might miss out on invalidating
1426 * locally cached WWPNs (and other N_Port parameters) of gone
1427 * target ports. So, our heroic attempt to make things safe
1428 * could be undermined by 'open port' response data tagged with
1429 * obsolete WWPNs. Another reason to monitor potential
1430 * connection closures ourself at least (by interpreting
1431 * incoming ELS' and unsolicited status). It just crosses my
1432 * mind that one should be able to cross-check by means of
1433 * another GID_PN straight after a port has been opened.
1434 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1435 */
1436 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1437 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1438 if (plogi->serv_param.wwpn != port->wwpn)
1439 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1440 &port->status);
1441 else {
1442 port->wwnn = plogi->serv_param.wwnn;
1443 zfcp_fc_plogi_evaluate(port, plogi);
1444 }
1445 }
1446 break;
1447 case FSF_UNKNOWN_OP_SUBTYPE:
1448 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1449 break;
1450 }
1451 }
1452
1453 /**
1454 * zfcp_fsf_open_port - create and send open port request
1455 * @erp_action: pointer to struct zfcp_erp_action
1456 * Returns: 0 on success, error otherwise
1457 */
1458 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1459 {
1460 struct qdio_buffer_element *sbale;
1461 struct zfcp_adapter *adapter = erp_action->adapter;
1462 struct zfcp_fsf_req *req;
1463 int retval = -EIO;
1464
1465 spin_lock_bh(&adapter->req_q.lock);
1466 if (zfcp_fsf_req_sbal_get(adapter))
1467 goto out;
1468
1469 req = zfcp_fsf_req_create(adapter,
1470 FSF_QTCB_OPEN_PORT_WITH_DID,
1471 ZFCP_REQ_AUTO_CLEANUP,
1472 adapter->pool.fsf_req_erp);
1473 if (IS_ERR(req)) {
1474 retval = PTR_ERR(req);
1475 goto out;
1476 }
1477
1478 sbale = zfcp_qdio_sbale_req(req);
1479 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1480 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1481
1482 req->handler = zfcp_fsf_open_port_handler;
1483 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1484 req->data = erp_action->port;
1485 req->erp_action = erp_action;
1486 erp_action->fsf_req = req;
1487
1488 zfcp_fsf_start_erp_timer(req);
1489 retval = zfcp_fsf_req_send(req);
1490 if (retval) {
1491 zfcp_fsf_req_free(req);
1492 erp_action->fsf_req = NULL;
1493 }
1494 out:
1495 spin_unlock_bh(&adapter->req_q.lock);
1496 return retval;
1497 }
1498
1499 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1500 {
1501 struct zfcp_port *port = req->data;
1502
1503 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1504 return;
1505
1506 switch (req->qtcb->header.fsf_status) {
1507 case FSF_PORT_HANDLE_NOT_VALID:
1508 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1509 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1510 break;
1511 case FSF_ADAPTER_STATUS_AVAILABLE:
1512 break;
1513 case FSF_GOOD:
1514 zfcp_erp_modify_port_status(port, 33, req,
1515 ZFCP_STATUS_COMMON_OPEN,
1516 ZFCP_CLEAR);
1517 break;
1518 }
1519 }
1520
1521 /**
1522 * zfcp_fsf_close_port - create and send close port request
1523 * @erp_action: pointer to struct zfcp_erp_action
1524 * Returns: 0 on success, error otherwise
1525 */
1526 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1527 {
1528 struct qdio_buffer_element *sbale;
1529 struct zfcp_adapter *adapter = erp_action->adapter;
1530 struct zfcp_fsf_req *req;
1531 int retval = -EIO;
1532
1533 spin_lock_bh(&adapter->req_q.lock);
1534 if (zfcp_fsf_req_sbal_get(adapter))
1535 goto out;
1536
1537 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1538 ZFCP_REQ_AUTO_CLEANUP,
1539 adapter->pool.fsf_req_erp);
1540 if (IS_ERR(req)) {
1541 retval = PTR_ERR(req);
1542 goto out;
1543 }
1544
1545 sbale = zfcp_qdio_sbale_req(req);
1546 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1547 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1548
1549 req->handler = zfcp_fsf_close_port_handler;
1550 req->data = erp_action->port;
1551 req->erp_action = erp_action;
1552 req->qtcb->header.port_handle = erp_action->port->handle;
1553 erp_action->fsf_req = req;
1554
1555 zfcp_fsf_start_erp_timer(req);
1556 retval = zfcp_fsf_req_send(req);
1557 if (retval) {
1558 zfcp_fsf_req_free(req);
1559 erp_action->fsf_req = NULL;
1560 }
1561 out:
1562 spin_unlock_bh(&adapter->req_q.lock);
1563 return retval;
1564 }
1565
1566 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1567 {
1568 struct zfcp_wka_port *wka_port = req->data;
1569 struct fsf_qtcb_header *header = &req->qtcb->header;
1570
1571 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1572 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1573 goto out;
1574 }
1575
1576 switch (header->fsf_status) {
1577 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1578 dev_warn(&req->adapter->ccw_device->dev,
1579 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1580 case FSF_ADAPTER_STATUS_AVAILABLE:
1581 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1582 case FSF_ACCESS_DENIED:
1583 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1584 break;
1585 case FSF_PORT_ALREADY_OPEN:
1586 case FSF_GOOD:
1587 wka_port->handle = header->port_handle;
1588 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1589 }
1590 out:
1591 wake_up(&wka_port->completion_wq);
1592 }
1593
1594 /**
1595 * zfcp_fsf_open_wka_port - create and send open wka-port request
1596 * @wka_port: pointer to struct zfcp_wka_port
1597 * Returns: 0 on success, error otherwise
1598 */
1599 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1600 {
1601 struct qdio_buffer_element *sbale;
1602 struct zfcp_adapter *adapter = wka_port->adapter;
1603 struct zfcp_fsf_req *req;
1604 int retval = -EIO;
1605
1606 spin_lock_bh(&adapter->req_q.lock);
1607 if (zfcp_fsf_req_sbal_get(adapter))
1608 goto out;
1609
1610 req = zfcp_fsf_req_create(adapter,
1611 FSF_QTCB_OPEN_PORT_WITH_DID,
1612 ZFCP_REQ_AUTO_CLEANUP,
1613 adapter->pool.fsf_req_erp);
1614 if (unlikely(IS_ERR(req))) {
1615 retval = PTR_ERR(req);
1616 goto out;
1617 }
1618
1619 sbale = zfcp_qdio_sbale_req(req);
1620 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1621 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1622
1623 req->handler = zfcp_fsf_open_wka_port_handler;
1624 req->qtcb->bottom.support.d_id = wka_port->d_id;
1625 req->data = wka_port;
1626
1627 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1628 retval = zfcp_fsf_req_send(req);
1629 if (retval)
1630 zfcp_fsf_req_free(req);
1631 out:
1632 spin_unlock_bh(&adapter->req_q.lock);
1633 return retval;
1634 }
1635
1636 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1637 {
1638 struct zfcp_wka_port *wka_port = req->data;
1639
1640 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1641 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1642 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 107, req);
1643 }
1644
1645 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1646 wake_up(&wka_port->completion_wq);
1647 }
1648
1649 /**
1650 * zfcp_fsf_close_wka_port - create and send close wka port request
1651 * @erp_action: pointer to struct zfcp_erp_action
1652 * Returns: 0 on success, error otherwise
1653 */
1654 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1655 {
1656 struct qdio_buffer_element *sbale;
1657 struct zfcp_adapter *adapter = wka_port->adapter;
1658 struct zfcp_fsf_req *req;
1659 int retval = -EIO;
1660
1661 spin_lock_bh(&adapter->req_q.lock);
1662 if (zfcp_fsf_req_sbal_get(adapter))
1663 goto out;
1664
1665 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1666 ZFCP_REQ_AUTO_CLEANUP,
1667 adapter->pool.fsf_req_erp);
1668 if (unlikely(IS_ERR(req))) {
1669 retval = PTR_ERR(req);
1670 goto out;
1671 }
1672
1673 sbale = zfcp_qdio_sbale_req(req);
1674 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1675 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1676
1677 req->handler = zfcp_fsf_close_wka_port_handler;
1678 req->data = wka_port;
1679 req->qtcb->header.port_handle = wka_port->handle;
1680
1681 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1682 retval = zfcp_fsf_req_send(req);
1683 if (retval)
1684 zfcp_fsf_req_free(req);
1685 out:
1686 spin_unlock_bh(&adapter->req_q.lock);
1687 return retval;
1688 }
1689
1690 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1691 {
1692 struct zfcp_port *port = req->data;
1693 struct fsf_qtcb_header *header = &req->qtcb->header;
1694 struct zfcp_unit *unit;
1695
1696 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1697 goto skip_fsfstatus;
1698
1699 switch (header->fsf_status) {
1700 case FSF_PORT_HANDLE_NOT_VALID:
1701 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1702 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1703 break;
1704 case FSF_ACCESS_DENIED:
1705 zfcp_fsf_access_denied_port(req, port);
1706 break;
1707 case FSF_PORT_BOXED:
1708 zfcp_erp_port_boxed(port, 50, req);
1709 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1710 ZFCP_STATUS_FSFREQ_RETRY;
1711 /* can't use generic zfcp_erp_modify_port_status because
1712 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1713 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1714 list_for_each_entry(unit, &port->unit_list_head, list)
1715 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1716 &unit->status);
1717 break;
1718 case FSF_ADAPTER_STATUS_AVAILABLE:
1719 switch (header->fsf_status_qual.word[0]) {
1720 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1721 /* fall through */
1722 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1723 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1724 break;
1725 }
1726 break;
1727 case FSF_GOOD:
1728 /* can't use generic zfcp_erp_modify_port_status because
1729 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1730 */
1731 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1732 list_for_each_entry(unit, &port->unit_list_head, list)
1733 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1734 &unit->status);
1735 break;
1736 }
1737 skip_fsfstatus:
1738 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1739 }
1740
1741 /**
1742 * zfcp_fsf_close_physical_port - close physical port
1743 * @erp_action: pointer to struct zfcp_erp_action
1744 * Returns: 0 on success
1745 */
1746 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1747 {
1748 struct qdio_buffer_element *sbale;
1749 struct zfcp_adapter *adapter = erp_action->adapter;
1750 struct zfcp_fsf_req *req;
1751 int retval = -EIO;
1752
1753 spin_lock_bh(&adapter->req_q.lock);
1754 if (zfcp_fsf_req_sbal_get(adapter))
1755 goto out;
1756
1757 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1758 ZFCP_REQ_AUTO_CLEANUP,
1759 adapter->pool.fsf_req_erp);
1760 if (IS_ERR(req)) {
1761 retval = PTR_ERR(req);
1762 goto out;
1763 }
1764
1765 sbale = zfcp_qdio_sbale_req(req);
1766 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1767 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1768
1769 req->data = erp_action->port;
1770 req->qtcb->header.port_handle = erp_action->port->handle;
1771 req->erp_action = erp_action;
1772 req->handler = zfcp_fsf_close_physical_port_handler;
1773 erp_action->fsf_req = req;
1774 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1775 &erp_action->port->status);
1776
1777 zfcp_fsf_start_erp_timer(req);
1778 retval = zfcp_fsf_req_send(req);
1779 if (retval) {
1780 zfcp_fsf_req_free(req);
1781 erp_action->fsf_req = NULL;
1782 }
1783 out:
1784 spin_unlock_bh(&adapter->req_q.lock);
1785 return retval;
1786 }
1787
1788 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1789 {
1790 struct zfcp_adapter *adapter = req->adapter;
1791 struct zfcp_unit *unit = req->data;
1792 struct fsf_qtcb_header *header = &req->qtcb->header;
1793 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1794 struct fsf_queue_designator *queue_designator =
1795 &header->fsf_status_qual.fsf_queue_designator;
1796 int exclusive, readwrite;
1797
1798 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1799 return;
1800
1801 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1802 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1803 ZFCP_STATUS_UNIT_SHARED |
1804 ZFCP_STATUS_UNIT_READONLY,
1805 &unit->status);
1806
1807 switch (header->fsf_status) {
1808
1809 case FSF_PORT_HANDLE_NOT_VALID:
1810 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1811 /* fall through */
1812 case FSF_LUN_ALREADY_OPEN:
1813 break;
1814 case FSF_ACCESS_DENIED:
1815 zfcp_fsf_access_denied_unit(req, unit);
1816 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1817 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1818 break;
1819 case FSF_PORT_BOXED:
1820 zfcp_erp_port_boxed(unit->port, 51, req);
1821 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1822 ZFCP_STATUS_FSFREQ_RETRY;
1823 break;
1824 case FSF_LUN_SHARING_VIOLATION:
1825 if (header->fsf_status_qual.word[0])
1826 dev_warn(&adapter->ccw_device->dev,
1827 "LUN 0x%Lx on port 0x%Lx is already in "
1828 "use by CSS%d, MIF Image ID %x\n",
1829 (unsigned long long)unit->fcp_lun,
1830 (unsigned long long)unit->port->wwpn,
1831 queue_designator->cssid,
1832 queue_designator->hla);
1833 else
1834 zfcp_act_eval_err(adapter,
1835 header->fsf_status_qual.word[2]);
1836 zfcp_erp_unit_access_denied(unit, 60, req);
1837 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1838 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1839 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1840 break;
1841 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1842 dev_warn(&adapter->ccw_device->dev,
1843 "No handle is available for LUN "
1844 "0x%016Lx on port 0x%016Lx\n",
1845 (unsigned long long)unit->fcp_lun,
1846 (unsigned long long)unit->port->wwpn);
1847 zfcp_erp_unit_failed(unit, 34, req);
1848 /* fall through */
1849 case FSF_INVALID_COMMAND_OPTION:
1850 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1851 break;
1852 case FSF_ADAPTER_STATUS_AVAILABLE:
1853 switch (header->fsf_status_qual.word[0]) {
1854 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1855 zfcp_test_link(unit->port);
1856 /* fall through */
1857 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1858 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1859 break;
1860 }
1861 break;
1862
1863 case FSF_GOOD:
1864 unit->handle = header->lun_handle;
1865 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1866
1867 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1868 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1869 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1870 exclusive = (bottom->lun_access_info &
1871 FSF_UNIT_ACCESS_EXCLUSIVE);
1872 readwrite = (bottom->lun_access_info &
1873 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1874
1875 if (!exclusive)
1876 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1877 &unit->status);
1878
1879 if (!readwrite) {
1880 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1881 &unit->status);
1882 dev_info(&adapter->ccw_device->dev,
1883 "SCSI device at LUN 0x%016Lx on port "
1884 "0x%016Lx opened read-only\n",
1885 (unsigned long long)unit->fcp_lun,
1886 (unsigned long long)unit->port->wwpn);
1887 }
1888
1889 if (exclusive && !readwrite) {
1890 dev_err(&adapter->ccw_device->dev,
1891 "Exclusive read-only access not "
1892 "supported (unit 0x%016Lx, "
1893 "port 0x%016Lx)\n",
1894 (unsigned long long)unit->fcp_lun,
1895 (unsigned long long)unit->port->wwpn);
1896 zfcp_erp_unit_failed(unit, 35, req);
1897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1899 } else if (!exclusive && readwrite) {
1900 dev_err(&adapter->ccw_device->dev,
1901 "Shared read-write access not "
1902 "supported (unit 0x%016Lx, port "
1903 "0x%016Lx\n)",
1904 (unsigned long long)unit->fcp_lun,
1905 (unsigned long long)unit->port->wwpn);
1906 zfcp_erp_unit_failed(unit, 36, req);
1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1909 }
1910 }
1911 break;
1912 }
1913 }
1914
1915 /**
1916 * zfcp_fsf_open_unit - open unit
1917 * @erp_action: pointer to struct zfcp_erp_action
1918 * Returns: 0 on success, error otherwise
1919 */
1920 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1921 {
1922 struct qdio_buffer_element *sbale;
1923 struct zfcp_adapter *adapter = erp_action->adapter;
1924 struct zfcp_fsf_req *req;
1925 int retval = -EIO;
1926
1927 spin_lock_bh(&adapter->req_q.lock);
1928 if (zfcp_fsf_req_sbal_get(adapter))
1929 goto out;
1930
1931 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1932 ZFCP_REQ_AUTO_CLEANUP,
1933 adapter->pool.fsf_req_erp);
1934 if (IS_ERR(req)) {
1935 retval = PTR_ERR(req);
1936 goto out;
1937 }
1938
1939 sbale = zfcp_qdio_sbale_req(req);
1940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1942
1943 req->qtcb->header.port_handle = erp_action->port->handle;
1944 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1945 req->handler = zfcp_fsf_open_unit_handler;
1946 req->data = erp_action->unit;
1947 req->erp_action = erp_action;
1948 erp_action->fsf_req = req;
1949
1950 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1951 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1952
1953 zfcp_fsf_start_erp_timer(req);
1954 retval = zfcp_fsf_req_send(req);
1955 if (retval) {
1956 zfcp_fsf_req_free(req);
1957 erp_action->fsf_req = NULL;
1958 }
1959 out:
1960 spin_unlock_bh(&adapter->req_q.lock);
1961 return retval;
1962 }
1963
1964 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1965 {
1966 struct zfcp_unit *unit = req->data;
1967
1968 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1969 return;
1970
1971 switch (req->qtcb->header.fsf_status) {
1972 case FSF_PORT_HANDLE_NOT_VALID:
1973 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1974 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1975 break;
1976 case FSF_LUN_HANDLE_NOT_VALID:
1977 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1978 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1979 break;
1980 case FSF_PORT_BOXED:
1981 zfcp_erp_port_boxed(unit->port, 52, req);
1982 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1983 ZFCP_STATUS_FSFREQ_RETRY;
1984 break;
1985 case FSF_ADAPTER_STATUS_AVAILABLE:
1986 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1987 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1988 zfcp_test_link(unit->port);
1989 /* fall through */
1990 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1991 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1992 break;
1993 }
1994 break;
1995 case FSF_GOOD:
1996 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1997 break;
1998 }
1999 }
2000
2001 /**
2002 * zfcp_fsf_close_unit - close zfcp unit
2003 * @erp_action: pointer to struct zfcp_unit
2004 * Returns: 0 on success, error otherwise
2005 */
2006 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2007 {
2008 struct qdio_buffer_element *sbale;
2009 struct zfcp_adapter *adapter = erp_action->adapter;
2010 struct zfcp_fsf_req *req;
2011 int retval = -EIO;
2012
2013 spin_lock_bh(&adapter->req_q.lock);
2014 if (zfcp_fsf_req_sbal_get(adapter))
2015 goto out;
2016 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2017 ZFCP_REQ_AUTO_CLEANUP,
2018 adapter->pool.fsf_req_erp);
2019 if (IS_ERR(req)) {
2020 retval = PTR_ERR(req);
2021 goto out;
2022 }
2023
2024 sbale = zfcp_qdio_sbale_req(req);
2025 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2026 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2027
2028 req->qtcb->header.port_handle = erp_action->port->handle;
2029 req->qtcb->header.lun_handle = erp_action->unit->handle;
2030 req->handler = zfcp_fsf_close_unit_handler;
2031 req->data = erp_action->unit;
2032 req->erp_action = erp_action;
2033 erp_action->fsf_req = req;
2034
2035 zfcp_fsf_start_erp_timer(req);
2036 retval = zfcp_fsf_req_send(req);
2037 if (retval) {
2038 zfcp_fsf_req_free(req);
2039 erp_action->fsf_req = NULL;
2040 }
2041 out:
2042 spin_unlock_bh(&adapter->req_q.lock);
2043 return retval;
2044 }
2045
2046 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2047 {
2048 lat_rec->sum += lat;
2049 lat_rec->min = min(lat_rec->min, lat);
2050 lat_rec->max = max(lat_rec->max, lat);
2051 }
2052
2053 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2054 {
2055 struct fsf_qual_latency_info *lat_inf;
2056 struct latency_cont *lat;
2057 struct zfcp_unit *unit = req->unit;
2058 unsigned long flags;
2059
2060 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2061
2062 switch (req->qtcb->bottom.io.data_direction) {
2063 case FSF_DATADIR_READ:
2064 lat = &unit->latencies.read;
2065 break;
2066 case FSF_DATADIR_WRITE:
2067 lat = &unit->latencies.write;
2068 break;
2069 case FSF_DATADIR_CMND:
2070 lat = &unit->latencies.cmd;
2071 break;
2072 default:
2073 return;
2074 }
2075
2076 spin_lock_irqsave(&unit->latencies.lock, flags);
2077 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2078 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2079 lat->counter++;
2080 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2081 }
2082
2083 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2084 {
2085 struct scsi_cmnd *scpnt = req->data;
2086 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2087 &(req->qtcb->bottom.io.fcp_rsp);
2088 u32 sns_len;
2089 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2090 unsigned long flags;
2091
2092 if (unlikely(!scpnt))
2093 return;
2094
2095 read_lock_irqsave(&req->adapter->abort_lock, flags);
2096
2097 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2098 set_host_byte(scpnt, DID_SOFT_ERROR);
2099 set_driver_byte(scpnt, SUGGEST_RETRY);
2100 goto skip_fsfstatus;
2101 }
2102
2103 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2104 set_host_byte(scpnt, DID_ERROR);
2105 goto skip_fsfstatus;
2106 }
2107
2108 set_msg_byte(scpnt, COMMAND_COMPLETE);
2109
2110 scpnt->result |= fcp_rsp_iu->scsi_status;
2111
2112 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2113 zfcp_fsf_req_latency(req);
2114
2115 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2116 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2117 set_host_byte(scpnt, DID_OK);
2118 else {
2119 set_host_byte(scpnt, DID_ERROR);
2120 goto skip_fsfstatus;
2121 }
2122 }
2123
2124 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2125 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2126 fcp_rsp_iu->fcp_rsp_len;
2127 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2128 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2129
2130 memcpy(scpnt->sense_buffer,
2131 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2132 }
2133
2134 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2135 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2136 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2137 scpnt->underflow)
2138 set_host_byte(scpnt, DID_ERROR);
2139 }
2140 skip_fsfstatus:
2141 if (scpnt->result != 0)
2142 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2143 else if (scpnt->retries > 0)
2144 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2145 else
2146 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2147
2148 scpnt->host_scribble = NULL;
2149 (scpnt->scsi_done) (scpnt);
2150 /*
2151 * We must hold this lock until scsi_done has been called.
2152 * Otherwise we may call scsi_done after abort regarding this
2153 * command has completed.
2154 * Note: scsi_done must not block!
2155 */
2156 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2157 }
2158
2159 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2160 {
2161 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2162 &(req->qtcb->bottom.io.fcp_rsp);
2163 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2164
2165 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2166 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2167 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2168 }
2169
2170
2171 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2172 {
2173 struct zfcp_unit *unit;
2174 struct fsf_qtcb_header *header = &req->qtcb->header;
2175
2176 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2177 unit = req->data;
2178 else
2179 unit = req->unit;
2180
2181 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2182 goto skip_fsfstatus;
2183
2184 switch (header->fsf_status) {
2185 case FSF_HANDLE_MISMATCH:
2186 case FSF_PORT_HANDLE_NOT_VALID:
2187 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2188 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2189 break;
2190 case FSF_FCPLUN_NOT_VALID:
2191 case FSF_LUN_HANDLE_NOT_VALID:
2192 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2193 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2194 break;
2195 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2196 zfcp_fsf_class_not_supp(req);
2197 break;
2198 case FSF_ACCESS_DENIED:
2199 zfcp_fsf_access_denied_unit(req, unit);
2200 break;
2201 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2202 dev_err(&req->adapter->ccw_device->dev,
2203 "Incorrect direction %d, unit 0x%016Lx on port "
2204 "0x%016Lx closed\n",
2205 req->qtcb->bottom.io.data_direction,
2206 (unsigned long long)unit->fcp_lun,
2207 (unsigned long long)unit->port->wwpn);
2208 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2209 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2210 break;
2211 case FSF_CMND_LENGTH_NOT_VALID:
2212 dev_err(&req->adapter->ccw_device->dev,
2213 "Incorrect CDB length %d, unit 0x%016Lx on "
2214 "port 0x%016Lx closed\n",
2215 req->qtcb->bottom.io.fcp_cmnd_length,
2216 (unsigned long long)unit->fcp_lun,
2217 (unsigned long long)unit->port->wwpn);
2218 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2219 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2220 break;
2221 case FSF_PORT_BOXED:
2222 zfcp_erp_port_boxed(unit->port, 53, req);
2223 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2224 ZFCP_STATUS_FSFREQ_RETRY;
2225 break;
2226 case FSF_LUN_BOXED:
2227 zfcp_erp_unit_boxed(unit, 54, req);
2228 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2229 ZFCP_STATUS_FSFREQ_RETRY;
2230 break;
2231 case FSF_ADAPTER_STATUS_AVAILABLE:
2232 if (header->fsf_status_qual.word[0] ==
2233 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2234 zfcp_test_link(unit->port);
2235 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2236 break;
2237 }
2238 skip_fsfstatus:
2239 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2240 zfcp_fsf_send_fcp_ctm_handler(req);
2241 else {
2242 zfcp_fsf_send_fcp_command_task_handler(req);
2243 req->unit = NULL;
2244 zfcp_unit_put(unit);
2245 }
2246 }
2247
2248 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2249 {
2250 u32 *fcp_dl_ptr;
2251
2252 /*
2253 * fcp_dl_addr = start address of fcp_cmnd structure +
2254 * size of fixed part + size of dynamically sized add_dcp_cdb field
2255 * SEE FCP-2 documentation
2256 */
2257 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2258 (fcp_cmd->add_fcp_cdb_length << 2));
2259 *fcp_dl_ptr = fcp_dl;
2260 }
2261
2262 /**
2263 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2264 * @adapter: adapter where scsi command is issued
2265 * @unit: unit where command is sent to
2266 * @scsi_cmnd: scsi command to be sent
2267 * @timer: timer to be started when request is initiated
2268 * @req_flags: flags for fsf_request
2269 */
2270 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2271 struct zfcp_unit *unit,
2272 struct scsi_cmnd *scsi_cmnd,
2273 int use_timer, int req_flags)
2274 {
2275 struct zfcp_fsf_req *req;
2276 struct fcp_cmnd_iu *fcp_cmnd_iu;
2277 unsigned int sbtype;
2278 int real_bytes, retval = -EIO;
2279
2280 if (unlikely(!(atomic_read(&unit->status) &
2281 ZFCP_STATUS_COMMON_UNBLOCKED)))
2282 return -EBUSY;
2283
2284 spin_lock(&adapter->req_q.lock);
2285 if (!zfcp_fsf_sbal_available(adapter))
2286 goto out;
2287 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2288 adapter->pool.fsf_req_scsi);
2289 if (IS_ERR(req)) {
2290 retval = PTR_ERR(req);
2291 goto out;
2292 }
2293
2294 zfcp_unit_get(unit);
2295 req->unit = unit;
2296 req->data = scsi_cmnd;
2297 req->handler = zfcp_fsf_send_fcp_command_handler;
2298 req->qtcb->header.lun_handle = unit->handle;
2299 req->qtcb->header.port_handle = unit->port->handle;
2300 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2301
2302 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2303
2304 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2305 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2306 /*
2307 * set depending on data direction:
2308 * data direction bits in SBALE (SB Type)
2309 * data direction bits in QTCB
2310 * data direction bits in FCP_CMND IU
2311 */
2312 switch (scsi_cmnd->sc_data_direction) {
2313 case DMA_NONE:
2314 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2315 sbtype = SBAL_FLAGS0_TYPE_READ;
2316 break;
2317 case DMA_FROM_DEVICE:
2318 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2319 sbtype = SBAL_FLAGS0_TYPE_READ;
2320 fcp_cmnd_iu->rddata = 1;
2321 break;
2322 case DMA_TO_DEVICE:
2323 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2324 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2325 fcp_cmnd_iu->wddata = 1;
2326 break;
2327 case DMA_BIDIRECTIONAL:
2328 default:
2329 retval = -EIO;
2330 goto failed_scsi_cmnd;
2331 }
2332
2333 if (likely((scsi_cmnd->device->simple_tags) ||
2334 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2335 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2336 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2337 else
2338 fcp_cmnd_iu->task_attribute = UNTAGGED;
2339
2340 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2341 fcp_cmnd_iu->add_fcp_cdb_length =
2342 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2343
2344 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2345
2346 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2347 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2348
2349 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2350 scsi_sglist(scsi_cmnd),
2351 FSF_MAX_SBALS_PER_REQ);
2352 if (unlikely(real_bytes < 0)) {
2353 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2354 retval = -EIO;
2355 else {
2356 dev_err(&adapter->ccw_device->dev,
2357 "Oversize data package, unit 0x%016Lx "
2358 "on port 0x%016Lx closed\n",
2359 (unsigned long long)unit->fcp_lun,
2360 (unsigned long long)unit->port->wwpn);
2361 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2362 retval = -EINVAL;
2363 }
2364 goto failed_scsi_cmnd;
2365 }
2366
2367 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2368
2369 if (use_timer)
2370 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2371
2372 retval = zfcp_fsf_req_send(req);
2373 if (unlikely(retval))
2374 goto failed_scsi_cmnd;
2375
2376 goto out;
2377
2378 failed_scsi_cmnd:
2379 zfcp_unit_put(unit);
2380 zfcp_fsf_req_free(req);
2381 scsi_cmnd->host_scribble = NULL;
2382 out:
2383 spin_unlock(&adapter->req_q.lock);
2384 return retval;
2385 }
2386
2387 /**
2388 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2389 * @adapter: pointer to struct zfcp-adapter
2390 * @unit: pointer to struct zfcp_unit
2391 * @tm_flags: unsigned byte for task management flags
2392 * @req_flags: int request flags
2393 * Returns: on success pointer to struct fsf_req, NULL otherwise
2394 */
2395 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2396 struct zfcp_unit *unit,
2397 u8 tm_flags, int req_flags)
2398 {
2399 struct qdio_buffer_element *sbale;
2400 struct zfcp_fsf_req *req = NULL;
2401 struct fcp_cmnd_iu *fcp_cmnd_iu;
2402
2403 if (unlikely(!(atomic_read(&unit->status) &
2404 ZFCP_STATUS_COMMON_UNBLOCKED)))
2405 return NULL;
2406
2407 spin_lock(&adapter->req_q.lock);
2408 if (!zfcp_fsf_sbal_available(adapter))
2409 goto out;
2410 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2411 adapter->pool.fsf_req_scsi);
2412 if (IS_ERR(req))
2413 goto out;
2414
2415 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2416 req->data = unit;
2417 req->handler = zfcp_fsf_send_fcp_command_handler;
2418 req->qtcb->header.lun_handle = unit->handle;
2419 req->qtcb->header.port_handle = unit->port->handle;
2420 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2421 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2422 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2423 sizeof(u32);
2424
2425 sbale = zfcp_qdio_sbale_req(req);
2426 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2427 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2428
2429 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2430 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2431 fcp_cmnd_iu->task_management_flags = tm_flags;
2432
2433 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2434 if (!zfcp_fsf_req_send(req))
2435 goto out;
2436
2437 zfcp_fsf_req_free(req);
2438 req = NULL;
2439 out:
2440 spin_unlock(&adapter->req_q.lock);
2441 return req;
2442 }
2443
2444 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2445 {
2446 if (req->qtcb->header.fsf_status != FSF_GOOD)
2447 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2448 }
2449
2450 /**
2451 * zfcp_fsf_control_file - control file upload/download
2452 * @adapter: pointer to struct zfcp_adapter
2453 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2454 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2455 */
2456 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2457 struct zfcp_fsf_cfdc *fsf_cfdc)
2458 {
2459 struct qdio_buffer_element *sbale;
2460 struct zfcp_fsf_req *req = NULL;
2461 struct fsf_qtcb_bottom_support *bottom;
2462 int direction, retval = -EIO, bytes;
2463
2464 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2465 return ERR_PTR(-EOPNOTSUPP);
2466
2467 switch (fsf_cfdc->command) {
2468 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2469 direction = SBAL_FLAGS0_TYPE_WRITE;
2470 break;
2471 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2472 direction = SBAL_FLAGS0_TYPE_READ;
2473 break;
2474 default:
2475 return ERR_PTR(-EINVAL);
2476 }
2477
2478 spin_lock_bh(&adapter->req_q.lock);
2479 if (zfcp_fsf_req_sbal_get(adapter))
2480 goto out;
2481
2482 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2483 if (IS_ERR(req)) {
2484 retval = -EPERM;
2485 goto out;
2486 }
2487
2488 req->handler = zfcp_fsf_control_file_handler;
2489
2490 sbale = zfcp_qdio_sbale_req(req);
2491 sbale[0].flags |= direction;
2492
2493 bottom = &req->qtcb->bottom.support;
2494 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2495 bottom->option = fsf_cfdc->option;
2496
2497 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2498 FSF_MAX_SBALS_PER_REQ);
2499 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2500 retval = -ENOMEM;
2501 zfcp_fsf_req_free(req);
2502 goto out;
2503 }
2504
2505 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2506 retval = zfcp_fsf_req_send(req);
2507 out:
2508 spin_unlock_bh(&adapter->req_q.lock);
2509
2510 if (!retval) {
2511 wait_event(req->completion_wq,
2512 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2513 return req;
2514 }
2515 return ERR_PTR(retval);
2516 }
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