projects / deliverable / linux.git / blob
? search:


5b73f989a62908c813b4961b0036f830f225a0fe
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2009
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include "zfcp_ext.h"
14 #include "zfcp_dbf.h"
15
16 static void zfcp_fsf_request_timeout_handler(unsigned long data)
17 {
18 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
19 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
20 "fsrth_1", NULL);
21 }
22
23 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
24 unsigned long timeout)
25 {
26 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
27 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
28 fsf_req->timer.expires = jiffies + timeout;
29 add_timer(&fsf_req->timer);
30 }
31
32 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
33 {
34 BUG_ON(!fsf_req->erp_action);
35 fsf_req->timer.function = zfcp_erp_timeout_handler;
36 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
37 fsf_req->timer.expires = jiffies + 30 * HZ;
38 add_timer(&fsf_req->timer);
39 }
40
41 /* association between FSF command and FSF QTCB type */
42 static u32 fsf_qtcb_type[] = {
43 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
44 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
53 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
54 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
56 };
57
58 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
59 {
60 u16 subtable = table >> 16;
61 u16 rule = table & 0xffff;
62 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
63
64 if (subtable && subtable < ARRAY_SIZE(act_type))
65 dev_warn(&adapter->ccw_device->dev,
66 "Access denied according to ACT rule type %s, "
67 "rule %d\n", act_type[subtable], rule);
68 }
69
70 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
71 struct zfcp_port *port)
72 {
73 struct fsf_qtcb_header *header = &req->qtcb->header;
74 dev_warn(&req->adapter->ccw_device->dev,
75 "Access denied to port 0x%016Lx\n",
76 (unsigned long long)port->wwpn);
77 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
78 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
79 zfcp_erp_port_access_denied(port, "fspad_1", req);
80 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
81 }
82
83 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
84 struct zfcp_unit *unit)
85 {
86 struct fsf_qtcb_header *header = &req->qtcb->header;
87 dev_warn(&req->adapter->ccw_device->dev,
88 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
89 (unsigned long long)unit->fcp_lun,
90 (unsigned long long)unit->port->wwpn);
91 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
92 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
93 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
94 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
95 }
96
97 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
98 {
99 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
100 "operational because of an unsupported FC class\n");
101 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
102 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
103 }
104
105 /**
106 * zfcp_fsf_req_free - free memory used by fsf request
107 * @fsf_req: pointer to struct zfcp_fsf_req
108 */
109 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
110 {
111 if (likely(req->pool)) {
112 if (likely(req->qtcb))
113 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
114 mempool_free(req, req->pool);
115 return;
116 }
117
118 if (likely(req->qtcb))
119 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
120 kfree(req);
121 }
122
123 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
124 {
125 struct fsf_status_read_buffer *sr_buf = req->data;
126 struct zfcp_adapter *adapter = req->adapter;
127 struct zfcp_port *port;
128 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
129 unsigned long flags;
130
131 read_lock_irqsave(&zfcp_data.config_lock, flags);
132 list_for_each_entry(port, &adapter->port_list_head, list)
133 if (port->d_id == d_id) {
134 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
135 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
136 return;
137 }
138 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
139 }
140
141 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
142 struct fsf_link_down_info *link_down)
143 {
144 struct zfcp_adapter *adapter = req->adapter;
145 unsigned long flags;
146
147 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
148 return;
149
150 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
151
152 read_lock_irqsave(&zfcp_data.config_lock, flags);
153 zfcp_scsi_schedule_rports_block(adapter);
154 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
155
156 if (!link_down)
157 goto out;
158
159 switch (link_down->error_code) {
160 case FSF_PSQ_LINK_NO_LIGHT:
161 dev_warn(&req->adapter->ccw_device->dev,
162 "There is no light signal from the local "
163 "fibre channel cable\n");
164 break;
165 case FSF_PSQ_LINK_WRAP_PLUG:
166 dev_warn(&req->adapter->ccw_device->dev,
167 "There is a wrap plug instead of a fibre "
168 "channel cable\n");
169 break;
170 case FSF_PSQ_LINK_NO_FCP:
171 dev_warn(&req->adapter->ccw_device->dev,
172 "The adjacent fibre channel node does not "
173 "support FCP\n");
174 break;
175 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
176 dev_warn(&req->adapter->ccw_device->dev,
177 "The FCP device is suspended because of a "
178 "firmware update\n");
179 break;
180 case FSF_PSQ_LINK_INVALID_WWPN:
181 dev_warn(&req->adapter->ccw_device->dev,
182 "The FCP device detected a WWPN that is "
183 "duplicate or not valid\n");
184 break;
185 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
186 dev_warn(&req->adapter->ccw_device->dev,
187 "The fibre channel fabric does not support NPIV\n");
188 break;
189 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
190 dev_warn(&req->adapter->ccw_device->dev,
191 "The FCP adapter cannot support more NPIV ports\n");
192 break;
193 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
194 dev_warn(&req->adapter->ccw_device->dev,
195 "The adjacent switch cannot support "
196 "more NPIV ports\n");
197 break;
198 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
199 dev_warn(&req->adapter->ccw_device->dev,
200 "The FCP adapter could not log in to the "
201 "fibre channel fabric\n");
202 break;
203 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
204 dev_warn(&req->adapter->ccw_device->dev,
205 "The WWPN assignment file on the FCP adapter "
206 "has been damaged\n");
207 break;
208 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
209 dev_warn(&req->adapter->ccw_device->dev,
210 "The mode table on the FCP adapter "
211 "has been damaged\n");
212 break;
213 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
214 dev_warn(&req->adapter->ccw_device->dev,
215 "All NPIV ports on the FCP adapter have "
216 "been assigned\n");
217 break;
218 default:
219 dev_warn(&req->adapter->ccw_device->dev,
220 "The link between the FCP adapter and "
221 "the FC fabric is down\n");
222 }
223 out:
224 zfcp_erp_adapter_failed(adapter, id, req);
225 }
226
227 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
228 {
229 struct fsf_status_read_buffer *sr_buf = req->data;
230 struct fsf_link_down_info *ldi =
231 (struct fsf_link_down_info *) &sr_buf->payload;
232
233 switch (sr_buf->status_subtype) {
234 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
235 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
236 break;
237 case FSF_STATUS_READ_SUB_FDISC_FAILED:
238 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
239 break;
240 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
241 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
242 };
243 }
244
245 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
246 {
247 struct zfcp_adapter *adapter = req->adapter;
248 struct fsf_status_read_buffer *sr_buf = req->data;
249
250 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
251 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
252 mempool_free(sr_buf, adapter->pool.status_read_data);
253 zfcp_fsf_req_free(req);
254 return;
255 }
256
257 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
258
259 switch (sr_buf->status_type) {
260 case FSF_STATUS_READ_PORT_CLOSED:
261 zfcp_fsf_status_read_port_closed(req);
262 break;
263 case FSF_STATUS_READ_INCOMING_ELS:
264 zfcp_fc_incoming_els(req);
265 break;
266 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
267 break;
268 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
269 dev_warn(&adapter->ccw_device->dev,
270 "The error threshold for checksum statistics "
271 "has been exceeded\n");
272 zfcp_hba_dbf_event_berr(adapter, req);
273 break;
274 case FSF_STATUS_READ_LINK_DOWN:
275 zfcp_fsf_status_read_link_down(req);
276 break;
277 case FSF_STATUS_READ_LINK_UP:
278 dev_info(&adapter->ccw_device->dev,
279 "The local link has been restored\n");
280 /* All ports should be marked as ready to run again */
281 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
282 ZFCP_STATUS_COMMON_RUNNING,
283 ZFCP_SET);
284 zfcp_erp_adapter_reopen(adapter,
285 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
286 ZFCP_STATUS_COMMON_ERP_FAILED,
287 "fssrh_2", req);
288 break;
289 case FSF_STATUS_READ_NOTIFICATION_LOST:
290 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
291 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
292 req);
293 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
294 schedule_work(&adapter->scan_work);
295 break;
296 case FSF_STATUS_READ_CFDC_UPDATED:
297 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
298 break;
299 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
300 adapter->adapter_features = sr_buf->payload.word[0];
301 break;
302 }
303
304 mempool_free(sr_buf, adapter->pool.status_read_data);
305 zfcp_fsf_req_free(req);
306
307 atomic_inc(&adapter->stat_miss);
308 queue_work(adapter->work_queue, &adapter->stat_work);
309 }
310
311 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
312 {
313 switch (req->qtcb->header.fsf_status_qual.word[0]) {
314 case FSF_SQ_FCP_RSP_AVAILABLE:
315 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
316 case FSF_SQ_NO_RETRY_POSSIBLE:
317 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
318 return;
319 case FSF_SQ_COMMAND_ABORTED:
320 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
321 break;
322 case FSF_SQ_NO_RECOM:
323 dev_err(&req->adapter->ccw_device->dev,
324 "The FCP adapter reported a problem "
325 "that cannot be recovered\n");
326 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
327 break;
328 }
329 /* all non-return stats set FSFREQ_ERROR*/
330 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
331 }
332
333 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
334 {
335 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
336 return;
337
338 switch (req->qtcb->header.fsf_status) {
339 case FSF_UNKNOWN_COMMAND:
340 dev_err(&req->adapter->ccw_device->dev,
341 "The FCP adapter does not recognize the command 0x%x\n",
342 req->qtcb->header.fsf_command);
343 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
344 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
345 break;
346 case FSF_ADAPTER_STATUS_AVAILABLE:
347 zfcp_fsf_fsfstatus_qual_eval(req);
348 break;
349 }
350 }
351
352 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
353 {
354 struct zfcp_adapter *adapter = req->adapter;
355 struct fsf_qtcb *qtcb = req->qtcb;
356 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
357
358 zfcp_hba_dbf_event_fsf_response(req);
359
360 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
361 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
362 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
363 return;
364 }
365
366 switch (qtcb->prefix.prot_status) {
367 case FSF_PROT_GOOD:
368 case FSF_PROT_FSF_STATUS_PRESENTED:
369 return;
370 case FSF_PROT_QTCB_VERSION_ERROR:
371 dev_err(&adapter->ccw_device->dev,
372 "QTCB version 0x%x not supported by FCP adapter "
373 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
374 psq->word[0], psq->word[1]);
375 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
376 break;
377 case FSF_PROT_ERROR_STATE:
378 case FSF_PROT_SEQ_NUMB_ERROR:
379 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
380 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
381 break;
382 case FSF_PROT_UNSUPP_QTCB_TYPE:
383 dev_err(&adapter->ccw_device->dev,
384 "The QTCB type is not supported by the FCP adapter\n");
385 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
386 break;
387 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
388 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
389 &adapter->status);
390 break;
391 case FSF_PROT_DUPLICATE_REQUEST_ID:
392 dev_err(&adapter->ccw_device->dev,
393 "0x%Lx is an ambiguous request identifier\n",
394 (unsigned long long)qtcb->bottom.support.req_handle);
395 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
396 break;
397 case FSF_PROT_LINK_DOWN:
398 zfcp_fsf_link_down_info_eval(req, "fspse_5",
399 &psq->link_down_info);
400 /* FIXME: reopening adapter now? better wait for link up */
401 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
402 break;
403 case FSF_PROT_REEST_QUEUE:
404 /* All ports should be marked as ready to run again */
405 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
406 ZFCP_STATUS_COMMON_RUNNING,
407 ZFCP_SET);
408 zfcp_erp_adapter_reopen(adapter,
409 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
410 ZFCP_STATUS_COMMON_ERP_FAILED,
411 "fspse_8", req);
412 break;
413 default:
414 dev_err(&adapter->ccw_device->dev,
415 "0x%x is not a valid transfer protocol status\n",
416 qtcb->prefix.prot_status);
417 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
418 }
419 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
420 }
421
422 /**
423 * zfcp_fsf_req_complete - process completion of a FSF request
424 * @fsf_req: The FSF request that has been completed.
425 *
426 * When a request has been completed either from the FCP adapter,
427 * or it has been dismissed due to a queue shutdown, this function
428 * is called to process the completion status and trigger further
429 * events related to the FSF request.
430 */
431 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
432 {
433 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
434 zfcp_fsf_status_read_handler(req);
435 return;
436 }
437
438 del_timer(&req->timer);
439 zfcp_fsf_protstatus_eval(req);
440 zfcp_fsf_fsfstatus_eval(req);
441 req->handler(req);
442
443 if (req->erp_action)
444 zfcp_erp_notify(req->erp_action, 0);
445
446 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
447 zfcp_fsf_req_free(req);
448 else
449 complete(&req->completion);
450 }
451
452 /**
453 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
454 * @adapter: pointer to struct zfcp_adapter
455 *
456 * Never ever call this without shutting down the adapter first.
457 * Otherwise the adapter would continue using and corrupting s390 storage.
458 * Included BUG_ON() call to ensure this is done.
459 * ERP is supposed to be the only user of this function.
460 */
461 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
462 {
463 struct zfcp_fsf_req *req, *tmp;
464 unsigned long flags;
465 LIST_HEAD(remove_queue);
466 unsigned int i;
467
468 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
469 spin_lock_irqsave(&adapter->req_list_lock, flags);
470 for (i = 0; i < REQUEST_LIST_SIZE; i++)
471 list_splice_init(&adapter->req_list[i], &remove_queue);
472 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
473
474 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
475 list_del(&req->list);
476 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
477 zfcp_fsf_req_complete(req);
478 }
479 }
480
481 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
482 {
483 struct fsf_qtcb_bottom_config *bottom;
484 struct zfcp_adapter *adapter = req->adapter;
485 struct Scsi_Host *shost = adapter->scsi_host;
486
487 bottom = &req->qtcb->bottom.config;
488
489 if (req->data)
490 memcpy(req->data, bottom, sizeof(*bottom));
491
492 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
493 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
494 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
495 fc_host_speed(shost) = bottom->fc_link_speed;
496 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
497
498 adapter->hydra_version = bottom->adapter_type;
499 adapter->timer_ticks = bottom->timer_interval;
500
501 if (fc_host_permanent_port_name(shost) == -1)
502 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
503
504 switch (bottom->fc_topology) {
505 case FSF_TOPO_P2P:
506 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
507 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
508 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
509 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
510 break;
511 case FSF_TOPO_FABRIC:
512 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
513 break;
514 case FSF_TOPO_AL:
515 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
516 /* fall through */
517 default:
518 dev_err(&adapter->ccw_device->dev,
519 "Unknown or unsupported arbitrated loop "
520 "fibre channel topology detected\n");
521 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
522 return -EIO;
523 }
524
525 return 0;
526 }
527
528 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
529 {
530 struct zfcp_adapter *adapter = req->adapter;
531 struct fsf_qtcb *qtcb = req->qtcb;
532 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
533 struct Scsi_Host *shost = adapter->scsi_host;
534
535 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
536 return;
537
538 adapter->fsf_lic_version = bottom->lic_version;
539 adapter->adapter_features = bottom->adapter_features;
540 adapter->connection_features = bottom->connection_features;
541 adapter->peer_wwpn = 0;
542 adapter->peer_wwnn = 0;
543 adapter->peer_d_id = 0;
544
545 switch (qtcb->header.fsf_status) {
546 case FSF_GOOD:
547 if (zfcp_fsf_exchange_config_evaluate(req))
548 return;
549
550 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
551 dev_err(&adapter->ccw_device->dev,
552 "FCP adapter maximum QTCB size (%d bytes) "
553 "is too small\n",
554 bottom->max_qtcb_size);
555 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
556 return;
557 }
558 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
559 &adapter->status);
560 break;
561 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
562 fc_host_node_name(shost) = 0;
563 fc_host_port_name(shost) = 0;
564 fc_host_port_id(shost) = 0;
565 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
566 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
567 adapter->hydra_version = 0;
568
569 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
570 &adapter->status);
571
572 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
573 &qtcb->header.fsf_status_qual.link_down_info);
574 break;
575 default:
576 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
577 return;
578 }
579
580 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
581 adapter->hardware_version = bottom->hardware_version;
582 memcpy(fc_host_serial_number(shost), bottom->serial_number,
583 min(FC_SERIAL_NUMBER_SIZE, 17));
584 EBCASC(fc_host_serial_number(shost),
585 min(FC_SERIAL_NUMBER_SIZE, 17));
586 }
587
588 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
589 dev_err(&adapter->ccw_device->dev,
590 "The FCP adapter only supports newer "
591 "control block versions\n");
592 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
593 return;
594 }
595 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
596 dev_err(&adapter->ccw_device->dev,
597 "The FCP adapter only supports older "
598 "control block versions\n");
599 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
600 }
601 }
602
603 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
604 {
605 struct zfcp_adapter *adapter = req->adapter;
606 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
607 struct Scsi_Host *shost = adapter->scsi_host;
608
609 if (req->data)
610 memcpy(req->data, bottom, sizeof(*bottom));
611
612 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
613 fc_host_permanent_port_name(shost) = bottom->wwpn;
614 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
615 } else
616 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
617 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
618 fc_host_supported_speeds(shost) = bottom->supported_speed;
619 }
620
621 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
622 {
623 struct fsf_qtcb *qtcb = req->qtcb;
624
625 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
626 return;
627
628 switch (qtcb->header.fsf_status) {
629 case FSF_GOOD:
630 zfcp_fsf_exchange_port_evaluate(req);
631 break;
632 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
633 zfcp_fsf_exchange_port_evaluate(req);
634 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
635 &qtcb->header.fsf_status_qual.link_down_info);
636 break;
637 }
638 }
639
640 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
641 {
642 struct zfcp_qdio_queue *req_q = &adapter->req_q;
643
644 spin_lock_bh(&adapter->req_q_lock);
645 if (atomic_read(&req_q->count))
646 return 1;
647 spin_unlock_bh(&adapter->req_q_lock);
648 return 0;
649 }
650
651 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
652 {
653 long ret;
654
655 spin_unlock_bh(&adapter->req_q_lock);
656 ret = wait_event_interruptible_timeout(adapter->request_wq,
657 zfcp_fsf_sbal_check(adapter), 5 * HZ);
658 if (ret > 0)
659 return 0;
660 if (!ret) {
661 atomic_inc(&adapter->qdio_outb_full);
662 /* assume hanging outbound queue, try queue recovery */
663 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
664 }
665
666 spin_lock_bh(&adapter->req_q_lock);
667 return -EIO;
668 }
669
670 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
671 {
672 struct zfcp_fsf_req *req;
673
674 if (likely(pool))
675 req = mempool_alloc(pool, GFP_ATOMIC);
676 else
677 req = kmalloc(sizeof(*req), GFP_ATOMIC);
678
679 if (unlikely(!req))
680 return NULL;
681
682 memset(req, 0, sizeof(*req));
683 req->pool = pool;
684 return req;
685 }
686
687 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
688 {
689 struct fsf_qtcb *qtcb;
690
691 if (likely(pool))
692 qtcb = mempool_alloc(pool, GFP_ATOMIC);
693 else
694 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
695
696 if (unlikely(!qtcb))
697 return NULL;
698
699 memset(qtcb, 0, sizeof(*qtcb));
700 return qtcb;
701 }
702
703 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
704 u32 fsf_cmd, mempool_t *pool)
705 {
706 struct qdio_buffer_element *sbale;
707 struct zfcp_qdio_queue *req_q = &adapter->req_q;
708 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
709
710 if (unlikely(!req))
711 return ERR_PTR(-ENOMEM);
712
713 if (adapter->req_no == 0)
714 adapter->req_no++;
715
716 INIT_LIST_HEAD(&req->list);
717 init_timer(&req->timer);
718 init_completion(&req->completion);
719
720 req->adapter = adapter;
721 req->fsf_command = fsf_cmd;
722 req->req_id = adapter->req_no;
723 req->sbal_number = 1;
724 req->sbal_first = req_q->first;
725 req->sbal_last = req_q->first;
726 req->sbale_curr = 1;
727
728 sbale = zfcp_qdio_sbale_req(req);
729 sbale[0].addr = (void *) req->req_id;
730 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
731
732 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
733 if (likely(pool))
734 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
735 else
736 req->qtcb = zfcp_qtcb_alloc(NULL);
737
738 if (unlikely(!req->qtcb)) {
739 zfcp_fsf_req_free(req);
740 return ERR_PTR(-ENOMEM);
741 }
742
743 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
744 req->qtcb->prefix.req_id = req->req_id;
745 req->qtcb->prefix.ulp_info = 26;
746 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
747 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
748 req->qtcb->header.req_handle = req->req_id;
749 req->qtcb->header.fsf_command = req->fsf_command;
750 req->seq_no = adapter->fsf_req_seq_no;
751 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
752 sbale[1].addr = (void *) req->qtcb;
753 sbale[1].length = sizeof(struct fsf_qtcb);
754 }
755
756 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
757 zfcp_fsf_req_free(req);
758 return ERR_PTR(-EIO);
759 }
760
761 return req;
762 }
763
764 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
765 {
766 struct zfcp_adapter *adapter = req->adapter;
767 unsigned long flags;
768 int idx;
769 int with_qtcb = (req->qtcb != NULL);
770
771 /* put allocated FSF request into hash table */
772 spin_lock_irqsave(&adapter->req_list_lock, flags);
773 idx = zfcp_reqlist_hash(req->req_id);
774 list_add_tail(&req->list, &adapter->req_list[idx]);
775 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
776
777 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
778 req->issued = get_clock();
779 if (zfcp_qdio_send(req)) {
780 del_timer(&req->timer);
781 spin_lock_irqsave(&adapter->req_list_lock, flags);
782 /* lookup request again, list might have changed */
783 if (zfcp_reqlist_find_safe(adapter, req))
784 zfcp_reqlist_remove(adapter, req);
785 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
786 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
787 return -EIO;
788 }
789
790 /* Don't increase for unsolicited status */
791 if (with_qtcb)
792 adapter->fsf_req_seq_no++;
793 adapter->req_no++;
794
795 return 0;
796 }
797
798 /**
799 * zfcp_fsf_status_read - send status read request
800 * @adapter: pointer to struct zfcp_adapter
801 * @req_flags: request flags
802 * Returns: 0 on success, ERROR otherwise
803 */
804 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
805 {
806 struct zfcp_fsf_req *req;
807 struct fsf_status_read_buffer *sr_buf;
808 struct qdio_buffer_element *sbale;
809 int retval = -EIO;
810
811 spin_lock_bh(&adapter->req_q_lock);
812 if (zfcp_fsf_req_sbal_get(adapter))
813 goto out;
814
815 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
816 adapter->pool.status_read_req);
817 if (IS_ERR(req)) {
818 retval = PTR_ERR(req);
819 goto out;
820 }
821
822 sbale = zfcp_qdio_sbale_req(req);
823 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
824 req->sbale_curr = 2;
825
826 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
827 if (!sr_buf) {
828 retval = -ENOMEM;
829 goto failed_buf;
830 }
831 memset(sr_buf, 0, sizeof(*sr_buf));
832 req->data = sr_buf;
833 sbale = zfcp_qdio_sbale_curr(req);
834 sbale->addr = (void *) sr_buf;
835 sbale->length = sizeof(*sr_buf);
836
837 retval = zfcp_fsf_req_send(req);
838 if (retval)
839 goto failed_req_send;
840
841 goto out;
842
843 failed_req_send:
844 mempool_free(sr_buf, adapter->pool.status_read_data);
845 failed_buf:
846 zfcp_fsf_req_free(req);
847 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
848 out:
849 spin_unlock_bh(&adapter->req_q_lock);
850 return retval;
851 }
852
853 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
854 {
855 struct zfcp_unit *unit = req->data;
856 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
857
858 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
859 return;
860
861 switch (req->qtcb->header.fsf_status) {
862 case FSF_PORT_HANDLE_NOT_VALID:
863 if (fsq->word[0] == fsq->word[1]) {
864 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
865 "fsafch1", req);
866 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
867 }
868 break;
869 case FSF_LUN_HANDLE_NOT_VALID:
870 if (fsq->word[0] == fsq->word[1]) {
871 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
872 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
873 }
874 break;
875 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
876 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
877 break;
878 case FSF_PORT_BOXED:
879 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
880 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
881 ZFCP_STATUS_FSFREQ_RETRY;
882 break;
883 case FSF_LUN_BOXED:
884 zfcp_erp_unit_boxed(unit, "fsafch4", req);
885 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
886 ZFCP_STATUS_FSFREQ_RETRY;
887 break;
888 case FSF_ADAPTER_STATUS_AVAILABLE:
889 switch (fsq->word[0]) {
890 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
891 zfcp_test_link(unit->port);
892 /* fall through */
893 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
894 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
895 break;
896 }
897 break;
898 case FSF_GOOD:
899 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
900 break;
901 }
902 }
903
904 /**
905 * zfcp_fsf_abort_fcp_command - abort running SCSI command
906 * @old_req_id: unsigned long
907 * @unit: pointer to struct zfcp_unit
908 * Returns: pointer to struct zfcp_fsf_req
909 */
910
911 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
912 struct zfcp_unit *unit)
913 {
914 struct qdio_buffer_element *sbale;
915 struct zfcp_fsf_req *req = NULL;
916 struct zfcp_adapter *adapter = unit->port->adapter;
917
918 spin_lock_bh(&adapter->req_q_lock);
919 if (zfcp_fsf_req_sbal_get(adapter))
920 goto out;
921 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
922 adapter->pool.scsi_abort);
923 if (IS_ERR(req)) {
924 req = NULL;
925 goto out;
926 }
927
928 if (unlikely(!(atomic_read(&unit->status) &
929 ZFCP_STATUS_COMMON_UNBLOCKED)))
930 goto out_error_free;
931
932 sbale = zfcp_qdio_sbale_req(req);
933 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
934 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
935
936 req->data = unit;
937 req->handler = zfcp_fsf_abort_fcp_command_handler;
938 req->qtcb->header.lun_handle = unit->handle;
939 req->qtcb->header.port_handle = unit->port->handle;
940 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
941
942 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
943 if (!zfcp_fsf_req_send(req))
944 goto out;
945
946 out_error_free:
947 zfcp_fsf_req_free(req);
948 req = NULL;
949 out:
950 spin_unlock_bh(&adapter->req_q_lock);
951 return req;
952 }
953
954 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
955 {
956 struct zfcp_adapter *adapter = req->adapter;
957 struct zfcp_send_ct *send_ct = req->data;
958 struct fsf_qtcb_header *header = &req->qtcb->header;
959
960 send_ct->status = -EINVAL;
961
962 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
963 goto skip_fsfstatus;
964
965 switch (header->fsf_status) {
966 case FSF_GOOD:
967 zfcp_san_dbf_event_ct_response(req);
968 send_ct->status = 0;
969 break;
970 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
971 zfcp_fsf_class_not_supp(req);
972 break;
973 case FSF_ADAPTER_STATUS_AVAILABLE:
974 switch (header->fsf_status_qual.word[0]){
975 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
976 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
977 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
978 break;
979 }
980 break;
981 case FSF_ACCESS_DENIED:
982 break;
983 case FSF_PORT_BOXED:
984 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
985 ZFCP_STATUS_FSFREQ_RETRY;
986 break;
987 case FSF_PORT_HANDLE_NOT_VALID:
988 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
989 /* fall through */
990 case FSF_GENERIC_COMMAND_REJECTED:
991 case FSF_PAYLOAD_SIZE_MISMATCH:
992 case FSF_REQUEST_SIZE_TOO_LARGE:
993 case FSF_RESPONSE_SIZE_TOO_LARGE:
994 case FSF_SBAL_MISMATCH:
995 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
996 break;
997 }
998
999 skip_fsfstatus:
1000 if (send_ct->handler)
1001 send_ct->handler(send_ct->handler_data);
1002 }
1003
1004 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1005 struct scatterlist *sg_req,
1006 struct scatterlist *sg_resp)
1007 {
1008 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1009 sbale[2].addr = sg_virt(sg_req);
1010 sbale[2].length = sg_req->length;
1011 sbale[3].addr = sg_virt(sg_resp);
1012 sbale[3].length = sg_resp->length;
1013 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1014 }
1015
1016 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1017 {
1018 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1019 }
1020
1021 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1022 struct scatterlist *sg_req,
1023 struct scatterlist *sg_resp,
1024 int max_sbals)
1025 {
1026 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1027 u32 feat = req->adapter->adapter_features;
1028 int bytes;
1029
1030 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1031 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1032 return -EOPNOTSUPP;
1033
1034 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1035 return 0;
1036 }
1037
1038 /* use single, unchained SBAL if it can hold the request */
1039 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1040 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041 return 0;
1042 }
1043
1044 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1045 sg_req, max_sbals);
1046 if (bytes <= 0)
1047 return -EIO;
1048 req->qtcb->bottom.support.req_buf_length = bytes;
1049 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1050
1051 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1052 sg_resp, max_sbals);
1053 if (bytes <= 0)
1054 return -EIO;
1055 req->qtcb->bottom.support.resp_buf_length = bytes;
1056
1057 return 0;
1058 }
1059
1060 /**
1061 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1062 * @ct: pointer to struct zfcp_send_ct with data for request
1063 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1064 * @erp_action: if non-null the Generic Service request sent within ERP
1065 */
1066 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1067 struct zfcp_erp_action *erp_action)
1068 {
1069 struct zfcp_wka_port *wka_port = ct->wka_port;
1070 struct zfcp_adapter *adapter = wka_port->adapter;
1071 struct zfcp_fsf_req *req;
1072 int ret = -EIO;
1073
1074 spin_lock_bh(&adapter->req_q_lock);
1075 if (zfcp_fsf_req_sbal_get(adapter))
1076 goto out;
1077
1078 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, pool);
1079
1080 if (IS_ERR(req)) {
1081 ret = PTR_ERR(req);
1082 goto out;
1083 }
1084
1085 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1086 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1087 FSF_MAX_SBALS_PER_REQ);
1088 if (ret)
1089 goto failed_send;
1090
1091 req->handler = zfcp_fsf_send_ct_handler;
1092 req->qtcb->header.port_handle = wka_port->handle;
1093 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1094 req->qtcb->bottom.support.timeout = ct->timeout;
1095 req->data = ct;
1096
1097 zfcp_san_dbf_event_ct_request(req);
1098
1099 if (erp_action) {
1100 erp_action->fsf_req = req;
1101 req->erp_action = erp_action;
1102 zfcp_fsf_start_erp_timer(req);
1103 } else
1104 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1105
1106 ret = zfcp_fsf_req_send(req);
1107 if (ret)
1108 goto failed_send;
1109
1110 goto out;
1111
1112 failed_send:
1113 zfcp_fsf_req_free(req);
1114 if (erp_action)
1115 erp_action->fsf_req = NULL;
1116 out:
1117 spin_unlock_bh(&adapter->req_q_lock);
1118 return ret;
1119 }
1120
1121 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1122 {
1123 struct zfcp_send_els *send_els = req->data;
1124 struct zfcp_port *port = send_els->port;
1125 struct fsf_qtcb_header *header = &req->qtcb->header;
1126
1127 send_els->status = -EINVAL;
1128
1129 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1130 goto skip_fsfstatus;
1131
1132 switch (header->fsf_status) {
1133 case FSF_GOOD:
1134 zfcp_san_dbf_event_els_response(req);
1135 send_els->status = 0;
1136 break;
1137 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1138 zfcp_fsf_class_not_supp(req);
1139 break;
1140 case FSF_ADAPTER_STATUS_AVAILABLE:
1141 switch (header->fsf_status_qual.word[0]){
1142 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1143 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1144 zfcp_test_link(port);
1145 /*fall through */
1146 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1147 case FSF_SQ_RETRY_IF_POSSIBLE:
1148 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1149 break;
1150 }
1151 break;
1152 case FSF_ELS_COMMAND_REJECTED:
1153 case FSF_PAYLOAD_SIZE_MISMATCH:
1154 case FSF_REQUEST_SIZE_TOO_LARGE:
1155 case FSF_RESPONSE_SIZE_TOO_LARGE:
1156 break;
1157 case FSF_ACCESS_DENIED:
1158 if (port)
1159 zfcp_fsf_access_denied_port(req, port);
1160 break;
1161 case FSF_SBAL_MISMATCH:
1162 /* should never occure, avoided in zfcp_fsf_send_els */
1163 /* fall through */
1164 default:
1165 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1166 break;
1167 }
1168 skip_fsfstatus:
1169 if (send_els->handler)
1170 send_els->handler(send_els->handler_data);
1171 }
1172
1173 /**
1174 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1175 * @els: pointer to struct zfcp_send_els with data for the command
1176 */
1177 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1178 {
1179 struct zfcp_fsf_req *req;
1180 struct zfcp_adapter *adapter = els->adapter;
1181 struct fsf_qtcb_bottom_support *bottom;
1182 int ret = -EIO;
1183
1184 spin_lock_bh(&adapter->req_q_lock);
1185 if (zfcp_fsf_req_sbal_get(adapter))
1186 goto out;
1187
1188 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, NULL);
1189
1190 if (IS_ERR(req)) {
1191 ret = PTR_ERR(req);
1192 goto out;
1193 }
1194
1195 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1196 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1197
1198 if (ret)
1199 goto failed_send;
1200
1201 bottom = &req->qtcb->bottom.support;
1202 req->handler = zfcp_fsf_send_els_handler;
1203 bottom->d_id = els->d_id;
1204 bottom->service_class = FSF_CLASS_3;
1205 bottom->timeout = 2 * R_A_TOV;
1206 req->data = els;
1207
1208 zfcp_san_dbf_event_els_request(req);
1209
1210 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1211 ret = zfcp_fsf_req_send(req);
1212 if (ret)
1213 goto failed_send;
1214
1215 goto out;
1216
1217 failed_send:
1218 zfcp_fsf_req_free(req);
1219 out:
1220 spin_unlock_bh(&adapter->req_q_lock);
1221 return ret;
1222 }
1223
1224 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1225 {
1226 struct qdio_buffer_element *sbale;
1227 struct zfcp_fsf_req *req;
1228 struct zfcp_adapter *adapter = erp_action->adapter;
1229 int retval = -EIO;
1230
1231 spin_lock_bh(&adapter->req_q_lock);
1232 if (zfcp_fsf_req_sbal_get(adapter))
1233 goto out;
1234
1235 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1236 adapter->pool.erp_req);
1237
1238 if (IS_ERR(req)) {
1239 retval = PTR_ERR(req);
1240 goto out;
1241 }
1242
1243 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1244 sbale = zfcp_qdio_sbale_req(req);
1245 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1246 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1247
1248 req->qtcb->bottom.config.feature_selection =
1249 FSF_FEATURE_CFDC |
1250 FSF_FEATURE_LUN_SHARING |
1251 FSF_FEATURE_NOTIFICATION_LOST |
1252 FSF_FEATURE_UPDATE_ALERT;
1253 req->erp_action = erp_action;
1254 req->handler = zfcp_fsf_exchange_config_data_handler;
1255 erp_action->fsf_req = req;
1256
1257 zfcp_fsf_start_erp_timer(req);
1258 retval = zfcp_fsf_req_send(req);
1259 if (retval) {
1260 zfcp_fsf_req_free(req);
1261 erp_action->fsf_req = NULL;
1262 }
1263 out:
1264 spin_unlock_bh(&adapter->req_q_lock);
1265 return retval;
1266 }
1267
1268 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1269 struct fsf_qtcb_bottom_config *data)
1270 {
1271 struct qdio_buffer_element *sbale;
1272 struct zfcp_fsf_req *req = NULL;
1273 int retval = -EIO;
1274
1275 spin_lock_bh(&adapter->req_q_lock);
1276 if (zfcp_fsf_req_sbal_get(adapter))
1277 goto out_unlock;
1278
1279 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1280
1281 if (IS_ERR(req)) {
1282 retval = PTR_ERR(req);
1283 goto out_unlock;
1284 }
1285
1286 sbale = zfcp_qdio_sbale_req(req);
1287 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1288 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1289 req->handler = zfcp_fsf_exchange_config_data_handler;
1290
1291 req->qtcb->bottom.config.feature_selection =
1292 FSF_FEATURE_CFDC |
1293 FSF_FEATURE_LUN_SHARING |
1294 FSF_FEATURE_NOTIFICATION_LOST |
1295 FSF_FEATURE_UPDATE_ALERT;
1296
1297 if (data)
1298 req->data = data;
1299
1300 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1301 retval = zfcp_fsf_req_send(req);
1302 spin_unlock_bh(&adapter->req_q_lock);
1303 if (!retval)
1304 wait_for_completion(&req->completion);
1305
1306 zfcp_fsf_req_free(req);
1307 return retval;
1308
1309 out_unlock:
1310 spin_unlock_bh(&adapter->req_q_lock);
1311 return retval;
1312 }
1313
1314 /**
1315 * zfcp_fsf_exchange_port_data - request information about local port
1316 * @erp_action: ERP action for the adapter for which port data is requested
1317 * Returns: 0 on success, error otherwise
1318 */
1319 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1320 {
1321 struct qdio_buffer_element *sbale;
1322 struct zfcp_fsf_req *req;
1323 struct zfcp_adapter *adapter = erp_action->adapter;
1324 int retval = -EIO;
1325
1326 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1327 return -EOPNOTSUPP;
1328
1329 spin_lock_bh(&adapter->req_q_lock);
1330 if (zfcp_fsf_req_sbal_get(adapter))
1331 goto out;
1332
1333 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1334 adapter->pool.erp_req);
1335
1336 if (IS_ERR(req)) {
1337 retval = PTR_ERR(req);
1338 goto out;
1339 }
1340
1341 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1342 sbale = zfcp_qdio_sbale_req(req);
1343 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1344 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1345
1346 req->handler = zfcp_fsf_exchange_port_data_handler;
1347 req->erp_action = erp_action;
1348 erp_action->fsf_req = req;
1349
1350 zfcp_fsf_start_erp_timer(req);
1351 retval = zfcp_fsf_req_send(req);
1352 if (retval) {
1353 zfcp_fsf_req_free(req);
1354 erp_action->fsf_req = NULL;
1355 }
1356 out:
1357 spin_unlock_bh(&adapter->req_q_lock);
1358 return retval;
1359 }
1360
1361 /**
1362 * zfcp_fsf_exchange_port_data_sync - request information about local port
1363 * @adapter: pointer to struct zfcp_adapter
1364 * @data: pointer to struct fsf_qtcb_bottom_port
1365 * Returns: 0 on success, error otherwise
1366 */
1367 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1368 struct fsf_qtcb_bottom_port *data)
1369 {
1370 struct qdio_buffer_element *sbale;
1371 struct zfcp_fsf_req *req = NULL;
1372 int retval = -EIO;
1373
1374 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1375 return -EOPNOTSUPP;
1376
1377 spin_lock_bh(&adapter->req_q_lock);
1378 if (zfcp_fsf_req_sbal_get(adapter))
1379 goto out_unlock;
1380
1381 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1382
1383 if (IS_ERR(req)) {
1384 retval = PTR_ERR(req);
1385 goto out_unlock;
1386 }
1387
1388 if (data)
1389 req->data = data;
1390
1391 sbale = zfcp_qdio_sbale_req(req);
1392 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1393 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1394
1395 req->handler = zfcp_fsf_exchange_port_data_handler;
1396 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1397 retval = zfcp_fsf_req_send(req);
1398 spin_unlock_bh(&adapter->req_q_lock);
1399
1400 if (!retval)
1401 wait_for_completion(&req->completion);
1402
1403 zfcp_fsf_req_free(req);
1404
1405 return retval;
1406
1407 out_unlock:
1408 spin_unlock_bh(&adapter->req_q_lock);
1409 return retval;
1410 }
1411
1412 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1413 {
1414 struct zfcp_port *port = req->data;
1415 struct fsf_qtcb_header *header = &req->qtcb->header;
1416 struct fsf_plogi *plogi;
1417
1418 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1419 goto out;
1420
1421 switch (header->fsf_status) {
1422 case FSF_PORT_ALREADY_OPEN:
1423 break;
1424 case FSF_ACCESS_DENIED:
1425 zfcp_fsf_access_denied_port(req, port);
1426 break;
1427 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1428 dev_warn(&req->adapter->ccw_device->dev,
1429 "Not enough FCP adapter resources to open "
1430 "remote port 0x%016Lx\n",
1431 (unsigned long long)port->wwpn);
1432 zfcp_erp_port_failed(port, "fsoph_1", req);
1433 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1434 break;
1435 case FSF_ADAPTER_STATUS_AVAILABLE:
1436 switch (header->fsf_status_qual.word[0]) {
1437 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1438 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1439 case FSF_SQ_NO_RETRY_POSSIBLE:
1440 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1441 break;
1442 }
1443 break;
1444 case FSF_GOOD:
1445 port->handle = header->port_handle;
1446 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1447 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1448 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1449 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1450 &port->status);
1451 /* check whether D_ID has changed during open */
1452 /*
1453 * FIXME: This check is not airtight, as the FCP channel does
1454 * not monitor closures of target port connections caused on
1455 * the remote side. Thus, they might miss out on invalidating
1456 * locally cached WWPNs (and other N_Port parameters) of gone
1457 * target ports. So, our heroic attempt to make things safe
1458 * could be undermined by 'open port' response data tagged with
1459 * obsolete WWPNs. Another reason to monitor potential
1460 * connection closures ourself at least (by interpreting
1461 * incoming ELS' and unsolicited status). It just crosses my
1462 * mind that one should be able to cross-check by means of
1463 * another GID_PN straight after a port has been opened.
1464 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1465 */
1466 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1467 if (req->qtcb->bottom.support.els1_length >=
1468 FSF_PLOGI_MIN_LEN) {
1469 if (plogi->serv_param.wwpn != port->wwpn)
1470 port->d_id = 0;
1471 else {
1472 port->wwnn = plogi->serv_param.wwnn;
1473 zfcp_fc_plogi_evaluate(port, plogi);
1474 }
1475 }
1476 break;
1477 case FSF_UNKNOWN_OP_SUBTYPE:
1478 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1479 break;
1480 }
1481
1482 out:
1483 zfcp_port_put(port);
1484 }
1485
1486 /**
1487 * zfcp_fsf_open_port - create and send open port request
1488 * @erp_action: pointer to struct zfcp_erp_action
1489 * Returns: 0 on success, error otherwise
1490 */
1491 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1492 {
1493 struct qdio_buffer_element *sbale;
1494 struct zfcp_adapter *adapter = erp_action->adapter;
1495 struct zfcp_fsf_req *req;
1496 struct zfcp_port *port = erp_action->port;
1497 int retval = -EIO;
1498
1499 spin_lock_bh(&adapter->req_q_lock);
1500 if (zfcp_fsf_req_sbal_get(adapter))
1501 goto out;
1502
1503 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1504 adapter->pool.erp_req);
1505
1506 if (IS_ERR(req)) {
1507 retval = PTR_ERR(req);
1508 goto out;
1509 }
1510
1511 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1512 sbale = zfcp_qdio_sbale_req(req);
1513 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1514 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1515
1516 req->handler = zfcp_fsf_open_port_handler;
1517 req->qtcb->bottom.support.d_id = port->d_id;
1518 req->data = port;
1519 req->erp_action = erp_action;
1520 erp_action->fsf_req = req;
1521 zfcp_port_get(port);
1522
1523 zfcp_fsf_start_erp_timer(req);
1524 retval = zfcp_fsf_req_send(req);
1525 if (retval) {
1526 zfcp_fsf_req_free(req);
1527 erp_action->fsf_req = NULL;
1528 zfcp_port_put(port);
1529 }
1530 out:
1531 spin_unlock_bh(&adapter->req_q_lock);
1532 return retval;
1533 }
1534
1535 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1536 {
1537 struct zfcp_port *port = req->data;
1538
1539 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1540 return;
1541
1542 switch (req->qtcb->header.fsf_status) {
1543 case FSF_PORT_HANDLE_NOT_VALID:
1544 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1545 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1546 break;
1547 case FSF_ADAPTER_STATUS_AVAILABLE:
1548 break;
1549 case FSF_GOOD:
1550 zfcp_erp_modify_port_status(port, "fscph_2", req,
1551 ZFCP_STATUS_COMMON_OPEN,
1552 ZFCP_CLEAR);
1553 break;
1554 }
1555 }
1556
1557 /**
1558 * zfcp_fsf_close_port - create and send close port request
1559 * @erp_action: pointer to struct zfcp_erp_action
1560 * Returns: 0 on success, error otherwise
1561 */
1562 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1563 {
1564 struct qdio_buffer_element *sbale;
1565 struct zfcp_adapter *adapter = erp_action->adapter;
1566 struct zfcp_fsf_req *req;
1567 int retval = -EIO;
1568
1569 spin_lock_bh(&adapter->req_q_lock);
1570 if (zfcp_fsf_req_sbal_get(adapter))
1571 goto out;
1572
1573 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1574 adapter->pool.erp_req);
1575
1576 if (IS_ERR(req)) {
1577 retval = PTR_ERR(req);
1578 goto out;
1579 }
1580
1581 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1582 sbale = zfcp_qdio_sbale_req(req);
1583 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1584 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1585
1586 req->handler = zfcp_fsf_close_port_handler;
1587 req->data = erp_action->port;
1588 req->erp_action = erp_action;
1589 req->qtcb->header.port_handle = erp_action->port->handle;
1590 erp_action->fsf_req = req;
1591
1592 zfcp_fsf_start_erp_timer(req);
1593 retval = zfcp_fsf_req_send(req);
1594 if (retval) {
1595 zfcp_fsf_req_free(req);
1596 erp_action->fsf_req = NULL;
1597 }
1598 out:
1599 spin_unlock_bh(&adapter->req_q_lock);
1600 return retval;
1601 }
1602
1603 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1604 {
1605 struct zfcp_wka_port *wka_port = req->data;
1606 struct fsf_qtcb_header *header = &req->qtcb->header;
1607
1608 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1609 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1610 goto out;
1611 }
1612
1613 switch (header->fsf_status) {
1614 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1615 dev_warn(&req->adapter->ccw_device->dev,
1616 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1617 /* fall through */
1618 case FSF_ADAPTER_STATUS_AVAILABLE:
1619 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1620 /* fall through */
1621 case FSF_ACCESS_DENIED:
1622 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1623 break;
1624 case FSF_GOOD:
1625 wka_port->handle = header->port_handle;
1626 /* fall through */
1627 case FSF_PORT_ALREADY_OPEN:
1628 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1629 }
1630 out:
1631 wake_up(&wka_port->completion_wq);
1632 }
1633
1634 /**
1635 * zfcp_fsf_open_wka_port - create and send open wka-port request
1636 * @wka_port: pointer to struct zfcp_wka_port
1637 * Returns: 0 on success, error otherwise
1638 */
1639 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1640 {
1641 struct qdio_buffer_element *sbale;
1642 struct zfcp_adapter *adapter = wka_port->adapter;
1643 struct zfcp_fsf_req *req;
1644 int retval = -EIO;
1645
1646 spin_lock_bh(&adapter->req_q_lock);
1647 if (zfcp_fsf_req_sbal_get(adapter))
1648 goto out;
1649
1650 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1651 adapter->pool.erp_req);
1652
1653 if (unlikely(IS_ERR(req))) {
1654 retval = PTR_ERR(req);
1655 goto out;
1656 }
1657
1658 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1659 sbale = zfcp_qdio_sbale_req(req);
1660 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1661 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1662
1663 req->handler = zfcp_fsf_open_wka_port_handler;
1664 req->qtcb->bottom.support.d_id = wka_port->d_id;
1665 req->data = wka_port;
1666
1667 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1668 retval = zfcp_fsf_req_send(req);
1669 if (retval)
1670 zfcp_fsf_req_free(req);
1671 out:
1672 spin_unlock_bh(&adapter->req_q_lock);
1673 return retval;
1674 }
1675
1676 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1677 {
1678 struct zfcp_wka_port *wka_port = req->data;
1679
1680 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1681 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1682 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1683 }
1684
1685 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1686 wake_up(&wka_port->completion_wq);
1687 }
1688
1689 /**
1690 * zfcp_fsf_close_wka_port - create and send close wka port request
1691 * @erp_action: pointer to struct zfcp_erp_action
1692 * Returns: 0 on success, error otherwise
1693 */
1694 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1695 {
1696 struct qdio_buffer_element *sbale;
1697 struct zfcp_adapter *adapter = wka_port->adapter;
1698 struct zfcp_fsf_req *req;
1699 int retval = -EIO;
1700
1701 spin_lock_bh(&adapter->req_q_lock);
1702 if (zfcp_fsf_req_sbal_get(adapter))
1703 goto out;
1704
1705 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1706 adapter->pool.erp_req);
1707
1708 if (unlikely(IS_ERR(req))) {
1709 retval = PTR_ERR(req);
1710 goto out;
1711 }
1712
1713 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1714 sbale = zfcp_qdio_sbale_req(req);
1715 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1716 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1717
1718 req->handler = zfcp_fsf_close_wka_port_handler;
1719 req->data = wka_port;
1720 req->qtcb->header.port_handle = wka_port->handle;
1721
1722 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1723 retval = zfcp_fsf_req_send(req);
1724 if (retval)
1725 zfcp_fsf_req_free(req);
1726 out:
1727 spin_unlock_bh(&adapter->req_q_lock);
1728 return retval;
1729 }
1730
1731 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1732 {
1733 struct zfcp_port *port = req->data;
1734 struct fsf_qtcb_header *header = &req->qtcb->header;
1735 struct zfcp_unit *unit;
1736
1737 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738 return;
1739
1740 switch (header->fsf_status) {
1741 case FSF_PORT_HANDLE_NOT_VALID:
1742 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1743 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1744 break;
1745 case FSF_ACCESS_DENIED:
1746 zfcp_fsf_access_denied_port(req, port);
1747 break;
1748 case FSF_PORT_BOXED:
1749 /* can't use generic zfcp_erp_modify_port_status because
1750 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1751 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1752 list_for_each_entry(unit, &port->unit_list_head, list)
1753 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1754 &unit->status);
1755 zfcp_erp_port_boxed(port, "fscpph2", req);
1756 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1757 ZFCP_STATUS_FSFREQ_RETRY;
1758
1759 break;
1760 case FSF_ADAPTER_STATUS_AVAILABLE:
1761 switch (header->fsf_status_qual.word[0]) {
1762 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1763 /* fall through */
1764 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1765 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1766 break;
1767 }
1768 break;
1769 case FSF_GOOD:
1770 /* can't use generic zfcp_erp_modify_port_status because
1771 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1772 */
1773 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1774 list_for_each_entry(unit, &port->unit_list_head, list)
1775 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1776 &unit->status);
1777 break;
1778 }
1779 }
1780
1781 /**
1782 * zfcp_fsf_close_physical_port - close physical port
1783 * @erp_action: pointer to struct zfcp_erp_action
1784 * Returns: 0 on success
1785 */
1786 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1787 {
1788 struct qdio_buffer_element *sbale;
1789 struct zfcp_adapter *adapter = erp_action->adapter;
1790 struct zfcp_fsf_req *req;
1791 int retval = -EIO;
1792
1793 spin_lock_bh(&adapter->req_q_lock);
1794 if (zfcp_fsf_req_sbal_get(adapter))
1795 goto out;
1796
1797 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1798 adapter->pool.erp_req);
1799
1800 if (IS_ERR(req)) {
1801 retval = PTR_ERR(req);
1802 goto out;
1803 }
1804
1805 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1806 sbale = zfcp_qdio_sbale_req(req);
1807 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1808 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1809
1810 req->data = erp_action->port;
1811 req->qtcb->header.port_handle = erp_action->port->handle;
1812 req->erp_action = erp_action;
1813 req->handler = zfcp_fsf_close_physical_port_handler;
1814 erp_action->fsf_req = req;
1815
1816 zfcp_fsf_start_erp_timer(req);
1817 retval = zfcp_fsf_req_send(req);
1818 if (retval) {
1819 zfcp_fsf_req_free(req);
1820 erp_action->fsf_req = NULL;
1821 }
1822 out:
1823 spin_unlock_bh(&adapter->req_q_lock);
1824 return retval;
1825 }
1826
1827 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1828 {
1829 struct zfcp_adapter *adapter = req->adapter;
1830 struct zfcp_unit *unit = req->data;
1831 struct fsf_qtcb_header *header = &req->qtcb->header;
1832 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1833 struct fsf_queue_designator *queue_designator =
1834 &header->fsf_status_qual.fsf_queue_designator;
1835 int exclusive, readwrite;
1836
1837 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1838 return;
1839
1840 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1841 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1842 ZFCP_STATUS_UNIT_SHARED |
1843 ZFCP_STATUS_UNIT_READONLY,
1844 &unit->status);
1845
1846 switch (header->fsf_status) {
1847
1848 case FSF_PORT_HANDLE_NOT_VALID:
1849 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1850 /* fall through */
1851 case FSF_LUN_ALREADY_OPEN:
1852 break;
1853 case FSF_ACCESS_DENIED:
1854 zfcp_fsf_access_denied_unit(req, unit);
1855 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1856 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1857 break;
1858 case FSF_PORT_BOXED:
1859 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1860 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1861 ZFCP_STATUS_FSFREQ_RETRY;
1862 break;
1863 case FSF_LUN_SHARING_VIOLATION:
1864 if (header->fsf_status_qual.word[0])
1865 dev_warn(&adapter->ccw_device->dev,
1866 "LUN 0x%Lx on port 0x%Lx is already in "
1867 "use by CSS%d, MIF Image ID %x\n",
1868 (unsigned long long)unit->fcp_lun,
1869 (unsigned long long)unit->port->wwpn,
1870 queue_designator->cssid,
1871 queue_designator->hla);
1872 else
1873 zfcp_act_eval_err(adapter,
1874 header->fsf_status_qual.word[2]);
1875 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1876 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1877 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1878 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1879 break;
1880 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1881 dev_warn(&adapter->ccw_device->dev,
1882 "No handle is available for LUN "
1883 "0x%016Lx on port 0x%016Lx\n",
1884 (unsigned long long)unit->fcp_lun,
1885 (unsigned long long)unit->port->wwpn);
1886 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1887 /* fall through */
1888 case FSF_INVALID_COMMAND_OPTION:
1889 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1890 break;
1891 case FSF_ADAPTER_STATUS_AVAILABLE:
1892 switch (header->fsf_status_qual.word[0]) {
1893 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1894 zfcp_test_link(unit->port);
1895 /* fall through */
1896 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898 break;
1899 }
1900 break;
1901
1902 case FSF_GOOD:
1903 unit->handle = header->lun_handle;
1904 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1905
1906 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1907 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1908 !zfcp_ccw_priv_sch(adapter)) {
1909 exclusive = (bottom->lun_access_info &
1910 FSF_UNIT_ACCESS_EXCLUSIVE);
1911 readwrite = (bottom->lun_access_info &
1912 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1913
1914 if (!exclusive)
1915 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1916 &unit->status);
1917
1918 if (!readwrite) {
1919 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1920 &unit->status);
1921 dev_info(&adapter->ccw_device->dev,
1922 "SCSI device at LUN 0x%016Lx on port "
1923 "0x%016Lx opened read-only\n",
1924 (unsigned long long)unit->fcp_lun,
1925 (unsigned long long)unit->port->wwpn);
1926 }
1927
1928 if (exclusive && !readwrite) {
1929 dev_err(&adapter->ccw_device->dev,
1930 "Exclusive read-only access not "
1931 "supported (unit 0x%016Lx, "
1932 "port 0x%016Lx)\n",
1933 (unsigned long long)unit->fcp_lun,
1934 (unsigned long long)unit->port->wwpn);
1935 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1936 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1937 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1938 } else if (!exclusive && readwrite) {
1939 dev_err(&adapter->ccw_device->dev,
1940 "Shared read-write access not "
1941 "supported (unit 0x%016Lx, port "
1942 "0x%016Lx)\n",
1943 (unsigned long long)unit->fcp_lun,
1944 (unsigned long long)unit->port->wwpn);
1945 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1946 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1947 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1948 }
1949 }
1950 break;
1951 }
1952 }
1953
1954 /**
1955 * zfcp_fsf_open_unit - open unit
1956 * @erp_action: pointer to struct zfcp_erp_action
1957 * Returns: 0 on success, error otherwise
1958 */
1959 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1960 {
1961 struct qdio_buffer_element *sbale;
1962 struct zfcp_adapter *adapter = erp_action->adapter;
1963 struct zfcp_fsf_req *req;
1964 int retval = -EIO;
1965
1966 spin_lock_bh(&adapter->req_q_lock);
1967 if (zfcp_fsf_req_sbal_get(adapter))
1968 goto out;
1969
1970 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1971 adapter->pool.erp_req);
1972
1973 if (IS_ERR(req)) {
1974 retval = PTR_ERR(req);
1975 goto out;
1976 }
1977
1978 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1979 sbale = zfcp_qdio_sbale_req(req);
1980 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1981 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1982
1983 req->qtcb->header.port_handle = erp_action->port->handle;
1984 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1985 req->handler = zfcp_fsf_open_unit_handler;
1986 req->data = erp_action->unit;
1987 req->erp_action = erp_action;
1988 erp_action->fsf_req = req;
1989
1990 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1991 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1992
1993 zfcp_fsf_start_erp_timer(req);
1994 retval = zfcp_fsf_req_send(req);
1995 if (retval) {
1996 zfcp_fsf_req_free(req);
1997 erp_action->fsf_req = NULL;
1998 }
1999 out:
2000 spin_unlock_bh(&adapter->req_q_lock);
2001 return retval;
2002 }
2003
2004 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2005 {
2006 struct zfcp_unit *unit = req->data;
2007
2008 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2009 return;
2010
2011 switch (req->qtcb->header.fsf_status) {
2012 case FSF_PORT_HANDLE_NOT_VALID:
2013 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2014 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2015 break;
2016 case FSF_LUN_HANDLE_NOT_VALID:
2017 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2018 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019 break;
2020 case FSF_PORT_BOXED:
2021 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2022 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2023 ZFCP_STATUS_FSFREQ_RETRY;
2024 break;
2025 case FSF_ADAPTER_STATUS_AVAILABLE:
2026 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2027 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2028 zfcp_test_link(unit->port);
2029 /* fall through */
2030 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2032 break;
2033 }
2034 break;
2035 case FSF_GOOD:
2036 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2037 break;
2038 }
2039 }
2040
2041 /**
2042 * zfcp_fsf_close_unit - close zfcp unit
2043 * @erp_action: pointer to struct zfcp_unit
2044 * Returns: 0 on success, error otherwise
2045 */
2046 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2047 {
2048 struct qdio_buffer_element *sbale;
2049 struct zfcp_adapter *adapter = erp_action->adapter;
2050 struct zfcp_fsf_req *req;
2051 int retval = -EIO;
2052
2053 spin_lock_bh(&adapter->req_q_lock);
2054 if (zfcp_fsf_req_sbal_get(adapter))
2055 goto out;
2056
2057 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2058 adapter->pool.erp_req);
2059
2060 if (IS_ERR(req)) {
2061 retval = PTR_ERR(req);
2062 goto out;
2063 }
2064
2065 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2066 sbale = zfcp_qdio_sbale_req(req);
2067 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2068 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2069
2070 req->qtcb->header.port_handle = erp_action->port->handle;
2071 req->qtcb->header.lun_handle = erp_action->unit->handle;
2072 req->handler = zfcp_fsf_close_unit_handler;
2073 req->data = erp_action->unit;
2074 req->erp_action = erp_action;
2075 erp_action->fsf_req = req;
2076
2077 zfcp_fsf_start_erp_timer(req);
2078 retval = zfcp_fsf_req_send(req);
2079 if (retval) {
2080 zfcp_fsf_req_free(req);
2081 erp_action->fsf_req = NULL;
2082 }
2083 out:
2084 spin_unlock_bh(&adapter->req_q_lock);
2085 return retval;
2086 }
2087
2088 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2089 {
2090 lat_rec->sum += lat;
2091 lat_rec->min = min(lat_rec->min, lat);
2092 lat_rec->max = max(lat_rec->max, lat);
2093 }
2094
2095 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2096 {
2097 struct fsf_qual_latency_info *lat_inf;
2098 struct latency_cont *lat;
2099 struct zfcp_unit *unit = req->unit;
2100
2101 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2102
2103 switch (req->qtcb->bottom.io.data_direction) {
2104 case FSF_DATADIR_READ:
2105 lat = &unit->latencies.read;
2106 break;
2107 case FSF_DATADIR_WRITE:
2108 lat = &unit->latencies.write;
2109 break;
2110 case FSF_DATADIR_CMND:
2111 lat = &unit->latencies.cmd;
2112 break;
2113 default:
2114 return;
2115 }
2116
2117 spin_lock(&unit->latencies.lock);
2118 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2119 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2120 lat->counter++;
2121 spin_unlock(&unit->latencies.lock);
2122 }
2123
2124 #ifdef CONFIG_BLK_DEV_IO_TRACE
2125 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2126 {
2127 struct fsf_qual_latency_info *lat_inf;
2128 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2129 struct request *req = scsi_cmnd->request;
2130 struct zfcp_blk_drv_data trace;
2131 int ticks = fsf_req->adapter->timer_ticks;
2132
2133 trace.flags = 0;
2134 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2135 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2136 trace.flags |= ZFCP_BLK_LAT_VALID;
2137 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2138 trace.channel_lat = lat_inf->channel_lat * ticks;
2139 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2140 }
2141 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2142 trace.flags |= ZFCP_BLK_REQ_ERROR;
2143 trace.inb_usage = fsf_req->qdio_inb_usage;
2144 trace.outb_usage = fsf_req->qdio_outb_usage;
2145
2146 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2147 }
2148 #else
2149 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2150 {
2151 }
2152 #endif
2153
2154 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2155 {
2156 struct scsi_cmnd *scpnt;
2157 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2158 &(req->qtcb->bottom.io.fcp_rsp);
2159 u32 sns_len;
2160 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2161 unsigned long flags;
2162
2163 read_lock_irqsave(&req->adapter->abort_lock, flags);
2164
2165 scpnt = req->data;
2166 if (unlikely(!scpnt)) {
2167 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2168 return;
2169 }
2170
2171 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2172 set_host_byte(scpnt, DID_SOFT_ERROR);
2173 goto skip_fsfstatus;
2174 }
2175
2176 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2177 set_host_byte(scpnt, DID_ERROR);
2178 goto skip_fsfstatus;
2179 }
2180
2181 set_msg_byte(scpnt, COMMAND_COMPLETE);
2182
2183 scpnt->result |= fcp_rsp_iu->scsi_status;
2184
2185 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2186 zfcp_fsf_req_latency(req);
2187
2188 zfcp_fsf_trace_latency(req);
2189
2190 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2191 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2192 set_host_byte(scpnt, DID_OK);
2193 else {
2194 set_host_byte(scpnt, DID_ERROR);
2195 goto skip_fsfstatus;
2196 }
2197 }
2198
2199 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2200 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2201 fcp_rsp_iu->fcp_rsp_len;
2202 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2203 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2204
2205 memcpy(scpnt->sense_buffer,
2206 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2207 }
2208
2209 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2210 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2211 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2212 scpnt->underflow)
2213 set_host_byte(scpnt, DID_ERROR);
2214 }
2215 skip_fsfstatus:
2216 if (scpnt->result != 0)
2217 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2218 else if (scpnt->retries > 0)
2219 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2220 else
2221 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2222
2223 scpnt->host_scribble = NULL;
2224 (scpnt->scsi_done) (scpnt);
2225 /*
2226 * We must hold this lock until scsi_done has been called.
2227 * Otherwise we may call scsi_done after abort regarding this
2228 * command has completed.
2229 * Note: scsi_done must not block!
2230 */
2231 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2232 }
2233
2234 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2235 {
2236 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2237 &(req->qtcb->bottom.io.fcp_rsp);
2238 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2239
2240 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2241 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2242 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2243 }
2244
2245
2246 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2247 {
2248 struct zfcp_unit *unit;
2249 struct fsf_qtcb_header *header = &req->qtcb->header;
2250
2251 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2252 unit = req->data;
2253 else
2254 unit = req->unit;
2255
2256 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2257 goto skip_fsfstatus;
2258
2259 switch (header->fsf_status) {
2260 case FSF_HANDLE_MISMATCH:
2261 case FSF_PORT_HANDLE_NOT_VALID:
2262 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2263 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2264 break;
2265 case FSF_FCPLUN_NOT_VALID:
2266 case FSF_LUN_HANDLE_NOT_VALID:
2267 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2268 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2269 break;
2270 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2271 zfcp_fsf_class_not_supp(req);
2272 break;
2273 case FSF_ACCESS_DENIED:
2274 zfcp_fsf_access_denied_unit(req, unit);
2275 break;
2276 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2277 dev_err(&req->adapter->ccw_device->dev,
2278 "Incorrect direction %d, unit 0x%016Lx on port "
2279 "0x%016Lx closed\n",
2280 req->qtcb->bottom.io.data_direction,
2281 (unsigned long long)unit->fcp_lun,
2282 (unsigned long long)unit->port->wwpn);
2283 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2284 req);
2285 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2286 break;
2287 case FSF_CMND_LENGTH_NOT_VALID:
2288 dev_err(&req->adapter->ccw_device->dev,
2289 "Incorrect CDB length %d, unit 0x%016Lx on "
2290 "port 0x%016Lx closed\n",
2291 req->qtcb->bottom.io.fcp_cmnd_length,
2292 (unsigned long long)unit->fcp_lun,
2293 (unsigned long long)unit->port->wwpn);
2294 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2295 req);
2296 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2297 break;
2298 case FSF_PORT_BOXED:
2299 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2300 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2301 ZFCP_STATUS_FSFREQ_RETRY;
2302 break;
2303 case FSF_LUN_BOXED:
2304 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2305 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2306 ZFCP_STATUS_FSFREQ_RETRY;
2307 break;
2308 case FSF_ADAPTER_STATUS_AVAILABLE:
2309 if (header->fsf_status_qual.word[0] ==
2310 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2311 zfcp_test_link(unit->port);
2312 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2313 break;
2314 }
2315 skip_fsfstatus:
2316 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2317 zfcp_fsf_send_fcp_ctm_handler(req);
2318 else {
2319 zfcp_fsf_send_fcp_command_task_handler(req);
2320 req->unit = NULL;
2321 zfcp_unit_put(unit);
2322 }
2323 }
2324
2325 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2326 {
2327 u32 *fcp_dl_ptr;
2328
2329 /*
2330 * fcp_dl_addr = start address of fcp_cmnd structure +
2331 * size of fixed part + size of dynamically sized add_dcp_cdb field
2332 * SEE FCP-2 documentation
2333 */
2334 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2335 (fcp_cmd->add_fcp_cdb_length << 2));
2336 *fcp_dl_ptr = fcp_dl;
2337 }
2338
2339 /**
2340 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2341 * @unit: unit where command is sent to
2342 * @scsi_cmnd: scsi command to be sent
2343 */
2344 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2345 struct scsi_cmnd *scsi_cmnd)
2346 {
2347 struct zfcp_fsf_req *req;
2348 struct fcp_cmnd_iu *fcp_cmnd_iu;
2349 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2350 int real_bytes, retval = -EIO;
2351 struct zfcp_adapter *adapter = unit->port->adapter;
2352
2353 if (unlikely(!(atomic_read(&unit->status) &
2354 ZFCP_STATUS_COMMON_UNBLOCKED)))
2355 return -EBUSY;
2356
2357 spin_lock(&adapter->req_q_lock);
2358 if (atomic_read(&adapter->req_q.count) <= 0) {
2359 atomic_inc(&adapter->qdio_outb_full);
2360 goto out;
2361 }
2362
2363 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2364 adapter->pool.scsi_req);
2365
2366 if (IS_ERR(req)) {
2367 retval = PTR_ERR(req);
2368 goto out;
2369 }
2370
2371 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2372 zfcp_unit_get(unit);
2373 req->unit = unit;
2374 req->data = scsi_cmnd;
2375 req->handler = zfcp_fsf_send_fcp_command_handler;
2376 req->qtcb->header.lun_handle = unit->handle;
2377 req->qtcb->header.port_handle = unit->port->handle;
2378 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2379
2380 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2381
2382 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2383 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2384 /*
2385 * set depending on data direction:
2386 * data direction bits in SBALE (SB Type)
2387 * data direction bits in QTCB
2388 * data direction bits in FCP_CMND IU
2389 */
2390 switch (scsi_cmnd->sc_data_direction) {
2391 case DMA_NONE:
2392 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2393 break;
2394 case DMA_FROM_DEVICE:
2395 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2396 fcp_cmnd_iu->rddata = 1;
2397 break;
2398 case DMA_TO_DEVICE:
2399 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2400 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2401 fcp_cmnd_iu->wddata = 1;
2402 break;
2403 case DMA_BIDIRECTIONAL:
2404 goto failed_scsi_cmnd;
2405 }
2406
2407 if (likely((scsi_cmnd->device->simple_tags) ||
2408 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2409 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2410 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2411 else
2412 fcp_cmnd_iu->task_attribute = UNTAGGED;
2413
2414 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2415 fcp_cmnd_iu->add_fcp_cdb_length =
2416 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2417
2418 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2419
2420 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2421 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2422
2423 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2424 scsi_sglist(scsi_cmnd),
2425 FSF_MAX_SBALS_PER_REQ);
2426 if (unlikely(real_bytes < 0)) {
2427 if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2428 dev_err(&adapter->ccw_device->dev,
2429 "Oversize data package, unit 0x%016Lx "
2430 "on port 0x%016Lx closed\n",
2431 (unsigned long long)unit->fcp_lun,
2432 (unsigned long long)unit->port->wwpn);
2433 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2434 retval = -EINVAL;
2435 }
2436 goto failed_scsi_cmnd;
2437 }
2438
2439 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2440
2441 retval = zfcp_fsf_req_send(req);
2442 if (unlikely(retval))
2443 goto failed_scsi_cmnd;
2444
2445 goto out;
2446
2447 failed_scsi_cmnd:
2448 zfcp_unit_put(unit);
2449 zfcp_fsf_req_free(req);
2450 scsi_cmnd->host_scribble = NULL;
2451 out:
2452 spin_unlock(&adapter->req_q_lock);
2453 return retval;
2454 }
2455
2456 /**
2457 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2458 * @unit: pointer to struct zfcp_unit
2459 * @tm_flags: unsigned byte for task management flags
2460 * Returns: on success pointer to struct fsf_req, NULL otherwise
2461 */
2462 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2463 {
2464 struct qdio_buffer_element *sbale;
2465 struct zfcp_fsf_req *req = NULL;
2466 struct fcp_cmnd_iu *fcp_cmnd_iu;
2467 struct zfcp_adapter *adapter = unit->port->adapter;
2468
2469 if (unlikely(!(atomic_read(&unit->status) &
2470 ZFCP_STATUS_COMMON_UNBLOCKED)))
2471 return NULL;
2472
2473 spin_lock_bh(&adapter->req_q_lock);
2474 if (zfcp_fsf_req_sbal_get(adapter))
2475 goto out;
2476
2477 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2478 adapter->pool.scsi_req);
2479
2480 if (IS_ERR(req)) {
2481 req = NULL;
2482 goto out;
2483 }
2484
2485 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2486 req->data = unit;
2487 req->handler = zfcp_fsf_send_fcp_command_handler;
2488 req->qtcb->header.lun_handle = unit->handle;
2489 req->qtcb->header.port_handle = unit->port->handle;
2490 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2491 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2492 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2493 sizeof(u32);
2494
2495 sbale = zfcp_qdio_sbale_req(req);
2496 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2497 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2498
2499 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2500 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2501 fcp_cmnd_iu->task_management_flags = tm_flags;
2502
2503 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2504 if (!zfcp_fsf_req_send(req))
2505 goto out;
2506
2507 zfcp_fsf_req_free(req);
2508 req = NULL;
2509 out:
2510 spin_unlock_bh(&adapter->req_q_lock);
2511 return req;
2512 }
2513
2514 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2515 {
2516 }
2517
2518 /**
2519 * zfcp_fsf_control_file - control file upload/download
2520 * @adapter: pointer to struct zfcp_adapter
2521 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2522 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2523 */
2524 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2525 struct zfcp_fsf_cfdc *fsf_cfdc)
2526 {
2527 struct qdio_buffer_element *sbale;
2528 struct zfcp_fsf_req *req = NULL;
2529 struct fsf_qtcb_bottom_support *bottom;
2530 int direction, retval = -EIO, bytes;
2531
2532 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2533 return ERR_PTR(-EOPNOTSUPP);
2534
2535 switch (fsf_cfdc->command) {
2536 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2537 direction = SBAL_FLAGS0_TYPE_WRITE;
2538 break;
2539 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2540 direction = SBAL_FLAGS0_TYPE_READ;
2541 break;
2542 default:
2543 return ERR_PTR(-EINVAL);
2544 }
2545
2546 spin_lock_bh(&adapter->req_q_lock);
2547 if (zfcp_fsf_req_sbal_get(adapter))
2548 goto out;
2549
2550 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, NULL);
2551 if (IS_ERR(req)) {
2552 retval = -EPERM;
2553 goto out;
2554 }
2555
2556 req->handler = zfcp_fsf_control_file_handler;
2557
2558 sbale = zfcp_qdio_sbale_req(req);
2559 sbale[0].flags |= direction;
2560
2561 bottom = &req->qtcb->bottom.support;
2562 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2563 bottom->option = fsf_cfdc->option;
2564
2565 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2566 FSF_MAX_SBALS_PER_REQ);
2567 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2568 zfcp_fsf_req_free(req);
2569 goto out;
2570 }
2571
2572 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2573 retval = zfcp_fsf_req_send(req);
2574 out:
2575 spin_unlock_bh(&adapter->req_q_lock);
2576
2577 if (!retval) {
2578 wait_for_completion(&req->completion);
2579 return req;
2580 }
2581 return ERR_PTR(retval);
2582 }
2583
2584 /**
2585 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2586 * @adapter: pointer to struct zfcp_adapter
2587 * @sbal_idx: response queue index of SBAL to be processed
2588 */
2589 void zfcp_fsf_reqid_check(struct zfcp_adapter *adapter, int sbal_idx)
2590 {
2591 struct qdio_buffer *sbal = adapter->resp_q.sbal[sbal_idx];
2592 struct qdio_buffer_element *sbale;
2593 struct zfcp_fsf_req *fsf_req;
2594 unsigned long flags, req_id;
2595 int idx;
2596
2597 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2598
2599 sbale = &sbal->element[idx];
2600 req_id = (unsigned long) sbale->addr;
2601 spin_lock_irqsave(&adapter->req_list_lock, flags);
2602 fsf_req = zfcp_reqlist_find(adapter, req_id);
2603
2604 if (!fsf_req)
2605 /*
2606 * Unknown request means that we have potentially memory
2607 * corruption and must stop the machine immediately.
2608 */
2609 panic("error: unknown req_id (%lx) on adapter %s.\n",
2610 req_id, dev_name(&adapter->ccw_device->dev));
2611
2612 list_del(&fsf_req->list);
2613 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2614
2615 fsf_req->sbal_response = sbal_idx;
2616 fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
2617 zfcp_fsf_req_complete(fsf_req);
2618
2619 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2620 break;
2621 }
2622 }
Linux kernel - Deliverables
This page took 0.082433 seconds and 4 git commands to generate.