?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
JBD: round commit timer up to avoid uncommitted transaction
[linux/fpc-iii.git] / drivers / s390 / scsi / zfcp_fsf.c
blobf09c863dc6bd1f85dba0eebcc2500ed58b93f4cc
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_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
252 mempool_free(sr_buf, adapter->pool.status_read_data);
253 zfcp_fsf_req_free(req);
254 return;
255 }
256
257 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, 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_dbf_hba_berr(adapter->dbf, 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_dbf_hba_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_qdio *qdio)
641 {
642 struct zfcp_qdio_queue *req_q = &qdio->req_q;
643
644 spin_lock_bh(&qdio->req_q_lock);
645 if (atomic_read(&req_q->count))
646 return 1;
647 spin_unlock_bh(&qdio->req_q_lock);
648 return 0;
649 }
650
651 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
652 {
653 struct zfcp_adapter *adapter = qdio->adapter;
654 long ret;
655
656 spin_unlock_bh(&qdio->req_q_lock);
657 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
658 zfcp_fsf_sbal_check(qdio), 5 * HZ);
659 if (ret > 0)
660 return 0;
661 if (!ret) {
662 atomic_inc(&qdio->req_q_full);
663 /* assume hanging outbound queue, try queue recovery */
664 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
665 }
666
667 spin_lock_bh(&qdio->req_q_lock);
668 return -EIO;
669 }
670
671 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
672 {
673 struct zfcp_fsf_req *req;
674
675 if (likely(pool))
676 req = mempool_alloc(pool, GFP_ATOMIC);
677 else
678 req = kmalloc(sizeof(*req), GFP_ATOMIC);
679
680 if (unlikely(!req))
681 return NULL;
682
683 memset(req, 0, sizeof(*req));
684 req->pool = pool;
685 return req;
686 }
687
688 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
689 {
690 struct fsf_qtcb *qtcb;
691
692 if (likely(pool))
693 qtcb = mempool_alloc(pool, GFP_ATOMIC);
694 else
695 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
696
697 if (unlikely(!qtcb))
698 return NULL;
699
700 memset(qtcb, 0, sizeof(*qtcb));
701 return qtcb;
702 }
703
704 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
705 u32 fsf_cmd, mempool_t *pool)
706 {
707 struct qdio_buffer_element *sbale;
708 struct zfcp_qdio_queue *req_q = &qdio->req_q;
709 struct zfcp_adapter *adapter = qdio->adapter;
710 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
711
712 if (unlikely(!req))
713 return ERR_PTR(-ENOMEM);
714
715 if (adapter->req_no == 0)
716 adapter->req_no++;
717
718 INIT_LIST_HEAD(&req->list);
719 init_timer(&req->timer);
720 init_completion(&req->completion);
721
722 req->adapter = adapter;
723 req->fsf_command = fsf_cmd;
724 req->req_id = adapter->req_no;
725 req->queue_req.sbal_number = 1;
726 req->queue_req.sbal_first = req_q->first;
727 req->queue_req.sbal_last = req_q->first;
728 req->queue_req.sbale_curr = 1;
729
730 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
731 sbale[0].addr = (void *) req->req_id;
732 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
733
734 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
735 if (likely(pool))
736 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
737 else
738 req->qtcb = zfcp_qtcb_alloc(NULL);
739
740 if (unlikely(!req->qtcb)) {
741 zfcp_fsf_req_free(req);
742 return ERR_PTR(-ENOMEM);
743 }
744
745 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
746 req->qtcb->prefix.req_id = req->req_id;
747 req->qtcb->prefix.ulp_info = 26;
748 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
749 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
750 req->qtcb->header.req_handle = req->req_id;
751 req->qtcb->header.fsf_command = req->fsf_command;
752 req->seq_no = adapter->fsf_req_seq_no;
753 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
754 sbale[1].addr = (void *) req->qtcb;
755 sbale[1].length = sizeof(struct fsf_qtcb);
756 }
757
758 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
759 zfcp_fsf_req_free(req);
760 return ERR_PTR(-EIO);
761 }
762
763 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 *qdio = adapter->qdio;
770 unsigned long flags;
771 int idx;
772 int with_qtcb = (req->qtcb != NULL);
773
774 /* put allocated FSF request into hash table */
775 spin_lock_irqsave(&adapter->req_list_lock, flags);
776 idx = zfcp_reqlist_hash(req->req_id);
777 list_add_tail(&req->list, &adapter->req_list[idx]);
778 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
779
780 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
781 req->issued = get_clock();
782 if (zfcp_qdio_send(qdio, &req->queue_req)) {
783 del_timer(&req->timer);
784 spin_lock_irqsave(&adapter->req_list_lock, flags);
785 /* lookup request again, list might have changed */
786 if (zfcp_reqlist_find_safe(adapter, req))
787 zfcp_reqlist_remove(adapter, req);
788 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
789 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
790 return -EIO;
791 }
792
793 /* Don't increase for unsolicited status */
794 if (with_qtcb)
795 adapter->fsf_req_seq_no++;
796 adapter->req_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_qdio *qdio)
808 {
809 struct zfcp_adapter *adapter = qdio->adapter;
810 struct zfcp_fsf_req *req;
811 struct fsf_status_read_buffer *sr_buf;
812 struct qdio_buffer_element *sbale;
813 int retval = -EIO;
814
815 spin_lock_bh(&qdio->req_q_lock);
816 if (zfcp_fsf_req_sbal_get(qdio))
817 goto out;
818
819 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
820 adapter->pool.status_read_req);
821 if (IS_ERR(req)) {
822 retval = PTR_ERR(req);
823 goto out;
824 }
825
826 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->queue_req.sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
840
841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
844
845 goto out;
846
847 failed_req_send:
848 mempool_free(sr_buf, adapter->pool.status_read_data);
849 failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
852 out:
853 spin_unlock_bh(&qdio->req_q_lock);
854 return retval;
855 }
856
857 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858 {
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
866 case FSF_PORT_HANDLE_NOT_VALID:
867 if (fsq->word[0] == fsq->word[1]) {
868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
871 }
872 break;
873 case FSF_LUN_HANDLE_NOT_VALID:
874 if (fsq->word[0] == fsq->word[1]) {
875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
877 }
878 break;
879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
881 break;
882 case FSF_PORT_BOXED:
883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
886 break;
887 case FSF_LUN_BOXED:
888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_ADAPTER_STATUS_AVAILABLE:
893 switch (fsq->word[0]) {
894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
895 zfcp_fc_test_link(unit->port);
896 /* fall through */
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 * @unit: pointer to struct zfcp_unit
912 * Returns: pointer to struct zfcp_fsf_req
913 */
914
915 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
916 struct zfcp_unit *unit)
917 {
918 struct qdio_buffer_element *sbale;
919 struct zfcp_fsf_req *req = NULL;
920 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
921
922 spin_lock_bh(&qdio->req_q_lock);
923 if (zfcp_fsf_req_sbal_get(qdio))
924 goto out;
925 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
926 qdio->adapter->pool.scsi_abort);
927 if (IS_ERR(req)) {
928 req = NULL;
929 goto out;
930 }
931
932 if (unlikely(!(atomic_read(&unit->status) &
933 ZFCP_STATUS_COMMON_UNBLOCKED)))
934 goto out_error_free;
935
936 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
937 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
938 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
939
940 req->data = unit;
941 req->handler = zfcp_fsf_abort_fcp_command_handler;
942 req->qtcb->header.lun_handle = unit->handle;
943 req->qtcb->header.port_handle = unit->port->handle;
944 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
945
946 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
947 if (!zfcp_fsf_req_send(req))
948 goto out;
949
950 out_error_free:
951 zfcp_fsf_req_free(req);
952 req = NULL;
953 out:
954 spin_unlock_bh(&qdio->req_q_lock);
955 return req;
956 }
957
958 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
959 {
960 struct zfcp_adapter *adapter = req->adapter;
961 struct zfcp_send_ct *send_ct = req->data;
962 struct fsf_qtcb_header *header = &req->qtcb->header;
963
964 send_ct->status = -EINVAL;
965
966 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
967 goto skip_fsfstatus;
968
969 switch (header->fsf_status) {
970 case FSF_GOOD:
971 zfcp_dbf_san_ct_response(req);
972 send_ct->status = 0;
973 break;
974 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
975 zfcp_fsf_class_not_supp(req);
976 break;
977 case FSF_ADAPTER_STATUS_AVAILABLE:
978 switch (header->fsf_status_qual.word[0]){
979 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
980 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
981 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
982 break;
983 }
984 break;
985 case FSF_ACCESS_DENIED:
986 break;
987 case FSF_PORT_BOXED:
988 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
989 ZFCP_STATUS_FSFREQ_RETRY;
990 break;
991 case FSF_PORT_HANDLE_NOT_VALID:
992 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
993 /* fall through */
994 case FSF_GENERIC_COMMAND_REJECTED:
995 case FSF_PAYLOAD_SIZE_MISMATCH:
996 case FSF_REQUEST_SIZE_TOO_LARGE:
997 case FSF_RESPONSE_SIZE_TOO_LARGE:
998 case FSF_SBAL_MISMATCH:
999 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1000 break;
1001 }
1002
1003 skip_fsfstatus:
1004 if (send_ct->handler)
1005 send_ct->handler(send_ct->handler_data);
1006 }
1007
1008 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1009 struct scatterlist *sg_req,
1010 struct scatterlist *sg_resp)
1011 {
1012 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1013 sbale[2].addr = sg_virt(sg_req);
1014 sbale[2].length = sg_req->length;
1015 sbale[3].addr = sg_virt(sg_resp);
1016 sbale[3].length = sg_resp->length;
1017 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1018 }
1019
1020 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1021 {
1022 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1023 }
1024
1025 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1026 struct scatterlist *sg_req,
1027 struct scatterlist *sg_resp,
1028 int max_sbals)
1029 {
1030 struct zfcp_adapter *adapter = req->adapter;
1031 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1032 &req->queue_req);
1033 u32 feat = adapter->adapter_features;
1034 int bytes;
1035
1036 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1037 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1038 return -EOPNOTSUPP;
1039
1040 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041 return 0;
1042 }
1043
1044 /* use single, unchained SBAL if it can hold the request */
1045 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1046 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1047 return 0;
1048 }
1049
1050 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1051 SBAL_FLAGS0_TYPE_WRITE_READ,
1052 sg_req, max_sbals);
1053 if (bytes <= 0)
1054 return -EIO;
1055 req->qtcb->bottom.support.req_buf_length = bytes;
1056 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1057
1058 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1059 SBAL_FLAGS0_TYPE_WRITE_READ,
1060 sg_resp, max_sbals);
1061 if (bytes <= 0)
1062 return -EIO;
1063
1064 /* common settings for ct/gs and els requests */
1065 req->qtcb->bottom.support.resp_buf_length = bytes;
1066 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1067 req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
1068 zfcp_fsf_start_timer(req, 2 * R_A_TOV + 10);
1069
1070 return 0;
1071 }
1072
1073 /**
1074 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1075 * @ct: pointer to struct zfcp_send_ct with data for request
1076 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1077 */
1078 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1079 {
1080 struct zfcp_wka_port *wka_port = ct->wka_port;
1081 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1082 struct zfcp_fsf_req *req;
1083 int ret = -EIO;
1084
1085 spin_lock_bh(&qdio->req_q_lock);
1086 if (zfcp_fsf_req_sbal_get(qdio))
1087 goto out;
1088
1089 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1090
1091 if (IS_ERR(req)) {
1092 ret = PTR_ERR(req);
1093 goto out;
1094 }
1095
1096 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1097 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1098 FSF_MAX_SBALS_PER_REQ);
1099 if (ret)
1100 goto failed_send;
1101
1102 req->handler = zfcp_fsf_send_ct_handler;
1103 req->qtcb->header.port_handle = wka_port->handle;
1104 req->data = ct;
1105
1106 zfcp_dbf_san_ct_request(req);
1107
1108 ret = zfcp_fsf_req_send(req);
1109 if (ret)
1110 goto failed_send;
1111
1112 goto out;
1113
1114 failed_send:
1115 zfcp_fsf_req_free(req);
1116 out:
1117 spin_unlock_bh(&qdio->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_dbf_san_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_fc_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_qdio *qdio = els->adapter->qdio;
1181 int ret = -EIO;
1182
1183 spin_lock_bh(&qdio->req_q_lock);
1184 if (zfcp_fsf_req_sbal_get(qdio))
1185 goto out;
1186
1187 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1188
1189 if (IS_ERR(req)) {
1190 ret = PTR_ERR(req);
1191 goto out;
1192 }
1193
1194 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1195 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1196
1197 if (ret)
1198 goto failed_send;
1199
1200 req->qtcb->bottom.support.d_id = els->d_id;
1201 req->handler = zfcp_fsf_send_els_handler;
1202 req->data = els;
1203
1204 zfcp_dbf_san_els_request(req);
1205
1206 ret = zfcp_fsf_req_send(req);
1207 if (ret)
1208 goto failed_send;
1209
1210 goto out;
1211
1212 failed_send:
1213 zfcp_fsf_req_free(req);
1214 out:
1215 spin_unlock_bh(&qdio->req_q_lock);
1216 return ret;
1217 }
1218
1219 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1220 {
1221 struct qdio_buffer_element *sbale;
1222 struct zfcp_fsf_req *req;
1223 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1224 int retval = -EIO;
1225
1226 spin_lock_bh(&qdio->req_q_lock);
1227 if (zfcp_fsf_req_sbal_get(qdio))
1228 goto out;
1229
1230 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1231 qdio->adapter->pool.erp_req);
1232
1233 if (IS_ERR(req)) {
1234 retval = PTR_ERR(req);
1235 goto out;
1236 }
1237
1238 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1239 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1240 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1241 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1242
1243 req->qtcb->bottom.config.feature_selection =
1244 FSF_FEATURE_CFDC |
1245 FSF_FEATURE_LUN_SHARING |
1246 FSF_FEATURE_NOTIFICATION_LOST |
1247 FSF_FEATURE_UPDATE_ALERT;
1248 req->erp_action = erp_action;
1249 req->handler = zfcp_fsf_exchange_config_data_handler;
1250 erp_action->fsf_req = req;
1251
1252 zfcp_fsf_start_erp_timer(req);
1253 retval = zfcp_fsf_req_send(req);
1254 if (retval) {
1255 zfcp_fsf_req_free(req);
1256 erp_action->fsf_req = NULL;
1257 }
1258 out:
1259 spin_unlock_bh(&qdio->req_q_lock);
1260 return retval;
1261 }
1262
1263 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1264 struct fsf_qtcb_bottom_config *data)
1265 {
1266 struct qdio_buffer_element *sbale;
1267 struct zfcp_fsf_req *req = NULL;
1268 int retval = -EIO;
1269
1270 spin_lock_bh(&qdio->req_q_lock);
1271 if (zfcp_fsf_req_sbal_get(qdio))
1272 goto out_unlock;
1273
1274 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1275
1276 if (IS_ERR(req)) {
1277 retval = PTR_ERR(req);
1278 goto out_unlock;
1279 }
1280
1281 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1282 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1283 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1284 req->handler = zfcp_fsf_exchange_config_data_handler;
1285
1286 req->qtcb->bottom.config.feature_selection =
1287 FSF_FEATURE_CFDC |
1288 FSF_FEATURE_LUN_SHARING |
1289 FSF_FEATURE_NOTIFICATION_LOST |
1290 FSF_FEATURE_UPDATE_ALERT;
1291
1292 if (data)
1293 req->data = data;
1294
1295 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1296 retval = zfcp_fsf_req_send(req);
1297 spin_unlock_bh(&qdio->req_q_lock);
1298 if (!retval)
1299 wait_for_completion(&req->completion);
1300
1301 zfcp_fsf_req_free(req);
1302 return retval;
1303
1304 out_unlock:
1305 spin_unlock_bh(&qdio->req_q_lock);
1306 return retval;
1307 }
1308
1309 /**
1310 * zfcp_fsf_exchange_port_data - request information about local port
1311 * @erp_action: ERP action for the adapter for which port data is requested
1312 * Returns: 0 on success, error otherwise
1313 */
1314 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1315 {
1316 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1317 struct qdio_buffer_element *sbale;
1318 struct zfcp_fsf_req *req;
1319 int retval = -EIO;
1320
1321 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1322 return -EOPNOTSUPP;
1323
1324 spin_lock_bh(&qdio->req_q_lock);
1325 if (zfcp_fsf_req_sbal_get(qdio))
1326 goto out;
1327
1328 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1329 qdio->adapter->pool.erp_req);
1330
1331 if (IS_ERR(req)) {
1332 retval = PTR_ERR(req);
1333 goto out;
1334 }
1335
1336 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1337 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1338 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1339 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1340
1341 req->handler = zfcp_fsf_exchange_port_data_handler;
1342 req->erp_action = erp_action;
1343 erp_action->fsf_req = req;
1344
1345 zfcp_fsf_start_erp_timer(req);
1346 retval = zfcp_fsf_req_send(req);
1347 if (retval) {
1348 zfcp_fsf_req_free(req);
1349 erp_action->fsf_req = NULL;
1350 }
1351 out:
1352 spin_unlock_bh(&qdio->req_q_lock);
1353 return retval;
1354 }
1355
1356 /**
1357 * zfcp_fsf_exchange_port_data_sync - request information about local port
1358 * @qdio: pointer to struct zfcp_qdio
1359 * @data: pointer to struct fsf_qtcb_bottom_port
1360 * Returns: 0 on success, error otherwise
1361 */
1362 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1363 struct fsf_qtcb_bottom_port *data)
1364 {
1365 struct qdio_buffer_element *sbale;
1366 struct zfcp_fsf_req *req = NULL;
1367 int retval = -EIO;
1368
1369 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1370 return -EOPNOTSUPP;
1371
1372 spin_lock_bh(&qdio->req_q_lock);
1373 if (zfcp_fsf_req_sbal_get(qdio))
1374 goto out_unlock;
1375
1376 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1377
1378 if (IS_ERR(req)) {
1379 retval = PTR_ERR(req);
1380 goto out_unlock;
1381 }
1382
1383 if (data)
1384 req->data = data;
1385
1386 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1387 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1388 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1389
1390 req->handler = zfcp_fsf_exchange_port_data_handler;
1391 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1392 retval = zfcp_fsf_req_send(req);
1393 spin_unlock_bh(&qdio->req_q_lock);
1394
1395 if (!retval)
1396 wait_for_completion(&req->completion);
1397
1398 zfcp_fsf_req_free(req);
1399
1400 return retval;
1401
1402 out_unlock:
1403 spin_unlock_bh(&qdio->req_q_lock);
1404 return retval;
1405 }
1406
1407 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1408 {
1409 struct zfcp_port *port = req->data;
1410 struct fsf_qtcb_header *header = &req->qtcb->header;
1411 struct fsf_plogi *plogi;
1412
1413 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1414 goto out;
1415
1416 switch (header->fsf_status) {
1417 case FSF_PORT_ALREADY_OPEN:
1418 break;
1419 case FSF_ACCESS_DENIED:
1420 zfcp_fsf_access_denied_port(req, port);
1421 break;
1422 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1423 dev_warn(&req->adapter->ccw_device->dev,
1424 "Not enough FCP adapter resources to open "
1425 "remote port 0x%016Lx\n",
1426 (unsigned long long)port->wwpn);
1427 zfcp_erp_port_failed(port, "fsoph_1", req);
1428 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1429 break;
1430 case FSF_ADAPTER_STATUS_AVAILABLE:
1431 switch (header->fsf_status_qual.word[0]) {
1432 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1433 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1434 case FSF_SQ_NO_RETRY_POSSIBLE:
1435 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1436 break;
1437 }
1438 break;
1439 case FSF_GOOD:
1440 port->handle = header->port_handle;
1441 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1442 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1443 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1444 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1445 &port->status);
1446 /* check whether D_ID has changed during open */
1447 /*
1448 * FIXME: This check is not airtight, as the FCP channel does
1449 * not monitor closures of target port connections caused on
1450 * the remote side. Thus, they might miss out on invalidating
1451 * locally cached WWPNs (and other N_Port parameters) of gone
1452 * target ports. So, our heroic attempt to make things safe
1453 * could be undermined by 'open port' response data tagged with
1454 * obsolete WWPNs. Another reason to monitor potential
1455 * connection closures ourself at least (by interpreting
1456 * incoming ELS' and unsolicited status). It just crosses my
1457 * mind that one should be able to cross-check by means of
1458 * another GID_PN straight after a port has been opened.
1459 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1460 */
1461 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1462 if (req->qtcb->bottom.support.els1_length >=
1463 FSF_PLOGI_MIN_LEN) {
1464 if (plogi->serv_param.wwpn != port->wwpn)
1465 port->d_id = 0;
1466 else {
1467 port->wwnn = plogi->serv_param.wwnn;
1468 zfcp_fc_plogi_evaluate(port, plogi);
1469 }
1470 }
1471 break;
1472 case FSF_UNKNOWN_OP_SUBTYPE:
1473 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1474 break;
1475 }
1476
1477 out:
1478 zfcp_port_put(port);
1479 }
1480
1481 /**
1482 * zfcp_fsf_open_port - create and send open port request
1483 * @erp_action: pointer to struct zfcp_erp_action
1484 * Returns: 0 on success, error otherwise
1485 */
1486 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1487 {
1488 struct qdio_buffer_element *sbale;
1489 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1490 struct zfcp_port *port = erp_action->port;
1491 struct zfcp_fsf_req *req;
1492 int retval = -EIO;
1493
1494 spin_lock_bh(&qdio->req_q_lock);
1495 if (zfcp_fsf_req_sbal_get(qdio))
1496 goto out;
1497
1498 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1499 qdio->adapter->pool.erp_req);
1500
1501 if (IS_ERR(req)) {
1502 retval = PTR_ERR(req);
1503 goto out;
1504 }
1505
1506 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1507 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1508 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1509 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1510
1511 req->handler = zfcp_fsf_open_port_handler;
1512 req->qtcb->bottom.support.d_id = port->d_id;
1513 req->data = port;
1514 req->erp_action = erp_action;
1515 erp_action->fsf_req = req;
1516 zfcp_port_get(port);
1517
1518 zfcp_fsf_start_erp_timer(req);
1519 retval = zfcp_fsf_req_send(req);
1520 if (retval) {
1521 zfcp_fsf_req_free(req);
1522 erp_action->fsf_req = NULL;
1523 zfcp_port_put(port);
1524 }
1525 out:
1526 spin_unlock_bh(&qdio->req_q_lock);
1527 return retval;
1528 }
1529
1530 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1531 {
1532 struct zfcp_port *port = req->data;
1533
1534 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1535 return;
1536
1537 switch (req->qtcb->header.fsf_status) {
1538 case FSF_PORT_HANDLE_NOT_VALID:
1539 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1540 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1541 break;
1542 case FSF_ADAPTER_STATUS_AVAILABLE:
1543 break;
1544 case FSF_GOOD:
1545 zfcp_erp_modify_port_status(port, "fscph_2", req,
1546 ZFCP_STATUS_COMMON_OPEN,
1547 ZFCP_CLEAR);
1548 break;
1549 }
1550 }
1551
1552 /**
1553 * zfcp_fsf_close_port - create and send close port request
1554 * @erp_action: pointer to struct zfcp_erp_action
1555 * Returns: 0 on success, error otherwise
1556 */
1557 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1558 {
1559 struct qdio_buffer_element *sbale;
1560 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1561 struct zfcp_fsf_req *req;
1562 int retval = -EIO;
1563
1564 spin_lock_bh(&qdio->req_q_lock);
1565 if (zfcp_fsf_req_sbal_get(qdio))
1566 goto out;
1567
1568 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1569 qdio->adapter->pool.erp_req);
1570
1571 if (IS_ERR(req)) {
1572 retval = PTR_ERR(req);
1573 goto out;
1574 }
1575
1576 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1577 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1578 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1579 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1580
1581 req->handler = zfcp_fsf_close_port_handler;
1582 req->data = erp_action->port;
1583 req->erp_action = erp_action;
1584 req->qtcb->header.port_handle = erp_action->port->handle;
1585 erp_action->fsf_req = req;
1586
1587 zfcp_fsf_start_erp_timer(req);
1588 retval = zfcp_fsf_req_send(req);
1589 if (retval) {
1590 zfcp_fsf_req_free(req);
1591 erp_action->fsf_req = NULL;
1592 }
1593 out:
1594 spin_unlock_bh(&qdio->req_q_lock);
1595 return retval;
1596 }
1597
1598 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1599 {
1600 struct zfcp_wka_port *wka_port = req->data;
1601 struct fsf_qtcb_header *header = &req->qtcb->header;
1602
1603 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1604 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1605 goto out;
1606 }
1607
1608 switch (header->fsf_status) {
1609 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1610 dev_warn(&req->adapter->ccw_device->dev,
1611 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1612 /* fall through */
1613 case FSF_ADAPTER_STATUS_AVAILABLE:
1614 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1615 /* fall through */
1616 case FSF_ACCESS_DENIED:
1617 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1618 break;
1619 case FSF_GOOD:
1620 wka_port->handle = header->port_handle;
1621 /* fall through */
1622 case FSF_PORT_ALREADY_OPEN:
1623 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1624 }
1625 out:
1626 wake_up(&wka_port->completion_wq);
1627 }
1628
1629 /**
1630 * zfcp_fsf_open_wka_port - create and send open wka-port request
1631 * @wka_port: pointer to struct zfcp_wka_port
1632 * Returns: 0 on success, error otherwise
1633 */
1634 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1635 {
1636 struct qdio_buffer_element *sbale;
1637 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1638 struct zfcp_fsf_req *req;
1639 int retval = -EIO;
1640
1641 spin_lock_bh(&qdio->req_q_lock);
1642 if (zfcp_fsf_req_sbal_get(qdio))
1643 goto out;
1644
1645 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1646 qdio->adapter->pool.erp_req);
1647
1648 if (unlikely(IS_ERR(req))) {
1649 retval = PTR_ERR(req);
1650 goto out;
1651 }
1652
1653 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1654 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1655 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1656 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1657
1658 req->handler = zfcp_fsf_open_wka_port_handler;
1659 req->qtcb->bottom.support.d_id = wka_port->d_id;
1660 req->data = wka_port;
1661
1662 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1663 retval = zfcp_fsf_req_send(req);
1664 if (retval)
1665 zfcp_fsf_req_free(req);
1666 out:
1667 spin_unlock_bh(&qdio->req_q_lock);
1668 return retval;
1669 }
1670
1671 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1672 {
1673 struct zfcp_wka_port *wka_port = req->data;
1674
1675 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1676 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1677 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1678 }
1679
1680 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1681 wake_up(&wka_port->completion_wq);
1682 }
1683
1684 /**
1685 * zfcp_fsf_close_wka_port - create and send close wka port request
1686 * @erp_action: pointer to struct zfcp_erp_action
1687 * Returns: 0 on success, error otherwise
1688 */
1689 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1690 {
1691 struct qdio_buffer_element *sbale;
1692 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1693 struct zfcp_fsf_req *req;
1694 int retval = -EIO;
1695
1696 spin_lock_bh(&qdio->req_q_lock);
1697 if (zfcp_fsf_req_sbal_get(qdio))
1698 goto out;
1699
1700 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1701 qdio->adapter->pool.erp_req);
1702
1703 if (unlikely(IS_ERR(req))) {
1704 retval = PTR_ERR(req);
1705 goto out;
1706 }
1707
1708 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1709 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1710 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1711 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1712
1713 req->handler = zfcp_fsf_close_wka_port_handler;
1714 req->data = wka_port;
1715 req->qtcb->header.port_handle = wka_port->handle;
1716
1717 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1718 retval = zfcp_fsf_req_send(req);
1719 if (retval)
1720 zfcp_fsf_req_free(req);
1721 out:
1722 spin_unlock_bh(&qdio->req_q_lock);
1723 return retval;
1724 }
1725
1726 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1727 {
1728 struct zfcp_port *port = req->data;
1729 struct fsf_qtcb_header *header = &req->qtcb->header;
1730 struct zfcp_unit *unit;
1731
1732 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1733 return;
1734
1735 switch (header->fsf_status) {
1736 case FSF_PORT_HANDLE_NOT_VALID:
1737 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1738 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1739 break;
1740 case FSF_ACCESS_DENIED:
1741 zfcp_fsf_access_denied_port(req, port);
1742 break;
1743 case FSF_PORT_BOXED:
1744 /* can't use generic zfcp_erp_modify_port_status because
1745 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1746 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1747 list_for_each_entry(unit, &port->unit_list_head, list)
1748 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1749 &unit->status);
1750 zfcp_erp_port_boxed(port, "fscpph2", req);
1751 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1752 ZFCP_STATUS_FSFREQ_RETRY;
1753
1754 break;
1755 case FSF_ADAPTER_STATUS_AVAILABLE:
1756 switch (header->fsf_status_qual.word[0]) {
1757 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1758 /* fall through */
1759 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1760 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1761 break;
1762 }
1763 break;
1764 case FSF_GOOD:
1765 /* can't use generic zfcp_erp_modify_port_status because
1766 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1767 */
1768 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1769 list_for_each_entry(unit, &port->unit_list_head, list)
1770 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1771 &unit->status);
1772 break;
1773 }
1774 }
1775
1776 /**
1777 * zfcp_fsf_close_physical_port - close physical port
1778 * @erp_action: pointer to struct zfcp_erp_action
1779 * Returns: 0 on success
1780 */
1781 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1782 {
1783 struct qdio_buffer_element *sbale;
1784 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1785 struct zfcp_fsf_req *req;
1786 int retval = -EIO;
1787
1788 spin_lock_bh(&qdio->req_q_lock);
1789 if (zfcp_fsf_req_sbal_get(qdio))
1790 goto out;
1791
1792 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1793 qdio->adapter->pool.erp_req);
1794
1795 if (IS_ERR(req)) {
1796 retval = PTR_ERR(req);
1797 goto out;
1798 }
1799
1800 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1801 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1802 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1803 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1804
1805 req->data = erp_action->port;
1806 req->qtcb->header.port_handle = erp_action->port->handle;
1807 req->erp_action = erp_action;
1808 req->handler = zfcp_fsf_close_physical_port_handler;
1809 erp_action->fsf_req = req;
1810
1811 zfcp_fsf_start_erp_timer(req);
1812 retval = zfcp_fsf_req_send(req);
1813 if (retval) {
1814 zfcp_fsf_req_free(req);
1815 erp_action->fsf_req = NULL;
1816 }
1817 out:
1818 spin_unlock_bh(&qdio->req_q_lock);
1819 return retval;
1820 }
1821
1822 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1823 {
1824 struct zfcp_adapter *adapter = req->adapter;
1825 struct zfcp_unit *unit = req->data;
1826 struct fsf_qtcb_header *header = &req->qtcb->header;
1827 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1828 struct fsf_queue_designator *queue_designator =
1829 &header->fsf_status_qual.fsf_queue_designator;
1830 int exclusive, readwrite;
1831
1832 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1833 return;
1834
1835 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1836 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1837 ZFCP_STATUS_UNIT_SHARED |
1838 ZFCP_STATUS_UNIT_READONLY,
1839 &unit->status);
1840
1841 switch (header->fsf_status) {
1842
1843 case FSF_PORT_HANDLE_NOT_VALID:
1844 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1845 /* fall through */
1846 case FSF_LUN_ALREADY_OPEN:
1847 break;
1848 case FSF_ACCESS_DENIED:
1849 zfcp_fsf_access_denied_unit(req, unit);
1850 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1851 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1852 break;
1853 case FSF_PORT_BOXED:
1854 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1855 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1856 ZFCP_STATUS_FSFREQ_RETRY;
1857 break;
1858 case FSF_LUN_SHARING_VIOLATION:
1859 if (header->fsf_status_qual.word[0])
1860 dev_warn(&adapter->ccw_device->dev,
1861 "LUN 0x%Lx on port 0x%Lx is already in "
1862 "use by CSS%d, MIF Image ID %x\n",
1863 (unsigned long long)unit->fcp_lun,
1864 (unsigned long long)unit->port->wwpn,
1865 queue_designator->cssid,
1866 queue_designator->hla);
1867 else
1868 zfcp_act_eval_err(adapter,
1869 header->fsf_status_qual.word[2]);
1870 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1871 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1872 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1874 break;
1875 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1876 dev_warn(&adapter->ccw_device->dev,
1877 "No handle is available for LUN "
1878 "0x%016Lx on port 0x%016Lx\n",
1879 (unsigned long long)unit->fcp_lun,
1880 (unsigned long long)unit->port->wwpn);
1881 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1882 /* fall through */
1883 case FSF_INVALID_COMMAND_OPTION:
1884 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1885 break;
1886 case FSF_ADAPTER_STATUS_AVAILABLE:
1887 switch (header->fsf_status_qual.word[0]) {
1888 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1889 zfcp_fc_test_link(unit->port);
1890 /* fall through */
1891 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1892 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1893 break;
1894 }
1895 break;
1896
1897 case FSF_GOOD:
1898 unit->handle = header->lun_handle;
1899 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1900
1901 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1902 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1903 !zfcp_ccw_priv_sch(adapter)) {
1904 exclusive = (bottom->lun_access_info &
1905 FSF_UNIT_ACCESS_EXCLUSIVE);
1906 readwrite = (bottom->lun_access_info &
1907 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1908
1909 if (!exclusive)
1910 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1911 &unit->status);
1912
1913 if (!readwrite) {
1914 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1915 &unit->status);
1916 dev_info(&adapter->ccw_device->dev,
1917 "SCSI device at LUN 0x%016Lx on port "
1918 "0x%016Lx opened read-only\n",
1919 (unsigned long long)unit->fcp_lun,
1920 (unsigned long long)unit->port->wwpn);
1921 }
1922
1923 if (exclusive && !readwrite) {
1924 dev_err(&adapter->ccw_device->dev,
1925 "Exclusive read-only access not "
1926 "supported (unit 0x%016Lx, "
1927 "port 0x%016Lx)\n",
1928 (unsigned long long)unit->fcp_lun,
1929 (unsigned long long)unit->port->wwpn);
1930 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1931 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1932 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1933 } else if (!exclusive && readwrite) {
1934 dev_err(&adapter->ccw_device->dev,
1935 "Shared read-write access not "
1936 "supported (unit 0x%016Lx, port "
1937 "0x%016Lx)\n",
1938 (unsigned long long)unit->fcp_lun,
1939 (unsigned long long)unit->port->wwpn);
1940 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1941 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1942 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1943 }
1944 }
1945 break;
1946 }
1947 }
1948
1949 /**
1950 * zfcp_fsf_open_unit - open unit
1951 * @erp_action: pointer to struct zfcp_erp_action
1952 * Returns: 0 on success, error otherwise
1953 */
1954 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1955 {
1956 struct qdio_buffer_element *sbale;
1957 struct zfcp_adapter *adapter = erp_action->adapter;
1958 struct zfcp_qdio *qdio = adapter->qdio;
1959 struct zfcp_fsf_req *req;
1960 int retval = -EIO;
1961
1962 spin_lock_bh(&qdio->req_q_lock);
1963 if (zfcp_fsf_req_sbal_get(qdio))
1964 goto out;
1965
1966 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1967 adapter->pool.erp_req);
1968
1969 if (IS_ERR(req)) {
1970 retval = PTR_ERR(req);
1971 goto out;
1972 }
1973
1974 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1975 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1976 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1977 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1978
1979 req->qtcb->header.port_handle = erp_action->port->handle;
1980 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1981 req->handler = zfcp_fsf_open_unit_handler;
1982 req->data = erp_action->unit;
1983 req->erp_action = erp_action;
1984 erp_action->fsf_req = req;
1985
1986 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1987 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1988
1989 zfcp_fsf_start_erp_timer(req);
1990 retval = zfcp_fsf_req_send(req);
1991 if (retval) {
1992 zfcp_fsf_req_free(req);
1993 erp_action->fsf_req = NULL;
1994 }
1995 out:
1996 spin_unlock_bh(&qdio->req_q_lock);
1997 return retval;
1998 }
1999
2000 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2001 {
2002 struct zfcp_unit *unit = req->data;
2003
2004 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2005 return;
2006
2007 switch (req->qtcb->header.fsf_status) {
2008 case FSF_PORT_HANDLE_NOT_VALID:
2009 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2010 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2011 break;
2012 case FSF_LUN_HANDLE_NOT_VALID:
2013 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2014 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2015 break;
2016 case FSF_PORT_BOXED:
2017 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2018 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2019 ZFCP_STATUS_FSFREQ_RETRY;
2020 break;
2021 case FSF_ADAPTER_STATUS_AVAILABLE:
2022 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2023 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2024 zfcp_fc_test_link(unit->port);
2025 /* fall through */
2026 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2027 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2028 break;
2029 }
2030 break;
2031 case FSF_GOOD:
2032 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2033 break;
2034 }
2035 }
2036
2037 /**
2038 * zfcp_fsf_close_unit - close zfcp unit
2039 * @erp_action: pointer to struct zfcp_unit
2040 * Returns: 0 on success, error otherwise
2041 */
2042 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2043 {
2044 struct qdio_buffer_element *sbale;
2045 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2046 struct zfcp_fsf_req *req;
2047 int retval = -EIO;
2048
2049 spin_lock_bh(&qdio->req_q_lock);
2050 if (zfcp_fsf_req_sbal_get(qdio))
2051 goto out;
2052
2053 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2054 qdio->adapter->pool.erp_req);
2055
2056 if (IS_ERR(req)) {
2057 retval = PTR_ERR(req);
2058 goto out;
2059 }
2060
2061 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2062 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2063 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2064 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2065
2066 req->qtcb->header.port_handle = erp_action->port->handle;
2067 req->qtcb->header.lun_handle = erp_action->unit->handle;
2068 req->handler = zfcp_fsf_close_unit_handler;
2069 req->data = erp_action->unit;
2070 req->erp_action = erp_action;
2071 erp_action->fsf_req = req;
2072
2073 zfcp_fsf_start_erp_timer(req);
2074 retval = zfcp_fsf_req_send(req);
2075 if (retval) {
2076 zfcp_fsf_req_free(req);
2077 erp_action->fsf_req = NULL;
2078 }
2079 out:
2080 spin_unlock_bh(&qdio->req_q_lock);
2081 return retval;
2082 }
2083
2084 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2085 {
2086 lat_rec->sum += lat;
2087 lat_rec->min = min(lat_rec->min, lat);
2088 lat_rec->max = max(lat_rec->max, lat);
2089 }
2090
2091 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2092 {
2093 struct fsf_qual_latency_info *lat_inf;
2094 struct latency_cont *lat;
2095 struct zfcp_unit *unit = req->unit;
2096
2097 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2098
2099 switch (req->qtcb->bottom.io.data_direction) {
2100 case FSF_DATADIR_READ:
2101 lat = &unit->latencies.read;
2102 break;
2103 case FSF_DATADIR_WRITE:
2104 lat = &unit->latencies.write;
2105 break;
2106 case FSF_DATADIR_CMND:
2107 lat = &unit->latencies.cmd;
2108 break;
2109 default:
2110 return;
2111 }
2112
2113 spin_lock(&unit->latencies.lock);
2114 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2115 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2116 lat->counter++;
2117 spin_unlock(&unit->latencies.lock);
2118 }
2119
2120 #ifdef CONFIG_BLK_DEV_IO_TRACE
2121 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2122 {
2123 struct fsf_qual_latency_info *lat_inf;
2124 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2125 struct request *req = scsi_cmnd->request;
2126 struct zfcp_blk_drv_data trace;
2127 int ticks = fsf_req->adapter->timer_ticks;
2128
2129 trace.flags = 0;
2130 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2131 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2132 trace.flags |= ZFCP_BLK_LAT_VALID;
2133 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2134 trace.channel_lat = lat_inf->channel_lat * ticks;
2135 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2136 }
2137 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2138 trace.flags |= ZFCP_BLK_REQ_ERROR;
2139 trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2140 trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
2141
2142 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2143 }
2144 #else
2145 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2146 {
2147 }
2148 #endif
2149
2150 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2151 {
2152 struct scsi_cmnd *scpnt;
2153 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2154 &(req->qtcb->bottom.io.fcp_rsp);
2155 u32 sns_len;
2156 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2157 unsigned long flags;
2158
2159 read_lock_irqsave(&req->adapter->abort_lock, flags);
2160
2161 scpnt = req->data;
2162 if (unlikely(!scpnt)) {
2163 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2164 return;
2165 }
2166
2167 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2168 set_host_byte(scpnt, DID_SOFT_ERROR);
2169 goto skip_fsfstatus;
2170 }
2171
2172 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2173 set_host_byte(scpnt, DID_ERROR);
2174 goto skip_fsfstatus;
2175 }
2176
2177 set_msg_byte(scpnt, COMMAND_COMPLETE);
2178
2179 scpnt->result |= fcp_rsp_iu->scsi_status;
2180
2181 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2182 zfcp_fsf_req_latency(req);
2183
2184 zfcp_fsf_trace_latency(req);
2185
2186 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2187 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2188 set_host_byte(scpnt, DID_OK);
2189 else {
2190 set_host_byte(scpnt, DID_ERROR);
2191 goto skip_fsfstatus;
2192 }
2193 }
2194
2195 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2196 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2197 fcp_rsp_iu->fcp_rsp_len;
2198 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2199 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2200
2201 memcpy(scpnt->sense_buffer,
2202 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2203 }
2204
2205 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2206 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2207 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2208 scpnt->underflow)
2209 set_host_byte(scpnt, DID_ERROR);
2210 }
2211 skip_fsfstatus:
2212 if (scpnt->result != 0)
2213 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2214 else if (scpnt->retries > 0)
2215 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2216 else
2217 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2218
2219 scpnt->host_scribble = NULL;
2220 (scpnt->scsi_done) (scpnt);
2221 /*
2222 * We must hold this lock until scsi_done has been called.
2223 * Otherwise we may call scsi_done after abort regarding this
2224 * command has completed.
2225 * Note: scsi_done must not block!
2226 */
2227 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2228 }
2229
2230 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2231 {
2232 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2233 &(req->qtcb->bottom.io.fcp_rsp);
2234 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2235
2236 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2237 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2238 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2239 }
2240
2241
2242 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2243 {
2244 struct zfcp_unit *unit;
2245 struct fsf_qtcb_header *header = &req->qtcb->header;
2246
2247 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2248 unit = req->data;
2249 else
2250 unit = req->unit;
2251
2252 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2253 goto skip_fsfstatus;
2254
2255 switch (header->fsf_status) {
2256 case FSF_HANDLE_MISMATCH:
2257 case FSF_PORT_HANDLE_NOT_VALID:
2258 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2259 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2260 break;
2261 case FSF_FCPLUN_NOT_VALID:
2262 case FSF_LUN_HANDLE_NOT_VALID:
2263 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2264 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2265 break;
2266 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2267 zfcp_fsf_class_not_supp(req);
2268 break;
2269 case FSF_ACCESS_DENIED:
2270 zfcp_fsf_access_denied_unit(req, unit);
2271 break;
2272 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2273 dev_err(&req->adapter->ccw_device->dev,
2274 "Incorrect direction %d, unit 0x%016Lx on port "
2275 "0x%016Lx closed\n",
2276 req->qtcb->bottom.io.data_direction,
2277 (unsigned long long)unit->fcp_lun,
2278 (unsigned long long)unit->port->wwpn);
2279 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2280 req);
2281 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2282 break;
2283 case FSF_CMND_LENGTH_NOT_VALID:
2284 dev_err(&req->adapter->ccw_device->dev,
2285 "Incorrect CDB length %d, unit 0x%016Lx on "
2286 "port 0x%016Lx closed\n",
2287 req->qtcb->bottom.io.fcp_cmnd_length,
2288 (unsigned long long)unit->fcp_lun,
2289 (unsigned long long)unit->port->wwpn);
2290 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2291 req);
2292 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2293 break;
2294 case FSF_PORT_BOXED:
2295 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2296 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2297 ZFCP_STATUS_FSFREQ_RETRY;
2298 break;
2299 case FSF_LUN_BOXED:
2300 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2301 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2302 ZFCP_STATUS_FSFREQ_RETRY;
2303 break;
2304 case FSF_ADAPTER_STATUS_AVAILABLE:
2305 if (header->fsf_status_qual.word[0] ==
2306 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2307 zfcp_fc_test_link(unit->port);
2308 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2309 break;
2310 }
2311 skip_fsfstatus:
2312 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2313 zfcp_fsf_send_fcp_ctm_handler(req);
2314 else {
2315 zfcp_fsf_send_fcp_command_task_handler(req);
2316 req->unit = NULL;
2317 zfcp_unit_put(unit);
2318 }
2319 }
2320
2321 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2322 {
2323 u32 *fcp_dl_ptr;
2324
2325 /*
2326 * fcp_dl_addr = start address of fcp_cmnd structure +
2327 * size of fixed part + size of dynamically sized add_dcp_cdb field
2328 * SEE FCP-2 documentation
2329 */
2330 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2331 (fcp_cmd->add_fcp_cdb_length << 2));
2332 *fcp_dl_ptr = fcp_dl;
2333 }
2334
2335 /**
2336 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2337 * @unit: unit where command is sent to
2338 * @scsi_cmnd: scsi command to be sent
2339 */
2340 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2341 struct scsi_cmnd *scsi_cmnd)
2342 {
2343 struct zfcp_fsf_req *req;
2344 struct fcp_cmnd_iu *fcp_cmnd_iu;
2345 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2346 int real_bytes, retval = -EIO;
2347 struct zfcp_adapter *adapter = unit->port->adapter;
2348 struct zfcp_qdio *qdio = adapter->qdio;
2349
2350 if (unlikely(!(atomic_read(&unit->status) &
2351 ZFCP_STATUS_COMMON_UNBLOCKED)))
2352 return -EBUSY;
2353
2354 spin_lock(&qdio->req_q_lock);
2355 if (atomic_read(&qdio->req_q.count) <= 0) {
2356 atomic_inc(&qdio->req_q_full);
2357 goto out;
2358 }
2359
2360 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2361 adapter->pool.scsi_req);
2362
2363 if (IS_ERR(req)) {
2364 retval = PTR_ERR(req);
2365 goto out;
2366 }
2367
2368 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2369 zfcp_unit_get(unit);
2370 req->unit = unit;
2371 req->data = scsi_cmnd;
2372 req->handler = zfcp_fsf_send_fcp_command_handler;
2373 req->qtcb->header.lun_handle = unit->handle;
2374 req->qtcb->header.port_handle = unit->port->handle;
2375 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2376
2377 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2378
2379 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2380 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2381 /*
2382 * set depending on data direction:
2383 * data direction bits in SBALE (SB Type)
2384 * data direction bits in QTCB
2385 * data direction bits in FCP_CMND IU
2386 */
2387 switch (scsi_cmnd->sc_data_direction) {
2388 case DMA_NONE:
2389 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2390 break;
2391 case DMA_FROM_DEVICE:
2392 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2393 fcp_cmnd_iu->rddata = 1;
2394 break;
2395 case DMA_TO_DEVICE:
2396 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2397 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2398 fcp_cmnd_iu->wddata = 1;
2399 break;
2400 case DMA_BIDIRECTIONAL:
2401 goto failed_scsi_cmnd;
2402 }
2403
2404 if (likely((scsi_cmnd->device->simple_tags) ||
2405 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2406 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2407 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2408 else
2409 fcp_cmnd_iu->task_attribute = UNTAGGED;
2410
2411 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2412 fcp_cmnd_iu->add_fcp_cdb_length =
2413 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2414
2415 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2416
2417 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2418 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2419
2420 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2421 scsi_sglist(scsi_cmnd),
2422 FSF_MAX_SBALS_PER_REQ);
2423 if (unlikely(real_bytes < 0)) {
2424 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2425 dev_err(&adapter->ccw_device->dev,
2426 "Oversize data package, unit 0x%016Lx "
2427 "on port 0x%016Lx closed\n",
2428 (unsigned long long)unit->fcp_lun,
2429 (unsigned long long)unit->port->wwpn);
2430 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2431 retval = -EINVAL;
2432 }
2433 goto failed_scsi_cmnd;
2434 }
2435
2436 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2437
2438 retval = zfcp_fsf_req_send(req);
2439 if (unlikely(retval))
2440 goto failed_scsi_cmnd;
2441
2442 goto out;
2443
2444 failed_scsi_cmnd:
2445 zfcp_unit_put(unit);
2446 zfcp_fsf_req_free(req);
2447 scsi_cmnd->host_scribble = NULL;
2448 out:
2449 spin_unlock(&qdio->req_q_lock);
2450 return retval;
2451 }
2452
2453 /**
2454 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2455 * @unit: pointer to struct zfcp_unit
2456 * @tm_flags: unsigned byte for task management flags
2457 * Returns: on success pointer to struct fsf_req, NULL otherwise
2458 */
2459 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2460 {
2461 struct qdio_buffer_element *sbale;
2462 struct zfcp_fsf_req *req = NULL;
2463 struct fcp_cmnd_iu *fcp_cmnd_iu;
2464 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2465
2466 if (unlikely(!(atomic_read(&unit->status) &
2467 ZFCP_STATUS_COMMON_UNBLOCKED)))
2468 return NULL;
2469
2470 spin_lock_bh(&qdio->req_q_lock);
2471 if (zfcp_fsf_req_sbal_get(qdio))
2472 goto out;
2473
2474 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2475 qdio->adapter->pool.scsi_req);
2476
2477 if (IS_ERR(req)) {
2478 req = NULL;
2479 goto out;
2480 }
2481
2482 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2483 req->data = unit;
2484 req->handler = zfcp_fsf_send_fcp_command_handler;
2485 req->qtcb->header.lun_handle = unit->handle;
2486 req->qtcb->header.port_handle = unit->port->handle;
2487 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2488 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2489 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2490 sizeof(u32);
2491
2492 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2493 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2494 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2495
2496 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2497 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2498 fcp_cmnd_iu->task_management_flags = tm_flags;
2499
2500 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2501 if (!zfcp_fsf_req_send(req))
2502 goto out;
2503
2504 zfcp_fsf_req_free(req);
2505 req = NULL;
2506 out:
2507 spin_unlock_bh(&qdio->req_q_lock);
2508 return req;
2509 }
2510
2511 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2512 {
2513 }
2514
2515 /**
2516 * zfcp_fsf_control_file - control file upload/download
2517 * @adapter: pointer to struct zfcp_adapter
2518 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2519 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2520 */
2521 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2522 struct zfcp_fsf_cfdc *fsf_cfdc)
2523 {
2524 struct qdio_buffer_element *sbale;
2525 struct zfcp_qdio *qdio = adapter->qdio;
2526 struct zfcp_fsf_req *req = NULL;
2527 struct fsf_qtcb_bottom_support *bottom;
2528 int direction, retval = -EIO, bytes;
2529
2530 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2531 return ERR_PTR(-EOPNOTSUPP);
2532
2533 switch (fsf_cfdc->command) {
2534 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2535 direction = SBAL_FLAGS0_TYPE_WRITE;
2536 break;
2537 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2538 direction = SBAL_FLAGS0_TYPE_READ;
2539 break;
2540 default:
2541 return ERR_PTR(-EINVAL);
2542 }
2543
2544 spin_lock_bh(&qdio->req_q_lock);
2545 if (zfcp_fsf_req_sbal_get(qdio))
2546 goto out;
2547
2548 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2549 if (IS_ERR(req)) {
2550 retval = -EPERM;
2551 goto out;
2552 }
2553
2554 req->handler = zfcp_fsf_control_file_handler;
2555
2556 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2557 sbale[0].flags |= direction;
2558
2559 bottom = &req->qtcb->bottom.support;
2560 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2561 bottom->option = fsf_cfdc->option;
2562
2563 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2564 direction, fsf_cfdc->sg,
2565 FSF_MAX_SBALS_PER_REQ);
2566 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2567 zfcp_fsf_req_free(req);
2568 goto out;
2569 }
2570
2571 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2572 retval = zfcp_fsf_req_send(req);
2573 out:
2574 spin_unlock_bh(&qdio->req_q_lock);
2575
2576 if (!retval) {
2577 wait_for_completion(&req->completion);
2578 return req;
2579 }
2580 return ERR_PTR(retval);
2581 }
2582
2583 /**
2584 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2585 * @adapter: pointer to struct zfcp_adapter
2586 * @sbal_idx: response queue index of SBAL to be processed
2587 */
2588 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2589 {
2590 struct zfcp_adapter *adapter = qdio->adapter;
2591 struct qdio_buffer *sbal = qdio->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->queue_req.sbal_response = sbal_idx;
2616 fsf_req->queue_req.qdio_inb_usage =
2617 atomic_read(&qdio->resp_q.count);
2618 zfcp_fsf_req_complete(fsf_req);
2619
2620 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2621 break;
2622 }
2623 }
Linux with added FPC-III support