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[linux-rt-nao.git] / drivers / s390 / scsi / zfcp_fsf.c
blobe6416f8541b0274e0692b84f60e3f3b26f093b83
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2008
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
15 static void zfcp_fsf_request_timeout_handler(unsigned long data)
16 {
17 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
18 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
19 NULL);
20 }
21
22 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
23 unsigned long timeout)
24 {
25 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
26 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
27 fsf_req->timer.expires = jiffies + timeout;
28 add_timer(&fsf_req->timer);
29 }
30
31 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
32 {
33 BUG_ON(!fsf_req->erp_action);
34 fsf_req->timer.function = zfcp_erp_timeout_handler;
35 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
36 fsf_req->timer.expires = jiffies + 30 * HZ;
37 add_timer(&fsf_req->timer);
38 }
39
40 /* association between FSF command and FSF QTCB type */
41 static u32 fsf_qtcb_type[] = {
42 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
43 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
52 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
53 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
55 };
56
57 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
58 {
59 u16 subtable = table >> 16;
60 u16 rule = table & 0xffff;
61 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
62
63 if (subtable && subtable < ARRAY_SIZE(act_type))
64 dev_warn(&adapter->ccw_device->dev,
65 "Access denied according to ACT rule type %s, "
66 "rule %d\n", act_type[subtable], rule);
67 }
68
69 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
70 struct zfcp_port *port)
71 {
72 struct fsf_qtcb_header *header = &req->qtcb->header;
73 dev_warn(&req->adapter->ccw_device->dev,
74 "Access denied to port 0x%016Lx\n",
75 (unsigned long long)port->wwpn);
76 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
77 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
78 zfcp_erp_port_access_denied(port, 55, req);
79 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
80 }
81
82 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
83 struct zfcp_unit *unit)
84 {
85 struct fsf_qtcb_header *header = &req->qtcb->header;
86 dev_warn(&req->adapter->ccw_device->dev,
87 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
88 (unsigned long long)unit->fcp_lun,
89 (unsigned long long)unit->port->wwpn);
90 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
91 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
92 zfcp_erp_unit_access_denied(unit, 59, req);
93 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
94 }
95
96 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
97 {
98 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
99 "operational because of an unsupported FC class\n");
100 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
101 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
102 }
103
104 /**
105 * zfcp_fsf_req_free - free memory used by fsf request
106 * @fsf_req: pointer to struct zfcp_fsf_req
107 */
108 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
109 {
110 if (likely(req->pool)) {
111 mempool_free(req, req->pool);
112 return;
113 }
114
115 if (req->qtcb) {
116 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
117 return;
118 }
119 }
120
121 /**
122 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
123 * @adapter: pointer to struct zfcp_adapter
124 *
125 * Never ever call this without shutting down the adapter first.
126 * Otherwise the adapter would continue using and corrupting s390 storage.
127 * Included BUG_ON() call to ensure this is done.
128 * ERP is supposed to be the only user of this function.
129 */
130 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
131 {
132 struct zfcp_fsf_req *req, *tmp;
133 unsigned long flags;
134 LIST_HEAD(remove_queue);
135 unsigned int i;
136
137 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
138 spin_lock_irqsave(&adapter->req_list_lock, flags);
139 for (i = 0; i < REQUEST_LIST_SIZE; i++)
140 list_splice_init(&adapter->req_list[i], &remove_queue);
141 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
142
143 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
144 list_del(&req->list);
145 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
146 zfcp_fsf_req_complete(req);
147 }
148 }
149
150 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
151 {
152 struct fsf_status_read_buffer *sr_buf = req->data;
153 struct zfcp_adapter *adapter = req->adapter;
154 struct zfcp_port *port;
155 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
156 unsigned long flags;
157
158 read_lock_irqsave(&zfcp_data.config_lock, flags);
159 list_for_each_entry(port, &adapter->port_list_head, list)
160 if (port->d_id == d_id) {
161 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
162 switch (sr_buf->status_subtype) {
163 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
164 zfcp_erp_port_reopen(port, 0, 101, req);
165 break;
166 case FSF_STATUS_READ_SUB_ERROR_PORT:
167 zfcp_erp_port_shutdown(port, 0, 122, req);
168 break;
169 }
170 return;
171 }
172 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
173 }
174
175 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
176 struct fsf_link_down_info *link_down)
177 {
178 struct zfcp_adapter *adapter = req->adapter;
179
180 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
181 return;
182
183 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
184
185 if (!link_down)
186 goto out;
187
188 switch (link_down->error_code) {
189 case FSF_PSQ_LINK_NO_LIGHT:
190 dev_warn(&req->adapter->ccw_device->dev,
191 "There is no light signal from the local "
192 "fibre channel cable\n");
193 break;
194 case FSF_PSQ_LINK_WRAP_PLUG:
195 dev_warn(&req->adapter->ccw_device->dev,
196 "There is a wrap plug instead of a fibre "
197 "channel cable\n");
198 break;
199 case FSF_PSQ_LINK_NO_FCP:
200 dev_warn(&req->adapter->ccw_device->dev,
201 "The adjacent fibre channel node does not "
202 "support FCP\n");
203 break;
204 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
205 dev_warn(&req->adapter->ccw_device->dev,
206 "The FCP device is suspended because of a "
207 "firmware update\n");
208 break;
209 case FSF_PSQ_LINK_INVALID_WWPN:
210 dev_warn(&req->adapter->ccw_device->dev,
211 "The FCP device detected a WWPN that is "
212 "duplicate or not valid\n");
213 break;
214 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
215 dev_warn(&req->adapter->ccw_device->dev,
216 "The fibre channel fabric does not support NPIV\n");
217 break;
218 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
219 dev_warn(&req->adapter->ccw_device->dev,
220 "The FCP adapter cannot support more NPIV ports\n");
221 break;
222 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
223 dev_warn(&req->adapter->ccw_device->dev,
224 "The adjacent switch cannot support "
225 "more NPIV ports\n");
226 break;
227 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
228 dev_warn(&req->adapter->ccw_device->dev,
229 "The FCP adapter could not log in to the "
230 "fibre channel fabric\n");
231 break;
232 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
233 dev_warn(&req->adapter->ccw_device->dev,
234 "The WWPN assignment file on the FCP adapter "
235 "has been damaged\n");
236 break;
237 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
238 dev_warn(&req->adapter->ccw_device->dev,
239 "The mode table on the FCP adapter "
240 "has been damaged\n");
241 break;
242 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
243 dev_warn(&req->adapter->ccw_device->dev,
244 "All NPIV ports on the FCP adapter have "
245 "been assigned\n");
246 break;
247 default:
248 dev_warn(&req->adapter->ccw_device->dev,
249 "The link between the FCP adapter and "
250 "the FC fabric is down\n");
251 }
252 out:
253 zfcp_erp_adapter_failed(adapter, id, req);
254 }
255
256 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
257 {
258 struct fsf_status_read_buffer *sr_buf = req->data;
259 struct fsf_link_down_info *ldi =
260 (struct fsf_link_down_info *) &sr_buf->payload;
261
262 switch (sr_buf->status_subtype) {
263 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
264 zfcp_fsf_link_down_info_eval(req, 38, ldi);
265 break;
266 case FSF_STATUS_READ_SUB_FDISC_FAILED:
267 zfcp_fsf_link_down_info_eval(req, 39, ldi);
268 break;
269 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
270 zfcp_fsf_link_down_info_eval(req, 40, NULL);
271 };
272 }
273
274 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
275 {
276 struct zfcp_adapter *adapter = req->adapter;
277 struct fsf_status_read_buffer *sr_buf = req->data;
278
279 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
280 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
281 mempool_free(sr_buf, adapter->pool.data_status_read);
282 zfcp_fsf_req_free(req);
283 return;
284 }
285
286 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
287
288 switch (sr_buf->status_type) {
289 case FSF_STATUS_READ_PORT_CLOSED:
290 zfcp_fsf_status_read_port_closed(req);
291 break;
292 case FSF_STATUS_READ_INCOMING_ELS:
293 zfcp_fc_incoming_els(req);
294 break;
295 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
296 break;
297 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
298 dev_warn(&adapter->ccw_device->dev,
299 "The error threshold for checksum statistics "
300 "has been exceeded\n");
301 zfcp_hba_dbf_event_berr(adapter, req);
302 break;
303 case FSF_STATUS_READ_LINK_DOWN:
304 zfcp_fsf_status_read_link_down(req);
305 break;
306 case FSF_STATUS_READ_LINK_UP:
307 dev_info(&adapter->ccw_device->dev,
308 "The local link has been restored\n");
309 /* All ports should be marked as ready to run again */
310 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
311 ZFCP_STATUS_COMMON_RUNNING,
312 ZFCP_SET);
313 zfcp_erp_adapter_reopen(adapter,
314 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
315 ZFCP_STATUS_COMMON_ERP_FAILED,
316 102, req);
317 break;
318 case FSF_STATUS_READ_NOTIFICATION_LOST:
319 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
320 zfcp_erp_adapter_access_changed(adapter, 135, req);
321 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
322 schedule_work(&adapter->scan_work);
323 break;
324 case FSF_STATUS_READ_CFDC_UPDATED:
325 zfcp_erp_adapter_access_changed(adapter, 136, req);
326 break;
327 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
328 adapter->adapter_features = sr_buf->payload.word[0];
329 break;
330 }
331
332 mempool_free(sr_buf, adapter->pool.data_status_read);
333 zfcp_fsf_req_free(req);
334
335 atomic_inc(&adapter->stat_miss);
336 queue_work(zfcp_data.work_queue, &adapter->stat_work);
337 }
338
339 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
340 {
341 switch (req->qtcb->header.fsf_status_qual.word[0]) {
342 case FSF_SQ_FCP_RSP_AVAILABLE:
343 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
344 case FSF_SQ_NO_RETRY_POSSIBLE:
345 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
346 return;
347 case FSF_SQ_COMMAND_ABORTED:
348 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
349 break;
350 case FSF_SQ_NO_RECOM:
351 dev_err(&req->adapter->ccw_device->dev,
352 "The FCP adapter reported a problem "
353 "that cannot be recovered\n");
354 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
355 break;
356 }
357 /* all non-return stats set FSFREQ_ERROR*/
358 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
359 }
360
361 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
362 {
363 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
364 return;
365
366 switch (req->qtcb->header.fsf_status) {
367 case FSF_UNKNOWN_COMMAND:
368 dev_err(&req->adapter->ccw_device->dev,
369 "The FCP adapter does not recognize the command 0x%x\n",
370 req->qtcb->header.fsf_command);
371 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
372 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
373 break;
374 case FSF_ADAPTER_STATUS_AVAILABLE:
375 zfcp_fsf_fsfstatus_qual_eval(req);
376 break;
377 }
378 }
379
380 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
381 {
382 struct zfcp_adapter *adapter = req->adapter;
383 struct fsf_qtcb *qtcb = req->qtcb;
384 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
385
386 zfcp_hba_dbf_event_fsf_response(req);
387
388 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
389 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
390 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
391 return;
392 }
393
394 switch (qtcb->prefix.prot_status) {
395 case FSF_PROT_GOOD:
396 case FSF_PROT_FSF_STATUS_PRESENTED:
397 return;
398 case FSF_PROT_QTCB_VERSION_ERROR:
399 dev_err(&adapter->ccw_device->dev,
400 "QTCB version 0x%x not supported by FCP adapter "
401 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
402 psq->word[0], psq->word[1]);
403 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
404 break;
405 case FSF_PROT_ERROR_STATE:
406 case FSF_PROT_SEQ_NUMB_ERROR:
407 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
408 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
409 break;
410 case FSF_PROT_UNSUPP_QTCB_TYPE:
411 dev_err(&adapter->ccw_device->dev,
412 "The QTCB type is not supported by the FCP adapter\n");
413 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
414 break;
415 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
416 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
417 &adapter->status);
418 break;
419 case FSF_PROT_DUPLICATE_REQUEST_ID:
420 dev_err(&adapter->ccw_device->dev,
421 "0x%Lx is an ambiguous request identifier\n",
422 (unsigned long long)qtcb->bottom.support.req_handle);
423 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
424 break;
425 case FSF_PROT_LINK_DOWN:
426 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
427 /* FIXME: reopening adapter now? better wait for link up */
428 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
429 break;
430 case FSF_PROT_REEST_QUEUE:
431 /* All ports should be marked as ready to run again */
432 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
433 ZFCP_STATUS_COMMON_RUNNING,
434 ZFCP_SET);
435 zfcp_erp_adapter_reopen(adapter,
436 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
437 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
438 break;
439 default:
440 dev_err(&adapter->ccw_device->dev,
441 "0x%x is not a valid transfer protocol status\n",
442 qtcb->prefix.prot_status);
443 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
444 }
445 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
446 }
447
448 /**
449 * zfcp_fsf_req_complete - process completion of a FSF request
450 * @fsf_req: The FSF request that has been completed.
451 *
452 * When a request has been completed either from the FCP adapter,
453 * or it has been dismissed due to a queue shutdown, this function
454 * is called to process the completion status and trigger further
455 * events related to the FSF request.
456 */
457 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
458 {
459 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
460 zfcp_fsf_status_read_handler(req);
461 return;
462 }
463
464 del_timer(&req->timer);
465 zfcp_fsf_protstatus_eval(req);
466 zfcp_fsf_fsfstatus_eval(req);
467 req->handler(req);
468
469 if (req->erp_action)
470 zfcp_erp_notify(req->erp_action, 0);
471 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
472
473 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
474 zfcp_fsf_req_free(req);
475 else
476 /* notify initiator waiting for the requests completion */
477 /*
478 * FIXME: Race! We must not access fsf_req here as it might have been
479 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
480 * flag. It's an improbable case. But, we have the same paranoia for
481 * the cleanup flag already.
482 * Might better be handled using complete()?
483 * (setting the flag and doing wakeup ought to be atomic
484 * with regard to checking the flag as long as waitqueue is
485 * part of the to be released structure)
486 */
487 wake_up(&req->completion_wq);
488 }
489
490 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
491 {
492 struct fsf_qtcb_bottom_config *bottom;
493 struct zfcp_adapter *adapter = req->adapter;
494 struct Scsi_Host *shost = adapter->scsi_host;
495
496 bottom = &req->qtcb->bottom.config;
497
498 if (req->data)
499 memcpy(req->data, bottom, sizeof(*bottom));
500
501 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
502 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
503 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
504 fc_host_speed(shost) = bottom->fc_link_speed;
505 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
506
507 adapter->hydra_version = bottom->adapter_type;
508 adapter->timer_ticks = bottom->timer_interval;
509
510 if (fc_host_permanent_port_name(shost) == -1)
511 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
512
513 switch (bottom->fc_topology) {
514 case FSF_TOPO_P2P:
515 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
516 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
517 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
518 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
519 break;
520 case FSF_TOPO_FABRIC:
521 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
522 break;
523 case FSF_TOPO_AL:
524 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
525 default:
526 dev_err(&adapter->ccw_device->dev,
527 "Unknown or unsupported arbitrated loop "
528 "fibre channel topology detected\n");
529 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
530 return -EIO;
531 }
532
533 return 0;
534 }
535
536 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
537 {
538 struct zfcp_adapter *adapter = req->adapter;
539 struct fsf_qtcb *qtcb = req->qtcb;
540 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
541 struct Scsi_Host *shost = adapter->scsi_host;
542
543 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
544 return;
545
546 adapter->fsf_lic_version = bottom->lic_version;
547 adapter->adapter_features = bottom->adapter_features;
548 adapter->connection_features = bottom->connection_features;
549 adapter->peer_wwpn = 0;
550 adapter->peer_wwnn = 0;
551 adapter->peer_d_id = 0;
552
553 switch (qtcb->header.fsf_status) {
554 case FSF_GOOD:
555 if (zfcp_fsf_exchange_config_evaluate(req))
556 return;
557
558 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
559 dev_err(&adapter->ccw_device->dev,
560 "FCP adapter maximum QTCB size (%d bytes) "
561 "is too small\n",
562 bottom->max_qtcb_size);
563 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
564 return;
565 }
566 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
567 &adapter->status);
568 break;
569 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
570 fc_host_node_name(shost) = 0;
571 fc_host_port_name(shost) = 0;
572 fc_host_port_id(shost) = 0;
573 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
574 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
575 adapter->hydra_version = 0;
576
577 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
578 &adapter->status);
579
580 zfcp_fsf_link_down_info_eval(req, 42,
581 &qtcb->header.fsf_status_qual.link_down_info);
582 break;
583 default:
584 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
585 return;
586 }
587
588 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
589 adapter->hardware_version = bottom->hardware_version;
590 memcpy(fc_host_serial_number(shost), bottom->serial_number,
591 min(FC_SERIAL_NUMBER_SIZE, 17));
592 EBCASC(fc_host_serial_number(shost),
593 min(FC_SERIAL_NUMBER_SIZE, 17));
594 }
595
596 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
597 dev_err(&adapter->ccw_device->dev,
598 "The FCP adapter only supports newer "
599 "control block versions\n");
600 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
601 return;
602 }
603 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
604 dev_err(&adapter->ccw_device->dev,
605 "The FCP adapter only supports older "
606 "control block versions\n");
607 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
608 }
609 }
610
611 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
612 {
613 struct zfcp_adapter *adapter = req->adapter;
614 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
615 struct Scsi_Host *shost = adapter->scsi_host;
616
617 if (req->data)
618 memcpy(req->data, bottom, sizeof(*bottom));
619
620 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
621 fc_host_permanent_port_name(shost) = bottom->wwpn;
622 else
623 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
624 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
625 fc_host_supported_speeds(shost) = bottom->supported_speed;
626 }
627
628 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
629 {
630 struct fsf_qtcb *qtcb = req->qtcb;
631
632 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
633 return;
634
635 switch (qtcb->header.fsf_status) {
636 case FSF_GOOD:
637 zfcp_fsf_exchange_port_evaluate(req);
638 break;
639 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
640 zfcp_fsf_exchange_port_evaluate(req);
641 zfcp_fsf_link_down_info_eval(req, 43,
642 &qtcb->header.fsf_status_qual.link_down_info);
643 break;
644 }
645 }
646
647 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
648 {
649 if (atomic_read(&adapter->req_q.count) > 0)
650 return 1;
651 atomic_inc(&adapter->qdio_outb_full);
652 return 0;
653 }
654
655 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
656 __releases(&adapter->req_q_lock)
657 __acquires(&adapter->req_q_lock)
658 {
659 struct zfcp_qdio_queue *req_q = &adapter->req_q;
660 long ret;
661
662 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
663 return -EIO;
664 if (atomic_read(&req_q->count) > 0)
665 return 0;
666
667 atomic_dec(&req_q->count);
668 spin_unlock_bh(&adapter->req_q_lock);
669 ret = wait_event_interruptible_timeout(adapter->request_wq,
670 atomic_read(&req_q->count) >= 0,
671 5 * HZ);
672 spin_lock_bh(&adapter->req_q_lock);
673 atomic_inc(&req_q->count);
674
675 if (ret > 0)
676 return 0;
677 if (!ret)
678 atomic_inc(&adapter->qdio_outb_full);
679 return -EIO;
680 }
681
682 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
683 {
684 struct zfcp_fsf_req *req;
685 req = mempool_alloc(pool, GFP_ATOMIC);
686 if (!req)
687 return NULL;
688 memset(req, 0, sizeof(*req));
689 req->pool = pool;
690 return req;
691 }
692
693 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
694 {
695 struct zfcp_fsf_req_qtcb *qtcb;
696
697 if (likely(pool))
698 qtcb = mempool_alloc(pool, GFP_ATOMIC);
699 else
700 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
701 GFP_ATOMIC);
702 if (unlikely(!qtcb))
703 return NULL;
704
705 memset(qtcb, 0, sizeof(*qtcb));
706 qtcb->fsf_req.qtcb = &qtcb->qtcb;
707 qtcb->fsf_req.pool = pool;
708
709 return &qtcb->fsf_req;
710 }
711
712 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
713 u32 fsf_cmd, int req_flags,
714 mempool_t *pool)
715 {
716 struct qdio_buffer_element *sbale;
717
718 struct zfcp_fsf_req *req;
719 struct zfcp_qdio_queue *req_q = &adapter->req_q;
720
721 if (req_flags & ZFCP_REQ_NO_QTCB)
722 req = zfcp_fsf_alloc_noqtcb(pool);
723 else
724 req = zfcp_fsf_alloc_qtcb(pool);
725
726 if (unlikely(!req))
727 return ERR_PTR(-EIO);
728
729 if (adapter->req_no == 0)
730 adapter->req_no++;
731
732 INIT_LIST_HEAD(&req->list);
733 init_timer(&req->timer);
734 init_waitqueue_head(&req->completion_wq);
735
736 req->adapter = adapter;
737 req->fsf_command = fsf_cmd;
738 req->req_id = adapter->req_no++;
739 req->sbal_number = 1;
740 req->sbal_first = req_q->first;
741 req->sbal_last = req_q->first;
742 req->sbale_curr = 1;
743
744 sbale = zfcp_qdio_sbale_req(req);
745 sbale[0].addr = (void *) req->req_id;
746 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
747
748 if (likely(req->qtcb)) {
749 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_id = req->req_id;
751 req->qtcb->prefix.ulp_info = 26;
752 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
753 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
754 req->qtcb->header.req_handle = req->req_id;
755 req->qtcb->header.fsf_command = req->fsf_command;
756 req->seq_no = adapter->fsf_req_seq_no;
757 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
758 sbale[1].addr = (void *) req->qtcb;
759 sbale[1].length = sizeof(struct fsf_qtcb);
760 }
761
762 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
763 zfcp_fsf_req_free(req);
764 return ERR_PTR(-EIO);
765 }
766
767 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
768 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
769
770 return req;
771 }
772
773 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
774 {
775 struct zfcp_adapter *adapter = req->adapter;
776 unsigned long flags;
777 int idx;
778
779 /* put allocated FSF request into hash table */
780 spin_lock_irqsave(&adapter->req_list_lock, flags);
781 idx = zfcp_reqlist_hash(req->req_id);
782 list_add_tail(&req->list, &adapter->req_list[idx]);
783 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
784
785 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
786 req->issued = get_clock();
787 if (zfcp_qdio_send(req)) {
788 del_timer(&req->timer);
789 spin_lock_irqsave(&adapter->req_list_lock, flags);
790 /* lookup request again, list might have changed */
791 if (zfcp_reqlist_find_safe(adapter, req))
792 zfcp_reqlist_remove(adapter, req);
793 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
794 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
795 return -EIO;
796 }
797
798 /* Don't increase for unsolicited status */
799 if (req->qtcb)
800 adapter->fsf_req_seq_no++;
801
802 return 0;
803 }
804
805 /**
806 * zfcp_fsf_status_read - send status read request
807 * @adapter: pointer to struct zfcp_adapter
808 * @req_flags: request flags
809 * Returns: 0 on success, ERROR otherwise
810 */
811 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
812 {
813 struct zfcp_fsf_req *req;
814 struct fsf_status_read_buffer *sr_buf;
815 struct qdio_buffer_element *sbale;
816 int retval = -EIO;
817
818 spin_lock_bh(&adapter->req_q_lock);
819 if (zfcp_fsf_req_sbal_get(adapter))
820 goto out;
821
822 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
823 ZFCP_REQ_NO_QTCB,
824 adapter->pool.fsf_req_status_read);
825 if (IS_ERR(req)) {
826 retval = PTR_ERR(req);
827 goto out;
828 }
829
830 sbale = zfcp_qdio_sbale_req(req);
831 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
832 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
833 req->sbale_curr = 2;
834
835 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
836 if (!sr_buf) {
837 retval = -ENOMEM;
838 goto failed_buf;
839 }
840 memset(sr_buf, 0, sizeof(*sr_buf));
841 req->data = sr_buf;
842 sbale = zfcp_qdio_sbale_curr(req);
843 sbale->addr = (void *) sr_buf;
844 sbale->length = sizeof(*sr_buf);
845
846 retval = zfcp_fsf_req_send(req);
847 if (retval)
848 goto failed_req_send;
849
850 goto out;
851
852 failed_req_send:
853 mempool_free(sr_buf, adapter->pool.data_status_read);
854 failed_buf:
855 zfcp_fsf_req_free(req);
856 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
857 out:
858 spin_unlock_bh(&adapter->req_q_lock);
859 return retval;
860 }
861
862 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
863 {
864 struct zfcp_unit *unit = req->data;
865 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
866
867 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
868 return;
869
870 switch (req->qtcb->header.fsf_status) {
871 case FSF_PORT_HANDLE_NOT_VALID:
872 if (fsq->word[0] == fsq->word[1]) {
873 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
874 req);
875 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
876 }
877 break;
878 case FSF_LUN_HANDLE_NOT_VALID:
879 if (fsq->word[0] == fsq->word[1]) {
880 zfcp_erp_port_reopen(unit->port, 0, 105, req);
881 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
882 }
883 break;
884 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
885 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
886 break;
887 case FSF_PORT_BOXED:
888 zfcp_erp_port_boxed(unit->port, 47, req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_LUN_BOXED:
893 zfcp_erp_unit_boxed(unit, 48, req);
894 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
895 ZFCP_STATUS_FSFREQ_RETRY;
896 break;
897 case FSF_ADAPTER_STATUS_AVAILABLE:
898 switch (fsq->word[0]) {
899 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
900 zfcp_test_link(unit->port);
901 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
902 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
903 break;
904 }
905 break;
906 case FSF_GOOD:
907 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
908 break;
909 }
910 }
911
912 /**
913 * zfcp_fsf_abort_fcp_command - abort running SCSI command
914 * @old_req_id: unsigned long
915 * @adapter: pointer to struct zfcp_adapter
916 * @unit: pointer to struct zfcp_unit
917 * @req_flags: integer specifying the request flags
918 * Returns: pointer to struct zfcp_fsf_req
919 *
920 * FIXME(design): should be watched by a timeout !!!
921 */
922
923 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
924 struct zfcp_adapter *adapter,
925 struct zfcp_unit *unit,
926 int req_flags)
927 {
928 struct qdio_buffer_element *sbale;
929 struct zfcp_fsf_req *req = NULL;
930
931 spin_lock(&adapter->req_q_lock);
932 if (!zfcp_fsf_sbal_available(adapter))
933 goto out;
934 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
935 req_flags, adapter->pool.fsf_req_abort);
936 if (IS_ERR(req)) {
937 req = NULL;
938 goto out;
939 }
940
941 if (unlikely(!(atomic_read(&unit->status) &
942 ZFCP_STATUS_COMMON_UNBLOCKED)))
943 goto out_error_free;
944
945 sbale = zfcp_qdio_sbale_req(req);
946 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
947 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
948
949 req->data = unit;
950 req->handler = zfcp_fsf_abort_fcp_command_handler;
951 req->qtcb->header.lun_handle = unit->handle;
952 req->qtcb->header.port_handle = unit->port->handle;
953 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
954
955 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
956 if (!zfcp_fsf_req_send(req))
957 goto out;
958
959 out_error_free:
960 zfcp_fsf_req_free(req);
961 req = NULL;
962 out:
963 spin_unlock(&adapter->req_q_lock);
964 return req;
965 }
966
967 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
968 {
969 struct zfcp_adapter *adapter = req->adapter;
970 struct zfcp_send_ct *send_ct = req->data;
971 struct fsf_qtcb_header *header = &req->qtcb->header;
972
973 send_ct->status = -EINVAL;
974
975 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
976 goto skip_fsfstatus;
977
978 switch (header->fsf_status) {
979 case FSF_GOOD:
980 zfcp_san_dbf_event_ct_response(req);
981 send_ct->status = 0;
982 break;
983 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
984 zfcp_fsf_class_not_supp(req);
985 break;
986 case FSF_ADAPTER_STATUS_AVAILABLE:
987 switch (header->fsf_status_qual.word[0]){
988 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
989 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
990 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
991 break;
992 }
993 break;
994 case FSF_ACCESS_DENIED:
995 break;
996 case FSF_PORT_BOXED:
997 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
998 ZFCP_STATUS_FSFREQ_RETRY;
999 break;
1000 case FSF_PORT_HANDLE_NOT_VALID:
1001 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1002 case FSF_GENERIC_COMMAND_REJECTED:
1003 case FSF_PAYLOAD_SIZE_MISMATCH:
1004 case FSF_REQUEST_SIZE_TOO_LARGE:
1005 case FSF_RESPONSE_SIZE_TOO_LARGE:
1006 case FSF_SBAL_MISMATCH:
1007 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1008 break;
1009 }
1010
1011 skip_fsfstatus:
1012 if (send_ct->handler)
1013 send_ct->handler(send_ct->handler_data);
1014 }
1015
1016 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1017 struct scatterlist *sg_req,
1018 struct scatterlist *sg_resp,
1019 int max_sbals)
1020 {
1021 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1022 u32 feat = req->adapter->adapter_features;
1023 int bytes;
1024
1025 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1026 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1027 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1028 return -EOPNOTSUPP;
1029
1030 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1031 sbale[2].addr = sg_virt(sg_req);
1032 sbale[2].length = sg_req->length;
1033 sbale[3].addr = sg_virt(sg_resp);
1034 sbale[3].length = sg_resp->length;
1035 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1036 return 0;
1037 }
1038
1039 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1040 sg_req, max_sbals);
1041 if (bytes <= 0)
1042 return -ENOMEM;
1043 req->qtcb->bottom.support.req_buf_length = bytes;
1044 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1045
1046 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1047 sg_resp, max_sbals);
1048 if (bytes <= 0)
1049 return -ENOMEM;
1050 req->qtcb->bottom.support.resp_buf_length = bytes;
1051
1052 return 0;
1053 }
1054
1055 /**
1056 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1057 * @ct: pointer to struct zfcp_send_ct with data for request
1058 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1059 * @erp_action: if non-null the Generic Service request sent within ERP
1060 */
1061 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1062 struct zfcp_erp_action *erp_action)
1063 {
1064 struct zfcp_wka_port *wka_port = ct->wka_port;
1065 struct zfcp_adapter *adapter = wka_port->adapter;
1066 struct zfcp_fsf_req *req;
1067 int ret = -EIO;
1068
1069 spin_lock_bh(&adapter->req_q_lock);
1070 if (zfcp_fsf_req_sbal_get(adapter))
1071 goto out;
1072
1073 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1074 ZFCP_REQ_AUTO_CLEANUP, pool);
1075 if (IS_ERR(req)) {
1076 ret = PTR_ERR(req);
1077 goto out;
1078 }
1079
1080 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1081 FSF_MAX_SBALS_PER_REQ);
1082 if (ret)
1083 goto failed_send;
1084
1085 req->handler = zfcp_fsf_send_ct_handler;
1086 req->qtcb->header.port_handle = wka_port->handle;
1087 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1088 req->qtcb->bottom.support.timeout = ct->timeout;
1089 req->data = ct;
1090
1091 zfcp_san_dbf_event_ct_request(req);
1092
1093 if (erp_action) {
1094 erp_action->fsf_req = req;
1095 req->erp_action = erp_action;
1096 zfcp_fsf_start_erp_timer(req);
1097 } else
1098 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1099
1100 ret = zfcp_fsf_req_send(req);
1101 if (ret)
1102 goto failed_send;
1103
1104 goto out;
1105
1106 failed_send:
1107 zfcp_fsf_req_free(req);
1108 if (erp_action)
1109 erp_action->fsf_req = NULL;
1110 out:
1111 spin_unlock_bh(&adapter->req_q_lock);
1112 return ret;
1113 }
1114
1115 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1116 {
1117 struct zfcp_send_els *send_els = req->data;
1118 struct zfcp_port *port = send_els->port;
1119 struct fsf_qtcb_header *header = &req->qtcb->header;
1120
1121 send_els->status = -EINVAL;
1122
1123 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1124 goto skip_fsfstatus;
1125
1126 switch (header->fsf_status) {
1127 case FSF_GOOD:
1128 zfcp_san_dbf_event_els_response(req);
1129 send_els->status = 0;
1130 break;
1131 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1132 zfcp_fsf_class_not_supp(req);
1133 break;
1134 case FSF_ADAPTER_STATUS_AVAILABLE:
1135 switch (header->fsf_status_qual.word[0]){
1136 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1137 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1138 zfcp_test_link(port);
1139 /*fall through */
1140 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1141 case FSF_SQ_RETRY_IF_POSSIBLE:
1142 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1143 break;
1144 }
1145 break;
1146 case FSF_ELS_COMMAND_REJECTED:
1147 case FSF_PAYLOAD_SIZE_MISMATCH:
1148 case FSF_REQUEST_SIZE_TOO_LARGE:
1149 case FSF_RESPONSE_SIZE_TOO_LARGE:
1150 break;
1151 case FSF_ACCESS_DENIED:
1152 zfcp_fsf_access_denied_port(req, port);
1153 break;
1154 case FSF_SBAL_MISMATCH:
1155 /* should never occure, avoided in zfcp_fsf_send_els */
1156 /* fall through */
1157 default:
1158 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1159 break;
1160 }
1161 skip_fsfstatus:
1162 if (send_els->handler)
1163 send_els->handler(send_els->handler_data);
1164 }
1165
1166 /**
1167 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1168 * @els: pointer to struct zfcp_send_els with data for the command
1169 */
1170 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1171 {
1172 struct zfcp_fsf_req *req;
1173 struct zfcp_adapter *adapter = els->adapter;
1174 struct fsf_qtcb_bottom_support *bottom;
1175 int ret = -EIO;
1176
1177 if (unlikely(!(atomic_read(&els->port->status) &
1178 ZFCP_STATUS_COMMON_UNBLOCKED)))
1179 return -EBUSY;
1180
1181 spin_lock(&adapter->req_q_lock);
1182 if (!zfcp_fsf_sbal_available(adapter))
1183 goto out;
1184 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1185 ZFCP_REQ_AUTO_CLEANUP, NULL);
1186 if (IS_ERR(req)) {
1187 ret = PTR_ERR(req);
1188 goto out;
1189 }
1190
1191 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1192
1193 if (ret)
1194 goto failed_send;
1195
1196 bottom = &req->qtcb->bottom.support;
1197 req->handler = zfcp_fsf_send_els_handler;
1198 bottom->d_id = els->d_id;
1199 bottom->service_class = FSF_CLASS_3;
1200 bottom->timeout = 2 * R_A_TOV;
1201 req->data = els;
1202
1203 zfcp_san_dbf_event_els_request(req);
1204
1205 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
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(&adapter->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_adapter *adapter = erp_action->adapter;
1224 int retval = -EIO;
1225
1226 spin_lock_bh(&adapter->req_q_lock);
1227 if (!zfcp_fsf_sbal_available(adapter))
1228 goto out;
1229 req = zfcp_fsf_req_create(adapter,
1230 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1231 ZFCP_REQ_AUTO_CLEANUP,
1232 adapter->pool.fsf_req_erp);
1233 if (IS_ERR(req)) {
1234 retval = PTR_ERR(req);
1235 goto out;
1236 }
1237
1238 sbale = zfcp_qdio_sbale_req(req);
1239 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1240 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1241
1242 req->qtcb->bottom.config.feature_selection =
1243 FSF_FEATURE_CFDC |
1244 FSF_FEATURE_LUN_SHARING |
1245 FSF_FEATURE_NOTIFICATION_LOST |
1246 FSF_FEATURE_UPDATE_ALERT;
1247 req->erp_action = erp_action;
1248 req->handler = zfcp_fsf_exchange_config_data_handler;
1249 erp_action->fsf_req = req;
1250
1251 zfcp_fsf_start_erp_timer(req);
1252 retval = zfcp_fsf_req_send(req);
1253 if (retval) {
1254 zfcp_fsf_req_free(req);
1255 erp_action->fsf_req = NULL;
1256 }
1257 out:
1258 spin_unlock_bh(&adapter->req_q_lock);
1259 return retval;
1260 }
1261
1262 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1263 struct fsf_qtcb_bottom_config *data)
1264 {
1265 struct qdio_buffer_element *sbale;
1266 struct zfcp_fsf_req *req = NULL;
1267 int retval = -EIO;
1268
1269 spin_lock_bh(&adapter->req_q_lock);
1270 if (zfcp_fsf_req_sbal_get(adapter))
1271 goto out;
1272
1273 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1274 0, NULL);
1275 if (IS_ERR(req)) {
1276 retval = PTR_ERR(req);
1277 goto out;
1278 }
1279
1280 sbale = zfcp_qdio_sbale_req(req);
1281 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1282 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1283 req->handler = zfcp_fsf_exchange_config_data_handler;
1284
1285 req->qtcb->bottom.config.feature_selection =
1286 FSF_FEATURE_CFDC |
1287 FSF_FEATURE_LUN_SHARING |
1288 FSF_FEATURE_NOTIFICATION_LOST |
1289 FSF_FEATURE_UPDATE_ALERT;
1290
1291 if (data)
1292 req->data = data;
1293
1294 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1295 retval = zfcp_fsf_req_send(req);
1296 out:
1297 spin_unlock_bh(&adapter->req_q_lock);
1298 if (!retval)
1299 wait_event(req->completion_wq,
1300 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1301
1302 zfcp_fsf_req_free(req);
1303
1304 return retval;
1305 }
1306
1307 /**
1308 * zfcp_fsf_exchange_port_data - request information about local port
1309 * @erp_action: ERP action for the adapter for which port data is requested
1310 * Returns: 0 on success, error otherwise
1311 */
1312 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1313 {
1314 struct qdio_buffer_element *sbale;
1315 struct zfcp_fsf_req *req;
1316 struct zfcp_adapter *adapter = erp_action->adapter;
1317 int retval = -EIO;
1318
1319 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1320 return -EOPNOTSUPP;
1321
1322 spin_lock_bh(&adapter->req_q_lock);
1323 if (!zfcp_fsf_sbal_available(adapter))
1324 goto out;
1325 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1326 ZFCP_REQ_AUTO_CLEANUP,
1327 adapter->pool.fsf_req_erp);
1328 if (IS_ERR(req)) {
1329 retval = PTR_ERR(req);
1330 goto out;
1331 }
1332
1333 sbale = zfcp_qdio_sbale_req(req);
1334 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1335 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1336
1337 req->handler = zfcp_fsf_exchange_port_data_handler;
1338 req->erp_action = erp_action;
1339 erp_action->fsf_req = req;
1340
1341 zfcp_fsf_start_erp_timer(req);
1342 retval = zfcp_fsf_req_send(req);
1343 if (retval) {
1344 zfcp_fsf_req_free(req);
1345 erp_action->fsf_req = NULL;
1346 }
1347 out:
1348 spin_unlock_bh(&adapter->req_q_lock);
1349 return retval;
1350 }
1351
1352 /**
1353 * zfcp_fsf_exchange_port_data_sync - request information about local port
1354 * @adapter: pointer to struct zfcp_adapter
1355 * @data: pointer to struct fsf_qtcb_bottom_port
1356 * Returns: 0 on success, error otherwise
1357 */
1358 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1359 struct fsf_qtcb_bottom_port *data)
1360 {
1361 struct qdio_buffer_element *sbale;
1362 struct zfcp_fsf_req *req = NULL;
1363 int retval = -EIO;
1364
1365 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1366 return -EOPNOTSUPP;
1367
1368 spin_lock_bh(&adapter->req_q_lock);
1369 if (!zfcp_fsf_sbal_available(adapter))
1370 goto out;
1371
1372 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1373 NULL);
1374 if (IS_ERR(req)) {
1375 retval = PTR_ERR(req);
1376 goto out;
1377 }
1378
1379 if (data)
1380 req->data = data;
1381
1382 sbale = zfcp_qdio_sbale_req(req);
1383 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1384 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1385
1386 req->handler = zfcp_fsf_exchange_port_data_handler;
1387 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1388 retval = zfcp_fsf_req_send(req);
1389 out:
1390 spin_unlock_bh(&adapter->req_q_lock);
1391 if (!retval)
1392 wait_event(req->completion_wq,
1393 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1394 zfcp_fsf_req_free(req);
1395
1396 return retval;
1397 }
1398
1399 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1400 {
1401 struct zfcp_port *port = req->data;
1402 struct fsf_qtcb_header *header = &req->qtcb->header;
1403 struct fsf_plogi *plogi;
1404
1405 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1406 return;
1407
1408 switch (header->fsf_status) {
1409 case FSF_PORT_ALREADY_OPEN:
1410 break;
1411 case FSF_ACCESS_DENIED:
1412 zfcp_fsf_access_denied_port(req, port);
1413 break;
1414 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1415 dev_warn(&req->adapter->ccw_device->dev,
1416 "Not enough FCP adapter resources to open "
1417 "remote port 0x%016Lx\n",
1418 (unsigned long long)port->wwpn);
1419 zfcp_erp_port_failed(port, 31, req);
1420 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1421 break;
1422 case FSF_ADAPTER_STATUS_AVAILABLE:
1423 switch (header->fsf_status_qual.word[0]) {
1424 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1425 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1426 case FSF_SQ_NO_RETRY_POSSIBLE:
1427 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1428 break;
1429 }
1430 break;
1431 case FSF_GOOD:
1432 port->handle = header->port_handle;
1433 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1434 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1435 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1436 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1437 &port->status);
1438 /* check whether D_ID has changed during open */
1439 /*
1440 * FIXME: This check is not airtight, as the FCP channel does
1441 * not monitor closures of target port connections caused on
1442 * the remote side. Thus, they might miss out on invalidating
1443 * locally cached WWPNs (and other N_Port parameters) of gone
1444 * target ports. So, our heroic attempt to make things safe
1445 * could be undermined by 'open port' response data tagged with
1446 * obsolete WWPNs. Another reason to monitor potential
1447 * connection closures ourself at least (by interpreting
1448 * incoming ELS' and unsolicited status). It just crosses my
1449 * mind that one should be able to cross-check by means of
1450 * another GID_PN straight after a port has been opened.
1451 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1452 */
1453 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1454 if (req->qtcb->bottom.support.els1_length >=
1455 FSF_PLOGI_MIN_LEN) {
1456 if (plogi->serv_param.wwpn != port->wwpn)
1457 port->d_id = 0;
1458 else {
1459 port->wwnn = plogi->serv_param.wwnn;
1460 zfcp_fc_plogi_evaluate(port, plogi);
1461 }
1462 }
1463 break;
1464 case FSF_UNKNOWN_OP_SUBTYPE:
1465 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1466 break;
1467 }
1468 }
1469
1470 /**
1471 * zfcp_fsf_open_port - create and send open port request
1472 * @erp_action: pointer to struct zfcp_erp_action
1473 * Returns: 0 on success, error otherwise
1474 */
1475 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1476 {
1477 struct qdio_buffer_element *sbale;
1478 struct zfcp_adapter *adapter = erp_action->adapter;
1479 struct zfcp_fsf_req *req;
1480 int retval = -EIO;
1481
1482 spin_lock_bh(&adapter->req_q_lock);
1483 if (zfcp_fsf_req_sbal_get(adapter))
1484 goto out;
1485
1486 req = zfcp_fsf_req_create(adapter,
1487 FSF_QTCB_OPEN_PORT_WITH_DID,
1488 ZFCP_REQ_AUTO_CLEANUP,
1489 adapter->pool.fsf_req_erp);
1490 if (IS_ERR(req)) {
1491 retval = PTR_ERR(req);
1492 goto out;
1493 }
1494
1495 sbale = zfcp_qdio_sbale_req(req);
1496 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1497 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1498
1499 req->handler = zfcp_fsf_open_port_handler;
1500 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1501 req->data = erp_action->port;
1502 req->erp_action = erp_action;
1503 erp_action->fsf_req = req;
1504
1505 zfcp_fsf_start_erp_timer(req);
1506 retval = zfcp_fsf_req_send(req);
1507 if (retval) {
1508 zfcp_fsf_req_free(req);
1509 erp_action->fsf_req = NULL;
1510 }
1511 out:
1512 spin_unlock_bh(&adapter->req_q_lock);
1513 return retval;
1514 }
1515
1516 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1517 {
1518 struct zfcp_port *port = req->data;
1519
1520 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1521 return;
1522
1523 switch (req->qtcb->header.fsf_status) {
1524 case FSF_PORT_HANDLE_NOT_VALID:
1525 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1526 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1527 break;
1528 case FSF_ADAPTER_STATUS_AVAILABLE:
1529 break;
1530 case FSF_GOOD:
1531 zfcp_erp_modify_port_status(port, 33, req,
1532 ZFCP_STATUS_COMMON_OPEN,
1533 ZFCP_CLEAR);
1534 break;
1535 }
1536 }
1537
1538 /**
1539 * zfcp_fsf_close_port - create and send close port request
1540 * @erp_action: pointer to struct zfcp_erp_action
1541 * Returns: 0 on success, error otherwise
1542 */
1543 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1544 {
1545 struct qdio_buffer_element *sbale;
1546 struct zfcp_adapter *adapter = erp_action->adapter;
1547 struct zfcp_fsf_req *req;
1548 int retval = -EIO;
1549
1550 spin_lock_bh(&adapter->req_q_lock);
1551 if (zfcp_fsf_req_sbal_get(adapter))
1552 goto out;
1553
1554 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1555 ZFCP_REQ_AUTO_CLEANUP,
1556 adapter->pool.fsf_req_erp);
1557 if (IS_ERR(req)) {
1558 retval = PTR_ERR(req);
1559 goto out;
1560 }
1561
1562 sbale = zfcp_qdio_sbale_req(req);
1563 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1564 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1565
1566 req->handler = zfcp_fsf_close_port_handler;
1567 req->data = erp_action->port;
1568 req->erp_action = erp_action;
1569 req->qtcb->header.port_handle = erp_action->port->handle;
1570 erp_action->fsf_req = req;
1571
1572 zfcp_fsf_start_erp_timer(req);
1573 retval = zfcp_fsf_req_send(req);
1574 if (retval) {
1575 zfcp_fsf_req_free(req);
1576 erp_action->fsf_req = NULL;
1577 }
1578 out:
1579 spin_unlock_bh(&adapter->req_q_lock);
1580 return retval;
1581 }
1582
1583 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1584 {
1585 struct zfcp_wka_port *wka_port = req->data;
1586 struct fsf_qtcb_header *header = &req->qtcb->header;
1587
1588 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1589 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1590 goto out;
1591 }
1592
1593 switch (header->fsf_status) {
1594 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1595 dev_warn(&req->adapter->ccw_device->dev,
1596 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1597 case FSF_ADAPTER_STATUS_AVAILABLE:
1598 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1599 case FSF_ACCESS_DENIED:
1600 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1601 break;
1602 case FSF_PORT_ALREADY_OPEN:
1603 break;
1604 case FSF_GOOD:
1605 wka_port->handle = header->port_handle;
1606 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1607 }
1608 out:
1609 wake_up(&wka_port->completion_wq);
1610 }
1611
1612 /**
1613 * zfcp_fsf_open_wka_port - create and send open wka-port request
1614 * @wka_port: pointer to struct zfcp_wka_port
1615 * Returns: 0 on success, error otherwise
1616 */
1617 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1618 {
1619 struct qdio_buffer_element *sbale;
1620 struct zfcp_adapter *adapter = wka_port->adapter;
1621 struct zfcp_fsf_req *req;
1622 int retval = -EIO;
1623
1624 spin_lock_bh(&adapter->req_q_lock);
1625 if (zfcp_fsf_req_sbal_get(adapter))
1626 goto out;
1627
1628 req = zfcp_fsf_req_create(adapter,
1629 FSF_QTCB_OPEN_PORT_WITH_DID,
1630 ZFCP_REQ_AUTO_CLEANUP,
1631 adapter->pool.fsf_req_erp);
1632 if (unlikely(IS_ERR(req))) {
1633 retval = PTR_ERR(req);
1634 goto out;
1635 }
1636
1637 sbale = zfcp_qdio_sbale_req(req);
1638 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1639 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1640
1641 req->handler = zfcp_fsf_open_wka_port_handler;
1642 req->qtcb->bottom.support.d_id = wka_port->d_id;
1643 req->data = wka_port;
1644
1645 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1646 retval = zfcp_fsf_req_send(req);
1647 if (retval)
1648 zfcp_fsf_req_free(req);
1649 out:
1650 spin_unlock_bh(&adapter->req_q_lock);
1651 return retval;
1652 }
1653
1654 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1655 {
1656 struct zfcp_wka_port *wka_port = req->data;
1657
1658 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1659 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1660 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1661 }
1662
1663 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1664 wake_up(&wka_port->completion_wq);
1665 }
1666
1667 /**
1668 * zfcp_fsf_close_wka_port - create and send close wka port request
1669 * @erp_action: pointer to struct zfcp_erp_action
1670 * Returns: 0 on success, error otherwise
1671 */
1672 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1673 {
1674 struct qdio_buffer_element *sbale;
1675 struct zfcp_adapter *adapter = wka_port->adapter;
1676 struct zfcp_fsf_req *req;
1677 int retval = -EIO;
1678
1679 spin_lock_bh(&adapter->req_q_lock);
1680 if (zfcp_fsf_req_sbal_get(adapter))
1681 goto out;
1682
1683 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1684 ZFCP_REQ_AUTO_CLEANUP,
1685 adapter->pool.fsf_req_erp);
1686 if (unlikely(IS_ERR(req))) {
1687 retval = PTR_ERR(req);
1688 goto out;
1689 }
1690
1691 sbale = zfcp_qdio_sbale_req(req);
1692 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1693 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1694
1695 req->handler = zfcp_fsf_close_wka_port_handler;
1696 req->data = wka_port;
1697 req->qtcb->header.port_handle = wka_port->handle;
1698
1699 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1700 retval = zfcp_fsf_req_send(req);
1701 if (retval)
1702 zfcp_fsf_req_free(req);
1703 out:
1704 spin_unlock_bh(&adapter->req_q_lock);
1705 return retval;
1706 }
1707
1708 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1709 {
1710 struct zfcp_port *port = req->data;
1711 struct fsf_qtcb_header *header = &req->qtcb->header;
1712 struct zfcp_unit *unit;
1713
1714 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1715 goto skip_fsfstatus;
1716
1717 switch (header->fsf_status) {
1718 case FSF_PORT_HANDLE_NOT_VALID:
1719 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1720 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1721 break;
1722 case FSF_ACCESS_DENIED:
1723 zfcp_fsf_access_denied_port(req, port);
1724 break;
1725 case FSF_PORT_BOXED:
1726 zfcp_erp_port_boxed(port, 50, req);
1727 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1728 ZFCP_STATUS_FSFREQ_RETRY;
1729 /* can't use generic zfcp_erp_modify_port_status because
1730 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1731 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1732 list_for_each_entry(unit, &port->unit_list_head, list)
1733 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1734 &unit->status);
1735 break;
1736 case FSF_ADAPTER_STATUS_AVAILABLE:
1737 switch (header->fsf_status_qual.word[0]) {
1738 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1739 /* fall through */
1740 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1741 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1742 break;
1743 }
1744 break;
1745 case FSF_GOOD:
1746 /* can't use generic zfcp_erp_modify_port_status because
1747 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1748 */
1749 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1750 list_for_each_entry(unit, &port->unit_list_head, list)
1751 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1752 &unit->status);
1753 break;
1754 }
1755 skip_fsfstatus:
1756 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1757 }
1758
1759 /**
1760 * zfcp_fsf_close_physical_port - close physical port
1761 * @erp_action: pointer to struct zfcp_erp_action
1762 * Returns: 0 on success
1763 */
1764 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1765 {
1766 struct qdio_buffer_element *sbale;
1767 struct zfcp_adapter *adapter = erp_action->adapter;
1768 struct zfcp_fsf_req *req;
1769 int retval = -EIO;
1770
1771 spin_lock_bh(&adapter->req_q_lock);
1772 if (zfcp_fsf_req_sbal_get(adapter))
1773 goto out;
1774
1775 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1776 ZFCP_REQ_AUTO_CLEANUP,
1777 adapter->pool.fsf_req_erp);
1778 if (IS_ERR(req)) {
1779 retval = PTR_ERR(req);
1780 goto out;
1781 }
1782
1783 sbale = zfcp_qdio_sbale_req(req);
1784 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1785 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1786
1787 req->data = erp_action->port;
1788 req->qtcb->header.port_handle = erp_action->port->handle;
1789 req->erp_action = erp_action;
1790 req->handler = zfcp_fsf_close_physical_port_handler;
1791 erp_action->fsf_req = req;
1792 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1793 &erp_action->port->status);
1794
1795 zfcp_fsf_start_erp_timer(req);
1796 retval = zfcp_fsf_req_send(req);
1797 if (retval) {
1798 zfcp_fsf_req_free(req);
1799 erp_action->fsf_req = NULL;
1800 }
1801 out:
1802 spin_unlock_bh(&adapter->req_q_lock);
1803 return retval;
1804 }
1805
1806 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1807 {
1808 struct zfcp_adapter *adapter = req->adapter;
1809 struct zfcp_unit *unit = req->data;
1810 struct fsf_qtcb_header *header = &req->qtcb->header;
1811 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1812 struct fsf_queue_designator *queue_designator =
1813 &header->fsf_status_qual.fsf_queue_designator;
1814 int exclusive, readwrite;
1815
1816 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1817 return;
1818
1819 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1820 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1821 ZFCP_STATUS_UNIT_SHARED |
1822 ZFCP_STATUS_UNIT_READONLY,
1823 &unit->status);
1824
1825 switch (header->fsf_status) {
1826
1827 case FSF_PORT_HANDLE_NOT_VALID:
1828 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1829 /* fall through */
1830 case FSF_LUN_ALREADY_OPEN:
1831 break;
1832 case FSF_ACCESS_DENIED:
1833 zfcp_fsf_access_denied_unit(req, unit);
1834 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1835 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1836 break;
1837 case FSF_PORT_BOXED:
1838 zfcp_erp_port_boxed(unit->port, 51, req);
1839 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1840 ZFCP_STATUS_FSFREQ_RETRY;
1841 break;
1842 case FSF_LUN_SHARING_VIOLATION:
1843 if (header->fsf_status_qual.word[0])
1844 dev_warn(&adapter->ccw_device->dev,
1845 "LUN 0x%Lx on port 0x%Lx is already in "
1846 "use by CSS%d, MIF Image ID %x\n",
1847 (unsigned long long)unit->fcp_lun,
1848 (unsigned long long)unit->port->wwpn,
1849 queue_designator->cssid,
1850 queue_designator->hla);
1851 else
1852 zfcp_act_eval_err(adapter,
1853 header->fsf_status_qual.word[2]);
1854 zfcp_erp_unit_access_denied(unit, 60, req);
1855 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1856 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1858 break;
1859 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1860 dev_warn(&adapter->ccw_device->dev,
1861 "No handle is available for LUN "
1862 "0x%016Lx on port 0x%016Lx\n",
1863 (unsigned long long)unit->fcp_lun,
1864 (unsigned long long)unit->port->wwpn);
1865 zfcp_erp_unit_failed(unit, 34, req);
1866 /* fall through */
1867 case FSF_INVALID_COMMAND_OPTION:
1868 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1869 break;
1870 case FSF_ADAPTER_STATUS_AVAILABLE:
1871 switch (header->fsf_status_qual.word[0]) {
1872 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1873 zfcp_test_link(unit->port);
1874 /* fall through */
1875 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1877 break;
1878 }
1879 break;
1880
1881 case FSF_GOOD:
1882 unit->handle = header->lun_handle;
1883 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1884
1885 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1886 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1887 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1888 exclusive = (bottom->lun_access_info &
1889 FSF_UNIT_ACCESS_EXCLUSIVE);
1890 readwrite = (bottom->lun_access_info &
1891 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1892
1893 if (!exclusive)
1894 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1895 &unit->status);
1896
1897 if (!readwrite) {
1898 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1899 &unit->status);
1900 dev_info(&adapter->ccw_device->dev,
1901 "SCSI device at LUN 0x%016Lx on port "
1902 "0x%016Lx opened read-only\n",
1903 (unsigned long long)unit->fcp_lun,
1904 (unsigned long long)unit->port->wwpn);
1905 }
1906
1907 if (exclusive && !readwrite) {
1908 dev_err(&adapter->ccw_device->dev,
1909 "Exclusive read-only access not "
1910 "supported (unit 0x%016Lx, "
1911 "port 0x%016Lx)\n",
1912 (unsigned long long)unit->fcp_lun,
1913 (unsigned long long)unit->port->wwpn);
1914 zfcp_erp_unit_failed(unit, 35, req);
1915 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1916 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1917 } else if (!exclusive && readwrite) {
1918 dev_err(&adapter->ccw_device->dev,
1919 "Shared read-write access not "
1920 "supported (unit 0x%016Lx, port "
1921 "0x%016Lx)\n",
1922 (unsigned long long)unit->fcp_lun,
1923 (unsigned long long)unit->port->wwpn);
1924 zfcp_erp_unit_failed(unit, 36, req);
1925 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1926 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1927 }
1928 }
1929 break;
1930 }
1931 }
1932
1933 /**
1934 * zfcp_fsf_open_unit - open unit
1935 * @erp_action: pointer to struct zfcp_erp_action
1936 * Returns: 0 on success, error otherwise
1937 */
1938 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1939 {
1940 struct qdio_buffer_element *sbale;
1941 struct zfcp_adapter *adapter = erp_action->adapter;
1942 struct zfcp_fsf_req *req;
1943 int retval = -EIO;
1944
1945 spin_lock_bh(&adapter->req_q_lock);
1946 if (zfcp_fsf_req_sbal_get(adapter))
1947 goto out;
1948
1949 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1950 ZFCP_REQ_AUTO_CLEANUP,
1951 adapter->pool.fsf_req_erp);
1952 if (IS_ERR(req)) {
1953 retval = PTR_ERR(req);
1954 goto out;
1955 }
1956
1957 sbale = zfcp_qdio_sbale_req(req);
1958 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1959 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1960
1961 req->qtcb->header.port_handle = erp_action->port->handle;
1962 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1963 req->handler = zfcp_fsf_open_unit_handler;
1964 req->data = erp_action->unit;
1965 req->erp_action = erp_action;
1966 erp_action->fsf_req = req;
1967
1968 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1969 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1970
1971 zfcp_fsf_start_erp_timer(req);
1972 retval = zfcp_fsf_req_send(req);
1973 if (retval) {
1974 zfcp_fsf_req_free(req);
1975 erp_action->fsf_req = NULL;
1976 }
1977 out:
1978 spin_unlock_bh(&adapter->req_q_lock);
1979 return retval;
1980 }
1981
1982 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1983 {
1984 struct zfcp_unit *unit = req->data;
1985
1986 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1987 return;
1988
1989 switch (req->qtcb->header.fsf_status) {
1990 case FSF_PORT_HANDLE_NOT_VALID:
1991 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1992 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1993 break;
1994 case FSF_LUN_HANDLE_NOT_VALID:
1995 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1996 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1997 break;
1998 case FSF_PORT_BOXED:
1999 zfcp_erp_port_boxed(unit->port, 52, req);
2000 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2001 ZFCP_STATUS_FSFREQ_RETRY;
2002 break;
2003 case FSF_ADAPTER_STATUS_AVAILABLE:
2004 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2005 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2006 zfcp_test_link(unit->port);
2007 /* fall through */
2008 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2009 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2010 break;
2011 }
2012 break;
2013 case FSF_GOOD:
2014 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2015 break;
2016 }
2017 }
2018
2019 /**
2020 * zfcp_fsf_close_unit - close zfcp unit
2021 * @erp_action: pointer to struct zfcp_unit
2022 * Returns: 0 on success, error otherwise
2023 */
2024 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2025 {
2026 struct qdio_buffer_element *sbale;
2027 struct zfcp_adapter *adapter = erp_action->adapter;
2028 struct zfcp_fsf_req *req;
2029 int retval = -EIO;
2030
2031 spin_lock_bh(&adapter->req_q_lock);
2032 if (zfcp_fsf_req_sbal_get(adapter))
2033 goto out;
2034 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2035 ZFCP_REQ_AUTO_CLEANUP,
2036 adapter->pool.fsf_req_erp);
2037 if (IS_ERR(req)) {
2038 retval = PTR_ERR(req);
2039 goto out;
2040 }
2041
2042 sbale = zfcp_qdio_sbale_req(req);
2043 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2044 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2045
2046 req->qtcb->header.port_handle = erp_action->port->handle;
2047 req->qtcb->header.lun_handle = erp_action->unit->handle;
2048 req->handler = zfcp_fsf_close_unit_handler;
2049 req->data = erp_action->unit;
2050 req->erp_action = erp_action;
2051 erp_action->fsf_req = req;
2052
2053 zfcp_fsf_start_erp_timer(req);
2054 retval = zfcp_fsf_req_send(req);
2055 if (retval) {
2056 zfcp_fsf_req_free(req);
2057 erp_action->fsf_req = NULL;
2058 }
2059 out:
2060 spin_unlock_bh(&adapter->req_q_lock);
2061 return retval;
2062 }
2063
2064 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2065 {
2066 lat_rec->sum += lat;
2067 lat_rec->min = min(lat_rec->min, lat);
2068 lat_rec->max = max(lat_rec->max, lat);
2069 }
2070
2071 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2072 {
2073 struct fsf_qual_latency_info *lat_inf;
2074 struct latency_cont *lat;
2075 struct zfcp_unit *unit = req->unit;
2076 unsigned long flags;
2077
2078 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2079
2080 switch (req->qtcb->bottom.io.data_direction) {
2081 case FSF_DATADIR_READ:
2082 lat = &unit->latencies.read;
2083 break;
2084 case FSF_DATADIR_WRITE:
2085 lat = &unit->latencies.write;
2086 break;
2087 case FSF_DATADIR_CMND:
2088 lat = &unit->latencies.cmd;
2089 break;
2090 default:
2091 return;
2092 }
2093
2094 spin_lock_irqsave(&unit->latencies.lock, flags);
2095 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2096 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2097 lat->counter++;
2098 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2099 }
2100
2101 #ifdef CONFIG_BLK_DEV_IO_TRACE
2102 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2103 {
2104 struct fsf_qual_latency_info *lat_inf;
2105 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2106 struct request *req = scsi_cmnd->request;
2107 struct zfcp_blk_drv_data trace;
2108 int ticks = fsf_req->adapter->timer_ticks;
2109
2110 trace.flags = 0;
2111 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2112 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2113 trace.flags |= ZFCP_BLK_LAT_VALID;
2114 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2115 trace.channel_lat = lat_inf->channel_lat * ticks;
2116 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2117 }
2118 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2119 trace.flags |= ZFCP_BLK_REQ_ERROR;
2120 trace.inb_usage = fsf_req->qdio_inb_usage;
2121 trace.outb_usage = fsf_req->qdio_outb_usage;
2122
2123 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2124 }
2125 #else
2126 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2127 {
2128 }
2129 #endif
2130
2131 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2132 {
2133 struct scsi_cmnd *scpnt;
2134 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2135 &(req->qtcb->bottom.io.fcp_rsp);
2136 u32 sns_len;
2137 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2138 unsigned long flags;
2139
2140 read_lock_irqsave(&req->adapter->abort_lock, flags);
2141
2142 scpnt = req->data;
2143 if (unlikely(!scpnt)) {
2144 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2145 return;
2146 }
2147
2148 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2149 set_host_byte(scpnt, DID_SOFT_ERROR);
2150 set_driver_byte(scpnt, SUGGEST_RETRY);
2151 goto skip_fsfstatus;
2152 }
2153
2154 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2155 set_host_byte(scpnt, DID_ERROR);
2156 goto skip_fsfstatus;
2157 }
2158
2159 set_msg_byte(scpnt, COMMAND_COMPLETE);
2160
2161 scpnt->result |= fcp_rsp_iu->scsi_status;
2162
2163 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2164 zfcp_fsf_req_latency(req);
2165
2166 zfcp_fsf_trace_latency(req);
2167
2168 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2169 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2170 set_host_byte(scpnt, DID_OK);
2171 else {
2172 set_host_byte(scpnt, DID_ERROR);
2173 goto skip_fsfstatus;
2174 }
2175 }
2176
2177 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2178 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2179 fcp_rsp_iu->fcp_rsp_len;
2180 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2181 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2182
2183 memcpy(scpnt->sense_buffer,
2184 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2185 }
2186
2187 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2188 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2189 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2190 scpnt->underflow)
2191 set_host_byte(scpnt, DID_ERROR);
2192 }
2193 skip_fsfstatus:
2194 if (scpnt->result != 0)
2195 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2196 else if (scpnt->retries > 0)
2197 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2198 else
2199 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2200
2201 scpnt->host_scribble = NULL;
2202 (scpnt->scsi_done) (scpnt);
2203 /*
2204 * We must hold this lock until scsi_done has been called.
2205 * Otherwise we may call scsi_done after abort regarding this
2206 * command has completed.
2207 * Note: scsi_done must not block!
2208 */
2209 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2210 }
2211
2212 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2213 {
2214 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2215 &(req->qtcb->bottom.io.fcp_rsp);
2216 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2217
2218 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2219 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2220 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2221 }
2222
2223
2224 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2225 {
2226 struct zfcp_unit *unit;
2227 struct fsf_qtcb_header *header = &req->qtcb->header;
2228
2229 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2230 unit = req->data;
2231 else
2232 unit = req->unit;
2233
2234 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2235 goto skip_fsfstatus;
2236
2237 switch (header->fsf_status) {
2238 case FSF_HANDLE_MISMATCH:
2239 case FSF_PORT_HANDLE_NOT_VALID:
2240 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2241 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2242 break;
2243 case FSF_FCPLUN_NOT_VALID:
2244 case FSF_LUN_HANDLE_NOT_VALID:
2245 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2246 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2247 break;
2248 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2249 zfcp_fsf_class_not_supp(req);
2250 break;
2251 case FSF_ACCESS_DENIED:
2252 zfcp_fsf_access_denied_unit(req, unit);
2253 break;
2254 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2255 dev_err(&req->adapter->ccw_device->dev,
2256 "Incorrect direction %d, unit 0x%016Lx on port "
2257 "0x%016Lx closed\n",
2258 req->qtcb->bottom.io.data_direction,
2259 (unsigned long long)unit->fcp_lun,
2260 (unsigned long long)unit->port->wwpn);
2261 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2262 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2263 break;
2264 case FSF_CMND_LENGTH_NOT_VALID:
2265 dev_err(&req->adapter->ccw_device->dev,
2266 "Incorrect CDB length %d, unit 0x%016Lx on "
2267 "port 0x%016Lx closed\n",
2268 req->qtcb->bottom.io.fcp_cmnd_length,
2269 (unsigned long long)unit->fcp_lun,
2270 (unsigned long long)unit->port->wwpn);
2271 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2272 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2273 break;
2274 case FSF_PORT_BOXED:
2275 zfcp_erp_port_boxed(unit->port, 53, req);
2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2277 ZFCP_STATUS_FSFREQ_RETRY;
2278 break;
2279 case FSF_LUN_BOXED:
2280 zfcp_erp_unit_boxed(unit, 54, req);
2281 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2282 ZFCP_STATUS_FSFREQ_RETRY;
2283 break;
2284 case FSF_ADAPTER_STATUS_AVAILABLE:
2285 if (header->fsf_status_qual.word[0] ==
2286 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2287 zfcp_test_link(unit->port);
2288 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2289 break;
2290 }
2291 skip_fsfstatus:
2292 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2293 zfcp_fsf_send_fcp_ctm_handler(req);
2294 else {
2295 zfcp_fsf_send_fcp_command_task_handler(req);
2296 req->unit = NULL;
2297 zfcp_unit_put(unit);
2298 }
2299 }
2300
2301 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2302 {
2303 u32 *fcp_dl_ptr;
2304
2305 /*
2306 * fcp_dl_addr = start address of fcp_cmnd structure +
2307 * size of fixed part + size of dynamically sized add_dcp_cdb field
2308 * SEE FCP-2 documentation
2309 */
2310 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2311 (fcp_cmd->add_fcp_cdb_length << 2));
2312 *fcp_dl_ptr = fcp_dl;
2313 }
2314
2315 /**
2316 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2317 * @adapter: adapter where scsi command is issued
2318 * @unit: unit where command is sent to
2319 * @scsi_cmnd: scsi command to be sent
2320 * @timer: timer to be started when request is initiated
2321 * @req_flags: flags for fsf_request
2322 */
2323 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2324 struct zfcp_unit *unit,
2325 struct scsi_cmnd *scsi_cmnd,
2326 int use_timer, int req_flags)
2327 {
2328 struct zfcp_fsf_req *req;
2329 struct fcp_cmnd_iu *fcp_cmnd_iu;
2330 unsigned int sbtype;
2331 int real_bytes, retval = -EIO;
2332
2333 if (unlikely(!(atomic_read(&unit->status) &
2334 ZFCP_STATUS_COMMON_UNBLOCKED)))
2335 return -EBUSY;
2336
2337 spin_lock(&adapter->req_q_lock);
2338 if (!zfcp_fsf_sbal_available(adapter))
2339 goto out;
2340 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2341 adapter->pool.fsf_req_scsi);
2342 if (IS_ERR(req)) {
2343 retval = PTR_ERR(req);
2344 goto out;
2345 }
2346
2347 zfcp_unit_get(unit);
2348 req->unit = unit;
2349 req->data = scsi_cmnd;
2350 req->handler = zfcp_fsf_send_fcp_command_handler;
2351 req->qtcb->header.lun_handle = unit->handle;
2352 req->qtcb->header.port_handle = unit->port->handle;
2353 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2354
2355 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2356
2357 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2358 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2359 /*
2360 * set depending on data direction:
2361 * data direction bits in SBALE (SB Type)
2362 * data direction bits in QTCB
2363 * data direction bits in FCP_CMND IU
2364 */
2365 switch (scsi_cmnd->sc_data_direction) {
2366 case DMA_NONE:
2367 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2368 sbtype = SBAL_FLAGS0_TYPE_READ;
2369 break;
2370 case DMA_FROM_DEVICE:
2371 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2372 sbtype = SBAL_FLAGS0_TYPE_READ;
2373 fcp_cmnd_iu->rddata = 1;
2374 break;
2375 case DMA_TO_DEVICE:
2376 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2377 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2378 fcp_cmnd_iu->wddata = 1;
2379 break;
2380 case DMA_BIDIRECTIONAL:
2381 default:
2382 retval = -EIO;
2383 goto failed_scsi_cmnd;
2384 }
2385
2386 if (likely((scsi_cmnd->device->simple_tags) ||
2387 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2388 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2389 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2390 else
2391 fcp_cmnd_iu->task_attribute = UNTAGGED;
2392
2393 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2394 fcp_cmnd_iu->add_fcp_cdb_length =
2395 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2396
2397 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2398
2399 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2400 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2401
2402 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2403 scsi_sglist(scsi_cmnd),
2404 FSF_MAX_SBALS_PER_REQ);
2405 if (unlikely(real_bytes < 0)) {
2406 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2407 retval = -EIO;
2408 else {
2409 dev_err(&adapter->ccw_device->dev,
2410 "Oversize data package, unit 0x%016Lx "
2411 "on port 0x%016Lx closed\n",
2412 (unsigned long long)unit->fcp_lun,
2413 (unsigned long long)unit->port->wwpn);
2414 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2415 retval = -EINVAL;
2416 }
2417 goto failed_scsi_cmnd;
2418 }
2419
2420 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2421
2422 if (use_timer)
2423 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2424
2425 retval = zfcp_fsf_req_send(req);
2426 if (unlikely(retval))
2427 goto failed_scsi_cmnd;
2428
2429 goto out;
2430
2431 failed_scsi_cmnd:
2432 zfcp_unit_put(unit);
2433 zfcp_fsf_req_free(req);
2434 scsi_cmnd->host_scribble = NULL;
2435 out:
2436 spin_unlock(&adapter->req_q_lock);
2437 return retval;
2438 }
2439
2440 /**
2441 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2442 * @adapter: pointer to struct zfcp-adapter
2443 * @unit: pointer to struct zfcp_unit
2444 * @tm_flags: unsigned byte for task management flags
2445 * @req_flags: int request flags
2446 * Returns: on success pointer to struct fsf_req, NULL otherwise
2447 */
2448 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2449 struct zfcp_unit *unit,
2450 u8 tm_flags, int req_flags)
2451 {
2452 struct qdio_buffer_element *sbale;
2453 struct zfcp_fsf_req *req = NULL;
2454 struct fcp_cmnd_iu *fcp_cmnd_iu;
2455
2456 if (unlikely(!(atomic_read(&unit->status) &
2457 ZFCP_STATUS_COMMON_UNBLOCKED)))
2458 return NULL;
2459
2460 spin_lock(&adapter->req_q_lock);
2461 if (!zfcp_fsf_sbal_available(adapter))
2462 goto out;
2463 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2464 adapter->pool.fsf_req_scsi);
2465 if (IS_ERR(req)) {
2466 req = NULL;
2467 goto out;
2468 }
2469
2470 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2471 req->data = unit;
2472 req->handler = zfcp_fsf_send_fcp_command_handler;
2473 req->qtcb->header.lun_handle = unit->handle;
2474 req->qtcb->header.port_handle = unit->port->handle;
2475 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2476 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2477 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2478 sizeof(u32);
2479
2480 sbale = zfcp_qdio_sbale_req(req);
2481 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2482 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2483
2484 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2485 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2486 fcp_cmnd_iu->task_management_flags = tm_flags;
2487
2488 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2489 if (!zfcp_fsf_req_send(req))
2490 goto out;
2491
2492 zfcp_fsf_req_free(req);
2493 req = NULL;
2494 out:
2495 spin_unlock(&adapter->req_q_lock);
2496 return req;
2497 }
2498
2499 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2500 {
2501 if (req->qtcb->header.fsf_status != FSF_GOOD)
2502 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2503 }
2504
2505 /**
2506 * zfcp_fsf_control_file - control file upload/download
2507 * @adapter: pointer to struct zfcp_adapter
2508 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2509 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2510 */
2511 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2512 struct zfcp_fsf_cfdc *fsf_cfdc)
2513 {
2514 struct qdio_buffer_element *sbale;
2515 struct zfcp_fsf_req *req = NULL;
2516 struct fsf_qtcb_bottom_support *bottom;
2517 int direction, retval = -EIO, bytes;
2518
2519 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2520 return ERR_PTR(-EOPNOTSUPP);
2521
2522 switch (fsf_cfdc->command) {
2523 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2524 direction = SBAL_FLAGS0_TYPE_WRITE;
2525 break;
2526 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2527 direction = SBAL_FLAGS0_TYPE_READ;
2528 break;
2529 default:
2530 return ERR_PTR(-EINVAL);
2531 }
2532
2533 spin_lock_bh(&adapter->req_q_lock);
2534 if (zfcp_fsf_req_sbal_get(adapter))
2535 goto out;
2536
2537 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2538 if (IS_ERR(req)) {
2539 retval = -EPERM;
2540 goto out;
2541 }
2542
2543 req->handler = zfcp_fsf_control_file_handler;
2544
2545 sbale = zfcp_qdio_sbale_req(req);
2546 sbale[0].flags |= direction;
2547
2548 bottom = &req->qtcb->bottom.support;
2549 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2550 bottom->option = fsf_cfdc->option;
2551
2552 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2553 FSF_MAX_SBALS_PER_REQ);
2554 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2555 retval = -ENOMEM;
2556 zfcp_fsf_req_free(req);
2557 goto out;
2558 }
2559
2560 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2561 retval = zfcp_fsf_req_send(req);
2562 out:
2563 spin_unlock_bh(&adapter->req_q_lock);
2564
2565 if (!retval) {
2566 wait_event(req->completion_wq,
2567 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2568 return req;
2569 }
2570 return ERR_PTR(retval);
2571 }
(Inofficial) Linux kernel tree running on the Nao robot