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mtd: nand_base: use __func__ instead of typing names
[linux/fpc-iii.git] / drivers / s390 / scsi / zfcp_fsf.c
blob47795fbf081fdc823ec92dc35e00aaee84aec218
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
15 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
16 #define ZFCP_REQ_NO_QTCB 0x00000008
17
18 static void zfcp_fsf_request_timeout_handler(unsigned long data)
19 {
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
22 "fsrth_1", NULL);
23 }
24
25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
27 {
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
32 }
33
34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
35 {
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
41 }
42
43 /* association between FSF command and FSF QTCB type */
44 static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
58 };
59
60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
61 {
62 u16 subtable = table >> 16;
63 u16 rule = table & 0xffff;
64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
65
66 if (subtable && subtable < ARRAY_SIZE(act_type))
67 dev_warn(&adapter->ccw_device->dev,
68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
70 }
71
72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
74 {
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
77 "Access denied to port 0x%016Lx\n",
78 (unsigned long long)port->wwpn);
79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
81 zfcp_erp_port_access_denied(port, "fspad_1", req);
82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
83 }
84
85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
87 {
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97 }
98
99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
100 {
101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
105 }
106
107 /**
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
110 */
111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
112 {
113 if (likely(req->pool)) {
114 mempool_free(req, req->pool);
115 return;
116 }
117
118 if (req->qtcb) {
119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
120 return;
121 }
122 }
123
124 /**
125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
126 * @adapter: pointer to struct zfcp_adapter
127 *
128 * Never ever call this without shutting down the adapter first.
129 * Otherwise the adapter would continue using and corrupting s390 storage.
130 * Included BUG_ON() call to ensure this is done.
131 * ERP is supposed to be the only user of this function.
132 */
133 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
134 {
135 struct zfcp_fsf_req *req, *tmp;
136 unsigned long flags;
137 LIST_HEAD(remove_queue);
138 unsigned int i;
139
140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
141 spin_lock_irqsave(&adapter->req_list_lock, flags);
142 for (i = 0; i < REQUEST_LIST_SIZE; i++)
143 list_splice_init(&adapter->req_list[i], &remove_queue);
144 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
145
146 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
147 list_del(&req->list);
148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
149 zfcp_fsf_req_complete(req);
150 }
151 }
152
153 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
154 {
155 struct fsf_status_read_buffer *sr_buf = req->data;
156 struct zfcp_adapter *adapter = req->adapter;
157 struct zfcp_port *port;
158 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
159 unsigned long flags;
160
161 read_lock_irqsave(&zfcp_data.config_lock, flags);
162 list_for_each_entry(port, &adapter->port_list_head, list)
163 if (port->d_id == d_id) {
164 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
165 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
169 }
170
171 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
172 struct fsf_link_down_info *link_down)
173 {
174 struct zfcp_adapter *adapter = req->adapter;
175 unsigned long flags;
176
177 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
178 return;
179
180 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
181
182 read_lock_irqsave(&zfcp_data.config_lock, flags);
183 zfcp_scsi_schedule_rports_block(adapter);
184 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
185
186 if (!link_down)
187 goto out;
188
189 switch (link_down->error_code) {
190 case FSF_PSQ_LINK_NO_LIGHT:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "There is no light signal from the local "
193 "fibre channel cable\n");
194 break;
195 case FSF_PSQ_LINK_WRAP_PLUG:
196 dev_warn(&req->adapter->ccw_device->dev,
197 "There is a wrap plug instead of a fibre "
198 "channel cable\n");
199 break;
200 case FSF_PSQ_LINK_NO_FCP:
201 dev_warn(&req->adapter->ccw_device->dev,
202 "The adjacent fibre channel node does not "
203 "support FCP\n");
204 break;
205 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
206 dev_warn(&req->adapter->ccw_device->dev,
207 "The FCP device is suspended because of a "
208 "firmware update\n");
209 break;
210 case FSF_PSQ_LINK_INVALID_WWPN:
211 dev_warn(&req->adapter->ccw_device->dev,
212 "The FCP device detected a WWPN that is "
213 "duplicate or not valid\n");
214 break;
215 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
216 dev_warn(&req->adapter->ccw_device->dev,
217 "The fibre channel fabric does not support NPIV\n");
218 break;
219 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The FCP adapter cannot support more NPIV ports\n");
222 break;
223 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
224 dev_warn(&req->adapter->ccw_device->dev,
225 "The adjacent switch cannot support "
226 "more NPIV ports\n");
227 break;
228 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
229 dev_warn(&req->adapter->ccw_device->dev,
230 "The FCP adapter could not log in to the "
231 "fibre channel fabric\n");
232 break;
233 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
234 dev_warn(&req->adapter->ccw_device->dev,
235 "The WWPN assignment file on the FCP adapter "
236 "has been damaged\n");
237 break;
238 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
239 dev_warn(&req->adapter->ccw_device->dev,
240 "The mode table on the FCP adapter "
241 "has been damaged\n");
242 break;
243 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
244 dev_warn(&req->adapter->ccw_device->dev,
245 "All NPIV ports on the FCP adapter have "
246 "been assigned\n");
247 break;
248 default:
249 dev_warn(&req->adapter->ccw_device->dev,
250 "The link between the FCP adapter and "
251 "the FC fabric is down\n");
252 }
253 out:
254 zfcp_erp_adapter_failed(adapter, id, req);
255 }
256
257 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
258 {
259 struct fsf_status_read_buffer *sr_buf = req->data;
260 struct fsf_link_down_info *ldi =
261 (struct fsf_link_down_info *) &sr_buf->payload;
262
263 switch (sr_buf->status_subtype) {
264 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
265 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
266 break;
267 case FSF_STATUS_READ_SUB_FDISC_FAILED:
268 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
269 break;
270 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
271 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
272 };
273 }
274
275 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
276 {
277 struct zfcp_adapter *adapter = req->adapter;
278 struct fsf_status_read_buffer *sr_buf = req->data;
279
280 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
281 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
282 mempool_free(sr_buf, adapter->pool.data_status_read);
283 zfcp_fsf_req_free(req);
284 return;
285 }
286
287 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
288
289 switch (sr_buf->status_type) {
290 case FSF_STATUS_READ_PORT_CLOSED:
291 zfcp_fsf_status_read_port_closed(req);
292 break;
293 case FSF_STATUS_READ_INCOMING_ELS:
294 zfcp_fc_incoming_els(req);
295 break;
296 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
297 break;
298 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
299 dev_warn(&adapter->ccw_device->dev,
300 "The error threshold for checksum statistics "
301 "has been exceeded\n");
302 zfcp_hba_dbf_event_berr(adapter, req);
303 break;
304 case FSF_STATUS_READ_LINK_DOWN:
305 zfcp_fsf_status_read_link_down(req);
306 break;
307 case FSF_STATUS_READ_LINK_UP:
308 dev_info(&adapter->ccw_device->dev,
309 "The local link has been restored\n");
310 /* All ports should be marked as ready to run again */
311 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
312 ZFCP_STATUS_COMMON_RUNNING,
313 ZFCP_SET);
314 zfcp_erp_adapter_reopen(adapter,
315 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
316 ZFCP_STATUS_COMMON_ERP_FAILED,
317 "fssrh_2", req);
318 break;
319 case FSF_STATUS_READ_NOTIFICATION_LOST:
320 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
321 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
322 req);
323 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
324 schedule_work(&adapter->scan_work);
325 break;
326 case FSF_STATUS_READ_CFDC_UPDATED:
327 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
328 break;
329 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
330 adapter->adapter_features = sr_buf->payload.word[0];
331 break;
332 }
333
334 mempool_free(sr_buf, adapter->pool.data_status_read);
335 zfcp_fsf_req_free(req);
336
337 atomic_inc(&adapter->stat_miss);
338 queue_work(zfcp_data.work_queue, &adapter->stat_work);
339 }
340
341 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
342 {
343 switch (req->qtcb->header.fsf_status_qual.word[0]) {
344 case FSF_SQ_FCP_RSP_AVAILABLE:
345 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
346 case FSF_SQ_NO_RETRY_POSSIBLE:
347 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
348 return;
349 case FSF_SQ_COMMAND_ABORTED:
350 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
351 break;
352 case FSF_SQ_NO_RECOM:
353 dev_err(&req->adapter->ccw_device->dev,
354 "The FCP adapter reported a problem "
355 "that cannot be recovered\n");
356 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
357 break;
358 }
359 /* all non-return stats set FSFREQ_ERROR*/
360 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
361 }
362
363 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
364 {
365 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
366 return;
367
368 switch (req->qtcb->header.fsf_status) {
369 case FSF_UNKNOWN_COMMAND:
370 dev_err(&req->adapter->ccw_device->dev,
371 "The FCP adapter does not recognize the command 0x%x\n",
372 req->qtcb->header.fsf_command);
373 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
374 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 break;
376 case FSF_ADAPTER_STATUS_AVAILABLE:
377 zfcp_fsf_fsfstatus_qual_eval(req);
378 break;
379 }
380 }
381
382 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
383 {
384 struct zfcp_adapter *adapter = req->adapter;
385 struct fsf_qtcb *qtcb = req->qtcb;
386 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
387
388 zfcp_hba_dbf_event_fsf_response(req);
389
390 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
391 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
392 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
393 return;
394 }
395
396 switch (qtcb->prefix.prot_status) {
397 case FSF_PROT_GOOD:
398 case FSF_PROT_FSF_STATUS_PRESENTED:
399 return;
400 case FSF_PROT_QTCB_VERSION_ERROR:
401 dev_err(&adapter->ccw_device->dev,
402 "QTCB version 0x%x not supported by FCP adapter "
403 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
404 psq->word[0], psq->word[1]);
405 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
406 break;
407 case FSF_PROT_ERROR_STATE:
408 case FSF_PROT_SEQ_NUMB_ERROR:
409 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
410 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
411 break;
412 case FSF_PROT_UNSUPP_QTCB_TYPE:
413 dev_err(&adapter->ccw_device->dev,
414 "The QTCB type is not supported by the FCP adapter\n");
415 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
416 break;
417 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
418 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
419 &adapter->status);
420 break;
421 case FSF_PROT_DUPLICATE_REQUEST_ID:
422 dev_err(&adapter->ccw_device->dev,
423 "0x%Lx is an ambiguous request identifier\n",
424 (unsigned long long)qtcb->bottom.support.req_handle);
425 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
426 break;
427 case FSF_PROT_LINK_DOWN:
428 zfcp_fsf_link_down_info_eval(req, "fspse_5",
429 &psq->link_down_info);
430 /* FIXME: reopening adapter now? better wait for link up */
431 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
432 break;
433 case FSF_PROT_REEST_QUEUE:
434 /* All ports should be marked as ready to run again */
435 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
436 ZFCP_STATUS_COMMON_RUNNING,
437 ZFCP_SET);
438 zfcp_erp_adapter_reopen(adapter,
439 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
440 ZFCP_STATUS_COMMON_ERP_FAILED,
441 "fspse_8", req);
442 break;
443 default:
444 dev_err(&adapter->ccw_device->dev,
445 "0x%x is not a valid transfer protocol status\n",
446 qtcb->prefix.prot_status);
447 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
448 }
449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
450 }
451
452 /**
453 * zfcp_fsf_req_complete - process completion of a FSF request
454 * @fsf_req: The FSF request that has been completed.
455 *
456 * When a request has been completed either from the FCP adapter,
457 * or it has been dismissed due to a queue shutdown, this function
458 * is called to process the completion status and trigger further
459 * events related to the FSF request.
460 */
461 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
462 {
463 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
464 zfcp_fsf_status_read_handler(req);
465 return;
466 }
467
468 del_timer(&req->timer);
469 zfcp_fsf_protstatus_eval(req);
470 zfcp_fsf_fsfstatus_eval(req);
471 req->handler(req);
472
473 if (req->erp_action)
474 zfcp_erp_notify(req->erp_action, 0);
475 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
476
477 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
478 zfcp_fsf_req_free(req);
479 else
480 /* notify initiator waiting for the requests completion */
481 /*
482 * FIXME: Race! We must not access fsf_req here as it might have been
483 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
484 * flag. It's an improbable case. But, we have the same paranoia for
485 * the cleanup flag already.
486 * Might better be handled using complete()?
487 * (setting the flag and doing wakeup ought to be atomic
488 * with regard to checking the flag as long as waitqueue is
489 * part of the to be released structure)
490 */
491 wake_up(&req->completion_wq);
492 }
493
494 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
495 {
496 struct fsf_qtcb_bottom_config *bottom;
497 struct zfcp_adapter *adapter = req->adapter;
498 struct Scsi_Host *shost = adapter->scsi_host;
499
500 bottom = &req->qtcb->bottom.config;
501
502 if (req->data)
503 memcpy(req->data, bottom, sizeof(*bottom));
504
505 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
506 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
507 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
508 fc_host_speed(shost) = bottom->fc_link_speed;
509 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
510
511 adapter->hydra_version = bottom->adapter_type;
512 adapter->timer_ticks = bottom->timer_interval;
513
514 if (fc_host_permanent_port_name(shost) == -1)
515 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
516
517 switch (bottom->fc_topology) {
518 case FSF_TOPO_P2P:
519 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
520 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
521 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
522 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
523 break;
524 case FSF_TOPO_FABRIC:
525 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
526 break;
527 case FSF_TOPO_AL:
528 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
529 /* fall through */
530 default:
531 dev_err(&adapter->ccw_device->dev,
532 "Unknown or unsupported arbitrated loop "
533 "fibre channel topology detected\n");
534 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
535 return -EIO;
536 }
537
538 return 0;
539 }
540
541 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
542 {
543 struct zfcp_adapter *adapter = req->adapter;
544 struct fsf_qtcb *qtcb = req->qtcb;
545 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
546 struct Scsi_Host *shost = adapter->scsi_host;
547
548 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
549 return;
550
551 adapter->fsf_lic_version = bottom->lic_version;
552 adapter->adapter_features = bottom->adapter_features;
553 adapter->connection_features = bottom->connection_features;
554 adapter->peer_wwpn = 0;
555 adapter->peer_wwnn = 0;
556 adapter->peer_d_id = 0;
557
558 switch (qtcb->header.fsf_status) {
559 case FSF_GOOD:
560 if (zfcp_fsf_exchange_config_evaluate(req))
561 return;
562
563 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
564 dev_err(&adapter->ccw_device->dev,
565 "FCP adapter maximum QTCB size (%d bytes) "
566 "is too small\n",
567 bottom->max_qtcb_size);
568 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
569 return;
570 }
571 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
572 &adapter->status);
573 break;
574 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
575 fc_host_node_name(shost) = 0;
576 fc_host_port_name(shost) = 0;
577 fc_host_port_id(shost) = 0;
578 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
579 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
580 adapter->hydra_version = 0;
581
582 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
583 &adapter->status);
584
585 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
586 &qtcb->header.fsf_status_qual.link_down_info);
587 break;
588 default:
589 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
590 return;
591 }
592
593 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
594 adapter->hardware_version = bottom->hardware_version;
595 memcpy(fc_host_serial_number(shost), bottom->serial_number,
596 min(FC_SERIAL_NUMBER_SIZE, 17));
597 EBCASC(fc_host_serial_number(shost),
598 min(FC_SERIAL_NUMBER_SIZE, 17));
599 }
600
601 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
602 dev_err(&adapter->ccw_device->dev,
603 "The FCP adapter only supports newer "
604 "control block versions\n");
605 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
606 return;
607 }
608 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
609 dev_err(&adapter->ccw_device->dev,
610 "The FCP adapter only supports older "
611 "control block versions\n");
612 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
613 }
614 }
615
616 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
617 {
618 struct zfcp_adapter *adapter = req->adapter;
619 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
620 struct Scsi_Host *shost = adapter->scsi_host;
621
622 if (req->data)
623 memcpy(req->data, bottom, sizeof(*bottom));
624
625 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
626 fc_host_permanent_port_name(shost) = bottom->wwpn;
627 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
628 } else
629 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
630 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
631 fc_host_supported_speeds(shost) = bottom->supported_speed;
632 }
633
634 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
635 {
636 struct fsf_qtcb *qtcb = req->qtcb;
637
638 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
639 return;
640
641 switch (qtcb->header.fsf_status) {
642 case FSF_GOOD:
643 zfcp_fsf_exchange_port_evaluate(req);
644 break;
645 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
646 zfcp_fsf_exchange_port_evaluate(req);
647 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
648 &qtcb->header.fsf_status_qual.link_down_info);
649 break;
650 }
651 }
652
653 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
654 {
655 struct zfcp_qdio_queue *req_q = &adapter->req_q;
656
657 spin_lock_bh(&adapter->req_q_lock);
658 if (atomic_read(&req_q->count))
659 return 1;
660 spin_unlock_bh(&adapter->req_q_lock);
661 return 0;
662 }
663
664 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
665 {
666 long ret;
667
668 spin_unlock_bh(&adapter->req_q_lock);
669 ret = wait_event_interruptible_timeout(adapter->request_wq,
670 zfcp_fsf_sbal_check(adapter), 5 * HZ);
671 if (ret > 0)
672 return 0;
673 if (!ret) {
674 atomic_inc(&adapter->qdio_outb_full);
675 /* assume hanging outbound queue, try queue recovery */
676 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
677 }
678
679 spin_lock_bh(&adapter->req_q_lock);
680 return -EIO;
681 }
682
683 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
684 {
685 struct zfcp_fsf_req *req;
686 req = mempool_alloc(pool, GFP_ATOMIC);
687 if (!req)
688 return NULL;
689 memset(req, 0, sizeof(*req));
690 req->pool = pool;
691 return req;
692 }
693
694 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
695 {
696 struct zfcp_fsf_req_qtcb *qtcb;
697
698 if (likely(pool))
699 qtcb = mempool_alloc(pool, GFP_ATOMIC);
700 else
701 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
702 GFP_ATOMIC);
703 if (unlikely(!qtcb))
704 return NULL;
705
706 memset(qtcb, 0, sizeof(*qtcb));
707 qtcb->fsf_req.qtcb = &qtcb->qtcb;
708 qtcb->fsf_req.pool = pool;
709
710 return &qtcb->fsf_req;
711 }
712
713 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
714 u32 fsf_cmd, int req_flags,
715 mempool_t *pool)
716 {
717 struct qdio_buffer_element *sbale;
718
719 struct zfcp_fsf_req *req;
720 struct zfcp_qdio_queue *req_q = &adapter->req_q;
721
722 if (req_flags & ZFCP_REQ_NO_QTCB)
723 req = zfcp_fsf_alloc_noqtcb(pool);
724 else
725 req = zfcp_fsf_alloc_qtcb(pool);
726
727 if (unlikely(!req))
728 return ERR_PTR(-ENOMEM);
729
730 if (adapter->req_no == 0)
731 adapter->req_no++;
732
733 INIT_LIST_HEAD(&req->list);
734 init_timer(&req->timer);
735 init_waitqueue_head(&req->completion_wq);
736
737 req->adapter = adapter;
738 req->fsf_command = fsf_cmd;
739 req->req_id = adapter->req_no;
740 req->sbal_number = 1;
741 req->sbal_first = req_q->first;
742 req->sbal_last = req_q->first;
743 req->sbale_curr = 1;
744
745 sbale = zfcp_qdio_sbale_req(req);
746 sbale[0].addr = (void *) req->req_id;
747 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
748
749 if (likely(req->qtcb)) {
750 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
751 req->qtcb->prefix.req_id = req->req_id;
752 req->qtcb->prefix.ulp_info = 26;
753 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
754 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
755 req->qtcb->header.req_handle = req->req_id;
756 req->qtcb->header.fsf_command = req->fsf_command;
757 req->seq_no = adapter->fsf_req_seq_no;
758 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
759 sbale[1].addr = (void *) req->qtcb;
760 sbale[1].length = sizeof(struct fsf_qtcb);
761 }
762
763 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
764 zfcp_fsf_req_free(req);
765 return ERR_PTR(-EIO);
766 }
767
768 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
769 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
770
771 return req;
772 }
773
774 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
775 {
776 struct zfcp_adapter *adapter = req->adapter;
777 unsigned long flags;
778 int idx;
779 int with_qtcb = (req->qtcb != NULL);
780
781 /* put allocated FSF request into hash table */
782 spin_lock_irqsave(&adapter->req_list_lock, flags);
783 idx = zfcp_reqlist_hash(req->req_id);
784 list_add_tail(&req->list, &adapter->req_list[idx]);
785 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
786
787 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
788 req->issued = get_clock();
789 if (zfcp_qdio_send(req)) {
790 del_timer(&req->timer);
791 spin_lock_irqsave(&adapter->req_list_lock, flags);
792 /* lookup request again, list might have changed */
793 if (zfcp_reqlist_find_safe(adapter, req))
794 zfcp_reqlist_remove(adapter, req);
795 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
796 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
797 return -EIO;
798 }
799
800 /* Don't increase for unsolicited status */
801 if (with_qtcb)
802 adapter->fsf_req_seq_no++;
803 adapter->req_no++;
804
805 return 0;
806 }
807
808 /**
809 * zfcp_fsf_status_read - send status read request
810 * @adapter: pointer to struct zfcp_adapter
811 * @req_flags: request flags
812 * Returns: 0 on success, ERROR otherwise
813 */
814 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
815 {
816 struct zfcp_fsf_req *req;
817 struct fsf_status_read_buffer *sr_buf;
818 struct qdio_buffer_element *sbale;
819 int retval = -EIO;
820
821 spin_lock_bh(&adapter->req_q_lock);
822 if (zfcp_fsf_req_sbal_get(adapter))
823 goto out;
824
825 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
826 ZFCP_REQ_NO_QTCB,
827 adapter->pool.fsf_req_status_read);
828 if (IS_ERR(req)) {
829 retval = PTR_ERR(req);
830 goto out;
831 }
832
833 sbale = zfcp_qdio_sbale_req(req);
834 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
835 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
836 req->sbale_curr = 2;
837
838 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
839 if (!sr_buf) {
840 retval = -ENOMEM;
841 goto failed_buf;
842 }
843 memset(sr_buf, 0, sizeof(*sr_buf));
844 req->data = sr_buf;
845 sbale = zfcp_qdio_sbale_curr(req);
846 sbale->addr = (void *) sr_buf;
847 sbale->length = sizeof(*sr_buf);
848
849 retval = zfcp_fsf_req_send(req);
850 if (retval)
851 goto failed_req_send;
852
853 goto out;
854
855 failed_req_send:
856 mempool_free(sr_buf, adapter->pool.data_status_read);
857 failed_buf:
858 zfcp_fsf_req_free(req);
859 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
860 out:
861 spin_unlock_bh(&adapter->req_q_lock);
862 return retval;
863 }
864
865 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
866 {
867 struct zfcp_unit *unit = req->data;
868 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
869
870 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
871 return;
872
873 switch (req->qtcb->header.fsf_status) {
874 case FSF_PORT_HANDLE_NOT_VALID:
875 if (fsq->word[0] == fsq->word[1]) {
876 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
877 "fsafch1", req);
878 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
879 }
880 break;
881 case FSF_LUN_HANDLE_NOT_VALID:
882 if (fsq->word[0] == fsq->word[1]) {
883 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
884 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
885 }
886 break;
887 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
888 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
889 break;
890 case FSF_PORT_BOXED:
891 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
892 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
893 ZFCP_STATUS_FSFREQ_RETRY;
894 break;
895 case FSF_LUN_BOXED:
896 zfcp_erp_unit_boxed(unit, "fsafch4", req);
897 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
898 ZFCP_STATUS_FSFREQ_RETRY;
899 break;
900 case FSF_ADAPTER_STATUS_AVAILABLE:
901 switch (fsq->word[0]) {
902 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
903 zfcp_test_link(unit->port);
904 /* fall through */
905 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
906 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
907 break;
908 }
909 break;
910 case FSF_GOOD:
911 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
912 break;
913 }
914 }
915
916 /**
917 * zfcp_fsf_abort_fcp_command - abort running SCSI command
918 * @old_req_id: unsigned long
919 * @unit: pointer to struct zfcp_unit
920 * Returns: pointer to struct zfcp_fsf_req
921 */
922
923 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
924 struct zfcp_unit *unit)
925 {
926 struct qdio_buffer_element *sbale;
927 struct zfcp_fsf_req *req = NULL;
928 struct zfcp_adapter *adapter = unit->port->adapter;
929
930 spin_lock_bh(&adapter->req_q_lock);
931 if (zfcp_fsf_req_sbal_get(adapter))
932 goto out;
933 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
934 0, adapter->pool.fsf_req_abort);
935 if (IS_ERR(req)) {
936 req = NULL;
937 goto out;
938 }
939
940 if (unlikely(!(atomic_read(&unit->status) &
941 ZFCP_STATUS_COMMON_UNBLOCKED)))
942 goto out_error_free;
943
944 sbale = zfcp_qdio_sbale_req(req);
945 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
946 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
947
948 req->data = unit;
949 req->handler = zfcp_fsf_abort_fcp_command_handler;
950 req->qtcb->header.lun_handle = unit->handle;
951 req->qtcb->header.port_handle = unit->port->handle;
952 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
953
954 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
955 if (!zfcp_fsf_req_send(req))
956 goto out;
957
958 out_error_free:
959 zfcp_fsf_req_free(req);
960 req = NULL;
961 out:
962 spin_unlock_bh(&adapter->req_q_lock);
963 return req;
964 }
965
966 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
967 {
968 struct zfcp_adapter *adapter = req->adapter;
969 struct zfcp_send_ct *send_ct = req->data;
970 struct fsf_qtcb_header *header = &req->qtcb->header;
971
972 send_ct->status = -EINVAL;
973
974 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
975 goto skip_fsfstatus;
976
977 switch (header->fsf_status) {
978 case FSF_GOOD:
979 zfcp_san_dbf_event_ct_response(req);
980 send_ct->status = 0;
981 break;
982 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
983 zfcp_fsf_class_not_supp(req);
984 break;
985 case FSF_ADAPTER_STATUS_AVAILABLE:
986 switch (header->fsf_status_qual.word[0]){
987 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
988 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
989 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
990 break;
991 }
992 break;
993 case FSF_ACCESS_DENIED:
994 break;
995 case FSF_PORT_BOXED:
996 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
997 ZFCP_STATUS_FSFREQ_RETRY;
998 break;
999 case FSF_PORT_HANDLE_NOT_VALID:
1000 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
1001 /* fall through */
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 void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1017 struct scatterlist *sg_req,
1018 struct scatterlist *sg_resp)
1019 {
1020 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1021 sbale[2].addr = sg_virt(sg_req);
1022 sbale[2].length = sg_req->length;
1023 sbale[3].addr = sg_virt(sg_resp);
1024 sbale[3].length = sg_resp->length;
1025 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1026 }
1027
1028 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1029 {
1030 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1031 }
1032
1033 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1034 struct scatterlist *sg_req,
1035 struct scatterlist *sg_resp,
1036 int max_sbals)
1037 {
1038 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1039 u32 feat = req->adapter->adapter_features;
1040 int bytes;
1041
1042 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1043 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1044 return -EOPNOTSUPP;
1045
1046 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1047 return 0;
1048 }
1049
1050 /* use single, unchained SBAL if it can hold the request */
1051 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1052 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1053 return 0;
1054 }
1055
1056 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1057 sg_req, max_sbals);
1058 if (bytes <= 0)
1059 return -EIO;
1060 req->qtcb->bottom.support.req_buf_length = bytes;
1061 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1062
1063 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1064 sg_resp, max_sbals);
1065 if (bytes <= 0)
1066 return -EIO;
1067 req->qtcb->bottom.support.resp_buf_length = bytes;
1068
1069 return 0;
1070 }
1071
1072 /**
1073 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1074 * @ct: pointer to struct zfcp_send_ct with data for request
1075 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1076 * @erp_action: if non-null the Generic Service request sent within ERP
1077 */
1078 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1079 struct zfcp_erp_action *erp_action)
1080 {
1081 struct zfcp_wka_port *wka_port = ct->wka_port;
1082 struct zfcp_adapter *adapter = wka_port->adapter;
1083 struct zfcp_fsf_req *req;
1084 int ret = -EIO;
1085
1086 spin_lock_bh(&adapter->req_q_lock);
1087 if (zfcp_fsf_req_sbal_get(adapter))
1088 goto out;
1089
1090 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1091 ZFCP_REQ_AUTO_CLEANUP, pool);
1092 if (IS_ERR(req)) {
1093 ret = PTR_ERR(req);
1094 goto out;
1095 }
1096
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->qtcb->bottom.support.service_class = FSF_CLASS_3;
1105 req->qtcb->bottom.support.timeout = ct->timeout;
1106 req->data = ct;
1107
1108 zfcp_san_dbf_event_ct_request(req);
1109
1110 if (erp_action) {
1111 erp_action->fsf_req = req;
1112 req->erp_action = erp_action;
1113 zfcp_fsf_start_erp_timer(req);
1114 } else
1115 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1116
1117 ret = zfcp_fsf_req_send(req);
1118 if (ret)
1119 goto failed_send;
1120
1121 goto out;
1122
1123 failed_send:
1124 zfcp_fsf_req_free(req);
1125 if (erp_action)
1126 erp_action->fsf_req = NULL;
1127 out:
1128 spin_unlock_bh(&adapter->req_q_lock);
1129 return ret;
1130 }
1131
1132 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1133 {
1134 struct zfcp_send_els *send_els = req->data;
1135 struct zfcp_port *port = send_els->port;
1136 struct fsf_qtcb_header *header = &req->qtcb->header;
1137
1138 send_els->status = -EINVAL;
1139
1140 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1141 goto skip_fsfstatus;
1142
1143 switch (header->fsf_status) {
1144 case FSF_GOOD:
1145 zfcp_san_dbf_event_els_response(req);
1146 send_els->status = 0;
1147 break;
1148 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1149 zfcp_fsf_class_not_supp(req);
1150 break;
1151 case FSF_ADAPTER_STATUS_AVAILABLE:
1152 switch (header->fsf_status_qual.word[0]){
1153 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1154 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1155 zfcp_test_link(port);
1156 /*fall through */
1157 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1158 case FSF_SQ_RETRY_IF_POSSIBLE:
1159 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1160 break;
1161 }
1162 break;
1163 case FSF_ELS_COMMAND_REJECTED:
1164 case FSF_PAYLOAD_SIZE_MISMATCH:
1165 case FSF_REQUEST_SIZE_TOO_LARGE:
1166 case FSF_RESPONSE_SIZE_TOO_LARGE:
1167 break;
1168 case FSF_ACCESS_DENIED:
1169 if (port)
1170 zfcp_fsf_access_denied_port(req, port);
1171 break;
1172 case FSF_SBAL_MISMATCH:
1173 /* should never occure, avoided in zfcp_fsf_send_els */
1174 /* fall through */
1175 default:
1176 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1177 break;
1178 }
1179 skip_fsfstatus:
1180 if (send_els->handler)
1181 send_els->handler(send_els->handler_data);
1182 }
1183
1184 /**
1185 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1186 * @els: pointer to struct zfcp_send_els with data for the command
1187 */
1188 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1189 {
1190 struct zfcp_fsf_req *req;
1191 struct zfcp_adapter *adapter = els->adapter;
1192 struct fsf_qtcb_bottom_support *bottom;
1193 int ret = -EIO;
1194
1195 spin_lock_bh(&adapter->req_q_lock);
1196 if (zfcp_fsf_req_sbal_get(adapter))
1197 goto out;
1198 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1199 ZFCP_REQ_AUTO_CLEANUP, NULL);
1200 if (IS_ERR(req)) {
1201 ret = PTR_ERR(req);
1202 goto out;
1203 }
1204
1205 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1206
1207 if (ret)
1208 goto failed_send;
1209
1210 bottom = &req->qtcb->bottom.support;
1211 req->handler = zfcp_fsf_send_els_handler;
1212 bottom->d_id = els->d_id;
1213 bottom->service_class = FSF_CLASS_3;
1214 bottom->timeout = 2 * R_A_TOV;
1215 req->data = els;
1216
1217 zfcp_san_dbf_event_els_request(req);
1218
1219 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1220 ret = zfcp_fsf_req_send(req);
1221 if (ret)
1222 goto failed_send;
1223
1224 goto out;
1225
1226 failed_send:
1227 zfcp_fsf_req_free(req);
1228 out:
1229 spin_unlock_bh(&adapter->req_q_lock);
1230 return ret;
1231 }
1232
1233 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1234 {
1235 struct qdio_buffer_element *sbale;
1236 struct zfcp_fsf_req *req;
1237 struct zfcp_adapter *adapter = erp_action->adapter;
1238 int retval = -EIO;
1239
1240 spin_lock_bh(&adapter->req_q_lock);
1241 if (zfcp_fsf_req_sbal_get(adapter))
1242 goto out;
1243 req = zfcp_fsf_req_create(adapter,
1244 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245 ZFCP_REQ_AUTO_CLEANUP,
1246 adapter->pool.fsf_req_erp);
1247 if (IS_ERR(req)) {
1248 retval = PTR_ERR(req);
1249 goto out;
1250 }
1251
1252 sbale = zfcp_qdio_sbale_req(req);
1253 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1254 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1255
1256 req->qtcb->bottom.config.feature_selection =
1257 FSF_FEATURE_CFDC |
1258 FSF_FEATURE_LUN_SHARING |
1259 FSF_FEATURE_NOTIFICATION_LOST |
1260 FSF_FEATURE_UPDATE_ALERT;
1261 req->erp_action = erp_action;
1262 req->handler = zfcp_fsf_exchange_config_data_handler;
1263 erp_action->fsf_req = req;
1264
1265 zfcp_fsf_start_erp_timer(req);
1266 retval = zfcp_fsf_req_send(req);
1267 if (retval) {
1268 zfcp_fsf_req_free(req);
1269 erp_action->fsf_req = NULL;
1270 }
1271 out:
1272 spin_unlock_bh(&adapter->req_q_lock);
1273 return retval;
1274 }
1275
1276 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1277 struct fsf_qtcb_bottom_config *data)
1278 {
1279 struct qdio_buffer_element *sbale;
1280 struct zfcp_fsf_req *req = NULL;
1281 int retval = -EIO;
1282
1283 spin_lock_bh(&adapter->req_q_lock);
1284 if (zfcp_fsf_req_sbal_get(adapter))
1285 goto out_unlock;
1286
1287 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1288 0, NULL);
1289 if (IS_ERR(req)) {
1290 retval = PTR_ERR(req);
1291 goto out_unlock;
1292 }
1293
1294 sbale = zfcp_qdio_sbale_req(req);
1295 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1296 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1297 req->handler = zfcp_fsf_exchange_config_data_handler;
1298
1299 req->qtcb->bottom.config.feature_selection =
1300 FSF_FEATURE_CFDC |
1301 FSF_FEATURE_LUN_SHARING |
1302 FSF_FEATURE_NOTIFICATION_LOST |
1303 FSF_FEATURE_UPDATE_ALERT;
1304
1305 if (data)
1306 req->data = data;
1307
1308 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1309 retval = zfcp_fsf_req_send(req);
1310 spin_unlock_bh(&adapter->req_q_lock);
1311 if (!retval)
1312 wait_event(req->completion_wq,
1313 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1314
1315 zfcp_fsf_req_free(req);
1316 return retval;
1317
1318 out_unlock:
1319 spin_unlock_bh(&adapter->req_q_lock);
1320 return retval;
1321 }
1322
1323 /**
1324 * zfcp_fsf_exchange_port_data - request information about local port
1325 * @erp_action: ERP action for the adapter for which port data is requested
1326 * Returns: 0 on success, error otherwise
1327 */
1328 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1329 {
1330 struct qdio_buffer_element *sbale;
1331 struct zfcp_fsf_req *req;
1332 struct zfcp_adapter *adapter = erp_action->adapter;
1333 int retval = -EIO;
1334
1335 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1336 return -EOPNOTSUPP;
1337
1338 spin_lock_bh(&adapter->req_q_lock);
1339 if (zfcp_fsf_req_sbal_get(adapter))
1340 goto out;
1341 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1342 ZFCP_REQ_AUTO_CLEANUP,
1343 adapter->pool.fsf_req_erp);
1344 if (IS_ERR(req)) {
1345 retval = PTR_ERR(req);
1346 goto out;
1347 }
1348
1349 sbale = zfcp_qdio_sbale_req(req);
1350 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1351 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1352
1353 req->handler = zfcp_fsf_exchange_port_data_handler;
1354 req->erp_action = erp_action;
1355 erp_action->fsf_req = req;
1356
1357 zfcp_fsf_start_erp_timer(req);
1358 retval = zfcp_fsf_req_send(req);
1359 if (retval) {
1360 zfcp_fsf_req_free(req);
1361 erp_action->fsf_req = NULL;
1362 }
1363 out:
1364 spin_unlock_bh(&adapter->req_q_lock);
1365 return retval;
1366 }
1367
1368 /**
1369 * zfcp_fsf_exchange_port_data_sync - request information about local port
1370 * @adapter: pointer to struct zfcp_adapter
1371 * @data: pointer to struct fsf_qtcb_bottom_port
1372 * Returns: 0 on success, error otherwise
1373 */
1374 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1375 struct fsf_qtcb_bottom_port *data)
1376 {
1377 struct qdio_buffer_element *sbale;
1378 struct zfcp_fsf_req *req = NULL;
1379 int retval = -EIO;
1380
1381 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1382 return -EOPNOTSUPP;
1383
1384 spin_lock_bh(&adapter->req_q_lock);
1385 if (zfcp_fsf_req_sbal_get(adapter))
1386 goto out_unlock;
1387
1388 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1389 NULL);
1390 if (IS_ERR(req)) {
1391 retval = PTR_ERR(req);
1392 goto out_unlock;
1393 }
1394
1395 if (data)
1396 req->data = data;
1397
1398 sbale = zfcp_qdio_sbale_req(req);
1399 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1400 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1401
1402 req->handler = zfcp_fsf_exchange_port_data_handler;
1403 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1404 retval = zfcp_fsf_req_send(req);
1405 spin_unlock_bh(&adapter->req_q_lock);
1406
1407 if (!retval)
1408 wait_event(req->completion_wq,
1409 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1410 zfcp_fsf_req_free(req);
1411
1412 return retval;
1413
1414 out_unlock:
1415 spin_unlock_bh(&adapter->req_q_lock);
1416 return retval;
1417 }
1418
1419 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1420 {
1421 struct zfcp_port *port = req->data;
1422 struct fsf_qtcb_header *header = &req->qtcb->header;
1423 struct fsf_plogi *plogi;
1424
1425 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1426 goto out;
1427
1428 switch (header->fsf_status) {
1429 case FSF_PORT_ALREADY_OPEN:
1430 break;
1431 case FSF_ACCESS_DENIED:
1432 zfcp_fsf_access_denied_port(req, port);
1433 break;
1434 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1435 dev_warn(&req->adapter->ccw_device->dev,
1436 "Not enough FCP adapter resources to open "
1437 "remote port 0x%016Lx\n",
1438 (unsigned long long)port->wwpn);
1439 zfcp_erp_port_failed(port, "fsoph_1", req);
1440 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1441 break;
1442 case FSF_ADAPTER_STATUS_AVAILABLE:
1443 switch (header->fsf_status_qual.word[0]) {
1444 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1445 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1446 case FSF_SQ_NO_RETRY_POSSIBLE:
1447 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1448 break;
1449 }
1450 break;
1451 case FSF_GOOD:
1452 port->handle = header->port_handle;
1453 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1454 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1455 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1456 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1457 &port->status);
1458 /* check whether D_ID has changed during open */
1459 /*
1460 * FIXME: This check is not airtight, as the FCP channel does
1461 * not monitor closures of target port connections caused on
1462 * the remote side. Thus, they might miss out on invalidating
1463 * locally cached WWPNs (and other N_Port parameters) of gone
1464 * target ports. So, our heroic attempt to make things safe
1465 * could be undermined by 'open port' response data tagged with
1466 * obsolete WWPNs. Another reason to monitor potential
1467 * connection closures ourself at least (by interpreting
1468 * incoming ELS' and unsolicited status). It just crosses my
1469 * mind that one should be able to cross-check by means of
1470 * another GID_PN straight after a port has been opened.
1471 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1472 */
1473 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1474 if (req->qtcb->bottom.support.els1_length >=
1475 FSF_PLOGI_MIN_LEN) {
1476 if (plogi->serv_param.wwpn != port->wwpn)
1477 port->d_id = 0;
1478 else {
1479 port->wwnn = plogi->serv_param.wwnn;
1480 zfcp_fc_plogi_evaluate(port, plogi);
1481 }
1482 }
1483 break;
1484 case FSF_UNKNOWN_OP_SUBTYPE:
1485 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1486 break;
1487 }
1488
1489 out:
1490 zfcp_port_put(port);
1491 }
1492
1493 /**
1494 * zfcp_fsf_open_port - create and send open port request
1495 * @erp_action: pointer to struct zfcp_erp_action
1496 * Returns: 0 on success, error otherwise
1497 */
1498 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1499 {
1500 struct qdio_buffer_element *sbale;
1501 struct zfcp_adapter *adapter = erp_action->adapter;
1502 struct zfcp_fsf_req *req;
1503 struct zfcp_port *port = erp_action->port;
1504 int retval = -EIO;
1505
1506 spin_lock_bh(&adapter->req_q_lock);
1507 if (zfcp_fsf_req_sbal_get(adapter))
1508 goto out;
1509
1510 req = zfcp_fsf_req_create(adapter,
1511 FSF_QTCB_OPEN_PORT_WITH_DID,
1512 ZFCP_REQ_AUTO_CLEANUP,
1513 adapter->pool.fsf_req_erp);
1514 if (IS_ERR(req)) {
1515 retval = PTR_ERR(req);
1516 goto out;
1517 }
1518
1519 sbale = zfcp_qdio_sbale_req(req);
1520 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1521 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1522
1523 req->handler = zfcp_fsf_open_port_handler;
1524 req->qtcb->bottom.support.d_id = port->d_id;
1525 req->data = port;
1526 req->erp_action = erp_action;
1527 erp_action->fsf_req = req;
1528 zfcp_port_get(port);
1529
1530 zfcp_fsf_start_erp_timer(req);
1531 retval = zfcp_fsf_req_send(req);
1532 if (retval) {
1533 zfcp_fsf_req_free(req);
1534 erp_action->fsf_req = NULL;
1535 zfcp_port_put(port);
1536 }
1537 out:
1538 spin_unlock_bh(&adapter->req_q_lock);
1539 return retval;
1540 }
1541
1542 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1543 {
1544 struct zfcp_port *port = req->data;
1545
1546 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1547 return;
1548
1549 switch (req->qtcb->header.fsf_status) {
1550 case FSF_PORT_HANDLE_NOT_VALID:
1551 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1552 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1553 break;
1554 case FSF_ADAPTER_STATUS_AVAILABLE:
1555 break;
1556 case FSF_GOOD:
1557 zfcp_erp_modify_port_status(port, "fscph_2", req,
1558 ZFCP_STATUS_COMMON_OPEN,
1559 ZFCP_CLEAR);
1560 break;
1561 }
1562 }
1563
1564 /**
1565 * zfcp_fsf_close_port - create and send close port request
1566 * @erp_action: pointer to struct zfcp_erp_action
1567 * Returns: 0 on success, error otherwise
1568 */
1569 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1570 {
1571 struct qdio_buffer_element *sbale;
1572 struct zfcp_adapter *adapter = erp_action->adapter;
1573 struct zfcp_fsf_req *req;
1574 int retval = -EIO;
1575
1576 spin_lock_bh(&adapter->req_q_lock);
1577 if (zfcp_fsf_req_sbal_get(adapter))
1578 goto out;
1579
1580 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1581 ZFCP_REQ_AUTO_CLEANUP,
1582 adapter->pool.fsf_req_erp);
1583 if (IS_ERR(req)) {
1584 retval = PTR_ERR(req);
1585 goto out;
1586 }
1587
1588 sbale = zfcp_qdio_sbale_req(req);
1589 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1590 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1591
1592 req->handler = zfcp_fsf_close_port_handler;
1593 req->data = erp_action->port;
1594 req->erp_action = erp_action;
1595 req->qtcb->header.port_handle = erp_action->port->handle;
1596 erp_action->fsf_req = req;
1597
1598 zfcp_fsf_start_erp_timer(req);
1599 retval = zfcp_fsf_req_send(req);
1600 if (retval) {
1601 zfcp_fsf_req_free(req);
1602 erp_action->fsf_req = NULL;
1603 }
1604 out:
1605 spin_unlock_bh(&adapter->req_q_lock);
1606 return retval;
1607 }
1608
1609 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1610 {
1611 struct zfcp_wka_port *wka_port = req->data;
1612 struct fsf_qtcb_header *header = &req->qtcb->header;
1613
1614 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1615 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1616 goto out;
1617 }
1618
1619 switch (header->fsf_status) {
1620 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1621 dev_warn(&req->adapter->ccw_device->dev,
1622 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1623 /* fall through */
1624 case FSF_ADAPTER_STATUS_AVAILABLE:
1625 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1626 /* fall through */
1627 case FSF_ACCESS_DENIED:
1628 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1629 break;
1630 case FSF_GOOD:
1631 wka_port->handle = header->port_handle;
1632 /* fall through */
1633 case FSF_PORT_ALREADY_OPEN:
1634 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1635 }
1636 out:
1637 wake_up(&wka_port->completion_wq);
1638 }
1639
1640 /**
1641 * zfcp_fsf_open_wka_port - create and send open wka-port request
1642 * @wka_port: pointer to struct zfcp_wka_port
1643 * Returns: 0 on success, error otherwise
1644 */
1645 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1646 {
1647 struct qdio_buffer_element *sbale;
1648 struct zfcp_adapter *adapter = wka_port->adapter;
1649 struct zfcp_fsf_req *req;
1650 int retval = -EIO;
1651
1652 spin_lock_bh(&adapter->req_q_lock);
1653 if (zfcp_fsf_req_sbal_get(adapter))
1654 goto out;
1655
1656 req = zfcp_fsf_req_create(adapter,
1657 FSF_QTCB_OPEN_PORT_WITH_DID,
1658 ZFCP_REQ_AUTO_CLEANUP,
1659 adapter->pool.fsf_req_erp);
1660 if (unlikely(IS_ERR(req))) {
1661 retval = PTR_ERR(req);
1662 goto out;
1663 }
1664
1665 sbale = zfcp_qdio_sbale_req(req);
1666 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1667 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1668
1669 req->handler = zfcp_fsf_open_wka_port_handler;
1670 req->qtcb->bottom.support.d_id = wka_port->d_id;
1671 req->data = wka_port;
1672
1673 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1674 retval = zfcp_fsf_req_send(req);
1675 if (retval)
1676 zfcp_fsf_req_free(req);
1677 out:
1678 spin_unlock_bh(&adapter->req_q_lock);
1679 return retval;
1680 }
1681
1682 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1683 {
1684 struct zfcp_wka_port *wka_port = req->data;
1685
1686 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1687 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1688 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1689 }
1690
1691 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1692 wake_up(&wka_port->completion_wq);
1693 }
1694
1695 /**
1696 * zfcp_fsf_close_wka_port - create and send close wka port request
1697 * @erp_action: pointer to struct zfcp_erp_action
1698 * Returns: 0 on success, error otherwise
1699 */
1700 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1701 {
1702 struct qdio_buffer_element *sbale;
1703 struct zfcp_adapter *adapter = wka_port->adapter;
1704 struct zfcp_fsf_req *req;
1705 int retval = -EIO;
1706
1707 spin_lock_bh(&adapter->req_q_lock);
1708 if (zfcp_fsf_req_sbal_get(adapter))
1709 goto out;
1710
1711 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1712 ZFCP_REQ_AUTO_CLEANUP,
1713 adapter->pool.fsf_req_erp);
1714 if (unlikely(IS_ERR(req))) {
1715 retval = PTR_ERR(req);
1716 goto out;
1717 }
1718
1719 sbale = zfcp_qdio_sbale_req(req);
1720 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1721 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1722
1723 req->handler = zfcp_fsf_close_wka_port_handler;
1724 req->data = wka_port;
1725 req->qtcb->header.port_handle = wka_port->handle;
1726
1727 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1728 retval = zfcp_fsf_req_send(req);
1729 if (retval)
1730 zfcp_fsf_req_free(req);
1731 out:
1732 spin_unlock_bh(&adapter->req_q_lock);
1733 return retval;
1734 }
1735
1736 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1737 {
1738 struct zfcp_port *port = req->data;
1739 struct fsf_qtcb_header *header = &req->qtcb->header;
1740 struct zfcp_unit *unit;
1741
1742 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1743 return;
1744
1745 switch (header->fsf_status) {
1746 case FSF_PORT_HANDLE_NOT_VALID:
1747 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1748 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1749 break;
1750 case FSF_ACCESS_DENIED:
1751 zfcp_fsf_access_denied_port(req, port);
1752 break;
1753 case FSF_PORT_BOXED:
1754 /* can't use generic zfcp_erp_modify_port_status because
1755 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1756 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1757 list_for_each_entry(unit, &port->unit_list_head, list)
1758 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1759 &unit->status);
1760 zfcp_erp_port_boxed(port, "fscpph2", req);
1761 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1762 ZFCP_STATUS_FSFREQ_RETRY;
1763
1764 break;
1765 case FSF_ADAPTER_STATUS_AVAILABLE:
1766 switch (header->fsf_status_qual.word[0]) {
1767 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1768 /* fall through */
1769 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1770 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1771 break;
1772 }
1773 break;
1774 case FSF_GOOD:
1775 /* can't use generic zfcp_erp_modify_port_status because
1776 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1777 */
1778 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1779 list_for_each_entry(unit, &port->unit_list_head, list)
1780 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1781 &unit->status);
1782 break;
1783 }
1784 }
1785
1786 /**
1787 * zfcp_fsf_close_physical_port - close physical port
1788 * @erp_action: pointer to struct zfcp_erp_action
1789 * Returns: 0 on success
1790 */
1791 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1792 {
1793 struct qdio_buffer_element *sbale;
1794 struct zfcp_adapter *adapter = erp_action->adapter;
1795 struct zfcp_fsf_req *req;
1796 int retval = -EIO;
1797
1798 spin_lock_bh(&adapter->req_q_lock);
1799 if (zfcp_fsf_req_sbal_get(adapter))
1800 goto out;
1801
1802 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1803 ZFCP_REQ_AUTO_CLEANUP,
1804 adapter->pool.fsf_req_erp);
1805 if (IS_ERR(req)) {
1806 retval = PTR_ERR(req);
1807 goto out;
1808 }
1809
1810 sbale = zfcp_qdio_sbale_req(req);
1811 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1812 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1813
1814 req->data = erp_action->port;
1815 req->qtcb->header.port_handle = erp_action->port->handle;
1816 req->erp_action = erp_action;
1817 req->handler = zfcp_fsf_close_physical_port_handler;
1818 erp_action->fsf_req = req;
1819
1820 zfcp_fsf_start_erp_timer(req);
1821 retval = zfcp_fsf_req_send(req);
1822 if (retval) {
1823 zfcp_fsf_req_free(req);
1824 erp_action->fsf_req = NULL;
1825 }
1826 out:
1827 spin_unlock_bh(&adapter->req_q_lock);
1828 return retval;
1829 }
1830
1831 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1832 {
1833 struct zfcp_adapter *adapter = req->adapter;
1834 struct zfcp_unit *unit = req->data;
1835 struct fsf_qtcb_header *header = &req->qtcb->header;
1836 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1837 struct fsf_queue_designator *queue_designator =
1838 &header->fsf_status_qual.fsf_queue_designator;
1839 int exclusive, readwrite;
1840
1841 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1842 return;
1843
1844 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1845 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1846 ZFCP_STATUS_UNIT_SHARED |
1847 ZFCP_STATUS_UNIT_READONLY,
1848 &unit->status);
1849
1850 switch (header->fsf_status) {
1851
1852 case FSF_PORT_HANDLE_NOT_VALID:
1853 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1854 /* fall through */
1855 case FSF_LUN_ALREADY_OPEN:
1856 break;
1857 case FSF_ACCESS_DENIED:
1858 zfcp_fsf_access_denied_unit(req, unit);
1859 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1860 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1861 break;
1862 case FSF_PORT_BOXED:
1863 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1864 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1865 ZFCP_STATUS_FSFREQ_RETRY;
1866 break;
1867 case FSF_LUN_SHARING_VIOLATION:
1868 if (header->fsf_status_qual.word[0])
1869 dev_warn(&adapter->ccw_device->dev,
1870 "LUN 0x%Lx on port 0x%Lx is already in "
1871 "use by CSS%d, MIF Image ID %x\n",
1872 (unsigned long long)unit->fcp_lun,
1873 (unsigned long long)unit->port->wwpn,
1874 queue_designator->cssid,
1875 queue_designator->hla);
1876 else
1877 zfcp_act_eval_err(adapter,
1878 header->fsf_status_qual.word[2]);
1879 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1880 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1881 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1882 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1883 break;
1884 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1885 dev_warn(&adapter->ccw_device->dev,
1886 "No handle is available for LUN "
1887 "0x%016Lx on port 0x%016Lx\n",
1888 (unsigned long long)unit->fcp_lun,
1889 (unsigned long long)unit->port->wwpn);
1890 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1891 /* fall through */
1892 case FSF_INVALID_COMMAND_OPTION:
1893 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894 break;
1895 case FSF_ADAPTER_STATUS_AVAILABLE:
1896 switch (header->fsf_status_qual.word[0]) {
1897 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1898 zfcp_test_link(unit->port);
1899 /* fall through */
1900 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902 break;
1903 }
1904 break;
1905
1906 case FSF_GOOD:
1907 unit->handle = header->lun_handle;
1908 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1909
1910 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1911 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1912 !zfcp_ccw_priv_sch(adapter)) {
1913 exclusive = (bottom->lun_access_info &
1914 FSF_UNIT_ACCESS_EXCLUSIVE);
1915 readwrite = (bottom->lun_access_info &
1916 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1917
1918 if (!exclusive)
1919 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1920 &unit->status);
1921
1922 if (!readwrite) {
1923 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1924 &unit->status);
1925 dev_info(&adapter->ccw_device->dev,
1926 "SCSI device at LUN 0x%016Lx on port "
1927 "0x%016Lx opened read-only\n",
1928 (unsigned long long)unit->fcp_lun,
1929 (unsigned long long)unit->port->wwpn);
1930 }
1931
1932 if (exclusive && !readwrite) {
1933 dev_err(&adapter->ccw_device->dev,
1934 "Exclusive read-only access not "
1935 "supported (unit 0x%016Lx, "
1936 "port 0x%016Lx)\n",
1937 (unsigned long long)unit->fcp_lun,
1938 (unsigned long long)unit->port->wwpn);
1939 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1940 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1941 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1942 } else if (!exclusive && readwrite) {
1943 dev_err(&adapter->ccw_device->dev,
1944 "Shared read-write access not "
1945 "supported (unit 0x%016Lx, port "
1946 "0x%016Lx)\n",
1947 (unsigned long long)unit->fcp_lun,
1948 (unsigned long long)unit->port->wwpn);
1949 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1950 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1951 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1952 }
1953 }
1954 break;
1955 }
1956 }
1957
1958 /**
1959 * zfcp_fsf_open_unit - open unit
1960 * @erp_action: pointer to struct zfcp_erp_action
1961 * Returns: 0 on success, error otherwise
1962 */
1963 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1964 {
1965 struct qdio_buffer_element *sbale;
1966 struct zfcp_adapter *adapter = erp_action->adapter;
1967 struct zfcp_fsf_req *req;
1968 int retval = -EIO;
1969
1970 spin_lock_bh(&adapter->req_q_lock);
1971 if (zfcp_fsf_req_sbal_get(adapter))
1972 goto out;
1973
1974 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1975 ZFCP_REQ_AUTO_CLEANUP,
1976 adapter->pool.fsf_req_erp);
1977 if (IS_ERR(req)) {
1978 retval = PTR_ERR(req);
1979 goto out;
1980 }
1981
1982 sbale = zfcp_qdio_sbale_req(req);
1983 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1984 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1985
1986 req->qtcb->header.port_handle = erp_action->port->handle;
1987 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1988 req->handler = zfcp_fsf_open_unit_handler;
1989 req->data = erp_action->unit;
1990 req->erp_action = erp_action;
1991 erp_action->fsf_req = req;
1992
1993 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1994 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1995
1996 zfcp_fsf_start_erp_timer(req);
1997 retval = zfcp_fsf_req_send(req);
1998 if (retval) {
1999 zfcp_fsf_req_free(req);
2000 erp_action->fsf_req = NULL;
2001 }
2002 out:
2003 spin_unlock_bh(&adapter->req_q_lock);
2004 return retval;
2005 }
2006
2007 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2008 {
2009 struct zfcp_unit *unit = req->data;
2010
2011 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2012 return;
2013
2014 switch (req->qtcb->header.fsf_status) {
2015 case FSF_PORT_HANDLE_NOT_VALID:
2016 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2017 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2018 break;
2019 case FSF_LUN_HANDLE_NOT_VALID:
2020 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2021 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2022 break;
2023 case FSF_PORT_BOXED:
2024 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2025 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2026 ZFCP_STATUS_FSFREQ_RETRY;
2027 break;
2028 case FSF_ADAPTER_STATUS_AVAILABLE:
2029 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2030 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2031 zfcp_test_link(unit->port);
2032 /* fall through */
2033 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2034 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2035 break;
2036 }
2037 break;
2038 case FSF_GOOD:
2039 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2040 break;
2041 }
2042 }
2043
2044 /**
2045 * zfcp_fsf_close_unit - close zfcp unit
2046 * @erp_action: pointer to struct zfcp_unit
2047 * Returns: 0 on success, error otherwise
2048 */
2049 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2050 {
2051 struct qdio_buffer_element *sbale;
2052 struct zfcp_adapter *adapter = erp_action->adapter;
2053 struct zfcp_fsf_req *req;
2054 int retval = -EIO;
2055
2056 spin_lock_bh(&adapter->req_q_lock);
2057 if (zfcp_fsf_req_sbal_get(adapter))
2058 goto out;
2059 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2060 ZFCP_REQ_AUTO_CLEANUP,
2061 adapter->pool.fsf_req_erp);
2062 if (IS_ERR(req)) {
2063 retval = PTR_ERR(req);
2064 goto out;
2065 }
2066
2067 sbale = zfcp_qdio_sbale_req(req);
2068 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2069 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2070
2071 req->qtcb->header.port_handle = erp_action->port->handle;
2072 req->qtcb->header.lun_handle = erp_action->unit->handle;
2073 req->handler = zfcp_fsf_close_unit_handler;
2074 req->data = erp_action->unit;
2075 req->erp_action = erp_action;
2076 erp_action->fsf_req = req;
2077
2078 zfcp_fsf_start_erp_timer(req);
2079 retval = zfcp_fsf_req_send(req);
2080 if (retval) {
2081 zfcp_fsf_req_free(req);
2082 erp_action->fsf_req = NULL;
2083 }
2084 out:
2085 spin_unlock_bh(&adapter->req_q_lock);
2086 return retval;
2087 }
2088
2089 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2090 {
2091 lat_rec->sum += lat;
2092 lat_rec->min = min(lat_rec->min, lat);
2093 lat_rec->max = max(lat_rec->max, lat);
2094 }
2095
2096 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2097 {
2098 struct fsf_qual_latency_info *lat_inf;
2099 struct latency_cont *lat;
2100 struct zfcp_unit *unit = req->unit;
2101
2102 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2103
2104 switch (req->qtcb->bottom.io.data_direction) {
2105 case FSF_DATADIR_READ:
2106 lat = &unit->latencies.read;
2107 break;
2108 case FSF_DATADIR_WRITE:
2109 lat = &unit->latencies.write;
2110 break;
2111 case FSF_DATADIR_CMND:
2112 lat = &unit->latencies.cmd;
2113 break;
2114 default:
2115 return;
2116 }
2117
2118 spin_lock(&unit->latencies.lock);
2119 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2120 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2121 lat->counter++;
2122 spin_unlock(&unit->latencies.lock);
2123 }
2124
2125 #ifdef CONFIG_BLK_DEV_IO_TRACE
2126 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2127 {
2128 struct fsf_qual_latency_info *lat_inf;
2129 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2130 struct request *req = scsi_cmnd->request;
2131 struct zfcp_blk_drv_data trace;
2132 int ticks = fsf_req->adapter->timer_ticks;
2133
2134 trace.flags = 0;
2135 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2136 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2137 trace.flags |= ZFCP_BLK_LAT_VALID;
2138 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2139 trace.channel_lat = lat_inf->channel_lat * ticks;
2140 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2141 }
2142 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2143 trace.flags |= ZFCP_BLK_REQ_ERROR;
2144 trace.inb_usage = fsf_req->qdio_inb_usage;
2145 trace.outb_usage = fsf_req->qdio_outb_usage;
2146
2147 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2148 }
2149 #else
2150 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2151 {
2152 }
2153 #endif
2154
2155 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2156 {
2157 struct scsi_cmnd *scpnt;
2158 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2159 &(req->qtcb->bottom.io.fcp_rsp);
2160 u32 sns_len;
2161 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2162 unsigned long flags;
2163
2164 read_lock_irqsave(&req->adapter->abort_lock, flags);
2165
2166 scpnt = req->data;
2167 if (unlikely(!scpnt)) {
2168 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2169 return;
2170 }
2171
2172 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2173 set_host_byte(scpnt, DID_SOFT_ERROR);
2174 goto skip_fsfstatus;
2175 }
2176
2177 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2178 set_host_byte(scpnt, DID_ERROR);
2179 goto skip_fsfstatus;
2180 }
2181
2182 set_msg_byte(scpnt, COMMAND_COMPLETE);
2183
2184 scpnt->result |= fcp_rsp_iu->scsi_status;
2185
2186 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2187 zfcp_fsf_req_latency(req);
2188
2189 zfcp_fsf_trace_latency(req);
2190
2191 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2192 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2193 set_host_byte(scpnt, DID_OK);
2194 else {
2195 set_host_byte(scpnt, DID_ERROR);
2196 goto skip_fsfstatus;
2197 }
2198 }
2199
2200 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2201 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2202 fcp_rsp_iu->fcp_rsp_len;
2203 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2204 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2205
2206 memcpy(scpnt->sense_buffer,
2207 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2208 }
2209
2210 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2211 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2212 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2213 scpnt->underflow)
2214 set_host_byte(scpnt, DID_ERROR);
2215 }
2216 skip_fsfstatus:
2217 if (scpnt->result != 0)
2218 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2219 else if (scpnt->retries > 0)
2220 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2221 else
2222 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2223
2224 scpnt->host_scribble = NULL;
2225 (scpnt->scsi_done) (scpnt);
2226 /*
2227 * We must hold this lock until scsi_done has been called.
2228 * Otherwise we may call scsi_done after abort regarding this
2229 * command has completed.
2230 * Note: scsi_done must not block!
2231 */
2232 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2233 }
2234
2235 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2236 {
2237 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2238 &(req->qtcb->bottom.io.fcp_rsp);
2239 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2240
2241 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2242 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2243 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2244 }
2245
2246
2247 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2248 {
2249 struct zfcp_unit *unit;
2250 struct fsf_qtcb_header *header = &req->qtcb->header;
2251
2252 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2253 unit = req->data;
2254 else
2255 unit = req->unit;
2256
2257 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2258 goto skip_fsfstatus;
2259
2260 switch (header->fsf_status) {
2261 case FSF_HANDLE_MISMATCH:
2262 case FSF_PORT_HANDLE_NOT_VALID:
2263 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2264 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2265 break;
2266 case FSF_FCPLUN_NOT_VALID:
2267 case FSF_LUN_HANDLE_NOT_VALID:
2268 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2269 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2270 break;
2271 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2272 zfcp_fsf_class_not_supp(req);
2273 break;
2274 case FSF_ACCESS_DENIED:
2275 zfcp_fsf_access_denied_unit(req, unit);
2276 break;
2277 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2278 dev_err(&req->adapter->ccw_device->dev,
2279 "Incorrect direction %d, unit 0x%016Lx on port "
2280 "0x%016Lx closed\n",
2281 req->qtcb->bottom.io.data_direction,
2282 (unsigned long long)unit->fcp_lun,
2283 (unsigned long long)unit->port->wwpn);
2284 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2285 req);
2286 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2287 break;
2288 case FSF_CMND_LENGTH_NOT_VALID:
2289 dev_err(&req->adapter->ccw_device->dev,
2290 "Incorrect CDB length %d, unit 0x%016Lx on "
2291 "port 0x%016Lx closed\n",
2292 req->qtcb->bottom.io.fcp_cmnd_length,
2293 (unsigned long long)unit->fcp_lun,
2294 (unsigned long long)unit->port->wwpn);
2295 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2296 req);
2297 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2298 break;
2299 case FSF_PORT_BOXED:
2300 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2301 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2302 ZFCP_STATUS_FSFREQ_RETRY;
2303 break;
2304 case FSF_LUN_BOXED:
2305 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2306 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2307 ZFCP_STATUS_FSFREQ_RETRY;
2308 break;
2309 case FSF_ADAPTER_STATUS_AVAILABLE:
2310 if (header->fsf_status_qual.word[0] ==
2311 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2312 zfcp_test_link(unit->port);
2313 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2314 break;
2315 }
2316 skip_fsfstatus:
2317 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2318 zfcp_fsf_send_fcp_ctm_handler(req);
2319 else {
2320 zfcp_fsf_send_fcp_command_task_handler(req);
2321 req->unit = NULL;
2322 zfcp_unit_put(unit);
2323 }
2324 }
2325
2326 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2327 {
2328 u32 *fcp_dl_ptr;
2329
2330 /*
2331 * fcp_dl_addr = start address of fcp_cmnd structure +
2332 * size of fixed part + size of dynamically sized add_dcp_cdb field
2333 * SEE FCP-2 documentation
2334 */
2335 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2336 (fcp_cmd->add_fcp_cdb_length << 2));
2337 *fcp_dl_ptr = fcp_dl;
2338 }
2339
2340 /**
2341 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2342 * @unit: unit where command is sent to
2343 * @scsi_cmnd: scsi command to be sent
2344 */
2345 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2346 struct scsi_cmnd *scsi_cmnd)
2347 {
2348 struct zfcp_fsf_req *req;
2349 struct fcp_cmnd_iu *fcp_cmnd_iu;
2350 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2351 int real_bytes, retval = -EIO;
2352 struct zfcp_adapter *adapter = unit->port->adapter;
2353
2354 if (unlikely(!(atomic_read(&unit->status) &
2355 ZFCP_STATUS_COMMON_UNBLOCKED)))
2356 return -EBUSY;
2357
2358 spin_lock(&adapter->req_q_lock);
2359 if (atomic_read(&adapter->req_q.count) <= 0) {
2360 atomic_inc(&adapter->qdio_outb_full);
2361 goto out;
2362 }
2363 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2364 ZFCP_REQ_AUTO_CLEANUP,
2365 adapter->pool.fsf_req_scsi);
2366 if (IS_ERR(req)) {
2367 retval = PTR_ERR(req);
2368 goto out;
2369 }
2370
2371 zfcp_unit_get(unit);
2372 req->unit = unit;
2373 req->data = scsi_cmnd;
2374 req->handler = zfcp_fsf_send_fcp_command_handler;
2375 req->qtcb->header.lun_handle = unit->handle;
2376 req->qtcb->header.port_handle = unit->port->handle;
2377 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2378
2379 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2380
2381 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2382 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2383 /*
2384 * set depending on data direction:
2385 * data direction bits in SBALE (SB Type)
2386 * data direction bits in QTCB
2387 * data direction bits in FCP_CMND IU
2388 */
2389 switch (scsi_cmnd->sc_data_direction) {
2390 case DMA_NONE:
2391 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2392 break;
2393 case DMA_FROM_DEVICE:
2394 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2395 fcp_cmnd_iu->rddata = 1;
2396 break;
2397 case DMA_TO_DEVICE:
2398 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2399 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2400 fcp_cmnd_iu->wddata = 1;
2401 break;
2402 case DMA_BIDIRECTIONAL:
2403 goto failed_scsi_cmnd;
2404 }
2405
2406 if (likely((scsi_cmnd->device->simple_tags) ||
2407 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2408 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2409 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2410 else
2411 fcp_cmnd_iu->task_attribute = UNTAGGED;
2412
2413 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2414 fcp_cmnd_iu->add_fcp_cdb_length =
2415 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2416
2417 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2418
2419 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2420 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2421
2422 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2423 scsi_sglist(scsi_cmnd),
2424 FSF_MAX_SBALS_PER_REQ);
2425 if (unlikely(real_bytes < 0)) {
2426 if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2427 dev_err(&adapter->ccw_device->dev,
2428 "Oversize data package, unit 0x%016Lx "
2429 "on port 0x%016Lx closed\n",
2430 (unsigned long long)unit->fcp_lun,
2431 (unsigned long long)unit->port->wwpn);
2432 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2433 retval = -EINVAL;
2434 }
2435 goto failed_scsi_cmnd;
2436 }
2437
2438 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2439
2440 retval = zfcp_fsf_req_send(req);
2441 if (unlikely(retval))
2442 goto failed_scsi_cmnd;
2443
2444 goto out;
2445
2446 failed_scsi_cmnd:
2447 zfcp_unit_put(unit);
2448 zfcp_fsf_req_free(req);
2449 scsi_cmnd->host_scribble = NULL;
2450 out:
2451 spin_unlock(&adapter->req_q_lock);
2452 return retval;
2453 }
2454
2455 /**
2456 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2457 * @unit: pointer to struct zfcp_unit
2458 * @tm_flags: unsigned byte for task management flags
2459 * Returns: on success pointer to struct fsf_req, NULL otherwise
2460 */
2461 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2462 {
2463 struct qdio_buffer_element *sbale;
2464 struct zfcp_fsf_req *req = NULL;
2465 struct fcp_cmnd_iu *fcp_cmnd_iu;
2466 struct zfcp_adapter *adapter = unit->port->adapter;
2467
2468 if (unlikely(!(atomic_read(&unit->status) &
2469 ZFCP_STATUS_COMMON_UNBLOCKED)))
2470 return NULL;
2471
2472 spin_lock_bh(&adapter->req_q_lock);
2473 if (zfcp_fsf_req_sbal_get(adapter))
2474 goto out;
2475 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
2476 adapter->pool.fsf_req_scsi);
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(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(&adapter->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_fsf_req *req = NULL;
2526 struct fsf_qtcb_bottom_support *bottom;
2527 int direction, retval = -EIO, bytes;
2528
2529 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2530 return ERR_PTR(-EOPNOTSUPP);
2531
2532 switch (fsf_cfdc->command) {
2533 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2534 direction = SBAL_FLAGS0_TYPE_WRITE;
2535 break;
2536 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2537 direction = SBAL_FLAGS0_TYPE_READ;
2538 break;
2539 default:
2540 return ERR_PTR(-EINVAL);
2541 }
2542
2543 spin_lock_bh(&adapter->req_q_lock);
2544 if (zfcp_fsf_req_sbal_get(adapter))
2545 goto out;
2546
2547 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2548 if (IS_ERR(req)) {
2549 retval = -EPERM;
2550 goto out;
2551 }
2552
2553 req->handler = zfcp_fsf_control_file_handler;
2554
2555 sbale = zfcp_qdio_sbale_req(req);
2556 sbale[0].flags |= direction;
2557
2558 bottom = &req->qtcb->bottom.support;
2559 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2560 bottom->option = fsf_cfdc->option;
2561
2562 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2563 FSF_MAX_SBALS_PER_REQ);
2564 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2565 zfcp_fsf_req_free(req);
2566 goto out;
2567 }
2568
2569 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2570 retval = zfcp_fsf_req_send(req);
2571 out:
2572 spin_unlock_bh(&adapter->req_q_lock);
2573
2574 if (!retval) {
2575 wait_event(req->completion_wq,
2576 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2577 return req;
2578 }
2579 return ERR_PTR(retval);
2580 }
Linux with added FPC-III support