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[SCSI] zfcp: Enable auto-port discovery for NPIV.
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
... / ...
CommitLineData
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
18static 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
25static 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
34static 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 */
44static 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
60static 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
72static 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
85static 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
99static 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 */
111void 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 */
133void 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
153static 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
171static 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
176 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
177 return;
178
179 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
180 zfcp_scsi_schedule_rports_block(adapter);
181
182 if (!link_down)
183 goto out;
184
185 switch (link_down->error_code) {
186 case FSF_PSQ_LINK_NO_LIGHT:
187 dev_warn(&req->adapter->ccw_device->dev,
188 "There is no light signal from the local "
189 "fibre channel cable\n");
190 break;
191 case FSF_PSQ_LINK_WRAP_PLUG:
192 dev_warn(&req->adapter->ccw_device->dev,
193 "There is a wrap plug instead of a fibre "
194 "channel cable\n");
195 break;
196 case FSF_PSQ_LINK_NO_FCP:
197 dev_warn(&req->adapter->ccw_device->dev,
198 "The adjacent fibre channel node does not "
199 "support FCP\n");
200 break;
201 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
202 dev_warn(&req->adapter->ccw_device->dev,
203 "The FCP device is suspended because of a "
204 "firmware update\n");
205 break;
206 case FSF_PSQ_LINK_INVALID_WWPN:
207 dev_warn(&req->adapter->ccw_device->dev,
208 "The FCP device detected a WWPN that is "
209 "duplicate or not valid\n");
210 break;
211 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
212 dev_warn(&req->adapter->ccw_device->dev,
213 "The fibre channel fabric does not support NPIV\n");
214 break;
215 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
216 dev_warn(&req->adapter->ccw_device->dev,
217 "The FCP adapter cannot support more NPIV ports\n");
218 break;
219 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The adjacent switch cannot support "
222 "more NPIV ports\n");
223 break;
224 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
225 dev_warn(&req->adapter->ccw_device->dev,
226 "The FCP adapter could not log in to the "
227 "fibre channel fabric\n");
228 break;
229 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
230 dev_warn(&req->adapter->ccw_device->dev,
231 "The WWPN assignment file on the FCP adapter "
232 "has been damaged\n");
233 break;
234 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
235 dev_warn(&req->adapter->ccw_device->dev,
236 "The mode table on the FCP adapter "
237 "has been damaged\n");
238 break;
239 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
240 dev_warn(&req->adapter->ccw_device->dev,
241 "All NPIV ports on the FCP adapter have "
242 "been assigned\n");
243 break;
244 default:
245 dev_warn(&req->adapter->ccw_device->dev,
246 "The link between the FCP adapter and "
247 "the FC fabric is down\n");
248 }
249out:
250 zfcp_erp_adapter_failed(adapter, id, req);
251}
252
253static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
254{
255 struct fsf_status_read_buffer *sr_buf = req->data;
256 struct fsf_link_down_info *ldi =
257 (struct fsf_link_down_info *) &sr_buf->payload;
258
259 switch (sr_buf->status_subtype) {
260 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
261 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
262 break;
263 case FSF_STATUS_READ_SUB_FDISC_FAILED:
264 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
265 break;
266 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
267 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
268 };
269}
270
271static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
272{
273 struct zfcp_adapter *adapter = req->adapter;
274 struct fsf_status_read_buffer *sr_buf = req->data;
275
276 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
277 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
278 mempool_free(sr_buf, adapter->pool.data_status_read);
279 zfcp_fsf_req_free(req);
280 return;
281 }
282
283 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
284
285 switch (sr_buf->status_type) {
286 case FSF_STATUS_READ_PORT_CLOSED:
287 zfcp_fsf_status_read_port_closed(req);
288 break;
289 case FSF_STATUS_READ_INCOMING_ELS:
290 zfcp_fc_incoming_els(req);
291 break;
292 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
293 break;
294 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
295 dev_warn(&adapter->ccw_device->dev,
296 "The error threshold for checksum statistics "
297 "has been exceeded\n");
298 zfcp_hba_dbf_event_berr(adapter, req);
299 break;
300 case FSF_STATUS_READ_LINK_DOWN:
301 zfcp_fsf_status_read_link_down(req);
302 break;
303 case FSF_STATUS_READ_LINK_UP:
304 dev_info(&adapter->ccw_device->dev,
305 "The local link has been restored\n");
306 /* All ports should be marked as ready to run again */
307 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
308 ZFCP_STATUS_COMMON_RUNNING,
309 ZFCP_SET);
310 zfcp_erp_adapter_reopen(adapter,
311 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
312 ZFCP_STATUS_COMMON_ERP_FAILED,
313 "fssrh_2", req);
314 break;
315 case FSF_STATUS_READ_NOTIFICATION_LOST:
316 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
317 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
318 req);
319 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
320 schedule_work(&adapter->scan_work);
321 break;
322 case FSF_STATUS_READ_CFDC_UPDATED:
323 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
324 break;
325 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
326 adapter->adapter_features = sr_buf->payload.word[0];
327 break;
328 }
329
330 mempool_free(sr_buf, adapter->pool.data_status_read);
331 zfcp_fsf_req_free(req);
332
333 atomic_inc(&adapter->stat_miss);
334 queue_work(zfcp_data.work_queue, &adapter->stat_work);
335}
336
337static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
338{
339 switch (req->qtcb->header.fsf_status_qual.word[0]) {
340 case FSF_SQ_FCP_RSP_AVAILABLE:
341 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
342 case FSF_SQ_NO_RETRY_POSSIBLE:
343 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
344 return;
345 case FSF_SQ_COMMAND_ABORTED:
346 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
347 break;
348 case FSF_SQ_NO_RECOM:
349 dev_err(&req->adapter->ccw_device->dev,
350 "The FCP adapter reported a problem "
351 "that cannot be recovered\n");
352 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
353 break;
354 }
355 /* all non-return stats set FSFREQ_ERROR*/
356 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
357}
358
359static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
360{
361 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
362 return;
363
364 switch (req->qtcb->header.fsf_status) {
365 case FSF_UNKNOWN_COMMAND:
366 dev_err(&req->adapter->ccw_device->dev,
367 "The FCP adapter does not recognize the command 0x%x\n",
368 req->qtcb->header.fsf_command);
369 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
370 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372 case FSF_ADAPTER_STATUS_AVAILABLE:
373 zfcp_fsf_fsfstatus_qual_eval(req);
374 break;
375 }
376}
377
378static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
379{
380 struct zfcp_adapter *adapter = req->adapter;
381 struct fsf_qtcb *qtcb = req->qtcb;
382 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
383
384 zfcp_hba_dbf_event_fsf_response(req);
385
386 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
387 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
388 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
389 return;
390 }
391
392 switch (qtcb->prefix.prot_status) {
393 case FSF_PROT_GOOD:
394 case FSF_PROT_FSF_STATUS_PRESENTED:
395 return;
396 case FSF_PROT_QTCB_VERSION_ERROR:
397 dev_err(&adapter->ccw_device->dev,
398 "QTCB version 0x%x not supported by FCP adapter "
399 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
400 psq->word[0], psq->word[1]);
401 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
402 break;
403 case FSF_PROT_ERROR_STATE:
404 case FSF_PROT_SEQ_NUMB_ERROR:
405 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
406 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
407 break;
408 case FSF_PROT_UNSUPP_QTCB_TYPE:
409 dev_err(&adapter->ccw_device->dev,
410 "The QTCB type is not supported by the FCP adapter\n");
411 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
412 break;
413 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
414 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
415 &adapter->status);
416 break;
417 case FSF_PROT_DUPLICATE_REQUEST_ID:
418 dev_err(&adapter->ccw_device->dev,
419 "0x%Lx is an ambiguous request identifier\n",
420 (unsigned long long)qtcb->bottom.support.req_handle);
421 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
422 break;
423 case FSF_PROT_LINK_DOWN:
424 zfcp_fsf_link_down_info_eval(req, "fspse_5",
425 &psq->link_down_info);
426 /* FIXME: reopening adapter now? better wait for link up */
427 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
428 break;
429 case FSF_PROT_REEST_QUEUE:
430 /* All ports should be marked as ready to run again */
431 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
432 ZFCP_STATUS_COMMON_RUNNING,
433 ZFCP_SET);
434 zfcp_erp_adapter_reopen(adapter,
435 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
436 ZFCP_STATUS_COMMON_ERP_FAILED,
437 "fspse_8", 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, "fspse_9", 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 */
457void 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
490static 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, "fsece_1", req);
530 return -EIO;
531 }
532
533 return 0;
534}
535
536static 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, "fsecdh1", 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, "fsecdh2",
581 &qtcb->header.fsf_status_qual.link_down_info);
582 break;
583 default:
584 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", 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, "fsecdh4", 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, "fsecdh5", req);
608 }
609}
610
611static 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 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
623 } else
624 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
625 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
626 fc_host_supported_speeds(shost) = bottom->supported_speed;
627}
628
629static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
630{
631 struct fsf_qtcb *qtcb = req->qtcb;
632
633 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
634 return;
635
636 switch (qtcb->header.fsf_status) {
637 case FSF_GOOD:
638 zfcp_fsf_exchange_port_evaluate(req);
639 break;
640 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
641 zfcp_fsf_exchange_port_evaluate(req);
642 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
643 &qtcb->header.fsf_status_qual.link_down_info);
644 break;
645 }
646}
647
648static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
649 __releases(&adapter->req_q_lock)
650 __acquires(&adapter->req_q_lock)
651{
652 struct zfcp_qdio_queue *req_q = &adapter->req_q;
653 long ret;
654
655 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
656 return -EIO;
657 if (atomic_read(&req_q->count) > 0)
658 return 0;
659
660 atomic_dec(&req_q->count);
661 spin_unlock_bh(&adapter->req_q_lock);
662 ret = wait_event_interruptible_timeout(adapter->request_wq,
663 atomic_read(&req_q->count) >= 0,
664 5 * HZ);
665 spin_lock_bh(&adapter->req_q_lock);
666 atomic_inc(&req_q->count);
667
668 if (ret > 0)
669 return 0;
670 if (!ret)
671 atomic_inc(&adapter->qdio_outb_full);
672 return -EIO;
673}
674
675static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
676{
677 struct zfcp_fsf_req *req;
678 req = mempool_alloc(pool, GFP_ATOMIC);
679 if (!req)
680 return NULL;
681 memset(req, 0, sizeof(*req));
682 req->pool = pool;
683 return req;
684}
685
686static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
687{
688 struct zfcp_fsf_req_qtcb *qtcb;
689
690 if (likely(pool))
691 qtcb = mempool_alloc(pool, GFP_ATOMIC);
692 else
693 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
694 GFP_ATOMIC);
695 if (unlikely(!qtcb))
696 return NULL;
697
698 memset(qtcb, 0, sizeof(*qtcb));
699 qtcb->fsf_req.qtcb = &qtcb->qtcb;
700 qtcb->fsf_req.pool = pool;
701
702 return &qtcb->fsf_req;
703}
704
705static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
706 u32 fsf_cmd, int req_flags,
707 mempool_t *pool)
708{
709 struct qdio_buffer_element *sbale;
710
711 struct zfcp_fsf_req *req;
712 struct zfcp_qdio_queue *req_q = &adapter->req_q;
713
714 if (req_flags & ZFCP_REQ_NO_QTCB)
715 req = zfcp_fsf_alloc_noqtcb(pool);
716 else
717 req = zfcp_fsf_alloc_qtcb(pool);
718
719 if (unlikely(!req))
720 return ERR_PTR(-EIO);
721
722 if (adapter->req_no == 0)
723 adapter->req_no++;
724
725 INIT_LIST_HEAD(&req->list);
726 init_timer(&req->timer);
727 init_waitqueue_head(&req->completion_wq);
728
729 req->adapter = adapter;
730 req->fsf_command = fsf_cmd;
731 req->req_id = adapter->req_no;
732 req->sbal_number = 1;
733 req->sbal_first = req_q->first;
734 req->sbal_last = req_q->first;
735 req->sbale_curr = 1;
736
737 sbale = zfcp_qdio_sbale_req(req);
738 sbale[0].addr = (void *) req->req_id;
739 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
740
741 if (likely(req->qtcb)) {
742 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
743 req->qtcb->prefix.req_id = req->req_id;
744 req->qtcb->prefix.ulp_info = 26;
745 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
746 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
747 req->qtcb->header.req_handle = req->req_id;
748 req->qtcb->header.fsf_command = req->fsf_command;
749 req->seq_no = adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
751 sbale[1].addr = (void *) req->qtcb;
752 sbale[1].length = sizeof(struct fsf_qtcb);
753 }
754
755 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
756 zfcp_fsf_req_free(req);
757 return ERR_PTR(-EIO);
758 }
759
760 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
761 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
762
763 return req;
764}
765
766static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767{
768 struct zfcp_adapter *adapter = req->adapter;
769 unsigned long flags;
770 int idx;
771 int with_qtcb = (req->qtcb != NULL);
772
773 /* put allocated FSF request into hash table */
774 spin_lock_irqsave(&adapter->req_list_lock, flags);
775 idx = zfcp_reqlist_hash(req->req_id);
776 list_add_tail(&req->list, &adapter->req_list[idx]);
777 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
778
779 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
780 req->issued = get_clock();
781 if (zfcp_qdio_send(req)) {
782 del_timer(&req->timer);
783 spin_lock_irqsave(&adapter->req_list_lock, flags);
784 /* lookup request again, list might have changed */
785 if (zfcp_reqlist_find_safe(adapter, req))
786 zfcp_reqlist_remove(adapter, req);
787 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
788 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
789 return -EIO;
790 }
791
792 /* Don't increase for unsolicited status */
793 if (with_qtcb)
794 adapter->fsf_req_seq_no++;
795 adapter->req_no++;
796
797 return 0;
798}
799
800/**
801 * zfcp_fsf_status_read - send status read request
802 * @adapter: pointer to struct zfcp_adapter
803 * @req_flags: request flags
804 * Returns: 0 on success, ERROR otherwise
805 */
806int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
807{
808 struct zfcp_fsf_req *req;
809 struct fsf_status_read_buffer *sr_buf;
810 struct qdio_buffer_element *sbale;
811 int retval = -EIO;
812
813 spin_lock_bh(&adapter->req_q_lock);
814 if (zfcp_fsf_req_sbal_get(adapter))
815 goto out;
816
817 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
818 ZFCP_REQ_NO_QTCB,
819 adapter->pool.fsf_req_status_read);
820 if (IS_ERR(req)) {
821 retval = PTR_ERR(req);
822 goto out;
823 }
824
825 sbale = zfcp_qdio_sbale_req(req);
826 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
840
841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
844
845 goto out;
846
847failed_req_send:
848 mempool_free(sr_buf, adapter->pool.data_status_read);
849failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
852out:
853 spin_unlock_bh(&adapter->req_q_lock);
854 return retval;
855}
856
857static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858{
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
866 case FSF_PORT_HANDLE_NOT_VALID:
867 if (fsq->word[0] == fsq->word[1]) {
868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
871 }
872 break;
873 case FSF_LUN_HANDLE_NOT_VALID:
874 if (fsq->word[0] == fsq->word[1]) {
875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
877 }
878 break;
879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
881 break;
882 case FSF_PORT_BOXED:
883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
886 break;
887 case FSF_LUN_BOXED:
888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_ADAPTER_STATUS_AVAILABLE:
893 switch (fsq->word[0]) {
894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
895 zfcp_test_link(unit->port);
896 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
898 break;
899 }
900 break;
901 case FSF_GOOD:
902 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
903 break;
904 }
905}
906
907/**
908 * zfcp_fsf_abort_fcp_command - abort running SCSI command
909 * @old_req_id: unsigned long
910 * @unit: pointer to struct zfcp_unit
911 * Returns: pointer to struct zfcp_fsf_req
912 */
913
914struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
915 struct zfcp_unit *unit)
916{
917 struct qdio_buffer_element *sbale;
918 struct zfcp_fsf_req *req = NULL;
919 struct zfcp_adapter *adapter = unit->port->adapter;
920
921 spin_lock_bh(&adapter->req_q_lock);
922 if (zfcp_fsf_req_sbal_get(adapter))
923 goto out;
924 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
925 0, adapter->pool.fsf_req_abort);
926 if (IS_ERR(req)) {
927 req = NULL;
928 goto out;
929 }
930
931 if (unlikely(!(atomic_read(&unit->status) &
932 ZFCP_STATUS_COMMON_UNBLOCKED)))
933 goto out_error_free;
934
935 sbale = zfcp_qdio_sbale_req(req);
936 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
937 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
938
939 req->data = unit;
940 req->handler = zfcp_fsf_abort_fcp_command_handler;
941 req->qtcb->header.lun_handle = unit->handle;
942 req->qtcb->header.port_handle = unit->port->handle;
943 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
944
945 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
946 if (!zfcp_fsf_req_send(req))
947 goto out;
948
949out_error_free:
950 zfcp_fsf_req_free(req);
951 req = NULL;
952out:
953 spin_unlock_bh(&adapter->req_q_lock);
954 return req;
955}
956
957static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
958{
959 struct zfcp_adapter *adapter = req->adapter;
960 struct zfcp_send_ct *send_ct = req->data;
961 struct fsf_qtcb_header *header = &req->qtcb->header;
962
963 send_ct->status = -EINVAL;
964
965 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
966 goto skip_fsfstatus;
967
968 switch (header->fsf_status) {
969 case FSF_GOOD:
970 zfcp_san_dbf_event_ct_response(req);
971 send_ct->status = 0;
972 break;
973 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
974 zfcp_fsf_class_not_supp(req);
975 break;
976 case FSF_ADAPTER_STATUS_AVAILABLE:
977 switch (header->fsf_status_qual.word[0]){
978 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
979 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
981 break;
982 }
983 break;
984 case FSF_ACCESS_DENIED:
985 break;
986 case FSF_PORT_BOXED:
987 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
988 ZFCP_STATUS_FSFREQ_RETRY;
989 break;
990 case FSF_PORT_HANDLE_NOT_VALID:
991 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
992 case FSF_GENERIC_COMMAND_REJECTED:
993 case FSF_PAYLOAD_SIZE_MISMATCH:
994 case FSF_REQUEST_SIZE_TOO_LARGE:
995 case FSF_RESPONSE_SIZE_TOO_LARGE:
996 case FSF_SBAL_MISMATCH:
997 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
998 break;
999 }
1000
1001skip_fsfstatus:
1002 if (send_ct->handler)
1003 send_ct->handler(send_ct->handler_data);
1004}
1005
1006static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1007 struct scatterlist *sg_req,
1008 struct scatterlist *sg_resp,
1009 int max_sbals)
1010{
1011 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1012 u32 feat = req->adapter->adapter_features;
1013 int bytes;
1014
1015 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1016 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1017 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1018 return -EOPNOTSUPP;
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 return 0;
1027 }
1028
1029 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1030 sg_req, max_sbals);
1031 if (bytes <= 0)
1032 return -ENOMEM;
1033 req->qtcb->bottom.support.req_buf_length = bytes;
1034 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1035
1036 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1037 sg_resp, max_sbals);
1038 if (bytes <= 0)
1039 return -ENOMEM;
1040 req->qtcb->bottom.support.resp_buf_length = bytes;
1041
1042 return 0;
1043}
1044
1045/**
1046 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1047 * @ct: pointer to struct zfcp_send_ct with data for request
1048 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1049 * @erp_action: if non-null the Generic Service request sent within ERP
1050 */
1051int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1052 struct zfcp_erp_action *erp_action)
1053{
1054 struct zfcp_wka_port *wka_port = ct->wka_port;
1055 struct zfcp_adapter *adapter = wka_port->adapter;
1056 struct zfcp_fsf_req *req;
1057 int ret = -EIO;
1058
1059 spin_lock_bh(&adapter->req_q_lock);
1060 if (zfcp_fsf_req_sbal_get(adapter))
1061 goto out;
1062
1063 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1064 ZFCP_REQ_AUTO_CLEANUP, pool);
1065 if (IS_ERR(req)) {
1066 ret = PTR_ERR(req);
1067 goto out;
1068 }
1069
1070 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1071 FSF_MAX_SBALS_PER_REQ);
1072 if (ret)
1073 goto failed_send;
1074
1075 req->handler = zfcp_fsf_send_ct_handler;
1076 req->qtcb->header.port_handle = wka_port->handle;
1077 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1078 req->qtcb->bottom.support.timeout = ct->timeout;
1079 req->data = ct;
1080
1081 zfcp_san_dbf_event_ct_request(req);
1082
1083 if (erp_action) {
1084 erp_action->fsf_req = req;
1085 req->erp_action = erp_action;
1086 zfcp_fsf_start_erp_timer(req);
1087 } else
1088 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1089
1090 ret = zfcp_fsf_req_send(req);
1091 if (ret)
1092 goto failed_send;
1093
1094 goto out;
1095
1096failed_send:
1097 zfcp_fsf_req_free(req);
1098 if (erp_action)
1099 erp_action->fsf_req = NULL;
1100out:
1101 spin_unlock_bh(&adapter->req_q_lock);
1102 return ret;
1103}
1104
1105static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1106{
1107 struct zfcp_send_els *send_els = req->data;
1108 struct zfcp_port *port = send_els->port;
1109 struct fsf_qtcb_header *header = &req->qtcb->header;
1110
1111 send_els->status = -EINVAL;
1112
1113 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1114 goto skip_fsfstatus;
1115
1116 switch (header->fsf_status) {
1117 case FSF_GOOD:
1118 zfcp_san_dbf_event_els_response(req);
1119 send_els->status = 0;
1120 break;
1121 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1122 zfcp_fsf_class_not_supp(req);
1123 break;
1124 case FSF_ADAPTER_STATUS_AVAILABLE:
1125 switch (header->fsf_status_qual.word[0]){
1126 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1127 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1128 zfcp_test_link(port);
1129 /*fall through */
1130 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1131 case FSF_SQ_RETRY_IF_POSSIBLE:
1132 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1133 break;
1134 }
1135 break;
1136 case FSF_ELS_COMMAND_REJECTED:
1137 case FSF_PAYLOAD_SIZE_MISMATCH:
1138 case FSF_REQUEST_SIZE_TOO_LARGE:
1139 case FSF_RESPONSE_SIZE_TOO_LARGE:
1140 break;
1141 case FSF_ACCESS_DENIED:
1142 zfcp_fsf_access_denied_port(req, port);
1143 break;
1144 case FSF_SBAL_MISMATCH:
1145 /* should never occure, avoided in zfcp_fsf_send_els */
1146 /* fall through */
1147 default:
1148 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1149 break;
1150 }
1151skip_fsfstatus:
1152 if (send_els->handler)
1153 send_els->handler(send_els->handler_data);
1154}
1155
1156/**
1157 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1158 * @els: pointer to struct zfcp_send_els with data for the command
1159 */
1160int zfcp_fsf_send_els(struct zfcp_send_els *els)
1161{
1162 struct zfcp_fsf_req *req;
1163 struct zfcp_adapter *adapter = els->adapter;
1164 struct fsf_qtcb_bottom_support *bottom;
1165 int ret = -EIO;
1166
1167 spin_lock_bh(&adapter->req_q_lock);
1168 if (zfcp_fsf_req_sbal_get(adapter))
1169 goto out;
1170 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1171 ZFCP_REQ_AUTO_CLEANUP, NULL);
1172 if (IS_ERR(req)) {
1173 ret = PTR_ERR(req);
1174 goto out;
1175 }
1176
1177 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1178
1179 if (ret)
1180 goto failed_send;
1181
1182 bottom = &req->qtcb->bottom.support;
1183 req->handler = zfcp_fsf_send_els_handler;
1184 bottom->d_id = els->d_id;
1185 bottom->service_class = FSF_CLASS_3;
1186 bottom->timeout = 2 * R_A_TOV;
1187 req->data = els;
1188
1189 zfcp_san_dbf_event_els_request(req);
1190
1191 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1192 ret = zfcp_fsf_req_send(req);
1193 if (ret)
1194 goto failed_send;
1195
1196 goto out;
1197
1198failed_send:
1199 zfcp_fsf_req_free(req);
1200out:
1201 spin_unlock_bh(&adapter->req_q_lock);
1202 return ret;
1203}
1204
1205int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1206{
1207 struct qdio_buffer_element *sbale;
1208 struct zfcp_fsf_req *req;
1209 struct zfcp_adapter *adapter = erp_action->adapter;
1210 int retval = -EIO;
1211
1212 spin_lock_bh(&adapter->req_q_lock);
1213 if (zfcp_fsf_req_sbal_get(adapter))
1214 goto out;
1215 req = zfcp_fsf_req_create(adapter,
1216 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1217 ZFCP_REQ_AUTO_CLEANUP,
1218 adapter->pool.fsf_req_erp);
1219 if (IS_ERR(req)) {
1220 retval = PTR_ERR(req);
1221 goto out;
1222 }
1223
1224 sbale = zfcp_qdio_sbale_req(req);
1225 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1226 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1227
1228 req->qtcb->bottom.config.feature_selection =
1229 FSF_FEATURE_CFDC |
1230 FSF_FEATURE_LUN_SHARING |
1231 FSF_FEATURE_NOTIFICATION_LOST |
1232 FSF_FEATURE_UPDATE_ALERT;
1233 req->erp_action = erp_action;
1234 req->handler = zfcp_fsf_exchange_config_data_handler;
1235 erp_action->fsf_req = req;
1236
1237 zfcp_fsf_start_erp_timer(req);
1238 retval = zfcp_fsf_req_send(req);
1239 if (retval) {
1240 zfcp_fsf_req_free(req);
1241 erp_action->fsf_req = NULL;
1242 }
1243out:
1244 spin_unlock_bh(&adapter->req_q_lock);
1245 return retval;
1246}
1247
1248int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1249 struct fsf_qtcb_bottom_config *data)
1250{
1251 struct qdio_buffer_element *sbale;
1252 struct zfcp_fsf_req *req = NULL;
1253 int retval = -EIO;
1254
1255 spin_lock_bh(&adapter->req_q_lock);
1256 if (zfcp_fsf_req_sbal_get(adapter))
1257 goto out;
1258
1259 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1260 0, NULL);
1261 if (IS_ERR(req)) {
1262 retval = PTR_ERR(req);
1263 goto out;
1264 }
1265
1266 sbale = zfcp_qdio_sbale_req(req);
1267 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1268 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1269 req->handler = zfcp_fsf_exchange_config_data_handler;
1270
1271 req->qtcb->bottom.config.feature_selection =
1272 FSF_FEATURE_CFDC |
1273 FSF_FEATURE_LUN_SHARING |
1274 FSF_FEATURE_NOTIFICATION_LOST |
1275 FSF_FEATURE_UPDATE_ALERT;
1276
1277 if (data)
1278 req->data = data;
1279
1280 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1281 retval = zfcp_fsf_req_send(req);
1282out:
1283 spin_unlock_bh(&adapter->req_q_lock);
1284 if (!retval)
1285 wait_event(req->completion_wq,
1286 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1287
1288 zfcp_fsf_req_free(req);
1289
1290 return retval;
1291}
1292
1293/**
1294 * zfcp_fsf_exchange_port_data - request information about local port
1295 * @erp_action: ERP action for the adapter for which port data is requested
1296 * Returns: 0 on success, error otherwise
1297 */
1298int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1299{
1300 struct qdio_buffer_element *sbale;
1301 struct zfcp_fsf_req *req;
1302 struct zfcp_adapter *adapter = erp_action->adapter;
1303 int retval = -EIO;
1304
1305 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1306 return -EOPNOTSUPP;
1307
1308 spin_lock_bh(&adapter->req_q_lock);
1309 if (zfcp_fsf_req_sbal_get(adapter))
1310 goto out;
1311 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1312 ZFCP_REQ_AUTO_CLEANUP,
1313 adapter->pool.fsf_req_erp);
1314 if (IS_ERR(req)) {
1315 retval = PTR_ERR(req);
1316 goto out;
1317 }
1318
1319 sbale = zfcp_qdio_sbale_req(req);
1320 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1321 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1322
1323 req->handler = zfcp_fsf_exchange_port_data_handler;
1324 req->erp_action = erp_action;
1325 erp_action->fsf_req = req;
1326
1327 zfcp_fsf_start_erp_timer(req);
1328 retval = zfcp_fsf_req_send(req);
1329 if (retval) {
1330 zfcp_fsf_req_free(req);
1331 erp_action->fsf_req = NULL;
1332 }
1333out:
1334 spin_unlock_bh(&adapter->req_q_lock);
1335 return retval;
1336}
1337
1338/**
1339 * zfcp_fsf_exchange_port_data_sync - request information about local port
1340 * @adapter: pointer to struct zfcp_adapter
1341 * @data: pointer to struct fsf_qtcb_bottom_port
1342 * Returns: 0 on success, error otherwise
1343 */
1344int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1345 struct fsf_qtcb_bottom_port *data)
1346{
1347 struct qdio_buffer_element *sbale;
1348 struct zfcp_fsf_req *req = NULL;
1349 int retval = -EIO;
1350
1351 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1352 return -EOPNOTSUPP;
1353
1354 spin_lock_bh(&adapter->req_q_lock);
1355 if (zfcp_fsf_req_sbal_get(adapter))
1356 goto out;
1357
1358 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1359 NULL);
1360 if (IS_ERR(req)) {
1361 retval = PTR_ERR(req);
1362 goto out;
1363 }
1364
1365 if (data)
1366 req->data = data;
1367
1368 sbale = zfcp_qdio_sbale_req(req);
1369 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1370 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1371
1372 req->handler = zfcp_fsf_exchange_port_data_handler;
1373 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1374 retval = zfcp_fsf_req_send(req);
1375out:
1376 spin_unlock_bh(&adapter->req_q_lock);
1377 if (!retval)
1378 wait_event(req->completion_wq,
1379 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1380 zfcp_fsf_req_free(req);
1381
1382 return retval;
1383}
1384
1385static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1386{
1387 struct zfcp_port *port = req->data;
1388 struct fsf_qtcb_header *header = &req->qtcb->header;
1389 struct fsf_plogi *plogi;
1390
1391 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1392 return;
1393
1394 switch (header->fsf_status) {
1395 case FSF_PORT_ALREADY_OPEN:
1396 break;
1397 case FSF_ACCESS_DENIED:
1398 zfcp_fsf_access_denied_port(req, port);
1399 break;
1400 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1401 dev_warn(&req->adapter->ccw_device->dev,
1402 "Not enough FCP adapter resources to open "
1403 "remote port 0x%016Lx\n",
1404 (unsigned long long)port->wwpn);
1405 zfcp_erp_port_failed(port, "fsoph_1", req);
1406 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1407 break;
1408 case FSF_ADAPTER_STATUS_AVAILABLE:
1409 switch (header->fsf_status_qual.word[0]) {
1410 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1411 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1412 case FSF_SQ_NO_RETRY_POSSIBLE:
1413 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1414 break;
1415 }
1416 break;
1417 case FSF_GOOD:
1418 port->handle = header->port_handle;
1419 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1420 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1421 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1422 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1423 &port->status);
1424 /* check whether D_ID has changed during open */
1425 /*
1426 * FIXME: This check is not airtight, as the FCP channel does
1427 * not monitor closures of target port connections caused on
1428 * the remote side. Thus, they might miss out on invalidating
1429 * locally cached WWPNs (and other N_Port parameters) of gone
1430 * target ports. So, our heroic attempt to make things safe
1431 * could be undermined by 'open port' response data tagged with
1432 * obsolete WWPNs. Another reason to monitor potential
1433 * connection closures ourself at least (by interpreting
1434 * incoming ELS' and unsolicited status). It just crosses my
1435 * mind that one should be able to cross-check by means of
1436 * another GID_PN straight after a port has been opened.
1437 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1438 */
1439 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1440 if (req->qtcb->bottom.support.els1_length >=
1441 FSF_PLOGI_MIN_LEN) {
1442 if (plogi->serv_param.wwpn != port->wwpn)
1443 port->d_id = 0;
1444 else {
1445 port->wwnn = plogi->serv_param.wwnn;
1446 zfcp_fc_plogi_evaluate(port, plogi);
1447 }
1448 }
1449 break;
1450 case FSF_UNKNOWN_OP_SUBTYPE:
1451 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452 break;
1453 }
1454}
1455
1456/**
1457 * zfcp_fsf_open_port - create and send open port request
1458 * @erp_action: pointer to struct zfcp_erp_action
1459 * Returns: 0 on success, error otherwise
1460 */
1461int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1462{
1463 struct qdio_buffer_element *sbale;
1464 struct zfcp_adapter *adapter = erp_action->adapter;
1465 struct zfcp_fsf_req *req;
1466 int retval = -EIO;
1467
1468 spin_lock_bh(&adapter->req_q_lock);
1469 if (zfcp_fsf_req_sbal_get(adapter))
1470 goto out;
1471
1472 req = zfcp_fsf_req_create(adapter,
1473 FSF_QTCB_OPEN_PORT_WITH_DID,
1474 ZFCP_REQ_AUTO_CLEANUP,
1475 adapter->pool.fsf_req_erp);
1476 if (IS_ERR(req)) {
1477 retval = PTR_ERR(req);
1478 goto out;
1479 }
1480
1481 sbale = zfcp_qdio_sbale_req(req);
1482 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1483 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1484
1485 req->handler = zfcp_fsf_open_port_handler;
1486 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1487 req->data = erp_action->port;
1488 req->erp_action = erp_action;
1489 erp_action->fsf_req = req;
1490
1491 zfcp_fsf_start_erp_timer(req);
1492 retval = zfcp_fsf_req_send(req);
1493 if (retval) {
1494 zfcp_fsf_req_free(req);
1495 erp_action->fsf_req = NULL;
1496 }
1497out:
1498 spin_unlock_bh(&adapter->req_q_lock);
1499 return retval;
1500}
1501
1502static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1503{
1504 struct zfcp_port *port = req->data;
1505
1506 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1507 return;
1508
1509 switch (req->qtcb->header.fsf_status) {
1510 case FSF_PORT_HANDLE_NOT_VALID:
1511 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1512 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1513 break;
1514 case FSF_ADAPTER_STATUS_AVAILABLE:
1515 break;
1516 case FSF_GOOD:
1517 zfcp_erp_modify_port_status(port, "fscph_2", req,
1518 ZFCP_STATUS_COMMON_OPEN,
1519 ZFCP_CLEAR);
1520 break;
1521 }
1522}
1523
1524/**
1525 * zfcp_fsf_close_port - create and send close port request
1526 * @erp_action: pointer to struct zfcp_erp_action
1527 * Returns: 0 on success, error otherwise
1528 */
1529int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1530{
1531 struct qdio_buffer_element *sbale;
1532 struct zfcp_adapter *adapter = erp_action->adapter;
1533 struct zfcp_fsf_req *req;
1534 int retval = -EIO;
1535
1536 spin_lock_bh(&adapter->req_q_lock);
1537 if (zfcp_fsf_req_sbal_get(adapter))
1538 goto out;
1539
1540 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1541 ZFCP_REQ_AUTO_CLEANUP,
1542 adapter->pool.fsf_req_erp);
1543 if (IS_ERR(req)) {
1544 retval = PTR_ERR(req);
1545 goto out;
1546 }
1547
1548 sbale = zfcp_qdio_sbale_req(req);
1549 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1550 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1551
1552 req->handler = zfcp_fsf_close_port_handler;
1553 req->data = erp_action->port;
1554 req->erp_action = erp_action;
1555 req->qtcb->header.port_handle = erp_action->port->handle;
1556 erp_action->fsf_req = req;
1557
1558 zfcp_fsf_start_erp_timer(req);
1559 retval = zfcp_fsf_req_send(req);
1560 if (retval) {
1561 zfcp_fsf_req_free(req);
1562 erp_action->fsf_req = NULL;
1563 }
1564out:
1565 spin_unlock_bh(&adapter->req_q_lock);
1566 return retval;
1567}
1568
1569static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1570{
1571 struct zfcp_wka_port *wka_port = req->data;
1572 struct fsf_qtcb_header *header = &req->qtcb->header;
1573
1574 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1575 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1576 goto out;
1577 }
1578
1579 switch (header->fsf_status) {
1580 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1581 dev_warn(&req->adapter->ccw_device->dev,
1582 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1583 case FSF_ADAPTER_STATUS_AVAILABLE:
1584 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1585 case FSF_ACCESS_DENIED:
1586 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1587 break;
1588 case FSF_PORT_ALREADY_OPEN:
1589 break;
1590 case FSF_GOOD:
1591 wka_port->handle = header->port_handle;
1592 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1593 }
1594out:
1595 wake_up(&wka_port->completion_wq);
1596}
1597
1598/**
1599 * zfcp_fsf_open_wka_port - create and send open wka-port request
1600 * @wka_port: pointer to struct zfcp_wka_port
1601 * Returns: 0 on success, error otherwise
1602 */
1603int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1604{
1605 struct qdio_buffer_element *sbale;
1606 struct zfcp_adapter *adapter = wka_port->adapter;
1607 struct zfcp_fsf_req *req;
1608 int retval = -EIO;
1609
1610 spin_lock_bh(&adapter->req_q_lock);
1611 if (zfcp_fsf_req_sbal_get(adapter))
1612 goto out;
1613
1614 req = zfcp_fsf_req_create(adapter,
1615 FSF_QTCB_OPEN_PORT_WITH_DID,
1616 ZFCP_REQ_AUTO_CLEANUP,
1617 adapter->pool.fsf_req_erp);
1618 if (unlikely(IS_ERR(req))) {
1619 retval = PTR_ERR(req);
1620 goto out;
1621 }
1622
1623 sbale = zfcp_qdio_sbale_req(req);
1624 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1625 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1626
1627 req->handler = zfcp_fsf_open_wka_port_handler;
1628 req->qtcb->bottom.support.d_id = wka_port->d_id;
1629 req->data = wka_port;
1630
1631 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1632 retval = zfcp_fsf_req_send(req);
1633 if (retval)
1634 zfcp_fsf_req_free(req);
1635out:
1636 spin_unlock_bh(&adapter->req_q_lock);
1637 return retval;
1638}
1639
1640static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1641{
1642 struct zfcp_wka_port *wka_port = req->data;
1643
1644 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1645 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1647 }
1648
1649 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1650 wake_up(&wka_port->completion_wq);
1651}
1652
1653/**
1654 * zfcp_fsf_close_wka_port - create and send close wka port request
1655 * @erp_action: pointer to struct zfcp_erp_action
1656 * Returns: 0 on success, error otherwise
1657 */
1658int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1659{
1660 struct qdio_buffer_element *sbale;
1661 struct zfcp_adapter *adapter = wka_port->adapter;
1662 struct zfcp_fsf_req *req;
1663 int retval = -EIO;
1664
1665 spin_lock_bh(&adapter->req_q_lock);
1666 if (zfcp_fsf_req_sbal_get(adapter))
1667 goto out;
1668
1669 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1670 ZFCP_REQ_AUTO_CLEANUP,
1671 adapter->pool.fsf_req_erp);
1672 if (unlikely(IS_ERR(req))) {
1673 retval = PTR_ERR(req);
1674 goto out;
1675 }
1676
1677 sbale = zfcp_qdio_sbale_req(req);
1678 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1679 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1680
1681 req->handler = zfcp_fsf_close_wka_port_handler;
1682 req->data = wka_port;
1683 req->qtcb->header.port_handle = wka_port->handle;
1684
1685 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1686 retval = zfcp_fsf_req_send(req);
1687 if (retval)
1688 zfcp_fsf_req_free(req);
1689out:
1690 spin_unlock_bh(&adapter->req_q_lock);
1691 return retval;
1692}
1693
1694static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1695{
1696 struct zfcp_port *port = req->data;
1697 struct fsf_qtcb_header *header = &req->qtcb->header;
1698 struct zfcp_unit *unit;
1699
1700 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1701 return;
1702
1703 switch (header->fsf_status) {
1704 case FSF_PORT_HANDLE_NOT_VALID:
1705 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1706 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707 break;
1708 case FSF_ACCESS_DENIED:
1709 zfcp_fsf_access_denied_port(req, port);
1710 break;
1711 case FSF_PORT_BOXED:
1712 zfcp_erp_port_boxed(port, "fscpph2", req);
1713 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1714 ZFCP_STATUS_FSFREQ_RETRY;
1715 /* can't use generic zfcp_erp_modify_port_status because
1716 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1717 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718 list_for_each_entry(unit, &port->unit_list_head, list)
1719 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1720 &unit->status);
1721 break;
1722 case FSF_ADAPTER_STATUS_AVAILABLE:
1723 switch (header->fsf_status_qual.word[0]) {
1724 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1725 /* fall through */
1726 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1727 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1728 break;
1729 }
1730 break;
1731 case FSF_GOOD:
1732 /* can't use generic zfcp_erp_modify_port_status because
1733 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1734 */
1735 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1736 list_for_each_entry(unit, &port->unit_list_head, list)
1737 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1738 &unit->status);
1739 break;
1740 }
1741}
1742
1743/**
1744 * zfcp_fsf_close_physical_port - close physical port
1745 * @erp_action: pointer to struct zfcp_erp_action
1746 * Returns: 0 on success
1747 */
1748int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1749{
1750 struct qdio_buffer_element *sbale;
1751 struct zfcp_adapter *adapter = erp_action->adapter;
1752 struct zfcp_fsf_req *req;
1753 int retval = -EIO;
1754
1755 spin_lock_bh(&adapter->req_q_lock);
1756 if (zfcp_fsf_req_sbal_get(adapter))
1757 goto out;
1758
1759 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1760 ZFCP_REQ_AUTO_CLEANUP,
1761 adapter->pool.fsf_req_erp);
1762 if (IS_ERR(req)) {
1763 retval = PTR_ERR(req);
1764 goto out;
1765 }
1766
1767 sbale = zfcp_qdio_sbale_req(req);
1768 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1769 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1770
1771 req->data = erp_action->port;
1772 req->qtcb->header.port_handle = erp_action->port->handle;
1773 req->erp_action = erp_action;
1774 req->handler = zfcp_fsf_close_physical_port_handler;
1775 erp_action->fsf_req = req;
1776
1777 zfcp_fsf_start_erp_timer(req);
1778 retval = zfcp_fsf_req_send(req);
1779 if (retval) {
1780 zfcp_fsf_req_free(req);
1781 erp_action->fsf_req = NULL;
1782 }
1783out:
1784 spin_unlock_bh(&adapter->req_q_lock);
1785 return retval;
1786}
1787
1788static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1789{
1790 struct zfcp_adapter *adapter = req->adapter;
1791 struct zfcp_unit *unit = req->data;
1792 struct fsf_qtcb_header *header = &req->qtcb->header;
1793 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1794 struct fsf_queue_designator *queue_designator =
1795 &header->fsf_status_qual.fsf_queue_designator;
1796 int exclusive, readwrite;
1797
1798 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1799 return;
1800
1801 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1802 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1803 ZFCP_STATUS_UNIT_SHARED |
1804 ZFCP_STATUS_UNIT_READONLY,
1805 &unit->status);
1806
1807 switch (header->fsf_status) {
1808
1809 case FSF_PORT_HANDLE_NOT_VALID:
1810 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1811 /* fall through */
1812 case FSF_LUN_ALREADY_OPEN:
1813 break;
1814 case FSF_ACCESS_DENIED:
1815 zfcp_fsf_access_denied_unit(req, unit);
1816 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1817 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1818 break;
1819 case FSF_PORT_BOXED:
1820 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1821 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1822 ZFCP_STATUS_FSFREQ_RETRY;
1823 break;
1824 case FSF_LUN_SHARING_VIOLATION:
1825 if (header->fsf_status_qual.word[0])
1826 dev_warn(&adapter->ccw_device->dev,
1827 "LUN 0x%Lx on port 0x%Lx is already in "
1828 "use by CSS%d, MIF Image ID %x\n",
1829 (unsigned long long)unit->fcp_lun,
1830 (unsigned long long)unit->port->wwpn,
1831 queue_designator->cssid,
1832 queue_designator->hla);
1833 else
1834 zfcp_act_eval_err(adapter,
1835 header->fsf_status_qual.word[2]);
1836 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1837 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1838 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1839 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1840 break;
1841 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1842 dev_warn(&adapter->ccw_device->dev,
1843 "No handle is available for LUN "
1844 "0x%016Lx on port 0x%016Lx\n",
1845 (unsigned long long)unit->fcp_lun,
1846 (unsigned long long)unit->port->wwpn);
1847 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1848 /* fall through */
1849 case FSF_INVALID_COMMAND_OPTION:
1850 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1851 break;
1852 case FSF_ADAPTER_STATUS_AVAILABLE:
1853 switch (header->fsf_status_qual.word[0]) {
1854 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1855 zfcp_test_link(unit->port);
1856 /* fall through */
1857 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1858 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1859 break;
1860 }
1861 break;
1862
1863 case FSF_GOOD:
1864 unit->handle = header->lun_handle;
1865 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1866
1867 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1868 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1869 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1870 exclusive = (bottom->lun_access_info &
1871 FSF_UNIT_ACCESS_EXCLUSIVE);
1872 readwrite = (bottom->lun_access_info &
1873 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1874
1875 if (!exclusive)
1876 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1877 &unit->status);
1878
1879 if (!readwrite) {
1880 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1881 &unit->status);
1882 dev_info(&adapter->ccw_device->dev,
1883 "SCSI device at LUN 0x%016Lx on port "
1884 "0x%016Lx opened read-only\n",
1885 (unsigned long long)unit->fcp_lun,
1886 (unsigned long long)unit->port->wwpn);
1887 }
1888
1889 if (exclusive && !readwrite) {
1890 dev_err(&adapter->ccw_device->dev,
1891 "Exclusive read-only access not "
1892 "supported (unit 0x%016Lx, "
1893 "port 0x%016Lx)\n",
1894 (unsigned long long)unit->fcp_lun,
1895 (unsigned long long)unit->port->wwpn);
1896 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1899 } else if (!exclusive && readwrite) {
1900 dev_err(&adapter->ccw_device->dev,
1901 "Shared read-write access not "
1902 "supported (unit 0x%016Lx, port "
1903 "0x%016Lx)\n",
1904 (unsigned long long)unit->fcp_lun,
1905 (unsigned long long)unit->port->wwpn);
1906 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1909 }
1910 }
1911 break;
1912 }
1913}
1914
1915/**
1916 * zfcp_fsf_open_unit - open unit
1917 * @erp_action: pointer to struct zfcp_erp_action
1918 * Returns: 0 on success, error otherwise
1919 */
1920int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1921{
1922 struct qdio_buffer_element *sbale;
1923 struct zfcp_adapter *adapter = erp_action->adapter;
1924 struct zfcp_fsf_req *req;
1925 int retval = -EIO;
1926
1927 spin_lock_bh(&adapter->req_q_lock);
1928 if (zfcp_fsf_req_sbal_get(adapter))
1929 goto out;
1930
1931 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1932 ZFCP_REQ_AUTO_CLEANUP,
1933 adapter->pool.fsf_req_erp);
1934 if (IS_ERR(req)) {
1935 retval = PTR_ERR(req);
1936 goto out;
1937 }
1938
1939 sbale = zfcp_qdio_sbale_req(req);
1940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1942
1943 req->qtcb->header.port_handle = erp_action->port->handle;
1944 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1945 req->handler = zfcp_fsf_open_unit_handler;
1946 req->data = erp_action->unit;
1947 req->erp_action = erp_action;
1948 erp_action->fsf_req = req;
1949
1950 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1951 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1952
1953 zfcp_fsf_start_erp_timer(req);
1954 retval = zfcp_fsf_req_send(req);
1955 if (retval) {
1956 zfcp_fsf_req_free(req);
1957 erp_action->fsf_req = NULL;
1958 }
1959out:
1960 spin_unlock_bh(&adapter->req_q_lock);
1961 return retval;
1962}
1963
1964static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1965{
1966 struct zfcp_unit *unit = req->data;
1967
1968 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1969 return;
1970
1971 switch (req->qtcb->header.fsf_status) {
1972 case FSF_PORT_HANDLE_NOT_VALID:
1973 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
1974 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1975 break;
1976 case FSF_LUN_HANDLE_NOT_VALID:
1977 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
1978 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1979 break;
1980 case FSF_PORT_BOXED:
1981 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
1982 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1983 ZFCP_STATUS_FSFREQ_RETRY;
1984 break;
1985 case FSF_ADAPTER_STATUS_AVAILABLE:
1986 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1987 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1988 zfcp_test_link(unit->port);
1989 /* fall through */
1990 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1991 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1992 break;
1993 }
1994 break;
1995 case FSF_GOOD:
1996 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1997 break;
1998 }
1999}
2000
2001/**
2002 * zfcp_fsf_close_unit - close zfcp unit
2003 * @erp_action: pointer to struct zfcp_unit
2004 * Returns: 0 on success, error otherwise
2005 */
2006int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2007{
2008 struct qdio_buffer_element *sbale;
2009 struct zfcp_adapter *adapter = erp_action->adapter;
2010 struct zfcp_fsf_req *req;
2011 int retval = -EIO;
2012
2013 spin_lock_bh(&adapter->req_q_lock);
2014 if (zfcp_fsf_req_sbal_get(adapter))
2015 goto out;
2016 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2017 ZFCP_REQ_AUTO_CLEANUP,
2018 adapter->pool.fsf_req_erp);
2019 if (IS_ERR(req)) {
2020 retval = PTR_ERR(req);
2021 goto out;
2022 }
2023
2024 sbale = zfcp_qdio_sbale_req(req);
2025 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2026 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2027
2028 req->qtcb->header.port_handle = erp_action->port->handle;
2029 req->qtcb->header.lun_handle = erp_action->unit->handle;
2030 req->handler = zfcp_fsf_close_unit_handler;
2031 req->data = erp_action->unit;
2032 req->erp_action = erp_action;
2033 erp_action->fsf_req = req;
2034
2035 zfcp_fsf_start_erp_timer(req);
2036 retval = zfcp_fsf_req_send(req);
2037 if (retval) {
2038 zfcp_fsf_req_free(req);
2039 erp_action->fsf_req = NULL;
2040 }
2041out:
2042 spin_unlock_bh(&adapter->req_q_lock);
2043 return retval;
2044}
2045
2046static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2047{
2048 lat_rec->sum += lat;
2049 lat_rec->min = min(lat_rec->min, lat);
2050 lat_rec->max = max(lat_rec->max, lat);
2051}
2052
2053static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2054{
2055 struct fsf_qual_latency_info *lat_inf;
2056 struct latency_cont *lat;
2057 struct zfcp_unit *unit = req->unit;
2058
2059 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2060
2061 switch (req->qtcb->bottom.io.data_direction) {
2062 case FSF_DATADIR_READ:
2063 lat = &unit->latencies.read;
2064 break;
2065 case FSF_DATADIR_WRITE:
2066 lat = &unit->latencies.write;
2067 break;
2068 case FSF_DATADIR_CMND:
2069 lat = &unit->latencies.cmd;
2070 break;
2071 default:
2072 return;
2073 }
2074
2075 spin_lock(&unit->latencies.lock);
2076 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2077 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2078 lat->counter++;
2079 spin_unlock(&unit->latencies.lock);
2080}
2081
2082#ifdef CONFIG_BLK_DEV_IO_TRACE
2083static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2084{
2085 struct fsf_qual_latency_info *lat_inf;
2086 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2087 struct request *req = scsi_cmnd->request;
2088 struct zfcp_blk_drv_data trace;
2089 int ticks = fsf_req->adapter->timer_ticks;
2090
2091 trace.flags = 0;
2092 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2093 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2094 trace.flags |= ZFCP_BLK_LAT_VALID;
2095 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2096 trace.channel_lat = lat_inf->channel_lat * ticks;
2097 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2098 }
2099 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2100 trace.flags |= ZFCP_BLK_REQ_ERROR;
2101 trace.inb_usage = fsf_req->qdio_inb_usage;
2102 trace.outb_usage = fsf_req->qdio_outb_usage;
2103
2104 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2105}
2106#else
2107static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2108{
2109}
2110#endif
2111
2112static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2113{
2114 struct scsi_cmnd *scpnt;
2115 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2116 &(req->qtcb->bottom.io.fcp_rsp);
2117 u32 sns_len;
2118 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2119 unsigned long flags;
2120
2121 read_lock_irqsave(&req->adapter->abort_lock, flags);
2122
2123 scpnt = req->data;
2124 if (unlikely(!scpnt)) {
2125 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2126 return;
2127 }
2128
2129 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2130 set_host_byte(scpnt, DID_SOFT_ERROR);
2131 goto skip_fsfstatus;
2132 }
2133
2134 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2135 set_host_byte(scpnt, DID_ERROR);
2136 goto skip_fsfstatus;
2137 }
2138
2139 set_msg_byte(scpnt, COMMAND_COMPLETE);
2140
2141 scpnt->result |= fcp_rsp_iu->scsi_status;
2142
2143 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2144 zfcp_fsf_req_latency(req);
2145
2146 zfcp_fsf_trace_latency(req);
2147
2148 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2149 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2150 set_host_byte(scpnt, DID_OK);
2151 else {
2152 set_host_byte(scpnt, DID_ERROR);
2153 goto skip_fsfstatus;
2154 }
2155 }
2156
2157 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2158 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2159 fcp_rsp_iu->fcp_rsp_len;
2160 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2161 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2162
2163 memcpy(scpnt->sense_buffer,
2164 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2165 }
2166
2167 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2168 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2169 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2170 scpnt->underflow)
2171 set_host_byte(scpnt, DID_ERROR);
2172 }
2173skip_fsfstatus:
2174 if (scpnt->result != 0)
2175 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2176 else if (scpnt->retries > 0)
2177 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2178 else
2179 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2180
2181 scpnt->host_scribble = NULL;
2182 (scpnt->scsi_done) (scpnt);
2183 /*
2184 * We must hold this lock until scsi_done has been called.
2185 * Otherwise we may call scsi_done after abort regarding this
2186 * command has completed.
2187 * Note: scsi_done must not block!
2188 */
2189 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2190}
2191
2192static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2193{
2194 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2195 &(req->qtcb->bottom.io.fcp_rsp);
2196 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2197
2198 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2199 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2200 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2201}
2202
2203
2204static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2205{
2206 struct zfcp_unit *unit;
2207 struct fsf_qtcb_header *header = &req->qtcb->header;
2208
2209 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2210 unit = req->data;
2211 else
2212 unit = req->unit;
2213
2214 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2215 goto skip_fsfstatus;
2216
2217 switch (header->fsf_status) {
2218 case FSF_HANDLE_MISMATCH:
2219 case FSF_PORT_HANDLE_NOT_VALID:
2220 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2221 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2222 break;
2223 case FSF_FCPLUN_NOT_VALID:
2224 case FSF_LUN_HANDLE_NOT_VALID:
2225 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2226 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2227 break;
2228 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2229 zfcp_fsf_class_not_supp(req);
2230 break;
2231 case FSF_ACCESS_DENIED:
2232 zfcp_fsf_access_denied_unit(req, unit);
2233 break;
2234 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2235 dev_err(&req->adapter->ccw_device->dev,
2236 "Incorrect direction %d, unit 0x%016Lx on port "
2237 "0x%016Lx closed\n",
2238 req->qtcb->bottom.io.data_direction,
2239 (unsigned long long)unit->fcp_lun,
2240 (unsigned long long)unit->port->wwpn);
2241 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2242 req);
2243 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2244 break;
2245 case FSF_CMND_LENGTH_NOT_VALID:
2246 dev_err(&req->adapter->ccw_device->dev,
2247 "Incorrect CDB length %d, unit 0x%016Lx on "
2248 "port 0x%016Lx closed\n",
2249 req->qtcb->bottom.io.fcp_cmnd_length,
2250 (unsigned long long)unit->fcp_lun,
2251 (unsigned long long)unit->port->wwpn);
2252 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2253 req);
2254 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255 break;
2256 case FSF_PORT_BOXED:
2257 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2258 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2259 ZFCP_STATUS_FSFREQ_RETRY;
2260 break;
2261 case FSF_LUN_BOXED:
2262 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2263 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2264 ZFCP_STATUS_FSFREQ_RETRY;
2265 break;
2266 case FSF_ADAPTER_STATUS_AVAILABLE:
2267 if (header->fsf_status_qual.word[0] ==
2268 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2269 zfcp_test_link(unit->port);
2270 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2271 break;
2272 }
2273skip_fsfstatus:
2274 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2275 zfcp_fsf_send_fcp_ctm_handler(req);
2276 else {
2277 zfcp_fsf_send_fcp_command_task_handler(req);
2278 req->unit = NULL;
2279 zfcp_unit_put(unit);
2280 }
2281}
2282
2283static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2284{
2285 u32 *fcp_dl_ptr;
2286
2287 /*
2288 * fcp_dl_addr = start address of fcp_cmnd structure +
2289 * size of fixed part + size of dynamically sized add_dcp_cdb field
2290 * SEE FCP-2 documentation
2291 */
2292 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2293 (fcp_cmd->add_fcp_cdb_length << 2));
2294 *fcp_dl_ptr = fcp_dl;
2295}
2296
2297/**
2298 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2299 * @unit: unit where command is sent to
2300 * @scsi_cmnd: scsi command to be sent
2301 */
2302int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2303 struct scsi_cmnd *scsi_cmnd)
2304{
2305 struct zfcp_fsf_req *req;
2306 struct fcp_cmnd_iu *fcp_cmnd_iu;
2307 unsigned int sbtype;
2308 int real_bytes, retval = -EIO;
2309 struct zfcp_adapter *adapter = unit->port->adapter;
2310
2311 if (unlikely(!(atomic_read(&unit->status) &
2312 ZFCP_STATUS_COMMON_UNBLOCKED)))
2313 return -EBUSY;
2314
2315 spin_lock(&adapter->req_q_lock);
2316 if (atomic_read(&adapter->req_q.count) <= 0) {
2317 atomic_inc(&adapter->qdio_outb_full);
2318 goto out;
2319 }
2320 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2321 ZFCP_REQ_AUTO_CLEANUP,
2322 adapter->pool.fsf_req_scsi);
2323 if (IS_ERR(req)) {
2324 retval = PTR_ERR(req);
2325 goto out;
2326 }
2327
2328 zfcp_unit_get(unit);
2329 req->unit = unit;
2330 req->data = scsi_cmnd;
2331 req->handler = zfcp_fsf_send_fcp_command_handler;
2332 req->qtcb->header.lun_handle = unit->handle;
2333 req->qtcb->header.port_handle = unit->port->handle;
2334 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2335
2336 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2337
2338 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2339 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2340 /*
2341 * set depending on data direction:
2342 * data direction bits in SBALE (SB Type)
2343 * data direction bits in QTCB
2344 * data direction bits in FCP_CMND IU
2345 */
2346 switch (scsi_cmnd->sc_data_direction) {
2347 case DMA_NONE:
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349 sbtype = SBAL_FLAGS0_TYPE_READ;
2350 break;
2351 case DMA_FROM_DEVICE:
2352 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2353 sbtype = SBAL_FLAGS0_TYPE_READ;
2354 fcp_cmnd_iu->rddata = 1;
2355 break;
2356 case DMA_TO_DEVICE:
2357 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2358 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2359 fcp_cmnd_iu->wddata = 1;
2360 break;
2361 case DMA_BIDIRECTIONAL:
2362 default:
2363 retval = -EIO;
2364 goto failed_scsi_cmnd;
2365 }
2366
2367 if (likely((scsi_cmnd->device->simple_tags) ||
2368 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2369 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2370 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2371 else
2372 fcp_cmnd_iu->task_attribute = UNTAGGED;
2373
2374 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2375 fcp_cmnd_iu->add_fcp_cdb_length =
2376 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2377
2378 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2379
2380 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2381 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2382
2383 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2384 scsi_sglist(scsi_cmnd),
2385 FSF_MAX_SBALS_PER_REQ);
2386 if (unlikely(real_bytes < 0)) {
2387 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2388 retval = -EIO;
2389 else {
2390 dev_err(&adapter->ccw_device->dev,
2391 "Oversize data package, unit 0x%016Lx "
2392 "on port 0x%016Lx closed\n",
2393 (unsigned long long)unit->fcp_lun,
2394 (unsigned long long)unit->port->wwpn);
2395 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2396 retval = -EINVAL;
2397 }
2398 goto failed_scsi_cmnd;
2399 }
2400
2401 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2402
2403 retval = zfcp_fsf_req_send(req);
2404 if (unlikely(retval))
2405 goto failed_scsi_cmnd;
2406
2407 goto out;
2408
2409failed_scsi_cmnd:
2410 zfcp_unit_put(unit);
2411 zfcp_fsf_req_free(req);
2412 scsi_cmnd->host_scribble = NULL;
2413out:
2414 spin_unlock(&adapter->req_q_lock);
2415 return retval;
2416}
2417
2418/**
2419 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2420 * @unit: pointer to struct zfcp_unit
2421 * @tm_flags: unsigned byte for task management flags
2422 * Returns: on success pointer to struct fsf_req, NULL otherwise
2423 */
2424struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2425{
2426 struct qdio_buffer_element *sbale;
2427 struct zfcp_fsf_req *req = NULL;
2428 struct fcp_cmnd_iu *fcp_cmnd_iu;
2429 struct zfcp_adapter *adapter = unit->port->adapter;
2430
2431 if (unlikely(!(atomic_read(&unit->status) &
2432 ZFCP_STATUS_COMMON_UNBLOCKED)))
2433 return NULL;
2434
2435 spin_lock_bh(&adapter->req_q_lock);
2436 if (zfcp_fsf_req_sbal_get(adapter))
2437 goto out;
2438 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
2439 adapter->pool.fsf_req_scsi);
2440 if (IS_ERR(req)) {
2441 req = NULL;
2442 goto out;
2443 }
2444
2445 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2446 req->data = unit;
2447 req->handler = zfcp_fsf_send_fcp_command_handler;
2448 req->qtcb->header.lun_handle = unit->handle;
2449 req->qtcb->header.port_handle = unit->port->handle;
2450 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2451 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2452 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2453 sizeof(u32);
2454
2455 sbale = zfcp_qdio_sbale_req(req);
2456 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2457 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2458
2459 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2460 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2461 fcp_cmnd_iu->task_management_flags = tm_flags;
2462
2463 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2464 if (!zfcp_fsf_req_send(req))
2465 goto out;
2466
2467 zfcp_fsf_req_free(req);
2468 req = NULL;
2469out:
2470 spin_unlock_bh(&adapter->req_q_lock);
2471 return req;
2472}
2473
2474static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2475{
2476 if (req->qtcb->header.fsf_status != FSF_GOOD)
2477 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2478}
2479
2480/**
2481 * zfcp_fsf_control_file - control file upload/download
2482 * @adapter: pointer to struct zfcp_adapter
2483 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2484 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2485 */
2486struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2487 struct zfcp_fsf_cfdc *fsf_cfdc)
2488{
2489 struct qdio_buffer_element *sbale;
2490 struct zfcp_fsf_req *req = NULL;
2491 struct fsf_qtcb_bottom_support *bottom;
2492 int direction, retval = -EIO, bytes;
2493
2494 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2495 return ERR_PTR(-EOPNOTSUPP);
2496
2497 switch (fsf_cfdc->command) {
2498 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2499 direction = SBAL_FLAGS0_TYPE_WRITE;
2500 break;
2501 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2502 direction = SBAL_FLAGS0_TYPE_READ;
2503 break;
2504 default:
2505 return ERR_PTR(-EINVAL);
2506 }
2507
2508 spin_lock_bh(&adapter->req_q_lock);
2509 if (zfcp_fsf_req_sbal_get(adapter))
2510 goto out;
2511
2512 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2513 if (IS_ERR(req)) {
2514 retval = -EPERM;
2515 goto out;
2516 }
2517
2518 req->handler = zfcp_fsf_control_file_handler;
2519
2520 sbale = zfcp_qdio_sbale_req(req);
2521 sbale[0].flags |= direction;
2522
2523 bottom = &req->qtcb->bottom.support;
2524 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2525 bottom->option = fsf_cfdc->option;
2526
2527 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2528 FSF_MAX_SBALS_PER_REQ);
2529 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2530 retval = -ENOMEM;
2531 zfcp_fsf_req_free(req);
2532 goto out;
2533 }
2534
2535 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2536 retval = zfcp_fsf_req_send(req);
2537out:
2538 spin_unlock_bh(&adapter->req_q_lock);
2539
2540 if (!retval) {
2541 wait_event(req->completion_wq,
2542 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2543 return req;
2544 }
2545 return ERR_PTR(retval);
2546}
Linux kernel - Deliverables
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