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[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2010
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <linux/slab.h>
14 #include <scsi/fc/fc_els.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17 #include "zfcp_dbf.h"
18 #include "zfcp_qdio.h"
19 #include "zfcp_reqlist.h"
20
21 static void zfcp_fsf_request_timeout_handler(unsigned long data)
22 {
23 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
24 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
25 "fsrth_1", NULL);
26 }
27
28 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
29 unsigned long timeout)
30 {
31 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
32 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
33 fsf_req->timer.expires = jiffies + timeout;
34 add_timer(&fsf_req->timer);
35 }
36
37 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
38 {
39 BUG_ON(!fsf_req->erp_action);
40 fsf_req->timer.function = zfcp_erp_timeout_handler;
41 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
42 fsf_req->timer.expires = jiffies + 30 * HZ;
43 add_timer(&fsf_req->timer);
44 }
45
46 /* association between FSF command and FSF QTCB type */
47 static u32 fsf_qtcb_type[] = {
48 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
49 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
56 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
58 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
59 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
61 };
62
63 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
64 {
65 u16 subtable = table >> 16;
66 u16 rule = table & 0xffff;
67 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
68
69 if (subtable && subtable < ARRAY_SIZE(act_type))
70 dev_warn(&adapter->ccw_device->dev,
71 "Access denied according to ACT rule type %s, "
72 "rule %d\n", act_type[subtable], rule);
73 }
74
75 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
76 struct zfcp_port *port)
77 {
78 struct fsf_qtcb_header *header = &req->qtcb->header;
79 dev_warn(&req->adapter->ccw_device->dev,
80 "Access denied to port 0x%016Lx\n",
81 (unsigned long long)port->wwpn);
82 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
83 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
84 zfcp_erp_port_access_denied(port, "fspad_1", req);
85 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
86 }
87
88 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
89 struct zfcp_unit *unit)
90 {
91 struct fsf_qtcb_header *header = &req->qtcb->header;
92 dev_warn(&req->adapter->ccw_device->dev,
93 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
94 (unsigned long long)unit->fcp_lun,
95 (unsigned long long)unit->port->wwpn);
96 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
97 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
98 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
99 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
100 }
101
102 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
103 {
104 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
105 "operational because of an unsupported FC class\n");
106 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
107 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
108 }
109
110 /**
111 * zfcp_fsf_req_free - free memory used by fsf request
112 * @fsf_req: pointer to struct zfcp_fsf_req
113 */
114 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
115 {
116 if (likely(req->pool)) {
117 if (likely(req->qtcb))
118 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
119 mempool_free(req, req->pool);
120 return;
121 }
122
123 if (likely(req->qtcb))
124 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
125 kfree(req);
126 }
127
128 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
129 {
130 unsigned long flags;
131 struct fsf_status_read_buffer *sr_buf = req->data;
132 struct zfcp_adapter *adapter = req->adapter;
133 struct zfcp_port *port;
134 int d_id = ntoh24(sr_buf->d_id);
135
136 read_lock_irqsave(&adapter->port_list_lock, flags);
137 list_for_each_entry(port, &adapter->port_list, list)
138 if (port->d_id == d_id) {
139 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
140 break;
141 }
142 read_unlock_irqrestore(&adapter->port_list_lock, flags);
143 }
144
145 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
146 struct fsf_link_down_info *link_down)
147 {
148 struct zfcp_adapter *adapter = req->adapter;
149
150 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
151 return;
152
153 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
154
155 zfcp_scsi_schedule_rports_block(adapter);
156
157 if (!link_down)
158 goto out;
159
160 switch (link_down->error_code) {
161 case FSF_PSQ_LINK_NO_LIGHT:
162 dev_warn(&req->adapter->ccw_device->dev,
163 "There is no light signal from the local "
164 "fibre channel cable\n");
165 break;
166 case FSF_PSQ_LINK_WRAP_PLUG:
167 dev_warn(&req->adapter->ccw_device->dev,
168 "There is a wrap plug instead of a fibre "
169 "channel cable\n");
170 break;
171 case FSF_PSQ_LINK_NO_FCP:
172 dev_warn(&req->adapter->ccw_device->dev,
173 "The adjacent fibre channel node does not "
174 "support FCP\n");
175 break;
176 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
177 dev_warn(&req->adapter->ccw_device->dev,
178 "The FCP device is suspended because of a "
179 "firmware update\n");
180 break;
181 case FSF_PSQ_LINK_INVALID_WWPN:
182 dev_warn(&req->adapter->ccw_device->dev,
183 "The FCP device detected a WWPN that is "
184 "duplicate or not valid\n");
185 break;
186 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
187 dev_warn(&req->adapter->ccw_device->dev,
188 "The fibre channel fabric does not support NPIV\n");
189 break;
190 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "The FCP adapter cannot support more NPIV ports\n");
193 break;
194 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
195 dev_warn(&req->adapter->ccw_device->dev,
196 "The adjacent switch cannot support "
197 "more NPIV ports\n");
198 break;
199 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
200 dev_warn(&req->adapter->ccw_device->dev,
201 "The FCP adapter could not log in to the "
202 "fibre channel fabric\n");
203 break;
204 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
205 dev_warn(&req->adapter->ccw_device->dev,
206 "The WWPN assignment file on the FCP adapter "
207 "has been damaged\n");
208 break;
209 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
210 dev_warn(&req->adapter->ccw_device->dev,
211 "The mode table on the FCP adapter "
212 "has been damaged\n");
213 break;
214 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
215 dev_warn(&req->adapter->ccw_device->dev,
216 "All NPIV ports on the FCP adapter have "
217 "been assigned\n");
218 break;
219 default:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The link between the FCP adapter and "
222 "the FC fabric is down\n");
223 }
224 out:
225 zfcp_erp_adapter_failed(adapter, id, req);
226 }
227
228 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
229 {
230 struct fsf_status_read_buffer *sr_buf = req->data;
231 struct fsf_link_down_info *ldi =
232 (struct fsf_link_down_info *) &sr_buf->payload;
233
234 switch (sr_buf->status_subtype) {
235 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
236 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
237 break;
238 case FSF_STATUS_READ_SUB_FDISC_FAILED:
239 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
240 break;
241 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
242 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
243 };
244 }
245
246 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
247 {
248 struct zfcp_adapter *adapter = req->adapter;
249 struct fsf_status_read_buffer *sr_buf = req->data;
250
251 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
252 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
253 mempool_free(sr_buf, adapter->pool.status_read_data);
254 zfcp_fsf_req_free(req);
255 return;
256 }
257
258 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
259
260 switch (sr_buf->status_type) {
261 case FSF_STATUS_READ_PORT_CLOSED:
262 zfcp_fsf_status_read_port_closed(req);
263 break;
264 case FSF_STATUS_READ_INCOMING_ELS:
265 zfcp_fc_incoming_els(req);
266 break;
267 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
268 break;
269 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
270 dev_warn(&adapter->ccw_device->dev,
271 "The error threshold for checksum statistics "
272 "has been exceeded\n");
273 zfcp_dbf_hba_berr(adapter->dbf, req);
274 break;
275 case FSF_STATUS_READ_LINK_DOWN:
276 zfcp_fsf_status_read_link_down(req);
277 break;
278 case FSF_STATUS_READ_LINK_UP:
279 dev_info(&adapter->ccw_device->dev,
280 "The local link has been restored\n");
281 /* All ports should be marked as ready to run again */
282 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
283 ZFCP_STATUS_COMMON_RUNNING,
284 ZFCP_SET);
285 zfcp_erp_adapter_reopen(adapter,
286 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
287 ZFCP_STATUS_COMMON_ERP_FAILED,
288 "fssrh_2", req);
289 break;
290 case FSF_STATUS_READ_NOTIFICATION_LOST:
291 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
292 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
293 req);
294 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
295 queue_work(adapter->work_queue, &adapter->scan_work);
296 break;
297 case FSF_STATUS_READ_CFDC_UPDATED:
298 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
299 break;
300 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
301 adapter->adapter_features = sr_buf->payload.word[0];
302 break;
303 }
304
305 mempool_free(sr_buf, adapter->pool.status_read_data);
306 zfcp_fsf_req_free(req);
307
308 atomic_inc(&adapter->stat_miss);
309 queue_work(adapter->work_queue, &adapter->stat_work);
310 }
311
312 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
313 {
314 switch (req->qtcb->header.fsf_status_qual.word[0]) {
315 case FSF_SQ_FCP_RSP_AVAILABLE:
316 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
317 case FSF_SQ_NO_RETRY_POSSIBLE:
318 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
319 return;
320 case FSF_SQ_COMMAND_ABORTED:
321 break;
322 case FSF_SQ_NO_RECOM:
323 dev_err(&req->adapter->ccw_device->dev,
324 "The FCP adapter reported a problem "
325 "that cannot be recovered\n");
326 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
327 break;
328 }
329 /* all non-return stats set FSFREQ_ERROR*/
330 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
331 }
332
333 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
334 {
335 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
336 return;
337
338 switch (req->qtcb->header.fsf_status) {
339 case FSF_UNKNOWN_COMMAND:
340 dev_err(&req->adapter->ccw_device->dev,
341 "The FCP adapter does not recognize the command 0x%x\n",
342 req->qtcb->header.fsf_command);
343 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
344 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
345 break;
346 case FSF_ADAPTER_STATUS_AVAILABLE:
347 zfcp_fsf_fsfstatus_qual_eval(req);
348 break;
349 }
350 }
351
352 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
353 {
354 struct zfcp_adapter *adapter = req->adapter;
355 struct fsf_qtcb *qtcb = req->qtcb;
356 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
357
358 zfcp_dbf_hba_fsf_response(req);
359
360 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
361 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
362 return;
363 }
364
365 switch (qtcb->prefix.prot_status) {
366 case FSF_PROT_GOOD:
367 case FSF_PROT_FSF_STATUS_PRESENTED:
368 return;
369 case FSF_PROT_QTCB_VERSION_ERROR:
370 dev_err(&adapter->ccw_device->dev,
371 "QTCB version 0x%x not supported by FCP adapter "
372 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
373 psq->word[0], psq->word[1]);
374 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
375 break;
376 case FSF_PROT_ERROR_STATE:
377 case FSF_PROT_SEQ_NUMB_ERROR:
378 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
379 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
380 break;
381 case FSF_PROT_UNSUPP_QTCB_TYPE:
382 dev_err(&adapter->ccw_device->dev,
383 "The QTCB type is not supported by the FCP adapter\n");
384 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
385 break;
386 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
387 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
388 &adapter->status);
389 break;
390 case FSF_PROT_DUPLICATE_REQUEST_ID:
391 dev_err(&adapter->ccw_device->dev,
392 "0x%Lx is an ambiguous request identifier\n",
393 (unsigned long long)qtcb->bottom.support.req_handle);
394 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
395 break;
396 case FSF_PROT_LINK_DOWN:
397 zfcp_fsf_link_down_info_eval(req, "fspse_5",
398 &psq->link_down_info);
399 /* go through reopen to flush pending requests */
400 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
401 break;
402 case FSF_PROT_REEST_QUEUE:
403 /* All ports should be marked as ready to run again */
404 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
405 ZFCP_STATUS_COMMON_RUNNING,
406 ZFCP_SET);
407 zfcp_erp_adapter_reopen(adapter,
408 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
409 ZFCP_STATUS_COMMON_ERP_FAILED,
410 "fspse_8", req);
411 break;
412 default:
413 dev_err(&adapter->ccw_device->dev,
414 "0x%x is not a valid transfer protocol status\n",
415 qtcb->prefix.prot_status);
416 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
417 }
418 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
419 }
420
421 /**
422 * zfcp_fsf_req_complete - process completion of a FSF request
423 * @fsf_req: The FSF request that has been completed.
424 *
425 * When a request has been completed either from the FCP adapter,
426 * or it has been dismissed due to a queue shutdown, this function
427 * is called to process the completion status and trigger further
428 * events related to the FSF request.
429 */
430 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
431 {
432 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
433 zfcp_fsf_status_read_handler(req);
434 return;
435 }
436
437 del_timer(&req->timer);
438 zfcp_fsf_protstatus_eval(req);
439 zfcp_fsf_fsfstatus_eval(req);
440 req->handler(req);
441
442 if (req->erp_action)
443 zfcp_erp_notify(req->erp_action, 0);
444
445 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
446 zfcp_fsf_req_free(req);
447 else
448 complete(&req->completion);
449 }
450
451 /**
452 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
453 * @adapter: pointer to struct zfcp_adapter
454 *
455 * Never ever call this without shutting down the adapter first.
456 * Otherwise the adapter would continue using and corrupting s390 storage.
457 * Included BUG_ON() call to ensure this is done.
458 * ERP is supposed to be the only user of this function.
459 */
460 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
461 {
462 struct zfcp_fsf_req *req, *tmp;
463 LIST_HEAD(remove_queue);
464
465 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
466 zfcp_reqlist_move(adapter->req_list, &remove_queue);
467
468 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
469 list_del(&req->list);
470 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
471 zfcp_fsf_req_complete(req);
472 }
473 }
474
475 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
476 {
477 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
478 struct zfcp_adapter *adapter = req->adapter;
479 struct Scsi_Host *shost = adapter->scsi_host;
480 struct fc_els_flogi *nsp, *plogi;
481
482 /* adjust pointers for missing command code */
483 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
484 - sizeof(u32));
485 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
486 - sizeof(u32));
487
488 if (req->data)
489 memcpy(req->data, bottom, sizeof(*bottom));
490
491 fc_host_port_name(shost) = nsp->fl_wwpn;
492 fc_host_node_name(shost) = nsp->fl_wwnn;
493 fc_host_port_id(shost) = ntoh24(bottom->s_id);
494 fc_host_speed(shost) = bottom->fc_link_speed;
495 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
496
497 adapter->hydra_version = bottom->adapter_type;
498 adapter->timer_ticks = bottom->timer_interval;
499
500 if (fc_host_permanent_port_name(shost) == -1)
501 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
502
503 switch (bottom->fc_topology) {
504 case FSF_TOPO_P2P:
505 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
506 adapter->peer_wwpn = plogi->fl_wwpn;
507 adapter->peer_wwnn = plogi->fl_wwnn;
508 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
509 break;
510 case FSF_TOPO_FABRIC:
511 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
512 break;
513 case FSF_TOPO_AL:
514 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
515 /* fall through */
516 default:
517 dev_err(&adapter->ccw_device->dev,
518 "Unknown or unsupported arbitrated loop "
519 "fibre channel topology detected\n");
520 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
521 return -EIO;
522 }
523
524 return 0;
525 }
526
527 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
528 {
529 struct zfcp_adapter *adapter = req->adapter;
530 struct fsf_qtcb *qtcb = req->qtcb;
531 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
532 struct Scsi_Host *shost = adapter->scsi_host;
533
534 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
535 return;
536
537 adapter->fsf_lic_version = bottom->lic_version;
538 adapter->adapter_features = bottom->adapter_features;
539 adapter->connection_features = bottom->connection_features;
540 adapter->peer_wwpn = 0;
541 adapter->peer_wwnn = 0;
542 adapter->peer_d_id = 0;
543
544 switch (qtcb->header.fsf_status) {
545 case FSF_GOOD:
546 if (zfcp_fsf_exchange_config_evaluate(req))
547 return;
548
549 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
550 dev_err(&adapter->ccw_device->dev,
551 "FCP adapter maximum QTCB size (%d bytes) "
552 "is too small\n",
553 bottom->max_qtcb_size);
554 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
555 return;
556 }
557 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
558 &adapter->status);
559 break;
560 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
561 fc_host_node_name(shost) = 0;
562 fc_host_port_name(shost) = 0;
563 fc_host_port_id(shost) = 0;
564 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
565 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
566 adapter->hydra_version = 0;
567
568 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
569 &adapter->status);
570
571 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
572 &qtcb->header.fsf_status_qual.link_down_info);
573 break;
574 default:
575 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
576 return;
577 }
578
579 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
580 adapter->hardware_version = bottom->hardware_version;
581 memcpy(fc_host_serial_number(shost), bottom->serial_number,
582 min(FC_SERIAL_NUMBER_SIZE, 17));
583 EBCASC(fc_host_serial_number(shost),
584 min(FC_SERIAL_NUMBER_SIZE, 17));
585 }
586
587 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
588 dev_err(&adapter->ccw_device->dev,
589 "The FCP adapter only supports newer "
590 "control block versions\n");
591 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
592 return;
593 }
594 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
595 dev_err(&adapter->ccw_device->dev,
596 "The FCP adapter only supports older "
597 "control block versions\n");
598 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
599 }
600 }
601
602 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
603 {
604 struct zfcp_adapter *adapter = req->adapter;
605 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
606 struct Scsi_Host *shost = adapter->scsi_host;
607
608 if (req->data)
609 memcpy(req->data, bottom, sizeof(*bottom));
610
611 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
612 fc_host_permanent_port_name(shost) = bottom->wwpn;
613 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
614 } else
615 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
616 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
617 fc_host_supported_speeds(shost) = bottom->supported_speed;
618 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
619 FC_FC4_LIST_SIZE);
620 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
621 FC_FC4_LIST_SIZE);
622 }
623
624 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
625 {
626 struct fsf_qtcb *qtcb = req->qtcb;
627
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
629 return;
630
631 switch (qtcb->header.fsf_status) {
632 case FSF_GOOD:
633 zfcp_fsf_exchange_port_evaluate(req);
634 break;
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
637 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
638 &qtcb->header.fsf_status_qual.link_down_info);
639 break;
640 }
641 }
642
643 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
644 {
645 struct zfcp_qdio_queue *req_q = &qdio->req_q;
646
647 spin_lock_bh(&qdio->req_q_lock);
648 if (atomic_read(&req_q->count))
649 return 1;
650 spin_unlock_bh(&qdio->req_q_lock);
651 return 0;
652 }
653
654 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
655 {
656 struct zfcp_adapter *adapter = qdio->adapter;
657 long ret;
658
659 spin_unlock_bh(&qdio->req_q_lock);
660 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
661 zfcp_fsf_sbal_check(qdio), 5 * HZ);
662 if (ret > 0)
663 return 0;
664 if (!ret) {
665 atomic_inc(&qdio->req_q_full);
666 /* assume hanging outbound queue, try queue recovery */
667 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
668 }
669
670 spin_lock_bh(&qdio->req_q_lock);
671 return -EIO;
672 }
673
674 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
675 {
676 struct zfcp_fsf_req *req;
677
678 if (likely(pool))
679 req = mempool_alloc(pool, GFP_ATOMIC);
680 else
681 req = kmalloc(sizeof(*req), GFP_ATOMIC);
682
683 if (unlikely(!req))
684 return NULL;
685
686 memset(req, 0, sizeof(*req));
687 req->pool = pool;
688 return req;
689 }
690
691 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
692 {
693 struct fsf_qtcb *qtcb;
694
695 if (likely(pool))
696 qtcb = mempool_alloc(pool, GFP_ATOMIC);
697 else
698 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
699
700 if (unlikely(!qtcb))
701 return NULL;
702
703 memset(qtcb, 0, sizeof(*qtcb));
704 return qtcb;
705 }
706
707 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
708 u32 fsf_cmd, mempool_t *pool)
709 {
710 struct qdio_buffer_element *sbale;
711 struct zfcp_qdio_queue *req_q = &qdio->req_q;
712 struct zfcp_adapter *adapter = qdio->adapter;
713 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
714
715 if (unlikely(!req))
716 return ERR_PTR(-ENOMEM);
717
718 if (adapter->req_no == 0)
719 adapter->req_no++;
720
721 INIT_LIST_HEAD(&req->list);
722 init_timer(&req->timer);
723 init_completion(&req->completion);
724
725 req->adapter = adapter;
726 req->fsf_command = fsf_cmd;
727 req->req_id = adapter->req_no;
728 req->qdio_req.sbal_number = 1;
729 req->qdio_req.sbal_first = req_q->first;
730 req->qdio_req.sbal_last = req_q->first;
731 req->qdio_req.sbale_curr = 1;
732
733 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
734 sbale[0].addr = (void *) req->req_id;
735 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
736
737 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
738 if (likely(pool))
739 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
740 else
741 req->qtcb = zfcp_qtcb_alloc(NULL);
742
743 if (unlikely(!req->qtcb)) {
744 zfcp_fsf_req_free(req);
745 return ERR_PTR(-ENOMEM);
746 }
747
748 req->seq_no = adapter->fsf_req_seq_no;
749 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_id = req->req_id;
751 req->qtcb->prefix.ulp_info = 26;
752 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
753 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
754 req->qtcb->header.req_handle = req->req_id;
755 req->qtcb->header.fsf_command = req->fsf_command;
756 sbale[1].addr = (void *) req->qtcb;
757 sbale[1].length = sizeof(struct fsf_qtcb);
758 }
759
760 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
761 zfcp_fsf_req_free(req);
762 return ERR_PTR(-EIO);
763 }
764
765 return req;
766 }
767
768 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
769 {
770 struct zfcp_adapter *adapter = req->adapter;
771 struct zfcp_qdio *qdio = adapter->qdio;
772 int with_qtcb = (req->qtcb != NULL);
773 int req_id = req->req_id;
774
775 zfcp_reqlist_add(adapter->req_list, req);
776
777 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
778 req->issued = get_clock();
779 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
780 del_timer(&req->timer);
781 /* lookup request again, list might have changed */
782 zfcp_reqlist_find_rm(adapter->req_list, req_id);
783 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
784 return -EIO;
785 }
786
787 /* Don't increase for unsolicited status */
788 if (with_qtcb)
789 adapter->fsf_req_seq_no++;
790 adapter->req_no++;
791
792 return 0;
793 }
794
795 /**
796 * zfcp_fsf_status_read - send status read request
797 * @adapter: pointer to struct zfcp_adapter
798 * @req_flags: request flags
799 * Returns: 0 on success, ERROR otherwise
800 */
801 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
802 {
803 struct zfcp_adapter *adapter = qdio->adapter;
804 struct zfcp_fsf_req *req;
805 struct fsf_status_read_buffer *sr_buf;
806 struct qdio_buffer_element *sbale;
807 int retval = -EIO;
808
809 spin_lock_bh(&qdio->req_q_lock);
810 if (zfcp_fsf_req_sbal_get(qdio))
811 goto out;
812
813 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
814 adapter->pool.status_read_req);
815 if (IS_ERR(req)) {
816 retval = PTR_ERR(req);
817 goto out;
818 }
819
820 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
821 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
822 req->qdio_req.sbale_curr = 2;
823
824 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
825 if (!sr_buf) {
826 retval = -ENOMEM;
827 goto failed_buf;
828 }
829 memset(sr_buf, 0, sizeof(*sr_buf));
830 req->data = sr_buf;
831 sbale = zfcp_qdio_sbale_curr(qdio, &req->qdio_req);
832 sbale->addr = (void *) sr_buf;
833 sbale->length = sizeof(*sr_buf);
834
835 retval = zfcp_fsf_req_send(req);
836 if (retval)
837 goto failed_req_send;
838
839 goto out;
840
841 failed_req_send:
842 mempool_free(sr_buf, adapter->pool.status_read_data);
843 failed_buf:
844 zfcp_fsf_req_free(req);
845 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
846 out:
847 spin_unlock_bh(&qdio->req_q_lock);
848 return retval;
849 }
850
851 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
852 {
853 struct zfcp_unit *unit = req->data;
854 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
855
856 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
857 return;
858
859 switch (req->qtcb->header.fsf_status) {
860 case FSF_PORT_HANDLE_NOT_VALID:
861 if (fsq->word[0] == fsq->word[1]) {
862 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
863 "fsafch1", req);
864 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
865 }
866 break;
867 case FSF_LUN_HANDLE_NOT_VALID:
868 if (fsq->word[0] == fsq->word[1]) {
869 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
871 }
872 break;
873 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
874 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
875 break;
876 case FSF_PORT_BOXED:
877 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
878 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
879 break;
880 case FSF_LUN_BOXED:
881 zfcp_erp_unit_boxed(unit, "fsafch4", req);
882 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
883 break;
884 case FSF_ADAPTER_STATUS_AVAILABLE:
885 switch (fsq->word[0]) {
886 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
887 zfcp_fc_test_link(unit->port);
888 /* fall through */
889 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
890 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
891 break;
892 }
893 break;
894 case FSF_GOOD:
895 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
896 break;
897 }
898 }
899
900 /**
901 * zfcp_fsf_abort_fcp_command - abort running SCSI command
902 * @old_req_id: unsigned long
903 * @unit: pointer to struct zfcp_unit
904 * Returns: pointer to struct zfcp_fsf_req
905 */
906
907 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
908 struct zfcp_unit *unit)
909 {
910 struct qdio_buffer_element *sbale;
911 struct zfcp_fsf_req *req = NULL;
912 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
913
914 spin_lock_bh(&qdio->req_q_lock);
915 if (zfcp_fsf_req_sbal_get(qdio))
916 goto out;
917 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
918 qdio->adapter->pool.scsi_abort);
919 if (IS_ERR(req)) {
920 req = NULL;
921 goto out;
922 }
923
924 if (unlikely(!(atomic_read(&unit->status) &
925 ZFCP_STATUS_COMMON_UNBLOCKED)))
926 goto out_error_free;
927
928 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
929 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
930 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
931
932 req->data = unit;
933 req->handler = zfcp_fsf_abort_fcp_command_handler;
934 req->qtcb->header.lun_handle = unit->handle;
935 req->qtcb->header.port_handle = unit->port->handle;
936 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
937
938 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
939 if (!zfcp_fsf_req_send(req))
940 goto out;
941
942 out_error_free:
943 zfcp_fsf_req_free(req);
944 req = NULL;
945 out:
946 spin_unlock_bh(&qdio->req_q_lock);
947 return req;
948 }
949
950 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
951 {
952 struct zfcp_adapter *adapter = req->adapter;
953 struct zfcp_fsf_ct_els *ct = req->data;
954 struct fsf_qtcb_header *header = &req->qtcb->header;
955
956 ct->status = -EINVAL;
957
958 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
959 goto skip_fsfstatus;
960
961 switch (header->fsf_status) {
962 case FSF_GOOD:
963 zfcp_dbf_san_ct_response(req);
964 ct->status = 0;
965 break;
966 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
967 zfcp_fsf_class_not_supp(req);
968 break;
969 case FSF_ADAPTER_STATUS_AVAILABLE:
970 switch (header->fsf_status_qual.word[0]){
971 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
972 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
973 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
974 break;
975 }
976 break;
977 case FSF_ACCESS_DENIED:
978 break;
979 case FSF_PORT_BOXED:
980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
981 break;
982 case FSF_PORT_HANDLE_NOT_VALID:
983 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
984 /* fall through */
985 case FSF_GENERIC_COMMAND_REJECTED:
986 case FSF_PAYLOAD_SIZE_MISMATCH:
987 case FSF_REQUEST_SIZE_TOO_LARGE:
988 case FSF_RESPONSE_SIZE_TOO_LARGE:
989 case FSF_SBAL_MISMATCH:
990 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
991 break;
992 }
993
994 skip_fsfstatus:
995 if (ct->handler)
996 ct->handler(ct->handler_data);
997 }
998
999 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1000 struct scatterlist *sg_req,
1001 struct scatterlist *sg_resp)
1002 {
1003 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1004 sbale[2].addr = sg_virt(sg_req);
1005 sbale[2].length = sg_req->length;
1006 sbale[3].addr = sg_virt(sg_resp);
1007 sbale[3].length = sg_resp->length;
1008 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1009 }
1010
1011 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1012 {
1013 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1014 }
1015
1016 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1017 struct scatterlist *sg_req,
1018 struct scatterlist *sg_resp,
1019 int max_sbals)
1020 {
1021 struct zfcp_adapter *adapter = req->adapter;
1022 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1023 &req->qdio_req);
1024 u32 feat = adapter->adapter_features;
1025 int bytes;
1026
1027 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1028 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1029 return -EOPNOTSUPP;
1030
1031 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1032 return 0;
1033 }
1034
1035 /* use single, unchained SBAL if it can hold the request */
1036 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1037 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1038 return 0;
1039 }
1040
1041 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
1042 SBAL_FLAGS0_TYPE_WRITE_READ,
1043 sg_req, max_sbals);
1044 if (bytes <= 0)
1045 return -EIO;
1046 req->qtcb->bottom.support.req_buf_length = bytes;
1047 req->qdio_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1048
1049 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
1050 SBAL_FLAGS0_TYPE_WRITE_READ,
1051 sg_resp, max_sbals);
1052 req->qtcb->bottom.support.resp_buf_length = bytes;
1053 if (bytes <= 0)
1054 return -EIO;
1055
1056 return 0;
1057 }
1058
1059 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1060 struct scatterlist *sg_req,
1061 struct scatterlist *sg_resp,
1062 int max_sbals, unsigned int timeout)
1063 {
1064 int ret;
1065
1066 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1067 if (ret)
1068 return ret;
1069
1070 /* common settings for ct/gs and els requests */
1071 if (timeout > 255)
1072 timeout = 255; /* max value accepted by hardware */
1073 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1074 req->qtcb->bottom.support.timeout = timeout;
1075 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1076
1077 return 0;
1078 }
1079
1080 /**
1081 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1082 * @ct: pointer to struct zfcp_send_ct with data for request
1083 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1084 */
1085 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1086 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1087 unsigned int timeout)
1088 {
1089 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1090 struct zfcp_fsf_req *req;
1091 int ret = -EIO;
1092
1093 spin_lock_bh(&qdio->req_q_lock);
1094 if (zfcp_fsf_req_sbal_get(qdio))
1095 goto out;
1096
1097 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1098
1099 if (IS_ERR(req)) {
1100 ret = PTR_ERR(req);
1101 goto out;
1102 }
1103
1104 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1105 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1106 FSF_MAX_SBALS_PER_REQ, timeout);
1107 if (ret)
1108 goto failed_send;
1109
1110 req->handler = zfcp_fsf_send_ct_handler;
1111 req->qtcb->header.port_handle = wka_port->handle;
1112 req->data = ct;
1113
1114 zfcp_dbf_san_ct_request(req, wka_port->d_id);
1115
1116 ret = zfcp_fsf_req_send(req);
1117 if (ret)
1118 goto failed_send;
1119
1120 goto out;
1121
1122 failed_send:
1123 zfcp_fsf_req_free(req);
1124 out:
1125 spin_unlock_bh(&qdio->req_q_lock);
1126 return ret;
1127 }
1128
1129 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1130 {
1131 struct zfcp_fsf_ct_els *send_els = req->data;
1132 struct zfcp_port *port = send_els->port;
1133 struct fsf_qtcb_header *header = &req->qtcb->header;
1134
1135 send_els->status = -EINVAL;
1136
1137 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1138 goto skip_fsfstatus;
1139
1140 switch (header->fsf_status) {
1141 case FSF_GOOD:
1142 zfcp_dbf_san_els_response(req);
1143 send_els->status = 0;
1144 break;
1145 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1146 zfcp_fsf_class_not_supp(req);
1147 break;
1148 case FSF_ADAPTER_STATUS_AVAILABLE:
1149 switch (header->fsf_status_qual.word[0]){
1150 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1151 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1152 case FSF_SQ_RETRY_IF_POSSIBLE:
1153 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1154 break;
1155 }
1156 break;
1157 case FSF_ELS_COMMAND_REJECTED:
1158 case FSF_PAYLOAD_SIZE_MISMATCH:
1159 case FSF_REQUEST_SIZE_TOO_LARGE:
1160 case FSF_RESPONSE_SIZE_TOO_LARGE:
1161 break;
1162 case FSF_ACCESS_DENIED:
1163 if (port)
1164 zfcp_fsf_access_denied_port(req, port);
1165 break;
1166 case FSF_SBAL_MISMATCH:
1167 /* should never occure, avoided in zfcp_fsf_send_els */
1168 /* fall through */
1169 default:
1170 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1171 break;
1172 }
1173 skip_fsfstatus:
1174 if (send_els->handler)
1175 send_els->handler(send_els->handler_data);
1176 }
1177
1178 /**
1179 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1180 * @els: pointer to struct zfcp_send_els with data for the command
1181 */
1182 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1183 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1184 {
1185 struct zfcp_fsf_req *req;
1186 struct zfcp_qdio *qdio = adapter->qdio;
1187 int ret = -EIO;
1188
1189 spin_lock_bh(&qdio->req_q_lock);
1190 if (zfcp_fsf_req_sbal_get(qdio))
1191 goto out;
1192
1193 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1194
1195 if (IS_ERR(req)) {
1196 ret = PTR_ERR(req);
1197 goto out;
1198 }
1199
1200 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1201 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout);
1202
1203 if (ret)
1204 goto failed_send;
1205
1206 hton24(req->qtcb->bottom.support.d_id, d_id);
1207 req->handler = zfcp_fsf_send_els_handler;
1208 req->data = els;
1209
1210 zfcp_dbf_san_els_request(req);
1211
1212 ret = zfcp_fsf_req_send(req);
1213 if (ret)
1214 goto failed_send;
1215
1216 goto out;
1217
1218 failed_send:
1219 zfcp_fsf_req_free(req);
1220 out:
1221 spin_unlock_bh(&qdio->req_q_lock);
1222 return ret;
1223 }
1224
1225 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1226 {
1227 struct qdio_buffer_element *sbale;
1228 struct zfcp_fsf_req *req;
1229 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1230 int retval = -EIO;
1231
1232 spin_lock_bh(&qdio->req_q_lock);
1233 if (zfcp_fsf_req_sbal_get(qdio))
1234 goto out;
1235
1236 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1237 qdio->adapter->pool.erp_req);
1238
1239 if (IS_ERR(req)) {
1240 retval = PTR_ERR(req);
1241 goto out;
1242 }
1243
1244 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1245 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1246 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1247 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1248
1249 req->qtcb->bottom.config.feature_selection =
1250 FSF_FEATURE_CFDC |
1251 FSF_FEATURE_LUN_SHARING |
1252 FSF_FEATURE_NOTIFICATION_LOST |
1253 FSF_FEATURE_UPDATE_ALERT;
1254 req->erp_action = erp_action;
1255 req->handler = zfcp_fsf_exchange_config_data_handler;
1256 erp_action->fsf_req_id = req->req_id;
1257
1258 zfcp_fsf_start_erp_timer(req);
1259 retval = zfcp_fsf_req_send(req);
1260 if (retval) {
1261 zfcp_fsf_req_free(req);
1262 erp_action->fsf_req_id = 0;
1263 }
1264 out:
1265 spin_unlock_bh(&qdio->req_q_lock);
1266 return retval;
1267 }
1268
1269 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1270 struct fsf_qtcb_bottom_config *data)
1271 {
1272 struct qdio_buffer_element *sbale;
1273 struct zfcp_fsf_req *req = NULL;
1274 int retval = -EIO;
1275
1276 spin_lock_bh(&qdio->req_q_lock);
1277 if (zfcp_fsf_req_sbal_get(qdio))
1278 goto out_unlock;
1279
1280 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1281
1282 if (IS_ERR(req)) {
1283 retval = PTR_ERR(req);
1284 goto out_unlock;
1285 }
1286
1287 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1288 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1289 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1290 req->handler = zfcp_fsf_exchange_config_data_handler;
1291
1292 req->qtcb->bottom.config.feature_selection =
1293 FSF_FEATURE_CFDC |
1294 FSF_FEATURE_LUN_SHARING |
1295 FSF_FEATURE_NOTIFICATION_LOST |
1296 FSF_FEATURE_UPDATE_ALERT;
1297
1298 if (data)
1299 req->data = data;
1300
1301 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1302 retval = zfcp_fsf_req_send(req);
1303 spin_unlock_bh(&qdio->req_q_lock);
1304 if (!retval)
1305 wait_for_completion(&req->completion);
1306
1307 zfcp_fsf_req_free(req);
1308 return retval;
1309
1310 out_unlock:
1311 spin_unlock_bh(&qdio->req_q_lock);
1312 return retval;
1313 }
1314
1315 /**
1316 * zfcp_fsf_exchange_port_data - request information about local port
1317 * @erp_action: ERP action for the adapter for which port data is requested
1318 * Returns: 0 on success, error otherwise
1319 */
1320 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1321 {
1322 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1323 struct qdio_buffer_element *sbale;
1324 struct zfcp_fsf_req *req;
1325 int retval = -EIO;
1326
1327 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1328 return -EOPNOTSUPP;
1329
1330 spin_lock_bh(&qdio->req_q_lock);
1331 if (zfcp_fsf_req_sbal_get(qdio))
1332 goto out;
1333
1334 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1335 qdio->adapter->pool.erp_req);
1336
1337 if (IS_ERR(req)) {
1338 retval = PTR_ERR(req);
1339 goto out;
1340 }
1341
1342 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1343 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1344 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1345 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1346
1347 req->handler = zfcp_fsf_exchange_port_data_handler;
1348 req->erp_action = erp_action;
1349 erp_action->fsf_req_id = req->req_id;
1350
1351 zfcp_fsf_start_erp_timer(req);
1352 retval = zfcp_fsf_req_send(req);
1353 if (retval) {
1354 zfcp_fsf_req_free(req);
1355 erp_action->fsf_req_id = 0;
1356 }
1357 out:
1358 spin_unlock_bh(&qdio->req_q_lock);
1359 return retval;
1360 }
1361
1362 /**
1363 * zfcp_fsf_exchange_port_data_sync - request information about local port
1364 * @qdio: pointer to struct zfcp_qdio
1365 * @data: pointer to struct fsf_qtcb_bottom_port
1366 * Returns: 0 on success, error otherwise
1367 */
1368 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1369 struct fsf_qtcb_bottom_port *data)
1370 {
1371 struct qdio_buffer_element *sbale;
1372 struct zfcp_fsf_req *req = NULL;
1373 int retval = -EIO;
1374
1375 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1376 return -EOPNOTSUPP;
1377
1378 spin_lock_bh(&qdio->req_q_lock);
1379 if (zfcp_fsf_req_sbal_get(qdio))
1380 goto out_unlock;
1381
1382 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1383
1384 if (IS_ERR(req)) {
1385 retval = PTR_ERR(req);
1386 goto out_unlock;
1387 }
1388
1389 if (data)
1390 req->data = data;
1391
1392 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1393 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1394 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1395
1396 req->handler = zfcp_fsf_exchange_port_data_handler;
1397 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1398 retval = zfcp_fsf_req_send(req);
1399 spin_unlock_bh(&qdio->req_q_lock);
1400
1401 if (!retval)
1402 wait_for_completion(&req->completion);
1403
1404 zfcp_fsf_req_free(req);
1405
1406 return retval;
1407
1408 out_unlock:
1409 spin_unlock_bh(&qdio->req_q_lock);
1410 return retval;
1411 }
1412
1413 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1414 {
1415 struct zfcp_port *port = req->data;
1416 struct fsf_qtcb_header *header = &req->qtcb->header;
1417 struct fc_els_flogi *plogi;
1418
1419 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1420 goto out;
1421
1422 switch (header->fsf_status) {
1423 case FSF_PORT_ALREADY_OPEN:
1424 break;
1425 case FSF_ACCESS_DENIED:
1426 zfcp_fsf_access_denied_port(req, port);
1427 break;
1428 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1429 dev_warn(&req->adapter->ccw_device->dev,
1430 "Not enough FCP adapter resources to open "
1431 "remote port 0x%016Lx\n",
1432 (unsigned long long)port->wwpn);
1433 zfcp_erp_port_failed(port, "fsoph_1", req);
1434 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1435 break;
1436 case FSF_ADAPTER_STATUS_AVAILABLE:
1437 switch (header->fsf_status_qual.word[0]) {
1438 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1439 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1440 case FSF_SQ_NO_RETRY_POSSIBLE:
1441 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1442 break;
1443 }
1444 break;
1445 case FSF_GOOD:
1446 port->handle = header->port_handle;
1447 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1448 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1449 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1450 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1451 &port->status);
1452 /* check whether D_ID has changed during open */
1453 /*
1454 * FIXME: This check is not airtight, as the FCP channel does
1455 * not monitor closures of target port connections caused on
1456 * the remote side. Thus, they might miss out on invalidating
1457 * locally cached WWPNs (and other N_Port parameters) of gone
1458 * target ports. So, our heroic attempt to make things safe
1459 * could be undermined by 'open port' response data tagged with
1460 * obsolete WWPNs. Another reason to monitor potential
1461 * connection closures ourself at least (by interpreting
1462 * incoming ELS' and unsolicited status). It just crosses my
1463 * mind that one should be able to cross-check by means of
1464 * another GID_PN straight after a port has been opened.
1465 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1466 */
1467 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1468 if (req->qtcb->bottom.support.els1_length >=
1469 FSF_PLOGI_MIN_LEN)
1470 zfcp_fc_plogi_evaluate(port, plogi);
1471 break;
1472 case FSF_UNKNOWN_OP_SUBTYPE:
1473 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1474 break;
1475 }
1476
1477 out:
1478 put_device(&port->dev);
1479 }
1480
1481 /**
1482 * zfcp_fsf_open_port - create and send open port request
1483 * @erp_action: pointer to struct zfcp_erp_action
1484 * Returns: 0 on success, error otherwise
1485 */
1486 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1487 {
1488 struct qdio_buffer_element *sbale;
1489 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1490 struct zfcp_port *port = erp_action->port;
1491 struct zfcp_fsf_req *req;
1492 int retval = -EIO;
1493
1494 spin_lock_bh(&qdio->req_q_lock);
1495 if (zfcp_fsf_req_sbal_get(qdio))
1496 goto out;
1497
1498 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1499 qdio->adapter->pool.erp_req);
1500
1501 if (IS_ERR(req)) {
1502 retval = PTR_ERR(req);
1503 goto out;
1504 }
1505
1506 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1507 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1508 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1509 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1510
1511 req->handler = zfcp_fsf_open_port_handler;
1512 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1513 req->data = port;
1514 req->erp_action = erp_action;
1515 erp_action->fsf_req_id = req->req_id;
1516 get_device(&port->dev);
1517
1518 zfcp_fsf_start_erp_timer(req);
1519 retval = zfcp_fsf_req_send(req);
1520 if (retval) {
1521 zfcp_fsf_req_free(req);
1522 erp_action->fsf_req_id = 0;
1523 put_device(&port->dev);
1524 }
1525 out:
1526 spin_unlock_bh(&qdio->req_q_lock);
1527 return retval;
1528 }
1529
1530 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1531 {
1532 struct zfcp_port *port = req->data;
1533
1534 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1535 return;
1536
1537 switch (req->qtcb->header.fsf_status) {
1538 case FSF_PORT_HANDLE_NOT_VALID:
1539 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1540 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1541 break;
1542 case FSF_ADAPTER_STATUS_AVAILABLE:
1543 break;
1544 case FSF_GOOD:
1545 zfcp_erp_modify_port_status(port, "fscph_2", req,
1546 ZFCP_STATUS_COMMON_OPEN,
1547 ZFCP_CLEAR);
1548 break;
1549 }
1550 }
1551
1552 /**
1553 * zfcp_fsf_close_port - create and send close port request
1554 * @erp_action: pointer to struct zfcp_erp_action
1555 * Returns: 0 on success, error otherwise
1556 */
1557 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1558 {
1559 struct qdio_buffer_element *sbale;
1560 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1561 struct zfcp_fsf_req *req;
1562 int retval = -EIO;
1563
1564 spin_lock_bh(&qdio->req_q_lock);
1565 if (zfcp_fsf_req_sbal_get(qdio))
1566 goto out;
1567
1568 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1569 qdio->adapter->pool.erp_req);
1570
1571 if (IS_ERR(req)) {
1572 retval = PTR_ERR(req);
1573 goto out;
1574 }
1575
1576 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1577 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1578 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1579 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1580
1581 req->handler = zfcp_fsf_close_port_handler;
1582 req->data = erp_action->port;
1583 req->erp_action = erp_action;
1584 req->qtcb->header.port_handle = erp_action->port->handle;
1585 erp_action->fsf_req_id = req->req_id;
1586
1587 zfcp_fsf_start_erp_timer(req);
1588 retval = zfcp_fsf_req_send(req);
1589 if (retval) {
1590 zfcp_fsf_req_free(req);
1591 erp_action->fsf_req_id = 0;
1592 }
1593 out:
1594 spin_unlock_bh(&qdio->req_q_lock);
1595 return retval;
1596 }
1597
1598 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1599 {
1600 struct zfcp_fc_wka_port *wka_port = req->data;
1601 struct fsf_qtcb_header *header = &req->qtcb->header;
1602
1603 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1604 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1605 goto out;
1606 }
1607
1608 switch (header->fsf_status) {
1609 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1610 dev_warn(&req->adapter->ccw_device->dev,
1611 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1612 /* fall through */
1613 case FSF_ADAPTER_STATUS_AVAILABLE:
1614 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1615 /* fall through */
1616 case FSF_ACCESS_DENIED:
1617 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1618 break;
1619 case FSF_GOOD:
1620 wka_port->handle = header->port_handle;
1621 /* fall through */
1622 case FSF_PORT_ALREADY_OPEN:
1623 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1624 }
1625 out:
1626 wake_up(&wka_port->completion_wq);
1627 }
1628
1629 /**
1630 * zfcp_fsf_open_wka_port - create and send open wka-port request
1631 * @wka_port: pointer to struct zfcp_fc_wka_port
1632 * Returns: 0 on success, error otherwise
1633 */
1634 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1635 {
1636 struct qdio_buffer_element *sbale;
1637 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1638 struct zfcp_fsf_req *req;
1639 int retval = -EIO;
1640
1641 spin_lock_bh(&qdio->req_q_lock);
1642 if (zfcp_fsf_req_sbal_get(qdio))
1643 goto out;
1644
1645 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1646 qdio->adapter->pool.erp_req);
1647
1648 if (unlikely(IS_ERR(req))) {
1649 retval = PTR_ERR(req);
1650 goto out;
1651 }
1652
1653 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1654 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1655 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1656 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1657
1658 req->handler = zfcp_fsf_open_wka_port_handler;
1659 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1660 req->data = wka_port;
1661
1662 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1663 retval = zfcp_fsf_req_send(req);
1664 if (retval)
1665 zfcp_fsf_req_free(req);
1666 out:
1667 spin_unlock_bh(&qdio->req_q_lock);
1668 return retval;
1669 }
1670
1671 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1672 {
1673 struct zfcp_fc_wka_port *wka_port = req->data;
1674
1675 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1676 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1677 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1678 }
1679
1680 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1681 wake_up(&wka_port->completion_wq);
1682 }
1683
1684 /**
1685 * zfcp_fsf_close_wka_port - create and send close wka port request
1686 * @wka_port: WKA port to open
1687 * Returns: 0 on success, error otherwise
1688 */
1689 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1690 {
1691 struct qdio_buffer_element *sbale;
1692 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1693 struct zfcp_fsf_req *req;
1694 int retval = -EIO;
1695
1696 spin_lock_bh(&qdio->req_q_lock);
1697 if (zfcp_fsf_req_sbal_get(qdio))
1698 goto out;
1699
1700 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1701 qdio->adapter->pool.erp_req);
1702
1703 if (unlikely(IS_ERR(req))) {
1704 retval = PTR_ERR(req);
1705 goto out;
1706 }
1707
1708 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1709 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1710 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1711 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1712
1713 req->handler = zfcp_fsf_close_wka_port_handler;
1714 req->data = wka_port;
1715 req->qtcb->header.port_handle = wka_port->handle;
1716
1717 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1718 retval = zfcp_fsf_req_send(req);
1719 if (retval)
1720 zfcp_fsf_req_free(req);
1721 out:
1722 spin_unlock_bh(&qdio->req_q_lock);
1723 return retval;
1724 }
1725
1726 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1727 {
1728 struct zfcp_port *port = req->data;
1729 struct fsf_qtcb_header *header = &req->qtcb->header;
1730 struct zfcp_unit *unit;
1731
1732 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1733 return;
1734
1735 switch (header->fsf_status) {
1736 case FSF_PORT_HANDLE_NOT_VALID:
1737 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1738 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1739 break;
1740 case FSF_ACCESS_DENIED:
1741 zfcp_fsf_access_denied_port(req, port);
1742 break;
1743 case FSF_PORT_BOXED:
1744 /* can't use generic zfcp_erp_modify_port_status because
1745 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1746 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1747 read_lock(&port->unit_list_lock);
1748 list_for_each_entry(unit, &port->unit_list, list)
1749 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1750 &unit->status);
1751 read_unlock(&port->unit_list_lock);
1752 zfcp_erp_port_boxed(port, "fscpph2", req);
1753 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1754 break;
1755 case FSF_ADAPTER_STATUS_AVAILABLE:
1756 switch (header->fsf_status_qual.word[0]) {
1757 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1758 /* fall through */
1759 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1760 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1761 break;
1762 }
1763 break;
1764 case FSF_GOOD:
1765 /* can't use generic zfcp_erp_modify_port_status because
1766 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1767 */
1768 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1769 read_lock(&port->unit_list_lock);
1770 list_for_each_entry(unit, &port->unit_list, list)
1771 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1772 &unit->status);
1773 read_unlock(&port->unit_list_lock);
1774 break;
1775 }
1776 }
1777
1778 /**
1779 * zfcp_fsf_close_physical_port - close physical port
1780 * @erp_action: pointer to struct zfcp_erp_action
1781 * Returns: 0 on success
1782 */
1783 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1784 {
1785 struct qdio_buffer_element *sbale;
1786 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1787 struct zfcp_fsf_req *req;
1788 int retval = -EIO;
1789
1790 spin_lock_bh(&qdio->req_q_lock);
1791 if (zfcp_fsf_req_sbal_get(qdio))
1792 goto out;
1793
1794 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1795 qdio->adapter->pool.erp_req);
1796
1797 if (IS_ERR(req)) {
1798 retval = PTR_ERR(req);
1799 goto out;
1800 }
1801
1802 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1803 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1804 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1805 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1806
1807 req->data = erp_action->port;
1808 req->qtcb->header.port_handle = erp_action->port->handle;
1809 req->erp_action = erp_action;
1810 req->handler = zfcp_fsf_close_physical_port_handler;
1811 erp_action->fsf_req_id = req->req_id;
1812
1813 zfcp_fsf_start_erp_timer(req);
1814 retval = zfcp_fsf_req_send(req);
1815 if (retval) {
1816 zfcp_fsf_req_free(req);
1817 erp_action->fsf_req_id = 0;
1818 }
1819 out:
1820 spin_unlock_bh(&qdio->req_q_lock);
1821 return retval;
1822 }
1823
1824 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1825 {
1826 struct zfcp_adapter *adapter = req->adapter;
1827 struct zfcp_unit *unit = req->data;
1828 struct fsf_qtcb_header *header = &req->qtcb->header;
1829 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1830 struct fsf_queue_designator *queue_designator =
1831 &header->fsf_status_qual.fsf_queue_designator;
1832 int exclusive, readwrite;
1833
1834 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1835 return;
1836
1837 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1838 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1839 ZFCP_STATUS_UNIT_SHARED |
1840 ZFCP_STATUS_UNIT_READONLY,
1841 &unit->status);
1842
1843 switch (header->fsf_status) {
1844
1845 case FSF_PORT_HANDLE_NOT_VALID:
1846 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1847 /* fall through */
1848 case FSF_LUN_ALREADY_OPEN:
1849 break;
1850 case FSF_ACCESS_DENIED:
1851 zfcp_fsf_access_denied_unit(req, unit);
1852 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1853 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1854 break;
1855 case FSF_PORT_BOXED:
1856 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1858 break;
1859 case FSF_LUN_SHARING_VIOLATION:
1860 if (header->fsf_status_qual.word[0])
1861 dev_warn(&adapter->ccw_device->dev,
1862 "LUN 0x%Lx on port 0x%Lx is already in "
1863 "use by CSS%d, MIF Image ID %x\n",
1864 (unsigned long long)unit->fcp_lun,
1865 (unsigned long long)unit->port->wwpn,
1866 queue_designator->cssid,
1867 queue_designator->hla);
1868 else
1869 zfcp_act_eval_err(adapter,
1870 header->fsf_status_qual.word[2]);
1871 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1872 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1873 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1874 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1875 break;
1876 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1877 dev_warn(&adapter->ccw_device->dev,
1878 "No handle is available for LUN "
1879 "0x%016Lx on port 0x%016Lx\n",
1880 (unsigned long long)unit->fcp_lun,
1881 (unsigned long long)unit->port->wwpn);
1882 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1883 /* fall through */
1884 case FSF_INVALID_COMMAND_OPTION:
1885 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1886 break;
1887 case FSF_ADAPTER_STATUS_AVAILABLE:
1888 switch (header->fsf_status_qual.word[0]) {
1889 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1890 zfcp_fc_test_link(unit->port);
1891 /* fall through */
1892 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1893 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894 break;
1895 }
1896 break;
1897
1898 case FSF_GOOD:
1899 unit->handle = header->lun_handle;
1900 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1901
1902 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1903 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1904 !zfcp_ccw_priv_sch(adapter)) {
1905 exclusive = (bottom->lun_access_info &
1906 FSF_UNIT_ACCESS_EXCLUSIVE);
1907 readwrite = (bottom->lun_access_info &
1908 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1909
1910 if (!exclusive)
1911 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1912 &unit->status);
1913
1914 if (!readwrite) {
1915 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1916 &unit->status);
1917 dev_info(&adapter->ccw_device->dev,
1918 "SCSI device at LUN 0x%016Lx on port "
1919 "0x%016Lx opened read-only\n",
1920 (unsigned long long)unit->fcp_lun,
1921 (unsigned long long)unit->port->wwpn);
1922 }
1923
1924 if (exclusive && !readwrite) {
1925 dev_err(&adapter->ccw_device->dev,
1926 "Exclusive read-only access not "
1927 "supported (unit 0x%016Lx, "
1928 "port 0x%016Lx)\n",
1929 (unsigned long long)unit->fcp_lun,
1930 (unsigned long long)unit->port->wwpn);
1931 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1932 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1933 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1934 } else if (!exclusive && readwrite) {
1935 dev_err(&adapter->ccw_device->dev,
1936 "Shared read-write access not "
1937 "supported (unit 0x%016Lx, port "
1938 "0x%016Lx)\n",
1939 (unsigned long long)unit->fcp_lun,
1940 (unsigned long long)unit->port->wwpn);
1941 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1942 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1943 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1944 }
1945 }
1946 break;
1947 }
1948 }
1949
1950 /**
1951 * zfcp_fsf_open_unit - open unit
1952 * @erp_action: pointer to struct zfcp_erp_action
1953 * Returns: 0 on success, error otherwise
1954 */
1955 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1956 {
1957 struct qdio_buffer_element *sbale;
1958 struct zfcp_adapter *adapter = erp_action->adapter;
1959 struct zfcp_qdio *qdio = adapter->qdio;
1960 struct zfcp_fsf_req *req;
1961 int retval = -EIO;
1962
1963 spin_lock_bh(&qdio->req_q_lock);
1964 if (zfcp_fsf_req_sbal_get(qdio))
1965 goto out;
1966
1967 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1968 adapter->pool.erp_req);
1969
1970 if (IS_ERR(req)) {
1971 retval = PTR_ERR(req);
1972 goto out;
1973 }
1974
1975 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1976 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
1977 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1978 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1979
1980 req->qtcb->header.port_handle = erp_action->port->handle;
1981 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1982 req->handler = zfcp_fsf_open_unit_handler;
1983 req->data = erp_action->unit;
1984 req->erp_action = erp_action;
1985 erp_action->fsf_req_id = req->req_id;
1986
1987 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1988 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1989
1990 zfcp_fsf_start_erp_timer(req);
1991 retval = zfcp_fsf_req_send(req);
1992 if (retval) {
1993 zfcp_fsf_req_free(req);
1994 erp_action->fsf_req_id = 0;
1995 }
1996 out:
1997 spin_unlock_bh(&qdio->req_q_lock);
1998 return retval;
1999 }
2000
2001 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2002 {
2003 struct zfcp_unit *unit = req->data;
2004
2005 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2006 return;
2007
2008 switch (req->qtcb->header.fsf_status) {
2009 case FSF_PORT_HANDLE_NOT_VALID:
2010 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2011 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2012 break;
2013 case FSF_LUN_HANDLE_NOT_VALID:
2014 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2015 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2016 break;
2017 case FSF_PORT_BOXED:
2018 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2019 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2020 break;
2021 case FSF_ADAPTER_STATUS_AVAILABLE:
2022 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2023 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2024 zfcp_fc_test_link(unit->port);
2025 /* fall through */
2026 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2027 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2028 break;
2029 }
2030 break;
2031 case FSF_GOOD:
2032 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2033 break;
2034 }
2035 }
2036
2037 /**
2038 * zfcp_fsf_close_unit - close zfcp unit
2039 * @erp_action: pointer to struct zfcp_unit
2040 * Returns: 0 on success, error otherwise
2041 */
2042 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2043 {
2044 struct qdio_buffer_element *sbale;
2045 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2046 struct zfcp_fsf_req *req;
2047 int retval = -EIO;
2048
2049 spin_lock_bh(&qdio->req_q_lock);
2050 if (zfcp_fsf_req_sbal_get(qdio))
2051 goto out;
2052
2053 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2054 qdio->adapter->pool.erp_req);
2055
2056 if (IS_ERR(req)) {
2057 retval = PTR_ERR(req);
2058 goto out;
2059 }
2060
2061 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2062 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
2063 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2064 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2065
2066 req->qtcb->header.port_handle = erp_action->port->handle;
2067 req->qtcb->header.lun_handle = erp_action->unit->handle;
2068 req->handler = zfcp_fsf_close_unit_handler;
2069 req->data = erp_action->unit;
2070 req->erp_action = erp_action;
2071 erp_action->fsf_req_id = req->req_id;
2072
2073 zfcp_fsf_start_erp_timer(req);
2074 retval = zfcp_fsf_req_send(req);
2075 if (retval) {
2076 zfcp_fsf_req_free(req);
2077 erp_action->fsf_req_id = 0;
2078 }
2079 out:
2080 spin_unlock_bh(&qdio->req_q_lock);
2081 return retval;
2082 }
2083
2084 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2085 {
2086 lat_rec->sum += lat;
2087 lat_rec->min = min(lat_rec->min, lat);
2088 lat_rec->max = max(lat_rec->max, lat);
2089 }
2090
2091 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2092 {
2093 struct fsf_qual_latency_info *lat_in;
2094 struct latency_cont *lat = NULL;
2095 struct zfcp_unit *unit = req->unit;
2096 struct zfcp_blk_drv_data blktrc;
2097 int ticks = req->adapter->timer_ticks;
2098
2099 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2100
2101 blktrc.flags = 0;
2102 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2103 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2104 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2105 blktrc.inb_usage = req->qdio_req.qdio_inb_usage;
2106 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2107
2108 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2109 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2110 blktrc.channel_lat = lat_in->channel_lat * ticks;
2111 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2112
2113 switch (req->qtcb->bottom.io.data_direction) {
2114 case FSF_DATADIR_READ:
2115 lat = &unit->latencies.read;
2116 break;
2117 case FSF_DATADIR_WRITE:
2118 lat = &unit->latencies.write;
2119 break;
2120 case FSF_DATADIR_CMND:
2121 lat = &unit->latencies.cmd;
2122 break;
2123 }
2124
2125 if (lat) {
2126 spin_lock(&unit->latencies.lock);
2127 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2128 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2129 lat->counter++;
2130 spin_unlock(&unit->latencies.lock);
2131 }
2132 }
2133
2134 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2135 sizeof(blktrc));
2136 }
2137
2138 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2139 {
2140 struct scsi_cmnd *scpnt;
2141 struct fcp_resp_with_ext *fcp_rsp;
2142 unsigned long flags;
2143
2144 read_lock_irqsave(&req->adapter->abort_lock, flags);
2145
2146 scpnt = req->data;
2147 if (unlikely(!scpnt)) {
2148 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2149 return;
2150 }
2151
2152 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2153 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2154 goto skip_fsfstatus;
2155 }
2156
2157 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2158 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2159
2160 zfcp_fsf_req_trace(req, scpnt);
2161
2162 skip_fsfstatus:
2163 zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
2164
2165 scpnt->host_scribble = NULL;
2166 (scpnt->scsi_done) (scpnt);
2167 /*
2168 * We must hold this lock until scsi_done has been called.
2169 * Otherwise we may call scsi_done after abort regarding this
2170 * command has completed.
2171 * Note: scsi_done must not block!
2172 */
2173 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2174 }
2175
2176 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2177 {
2178 struct fcp_resp_with_ext *fcp_rsp;
2179 struct fcp_resp_rsp_info *rsp_info;
2180
2181 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2182 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2183
2184 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2185 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2186 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2187 }
2188
2189
2190 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2191 {
2192 struct zfcp_unit *unit;
2193 struct fsf_qtcb_header *header = &req->qtcb->header;
2194
2195 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2196 unit = req->data;
2197 else
2198 unit = req->unit;
2199
2200 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2201 goto skip_fsfstatus;
2202
2203 switch (header->fsf_status) {
2204 case FSF_HANDLE_MISMATCH:
2205 case FSF_PORT_HANDLE_NOT_VALID:
2206 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2207 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2208 break;
2209 case FSF_FCPLUN_NOT_VALID:
2210 case FSF_LUN_HANDLE_NOT_VALID:
2211 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2212 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2213 break;
2214 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2215 zfcp_fsf_class_not_supp(req);
2216 break;
2217 case FSF_ACCESS_DENIED:
2218 zfcp_fsf_access_denied_unit(req, unit);
2219 break;
2220 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2221 dev_err(&req->adapter->ccw_device->dev,
2222 "Incorrect direction %d, unit 0x%016Lx on port "
2223 "0x%016Lx closed\n",
2224 req->qtcb->bottom.io.data_direction,
2225 (unsigned long long)unit->fcp_lun,
2226 (unsigned long long)unit->port->wwpn);
2227 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2228 req);
2229 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2230 break;
2231 case FSF_CMND_LENGTH_NOT_VALID:
2232 dev_err(&req->adapter->ccw_device->dev,
2233 "Incorrect CDB length %d, unit 0x%016Lx on "
2234 "port 0x%016Lx closed\n",
2235 req->qtcb->bottom.io.fcp_cmnd_length,
2236 (unsigned long long)unit->fcp_lun,
2237 (unsigned long long)unit->port->wwpn);
2238 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2239 req);
2240 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2241 break;
2242 case FSF_PORT_BOXED:
2243 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2244 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2245 break;
2246 case FSF_LUN_BOXED:
2247 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2248 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2249 break;
2250 case FSF_ADAPTER_STATUS_AVAILABLE:
2251 if (header->fsf_status_qual.word[0] ==
2252 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2253 zfcp_fc_test_link(unit->port);
2254 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255 break;
2256 }
2257 skip_fsfstatus:
2258 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2259 zfcp_fsf_send_fcp_ctm_handler(req);
2260 else {
2261 zfcp_fsf_send_fcp_command_task_handler(req);
2262 req->unit = NULL;
2263 put_device(&unit->dev);
2264 }
2265 }
2266
2267 /**
2268 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2269 * @unit: unit where command is sent to
2270 * @scsi_cmnd: scsi command to be sent
2271 */
2272 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2273 struct scsi_cmnd *scsi_cmnd)
2274 {
2275 struct zfcp_fsf_req *req;
2276 struct fcp_cmnd *fcp_cmnd;
2277 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2278 int real_bytes, retval = -EIO;
2279 struct zfcp_adapter *adapter = unit->port->adapter;
2280 struct zfcp_qdio *qdio = adapter->qdio;
2281
2282 if (unlikely(!(atomic_read(&unit->status) &
2283 ZFCP_STATUS_COMMON_UNBLOCKED)))
2284 return -EBUSY;
2285
2286 spin_lock(&qdio->req_q_lock);
2287 if (atomic_read(&qdio->req_q.count) <= 0) {
2288 atomic_inc(&qdio->req_q_full);
2289 goto out;
2290 }
2291
2292 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2293 adapter->pool.scsi_req);
2294
2295 if (IS_ERR(req)) {
2296 retval = PTR_ERR(req);
2297 goto out;
2298 }
2299
2300 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2301 get_device(&unit->dev);
2302 req->unit = unit;
2303 req->data = scsi_cmnd;
2304 req->handler = zfcp_fsf_send_fcp_command_handler;
2305 req->qtcb->header.lun_handle = unit->handle;
2306 req->qtcb->header.port_handle = unit->port->handle;
2307 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2308 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2309
2310 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2311
2312 /*
2313 * set depending on data direction:
2314 * data direction bits in SBALE (SB Type)
2315 * data direction bits in QTCB
2316 */
2317 switch (scsi_cmnd->sc_data_direction) {
2318 case DMA_NONE:
2319 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2320 break;
2321 case DMA_FROM_DEVICE:
2322 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2323 break;
2324 case DMA_TO_DEVICE:
2325 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2326 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2327 break;
2328 case DMA_BIDIRECTIONAL:
2329 goto failed_scsi_cmnd;
2330 }
2331
2332 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2333 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2334
2335 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sbtype,
2336 scsi_sglist(scsi_cmnd),
2337 FSF_MAX_SBALS_PER_REQ);
2338 if (unlikely(real_bytes < 0)) {
2339 if (req->qdio_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2340 dev_err(&adapter->ccw_device->dev,
2341 "Oversize data package, unit 0x%016Lx "
2342 "on port 0x%016Lx closed\n",
2343 (unsigned long long)unit->fcp_lun,
2344 (unsigned long long)unit->port->wwpn);
2345 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2346 retval = -EINVAL;
2347 }
2348 goto failed_scsi_cmnd;
2349 }
2350
2351 retval = zfcp_fsf_req_send(req);
2352 if (unlikely(retval))
2353 goto failed_scsi_cmnd;
2354
2355 goto out;
2356
2357 failed_scsi_cmnd:
2358 put_device(&unit->dev);
2359 zfcp_fsf_req_free(req);
2360 scsi_cmnd->host_scribble = NULL;
2361 out:
2362 spin_unlock(&qdio->req_q_lock);
2363 return retval;
2364 }
2365
2366 /**
2367 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2368 * @unit: pointer to struct zfcp_unit
2369 * @tm_flags: unsigned byte for task management flags
2370 * Returns: on success pointer to struct fsf_req, NULL otherwise
2371 */
2372 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2373 {
2374 struct qdio_buffer_element *sbale;
2375 struct zfcp_fsf_req *req = NULL;
2376 struct fcp_cmnd *fcp_cmnd;
2377 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2378
2379 if (unlikely(!(atomic_read(&unit->status) &
2380 ZFCP_STATUS_COMMON_UNBLOCKED)))
2381 return NULL;
2382
2383 spin_lock_bh(&qdio->req_q_lock);
2384 if (zfcp_fsf_req_sbal_get(qdio))
2385 goto out;
2386
2387 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2388 qdio->adapter->pool.scsi_req);
2389
2390 if (IS_ERR(req)) {
2391 req = NULL;
2392 goto out;
2393 }
2394
2395 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2396 req->data = unit;
2397 req->handler = zfcp_fsf_send_fcp_command_handler;
2398 req->qtcb->header.lun_handle = unit->handle;
2399 req->qtcb->header.port_handle = unit->port->handle;
2400 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2401 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2402 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2403
2404 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
2405 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2406 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2407
2408 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2409 zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2410
2411 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2412 if (!zfcp_fsf_req_send(req))
2413 goto out;
2414
2415 zfcp_fsf_req_free(req);
2416 req = NULL;
2417 out:
2418 spin_unlock_bh(&qdio->req_q_lock);
2419 return req;
2420 }
2421
2422 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2423 {
2424 }
2425
2426 /**
2427 * zfcp_fsf_control_file - control file upload/download
2428 * @adapter: pointer to struct zfcp_adapter
2429 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2430 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2431 */
2432 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2433 struct zfcp_fsf_cfdc *fsf_cfdc)
2434 {
2435 struct qdio_buffer_element *sbale;
2436 struct zfcp_qdio *qdio = adapter->qdio;
2437 struct zfcp_fsf_req *req = NULL;
2438 struct fsf_qtcb_bottom_support *bottom;
2439 int direction, retval = -EIO, bytes;
2440
2441 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2442 return ERR_PTR(-EOPNOTSUPP);
2443
2444 switch (fsf_cfdc->command) {
2445 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2446 direction = SBAL_FLAGS0_TYPE_WRITE;
2447 break;
2448 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2449 direction = SBAL_FLAGS0_TYPE_READ;
2450 break;
2451 default:
2452 return ERR_PTR(-EINVAL);
2453 }
2454
2455 spin_lock_bh(&qdio->req_q_lock);
2456 if (zfcp_fsf_req_sbal_get(qdio))
2457 goto out;
2458
2459 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2460 if (IS_ERR(req)) {
2461 retval = -EPERM;
2462 goto out;
2463 }
2464
2465 req->handler = zfcp_fsf_control_file_handler;
2466
2467 sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);
2468 sbale[0].flags |= direction;
2469
2470 bottom = &req->qtcb->bottom.support;
2471 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2472 bottom->option = fsf_cfdc->option;
2473
2474 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2475 direction, fsf_cfdc->sg,
2476 FSF_MAX_SBALS_PER_REQ);
2477 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2478 zfcp_fsf_req_free(req);
2479 goto out;
2480 }
2481
2482 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2483 retval = zfcp_fsf_req_send(req);
2484 out:
2485 spin_unlock_bh(&qdio->req_q_lock);
2486
2487 if (!retval) {
2488 wait_for_completion(&req->completion);
2489 return req;
2490 }
2491 return ERR_PTR(retval);
2492 }
2493
2494 /**
2495 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2496 * @adapter: pointer to struct zfcp_adapter
2497 * @sbal_idx: response queue index of SBAL to be processed
2498 */
2499 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2500 {
2501 struct zfcp_adapter *adapter = qdio->adapter;
2502 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2503 struct qdio_buffer_element *sbale;
2504 struct zfcp_fsf_req *fsf_req;
2505 unsigned long req_id;
2506 int idx;
2507
2508 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2509
2510 sbale = &sbal->element[idx];
2511 req_id = (unsigned long) sbale->addr;
2512 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2513
2514 if (!fsf_req)
2515 /*
2516 * Unknown request means that we have potentially memory
2517 * corruption and must stop the machine immediately.
2518 */
2519 panic("error: unknown req_id (%lx) on adapter %s.\n",
2520 req_id, dev_name(&adapter->ccw_device->dev));
2521
2522 fsf_req->qdio_req.sbal_response = sbal_idx;
2523 fsf_req->qdio_req.qdio_inb_usage =
2524 atomic_read(&qdio->resp_q.count);
2525 zfcp_fsf_req_complete(fsf_req);
2526
2527 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2528 break;
2529 }
2530 }
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