?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
new, more flexible list_neighbor (breaks, if you do not update corutils, too)
[cor_2_6_31.git] / drivers / s390 / scsi / zfcp_fsf.c
blobc57658f3d34f60a9f8c49bb57ccb7c157b9ddb8b
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2009
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include "zfcp_ext.h"
14
15 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
16 #define ZFCP_REQ_NO_QTCB 0x00000008
17
18 static void zfcp_fsf_request_timeout_handler(unsigned long data)
19 {
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
22 "fsrth_1", NULL);
23 }
24
25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
27 {
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
32 }
33
34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
35 {
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
41 }
42
43 /* association between FSF command and FSF QTCB type */
44 static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
58 };
59
60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
61 {
62 u16 subtable = table >> 16;
63 u16 rule = table & 0xffff;
64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
65
66 if (subtable && subtable < ARRAY_SIZE(act_type))
67 dev_warn(&adapter->ccw_device->dev,
68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
70 }
71
72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
74 {
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
77 "Access denied to port 0x%016Lx\n",
78 (unsigned long long)port->wwpn);
79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
81 zfcp_erp_port_access_denied(port, "fspad_1", req);
82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
83 }
84
85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
87 {
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97 }
98
99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
100 {
101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
105 }
106
107 /**
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
110 */
111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
112 {
113 if (likely(req->pool)) {
114 mempool_free(req, req->pool);
115 return;
116 }
117
118 if (req->qtcb) {
119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
120 return;
121 }
122 }
123
124 /**
125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
126 * @adapter: pointer to struct zfcp_adapter
127 *
128 * Never ever call this without shutting down the adapter first.
129 * Otherwise the adapter would continue using and corrupting s390 storage.
130 * Included BUG_ON() call to ensure this is done.
131 * ERP is supposed to be the only user of this function.
132 */
133 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
134 {
135 struct zfcp_fsf_req *req, *tmp;
136 unsigned long flags;
137 LIST_HEAD(remove_queue);
138 unsigned int i;
139
140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
141 spin_lock_irqsave(&adapter->req_list_lock, flags);
142 for (i = 0; i < REQUEST_LIST_SIZE; i++)
143 list_splice_init(&adapter->req_list[i], &remove_queue);
144 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
145
146 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
147 list_del(&req->list);
148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
149 zfcp_fsf_req_complete(req);
150 }
151 }
152
153 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
154 {
155 struct fsf_status_read_buffer *sr_buf = req->data;
156 struct zfcp_adapter *adapter = req->adapter;
157 struct zfcp_port *port;
158 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
159 unsigned long flags;
160
161 read_lock_irqsave(&zfcp_data.config_lock, flags);
162 list_for_each_entry(port, &adapter->port_list_head, list)
163 if (port->d_id == d_id) {
164 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
165 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
169 }
170
171 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
172 struct fsf_link_down_info *link_down)
173 {
174 struct zfcp_adapter *adapter = req->adapter;
175 unsigned long flags;
176
177 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
178 return;
179
180 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
181
182 read_lock_irqsave(&zfcp_data.config_lock, flags);
183 zfcp_scsi_schedule_rports_block(adapter);
184 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
185
186 if (!link_down)
187 goto out;
188
189 switch (link_down->error_code) {
190 case FSF_PSQ_LINK_NO_LIGHT:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "There is no light signal from the local "
193 "fibre channel cable\n");
194 break;
195 case FSF_PSQ_LINK_WRAP_PLUG:
196 dev_warn(&req->adapter->ccw_device->dev,
197 "There is a wrap plug instead of a fibre "
198 "channel cable\n");
199 break;
200 case FSF_PSQ_LINK_NO_FCP:
201 dev_warn(&req->adapter->ccw_device->dev,
202 "The adjacent fibre channel node does not "
203 "support FCP\n");
204 break;
205 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
206 dev_warn(&req->adapter->ccw_device->dev,
207 "The FCP device is suspended because of a "
208 "firmware update\n");
209 break;
210 case FSF_PSQ_LINK_INVALID_WWPN:
211 dev_warn(&req->adapter->ccw_device->dev,
212 "The FCP device detected a WWPN that is "
213 "duplicate or not valid\n");
214 break;
215 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
216 dev_warn(&req->adapter->ccw_device->dev,
217 "The fibre channel fabric does not support NPIV\n");
218 break;
219 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The FCP adapter cannot support more NPIV ports\n");
222 break;
223 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
224 dev_warn(&req->adapter->ccw_device->dev,
225 "The adjacent switch cannot support "
226 "more NPIV ports\n");
227 break;
228 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
229 dev_warn(&req->adapter->ccw_device->dev,
230 "The FCP adapter could not log in to the "
231 "fibre channel fabric\n");
232 break;
233 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
234 dev_warn(&req->adapter->ccw_device->dev,
235 "The WWPN assignment file on the FCP adapter "
236 "has been damaged\n");
237 break;
238 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
239 dev_warn(&req->adapter->ccw_device->dev,
240 "The mode table on the FCP adapter "
241 "has been damaged\n");
242 break;
243 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
244 dev_warn(&req->adapter->ccw_device->dev,
245 "All NPIV ports on the FCP adapter have "
246 "been assigned\n");
247 break;
248 default:
249 dev_warn(&req->adapter->ccw_device->dev,
250 "The link between the FCP adapter and "
251 "the FC fabric is down\n");
252 }
253 out:
254 zfcp_erp_adapter_failed(adapter, id, req);
255 }
256
257 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
258 {
259 struct fsf_status_read_buffer *sr_buf = req->data;
260 struct fsf_link_down_info *ldi =
261 (struct fsf_link_down_info *) &sr_buf->payload;
262
263 switch (sr_buf->status_subtype) {
264 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
265 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
266 break;
267 case FSF_STATUS_READ_SUB_FDISC_FAILED:
268 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
269 break;
270 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
271 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
272 };
273 }
274
275 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
276 {
277 struct zfcp_adapter *adapter = req->adapter;
278 struct fsf_status_read_buffer *sr_buf = req->data;
279
280 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
281 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
282 mempool_free(sr_buf, adapter->pool.data_status_read);
283 zfcp_fsf_req_free(req);
284 return;
285 }
286
287 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
288
289 switch (sr_buf->status_type) {
290 case FSF_STATUS_READ_PORT_CLOSED:
291 zfcp_fsf_status_read_port_closed(req);
292 break;
293 case FSF_STATUS_READ_INCOMING_ELS:
294 zfcp_fc_incoming_els(req);
295 break;
296 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
297 break;
298 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
299 dev_warn(&adapter->ccw_device->dev,
300 "The error threshold for checksum statistics "
301 "has been exceeded\n");
302 zfcp_hba_dbf_event_berr(adapter, req);
303 break;
304 case FSF_STATUS_READ_LINK_DOWN:
305 zfcp_fsf_status_read_link_down(req);
306 break;
307 case FSF_STATUS_READ_LINK_UP:
308 dev_info(&adapter->ccw_device->dev,
309 "The local link has been restored\n");
310 /* All ports should be marked as ready to run again */
311 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
312 ZFCP_STATUS_COMMON_RUNNING,
313 ZFCP_SET);
314 zfcp_erp_adapter_reopen(adapter,
315 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
316 ZFCP_STATUS_COMMON_ERP_FAILED,
317 "fssrh_2", req);
318 break;
319 case FSF_STATUS_READ_NOTIFICATION_LOST:
320 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
321 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
322 req);
323 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
324 schedule_work(&adapter->scan_work);
325 break;
326 case FSF_STATUS_READ_CFDC_UPDATED:
327 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
328 break;
329 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
330 adapter->adapter_features = sr_buf->payload.word[0];
331 break;
332 }
333
334 mempool_free(sr_buf, adapter->pool.data_status_read);
335 zfcp_fsf_req_free(req);
336
337 atomic_inc(&adapter->stat_miss);
338 queue_work(zfcp_data.work_queue, &adapter->stat_work);
339 }
340
341 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
342 {
343 switch (req->qtcb->header.fsf_status_qual.word[0]) {
344 case FSF_SQ_FCP_RSP_AVAILABLE:
345 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
346 case FSF_SQ_NO_RETRY_POSSIBLE:
347 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
348 return;
349 case FSF_SQ_COMMAND_ABORTED:
350 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
351 break;
352 case FSF_SQ_NO_RECOM:
353 dev_err(&req->adapter->ccw_device->dev,
354 "The FCP adapter reported a problem "
355 "that cannot be recovered\n");
356 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
357 break;
358 }
359 /* all non-return stats set FSFREQ_ERROR*/
360 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
361 }
362
363 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
364 {
365 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
366 return;
367
368 switch (req->qtcb->header.fsf_status) {
369 case FSF_UNKNOWN_COMMAND:
370 dev_err(&req->adapter->ccw_device->dev,
371 "The FCP adapter does not recognize the command 0x%x\n",
372 req->qtcb->header.fsf_command);
373 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
374 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
375 break;
376 case FSF_ADAPTER_STATUS_AVAILABLE:
377 zfcp_fsf_fsfstatus_qual_eval(req);
378 break;
379 }
380 }
381
382 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
383 {
384 struct zfcp_adapter *adapter = req->adapter;
385 struct fsf_qtcb *qtcb = req->qtcb;
386 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
387
388 zfcp_hba_dbf_event_fsf_response(req);
389
390 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
391 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
392 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
393 return;
394 }
395
396 switch (qtcb->prefix.prot_status) {
397 case FSF_PROT_GOOD:
398 case FSF_PROT_FSF_STATUS_PRESENTED:
399 return;
400 case FSF_PROT_QTCB_VERSION_ERROR:
401 dev_err(&adapter->ccw_device->dev,
402 "QTCB version 0x%x not supported by FCP adapter "
403 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
404 psq->word[0], psq->word[1]);
405 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
406 break;
407 case FSF_PROT_ERROR_STATE:
408 case FSF_PROT_SEQ_NUMB_ERROR:
409 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
410 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
411 break;
412 case FSF_PROT_UNSUPP_QTCB_TYPE:
413 dev_err(&adapter->ccw_device->dev,
414 "The QTCB type is not supported by the FCP adapter\n");
415 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
416 break;
417 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
418 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
419 &adapter->status);
420 break;
421 case FSF_PROT_DUPLICATE_REQUEST_ID:
422 dev_err(&adapter->ccw_device->dev,
423 "0x%Lx is an ambiguous request identifier\n",
424 (unsigned long long)qtcb->bottom.support.req_handle);
425 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
426 break;
427 case FSF_PROT_LINK_DOWN:
428 zfcp_fsf_link_down_info_eval(req, "fspse_5",
429 &psq->link_down_info);
430 /* FIXME: reopening adapter now? better wait for link up */
431 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
432 break;
433 case FSF_PROT_REEST_QUEUE:
434 /* All ports should be marked as ready to run again */
435 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
436 ZFCP_STATUS_COMMON_RUNNING,
437 ZFCP_SET);
438 zfcp_erp_adapter_reopen(adapter,
439 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
440 ZFCP_STATUS_COMMON_ERP_FAILED,
441 "fspse_8", req);
442 break;
443 default:
444 dev_err(&adapter->ccw_device->dev,
445 "0x%x is not a valid transfer protocol status\n",
446 qtcb->prefix.prot_status);
447 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
448 }
449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
450 }
451
452 /**
453 * zfcp_fsf_req_complete - process completion of a FSF request
454 * @fsf_req: The FSF request that has been completed.
455 *
456 * When a request has been completed either from the FCP adapter,
457 * or it has been dismissed due to a queue shutdown, this function
458 * is called to process the completion status and trigger further
459 * events related to the FSF request.
460 */
461 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
462 {
463 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
464 zfcp_fsf_status_read_handler(req);
465 return;
466 }
467
468 del_timer(&req->timer);
469 zfcp_fsf_protstatus_eval(req);
470 zfcp_fsf_fsfstatus_eval(req);
471 req->handler(req);
472
473 if (req->erp_action)
474 zfcp_erp_notify(req->erp_action, 0);
475 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
476
477 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
478 zfcp_fsf_req_free(req);
479 else
480 /* notify initiator waiting for the requests completion */
481 /*
482 * FIXME: Race! We must not access fsf_req here as it might have been
483 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
484 * flag. It's an improbable case. But, we have the same paranoia for
485 * the cleanup flag already.
486 * Might better be handled using complete()?
487 * (setting the flag and doing wakeup ought to be atomic
488 * with regard to checking the flag as long as waitqueue is
489 * part of the to be released structure)
490 */
491 wake_up(&req->completion_wq);
492 }
493
494 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
495 {
496 struct fsf_qtcb_bottom_config *bottom;
497 struct zfcp_adapter *adapter = req->adapter;
498 struct Scsi_Host *shost = adapter->scsi_host;
499
500 bottom = &req->qtcb->bottom.config;
501
502 if (req->data)
503 memcpy(req->data, bottom, sizeof(*bottom));
504
505 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
506 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
507 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
508 fc_host_speed(shost) = bottom->fc_link_speed;
509 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
510
511 adapter->hydra_version = bottom->adapter_type;
512 adapter->timer_ticks = bottom->timer_interval;
513
514 if (fc_host_permanent_port_name(shost) == -1)
515 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
516
517 switch (bottom->fc_topology) {
518 case FSF_TOPO_P2P:
519 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
520 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
521 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
522 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
523 break;
524 case FSF_TOPO_FABRIC:
525 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
526 break;
527 case FSF_TOPO_AL:
528 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
529 /* fall through */
530 default:
531 dev_err(&adapter->ccw_device->dev,
532 "Unknown or unsupported arbitrated loop "
533 "fibre channel topology detected\n");
534 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
535 return -EIO;
536 }
537
538 return 0;
539 }
540
541 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
542 {
543 struct zfcp_adapter *adapter = req->adapter;
544 struct fsf_qtcb *qtcb = req->qtcb;
545 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
546 struct Scsi_Host *shost = adapter->scsi_host;
547
548 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
549 return;
550
551 adapter->fsf_lic_version = bottom->lic_version;
552 adapter->adapter_features = bottom->adapter_features;
553 adapter->connection_features = bottom->connection_features;
554 adapter->peer_wwpn = 0;
555 adapter->peer_wwnn = 0;
556 adapter->peer_d_id = 0;
557
558 switch (qtcb->header.fsf_status) {
559 case FSF_GOOD:
560 if (zfcp_fsf_exchange_config_evaluate(req))
561 return;
562
563 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
564 dev_err(&adapter->ccw_device->dev,
565 "FCP adapter maximum QTCB size (%d bytes) "
566 "is too small\n",
567 bottom->max_qtcb_size);
568 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
569 return;
570 }
571 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
572 &adapter->status);
573 break;
574 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
575 fc_host_node_name(shost) = 0;
576 fc_host_port_name(shost) = 0;
577 fc_host_port_id(shost) = 0;
578 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
579 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
580 adapter->hydra_version = 0;
581
582 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
583 &adapter->status);
584
585 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
586 &qtcb->header.fsf_status_qual.link_down_info);
587 break;
588 default:
589 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
590 return;
591 }
592
593 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
594 adapter->hardware_version = bottom->hardware_version;
595 memcpy(fc_host_serial_number(shost), bottom->serial_number,
596 min(FC_SERIAL_NUMBER_SIZE, 17));
597 EBCASC(fc_host_serial_number(shost),
598 min(FC_SERIAL_NUMBER_SIZE, 17));
599 }
600
601 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
602 dev_err(&adapter->ccw_device->dev,
603 "The FCP adapter only supports newer "
604 "control block versions\n");
605 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
606 return;
607 }
608 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
609 dev_err(&adapter->ccw_device->dev,
610 "The FCP adapter only supports older "
611 "control block versions\n");
612 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
613 }
614 }
615
616 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
617 {
618 struct zfcp_adapter *adapter = req->adapter;
619 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
620 struct Scsi_Host *shost = adapter->scsi_host;
621
622 if (req->data)
623 memcpy(req->data, bottom, sizeof(*bottom));
624
625 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
626 fc_host_permanent_port_name(shost) = bottom->wwpn;
627 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
628 } else
629 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
630 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
631 fc_host_supported_speeds(shost) = bottom->supported_speed;
632 }
633
634 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
635 {
636 struct fsf_qtcb *qtcb = req->qtcb;
637
638 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
639 return;
640
641 switch (qtcb->header.fsf_status) {
642 case FSF_GOOD:
643 zfcp_fsf_exchange_port_evaluate(req);
644 break;
645 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
646 zfcp_fsf_exchange_port_evaluate(req);
647 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
648 &qtcb->header.fsf_status_qual.link_down_info);
649 break;
650 }
651 }
652
653 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
654 {
655 struct zfcp_qdio_queue *req_q = &adapter->req_q;
656
657 spin_lock_bh(&adapter->req_q_lock);
658 if (atomic_read(&req_q->count))
659 return 1;
660 spin_unlock_bh(&adapter->req_q_lock);
661 return 0;
662 }
663
664 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
665 {
666 long ret;
667
668 spin_unlock_bh(&adapter->req_q_lock);
669 ret = wait_event_interruptible_timeout(adapter->request_wq,
670 zfcp_fsf_sbal_check(adapter), 5 * HZ);
671 if (ret > 0)
672 return 0;
673 if (!ret)
674 atomic_inc(&adapter->qdio_outb_full);
675
676 spin_lock_bh(&adapter->req_q_lock);
677 return -EIO;
678 }
679
680 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
681 {
682 struct zfcp_fsf_req *req;
683 req = mempool_alloc(pool, GFP_ATOMIC);
684 if (!req)
685 return NULL;
686 memset(req, 0, sizeof(*req));
687 req->pool = pool;
688 return req;
689 }
690
691 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
692 {
693 struct zfcp_fsf_req_qtcb *qtcb;
694
695 if (likely(pool))
696 qtcb = mempool_alloc(pool, GFP_ATOMIC);
697 else
698 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
699 GFP_ATOMIC);
700 if (unlikely(!qtcb))
701 return NULL;
702
703 memset(qtcb, 0, sizeof(*qtcb));
704 qtcb->fsf_req.qtcb = &qtcb->qtcb;
705 qtcb->fsf_req.pool = pool;
706
707 return &qtcb->fsf_req;
708 }
709
710 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
711 u32 fsf_cmd, int req_flags,
712 mempool_t *pool)
713 {
714 struct qdio_buffer_element *sbale;
715
716 struct zfcp_fsf_req *req;
717 struct zfcp_qdio_queue *req_q = &adapter->req_q;
718
719 if (req_flags & ZFCP_REQ_NO_QTCB)
720 req = zfcp_fsf_alloc_noqtcb(pool);
721 else
722 req = zfcp_fsf_alloc_qtcb(pool);
723
724 if (unlikely(!req))
725 return ERR_PTR(-EIO);
726
727 if (adapter->req_no == 0)
728 adapter->req_no++;
729
730 INIT_LIST_HEAD(&req->list);
731 init_timer(&req->timer);
732 init_waitqueue_head(&req->completion_wq);
733
734 req->adapter = adapter;
735 req->fsf_command = fsf_cmd;
736 req->req_id = adapter->req_no;
737 req->sbal_number = 1;
738 req->sbal_first = req_q->first;
739 req->sbal_last = req_q->first;
740 req->sbale_curr = 1;
741
742 sbale = zfcp_qdio_sbale_req(req);
743 sbale[0].addr = (void *) req->req_id;
744 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
745
746 if (likely(req->qtcb)) {
747 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
748 req->qtcb->prefix.req_id = req->req_id;
749 req->qtcb->prefix.ulp_info = 26;
750 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
751 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
752 req->qtcb->header.req_handle = req->req_id;
753 req->qtcb->header.fsf_command = req->fsf_command;
754 req->seq_no = adapter->fsf_req_seq_no;
755 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
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 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
766 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
767
768 return req;
769 }
770
771 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
772 {
773 struct zfcp_adapter *adapter = req->adapter;
774 unsigned long flags;
775 int idx;
776 int with_qtcb = (req->qtcb != NULL);
777
778 /* put allocated FSF request into hash table */
779 spin_lock_irqsave(&adapter->req_list_lock, flags);
780 idx = zfcp_reqlist_hash(req->req_id);
781 list_add_tail(&req->list, &adapter->req_list[idx]);
782 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
783
784 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
785 req->issued = get_clock();
786 if (zfcp_qdio_send(req)) {
787 del_timer(&req->timer);
788 spin_lock_irqsave(&adapter->req_list_lock, flags);
789 /* lookup request again, list might have changed */
790 if (zfcp_reqlist_find_safe(adapter, req))
791 zfcp_reqlist_remove(adapter, req);
792 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
793 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
794 return -EIO;
795 }
796
797 /* Don't increase for unsolicited status */
798 if (with_qtcb)
799 adapter->fsf_req_seq_no++;
800 adapter->req_no++;
801
802 return 0;
803 }
804
805 /**
806 * zfcp_fsf_status_read - send status read request
807 * @adapter: pointer to struct zfcp_adapter
808 * @req_flags: request flags
809 * Returns: 0 on success, ERROR otherwise
810 */
811 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
812 {
813 struct zfcp_fsf_req *req;
814 struct fsf_status_read_buffer *sr_buf;
815 struct qdio_buffer_element *sbale;
816 int retval = -EIO;
817
818 spin_lock_bh(&adapter->req_q_lock);
819 if (zfcp_fsf_req_sbal_get(adapter))
820 goto out;
821
822 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
823 ZFCP_REQ_NO_QTCB,
824 adapter->pool.fsf_req_status_read);
825 if (IS_ERR(req)) {
826 retval = PTR_ERR(req);
827 goto out;
828 }
829
830 sbale = zfcp_qdio_sbale_req(req);
831 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
832 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
833 req->sbale_curr = 2;
834
835 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
836 if (!sr_buf) {
837 retval = -ENOMEM;
838 goto failed_buf;
839 }
840 memset(sr_buf, 0, sizeof(*sr_buf));
841 req->data = sr_buf;
842 sbale = zfcp_qdio_sbale_curr(req);
843 sbale->addr = (void *) sr_buf;
844 sbale->length = sizeof(*sr_buf);
845
846 retval = zfcp_fsf_req_send(req);
847 if (retval)
848 goto failed_req_send;
849
850 goto out;
851
852 failed_req_send:
853 mempool_free(sr_buf, adapter->pool.data_status_read);
854 failed_buf:
855 zfcp_fsf_req_free(req);
856 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
857 out:
858 spin_unlock_bh(&adapter->req_q_lock);
859 return retval;
860 }
861
862 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
863 {
864 struct zfcp_unit *unit = req->data;
865 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
866
867 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
868 return;
869
870 switch (req->qtcb->header.fsf_status) {
871 case FSF_PORT_HANDLE_NOT_VALID:
872 if (fsq->word[0] == fsq->word[1]) {
873 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
874 "fsafch1", req);
875 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
876 }
877 break;
878 case FSF_LUN_HANDLE_NOT_VALID:
879 if (fsq->word[0] == fsq->word[1]) {
880 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
881 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
882 }
883 break;
884 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
885 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
886 break;
887 case FSF_PORT_BOXED:
888 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_LUN_BOXED:
893 zfcp_erp_unit_boxed(unit, "fsafch4", req);
894 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
895 ZFCP_STATUS_FSFREQ_RETRY;
896 break;
897 case FSF_ADAPTER_STATUS_AVAILABLE:
898 switch (fsq->word[0]) {
899 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
900 zfcp_test_link(unit->port);
901 /* fall through */
902 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
904 break;
905 }
906 break;
907 case FSF_GOOD:
908 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
909 break;
910 }
911 }
912
913 /**
914 * zfcp_fsf_abort_fcp_command - abort running SCSI command
915 * @old_req_id: unsigned long
916 * @unit: pointer to struct zfcp_unit
917 * Returns: pointer to struct zfcp_fsf_req
918 */
919
920 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
921 struct zfcp_unit *unit)
922 {
923 struct qdio_buffer_element *sbale;
924 struct zfcp_fsf_req *req = NULL;
925 struct zfcp_adapter *adapter = unit->port->adapter;
926
927 spin_lock_bh(&adapter->req_q_lock);
928 if (zfcp_fsf_req_sbal_get(adapter))
929 goto out;
930 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
931 0, adapter->pool.fsf_req_abort);
932 if (IS_ERR(req)) {
933 req = NULL;
934 goto out;
935 }
936
937 if (unlikely(!(atomic_read(&unit->status) &
938 ZFCP_STATUS_COMMON_UNBLOCKED)))
939 goto out_error_free;
940
941 sbale = zfcp_qdio_sbale_req(req);
942 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
943 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
944
945 req->data = unit;
946 req->handler = zfcp_fsf_abort_fcp_command_handler;
947 req->qtcb->header.lun_handle = unit->handle;
948 req->qtcb->header.port_handle = unit->port->handle;
949 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
950
951 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
952 if (!zfcp_fsf_req_send(req))
953 goto out;
954
955 out_error_free:
956 zfcp_fsf_req_free(req);
957 req = NULL;
958 out:
959 spin_unlock_bh(&adapter->req_q_lock);
960 return req;
961 }
962
963 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
964 {
965 struct zfcp_adapter *adapter = req->adapter;
966 struct zfcp_send_ct *send_ct = req->data;
967 struct fsf_qtcb_header *header = &req->qtcb->header;
968
969 send_ct->status = -EINVAL;
970
971 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
972 goto skip_fsfstatus;
973
974 switch (header->fsf_status) {
975 case FSF_GOOD:
976 zfcp_san_dbf_event_ct_response(req);
977 send_ct->status = 0;
978 break;
979 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
980 zfcp_fsf_class_not_supp(req);
981 break;
982 case FSF_ADAPTER_STATUS_AVAILABLE:
983 switch (header->fsf_status_qual.word[0]){
984 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
985 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
986 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
987 break;
988 }
989 break;
990 case FSF_ACCESS_DENIED:
991 break;
992 case FSF_PORT_BOXED:
993 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
994 ZFCP_STATUS_FSFREQ_RETRY;
995 break;
996 case FSF_PORT_HANDLE_NOT_VALID:
997 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
998 /* fall through */
999 case FSF_GENERIC_COMMAND_REJECTED:
1000 case FSF_PAYLOAD_SIZE_MISMATCH:
1001 case FSF_REQUEST_SIZE_TOO_LARGE:
1002 case FSF_RESPONSE_SIZE_TOO_LARGE:
1003 case FSF_SBAL_MISMATCH:
1004 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1005 break;
1006 }
1007
1008 skip_fsfstatus:
1009 if (send_ct->handler)
1010 send_ct->handler(send_ct->handler_data);
1011 }
1012
1013 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1014 struct scatterlist *sg_req,
1015 struct scatterlist *sg_resp,
1016 int max_sbals)
1017 {
1018 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1019 u32 feat = req->adapter->adapter_features;
1020 int bytes;
1021
1022 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1023 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1024 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1025 return -EOPNOTSUPP;
1026
1027 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1028 sbale[2].addr = sg_virt(sg_req);
1029 sbale[2].length = sg_req->length;
1030 sbale[3].addr = sg_virt(sg_resp);
1031 sbale[3].length = sg_resp->length;
1032 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1033 return 0;
1034 }
1035
1036 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1037 sg_req, max_sbals);
1038 if (bytes <= 0)
1039 return -ENOMEM;
1040 req->qtcb->bottom.support.req_buf_length = bytes;
1041 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1042
1043 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1044 sg_resp, max_sbals);
1045 if (bytes <= 0)
1046 return -ENOMEM;
1047 req->qtcb->bottom.support.resp_buf_length = bytes;
1048
1049 return 0;
1050 }
1051
1052 /**
1053 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1054 * @ct: pointer to struct zfcp_send_ct with data for request
1055 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1056 * @erp_action: if non-null the Generic Service request sent within ERP
1057 */
1058 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1059 struct zfcp_erp_action *erp_action)
1060 {
1061 struct zfcp_wka_port *wka_port = ct->wka_port;
1062 struct zfcp_adapter *adapter = wka_port->adapter;
1063 struct zfcp_fsf_req *req;
1064 int ret = -EIO;
1065
1066 spin_lock_bh(&adapter->req_q_lock);
1067 if (zfcp_fsf_req_sbal_get(adapter))
1068 goto out;
1069
1070 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1071 ZFCP_REQ_AUTO_CLEANUP, pool);
1072 if (IS_ERR(req)) {
1073 ret = PTR_ERR(req);
1074 goto out;
1075 }
1076
1077 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1078 FSF_MAX_SBALS_PER_REQ);
1079 if (ret)
1080 goto failed_send;
1081
1082 req->handler = zfcp_fsf_send_ct_handler;
1083 req->qtcb->header.port_handle = wka_port->handle;
1084 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1085 req->qtcb->bottom.support.timeout = ct->timeout;
1086 req->data = ct;
1087
1088 zfcp_san_dbf_event_ct_request(req);
1089
1090 if (erp_action) {
1091 erp_action->fsf_req = req;
1092 req->erp_action = erp_action;
1093 zfcp_fsf_start_erp_timer(req);
1094 } else
1095 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1096
1097 ret = zfcp_fsf_req_send(req);
1098 if (ret)
1099 goto failed_send;
1100
1101 goto out;
1102
1103 failed_send:
1104 zfcp_fsf_req_free(req);
1105 if (erp_action)
1106 erp_action->fsf_req = NULL;
1107 out:
1108 spin_unlock_bh(&adapter->req_q_lock);
1109 return ret;
1110 }
1111
1112 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1113 {
1114 struct zfcp_send_els *send_els = req->data;
1115 struct zfcp_port *port = send_els->port;
1116 struct fsf_qtcb_header *header = &req->qtcb->header;
1117
1118 send_els->status = -EINVAL;
1119
1120 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1121 goto skip_fsfstatus;
1122
1123 switch (header->fsf_status) {
1124 case FSF_GOOD:
1125 zfcp_san_dbf_event_els_response(req);
1126 send_els->status = 0;
1127 break;
1128 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1129 zfcp_fsf_class_not_supp(req);
1130 break;
1131 case FSF_ADAPTER_STATUS_AVAILABLE:
1132 switch (header->fsf_status_qual.word[0]){
1133 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1134 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1135 zfcp_test_link(port);
1136 /*fall through */
1137 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1138 case FSF_SQ_RETRY_IF_POSSIBLE:
1139 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1140 break;
1141 }
1142 break;
1143 case FSF_ELS_COMMAND_REJECTED:
1144 case FSF_PAYLOAD_SIZE_MISMATCH:
1145 case FSF_REQUEST_SIZE_TOO_LARGE:
1146 case FSF_RESPONSE_SIZE_TOO_LARGE:
1147 break;
1148 case FSF_ACCESS_DENIED:
1149 if (port)
1150 zfcp_fsf_access_denied_port(req, port);
1151 break;
1152 case FSF_SBAL_MISMATCH:
1153 /* should never occure, avoided in zfcp_fsf_send_els */
1154 /* fall through */
1155 default:
1156 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1157 break;
1158 }
1159 skip_fsfstatus:
1160 if (send_els->handler)
1161 send_els->handler(send_els->handler_data);
1162 }
1163
1164 /**
1165 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1166 * @els: pointer to struct zfcp_send_els with data for the command
1167 */
1168 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1169 {
1170 struct zfcp_fsf_req *req;
1171 struct zfcp_adapter *adapter = els->adapter;
1172 struct fsf_qtcb_bottom_support *bottom;
1173 int ret = -EIO;
1174
1175 spin_lock_bh(&adapter->req_q_lock);
1176 if (zfcp_fsf_req_sbal_get(adapter))
1177 goto out;
1178 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1179 ZFCP_REQ_AUTO_CLEANUP, NULL);
1180 if (IS_ERR(req)) {
1181 ret = PTR_ERR(req);
1182 goto out;
1183 }
1184
1185 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1186
1187 if (ret)
1188 goto failed_send;
1189
1190 bottom = &req->qtcb->bottom.support;
1191 req->handler = zfcp_fsf_send_els_handler;
1192 bottom->d_id = els->d_id;
1193 bottom->service_class = FSF_CLASS_3;
1194 bottom->timeout = 2 * R_A_TOV;
1195 req->data = els;
1196
1197 zfcp_san_dbf_event_els_request(req);
1198
1199 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1200 ret = zfcp_fsf_req_send(req);
1201 if (ret)
1202 goto failed_send;
1203
1204 goto out;
1205
1206 failed_send:
1207 zfcp_fsf_req_free(req);
1208 out:
1209 spin_unlock_bh(&adapter->req_q_lock);
1210 return ret;
1211 }
1212
1213 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1214 {
1215 struct qdio_buffer_element *sbale;
1216 struct zfcp_fsf_req *req;
1217 struct zfcp_adapter *adapter = erp_action->adapter;
1218 int retval = -EIO;
1219
1220 spin_lock_bh(&adapter->req_q_lock);
1221 if (zfcp_fsf_req_sbal_get(adapter))
1222 goto out;
1223 req = zfcp_fsf_req_create(adapter,
1224 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1225 ZFCP_REQ_AUTO_CLEANUP,
1226 adapter->pool.fsf_req_erp);
1227 if (IS_ERR(req)) {
1228 retval = PTR_ERR(req);
1229 goto out;
1230 }
1231
1232 sbale = zfcp_qdio_sbale_req(req);
1233 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1234 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1235
1236 req->qtcb->bottom.config.feature_selection =
1237 FSF_FEATURE_CFDC |
1238 FSF_FEATURE_LUN_SHARING |
1239 FSF_FEATURE_NOTIFICATION_LOST |
1240 FSF_FEATURE_UPDATE_ALERT;
1241 req->erp_action = erp_action;
1242 req->handler = zfcp_fsf_exchange_config_data_handler;
1243 erp_action->fsf_req = req;
1244
1245 zfcp_fsf_start_erp_timer(req);
1246 retval = zfcp_fsf_req_send(req);
1247 if (retval) {
1248 zfcp_fsf_req_free(req);
1249 erp_action->fsf_req = NULL;
1250 }
1251 out:
1252 spin_unlock_bh(&adapter->req_q_lock);
1253 return retval;
1254 }
1255
1256 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1257 struct fsf_qtcb_bottom_config *data)
1258 {
1259 struct qdio_buffer_element *sbale;
1260 struct zfcp_fsf_req *req = NULL;
1261 int retval = -EIO;
1262
1263 spin_lock_bh(&adapter->req_q_lock);
1264 if (zfcp_fsf_req_sbal_get(adapter))
1265 goto out_unlock;
1266
1267 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1268 0, NULL);
1269 if (IS_ERR(req)) {
1270 retval = PTR_ERR(req);
1271 goto out_unlock;
1272 }
1273
1274 sbale = zfcp_qdio_sbale_req(req);
1275 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1276 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1277 req->handler = zfcp_fsf_exchange_config_data_handler;
1278
1279 req->qtcb->bottom.config.feature_selection =
1280 FSF_FEATURE_CFDC |
1281 FSF_FEATURE_LUN_SHARING |
1282 FSF_FEATURE_NOTIFICATION_LOST |
1283 FSF_FEATURE_UPDATE_ALERT;
1284
1285 if (data)
1286 req->data = data;
1287
1288 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1289 retval = zfcp_fsf_req_send(req);
1290 spin_unlock_bh(&adapter->req_q_lock);
1291 if (!retval)
1292 wait_event(req->completion_wq,
1293 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1294
1295 zfcp_fsf_req_free(req);
1296 return retval;
1297
1298 out_unlock:
1299 spin_unlock_bh(&adapter->req_q_lock);
1300 return retval;
1301 }
1302
1303 /**
1304 * zfcp_fsf_exchange_port_data - request information about local port
1305 * @erp_action: ERP action for the adapter for which port data is requested
1306 * Returns: 0 on success, error otherwise
1307 */
1308 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1309 {
1310 struct qdio_buffer_element *sbale;
1311 struct zfcp_fsf_req *req;
1312 struct zfcp_adapter *adapter = erp_action->adapter;
1313 int retval = -EIO;
1314
1315 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1316 return -EOPNOTSUPP;
1317
1318 spin_lock_bh(&adapter->req_q_lock);
1319 if (zfcp_fsf_req_sbal_get(adapter))
1320 goto out;
1321 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1322 ZFCP_REQ_AUTO_CLEANUP,
1323 adapter->pool.fsf_req_erp);
1324 if (IS_ERR(req)) {
1325 retval = PTR_ERR(req);
1326 goto out;
1327 }
1328
1329 sbale = zfcp_qdio_sbale_req(req);
1330 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1331 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1332
1333 req->handler = zfcp_fsf_exchange_port_data_handler;
1334 req->erp_action = erp_action;
1335 erp_action->fsf_req = req;
1336
1337 zfcp_fsf_start_erp_timer(req);
1338 retval = zfcp_fsf_req_send(req);
1339 if (retval) {
1340 zfcp_fsf_req_free(req);
1341 erp_action->fsf_req = NULL;
1342 }
1343 out:
1344 spin_unlock_bh(&adapter->req_q_lock);
1345 return retval;
1346 }
1347
1348 /**
1349 * zfcp_fsf_exchange_port_data_sync - request information about local port
1350 * @adapter: pointer to struct zfcp_adapter
1351 * @data: pointer to struct fsf_qtcb_bottom_port
1352 * Returns: 0 on success, error otherwise
1353 */
1354 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1355 struct fsf_qtcb_bottom_port *data)
1356 {
1357 struct qdio_buffer_element *sbale;
1358 struct zfcp_fsf_req *req = NULL;
1359 int retval = -EIO;
1360
1361 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1362 return -EOPNOTSUPP;
1363
1364 spin_lock_bh(&adapter->req_q_lock);
1365 if (zfcp_fsf_req_sbal_get(adapter))
1366 goto out_unlock;
1367
1368 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1369 NULL);
1370 if (IS_ERR(req)) {
1371 retval = PTR_ERR(req);
1372 goto out_unlock;
1373 }
1374
1375 if (data)
1376 req->data = data;
1377
1378 sbale = zfcp_qdio_sbale_req(req);
1379 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1380 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1381
1382 req->handler = zfcp_fsf_exchange_port_data_handler;
1383 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1384 retval = zfcp_fsf_req_send(req);
1385 spin_unlock_bh(&adapter->req_q_lock);
1386
1387 if (!retval)
1388 wait_event(req->completion_wq,
1389 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1390 zfcp_fsf_req_free(req);
1391
1392 return retval;
1393
1394 out_unlock:
1395 spin_unlock_bh(&adapter->req_q_lock);
1396 return retval;
1397 }
1398
1399 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1400 {
1401 struct zfcp_port *port = req->data;
1402 struct fsf_qtcb_header *header = &req->qtcb->header;
1403 struct fsf_plogi *plogi;
1404
1405 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1406 goto out;
1407
1408 switch (header->fsf_status) {
1409 case FSF_PORT_ALREADY_OPEN:
1410 break;
1411 case FSF_ACCESS_DENIED:
1412 zfcp_fsf_access_denied_port(req, port);
1413 break;
1414 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1415 dev_warn(&req->adapter->ccw_device->dev,
1416 "Not enough FCP adapter resources to open "
1417 "remote port 0x%016Lx\n",
1418 (unsigned long long)port->wwpn);
1419 zfcp_erp_port_failed(port, "fsoph_1", req);
1420 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1421 break;
1422 case FSF_ADAPTER_STATUS_AVAILABLE:
1423 switch (header->fsf_status_qual.word[0]) {
1424 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1425 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1426 case FSF_SQ_NO_RETRY_POSSIBLE:
1427 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1428 break;
1429 }
1430 break;
1431 case FSF_GOOD:
1432 port->handle = header->port_handle;
1433 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1434 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1435 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1436 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1437 &port->status);
1438 /* check whether D_ID has changed during open */
1439 /*
1440 * FIXME: This check is not airtight, as the FCP channel does
1441 * not monitor closures of target port connections caused on
1442 * the remote side. Thus, they might miss out on invalidating
1443 * locally cached WWPNs (and other N_Port parameters) of gone
1444 * target ports. So, our heroic attempt to make things safe
1445 * could be undermined by 'open port' response data tagged with
1446 * obsolete WWPNs. Another reason to monitor potential
1447 * connection closures ourself at least (by interpreting
1448 * incoming ELS' and unsolicited status). It just crosses my
1449 * mind that one should be able to cross-check by means of
1450 * another GID_PN straight after a port has been opened.
1451 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1452 */
1453 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1454 if (req->qtcb->bottom.support.els1_length >=
1455 FSF_PLOGI_MIN_LEN) {
1456 if (plogi->serv_param.wwpn != port->wwpn)
1457 port->d_id = 0;
1458 else {
1459 port->wwnn = plogi->serv_param.wwnn;
1460 zfcp_fc_plogi_evaluate(port, plogi);
1461 }
1462 }
1463 break;
1464 case FSF_UNKNOWN_OP_SUBTYPE:
1465 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1466 break;
1467 }
1468
1469 out:
1470 zfcp_port_put(port);
1471 }
1472
1473 /**
1474 * zfcp_fsf_open_port - create and send open port request
1475 * @erp_action: pointer to struct zfcp_erp_action
1476 * Returns: 0 on success, error otherwise
1477 */
1478 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1479 {
1480 struct qdio_buffer_element *sbale;
1481 struct zfcp_adapter *adapter = erp_action->adapter;
1482 struct zfcp_fsf_req *req;
1483 struct zfcp_port *port = erp_action->port;
1484 int retval = -EIO;
1485
1486 spin_lock_bh(&adapter->req_q_lock);
1487 if (zfcp_fsf_req_sbal_get(adapter))
1488 goto out;
1489
1490 req = zfcp_fsf_req_create(adapter,
1491 FSF_QTCB_OPEN_PORT_WITH_DID,
1492 ZFCP_REQ_AUTO_CLEANUP,
1493 adapter->pool.fsf_req_erp);
1494 if (IS_ERR(req)) {
1495 retval = PTR_ERR(req);
1496 goto out;
1497 }
1498
1499 sbale = zfcp_qdio_sbale_req(req);
1500 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1501 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1502
1503 req->handler = zfcp_fsf_open_port_handler;
1504 req->qtcb->bottom.support.d_id = port->d_id;
1505 req->data = port;
1506 req->erp_action = erp_action;
1507 erp_action->fsf_req = req;
1508 zfcp_port_get(port);
1509
1510 zfcp_fsf_start_erp_timer(req);
1511 retval = zfcp_fsf_req_send(req);
1512 if (retval) {
1513 zfcp_fsf_req_free(req);
1514 erp_action->fsf_req = NULL;
1515 zfcp_port_put(port);
1516 }
1517 out:
1518 spin_unlock_bh(&adapter->req_q_lock);
1519 return retval;
1520 }
1521
1522 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1523 {
1524 struct zfcp_port *port = req->data;
1525
1526 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1527 return;
1528
1529 switch (req->qtcb->header.fsf_status) {
1530 case FSF_PORT_HANDLE_NOT_VALID:
1531 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1532 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1533 break;
1534 case FSF_ADAPTER_STATUS_AVAILABLE:
1535 break;
1536 case FSF_GOOD:
1537 zfcp_erp_modify_port_status(port, "fscph_2", req,
1538 ZFCP_STATUS_COMMON_OPEN,
1539 ZFCP_CLEAR);
1540 break;
1541 }
1542 }
1543
1544 /**
1545 * zfcp_fsf_close_port - create and send close port request
1546 * @erp_action: pointer to struct zfcp_erp_action
1547 * Returns: 0 on success, error otherwise
1548 */
1549 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1550 {
1551 struct qdio_buffer_element *sbale;
1552 struct zfcp_adapter *adapter = erp_action->adapter;
1553 struct zfcp_fsf_req *req;
1554 int retval = -EIO;
1555
1556 spin_lock_bh(&adapter->req_q_lock);
1557 if (zfcp_fsf_req_sbal_get(adapter))
1558 goto out;
1559
1560 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1561 ZFCP_REQ_AUTO_CLEANUP,
1562 adapter->pool.fsf_req_erp);
1563 if (IS_ERR(req)) {
1564 retval = PTR_ERR(req);
1565 goto out;
1566 }
1567
1568 sbale = zfcp_qdio_sbale_req(req);
1569 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1570 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1571
1572 req->handler = zfcp_fsf_close_port_handler;
1573 req->data = erp_action->port;
1574 req->erp_action = erp_action;
1575 req->qtcb->header.port_handle = erp_action->port->handle;
1576 erp_action->fsf_req = req;
1577
1578 zfcp_fsf_start_erp_timer(req);
1579 retval = zfcp_fsf_req_send(req);
1580 if (retval) {
1581 zfcp_fsf_req_free(req);
1582 erp_action->fsf_req = NULL;
1583 }
1584 out:
1585 spin_unlock_bh(&adapter->req_q_lock);
1586 return retval;
1587 }
1588
1589 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1590 {
1591 struct zfcp_wka_port *wka_port = req->data;
1592 struct fsf_qtcb_header *header = &req->qtcb->header;
1593
1594 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1595 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1596 goto out;
1597 }
1598
1599 switch (header->fsf_status) {
1600 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1601 dev_warn(&req->adapter->ccw_device->dev,
1602 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1603 /* fall through */
1604 case FSF_ADAPTER_STATUS_AVAILABLE:
1605 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1606 /* fall through */
1607 case FSF_ACCESS_DENIED:
1608 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1609 break;
1610 case FSF_PORT_ALREADY_OPEN:
1611 break;
1612 case FSF_GOOD:
1613 wka_port->handle = header->port_handle;
1614 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1615 }
1616 out:
1617 wake_up(&wka_port->completion_wq);
1618 }
1619
1620 /**
1621 * zfcp_fsf_open_wka_port - create and send open wka-port request
1622 * @wka_port: pointer to struct zfcp_wka_port
1623 * Returns: 0 on success, error otherwise
1624 */
1625 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1626 {
1627 struct qdio_buffer_element *sbale;
1628 struct zfcp_adapter *adapter = wka_port->adapter;
1629 struct zfcp_fsf_req *req;
1630 int retval = -EIO;
1631
1632 spin_lock_bh(&adapter->req_q_lock);
1633 if (zfcp_fsf_req_sbal_get(adapter))
1634 goto out;
1635
1636 req = zfcp_fsf_req_create(adapter,
1637 FSF_QTCB_OPEN_PORT_WITH_DID,
1638 ZFCP_REQ_AUTO_CLEANUP,
1639 adapter->pool.fsf_req_erp);
1640 if (unlikely(IS_ERR(req))) {
1641 retval = PTR_ERR(req);
1642 goto out;
1643 }
1644
1645 sbale = zfcp_qdio_sbale_req(req);
1646 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1647 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1648
1649 req->handler = zfcp_fsf_open_wka_port_handler;
1650 req->qtcb->bottom.support.d_id = wka_port->d_id;
1651 req->data = wka_port;
1652
1653 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1654 retval = zfcp_fsf_req_send(req);
1655 if (retval)
1656 zfcp_fsf_req_free(req);
1657 out:
1658 spin_unlock_bh(&adapter->req_q_lock);
1659 return retval;
1660 }
1661
1662 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1663 {
1664 struct zfcp_wka_port *wka_port = req->data;
1665
1666 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1667 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1668 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1669 }
1670
1671 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1672 wake_up(&wka_port->completion_wq);
1673 }
1674
1675 /**
1676 * zfcp_fsf_close_wka_port - create and send close wka port request
1677 * @erp_action: pointer to struct zfcp_erp_action
1678 * Returns: 0 on success, error otherwise
1679 */
1680 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1681 {
1682 struct qdio_buffer_element *sbale;
1683 struct zfcp_adapter *adapter = wka_port->adapter;
1684 struct zfcp_fsf_req *req;
1685 int retval = -EIO;
1686
1687 spin_lock_bh(&adapter->req_q_lock);
1688 if (zfcp_fsf_req_sbal_get(adapter))
1689 goto out;
1690
1691 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1692 ZFCP_REQ_AUTO_CLEANUP,
1693 adapter->pool.fsf_req_erp);
1694 if (unlikely(IS_ERR(req))) {
1695 retval = PTR_ERR(req);
1696 goto out;
1697 }
1698
1699 sbale = zfcp_qdio_sbale_req(req);
1700 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1701 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1702
1703 req->handler = zfcp_fsf_close_wka_port_handler;
1704 req->data = wka_port;
1705 req->qtcb->header.port_handle = wka_port->handle;
1706
1707 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1708 retval = zfcp_fsf_req_send(req);
1709 if (retval)
1710 zfcp_fsf_req_free(req);
1711 out:
1712 spin_unlock_bh(&adapter->req_q_lock);
1713 return retval;
1714 }
1715
1716 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1717 {
1718 struct zfcp_port *port = req->data;
1719 struct fsf_qtcb_header *header = &req->qtcb->header;
1720 struct zfcp_unit *unit;
1721
1722 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1723 return;
1724
1725 switch (header->fsf_status) {
1726 case FSF_PORT_HANDLE_NOT_VALID:
1727 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1728 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1729 break;
1730 case FSF_ACCESS_DENIED:
1731 zfcp_fsf_access_denied_port(req, port);
1732 break;
1733 case FSF_PORT_BOXED:
1734 zfcp_erp_port_boxed(port, "fscpph2", req);
1735 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1736 ZFCP_STATUS_FSFREQ_RETRY;
1737 /* can't use generic zfcp_erp_modify_port_status because
1738 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1739 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1740 list_for_each_entry(unit, &port->unit_list_head, list)
1741 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1742 &unit->status);
1743 break;
1744 case FSF_ADAPTER_STATUS_AVAILABLE:
1745 switch (header->fsf_status_qual.word[0]) {
1746 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1747 /* fall through */
1748 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1749 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1750 break;
1751 }
1752 break;
1753 case FSF_GOOD:
1754 /* can't use generic zfcp_erp_modify_port_status because
1755 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1756 */
1757 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1758 list_for_each_entry(unit, &port->unit_list_head, list)
1759 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1760 &unit->status);
1761 break;
1762 }
1763 }
1764
1765 /**
1766 * zfcp_fsf_close_physical_port - close physical port
1767 * @erp_action: pointer to struct zfcp_erp_action
1768 * Returns: 0 on success
1769 */
1770 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1771 {
1772 struct qdio_buffer_element *sbale;
1773 struct zfcp_adapter *adapter = erp_action->adapter;
1774 struct zfcp_fsf_req *req;
1775 int retval = -EIO;
1776
1777 spin_lock_bh(&adapter->req_q_lock);
1778 if (zfcp_fsf_req_sbal_get(adapter))
1779 goto out;
1780
1781 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1782 ZFCP_REQ_AUTO_CLEANUP,
1783 adapter->pool.fsf_req_erp);
1784 if (IS_ERR(req)) {
1785 retval = PTR_ERR(req);
1786 goto out;
1787 }
1788
1789 sbale = zfcp_qdio_sbale_req(req);
1790 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1791 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1792
1793 req->data = erp_action->port;
1794 req->qtcb->header.port_handle = erp_action->port->handle;
1795 req->erp_action = erp_action;
1796 req->handler = zfcp_fsf_close_physical_port_handler;
1797 erp_action->fsf_req = req;
1798
1799 zfcp_fsf_start_erp_timer(req);
1800 retval = zfcp_fsf_req_send(req);
1801 if (retval) {
1802 zfcp_fsf_req_free(req);
1803 erp_action->fsf_req = NULL;
1804 }
1805 out:
1806 spin_unlock_bh(&adapter->req_q_lock);
1807 return retval;
1808 }
1809
1810 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1811 {
1812 struct zfcp_adapter *adapter = req->adapter;
1813 struct zfcp_unit *unit = req->data;
1814 struct fsf_qtcb_header *header = &req->qtcb->header;
1815 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1816 struct fsf_queue_designator *queue_designator =
1817 &header->fsf_status_qual.fsf_queue_designator;
1818 int exclusive, readwrite;
1819
1820 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1821 return;
1822
1823 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1824 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1825 ZFCP_STATUS_UNIT_SHARED |
1826 ZFCP_STATUS_UNIT_READONLY,
1827 &unit->status);
1828
1829 switch (header->fsf_status) {
1830
1831 case FSF_PORT_HANDLE_NOT_VALID:
1832 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1833 /* fall through */
1834 case FSF_LUN_ALREADY_OPEN:
1835 break;
1836 case FSF_ACCESS_DENIED:
1837 zfcp_fsf_access_denied_unit(req, unit);
1838 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1839 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1840 break;
1841 case FSF_PORT_BOXED:
1842 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1843 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1844 ZFCP_STATUS_FSFREQ_RETRY;
1845 break;
1846 case FSF_LUN_SHARING_VIOLATION:
1847 if (header->fsf_status_qual.word[0])
1848 dev_warn(&adapter->ccw_device->dev,
1849 "LUN 0x%Lx on port 0x%Lx is already in "
1850 "use by CSS%d, MIF Image ID %x\n",
1851 (unsigned long long)unit->fcp_lun,
1852 (unsigned long long)unit->port->wwpn,
1853 queue_designator->cssid,
1854 queue_designator->hla);
1855 else
1856 zfcp_act_eval_err(adapter,
1857 header->fsf_status_qual.word[2]);
1858 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1859 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1860 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1861 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1862 break;
1863 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1864 dev_warn(&adapter->ccw_device->dev,
1865 "No handle is available for LUN "
1866 "0x%016Lx on port 0x%016Lx\n",
1867 (unsigned long long)unit->fcp_lun,
1868 (unsigned long long)unit->port->wwpn);
1869 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1870 /* fall through */
1871 case FSF_INVALID_COMMAND_OPTION:
1872 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1873 break;
1874 case FSF_ADAPTER_STATUS_AVAILABLE:
1875 switch (header->fsf_status_qual.word[0]) {
1876 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1877 zfcp_test_link(unit->port);
1878 /* fall through */
1879 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1880 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1881 break;
1882 }
1883 break;
1884
1885 case FSF_GOOD:
1886 unit->handle = header->lun_handle;
1887 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1888
1889 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1890 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1891 !zfcp_ccw_priv_sch(adapter)) {
1892 exclusive = (bottom->lun_access_info &
1893 FSF_UNIT_ACCESS_EXCLUSIVE);
1894 readwrite = (bottom->lun_access_info &
1895 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1896
1897 if (!exclusive)
1898 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1899 &unit->status);
1900
1901 if (!readwrite) {
1902 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1903 &unit->status);
1904 dev_info(&adapter->ccw_device->dev,
1905 "SCSI device at LUN 0x%016Lx on port "
1906 "0x%016Lx opened read-only\n",
1907 (unsigned long long)unit->fcp_lun,
1908 (unsigned long long)unit->port->wwpn);
1909 }
1910
1911 if (exclusive && !readwrite) {
1912 dev_err(&adapter->ccw_device->dev,
1913 "Exclusive read-only access not "
1914 "supported (unit 0x%016Lx, "
1915 "port 0x%016Lx)\n",
1916 (unsigned long long)unit->fcp_lun,
1917 (unsigned long long)unit->port->wwpn);
1918 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1919 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1920 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1921 } else if (!exclusive && readwrite) {
1922 dev_err(&adapter->ccw_device->dev,
1923 "Shared read-write access not "
1924 "supported (unit 0x%016Lx, port "
1925 "0x%016Lx)\n",
1926 (unsigned long long)unit->fcp_lun,
1927 (unsigned long long)unit->port->wwpn);
1928 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1929 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1930 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1931 }
1932 }
1933 break;
1934 }
1935 }
1936
1937 /**
1938 * zfcp_fsf_open_unit - open unit
1939 * @erp_action: pointer to struct zfcp_erp_action
1940 * Returns: 0 on success, error otherwise
1941 */
1942 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1943 {
1944 struct qdio_buffer_element *sbale;
1945 struct zfcp_adapter *adapter = erp_action->adapter;
1946 struct zfcp_fsf_req *req;
1947 int retval = -EIO;
1948
1949 spin_lock_bh(&adapter->req_q_lock);
1950 if (zfcp_fsf_req_sbal_get(adapter))
1951 goto out;
1952
1953 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1954 ZFCP_REQ_AUTO_CLEANUP,
1955 adapter->pool.fsf_req_erp);
1956 if (IS_ERR(req)) {
1957 retval = PTR_ERR(req);
1958 goto out;
1959 }
1960
1961 sbale = zfcp_qdio_sbale_req(req);
1962 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1963 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1964
1965 req->qtcb->header.port_handle = erp_action->port->handle;
1966 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1967 req->handler = zfcp_fsf_open_unit_handler;
1968 req->data = erp_action->unit;
1969 req->erp_action = erp_action;
1970 erp_action->fsf_req = req;
1971
1972 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1973 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1974
1975 zfcp_fsf_start_erp_timer(req);
1976 retval = zfcp_fsf_req_send(req);
1977 if (retval) {
1978 zfcp_fsf_req_free(req);
1979 erp_action->fsf_req = NULL;
1980 }
1981 out:
1982 spin_unlock_bh(&adapter->req_q_lock);
1983 return retval;
1984 }
1985
1986 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1987 {
1988 struct zfcp_unit *unit = req->data;
1989
1990 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1991 return;
1992
1993 switch (req->qtcb->header.fsf_status) {
1994 case FSF_PORT_HANDLE_NOT_VALID:
1995 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
1996 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1997 break;
1998 case FSF_LUN_HANDLE_NOT_VALID:
1999 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2000 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2001 break;
2002 case FSF_PORT_BOXED:
2003 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2004 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2005 ZFCP_STATUS_FSFREQ_RETRY;
2006 break;
2007 case FSF_ADAPTER_STATUS_AVAILABLE:
2008 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2009 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2010 zfcp_test_link(unit->port);
2011 /* fall through */
2012 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2013 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2014 break;
2015 }
2016 break;
2017 case FSF_GOOD:
2018 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2019 break;
2020 }
2021 }
2022
2023 /**
2024 * zfcp_fsf_close_unit - close zfcp unit
2025 * @erp_action: pointer to struct zfcp_unit
2026 * Returns: 0 on success, error otherwise
2027 */
2028 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2029 {
2030 struct qdio_buffer_element *sbale;
2031 struct zfcp_adapter *adapter = erp_action->adapter;
2032 struct zfcp_fsf_req *req;
2033 int retval = -EIO;
2034
2035 spin_lock_bh(&adapter->req_q_lock);
2036 if (zfcp_fsf_req_sbal_get(adapter))
2037 goto out;
2038 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2039 ZFCP_REQ_AUTO_CLEANUP,
2040 adapter->pool.fsf_req_erp);
2041 if (IS_ERR(req)) {
2042 retval = PTR_ERR(req);
2043 goto out;
2044 }
2045
2046 sbale = zfcp_qdio_sbale_req(req);
2047 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2048 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2049
2050 req->qtcb->header.port_handle = erp_action->port->handle;
2051 req->qtcb->header.lun_handle = erp_action->unit->handle;
2052 req->handler = zfcp_fsf_close_unit_handler;
2053 req->data = erp_action->unit;
2054 req->erp_action = erp_action;
2055 erp_action->fsf_req = req;
2056
2057 zfcp_fsf_start_erp_timer(req);
2058 retval = zfcp_fsf_req_send(req);
2059 if (retval) {
2060 zfcp_fsf_req_free(req);
2061 erp_action->fsf_req = NULL;
2062 }
2063 out:
2064 spin_unlock_bh(&adapter->req_q_lock);
2065 return retval;
2066 }
2067
2068 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2069 {
2070 lat_rec->sum += lat;
2071 lat_rec->min = min(lat_rec->min, lat);
2072 lat_rec->max = max(lat_rec->max, lat);
2073 }
2074
2075 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2076 {
2077 struct fsf_qual_latency_info *lat_inf;
2078 struct latency_cont *lat;
2079 struct zfcp_unit *unit = req->unit;
2080
2081 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2082
2083 switch (req->qtcb->bottom.io.data_direction) {
2084 case FSF_DATADIR_READ:
2085 lat = &unit->latencies.read;
2086 break;
2087 case FSF_DATADIR_WRITE:
2088 lat = &unit->latencies.write;
2089 break;
2090 case FSF_DATADIR_CMND:
2091 lat = &unit->latencies.cmd;
2092 break;
2093 default:
2094 return;
2095 }
2096
2097 spin_lock(&unit->latencies.lock);
2098 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2099 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2100 lat->counter++;
2101 spin_unlock(&unit->latencies.lock);
2102 }
2103
2104 #ifdef CONFIG_BLK_DEV_IO_TRACE
2105 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2106 {
2107 struct fsf_qual_latency_info *lat_inf;
2108 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2109 struct request *req = scsi_cmnd->request;
2110 struct zfcp_blk_drv_data trace;
2111 int ticks = fsf_req->adapter->timer_ticks;
2112
2113 trace.flags = 0;
2114 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2115 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2116 trace.flags |= ZFCP_BLK_LAT_VALID;
2117 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2118 trace.channel_lat = lat_inf->channel_lat * ticks;
2119 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2120 }
2121 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2122 trace.flags |= ZFCP_BLK_REQ_ERROR;
2123 trace.inb_usage = fsf_req->qdio_inb_usage;
2124 trace.outb_usage = fsf_req->qdio_outb_usage;
2125
2126 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2127 }
2128 #else
2129 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2130 {
2131 }
2132 #endif
2133
2134 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2135 {
2136 struct scsi_cmnd *scpnt;
2137 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2138 &(req->qtcb->bottom.io.fcp_rsp);
2139 u32 sns_len;
2140 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2141 unsigned long flags;
2142
2143 read_lock_irqsave(&req->adapter->abort_lock, flags);
2144
2145 scpnt = req->data;
2146 if (unlikely(!scpnt)) {
2147 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2148 return;
2149 }
2150
2151 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2152 set_host_byte(scpnt, DID_SOFT_ERROR);
2153 goto skip_fsfstatus;
2154 }
2155
2156 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2157 set_host_byte(scpnt, DID_ERROR);
2158 goto skip_fsfstatus;
2159 }
2160
2161 set_msg_byte(scpnt, COMMAND_COMPLETE);
2162
2163 scpnt->result |= fcp_rsp_iu->scsi_status;
2164
2165 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2166 zfcp_fsf_req_latency(req);
2167
2168 zfcp_fsf_trace_latency(req);
2169
2170 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2171 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2172 set_host_byte(scpnt, DID_OK);
2173 else {
2174 set_host_byte(scpnt, DID_ERROR);
2175 goto skip_fsfstatus;
2176 }
2177 }
2178
2179 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2180 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2181 fcp_rsp_iu->fcp_rsp_len;
2182 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2183 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2184
2185 memcpy(scpnt->sense_buffer,
2186 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2187 }
2188
2189 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2190 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2191 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2192 scpnt->underflow)
2193 set_host_byte(scpnt, DID_ERROR);
2194 }
2195 skip_fsfstatus:
2196 if (scpnt->result != 0)
2197 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2198 else if (scpnt->retries > 0)
2199 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2200 else
2201 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2202
2203 scpnt->host_scribble = NULL;
2204 (scpnt->scsi_done) (scpnt);
2205 /*
2206 * We must hold this lock until scsi_done has been called.
2207 * Otherwise we may call scsi_done after abort regarding this
2208 * command has completed.
2209 * Note: scsi_done must not block!
2210 */
2211 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2212 }
2213
2214 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2215 {
2216 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2217 &(req->qtcb->bottom.io.fcp_rsp);
2218 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2219
2220 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2221 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2222 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2223 }
2224
2225
2226 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2227 {
2228 struct zfcp_unit *unit;
2229 struct fsf_qtcb_header *header = &req->qtcb->header;
2230
2231 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2232 unit = req->data;
2233 else
2234 unit = req->unit;
2235
2236 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2237 goto skip_fsfstatus;
2238
2239 switch (header->fsf_status) {
2240 case FSF_HANDLE_MISMATCH:
2241 case FSF_PORT_HANDLE_NOT_VALID:
2242 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2243 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2244 break;
2245 case FSF_FCPLUN_NOT_VALID:
2246 case FSF_LUN_HANDLE_NOT_VALID:
2247 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2248 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2249 break;
2250 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2251 zfcp_fsf_class_not_supp(req);
2252 break;
2253 case FSF_ACCESS_DENIED:
2254 zfcp_fsf_access_denied_unit(req, unit);
2255 break;
2256 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2257 dev_err(&req->adapter->ccw_device->dev,
2258 "Incorrect direction %d, unit 0x%016Lx on port "
2259 "0x%016Lx closed\n",
2260 req->qtcb->bottom.io.data_direction,
2261 (unsigned long long)unit->fcp_lun,
2262 (unsigned long long)unit->port->wwpn);
2263 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2264 req);
2265 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2266 break;
2267 case FSF_CMND_LENGTH_NOT_VALID:
2268 dev_err(&req->adapter->ccw_device->dev,
2269 "Incorrect CDB length %d, unit 0x%016Lx on "
2270 "port 0x%016Lx closed\n",
2271 req->qtcb->bottom.io.fcp_cmnd_length,
2272 (unsigned long long)unit->fcp_lun,
2273 (unsigned long long)unit->port->wwpn);
2274 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2275 req);
2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2277 break;
2278 case FSF_PORT_BOXED:
2279 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2280 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2281 ZFCP_STATUS_FSFREQ_RETRY;
2282 break;
2283 case FSF_LUN_BOXED:
2284 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2285 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2286 ZFCP_STATUS_FSFREQ_RETRY;
2287 break;
2288 case FSF_ADAPTER_STATUS_AVAILABLE:
2289 if (header->fsf_status_qual.word[0] ==
2290 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2291 zfcp_test_link(unit->port);
2292 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2293 break;
2294 }
2295 skip_fsfstatus:
2296 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2297 zfcp_fsf_send_fcp_ctm_handler(req);
2298 else {
2299 zfcp_fsf_send_fcp_command_task_handler(req);
2300 req->unit = NULL;
2301 zfcp_unit_put(unit);
2302 }
2303 }
2304
2305 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2306 {
2307 u32 *fcp_dl_ptr;
2308
2309 /*
2310 * fcp_dl_addr = start address of fcp_cmnd structure +
2311 * size of fixed part + size of dynamically sized add_dcp_cdb field
2312 * SEE FCP-2 documentation
2313 */
2314 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2315 (fcp_cmd->add_fcp_cdb_length << 2));
2316 *fcp_dl_ptr = fcp_dl;
2317 }
2318
2319 /**
2320 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2321 * @unit: unit where command is sent to
2322 * @scsi_cmnd: scsi command to be sent
2323 */
2324 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2325 struct scsi_cmnd *scsi_cmnd)
2326 {
2327 struct zfcp_fsf_req *req;
2328 struct fcp_cmnd_iu *fcp_cmnd_iu;
2329 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2330 int real_bytes, retval = -EIO;
2331 struct zfcp_adapter *adapter = unit->port->adapter;
2332
2333 if (unlikely(!(atomic_read(&unit->status) &
2334 ZFCP_STATUS_COMMON_UNBLOCKED)))
2335 return -EBUSY;
2336
2337 spin_lock(&adapter->req_q_lock);
2338 if (atomic_read(&adapter->req_q.count) <= 0) {
2339 atomic_inc(&adapter->qdio_outb_full);
2340 goto out;
2341 }
2342 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2343 ZFCP_REQ_AUTO_CLEANUP,
2344 adapter->pool.fsf_req_scsi);
2345 if (IS_ERR(req)) {
2346 retval = PTR_ERR(req);
2347 goto out;
2348 }
2349
2350 zfcp_unit_get(unit);
2351 req->unit = unit;
2352 req->data = scsi_cmnd;
2353 req->handler = zfcp_fsf_send_fcp_command_handler;
2354 req->qtcb->header.lun_handle = unit->handle;
2355 req->qtcb->header.port_handle = unit->port->handle;
2356 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2357
2358 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2359
2360 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2361 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2362 /*
2363 * set depending on data direction:
2364 * data direction bits in SBALE (SB Type)
2365 * data direction bits in QTCB
2366 * data direction bits in FCP_CMND IU
2367 */
2368 switch (scsi_cmnd->sc_data_direction) {
2369 case DMA_NONE:
2370 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2371 break;
2372 case DMA_FROM_DEVICE:
2373 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2374 fcp_cmnd_iu->rddata = 1;
2375 break;
2376 case DMA_TO_DEVICE:
2377 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2378 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2379 fcp_cmnd_iu->wddata = 1;
2380 break;
2381 case DMA_BIDIRECTIONAL:
2382 goto failed_scsi_cmnd;
2383 }
2384
2385 if (likely((scsi_cmnd->device->simple_tags) ||
2386 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2387 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2388 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2389 else
2390 fcp_cmnd_iu->task_attribute = UNTAGGED;
2391
2392 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2393 fcp_cmnd_iu->add_fcp_cdb_length =
2394 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2395
2396 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2397
2398 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2399 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2400
2401 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2402 scsi_sglist(scsi_cmnd),
2403 FSF_MAX_SBALS_PER_REQ);
2404 if (unlikely(real_bytes < 0)) {
2405 if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2406 dev_err(&adapter->ccw_device->dev,
2407 "Oversize data package, unit 0x%016Lx "
2408 "on port 0x%016Lx closed\n",
2409 (unsigned long long)unit->fcp_lun,
2410 (unsigned long long)unit->port->wwpn);
2411 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2412 retval = -EINVAL;
2413 }
2414 goto failed_scsi_cmnd;
2415 }
2416
2417 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2418
2419 retval = zfcp_fsf_req_send(req);
2420 if (unlikely(retval))
2421 goto failed_scsi_cmnd;
2422
2423 goto out;
2424
2425 failed_scsi_cmnd:
2426 zfcp_unit_put(unit);
2427 zfcp_fsf_req_free(req);
2428 scsi_cmnd->host_scribble = NULL;
2429 out:
2430 spin_unlock(&adapter->req_q_lock);
2431 return retval;
2432 }
2433
2434 /**
2435 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2436 * @unit: pointer to struct zfcp_unit
2437 * @tm_flags: unsigned byte for task management flags
2438 * Returns: on success pointer to struct fsf_req, NULL otherwise
2439 */
2440 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2441 {
2442 struct qdio_buffer_element *sbale;
2443 struct zfcp_fsf_req *req = NULL;
2444 struct fcp_cmnd_iu *fcp_cmnd_iu;
2445 struct zfcp_adapter *adapter = unit->port->adapter;
2446
2447 if (unlikely(!(atomic_read(&unit->status) &
2448 ZFCP_STATUS_COMMON_UNBLOCKED)))
2449 return NULL;
2450
2451 spin_lock_bh(&adapter->req_q_lock);
2452 if (zfcp_fsf_req_sbal_get(adapter))
2453 goto out;
2454 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
2455 adapter->pool.fsf_req_scsi);
2456 if (IS_ERR(req)) {
2457 req = NULL;
2458 goto out;
2459 }
2460
2461 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2462 req->data = unit;
2463 req->handler = zfcp_fsf_send_fcp_command_handler;
2464 req->qtcb->header.lun_handle = unit->handle;
2465 req->qtcb->header.port_handle = unit->port->handle;
2466 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2467 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2468 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2469 sizeof(u32);
2470
2471 sbale = zfcp_qdio_sbale_req(req);
2472 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2473 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2474
2475 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2476 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2477 fcp_cmnd_iu->task_management_flags = tm_flags;
2478
2479 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2480 if (!zfcp_fsf_req_send(req))
2481 goto out;
2482
2483 zfcp_fsf_req_free(req);
2484 req = NULL;
2485 out:
2486 spin_unlock_bh(&adapter->req_q_lock);
2487 return req;
2488 }
2489
2490 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2491 {
2492 }
2493
2494 /**
2495 * zfcp_fsf_control_file - control file upload/download
2496 * @adapter: pointer to struct zfcp_adapter
2497 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2498 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2499 */
2500 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2501 struct zfcp_fsf_cfdc *fsf_cfdc)
2502 {
2503 struct qdio_buffer_element *sbale;
2504 struct zfcp_fsf_req *req = NULL;
2505 struct fsf_qtcb_bottom_support *bottom;
2506 int direction, retval = -EIO, bytes;
2507
2508 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2509 return ERR_PTR(-EOPNOTSUPP);
2510
2511 switch (fsf_cfdc->command) {
2512 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2513 direction = SBAL_FLAGS0_TYPE_WRITE;
2514 break;
2515 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2516 direction = SBAL_FLAGS0_TYPE_READ;
2517 break;
2518 default:
2519 return ERR_PTR(-EINVAL);
2520 }
2521
2522 spin_lock_bh(&adapter->req_q_lock);
2523 if (zfcp_fsf_req_sbal_get(adapter))
2524 goto out;
2525
2526 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2527 if (IS_ERR(req)) {
2528 retval = -EPERM;
2529 goto out;
2530 }
2531
2532 req->handler = zfcp_fsf_control_file_handler;
2533
2534 sbale = zfcp_qdio_sbale_req(req);
2535 sbale[0].flags |= direction;
2536
2537 bottom = &req->qtcb->bottom.support;
2538 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2539 bottom->option = fsf_cfdc->option;
2540
2541 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2542 FSF_MAX_SBALS_PER_REQ);
2543 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2544 retval = -ENOMEM;
2545 zfcp_fsf_req_free(req);
2546 goto out;
2547 }
2548
2549 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2550 retval = zfcp_fsf_req_send(req);
2551 out:
2552 spin_unlock_bh(&adapter->req_q_lock);
2553
2554 if (!retval) {
2555 wait_event(req->completion_wq,
2556 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2557 return req;
2558 }
2559 return ERR_PTR(retval);
2560 }
connection oriented routing - ARCHIVE NO UPDATES HERE