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thinkpad-acpi: improve Kconfig help text
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
blob4e41baa0c141a7caa8bdfb79df41d531e70d3a78
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 #include "zfcp_dbf.h"
15
16 static void zfcp_fsf_request_timeout_handler(unsigned long data)
17 {
18 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
19 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
20 "fsrth_1", NULL);
21 }
22
23 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
24 unsigned long timeout)
25 {
26 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
27 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
28 fsf_req->timer.expires = jiffies + timeout;
29 add_timer(&fsf_req->timer);
30 }
31
32 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
33 {
34 BUG_ON(!fsf_req->erp_action);
35 fsf_req->timer.function = zfcp_erp_timeout_handler;
36 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
37 fsf_req->timer.expires = jiffies + 30 * HZ;
38 add_timer(&fsf_req->timer);
39 }
40
41 /* association between FSF command and FSF QTCB type */
42 static u32 fsf_qtcb_type[] = {
43 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
44 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
53 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
54 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
56 };
57
58 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
59 {
60 u16 subtable = table >> 16;
61 u16 rule = table & 0xffff;
62 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
63
64 if (subtable && subtable < ARRAY_SIZE(act_type))
65 dev_warn(&adapter->ccw_device->dev,
66 "Access denied according to ACT rule type %s, "
67 "rule %d\n", act_type[subtable], rule);
68 }
69
70 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
71 struct zfcp_port *port)
72 {
73 struct fsf_qtcb_header *header = &req->qtcb->header;
74 dev_warn(&req->adapter->ccw_device->dev,
75 "Access denied to port 0x%016Lx\n",
76 (unsigned long long)port->wwpn);
77 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
78 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
79 zfcp_erp_port_access_denied(port, "fspad_1", req);
80 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
81 }
82
83 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
84 struct zfcp_unit *unit)
85 {
86 struct fsf_qtcb_header *header = &req->qtcb->header;
87 dev_warn(&req->adapter->ccw_device->dev,
88 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
89 (unsigned long long)unit->fcp_lun,
90 (unsigned long long)unit->port->wwpn);
91 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
92 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
93 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
94 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
95 }
96
97 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
98 {
99 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
100 "operational because of an unsupported FC class\n");
101 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
102 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
103 }
104
105 /**
106 * zfcp_fsf_req_free - free memory used by fsf request
107 * @fsf_req: pointer to struct zfcp_fsf_req
108 */
109 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
110 {
111 if (likely(req->pool)) {
112 if (likely(req->qtcb))
113 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
114 mempool_free(req, req->pool);
115 return;
116 }
117
118 if (likely(req->qtcb))
119 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
120 kfree(req);
121 }
122
123 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
124 {
125 struct fsf_status_read_buffer *sr_buf = req->data;
126 struct zfcp_adapter *adapter = req->adapter;
127 struct zfcp_port *port;
128 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
129 unsigned long flags;
130
131 read_lock_irqsave(&zfcp_data.config_lock, flags);
132 list_for_each_entry(port, &adapter->port_list_head, list)
133 if (port->d_id == d_id) {
134 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
135 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
136 return;
137 }
138 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
139 }
140
141 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
142 struct fsf_link_down_info *link_down)
143 {
144 struct zfcp_adapter *adapter = req->adapter;
145 unsigned long flags;
146
147 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
148 return;
149
150 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
151
152 read_lock_irqsave(&zfcp_data.config_lock, flags);
153 zfcp_scsi_schedule_rports_block(adapter);
154 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
155
156 if (!link_down)
157 goto out;
158
159 switch (link_down->error_code) {
160 case FSF_PSQ_LINK_NO_LIGHT:
161 dev_warn(&req->adapter->ccw_device->dev,
162 "There is no light signal from the local "
163 "fibre channel cable\n");
164 break;
165 case FSF_PSQ_LINK_WRAP_PLUG:
166 dev_warn(&req->adapter->ccw_device->dev,
167 "There is a wrap plug instead of a fibre "
168 "channel cable\n");
169 break;
170 case FSF_PSQ_LINK_NO_FCP:
171 dev_warn(&req->adapter->ccw_device->dev,
172 "The adjacent fibre channel node does not "
173 "support FCP\n");
174 break;
175 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
176 dev_warn(&req->adapter->ccw_device->dev,
177 "The FCP device is suspended because of a "
178 "firmware update\n");
179 break;
180 case FSF_PSQ_LINK_INVALID_WWPN:
181 dev_warn(&req->adapter->ccw_device->dev,
182 "The FCP device detected a WWPN that is "
183 "duplicate or not valid\n");
184 break;
185 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
186 dev_warn(&req->adapter->ccw_device->dev,
187 "The fibre channel fabric does not support NPIV\n");
188 break;
189 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
190 dev_warn(&req->adapter->ccw_device->dev,
191 "The FCP adapter cannot support more NPIV ports\n");
192 break;
193 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
194 dev_warn(&req->adapter->ccw_device->dev,
195 "The adjacent switch cannot support "
196 "more NPIV ports\n");
197 break;
198 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
199 dev_warn(&req->adapter->ccw_device->dev,
200 "The FCP adapter could not log in to the "
201 "fibre channel fabric\n");
202 break;
203 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
204 dev_warn(&req->adapter->ccw_device->dev,
205 "The WWPN assignment file on the FCP adapter "
206 "has been damaged\n");
207 break;
208 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
209 dev_warn(&req->adapter->ccw_device->dev,
210 "The mode table on the FCP adapter "
211 "has been damaged\n");
212 break;
213 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
214 dev_warn(&req->adapter->ccw_device->dev,
215 "All NPIV ports on the FCP adapter have "
216 "been assigned\n");
217 break;
218 default:
219 dev_warn(&req->adapter->ccw_device->dev,
220 "The link between the FCP adapter and "
221 "the FC fabric is down\n");
222 }
223 out:
224 zfcp_erp_adapter_failed(adapter, id, req);
225 }
226
227 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
228 {
229 struct fsf_status_read_buffer *sr_buf = req->data;
230 struct fsf_link_down_info *ldi =
231 (struct fsf_link_down_info *) &sr_buf->payload;
232
233 switch (sr_buf->status_subtype) {
234 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
235 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
236 break;
237 case FSF_STATUS_READ_SUB_FDISC_FAILED:
238 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
239 break;
240 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
241 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
242 };
243 }
244
245 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
246 {
247 struct zfcp_adapter *adapter = req->adapter;
248 struct fsf_status_read_buffer *sr_buf = req->data;
249
250 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
251 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
252 mempool_free(sr_buf, adapter->pool.status_read_data);
253 zfcp_fsf_req_free(req);
254 return;
255 }
256
257 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
258
259 switch (sr_buf->status_type) {
260 case FSF_STATUS_READ_PORT_CLOSED:
261 zfcp_fsf_status_read_port_closed(req);
262 break;
263 case FSF_STATUS_READ_INCOMING_ELS:
264 zfcp_fc_incoming_els(req);
265 break;
266 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
267 break;
268 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
269 dev_warn(&adapter->ccw_device->dev,
270 "The error threshold for checksum statistics "
271 "has been exceeded\n");
272 zfcp_dbf_hba_berr(adapter->dbf, req);
273 break;
274 case FSF_STATUS_READ_LINK_DOWN:
275 zfcp_fsf_status_read_link_down(req);
276 break;
277 case FSF_STATUS_READ_LINK_UP:
278 dev_info(&adapter->ccw_device->dev,
279 "The local link has been restored\n");
280 /* All ports should be marked as ready to run again */
281 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
282 ZFCP_STATUS_COMMON_RUNNING,
283 ZFCP_SET);
284 zfcp_erp_adapter_reopen(adapter,
285 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
286 ZFCP_STATUS_COMMON_ERP_FAILED,
287 "fssrh_2", req);
288 break;
289 case FSF_STATUS_READ_NOTIFICATION_LOST:
290 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
291 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
292 req);
293 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
294 schedule_work(&adapter->scan_work);
295 break;
296 case FSF_STATUS_READ_CFDC_UPDATED:
297 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
298 break;
299 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
300 adapter->adapter_features = sr_buf->payload.word[0];
301 break;
302 }
303
304 mempool_free(sr_buf, adapter->pool.status_read_data);
305 zfcp_fsf_req_free(req);
306
307 atomic_inc(&adapter->stat_miss);
308 queue_work(adapter->work_queue, &adapter->stat_work);
309 }
310
311 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
312 {
313 switch (req->qtcb->header.fsf_status_qual.word[0]) {
314 case FSF_SQ_FCP_RSP_AVAILABLE:
315 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
316 case FSF_SQ_NO_RETRY_POSSIBLE:
317 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
318 return;
319 case FSF_SQ_COMMAND_ABORTED:
320 req->status |= ZFCP_STATUS_FSFREQ_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 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
363 return;
364 }
365
366 switch (qtcb->prefix.prot_status) {
367 case FSF_PROT_GOOD:
368 case FSF_PROT_FSF_STATUS_PRESENTED:
369 return;
370 case FSF_PROT_QTCB_VERSION_ERROR:
371 dev_err(&adapter->ccw_device->dev,
372 "QTCB version 0x%x not supported by FCP adapter "
373 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
374 psq->word[0], psq->word[1]);
375 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
376 break;
377 case FSF_PROT_ERROR_STATE:
378 case FSF_PROT_SEQ_NUMB_ERROR:
379 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
380 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
381 break;
382 case FSF_PROT_UNSUPP_QTCB_TYPE:
383 dev_err(&adapter->ccw_device->dev,
384 "The QTCB type is not supported by the FCP adapter\n");
385 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
386 break;
387 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
388 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
389 &adapter->status);
390 break;
391 case FSF_PROT_DUPLICATE_REQUEST_ID:
392 dev_err(&adapter->ccw_device->dev,
393 "0x%Lx is an ambiguous request identifier\n",
394 (unsigned long long)qtcb->bottom.support.req_handle);
395 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
396 break;
397 case FSF_PROT_LINK_DOWN:
398 zfcp_fsf_link_down_info_eval(req, "fspse_5",
399 &psq->link_down_info);
400 /* FIXME: reopening adapter now? better wait for link up */
401 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
402 break;
403 case FSF_PROT_REEST_QUEUE:
404 /* All ports should be marked as ready to run again */
405 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
406 ZFCP_STATUS_COMMON_RUNNING,
407 ZFCP_SET);
408 zfcp_erp_adapter_reopen(adapter,
409 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
410 ZFCP_STATUS_COMMON_ERP_FAILED,
411 "fspse_8", req);
412 break;
413 default:
414 dev_err(&adapter->ccw_device->dev,
415 "0x%x is not a valid transfer protocol status\n",
416 qtcb->prefix.prot_status);
417 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
418 }
419 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
420 }
421
422 /**
423 * zfcp_fsf_req_complete - process completion of a FSF request
424 * @fsf_req: The FSF request that has been completed.
425 *
426 * When a request has been completed either from the FCP adapter,
427 * or it has been dismissed due to a queue shutdown, this function
428 * is called to process the completion status and trigger further
429 * events related to the FSF request.
430 */
431 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
432 {
433 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
434 zfcp_fsf_status_read_handler(req);
435 return;
436 }
437
438 del_timer(&req->timer);
439 zfcp_fsf_protstatus_eval(req);
440 zfcp_fsf_fsfstatus_eval(req);
441 req->handler(req);
442
443 if (req->erp_action)
444 zfcp_erp_notify(req->erp_action, 0);
445
446 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
447 zfcp_fsf_req_free(req);
448 else
449 complete(&req->completion);
450 }
451
452 /**
453 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
454 * @adapter: pointer to struct zfcp_adapter
455 *
456 * Never ever call this without shutting down the adapter first.
457 * Otherwise the adapter would continue using and corrupting s390 storage.
458 * Included BUG_ON() call to ensure this is done.
459 * ERP is supposed to be the only user of this function.
460 */
461 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
462 {
463 struct zfcp_fsf_req *req, *tmp;
464 unsigned long flags;
465 LIST_HEAD(remove_queue);
466 unsigned int i;
467
468 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
469 spin_lock_irqsave(&adapter->req_list_lock, flags);
470 for (i = 0; i < REQUEST_LIST_SIZE; i++)
471 list_splice_init(&adapter->req_list[i], &remove_queue);
472 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
473
474 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
475 list_del(&req->list);
476 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
477 zfcp_fsf_req_complete(req);
478 }
479 }
480
481 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
482 {
483 struct fsf_qtcb_bottom_config *bottom;
484 struct zfcp_adapter *adapter = req->adapter;
485 struct Scsi_Host *shost = adapter->scsi_host;
486
487 bottom = &req->qtcb->bottom.config;
488
489 if (req->data)
490 memcpy(req->data, bottom, sizeof(*bottom));
491
492 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
493 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
494 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
495 fc_host_speed(shost) = bottom->fc_link_speed;
496 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
497
498 adapter->hydra_version = bottom->adapter_type;
499 adapter->timer_ticks = bottom->timer_interval;
500
501 if (fc_host_permanent_port_name(shost) == -1)
502 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
503
504 switch (bottom->fc_topology) {
505 case FSF_TOPO_P2P:
506 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
507 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
508 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
509 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
510 break;
511 case FSF_TOPO_FABRIC:
512 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
513 break;
514 case FSF_TOPO_AL:
515 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
516 /* fall through */
517 default:
518 dev_err(&adapter->ccw_device->dev,
519 "Unknown or unsupported arbitrated loop "
520 "fibre channel topology detected\n");
521 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
522 return -EIO;
523 }
524
525 return 0;
526 }
527
528 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
529 {
530 struct zfcp_adapter *adapter = req->adapter;
531 struct fsf_qtcb *qtcb = req->qtcb;
532 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
533 struct Scsi_Host *shost = adapter->scsi_host;
534
535 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
536 return;
537
538 adapter->fsf_lic_version = bottom->lic_version;
539 adapter->adapter_features = bottom->adapter_features;
540 adapter->connection_features = bottom->connection_features;
541 adapter->peer_wwpn = 0;
542 adapter->peer_wwnn = 0;
543 adapter->peer_d_id = 0;
544
545 switch (qtcb->header.fsf_status) {
546 case FSF_GOOD:
547 if (zfcp_fsf_exchange_config_evaluate(req))
548 return;
549
550 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
551 dev_err(&adapter->ccw_device->dev,
552 "FCP adapter maximum QTCB size (%d bytes) "
553 "is too small\n",
554 bottom->max_qtcb_size);
555 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
556 return;
557 }
558 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
559 &adapter->status);
560 break;
561 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
562 fc_host_node_name(shost) = 0;
563 fc_host_port_name(shost) = 0;
564 fc_host_port_id(shost) = 0;
565 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
566 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
567 adapter->hydra_version = 0;
568
569 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
570 &adapter->status);
571
572 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
573 &qtcb->header.fsf_status_qual.link_down_info);
574 break;
575 default:
576 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
577 return;
578 }
579
580 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
581 adapter->hardware_version = bottom->hardware_version;
582 memcpy(fc_host_serial_number(shost), bottom->serial_number,
583 min(FC_SERIAL_NUMBER_SIZE, 17));
584 EBCASC(fc_host_serial_number(shost),
585 min(FC_SERIAL_NUMBER_SIZE, 17));
586 }
587
588 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
589 dev_err(&adapter->ccw_device->dev,
590 "The FCP adapter only supports newer "
591 "control block versions\n");
592 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
593 return;
594 }
595 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
596 dev_err(&adapter->ccw_device->dev,
597 "The FCP adapter only supports older "
598 "control block versions\n");
599 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
600 }
601 }
602
603 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
604 {
605 struct zfcp_adapter *adapter = req->adapter;
606 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
607 struct Scsi_Host *shost = adapter->scsi_host;
608
609 if (req->data)
610 memcpy(req->data, bottom, sizeof(*bottom));
611
612 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
613 fc_host_permanent_port_name(shost) = bottom->wwpn;
614 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
615 } else
616 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
617 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
618 fc_host_supported_speeds(shost) = bottom->supported_speed;
619 }
620
621 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
622 {
623 struct fsf_qtcb *qtcb = req->qtcb;
624
625 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
626 return;
627
628 switch (qtcb->header.fsf_status) {
629 case FSF_GOOD:
630 zfcp_fsf_exchange_port_evaluate(req);
631 break;
632 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
633 zfcp_fsf_exchange_port_evaluate(req);
634 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
635 &qtcb->header.fsf_status_qual.link_down_info);
636 break;
637 }
638 }
639
640 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
641 {
642 struct zfcp_qdio_queue *req_q = &qdio->req_q;
643
644 spin_lock_bh(&qdio->req_q_lock);
645 if (atomic_read(&req_q->count))
646 return 1;
647 spin_unlock_bh(&qdio->req_q_lock);
648 return 0;
649 }
650
651 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
652 {
653 struct zfcp_adapter *adapter = qdio->adapter;
654 long ret;
655
656 spin_unlock_bh(&qdio->req_q_lock);
657 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
658 zfcp_fsf_sbal_check(qdio), 5 * HZ);
659 if (ret > 0)
660 return 0;
661 if (!ret) {
662 atomic_inc(&qdio->req_q_full);
663 /* assume hanging outbound queue, try queue recovery */
664 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
665 }
666
667 spin_lock_bh(&qdio->req_q_lock);
668 return -EIO;
669 }
670
671 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
672 {
673 struct zfcp_fsf_req *req;
674
675 if (likely(pool))
676 req = mempool_alloc(pool, GFP_ATOMIC);
677 else
678 req = kmalloc(sizeof(*req), GFP_ATOMIC);
679
680 if (unlikely(!req))
681 return NULL;
682
683 memset(req, 0, sizeof(*req));
684 req->pool = pool;
685 return req;
686 }
687
688 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
689 {
690 struct fsf_qtcb *qtcb;
691
692 if (likely(pool))
693 qtcb = mempool_alloc(pool, GFP_ATOMIC);
694 else
695 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
696
697 if (unlikely(!qtcb))
698 return NULL;
699
700 memset(qtcb, 0, sizeof(*qtcb));
701 return qtcb;
702 }
703
704 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
705 u32 fsf_cmd, mempool_t *pool)
706 {
707 struct qdio_buffer_element *sbale;
708 struct zfcp_qdio_queue *req_q = &qdio->req_q;
709 struct zfcp_adapter *adapter = qdio->adapter;
710 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
711
712 if (unlikely(!req))
713 return ERR_PTR(-ENOMEM);
714
715 if (adapter->req_no == 0)
716 adapter->req_no++;
717
718 INIT_LIST_HEAD(&req->list);
719 init_timer(&req->timer);
720 init_completion(&req->completion);
721
722 req->adapter = adapter;
723 req->fsf_command = fsf_cmd;
724 req->req_id = adapter->req_no;
725 req->queue_req.sbal_number = 1;
726 req->queue_req.sbal_first = req_q->first;
727 req->queue_req.sbal_last = req_q->first;
728 req->queue_req.sbale_curr = 1;
729
730 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
731 sbale[0].addr = (void *) req->req_id;
732 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
733
734 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
735 if (likely(pool))
736 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
737 else
738 req->qtcb = zfcp_qtcb_alloc(NULL);
739
740 if (unlikely(!req->qtcb)) {
741 zfcp_fsf_req_free(req);
742 return ERR_PTR(-ENOMEM);
743 }
744
745 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
746 req->qtcb->prefix.req_id = req->req_id;
747 req->qtcb->prefix.ulp_info = 26;
748 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
749 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
750 req->qtcb->header.req_handle = req->req_id;
751 req->qtcb->header.fsf_command = req->fsf_command;
752 req->seq_no = adapter->fsf_req_seq_no;
753 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
754 sbale[1].addr = (void *) req->qtcb;
755 sbale[1].length = sizeof(struct fsf_qtcb);
756 }
757
758 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
759 zfcp_fsf_req_free(req);
760 return ERR_PTR(-EIO);
761 }
762
763 return req;
764 }
765
766 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767 {
768 struct zfcp_adapter *adapter = req->adapter;
769 struct zfcp_qdio *qdio = adapter->qdio;
770 unsigned long flags;
771 int idx;
772 int with_qtcb = (req->qtcb != NULL);
773
774 /* put allocated FSF request into hash table */
775 spin_lock_irqsave(&adapter->req_list_lock, flags);
776 idx = zfcp_reqlist_hash(req->req_id);
777 list_add_tail(&req->list, &adapter->req_list[idx]);
778 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
779
780 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
781 req->issued = get_clock();
782 if (zfcp_qdio_send(qdio, &req->queue_req)) {
783 del_timer(&req->timer);
784 spin_lock_irqsave(&adapter->req_list_lock, flags);
785 /* lookup request again, list might have changed */
786 if (zfcp_reqlist_find_safe(adapter, req))
787 zfcp_reqlist_remove(adapter, req);
788 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
789 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
790 return -EIO;
791 }
792
793 /* Don't increase for unsolicited status */
794 if (with_qtcb)
795 adapter->fsf_req_seq_no++;
796 adapter->req_no++;
797
798 return 0;
799 }
800
801 /**
802 * zfcp_fsf_status_read - send status read request
803 * @adapter: pointer to struct zfcp_adapter
804 * @req_flags: request flags
805 * Returns: 0 on success, ERROR otherwise
806 */
807 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
808 {
809 struct zfcp_adapter *adapter = qdio->adapter;
810 struct zfcp_fsf_req *req;
811 struct fsf_status_read_buffer *sr_buf;
812 struct qdio_buffer_element *sbale;
813 int retval = -EIO;
814
815 spin_lock_bh(&qdio->req_q_lock);
816 if (zfcp_fsf_req_sbal_get(qdio))
817 goto out;
818
819 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
820 adapter->pool.status_read_req);
821 if (IS_ERR(req)) {
822 retval = PTR_ERR(req);
823 goto out;
824 }
825
826 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->queue_req.sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
840
841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
844
845 goto out;
846
847 failed_req_send:
848 mempool_free(sr_buf, adapter->pool.status_read_data);
849 failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
852 out:
853 spin_unlock_bh(&qdio->req_q_lock);
854 return retval;
855 }
856
857 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858 {
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
866 case FSF_PORT_HANDLE_NOT_VALID:
867 if (fsq->word[0] == fsq->word[1]) {
868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
871 }
872 break;
873 case FSF_LUN_HANDLE_NOT_VALID:
874 if (fsq->word[0] == fsq->word[1]) {
875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
877 }
878 break;
879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
881 break;
882 case FSF_PORT_BOXED:
883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
886 break;
887 case FSF_LUN_BOXED:
888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
891 break;
892 case FSF_ADAPTER_STATUS_AVAILABLE:
893 switch (fsq->word[0]) {
894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
895 zfcp_fc_test_link(unit->port);
896 /* fall through */
897 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
898 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
899 break;
900 }
901 break;
902 case FSF_GOOD:
903 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
904 break;
905 }
906 }
907
908 /**
909 * zfcp_fsf_abort_fcp_command - abort running SCSI command
910 * @old_req_id: unsigned long
911 * @unit: pointer to struct zfcp_unit
912 * Returns: pointer to struct zfcp_fsf_req
913 */
914
915 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
916 struct zfcp_unit *unit)
917 {
918 struct qdio_buffer_element *sbale;
919 struct zfcp_fsf_req *req = NULL;
920 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
921
922 spin_lock_bh(&qdio->req_q_lock);
923 if (zfcp_fsf_req_sbal_get(qdio))
924 goto out;
925 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
926 qdio->adapter->pool.scsi_abort);
927 if (IS_ERR(req)) {
928 req = NULL;
929 goto out;
930 }
931
932 if (unlikely(!(atomic_read(&unit->status) &
933 ZFCP_STATUS_COMMON_UNBLOCKED)))
934 goto out_error_free;
935
936 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
937 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
938 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
939
940 req->data = unit;
941 req->handler = zfcp_fsf_abort_fcp_command_handler;
942 req->qtcb->header.lun_handle = unit->handle;
943 req->qtcb->header.port_handle = unit->port->handle;
944 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
945
946 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
947 if (!zfcp_fsf_req_send(req))
948 goto out;
949
950 out_error_free:
951 zfcp_fsf_req_free(req);
952 req = NULL;
953 out:
954 spin_unlock_bh(&qdio->req_q_lock);
955 return req;
956 }
957
958 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
959 {
960 struct zfcp_adapter *adapter = req->adapter;
961 struct zfcp_send_ct *send_ct = req->data;
962 struct fsf_qtcb_header *header = &req->qtcb->header;
963
964 send_ct->status = -EINVAL;
965
966 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
967 goto skip_fsfstatus;
968
969 switch (header->fsf_status) {
970 case FSF_GOOD:
971 zfcp_dbf_san_ct_response(req);
972 send_ct->status = 0;
973 break;
974 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
975 zfcp_fsf_class_not_supp(req);
976 break;
977 case FSF_ADAPTER_STATUS_AVAILABLE:
978 switch (header->fsf_status_qual.word[0]){
979 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
980 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
981 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
982 break;
983 }
984 break;
985 case FSF_ACCESS_DENIED:
986 break;
987 case FSF_PORT_BOXED:
988 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
989 ZFCP_STATUS_FSFREQ_RETRY;
990 break;
991 case FSF_PORT_HANDLE_NOT_VALID:
992 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
993 /* fall through */
994 case FSF_GENERIC_COMMAND_REJECTED:
995 case FSF_PAYLOAD_SIZE_MISMATCH:
996 case FSF_REQUEST_SIZE_TOO_LARGE:
997 case FSF_RESPONSE_SIZE_TOO_LARGE:
998 case FSF_SBAL_MISMATCH:
999 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1000 break;
1001 }
1002
1003 skip_fsfstatus:
1004 if (send_ct->handler)
1005 send_ct->handler(send_ct->handler_data);
1006 }
1007
1008 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1009 struct scatterlist *sg_req,
1010 struct scatterlist *sg_resp)
1011 {
1012 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1013 sbale[2].addr = sg_virt(sg_req);
1014 sbale[2].length = sg_req->length;
1015 sbale[3].addr = sg_virt(sg_resp);
1016 sbale[3].length = sg_resp->length;
1017 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1018 }
1019
1020 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1021 {
1022 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1023 }
1024
1025 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1026 struct scatterlist *sg_req,
1027 struct scatterlist *sg_resp,
1028 int max_sbals)
1029 {
1030 struct zfcp_adapter *adapter = req->adapter;
1031 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1032 &req->queue_req);
1033 u32 feat = adapter->adapter_features;
1034 int bytes;
1035
1036 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1037 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1038 return -EOPNOTSUPP;
1039
1040 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041 return 0;
1042 }
1043
1044 /* use single, unchained SBAL if it can hold the request */
1045 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1046 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1047 return 0;
1048 }
1049
1050 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1051 SBAL_FLAGS0_TYPE_WRITE_READ,
1052 sg_req, max_sbals);
1053 if (bytes <= 0)
1054 return -EIO;
1055 req->qtcb->bottom.support.req_buf_length = bytes;
1056 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1057
1058 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1059 SBAL_FLAGS0_TYPE_WRITE_READ,
1060 sg_resp, max_sbals);
1061 req->qtcb->bottom.support.resp_buf_length = bytes;
1062 if (bytes <= 0)
1063 return -EIO;
1064
1065 return 0;
1066 }
1067
1068 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1069 struct scatterlist *sg_req,
1070 struct scatterlist *sg_resp,
1071 int max_sbals)
1072 {
1073 int ret;
1074
1075 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1076 if (ret)
1077 return ret;
1078
1079 /* common settings for ct/gs and els requests */
1080 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1081 req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
1082 zfcp_fsf_start_timer(req, (2 * R_A_TOV + 10) * HZ);
1083
1084 return 0;
1085 }
1086
1087 /**
1088 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1089 * @ct: pointer to struct zfcp_send_ct with data for request
1090 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1091 */
1092 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1093 {
1094 struct zfcp_wka_port *wka_port = ct->wka_port;
1095 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1096 struct zfcp_fsf_req *req;
1097 int ret = -EIO;
1098
1099 spin_lock_bh(&qdio->req_q_lock);
1100 if (zfcp_fsf_req_sbal_get(qdio))
1101 goto out;
1102
1103 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1104
1105 if (IS_ERR(req)) {
1106 ret = PTR_ERR(req);
1107 goto out;
1108 }
1109
1110 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1111 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1112 FSF_MAX_SBALS_PER_REQ);
1113 if (ret)
1114 goto failed_send;
1115
1116 req->handler = zfcp_fsf_send_ct_handler;
1117 req->qtcb->header.port_handle = wka_port->handle;
1118 req->data = ct;
1119
1120 zfcp_dbf_san_ct_request(req);
1121
1122 ret = zfcp_fsf_req_send(req);
1123 if (ret)
1124 goto failed_send;
1125
1126 goto out;
1127
1128 failed_send:
1129 zfcp_fsf_req_free(req);
1130 out:
1131 spin_unlock_bh(&qdio->req_q_lock);
1132 return ret;
1133 }
1134
1135 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1136 {
1137 struct zfcp_send_els *send_els = req->data;
1138 struct zfcp_port *port = send_els->port;
1139 struct fsf_qtcb_header *header = &req->qtcb->header;
1140
1141 send_els->status = -EINVAL;
1142
1143 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1144 goto skip_fsfstatus;
1145
1146 switch (header->fsf_status) {
1147 case FSF_GOOD:
1148 zfcp_dbf_san_els_response(req);
1149 send_els->status = 0;
1150 break;
1151 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1152 zfcp_fsf_class_not_supp(req);
1153 break;
1154 case FSF_ADAPTER_STATUS_AVAILABLE:
1155 switch (header->fsf_status_qual.word[0]){
1156 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1157 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1158 zfcp_fc_test_link(port);
1159 /*fall through */
1160 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1161 case FSF_SQ_RETRY_IF_POSSIBLE:
1162 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1163 break;
1164 }
1165 break;
1166 case FSF_ELS_COMMAND_REJECTED:
1167 case FSF_PAYLOAD_SIZE_MISMATCH:
1168 case FSF_REQUEST_SIZE_TOO_LARGE:
1169 case FSF_RESPONSE_SIZE_TOO_LARGE:
1170 break;
1171 case FSF_ACCESS_DENIED:
1172 if (port)
1173 zfcp_fsf_access_denied_port(req, port);
1174 break;
1175 case FSF_SBAL_MISMATCH:
1176 /* should never occure, avoided in zfcp_fsf_send_els */
1177 /* fall through */
1178 default:
1179 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1180 break;
1181 }
1182 skip_fsfstatus:
1183 if (send_els->handler)
1184 send_els->handler(send_els->handler_data);
1185 }
1186
1187 /**
1188 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1189 * @els: pointer to struct zfcp_send_els with data for the command
1190 */
1191 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1192 {
1193 struct zfcp_fsf_req *req;
1194 struct zfcp_qdio *qdio = els->adapter->qdio;
1195 int ret = -EIO;
1196
1197 spin_lock_bh(&qdio->req_q_lock);
1198 if (zfcp_fsf_req_sbal_get(qdio))
1199 goto out;
1200
1201 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1202
1203 if (IS_ERR(req)) {
1204 ret = PTR_ERR(req);
1205 goto out;
1206 }
1207
1208 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
1210
1211 if (ret)
1212 goto failed_send;
1213
1214 req->qtcb->bottom.support.d_id = els->d_id;
1215 req->handler = zfcp_fsf_send_els_handler;
1216 req->data = els;
1217
1218 zfcp_dbf_san_els_request(req);
1219
1220 ret = zfcp_fsf_req_send(req);
1221 if (ret)
1222 goto failed_send;
1223
1224 goto out;
1225
1226 failed_send:
1227 zfcp_fsf_req_free(req);
1228 out:
1229 spin_unlock_bh(&qdio->req_q_lock);
1230 return ret;
1231 }
1232
1233 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1234 {
1235 struct qdio_buffer_element *sbale;
1236 struct zfcp_fsf_req *req;
1237 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1238 int retval = -EIO;
1239
1240 spin_lock_bh(&qdio->req_q_lock);
1241 if (zfcp_fsf_req_sbal_get(qdio))
1242 goto out;
1243
1244 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245 qdio->adapter->pool.erp_req);
1246
1247 if (IS_ERR(req)) {
1248 retval = PTR_ERR(req);
1249 goto out;
1250 }
1251
1252 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1253 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1254 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1255 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1256
1257 req->qtcb->bottom.config.feature_selection =
1258 FSF_FEATURE_CFDC |
1259 FSF_FEATURE_LUN_SHARING |
1260 FSF_FEATURE_NOTIFICATION_LOST |
1261 FSF_FEATURE_UPDATE_ALERT;
1262 req->erp_action = erp_action;
1263 req->handler = zfcp_fsf_exchange_config_data_handler;
1264 erp_action->fsf_req = req;
1265
1266 zfcp_fsf_start_erp_timer(req);
1267 retval = zfcp_fsf_req_send(req);
1268 if (retval) {
1269 zfcp_fsf_req_free(req);
1270 erp_action->fsf_req = NULL;
1271 }
1272 out:
1273 spin_unlock_bh(&qdio->req_q_lock);
1274 return retval;
1275 }
1276
1277 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1278 struct fsf_qtcb_bottom_config *data)
1279 {
1280 struct qdio_buffer_element *sbale;
1281 struct zfcp_fsf_req *req = NULL;
1282 int retval = -EIO;
1283
1284 spin_lock_bh(&qdio->req_q_lock);
1285 if (zfcp_fsf_req_sbal_get(qdio))
1286 goto out_unlock;
1287
1288 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1289
1290 if (IS_ERR(req)) {
1291 retval = PTR_ERR(req);
1292 goto out_unlock;
1293 }
1294
1295 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1296 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1297 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1298 req->handler = zfcp_fsf_exchange_config_data_handler;
1299
1300 req->qtcb->bottom.config.feature_selection =
1301 FSF_FEATURE_CFDC |
1302 FSF_FEATURE_LUN_SHARING |
1303 FSF_FEATURE_NOTIFICATION_LOST |
1304 FSF_FEATURE_UPDATE_ALERT;
1305
1306 if (data)
1307 req->data = data;
1308
1309 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1310 retval = zfcp_fsf_req_send(req);
1311 spin_unlock_bh(&qdio->req_q_lock);
1312 if (!retval)
1313 wait_for_completion(&req->completion);
1314
1315 zfcp_fsf_req_free(req);
1316 return retval;
1317
1318 out_unlock:
1319 spin_unlock_bh(&qdio->req_q_lock);
1320 return retval;
1321 }
1322
1323 /**
1324 * zfcp_fsf_exchange_port_data - request information about local port
1325 * @erp_action: ERP action for the adapter for which port data is requested
1326 * Returns: 0 on success, error otherwise
1327 */
1328 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1329 {
1330 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1331 struct qdio_buffer_element *sbale;
1332 struct zfcp_fsf_req *req;
1333 int retval = -EIO;
1334
1335 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1336 return -EOPNOTSUPP;
1337
1338 spin_lock_bh(&qdio->req_q_lock);
1339 if (zfcp_fsf_req_sbal_get(qdio))
1340 goto out;
1341
1342 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1343 qdio->adapter->pool.erp_req);
1344
1345 if (IS_ERR(req)) {
1346 retval = PTR_ERR(req);
1347 goto out;
1348 }
1349
1350 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1351 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1352 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1353 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1354
1355 req->handler = zfcp_fsf_exchange_port_data_handler;
1356 req->erp_action = erp_action;
1357 erp_action->fsf_req = req;
1358
1359 zfcp_fsf_start_erp_timer(req);
1360 retval = zfcp_fsf_req_send(req);
1361 if (retval) {
1362 zfcp_fsf_req_free(req);
1363 erp_action->fsf_req = NULL;
1364 }
1365 out:
1366 spin_unlock_bh(&qdio->req_q_lock);
1367 return retval;
1368 }
1369
1370 /**
1371 * zfcp_fsf_exchange_port_data_sync - request information about local port
1372 * @qdio: pointer to struct zfcp_qdio
1373 * @data: pointer to struct fsf_qtcb_bottom_port
1374 * Returns: 0 on success, error otherwise
1375 */
1376 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1377 struct fsf_qtcb_bottom_port *data)
1378 {
1379 struct qdio_buffer_element *sbale;
1380 struct zfcp_fsf_req *req = NULL;
1381 int retval = -EIO;
1382
1383 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1384 return -EOPNOTSUPP;
1385
1386 spin_lock_bh(&qdio->req_q_lock);
1387 if (zfcp_fsf_req_sbal_get(qdio))
1388 goto out_unlock;
1389
1390 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1391
1392 if (IS_ERR(req)) {
1393 retval = PTR_ERR(req);
1394 goto out_unlock;
1395 }
1396
1397 if (data)
1398 req->data = data;
1399
1400 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1401 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1402 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1403
1404 req->handler = zfcp_fsf_exchange_port_data_handler;
1405 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1406 retval = zfcp_fsf_req_send(req);
1407 spin_unlock_bh(&qdio->req_q_lock);
1408
1409 if (!retval)
1410 wait_for_completion(&req->completion);
1411
1412 zfcp_fsf_req_free(req);
1413
1414 return retval;
1415
1416 out_unlock:
1417 spin_unlock_bh(&qdio->req_q_lock);
1418 return retval;
1419 }
1420
1421 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1422 {
1423 struct zfcp_port *port = req->data;
1424 struct fsf_qtcb_header *header = &req->qtcb->header;
1425 struct fsf_plogi *plogi;
1426
1427 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1428 goto out;
1429
1430 switch (header->fsf_status) {
1431 case FSF_PORT_ALREADY_OPEN:
1432 break;
1433 case FSF_ACCESS_DENIED:
1434 zfcp_fsf_access_denied_port(req, port);
1435 break;
1436 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1437 dev_warn(&req->adapter->ccw_device->dev,
1438 "Not enough FCP adapter resources to open "
1439 "remote port 0x%016Lx\n",
1440 (unsigned long long)port->wwpn);
1441 zfcp_erp_port_failed(port, "fsoph_1", req);
1442 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1443 break;
1444 case FSF_ADAPTER_STATUS_AVAILABLE:
1445 switch (header->fsf_status_qual.word[0]) {
1446 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1447 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1448 case FSF_SQ_NO_RETRY_POSSIBLE:
1449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1450 break;
1451 }
1452 break;
1453 case FSF_GOOD:
1454 port->handle = header->port_handle;
1455 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1456 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1457 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1458 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1459 &port->status);
1460 /* check whether D_ID has changed during open */
1461 /*
1462 * FIXME: This check is not airtight, as the FCP channel does
1463 * not monitor closures of target port connections caused on
1464 * the remote side. Thus, they might miss out on invalidating
1465 * locally cached WWPNs (and other N_Port parameters) of gone
1466 * target ports. So, our heroic attempt to make things safe
1467 * could be undermined by 'open port' response data tagged with
1468 * obsolete WWPNs. Another reason to monitor potential
1469 * connection closures ourself at least (by interpreting
1470 * incoming ELS' and unsolicited status). It just crosses my
1471 * mind that one should be able to cross-check by means of
1472 * another GID_PN straight after a port has been opened.
1473 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1474 */
1475 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1476 if (req->qtcb->bottom.support.els1_length >=
1477 FSF_PLOGI_MIN_LEN) {
1478 if (plogi->serv_param.wwpn != port->wwpn) {
1479 port->d_id = 0;
1480 dev_warn(&port->adapter->ccw_device->dev,
1481 "A port opened with WWPN 0x%016Lx "
1482 "returned data that identifies it as "
1483 "WWPN 0x%016Lx\n",
1484 (unsigned long long) port->wwpn,
1485 (unsigned long long)
1486 plogi->serv_param.wwpn);
1487 } else {
1488 port->wwnn = plogi->serv_param.wwnn;
1489 zfcp_fc_plogi_evaluate(port, plogi);
1490 }
1491 }
1492 break;
1493 case FSF_UNKNOWN_OP_SUBTYPE:
1494 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1495 break;
1496 }
1497
1498 out:
1499 zfcp_port_put(port);
1500 }
1501
1502 /**
1503 * zfcp_fsf_open_port - create and send open port request
1504 * @erp_action: pointer to struct zfcp_erp_action
1505 * Returns: 0 on success, error otherwise
1506 */
1507 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1508 {
1509 struct qdio_buffer_element *sbale;
1510 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1511 struct zfcp_port *port = erp_action->port;
1512 struct zfcp_fsf_req *req;
1513 int retval = -EIO;
1514
1515 spin_lock_bh(&qdio->req_q_lock);
1516 if (zfcp_fsf_req_sbal_get(qdio))
1517 goto out;
1518
1519 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1520 qdio->adapter->pool.erp_req);
1521
1522 if (IS_ERR(req)) {
1523 retval = PTR_ERR(req);
1524 goto out;
1525 }
1526
1527 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1528 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1529 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1530 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1531
1532 req->handler = zfcp_fsf_open_port_handler;
1533 req->qtcb->bottom.support.d_id = port->d_id;
1534 req->data = port;
1535 req->erp_action = erp_action;
1536 erp_action->fsf_req = req;
1537 zfcp_port_get(port);
1538
1539 zfcp_fsf_start_erp_timer(req);
1540 retval = zfcp_fsf_req_send(req);
1541 if (retval) {
1542 zfcp_fsf_req_free(req);
1543 erp_action->fsf_req = NULL;
1544 zfcp_port_put(port);
1545 }
1546 out:
1547 spin_unlock_bh(&qdio->req_q_lock);
1548 return retval;
1549 }
1550
1551 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1552 {
1553 struct zfcp_port *port = req->data;
1554
1555 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1556 return;
1557
1558 switch (req->qtcb->header.fsf_status) {
1559 case FSF_PORT_HANDLE_NOT_VALID:
1560 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1561 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1562 break;
1563 case FSF_ADAPTER_STATUS_AVAILABLE:
1564 break;
1565 case FSF_GOOD:
1566 zfcp_erp_modify_port_status(port, "fscph_2", req,
1567 ZFCP_STATUS_COMMON_OPEN,
1568 ZFCP_CLEAR);
1569 break;
1570 }
1571 }
1572
1573 /**
1574 * zfcp_fsf_close_port - create and send close port request
1575 * @erp_action: pointer to struct zfcp_erp_action
1576 * Returns: 0 on success, error otherwise
1577 */
1578 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1579 {
1580 struct qdio_buffer_element *sbale;
1581 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1582 struct zfcp_fsf_req *req;
1583 int retval = -EIO;
1584
1585 spin_lock_bh(&qdio->req_q_lock);
1586 if (zfcp_fsf_req_sbal_get(qdio))
1587 goto out;
1588
1589 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1590 qdio->adapter->pool.erp_req);
1591
1592 if (IS_ERR(req)) {
1593 retval = PTR_ERR(req);
1594 goto out;
1595 }
1596
1597 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1598 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1599 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1600 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1601
1602 req->handler = zfcp_fsf_close_port_handler;
1603 req->data = erp_action->port;
1604 req->erp_action = erp_action;
1605 req->qtcb->header.port_handle = erp_action->port->handle;
1606 erp_action->fsf_req = req;
1607
1608 zfcp_fsf_start_erp_timer(req);
1609 retval = zfcp_fsf_req_send(req);
1610 if (retval) {
1611 zfcp_fsf_req_free(req);
1612 erp_action->fsf_req = NULL;
1613 }
1614 out:
1615 spin_unlock_bh(&qdio->req_q_lock);
1616 return retval;
1617 }
1618
1619 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1620 {
1621 struct zfcp_wka_port *wka_port = req->data;
1622 struct fsf_qtcb_header *header = &req->qtcb->header;
1623
1624 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1625 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1626 goto out;
1627 }
1628
1629 switch (header->fsf_status) {
1630 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1631 dev_warn(&req->adapter->ccw_device->dev,
1632 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1633 /* fall through */
1634 case FSF_ADAPTER_STATUS_AVAILABLE:
1635 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1636 /* fall through */
1637 case FSF_ACCESS_DENIED:
1638 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1639 break;
1640 case FSF_GOOD:
1641 wka_port->handle = header->port_handle;
1642 /* fall through */
1643 case FSF_PORT_ALREADY_OPEN:
1644 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1645 }
1646 out:
1647 wake_up(&wka_port->completion_wq);
1648 }
1649
1650 /**
1651 * zfcp_fsf_open_wka_port - create and send open wka-port request
1652 * @wka_port: pointer to struct zfcp_wka_port
1653 * Returns: 0 on success, error otherwise
1654 */
1655 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1656 {
1657 struct qdio_buffer_element *sbale;
1658 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1659 struct zfcp_fsf_req *req;
1660 int retval = -EIO;
1661
1662 spin_lock_bh(&qdio->req_q_lock);
1663 if (zfcp_fsf_req_sbal_get(qdio))
1664 goto out;
1665
1666 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1667 qdio->adapter->pool.erp_req);
1668
1669 if (unlikely(IS_ERR(req))) {
1670 retval = PTR_ERR(req);
1671 goto out;
1672 }
1673
1674 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1675 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1676 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1677 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1678
1679 req->handler = zfcp_fsf_open_wka_port_handler;
1680 req->qtcb->bottom.support.d_id = wka_port->d_id;
1681 req->data = wka_port;
1682
1683 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1684 retval = zfcp_fsf_req_send(req);
1685 if (retval)
1686 zfcp_fsf_req_free(req);
1687 out:
1688 spin_unlock_bh(&qdio->req_q_lock);
1689 return retval;
1690 }
1691
1692 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1693 {
1694 struct zfcp_wka_port *wka_port = req->data;
1695
1696 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1697 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1698 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1699 }
1700
1701 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1702 wake_up(&wka_port->completion_wq);
1703 }
1704
1705 /**
1706 * zfcp_fsf_close_wka_port - create and send close wka port request
1707 * @erp_action: pointer to struct zfcp_erp_action
1708 * Returns: 0 on success, error otherwise
1709 */
1710 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1711 {
1712 struct qdio_buffer_element *sbale;
1713 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1714 struct zfcp_fsf_req *req;
1715 int retval = -EIO;
1716
1717 spin_lock_bh(&qdio->req_q_lock);
1718 if (zfcp_fsf_req_sbal_get(qdio))
1719 goto out;
1720
1721 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1722 qdio->adapter->pool.erp_req);
1723
1724 if (unlikely(IS_ERR(req))) {
1725 retval = PTR_ERR(req);
1726 goto out;
1727 }
1728
1729 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1730 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1731 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1732 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1733
1734 req->handler = zfcp_fsf_close_wka_port_handler;
1735 req->data = wka_port;
1736 req->qtcb->header.port_handle = wka_port->handle;
1737
1738 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1739 retval = zfcp_fsf_req_send(req);
1740 if (retval)
1741 zfcp_fsf_req_free(req);
1742 out:
1743 spin_unlock_bh(&qdio->req_q_lock);
1744 return retval;
1745 }
1746
1747 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1748 {
1749 struct zfcp_port *port = req->data;
1750 struct fsf_qtcb_header *header = &req->qtcb->header;
1751 struct zfcp_unit *unit;
1752
1753 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1754 return;
1755
1756 switch (header->fsf_status) {
1757 case FSF_PORT_HANDLE_NOT_VALID:
1758 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1759 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1760 break;
1761 case FSF_ACCESS_DENIED:
1762 zfcp_fsf_access_denied_port(req, port);
1763 break;
1764 case FSF_PORT_BOXED:
1765 /* can't use generic zfcp_erp_modify_port_status because
1766 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1767 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1768 list_for_each_entry(unit, &port->unit_list_head, list)
1769 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1770 &unit->status);
1771 zfcp_erp_port_boxed(port, "fscpph2", req);
1772 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1773 ZFCP_STATUS_FSFREQ_RETRY;
1774
1775 break;
1776 case FSF_ADAPTER_STATUS_AVAILABLE:
1777 switch (header->fsf_status_qual.word[0]) {
1778 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1779 /* fall through */
1780 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1781 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1782 break;
1783 }
1784 break;
1785 case FSF_GOOD:
1786 /* can't use generic zfcp_erp_modify_port_status because
1787 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1788 */
1789 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1790 list_for_each_entry(unit, &port->unit_list_head, list)
1791 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1792 &unit->status);
1793 break;
1794 }
1795 }
1796
1797 /**
1798 * zfcp_fsf_close_physical_port - close physical port
1799 * @erp_action: pointer to struct zfcp_erp_action
1800 * Returns: 0 on success
1801 */
1802 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1803 {
1804 struct qdio_buffer_element *sbale;
1805 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1806 struct zfcp_fsf_req *req;
1807 int retval = -EIO;
1808
1809 spin_lock_bh(&qdio->req_q_lock);
1810 if (zfcp_fsf_req_sbal_get(qdio))
1811 goto out;
1812
1813 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1814 qdio->adapter->pool.erp_req);
1815
1816 if (IS_ERR(req)) {
1817 retval = PTR_ERR(req);
1818 goto out;
1819 }
1820
1821 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1822 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1823 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1824 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1825
1826 req->data = erp_action->port;
1827 req->qtcb->header.port_handle = erp_action->port->handle;
1828 req->erp_action = erp_action;
1829 req->handler = zfcp_fsf_close_physical_port_handler;
1830 erp_action->fsf_req = req;
1831
1832 zfcp_fsf_start_erp_timer(req);
1833 retval = zfcp_fsf_req_send(req);
1834 if (retval) {
1835 zfcp_fsf_req_free(req);
1836 erp_action->fsf_req = NULL;
1837 }
1838 out:
1839 spin_unlock_bh(&qdio->req_q_lock);
1840 return retval;
1841 }
1842
1843 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1844 {
1845 struct zfcp_adapter *adapter = req->adapter;
1846 struct zfcp_unit *unit = req->data;
1847 struct fsf_qtcb_header *header = &req->qtcb->header;
1848 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1849 struct fsf_queue_designator *queue_designator =
1850 &header->fsf_status_qual.fsf_queue_designator;
1851 int exclusive, readwrite;
1852
1853 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1854 return;
1855
1856 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1857 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1858 ZFCP_STATUS_UNIT_SHARED |
1859 ZFCP_STATUS_UNIT_READONLY,
1860 &unit->status);
1861
1862 switch (header->fsf_status) {
1863
1864 case FSF_PORT_HANDLE_NOT_VALID:
1865 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1866 /* fall through */
1867 case FSF_LUN_ALREADY_OPEN:
1868 break;
1869 case FSF_ACCESS_DENIED:
1870 zfcp_fsf_access_denied_unit(req, unit);
1871 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1872 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1873 break;
1874 case FSF_PORT_BOXED:
1875 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1876 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1877 ZFCP_STATUS_FSFREQ_RETRY;
1878 break;
1879 case FSF_LUN_SHARING_VIOLATION:
1880 if (header->fsf_status_qual.word[0])
1881 dev_warn(&adapter->ccw_device->dev,
1882 "LUN 0x%Lx on port 0x%Lx is already in "
1883 "use by CSS%d, MIF Image ID %x\n",
1884 (unsigned long long)unit->fcp_lun,
1885 (unsigned long long)unit->port->wwpn,
1886 queue_designator->cssid,
1887 queue_designator->hla);
1888 else
1889 zfcp_act_eval_err(adapter,
1890 header->fsf_status_qual.word[2]);
1891 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1892 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1893 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1894 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1895 break;
1896 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1897 dev_warn(&adapter->ccw_device->dev,
1898 "No handle is available for LUN "
1899 "0x%016Lx on port 0x%016Lx\n",
1900 (unsigned long long)unit->fcp_lun,
1901 (unsigned long long)unit->port->wwpn);
1902 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1903 /* fall through */
1904 case FSF_INVALID_COMMAND_OPTION:
1905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1906 break;
1907 case FSF_ADAPTER_STATUS_AVAILABLE:
1908 switch (header->fsf_status_qual.word[0]) {
1909 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1910 zfcp_fc_test_link(unit->port);
1911 /* fall through */
1912 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1913 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1914 break;
1915 }
1916 break;
1917
1918 case FSF_GOOD:
1919 unit->handle = header->lun_handle;
1920 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1921
1922 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1923 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1924 !zfcp_ccw_priv_sch(adapter)) {
1925 exclusive = (bottom->lun_access_info &
1926 FSF_UNIT_ACCESS_EXCLUSIVE);
1927 readwrite = (bottom->lun_access_info &
1928 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1929
1930 if (!exclusive)
1931 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1932 &unit->status);
1933
1934 if (!readwrite) {
1935 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1936 &unit->status);
1937 dev_info(&adapter->ccw_device->dev,
1938 "SCSI device at LUN 0x%016Lx on port "
1939 "0x%016Lx opened read-only\n",
1940 (unsigned long long)unit->fcp_lun,
1941 (unsigned long long)unit->port->wwpn);
1942 }
1943
1944 if (exclusive && !readwrite) {
1945 dev_err(&adapter->ccw_device->dev,
1946 "Exclusive read-only access not "
1947 "supported (unit 0x%016Lx, "
1948 "port 0x%016Lx)\n",
1949 (unsigned long long)unit->fcp_lun,
1950 (unsigned long long)unit->port->wwpn);
1951 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1952 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1953 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1954 } else if (!exclusive && readwrite) {
1955 dev_err(&adapter->ccw_device->dev,
1956 "Shared read-write access not "
1957 "supported (unit 0x%016Lx, port "
1958 "0x%016Lx)\n",
1959 (unsigned long long)unit->fcp_lun,
1960 (unsigned long long)unit->port->wwpn);
1961 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1962 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1963 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1964 }
1965 }
1966 break;
1967 }
1968 }
1969
1970 /**
1971 * zfcp_fsf_open_unit - open unit
1972 * @erp_action: pointer to struct zfcp_erp_action
1973 * Returns: 0 on success, error otherwise
1974 */
1975 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1976 {
1977 struct qdio_buffer_element *sbale;
1978 struct zfcp_adapter *adapter = erp_action->adapter;
1979 struct zfcp_qdio *qdio = adapter->qdio;
1980 struct zfcp_fsf_req *req;
1981 int retval = -EIO;
1982
1983 spin_lock_bh(&qdio->req_q_lock);
1984 if (zfcp_fsf_req_sbal_get(qdio))
1985 goto out;
1986
1987 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1988 adapter->pool.erp_req);
1989
1990 if (IS_ERR(req)) {
1991 retval = PTR_ERR(req);
1992 goto out;
1993 }
1994
1995 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1996 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1997 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1998 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1999
2000 req->qtcb->header.port_handle = erp_action->port->handle;
2001 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
2002 req->handler = zfcp_fsf_open_unit_handler;
2003 req->data = erp_action->unit;
2004 req->erp_action = erp_action;
2005 erp_action->fsf_req = req;
2006
2007 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2008 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2009
2010 zfcp_fsf_start_erp_timer(req);
2011 retval = zfcp_fsf_req_send(req);
2012 if (retval) {
2013 zfcp_fsf_req_free(req);
2014 erp_action->fsf_req = NULL;
2015 }
2016 out:
2017 spin_unlock_bh(&qdio->req_q_lock);
2018 return retval;
2019 }
2020
2021 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2022 {
2023 struct zfcp_unit *unit = req->data;
2024
2025 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2026 return;
2027
2028 switch (req->qtcb->header.fsf_status) {
2029 case FSF_PORT_HANDLE_NOT_VALID:
2030 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2032 break;
2033 case FSF_LUN_HANDLE_NOT_VALID:
2034 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2035 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2036 break;
2037 case FSF_PORT_BOXED:
2038 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2039 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2040 ZFCP_STATUS_FSFREQ_RETRY;
2041 break;
2042 case FSF_ADAPTER_STATUS_AVAILABLE:
2043 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2044 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2045 zfcp_fc_test_link(unit->port);
2046 /* fall through */
2047 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2048 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2049 break;
2050 }
2051 break;
2052 case FSF_GOOD:
2053 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2054 break;
2055 }
2056 }
2057
2058 /**
2059 * zfcp_fsf_close_unit - close zfcp unit
2060 * @erp_action: pointer to struct zfcp_unit
2061 * Returns: 0 on success, error otherwise
2062 */
2063 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2064 {
2065 struct qdio_buffer_element *sbale;
2066 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2067 struct zfcp_fsf_req *req;
2068 int retval = -EIO;
2069
2070 spin_lock_bh(&qdio->req_q_lock);
2071 if (zfcp_fsf_req_sbal_get(qdio))
2072 goto out;
2073
2074 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2075 qdio->adapter->pool.erp_req);
2076
2077 if (IS_ERR(req)) {
2078 retval = PTR_ERR(req);
2079 goto out;
2080 }
2081
2082 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2083 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2084 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2085 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2086
2087 req->qtcb->header.port_handle = erp_action->port->handle;
2088 req->qtcb->header.lun_handle = erp_action->unit->handle;
2089 req->handler = zfcp_fsf_close_unit_handler;
2090 req->data = erp_action->unit;
2091 req->erp_action = erp_action;
2092 erp_action->fsf_req = req;
2093
2094 zfcp_fsf_start_erp_timer(req);
2095 retval = zfcp_fsf_req_send(req);
2096 if (retval) {
2097 zfcp_fsf_req_free(req);
2098 erp_action->fsf_req = NULL;
2099 }
2100 out:
2101 spin_unlock_bh(&qdio->req_q_lock);
2102 return retval;
2103 }
2104
2105 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2106 {
2107 lat_rec->sum += lat;
2108 lat_rec->min = min(lat_rec->min, lat);
2109 lat_rec->max = max(lat_rec->max, lat);
2110 }
2111
2112 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2113 {
2114 struct fsf_qual_latency_info *lat_inf;
2115 struct latency_cont *lat;
2116 struct zfcp_unit *unit = req->unit;
2117
2118 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2119
2120 switch (req->qtcb->bottom.io.data_direction) {
2121 case FSF_DATADIR_READ:
2122 lat = &unit->latencies.read;
2123 break;
2124 case FSF_DATADIR_WRITE:
2125 lat = &unit->latencies.write;
2126 break;
2127 case FSF_DATADIR_CMND:
2128 lat = &unit->latencies.cmd;
2129 break;
2130 default:
2131 return;
2132 }
2133
2134 spin_lock(&unit->latencies.lock);
2135 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2136 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2137 lat->counter++;
2138 spin_unlock(&unit->latencies.lock);
2139 }
2140
2141 #ifdef CONFIG_BLK_DEV_IO_TRACE
2142 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2143 {
2144 struct fsf_qual_latency_info *lat_inf;
2145 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2146 struct request *req = scsi_cmnd->request;
2147 struct zfcp_blk_drv_data trace;
2148 int ticks = fsf_req->adapter->timer_ticks;
2149
2150 trace.flags = 0;
2151 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2152 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2153 trace.flags |= ZFCP_BLK_LAT_VALID;
2154 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2155 trace.channel_lat = lat_inf->channel_lat * ticks;
2156 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2157 }
2158 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2159 trace.flags |= ZFCP_BLK_REQ_ERROR;
2160 trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2161 trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
2162
2163 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2164 }
2165 #else
2166 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2167 {
2168 }
2169 #endif
2170
2171 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2172 {
2173 struct scsi_cmnd *scpnt;
2174 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2175 &(req->qtcb->bottom.io.fcp_rsp);
2176 u32 sns_len;
2177 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2178 unsigned long flags;
2179
2180 read_lock_irqsave(&req->adapter->abort_lock, flags);
2181
2182 scpnt = req->data;
2183 if (unlikely(!scpnt)) {
2184 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2185 return;
2186 }
2187
2188 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2189 set_host_byte(scpnt, DID_SOFT_ERROR);
2190 goto skip_fsfstatus;
2191 }
2192
2193 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2194 set_host_byte(scpnt, DID_ERROR);
2195 goto skip_fsfstatus;
2196 }
2197
2198 set_msg_byte(scpnt, COMMAND_COMPLETE);
2199
2200 scpnt->result |= fcp_rsp_iu->scsi_status;
2201
2202 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2203 zfcp_fsf_req_latency(req);
2204
2205 zfcp_fsf_trace_latency(req);
2206
2207 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2208 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2209 set_host_byte(scpnt, DID_OK);
2210 else {
2211 set_host_byte(scpnt, DID_ERROR);
2212 goto skip_fsfstatus;
2213 }
2214 }
2215
2216 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2217 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2218 fcp_rsp_iu->fcp_rsp_len;
2219 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2220 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2221
2222 memcpy(scpnt->sense_buffer,
2223 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2224 }
2225
2226 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2227 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2228 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2229 scpnt->underflow)
2230 set_host_byte(scpnt, DID_ERROR);
2231 }
2232 skip_fsfstatus:
2233 if (scpnt->result != 0)
2234 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2235 else if (scpnt->retries > 0)
2236 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2237 else
2238 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2239
2240 scpnt->host_scribble = NULL;
2241 (scpnt->scsi_done) (scpnt);
2242 /*
2243 * We must hold this lock until scsi_done has been called.
2244 * Otherwise we may call scsi_done after abort regarding this
2245 * command has completed.
2246 * Note: scsi_done must not block!
2247 */
2248 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2249 }
2250
2251 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2252 {
2253 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2254 &(req->qtcb->bottom.io.fcp_rsp);
2255 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2256
2257 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2258 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2259 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2260 }
2261
2262
2263 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2264 {
2265 struct zfcp_unit *unit;
2266 struct fsf_qtcb_header *header = &req->qtcb->header;
2267
2268 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2269 unit = req->data;
2270 else
2271 unit = req->unit;
2272
2273 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2274 goto skip_fsfstatus;
2275
2276 switch (header->fsf_status) {
2277 case FSF_HANDLE_MISMATCH:
2278 case FSF_PORT_HANDLE_NOT_VALID:
2279 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2280 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2281 break;
2282 case FSF_FCPLUN_NOT_VALID:
2283 case FSF_LUN_HANDLE_NOT_VALID:
2284 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2285 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2286 break;
2287 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2288 zfcp_fsf_class_not_supp(req);
2289 break;
2290 case FSF_ACCESS_DENIED:
2291 zfcp_fsf_access_denied_unit(req, unit);
2292 break;
2293 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2294 dev_err(&req->adapter->ccw_device->dev,
2295 "Incorrect direction %d, unit 0x%016Lx on port "
2296 "0x%016Lx closed\n",
2297 req->qtcb->bottom.io.data_direction,
2298 (unsigned long long)unit->fcp_lun,
2299 (unsigned long long)unit->port->wwpn);
2300 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2301 req);
2302 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2303 break;
2304 case FSF_CMND_LENGTH_NOT_VALID:
2305 dev_err(&req->adapter->ccw_device->dev,
2306 "Incorrect CDB length %d, unit 0x%016Lx on "
2307 "port 0x%016Lx closed\n",
2308 req->qtcb->bottom.io.fcp_cmnd_length,
2309 (unsigned long long)unit->fcp_lun,
2310 (unsigned long long)unit->port->wwpn);
2311 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2312 req);
2313 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2314 break;
2315 case FSF_PORT_BOXED:
2316 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2317 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2318 ZFCP_STATUS_FSFREQ_RETRY;
2319 break;
2320 case FSF_LUN_BOXED:
2321 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2322 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2323 ZFCP_STATUS_FSFREQ_RETRY;
2324 break;
2325 case FSF_ADAPTER_STATUS_AVAILABLE:
2326 if (header->fsf_status_qual.word[0] ==
2327 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2328 zfcp_fc_test_link(unit->port);
2329 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2330 break;
2331 }
2332 skip_fsfstatus:
2333 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2334 zfcp_fsf_send_fcp_ctm_handler(req);
2335 else {
2336 zfcp_fsf_send_fcp_command_task_handler(req);
2337 req->unit = NULL;
2338 zfcp_unit_put(unit);
2339 }
2340 }
2341
2342 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2343 {
2344 u32 *fcp_dl_ptr;
2345
2346 /*
2347 * fcp_dl_addr = start address of fcp_cmnd structure +
2348 * size of fixed part + size of dynamically sized add_dcp_cdb field
2349 * SEE FCP-2 documentation
2350 */
2351 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2352 (fcp_cmd->add_fcp_cdb_length << 2));
2353 *fcp_dl_ptr = fcp_dl;
2354 }
2355
2356 /**
2357 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2358 * @unit: unit where command is sent to
2359 * @scsi_cmnd: scsi command to be sent
2360 */
2361 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2362 struct scsi_cmnd *scsi_cmnd)
2363 {
2364 struct zfcp_fsf_req *req;
2365 struct fcp_cmnd_iu *fcp_cmnd_iu;
2366 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2367 int real_bytes, retval = -EIO;
2368 struct zfcp_adapter *adapter = unit->port->adapter;
2369 struct zfcp_qdio *qdio = adapter->qdio;
2370
2371 if (unlikely(!(atomic_read(&unit->status) &
2372 ZFCP_STATUS_COMMON_UNBLOCKED)))
2373 return -EBUSY;
2374
2375 spin_lock(&qdio->req_q_lock);
2376 if (atomic_read(&qdio->req_q.count) <= 0) {
2377 atomic_inc(&qdio->req_q_full);
2378 goto out;
2379 }
2380
2381 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2382 adapter->pool.scsi_req);
2383
2384 if (IS_ERR(req)) {
2385 retval = PTR_ERR(req);
2386 goto out;
2387 }
2388
2389 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2390 zfcp_unit_get(unit);
2391 req->unit = unit;
2392 req->data = scsi_cmnd;
2393 req->handler = zfcp_fsf_send_fcp_command_handler;
2394 req->qtcb->header.lun_handle = unit->handle;
2395 req->qtcb->header.port_handle = unit->port->handle;
2396 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2397
2398 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2399
2400 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2401 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2402 /*
2403 * set depending on data direction:
2404 * data direction bits in SBALE (SB Type)
2405 * data direction bits in QTCB
2406 * data direction bits in FCP_CMND IU
2407 */
2408 switch (scsi_cmnd->sc_data_direction) {
2409 case DMA_NONE:
2410 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2411 break;
2412 case DMA_FROM_DEVICE:
2413 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2414 fcp_cmnd_iu->rddata = 1;
2415 break;
2416 case DMA_TO_DEVICE:
2417 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2418 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2419 fcp_cmnd_iu->wddata = 1;
2420 break;
2421 case DMA_BIDIRECTIONAL:
2422 goto failed_scsi_cmnd;
2423 }
2424
2425 if (likely((scsi_cmnd->device->simple_tags) ||
2426 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2427 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2428 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2429 else
2430 fcp_cmnd_iu->task_attribute = UNTAGGED;
2431
2432 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2433 fcp_cmnd_iu->add_fcp_cdb_length =
2434 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2435
2436 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2437
2438 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2439 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2440
2441 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2442 scsi_sglist(scsi_cmnd),
2443 FSF_MAX_SBALS_PER_REQ);
2444 if (unlikely(real_bytes < 0)) {
2445 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2446 dev_err(&adapter->ccw_device->dev,
2447 "Oversize data package, unit 0x%016Lx "
2448 "on port 0x%016Lx closed\n",
2449 (unsigned long long)unit->fcp_lun,
2450 (unsigned long long)unit->port->wwpn);
2451 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2452 retval = -EINVAL;
2453 }
2454 goto failed_scsi_cmnd;
2455 }
2456
2457 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2458
2459 retval = zfcp_fsf_req_send(req);
2460 if (unlikely(retval))
2461 goto failed_scsi_cmnd;
2462
2463 goto out;
2464
2465 failed_scsi_cmnd:
2466 zfcp_unit_put(unit);
2467 zfcp_fsf_req_free(req);
2468 scsi_cmnd->host_scribble = NULL;
2469 out:
2470 spin_unlock(&qdio->req_q_lock);
2471 return retval;
2472 }
2473
2474 /**
2475 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2476 * @unit: pointer to struct zfcp_unit
2477 * @tm_flags: unsigned byte for task management flags
2478 * Returns: on success pointer to struct fsf_req, NULL otherwise
2479 */
2480 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2481 {
2482 struct qdio_buffer_element *sbale;
2483 struct zfcp_fsf_req *req = NULL;
2484 struct fcp_cmnd_iu *fcp_cmnd_iu;
2485 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2486
2487 if (unlikely(!(atomic_read(&unit->status) &
2488 ZFCP_STATUS_COMMON_UNBLOCKED)))
2489 return NULL;
2490
2491 spin_lock_bh(&qdio->req_q_lock);
2492 if (zfcp_fsf_req_sbal_get(qdio))
2493 goto out;
2494
2495 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2496 qdio->adapter->pool.scsi_req);
2497
2498 if (IS_ERR(req)) {
2499 req = NULL;
2500 goto out;
2501 }
2502
2503 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2504 req->data = unit;
2505 req->handler = zfcp_fsf_send_fcp_command_handler;
2506 req->qtcb->header.lun_handle = unit->handle;
2507 req->qtcb->header.port_handle = unit->port->handle;
2508 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2509 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2510 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2511 sizeof(u32);
2512
2513 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2514 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2515 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2516
2517 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2518 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2519 fcp_cmnd_iu->task_management_flags = tm_flags;
2520
2521 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2522 if (!zfcp_fsf_req_send(req))
2523 goto out;
2524
2525 zfcp_fsf_req_free(req);
2526 req = NULL;
2527 out:
2528 spin_unlock_bh(&qdio->req_q_lock);
2529 return req;
2530 }
2531
2532 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2533 {
2534 }
2535
2536 /**
2537 * zfcp_fsf_control_file - control file upload/download
2538 * @adapter: pointer to struct zfcp_adapter
2539 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2540 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2541 */
2542 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2543 struct zfcp_fsf_cfdc *fsf_cfdc)
2544 {
2545 struct qdio_buffer_element *sbale;
2546 struct zfcp_qdio *qdio = adapter->qdio;
2547 struct zfcp_fsf_req *req = NULL;
2548 struct fsf_qtcb_bottom_support *bottom;
2549 int direction, retval = -EIO, bytes;
2550
2551 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2552 return ERR_PTR(-EOPNOTSUPP);
2553
2554 switch (fsf_cfdc->command) {
2555 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2556 direction = SBAL_FLAGS0_TYPE_WRITE;
2557 break;
2558 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2559 direction = SBAL_FLAGS0_TYPE_READ;
2560 break;
2561 default:
2562 return ERR_PTR(-EINVAL);
2563 }
2564
2565 spin_lock_bh(&qdio->req_q_lock);
2566 if (zfcp_fsf_req_sbal_get(qdio))
2567 goto out;
2568
2569 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2570 if (IS_ERR(req)) {
2571 retval = -EPERM;
2572 goto out;
2573 }
2574
2575 req->handler = zfcp_fsf_control_file_handler;
2576
2577 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2578 sbale[0].flags |= direction;
2579
2580 bottom = &req->qtcb->bottom.support;
2581 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2582 bottom->option = fsf_cfdc->option;
2583
2584 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2585 direction, fsf_cfdc->sg,
2586 FSF_MAX_SBALS_PER_REQ);
2587 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2588 zfcp_fsf_req_free(req);
2589 goto out;
2590 }
2591
2592 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2593 retval = zfcp_fsf_req_send(req);
2594 out:
2595 spin_unlock_bh(&qdio->req_q_lock);
2596
2597 if (!retval) {
2598 wait_for_completion(&req->completion);
2599 return req;
2600 }
2601 return ERR_PTR(retval);
2602 }
2603
2604 /**
2605 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2606 * @adapter: pointer to struct zfcp_adapter
2607 * @sbal_idx: response queue index of SBAL to be processed
2608 */
2609 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2610 {
2611 struct zfcp_adapter *adapter = qdio->adapter;
2612 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2613 struct qdio_buffer_element *sbale;
2614 struct zfcp_fsf_req *fsf_req;
2615 unsigned long flags, req_id;
2616 int idx;
2617
2618 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2619
2620 sbale = &sbal->element[idx];
2621 req_id = (unsigned long) sbale->addr;
2622 spin_lock_irqsave(&adapter->req_list_lock, flags);
2623 fsf_req = zfcp_reqlist_find(adapter, req_id);
2624
2625 if (!fsf_req)
2626 /*
2627 * Unknown request means that we have potentially memory
2628 * corruption and must stop the machine immediately.
2629 */
2630 panic("error: unknown req_id (%lx) on adapter %s.\n",
2631 req_id, dev_name(&adapter->ccw_device->dev));
2632
2633 list_del(&fsf_req->list);
2634 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2635
2636 fsf_req->queue_req.sbal_response = sbal_idx;
2637 fsf_req->queue_req.qdio_inb_usage =
2638 atomic_read(&qdio->resp_q.count);
2639 zfcp_fsf_req_complete(fsf_req);
2640
2641 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2642 break;
2643 }
2644 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree