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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux/fpc-iii.git] / drivers / s390 / scsi / zfcp_fsf.c
blob9ac6a6e4a6047531d142b86256c8266e5c411dfc
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 2002, 2010
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <linux/slab.h>
14 #include <scsi/fc/fc_els.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17 #include "zfcp_dbf.h"
18 #include "zfcp_qdio.h"
19 #include "zfcp_reqlist.h"
20
21 static void zfcp_fsf_request_timeout_handler(unsigned long data)
22 {
23 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
24 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
25 "fsrth_1", NULL);
26 }
27
28 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
29 unsigned long timeout)
30 {
31 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
32 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
33 fsf_req->timer.expires = jiffies + timeout;
34 add_timer(&fsf_req->timer);
35 }
36
37 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
38 {
39 BUG_ON(!fsf_req->erp_action);
40 fsf_req->timer.function = zfcp_erp_timeout_handler;
41 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
42 fsf_req->timer.expires = jiffies + 30 * HZ;
43 add_timer(&fsf_req->timer);
44 }
45
46 /* association between FSF command and FSF QTCB type */
47 static u32 fsf_qtcb_type[] = {
48 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
49 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
56 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
58 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
59 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
61 };
62
63 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
64 {
65 u16 subtable = table >> 16;
66 u16 rule = table & 0xffff;
67 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
68
69 if (subtable && subtable < ARRAY_SIZE(act_type))
70 dev_warn(&adapter->ccw_device->dev,
71 "Access denied according to ACT rule type %s, "
72 "rule %d\n", act_type[subtable], rule);
73 }
74
75 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
76 struct zfcp_port *port)
77 {
78 struct fsf_qtcb_header *header = &req->qtcb->header;
79 dev_warn(&req->adapter->ccw_device->dev,
80 "Access denied to port 0x%016Lx\n",
81 (unsigned long long)port->wwpn);
82 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
83 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
84 zfcp_erp_port_access_denied(port, "fspad_1", req);
85 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
86 }
87
88 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
89 struct zfcp_unit *unit)
90 {
91 struct fsf_qtcb_header *header = &req->qtcb->header;
92 dev_warn(&req->adapter->ccw_device->dev,
93 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
94 (unsigned long long)unit->fcp_lun,
95 (unsigned long long)unit->port->wwpn);
96 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
97 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
98 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
99 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
100 }
101
102 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
103 {
104 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
105 "operational because of an unsupported FC class\n");
106 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
107 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
108 }
109
110 /**
111 * zfcp_fsf_req_free - free memory used by fsf request
112 * @fsf_req: pointer to struct zfcp_fsf_req
113 */
114 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
115 {
116 if (likely(req->pool)) {
117 if (likely(req->qtcb))
118 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
119 mempool_free(req, req->pool);
120 return;
121 }
122
123 if (likely(req->qtcb))
124 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
125 kfree(req);
126 }
127
128 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
129 {
130 unsigned long flags;
131 struct fsf_status_read_buffer *sr_buf = req->data;
132 struct zfcp_adapter *adapter = req->adapter;
133 struct zfcp_port *port;
134 int d_id = ntoh24(sr_buf->d_id);
135
136 read_lock_irqsave(&adapter->port_list_lock, flags);
137 list_for_each_entry(port, &adapter->port_list, list)
138 if (port->d_id == d_id) {
139 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
140 break;
141 }
142 read_unlock_irqrestore(&adapter->port_list_lock, flags);
143 }
144
145 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
146 struct fsf_link_down_info *link_down)
147 {
148 struct zfcp_adapter *adapter = req->adapter;
149
150 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
151 return;
152
153 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
154
155 zfcp_scsi_schedule_rports_block(adapter);
156
157 if (!link_down)
158 goto out;
159
160 switch (link_down->error_code) {
161 case FSF_PSQ_LINK_NO_LIGHT:
162 dev_warn(&req->adapter->ccw_device->dev,
163 "There is no light signal from the local "
164 "fibre channel cable\n");
165 break;
166 case FSF_PSQ_LINK_WRAP_PLUG:
167 dev_warn(&req->adapter->ccw_device->dev,
168 "There is a wrap plug instead of a fibre "
169 "channel cable\n");
170 break;
171 case FSF_PSQ_LINK_NO_FCP:
172 dev_warn(&req->adapter->ccw_device->dev,
173 "The adjacent fibre channel node does not "
174 "support FCP\n");
175 break;
176 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
177 dev_warn(&req->adapter->ccw_device->dev,
178 "The FCP device is suspended because of a "
179 "firmware update\n");
180 break;
181 case FSF_PSQ_LINK_INVALID_WWPN:
182 dev_warn(&req->adapter->ccw_device->dev,
183 "The FCP device detected a WWPN that is "
184 "duplicate or not valid\n");
185 break;
186 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
187 dev_warn(&req->adapter->ccw_device->dev,
188 "The fibre channel fabric does not support NPIV\n");
189 break;
190 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "The FCP adapter cannot support more NPIV ports\n");
193 break;
194 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
195 dev_warn(&req->adapter->ccw_device->dev,
196 "The adjacent switch cannot support "
197 "more NPIV ports\n");
198 break;
199 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
200 dev_warn(&req->adapter->ccw_device->dev,
201 "The FCP adapter could not log in to the "
202 "fibre channel fabric\n");
203 break;
204 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
205 dev_warn(&req->adapter->ccw_device->dev,
206 "The WWPN assignment file on the FCP adapter "
207 "has been damaged\n");
208 break;
209 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
210 dev_warn(&req->adapter->ccw_device->dev,
211 "The mode table on the FCP adapter "
212 "has been damaged\n");
213 break;
214 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
215 dev_warn(&req->adapter->ccw_device->dev,
216 "All NPIV ports on the FCP adapter have "
217 "been assigned\n");
218 break;
219 default:
220 dev_warn(&req->adapter->ccw_device->dev,
221 "The link between the FCP adapter and "
222 "the FC fabric is down\n");
223 }
224 out:
225 zfcp_erp_adapter_failed(adapter, id, req);
226 }
227
228 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
229 {
230 struct fsf_status_read_buffer *sr_buf = req->data;
231 struct fsf_link_down_info *ldi =
232 (struct fsf_link_down_info *) &sr_buf->payload;
233
234 switch (sr_buf->status_subtype) {
235 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
236 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
237 break;
238 case FSF_STATUS_READ_SUB_FDISC_FAILED:
239 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
240 break;
241 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
242 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
243 };
244 }
245
246 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
247 {
248 struct zfcp_adapter *adapter = req->adapter;
249 struct fsf_status_read_buffer *sr_buf = req->data;
250
251 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
252 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
253 mempool_free(sr_buf, adapter->pool.status_read_data);
254 zfcp_fsf_req_free(req);
255 return;
256 }
257
258 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
259
260 switch (sr_buf->status_type) {
261 case FSF_STATUS_READ_PORT_CLOSED:
262 zfcp_fsf_status_read_port_closed(req);
263 break;
264 case FSF_STATUS_READ_INCOMING_ELS:
265 zfcp_fc_incoming_els(req);
266 break;
267 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
268 break;
269 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
270 dev_warn(&adapter->ccw_device->dev,
271 "The error threshold for checksum statistics "
272 "has been exceeded\n");
273 zfcp_dbf_hba_berr(adapter->dbf, req);
274 break;
275 case FSF_STATUS_READ_LINK_DOWN:
276 zfcp_fsf_status_read_link_down(req);
277 break;
278 case FSF_STATUS_READ_LINK_UP:
279 dev_info(&adapter->ccw_device->dev,
280 "The local link has been restored\n");
281 /* All ports should be marked as ready to run again */
282 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
283 ZFCP_STATUS_COMMON_RUNNING,
284 ZFCP_SET);
285 zfcp_erp_adapter_reopen(adapter,
286 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
287 ZFCP_STATUS_COMMON_ERP_FAILED,
288 "fssrh_2", req);
289 break;
290 case FSF_STATUS_READ_NOTIFICATION_LOST:
291 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
292 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
293 req);
294 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
295 queue_work(adapter->work_queue, &adapter->scan_work);
296 break;
297 case FSF_STATUS_READ_CFDC_UPDATED:
298 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
299 break;
300 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
301 adapter->adapter_features = sr_buf->payload.word[0];
302 break;
303 }
304
305 mempool_free(sr_buf, adapter->pool.status_read_data);
306 zfcp_fsf_req_free(req);
307
308 atomic_inc(&adapter->stat_miss);
309 queue_work(adapter->work_queue, &adapter->stat_work);
310 }
311
312 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
313 {
314 switch (req->qtcb->header.fsf_status_qual.word[0]) {
315 case FSF_SQ_FCP_RSP_AVAILABLE:
316 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
317 case FSF_SQ_NO_RETRY_POSSIBLE:
318 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
319 return;
320 case FSF_SQ_COMMAND_ABORTED:
321 break;
322 case FSF_SQ_NO_RECOM:
323 dev_err(&req->adapter->ccw_device->dev,
324 "The FCP adapter reported a problem "
325 "that cannot be recovered\n");
326 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
327 break;
328 }
329 /* all non-return stats set FSFREQ_ERROR*/
330 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
331 }
332
333 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
334 {
335 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
336 return;
337
338 switch (req->qtcb->header.fsf_status) {
339 case FSF_UNKNOWN_COMMAND:
340 dev_err(&req->adapter->ccw_device->dev,
341 "The FCP adapter does not recognize the command 0x%x\n",
342 req->qtcb->header.fsf_command);
343 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
344 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
345 break;
346 case FSF_ADAPTER_STATUS_AVAILABLE:
347 zfcp_fsf_fsfstatus_qual_eval(req);
348 break;
349 }
350 }
351
352 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
353 {
354 struct zfcp_adapter *adapter = req->adapter;
355 struct fsf_qtcb *qtcb = req->qtcb;
356 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
357
358 zfcp_dbf_hba_fsf_response(req);
359
360 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
361 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
362 return;
363 }
364
365 switch (qtcb->prefix.prot_status) {
366 case FSF_PROT_GOOD:
367 case FSF_PROT_FSF_STATUS_PRESENTED:
368 return;
369 case FSF_PROT_QTCB_VERSION_ERROR:
370 dev_err(&adapter->ccw_device->dev,
371 "QTCB version 0x%x not supported by FCP adapter "
372 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
373 psq->word[0], psq->word[1]);
374 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
375 break;
376 case FSF_PROT_ERROR_STATE:
377 case FSF_PROT_SEQ_NUMB_ERROR:
378 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
379 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
380 break;
381 case FSF_PROT_UNSUPP_QTCB_TYPE:
382 dev_err(&adapter->ccw_device->dev,
383 "The QTCB type is not supported by the FCP adapter\n");
384 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
385 break;
386 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
387 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
388 &adapter->status);
389 break;
390 case FSF_PROT_DUPLICATE_REQUEST_ID:
391 dev_err(&adapter->ccw_device->dev,
392 "0x%Lx is an ambiguous request identifier\n",
393 (unsigned long long)qtcb->bottom.support.req_handle);
394 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
395 break;
396 case FSF_PROT_LINK_DOWN:
397 zfcp_fsf_link_down_info_eval(req, "fspse_5",
398 &psq->link_down_info);
399 /* go through reopen to flush pending requests */
400 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
401 break;
402 case FSF_PROT_REEST_QUEUE:
403 /* All ports should be marked as ready to run again */
404 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
405 ZFCP_STATUS_COMMON_RUNNING,
406 ZFCP_SET);
407 zfcp_erp_adapter_reopen(adapter,
408 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
409 ZFCP_STATUS_COMMON_ERP_FAILED,
410 "fspse_8", req);
411 break;
412 default:
413 dev_err(&adapter->ccw_device->dev,
414 "0x%x is not a valid transfer protocol status\n",
415 qtcb->prefix.prot_status);
416 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
417 }
418 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
419 }
420
421 /**
422 * zfcp_fsf_req_complete - process completion of a FSF request
423 * @fsf_req: The FSF request that has been completed.
424 *
425 * When a request has been completed either from the FCP adapter,
426 * or it has been dismissed due to a queue shutdown, this function
427 * is called to process the completion status and trigger further
428 * events related to the FSF request.
429 */
430 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
431 {
432 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
433 zfcp_fsf_status_read_handler(req);
434 return;
435 }
436
437 del_timer(&req->timer);
438 zfcp_fsf_protstatus_eval(req);
439 zfcp_fsf_fsfstatus_eval(req);
440 req->handler(req);
441
442 if (req->erp_action)
443 zfcp_erp_notify(req->erp_action, 0);
444
445 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
446 zfcp_fsf_req_free(req);
447 else
448 complete(&req->completion);
449 }
450
451 /**
452 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
453 * @adapter: pointer to struct zfcp_adapter
454 *
455 * Never ever call this without shutting down the adapter first.
456 * Otherwise the adapter would continue using and corrupting s390 storage.
457 * Included BUG_ON() call to ensure this is done.
458 * ERP is supposed to be the only user of this function.
459 */
460 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
461 {
462 struct zfcp_fsf_req *req, *tmp;
463 LIST_HEAD(remove_queue);
464
465 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
466 zfcp_reqlist_move(adapter->req_list, &remove_queue);
467
468 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
469 list_del(&req->list);
470 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
471 zfcp_fsf_req_complete(req);
472 }
473 }
474
475 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
476 {
477 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
478 struct zfcp_adapter *adapter = req->adapter;
479 struct Scsi_Host *shost = adapter->scsi_host;
480 struct fc_els_flogi *nsp, *plogi;
481
482 /* adjust pointers for missing command code */
483 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
484 - sizeof(u32));
485 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
486 - sizeof(u32));
487
488 if (req->data)
489 memcpy(req->data, bottom, sizeof(*bottom));
490
491 fc_host_port_name(shost) = nsp->fl_wwpn;
492 fc_host_node_name(shost) = nsp->fl_wwnn;
493 fc_host_port_id(shost) = ntoh24(bottom->s_id);
494 fc_host_speed(shost) = bottom->fc_link_speed;
495 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
496
497 adapter->hydra_version = bottom->adapter_type;
498 adapter->timer_ticks = bottom->timer_interval;
499 adapter->stat_read_buf_num = max(bottom->status_read_buf_num, (u16)16);
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 = ntoh24(bottom->peer_d_id);
507 adapter->peer_wwpn = plogi->fl_wwpn;
508 adapter->peer_wwnn = plogi->fl_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 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
620 FC_FC4_LIST_SIZE);
621 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
622 FC_FC4_LIST_SIZE);
623 }
624
625 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
626 {
627 struct fsf_qtcb *qtcb = req->qtcb;
628
629 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
630 return;
631
632 switch (qtcb->header.fsf_status) {
633 case FSF_GOOD:
634 zfcp_fsf_exchange_port_evaluate(req);
635 break;
636 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
637 zfcp_fsf_exchange_port_evaluate(req);
638 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
639 &qtcb->header.fsf_status_qual.link_down_info);
640 break;
641 }
642 }
643
644 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
645 {
646 struct zfcp_fsf_req *req;
647
648 if (likely(pool))
649 req = mempool_alloc(pool, GFP_ATOMIC);
650 else
651 req = kmalloc(sizeof(*req), GFP_ATOMIC);
652
653 if (unlikely(!req))
654 return NULL;
655
656 memset(req, 0, sizeof(*req));
657 req->pool = pool;
658 return req;
659 }
660
661 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
662 {
663 struct fsf_qtcb *qtcb;
664
665 if (likely(pool))
666 qtcb = mempool_alloc(pool, GFP_ATOMIC);
667 else
668 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
669
670 if (unlikely(!qtcb))
671 return NULL;
672
673 memset(qtcb, 0, sizeof(*qtcb));
674 return qtcb;
675 }
676
677 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
678 u32 fsf_cmd, u32 sbtype,
679 mempool_t *pool)
680 {
681 struct zfcp_adapter *adapter = qdio->adapter;
682 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
683
684 if (unlikely(!req))
685 return ERR_PTR(-ENOMEM);
686
687 if (adapter->req_no == 0)
688 adapter->req_no++;
689
690 INIT_LIST_HEAD(&req->list);
691 init_timer(&req->timer);
692 init_completion(&req->completion);
693
694 req->adapter = adapter;
695 req->fsf_command = fsf_cmd;
696 req->req_id = adapter->req_no;
697
698 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
699 if (likely(pool))
700 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
701 else
702 req->qtcb = zfcp_qtcb_alloc(NULL);
703
704 if (unlikely(!req->qtcb)) {
705 zfcp_fsf_req_free(req);
706 return ERR_PTR(-ENOMEM);
707 }
708
709 req->seq_no = adapter->fsf_req_seq_no;
710 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
711 req->qtcb->prefix.req_id = req->req_id;
712 req->qtcb->prefix.ulp_info = 26;
713 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
714 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
715 req->qtcb->header.req_handle = req->req_id;
716 req->qtcb->header.fsf_command = req->fsf_command;
717 }
718
719 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
720 req->qtcb, sizeof(struct fsf_qtcb));
721
722 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
723 zfcp_fsf_req_free(req);
724 return ERR_PTR(-EIO);
725 }
726
727 return req;
728 }
729
730 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
731 {
732 struct zfcp_adapter *adapter = req->adapter;
733 struct zfcp_qdio *qdio = adapter->qdio;
734 int with_qtcb = (req->qtcb != NULL);
735 int req_id = req->req_id;
736
737 zfcp_reqlist_add(adapter->req_list, req);
738
739 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
740 req->issued = get_clock();
741 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
742 del_timer(&req->timer);
743 /* lookup request again, list might have changed */
744 zfcp_reqlist_find_rm(adapter->req_list, req_id);
745 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
746 return -EIO;
747 }
748
749 /* Don't increase for unsolicited status */
750 if (with_qtcb)
751 adapter->fsf_req_seq_no++;
752 adapter->req_no++;
753
754 return 0;
755 }
756
757 /**
758 * zfcp_fsf_status_read - send status read request
759 * @adapter: pointer to struct zfcp_adapter
760 * @req_flags: request flags
761 * Returns: 0 on success, ERROR otherwise
762 */
763 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
764 {
765 struct zfcp_adapter *adapter = qdio->adapter;
766 struct zfcp_fsf_req *req;
767 struct fsf_status_read_buffer *sr_buf;
768 int retval = -EIO;
769
770 spin_lock_bh(&qdio->req_q_lock);
771 if (zfcp_qdio_sbal_get(qdio))
772 goto out;
773
774 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
775 adapter->pool.status_read_req);
776 if (IS_ERR(req)) {
777 retval = PTR_ERR(req);
778 goto out;
779 }
780
781 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
782 if (!sr_buf) {
783 retval = -ENOMEM;
784 goto failed_buf;
785 }
786 memset(sr_buf, 0, sizeof(*sr_buf));
787 req->data = sr_buf;
788
789 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
790 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
791
792 retval = zfcp_fsf_req_send(req);
793 if (retval)
794 goto failed_req_send;
795
796 goto out;
797
798 failed_req_send:
799 mempool_free(sr_buf, adapter->pool.status_read_data);
800 failed_buf:
801 zfcp_fsf_req_free(req);
802 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
803 out:
804 spin_unlock_bh(&qdio->req_q_lock);
805 return retval;
806 }
807
808 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
809 {
810 struct zfcp_unit *unit = req->data;
811 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
812
813 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
814 return;
815
816 switch (req->qtcb->header.fsf_status) {
817 case FSF_PORT_HANDLE_NOT_VALID:
818 if (fsq->word[0] == fsq->word[1]) {
819 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
820 "fsafch1", req);
821 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
822 }
823 break;
824 case FSF_LUN_HANDLE_NOT_VALID:
825 if (fsq->word[0] == fsq->word[1]) {
826 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
827 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
828 }
829 break;
830 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
831 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
832 break;
833 case FSF_PORT_BOXED:
834 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
835 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
836 break;
837 case FSF_LUN_BOXED:
838 zfcp_erp_unit_boxed(unit, "fsafch4", req);
839 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
840 break;
841 case FSF_ADAPTER_STATUS_AVAILABLE:
842 switch (fsq->word[0]) {
843 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
844 zfcp_fc_test_link(unit->port);
845 /* fall through */
846 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
847 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
848 break;
849 }
850 break;
851 case FSF_GOOD:
852 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
853 break;
854 }
855 }
856
857 /**
858 * zfcp_fsf_abort_fcp_command - abort running SCSI command
859 * @old_req_id: unsigned long
860 * @unit: pointer to struct zfcp_unit
861 * Returns: pointer to struct zfcp_fsf_req
862 */
863
864 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
865 struct zfcp_unit *unit)
866 {
867 struct zfcp_fsf_req *req = NULL;
868 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
869
870 spin_lock_bh(&qdio->req_q_lock);
871 if (zfcp_qdio_sbal_get(qdio))
872 goto out;
873 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
874 SBAL_FLAGS0_TYPE_READ,
875 qdio->adapter->pool.scsi_abort);
876 if (IS_ERR(req)) {
877 req = NULL;
878 goto out;
879 }
880
881 if (unlikely(!(atomic_read(&unit->status) &
882 ZFCP_STATUS_COMMON_UNBLOCKED)))
883 goto out_error_free;
884
885 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
886
887 req->data = unit;
888 req->handler = zfcp_fsf_abort_fcp_command_handler;
889 req->qtcb->header.lun_handle = unit->handle;
890 req->qtcb->header.port_handle = unit->port->handle;
891 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
892
893 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
894 if (!zfcp_fsf_req_send(req))
895 goto out;
896
897 out_error_free:
898 zfcp_fsf_req_free(req);
899 req = NULL;
900 out:
901 spin_unlock_bh(&qdio->req_q_lock);
902 return req;
903 }
904
905 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
906 {
907 struct zfcp_adapter *adapter = req->adapter;
908 struct zfcp_fsf_ct_els *ct = req->data;
909 struct fsf_qtcb_header *header = &req->qtcb->header;
910
911 ct->status = -EINVAL;
912
913 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
914 goto skip_fsfstatus;
915
916 switch (header->fsf_status) {
917 case FSF_GOOD:
918 zfcp_dbf_san_ct_response(req);
919 ct->status = 0;
920 break;
921 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
922 zfcp_fsf_class_not_supp(req);
923 break;
924 case FSF_ADAPTER_STATUS_AVAILABLE:
925 switch (header->fsf_status_qual.word[0]){
926 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
927 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
928 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
929 break;
930 }
931 break;
932 case FSF_ACCESS_DENIED:
933 break;
934 case FSF_PORT_BOXED:
935 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
936 break;
937 case FSF_PORT_HANDLE_NOT_VALID:
938 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
939 /* fall through */
940 case FSF_GENERIC_COMMAND_REJECTED:
941 case FSF_PAYLOAD_SIZE_MISMATCH:
942 case FSF_REQUEST_SIZE_TOO_LARGE:
943 case FSF_RESPONSE_SIZE_TOO_LARGE:
944 case FSF_SBAL_MISMATCH:
945 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
946 break;
947 }
948
949 skip_fsfstatus:
950 if (ct->handler)
951 ct->handler(ct->handler_data);
952 }
953
954 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
955 struct zfcp_qdio_req *q_req,
956 struct scatterlist *sg_req,
957 struct scatterlist *sg_resp)
958 {
959 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
960 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
961 zfcp_qdio_set_sbale_last(qdio, q_req);
962 }
963
964 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
965 struct scatterlist *sg_req,
966 struct scatterlist *sg_resp,
967 int max_sbals)
968 {
969 struct zfcp_adapter *adapter = req->adapter;
970 u32 feat = adapter->adapter_features;
971 int bytes;
972
973 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
974 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
975 !zfcp_qdio_sg_one_sbale(sg_resp))
976 return -EOPNOTSUPP;
977
978 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
979 sg_req, sg_resp);
980 return 0;
981 }
982
983 /* use single, unchained SBAL if it can hold the request */
984 if (zfcp_qdio_sg_one_sbale(sg_req) || zfcp_qdio_sg_one_sbale(sg_resp)) {
985 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
986 sg_req, sg_resp);
987 return 0;
988 }
989
990 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
991 sg_req, max_sbals);
992 if (bytes <= 0)
993 return -EIO;
994 req->qtcb->bottom.support.req_buf_length = bytes;
995 zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
996
997 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
998 sg_resp, max_sbals);
999 req->qtcb->bottom.support.resp_buf_length = bytes;
1000 if (bytes <= 0)
1001 return -EIO;
1002
1003 return 0;
1004 }
1005
1006 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1007 struct scatterlist *sg_req,
1008 struct scatterlist *sg_resp,
1009 int max_sbals, unsigned int timeout)
1010 {
1011 int ret;
1012
1013 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1014 if (ret)
1015 return ret;
1016
1017 /* common settings for ct/gs and els requests */
1018 if (timeout > 255)
1019 timeout = 255; /* max value accepted by hardware */
1020 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1021 req->qtcb->bottom.support.timeout = timeout;
1022 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1023
1024 return 0;
1025 }
1026
1027 /**
1028 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1029 * @ct: pointer to struct zfcp_send_ct with data for request
1030 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1031 */
1032 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1033 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1034 unsigned int timeout)
1035 {
1036 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1037 struct zfcp_fsf_req *req;
1038 int ret = -EIO;
1039
1040 spin_lock_bh(&qdio->req_q_lock);
1041 if (zfcp_qdio_sbal_get(qdio))
1042 goto out;
1043
1044 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1045 SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1046
1047 if (IS_ERR(req)) {
1048 ret = PTR_ERR(req);
1049 goto out;
1050 }
1051
1052 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1053 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1054 ZFCP_FSF_MAX_SBALS_PER_REQ, timeout);
1055 if (ret)
1056 goto failed_send;
1057
1058 req->handler = zfcp_fsf_send_ct_handler;
1059 req->qtcb->header.port_handle = wka_port->handle;
1060 req->data = ct;
1061
1062 zfcp_dbf_san_ct_request(req, wka_port->d_id);
1063
1064 ret = zfcp_fsf_req_send(req);
1065 if (ret)
1066 goto failed_send;
1067
1068 goto out;
1069
1070 failed_send:
1071 zfcp_fsf_req_free(req);
1072 out:
1073 spin_unlock_bh(&qdio->req_q_lock);
1074 return ret;
1075 }
1076
1077 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1078 {
1079 struct zfcp_fsf_ct_els *send_els = req->data;
1080 struct zfcp_port *port = send_els->port;
1081 struct fsf_qtcb_header *header = &req->qtcb->header;
1082
1083 send_els->status = -EINVAL;
1084
1085 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1086 goto skip_fsfstatus;
1087
1088 switch (header->fsf_status) {
1089 case FSF_GOOD:
1090 zfcp_dbf_san_els_response(req);
1091 send_els->status = 0;
1092 break;
1093 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1094 zfcp_fsf_class_not_supp(req);
1095 break;
1096 case FSF_ADAPTER_STATUS_AVAILABLE:
1097 switch (header->fsf_status_qual.word[0]){
1098 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1099 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1100 case FSF_SQ_RETRY_IF_POSSIBLE:
1101 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1102 break;
1103 }
1104 break;
1105 case FSF_ELS_COMMAND_REJECTED:
1106 case FSF_PAYLOAD_SIZE_MISMATCH:
1107 case FSF_REQUEST_SIZE_TOO_LARGE:
1108 case FSF_RESPONSE_SIZE_TOO_LARGE:
1109 break;
1110 case FSF_ACCESS_DENIED:
1111 if (port)
1112 zfcp_fsf_access_denied_port(req, port);
1113 break;
1114 case FSF_SBAL_MISMATCH:
1115 /* should never occure, avoided in zfcp_fsf_send_els */
1116 /* fall through */
1117 default:
1118 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1119 break;
1120 }
1121 skip_fsfstatus:
1122 if (send_els->handler)
1123 send_els->handler(send_els->handler_data);
1124 }
1125
1126 /**
1127 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1128 * @els: pointer to struct zfcp_send_els with data for the command
1129 */
1130 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1131 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1132 {
1133 struct zfcp_fsf_req *req;
1134 struct zfcp_qdio *qdio = adapter->qdio;
1135 int ret = -EIO;
1136
1137 spin_lock_bh(&qdio->req_q_lock);
1138 if (zfcp_qdio_sbal_get(qdio))
1139 goto out;
1140
1141 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1142 SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1143
1144 if (IS_ERR(req)) {
1145 ret = PTR_ERR(req);
1146 goto out;
1147 }
1148
1149 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1150 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout);
1151
1152 if (ret)
1153 goto failed_send;
1154
1155 hton24(req->qtcb->bottom.support.d_id, d_id);
1156 req->handler = zfcp_fsf_send_els_handler;
1157 req->data = els;
1158
1159 zfcp_dbf_san_els_request(req);
1160
1161 ret = zfcp_fsf_req_send(req);
1162 if (ret)
1163 goto failed_send;
1164
1165 goto out;
1166
1167 failed_send:
1168 zfcp_fsf_req_free(req);
1169 out:
1170 spin_unlock_bh(&qdio->req_q_lock);
1171 return ret;
1172 }
1173
1174 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1175 {
1176 struct zfcp_fsf_req *req;
1177 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1178 int retval = -EIO;
1179
1180 spin_lock_bh(&qdio->req_q_lock);
1181 if (zfcp_qdio_sbal_get(qdio))
1182 goto out;
1183
1184 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1185 SBAL_FLAGS0_TYPE_READ,
1186 qdio->adapter->pool.erp_req);
1187
1188 if (IS_ERR(req)) {
1189 retval = PTR_ERR(req);
1190 goto out;
1191 }
1192
1193 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1194 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1195
1196 req->qtcb->bottom.config.feature_selection =
1197 FSF_FEATURE_CFDC |
1198 FSF_FEATURE_LUN_SHARING |
1199 FSF_FEATURE_NOTIFICATION_LOST |
1200 FSF_FEATURE_UPDATE_ALERT;
1201 req->erp_action = erp_action;
1202 req->handler = zfcp_fsf_exchange_config_data_handler;
1203 erp_action->fsf_req_id = req->req_id;
1204
1205 zfcp_fsf_start_erp_timer(req);
1206 retval = zfcp_fsf_req_send(req);
1207 if (retval) {
1208 zfcp_fsf_req_free(req);
1209 erp_action->fsf_req_id = 0;
1210 }
1211 out:
1212 spin_unlock_bh(&qdio->req_q_lock);
1213 return retval;
1214 }
1215
1216 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1217 struct fsf_qtcb_bottom_config *data)
1218 {
1219 struct zfcp_fsf_req *req = NULL;
1220 int retval = -EIO;
1221
1222 spin_lock_bh(&qdio->req_q_lock);
1223 if (zfcp_qdio_sbal_get(qdio))
1224 goto out_unlock;
1225
1226 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1227 SBAL_FLAGS0_TYPE_READ, NULL);
1228
1229 if (IS_ERR(req)) {
1230 retval = PTR_ERR(req);
1231 goto out_unlock;
1232 }
1233
1234 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1235 req->handler = zfcp_fsf_exchange_config_data_handler;
1236
1237 req->qtcb->bottom.config.feature_selection =
1238 FSF_FEATURE_CFDC |
1239 FSF_FEATURE_LUN_SHARING |
1240 FSF_FEATURE_NOTIFICATION_LOST |
1241 FSF_FEATURE_UPDATE_ALERT;
1242
1243 if (data)
1244 req->data = data;
1245
1246 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1247 retval = zfcp_fsf_req_send(req);
1248 spin_unlock_bh(&qdio->req_q_lock);
1249 if (!retval)
1250 wait_for_completion(&req->completion);
1251
1252 zfcp_fsf_req_free(req);
1253 return retval;
1254
1255 out_unlock:
1256 spin_unlock_bh(&qdio->req_q_lock);
1257 return retval;
1258 }
1259
1260 /**
1261 * zfcp_fsf_exchange_port_data - request information about local port
1262 * @erp_action: ERP action for the adapter for which port data is requested
1263 * Returns: 0 on success, error otherwise
1264 */
1265 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1266 {
1267 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1268 struct zfcp_fsf_req *req;
1269 int retval = -EIO;
1270
1271 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1272 return -EOPNOTSUPP;
1273
1274 spin_lock_bh(&qdio->req_q_lock);
1275 if (zfcp_qdio_sbal_get(qdio))
1276 goto out;
1277
1278 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1279 SBAL_FLAGS0_TYPE_READ,
1280 qdio->adapter->pool.erp_req);
1281
1282 if (IS_ERR(req)) {
1283 retval = PTR_ERR(req);
1284 goto out;
1285 }
1286
1287 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1288 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1289
1290 req->handler = zfcp_fsf_exchange_port_data_handler;
1291 req->erp_action = erp_action;
1292 erp_action->fsf_req_id = req->req_id;
1293
1294 zfcp_fsf_start_erp_timer(req);
1295 retval = zfcp_fsf_req_send(req);
1296 if (retval) {
1297 zfcp_fsf_req_free(req);
1298 erp_action->fsf_req_id = 0;
1299 }
1300 out:
1301 spin_unlock_bh(&qdio->req_q_lock);
1302 return retval;
1303 }
1304
1305 /**
1306 * zfcp_fsf_exchange_port_data_sync - request information about local port
1307 * @qdio: pointer to struct zfcp_qdio
1308 * @data: pointer to struct fsf_qtcb_bottom_port
1309 * Returns: 0 on success, error otherwise
1310 */
1311 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1312 struct fsf_qtcb_bottom_port *data)
1313 {
1314 struct zfcp_fsf_req *req = NULL;
1315 int retval = -EIO;
1316
1317 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1318 return -EOPNOTSUPP;
1319
1320 spin_lock_bh(&qdio->req_q_lock);
1321 if (zfcp_qdio_sbal_get(qdio))
1322 goto out_unlock;
1323
1324 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1325 SBAL_FLAGS0_TYPE_READ, NULL);
1326
1327 if (IS_ERR(req)) {
1328 retval = PTR_ERR(req);
1329 goto out_unlock;
1330 }
1331
1332 if (data)
1333 req->data = data;
1334
1335 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1336
1337 req->handler = zfcp_fsf_exchange_port_data_handler;
1338 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1339 retval = zfcp_fsf_req_send(req);
1340 spin_unlock_bh(&qdio->req_q_lock);
1341
1342 if (!retval)
1343 wait_for_completion(&req->completion);
1344
1345 zfcp_fsf_req_free(req);
1346
1347 return retval;
1348
1349 out_unlock:
1350 spin_unlock_bh(&qdio->req_q_lock);
1351 return retval;
1352 }
1353
1354 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1355 {
1356 struct zfcp_port *port = req->data;
1357 struct fsf_qtcb_header *header = &req->qtcb->header;
1358 struct fc_els_flogi *plogi;
1359
1360 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1361 goto out;
1362
1363 switch (header->fsf_status) {
1364 case FSF_PORT_ALREADY_OPEN:
1365 break;
1366 case FSF_ACCESS_DENIED:
1367 zfcp_fsf_access_denied_port(req, port);
1368 break;
1369 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1370 dev_warn(&req->adapter->ccw_device->dev,
1371 "Not enough FCP adapter resources to open "
1372 "remote port 0x%016Lx\n",
1373 (unsigned long long)port->wwpn);
1374 zfcp_erp_port_failed(port, "fsoph_1", req);
1375 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1376 break;
1377 case FSF_ADAPTER_STATUS_AVAILABLE:
1378 switch (header->fsf_status_qual.word[0]) {
1379 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1380 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1381 case FSF_SQ_NO_RETRY_POSSIBLE:
1382 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1383 break;
1384 }
1385 break;
1386 case FSF_GOOD:
1387 port->handle = header->port_handle;
1388 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1389 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1390 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1391 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1392 &port->status);
1393 /* check whether D_ID has changed during open */
1394 /*
1395 * FIXME: This check is not airtight, as the FCP channel does
1396 * not monitor closures of target port connections caused on
1397 * the remote side. Thus, they might miss out on invalidating
1398 * locally cached WWPNs (and other N_Port parameters) of gone
1399 * target ports. So, our heroic attempt to make things safe
1400 * could be undermined by 'open port' response data tagged with
1401 * obsolete WWPNs. Another reason to monitor potential
1402 * connection closures ourself at least (by interpreting
1403 * incoming ELS' and unsolicited status). It just crosses my
1404 * mind that one should be able to cross-check by means of
1405 * another GID_PN straight after a port has been opened.
1406 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1407 */
1408 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1409 if (req->qtcb->bottom.support.els1_length >=
1410 FSF_PLOGI_MIN_LEN)
1411 zfcp_fc_plogi_evaluate(port, plogi);
1412 break;
1413 case FSF_UNKNOWN_OP_SUBTYPE:
1414 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1415 break;
1416 }
1417
1418 out:
1419 put_device(&port->dev);
1420 }
1421
1422 /**
1423 * zfcp_fsf_open_port - create and send open port request
1424 * @erp_action: pointer to struct zfcp_erp_action
1425 * Returns: 0 on success, error otherwise
1426 */
1427 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1428 {
1429 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1430 struct zfcp_port *port = erp_action->port;
1431 struct zfcp_fsf_req *req;
1432 int retval = -EIO;
1433
1434 spin_lock_bh(&qdio->req_q_lock);
1435 if (zfcp_qdio_sbal_get(qdio))
1436 goto out;
1437
1438 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1439 SBAL_FLAGS0_TYPE_READ,
1440 qdio->adapter->pool.erp_req);
1441
1442 if (IS_ERR(req)) {
1443 retval = PTR_ERR(req);
1444 goto out;
1445 }
1446
1447 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1448 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1449
1450 req->handler = zfcp_fsf_open_port_handler;
1451 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1452 req->data = port;
1453 req->erp_action = erp_action;
1454 erp_action->fsf_req_id = req->req_id;
1455 get_device(&port->dev);
1456
1457 zfcp_fsf_start_erp_timer(req);
1458 retval = zfcp_fsf_req_send(req);
1459 if (retval) {
1460 zfcp_fsf_req_free(req);
1461 erp_action->fsf_req_id = 0;
1462 put_device(&port->dev);
1463 }
1464 out:
1465 spin_unlock_bh(&qdio->req_q_lock);
1466 return retval;
1467 }
1468
1469 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1470 {
1471 struct zfcp_port *port = req->data;
1472
1473 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1474 return;
1475
1476 switch (req->qtcb->header.fsf_status) {
1477 case FSF_PORT_HANDLE_NOT_VALID:
1478 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1479 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1480 break;
1481 case FSF_ADAPTER_STATUS_AVAILABLE:
1482 break;
1483 case FSF_GOOD:
1484 zfcp_erp_modify_port_status(port, "fscph_2", req,
1485 ZFCP_STATUS_COMMON_OPEN,
1486 ZFCP_CLEAR);
1487 break;
1488 }
1489 }
1490
1491 /**
1492 * zfcp_fsf_close_port - create and send close port request
1493 * @erp_action: pointer to struct zfcp_erp_action
1494 * Returns: 0 on success, error otherwise
1495 */
1496 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1497 {
1498 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1499 struct zfcp_fsf_req *req;
1500 int retval = -EIO;
1501
1502 spin_lock_bh(&qdio->req_q_lock);
1503 if (zfcp_qdio_sbal_get(qdio))
1504 goto out;
1505
1506 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1507 SBAL_FLAGS0_TYPE_READ,
1508 qdio->adapter->pool.erp_req);
1509
1510 if (IS_ERR(req)) {
1511 retval = PTR_ERR(req);
1512 goto out;
1513 }
1514
1515 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1516 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1517
1518 req->handler = zfcp_fsf_close_port_handler;
1519 req->data = erp_action->port;
1520 req->erp_action = erp_action;
1521 req->qtcb->header.port_handle = erp_action->port->handle;
1522 erp_action->fsf_req_id = req->req_id;
1523
1524 zfcp_fsf_start_erp_timer(req);
1525 retval = zfcp_fsf_req_send(req);
1526 if (retval) {
1527 zfcp_fsf_req_free(req);
1528 erp_action->fsf_req_id = 0;
1529 }
1530 out:
1531 spin_unlock_bh(&qdio->req_q_lock);
1532 return retval;
1533 }
1534
1535 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1536 {
1537 struct zfcp_fc_wka_port *wka_port = req->data;
1538 struct fsf_qtcb_header *header = &req->qtcb->header;
1539
1540 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1541 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1542 goto out;
1543 }
1544
1545 switch (header->fsf_status) {
1546 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1547 dev_warn(&req->adapter->ccw_device->dev,
1548 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1549 /* fall through */
1550 case FSF_ADAPTER_STATUS_AVAILABLE:
1551 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1552 /* fall through */
1553 case FSF_ACCESS_DENIED:
1554 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1555 break;
1556 case FSF_GOOD:
1557 wka_port->handle = header->port_handle;
1558 /* fall through */
1559 case FSF_PORT_ALREADY_OPEN:
1560 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1561 }
1562 out:
1563 wake_up(&wka_port->completion_wq);
1564 }
1565
1566 /**
1567 * zfcp_fsf_open_wka_port - create and send open wka-port request
1568 * @wka_port: pointer to struct zfcp_fc_wka_port
1569 * Returns: 0 on success, error otherwise
1570 */
1571 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1572 {
1573 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1574 struct zfcp_fsf_req *req;
1575 int retval = -EIO;
1576
1577 spin_lock_bh(&qdio->req_q_lock);
1578 if (zfcp_qdio_sbal_get(qdio))
1579 goto out;
1580
1581 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1582 SBAL_FLAGS0_TYPE_READ,
1583 qdio->adapter->pool.erp_req);
1584
1585 if (unlikely(IS_ERR(req))) {
1586 retval = PTR_ERR(req);
1587 goto out;
1588 }
1589
1590 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1591 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1592
1593 req->handler = zfcp_fsf_open_wka_port_handler;
1594 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1595 req->data = wka_port;
1596
1597 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1598 retval = zfcp_fsf_req_send(req);
1599 if (retval)
1600 zfcp_fsf_req_free(req);
1601 out:
1602 spin_unlock_bh(&qdio->req_q_lock);
1603 return retval;
1604 }
1605
1606 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1607 {
1608 struct zfcp_fc_wka_port *wka_port = req->data;
1609
1610 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1611 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1612 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1613 }
1614
1615 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1616 wake_up(&wka_port->completion_wq);
1617 }
1618
1619 /**
1620 * zfcp_fsf_close_wka_port - create and send close wka port request
1621 * @wka_port: WKA port to open
1622 * Returns: 0 on success, error otherwise
1623 */
1624 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1625 {
1626 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1627 struct zfcp_fsf_req *req;
1628 int retval = -EIO;
1629
1630 spin_lock_bh(&qdio->req_q_lock);
1631 if (zfcp_qdio_sbal_get(qdio))
1632 goto out;
1633
1634 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1635 SBAL_FLAGS0_TYPE_READ,
1636 qdio->adapter->pool.erp_req);
1637
1638 if (unlikely(IS_ERR(req))) {
1639 retval = PTR_ERR(req);
1640 goto out;
1641 }
1642
1643 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1644 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1645
1646 req->handler = zfcp_fsf_close_wka_port_handler;
1647 req->data = wka_port;
1648 req->qtcb->header.port_handle = wka_port->handle;
1649
1650 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1651 retval = zfcp_fsf_req_send(req);
1652 if (retval)
1653 zfcp_fsf_req_free(req);
1654 out:
1655 spin_unlock_bh(&qdio->req_q_lock);
1656 return retval;
1657 }
1658
1659 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1660 {
1661 struct zfcp_port *port = req->data;
1662 struct fsf_qtcb_header *header = &req->qtcb->header;
1663 struct zfcp_unit *unit;
1664
1665 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1666 return;
1667
1668 switch (header->fsf_status) {
1669 case FSF_PORT_HANDLE_NOT_VALID:
1670 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1671 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1672 break;
1673 case FSF_ACCESS_DENIED:
1674 zfcp_fsf_access_denied_port(req, port);
1675 break;
1676 case FSF_PORT_BOXED:
1677 /* can't use generic zfcp_erp_modify_port_status because
1678 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1679 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1680 read_lock(&port->unit_list_lock);
1681 list_for_each_entry(unit, &port->unit_list, list)
1682 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1683 &unit->status);
1684 read_unlock(&port->unit_list_lock);
1685 zfcp_erp_port_boxed(port, "fscpph2", req);
1686 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1687 break;
1688 case FSF_ADAPTER_STATUS_AVAILABLE:
1689 switch (header->fsf_status_qual.word[0]) {
1690 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1691 /* fall through */
1692 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1693 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1694 break;
1695 }
1696 break;
1697 case FSF_GOOD:
1698 /* can't use generic zfcp_erp_modify_port_status because
1699 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1700 */
1701 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1702 read_lock(&port->unit_list_lock);
1703 list_for_each_entry(unit, &port->unit_list, list)
1704 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1705 &unit->status);
1706 read_unlock(&port->unit_list_lock);
1707 break;
1708 }
1709 }
1710
1711 /**
1712 * zfcp_fsf_close_physical_port - close physical port
1713 * @erp_action: pointer to struct zfcp_erp_action
1714 * Returns: 0 on success
1715 */
1716 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1717 {
1718 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1719 struct zfcp_fsf_req *req;
1720 int retval = -EIO;
1721
1722 spin_lock_bh(&qdio->req_q_lock);
1723 if (zfcp_qdio_sbal_get(qdio))
1724 goto out;
1725
1726 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1727 SBAL_FLAGS0_TYPE_READ,
1728 qdio->adapter->pool.erp_req);
1729
1730 if (IS_ERR(req)) {
1731 retval = PTR_ERR(req);
1732 goto out;
1733 }
1734
1735 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1736 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1737
1738 req->data = erp_action->port;
1739 req->qtcb->header.port_handle = erp_action->port->handle;
1740 req->erp_action = erp_action;
1741 req->handler = zfcp_fsf_close_physical_port_handler;
1742 erp_action->fsf_req_id = req->req_id;
1743
1744 zfcp_fsf_start_erp_timer(req);
1745 retval = zfcp_fsf_req_send(req);
1746 if (retval) {
1747 zfcp_fsf_req_free(req);
1748 erp_action->fsf_req_id = 0;
1749 }
1750 out:
1751 spin_unlock_bh(&qdio->req_q_lock);
1752 return retval;
1753 }
1754
1755 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1756 {
1757 struct zfcp_adapter *adapter = req->adapter;
1758 struct zfcp_unit *unit = req->data;
1759 struct fsf_qtcb_header *header = &req->qtcb->header;
1760 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1761 struct fsf_queue_designator *queue_designator =
1762 &header->fsf_status_qual.fsf_queue_designator;
1763 int exclusive, readwrite;
1764
1765 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1766 return;
1767
1768 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1769 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1770 ZFCP_STATUS_UNIT_SHARED |
1771 ZFCP_STATUS_UNIT_READONLY,
1772 &unit->status);
1773
1774 switch (header->fsf_status) {
1775
1776 case FSF_PORT_HANDLE_NOT_VALID:
1777 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1778 /* fall through */
1779 case FSF_LUN_ALREADY_OPEN:
1780 break;
1781 case FSF_ACCESS_DENIED:
1782 zfcp_fsf_access_denied_unit(req, unit);
1783 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1784 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1785 break;
1786 case FSF_PORT_BOXED:
1787 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1788 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1789 break;
1790 case FSF_LUN_SHARING_VIOLATION:
1791 if (header->fsf_status_qual.word[0])
1792 dev_warn(&adapter->ccw_device->dev,
1793 "LUN 0x%Lx on port 0x%Lx is already in "
1794 "use by CSS%d, MIF Image ID %x\n",
1795 (unsigned long long)unit->fcp_lun,
1796 (unsigned long long)unit->port->wwpn,
1797 queue_designator->cssid,
1798 queue_designator->hla);
1799 else
1800 zfcp_act_eval_err(adapter,
1801 header->fsf_status_qual.word[2]);
1802 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1803 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1804 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1805 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1806 break;
1807 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1808 dev_warn(&adapter->ccw_device->dev,
1809 "No handle is available for LUN "
1810 "0x%016Lx on port 0x%016Lx\n",
1811 (unsigned long long)unit->fcp_lun,
1812 (unsigned long long)unit->port->wwpn);
1813 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1814 /* fall through */
1815 case FSF_INVALID_COMMAND_OPTION:
1816 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1817 break;
1818 case FSF_ADAPTER_STATUS_AVAILABLE:
1819 switch (header->fsf_status_qual.word[0]) {
1820 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1821 zfcp_fc_test_link(unit->port);
1822 /* fall through */
1823 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1824 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1825 break;
1826 }
1827 break;
1828
1829 case FSF_GOOD:
1830 unit->handle = header->lun_handle;
1831 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1832
1833 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1834 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1835 !zfcp_ccw_priv_sch(adapter)) {
1836 exclusive = (bottom->lun_access_info &
1837 FSF_UNIT_ACCESS_EXCLUSIVE);
1838 readwrite = (bottom->lun_access_info &
1839 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1840
1841 if (!exclusive)
1842 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1843 &unit->status);
1844
1845 if (!readwrite) {
1846 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1847 &unit->status);
1848 dev_info(&adapter->ccw_device->dev,
1849 "SCSI device at LUN 0x%016Lx on port "
1850 "0x%016Lx opened read-only\n",
1851 (unsigned long long)unit->fcp_lun,
1852 (unsigned long long)unit->port->wwpn);
1853 }
1854
1855 if (exclusive && !readwrite) {
1856 dev_err(&adapter->ccw_device->dev,
1857 "Exclusive read-only access not "
1858 "supported (unit 0x%016Lx, "
1859 "port 0x%016Lx)\n",
1860 (unsigned long long)unit->fcp_lun,
1861 (unsigned long long)unit->port->wwpn);
1862 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1863 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1864 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1865 } else if (!exclusive && readwrite) {
1866 dev_err(&adapter->ccw_device->dev,
1867 "Shared read-write access not "
1868 "supported (unit 0x%016Lx, port "
1869 "0x%016Lx)\n",
1870 (unsigned long long)unit->fcp_lun,
1871 (unsigned long long)unit->port->wwpn);
1872 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1874 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1875 }
1876 }
1877 break;
1878 }
1879 }
1880
1881 /**
1882 * zfcp_fsf_open_unit - open unit
1883 * @erp_action: pointer to struct zfcp_erp_action
1884 * Returns: 0 on success, error otherwise
1885 */
1886 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1887 {
1888 struct zfcp_adapter *adapter = erp_action->adapter;
1889 struct zfcp_qdio *qdio = adapter->qdio;
1890 struct zfcp_fsf_req *req;
1891 int retval = -EIO;
1892
1893 spin_lock_bh(&qdio->req_q_lock);
1894 if (zfcp_qdio_sbal_get(qdio))
1895 goto out;
1896
1897 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1898 SBAL_FLAGS0_TYPE_READ,
1899 adapter->pool.erp_req);
1900
1901 if (IS_ERR(req)) {
1902 retval = PTR_ERR(req);
1903 goto out;
1904 }
1905
1906 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1907 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1908
1909 req->qtcb->header.port_handle = erp_action->port->handle;
1910 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1911 req->handler = zfcp_fsf_open_unit_handler;
1912 req->data = erp_action->unit;
1913 req->erp_action = erp_action;
1914 erp_action->fsf_req_id = req->req_id;
1915
1916 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1917 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1918
1919 zfcp_fsf_start_erp_timer(req);
1920 retval = zfcp_fsf_req_send(req);
1921 if (retval) {
1922 zfcp_fsf_req_free(req);
1923 erp_action->fsf_req_id = 0;
1924 }
1925 out:
1926 spin_unlock_bh(&qdio->req_q_lock);
1927 return retval;
1928 }
1929
1930 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1931 {
1932 struct zfcp_unit *unit = req->data;
1933
1934 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1935 return;
1936
1937 switch (req->qtcb->header.fsf_status) {
1938 case FSF_PORT_HANDLE_NOT_VALID:
1939 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
1940 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1941 break;
1942 case FSF_LUN_HANDLE_NOT_VALID:
1943 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
1944 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1945 break;
1946 case FSF_PORT_BOXED:
1947 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
1948 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1949 break;
1950 case FSF_ADAPTER_STATUS_AVAILABLE:
1951 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1952 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1953 zfcp_fc_test_link(unit->port);
1954 /* fall through */
1955 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1956 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1957 break;
1958 }
1959 break;
1960 case FSF_GOOD:
1961 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1962 break;
1963 }
1964 }
1965
1966 /**
1967 * zfcp_fsf_close_unit - close zfcp unit
1968 * @erp_action: pointer to struct zfcp_unit
1969 * Returns: 0 on success, error otherwise
1970 */
1971 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1972 {
1973 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1974 struct zfcp_fsf_req *req;
1975 int retval = -EIO;
1976
1977 spin_lock_bh(&qdio->req_q_lock);
1978 if (zfcp_qdio_sbal_get(qdio))
1979 goto out;
1980
1981 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1982 SBAL_FLAGS0_TYPE_READ,
1983 qdio->adapter->pool.erp_req);
1984
1985 if (IS_ERR(req)) {
1986 retval = PTR_ERR(req);
1987 goto out;
1988 }
1989
1990 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1991 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1992
1993 req->qtcb->header.port_handle = erp_action->port->handle;
1994 req->qtcb->header.lun_handle = erp_action->unit->handle;
1995 req->handler = zfcp_fsf_close_unit_handler;
1996 req->data = erp_action->unit;
1997 req->erp_action = erp_action;
1998 erp_action->fsf_req_id = req->req_id;
1999
2000 zfcp_fsf_start_erp_timer(req);
2001 retval = zfcp_fsf_req_send(req);
2002 if (retval) {
2003 zfcp_fsf_req_free(req);
2004 erp_action->fsf_req_id = 0;
2005 }
2006 out:
2007 spin_unlock_bh(&qdio->req_q_lock);
2008 return retval;
2009 }
2010
2011 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2012 {
2013 lat_rec->sum += lat;
2014 lat_rec->min = min(lat_rec->min, lat);
2015 lat_rec->max = max(lat_rec->max, lat);
2016 }
2017
2018 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2019 {
2020 struct fsf_qual_latency_info *lat_in;
2021 struct latency_cont *lat = NULL;
2022 struct zfcp_unit *unit = req->unit;
2023 struct zfcp_blk_drv_data blktrc;
2024 int ticks = req->adapter->timer_ticks;
2025
2026 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2027
2028 blktrc.flags = 0;
2029 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2030 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2031 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2032 blktrc.inb_usage = req->qdio_req.qdio_inb_usage;
2033 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2034
2035 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2036 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2037 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2038 blktrc.channel_lat = lat_in->channel_lat * ticks;
2039 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2040
2041 switch (req->qtcb->bottom.io.data_direction) {
2042 case FSF_DATADIR_READ:
2043 lat = &unit->latencies.read;
2044 break;
2045 case FSF_DATADIR_WRITE:
2046 lat = &unit->latencies.write;
2047 break;
2048 case FSF_DATADIR_CMND:
2049 lat = &unit->latencies.cmd;
2050 break;
2051 }
2052
2053 if (lat) {
2054 spin_lock(&unit->latencies.lock);
2055 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2056 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2057 lat->counter++;
2058 spin_unlock(&unit->latencies.lock);
2059 }
2060 }
2061
2062 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2063 sizeof(blktrc));
2064 }
2065
2066 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2067 {
2068 struct scsi_cmnd *scpnt;
2069 struct fcp_resp_with_ext *fcp_rsp;
2070 unsigned long flags;
2071
2072 read_lock_irqsave(&req->adapter->abort_lock, flags);
2073
2074 scpnt = req->data;
2075 if (unlikely(!scpnt)) {
2076 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2077 return;
2078 }
2079
2080 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2081 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2082 goto skip_fsfstatus;
2083 }
2084
2085 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2086 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2087
2088 skip_fsfstatus:
2089 zfcp_fsf_req_trace(req, scpnt);
2090 zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
2091
2092 scpnt->host_scribble = NULL;
2093 (scpnt->scsi_done) (scpnt);
2094 /*
2095 * We must hold this lock until scsi_done has been called.
2096 * Otherwise we may call scsi_done after abort regarding this
2097 * command has completed.
2098 * Note: scsi_done must not block!
2099 */
2100 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2101 }
2102
2103 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2104 {
2105 struct fcp_resp_with_ext *fcp_rsp;
2106 struct fcp_resp_rsp_info *rsp_info;
2107
2108 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2109 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2110
2111 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2112 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2113 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2114 }
2115
2116
2117 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2118 {
2119 struct zfcp_unit *unit;
2120 struct fsf_qtcb_header *header = &req->qtcb->header;
2121
2122 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2123 unit = req->data;
2124 else
2125 unit = req->unit;
2126
2127 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2128 goto skip_fsfstatus;
2129
2130 switch (header->fsf_status) {
2131 case FSF_HANDLE_MISMATCH:
2132 case FSF_PORT_HANDLE_NOT_VALID:
2133 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2134 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2135 break;
2136 case FSF_FCPLUN_NOT_VALID:
2137 case FSF_LUN_HANDLE_NOT_VALID:
2138 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2139 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2140 break;
2141 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2142 zfcp_fsf_class_not_supp(req);
2143 break;
2144 case FSF_ACCESS_DENIED:
2145 zfcp_fsf_access_denied_unit(req, unit);
2146 break;
2147 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2148 dev_err(&req->adapter->ccw_device->dev,
2149 "Incorrect direction %d, unit 0x%016Lx on port "
2150 "0x%016Lx closed\n",
2151 req->qtcb->bottom.io.data_direction,
2152 (unsigned long long)unit->fcp_lun,
2153 (unsigned long long)unit->port->wwpn);
2154 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2155 req);
2156 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2157 break;
2158 case FSF_CMND_LENGTH_NOT_VALID:
2159 dev_err(&req->adapter->ccw_device->dev,
2160 "Incorrect CDB length %d, unit 0x%016Lx on "
2161 "port 0x%016Lx closed\n",
2162 req->qtcb->bottom.io.fcp_cmnd_length,
2163 (unsigned long long)unit->fcp_lun,
2164 (unsigned long long)unit->port->wwpn);
2165 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2166 req);
2167 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2168 break;
2169 case FSF_PORT_BOXED:
2170 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2171 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2172 break;
2173 case FSF_LUN_BOXED:
2174 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2175 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2176 break;
2177 case FSF_ADAPTER_STATUS_AVAILABLE:
2178 if (header->fsf_status_qual.word[0] ==
2179 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2180 zfcp_fc_test_link(unit->port);
2181 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2182 break;
2183 }
2184 skip_fsfstatus:
2185 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2186 zfcp_fsf_send_fcp_ctm_handler(req);
2187 else {
2188 zfcp_fsf_send_fcp_command_task_handler(req);
2189 req->unit = NULL;
2190 put_device(&unit->dev);
2191 }
2192 }
2193
2194 /**
2195 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2196 * @unit: unit where command is sent to
2197 * @scsi_cmnd: scsi command to be sent
2198 */
2199 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2200 struct scsi_cmnd *scsi_cmnd)
2201 {
2202 struct zfcp_fsf_req *req;
2203 struct fcp_cmnd *fcp_cmnd;
2204 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2205 int real_bytes, retval = -EIO;
2206 struct zfcp_adapter *adapter = unit->port->adapter;
2207 struct zfcp_qdio *qdio = adapter->qdio;
2208
2209 if (unlikely(!(atomic_read(&unit->status) &
2210 ZFCP_STATUS_COMMON_UNBLOCKED)))
2211 return -EBUSY;
2212
2213 spin_lock(&qdio->req_q_lock);
2214 if (atomic_read(&qdio->req_q.count) <= 0) {
2215 atomic_inc(&qdio->req_q_full);
2216 goto out;
2217 }
2218
2219 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2220 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2221
2222 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2223 sbtype, adapter->pool.scsi_req);
2224
2225 if (IS_ERR(req)) {
2226 retval = PTR_ERR(req);
2227 goto out;
2228 }
2229
2230 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2231 req->unit = unit;
2232 req->data = scsi_cmnd;
2233 req->handler = zfcp_fsf_send_fcp_command_handler;
2234 req->qtcb->header.lun_handle = unit->handle;
2235 req->qtcb->header.port_handle = unit->port->handle;
2236 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2237 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2238
2239 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2240
2241 /*
2242 * set depending on data direction:
2243 * data direction bits in SBALE (SB Type)
2244 * data direction bits in QTCB
2245 */
2246 switch (scsi_cmnd->sc_data_direction) {
2247 case DMA_NONE:
2248 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2249 break;
2250 case DMA_FROM_DEVICE:
2251 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2252 break;
2253 case DMA_TO_DEVICE:
2254 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2255 break;
2256 case DMA_BIDIRECTIONAL:
2257 goto failed_scsi_cmnd;
2258 }
2259
2260 get_device(&unit->dev);
2261
2262 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2263 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2264
2265 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2266 scsi_sglist(scsi_cmnd),
2267 ZFCP_FSF_MAX_SBALS_PER_REQ);
2268 if (unlikely(real_bytes < 0)) {
2269 if (req->qdio_req.sbal_number >= ZFCP_FSF_MAX_SBALS_PER_REQ) {
2270 dev_err(&adapter->ccw_device->dev,
2271 "Oversize data package, unit 0x%016Lx "
2272 "on port 0x%016Lx closed\n",
2273 (unsigned long long)unit->fcp_lun,
2274 (unsigned long long)unit->port->wwpn);
2275 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2276 retval = -EINVAL;
2277 }
2278 goto failed_scsi_cmnd;
2279 }
2280
2281 retval = zfcp_fsf_req_send(req);
2282 if (unlikely(retval))
2283 goto failed_scsi_cmnd;
2284
2285 goto out;
2286
2287 failed_scsi_cmnd:
2288 put_device(&unit->dev);
2289 zfcp_fsf_req_free(req);
2290 scsi_cmnd->host_scribble = NULL;
2291 out:
2292 spin_unlock(&qdio->req_q_lock);
2293 return retval;
2294 }
2295
2296 /**
2297 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2298 * @unit: pointer to struct zfcp_unit
2299 * @tm_flags: unsigned byte for task management flags
2300 * Returns: on success pointer to struct fsf_req, NULL otherwise
2301 */
2302 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2303 {
2304 struct zfcp_fsf_req *req = NULL;
2305 struct fcp_cmnd *fcp_cmnd;
2306 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2307
2308 if (unlikely(!(atomic_read(&unit->status) &
2309 ZFCP_STATUS_COMMON_UNBLOCKED)))
2310 return NULL;
2311
2312 spin_lock_bh(&qdio->req_q_lock);
2313 if (zfcp_qdio_sbal_get(qdio))
2314 goto out;
2315
2316 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2317 SBAL_FLAGS0_TYPE_WRITE,
2318 qdio->adapter->pool.scsi_req);
2319
2320 if (IS_ERR(req)) {
2321 req = NULL;
2322 goto out;
2323 }
2324
2325 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2326 req->data = unit;
2327 req->handler = zfcp_fsf_send_fcp_command_handler;
2328 req->qtcb->header.lun_handle = unit->handle;
2329 req->qtcb->header.port_handle = unit->port->handle;
2330 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2331 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2332 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2333
2334 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2335
2336 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2337 zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2338
2339 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2340 if (!zfcp_fsf_req_send(req))
2341 goto out;
2342
2343 zfcp_fsf_req_free(req);
2344 req = NULL;
2345 out:
2346 spin_unlock_bh(&qdio->req_q_lock);
2347 return req;
2348 }
2349
2350 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2351 {
2352 }
2353
2354 /**
2355 * zfcp_fsf_control_file - control file upload/download
2356 * @adapter: pointer to struct zfcp_adapter
2357 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2358 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2359 */
2360 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2361 struct zfcp_fsf_cfdc *fsf_cfdc)
2362 {
2363 struct zfcp_qdio *qdio = adapter->qdio;
2364 struct zfcp_fsf_req *req = NULL;
2365 struct fsf_qtcb_bottom_support *bottom;
2366 int direction, retval = -EIO, bytes;
2367
2368 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2369 return ERR_PTR(-EOPNOTSUPP);
2370
2371 switch (fsf_cfdc->command) {
2372 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2373 direction = SBAL_FLAGS0_TYPE_WRITE;
2374 break;
2375 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2376 direction = SBAL_FLAGS0_TYPE_READ;
2377 break;
2378 default:
2379 return ERR_PTR(-EINVAL);
2380 }
2381
2382 spin_lock_bh(&qdio->req_q_lock);
2383 if (zfcp_qdio_sbal_get(qdio))
2384 goto out;
2385
2386 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2387 if (IS_ERR(req)) {
2388 retval = -EPERM;
2389 goto out;
2390 }
2391
2392 req->handler = zfcp_fsf_control_file_handler;
2393
2394 bottom = &req->qtcb->bottom.support;
2395 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2396 bottom->option = fsf_cfdc->option;
2397
2398 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2399 fsf_cfdc->sg,
2400 ZFCP_FSF_MAX_SBALS_PER_REQ);
2401 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2402 zfcp_fsf_req_free(req);
2403 goto out;
2404 }
2405
2406 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2407 retval = zfcp_fsf_req_send(req);
2408 out:
2409 spin_unlock_bh(&qdio->req_q_lock);
2410
2411 if (!retval) {
2412 wait_for_completion(&req->completion);
2413 return req;
2414 }
2415 return ERR_PTR(retval);
2416 }
2417
2418 /**
2419 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2420 * @adapter: pointer to struct zfcp_adapter
2421 * @sbal_idx: response queue index of SBAL to be processed
2422 */
2423 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2424 {
2425 struct zfcp_adapter *adapter = qdio->adapter;
2426 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2427 struct qdio_buffer_element *sbale;
2428 struct zfcp_fsf_req *fsf_req;
2429 unsigned long req_id;
2430 int idx;
2431
2432 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2433
2434 sbale = &sbal->element[idx];
2435 req_id = (unsigned long) sbale->addr;
2436 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2437
2438 if (!fsf_req)
2439 /*
2440 * Unknown request means that we have potentially memory
2441 * corruption and must stop the machine immediately.
2442 */
2443 panic("error: unknown req_id (%lx) on adapter %s.\n",
2444 req_id, dev_name(&adapter->ccw_device->dev));
2445
2446 fsf_req->qdio_req.sbal_response = sbal_idx;
2447 fsf_req->qdio_req.qdio_inb_usage =
2448 atomic_read(&qdio->resp_q.count);
2449 zfcp_fsf_req_complete(fsf_req);
2450
2451 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2452 break;
2453 }
2454 }
Linux with added FPC-III support