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On Tue, Nov 06, 2007 at 02:33:53AM -0800, akpm@linux-foundation.org wrote:
[mmotm.git] / drivers / s390 / scsi / zfcp_fsf.c
blob38a7e4a6b6394e3b881c131fb63e3b8da9f81225
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);
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 else {
1481 port->wwnn = plogi->serv_param.wwnn;
1482 zfcp_fc_plogi_evaluate(port, plogi);
1483 }
1484 }
1485 break;
1486 case FSF_UNKNOWN_OP_SUBTYPE:
1487 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1488 break;
1489 }
1490
1491 out:
1492 zfcp_port_put(port);
1493 }
1494
1495 /**
1496 * zfcp_fsf_open_port - create and send open port request
1497 * @erp_action: pointer to struct zfcp_erp_action
1498 * Returns: 0 on success, error otherwise
1499 */
1500 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1501 {
1502 struct qdio_buffer_element *sbale;
1503 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1504 struct zfcp_port *port = erp_action->port;
1505 struct zfcp_fsf_req *req;
1506 int retval = -EIO;
1507
1508 spin_lock_bh(&qdio->req_q_lock);
1509 if (zfcp_fsf_req_sbal_get(qdio))
1510 goto out;
1511
1512 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1513 qdio->adapter->pool.erp_req);
1514
1515 if (IS_ERR(req)) {
1516 retval = PTR_ERR(req);
1517 goto out;
1518 }
1519
1520 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1521 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1522 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1523 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1524
1525 req->handler = zfcp_fsf_open_port_handler;
1526 req->qtcb->bottom.support.d_id = port->d_id;
1527 req->data = port;
1528 req->erp_action = erp_action;
1529 erp_action->fsf_req = req;
1530 zfcp_port_get(port);
1531
1532 zfcp_fsf_start_erp_timer(req);
1533 retval = zfcp_fsf_req_send(req);
1534 if (retval) {
1535 zfcp_fsf_req_free(req);
1536 erp_action->fsf_req = NULL;
1537 zfcp_port_put(port);
1538 }
1539 out:
1540 spin_unlock_bh(&qdio->req_q_lock);
1541 return retval;
1542 }
1543
1544 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1545 {
1546 struct zfcp_port *port = req->data;
1547
1548 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1549 return;
1550
1551 switch (req->qtcb->header.fsf_status) {
1552 case FSF_PORT_HANDLE_NOT_VALID:
1553 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1554 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1555 break;
1556 case FSF_ADAPTER_STATUS_AVAILABLE:
1557 break;
1558 case FSF_GOOD:
1559 zfcp_erp_modify_port_status(port, "fscph_2", req,
1560 ZFCP_STATUS_COMMON_OPEN,
1561 ZFCP_CLEAR);
1562 break;
1563 }
1564 }
1565
1566 /**
1567 * zfcp_fsf_close_port - create and send close port request
1568 * @erp_action: pointer to struct zfcp_erp_action
1569 * Returns: 0 on success, error otherwise
1570 */
1571 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1572 {
1573 struct qdio_buffer_element *sbale;
1574 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1575 struct zfcp_fsf_req *req;
1576 int retval = -EIO;
1577
1578 spin_lock_bh(&qdio->req_q_lock);
1579 if (zfcp_fsf_req_sbal_get(qdio))
1580 goto out;
1581
1582 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1583 qdio->adapter->pool.erp_req);
1584
1585 if (IS_ERR(req)) {
1586 retval = PTR_ERR(req);
1587 goto out;
1588 }
1589
1590 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1591 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1592 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1593 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1594
1595 req->handler = zfcp_fsf_close_port_handler;
1596 req->data = erp_action->port;
1597 req->erp_action = erp_action;
1598 req->qtcb->header.port_handle = erp_action->port->handle;
1599 erp_action->fsf_req = req;
1600
1601 zfcp_fsf_start_erp_timer(req);
1602 retval = zfcp_fsf_req_send(req);
1603 if (retval) {
1604 zfcp_fsf_req_free(req);
1605 erp_action->fsf_req = NULL;
1606 }
1607 out:
1608 spin_unlock_bh(&qdio->req_q_lock);
1609 return retval;
1610 }
1611
1612 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1613 {
1614 struct zfcp_wka_port *wka_port = req->data;
1615 struct fsf_qtcb_header *header = &req->qtcb->header;
1616
1617 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1618 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1619 goto out;
1620 }
1621
1622 switch (header->fsf_status) {
1623 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1624 dev_warn(&req->adapter->ccw_device->dev,
1625 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1626 /* fall through */
1627 case FSF_ADAPTER_STATUS_AVAILABLE:
1628 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1629 /* fall through */
1630 case FSF_ACCESS_DENIED:
1631 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1632 break;
1633 case FSF_GOOD:
1634 wka_port->handle = header->port_handle;
1635 /* fall through */
1636 case FSF_PORT_ALREADY_OPEN:
1637 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1638 }
1639 out:
1640 wake_up(&wka_port->completion_wq);
1641 }
1642
1643 /**
1644 * zfcp_fsf_open_wka_port - create and send open wka-port request
1645 * @wka_port: pointer to struct zfcp_wka_port
1646 * Returns: 0 on success, error otherwise
1647 */
1648 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1649 {
1650 struct qdio_buffer_element *sbale;
1651 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1652 struct zfcp_fsf_req *req;
1653 int retval = -EIO;
1654
1655 spin_lock_bh(&qdio->req_q_lock);
1656 if (zfcp_fsf_req_sbal_get(qdio))
1657 goto out;
1658
1659 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1660 qdio->adapter->pool.erp_req);
1661
1662 if (unlikely(IS_ERR(req))) {
1663 retval = PTR_ERR(req);
1664 goto out;
1665 }
1666
1667 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1668 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1669 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1670 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1671
1672 req->handler = zfcp_fsf_open_wka_port_handler;
1673 req->qtcb->bottom.support.d_id = wka_port->d_id;
1674 req->data = wka_port;
1675
1676 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1677 retval = zfcp_fsf_req_send(req);
1678 if (retval)
1679 zfcp_fsf_req_free(req);
1680 out:
1681 spin_unlock_bh(&qdio->req_q_lock);
1682 return retval;
1683 }
1684
1685 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1686 {
1687 struct zfcp_wka_port *wka_port = req->data;
1688
1689 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1690 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1691 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1692 }
1693
1694 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1695 wake_up(&wka_port->completion_wq);
1696 }
1697
1698 /**
1699 * zfcp_fsf_close_wka_port - create and send close wka port request
1700 * @erp_action: pointer to struct zfcp_erp_action
1701 * Returns: 0 on success, error otherwise
1702 */
1703 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1704 {
1705 struct qdio_buffer_element *sbale;
1706 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1707 struct zfcp_fsf_req *req;
1708 int retval = -EIO;
1709
1710 spin_lock_bh(&qdio->req_q_lock);
1711 if (zfcp_fsf_req_sbal_get(qdio))
1712 goto out;
1713
1714 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1715 qdio->adapter->pool.erp_req);
1716
1717 if (unlikely(IS_ERR(req))) {
1718 retval = PTR_ERR(req);
1719 goto out;
1720 }
1721
1722 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1723 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1724 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1725 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1726
1727 req->handler = zfcp_fsf_close_wka_port_handler;
1728 req->data = wka_port;
1729 req->qtcb->header.port_handle = wka_port->handle;
1730
1731 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1732 retval = zfcp_fsf_req_send(req);
1733 if (retval)
1734 zfcp_fsf_req_free(req);
1735 out:
1736 spin_unlock_bh(&qdio->req_q_lock);
1737 return retval;
1738 }
1739
1740 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1741 {
1742 struct zfcp_port *port = req->data;
1743 struct fsf_qtcb_header *header = &req->qtcb->header;
1744 struct zfcp_unit *unit;
1745
1746 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1747 return;
1748
1749 switch (header->fsf_status) {
1750 case FSF_PORT_HANDLE_NOT_VALID:
1751 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1752 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1753 break;
1754 case FSF_ACCESS_DENIED:
1755 zfcp_fsf_access_denied_port(req, port);
1756 break;
1757 case FSF_PORT_BOXED:
1758 /* can't use generic zfcp_erp_modify_port_status because
1759 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1760 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1761 list_for_each_entry(unit, &port->unit_list_head, list)
1762 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1763 &unit->status);
1764 zfcp_erp_port_boxed(port, "fscpph2", req);
1765 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1766 ZFCP_STATUS_FSFREQ_RETRY;
1767
1768 break;
1769 case FSF_ADAPTER_STATUS_AVAILABLE:
1770 switch (header->fsf_status_qual.word[0]) {
1771 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1772 /* fall through */
1773 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1774 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1775 break;
1776 }
1777 break;
1778 case FSF_GOOD:
1779 /* can't use generic zfcp_erp_modify_port_status because
1780 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1781 */
1782 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1783 list_for_each_entry(unit, &port->unit_list_head, list)
1784 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1785 &unit->status);
1786 break;
1787 }
1788 }
1789
1790 /**
1791 * zfcp_fsf_close_physical_port - close physical port
1792 * @erp_action: pointer to struct zfcp_erp_action
1793 * Returns: 0 on success
1794 */
1795 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1796 {
1797 struct qdio_buffer_element *sbale;
1798 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1799 struct zfcp_fsf_req *req;
1800 int retval = -EIO;
1801
1802 spin_lock_bh(&qdio->req_q_lock);
1803 if (zfcp_fsf_req_sbal_get(qdio))
1804 goto out;
1805
1806 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1807 qdio->adapter->pool.erp_req);
1808
1809 if (IS_ERR(req)) {
1810 retval = PTR_ERR(req);
1811 goto out;
1812 }
1813
1814 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1815 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1816 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1817 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1818
1819 req->data = erp_action->port;
1820 req->qtcb->header.port_handle = erp_action->port->handle;
1821 req->erp_action = erp_action;
1822 req->handler = zfcp_fsf_close_physical_port_handler;
1823 erp_action->fsf_req = req;
1824
1825 zfcp_fsf_start_erp_timer(req);
1826 retval = zfcp_fsf_req_send(req);
1827 if (retval) {
1828 zfcp_fsf_req_free(req);
1829 erp_action->fsf_req = NULL;
1830 }
1831 out:
1832 spin_unlock_bh(&qdio->req_q_lock);
1833 return retval;
1834 }
1835
1836 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1837 {
1838 struct zfcp_adapter *adapter = req->adapter;
1839 struct zfcp_unit *unit = req->data;
1840 struct fsf_qtcb_header *header = &req->qtcb->header;
1841 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1842 struct fsf_queue_designator *queue_designator =
1843 &header->fsf_status_qual.fsf_queue_designator;
1844 int exclusive, readwrite;
1845
1846 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1847 return;
1848
1849 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1850 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1851 ZFCP_STATUS_UNIT_SHARED |
1852 ZFCP_STATUS_UNIT_READONLY,
1853 &unit->status);
1854
1855 switch (header->fsf_status) {
1856
1857 case FSF_PORT_HANDLE_NOT_VALID:
1858 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1859 /* fall through */
1860 case FSF_LUN_ALREADY_OPEN:
1861 break;
1862 case FSF_ACCESS_DENIED:
1863 zfcp_fsf_access_denied_unit(req, unit);
1864 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1865 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1866 break;
1867 case FSF_PORT_BOXED:
1868 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1869 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1870 ZFCP_STATUS_FSFREQ_RETRY;
1871 break;
1872 case FSF_LUN_SHARING_VIOLATION:
1873 if (header->fsf_status_qual.word[0])
1874 dev_warn(&adapter->ccw_device->dev,
1875 "LUN 0x%Lx on port 0x%Lx is already in "
1876 "use by CSS%d, MIF Image ID %x\n",
1877 (unsigned long long)unit->fcp_lun,
1878 (unsigned long long)unit->port->wwpn,
1879 queue_designator->cssid,
1880 queue_designator->hla);
1881 else
1882 zfcp_act_eval_err(adapter,
1883 header->fsf_status_qual.word[2]);
1884 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1885 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1886 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1887 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1888 break;
1889 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1890 dev_warn(&adapter->ccw_device->dev,
1891 "No handle is available for LUN "
1892 "0x%016Lx on port 0x%016Lx\n",
1893 (unsigned long long)unit->fcp_lun,
1894 (unsigned long long)unit->port->wwpn);
1895 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1896 /* fall through */
1897 case FSF_INVALID_COMMAND_OPTION:
1898 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1899 break;
1900 case FSF_ADAPTER_STATUS_AVAILABLE:
1901 switch (header->fsf_status_qual.word[0]) {
1902 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1903 zfcp_fc_test_link(unit->port);
1904 /* fall through */
1905 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1906 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1907 break;
1908 }
1909 break;
1910
1911 case FSF_GOOD:
1912 unit->handle = header->lun_handle;
1913 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1914
1915 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1916 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1917 !zfcp_ccw_priv_sch(adapter)) {
1918 exclusive = (bottom->lun_access_info &
1919 FSF_UNIT_ACCESS_EXCLUSIVE);
1920 readwrite = (bottom->lun_access_info &
1921 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1922
1923 if (!exclusive)
1924 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1925 &unit->status);
1926
1927 if (!readwrite) {
1928 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1929 &unit->status);
1930 dev_info(&adapter->ccw_device->dev,
1931 "SCSI device at LUN 0x%016Lx on port "
1932 "0x%016Lx opened read-only\n",
1933 (unsigned long long)unit->fcp_lun,
1934 (unsigned long long)unit->port->wwpn);
1935 }
1936
1937 if (exclusive && !readwrite) {
1938 dev_err(&adapter->ccw_device->dev,
1939 "Exclusive read-only access not "
1940 "supported (unit 0x%016Lx, "
1941 "port 0x%016Lx)\n",
1942 (unsigned long long)unit->fcp_lun,
1943 (unsigned long long)unit->port->wwpn);
1944 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1945 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1946 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1947 } else if (!exclusive && readwrite) {
1948 dev_err(&adapter->ccw_device->dev,
1949 "Shared read-write access not "
1950 "supported (unit 0x%016Lx, port "
1951 "0x%016Lx)\n",
1952 (unsigned long long)unit->fcp_lun,
1953 (unsigned long long)unit->port->wwpn);
1954 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1955 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1956 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1957 }
1958 }
1959 break;
1960 }
1961 }
1962
1963 /**
1964 * zfcp_fsf_open_unit - open unit
1965 * @erp_action: pointer to struct zfcp_erp_action
1966 * Returns: 0 on success, error otherwise
1967 */
1968 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1969 {
1970 struct qdio_buffer_element *sbale;
1971 struct zfcp_adapter *adapter = erp_action->adapter;
1972 struct zfcp_qdio *qdio = adapter->qdio;
1973 struct zfcp_fsf_req *req;
1974 int retval = -EIO;
1975
1976 spin_lock_bh(&qdio->req_q_lock);
1977 if (zfcp_fsf_req_sbal_get(qdio))
1978 goto out;
1979
1980 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1981 adapter->pool.erp_req);
1982
1983 if (IS_ERR(req)) {
1984 retval = PTR_ERR(req);
1985 goto out;
1986 }
1987
1988 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1989 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1990 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1991 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1992
1993 req->qtcb->header.port_handle = erp_action->port->handle;
1994 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1995 req->handler = zfcp_fsf_open_unit_handler;
1996 req->data = erp_action->unit;
1997 req->erp_action = erp_action;
1998 erp_action->fsf_req = req;
1999
2000 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2001 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2002
2003 zfcp_fsf_start_erp_timer(req);
2004 retval = zfcp_fsf_req_send(req);
2005 if (retval) {
2006 zfcp_fsf_req_free(req);
2007 erp_action->fsf_req = NULL;
2008 }
2009 out:
2010 spin_unlock_bh(&qdio->req_q_lock);
2011 return retval;
2012 }
2013
2014 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2015 {
2016 struct zfcp_unit *unit = req->data;
2017
2018 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2019 return;
2020
2021 switch (req->qtcb->header.fsf_status) {
2022 case FSF_PORT_HANDLE_NOT_VALID:
2023 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2024 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2025 break;
2026 case FSF_LUN_HANDLE_NOT_VALID:
2027 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2028 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2029 break;
2030 case FSF_PORT_BOXED:
2031 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2032 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2033 ZFCP_STATUS_FSFREQ_RETRY;
2034 break;
2035 case FSF_ADAPTER_STATUS_AVAILABLE:
2036 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2037 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2038 zfcp_fc_test_link(unit->port);
2039 /* fall through */
2040 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2041 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2042 break;
2043 }
2044 break;
2045 case FSF_GOOD:
2046 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2047 break;
2048 }
2049 }
2050
2051 /**
2052 * zfcp_fsf_close_unit - close zfcp unit
2053 * @erp_action: pointer to struct zfcp_unit
2054 * Returns: 0 on success, error otherwise
2055 */
2056 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2057 {
2058 struct qdio_buffer_element *sbale;
2059 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2060 struct zfcp_fsf_req *req;
2061 int retval = -EIO;
2062
2063 spin_lock_bh(&qdio->req_q_lock);
2064 if (zfcp_fsf_req_sbal_get(qdio))
2065 goto out;
2066
2067 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2068 qdio->adapter->pool.erp_req);
2069
2070 if (IS_ERR(req)) {
2071 retval = PTR_ERR(req);
2072 goto out;
2073 }
2074
2075 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2076 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2077 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2078 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2079
2080 req->qtcb->header.port_handle = erp_action->port->handle;
2081 req->qtcb->header.lun_handle = erp_action->unit->handle;
2082 req->handler = zfcp_fsf_close_unit_handler;
2083 req->data = erp_action->unit;
2084 req->erp_action = erp_action;
2085 erp_action->fsf_req = req;
2086
2087 zfcp_fsf_start_erp_timer(req);
2088 retval = zfcp_fsf_req_send(req);
2089 if (retval) {
2090 zfcp_fsf_req_free(req);
2091 erp_action->fsf_req = NULL;
2092 }
2093 out:
2094 spin_unlock_bh(&qdio->req_q_lock);
2095 return retval;
2096 }
2097
2098 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2099 {
2100 lat_rec->sum += lat;
2101 lat_rec->min = min(lat_rec->min, lat);
2102 lat_rec->max = max(lat_rec->max, lat);
2103 }
2104
2105 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2106 {
2107 struct fsf_qual_latency_info *lat_inf;
2108 struct latency_cont *lat;
2109 struct zfcp_unit *unit = req->unit;
2110
2111 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2112
2113 switch (req->qtcb->bottom.io.data_direction) {
2114 case FSF_DATADIR_READ:
2115 lat = &unit->latencies.read;
2116 break;
2117 case FSF_DATADIR_WRITE:
2118 lat = &unit->latencies.write;
2119 break;
2120 case FSF_DATADIR_CMND:
2121 lat = &unit->latencies.cmd;
2122 break;
2123 default:
2124 return;
2125 }
2126
2127 spin_lock(&unit->latencies.lock);
2128 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2129 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2130 lat->counter++;
2131 spin_unlock(&unit->latencies.lock);
2132 }
2133
2134 #ifdef CONFIG_BLK_DEV_IO_TRACE
2135 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2136 {
2137 struct fsf_qual_latency_info *lat_inf;
2138 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2139 struct request *req = scsi_cmnd->request;
2140 struct zfcp_blk_drv_data trace;
2141 int ticks = fsf_req->adapter->timer_ticks;
2142
2143 trace.flags = 0;
2144 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2145 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2146 trace.flags |= ZFCP_BLK_LAT_VALID;
2147 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2148 trace.channel_lat = lat_inf->channel_lat * ticks;
2149 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2150 }
2151 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2152 trace.flags |= ZFCP_BLK_REQ_ERROR;
2153 trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2154 trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
2155
2156 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2157 }
2158 #else
2159 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2160 {
2161 }
2162 #endif
2163
2164 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2165 {
2166 struct scsi_cmnd *scpnt;
2167 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2168 &(req->qtcb->bottom.io.fcp_rsp);
2169 u32 sns_len;
2170 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2171 unsigned long flags;
2172
2173 read_lock_irqsave(&req->adapter->abort_lock, flags);
2174
2175 scpnt = req->data;
2176 if (unlikely(!scpnt)) {
2177 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2178 return;
2179 }
2180
2181 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2182 set_host_byte(scpnt, DID_SOFT_ERROR);
2183 goto skip_fsfstatus;
2184 }
2185
2186 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2187 set_host_byte(scpnt, DID_ERROR);
2188 goto skip_fsfstatus;
2189 }
2190
2191 set_msg_byte(scpnt, COMMAND_COMPLETE);
2192
2193 scpnt->result |= fcp_rsp_iu->scsi_status;
2194
2195 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2196 zfcp_fsf_req_latency(req);
2197
2198 zfcp_fsf_trace_latency(req);
2199
2200 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2201 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2202 set_host_byte(scpnt, DID_OK);
2203 else {
2204 set_host_byte(scpnt, DID_ERROR);
2205 goto skip_fsfstatus;
2206 }
2207 }
2208
2209 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2210 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2211 fcp_rsp_iu->fcp_rsp_len;
2212 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2213 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2214
2215 memcpy(scpnt->sense_buffer,
2216 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2217 }
2218
2219 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2220 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2221 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2222 scpnt->underflow)
2223 set_host_byte(scpnt, DID_ERROR);
2224 }
2225 skip_fsfstatus:
2226 if (scpnt->result != 0)
2227 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2228 else if (scpnt->retries > 0)
2229 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2230 else
2231 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2232
2233 scpnt->host_scribble = NULL;
2234 (scpnt->scsi_done) (scpnt);
2235 /*
2236 * We must hold this lock until scsi_done has been called.
2237 * Otherwise we may call scsi_done after abort regarding this
2238 * command has completed.
2239 * Note: scsi_done must not block!
2240 */
2241 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2242 }
2243
2244 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2245 {
2246 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2247 &(req->qtcb->bottom.io.fcp_rsp);
2248 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2249
2250 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2251 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2252 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2253 }
2254
2255
2256 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2257 {
2258 struct zfcp_unit *unit;
2259 struct fsf_qtcb_header *header = &req->qtcb->header;
2260
2261 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2262 unit = req->data;
2263 else
2264 unit = req->unit;
2265
2266 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2267 goto skip_fsfstatus;
2268
2269 switch (header->fsf_status) {
2270 case FSF_HANDLE_MISMATCH:
2271 case FSF_PORT_HANDLE_NOT_VALID:
2272 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2273 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2274 break;
2275 case FSF_FCPLUN_NOT_VALID:
2276 case FSF_LUN_HANDLE_NOT_VALID:
2277 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2278 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2279 break;
2280 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2281 zfcp_fsf_class_not_supp(req);
2282 break;
2283 case FSF_ACCESS_DENIED:
2284 zfcp_fsf_access_denied_unit(req, unit);
2285 break;
2286 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2287 dev_err(&req->adapter->ccw_device->dev,
2288 "Incorrect direction %d, unit 0x%016Lx on port "
2289 "0x%016Lx closed\n",
2290 req->qtcb->bottom.io.data_direction,
2291 (unsigned long long)unit->fcp_lun,
2292 (unsigned long long)unit->port->wwpn);
2293 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2294 req);
2295 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2296 break;
2297 case FSF_CMND_LENGTH_NOT_VALID:
2298 dev_err(&req->adapter->ccw_device->dev,
2299 "Incorrect CDB length %d, unit 0x%016Lx on "
2300 "port 0x%016Lx closed\n",
2301 req->qtcb->bottom.io.fcp_cmnd_length,
2302 (unsigned long long)unit->fcp_lun,
2303 (unsigned long long)unit->port->wwpn);
2304 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2305 req);
2306 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2307 break;
2308 case FSF_PORT_BOXED:
2309 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2310 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2311 ZFCP_STATUS_FSFREQ_RETRY;
2312 break;
2313 case FSF_LUN_BOXED:
2314 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2315 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2316 ZFCP_STATUS_FSFREQ_RETRY;
2317 break;
2318 case FSF_ADAPTER_STATUS_AVAILABLE:
2319 if (header->fsf_status_qual.word[0] ==
2320 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2321 zfcp_fc_test_link(unit->port);
2322 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2323 break;
2324 }
2325 skip_fsfstatus:
2326 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2327 zfcp_fsf_send_fcp_ctm_handler(req);
2328 else {
2329 zfcp_fsf_send_fcp_command_task_handler(req);
2330 req->unit = NULL;
2331 zfcp_unit_put(unit);
2332 }
2333 }
2334
2335 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2336 {
2337 u32 *fcp_dl_ptr;
2338
2339 /*
2340 * fcp_dl_addr = start address of fcp_cmnd structure +
2341 * size of fixed part + size of dynamically sized add_dcp_cdb field
2342 * SEE FCP-2 documentation
2343 */
2344 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2345 (fcp_cmd->add_fcp_cdb_length << 2));
2346 *fcp_dl_ptr = fcp_dl;
2347 }
2348
2349 /**
2350 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2351 * @unit: unit where command is sent to
2352 * @scsi_cmnd: scsi command to be sent
2353 */
2354 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2355 struct scsi_cmnd *scsi_cmnd)
2356 {
2357 struct zfcp_fsf_req *req;
2358 struct fcp_cmnd_iu *fcp_cmnd_iu;
2359 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2360 int real_bytes, retval = -EIO;
2361 struct zfcp_adapter *adapter = unit->port->adapter;
2362 struct zfcp_qdio *qdio = adapter->qdio;
2363
2364 if (unlikely(!(atomic_read(&unit->status) &
2365 ZFCP_STATUS_COMMON_UNBLOCKED)))
2366 return -EBUSY;
2367
2368 spin_lock(&qdio->req_q_lock);
2369 if (atomic_read(&qdio->req_q.count) <= 0) {
2370 atomic_inc(&qdio->req_q_full);
2371 goto out;
2372 }
2373
2374 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2375 adapter->pool.scsi_req);
2376
2377 if (IS_ERR(req)) {
2378 retval = PTR_ERR(req);
2379 goto out;
2380 }
2381
2382 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2383 zfcp_unit_get(unit);
2384 req->unit = unit;
2385 req->data = scsi_cmnd;
2386 req->handler = zfcp_fsf_send_fcp_command_handler;
2387 req->qtcb->header.lun_handle = unit->handle;
2388 req->qtcb->header.port_handle = unit->port->handle;
2389 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2390
2391 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2392
2393 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2394 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2395 /*
2396 * set depending on data direction:
2397 * data direction bits in SBALE (SB Type)
2398 * data direction bits in QTCB
2399 * data direction bits in FCP_CMND IU
2400 */
2401 switch (scsi_cmnd->sc_data_direction) {
2402 case DMA_NONE:
2403 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2404 break;
2405 case DMA_FROM_DEVICE:
2406 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2407 fcp_cmnd_iu->rddata = 1;
2408 break;
2409 case DMA_TO_DEVICE:
2410 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2411 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2412 fcp_cmnd_iu->wddata = 1;
2413 break;
2414 case DMA_BIDIRECTIONAL:
2415 goto failed_scsi_cmnd;
2416 }
2417
2418 if (likely((scsi_cmnd->device->simple_tags) ||
2419 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2420 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2421 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2422 else
2423 fcp_cmnd_iu->task_attribute = UNTAGGED;
2424
2425 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2426 fcp_cmnd_iu->add_fcp_cdb_length =
2427 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2428
2429 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2430
2431 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2432 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2433
2434 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2435 scsi_sglist(scsi_cmnd),
2436 FSF_MAX_SBALS_PER_REQ);
2437 if (unlikely(real_bytes < 0)) {
2438 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2439 dev_err(&adapter->ccw_device->dev,
2440 "Oversize data package, unit 0x%016Lx "
2441 "on port 0x%016Lx closed\n",
2442 (unsigned long long)unit->fcp_lun,
2443 (unsigned long long)unit->port->wwpn);
2444 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2445 retval = -EINVAL;
2446 }
2447 goto failed_scsi_cmnd;
2448 }
2449
2450 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2451
2452 retval = zfcp_fsf_req_send(req);
2453 if (unlikely(retval))
2454 goto failed_scsi_cmnd;
2455
2456 goto out;
2457
2458 failed_scsi_cmnd:
2459 zfcp_unit_put(unit);
2460 zfcp_fsf_req_free(req);
2461 scsi_cmnd->host_scribble = NULL;
2462 out:
2463 spin_unlock(&qdio->req_q_lock);
2464 return retval;
2465 }
2466
2467 /**
2468 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2469 * @unit: pointer to struct zfcp_unit
2470 * @tm_flags: unsigned byte for task management flags
2471 * Returns: on success pointer to struct fsf_req, NULL otherwise
2472 */
2473 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2474 {
2475 struct qdio_buffer_element *sbale;
2476 struct zfcp_fsf_req *req = NULL;
2477 struct fcp_cmnd_iu *fcp_cmnd_iu;
2478 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2479
2480 if (unlikely(!(atomic_read(&unit->status) &
2481 ZFCP_STATUS_COMMON_UNBLOCKED)))
2482 return NULL;
2483
2484 spin_lock_bh(&qdio->req_q_lock);
2485 if (zfcp_fsf_req_sbal_get(qdio))
2486 goto out;
2487
2488 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2489 qdio->adapter->pool.scsi_req);
2490
2491 if (IS_ERR(req)) {
2492 req = NULL;
2493 goto out;
2494 }
2495
2496 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2497 req->data = unit;
2498 req->handler = zfcp_fsf_send_fcp_command_handler;
2499 req->qtcb->header.lun_handle = unit->handle;
2500 req->qtcb->header.port_handle = unit->port->handle;
2501 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2502 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2503 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2504 sizeof(u32);
2505
2506 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2507 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2508 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2509
2510 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2511 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2512 fcp_cmnd_iu->task_management_flags = tm_flags;
2513
2514 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2515 if (!zfcp_fsf_req_send(req))
2516 goto out;
2517
2518 zfcp_fsf_req_free(req);
2519 req = NULL;
2520 out:
2521 spin_unlock_bh(&qdio->req_q_lock);
2522 return req;
2523 }
2524
2525 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2526 {
2527 }
2528
2529 /**
2530 * zfcp_fsf_control_file - control file upload/download
2531 * @adapter: pointer to struct zfcp_adapter
2532 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2533 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2534 */
2535 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2536 struct zfcp_fsf_cfdc *fsf_cfdc)
2537 {
2538 struct qdio_buffer_element *sbale;
2539 struct zfcp_qdio *qdio = adapter->qdio;
2540 struct zfcp_fsf_req *req = NULL;
2541 struct fsf_qtcb_bottom_support *bottom;
2542 int direction, retval = -EIO, bytes;
2543
2544 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2545 return ERR_PTR(-EOPNOTSUPP);
2546
2547 switch (fsf_cfdc->command) {
2548 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2549 direction = SBAL_FLAGS0_TYPE_WRITE;
2550 break;
2551 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2552 direction = SBAL_FLAGS0_TYPE_READ;
2553 break;
2554 default:
2555 return ERR_PTR(-EINVAL);
2556 }
2557
2558 spin_lock_bh(&qdio->req_q_lock);
2559 if (zfcp_fsf_req_sbal_get(qdio))
2560 goto out;
2561
2562 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2563 if (IS_ERR(req)) {
2564 retval = -EPERM;
2565 goto out;
2566 }
2567
2568 req->handler = zfcp_fsf_control_file_handler;
2569
2570 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2571 sbale[0].flags |= direction;
2572
2573 bottom = &req->qtcb->bottom.support;
2574 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2575 bottom->option = fsf_cfdc->option;
2576
2577 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2578 direction, fsf_cfdc->sg,
2579 FSF_MAX_SBALS_PER_REQ);
2580 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2581 zfcp_fsf_req_free(req);
2582 goto out;
2583 }
2584
2585 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2586 retval = zfcp_fsf_req_send(req);
2587 out:
2588 spin_unlock_bh(&qdio->req_q_lock);
2589
2590 if (!retval) {
2591 wait_for_completion(&req->completion);
2592 return req;
2593 }
2594 return ERR_PTR(retval);
2595 }
2596
2597 /**
2598 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2599 * @adapter: pointer to struct zfcp_adapter
2600 * @sbal_idx: response queue index of SBAL to be processed
2601 */
2602 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2603 {
2604 struct zfcp_adapter *adapter = qdio->adapter;
2605 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2606 struct qdio_buffer_element *sbale;
2607 struct zfcp_fsf_req *fsf_req;
2608 unsigned long flags, req_id;
2609 int idx;
2610
2611 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2612
2613 sbale = &sbal->element[idx];
2614 req_id = (unsigned long) sbale->addr;
2615 spin_lock_irqsave(&adapter->req_list_lock, flags);
2616 fsf_req = zfcp_reqlist_find(adapter, req_id);
2617
2618 if (!fsf_req)
2619 /*
2620 * Unknown request means that we have potentially memory
2621 * corruption and must stop the machine immediately.
2622 */
2623 panic("error: unknown req_id (%lx) on adapter %s.\n",
2624 req_id, dev_name(&adapter->ccw_device->dev));
2625
2626 list_del(&fsf_req->list);
2627 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2628
2629 fsf_req->queue_req.sbal_response = sbal_idx;
2630 fsf_req->queue_req.qdio_inb_usage =
2631 atomic_read(&qdio->resp_q.count);
2632 zfcp_fsf_req_complete(fsf_req);
2633
2634 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2635 break;
2636 }
2637 }
mm of the moment repository