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[SCSI] zfcp: Move WKA port to zfcp FC code
[linux-2.6-block.git] / drivers / s390 / scsi / zfcp_fsf.c
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CommitLineData
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 <scsi/fc/fc_els.h>
14#include "zfcp_ext.h"
15#include "zfcp_fc.h"
16#include "zfcp_dbf.h"
17
18static void zfcp_fsf_request_timeout_handler(unsigned long data)
19{
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
22 "fsrth_1", NULL);
23}
24
25static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
27{
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
32}
33
34static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
35{
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
41}
42
43/* association between FSF command and FSF QTCB type */
44static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
58};
59
60static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
61{
62 u16 subtable = table >> 16;
63 u16 rule = table & 0xffff;
64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
65
66 if (subtable && subtable < ARRAY_SIZE(act_type))
67 dev_warn(&adapter->ccw_device->dev,
68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
70}
71
72static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
74{
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
77 "Access denied to port 0x%016Lx\n",
78 (unsigned long long)port->wwpn);
79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
81 zfcp_erp_port_access_denied(port, "fspad_1", req);
82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
83}
84
85static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
87{
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97}
98
99static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
100{
101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
105}
106
107/**
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
110 */
111void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
112{
113 if (likely(req->pool)) {
114 if (likely(req->qtcb))
115 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
116 mempool_free(req, req->pool);
117 return;
118 }
119
120 if (likely(req->qtcb))
121 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
122 kfree(req);
123}
124
125static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
126{
127 unsigned long flags;
128 struct fsf_status_read_buffer *sr_buf = req->data;
129 struct zfcp_adapter *adapter = req->adapter;
130 struct zfcp_port *port;
131 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
132
133 read_lock_irqsave(&adapter->port_list_lock, flags);
134 list_for_each_entry(port, &adapter->port_list, list)
135 if (port->d_id == d_id) {
136 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
137 break;
138 }
139 read_unlock_irqrestore(&adapter->port_list_lock, flags);
140}
141
142static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
143 struct fsf_link_down_info *link_down)
144{
145 struct zfcp_adapter *adapter = req->adapter;
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 zfcp_scsi_schedule_rports_block(adapter);
153
154 if (!link_down)
155 goto out;
156
157 switch (link_down->error_code) {
158 case FSF_PSQ_LINK_NO_LIGHT:
159 dev_warn(&req->adapter->ccw_device->dev,
160 "There is no light signal from the local "
161 "fibre channel cable\n");
162 break;
163 case FSF_PSQ_LINK_WRAP_PLUG:
164 dev_warn(&req->adapter->ccw_device->dev,
165 "There is a wrap plug instead of a fibre "
166 "channel cable\n");
167 break;
168 case FSF_PSQ_LINK_NO_FCP:
169 dev_warn(&req->adapter->ccw_device->dev,
170 "The adjacent fibre channel node does not "
171 "support FCP\n");
172 break;
173 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
174 dev_warn(&req->adapter->ccw_device->dev,
175 "The FCP device is suspended because of a "
176 "firmware update\n");
177 break;
178 case FSF_PSQ_LINK_INVALID_WWPN:
179 dev_warn(&req->adapter->ccw_device->dev,
180 "The FCP device detected a WWPN that is "
181 "duplicate or not valid\n");
182 break;
183 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
184 dev_warn(&req->adapter->ccw_device->dev,
185 "The fibre channel fabric does not support NPIV\n");
186 break;
187 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
188 dev_warn(&req->adapter->ccw_device->dev,
189 "The FCP adapter cannot support more NPIV ports\n");
190 break;
191 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
192 dev_warn(&req->adapter->ccw_device->dev,
193 "The adjacent switch cannot support "
194 "more NPIV ports\n");
195 break;
196 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
197 dev_warn(&req->adapter->ccw_device->dev,
198 "The FCP adapter could not log in to the "
199 "fibre channel fabric\n");
200 break;
201 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
202 dev_warn(&req->adapter->ccw_device->dev,
203 "The WWPN assignment file on the FCP adapter "
204 "has been damaged\n");
205 break;
206 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
207 dev_warn(&req->adapter->ccw_device->dev,
208 "The mode table on the FCP adapter "
209 "has been damaged\n");
210 break;
211 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
212 dev_warn(&req->adapter->ccw_device->dev,
213 "All NPIV ports on the FCP adapter have "
214 "been assigned\n");
215 break;
216 default:
217 dev_warn(&req->adapter->ccw_device->dev,
218 "The link between the FCP adapter and "
219 "the FC fabric is down\n");
220 }
221out:
222 zfcp_erp_adapter_failed(adapter, id, req);
223}
224
225static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
226{
227 struct fsf_status_read_buffer *sr_buf = req->data;
228 struct fsf_link_down_info *ldi =
229 (struct fsf_link_down_info *) &sr_buf->payload;
230
231 switch (sr_buf->status_subtype) {
232 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
233 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
234 break;
235 case FSF_STATUS_READ_SUB_FDISC_FAILED:
236 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
237 break;
238 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
239 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
240 };
241}
242
243static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
244{
245 struct zfcp_adapter *adapter = req->adapter;
246 struct fsf_status_read_buffer *sr_buf = req->data;
247
248 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
249 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
250 mempool_free(sr_buf, adapter->pool.status_read_data);
251 zfcp_fsf_req_free(req);
252 return;
253 }
254
255 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
256
257 switch (sr_buf->status_type) {
258 case FSF_STATUS_READ_PORT_CLOSED:
259 zfcp_fsf_status_read_port_closed(req);
260 break;
261 case FSF_STATUS_READ_INCOMING_ELS:
262 zfcp_fc_incoming_els(req);
263 break;
264 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
265 break;
266 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
267 dev_warn(&adapter->ccw_device->dev,
268 "The error threshold for checksum statistics "
269 "has been exceeded\n");
270 zfcp_dbf_hba_berr(adapter->dbf, req);
271 break;
272 case FSF_STATUS_READ_LINK_DOWN:
273 zfcp_fsf_status_read_link_down(req);
274 break;
275 case FSF_STATUS_READ_LINK_UP:
276 dev_info(&adapter->ccw_device->dev,
277 "The local link has been restored\n");
278 /* All ports should be marked as ready to run again */
279 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
280 ZFCP_STATUS_COMMON_RUNNING,
281 ZFCP_SET);
282 zfcp_erp_adapter_reopen(adapter,
283 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
284 ZFCP_STATUS_COMMON_ERP_FAILED,
285 "fssrh_2", req);
286 break;
287 case FSF_STATUS_READ_NOTIFICATION_LOST:
288 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
289 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
290 req);
291 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
292 queue_work(adapter->work_queue, &adapter->scan_work);
293 break;
294 case FSF_STATUS_READ_CFDC_UPDATED:
295 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
296 break;
297 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
298 adapter->adapter_features = sr_buf->payload.word[0];
299 break;
300 }
301
302 mempool_free(sr_buf, adapter->pool.status_read_data);
303 zfcp_fsf_req_free(req);
304
305 atomic_inc(&adapter->stat_miss);
306 queue_work(adapter->work_queue, &adapter->stat_work);
307}
308
309static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
310{
311 switch (req->qtcb->header.fsf_status_qual.word[0]) {
312 case FSF_SQ_FCP_RSP_AVAILABLE:
313 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
314 case FSF_SQ_NO_RETRY_POSSIBLE:
315 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
316 return;
317 case FSF_SQ_COMMAND_ABORTED:
318 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
319 break;
320 case FSF_SQ_NO_RECOM:
321 dev_err(&req->adapter->ccw_device->dev,
322 "The FCP adapter reported a problem "
323 "that cannot be recovered\n");
324 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
325 break;
326 }
327 /* all non-return stats set FSFREQ_ERROR*/
328 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
329}
330
331static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
332{
333 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
334 return;
335
336 switch (req->qtcb->header.fsf_status) {
337 case FSF_UNKNOWN_COMMAND:
338 dev_err(&req->adapter->ccw_device->dev,
339 "The FCP adapter does not recognize the command 0x%x\n",
340 req->qtcb->header.fsf_command);
341 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
342 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
343 break;
344 case FSF_ADAPTER_STATUS_AVAILABLE:
345 zfcp_fsf_fsfstatus_qual_eval(req);
346 break;
347 }
348}
349
350static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
351{
352 struct zfcp_adapter *adapter = req->adapter;
353 struct fsf_qtcb *qtcb = req->qtcb;
354 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
355
356 zfcp_dbf_hba_fsf_response(req);
357
358 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
359 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
360 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
361 return;
362 }
363
364 switch (qtcb->prefix.prot_status) {
365 case FSF_PROT_GOOD:
366 case FSF_PROT_FSF_STATUS_PRESENTED:
367 return;
368 case FSF_PROT_QTCB_VERSION_ERROR:
369 dev_err(&adapter->ccw_device->dev,
370 "QTCB version 0x%x not supported by FCP adapter "
371 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
372 psq->word[0], psq->word[1]);
373 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
374 break;
375 case FSF_PROT_ERROR_STATE:
376 case FSF_PROT_SEQ_NUMB_ERROR:
377 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
378 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
379 break;
380 case FSF_PROT_UNSUPP_QTCB_TYPE:
381 dev_err(&adapter->ccw_device->dev,
382 "The QTCB type is not supported by the FCP adapter\n");
383 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
384 break;
385 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
386 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
387 &adapter->status);
388 break;
389 case FSF_PROT_DUPLICATE_REQUEST_ID:
390 dev_err(&adapter->ccw_device->dev,
391 "0x%Lx is an ambiguous request identifier\n",
392 (unsigned long long)qtcb->bottom.support.req_handle);
393 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
394 break;
395 case FSF_PROT_LINK_DOWN:
396 zfcp_fsf_link_down_info_eval(req, "fspse_5",
397 &psq->link_down_info);
398 /* FIXME: reopening adapter now? better wait for link up */
399 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
400 break;
401 case FSF_PROT_REEST_QUEUE:
402 /* All ports should be marked as ready to run again */
403 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
404 ZFCP_STATUS_COMMON_RUNNING,
405 ZFCP_SET);
406 zfcp_erp_adapter_reopen(adapter,
407 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
408 ZFCP_STATUS_COMMON_ERP_FAILED,
409 "fspse_8", req);
410 break;
411 default:
412 dev_err(&adapter->ccw_device->dev,
413 "0x%x is not a valid transfer protocol status\n",
414 qtcb->prefix.prot_status);
415 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
416 }
417 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
418}
419
420/**
421 * zfcp_fsf_req_complete - process completion of a FSF request
422 * @fsf_req: The FSF request that has been completed.
423 *
424 * When a request has been completed either from the FCP adapter,
425 * or it has been dismissed due to a queue shutdown, this function
426 * is called to process the completion status and trigger further
427 * events related to the FSF request.
428 */
429static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
430{
431 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
432 zfcp_fsf_status_read_handler(req);
433 return;
434 }
435
436 del_timer(&req->timer);
437 zfcp_fsf_protstatus_eval(req);
438 zfcp_fsf_fsfstatus_eval(req);
439 req->handler(req);
440
441 if (req->erp_action)
442 zfcp_erp_notify(req->erp_action, 0);
443
444 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
445 zfcp_fsf_req_free(req);
446 else
447 complete(&req->completion);
448}
449
450/**
451 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
452 * @adapter: pointer to struct zfcp_adapter
453 *
454 * Never ever call this without shutting down the adapter first.
455 * Otherwise the adapter would continue using and corrupting s390 storage.
456 * Included BUG_ON() call to ensure this is done.
457 * ERP is supposed to be the only user of this function.
458 */
459void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
460{
461 struct zfcp_fsf_req *req, *tmp;
462 unsigned long flags;
463 LIST_HEAD(remove_queue);
464 unsigned int i;
465
466 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
467 spin_lock_irqsave(&adapter->req_list_lock, flags);
468 for (i = 0; i < REQUEST_LIST_SIZE; i++)
469 list_splice_init(&adapter->req_list[i], &remove_queue);
470 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
471
472 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
473 list_del(&req->list);
474 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
475 zfcp_fsf_req_complete(req);
476 }
477}
478
479static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
480{
481 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
482 struct zfcp_adapter *adapter = req->adapter;
483 struct Scsi_Host *shost = adapter->scsi_host;
484 struct fc_els_flogi *nsp, *plogi;
485
486 /* adjust pointers for missing command code */
487 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
488 - sizeof(u32));
489 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
490 - sizeof(u32));
491
492 if (req->data)
493 memcpy(req->data, bottom, sizeof(*bottom));
494
495 fc_host_port_name(shost) = nsp->fl_wwpn;
496 fc_host_node_name(shost) = nsp->fl_wwnn;
497 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
498 fc_host_speed(shost) = bottom->fc_link_speed;
499 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
500
501 adapter->hydra_version = bottom->adapter_type;
502 adapter->timer_ticks = bottom->timer_interval;
503
504 if (fc_host_permanent_port_name(shost) == -1)
505 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
506
507 switch (bottom->fc_topology) {
508 case FSF_TOPO_P2P:
509 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
510 adapter->peer_wwpn = plogi->fl_wwpn;
511 adapter->peer_wwnn = plogi->fl_wwnn;
512 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
513 break;
514 case FSF_TOPO_FABRIC:
515 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
516 break;
517 case FSF_TOPO_AL:
518 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
519 /* fall through */
520 default:
521 dev_err(&adapter->ccw_device->dev,
522 "Unknown or unsupported arbitrated loop "
523 "fibre channel topology detected\n");
524 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
525 return -EIO;
526 }
527
528 return 0;
529}
530
531static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
532{
533 struct zfcp_adapter *adapter = req->adapter;
534 struct fsf_qtcb *qtcb = req->qtcb;
535 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
536 struct Scsi_Host *shost = adapter->scsi_host;
537
538 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
539 return;
540
541 adapter->fsf_lic_version = bottom->lic_version;
542 adapter->adapter_features = bottom->adapter_features;
543 adapter->connection_features = bottom->connection_features;
544 adapter->peer_wwpn = 0;
545 adapter->peer_wwnn = 0;
546 adapter->peer_d_id = 0;
547
548 switch (qtcb->header.fsf_status) {
549 case FSF_GOOD:
550 if (zfcp_fsf_exchange_config_evaluate(req))
551 return;
552
553 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
554 dev_err(&adapter->ccw_device->dev,
555 "FCP adapter maximum QTCB size (%d bytes) "
556 "is too small\n",
557 bottom->max_qtcb_size);
558 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
559 return;
560 }
561 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
562 &adapter->status);
563 break;
564 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
565 fc_host_node_name(shost) = 0;
566 fc_host_port_name(shost) = 0;
567 fc_host_port_id(shost) = 0;
568 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
569 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
570 adapter->hydra_version = 0;
571
572 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
573 &adapter->status);
574
575 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
576 &qtcb->header.fsf_status_qual.link_down_info);
577 break;
578 default:
579 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
580 return;
581 }
582
583 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
584 adapter->hardware_version = bottom->hardware_version;
585 memcpy(fc_host_serial_number(shost), bottom->serial_number,
586 min(FC_SERIAL_NUMBER_SIZE, 17));
587 EBCASC(fc_host_serial_number(shost),
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 }
590
591 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
592 dev_err(&adapter->ccw_device->dev,
593 "The FCP adapter only supports newer "
594 "control block versions\n");
595 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
596 return;
597 }
598 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
599 dev_err(&adapter->ccw_device->dev,
600 "The FCP adapter only supports older "
601 "control block versions\n");
602 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
603 }
604}
605
606static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
607{
608 struct zfcp_adapter *adapter = req->adapter;
609 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
610 struct Scsi_Host *shost = adapter->scsi_host;
611
612 if (req->data)
613 memcpy(req->data, bottom, sizeof(*bottom));
614
615 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
616 fc_host_permanent_port_name(shost) = bottom->wwpn;
617 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
618 } else
619 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
620 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
621 fc_host_supported_speeds(shost) = bottom->supported_speed;
622}
623
624static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
625{
626 struct fsf_qtcb *qtcb = req->qtcb;
627
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
629 return;
630
631 switch (qtcb->header.fsf_status) {
632 case FSF_GOOD:
633 zfcp_fsf_exchange_port_evaluate(req);
634 break;
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
637 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
638 &qtcb->header.fsf_status_qual.link_down_info);
639 break;
640 }
641}
642
643static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
644{
645 struct zfcp_qdio_queue *req_q = &qdio->req_q;
646
647 spin_lock_bh(&qdio->req_q_lock);
648 if (atomic_read(&req_q->count))
649 return 1;
650 spin_unlock_bh(&qdio->req_q_lock);
651 return 0;
652}
653
654static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
655{
656 struct zfcp_adapter *adapter = qdio->adapter;
657 long ret;
658
659 spin_unlock_bh(&qdio->req_q_lock);
660 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
661 zfcp_fsf_sbal_check(qdio), 5 * HZ);
662 if (ret > 0)
663 return 0;
664 if (!ret) {
665 atomic_inc(&qdio->req_q_full);
666 /* assume hanging outbound queue, try queue recovery */
667 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
668 }
669
670 spin_lock_bh(&qdio->req_q_lock);
671 return -EIO;
672}
673
674static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
675{
676 struct zfcp_fsf_req *req;
677
678 if (likely(pool))
679 req = mempool_alloc(pool, GFP_ATOMIC);
680 else
681 req = kmalloc(sizeof(*req), GFP_ATOMIC);
682
683 if (unlikely(!req))
684 return NULL;
685
686 memset(req, 0, sizeof(*req));
687 req->pool = pool;
688 return req;
689}
690
691static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
692{
693 struct fsf_qtcb *qtcb;
694
695 if (likely(pool))
696 qtcb = mempool_alloc(pool, GFP_ATOMIC);
697 else
698 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
699
700 if (unlikely(!qtcb))
701 return NULL;
702
703 memset(qtcb, 0, sizeof(*qtcb));
704 return qtcb;
705}
706
707static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
708 u32 fsf_cmd, mempool_t *pool)
709{
710 struct qdio_buffer_element *sbale;
711 struct zfcp_qdio_queue *req_q = &qdio->req_q;
712 struct zfcp_adapter *adapter = qdio->adapter;
713 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
714
715 if (unlikely(!req))
716 return ERR_PTR(-ENOMEM);
717
718 if (adapter->req_no == 0)
719 adapter->req_no++;
720
721 INIT_LIST_HEAD(&req->list);
722 init_timer(&req->timer);
723 init_completion(&req->completion);
724
725 req->adapter = adapter;
726 req->fsf_command = fsf_cmd;
727 req->req_id = adapter->req_no;
728 req->queue_req.sbal_number = 1;
729 req->queue_req.sbal_first = req_q->first;
730 req->queue_req.sbal_last = req_q->first;
731 req->queue_req.sbale_curr = 1;
732
733 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
734 sbale[0].addr = (void *) req->req_id;
735 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
736
737 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
738 if (likely(pool))
739 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
740 else
741 req->qtcb = zfcp_qtcb_alloc(NULL);
742
743 if (unlikely(!req->qtcb)) {
744 zfcp_fsf_req_free(req);
745 return ERR_PTR(-ENOMEM);
746 }
747
748 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
749 req->qtcb->prefix.req_id = req->req_id;
750 req->qtcb->prefix.ulp_info = 26;
751 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
752 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
753 req->qtcb->header.req_handle = req->req_id;
754 req->qtcb->header.fsf_command = req->fsf_command;
755 req->seq_no = adapter->fsf_req_seq_no;
756 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
757 sbale[1].addr = (void *) req->qtcb;
758 sbale[1].length = sizeof(struct fsf_qtcb);
759 }
760
761 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
762 zfcp_fsf_req_free(req);
763 return ERR_PTR(-EIO);
764 }
765
766 return req;
767}
768
769static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
770{
771 struct zfcp_adapter *adapter = req->adapter;
772 struct zfcp_qdio *qdio = adapter->qdio;
773 unsigned long flags;
774 int idx;
775 int with_qtcb = (req->qtcb != NULL);
776
777 /* put allocated FSF request into hash table */
778 spin_lock_irqsave(&adapter->req_list_lock, flags);
779 idx = zfcp_reqlist_hash(req->req_id);
780 list_add_tail(&req->list, &adapter->req_list[idx]);
781 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
782
783 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
784 req->issued = get_clock();
785 if (zfcp_qdio_send(qdio, &req->queue_req)) {
786 del_timer(&req->timer);
787 spin_lock_irqsave(&adapter->req_list_lock, flags);
788 /* lookup request again, list might have changed */
789 if (zfcp_reqlist_find_safe(adapter, req))
790 zfcp_reqlist_remove(adapter, req);
791 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
792 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
793 return -EIO;
794 }
795
796 /* Don't increase for unsolicited status */
797 if (with_qtcb)
798 adapter->fsf_req_seq_no++;
799 adapter->req_no++;
800
801 return 0;
802}
803
804/**
805 * zfcp_fsf_status_read - send status read request
806 * @adapter: pointer to struct zfcp_adapter
807 * @req_flags: request flags
808 * Returns: 0 on success, ERROR otherwise
809 */
810int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
811{
812 struct zfcp_adapter *adapter = qdio->adapter;
813 struct zfcp_fsf_req *req;
814 struct fsf_status_read_buffer *sr_buf;
815 struct qdio_buffer_element *sbale;
816 int retval = -EIO;
817
818 spin_lock_bh(&qdio->req_q_lock);
819 if (zfcp_fsf_req_sbal_get(qdio))
820 goto out;
821
822 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
823 adapter->pool.status_read_req);
824 if (IS_ERR(req)) {
825 retval = PTR_ERR(req);
826 goto out;
827 }
828
829 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
830 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
831 req->queue_req.sbale_curr = 2;
832
833 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
834 if (!sr_buf) {
835 retval = -ENOMEM;
836 goto failed_buf;
837 }
838 memset(sr_buf, 0, sizeof(*sr_buf));
839 req->data = sr_buf;
840 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
841 sbale->addr = (void *) sr_buf;
842 sbale->length = sizeof(*sr_buf);
843
844 retval = zfcp_fsf_req_send(req);
845 if (retval)
846 goto failed_req_send;
847
848 goto out;
849
850failed_req_send:
851 mempool_free(sr_buf, adapter->pool.status_read_data);
852failed_buf:
853 zfcp_fsf_req_free(req);
854 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
855out:
856 spin_unlock_bh(&qdio->req_q_lock);
857 return retval;
858}
859
860static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
861{
862 struct zfcp_unit *unit = req->data;
863 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
864
865 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
866 return;
867
868 switch (req->qtcb->header.fsf_status) {
869 case FSF_PORT_HANDLE_NOT_VALID:
870 if (fsq->word[0] == fsq->word[1]) {
871 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
872 "fsafch1", req);
873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
874 }
875 break;
876 case FSF_LUN_HANDLE_NOT_VALID:
877 if (fsq->word[0] == fsq->word[1]) {
878 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
879 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
880 }
881 break;
882 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
883 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
884 break;
885 case FSF_PORT_BOXED:
886 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
887 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
888 ZFCP_STATUS_FSFREQ_RETRY;
889 break;
890 case FSF_LUN_BOXED:
891 zfcp_erp_unit_boxed(unit, "fsafch4", req);
892 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
893 ZFCP_STATUS_FSFREQ_RETRY;
894 break;
895 case FSF_ADAPTER_STATUS_AVAILABLE:
896 switch (fsq->word[0]) {
897 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
898 zfcp_fc_test_link(unit->port);
899 /* fall through */
900 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
902 break;
903 }
904 break;
905 case FSF_GOOD:
906 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
907 break;
908 }
909}
910
911/**
912 * zfcp_fsf_abort_fcp_command - abort running SCSI command
913 * @old_req_id: unsigned long
914 * @unit: pointer to struct zfcp_unit
915 * Returns: pointer to struct zfcp_fsf_req
916 */
917
918struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
919 struct zfcp_unit *unit)
920{
921 struct qdio_buffer_element *sbale;
922 struct zfcp_fsf_req *req = NULL;
923 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
924
925 spin_lock_bh(&qdio->req_q_lock);
926 if (zfcp_fsf_req_sbal_get(qdio))
927 goto out;
928 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
929 qdio->adapter->pool.scsi_abort);
930 if (IS_ERR(req)) {
931 req = NULL;
932 goto out;
933 }
934
935 if (unlikely(!(atomic_read(&unit->status) &
936 ZFCP_STATUS_COMMON_UNBLOCKED)))
937 goto out_error_free;
938
939 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
942
943 req->data = unit;
944 req->handler = zfcp_fsf_abort_fcp_command_handler;
945 req->qtcb->header.lun_handle = unit->handle;
946 req->qtcb->header.port_handle = unit->port->handle;
947 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
948
949 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
950 if (!zfcp_fsf_req_send(req))
951 goto out;
952
953out_error_free:
954 zfcp_fsf_req_free(req);
955 req = NULL;
956out:
957 spin_unlock_bh(&qdio->req_q_lock);
958 return req;
959}
960
961static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
962{
963 struct zfcp_adapter *adapter = req->adapter;
964 struct zfcp_send_ct *send_ct = req->data;
965 struct fsf_qtcb_header *header = &req->qtcb->header;
966
967 send_ct->status = -EINVAL;
968
969 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
970 goto skip_fsfstatus;
971
972 switch (header->fsf_status) {
973 case FSF_GOOD:
974 zfcp_dbf_san_ct_response(req);
975 send_ct->status = 0;
976 break;
977 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
978 zfcp_fsf_class_not_supp(req);
979 break;
980 case FSF_ADAPTER_STATUS_AVAILABLE:
981 switch (header->fsf_status_qual.word[0]){
982 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
984 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
985 break;
986 }
987 break;
988 case FSF_ACCESS_DENIED:
989 break;
990 case FSF_PORT_BOXED:
991 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
992 ZFCP_STATUS_FSFREQ_RETRY;
993 break;
994 case FSF_PORT_HANDLE_NOT_VALID:
995 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
996 /* fall through */
997 case FSF_GENERIC_COMMAND_REJECTED:
998 case FSF_PAYLOAD_SIZE_MISMATCH:
999 case FSF_REQUEST_SIZE_TOO_LARGE:
1000 case FSF_RESPONSE_SIZE_TOO_LARGE:
1001 case FSF_SBAL_MISMATCH:
1002 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1003 break;
1004 }
1005
1006skip_fsfstatus:
1007 if (send_ct->handler)
1008 send_ct->handler(send_ct->handler_data);
1009}
1010
1011static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1012 struct scatterlist *sg_req,
1013 struct scatterlist *sg_resp)
1014{
1015 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1016 sbale[2].addr = sg_virt(sg_req);
1017 sbale[2].length = sg_req->length;
1018 sbale[3].addr = sg_virt(sg_resp);
1019 sbale[3].length = sg_resp->length;
1020 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1021}
1022
1023static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1024{
1025 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1026}
1027
1028static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1029 struct scatterlist *sg_req,
1030 struct scatterlist *sg_resp,
1031 int max_sbals)
1032{
1033 struct zfcp_adapter *adapter = req->adapter;
1034 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1035 &req->queue_req);
1036 u32 feat = adapter->adapter_features;
1037 int bytes;
1038
1039 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1040 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1041 return -EOPNOTSUPP;
1042
1043 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1044 return 0;
1045 }
1046
1047 /* use single, unchained SBAL if it can hold the request */
1048 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1049 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1050 return 0;
1051 }
1052
1053 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1054 SBAL_FLAGS0_TYPE_WRITE_READ,
1055 sg_req, max_sbals);
1056 if (bytes <= 0)
1057 return -EIO;
1058 req->qtcb->bottom.support.req_buf_length = bytes;
1059 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1060
1061 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1062 SBAL_FLAGS0_TYPE_WRITE_READ,
1063 sg_resp, max_sbals);
1064 req->qtcb->bottom.support.resp_buf_length = bytes;
1065 if (bytes <= 0)
1066 return -EIO;
1067
1068 return 0;
1069}
1070
1071static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1072 struct scatterlist *sg_req,
1073 struct scatterlist *sg_resp,
1074 int max_sbals)
1075{
1076 int ret;
1077 unsigned int fcp_chan_timeout;
1078
1079 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1080 if (ret)
1081 return ret;
1082
1083 /* common settings for ct/gs and els requests */
1084 fcp_chan_timeout = 2 * FC_DEF_R_A_TOV / 1000;
1085 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1086 req->qtcb->bottom.support.timeout = fcp_chan_timeout;
1087 zfcp_fsf_start_timer(req, (fcp_chan_timeout + 10) * HZ);
1088
1089 return 0;
1090}
1091
1092/**
1093 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1094 * @ct: pointer to struct zfcp_send_ct with data for request
1095 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1096 */
1097int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1098{
1099 struct zfcp_fc_wka_port *wka_port = ct->wka_port;
1100 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1101 struct zfcp_fsf_req *req;
1102 int ret = -EIO;
1103
1104 spin_lock_bh(&qdio->req_q_lock);
1105 if (zfcp_fsf_req_sbal_get(qdio))
1106 goto out;
1107
1108 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1109
1110 if (IS_ERR(req)) {
1111 ret = PTR_ERR(req);
1112 goto out;
1113 }
1114
1115 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1116 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1117 FSF_MAX_SBALS_PER_REQ);
1118 if (ret)
1119 goto failed_send;
1120
1121 req->handler = zfcp_fsf_send_ct_handler;
1122 req->qtcb->header.port_handle = wka_port->handle;
1123 req->data = ct;
1124
1125 zfcp_dbf_san_ct_request(req);
1126
1127 ret = zfcp_fsf_req_send(req);
1128 if (ret)
1129 goto failed_send;
1130
1131 goto out;
1132
1133failed_send:
1134 zfcp_fsf_req_free(req);
1135out:
1136 spin_unlock_bh(&qdio->req_q_lock);
1137 return ret;
1138}
1139
1140static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1141{
1142 struct zfcp_send_els *send_els = req->data;
1143 struct zfcp_port *port = send_els->port;
1144 struct fsf_qtcb_header *header = &req->qtcb->header;
1145
1146 send_els->status = -EINVAL;
1147
1148 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1149 goto skip_fsfstatus;
1150
1151 switch (header->fsf_status) {
1152 case FSF_GOOD:
1153 zfcp_dbf_san_els_response(req);
1154 send_els->status = 0;
1155 break;
1156 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1157 zfcp_fsf_class_not_supp(req);
1158 break;
1159 case FSF_ADAPTER_STATUS_AVAILABLE:
1160 switch (header->fsf_status_qual.word[0]){
1161 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1162 if (port && (send_els->ls_code != ELS_ADISC))
1163 zfcp_fc_test_link(port);
1164 /*fall through */
1165 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1166 case FSF_SQ_RETRY_IF_POSSIBLE:
1167 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1168 break;
1169 }
1170 break;
1171 case FSF_ELS_COMMAND_REJECTED:
1172 case FSF_PAYLOAD_SIZE_MISMATCH:
1173 case FSF_REQUEST_SIZE_TOO_LARGE:
1174 case FSF_RESPONSE_SIZE_TOO_LARGE:
1175 break;
1176 case FSF_ACCESS_DENIED:
1177 if (port)
1178 zfcp_fsf_access_denied_port(req, port);
1179 break;
1180 case FSF_SBAL_MISMATCH:
1181 /* should never occure, avoided in zfcp_fsf_send_els */
1182 /* fall through */
1183 default:
1184 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1185 break;
1186 }
1187skip_fsfstatus:
1188 if (send_els->handler)
1189 send_els->handler(send_els->handler_data);
1190}
1191
1192/**
1193 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1194 * @els: pointer to struct zfcp_send_els with data for the command
1195 */
1196int zfcp_fsf_send_els(struct zfcp_send_els *els)
1197{
1198 struct zfcp_fsf_req *req;
1199 struct zfcp_qdio *qdio = els->adapter->qdio;
1200 int ret = -EIO;
1201
1202 spin_lock_bh(&qdio->req_q_lock);
1203 if (zfcp_fsf_req_sbal_get(qdio))
1204 goto out;
1205
1206 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1207
1208 if (IS_ERR(req)) {
1209 ret = PTR_ERR(req);
1210 goto out;
1211 }
1212
1213 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1214 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
1215
1216 if (ret)
1217 goto failed_send;
1218
1219 req->qtcb->bottom.support.d_id = els->d_id;
1220 req->handler = zfcp_fsf_send_els_handler;
1221 req->data = els;
1222
1223 zfcp_dbf_san_els_request(req);
1224
1225 ret = zfcp_fsf_req_send(req);
1226 if (ret)
1227 goto failed_send;
1228
1229 goto out;
1230
1231failed_send:
1232 zfcp_fsf_req_free(req);
1233out:
1234 spin_unlock_bh(&qdio->req_q_lock);
1235 return ret;
1236}
1237
1238int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1239{
1240 struct qdio_buffer_element *sbale;
1241 struct zfcp_fsf_req *req;
1242 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1243 int retval = -EIO;
1244
1245 spin_lock_bh(&qdio->req_q_lock);
1246 if (zfcp_fsf_req_sbal_get(qdio))
1247 goto out;
1248
1249 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1250 qdio->adapter->pool.erp_req);
1251
1252 if (IS_ERR(req)) {
1253 retval = PTR_ERR(req);
1254 goto out;
1255 }
1256
1257 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1258 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1259 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1260 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1261
1262 req->qtcb->bottom.config.feature_selection =
1263 FSF_FEATURE_CFDC |
1264 FSF_FEATURE_LUN_SHARING |
1265 FSF_FEATURE_NOTIFICATION_LOST |
1266 FSF_FEATURE_UPDATE_ALERT;
1267 req->erp_action = erp_action;
1268 req->handler = zfcp_fsf_exchange_config_data_handler;
1269 erp_action->fsf_req = req;
1270
1271 zfcp_fsf_start_erp_timer(req);
1272 retval = zfcp_fsf_req_send(req);
1273 if (retval) {
1274 zfcp_fsf_req_free(req);
1275 erp_action->fsf_req = NULL;
1276 }
1277out:
1278 spin_unlock_bh(&qdio->req_q_lock);
1279 return retval;
1280}
1281
1282int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1283 struct fsf_qtcb_bottom_config *data)
1284{
1285 struct qdio_buffer_element *sbale;
1286 struct zfcp_fsf_req *req = NULL;
1287 int retval = -EIO;
1288
1289 spin_lock_bh(&qdio->req_q_lock);
1290 if (zfcp_fsf_req_sbal_get(qdio))
1291 goto out_unlock;
1292
1293 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1294
1295 if (IS_ERR(req)) {
1296 retval = PTR_ERR(req);
1297 goto out_unlock;
1298 }
1299
1300 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1301 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1302 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1303 req->handler = zfcp_fsf_exchange_config_data_handler;
1304
1305 req->qtcb->bottom.config.feature_selection =
1306 FSF_FEATURE_CFDC |
1307 FSF_FEATURE_LUN_SHARING |
1308 FSF_FEATURE_NOTIFICATION_LOST |
1309 FSF_FEATURE_UPDATE_ALERT;
1310
1311 if (data)
1312 req->data = data;
1313
1314 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1315 retval = zfcp_fsf_req_send(req);
1316 spin_unlock_bh(&qdio->req_q_lock);
1317 if (!retval)
1318 wait_for_completion(&req->completion);
1319
1320 zfcp_fsf_req_free(req);
1321 return retval;
1322
1323out_unlock:
1324 spin_unlock_bh(&qdio->req_q_lock);
1325 return retval;
1326}
1327
1328/**
1329 * zfcp_fsf_exchange_port_data - request information about local port
1330 * @erp_action: ERP action for the adapter for which port data is requested
1331 * Returns: 0 on success, error otherwise
1332 */
1333int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1334{
1335 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1336 struct qdio_buffer_element *sbale;
1337 struct zfcp_fsf_req *req;
1338 int retval = -EIO;
1339
1340 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1341 return -EOPNOTSUPP;
1342
1343 spin_lock_bh(&qdio->req_q_lock);
1344 if (zfcp_fsf_req_sbal_get(qdio))
1345 goto out;
1346
1347 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1348 qdio->adapter->pool.erp_req);
1349
1350 if (IS_ERR(req)) {
1351 retval = PTR_ERR(req);
1352 goto out;
1353 }
1354
1355 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1356 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1357 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1358 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1359
1360 req->handler = zfcp_fsf_exchange_port_data_handler;
1361 req->erp_action = erp_action;
1362 erp_action->fsf_req = req;
1363
1364 zfcp_fsf_start_erp_timer(req);
1365 retval = zfcp_fsf_req_send(req);
1366 if (retval) {
1367 zfcp_fsf_req_free(req);
1368 erp_action->fsf_req = NULL;
1369 }
1370out:
1371 spin_unlock_bh(&qdio->req_q_lock);
1372 return retval;
1373}
1374
1375/**
1376 * zfcp_fsf_exchange_port_data_sync - request information about local port
1377 * @qdio: pointer to struct zfcp_qdio
1378 * @data: pointer to struct fsf_qtcb_bottom_port
1379 * Returns: 0 on success, error otherwise
1380 */
1381int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1382 struct fsf_qtcb_bottom_port *data)
1383{
1384 struct qdio_buffer_element *sbale;
1385 struct zfcp_fsf_req *req = NULL;
1386 int retval = -EIO;
1387
1388 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1389 return -EOPNOTSUPP;
1390
1391 spin_lock_bh(&qdio->req_q_lock);
1392 if (zfcp_fsf_req_sbal_get(qdio))
1393 goto out_unlock;
1394
1395 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1396
1397 if (IS_ERR(req)) {
1398 retval = PTR_ERR(req);
1399 goto out_unlock;
1400 }
1401
1402 if (data)
1403 req->data = data;
1404
1405 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1406 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1407 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1408
1409 req->handler = zfcp_fsf_exchange_port_data_handler;
1410 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1411 retval = zfcp_fsf_req_send(req);
1412 spin_unlock_bh(&qdio->req_q_lock);
1413
1414 if (!retval)
1415 wait_for_completion(&req->completion);
1416
1417 zfcp_fsf_req_free(req);
1418
1419 return retval;
1420
1421out_unlock:
1422 spin_unlock_bh(&qdio->req_q_lock);
1423 return retval;
1424}
1425
1426static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1427{
1428 struct zfcp_port *port = req->data;
1429 struct fsf_qtcb_header *header = &req->qtcb->header;
1430 struct fc_els_flogi *plogi;
1431
1432 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1433 goto out;
1434
1435 switch (header->fsf_status) {
1436 case FSF_PORT_ALREADY_OPEN:
1437 break;
1438 case FSF_ACCESS_DENIED:
1439 zfcp_fsf_access_denied_port(req, port);
1440 break;
1441 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1442 dev_warn(&req->adapter->ccw_device->dev,
1443 "Not enough FCP adapter resources to open "
1444 "remote port 0x%016Lx\n",
1445 (unsigned long long)port->wwpn);
1446 zfcp_erp_port_failed(port, "fsoph_1", req);
1447 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1448 break;
1449 case FSF_ADAPTER_STATUS_AVAILABLE:
1450 switch (header->fsf_status_qual.word[0]) {
1451 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1452 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1453 case FSF_SQ_NO_RETRY_POSSIBLE:
1454 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1455 break;
1456 }
1457 break;
1458 case FSF_GOOD:
1459 port->handle = header->port_handle;
1460 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1461 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1462 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1463 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1464 &port->status);
1465 /* check whether D_ID has changed during open */
1466 /*
1467 * FIXME: This check is not airtight, as the FCP channel does
1468 * not monitor closures of target port connections caused on
1469 * the remote side. Thus, they might miss out on invalidating
1470 * locally cached WWPNs (and other N_Port parameters) of gone
1471 * target ports. So, our heroic attempt to make things safe
1472 * could be undermined by 'open port' response data tagged with
1473 * obsolete WWPNs. Another reason to monitor potential
1474 * connection closures ourself at least (by interpreting
1475 * incoming ELS' and unsolicited status). It just crosses my
1476 * mind that one should be able to cross-check by means of
1477 * another GID_PN straight after a port has been opened.
1478 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1479 */
1480 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1481 if (req->qtcb->bottom.support.els1_length >=
1482 FSF_PLOGI_MIN_LEN)
1483 zfcp_fc_plogi_evaluate(port, plogi);
1484 break;
1485 case FSF_UNKNOWN_OP_SUBTYPE:
1486 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1487 break;
1488 }
1489
1490out:
1491 put_device(&port->sysfs_device);
1492}
1493
1494/**
1495 * zfcp_fsf_open_port - create and send open port request
1496 * @erp_action: pointer to struct zfcp_erp_action
1497 * Returns: 0 on success, error otherwise
1498 */
1499int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1500{
1501 struct qdio_buffer_element *sbale;
1502 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1503 struct zfcp_port *port = erp_action->port;
1504 struct zfcp_fsf_req *req;
1505 int retval = -EIO;
1506
1507 spin_lock_bh(&qdio->req_q_lock);
1508 if (zfcp_fsf_req_sbal_get(qdio))
1509 goto out;
1510
1511 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1512 qdio->adapter->pool.erp_req);
1513
1514 if (IS_ERR(req)) {
1515 retval = PTR_ERR(req);
1516 goto out;
1517 }
1518
1519 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1520 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1521 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1522 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1523
1524 req->handler = zfcp_fsf_open_port_handler;
1525 req->qtcb->bottom.support.d_id = port->d_id;
1526 req->data = port;
1527 req->erp_action = erp_action;
1528 erp_action->fsf_req = req;
1529 get_device(&port->sysfs_device);
1530
1531 zfcp_fsf_start_erp_timer(req);
1532 retval = zfcp_fsf_req_send(req);
1533 if (retval) {
1534 zfcp_fsf_req_free(req);
1535 erp_action->fsf_req = NULL;
1536 put_device(&port->sysfs_device);
1537 }
1538out:
1539 spin_unlock_bh(&qdio->req_q_lock);
1540 return retval;
1541}
1542
1543static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1544{
1545 struct zfcp_port *port = req->data;
1546
1547 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1548 return;
1549
1550 switch (req->qtcb->header.fsf_status) {
1551 case FSF_PORT_HANDLE_NOT_VALID:
1552 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1553 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1554 break;
1555 case FSF_ADAPTER_STATUS_AVAILABLE:
1556 break;
1557 case FSF_GOOD:
1558 zfcp_erp_modify_port_status(port, "fscph_2", req,
1559 ZFCP_STATUS_COMMON_OPEN,
1560 ZFCP_CLEAR);
1561 break;
1562 }
1563}
1564
1565/**
1566 * zfcp_fsf_close_port - create and send close port request
1567 * @erp_action: pointer to struct zfcp_erp_action
1568 * Returns: 0 on success, error otherwise
1569 */
1570int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1571{
1572 struct qdio_buffer_element *sbale;
1573 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1574 struct zfcp_fsf_req *req;
1575 int retval = -EIO;
1576
1577 spin_lock_bh(&qdio->req_q_lock);
1578 if (zfcp_fsf_req_sbal_get(qdio))
1579 goto out;
1580
1581 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1582 qdio->adapter->pool.erp_req);
1583
1584 if (IS_ERR(req)) {
1585 retval = PTR_ERR(req);
1586 goto out;
1587 }
1588
1589 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1590 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1591 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1592 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1593
1594 req->handler = zfcp_fsf_close_port_handler;
1595 req->data = erp_action->port;
1596 req->erp_action = erp_action;
1597 req->qtcb->header.port_handle = erp_action->port->handle;
1598 erp_action->fsf_req = req;
1599
1600 zfcp_fsf_start_erp_timer(req);
1601 retval = zfcp_fsf_req_send(req);
1602 if (retval) {
1603 zfcp_fsf_req_free(req);
1604 erp_action->fsf_req = NULL;
1605 }
1606out:
1607 spin_unlock_bh(&qdio->req_q_lock);
1608 return retval;
1609}
1610
1611static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1612{
1613 struct zfcp_fc_wka_port *wka_port = req->data;
1614 struct fsf_qtcb_header *header = &req->qtcb->header;
1615
1616 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1617 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1618 goto out;
1619 }
1620
1621 switch (header->fsf_status) {
1622 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1623 dev_warn(&req->adapter->ccw_device->dev,
1624 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1625 /* fall through */
1626 case FSF_ADAPTER_STATUS_AVAILABLE:
1627 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1628 /* fall through */
1629 case FSF_ACCESS_DENIED:
1630 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1631 break;
1632 case FSF_GOOD:
1633 wka_port->handle = header->port_handle;
1634 /* fall through */
1635 case FSF_PORT_ALREADY_OPEN:
1636 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1637 }
1638out:
1639 wake_up(&wka_port->completion_wq);
1640}
1641
1642/**
1643 * zfcp_fsf_open_wka_port - create and send open wka-port request
1644 * @wka_port: pointer to struct zfcp_fc_wka_port
1645 * Returns: 0 on success, error otherwise
1646 */
1647int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1648{
1649 struct qdio_buffer_element *sbale;
1650 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1651 struct zfcp_fsf_req *req;
1652 int retval = -EIO;
1653
1654 spin_lock_bh(&qdio->req_q_lock);
1655 if (zfcp_fsf_req_sbal_get(qdio))
1656 goto out;
1657
1658 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1659 qdio->adapter->pool.erp_req);
1660
1661 if (unlikely(IS_ERR(req))) {
1662 retval = PTR_ERR(req);
1663 goto out;
1664 }
1665
1666 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1667 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1668 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1669 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1670
1671 req->handler = zfcp_fsf_open_wka_port_handler;
1672 req->qtcb->bottom.support.d_id = wka_port->d_id;
1673 req->data = wka_port;
1674
1675 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1676 retval = zfcp_fsf_req_send(req);
1677 if (retval)
1678 zfcp_fsf_req_free(req);
1679out:
1680 spin_unlock_bh(&qdio->req_q_lock);
1681 return retval;
1682}
1683
1684static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1685{
1686 struct zfcp_fc_wka_port *wka_port = req->data;
1687
1688 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1689 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1690 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1691 }
1692
1693 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1694 wake_up(&wka_port->completion_wq);
1695}
1696
1697/**
1698 * zfcp_fsf_close_wka_port - create and send close wka port request
1699 * @wka_port: WKA port to open
1700 * Returns: 0 on success, error otherwise
1701 */
1702int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1703{
1704 struct qdio_buffer_element *sbale;
1705 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1706 struct zfcp_fsf_req *req;
1707 int retval = -EIO;
1708
1709 spin_lock_bh(&qdio->req_q_lock);
1710 if (zfcp_fsf_req_sbal_get(qdio))
1711 goto out;
1712
1713 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1714 qdio->adapter->pool.erp_req);
1715
1716 if (unlikely(IS_ERR(req))) {
1717 retval = PTR_ERR(req);
1718 goto out;
1719 }
1720
1721 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1722 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1723 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1724 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1725
1726 req->handler = zfcp_fsf_close_wka_port_handler;
1727 req->data = wka_port;
1728 req->qtcb->header.port_handle = wka_port->handle;
1729
1730 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1731 retval = zfcp_fsf_req_send(req);
1732 if (retval)
1733 zfcp_fsf_req_free(req);
1734out:
1735 spin_unlock_bh(&qdio->req_q_lock);
1736 return retval;
1737}
1738
1739static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1740{
1741 struct zfcp_port *port = req->data;
1742 struct fsf_qtcb_header *header = &req->qtcb->header;
1743 struct zfcp_unit *unit;
1744
1745 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1746 return;
1747
1748 switch (header->fsf_status) {
1749 case FSF_PORT_HANDLE_NOT_VALID:
1750 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1751 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1752 break;
1753 case FSF_ACCESS_DENIED:
1754 zfcp_fsf_access_denied_port(req, port);
1755 break;
1756 case FSF_PORT_BOXED:
1757 /* can't use generic zfcp_erp_modify_port_status because
1758 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1759 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1760 read_lock(&port->unit_list_lock);
1761 list_for_each_entry(unit, &port->unit_list, list)
1762 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1763 &unit->status);
1764 read_unlock(&port->unit_list_lock);
1765 zfcp_erp_port_boxed(port, "fscpph2", req);
1766 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1767 ZFCP_STATUS_FSFREQ_RETRY;
1768
1769 break;
1770 case FSF_ADAPTER_STATUS_AVAILABLE:
1771 switch (header->fsf_status_qual.word[0]) {
1772 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1773 /* fall through */
1774 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1775 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1776 break;
1777 }
1778 break;
1779 case FSF_GOOD:
1780 /* can't use generic zfcp_erp_modify_port_status because
1781 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1782 */
1783 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1784 read_lock(&port->unit_list_lock);
1785 list_for_each_entry(unit, &port->unit_list, list)
1786 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1787 &unit->status);
1788 read_unlock(&port->unit_list_lock);
1789 break;
1790 }
1791}
1792
1793/**
1794 * zfcp_fsf_close_physical_port - close physical port
1795 * @erp_action: pointer to struct zfcp_erp_action
1796 * Returns: 0 on success
1797 */
1798int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1799{
1800 struct qdio_buffer_element *sbale;
1801 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1802 struct zfcp_fsf_req *req;
1803 int retval = -EIO;
1804
1805 spin_lock_bh(&qdio->req_q_lock);
1806 if (zfcp_fsf_req_sbal_get(qdio))
1807 goto out;
1808
1809 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1810 qdio->adapter->pool.erp_req);
1811
1812 if (IS_ERR(req)) {
1813 retval = PTR_ERR(req);
1814 goto out;
1815 }
1816
1817 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1818 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1819 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1820 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1821
1822 req->data = erp_action->port;
1823 req->qtcb->header.port_handle = erp_action->port->handle;
1824 req->erp_action = erp_action;
1825 req->handler = zfcp_fsf_close_physical_port_handler;
1826 erp_action->fsf_req = req;
1827
1828 zfcp_fsf_start_erp_timer(req);
1829 retval = zfcp_fsf_req_send(req);
1830 if (retval) {
1831 zfcp_fsf_req_free(req);
1832 erp_action->fsf_req = NULL;
1833 }
1834out:
1835 spin_unlock_bh(&qdio->req_q_lock);
1836 return retval;
1837}
1838
1839static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1840{
1841 struct zfcp_adapter *adapter = req->adapter;
1842 struct zfcp_unit *unit = req->data;
1843 struct fsf_qtcb_header *header = &req->qtcb->header;
1844 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1845 struct fsf_queue_designator *queue_designator =
1846 &header->fsf_status_qual.fsf_queue_designator;
1847 int exclusive, readwrite;
1848
1849 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1850 return;
1851
1852 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1853 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1854 ZFCP_STATUS_UNIT_SHARED |
1855 ZFCP_STATUS_UNIT_READONLY,
1856 &unit->status);
1857
1858 switch (header->fsf_status) {
1859
1860 case FSF_PORT_HANDLE_NOT_VALID:
1861 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1862 /* fall through */
1863 case FSF_LUN_ALREADY_OPEN:
1864 break;
1865 case FSF_ACCESS_DENIED:
1866 zfcp_fsf_access_denied_unit(req, unit);
1867 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1868 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1869 break;
1870 case FSF_PORT_BOXED:
1871 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1872 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1873 ZFCP_STATUS_FSFREQ_RETRY;
1874 break;
1875 case FSF_LUN_SHARING_VIOLATION:
1876 if (header->fsf_status_qual.word[0])
1877 dev_warn(&adapter->ccw_device->dev,
1878 "LUN 0x%Lx on port 0x%Lx is already in "
1879 "use by CSS%d, MIF Image ID %x\n",
1880 (unsigned long long)unit->fcp_lun,
1881 (unsigned long long)unit->port->wwpn,
1882 queue_designator->cssid,
1883 queue_designator->hla);
1884 else
1885 zfcp_act_eval_err(adapter,
1886 header->fsf_status_qual.word[2]);
1887 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1888 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1889 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1890 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1891 break;
1892 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1893 dev_warn(&adapter->ccw_device->dev,
1894 "No handle is available for LUN "
1895 "0x%016Lx on port 0x%016Lx\n",
1896 (unsigned long long)unit->fcp_lun,
1897 (unsigned long long)unit->port->wwpn);
1898 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1899 /* fall through */
1900 case FSF_INVALID_COMMAND_OPTION:
1901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902 break;
1903 case FSF_ADAPTER_STATUS_AVAILABLE:
1904 switch (header->fsf_status_qual.word[0]) {
1905 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1906 zfcp_fc_test_link(unit->port);
1907 /* fall through */
1908 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1909 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1910 break;
1911 }
1912 break;
1913
1914 case FSF_GOOD:
1915 unit->handle = header->lun_handle;
1916 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1917
1918 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1919 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1920 !zfcp_ccw_priv_sch(adapter)) {
1921 exclusive = (bottom->lun_access_info &
1922 FSF_UNIT_ACCESS_EXCLUSIVE);
1923 readwrite = (bottom->lun_access_info &
1924 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1925
1926 if (!exclusive)
1927 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1928 &unit->status);
1929
1930 if (!readwrite) {
1931 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1932 &unit->status);
1933 dev_info(&adapter->ccw_device->dev,
1934 "SCSI device at LUN 0x%016Lx on port "
1935 "0x%016Lx opened read-only\n",
1936 (unsigned long long)unit->fcp_lun,
1937 (unsigned long long)unit->port->wwpn);
1938 }
1939
1940 if (exclusive && !readwrite) {
1941 dev_err(&adapter->ccw_device->dev,
1942 "Exclusive read-only access not "
1943 "supported (unit 0x%016Lx, "
1944 "port 0x%016Lx)\n",
1945 (unsigned long long)unit->fcp_lun,
1946 (unsigned long long)unit->port->wwpn);
1947 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1948 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1949 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1950 } else if (!exclusive && readwrite) {
1951 dev_err(&adapter->ccw_device->dev,
1952 "Shared read-write access not "
1953 "supported (unit 0x%016Lx, port "
1954 "0x%016Lx)\n",
1955 (unsigned long long)unit->fcp_lun,
1956 (unsigned long long)unit->port->wwpn);
1957 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1958 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1959 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1960 }
1961 }
1962 break;
1963 }
1964}
1965
1966/**
1967 * zfcp_fsf_open_unit - open unit
1968 * @erp_action: pointer to struct zfcp_erp_action
1969 * Returns: 0 on success, error otherwise
1970 */
1971int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1972{
1973 struct qdio_buffer_element *sbale;
1974 struct zfcp_adapter *adapter = erp_action->adapter;
1975 struct zfcp_qdio *qdio = adapter->qdio;
1976 struct zfcp_fsf_req *req;
1977 int retval = -EIO;
1978
1979 spin_lock_bh(&qdio->req_q_lock);
1980 if (zfcp_fsf_req_sbal_get(qdio))
1981 goto out;
1982
1983 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1984 adapter->pool.erp_req);
1985
1986 if (IS_ERR(req)) {
1987 retval = PTR_ERR(req);
1988 goto out;
1989 }
1990
1991 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1992 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1993 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1994 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1995
1996 req->qtcb->header.port_handle = erp_action->port->handle;
1997 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1998 req->handler = zfcp_fsf_open_unit_handler;
1999 req->data = erp_action->unit;
2000 req->erp_action = erp_action;
2001 erp_action->fsf_req = req;
2002
2003 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2004 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2005
2006 zfcp_fsf_start_erp_timer(req);
2007 retval = zfcp_fsf_req_send(req);
2008 if (retval) {
2009 zfcp_fsf_req_free(req);
2010 erp_action->fsf_req = NULL;
2011 }
2012out:
2013 spin_unlock_bh(&qdio->req_q_lock);
2014 return retval;
2015}
2016
2017static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2018{
2019 struct zfcp_unit *unit = req->data;
2020
2021 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2022 return;
2023
2024 switch (req->qtcb->header.fsf_status) {
2025 case FSF_PORT_HANDLE_NOT_VALID:
2026 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2027 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2028 break;
2029 case FSF_LUN_HANDLE_NOT_VALID:
2030 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2032 break;
2033 case FSF_PORT_BOXED:
2034 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2035 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2036 ZFCP_STATUS_FSFREQ_RETRY;
2037 break;
2038 case FSF_ADAPTER_STATUS_AVAILABLE:
2039 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2040 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2041 zfcp_fc_test_link(unit->port);
2042 /* fall through */
2043 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2044 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2045 break;
2046 }
2047 break;
2048 case FSF_GOOD:
2049 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2050 break;
2051 }
2052}
2053
2054/**
2055 * zfcp_fsf_close_unit - close zfcp unit
2056 * @erp_action: pointer to struct zfcp_unit
2057 * Returns: 0 on success, error otherwise
2058 */
2059int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2060{
2061 struct qdio_buffer_element *sbale;
2062 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2063 struct zfcp_fsf_req *req;
2064 int retval = -EIO;
2065
2066 spin_lock_bh(&qdio->req_q_lock);
2067 if (zfcp_fsf_req_sbal_get(qdio))
2068 goto out;
2069
2070 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2071 qdio->adapter->pool.erp_req);
2072
2073 if (IS_ERR(req)) {
2074 retval = PTR_ERR(req);
2075 goto out;
2076 }
2077
2078 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2079 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2080 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2081 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2082
2083 req->qtcb->header.port_handle = erp_action->port->handle;
2084 req->qtcb->header.lun_handle = erp_action->unit->handle;
2085 req->handler = zfcp_fsf_close_unit_handler;
2086 req->data = erp_action->unit;
2087 req->erp_action = erp_action;
2088 erp_action->fsf_req = req;
2089
2090 zfcp_fsf_start_erp_timer(req);
2091 retval = zfcp_fsf_req_send(req);
2092 if (retval) {
2093 zfcp_fsf_req_free(req);
2094 erp_action->fsf_req = NULL;
2095 }
2096out:
2097 spin_unlock_bh(&qdio->req_q_lock);
2098 return retval;
2099}
2100
2101static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2102{
2103 lat_rec->sum += lat;
2104 lat_rec->min = min(lat_rec->min, lat);
2105 lat_rec->max = max(lat_rec->max, lat);
2106}
2107
2108static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2109{
2110 struct fsf_qual_latency_info *lat_in;
2111 struct latency_cont *lat = NULL;
2112 struct zfcp_unit *unit = req->unit;
2113 struct zfcp_blk_drv_data blktrc;
2114 int ticks = req->adapter->timer_ticks;
2115
2116 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2117
2118 blktrc.flags = 0;
2119 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2120 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2121 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2122 blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2123 blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2124
2125 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2126 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2127 blktrc.channel_lat = lat_in->channel_lat * ticks;
2128 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2129
2130 switch (req->qtcb->bottom.io.data_direction) {
2131 case FSF_DATADIR_READ:
2132 lat = &unit->latencies.read;
2133 break;
2134 case FSF_DATADIR_WRITE:
2135 lat = &unit->latencies.write;
2136 break;
2137 case FSF_DATADIR_CMND:
2138 lat = &unit->latencies.cmd;
2139 break;
2140 }
2141
2142 if (lat) {
2143 spin_lock(&unit->latencies.lock);
2144 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2145 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2146 lat->counter++;
2147 spin_unlock(&unit->latencies.lock);
2148 }
2149 }
2150
2151 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2152 sizeof(blktrc));
2153}
2154
2155static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2156{
2157 struct scsi_cmnd *scpnt;
2158 struct fcp_resp_with_ext *fcp_rsp;
2159 unsigned long flags;
2160
2161 read_lock_irqsave(&req->adapter->abort_lock, flags);
2162
2163 scpnt = req->data;
2164 if (unlikely(!scpnt)) {
2165 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2166 return;
2167 }
2168
2169 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2170 set_host_byte(scpnt, DID_SOFT_ERROR);
2171 goto skip_fsfstatus;
2172 }
2173
2174 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2175 set_host_byte(scpnt, DID_ERROR);
2176 goto skip_fsfstatus;
2177 }
2178
2179 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2180 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2181
2182 zfcp_fsf_req_trace(req, scpnt);
2183
2184skip_fsfstatus:
2185 if (scpnt->result != 0)
2186 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2187 else if (scpnt->retries > 0)
2188 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2189 else
2190 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2191
2192 scpnt->host_scribble = NULL;
2193 (scpnt->scsi_done) (scpnt);
2194 /*
2195 * We must hold this lock until scsi_done has been called.
2196 * Otherwise we may call scsi_done after abort regarding this
2197 * command has completed.
2198 * Note: scsi_done must not block!
2199 */
2200 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2201}
2202
2203static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2204{
2205 struct fcp_resp_with_ext *fcp_rsp;
2206 struct fcp_resp_rsp_info *rsp_info;
2207
2208 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2209 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2210
2211 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2212 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2213 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2214}
2215
2216
2217static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2218{
2219 struct zfcp_unit *unit;
2220 struct fsf_qtcb_header *header = &req->qtcb->header;
2221
2222 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2223 unit = req->data;
2224 else
2225 unit = req->unit;
2226
2227 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2228 goto skip_fsfstatus;
2229
2230 switch (header->fsf_status) {
2231 case FSF_HANDLE_MISMATCH:
2232 case FSF_PORT_HANDLE_NOT_VALID:
2233 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2234 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2235 break;
2236 case FSF_FCPLUN_NOT_VALID:
2237 case FSF_LUN_HANDLE_NOT_VALID:
2238 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2239 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2240 break;
2241 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2242 zfcp_fsf_class_not_supp(req);
2243 break;
2244 case FSF_ACCESS_DENIED:
2245 zfcp_fsf_access_denied_unit(req, unit);
2246 break;
2247 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2248 dev_err(&req->adapter->ccw_device->dev,
2249 "Incorrect direction %d, unit 0x%016Lx on port "
2250 "0x%016Lx closed\n",
2251 req->qtcb->bottom.io.data_direction,
2252 (unsigned long long)unit->fcp_lun,
2253 (unsigned long long)unit->port->wwpn);
2254 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2255 req);
2256 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2257 break;
2258 case FSF_CMND_LENGTH_NOT_VALID:
2259 dev_err(&req->adapter->ccw_device->dev,
2260 "Incorrect CDB length %d, unit 0x%016Lx on "
2261 "port 0x%016Lx closed\n",
2262 req->qtcb->bottom.io.fcp_cmnd_length,
2263 (unsigned long long)unit->fcp_lun,
2264 (unsigned long long)unit->port->wwpn);
2265 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2266 req);
2267 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2268 break;
2269 case FSF_PORT_BOXED:
2270 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2271 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2272 ZFCP_STATUS_FSFREQ_RETRY;
2273 break;
2274 case FSF_LUN_BOXED:
2275 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2277 ZFCP_STATUS_FSFREQ_RETRY;
2278 break;
2279 case FSF_ADAPTER_STATUS_AVAILABLE:
2280 if (header->fsf_status_qual.word[0] ==
2281 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2282 zfcp_fc_test_link(unit->port);
2283 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2284 break;
2285 }
2286skip_fsfstatus:
2287 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2288 zfcp_fsf_send_fcp_ctm_handler(req);
2289 else {
2290 zfcp_fsf_send_fcp_command_task_handler(req);
2291 req->unit = NULL;
2292 put_device(&unit->sysfs_device);
2293 }
2294}
2295
2296/**
2297 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2298 * @unit: unit where command is sent to
2299 * @scsi_cmnd: scsi command to be sent
2300 */
2301int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2302 struct scsi_cmnd *scsi_cmnd)
2303{
2304 struct zfcp_fsf_req *req;
2305 struct fcp_cmnd *fcp_cmnd;
2306 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2307 int real_bytes, retval = -EIO;
2308 struct zfcp_adapter *adapter = unit->port->adapter;
2309 struct zfcp_qdio *qdio = adapter->qdio;
2310
2311 if (unlikely(!(atomic_read(&unit->status) &
2312 ZFCP_STATUS_COMMON_UNBLOCKED)))
2313 return -EBUSY;
2314
2315 spin_lock(&qdio->req_q_lock);
2316 if (atomic_read(&qdio->req_q.count) <= 0) {
2317 atomic_inc(&qdio->req_q_full);
2318 goto out;
2319 }
2320
2321 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2322 adapter->pool.scsi_req);
2323
2324 if (IS_ERR(req)) {
2325 retval = PTR_ERR(req);
2326 goto out;
2327 }
2328
2329 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2330 get_device(&unit->sysfs_device);
2331 req->unit = unit;
2332 req->data = scsi_cmnd;
2333 req->handler = zfcp_fsf_send_fcp_command_handler;
2334 req->qtcb->header.lun_handle = unit->handle;
2335 req->qtcb->header.port_handle = unit->port->handle;
2336 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2337 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2338
2339 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2340
2341 /*
2342 * set depending on data direction:
2343 * data direction bits in SBALE (SB Type)
2344 * data direction bits in QTCB
2345 */
2346 switch (scsi_cmnd->sc_data_direction) {
2347 case DMA_NONE:
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349 break;
2350 case DMA_FROM_DEVICE:
2351 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2352 break;
2353 case DMA_TO_DEVICE:
2354 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2355 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2356 break;
2357 case DMA_BIDIRECTIONAL:
2358 goto failed_scsi_cmnd;
2359 }
2360
2361 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2362 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2363
2364 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2365 scsi_sglist(scsi_cmnd),
2366 FSF_MAX_SBALS_PER_REQ);
2367 if (unlikely(real_bytes < 0)) {
2368 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2369 dev_err(&adapter->ccw_device->dev,
2370 "Oversize data package, unit 0x%016Lx "
2371 "on port 0x%016Lx closed\n",
2372 (unsigned long long)unit->fcp_lun,
2373 (unsigned long long)unit->port->wwpn);
2374 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2375 retval = -EINVAL;
2376 }
2377 goto failed_scsi_cmnd;
2378 }
2379
2380 retval = zfcp_fsf_req_send(req);
2381 if (unlikely(retval))
2382 goto failed_scsi_cmnd;
2383
2384 goto out;
2385
2386failed_scsi_cmnd:
2387 put_device(&unit->sysfs_device);
2388 zfcp_fsf_req_free(req);
2389 scsi_cmnd->host_scribble = NULL;
2390out:
2391 spin_unlock(&qdio->req_q_lock);
2392 return retval;
2393}
2394
2395/**
2396 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2397 * @unit: pointer to struct zfcp_unit
2398 * @tm_flags: unsigned byte for task management flags
2399 * Returns: on success pointer to struct fsf_req, NULL otherwise
2400 */
2401struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2402{
2403 struct qdio_buffer_element *sbale;
2404 struct zfcp_fsf_req *req = NULL;
2405 struct fcp_cmnd *fcp_cmnd;
2406 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2407
2408 if (unlikely(!(atomic_read(&unit->status) &
2409 ZFCP_STATUS_COMMON_UNBLOCKED)))
2410 return NULL;
2411
2412 spin_lock_bh(&qdio->req_q_lock);
2413 if (zfcp_fsf_req_sbal_get(qdio))
2414 goto out;
2415
2416 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2417 qdio->adapter->pool.scsi_req);
2418
2419 if (IS_ERR(req)) {
2420 req = NULL;
2421 goto out;
2422 }
2423
2424 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2425 req->data = unit;
2426 req->handler = zfcp_fsf_send_fcp_command_handler;
2427 req->qtcb->header.lun_handle = unit->handle;
2428 req->qtcb->header.port_handle = unit->port->handle;
2429 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2430 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2431 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2432
2433 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2434 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2435 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2436
2437 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2438 zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2439
2440 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2441 if (!zfcp_fsf_req_send(req))
2442 goto out;
2443
2444 zfcp_fsf_req_free(req);
2445 req = NULL;
2446out:
2447 spin_unlock_bh(&qdio->req_q_lock);
2448 return req;
2449}
2450
2451static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2452{
2453}
2454
2455/**
2456 * zfcp_fsf_control_file - control file upload/download
2457 * @adapter: pointer to struct zfcp_adapter
2458 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2459 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2460 */
2461struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2462 struct zfcp_fsf_cfdc *fsf_cfdc)
2463{
2464 struct qdio_buffer_element *sbale;
2465 struct zfcp_qdio *qdio = adapter->qdio;
2466 struct zfcp_fsf_req *req = NULL;
2467 struct fsf_qtcb_bottom_support *bottom;
2468 int direction, retval = -EIO, bytes;
2469
2470 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2471 return ERR_PTR(-EOPNOTSUPP);
2472
2473 switch (fsf_cfdc->command) {
2474 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2475 direction = SBAL_FLAGS0_TYPE_WRITE;
2476 break;
2477 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2478 direction = SBAL_FLAGS0_TYPE_READ;
2479 break;
2480 default:
2481 return ERR_PTR(-EINVAL);
2482 }
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_cfdc->command, NULL);
2489 if (IS_ERR(req)) {
2490 retval = -EPERM;
2491 goto out;
2492 }
2493
2494 req->handler = zfcp_fsf_control_file_handler;
2495
2496 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2497 sbale[0].flags |= direction;
2498
2499 bottom = &req->qtcb->bottom.support;
2500 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2501 bottom->option = fsf_cfdc->option;
2502
2503 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2504 direction, fsf_cfdc->sg,
2505 FSF_MAX_SBALS_PER_REQ);
2506 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2507 zfcp_fsf_req_free(req);
2508 goto out;
2509 }
2510
2511 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2512 retval = zfcp_fsf_req_send(req);
2513out:
2514 spin_unlock_bh(&qdio->req_q_lock);
2515
2516 if (!retval) {
2517 wait_for_completion(&req->completion);
2518 return req;
2519 }
2520 return ERR_PTR(retval);
2521}
2522
2523/**
2524 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2525 * @adapter: pointer to struct zfcp_adapter
2526 * @sbal_idx: response queue index of SBAL to be processed
2527 */
2528void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2529{
2530 struct zfcp_adapter *adapter = qdio->adapter;
2531 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2532 struct qdio_buffer_element *sbale;
2533 struct zfcp_fsf_req *fsf_req;
2534 unsigned long flags, req_id;
2535 int idx;
2536
2537 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2538
2539 sbale = &sbal->element[idx];
2540 req_id = (unsigned long) sbale->addr;
2541 spin_lock_irqsave(&adapter->req_list_lock, flags);
2542 fsf_req = zfcp_reqlist_find(adapter, req_id);
2543
2544 if (!fsf_req)
2545 /*
2546 * Unknown request means that we have potentially memory
2547 * corruption and must stop the machine immediately.
2548 */
2549 panic("error: unknown req_id (%lx) on adapter %s.\n",
2550 req_id, dev_name(&adapter->ccw_device->dev));
2551
2552 list_del(&fsf_req->list);
2553 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2554
2555 fsf_req->queue_req.sbal_response = sbal_idx;
2556 fsf_req->queue_req.qdio_inb_usage =
2557 atomic_read(&qdio->resp_q.count);
2558 zfcp_fsf_req_complete(fsf_req);
2559
2560 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2561 break;
2562 }
2563}
Linux 6.x block layer and io_uring tree(s)