[SCSI] zfcp: Rename sysfs_device attribute to dev in zfcp_unit and zfcp_port
[linux-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2  * zfcp device driver
3  *
4  * Implementation of FSF commands.
5  *
6  * Copyright IBM Corporation 2002, 2010
7  */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <scsi/fc/fc_els.h>
14 #include "zfcp_ext.h"
15 #include "zfcp_fc.h"
16 #include "zfcp_dbf.h"
17 #include "zfcp_reqlist.h"
18
19 static void zfcp_fsf_request_timeout_handler(unsigned long data)
20 {
21         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
22         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
23                                 "fsrth_1", NULL);
24 }
25
26 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
27                                  unsigned long timeout)
28 {
29         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
30         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
31         fsf_req->timer.expires = jiffies + timeout;
32         add_timer(&fsf_req->timer);
33 }
34
35 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
36 {
37         BUG_ON(!fsf_req->erp_action);
38         fsf_req->timer.function = zfcp_erp_timeout_handler;
39         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
40         fsf_req->timer.expires = jiffies + 30 * HZ;
41         add_timer(&fsf_req->timer);
42 }
43
44 /* association between FSF command and FSF QTCB type */
45 static u32 fsf_qtcb_type[] = {
46         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
47         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
48         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
49         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
50         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
51         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
52         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
53         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
54         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
55         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
56         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
57         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
58         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
59 };
60
61 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
62 {
63         u16 subtable = table >> 16;
64         u16 rule = table & 0xffff;
65         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
66
67         if (subtable && subtable < ARRAY_SIZE(act_type))
68                 dev_warn(&adapter->ccw_device->dev,
69                          "Access denied according to ACT rule type %s, "
70                          "rule %d\n", act_type[subtable], rule);
71 }
72
73 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
74                                         struct zfcp_port *port)
75 {
76         struct fsf_qtcb_header *header = &req->qtcb->header;
77         dev_warn(&req->adapter->ccw_device->dev,
78                  "Access denied to port 0x%016Lx\n",
79                  (unsigned long long)port->wwpn);
80         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
81         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
82         zfcp_erp_port_access_denied(port, "fspad_1", req);
83         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
84 }
85
86 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
87                                         struct zfcp_unit *unit)
88 {
89         struct fsf_qtcb_header *header = &req->qtcb->header;
90         dev_warn(&req->adapter->ccw_device->dev,
91                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
92                  (unsigned long long)unit->fcp_lun,
93                  (unsigned long long)unit->port->wwpn);
94         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
95         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
96         zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
97         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
98 }
99
100 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
101 {
102         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
103                 "operational because of an unsupported FC class\n");
104         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
105         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
106 }
107
108 /**
109  * zfcp_fsf_req_free - free memory used by fsf request
110  * @fsf_req: pointer to struct zfcp_fsf_req
111  */
112 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
113 {
114         if (likely(req->pool)) {
115                 if (likely(req->qtcb))
116                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
117                 mempool_free(req, req->pool);
118                 return;
119         }
120
121         if (likely(req->qtcb))
122                 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
123         kfree(req);
124 }
125
126 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
127 {
128         unsigned long flags;
129         struct fsf_status_read_buffer *sr_buf = req->data;
130         struct zfcp_adapter *adapter = req->adapter;
131         struct zfcp_port *port;
132         int d_id = ntoh24(sr_buf->d_id);
133
134         read_lock_irqsave(&adapter->port_list_lock, flags);
135         list_for_each_entry(port, &adapter->port_list, list)
136                 if (port->d_id == d_id) {
137                         zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
138                         break;
139                 }
140         read_unlock_irqrestore(&adapter->port_list_lock, flags);
141 }
142
143 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
144                                          struct fsf_link_down_info *link_down)
145 {
146         struct zfcp_adapter *adapter = req->adapter;
147
148         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
149                 return;
150
151         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
152
153         zfcp_scsi_schedule_rports_block(adapter);
154
155         if (!link_down)
156                 goto out;
157
158         switch (link_down->error_code) {
159         case FSF_PSQ_LINK_NO_LIGHT:
160                 dev_warn(&req->adapter->ccw_device->dev,
161                          "There is no light signal from the local "
162                          "fibre channel cable\n");
163                 break;
164         case FSF_PSQ_LINK_WRAP_PLUG:
165                 dev_warn(&req->adapter->ccw_device->dev,
166                          "There is a wrap plug instead of a fibre "
167                          "channel cable\n");
168                 break;
169         case FSF_PSQ_LINK_NO_FCP:
170                 dev_warn(&req->adapter->ccw_device->dev,
171                          "The adjacent fibre channel node does not "
172                          "support FCP\n");
173                 break;
174         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
175                 dev_warn(&req->adapter->ccw_device->dev,
176                          "The FCP device is suspended because of a "
177                          "firmware update\n");
178                 break;
179         case FSF_PSQ_LINK_INVALID_WWPN:
180                 dev_warn(&req->adapter->ccw_device->dev,
181                          "The FCP device detected a WWPN that is "
182                          "duplicate or not valid\n");
183                 break;
184         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
185                 dev_warn(&req->adapter->ccw_device->dev,
186                          "The fibre channel fabric does not support NPIV\n");
187                 break;
188         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
189                 dev_warn(&req->adapter->ccw_device->dev,
190                          "The FCP adapter cannot support more NPIV ports\n");
191                 break;
192         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
193                 dev_warn(&req->adapter->ccw_device->dev,
194                          "The adjacent switch cannot support "
195                          "more NPIV ports\n");
196                 break;
197         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
198                 dev_warn(&req->adapter->ccw_device->dev,
199                          "The FCP adapter could not log in to the "
200                          "fibre channel fabric\n");
201                 break;
202         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
203                 dev_warn(&req->adapter->ccw_device->dev,
204                          "The WWPN assignment file on the FCP adapter "
205                          "has been damaged\n");
206                 break;
207         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
208                 dev_warn(&req->adapter->ccw_device->dev,
209                          "The mode table on the FCP adapter "
210                          "has been damaged\n");
211                 break;
212         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
213                 dev_warn(&req->adapter->ccw_device->dev,
214                          "All NPIV ports on the FCP adapter have "
215                          "been assigned\n");
216                 break;
217         default:
218                 dev_warn(&req->adapter->ccw_device->dev,
219                          "The link between the FCP adapter and "
220                          "the FC fabric is down\n");
221         }
222 out:
223         zfcp_erp_adapter_failed(adapter, id, req);
224 }
225
226 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
227 {
228         struct fsf_status_read_buffer *sr_buf = req->data;
229         struct fsf_link_down_info *ldi =
230                 (struct fsf_link_down_info *) &sr_buf->payload;
231
232         switch (sr_buf->status_subtype) {
233         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
234                 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
235                 break;
236         case FSF_STATUS_READ_SUB_FDISC_FAILED:
237                 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
238                 break;
239         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
240                 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
241         };
242 }
243
244 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
245 {
246         struct zfcp_adapter *adapter = req->adapter;
247         struct fsf_status_read_buffer *sr_buf = req->data;
248
249         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
250                 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
251                 mempool_free(sr_buf, adapter->pool.status_read_data);
252                 zfcp_fsf_req_free(req);
253                 return;
254         }
255
256         zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
257
258         switch (sr_buf->status_type) {
259         case FSF_STATUS_READ_PORT_CLOSED:
260                 zfcp_fsf_status_read_port_closed(req);
261                 break;
262         case FSF_STATUS_READ_INCOMING_ELS:
263                 zfcp_fc_incoming_els(req);
264                 break;
265         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
266                 break;
267         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
268                 dev_warn(&adapter->ccw_device->dev,
269                          "The error threshold for checksum statistics "
270                          "has been exceeded\n");
271                 zfcp_dbf_hba_berr(adapter->dbf, req);
272                 break;
273         case FSF_STATUS_READ_LINK_DOWN:
274                 zfcp_fsf_status_read_link_down(req);
275                 break;
276         case FSF_STATUS_READ_LINK_UP:
277                 dev_info(&adapter->ccw_device->dev,
278                          "The local link has been restored\n");
279                 /* All ports should be marked as ready to run again */
280                 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
281                                                ZFCP_STATUS_COMMON_RUNNING,
282                                                ZFCP_SET);
283                 zfcp_erp_adapter_reopen(adapter,
284                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
285                                         ZFCP_STATUS_COMMON_ERP_FAILED,
286                                         "fssrh_2", req);
287                 break;
288         case FSF_STATUS_READ_NOTIFICATION_LOST:
289                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
290                         zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
291                                                         req);
292                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
293                         queue_work(adapter->work_queue, &adapter->scan_work);
294                 break;
295         case FSF_STATUS_READ_CFDC_UPDATED:
296                 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
297                 break;
298         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
299                 adapter->adapter_features = sr_buf->payload.word[0];
300                 break;
301         }
302
303         mempool_free(sr_buf, adapter->pool.status_read_data);
304         zfcp_fsf_req_free(req);
305
306         atomic_inc(&adapter->stat_miss);
307         queue_work(adapter->work_queue, &adapter->stat_work);
308 }
309
310 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
311 {
312         switch (req->qtcb->header.fsf_status_qual.word[0]) {
313         case FSF_SQ_FCP_RSP_AVAILABLE:
314         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
315         case FSF_SQ_NO_RETRY_POSSIBLE:
316         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
317                 return;
318         case FSF_SQ_COMMAND_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
331 static 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
350 static 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                 return;
361         }
362
363         switch (qtcb->prefix.prot_status) {
364         case FSF_PROT_GOOD:
365         case FSF_PROT_FSF_STATUS_PRESENTED:
366                 return;
367         case FSF_PROT_QTCB_VERSION_ERROR:
368                 dev_err(&adapter->ccw_device->dev,
369                         "QTCB version 0x%x not supported by FCP adapter "
370                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
371                         psq->word[0], psq->word[1]);
372                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
373                 break;
374         case FSF_PROT_ERROR_STATE:
375         case FSF_PROT_SEQ_NUMB_ERROR:
376                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
377                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
378                 break;
379         case FSF_PROT_UNSUPP_QTCB_TYPE:
380                 dev_err(&adapter->ccw_device->dev,
381                         "The QTCB type is not supported by the FCP adapter\n");
382                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
383                 break;
384         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
385                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
386                                 &adapter->status);
387                 break;
388         case FSF_PROT_DUPLICATE_REQUEST_ID:
389                 dev_err(&adapter->ccw_device->dev,
390                         "0x%Lx is an ambiguous request identifier\n",
391                         (unsigned long long)qtcb->bottom.support.req_handle);
392                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
393                 break;
394         case FSF_PROT_LINK_DOWN:
395                 zfcp_fsf_link_down_info_eval(req, "fspse_5",
396                                              &psq->link_down_info);
397                 /* go through reopen to flush pending requests */
398                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
399                 break;
400         case FSF_PROT_REEST_QUEUE:
401                 /* All ports should be marked as ready to run again */
402                 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
403                                                ZFCP_STATUS_COMMON_RUNNING,
404                                                ZFCP_SET);
405                 zfcp_erp_adapter_reopen(adapter,
406                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
407                                         ZFCP_STATUS_COMMON_ERP_FAILED,
408                                         "fspse_8", req);
409                 break;
410         default:
411                 dev_err(&adapter->ccw_device->dev,
412                         "0x%x is not a valid transfer protocol status\n",
413                         qtcb->prefix.prot_status);
414                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
415         }
416         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
417 }
418
419 /**
420  * zfcp_fsf_req_complete - process completion of a FSF request
421  * @fsf_req: The FSF request that has been completed.
422  *
423  * When a request has been completed either from the FCP adapter,
424  * or it has been dismissed due to a queue shutdown, this function
425  * is called to process the completion status and trigger further
426  * events related to the FSF request.
427  */
428 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
429 {
430         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
431                 zfcp_fsf_status_read_handler(req);
432                 return;
433         }
434
435         del_timer(&req->timer);
436         zfcp_fsf_protstatus_eval(req);
437         zfcp_fsf_fsfstatus_eval(req);
438         req->handler(req);
439
440         if (req->erp_action)
441                 zfcp_erp_notify(req->erp_action, 0);
442
443         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
444                 zfcp_fsf_req_free(req);
445         else
446                 complete(&req->completion);
447 }
448
449 /**
450  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
451  * @adapter: pointer to struct zfcp_adapter
452  *
453  * Never ever call this without shutting down the adapter first.
454  * Otherwise the adapter would continue using and corrupting s390 storage.
455  * Included BUG_ON() call to ensure this is done.
456  * ERP is supposed to be the only user of this function.
457  */
458 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
459 {
460         struct zfcp_fsf_req *req, *tmp;
461         LIST_HEAD(remove_queue);
462
463         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
464         zfcp_reqlist_move(adapter->req_list, &remove_queue);
465
466         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
467                 list_del(&req->list);
468                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
469                 zfcp_fsf_req_complete(req);
470         }
471 }
472
473 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
474 {
475         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
476         struct zfcp_adapter *adapter = req->adapter;
477         struct Scsi_Host *shost = adapter->scsi_host;
478         struct fc_els_flogi *nsp, *plogi;
479
480         /* adjust pointers for missing command code */
481         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
482                                         - sizeof(u32));
483         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
484                                         - sizeof(u32));
485
486         if (req->data)
487                 memcpy(req->data, bottom, sizeof(*bottom));
488
489         fc_host_port_name(shost) = nsp->fl_wwpn;
490         fc_host_node_name(shost) = nsp->fl_wwnn;
491         fc_host_port_id(shost) = ntoh24(bottom->s_id);
492         fc_host_speed(shost) = bottom->fc_link_speed;
493         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
494         fc_host_supported_fc4s(shost)[2] = 1; /* FCP */
495         fc_host_active_fc4s(shost)[2] = 1; /* FCP */
496
497         adapter->hydra_version = bottom->adapter_type;
498         adapter->timer_ticks = bottom->timer_interval;
499
500         if (fc_host_permanent_port_name(shost) == -1)
501                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
502
503         switch (bottom->fc_topology) {
504         case FSF_TOPO_P2P:
505                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
506                 adapter->peer_wwpn = plogi->fl_wwpn;
507                 adapter->peer_wwnn = plogi->fl_wwnn;
508                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
509                 break;
510         case FSF_TOPO_FABRIC:
511                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
512                 break;
513         case FSF_TOPO_AL:
514                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
515                 /* fall through */
516         default:
517                 dev_err(&adapter->ccw_device->dev,
518                         "Unknown or unsupported arbitrated loop "
519                         "fibre channel topology detected\n");
520                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
521                 return -EIO;
522         }
523
524         return 0;
525 }
526
527 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
528 {
529         struct zfcp_adapter *adapter = req->adapter;
530         struct fsf_qtcb *qtcb = req->qtcb;
531         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
532         struct Scsi_Host *shost = adapter->scsi_host;
533
534         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
535                 return;
536
537         adapter->fsf_lic_version = bottom->lic_version;
538         adapter->adapter_features = bottom->adapter_features;
539         adapter->connection_features = bottom->connection_features;
540         adapter->peer_wwpn = 0;
541         adapter->peer_wwnn = 0;
542         adapter->peer_d_id = 0;
543
544         switch (qtcb->header.fsf_status) {
545         case FSF_GOOD:
546                 if (zfcp_fsf_exchange_config_evaluate(req))
547                         return;
548
549                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
550                         dev_err(&adapter->ccw_device->dev,
551                                 "FCP adapter maximum QTCB size (%d bytes) "
552                                 "is too small\n",
553                                 bottom->max_qtcb_size);
554                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
555                         return;
556                 }
557                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
558                                 &adapter->status);
559                 break;
560         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
561                 fc_host_node_name(shost) = 0;
562                 fc_host_port_name(shost) = 0;
563                 fc_host_port_id(shost) = 0;
564                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
565                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
566                 adapter->hydra_version = 0;
567
568                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
569                                 &adapter->status);
570
571                 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
572                         &qtcb->header.fsf_status_qual.link_down_info);
573                 break;
574         default:
575                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
576                 return;
577         }
578
579         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
580                 adapter->hardware_version = bottom->hardware_version;
581                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
582                        min(FC_SERIAL_NUMBER_SIZE, 17));
583                 EBCASC(fc_host_serial_number(shost),
584                        min(FC_SERIAL_NUMBER_SIZE, 17));
585         }
586
587         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
588                 dev_err(&adapter->ccw_device->dev,
589                         "The FCP adapter only supports newer "
590                         "control block versions\n");
591                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
592                 return;
593         }
594         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
595                 dev_err(&adapter->ccw_device->dev,
596                         "The FCP adapter only supports older "
597                         "control block versions\n");
598                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
599         }
600 }
601
602 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
603 {
604         struct zfcp_adapter *adapter = req->adapter;
605         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
606         struct Scsi_Host *shost = adapter->scsi_host;
607
608         if (req->data)
609                 memcpy(req->data, bottom, sizeof(*bottom));
610
611         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
612                 fc_host_permanent_port_name(shost) = bottom->wwpn;
613                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
614         } else
615                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
616         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
617         fc_host_supported_speeds(shost) = bottom->supported_speed;
618 }
619
620 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
621 {
622         struct fsf_qtcb *qtcb = req->qtcb;
623
624         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
625                 return;
626
627         switch (qtcb->header.fsf_status) {
628         case FSF_GOOD:
629                 zfcp_fsf_exchange_port_evaluate(req);
630                 break;
631         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
632                 zfcp_fsf_exchange_port_evaluate(req);
633                 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
634                         &qtcb->header.fsf_status_qual.link_down_info);
635                 break;
636         }
637 }
638
639 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
640 {
641         struct zfcp_qdio_queue *req_q = &qdio->req_q;
642
643         spin_lock_bh(&qdio->req_q_lock);
644         if (atomic_read(&req_q->count))
645                 return 1;
646         spin_unlock_bh(&qdio->req_q_lock);
647         return 0;
648 }
649
650 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
651 {
652         struct zfcp_adapter *adapter = qdio->adapter;
653         long ret;
654
655         spin_unlock_bh(&qdio->req_q_lock);
656         ret = wait_event_interruptible_timeout(qdio->req_q_wq,
657                                zfcp_fsf_sbal_check(qdio), 5 * HZ);
658         if (ret > 0)
659                 return 0;
660         if (!ret) {
661                 atomic_inc(&qdio->req_q_full);
662                 /* assume hanging outbound queue, try queue recovery */
663                 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
664         }
665
666         spin_lock_bh(&qdio->req_q_lock);
667         return -EIO;
668 }
669
670 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
671 {
672         struct zfcp_fsf_req *req;
673
674         if (likely(pool))
675                 req = mempool_alloc(pool, GFP_ATOMIC);
676         else
677                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
678
679         if (unlikely(!req))
680                 return NULL;
681
682         memset(req, 0, sizeof(*req));
683         req->pool = pool;
684         return req;
685 }
686
687 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
688 {
689         struct fsf_qtcb *qtcb;
690
691         if (likely(pool))
692                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
693         else
694                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
695
696         if (unlikely(!qtcb))
697                 return NULL;
698
699         memset(qtcb, 0, sizeof(*qtcb));
700         return qtcb;
701 }
702
703 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
704                                                 u32 fsf_cmd, mempool_t *pool)
705 {
706         struct qdio_buffer_element *sbale;
707         struct zfcp_qdio_queue *req_q = &qdio->req_q;
708         struct zfcp_adapter *adapter = qdio->adapter;
709         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
710
711         if (unlikely(!req))
712                 return ERR_PTR(-ENOMEM);
713
714         if (adapter->req_no == 0)
715                 adapter->req_no++;
716
717         INIT_LIST_HEAD(&req->list);
718         init_timer(&req->timer);
719         init_completion(&req->completion);
720
721         req->adapter = adapter;
722         req->fsf_command = fsf_cmd;
723         req->req_id = adapter->req_no;
724         req->queue_req.sbal_number = 1;
725         req->queue_req.sbal_first = req_q->first;
726         req->queue_req.sbal_last = req_q->first;
727         req->queue_req.sbale_curr = 1;
728
729         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
730         sbale[0].addr = (void *) req->req_id;
731         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
732
733         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
734                 if (likely(pool))
735                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
736                 else
737                         req->qtcb = zfcp_qtcb_alloc(NULL);
738
739                 if (unlikely(!req->qtcb)) {
740                         zfcp_fsf_req_free(req);
741                         return ERR_PTR(-ENOMEM);
742                 }
743
744                 req->seq_no = adapter->fsf_req_seq_no;
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                 sbale[1].addr = (void *) req->qtcb;
753                 sbale[1].length = sizeof(struct fsf_qtcb);
754         }
755
756         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
757                 zfcp_fsf_req_free(req);
758                 return ERR_PTR(-EIO);
759         }
760
761         return req;
762 }
763
764 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
765 {
766         struct zfcp_adapter *adapter = req->adapter;
767         struct zfcp_qdio *qdio = adapter->qdio;
768         int with_qtcb = (req->qtcb != NULL);
769         int req_id = req->req_id;
770
771         zfcp_reqlist_add(adapter->req_list, req);
772
773         req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
774         req->issued = get_clock();
775         if (zfcp_qdio_send(qdio, &req->queue_req)) {
776                 del_timer(&req->timer);
777                 /* lookup request again, list might have changed */
778                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
779                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
780                 return -EIO;
781         }
782
783         /* Don't increase for unsolicited status */
784         if (with_qtcb)
785                 adapter->fsf_req_seq_no++;
786         adapter->req_no++;
787
788         return 0;
789 }
790
791 /**
792  * zfcp_fsf_status_read - send status read request
793  * @adapter: pointer to struct zfcp_adapter
794  * @req_flags: request flags
795  * Returns: 0 on success, ERROR otherwise
796  */
797 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
798 {
799         struct zfcp_adapter *adapter = qdio->adapter;
800         struct zfcp_fsf_req *req;
801         struct fsf_status_read_buffer *sr_buf;
802         struct qdio_buffer_element *sbale;
803         int retval = -EIO;
804
805         spin_lock_bh(&qdio->req_q_lock);
806         if (zfcp_fsf_req_sbal_get(qdio))
807                 goto out;
808
809         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
810                                   adapter->pool.status_read_req);
811         if (IS_ERR(req)) {
812                 retval = PTR_ERR(req);
813                 goto out;
814         }
815
816         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
817         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
818         req->queue_req.sbale_curr = 2;
819
820         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
821         if (!sr_buf) {
822                 retval = -ENOMEM;
823                 goto failed_buf;
824         }
825         memset(sr_buf, 0, sizeof(*sr_buf));
826         req->data = sr_buf;
827         sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
828         sbale->addr = (void *) sr_buf;
829         sbale->length = sizeof(*sr_buf);
830
831         retval = zfcp_fsf_req_send(req);
832         if (retval)
833                 goto failed_req_send;
834
835         goto out;
836
837 failed_req_send:
838         mempool_free(sr_buf, adapter->pool.status_read_data);
839 failed_buf:
840         zfcp_fsf_req_free(req);
841         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
842 out:
843         spin_unlock_bh(&qdio->req_q_lock);
844         return retval;
845 }
846
847 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
848 {
849         struct zfcp_unit *unit = req->data;
850         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
851
852         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
853                 return;
854
855         switch (req->qtcb->header.fsf_status) {
856         case FSF_PORT_HANDLE_NOT_VALID:
857                 if (fsq->word[0] == fsq->word[1]) {
858                         zfcp_erp_adapter_reopen(unit->port->adapter, 0,
859                                                 "fsafch1", req);
860                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
861                 }
862                 break;
863         case FSF_LUN_HANDLE_NOT_VALID:
864                 if (fsq->word[0] == fsq->word[1]) {
865                         zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
866                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
867                 }
868                 break;
869         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
870                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
871                 break;
872         case FSF_PORT_BOXED:
873                 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
874                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
875                 break;
876         case FSF_LUN_BOXED:
877                 zfcp_erp_unit_boxed(unit, "fsafch4", req);
878                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
879                 break;
880         case FSF_ADAPTER_STATUS_AVAILABLE:
881                 switch (fsq->word[0]) {
882                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
883                         zfcp_fc_test_link(unit->port);
884                         /* fall through */
885                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
886                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
887                         break;
888                 }
889                 break;
890         case FSF_GOOD:
891                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
892                 break;
893         }
894 }
895
896 /**
897  * zfcp_fsf_abort_fcp_command - abort running SCSI command
898  * @old_req_id: unsigned long
899  * @unit: pointer to struct zfcp_unit
900  * Returns: pointer to struct zfcp_fsf_req
901  */
902
903 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
904                                                 struct zfcp_unit *unit)
905 {
906         struct qdio_buffer_element *sbale;
907         struct zfcp_fsf_req *req = NULL;
908         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
909
910         spin_lock_bh(&qdio->req_q_lock);
911         if (zfcp_fsf_req_sbal_get(qdio))
912                 goto out;
913         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
914                                   qdio->adapter->pool.scsi_abort);
915         if (IS_ERR(req)) {
916                 req = NULL;
917                 goto out;
918         }
919
920         if (unlikely(!(atomic_read(&unit->status) &
921                        ZFCP_STATUS_COMMON_UNBLOCKED)))
922                 goto out_error_free;
923
924         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
925         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
926         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
927
928         req->data = unit;
929         req->handler = zfcp_fsf_abort_fcp_command_handler;
930         req->qtcb->header.lun_handle = unit->handle;
931         req->qtcb->header.port_handle = unit->port->handle;
932         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
933
934         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
935         if (!zfcp_fsf_req_send(req))
936                 goto out;
937
938 out_error_free:
939         zfcp_fsf_req_free(req);
940         req = NULL;
941 out:
942         spin_unlock_bh(&qdio->req_q_lock);
943         return req;
944 }
945
946 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
947 {
948         struct zfcp_adapter *adapter = req->adapter;
949         struct zfcp_fsf_ct_els *ct = req->data;
950         struct fsf_qtcb_header *header = &req->qtcb->header;
951
952         ct->status = -EINVAL;
953
954         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
955                 goto skip_fsfstatus;
956
957         switch (header->fsf_status) {
958         case FSF_GOOD:
959                 zfcp_dbf_san_ct_response(req);
960                 ct->status = 0;
961                 break;
962         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
963                 zfcp_fsf_class_not_supp(req);
964                 break;
965         case FSF_ADAPTER_STATUS_AVAILABLE:
966                 switch (header->fsf_status_qual.word[0]){
967                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
968                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
969                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
970                         break;
971                 }
972                 break;
973         case FSF_ACCESS_DENIED:
974                 break;
975         case FSF_PORT_BOXED:
976                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
977                 break;
978         case FSF_PORT_HANDLE_NOT_VALID:
979                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
980                 /* fall through */
981         case FSF_GENERIC_COMMAND_REJECTED:
982         case FSF_PAYLOAD_SIZE_MISMATCH:
983         case FSF_REQUEST_SIZE_TOO_LARGE:
984         case FSF_RESPONSE_SIZE_TOO_LARGE:
985         case FSF_SBAL_MISMATCH:
986                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
987                 break;
988         }
989
990 skip_fsfstatus:
991         if (ct->handler)
992                 ct->handler(ct->handler_data);
993 }
994
995 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
996                                             struct scatterlist *sg_req,
997                                             struct scatterlist *sg_resp)
998 {
999         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1000         sbale[2].addr   = sg_virt(sg_req);
1001         sbale[2].length = sg_req->length;
1002         sbale[3].addr   = sg_virt(sg_resp);
1003         sbale[3].length = sg_resp->length;
1004         sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1005 }
1006
1007 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1008 {
1009         return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1010 }
1011
1012 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1013                                        struct scatterlist *sg_req,
1014                                        struct scatterlist *sg_resp,
1015                                        int max_sbals)
1016 {
1017         struct zfcp_adapter *adapter = req->adapter;
1018         struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1019                                                                &req->queue_req);
1020         u32 feat = adapter->adapter_features;
1021         int bytes;
1022
1023         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1024                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1025                         return -EOPNOTSUPP;
1026
1027                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1028                 return 0;
1029         }
1030
1031         /* use single, unchained SBAL if it can hold the request */
1032         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1033                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1034                 return 0;
1035         }
1036
1037         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1038                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1039                                         sg_req, max_sbals);
1040         if (bytes <= 0)
1041                 return -EIO;
1042         req->qtcb->bottom.support.req_buf_length = bytes;
1043         req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1044
1045         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1046                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1047                                         sg_resp, max_sbals);
1048         req->qtcb->bottom.support.resp_buf_length = bytes;
1049         if (bytes <= 0)
1050                 return -EIO;
1051
1052         return 0;
1053 }
1054
1055 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1056                                  struct scatterlist *sg_req,
1057                                  struct scatterlist *sg_resp,
1058                                  int max_sbals, unsigned int timeout)
1059 {
1060         int ret;
1061
1062         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1063         if (ret)
1064                 return ret;
1065
1066         /* common settings for ct/gs and els requests */
1067         if (timeout > 255)
1068                 timeout = 255; /* max value accepted by hardware */
1069         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1070         req->qtcb->bottom.support.timeout = timeout;
1071         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1072
1073         return 0;
1074 }
1075
1076 /**
1077  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1078  * @ct: pointer to struct zfcp_send_ct with data for request
1079  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1080  */
1081 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1082                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1083                      unsigned int timeout)
1084 {
1085         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1086         struct zfcp_fsf_req *req;
1087         int ret = -EIO;
1088
1089         spin_lock_bh(&qdio->req_q_lock);
1090         if (zfcp_fsf_req_sbal_get(qdio))
1091                 goto out;
1092
1093         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1094
1095         if (IS_ERR(req)) {
1096                 ret = PTR_ERR(req);
1097                 goto out;
1098         }
1099
1100         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1101         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1102                                     FSF_MAX_SBALS_PER_REQ, timeout);
1103         if (ret)
1104                 goto failed_send;
1105
1106         req->handler = zfcp_fsf_send_ct_handler;
1107         req->qtcb->header.port_handle = wka_port->handle;
1108         req->data = ct;
1109
1110         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1111
1112         ret = zfcp_fsf_req_send(req);
1113         if (ret)
1114                 goto failed_send;
1115
1116         goto out;
1117
1118 failed_send:
1119         zfcp_fsf_req_free(req);
1120 out:
1121         spin_unlock_bh(&qdio->req_q_lock);
1122         return ret;
1123 }
1124
1125 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1126 {
1127         struct zfcp_fsf_ct_els *send_els = req->data;
1128         struct zfcp_port *port = send_els->port;
1129         struct fsf_qtcb_header *header = &req->qtcb->header;
1130
1131         send_els->status = -EINVAL;
1132
1133         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1134                 goto skip_fsfstatus;
1135
1136         switch (header->fsf_status) {
1137         case FSF_GOOD:
1138                 zfcp_dbf_san_els_response(req);
1139                 send_els->status = 0;
1140                 break;
1141         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1142                 zfcp_fsf_class_not_supp(req);
1143                 break;
1144         case FSF_ADAPTER_STATUS_AVAILABLE:
1145                 switch (header->fsf_status_qual.word[0]){
1146                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1147                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1148                 case FSF_SQ_RETRY_IF_POSSIBLE:
1149                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1150                         break;
1151                 }
1152                 break;
1153         case FSF_ELS_COMMAND_REJECTED:
1154         case FSF_PAYLOAD_SIZE_MISMATCH:
1155         case FSF_REQUEST_SIZE_TOO_LARGE:
1156         case FSF_RESPONSE_SIZE_TOO_LARGE:
1157                 break;
1158         case FSF_ACCESS_DENIED:
1159                 if (port)
1160                         zfcp_fsf_access_denied_port(req, port);
1161                 break;
1162         case FSF_SBAL_MISMATCH:
1163                 /* should never occure, avoided in zfcp_fsf_send_els */
1164                 /* fall through */
1165         default:
1166                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1167                 break;
1168         }
1169 skip_fsfstatus:
1170         if (send_els->handler)
1171                 send_els->handler(send_els->handler_data);
1172 }
1173
1174 /**
1175  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1176  * @els: pointer to struct zfcp_send_els with data for the command
1177  */
1178 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1179                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1180 {
1181         struct zfcp_fsf_req *req;
1182         struct zfcp_qdio *qdio = adapter->qdio;
1183         int ret = -EIO;
1184
1185         spin_lock_bh(&qdio->req_q_lock);
1186         if (zfcp_fsf_req_sbal_get(qdio))
1187                 goto out;
1188
1189         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1190
1191         if (IS_ERR(req)) {
1192                 ret = PTR_ERR(req);
1193                 goto out;
1194         }
1195
1196         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1197         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout);
1198
1199         if (ret)
1200                 goto failed_send;
1201
1202         hton24(req->qtcb->bottom.support.d_id, d_id);
1203         req->handler = zfcp_fsf_send_els_handler;
1204         req->data = els;
1205
1206         zfcp_dbf_san_els_request(req);
1207
1208         ret = zfcp_fsf_req_send(req);
1209         if (ret)
1210                 goto failed_send;
1211
1212         goto out;
1213
1214 failed_send:
1215         zfcp_fsf_req_free(req);
1216 out:
1217         spin_unlock_bh(&qdio->req_q_lock);
1218         return ret;
1219 }
1220
1221 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1222 {
1223         struct qdio_buffer_element *sbale;
1224         struct zfcp_fsf_req *req;
1225         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1226         int retval = -EIO;
1227
1228         spin_lock_bh(&qdio->req_q_lock);
1229         if (zfcp_fsf_req_sbal_get(qdio))
1230                 goto out;
1231
1232         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1233                                   qdio->adapter->pool.erp_req);
1234
1235         if (IS_ERR(req)) {
1236                 retval = PTR_ERR(req);
1237                 goto out;
1238         }
1239
1240         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1241         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1242         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1243         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1244
1245         req->qtcb->bottom.config.feature_selection =
1246                         FSF_FEATURE_CFDC |
1247                         FSF_FEATURE_LUN_SHARING |
1248                         FSF_FEATURE_NOTIFICATION_LOST |
1249                         FSF_FEATURE_UPDATE_ALERT;
1250         req->erp_action = erp_action;
1251         req->handler = zfcp_fsf_exchange_config_data_handler;
1252         erp_action->fsf_req_id = req->req_id;
1253
1254         zfcp_fsf_start_erp_timer(req);
1255         retval = zfcp_fsf_req_send(req);
1256         if (retval) {
1257                 zfcp_fsf_req_free(req);
1258                 erp_action->fsf_req_id = 0;
1259         }
1260 out:
1261         spin_unlock_bh(&qdio->req_q_lock);
1262         return retval;
1263 }
1264
1265 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1266                                        struct fsf_qtcb_bottom_config *data)
1267 {
1268         struct qdio_buffer_element *sbale;
1269         struct zfcp_fsf_req *req = NULL;
1270         int retval = -EIO;
1271
1272         spin_lock_bh(&qdio->req_q_lock);
1273         if (zfcp_fsf_req_sbal_get(qdio))
1274                 goto out_unlock;
1275
1276         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1277
1278         if (IS_ERR(req)) {
1279                 retval = PTR_ERR(req);
1280                 goto out_unlock;
1281         }
1282
1283         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1284         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1285         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1286         req->handler = zfcp_fsf_exchange_config_data_handler;
1287
1288         req->qtcb->bottom.config.feature_selection =
1289                         FSF_FEATURE_CFDC |
1290                         FSF_FEATURE_LUN_SHARING |
1291                         FSF_FEATURE_NOTIFICATION_LOST |
1292                         FSF_FEATURE_UPDATE_ALERT;
1293
1294         if (data)
1295                 req->data = data;
1296
1297         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1298         retval = zfcp_fsf_req_send(req);
1299         spin_unlock_bh(&qdio->req_q_lock);
1300         if (!retval)
1301                 wait_for_completion(&req->completion);
1302
1303         zfcp_fsf_req_free(req);
1304         return retval;
1305
1306 out_unlock:
1307         spin_unlock_bh(&qdio->req_q_lock);
1308         return retval;
1309 }
1310
1311 /**
1312  * zfcp_fsf_exchange_port_data - request information about local port
1313  * @erp_action: ERP action for the adapter for which port data is requested
1314  * Returns: 0 on success, error otherwise
1315  */
1316 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1317 {
1318         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1319         struct qdio_buffer_element *sbale;
1320         struct zfcp_fsf_req *req;
1321         int retval = -EIO;
1322
1323         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1324                 return -EOPNOTSUPP;
1325
1326         spin_lock_bh(&qdio->req_q_lock);
1327         if (zfcp_fsf_req_sbal_get(qdio))
1328                 goto out;
1329
1330         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1331                                   qdio->adapter->pool.erp_req);
1332
1333         if (IS_ERR(req)) {
1334                 retval = PTR_ERR(req);
1335                 goto out;
1336         }
1337
1338         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1339         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1340         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1341         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1342
1343         req->handler = zfcp_fsf_exchange_port_data_handler;
1344         req->erp_action = erp_action;
1345         erp_action->fsf_req_id = req->req_id;
1346
1347         zfcp_fsf_start_erp_timer(req);
1348         retval = zfcp_fsf_req_send(req);
1349         if (retval) {
1350                 zfcp_fsf_req_free(req);
1351                 erp_action->fsf_req_id = 0;
1352         }
1353 out:
1354         spin_unlock_bh(&qdio->req_q_lock);
1355         return retval;
1356 }
1357
1358 /**
1359  * zfcp_fsf_exchange_port_data_sync - request information about local port
1360  * @qdio: pointer to struct zfcp_qdio
1361  * @data: pointer to struct fsf_qtcb_bottom_port
1362  * Returns: 0 on success, error otherwise
1363  */
1364 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1365                                      struct fsf_qtcb_bottom_port *data)
1366 {
1367         struct qdio_buffer_element *sbale;
1368         struct zfcp_fsf_req *req = NULL;
1369         int retval = -EIO;
1370
1371         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1372                 return -EOPNOTSUPP;
1373
1374         spin_lock_bh(&qdio->req_q_lock);
1375         if (zfcp_fsf_req_sbal_get(qdio))
1376                 goto out_unlock;
1377
1378         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1379
1380         if (IS_ERR(req)) {
1381                 retval = PTR_ERR(req);
1382                 goto out_unlock;
1383         }
1384
1385         if (data)
1386                 req->data = data;
1387
1388         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1389         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1390         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1391
1392         req->handler = zfcp_fsf_exchange_port_data_handler;
1393         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1394         retval = zfcp_fsf_req_send(req);
1395         spin_unlock_bh(&qdio->req_q_lock);
1396
1397         if (!retval)
1398                 wait_for_completion(&req->completion);
1399
1400         zfcp_fsf_req_free(req);
1401
1402         return retval;
1403
1404 out_unlock:
1405         spin_unlock_bh(&qdio->req_q_lock);
1406         return retval;
1407 }
1408
1409 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1410 {
1411         struct zfcp_port *port = req->data;
1412         struct fsf_qtcb_header *header = &req->qtcb->header;
1413         struct fc_els_flogi *plogi;
1414
1415         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1416                 goto out;
1417
1418         switch (header->fsf_status) {
1419         case FSF_PORT_ALREADY_OPEN:
1420                 break;
1421         case FSF_ACCESS_DENIED:
1422                 zfcp_fsf_access_denied_port(req, port);
1423                 break;
1424         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1425                 dev_warn(&req->adapter->ccw_device->dev,
1426                          "Not enough FCP adapter resources to open "
1427                          "remote port 0x%016Lx\n",
1428                          (unsigned long long)port->wwpn);
1429                 zfcp_erp_port_failed(port, "fsoph_1", req);
1430                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1431                 break;
1432         case FSF_ADAPTER_STATUS_AVAILABLE:
1433                 switch (header->fsf_status_qual.word[0]) {
1434                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1435                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1436                 case FSF_SQ_NO_RETRY_POSSIBLE:
1437                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1438                         break;
1439                 }
1440                 break;
1441         case FSF_GOOD:
1442                 port->handle = header->port_handle;
1443                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1444                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1445                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1446                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1447                                   &port->status);
1448                 /* check whether D_ID has changed during open */
1449                 /*
1450                  * FIXME: This check is not airtight, as the FCP channel does
1451                  * not monitor closures of target port connections caused on
1452                  * the remote side. Thus, they might miss out on invalidating
1453                  * locally cached WWPNs (and other N_Port parameters) of gone
1454                  * target ports. So, our heroic attempt to make things safe
1455                  * could be undermined by 'open port' response data tagged with
1456                  * obsolete WWPNs. Another reason to monitor potential
1457                  * connection closures ourself at least (by interpreting
1458                  * incoming ELS' and unsolicited status). It just crosses my
1459                  * mind that one should be able to cross-check by means of
1460                  * another GID_PN straight after a port has been opened.
1461                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1462                  */
1463                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1464                 if (req->qtcb->bottom.support.els1_length >=
1465                     FSF_PLOGI_MIN_LEN)
1466                                 zfcp_fc_plogi_evaluate(port, plogi);
1467                 break;
1468         case FSF_UNKNOWN_OP_SUBTYPE:
1469                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1470                 break;
1471         }
1472
1473 out:
1474         put_device(&port->dev);
1475 }
1476
1477 /**
1478  * zfcp_fsf_open_port - create and send open port request
1479  * @erp_action: pointer to struct zfcp_erp_action
1480  * Returns: 0 on success, error otherwise
1481  */
1482 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1483 {
1484         struct qdio_buffer_element *sbale;
1485         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1486         struct zfcp_port *port = erp_action->port;
1487         struct zfcp_fsf_req *req;
1488         int retval = -EIO;
1489
1490         spin_lock_bh(&qdio->req_q_lock);
1491         if (zfcp_fsf_req_sbal_get(qdio))
1492                 goto out;
1493
1494         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1495                                   qdio->adapter->pool.erp_req);
1496
1497         if (IS_ERR(req)) {
1498                 retval = PTR_ERR(req);
1499                 goto out;
1500         }
1501
1502         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1503         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1504         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1505         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1506
1507         req->handler = zfcp_fsf_open_port_handler;
1508         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1509         req->data = port;
1510         req->erp_action = erp_action;
1511         erp_action->fsf_req_id = req->req_id;
1512         get_device(&port->dev);
1513
1514         zfcp_fsf_start_erp_timer(req);
1515         retval = zfcp_fsf_req_send(req);
1516         if (retval) {
1517                 zfcp_fsf_req_free(req);
1518                 erp_action->fsf_req_id = 0;
1519                 put_device(&port->dev);
1520         }
1521 out:
1522         spin_unlock_bh(&qdio->req_q_lock);
1523         return retval;
1524 }
1525
1526 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1527 {
1528         struct zfcp_port *port = req->data;
1529
1530         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1531                 return;
1532
1533         switch (req->qtcb->header.fsf_status) {
1534         case FSF_PORT_HANDLE_NOT_VALID:
1535                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1536                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1537                 break;
1538         case FSF_ADAPTER_STATUS_AVAILABLE:
1539                 break;
1540         case FSF_GOOD:
1541                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1542                                             ZFCP_STATUS_COMMON_OPEN,
1543                                             ZFCP_CLEAR);
1544                 break;
1545         }
1546 }
1547
1548 /**
1549  * zfcp_fsf_close_port - create and send close port request
1550  * @erp_action: pointer to struct zfcp_erp_action
1551  * Returns: 0 on success, error otherwise
1552  */
1553 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1554 {
1555         struct qdio_buffer_element *sbale;
1556         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1557         struct zfcp_fsf_req *req;
1558         int retval = -EIO;
1559
1560         spin_lock_bh(&qdio->req_q_lock);
1561         if (zfcp_fsf_req_sbal_get(qdio))
1562                 goto out;
1563
1564         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1565                                   qdio->adapter->pool.erp_req);
1566
1567         if (IS_ERR(req)) {
1568                 retval = PTR_ERR(req);
1569                 goto out;
1570         }
1571
1572         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1573         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1574         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1575         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1576
1577         req->handler = zfcp_fsf_close_port_handler;
1578         req->data = erp_action->port;
1579         req->erp_action = erp_action;
1580         req->qtcb->header.port_handle = erp_action->port->handle;
1581         erp_action->fsf_req_id = req->req_id;
1582
1583         zfcp_fsf_start_erp_timer(req);
1584         retval = zfcp_fsf_req_send(req);
1585         if (retval) {
1586                 zfcp_fsf_req_free(req);
1587                 erp_action->fsf_req_id = 0;
1588         }
1589 out:
1590         spin_unlock_bh(&qdio->req_q_lock);
1591         return retval;
1592 }
1593
1594 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1595 {
1596         struct zfcp_fc_wka_port *wka_port = req->data;
1597         struct fsf_qtcb_header *header = &req->qtcb->header;
1598
1599         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1600                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1601                 goto out;
1602         }
1603
1604         switch (header->fsf_status) {
1605         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1606                 dev_warn(&req->adapter->ccw_device->dev,
1607                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1608                 /* fall through */
1609         case FSF_ADAPTER_STATUS_AVAILABLE:
1610                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1611                 /* fall through */
1612         case FSF_ACCESS_DENIED:
1613                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1614                 break;
1615         case FSF_GOOD:
1616                 wka_port->handle = header->port_handle;
1617                 /* fall through */
1618         case FSF_PORT_ALREADY_OPEN:
1619                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1620         }
1621 out:
1622         wake_up(&wka_port->completion_wq);
1623 }
1624
1625 /**
1626  * zfcp_fsf_open_wka_port - create and send open wka-port request
1627  * @wka_port: pointer to struct zfcp_fc_wka_port
1628  * Returns: 0 on success, error otherwise
1629  */
1630 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1631 {
1632         struct qdio_buffer_element *sbale;
1633         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1634         struct zfcp_fsf_req *req;
1635         int retval = -EIO;
1636
1637         spin_lock_bh(&qdio->req_q_lock);
1638         if (zfcp_fsf_req_sbal_get(qdio))
1639                 goto out;
1640
1641         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1642                                   qdio->adapter->pool.erp_req);
1643
1644         if (unlikely(IS_ERR(req))) {
1645                 retval = PTR_ERR(req);
1646                 goto out;
1647         }
1648
1649         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1650         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1651         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1652         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1653
1654         req->handler = zfcp_fsf_open_wka_port_handler;
1655         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1656         req->data = wka_port;
1657
1658         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1659         retval = zfcp_fsf_req_send(req);
1660         if (retval)
1661                 zfcp_fsf_req_free(req);
1662 out:
1663         spin_unlock_bh(&qdio->req_q_lock);
1664         return retval;
1665 }
1666
1667 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1668 {
1669         struct zfcp_fc_wka_port *wka_port = req->data;
1670
1671         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1672                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1673                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1674         }
1675
1676         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1677         wake_up(&wka_port->completion_wq);
1678 }
1679
1680 /**
1681  * zfcp_fsf_close_wka_port - create and send close wka port request
1682  * @wka_port: WKA port to open
1683  * Returns: 0 on success, error otherwise
1684  */
1685 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1686 {
1687         struct qdio_buffer_element *sbale;
1688         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1689         struct zfcp_fsf_req *req;
1690         int retval = -EIO;
1691
1692         spin_lock_bh(&qdio->req_q_lock);
1693         if (zfcp_fsf_req_sbal_get(qdio))
1694                 goto out;
1695
1696         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1697                                   qdio->adapter->pool.erp_req);
1698
1699         if (unlikely(IS_ERR(req))) {
1700                 retval = PTR_ERR(req);
1701                 goto out;
1702         }
1703
1704         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1705         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1706         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1707         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1708
1709         req->handler = zfcp_fsf_close_wka_port_handler;
1710         req->data = wka_port;
1711         req->qtcb->header.port_handle = wka_port->handle;
1712
1713         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1714         retval = zfcp_fsf_req_send(req);
1715         if (retval)
1716                 zfcp_fsf_req_free(req);
1717 out:
1718         spin_unlock_bh(&qdio->req_q_lock);
1719         return retval;
1720 }
1721
1722 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1723 {
1724         struct zfcp_port *port = req->data;
1725         struct fsf_qtcb_header *header = &req->qtcb->header;
1726         struct zfcp_unit *unit;
1727
1728         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1729                 return;
1730
1731         switch (header->fsf_status) {
1732         case FSF_PORT_HANDLE_NOT_VALID:
1733                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1734                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1735                 break;
1736         case FSF_ACCESS_DENIED:
1737                 zfcp_fsf_access_denied_port(req, port);
1738                 break;
1739         case FSF_PORT_BOXED:
1740                 /* can't use generic zfcp_erp_modify_port_status because
1741                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1742                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1743                 read_lock(&port->unit_list_lock);
1744                 list_for_each_entry(unit, &port->unit_list, list)
1745                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1746                                           &unit->status);
1747                 read_unlock(&port->unit_list_lock);
1748                 zfcp_erp_port_boxed(port, "fscpph2", req);
1749                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1750                 break;
1751         case FSF_ADAPTER_STATUS_AVAILABLE:
1752                 switch (header->fsf_status_qual.word[0]) {
1753                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1754                         /* fall through */
1755                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1756                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1757                         break;
1758                 }
1759                 break;
1760         case FSF_GOOD:
1761                 /* can't use generic zfcp_erp_modify_port_status because
1762                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1763                  */
1764                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1765                 read_lock(&port->unit_list_lock);
1766                 list_for_each_entry(unit, &port->unit_list, list)
1767                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1768                                           &unit->status);
1769                 read_unlock(&port->unit_list_lock);
1770                 break;
1771         }
1772 }
1773
1774 /**
1775  * zfcp_fsf_close_physical_port - close physical port
1776  * @erp_action: pointer to struct zfcp_erp_action
1777  * Returns: 0 on success
1778  */
1779 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1780 {
1781         struct qdio_buffer_element *sbale;
1782         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1783         struct zfcp_fsf_req *req;
1784         int retval = -EIO;
1785
1786         spin_lock_bh(&qdio->req_q_lock);
1787         if (zfcp_fsf_req_sbal_get(qdio))
1788                 goto out;
1789
1790         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1791                                   qdio->adapter->pool.erp_req);
1792
1793         if (IS_ERR(req)) {
1794                 retval = PTR_ERR(req);
1795                 goto out;
1796         }
1797
1798         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1799         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1800         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1801         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1802
1803         req->data = erp_action->port;
1804         req->qtcb->header.port_handle = erp_action->port->handle;
1805         req->erp_action = erp_action;
1806         req->handler = zfcp_fsf_close_physical_port_handler;
1807         erp_action->fsf_req_id = req->req_id;
1808
1809         zfcp_fsf_start_erp_timer(req);
1810         retval = zfcp_fsf_req_send(req);
1811         if (retval) {
1812                 zfcp_fsf_req_free(req);
1813                 erp_action->fsf_req_id = 0;
1814         }
1815 out:
1816         spin_unlock_bh(&qdio->req_q_lock);
1817         return retval;
1818 }
1819
1820 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1821 {
1822         struct zfcp_adapter *adapter = req->adapter;
1823         struct zfcp_unit *unit = req->data;
1824         struct fsf_qtcb_header *header = &req->qtcb->header;
1825         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1826         struct fsf_queue_designator *queue_designator =
1827                                 &header->fsf_status_qual.fsf_queue_designator;
1828         int exclusive, readwrite;
1829
1830         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1831                 return;
1832
1833         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1834                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1835                           ZFCP_STATUS_UNIT_SHARED |
1836                           ZFCP_STATUS_UNIT_READONLY,
1837                           &unit->status);
1838
1839         switch (header->fsf_status) {
1840
1841         case FSF_PORT_HANDLE_NOT_VALID:
1842                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1843                 /* fall through */
1844         case FSF_LUN_ALREADY_OPEN:
1845                 break;
1846         case FSF_ACCESS_DENIED:
1847                 zfcp_fsf_access_denied_unit(req, unit);
1848                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1849                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1850                 break;
1851         case FSF_PORT_BOXED:
1852                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1853                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1854                 break;
1855         case FSF_LUN_SHARING_VIOLATION:
1856                 if (header->fsf_status_qual.word[0])
1857                         dev_warn(&adapter->ccw_device->dev,
1858                                  "LUN 0x%Lx on port 0x%Lx is already in "
1859                                  "use by CSS%d, MIF Image ID %x\n",
1860                                  (unsigned long long)unit->fcp_lun,
1861                                  (unsigned long long)unit->port->wwpn,
1862                                  queue_designator->cssid,
1863                                  queue_designator->hla);
1864                 else
1865                         zfcp_act_eval_err(adapter,
1866                                           header->fsf_status_qual.word[2]);
1867                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1868                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1869                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1870                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1871                 break;
1872         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1873                 dev_warn(&adapter->ccw_device->dev,
1874                          "No handle is available for LUN "
1875                          "0x%016Lx on port 0x%016Lx\n",
1876                          (unsigned long long)unit->fcp_lun,
1877                          (unsigned long long)unit->port->wwpn);
1878                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1879                 /* fall through */
1880         case FSF_INVALID_COMMAND_OPTION:
1881                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1882                 break;
1883         case FSF_ADAPTER_STATUS_AVAILABLE:
1884                 switch (header->fsf_status_qual.word[0]) {
1885                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1886                         zfcp_fc_test_link(unit->port);
1887                         /* fall through */
1888                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1889                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1890                         break;
1891                 }
1892                 break;
1893
1894         case FSF_GOOD:
1895                 unit->handle = header->lun_handle;
1896                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1897
1898                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1899                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1900                     !zfcp_ccw_priv_sch(adapter)) {
1901                         exclusive = (bottom->lun_access_info &
1902                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1903                         readwrite = (bottom->lun_access_info &
1904                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1905
1906                         if (!exclusive)
1907                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1908                                                 &unit->status);
1909
1910                         if (!readwrite) {
1911                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1912                                                 &unit->status);
1913                                 dev_info(&adapter->ccw_device->dev,
1914                                          "SCSI device at LUN 0x%016Lx on port "
1915                                          "0x%016Lx opened read-only\n",
1916                                          (unsigned long long)unit->fcp_lun,
1917                                          (unsigned long long)unit->port->wwpn);
1918                         }
1919
1920                         if (exclusive && !readwrite) {
1921                                 dev_err(&adapter->ccw_device->dev,
1922                                         "Exclusive read-only access not "
1923                                         "supported (unit 0x%016Lx, "
1924                                         "port 0x%016Lx)\n",
1925                                         (unsigned long long)unit->fcp_lun,
1926                                         (unsigned long long)unit->port->wwpn);
1927                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1928                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1929                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1930                         } else if (!exclusive && readwrite) {
1931                                 dev_err(&adapter->ccw_device->dev,
1932                                         "Shared read-write access not "
1933                                         "supported (unit 0x%016Lx, port "
1934                                         "0x%016Lx)\n",
1935                                         (unsigned long long)unit->fcp_lun,
1936                                         (unsigned long long)unit->port->wwpn);
1937                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1938                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1939                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1940                         }
1941                 }
1942                 break;
1943         }
1944 }
1945
1946 /**
1947  * zfcp_fsf_open_unit - open unit
1948  * @erp_action: pointer to struct zfcp_erp_action
1949  * Returns: 0 on success, error otherwise
1950  */
1951 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1952 {
1953         struct qdio_buffer_element *sbale;
1954         struct zfcp_adapter *adapter = erp_action->adapter;
1955         struct zfcp_qdio *qdio = adapter->qdio;
1956         struct zfcp_fsf_req *req;
1957         int retval = -EIO;
1958
1959         spin_lock_bh(&qdio->req_q_lock);
1960         if (zfcp_fsf_req_sbal_get(qdio))
1961                 goto out;
1962
1963         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1964                                   adapter->pool.erp_req);
1965
1966         if (IS_ERR(req)) {
1967                 retval = PTR_ERR(req);
1968                 goto out;
1969         }
1970
1971         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1972         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1973         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1974         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1975
1976         req->qtcb->header.port_handle = erp_action->port->handle;
1977         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1978         req->handler = zfcp_fsf_open_unit_handler;
1979         req->data = erp_action->unit;
1980         req->erp_action = erp_action;
1981         erp_action->fsf_req_id = req->req_id;
1982
1983         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1984                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1985
1986         zfcp_fsf_start_erp_timer(req);
1987         retval = zfcp_fsf_req_send(req);
1988         if (retval) {
1989                 zfcp_fsf_req_free(req);
1990                 erp_action->fsf_req_id = 0;
1991         }
1992 out:
1993         spin_unlock_bh(&qdio->req_q_lock);
1994         return retval;
1995 }
1996
1997 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1998 {
1999         struct zfcp_unit *unit = req->data;
2000
2001         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2002                 return;
2003
2004         switch (req->qtcb->header.fsf_status) {
2005         case FSF_PORT_HANDLE_NOT_VALID:
2006                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2007                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2008                 break;
2009         case FSF_LUN_HANDLE_NOT_VALID:
2010                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2011                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2012                 break;
2013         case FSF_PORT_BOXED:
2014                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2015                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2016                 break;
2017         case FSF_ADAPTER_STATUS_AVAILABLE:
2018                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2019                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2020                         zfcp_fc_test_link(unit->port);
2021                         /* fall through */
2022                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2023                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2024                         break;
2025                 }
2026                 break;
2027         case FSF_GOOD:
2028                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2029                 break;
2030         }
2031 }
2032
2033 /**
2034  * zfcp_fsf_close_unit - close zfcp unit
2035  * @erp_action: pointer to struct zfcp_unit
2036  * Returns: 0 on success, error otherwise
2037  */
2038 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2039 {
2040         struct qdio_buffer_element *sbale;
2041         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2042         struct zfcp_fsf_req *req;
2043         int retval = -EIO;
2044
2045         spin_lock_bh(&qdio->req_q_lock);
2046         if (zfcp_fsf_req_sbal_get(qdio))
2047                 goto out;
2048
2049         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2050                                   qdio->adapter->pool.erp_req);
2051
2052         if (IS_ERR(req)) {
2053                 retval = PTR_ERR(req);
2054                 goto out;
2055         }
2056
2057         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2058         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2059         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2060         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2061
2062         req->qtcb->header.port_handle = erp_action->port->handle;
2063         req->qtcb->header.lun_handle = erp_action->unit->handle;
2064         req->handler = zfcp_fsf_close_unit_handler;
2065         req->data = erp_action->unit;
2066         req->erp_action = erp_action;
2067         erp_action->fsf_req_id = req->req_id;
2068
2069         zfcp_fsf_start_erp_timer(req);
2070         retval = zfcp_fsf_req_send(req);
2071         if (retval) {
2072                 zfcp_fsf_req_free(req);
2073                 erp_action->fsf_req_id = 0;
2074         }
2075 out:
2076         spin_unlock_bh(&qdio->req_q_lock);
2077         return retval;
2078 }
2079
2080 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2081 {
2082         lat_rec->sum += lat;
2083         lat_rec->min = min(lat_rec->min, lat);
2084         lat_rec->max = max(lat_rec->max, lat);
2085 }
2086
2087 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2088 {
2089         struct fsf_qual_latency_info *lat_in;
2090         struct latency_cont *lat = NULL;
2091         struct zfcp_unit *unit = req->unit;
2092         struct zfcp_blk_drv_data blktrc;
2093         int ticks = req->adapter->timer_ticks;
2094
2095         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2096
2097         blktrc.flags = 0;
2098         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2099         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2100                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2101         blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2102         blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2103
2104         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2105                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2106                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2107                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2108
2109                 switch (req->qtcb->bottom.io.data_direction) {
2110                 case FSF_DATADIR_READ:
2111                         lat = &unit->latencies.read;
2112                         break;
2113                 case FSF_DATADIR_WRITE:
2114                         lat = &unit->latencies.write;
2115                         break;
2116                 case FSF_DATADIR_CMND:
2117                         lat = &unit->latencies.cmd;
2118                         break;
2119                 }
2120
2121                 if (lat) {
2122                         spin_lock(&unit->latencies.lock);
2123                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2124                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2125                         lat->counter++;
2126                         spin_unlock(&unit->latencies.lock);
2127                 }
2128         }
2129
2130         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2131                             sizeof(blktrc));
2132 }
2133
2134 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2135 {
2136         struct scsi_cmnd *scpnt;
2137         struct fcp_resp_with_ext *fcp_rsp;
2138         unsigned long flags;
2139
2140         read_lock_irqsave(&req->adapter->abort_lock, flags);
2141
2142         scpnt = req->data;
2143         if (unlikely(!scpnt)) {
2144                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2145                 return;
2146         }
2147
2148         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2149                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2150                 goto skip_fsfstatus;
2151         }
2152
2153         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2154         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2155
2156         zfcp_fsf_req_trace(req, scpnt);
2157
2158 skip_fsfstatus:
2159         if (scpnt->result != 0)
2160                 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2161         else if (scpnt->retries > 0)
2162                 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2163         else
2164                 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2165
2166         scpnt->host_scribble = NULL;
2167         (scpnt->scsi_done) (scpnt);
2168         /*
2169          * We must hold this lock until scsi_done has been called.
2170          * Otherwise we may call scsi_done after abort regarding this
2171          * command has completed.
2172          * Note: scsi_done must not block!
2173          */
2174         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2175 }
2176
2177 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2178 {
2179         struct fcp_resp_with_ext *fcp_rsp;
2180         struct fcp_resp_rsp_info *rsp_info;
2181
2182         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2183         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2184
2185         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2186              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2187                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2188 }
2189
2190
2191 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2192 {
2193         struct zfcp_unit *unit;
2194         struct fsf_qtcb_header *header = &req->qtcb->header;
2195
2196         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2197                 unit = req->data;
2198         else
2199                 unit = req->unit;
2200
2201         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2202                 goto skip_fsfstatus;
2203
2204         switch (header->fsf_status) {
2205         case FSF_HANDLE_MISMATCH:
2206         case FSF_PORT_HANDLE_NOT_VALID:
2207                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2208                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2209                 break;
2210         case FSF_FCPLUN_NOT_VALID:
2211         case FSF_LUN_HANDLE_NOT_VALID:
2212                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2213                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2214                 break;
2215         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2216                 zfcp_fsf_class_not_supp(req);
2217                 break;
2218         case FSF_ACCESS_DENIED:
2219                 zfcp_fsf_access_denied_unit(req, unit);
2220                 break;
2221         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2222                 dev_err(&req->adapter->ccw_device->dev,
2223                         "Incorrect direction %d, unit 0x%016Lx on port "
2224                         "0x%016Lx closed\n",
2225                         req->qtcb->bottom.io.data_direction,
2226                         (unsigned long long)unit->fcp_lun,
2227                         (unsigned long long)unit->port->wwpn);
2228                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2229                                           req);
2230                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2231                 break;
2232         case FSF_CMND_LENGTH_NOT_VALID:
2233                 dev_err(&req->adapter->ccw_device->dev,
2234                         "Incorrect CDB length %d, unit 0x%016Lx on "
2235                         "port 0x%016Lx closed\n",
2236                         req->qtcb->bottom.io.fcp_cmnd_length,
2237                         (unsigned long long)unit->fcp_lun,
2238                         (unsigned long long)unit->port->wwpn);
2239                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2240                                           req);
2241                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2242                 break;
2243         case FSF_PORT_BOXED:
2244                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2245                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2246                 break;
2247         case FSF_LUN_BOXED:
2248                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2249                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2250                 break;
2251         case FSF_ADAPTER_STATUS_AVAILABLE:
2252                 if (header->fsf_status_qual.word[0] ==
2253                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2254                         zfcp_fc_test_link(unit->port);
2255                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2256                 break;
2257         }
2258 skip_fsfstatus:
2259         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2260                 zfcp_fsf_send_fcp_ctm_handler(req);
2261         else {
2262                 zfcp_fsf_send_fcp_command_task_handler(req);
2263                 req->unit = NULL;
2264                 put_device(&unit->dev);
2265         }
2266 }
2267
2268 /**
2269  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2270  * @unit: unit where command is sent to
2271  * @scsi_cmnd: scsi command to be sent
2272  */
2273 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2274                                    struct scsi_cmnd *scsi_cmnd)
2275 {
2276         struct zfcp_fsf_req *req;
2277         struct fcp_cmnd *fcp_cmnd;
2278         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2279         int real_bytes, retval = -EIO;
2280         struct zfcp_adapter *adapter = unit->port->adapter;
2281         struct zfcp_qdio *qdio = adapter->qdio;
2282
2283         if (unlikely(!(atomic_read(&unit->status) &
2284                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2285                 return -EBUSY;
2286
2287         spin_lock(&qdio->req_q_lock);
2288         if (atomic_read(&qdio->req_q.count) <= 0) {
2289                 atomic_inc(&qdio->req_q_full);
2290                 goto out;
2291         }
2292
2293         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2294                                   adapter->pool.scsi_req);
2295
2296         if (IS_ERR(req)) {
2297                 retval = PTR_ERR(req);
2298                 goto out;
2299         }
2300
2301         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2302         get_device(&unit->dev);
2303         req->unit = unit;
2304         req->data = scsi_cmnd;
2305         req->handler = zfcp_fsf_send_fcp_command_handler;
2306         req->qtcb->header.lun_handle = unit->handle;
2307         req->qtcb->header.port_handle = unit->port->handle;
2308         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2309         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2310
2311         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2312
2313         /*
2314          * set depending on data direction:
2315          *      data direction bits in SBALE (SB Type)
2316          *      data direction bits in QTCB
2317          */
2318         switch (scsi_cmnd->sc_data_direction) {
2319         case DMA_NONE:
2320                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2321                 break;
2322         case DMA_FROM_DEVICE:
2323                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2324                 break;
2325         case DMA_TO_DEVICE:
2326                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2327                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2328                 break;
2329         case DMA_BIDIRECTIONAL:
2330                 goto failed_scsi_cmnd;
2331         }
2332
2333         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2334         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2335
2336         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2337                                              scsi_sglist(scsi_cmnd),
2338                                              FSF_MAX_SBALS_PER_REQ);
2339         if (unlikely(real_bytes < 0)) {
2340                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2341                         dev_err(&adapter->ccw_device->dev,
2342                                 "Oversize data package, unit 0x%016Lx "
2343                                 "on port 0x%016Lx closed\n",
2344                                 (unsigned long long)unit->fcp_lun,
2345                                 (unsigned long long)unit->port->wwpn);
2346                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2347                         retval = -EINVAL;
2348                 }
2349                 goto failed_scsi_cmnd;
2350         }
2351
2352         retval = zfcp_fsf_req_send(req);
2353         if (unlikely(retval))
2354                 goto failed_scsi_cmnd;
2355
2356         goto out;
2357
2358 failed_scsi_cmnd:
2359         put_device(&unit->dev);
2360         zfcp_fsf_req_free(req);
2361         scsi_cmnd->host_scribble = NULL;
2362 out:
2363         spin_unlock(&qdio->req_q_lock);
2364         return retval;
2365 }
2366
2367 /**
2368  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2369  * @unit: pointer to struct zfcp_unit
2370  * @tm_flags: unsigned byte for task management flags
2371  * Returns: on success pointer to struct fsf_req, NULL otherwise
2372  */
2373 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2374 {
2375         struct qdio_buffer_element *sbale;
2376         struct zfcp_fsf_req *req = NULL;
2377         struct fcp_cmnd *fcp_cmnd;
2378         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2379
2380         if (unlikely(!(atomic_read(&unit->status) &
2381                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2382                 return NULL;
2383
2384         spin_lock_bh(&qdio->req_q_lock);
2385         if (zfcp_fsf_req_sbal_get(qdio))
2386                 goto out;
2387
2388         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2389                                   qdio->adapter->pool.scsi_req);
2390
2391         if (IS_ERR(req)) {
2392                 req = NULL;
2393                 goto out;
2394         }
2395
2396         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2397         req->data = unit;
2398         req->handler = zfcp_fsf_send_fcp_command_handler;
2399         req->qtcb->header.lun_handle = unit->handle;
2400         req->qtcb->header.port_handle = unit->port->handle;
2401         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2402         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2403         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2404
2405         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2406         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2407         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2408
2409         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2410         zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2411
2412         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2413         if (!zfcp_fsf_req_send(req))
2414                 goto out;
2415
2416         zfcp_fsf_req_free(req);
2417         req = NULL;
2418 out:
2419         spin_unlock_bh(&qdio->req_q_lock);
2420         return req;
2421 }
2422
2423 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2424 {
2425 }
2426
2427 /**
2428  * zfcp_fsf_control_file - control file upload/download
2429  * @adapter: pointer to struct zfcp_adapter
2430  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2431  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2432  */
2433 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2434                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2435 {
2436         struct qdio_buffer_element *sbale;
2437         struct zfcp_qdio *qdio = adapter->qdio;
2438         struct zfcp_fsf_req *req = NULL;
2439         struct fsf_qtcb_bottom_support *bottom;
2440         int direction, retval = -EIO, bytes;
2441
2442         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2443                 return ERR_PTR(-EOPNOTSUPP);
2444
2445         switch (fsf_cfdc->command) {
2446         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2447                 direction = SBAL_FLAGS0_TYPE_WRITE;
2448                 break;
2449         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2450                 direction = SBAL_FLAGS0_TYPE_READ;
2451                 break;
2452         default:
2453                 return ERR_PTR(-EINVAL);
2454         }
2455
2456         spin_lock_bh(&qdio->req_q_lock);
2457         if (zfcp_fsf_req_sbal_get(qdio))
2458                 goto out;
2459
2460         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2461         if (IS_ERR(req)) {
2462                 retval = -EPERM;
2463                 goto out;
2464         }
2465
2466         req->handler = zfcp_fsf_control_file_handler;
2467
2468         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2469         sbale[0].flags |= direction;
2470
2471         bottom = &req->qtcb->bottom.support;
2472         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2473         bottom->option = fsf_cfdc->option;
2474
2475         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2476                                         direction, fsf_cfdc->sg,
2477                                         FSF_MAX_SBALS_PER_REQ);
2478         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2479                 zfcp_fsf_req_free(req);
2480                 goto out;
2481         }
2482
2483         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2484         retval = zfcp_fsf_req_send(req);
2485 out:
2486         spin_unlock_bh(&qdio->req_q_lock);
2487
2488         if (!retval) {
2489                 wait_for_completion(&req->completion);
2490                 return req;
2491         }
2492         return ERR_PTR(retval);
2493 }
2494
2495 /**
2496  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2497  * @adapter: pointer to struct zfcp_adapter
2498  * @sbal_idx: response queue index of SBAL to be processed
2499  */
2500 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2501 {
2502         struct zfcp_adapter *adapter = qdio->adapter;
2503         struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2504         struct qdio_buffer_element *sbale;
2505         struct zfcp_fsf_req *fsf_req;
2506         unsigned long req_id;
2507         int idx;
2508
2509         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2510
2511                 sbale = &sbal->element[idx];
2512                 req_id = (unsigned long) sbale->addr;
2513                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2514
2515                 if (!fsf_req)
2516                         /*
2517                          * Unknown request means that we have potentially memory
2518                          * corruption and must stop the machine immediately.
2519                          */
2520                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2521                               req_id, dev_name(&adapter->ccw_device->dev));
2522
2523                 fsf_req->queue_req.sbal_response = sbal_idx;
2524                 fsf_req->queue_req.qdio_inb_usage =
2525                         atomic_read(&qdio->resp_q.count);
2526                 zfcp_fsf_req_complete(fsf_req);
2527
2528                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2529                         break;
2530         }
2531 }