zfcp: status read buffers on first adapter open with link down
[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 Corp. 2002, 2013
7  */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <linux/slab.h>
14 #include <scsi/fc/fc_els.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17 #include "zfcp_dbf.h"
18 #include "zfcp_qdio.h"
19 #include "zfcp_reqlist.h"
20
21 struct kmem_cache *zfcp_fsf_qtcb_cache;
22
23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
24 {
25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
26         zfcp_qdio_siosl(adapter);
27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
28                                 "fsrth_1");
29 }
30
31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
32                                  unsigned long timeout)
33 {
34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
36         fsf_req->timer.expires = jiffies + timeout;
37         add_timer(&fsf_req->timer);
38 }
39
40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
41 {
42         BUG_ON(!fsf_req->erp_action);
43         fsf_req->timer.function = zfcp_erp_timeout_handler;
44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
45         fsf_req->timer.expires = jiffies + 30 * HZ;
46         add_timer(&fsf_req->timer);
47 }
48
49 /* association between FSF command and FSF QTCB type */
50 static u32 fsf_qtcb_type[] = {
51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
64 };
65
66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
67 {
68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
69                 "operational because of an unsupported FC class\n");
70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
72 }
73
74 /**
75  * zfcp_fsf_req_free - free memory used by fsf request
76  * @fsf_req: pointer to struct zfcp_fsf_req
77  */
78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
79 {
80         if (likely(req->pool)) {
81                 if (likely(req->qtcb))
82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
83                 mempool_free(req, req->pool);
84                 return;
85         }
86
87         if (likely(req->qtcb))
88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
89         kfree(req);
90 }
91
92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
93 {
94         unsigned long flags;
95         struct fsf_status_read_buffer *sr_buf = req->data;
96         struct zfcp_adapter *adapter = req->adapter;
97         struct zfcp_port *port;
98         int d_id = ntoh24(sr_buf->d_id);
99
100         read_lock_irqsave(&adapter->port_list_lock, flags);
101         list_for_each_entry(port, &adapter->port_list, list)
102                 if (port->d_id == d_id) {
103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
104                         break;
105                 }
106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
107 }
108
109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
110                                          struct fsf_link_down_info *link_down)
111 {
112         struct zfcp_adapter *adapter = req->adapter;
113
114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
115                 return;
116
117         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
118
119         zfcp_scsi_schedule_rports_block(adapter);
120
121         if (!link_down)
122                 goto out;
123
124         switch (link_down->error_code) {
125         case FSF_PSQ_LINK_NO_LIGHT:
126                 dev_warn(&req->adapter->ccw_device->dev,
127                          "There is no light signal from the local "
128                          "fibre channel cable\n");
129                 break;
130         case FSF_PSQ_LINK_WRAP_PLUG:
131                 dev_warn(&req->adapter->ccw_device->dev,
132                          "There is a wrap plug instead of a fibre "
133                          "channel cable\n");
134                 break;
135         case FSF_PSQ_LINK_NO_FCP:
136                 dev_warn(&req->adapter->ccw_device->dev,
137                          "The adjacent fibre channel node does not "
138                          "support FCP\n");
139                 break;
140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
141                 dev_warn(&req->adapter->ccw_device->dev,
142                          "The FCP device is suspended because of a "
143                          "firmware update\n");
144                 break;
145         case FSF_PSQ_LINK_INVALID_WWPN:
146                 dev_warn(&req->adapter->ccw_device->dev,
147                          "The FCP device detected a WWPN that is "
148                          "duplicate or not valid\n");
149                 break;
150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
151                 dev_warn(&req->adapter->ccw_device->dev,
152                          "The fibre channel fabric does not support NPIV\n");
153                 break;
154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
155                 dev_warn(&req->adapter->ccw_device->dev,
156                          "The FCP adapter cannot support more NPIV ports\n");
157                 break;
158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
159                 dev_warn(&req->adapter->ccw_device->dev,
160                          "The adjacent switch cannot support "
161                          "more NPIV ports\n");
162                 break;
163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
164                 dev_warn(&req->adapter->ccw_device->dev,
165                          "The FCP adapter could not log in to the "
166                          "fibre channel fabric\n");
167                 break;
168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
169                 dev_warn(&req->adapter->ccw_device->dev,
170                          "The WWPN assignment file on the FCP adapter "
171                          "has been damaged\n");
172                 break;
173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
174                 dev_warn(&req->adapter->ccw_device->dev,
175                          "The mode table on the FCP adapter "
176                          "has been damaged\n");
177                 break;
178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
179                 dev_warn(&req->adapter->ccw_device->dev,
180                          "All NPIV ports on the FCP adapter have "
181                          "been assigned\n");
182                 break;
183         default:
184                 dev_warn(&req->adapter->ccw_device->dev,
185                          "The link between the FCP adapter and "
186                          "the FC fabric is down\n");
187         }
188 out:
189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
190 }
191
192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
193 {
194         struct fsf_status_read_buffer *sr_buf = req->data;
195         struct fsf_link_down_info *ldi =
196                 (struct fsf_link_down_info *) &sr_buf->payload;
197
198         switch (sr_buf->status_subtype) {
199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
200                 zfcp_fsf_link_down_info_eval(req, ldi);
201                 break;
202         case FSF_STATUS_READ_SUB_FDISC_FAILED:
203                 zfcp_fsf_link_down_info_eval(req, ldi);
204                 break;
205         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
206                 zfcp_fsf_link_down_info_eval(req, NULL);
207         };
208 }
209
210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
211 {
212         struct zfcp_adapter *adapter = req->adapter;
213         struct fsf_status_read_buffer *sr_buf = req->data;
214
215         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
216                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
217                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
218                 zfcp_fsf_req_free(req);
219                 return;
220         }
221
222         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
223
224         switch (sr_buf->status_type) {
225         case FSF_STATUS_READ_PORT_CLOSED:
226                 zfcp_fsf_status_read_port_closed(req);
227                 break;
228         case FSF_STATUS_READ_INCOMING_ELS:
229                 zfcp_fc_incoming_els(req);
230                 break;
231         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
232                 break;
233         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
234                 dev_warn(&adapter->ccw_device->dev,
235                          "The error threshold for checksum statistics "
236                          "has been exceeded\n");
237                 zfcp_dbf_hba_bit_err("fssrh_3", req);
238                 break;
239         case FSF_STATUS_READ_LINK_DOWN:
240                 zfcp_fsf_status_read_link_down(req);
241                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
242                 break;
243         case FSF_STATUS_READ_LINK_UP:
244                 dev_info(&adapter->ccw_device->dev,
245                          "The local link has been restored\n");
246                 /* All ports should be marked as ready to run again */
247                 zfcp_erp_set_adapter_status(adapter,
248                                             ZFCP_STATUS_COMMON_RUNNING);
249                 zfcp_erp_adapter_reopen(adapter,
250                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
251                                         ZFCP_STATUS_COMMON_ERP_FAILED,
252                                         "fssrh_2");
253                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
254
255                 break;
256         case FSF_STATUS_READ_NOTIFICATION_LOST:
257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
258                         zfcp_cfdc_adapter_access_changed(adapter);
259                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
260                         queue_work(adapter->work_queue, &adapter->scan_work);
261                 break;
262         case FSF_STATUS_READ_CFDC_UPDATED:
263                 zfcp_cfdc_adapter_access_changed(adapter);
264                 break;
265         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
266                 adapter->adapter_features = sr_buf->payload.word[0];
267                 break;
268         }
269
270         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
271         zfcp_fsf_req_free(req);
272
273         atomic_inc(&adapter->stat_miss);
274         queue_work(adapter->work_queue, &adapter->stat_work);
275 }
276
277 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
278 {
279         switch (req->qtcb->header.fsf_status_qual.word[0]) {
280         case FSF_SQ_FCP_RSP_AVAILABLE:
281         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
282         case FSF_SQ_NO_RETRY_POSSIBLE:
283         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
284                 return;
285         case FSF_SQ_COMMAND_ABORTED:
286                 break;
287         case FSF_SQ_NO_RECOM:
288                 dev_err(&req->adapter->ccw_device->dev,
289                         "The FCP adapter reported a problem "
290                         "that cannot be recovered\n");
291                 zfcp_qdio_siosl(req->adapter);
292                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
293                 break;
294         }
295         /* all non-return stats set FSFREQ_ERROR*/
296         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
297 }
298
299 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
300 {
301         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
302                 return;
303
304         switch (req->qtcb->header.fsf_status) {
305         case FSF_UNKNOWN_COMMAND:
306                 dev_err(&req->adapter->ccw_device->dev,
307                         "The FCP adapter does not recognize the command 0x%x\n",
308                         req->qtcb->header.fsf_command);
309                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
310                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
311                 break;
312         case FSF_ADAPTER_STATUS_AVAILABLE:
313                 zfcp_fsf_fsfstatus_qual_eval(req);
314                 break;
315         }
316 }
317
318 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
319 {
320         struct zfcp_adapter *adapter = req->adapter;
321         struct fsf_qtcb *qtcb = req->qtcb;
322         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
323
324         zfcp_dbf_hba_fsf_response(req);
325
326         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
327                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
328                 return;
329         }
330
331         switch (qtcb->prefix.prot_status) {
332         case FSF_PROT_GOOD:
333         case FSF_PROT_FSF_STATUS_PRESENTED:
334                 return;
335         case FSF_PROT_QTCB_VERSION_ERROR:
336                 dev_err(&adapter->ccw_device->dev,
337                         "QTCB version 0x%x not supported by FCP adapter "
338                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
339                         psq->word[0], psq->word[1]);
340                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
341                 break;
342         case FSF_PROT_ERROR_STATE:
343         case FSF_PROT_SEQ_NUMB_ERROR:
344                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
345                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
346                 break;
347         case FSF_PROT_UNSUPP_QTCB_TYPE:
348                 dev_err(&adapter->ccw_device->dev,
349                         "The QTCB type is not supported by the FCP adapter\n");
350                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
351                 break;
352         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
353                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
354                                 &adapter->status);
355                 break;
356         case FSF_PROT_DUPLICATE_REQUEST_ID:
357                 dev_err(&adapter->ccw_device->dev,
358                         "0x%Lx is an ambiguous request identifier\n",
359                         (unsigned long long)qtcb->bottom.support.req_handle);
360                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
361                 break;
362         case FSF_PROT_LINK_DOWN:
363                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
364                 /* go through reopen to flush pending requests */
365                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
366                 break;
367         case FSF_PROT_REEST_QUEUE:
368                 /* All ports should be marked as ready to run again */
369                 zfcp_erp_set_adapter_status(adapter,
370                                             ZFCP_STATUS_COMMON_RUNNING);
371                 zfcp_erp_adapter_reopen(adapter,
372                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
373                                         ZFCP_STATUS_COMMON_ERP_FAILED,
374                                         "fspse_8");
375                 break;
376         default:
377                 dev_err(&adapter->ccw_device->dev,
378                         "0x%x is not a valid transfer protocol status\n",
379                         qtcb->prefix.prot_status);
380                 zfcp_qdio_siosl(adapter);
381                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
382         }
383         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
384 }
385
386 /**
387  * zfcp_fsf_req_complete - process completion of a FSF request
388  * @fsf_req: The FSF request that has been completed.
389  *
390  * When a request has been completed either from the FCP adapter,
391  * or it has been dismissed due to a queue shutdown, this function
392  * is called to process the completion status and trigger further
393  * events related to the FSF request.
394  */
395 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
396 {
397         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
398                 zfcp_fsf_status_read_handler(req);
399                 return;
400         }
401
402         del_timer(&req->timer);
403         zfcp_fsf_protstatus_eval(req);
404         zfcp_fsf_fsfstatus_eval(req);
405         req->handler(req);
406
407         if (req->erp_action)
408                 zfcp_erp_notify(req->erp_action, 0);
409
410         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
411                 zfcp_fsf_req_free(req);
412         else
413                 complete(&req->completion);
414 }
415
416 /**
417  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
418  * @adapter: pointer to struct zfcp_adapter
419  *
420  * Never ever call this without shutting down the adapter first.
421  * Otherwise the adapter would continue using and corrupting s390 storage.
422  * Included BUG_ON() call to ensure this is done.
423  * ERP is supposed to be the only user of this function.
424  */
425 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
426 {
427         struct zfcp_fsf_req *req, *tmp;
428         LIST_HEAD(remove_queue);
429
430         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
431         zfcp_reqlist_move(adapter->req_list, &remove_queue);
432
433         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
434                 list_del(&req->list);
435                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
436                 zfcp_fsf_req_complete(req);
437         }
438 }
439
440 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
441 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
442 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
443 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
444 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
445 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
446 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
447
448 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
449 {
450         u32 fdmi_speed = 0;
451         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
452                 fdmi_speed |= FC_PORTSPEED_1GBIT;
453         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
454                 fdmi_speed |= FC_PORTSPEED_2GBIT;
455         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
456                 fdmi_speed |= FC_PORTSPEED_4GBIT;
457         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
458                 fdmi_speed |= FC_PORTSPEED_10GBIT;
459         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
460                 fdmi_speed |= FC_PORTSPEED_8GBIT;
461         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
462                 fdmi_speed |= FC_PORTSPEED_16GBIT;
463         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
464                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
465         return fdmi_speed;
466 }
467
468 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
469 {
470         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
471         struct zfcp_adapter *adapter = req->adapter;
472         struct Scsi_Host *shost = adapter->scsi_host;
473         struct fc_els_flogi *nsp, *plogi;
474
475         /* adjust pointers for missing command code */
476         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
477                                         - sizeof(u32));
478         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
479                                         - sizeof(u32));
480
481         if (req->data)
482                 memcpy(req->data, bottom, sizeof(*bottom));
483
484         fc_host_port_name(shost) = nsp->fl_wwpn;
485         fc_host_node_name(shost) = nsp->fl_wwnn;
486         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
487
488         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
489         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
490                                          (u16)FSF_STATUS_READS_RECOM);
491
492         if (fc_host_permanent_port_name(shost) == -1)
493                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
494
495         zfcp_scsi_set_prot(adapter);
496
497         /* no error return above here, otherwise must fix call chains */
498         /* do not evaluate invalid fields */
499         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
500                 return 0;
501
502         fc_host_port_id(shost) = ntoh24(bottom->s_id);
503         fc_host_speed(shost) =
504                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
505
506         adapter->hydra_version = bottom->adapter_type;
507
508         switch (bottom->fc_topology) {
509         case FSF_TOPO_P2P:
510                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
511                 adapter->peer_wwpn = plogi->fl_wwpn;
512                 adapter->peer_wwnn = plogi->fl_wwnn;
513                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
514                 break;
515         case FSF_TOPO_FABRIC:
516                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
517                 break;
518         case FSF_TOPO_AL:
519                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
520                 /* fall through */
521         default:
522                 dev_err(&adapter->ccw_device->dev,
523                         "Unknown or unsupported arbitrated loop "
524                         "fibre channel topology detected\n");
525                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
526                 return -EIO;
527         }
528
529         return 0;
530 }
531
532 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
533 {
534         struct zfcp_adapter *adapter = req->adapter;
535         struct fsf_qtcb *qtcb = req->qtcb;
536         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
537         struct Scsi_Host *shost = adapter->scsi_host;
538
539         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
540                 return;
541
542         adapter->fsf_lic_version = bottom->lic_version;
543         adapter->adapter_features = bottom->adapter_features;
544         adapter->connection_features = bottom->connection_features;
545         adapter->peer_wwpn = 0;
546         adapter->peer_wwnn = 0;
547         adapter->peer_d_id = 0;
548
549         switch (qtcb->header.fsf_status) {
550         case FSF_GOOD:
551                 if (zfcp_fsf_exchange_config_evaluate(req))
552                         return;
553
554                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
555                         dev_err(&adapter->ccw_device->dev,
556                                 "FCP adapter maximum QTCB size (%d bytes) "
557                                 "is too small\n",
558                                 bottom->max_qtcb_size);
559                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
560                         return;
561                 }
562                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
563                                 &adapter->status);
564                 break;
565         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
566                 fc_host_node_name(shost) = 0;
567                 fc_host_port_name(shost) = 0;
568                 fc_host_port_id(shost) = 0;
569                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
570                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
571                 adapter->hydra_version = 0;
572
573                 /* avoids adapter shutdown to be able to recognize
574                  * events such as LINK UP */
575                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
576                                 &adapter->status);
577                 zfcp_fsf_link_down_info_eval(req,
578                         &qtcb->header.fsf_status_qual.link_down_info);
579                 if (zfcp_fsf_exchange_config_evaluate(req))
580                         return;
581                 break;
582         default:
583                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
584                 return;
585         }
586
587         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
588                 adapter->hardware_version = bottom->hardware_version;
589                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
590                        min(FC_SERIAL_NUMBER_SIZE, 17));
591                 EBCASC(fc_host_serial_number(shost),
592                        min(FC_SERIAL_NUMBER_SIZE, 17));
593         }
594
595         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
596                 dev_err(&adapter->ccw_device->dev,
597                         "The FCP adapter only supports newer "
598                         "control block versions\n");
599                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
600                 return;
601         }
602         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
603                 dev_err(&adapter->ccw_device->dev,
604                         "The FCP adapter only supports older "
605                         "control block versions\n");
606                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
607         }
608 }
609
610 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
611 {
612         struct zfcp_adapter *adapter = req->adapter;
613         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
614         struct Scsi_Host *shost = adapter->scsi_host;
615
616         if (req->data)
617                 memcpy(req->data, bottom, sizeof(*bottom));
618
619         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
620                 fc_host_permanent_port_name(shost) = bottom->wwpn;
621                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
622         } else
623                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
624         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
625         fc_host_supported_speeds(shost) =
626                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
627         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
628                FC_FC4_LIST_SIZE);
629         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
630                FC_FC4_LIST_SIZE);
631 }
632
633 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
634 {
635         struct fsf_qtcb *qtcb = req->qtcb;
636
637         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
638                 return;
639
640         switch (qtcb->header.fsf_status) {
641         case FSF_GOOD:
642                 zfcp_fsf_exchange_port_evaluate(req);
643                 break;
644         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
645                 zfcp_fsf_exchange_port_evaluate(req);
646                 zfcp_fsf_link_down_info_eval(req,
647                         &qtcb->header.fsf_status_qual.link_down_info);
648                 break;
649         }
650 }
651
652 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
653 {
654         struct zfcp_fsf_req *req;
655
656         if (likely(pool))
657                 req = mempool_alloc(pool, GFP_ATOMIC);
658         else
659                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
660
661         if (unlikely(!req))
662                 return NULL;
663
664         memset(req, 0, sizeof(*req));
665         req->pool = pool;
666         return req;
667 }
668
669 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
670 {
671         struct fsf_qtcb *qtcb;
672
673         if (likely(pool))
674                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
675         else
676                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
677
678         if (unlikely(!qtcb))
679                 return NULL;
680
681         memset(qtcb, 0, sizeof(*qtcb));
682         return qtcb;
683 }
684
685 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
686                                                 u32 fsf_cmd, u8 sbtype,
687                                                 mempool_t *pool)
688 {
689         struct zfcp_adapter *adapter = qdio->adapter;
690         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
691
692         if (unlikely(!req))
693                 return ERR_PTR(-ENOMEM);
694
695         if (adapter->req_no == 0)
696                 adapter->req_no++;
697
698         INIT_LIST_HEAD(&req->list);
699         init_timer(&req->timer);
700         init_completion(&req->completion);
701
702         req->adapter = adapter;
703         req->fsf_command = fsf_cmd;
704         req->req_id = adapter->req_no;
705
706         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
707                 if (likely(pool))
708                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
709                 else
710                         req->qtcb = zfcp_qtcb_alloc(NULL);
711
712                 if (unlikely(!req->qtcb)) {
713                         zfcp_fsf_req_free(req);
714                         return ERR_PTR(-ENOMEM);
715                 }
716
717                 req->seq_no = adapter->fsf_req_seq_no;
718                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
719                 req->qtcb->prefix.req_id = req->req_id;
720                 req->qtcb->prefix.ulp_info = 26;
721                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
722                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
723                 req->qtcb->header.req_handle = req->req_id;
724                 req->qtcb->header.fsf_command = req->fsf_command;
725         }
726
727         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
728                            req->qtcb, sizeof(struct fsf_qtcb));
729
730         return req;
731 }
732
733 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
734 {
735         struct zfcp_adapter *adapter = req->adapter;
736         struct zfcp_qdio *qdio = adapter->qdio;
737         int with_qtcb = (req->qtcb != NULL);
738         int req_id = req->req_id;
739
740         zfcp_reqlist_add(adapter->req_list, req);
741
742         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
743         req->issued = get_clock();
744         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
745                 del_timer(&req->timer);
746                 /* lookup request again, list might have changed */
747                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
748                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
749                 return -EIO;
750         }
751
752         /* Don't increase for unsolicited status */
753         if (with_qtcb)
754                 adapter->fsf_req_seq_no++;
755         adapter->req_no++;
756
757         return 0;
758 }
759
760 /**
761  * zfcp_fsf_status_read - send status read request
762  * @adapter: pointer to struct zfcp_adapter
763  * @req_flags: request flags
764  * Returns: 0 on success, ERROR otherwise
765  */
766 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
767 {
768         struct zfcp_adapter *adapter = qdio->adapter;
769         struct zfcp_fsf_req *req;
770         struct fsf_status_read_buffer *sr_buf;
771         struct page *page;
772         int retval = -EIO;
773
774         spin_lock_irq(&qdio->req_q_lock);
775         if (zfcp_qdio_sbal_get(qdio))
776                 goto out;
777
778         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
779                                   adapter->pool.status_read_req);
780         if (IS_ERR(req)) {
781                 retval = PTR_ERR(req);
782                 goto out;
783         }
784
785         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
786         if (!page) {
787                 retval = -ENOMEM;
788                 goto failed_buf;
789         }
790         sr_buf = page_address(page);
791         memset(sr_buf, 0, sizeof(*sr_buf));
792         req->data = sr_buf;
793
794         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
795         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
796
797         retval = zfcp_fsf_req_send(req);
798         if (retval)
799                 goto failed_req_send;
800
801         goto out;
802
803 failed_req_send:
804         req->data = NULL;
805         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
806 failed_buf:
807         zfcp_dbf_hba_fsf_uss("fssr__1", req);
808         zfcp_fsf_req_free(req);
809 out:
810         spin_unlock_irq(&qdio->req_q_lock);
811         return retval;
812 }
813
814 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
815 {
816         struct scsi_device *sdev = req->data;
817         struct zfcp_scsi_dev *zfcp_sdev;
818         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
819
820         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
821                 return;
822
823         zfcp_sdev = sdev_to_zfcp(sdev);
824
825         switch (req->qtcb->header.fsf_status) {
826         case FSF_PORT_HANDLE_NOT_VALID:
827                 if (fsq->word[0] == fsq->word[1]) {
828                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
829                                                 "fsafch1");
830                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
831                 }
832                 break;
833         case FSF_LUN_HANDLE_NOT_VALID:
834                 if (fsq->word[0] == fsq->word[1]) {
835                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
836                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
837                 }
838                 break;
839         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
840                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
841                 break;
842         case FSF_PORT_BOXED:
843                 zfcp_erp_set_port_status(zfcp_sdev->port,
844                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
845                 zfcp_erp_port_reopen(zfcp_sdev->port,
846                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
847                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
848                 break;
849         case FSF_LUN_BOXED:
850                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
851                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
852                                     "fsafch4");
853                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
854                 break;
855         case FSF_ADAPTER_STATUS_AVAILABLE:
856                 switch (fsq->word[0]) {
857                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
858                         zfcp_fc_test_link(zfcp_sdev->port);
859                         /* fall through */
860                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
861                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
862                         break;
863                 }
864                 break;
865         case FSF_GOOD:
866                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
867                 break;
868         }
869 }
870
871 /**
872  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
873  * @scmnd: The SCSI command to abort
874  * Returns: pointer to struct zfcp_fsf_req
875  */
876
877 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
878 {
879         struct zfcp_fsf_req *req = NULL;
880         struct scsi_device *sdev = scmnd->device;
881         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
882         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
883         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
884
885         spin_lock_irq(&qdio->req_q_lock);
886         if (zfcp_qdio_sbal_get(qdio))
887                 goto out;
888         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
889                                   SBAL_SFLAGS0_TYPE_READ,
890                                   qdio->adapter->pool.scsi_abort);
891         if (IS_ERR(req)) {
892                 req = NULL;
893                 goto out;
894         }
895
896         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
897                        ZFCP_STATUS_COMMON_UNBLOCKED)))
898                 goto out_error_free;
899
900         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
901
902         req->data = sdev;
903         req->handler = zfcp_fsf_abort_fcp_command_handler;
904         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
905         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
906         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
907
908         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
909         if (!zfcp_fsf_req_send(req))
910                 goto out;
911
912 out_error_free:
913         zfcp_fsf_req_free(req);
914         req = NULL;
915 out:
916         spin_unlock_irq(&qdio->req_q_lock);
917         return req;
918 }
919
920 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
921 {
922         struct zfcp_adapter *adapter = req->adapter;
923         struct zfcp_fsf_ct_els *ct = req->data;
924         struct fsf_qtcb_header *header = &req->qtcb->header;
925
926         ct->status = -EINVAL;
927
928         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
929                 goto skip_fsfstatus;
930
931         switch (header->fsf_status) {
932         case FSF_GOOD:
933                 zfcp_dbf_san_res("fsscth2", req);
934                 ct->status = 0;
935                 break;
936         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
937                 zfcp_fsf_class_not_supp(req);
938                 break;
939         case FSF_ADAPTER_STATUS_AVAILABLE:
940                 switch (header->fsf_status_qual.word[0]){
941                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
942                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
943                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
944                         break;
945                 }
946                 break;
947         case FSF_ACCESS_DENIED:
948                 break;
949         case FSF_PORT_BOXED:
950                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
951                 break;
952         case FSF_PORT_HANDLE_NOT_VALID:
953                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
954                 /* fall through */
955         case FSF_GENERIC_COMMAND_REJECTED:
956         case FSF_PAYLOAD_SIZE_MISMATCH:
957         case FSF_REQUEST_SIZE_TOO_LARGE:
958         case FSF_RESPONSE_SIZE_TOO_LARGE:
959         case FSF_SBAL_MISMATCH:
960                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
961                 break;
962         }
963
964 skip_fsfstatus:
965         if (ct->handler)
966                 ct->handler(ct->handler_data);
967 }
968
969 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
970                                             struct zfcp_qdio_req *q_req,
971                                             struct scatterlist *sg_req,
972                                             struct scatterlist *sg_resp)
973 {
974         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
975         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
976         zfcp_qdio_set_sbale_last(qdio, q_req);
977 }
978
979 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
980                                        struct scatterlist *sg_req,
981                                        struct scatterlist *sg_resp)
982 {
983         struct zfcp_adapter *adapter = req->adapter;
984         struct zfcp_qdio *qdio = adapter->qdio;
985         struct fsf_qtcb *qtcb = req->qtcb;
986         u32 feat = adapter->adapter_features;
987
988         if (zfcp_adapter_multi_buffer_active(adapter)) {
989                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
990                         return -EIO;
991                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
992                         return -EIO;
993
994                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
995                                         zfcp_qdio_sbale_count(sg_req));
996                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
997                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
998                 return 0;
999         }
1000
1001         /* use single, unchained SBAL if it can hold the request */
1002         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1003                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1004                                                 sg_req, sg_resp);
1005                 return 0;
1006         }
1007
1008         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1009                 return -EOPNOTSUPP;
1010
1011         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1012                 return -EIO;
1013
1014         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1015
1016         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1017         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1018
1019         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1020                 return -EIO;
1021
1022         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1023
1024         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1025
1026         return 0;
1027 }
1028
1029 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1030                                  struct scatterlist *sg_req,
1031                                  struct scatterlist *sg_resp,
1032                                  unsigned int timeout)
1033 {
1034         int ret;
1035
1036         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1037         if (ret)
1038                 return ret;
1039
1040         /* common settings for ct/gs and els requests */
1041         if (timeout > 255)
1042                 timeout = 255; /* max value accepted by hardware */
1043         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1044         req->qtcb->bottom.support.timeout = timeout;
1045         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1046
1047         return 0;
1048 }
1049
1050 /**
1051  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1052  * @ct: pointer to struct zfcp_send_ct with data for request
1053  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1054  */
1055 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1056                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1057                      unsigned int timeout)
1058 {
1059         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1060         struct zfcp_fsf_req *req;
1061         int ret = -EIO;
1062
1063         spin_lock_irq(&qdio->req_q_lock);
1064         if (zfcp_qdio_sbal_get(qdio))
1065                 goto out;
1066
1067         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1068                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1069
1070         if (IS_ERR(req)) {
1071                 ret = PTR_ERR(req);
1072                 goto out;
1073         }
1074
1075         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1076         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1077         if (ret)
1078                 goto failed_send;
1079
1080         req->handler = zfcp_fsf_send_ct_handler;
1081         req->qtcb->header.port_handle = wka_port->handle;
1082         req->data = ct;
1083
1084         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1085
1086         ret = zfcp_fsf_req_send(req);
1087         if (ret)
1088                 goto failed_send;
1089
1090         goto out;
1091
1092 failed_send:
1093         zfcp_fsf_req_free(req);
1094 out:
1095         spin_unlock_irq(&qdio->req_q_lock);
1096         return ret;
1097 }
1098
1099 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1100 {
1101         struct zfcp_fsf_ct_els *send_els = req->data;
1102         struct zfcp_port *port = send_els->port;
1103         struct fsf_qtcb_header *header = &req->qtcb->header;
1104
1105         send_els->status = -EINVAL;
1106
1107         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1108                 goto skip_fsfstatus;
1109
1110         switch (header->fsf_status) {
1111         case FSF_GOOD:
1112                 zfcp_dbf_san_res("fsselh1", req);
1113                 send_els->status = 0;
1114                 break;
1115         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1116                 zfcp_fsf_class_not_supp(req);
1117                 break;
1118         case FSF_ADAPTER_STATUS_AVAILABLE:
1119                 switch (header->fsf_status_qual.word[0]){
1120                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1121                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1122                 case FSF_SQ_RETRY_IF_POSSIBLE:
1123                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1124                         break;
1125                 }
1126                 break;
1127         case FSF_ELS_COMMAND_REJECTED:
1128         case FSF_PAYLOAD_SIZE_MISMATCH:
1129         case FSF_REQUEST_SIZE_TOO_LARGE:
1130         case FSF_RESPONSE_SIZE_TOO_LARGE:
1131                 break;
1132         case FSF_ACCESS_DENIED:
1133                 if (port) {
1134                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1135                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1136                 }
1137                 break;
1138         case FSF_SBAL_MISMATCH:
1139                 /* should never occur, avoided in zfcp_fsf_send_els */
1140                 /* fall through */
1141         default:
1142                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1143                 break;
1144         }
1145 skip_fsfstatus:
1146         if (send_els->handler)
1147                 send_els->handler(send_els->handler_data);
1148 }
1149
1150 /**
1151  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1152  * @els: pointer to struct zfcp_send_els with data for the command
1153  */
1154 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1155                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1156 {
1157         struct zfcp_fsf_req *req;
1158         struct zfcp_qdio *qdio = adapter->qdio;
1159         int ret = -EIO;
1160
1161         spin_lock_irq(&qdio->req_q_lock);
1162         if (zfcp_qdio_sbal_get(qdio))
1163                 goto out;
1164
1165         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1166                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1167
1168         if (IS_ERR(req)) {
1169                 ret = PTR_ERR(req);
1170                 goto out;
1171         }
1172
1173         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1174
1175         if (!zfcp_adapter_multi_buffer_active(adapter))
1176                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1177
1178         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1179
1180         if (ret)
1181                 goto failed_send;
1182
1183         hton24(req->qtcb->bottom.support.d_id, d_id);
1184         req->handler = zfcp_fsf_send_els_handler;
1185         req->data = els;
1186
1187         zfcp_dbf_san_req("fssels1", req, d_id);
1188
1189         ret = zfcp_fsf_req_send(req);
1190         if (ret)
1191                 goto failed_send;
1192
1193         goto out;
1194
1195 failed_send:
1196         zfcp_fsf_req_free(req);
1197 out:
1198         spin_unlock_irq(&qdio->req_q_lock);
1199         return ret;
1200 }
1201
1202 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1203 {
1204         struct zfcp_fsf_req *req;
1205         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1206         int retval = -EIO;
1207
1208         spin_lock_irq(&qdio->req_q_lock);
1209         if (zfcp_qdio_sbal_get(qdio))
1210                 goto out;
1211
1212         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1213                                   SBAL_SFLAGS0_TYPE_READ,
1214                                   qdio->adapter->pool.erp_req);
1215
1216         if (IS_ERR(req)) {
1217                 retval = PTR_ERR(req);
1218                 goto out;
1219         }
1220
1221         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1222         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1223
1224         req->qtcb->bottom.config.feature_selection =
1225                         FSF_FEATURE_CFDC |
1226                         FSF_FEATURE_LUN_SHARING |
1227                         FSF_FEATURE_NOTIFICATION_LOST |
1228                         FSF_FEATURE_UPDATE_ALERT;
1229         req->erp_action = erp_action;
1230         req->handler = zfcp_fsf_exchange_config_data_handler;
1231         erp_action->fsf_req_id = req->req_id;
1232
1233         zfcp_fsf_start_erp_timer(req);
1234         retval = zfcp_fsf_req_send(req);
1235         if (retval) {
1236                 zfcp_fsf_req_free(req);
1237                 erp_action->fsf_req_id = 0;
1238         }
1239 out:
1240         spin_unlock_irq(&qdio->req_q_lock);
1241         return retval;
1242 }
1243
1244 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1245                                        struct fsf_qtcb_bottom_config *data)
1246 {
1247         struct zfcp_fsf_req *req = NULL;
1248         int retval = -EIO;
1249
1250         spin_lock_irq(&qdio->req_q_lock);
1251         if (zfcp_qdio_sbal_get(qdio))
1252                 goto out_unlock;
1253
1254         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1255                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1256
1257         if (IS_ERR(req)) {
1258                 retval = PTR_ERR(req);
1259                 goto out_unlock;
1260         }
1261
1262         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1263         req->handler = zfcp_fsf_exchange_config_data_handler;
1264
1265         req->qtcb->bottom.config.feature_selection =
1266                         FSF_FEATURE_CFDC |
1267                         FSF_FEATURE_LUN_SHARING |
1268                         FSF_FEATURE_NOTIFICATION_LOST |
1269                         FSF_FEATURE_UPDATE_ALERT;
1270
1271         if (data)
1272                 req->data = data;
1273
1274         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1275         retval = zfcp_fsf_req_send(req);
1276         spin_unlock_irq(&qdio->req_q_lock);
1277         if (!retval)
1278                 wait_for_completion(&req->completion);
1279
1280         zfcp_fsf_req_free(req);
1281         return retval;
1282
1283 out_unlock:
1284         spin_unlock_irq(&qdio->req_q_lock);
1285         return retval;
1286 }
1287
1288 /**
1289  * zfcp_fsf_exchange_port_data - request information about local port
1290  * @erp_action: ERP action for the adapter for which port data is requested
1291  * Returns: 0 on success, error otherwise
1292  */
1293 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1294 {
1295         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1296         struct zfcp_fsf_req *req;
1297         int retval = -EIO;
1298
1299         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1300                 return -EOPNOTSUPP;
1301
1302         spin_lock_irq(&qdio->req_q_lock);
1303         if (zfcp_qdio_sbal_get(qdio))
1304                 goto out;
1305
1306         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1307                                   SBAL_SFLAGS0_TYPE_READ,
1308                                   qdio->adapter->pool.erp_req);
1309
1310         if (IS_ERR(req)) {
1311                 retval = PTR_ERR(req);
1312                 goto out;
1313         }
1314
1315         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1316         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1317
1318         req->handler = zfcp_fsf_exchange_port_data_handler;
1319         req->erp_action = erp_action;
1320         erp_action->fsf_req_id = req->req_id;
1321
1322         zfcp_fsf_start_erp_timer(req);
1323         retval = zfcp_fsf_req_send(req);
1324         if (retval) {
1325                 zfcp_fsf_req_free(req);
1326                 erp_action->fsf_req_id = 0;
1327         }
1328 out:
1329         spin_unlock_irq(&qdio->req_q_lock);
1330         return retval;
1331 }
1332
1333 /**
1334  * zfcp_fsf_exchange_port_data_sync - request information about local port
1335  * @qdio: pointer to struct zfcp_qdio
1336  * @data: pointer to struct fsf_qtcb_bottom_port
1337  * Returns: 0 on success, error otherwise
1338  */
1339 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1340                                      struct fsf_qtcb_bottom_port *data)
1341 {
1342         struct zfcp_fsf_req *req = NULL;
1343         int retval = -EIO;
1344
1345         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1346                 return -EOPNOTSUPP;
1347
1348         spin_lock_irq(&qdio->req_q_lock);
1349         if (zfcp_qdio_sbal_get(qdio))
1350                 goto out_unlock;
1351
1352         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1353                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1354
1355         if (IS_ERR(req)) {
1356                 retval = PTR_ERR(req);
1357                 goto out_unlock;
1358         }
1359
1360         if (data)
1361                 req->data = data;
1362
1363         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1364
1365         req->handler = zfcp_fsf_exchange_port_data_handler;
1366         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1367         retval = zfcp_fsf_req_send(req);
1368         spin_unlock_irq(&qdio->req_q_lock);
1369
1370         if (!retval)
1371                 wait_for_completion(&req->completion);
1372
1373         zfcp_fsf_req_free(req);
1374
1375         return retval;
1376
1377 out_unlock:
1378         spin_unlock_irq(&qdio->req_q_lock);
1379         return retval;
1380 }
1381
1382 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1383 {
1384         struct zfcp_port *port = req->data;
1385         struct fsf_qtcb_header *header = &req->qtcb->header;
1386         struct fc_els_flogi *plogi;
1387
1388         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1389                 goto out;
1390
1391         switch (header->fsf_status) {
1392         case FSF_PORT_ALREADY_OPEN:
1393                 break;
1394         case FSF_ACCESS_DENIED:
1395                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1396                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1397                 break;
1398         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1399                 dev_warn(&req->adapter->ccw_device->dev,
1400                          "Not enough FCP adapter resources to open "
1401                          "remote port 0x%016Lx\n",
1402                          (unsigned long long)port->wwpn);
1403                 zfcp_erp_set_port_status(port,
1404                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1405                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1406                 break;
1407         case FSF_ADAPTER_STATUS_AVAILABLE:
1408                 switch (header->fsf_status_qual.word[0]) {
1409                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1410                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1411                 case FSF_SQ_NO_RETRY_POSSIBLE:
1412                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1413                         break;
1414                 }
1415                 break;
1416         case FSF_GOOD:
1417                 port->handle = header->port_handle;
1418                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1419                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1420                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1421                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1422                                   &port->status);
1423                 /* check whether D_ID has changed during open */
1424                 /*
1425                  * FIXME: This check is not airtight, as the FCP channel does
1426                  * not monitor closures of target port connections caused on
1427                  * the remote side. Thus, they might miss out on invalidating
1428                  * locally cached WWPNs (and other N_Port parameters) of gone
1429                  * target ports. So, our heroic attempt to make things safe
1430                  * could be undermined by 'open port' response data tagged with
1431                  * obsolete WWPNs. Another reason to monitor potential
1432                  * connection closures ourself at least (by interpreting
1433                  * incoming ELS' and unsolicited status). It just crosses my
1434                  * mind that one should be able to cross-check by means of
1435                  * another GID_PN straight after a port has been opened.
1436                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1437                  */
1438                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1439                 if (req->qtcb->bottom.support.els1_length >=
1440                     FSF_PLOGI_MIN_LEN)
1441                                 zfcp_fc_plogi_evaluate(port, plogi);
1442                 break;
1443         case FSF_UNKNOWN_OP_SUBTYPE:
1444                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1445                 break;
1446         }
1447
1448 out:
1449         put_device(&port->dev);
1450 }
1451
1452 /**
1453  * zfcp_fsf_open_port - create and send open port request
1454  * @erp_action: pointer to struct zfcp_erp_action
1455  * Returns: 0 on success, error otherwise
1456  */
1457 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1458 {
1459         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1460         struct zfcp_port *port = erp_action->port;
1461         struct zfcp_fsf_req *req;
1462         int retval = -EIO;
1463
1464         spin_lock_irq(&qdio->req_q_lock);
1465         if (zfcp_qdio_sbal_get(qdio))
1466                 goto out;
1467
1468         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1469                                   SBAL_SFLAGS0_TYPE_READ,
1470                                   qdio->adapter->pool.erp_req);
1471
1472         if (IS_ERR(req)) {
1473                 retval = PTR_ERR(req);
1474                 goto out;
1475         }
1476
1477         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1478         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1479
1480         req->handler = zfcp_fsf_open_port_handler;
1481         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1482         req->data = port;
1483         req->erp_action = erp_action;
1484         erp_action->fsf_req_id = req->req_id;
1485         get_device(&port->dev);
1486
1487         zfcp_fsf_start_erp_timer(req);
1488         retval = zfcp_fsf_req_send(req);
1489         if (retval) {
1490                 zfcp_fsf_req_free(req);
1491                 erp_action->fsf_req_id = 0;
1492                 put_device(&port->dev);
1493         }
1494 out:
1495         spin_unlock_irq(&qdio->req_q_lock);
1496         return retval;
1497 }
1498
1499 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1500 {
1501         struct zfcp_port *port = req->data;
1502
1503         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1504                 return;
1505
1506         switch (req->qtcb->header.fsf_status) {
1507         case FSF_PORT_HANDLE_NOT_VALID:
1508                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1509                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1510                 break;
1511         case FSF_ADAPTER_STATUS_AVAILABLE:
1512                 break;
1513         case FSF_GOOD:
1514                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1515                 break;
1516         }
1517 }
1518
1519 /**
1520  * zfcp_fsf_close_port - create and send close port request
1521  * @erp_action: pointer to struct zfcp_erp_action
1522  * Returns: 0 on success, error otherwise
1523  */
1524 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1525 {
1526         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1527         struct zfcp_fsf_req *req;
1528         int retval = -EIO;
1529
1530         spin_lock_irq(&qdio->req_q_lock);
1531         if (zfcp_qdio_sbal_get(qdio))
1532                 goto out;
1533
1534         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1535                                   SBAL_SFLAGS0_TYPE_READ,
1536                                   qdio->adapter->pool.erp_req);
1537
1538         if (IS_ERR(req)) {
1539                 retval = PTR_ERR(req);
1540                 goto out;
1541         }
1542
1543         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1544         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1545
1546         req->handler = zfcp_fsf_close_port_handler;
1547         req->data = erp_action->port;
1548         req->erp_action = erp_action;
1549         req->qtcb->header.port_handle = erp_action->port->handle;
1550         erp_action->fsf_req_id = req->req_id;
1551
1552         zfcp_fsf_start_erp_timer(req);
1553         retval = zfcp_fsf_req_send(req);
1554         if (retval) {
1555                 zfcp_fsf_req_free(req);
1556                 erp_action->fsf_req_id = 0;
1557         }
1558 out:
1559         spin_unlock_irq(&qdio->req_q_lock);
1560         return retval;
1561 }
1562
1563 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1564 {
1565         struct zfcp_fc_wka_port *wka_port = req->data;
1566         struct fsf_qtcb_header *header = &req->qtcb->header;
1567
1568         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1569                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1570                 goto out;
1571         }
1572
1573         switch (header->fsf_status) {
1574         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1575                 dev_warn(&req->adapter->ccw_device->dev,
1576                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1577                 /* fall through */
1578         case FSF_ADAPTER_STATUS_AVAILABLE:
1579                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1580                 /* fall through */
1581         case FSF_ACCESS_DENIED:
1582                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1583                 break;
1584         case FSF_GOOD:
1585                 wka_port->handle = header->port_handle;
1586                 /* fall through */
1587         case FSF_PORT_ALREADY_OPEN:
1588                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1589         }
1590 out:
1591         wake_up(&wka_port->completion_wq);
1592 }
1593
1594 /**
1595  * zfcp_fsf_open_wka_port - create and send open wka-port request
1596  * @wka_port: pointer to struct zfcp_fc_wka_port
1597  * Returns: 0 on success, error otherwise
1598  */
1599 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1600 {
1601         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1602         struct zfcp_fsf_req *req;
1603         int retval = -EIO;
1604
1605         spin_lock_irq(&qdio->req_q_lock);
1606         if (zfcp_qdio_sbal_get(qdio))
1607                 goto out;
1608
1609         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1610                                   SBAL_SFLAGS0_TYPE_READ,
1611                                   qdio->adapter->pool.erp_req);
1612
1613         if (IS_ERR(req)) {
1614                 retval = PTR_ERR(req);
1615                 goto out;
1616         }
1617
1618         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1619         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1620
1621         req->handler = zfcp_fsf_open_wka_port_handler;
1622         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1623         req->data = wka_port;
1624
1625         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1626         retval = zfcp_fsf_req_send(req);
1627         if (retval)
1628                 zfcp_fsf_req_free(req);
1629 out:
1630         spin_unlock_irq(&qdio->req_q_lock);
1631         return retval;
1632 }
1633
1634 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1635 {
1636         struct zfcp_fc_wka_port *wka_port = req->data;
1637
1638         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1639                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1640                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1641         }
1642
1643         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1644         wake_up(&wka_port->completion_wq);
1645 }
1646
1647 /**
1648  * zfcp_fsf_close_wka_port - create and send close wka port request
1649  * @wka_port: WKA port to open
1650  * Returns: 0 on success, error otherwise
1651  */
1652 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1653 {
1654         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1655         struct zfcp_fsf_req *req;
1656         int retval = -EIO;
1657
1658         spin_lock_irq(&qdio->req_q_lock);
1659         if (zfcp_qdio_sbal_get(qdio))
1660                 goto out;
1661
1662         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1663                                   SBAL_SFLAGS0_TYPE_READ,
1664                                   qdio->adapter->pool.erp_req);
1665
1666         if (IS_ERR(req)) {
1667                 retval = PTR_ERR(req);
1668                 goto out;
1669         }
1670
1671         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1672         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1673
1674         req->handler = zfcp_fsf_close_wka_port_handler;
1675         req->data = wka_port;
1676         req->qtcb->header.port_handle = wka_port->handle;
1677
1678         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1679         retval = zfcp_fsf_req_send(req);
1680         if (retval)
1681                 zfcp_fsf_req_free(req);
1682 out:
1683         spin_unlock_irq(&qdio->req_q_lock);
1684         return retval;
1685 }
1686
1687 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1688 {
1689         struct zfcp_port *port = req->data;
1690         struct fsf_qtcb_header *header = &req->qtcb->header;
1691         struct scsi_device *sdev;
1692
1693         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1694                 return;
1695
1696         switch (header->fsf_status) {
1697         case FSF_PORT_HANDLE_NOT_VALID:
1698                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1699                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1700                 break;
1701         case FSF_ACCESS_DENIED:
1702                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1703                 break;
1704         case FSF_PORT_BOXED:
1705                 /* can't use generic zfcp_erp_modify_port_status because
1706                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1707                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1708                 shost_for_each_device(sdev, port->adapter->scsi_host)
1709                         if (sdev_to_zfcp(sdev)->port == port)
1710                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1711                                                   &sdev_to_zfcp(sdev)->status);
1712                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1713                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1714                                      "fscpph2");
1715                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1716                 break;
1717         case FSF_ADAPTER_STATUS_AVAILABLE:
1718                 switch (header->fsf_status_qual.word[0]) {
1719                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1720                         /* fall through */
1721                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1722                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1723                         break;
1724                 }
1725                 break;
1726         case FSF_GOOD:
1727                 /* can't use generic zfcp_erp_modify_port_status because
1728                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1729                  */
1730                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1731                 shost_for_each_device(sdev, port->adapter->scsi_host)
1732                         if (sdev_to_zfcp(sdev)->port == port)
1733                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1734                                                   &sdev_to_zfcp(sdev)->status);
1735                 break;
1736         }
1737 }
1738
1739 /**
1740  * zfcp_fsf_close_physical_port - close physical port
1741  * @erp_action: pointer to struct zfcp_erp_action
1742  * Returns: 0 on success
1743  */
1744 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1745 {
1746         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1747         struct zfcp_fsf_req *req;
1748         int retval = -EIO;
1749
1750         spin_lock_irq(&qdio->req_q_lock);
1751         if (zfcp_qdio_sbal_get(qdio))
1752                 goto out;
1753
1754         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1755                                   SBAL_SFLAGS0_TYPE_READ,
1756                                   qdio->adapter->pool.erp_req);
1757
1758         if (IS_ERR(req)) {
1759                 retval = PTR_ERR(req);
1760                 goto out;
1761         }
1762
1763         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1764         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1765
1766         req->data = erp_action->port;
1767         req->qtcb->header.port_handle = erp_action->port->handle;
1768         req->erp_action = erp_action;
1769         req->handler = zfcp_fsf_close_physical_port_handler;
1770         erp_action->fsf_req_id = req->req_id;
1771
1772         zfcp_fsf_start_erp_timer(req);
1773         retval = zfcp_fsf_req_send(req);
1774         if (retval) {
1775                 zfcp_fsf_req_free(req);
1776                 erp_action->fsf_req_id = 0;
1777         }
1778 out:
1779         spin_unlock_irq(&qdio->req_q_lock);
1780         return retval;
1781 }
1782
1783 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1784 {
1785         struct zfcp_adapter *adapter = req->adapter;
1786         struct scsi_device *sdev = req->data;
1787         struct zfcp_scsi_dev *zfcp_sdev;
1788         struct fsf_qtcb_header *header = &req->qtcb->header;
1789         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1790
1791         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1792                 return;
1793
1794         zfcp_sdev = sdev_to_zfcp(sdev);
1795
1796         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1797                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1798                           ZFCP_STATUS_LUN_SHARED |
1799                           ZFCP_STATUS_LUN_READONLY,
1800                           &zfcp_sdev->status);
1801
1802         switch (header->fsf_status) {
1803
1804         case FSF_PORT_HANDLE_NOT_VALID:
1805                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1806                 /* fall through */
1807         case FSF_LUN_ALREADY_OPEN:
1808                 break;
1809         case FSF_ACCESS_DENIED:
1810                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1811                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812                 break;
1813         case FSF_PORT_BOXED:
1814                 zfcp_erp_set_port_status(zfcp_sdev->port,
1815                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1816                 zfcp_erp_port_reopen(zfcp_sdev->port,
1817                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1818                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1819                 break;
1820         case FSF_LUN_SHARING_VIOLATION:
1821                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1822                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1823                 break;
1824         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1825                 dev_warn(&adapter->ccw_device->dev,
1826                          "No handle is available for LUN "
1827                          "0x%016Lx on port 0x%016Lx\n",
1828                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1829                          (unsigned long long)zfcp_sdev->port->wwpn);
1830                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1831                 /* fall through */
1832         case FSF_INVALID_COMMAND_OPTION:
1833                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1834                 break;
1835         case FSF_ADAPTER_STATUS_AVAILABLE:
1836                 switch (header->fsf_status_qual.word[0]) {
1837                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1838                         zfcp_fc_test_link(zfcp_sdev->port);
1839                         /* fall through */
1840                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1841                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1842                         break;
1843                 }
1844                 break;
1845
1846         case FSF_GOOD:
1847                 zfcp_sdev->lun_handle = header->lun_handle;
1848                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1849                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1850                 break;
1851         }
1852 }
1853
1854 /**
1855  * zfcp_fsf_open_lun - open LUN
1856  * @erp_action: pointer to struct zfcp_erp_action
1857  * Returns: 0 on success, error otherwise
1858  */
1859 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1860 {
1861         struct zfcp_adapter *adapter = erp_action->adapter;
1862         struct zfcp_qdio *qdio = adapter->qdio;
1863         struct zfcp_fsf_req *req;
1864         int retval = -EIO;
1865
1866         spin_lock_irq(&qdio->req_q_lock);
1867         if (zfcp_qdio_sbal_get(qdio))
1868                 goto out;
1869
1870         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1871                                   SBAL_SFLAGS0_TYPE_READ,
1872                                   adapter->pool.erp_req);
1873
1874         if (IS_ERR(req)) {
1875                 retval = PTR_ERR(req);
1876                 goto out;
1877         }
1878
1879         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1880         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1881
1882         req->qtcb->header.port_handle = erp_action->port->handle;
1883         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1884         req->handler = zfcp_fsf_open_lun_handler;
1885         req->data = erp_action->sdev;
1886         req->erp_action = erp_action;
1887         erp_action->fsf_req_id = req->req_id;
1888
1889         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1890                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1891
1892         zfcp_fsf_start_erp_timer(req);
1893         retval = zfcp_fsf_req_send(req);
1894         if (retval) {
1895                 zfcp_fsf_req_free(req);
1896                 erp_action->fsf_req_id = 0;
1897         }
1898 out:
1899         spin_unlock_irq(&qdio->req_q_lock);
1900         return retval;
1901 }
1902
1903 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1904 {
1905         struct scsi_device *sdev = req->data;
1906         struct zfcp_scsi_dev *zfcp_sdev;
1907
1908         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1909                 return;
1910
1911         zfcp_sdev = sdev_to_zfcp(sdev);
1912
1913         switch (req->qtcb->header.fsf_status) {
1914         case FSF_PORT_HANDLE_NOT_VALID:
1915                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1916                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1917                 break;
1918         case FSF_LUN_HANDLE_NOT_VALID:
1919                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1920                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921                 break;
1922         case FSF_PORT_BOXED:
1923                 zfcp_erp_set_port_status(zfcp_sdev->port,
1924                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1925                 zfcp_erp_port_reopen(zfcp_sdev->port,
1926                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1927                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1928                 break;
1929         case FSF_ADAPTER_STATUS_AVAILABLE:
1930                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1931                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1932                         zfcp_fc_test_link(zfcp_sdev->port);
1933                         /* fall through */
1934                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1935                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1936                         break;
1937                 }
1938                 break;
1939         case FSF_GOOD:
1940                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1941                 break;
1942         }
1943 }
1944
1945 /**
1946  * zfcp_fsf_close_LUN - close LUN
1947  * @erp_action: pointer to erp_action triggering the "close LUN"
1948  * Returns: 0 on success, error otherwise
1949  */
1950 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1951 {
1952         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1953         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1954         struct zfcp_fsf_req *req;
1955         int retval = -EIO;
1956
1957         spin_lock_irq(&qdio->req_q_lock);
1958         if (zfcp_qdio_sbal_get(qdio))
1959                 goto out;
1960
1961         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1962                                   SBAL_SFLAGS0_TYPE_READ,
1963                                   qdio->adapter->pool.erp_req);
1964
1965         if (IS_ERR(req)) {
1966                 retval = PTR_ERR(req);
1967                 goto out;
1968         }
1969
1970         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1971         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1972
1973         req->qtcb->header.port_handle = erp_action->port->handle;
1974         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1975         req->handler = zfcp_fsf_close_lun_handler;
1976         req->data = erp_action->sdev;
1977         req->erp_action = erp_action;
1978         erp_action->fsf_req_id = req->req_id;
1979
1980         zfcp_fsf_start_erp_timer(req);
1981         retval = zfcp_fsf_req_send(req);
1982         if (retval) {
1983                 zfcp_fsf_req_free(req);
1984                 erp_action->fsf_req_id = 0;
1985         }
1986 out:
1987         spin_unlock_irq(&qdio->req_q_lock);
1988         return retval;
1989 }
1990
1991 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1992 {
1993         lat_rec->sum += lat;
1994         lat_rec->min = min(lat_rec->min, lat);
1995         lat_rec->max = max(lat_rec->max, lat);
1996 }
1997
1998 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1999 {
2000         struct fsf_qual_latency_info *lat_in;
2001         struct latency_cont *lat = NULL;
2002         struct zfcp_scsi_dev *zfcp_sdev;
2003         struct zfcp_blk_drv_data blktrc;
2004         int ticks = req->adapter->timer_ticks;
2005
2006         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2007
2008         blktrc.flags = 0;
2009         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2010         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2011                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2012         blktrc.inb_usage = 0;
2013         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2014
2015         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2016             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2017                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2018                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2019                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2020                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2021
2022                 switch (req->qtcb->bottom.io.data_direction) {
2023                 case FSF_DATADIR_DIF_READ_STRIP:
2024                 case FSF_DATADIR_DIF_READ_CONVERT:
2025                 case FSF_DATADIR_READ:
2026                         lat = &zfcp_sdev->latencies.read;
2027                         break;
2028                 case FSF_DATADIR_DIF_WRITE_INSERT:
2029                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2030                 case FSF_DATADIR_WRITE:
2031                         lat = &zfcp_sdev->latencies.write;
2032                         break;
2033                 case FSF_DATADIR_CMND:
2034                         lat = &zfcp_sdev->latencies.cmd;
2035                         break;
2036                 }
2037
2038                 if (lat) {
2039                         spin_lock(&zfcp_sdev->latencies.lock);
2040                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2041                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2042                         lat->counter++;
2043                         spin_unlock(&zfcp_sdev->latencies.lock);
2044                 }
2045         }
2046
2047         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2048                             sizeof(blktrc));
2049 }
2050
2051 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2052 {
2053         struct scsi_cmnd *scmnd = req->data;
2054         struct scsi_device *sdev = scmnd->device;
2055         struct zfcp_scsi_dev *zfcp_sdev;
2056         struct fsf_qtcb_header *header = &req->qtcb->header;
2057
2058         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2059                 return;
2060
2061         zfcp_sdev = sdev_to_zfcp(sdev);
2062
2063         switch (header->fsf_status) {
2064         case FSF_HANDLE_MISMATCH:
2065         case FSF_PORT_HANDLE_NOT_VALID:
2066                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2067                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2068                 break;
2069         case FSF_FCPLUN_NOT_VALID:
2070         case FSF_LUN_HANDLE_NOT_VALID:
2071                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2072                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2073                 break;
2074         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2075                 zfcp_fsf_class_not_supp(req);
2076                 break;
2077         case FSF_ACCESS_DENIED:
2078                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2079                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2080                 break;
2081         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2082                 dev_err(&req->adapter->ccw_device->dev,
2083                         "Incorrect direction %d, LUN 0x%016Lx on port "
2084                         "0x%016Lx closed\n",
2085                         req->qtcb->bottom.io.data_direction,
2086                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2087                         (unsigned long long)zfcp_sdev->port->wwpn);
2088                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2089                                           "fssfch3");
2090                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2091                 break;
2092         case FSF_CMND_LENGTH_NOT_VALID:
2093                 dev_err(&req->adapter->ccw_device->dev,
2094                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2095                         "port 0x%016Lx closed\n",
2096                         req->qtcb->bottom.io.fcp_cmnd_length,
2097                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2098                         (unsigned long long)zfcp_sdev->port->wwpn);
2099                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2100                                           "fssfch4");
2101                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2102                 break;
2103         case FSF_PORT_BOXED:
2104                 zfcp_erp_set_port_status(zfcp_sdev->port,
2105                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2106                 zfcp_erp_port_reopen(zfcp_sdev->port,
2107                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2108                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2109                 break;
2110         case FSF_LUN_BOXED:
2111                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2112                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2113                                     "fssfch6");
2114                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2115                 break;
2116         case FSF_ADAPTER_STATUS_AVAILABLE:
2117                 if (header->fsf_status_qual.word[0] ==
2118                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2119                         zfcp_fc_test_link(zfcp_sdev->port);
2120                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2121                 break;
2122         }
2123 }
2124
2125 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2126 {
2127         struct scsi_cmnd *scpnt;
2128         struct fcp_resp_with_ext *fcp_rsp;
2129         unsigned long flags;
2130
2131         read_lock_irqsave(&req->adapter->abort_lock, flags);
2132
2133         scpnt = req->data;
2134         if (unlikely(!scpnt)) {
2135                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2136                 return;
2137         }
2138
2139         zfcp_fsf_fcp_handler_common(req);
2140
2141         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2142                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2143                 goto skip_fsfstatus;
2144         }
2145
2146         switch (req->qtcb->header.fsf_status) {
2147         case FSF_INCONSISTENT_PROT_DATA:
2148         case FSF_INVALID_PROT_PARM:
2149                 set_host_byte(scpnt, DID_ERROR);
2150                 goto skip_fsfstatus;
2151         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2152                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2153                 goto skip_fsfstatus;
2154         case FSF_APP_TAG_CHECK_FAILURE:
2155                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2156                 goto skip_fsfstatus;
2157         case FSF_REF_TAG_CHECK_FAILURE:
2158                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2159                 goto skip_fsfstatus;
2160         }
2161         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2162         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2163
2164 skip_fsfstatus:
2165         zfcp_fsf_req_trace(req, scpnt);
2166         zfcp_dbf_scsi_result(scpnt, req);
2167
2168         scpnt->host_scribble = NULL;
2169         (scpnt->scsi_done) (scpnt);
2170         /*
2171          * We must hold this lock until scsi_done has been called.
2172          * Otherwise we may call scsi_done after abort regarding this
2173          * command has completed.
2174          * Note: scsi_done must not block!
2175          */
2176         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2177 }
2178
2179 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2180 {
2181         switch (scsi_get_prot_op(scsi_cmnd)) {
2182         case SCSI_PROT_NORMAL:
2183                 switch (scsi_cmnd->sc_data_direction) {
2184                 case DMA_NONE:
2185                         *data_dir = FSF_DATADIR_CMND;
2186                         break;
2187                 case DMA_FROM_DEVICE:
2188                         *data_dir = FSF_DATADIR_READ;
2189                         break;
2190                 case DMA_TO_DEVICE:
2191                         *data_dir = FSF_DATADIR_WRITE;
2192                         break;
2193                 case DMA_BIDIRECTIONAL:
2194                         return -EINVAL;
2195                 }
2196                 break;
2197
2198         case SCSI_PROT_READ_STRIP:
2199                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2200                 break;
2201         case SCSI_PROT_WRITE_INSERT:
2202                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2203                 break;
2204         case SCSI_PROT_READ_PASS:
2205                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2206                 break;
2207         case SCSI_PROT_WRITE_PASS:
2208                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2209                 break;
2210         default:
2211                 return -EINVAL;
2212         }
2213
2214         return 0;
2215 }
2216
2217 /**
2218  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2219  * @scsi_cmnd: scsi command to be sent
2220  */
2221 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2222 {
2223         struct zfcp_fsf_req *req;
2224         struct fcp_cmnd *fcp_cmnd;
2225         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2226         int retval = -EIO;
2227         struct scsi_device *sdev = scsi_cmnd->device;
2228         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2229         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2230         struct zfcp_qdio *qdio = adapter->qdio;
2231         struct fsf_qtcb_bottom_io *io;
2232         unsigned long flags;
2233
2234         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2235                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2236                 return -EBUSY;
2237
2238         spin_lock_irqsave(&qdio->req_q_lock, flags);
2239         if (atomic_read(&qdio->req_q_free) <= 0) {
2240                 atomic_inc(&qdio->req_q_full);
2241                 goto out;
2242         }
2243
2244         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2245                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2246
2247         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2248                                   sbtype, adapter->pool.scsi_req);
2249
2250         if (IS_ERR(req)) {
2251                 retval = PTR_ERR(req);
2252                 goto out;
2253         }
2254
2255         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2256
2257         io = &req->qtcb->bottom.io;
2258         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2259         req->data = scsi_cmnd;
2260         req->handler = zfcp_fsf_fcp_cmnd_handler;
2261         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2262         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2263         io->service_class = FSF_CLASS_3;
2264         io->fcp_cmnd_length = FCP_CMND_LEN;
2265
2266         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2267                 io->data_block_length = scsi_cmnd->device->sector_size;
2268                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2269         }
2270
2271         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2272                 goto failed_scsi_cmnd;
2273
2274         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2275         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2276
2277         if (scsi_prot_sg_count(scsi_cmnd)) {
2278                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2279                                        scsi_prot_sg_count(scsi_cmnd));
2280                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2281                                                  scsi_prot_sglist(scsi_cmnd));
2282                 if (retval)
2283                         goto failed_scsi_cmnd;
2284                 io->prot_data_length = zfcp_qdio_real_bytes(
2285                                                 scsi_prot_sglist(scsi_cmnd));
2286         }
2287
2288         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2289                                          scsi_sglist(scsi_cmnd));
2290         if (unlikely(retval))
2291                 goto failed_scsi_cmnd;
2292
2293         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2294         if (zfcp_adapter_multi_buffer_active(adapter))
2295                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2296
2297         retval = zfcp_fsf_req_send(req);
2298         if (unlikely(retval))
2299                 goto failed_scsi_cmnd;
2300
2301         goto out;
2302
2303 failed_scsi_cmnd:
2304         zfcp_fsf_req_free(req);
2305         scsi_cmnd->host_scribble = NULL;
2306 out:
2307         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2308         return retval;
2309 }
2310
2311 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2312 {
2313         struct fcp_resp_with_ext *fcp_rsp;
2314         struct fcp_resp_rsp_info *rsp_info;
2315
2316         zfcp_fsf_fcp_handler_common(req);
2317
2318         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2319         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2320
2321         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2322              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2323                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2324 }
2325
2326 /**
2327  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2328  * @scmnd: SCSI command to send the task management command for
2329  * @tm_flags: unsigned byte for task management flags
2330  * Returns: on success pointer to struct fsf_req, NULL otherwise
2331  */
2332 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2333                                             u8 tm_flags)
2334 {
2335         struct zfcp_fsf_req *req = NULL;
2336         struct fcp_cmnd *fcp_cmnd;
2337         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2338         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2339
2340         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2341                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2342                 return NULL;
2343
2344         spin_lock_irq(&qdio->req_q_lock);
2345         if (zfcp_qdio_sbal_get(qdio))
2346                 goto out;
2347
2348         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2349                                   SBAL_SFLAGS0_TYPE_WRITE,
2350                                   qdio->adapter->pool.scsi_req);
2351
2352         if (IS_ERR(req)) {
2353                 req = NULL;
2354                 goto out;
2355         }
2356
2357         req->data = scmnd;
2358         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2359         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2360         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2361         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2362         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2363         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2364
2365         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2366
2367         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2368         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2369
2370         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2371         if (!zfcp_fsf_req_send(req))
2372                 goto out;
2373
2374         zfcp_fsf_req_free(req);
2375         req = NULL;
2376 out:
2377         spin_unlock_irq(&qdio->req_q_lock);
2378         return req;
2379 }
2380
2381 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2382 {
2383 }
2384
2385 /**
2386  * zfcp_fsf_control_file - control file upload/download
2387  * @adapter: pointer to struct zfcp_adapter
2388  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2389  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2390  */
2391 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2392                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2393 {
2394         struct zfcp_qdio *qdio = adapter->qdio;
2395         struct zfcp_fsf_req *req = NULL;
2396         struct fsf_qtcb_bottom_support *bottom;
2397         int retval = -EIO;
2398         u8 direction;
2399
2400         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2401                 return ERR_PTR(-EOPNOTSUPP);
2402
2403         switch (fsf_cfdc->command) {
2404         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2405                 direction = SBAL_SFLAGS0_TYPE_WRITE;
2406                 break;
2407         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2408                 direction = SBAL_SFLAGS0_TYPE_READ;
2409                 break;
2410         default:
2411                 return ERR_PTR(-EINVAL);
2412         }
2413
2414         spin_lock_irq(&qdio->req_q_lock);
2415         if (zfcp_qdio_sbal_get(qdio))
2416                 goto out;
2417
2418         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2419         if (IS_ERR(req)) {
2420                 retval = -EPERM;
2421                 goto out;
2422         }
2423
2424         req->handler = zfcp_fsf_control_file_handler;
2425
2426         bottom = &req->qtcb->bottom.support;
2427         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2428         bottom->option = fsf_cfdc->option;
2429
2430         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2431
2432         if (retval ||
2433                 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2434                 zfcp_fsf_req_free(req);
2435                 retval = -EIO;
2436                 goto out;
2437         }
2438         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2439         if (zfcp_adapter_multi_buffer_active(adapter))
2440                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2441
2442         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2443         retval = zfcp_fsf_req_send(req);
2444 out:
2445         spin_unlock_irq(&qdio->req_q_lock);
2446
2447         if (!retval) {
2448                 wait_for_completion(&req->completion);
2449                 return req;
2450         }
2451         return ERR_PTR(retval);
2452 }
2453
2454 /**
2455  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2456  * @adapter: pointer to struct zfcp_adapter
2457  * @sbal_idx: response queue index of SBAL to be processed
2458  */
2459 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2460 {
2461         struct zfcp_adapter *adapter = qdio->adapter;
2462         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2463         struct qdio_buffer_element *sbale;
2464         struct zfcp_fsf_req *fsf_req;
2465         unsigned long req_id;
2466         int idx;
2467
2468         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2469
2470                 sbale = &sbal->element[idx];
2471                 req_id = (unsigned long) sbale->addr;
2472                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2473
2474                 if (!fsf_req) {
2475                         /*
2476                          * Unknown request means that we have potentially memory
2477                          * corruption and must stop the machine immediately.
2478                          */
2479                         zfcp_qdio_siosl(adapter);
2480                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2481                               req_id, dev_name(&adapter->ccw_device->dev));
2482                 }
2483
2484                 fsf_req->qdio_req.sbal_response = sbal_idx;
2485                 zfcp_fsf_req_complete(fsf_req);
2486
2487                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2488                         break;
2489         }
2490 }
2491
2492 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2493                                       struct qdio_buffer *sbal)
2494 {
2495         struct qdio_buffer_element *sbale = &sbal->element[0];
2496         u64 req_id = (unsigned long) sbale->addr;
2497
2498         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2499 }