4 * Implementation of FSF commands.
6 * Copyright IBM Corporation 2002, 2008
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12 #include <linux/blktrace_api.h>
15 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
16 #define ZFCP_REQ_NO_QTCB 0x00000008
18 static void zfcp_fsf_request_timeout_handler(unsigned long data)
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
43 /* association between FSF command and FSF QTCB type */
44 static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
62 u16 subtable = table >> 16;
63 u16 rule = table & 0xffff;
64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
66 if (subtable && subtable < ARRAY_SIZE(act_type))
67 dev_warn(&adapter->ccw_device->dev,
68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
77 "Access denied to port 0x%016Lx\n",
78 (unsigned long long)port->wwpn);
79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
81 zfcp_erp_port_access_denied(port, 55, req);
82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
95 zfcp_erp_unit_access_denied(unit, 59, req);
96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
103 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
113 if (likely(req->pool)) {
114 mempool_free(req, req->pool);
119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
126 * @adapter: pointer to struct zfcp_adapter
128 * Never ever call this without shutting down the adapter first.
129 * Otherwise the adapter would continue using and corrupting s390 storage.
130 * Included BUG_ON() call to ensure this is done.
131 * ERP is supposed to be the only user of this function.
133 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
135 struct zfcp_fsf_req *req, *tmp;
137 LIST_HEAD(remove_queue);
140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
141 spin_lock_irqsave(&adapter->req_list_lock, flags);
142 for (i = 0; i < REQUEST_LIST_SIZE; i++)
143 list_splice_init(&adapter->req_list[i], &remove_queue);
144 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
146 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
147 list_del(&req->list);
148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
149 zfcp_fsf_req_complete(req);
153 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
155 struct fsf_status_read_buffer *sr_buf = req->data;
156 struct zfcp_adapter *adapter = req->adapter;
157 struct zfcp_port *port;
158 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
161 read_lock_irqsave(&zfcp_data.config_lock, flags);
162 list_for_each_entry(port, &adapter->port_list_head, list)
163 if (port->d_id == d_id) {
164 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
165 zfcp_erp_port_reopen(port, 0, 101, req);
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
171 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
172 struct fsf_link_down_info *link_down)
174 struct zfcp_adapter *adapter = req->adapter;
176 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
179 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
184 switch (link_down->error_code) {
185 case FSF_PSQ_LINK_NO_LIGHT:
186 dev_warn(&req->adapter->ccw_device->dev,
187 "There is no light signal from the local "
188 "fibre channel cable\n");
190 case FSF_PSQ_LINK_WRAP_PLUG:
191 dev_warn(&req->adapter->ccw_device->dev,
192 "There is a wrap plug instead of a fibre "
195 case FSF_PSQ_LINK_NO_FCP:
196 dev_warn(&req->adapter->ccw_device->dev,
197 "The adjacent fibre channel node does not "
200 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
201 dev_warn(&req->adapter->ccw_device->dev,
202 "The FCP device is suspended because of a "
203 "firmware update\n");
205 case FSF_PSQ_LINK_INVALID_WWPN:
206 dev_warn(&req->adapter->ccw_device->dev,
207 "The FCP device detected a WWPN that is "
208 "duplicate or not valid\n");
210 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
211 dev_warn(&req->adapter->ccw_device->dev,
212 "The fibre channel fabric does not support NPIV\n");
214 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
215 dev_warn(&req->adapter->ccw_device->dev,
216 "The FCP adapter cannot support more NPIV ports\n");
218 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
219 dev_warn(&req->adapter->ccw_device->dev,
220 "The adjacent switch cannot support "
221 "more NPIV ports\n");
223 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
224 dev_warn(&req->adapter->ccw_device->dev,
225 "The FCP adapter could not log in to the "
226 "fibre channel fabric\n");
228 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
229 dev_warn(&req->adapter->ccw_device->dev,
230 "The WWPN assignment file on the FCP adapter "
231 "has been damaged\n");
233 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
234 dev_warn(&req->adapter->ccw_device->dev,
235 "The mode table on the FCP adapter "
236 "has been damaged\n");
238 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
239 dev_warn(&req->adapter->ccw_device->dev,
240 "All NPIV ports on the FCP adapter have "
244 dev_warn(&req->adapter->ccw_device->dev,
245 "The link between the FCP adapter and "
246 "the FC fabric is down\n");
249 zfcp_erp_adapter_failed(adapter, id, req);
252 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
254 struct fsf_status_read_buffer *sr_buf = req->data;
255 struct fsf_link_down_info *ldi =
256 (struct fsf_link_down_info *) &sr_buf->payload;
258 switch (sr_buf->status_subtype) {
259 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
260 zfcp_fsf_link_down_info_eval(req, 38, ldi);
262 case FSF_STATUS_READ_SUB_FDISC_FAILED:
263 zfcp_fsf_link_down_info_eval(req, 39, ldi);
265 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
266 zfcp_fsf_link_down_info_eval(req, 40, NULL);
270 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
272 struct zfcp_adapter *adapter = req->adapter;
273 struct fsf_status_read_buffer *sr_buf = req->data;
275 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
276 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
277 mempool_free(sr_buf, adapter->pool.data_status_read);
278 zfcp_fsf_req_free(req);
282 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
284 switch (sr_buf->status_type) {
285 case FSF_STATUS_READ_PORT_CLOSED:
286 zfcp_fsf_status_read_port_closed(req);
288 case FSF_STATUS_READ_INCOMING_ELS:
289 zfcp_fc_incoming_els(req);
291 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
293 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
294 dev_warn(&adapter->ccw_device->dev,
295 "The error threshold for checksum statistics "
296 "has been exceeded\n");
297 zfcp_hba_dbf_event_berr(adapter, req);
299 case FSF_STATUS_READ_LINK_DOWN:
300 zfcp_fsf_status_read_link_down(req);
302 case FSF_STATUS_READ_LINK_UP:
303 dev_info(&adapter->ccw_device->dev,
304 "The local link has been restored\n");
305 /* All ports should be marked as ready to run again */
306 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
307 ZFCP_STATUS_COMMON_RUNNING,
309 zfcp_erp_adapter_reopen(adapter,
310 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
311 ZFCP_STATUS_COMMON_ERP_FAILED,
314 case FSF_STATUS_READ_NOTIFICATION_LOST:
315 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
316 zfcp_erp_adapter_access_changed(adapter, 135, req);
317 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
318 schedule_work(&adapter->scan_work);
320 case FSF_STATUS_READ_CFDC_UPDATED:
321 zfcp_erp_adapter_access_changed(adapter, 136, req);
323 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
324 adapter->adapter_features = sr_buf->payload.word[0];
328 mempool_free(sr_buf, adapter->pool.data_status_read);
329 zfcp_fsf_req_free(req);
331 atomic_inc(&adapter->stat_miss);
332 queue_work(zfcp_data.work_queue, &adapter->stat_work);
335 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
337 switch (req->qtcb->header.fsf_status_qual.word[0]) {
338 case FSF_SQ_FCP_RSP_AVAILABLE:
339 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
340 case FSF_SQ_NO_RETRY_POSSIBLE:
341 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
343 case FSF_SQ_COMMAND_ABORTED:
344 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
346 case FSF_SQ_NO_RECOM:
347 dev_err(&req->adapter->ccw_device->dev,
348 "The FCP adapter reported a problem "
349 "that cannot be recovered\n");
350 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
353 /* all non-return stats set FSFREQ_ERROR*/
354 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
357 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
359 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
362 switch (req->qtcb->header.fsf_status) {
363 case FSF_UNKNOWN_COMMAND:
364 dev_err(&req->adapter->ccw_device->dev,
365 "The FCP adapter does not recognize the command 0x%x\n",
366 req->qtcb->header.fsf_command);
367 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
368 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
370 case FSF_ADAPTER_STATUS_AVAILABLE:
371 zfcp_fsf_fsfstatus_qual_eval(req);
376 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
378 struct zfcp_adapter *adapter = req->adapter;
379 struct fsf_qtcb *qtcb = req->qtcb;
380 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
382 zfcp_hba_dbf_event_fsf_response(req);
384 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
385 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
386 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
390 switch (qtcb->prefix.prot_status) {
392 case FSF_PROT_FSF_STATUS_PRESENTED:
394 case FSF_PROT_QTCB_VERSION_ERROR:
395 dev_err(&adapter->ccw_device->dev,
396 "QTCB version 0x%x not supported by FCP adapter "
397 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
398 psq->word[0], psq->word[1]);
399 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
401 case FSF_PROT_ERROR_STATE:
402 case FSF_PROT_SEQ_NUMB_ERROR:
403 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
404 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
406 case FSF_PROT_UNSUPP_QTCB_TYPE:
407 dev_err(&adapter->ccw_device->dev,
408 "The QTCB type is not supported by the FCP adapter\n");
409 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
411 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
412 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
415 case FSF_PROT_DUPLICATE_REQUEST_ID:
416 dev_err(&adapter->ccw_device->dev,
417 "0x%Lx is an ambiguous request identifier\n",
418 (unsigned long long)qtcb->bottom.support.req_handle);
419 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
421 case FSF_PROT_LINK_DOWN:
422 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
423 /* FIXME: reopening adapter now? better wait for link up */
424 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
426 case FSF_PROT_REEST_QUEUE:
427 /* All ports should be marked as ready to run again */
428 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
429 ZFCP_STATUS_COMMON_RUNNING,
431 zfcp_erp_adapter_reopen(adapter,
432 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
433 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
436 dev_err(&adapter->ccw_device->dev,
437 "0x%x is not a valid transfer protocol status\n",
438 qtcb->prefix.prot_status);
439 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
441 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
445 * zfcp_fsf_req_complete - process completion of a FSF request
446 * @fsf_req: The FSF request that has been completed.
448 * When a request has been completed either from the FCP adapter,
449 * or it has been dismissed due to a queue shutdown, this function
450 * is called to process the completion status and trigger further
451 * events related to the FSF request.
453 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
455 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
456 zfcp_fsf_status_read_handler(req);
460 del_timer(&req->timer);
461 zfcp_fsf_protstatus_eval(req);
462 zfcp_fsf_fsfstatus_eval(req);
466 zfcp_erp_notify(req->erp_action, 0);
467 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
469 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
470 zfcp_fsf_req_free(req);
472 /* notify initiator waiting for the requests completion */
474 * FIXME: Race! We must not access fsf_req here as it might have been
475 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
476 * flag. It's an improbable case. But, we have the same paranoia for
477 * the cleanup flag already.
478 * Might better be handled using complete()?
479 * (setting the flag and doing wakeup ought to be atomic
480 * with regard to checking the flag as long as waitqueue is
481 * part of the to be released structure)
483 wake_up(&req->completion_wq);
486 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
488 struct fsf_qtcb_bottom_config *bottom;
489 struct zfcp_adapter *adapter = req->adapter;
490 struct Scsi_Host *shost = adapter->scsi_host;
492 bottom = &req->qtcb->bottom.config;
495 memcpy(req->data, bottom, sizeof(*bottom));
497 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
498 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
499 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
500 fc_host_speed(shost) = bottom->fc_link_speed;
501 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
503 adapter->hydra_version = bottom->adapter_type;
504 adapter->timer_ticks = bottom->timer_interval;
506 if (fc_host_permanent_port_name(shost) == -1)
507 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
509 switch (bottom->fc_topology) {
511 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
512 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
513 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
514 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
516 case FSF_TOPO_FABRIC:
517 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
520 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
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, 127, req);
532 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
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;
539 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
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;
549 switch (qtcb->header.fsf_status) {
551 if (zfcp_fsf_exchange_config_evaluate(req))
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) "
558 bottom->max_qtcb_size);
559 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
562 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
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;
573 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
576 zfcp_fsf_link_down_info_eval(req, 42,
577 &qtcb->header.fsf_status_qual.link_down_info);
580 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
584 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
585 adapter->hardware_version = bottom->hardware_version;
586 memcpy(fc_host_serial_number(shost), bottom->serial_number,
587 min(FC_SERIAL_NUMBER_SIZE, 17));
588 EBCASC(fc_host_serial_number(shost),
589 min(FC_SERIAL_NUMBER_SIZE, 17));
592 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
593 dev_err(&adapter->ccw_device->dev,
594 "The FCP adapter only supports newer "
595 "control block versions\n");
596 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
599 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
600 dev_err(&adapter->ccw_device->dev,
601 "The FCP adapter only supports older "
602 "control block versions\n");
603 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
607 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
609 struct zfcp_adapter *adapter = req->adapter;
610 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
611 struct Scsi_Host *shost = adapter->scsi_host;
614 memcpy(req->data, bottom, sizeof(*bottom));
616 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
617 fc_host_permanent_port_name(shost) = bottom->wwpn;
619 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
620 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
621 fc_host_supported_speeds(shost) = bottom->supported_speed;
624 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
626 struct fsf_qtcb *qtcb = req->qtcb;
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
631 switch (qtcb->header.fsf_status) {
633 zfcp_fsf_exchange_port_evaluate(req);
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
637 zfcp_fsf_link_down_info_eval(req, 43,
638 &qtcb->header.fsf_status_qual.link_down_info);
643 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
644 __releases(&adapter->req_q_lock)
645 __acquires(&adapter->req_q_lock)
647 struct zfcp_qdio_queue *req_q = &adapter->req_q;
650 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
652 if (atomic_read(&req_q->count) > 0)
655 atomic_dec(&req_q->count);
656 spin_unlock_bh(&adapter->req_q_lock);
657 ret = wait_event_interruptible_timeout(adapter->request_wq,
658 atomic_read(&req_q->count) >= 0,
660 spin_lock_bh(&adapter->req_q_lock);
661 atomic_inc(&req_q->count);
666 atomic_inc(&adapter->qdio_outb_full);
670 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
672 struct zfcp_fsf_req *req;
673 req = mempool_alloc(pool, GFP_ATOMIC);
676 memset(req, 0, sizeof(*req));
681 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
683 struct zfcp_fsf_req_qtcb *qtcb;
686 qtcb = mempool_alloc(pool, GFP_ATOMIC);
688 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
693 memset(qtcb, 0, sizeof(*qtcb));
694 qtcb->fsf_req.qtcb = &qtcb->qtcb;
695 qtcb->fsf_req.pool = pool;
697 return &qtcb->fsf_req;
700 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
701 u32 fsf_cmd, int req_flags,
704 struct qdio_buffer_element *sbale;
706 struct zfcp_fsf_req *req;
707 struct zfcp_qdio_queue *req_q = &adapter->req_q;
709 if (req_flags & ZFCP_REQ_NO_QTCB)
710 req = zfcp_fsf_alloc_noqtcb(pool);
712 req = zfcp_fsf_alloc_qtcb(pool);
715 return ERR_PTR(-EIO);
717 if (adapter->req_no == 0)
720 INIT_LIST_HEAD(&req->list);
721 init_timer(&req->timer);
722 init_waitqueue_head(&req->completion_wq);
724 req->adapter = adapter;
725 req->fsf_command = fsf_cmd;
726 req->req_id = adapter->req_no;
727 req->sbal_number = 1;
728 req->sbal_first = req_q->first;
729 req->sbal_last = req_q->first;
732 sbale = zfcp_qdio_sbale_req(req);
733 sbale[0].addr = (void *) req->req_id;
734 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
736 if (likely(req->qtcb)) {
737 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
738 req->qtcb->prefix.req_id = req->req_id;
739 req->qtcb->prefix.ulp_info = 26;
740 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
741 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
742 req->qtcb->header.req_handle = req->req_id;
743 req->qtcb->header.fsf_command = req->fsf_command;
744 req->seq_no = adapter->fsf_req_seq_no;
745 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
746 sbale[1].addr = (void *) req->qtcb;
747 sbale[1].length = sizeof(struct fsf_qtcb);
750 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
751 zfcp_fsf_req_free(req);
752 return ERR_PTR(-EIO);
755 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
756 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
761 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
763 struct zfcp_adapter *adapter = req->adapter;
767 /* put allocated FSF request into hash table */
768 spin_lock_irqsave(&adapter->req_list_lock, flags);
769 idx = zfcp_reqlist_hash(req->req_id);
770 list_add_tail(&req->list, &adapter->req_list[idx]);
771 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
773 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
774 req->issued = get_clock();
775 if (zfcp_qdio_send(req)) {
776 del_timer(&req->timer);
777 spin_lock_irqsave(&adapter->req_list_lock, flags);
778 /* lookup request again, list might have changed */
779 if (zfcp_reqlist_find_safe(adapter, req))
780 zfcp_reqlist_remove(adapter, req);
781 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
782 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
786 /* Don't increase for unsolicited status */
788 adapter->fsf_req_seq_no++;
795 * zfcp_fsf_status_read - send status read request
796 * @adapter: pointer to struct zfcp_adapter
797 * @req_flags: request flags
798 * Returns: 0 on success, ERROR otherwise
800 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
802 struct zfcp_fsf_req *req;
803 struct fsf_status_read_buffer *sr_buf;
804 struct qdio_buffer_element *sbale;
807 spin_lock_bh(&adapter->req_q_lock);
808 if (zfcp_fsf_req_sbal_get(adapter))
811 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
813 adapter->pool.fsf_req_status_read);
815 retval = PTR_ERR(req);
819 sbale = zfcp_qdio_sbale_req(req);
820 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
821 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
824 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
829 memset(sr_buf, 0, sizeof(*sr_buf));
831 sbale = zfcp_qdio_sbale_curr(req);
832 sbale->addr = (void *) sr_buf;
833 sbale->length = sizeof(*sr_buf);
835 retval = zfcp_fsf_req_send(req);
837 goto failed_req_send;
842 mempool_free(sr_buf, adapter->pool.data_status_read);
844 zfcp_fsf_req_free(req);
845 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
847 spin_unlock_bh(&adapter->req_q_lock);
851 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
853 struct zfcp_unit *unit = req->data;
854 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
856 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
859 switch (req->qtcb->header.fsf_status) {
860 case FSF_PORT_HANDLE_NOT_VALID:
861 if (fsq->word[0] == fsq->word[1]) {
862 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
864 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
867 case FSF_LUN_HANDLE_NOT_VALID:
868 if (fsq->word[0] == fsq->word[1]) {
869 zfcp_erp_port_reopen(unit->port, 0, 105, req);
870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
873 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
874 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
877 zfcp_erp_port_boxed(unit->port, 47, req);
878 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
879 ZFCP_STATUS_FSFREQ_RETRY;
882 zfcp_erp_unit_boxed(unit, 48, req);
883 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
884 ZFCP_STATUS_FSFREQ_RETRY;
886 case FSF_ADAPTER_STATUS_AVAILABLE:
887 switch (fsq->word[0]) {
888 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
889 zfcp_test_link(unit->port);
890 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
891 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
896 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
902 * zfcp_fsf_abort_fcp_command - abort running SCSI command
903 * @old_req_id: unsigned long
904 * @unit: pointer to struct zfcp_unit
905 * Returns: pointer to struct zfcp_fsf_req
908 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
909 struct zfcp_unit *unit)
911 struct qdio_buffer_element *sbale;
912 struct zfcp_fsf_req *req = NULL;
913 struct zfcp_adapter *adapter = unit->port->adapter;
915 spin_lock_bh(&adapter->req_q_lock);
916 if (zfcp_fsf_req_sbal_get(adapter))
918 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
919 0, adapter->pool.fsf_req_abort);
925 if (unlikely(!(atomic_read(&unit->status) &
926 ZFCP_STATUS_COMMON_UNBLOCKED)))
929 sbale = zfcp_qdio_sbale_req(req);
930 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
931 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
934 req->handler = zfcp_fsf_abort_fcp_command_handler;
935 req->qtcb->header.lun_handle = unit->handle;
936 req->qtcb->header.port_handle = unit->port->handle;
937 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
939 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
940 if (!zfcp_fsf_req_send(req))
944 zfcp_fsf_req_free(req);
947 spin_unlock_bh(&adapter->req_q_lock);
951 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
953 struct zfcp_adapter *adapter = req->adapter;
954 struct zfcp_send_ct *send_ct = req->data;
955 struct fsf_qtcb_header *header = &req->qtcb->header;
957 send_ct->status = -EINVAL;
959 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
962 switch (header->fsf_status) {
964 zfcp_san_dbf_event_ct_response(req);
967 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
968 zfcp_fsf_class_not_supp(req);
970 case FSF_ADAPTER_STATUS_AVAILABLE:
971 switch (header->fsf_status_qual.word[0]){
972 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
973 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
974 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
978 case FSF_ACCESS_DENIED:
981 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
982 ZFCP_STATUS_FSFREQ_RETRY;
984 case FSF_PORT_HANDLE_NOT_VALID:
985 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
986 case FSF_GENERIC_COMMAND_REJECTED:
987 case FSF_PAYLOAD_SIZE_MISMATCH:
988 case FSF_REQUEST_SIZE_TOO_LARGE:
989 case FSF_RESPONSE_SIZE_TOO_LARGE:
990 case FSF_SBAL_MISMATCH:
991 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
996 if (send_ct->handler)
997 send_ct->handler(send_ct->handler_data);
1000 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1001 struct scatterlist *sg_req,
1002 struct scatterlist *sg_resp,
1005 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1006 u32 feat = req->adapter->adapter_features;
1009 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1010 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1011 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1014 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1015 sbale[2].addr = sg_virt(sg_req);
1016 sbale[2].length = sg_req->length;
1017 sbale[3].addr = sg_virt(sg_resp);
1018 sbale[3].length = sg_resp->length;
1019 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1023 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1027 req->qtcb->bottom.support.req_buf_length = bytes;
1028 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1030 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1031 sg_resp, max_sbals);
1034 req->qtcb->bottom.support.resp_buf_length = bytes;
1040 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1041 * @ct: pointer to struct zfcp_send_ct with data for request
1042 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1043 * @erp_action: if non-null the Generic Service request sent within ERP
1045 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1046 struct zfcp_erp_action *erp_action)
1048 struct zfcp_wka_port *wka_port = ct->wka_port;
1049 struct zfcp_adapter *adapter = wka_port->adapter;
1050 struct zfcp_fsf_req *req;
1053 spin_lock_bh(&adapter->req_q_lock);
1054 if (zfcp_fsf_req_sbal_get(adapter))
1057 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1058 ZFCP_REQ_AUTO_CLEANUP, pool);
1064 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1065 FSF_MAX_SBALS_PER_REQ);
1069 req->handler = zfcp_fsf_send_ct_handler;
1070 req->qtcb->header.port_handle = wka_port->handle;
1071 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1072 req->qtcb->bottom.support.timeout = ct->timeout;
1075 zfcp_san_dbf_event_ct_request(req);
1078 erp_action->fsf_req = req;
1079 req->erp_action = erp_action;
1080 zfcp_fsf_start_erp_timer(req);
1082 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1084 ret = zfcp_fsf_req_send(req);
1091 zfcp_fsf_req_free(req);
1093 erp_action->fsf_req = NULL;
1095 spin_unlock_bh(&adapter->req_q_lock);
1099 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1101 struct zfcp_send_els *send_els = req->data;
1102 struct zfcp_port *port = send_els->port;
1103 struct fsf_qtcb_header *header = &req->qtcb->header;
1105 send_els->status = -EINVAL;
1107 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1108 goto skip_fsfstatus;
1110 switch (header->fsf_status) {
1112 zfcp_san_dbf_event_els_response(req);
1113 send_els->status = 0;
1115 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1116 zfcp_fsf_class_not_supp(req);
1118 case FSF_ADAPTER_STATUS_AVAILABLE:
1119 switch (header->fsf_status_qual.word[0]){
1120 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1121 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1122 zfcp_test_link(port);
1124 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1125 case FSF_SQ_RETRY_IF_POSSIBLE:
1126 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1130 case FSF_ELS_COMMAND_REJECTED:
1131 case FSF_PAYLOAD_SIZE_MISMATCH:
1132 case FSF_REQUEST_SIZE_TOO_LARGE:
1133 case FSF_RESPONSE_SIZE_TOO_LARGE:
1135 case FSF_ACCESS_DENIED:
1136 zfcp_fsf_access_denied_port(req, port);
1138 case FSF_SBAL_MISMATCH:
1139 /* should never occure, avoided in zfcp_fsf_send_els */
1142 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1146 if (send_els->handler)
1147 send_els->handler(send_els->handler_data);
1151 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1152 * @els: pointer to struct zfcp_send_els with data for the command
1154 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1156 struct zfcp_fsf_req *req;
1157 struct zfcp_adapter *adapter = els->adapter;
1158 struct fsf_qtcb_bottom_support *bottom;
1161 if (unlikely(!(atomic_read(&els->port->status) &
1162 ZFCP_STATUS_COMMON_UNBLOCKED)))
1165 spin_lock_bh(&adapter->req_q_lock);
1166 if (zfcp_fsf_req_sbal_get(adapter))
1168 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1169 ZFCP_REQ_AUTO_CLEANUP, NULL);
1175 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1180 bottom = &req->qtcb->bottom.support;
1181 req->handler = zfcp_fsf_send_els_handler;
1182 bottom->d_id = els->d_id;
1183 bottom->service_class = FSF_CLASS_3;
1184 bottom->timeout = 2 * R_A_TOV;
1187 zfcp_san_dbf_event_els_request(req);
1189 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1190 ret = zfcp_fsf_req_send(req);
1197 zfcp_fsf_req_free(req);
1199 spin_unlock_bh(&adapter->req_q_lock);
1203 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1205 struct qdio_buffer_element *sbale;
1206 struct zfcp_fsf_req *req;
1207 struct zfcp_adapter *adapter = erp_action->adapter;
1210 spin_lock_bh(&adapter->req_q_lock);
1211 if (zfcp_fsf_req_sbal_get(adapter))
1213 req = zfcp_fsf_req_create(adapter,
1214 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1215 ZFCP_REQ_AUTO_CLEANUP,
1216 adapter->pool.fsf_req_erp);
1218 retval = PTR_ERR(req);
1222 sbale = zfcp_qdio_sbale_req(req);
1223 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1224 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1226 req->qtcb->bottom.config.feature_selection =
1228 FSF_FEATURE_LUN_SHARING |
1229 FSF_FEATURE_NOTIFICATION_LOST |
1230 FSF_FEATURE_UPDATE_ALERT;
1231 req->erp_action = erp_action;
1232 req->handler = zfcp_fsf_exchange_config_data_handler;
1233 erp_action->fsf_req = req;
1235 zfcp_fsf_start_erp_timer(req);
1236 retval = zfcp_fsf_req_send(req);
1238 zfcp_fsf_req_free(req);
1239 erp_action->fsf_req = NULL;
1242 spin_unlock_bh(&adapter->req_q_lock);
1246 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1247 struct fsf_qtcb_bottom_config *data)
1249 struct qdio_buffer_element *sbale;
1250 struct zfcp_fsf_req *req = NULL;
1253 spin_lock_bh(&adapter->req_q_lock);
1254 if (zfcp_fsf_req_sbal_get(adapter))
1257 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1260 retval = PTR_ERR(req);
1264 sbale = zfcp_qdio_sbale_req(req);
1265 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1266 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1267 req->handler = zfcp_fsf_exchange_config_data_handler;
1269 req->qtcb->bottom.config.feature_selection =
1271 FSF_FEATURE_LUN_SHARING |
1272 FSF_FEATURE_NOTIFICATION_LOST |
1273 FSF_FEATURE_UPDATE_ALERT;
1278 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1279 retval = zfcp_fsf_req_send(req);
1281 spin_unlock_bh(&adapter->req_q_lock);
1283 wait_event(req->completion_wq,
1284 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1286 zfcp_fsf_req_free(req);
1292 * zfcp_fsf_exchange_port_data - request information about local port
1293 * @erp_action: ERP action for the adapter for which port data is requested
1294 * Returns: 0 on success, error otherwise
1296 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1298 struct qdio_buffer_element *sbale;
1299 struct zfcp_fsf_req *req;
1300 struct zfcp_adapter *adapter = erp_action->adapter;
1303 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1306 spin_lock_bh(&adapter->req_q_lock);
1307 if (zfcp_fsf_req_sbal_get(adapter))
1309 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1310 ZFCP_REQ_AUTO_CLEANUP,
1311 adapter->pool.fsf_req_erp);
1313 retval = PTR_ERR(req);
1317 sbale = zfcp_qdio_sbale_req(req);
1318 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1319 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1321 req->handler = zfcp_fsf_exchange_port_data_handler;
1322 req->erp_action = erp_action;
1323 erp_action->fsf_req = req;
1325 zfcp_fsf_start_erp_timer(req);
1326 retval = zfcp_fsf_req_send(req);
1328 zfcp_fsf_req_free(req);
1329 erp_action->fsf_req = NULL;
1332 spin_unlock_bh(&adapter->req_q_lock);
1337 * zfcp_fsf_exchange_port_data_sync - request information about local port
1338 * @adapter: pointer to struct zfcp_adapter
1339 * @data: pointer to struct fsf_qtcb_bottom_port
1340 * Returns: 0 on success, error otherwise
1342 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1343 struct fsf_qtcb_bottom_port *data)
1345 struct qdio_buffer_element *sbale;
1346 struct zfcp_fsf_req *req = NULL;
1349 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1352 spin_lock_bh(&adapter->req_q_lock);
1353 if (zfcp_fsf_req_sbal_get(adapter))
1356 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1359 retval = PTR_ERR(req);
1366 sbale = zfcp_qdio_sbale_req(req);
1367 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1368 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1370 req->handler = zfcp_fsf_exchange_port_data_handler;
1371 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1372 retval = zfcp_fsf_req_send(req);
1374 spin_unlock_bh(&adapter->req_q_lock);
1376 wait_event(req->completion_wq,
1377 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1378 zfcp_fsf_req_free(req);
1383 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1385 struct zfcp_port *port = req->data;
1386 struct fsf_qtcb_header *header = &req->qtcb->header;
1387 struct fsf_plogi *plogi;
1389 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1392 switch (header->fsf_status) {
1393 case FSF_PORT_ALREADY_OPEN:
1395 case FSF_ACCESS_DENIED:
1396 zfcp_fsf_access_denied_port(req, port);
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_port_failed(port, 31, req);
1404 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1406 case FSF_ADAPTER_STATUS_AVAILABLE:
1407 switch (header->fsf_status_qual.word[0]) {
1408 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1409 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1410 case FSF_SQ_NO_RETRY_POSSIBLE:
1411 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1416 port->handle = header->port_handle;
1417 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1418 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1419 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1420 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1422 /* check whether D_ID has changed during open */
1424 * FIXME: This check is not airtight, as the FCP channel does
1425 * not monitor closures of target port connections caused on
1426 * the remote side. Thus, they might miss out on invalidating
1427 * locally cached WWPNs (and other N_Port parameters) of gone
1428 * target ports. So, our heroic attempt to make things safe
1429 * could be undermined by 'open port' response data tagged with
1430 * obsolete WWPNs. Another reason to monitor potential
1431 * connection closures ourself at least (by interpreting
1432 * incoming ELS' and unsolicited status). It just crosses my
1433 * mind that one should be able to cross-check by means of
1434 * another GID_PN straight after a port has been opened.
1435 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1437 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1438 if (req->qtcb->bottom.support.els1_length >=
1439 FSF_PLOGI_MIN_LEN) {
1440 if (plogi->serv_param.wwpn != port->wwpn)
1443 port->wwnn = plogi->serv_param.wwnn;
1444 zfcp_fc_plogi_evaluate(port, plogi);
1448 case FSF_UNKNOWN_OP_SUBTYPE:
1449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1455 * zfcp_fsf_open_port - create and send open port request
1456 * @erp_action: pointer to struct zfcp_erp_action
1457 * Returns: 0 on success, error otherwise
1459 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1461 struct qdio_buffer_element *sbale;
1462 struct zfcp_adapter *adapter = erp_action->adapter;
1463 struct zfcp_fsf_req *req;
1466 spin_lock_bh(&adapter->req_q_lock);
1467 if (zfcp_fsf_req_sbal_get(adapter))
1470 req = zfcp_fsf_req_create(adapter,
1471 FSF_QTCB_OPEN_PORT_WITH_DID,
1472 ZFCP_REQ_AUTO_CLEANUP,
1473 adapter->pool.fsf_req_erp);
1475 retval = PTR_ERR(req);
1479 sbale = zfcp_qdio_sbale_req(req);
1480 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1481 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1483 req->handler = zfcp_fsf_open_port_handler;
1484 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1485 req->data = erp_action->port;
1486 req->erp_action = erp_action;
1487 erp_action->fsf_req = req;
1489 zfcp_fsf_start_erp_timer(req);
1490 retval = zfcp_fsf_req_send(req);
1492 zfcp_fsf_req_free(req);
1493 erp_action->fsf_req = NULL;
1496 spin_unlock_bh(&adapter->req_q_lock);
1500 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1502 struct zfcp_port *port = req->data;
1504 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1507 switch (req->qtcb->header.fsf_status) {
1508 case FSF_PORT_HANDLE_NOT_VALID:
1509 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1510 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1512 case FSF_ADAPTER_STATUS_AVAILABLE:
1515 zfcp_erp_modify_port_status(port, 33, req,
1516 ZFCP_STATUS_COMMON_OPEN,
1523 * zfcp_fsf_close_port - create and send close port request
1524 * @erp_action: pointer to struct zfcp_erp_action
1525 * Returns: 0 on success, error otherwise
1527 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1529 struct qdio_buffer_element *sbale;
1530 struct zfcp_adapter *adapter = erp_action->adapter;
1531 struct zfcp_fsf_req *req;
1534 spin_lock_bh(&adapter->req_q_lock);
1535 if (zfcp_fsf_req_sbal_get(adapter))
1538 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1539 ZFCP_REQ_AUTO_CLEANUP,
1540 adapter->pool.fsf_req_erp);
1542 retval = PTR_ERR(req);
1546 sbale = zfcp_qdio_sbale_req(req);
1547 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1548 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1550 req->handler = zfcp_fsf_close_port_handler;
1551 req->data = erp_action->port;
1552 req->erp_action = erp_action;
1553 req->qtcb->header.port_handle = erp_action->port->handle;
1554 erp_action->fsf_req = req;
1556 zfcp_fsf_start_erp_timer(req);
1557 retval = zfcp_fsf_req_send(req);
1559 zfcp_fsf_req_free(req);
1560 erp_action->fsf_req = NULL;
1563 spin_unlock_bh(&adapter->req_q_lock);
1567 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1569 struct zfcp_wka_port *wka_port = req->data;
1570 struct fsf_qtcb_header *header = &req->qtcb->header;
1572 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1573 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1577 switch (header->fsf_status) {
1578 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1579 dev_warn(&req->adapter->ccw_device->dev,
1580 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1581 case FSF_ADAPTER_STATUS_AVAILABLE:
1582 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1583 case FSF_ACCESS_DENIED:
1584 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1586 case FSF_PORT_ALREADY_OPEN:
1589 wka_port->handle = header->port_handle;
1590 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1593 wake_up(&wka_port->completion_wq);
1597 * zfcp_fsf_open_wka_port - create and send open wka-port request
1598 * @wka_port: pointer to struct zfcp_wka_port
1599 * Returns: 0 on success, error otherwise
1601 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1603 struct qdio_buffer_element *sbale;
1604 struct zfcp_adapter *adapter = wka_port->adapter;
1605 struct zfcp_fsf_req *req;
1608 spin_lock_bh(&adapter->req_q_lock);
1609 if (zfcp_fsf_req_sbal_get(adapter))
1612 req = zfcp_fsf_req_create(adapter,
1613 FSF_QTCB_OPEN_PORT_WITH_DID,
1614 ZFCP_REQ_AUTO_CLEANUP,
1615 adapter->pool.fsf_req_erp);
1616 if (unlikely(IS_ERR(req))) {
1617 retval = PTR_ERR(req);
1621 sbale = zfcp_qdio_sbale_req(req);
1622 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1623 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1625 req->handler = zfcp_fsf_open_wka_port_handler;
1626 req->qtcb->bottom.support.d_id = wka_port->d_id;
1627 req->data = wka_port;
1629 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1630 retval = zfcp_fsf_req_send(req);
1632 zfcp_fsf_req_free(req);
1634 spin_unlock_bh(&adapter->req_q_lock);
1638 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1640 struct zfcp_wka_port *wka_port = req->data;
1642 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1643 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1644 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1647 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1648 wake_up(&wka_port->completion_wq);
1652 * zfcp_fsf_close_wka_port - create and send close wka port request
1653 * @erp_action: pointer to struct zfcp_erp_action
1654 * Returns: 0 on success, error otherwise
1656 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1658 struct qdio_buffer_element *sbale;
1659 struct zfcp_adapter *adapter = wka_port->adapter;
1660 struct zfcp_fsf_req *req;
1663 spin_lock_bh(&adapter->req_q_lock);
1664 if (zfcp_fsf_req_sbal_get(adapter))
1667 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1668 ZFCP_REQ_AUTO_CLEANUP,
1669 adapter->pool.fsf_req_erp);
1670 if (unlikely(IS_ERR(req))) {
1671 retval = PTR_ERR(req);
1675 sbale = zfcp_qdio_sbale_req(req);
1676 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1677 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1679 req->handler = zfcp_fsf_close_wka_port_handler;
1680 req->data = wka_port;
1681 req->qtcb->header.port_handle = wka_port->handle;
1683 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1684 retval = zfcp_fsf_req_send(req);
1686 zfcp_fsf_req_free(req);
1688 spin_unlock_bh(&adapter->req_q_lock);
1692 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1694 struct zfcp_port *port = req->data;
1695 struct fsf_qtcb_header *header = &req->qtcb->header;
1696 struct zfcp_unit *unit;
1698 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1701 switch (header->fsf_status) {
1702 case FSF_PORT_HANDLE_NOT_VALID:
1703 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1704 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1706 case FSF_ACCESS_DENIED:
1707 zfcp_fsf_access_denied_port(req, port);
1709 case FSF_PORT_BOXED:
1710 zfcp_erp_port_boxed(port, 50, req);
1711 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1712 ZFCP_STATUS_FSFREQ_RETRY;
1713 /* can't use generic zfcp_erp_modify_port_status because
1714 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1715 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1716 list_for_each_entry(unit, &port->unit_list_head, list)
1717 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1720 case FSF_ADAPTER_STATUS_AVAILABLE:
1721 switch (header->fsf_status_qual.word[0]) {
1722 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1724 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1725 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1730 /* can't use generic zfcp_erp_modify_port_status because
1731 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1733 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1734 list_for_each_entry(unit, &port->unit_list_head, list)
1735 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1742 * zfcp_fsf_close_physical_port - close physical port
1743 * @erp_action: pointer to struct zfcp_erp_action
1744 * Returns: 0 on success
1746 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1748 struct qdio_buffer_element *sbale;
1749 struct zfcp_adapter *adapter = erp_action->adapter;
1750 struct zfcp_fsf_req *req;
1753 spin_lock_bh(&adapter->req_q_lock);
1754 if (zfcp_fsf_req_sbal_get(adapter))
1757 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1758 ZFCP_REQ_AUTO_CLEANUP,
1759 adapter->pool.fsf_req_erp);
1761 retval = PTR_ERR(req);
1765 sbale = zfcp_qdio_sbale_req(req);
1766 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1767 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1769 req->data = erp_action->port;
1770 req->qtcb->header.port_handle = erp_action->port->handle;
1771 req->erp_action = erp_action;
1772 req->handler = zfcp_fsf_close_physical_port_handler;
1773 erp_action->fsf_req = req;
1775 zfcp_fsf_start_erp_timer(req);
1776 retval = zfcp_fsf_req_send(req);
1778 zfcp_fsf_req_free(req);
1779 erp_action->fsf_req = NULL;
1782 spin_unlock_bh(&adapter->req_q_lock);
1786 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1788 struct zfcp_adapter *adapter = req->adapter;
1789 struct zfcp_unit *unit = req->data;
1790 struct fsf_qtcb_header *header = &req->qtcb->header;
1791 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1792 struct fsf_queue_designator *queue_designator =
1793 &header->fsf_status_qual.fsf_queue_designator;
1794 int exclusive, readwrite;
1796 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1799 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1800 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1801 ZFCP_STATUS_UNIT_SHARED |
1802 ZFCP_STATUS_UNIT_READONLY,
1805 switch (header->fsf_status) {
1807 case FSF_PORT_HANDLE_NOT_VALID:
1808 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1810 case FSF_LUN_ALREADY_OPEN:
1812 case FSF_ACCESS_DENIED:
1813 zfcp_fsf_access_denied_unit(req, unit);
1814 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1815 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1817 case FSF_PORT_BOXED:
1818 zfcp_erp_port_boxed(unit->port, 51, req);
1819 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1820 ZFCP_STATUS_FSFREQ_RETRY;
1822 case FSF_LUN_SHARING_VIOLATION:
1823 if (header->fsf_status_qual.word[0])
1824 dev_warn(&adapter->ccw_device->dev,
1825 "LUN 0x%Lx on port 0x%Lx is already in "
1826 "use by CSS%d, MIF Image ID %x\n",
1827 (unsigned long long)unit->fcp_lun,
1828 (unsigned long long)unit->port->wwpn,
1829 queue_designator->cssid,
1830 queue_designator->hla);
1832 zfcp_act_eval_err(adapter,
1833 header->fsf_status_qual.word[2]);
1834 zfcp_erp_unit_access_denied(unit, 60, req);
1835 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1836 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1837 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1839 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1840 dev_warn(&adapter->ccw_device->dev,
1841 "No handle is available for LUN "
1842 "0x%016Lx on port 0x%016Lx\n",
1843 (unsigned long long)unit->fcp_lun,
1844 (unsigned long long)unit->port->wwpn);
1845 zfcp_erp_unit_failed(unit, 34, req);
1847 case FSF_INVALID_COMMAND_OPTION:
1848 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1850 case FSF_ADAPTER_STATUS_AVAILABLE:
1851 switch (header->fsf_status_qual.word[0]) {
1852 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1853 zfcp_test_link(unit->port);
1855 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1856 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1862 unit->handle = header->lun_handle;
1863 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1865 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1866 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1867 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1868 exclusive = (bottom->lun_access_info &
1869 FSF_UNIT_ACCESS_EXCLUSIVE);
1870 readwrite = (bottom->lun_access_info &
1871 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1874 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1878 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1880 dev_info(&adapter->ccw_device->dev,
1881 "SCSI device at LUN 0x%016Lx on port "
1882 "0x%016Lx opened read-only\n",
1883 (unsigned long long)unit->fcp_lun,
1884 (unsigned long long)unit->port->wwpn);
1887 if (exclusive && !readwrite) {
1888 dev_err(&adapter->ccw_device->dev,
1889 "Exclusive read-only access not "
1890 "supported (unit 0x%016Lx, "
1892 (unsigned long long)unit->fcp_lun,
1893 (unsigned long long)unit->port->wwpn);
1894 zfcp_erp_unit_failed(unit, 35, req);
1895 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1896 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1897 } else if (!exclusive && readwrite) {
1898 dev_err(&adapter->ccw_device->dev,
1899 "Shared read-write access not "
1900 "supported (unit 0x%016Lx, port "
1902 (unsigned long long)unit->fcp_lun,
1903 (unsigned long long)unit->port->wwpn);
1904 zfcp_erp_unit_failed(unit, 36, req);
1905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1906 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1914 * zfcp_fsf_open_unit - open unit
1915 * @erp_action: pointer to struct zfcp_erp_action
1916 * Returns: 0 on success, error otherwise
1918 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1920 struct qdio_buffer_element *sbale;
1921 struct zfcp_adapter *adapter = erp_action->adapter;
1922 struct zfcp_fsf_req *req;
1925 spin_lock_bh(&adapter->req_q_lock);
1926 if (zfcp_fsf_req_sbal_get(adapter))
1929 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1930 ZFCP_REQ_AUTO_CLEANUP,
1931 adapter->pool.fsf_req_erp);
1933 retval = PTR_ERR(req);
1937 sbale = zfcp_qdio_sbale_req(req);
1938 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1939 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1941 req->qtcb->header.port_handle = erp_action->port->handle;
1942 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1943 req->handler = zfcp_fsf_open_unit_handler;
1944 req->data = erp_action->unit;
1945 req->erp_action = erp_action;
1946 erp_action->fsf_req = req;
1948 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1949 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1951 zfcp_fsf_start_erp_timer(req);
1952 retval = zfcp_fsf_req_send(req);
1954 zfcp_fsf_req_free(req);
1955 erp_action->fsf_req = NULL;
1958 spin_unlock_bh(&adapter->req_q_lock);
1962 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1964 struct zfcp_unit *unit = req->data;
1966 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1969 switch (req->qtcb->header.fsf_status) {
1970 case FSF_PORT_HANDLE_NOT_VALID:
1971 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1972 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1974 case FSF_LUN_HANDLE_NOT_VALID:
1975 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1976 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1978 case FSF_PORT_BOXED:
1979 zfcp_erp_port_boxed(unit->port, 52, req);
1980 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1981 ZFCP_STATUS_FSFREQ_RETRY;
1983 case FSF_ADAPTER_STATUS_AVAILABLE:
1984 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1985 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1986 zfcp_test_link(unit->port);
1988 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1989 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1994 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2000 * zfcp_fsf_close_unit - close zfcp unit
2001 * @erp_action: pointer to struct zfcp_unit
2002 * Returns: 0 on success, error otherwise
2004 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2006 struct qdio_buffer_element *sbale;
2007 struct zfcp_adapter *adapter = erp_action->adapter;
2008 struct zfcp_fsf_req *req;
2011 spin_lock_bh(&adapter->req_q_lock);
2012 if (zfcp_fsf_req_sbal_get(adapter))
2014 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2015 ZFCP_REQ_AUTO_CLEANUP,
2016 adapter->pool.fsf_req_erp);
2018 retval = PTR_ERR(req);
2022 sbale = zfcp_qdio_sbale_req(req);
2023 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2024 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2026 req->qtcb->header.port_handle = erp_action->port->handle;
2027 req->qtcb->header.lun_handle = erp_action->unit->handle;
2028 req->handler = zfcp_fsf_close_unit_handler;
2029 req->data = erp_action->unit;
2030 req->erp_action = erp_action;
2031 erp_action->fsf_req = req;
2033 zfcp_fsf_start_erp_timer(req);
2034 retval = zfcp_fsf_req_send(req);
2036 zfcp_fsf_req_free(req);
2037 erp_action->fsf_req = NULL;
2040 spin_unlock_bh(&adapter->req_q_lock);
2044 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2046 lat_rec->sum += lat;
2047 lat_rec->min = min(lat_rec->min, lat);
2048 lat_rec->max = max(lat_rec->max, lat);
2051 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2053 struct fsf_qual_latency_info *lat_inf;
2054 struct latency_cont *lat;
2055 struct zfcp_unit *unit = req->unit;
2057 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2059 switch (req->qtcb->bottom.io.data_direction) {
2060 case FSF_DATADIR_READ:
2061 lat = &unit->latencies.read;
2063 case FSF_DATADIR_WRITE:
2064 lat = &unit->latencies.write;
2066 case FSF_DATADIR_CMND:
2067 lat = &unit->latencies.cmd;
2073 spin_lock(&unit->latencies.lock);
2074 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2075 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2077 spin_unlock(&unit->latencies.lock);
2080 #ifdef CONFIG_BLK_DEV_IO_TRACE
2081 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2083 struct fsf_qual_latency_info *lat_inf;
2084 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2085 struct request *req = scsi_cmnd->request;
2086 struct zfcp_blk_drv_data trace;
2087 int ticks = fsf_req->adapter->timer_ticks;
2090 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2091 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2092 trace.flags |= ZFCP_BLK_LAT_VALID;
2093 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2094 trace.channel_lat = lat_inf->channel_lat * ticks;
2095 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2097 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2098 trace.flags |= ZFCP_BLK_REQ_ERROR;
2099 trace.inb_usage = fsf_req->qdio_inb_usage;
2100 trace.outb_usage = fsf_req->qdio_outb_usage;
2102 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2105 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2110 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2112 struct scsi_cmnd *scpnt;
2113 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2114 &(req->qtcb->bottom.io.fcp_rsp);
2116 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2117 unsigned long flags;
2119 read_lock_irqsave(&req->adapter->abort_lock, flags);
2122 if (unlikely(!scpnt)) {
2123 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2127 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2128 set_host_byte(scpnt, DID_SOFT_ERROR);
2129 goto skip_fsfstatus;
2132 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2133 set_host_byte(scpnt, DID_ERROR);
2134 goto skip_fsfstatus;
2137 set_msg_byte(scpnt, COMMAND_COMPLETE);
2139 scpnt->result |= fcp_rsp_iu->scsi_status;
2141 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2142 zfcp_fsf_req_latency(req);
2144 zfcp_fsf_trace_latency(req);
2146 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2147 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2148 set_host_byte(scpnt, DID_OK);
2150 set_host_byte(scpnt, DID_ERROR);
2151 goto skip_fsfstatus;
2155 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2156 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2157 fcp_rsp_iu->fcp_rsp_len;
2158 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2159 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2161 memcpy(scpnt->sense_buffer,
2162 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2165 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2166 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2167 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2169 set_host_byte(scpnt, DID_ERROR);
2172 if (scpnt->result != 0)
2173 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2174 else if (scpnt->retries > 0)
2175 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2177 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2179 scpnt->host_scribble = NULL;
2180 (scpnt->scsi_done) (scpnt);
2182 * We must hold this lock until scsi_done has been called.
2183 * Otherwise we may call scsi_done after abort regarding this
2184 * command has completed.
2185 * Note: scsi_done must not block!
2187 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2190 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2192 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2193 &(req->qtcb->bottom.io.fcp_rsp);
2194 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2196 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2197 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2198 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2202 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2204 struct zfcp_unit *unit;
2205 struct fsf_qtcb_header *header = &req->qtcb->header;
2207 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2212 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2213 goto skip_fsfstatus;
2215 switch (header->fsf_status) {
2216 case FSF_HANDLE_MISMATCH:
2217 case FSF_PORT_HANDLE_NOT_VALID:
2218 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2219 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2221 case FSF_FCPLUN_NOT_VALID:
2222 case FSF_LUN_HANDLE_NOT_VALID:
2223 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2224 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2226 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2227 zfcp_fsf_class_not_supp(req);
2229 case FSF_ACCESS_DENIED:
2230 zfcp_fsf_access_denied_unit(req, unit);
2232 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2233 dev_err(&req->adapter->ccw_device->dev,
2234 "Incorrect direction %d, unit 0x%016Lx on port "
2235 "0x%016Lx closed\n",
2236 req->qtcb->bottom.io.data_direction,
2237 (unsigned long long)unit->fcp_lun,
2238 (unsigned long long)unit->port->wwpn);
2239 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2240 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2242 case FSF_CMND_LENGTH_NOT_VALID:
2243 dev_err(&req->adapter->ccw_device->dev,
2244 "Incorrect CDB length %d, unit 0x%016Lx on "
2245 "port 0x%016Lx closed\n",
2246 req->qtcb->bottom.io.fcp_cmnd_length,
2247 (unsigned long long)unit->fcp_lun,
2248 (unsigned long long)unit->port->wwpn);
2249 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2250 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2252 case FSF_PORT_BOXED:
2253 zfcp_erp_port_boxed(unit->port, 53, req);
2254 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2255 ZFCP_STATUS_FSFREQ_RETRY;
2258 zfcp_erp_unit_boxed(unit, 54, req);
2259 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2260 ZFCP_STATUS_FSFREQ_RETRY;
2262 case FSF_ADAPTER_STATUS_AVAILABLE:
2263 if (header->fsf_status_qual.word[0] ==
2264 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2265 zfcp_test_link(unit->port);
2266 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2270 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2271 zfcp_fsf_send_fcp_ctm_handler(req);
2273 zfcp_fsf_send_fcp_command_task_handler(req);
2275 zfcp_unit_put(unit);
2279 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2284 * fcp_dl_addr = start address of fcp_cmnd structure +
2285 * size of fixed part + size of dynamically sized add_dcp_cdb field
2286 * SEE FCP-2 documentation
2288 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2289 (fcp_cmd->add_fcp_cdb_length << 2));
2290 *fcp_dl_ptr = fcp_dl;
2294 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2295 * @unit: unit where command is sent to
2296 * @scsi_cmnd: scsi command to be sent
2298 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2299 struct scsi_cmnd *scsi_cmnd)
2301 struct zfcp_fsf_req *req;
2302 struct fcp_cmnd_iu *fcp_cmnd_iu;
2303 unsigned int sbtype;
2304 int real_bytes, retval = -EIO;
2305 struct zfcp_adapter *adapter = unit->port->adapter;
2307 if (unlikely(!(atomic_read(&unit->status) &
2308 ZFCP_STATUS_COMMON_UNBLOCKED)))
2311 spin_lock(&adapter->req_q_lock);
2312 if (atomic_read(&adapter->req_q.count) <= 0) {
2313 atomic_inc(&adapter->qdio_outb_full);
2316 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2317 ZFCP_REQ_AUTO_CLEANUP,
2318 adapter->pool.fsf_req_scsi);
2320 retval = PTR_ERR(req);
2324 zfcp_unit_get(unit);
2326 req->data = scsi_cmnd;
2327 req->handler = zfcp_fsf_send_fcp_command_handler;
2328 req->qtcb->header.lun_handle = unit->handle;
2329 req->qtcb->header.port_handle = unit->port->handle;
2330 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2332 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2334 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2335 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2337 * set depending on data direction:
2338 * data direction bits in SBALE (SB Type)
2339 * data direction bits in QTCB
2340 * data direction bits in FCP_CMND IU
2342 switch (scsi_cmnd->sc_data_direction) {
2344 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2345 sbtype = SBAL_FLAGS0_TYPE_READ;
2347 case DMA_FROM_DEVICE:
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2349 sbtype = SBAL_FLAGS0_TYPE_READ;
2350 fcp_cmnd_iu->rddata = 1;
2353 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2354 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2355 fcp_cmnd_iu->wddata = 1;
2357 case DMA_BIDIRECTIONAL:
2360 goto failed_scsi_cmnd;
2363 if (likely((scsi_cmnd->device->simple_tags) ||
2364 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2365 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2366 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2368 fcp_cmnd_iu->task_attribute = UNTAGGED;
2370 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2371 fcp_cmnd_iu->add_fcp_cdb_length =
2372 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2374 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2376 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2377 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2379 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2380 scsi_sglist(scsi_cmnd),
2381 FSF_MAX_SBALS_PER_REQ);
2382 if (unlikely(real_bytes < 0)) {
2383 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2386 dev_err(&adapter->ccw_device->dev,
2387 "Oversize data package, unit 0x%016Lx "
2388 "on port 0x%016Lx closed\n",
2389 (unsigned long long)unit->fcp_lun,
2390 (unsigned long long)unit->port->wwpn);
2391 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2394 goto failed_scsi_cmnd;
2397 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2399 retval = zfcp_fsf_req_send(req);
2400 if (unlikely(retval))
2401 goto failed_scsi_cmnd;
2406 zfcp_unit_put(unit);
2407 zfcp_fsf_req_free(req);
2408 scsi_cmnd->host_scribble = NULL;
2410 spin_unlock(&adapter->req_q_lock);
2415 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2416 * @unit: pointer to struct zfcp_unit
2417 * @tm_flags: unsigned byte for task management flags
2418 * Returns: on success pointer to struct fsf_req, NULL otherwise
2420 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2422 struct qdio_buffer_element *sbale;
2423 struct zfcp_fsf_req *req = NULL;
2424 struct fcp_cmnd_iu *fcp_cmnd_iu;
2425 struct zfcp_adapter *adapter = unit->port->adapter;
2427 if (unlikely(!(atomic_read(&unit->status) &
2428 ZFCP_STATUS_COMMON_UNBLOCKED)))
2431 spin_lock_bh(&adapter->req_q_lock);
2432 if (zfcp_fsf_req_sbal_get(adapter))
2434 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
2435 adapter->pool.fsf_req_scsi);
2441 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2443 req->handler = zfcp_fsf_send_fcp_command_handler;
2444 req->qtcb->header.lun_handle = unit->handle;
2445 req->qtcb->header.port_handle = unit->port->handle;
2446 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2447 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2448 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2451 sbale = zfcp_qdio_sbale_req(req);
2452 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2453 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2455 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2456 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2457 fcp_cmnd_iu->task_management_flags = tm_flags;
2459 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2460 if (!zfcp_fsf_req_send(req))
2463 zfcp_fsf_req_free(req);
2466 spin_unlock_bh(&adapter->req_q_lock);
2470 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2472 if (req->qtcb->header.fsf_status != FSF_GOOD)
2473 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2477 * zfcp_fsf_control_file - control file upload/download
2478 * @adapter: pointer to struct zfcp_adapter
2479 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2480 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2482 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2483 struct zfcp_fsf_cfdc *fsf_cfdc)
2485 struct qdio_buffer_element *sbale;
2486 struct zfcp_fsf_req *req = NULL;
2487 struct fsf_qtcb_bottom_support *bottom;
2488 int direction, retval = -EIO, bytes;
2490 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2491 return ERR_PTR(-EOPNOTSUPP);
2493 switch (fsf_cfdc->command) {
2494 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2495 direction = SBAL_FLAGS0_TYPE_WRITE;
2497 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2498 direction = SBAL_FLAGS0_TYPE_READ;
2501 return ERR_PTR(-EINVAL);
2504 spin_lock_bh(&adapter->req_q_lock);
2505 if (zfcp_fsf_req_sbal_get(adapter))
2508 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2514 req->handler = zfcp_fsf_control_file_handler;
2516 sbale = zfcp_qdio_sbale_req(req);
2517 sbale[0].flags |= direction;
2519 bottom = &req->qtcb->bottom.support;
2520 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2521 bottom->option = fsf_cfdc->option;
2523 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2524 FSF_MAX_SBALS_PER_REQ);
2525 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2527 zfcp_fsf_req_free(req);
2531 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2532 retval = zfcp_fsf_req_send(req);
2534 spin_unlock_bh(&adapter->req_q_lock);
2537 wait_event(req->completion_wq,
2538 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2541 return ERR_PTR(retval);