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Merge tag 'media/v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corp. 2002, 2017
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_or(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 case FSF_STATUS_READ_SUB_FDISC_FAILED:
201 zfcp_fsf_link_down_info_eval(req, ldi);
202 break;
203 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
204 zfcp_fsf_link_down_info_eval(req, NULL);
205 }
206 }
207
208 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
209 {
210 struct zfcp_adapter *adapter = req->adapter;
211 struct fsf_status_read_buffer *sr_buf = req->data;
212
213 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
214 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
215 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
216 zfcp_fsf_req_free(req);
217 return;
218 }
219
220 zfcp_dbf_hba_fsf_uss("fssrh_4", req);
221
222 switch (sr_buf->status_type) {
223 case FSF_STATUS_READ_PORT_CLOSED:
224 zfcp_fsf_status_read_port_closed(req);
225 break;
226 case FSF_STATUS_READ_INCOMING_ELS:
227 zfcp_fc_incoming_els(req);
228 break;
229 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
230 break;
231 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
232 dev_warn(&adapter->ccw_device->dev,
233 "The error threshold for checksum statistics "
234 "has been exceeded\n");
235 zfcp_dbf_hba_bit_err("fssrh_3", req);
236 break;
237 case FSF_STATUS_READ_LINK_DOWN:
238 zfcp_fsf_status_read_link_down(req);
239 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
240 break;
241 case FSF_STATUS_READ_LINK_UP:
242 dev_info(&adapter->ccw_device->dev,
243 "The local link has been restored\n");
244 /* All ports should be marked as ready to run again */
245 zfcp_erp_set_adapter_status(adapter,
246 ZFCP_STATUS_COMMON_RUNNING);
247 zfcp_erp_adapter_reopen(adapter,
248 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
249 ZFCP_STATUS_COMMON_ERP_FAILED,
250 "fssrh_2");
251 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
252
253 break;
254 case FSF_STATUS_READ_NOTIFICATION_LOST:
255 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
256 zfcp_fc_conditional_port_scan(adapter);
257 break;
258 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
259 adapter->adapter_features = sr_buf->payload.word[0];
260 break;
261 }
262
263 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
264 zfcp_fsf_req_free(req);
265
266 atomic_inc(&adapter->stat_miss);
267 queue_work(adapter->work_queue, &adapter->stat_work);
268 }
269
270 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
271 {
272 switch (req->qtcb->header.fsf_status_qual.word[0]) {
273 case FSF_SQ_FCP_RSP_AVAILABLE:
274 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
275 case FSF_SQ_NO_RETRY_POSSIBLE:
276 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
277 return;
278 case FSF_SQ_COMMAND_ABORTED:
279 break;
280 case FSF_SQ_NO_RECOM:
281 dev_err(&req->adapter->ccw_device->dev,
282 "The FCP adapter reported a problem "
283 "that cannot be recovered\n");
284 zfcp_qdio_siosl(req->adapter);
285 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
286 break;
287 }
288 /* all non-return stats set FSFREQ_ERROR*/
289 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
290 }
291
292 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
293 {
294 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
295 return;
296
297 switch (req->qtcb->header.fsf_status) {
298 case FSF_UNKNOWN_COMMAND:
299 dev_err(&req->adapter->ccw_device->dev,
300 "The FCP adapter does not recognize the command 0x%x\n",
301 req->qtcb->header.fsf_command);
302 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
303 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
304 break;
305 case FSF_ADAPTER_STATUS_AVAILABLE:
306 zfcp_fsf_fsfstatus_qual_eval(req);
307 break;
308 }
309 }
310
311 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
312 {
313 struct zfcp_adapter *adapter = req->adapter;
314 struct fsf_qtcb *qtcb = req->qtcb;
315 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
316
317 zfcp_dbf_hba_fsf_response(req);
318
319 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
320 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
321 return;
322 }
323
324 switch (qtcb->prefix.prot_status) {
325 case FSF_PROT_GOOD:
326 case FSF_PROT_FSF_STATUS_PRESENTED:
327 return;
328 case FSF_PROT_QTCB_VERSION_ERROR:
329 dev_err(&adapter->ccw_device->dev,
330 "QTCB version 0x%x not supported by FCP adapter "
331 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
332 psq->word[0], psq->word[1]);
333 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
334 break;
335 case FSF_PROT_ERROR_STATE:
336 case FSF_PROT_SEQ_NUMB_ERROR:
337 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
338 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
339 break;
340 case FSF_PROT_UNSUPP_QTCB_TYPE:
341 dev_err(&adapter->ccw_device->dev,
342 "The QTCB type is not supported by the FCP adapter\n");
343 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
344 break;
345 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
346 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
347 &adapter->status);
348 break;
349 case FSF_PROT_DUPLICATE_REQUEST_ID:
350 dev_err(&adapter->ccw_device->dev,
351 "0x%Lx is an ambiguous request identifier\n",
352 (unsigned long long)qtcb->bottom.support.req_handle);
353 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
354 break;
355 case FSF_PROT_LINK_DOWN:
356 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
357 /* go through reopen to flush pending requests */
358 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
359 break;
360 case FSF_PROT_REEST_QUEUE:
361 /* All ports should be marked as ready to run again */
362 zfcp_erp_set_adapter_status(adapter,
363 ZFCP_STATUS_COMMON_RUNNING);
364 zfcp_erp_adapter_reopen(adapter,
365 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
366 ZFCP_STATUS_COMMON_ERP_FAILED,
367 "fspse_8");
368 break;
369 default:
370 dev_err(&adapter->ccw_device->dev,
371 "0x%x is not a valid transfer protocol status\n",
372 qtcb->prefix.prot_status);
373 zfcp_qdio_siosl(adapter);
374 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
375 }
376 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
377 }
378
379 /**
380 * zfcp_fsf_req_complete - process completion of a FSF request
381 * @fsf_req: The FSF request that has been completed.
382 *
383 * When a request has been completed either from the FCP adapter,
384 * or it has been dismissed due to a queue shutdown, this function
385 * is called to process the completion status and trigger further
386 * events related to the FSF request.
387 */
388 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
389 {
390 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
391 zfcp_fsf_status_read_handler(req);
392 return;
393 }
394
395 del_timer(&req->timer);
396 zfcp_fsf_protstatus_eval(req);
397 zfcp_fsf_fsfstatus_eval(req);
398 req->handler(req);
399
400 if (req->erp_action)
401 zfcp_erp_notify(req->erp_action, 0);
402
403 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
404 zfcp_fsf_req_free(req);
405 else
406 complete(&req->completion);
407 }
408
409 /**
410 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
411 * @adapter: pointer to struct zfcp_adapter
412 *
413 * Never ever call this without shutting down the adapter first.
414 * Otherwise the adapter would continue using and corrupting s390 storage.
415 * Included BUG_ON() call to ensure this is done.
416 * ERP is supposed to be the only user of this function.
417 */
418 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
419 {
420 struct zfcp_fsf_req *req, *tmp;
421 LIST_HEAD(remove_queue);
422
423 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
424 zfcp_reqlist_move(adapter->req_list, &remove_queue);
425
426 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
427 list_del(&req->list);
428 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
429 zfcp_fsf_req_complete(req);
430 }
431 }
432
433 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
434 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
435 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
436 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
437 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
438 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
439 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
440
441 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
442 {
443 u32 fdmi_speed = 0;
444 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
445 fdmi_speed |= FC_PORTSPEED_1GBIT;
446 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
447 fdmi_speed |= FC_PORTSPEED_2GBIT;
448 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
449 fdmi_speed |= FC_PORTSPEED_4GBIT;
450 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
451 fdmi_speed |= FC_PORTSPEED_10GBIT;
452 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
453 fdmi_speed |= FC_PORTSPEED_8GBIT;
454 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
455 fdmi_speed |= FC_PORTSPEED_16GBIT;
456 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
457 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
458 return fdmi_speed;
459 }
460
461 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
462 {
463 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
464 struct zfcp_adapter *adapter = req->adapter;
465 struct Scsi_Host *shost = adapter->scsi_host;
466 struct fc_els_flogi *nsp, *plogi;
467
468 /* adjust pointers for missing command code */
469 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
470 - sizeof(u32));
471 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
472 - sizeof(u32));
473
474 if (req->data)
475 memcpy(req->data, bottom, sizeof(*bottom));
476
477 fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
478 fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
479 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
480
481 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
482 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
483 (u16)FSF_STATUS_READS_RECOM);
484
485 if (fc_host_permanent_port_name(shost) == -1)
486 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
487
488 zfcp_scsi_set_prot(adapter);
489
490 /* no error return above here, otherwise must fix call chains */
491 /* do not evaluate invalid fields */
492 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
493 return 0;
494
495 fc_host_port_id(shost) = ntoh24(bottom->s_id);
496 fc_host_speed(shost) =
497 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
498
499 adapter->hydra_version = bottom->adapter_type;
500
501 switch (bottom->fc_topology) {
502 case FSF_TOPO_P2P:
503 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
504 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
505 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
506 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
507 break;
508 case FSF_TOPO_FABRIC:
509 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
510 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
511 else
512 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
513 break;
514 case FSF_TOPO_AL:
515 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
516 /* fall through */
517 default:
518 dev_err(&adapter->ccw_device->dev,
519 "Unknown or unsupported arbitrated loop "
520 "fibre channel topology detected\n");
521 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
522 return -EIO;
523 }
524
525 return 0;
526 }
527
528 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
529 {
530 struct zfcp_adapter *adapter = req->adapter;
531 struct fsf_qtcb *qtcb = req->qtcb;
532 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
533 struct Scsi_Host *shost = adapter->scsi_host;
534
535 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
536 return;
537
538 adapter->fsf_lic_version = bottom->lic_version;
539 adapter->adapter_features = bottom->adapter_features;
540 adapter->connection_features = bottom->connection_features;
541 adapter->peer_wwpn = 0;
542 adapter->peer_wwnn = 0;
543 adapter->peer_d_id = 0;
544
545 switch (qtcb->header.fsf_status) {
546 case FSF_GOOD:
547 if (zfcp_fsf_exchange_config_evaluate(req))
548 return;
549
550 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
551 dev_err(&adapter->ccw_device->dev,
552 "FCP adapter maximum QTCB size (%d bytes) "
553 "is too small\n",
554 bottom->max_qtcb_size);
555 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
556 return;
557 }
558 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
559 &adapter->status);
560 break;
561 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
562 fc_host_node_name(shost) = 0;
563 fc_host_port_name(shost) = 0;
564 fc_host_port_id(shost) = 0;
565 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
566 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
567 adapter->hydra_version = 0;
568
569 /* avoids adapter shutdown to be able to recognize
570 * events such as LINK UP */
571 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
572 &adapter->status);
573 zfcp_fsf_link_down_info_eval(req,
574 &qtcb->header.fsf_status_qual.link_down_info);
575 if (zfcp_fsf_exchange_config_evaluate(req))
576 return;
577 break;
578 default:
579 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
580 return;
581 }
582
583 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
584 adapter->hardware_version = bottom->hardware_version;
585 memcpy(fc_host_serial_number(shost), bottom->serial_number,
586 min(FC_SERIAL_NUMBER_SIZE, 17));
587 EBCASC(fc_host_serial_number(shost),
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 }
590
591 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
592 dev_err(&adapter->ccw_device->dev,
593 "The FCP adapter only supports newer "
594 "control block versions\n");
595 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
596 return;
597 }
598 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
599 dev_err(&adapter->ccw_device->dev,
600 "The FCP adapter only supports older "
601 "control block versions\n");
602 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
603 }
604 }
605
606 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
607 {
608 struct zfcp_adapter *adapter = req->adapter;
609 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
610 struct Scsi_Host *shost = adapter->scsi_host;
611
612 if (req->data)
613 memcpy(req->data, bottom, sizeof(*bottom));
614
615 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
616 fc_host_permanent_port_name(shost) = bottom->wwpn;
617 } else
618 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
619 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
620 fc_host_supported_speeds(shost) =
621 zfcp_fsf_convert_portspeed(bottom->supported_speed);
622 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
623 FC_FC4_LIST_SIZE);
624 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
625 FC_FC4_LIST_SIZE);
626 }
627
628 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
629 {
630 struct fsf_qtcb *qtcb = req->qtcb;
631
632 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
633 return;
634
635 switch (qtcb->header.fsf_status) {
636 case FSF_GOOD:
637 zfcp_fsf_exchange_port_evaluate(req);
638 break;
639 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
640 zfcp_fsf_exchange_port_evaluate(req);
641 zfcp_fsf_link_down_info_eval(req,
642 &qtcb->header.fsf_status_qual.link_down_info);
643 break;
644 }
645 }
646
647 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
648 {
649 struct zfcp_fsf_req *req;
650
651 if (likely(pool))
652 req = mempool_alloc(pool, GFP_ATOMIC);
653 else
654 req = kmalloc(sizeof(*req), GFP_ATOMIC);
655
656 if (unlikely(!req))
657 return NULL;
658
659 memset(req, 0, sizeof(*req));
660 req->pool = pool;
661 return req;
662 }
663
664 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
665 {
666 struct fsf_qtcb *qtcb;
667
668 if (likely(pool))
669 qtcb = mempool_alloc(pool, GFP_ATOMIC);
670 else
671 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
672
673 if (unlikely(!qtcb))
674 return NULL;
675
676 memset(qtcb, 0, sizeof(*qtcb));
677 return qtcb;
678 }
679
680 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
681 u32 fsf_cmd, u8 sbtype,
682 mempool_t *pool)
683 {
684 struct zfcp_adapter *adapter = qdio->adapter;
685 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
686
687 if (unlikely(!req))
688 return ERR_PTR(-ENOMEM);
689
690 if (adapter->req_no == 0)
691 adapter->req_no++;
692
693 INIT_LIST_HEAD(&req->list);
694 init_timer(&req->timer);
695 init_completion(&req->completion);
696
697 req->adapter = adapter;
698 req->fsf_command = fsf_cmd;
699 req->req_id = adapter->req_no;
700
701 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
702 if (likely(pool))
703 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
704 else
705 req->qtcb = zfcp_qtcb_alloc(NULL);
706
707 if (unlikely(!req->qtcb)) {
708 zfcp_fsf_req_free(req);
709 return ERR_PTR(-ENOMEM);
710 }
711
712 req->seq_no = adapter->fsf_req_seq_no;
713 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
714 req->qtcb->prefix.req_id = req->req_id;
715 req->qtcb->prefix.ulp_info = 26;
716 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
717 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
718 req->qtcb->header.req_handle = req->req_id;
719 req->qtcb->header.fsf_command = req->fsf_command;
720 }
721
722 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
723 req->qtcb, sizeof(struct fsf_qtcb));
724
725 return req;
726 }
727
728 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
729 {
730 struct zfcp_adapter *adapter = req->adapter;
731 struct zfcp_qdio *qdio = adapter->qdio;
732 int with_qtcb = (req->qtcb != NULL);
733 int req_id = req->req_id;
734
735 zfcp_reqlist_add(adapter->req_list, req);
736
737 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
738 req->issued = get_tod_clock();
739 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
740 del_timer(&req->timer);
741 /* lookup request again, list might have changed */
742 zfcp_reqlist_find_rm(adapter->req_list, req_id);
743 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
744 return -EIO;
745 }
746
747 /* Don't increase for unsolicited status */
748 if (with_qtcb)
749 adapter->fsf_req_seq_no++;
750 adapter->req_no++;
751
752 return 0;
753 }
754
755 /**
756 * zfcp_fsf_status_read - send status read request
757 * @adapter: pointer to struct zfcp_adapter
758 * @req_flags: request flags
759 * Returns: 0 on success, ERROR otherwise
760 */
761 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
762 {
763 struct zfcp_adapter *adapter = qdio->adapter;
764 struct zfcp_fsf_req *req;
765 struct fsf_status_read_buffer *sr_buf;
766 struct page *page;
767 int retval = -EIO;
768
769 spin_lock_irq(&qdio->req_q_lock);
770 if (zfcp_qdio_sbal_get(qdio))
771 goto out;
772
773 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
774 SBAL_SFLAGS0_TYPE_STATUS,
775 adapter->pool.status_read_req);
776 if (IS_ERR(req)) {
777 retval = PTR_ERR(req);
778 goto out;
779 }
780
781 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
782 if (!page) {
783 retval = -ENOMEM;
784 goto failed_buf;
785 }
786 sr_buf = page_address(page);
787 memset(sr_buf, 0, sizeof(*sr_buf));
788 req->data = sr_buf;
789
790 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
791 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
792
793 retval = zfcp_fsf_req_send(req);
794 if (retval)
795 goto failed_req_send;
796
797 goto out;
798
799 failed_req_send:
800 req->data = NULL;
801 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
802 failed_buf:
803 zfcp_dbf_hba_fsf_uss("fssr__1", req);
804 zfcp_fsf_req_free(req);
805 out:
806 spin_unlock_irq(&qdio->req_q_lock);
807 return retval;
808 }
809
810 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
811 {
812 struct scsi_device *sdev = req->data;
813 struct zfcp_scsi_dev *zfcp_sdev;
814 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
815
816 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
817 return;
818
819 zfcp_sdev = sdev_to_zfcp(sdev);
820
821 switch (req->qtcb->header.fsf_status) {
822 case FSF_PORT_HANDLE_NOT_VALID:
823 if (fsq->word[0] == fsq->word[1]) {
824 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
825 "fsafch1");
826 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
827 }
828 break;
829 case FSF_LUN_HANDLE_NOT_VALID:
830 if (fsq->word[0] == fsq->word[1]) {
831 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
832 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
833 }
834 break;
835 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
836 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
837 break;
838 case FSF_PORT_BOXED:
839 zfcp_erp_set_port_status(zfcp_sdev->port,
840 ZFCP_STATUS_COMMON_ACCESS_BOXED);
841 zfcp_erp_port_reopen(zfcp_sdev->port,
842 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
843 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
844 break;
845 case FSF_LUN_BOXED:
846 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
847 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
848 "fsafch4");
849 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
850 break;
851 case FSF_ADAPTER_STATUS_AVAILABLE:
852 switch (fsq->word[0]) {
853 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
854 zfcp_fc_test_link(zfcp_sdev->port);
855 /* fall through */
856 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
858 break;
859 }
860 break;
861 case FSF_GOOD:
862 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
863 break;
864 }
865 }
866
867 /**
868 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
869 * @scmnd: The SCSI command to abort
870 * Returns: pointer to struct zfcp_fsf_req
871 */
872
873 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
874 {
875 struct zfcp_fsf_req *req = NULL;
876 struct scsi_device *sdev = scmnd->device;
877 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
878 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
879 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
880
881 spin_lock_irq(&qdio->req_q_lock);
882 if (zfcp_qdio_sbal_get(qdio))
883 goto out;
884 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
885 SBAL_SFLAGS0_TYPE_READ,
886 qdio->adapter->pool.scsi_abort);
887 if (IS_ERR(req)) {
888 req = NULL;
889 goto out;
890 }
891
892 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
893 ZFCP_STATUS_COMMON_UNBLOCKED)))
894 goto out_error_free;
895
896 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
897
898 req->data = sdev;
899 req->handler = zfcp_fsf_abort_fcp_command_handler;
900 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
901 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
902 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
903
904 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
905 if (!zfcp_fsf_req_send(req))
906 goto out;
907
908 out_error_free:
909 zfcp_fsf_req_free(req);
910 req = NULL;
911 out:
912 spin_unlock_irq(&qdio->req_q_lock);
913 return req;
914 }
915
916 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
917 {
918 struct zfcp_adapter *adapter = req->adapter;
919 struct zfcp_fsf_ct_els *ct = req->data;
920 struct fsf_qtcb_header *header = &req->qtcb->header;
921
922 ct->status = -EINVAL;
923
924 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
925 goto skip_fsfstatus;
926
927 switch (header->fsf_status) {
928 case FSF_GOOD:
929 ct->status = 0;
930 zfcp_dbf_san_res("fsscth2", req);
931 break;
932 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
933 zfcp_fsf_class_not_supp(req);
934 break;
935 case FSF_ADAPTER_STATUS_AVAILABLE:
936 switch (header->fsf_status_qual.word[0]){
937 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
938 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
939 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
940 break;
941 }
942 break;
943 case FSF_PORT_BOXED:
944 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
945 break;
946 case FSF_PORT_HANDLE_NOT_VALID:
947 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
948 /* fall through */
949 case FSF_GENERIC_COMMAND_REJECTED:
950 case FSF_PAYLOAD_SIZE_MISMATCH:
951 case FSF_REQUEST_SIZE_TOO_LARGE:
952 case FSF_RESPONSE_SIZE_TOO_LARGE:
953 case FSF_SBAL_MISMATCH:
954 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
955 break;
956 }
957
958 skip_fsfstatus:
959 if (ct->handler)
960 ct->handler(ct->handler_data);
961 }
962
963 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
964 struct zfcp_qdio_req *q_req,
965 struct scatterlist *sg_req,
966 struct scatterlist *sg_resp)
967 {
968 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
969 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
970 zfcp_qdio_set_sbale_last(qdio, q_req);
971 }
972
973 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
974 struct scatterlist *sg_req,
975 struct scatterlist *sg_resp)
976 {
977 struct zfcp_adapter *adapter = req->adapter;
978 struct zfcp_qdio *qdio = adapter->qdio;
979 struct fsf_qtcb *qtcb = req->qtcb;
980 u32 feat = adapter->adapter_features;
981
982 if (zfcp_adapter_multi_buffer_active(adapter)) {
983 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
984 return -EIO;
985 qtcb->bottom.support.req_buf_length =
986 zfcp_qdio_real_bytes(sg_req);
987 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
988 return -EIO;
989 qtcb->bottom.support.resp_buf_length =
990 zfcp_qdio_real_bytes(sg_resp);
991
992 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
993 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
994 zfcp_qdio_set_scount(qdio, &req->qdio_req);
995 return 0;
996 }
997
998 /* use single, unchained SBAL if it can hold the request */
999 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1000 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1001 sg_req, sg_resp);
1002 return 0;
1003 }
1004
1005 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1006 return -EOPNOTSUPP;
1007
1008 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1009 return -EIO;
1010
1011 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1012
1013 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1014 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1015
1016 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1017 return -EIO;
1018
1019 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1020
1021 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1022
1023 return 0;
1024 }
1025
1026 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1027 struct scatterlist *sg_req,
1028 struct scatterlist *sg_resp,
1029 unsigned int timeout)
1030 {
1031 int ret;
1032
1033 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1034 if (ret)
1035 return ret;
1036
1037 /* common settings for ct/gs and els requests */
1038 if (timeout > 255)
1039 timeout = 255; /* max value accepted by hardware */
1040 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1041 req->qtcb->bottom.support.timeout = timeout;
1042 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1043
1044 return 0;
1045 }
1046
1047 /**
1048 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1049 * @ct: pointer to struct zfcp_send_ct with data for request
1050 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1051 */
1052 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1053 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1054 unsigned int timeout)
1055 {
1056 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1057 struct zfcp_fsf_req *req;
1058 int ret = -EIO;
1059
1060 spin_lock_irq(&qdio->req_q_lock);
1061 if (zfcp_qdio_sbal_get(qdio))
1062 goto out;
1063
1064 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1065 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1066
1067 if (IS_ERR(req)) {
1068 ret = PTR_ERR(req);
1069 goto out;
1070 }
1071
1072 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1073 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1074 if (ret)
1075 goto failed_send;
1076
1077 req->handler = zfcp_fsf_send_ct_handler;
1078 req->qtcb->header.port_handle = wka_port->handle;
1079 ct->d_id = wka_port->d_id;
1080 req->data = ct;
1081
1082 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1083
1084 ret = zfcp_fsf_req_send(req);
1085 if (ret)
1086 goto failed_send;
1087
1088 goto out;
1089
1090 failed_send:
1091 zfcp_fsf_req_free(req);
1092 out:
1093 spin_unlock_irq(&qdio->req_q_lock);
1094 return ret;
1095 }
1096
1097 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1098 {
1099 struct zfcp_fsf_ct_els *send_els = req->data;
1100 struct fsf_qtcb_header *header = &req->qtcb->header;
1101
1102 send_els->status = -EINVAL;
1103
1104 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1105 goto skip_fsfstatus;
1106
1107 switch (header->fsf_status) {
1108 case FSF_GOOD:
1109 send_els->status = 0;
1110 zfcp_dbf_san_res("fsselh1", req);
1111 break;
1112 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1113 zfcp_fsf_class_not_supp(req);
1114 break;
1115 case FSF_ADAPTER_STATUS_AVAILABLE:
1116 switch (header->fsf_status_qual.word[0]){
1117 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1118 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1119 case FSF_SQ_RETRY_IF_POSSIBLE:
1120 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1121 break;
1122 }
1123 break;
1124 case FSF_ELS_COMMAND_REJECTED:
1125 case FSF_PAYLOAD_SIZE_MISMATCH:
1126 case FSF_REQUEST_SIZE_TOO_LARGE:
1127 case FSF_RESPONSE_SIZE_TOO_LARGE:
1128 break;
1129 case FSF_SBAL_MISMATCH:
1130 /* should never occur, avoided in zfcp_fsf_send_els */
1131 /* fall through */
1132 default:
1133 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1134 break;
1135 }
1136 skip_fsfstatus:
1137 if (send_els->handler)
1138 send_els->handler(send_els->handler_data);
1139 }
1140
1141 /**
1142 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1143 * @els: pointer to struct zfcp_send_els with data for the command
1144 */
1145 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1146 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1147 {
1148 struct zfcp_fsf_req *req;
1149 struct zfcp_qdio *qdio = adapter->qdio;
1150 int ret = -EIO;
1151
1152 spin_lock_irq(&qdio->req_q_lock);
1153 if (zfcp_qdio_sbal_get(qdio))
1154 goto out;
1155
1156 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1157 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1158
1159 if (IS_ERR(req)) {
1160 ret = PTR_ERR(req);
1161 goto out;
1162 }
1163
1164 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1165
1166 if (!zfcp_adapter_multi_buffer_active(adapter))
1167 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1168
1169 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1170
1171 if (ret)
1172 goto failed_send;
1173
1174 hton24(req->qtcb->bottom.support.d_id, d_id);
1175 req->handler = zfcp_fsf_send_els_handler;
1176 els->d_id = d_id;
1177 req->data = els;
1178
1179 zfcp_dbf_san_req("fssels1", req, d_id);
1180
1181 ret = zfcp_fsf_req_send(req);
1182 if (ret)
1183 goto failed_send;
1184
1185 goto out;
1186
1187 failed_send:
1188 zfcp_fsf_req_free(req);
1189 out:
1190 spin_unlock_irq(&qdio->req_q_lock);
1191 return ret;
1192 }
1193
1194 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1195 {
1196 struct zfcp_fsf_req *req;
1197 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1198 int retval = -EIO;
1199
1200 spin_lock_irq(&qdio->req_q_lock);
1201 if (zfcp_qdio_sbal_get(qdio))
1202 goto out;
1203
1204 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1205 SBAL_SFLAGS0_TYPE_READ,
1206 qdio->adapter->pool.erp_req);
1207
1208 if (IS_ERR(req)) {
1209 retval = PTR_ERR(req);
1210 goto out;
1211 }
1212
1213 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1214 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1215
1216 req->qtcb->bottom.config.feature_selection =
1217 FSF_FEATURE_NOTIFICATION_LOST |
1218 FSF_FEATURE_UPDATE_ALERT;
1219 req->erp_action = erp_action;
1220 req->handler = zfcp_fsf_exchange_config_data_handler;
1221 erp_action->fsf_req_id = req->req_id;
1222
1223 zfcp_fsf_start_erp_timer(req);
1224 retval = zfcp_fsf_req_send(req);
1225 if (retval) {
1226 zfcp_fsf_req_free(req);
1227 erp_action->fsf_req_id = 0;
1228 }
1229 out:
1230 spin_unlock_irq(&qdio->req_q_lock);
1231 return retval;
1232 }
1233
1234 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1235 struct fsf_qtcb_bottom_config *data)
1236 {
1237 struct zfcp_fsf_req *req = NULL;
1238 int retval = -EIO;
1239
1240 spin_lock_irq(&qdio->req_q_lock);
1241 if (zfcp_qdio_sbal_get(qdio))
1242 goto out_unlock;
1243
1244 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245 SBAL_SFLAGS0_TYPE_READ, NULL);
1246
1247 if (IS_ERR(req)) {
1248 retval = PTR_ERR(req);
1249 goto out_unlock;
1250 }
1251
1252 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1253 req->handler = zfcp_fsf_exchange_config_data_handler;
1254
1255 req->qtcb->bottom.config.feature_selection =
1256 FSF_FEATURE_NOTIFICATION_LOST |
1257 FSF_FEATURE_UPDATE_ALERT;
1258
1259 if (data)
1260 req->data = data;
1261
1262 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1263 retval = zfcp_fsf_req_send(req);
1264 spin_unlock_irq(&qdio->req_q_lock);
1265 if (!retval)
1266 wait_for_completion(&req->completion);
1267
1268 zfcp_fsf_req_free(req);
1269 return retval;
1270
1271 out_unlock:
1272 spin_unlock_irq(&qdio->req_q_lock);
1273 return retval;
1274 }
1275
1276 /**
1277 * zfcp_fsf_exchange_port_data - request information about local port
1278 * @erp_action: ERP action for the adapter for which port data is requested
1279 * Returns: 0 on success, error otherwise
1280 */
1281 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1282 {
1283 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1284 struct zfcp_fsf_req *req;
1285 int retval = -EIO;
1286
1287 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1288 return -EOPNOTSUPP;
1289
1290 spin_lock_irq(&qdio->req_q_lock);
1291 if (zfcp_qdio_sbal_get(qdio))
1292 goto out;
1293
1294 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1295 SBAL_SFLAGS0_TYPE_READ,
1296 qdio->adapter->pool.erp_req);
1297
1298 if (IS_ERR(req)) {
1299 retval = PTR_ERR(req);
1300 goto out;
1301 }
1302
1303 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1304 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1305
1306 req->handler = zfcp_fsf_exchange_port_data_handler;
1307 req->erp_action = erp_action;
1308 erp_action->fsf_req_id = req->req_id;
1309
1310 zfcp_fsf_start_erp_timer(req);
1311 retval = zfcp_fsf_req_send(req);
1312 if (retval) {
1313 zfcp_fsf_req_free(req);
1314 erp_action->fsf_req_id = 0;
1315 }
1316 out:
1317 spin_unlock_irq(&qdio->req_q_lock);
1318 return retval;
1319 }
1320
1321 /**
1322 * zfcp_fsf_exchange_port_data_sync - request information about local port
1323 * @qdio: pointer to struct zfcp_qdio
1324 * @data: pointer to struct fsf_qtcb_bottom_port
1325 * Returns: 0 on success, error otherwise
1326 */
1327 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1328 struct fsf_qtcb_bottom_port *data)
1329 {
1330 struct zfcp_fsf_req *req = NULL;
1331 int retval = -EIO;
1332
1333 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1334 return -EOPNOTSUPP;
1335
1336 spin_lock_irq(&qdio->req_q_lock);
1337 if (zfcp_qdio_sbal_get(qdio))
1338 goto out_unlock;
1339
1340 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1341 SBAL_SFLAGS0_TYPE_READ, NULL);
1342
1343 if (IS_ERR(req)) {
1344 retval = PTR_ERR(req);
1345 goto out_unlock;
1346 }
1347
1348 if (data)
1349 req->data = data;
1350
1351 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1352
1353 req->handler = zfcp_fsf_exchange_port_data_handler;
1354 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1355 retval = zfcp_fsf_req_send(req);
1356 spin_unlock_irq(&qdio->req_q_lock);
1357
1358 if (!retval)
1359 wait_for_completion(&req->completion);
1360
1361 zfcp_fsf_req_free(req);
1362
1363 return retval;
1364
1365 out_unlock:
1366 spin_unlock_irq(&qdio->req_q_lock);
1367 return retval;
1368 }
1369
1370 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1371 {
1372 struct zfcp_port *port = req->data;
1373 struct fsf_qtcb_header *header = &req->qtcb->header;
1374 struct fc_els_flogi *plogi;
1375
1376 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1377 goto out;
1378
1379 switch (header->fsf_status) {
1380 case FSF_PORT_ALREADY_OPEN:
1381 break;
1382 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1383 dev_warn(&req->adapter->ccw_device->dev,
1384 "Not enough FCP adapter resources to open "
1385 "remote port 0x%016Lx\n",
1386 (unsigned long long)port->wwpn);
1387 zfcp_erp_set_port_status(port,
1388 ZFCP_STATUS_COMMON_ERP_FAILED);
1389 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1390 break;
1391 case FSF_ADAPTER_STATUS_AVAILABLE:
1392 switch (header->fsf_status_qual.word[0]) {
1393 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1394 /* no zfcp_fc_test_link() with failed open port */
1395 /* fall through */
1396 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1397 case FSF_SQ_NO_RETRY_POSSIBLE:
1398 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1399 break;
1400 }
1401 break;
1402 case FSF_GOOD:
1403 port->handle = header->port_handle;
1404 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1405 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1406 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1407 &port->status);
1408 /* check whether D_ID has changed during open */
1409 /*
1410 * FIXME: This check is not airtight, as the FCP channel does
1411 * not monitor closures of target port connections caused on
1412 * the remote side. Thus, they might miss out on invalidating
1413 * locally cached WWPNs (and other N_Port parameters) of gone
1414 * target ports. So, our heroic attempt to make things safe
1415 * could be undermined by 'open port' response data tagged with
1416 * obsolete WWPNs. Another reason to monitor potential
1417 * connection closures ourself at least (by interpreting
1418 * incoming ELS' and unsolicited status). It just crosses my
1419 * mind that one should be able to cross-check by means of
1420 * another GID_PN straight after a port has been opened.
1421 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1422 */
1423 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1424 if (req->qtcb->bottom.support.els1_length >=
1425 FSF_PLOGI_MIN_LEN)
1426 zfcp_fc_plogi_evaluate(port, plogi);
1427 break;
1428 case FSF_UNKNOWN_OP_SUBTYPE:
1429 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1430 break;
1431 }
1432
1433 out:
1434 put_device(&port->dev);
1435 }
1436
1437 /**
1438 * zfcp_fsf_open_port - create and send open port request
1439 * @erp_action: pointer to struct zfcp_erp_action
1440 * Returns: 0 on success, error otherwise
1441 */
1442 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1443 {
1444 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1445 struct zfcp_port *port = erp_action->port;
1446 struct zfcp_fsf_req *req;
1447 int retval = -EIO;
1448
1449 spin_lock_irq(&qdio->req_q_lock);
1450 if (zfcp_qdio_sbal_get(qdio))
1451 goto out;
1452
1453 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1454 SBAL_SFLAGS0_TYPE_READ,
1455 qdio->adapter->pool.erp_req);
1456
1457 if (IS_ERR(req)) {
1458 retval = PTR_ERR(req);
1459 goto out;
1460 }
1461
1462 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1463 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1464
1465 req->handler = zfcp_fsf_open_port_handler;
1466 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1467 req->data = port;
1468 req->erp_action = erp_action;
1469 erp_action->fsf_req_id = req->req_id;
1470 get_device(&port->dev);
1471
1472 zfcp_fsf_start_erp_timer(req);
1473 retval = zfcp_fsf_req_send(req);
1474 if (retval) {
1475 zfcp_fsf_req_free(req);
1476 erp_action->fsf_req_id = 0;
1477 put_device(&port->dev);
1478 }
1479 out:
1480 spin_unlock_irq(&qdio->req_q_lock);
1481 return retval;
1482 }
1483
1484 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1485 {
1486 struct zfcp_port *port = req->data;
1487
1488 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1489 return;
1490
1491 switch (req->qtcb->header.fsf_status) {
1492 case FSF_PORT_HANDLE_NOT_VALID:
1493 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1494 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1495 break;
1496 case FSF_ADAPTER_STATUS_AVAILABLE:
1497 break;
1498 case FSF_GOOD:
1499 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1500 break;
1501 }
1502 }
1503
1504 /**
1505 * zfcp_fsf_close_port - create and send close port request
1506 * @erp_action: pointer to struct zfcp_erp_action
1507 * Returns: 0 on success, error otherwise
1508 */
1509 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1510 {
1511 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1512 struct zfcp_fsf_req *req;
1513 int retval = -EIO;
1514
1515 spin_lock_irq(&qdio->req_q_lock);
1516 if (zfcp_qdio_sbal_get(qdio))
1517 goto out;
1518
1519 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1520 SBAL_SFLAGS0_TYPE_READ,
1521 qdio->adapter->pool.erp_req);
1522
1523 if (IS_ERR(req)) {
1524 retval = PTR_ERR(req);
1525 goto out;
1526 }
1527
1528 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1529 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1530
1531 req->handler = zfcp_fsf_close_port_handler;
1532 req->data = erp_action->port;
1533 req->erp_action = erp_action;
1534 req->qtcb->header.port_handle = erp_action->port->handle;
1535 erp_action->fsf_req_id = req->req_id;
1536
1537 zfcp_fsf_start_erp_timer(req);
1538 retval = zfcp_fsf_req_send(req);
1539 if (retval) {
1540 zfcp_fsf_req_free(req);
1541 erp_action->fsf_req_id = 0;
1542 }
1543 out:
1544 spin_unlock_irq(&qdio->req_q_lock);
1545 return retval;
1546 }
1547
1548 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1549 {
1550 struct zfcp_fc_wka_port *wka_port = req->data;
1551 struct fsf_qtcb_header *header = &req->qtcb->header;
1552
1553 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1554 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1555 goto out;
1556 }
1557
1558 switch (header->fsf_status) {
1559 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1560 dev_warn(&req->adapter->ccw_device->dev,
1561 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1562 /* fall through */
1563 case FSF_ADAPTER_STATUS_AVAILABLE:
1564 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1565 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1566 break;
1567 case FSF_GOOD:
1568 wka_port->handle = header->port_handle;
1569 /* fall through */
1570 case FSF_PORT_ALREADY_OPEN:
1571 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1572 }
1573 out:
1574 wake_up(&wka_port->completion_wq);
1575 }
1576
1577 /**
1578 * zfcp_fsf_open_wka_port - create and send open wka-port request
1579 * @wka_port: pointer to struct zfcp_fc_wka_port
1580 * Returns: 0 on success, error otherwise
1581 */
1582 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1583 {
1584 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1585 struct zfcp_fsf_req *req;
1586 int retval = -EIO;
1587
1588 spin_lock_irq(&qdio->req_q_lock);
1589 if (zfcp_qdio_sbal_get(qdio))
1590 goto out;
1591
1592 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1593 SBAL_SFLAGS0_TYPE_READ,
1594 qdio->adapter->pool.erp_req);
1595
1596 if (IS_ERR(req)) {
1597 retval = PTR_ERR(req);
1598 goto out;
1599 }
1600
1601 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1602 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1603
1604 req->handler = zfcp_fsf_open_wka_port_handler;
1605 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1606 req->data = wka_port;
1607
1608 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1609 retval = zfcp_fsf_req_send(req);
1610 if (retval)
1611 zfcp_fsf_req_free(req);
1612 out:
1613 spin_unlock_irq(&qdio->req_q_lock);
1614 if (!retval)
1615 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1616 return retval;
1617 }
1618
1619 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1620 {
1621 struct zfcp_fc_wka_port *wka_port = req->data;
1622
1623 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1624 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1625 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1626 }
1627
1628 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1629 wake_up(&wka_port->completion_wq);
1630 }
1631
1632 /**
1633 * zfcp_fsf_close_wka_port - create and send close wka port request
1634 * @wka_port: WKA port to open
1635 * Returns: 0 on success, error otherwise
1636 */
1637 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1638 {
1639 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1640 struct zfcp_fsf_req *req;
1641 int retval = -EIO;
1642
1643 spin_lock_irq(&qdio->req_q_lock);
1644 if (zfcp_qdio_sbal_get(qdio))
1645 goto out;
1646
1647 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1648 SBAL_SFLAGS0_TYPE_READ,
1649 qdio->adapter->pool.erp_req);
1650
1651 if (IS_ERR(req)) {
1652 retval = PTR_ERR(req);
1653 goto out;
1654 }
1655
1656 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1657 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1658
1659 req->handler = zfcp_fsf_close_wka_port_handler;
1660 req->data = wka_port;
1661 req->qtcb->header.port_handle = wka_port->handle;
1662
1663 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1664 retval = zfcp_fsf_req_send(req);
1665 if (retval)
1666 zfcp_fsf_req_free(req);
1667 out:
1668 spin_unlock_irq(&qdio->req_q_lock);
1669 if (!retval)
1670 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1671 return retval;
1672 }
1673
1674 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1675 {
1676 struct zfcp_port *port = req->data;
1677 struct fsf_qtcb_header *header = &req->qtcb->header;
1678 struct scsi_device *sdev;
1679
1680 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1681 return;
1682
1683 switch (header->fsf_status) {
1684 case FSF_PORT_HANDLE_NOT_VALID:
1685 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1686 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1687 break;
1688 case FSF_PORT_BOXED:
1689 /* can't use generic zfcp_erp_modify_port_status because
1690 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1691 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1692 shost_for_each_device(sdev, port->adapter->scsi_host)
1693 if (sdev_to_zfcp(sdev)->port == port)
1694 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1695 &sdev_to_zfcp(sdev)->status);
1696 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1697 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1698 "fscpph2");
1699 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1700 break;
1701 case FSF_ADAPTER_STATUS_AVAILABLE:
1702 switch (header->fsf_status_qual.word[0]) {
1703 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1704 /* fall through */
1705 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1706 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707 break;
1708 }
1709 break;
1710 case FSF_GOOD:
1711 /* can't use generic zfcp_erp_modify_port_status because
1712 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1713 */
1714 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1715 shost_for_each_device(sdev, port->adapter->scsi_host)
1716 if (sdev_to_zfcp(sdev)->port == port)
1717 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1718 &sdev_to_zfcp(sdev)->status);
1719 break;
1720 }
1721 }
1722
1723 /**
1724 * zfcp_fsf_close_physical_port - close physical port
1725 * @erp_action: pointer to struct zfcp_erp_action
1726 * Returns: 0 on success
1727 */
1728 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1729 {
1730 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1731 struct zfcp_fsf_req *req;
1732 int retval = -EIO;
1733
1734 spin_lock_irq(&qdio->req_q_lock);
1735 if (zfcp_qdio_sbal_get(qdio))
1736 goto out;
1737
1738 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1739 SBAL_SFLAGS0_TYPE_READ,
1740 qdio->adapter->pool.erp_req);
1741
1742 if (IS_ERR(req)) {
1743 retval = PTR_ERR(req);
1744 goto out;
1745 }
1746
1747 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1748 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1749
1750 req->data = erp_action->port;
1751 req->qtcb->header.port_handle = erp_action->port->handle;
1752 req->erp_action = erp_action;
1753 req->handler = zfcp_fsf_close_physical_port_handler;
1754 erp_action->fsf_req_id = req->req_id;
1755
1756 zfcp_fsf_start_erp_timer(req);
1757 retval = zfcp_fsf_req_send(req);
1758 if (retval) {
1759 zfcp_fsf_req_free(req);
1760 erp_action->fsf_req_id = 0;
1761 }
1762 out:
1763 spin_unlock_irq(&qdio->req_q_lock);
1764 return retval;
1765 }
1766
1767 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1768 {
1769 struct zfcp_adapter *adapter = req->adapter;
1770 struct scsi_device *sdev = req->data;
1771 struct zfcp_scsi_dev *zfcp_sdev;
1772 struct fsf_qtcb_header *header = &req->qtcb->header;
1773 union fsf_status_qual *qual = &header->fsf_status_qual;
1774
1775 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1776 return;
1777
1778 zfcp_sdev = sdev_to_zfcp(sdev);
1779
1780 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1781 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1782 &zfcp_sdev->status);
1783
1784 switch (header->fsf_status) {
1785
1786 case FSF_PORT_HANDLE_NOT_VALID:
1787 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1788 /* fall through */
1789 case FSF_LUN_ALREADY_OPEN:
1790 break;
1791 case FSF_PORT_BOXED:
1792 zfcp_erp_set_port_status(zfcp_sdev->port,
1793 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1794 zfcp_erp_port_reopen(zfcp_sdev->port,
1795 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1796 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1797 break;
1798 case FSF_LUN_SHARING_VIOLATION:
1799 if (qual->word[0])
1800 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1801 "LUN 0x%Lx on port 0x%Lx is already in "
1802 "use by CSS%d, MIF Image ID %x\n",
1803 zfcp_scsi_dev_lun(sdev),
1804 (unsigned long long)zfcp_sdev->port->wwpn,
1805 qual->fsf_queue_designator.cssid,
1806 qual->fsf_queue_designator.hla);
1807 zfcp_erp_set_lun_status(sdev,
1808 ZFCP_STATUS_COMMON_ERP_FAILED |
1809 ZFCP_STATUS_COMMON_ACCESS_DENIED);
1810 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1811 break;
1812 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1813 dev_warn(&adapter->ccw_device->dev,
1814 "No handle is available for LUN "
1815 "0x%016Lx on port 0x%016Lx\n",
1816 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1817 (unsigned long long)zfcp_sdev->port->wwpn);
1818 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1819 /* fall through */
1820 case FSF_INVALID_COMMAND_OPTION:
1821 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1822 break;
1823 case FSF_ADAPTER_STATUS_AVAILABLE:
1824 switch (header->fsf_status_qual.word[0]) {
1825 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1826 zfcp_fc_test_link(zfcp_sdev->port);
1827 /* fall through */
1828 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1829 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1830 break;
1831 }
1832 break;
1833
1834 case FSF_GOOD:
1835 zfcp_sdev->lun_handle = header->lun_handle;
1836 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1837 break;
1838 }
1839 }
1840
1841 /**
1842 * zfcp_fsf_open_lun - open LUN
1843 * @erp_action: pointer to struct zfcp_erp_action
1844 * Returns: 0 on success, error otherwise
1845 */
1846 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1847 {
1848 struct zfcp_adapter *adapter = erp_action->adapter;
1849 struct zfcp_qdio *qdio = adapter->qdio;
1850 struct zfcp_fsf_req *req;
1851 int retval = -EIO;
1852
1853 spin_lock_irq(&qdio->req_q_lock);
1854 if (zfcp_qdio_sbal_get(qdio))
1855 goto out;
1856
1857 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1858 SBAL_SFLAGS0_TYPE_READ,
1859 adapter->pool.erp_req);
1860
1861 if (IS_ERR(req)) {
1862 retval = PTR_ERR(req);
1863 goto out;
1864 }
1865
1866 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1867 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1868
1869 req->qtcb->header.port_handle = erp_action->port->handle;
1870 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1871 req->handler = zfcp_fsf_open_lun_handler;
1872 req->data = erp_action->sdev;
1873 req->erp_action = erp_action;
1874 erp_action->fsf_req_id = req->req_id;
1875
1876 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1877 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1878
1879 zfcp_fsf_start_erp_timer(req);
1880 retval = zfcp_fsf_req_send(req);
1881 if (retval) {
1882 zfcp_fsf_req_free(req);
1883 erp_action->fsf_req_id = 0;
1884 }
1885 out:
1886 spin_unlock_irq(&qdio->req_q_lock);
1887 return retval;
1888 }
1889
1890 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1891 {
1892 struct scsi_device *sdev = req->data;
1893 struct zfcp_scsi_dev *zfcp_sdev;
1894
1895 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1896 return;
1897
1898 zfcp_sdev = sdev_to_zfcp(sdev);
1899
1900 switch (req->qtcb->header.fsf_status) {
1901 case FSF_PORT_HANDLE_NOT_VALID:
1902 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904 break;
1905 case FSF_LUN_HANDLE_NOT_VALID:
1906 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 break;
1909 case FSF_PORT_BOXED:
1910 zfcp_erp_set_port_status(zfcp_sdev->port,
1911 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1912 zfcp_erp_port_reopen(zfcp_sdev->port,
1913 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1914 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915 break;
1916 case FSF_ADAPTER_STATUS_AVAILABLE:
1917 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1918 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1919 zfcp_fc_test_link(zfcp_sdev->port);
1920 /* fall through */
1921 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1922 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1923 break;
1924 }
1925 break;
1926 case FSF_GOOD:
1927 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1928 break;
1929 }
1930 }
1931
1932 /**
1933 * zfcp_fsf_close_LUN - close LUN
1934 * @erp_action: pointer to erp_action triggering the "close LUN"
1935 * Returns: 0 on success, error otherwise
1936 */
1937 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1938 {
1939 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1940 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1941 struct zfcp_fsf_req *req;
1942 int retval = -EIO;
1943
1944 spin_lock_irq(&qdio->req_q_lock);
1945 if (zfcp_qdio_sbal_get(qdio))
1946 goto out;
1947
1948 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1949 SBAL_SFLAGS0_TYPE_READ,
1950 qdio->adapter->pool.erp_req);
1951
1952 if (IS_ERR(req)) {
1953 retval = PTR_ERR(req);
1954 goto out;
1955 }
1956
1957 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1958 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1959
1960 req->qtcb->header.port_handle = erp_action->port->handle;
1961 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1962 req->handler = zfcp_fsf_close_lun_handler;
1963 req->data = erp_action->sdev;
1964 req->erp_action = erp_action;
1965 erp_action->fsf_req_id = req->req_id;
1966
1967 zfcp_fsf_start_erp_timer(req);
1968 retval = zfcp_fsf_req_send(req);
1969 if (retval) {
1970 zfcp_fsf_req_free(req);
1971 erp_action->fsf_req_id = 0;
1972 }
1973 out:
1974 spin_unlock_irq(&qdio->req_q_lock);
1975 return retval;
1976 }
1977
1978 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1979 {
1980 lat_rec->sum += lat;
1981 lat_rec->min = min(lat_rec->min, lat);
1982 lat_rec->max = max(lat_rec->max, lat);
1983 }
1984
1985 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1986 {
1987 struct fsf_qual_latency_info *lat_in;
1988 struct latency_cont *lat = NULL;
1989 struct zfcp_scsi_dev *zfcp_sdev;
1990 struct zfcp_blk_drv_data blktrc;
1991 int ticks = req->adapter->timer_ticks;
1992
1993 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1994
1995 blktrc.flags = 0;
1996 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1997 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1998 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1999 blktrc.inb_usage = 0;
2000 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2001
2002 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2003 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2004 zfcp_sdev = sdev_to_zfcp(scsi->device);
2005 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2006 blktrc.channel_lat = lat_in->channel_lat * ticks;
2007 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2008
2009 switch (req->qtcb->bottom.io.data_direction) {
2010 case FSF_DATADIR_DIF_READ_STRIP:
2011 case FSF_DATADIR_DIF_READ_CONVERT:
2012 case FSF_DATADIR_READ:
2013 lat = &zfcp_sdev->latencies.read;
2014 break;
2015 case FSF_DATADIR_DIF_WRITE_INSERT:
2016 case FSF_DATADIR_DIF_WRITE_CONVERT:
2017 case FSF_DATADIR_WRITE:
2018 lat = &zfcp_sdev->latencies.write;
2019 break;
2020 case FSF_DATADIR_CMND:
2021 lat = &zfcp_sdev->latencies.cmd;
2022 break;
2023 }
2024
2025 if (lat) {
2026 spin_lock(&zfcp_sdev->latencies.lock);
2027 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2028 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2029 lat->counter++;
2030 spin_unlock(&zfcp_sdev->latencies.lock);
2031 }
2032 }
2033
2034 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2035 sizeof(blktrc));
2036 }
2037
2038 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2039 {
2040 struct scsi_cmnd *scmnd = req->data;
2041 struct scsi_device *sdev = scmnd->device;
2042 struct zfcp_scsi_dev *zfcp_sdev;
2043 struct fsf_qtcb_header *header = &req->qtcb->header;
2044
2045 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2046 return;
2047
2048 zfcp_sdev = sdev_to_zfcp(sdev);
2049
2050 switch (header->fsf_status) {
2051 case FSF_HANDLE_MISMATCH:
2052 case FSF_PORT_HANDLE_NOT_VALID:
2053 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2054 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2055 break;
2056 case FSF_FCPLUN_NOT_VALID:
2057 case FSF_LUN_HANDLE_NOT_VALID:
2058 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2059 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060 break;
2061 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2062 zfcp_fsf_class_not_supp(req);
2063 break;
2064 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2065 dev_err(&req->adapter->ccw_device->dev,
2066 "Incorrect direction %d, LUN 0x%016Lx on port "
2067 "0x%016Lx closed\n",
2068 req->qtcb->bottom.io.data_direction,
2069 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2070 (unsigned long long)zfcp_sdev->port->wwpn);
2071 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2072 "fssfch3");
2073 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2074 break;
2075 case FSF_CMND_LENGTH_NOT_VALID:
2076 dev_err(&req->adapter->ccw_device->dev,
2077 "Incorrect CDB length %d, LUN 0x%016Lx on "
2078 "port 0x%016Lx closed\n",
2079 req->qtcb->bottom.io.fcp_cmnd_length,
2080 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2081 (unsigned long long)zfcp_sdev->port->wwpn);
2082 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2083 "fssfch4");
2084 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2085 break;
2086 case FSF_PORT_BOXED:
2087 zfcp_erp_set_port_status(zfcp_sdev->port,
2088 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2089 zfcp_erp_port_reopen(zfcp_sdev->port,
2090 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2091 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2092 break;
2093 case FSF_LUN_BOXED:
2094 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2095 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2096 "fssfch6");
2097 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2098 break;
2099 case FSF_ADAPTER_STATUS_AVAILABLE:
2100 if (header->fsf_status_qual.word[0] ==
2101 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2102 zfcp_fc_test_link(zfcp_sdev->port);
2103 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2104 break;
2105 }
2106 }
2107
2108 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2109 {
2110 struct scsi_cmnd *scpnt;
2111 struct fcp_resp_with_ext *fcp_rsp;
2112 unsigned long flags;
2113
2114 read_lock_irqsave(&req->adapter->abort_lock, flags);
2115
2116 scpnt = req->data;
2117 if (unlikely(!scpnt)) {
2118 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2119 return;
2120 }
2121
2122 zfcp_fsf_fcp_handler_common(req);
2123
2124 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2125 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2126 goto skip_fsfstatus;
2127 }
2128
2129 switch (req->qtcb->header.fsf_status) {
2130 case FSF_INCONSISTENT_PROT_DATA:
2131 case FSF_INVALID_PROT_PARM:
2132 set_host_byte(scpnt, DID_ERROR);
2133 goto skip_fsfstatus;
2134 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2135 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2136 goto skip_fsfstatus;
2137 case FSF_APP_TAG_CHECK_FAILURE:
2138 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2139 goto skip_fsfstatus;
2140 case FSF_REF_TAG_CHECK_FAILURE:
2141 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2142 goto skip_fsfstatus;
2143 }
2144 BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2145 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2146 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2147
2148 skip_fsfstatus:
2149 zfcp_fsf_req_trace(req, scpnt);
2150 zfcp_dbf_scsi_result(scpnt, req);
2151
2152 scpnt->host_scribble = NULL;
2153 (scpnt->scsi_done) (scpnt);
2154 /*
2155 * We must hold this lock until scsi_done has been called.
2156 * Otherwise we may call scsi_done after abort regarding this
2157 * command has completed.
2158 * Note: scsi_done must not block!
2159 */
2160 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2161 }
2162
2163 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2164 {
2165 switch (scsi_get_prot_op(scsi_cmnd)) {
2166 case SCSI_PROT_NORMAL:
2167 switch (scsi_cmnd->sc_data_direction) {
2168 case DMA_NONE:
2169 *data_dir = FSF_DATADIR_CMND;
2170 break;
2171 case DMA_FROM_DEVICE:
2172 *data_dir = FSF_DATADIR_READ;
2173 break;
2174 case DMA_TO_DEVICE:
2175 *data_dir = FSF_DATADIR_WRITE;
2176 break;
2177 case DMA_BIDIRECTIONAL:
2178 return -EINVAL;
2179 }
2180 break;
2181
2182 case SCSI_PROT_READ_STRIP:
2183 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2184 break;
2185 case SCSI_PROT_WRITE_INSERT:
2186 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2187 break;
2188 case SCSI_PROT_READ_PASS:
2189 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2190 break;
2191 case SCSI_PROT_WRITE_PASS:
2192 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2193 break;
2194 default:
2195 return -EINVAL;
2196 }
2197
2198 return 0;
2199 }
2200
2201 /**
2202 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2203 * @scsi_cmnd: scsi command to be sent
2204 */
2205 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2206 {
2207 struct zfcp_fsf_req *req;
2208 struct fcp_cmnd *fcp_cmnd;
2209 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2210 int retval = -EIO;
2211 struct scsi_device *sdev = scsi_cmnd->device;
2212 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2213 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2214 struct zfcp_qdio *qdio = adapter->qdio;
2215 struct fsf_qtcb_bottom_io *io;
2216 unsigned long flags;
2217
2218 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2219 ZFCP_STATUS_COMMON_UNBLOCKED)))
2220 return -EBUSY;
2221
2222 spin_lock_irqsave(&qdio->req_q_lock, flags);
2223 if (atomic_read(&qdio->req_q_free) <= 0) {
2224 atomic_inc(&qdio->req_q_full);
2225 goto out;
2226 }
2227
2228 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2229 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2230
2231 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2232 sbtype, adapter->pool.scsi_req);
2233
2234 if (IS_ERR(req)) {
2235 retval = PTR_ERR(req);
2236 goto out;
2237 }
2238
2239 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2240
2241 io = &req->qtcb->bottom.io;
2242 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2243 req->data = scsi_cmnd;
2244 req->handler = zfcp_fsf_fcp_cmnd_handler;
2245 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2246 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2247 io->service_class = FSF_CLASS_3;
2248 io->fcp_cmnd_length = FCP_CMND_LEN;
2249
2250 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2251 io->data_block_length = scsi_cmnd->device->sector_size;
2252 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2253 }
2254
2255 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2256 goto failed_scsi_cmnd;
2257
2258 BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2259 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2260 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2261
2262 if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2263 scsi_prot_sg_count(scsi_cmnd)) {
2264 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2265 scsi_prot_sg_count(scsi_cmnd));
2266 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2267 scsi_prot_sglist(scsi_cmnd));
2268 if (retval)
2269 goto failed_scsi_cmnd;
2270 io->prot_data_length = zfcp_qdio_real_bytes(
2271 scsi_prot_sglist(scsi_cmnd));
2272 }
2273
2274 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2275 scsi_sglist(scsi_cmnd));
2276 if (unlikely(retval))
2277 goto failed_scsi_cmnd;
2278
2279 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2280 if (zfcp_adapter_multi_buffer_active(adapter))
2281 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2282
2283 retval = zfcp_fsf_req_send(req);
2284 if (unlikely(retval))
2285 goto failed_scsi_cmnd;
2286
2287 goto out;
2288
2289 failed_scsi_cmnd:
2290 zfcp_fsf_req_free(req);
2291 scsi_cmnd->host_scribble = NULL;
2292 out:
2293 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2294 return retval;
2295 }
2296
2297 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2298 {
2299 struct fcp_resp_with_ext *fcp_rsp;
2300 struct fcp_resp_rsp_info *rsp_info;
2301
2302 zfcp_fsf_fcp_handler_common(req);
2303
2304 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2305 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2306
2307 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2308 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2309 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2310 }
2311
2312 /**
2313 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2314 * @scmnd: SCSI command to send the task management command for
2315 * @tm_flags: unsigned byte for task management flags
2316 * Returns: on success pointer to struct fsf_req, NULL otherwise
2317 */
2318 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2319 u8 tm_flags)
2320 {
2321 struct zfcp_fsf_req *req = NULL;
2322 struct fcp_cmnd *fcp_cmnd;
2323 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2324 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2325
2326 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2327 ZFCP_STATUS_COMMON_UNBLOCKED)))
2328 return NULL;
2329
2330 spin_lock_irq(&qdio->req_q_lock);
2331 if (zfcp_qdio_sbal_get(qdio))
2332 goto out;
2333
2334 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2335 SBAL_SFLAGS0_TYPE_WRITE,
2336 qdio->adapter->pool.scsi_req);
2337
2338 if (IS_ERR(req)) {
2339 req = NULL;
2340 goto out;
2341 }
2342
2343 req->data = scmnd;
2344 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2345 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2346 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2347 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2348 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2349 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2350
2351 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2352
2353 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2354 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2355
2356 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2357 if (!zfcp_fsf_req_send(req))
2358 goto out;
2359
2360 zfcp_fsf_req_free(req);
2361 req = NULL;
2362 out:
2363 spin_unlock_irq(&qdio->req_q_lock);
2364 return req;
2365 }
2366
2367 /**
2368 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2369 * @adapter: pointer to struct zfcp_adapter
2370 * @sbal_idx: response queue index of SBAL to be processed
2371 */
2372 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2373 {
2374 struct zfcp_adapter *adapter = qdio->adapter;
2375 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2376 struct qdio_buffer_element *sbale;
2377 struct zfcp_fsf_req *fsf_req;
2378 unsigned long req_id;
2379 int idx;
2380
2381 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2382
2383 sbale = &sbal->element[idx];
2384 req_id = (unsigned long) sbale->addr;
2385 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2386
2387 if (!fsf_req) {
2388 /*
2389 * Unknown request means that we have potentially memory
2390 * corruption and must stop the machine immediately.
2391 */
2392 zfcp_qdio_siosl(adapter);
2393 panic("error: unknown req_id (%lx) on adapter %s.\n",
2394 req_id, dev_name(&adapter->ccw_device->dev));
2395 }
2396
2397 zfcp_fsf_req_complete(fsf_req);
2398
2399 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2400 break;
2401 }
2402 }
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