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[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * zfcp device driver
4 *
5 * Implementation of FSF commands.
6 *
7 * Copyright IBM Corp. 2002, 2017
8 */
9
10 #define KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/blktrace_api.h>
14 #include <linux/slab.h>
15 #include <scsi/fc/fc_els.h>
16 #include "zfcp_ext.h"
17 #include "zfcp_fc.h"
18 #include "zfcp_dbf.h"
19 #include "zfcp_qdio.h"
20 #include "zfcp_reqlist.h"
21
22 struct kmem_cache *zfcp_fsf_qtcb_cache;
23
24 static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
25 {
26 struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
27 struct zfcp_adapter *adapter = fsf_req->adapter;
28
29 zfcp_qdio_siosl(adapter);
30 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
31 "fsrth_1");
32 }
33
34 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
35 unsigned long timeout)
36 {
37 fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_fsf_request_timeout_handler;
38 fsf_req->timer.expires = jiffies + timeout;
39 add_timer(&fsf_req->timer);
40 }
41
42 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
43 {
44 BUG_ON(!fsf_req->erp_action);
45 fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_erp_timeout_handler;
46 fsf_req->timer.expires = jiffies + 30 * HZ;
47 add_timer(&fsf_req->timer);
48 }
49
50 /* association between FSF command and FSF QTCB type */
51 static u32 fsf_qtcb_type[] = {
52 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
53 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
56 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
58 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
59 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
61 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
62 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
63 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
64 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
65 };
66
67 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
68 {
69 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
70 "operational because of an unsupported FC class\n");
71 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
72 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
73 }
74
75 /**
76 * zfcp_fsf_req_free - free memory used by fsf request
77 * @fsf_req: pointer to struct zfcp_fsf_req
78 */
79 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
80 {
81 if (likely(req->pool)) {
82 if (likely(req->qtcb))
83 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
84 mempool_free(req, req->pool);
85 return;
86 }
87
88 if (likely(req->qtcb))
89 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
90 kfree(req);
91 }
92
93 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
94 {
95 unsigned long flags;
96 struct fsf_status_read_buffer *sr_buf = req->data;
97 struct zfcp_adapter *adapter = req->adapter;
98 struct zfcp_port *port;
99 int d_id = ntoh24(sr_buf->d_id);
100
101 read_lock_irqsave(&adapter->port_list_lock, flags);
102 list_for_each_entry(port, &adapter->port_list, list)
103 if (port->d_id == d_id) {
104 zfcp_erp_port_reopen(port, 0, "fssrpc1");
105 break;
106 }
107 read_unlock_irqrestore(&adapter->port_list_lock, flags);
108 }
109
110 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
111 struct fsf_link_down_info *link_down)
112 {
113 struct zfcp_adapter *adapter = req->adapter;
114
115 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
116 return;
117
118 atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
119
120 zfcp_scsi_schedule_rports_block(adapter);
121
122 if (!link_down)
123 goto out;
124
125 switch (link_down->error_code) {
126 case FSF_PSQ_LINK_NO_LIGHT:
127 dev_warn(&req->adapter->ccw_device->dev,
128 "There is no light signal from the local "
129 "fibre channel cable\n");
130 break;
131 case FSF_PSQ_LINK_WRAP_PLUG:
132 dev_warn(&req->adapter->ccw_device->dev,
133 "There is a wrap plug instead of a fibre "
134 "channel cable\n");
135 break;
136 case FSF_PSQ_LINK_NO_FCP:
137 dev_warn(&req->adapter->ccw_device->dev,
138 "The adjacent fibre channel node does not "
139 "support FCP\n");
140 break;
141 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
142 dev_warn(&req->adapter->ccw_device->dev,
143 "The FCP device is suspended because of a "
144 "firmware update\n");
145 break;
146 case FSF_PSQ_LINK_INVALID_WWPN:
147 dev_warn(&req->adapter->ccw_device->dev,
148 "The FCP device detected a WWPN that is "
149 "duplicate or not valid\n");
150 break;
151 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
152 dev_warn(&req->adapter->ccw_device->dev,
153 "The fibre channel fabric does not support NPIV\n");
154 break;
155 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
156 dev_warn(&req->adapter->ccw_device->dev,
157 "The FCP adapter cannot support more NPIV ports\n");
158 break;
159 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
160 dev_warn(&req->adapter->ccw_device->dev,
161 "The adjacent switch cannot support "
162 "more NPIV ports\n");
163 break;
164 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
165 dev_warn(&req->adapter->ccw_device->dev,
166 "The FCP adapter could not log in to the "
167 "fibre channel fabric\n");
168 break;
169 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
170 dev_warn(&req->adapter->ccw_device->dev,
171 "The WWPN assignment file on the FCP adapter "
172 "has been damaged\n");
173 break;
174 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
175 dev_warn(&req->adapter->ccw_device->dev,
176 "The mode table on the FCP adapter "
177 "has been damaged\n");
178 break;
179 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
180 dev_warn(&req->adapter->ccw_device->dev,
181 "All NPIV ports on the FCP adapter have "
182 "been assigned\n");
183 break;
184 default:
185 dev_warn(&req->adapter->ccw_device->dev,
186 "The link between the FCP adapter and "
187 "the FC fabric is down\n");
188 }
189 out:
190 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
191 }
192
193 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
194 {
195 struct fsf_status_read_buffer *sr_buf = req->data;
196 struct fsf_link_down_info *ldi =
197 (struct fsf_link_down_info *) &sr_buf->payload;
198
199 switch (sr_buf->status_subtype) {
200 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
201 case FSF_STATUS_READ_SUB_FDISC_FAILED:
202 zfcp_fsf_link_down_info_eval(req, ldi);
203 break;
204 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
205 zfcp_fsf_link_down_info_eval(req, NULL);
206 }
207 }
208
209 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
210 {
211 struct zfcp_adapter *adapter = req->adapter;
212 struct fsf_status_read_buffer *sr_buf = req->data;
213
214 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
215 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
216 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
217 zfcp_fsf_req_free(req);
218 return;
219 }
220
221 zfcp_dbf_hba_fsf_uss("fssrh_4", req);
222
223 switch (sr_buf->status_type) {
224 case FSF_STATUS_READ_PORT_CLOSED:
225 zfcp_fsf_status_read_port_closed(req);
226 break;
227 case FSF_STATUS_READ_INCOMING_ELS:
228 zfcp_fc_incoming_els(req);
229 break;
230 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
231 break;
232 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
233 dev_warn(&adapter->ccw_device->dev,
234 "The error threshold for checksum statistics "
235 "has been exceeded\n");
236 zfcp_dbf_hba_bit_err("fssrh_3", req);
237 break;
238 case FSF_STATUS_READ_LINK_DOWN:
239 zfcp_fsf_status_read_link_down(req);
240 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
241 break;
242 case FSF_STATUS_READ_LINK_UP:
243 dev_info(&adapter->ccw_device->dev,
244 "The local link has been restored\n");
245 /* All ports should be marked as ready to run again */
246 zfcp_erp_set_adapter_status(adapter,
247 ZFCP_STATUS_COMMON_RUNNING);
248 zfcp_erp_adapter_reopen(adapter,
249 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
250 ZFCP_STATUS_COMMON_ERP_FAILED,
251 "fssrh_2");
252 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
253
254 break;
255 case FSF_STATUS_READ_NOTIFICATION_LOST:
256 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
257 zfcp_fc_conditional_port_scan(adapter);
258 break;
259 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
260 adapter->adapter_features = sr_buf->payload.word[0];
261 break;
262 }
263
264 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
265 zfcp_fsf_req_free(req);
266
267 atomic_inc(&adapter->stat_miss);
268 queue_work(adapter->work_queue, &adapter->stat_work);
269 }
270
271 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
272 {
273 switch (req->qtcb->header.fsf_status_qual.word[0]) {
274 case FSF_SQ_FCP_RSP_AVAILABLE:
275 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
276 case FSF_SQ_NO_RETRY_POSSIBLE:
277 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
278 return;
279 case FSF_SQ_COMMAND_ABORTED:
280 break;
281 case FSF_SQ_NO_RECOM:
282 dev_err(&req->adapter->ccw_device->dev,
283 "The FCP adapter reported a problem "
284 "that cannot be recovered\n");
285 zfcp_qdio_siosl(req->adapter);
286 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
287 break;
288 }
289 /* all non-return stats set FSFREQ_ERROR*/
290 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
291 }
292
293 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
294 {
295 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
296 return;
297
298 switch (req->qtcb->header.fsf_status) {
299 case FSF_UNKNOWN_COMMAND:
300 dev_err(&req->adapter->ccw_device->dev,
301 "The FCP adapter does not recognize the command 0x%x\n",
302 req->qtcb->header.fsf_command);
303 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
304 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
305 break;
306 case FSF_ADAPTER_STATUS_AVAILABLE:
307 zfcp_fsf_fsfstatus_qual_eval(req);
308 break;
309 }
310 }
311
312 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
313 {
314 struct zfcp_adapter *adapter = req->adapter;
315 struct fsf_qtcb *qtcb = req->qtcb;
316 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
317
318 zfcp_dbf_hba_fsf_response(req);
319
320 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
321 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
322 return;
323 }
324
325 switch (qtcb->prefix.prot_status) {
326 case FSF_PROT_GOOD:
327 case FSF_PROT_FSF_STATUS_PRESENTED:
328 return;
329 case FSF_PROT_QTCB_VERSION_ERROR:
330 dev_err(&adapter->ccw_device->dev,
331 "QTCB version 0x%x not supported by FCP adapter "
332 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
333 psq->word[0], psq->word[1]);
334 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
335 break;
336 case FSF_PROT_ERROR_STATE:
337 case FSF_PROT_SEQ_NUMB_ERROR:
338 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
339 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
340 break;
341 case FSF_PROT_UNSUPP_QTCB_TYPE:
342 dev_err(&adapter->ccw_device->dev,
343 "The QTCB type is not supported by the FCP adapter\n");
344 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
345 break;
346 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
347 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
348 &adapter->status);
349 break;
350 case FSF_PROT_DUPLICATE_REQUEST_ID:
351 dev_err(&adapter->ccw_device->dev,
352 "0x%Lx is an ambiguous request identifier\n",
353 (unsigned long long)qtcb->bottom.support.req_handle);
354 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
355 break;
356 case FSF_PROT_LINK_DOWN:
357 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
358 /* go through reopen to flush pending requests */
359 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
360 break;
361 case FSF_PROT_REEST_QUEUE:
362 /* All ports should be marked as ready to run again */
363 zfcp_erp_set_adapter_status(adapter,
364 ZFCP_STATUS_COMMON_RUNNING);
365 zfcp_erp_adapter_reopen(adapter,
366 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
367 ZFCP_STATUS_COMMON_ERP_FAILED,
368 "fspse_8");
369 break;
370 default:
371 dev_err(&adapter->ccw_device->dev,
372 "0x%x is not a valid transfer protocol status\n",
373 qtcb->prefix.prot_status);
374 zfcp_qdio_siosl(adapter);
375 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
376 }
377 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
378 }
379
380 /**
381 * zfcp_fsf_req_complete - process completion of a FSF request
382 * @fsf_req: The FSF request that has been completed.
383 *
384 * When a request has been completed either from the FCP adapter,
385 * or it has been dismissed due to a queue shutdown, this function
386 * is called to process the completion status and trigger further
387 * events related to the FSF request.
388 */
389 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
390 {
391 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
392 zfcp_fsf_status_read_handler(req);
393 return;
394 }
395
396 del_timer(&req->timer);
397 zfcp_fsf_protstatus_eval(req);
398 zfcp_fsf_fsfstatus_eval(req);
399 req->handler(req);
400
401 if (req->erp_action)
402 zfcp_erp_notify(req->erp_action, 0);
403
404 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
405 zfcp_fsf_req_free(req);
406 else
407 complete(&req->completion);
408 }
409
410 /**
411 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
412 * @adapter: pointer to struct zfcp_adapter
413 *
414 * Never ever call this without shutting down the adapter first.
415 * Otherwise the adapter would continue using and corrupting s390 storage.
416 * Included BUG_ON() call to ensure this is done.
417 * ERP is supposed to be the only user of this function.
418 */
419 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
420 {
421 struct zfcp_fsf_req *req, *tmp;
422 LIST_HEAD(remove_queue);
423
424 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
425 zfcp_reqlist_move(adapter->req_list, &remove_queue);
426
427 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
428 list_del(&req->list);
429 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
430 zfcp_fsf_req_complete(req);
431 }
432 }
433
434 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
435 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
436 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
437 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
438 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
439 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
440 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
441
442 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
443 {
444 u32 fdmi_speed = 0;
445 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
446 fdmi_speed |= FC_PORTSPEED_1GBIT;
447 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
448 fdmi_speed |= FC_PORTSPEED_2GBIT;
449 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
450 fdmi_speed |= FC_PORTSPEED_4GBIT;
451 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
452 fdmi_speed |= FC_PORTSPEED_10GBIT;
453 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
454 fdmi_speed |= FC_PORTSPEED_8GBIT;
455 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
456 fdmi_speed |= FC_PORTSPEED_16GBIT;
457 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
458 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
459 return fdmi_speed;
460 }
461
462 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
463 {
464 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
465 struct zfcp_adapter *adapter = req->adapter;
466 struct Scsi_Host *shost = adapter->scsi_host;
467 struct fc_els_flogi *nsp, *plogi;
468
469 /* adjust pointers for missing command code */
470 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
471 - sizeof(u32));
472 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
473 - sizeof(u32));
474
475 if (req->data)
476 memcpy(req->data, bottom, sizeof(*bottom));
477
478 fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
479 fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
480 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
481
482 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
483 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
484 (u16)FSF_STATUS_READS_RECOM);
485
486 if (fc_host_permanent_port_name(shost) == -1)
487 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
488
489 zfcp_scsi_set_prot(adapter);
490
491 /* no error return above here, otherwise must fix call chains */
492 /* do not evaluate invalid fields */
493 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
494 return 0;
495
496 fc_host_port_id(shost) = ntoh24(bottom->s_id);
497 fc_host_speed(shost) =
498 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
499
500 adapter->hydra_version = bottom->adapter_type;
501
502 switch (bottom->fc_topology) {
503 case FSF_TOPO_P2P:
504 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
505 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
506 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
507 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
508 break;
509 case FSF_TOPO_FABRIC:
510 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
511 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
512 else
513 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
514 break;
515 case FSF_TOPO_AL:
516 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
517 /* fall through */
518 default:
519 dev_err(&adapter->ccw_device->dev,
520 "Unknown or unsupported arbitrated loop "
521 "fibre channel topology detected\n");
522 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
523 return -EIO;
524 }
525
526 return 0;
527 }
528
529 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
530 {
531 struct zfcp_adapter *adapter = req->adapter;
532 struct fsf_qtcb *qtcb = req->qtcb;
533 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
534 struct Scsi_Host *shost = adapter->scsi_host;
535
536 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
537 return;
538
539 adapter->fsf_lic_version = bottom->lic_version;
540 adapter->adapter_features = bottom->adapter_features;
541 adapter->connection_features = bottom->connection_features;
542 adapter->peer_wwpn = 0;
543 adapter->peer_wwnn = 0;
544 adapter->peer_d_id = 0;
545
546 switch (qtcb->header.fsf_status) {
547 case FSF_GOOD:
548 if (zfcp_fsf_exchange_config_evaluate(req))
549 return;
550
551 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
552 dev_err(&adapter->ccw_device->dev,
553 "FCP adapter maximum QTCB size (%d bytes) "
554 "is too small\n",
555 bottom->max_qtcb_size);
556 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
557 return;
558 }
559 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
560 &adapter->status);
561 break;
562 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
563 fc_host_node_name(shost) = 0;
564 fc_host_port_name(shost) = 0;
565 fc_host_port_id(shost) = 0;
566 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
567 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
568 adapter->hydra_version = 0;
569
570 /* avoids adapter shutdown to be able to recognize
571 * events such as LINK UP */
572 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
573 &adapter->status);
574 zfcp_fsf_link_down_info_eval(req,
575 &qtcb->header.fsf_status_qual.link_down_info);
576 if (zfcp_fsf_exchange_config_evaluate(req))
577 return;
578 break;
579 default:
580 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
581 return;
582 }
583
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));
590 }
591
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, "fsecdh4");
597 return;
598 }
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, "fsecdh5");
604 }
605 }
606
607 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
608 {
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;
612
613 if (req->data)
614 memcpy(req->data, bottom, sizeof(*bottom));
615
616 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
617 fc_host_permanent_port_name(shost) = bottom->wwpn;
618 } else
619 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
620 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
621 fc_host_supported_speeds(shost) =
622 zfcp_fsf_convert_portspeed(bottom->supported_speed);
623 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
624 FC_FC4_LIST_SIZE);
625 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
626 FC_FC4_LIST_SIZE);
627 }
628
629 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
630 {
631 struct fsf_qtcb *qtcb = req->qtcb;
632
633 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
634 return;
635
636 switch (qtcb->header.fsf_status) {
637 case FSF_GOOD:
638 zfcp_fsf_exchange_port_evaluate(req);
639 break;
640 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
641 zfcp_fsf_exchange_port_evaluate(req);
642 zfcp_fsf_link_down_info_eval(req,
643 &qtcb->header.fsf_status_qual.link_down_info);
644 break;
645 }
646 }
647
648 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
649 {
650 struct zfcp_fsf_req *req;
651
652 if (likely(pool))
653 req = mempool_alloc(pool, GFP_ATOMIC);
654 else
655 req = kmalloc(sizeof(*req), GFP_ATOMIC);
656
657 if (unlikely(!req))
658 return NULL;
659
660 memset(req, 0, sizeof(*req));
661 req->pool = pool;
662 return req;
663 }
664
665 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
666 {
667 struct fsf_qtcb *qtcb;
668
669 if (likely(pool))
670 qtcb = mempool_alloc(pool, GFP_ATOMIC);
671 else
672 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
673
674 if (unlikely(!qtcb))
675 return NULL;
676
677 memset(qtcb, 0, sizeof(*qtcb));
678 return qtcb;
679 }
680
681 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
682 u32 fsf_cmd, u8 sbtype,
683 mempool_t *pool)
684 {
685 struct zfcp_adapter *adapter = qdio->adapter;
686 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
687
688 if (unlikely(!req))
689 return ERR_PTR(-ENOMEM);
690
691 if (adapter->req_no == 0)
692 adapter->req_no++;
693
694 INIT_LIST_HEAD(&req->list);
695 timer_setup(&req->timer, NULL, 0);
696 init_completion(&req->completion);
697
698 req->adapter = adapter;
699 req->fsf_command = fsf_cmd;
700 req->req_id = adapter->req_no;
701
702 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
703 if (likely(pool))
704 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
705 else
706 req->qtcb = zfcp_qtcb_alloc(NULL);
707
708 if (unlikely(!req->qtcb)) {
709 zfcp_fsf_req_free(req);
710 return ERR_PTR(-ENOMEM);
711 }
712
713 req->seq_no = adapter->fsf_req_seq_no;
714 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
715 req->qtcb->prefix.req_id = req->req_id;
716 req->qtcb->prefix.ulp_info = 26;
717 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
718 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
719 req->qtcb->header.req_handle = req->req_id;
720 req->qtcb->header.fsf_command = req->fsf_command;
721 }
722
723 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
724 req->qtcb, sizeof(struct fsf_qtcb));
725
726 return req;
727 }
728
729 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
730 {
731 struct zfcp_adapter *adapter = req->adapter;
732 struct zfcp_qdio *qdio = adapter->qdio;
733 int with_qtcb = (req->qtcb != NULL);
734 int req_id = req->req_id;
735
736 zfcp_reqlist_add(adapter->req_list, req);
737
738 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
739 req->issued = get_tod_clock();
740 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
741 del_timer(&req->timer);
742 /* lookup request again, list might have changed */
743 zfcp_reqlist_find_rm(adapter->req_list, req_id);
744 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
745 return -EIO;
746 }
747
748 /* Don't increase for unsolicited status */
749 if (with_qtcb)
750 adapter->fsf_req_seq_no++;
751 adapter->req_no++;
752
753 return 0;
754 }
755
756 /**
757 * zfcp_fsf_status_read - send status read request
758 * @adapter: pointer to struct zfcp_adapter
759 * @req_flags: request flags
760 * Returns: 0 on success, ERROR otherwise
761 */
762 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
763 {
764 struct zfcp_adapter *adapter = qdio->adapter;
765 struct zfcp_fsf_req *req;
766 struct fsf_status_read_buffer *sr_buf;
767 struct page *page;
768 int retval = -EIO;
769
770 spin_lock_irq(&qdio->req_q_lock);
771 if (zfcp_qdio_sbal_get(qdio))
772 goto out;
773
774 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
775 SBAL_SFLAGS0_TYPE_STATUS,
776 adapter->pool.status_read_req);
777 if (IS_ERR(req)) {
778 retval = PTR_ERR(req);
779 goto out;
780 }
781
782 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
783 if (!page) {
784 retval = -ENOMEM;
785 goto failed_buf;
786 }
787 sr_buf = page_address(page);
788 memset(sr_buf, 0, sizeof(*sr_buf));
789 req->data = sr_buf;
790
791 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
792 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
793
794 retval = zfcp_fsf_req_send(req);
795 if (retval)
796 goto failed_req_send;
797
798 goto out;
799
800 failed_req_send:
801 req->data = NULL;
802 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
803 failed_buf:
804 zfcp_dbf_hba_fsf_uss("fssr__1", req);
805 zfcp_fsf_req_free(req);
806 out:
807 spin_unlock_irq(&qdio->req_q_lock);
808 return retval;
809 }
810
811 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
812 {
813 struct scsi_device *sdev = req->data;
814 struct zfcp_scsi_dev *zfcp_sdev;
815 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
816
817 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
818 return;
819
820 zfcp_sdev = sdev_to_zfcp(sdev);
821
822 switch (req->qtcb->header.fsf_status) {
823 case FSF_PORT_HANDLE_NOT_VALID:
824 if (fsq->word[0] == fsq->word[1]) {
825 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
826 "fsafch1");
827 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
828 }
829 break;
830 case FSF_LUN_HANDLE_NOT_VALID:
831 if (fsq->word[0] == fsq->word[1]) {
832 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
833 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
834 }
835 break;
836 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
837 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
838 break;
839 case FSF_PORT_BOXED:
840 zfcp_erp_set_port_status(zfcp_sdev->port,
841 ZFCP_STATUS_COMMON_ACCESS_BOXED);
842 zfcp_erp_port_reopen(zfcp_sdev->port,
843 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
844 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
845 break;
846 case FSF_LUN_BOXED:
847 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
848 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
849 "fsafch4");
850 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
851 break;
852 case FSF_ADAPTER_STATUS_AVAILABLE:
853 switch (fsq->word[0]) {
854 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
855 zfcp_fc_test_link(zfcp_sdev->port);
856 /* fall through */
857 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
858 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
859 break;
860 }
861 break;
862 case FSF_GOOD:
863 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
864 break;
865 }
866 }
867
868 /**
869 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
870 * @scmnd: The SCSI command to abort
871 * Returns: pointer to struct zfcp_fsf_req
872 */
873
874 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
875 {
876 struct zfcp_fsf_req *req = NULL;
877 struct scsi_device *sdev = scmnd->device;
878 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
879 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
880 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
881
882 spin_lock_irq(&qdio->req_q_lock);
883 if (zfcp_qdio_sbal_get(qdio))
884 goto out;
885 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
886 SBAL_SFLAGS0_TYPE_READ,
887 qdio->adapter->pool.scsi_abort);
888 if (IS_ERR(req)) {
889 req = NULL;
890 goto out;
891 }
892
893 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
894 ZFCP_STATUS_COMMON_UNBLOCKED)))
895 goto out_error_free;
896
897 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
898
899 req->data = sdev;
900 req->handler = zfcp_fsf_abort_fcp_command_handler;
901 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
902 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
903 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
904
905 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
906 if (!zfcp_fsf_req_send(req))
907 goto out;
908
909 out_error_free:
910 zfcp_fsf_req_free(req);
911 req = NULL;
912 out:
913 spin_unlock_irq(&qdio->req_q_lock);
914 return req;
915 }
916
917 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
918 {
919 struct zfcp_adapter *adapter = req->adapter;
920 struct zfcp_fsf_ct_els *ct = req->data;
921 struct fsf_qtcb_header *header = &req->qtcb->header;
922
923 ct->status = -EINVAL;
924
925 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
926 goto skip_fsfstatus;
927
928 switch (header->fsf_status) {
929 case FSF_GOOD:
930 ct->status = 0;
931 zfcp_dbf_san_res("fsscth2", req);
932 break;
933 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
934 zfcp_fsf_class_not_supp(req);
935 break;
936 case FSF_ADAPTER_STATUS_AVAILABLE:
937 switch (header->fsf_status_qual.word[0]){
938 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
939 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
940 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
941 break;
942 }
943 break;
944 case FSF_PORT_BOXED:
945 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
946 break;
947 case FSF_PORT_HANDLE_NOT_VALID:
948 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
949 /* fall through */
950 case FSF_GENERIC_COMMAND_REJECTED:
951 case FSF_PAYLOAD_SIZE_MISMATCH:
952 case FSF_REQUEST_SIZE_TOO_LARGE:
953 case FSF_RESPONSE_SIZE_TOO_LARGE:
954 case FSF_SBAL_MISMATCH:
955 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
956 break;
957 }
958
959 skip_fsfstatus:
960 if (ct->handler)
961 ct->handler(ct->handler_data);
962 }
963
964 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
965 struct zfcp_qdio_req *q_req,
966 struct scatterlist *sg_req,
967 struct scatterlist *sg_resp)
968 {
969 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
970 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
971 zfcp_qdio_set_sbale_last(qdio, q_req);
972 }
973
974 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
975 struct scatterlist *sg_req,
976 struct scatterlist *sg_resp)
977 {
978 struct zfcp_adapter *adapter = req->adapter;
979 struct zfcp_qdio *qdio = adapter->qdio;
980 struct fsf_qtcb *qtcb = req->qtcb;
981 u32 feat = adapter->adapter_features;
982
983 if (zfcp_adapter_multi_buffer_active(adapter)) {
984 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
985 return -EIO;
986 qtcb->bottom.support.req_buf_length =
987 zfcp_qdio_real_bytes(sg_req);
988 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
989 return -EIO;
990 qtcb->bottom.support.resp_buf_length =
991 zfcp_qdio_real_bytes(sg_resp);
992
993 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
994 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
995 zfcp_qdio_set_scount(qdio, &req->qdio_req);
996 return 0;
997 }
998
999 /* use single, unchained SBAL if it can hold the request */
1000 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1001 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1002 sg_req, sg_resp);
1003 return 0;
1004 }
1005
1006 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1007 return -EOPNOTSUPP;
1008
1009 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1010 return -EIO;
1011
1012 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1013
1014 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1015 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1016
1017 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1018 return -EIO;
1019
1020 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1021
1022 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1023
1024 return 0;
1025 }
1026
1027 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1028 struct scatterlist *sg_req,
1029 struct scatterlist *sg_resp,
1030 unsigned int timeout)
1031 {
1032 int ret;
1033
1034 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1035 if (ret)
1036 return ret;
1037
1038 /* common settings for ct/gs and els requests */
1039 if (timeout > 255)
1040 timeout = 255; /* max value accepted by hardware */
1041 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1042 req->qtcb->bottom.support.timeout = timeout;
1043 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1044
1045 return 0;
1046 }
1047
1048 /**
1049 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1050 * @ct: pointer to struct zfcp_send_ct with data for request
1051 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1052 */
1053 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1054 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1055 unsigned int timeout)
1056 {
1057 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1058 struct zfcp_fsf_req *req;
1059 int ret = -EIO;
1060
1061 spin_lock_irq(&qdio->req_q_lock);
1062 if (zfcp_qdio_sbal_get(qdio))
1063 goto out;
1064
1065 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1066 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1067
1068 if (IS_ERR(req)) {
1069 ret = PTR_ERR(req);
1070 goto out;
1071 }
1072
1073 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1074 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1075 if (ret)
1076 goto failed_send;
1077
1078 req->handler = zfcp_fsf_send_ct_handler;
1079 req->qtcb->header.port_handle = wka_port->handle;
1080 ct->d_id = wka_port->d_id;
1081 req->data = ct;
1082
1083 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1084
1085 ret = zfcp_fsf_req_send(req);
1086 if (ret)
1087 goto failed_send;
1088
1089 goto out;
1090
1091 failed_send:
1092 zfcp_fsf_req_free(req);
1093 out:
1094 spin_unlock_irq(&qdio->req_q_lock);
1095 return ret;
1096 }
1097
1098 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1099 {
1100 struct zfcp_fsf_ct_els *send_els = req->data;
1101 struct fsf_qtcb_header *header = &req->qtcb->header;
1102
1103 send_els->status = -EINVAL;
1104
1105 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1106 goto skip_fsfstatus;
1107
1108 switch (header->fsf_status) {
1109 case FSF_GOOD:
1110 send_els->status = 0;
1111 zfcp_dbf_san_res("fsselh1", req);
1112 break;
1113 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1114 zfcp_fsf_class_not_supp(req);
1115 break;
1116 case FSF_ADAPTER_STATUS_AVAILABLE:
1117 switch (header->fsf_status_qual.word[0]){
1118 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1119 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1120 case FSF_SQ_RETRY_IF_POSSIBLE:
1121 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1122 break;
1123 }
1124 break;
1125 case FSF_ELS_COMMAND_REJECTED:
1126 case FSF_PAYLOAD_SIZE_MISMATCH:
1127 case FSF_REQUEST_SIZE_TOO_LARGE:
1128 case FSF_RESPONSE_SIZE_TOO_LARGE:
1129 break;
1130 case FSF_SBAL_MISMATCH:
1131 /* should never occur, avoided in zfcp_fsf_send_els */
1132 /* fall through */
1133 default:
1134 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1135 break;
1136 }
1137 skip_fsfstatus:
1138 if (send_els->handler)
1139 send_els->handler(send_els->handler_data);
1140 }
1141
1142 /**
1143 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1144 * @els: pointer to struct zfcp_send_els with data for the command
1145 */
1146 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1147 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1148 {
1149 struct zfcp_fsf_req *req;
1150 struct zfcp_qdio *qdio = adapter->qdio;
1151 int ret = -EIO;
1152
1153 spin_lock_irq(&qdio->req_q_lock);
1154 if (zfcp_qdio_sbal_get(qdio))
1155 goto out;
1156
1157 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1158 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1159
1160 if (IS_ERR(req)) {
1161 ret = PTR_ERR(req);
1162 goto out;
1163 }
1164
1165 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1166
1167 if (!zfcp_adapter_multi_buffer_active(adapter))
1168 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1169
1170 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1171
1172 if (ret)
1173 goto failed_send;
1174
1175 hton24(req->qtcb->bottom.support.d_id, d_id);
1176 req->handler = zfcp_fsf_send_els_handler;
1177 els->d_id = d_id;
1178 req->data = els;
1179
1180 zfcp_dbf_san_req("fssels1", req, d_id);
1181
1182 ret = zfcp_fsf_req_send(req);
1183 if (ret)
1184 goto failed_send;
1185
1186 goto out;
1187
1188 failed_send:
1189 zfcp_fsf_req_free(req);
1190 out:
1191 spin_unlock_irq(&qdio->req_q_lock);
1192 return ret;
1193 }
1194
1195 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1196 {
1197 struct zfcp_fsf_req *req;
1198 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1199 int retval = -EIO;
1200
1201 spin_lock_irq(&qdio->req_q_lock);
1202 if (zfcp_qdio_sbal_get(qdio))
1203 goto out;
1204
1205 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1206 SBAL_SFLAGS0_TYPE_READ,
1207 qdio->adapter->pool.erp_req);
1208
1209 if (IS_ERR(req)) {
1210 retval = PTR_ERR(req);
1211 goto out;
1212 }
1213
1214 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1215 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1216
1217 req->qtcb->bottom.config.feature_selection =
1218 FSF_FEATURE_NOTIFICATION_LOST |
1219 FSF_FEATURE_UPDATE_ALERT;
1220 req->erp_action = erp_action;
1221 req->handler = zfcp_fsf_exchange_config_data_handler;
1222 erp_action->fsf_req_id = req->req_id;
1223
1224 zfcp_fsf_start_erp_timer(req);
1225 retval = zfcp_fsf_req_send(req);
1226 if (retval) {
1227 zfcp_fsf_req_free(req);
1228 erp_action->fsf_req_id = 0;
1229 }
1230 out:
1231 spin_unlock_irq(&qdio->req_q_lock);
1232 return retval;
1233 }
1234
1235 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1236 struct fsf_qtcb_bottom_config *data)
1237 {
1238 struct zfcp_fsf_req *req = NULL;
1239 int retval = -EIO;
1240
1241 spin_lock_irq(&qdio->req_q_lock);
1242 if (zfcp_qdio_sbal_get(qdio))
1243 goto out_unlock;
1244
1245 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1246 SBAL_SFLAGS0_TYPE_READ, NULL);
1247
1248 if (IS_ERR(req)) {
1249 retval = PTR_ERR(req);
1250 goto out_unlock;
1251 }
1252
1253 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1254 req->handler = zfcp_fsf_exchange_config_data_handler;
1255
1256 req->qtcb->bottom.config.feature_selection =
1257 FSF_FEATURE_NOTIFICATION_LOST |
1258 FSF_FEATURE_UPDATE_ALERT;
1259
1260 if (data)
1261 req->data = data;
1262
1263 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1264 retval = zfcp_fsf_req_send(req);
1265 spin_unlock_irq(&qdio->req_q_lock);
1266 if (!retval)
1267 wait_for_completion(&req->completion);
1268
1269 zfcp_fsf_req_free(req);
1270 return retval;
1271
1272 out_unlock:
1273 spin_unlock_irq(&qdio->req_q_lock);
1274 return retval;
1275 }
1276
1277 /**
1278 * zfcp_fsf_exchange_port_data - request information about local port
1279 * @erp_action: ERP action for the adapter for which port data is requested
1280 * Returns: 0 on success, error otherwise
1281 */
1282 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1283 {
1284 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1285 struct zfcp_fsf_req *req;
1286 int retval = -EIO;
1287
1288 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1289 return -EOPNOTSUPP;
1290
1291 spin_lock_irq(&qdio->req_q_lock);
1292 if (zfcp_qdio_sbal_get(qdio))
1293 goto out;
1294
1295 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1296 SBAL_SFLAGS0_TYPE_READ,
1297 qdio->adapter->pool.erp_req);
1298
1299 if (IS_ERR(req)) {
1300 retval = PTR_ERR(req);
1301 goto out;
1302 }
1303
1304 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1305 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1306
1307 req->handler = zfcp_fsf_exchange_port_data_handler;
1308 req->erp_action = erp_action;
1309 erp_action->fsf_req_id = req->req_id;
1310
1311 zfcp_fsf_start_erp_timer(req);
1312 retval = zfcp_fsf_req_send(req);
1313 if (retval) {
1314 zfcp_fsf_req_free(req);
1315 erp_action->fsf_req_id = 0;
1316 }
1317 out:
1318 spin_unlock_irq(&qdio->req_q_lock);
1319 return retval;
1320 }
1321
1322 /**
1323 * zfcp_fsf_exchange_port_data_sync - request information about local port
1324 * @qdio: pointer to struct zfcp_qdio
1325 * @data: pointer to struct fsf_qtcb_bottom_port
1326 * Returns: 0 on success, error otherwise
1327 */
1328 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1329 struct fsf_qtcb_bottom_port *data)
1330 {
1331 struct zfcp_fsf_req *req = NULL;
1332 int retval = -EIO;
1333
1334 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1335 return -EOPNOTSUPP;
1336
1337 spin_lock_irq(&qdio->req_q_lock);
1338 if (zfcp_qdio_sbal_get(qdio))
1339 goto out_unlock;
1340
1341 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1342 SBAL_SFLAGS0_TYPE_READ, NULL);
1343
1344 if (IS_ERR(req)) {
1345 retval = PTR_ERR(req);
1346 goto out_unlock;
1347 }
1348
1349 if (data)
1350 req->data = data;
1351
1352 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1353
1354 req->handler = zfcp_fsf_exchange_port_data_handler;
1355 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1356 retval = zfcp_fsf_req_send(req);
1357 spin_unlock_irq(&qdio->req_q_lock);
1358
1359 if (!retval)
1360 wait_for_completion(&req->completion);
1361
1362 zfcp_fsf_req_free(req);
1363
1364 return retval;
1365
1366 out_unlock:
1367 spin_unlock_irq(&qdio->req_q_lock);
1368 return retval;
1369 }
1370
1371 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1372 {
1373 struct zfcp_port *port = req->data;
1374 struct fsf_qtcb_header *header = &req->qtcb->header;
1375 struct fc_els_flogi *plogi;
1376
1377 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1378 goto out;
1379
1380 switch (header->fsf_status) {
1381 case FSF_PORT_ALREADY_OPEN:
1382 break;
1383 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1384 dev_warn(&req->adapter->ccw_device->dev,
1385 "Not enough FCP adapter resources to open "
1386 "remote port 0x%016Lx\n",
1387 (unsigned long long)port->wwpn);
1388 zfcp_erp_set_port_status(port,
1389 ZFCP_STATUS_COMMON_ERP_FAILED);
1390 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1391 break;
1392 case FSF_ADAPTER_STATUS_AVAILABLE:
1393 switch (header->fsf_status_qual.word[0]) {
1394 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1395 /* no zfcp_fc_test_link() with failed open port */
1396 /* fall through */
1397 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1398 case FSF_SQ_NO_RETRY_POSSIBLE:
1399 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1400 break;
1401 }
1402 break;
1403 case FSF_GOOD:
1404 port->handle = header->port_handle;
1405 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1406 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1407 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1408 &port->status);
1409 /* check whether D_ID has changed during open */
1410 /*
1411 * FIXME: This check is not airtight, as the FCP channel does
1412 * not monitor closures of target port connections caused on
1413 * the remote side. Thus, they might miss out on invalidating
1414 * locally cached WWPNs (and other N_Port parameters) of gone
1415 * target ports. So, our heroic attempt to make things safe
1416 * could be undermined by 'open port' response data tagged with
1417 * obsolete WWPNs. Another reason to monitor potential
1418 * connection closures ourself at least (by interpreting
1419 * incoming ELS' and unsolicited status). It just crosses my
1420 * mind that one should be able to cross-check by means of
1421 * another GID_PN straight after a port has been opened.
1422 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1423 */
1424 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1425 if (req->qtcb->bottom.support.els1_length >=
1426 FSF_PLOGI_MIN_LEN)
1427 zfcp_fc_plogi_evaluate(port, plogi);
1428 break;
1429 case FSF_UNKNOWN_OP_SUBTYPE:
1430 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1431 break;
1432 }
1433
1434 out:
1435 put_device(&port->dev);
1436 }
1437
1438 /**
1439 * zfcp_fsf_open_port - create and send open port request
1440 * @erp_action: pointer to struct zfcp_erp_action
1441 * Returns: 0 on success, error otherwise
1442 */
1443 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1444 {
1445 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1446 struct zfcp_port *port = erp_action->port;
1447 struct zfcp_fsf_req *req;
1448 int retval = -EIO;
1449
1450 spin_lock_irq(&qdio->req_q_lock);
1451 if (zfcp_qdio_sbal_get(qdio))
1452 goto out;
1453
1454 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1455 SBAL_SFLAGS0_TYPE_READ,
1456 qdio->adapter->pool.erp_req);
1457
1458 if (IS_ERR(req)) {
1459 retval = PTR_ERR(req);
1460 goto out;
1461 }
1462
1463 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1464 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1465
1466 req->handler = zfcp_fsf_open_port_handler;
1467 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1468 req->data = port;
1469 req->erp_action = erp_action;
1470 erp_action->fsf_req_id = req->req_id;
1471 get_device(&port->dev);
1472
1473 zfcp_fsf_start_erp_timer(req);
1474 retval = zfcp_fsf_req_send(req);
1475 if (retval) {
1476 zfcp_fsf_req_free(req);
1477 erp_action->fsf_req_id = 0;
1478 put_device(&port->dev);
1479 }
1480 out:
1481 spin_unlock_irq(&qdio->req_q_lock);
1482 return retval;
1483 }
1484
1485 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1486 {
1487 struct zfcp_port *port = req->data;
1488
1489 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1490 return;
1491
1492 switch (req->qtcb->header.fsf_status) {
1493 case FSF_PORT_HANDLE_NOT_VALID:
1494 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1495 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1496 break;
1497 case FSF_ADAPTER_STATUS_AVAILABLE:
1498 break;
1499 case FSF_GOOD:
1500 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1501 break;
1502 }
1503 }
1504
1505 /**
1506 * zfcp_fsf_close_port - create and send close port request
1507 * @erp_action: pointer to struct zfcp_erp_action
1508 * Returns: 0 on success, error otherwise
1509 */
1510 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1511 {
1512 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1513 struct zfcp_fsf_req *req;
1514 int retval = -EIO;
1515
1516 spin_lock_irq(&qdio->req_q_lock);
1517 if (zfcp_qdio_sbal_get(qdio))
1518 goto out;
1519
1520 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1521 SBAL_SFLAGS0_TYPE_READ,
1522 qdio->adapter->pool.erp_req);
1523
1524 if (IS_ERR(req)) {
1525 retval = PTR_ERR(req);
1526 goto out;
1527 }
1528
1529 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1530 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1531
1532 req->handler = zfcp_fsf_close_port_handler;
1533 req->data = erp_action->port;
1534 req->erp_action = erp_action;
1535 req->qtcb->header.port_handle = erp_action->port->handle;
1536 erp_action->fsf_req_id = req->req_id;
1537
1538 zfcp_fsf_start_erp_timer(req);
1539 retval = zfcp_fsf_req_send(req);
1540 if (retval) {
1541 zfcp_fsf_req_free(req);
1542 erp_action->fsf_req_id = 0;
1543 }
1544 out:
1545 spin_unlock_irq(&qdio->req_q_lock);
1546 return retval;
1547 }
1548
1549 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1550 {
1551 struct zfcp_fc_wka_port *wka_port = req->data;
1552 struct fsf_qtcb_header *header = &req->qtcb->header;
1553
1554 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1555 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1556 goto out;
1557 }
1558
1559 switch (header->fsf_status) {
1560 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1561 dev_warn(&req->adapter->ccw_device->dev,
1562 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1563 /* fall through */
1564 case FSF_ADAPTER_STATUS_AVAILABLE:
1565 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1566 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1567 break;
1568 case FSF_GOOD:
1569 wka_port->handle = header->port_handle;
1570 /* fall through */
1571 case FSF_PORT_ALREADY_OPEN:
1572 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1573 }
1574 out:
1575 wake_up(&wka_port->completion_wq);
1576 }
1577
1578 /**
1579 * zfcp_fsf_open_wka_port - create and send open wka-port request
1580 * @wka_port: pointer to struct zfcp_fc_wka_port
1581 * Returns: 0 on success, error otherwise
1582 */
1583 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1584 {
1585 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1586 struct zfcp_fsf_req *req;
1587 int retval = -EIO;
1588
1589 spin_lock_irq(&qdio->req_q_lock);
1590 if (zfcp_qdio_sbal_get(qdio))
1591 goto out;
1592
1593 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1594 SBAL_SFLAGS0_TYPE_READ,
1595 qdio->adapter->pool.erp_req);
1596
1597 if (IS_ERR(req)) {
1598 retval = PTR_ERR(req);
1599 goto out;
1600 }
1601
1602 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1603 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1604
1605 req->handler = zfcp_fsf_open_wka_port_handler;
1606 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1607 req->data = wka_port;
1608
1609 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1610 retval = zfcp_fsf_req_send(req);
1611 if (retval)
1612 zfcp_fsf_req_free(req);
1613 out:
1614 spin_unlock_irq(&qdio->req_q_lock);
1615 if (!retval)
1616 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1617 return retval;
1618 }
1619
1620 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1621 {
1622 struct zfcp_fc_wka_port *wka_port = req->data;
1623
1624 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1625 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1626 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1627 }
1628
1629 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1630 wake_up(&wka_port->completion_wq);
1631 }
1632
1633 /**
1634 * zfcp_fsf_close_wka_port - create and send close wka port request
1635 * @wka_port: WKA port to open
1636 * Returns: 0 on success, error otherwise
1637 */
1638 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1639 {
1640 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1641 struct zfcp_fsf_req *req;
1642 int retval = -EIO;
1643
1644 spin_lock_irq(&qdio->req_q_lock);
1645 if (zfcp_qdio_sbal_get(qdio))
1646 goto out;
1647
1648 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1649 SBAL_SFLAGS0_TYPE_READ,
1650 qdio->adapter->pool.erp_req);
1651
1652 if (IS_ERR(req)) {
1653 retval = PTR_ERR(req);
1654 goto out;
1655 }
1656
1657 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1658 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1659
1660 req->handler = zfcp_fsf_close_wka_port_handler;
1661 req->data = wka_port;
1662 req->qtcb->header.port_handle = wka_port->handle;
1663
1664 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1665 retval = zfcp_fsf_req_send(req);
1666 if (retval)
1667 zfcp_fsf_req_free(req);
1668 out:
1669 spin_unlock_irq(&qdio->req_q_lock);
1670 if (!retval)
1671 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1672 return retval;
1673 }
1674
1675 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1676 {
1677 struct zfcp_port *port = req->data;
1678 struct fsf_qtcb_header *header = &req->qtcb->header;
1679 struct scsi_device *sdev;
1680
1681 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1682 return;
1683
1684 switch (header->fsf_status) {
1685 case FSF_PORT_HANDLE_NOT_VALID:
1686 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1687 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1688 break;
1689 case FSF_PORT_BOXED:
1690 /* can't use generic zfcp_erp_modify_port_status because
1691 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1692 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1693 shost_for_each_device(sdev, port->adapter->scsi_host)
1694 if (sdev_to_zfcp(sdev)->port == port)
1695 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1696 &sdev_to_zfcp(sdev)->status);
1697 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1698 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1699 "fscpph2");
1700 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1701 break;
1702 case FSF_ADAPTER_STATUS_AVAILABLE:
1703 switch (header->fsf_status_qual.word[0]) {
1704 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1705 /* fall through */
1706 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1707 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1708 break;
1709 }
1710 break;
1711 case FSF_GOOD:
1712 /* can't use generic zfcp_erp_modify_port_status because
1713 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1714 */
1715 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1716 shost_for_each_device(sdev, port->adapter->scsi_host)
1717 if (sdev_to_zfcp(sdev)->port == port)
1718 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1719 &sdev_to_zfcp(sdev)->status);
1720 break;
1721 }
1722 }
1723
1724 /**
1725 * zfcp_fsf_close_physical_port - close physical port
1726 * @erp_action: pointer to struct zfcp_erp_action
1727 * Returns: 0 on success
1728 */
1729 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1730 {
1731 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1732 struct zfcp_fsf_req *req;
1733 int retval = -EIO;
1734
1735 spin_lock_irq(&qdio->req_q_lock);
1736 if (zfcp_qdio_sbal_get(qdio))
1737 goto out;
1738
1739 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1740 SBAL_SFLAGS0_TYPE_READ,
1741 qdio->adapter->pool.erp_req);
1742
1743 if (IS_ERR(req)) {
1744 retval = PTR_ERR(req);
1745 goto out;
1746 }
1747
1748 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1749 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1750
1751 req->data = erp_action->port;
1752 req->qtcb->header.port_handle = erp_action->port->handle;
1753 req->erp_action = erp_action;
1754 req->handler = zfcp_fsf_close_physical_port_handler;
1755 erp_action->fsf_req_id = req->req_id;
1756
1757 zfcp_fsf_start_erp_timer(req);
1758 retval = zfcp_fsf_req_send(req);
1759 if (retval) {
1760 zfcp_fsf_req_free(req);
1761 erp_action->fsf_req_id = 0;
1762 }
1763 out:
1764 spin_unlock_irq(&qdio->req_q_lock);
1765 return retval;
1766 }
1767
1768 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1769 {
1770 struct zfcp_adapter *adapter = req->adapter;
1771 struct scsi_device *sdev = req->data;
1772 struct zfcp_scsi_dev *zfcp_sdev;
1773 struct fsf_qtcb_header *header = &req->qtcb->header;
1774 union fsf_status_qual *qual = &header->fsf_status_qual;
1775
1776 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1777 return;
1778
1779 zfcp_sdev = sdev_to_zfcp(sdev);
1780
1781 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1782 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1783 &zfcp_sdev->status);
1784
1785 switch (header->fsf_status) {
1786
1787 case FSF_PORT_HANDLE_NOT_VALID:
1788 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1789 /* fall through */
1790 case FSF_LUN_ALREADY_OPEN:
1791 break;
1792 case FSF_PORT_BOXED:
1793 zfcp_erp_set_port_status(zfcp_sdev->port,
1794 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1795 zfcp_erp_port_reopen(zfcp_sdev->port,
1796 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1797 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1798 break;
1799 case FSF_LUN_SHARING_VIOLATION:
1800 if (qual->word[0])
1801 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1802 "LUN 0x%Lx on port 0x%Lx is already in "
1803 "use by CSS%d, MIF Image ID %x\n",
1804 zfcp_scsi_dev_lun(sdev),
1805 (unsigned long long)zfcp_sdev->port->wwpn,
1806 qual->fsf_queue_designator.cssid,
1807 qual->fsf_queue_designator.hla);
1808 zfcp_erp_set_lun_status(sdev,
1809 ZFCP_STATUS_COMMON_ERP_FAILED |
1810 ZFCP_STATUS_COMMON_ACCESS_DENIED);
1811 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812 break;
1813 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1814 dev_warn(&adapter->ccw_device->dev,
1815 "No handle is available for LUN "
1816 "0x%016Lx on port 0x%016Lx\n",
1817 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1818 (unsigned long long)zfcp_sdev->port->wwpn);
1819 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1820 /* fall through */
1821 case FSF_INVALID_COMMAND_OPTION:
1822 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1823 break;
1824 case FSF_ADAPTER_STATUS_AVAILABLE:
1825 switch (header->fsf_status_qual.word[0]) {
1826 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1827 zfcp_fc_test_link(zfcp_sdev->port);
1828 /* fall through */
1829 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1830 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1831 break;
1832 }
1833 break;
1834
1835 case FSF_GOOD:
1836 zfcp_sdev->lun_handle = header->lun_handle;
1837 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1838 break;
1839 }
1840 }
1841
1842 /**
1843 * zfcp_fsf_open_lun - open LUN
1844 * @erp_action: pointer to struct zfcp_erp_action
1845 * Returns: 0 on success, error otherwise
1846 */
1847 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1848 {
1849 struct zfcp_adapter *adapter = erp_action->adapter;
1850 struct zfcp_qdio *qdio = adapter->qdio;
1851 struct zfcp_fsf_req *req;
1852 int retval = -EIO;
1853
1854 spin_lock_irq(&qdio->req_q_lock);
1855 if (zfcp_qdio_sbal_get(qdio))
1856 goto out;
1857
1858 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1859 SBAL_SFLAGS0_TYPE_READ,
1860 adapter->pool.erp_req);
1861
1862 if (IS_ERR(req)) {
1863 retval = PTR_ERR(req);
1864 goto out;
1865 }
1866
1867 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1868 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1869
1870 req->qtcb->header.port_handle = erp_action->port->handle;
1871 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1872 req->handler = zfcp_fsf_open_lun_handler;
1873 req->data = erp_action->sdev;
1874 req->erp_action = erp_action;
1875 erp_action->fsf_req_id = req->req_id;
1876
1877 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1878 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1879
1880 zfcp_fsf_start_erp_timer(req);
1881 retval = zfcp_fsf_req_send(req);
1882 if (retval) {
1883 zfcp_fsf_req_free(req);
1884 erp_action->fsf_req_id = 0;
1885 }
1886 out:
1887 spin_unlock_irq(&qdio->req_q_lock);
1888 return retval;
1889 }
1890
1891 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1892 {
1893 struct scsi_device *sdev = req->data;
1894 struct zfcp_scsi_dev *zfcp_sdev;
1895
1896 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1897 return;
1898
1899 zfcp_sdev = sdev_to_zfcp(sdev);
1900
1901 switch (req->qtcb->header.fsf_status) {
1902 case FSF_PORT_HANDLE_NOT_VALID:
1903 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1904 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1905 break;
1906 case FSF_LUN_HANDLE_NOT_VALID:
1907 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1908 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1909 break;
1910 case FSF_PORT_BOXED:
1911 zfcp_erp_set_port_status(zfcp_sdev->port,
1912 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1913 zfcp_erp_port_reopen(zfcp_sdev->port,
1914 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1915 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1916 break;
1917 case FSF_ADAPTER_STATUS_AVAILABLE:
1918 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1919 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1920 zfcp_fc_test_link(zfcp_sdev->port);
1921 /* fall through */
1922 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1923 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1924 break;
1925 }
1926 break;
1927 case FSF_GOOD:
1928 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1929 break;
1930 }
1931 }
1932
1933 /**
1934 * zfcp_fsf_close_LUN - close LUN
1935 * @erp_action: pointer to erp_action triggering the "close LUN"
1936 * Returns: 0 on success, error otherwise
1937 */
1938 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1939 {
1940 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1941 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1942 struct zfcp_fsf_req *req;
1943 int retval = -EIO;
1944
1945 spin_lock_irq(&qdio->req_q_lock);
1946 if (zfcp_qdio_sbal_get(qdio))
1947 goto out;
1948
1949 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1950 SBAL_SFLAGS0_TYPE_READ,
1951 qdio->adapter->pool.erp_req);
1952
1953 if (IS_ERR(req)) {
1954 retval = PTR_ERR(req);
1955 goto out;
1956 }
1957
1958 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1959 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1960
1961 req->qtcb->header.port_handle = erp_action->port->handle;
1962 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1963 req->handler = zfcp_fsf_close_lun_handler;
1964 req->data = erp_action->sdev;
1965 req->erp_action = erp_action;
1966 erp_action->fsf_req_id = req->req_id;
1967
1968 zfcp_fsf_start_erp_timer(req);
1969 retval = zfcp_fsf_req_send(req);
1970 if (retval) {
1971 zfcp_fsf_req_free(req);
1972 erp_action->fsf_req_id = 0;
1973 }
1974 out:
1975 spin_unlock_irq(&qdio->req_q_lock);
1976 return retval;
1977 }
1978
1979 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1980 {
1981 lat_rec->sum += lat;
1982 lat_rec->min = min(lat_rec->min, lat);
1983 lat_rec->max = max(lat_rec->max, lat);
1984 }
1985
1986 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1987 {
1988 struct fsf_qual_latency_info *lat_in;
1989 struct latency_cont *lat = NULL;
1990 struct zfcp_scsi_dev *zfcp_sdev;
1991 struct zfcp_blk_drv_data blktrc;
1992 int ticks = req->adapter->timer_ticks;
1993
1994 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1995
1996 blktrc.flags = 0;
1997 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1998 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1999 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2000 blktrc.inb_usage = 0;
2001 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2002
2003 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2004 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2005 zfcp_sdev = sdev_to_zfcp(scsi->device);
2006 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2007 blktrc.channel_lat = lat_in->channel_lat * ticks;
2008 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2009
2010 switch (req->qtcb->bottom.io.data_direction) {
2011 case FSF_DATADIR_DIF_READ_STRIP:
2012 case FSF_DATADIR_DIF_READ_CONVERT:
2013 case FSF_DATADIR_READ:
2014 lat = &zfcp_sdev->latencies.read;
2015 break;
2016 case FSF_DATADIR_DIF_WRITE_INSERT:
2017 case FSF_DATADIR_DIF_WRITE_CONVERT:
2018 case FSF_DATADIR_WRITE:
2019 lat = &zfcp_sdev->latencies.write;
2020 break;
2021 case FSF_DATADIR_CMND:
2022 lat = &zfcp_sdev->latencies.cmd;
2023 break;
2024 }
2025
2026 if (lat) {
2027 spin_lock(&zfcp_sdev->latencies.lock);
2028 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2029 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2030 lat->counter++;
2031 spin_unlock(&zfcp_sdev->latencies.lock);
2032 }
2033 }
2034
2035 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2036 sizeof(blktrc));
2037 }
2038
2039 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2040 {
2041 struct scsi_cmnd *scmnd = req->data;
2042 struct scsi_device *sdev = scmnd->device;
2043 struct zfcp_scsi_dev *zfcp_sdev;
2044 struct fsf_qtcb_header *header = &req->qtcb->header;
2045
2046 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2047 return;
2048
2049 zfcp_sdev = sdev_to_zfcp(sdev);
2050
2051 switch (header->fsf_status) {
2052 case FSF_HANDLE_MISMATCH:
2053 case FSF_PORT_HANDLE_NOT_VALID:
2054 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2055 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2056 break;
2057 case FSF_FCPLUN_NOT_VALID:
2058 case FSF_LUN_HANDLE_NOT_VALID:
2059 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2060 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2061 break;
2062 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2063 zfcp_fsf_class_not_supp(req);
2064 break;
2065 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2066 dev_err(&req->adapter->ccw_device->dev,
2067 "Incorrect direction %d, LUN 0x%016Lx on port "
2068 "0x%016Lx closed\n",
2069 req->qtcb->bottom.io.data_direction,
2070 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2071 (unsigned long long)zfcp_sdev->port->wwpn);
2072 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2073 "fssfch3");
2074 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2075 break;
2076 case FSF_CMND_LENGTH_NOT_VALID:
2077 dev_err(&req->adapter->ccw_device->dev,
2078 "Incorrect CDB length %d, LUN 0x%016Lx on "
2079 "port 0x%016Lx closed\n",
2080 req->qtcb->bottom.io.fcp_cmnd_length,
2081 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2082 (unsigned long long)zfcp_sdev->port->wwpn);
2083 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2084 "fssfch4");
2085 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2086 break;
2087 case FSF_PORT_BOXED:
2088 zfcp_erp_set_port_status(zfcp_sdev->port,
2089 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2090 zfcp_erp_port_reopen(zfcp_sdev->port,
2091 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2092 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2093 break;
2094 case FSF_LUN_BOXED:
2095 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2096 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2097 "fssfch6");
2098 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2099 break;
2100 case FSF_ADAPTER_STATUS_AVAILABLE:
2101 if (header->fsf_status_qual.word[0] ==
2102 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2103 zfcp_fc_test_link(zfcp_sdev->port);
2104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2105 break;
2106 }
2107 }
2108
2109 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2110 {
2111 struct scsi_cmnd *scpnt;
2112 struct fcp_resp_with_ext *fcp_rsp;
2113 unsigned long flags;
2114
2115 read_lock_irqsave(&req->adapter->abort_lock, flags);
2116
2117 scpnt = req->data;
2118 if (unlikely(!scpnt)) {
2119 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2120 return;
2121 }
2122
2123 zfcp_fsf_fcp_handler_common(req);
2124
2125 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2126 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2127 goto skip_fsfstatus;
2128 }
2129
2130 switch (req->qtcb->header.fsf_status) {
2131 case FSF_INCONSISTENT_PROT_DATA:
2132 case FSF_INVALID_PROT_PARM:
2133 set_host_byte(scpnt, DID_ERROR);
2134 goto skip_fsfstatus;
2135 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2136 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2137 goto skip_fsfstatus;
2138 case FSF_APP_TAG_CHECK_FAILURE:
2139 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2140 goto skip_fsfstatus;
2141 case FSF_REF_TAG_CHECK_FAILURE:
2142 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2143 goto skip_fsfstatus;
2144 }
2145 BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2146 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2147 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2148
2149 skip_fsfstatus:
2150 zfcp_fsf_req_trace(req, scpnt);
2151 zfcp_dbf_scsi_result(scpnt, req);
2152
2153 scpnt->host_scribble = NULL;
2154 (scpnt->scsi_done) (scpnt);
2155 /*
2156 * We must hold this lock until scsi_done has been called.
2157 * Otherwise we may call scsi_done after abort regarding this
2158 * command has completed.
2159 * Note: scsi_done must not block!
2160 */
2161 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2162 }
2163
2164 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2165 {
2166 switch (scsi_get_prot_op(scsi_cmnd)) {
2167 case SCSI_PROT_NORMAL:
2168 switch (scsi_cmnd->sc_data_direction) {
2169 case DMA_NONE:
2170 *data_dir = FSF_DATADIR_CMND;
2171 break;
2172 case DMA_FROM_DEVICE:
2173 *data_dir = FSF_DATADIR_READ;
2174 break;
2175 case DMA_TO_DEVICE:
2176 *data_dir = FSF_DATADIR_WRITE;
2177 break;
2178 case DMA_BIDIRECTIONAL:
2179 return -EINVAL;
2180 }
2181 break;
2182
2183 case SCSI_PROT_READ_STRIP:
2184 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2185 break;
2186 case SCSI_PROT_WRITE_INSERT:
2187 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2188 break;
2189 case SCSI_PROT_READ_PASS:
2190 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2191 break;
2192 case SCSI_PROT_WRITE_PASS:
2193 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2194 break;
2195 default:
2196 return -EINVAL;
2197 }
2198
2199 return 0;
2200 }
2201
2202 /**
2203 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2204 * @scsi_cmnd: scsi command to be sent
2205 */
2206 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2207 {
2208 struct zfcp_fsf_req *req;
2209 struct fcp_cmnd *fcp_cmnd;
2210 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2211 int retval = -EIO;
2212 struct scsi_device *sdev = scsi_cmnd->device;
2213 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2214 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2215 struct zfcp_qdio *qdio = adapter->qdio;
2216 struct fsf_qtcb_bottom_io *io;
2217 unsigned long flags;
2218
2219 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2220 ZFCP_STATUS_COMMON_UNBLOCKED)))
2221 return -EBUSY;
2222
2223 spin_lock_irqsave(&qdio->req_q_lock, flags);
2224 if (atomic_read(&qdio->req_q_free) <= 0) {
2225 atomic_inc(&qdio->req_q_full);
2226 goto out;
2227 }
2228
2229 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2230 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2231
2232 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2233 sbtype, adapter->pool.scsi_req);
2234
2235 if (IS_ERR(req)) {
2236 retval = PTR_ERR(req);
2237 goto out;
2238 }
2239
2240 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2241
2242 io = &req->qtcb->bottom.io;
2243 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2244 req->data = scsi_cmnd;
2245 req->handler = zfcp_fsf_fcp_cmnd_handler;
2246 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2247 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2248 io->service_class = FSF_CLASS_3;
2249 io->fcp_cmnd_length = FCP_CMND_LEN;
2250
2251 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2252 io->data_block_length = scsi_cmnd->device->sector_size;
2253 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2254 }
2255
2256 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2257 goto failed_scsi_cmnd;
2258
2259 BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2260 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2261 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2262
2263 if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2264 scsi_prot_sg_count(scsi_cmnd)) {
2265 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2266 scsi_prot_sg_count(scsi_cmnd));
2267 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2268 scsi_prot_sglist(scsi_cmnd));
2269 if (retval)
2270 goto failed_scsi_cmnd;
2271 io->prot_data_length = zfcp_qdio_real_bytes(
2272 scsi_prot_sglist(scsi_cmnd));
2273 }
2274
2275 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2276 scsi_sglist(scsi_cmnd));
2277 if (unlikely(retval))
2278 goto failed_scsi_cmnd;
2279
2280 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2281 if (zfcp_adapter_multi_buffer_active(adapter))
2282 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2283
2284 retval = zfcp_fsf_req_send(req);
2285 if (unlikely(retval))
2286 goto failed_scsi_cmnd;
2287
2288 goto out;
2289
2290 failed_scsi_cmnd:
2291 zfcp_fsf_req_free(req);
2292 scsi_cmnd->host_scribble = NULL;
2293 out:
2294 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2295 return retval;
2296 }
2297
2298 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2299 {
2300 struct fcp_resp_with_ext *fcp_rsp;
2301 struct fcp_resp_rsp_info *rsp_info;
2302
2303 zfcp_fsf_fcp_handler_common(req);
2304
2305 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2306 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2307
2308 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2309 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2310 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2311 }
2312
2313 /**
2314 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2315 * @scmnd: SCSI command to send the task management command for
2316 * @tm_flags: unsigned byte for task management flags
2317 * Returns: on success pointer to struct fsf_req, NULL otherwise
2318 */
2319 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2320 u8 tm_flags)
2321 {
2322 struct zfcp_fsf_req *req = NULL;
2323 struct fcp_cmnd *fcp_cmnd;
2324 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2325 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2326
2327 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2328 ZFCP_STATUS_COMMON_UNBLOCKED)))
2329 return NULL;
2330
2331 spin_lock_irq(&qdio->req_q_lock);
2332 if (zfcp_qdio_sbal_get(qdio))
2333 goto out;
2334
2335 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2336 SBAL_SFLAGS0_TYPE_WRITE,
2337 qdio->adapter->pool.scsi_req);
2338
2339 if (IS_ERR(req)) {
2340 req = NULL;
2341 goto out;
2342 }
2343
2344 req->data = scmnd;
2345 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2346 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2347 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2350 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2351
2352 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2353
2354 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2355 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2356
2357 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2358 if (!zfcp_fsf_req_send(req))
2359 goto out;
2360
2361 zfcp_fsf_req_free(req);
2362 req = NULL;
2363 out:
2364 spin_unlock_irq(&qdio->req_q_lock);
2365 return req;
2366 }
2367
2368 /**
2369 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2370 * @adapter: pointer to struct zfcp_adapter
2371 * @sbal_idx: response queue index of SBAL to be processed
2372 */
2373 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2374 {
2375 struct zfcp_adapter *adapter = qdio->adapter;
2376 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2377 struct qdio_buffer_element *sbale;
2378 struct zfcp_fsf_req *fsf_req;
2379 unsigned long req_id;
2380 int idx;
2381
2382 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2383
2384 sbale = &sbal->element[idx];
2385 req_id = (unsigned long) sbale->addr;
2386 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2387
2388 if (!fsf_req) {
2389 /*
2390 * Unknown request means that we have potentially memory
2391 * corruption and must stop the machine immediately.
2392 */
2393 zfcp_qdio_siosl(adapter);
2394 panic("error: unknown req_id (%lx) on adapter %s.\n",
2395 req_id, dev_name(&adapter->ccw_device->dev));
2396 }
2397
2398 zfcp_fsf_req_complete(fsf_req);
2399
2400 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2401 break;
2402 }
2403 }
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