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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * zfcp device driver
4 *
5 * Implementation of FSF commands.
6 *
7 * Copyright IBM Corp. 2002, 2023
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/jiffies.h>
15#include <linux/types.h>
16#include <linux/slab.h>
17#include <scsi/fc/fc_els.h>
18#include "zfcp_ext.h"
19#include "zfcp_fc.h"
20#include "zfcp_dbf.h"
21#include "zfcp_qdio.h"
22#include "zfcp_reqlist.h"
23#include "zfcp_diag.h"
24
25/* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */
26#define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ)
27/* timeout for: exchange config/port data outside ERP, or open/close WKA port */
28#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
29
30struct kmem_cache *zfcp_fsf_qtcb_cache;
31
32static bool ber_stop = true;
33module_param(ber_stop, bool, 0600);
34MODULE_PARM_DESC(ber_stop,
35 "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
36
37static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
38{
39 struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
40 struct zfcp_adapter *adapter = fsf_req->adapter;
41
42 zfcp_qdio_siosl(adapter);
43 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
44 "fsrth_1");
45}
46
47static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
48 unsigned long timeout)
49{
50 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
51 fsf_req->timer.expires = jiffies + timeout;
52 add_timer(&fsf_req->timer);
53}
54
55static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
56{
57 BUG_ON(!fsf_req->erp_action);
58 fsf_req->timer.function = zfcp_erp_timeout_handler;
59 fsf_req->timer.expires = jiffies + 30 * HZ;
60 add_timer(&fsf_req->timer);
61}
62
63/* association between FSF command and FSF QTCB type */
64static u32 fsf_qtcb_type[] = {
65 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
66 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
67 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
68 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
69 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
70 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
71 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
72 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
73 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
74 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
75 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
76 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
77 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
78};
79
80static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
81{
82 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
83 "operational because of an unsupported FC class\n");
84 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
85 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
86}
87
88/**
89 * zfcp_fsf_req_free - free memory used by fsf request
90 * @req: pointer to struct zfcp_fsf_req
91 */
92void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
93{
94 if (likely(req->pool)) {
95 if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
96 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
97 mempool_free(req, req->pool);
98 return;
99 }
100
101 if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
102 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
103 kfree(req);
104}
105
106static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
107{
108 unsigned long flags;
109 struct fsf_status_read_buffer *sr_buf = req->data;
110 struct zfcp_adapter *adapter = req->adapter;
111 struct zfcp_port *port;
112 int d_id = ntoh24(sr_buf->d_id);
113
114 read_lock_irqsave(&adapter->port_list_lock, flags);
115 list_for_each_entry(port, &adapter->port_list, list)
116 if (port->d_id == d_id) {
117 zfcp_erp_port_reopen(port, 0, "fssrpc1");
118 break;
119 }
120 read_unlock_irqrestore(&adapter->port_list_lock, flags);
121}
122
123void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter)
124{
125 struct Scsi_Host *shost = adapter->scsi_host;
126
127 adapter->hydra_version = 0;
128 adapter->peer_wwpn = 0;
129 adapter->peer_wwnn = 0;
130 adapter->peer_d_id = 0;
131
132 /* if there is no shost yet, we have nothing to zero-out */
133 if (shost == NULL)
134 return;
135
136 fc_host_port_id(shost) = 0;
137 fc_host_fabric_name(shost) = 0;
138 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
139 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
140 snprintf(fc_host_model(shost), FC_SYMBOLIC_NAME_SIZE, "0x%04x", 0);
141 memset(fc_host_active_fc4s(shost), 0, FC_FC4_LIST_SIZE);
142}
143
144static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
145 struct fsf_link_down_info *link_down)
146{
147 struct zfcp_adapter *adapter = req->adapter;
148
149 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
150 return;
151
152 atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
153
154 zfcp_scsi_schedule_rports_block(adapter);
155
156 zfcp_fsf_fc_host_link_down(adapter);
157
158 if (!link_down)
159 goto out;
160
161 switch (link_down->error_code) {
162 case FSF_PSQ_LINK_NO_LIGHT:
163 dev_warn(&req->adapter->ccw_device->dev,
164 "There is no light signal from the local "
165 "fibre channel cable\n");
166 break;
167 case FSF_PSQ_LINK_WRAP_PLUG:
168 dev_warn(&req->adapter->ccw_device->dev,
169 "There is a wrap plug instead of a fibre "
170 "channel cable\n");
171 break;
172 case FSF_PSQ_LINK_NO_FCP:
173 dev_warn(&req->adapter->ccw_device->dev,
174 "The adjacent fibre channel node does not "
175 "support FCP\n");
176 break;
177 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
178 dev_warn(&req->adapter->ccw_device->dev,
179 "The FCP device is suspended because of a "
180 "firmware update\n");
181 break;
182 case FSF_PSQ_LINK_INVALID_WWPN:
183 dev_warn(&req->adapter->ccw_device->dev,
184 "The FCP device detected a WWPN that is "
185 "duplicate or not valid\n");
186 break;
187 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
188 dev_warn(&req->adapter->ccw_device->dev,
189 "The fibre channel fabric does not support NPIV\n");
190 break;
191 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
192 dev_warn(&req->adapter->ccw_device->dev,
193 "The FCP adapter cannot support more NPIV ports\n");
194 break;
195 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
196 dev_warn(&req->adapter->ccw_device->dev,
197 "The adjacent switch cannot support "
198 "more NPIV ports\n");
199 break;
200 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
201 dev_warn(&req->adapter->ccw_device->dev,
202 "The FCP adapter could not log in to the "
203 "fibre channel fabric\n");
204 break;
205 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
206 dev_warn(&req->adapter->ccw_device->dev,
207 "The WWPN assignment file on the FCP adapter "
208 "has been damaged\n");
209 break;
210 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
211 dev_warn(&req->adapter->ccw_device->dev,
212 "The mode table on the FCP adapter "
213 "has been damaged\n");
214 break;
215 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
216 dev_warn(&req->adapter->ccw_device->dev,
217 "All NPIV ports on the FCP adapter have "
218 "been assigned\n");
219 break;
220 default:
221 dev_warn(&req->adapter->ccw_device->dev,
222 "The link between the FCP adapter and "
223 "the FC fabric is down\n");
224 }
225out:
226 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
227}
228
229static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
230{
231 struct fsf_status_read_buffer *sr_buf = req->data;
232 struct fsf_link_down_info *ldi =
233 (struct fsf_link_down_info *) &sr_buf->payload;
234
235 switch (sr_buf->status_subtype) {
236 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
237 case FSF_STATUS_READ_SUB_FDISC_FAILED:
238 zfcp_fsf_link_down_info_eval(req, ldi);
239 break;
240 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
241 zfcp_fsf_link_down_info_eval(req, NULL);
242 }
243}
244
245static void
246zfcp_fsf_status_read_version_change(struct zfcp_adapter *adapter,
247 struct fsf_status_read_buffer *sr_buf)
248{
249 if (sr_buf->status_subtype == FSF_STATUS_READ_SUB_LIC_CHANGE) {
250 u32 version = sr_buf->payload.version_change.current_version;
251
252 WRITE_ONCE(adapter->fsf_lic_version, version);
253 snprintf(fc_host_firmware_version(adapter->scsi_host),
254 FC_VERSION_STRING_SIZE, "%#08x", version);
255 }
256}
257
258static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
259{
260 struct zfcp_adapter *adapter = req->adapter;
261 struct fsf_status_read_buffer *sr_buf = req->data;
262
263 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
264 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
265 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
266 zfcp_fsf_req_free(req);
267 return;
268 }
269
270 zfcp_dbf_hba_fsf_uss("fssrh_4", req);
271
272 switch (sr_buf->status_type) {
273 case FSF_STATUS_READ_PORT_CLOSED:
274 zfcp_fsf_status_read_port_closed(req);
275 break;
276 case FSF_STATUS_READ_INCOMING_ELS:
277 zfcp_fc_incoming_els(req);
278 break;
279 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
280 break;
281 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
282 zfcp_dbf_hba_bit_err("fssrh_3", req);
283 if (ber_stop) {
284 dev_warn(&adapter->ccw_device->dev,
285 "All paths over this FCP device are disused because of excessive bit errors\n");
286 zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
287 } else {
288 dev_warn(&adapter->ccw_device->dev,
289 "The error threshold for checksum statistics has been exceeded\n");
290 }
291 break;
292 case FSF_STATUS_READ_LINK_DOWN:
293 zfcp_fsf_status_read_link_down(req);
294 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
295 break;
296 case FSF_STATUS_READ_LINK_UP:
297 dev_info(&adapter->ccw_device->dev,
298 "The local link has been restored\n");
299 /* All ports should be marked as ready to run again */
300 zfcp_erp_set_adapter_status(adapter,
301 ZFCP_STATUS_COMMON_RUNNING);
302 zfcp_erp_adapter_reopen(adapter,
303 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
304 ZFCP_STATUS_COMMON_ERP_FAILED,
305 "fssrh_2");
306 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
307
308 break;
309 case FSF_STATUS_READ_NOTIFICATION_LOST:
310 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
311 zfcp_fc_conditional_port_scan(adapter);
312 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_VERSION_CHANGE)
313 queue_work(adapter->work_queue,
314 &adapter->version_change_lost_work);
315 break;
316 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
317 adapter->adapter_features = sr_buf->payload.word[0];
318 break;
319 case FSF_STATUS_READ_VERSION_CHANGE:
320 zfcp_fsf_status_read_version_change(adapter, sr_buf);
321 break;
322 }
323
324 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
325 zfcp_fsf_req_free(req);
326
327 atomic_inc(&adapter->stat_miss);
328 queue_work(adapter->work_queue, &adapter->stat_work);
329}
330
331static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
332{
333 switch (req->qtcb->header.fsf_status_qual.word[0]) {
334 case FSF_SQ_FCP_RSP_AVAILABLE:
335 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
336 case FSF_SQ_NO_RETRY_POSSIBLE:
337 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
338 return;
339 case FSF_SQ_COMMAND_ABORTED:
340 break;
341 case FSF_SQ_NO_RECOM:
342 dev_err(&req->adapter->ccw_device->dev,
343 "The FCP adapter reported a problem "
344 "that cannot be recovered\n");
345 zfcp_qdio_siosl(req->adapter);
346 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
347 break;
348 }
349 /* all non-return stats set FSFREQ_ERROR*/
350 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
351}
352
353static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
354{
355 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
356 return;
357
358 switch (req->qtcb->header.fsf_status) {
359 case FSF_UNKNOWN_COMMAND:
360 dev_err(&req->adapter->ccw_device->dev,
361 "The FCP adapter does not recognize the command 0x%x\n",
362 req->qtcb->header.fsf_command);
363 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
364 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
365 break;
366 case FSF_ADAPTER_STATUS_AVAILABLE:
367 zfcp_fsf_fsfstatus_qual_eval(req);
368 break;
369 }
370}
371
372static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
373{
374 struct zfcp_adapter *adapter = req->adapter;
375 struct fsf_qtcb *qtcb = req->qtcb;
376 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
377
378 zfcp_dbf_hba_fsf_response(req);
379
380 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
381 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
382 return;
383 }
384
385 switch (qtcb->prefix.prot_status) {
386 case FSF_PROT_GOOD:
387 case FSF_PROT_FSF_STATUS_PRESENTED:
388 return;
389 case FSF_PROT_QTCB_VERSION_ERROR:
390 dev_err(&adapter->ccw_device->dev,
391 "QTCB version 0x%x not supported by FCP adapter "
392 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
393 psq->word[0], psq->word[1]);
394 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
395 break;
396 case FSF_PROT_ERROR_STATE:
397 case FSF_PROT_SEQ_NUMB_ERROR:
398 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
399 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
400 break;
401 case FSF_PROT_UNSUPP_QTCB_TYPE:
402 dev_err(&adapter->ccw_device->dev,
403 "The QTCB type is not supported by the FCP adapter\n");
404 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
405 break;
406 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
407 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
408 &adapter->status);
409 break;
410 case FSF_PROT_DUPLICATE_REQUEST_ID:
411 dev_err(&adapter->ccw_device->dev,
412 "0x%Lx is an ambiguous request identifier\n",
413 (unsigned long long)qtcb->bottom.support.req_handle);
414 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
415 break;
416 case FSF_PROT_LINK_DOWN:
417 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
418 /* go through reopen to flush pending requests */
419 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
420 break;
421 case FSF_PROT_REEST_QUEUE:
422 /* All ports should be marked as ready to run again */
423 zfcp_erp_set_adapter_status(adapter,
424 ZFCP_STATUS_COMMON_RUNNING);
425 zfcp_erp_adapter_reopen(adapter,
426 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
427 ZFCP_STATUS_COMMON_ERP_FAILED,
428 "fspse_8");
429 break;
430 default:
431 dev_err(&adapter->ccw_device->dev,
432 "0x%x is not a valid transfer protocol status\n",
433 qtcb->prefix.prot_status);
434 zfcp_qdio_siosl(adapter);
435 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
436 }
437 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
438}
439
440/**
441 * zfcp_fsf_req_complete - process completion of a FSF request
442 * @req: The FSF request that has been completed.
443 *
444 * When a request has been completed either from the FCP adapter,
445 * or it has been dismissed due to a queue shutdown, this function
446 * is called to process the completion status and trigger further
447 * events related to the FSF request.
448 * Caller must ensure that the request has been removed from
449 * adapter->req_list, to protect against concurrent modification
450 * by zfcp_erp_strategy_check_fsfreq().
451 */
452static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
453{
454 struct zfcp_erp_action *erp_action;
455
456 if (unlikely(zfcp_fsf_req_is_status_read_buffer(req))) {
457 zfcp_fsf_status_read_handler(req);
458 return;
459 }
460
461 del_timer_sync(&req->timer);
462 zfcp_fsf_protstatus_eval(req);
463 zfcp_fsf_fsfstatus_eval(req);
464 req->handler(req);
465
466 erp_action = req->erp_action;
467 if (erp_action)
468 zfcp_erp_notify(erp_action, 0);
469
470 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
471 zfcp_fsf_req_free(req);
472 else
473 complete(&req->completion);
474}
475
476/**
477 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
478 * @adapter: pointer to struct zfcp_adapter
479 *
480 * Never ever call this without shutting down the adapter first.
481 * Otherwise the adapter would continue using and corrupting s390 storage.
482 * Included BUG_ON() call to ensure this is done.
483 * ERP is supposed to be the only user of this function.
484 */
485void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
486{
487 struct zfcp_fsf_req *req, *tmp;
488 LIST_HEAD(remove_queue);
489
490 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
491 zfcp_reqlist_move(adapter->req_list, &remove_queue);
492
493 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
494 list_del(&req->list);
495 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
496 zfcp_fsf_req_complete(req);
497 }
498}
499
500#define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
501#define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
502#define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
503#define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
504#define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
505#define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
506#define ZFCP_FSF_PORTSPEED_32GBIT (1 << 6)
507#define ZFCP_FSF_PORTSPEED_64GBIT (1 << 7)
508#define ZFCP_FSF_PORTSPEED_128GBIT (1 << 8)
509#define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
510
511u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
512{
513 u32 fdmi_speed = 0;
514 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
515 fdmi_speed |= FC_PORTSPEED_1GBIT;
516 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
517 fdmi_speed |= FC_PORTSPEED_2GBIT;
518 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
519 fdmi_speed |= FC_PORTSPEED_4GBIT;
520 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
521 fdmi_speed |= FC_PORTSPEED_10GBIT;
522 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
523 fdmi_speed |= FC_PORTSPEED_8GBIT;
524 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
525 fdmi_speed |= FC_PORTSPEED_16GBIT;
526 if (fsf_speed & ZFCP_FSF_PORTSPEED_32GBIT)
527 fdmi_speed |= FC_PORTSPEED_32GBIT;
528 if (fsf_speed & ZFCP_FSF_PORTSPEED_64GBIT)
529 fdmi_speed |= FC_PORTSPEED_64GBIT;
530 if (fsf_speed & ZFCP_FSF_PORTSPEED_128GBIT)
531 fdmi_speed |= FC_PORTSPEED_128GBIT;
532 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
533 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
534 return fdmi_speed;
535}
536
537static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
538{
539 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
540 struct zfcp_adapter *adapter = req->adapter;
541 struct fc_els_flogi *plogi;
542
543 /* adjust pointers for missing command code */
544 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
545 - sizeof(u32));
546
547 if (req->data)
548 memcpy(req->data, bottom, sizeof(*bottom));
549
550 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
551 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
552 (u16)FSF_STATUS_READS_RECOM);
553
554 /* no error return above here, otherwise must fix call chains */
555 /* do not evaluate invalid fields */
556 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
557 return 0;
558
559 adapter->hydra_version = bottom->adapter_type;
560
561 switch (bottom->fc_topology) {
562 case FSF_TOPO_P2P:
563 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
564 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
565 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
566 break;
567 case FSF_TOPO_FABRIC:
568 break;
569 case FSF_TOPO_AL:
570 default:
571 dev_err(&adapter->ccw_device->dev,
572 "Unknown or unsupported arbitrated loop "
573 "fibre channel topology detected\n");
574 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
575 return -EIO;
576 }
577
578 return 0;
579}
580
581static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
582{
583 struct zfcp_adapter *adapter = req->adapter;
584 struct zfcp_diag_header *const diag_hdr =
585 &adapter->diagnostics->config_data.header;
586 struct fsf_qtcb *qtcb = req->qtcb;
587 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
588
589 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
590 return;
591
592 adapter->fsf_lic_version = bottom->lic_version;
593 adapter->adapter_features = bottom->adapter_features;
594 adapter->connection_features = bottom->connection_features;
595 adapter->peer_wwpn = 0;
596 adapter->peer_wwnn = 0;
597 adapter->peer_d_id = 0;
598
599 switch (qtcb->header.fsf_status) {
600 case FSF_GOOD:
601 /*
602 * usually we wait with an update till the cache is too old,
603 * but because we have the data available, update it anyway
604 */
605 zfcp_diag_update_xdata(diag_hdr, bottom, false);
606
607 zfcp_scsi_shost_update_config_data(adapter, bottom, false);
608 if (zfcp_fsf_exchange_config_evaluate(req))
609 return;
610
611 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
612 dev_err(&adapter->ccw_device->dev,
613 "FCP adapter maximum QTCB size (%d bytes) "
614 "is too small\n",
615 bottom->max_qtcb_size);
616 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
617 return;
618 }
619 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
620 &adapter->status);
621 break;
622 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
623 zfcp_diag_update_xdata(diag_hdr, bottom, true);
624 req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
625
626 /* avoids adapter shutdown to be able to recognize
627 * events such as LINK UP */
628 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
629 &adapter->status);
630 zfcp_fsf_link_down_info_eval(req,
631 &qtcb->header.fsf_status_qual.link_down_info);
632
633 zfcp_scsi_shost_update_config_data(adapter, bottom, true);
634 if (zfcp_fsf_exchange_config_evaluate(req))
635 return;
636 break;
637 default:
638 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
639 return;
640 }
641
642 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)
643 adapter->hardware_version = bottom->hardware_version;
644
645 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
646 dev_err(&adapter->ccw_device->dev,
647 "The FCP adapter only supports newer "
648 "control block versions\n");
649 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
650 return;
651 }
652 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
653 dev_err(&adapter->ccw_device->dev,
654 "The FCP adapter only supports older "
655 "control block versions\n");
656 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
657 }
658}
659
660/*
661 * Mapping of FC Endpoint Security flag masks to mnemonics
662 *
663 * NOTE: Update macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH when making any
664 * changes.
665 */
666static const struct {
667 u32 mask;
668 char *name;
669} zfcp_fsf_fc_security_mnemonics[] = {
670 { FSF_FC_SECURITY_AUTH, "Authentication" },
671 { FSF_FC_SECURITY_ENC_FCSP2 |
672 FSF_FC_SECURITY_ENC_ERAS, "Encryption" },
673};
674
675/* maximum strlen(zfcp_fsf_fc_security_mnemonics[...].name) + 1 */
676#define ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH 15
677
678/**
679 * zfcp_fsf_scnprint_fc_security() - translate FC Endpoint Security flags into
680 * mnemonics and place in a buffer
681 * @buf : the buffer to place the translated FC Endpoint Security flag(s)
682 * into
683 * @size : the size of the buffer, including the trailing null space
684 * @fc_security: one or more FC Endpoint Security flags, or zero
685 * @fmt : specifies whether a list or a single item is to be put into the
686 * buffer
687 *
688 * The Fibre Channel (FC) Endpoint Security flags are translated into mnemonics.
689 * If the FC Endpoint Security flags are zero "none" is placed into the buffer.
690 *
691 * With ZFCP_FSF_PRINT_FMT_LIST the mnemonics are placed as a list separated by
692 * a comma followed by a space into the buffer. If one or more FC Endpoint
693 * Security flags cannot be translated into a mnemonic, as they are undefined
694 * in zfcp_fsf_fc_security_mnemonics, their bitwise ORed value in hexadecimal
695 * representation is placed into the buffer.
696 *
697 * With ZFCP_FSF_PRINT_FMT_SINGLEITEM only one single mnemonic is placed into
698 * the buffer. If the FC Endpoint Security flag cannot be translated, as it is
699 * undefined in zfcp_fsf_fc_security_mnemonics, its value in hexadecimal
700 * representation is placed into the buffer. If more than one FC Endpoint
701 * Security flag was specified, their value in hexadecimal representation is
702 * placed into the buffer. The macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH
703 * can be used to define a buffer that is large enough to hold one mnemonic.
704 *
705 * Return: The number of characters written into buf not including the trailing
706 * '\0'. If size is == 0 the function returns 0.
707 */
708ssize_t zfcp_fsf_scnprint_fc_security(char *buf, size_t size, u32 fc_security,
709 enum zfcp_fsf_print_fmt fmt)
710{
711 const char *prefix = "";
712 ssize_t len = 0;
713 int i;
714
715 if (fc_security == 0)
716 return scnprintf(buf, size, "none");
717 if (fmt == ZFCP_FSF_PRINT_FMT_SINGLEITEM && hweight32(fc_security) != 1)
718 return scnprintf(buf, size, "0x%08x", fc_security);
719
720 for (i = 0; i < ARRAY_SIZE(zfcp_fsf_fc_security_mnemonics); i++) {
721 if (!(fc_security & zfcp_fsf_fc_security_mnemonics[i].mask))
722 continue;
723
724 len += scnprintf(buf + len, size - len, "%s%s", prefix,
725 zfcp_fsf_fc_security_mnemonics[i].name);
726 prefix = ", ";
727 fc_security &= ~zfcp_fsf_fc_security_mnemonics[i].mask;
728 }
729
730 if (fc_security != 0)
731 len += scnprintf(buf + len, size - len, "%s0x%08x",
732 prefix, fc_security);
733
734 return len;
735}
736
737static void zfcp_fsf_dbf_adapter_fc_security(struct zfcp_adapter *adapter,
738 struct zfcp_fsf_req *req)
739{
740 if (adapter->fc_security_algorithms ==
741 adapter->fc_security_algorithms_old) {
742 /* no change, no trace */
743 return;
744 }
745
746 zfcp_dbf_hba_fsf_fces("fsfcesa", req, ZFCP_DBF_INVALID_WWPN,
747 adapter->fc_security_algorithms_old,
748 adapter->fc_security_algorithms);
749
750 adapter->fc_security_algorithms_old = adapter->fc_security_algorithms;
751}
752
753static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
754{
755 struct zfcp_adapter *adapter = req->adapter;
756 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
757
758 if (req->data)
759 memcpy(req->data, bottom, sizeof(*bottom));
760
761 if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
762 adapter->fc_security_algorithms =
763 bottom->fc_security_algorithms;
764 else
765 adapter->fc_security_algorithms = 0;
766 zfcp_fsf_dbf_adapter_fc_security(adapter, req);
767}
768
769static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
770{
771 struct zfcp_diag_header *const diag_hdr =
772 &req->adapter->diagnostics->port_data.header;
773 struct fsf_qtcb *qtcb = req->qtcb;
774 struct fsf_qtcb_bottom_port *bottom = &qtcb->bottom.port;
775
776 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
777 return;
778
779 switch (qtcb->header.fsf_status) {
780 case FSF_GOOD:
781 /*
782 * usually we wait with an update till the cache is too old,
783 * but because we have the data available, update it anyway
784 */
785 zfcp_diag_update_xdata(diag_hdr, bottom, false);
786
787 zfcp_scsi_shost_update_port_data(req->adapter, bottom);
788 zfcp_fsf_exchange_port_evaluate(req);
789 break;
790 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
791 zfcp_diag_update_xdata(diag_hdr, bottom, true);
792 req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
793
794 zfcp_fsf_link_down_info_eval(req,
795 &qtcb->header.fsf_status_qual.link_down_info);
796
797 zfcp_scsi_shost_update_port_data(req->adapter, bottom);
798 zfcp_fsf_exchange_port_evaluate(req);
799 break;
800 }
801}
802
803static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
804{
805 struct zfcp_fsf_req *req;
806
807 if (likely(pool))
808 req = mempool_alloc(pool, GFP_ATOMIC);
809 else
810 req = kmalloc(sizeof(*req), GFP_ATOMIC);
811
812 if (unlikely(!req))
813 return NULL;
814
815 memset(req, 0, sizeof(*req));
816 req->pool = pool;
817 return req;
818}
819
820static struct fsf_qtcb *zfcp_fsf_qtcb_alloc(mempool_t *pool)
821{
822 struct fsf_qtcb *qtcb;
823
824 if (likely(pool))
825 qtcb = mempool_alloc(pool, GFP_ATOMIC);
826 else
827 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
828
829 if (unlikely(!qtcb))
830 return NULL;
831
832 memset(qtcb, 0, sizeof(*qtcb));
833 return qtcb;
834}
835
836static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
837 u32 fsf_cmd, u8 sbtype,
838 mempool_t *pool)
839{
840 struct zfcp_adapter *adapter = qdio->adapter;
841 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
842
843 if (unlikely(!req))
844 return ERR_PTR(-ENOMEM);
845
846 if (adapter->req_no == 0)
847 adapter->req_no++;
848
849 timer_setup(&req->timer, NULL, 0);
850 init_completion(&req->completion);
851
852 req->adapter = adapter;
853 req->req_id = adapter->req_no;
854
855 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
856 if (likely(pool))
857 req->qtcb = zfcp_fsf_qtcb_alloc(
858 adapter->pool.qtcb_pool);
859 else
860 req->qtcb = zfcp_fsf_qtcb_alloc(NULL);
861
862 if (unlikely(!req->qtcb)) {
863 zfcp_fsf_req_free(req);
864 return ERR_PTR(-ENOMEM);
865 }
866
867 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
868 req->qtcb->prefix.req_id = req->req_id;
869 req->qtcb->prefix.ulp_info = 26;
870 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
871 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
872 req->qtcb->header.req_handle = req->req_id;
873 req->qtcb->header.fsf_command = fsf_cmd;
874 }
875
876 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
877 req->qtcb, sizeof(struct fsf_qtcb));
878
879 return req;
880}
881
882static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
883{
884 const bool is_srb = zfcp_fsf_req_is_status_read_buffer(req);
885 struct zfcp_adapter *adapter = req->adapter;
886 struct zfcp_qdio *qdio = adapter->qdio;
887 u64 req_id = req->req_id;
888
889 zfcp_reqlist_add(adapter->req_list, req);
890
891 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
892 req->issued = get_tod_clock();
893 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
894 del_timer_sync(&req->timer);
895
896 /* lookup request again, list might have changed */
897 if (zfcp_reqlist_find_rm(adapter->req_list, req_id) == NULL)
898 zfcp_dbf_hba_fsf_reqid("fsrsrmf", 1, adapter, req_id);
899
900 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
901 return -EIO;
902 }
903
904 /*
905 * NOTE: DO NOT TOUCH ASYNC req PAST THIS POINT.
906 * ONLY TOUCH SYNC req AGAIN ON req->completion.
907 *
908 * The request might complete and be freed concurrently at any point
909 * now. This is not protected by the QDIO-lock (req_q_lock). So any
910 * uncontrolled access after this might result in an use-after-free bug.
911 * Only if the request doesn't have ZFCP_STATUS_FSFREQ_CLEANUP set, and
912 * when it is completed via req->completion, is it safe to use req
913 * again.
914 */
915
916 /* Don't increase for unsolicited status */
917 if (!is_srb)
918 adapter->fsf_req_seq_no++;
919 adapter->req_no++;
920
921 return 0;
922}
923
924/**
925 * zfcp_fsf_status_read - send status read request
926 * @qdio: pointer to struct zfcp_qdio
927 * Returns: 0 on success, ERROR otherwise
928 */
929int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
930{
931 struct zfcp_adapter *adapter = qdio->adapter;
932 struct zfcp_fsf_req *req;
933 struct fsf_status_read_buffer *sr_buf;
934 struct page *page;
935 int retval = -EIO;
936
937 spin_lock_irq(&qdio->req_q_lock);
938 if (zfcp_qdio_sbal_get(qdio))
939 goto out;
940
941 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
942 SBAL_SFLAGS0_TYPE_STATUS,
943 adapter->pool.status_read_req);
944 if (IS_ERR(req)) {
945 retval = PTR_ERR(req);
946 goto out;
947 }
948
949 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
950 if (!page) {
951 retval = -ENOMEM;
952 goto failed_buf;
953 }
954 sr_buf = page_address(page);
955 memset(sr_buf, 0, sizeof(*sr_buf));
956 req->data = sr_buf;
957
958 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
959 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
960
961 retval = zfcp_fsf_req_send(req);
962 if (retval)
963 goto failed_req_send;
964 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
965
966 goto out;
967
968failed_req_send:
969 req->data = NULL;
970 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
971failed_buf:
972 zfcp_dbf_hba_fsf_uss("fssr__1", req);
973 zfcp_fsf_req_free(req);
974out:
975 spin_unlock_irq(&qdio->req_q_lock);
976 return retval;
977}
978
979static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
980{
981 struct scsi_device *sdev = req->data;
982 struct zfcp_scsi_dev *zfcp_sdev;
983 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
984
985 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
986 return;
987
988 zfcp_sdev = sdev_to_zfcp(sdev);
989
990 switch (req->qtcb->header.fsf_status) {
991 case FSF_PORT_HANDLE_NOT_VALID:
992 if (fsq->word[0] == fsq->word[1]) {
993 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
994 "fsafch1");
995 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
996 }
997 break;
998 case FSF_LUN_HANDLE_NOT_VALID:
999 if (fsq->word[0] == fsq->word[1]) {
1000 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
1001 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1002 }
1003 break;
1004 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1005 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1006 break;
1007 case FSF_PORT_BOXED:
1008 zfcp_erp_set_port_status(zfcp_sdev->port,
1009 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1010 zfcp_erp_port_reopen(zfcp_sdev->port,
1011 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
1012 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1013 break;
1014 case FSF_LUN_BOXED:
1015 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1016 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
1017 "fsafch4");
1018 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1019 break;
1020 case FSF_ADAPTER_STATUS_AVAILABLE:
1021 switch (fsq->word[0]) {
1022 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1023 zfcp_fc_test_link(zfcp_sdev->port);
1024 fallthrough;
1025 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1026 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1027 break;
1028 }
1029 break;
1030 case FSF_GOOD:
1031 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1032 break;
1033 }
1034}
1035
1036/**
1037 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
1038 * @scmnd: The SCSI command to abort
1039 * Returns: pointer to struct zfcp_fsf_req
1040 */
1041
1042struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
1043{
1044 struct zfcp_fsf_req *req = NULL;
1045 struct scsi_device *sdev = scmnd->device;
1046 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1047 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
1048 u64 old_req_id = (u64) scmnd->host_scribble;
1049
1050 spin_lock_irq(&qdio->req_q_lock);
1051 if (zfcp_qdio_sbal_get(qdio))
1052 goto out;
1053 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
1054 SBAL_SFLAGS0_TYPE_READ,
1055 qdio->adapter->pool.scsi_abort);
1056 if (IS_ERR(req)) {
1057 req = NULL;
1058 goto out;
1059 }
1060
1061 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
1062 ZFCP_STATUS_COMMON_UNBLOCKED)))
1063 goto out_error_free;
1064
1065 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1066
1067 req->data = sdev;
1068 req->handler = zfcp_fsf_abort_fcp_command_handler;
1069 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1070 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
1071 req->qtcb->bottom.support.req_handle = old_req_id;
1072
1073 zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
1074 if (!zfcp_fsf_req_send(req)) {
1075 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
1076 goto out;
1077 }
1078
1079out_error_free:
1080 zfcp_fsf_req_free(req);
1081 req = NULL;
1082out:
1083 spin_unlock_irq(&qdio->req_q_lock);
1084 return req;
1085}
1086
1087static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1088{
1089 struct zfcp_adapter *adapter = req->adapter;
1090 struct zfcp_fsf_ct_els *ct = req->data;
1091 struct fsf_qtcb_header *header = &req->qtcb->header;
1092
1093 ct->status = -EINVAL;
1094
1095 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1096 goto skip_fsfstatus;
1097
1098 switch (header->fsf_status) {
1099 case FSF_GOOD:
1100 ct->status = 0;
1101 zfcp_dbf_san_res("fsscth2", req);
1102 break;
1103 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1104 zfcp_fsf_class_not_supp(req);
1105 break;
1106 case FSF_ADAPTER_STATUS_AVAILABLE:
1107 switch (header->fsf_status_qual.word[0]){
1108 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1109 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1110 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1111 break;
1112 }
1113 break;
1114 case FSF_PORT_BOXED:
1115 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1116 break;
1117 case FSF_PORT_HANDLE_NOT_VALID:
1118 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
1119 fallthrough;
1120 case FSF_GENERIC_COMMAND_REJECTED:
1121 case FSF_PAYLOAD_SIZE_MISMATCH:
1122 case FSF_REQUEST_SIZE_TOO_LARGE:
1123 case FSF_RESPONSE_SIZE_TOO_LARGE:
1124 case FSF_SBAL_MISMATCH:
1125 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1126 break;
1127 }
1128
1129skip_fsfstatus:
1130 if (ct->handler)
1131 ct->handler(ct->handler_data);
1132}
1133
1134static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
1135 struct zfcp_qdio_req *q_req,
1136 struct scatterlist *sg_req,
1137 struct scatterlist *sg_resp)
1138{
1139 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
1140 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
1141 zfcp_qdio_set_sbale_last(qdio, q_req);
1142}
1143
1144static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1145 struct scatterlist *sg_req,
1146 struct scatterlist *sg_resp)
1147{
1148 struct zfcp_adapter *adapter = req->adapter;
1149 struct zfcp_qdio *qdio = adapter->qdio;
1150 struct fsf_qtcb *qtcb = req->qtcb;
1151 u32 feat = adapter->adapter_features;
1152
1153 if (zfcp_adapter_multi_buffer_active(adapter)) {
1154 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1155 return -EIO;
1156 qtcb->bottom.support.req_buf_length =
1157 zfcp_qdio_real_bytes(sg_req);
1158 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1159 return -EIO;
1160 qtcb->bottom.support.resp_buf_length =
1161 zfcp_qdio_real_bytes(sg_resp);
1162
1163 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
1164 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1165 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1166 return 0;
1167 }
1168
1169 /* use single, unchained SBAL if it can hold the request */
1170 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1171 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1172 sg_req, sg_resp);
1173 return 0;
1174 }
1175
1176 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1177 return -EOPNOTSUPP;
1178
1179 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1180 return -EIO;
1181
1182 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1183
1184 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1185 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1186
1187 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1188 return -EIO;
1189
1190 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1191
1192 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1193
1194 return 0;
1195}
1196
1197static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1198 struct scatterlist *sg_req,
1199 struct scatterlist *sg_resp,
1200 unsigned int timeout)
1201{
1202 int ret;
1203
1204 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1205 if (ret)
1206 return ret;
1207
1208 /* common settings for ct/gs and els requests */
1209 if (timeout > 255)
1210 timeout = 255; /* max value accepted by hardware */
1211 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1212 req->qtcb->bottom.support.timeout = timeout;
1213 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1214
1215 return 0;
1216}
1217
1218/**
1219 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1220 * @wka_port: pointer to zfcp WKA port to send CT/GS to
1221 * @ct: pointer to struct zfcp_send_ct with data for request
1222 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1223 * @timeout: timeout that hardware should use, and a later software timeout
1224 */
1225int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1226 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1227 unsigned int timeout)
1228{
1229 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1230 struct zfcp_fsf_req *req;
1231 int ret = -EIO;
1232
1233 spin_lock_irq(&qdio->req_q_lock);
1234 if (zfcp_qdio_sbal_get(qdio))
1235 goto out;
1236
1237 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1238 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1239
1240 if (IS_ERR(req)) {
1241 ret = PTR_ERR(req);
1242 goto out;
1243 }
1244
1245 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1246 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1247 if (ret)
1248 goto failed_send;
1249
1250 req->handler = zfcp_fsf_send_ct_handler;
1251 req->qtcb->header.port_handle = wka_port->handle;
1252 ct->d_id = wka_port->d_id;
1253 req->data = ct;
1254
1255 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1256
1257 ret = zfcp_fsf_req_send(req);
1258 if (ret)
1259 goto failed_send;
1260 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1261
1262 goto out;
1263
1264failed_send:
1265 zfcp_fsf_req_free(req);
1266out:
1267 spin_unlock_irq(&qdio->req_q_lock);
1268 return ret;
1269}
1270
1271static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1272{
1273 struct zfcp_fsf_ct_els *send_els = req->data;
1274 struct fsf_qtcb_header *header = &req->qtcb->header;
1275
1276 send_els->status = -EINVAL;
1277
1278 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1279 goto skip_fsfstatus;
1280
1281 switch (header->fsf_status) {
1282 case FSF_GOOD:
1283 send_els->status = 0;
1284 zfcp_dbf_san_res("fsselh1", req);
1285 break;
1286 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1287 zfcp_fsf_class_not_supp(req);
1288 break;
1289 case FSF_ADAPTER_STATUS_AVAILABLE:
1290 switch (header->fsf_status_qual.word[0]){
1291 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1292 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1293 case FSF_SQ_RETRY_IF_POSSIBLE:
1294 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1295 break;
1296 }
1297 break;
1298 case FSF_ELS_COMMAND_REJECTED:
1299 case FSF_PAYLOAD_SIZE_MISMATCH:
1300 case FSF_REQUEST_SIZE_TOO_LARGE:
1301 case FSF_RESPONSE_SIZE_TOO_LARGE:
1302 break;
1303 case FSF_SBAL_MISMATCH:
1304 /* should never occur, avoided in zfcp_fsf_send_els */
1305 fallthrough;
1306 default:
1307 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1308 break;
1309 }
1310skip_fsfstatus:
1311 if (send_els->handler)
1312 send_els->handler(send_els->handler_data);
1313}
1314
1315/**
1316 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1317 * @adapter: pointer to zfcp adapter
1318 * @d_id: N_Port_ID to send ELS to
1319 * @els: pointer to struct zfcp_send_els with data for the command
1320 * @timeout: timeout that hardware should use, and a later software timeout
1321 */
1322int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1323 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1324{
1325 struct zfcp_fsf_req *req;
1326 struct zfcp_qdio *qdio = adapter->qdio;
1327 int ret = -EIO;
1328
1329 spin_lock_irq(&qdio->req_q_lock);
1330 if (zfcp_qdio_sbal_get(qdio))
1331 goto out;
1332
1333 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1334 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1335
1336 if (IS_ERR(req)) {
1337 ret = PTR_ERR(req);
1338 goto out;
1339 }
1340
1341 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1342
1343 if (!zfcp_adapter_multi_buffer_active(adapter))
1344 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1345
1346 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1347
1348 if (ret)
1349 goto failed_send;
1350
1351 hton24(req->qtcb->bottom.support.d_id, d_id);
1352 req->handler = zfcp_fsf_send_els_handler;
1353 els->d_id = d_id;
1354 req->data = els;
1355
1356 zfcp_dbf_san_req("fssels1", req, d_id);
1357
1358 ret = zfcp_fsf_req_send(req);
1359 if (ret)
1360 goto failed_send;
1361 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1362
1363 goto out;
1364
1365failed_send:
1366 zfcp_fsf_req_free(req);
1367out:
1368 spin_unlock_irq(&qdio->req_q_lock);
1369 return ret;
1370}
1371
1372int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1373{
1374 struct zfcp_fsf_req *req;
1375 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1376 int retval = -EIO;
1377
1378 spin_lock_irq(&qdio->req_q_lock);
1379 if (zfcp_qdio_sbal_get(qdio))
1380 goto out;
1381
1382 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1383 SBAL_SFLAGS0_TYPE_READ,
1384 qdio->adapter->pool.erp_req);
1385
1386 if (IS_ERR(req)) {
1387 retval = PTR_ERR(req);
1388 goto out;
1389 }
1390
1391 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1392 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1393
1394 req->qtcb->bottom.config.feature_selection =
1395 FSF_FEATURE_NOTIFICATION_LOST |
1396 FSF_FEATURE_UPDATE_ALERT |
1397 FSF_FEATURE_REQUEST_SFP_DATA |
1398 FSF_FEATURE_FC_SECURITY;
1399 req->erp_action = erp_action;
1400 req->handler = zfcp_fsf_exchange_config_data_handler;
1401 erp_action->fsf_req_id = req->req_id;
1402
1403 zfcp_fsf_start_erp_timer(req);
1404 retval = zfcp_fsf_req_send(req);
1405 if (retval) {
1406 zfcp_fsf_req_free(req);
1407 erp_action->fsf_req_id = 0;
1408 }
1409 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1410out:
1411 spin_unlock_irq(&qdio->req_q_lock);
1412 return retval;
1413}
1414
1415
1416/**
1417 * zfcp_fsf_exchange_config_data_sync() - Request information about FCP channel.
1418 * @qdio: pointer to the QDIO-Queue to use for sending the command.
1419 * @data: pointer to the QTCB-Bottom for storing the result of the command,
1420 * might be %NULL.
1421 *
1422 * Returns:
1423 * * 0 - Exchange Config Data was successful, @data is complete
1424 * * -EIO - Exchange Config Data was not successful, @data is invalid
1425 * * -EAGAIN - @data contains incomplete data
1426 * * -ENOMEM - Some memory allocation failed along the way
1427 */
1428int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1429 struct fsf_qtcb_bottom_config *data)
1430{
1431 struct zfcp_fsf_req *req = NULL;
1432 int retval = -EIO;
1433
1434 spin_lock_irq(&qdio->req_q_lock);
1435 if (zfcp_qdio_sbal_get(qdio))
1436 goto out_unlock;
1437
1438 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1439 SBAL_SFLAGS0_TYPE_READ, NULL);
1440
1441 if (IS_ERR(req)) {
1442 retval = PTR_ERR(req);
1443 goto out_unlock;
1444 }
1445
1446 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1447 req->handler = zfcp_fsf_exchange_config_data_handler;
1448
1449 req->qtcb->bottom.config.feature_selection =
1450 FSF_FEATURE_NOTIFICATION_LOST |
1451 FSF_FEATURE_UPDATE_ALERT |
1452 FSF_FEATURE_REQUEST_SFP_DATA |
1453 FSF_FEATURE_FC_SECURITY;
1454
1455 if (data)
1456 req->data = data;
1457
1458 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1459 retval = zfcp_fsf_req_send(req);
1460 spin_unlock_irq(&qdio->req_q_lock);
1461
1462 if (!retval) {
1463 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1464 wait_for_completion(&req->completion);
1465
1466 if (req->status &
1467 (ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
1468 retval = -EIO;
1469 else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
1470 retval = -EAGAIN;
1471 }
1472
1473 zfcp_fsf_req_free(req);
1474 return retval;
1475
1476out_unlock:
1477 spin_unlock_irq(&qdio->req_q_lock);
1478 return retval;
1479}
1480
1481/**
1482 * zfcp_fsf_exchange_port_data - request information about local port
1483 * @erp_action: ERP action for the adapter for which port data is requested
1484 * Returns: 0 on success, error otherwise
1485 */
1486int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1487{
1488 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1489 struct zfcp_fsf_req *req;
1490 int retval = -EIO;
1491
1492 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1493 return -EOPNOTSUPP;
1494
1495 spin_lock_irq(&qdio->req_q_lock);
1496 if (zfcp_qdio_sbal_get(qdio))
1497 goto out;
1498
1499 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1500 SBAL_SFLAGS0_TYPE_READ,
1501 qdio->adapter->pool.erp_req);
1502
1503 if (IS_ERR(req)) {
1504 retval = PTR_ERR(req);
1505 goto out;
1506 }
1507
1508 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1509 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1510
1511 req->handler = zfcp_fsf_exchange_port_data_handler;
1512 req->erp_action = erp_action;
1513 erp_action->fsf_req_id = req->req_id;
1514
1515 zfcp_fsf_start_erp_timer(req);
1516 retval = zfcp_fsf_req_send(req);
1517 if (retval) {
1518 zfcp_fsf_req_free(req);
1519 erp_action->fsf_req_id = 0;
1520 }
1521 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1522out:
1523 spin_unlock_irq(&qdio->req_q_lock);
1524 return retval;
1525}
1526
1527/**
1528 * zfcp_fsf_exchange_port_data_sync() - Request information about local port.
1529 * @qdio: pointer to the QDIO-Queue to use for sending the command.
1530 * @data: pointer to the QTCB-Bottom for storing the result of the command,
1531 * might be %NULL.
1532 *
1533 * Returns:
1534 * * 0 - Exchange Port Data was successful, @data is complete
1535 * * -EIO - Exchange Port Data was not successful, @data is invalid
1536 * * -EAGAIN - @data contains incomplete data
1537 * * -ENOMEM - Some memory allocation failed along the way
1538 * * -EOPNOTSUPP - This operation is not supported
1539 */
1540int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1541 struct fsf_qtcb_bottom_port *data)
1542{
1543 struct zfcp_fsf_req *req = NULL;
1544 int retval = -EIO;
1545
1546 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1547 return -EOPNOTSUPP;
1548
1549 spin_lock_irq(&qdio->req_q_lock);
1550 if (zfcp_qdio_sbal_get(qdio))
1551 goto out_unlock;
1552
1553 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1554 SBAL_SFLAGS0_TYPE_READ, NULL);
1555
1556 if (IS_ERR(req)) {
1557 retval = PTR_ERR(req);
1558 goto out_unlock;
1559 }
1560
1561 if (data)
1562 req->data = data;
1563
1564 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1565
1566 req->handler = zfcp_fsf_exchange_port_data_handler;
1567 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1568 retval = zfcp_fsf_req_send(req);
1569 spin_unlock_irq(&qdio->req_q_lock);
1570
1571 if (!retval) {
1572 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1573 wait_for_completion(&req->completion);
1574
1575 if (req->status &
1576 (ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
1577 retval = -EIO;
1578 else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
1579 retval = -EAGAIN;
1580 }
1581
1582 zfcp_fsf_req_free(req);
1583 return retval;
1584
1585out_unlock:
1586 spin_unlock_irq(&qdio->req_q_lock);
1587 return retval;
1588}
1589
1590static void zfcp_fsf_log_port_fc_security(struct zfcp_port *port,
1591 struct zfcp_fsf_req *req)
1592{
1593 char mnemonic_old[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
1594 char mnemonic_new[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
1595
1596 if (port->connection_info == port->connection_info_old) {
1597 /* no change, no log nor trace */
1598 return;
1599 }
1600
1601 zfcp_dbf_hba_fsf_fces("fsfcesp", req, port->wwpn,
1602 port->connection_info_old,
1603 port->connection_info);
1604
1605 zfcp_fsf_scnprint_fc_security(mnemonic_old, sizeof(mnemonic_old),
1606 port->connection_info_old,
1607 ZFCP_FSF_PRINT_FMT_SINGLEITEM);
1608 zfcp_fsf_scnprint_fc_security(mnemonic_new, sizeof(mnemonic_new),
1609 port->connection_info,
1610 ZFCP_FSF_PRINT_FMT_SINGLEITEM);
1611
1612 if (strncmp(mnemonic_old, mnemonic_new,
1613 ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH) == 0) {
1614 /* no change in string representation, no log */
1615 goto out;
1616 }
1617
1618 if (port->connection_info_old == 0) {
1619 /* activation */
1620 dev_info(&port->adapter->ccw_device->dev,
1621 "FC Endpoint Security of connection to remote port 0x%16llx enabled: %s\n",
1622 port->wwpn, mnemonic_new);
1623 } else if (port->connection_info == 0) {
1624 /* deactivation */
1625 dev_warn(&port->adapter->ccw_device->dev,
1626 "FC Endpoint Security of connection to remote port 0x%16llx disabled: was %s\n",
1627 port->wwpn, mnemonic_old);
1628 } else {
1629 /* change */
1630 dev_warn(&port->adapter->ccw_device->dev,
1631 "FC Endpoint Security of connection to remote port 0x%16llx changed: from %s to %s\n",
1632 port->wwpn, mnemonic_old, mnemonic_new);
1633 }
1634
1635out:
1636 port->connection_info_old = port->connection_info;
1637}
1638
1639static void zfcp_fsf_log_security_error(const struct device *dev, u32 fsf_sqw0,
1640 u64 wwpn)
1641{
1642 switch (fsf_sqw0) {
1643
1644 /*
1645 * Open Port command error codes
1646 */
1647
1648 case FSF_SQ_SECURITY_REQUIRED:
1649 dev_warn_ratelimited(dev,
1650 "FC Endpoint Security error: FC security is required but not supported or configured on remote port 0x%016llx\n",
1651 wwpn);
1652 break;
1653 case FSF_SQ_SECURITY_TIMEOUT:
1654 dev_warn_ratelimited(dev,
1655 "FC Endpoint Security error: a timeout prevented opening remote port 0x%016llx\n",
1656 wwpn);
1657 break;
1658 case FSF_SQ_SECURITY_KM_UNAVAILABLE:
1659 dev_warn_ratelimited(dev,
1660 "FC Endpoint Security error: opening remote port 0x%016llx failed because local and external key manager cannot communicate\n",
1661 wwpn);
1662 break;
1663 case FSF_SQ_SECURITY_RKM_UNAVAILABLE:
1664 dev_warn_ratelimited(dev,
1665 "FC Endpoint Security error: opening remote port 0x%016llx failed because it cannot communicate with the external key manager\n",
1666 wwpn);
1667 break;
1668 case FSF_SQ_SECURITY_AUTH_FAILURE:
1669 dev_warn_ratelimited(dev,
1670 "FC Endpoint Security error: the device could not verify the identity of remote port 0x%016llx\n",
1671 wwpn);
1672 break;
1673
1674 /*
1675 * Send FCP command error codes
1676 */
1677
1678 case FSF_SQ_SECURITY_ENC_FAILURE:
1679 dev_warn_ratelimited(dev,
1680 "FC Endpoint Security error: FC connection to remote port 0x%016llx closed because encryption broke down\n",
1681 wwpn);
1682 break;
1683
1684 /*
1685 * Unknown error codes
1686 */
1687
1688 default:
1689 dev_warn_ratelimited(dev,
1690 "FC Endpoint Security error: the device issued an unknown error code 0x%08x related to the FC connection to remote port 0x%016llx\n",
1691 fsf_sqw0, wwpn);
1692 }
1693}
1694
1695static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1696{
1697 struct zfcp_adapter *adapter = req->adapter;
1698 struct zfcp_port *port = req->data;
1699 struct fsf_qtcb_header *header = &req->qtcb->header;
1700 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1701 struct fc_els_flogi *plogi;
1702
1703 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1704 goto out;
1705
1706 switch (header->fsf_status) {
1707 case FSF_PORT_ALREADY_OPEN:
1708 break;
1709 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1710 dev_warn(&adapter->ccw_device->dev,
1711 "Not enough FCP adapter resources to open "
1712 "remote port 0x%016Lx\n",
1713 (unsigned long long)port->wwpn);
1714 zfcp_erp_set_port_status(port,
1715 ZFCP_STATUS_COMMON_ERP_FAILED);
1716 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1717 break;
1718 case FSF_SECURITY_ERROR:
1719 zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
1720 header->fsf_status_qual.word[0],
1721 port->wwpn);
1722 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1723 break;
1724 case FSF_ADAPTER_STATUS_AVAILABLE:
1725 switch (header->fsf_status_qual.word[0]) {
1726 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1727 /* no zfcp_fc_test_link() with failed open port */
1728 fallthrough;
1729 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1730 case FSF_SQ_NO_RETRY_POSSIBLE:
1731 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1732 break;
1733 }
1734 break;
1735 case FSF_GOOD:
1736 port->handle = header->port_handle;
1737 if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
1738 port->connection_info = bottom->connection_info;
1739 else
1740 port->connection_info = 0;
1741 zfcp_fsf_log_port_fc_security(port, req);
1742 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1743 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1744 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1745 &port->status);
1746 /* check whether D_ID has changed during open */
1747 /*
1748 * FIXME: This check is not airtight, as the FCP channel does
1749 * not monitor closures of target port connections caused on
1750 * the remote side. Thus, they might miss out on invalidating
1751 * locally cached WWPNs (and other N_Port parameters) of gone
1752 * target ports. So, our heroic attempt to make things safe
1753 * could be undermined by 'open port' response data tagged with
1754 * obsolete WWPNs. Another reason to monitor potential
1755 * connection closures ourself at least (by interpreting
1756 * incoming ELS' and unsolicited status). It just crosses my
1757 * mind that one should be able to cross-check by means of
1758 * another GID_PN straight after a port has been opened.
1759 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1760 */
1761 plogi = (struct fc_els_flogi *) bottom->els;
1762 if (bottom->els1_length >= FSF_PLOGI_MIN_LEN)
1763 zfcp_fc_plogi_evaluate(port, plogi);
1764 break;
1765 case FSF_UNKNOWN_OP_SUBTYPE:
1766 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1767 break;
1768 }
1769
1770out:
1771 put_device(&port->dev);
1772}
1773
1774/**
1775 * zfcp_fsf_open_port - create and send open port request
1776 * @erp_action: pointer to struct zfcp_erp_action
1777 * Returns: 0 on success, error otherwise
1778 */
1779int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1780{
1781 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1782 struct zfcp_port *port = erp_action->port;
1783 struct zfcp_fsf_req *req;
1784 int retval = -EIO;
1785
1786 spin_lock_irq(&qdio->req_q_lock);
1787 if (zfcp_qdio_sbal_get(qdio))
1788 goto out;
1789
1790 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1791 SBAL_SFLAGS0_TYPE_READ,
1792 qdio->adapter->pool.erp_req);
1793
1794 if (IS_ERR(req)) {
1795 retval = PTR_ERR(req);
1796 goto out;
1797 }
1798
1799 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1800 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1801
1802 req->handler = zfcp_fsf_open_port_handler;
1803 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1804 req->data = port;
1805 req->erp_action = erp_action;
1806 erp_action->fsf_req_id = req->req_id;
1807 get_device(&port->dev);
1808
1809 zfcp_fsf_start_erp_timer(req);
1810 retval = zfcp_fsf_req_send(req);
1811 if (retval) {
1812 zfcp_fsf_req_free(req);
1813 erp_action->fsf_req_id = 0;
1814 put_device(&port->dev);
1815 }
1816 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1817out:
1818 spin_unlock_irq(&qdio->req_q_lock);
1819 return retval;
1820}
1821
1822static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1823{
1824 struct zfcp_port *port = req->data;
1825
1826 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1827 return;
1828
1829 switch (req->qtcb->header.fsf_status) {
1830 case FSF_PORT_HANDLE_NOT_VALID:
1831 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1832 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1833 break;
1834 case FSF_ADAPTER_STATUS_AVAILABLE:
1835 break;
1836 case FSF_GOOD:
1837 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1838 break;
1839 }
1840}
1841
1842/**
1843 * zfcp_fsf_close_port - create and send close port request
1844 * @erp_action: pointer to struct zfcp_erp_action
1845 * Returns: 0 on success, error otherwise
1846 */
1847int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1848{
1849 struct zfcp_qdio *qdio = erp_action->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_CLOSE_PORT,
1858 SBAL_SFLAGS0_TYPE_READ,
1859 qdio->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->handler = zfcp_fsf_close_port_handler;
1870 req->data = erp_action->port;
1871 req->erp_action = erp_action;
1872 req->qtcb->header.port_handle = erp_action->port->handle;
1873 erp_action->fsf_req_id = req->req_id;
1874
1875 zfcp_fsf_start_erp_timer(req);
1876 retval = zfcp_fsf_req_send(req);
1877 if (retval) {
1878 zfcp_fsf_req_free(req);
1879 erp_action->fsf_req_id = 0;
1880 }
1881 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1882out:
1883 spin_unlock_irq(&qdio->req_q_lock);
1884 return retval;
1885}
1886
1887static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1888{
1889 struct zfcp_fc_wka_port *wka_port = req->data;
1890 struct fsf_qtcb_header *header = &req->qtcb->header;
1891
1892 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1893 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1894 goto out;
1895 }
1896
1897 switch (header->fsf_status) {
1898 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1899 dev_warn(&req->adapter->ccw_device->dev,
1900 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1901 fallthrough;
1902 case FSF_ADAPTER_STATUS_AVAILABLE:
1903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1905 break;
1906 case FSF_GOOD:
1907 wka_port->handle = header->port_handle;
1908 fallthrough;
1909 case FSF_PORT_ALREADY_OPEN:
1910 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1911 }
1912out:
1913 wake_up(&wka_port->opened);
1914}
1915
1916/**
1917 * zfcp_fsf_open_wka_port - create and send open wka-port request
1918 * @wka_port: pointer to struct zfcp_fc_wka_port
1919 * Returns: 0 on success, error otherwise
1920 */
1921int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1922{
1923 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1924 struct zfcp_fsf_req *req;
1925 u64 req_id = 0;
1926 int retval = -EIO;
1927
1928 spin_lock_irq(&qdio->req_q_lock);
1929 if (zfcp_qdio_sbal_get(qdio))
1930 goto out;
1931
1932 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1933 SBAL_SFLAGS0_TYPE_READ,
1934 qdio->adapter->pool.erp_req);
1935
1936 if (IS_ERR(req)) {
1937 retval = PTR_ERR(req);
1938 goto out;
1939 }
1940
1941 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1942 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1943
1944 req->handler = zfcp_fsf_open_wka_port_handler;
1945 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1946 req->data = wka_port;
1947
1948 req_id = req->req_id;
1949
1950 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1951 retval = zfcp_fsf_req_send(req);
1952 if (retval)
1953 zfcp_fsf_req_free(req);
1954 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1955out:
1956 spin_unlock_irq(&qdio->req_q_lock);
1957 if (!retval)
1958 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
1959 return retval;
1960}
1961
1962static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1963{
1964 struct zfcp_fc_wka_port *wka_port = req->data;
1965
1966 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1967 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1968 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1969 }
1970
1971 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1972 wake_up(&wka_port->closed);
1973}
1974
1975/**
1976 * zfcp_fsf_close_wka_port - create and send close wka port request
1977 * @wka_port: WKA port to open
1978 * Returns: 0 on success, error otherwise
1979 */
1980int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1981{
1982 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1983 struct zfcp_fsf_req *req;
1984 u64 req_id = 0;
1985 int retval = -EIO;
1986
1987 spin_lock_irq(&qdio->req_q_lock);
1988 if (zfcp_qdio_sbal_get(qdio))
1989 goto out;
1990
1991 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1992 SBAL_SFLAGS0_TYPE_READ,
1993 qdio->adapter->pool.erp_req);
1994
1995 if (IS_ERR(req)) {
1996 retval = PTR_ERR(req);
1997 goto out;
1998 }
1999
2000 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2001 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2002
2003 req->handler = zfcp_fsf_close_wka_port_handler;
2004 req->data = wka_port;
2005 req->qtcb->header.port_handle = wka_port->handle;
2006
2007 req_id = req->req_id;
2008
2009 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2010 retval = zfcp_fsf_req_send(req);
2011 if (retval)
2012 zfcp_fsf_req_free(req);
2013 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2014out:
2015 spin_unlock_irq(&qdio->req_q_lock);
2016 if (!retval)
2017 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
2018 return retval;
2019}
2020
2021static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
2022{
2023 struct zfcp_port *port = req->data;
2024 struct fsf_qtcb_header *header = &req->qtcb->header;
2025 struct scsi_device *sdev;
2026
2027 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2028 return;
2029
2030 switch (header->fsf_status) {
2031 case FSF_PORT_HANDLE_NOT_VALID:
2032 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
2033 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2034 break;
2035 case FSF_PORT_BOXED:
2036 /* can't use generic zfcp_erp_modify_port_status because
2037 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2038 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2039 shost_for_each_device(sdev, port->adapter->scsi_host)
2040 if (sdev_to_zfcp(sdev)->port == port)
2041 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
2042 &sdev_to_zfcp(sdev)->status);
2043 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2044 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
2045 "fscpph2");
2046 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2047 break;
2048 case FSF_ADAPTER_STATUS_AVAILABLE:
2049 switch (header->fsf_status_qual.word[0]) {
2050 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2051 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2052 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2053 break;
2054 }
2055 break;
2056 case FSF_GOOD:
2057 /* can't use generic zfcp_erp_modify_port_status because
2058 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2059 */
2060 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2061 shost_for_each_device(sdev, port->adapter->scsi_host)
2062 if (sdev_to_zfcp(sdev)->port == port)
2063 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
2064 &sdev_to_zfcp(sdev)->status);
2065 break;
2066 }
2067}
2068
2069/**
2070 * zfcp_fsf_close_physical_port - close physical port
2071 * @erp_action: pointer to struct zfcp_erp_action
2072 * Returns: 0 on success
2073 */
2074int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2075{
2076 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2077 struct zfcp_fsf_req *req;
2078 int retval = -EIO;
2079
2080 spin_lock_irq(&qdio->req_q_lock);
2081 if (zfcp_qdio_sbal_get(qdio))
2082 goto out;
2083
2084 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
2085 SBAL_SFLAGS0_TYPE_READ,
2086 qdio->adapter->pool.erp_req);
2087
2088 if (IS_ERR(req)) {
2089 retval = PTR_ERR(req);
2090 goto out;
2091 }
2092
2093 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2094 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2095
2096 req->data = erp_action->port;
2097 req->qtcb->header.port_handle = erp_action->port->handle;
2098 req->erp_action = erp_action;
2099 req->handler = zfcp_fsf_close_physical_port_handler;
2100 erp_action->fsf_req_id = req->req_id;
2101
2102 zfcp_fsf_start_erp_timer(req);
2103 retval = zfcp_fsf_req_send(req);
2104 if (retval) {
2105 zfcp_fsf_req_free(req);
2106 erp_action->fsf_req_id = 0;
2107 }
2108 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2109out:
2110 spin_unlock_irq(&qdio->req_q_lock);
2111 return retval;
2112}
2113
2114static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
2115{
2116 struct zfcp_adapter *adapter = req->adapter;
2117 struct scsi_device *sdev = req->data;
2118 struct zfcp_scsi_dev *zfcp_sdev;
2119 struct fsf_qtcb_header *header = &req->qtcb->header;
2120 union fsf_status_qual *qual = &header->fsf_status_qual;
2121
2122 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2123 return;
2124
2125 zfcp_sdev = sdev_to_zfcp(sdev);
2126
2127 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2128 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2129 &zfcp_sdev->status);
2130
2131 switch (header->fsf_status) {
2132
2133 case FSF_PORT_HANDLE_NOT_VALID:
2134 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
2135 fallthrough;
2136 case FSF_LUN_ALREADY_OPEN:
2137 break;
2138 case FSF_PORT_BOXED:
2139 zfcp_erp_set_port_status(zfcp_sdev->port,
2140 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2141 zfcp_erp_port_reopen(zfcp_sdev->port,
2142 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
2143 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2144 break;
2145 case FSF_LUN_SHARING_VIOLATION:
2146 if (qual->word[0])
2147 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
2148 "LUN 0x%016Lx on port 0x%016Lx is already in "
2149 "use by CSS%d, MIF Image ID %x\n",
2150 zfcp_scsi_dev_lun(sdev),
2151 (unsigned long long)zfcp_sdev->port->wwpn,
2152 qual->fsf_queue_designator.cssid,
2153 qual->fsf_queue_designator.hla);
2154 zfcp_erp_set_lun_status(sdev,
2155 ZFCP_STATUS_COMMON_ERP_FAILED |
2156 ZFCP_STATUS_COMMON_ACCESS_DENIED);
2157 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2158 break;
2159 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
2160 dev_warn(&adapter->ccw_device->dev,
2161 "No handle is available for LUN "
2162 "0x%016Lx on port 0x%016Lx\n",
2163 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2164 (unsigned long long)zfcp_sdev->port->wwpn);
2165 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
2166 fallthrough;
2167 case FSF_INVALID_COMMAND_OPTION:
2168 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2169 break;
2170 case FSF_ADAPTER_STATUS_AVAILABLE:
2171 switch (header->fsf_status_qual.word[0]) {
2172 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2173 zfcp_fc_test_link(zfcp_sdev->port);
2174 fallthrough;
2175 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2176 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2177 break;
2178 }
2179 break;
2180
2181 case FSF_GOOD:
2182 zfcp_sdev->lun_handle = header->lun_handle;
2183 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
2184 break;
2185 }
2186}
2187
2188/**
2189 * zfcp_fsf_open_lun - open LUN
2190 * @erp_action: pointer to struct zfcp_erp_action
2191 * Returns: 0 on success, error otherwise
2192 */
2193int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
2194{
2195 struct zfcp_adapter *adapter = erp_action->adapter;
2196 struct zfcp_qdio *qdio = adapter->qdio;
2197 struct zfcp_fsf_req *req;
2198 int retval = -EIO;
2199
2200 spin_lock_irq(&qdio->req_q_lock);
2201 if (zfcp_qdio_sbal_get(qdio))
2202 goto out;
2203
2204 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
2205 SBAL_SFLAGS0_TYPE_READ,
2206 adapter->pool.erp_req);
2207
2208 if (IS_ERR(req)) {
2209 retval = PTR_ERR(req);
2210 goto out;
2211 }
2212
2213 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2214 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2215
2216 req->qtcb->header.port_handle = erp_action->port->handle;
2217 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
2218 req->handler = zfcp_fsf_open_lun_handler;
2219 req->data = erp_action->sdev;
2220 req->erp_action = erp_action;
2221 erp_action->fsf_req_id = req->req_id;
2222
2223 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2224 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2225
2226 zfcp_fsf_start_erp_timer(req);
2227 retval = zfcp_fsf_req_send(req);
2228 if (retval) {
2229 zfcp_fsf_req_free(req);
2230 erp_action->fsf_req_id = 0;
2231 }
2232 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2233out:
2234 spin_unlock_irq(&qdio->req_q_lock);
2235 return retval;
2236}
2237
2238static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
2239{
2240 struct scsi_device *sdev = req->data;
2241 struct zfcp_scsi_dev *zfcp_sdev;
2242
2243 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2244 return;
2245
2246 zfcp_sdev = sdev_to_zfcp(sdev);
2247
2248 switch (req->qtcb->header.fsf_status) {
2249 case FSF_PORT_HANDLE_NOT_VALID:
2250 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
2251 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2252 break;
2253 case FSF_LUN_HANDLE_NOT_VALID:
2254 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
2255 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2256 break;
2257 case FSF_PORT_BOXED:
2258 zfcp_erp_set_port_status(zfcp_sdev->port,
2259 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2260 zfcp_erp_port_reopen(zfcp_sdev->port,
2261 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
2262 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2263 break;
2264 case FSF_ADAPTER_STATUS_AVAILABLE:
2265 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2266 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2267 zfcp_fc_test_link(zfcp_sdev->port);
2268 fallthrough;
2269 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2270 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2271 break;
2272 }
2273 break;
2274 case FSF_GOOD:
2275 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
2276 break;
2277 }
2278}
2279
2280/**
2281 * zfcp_fsf_close_lun - close LUN
2282 * @erp_action: pointer to erp_action triggering the "close LUN"
2283 * Returns: 0 on success, error otherwise
2284 */
2285int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
2286{
2287 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2288 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
2289 struct zfcp_fsf_req *req;
2290 int retval = -EIO;
2291
2292 spin_lock_irq(&qdio->req_q_lock);
2293 if (zfcp_qdio_sbal_get(qdio))
2294 goto out;
2295
2296 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2297 SBAL_SFLAGS0_TYPE_READ,
2298 qdio->adapter->pool.erp_req);
2299
2300 if (IS_ERR(req)) {
2301 retval = PTR_ERR(req);
2302 goto out;
2303 }
2304
2305 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2306 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2307
2308 req->qtcb->header.port_handle = erp_action->port->handle;
2309 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2310 req->handler = zfcp_fsf_close_lun_handler;
2311 req->data = erp_action->sdev;
2312 req->erp_action = erp_action;
2313 erp_action->fsf_req_id = req->req_id;
2314
2315 zfcp_fsf_start_erp_timer(req);
2316 retval = zfcp_fsf_req_send(req);
2317 if (retval) {
2318 zfcp_fsf_req_free(req);
2319 erp_action->fsf_req_id = 0;
2320 }
2321 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2322out:
2323 spin_unlock_irq(&qdio->req_q_lock);
2324 return retval;
2325}
2326
2327static void zfcp_fsf_update_lat(struct zfcp_latency_record *lat_rec, u32 lat)
2328{
2329 lat_rec->sum += lat;
2330 lat_rec->min = min(lat_rec->min, lat);
2331 lat_rec->max = max(lat_rec->max, lat);
2332}
2333
2334static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2335{
2336 struct fsf_qual_latency_info *lat_in;
2337 struct zfcp_latency_cont *lat = NULL;
2338 struct zfcp_scsi_dev *zfcp_sdev;
2339 struct zfcp_blk_drv_data blktrc;
2340 int ticks = req->adapter->timer_ticks;
2341
2342 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2343
2344 blktrc.flags = 0;
2345 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2346 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2347 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2348 blktrc.inb_usage = 0;
2349 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2350
2351 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2352 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2353 zfcp_sdev = sdev_to_zfcp(scsi->device);
2354 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2355 blktrc.channel_lat = lat_in->channel_lat * ticks;
2356 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2357
2358 switch (req->qtcb->bottom.io.data_direction) {
2359 case FSF_DATADIR_DIF_READ_STRIP:
2360 case FSF_DATADIR_DIF_READ_CONVERT:
2361 case FSF_DATADIR_READ:
2362 lat = &zfcp_sdev->latencies.read;
2363 break;
2364 case FSF_DATADIR_DIF_WRITE_INSERT:
2365 case FSF_DATADIR_DIF_WRITE_CONVERT:
2366 case FSF_DATADIR_WRITE:
2367 lat = &zfcp_sdev->latencies.write;
2368 break;
2369 case FSF_DATADIR_CMND:
2370 lat = &zfcp_sdev->latencies.cmd;
2371 break;
2372 }
2373
2374 if (lat) {
2375 spin_lock(&zfcp_sdev->latencies.lock);
2376 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2377 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2378 lat->counter++;
2379 spin_unlock(&zfcp_sdev->latencies.lock);
2380 }
2381 }
2382
2383 blk_add_driver_data(scsi_cmd_to_rq(scsi), &blktrc, sizeof(blktrc));
2384}
2385
2386/**
2387 * zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF.
2388 * @req: Pointer to FSF request.
2389 * @sdev: Pointer to SCSI device as request context.
2390 */
2391static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req,
2392 struct scsi_device *sdev)
2393{
2394 struct zfcp_scsi_dev *zfcp_sdev;
2395 struct fsf_qtcb_header *header = &req->qtcb->header;
2396
2397 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2398 return;
2399
2400 zfcp_sdev = sdev_to_zfcp(sdev);
2401
2402 switch (header->fsf_status) {
2403 case FSF_HANDLE_MISMATCH:
2404 case FSF_PORT_HANDLE_NOT_VALID:
2405 zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1");
2406 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2407 break;
2408 case FSF_FCPLUN_NOT_VALID:
2409 case FSF_LUN_HANDLE_NOT_VALID:
2410 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2411 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2412 break;
2413 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2414 zfcp_fsf_class_not_supp(req);
2415 break;
2416 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2417 dev_err(&req->adapter->ccw_device->dev,
2418 "Incorrect direction %d, LUN 0x%016Lx on port "
2419 "0x%016Lx closed\n",
2420 req->qtcb->bottom.io.data_direction,
2421 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2422 (unsigned long long)zfcp_sdev->port->wwpn);
2423 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3");
2424 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2425 break;
2426 case FSF_CMND_LENGTH_NOT_VALID:
2427 dev_err(&req->adapter->ccw_device->dev,
2428 "Incorrect FCP_CMND length %d, FCP device closed\n",
2429 req->qtcb->bottom.io.fcp_cmnd_length);
2430 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4");
2431 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2432 break;
2433 case FSF_PORT_BOXED:
2434 zfcp_erp_set_port_status(zfcp_sdev->port,
2435 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2436 zfcp_erp_port_reopen(zfcp_sdev->port,
2437 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2438 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2439 break;
2440 case FSF_LUN_BOXED:
2441 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2442 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2443 "fssfch6");
2444 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2445 break;
2446 case FSF_ADAPTER_STATUS_AVAILABLE:
2447 if (header->fsf_status_qual.word[0] ==
2448 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2449 zfcp_fc_test_link(zfcp_sdev->port);
2450 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2451 break;
2452 case FSF_SECURITY_ERROR:
2453 zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
2454 header->fsf_status_qual.word[0],
2455 zfcp_sdev->port->wwpn);
2456 zfcp_erp_port_forced_reopen(zfcp_sdev->port, 0, "fssfch7");
2457 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2458 break;
2459 }
2460}
2461
2462static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2463{
2464 struct scsi_cmnd *scpnt;
2465 struct fcp_resp_with_ext *fcp_rsp;
2466 unsigned long flags;
2467
2468 read_lock_irqsave(&req->adapter->abort_lock, flags);
2469
2470 scpnt = req->data;
2471 if (unlikely(!scpnt)) {
2472 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2473 return;
2474 }
2475
2476 zfcp_fsf_fcp_handler_common(req, scpnt->device);
2477
2478 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2479 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2480 goto skip_fsfstatus;
2481 }
2482
2483 switch (req->qtcb->header.fsf_status) {
2484 case FSF_INCONSISTENT_PROT_DATA:
2485 case FSF_INVALID_PROT_PARM:
2486 set_host_byte(scpnt, DID_ERROR);
2487 goto skip_fsfstatus;
2488 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2489 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2490 goto skip_fsfstatus;
2491 case FSF_APP_TAG_CHECK_FAILURE:
2492 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2493 goto skip_fsfstatus;
2494 case FSF_REF_TAG_CHECK_FAILURE:
2495 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2496 goto skip_fsfstatus;
2497 }
2498 BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2499 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2500 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2501
2502skip_fsfstatus:
2503 zfcp_fsf_req_trace(req, scpnt);
2504 zfcp_dbf_scsi_result(scpnt, req);
2505
2506 scpnt->host_scribble = NULL;
2507 scsi_done(scpnt);
2508 /*
2509 * We must hold this lock until scsi_done has been called.
2510 * Otherwise we may call scsi_done after abort regarding this
2511 * command has completed.
2512 * Note: scsi_done must not block!
2513 */
2514 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2515}
2516
2517static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2518{
2519 switch (scsi_get_prot_op(scsi_cmnd)) {
2520 case SCSI_PROT_NORMAL:
2521 switch (scsi_cmnd->sc_data_direction) {
2522 case DMA_NONE:
2523 *data_dir = FSF_DATADIR_CMND;
2524 break;
2525 case DMA_FROM_DEVICE:
2526 *data_dir = FSF_DATADIR_READ;
2527 break;
2528 case DMA_TO_DEVICE:
2529 *data_dir = FSF_DATADIR_WRITE;
2530 break;
2531 case DMA_BIDIRECTIONAL:
2532 return -EINVAL;
2533 }
2534 break;
2535
2536 case SCSI_PROT_READ_STRIP:
2537 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2538 break;
2539 case SCSI_PROT_WRITE_INSERT:
2540 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2541 break;
2542 case SCSI_PROT_READ_PASS:
2543 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2544 break;
2545 case SCSI_PROT_WRITE_PASS:
2546 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2547 break;
2548 default:
2549 return -EINVAL;
2550 }
2551
2552 return 0;
2553}
2554
2555/**
2556 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2557 * @scsi_cmnd: scsi command to be sent
2558 */
2559int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2560{
2561 struct zfcp_fsf_req *req;
2562 struct fcp_cmnd *fcp_cmnd;
2563 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2564 int retval = -EIO;
2565 struct scsi_device *sdev = scsi_cmnd->device;
2566 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2567 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2568 struct zfcp_qdio *qdio = adapter->qdio;
2569 struct fsf_qtcb_bottom_io *io;
2570 unsigned long flags;
2571
2572 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2573 ZFCP_STATUS_COMMON_UNBLOCKED)))
2574 return -EBUSY;
2575
2576 spin_lock_irqsave(&qdio->req_q_lock, flags);
2577 if (atomic_read(&qdio->req_q_free) <= 0) {
2578 atomic_inc(&qdio->req_q_full);
2579 goto out;
2580 }
2581
2582 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2583 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2584
2585 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2586 sbtype, adapter->pool.scsi_req);
2587
2588 if (IS_ERR(req)) {
2589 retval = PTR_ERR(req);
2590 goto out;
2591 }
2592
2593 BUILD_BUG_ON(sizeof(scsi_cmnd->host_scribble) < sizeof(req->req_id));
2594 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2595
2596 io = &req->qtcb->bottom.io;
2597 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2598 req->data = scsi_cmnd;
2599 req->handler = zfcp_fsf_fcp_cmnd_handler;
2600 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2601 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2602 io->service_class = FSF_CLASS_3;
2603 io->fcp_cmnd_length = FCP_CMND_LEN;
2604
2605 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2606 io->data_block_length = scsi_prot_interval(scsi_cmnd);
2607 io->ref_tag_value = scsi_prot_ref_tag(scsi_cmnd);
2608 }
2609
2610 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2611 goto failed_scsi_cmnd;
2612
2613 BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2614 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2615 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2616
2617 if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2618 scsi_prot_sg_count(scsi_cmnd)) {
2619 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2620 scsi_prot_sg_count(scsi_cmnd));
2621 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2622 scsi_prot_sglist(scsi_cmnd));
2623 if (retval)
2624 goto failed_scsi_cmnd;
2625 io->prot_data_length = zfcp_qdio_real_bytes(
2626 scsi_prot_sglist(scsi_cmnd));
2627 }
2628
2629 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2630 scsi_sglist(scsi_cmnd));
2631 if (unlikely(retval))
2632 goto failed_scsi_cmnd;
2633
2634 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2635 if (zfcp_adapter_multi_buffer_active(adapter))
2636 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2637
2638 retval = zfcp_fsf_req_send(req);
2639 if (unlikely(retval))
2640 goto failed_scsi_cmnd;
2641 /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2642
2643 goto out;
2644
2645failed_scsi_cmnd:
2646 zfcp_fsf_req_free(req);
2647 scsi_cmnd->host_scribble = NULL;
2648out:
2649 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2650 return retval;
2651}
2652
2653static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2654{
2655 struct scsi_device *sdev = req->data;
2656 struct fcp_resp_with_ext *fcp_rsp;
2657 struct fcp_resp_rsp_info *rsp_info;
2658
2659 zfcp_fsf_fcp_handler_common(req, sdev);
2660
2661 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2662 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2663
2664 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2665 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2666 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2667}
2668
2669/**
2670 * zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF).
2671 * @sdev: Pointer to SCSI device to send the task management command to.
2672 * @tm_flags: Unsigned byte for task management flags.
2673 *
2674 * Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise.
2675 */
2676struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
2677 u8 tm_flags)
2678{
2679 struct zfcp_fsf_req *req = NULL;
2680 struct fcp_cmnd *fcp_cmnd;
2681 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2682 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2683
2684 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2685 ZFCP_STATUS_COMMON_UNBLOCKED)))
2686 return NULL;
2687
2688 spin_lock_irq(&qdio->req_q_lock);
2689 if (zfcp_qdio_sbal_get(qdio))
2690 goto out;
2691
2692 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2693 SBAL_SFLAGS0_TYPE_WRITE,
2694 qdio->adapter->pool.scsi_req);
2695
2696 if (IS_ERR(req)) {
2697 req = NULL;
2698 goto out;
2699 }
2700
2701 req->data = sdev;
2702
2703 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2704 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2705 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2706 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2707 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2708 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2709
2710 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2711
2712 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2713 zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags);
2714
2715 zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
2716 if (!zfcp_fsf_req_send(req)) {
2717 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
2718 goto out;
2719 }
2720
2721 zfcp_fsf_req_free(req);
2722 req = NULL;
2723out:
2724 spin_unlock_irq(&qdio->req_q_lock);
2725 return req;
2726}
2727
2728/**
2729 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2730 * @qdio: pointer to struct zfcp_qdio
2731 * @sbal_idx: response queue index of SBAL to be processed
2732 */
2733void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2734{
2735 struct zfcp_adapter *adapter = qdio->adapter;
2736 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2737 struct qdio_buffer_element *sbale;
2738 struct zfcp_fsf_req *fsf_req;
2739 u64 req_id;
2740 int idx;
2741
2742 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2743
2744 sbale = &sbal->element[idx];
2745 req_id = dma64_to_u64(sbale->addr);
2746 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2747
2748 if (!fsf_req) {
2749 /*
2750 * Unknown request means that we have potentially memory
2751 * corruption and must stop the machine immediately.
2752 */
2753 zfcp_qdio_siosl(adapter);
2754 panic("error: unknown req_id (%llx) on adapter %s.\n",
2755 req_id, dev_name(&adapter->ccw_device->dev));
2756 }
2757
2758 zfcp_fsf_req_complete(fsf_req);
2759
2760 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2761 break;
2762 }
2763}